From b35019c7ce93a29c169f8b6fb18b2b7c28b53299 Mon Sep 17 00:00:00 2001 From: surrim Date: Tue, 31 Jan 2023 16:23:49 +0000 Subject: [PATCH] Update event_osm (#154) * Changed my name * Added PHP 7 dependency * Improved translations * Added Spanish translations * Avoid regex pattern for file name * Whitespaces fixed * Optimized code for compressing GPX files * JavaScript code changed for Geo-JSON version 3 and better readability * Added *.map files * Only add done gpx tracks to the total sum * Update event_osm to 0.4.0 * Only add done gpx tracks to the total sum * Added missing *.map files * JavaScript code changed for Geo-JSON version 3 and better readability * Optimized code for compressing GPX files * Whitespaces fixed * Avoid regex pattern for file name * Added Spanish translations * Improved translations * Added PHP 7 dependency * Changed my name --------- Co-authored-by: surrim --- serendipity_event_osm/ChangeLog | 13 +++ serendipity_event_osm/UTF-8/lang_de.inc.php | 5 +- serendipity_event_osm/UTF-8/lang_es.inc.php | 22 +++++ serendipity_event_osm/lang_de.inc.php | 4 +- serendipity_event_osm/lang_en.inc.php | 4 +- serendipity_event_osm/lang_es.inc.php | 23 +++++ serendipity_event_osm/plugin_version.inc.php | 4 +- serendipity_event_osm/ressources/ol.css.map | 1 + serendipity_event_osm/ressources/ol.js.map | 1 + serendipity_event_osm/ressources/osm.js | 98 ++++++++++++------- .../serendipity_event_osm.php | 4 +- .../serendipity_event_static_osm.php | 47 +++++---- 12 files changed, 153 insertions(+), 73 deletions(-) create mode 100644 serendipity_event_osm/UTF-8/lang_es.inc.php create mode 100644 serendipity_event_osm/lang_es.inc.php create mode 100644 serendipity_event_osm/ressources/ol.css.map create mode 100644 serendipity_event_osm/ressources/ol.js.map diff --git a/serendipity_event_osm/ChangeLog b/serendipity_event_osm/ChangeLog index cc31d29e..8272bcfe 100644 --- a/serendipity_event_osm/ChangeLog +++ b/serendipity_event_osm/ChangeLog @@ -1,3 +1,16 @@ +0.4.0: +--- + * Only add done gpx tracks to the total sum + * Added missing *.map files + * JavaScript code changed for Geo-JSON version 3 and better readability + * Optimized code for compressing GPX files + * Whitespaces fixed + * Avoid regex pattern for file name + * Added Spanish translations + * Improved translations + * Added PHP 7 dependency + * Changed my name + 0.3.13: --- * OpenLayers updated to v7.2.2 diff --git a/serendipity_event_osm/UTF-8/lang_de.inc.php b/serendipity_event_osm/UTF-8/lang_de.inc.php index 2d7c3699..ef6ae709 100644 --- a/serendipity_event_osm/UTF-8/lang_de.inc.php +++ b/serendipity_event_osm/UTF-8/lang_de.inc.php @@ -1,5 +1,4 @@ } */\nconst messages = {\n 1: 'The view center is not defined',\n 2: 'The view resolution is not defined',\n 3: 'The view rotation is not defined',\n 4: '`image` and `src` cannot be provided at the same time',\n 5: '`imgSize` must be set when `image` is provided',\n 7: '`format` must be set when `url` is set',\n 8: 'Unknown `serverType` configured',\n 9: '`url` must be configured or set using `#setUrl()`',\n 10: 'The default `geometryFunction` can only handle `Point` geometries',\n 11: '`options.featureTypes` must be an Array',\n 12: '`options.geometryName` must also be provided when `options.bbox` is set',\n 13: 'Invalid corner',\n 14: 'Invalid color',\n 15: 'Tried to get a value for a key that does not exist in the cache',\n 16: 'Tried to set a value for a key that is used already',\n 17: '`resolutions` must be sorted in descending order',\n 18: 'Either `origin` or `origins` must be configured, never both',\n 19: 'Number of `tileSizes` and `resolutions` must be equal',\n 20: 'Number of `origins` and `resolutions` must be equal',\n 22: 'Either `tileSize` or `tileSizes` must be configured, never both',\n 24: 'Invalid extent or geometry provided as `geometry`',\n 25: 'Cannot fit empty extent provided as `geometry`',\n 26: 'Features must have an id set',\n 27: 'Features must have an id set',\n 28: '`renderMode` must be `\"hybrid\"` or `\"vector\"`',\n 30: 'The passed `feature` was already added to the source',\n 31: 'Tried to enqueue an `element` that was already added to the queue',\n 32: 'Transformation matrix cannot be inverted',\n 33: 'Invalid units',\n 34: 'Invalid geometry layout',\n 36: 'Unknown SRS type',\n 37: 'Unknown geometry type found',\n 38: '`styleMapValue` has an unknown type',\n 39: 'Unknown geometry type',\n 40: 'Expected `feature` to have a geometry',\n 41: 'Expected an `ol/style/Style` or an array of `ol/style/Style.js`',\n 42: 'Question unknown, the answer is 42',\n 43: 'Expected `layers` to be an array or a `Collection`',\n 47: 'Expected `controls` to be an array or an `ol/Collection`',\n 48: 'Expected `interactions` to be an array or an `ol/Collection`',\n 49: 'Expected `overlays` to be an array or an `ol/Collection`',\n 50: '`options.featureTypes` should be an Array',\n 51: 'Either `url` or `tileJSON` options must be provided',\n 52: 'Unknown `serverType` configured',\n 53: 'Unknown `tierSizeCalculation` configured',\n 55: 'The {-y} placeholder requires a tile grid with extent',\n 56: 'mapBrowserEvent must originate from a pointer event',\n 57: 'At least 2 conditions are required',\n 59: 'Invalid command found in the PBF',\n 60: 'Missing or invalid `size`',\n 61: 'Cannot determine IIIF Image API version from provided image information JSON',\n 62: 'A `WebGLArrayBuffer` must either be of type `ELEMENT_ARRAY_BUFFER` or `ARRAY_BUFFER`',\n 64: 'Layer opacity must be a number',\n 66: '`forEachFeatureAtCoordinate` cannot be used on a WebGL layer if the hit detection logic has not been enabled. This is done by providing adequate shaders using the `hitVertexShader` and `hitFragmentShader` properties of `WebGLPointsLayerRenderer`',\n 67: 'A layer can only be added to the map once. Use either `layer.setMap()` or `map.addLayer()`, not both',\n 68: 'A VectorTile source can only be rendered if it has a projection compatible with the view projection',\n 69: '`width` or `height` cannot be provided together with `scale`',\n};\n\n/**\n * Error object thrown when an assertion failed. This is an ECMA-262 Error,\n * extended with a `code` property.\n * See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error.\n */\nclass AssertionError extends Error {\n /**\n * @param {number} code Error code.\n */\n constructor(code) {\n const message = messages[code];\n\n super(message);\n\n /**\n * Error code. The meaning of the code can be found on\n * https://openlayers.org/en/latest/doc/errors/ (replace `latest` with\n * the version found in the OpenLayers script's header comment if a version\n * other than the latest is used).\n * @type {number}\n * @deprecated ol/AssertionError and error codes will be removed in v8.0\n * @api\n */\n this.code = code;\n\n /**\n * @type {string}\n */\n this.name = 'AssertionError';\n\n // Re-assign message, see https://github.com/Rich-Harris/buble/issues/40\n this.message = message;\n }\n}\n\nexport default AssertionError;\n","/**\n * @module ol/events/Event\n */\n\n/**\n * @classdesc\n * Stripped down implementation of the W3C DOM Level 2 Event interface.\n * See https://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-interface.\n *\n * This implementation only provides `type` and `target` properties, and\n * `stopPropagation` and `preventDefault` methods. It is meant as base class\n * for higher level events defined in the library, and works with\n * {@link module:ol/events/Target~Target}.\n */\nclass BaseEvent {\n /**\n * @param {string} type Type.\n */\n constructor(type) {\n /**\n * @type {boolean}\n */\n this.propagationStopped;\n\n /**\n * @type {boolean}\n */\n this.defaultPrevented;\n\n /**\n * The event type.\n * @type {string}\n * @api\n */\n this.type = type;\n\n /**\n * The event target.\n * @type {Object}\n * @api\n */\n this.target = null;\n }\n\n /**\n * Prevent default. This means that no emulated `click`, `singleclick` or `doubleclick` events\n * will be fired.\n * @api\n */\n preventDefault() {\n this.defaultPrevented = true;\n }\n\n /**\n * Stop event propagation.\n * @api\n */\n stopPropagation() {\n this.propagationStopped = true;\n }\n}\n\n/**\n * @param {Event|import(\"./Event.js\").default} evt Event\n */\nexport function stopPropagation(evt) {\n evt.stopPropagation();\n}\n\n/**\n * @param {Event|import(\"./Event.js\").default} evt Event\n */\nexport function preventDefault(evt) {\n evt.preventDefault();\n}\n\nexport default BaseEvent;\n","/**\n * @module ol/ObjectEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n /**\n * Triggered when a property is changed.\n * @event module:ol/Object.ObjectEvent#propertychange\n * @api\n */\n PROPERTYCHANGE: 'propertychange',\n};\n\n/**\n * @typedef {'propertychange'} Types\n */\n","/**\n * @module ol/Disposable\n */\n\n/**\n * @classdesc\n * Objects that need to clean up after themselves.\n */\nclass Disposable {\n constructor() {\n /**\n * The object has already been disposed.\n * @type {boolean}\n * @protected\n */\n this.disposed = false;\n }\n\n /**\n * Clean up.\n */\n dispose() {\n if (!this.disposed) {\n this.disposed = true;\n this.disposeInternal();\n }\n }\n\n /**\n * Extension point for disposable objects.\n * @protected\n */\n disposeInternal() {}\n}\n\nexport default Disposable;\n","/**\n * @module ol/array\n */\n\n/**\n * Performs a binary search on the provided sorted list and returns the index of the item if found. If it can't be found it'll return -1.\n * https://github.com/darkskyapp/binary-search\n *\n * @param {Array<*>} haystack Items to search through.\n * @param {*} needle The item to look for.\n * @param {Function} [comparator] Comparator function.\n * @return {number} The index of the item if found, -1 if not.\n */\nexport function binarySearch(haystack, needle, comparator) {\n let mid, cmp;\n comparator = comparator || ascending;\n let low = 0;\n let high = haystack.length;\n let found = false;\n\n while (low < high) {\n /* Note that \"(low + high) >>> 1\" may overflow, and results in a typecast\n * to double (which gives the wrong results). */\n mid = low + ((high - low) >> 1);\n cmp = +comparator(haystack[mid], needle);\n\n if (cmp < 0.0) {\n /* Too low. */\n low = mid + 1;\n } else {\n /* Key found or too high */\n high = mid;\n found = !cmp;\n }\n }\n\n /* Key not found. */\n return found ? low : ~low;\n}\n\n/**\n * Compare function sorting arrays in ascending order. Safe to use for numeric values.\n * @param {*} a The first object to be compared.\n * @param {*} b The second object to be compared.\n * @return {number} A negative number, zero, or a positive number as the first\n * argument is less than, equal to, or greater than the second.\n */\nexport function ascending(a, b) {\n return a > b ? 1 : a < b ? -1 : 0;\n}\n\n/**\n * {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution} can use a function\n * of this type to determine which nearest resolution to use.\n *\n * This function takes a `{number}` representing a value between two array entries,\n * a `{number}` representing the value of the nearest higher entry and\n * a `{number}` representing the value of the nearest lower entry\n * as arguments and returns a `{number}`. If a negative number or zero is returned\n * the lower value will be used, if a positive number is returned the higher value\n * will be used.\n * @typedef {function(number, number, number): number} NearestDirectionFunction\n * @api\n */\n\n/**\n * @param {Array} arr Array in descending order.\n * @param {number} target Target.\n * @param {number|NearestDirectionFunction} direction\n * 0 means return the nearest,\n * > 0 means return the largest nearest,\n * < 0 means return the smallest nearest.\n * @return {number} Index.\n */\nexport function linearFindNearest(arr, target, direction) {\n const n = arr.length;\n if (arr[0] <= target) {\n return 0;\n } else if (target <= arr[n - 1]) {\n return n - 1;\n }\n let i;\n if (direction > 0) {\n for (i = 1; i < n; ++i) {\n if (arr[i] < target) {\n return i - 1;\n }\n }\n } else if (direction < 0) {\n for (i = 1; i < n; ++i) {\n if (arr[i] <= target) {\n return i;\n }\n }\n } else {\n for (i = 1; i < n; ++i) {\n if (arr[i] == target) {\n return i;\n } else if (arr[i] < target) {\n if (typeof direction === 'function') {\n if (direction(target, arr[i - 1], arr[i]) > 0) {\n return i - 1;\n }\n return i;\n } else if (arr[i - 1] - target < target - arr[i]) {\n return i - 1;\n }\n return i;\n }\n }\n }\n return n - 1;\n}\n\n/**\n * @param {Array<*>} arr Array.\n * @param {number} begin Begin index.\n * @param {number} end End index.\n */\nexport function reverseSubArray(arr, begin, end) {\n while (begin < end) {\n const tmp = arr[begin];\n arr[begin] = arr[end];\n arr[end] = tmp;\n ++begin;\n --end;\n }\n}\n\n/**\n * @param {Array} arr The array to modify.\n * @param {!Array|VALUE} data The elements or arrays of elements to add to arr.\n * @template VALUE\n */\nexport function extend(arr, data) {\n const extension = Array.isArray(data) ? data : [data];\n const length = extension.length;\n for (let i = 0; i < length; i++) {\n arr[arr.length] = extension[i];\n }\n}\n\n/**\n * @param {Array} arr The array to modify.\n * @param {VALUE} obj The element to remove.\n * @template VALUE\n * @return {boolean} If the element was removed.\n */\nexport function remove(arr, obj) {\n const i = arr.indexOf(obj);\n const found = i > -1;\n if (found) {\n arr.splice(i, 1);\n }\n return found;\n}\n\n/**\n * @param {Array|Uint8ClampedArray} arr1 The first array to compare.\n * @param {Array|Uint8ClampedArray} arr2 The second array to compare.\n * @return {boolean} Whether the two arrays are equal.\n */\nexport function equals(arr1, arr2) {\n const len1 = arr1.length;\n if (len1 !== arr2.length) {\n return false;\n }\n for (let i = 0; i < len1; i++) {\n if (arr1[i] !== arr2[i]) {\n return false;\n }\n }\n return true;\n}\n\n/**\n * Sort the passed array such that the relative order of equal elements is preserved.\n * See https://en.wikipedia.org/wiki/Sorting_algorithm#Stability for details.\n * @param {Array<*>} arr The array to sort (modifies original).\n * @param {!function(*, *): number} compareFnc Comparison function.\n * @api\n */\nexport function stableSort(arr, compareFnc) {\n const length = arr.length;\n const tmp = Array(arr.length);\n let i;\n for (i = 0; i < length; i++) {\n tmp[i] = {index: i, value: arr[i]};\n }\n tmp.sort(function (a, b) {\n return compareFnc(a.value, b.value) || a.index - b.index;\n });\n for (i = 0; i < arr.length; i++) {\n arr[i] = tmp[i].value;\n }\n}\n\n/**\n * @param {Array<*>} arr The array to test.\n * @param {Function} [func] Comparison function.\n * @param {boolean} [strict] Strictly sorted (default false).\n * @return {boolean} Return index.\n */\nexport function isSorted(arr, func, strict) {\n const compare = func || ascending;\n return arr.every(function (currentVal, index) {\n if (index === 0) {\n return true;\n }\n const res = compare(arr[index - 1], currentVal);\n return !(res > 0 || (strict && res === 0));\n });\n}\n","/**\n * @module ol/functions\n */\n\nimport {equals as arrayEquals} from './array.js';\n\n/**\n * Always returns true.\n * @return {boolean} true.\n */\nexport function TRUE() {\n return true;\n}\n\n/**\n * Always returns false.\n * @return {boolean} false.\n */\nexport function FALSE() {\n return false;\n}\n\n/**\n * A reusable function, used e.g. as a default for callbacks.\n *\n * @return {void} Nothing.\n */\nexport function VOID() {}\n\n/**\n * Wrap a function in another function that remembers the last return. If the\n * returned function is called twice in a row with the same arguments and the same\n * this object, it will return the value from the first call in the second call.\n *\n * @param {function(...any): ReturnType} fn The function to memoize.\n * @return {function(...any): ReturnType} The memoized function.\n * @template ReturnType\n */\nexport function memoizeOne(fn) {\n let called = false;\n\n /** @type {ReturnType} */\n let lastResult;\n\n /** @type {Array} */\n let lastArgs;\n\n let lastThis;\n\n return function () {\n const nextArgs = Array.prototype.slice.call(arguments);\n if (!called || this !== lastThis || !arrayEquals(nextArgs, lastArgs)) {\n called = true;\n lastThis = this;\n lastArgs = nextArgs;\n lastResult = fn.apply(this, arguments);\n }\n return lastResult;\n };\n}\n\n/**\n * @template T\n * @param {function(): (T | Promise)} getter A function that returns a value or a promise for a value.\n * @return {Promise} A promise for the value.\n */\nexport function toPromise(getter) {\n function promiseGetter() {\n let value;\n try {\n value = getter();\n } catch (err) {\n return Promise.reject(err);\n }\n if (value instanceof Promise) {\n return value;\n }\n return Promise.resolve(value);\n }\n return promiseGetter();\n}\n","/**\n * @module ol/obj\n */\n\n/**\n * Removes all properties from an object.\n * @param {Object} object The object to clear.\n */\nexport function clear(object) {\n for (const property in object) {\n delete object[property];\n }\n}\n\n/**\n * Determine if an object has any properties.\n * @param {Object} object The object to check.\n * @return {boolean} The object is empty.\n */\nexport function isEmpty(object) {\n let property;\n for (property in object) {\n return false;\n }\n return !property;\n}\n","/**\n * @module ol/events/Target\n */\nimport Disposable from '../Disposable.js';\nimport Event from './Event.js';\nimport {VOID} from '../functions.js';\nimport {clear} from '../obj.js';\n\n/**\n * @typedef {EventTarget|Target} EventTargetLike\n */\n\n/**\n * @classdesc\n * A simplified implementation of the W3C DOM Level 2 EventTarget interface.\n * See https://www.w3.org/TR/2000/REC-DOM-Level-2-Events-20001113/events.html#Events-EventTarget.\n *\n * There are two important simplifications compared to the specification:\n *\n * 1. The handling of `useCapture` in `addEventListener` and\n * `removeEventListener`. There is no real capture model.\n * 2. The handling of `stopPropagation` and `preventDefault` on `dispatchEvent`.\n * There is no event target hierarchy. When a listener calls\n * `stopPropagation` or `preventDefault` on an event object, it means that no\n * more listeners after this one will be called. Same as when the listener\n * returns false.\n */\nclass Target extends Disposable {\n /**\n * @param {*} [target] Default event target for dispatched events.\n */\n constructor(target) {\n super();\n\n /**\n * @private\n * @type {*}\n */\n this.eventTarget_ = target;\n\n /**\n * @private\n * @type {Object}\n */\n this.pendingRemovals_ = null;\n\n /**\n * @private\n * @type {Object}\n */\n this.dispatching_ = null;\n\n /**\n * @private\n * @type {Object>}\n */\n this.listeners_ = null;\n }\n\n /**\n * @param {string} type Type.\n * @param {import(\"../events.js\").Listener} listener Listener.\n */\n addEventListener(type, listener) {\n if (!type || !listener) {\n return;\n }\n const listeners = this.listeners_ || (this.listeners_ = {});\n const listenersForType = listeners[type] || (listeners[type] = []);\n if (!listenersForType.includes(listener)) {\n listenersForType.push(listener);\n }\n }\n\n /**\n * Dispatches an event and calls all listeners listening for events\n * of this type. The event parameter can either be a string or an\n * Object with a `type` property.\n *\n * @param {import(\"./Event.js\").default|string} event Event object.\n * @return {boolean|undefined} `false` if anyone called preventDefault on the\n * event object or if any of the listeners returned false.\n * @api\n */\n dispatchEvent(event) {\n const isString = typeof event === 'string';\n const type = isString ? event : event.type;\n const listeners = this.listeners_ && this.listeners_[type];\n if (!listeners) {\n return;\n }\n\n const evt = isString ? new Event(event) : /** @type {Event} */ (event);\n if (!evt.target) {\n evt.target = this.eventTarget_ || this;\n }\n const dispatching = this.dispatching_ || (this.dispatching_ = {});\n const pendingRemovals =\n this.pendingRemovals_ || (this.pendingRemovals_ = {});\n if (!(type in dispatching)) {\n dispatching[type] = 0;\n pendingRemovals[type] = 0;\n }\n ++dispatching[type];\n let propagate;\n for (let i = 0, ii = listeners.length; i < ii; ++i) {\n if ('handleEvent' in listeners[i]) {\n propagate = /** @type {import(\"../events.js\").ListenerObject} */ (\n listeners[i]\n ).handleEvent(evt);\n } else {\n propagate = /** @type {import(\"../events.js\").ListenerFunction} */ (\n listeners[i]\n ).call(this, evt);\n }\n if (propagate === false || evt.propagationStopped) {\n propagate = false;\n break;\n }\n }\n if (--dispatching[type] === 0) {\n let pr = pendingRemovals[type];\n delete pendingRemovals[type];\n while (pr--) {\n this.removeEventListener(type, VOID);\n }\n delete dispatching[type];\n }\n return propagate;\n }\n\n /**\n * Clean up.\n */\n disposeInternal() {\n this.listeners_ && clear(this.listeners_);\n }\n\n /**\n * Get the listeners for a specified event type. Listeners are returned in the\n * order that they will be called in.\n *\n * @param {string} type Type.\n * @return {Array|undefined} Listeners.\n */\n getListeners(type) {\n return (this.listeners_ && this.listeners_[type]) || undefined;\n }\n\n /**\n * @param {string} [type] Type. If not provided,\n * `true` will be returned if this event target has any listeners.\n * @return {boolean} Has listeners.\n */\n hasListener(type) {\n if (!this.listeners_) {\n return false;\n }\n return type\n ? type in this.listeners_\n : Object.keys(this.listeners_).length > 0;\n }\n\n /**\n * @param {string} type Type.\n * @param {import(\"../events.js\").Listener} listener Listener.\n */\n removeEventListener(type, listener) {\n const listeners = this.listeners_ && this.listeners_[type];\n if (listeners) {\n const index = listeners.indexOf(listener);\n if (index !== -1) {\n if (this.pendingRemovals_ && type in this.pendingRemovals_) {\n // make listener a no-op, and remove later in #dispatchEvent()\n listeners[index] = VOID;\n ++this.pendingRemovals_[type];\n } else {\n listeners.splice(index, 1);\n if (listeners.length === 0) {\n delete this.listeners_[type];\n }\n }\n }\n }\n }\n}\n\nexport default Target;\n","/**\n * @module ol/events/EventType\n */\n\n/**\n * @enum {string}\n * @const\n */\nexport default {\n /**\n * Generic change event. Triggered when the revision counter is increased.\n * @event module:ol/events/Event~BaseEvent#change\n * @api\n */\n CHANGE: 'change',\n\n /**\n * Generic error event. Triggered when an error occurs.\n * @event module:ol/events/Event~BaseEvent#error\n * @api\n */\n ERROR: 'error',\n\n BLUR: 'blur',\n CLEAR: 'clear',\n CONTEXTMENU: 'contextmenu',\n CLICK: 'click',\n DBLCLICK: 'dblclick',\n DRAGENTER: 'dragenter',\n DRAGOVER: 'dragover',\n DROP: 'drop',\n FOCUS: 'focus',\n KEYDOWN: 'keydown',\n KEYPRESS: 'keypress',\n LOAD: 'load',\n RESIZE: 'resize',\n TOUCHMOVE: 'touchmove',\n WHEEL: 'wheel',\n};\n","/**\n * @module ol/events\n */\nimport {clear} from './obj.js';\n\n/**\n * Key to use with {@link module:ol/Observable.unByKey}.\n * @typedef {Object} EventsKey\n * @property {ListenerFunction} listener Listener.\n * @property {import(\"./events/Target.js\").EventTargetLike} target Target.\n * @property {string} type Type.\n * @api\n */\n\n/**\n * Listener function. This function is called with an event object as argument.\n * When the function returns `false`, event propagation will stop.\n *\n * @typedef {function((Event|import(\"./events/Event.js\").default)): (void|boolean)} ListenerFunction\n * @api\n */\n\n/**\n * @typedef {Object} ListenerObject\n * @property {ListenerFunction} handleEvent HandleEvent listener function.\n */\n\n/**\n * @typedef {ListenerFunction|ListenerObject} Listener\n */\n\n/**\n * Registers an event listener on an event target. Inspired by\n * https://google.github.io/closure-library/api/source/closure/goog/events/events.js.src.html\n *\n * This function efficiently binds a `listener` to a `this` object, and returns\n * a key for use with {@link module:ol/events.unlistenByKey}.\n *\n * @param {import(\"./events/Target.js\").EventTargetLike} target Event target.\n * @param {string} type Event type.\n * @param {ListenerFunction} listener Listener.\n * @param {Object} [thisArg] Object referenced by the `this` keyword in the\n * listener. Default is the `target`.\n * @param {boolean} [once] If true, add the listener as one-off listener.\n * @return {EventsKey} Unique key for the listener.\n */\nexport function listen(target, type, listener, thisArg, once) {\n if (thisArg && thisArg !== target) {\n listener = listener.bind(thisArg);\n }\n if (once) {\n const originalListener = listener;\n listener = function () {\n target.removeEventListener(type, listener);\n originalListener.apply(this, arguments);\n };\n }\n const eventsKey = {\n target: target,\n type: type,\n listener: listener,\n };\n target.addEventListener(type, listener);\n return eventsKey;\n}\n\n/**\n * Registers a one-off event listener on an event target. Inspired by\n * https://google.github.io/closure-library/api/source/closure/goog/events/events.js.src.html\n *\n * This function efficiently binds a `listener` as self-unregistering listener\n * to a `this` object, and returns a key for use with\n * {@link module:ol/events.unlistenByKey} in case the listener needs to be\n * unregistered before it is called.\n *\n * When {@link module:ol/events.listen} is called with the same arguments after this\n * function, the self-unregistering listener will be turned into a permanent\n * listener.\n *\n * @param {import(\"./events/Target.js\").EventTargetLike} target Event target.\n * @param {string} type Event type.\n * @param {ListenerFunction} listener Listener.\n * @param {Object} [thisArg] Object referenced by the `this` keyword in the\n * listener. Default is the `target`.\n * @return {EventsKey} Key for unlistenByKey.\n */\nexport function listenOnce(target, type, listener, thisArg) {\n return listen(target, type, listener, thisArg, true);\n}\n\n/**\n * Unregisters event listeners on an event target. Inspired by\n * https://google.github.io/closure-library/api/source/closure/goog/events/events.js.src.html\n *\n * The argument passed to this function is the key returned from\n * {@link module:ol/events.listen} or {@link module:ol/events.listenOnce}.\n *\n * @param {EventsKey} key The key.\n */\nexport function unlistenByKey(key) {\n if (key && key.target) {\n key.target.removeEventListener(key.type, key.listener);\n clear(key);\n }\n}\n","/**\n * @module ol/Observable\n */\nimport EventTarget from './events/Target.js';\nimport EventType from './events/EventType.js';\nimport {listen, listenOnce, unlistenByKey} from './events.js';\n\n/***\n * @template {string} Type\n * @template {Event|import(\"./events/Event.js\").default} EventClass\n * @template Return\n * @typedef {(type: Type, listener: (event: EventClass) => ?) => Return} OnSignature\n */\n\n/***\n * @template {string} Type\n * @template Return\n * @typedef {(type: Type[], listener: (event: Event|import(\"./events/Event\").default) => ?) => Return extends void ? void : Return[]} CombinedOnSignature\n */\n\n/**\n * @typedef {'change'|'error'} EventTypes\n */\n\n/***\n * @template Return\n * @typedef {OnSignature & CombinedOnSignature} ObservableOnSignature\n */\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * An event target providing convenient methods for listener registration\n * and unregistration. A generic `change` event is always available through\n * {@link module:ol/Observable~Observable#changed}.\n *\n * @fires import(\"./events/Event.js\").default\n * @api\n */\nclass Observable extends EventTarget {\n constructor() {\n super();\n\n this.on =\n /** @type {ObservableOnSignature} */ (\n this.onInternal\n );\n\n this.once =\n /** @type {ObservableOnSignature} */ (\n this.onceInternal\n );\n\n this.un = /** @type {ObservableOnSignature} */ (this.unInternal);\n\n /**\n * @private\n * @type {number}\n */\n this.revision_ = 0;\n }\n\n /**\n * Increases the revision counter and dispatches a 'change' event.\n * @api\n */\n changed() {\n ++this.revision_;\n this.dispatchEvent(EventType.CHANGE);\n }\n\n /**\n * Get the version number for this object. Each time the object is modified,\n * its version number will be incremented.\n * @return {number} Revision.\n * @api\n */\n getRevision() {\n return this.revision_;\n }\n\n /**\n * @param {string|Array} type Type.\n * @param {function((Event|import(\"./events/Event\").default)): ?} listener Listener.\n * @return {import(\"./events.js\").EventsKey|Array} Event key.\n * @protected\n */\n onInternal(type, listener) {\n if (Array.isArray(type)) {\n const len = type.length;\n const keys = new Array(len);\n for (let i = 0; i < len; ++i) {\n keys[i] = listen(this, type[i], listener);\n }\n return keys;\n }\n return listen(this, /** @type {string} */ (type), listener);\n }\n\n /**\n * @param {string|Array} type Type.\n * @param {function((Event|import(\"./events/Event\").default)): ?} listener Listener.\n * @return {import(\"./events.js\").EventsKey|Array} Event key.\n * @protected\n */\n onceInternal(type, listener) {\n let key;\n if (Array.isArray(type)) {\n const len = type.length;\n key = new Array(len);\n for (let i = 0; i < len; ++i) {\n key[i] = listenOnce(this, type[i], listener);\n }\n } else {\n key = listenOnce(this, /** @type {string} */ (type), listener);\n }\n /** @type {Object} */ (listener).ol_key = key;\n return key;\n }\n\n /**\n * Unlisten for a certain type of event.\n * @param {string|Array} type Type.\n * @param {function((Event|import(\"./events/Event\").default)): ?} listener Listener.\n * @protected\n */\n unInternal(type, listener) {\n const key = /** @type {Object} */ (listener).ol_key;\n if (key) {\n unByKey(key);\n } else if (Array.isArray(type)) {\n for (let i = 0, ii = type.length; i < ii; ++i) {\n this.removeEventListener(type[i], listener);\n }\n } else {\n this.removeEventListener(type, listener);\n }\n }\n}\n\n/**\n * Listen for a certain type of event.\n * @function\n * @param {string|Array} type The event type or array of event types.\n * @param {function((Event|import(\"./events/Event\").default)): ?} listener The listener function.\n * @return {import(\"./events.js\").EventsKey|Array} Unique key for the listener. If\n * called with an array of event types as the first argument, the return\n * will be an array of keys.\n * @api\n */\nObservable.prototype.on;\n\n/**\n * Listen once for a certain type of event.\n * @function\n * @param {string|Array} type The event type or array of event types.\n * @param {function((Event|import(\"./events/Event\").default)): ?} listener The listener function.\n * @return {import(\"./events.js\").EventsKey|Array} Unique key for the listener. If\n * called with an array of event types as the first argument, the return\n * will be an array of keys.\n * @api\n */\nObservable.prototype.once;\n\n/**\n * Unlisten for a certain type of event.\n * @function\n * @param {string|Array} type The event type or array of event types.\n * @param {function((Event|import(\"./events/Event\").default)): ?} listener The listener function.\n * @api\n */\nObservable.prototype.un;\n\n/**\n * Removes an event listener using the key returned by `on()` or `once()`.\n * @param {import(\"./events.js\").EventsKey|Array} key The key returned by `on()`\n * or `once()` (or an array of keys).\n * @api\n */\nexport function unByKey(key) {\n if (Array.isArray(key)) {\n for (let i = 0, ii = key.length; i < ii; ++i) {\n unlistenByKey(key[i]);\n }\n } else {\n unlistenByKey(/** @type {import(\"./events.js\").EventsKey} */ (key));\n }\n}\n\nexport default Observable;\n","/**\n * @module ol/util\n */\n\n/**\n * @return {never} Any return.\n */\nexport function abstract() {\n throw new Error('Unimplemented abstract method.');\n}\n\n/**\n * Counter for getUid.\n * @type {number}\n * @private\n */\nlet uidCounter_ = 0;\n\n/**\n * Gets a unique ID for an object. This mutates the object so that further calls\n * with the same object as a parameter returns the same value. Unique IDs are generated\n * as a strictly increasing sequence. Adapted from goog.getUid.\n *\n * @param {Object} obj The object to get the unique ID for.\n * @return {string} The unique ID for the object.\n * @api\n */\nexport function getUid(obj) {\n return obj.ol_uid || (obj.ol_uid = String(++uidCounter_));\n}\n\n/**\n * OpenLayers version.\n * @type {string}\n */\nexport const VERSION = '7.2.2';\n","/**\n * @module ol/Object\n */\nimport Event from './events/Event.js';\nimport ObjectEventType from './ObjectEventType.js';\nimport Observable from './Observable.js';\nimport {getUid} from './util.js';\nimport {isEmpty} from './obj.js';\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/Object~BaseObject} instances are instances of this type.\n */\nexport class ObjectEvent extends Event {\n /**\n * @param {string} type The event type.\n * @param {string} key The property name.\n * @param {*} oldValue The old value for `key`.\n */\n constructor(type, key, oldValue) {\n super(type);\n\n /**\n * The name of the property whose value is changing.\n * @type {string}\n * @api\n */\n this.key = key;\n\n /**\n * The old value. To get the new value use `e.target.get(e.key)` where\n * `e` is the event object.\n * @type {*}\n * @api\n */\n this.oldValue = oldValue;\n }\n}\n\n/***\n * @template Return\n * @typedef {import(\"./Observable\").OnSignature &\n * import(\"./Observable\").OnSignature &\n * import(\"./Observable\").CombinedOnSignature} ObjectOnSignature\n */\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Most non-trivial classes inherit from this.\n *\n * This extends {@link module:ol/Observable~Observable} with observable\n * properties, where each property is observable as well as the object as a\n * whole.\n *\n * Classes that inherit from this have pre-defined properties, to which you can\n * add your owns. The pre-defined properties are listed in this documentation as\n * 'Observable Properties', and have their own accessors; for example,\n * {@link module:ol/Map~Map} has a `target` property, accessed with\n * `getTarget()` and changed with `setTarget()`. Not all properties are however\n * settable. There are also general-purpose accessors `get()` and `set()`. For\n * example, `get('target')` is equivalent to `getTarget()`.\n *\n * The `set` accessors trigger a change event, and you can monitor this by\n * registering a listener. For example, {@link module:ol/View~View} has a\n * `center` property, so `view.on('change:center', function(evt) {...});` would\n * call the function whenever the value of the center property changes. Within\n * the function, `evt.target` would be the view, so `evt.target.getCenter()`\n * would return the new center.\n *\n * You can add your own observable properties with\n * `object.set('prop', 'value')`, and retrieve that with `object.get('prop')`.\n * You can listen for changes on that property value with\n * `object.on('change:prop', listener)`. You can get a list of all\n * properties with {@link module:ol/Object~BaseObject#getProperties}.\n *\n * Note that the observable properties are separate from standard JS properties.\n * You can, for example, give your map object a title with\n * `map.title='New title'` and with `map.set('title', 'Another title')`. The\n * first will be a `hasOwnProperty`; the second will appear in\n * `getProperties()`. Only the second is observable.\n *\n * Properties can be deleted by using the unset method. E.g.\n * object.unset('foo').\n *\n * @fires ObjectEvent\n * @api\n */\nclass BaseObject extends Observable {\n /**\n * @param {Object} [values] An object with key-value pairs.\n */\n constructor(values) {\n super();\n\n /***\n * @type {ObjectOnSignature}\n */\n this.on;\n\n /***\n * @type {ObjectOnSignature}\n */\n this.once;\n\n /***\n * @type {ObjectOnSignature}\n */\n this.un;\n\n // Call {@link module:ol/util.getUid} to ensure that the order of objects' ids is\n // the same as the order in which they were created. This also helps to\n // ensure that object properties are always added in the same order, which\n // helps many JavaScript engines generate faster code.\n getUid(this);\n\n /**\n * @private\n * @type {Object}\n */\n this.values_ = null;\n\n if (values !== undefined) {\n this.setProperties(values);\n }\n }\n\n /**\n * Gets a value.\n * @param {string} key Key name.\n * @return {*} Value.\n * @api\n */\n get(key) {\n let value;\n if (this.values_ && this.values_.hasOwnProperty(key)) {\n value = this.values_[key];\n }\n return value;\n }\n\n /**\n * Get a list of object property names.\n * @return {Array} List of property names.\n * @api\n */\n getKeys() {\n return (this.values_ && Object.keys(this.values_)) || [];\n }\n\n /**\n * Get an object of all property names and values.\n * @return {Object} Object.\n * @api\n */\n getProperties() {\n return (this.values_ && Object.assign({}, this.values_)) || {};\n }\n\n /**\n * @return {boolean} The object has properties.\n */\n hasProperties() {\n return !!this.values_;\n }\n\n /**\n * @param {string} key Key name.\n * @param {*} oldValue Old value.\n */\n notify(key, oldValue) {\n let eventType;\n eventType = `change:${key}`;\n if (this.hasListener(eventType)) {\n this.dispatchEvent(new ObjectEvent(eventType, key, oldValue));\n }\n eventType = ObjectEventType.PROPERTYCHANGE;\n if (this.hasListener(eventType)) {\n this.dispatchEvent(new ObjectEvent(eventType, key, oldValue));\n }\n }\n\n /**\n * @param {string} key Key name.\n * @param {import(\"./events.js\").Listener} listener Listener.\n */\n addChangeListener(key, listener) {\n this.addEventListener(`change:${key}`, listener);\n }\n\n /**\n * @param {string} key Key name.\n * @param {import(\"./events.js\").Listener} listener Listener.\n */\n removeChangeListener(key, listener) {\n this.removeEventListener(`change:${key}`, listener);\n }\n\n /**\n * Sets a value.\n * @param {string} key Key name.\n * @param {*} value Value.\n * @param {boolean} [silent] Update without triggering an event.\n * @api\n */\n set(key, value, silent) {\n const values = this.values_ || (this.values_ = {});\n if (silent) {\n values[key] = value;\n } else {\n const oldValue = values[key];\n values[key] = value;\n if (oldValue !== value) {\n this.notify(key, oldValue);\n }\n }\n }\n\n /**\n * Sets a collection of key-value pairs. Note that this changes any existing\n * properties and adds new ones (it does not remove any existing properties).\n * @param {Object} values Values.\n * @param {boolean} [silent] Update without triggering an event.\n * @api\n */\n setProperties(values, silent) {\n for (const key in values) {\n this.set(key, values[key], silent);\n }\n }\n\n /**\n * Apply any properties from another object without triggering events.\n * @param {BaseObject} source The source object.\n * @protected\n */\n applyProperties(source) {\n if (!source.values_) {\n return;\n }\n Object.assign(this.values_ || (this.values_ = {}), source.values_);\n }\n\n /**\n * Unsets a property.\n * @param {string} key Key name.\n * @param {boolean} [silent] Unset without triggering an event.\n * @api\n */\n unset(key, silent) {\n if (this.values_ && key in this.values_) {\n const oldValue = this.values_[key];\n delete this.values_[key];\n if (isEmpty(this.values_)) {\n this.values_ = null;\n }\n if (!silent) {\n this.notify(key, oldValue);\n }\n }\n }\n}\n\nexport default BaseObject;\n","/**\n * @module ol/CollectionEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n /**\n * Triggered when an item is added to the collection.\n * @event module:ol/Collection.CollectionEvent#add\n * @api\n */\n ADD: 'add',\n /**\n * Triggered when an item is removed from the collection.\n * @event module:ol/Collection.CollectionEvent#remove\n * @api\n */\n REMOVE: 'remove',\n};\n","/**\n * @module ol/Collection\n */\nimport AssertionError from './AssertionError.js';\nimport BaseObject from './Object.js';\nimport CollectionEventType from './CollectionEventType.js';\nimport Event from './events/Event.js';\n\n/**\n * @enum {string}\n * @private\n */\nconst Property = {\n LENGTH: 'length',\n};\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/Collection~Collection} instances are instances of this\n * type.\n * @template T\n */\nexport class CollectionEvent extends Event {\n /**\n * @param {import(\"./CollectionEventType.js\").default} type Type.\n * @param {T} element Element.\n * @param {number} index The index of the added or removed element.\n */\n constructor(type, element, index) {\n super(type);\n\n /**\n * The element that is added to or removed from the collection.\n * @type {T}\n * @api\n */\n this.element = element;\n\n /**\n * The index of the added or removed element.\n * @type {number}\n * @api\n */\n this.index = index;\n }\n}\n\n/***\n * @template T\n * @template Return\n * @typedef {import(\"./Observable\").OnSignature &\n * import(\"./Observable\").OnSignature &\n * import(\"./Observable\").OnSignature<'add'|'remove', CollectionEvent, Return> &\n * import(\"./Observable\").CombinedOnSignature} CollectionOnSignature\n */\n\n/**\n * @typedef {Object} Options\n * @property {boolean} [unique=false] Disallow the same item from being added to\n * the collection twice.\n */\n\n/**\n * @classdesc\n * An expanded version of standard JS Array, adding convenience methods for\n * manipulation. Add and remove changes to the Collection trigger a Collection\n * event. Note that this does not cover changes to the objects _within_ the\n * Collection; they trigger events on the appropriate object, not on the\n * Collection as a whole.\n *\n * @fires CollectionEvent\n *\n * @template T\n * @api\n */\nclass Collection extends BaseObject {\n /**\n * @param {Array} [array] Array.\n * @param {Options} [options] Collection options.\n */\n constructor(array, options) {\n super();\n\n /***\n * @type {CollectionOnSignature}\n */\n this.on;\n\n /***\n * @type {CollectionOnSignature}\n */\n this.once;\n\n /***\n * @type {CollectionOnSignature}\n */\n this.un;\n\n options = options || {};\n\n /**\n * @private\n * @type {boolean}\n */\n this.unique_ = !!options.unique;\n\n /**\n * @private\n * @type {!Array}\n */\n this.array_ = array ? array : [];\n\n if (this.unique_) {\n for (let i = 0, ii = this.array_.length; i < ii; ++i) {\n this.assertUnique_(this.array_[i], i);\n }\n }\n\n this.updateLength_();\n }\n\n /**\n * Remove all elements from the collection.\n * @api\n */\n clear() {\n while (this.getLength() > 0) {\n this.pop();\n }\n }\n\n /**\n * Add elements to the collection. This pushes each item in the provided array\n * to the end of the collection.\n * @param {!Array} arr Array.\n * @return {Collection} This collection.\n * @api\n */\n extend(arr) {\n for (let i = 0, ii = arr.length; i < ii; ++i) {\n this.push(arr[i]);\n }\n return this;\n }\n\n /**\n * Iterate over each element, calling the provided callback.\n * @param {function(T, number, Array): *} f The function to call\n * for every element. This function takes 3 arguments (the element, the\n * index and the array). The return value is ignored.\n * @api\n */\n forEach(f) {\n const array = this.array_;\n for (let i = 0, ii = array.length; i < ii; ++i) {\n f(array[i], i, array);\n }\n }\n\n /**\n * Get a reference to the underlying Array object. Warning: if the array\n * is mutated, no events will be dispatched by the collection, and the\n * collection's \"length\" property won't be in sync with the actual length\n * of the array.\n * @return {!Array} Array.\n * @api\n */\n getArray() {\n return this.array_;\n }\n\n /**\n * Get the element at the provided index.\n * @param {number} index Index.\n * @return {T} Element.\n * @api\n */\n item(index) {\n return this.array_[index];\n }\n\n /**\n * Get the length of this collection.\n * @return {number} The length of the array.\n * @observable\n * @api\n */\n getLength() {\n return this.get(Property.LENGTH);\n }\n\n /**\n * Insert an element at the provided index.\n * @param {number} index Index.\n * @param {T} elem Element.\n * @api\n */\n insertAt(index, elem) {\n if (index < 0 || index > this.getLength()) {\n throw new Error('Index out of bounds: ' + index);\n }\n if (this.unique_) {\n this.assertUnique_(elem);\n }\n this.array_.splice(index, 0, elem);\n this.updateLength_();\n this.dispatchEvent(\n new CollectionEvent(CollectionEventType.ADD, elem, index)\n );\n }\n\n /**\n * Remove the last element of the collection and return it.\n * Return `undefined` if the collection is empty.\n * @return {T|undefined} Element.\n * @api\n */\n pop() {\n return this.removeAt(this.getLength() - 1);\n }\n\n /**\n * Insert the provided element at the end of the collection.\n * @param {T} elem Element.\n * @return {number} New length of the collection.\n * @api\n */\n push(elem) {\n if (this.unique_) {\n this.assertUnique_(elem);\n }\n const n = this.getLength();\n this.insertAt(n, elem);\n return this.getLength();\n }\n\n /**\n * Remove the first occurrence of an element from the collection.\n * @param {T} elem Element.\n * @return {T|undefined} The removed element or undefined if none found.\n * @api\n */\n remove(elem) {\n const arr = this.array_;\n for (let i = 0, ii = arr.length; i < ii; ++i) {\n if (arr[i] === elem) {\n return this.removeAt(i);\n }\n }\n return undefined;\n }\n\n /**\n * Remove the element at the provided index and return it.\n * Return `undefined` if the collection does not contain this index.\n * @param {number} index Index.\n * @return {T|undefined} Value.\n * @api\n */\n removeAt(index) {\n if (index < 0 || index >= this.getLength()) {\n return undefined;\n }\n const prev = this.array_[index];\n this.array_.splice(index, 1);\n this.updateLength_();\n this.dispatchEvent(\n /** @type {CollectionEvent} */ (\n new CollectionEvent(CollectionEventType.REMOVE, prev, index)\n )\n );\n return prev;\n }\n\n /**\n * Set the element at the provided index.\n * @param {number} index Index.\n * @param {T} elem Element.\n * @api\n */\n setAt(index, elem) {\n const n = this.getLength();\n if (index >= n) {\n this.insertAt(index, elem);\n return;\n }\n if (index < 0) {\n throw new Error('Index out of bounds: ' + index);\n }\n if (this.unique_) {\n this.assertUnique_(elem, index);\n }\n const prev = this.array_[index];\n this.array_[index] = elem;\n this.dispatchEvent(\n /** @type {CollectionEvent} */ (\n new CollectionEvent(CollectionEventType.REMOVE, prev, index)\n )\n );\n this.dispatchEvent(\n /** @type {CollectionEvent} */ (\n new CollectionEvent(CollectionEventType.ADD, elem, index)\n )\n );\n }\n\n /**\n * @private\n */\n updateLength_() {\n this.set(Property.LENGTH, this.array_.length);\n }\n\n /**\n * @private\n * @param {T} elem Element.\n * @param {number} [except] Optional index to ignore.\n */\n assertUnique_(elem, except) {\n for (let i = 0, ii = this.array_.length; i < ii; ++i) {\n if (this.array_[i] === elem && i !== except) {\n throw new AssertionError(58);\n }\n }\n }\n}\n\nexport default Collection;\n","/**\n * @module ol/TileState\n */\n\n/**\n * @enum {number}\n */\nexport default {\n IDLE: 0,\n LOADING: 1,\n LOADED: 2,\n /**\n * Indicates that tile loading failed\n * @type {number}\n */\n ERROR: 3,\n EMPTY: 4,\n};\n","/**\n * @module ol/easing\n */\n\n/**\n * Start slow and speed up.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function easeIn(t) {\n return Math.pow(t, 3);\n}\n\n/**\n * Start fast and slow down.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function easeOut(t) {\n return 1 - easeIn(1 - t);\n}\n\n/**\n * Start slow, speed up, and then slow down again.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function inAndOut(t) {\n return 3 * t * t - 2 * t * t * t;\n}\n\n/**\n * Maintain a constant speed over time.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function linear(t) {\n return t;\n}\n\n/**\n * Start slow, speed up, and at the very end slow down again. This has the\n * same general behavior as {@link module:ol/easing.inAndOut}, but the final\n * slowdown is delayed.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function upAndDown(t) {\n if (t < 0.5) {\n return inAndOut(2 * t);\n }\n return 1 - inAndOut(2 * (t - 0.5));\n}\n","/**\n * @module ol/Tile\n */\nimport EventTarget from './events/Target.js';\nimport EventType from './events/EventType.js';\nimport TileState from './TileState.js';\nimport {abstract} from './util.js';\nimport {easeIn} from './easing.js';\n\n/**\n * A function that takes an {@link module:ol/Tile~Tile} for the tile and a\n * `{string}` for the url as arguments. The default is\n * ```js\n * source.setTileLoadFunction(function(tile, src) {\n * tile.getImage().src = src;\n * });\n * ```\n * For more fine grained control, the load function can use fetch or XMLHttpRequest and involve\n * error handling:\n *\n * ```js\n * import TileState from 'ol/TileState.js';\n *\n * source.setTileLoadFunction(function(tile, src) {\n * const xhr = new XMLHttpRequest();\n * xhr.responseType = 'blob';\n * xhr.addEventListener('loadend', function (evt) {\n * const data = this.response;\n * if (data !== undefined) {\n * tile.getImage().src = URL.createObjectURL(data);\n * } else {\n * tile.setState(TileState.ERROR);\n * }\n * });\n * xhr.addEventListener('error', function () {\n * tile.setState(TileState.ERROR);\n * });\n * xhr.open('GET', src);\n * xhr.send();\n * });\n * ```\n *\n * @typedef {function(Tile, string): void} LoadFunction\n * @api\n */\n\n/**\n * {@link module:ol/source/Tile~TileSource} sources use a function of this type to get\n * the url that provides a tile for a given tile coordinate.\n *\n * This function takes an {@link module:ol/tilecoord~TileCoord} for the tile\n * coordinate, a `{number}` representing the pixel ratio and a\n * {@link module:ol/proj/Projection~Projection} for the projection as arguments\n * and returns a `{string}` representing the tile URL, or undefined if no tile\n * should be requested for the passed tile coordinate.\n *\n * @typedef {function(import(\"./tilecoord.js\").TileCoord, number,\n * import(\"./proj/Projection.js\").default): (string|undefined)} UrlFunction\n * @api\n */\n\n/**\n * @typedef {Object} Options\n * @property {number} [transition=250] A duration for tile opacity\n * transitions in milliseconds. A duration of 0 disables the opacity transition.\n * @property {boolean} [interpolate=false] Use interpolated values when resampling. By default,\n * the nearest neighbor is used when resampling.\n * @api\n */\n\n/**\n * @classdesc\n * Base class for tiles.\n *\n * @abstract\n */\nclass Tile extends EventTarget {\n /**\n * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {import(\"./TileState.js\").default} state State.\n * @param {Options} [options] Tile options.\n */\n constructor(tileCoord, state, options) {\n super();\n\n options = options ? options : {};\n\n /**\n * @type {import(\"./tilecoord.js\").TileCoord}\n */\n this.tileCoord = tileCoord;\n\n /**\n * @protected\n * @type {import(\"./TileState.js\").default}\n */\n this.state = state;\n\n /**\n * An \"interim\" tile for this tile. The interim tile may be used while this\n * one is loading, for \"smooth\" transitions when changing params/dimensions\n * on the source.\n * @type {Tile}\n */\n this.interimTile = null;\n\n /**\n * A key assigned to the tile. This is used by the tile source to determine\n * if this tile can effectively be used, or if a new tile should be created\n * and this one be used as an interim tile for this new tile.\n * @type {string}\n */\n this.key = '';\n\n /**\n * The duration for the opacity transition.\n * @type {number}\n */\n this.transition_ =\n options.transition === undefined ? 250 : options.transition;\n\n /**\n * Lookup of start times for rendering transitions. If the start time is\n * equal to -1, the transition is complete.\n * @type {Object}\n */\n this.transitionStarts_ = {};\n\n /**\n * @type {boolean}\n */\n this.interpolate = !!options.interpolate;\n }\n\n /**\n * @protected\n */\n changed() {\n this.dispatchEvent(EventType.CHANGE);\n }\n\n /**\n * Called by the tile cache when the tile is removed from the cache due to expiry\n */\n release() {\n if (this.state === TileState.ERROR) {\n // to remove the `change` listener on this tile in `ol/TileQueue#handleTileChange`\n this.setState(TileState.EMPTY);\n }\n }\n\n /**\n * @return {string} Key.\n */\n getKey() {\n return this.key + '/' + this.tileCoord;\n }\n\n /**\n * Get the interim tile most suitable for rendering using the chain of interim\n * tiles. This corresponds to the most recent tile that has been loaded, if no\n * such tile exists, the original tile is returned.\n * @return {!Tile} Best tile for rendering.\n */\n getInterimTile() {\n if (!this.interimTile) {\n //empty chain\n return this;\n }\n let tile = this.interimTile;\n\n // find the first loaded tile and return it. Since the chain is sorted in\n // decreasing order of creation time, there is no need to search the remainder\n // of the list (all those tiles correspond to older requests and will be\n // cleaned up by refreshInterimChain)\n do {\n if (tile.getState() == TileState.LOADED) {\n // Show tile immediately instead of fading it in after loading, because\n // the interim tile is in place already\n this.transition_ = 0;\n return tile;\n }\n tile = tile.interimTile;\n } while (tile);\n\n // we can not find a better tile\n return this;\n }\n\n /**\n * Goes through the chain of interim tiles and discards sections of the chain\n * that are no longer relevant.\n */\n refreshInterimChain() {\n if (!this.interimTile) {\n return;\n }\n\n let tile = this.interimTile;\n\n /**\n * @type {Tile}\n */\n let prev = this;\n\n do {\n if (tile.getState() == TileState.LOADED) {\n //we have a loaded tile, we can discard the rest of the list\n //we would could abort any LOADING tile request\n //older than this tile (i.e. any LOADING tile following this entry in the chain)\n tile.interimTile = null;\n break;\n } else if (tile.getState() == TileState.LOADING) {\n //keep this LOADING tile any loaded tiles later in the chain are\n //older than this tile, so we're still interested in the request\n prev = tile;\n } else if (tile.getState() == TileState.IDLE) {\n //the head of the list is the most current tile, we don't need\n //to start any other requests for this chain\n prev.interimTile = tile.interimTile;\n } else {\n prev = tile;\n }\n tile = prev.interimTile;\n } while (tile);\n }\n\n /**\n * Get the tile coordinate for this tile.\n * @return {import(\"./tilecoord.js\").TileCoord} The tile coordinate.\n * @api\n */\n getTileCoord() {\n return this.tileCoord;\n }\n\n /**\n * @return {import(\"./TileState.js\").default} State.\n */\n getState() {\n return this.state;\n }\n\n /**\n * Sets the state of this tile. If you write your own {@link module:ol/Tile~LoadFunction tileLoadFunction} ,\n * it is important to set the state correctly to {@link module:ol/TileState~ERROR}\n * when the tile cannot be loaded. Otherwise the tile cannot be removed from\n * the tile queue and will block other requests.\n * @param {import(\"./TileState.js\").default} state State.\n * @api\n */\n setState(state) {\n if (this.state !== TileState.ERROR && this.state > state) {\n throw new Error('Tile load sequence violation');\n }\n this.state = state;\n this.changed();\n }\n\n /**\n * Load the image or retry if loading previously failed.\n * Loading is taken care of by the tile queue, and calling this method is\n * only needed for preloading or for reloading in case of an error.\n * @abstract\n * @api\n */\n load() {\n abstract();\n }\n\n /**\n * Get the alpha value for rendering.\n * @param {string} id An id for the renderer.\n * @param {number} time The render frame time.\n * @return {number} A number between 0 and 1.\n */\n getAlpha(id, time) {\n if (!this.transition_) {\n return 1;\n }\n\n let start = this.transitionStarts_[id];\n if (!start) {\n start = time;\n this.transitionStarts_[id] = start;\n } else if (start === -1) {\n return 1;\n }\n\n const delta = time - start + 1000 / 60; // avoid rendering at 0\n if (delta >= this.transition_) {\n return 1;\n }\n return easeIn(delta / this.transition_);\n }\n\n /**\n * Determine if a tile is in an alpha transition. A tile is considered in\n * transition if tile.getAlpha() has not yet been called or has been called\n * and returned 1.\n * @param {string} id An id for the renderer.\n * @return {boolean} The tile is in transition.\n */\n inTransition(id) {\n if (!this.transition_) {\n return false;\n }\n return this.transitionStarts_[id] !== -1;\n }\n\n /**\n * Mark a transition as complete.\n * @param {string} id An id for the renderer.\n */\n endTransition(id) {\n if (this.transition_) {\n this.transitionStarts_[id] = -1;\n }\n }\n}\n\nexport default Tile;\n","/**\n * @module ol/has\n */\n\nconst ua =\n typeof navigator !== 'undefined' && typeof navigator.userAgent !== 'undefined'\n ? navigator.userAgent.toLowerCase()\n : '';\n\n/**\n * User agent string says we are dealing with Firefox as browser.\n * @type {boolean}\n */\nexport const FIREFOX = ua.includes('firefox');\n\n/**\n * User agent string says we are dealing with Safari as browser.\n * @type {boolean}\n */\nexport const SAFARI = ua.includes('safari') && !ua.includes('chrom');\n\n/**\n * https://bugs.webkit.org/show_bug.cgi?id=237906\n * @type {boolean}\n */\nexport const SAFARI_BUG_237906 =\n SAFARI &&\n (ua.includes('version/15.4') ||\n /cpu (os|iphone os) 15_4 like mac os x/.test(ua));\n\n/**\n * User agent string says we are dealing with a WebKit engine.\n * @type {boolean}\n */\nexport const WEBKIT = ua.includes('webkit') && !ua.includes('edge');\n\n/**\n * User agent string says we are dealing with a Mac as platform.\n * @type {boolean}\n */\nexport const MAC = ua.includes('macintosh');\n\n/**\n * The ratio between physical pixels and device-independent pixels\n * (dips) on the device (`window.devicePixelRatio`).\n * @const\n * @type {number}\n * @api\n */\nexport const DEVICE_PIXEL_RATIO =\n typeof devicePixelRatio !== 'undefined' ? devicePixelRatio : 1;\n\n/**\n * The execution context is a worker with OffscreenCanvas available.\n * @const\n * @type {boolean}\n */\nexport const WORKER_OFFSCREEN_CANVAS =\n typeof WorkerGlobalScope !== 'undefined' &&\n typeof OffscreenCanvas !== 'undefined' &&\n self instanceof WorkerGlobalScope; //eslint-disable-line\n\n/**\n * Image.prototype.decode() is supported.\n * @type {boolean}\n */\nexport const IMAGE_DECODE =\n typeof Image !== 'undefined' && Image.prototype.decode;\n\n/**\n * @type {boolean}\n */\nexport const PASSIVE_EVENT_LISTENERS = (function () {\n let passive = false;\n try {\n const options = Object.defineProperty({}, 'passive', {\n get: function () {\n passive = true;\n },\n });\n\n window.addEventListener('_', null, options);\n window.removeEventListener('_', null, options);\n } catch (error) {\n // passive not supported\n }\n return passive;\n})();\n","import {WORKER_OFFSCREEN_CANVAS} from './has.js';\n\n/**\n * @module ol/dom\n */\n\n//FIXME Move this function to the canvas module\n/**\n * Create an html canvas element and returns its 2d context.\n * @param {number} [width] Canvas width.\n * @param {number} [height] Canvas height.\n * @param {Array} [canvasPool] Canvas pool to take existing canvas from.\n * @param {CanvasRenderingContext2DSettings} [settings] CanvasRenderingContext2DSettings\n * @return {CanvasRenderingContext2D} The context.\n */\nexport function createCanvasContext2D(width, height, canvasPool, settings) {\n /** @type {HTMLCanvasElement|OffscreenCanvas} */\n let canvas;\n if (canvasPool && canvasPool.length) {\n canvas = canvasPool.shift();\n } else if (WORKER_OFFSCREEN_CANVAS) {\n canvas = new OffscreenCanvas(width || 300, height || 300);\n } else {\n canvas = document.createElement('canvas');\n }\n if (width) {\n canvas.width = width;\n }\n if (height) {\n canvas.height = height;\n }\n //FIXME Allow OffscreenCanvasRenderingContext2D as return type\n return /** @type {CanvasRenderingContext2D} */ (\n canvas.getContext('2d', settings)\n );\n}\n\n/**\n * Releases canvas memory to avoid exceeding memory limits in Safari.\n * See https://pqina.nl/blog/total-canvas-memory-use-exceeds-the-maximum-limit/\n * @param {CanvasRenderingContext2D} context Context.\n */\nexport function releaseCanvas(context) {\n const canvas = context.canvas;\n canvas.width = 1;\n canvas.height = 1;\n context.clearRect(0, 0, 1, 1);\n}\n\n/**\n * Get the current computed width for the given element including margin,\n * padding and border.\n * Equivalent to jQuery's `$(el).outerWidth(true)`.\n * @param {!HTMLElement} element Element.\n * @return {number} The width.\n */\nexport function outerWidth(element) {\n let width = element.offsetWidth;\n const style = getComputedStyle(element);\n width += parseInt(style.marginLeft, 10) + parseInt(style.marginRight, 10);\n\n return width;\n}\n\n/**\n * Get the current computed height for the given element including margin,\n * padding and border.\n * Equivalent to jQuery's `$(el).outerHeight(true)`.\n * @param {!HTMLElement} element Element.\n * @return {number} The height.\n */\nexport function outerHeight(element) {\n let height = element.offsetHeight;\n const style = getComputedStyle(element);\n height += parseInt(style.marginTop, 10) + parseInt(style.marginBottom, 10);\n\n return height;\n}\n\n/**\n * @param {Node} newNode Node to replace old node\n * @param {Node} oldNode The node to be replaced\n */\nexport function replaceNode(newNode, oldNode) {\n const parent = oldNode.parentNode;\n if (parent) {\n parent.replaceChild(newNode, oldNode);\n }\n}\n\n/**\n * @param {Node} node The node to remove.\n * @return {Node|null} The node that was removed or null.\n */\nexport function removeNode(node) {\n return node && node.parentNode ? node.parentNode.removeChild(node) : null;\n}\n\n/**\n * @param {Node} node The node to remove the children from.\n */\nexport function removeChildren(node) {\n while (node.lastChild) {\n node.removeChild(node.lastChild);\n }\n}\n\n/**\n * Transform the children of a parent node so they match the\n * provided list of children. This function aims to efficiently\n * remove, add, and reorder child nodes while maintaining a simple\n * implementation (it is not guaranteed to minimize DOM operations).\n * @param {Node} node The parent node whose children need reworking.\n * @param {Array} children The desired children.\n */\nexport function replaceChildren(node, children) {\n const oldChildren = node.childNodes;\n\n for (let i = 0; true; ++i) {\n const oldChild = oldChildren[i];\n const newChild = children[i];\n\n // check if our work is done\n if (!oldChild && !newChild) {\n break;\n }\n\n // check if children match\n if (oldChild === newChild) {\n continue;\n }\n\n // check if a new child needs to be added\n if (!oldChild) {\n node.appendChild(newChild);\n continue;\n }\n\n // check if an old child needs to be removed\n if (!newChild) {\n node.removeChild(oldChild);\n --i;\n continue;\n }\n\n // reorder\n node.insertBefore(newChild, oldChild);\n }\n}\n","/**\n * @module ol/DataTile\n */\nimport Tile from './Tile.js';\nimport TileState from './TileState.js';\nimport {createCanvasContext2D} from './dom.js';\n\n/**\n * @typedef {HTMLImageElement|HTMLCanvasElement|HTMLVideoElement} ImageLike\n */\n\n/**\n * @typedef {Uint8Array|Uint8ClampedArray|Float32Array|DataView} ArrayLike\n */\n\n/**\n * Data that can be used with a DataTile.\n * @typedef {ArrayLike|ImageLike} Data\n */\n\n/**\n * @param {Data} data Tile data.\n * @return {ImageLike|null} The image-like data.\n */\nexport function asImageLike(data) {\n return data instanceof Image ||\n data instanceof HTMLCanvasElement ||\n data instanceof HTMLVideoElement\n ? data\n : null;\n}\n\n/**\n * @param {Data} data Tile data.\n * @return {ArrayLike|null} The array-like data.\n */\nexport function asArrayLike(data) {\n return data instanceof Uint8Array ||\n data instanceof Uint8ClampedArray ||\n data instanceof Float32Array ||\n data instanceof DataView\n ? data\n : null;\n}\n\n/**\n * @type {CanvasRenderingContext2D|null}\n */\nlet sharedContext = null;\n\n/**\n * @param {ImageLike} image The image.\n * @return {Uint8ClampedArray} The data.\n */\nexport function toArray(image) {\n if (!sharedContext) {\n sharedContext = createCanvasContext2D(\n image.width,\n image.height,\n undefined,\n {willReadFrequently: true}\n );\n }\n const canvas = sharedContext.canvas;\n const width = image.width;\n if (canvas.width !== width) {\n canvas.width = width;\n }\n const height = image.height;\n if (canvas.height !== height) {\n canvas.height = height;\n }\n sharedContext.drawImage(image, width, height);\n return sharedContext.getImageData(0, 0, width, height).data;\n}\n\n/**\n * @type {import('./size.js').Size}\n */\nconst defaultSize = [256, 256];\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @property {function(): Promise} loader Data loader. For loaders that generate images,\n * the promise should not resolve until the image is loaded.\n * @property {number} [transition=250] A duration for tile opacity\n * transitions in milliseconds. A duration of 0 disables the opacity transition.\n * @property {boolean} [interpolate=false] Use interpolated values when resampling. By default,\n * the nearest neighbor is used when resampling.\n * @property {import('./size.js').Size} [size=[256, 256]] Tile size.\n * @api\n */\n\nclass DataTile extends Tile {\n /**\n * @param {Options} options Tile options.\n */\n constructor(options) {\n const state = TileState.IDLE;\n\n super(options.tileCoord, state, {\n transition: options.transition,\n interpolate: options.interpolate,\n });\n\n /**\n * @type {function(): Promise}\n * @private\n */\n this.loader_ = options.loader;\n\n /**\n * @type {Data}\n * @private\n */\n this.data_ = null;\n\n /**\n * @type {Error}\n * @private\n */\n this.error_ = null;\n\n /**\n * @type {import('./size.js').Size|null}\n * @private\n */\n this.size_ = options.size || null;\n }\n\n /**\n * Get the tile size.\n * @return {import('./size.js').Size} Tile size.\n */\n getSize() {\n if (this.size_) {\n return this.size_;\n }\n const imageData = asImageLike(this.data_);\n if (imageData) {\n return [imageData.width, imageData.height];\n }\n return defaultSize;\n }\n\n /**\n * Get the data for the tile.\n * @return {Data} Tile data.\n * @api\n */\n getData() {\n return this.data_;\n }\n\n /**\n * Get any loading error.\n * @return {Error} Loading error.\n * @api\n */\n getError() {\n return this.error_;\n }\n\n /**\n * Load not yet loaded URI.\n * @api\n */\n load() {\n if (this.state !== TileState.IDLE && this.state !== TileState.ERROR) {\n return;\n }\n this.state = TileState.LOADING;\n this.changed();\n\n const self = this;\n this.loader_()\n .then(function (data) {\n self.data_ = data;\n self.state = TileState.LOADED;\n self.changed();\n })\n .catch(function (error) {\n self.error_ = error;\n self.state = TileState.ERROR;\n self.changed();\n });\n }\n}\n\nexport default DataTile;\n","/**\n * @module ol/asserts\n */\nimport AssertionError from './AssertionError.js';\n\n/**\n * @param {*} assertion Assertion we expected to be truthy.\n * @param {number} errorCode Error code.\n */\nexport function assert(assertion, errorCode) {\n if (!assertion) {\n throw new AssertionError(errorCode);\n }\n}\n","/**\n * @module ol/Feature\n */\nimport BaseObject from './Object.js';\nimport EventType from './events/EventType.js';\nimport {assert} from './asserts.js';\nimport {listen, unlistenByKey} from './events.js';\n\n/**\n * @typedef {typeof Feature|typeof import(\"./render/Feature.js\").default} FeatureClass\n */\n\n/**\n * @typedef {Feature|import(\"./render/Feature.js\").default} FeatureLike\n */\n\n/***\n * @template Return\n * @typedef {import(\"./Observable\").OnSignature &\n * import(\"./Observable\").OnSignature &\n * import(\"./Observable\").CombinedOnSignature} FeatureOnSignature\n */\n\n/***\n * @template Geometry\n * @typedef {Object & { geometry?: Geometry }} ObjectWithGeometry\n */\n\n/**\n * @classdesc\n * A vector object for geographic features with a geometry and other\n * attribute properties, similar to the features in vector file formats like\n * GeoJSON.\n *\n * Features can be styled individually with `setStyle`; otherwise they use the\n * style of their vector layer.\n *\n * Note that attribute properties are set as {@link module:ol/Object~BaseObject} properties on\n * the feature object, so they are observable, and have get/set accessors.\n *\n * Typically, a feature has a single geometry property. You can set the\n * geometry using the `setGeometry` method and get it with `getGeometry`.\n * It is possible to store more than one geometry on a feature using attribute\n * properties. By default, the geometry used for rendering is identified by\n * the property name `geometry`. If you want to use another geometry property\n * for rendering, use the `setGeometryName` method to change the attribute\n * property associated with the geometry for the feature. For example:\n *\n * ```js\n *\n * import Feature from 'ol/Feature.js';\n * import Polygon from 'ol/geom/Polygon.js';\n * import Point from 'ol/geom/Point.js';\n *\n * const feature = new Feature({\n * geometry: new Polygon(polyCoords),\n * labelPoint: new Point(labelCoords),\n * name: 'My Polygon',\n * });\n *\n * // get the polygon geometry\n * const poly = feature.getGeometry();\n *\n * // Render the feature as a point using the coordinates from labelPoint\n * feature.setGeometryName('labelPoint');\n *\n * // get the point geometry\n * const point = feature.getGeometry();\n * ```\n *\n * @api\n * @template {import(\"./geom/Geometry.js\").default} [Geometry=import(\"./geom/Geometry.js\").default]\n */\nclass Feature extends BaseObject {\n /**\n * @param {Geometry|ObjectWithGeometry} [geometryOrProperties]\n * You may pass a Geometry object directly, or an object literal containing\n * properties. If you pass an object literal, you may include a Geometry\n * associated with a `geometry` key.\n */\n constructor(geometryOrProperties) {\n super();\n\n /***\n * @type {FeatureOnSignature}\n */\n this.on;\n\n /***\n * @type {FeatureOnSignature}\n */\n this.once;\n\n /***\n * @type {FeatureOnSignature}\n */\n this.un;\n\n /**\n * @private\n * @type {number|string|undefined}\n */\n this.id_ = undefined;\n\n /**\n * @type {string}\n * @private\n */\n this.geometryName_ = 'geometry';\n\n /**\n * User provided style.\n * @private\n * @type {import(\"./style/Style.js\").StyleLike}\n */\n this.style_ = null;\n\n /**\n * @private\n * @type {import(\"./style/Style.js\").StyleFunction|undefined}\n */\n this.styleFunction_ = undefined;\n\n /**\n * @private\n * @type {?import(\"./events.js\").EventsKey}\n */\n this.geometryChangeKey_ = null;\n\n this.addChangeListener(this.geometryName_, this.handleGeometryChanged_);\n\n if (geometryOrProperties) {\n if (\n typeof (\n /** @type {?} */ (geometryOrProperties).getSimplifiedGeometry\n ) === 'function'\n ) {\n const geometry = /** @type {Geometry} */ (geometryOrProperties);\n this.setGeometry(geometry);\n } else {\n /** @type {Object} */\n const properties = geometryOrProperties;\n this.setProperties(properties);\n }\n }\n }\n\n /**\n * Clone this feature. If the original feature has a geometry it\n * is also cloned. The feature id is not set in the clone.\n * @return {Feature} The clone.\n * @api\n */\n clone() {\n const clone = /** @type {Feature} */ (\n new Feature(this.hasProperties() ? this.getProperties() : null)\n );\n clone.setGeometryName(this.getGeometryName());\n const geometry = this.getGeometry();\n if (geometry) {\n clone.setGeometry(/** @type {Geometry} */ (geometry.clone()));\n }\n const style = this.getStyle();\n if (style) {\n clone.setStyle(style);\n }\n return clone;\n }\n\n /**\n * Get the feature's default geometry. A feature may have any number of named\n * geometries. The \"default\" geometry (the one that is rendered by default) is\n * set when calling {@link module:ol/Feature~Feature#setGeometry}.\n * @return {Geometry|undefined} The default geometry for the feature.\n * @api\n * @observable\n */\n getGeometry() {\n return /** @type {Geometry|undefined} */ (this.get(this.geometryName_));\n }\n\n /**\n * Get the feature identifier. This is a stable identifier for the feature and\n * is either set when reading data from a remote source or set explicitly by\n * calling {@link module:ol/Feature~Feature#setId}.\n * @return {number|string|undefined} Id.\n * @api\n */\n getId() {\n return this.id_;\n }\n\n /**\n * Get the name of the feature's default geometry. By default, the default\n * geometry is named `geometry`.\n * @return {string} Get the property name associated with the default geometry\n * for this feature.\n * @api\n */\n getGeometryName() {\n return this.geometryName_;\n }\n\n /**\n * Get the feature's style. Will return what was provided to the\n * {@link module:ol/Feature~Feature#setStyle} method.\n * @return {import(\"./style/Style.js\").StyleLike|undefined} The feature style.\n * @api\n */\n getStyle() {\n return this.style_;\n }\n\n /**\n * Get the feature's style function.\n * @return {import(\"./style/Style.js\").StyleFunction|undefined} Return a function\n * representing the current style of this feature.\n * @api\n */\n getStyleFunction() {\n return this.styleFunction_;\n }\n\n /**\n * @private\n */\n handleGeometryChange_() {\n this.changed();\n }\n\n /**\n * @private\n */\n handleGeometryChanged_() {\n if (this.geometryChangeKey_) {\n unlistenByKey(this.geometryChangeKey_);\n this.geometryChangeKey_ = null;\n }\n const geometry = this.getGeometry();\n if (geometry) {\n this.geometryChangeKey_ = listen(\n geometry,\n EventType.CHANGE,\n this.handleGeometryChange_,\n this\n );\n }\n this.changed();\n }\n\n /**\n * Set the default geometry for the feature. This will update the property\n * with the name returned by {@link module:ol/Feature~Feature#getGeometryName}.\n * @param {Geometry|undefined} geometry The new geometry.\n * @api\n * @observable\n */\n setGeometry(geometry) {\n this.set(this.geometryName_, geometry);\n }\n\n /**\n * Set the style for the feature to override the layer style. This can be a\n * single style object, an array of styles, or a function that takes a\n * resolution and returns an array of styles. To unset the feature style, call\n * `setStyle()` without arguments or a falsey value.\n * @param {import(\"./style/Style.js\").StyleLike} [style] Style for this feature.\n * @api\n * @fires module:ol/events/Event~BaseEvent#event:change\n */\n setStyle(style) {\n this.style_ = style;\n this.styleFunction_ = !style ? undefined : createStyleFunction(style);\n this.changed();\n }\n\n /**\n * Set the feature id. The feature id is considered stable and may be used when\n * requesting features or comparing identifiers returned from a remote source.\n * The feature id can be used with the\n * {@link module:ol/source/Vector~VectorSource#getFeatureById} method.\n * @param {number|string|undefined} id The feature id.\n * @api\n * @fires module:ol/events/Event~BaseEvent#event:change\n */\n setId(id) {\n this.id_ = id;\n this.changed();\n }\n\n /**\n * Set the property name to be used when getting the feature's default geometry.\n * When calling {@link module:ol/Feature~Feature#getGeometry}, the value of the property with\n * this name will be returned.\n * @param {string} name The property name of the default geometry.\n * @api\n */\n setGeometryName(name) {\n this.removeChangeListener(this.geometryName_, this.handleGeometryChanged_);\n this.geometryName_ = name;\n this.addChangeListener(this.geometryName_, this.handleGeometryChanged_);\n this.handleGeometryChanged_();\n }\n}\n\n/**\n * Convert the provided object into a feature style function. Functions passed\n * through unchanged. Arrays of Style or single style objects wrapped\n * in a new feature style function.\n * @param {!import(\"./style/Style.js\").StyleFunction|!Array|!import(\"./style/Style.js\").default} obj\n * A feature style function, a single style, or an array of styles.\n * @return {import(\"./style/Style.js\").StyleFunction} A style function.\n */\nexport function createStyleFunction(obj) {\n if (typeof obj === 'function') {\n return obj;\n }\n /**\n * @type {Array}\n */\n let styles;\n if (Array.isArray(obj)) {\n styles = obj;\n } else {\n assert(typeof (/** @type {?} */ (obj).getZIndex) === 'function', 41); // Expected an `import(\"./style/Style.js\").Style` or an array of `import(\"./style/Style.js\").Style`\n const style = /** @type {import(\"./style/Style.js\").default} */ (obj);\n styles = [style];\n }\n return function () {\n return styles;\n };\n}\nexport default Feature;\n","/**\n * @module ol/transform\n */\nimport {WORKER_OFFSCREEN_CANVAS} from './has.js';\nimport {assert} from './asserts.js';\n\n/**\n * An array representing an affine 2d transformation for use with\n * {@link module:ol/transform} functions. The array has 6 elements.\n * @typedef {!Array} Transform\n * @api\n */\n\n/**\n * Collection of affine 2d transformation functions. The functions work on an\n * array of 6 elements. The element order is compatible with the [SVGMatrix\n * interface](https://developer.mozilla.org/en-US/docs/Web/API/SVGMatrix) and is\n * a subset (elements a to f) of a 3×3 matrix:\n * ```\n * [ a c e ]\n * [ b d f ]\n * [ 0 0 1 ]\n * ```\n */\n\n/**\n * @private\n * @type {Transform}\n */\nconst tmp_ = new Array(6);\n\n/**\n * Create an identity transform.\n * @return {!Transform} Identity transform.\n */\nexport function create() {\n return [1, 0, 0, 1, 0, 0];\n}\n\n/**\n * Resets the given transform to an identity transform.\n * @param {!Transform} transform Transform.\n * @return {!Transform} Transform.\n */\nexport function reset(transform) {\n return set(transform, 1, 0, 0, 1, 0, 0);\n}\n\n/**\n * Multiply the underlying matrices of two transforms and return the result in\n * the first transform.\n * @param {!Transform} transform1 Transform parameters of matrix 1.\n * @param {!Transform} transform2 Transform parameters of matrix 2.\n * @return {!Transform} transform1 multiplied with transform2.\n */\nexport function multiply(transform1, transform2) {\n const a1 = transform1[0];\n const b1 = transform1[1];\n const c1 = transform1[2];\n const d1 = transform1[3];\n const e1 = transform1[4];\n const f1 = transform1[5];\n const a2 = transform2[0];\n const b2 = transform2[1];\n const c2 = transform2[2];\n const d2 = transform2[3];\n const e2 = transform2[4];\n const f2 = transform2[5];\n\n transform1[0] = a1 * a2 + c1 * b2;\n transform1[1] = b1 * a2 + d1 * b2;\n transform1[2] = a1 * c2 + c1 * d2;\n transform1[3] = b1 * c2 + d1 * d2;\n transform1[4] = a1 * e2 + c1 * f2 + e1;\n transform1[5] = b1 * e2 + d1 * f2 + f1;\n\n return transform1;\n}\n\n/**\n * Set the transform components a-f on a given transform.\n * @param {!Transform} transform Transform.\n * @param {number} a The a component of the transform.\n * @param {number} b The b component of the transform.\n * @param {number} c The c component of the transform.\n * @param {number} d The d component of the transform.\n * @param {number} e The e component of the transform.\n * @param {number} f The f component of the transform.\n * @return {!Transform} Matrix with transform applied.\n */\nexport function set(transform, a, b, c, d, e, f) {\n transform[0] = a;\n transform[1] = b;\n transform[2] = c;\n transform[3] = d;\n transform[4] = e;\n transform[5] = f;\n return transform;\n}\n\n/**\n * Set transform on one matrix from another matrix.\n * @param {!Transform} transform1 Matrix to set transform to.\n * @param {!Transform} transform2 Matrix to set transform from.\n * @return {!Transform} transform1 with transform from transform2 applied.\n */\nexport function setFromArray(transform1, transform2) {\n transform1[0] = transform2[0];\n transform1[1] = transform2[1];\n transform1[2] = transform2[2];\n transform1[3] = transform2[3];\n transform1[4] = transform2[4];\n transform1[5] = transform2[5];\n return transform1;\n}\n\n/**\n * Transforms the given coordinate with the given transform returning the\n * resulting, transformed coordinate. The coordinate will be modified in-place.\n *\n * @param {Transform} transform The transformation.\n * @param {import(\"./coordinate.js\").Coordinate|import(\"./pixel.js\").Pixel} coordinate The coordinate to transform.\n * @return {import(\"./coordinate.js\").Coordinate|import(\"./pixel.js\").Pixel} return coordinate so that operations can be\n * chained together.\n */\nexport function apply(transform, coordinate) {\n const x = coordinate[0];\n const y = coordinate[1];\n coordinate[0] = transform[0] * x + transform[2] * y + transform[4];\n coordinate[1] = transform[1] * x + transform[3] * y + transform[5];\n return coordinate;\n}\n\n/**\n * Applies rotation to the given transform.\n * @param {!Transform} transform Transform.\n * @param {number} angle Angle in radians.\n * @return {!Transform} The rotated transform.\n */\nexport function rotate(transform, angle) {\n const cos = Math.cos(angle);\n const sin = Math.sin(angle);\n return multiply(transform, set(tmp_, cos, sin, -sin, cos, 0, 0));\n}\n\n/**\n * Applies scale to a given transform.\n * @param {!Transform} transform Transform.\n * @param {number} x Scale factor x.\n * @param {number} y Scale factor y.\n * @return {!Transform} The scaled transform.\n */\nexport function scale(transform, x, y) {\n return multiply(transform, set(tmp_, x, 0, 0, y, 0, 0));\n}\n\n/**\n * Creates a scale transform.\n * @param {!Transform} target Transform to overwrite.\n * @param {number} x Scale factor x.\n * @param {number} y Scale factor y.\n * @return {!Transform} The scale transform.\n */\nexport function makeScale(target, x, y) {\n return set(target, x, 0, 0, y, 0, 0);\n}\n\n/**\n * Applies translation to the given transform.\n * @param {!Transform} transform Transform.\n * @param {number} dx Translation x.\n * @param {number} dy Translation y.\n * @return {!Transform} The translated transform.\n */\nexport function translate(transform, dx, dy) {\n return multiply(transform, set(tmp_, 1, 0, 0, 1, dx, dy));\n}\n\n/**\n * Creates a composite transform given an initial translation, scale, rotation, and\n * final translation (in that order only, not commutative).\n * @param {!Transform} transform The transform (will be modified in place).\n * @param {number} dx1 Initial translation x.\n * @param {number} dy1 Initial translation y.\n * @param {number} sx Scale factor x.\n * @param {number} sy Scale factor y.\n * @param {number} angle Rotation (in counter-clockwise radians).\n * @param {number} dx2 Final translation x.\n * @param {number} dy2 Final translation y.\n * @return {!Transform} The composite transform.\n */\nexport function compose(transform, dx1, dy1, sx, sy, angle, dx2, dy2) {\n const sin = Math.sin(angle);\n const cos = Math.cos(angle);\n transform[0] = sx * cos;\n transform[1] = sy * sin;\n transform[2] = -sx * sin;\n transform[3] = sy * cos;\n transform[4] = dx2 * sx * cos - dy2 * sx * sin + dx1;\n transform[5] = dx2 * sy * sin + dy2 * sy * cos + dy1;\n return transform;\n}\n\n/**\n * Creates a composite transform given an initial translation, scale, rotation, and\n * final translation (in that order only, not commutative). The resulting transform\n * string can be applied as `transform` property of an HTMLElement's style.\n * @param {number} dx1 Initial translation x.\n * @param {number} dy1 Initial translation y.\n * @param {number} sx Scale factor x.\n * @param {number} sy Scale factor y.\n * @param {number} angle Rotation (in counter-clockwise radians).\n * @param {number} dx2 Final translation x.\n * @param {number} dy2 Final translation y.\n * @return {string} The composite css transform.\n * @api\n */\nexport function composeCssTransform(dx1, dy1, sx, sy, angle, dx2, dy2) {\n return toString(compose(create(), dx1, dy1, sx, sy, angle, dx2, dy2));\n}\n\n/**\n * Invert the given transform.\n * @param {!Transform} source The source transform to invert.\n * @return {!Transform} The inverted (source) transform.\n */\nexport function invert(source) {\n return makeInverse(source, source);\n}\n\n/**\n * Invert the given transform.\n * @param {!Transform} target Transform to be set as the inverse of\n * the source transform.\n * @param {!Transform} source The source transform to invert.\n * @return {!Transform} The inverted (target) transform.\n */\nexport function makeInverse(target, source) {\n const det = determinant(source);\n assert(det !== 0, 32); // Transformation matrix cannot be inverted\n\n const a = source[0];\n const b = source[1];\n const c = source[2];\n const d = source[3];\n const e = source[4];\n const f = source[5];\n\n target[0] = d / det;\n target[1] = -b / det;\n target[2] = -c / det;\n target[3] = a / det;\n target[4] = (c * f - d * e) / det;\n target[5] = -(a * f - b * e) / det;\n\n return target;\n}\n\n/**\n * Returns the determinant of the given matrix.\n * @param {!Transform} mat Matrix.\n * @return {number} Determinant.\n */\nexport function determinant(mat) {\n return mat[0] * mat[3] - mat[1] * mat[2];\n}\n\n/**\n * @type {HTMLElement}\n * @private\n */\nlet transformStringDiv;\n\n/**\n * A rounded string version of the transform. This can be used\n * for CSS transforms.\n * @param {!Transform} mat Matrix.\n * @return {string} The transform as a string.\n */\nexport function toString(mat) {\n const transformString = 'matrix(' + mat.join(', ') + ')';\n if (WORKER_OFFSCREEN_CANVAS) {\n return transformString;\n }\n const node =\n transformStringDiv || (transformStringDiv = document.createElement('div'));\n node.style.transform = transformString;\n return node.style.transform;\n}\n","/**\n * @module ol/extent/Relationship\n */\n\n/**\n * Relationship to an extent.\n * @enum {number}\n */\nexport default {\n UNKNOWN: 0,\n INTERSECTING: 1,\n ABOVE: 2,\n RIGHT: 4,\n BELOW: 8,\n LEFT: 16,\n};\n","/**\n * @module ol/extent\n */\nimport Relationship from './extent/Relationship.js';\nimport {assert} from './asserts.js';\n\n/**\n * An array of numbers representing an extent: `[minx, miny, maxx, maxy]`.\n * @typedef {Array} Extent\n * @api\n */\n\n/**\n * Extent corner.\n * @typedef {'bottom-left' | 'bottom-right' | 'top-left' | 'top-right'} Corner\n */\n\n/**\n * Build an extent that includes all given coordinates.\n *\n * @param {Array} coordinates Coordinates.\n * @return {Extent} Bounding extent.\n * @api\n */\nexport function boundingExtent(coordinates) {\n const extent = createEmpty();\n for (let i = 0, ii = coordinates.length; i < ii; ++i) {\n extendCoordinate(extent, coordinates[i]);\n }\n return extent;\n}\n\n/**\n * @param {Array} xs Xs.\n * @param {Array} ys Ys.\n * @param {Extent} [dest] Destination extent.\n * @private\n * @return {Extent} Extent.\n */\nfunction _boundingExtentXYs(xs, ys, dest) {\n const minX = Math.min.apply(null, xs);\n const minY = Math.min.apply(null, ys);\n const maxX = Math.max.apply(null, xs);\n const maxY = Math.max.apply(null, ys);\n return createOrUpdate(minX, minY, maxX, maxY, dest);\n}\n\n/**\n * Return extent increased by the provided value.\n * @param {Extent} extent Extent.\n * @param {number} value The amount by which the extent should be buffered.\n * @param {Extent} [dest] Extent.\n * @return {Extent} Extent.\n * @api\n */\nexport function buffer(extent, value, dest) {\n if (dest) {\n dest[0] = extent[0] - value;\n dest[1] = extent[1] - value;\n dest[2] = extent[2] + value;\n dest[3] = extent[3] + value;\n return dest;\n }\n return [\n extent[0] - value,\n extent[1] - value,\n extent[2] + value,\n extent[3] + value,\n ];\n}\n\n/**\n * Creates a clone of an extent.\n *\n * @param {Extent} extent Extent to clone.\n * @param {Extent} [dest] Extent.\n * @return {Extent} The clone.\n */\nexport function clone(extent, dest) {\n if (dest) {\n dest[0] = extent[0];\n dest[1] = extent[1];\n dest[2] = extent[2];\n dest[3] = extent[3];\n return dest;\n }\n return extent.slice();\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {number} Closest squared distance.\n */\nexport function closestSquaredDistanceXY(extent, x, y) {\n let dx, dy;\n if (x < extent[0]) {\n dx = extent[0] - x;\n } else if (extent[2] < x) {\n dx = x - extent[2];\n } else {\n dx = 0;\n }\n if (y < extent[1]) {\n dy = extent[1] - y;\n } else if (extent[3] < y) {\n dy = y - extent[3];\n } else {\n dy = 0;\n }\n return dx * dx + dy * dy;\n}\n\n/**\n * Check if the passed coordinate is contained or on the edge of the extent.\n *\n * @param {Extent} extent Extent.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n * @return {boolean} The coordinate is contained in the extent.\n * @api\n */\nexport function containsCoordinate(extent, coordinate) {\n return containsXY(extent, coordinate[0], coordinate[1]);\n}\n\n/**\n * Check if one extent contains another.\n *\n * An extent is deemed contained if it lies completely within the other extent,\n * including if they share one or more edges.\n *\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @return {boolean} The second extent is contained by or on the edge of the\n * first.\n * @api\n */\nexport function containsExtent(extent1, extent2) {\n return (\n extent1[0] <= extent2[0] &&\n extent2[2] <= extent1[2] &&\n extent1[1] <= extent2[1] &&\n extent2[3] <= extent1[3]\n );\n}\n\n/**\n * Check if the passed coordinate is contained or on the edge of the extent.\n *\n * @param {Extent} extent Extent.\n * @param {number} x X coordinate.\n * @param {number} y Y coordinate.\n * @return {boolean} The x, y values are contained in the extent.\n * @api\n */\nexport function containsXY(extent, x, y) {\n return extent[0] <= x && x <= extent[2] && extent[1] <= y && y <= extent[3];\n}\n\n/**\n * Get the relationship between a coordinate and extent.\n * @param {Extent} extent The extent.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate The coordinate.\n * @return {import(\"./extent/Relationship.js\").default} The relationship (bitwise compare with\n * import(\"./extent/Relationship.js\").Relationship).\n */\nexport function coordinateRelationship(extent, coordinate) {\n const minX = extent[0];\n const minY = extent[1];\n const maxX = extent[2];\n const maxY = extent[3];\n const x = coordinate[0];\n const y = coordinate[1];\n let relationship = Relationship.UNKNOWN;\n if (x < minX) {\n relationship = relationship | Relationship.LEFT;\n } else if (x > maxX) {\n relationship = relationship | Relationship.RIGHT;\n }\n if (y < minY) {\n relationship = relationship | Relationship.BELOW;\n } else if (y > maxY) {\n relationship = relationship | Relationship.ABOVE;\n }\n if (relationship === Relationship.UNKNOWN) {\n relationship = Relationship.INTERSECTING;\n }\n return relationship;\n}\n\n/**\n * Create an empty extent.\n * @return {Extent} Empty extent.\n * @api\n */\nexport function createEmpty() {\n return [Infinity, Infinity, -Infinity, -Infinity];\n}\n\n/**\n * Create a new extent or update the provided extent.\n * @param {number} minX Minimum X.\n * @param {number} minY Minimum Y.\n * @param {number} maxX Maximum X.\n * @param {number} maxY Maximum Y.\n * @param {Extent} [dest] Destination extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdate(minX, minY, maxX, maxY, dest) {\n if (dest) {\n dest[0] = minX;\n dest[1] = minY;\n dest[2] = maxX;\n dest[3] = maxY;\n return dest;\n }\n return [minX, minY, maxX, maxY];\n}\n\n/**\n * Create a new empty extent or make the provided one empty.\n * @param {Extent} [dest] Extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdateEmpty(dest) {\n return createOrUpdate(Infinity, Infinity, -Infinity, -Infinity, dest);\n}\n\n/**\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {Extent} [dest] Extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdateFromCoordinate(coordinate, dest) {\n const x = coordinate[0];\n const y = coordinate[1];\n return createOrUpdate(x, y, x, y, dest);\n}\n\n/**\n * @param {Array} coordinates Coordinates.\n * @param {Extent} [dest] Extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdateFromCoordinates(coordinates, dest) {\n const extent = createOrUpdateEmpty(dest);\n return extendCoordinates(extent, coordinates);\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {Extent} [dest] Extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdateFromFlatCoordinates(\n flatCoordinates,\n offset,\n end,\n stride,\n dest\n) {\n const extent = createOrUpdateEmpty(dest);\n return extendFlatCoordinates(extent, flatCoordinates, offset, end, stride);\n}\n\n/**\n * @param {Array>} rings Rings.\n * @param {Extent} [dest] Extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdateFromRings(rings, dest) {\n const extent = createOrUpdateEmpty(dest);\n return extendRings(extent, rings);\n}\n\n/**\n * Determine if two extents are equivalent.\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @return {boolean} The two extents are equivalent.\n * @api\n */\nexport function equals(extent1, extent2) {\n return (\n extent1[0] == extent2[0] &&\n extent1[2] == extent2[2] &&\n extent1[1] == extent2[1] &&\n extent1[3] == extent2[3]\n );\n}\n\n/**\n * Determine if two extents are approximately equivalent.\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @param {number} tolerance Tolerance in extent coordinate units.\n * @return {boolean} The two extents differ by less than the tolerance.\n */\nexport function approximatelyEquals(extent1, extent2, tolerance) {\n return (\n Math.abs(extent1[0] - extent2[0]) < tolerance &&\n Math.abs(extent1[2] - extent2[2]) < tolerance &&\n Math.abs(extent1[1] - extent2[1]) < tolerance &&\n Math.abs(extent1[3] - extent2[3]) < tolerance\n );\n}\n\n/**\n * Modify an extent to include another extent.\n * @param {Extent} extent1 The extent to be modified.\n * @param {Extent} extent2 The extent that will be included in the first.\n * @return {Extent} A reference to the first (extended) extent.\n * @api\n */\nexport function extend(extent1, extent2) {\n if (extent2[0] < extent1[0]) {\n extent1[0] = extent2[0];\n }\n if (extent2[2] > extent1[2]) {\n extent1[2] = extent2[2];\n }\n if (extent2[1] < extent1[1]) {\n extent1[1] = extent2[1];\n }\n if (extent2[3] > extent1[3]) {\n extent1[3] = extent2[3];\n }\n return extent1;\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n */\nexport function extendCoordinate(extent, coordinate) {\n if (coordinate[0] < extent[0]) {\n extent[0] = coordinate[0];\n }\n if (coordinate[0] > extent[2]) {\n extent[2] = coordinate[0];\n }\n if (coordinate[1] < extent[1]) {\n extent[1] = coordinate[1];\n }\n if (coordinate[1] > extent[3]) {\n extent[3] = coordinate[1];\n }\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {Array} coordinates Coordinates.\n * @return {Extent} Extent.\n */\nexport function extendCoordinates(extent, coordinates) {\n for (let i = 0, ii = coordinates.length; i < ii; ++i) {\n extendCoordinate(extent, coordinates[i]);\n }\n return extent;\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {Extent} Extent.\n */\nexport function extendFlatCoordinates(\n extent,\n flatCoordinates,\n offset,\n end,\n stride\n) {\n for (; offset < end; offset += stride) {\n extendXY(extent, flatCoordinates[offset], flatCoordinates[offset + 1]);\n }\n return extent;\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {Array>} rings Rings.\n * @return {Extent} Extent.\n */\nexport function extendRings(extent, rings) {\n for (let i = 0, ii = rings.length; i < ii; ++i) {\n extendCoordinates(extent, rings[i]);\n }\n return extent;\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {number} x X.\n * @param {number} y Y.\n */\nexport function extendXY(extent, x, y) {\n extent[0] = Math.min(extent[0], x);\n extent[1] = Math.min(extent[1], y);\n extent[2] = Math.max(extent[2], x);\n extent[3] = Math.max(extent[3], y);\n}\n\n/**\n * This function calls `callback` for each corner of the extent. If the\n * callback returns a truthy value the function returns that value\n * immediately. Otherwise the function returns `false`.\n * @param {Extent} extent Extent.\n * @param {function(import(\"./coordinate.js\").Coordinate): S} callback Callback.\n * @return {S|boolean} Value.\n * @template S\n */\nexport function forEachCorner(extent, callback) {\n let val;\n val = callback(getBottomLeft(extent));\n if (val) {\n return val;\n }\n val = callback(getBottomRight(extent));\n if (val) {\n return val;\n }\n val = callback(getTopRight(extent));\n if (val) {\n return val;\n }\n val = callback(getTopLeft(extent));\n if (val) {\n return val;\n }\n return false;\n}\n\n/**\n * Get the size of an extent.\n * @param {Extent} extent Extent.\n * @return {number} Area.\n * @api\n */\nexport function getArea(extent) {\n let area = 0;\n if (!isEmpty(extent)) {\n area = getWidth(extent) * getHeight(extent);\n }\n return area;\n}\n\n/**\n * Get the bottom left coordinate of an extent.\n * @param {Extent} extent Extent.\n * @return {import(\"./coordinate.js\").Coordinate} Bottom left coordinate.\n * @api\n */\nexport function getBottomLeft(extent) {\n return [extent[0], extent[1]];\n}\n\n/**\n * Get the bottom right coordinate of an extent.\n * @param {Extent} extent Extent.\n * @return {import(\"./coordinate.js\").Coordinate} Bottom right coordinate.\n * @api\n */\nexport function getBottomRight(extent) {\n return [extent[2], extent[1]];\n}\n\n/**\n * Get the center coordinate of an extent.\n * @param {Extent} extent Extent.\n * @return {import(\"./coordinate.js\").Coordinate} Center.\n * @api\n */\nexport function getCenter(extent) {\n return [(extent[0] + extent[2]) / 2, (extent[1] + extent[3]) / 2];\n}\n\n/**\n * Get a corner coordinate of an extent.\n * @param {Extent} extent Extent.\n * @param {Corner} corner Corner.\n * @return {import(\"./coordinate.js\").Coordinate} Corner coordinate.\n */\nexport function getCorner(extent, corner) {\n let coordinate;\n if (corner === 'bottom-left') {\n coordinate = getBottomLeft(extent);\n } else if (corner === 'bottom-right') {\n coordinate = getBottomRight(extent);\n } else if (corner === 'top-left') {\n coordinate = getTopLeft(extent);\n } else if (corner === 'top-right') {\n coordinate = getTopRight(extent);\n } else {\n assert(false, 13); // Invalid corner\n }\n return coordinate;\n}\n\n/**\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @return {number} Enlarged area.\n */\nexport function getEnlargedArea(extent1, extent2) {\n const minX = Math.min(extent1[0], extent2[0]);\n const minY = Math.min(extent1[1], extent2[1]);\n const maxX = Math.max(extent1[2], extent2[2]);\n const maxY = Math.max(extent1[3], extent2[3]);\n return (maxX - minX) * (maxY - minY);\n}\n\n/**\n * @param {import(\"./coordinate.js\").Coordinate} center Center.\n * @param {number} resolution Resolution.\n * @param {number} rotation Rotation.\n * @param {import(\"./size.js\").Size} size Size.\n * @param {Extent} [dest] Destination extent.\n * @return {Extent} Extent.\n */\nexport function getForViewAndSize(center, resolution, rotation, size, dest) {\n const [x0, y0, x1, y1, x2, y2, x3, y3] = getRotatedViewport(\n center,\n resolution,\n rotation,\n size\n );\n return createOrUpdate(\n Math.min(x0, x1, x2, x3),\n Math.min(y0, y1, y2, y3),\n Math.max(x0, x1, x2, x3),\n Math.max(y0, y1, y2, y3),\n dest\n );\n}\n\n/**\n * @param {import(\"./coordinate.js\").Coordinate} center Center.\n * @param {number} resolution Resolution.\n * @param {number} rotation Rotation.\n * @param {import(\"./size.js\").Size} size Size.\n * @return {Array} Linear ring representing the viewport.\n */\nexport function getRotatedViewport(center, resolution, rotation, size) {\n const dx = (resolution * size[0]) / 2;\n const dy = (resolution * size[1]) / 2;\n const cosRotation = Math.cos(rotation);\n const sinRotation = Math.sin(rotation);\n const xCos = dx * cosRotation;\n const xSin = dx * sinRotation;\n const yCos = dy * cosRotation;\n const ySin = dy * sinRotation;\n const x = center[0];\n const y = center[1];\n return [\n x - xCos + ySin,\n y - xSin - yCos,\n x - xCos - ySin,\n y - xSin + yCos,\n x + xCos - ySin,\n y + xSin + yCos,\n x + xCos + ySin,\n y + xSin - yCos,\n x - xCos + ySin,\n y - xSin - yCos,\n ];\n}\n\n/**\n * Get the height of an extent.\n * @param {Extent} extent Extent.\n * @return {number} Height.\n * @api\n */\nexport function getHeight(extent) {\n return extent[3] - extent[1];\n}\n\n/**\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @return {number} Intersection area.\n */\nexport function getIntersectionArea(extent1, extent2) {\n const intersection = getIntersection(extent1, extent2);\n return getArea(intersection);\n}\n\n/**\n * Get the intersection of two extents.\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @param {Extent} [dest] Optional extent to populate with intersection.\n * @return {Extent} Intersecting extent.\n * @api\n */\nexport function getIntersection(extent1, extent2, dest) {\n const intersection = dest ? dest : createEmpty();\n if (intersects(extent1, extent2)) {\n if (extent1[0] > extent2[0]) {\n intersection[0] = extent1[0];\n } else {\n intersection[0] = extent2[0];\n }\n if (extent1[1] > extent2[1]) {\n intersection[1] = extent1[1];\n } else {\n intersection[1] = extent2[1];\n }\n if (extent1[2] < extent2[2]) {\n intersection[2] = extent1[2];\n } else {\n intersection[2] = extent2[2];\n }\n if (extent1[3] < extent2[3]) {\n intersection[3] = extent1[3];\n } else {\n intersection[3] = extent2[3];\n }\n } else {\n createOrUpdateEmpty(intersection);\n }\n return intersection;\n}\n\n/**\n * @param {Extent} extent Extent.\n * @return {number} Margin.\n */\nexport function getMargin(extent) {\n return getWidth(extent) + getHeight(extent);\n}\n\n/**\n * Get the size (width, height) of an extent.\n * @param {Extent} extent The extent.\n * @return {import(\"./size.js\").Size} The extent size.\n * @api\n */\nexport function getSize(extent) {\n return [extent[2] - extent[0], extent[3] - extent[1]];\n}\n\n/**\n * Get the top left coordinate of an extent.\n * @param {Extent} extent Extent.\n * @return {import(\"./coordinate.js\").Coordinate} Top left coordinate.\n * @api\n */\nexport function getTopLeft(extent) {\n return [extent[0], extent[3]];\n}\n\n/**\n * Get the top right coordinate of an extent.\n * @param {Extent} extent Extent.\n * @return {import(\"./coordinate.js\").Coordinate} Top right coordinate.\n * @api\n */\nexport function getTopRight(extent) {\n return [extent[2], extent[3]];\n}\n\n/**\n * Get the width of an extent.\n * @param {Extent} extent Extent.\n * @return {number} Width.\n * @api\n */\nexport function getWidth(extent) {\n return extent[2] - extent[0];\n}\n\n/**\n * Determine if one extent intersects another.\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent.\n * @return {boolean} The two extents intersect.\n * @api\n */\nexport function intersects(extent1, extent2) {\n return (\n extent1[0] <= extent2[2] &&\n extent1[2] >= extent2[0] &&\n extent1[1] <= extent2[3] &&\n extent1[3] >= extent2[1]\n );\n}\n\n/**\n * Determine if an extent is empty.\n * @param {Extent} extent Extent.\n * @return {boolean} Is empty.\n * @api\n */\nexport function isEmpty(extent) {\n return extent[2] < extent[0] || extent[3] < extent[1];\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {Extent} [dest] Extent.\n * @return {Extent} Extent.\n */\nexport function returnOrUpdate(extent, dest) {\n if (dest) {\n dest[0] = extent[0];\n dest[1] = extent[1];\n dest[2] = extent[2];\n dest[3] = extent[3];\n return dest;\n }\n return extent;\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {number} value Value.\n */\nexport function scaleFromCenter(extent, value) {\n const deltaX = ((extent[2] - extent[0]) / 2) * (value - 1);\n const deltaY = ((extent[3] - extent[1]) / 2) * (value - 1);\n extent[0] -= deltaX;\n extent[2] += deltaX;\n extent[1] -= deltaY;\n extent[3] += deltaY;\n}\n\n/**\n * Determine if the segment between two coordinates intersects (crosses,\n * touches, or is contained by) the provided extent.\n * @param {Extent} extent The extent.\n * @param {import(\"./coordinate.js\").Coordinate} start Segment start coordinate.\n * @param {import(\"./coordinate.js\").Coordinate} end Segment end coordinate.\n * @return {boolean} The segment intersects the extent.\n */\nexport function intersectsSegment(extent, start, end) {\n let intersects = false;\n const startRel = coordinateRelationship(extent, start);\n const endRel = coordinateRelationship(extent, end);\n if (\n startRel === Relationship.INTERSECTING ||\n endRel === Relationship.INTERSECTING\n ) {\n intersects = true;\n } else {\n const minX = extent[0];\n const minY = extent[1];\n const maxX = extent[2];\n const maxY = extent[3];\n const startX = start[0];\n const startY = start[1];\n const endX = end[0];\n const endY = end[1];\n const slope = (endY - startY) / (endX - startX);\n let x, y;\n if (!!(endRel & Relationship.ABOVE) && !(startRel & Relationship.ABOVE)) {\n // potentially intersects top\n x = endX - (endY - maxY) / slope;\n intersects = x >= minX && x <= maxX;\n }\n if (\n !intersects &&\n !!(endRel & Relationship.RIGHT) &&\n !(startRel & Relationship.RIGHT)\n ) {\n // potentially intersects right\n y = endY - (endX - maxX) * slope;\n intersects = y >= minY && y <= maxY;\n }\n if (\n !intersects &&\n !!(endRel & Relationship.BELOW) &&\n !(startRel & Relationship.BELOW)\n ) {\n // potentially intersects bottom\n x = endX - (endY - minY) / slope;\n intersects = x >= minX && x <= maxX;\n }\n if (\n !intersects &&\n !!(endRel & Relationship.LEFT) &&\n !(startRel & Relationship.LEFT)\n ) {\n // potentially intersects left\n y = endY - (endX - minX) * slope;\n intersects = y >= minY && y <= maxY;\n }\n }\n return intersects;\n}\n\n/**\n * Apply a transform function to the extent.\n * @param {Extent} extent Extent.\n * @param {import(\"./proj.js\").TransformFunction} transformFn Transform function.\n * Called with `[minX, minY, maxX, maxY]` extent coordinates.\n * @param {Extent} [dest] Destination extent.\n * @param {number} [stops] Number of stops per side used for the transform.\n * By default only the corners are used.\n * @return {Extent} Extent.\n * @api\n */\nexport function applyTransform(extent, transformFn, dest, stops) {\n let coordinates = [];\n if (stops > 1) {\n const width = extent[2] - extent[0];\n const height = extent[3] - extent[1];\n for (let i = 0; i < stops; ++i) {\n coordinates.push(\n extent[0] + (width * i) / stops,\n extent[1],\n extent[2],\n extent[1] + (height * i) / stops,\n extent[2] - (width * i) / stops,\n extent[3],\n extent[0],\n extent[3] - (height * i) / stops\n );\n }\n } else {\n coordinates = [\n extent[0],\n extent[1],\n extent[2],\n extent[1],\n extent[2],\n extent[3],\n extent[0],\n extent[3],\n ];\n }\n transformFn(coordinates, coordinates, 2);\n const xs = [];\n const ys = [];\n for (let i = 0, l = coordinates.length; i < l; i += 2) {\n xs.push(coordinates[i]);\n ys.push(coordinates[i + 1]);\n }\n return _boundingExtentXYs(xs, ys, dest);\n}\n\n/**\n * Modifies the provided extent in-place to be within the real world\n * extent.\n *\n * @param {Extent} extent Extent.\n * @param {import(\"./proj/Projection.js\").default} projection Projection\n * @return {Extent} The extent within the real world extent.\n */\nexport function wrapX(extent, projection) {\n const projectionExtent = projection.getExtent();\n const center = getCenter(extent);\n if (\n projection.canWrapX() &&\n (center[0] < projectionExtent[0] || center[0] >= projectionExtent[2])\n ) {\n const worldWidth = getWidth(projectionExtent);\n const worldsAway = Math.floor(\n (center[0] - projectionExtent[0]) / worldWidth\n );\n const offset = worldsAway * worldWidth;\n extent[0] -= offset;\n extent[2] -= offset;\n }\n return extent;\n}\n\n/**\n * Fits the extent to the real world\n *\n * If the extent does not cross the anti meridian, this will return the extent in an array\n * If the extent crosses the anti meridian, the extent will be sliced, so each part fits within the\n * real world\n *\n *\n * @param {Extent} extent Extent.\n * @param {import(\"./proj/Projection.js\").default} projection Projection\n * @return {Array} The extent within the real world extent.\n */\nexport function wrapAndSliceX(extent, projection) {\n if (projection.canWrapX()) {\n const projectionExtent = projection.getExtent();\n\n if (!isFinite(extent[0]) || !isFinite(extent[2])) {\n return [[projectionExtent[0], extent[1], projectionExtent[2], extent[3]]];\n }\n\n wrapX(extent, projection);\n const worldWidth = getWidth(projectionExtent);\n\n if (getWidth(extent) > worldWidth) {\n // the extent wraps around on itself\n return [[projectionExtent[0], extent[1], projectionExtent[2], extent[3]]];\n } else if (extent[0] < projectionExtent[0]) {\n // the extent crosses the anti meridian, so it needs to be sliced\n return [\n [extent[0] + worldWidth, extent[1], projectionExtent[2], extent[3]],\n [projectionExtent[0], extent[1], extent[2], extent[3]],\n ];\n } else if (extent[2] > projectionExtent[2]) {\n // the extent crosses the anti meridian, so it needs to be sliced\n return [\n [extent[0], extent[1], projectionExtent[2], extent[3]],\n [projectionExtent[0], extent[1], extent[2] - worldWidth, extent[3]],\n ];\n }\n }\n\n return [extent];\n}\n","/**\n * @module ol/proj/Units\n */\n\n/**\n * @typedef {'radians' | 'degrees' | 'ft' | 'm' | 'pixels' | 'tile-pixels' | 'us-ft'} Units\n * Projection units.\n */\n\n/**\n * See http://duff.ess.washington.edu/data/raster/drg/docs/geotiff.txt\n * @type {Object}\n */\nconst unitByCode = {\n '9001': 'm',\n '9002': 'ft',\n '9003': 'us-ft',\n '9101': 'radians',\n '9102': 'degrees',\n};\n\n/**\n * @param {number} code Unit code.\n * @return {Units} Units.\n */\nexport function fromCode(code) {\n return unitByCode[code];\n}\n\n/**\n * @typedef {Object} MetersPerUnitLookup\n * @property {number} radians Radians\n * @property {number} degrees Degrees\n * @property {number} ft Feet\n * @property {number} m Meters\n * @property {number} us-ft US feet\n */\n\n/**\n * Meters per unit lookup table.\n * @const\n * @type {MetersPerUnitLookup}\n * @api\n */\nexport const METERS_PER_UNIT = {\n // use the radius of the Normal sphere\n 'radians': 6370997 / (2 * Math.PI),\n 'degrees': (2 * Math.PI * 6370997) / 360,\n 'ft': 0.3048,\n 'm': 1,\n 'us-ft': 1200 / 3937,\n};\n","/**\n * @module ol/proj/Projection\n */\nimport {METERS_PER_UNIT} from './Units.js';\n\n/**\n * @typedef {Object} Options\n * @property {string} code The SRS identifier code, e.g. `EPSG:4326`.\n * @property {import(\"./Units.js\").Units} [units] Units. Required unless a\n * proj4 projection is defined for `code`.\n * @property {import(\"../extent.js\").Extent} [extent] The validity extent for the SRS.\n * @property {string} [axisOrientation='enu'] The axis orientation as specified in Proj4.\n * @property {boolean} [global=false] Whether the projection is valid for the whole globe.\n * @property {number} [metersPerUnit] The meters per unit for the SRS.\n * If not provided, the `units` are used to get the meters per unit from the {@link METERS_PER_UNIT}\n * lookup table.\n * @property {import(\"../extent.js\").Extent} [worldExtent] The world extent for the SRS.\n * @property {function(number, import(\"../coordinate.js\").Coordinate):number} [getPointResolution]\n * Function to determine resolution at a point. The function is called with a\n * `number` view resolution and a {@link module:ol/coordinate~Coordinate} as arguments, and returns\n * the `number` resolution in projection units at the passed coordinate. If this is `undefined`,\n * the default {@link module:ol/proj.getPointResolution} function will be used.\n */\n\n/**\n * @classdesc\n * Projection definition class. One of these is created for each projection\n * supported in the application and stored in the {@link module:ol/proj} namespace.\n * You can use these in applications, but this is not required, as API params\n * and options use {@link module:ol/proj~ProjectionLike} which means the simple string\n * code will suffice.\n *\n * You can use {@link module:ol/proj.get} to retrieve the object for a particular\n * projection.\n *\n * The library includes definitions for `EPSG:4326` and `EPSG:3857`, together\n * with the following aliases:\n * * `EPSG:4326`: CRS:84, urn:ogc:def:crs:EPSG:6.6:4326,\n * urn:ogc:def:crs:OGC:1.3:CRS84, urn:ogc:def:crs:OGC:2:84,\n * http://www.opengis.net/gml/srs/epsg.xml#4326,\n * urn:x-ogc:def:crs:EPSG:4326\n * * `EPSG:3857`: EPSG:102100, EPSG:102113, EPSG:900913,\n * urn:ogc:def:crs:EPSG:6.18:3:3857,\n * http://www.opengis.net/gml/srs/epsg.xml#3857\n *\n * If you use [proj4js](https://github.com/proj4js/proj4js), aliases can\n * be added using `proj4.defs()`. After all required projection definitions are\n * added, call the {@link module:ol/proj/proj4.register} function.\n *\n * @api\n */\nclass Projection {\n /**\n * @param {Options} options Projection options.\n */\n constructor(options) {\n /**\n * @private\n * @type {string}\n */\n this.code_ = options.code;\n\n /**\n * Units of projected coordinates. When set to `TILE_PIXELS`, a\n * `this.extent_` and `this.worldExtent_` must be configured properly for each\n * tile.\n * @private\n * @type {import(\"./Units.js\").Units}\n */\n this.units_ = /** @type {import(\"./Units.js\").Units} */ (options.units);\n\n /**\n * Validity extent of the projection in projected coordinates. For projections\n * with `TILE_PIXELS` units, this is the extent of the tile in\n * tile pixel space.\n * @private\n * @type {import(\"../extent.js\").Extent}\n */\n this.extent_ = options.extent !== undefined ? options.extent : null;\n\n /**\n * Extent of the world in EPSG:4326. For projections with\n * `TILE_PIXELS` units, this is the extent of the tile in\n * projected coordinate space.\n * @private\n * @type {import(\"../extent.js\").Extent}\n */\n this.worldExtent_ =\n options.worldExtent !== undefined ? options.worldExtent : null;\n\n /**\n * @private\n * @type {string}\n */\n this.axisOrientation_ =\n options.axisOrientation !== undefined ? options.axisOrientation : 'enu';\n\n /**\n * @private\n * @type {boolean}\n */\n this.global_ = options.global !== undefined ? options.global : false;\n\n /**\n * @private\n * @type {boolean}\n */\n this.canWrapX_ = !!(this.global_ && this.extent_);\n\n /**\n * @private\n * @type {function(number, import(\"../coordinate.js\").Coordinate):number|undefined}\n */\n this.getPointResolutionFunc_ = options.getPointResolution;\n\n /**\n * @private\n * @type {import(\"../tilegrid/TileGrid.js\").default}\n */\n this.defaultTileGrid_ = null;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.metersPerUnit_ = options.metersPerUnit;\n }\n\n /**\n * @return {boolean} The projection is suitable for wrapping the x-axis\n */\n canWrapX() {\n return this.canWrapX_;\n }\n\n /**\n * Get the code for this projection, e.g. 'EPSG:4326'.\n * @return {string} Code.\n * @api\n */\n getCode() {\n return this.code_;\n }\n\n /**\n * Get the validity extent for this projection.\n * @return {import(\"../extent.js\").Extent} Extent.\n * @api\n */\n getExtent() {\n return this.extent_;\n }\n\n /**\n * Get the units of this projection.\n * @return {import(\"./Units.js\").Units} Units.\n * @api\n */\n getUnits() {\n return this.units_;\n }\n\n /**\n * Get the amount of meters per unit of this projection. If the projection is\n * not configured with `metersPerUnit` or a units identifier, the return is\n * `undefined`.\n * @return {number|undefined} Meters.\n * @api\n */\n getMetersPerUnit() {\n return this.metersPerUnit_ || METERS_PER_UNIT[this.units_];\n }\n\n /**\n * Get the world extent for this projection.\n * @return {import(\"../extent.js\").Extent} Extent.\n * @api\n */\n getWorldExtent() {\n return this.worldExtent_;\n }\n\n /**\n * Get the axis orientation of this projection.\n * Example values are:\n * enu - the default easting, northing, elevation.\n * neu - northing, easting, up - useful for \"lat/long\" geographic coordinates,\n * or south orientated transverse mercator.\n * wnu - westing, northing, up - some planetary coordinate systems have\n * \"west positive\" coordinate systems\n * @return {string} Axis orientation.\n * @api\n */\n getAxisOrientation() {\n return this.axisOrientation_;\n }\n\n /**\n * Is this projection a global projection which spans the whole world?\n * @return {boolean} Whether the projection is global.\n * @api\n */\n isGlobal() {\n return this.global_;\n }\n\n /**\n * Set if the projection is a global projection which spans the whole world\n * @param {boolean} global Whether the projection is global.\n * @api\n */\n setGlobal(global) {\n this.global_ = global;\n this.canWrapX_ = !!(global && this.extent_);\n }\n\n /**\n * @return {import(\"../tilegrid/TileGrid.js\").default} The default tile grid.\n */\n getDefaultTileGrid() {\n return this.defaultTileGrid_;\n }\n\n /**\n * @param {import(\"../tilegrid/TileGrid.js\").default} tileGrid The default tile grid.\n */\n setDefaultTileGrid(tileGrid) {\n this.defaultTileGrid_ = tileGrid;\n }\n\n /**\n * Set the validity extent for this projection.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @api\n */\n setExtent(extent) {\n this.extent_ = extent;\n this.canWrapX_ = !!(this.global_ && extent);\n }\n\n /**\n * Set the world extent for this projection.\n * @param {import(\"../extent.js\").Extent} worldExtent World extent\n * [minlon, minlat, maxlon, maxlat].\n * @api\n */\n setWorldExtent(worldExtent) {\n this.worldExtent_ = worldExtent;\n }\n\n /**\n * Set the getPointResolution function (see {@link module:ol/proj.getPointResolution}\n * for this projection.\n * @param {function(number, import(\"../coordinate.js\").Coordinate):number} func Function\n * @api\n */\n setGetPointResolution(func) {\n this.getPointResolutionFunc_ = func;\n }\n\n /**\n * Get the custom point resolution function for this projection (if set).\n * @return {function(number, import(\"../coordinate.js\").Coordinate):number|undefined} The custom point\n * resolution function (if set).\n */\n getPointResolutionFunc() {\n return this.getPointResolutionFunc_;\n }\n}\n\nexport default Projection;\n","/**\n * @module ol/proj/epsg3857\n */\nimport Projection from './Projection.js';\n\n/**\n * Radius of WGS84 sphere\n *\n * @const\n * @type {number}\n */\nexport const RADIUS = 6378137;\n\n/**\n * @const\n * @type {number}\n */\nexport const HALF_SIZE = Math.PI * RADIUS;\n\n/**\n * @const\n * @type {import(\"../extent.js\").Extent}\n */\nexport const EXTENT = [-HALF_SIZE, -HALF_SIZE, HALF_SIZE, HALF_SIZE];\n\n/**\n * @const\n * @type {import(\"../extent.js\").Extent}\n */\nexport const WORLD_EXTENT = [-180, -85, 180, 85];\n\n/**\n * Maximum safe value in y direction\n * @const\n * @type {number}\n */\nexport const MAX_SAFE_Y = RADIUS * Math.log(Math.tan(Math.PI / 2));\n\n/**\n * @classdesc\n * Projection object for web/spherical Mercator (EPSG:3857).\n */\nclass EPSG3857Projection extends Projection {\n /**\n * @param {string} code Code.\n */\n constructor(code) {\n super({\n code: code,\n units: 'm',\n extent: EXTENT,\n global: true,\n worldExtent: WORLD_EXTENT,\n getPointResolution: function (resolution, point) {\n return resolution / Math.cosh(point[1] / RADIUS);\n },\n });\n }\n}\n\n/**\n * Projections equal to EPSG:3857.\n *\n * @const\n * @type {Array}\n */\nexport const PROJECTIONS = [\n new EPSG3857Projection('EPSG:3857'),\n new EPSG3857Projection('EPSG:102100'),\n new EPSG3857Projection('EPSG:102113'),\n new EPSG3857Projection('EPSG:900913'),\n new EPSG3857Projection('http://www.opengis.net/def/crs/EPSG/0/3857'),\n new EPSG3857Projection('http://www.opengis.net/gml/srs/epsg.xml#3857'),\n];\n\n/**\n * Transformation from EPSG:4326 to EPSG:3857.\n *\n * @param {Array} input Input array of coordinate values.\n * @param {Array} [output] Output array of coordinate values.\n * @param {number} [dimension] Dimension (default is `2`).\n * @return {Array} Output array of coordinate values.\n */\nexport function fromEPSG4326(input, output, dimension) {\n const length = input.length;\n dimension = dimension > 1 ? dimension : 2;\n if (output === undefined) {\n if (dimension > 2) {\n // preserve values beyond second dimension\n output = input.slice();\n } else {\n output = new Array(length);\n }\n }\n for (let i = 0; i < length; i += dimension) {\n output[i] = (HALF_SIZE * input[i]) / 180;\n let y = RADIUS * Math.log(Math.tan((Math.PI * (+input[i + 1] + 90)) / 360));\n if (y > MAX_SAFE_Y) {\n y = MAX_SAFE_Y;\n } else if (y < -MAX_SAFE_Y) {\n y = -MAX_SAFE_Y;\n }\n output[i + 1] = y;\n }\n return output;\n}\n\n/**\n * Transformation from EPSG:3857 to EPSG:4326.\n *\n * @param {Array} input Input array of coordinate values.\n * @param {Array} [output] Output array of coordinate values.\n * @param {number} [dimension] Dimension (default is `2`).\n * @return {Array} Output array of coordinate values.\n */\nexport function toEPSG4326(input, output, dimension) {\n const length = input.length;\n dimension = dimension > 1 ? dimension : 2;\n if (output === undefined) {\n if (dimension > 2) {\n // preserve values beyond second dimension\n output = input.slice();\n } else {\n output = new Array(length);\n }\n }\n for (let i = 0; i < length; i += dimension) {\n output[i] = (180 * input[i]) / HALF_SIZE;\n output[i + 1] =\n (360 * Math.atan(Math.exp(input[i + 1] / RADIUS))) / Math.PI - 90;\n }\n return output;\n}\n","/**\n * @module ol/proj/epsg4326\n */\nimport Projection from './Projection.js';\n\n/**\n * Semi-major radius of the WGS84 ellipsoid.\n *\n * @const\n * @type {number}\n */\nexport const RADIUS = 6378137;\n\n/**\n * Extent of the EPSG:4326 projection which is the whole world.\n *\n * @const\n * @type {import(\"../extent.js\").Extent}\n */\nexport const EXTENT = [-180, -90, 180, 90];\n\n/**\n * @const\n * @type {number}\n */\nexport const METERS_PER_UNIT = (Math.PI * RADIUS) / 180;\n\n/**\n * @classdesc\n * Projection object for WGS84 geographic coordinates (EPSG:4326).\n *\n * Note that OpenLayers does not strictly comply with the EPSG definition.\n * The EPSG registry defines 4326 as a CRS for Latitude,Longitude (y,x).\n * OpenLayers treats EPSG:4326 as a pseudo-projection, with x,y coordinates.\n */\nclass EPSG4326Projection extends Projection {\n /**\n * @param {string} code Code.\n * @param {string} [axisOrientation] Axis orientation.\n */\n constructor(code, axisOrientation) {\n super({\n code: code,\n units: 'degrees',\n extent: EXTENT,\n axisOrientation: axisOrientation,\n global: true,\n metersPerUnit: METERS_PER_UNIT,\n worldExtent: EXTENT,\n });\n }\n}\n\n/**\n * Projections equal to EPSG:4326.\n *\n * @const\n * @type {Array}\n */\nexport const PROJECTIONS = [\n new EPSG4326Projection('CRS:84'),\n new EPSG4326Projection('EPSG:4326', 'neu'),\n new EPSG4326Projection('urn:ogc:def:crs:OGC:1.3:CRS84'),\n new EPSG4326Projection('urn:ogc:def:crs:OGC:2:84'),\n new EPSG4326Projection('http://www.opengis.net/def/crs/OGC/1.3/CRS84'),\n new EPSG4326Projection('http://www.opengis.net/gml/srs/epsg.xml#4326', 'neu'),\n new EPSG4326Projection('http://www.opengis.net/def/crs/EPSG/0/4326', 'neu'),\n];\n","/**\n * @module ol/proj/projections\n */\n\n/**\n * @type {Object}\n */\nlet cache = {};\n\n/**\n * Clear the projections cache.\n */\nexport function clear() {\n cache = {};\n}\n\n/**\n * Get a cached projection by code.\n * @param {string} code The code for the projection.\n * @return {import(\"./Projection.js\").default} The projection (if cached).\n */\nexport function get(code) {\n return (\n cache[code] ||\n cache[code.replace(/urn:(x-)?ogc:def:crs:EPSG:(.*:)?(\\w+)$/, 'EPSG:$3')] ||\n null\n );\n}\n\n/**\n * Add a projection to the cache.\n * @param {string} code The projection code.\n * @param {import(\"./Projection.js\").default} projection The projection to cache.\n */\nexport function add(code, projection) {\n cache[code] = projection;\n}\n","/**\n * @module ol/proj/transforms\n */\nimport {isEmpty} from '../obj.js';\n\n/**\n * @private\n * @type {!Object>}\n */\nlet transforms = {};\n\n/**\n * Clear the transform cache.\n */\nexport function clear() {\n transforms = {};\n}\n\n/**\n * Registers a conversion function to convert coordinates from the source\n * projection to the destination projection.\n *\n * @param {import(\"./Projection.js\").default} source Source.\n * @param {import(\"./Projection.js\").default} destination Destination.\n * @param {import(\"../proj.js\").TransformFunction} transformFn Transform.\n */\nexport function add(source, destination, transformFn) {\n const sourceCode = source.getCode();\n const destinationCode = destination.getCode();\n if (!(sourceCode in transforms)) {\n transforms[sourceCode] = {};\n }\n transforms[sourceCode][destinationCode] = transformFn;\n}\n\n/**\n * Unregisters the conversion function to convert coordinates from the source\n * projection to the destination projection. This method is used to clean up\n * cached transforms during testing.\n *\n * @param {import(\"./Projection.js\").default} source Source projection.\n * @param {import(\"./Projection.js\").default} destination Destination projection.\n * @return {import(\"../proj.js\").TransformFunction} transformFn The unregistered transform.\n */\nexport function remove(source, destination) {\n const sourceCode = source.getCode();\n const destinationCode = destination.getCode();\n const transform = transforms[sourceCode][destinationCode];\n delete transforms[sourceCode][destinationCode];\n if (isEmpty(transforms[sourceCode])) {\n delete transforms[sourceCode];\n }\n return transform;\n}\n\n/**\n * Get a transform given a source code and a destination code.\n * @param {string} sourceCode The code for the source projection.\n * @param {string} destinationCode The code for the destination projection.\n * @return {import(\"../proj.js\").TransformFunction|undefined} The transform function (if found).\n */\nexport function get(sourceCode, destinationCode) {\n let transform;\n if (sourceCode in transforms && destinationCode in transforms[sourceCode]) {\n transform = transforms[sourceCode][destinationCode];\n }\n return transform;\n}\n","/**\n * @module ol/math\n */\n\n/**\n * Takes a number and clamps it to within the provided bounds.\n * @param {number} value The input number.\n * @param {number} min The minimum value to return.\n * @param {number} max The maximum value to return.\n * @return {number} The input number if it is within bounds, or the nearest\n * number within the bounds.\n */\nexport function clamp(value, min, max) {\n return Math.min(Math.max(value, min), max);\n}\n\n/**\n * Returns the square of the closest distance between the point (x, y) and the\n * line segment (x1, y1) to (x2, y2).\n * @param {number} x X.\n * @param {number} y Y.\n * @param {number} x1 X1.\n * @param {number} y1 Y1.\n * @param {number} x2 X2.\n * @param {number} y2 Y2.\n * @return {number} Squared distance.\n */\nexport function squaredSegmentDistance(x, y, x1, y1, x2, y2) {\n const dx = x2 - x1;\n const dy = y2 - y1;\n if (dx !== 0 || dy !== 0) {\n const t = ((x - x1) * dx + (y - y1) * dy) / (dx * dx + dy * dy);\n if (t > 1) {\n x1 = x2;\n y1 = y2;\n } else if (t > 0) {\n x1 += dx * t;\n y1 += dy * t;\n }\n }\n return squaredDistance(x, y, x1, y1);\n}\n\n/**\n * Returns the square of the distance between the points (x1, y1) and (x2, y2).\n * @param {number} x1 X1.\n * @param {number} y1 Y1.\n * @param {number} x2 X2.\n * @param {number} y2 Y2.\n * @return {number} Squared distance.\n */\nexport function squaredDistance(x1, y1, x2, y2) {\n const dx = x2 - x1;\n const dy = y2 - y1;\n return dx * dx + dy * dy;\n}\n\n/**\n * Solves system of linear equations using Gaussian elimination method.\n *\n * @param {Array>} mat Augmented matrix (n x n + 1 column)\n * in row-major order.\n * @return {Array} The resulting vector.\n */\nexport function solveLinearSystem(mat) {\n const n = mat.length;\n\n for (let i = 0; i < n; i++) {\n // Find max in the i-th column (ignoring i - 1 first rows)\n let maxRow = i;\n let maxEl = Math.abs(mat[i][i]);\n for (let r = i + 1; r < n; r++) {\n const absValue = Math.abs(mat[r][i]);\n if (absValue > maxEl) {\n maxEl = absValue;\n maxRow = r;\n }\n }\n\n if (maxEl === 0) {\n return null; // matrix is singular\n }\n\n // Swap max row with i-th (current) row\n const tmp = mat[maxRow];\n mat[maxRow] = mat[i];\n mat[i] = tmp;\n\n // Subtract the i-th row to make all the remaining rows 0 in the i-th column\n for (let j = i + 1; j < n; j++) {\n const coef = -mat[j][i] / mat[i][i];\n for (let k = i; k < n + 1; k++) {\n if (i == k) {\n mat[j][k] = 0;\n } else {\n mat[j][k] += coef * mat[i][k];\n }\n }\n }\n }\n\n // Solve Ax=b for upper triangular matrix A (mat)\n const x = new Array(n);\n for (let l = n - 1; l >= 0; l--) {\n x[l] = mat[l][n] / mat[l][l];\n for (let m = l - 1; m >= 0; m--) {\n mat[m][n] -= mat[m][l] * x[l];\n }\n }\n return x;\n}\n\n/**\n * Converts radians to to degrees.\n *\n * @param {number} angleInRadians Angle in radians.\n * @return {number} Angle in degrees.\n */\nexport function toDegrees(angleInRadians) {\n return (angleInRadians * 180) / Math.PI;\n}\n\n/**\n * Converts degrees to radians.\n *\n * @param {number} angleInDegrees Angle in degrees.\n * @return {number} Angle in radians.\n */\nexport function toRadians(angleInDegrees) {\n return (angleInDegrees * Math.PI) / 180;\n}\n\n/**\n * Returns the modulo of a / b, depending on the sign of b.\n *\n * @param {number} a Dividend.\n * @param {number} b Divisor.\n * @return {number} Modulo.\n */\nexport function modulo(a, b) {\n const r = a % b;\n return r * b < 0 ? r + b : r;\n}\n\n/**\n * Calculates the linearly interpolated value of x between a and b.\n *\n * @param {number} a Number\n * @param {number} b Number\n * @param {number} x Value to be interpolated.\n * @return {number} Interpolated value.\n */\nexport function lerp(a, b, x) {\n return a + x * (b - a);\n}\n\n/**\n * Returns a number with a limited number of decimal digits.\n * @param {number} n The input number.\n * @param {number} decimals The maximum number of decimal digits.\n * @return {number} The input number with a limited number of decimal digits.\n */\nexport function toFixed(n, decimals) {\n const factor = Math.pow(10, decimals);\n return Math.round(n * factor) / factor;\n}\n\n/**\n * Rounds a number to the nearest integer value considering only the given number\n * of decimal digits (with rounding on the final digit).\n * @param {number} n The input number.\n * @param {number} decimals The maximum number of decimal digits.\n * @return {number} The nearest integer.\n */\nexport function round(n, decimals) {\n return Math.round(toFixed(n, decimals));\n}\n\n/**\n * Rounds a number to the next smaller integer considering only the given number\n * of decimal digits (with rounding on the final digit).\n * @param {number} n The input number.\n * @param {number} decimals The maximum number of decimal digits.\n * @return {number} The next smaller integer.\n */\nexport function floor(n, decimals) {\n return Math.floor(toFixed(n, decimals));\n}\n\n/**\n * Rounds a number to the next bigger integer considering only the given number\n * of decimal digits (with rounding on the final digit).\n * @param {number} n The input number.\n * @param {number} decimals The maximum number of decimal digits.\n * @return {number} The next bigger integer.\n */\nexport function ceil(n, decimals) {\n return Math.ceil(toFixed(n, decimals));\n}\n","/**\n * @module ol/string\n */\n\n/**\n * @param {number} number Number to be formatted\n * @param {number} width The desired width\n * @param {number} [precision] Precision of the output string (i.e. number of decimal places)\n * @return {string} Formatted string\n */\nexport function padNumber(number, width, precision) {\n const numberString =\n precision !== undefined ? number.toFixed(precision) : '' + number;\n let decimal = numberString.indexOf('.');\n decimal = decimal === -1 ? numberString.length : decimal;\n return decimal > width\n ? numberString\n : new Array(1 + width - decimal).join('0') + numberString;\n}\n\n/**\n * Adapted from https://github.com/omichelsen/compare-versions/blob/master/index.js\n * @param {string|number} v1 First version\n * @param {string|number} v2 Second version\n * @return {number} Value\n */\nexport function compareVersions(v1, v2) {\n const s1 = ('' + v1).split('.');\n const s2 = ('' + v2).split('.');\n\n for (let i = 0; i < Math.max(s1.length, s2.length); i++) {\n const n1 = parseInt(s1[i] || '0', 10);\n const n2 = parseInt(s2[i] || '0', 10);\n\n if (n1 > n2) {\n return 1;\n }\n if (n2 > n1) {\n return -1;\n }\n }\n\n return 0;\n}\n","/**\n * @module ol/coordinate\n */\nimport {getWidth} from './extent.js';\nimport {modulo, toFixed} from './math.js';\nimport {padNumber} from './string.js';\n\n/**\n * An array of numbers representing an xy coordinate. Example: `[16, 48]`.\n * @typedef {Array} Coordinate\n * @api\n */\n\n/**\n * A function that takes a {@link module:ol/coordinate~Coordinate} and\n * transforms it into a `{string}`.\n *\n * @typedef {function((Coordinate|undefined)): string} CoordinateFormat\n * @api\n */\n\n/**\n * Add `delta` to `coordinate`. `coordinate` is modified in place and returned\n * by the function.\n *\n * Example:\n *\n * import {add} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * add(coord, [-2, 4]);\n * // coord is now [5.85, 51.983333]\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {Coordinate} delta Delta.\n * @return {Coordinate} The input coordinate adjusted by\n * the given delta.\n * @api\n */\nexport function add(coordinate, delta) {\n coordinate[0] += +delta[0];\n coordinate[1] += +delta[1];\n return coordinate;\n}\n\n/**\n * Calculates the point closest to the passed coordinate on the passed circle.\n *\n * @param {Coordinate} coordinate The coordinate.\n * @param {import(\"./geom/Circle.js\").default} circle The circle.\n * @return {Coordinate} Closest point on the circumference.\n */\nexport function closestOnCircle(coordinate, circle) {\n const r = circle.getRadius();\n const center = circle.getCenter();\n const x0 = center[0];\n const y0 = center[1];\n const x1 = coordinate[0];\n const y1 = coordinate[1];\n\n let dx = x1 - x0;\n const dy = y1 - y0;\n if (dx === 0 && dy === 0) {\n dx = 1;\n }\n const d = Math.sqrt(dx * dx + dy * dy);\n\n const x = x0 + (r * dx) / d;\n const y = y0 + (r * dy) / d;\n\n return [x, y];\n}\n\n/**\n * Calculates the point closest to the passed coordinate on the passed segment.\n * This is the foot of the perpendicular of the coordinate to the segment when\n * the foot is on the segment, or the closest segment coordinate when the foot\n * is outside the segment.\n *\n * @param {Coordinate} coordinate The coordinate.\n * @param {Array} segment The two coordinates\n * of the segment.\n * @return {Coordinate} The foot of the perpendicular of\n * the coordinate to the segment.\n */\nexport function closestOnSegment(coordinate, segment) {\n const x0 = coordinate[0];\n const y0 = coordinate[1];\n const start = segment[0];\n const end = segment[1];\n const x1 = start[0];\n const y1 = start[1];\n const x2 = end[0];\n const y2 = end[1];\n const dx = x2 - x1;\n const dy = y2 - y1;\n const along =\n dx === 0 && dy === 0\n ? 0\n : (dx * (x0 - x1) + dy * (y0 - y1)) / (dx * dx + dy * dy || 0);\n let x, y;\n if (along <= 0) {\n x = x1;\n y = y1;\n } else if (along >= 1) {\n x = x2;\n y = y2;\n } else {\n x = x1 + along * dx;\n y = y1 + along * dy;\n }\n return [x, y];\n}\n\n/**\n * Returns a {@link module:ol/coordinate~CoordinateFormat} function that can be\n * used to format\n * a {Coordinate} to a string.\n *\n * Example without specifying the fractional digits:\n *\n * import {createStringXY} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * const stringifyFunc = createStringXY();\n * const out = stringifyFunc(coord);\n * // out is now '8, 48'\n *\n * Example with explicitly specifying 2 fractional digits:\n *\n * import {createStringXY} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * const stringifyFunc = createStringXY(2);\n * const out = stringifyFunc(coord);\n * // out is now '7.85, 47.98'\n *\n * @param {number} [fractionDigits] The number of digits to include\n * after the decimal point. Default is `0`.\n * @return {CoordinateFormat} Coordinate format.\n * @api\n */\nexport function createStringXY(fractionDigits) {\n return (\n /**\n * @param {Coordinate} coordinate Coordinate.\n * @return {string} String XY.\n */\n function (coordinate) {\n return toStringXY(coordinate, fractionDigits);\n }\n );\n}\n\n/**\n * @param {string} hemispheres Hemispheres.\n * @param {number} degrees Degrees.\n * @param {number} [fractionDigits] The number of digits to include\n * after the decimal point. Default is `0`.\n * @return {string} String.\n */\nexport function degreesToStringHDMS(hemispheres, degrees, fractionDigits) {\n const normalizedDegrees = modulo(degrees + 180, 360) - 180;\n const x = Math.abs(3600 * normalizedDegrees);\n const decimals = fractionDigits || 0;\n\n let deg = Math.floor(x / 3600);\n let min = Math.floor((x - deg * 3600) / 60);\n let sec = toFixed(x - deg * 3600 - min * 60, decimals);\n\n if (sec >= 60) {\n sec = 0;\n min += 1;\n }\n\n if (min >= 60) {\n min = 0;\n deg += 1;\n }\n\n let hdms = deg + '\\u00b0';\n if (min !== 0 || sec !== 0) {\n hdms += ' ' + padNumber(min, 2) + '\\u2032';\n }\n if (sec !== 0) {\n hdms += ' ' + padNumber(sec, 2, decimals) + '\\u2033';\n }\n if (normalizedDegrees !== 0) {\n hdms += ' ' + hemispheres.charAt(normalizedDegrees < 0 ? 1 : 0);\n }\n\n return hdms;\n}\n\n/**\n * Transforms the given {@link module:ol/coordinate~Coordinate} to a string\n * using the given string template. The strings `{x}` and `{y}` in the template\n * will be replaced with the first and second coordinate values respectively.\n *\n * Example without specifying the fractional digits:\n *\n * import {format} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * const template = 'Coordinate is ({x}|{y}).';\n * const out = format(coord, template);\n * // out is now 'Coordinate is (8|48).'\n *\n * Example explicitly specifying the fractional digits:\n *\n * import {format} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * const template = 'Coordinate is ({x}|{y}).';\n * const out = format(coord, template, 2);\n * // out is now 'Coordinate is (7.85|47.98).'\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {string} template A template string with `{x}` and `{y}` placeholders\n * that will be replaced by first and second coordinate values.\n * @param {number} [fractionDigits] The number of digits to include\n * after the decimal point. Default is `0`.\n * @return {string} Formatted coordinate.\n * @api\n */\nexport function format(coordinate, template, fractionDigits) {\n if (coordinate) {\n return template\n .replace('{x}', coordinate[0].toFixed(fractionDigits))\n .replace('{y}', coordinate[1].toFixed(fractionDigits));\n }\n return '';\n}\n\n/**\n * @param {Coordinate} coordinate1 First coordinate.\n * @param {Coordinate} coordinate2 Second coordinate.\n * @return {boolean} The two coordinates are equal.\n */\nexport function equals(coordinate1, coordinate2) {\n let equals = true;\n for (let i = coordinate1.length - 1; i >= 0; --i) {\n if (coordinate1[i] != coordinate2[i]) {\n equals = false;\n break;\n }\n }\n return equals;\n}\n\n/**\n * Rotate `coordinate` by `angle`. `coordinate` is modified in place and\n * returned by the function.\n *\n * Example:\n *\n * import {rotate} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * const rotateRadians = Math.PI / 2; // 90 degrees\n * rotate(coord, rotateRadians);\n * // coord is now [-47.983333, 7.85]\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {number} angle Angle in radian.\n * @return {Coordinate} Coordinate.\n * @api\n */\nexport function rotate(coordinate, angle) {\n const cosAngle = Math.cos(angle);\n const sinAngle = Math.sin(angle);\n const x = coordinate[0] * cosAngle - coordinate[1] * sinAngle;\n const y = coordinate[1] * cosAngle + coordinate[0] * sinAngle;\n coordinate[0] = x;\n coordinate[1] = y;\n return coordinate;\n}\n\n/**\n * Scale `coordinate` by `scale`. `coordinate` is modified in place and returned\n * by the function.\n *\n * Example:\n *\n * import {scale as scaleCoordinate} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * const scale = 1.2;\n * scaleCoordinate(coord, scale);\n * // coord is now [9.42, 57.5799996]\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {number} scale Scale factor.\n * @return {Coordinate} Coordinate.\n */\nexport function scale(coordinate, scale) {\n coordinate[0] *= scale;\n coordinate[1] *= scale;\n return coordinate;\n}\n\n/**\n * @param {Coordinate} coord1 First coordinate.\n * @param {Coordinate} coord2 Second coordinate.\n * @return {number} Squared distance between coord1 and coord2.\n */\nexport function squaredDistance(coord1, coord2) {\n const dx = coord1[0] - coord2[0];\n const dy = coord1[1] - coord2[1];\n return dx * dx + dy * dy;\n}\n\n/**\n * @param {Coordinate} coord1 First coordinate.\n * @param {Coordinate} coord2 Second coordinate.\n * @return {number} Distance between coord1 and coord2.\n */\nexport function distance(coord1, coord2) {\n return Math.sqrt(squaredDistance(coord1, coord2));\n}\n\n/**\n * Calculate the squared distance from a coordinate to a line segment.\n *\n * @param {Coordinate} coordinate Coordinate of the point.\n * @param {Array} segment Line segment (2\n * coordinates).\n * @return {number} Squared distance from the point to the line segment.\n */\nexport function squaredDistanceToSegment(coordinate, segment) {\n return squaredDistance(coordinate, closestOnSegment(coordinate, segment));\n}\n\n/**\n * Format a geographic coordinate with the hemisphere, degrees, minutes, and\n * seconds.\n *\n * Example without specifying fractional digits:\n *\n * import {toStringHDMS} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * const out = toStringHDMS(coord);\n * // out is now '47° 58′ 60″ N 7° 50′ 60″ E'\n *\n * Example explicitly specifying 1 fractional digit:\n *\n * import {toStringHDMS} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * const out = toStringHDMS(coord, 1);\n * // out is now '47° 58′ 60.0″ N 7° 50′ 60.0″ E'\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {number} [fractionDigits] The number of digits to include\n * after the decimal point. Default is `0`.\n * @return {string} Hemisphere, degrees, minutes and seconds.\n * @api\n */\nexport function toStringHDMS(coordinate, fractionDigits) {\n if (coordinate) {\n return (\n degreesToStringHDMS('NS', coordinate[1], fractionDigits) +\n ' ' +\n degreesToStringHDMS('EW', coordinate[0], fractionDigits)\n );\n }\n return '';\n}\n\n/**\n * Format a coordinate as a comma delimited string.\n *\n * Example without specifying fractional digits:\n *\n * import {toStringXY} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * const out = toStringXY(coord);\n * // out is now '8, 48'\n *\n * Example explicitly specifying 1 fractional digit:\n *\n * import {toStringXY} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * const out = toStringXY(coord, 1);\n * // out is now '7.8, 48.0'\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {number} [fractionDigits] The number of digits to include\n * after the decimal point. Default is `0`.\n * @return {string} XY.\n * @api\n */\nexport function toStringXY(coordinate, fractionDigits) {\n return format(coordinate, '{x}, {y}', fractionDigits);\n}\n\n/**\n * Modifies the provided coordinate in-place to be within the real world\n * extent. The lower projection extent boundary is inclusive, the upper one\n * exclusive.\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {import(\"./proj/Projection.js\").default} projection Projection.\n * @return {Coordinate} The coordinate within the real world extent.\n */\nexport function wrapX(coordinate, projection) {\n if (projection.canWrapX()) {\n const worldWidth = getWidth(projection.getExtent());\n const worldsAway = getWorldsAway(coordinate, projection, worldWidth);\n if (worldsAway) {\n coordinate[0] -= worldsAway * worldWidth;\n }\n }\n return coordinate;\n}\n/**\n * @param {Coordinate} coordinate Coordinate.\n * @param {import(\"./proj/Projection.js\").default} projection Projection.\n * @param {number} [sourceExtentWidth] Width of the source extent.\n * @return {number} Offset in world widths.\n */\nexport function getWorldsAway(coordinate, projection, sourceExtentWidth) {\n const projectionExtent = projection.getExtent();\n let worldsAway = 0;\n if (\n projection.canWrapX() &&\n (coordinate[0] < projectionExtent[0] || coordinate[0] > projectionExtent[2])\n ) {\n sourceExtentWidth = sourceExtentWidth || getWidth(projectionExtent);\n worldsAway = Math.floor(\n (coordinate[0] - projectionExtent[0]) / sourceExtentWidth\n );\n }\n return worldsAway;\n}\n","/**\n * @module ol/sphere\n */\nimport {toDegrees, toRadians} from './math.js';\n\n/**\n * Object literal with options for the {@link getLength} or {@link getArea}\n * functions.\n * @typedef {Object} SphereMetricOptions\n * @property {import(\"./proj.js\").ProjectionLike} [projection='EPSG:3857']\n * Projection of the geometry. By default, the geometry is assumed to be in\n * Web Mercator.\n * @property {number} [radius=6371008.8] Sphere radius. By default, the\n * [mean Earth radius](https://en.wikipedia.org/wiki/Earth_radius#Mean_radius)\n * for the WGS84 ellipsoid is used.\n */\n\n/**\n * The mean Earth radius (1/3 * (2a + b)) for the WGS84 ellipsoid.\n * https://en.wikipedia.org/wiki/Earth_radius#Mean_radius\n * @type {number}\n */\nexport const DEFAULT_RADIUS = 6371008.8;\n\n/**\n * Get the great circle distance (in meters) between two geographic coordinates.\n * @param {Array} c1 Starting coordinate.\n * @param {Array} c2 Ending coordinate.\n * @param {number} [radius] The sphere radius to use. Defaults to the Earth's\n * mean radius using the WGS84 ellipsoid.\n * @return {number} The great circle distance between the points (in meters).\n * @api\n */\nexport function getDistance(c1, c2, radius) {\n radius = radius || DEFAULT_RADIUS;\n const lat1 = toRadians(c1[1]);\n const lat2 = toRadians(c2[1]);\n const deltaLatBy2 = (lat2 - lat1) / 2;\n const deltaLonBy2 = toRadians(c2[0] - c1[0]) / 2;\n const a =\n Math.sin(deltaLatBy2) * Math.sin(deltaLatBy2) +\n Math.sin(deltaLonBy2) *\n Math.sin(deltaLonBy2) *\n Math.cos(lat1) *\n Math.cos(lat2);\n return 2 * radius * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));\n}\n\n/**\n * Get the cumulative great circle length of linestring coordinates (geographic).\n * @param {Array} coordinates Linestring coordinates.\n * @param {number} radius The sphere radius to use.\n * @return {number} The length (in meters).\n */\nfunction getLengthInternal(coordinates, radius) {\n let length = 0;\n for (let i = 0, ii = coordinates.length; i < ii - 1; ++i) {\n length += getDistance(coordinates[i], coordinates[i + 1], radius);\n }\n return length;\n}\n\n/**\n * Get the spherical length of a geometry. This length is the sum of the\n * great circle distances between coordinates. For polygons, the length is\n * the sum of all rings. For points, the length is zero. For multi-part\n * geometries, the length is the sum of the length of each part.\n * @param {import(\"./geom/Geometry.js\").default} geometry A geometry.\n * @param {SphereMetricOptions} [options] Options for the\n * length calculation. By default, geometries are assumed to be in 'EPSG:3857'.\n * You can change this by providing a `projection` option.\n * @return {number} The spherical length (in meters).\n * @api\n */\nexport function getLength(geometry, options) {\n options = options || {};\n const radius = options.radius || DEFAULT_RADIUS;\n const projection = options.projection || 'EPSG:3857';\n const type = geometry.getType();\n if (type !== 'GeometryCollection') {\n geometry = geometry.clone().transform(projection, 'EPSG:4326');\n }\n let length = 0;\n let coordinates, coords, i, ii, j, jj;\n switch (type) {\n case 'Point':\n case 'MultiPoint': {\n break;\n }\n case 'LineString':\n case 'LinearRing': {\n coordinates = /** @type {import(\"./geom/SimpleGeometry.js\").default} */ (\n geometry\n ).getCoordinates();\n length = getLengthInternal(coordinates, radius);\n break;\n }\n case 'MultiLineString':\n case 'Polygon': {\n coordinates = /** @type {import(\"./geom/SimpleGeometry.js\").default} */ (\n geometry\n ).getCoordinates();\n for (i = 0, ii = coordinates.length; i < ii; ++i) {\n length += getLengthInternal(coordinates[i], radius);\n }\n break;\n }\n case 'MultiPolygon': {\n coordinates = /** @type {import(\"./geom/SimpleGeometry.js\").default} */ (\n geometry\n ).getCoordinates();\n for (i = 0, ii = coordinates.length; i < ii; ++i) {\n coords = coordinates[i];\n for (j = 0, jj = coords.length; j < jj; ++j) {\n length += getLengthInternal(coords[j], radius);\n }\n }\n break;\n }\n case 'GeometryCollection': {\n const geometries =\n /** @type {import(\"./geom/GeometryCollection.js\").default} */ (\n geometry\n ).getGeometries();\n for (i = 0, ii = geometries.length; i < ii; ++i) {\n length += getLength(geometries[i], options);\n }\n break;\n }\n default: {\n throw new Error('Unsupported geometry type: ' + type);\n }\n }\n return length;\n}\n\n/**\n * Returns the spherical area for a list of coordinates.\n *\n * [Reference](https://trs.jpl.nasa.gov/handle/2014/40409)\n * Robert. G. Chamberlain and William H. Duquette, \"Some Algorithms for\n * Polygons on a Sphere\", JPL Publication 07-03, Jet Propulsion\n * Laboratory, Pasadena, CA, June 2007\n *\n * @param {Array} coordinates List of coordinates of a linear\n * ring. If the ring is oriented clockwise, the area will be positive,\n * otherwise it will be negative.\n * @param {number} radius The sphere radius.\n * @return {number} Area (in square meters).\n */\nfunction getAreaInternal(coordinates, radius) {\n let area = 0;\n const len = coordinates.length;\n let x1 = coordinates[len - 1][0];\n let y1 = coordinates[len - 1][1];\n for (let i = 0; i < len; i++) {\n const x2 = coordinates[i][0];\n const y2 = coordinates[i][1];\n area +=\n toRadians(x2 - x1) *\n (2 + Math.sin(toRadians(y1)) + Math.sin(toRadians(y2)));\n x1 = x2;\n y1 = y2;\n }\n return (area * radius * radius) / 2.0;\n}\n\n/**\n * Get the spherical area of a geometry. This is the area (in meters) assuming\n * that polygon edges are segments of great circles on a sphere.\n * @param {import(\"./geom/Geometry.js\").default} geometry A geometry.\n * @param {SphereMetricOptions} [options] Options for the area\n * calculation. By default, geometries are assumed to be in 'EPSG:3857'.\n * You can change this by providing a `projection` option.\n * @return {number} The spherical area (in square meters).\n * @api\n */\nexport function getArea(geometry, options) {\n options = options || {};\n const radius = options.radius || DEFAULT_RADIUS;\n const projection = options.projection || 'EPSG:3857';\n const type = geometry.getType();\n if (type !== 'GeometryCollection') {\n geometry = geometry.clone().transform(projection, 'EPSG:4326');\n }\n let area = 0;\n let coordinates, coords, i, ii, j, jj;\n switch (type) {\n case 'Point':\n case 'MultiPoint':\n case 'LineString':\n case 'MultiLineString':\n case 'LinearRing': {\n break;\n }\n case 'Polygon': {\n coordinates = /** @type {import(\"./geom/Polygon.js\").default} */ (\n geometry\n ).getCoordinates();\n area = Math.abs(getAreaInternal(coordinates[0], radius));\n for (i = 1, ii = coordinates.length; i < ii; ++i) {\n area -= Math.abs(getAreaInternal(coordinates[i], radius));\n }\n break;\n }\n case 'MultiPolygon': {\n coordinates = /** @type {import(\"./geom/SimpleGeometry.js\").default} */ (\n geometry\n ).getCoordinates();\n for (i = 0, ii = coordinates.length; i < ii; ++i) {\n coords = coordinates[i];\n area += Math.abs(getAreaInternal(coords[0], radius));\n for (j = 1, jj = coords.length; j < jj; ++j) {\n area -= Math.abs(getAreaInternal(coords[j], radius));\n }\n }\n break;\n }\n case 'GeometryCollection': {\n const geometries =\n /** @type {import(\"./geom/GeometryCollection.js\").default} */ (\n geometry\n ).getGeometries();\n for (i = 0, ii = geometries.length; i < ii; ++i) {\n area += getArea(geometries[i], options);\n }\n break;\n }\n default: {\n throw new Error('Unsupported geometry type: ' + type);\n }\n }\n return area;\n}\n\n/**\n * Returns the coordinate at the given distance and bearing from `c1`.\n *\n * @param {import(\"./coordinate.js\").Coordinate} c1 The origin point (`[lon, lat]` in degrees).\n * @param {number} distance The great-circle distance between the origin\n * point and the target point.\n * @param {number} bearing The bearing (in radians).\n * @param {number} [radius] The sphere radius to use. Defaults to the Earth's\n * mean radius using the WGS84 ellipsoid.\n * @return {import(\"./coordinate.js\").Coordinate} The target point.\n */\nexport function offset(c1, distance, bearing, radius) {\n radius = radius || DEFAULT_RADIUS;\n const lat1 = toRadians(c1[1]);\n const lon1 = toRadians(c1[0]);\n const dByR = distance / radius;\n const lat = Math.asin(\n Math.sin(lat1) * Math.cos(dByR) +\n Math.cos(lat1) * Math.sin(dByR) * Math.cos(bearing)\n );\n const lon =\n lon1 +\n Math.atan2(\n Math.sin(bearing) * Math.sin(dByR) * Math.cos(lat1),\n Math.cos(dByR) - Math.sin(lat1) * Math.sin(lat)\n );\n return [toDegrees(lon), toDegrees(lat)];\n}\n","/**\n * @module ol/console\n */\n\n/**\n * @typedef {'info'|'warn'|'error'|'none'} Level\n */\n\n/**\n * @type {Object}\n */\nconst levels = {\n info: 1,\n warn: 2,\n error: 3,\n none: 4,\n};\n\n/**\n * @type {number}\n */\nlet level = levels.info;\n\n/**\n * Set the logging level. By default, the level is set to 'info' and all\n * messages will be logged. Set to 'warn' to only display warnings and errors.\n * Set to 'error' to only display errors. Set to 'none' to silence all messages.\n *\n * @param {Level} l The new level.\n */\nexport function setLevel(l) {\n level = levels[l];\n}\n\nexport function log(...args) {\n if (level > levels.info) {\n return;\n }\n console.log(...args); // eslint-disable-line no-console\n}\n\nexport function warn(...args) {\n if (level > levels.warn) {\n return;\n }\n console.warn(...args); // eslint-disable-line no-console\n}\n\nexport function error(...args) {\n if (level > levels.error) {\n return;\n }\n console.error(...args); // eslint-disable-line no-console\n}\n","/**\n * @module ol/proj\n */\n\n/**\n * The ol/proj module stores:\n * * a list of {@link module:ol/proj/Projection~Projection}\n * objects, one for each projection supported by the application\n * * a list of transform functions needed to convert coordinates in one projection\n * into another.\n *\n * The static functions are the methods used to maintain these.\n * Each transform function can handle not only simple coordinate pairs, but also\n * large arrays of coordinates such as vector geometries.\n *\n * When loaded, the library adds projection objects for EPSG:4326 (WGS84\n * geographic coordinates) and EPSG:3857 (Web or Spherical Mercator, as used\n * for example by Bing Maps or OpenStreetMap), together with the relevant\n * transform functions.\n *\n * Additional transforms may be added by using the http://proj4js.org/\n * library (version 2.2 or later). You can use the full build supplied by\n * Proj4js, or create a custom build to support those projections you need; see\n * the Proj4js website for how to do this. You also need the Proj4js definitions\n * for the required projections. These definitions can be obtained from\n * https://epsg.io/, and are a JS function, so can be loaded in a script\n * tag (as in the examples) or pasted into your application.\n *\n * After all required projection definitions are added to proj4's registry (by\n * using `proj4.defs()`), simply call `register(proj4)` from the `ol/proj/proj4`\n * package. Existing transforms are not changed by this function. See\n * examples/wms-image-custom-proj for an example of this.\n *\n * Additional projection definitions can be registered with `proj4.defs()` any\n * time. Just make sure to call `register(proj4)` again; for example, with user-supplied data where you don't\n * know in advance what projections are needed, you can initially load minimal\n * support and then load whichever are requested.\n *\n * Note that Proj4js does not support projection extents. If you want to add\n * one for creating default tile grids, you can add it after the Projection\n * object has been created with `setExtent`, for example,\n * `get('EPSG:1234').setExtent(extent)`.\n *\n * In addition to Proj4js support, any transform functions can be added with\n * {@link module:ol/proj.addCoordinateTransforms}. To use this, you must first create\n * a {@link module:ol/proj/Projection~Projection} object for the new projection and add it with\n * {@link module:ol/proj.addProjection}. You can then add the forward and inverse\n * functions with {@link module:ol/proj.addCoordinateTransforms}. See\n * examples/wms-custom-proj for an example of this.\n *\n * Note that if no transforms are needed and you only need to define the\n * projection, just add a {@link module:ol/proj/Projection~Projection} with\n * {@link module:ol/proj.addProjection}. See examples/wms-no-proj for an example of\n * this.\n */\nimport Projection from './proj/Projection.js';\nimport {\n PROJECTIONS as EPSG3857_PROJECTIONS,\n fromEPSG4326,\n toEPSG4326,\n} from './proj/epsg3857.js';\nimport {PROJECTIONS as EPSG4326_PROJECTIONS} from './proj/epsg4326.js';\nimport {METERS_PER_UNIT} from './proj/Units.js';\nimport {\n add as addProj,\n clear as clearProj,\n get as getProj,\n} from './proj/projections.js';\nimport {\n add as addTransformFunc,\n clear as clearTransformFuncs,\n get as getTransformFunc,\n} from './proj/transforms.js';\nimport {applyTransform, getWidth} from './extent.js';\nimport {clamp, modulo} from './math.js';\nimport {equals, getWorldsAway} from './coordinate.js';\nimport {getDistance} from './sphere.js';\nimport {warn} from './console.js';\n\n/**\n * A projection as {@link module:ol/proj/Projection~Projection}, SRS identifier\n * string or undefined.\n * @typedef {Projection|string|undefined} ProjectionLike\n * @api\n */\n\n/**\n * A transform function accepts an array of input coordinate values, an optional\n * output array, and an optional dimension (default should be 2). The function\n * transforms the input coordinate values, populates the output array, and\n * returns the output array.\n *\n * @typedef {function(Array, Array=, number=): Array} TransformFunction\n * @api\n */\n\nexport {METERS_PER_UNIT};\n\nexport {Projection};\n\nlet showCoordinateWarning = true;\n\n/**\n * @param {boolean} [disable = true] Disable console info about `useGeographic()`\n */\nexport function disableCoordinateWarning(disable) {\n const hide = disable === undefined ? true : disable;\n showCoordinateWarning = !hide;\n}\n\n/**\n * @param {Array} input Input coordinate array.\n * @param {Array} [output] Output array of coordinate values.\n * @return {Array} Output coordinate array (new array, same coordinate\n * values).\n */\nexport function cloneTransform(input, output) {\n if (output !== undefined) {\n for (let i = 0, ii = input.length; i < ii; ++i) {\n output[i] = input[i];\n }\n output = output;\n } else {\n output = input.slice();\n }\n return output;\n}\n\n/**\n * @param {Array} input Input coordinate array.\n * @param {Array} [output] Output array of coordinate values.\n * @return {Array} Input coordinate array (same array as input).\n */\nexport function identityTransform(input, output) {\n if (output !== undefined && input !== output) {\n for (let i = 0, ii = input.length; i < ii; ++i) {\n output[i] = input[i];\n }\n input = output;\n }\n return input;\n}\n\n/**\n * Add a Projection object to the list of supported projections that can be\n * looked up by their code.\n *\n * @param {Projection} projection Projection instance.\n * @api\n */\nexport function addProjection(projection) {\n addProj(projection.getCode(), projection);\n addTransformFunc(projection, projection, cloneTransform);\n}\n\n/**\n * @param {Array} projections Projections.\n */\nexport function addProjections(projections) {\n projections.forEach(addProjection);\n}\n\n/**\n * Fetches a Projection object for the code specified.\n *\n * @param {ProjectionLike} projectionLike Either a code string which is\n * a combination of authority and identifier such as \"EPSG:4326\", or an\n * existing projection object, or undefined.\n * @return {Projection|null} Projection object, or null if not in list.\n * @api\n */\nexport function get(projectionLike) {\n return typeof projectionLike === 'string'\n ? getProj(/** @type {string} */ (projectionLike))\n : /** @type {Projection} */ (projectionLike) || null;\n}\n\n/**\n * Get the resolution of the point in degrees or distance units.\n * For projections with degrees as the unit this will simply return the\n * provided resolution. For other projections the point resolution is\n * by default estimated by transforming the `point` pixel to EPSG:4326,\n * measuring its width and height on the normal sphere,\n * and taking the average of the width and height.\n * A custom function can be provided for a specific projection, either\n * by setting the `getPointResolution` option in the\n * {@link module:ol/proj/Projection~Projection} constructor or by using\n * {@link module:ol/proj/Projection~Projection#setGetPointResolution} to change an existing\n * projection object.\n * @param {ProjectionLike} projection The projection.\n * @param {number} resolution Nominal resolution in projection units.\n * @param {import(\"./coordinate.js\").Coordinate} point Point to find adjusted resolution at.\n * @param {import(\"./proj/Units.js\").Units} [units] Units to get the point resolution in.\n * Default is the projection's units.\n * @return {number} Point resolution.\n * @api\n */\nexport function getPointResolution(projection, resolution, point, units) {\n projection = get(projection);\n let pointResolution;\n const getter = projection.getPointResolutionFunc();\n if (getter) {\n pointResolution = getter(resolution, point);\n if (units && units !== projection.getUnits()) {\n const metersPerUnit = projection.getMetersPerUnit();\n if (metersPerUnit) {\n pointResolution =\n (pointResolution * metersPerUnit) / METERS_PER_UNIT[units];\n }\n }\n } else {\n const projUnits = projection.getUnits();\n if ((projUnits == 'degrees' && !units) || units == 'degrees') {\n pointResolution = resolution;\n } else {\n // Estimate point resolution by transforming the center pixel to EPSG:4326,\n // measuring its width and height on the normal sphere, and taking the\n // average of the width and height.\n const toEPSG4326 = getTransformFromProjections(\n projection,\n get('EPSG:4326')\n );\n if (toEPSG4326 === identityTransform && projUnits !== 'degrees') {\n // no transform is available\n pointResolution = resolution * projection.getMetersPerUnit();\n } else {\n let vertices = [\n point[0] - resolution / 2,\n point[1],\n point[0] + resolution / 2,\n point[1],\n point[0],\n point[1] - resolution / 2,\n point[0],\n point[1] + resolution / 2,\n ];\n vertices = toEPSG4326(vertices, vertices, 2);\n const width = getDistance(vertices.slice(0, 2), vertices.slice(2, 4));\n const height = getDistance(vertices.slice(4, 6), vertices.slice(6, 8));\n pointResolution = (width + height) / 2;\n }\n const metersPerUnit = units\n ? METERS_PER_UNIT[units]\n : projection.getMetersPerUnit();\n if (metersPerUnit !== undefined) {\n pointResolution /= metersPerUnit;\n }\n }\n }\n return pointResolution;\n}\n\n/**\n * Registers transformation functions that don't alter coordinates. Those allow\n * to transform between projections with equal meaning.\n *\n * @param {Array} projections Projections.\n * @api\n */\nexport function addEquivalentProjections(projections) {\n addProjections(projections);\n projections.forEach(function (source) {\n projections.forEach(function (destination) {\n if (source !== destination) {\n addTransformFunc(source, destination, cloneTransform);\n }\n });\n });\n}\n\n/**\n * Registers transformation functions to convert coordinates in any projection\n * in projection1 to any projection in projection2.\n *\n * @param {Array} projections1 Projections with equal\n * meaning.\n * @param {Array} projections2 Projections with equal\n * meaning.\n * @param {TransformFunction} forwardTransform Transformation from any\n * projection in projection1 to any projection in projection2.\n * @param {TransformFunction} inverseTransform Transform from any projection\n * in projection2 to any projection in projection1..\n */\nexport function addEquivalentTransforms(\n projections1,\n projections2,\n forwardTransform,\n inverseTransform\n) {\n projections1.forEach(function (projection1) {\n projections2.forEach(function (projection2) {\n addTransformFunc(projection1, projection2, forwardTransform);\n addTransformFunc(projection2, projection1, inverseTransform);\n });\n });\n}\n\n/**\n * Clear all cached projections and transforms.\n */\nexport function clearAllProjections() {\n clearProj();\n clearTransformFuncs();\n}\n\n/**\n * @param {Projection|string|undefined} projection Projection.\n * @param {string} defaultCode Default code.\n * @return {Projection} Projection.\n */\nexport function createProjection(projection, defaultCode) {\n if (!projection) {\n return get(defaultCode);\n } else if (typeof projection === 'string') {\n return get(projection);\n }\n return /** @type {Projection} */ (projection);\n}\n\n/**\n * Creates a {@link module:ol/proj~TransformFunction} from a simple 2D coordinate transform\n * function.\n * @param {function(import(\"./coordinate.js\").Coordinate): import(\"./coordinate.js\").Coordinate} coordTransform Coordinate\n * transform.\n * @return {TransformFunction} Transform function.\n */\nexport function createTransformFromCoordinateTransform(coordTransform) {\n return (\n /**\n * @param {Array} input Input.\n * @param {Array} [output] Output.\n * @param {number} [dimension] Dimension.\n * @return {Array} Output.\n */\n function (input, output, dimension) {\n const length = input.length;\n dimension = dimension !== undefined ? dimension : 2;\n output = output !== undefined ? output : new Array(length);\n for (let i = 0; i < length; i += dimension) {\n const point = coordTransform(input.slice(i, i + dimension));\n const pointLength = point.length;\n for (let j = 0, jj = dimension; j < jj; ++j) {\n output[i + j] = j >= pointLength ? input[i + j] : point[j];\n }\n }\n return output;\n }\n );\n}\n\n/**\n * Registers coordinate transform functions to convert coordinates between the\n * source projection and the destination projection.\n * The forward and inverse functions convert coordinate pairs; this function\n * converts these into the functions used internally which also handle\n * extents and coordinate arrays.\n *\n * @param {ProjectionLike} source Source projection.\n * @param {ProjectionLike} destination Destination projection.\n * @param {function(import(\"./coordinate.js\").Coordinate): import(\"./coordinate.js\").Coordinate} forward The forward transform\n * function (that is, from the source projection to the destination\n * projection) that takes a {@link module:ol/coordinate~Coordinate} as argument and returns\n * the transformed {@link module:ol/coordinate~Coordinate}.\n * @param {function(import(\"./coordinate.js\").Coordinate): import(\"./coordinate.js\").Coordinate} inverse The inverse transform\n * function (that is, from the destination projection to the source\n * projection) that takes a {@link module:ol/coordinate~Coordinate} as argument and returns\n * the transformed {@link module:ol/coordinate~Coordinate}. If the transform function can only\n * transform less dimensions than the input coordinate, it is supposeed to return a coordinate\n * with only the length it can transform. The other dimensions will be taken unchanged from the\n * source.\n * @api\n */\nexport function addCoordinateTransforms(source, destination, forward, inverse) {\n const sourceProj = get(source);\n const destProj = get(destination);\n addTransformFunc(\n sourceProj,\n destProj,\n createTransformFromCoordinateTransform(forward)\n );\n addTransformFunc(\n destProj,\n sourceProj,\n createTransformFromCoordinateTransform(inverse)\n );\n}\n\n/**\n * Transforms a coordinate from longitude/latitude to a different projection.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate as longitude and latitude, i.e.\n * an array with longitude as 1st and latitude as 2nd element.\n * @param {ProjectionLike} [projection] Target projection. The\n * default is Web Mercator, i.e. 'EPSG:3857'.\n * @return {import(\"./coordinate.js\").Coordinate} Coordinate projected to the target projection.\n * @api\n */\nexport function fromLonLat(coordinate, projection) {\n disableCoordinateWarning();\n return transform(\n coordinate,\n 'EPSG:4326',\n projection !== undefined ? projection : 'EPSG:3857'\n );\n}\n\n/**\n * Transforms a coordinate to longitude/latitude.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Projected coordinate.\n * @param {ProjectionLike} [projection] Projection of the coordinate.\n * The default is Web Mercator, i.e. 'EPSG:3857'.\n * @return {import(\"./coordinate.js\").Coordinate} Coordinate as longitude and latitude, i.e. an array\n * with longitude as 1st and latitude as 2nd element.\n * @api\n */\nexport function toLonLat(coordinate, projection) {\n const lonLat = transform(\n coordinate,\n projection !== undefined ? projection : 'EPSG:3857',\n 'EPSG:4326'\n );\n const lon = lonLat[0];\n if (lon < -180 || lon > 180) {\n lonLat[0] = modulo(lon + 180, 360) - 180;\n }\n return lonLat;\n}\n\n/**\n * Checks if two projections are the same, that is every coordinate in one\n * projection does represent the same geographic point as the same coordinate in\n * the other projection.\n *\n * @param {Projection} projection1 Projection 1.\n * @param {Projection} projection2 Projection 2.\n * @return {boolean} Equivalent.\n * @api\n */\nexport function equivalent(projection1, projection2) {\n if (projection1 === projection2) {\n return true;\n }\n const equalUnits = projection1.getUnits() === projection2.getUnits();\n if (projection1.getCode() === projection2.getCode()) {\n return equalUnits;\n }\n const transformFunc = getTransformFromProjections(projection1, projection2);\n return transformFunc === cloneTransform && equalUnits;\n}\n\n/**\n * Searches in the list of transform functions for the function for converting\n * coordinates from the source projection to the destination projection.\n *\n * @param {Projection} sourceProjection Source Projection object.\n * @param {Projection} destinationProjection Destination Projection\n * object.\n * @return {TransformFunction} Transform function.\n */\nexport function getTransformFromProjections(\n sourceProjection,\n destinationProjection\n) {\n const sourceCode = sourceProjection.getCode();\n const destinationCode = destinationProjection.getCode();\n let transformFunc = getTransformFunc(sourceCode, destinationCode);\n if (!transformFunc) {\n transformFunc = identityTransform;\n }\n return transformFunc;\n}\n\n/**\n * Given the projection-like objects, searches for a transformation\n * function to convert a coordinates array from the source projection to the\n * destination projection.\n *\n * @param {ProjectionLike} source Source.\n * @param {ProjectionLike} destination Destination.\n * @return {TransformFunction} Transform function.\n * @api\n */\nexport function getTransform(source, destination) {\n const sourceProjection = get(source);\n const destinationProjection = get(destination);\n return getTransformFromProjections(sourceProjection, destinationProjection);\n}\n\n/**\n * Transforms a coordinate from source projection to destination projection.\n * This returns a new coordinate (and does not modify the original).\n *\n * See {@link module:ol/proj.transformExtent} for extent transformation.\n * See the transform method of {@link module:ol/geom/Geometry~Geometry} and its\n * subclasses for geometry transforms.\n *\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {ProjectionLike} source Source projection-like.\n * @param {ProjectionLike} destination Destination projection-like.\n * @return {import(\"./coordinate.js\").Coordinate} Coordinate.\n * @api\n */\nexport function transform(coordinate, source, destination) {\n const transformFunc = getTransform(source, destination);\n return transformFunc(coordinate, undefined, coordinate.length);\n}\n\n/**\n * Transforms an extent from source projection to destination projection. This\n * returns a new extent (and does not modify the original).\n *\n * @param {import(\"./extent.js\").Extent} extent The extent to transform.\n * @param {ProjectionLike} source Source projection-like.\n * @param {ProjectionLike} destination Destination projection-like.\n * @param {number} [stops] Number of stops per side used for the transform.\n * By default only the corners are used.\n * @return {import(\"./extent.js\").Extent} The transformed extent.\n * @api\n */\nexport function transformExtent(extent, source, destination, stops) {\n const transformFunc = getTransform(source, destination);\n return applyTransform(extent, transformFunc, undefined, stops);\n}\n\n/**\n * Transforms the given point to the destination projection.\n *\n * @param {import(\"./coordinate.js\").Coordinate} point Point.\n * @param {Projection} sourceProjection Source projection.\n * @param {Projection} destinationProjection Destination projection.\n * @return {import(\"./coordinate.js\").Coordinate} Point.\n */\nexport function transformWithProjections(\n point,\n sourceProjection,\n destinationProjection\n) {\n const transformFunc = getTransformFromProjections(\n sourceProjection,\n destinationProjection\n );\n return transformFunc(point);\n}\n\n/**\n * @type {Projection|null}\n */\nlet userProjection = null;\n\n/**\n * Set the projection for coordinates supplied from and returned by API methods.\n * This includes all API methods except for those interacting with tile grids.\n * @param {ProjectionLike} projection The user projection.\n * @api\n */\nexport function setUserProjection(projection) {\n userProjection = get(projection);\n}\n\n/**\n * Clear the user projection if set.\n * @api\n */\nexport function clearUserProjection() {\n userProjection = null;\n}\n\n/**\n * Get the projection for coordinates supplied from and returned by API methods.\n * Note that this method is not yet a part of the stable API. Support for user\n * projections is not yet complete and should be considered experimental.\n * @return {Projection|null} The user projection (or null if not set).\n * @api\n */\nexport function getUserProjection() {\n return userProjection;\n}\n\n/**\n * Use geographic coordinates (WGS-84 datum) in API methods. This includes all API\n * methods except for those interacting with tile grids.\n * @api\n */\nexport function useGeographic() {\n setUserProjection('EPSG:4326');\n}\n\n/**\n * Return a coordinate transformed into the user projection. If no user projection\n * is set, the original coordinate is returned.\n * @param {Array} coordinate Input coordinate.\n * @param {ProjectionLike} sourceProjection The input coordinate projection.\n * @return {Array} The input coordinate in the user projection.\n */\nexport function toUserCoordinate(coordinate, sourceProjection) {\n if (!userProjection) {\n return coordinate;\n }\n return transform(coordinate, sourceProjection, userProjection);\n}\n\n/**\n * Return a coordinate transformed from the user projection. If no user projection\n * is set, the original coordinate is returned.\n * @param {Array} coordinate Input coordinate.\n * @param {ProjectionLike} destProjection The destination projection.\n * @return {Array} The input coordinate transformed.\n */\nexport function fromUserCoordinate(coordinate, destProjection) {\n if (!userProjection) {\n if (\n showCoordinateWarning &&\n !equals(coordinate, [0, 0]) &&\n coordinate[0] >= -180 &&\n coordinate[0] <= 180 &&\n coordinate[1] >= -90 &&\n coordinate[1] <= 90\n ) {\n showCoordinateWarning = false;\n warn(\n 'Call useGeographic() from ol/proj once to work with [longitude, latitude] coordinates.'\n );\n }\n return coordinate;\n }\n return transform(coordinate, userProjection, destProjection);\n}\n\n/**\n * Return an extent transformed into the user projection. If no user projection\n * is set, the original extent is returned.\n * @param {import(\"./extent.js\").Extent} extent Input extent.\n * @param {ProjectionLike} sourceProjection The input extent projection.\n * @return {import(\"./extent.js\").Extent} The input extent in the user projection.\n */\nexport function toUserExtent(extent, sourceProjection) {\n if (!userProjection) {\n return extent;\n }\n return transformExtent(extent, sourceProjection, userProjection);\n}\n\n/**\n * Return an extent transformed from the user projection. If no user projection\n * is set, the original extent is returned.\n * @param {import(\"./extent.js\").Extent} extent Input extent.\n * @param {ProjectionLike} destProjection The destination projection.\n * @return {import(\"./extent.js\").Extent} The input extent transformed.\n */\nexport function fromUserExtent(extent, destProjection) {\n if (!userProjection) {\n return extent;\n }\n return transformExtent(extent, userProjection, destProjection);\n}\n\n/**\n * Return the resolution in user projection units per pixel. If no user projection\n * is set, or source or user projection are missing units, the original resolution\n * is returned.\n * @param {number} resolution Resolution in input projection units per pixel.\n * @param {ProjectionLike} sourceProjection The input projection.\n * @return {number} Resolution in user projection units per pixel.\n */\nexport function toUserResolution(resolution, sourceProjection) {\n if (!userProjection) {\n return resolution;\n }\n const sourceUnits = get(sourceProjection).getUnits();\n const userUnits = userProjection.getUnits();\n return sourceUnits && userUnits\n ? (resolution * METERS_PER_UNIT[sourceUnits]) / METERS_PER_UNIT[userUnits]\n : resolution;\n}\n\n/**\n * Return the resolution in user projection units per pixel. If no user projection\n * is set, or source or user projection are missing units, the original resolution\n * is returned.\n * @param {number} resolution Resolution in user projection units per pixel.\n * @param {ProjectionLike} destProjection The destination projection.\n * @return {number} Resolution in destination projection units per pixel.\n */\nexport function fromUserResolution(resolution, destProjection) {\n if (!userProjection) {\n return resolution;\n }\n const sourceUnits = get(destProjection).getUnits();\n const userUnits = userProjection.getUnits();\n return sourceUnits && userUnits\n ? (resolution * METERS_PER_UNIT[userUnits]) / METERS_PER_UNIT[sourceUnits]\n : resolution;\n}\n\n/**\n * Creates a safe coordinate transform function from a coordinate transform function.\n * \"Safe\" means that it can handle wrapping of x-coordinates for global projections,\n * and that coordinates exceeding the source projection validity extent's range will be\n * clamped to the validity range.\n * @param {Projection} sourceProj Source projection.\n * @param {Projection} destProj Destination projection.\n * @param {function(import(\"./coordinate.js\").Coordinate): import(\"./coordinate.js\").Coordinate} transform Transform function (source to destiation).\n * @return {function(import(\"./coordinate.js\").Coordinate): import(\"./coordinate.js\").Coordinate} Safe transform function (source to destiation).\n */\nexport function createSafeCoordinateTransform(sourceProj, destProj, transform) {\n return function (coord) {\n let transformed, worldsAway;\n if (sourceProj.canWrapX()) {\n const sourceExtent = sourceProj.getExtent();\n const sourceExtentWidth = getWidth(sourceExtent);\n coord = coord.slice(0);\n worldsAway = getWorldsAway(coord, sourceProj, sourceExtentWidth);\n if (worldsAway) {\n // Move x to the real world\n coord[0] = coord[0] - worldsAway * sourceExtentWidth;\n }\n coord[0] = clamp(coord[0], sourceExtent[0], sourceExtent[2]);\n coord[1] = clamp(coord[1], sourceExtent[1], sourceExtent[3]);\n transformed = transform(coord);\n } else {\n transformed = transform(coord);\n }\n if (worldsAway && destProj.canWrapX()) {\n // Move transformed coordinate back to the offset world\n transformed[0] += worldsAway * getWidth(destProj.getExtent());\n }\n return transformed;\n };\n}\n\n/**\n * Add transforms to and from EPSG:4326 and EPSG:3857. This function is called\n * by when this module is executed and should only need to be called again after\n * `clearAllProjections()` is called (e.g. in tests).\n */\nexport function addCommon() {\n // Add transformations that don't alter coordinates to convert within set of\n // projections with equal meaning.\n addEquivalentProjections(EPSG3857_PROJECTIONS);\n addEquivalentProjections(EPSG4326_PROJECTIONS);\n // Add transformations to convert EPSG:4326 like coordinates to EPSG:3857 like\n // coordinates and back.\n addEquivalentTransforms(\n EPSG4326_PROJECTIONS,\n EPSG3857_PROJECTIONS,\n fromEPSG4326,\n toEPSG4326\n );\n}\n\naddCommon();\n","/**\n * @module ol/geom/flat/transform\n */\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {import(\"../../transform.js\").Transform} transform Transform.\n * @param {Array} [dest] Destination.\n * @return {Array} Transformed coordinates.\n */\nexport function transform2D(\n flatCoordinates,\n offset,\n end,\n stride,\n transform,\n dest\n) {\n dest = dest ? dest : [];\n let i = 0;\n for (let j = offset; j < end; j += stride) {\n const x = flatCoordinates[j];\n const y = flatCoordinates[j + 1];\n dest[i++] = transform[0] * x + transform[2] * y + transform[4];\n dest[i++] = transform[1] * x + transform[3] * y + transform[5];\n }\n if (dest && dest.length != i) {\n dest.length = i;\n }\n return dest;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} angle Angle.\n * @param {Array} anchor Rotation anchor point.\n * @param {Array} [dest] Destination.\n * @return {Array} Transformed coordinates.\n */\nexport function rotate(\n flatCoordinates,\n offset,\n end,\n stride,\n angle,\n anchor,\n dest\n) {\n dest = dest ? dest : [];\n const cos = Math.cos(angle);\n const sin = Math.sin(angle);\n const anchorX = anchor[0];\n const anchorY = anchor[1];\n let i = 0;\n for (let j = offset; j < end; j += stride) {\n const deltaX = flatCoordinates[j] - anchorX;\n const deltaY = flatCoordinates[j + 1] - anchorY;\n dest[i++] = anchorX + deltaX * cos - deltaY * sin;\n dest[i++] = anchorY + deltaX * sin + deltaY * cos;\n for (let k = j + 2; k < j + stride; ++k) {\n dest[i++] = flatCoordinates[k];\n }\n }\n if (dest && dest.length != i) {\n dest.length = i;\n }\n return dest;\n}\n\n/**\n * Scale the coordinates.\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} sx Scale factor in the x-direction.\n * @param {number} sy Scale factor in the y-direction.\n * @param {Array} anchor Scale anchor point.\n * @param {Array} [dest] Destination.\n * @return {Array} Transformed coordinates.\n */\nexport function scale(\n flatCoordinates,\n offset,\n end,\n stride,\n sx,\n sy,\n anchor,\n dest\n) {\n dest = dest ? dest : [];\n const anchorX = anchor[0];\n const anchorY = anchor[1];\n let i = 0;\n for (let j = offset; j < end; j += stride) {\n const deltaX = flatCoordinates[j] - anchorX;\n const deltaY = flatCoordinates[j + 1] - anchorY;\n dest[i++] = anchorX + sx * deltaX;\n dest[i++] = anchorY + sy * deltaY;\n for (let k = j + 2; k < j + stride; ++k) {\n dest[i++] = flatCoordinates[k];\n }\n }\n if (dest && dest.length != i) {\n dest.length = i;\n }\n return dest;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} deltaX Delta X.\n * @param {number} deltaY Delta Y.\n * @param {Array} [dest] Destination.\n * @return {Array} Transformed coordinates.\n */\nexport function translate(\n flatCoordinates,\n offset,\n end,\n stride,\n deltaX,\n deltaY,\n dest\n) {\n dest = dest ? dest : [];\n let i = 0;\n for (let j = offset; j < end; j += stride) {\n dest[i++] = flatCoordinates[j] + deltaX;\n dest[i++] = flatCoordinates[j + 1] + deltaY;\n for (let k = j + 2; k < j + stride; ++k) {\n dest[i++] = flatCoordinates[k];\n }\n }\n if (dest && dest.length != i) {\n dest.length = i;\n }\n return dest;\n}\n","/**\n * @module ol/geom/Geometry\n */\nimport BaseObject from '../Object.js';\nimport {abstract} from '../util.js';\nimport {\n compose as composeTransform,\n create as createTransform,\n} from '../transform.js';\nimport {\n createEmpty,\n createOrUpdateEmpty,\n getHeight,\n returnOrUpdate,\n} from '../extent.js';\nimport {get as getProjection, getTransform} from '../proj.js';\nimport {memoizeOne} from '../functions.js';\nimport {transform2D} from './flat/transform.js';\n\n/**\n * @typedef {'XY' | 'XYZ' | 'XYM' | 'XYZM'} GeometryLayout\n * The coordinate layout for geometries, indicating whether a 3rd or 4th z ('Z')\n * or measure ('M') coordinate is available.\n */\n\n/**\n * @typedef {'Point' | 'LineString' | 'LinearRing' | 'Polygon' | 'MultiPoint' | 'MultiLineString' | 'MultiPolygon' | 'GeometryCollection' | 'Circle'} Type\n * The geometry type. One of `'Point'`, `'LineString'`, `'LinearRing'`,\n * `'Polygon'`, `'MultiPoint'`, `'MultiLineString'`, `'MultiPolygon'`,\n * `'GeometryCollection'`, or `'Circle'`.\n */\n\n/**\n * @type {import(\"../transform.js\").Transform}\n */\nconst tmpTransform = createTransform();\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for vector geometries.\n *\n * To get notified of changes to the geometry, register a listener for the\n * generic `change` event on your geometry instance.\n *\n * @abstract\n * @api\n */\nclass Geometry extends BaseObject {\n constructor() {\n super();\n\n /**\n * @private\n * @type {import(\"../extent.js\").Extent}\n */\n this.extent_ = createEmpty();\n\n /**\n * @private\n * @type {number}\n */\n this.extentRevision_ = -1;\n\n /**\n * @protected\n * @type {number}\n */\n this.simplifiedGeometryMaxMinSquaredTolerance = 0;\n\n /**\n * @protected\n * @type {number}\n */\n this.simplifiedGeometryRevision = 0;\n\n /**\n * Get a transformed and simplified version of the geometry.\n * @abstract\n * @param {number} revision The geometry revision.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {import(\"../proj.js\").TransformFunction} [transform] Optional transform function.\n * @return {Geometry} Simplified geometry.\n */\n this.simplifyTransformedInternal = memoizeOne(function (\n revision,\n squaredTolerance,\n transform\n ) {\n if (!transform) {\n return this.getSimplifiedGeometry(squaredTolerance);\n }\n const clone = this.clone();\n clone.applyTransform(transform);\n return clone.getSimplifiedGeometry(squaredTolerance);\n });\n }\n\n /**\n * Get a transformed and simplified version of the geometry.\n * @abstract\n * @param {number} squaredTolerance Squared tolerance.\n * @param {import(\"../proj.js\").TransformFunction} [transform] Optional transform function.\n * @return {Geometry} Simplified geometry.\n */\n simplifyTransformed(squaredTolerance, transform) {\n return this.simplifyTransformedInternal(\n this.getRevision(),\n squaredTolerance,\n transform\n );\n }\n\n /**\n * Make a complete copy of the geometry.\n * @abstract\n * @return {!Geometry} Clone.\n */\n clone() {\n return abstract();\n }\n\n /**\n * @abstract\n * @param {number} x X.\n * @param {number} y Y.\n * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @return {number} Minimum squared distance.\n */\n closestPointXY(x, y, closestPoint, minSquaredDistance) {\n return abstract();\n }\n\n /**\n * @param {number} x X.\n * @param {number} y Y.\n * @return {boolean} Contains (x, y).\n */\n containsXY(x, y) {\n const coord = this.getClosestPoint([x, y]);\n return coord[0] === x && coord[1] === y;\n }\n\n /**\n * Return the closest point of the geometry to the passed point as\n * {@link module:ol/coordinate~Coordinate coordinate}.\n * @param {import(\"../coordinate.js\").Coordinate} point Point.\n * @param {import(\"../coordinate.js\").Coordinate} [closestPoint] Closest point.\n * @return {import(\"../coordinate.js\").Coordinate} Closest point.\n * @api\n */\n getClosestPoint(point, closestPoint) {\n closestPoint = closestPoint ? closestPoint : [NaN, NaN];\n this.closestPointXY(point[0], point[1], closestPoint, Infinity);\n return closestPoint;\n }\n\n /**\n * Returns true if this geometry includes the specified coordinate. If the\n * coordinate is on the boundary of the geometry, returns false.\n * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n * @return {boolean} Contains coordinate.\n * @api\n */\n intersectsCoordinate(coordinate) {\n return this.containsXY(coordinate[0], coordinate[1]);\n }\n\n /**\n * @abstract\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @protected\n * @return {import(\"../extent.js\").Extent} extent Extent.\n */\n computeExtent(extent) {\n return abstract();\n }\n\n /**\n * Get the extent of the geometry.\n * @param {import(\"../extent.js\").Extent} [extent] Extent.\n * @return {import(\"../extent.js\").Extent} extent Extent.\n * @api\n */\n getExtent(extent) {\n if (this.extentRevision_ != this.getRevision()) {\n const extent = this.computeExtent(this.extent_);\n if (isNaN(extent[0]) || isNaN(extent[1])) {\n createOrUpdateEmpty(extent);\n }\n this.extentRevision_ = this.getRevision();\n }\n return returnOrUpdate(this.extent_, extent);\n }\n\n /**\n * Rotate the geometry around a given coordinate. This modifies the geometry\n * coordinates in place.\n * @abstract\n * @param {number} angle Rotation angle in radians.\n * @param {import(\"../coordinate.js\").Coordinate} anchor The rotation center.\n * @api\n */\n rotate(angle, anchor) {\n abstract();\n }\n\n /**\n * Scale the geometry (with an optional origin). This modifies the geometry\n * coordinates in place.\n * @abstract\n * @param {number} sx The scaling factor in the x-direction.\n * @param {number} [sy] The scaling factor in the y-direction (defaults to sx).\n * @param {import(\"../coordinate.js\").Coordinate} [anchor] The scale origin (defaults to the center\n * of the geometry extent).\n * @api\n */\n scale(sx, sy, anchor) {\n abstract();\n }\n\n /**\n * Create a simplified version of this geometry. For linestrings, this uses\n * the [Douglas Peucker](https://en.wikipedia.org/wiki/Ramer-Douglas-Peucker_algorithm)\n * algorithm. For polygons, a quantization-based\n * simplification is used to preserve topology.\n * @param {number} tolerance The tolerance distance for simplification.\n * @return {Geometry} A new, simplified version of the original geometry.\n * @api\n */\n simplify(tolerance) {\n return this.getSimplifiedGeometry(tolerance * tolerance);\n }\n\n /**\n * Create a simplified version of this geometry using the Douglas Peucker\n * algorithm.\n * See https://en.wikipedia.org/wiki/Ramer-Douglas-Peucker_algorithm.\n * @abstract\n * @param {number} squaredTolerance Squared tolerance.\n * @return {Geometry} Simplified geometry.\n */\n getSimplifiedGeometry(squaredTolerance) {\n return abstract();\n }\n\n /**\n * Get the type of this geometry.\n * @abstract\n * @return {Type} Geometry type.\n */\n getType() {\n return abstract();\n }\n\n /**\n * Apply a transform function to the coordinates of the geometry.\n * The geometry is modified in place.\n * If you do not want the geometry modified in place, first `clone()` it and\n * then use this function on the clone.\n * @abstract\n * @param {import(\"../proj.js\").TransformFunction} transformFn Transform function.\n * Called with a flat array of geometry coordinates.\n */\n applyTransform(transformFn) {\n abstract();\n }\n\n /**\n * Test if the geometry and the passed extent intersect.\n * @abstract\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @return {boolean} `true` if the geometry and the extent intersect.\n */\n intersectsExtent(extent) {\n return abstract();\n }\n\n /**\n * Translate the geometry. This modifies the geometry coordinates in place. If\n * instead you want a new geometry, first `clone()` this geometry.\n * @abstract\n * @param {number} deltaX Delta X.\n * @param {number} deltaY Delta Y.\n * @api\n */\n translate(deltaX, deltaY) {\n abstract();\n }\n\n /**\n * Transform each coordinate of the geometry from one coordinate reference\n * system to another. The geometry is modified in place.\n * For example, a line will be transformed to a line and a circle to a circle.\n * If you do not want the geometry modified in place, first `clone()` it and\n * then use this function on the clone.\n *\n * @param {import(\"../proj.js\").ProjectionLike} source The current projection. Can be a\n * string identifier or a {@link module:ol/proj/Projection~Projection} object.\n * @param {import(\"../proj.js\").ProjectionLike} destination The desired projection. Can be a\n * string identifier or a {@link module:ol/proj/Projection~Projection} object.\n * @return {Geometry} This geometry. Note that original geometry is\n * modified in place.\n * @api\n */\n transform(source, destination) {\n /** @type {import(\"../proj/Projection.js\").default} */\n const sourceProj = getProjection(source);\n const transformFn =\n sourceProj.getUnits() == 'tile-pixels'\n ? function (inCoordinates, outCoordinates, stride) {\n const pixelExtent = sourceProj.getExtent();\n const projectedExtent = sourceProj.getWorldExtent();\n const scale = getHeight(projectedExtent) / getHeight(pixelExtent);\n composeTransform(\n tmpTransform,\n projectedExtent[0],\n projectedExtent[3],\n scale,\n -scale,\n 0,\n 0,\n 0\n );\n transform2D(\n inCoordinates,\n 0,\n inCoordinates.length,\n stride,\n tmpTransform,\n outCoordinates\n );\n return getTransform(sourceProj, destination)(\n inCoordinates,\n outCoordinates,\n stride\n );\n }\n : getTransform(sourceProj, destination);\n this.applyTransform(transformFn);\n return this;\n }\n}\n\nexport default Geometry;\n","/**\n * @module ol/geom/SimpleGeometry\n */\nimport Geometry from './Geometry.js';\nimport {abstract} from '../util.js';\nimport {createOrUpdateFromFlatCoordinates, getCenter} from '../extent.js';\nimport {rotate, scale, transform2D, translate} from './flat/transform.js';\n\n/**\n * @classdesc\n * Abstract base class; only used for creating subclasses; do not instantiate\n * in apps, as cannot be rendered.\n *\n * @abstract\n * @api\n */\nclass SimpleGeometry extends Geometry {\n constructor() {\n super();\n\n /**\n * @protected\n * @type {import(\"./Geometry.js\").GeometryLayout}\n */\n this.layout = 'XY';\n\n /**\n * @protected\n * @type {number}\n */\n this.stride = 2;\n\n /**\n * @protected\n * @type {Array}\n */\n this.flatCoordinates = null;\n }\n\n /**\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @protected\n * @return {import(\"../extent.js\").Extent} extent Extent.\n */\n computeExtent(extent) {\n return createOrUpdateFromFlatCoordinates(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n extent\n );\n }\n\n /**\n * @abstract\n * @return {Array<*> | null} Coordinates.\n */\n getCoordinates() {\n return abstract();\n }\n\n /**\n * Return the first coordinate of the geometry.\n * @return {import(\"../coordinate.js\").Coordinate} First coordinate.\n * @api\n */\n getFirstCoordinate() {\n return this.flatCoordinates.slice(0, this.stride);\n }\n\n /**\n * @return {Array} Flat coordinates.\n */\n getFlatCoordinates() {\n return this.flatCoordinates;\n }\n\n /**\n * Return the last coordinate of the geometry.\n * @return {import(\"../coordinate.js\").Coordinate} Last point.\n * @api\n */\n getLastCoordinate() {\n return this.flatCoordinates.slice(\n this.flatCoordinates.length - this.stride\n );\n }\n\n /**\n * Return the {@link import(\"./Geometry.js\").GeometryLayout layout} of the geometry.\n * @return {import(\"./Geometry.js\").GeometryLayout} Layout.\n * @api\n */\n getLayout() {\n return this.layout;\n }\n\n /**\n * Create a simplified version of this geometry using the Douglas Peucker algorithm.\n * @param {number} squaredTolerance Squared tolerance.\n * @return {SimpleGeometry} Simplified geometry.\n */\n getSimplifiedGeometry(squaredTolerance) {\n if (this.simplifiedGeometryRevision !== this.getRevision()) {\n this.simplifiedGeometryMaxMinSquaredTolerance = 0;\n this.simplifiedGeometryRevision = this.getRevision();\n }\n // If squaredTolerance is negative or if we know that simplification will not\n // have any effect then just return this.\n if (\n squaredTolerance < 0 ||\n (this.simplifiedGeometryMaxMinSquaredTolerance !== 0 &&\n squaredTolerance <= this.simplifiedGeometryMaxMinSquaredTolerance)\n ) {\n return this;\n }\n\n const simplifiedGeometry =\n this.getSimplifiedGeometryInternal(squaredTolerance);\n const simplifiedFlatCoordinates = simplifiedGeometry.getFlatCoordinates();\n if (simplifiedFlatCoordinates.length < this.flatCoordinates.length) {\n return simplifiedGeometry;\n }\n // Simplification did not actually remove any coordinates. We now know\n // that any calls to getSimplifiedGeometry with a squaredTolerance less\n // than or equal to the current squaredTolerance will also not have any\n // effect. This allows us to short circuit simplification (saving CPU\n // cycles) and prevents the cache of simplified geometries from filling\n // up with useless identical copies of this geometry (saving memory).\n this.simplifiedGeometryMaxMinSquaredTolerance = squaredTolerance;\n return this;\n }\n\n /**\n * @param {number} squaredTolerance Squared tolerance.\n * @return {SimpleGeometry} Simplified geometry.\n * @protected\n */\n getSimplifiedGeometryInternal(squaredTolerance) {\n return this;\n }\n\n /**\n * @return {number} Stride.\n */\n getStride() {\n return this.stride;\n }\n\n /**\n * @param {import(\"./Geometry.js\").GeometryLayout} layout Layout.\n * @param {Array} flatCoordinates Flat coordinates.\n */\n setFlatCoordinates(layout, flatCoordinates) {\n this.stride = getStrideForLayout(layout);\n this.layout = layout;\n this.flatCoordinates = flatCoordinates;\n }\n\n /**\n * @abstract\n * @param {!Array<*>} coordinates Coordinates.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n */\n setCoordinates(coordinates, layout) {\n abstract();\n }\n\n /**\n * @param {import(\"./Geometry.js\").GeometryLayout|undefined} layout Layout.\n * @param {Array<*>} coordinates Coordinates.\n * @param {number} nesting Nesting.\n * @protected\n */\n setLayout(layout, coordinates, nesting) {\n /** @type {number} */\n let stride;\n if (layout) {\n stride = getStrideForLayout(layout);\n } else {\n for (let i = 0; i < nesting; ++i) {\n if (coordinates.length === 0) {\n this.layout = 'XY';\n this.stride = 2;\n return;\n }\n coordinates = /** @type {Array} */ (coordinates[0]);\n }\n stride = coordinates.length;\n layout = getLayoutForStride(stride);\n }\n this.layout = layout;\n this.stride = stride;\n }\n\n /**\n * Apply a transform function to the coordinates of the geometry.\n * The geometry is modified in place.\n * If you do not want the geometry modified in place, first `clone()` it and\n * then use this function on the clone.\n * @param {import(\"../proj.js\").TransformFunction} transformFn Transform function.\n * Called with a flat array of geometry coordinates.\n * @api\n */\n applyTransform(transformFn) {\n if (this.flatCoordinates) {\n transformFn(this.flatCoordinates, this.flatCoordinates, this.stride);\n this.changed();\n }\n }\n\n /**\n * Rotate the geometry around a given coordinate. This modifies the geometry\n * coordinates in place.\n * @param {number} angle Rotation angle in counter-clockwise radians.\n * @param {import(\"../coordinate.js\").Coordinate} anchor The rotation center.\n * @api\n */\n rotate(angle, anchor) {\n const flatCoordinates = this.getFlatCoordinates();\n if (flatCoordinates) {\n const stride = this.getStride();\n rotate(\n flatCoordinates,\n 0,\n flatCoordinates.length,\n stride,\n angle,\n anchor,\n flatCoordinates\n );\n this.changed();\n }\n }\n\n /**\n * Scale the geometry (with an optional origin). This modifies the geometry\n * coordinates in place.\n * @param {number} sx The scaling factor in the x-direction.\n * @param {number} [sy] The scaling factor in the y-direction (defaults to sx).\n * @param {import(\"../coordinate.js\").Coordinate} [anchor] The scale origin (defaults to the center\n * of the geometry extent).\n * @api\n */\n scale(sx, sy, anchor) {\n if (sy === undefined) {\n sy = sx;\n }\n if (!anchor) {\n anchor = getCenter(this.getExtent());\n }\n const flatCoordinates = this.getFlatCoordinates();\n if (flatCoordinates) {\n const stride = this.getStride();\n scale(\n flatCoordinates,\n 0,\n flatCoordinates.length,\n stride,\n sx,\n sy,\n anchor,\n flatCoordinates\n );\n this.changed();\n }\n }\n\n /**\n * Translate the geometry. This modifies the geometry coordinates in place. If\n * instead you want a new geometry, first `clone()` this geometry.\n * @param {number} deltaX Delta X.\n * @param {number} deltaY Delta Y.\n * @api\n */\n translate(deltaX, deltaY) {\n const flatCoordinates = this.getFlatCoordinates();\n if (flatCoordinates) {\n const stride = this.getStride();\n translate(\n flatCoordinates,\n 0,\n flatCoordinates.length,\n stride,\n deltaX,\n deltaY,\n flatCoordinates\n );\n this.changed();\n }\n }\n}\n\n/**\n * @param {number} stride Stride.\n * @return {import(\"./Geometry.js\").GeometryLayout} layout Layout.\n */\nfunction getLayoutForStride(stride) {\n let layout;\n if (stride == 2) {\n layout = 'XY';\n } else if (stride == 3) {\n layout = 'XYZ';\n } else if (stride == 4) {\n layout = 'XYZM';\n }\n return /** @type {import(\"./Geometry.js\").GeometryLayout} */ (layout);\n}\n\n/**\n * @param {import(\"./Geometry.js\").GeometryLayout} layout Layout.\n * @return {number} Stride.\n */\nexport function getStrideForLayout(layout) {\n let stride;\n if (layout == 'XY') {\n stride = 2;\n } else if (layout == 'XYZ' || layout == 'XYM') {\n stride = 3;\n } else if (layout == 'XYZM') {\n stride = 4;\n }\n return /** @type {number} */ (stride);\n}\n\n/**\n * @param {SimpleGeometry} simpleGeometry Simple geometry.\n * @param {import(\"../transform.js\").Transform} transform Transform.\n * @param {Array} [dest] Destination.\n * @return {Array} Transformed flat coordinates.\n */\nexport function transformGeom2D(simpleGeometry, transform, dest) {\n const flatCoordinates = simpleGeometry.getFlatCoordinates();\n if (!flatCoordinates) {\n return null;\n }\n const stride = simpleGeometry.getStride();\n return transform2D(\n flatCoordinates,\n 0,\n flatCoordinates.length,\n stride,\n transform,\n dest\n );\n}\n\nexport default SimpleGeometry;\n","/**\n * @module ol/geom/flat/closest\n */\nimport {lerp, squaredDistance as squaredDx} from '../../math.js';\n\n/**\n * Returns the point on the 2D line segment flatCoordinates[offset1] to\n * flatCoordinates[offset2] that is closest to the point (x, y). Extra\n * dimensions are linearly interpolated.\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset1 Offset 1.\n * @param {number} offset2 Offset 2.\n * @param {number} stride Stride.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {Array} closestPoint Closest point.\n */\nfunction assignClosest(\n flatCoordinates,\n offset1,\n offset2,\n stride,\n x,\n y,\n closestPoint\n) {\n const x1 = flatCoordinates[offset1];\n const y1 = flatCoordinates[offset1 + 1];\n const dx = flatCoordinates[offset2] - x1;\n const dy = flatCoordinates[offset2 + 1] - y1;\n let offset;\n if (dx === 0 && dy === 0) {\n offset = offset1;\n } else {\n const t = ((x - x1) * dx + (y - y1) * dy) / (dx * dx + dy * dy);\n if (t > 1) {\n offset = offset2;\n } else if (t > 0) {\n for (let i = 0; i < stride; ++i) {\n closestPoint[i] = lerp(\n flatCoordinates[offset1 + i],\n flatCoordinates[offset2 + i],\n t\n );\n }\n closestPoint.length = stride;\n return;\n } else {\n offset = offset1;\n }\n }\n for (let i = 0; i < stride; ++i) {\n closestPoint[i] = flatCoordinates[offset + i];\n }\n closestPoint.length = stride;\n}\n\n/**\n * Return the squared of the largest distance between any pair of consecutive\n * coordinates.\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} max Max squared delta.\n * @return {number} Max squared delta.\n */\nexport function maxSquaredDelta(flatCoordinates, offset, end, stride, max) {\n let x1 = flatCoordinates[offset];\n let y1 = flatCoordinates[offset + 1];\n for (offset += stride; offset < end; offset += stride) {\n const x2 = flatCoordinates[offset];\n const y2 = flatCoordinates[offset + 1];\n const squaredDelta = squaredDx(x1, y1, x2, y2);\n if (squaredDelta > max) {\n max = squaredDelta;\n }\n x1 = x2;\n y1 = y2;\n }\n return max;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {number} max Max squared delta.\n * @return {number} Max squared delta.\n */\nexport function arrayMaxSquaredDelta(\n flatCoordinates,\n offset,\n ends,\n stride,\n max\n) {\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n max = maxSquaredDelta(flatCoordinates, offset, end, stride, max);\n offset = end;\n }\n return max;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} max Max squared delta.\n * @return {number} Max squared delta.\n */\nexport function multiArrayMaxSquaredDelta(\n flatCoordinates,\n offset,\n endss,\n stride,\n max\n) {\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n max = arrayMaxSquaredDelta(flatCoordinates, offset, ends, stride, max);\n offset = ends[ends.length - 1];\n }\n return max;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} maxDelta Max delta.\n * @param {boolean} isRing Is ring.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {Array} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @param {Array} [tmpPoint] Temporary point object.\n * @return {number} Minimum squared distance.\n */\nexport function assignClosestPoint(\n flatCoordinates,\n offset,\n end,\n stride,\n maxDelta,\n isRing,\n x,\n y,\n closestPoint,\n minSquaredDistance,\n tmpPoint\n) {\n if (offset == end) {\n return minSquaredDistance;\n }\n let i, squaredDistance;\n if (maxDelta === 0) {\n // All points are identical, so just test the first point.\n squaredDistance = squaredDx(\n x,\n y,\n flatCoordinates[offset],\n flatCoordinates[offset + 1]\n );\n if (squaredDistance < minSquaredDistance) {\n for (i = 0; i < stride; ++i) {\n closestPoint[i] = flatCoordinates[offset + i];\n }\n closestPoint.length = stride;\n return squaredDistance;\n }\n return minSquaredDistance;\n }\n tmpPoint = tmpPoint ? tmpPoint : [NaN, NaN];\n let index = offset + stride;\n while (index < end) {\n assignClosest(\n flatCoordinates,\n index - stride,\n index,\n stride,\n x,\n y,\n tmpPoint\n );\n squaredDistance = squaredDx(x, y, tmpPoint[0], tmpPoint[1]);\n if (squaredDistance < minSquaredDistance) {\n minSquaredDistance = squaredDistance;\n for (i = 0; i < stride; ++i) {\n closestPoint[i] = tmpPoint[i];\n }\n closestPoint.length = stride;\n index += stride;\n } else {\n // Skip ahead multiple points, because we know that all the skipped\n // points cannot be any closer than the closest point we have found so\n // far. We know this because we know how close the current point is, how\n // close the closest point we have found so far is, and the maximum\n // distance between consecutive points. For example, if we're currently\n // at distance 10, the best we've found so far is 3, and that the maximum\n // distance between consecutive points is 2, then we'll need to skip at\n // least (10 - 3) / 2 == 3 (rounded down) points to have any chance of\n // finding a closer point. We use Math.max(..., 1) to ensure that we\n // always advance at least one point, to avoid an infinite loop.\n index +=\n stride *\n Math.max(\n ((Math.sqrt(squaredDistance) - Math.sqrt(minSquaredDistance)) /\n maxDelta) |\n 0,\n 1\n );\n }\n }\n if (isRing) {\n // Check the closing segment.\n assignClosest(\n flatCoordinates,\n end - stride,\n offset,\n stride,\n x,\n y,\n tmpPoint\n );\n squaredDistance = squaredDx(x, y, tmpPoint[0], tmpPoint[1]);\n if (squaredDistance < minSquaredDistance) {\n minSquaredDistance = squaredDistance;\n for (i = 0; i < stride; ++i) {\n closestPoint[i] = tmpPoint[i];\n }\n closestPoint.length = stride;\n }\n }\n return minSquaredDistance;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {number} maxDelta Max delta.\n * @param {boolean} isRing Is ring.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {Array} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @param {Array} [tmpPoint] Temporary point object.\n * @return {number} Minimum squared distance.\n */\nexport function assignClosestArrayPoint(\n flatCoordinates,\n offset,\n ends,\n stride,\n maxDelta,\n isRing,\n x,\n y,\n closestPoint,\n minSquaredDistance,\n tmpPoint\n) {\n tmpPoint = tmpPoint ? tmpPoint : [NaN, NaN];\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n minSquaredDistance = assignClosestPoint(\n flatCoordinates,\n offset,\n end,\n stride,\n maxDelta,\n isRing,\n x,\n y,\n closestPoint,\n minSquaredDistance,\n tmpPoint\n );\n offset = end;\n }\n return minSquaredDistance;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} maxDelta Max delta.\n * @param {boolean} isRing Is ring.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {Array} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @param {Array} [tmpPoint] Temporary point object.\n * @return {number} Minimum squared distance.\n */\nexport function assignClosestMultiArrayPoint(\n flatCoordinates,\n offset,\n endss,\n stride,\n maxDelta,\n isRing,\n x,\n y,\n closestPoint,\n minSquaredDistance,\n tmpPoint\n) {\n tmpPoint = tmpPoint ? tmpPoint : [NaN, NaN];\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n minSquaredDistance = assignClosestArrayPoint(\n flatCoordinates,\n offset,\n ends,\n stride,\n maxDelta,\n isRing,\n x,\n y,\n closestPoint,\n minSquaredDistance,\n tmpPoint\n );\n offset = ends[ends.length - 1];\n }\n return minSquaredDistance;\n}\n","/**\n * @module ol/geom/flat/deflate\n */\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {import(\"../../coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {number} stride Stride.\n * @return {number} offset Offset.\n */\nexport function deflateCoordinate(flatCoordinates, offset, coordinate, stride) {\n for (let i = 0, ii = coordinate.length; i < ii; ++i) {\n flatCoordinates[offset++] = coordinate[i];\n }\n return offset;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} coordinates Coordinates.\n * @param {number} stride Stride.\n * @return {number} offset Offset.\n */\nexport function deflateCoordinates(\n flatCoordinates,\n offset,\n coordinates,\n stride\n) {\n for (let i = 0, ii = coordinates.length; i < ii; ++i) {\n const coordinate = coordinates[i];\n for (let j = 0; j < stride; ++j) {\n flatCoordinates[offset++] = coordinate[j];\n }\n }\n return offset;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} coordinatess Coordinatess.\n * @param {number} stride Stride.\n * @param {Array} [ends] Ends.\n * @return {Array} Ends.\n */\nexport function deflateCoordinatesArray(\n flatCoordinates,\n offset,\n coordinatess,\n stride,\n ends\n) {\n ends = ends ? ends : [];\n let i = 0;\n for (let j = 0, jj = coordinatess.length; j < jj; ++j) {\n const end = deflateCoordinates(\n flatCoordinates,\n offset,\n coordinatess[j],\n stride\n );\n ends[i++] = end;\n offset = end;\n }\n ends.length = i;\n return ends;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>>} coordinatesss Coordinatesss.\n * @param {number} stride Stride.\n * @param {Array>} [endss] Endss.\n * @return {Array>} Endss.\n */\nexport function deflateMultiCoordinatesArray(\n flatCoordinates,\n offset,\n coordinatesss,\n stride,\n endss\n) {\n endss = endss ? endss : [];\n let i = 0;\n for (let j = 0, jj = coordinatesss.length; j < jj; ++j) {\n const ends = deflateCoordinatesArray(\n flatCoordinates,\n offset,\n coordinatesss[j],\n stride,\n endss[i]\n );\n if (ends.length === 0) {\n ends[0] = offset;\n }\n endss[i++] = ends;\n offset = ends[ends.length - 1];\n }\n endss.length = i;\n return endss;\n}\n","/**\n * @module ol/geom/flat/simplify\n */\n// Based on simplify-js https://github.com/mourner/simplify-js\n// Copyright (c) 2012, Vladimir Agafonkin\n// All rights reserved.\n//\n// Redistribution and use in source and binary forms, with or without\n// modification, are permitted provided that the following conditions are met:\n//\n// 1. Redistributions of source code must retain the above copyright notice,\n// this list of conditions and the following disclaimer.\n//\n// 2. Redistributions in binary form must reproduce the above copyright\n// notice, this list of conditions and the following disclaimer in the\n// documentation and/or other materials provided with the distribution.\n//\n// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \"AS IS\"\n// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\n// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\n// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE\n// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR\n// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF\n// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS\n// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN\n// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)\n// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE\n// POSSIBILITY OF SUCH DAMAGE.\n\nimport {squaredDistance, squaredSegmentDistance} from '../../math.js';\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {boolean} highQuality Highest quality.\n * @param {Array} [simplifiedFlatCoordinates] Simplified flat\n * coordinates.\n * @return {Array} Simplified line string.\n */\nexport function simplifyLineString(\n flatCoordinates,\n offset,\n end,\n stride,\n squaredTolerance,\n highQuality,\n simplifiedFlatCoordinates\n) {\n simplifiedFlatCoordinates =\n simplifiedFlatCoordinates !== undefined ? simplifiedFlatCoordinates : [];\n if (!highQuality) {\n end = radialDistance(\n flatCoordinates,\n offset,\n end,\n stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n 0\n );\n flatCoordinates = simplifiedFlatCoordinates;\n offset = 0;\n stride = 2;\n }\n simplifiedFlatCoordinates.length = douglasPeucker(\n flatCoordinates,\n offset,\n end,\n stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n 0\n );\n return simplifiedFlatCoordinates;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {Array} simplifiedFlatCoordinates Simplified flat\n * coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @return {number} Simplified offset.\n */\nexport function douglasPeucker(\n flatCoordinates,\n offset,\n end,\n stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset\n) {\n const n = (end - offset) / stride;\n if (n < 3) {\n for (; offset < end; offset += stride) {\n simplifiedFlatCoordinates[simplifiedOffset++] = flatCoordinates[offset];\n simplifiedFlatCoordinates[simplifiedOffset++] =\n flatCoordinates[offset + 1];\n }\n return simplifiedOffset;\n }\n /** @type {Array} */\n const markers = new Array(n);\n markers[0] = 1;\n markers[n - 1] = 1;\n /** @type {Array} */\n const stack = [offset, end - stride];\n let index = 0;\n while (stack.length > 0) {\n const last = stack.pop();\n const first = stack.pop();\n let maxSquaredDistance = 0;\n const x1 = flatCoordinates[first];\n const y1 = flatCoordinates[first + 1];\n const x2 = flatCoordinates[last];\n const y2 = flatCoordinates[last + 1];\n for (let i = first + stride; i < last; i += stride) {\n const x = flatCoordinates[i];\n const y = flatCoordinates[i + 1];\n const squaredDistance = squaredSegmentDistance(x, y, x1, y1, x2, y2);\n if (squaredDistance > maxSquaredDistance) {\n index = i;\n maxSquaredDistance = squaredDistance;\n }\n }\n if (maxSquaredDistance > squaredTolerance) {\n markers[(index - offset) / stride] = 1;\n if (first + stride < index) {\n stack.push(first, index);\n }\n if (index + stride < last) {\n stack.push(index, last);\n }\n }\n }\n for (let i = 0; i < n; ++i) {\n if (markers[i]) {\n simplifiedFlatCoordinates[simplifiedOffset++] =\n flatCoordinates[offset + i * stride];\n simplifiedFlatCoordinates[simplifiedOffset++] =\n flatCoordinates[offset + i * stride + 1];\n }\n }\n return simplifiedOffset;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {Array} simplifiedFlatCoordinates Simplified flat\n * coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @param {Array} simplifiedEnds Simplified ends.\n * @return {number} Simplified offset.\n */\nexport function douglasPeuckerArray(\n flatCoordinates,\n offset,\n ends,\n stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset,\n simplifiedEnds\n) {\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n simplifiedOffset = douglasPeucker(\n flatCoordinates,\n offset,\n end,\n stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset\n );\n simplifiedEnds.push(simplifiedOffset);\n offset = end;\n }\n return simplifiedOffset;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {Array} simplifiedFlatCoordinates Simplified flat\n * coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @param {Array>} simplifiedEndss Simplified endss.\n * @return {number} Simplified offset.\n */\nexport function douglasPeuckerMultiArray(\n flatCoordinates,\n offset,\n endss,\n stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset,\n simplifiedEndss\n) {\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n const simplifiedEnds = [];\n simplifiedOffset = douglasPeuckerArray(\n flatCoordinates,\n offset,\n ends,\n stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset,\n simplifiedEnds\n );\n simplifiedEndss.push(simplifiedEnds);\n offset = ends[ends.length - 1];\n }\n return simplifiedOffset;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {Array} simplifiedFlatCoordinates Simplified flat\n * coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @return {number} Simplified offset.\n */\nexport function radialDistance(\n flatCoordinates,\n offset,\n end,\n stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset\n) {\n if (end <= offset + stride) {\n // zero or one point, no simplification possible, so copy and return\n for (; offset < end; offset += stride) {\n simplifiedFlatCoordinates[simplifiedOffset++] = flatCoordinates[offset];\n simplifiedFlatCoordinates[simplifiedOffset++] =\n flatCoordinates[offset + 1];\n }\n return simplifiedOffset;\n }\n let x1 = flatCoordinates[offset];\n let y1 = flatCoordinates[offset + 1];\n // copy first point\n simplifiedFlatCoordinates[simplifiedOffset++] = x1;\n simplifiedFlatCoordinates[simplifiedOffset++] = y1;\n let x2 = x1;\n let y2 = y1;\n for (offset += stride; offset < end; offset += stride) {\n x2 = flatCoordinates[offset];\n y2 = flatCoordinates[offset + 1];\n if (squaredDistance(x1, y1, x2, y2) > squaredTolerance) {\n // copy point at offset\n simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n x1 = x2;\n y1 = y2;\n }\n }\n if (x2 != x1 || y2 != y1) {\n // copy last point\n simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n }\n return simplifiedOffset;\n}\n\n/**\n * @param {number} value Value.\n * @param {number} tolerance Tolerance.\n * @return {number} Rounded value.\n */\nexport function snap(value, tolerance) {\n return tolerance * Math.round(value / tolerance);\n}\n\n/**\n * Simplifies a line string using an algorithm designed by Tim Schaub.\n * Coordinates are snapped to the nearest value in a virtual grid and\n * consecutive duplicate coordinates are discarded. This effectively preserves\n * topology as the simplification of any subsection of a line string is\n * independent of the rest of the line string. This means that, for examples,\n * the common edge between two polygons will be simplified to the same line\n * string independently in both polygons. This implementation uses a single\n * pass over the coordinates and eliminates intermediate collinear points.\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} tolerance Tolerance.\n * @param {Array} simplifiedFlatCoordinates Simplified flat\n * coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @return {number} Simplified offset.\n */\nexport function quantize(\n flatCoordinates,\n offset,\n end,\n stride,\n tolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset\n) {\n // do nothing if the line is empty\n if (offset == end) {\n return simplifiedOffset;\n }\n // snap the first coordinate (P1)\n let x1 = snap(flatCoordinates[offset], tolerance);\n let y1 = snap(flatCoordinates[offset + 1], tolerance);\n offset += stride;\n // add the first coordinate to the output\n simplifiedFlatCoordinates[simplifiedOffset++] = x1;\n simplifiedFlatCoordinates[simplifiedOffset++] = y1;\n // find the next coordinate that does not snap to the same value as the first\n // coordinate (P2)\n let x2, y2;\n do {\n x2 = snap(flatCoordinates[offset], tolerance);\n y2 = snap(flatCoordinates[offset + 1], tolerance);\n offset += stride;\n if (offset == end) {\n // all coordinates snap to the same value, the line collapses to a point\n // push the last snapped value anyway to ensure that the output contains\n // at least two points\n // FIXME should we really return at least two points anyway?\n simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n return simplifiedOffset;\n }\n } while (x2 == x1 && y2 == y1);\n while (offset < end) {\n // snap the next coordinate (P3)\n const x3 = snap(flatCoordinates[offset], tolerance);\n const y3 = snap(flatCoordinates[offset + 1], tolerance);\n offset += stride;\n // skip P3 if it is equal to P2\n if (x3 == x2 && y3 == y2) {\n continue;\n }\n // calculate the delta between P1 and P2\n const dx1 = x2 - x1;\n const dy1 = y2 - y1;\n // calculate the delta between P3 and P1\n const dx2 = x3 - x1;\n const dy2 = y3 - y1;\n // if P1, P2, and P3 are colinear and P3 is further from P1 than P2 is from\n // P1 in the same direction then P2 is on the straight line between P1 and\n // P3\n if (\n dx1 * dy2 == dy1 * dx2 &&\n ((dx1 < 0 && dx2 < dx1) || dx1 == dx2 || (dx1 > 0 && dx2 > dx1)) &&\n ((dy1 < 0 && dy2 < dy1) || dy1 == dy2 || (dy1 > 0 && dy2 > dy1))\n ) {\n // discard P2 and set P2 = P3\n x2 = x3;\n y2 = y3;\n continue;\n }\n // either P1, P2, and P3 are not colinear, or they are colinear but P3 is\n // between P3 and P1 or on the opposite half of the line to P2. add P2,\n // and continue with P1 = P2 and P2 = P3\n simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n x1 = x2;\n y1 = y2;\n x2 = x3;\n y2 = y3;\n }\n // add the last point (P2)\n simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n return simplifiedOffset;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {number} tolerance Tolerance.\n * @param {Array} simplifiedFlatCoordinates Simplified flat\n * coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @param {Array} simplifiedEnds Simplified ends.\n * @return {number} Simplified offset.\n */\nexport function quantizeArray(\n flatCoordinates,\n offset,\n ends,\n stride,\n tolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset,\n simplifiedEnds\n) {\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n simplifiedOffset = quantize(\n flatCoordinates,\n offset,\n end,\n stride,\n tolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset\n );\n simplifiedEnds.push(simplifiedOffset);\n offset = end;\n }\n return simplifiedOffset;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} tolerance Tolerance.\n * @param {Array} simplifiedFlatCoordinates Simplified flat\n * coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @param {Array>} simplifiedEndss Simplified endss.\n * @return {number} Simplified offset.\n */\nexport function quantizeMultiArray(\n flatCoordinates,\n offset,\n endss,\n stride,\n tolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset,\n simplifiedEndss\n) {\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n const simplifiedEnds = [];\n simplifiedOffset = quantizeArray(\n flatCoordinates,\n offset,\n ends,\n stride,\n tolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset,\n simplifiedEnds\n );\n simplifiedEndss.push(simplifiedEnds);\n offset = ends[ends.length - 1];\n }\n return simplifiedOffset;\n}\n","/**\n * @module ol/geom/flat/inflate\n */\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {Array} [coordinates] Coordinates.\n * @return {Array} Coordinates.\n */\nexport function inflateCoordinates(\n flatCoordinates,\n offset,\n end,\n stride,\n coordinates\n) {\n coordinates = coordinates !== undefined ? coordinates : [];\n let i = 0;\n for (let j = offset; j < end; j += stride) {\n coordinates[i++] = flatCoordinates.slice(j, j + stride);\n }\n coordinates.length = i;\n return coordinates;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {Array>} [coordinatess] Coordinatess.\n * @return {Array>} Coordinatess.\n */\nexport function inflateCoordinatesArray(\n flatCoordinates,\n offset,\n ends,\n stride,\n coordinatess\n) {\n coordinatess = coordinatess !== undefined ? coordinatess : [];\n let i = 0;\n for (let j = 0, jj = ends.length; j < jj; ++j) {\n const end = ends[j];\n coordinatess[i++] = inflateCoordinates(\n flatCoordinates,\n offset,\n end,\n stride,\n coordinatess[i]\n );\n offset = end;\n }\n coordinatess.length = i;\n return coordinatess;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Endss.\n * @param {number} stride Stride.\n * @param {Array>>} [coordinatesss]\n * Coordinatesss.\n * @return {Array>>} Coordinatesss.\n */\nexport function inflateMultiCoordinatesArray(\n flatCoordinates,\n offset,\n endss,\n stride,\n coordinatesss\n) {\n coordinatesss = coordinatesss !== undefined ? coordinatesss : [];\n let i = 0;\n for (let j = 0, jj = endss.length; j < jj; ++j) {\n const ends = endss[j];\n coordinatesss[i++] =\n ends.length === 1 && ends[0] === offset\n ? []\n : inflateCoordinatesArray(\n flatCoordinates,\n offset,\n ends,\n stride,\n coordinatesss[i]\n );\n offset = ends[ends.length - 1];\n }\n coordinatesss.length = i;\n return coordinatesss;\n}\n","/**\n * @module ol/geom/flat/area\n */\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {number} Area.\n */\nexport function linearRing(flatCoordinates, offset, end, stride) {\n let twiceArea = 0;\n let x1 = flatCoordinates[end - stride];\n let y1 = flatCoordinates[end - stride + 1];\n for (; offset < end; offset += stride) {\n const x2 = flatCoordinates[offset];\n const y2 = flatCoordinates[offset + 1];\n twiceArea += y1 * x2 - x1 * y2;\n x1 = x2;\n y1 = y2;\n }\n return twiceArea / 2;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @return {number} Area.\n */\nexport function linearRings(flatCoordinates, offset, ends, stride) {\n let area = 0;\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n area += linearRing(flatCoordinates, offset, end, stride);\n offset = end;\n }\n return area;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Endss.\n * @param {number} stride Stride.\n * @return {number} Area.\n */\nexport function linearRingss(flatCoordinates, offset, endss, stride) {\n let area = 0;\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n area += linearRings(flatCoordinates, offset, ends, stride);\n offset = ends[ends.length - 1];\n }\n return area;\n}\n","/**\n * @module ol/geom/LinearRing\n */\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {assignClosestPoint, maxSquaredDelta} from './flat/closest.js';\nimport {closestSquaredDistanceXY} from '../extent.js';\nimport {deflateCoordinates} from './flat/deflate.js';\nimport {douglasPeucker} from './flat/simplify.js';\nimport {inflateCoordinates} from './flat/inflate.js';\nimport {linearRing as linearRingArea} from './flat/area.js';\n\n/**\n * @classdesc\n * Linear ring geometry. Only used as part of polygon; cannot be rendered\n * on its own.\n *\n * @api\n */\nclass LinearRing extends SimpleGeometry {\n /**\n * @param {Array|Array} coordinates Coordinates.\n * For internal use, flat coordinates in combination with `layout` are also accepted.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n */\n constructor(coordinates, layout) {\n super();\n\n /**\n * @private\n * @type {number}\n */\n this.maxDelta_ = -1;\n\n /**\n * @private\n * @type {number}\n */\n this.maxDeltaRevision_ = -1;\n\n if (layout !== undefined && !Array.isArray(coordinates[0])) {\n this.setFlatCoordinates(\n layout,\n /** @type {Array} */ (coordinates)\n );\n } else {\n this.setCoordinates(\n /** @type {Array} */ (\n coordinates\n ),\n layout\n );\n }\n }\n\n /**\n * Make a complete copy of the geometry.\n * @return {!LinearRing} Clone.\n * @api\n */\n clone() {\n return new LinearRing(this.flatCoordinates.slice(), this.layout);\n }\n\n /**\n * @param {number} x X.\n * @param {number} y Y.\n * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @return {number} Minimum squared distance.\n */\n closestPointXY(x, y, closestPoint, minSquaredDistance) {\n if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n return minSquaredDistance;\n }\n if (this.maxDeltaRevision_ != this.getRevision()) {\n this.maxDelta_ = Math.sqrt(\n maxSquaredDelta(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n 0\n )\n );\n this.maxDeltaRevision_ = this.getRevision();\n }\n return assignClosestPoint(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n this.maxDelta_,\n true,\n x,\n y,\n closestPoint,\n minSquaredDistance\n );\n }\n\n /**\n * Return the area of the linear ring on projected plane.\n * @return {number} Area (on projected plane).\n * @api\n */\n getArea() {\n return linearRingArea(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride\n );\n }\n\n /**\n * Return the coordinates of the linear ring.\n * @return {Array} Coordinates.\n * @api\n */\n getCoordinates() {\n return inflateCoordinates(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride\n );\n }\n\n /**\n * @param {number} squaredTolerance Squared tolerance.\n * @return {LinearRing} Simplified LinearRing.\n * @protected\n */\n getSimplifiedGeometryInternal(squaredTolerance) {\n const simplifiedFlatCoordinates = [];\n simplifiedFlatCoordinates.length = douglasPeucker(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n 0\n );\n return new LinearRing(simplifiedFlatCoordinates, 'XY');\n }\n\n /**\n * Get the type of this geometry.\n * @return {import(\"./Geometry.js\").Type} Geometry type.\n * @api\n */\n getType() {\n return 'LinearRing';\n }\n\n /**\n * Test if the geometry and the passed extent intersect.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @return {boolean} `true` if the geometry and the extent intersect.\n * @api\n */\n intersectsExtent(extent) {\n return false;\n }\n\n /**\n * Set the coordinates of the linear ring.\n * @param {!Array} coordinates Coordinates.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n * @api\n */\n setCoordinates(coordinates, layout) {\n this.setLayout(layout, coordinates, 1);\n if (!this.flatCoordinates) {\n this.flatCoordinates = [];\n }\n this.flatCoordinates.length = deflateCoordinates(\n this.flatCoordinates,\n 0,\n coordinates,\n this.stride\n );\n this.changed();\n }\n}\n\nexport default LinearRing;\n","/**\n * @module ol/geom/Point\n */\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {containsXY, createOrUpdateFromCoordinate} from '../extent.js';\nimport {deflateCoordinate} from './flat/deflate.js';\nimport {squaredDistance as squaredDx} from '../math.js';\n\n/**\n * @classdesc\n * Point geometry.\n *\n * @api\n */\nclass Point extends SimpleGeometry {\n /**\n * @param {import(\"../coordinate.js\").Coordinate} coordinates Coordinates.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n */\n constructor(coordinates, layout) {\n super();\n this.setCoordinates(coordinates, layout);\n }\n\n /**\n * Make a complete copy of the geometry.\n * @return {!Point} Clone.\n * @api\n */\n clone() {\n const point = new Point(this.flatCoordinates.slice(), this.layout);\n point.applyProperties(this);\n return point;\n }\n\n /**\n * @param {number} x X.\n * @param {number} y Y.\n * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @return {number} Minimum squared distance.\n */\n closestPointXY(x, y, closestPoint, minSquaredDistance) {\n const flatCoordinates = this.flatCoordinates;\n const squaredDistance = squaredDx(\n x,\n y,\n flatCoordinates[0],\n flatCoordinates[1]\n );\n if (squaredDistance < minSquaredDistance) {\n const stride = this.stride;\n for (let i = 0; i < stride; ++i) {\n closestPoint[i] = flatCoordinates[i];\n }\n closestPoint.length = stride;\n return squaredDistance;\n }\n return minSquaredDistance;\n }\n\n /**\n * Return the coordinate of the point.\n * @return {import(\"../coordinate.js\").Coordinate} Coordinates.\n * @api\n */\n getCoordinates() {\n return !this.flatCoordinates ? [] : this.flatCoordinates.slice();\n }\n\n /**\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @protected\n * @return {import(\"../extent.js\").Extent} extent Extent.\n */\n computeExtent(extent) {\n return createOrUpdateFromCoordinate(this.flatCoordinates, extent);\n }\n\n /**\n * Get the type of this geometry.\n * @return {import(\"./Geometry.js\").Type} Geometry type.\n * @api\n */\n getType() {\n return 'Point';\n }\n\n /**\n * Test if the geometry and the passed extent intersect.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @return {boolean} `true` if the geometry and the extent intersect.\n * @api\n */\n intersectsExtent(extent) {\n return containsXY(extent, this.flatCoordinates[0], this.flatCoordinates[1]);\n }\n\n /**\n * @param {!Array<*>} coordinates Coordinates.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n * @api\n */\n setCoordinates(coordinates, layout) {\n this.setLayout(layout, coordinates, 0);\n if (!this.flatCoordinates) {\n this.flatCoordinates = [];\n }\n this.flatCoordinates.length = deflateCoordinate(\n this.flatCoordinates,\n 0,\n coordinates,\n this.stride\n );\n this.changed();\n }\n}\n\nexport default Point;\n","/**\n * @module ol/geom/flat/contains\n */\nimport {forEachCorner} from '../../extent.js';\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} Contains extent.\n */\nexport function linearRingContainsExtent(\n flatCoordinates,\n offset,\n end,\n stride,\n extent\n) {\n const outside = forEachCorner(\n extent,\n /**\n * @param {import(\"../../coordinate.js\").Coordinate} coordinate Coordinate.\n * @return {boolean} Contains (x, y).\n */\n function (coordinate) {\n return !linearRingContainsXY(\n flatCoordinates,\n offset,\n end,\n stride,\n coordinate[0],\n coordinate[1]\n );\n }\n );\n return !outside;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {boolean} Contains (x, y).\n */\nexport function linearRingContainsXY(\n flatCoordinates,\n offset,\n end,\n stride,\n x,\n y\n) {\n // https://geomalgorithms.com/a03-_inclusion.html\n // Copyright 2000 softSurfer, 2012 Dan Sunday\n // This code may be freely used and modified for any purpose\n // providing that this copyright notice is included with it.\n // SoftSurfer makes no warranty for this code, and cannot be held\n // liable for any real or imagined damage resulting from its use.\n // Users of this code must verify correctness for their application.\n let wn = 0;\n let x1 = flatCoordinates[end - stride];\n let y1 = flatCoordinates[end - stride + 1];\n for (; offset < end; offset += stride) {\n const x2 = flatCoordinates[offset];\n const y2 = flatCoordinates[offset + 1];\n if (y1 <= y) {\n if (y2 > y && (x2 - x1) * (y - y1) - (x - x1) * (y2 - y1) > 0) {\n wn++;\n }\n } else if (y2 <= y && (x2 - x1) * (y - y1) - (x - x1) * (y2 - y1) < 0) {\n wn--;\n }\n x1 = x2;\n y1 = y2;\n }\n return wn !== 0;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {boolean} Contains (x, y).\n */\nexport function linearRingsContainsXY(\n flatCoordinates,\n offset,\n ends,\n stride,\n x,\n y\n) {\n if (ends.length === 0) {\n return false;\n }\n if (!linearRingContainsXY(flatCoordinates, offset, ends[0], stride, x, y)) {\n return false;\n }\n for (let i = 1, ii = ends.length; i < ii; ++i) {\n if (\n linearRingContainsXY(flatCoordinates, ends[i - 1], ends[i], stride, x, y)\n ) {\n return false;\n }\n }\n return true;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {boolean} Contains (x, y).\n */\nexport function linearRingssContainsXY(\n flatCoordinates,\n offset,\n endss,\n stride,\n x,\n y\n) {\n if (endss.length === 0) {\n return false;\n }\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n if (linearRingsContainsXY(flatCoordinates, offset, ends, stride, x, y)) {\n return true;\n }\n offset = ends[ends.length - 1];\n }\n return false;\n}\n","/**\n * @module ol/geom/flat/interiorpoint\n */\nimport {ascending} from '../../array.js';\nimport {linearRingsContainsXY} from './contains.js';\n\n/**\n * Calculates a point that is likely to lie in the interior of the linear rings.\n * Inspired by JTS's com.vividsolutions.jts.geom.Geometry#getInteriorPoint.\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {Array} flatCenters Flat centers.\n * @param {number} flatCentersOffset Flat center offset.\n * @param {Array} [dest] Destination.\n * @return {Array} Destination point as XYM coordinate, where M is the\n * length of the horizontal intersection that the point belongs to.\n */\nexport function getInteriorPointOfArray(\n flatCoordinates,\n offset,\n ends,\n stride,\n flatCenters,\n flatCentersOffset,\n dest\n) {\n let i, ii, x, x1, x2, y1, y2;\n const y = flatCenters[flatCentersOffset + 1];\n /** @type {Array} */\n const intersections = [];\n // Calculate intersections with the horizontal line\n for (let r = 0, rr = ends.length; r < rr; ++r) {\n const end = ends[r];\n x1 = flatCoordinates[end - stride];\n y1 = flatCoordinates[end - stride + 1];\n for (i = offset; i < end; i += stride) {\n x2 = flatCoordinates[i];\n y2 = flatCoordinates[i + 1];\n if ((y <= y1 && y2 <= y) || (y1 <= y && y <= y2)) {\n x = ((y - y1) / (y2 - y1)) * (x2 - x1) + x1;\n intersections.push(x);\n }\n x1 = x2;\n y1 = y2;\n }\n }\n // Find the longest segment of the horizontal line that has its center point\n // inside the linear ring.\n let pointX = NaN;\n let maxSegmentLength = -Infinity;\n intersections.sort(ascending);\n x1 = intersections[0];\n for (i = 1, ii = intersections.length; i < ii; ++i) {\n x2 = intersections[i];\n const segmentLength = Math.abs(x2 - x1);\n if (segmentLength > maxSegmentLength) {\n x = (x1 + x2) / 2;\n if (linearRingsContainsXY(flatCoordinates, offset, ends, stride, x, y)) {\n pointX = x;\n maxSegmentLength = segmentLength;\n }\n }\n x1 = x2;\n }\n if (isNaN(pointX)) {\n // There is no horizontal line that has its center point inside the linear\n // ring. Use the center of the the linear ring's extent.\n pointX = flatCenters[flatCentersOffset];\n }\n if (dest) {\n dest.push(pointX, y, maxSegmentLength);\n return dest;\n }\n return [pointX, y, maxSegmentLength];\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Endss.\n * @param {number} stride Stride.\n * @param {Array} flatCenters Flat centers.\n * @return {Array} Interior points as XYM coordinates, where M is the\n * length of the horizontal intersection that the point belongs to.\n */\nexport function getInteriorPointsOfMultiArray(\n flatCoordinates,\n offset,\n endss,\n stride,\n flatCenters\n) {\n let interiorPoints = [];\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n interiorPoints = getInteriorPointOfArray(\n flatCoordinates,\n offset,\n ends,\n stride,\n flatCenters,\n 2 * i,\n interiorPoints\n );\n offset = ends[ends.length - 1];\n }\n return interiorPoints;\n}\n","/**\n * @module ol/geom/flat/segments\n */\n\n/**\n * This function calls `callback` for each segment of the flat coordinates\n * array. If the callback returns a truthy value the function returns that\n * value immediately. Otherwise the function returns `false`.\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {function(import(\"../../coordinate.js\").Coordinate, import(\"../../coordinate.js\").Coordinate): T} callback Function\n * called for each segment.\n * @return {T|boolean} Value.\n * @template T\n */\nexport function forEach(flatCoordinates, offset, end, stride, callback) {\n let ret;\n offset += stride;\n for (; offset < end; offset += stride) {\n ret = callback(\n flatCoordinates.slice(offset - stride, offset),\n flatCoordinates.slice(offset, offset + stride)\n );\n if (ret) {\n return ret;\n }\n }\n return false;\n}\n","/**\n * @module ol/geom/flat/intersectsextent\n */\nimport {\n containsExtent,\n createEmpty,\n extendFlatCoordinates,\n intersects,\n intersectsSegment,\n} from '../../extent.js';\nimport {forEach as forEachSegment} from './segments.js';\nimport {linearRingContainsExtent, linearRingContainsXY} from './contains.js';\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLineString(\n flatCoordinates,\n offset,\n end,\n stride,\n extent\n) {\n const coordinatesExtent = extendFlatCoordinates(\n createEmpty(),\n flatCoordinates,\n offset,\n end,\n stride\n );\n if (!intersects(extent, coordinatesExtent)) {\n return false;\n }\n if (containsExtent(extent, coordinatesExtent)) {\n return true;\n }\n if (coordinatesExtent[0] >= extent[0] && coordinatesExtent[2] <= extent[2]) {\n return true;\n }\n if (coordinatesExtent[1] >= extent[1] && coordinatesExtent[3] <= extent[3]) {\n return true;\n }\n return forEachSegment(\n flatCoordinates,\n offset,\n end,\n stride,\n /**\n * @param {import(\"../../coordinate.js\").Coordinate} point1 Start point.\n * @param {import(\"../../coordinate.js\").Coordinate} point2 End point.\n * @return {boolean} `true` if the segment and the extent intersect,\n * `false` otherwise.\n */\n function (point1, point2) {\n return intersectsSegment(extent, point1, point2);\n }\n );\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLineStringArray(\n flatCoordinates,\n offset,\n ends,\n stride,\n extent\n) {\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n if (\n intersectsLineString(flatCoordinates, offset, ends[i], stride, extent)\n ) {\n return true;\n }\n offset = ends[i];\n }\n return false;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLinearRing(\n flatCoordinates,\n offset,\n end,\n stride,\n extent\n) {\n if (intersectsLineString(flatCoordinates, offset, end, stride, extent)) {\n return true;\n }\n if (\n linearRingContainsXY(\n flatCoordinates,\n offset,\n end,\n stride,\n extent[0],\n extent[1]\n )\n ) {\n return true;\n }\n if (\n linearRingContainsXY(\n flatCoordinates,\n offset,\n end,\n stride,\n extent[0],\n extent[3]\n )\n ) {\n return true;\n }\n if (\n linearRingContainsXY(\n flatCoordinates,\n offset,\n end,\n stride,\n extent[2],\n extent[1]\n )\n ) {\n return true;\n }\n if (\n linearRingContainsXY(\n flatCoordinates,\n offset,\n end,\n stride,\n extent[2],\n extent[3]\n )\n ) {\n return true;\n }\n return false;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLinearRingArray(\n flatCoordinates,\n offset,\n ends,\n stride,\n extent\n) {\n if (!intersectsLinearRing(flatCoordinates, offset, ends[0], stride, extent)) {\n return false;\n }\n if (ends.length === 1) {\n return true;\n }\n for (let i = 1, ii = ends.length; i < ii; ++i) {\n if (\n linearRingContainsExtent(\n flatCoordinates,\n ends[i - 1],\n ends[i],\n stride,\n extent\n )\n ) {\n if (\n !intersectsLineString(\n flatCoordinates,\n ends[i - 1],\n ends[i],\n stride,\n extent\n )\n ) {\n return false;\n }\n }\n }\n return true;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Endss.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLinearRingMultiArray(\n flatCoordinates,\n offset,\n endss,\n stride,\n extent\n) {\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n if (\n intersectsLinearRingArray(flatCoordinates, offset, ends, stride, extent)\n ) {\n return true;\n }\n offset = ends[ends.length - 1];\n }\n return false;\n}\n","/**\n * @module ol/geom/flat/reverse\n */\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n */\nexport function coordinates(flatCoordinates, offset, end, stride) {\n while (offset < end - stride) {\n for (let i = 0; i < stride; ++i) {\n const tmp = flatCoordinates[offset + i];\n flatCoordinates[offset + i] = flatCoordinates[end - stride + i];\n flatCoordinates[end - stride + i] = tmp;\n }\n offset += stride;\n end -= stride;\n }\n}\n","/**\n * @module ol/geom/flat/orient\n */\nimport {coordinates as reverseCoordinates} from './reverse.js';\n\n/**\n * Is the linear ring oriented clockwise in a coordinate system with a bottom-left\n * coordinate origin? For a coordinate system with a top-left coordinate origin,\n * the ring's orientation is clockwise when this function returns false.\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {boolean} Is clockwise.\n */\nexport function linearRingIsClockwise(flatCoordinates, offset, end, stride) {\n // https://stackoverflow.com/q/1165647/clockwise-method#1165943\n // https://github.com/OSGeo/gdal/blob/master/gdal/ogr/ogrlinearring.cpp\n let edge = 0;\n let x1 = flatCoordinates[end - stride];\n let y1 = flatCoordinates[end - stride + 1];\n for (; offset < end; offset += stride) {\n const x2 = flatCoordinates[offset];\n const y2 = flatCoordinates[offset + 1];\n edge += (x2 - x1) * (y2 + y1);\n x1 = x2;\n y1 = y2;\n }\n return edge === 0 ? undefined : edge > 0;\n}\n\n/**\n * Determines if linear rings are oriented. By default, left-hand orientation\n * is tested (first ring must be clockwise, remaining rings counter-clockwise).\n * To test for right-hand orientation, use the `right` argument.\n *\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Array of end indexes.\n * @param {number} stride Stride.\n * @param {boolean} [right] Test for right-hand orientation\n * (counter-clockwise exterior ring and clockwise interior rings).\n * @return {boolean} Rings are correctly oriented.\n */\nexport function linearRingsAreOriented(\n flatCoordinates,\n offset,\n ends,\n stride,\n right\n) {\n right = right !== undefined ? right : false;\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n const isClockwise = linearRingIsClockwise(\n flatCoordinates,\n offset,\n end,\n stride\n );\n if (i === 0) {\n if ((right && isClockwise) || (!right && !isClockwise)) {\n return false;\n }\n } else {\n if ((right && !isClockwise) || (!right && isClockwise)) {\n return false;\n }\n }\n offset = end;\n }\n return true;\n}\n\n/**\n * Determines if linear rings are oriented. By default, left-hand orientation\n * is tested (first ring must be clockwise, remaining rings counter-clockwise).\n * To test for right-hand orientation, use the `right` argument.\n *\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Array of array of end indexes.\n * @param {number} stride Stride.\n * @param {boolean} [right] Test for right-hand orientation\n * (counter-clockwise exterior ring and clockwise interior rings).\n * @return {boolean} Rings are correctly oriented.\n */\nexport function linearRingssAreOriented(\n flatCoordinates,\n offset,\n endss,\n stride,\n right\n) {\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n if (!linearRingsAreOriented(flatCoordinates, offset, ends, stride, right)) {\n return false;\n }\n if (ends.length) {\n offset = ends[ends.length - 1];\n }\n }\n return true;\n}\n\n/**\n * Orient coordinates in a flat array of linear rings. By default, rings\n * are oriented following the left-hand rule (clockwise for exterior and\n * counter-clockwise for interior rings). To orient according to the\n * right-hand rule, use the `right` argument.\n *\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {boolean} [right] Follow the right-hand rule for orientation.\n * @return {number} End.\n */\nexport function orientLinearRings(\n flatCoordinates,\n offset,\n ends,\n stride,\n right\n) {\n right = right !== undefined ? right : false;\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n const isClockwise = linearRingIsClockwise(\n flatCoordinates,\n offset,\n end,\n stride\n );\n const reverse =\n i === 0\n ? (right && isClockwise) || (!right && !isClockwise)\n : (right && !isClockwise) || (!right && isClockwise);\n if (reverse) {\n reverseCoordinates(flatCoordinates, offset, end, stride);\n }\n offset = end;\n }\n return offset;\n}\n\n/**\n * Orient coordinates in a flat array of linear rings. By default, rings\n * are oriented following the left-hand rule (clockwise for exterior and\n * counter-clockwise for interior rings). To orient according to the\n * right-hand rule, use the `right` argument.\n *\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Array of array of end indexes.\n * @param {number} stride Stride.\n * @param {boolean} [right] Follow the right-hand rule for orientation.\n * @return {number} End.\n */\nexport function orientLinearRingsArray(\n flatCoordinates,\n offset,\n endss,\n stride,\n right\n) {\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n offset = orientLinearRings(\n flatCoordinates,\n offset,\n endss[i],\n stride,\n right\n );\n }\n return offset;\n}\n\n/**\n * Return a two-dimensional endss\n * @param {Array} flatCoordinates Flat coordinates\n * @param {Array} ends Linear ring end indexes\n * @return {Array>} Two dimensional endss array that can\n * be used to contruct a MultiPolygon\n */\nexport function inflateEnds(flatCoordinates, ends) {\n const endss = [];\n let offset = 0;\n let prevEndIndex = 0;\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n // classifies an array of rings into polygons with outer rings and holes\n if (!linearRingIsClockwise(flatCoordinates, offset, end, 2)) {\n endss.push(ends.slice(prevEndIndex, i + 1));\n } else {\n if (endss.length === 0) {\n continue;\n }\n endss[endss.length - 1].push(ends[prevEndIndex]);\n }\n prevEndIndex = i + 1;\n offset = end;\n }\n return endss;\n}\n","/**\n * @module ol/geom/Polygon\n */\nimport LinearRing from './LinearRing.js';\nimport Point from './Point.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {arrayMaxSquaredDelta, assignClosestArrayPoint} from './flat/closest.js';\nimport {closestSquaredDistanceXY, getCenter} from '../extent.js';\nimport {deflateCoordinatesArray} from './flat/deflate.js';\nimport {extend} from '../array.js';\nimport {getInteriorPointOfArray} from './flat/interiorpoint.js';\nimport {inflateCoordinatesArray} from './flat/inflate.js';\nimport {intersectsLinearRingArray} from './flat/intersectsextent.js';\nimport {linearRingsAreOriented, orientLinearRings} from './flat/orient.js';\nimport {linearRings as linearRingsArea} from './flat/area.js';\nimport {linearRingsContainsXY} from './flat/contains.js';\nimport {modulo} from '../math.js';\nimport {quantizeArray} from './flat/simplify.js';\nimport {offset as sphereOffset} from '../sphere.js';\n\n/**\n * @classdesc\n * Polygon geometry.\n *\n * @api\n */\nclass Polygon extends SimpleGeometry {\n /**\n * @param {!Array>|!Array} coordinates\n * Array of linear rings that define the polygon. The first linear ring of the\n * array defines the outer-boundary or surface of the polygon. Each subsequent\n * linear ring defines a hole in the surface of the polygon. A linear ring is\n * an array of vertices' coordinates where the first coordinate and the last are\n * equivalent. (For internal use, flat coordinates in combination with\n * `layout` and `ends` are also accepted.)\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n * @param {Array} [ends] Ends (for internal use with flat coordinates).\n */\n constructor(coordinates, layout, ends) {\n super();\n\n /**\n * @type {Array}\n * @private\n */\n this.ends_ = [];\n\n /**\n * @private\n * @type {number}\n */\n this.flatInteriorPointRevision_ = -1;\n\n /**\n * @private\n * @type {import(\"../coordinate.js\").Coordinate}\n */\n this.flatInteriorPoint_ = null;\n\n /**\n * @private\n * @type {number}\n */\n this.maxDelta_ = -1;\n\n /**\n * @private\n * @type {number}\n */\n this.maxDeltaRevision_ = -1;\n\n /**\n * @private\n * @type {number}\n */\n this.orientedRevision_ = -1;\n\n /**\n * @private\n * @type {Array}\n */\n this.orientedFlatCoordinates_ = null;\n\n if (layout !== undefined && ends) {\n this.setFlatCoordinates(\n layout,\n /** @type {Array} */ (coordinates)\n );\n this.ends_ = ends;\n } else {\n this.setCoordinates(\n /** @type {Array>} */ (\n coordinates\n ),\n layout\n );\n }\n }\n\n /**\n * Append the passed linear ring to this polygon.\n * @param {LinearRing} linearRing Linear ring.\n * @api\n */\n appendLinearRing(linearRing) {\n if (!this.flatCoordinates) {\n this.flatCoordinates = linearRing.getFlatCoordinates().slice();\n } else {\n extend(this.flatCoordinates, linearRing.getFlatCoordinates());\n }\n this.ends_.push(this.flatCoordinates.length);\n this.changed();\n }\n\n /**\n * Make a complete copy of the geometry.\n * @return {!Polygon} Clone.\n * @api\n */\n clone() {\n const polygon = new Polygon(\n this.flatCoordinates.slice(),\n this.layout,\n this.ends_.slice()\n );\n polygon.applyProperties(this);\n return polygon;\n }\n\n /**\n * @param {number} x X.\n * @param {number} y Y.\n * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @return {number} Minimum squared distance.\n */\n closestPointXY(x, y, closestPoint, minSquaredDistance) {\n if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n return minSquaredDistance;\n }\n if (this.maxDeltaRevision_ != this.getRevision()) {\n this.maxDelta_ = Math.sqrt(\n arrayMaxSquaredDelta(\n this.flatCoordinates,\n 0,\n this.ends_,\n this.stride,\n 0\n )\n );\n this.maxDeltaRevision_ = this.getRevision();\n }\n return assignClosestArrayPoint(\n this.flatCoordinates,\n 0,\n this.ends_,\n this.stride,\n this.maxDelta_,\n true,\n x,\n y,\n closestPoint,\n minSquaredDistance\n );\n }\n\n /**\n * @param {number} x X.\n * @param {number} y Y.\n * @return {boolean} Contains (x, y).\n */\n containsXY(x, y) {\n return linearRingsContainsXY(\n this.getOrientedFlatCoordinates(),\n 0,\n this.ends_,\n this.stride,\n x,\n y\n );\n }\n\n /**\n * Return the area of the polygon on projected plane.\n * @return {number} Area (on projected plane).\n * @api\n */\n getArea() {\n return linearRingsArea(\n this.getOrientedFlatCoordinates(),\n 0,\n this.ends_,\n this.stride\n );\n }\n\n /**\n * Get the coordinate array for this geometry. This array has the structure\n * of a GeoJSON coordinate array for polygons.\n *\n * @param {boolean} [right] Orient coordinates according to the right-hand\n * rule (counter-clockwise for exterior and clockwise for interior rings).\n * If `false`, coordinates will be oriented according to the left-hand rule\n * (clockwise for exterior and counter-clockwise for interior rings).\n * By default, coordinate orientation will depend on how the geometry was\n * constructed.\n * @return {Array>} Coordinates.\n * @api\n */\n getCoordinates(right) {\n let flatCoordinates;\n if (right !== undefined) {\n flatCoordinates = this.getOrientedFlatCoordinates().slice();\n orientLinearRings(flatCoordinates, 0, this.ends_, this.stride, right);\n } else {\n flatCoordinates = this.flatCoordinates;\n }\n\n return inflateCoordinatesArray(flatCoordinates, 0, this.ends_, this.stride);\n }\n\n /**\n * @return {Array} Ends.\n */\n getEnds() {\n return this.ends_;\n }\n\n /**\n * @return {Array} Interior point.\n */\n getFlatInteriorPoint() {\n if (this.flatInteriorPointRevision_ != this.getRevision()) {\n const flatCenter = getCenter(this.getExtent());\n this.flatInteriorPoint_ = getInteriorPointOfArray(\n this.getOrientedFlatCoordinates(),\n 0,\n this.ends_,\n this.stride,\n flatCenter,\n 0\n );\n this.flatInteriorPointRevision_ = this.getRevision();\n }\n return this.flatInteriorPoint_;\n }\n\n /**\n * Return an interior point of the polygon.\n * @return {Point} Interior point as XYM coordinate, where M is the\n * length of the horizontal intersection that the point belongs to.\n * @api\n */\n getInteriorPoint() {\n return new Point(this.getFlatInteriorPoint(), 'XYM');\n }\n\n /**\n * Return the number of rings of the polygon, this includes the exterior\n * ring and any interior rings.\n *\n * @return {number} Number of rings.\n * @api\n */\n getLinearRingCount() {\n return this.ends_.length;\n }\n\n /**\n * Return the Nth linear ring of the polygon geometry. Return `null` if the\n * given index is out of range.\n * The exterior linear ring is available at index `0` and the interior rings\n * at index `1` and beyond.\n *\n * @param {number} index Index.\n * @return {LinearRing|null} Linear ring.\n * @api\n */\n getLinearRing(index) {\n if (index < 0 || this.ends_.length <= index) {\n return null;\n }\n return new LinearRing(\n this.flatCoordinates.slice(\n index === 0 ? 0 : this.ends_[index - 1],\n this.ends_[index]\n ),\n this.layout\n );\n }\n\n /**\n * Return the linear rings of the polygon.\n * @return {Array} Linear rings.\n * @api\n */\n getLinearRings() {\n const layout = this.layout;\n const flatCoordinates = this.flatCoordinates;\n const ends = this.ends_;\n const linearRings = [];\n let offset = 0;\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n const linearRing = new LinearRing(\n flatCoordinates.slice(offset, end),\n layout\n );\n linearRings.push(linearRing);\n offset = end;\n }\n return linearRings;\n }\n\n /**\n * @return {Array} Oriented flat coordinates.\n */\n getOrientedFlatCoordinates() {\n if (this.orientedRevision_ != this.getRevision()) {\n const flatCoordinates = this.flatCoordinates;\n if (linearRingsAreOriented(flatCoordinates, 0, this.ends_, this.stride)) {\n this.orientedFlatCoordinates_ = flatCoordinates;\n } else {\n this.orientedFlatCoordinates_ = flatCoordinates.slice();\n this.orientedFlatCoordinates_.length = orientLinearRings(\n this.orientedFlatCoordinates_,\n 0,\n this.ends_,\n this.stride\n );\n }\n this.orientedRevision_ = this.getRevision();\n }\n return this.orientedFlatCoordinates_;\n }\n\n /**\n * @param {number} squaredTolerance Squared tolerance.\n * @return {Polygon} Simplified Polygon.\n * @protected\n */\n getSimplifiedGeometryInternal(squaredTolerance) {\n const simplifiedFlatCoordinates = [];\n const simplifiedEnds = [];\n simplifiedFlatCoordinates.length = quantizeArray(\n this.flatCoordinates,\n 0,\n this.ends_,\n this.stride,\n Math.sqrt(squaredTolerance),\n simplifiedFlatCoordinates,\n 0,\n simplifiedEnds\n );\n return new Polygon(simplifiedFlatCoordinates, 'XY', simplifiedEnds);\n }\n\n /**\n * Get the type of this geometry.\n * @return {import(\"./Geometry.js\").Type} Geometry type.\n * @api\n */\n getType() {\n return 'Polygon';\n }\n\n /**\n * Test if the geometry and the passed extent intersect.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @return {boolean} `true` if the geometry and the extent intersect.\n * @api\n */\n intersectsExtent(extent) {\n return intersectsLinearRingArray(\n this.getOrientedFlatCoordinates(),\n 0,\n this.ends_,\n this.stride,\n extent\n );\n }\n\n /**\n * Set the coordinates of the polygon.\n * @param {!Array>} coordinates Coordinates.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n * @api\n */\n setCoordinates(coordinates, layout) {\n this.setLayout(layout, coordinates, 2);\n if (!this.flatCoordinates) {\n this.flatCoordinates = [];\n }\n const ends = deflateCoordinatesArray(\n this.flatCoordinates,\n 0,\n coordinates,\n this.stride,\n this.ends_\n );\n this.flatCoordinates.length = ends.length === 0 ? 0 : ends[ends.length - 1];\n this.changed();\n }\n}\n\nexport default Polygon;\n\n/**\n * Create an approximation of a circle on the surface of a sphere.\n * @param {import(\"../coordinate.js\").Coordinate} center Center (`[lon, lat]` in degrees).\n * @param {number} radius The great-circle distance from the center to\n * the polygon vertices in meters.\n * @param {number} [n] Optional number of vertices for the resulting\n * polygon. Default is `32`.\n * @param {number} [sphereRadius] Optional radius for the sphere (defaults to\n * the Earth's mean radius using the WGS84 ellipsoid).\n * @return {Polygon} The \"circular\" polygon.\n * @api\n */\nexport function circular(center, radius, n, sphereRadius) {\n n = n ? n : 32;\n /** @type {Array} */\n const flatCoordinates = [];\n for (let i = 0; i < n; ++i) {\n extend(\n flatCoordinates,\n sphereOffset(center, radius, (2 * Math.PI * i) / n, sphereRadius)\n );\n }\n flatCoordinates.push(flatCoordinates[0], flatCoordinates[1]);\n return new Polygon(flatCoordinates, 'XY', [flatCoordinates.length]);\n}\n\n/**\n * Create a polygon from an extent. The layout used is `XY`.\n * @param {import(\"../extent.js\").Extent} extent The extent.\n * @return {Polygon} The polygon.\n * @api\n */\nexport function fromExtent(extent) {\n const minX = extent[0];\n const minY = extent[1];\n const maxX = extent[2];\n const maxY = extent[3];\n const flatCoordinates = [\n minX,\n minY,\n minX,\n maxY,\n maxX,\n maxY,\n maxX,\n minY,\n minX,\n minY,\n ];\n return new Polygon(flatCoordinates, 'XY', [flatCoordinates.length]);\n}\n\n/**\n * Create a regular polygon from a circle.\n * @param {import(\"./Circle.js\").default} circle Circle geometry.\n * @param {number} [sides] Number of sides of the polygon. Default is 32.\n * @param {number} [angle] Start angle for the first vertex of the polygon in\n * counter-clockwise radians. 0 means East. Default is 0.\n * @return {Polygon} Polygon geometry.\n * @api\n */\nexport function fromCircle(circle, sides, angle) {\n sides = sides ? sides : 32;\n const stride = circle.getStride();\n const layout = circle.getLayout();\n const center = circle.getCenter();\n const arrayLength = stride * (sides + 1);\n const flatCoordinates = new Array(arrayLength);\n for (let i = 0; i < arrayLength; i += stride) {\n flatCoordinates[i] = 0;\n flatCoordinates[i + 1] = 0;\n for (let j = 2; j < stride; j++) {\n flatCoordinates[i + j] = center[j];\n }\n }\n const ends = [flatCoordinates.length];\n const polygon = new Polygon(flatCoordinates, layout, ends);\n makeRegular(polygon, center, circle.getRadius(), angle);\n return polygon;\n}\n\n/**\n * Modify the coordinates of a polygon to make it a regular polygon.\n * @param {Polygon} polygon Polygon geometry.\n * @param {import(\"../coordinate.js\").Coordinate} center Center of the regular polygon.\n * @param {number} radius Radius of the regular polygon.\n * @param {number} [angle] Start angle for the first vertex of the polygon in\n * counter-clockwise radians. 0 means East. Default is 0.\n */\nexport function makeRegular(polygon, center, radius, angle) {\n const flatCoordinates = polygon.getFlatCoordinates();\n const stride = polygon.getStride();\n const sides = flatCoordinates.length / stride - 1;\n const startAngle = angle ? angle : 0;\n for (let i = 0; i <= sides; ++i) {\n const offset = i * stride;\n const angle = startAngle + (modulo(i, sides) * 2 * Math.PI) / sides;\n flatCoordinates[offset] = center[0] + radius * Math.cos(angle);\n flatCoordinates[offset + 1] = center[1] + radius * Math.sin(angle);\n }\n polygon.changed();\n}\n","/**\n * @module ol/Geolocation\n */\nimport BaseEvent from './events/Event.js';\nimport BaseObject from './Object.js';\nimport {circular as circularPolygon} from './geom/Polygon.js';\nimport {\n get as getProjection,\n getTransformFromProjections,\n identityTransform,\n} from './proj.js';\nimport {toRadians} from './math.js';\n\n/**\n * @enum {string}\n */\nconst Property = {\n ACCURACY: 'accuracy',\n ACCURACY_GEOMETRY: 'accuracyGeometry',\n ALTITUDE: 'altitude',\n ALTITUDE_ACCURACY: 'altitudeAccuracy',\n HEADING: 'heading',\n POSITION: 'position',\n PROJECTION: 'projection',\n SPEED: 'speed',\n TRACKING: 'tracking',\n TRACKING_OPTIONS: 'trackingOptions',\n};\n\n/**\n * @enum string\n */\nconst GeolocationErrorType = {\n /**\n * Triggered when a `GeolocationPositionError` occurs.\n * @event module:ol/Geolocation.GeolocationError#error\n * @api\n */\n ERROR: 'error',\n};\n\n/**\n * @classdesc\n * Events emitted on [GeolocationPositionError](https://developer.mozilla.org/en-US/docs/Web/API/GeolocationPositionError).\n */\nexport class GeolocationError extends BaseEvent {\n /**\n * @param {GeolocationPositionError} error error object.\n */\n constructor(error) {\n super(GeolocationErrorType.ERROR);\n\n /**\n * Code of the underlying `GeolocationPositionError`.\n * @type {number}\n * @api\n */\n this.code = error.code;\n\n /**\n * Message of the underlying `GeolocationPositionError`.\n * @type {string}\n * @api\n */\n this.message = error.message;\n }\n}\n\n/**\n * @typedef {Object} Options\n * @property {boolean} [tracking=false] Start Tracking right after\n * instantiation.\n * @property {PositionOptions} [trackingOptions] Tracking options.\n * See https://www.w3.org/TR/geolocation-API/#position_options_interface.\n * @property {import(\"./proj.js\").ProjectionLike} [projection] The projection the position\n * is reported in.\n */\n\n/**\n * @typedef {import(\"./ObjectEventType\").Types|'change:accuracy'|'change:accuracyGeometry'|'change:altitude'|\n * 'change:altitudeAccuracy'|'change:heading'|'change:position'|'change:projection'|'change:speed'|'change:tracking'|\n * 'change:trackingOptions'} GeolocationObjectEventTypes\n */\n\n/***\n * @template Return\n * @typedef {import(\"./Observable\").OnSignature<'change', import(\"./events/Event.js\").default, Return> &\n * import(\"./Observable\").OnSignature &\n * import(\"./Observable\").OnSignature<'error', GeolocationError, Return> &\n * import(\"./Observable\").CombinedOnSignature} GeolocationOnSignature\n */\n\n/**\n * @classdesc\n * Helper class for providing HTML5 Geolocation capabilities.\n * The [Geolocation API](https://www.w3.org/TR/geolocation-API/)\n * is used to locate a user's position.\n *\n * To get notified of position changes and errors, register listeners for the generic\n * `change` event and the `error` event on your instance of {@link module:ol/Geolocation~Geolocation}.\n *\n * Example:\n *\n * const geolocation = new Geolocation({\n * // take the projection to use from the map's view\n * projection: view.getProjection()\n * });\n * // listen to changes in position\n * geolocation.on('change', function(evt) {\n * console.log(geolocation.getPosition());\n * });\n * // listen to error\n * geolocation.on('error', function(evt) {\n * window.console.log(evt.message);\n * });\n *\n * @fires GeolocationError\n * @api\n */\nclass Geolocation extends BaseObject {\n /**\n * @param {Options} [options] Options.\n */\n constructor(options) {\n super();\n\n /***\n * @type {GeolocationOnSignature}\n */\n this.on;\n\n /***\n * @type {GeolocationOnSignature}\n */\n this.once;\n\n /***\n * @type {GeolocationOnSignature}\n */\n this.un;\n\n options = options || {};\n\n /**\n * The unprojected (EPSG:4326) device position.\n * @private\n * @type {?import(\"./coordinate.js\").Coordinate}\n */\n this.position_ = null;\n\n /**\n * @private\n * @type {import(\"./proj.js\").TransformFunction}\n */\n this.transform_ = identityTransform;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.watchId_ = undefined;\n\n this.addChangeListener(Property.PROJECTION, this.handleProjectionChanged_);\n this.addChangeListener(Property.TRACKING, this.handleTrackingChanged_);\n\n if (options.projection !== undefined) {\n this.setProjection(options.projection);\n }\n if (options.trackingOptions !== undefined) {\n this.setTrackingOptions(options.trackingOptions);\n }\n\n this.setTracking(options.tracking !== undefined ? options.tracking : false);\n }\n\n /**\n * Clean up.\n */\n disposeInternal() {\n this.setTracking(false);\n super.disposeInternal();\n }\n\n /**\n * @private\n */\n handleProjectionChanged_() {\n const projection = this.getProjection();\n if (projection) {\n this.transform_ = getTransformFromProjections(\n getProjection('EPSG:4326'),\n projection\n );\n if (this.position_) {\n this.set(Property.POSITION, this.transform_(this.position_));\n }\n }\n }\n\n /**\n * @private\n */\n handleTrackingChanged_() {\n if ('geolocation' in navigator) {\n const tracking = this.getTracking();\n if (tracking && this.watchId_ === undefined) {\n this.watchId_ = navigator.geolocation.watchPosition(\n this.positionChange_.bind(this),\n this.positionError_.bind(this),\n this.getTrackingOptions()\n );\n } else if (!tracking && this.watchId_ !== undefined) {\n navigator.geolocation.clearWatch(this.watchId_);\n this.watchId_ = undefined;\n }\n }\n }\n\n /**\n * @private\n * @param {GeolocationPosition} position position event.\n */\n positionChange_(position) {\n const coords = position.coords;\n this.set(Property.ACCURACY, coords.accuracy);\n this.set(\n Property.ALTITUDE,\n coords.altitude === null ? undefined : coords.altitude\n );\n this.set(\n Property.ALTITUDE_ACCURACY,\n coords.altitudeAccuracy === null ? undefined : coords.altitudeAccuracy\n );\n this.set(\n Property.HEADING,\n coords.heading === null ? undefined : toRadians(coords.heading)\n );\n if (!this.position_) {\n this.position_ = [coords.longitude, coords.latitude];\n } else {\n this.position_[0] = coords.longitude;\n this.position_[1] = coords.latitude;\n }\n const projectedPosition = this.transform_(this.position_);\n this.set(Property.POSITION, projectedPosition.slice());\n this.set(Property.SPEED, coords.speed === null ? undefined : coords.speed);\n const geometry = circularPolygon(this.position_, coords.accuracy);\n geometry.applyTransform(this.transform_);\n this.set(Property.ACCURACY_GEOMETRY, geometry);\n this.changed();\n }\n\n /**\n * @private\n * @param {GeolocationPositionError} error error object.\n */\n positionError_(error) {\n this.dispatchEvent(new GeolocationError(error));\n }\n\n /**\n * Get the accuracy of the position in meters.\n * @return {number|undefined} The accuracy of the position measurement in\n * meters.\n * @observable\n * @api\n */\n getAccuracy() {\n return /** @type {number|undefined} */ (this.get(Property.ACCURACY));\n }\n\n /**\n * Get a geometry of the position accuracy.\n * @return {?import(\"./geom/Polygon.js\").default} A geometry of the position accuracy.\n * @observable\n * @api\n */\n getAccuracyGeometry() {\n return /** @type {?import(\"./geom/Polygon.js\").default} */ (\n this.get(Property.ACCURACY_GEOMETRY) || null\n );\n }\n\n /**\n * Get the altitude associated with the position.\n * @return {number|undefined} The altitude of the position in meters above mean\n * sea level.\n * @observable\n * @api\n */\n getAltitude() {\n return /** @type {number|undefined} */ (this.get(Property.ALTITUDE));\n }\n\n /**\n * Get the altitude accuracy of the position.\n * @return {number|undefined} The accuracy of the altitude measurement in\n * meters.\n * @observable\n * @api\n */\n getAltitudeAccuracy() {\n return /** @type {number|undefined} */ (\n this.get(Property.ALTITUDE_ACCURACY)\n );\n }\n\n /**\n * Get the heading as radians clockwise from North.\n * Note: depending on the browser, the heading is only defined if the `enableHighAccuracy`\n * is set to `true` in the tracking options.\n * @return {number|undefined} The heading of the device in radians from north.\n * @observable\n * @api\n */\n getHeading() {\n return /** @type {number|undefined} */ (this.get(Property.HEADING));\n }\n\n /**\n * Get the position of the device.\n * @return {import(\"./coordinate.js\").Coordinate|undefined} The current position of the device reported\n * in the current projection.\n * @observable\n * @api\n */\n getPosition() {\n return /** @type {import(\"./coordinate.js\").Coordinate|undefined} */ (\n this.get(Property.POSITION)\n );\n }\n\n /**\n * Get the projection associated with the position.\n * @return {import(\"./proj/Projection.js\").default|undefined} The projection the position is\n * reported in.\n * @observable\n * @api\n */\n getProjection() {\n return /** @type {import(\"./proj/Projection.js\").default|undefined} */ (\n this.get(Property.PROJECTION)\n );\n }\n\n /**\n * Get the speed in meters per second.\n * @return {number|undefined} The instantaneous speed of the device in meters\n * per second.\n * @observable\n * @api\n */\n getSpeed() {\n return /** @type {number|undefined} */ (this.get(Property.SPEED));\n }\n\n /**\n * Determine if the device location is being tracked.\n * @return {boolean} The device location is being tracked.\n * @observable\n * @api\n */\n getTracking() {\n return /** @type {boolean} */ (this.get(Property.TRACKING));\n }\n\n /**\n * Get the tracking options.\n * See https://www.w3.org/TR/geolocation-API/#position-options.\n * @return {PositionOptions|undefined} PositionOptions as defined by\n * the [HTML5 Geolocation spec\n * ](https://www.w3.org/TR/geolocation-API/#position_options_interface).\n * @observable\n * @api\n */\n getTrackingOptions() {\n return /** @type {PositionOptions|undefined} */ (\n this.get(Property.TRACKING_OPTIONS)\n );\n }\n\n /**\n * Set the projection to use for transforming the coordinates.\n * @param {import(\"./proj.js\").ProjectionLike} projection The projection the position is\n * reported in.\n * @observable\n * @api\n */\n setProjection(projection) {\n this.set(Property.PROJECTION, getProjection(projection));\n }\n\n /**\n * Enable or disable tracking.\n * @param {boolean} tracking Enable tracking.\n * @observable\n * @api\n */\n setTracking(tracking) {\n this.set(Property.TRACKING, tracking);\n }\n\n /**\n * Set the tracking options.\n * See http://www.w3.org/TR/geolocation-API/#position-options.\n * @param {PositionOptions} options PositionOptions as defined by the\n * [HTML5 Geolocation spec\n * ](http://www.w3.org/TR/geolocation-API/#position_options_interface).\n * @observable\n * @api\n */\n setTrackingOptions(options) {\n this.set(Property.TRACKING_OPTIONS, options);\n }\n}\n\nexport default Geolocation;\n","/**\n * @module ol/ImageBase\n */\nimport EventTarget from './events/Target.js';\nimport EventType from './events/EventType.js';\nimport {abstract} from './util.js';\n\n/**\n * @abstract\n */\nclass ImageBase extends EventTarget {\n /**\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number|undefined} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"./ImageState.js\").default} state State.\n */\n constructor(extent, resolution, pixelRatio, state) {\n super();\n\n /**\n * @protected\n * @type {import(\"./extent.js\").Extent}\n */\n this.extent = extent;\n\n /**\n * @private\n * @type {number}\n */\n this.pixelRatio_ = pixelRatio;\n\n /**\n * @protected\n * @type {number|undefined}\n */\n this.resolution = resolution;\n\n /**\n * @protected\n * @type {import(\"./ImageState.js\").default}\n */\n this.state = state;\n }\n\n /**\n * @protected\n */\n changed() {\n this.dispatchEvent(EventType.CHANGE);\n }\n\n /**\n * @return {import(\"./extent.js\").Extent} Extent.\n */\n getExtent() {\n return this.extent;\n }\n\n /**\n * @abstract\n * @return {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} Image.\n */\n getImage() {\n return abstract();\n }\n\n /**\n * @return {number} PixelRatio.\n */\n getPixelRatio() {\n return this.pixelRatio_;\n }\n\n /**\n * @return {number} Resolution.\n */\n getResolution() {\n return /** @type {number} */ (this.resolution);\n }\n\n /**\n * @return {import(\"./ImageState.js\").default} State.\n */\n getState() {\n return this.state;\n }\n\n /**\n * Load not yet loaded URI.\n * @abstract\n */\n load() {\n abstract();\n }\n}\n\nexport default ImageBase;\n","/**\n * @module ol/ImageState\n */\n\n/**\n * @enum {number}\n */\nexport default {\n IDLE: 0,\n LOADING: 1,\n LOADED: 2,\n ERROR: 3,\n EMPTY: 4,\n};\n","/**\n * @module ol/Image\n */\nimport EventType from './events/EventType.js';\nimport ImageBase from './ImageBase.js';\nimport ImageState from './ImageState.js';\nimport {IMAGE_DECODE} from './has.js';\nimport {getHeight} from './extent.js';\nimport {listenOnce, unlistenByKey} from './events.js';\n\n/**\n * A function that takes an {@link module:ol/Image~ImageWrapper} for the image and a\n * `{string}` for the src as arguments. It is supposed to make it so the\n * underlying image {@link module:ol/Image~ImageWrapper#getImage} is assigned the\n * content specified by the src. If not specified, the default is\n *\n * function(image, src) {\n * image.getImage().src = src;\n * }\n *\n * Providing a custom `imageLoadFunction` can be useful to load images with\n * post requests or - in general - through XHR requests, where the src of the\n * image element would be set to a data URI when the content is loaded.\n *\n * @typedef {function(ImageWrapper, string): void} LoadFunction\n * @api\n */\n\nclass ImageWrapper extends ImageBase {\n /**\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number|undefined} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @param {string} src Image source URI.\n * @param {?string} crossOrigin Cross origin.\n * @param {LoadFunction} imageLoadFunction Image load function.\n */\n constructor(\n extent,\n resolution,\n pixelRatio,\n src,\n crossOrigin,\n imageLoadFunction\n ) {\n super(extent, resolution, pixelRatio, ImageState.IDLE);\n\n /**\n * @private\n * @type {string}\n */\n this.src_ = src;\n\n /**\n * @private\n * @type {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement}\n */\n this.image_ = new Image();\n if (crossOrigin !== null) {\n this.image_.crossOrigin = crossOrigin;\n }\n\n /**\n * @private\n * @type {?function():void}\n */\n this.unlisten_ = null;\n\n /**\n * @protected\n * @type {import(\"./ImageState.js\").default}\n */\n this.state = ImageState.IDLE;\n\n /**\n * @private\n * @type {LoadFunction}\n */\n this.imageLoadFunction_ = imageLoadFunction;\n }\n\n /**\n * @return {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} Image.\n * @api\n */\n getImage() {\n return this.image_;\n }\n\n /**\n * Tracks loading or read errors.\n *\n * @private\n */\n handleImageError_() {\n this.state = ImageState.ERROR;\n this.unlistenImage_();\n this.changed();\n }\n\n /**\n * Tracks successful image load.\n *\n * @private\n */\n handleImageLoad_() {\n if (this.resolution === undefined) {\n this.resolution = getHeight(this.extent) / this.image_.height;\n }\n this.state = ImageState.LOADED;\n this.unlistenImage_();\n this.changed();\n }\n\n /**\n * Load the image or retry if loading previously failed.\n * Loading is taken care of by the tile queue, and calling this method is\n * only needed for preloading or for reloading in case of an error.\n * @api\n */\n load() {\n if (this.state == ImageState.IDLE || this.state == ImageState.ERROR) {\n this.state = ImageState.LOADING;\n this.changed();\n this.imageLoadFunction_(this, this.src_);\n this.unlisten_ = listenImage(\n this.image_,\n this.handleImageLoad_.bind(this),\n this.handleImageError_.bind(this)\n );\n }\n }\n\n /**\n * @param {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} image Image.\n */\n setImage(image) {\n this.image_ = image;\n this.resolution = getHeight(this.extent) / this.image_.height;\n }\n\n /**\n * Discards event handlers which listen for load completion or errors.\n *\n * @private\n */\n unlistenImage_() {\n if (this.unlisten_) {\n this.unlisten_();\n this.unlisten_ = null;\n }\n }\n}\n\n/**\n * @param {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} image Image element.\n * @param {function():any} loadHandler Load callback function.\n * @param {function():any} errorHandler Error callback function.\n * @return {function():void} Callback to stop listening.\n */\nexport function listenImage(image, loadHandler, errorHandler) {\n const img = /** @type {HTMLImageElement} */ (image);\n let listening = true;\n let decoding = false;\n let loaded = false;\n\n const listenerKeys = [\n listenOnce(img, EventType.LOAD, function () {\n loaded = true;\n if (!decoding) {\n loadHandler();\n }\n }),\n ];\n\n if (img.src && IMAGE_DECODE) {\n decoding = true;\n img\n .decode()\n .then(function () {\n if (listening) {\n loadHandler();\n }\n })\n .catch(function (error) {\n if (listening) {\n if (loaded) {\n loadHandler();\n } else {\n errorHandler();\n }\n }\n });\n } else {\n listenerKeys.push(listenOnce(img, EventType.ERROR, errorHandler));\n }\n\n return function unlisten() {\n listening = false;\n listenerKeys.forEach(unlistenByKey);\n };\n}\n\nexport default ImageWrapper;\n","/**\n * @module ol/ImageCanvas\n */\nimport ImageBase from './ImageBase.js';\nimport ImageState from './ImageState.js';\n\n/**\n * A function that is called to trigger asynchronous canvas drawing. It is\n * called with a \"done\" callback that should be called when drawing is done.\n * If any error occurs during drawing, the \"done\" callback should be called with\n * that error.\n *\n * @typedef {function(function(Error=): void): void} Loader\n */\n\nclass ImageCanvas extends ImageBase {\n /**\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @param {HTMLCanvasElement} canvas Canvas.\n * @param {Loader} [loader] Optional loader function to\n * support asynchronous canvas drawing.\n */\n constructor(extent, resolution, pixelRatio, canvas, loader) {\n const state = loader !== undefined ? ImageState.IDLE : ImageState.LOADED;\n\n super(extent, resolution, pixelRatio, state);\n\n /**\n * Optional canvas loader function.\n * @type {?Loader}\n * @private\n */\n this.loader_ = loader !== undefined ? loader : null;\n\n /**\n * @private\n * @type {HTMLCanvasElement}\n */\n this.canvas_ = canvas;\n\n /**\n * @private\n * @type {?Error}\n */\n this.error_ = null;\n }\n\n /**\n * Get any error associated with asynchronous rendering.\n * @return {?Error} Any error that occurred during rendering.\n */\n getError() {\n return this.error_;\n }\n\n /**\n * Handle async drawing complete.\n * @param {Error} [err] Any error during drawing.\n * @private\n */\n handleLoad_(err) {\n if (err) {\n this.error_ = err;\n this.state = ImageState.ERROR;\n } else {\n this.state = ImageState.LOADED;\n }\n this.changed();\n }\n\n /**\n * Load not yet loaded URI.\n */\n load() {\n if (this.state == ImageState.IDLE) {\n this.state = ImageState.LOADING;\n this.changed();\n this.loader_(this.handleLoad_.bind(this));\n }\n }\n\n /**\n * @return {HTMLCanvasElement} Canvas element.\n */\n getImage() {\n return this.canvas_;\n }\n}\n\nexport default ImageCanvas;\n","/**\n * @module ol/ImageTile\n */\nimport Tile from './Tile.js';\nimport TileState from './TileState.js';\nimport {createCanvasContext2D} from './dom.js';\nimport {listenImage} from './Image.js';\n\nclass ImageTile extends Tile {\n /**\n * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {import(\"./TileState.js\").default} state State.\n * @param {string} src Image source URI.\n * @param {?string} crossOrigin Cross origin.\n * @param {import(\"./Tile.js\").LoadFunction} tileLoadFunction Tile load function.\n * @param {import(\"./Tile.js\").Options} [options] Tile options.\n */\n constructor(tileCoord, state, src, crossOrigin, tileLoadFunction, options) {\n super(tileCoord, state, options);\n\n /**\n * @private\n * @type {?string}\n */\n this.crossOrigin_ = crossOrigin;\n\n /**\n * Image URI\n *\n * @private\n * @type {string}\n */\n this.src_ = src;\n\n this.key = src;\n\n /**\n * @private\n * @type {HTMLImageElement|HTMLCanvasElement}\n */\n this.image_ = new Image();\n if (crossOrigin !== null) {\n this.image_.crossOrigin = crossOrigin;\n }\n\n /**\n * @private\n * @type {?function():void}\n */\n this.unlisten_ = null;\n\n /**\n * @private\n * @type {import(\"./Tile.js\").LoadFunction}\n */\n this.tileLoadFunction_ = tileLoadFunction;\n }\n\n /**\n * Get the HTML image element for this tile (may be a Canvas, Image, or Video).\n * @return {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} Image.\n * @api\n */\n getImage() {\n return this.image_;\n }\n\n /**\n * Sets an HTML image element for this tile (may be a Canvas or preloaded Image).\n * @param {HTMLCanvasElement|HTMLImageElement} element Element.\n */\n setImage(element) {\n this.image_ = element;\n this.state = TileState.LOADED;\n this.unlistenImage_();\n this.changed();\n }\n\n /**\n * Tracks loading or read errors.\n *\n * @private\n */\n handleImageError_() {\n this.state = TileState.ERROR;\n this.unlistenImage_();\n this.image_ = getBlankImage();\n this.changed();\n }\n\n /**\n * Tracks successful image load.\n *\n * @private\n */\n handleImageLoad_() {\n const image = /** @type {HTMLImageElement} */ (this.image_);\n if (image.naturalWidth && image.naturalHeight) {\n this.state = TileState.LOADED;\n } else {\n this.state = TileState.EMPTY;\n }\n this.unlistenImage_();\n this.changed();\n }\n\n /**\n * Load the image or retry if loading previously failed.\n * Loading is taken care of by the tile queue, and calling this method is\n * only needed for preloading or for reloading in case of an error.\n *\n * To retry loading tiles on failed requests, use a custom `tileLoadFunction`\n * that checks for error status codes and reloads only when the status code is\n * 408, 429, 500, 502, 503 and 504, and only when not too many retries have been\n * made already:\n *\n * ```js\n * const retryCodes = [408, 429, 500, 502, 503, 504];\n * const retries = {};\n * source.setTileLoadFunction((tile, src) => {\n * const image = tile.getImage();\n * fetch(src)\n * .then((response) => {\n * if (retryCodes.includes(response.status)) {\n * retries[src] = (retries[src] || 0) + 1;\n * if (retries[src] <= 3) {\n * setTimeout(() => tile.load(), retries[src] * 1000);\n * }\n * return Promise.reject();\n * }\n * return response.blob();\n * })\n * .then((blob) => {\n * const imageUrl = URL.createObjectURL(blob);\n * image.src = imageUrl;\n * setTimeout(() => URL.revokeObjectURL(imageUrl), 5000);\n * })\n * .catch(() => tile.setState(3)); // error\n * });\n * ```\n *\n * @api\n */\n load() {\n if (this.state == TileState.ERROR) {\n this.state = TileState.IDLE;\n this.image_ = new Image();\n if (this.crossOrigin_ !== null) {\n this.image_.crossOrigin = this.crossOrigin_;\n }\n }\n if (this.state == TileState.IDLE) {\n this.state = TileState.LOADING;\n this.changed();\n this.tileLoadFunction_(this, this.src_);\n this.unlisten_ = listenImage(\n this.image_,\n this.handleImageLoad_.bind(this),\n this.handleImageError_.bind(this)\n );\n }\n }\n\n /**\n * Discards event handlers which listen for load completion or errors.\n *\n * @private\n */\n unlistenImage_() {\n if (this.unlisten_) {\n this.unlisten_();\n this.unlisten_ = null;\n }\n }\n}\n\n/**\n * Get a 1-pixel blank image.\n * @return {HTMLCanvasElement} Blank image.\n */\nfunction getBlankImage() {\n const ctx = createCanvasContext2D(1, 1);\n ctx.fillStyle = 'rgba(0,0,0,0)';\n ctx.fillRect(0, 0, 1, 1);\n return ctx.canvas;\n}\n\nexport default ImageTile;\n","/**\n * @module ol/Kinetic\n */\n\n/**\n * @classdesc\n * Implementation of inertial deceleration for map movement.\n *\n * @api\n */\nclass Kinetic {\n /**\n * @param {number} decay Rate of decay (must be negative).\n * @param {number} minVelocity Minimum velocity (pixels/millisecond).\n * @param {number} delay Delay to consider to calculate the kinetic\n * initial values (milliseconds).\n */\n constructor(decay, minVelocity, delay) {\n /**\n * @private\n * @type {number}\n */\n this.decay_ = decay;\n\n /**\n * @private\n * @type {number}\n */\n this.minVelocity_ = minVelocity;\n\n /**\n * @private\n * @type {number}\n */\n this.delay_ = delay;\n\n /**\n * @private\n * @type {Array}\n */\n this.points_ = [];\n\n /**\n * @private\n * @type {number}\n */\n this.angle_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.initialVelocity_ = 0;\n }\n\n /**\n * FIXME empty description for jsdoc\n */\n begin() {\n this.points_.length = 0;\n this.angle_ = 0;\n this.initialVelocity_ = 0;\n }\n\n /**\n * @param {number} x X.\n * @param {number} y Y.\n */\n update(x, y) {\n this.points_.push(x, y, Date.now());\n }\n\n /**\n * @return {boolean} Whether we should do kinetic animation.\n */\n end() {\n if (this.points_.length < 6) {\n // at least 2 points are required (i.e. there must be at least 6 elements\n // in the array)\n return false;\n }\n const delay = Date.now() - this.delay_;\n const lastIndex = this.points_.length - 3;\n if (this.points_[lastIndex + 2] < delay) {\n // the last tracked point is too old, which means that the user stopped\n // panning before releasing the map\n return false;\n }\n\n // get the first point which still falls into the delay time\n let firstIndex = lastIndex - 3;\n while (firstIndex > 0 && this.points_[firstIndex + 2] > delay) {\n firstIndex -= 3;\n }\n\n const duration = this.points_[lastIndex + 2] - this.points_[firstIndex + 2];\n // we don't want a duration of 0 (divide by zero)\n // we also make sure the user panned for a duration of at least one frame\n // (1/60s) to compute sane displacement values\n if (duration < 1000 / 60) {\n return false;\n }\n\n const dx = this.points_[lastIndex] - this.points_[firstIndex];\n const dy = this.points_[lastIndex + 1] - this.points_[firstIndex + 1];\n this.angle_ = Math.atan2(dy, dx);\n this.initialVelocity_ = Math.sqrt(dx * dx + dy * dy) / duration;\n return this.initialVelocity_ > this.minVelocity_;\n }\n\n /**\n * @return {number} Total distance travelled (pixels).\n */\n getDistance() {\n return (this.minVelocity_ - this.initialVelocity_) / this.decay_;\n }\n\n /**\n * @return {number} Angle of the kinetic panning animation (radians).\n */\n getAngle() {\n return this.angle_;\n }\n}\n\nexport default Kinetic;\n","/**\n * @module ol/color\n */\nimport {assert} from './asserts.js';\nimport {clamp} from './math.js';\n\n/**\n * A color represented as a short array [red, green, blue, alpha].\n * red, green, and blue should be integers in the range 0..255 inclusive.\n * alpha should be a float in the range 0..1 inclusive. If no alpha value is\n * given then `1` will be used.\n * @typedef {Array} Color\n * @api\n */\n\n/**\n * This RegExp matches # followed by 3, 4, 6, or 8 hex digits.\n * @const\n * @type {RegExp}\n * @private\n */\nconst HEX_COLOR_RE_ = /^#([a-f0-9]{3}|[a-f0-9]{4}(?:[a-f0-9]{2}){0,2})$/i;\n\n/**\n * Regular expression for matching potential named color style strings.\n * @const\n * @type {RegExp}\n * @private\n */\nconst NAMED_COLOR_RE_ = /^([a-z]*)$|^hsla?\\(.*\\)$/i;\n\n/**\n * Return the color as an rgba string.\n * @param {Color|string} color Color.\n * @return {string} Rgba string.\n * @api\n */\nexport function asString(color) {\n if (typeof color === 'string') {\n return color;\n }\n return toString(color);\n}\n\n/**\n * Return named color as an rgba string.\n * @param {string} color Named color.\n * @return {string} Rgb string.\n */\nfunction fromNamed(color) {\n const el = document.createElement('div');\n el.style.color = color;\n if (el.style.color !== '') {\n document.body.appendChild(el);\n const rgb = getComputedStyle(el).color;\n document.body.removeChild(el);\n return rgb;\n }\n return '';\n}\n\n/**\n * @param {string} s String.\n * @return {Color} Color.\n */\nexport const fromString = (function () {\n // We maintain a small cache of parsed strings. To provide cheap LRU-like\n // semantics, whenever the cache grows too large we simply delete an\n // arbitrary 25% of the entries.\n\n /**\n * @const\n * @type {number}\n */\n const MAX_CACHE_SIZE = 1024;\n\n /**\n * @type {Object}\n */\n const cache = {};\n\n /**\n * @type {number}\n */\n let cacheSize = 0;\n\n return (\n /**\n * @param {string} s String.\n * @return {Color} Color.\n */\n function (s) {\n let color;\n if (cache.hasOwnProperty(s)) {\n color = cache[s];\n } else {\n if (cacheSize >= MAX_CACHE_SIZE) {\n let i = 0;\n for (const key in cache) {\n if ((i++ & 3) === 0) {\n delete cache[key];\n --cacheSize;\n }\n }\n }\n color = fromStringInternal_(s);\n cache[s] = color;\n ++cacheSize;\n }\n return color;\n }\n );\n})();\n\n/**\n * Return the color as an array. This function maintains a cache of calculated\n * arrays which means the result should not be modified.\n * @param {Color|string} color Color.\n * @return {Color} Color.\n * @api\n */\nexport function asArray(color) {\n if (Array.isArray(color)) {\n return color;\n }\n return fromString(color);\n}\n\n/**\n * @param {string} s String.\n * @private\n * @return {Color} Color.\n */\nfunction fromStringInternal_(s) {\n let r, g, b, a, color;\n\n if (NAMED_COLOR_RE_.exec(s)) {\n s = fromNamed(s);\n }\n\n if (HEX_COLOR_RE_.exec(s)) {\n // hex\n const n = s.length - 1; // number of hex digits\n let d; // number of digits per channel\n if (n <= 4) {\n d = 1;\n } else {\n d = 2;\n }\n const hasAlpha = n === 4 || n === 8;\n r = parseInt(s.substr(1 + 0 * d, d), 16);\n g = parseInt(s.substr(1 + 1 * d, d), 16);\n b = parseInt(s.substr(1 + 2 * d, d), 16);\n if (hasAlpha) {\n a = parseInt(s.substr(1 + 3 * d, d), 16);\n } else {\n a = 255;\n }\n if (d == 1) {\n r = (r << 4) + r;\n g = (g << 4) + g;\n b = (b << 4) + b;\n if (hasAlpha) {\n a = (a << 4) + a;\n }\n }\n color = [r, g, b, a / 255];\n } else if (s.startsWith('rgba(')) {\n // rgba()\n color = s.slice(5, -1).split(',').map(Number);\n normalize(color);\n } else if (s.startsWith('rgb(')) {\n // rgb()\n color = s.slice(4, -1).split(',').map(Number);\n color.push(1);\n normalize(color);\n } else {\n assert(false, 14); // Invalid color\n }\n return color;\n}\n\n/**\n * TODO this function is only used in the test, we probably shouldn't export it\n * @param {Color} color Color.\n * @return {Color} Clamped color.\n */\nexport function normalize(color) {\n color[0] = clamp((color[0] + 0.5) | 0, 0, 255);\n color[1] = clamp((color[1] + 0.5) | 0, 0, 255);\n color[2] = clamp((color[2] + 0.5) | 0, 0, 255);\n color[3] = clamp(color[3], 0, 1);\n return color;\n}\n\n/**\n * @param {Color} color Color.\n * @return {string} String.\n */\nexport function toString(color) {\n let r = color[0];\n if (r != (r | 0)) {\n r = (r + 0.5) | 0;\n }\n let g = color[1];\n if (g != (g | 0)) {\n g = (g + 0.5) | 0;\n }\n let b = color[2];\n if (b != (b | 0)) {\n b = (b + 0.5) | 0;\n }\n const a = color[3] === undefined ? 1 : Math.round(color[3] * 100) / 100;\n return 'rgba(' + r + ',' + g + ',' + b + ',' + a + ')';\n}\n\n/**\n * @param {string} s String.\n * @return {boolean} Whether the string is actually a valid color\n */\nexport function isStringColor(s) {\n if (NAMED_COLOR_RE_.test(s)) {\n s = fromNamed(s);\n }\n return HEX_COLOR_RE_.test(s) || s.startsWith('rgba(') || s.startsWith('rgb(');\n}\n","/**\n * @module ol/style/IconImageCache\n */\nimport {asString} from '../color.js';\n\n/**\n * @classdesc\n * Singleton class. Available through {@link module:ol/style/IconImageCache.shared}.\n */\nclass IconImageCache {\n constructor() {\n /**\n * @type {!Object}\n * @private\n */\n this.cache_ = {};\n\n /**\n * @type {number}\n * @private\n */\n this.cacheSize_ = 0;\n\n /**\n * @type {number}\n * @private\n */\n this.maxCacheSize_ = 32;\n }\n\n /**\n * FIXME empty description for jsdoc\n */\n clear() {\n this.cache_ = {};\n this.cacheSize_ = 0;\n }\n\n /**\n * @return {boolean} Can expire cache.\n */\n canExpireCache() {\n return this.cacheSize_ > this.maxCacheSize_;\n }\n\n /**\n * FIXME empty description for jsdoc\n */\n expire() {\n if (this.canExpireCache()) {\n let i = 0;\n for (const key in this.cache_) {\n const iconImage = this.cache_[key];\n if ((i++ & 3) === 0 && !iconImage.hasListener()) {\n delete this.cache_[key];\n --this.cacheSize_;\n }\n }\n }\n }\n\n /**\n * @param {string} src Src.\n * @param {?string} crossOrigin Cross origin.\n * @param {import(\"../color.js\").Color} color Color.\n * @return {import(\"./IconImage.js\").default} Icon image.\n */\n get(src, crossOrigin, color) {\n const key = getKey(src, crossOrigin, color);\n return key in this.cache_ ? this.cache_[key] : null;\n }\n\n /**\n * @param {string} src Src.\n * @param {?string} crossOrigin Cross origin.\n * @param {import(\"../color.js\").Color} color Color.\n * @param {import(\"./IconImage.js\").default} iconImage Icon image.\n */\n set(src, crossOrigin, color, iconImage) {\n const key = getKey(src, crossOrigin, color);\n this.cache_[key] = iconImage;\n ++this.cacheSize_;\n }\n\n /**\n * Set the cache size of the icon cache. Default is `32`. Change this value when\n * your map uses more than 32 different icon images and you are not caching icon\n * styles on the application level.\n * @param {number} maxCacheSize Cache max size.\n * @api\n */\n setSize(maxCacheSize) {\n this.maxCacheSize_ = maxCacheSize;\n this.expire();\n }\n}\n\n/**\n * @param {string} src Src.\n * @param {?string} crossOrigin Cross origin.\n * @param {import(\"../color.js\").Color} color Color.\n * @return {string} Cache key.\n */\nfunction getKey(src, crossOrigin, color) {\n const colorString = color ? asString(color) : 'null';\n return crossOrigin + ':' + src + ':' + colorString;\n}\n\nexport default IconImageCache;\n\n/**\n * The {@link module:ol/style/IconImageCache~IconImageCache} for\n * {@link module:ol/style/Icon~Icon} images.\n * @api\n */\nexport const shared = new IconImageCache();\n","/**\n * @module ol/layer/Property\n */\n\n/**\n * @enum {string}\n */\nexport default {\n OPACITY: 'opacity',\n VISIBLE: 'visible',\n EXTENT: 'extent',\n Z_INDEX: 'zIndex',\n MAX_RESOLUTION: 'maxResolution',\n MIN_RESOLUTION: 'minResolution',\n MAX_ZOOM: 'maxZoom',\n MIN_ZOOM: 'minZoom',\n SOURCE: 'source',\n MAP: 'map',\n};\n","/**\n * @module ol/layer/Base\n */\nimport BaseObject from '../Object.js';\nimport LayerProperty from './Property.js';\nimport {abstract} from '../util.js';\nimport {assert} from '../asserts.js';\nimport {clamp} from '../math.js';\n\n/**\n * A css color, or a function called with a view resolution returning a css color.\n *\n * @typedef {string|function(number):string} BackgroundColor\n * @api\n */\n\n/**\n * @typedef {import(\"../ObjectEventType\").Types|'change:extent'|'change:maxResolution'|'change:maxZoom'|\n * 'change:minResolution'|'change:minZoom'|'change:opacity'|'change:visible'|'change:zIndex'} BaseLayerObjectEventTypes\n */\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature &\n * import(\"../Observable\").OnSignature &\n * import(\"../Observable\").CombinedOnSignature} BaseLayerOnSignature\n */\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-layer'] A CSS class name to set to the layer element.\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {import(\"../extent.js\").Extent} [extent] The bounding extent for layer rendering. The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex] The z-index for layer rendering. At rendering time, the layers\n * will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed\n * for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`\n * method was used.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {number} [minZoom] The minimum view zoom level (exclusive) above which this layer will be\n * visible.\n * @property {number} [maxZoom] The maximum view zoom level (inclusive) at which this layer will\n * be visible.\n * @property {BackgroundColor} [background] Background color for the layer. If not specified, no background\n * will be rendered.\n * @property {Object} [properties] Arbitrary observable properties. Can be accessed with `#get()` and `#set()`.\n */\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Note that with {@link module:ol/layer/Base~BaseLayer} and all its subclasses, any property set in\n * the options is set as a {@link module:ol/Object~BaseObject} property on the layer object, so\n * is observable, and has get/set accessors.\n *\n * @api\n */\nclass BaseLayer extends BaseObject {\n /**\n * @param {Options} options Layer options.\n */\n constructor(options) {\n super();\n\n /***\n * @type {BaseLayerOnSignature}\n */\n this.on;\n\n /***\n * @type {BaseLayerOnSignature}\n */\n this.once;\n\n /***\n * @type {BaseLayerOnSignature}\n */\n this.un;\n\n /**\n * @type {BackgroundColor|false}\n * @private\n */\n this.background_ = options.background;\n\n /**\n * @type {Object}\n */\n const properties = Object.assign({}, options);\n if (typeof options.properties === 'object') {\n delete properties.properties;\n Object.assign(properties, options.properties);\n }\n\n properties[LayerProperty.OPACITY] =\n options.opacity !== undefined ? options.opacity : 1;\n assert(typeof properties[LayerProperty.OPACITY] === 'number', 64); // Layer opacity must be a number\n\n properties[LayerProperty.VISIBLE] =\n options.visible !== undefined ? options.visible : true;\n properties[LayerProperty.Z_INDEX] = options.zIndex;\n properties[LayerProperty.MAX_RESOLUTION] =\n options.maxResolution !== undefined ? options.maxResolution : Infinity;\n properties[LayerProperty.MIN_RESOLUTION] =\n options.minResolution !== undefined ? options.minResolution : 0;\n properties[LayerProperty.MIN_ZOOM] =\n options.minZoom !== undefined ? options.minZoom : -Infinity;\n properties[LayerProperty.MAX_ZOOM] =\n options.maxZoom !== undefined ? options.maxZoom : Infinity;\n\n /**\n * @type {string}\n * @private\n */\n this.className_ =\n properties.className !== undefined ? properties.className : 'ol-layer';\n delete properties.className;\n\n this.setProperties(properties);\n\n /**\n * @type {import(\"./Layer.js\").State}\n * @private\n */\n this.state_ = null;\n }\n\n /**\n * Get the background for this layer.\n * @return {BackgroundColor|false} Layer background.\n */\n getBackground() {\n return this.background_;\n }\n\n /**\n * @return {string} CSS class name.\n */\n getClassName() {\n return this.className_;\n }\n\n /**\n * This method is not meant to be called by layers or layer renderers because the state\n * is incorrect if the layer is included in a layer group.\n *\n * @param {boolean} [managed] Layer is managed.\n * @return {import(\"./Layer.js\").State} Layer state.\n */\n getLayerState(managed) {\n /** @type {import(\"./Layer.js\").State} */\n const state =\n this.state_ ||\n /** @type {?} */ ({\n layer: this,\n managed: managed === undefined ? true : managed,\n });\n const zIndex = this.getZIndex();\n state.opacity = clamp(Math.round(this.getOpacity() * 100) / 100, 0, 1);\n state.visible = this.getVisible();\n state.extent = this.getExtent();\n state.zIndex = zIndex === undefined && !state.managed ? Infinity : zIndex;\n state.maxResolution = this.getMaxResolution();\n state.minResolution = Math.max(this.getMinResolution(), 0);\n state.minZoom = this.getMinZoom();\n state.maxZoom = this.getMaxZoom();\n this.state_ = state;\n\n return state;\n }\n\n /**\n * @abstract\n * @param {Array} [array] Array of layers (to be\n * modified in place).\n * @return {Array} Array of layers.\n */\n getLayersArray(array) {\n return abstract();\n }\n\n /**\n * @abstract\n * @param {Array} [states] Optional list of layer\n * states (to be modified in place).\n * @return {Array} List of layer states.\n */\n getLayerStatesArray(states) {\n return abstract();\n }\n\n /**\n * Return the {@link module:ol/extent~Extent extent} of the layer or `undefined` if it\n * will be visible regardless of extent.\n * @return {import(\"../extent.js\").Extent|undefined} The layer extent.\n * @observable\n * @api\n */\n getExtent() {\n return /** @type {import(\"../extent.js\").Extent|undefined} */ (\n this.get(LayerProperty.EXTENT)\n );\n }\n\n /**\n * Return the maximum resolution of the layer.\n * @return {number} The maximum resolution of the layer.\n * @observable\n * @api\n */\n getMaxResolution() {\n return /** @type {number} */ (this.get(LayerProperty.MAX_RESOLUTION));\n }\n\n /**\n * Return the minimum resolution of the layer.\n * @return {number} The minimum resolution of the layer.\n * @observable\n * @api\n */\n getMinResolution() {\n return /** @type {number} */ (this.get(LayerProperty.MIN_RESOLUTION));\n }\n\n /**\n * Return the minimum zoom level of the layer.\n * @return {number} The minimum zoom level of the layer.\n * @observable\n * @api\n */\n getMinZoom() {\n return /** @type {number} */ (this.get(LayerProperty.MIN_ZOOM));\n }\n\n /**\n * Return the maximum zoom level of the layer.\n * @return {number} The maximum zoom level of the layer.\n * @observable\n * @api\n */\n getMaxZoom() {\n return /** @type {number} */ (this.get(LayerProperty.MAX_ZOOM));\n }\n\n /**\n * Return the opacity of the layer (between 0 and 1).\n * @return {number} The opacity of the layer.\n * @observable\n * @api\n */\n getOpacity() {\n return /** @type {number} */ (this.get(LayerProperty.OPACITY));\n }\n\n /**\n * @abstract\n * @return {import(\"../source/Source.js\").State} Source state.\n */\n getSourceState() {\n return abstract();\n }\n\n /**\n * Return the visibility of the layer (`true` or `false`).\n * @return {boolean} The visibility of the layer.\n * @observable\n * @api\n */\n getVisible() {\n return /** @type {boolean} */ (this.get(LayerProperty.VISIBLE));\n }\n\n /**\n * Return the Z-index of the layer, which is used to order layers before\n * rendering. The default Z-index is 0.\n * @return {number} The Z-index of the layer.\n * @observable\n * @api\n */\n getZIndex() {\n return /** @type {number} */ (this.get(LayerProperty.Z_INDEX));\n }\n\n /**\n * Sets the background color.\n * @param {BackgroundColor} [background] Background color.\n */\n setBackground(background) {\n this.background_ = background;\n this.changed();\n }\n\n /**\n * Set the extent at which the layer is visible. If `undefined`, the layer\n * will be visible at all extents.\n * @param {import(\"../extent.js\").Extent|undefined} extent The extent of the layer.\n * @observable\n * @api\n */\n setExtent(extent) {\n this.set(LayerProperty.EXTENT, extent);\n }\n\n /**\n * Set the maximum resolution at which the layer is visible.\n * @param {number} maxResolution The maximum resolution of the layer.\n * @observable\n * @api\n */\n setMaxResolution(maxResolution) {\n this.set(LayerProperty.MAX_RESOLUTION, maxResolution);\n }\n\n /**\n * Set the minimum resolution at which the layer is visible.\n * @param {number} minResolution The minimum resolution of the layer.\n * @observable\n * @api\n */\n setMinResolution(minResolution) {\n this.set(LayerProperty.MIN_RESOLUTION, minResolution);\n }\n\n /**\n * Set the maximum zoom (exclusive) at which the layer is visible.\n * Note that the zoom levels for layer visibility are based on the\n * view zoom level, which may be different from a tile source zoom level.\n * @param {number} maxZoom The maximum zoom of the layer.\n * @observable\n * @api\n */\n setMaxZoom(maxZoom) {\n this.set(LayerProperty.MAX_ZOOM, maxZoom);\n }\n\n /**\n * Set the minimum zoom (inclusive) at which the layer is visible.\n * Note that the zoom levels for layer visibility are based on the\n * view zoom level, which may be different from a tile source zoom level.\n * @param {number} minZoom The minimum zoom of the layer.\n * @observable\n * @api\n */\n setMinZoom(minZoom) {\n this.set(LayerProperty.MIN_ZOOM, minZoom);\n }\n\n /**\n * Set the opacity of the layer, allowed values range from 0 to 1.\n * @param {number} opacity The opacity of the layer.\n * @observable\n * @api\n */\n setOpacity(opacity) {\n assert(typeof opacity === 'number', 64); // Layer opacity must be a number\n this.set(LayerProperty.OPACITY, opacity);\n }\n\n /**\n * Set the visibility of the layer (`true` or `false`).\n * @param {boolean} visible The visibility of the layer.\n * @observable\n * @api\n */\n setVisible(visible) {\n this.set(LayerProperty.VISIBLE, visible);\n }\n\n /**\n * Set Z-index of the layer, which is used to order layers before rendering.\n * The default Z-index is 0.\n * @param {number} zindex The z-index of the layer.\n * @observable\n * @api\n */\n setZIndex(zindex) {\n this.set(LayerProperty.Z_INDEX, zindex);\n }\n\n /**\n * Clean up.\n */\n disposeInternal() {\n if (this.state_) {\n this.state_.layer = null;\n this.state_ = null;\n }\n super.disposeInternal();\n }\n}\n\nexport default BaseLayer;\n","/**\n * @module ol/render/EventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n /**\n * Triggered before a layer is rendered.\n * @event module:ol/render/Event~RenderEvent#prerender\n * @api\n */\n PRERENDER: 'prerender',\n\n /**\n * Triggered after a layer is rendered.\n * @event module:ol/render/Event~RenderEvent#postrender\n * @api\n */\n POSTRENDER: 'postrender',\n\n /**\n * Triggered before layers are composed. When dispatched by the map, the event object will not have\n * a `context` set. When dispatched by a layer, the event object will have a `context` set. Only\n * WebGL layers currently dispatch this event.\n * @event module:ol/render/Event~RenderEvent#precompose\n * @api\n */\n PRECOMPOSE: 'precompose',\n\n /**\n * Triggered after layers are composed. When dispatched by the map, the event object will not have\n * a `context` set. When dispatched by a layer, the event object will have a `context` set. Only\n * WebGL layers currently dispatch this event.\n * @event module:ol/render/Event~RenderEvent#postcompose\n * @api\n */\n POSTCOMPOSE: 'postcompose',\n\n /**\n * Triggered when rendering is complete, i.e. all sources and tiles have\n * finished loading for the current viewport, and all tiles are faded in.\n * The event object will not have a `context` set.\n * @event module:ol/render/Event~RenderEvent#rendercomplete\n * @api\n */\n RENDERCOMPLETE: 'rendercomplete',\n};\n\n/**\n * @typedef {'postrender'|'precompose'|'postcompose'|'rendercomplete'} MapRenderEventTypes\n */\n\n/**\n * @typedef {'postrender'|'prerender'} LayerRenderEventTypes\n */\n","/**\n * @module ol/layer/Layer\n */\nimport BaseLayer from './Base.js';\nimport EventType from '../events/EventType.js';\nimport LayerProperty from './Property.js';\nimport RenderEventType from '../render/EventType.js';\nimport {assert} from '../asserts.js';\nimport {listen, unlistenByKey} from '../events.js';\n\n/**\n * @typedef {function(import(\"../Map.js\").FrameState):HTMLElement} RenderFunction\n */\n\n/**\n * @typedef {'sourceready'|'change:source'} LayerEventType\n */\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature &\n * import(\"../Observable\").OnSignature &\n * import(\"../Observable\").OnSignature &\n * import(\"../Observable\").CombinedOnSignature} LayerOnSignature\n */\n\n/**\n * @template {import(\"../source/Source.js\").default} [SourceType=import(\"../source/Source.js\").default]\n * @typedef {Object} Options\n * @property {string} [className='ol-layer'] A CSS class name to set to the layer element.\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {import(\"../extent.js\").Extent} [extent] The bounding extent for layer rendering. The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex] The z-index for layer rendering. At rendering time, the layers\n * will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed\n * for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`\n * method was used.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {number} [minZoom] The minimum view zoom level (exclusive) above which this layer will be\n * visible.\n * @property {number} [maxZoom] The maximum view zoom level (inclusive) at which this layer will\n * be visible.\n * @property {SourceType} [source] Source for this layer. If not provided to the constructor,\n * the source can be set by calling {@link module:ol/layer/Layer~Layer#setSource layer.setSource(source)} after\n * construction.\n * @property {import(\"../Map.js\").default|null} [map] Map.\n * @property {RenderFunction} [render] Render function. Takes the frame state as input and is expected to return an\n * HTML element. Will overwrite the default rendering for the layer.\n * @property {Object} [properties] Arbitrary observable properties. Can be accessed with `#get()` and `#set()`.\n */\n\n/**\n * @typedef {Object} State\n * @property {import(\"./Layer.js\").default} layer Layer.\n * @property {number} opacity Opacity, the value is rounded to two digits to appear after the decimal point.\n * @property {boolean} visible Visible.\n * @property {boolean} managed Managed.\n * @property {import(\"../extent.js\").Extent} [extent] Extent.\n * @property {number} zIndex ZIndex.\n * @property {number} maxResolution Maximum resolution.\n * @property {number} minResolution Minimum resolution.\n * @property {number} minZoom Minimum zoom.\n * @property {number} maxZoom Maximum zoom.\n */\n\n/**\n * @classdesc\n * Base class from which all layer types are derived. This should only be instantiated\n * in the case where a custom layer is added to the map with a custom `render` function.\n * Such a function can be specified in the `options` object, and is expected to return an HTML element.\n *\n * A visual representation of raster or vector map data.\n * Layers group together those properties that pertain to how the data is to be\n * displayed, irrespective of the source of that data.\n *\n * Layers are usually added to a map with [map.addLayer()]{@link import(\"../Map.js\").default#addLayer}.\n * Components like {@link module:ol/interaction/Draw~Draw} use unmanaged layers\n * internally. These unmanaged layers are associated with the map using\n * [layer.setMap()]{@link module:ol/layer/Layer~Layer#setMap} instead.\n *\n * A generic `change` event is fired when the state of the source changes.\n * A `sourceready` event is fired when the layer's source is ready.\n *\n * @fires import(\"../render/Event.js\").RenderEvent#prerender\n * @fires import(\"../render/Event.js\").RenderEvent#postrender\n * @fires import(\"../events/Event.js\").BaseEvent#sourceready\n *\n * @template {import(\"../source/Source.js\").default} [SourceType=import(\"../source/Source.js\").default]\n * @template {import(\"../renderer/Layer.js\").default} [RendererType=import(\"../renderer/Layer.js\").default]\n * @api\n */\nclass Layer extends BaseLayer {\n /**\n * @param {Options} options Layer options.\n */\n constructor(options) {\n const baseOptions = Object.assign({}, options);\n delete baseOptions.source;\n\n super(baseOptions);\n\n /***\n * @type {LayerOnSignature}\n */\n this.on;\n\n /***\n * @type {LayerOnSignature}\n */\n this.once;\n\n /***\n * @type {LayerOnSignature}\n */\n this.un;\n\n /**\n * @private\n * @type {?import(\"../events.js\").EventsKey}\n */\n this.mapPrecomposeKey_ = null;\n\n /**\n * @private\n * @type {?import(\"../events.js\").EventsKey}\n */\n this.mapRenderKey_ = null;\n\n /**\n * @private\n * @type {?import(\"../events.js\").EventsKey}\n */\n this.sourceChangeKey_ = null;\n\n /**\n * @private\n * @type {RendererType}\n */\n this.renderer_ = null;\n\n /**\n * @private\n * @type {boolean}\n */\n this.sourceReady_ = false;\n\n /**\n * @protected\n * @type {boolean}\n */\n this.rendered = false;\n\n // Overwrite default render method with a custom one\n if (options.render) {\n this.render = options.render;\n }\n\n if (options.map) {\n this.setMap(options.map);\n }\n\n this.addChangeListener(\n LayerProperty.SOURCE,\n this.handleSourcePropertyChange_\n );\n\n const source = options.source\n ? /** @type {SourceType} */ (options.source)\n : null;\n this.setSource(source);\n }\n\n /**\n * @param {Array} [array] Array of layers (to be modified in place).\n * @return {Array} Array of layers.\n */\n getLayersArray(array) {\n array = array ? array : [];\n array.push(this);\n return array;\n }\n\n /**\n * @param {Array} [states] Optional list of layer states (to be modified in place).\n * @return {Array} List of layer states.\n */\n getLayerStatesArray(states) {\n states = states ? states : [];\n states.push(this.getLayerState());\n return states;\n }\n\n /**\n * Get the layer source.\n * @return {SourceType|null} The layer source (or `null` if not yet set).\n * @observable\n * @api\n */\n getSource() {\n return /** @type {SourceType} */ (this.get(LayerProperty.SOURCE)) || null;\n }\n\n /**\n * @return {SourceType|null} The source being rendered.\n */\n getRenderSource() {\n return this.getSource();\n }\n\n /**\n * @return {import(\"../source/Source.js\").State} Source state.\n */\n getSourceState() {\n const source = this.getSource();\n return !source ? 'undefined' : source.getState();\n }\n\n /**\n * @private\n */\n handleSourceChange_() {\n this.changed();\n if (this.sourceReady_ || this.getSource().getState() !== 'ready') {\n return;\n }\n this.sourceReady_ = true;\n this.dispatchEvent('sourceready');\n }\n\n /**\n * @private\n */\n handleSourcePropertyChange_() {\n if (this.sourceChangeKey_) {\n unlistenByKey(this.sourceChangeKey_);\n this.sourceChangeKey_ = null;\n }\n this.sourceReady_ = false;\n const source = this.getSource();\n if (source) {\n this.sourceChangeKey_ = listen(\n source,\n EventType.CHANGE,\n this.handleSourceChange_,\n this\n );\n if (source.getState() === 'ready') {\n this.sourceReady_ = true;\n setTimeout(() => {\n this.dispatchEvent('sourceready');\n }, 0);\n }\n }\n this.changed();\n }\n\n /**\n * @param {import(\"../pixel\").Pixel} pixel Pixel.\n * @return {Promise>} Promise that resolves with\n * an array of features.\n */\n getFeatures(pixel) {\n if (!this.renderer_) {\n return Promise.resolve([]);\n }\n return this.renderer_.getFeatures(pixel);\n }\n\n /**\n * @param {import(\"../pixel\").Pixel} pixel Pixel.\n * @return {Uint8ClampedArray|Uint8Array|Float32Array|DataView|null} Pixel data.\n */\n getData(pixel) {\n if (!this.renderer_ || !this.rendered) {\n return null;\n }\n return this.renderer_.getData(pixel);\n }\n\n /**\n * In charge to manage the rendering of the layer. One layer type is\n * bounded with one layer renderer.\n * @param {?import(\"../Map.js\").FrameState} frameState Frame state.\n * @param {HTMLElement} target Target which the renderer may (but need not) use\n * for rendering its content.\n * @return {HTMLElement} The rendered element.\n */\n render(frameState, target) {\n const layerRenderer = this.getRenderer();\n\n if (layerRenderer.prepareFrame(frameState)) {\n this.rendered = true;\n return layerRenderer.renderFrame(frameState, target);\n }\n }\n\n /**\n * Called when a layer is not visible during a map render.\n */\n unrender() {\n this.rendered = false;\n }\n\n /**\n * For use inside the library only.\n * @param {import(\"../Map.js\").default|null} map Map.\n */\n setMapInternal(map) {\n if (!map) {\n this.unrender();\n }\n this.set(LayerProperty.MAP, map);\n }\n\n /**\n * For use inside the library only.\n * @return {import(\"../Map.js\").default|null} Map.\n */\n getMapInternal() {\n return this.get(LayerProperty.MAP);\n }\n\n /**\n * Sets the layer to be rendered on top of other layers on a map. The map will\n * not manage this layer in its layers collection. This\n * is useful for temporary layers. To remove an unmanaged layer from the map,\n * use `#setMap(null)`.\n *\n * To add the layer to a map and have it managed by the map, use\n * {@link module:ol/Map~Map#addLayer} instead.\n * @param {import(\"../Map.js\").default|null} map Map.\n * @api\n */\n setMap(map) {\n if (this.mapPrecomposeKey_) {\n unlistenByKey(this.mapPrecomposeKey_);\n this.mapPrecomposeKey_ = null;\n }\n if (!map) {\n this.changed();\n }\n if (this.mapRenderKey_) {\n unlistenByKey(this.mapRenderKey_);\n this.mapRenderKey_ = null;\n }\n if (map) {\n this.mapPrecomposeKey_ = listen(\n map,\n RenderEventType.PRECOMPOSE,\n function (evt) {\n const renderEvent =\n /** @type {import(\"../render/Event.js\").default} */ (evt);\n const layerStatesArray = renderEvent.frameState.layerStatesArray;\n const layerState = this.getLayerState(false);\n // A layer can only be added to the map once. Use either `layer.setMap()` or `map.addLayer()`, not both.\n assert(\n !layerStatesArray.some(function (arrayLayerState) {\n return arrayLayerState.layer === layerState.layer;\n }),\n 67\n );\n layerStatesArray.push(layerState);\n },\n this\n );\n this.mapRenderKey_ = listen(this, EventType.CHANGE, map.render, map);\n this.changed();\n }\n }\n\n /**\n * Set the layer source.\n * @param {SourceType|null} source The layer source.\n * @observable\n * @api\n */\n setSource(source) {\n this.set(LayerProperty.SOURCE, source);\n }\n\n /**\n * Get the renderer for this layer.\n * @return {RendererType|null} The layer renderer.\n */\n getRenderer() {\n if (!this.renderer_) {\n this.renderer_ = this.createRenderer();\n }\n return this.renderer_;\n }\n\n /**\n * @return {boolean} The layer has a renderer.\n */\n hasRenderer() {\n return !!this.renderer_;\n }\n\n /**\n * Create a renderer for this layer.\n * @return {RendererType} A layer renderer.\n * @protected\n */\n createRenderer() {\n return null;\n }\n\n /**\n * Clean up.\n */\n disposeInternal() {\n if (this.renderer_) {\n this.renderer_.dispose();\n delete this.renderer_;\n }\n\n this.setSource(null);\n super.disposeInternal();\n }\n}\n\n/**\n * Return `true` if the layer is visible and if the provided view state\n * has resolution and zoom levels that are in range of the layer's min/max.\n * @param {State} layerState Layer state.\n * @param {import(\"../View.js\").State} viewState View state.\n * @return {boolean} The layer is visible at the given view state.\n */\nexport function inView(layerState, viewState) {\n if (!layerState.visible) {\n return false;\n }\n const resolution = viewState.resolution;\n if (\n resolution < layerState.minResolution ||\n resolution >= layerState.maxResolution\n ) {\n return false;\n }\n const zoom = viewState.zoom;\n return zoom > layerState.minZoom && zoom <= layerState.maxZoom;\n}\n\nexport default Layer;\n","/**\n * @module ol/renderer/Map\n */\nimport Disposable from '../Disposable.js';\nimport {TRUE} from '../functions.js';\nimport {abstract} from '../util.js';\nimport {compose as composeTransform, makeInverse} from '../transform.js';\nimport {getWidth} from '../extent.js';\nimport {shared as iconImageCache} from '../style/IconImageCache.js';\nimport {inView} from '../layer/Layer.js';\nimport {wrapX} from '../coordinate.js';\n\n/**\n * @typedef HitMatch\n * @property {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @property {import(\"../layer/Layer.js\").default} layer Layer.\n * @property {import(\"../geom/SimpleGeometry.js\").default} geometry Geometry.\n * @property {number} distanceSq Squared distance.\n * @property {import(\"./vector.js\").FeatureCallback} callback Callback.\n * @template T\n */\n\n/**\n * @abstract\n */\nclass MapRenderer extends Disposable {\n /**\n * @param {import(\"../Map.js\").default} map Map.\n */\n constructor(map) {\n super();\n\n /**\n * @private\n * @type {import(\"../Map.js\").default}\n */\n this.map_ = map;\n }\n\n /**\n * @abstract\n * @param {import(\"../render/EventType.js\").default} type Event type.\n * @param {import(\"../Map.js\").FrameState} frameState Frame state.\n */\n dispatchRenderEvent(type, frameState) {\n abstract();\n }\n\n /**\n * @param {import(\"../Map.js\").FrameState} frameState FrameState.\n * @protected\n */\n calculateMatrices2D(frameState) {\n const viewState = frameState.viewState;\n const coordinateToPixelTransform = frameState.coordinateToPixelTransform;\n const pixelToCoordinateTransform = frameState.pixelToCoordinateTransform;\n\n composeTransform(\n coordinateToPixelTransform,\n frameState.size[0] / 2,\n frameState.size[1] / 2,\n 1 / viewState.resolution,\n -1 / viewState.resolution,\n -viewState.rotation,\n -viewState.center[0],\n -viewState.center[1]\n );\n\n makeInverse(pixelToCoordinateTransform, coordinateToPixelTransform);\n }\n\n /**\n * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {import(\"../Map.js\").FrameState} frameState FrameState.\n * @param {number} hitTolerance Hit tolerance in pixels.\n * @param {boolean} checkWrapped Check for wrapped geometries.\n * @param {import(\"./vector.js\").FeatureCallback} callback Feature callback.\n * @param {S} thisArg Value to use as `this` when executing `callback`.\n * @param {function(this: U, import(\"../layer/Layer.js\").default): boolean} layerFilter Layer filter\n * function, only layers which are visible and for which this function\n * returns `true` will be tested for features. By default, all visible\n * layers will be tested.\n * @param {U} thisArg2 Value to use as `this` when executing `layerFilter`.\n * @return {T|undefined} Callback result.\n * @template S,T,U\n */\n forEachFeatureAtCoordinate(\n coordinate,\n frameState,\n hitTolerance,\n checkWrapped,\n callback,\n thisArg,\n layerFilter,\n thisArg2\n ) {\n let result;\n const viewState = frameState.viewState;\n\n /**\n * @param {boolean} managed Managed layer.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {import(\"../layer/Layer.js\").default} layer Layer.\n * @param {import(\"../geom/Geometry.js\").default} geometry Geometry.\n * @return {T|undefined} Callback result.\n */\n function forEachFeatureAtCoordinate(managed, feature, layer, geometry) {\n return callback.call(thisArg, feature, managed ? layer : null, geometry);\n }\n\n const projection = viewState.projection;\n\n const translatedCoordinate = wrapX(coordinate.slice(), projection);\n const offsets = [[0, 0]];\n if (projection.canWrapX() && checkWrapped) {\n const projectionExtent = projection.getExtent();\n const worldWidth = getWidth(projectionExtent);\n offsets.push([-worldWidth, 0], [worldWidth, 0]);\n }\n\n const layerStates = frameState.layerStatesArray;\n const numLayers = layerStates.length;\n\n const matches = /** @type {Array>} */ ([]);\n const tmpCoord = [];\n for (let i = 0; i < offsets.length; i++) {\n for (let j = numLayers - 1; j >= 0; --j) {\n const layerState = layerStates[j];\n const layer = layerState.layer;\n if (\n layer.hasRenderer() &&\n inView(layerState, viewState) &&\n layerFilter.call(thisArg2, layer)\n ) {\n const layerRenderer = layer.getRenderer();\n const source = layer.getSource();\n if (layerRenderer && source) {\n const coordinates = source.getWrapX()\n ? translatedCoordinate\n : coordinate;\n const callback = forEachFeatureAtCoordinate.bind(\n null,\n layerState.managed\n );\n tmpCoord[0] = coordinates[0] + offsets[i][0];\n tmpCoord[1] = coordinates[1] + offsets[i][1];\n result = layerRenderer.forEachFeatureAtCoordinate(\n tmpCoord,\n frameState,\n hitTolerance,\n callback,\n matches\n );\n }\n if (result) {\n return result;\n }\n }\n }\n }\n if (matches.length === 0) {\n return undefined;\n }\n const order = 1 / matches.length;\n matches.forEach((m, i) => (m.distanceSq += i * order));\n matches.sort((a, b) => a.distanceSq - b.distanceSq);\n matches.some((m) => {\n return (result = m.callback(m.feature, m.layer, m.geometry));\n });\n return result;\n }\n\n /**\n * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {import(\"../Map.js\").FrameState} frameState FrameState.\n * @param {number} hitTolerance Hit tolerance in pixels.\n * @param {boolean} checkWrapped Check for wrapped geometries.\n * @param {function(this: U, import(\"../layer/Layer.js\").default): boolean} layerFilter Layer filter\n * function, only layers which are visible and for which this function\n * returns `true` will be tested for features. By default, all visible\n * layers will be tested.\n * @param {U} thisArg Value to use as `this` when executing `layerFilter`.\n * @return {boolean} Is there a feature at the given coordinate?\n * @template U\n */\n hasFeatureAtCoordinate(\n coordinate,\n frameState,\n hitTolerance,\n checkWrapped,\n layerFilter,\n thisArg\n ) {\n const hasFeature = this.forEachFeatureAtCoordinate(\n coordinate,\n frameState,\n hitTolerance,\n checkWrapped,\n TRUE,\n this,\n layerFilter,\n thisArg\n );\n\n return hasFeature !== undefined;\n }\n\n /**\n * @return {import(\"../Map.js\").default} Map.\n */\n getMap() {\n return this.map_;\n }\n\n /**\n * Render.\n * @abstract\n * @param {?import(\"../Map.js\").FrameState} frameState Frame state.\n */\n renderFrame(frameState) {\n abstract();\n }\n\n /**\n * @param {import(\"../Map.js\").FrameState} frameState Frame state.\n * @protected\n */\n scheduleExpireIconCache(frameState) {\n if (iconImageCache.canExpireCache()) {\n frameState.postRenderFunctions.push(expireIconCache);\n }\n }\n}\n\n/**\n * @param {import(\"../Map.js\").default} map Map.\n * @param {import(\"../Map.js\").FrameState} frameState Frame state.\n */\nfunction expireIconCache(map, frameState) {\n iconImageCache.expire();\n}\n\nexport default MapRenderer;\n","/**\n * @module ol/render/Event\n */\n\nimport Event from '../events/Event.js';\n\nclass RenderEvent extends Event {\n /**\n * @param {import(\"./EventType.js\").default} type Type.\n * @param {import(\"../transform.js\").Transform} [inversePixelTransform] Transform for\n * CSS pixels to rendered pixels.\n * @param {import(\"../Map.js\").FrameState} [frameState] Frame state.\n * @param {?(CanvasRenderingContext2D|WebGLRenderingContext)} [context] Context.\n */\n constructor(type, inversePixelTransform, frameState, context) {\n super(type);\n\n /**\n * Transform from CSS pixels (relative to the top-left corner of the map viewport)\n * to rendered pixels on this event's `context`. Only available when a Canvas renderer is used, null otherwise.\n * @type {import(\"../transform.js\").Transform|undefined}\n * @api\n */\n this.inversePixelTransform = inversePixelTransform;\n\n /**\n * An object representing the current render frame state.\n * @type {import(\"../Map.js\").FrameState|undefined}\n * @api\n */\n this.frameState = frameState;\n\n /**\n * Canvas context. Not available when the event is dispatched by the map. For Canvas 2D layers,\n * the context will be the 2D rendering context. For WebGL layers, the context will be the WebGL\n * context.\n * @type {CanvasRenderingContext2D|WebGLRenderingContext|undefined}\n * @api\n */\n this.context = context;\n }\n}\n\nexport default RenderEvent;\n","/**\n * @module ol/css\n */\n\n/**\n * @typedef {Object} FontParameters\n * @property {string} style Style.\n * @property {string} variant Variant.\n * @property {string} weight Weight.\n * @property {string} size Size.\n * @property {string} lineHeight LineHeight.\n * @property {string} family Family.\n * @property {Array} families Families.\n */\n\n/**\n * The CSS class for hidden feature.\n *\n * @const\n * @type {string}\n */\nexport const CLASS_HIDDEN = 'ol-hidden';\n\n/**\n * The CSS class that we'll give the DOM elements to have them selectable.\n *\n * @const\n * @type {string}\n */\nexport const CLASS_SELECTABLE = 'ol-selectable';\n\n/**\n * The CSS class that we'll give the DOM elements to have them unselectable.\n *\n * @const\n * @type {string}\n */\nexport const CLASS_UNSELECTABLE = 'ol-unselectable';\n\n/**\n * The CSS class for unsupported feature.\n *\n * @const\n * @type {string}\n */\nexport const CLASS_UNSUPPORTED = 'ol-unsupported';\n\n/**\n * The CSS class for controls.\n *\n * @const\n * @type {string}\n */\nexport const CLASS_CONTROL = 'ol-control';\n\n/**\n * The CSS class that we'll give the DOM elements that are collapsed, i.e.\n * to those elements which usually can be expanded.\n *\n * @const\n * @type {string}\n */\nexport const CLASS_COLLAPSED = 'ol-collapsed';\n\n/**\n * From https://stackoverflow.com/questions/10135697/regex-to-parse-any-css-font\n * @type {RegExp}\n */\nconst fontRegEx = new RegExp(\n [\n '^\\\\s*(?=(?:(?:[-a-z]+\\\\s*){0,2}(italic|oblique))?)',\n '(?=(?:(?:[-a-z]+\\\\s*){0,2}(small-caps))?)',\n '(?=(?:(?:[-a-z]+\\\\s*){0,2}(bold(?:er)?|lighter|[1-9]00 ))?)',\n '(?:(?:normal|\\\\1|\\\\2|\\\\3)\\\\s*){0,3}((?:xx?-)?',\n '(?:small|large)|medium|smaller|larger|[\\\\.\\\\d]+(?:\\\\%|in|[cem]m|ex|p[ctx]))',\n '(?:\\\\s*\\\\/\\\\s*(normal|[\\\\.\\\\d]+(?:\\\\%|in|[cem]m|ex|p[ctx])?))',\n '?\\\\s*([-,\\\\\"\\\\\\'\\\\sa-z]+?)\\\\s*$',\n ].join(''),\n 'i'\n);\nconst fontRegExMatchIndex = [\n 'style',\n 'variant',\n 'weight',\n 'size',\n 'lineHeight',\n 'family',\n];\n\n/**\n * Get the list of font families from a font spec. Note that this doesn't work\n * for font families that have commas in them.\n * @param {string} fontSpec The CSS font property.\n * @return {FontParameters|null} The font parameters (or null if the input spec is invalid).\n */\nexport const getFontParameters = function (fontSpec) {\n const match = fontSpec.match(fontRegEx);\n if (!match) {\n return null;\n }\n const style = /** @type {FontParameters} */ ({\n lineHeight: 'normal',\n size: '1.2em',\n style: 'normal',\n weight: 'normal',\n variant: 'normal',\n });\n for (let i = 0, ii = fontRegExMatchIndex.length; i < ii; ++i) {\n const value = match[i + 1];\n if (value !== undefined) {\n style[fontRegExMatchIndex[i]] = value;\n }\n }\n style.families = style.family.split(/,\\s?/);\n return style;\n};\n","/**\n * @module ol/render/canvas\n */\nimport BaseObject from '../Object.js';\nimport {WORKER_OFFSCREEN_CANVAS} from '../has.js';\nimport {clear} from '../obj.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {getFontParameters} from '../css.js';\n\n/**\n * @typedef {'Circle' | 'Image' | 'LineString' | 'Polygon' | 'Text' | 'Default'} BuilderType\n */\n\n/**\n * @typedef {Object} FillState\n * @property {import(\"../colorlike.js\").ColorLike} fillStyle FillStyle.\n */\n\n/**\n * @typedef Label\n * @property {number} width Width.\n * @property {number} height Height.\n * @property {Array} contextInstructions ContextInstructions.\n */\n\n/**\n * @typedef {Object} FillStrokeState\n * @property {import(\"../colorlike.js\").ColorLike} [currentFillStyle] Current FillStyle.\n * @property {import(\"../colorlike.js\").ColorLike} [currentStrokeStyle] Current StrokeStyle.\n * @property {CanvasLineCap} [currentLineCap] Current LineCap.\n * @property {Array} currentLineDash Current LineDash.\n * @property {number} [currentLineDashOffset] Current LineDashOffset.\n * @property {CanvasLineJoin} [currentLineJoin] Current LineJoin.\n * @property {number} [currentLineWidth] Current LineWidth.\n * @property {number} [currentMiterLimit] Current MiterLimit.\n * @property {number} [lastStroke] Last stroke.\n * @property {import(\"../colorlike.js\").ColorLike} [fillStyle] FillStyle.\n * @property {import(\"../colorlike.js\").ColorLike} [strokeStyle] StrokeStyle.\n * @property {CanvasLineCap} [lineCap] LineCap.\n * @property {Array} lineDash LineDash.\n * @property {number} [lineDashOffset] LineDashOffset.\n * @property {CanvasLineJoin} [lineJoin] LineJoin.\n * @property {number} [lineWidth] LineWidth.\n * @property {number} [miterLimit] MiterLimit.\n */\n\n/**\n * @typedef {Object} StrokeState\n * @property {CanvasLineCap} lineCap LineCap.\n * @property {Array} lineDash LineDash.\n * @property {number} lineDashOffset LineDashOffset.\n * @property {CanvasLineJoin} lineJoin LineJoin.\n * @property {number} lineWidth LineWidth.\n * @property {number} miterLimit MiterLimit.\n * @property {import(\"../colorlike.js\").ColorLike} strokeStyle StrokeStyle.\n */\n\n/**\n * @typedef {Object} TextState\n * @property {string} font Font.\n * @property {CanvasTextAlign} [textAlign] TextAlign.\n * @property {import(\"../style/Text.js\").TextJustify} [justify] Justify.\n * @property {CanvasTextBaseline} textBaseline TextBaseline.\n * @property {import(\"../style/Text.js\").TextPlacement} [placement] Placement.\n * @property {number} [maxAngle] MaxAngle.\n * @property {boolean} [overflow] Overflow.\n * @property {import(\"../style/Fill.js\").default} [backgroundFill] BackgroundFill.\n * @property {import(\"../style/Stroke.js\").default} [backgroundStroke] BackgroundStroke.\n * @property {import(\"../size.js\").Size} [scale] Scale.\n * @property {Array} [padding] Padding.\n */\n\n/**\n * @typedef {Object} SerializableInstructions\n * @property {Array<*>} instructions The rendering instructions.\n * @property {Array<*>} hitDetectionInstructions The rendering hit detection instructions.\n * @property {Array} coordinates The array of all coordinates.\n * @property {!Object} [textStates] The text states (decluttering).\n * @property {!Object} [fillStates] The fill states (decluttering).\n * @property {!Object} [strokeStates] The stroke states (decluttering).\n */\n\n/**\n * @typedef {Object} DeclutterImageWithText\n */\n\n/**\n * @const\n * @type {string}\n */\nexport const defaultFont = '10px sans-serif';\n\n/**\n * @const\n * @type {import(\"../colorlike.js\").ColorLike}\n */\nexport const defaultFillStyle = '#000';\n\n/**\n * @const\n * @type {CanvasLineCap}\n */\nexport const defaultLineCap = 'round';\n\n/**\n * @const\n * @type {Array}\n */\nexport const defaultLineDash = [];\n\n/**\n * @const\n * @type {number}\n */\nexport const defaultLineDashOffset = 0;\n\n/**\n * @const\n * @type {CanvasLineJoin}\n */\nexport const defaultLineJoin = 'round';\n\n/**\n * @const\n * @type {number}\n */\nexport const defaultMiterLimit = 10;\n\n/**\n * @const\n * @type {import(\"../colorlike.js\").ColorLike}\n */\nexport const defaultStrokeStyle = '#000';\n\n/**\n * @const\n * @type {CanvasTextAlign}\n */\nexport const defaultTextAlign = 'center';\n\n/**\n * @const\n * @type {CanvasTextBaseline}\n */\nexport const defaultTextBaseline = 'middle';\n\n/**\n * @const\n * @type {Array}\n */\nexport const defaultPadding = [0, 0, 0, 0];\n\n/**\n * @const\n * @type {number}\n */\nexport const defaultLineWidth = 1;\n\n/**\n * @type {BaseObject}\n */\nexport const checkedFonts = new BaseObject();\n\n/**\n * @type {CanvasRenderingContext2D}\n */\nlet measureContext = null;\n\n/**\n * @type {string}\n */\nlet measureFont;\n\n/**\n * @type {!Object}\n */\nexport const textHeights = {};\n\n/**\n * Clears the label cache when a font becomes available.\n * @param {string} fontSpec CSS font spec.\n */\nexport const registerFont = (function () {\n const retries = 100;\n const size = '32px ';\n const referenceFonts = ['monospace', 'serif'];\n const len = referenceFonts.length;\n const text = 'wmytzilWMYTZIL@#/&?$%10\\uF013';\n let interval, referenceWidth;\n\n /**\n * @param {string} fontStyle Css font-style\n * @param {string} fontWeight Css font-weight\n * @param {*} fontFamily Css font-family\n * @return {boolean} Font with style and weight is available\n */\n function isAvailable(fontStyle, fontWeight, fontFamily) {\n let available = true;\n for (let i = 0; i < len; ++i) {\n const referenceFont = referenceFonts[i];\n referenceWidth = measureTextWidth(\n fontStyle + ' ' + fontWeight + ' ' + size + referenceFont,\n text\n );\n if (fontFamily != referenceFont) {\n const width = measureTextWidth(\n fontStyle +\n ' ' +\n fontWeight +\n ' ' +\n size +\n fontFamily +\n ',' +\n referenceFont,\n text\n );\n // If width and referenceWidth are the same, then the fallback was used\n // instead of the font we wanted, so the font is not available.\n available = available && width != referenceWidth;\n }\n }\n if (available) {\n return true;\n }\n return false;\n }\n\n function check() {\n let done = true;\n const fonts = checkedFonts.getKeys();\n for (let i = 0, ii = fonts.length; i < ii; ++i) {\n const font = fonts[i];\n if (checkedFonts.get(font) < retries) {\n if (isAvailable.apply(this, font.split('\\n'))) {\n clear(textHeights);\n // Make sure that loaded fonts are picked up by Safari\n measureContext = null;\n measureFont = undefined;\n checkedFonts.set(font, retries);\n } else {\n checkedFonts.set(font, checkedFonts.get(font) + 1, true);\n done = false;\n }\n }\n }\n if (done) {\n clearInterval(interval);\n interval = undefined;\n }\n }\n\n return function (fontSpec) {\n const font = getFontParameters(fontSpec);\n if (!font) {\n return;\n }\n const families = font.families;\n for (let i = 0, ii = families.length; i < ii; ++i) {\n const family = families[i];\n const key = font.style + '\\n' + font.weight + '\\n' + family;\n if (checkedFonts.get(key) === undefined) {\n checkedFonts.set(key, retries, true);\n if (!isAvailable(font.style, font.weight, family)) {\n checkedFonts.set(key, 0, true);\n if (interval === undefined) {\n interval = setInterval(check, 32);\n }\n }\n }\n }\n };\n})();\n\n/**\n * @param {string} font Font to use for measuring.\n * @return {import(\"../size.js\").Size} Measurement.\n */\nexport const measureTextHeight = (function () {\n /**\n * @type {HTMLDivElement}\n */\n let measureElement;\n return function (fontSpec) {\n let height = textHeights[fontSpec];\n if (height == undefined) {\n if (WORKER_OFFSCREEN_CANVAS) {\n const font = getFontParameters(fontSpec);\n const metrics = measureText(fontSpec, 'Žg');\n const lineHeight = isNaN(Number(font.lineHeight))\n ? 1.2\n : Number(font.lineHeight);\n height =\n lineHeight *\n (metrics.actualBoundingBoxAscent + metrics.actualBoundingBoxDescent);\n } else {\n if (!measureElement) {\n measureElement = document.createElement('div');\n measureElement.innerHTML = 'M';\n measureElement.style.minHeight = '0';\n measureElement.style.maxHeight = 'none';\n measureElement.style.height = 'auto';\n measureElement.style.padding = '0';\n measureElement.style.border = 'none';\n measureElement.style.position = 'absolute';\n measureElement.style.display = 'block';\n measureElement.style.left = '-99999px';\n }\n measureElement.style.font = fontSpec;\n document.body.appendChild(measureElement);\n height = measureElement.offsetHeight;\n document.body.removeChild(measureElement);\n }\n textHeights[fontSpec] = height;\n }\n return height;\n };\n})();\n\n/**\n * @param {string} font Font.\n * @param {string} text Text.\n * @return {TextMetrics} Text metrics.\n */\nfunction measureText(font, text) {\n if (!measureContext) {\n measureContext = createCanvasContext2D(1, 1);\n }\n if (font != measureFont) {\n measureContext.font = font;\n measureFont = measureContext.font;\n }\n return measureContext.measureText(text);\n}\n\n/**\n * @param {string} font Font.\n * @param {string} text Text.\n * @return {number} Width.\n */\nexport function measureTextWidth(font, text) {\n return measureText(font, text).width;\n}\n\n/**\n * Measure text width using a cache.\n * @param {string} font The font.\n * @param {string} text The text to measure.\n * @param {Object} cache A lookup of cached widths by text.\n * @return {number} The text width.\n */\nexport function measureAndCacheTextWidth(font, text, cache) {\n if (text in cache) {\n return cache[text];\n }\n const width = text\n .split('\\n')\n .reduce((prev, curr) => Math.max(prev, measureTextWidth(font, curr)), 0);\n cache[text] = width;\n return width;\n}\n\n/**\n * @param {TextState} baseStyle Base style.\n * @param {Array} chunks Text chunks to measure.\n * @return {{width: number, height: number, widths: Array, heights: Array, lineWidths: Array}}} Text metrics.\n */\nexport function getTextDimensions(baseStyle, chunks) {\n const widths = [];\n const heights = [];\n const lineWidths = [];\n let width = 0;\n let lineWidth = 0;\n let height = 0;\n let lineHeight = 0;\n for (let i = 0, ii = chunks.length; i <= ii; i += 2) {\n const text = chunks[i];\n if (text === '\\n' || i === ii) {\n width = Math.max(width, lineWidth);\n lineWidths.push(lineWidth);\n lineWidth = 0;\n height += lineHeight;\n continue;\n }\n const font = chunks[i + 1] || baseStyle.font;\n const currentWidth = measureTextWidth(font, text);\n widths.push(currentWidth);\n lineWidth += currentWidth;\n const currentHeight = measureTextHeight(font);\n heights.push(currentHeight);\n lineHeight = Math.max(lineHeight, currentHeight);\n }\n return {width, height, widths, heights, lineWidths};\n}\n\n/**\n * @param {CanvasRenderingContext2D} context Context.\n * @param {number} rotation Rotation.\n * @param {number} offsetX X offset.\n * @param {number} offsetY Y offset.\n */\nexport function rotateAtOffset(context, rotation, offsetX, offsetY) {\n if (rotation !== 0) {\n context.translate(offsetX, offsetY);\n context.rotate(rotation);\n context.translate(-offsetX, -offsetY);\n }\n}\n\n/**\n * @param {CanvasRenderingContext2D} context Context.\n * @param {import(\"../transform.js\").Transform|null} transform Transform.\n * @param {number} opacity Opacity.\n * @param {Label|HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} labelOrImage Label.\n * @param {number} originX Origin X.\n * @param {number} originY Origin Y.\n * @param {number} w Width.\n * @param {number} h Height.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {import(\"../size.js\").Size} scale Scale.\n */\nexport function drawImageOrLabel(\n context,\n transform,\n opacity,\n labelOrImage,\n originX,\n originY,\n w,\n h,\n x,\n y,\n scale\n) {\n context.save();\n\n if (opacity !== 1) {\n context.globalAlpha *= opacity;\n }\n if (transform) {\n context.setTransform.apply(context, transform);\n }\n\n if (/** @type {*} */ (labelOrImage).contextInstructions) {\n // label\n context.translate(x, y);\n context.scale(scale[0], scale[1]);\n executeLabelInstructions(/** @type {Label} */ (labelOrImage), context);\n } else if (scale[0] < 0 || scale[1] < 0) {\n // flipped image\n context.translate(x, y);\n context.scale(scale[0], scale[1]);\n context.drawImage(\n /** @type {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} */ (\n labelOrImage\n ),\n originX,\n originY,\n w,\n h,\n 0,\n 0,\n w,\n h\n );\n } else {\n // if image not flipped translate and scale can be avoided\n context.drawImage(\n /** @type {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} */ (\n labelOrImage\n ),\n originX,\n originY,\n w,\n h,\n x,\n y,\n w * scale[0],\n h * scale[1]\n );\n }\n\n context.restore();\n}\n\n/**\n * @param {Label} label Label.\n * @param {CanvasRenderingContext2D} context Context.\n */\nfunction executeLabelInstructions(label, context) {\n const contextInstructions = label.contextInstructions;\n for (let i = 0, ii = contextInstructions.length; i < ii; i += 2) {\n if (Array.isArray(contextInstructions[i + 1])) {\n context[contextInstructions[i]].apply(\n context,\n contextInstructions[i + 1]\n );\n } else {\n context[contextInstructions[i]] = contextInstructions[i + 1];\n }\n }\n}\n","/**\n * @module ol/renderer/Composite\n */\nimport MapRenderer from './Map.js';\nimport ObjectEventType from '../ObjectEventType.js';\nimport RenderEvent from '../render/Event.js';\nimport RenderEventType from '../render/EventType.js';\nimport {CLASS_UNSELECTABLE} from '../css.js';\nimport {checkedFonts} from '../render/canvas.js';\nimport {inView} from '../layer/Layer.js';\nimport {listen, unlistenByKey} from '../events.js';\nimport {replaceChildren} from '../dom.js';\n\n/**\n * @classdesc\n * Canvas map renderer.\n * @api\n */\nclass CompositeMapRenderer extends MapRenderer {\n /**\n * @param {import(\"../Map.js\").default} map Map.\n */\n constructor(map) {\n super(map);\n\n /**\n * @type {import(\"../events.js\").EventsKey}\n */\n this.fontChangeListenerKey_ = listen(\n checkedFonts,\n ObjectEventType.PROPERTYCHANGE,\n map.redrawText.bind(map)\n );\n\n /**\n * @private\n * @type {HTMLDivElement}\n */\n this.element_ = document.createElement('div');\n const style = this.element_.style;\n style.position = 'absolute';\n style.width = '100%';\n style.height = '100%';\n style.zIndex = '0';\n\n this.element_.className = CLASS_UNSELECTABLE + ' ol-layers';\n\n const container = map.getViewport();\n container.insertBefore(this.element_, container.firstChild || null);\n\n /**\n * @private\n * @type {Array}\n */\n this.children_ = [];\n\n /**\n * @private\n * @type {boolean}\n */\n this.renderedVisible_ = true;\n }\n\n /**\n * @param {import(\"../render/EventType.js\").default} type Event type.\n * @param {import(\"../Map.js\").FrameState} frameState Frame state.\n */\n dispatchRenderEvent(type, frameState) {\n const map = this.getMap();\n if (map.hasListener(type)) {\n const event = new RenderEvent(type, undefined, frameState);\n map.dispatchEvent(event);\n }\n }\n\n disposeInternal() {\n unlistenByKey(this.fontChangeListenerKey_);\n this.element_.parentNode.removeChild(this.element_);\n super.disposeInternal();\n }\n\n /**\n * Render.\n * @param {?import(\"../Map.js\").FrameState} frameState Frame state.\n */\n renderFrame(frameState) {\n if (!frameState) {\n if (this.renderedVisible_) {\n this.element_.style.display = 'none';\n this.renderedVisible_ = false;\n }\n return;\n }\n\n this.calculateMatrices2D(frameState);\n this.dispatchRenderEvent(RenderEventType.PRECOMPOSE, frameState);\n\n const layerStatesArray = frameState.layerStatesArray.sort(function (a, b) {\n return a.zIndex - b.zIndex;\n });\n const viewState = frameState.viewState;\n\n this.children_.length = 0;\n /**\n * @type {Array}\n */\n const declutterLayers = [];\n let previousElement = null;\n for (let i = 0, ii = layerStatesArray.length; i < ii; ++i) {\n const layerState = layerStatesArray[i];\n frameState.layerIndex = i;\n\n const layer = layerState.layer;\n const sourceState = layer.getSourceState();\n if (\n !inView(layerState, viewState) ||\n (sourceState != 'ready' && sourceState != 'undefined')\n ) {\n layer.unrender();\n continue;\n }\n\n const element = layer.render(frameState, previousElement);\n if (!element) {\n continue;\n }\n if (element !== previousElement) {\n this.children_.push(element);\n previousElement = element;\n }\n if ('getDeclutter' in layer) {\n declutterLayers.push(\n /** @type {import(\"../layer/BaseVector.js\").default} */ (layer)\n );\n }\n }\n for (let i = declutterLayers.length - 1; i >= 0; --i) {\n declutterLayers[i].renderDeclutter(frameState);\n }\n\n replaceChildren(this.element_, this.children_);\n\n this.dispatchRenderEvent(RenderEventType.POSTCOMPOSE, frameState);\n\n if (!this.renderedVisible_) {\n this.element_.style.display = '';\n this.renderedVisible_ = true;\n }\n\n this.scheduleExpireIconCache(frameState);\n }\n}\n\nexport default CompositeMapRenderer;\n","/**\n * @module ol/layer/Group\n */\nimport BaseLayer from './Base.js';\nimport Collection from '../Collection.js';\nimport CollectionEventType from '../CollectionEventType.js';\nimport Event from '../events/Event.js';\nimport EventType from '../events/EventType.js';\nimport ObjectEventType from '../ObjectEventType.js';\nimport {assert} from '../asserts.js';\nimport {clear} from '../obj.js';\nimport {getIntersection} from '../extent.js';\nimport {getUid} from '../util.js';\nimport {listen, unlistenByKey} from '../events.js';\n\n/**\n * @typedef {'addlayer'|'removelayer'} EventType\n */\n\n/**\n * @classdesc\n * A layer group triggers 'addlayer' and 'removelayer' events when layers are added to or removed from\n * the group or one of its child groups. When a layer group is added to or removed from another layer group,\n * a single event will be triggered (instead of one per layer in the group added or removed).\n */\nexport class GroupEvent extends Event {\n /**\n * @param {EventType} type The event type.\n * @param {BaseLayer} layer The layer.\n */\n constructor(type, layer) {\n super(type);\n\n /**\n * The added or removed layer.\n * @type {BaseLayer}\n * @api\n */\n this.layer = layer;\n }\n}\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature &\n * import(\"../Observable\").OnSignature &\n * import(\"../Observable\").CombinedOnSignature} GroupOnSignature\n */\n\n/**\n * @typedef {Object} Options\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {import(\"../extent.js\").Extent} [extent] The bounding extent for layer rendering. The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex] The z-index for layer rendering. At rendering time, the layers\n * will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed\n * for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`\n * method was used.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {number} [minZoom] The minimum view zoom level (exclusive) above which this layer will be\n * visible.\n * @property {number} [maxZoom] The maximum view zoom level (inclusive) at which this layer will\n * be visible.\n * @property {Array|Collection} [layers] Child layers.\n * @property {Object} [properties] Arbitrary observable properties. Can be accessed with `#get()` and `#set()`.\n */\n\n/**\n * @enum {string}\n * @private\n */\nconst Property = {\n LAYERS: 'layers',\n};\n\n/**\n * @classdesc\n * A {@link module:ol/Collection~Collection} of layers that are handled together.\n *\n * A generic `change` event is triggered when the group/Collection changes.\n *\n * @api\n */\nclass LayerGroup extends BaseLayer {\n /**\n * @param {Options} [options] Layer options.\n */\n constructor(options) {\n options = options || {};\n const baseOptions = /** @type {Options} */ (Object.assign({}, options));\n delete baseOptions.layers;\n\n let layers = options.layers;\n\n super(baseOptions);\n\n /***\n * @type {GroupOnSignature}\n */\n this.on;\n\n /***\n * @type {GroupOnSignature}\n */\n this.once;\n\n /***\n * @type {GroupOnSignature}\n */\n this.un;\n\n /**\n * @private\n * @type {Array}\n */\n this.layersListenerKeys_ = [];\n\n /**\n * @private\n * @type {Object>}\n */\n this.listenerKeys_ = {};\n\n this.addChangeListener(Property.LAYERS, this.handleLayersChanged_);\n\n if (layers) {\n if (Array.isArray(layers)) {\n layers = new Collection(layers.slice(), {unique: true});\n } else {\n assert(typeof (/** @type {?} */ (layers).getArray) === 'function', 43); // Expected `layers` to be an array or a `Collection`\n }\n } else {\n layers = new Collection(undefined, {unique: true});\n }\n\n this.setLayers(layers);\n }\n\n /**\n * @private\n */\n handleLayerChange_() {\n this.changed();\n }\n\n /**\n * @private\n */\n handleLayersChanged_() {\n this.layersListenerKeys_.forEach(unlistenByKey);\n this.layersListenerKeys_.length = 0;\n\n const layers = this.getLayers();\n this.layersListenerKeys_.push(\n listen(layers, CollectionEventType.ADD, this.handleLayersAdd_, this),\n listen(layers, CollectionEventType.REMOVE, this.handleLayersRemove_, this)\n );\n\n for (const id in this.listenerKeys_) {\n this.listenerKeys_[id].forEach(unlistenByKey);\n }\n clear(this.listenerKeys_);\n\n const layersArray = layers.getArray();\n for (let i = 0, ii = layersArray.length; i < ii; i++) {\n const layer = layersArray[i];\n this.registerLayerListeners_(layer);\n this.dispatchEvent(new GroupEvent('addlayer', layer));\n }\n this.changed();\n }\n\n /**\n * @param {BaseLayer} layer The layer.\n */\n registerLayerListeners_(layer) {\n const listenerKeys = [\n listen(\n layer,\n ObjectEventType.PROPERTYCHANGE,\n this.handleLayerChange_,\n this\n ),\n listen(layer, EventType.CHANGE, this.handleLayerChange_, this),\n ];\n\n if (layer instanceof LayerGroup) {\n listenerKeys.push(\n listen(layer, 'addlayer', this.handleLayerGroupAdd_, this),\n listen(layer, 'removelayer', this.handleLayerGroupRemove_, this)\n );\n }\n\n this.listenerKeys_[getUid(layer)] = listenerKeys;\n }\n\n /**\n * @param {GroupEvent} event The layer group event.\n */\n handleLayerGroupAdd_(event) {\n this.dispatchEvent(new GroupEvent('addlayer', event.layer));\n }\n\n /**\n * @param {GroupEvent} event The layer group event.\n */\n handleLayerGroupRemove_(event) {\n this.dispatchEvent(new GroupEvent('removelayer', event.layer));\n }\n\n /**\n * @param {import(\"../Collection.js\").CollectionEvent} collectionEvent CollectionEvent.\n * @private\n */\n handleLayersAdd_(collectionEvent) {\n const layer = collectionEvent.element;\n this.registerLayerListeners_(layer);\n this.dispatchEvent(new GroupEvent('addlayer', layer));\n this.changed();\n }\n\n /**\n * @param {import(\"../Collection.js\").CollectionEvent} collectionEvent CollectionEvent.\n * @private\n */\n handleLayersRemove_(collectionEvent) {\n const layer = collectionEvent.element;\n const key = getUid(layer);\n this.listenerKeys_[key].forEach(unlistenByKey);\n delete this.listenerKeys_[key];\n this.dispatchEvent(new GroupEvent('removelayer', layer));\n this.changed();\n }\n\n /**\n * Returns the {@link module:ol/Collection~Collection collection} of {@link module:ol/layer/Layer~Layer layers}\n * in this group.\n * @return {!Collection} Collection of\n * {@link module:ol/layer/Base~BaseLayer layers} that are part of this group.\n * @observable\n * @api\n */\n getLayers() {\n return /** @type {!Collection} */ (\n this.get(Property.LAYERS)\n );\n }\n\n /**\n * Set the {@link module:ol/Collection~Collection collection} of {@link module:ol/layer/Layer~Layer layers}\n * in this group.\n * @param {!Collection} layers Collection of\n * {@link module:ol/layer/Base~BaseLayer layers} that are part of this group.\n * @observable\n * @api\n */\n setLayers(layers) {\n const collection = this.getLayers();\n if (collection) {\n const currentLayers = collection.getArray();\n for (let i = 0, ii = currentLayers.length; i < ii; ++i) {\n this.dispatchEvent(new GroupEvent('removelayer', currentLayers[i]));\n }\n }\n\n this.set(Property.LAYERS, layers);\n }\n\n /**\n * @param {Array} [array] Array of layers (to be modified in place).\n * @return {Array} Array of layers.\n */\n getLayersArray(array) {\n array = array !== undefined ? array : [];\n this.getLayers().forEach(function (layer) {\n layer.getLayersArray(array);\n });\n return array;\n }\n\n /**\n * Get the layer states list and use this groups z-index as the default\n * for all layers in this and nested groups, if it is unset at this point.\n * If dest is not provided and this group's z-index is undefined\n * 0 is used a the default z-index.\n * @param {Array} [dest] Optional list\n * of layer states (to be modified in place).\n * @return {Array} List of layer states.\n */\n getLayerStatesArray(dest) {\n const states = dest !== undefined ? dest : [];\n const pos = states.length;\n\n this.getLayers().forEach(function (layer) {\n layer.getLayerStatesArray(states);\n });\n\n const ownLayerState = this.getLayerState();\n let defaultZIndex = ownLayerState.zIndex;\n if (!dest && ownLayerState.zIndex === undefined) {\n defaultZIndex = 0;\n }\n for (let i = pos, ii = states.length; i < ii; i++) {\n const layerState = states[i];\n layerState.opacity *= ownLayerState.opacity;\n layerState.visible = layerState.visible && ownLayerState.visible;\n layerState.maxResolution = Math.min(\n layerState.maxResolution,\n ownLayerState.maxResolution\n );\n layerState.minResolution = Math.max(\n layerState.minResolution,\n ownLayerState.minResolution\n );\n layerState.minZoom = Math.max(layerState.minZoom, ownLayerState.minZoom);\n layerState.maxZoom = Math.min(layerState.maxZoom, ownLayerState.maxZoom);\n if (ownLayerState.extent !== undefined) {\n if (layerState.extent !== undefined) {\n layerState.extent = getIntersection(\n layerState.extent,\n ownLayerState.extent\n );\n } else {\n layerState.extent = ownLayerState.extent;\n }\n }\n if (layerState.zIndex === undefined) {\n layerState.zIndex = defaultZIndex;\n }\n }\n\n return states;\n }\n\n /**\n * @return {import(\"../source/Source.js\").State} Source state.\n */\n getSourceState() {\n return 'ready';\n }\n}\n\nexport default LayerGroup;\n","/**\n * @module ol/MapEvent\n */\nimport Event from './events/Event.js';\n\n/**\n * @classdesc\n * Events emitted as map events are instances of this type.\n * See {@link module:ol/Map~Map} for which events trigger a map event.\n */\nclass MapEvent extends Event {\n /**\n * @param {string} type Event type.\n * @param {import(\"./Map.js\").default} map Map.\n * @param {?import(\"./Map.js\").FrameState} [frameState] Frame state.\n */\n constructor(type, map, frameState) {\n super(type);\n\n /**\n * The map where the event occurred.\n * @type {import(\"./Map.js\").default}\n * @api\n */\n this.map = map;\n\n /**\n * The frame state at the time of the event.\n * @type {?import(\"./Map.js\").FrameState}\n * @api\n */\n this.frameState = frameState !== undefined ? frameState : null;\n }\n}\n\nexport default MapEvent;\n","/**\n * @module ol/MapBrowserEvent\n */\nimport MapEvent from './MapEvent.js';\n\n/**\n * @classdesc\n * Events emitted as map browser events are instances of this type.\n * See {@link module:ol/Map~Map} for which events trigger a map browser event.\n * @template {UIEvent} EVENT\n */\nclass MapBrowserEvent extends MapEvent {\n /**\n * @param {string} type Event type.\n * @param {import(\"./Map.js\").default} map Map.\n * @param {EVENT} originalEvent Original event.\n * @param {boolean} [dragging] Is the map currently being dragged?\n * @param {import(\"./Map.js\").FrameState} [frameState] Frame state.\n * @param {Array} [activePointers] Active pointers.\n */\n constructor(type, map, originalEvent, dragging, frameState, activePointers) {\n super(type, map, frameState);\n\n /**\n * The original browser event.\n * @const\n * @type {EVENT}\n * @api\n */\n this.originalEvent = originalEvent;\n\n /**\n * The map pixel relative to the viewport corresponding to the original browser event.\n * @type {?import(\"./pixel.js\").Pixel}\n */\n this.pixel_ = null;\n\n /**\n * The coordinate in the user projection corresponding to the original browser event.\n * @type {?import(\"./coordinate.js\").Coordinate}\n */\n this.coordinate_ = null;\n\n /**\n * Indicates if the map is currently being dragged. Only set for\n * `POINTERDRAG` and `POINTERMOVE` events. Default is `false`.\n *\n * @type {boolean}\n * @api\n */\n this.dragging = dragging !== undefined ? dragging : false;\n\n /**\n * @type {Array|undefined}\n */\n this.activePointers = activePointers;\n }\n\n /**\n * The map pixel relative to the viewport corresponding to the original event.\n * @type {import(\"./pixel.js\").Pixel}\n * @api\n */\n get pixel() {\n if (!this.pixel_) {\n this.pixel_ = this.map.getEventPixel(this.originalEvent);\n }\n return this.pixel_;\n }\n set pixel(pixel) {\n this.pixel_ = pixel;\n }\n\n /**\n * The coordinate corresponding to the original browser event. This will be in the user\n * projection if one is set. Otherwise it will be in the view projection.\n * @type {import(\"./coordinate.js\").Coordinate}\n * @api\n */\n get coordinate() {\n if (!this.coordinate_) {\n this.coordinate_ = this.map.getCoordinateFromPixel(this.pixel);\n }\n return this.coordinate_;\n }\n set coordinate(coordinate) {\n this.coordinate_ = coordinate;\n }\n\n /**\n * Prevents the default browser action.\n * See https://developer.mozilla.org/en-US/docs/Web/API/event.preventDefault.\n * @api\n */\n preventDefault() {\n super.preventDefault();\n if ('preventDefault' in this.originalEvent) {\n /** @type {UIEvent} */ (this.originalEvent).preventDefault();\n }\n }\n\n /**\n * Prevents further propagation of the current event.\n * See https://developer.mozilla.org/en-US/docs/Web/API/event.stopPropagation.\n * @api\n */\n stopPropagation() {\n super.stopPropagation();\n if ('stopPropagation' in this.originalEvent) {\n /** @type {UIEvent} */ (this.originalEvent).stopPropagation();\n }\n }\n}\n\nexport default MapBrowserEvent;\n","/**\n * @module ol/MapBrowserEventType\n */\nimport EventType from './events/EventType.js';\n\n/**\n * Constants for event names.\n * @enum {string}\n */\nexport default {\n /**\n * A true single click with no dragging and no double click. Note that this\n * event is delayed by 250 ms to ensure that it is not a double click.\n * @event module:ol/MapBrowserEvent~MapBrowserEvent#singleclick\n * @api\n */\n SINGLECLICK: 'singleclick',\n\n /**\n * A click with no dragging. A double click will fire two of this.\n * @event module:ol/MapBrowserEvent~MapBrowserEvent#click\n * @api\n */\n CLICK: EventType.CLICK,\n\n /**\n * A true double click, with no dragging.\n * @event module:ol/MapBrowserEvent~MapBrowserEvent#dblclick\n * @api\n */\n DBLCLICK: EventType.DBLCLICK,\n\n /**\n * Triggered when a pointer is dragged.\n * @event module:ol/MapBrowserEvent~MapBrowserEvent#pointerdrag\n * @api\n */\n POINTERDRAG: 'pointerdrag',\n\n /**\n * Triggered when a pointer is moved. Note that on touch devices this is\n * triggered when the map is panned, so is not the same as mousemove.\n * @event module:ol/MapBrowserEvent~MapBrowserEvent#pointermove\n * @api\n */\n POINTERMOVE: 'pointermove',\n\n POINTERDOWN: 'pointerdown',\n POINTERUP: 'pointerup',\n POINTEROVER: 'pointerover',\n POINTEROUT: 'pointerout',\n POINTERENTER: 'pointerenter',\n POINTERLEAVE: 'pointerleave',\n POINTERCANCEL: 'pointercancel',\n};\n\n/***\n * @typedef {'singleclick'|'click'|'dblclick'|'pointerdrag'|'pointermove'} Types\n */\n","/**\n * @module ol/pointer/EventType\n */\n\n/**\n * Constants for event names.\n * @enum {string}\n */\nexport default {\n POINTERMOVE: 'pointermove',\n POINTERDOWN: 'pointerdown',\n POINTERUP: 'pointerup',\n POINTEROVER: 'pointerover',\n POINTEROUT: 'pointerout',\n POINTERENTER: 'pointerenter',\n POINTERLEAVE: 'pointerleave',\n POINTERCANCEL: 'pointercancel',\n};\n","/**\n * @module ol/MapBrowserEventHandler\n */\n\nimport EventType from './events/EventType.js';\nimport MapBrowserEvent from './MapBrowserEvent.js';\nimport MapBrowserEventType from './MapBrowserEventType.js';\nimport PointerEventType from './pointer/EventType.js';\nimport Target from './events/Target.js';\nimport {PASSIVE_EVENT_LISTENERS} from './has.js';\nimport {VOID} from './functions.js';\nimport {listen, unlistenByKey} from './events.js';\n\nclass MapBrowserEventHandler extends Target {\n /**\n * @param {import(\"./Map.js\").default} map The map with the viewport to listen to events on.\n * @param {number} [moveTolerance] The minimal distance the pointer must travel to trigger a move.\n */\n constructor(map, moveTolerance) {\n super(map);\n\n /**\n * This is the element that we will listen to the real events on.\n * @type {import(\"./Map.js\").default}\n * @private\n */\n this.map_ = map;\n\n /**\n * @type {any}\n * @private\n */\n this.clickTimeoutId_;\n\n /**\n * Emulate dblclick and singleclick. Will be true when only one pointer is active.\n * @type {boolean}\n */\n this.emulateClicks_ = false;\n\n /**\n * @type {boolean}\n * @private\n */\n this.dragging_ = false;\n\n /**\n * @type {!Array}\n * @private\n */\n this.dragListenerKeys_ = [];\n\n /**\n * @type {number}\n * @private\n */\n this.moveTolerance_ = moveTolerance === undefined ? 1 : moveTolerance;\n\n /**\n * The most recent \"down\" type event (or null if none have occurred).\n * Set on pointerdown.\n * @type {PointerEvent|null}\n * @private\n */\n this.down_ = null;\n\n const element = this.map_.getViewport();\n\n /**\n * @type {Array}\n * @private\n */\n this.activePointers_ = [];\n\n /**\n * @type {!Object}\n * @private\n */\n this.trackedTouches_ = {};\n\n this.element_ = element;\n\n /**\n * @type {?import(\"./events.js\").EventsKey}\n * @private\n */\n this.pointerdownListenerKey_ = listen(\n element,\n PointerEventType.POINTERDOWN,\n this.handlePointerDown_,\n this\n );\n\n /**\n * @type {PointerEvent}\n * @private\n */\n this.originalPointerMoveEvent_;\n\n /**\n * @type {?import(\"./events.js\").EventsKey}\n * @private\n */\n this.relayedListenerKey_ = listen(\n element,\n PointerEventType.POINTERMOVE,\n this.relayMoveEvent_,\n this\n );\n\n /**\n * @private\n */\n this.boundHandleTouchMove_ = this.handleTouchMove_.bind(this);\n\n this.element_.addEventListener(\n EventType.TOUCHMOVE,\n this.boundHandleTouchMove_,\n PASSIVE_EVENT_LISTENERS ? {passive: false} : false\n );\n }\n\n /**\n * @param {PointerEvent} pointerEvent Pointer\n * event.\n * @private\n */\n emulateClick_(pointerEvent) {\n let newEvent = new MapBrowserEvent(\n MapBrowserEventType.CLICK,\n this.map_,\n pointerEvent\n );\n this.dispatchEvent(newEvent);\n if (this.clickTimeoutId_ !== undefined) {\n // double-click\n clearTimeout(this.clickTimeoutId_);\n this.clickTimeoutId_ = undefined;\n newEvent = new MapBrowserEvent(\n MapBrowserEventType.DBLCLICK,\n this.map_,\n pointerEvent\n );\n this.dispatchEvent(newEvent);\n } else {\n // click\n this.clickTimeoutId_ = setTimeout(() => {\n this.clickTimeoutId_ = undefined;\n const newEvent = new MapBrowserEvent(\n MapBrowserEventType.SINGLECLICK,\n this.map_,\n pointerEvent\n );\n this.dispatchEvent(newEvent);\n }, 250);\n }\n }\n\n /**\n * Keeps track on how many pointers are currently active.\n *\n * @param {PointerEvent} pointerEvent Pointer\n * event.\n * @private\n */\n updateActivePointers_(pointerEvent) {\n const event = pointerEvent;\n const id = event.pointerId;\n\n if (\n event.type == MapBrowserEventType.POINTERUP ||\n event.type == MapBrowserEventType.POINTERCANCEL\n ) {\n delete this.trackedTouches_[id];\n for (const pointerId in this.trackedTouches_) {\n if (this.trackedTouches_[pointerId].target !== event.target) {\n // Some platforms assign a new pointerId when the target changes.\n // If this happens, delete one tracked pointer. If there is more\n // than one tracked pointer for the old target, it will be cleared\n // by subsequent POINTERUP events from other pointers.\n delete this.trackedTouches_[pointerId];\n break;\n }\n }\n } else if (\n event.type == MapBrowserEventType.POINTERDOWN ||\n event.type == MapBrowserEventType.POINTERMOVE\n ) {\n this.trackedTouches_[id] = event;\n }\n this.activePointers_ = Object.values(this.trackedTouches_);\n }\n\n /**\n * @param {PointerEvent} pointerEvent Pointer\n * event.\n * @private\n */\n handlePointerUp_(pointerEvent) {\n this.updateActivePointers_(pointerEvent);\n const newEvent = new MapBrowserEvent(\n MapBrowserEventType.POINTERUP,\n this.map_,\n pointerEvent,\n undefined,\n undefined,\n this.activePointers_\n );\n this.dispatchEvent(newEvent);\n\n // We emulate click events on left mouse button click, touch contact, and pen\n // contact. isMouseActionButton returns true in these cases (evt.button is set\n // to 0).\n // See http://www.w3.org/TR/pointerevents/#button-states\n // We only fire click, singleclick, and doubleclick if nobody has called\n // event.preventDefault().\n if (\n this.emulateClicks_ &&\n !newEvent.defaultPrevented &&\n !this.dragging_ &&\n this.isMouseActionButton_(pointerEvent)\n ) {\n this.emulateClick_(this.down_);\n }\n\n if (this.activePointers_.length === 0) {\n this.dragListenerKeys_.forEach(unlistenByKey);\n this.dragListenerKeys_.length = 0;\n this.dragging_ = false;\n this.down_ = null;\n }\n }\n\n /**\n * @param {PointerEvent} pointerEvent Pointer\n * event.\n * @return {boolean} If the left mouse button was pressed.\n * @private\n */\n isMouseActionButton_(pointerEvent) {\n return pointerEvent.button === 0;\n }\n\n /**\n * @param {PointerEvent} pointerEvent Pointer\n * event.\n * @private\n */\n handlePointerDown_(pointerEvent) {\n this.emulateClicks_ = this.activePointers_.length === 0;\n this.updateActivePointers_(pointerEvent);\n const newEvent = new MapBrowserEvent(\n MapBrowserEventType.POINTERDOWN,\n this.map_,\n pointerEvent,\n undefined,\n undefined,\n this.activePointers_\n );\n this.dispatchEvent(newEvent);\n\n // Store a copy of the down event\n this.down_ = /** @type {PointerEvent} */ ({});\n for (const property in pointerEvent) {\n const value = pointerEvent[property];\n this.down_[property] = typeof value === 'function' ? VOID : value;\n }\n\n if (this.dragListenerKeys_.length === 0) {\n const doc = this.map_.getOwnerDocument();\n this.dragListenerKeys_.push(\n listen(\n doc,\n MapBrowserEventType.POINTERMOVE,\n this.handlePointerMove_,\n this\n ),\n listen(doc, MapBrowserEventType.POINTERUP, this.handlePointerUp_, this),\n /* Note that the listener for `pointercancel is set up on\n * `pointerEventHandler_` and not `documentPointerEventHandler_` like\n * the `pointerup` and `pointermove` listeners.\n *\n * The reason for this is the following: `TouchSource.vacuumTouches_()`\n * issues `pointercancel` events, when there was no `touchend` for a\n * `touchstart`. Now, let's say a first `touchstart` is registered on\n * `pointerEventHandler_`. The `documentPointerEventHandler_` is set up.\n * But `documentPointerEventHandler_` doesn't know about the first\n * `touchstart`. If there is no `touchend` for the `touchstart`, we can\n * only receive a `touchcancel` from `pointerEventHandler_`, because it is\n * only registered there.\n */\n listen(\n this.element_,\n MapBrowserEventType.POINTERCANCEL,\n this.handlePointerUp_,\n this\n )\n );\n if (this.element_.getRootNode && this.element_.getRootNode() !== doc) {\n this.dragListenerKeys_.push(\n listen(\n this.element_.getRootNode(),\n MapBrowserEventType.POINTERUP,\n this.handlePointerUp_,\n this\n )\n );\n }\n }\n }\n\n /**\n * @param {PointerEvent} pointerEvent Pointer\n * event.\n * @private\n */\n handlePointerMove_(pointerEvent) {\n // Between pointerdown and pointerup, pointermove events are triggered.\n // To avoid a 'false' touchmove event to be dispatched, we test if the pointer\n // moved a significant distance.\n if (this.isMoving_(pointerEvent)) {\n this.updateActivePointers_(pointerEvent);\n this.dragging_ = true;\n const newEvent = new MapBrowserEvent(\n MapBrowserEventType.POINTERDRAG,\n this.map_,\n pointerEvent,\n this.dragging_,\n undefined,\n this.activePointers_\n );\n this.dispatchEvent(newEvent);\n }\n }\n\n /**\n * Wrap and relay a pointermove event.\n * @param {PointerEvent} pointerEvent Pointer\n * event.\n * @private\n */\n relayMoveEvent_(pointerEvent) {\n this.originalPointerMoveEvent_ = pointerEvent;\n const dragging = !!(this.down_ && this.isMoving_(pointerEvent));\n this.dispatchEvent(\n new MapBrowserEvent(\n MapBrowserEventType.POINTERMOVE,\n this.map_,\n pointerEvent,\n dragging\n )\n );\n }\n\n /**\n * Flexible handling of a `touch-action: none` css equivalent: because calling\n * `preventDefault()` on a `pointermove` event does not stop native page scrolling\n * and zooming, we also listen for `touchmove` and call `preventDefault()` on it\n * when an interaction (currently `DragPan` handles the event.\n * @param {TouchEvent} event Event.\n * @private\n */\n handleTouchMove_(event) {\n // Due to https://github.com/mpizenberg/elm-pep/issues/2, `this.originalPointerMoveEvent_`\n // may not be initialized yet when we get here on a platform without native pointer events.\n const originalEvent = this.originalPointerMoveEvent_;\n if (\n (!originalEvent || originalEvent.defaultPrevented) &&\n (typeof event.cancelable !== 'boolean' || event.cancelable === true)\n ) {\n event.preventDefault();\n }\n }\n\n /**\n * @param {PointerEvent} pointerEvent Pointer\n * event.\n * @return {boolean} Is moving.\n * @private\n */\n isMoving_(pointerEvent) {\n return (\n this.dragging_ ||\n Math.abs(pointerEvent.clientX - this.down_.clientX) >\n this.moveTolerance_ ||\n Math.abs(pointerEvent.clientY - this.down_.clientY) > this.moveTolerance_\n );\n }\n\n /**\n * Clean up.\n */\n disposeInternal() {\n if (this.relayedListenerKey_) {\n unlistenByKey(this.relayedListenerKey_);\n this.relayedListenerKey_ = null;\n }\n this.element_.removeEventListener(\n EventType.TOUCHMOVE,\n this.boundHandleTouchMove_\n );\n\n if (this.pointerdownListenerKey_) {\n unlistenByKey(this.pointerdownListenerKey_);\n this.pointerdownListenerKey_ = null;\n }\n\n this.dragListenerKeys_.forEach(unlistenByKey);\n this.dragListenerKeys_.length = 0;\n\n this.element_ = null;\n super.disposeInternal();\n }\n}\n\nexport default MapBrowserEventHandler;\n","/**\n * @module ol/MapEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n /**\n * Triggered after a map frame is rendered.\n * @event module:ol/MapEvent~MapEvent#postrender\n * @api\n */\n POSTRENDER: 'postrender',\n\n /**\n * Triggered when the map starts moving.\n * @event module:ol/MapEvent~MapEvent#movestart\n * @api\n */\n MOVESTART: 'movestart',\n\n /**\n * Triggered after the map is moved.\n * @event module:ol/MapEvent~MapEvent#moveend\n * @api\n */\n MOVEEND: 'moveend',\n\n /**\n * Triggered when loading of additional map data (tiles, images, features) starts.\n * @event module:ol/MapEvent~MapEvent#loadstart\n * @api\n */\n LOADSTART: 'loadstart',\n\n /**\n * Triggered when loading of additional map data has completed.\n * @event module:ol/MapEvent~MapEvent#loadend\n * @api\n */\n LOADEND: 'loadend',\n};\n\n/***\n * @typedef {'postrender'|'movestart'|'moveend'|'loadstart'|'loadend'} Types\n */\n","/**\n * @module ol/MapProperty\n */\n\n/**\n * @enum {string}\n */\nexport default {\n LAYERGROUP: 'layergroup',\n SIZE: 'size',\n TARGET: 'target',\n VIEW: 'view',\n};\n","/**\n * @module ol/structs/PriorityQueue\n */\nimport {assert} from '../asserts.js';\nimport {clear} from '../obj.js';\n\n/**\n * @type {number}\n */\nexport const DROP = Infinity;\n\n/**\n * @classdesc\n * Priority queue.\n *\n * The implementation is inspired from the Closure Library's Heap class and\n * Python's heapq module.\n *\n * See https://github.com/google/closure-library/blob/master/closure/goog/structs/heap.js\n * and https://hg.python.org/cpython/file/2.7/Lib/heapq.py.\n *\n * @template T\n */\nclass PriorityQueue {\n /**\n * @param {function(T): number} priorityFunction Priority function.\n * @param {function(T): string} keyFunction Key function.\n */\n constructor(priorityFunction, keyFunction) {\n /**\n * @type {function(T): number}\n * @private\n */\n this.priorityFunction_ = priorityFunction;\n\n /**\n * @type {function(T): string}\n * @private\n */\n this.keyFunction_ = keyFunction;\n\n /**\n * @type {Array}\n * @private\n */\n this.elements_ = [];\n\n /**\n * @type {Array}\n * @private\n */\n this.priorities_ = [];\n\n /**\n * @type {!Object}\n * @private\n */\n this.queuedElements_ = {};\n }\n\n /**\n * FIXME empty description for jsdoc\n */\n clear() {\n this.elements_.length = 0;\n this.priorities_.length = 0;\n clear(this.queuedElements_);\n }\n\n /**\n * Remove and return the highest-priority element. O(log N).\n * @return {T} Element.\n */\n dequeue() {\n const elements = this.elements_;\n const priorities = this.priorities_;\n const element = elements[0];\n if (elements.length == 1) {\n elements.length = 0;\n priorities.length = 0;\n } else {\n elements[0] = elements.pop();\n priorities[0] = priorities.pop();\n this.siftUp_(0);\n }\n const elementKey = this.keyFunction_(element);\n delete this.queuedElements_[elementKey];\n return element;\n }\n\n /**\n * Enqueue an element. O(log N).\n * @param {T} element Element.\n * @return {boolean} The element was added to the queue.\n */\n enqueue(element) {\n assert(!(this.keyFunction_(element) in this.queuedElements_), 31); // Tried to enqueue an `element` that was already added to the queue\n const priority = this.priorityFunction_(element);\n if (priority != DROP) {\n this.elements_.push(element);\n this.priorities_.push(priority);\n this.queuedElements_[this.keyFunction_(element)] = true;\n this.siftDown_(0, this.elements_.length - 1);\n return true;\n }\n return false;\n }\n\n /**\n * @return {number} Count.\n */\n getCount() {\n return this.elements_.length;\n }\n\n /**\n * Gets the index of the left child of the node at the given index.\n * @param {number} index The index of the node to get the left child for.\n * @return {number} The index of the left child.\n * @private\n */\n getLeftChildIndex_(index) {\n return index * 2 + 1;\n }\n\n /**\n * Gets the index of the right child of the node at the given index.\n * @param {number} index The index of the node to get the right child for.\n * @return {number} The index of the right child.\n * @private\n */\n getRightChildIndex_(index) {\n return index * 2 + 2;\n }\n\n /**\n * Gets the index of the parent of the node at the given index.\n * @param {number} index The index of the node to get the parent for.\n * @return {number} The index of the parent.\n * @private\n */\n getParentIndex_(index) {\n return (index - 1) >> 1;\n }\n\n /**\n * Make this a heap. O(N).\n * @private\n */\n heapify_() {\n let i;\n for (i = (this.elements_.length >> 1) - 1; i >= 0; i--) {\n this.siftUp_(i);\n }\n }\n\n /**\n * @return {boolean} Is empty.\n */\n isEmpty() {\n return this.elements_.length === 0;\n }\n\n /**\n * @param {string} key Key.\n * @return {boolean} Is key queued.\n */\n isKeyQueued(key) {\n return key in this.queuedElements_;\n }\n\n /**\n * @param {T} element Element.\n * @return {boolean} Is queued.\n */\n isQueued(element) {\n return this.isKeyQueued(this.keyFunction_(element));\n }\n\n /**\n * @param {number} index The index of the node to move down.\n * @private\n */\n siftUp_(index) {\n const elements = this.elements_;\n const priorities = this.priorities_;\n const count = elements.length;\n const element = elements[index];\n const priority = priorities[index];\n const startIndex = index;\n\n while (index < count >> 1) {\n const lIndex = this.getLeftChildIndex_(index);\n const rIndex = this.getRightChildIndex_(index);\n\n const smallerChildIndex =\n rIndex < count && priorities[rIndex] < priorities[lIndex]\n ? rIndex\n : lIndex;\n\n elements[index] = elements[smallerChildIndex];\n priorities[index] = priorities[smallerChildIndex];\n index = smallerChildIndex;\n }\n\n elements[index] = element;\n priorities[index] = priority;\n this.siftDown_(startIndex, index);\n }\n\n /**\n * @param {number} startIndex The index of the root.\n * @param {number} index The index of the node to move up.\n * @private\n */\n siftDown_(startIndex, index) {\n const elements = this.elements_;\n const priorities = this.priorities_;\n const element = elements[index];\n const priority = priorities[index];\n\n while (index > startIndex) {\n const parentIndex = this.getParentIndex_(index);\n if (priorities[parentIndex] > priority) {\n elements[index] = elements[parentIndex];\n priorities[index] = priorities[parentIndex];\n index = parentIndex;\n } else {\n break;\n }\n }\n elements[index] = element;\n priorities[index] = priority;\n }\n\n /**\n * FIXME empty description for jsdoc\n */\n reprioritize() {\n const priorityFunction = this.priorityFunction_;\n const elements = this.elements_;\n const priorities = this.priorities_;\n let index = 0;\n const n = elements.length;\n let element, i, priority;\n for (i = 0; i < n; ++i) {\n element = elements[i];\n priority = priorityFunction(element);\n if (priority == DROP) {\n delete this.queuedElements_[this.keyFunction_(element)];\n } else {\n priorities[index] = priority;\n elements[index++] = element;\n }\n }\n elements.length = index;\n priorities.length = index;\n this.heapify_();\n }\n}\n\nexport default PriorityQueue;\n","/**\n * @module ol/TileQueue\n */\nimport EventType from './events/EventType.js';\nimport PriorityQueue, {DROP} from './structs/PriorityQueue.js';\nimport TileState from './TileState.js';\n\n/**\n * @typedef {function(import(\"./Tile.js\").default, string, import(\"./coordinate.js\").Coordinate, number): number} PriorityFunction\n */\n\nclass TileQueue extends PriorityQueue {\n /**\n * @param {PriorityFunction} tilePriorityFunction Tile priority function.\n * @param {function(): ?} tileChangeCallback Function called on each tile change event.\n */\n constructor(tilePriorityFunction, tileChangeCallback) {\n super(\n /**\n * @param {Array} element Element.\n * @return {number} Priority.\n */\n function (element) {\n return tilePriorityFunction.apply(null, element);\n },\n /**\n * @param {Array} element Element.\n * @return {string} Key.\n */\n function (element) {\n return /** @type {import(\"./Tile.js\").default} */ (element[0]).getKey();\n }\n );\n\n /** @private */\n this.boundHandleTileChange_ = this.handleTileChange.bind(this);\n\n /**\n * @private\n * @type {function(): ?}\n */\n this.tileChangeCallback_ = tileChangeCallback;\n\n /**\n * @private\n * @type {number}\n */\n this.tilesLoading_ = 0;\n\n /**\n * @private\n * @type {!Object}\n */\n this.tilesLoadingKeys_ = {};\n }\n\n /**\n * @param {Array} element Element.\n * @return {boolean} The element was added to the queue.\n */\n enqueue(element) {\n const added = super.enqueue(element);\n if (added) {\n const tile = element[0];\n tile.addEventListener(EventType.CHANGE, this.boundHandleTileChange_);\n }\n return added;\n }\n\n /**\n * @return {number} Number of tiles loading.\n */\n getTilesLoading() {\n return this.tilesLoading_;\n }\n\n /**\n * @param {import(\"./events/Event.js\").default} event Event.\n * @protected\n */\n handleTileChange(event) {\n const tile = /** @type {import(\"./Tile.js\").default} */ (event.target);\n const state = tile.getState();\n if (\n state === TileState.LOADED ||\n state === TileState.ERROR ||\n state === TileState.EMPTY\n ) {\n if (state !== TileState.ERROR) {\n tile.removeEventListener(EventType.CHANGE, this.boundHandleTileChange_);\n }\n const tileKey = tile.getKey();\n if (tileKey in this.tilesLoadingKeys_) {\n delete this.tilesLoadingKeys_[tileKey];\n --this.tilesLoading_;\n }\n this.tileChangeCallback_();\n }\n }\n\n /**\n * @param {number} maxTotalLoading Maximum number tiles to load simultaneously.\n * @param {number} maxNewLoads Maximum number of new tiles to load.\n */\n loadMoreTiles(maxTotalLoading, maxNewLoads) {\n let newLoads = 0;\n let state, tile, tileKey;\n while (\n this.tilesLoading_ < maxTotalLoading &&\n newLoads < maxNewLoads &&\n this.getCount() > 0\n ) {\n tile = /** @type {import(\"./Tile.js\").default} */ (this.dequeue()[0]);\n tileKey = tile.getKey();\n state = tile.getState();\n if (state === TileState.IDLE && !(tileKey in this.tilesLoadingKeys_)) {\n this.tilesLoadingKeys_[tileKey] = true;\n ++this.tilesLoading_;\n ++newLoads;\n tile.load();\n }\n }\n }\n}\n\nexport default TileQueue;\n\n/**\n * @param {import('./Map.js').FrameState} frameState Frame state.\n * @param {import(\"./Tile.js\").default} tile Tile.\n * @param {string} tileSourceKey Tile source key.\n * @param {import(\"./coordinate.js\").Coordinate} tileCenter Tile center.\n * @param {number} tileResolution Tile resolution.\n * @return {number} Tile priority.\n */\nexport function getTilePriority(\n frameState,\n tile,\n tileSourceKey,\n tileCenter,\n tileResolution\n) {\n // Filter out tiles at higher zoom levels than the current zoom level, or that\n // are outside the visible extent.\n if (!frameState || !(tileSourceKey in frameState.wantedTiles)) {\n return DROP;\n }\n if (!frameState.wantedTiles[tileSourceKey][tile.getKey()]) {\n return DROP;\n }\n // Prioritize the highest zoom level tiles closest to the focus.\n // Tiles at higher zoom levels are prioritized using Math.log(tileResolution).\n // Within a zoom level, tiles are prioritized by the distance in pixels between\n // the center of the tile and the center of the viewport. The factor of 65536\n // means that the prioritization should behave as desired for tiles up to\n // 65536 * Math.log(2) = 45426 pixels from the focus.\n const center = frameState.viewState.center;\n const deltaX = tileCenter[0] - center[0];\n const deltaY = tileCenter[1] - center[1];\n return (\n 65536 * Math.log(tileResolution) +\n Math.sqrt(deltaX * deltaX + deltaY * deltaY) / tileResolution\n );\n}\n","/**\n * @module ol/ViewHint\n */\n\n/**\n * @enum {number}\n */\nexport default {\n ANIMATING: 0,\n INTERACTING: 1,\n};\n","/**\n * @module ol/ViewProperty\n */\n\n/**\n * @enum {string}\n */\nexport default {\n CENTER: 'center',\n RESOLUTION: 'resolution',\n ROTATION: 'rotation',\n};\n","/**\n * @module ol/tilegrid/common\n */\n\n/**\n * Default maximum zoom for default tile grids.\n * @type {number}\n */\nexport const DEFAULT_MAX_ZOOM = 42;\n\n/**\n * Default tile size.\n * @type {number}\n */\nexport const DEFAULT_TILE_SIZE = 256;\n","/**\n * @module ol/centerconstraint\n */\nimport {clamp} from './math.js';\n\n/**\n * @typedef {function((import(\"./coordinate.js\").Coordinate|undefined), number, import(\"./size.js\").Size, boolean=, Array=): (import(\"./coordinate.js\").Coordinate|undefined)} Type\n */\n\n/**\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {boolean} onlyCenter If true, the constraint will only apply to the view center.\n * @param {boolean} smooth If true, the view will be able to go slightly out of the given extent\n * (only during interaction and animation).\n * @return {Type} The constraint.\n */\nexport function createExtent(extent, onlyCenter, smooth) {\n return (\n /**\n * @param {import(\"./coordinate.js\").Coordinate|undefined} center Center.\n * @param {number|undefined} resolution Resolution.\n * @param {import(\"./size.js\").Size} size Viewport size; unused if `onlyCenter` was specified.\n * @param {boolean} [isMoving] True if an interaction or animation is in progress.\n * @param {Array} [centerShift] Shift between map center and viewport center.\n * @return {import(\"./coordinate.js\").Coordinate|undefined} Center.\n */\n function (center, resolution, size, isMoving, centerShift) {\n if (!center) {\n return undefined;\n }\n if (!resolution && !onlyCenter) {\n return center;\n }\n const viewWidth = onlyCenter ? 0 : size[0] * resolution;\n const viewHeight = onlyCenter ? 0 : size[1] * resolution;\n const shiftX = centerShift ? centerShift[0] : 0;\n const shiftY = centerShift ? centerShift[1] : 0;\n let minX = extent[0] + viewWidth / 2 + shiftX;\n let maxX = extent[2] - viewWidth / 2 + shiftX;\n let minY = extent[1] + viewHeight / 2 + shiftY;\n let maxY = extent[3] - viewHeight / 2 + shiftY;\n\n // note: when zooming out of bounds, min and max values for x and y may\n // end up inverted (min > max); this has to be accounted for\n if (minX > maxX) {\n minX = (maxX + minX) / 2;\n maxX = minX;\n }\n if (minY > maxY) {\n minY = (maxY + minY) / 2;\n maxY = minY;\n }\n\n let x = clamp(center[0], minX, maxX);\n let y = clamp(center[1], minY, maxY);\n\n // during an interaction, allow some overscroll\n if (isMoving && smooth && resolution) {\n const ratio = 30 * resolution;\n x +=\n -ratio * Math.log(1 + Math.max(0, minX - center[0]) / ratio) +\n ratio * Math.log(1 + Math.max(0, center[0] - maxX) / ratio);\n y +=\n -ratio * Math.log(1 + Math.max(0, minY - center[1]) / ratio) +\n ratio * Math.log(1 + Math.max(0, center[1] - maxY) / ratio);\n }\n\n return [x, y];\n }\n );\n}\n\n/**\n * @param {import(\"./coordinate.js\").Coordinate} [center] Center.\n * @return {import(\"./coordinate.js\").Coordinate|undefined} Center.\n */\nexport function none(center) {\n return center;\n}\n","/**\n * @module ol/resolutionconstraint\n */\nimport {clamp} from './math.js';\nimport {getHeight, getWidth} from './extent.js';\nimport {linearFindNearest} from './array.js';\n\n/**\n * @typedef {function((number|undefined), number, import(\"./size.js\").Size, boolean=): (number|undefined)} Type\n */\n\n/**\n * Returns a modified resolution taking into account the viewport size and maximum\n * allowed extent.\n * @param {number} resolution Resolution\n * @param {import(\"./extent.js\").Extent} maxExtent Maximum allowed extent.\n * @param {import(\"./size.js\").Size} viewportSize Viewport size.\n * @param {boolean} showFullExtent Whether to show the full extent.\n * @return {number} Capped resolution.\n */\nfunction getViewportClampedResolution(\n resolution,\n maxExtent,\n viewportSize,\n showFullExtent\n) {\n const xResolution = getWidth(maxExtent) / viewportSize[0];\n const yResolution = getHeight(maxExtent) / viewportSize[1];\n\n if (showFullExtent) {\n return Math.min(resolution, Math.max(xResolution, yResolution));\n }\n return Math.min(resolution, Math.min(xResolution, yResolution));\n}\n\n/**\n * Returns a modified resolution to be between maxResolution and minResolution while\n * still allowing the value to be slightly out of bounds.\n * Note: the computation is based on the logarithm function (ln):\n * - at 1, ln(x) is 0\n * - above 1, ln(x) keeps increasing but at a much slower pace than x\n * The final result is clamped to prevent getting too far away from bounds.\n * @param {number} resolution Resolution.\n * @param {number} maxResolution Max resolution.\n * @param {number} minResolution Min resolution.\n * @return {number} Smoothed resolution.\n */\nfunction getSmoothClampedResolution(resolution, maxResolution, minResolution) {\n let result = Math.min(resolution, maxResolution);\n const ratio = 50;\n\n result *=\n Math.log(1 + ratio * Math.max(0, resolution / maxResolution - 1)) / ratio +\n 1;\n if (minResolution) {\n result = Math.max(result, minResolution);\n result /=\n Math.log(1 + ratio * Math.max(0, minResolution / resolution - 1)) /\n ratio +\n 1;\n }\n return clamp(result, minResolution / 2, maxResolution * 2);\n}\n\n/**\n * @param {Array} resolutions Resolutions.\n * @param {boolean} [smooth] If true, the view will be able to slightly exceed resolution limits. Default: true.\n * @param {import(\"./extent.js\").Extent} [maxExtent] Maximum allowed extent.\n * @param {boolean} [showFullExtent] If true, allows us to show the full extent. Default: false.\n * @return {Type} Zoom function.\n */\nexport function createSnapToResolutions(\n resolutions,\n smooth,\n maxExtent,\n showFullExtent\n) {\n smooth = smooth !== undefined ? smooth : true;\n return (\n /**\n * @param {number|undefined} resolution Resolution.\n * @param {number} direction Direction.\n * @param {import(\"./size.js\").Size} size Viewport size.\n * @param {boolean} [isMoving] True if an interaction or animation is in progress.\n * @return {number|undefined} Resolution.\n */\n function (resolution, direction, size, isMoving) {\n if (resolution !== undefined) {\n const maxResolution = resolutions[0];\n const minResolution = resolutions[resolutions.length - 1];\n const cappedMaxRes = maxExtent\n ? getViewportClampedResolution(\n maxResolution,\n maxExtent,\n size,\n showFullExtent\n )\n : maxResolution;\n\n // during interacting or animating, allow intermediary values\n if (isMoving) {\n if (!smooth) {\n return clamp(resolution, minResolution, cappedMaxRes);\n }\n return getSmoothClampedResolution(\n resolution,\n cappedMaxRes,\n minResolution\n );\n }\n\n const capped = Math.min(cappedMaxRes, resolution);\n const z = Math.floor(linearFindNearest(resolutions, capped, direction));\n if (resolutions[z] > cappedMaxRes && z < resolutions.length - 1) {\n return resolutions[z + 1];\n }\n return resolutions[z];\n }\n return undefined;\n }\n );\n}\n\n/**\n * @param {number} power Power.\n * @param {number} maxResolution Maximum resolution.\n * @param {number} [minResolution] Minimum resolution.\n * @param {boolean} [smooth] If true, the view will be able to slightly exceed resolution limits. Default: true.\n * @param {import(\"./extent.js\").Extent} [maxExtent] Maximum allowed extent.\n * @param {boolean} [showFullExtent] If true, allows us to show the full extent. Default: false.\n * @return {Type} Zoom function.\n */\nexport function createSnapToPower(\n power,\n maxResolution,\n minResolution,\n smooth,\n maxExtent,\n showFullExtent\n) {\n smooth = smooth !== undefined ? smooth : true;\n minResolution = minResolution !== undefined ? minResolution : 0;\n\n return (\n /**\n * @param {number|undefined} resolution Resolution.\n * @param {number} direction Direction.\n * @param {import(\"./size.js\").Size} size Viewport size.\n * @param {boolean} [isMoving] True if an interaction or animation is in progress.\n * @return {number|undefined} Resolution.\n */\n function (resolution, direction, size, isMoving) {\n if (resolution !== undefined) {\n const cappedMaxRes = maxExtent\n ? getViewportClampedResolution(\n maxResolution,\n maxExtent,\n size,\n showFullExtent\n )\n : maxResolution;\n\n // during interacting or animating, allow intermediary values\n if (isMoving) {\n if (!smooth) {\n return clamp(resolution, minResolution, cappedMaxRes);\n }\n return getSmoothClampedResolution(\n resolution,\n cappedMaxRes,\n minResolution\n );\n }\n\n const tolerance = 1e-9;\n const minZoomLevel = Math.ceil(\n Math.log(maxResolution / cappedMaxRes) / Math.log(power) - tolerance\n );\n const offset = -direction * (0.5 - tolerance) + 0.5;\n const capped = Math.min(cappedMaxRes, resolution);\n const cappedZoomLevel = Math.floor(\n Math.log(maxResolution / capped) / Math.log(power) + offset\n );\n const zoomLevel = Math.max(minZoomLevel, cappedZoomLevel);\n const newResolution = maxResolution / Math.pow(power, zoomLevel);\n return clamp(newResolution, minResolution, cappedMaxRes);\n }\n return undefined;\n }\n );\n}\n\n/**\n * @param {number} maxResolution Max resolution.\n * @param {number} minResolution Min resolution.\n * @param {boolean} [smooth] If true, the view will be able to slightly exceed resolution limits. Default: true.\n * @param {import(\"./extent.js\").Extent} [maxExtent] Maximum allowed extent.\n * @param {boolean} [showFullExtent] If true, allows us to show the full extent. Default: false.\n * @return {Type} Zoom function.\n */\nexport function createMinMaxResolution(\n maxResolution,\n minResolution,\n smooth,\n maxExtent,\n showFullExtent\n) {\n smooth = smooth !== undefined ? smooth : true;\n\n return (\n /**\n * @param {number|undefined} resolution Resolution.\n * @param {number} direction Direction.\n * @param {import(\"./size.js\").Size} size Viewport size.\n * @param {boolean} [isMoving] True if an interaction or animation is in progress.\n * @return {number|undefined} Resolution.\n */\n function (resolution, direction, size, isMoving) {\n if (resolution !== undefined) {\n const cappedMaxRes = maxExtent\n ? getViewportClampedResolution(\n maxResolution,\n maxExtent,\n size,\n showFullExtent\n )\n : maxResolution;\n\n if (!smooth || !isMoving) {\n return clamp(resolution, minResolution, cappedMaxRes);\n }\n return getSmoothClampedResolution(\n resolution,\n cappedMaxRes,\n minResolution\n );\n }\n return undefined;\n }\n );\n}\n","/**\n * @module ol/rotationconstraint\n */\nimport {toRadians} from './math.js';\n\n/**\n * @typedef {function((number|undefined), boolean=): (number|undefined)} Type\n */\n\n/**\n * @param {number|undefined} rotation Rotation.\n * @return {number|undefined} Rotation.\n */\nexport function disable(rotation) {\n if (rotation !== undefined) {\n return 0;\n }\n return undefined;\n}\n\n/**\n * @param {number|undefined} rotation Rotation.\n * @return {number|undefined} Rotation.\n */\nexport function none(rotation) {\n if (rotation !== undefined) {\n return rotation;\n }\n return undefined;\n}\n\n/**\n * @param {number} n N.\n * @return {Type} Rotation constraint.\n */\nexport function createSnapToN(n) {\n const theta = (2 * Math.PI) / n;\n return (\n /**\n * @param {number|undefined} rotation Rotation.\n * @param {boolean} [isMoving] True if an interaction or animation is in progress.\n * @return {number|undefined} Rotation.\n */\n function (rotation, isMoving) {\n if (isMoving) {\n return rotation;\n }\n\n if (rotation !== undefined) {\n rotation = Math.floor(rotation / theta + 0.5) * theta;\n return rotation;\n }\n return undefined;\n }\n );\n}\n\n/**\n * @param {number} [tolerance] Tolerance.\n * @return {Type} Rotation constraint.\n */\nexport function createSnapToZero(tolerance) {\n tolerance = tolerance || toRadians(5);\n return (\n /**\n * @param {number|undefined} rotation Rotation.\n * @param {boolean} [isMoving] True if an interaction or animation is in progress.\n * @return {number|undefined} Rotation.\n */\n function (rotation, isMoving) {\n if (isMoving) {\n return rotation;\n }\n\n if (rotation !== undefined) {\n if (Math.abs(rotation) <= tolerance) {\n return 0;\n }\n return rotation;\n }\n return undefined;\n }\n );\n}\n","/**\n * @module ol/View\n */\nimport BaseObject from './Object.js';\nimport ViewHint from './ViewHint.js';\nimport ViewProperty from './ViewProperty.js';\nimport {DEFAULT_TILE_SIZE} from './tilegrid/common.js';\nimport {\n METERS_PER_UNIT,\n createProjection,\n disableCoordinateWarning,\n fromUserCoordinate,\n fromUserExtent,\n getUserProjection,\n toUserCoordinate,\n toUserExtent,\n} from './proj.js';\nimport {VOID} from './functions.js';\nimport {\n add as addCoordinate,\n equals as coordinatesEqual,\n equals,\n rotate as rotateCoordinate,\n} from './coordinate.js';\nimport {assert} from './asserts.js';\nimport {none as centerNone, createExtent} from './centerconstraint.js';\nimport {clamp, modulo} from './math.js';\nimport {\n createMinMaxResolution,\n createSnapToPower,\n createSnapToResolutions,\n} from './resolutionconstraint.js';\nimport {\n createSnapToN,\n createSnapToZero,\n disable,\n none as rotationNone,\n} from './rotationconstraint.js';\nimport {easeOut, inAndOut} from './easing.js';\nimport {\n getCenter,\n getForViewAndSize,\n getHeight,\n getWidth,\n isEmpty,\n} from './extent.js';\nimport {linearFindNearest} from './array.js';\nimport {fromExtent as polygonFromExtent} from './geom/Polygon.js';\n\n/**\n * An animation configuration\n *\n * @typedef {Object} Animation\n * @property {import(\"./coordinate.js\").Coordinate} [sourceCenter] Source center.\n * @property {import(\"./coordinate.js\").Coordinate} [targetCenter] Target center.\n * @property {number} [sourceResolution] Source resolution.\n * @property {number} [targetResolution] Target resolution.\n * @property {number} [sourceRotation] Source rotation.\n * @property {number} [targetRotation] Target rotation.\n * @property {import(\"./coordinate.js\").Coordinate} [anchor] Anchor.\n * @property {number} start Start.\n * @property {number} duration Duration.\n * @property {boolean} complete Complete.\n * @property {function(number):number} easing Easing.\n * @property {function(boolean):void} callback Callback.\n */\n\n/**\n * @typedef {Object} Constraints\n * @property {import(\"./centerconstraint.js\").Type} center Center.\n * @property {import(\"./resolutionconstraint.js\").Type} resolution Resolution.\n * @property {import(\"./rotationconstraint.js\").Type} rotation Rotation.\n */\n\n/**\n * @typedef {Object} FitOptions\n * @property {import(\"./size.js\").Size} [size] The size in pixels of the box to fit\n * the extent into. Default is the current size of the first map in the DOM that\n * uses this view, or `[100, 100]` if no such map is found.\n * @property {!Array} [padding=[0, 0, 0, 0]] Padding (in pixels) to be\n * cleared inside the view. Values in the array are top, right, bottom and left\n * padding.\n * @property {boolean} [nearest=false] If the view `constrainResolution` option is `true`,\n * get the nearest extent instead of the closest that actually fits the view.\n * @property {number} [minResolution=0] Minimum resolution that we zoom to.\n * @property {number} [maxZoom] Maximum zoom level that we zoom to. If\n * `minResolution` is given, this property is ignored.\n * @property {number} [duration] The duration of the animation in milliseconds.\n * By default, there is no animation to the target extent.\n * @property {function(number):number} [easing] The easing function used during\n * the animation (defaults to {@link module:ol/easing.inAndOut}).\n * The function will be called for each frame with a number representing a\n * fraction of the animation's duration. The function should return a number\n * between 0 and 1 representing the progress toward the destination state.\n * @property {function(boolean):void} [callback] Function called when the view is in\n * its final position. The callback will be called with `true` if the animation\n * series completed on its own or `false` if it was cancelled.\n */\n\n/**\n * @typedef {Object} ViewOptions\n * @property {import(\"./coordinate.js\").Coordinate} [center] The initial center for\n * the view. If a user projection is not set, the coordinate system for the center is\n * specified with the `projection` option. Layer sources will not be fetched if this\n * is not set, but the center can be set later with {@link #setCenter}.\n * @property {boolean|number} [constrainRotation=true] Rotation constraint.\n * `false` means no constraint. `true` means no constraint, but snap to zero\n * near zero. A number constrains the rotation to that number of values. For\n * example, `4` will constrain the rotation to 0, 90, 180, and 270 degrees.\n * @property {boolean} [enableRotation=true] Enable rotation.\n * If `false`, a rotation constraint that always sets the rotation to zero is\n * used. The `constrainRotation` option has no effect if `enableRotation` is\n * `false`.\n * @property {import(\"./extent.js\").Extent} [extent] The extent that constrains the\n * view, in other words, nothing outside of this extent can be visible on the map.\n * @property {boolean} [constrainOnlyCenter=false] If true, the extent\n * constraint will only apply to the view center and not the whole extent.\n * @property {boolean} [smoothExtentConstraint=true] If true, the extent\n * constraint will be applied smoothly, i.e. allow the view to go slightly outside\n * of the given `extent`.\n * @property {number} [maxResolution] The maximum resolution used to determine\n * the resolution constraint. It is used together with `minResolution` (or\n * `maxZoom`) and `zoomFactor`. If unspecified it is calculated in such a way\n * that the projection's validity extent fits in a 256x256 px tile. If the\n * projection is Spherical Mercator (the default) then `maxResolution` defaults\n * to `40075016.68557849 / 256 = 156543.03392804097`.\n * @property {number} [minResolution] The minimum resolution used to determine\n * the resolution constraint. It is used together with `maxResolution` (or\n * `minZoom`) and `zoomFactor`. If unspecified it is calculated assuming 29\n * zoom levels (with a factor of 2). If the projection is Spherical Mercator\n * (the default) then `minResolution` defaults to\n * `40075016.68557849 / 256 / Math.pow(2, 28) = 0.0005831682455839253`.\n * @property {number} [maxZoom=28] The maximum zoom level used to determine the\n * resolution constraint. It is used together with `minZoom` (or\n * `maxResolution`) and `zoomFactor`. Note that if `minResolution` is also\n * provided, it is given precedence over `maxZoom`.\n * @property {number} [minZoom=0] The minimum zoom level used to determine the\n * resolution constraint. It is used together with `maxZoom` (or\n * `minResolution`) and `zoomFactor`. Note that if `maxResolution` is also\n * provided, it is given precedence over `minZoom`.\n * @property {boolean} [multiWorld=false] If `false` the view is constrained so\n * only one world is visible, and you cannot pan off the edge. If `true` the map\n * may show multiple worlds at low zoom levels. Only used if the `projection` is\n * global. Note that if `extent` is also provided it is given precedence.\n * @property {boolean} [constrainResolution=false] If true, the view will always\n * animate to the closest zoom level after an interaction; false means\n * intermediary zoom levels are allowed.\n * @property {boolean} [smoothResolutionConstraint=true] If true, the resolution\n * min/max values will be applied smoothly, i. e. allow the view to exceed slightly\n * the given resolution or zoom bounds.\n * @property {boolean} [showFullExtent=false] Allow the view to be zoomed out to\n * show the full configured extent. By default, when a view is configured with an\n * extent, users will not be able to zoom out so the viewport exceeds the extent in\n * either dimension. This means the full extent may not be visible if the viewport\n * is taller or wider than the aspect ratio of the configured extent. If\n * showFullExtent is true, the user will be able to zoom out so that the viewport\n * exceeds the height or width of the configured extent, but not both, allowing the\n * full extent to be shown.\n * @property {import(\"./proj.js\").ProjectionLike} [projection='EPSG:3857'] The\n * projection. The default is Spherical Mercator.\n * @property {number} [resolution] The initial resolution for the view. The\n * units are `projection` units per pixel (e.g. meters per pixel). An\n * alternative to setting this is to set `zoom`. Layer sources will not be\n * fetched if neither this nor `zoom` are defined, but they can be set later\n * with {@link #setZoom} or {@link #setResolution}.\n * @property {Array} [resolutions] Resolutions that determine the\n * zoom levels if specified. The index in the array corresponds to the zoom level,\n * therefore the resolution values have to be in descending order. It also constrains\n * the resolution by the minimum and maximum value. If set the `maxResolution`,\n * `minResolution`, `minZoom`, `maxZoom`, and `zoomFactor` options are ignored.\n * @property {number} [rotation=0] The initial rotation for the view in radians\n * (positive rotation clockwise, 0 means North).\n * @property {number} [zoom] Only used if `resolution` is not defined. Zoom\n * level used to calculate the initial resolution for the view.\n * @property {number} [zoomFactor=2] The zoom factor used to compute the\n * corresponding resolution.\n * @property {!Array} [padding=[0, 0, 0, 0]] Padding (in css pixels).\n * If the map viewport is partially covered with other content (overlays) along\n * its edges, this setting allows to shift the center of the viewport away from\n * that content. The order of the values is top, right, bottom, left.\n */\n\n/**\n * @typedef {Object} AnimationOptions\n * @property {import(\"./coordinate.js\").Coordinate} [center] The center of the view at the end of\n * the animation.\n * @property {number} [zoom] The zoom level of the view at the end of the\n * animation. This takes precedence over `resolution`.\n * @property {number} [resolution] The resolution of the view at the end\n * of the animation. If `zoom` is also provided, this option will be ignored.\n * @property {number} [rotation] The rotation of the view at the end of\n * the animation.\n * @property {import(\"./coordinate.js\").Coordinate} [anchor] Optional anchor to remain fixed\n * during a rotation or resolution animation.\n * @property {number} [duration=1000] The duration of the animation in milliseconds.\n * @property {function(number):number} [easing] The easing function used\n * during the animation (defaults to {@link module:ol/easing.inAndOut}).\n * The function will be called for each frame with a number representing a\n * fraction of the animation's duration. The function should return a number\n * between 0 and 1 representing the progress toward the destination state.\n */\n\n/**\n * @typedef {Object} State\n * @property {import(\"./coordinate.js\").Coordinate} center Center.\n * @property {import(\"./proj/Projection.js\").default} projection Projection.\n * @property {number} resolution Resolution.\n * @property {import(\"./coordinate.js\").Coordinate} [nextCenter] The next center during an animation series.\n * @property {number} [nextResolution] The next resolution during an animation series.\n * @property {number} [nextRotation] The next rotation during an animation series.\n * @property {number} rotation Rotation.\n * @property {number} zoom Zoom.\n */\n\n/**\n * Default min zoom level for the map view.\n * @type {number}\n */\nconst DEFAULT_MIN_ZOOM = 0;\n\n/**\n * @typedef {import(\"./ObjectEventType\").Types|'change:center'|'change:resolution'|'change:rotation'} ViewObjectEventTypes\n */\n\n/***\n * @template Return\n * @typedef {import(\"./Observable\").OnSignature &\n * import(\"./Observable\").OnSignature &\n * import(\"./Observable\").CombinedOnSignature} ViewOnSignature\n */\n\n/**\n * @classdesc\n * A View object represents a simple 2D view of the map.\n *\n * This is the object to act upon to change the center, resolution,\n * and rotation of the map.\n *\n * A View has a `projection`. The projection determines the\n * coordinate system of the center, and its units determine the units of the\n * resolution (projection units per pixel). The default projection is\n * Web Mercator (EPSG:3857).\n *\n * ### The view states\n *\n * A View is determined by three states: `center`, `resolution`,\n * and `rotation`. Each state has a corresponding getter and setter, e.g.\n * `getCenter` and `setCenter` for the `center` state.\n *\n * The `zoom` state is actually not saved on the view: all computations\n * internally use the `resolution` state. Still, the `setZoom` and `getZoom`\n * methods are available, as well as `getResolutionForZoom` and\n * `getZoomForResolution` to switch from one system to the other.\n *\n * ### The constraints\n *\n * `setCenter`, `setResolution` and `setRotation` can be used to change the\n * states of the view, but any constraint defined in the constructor will\n * be applied along the way.\n *\n * A View object can have a *resolution constraint*, a *rotation constraint*\n * and a *center constraint*.\n *\n * The *resolution constraint* typically restricts min/max values and\n * snaps to specific resolutions. It is determined by the following\n * options: `resolutions`, `maxResolution`, `maxZoom` and `zoomFactor`.\n * If `resolutions` is set, the other three options are ignored. See\n * documentation for each option for more information. By default, the view\n * only has a min/max restriction and allow intermediary zoom levels when\n * pinch-zooming for example.\n *\n * The *rotation constraint* snaps to specific angles. It is determined\n * by the following options: `enableRotation` and `constrainRotation`.\n * By default rotation is allowed and its value is snapped to zero when approaching the\n * horizontal.\n *\n * The *center constraint* is determined by the `extent` option. By\n * default the view center is not constrained at all.\n *\n * ### Changing the view state\n *\n * It is important to note that `setZoom`, `setResolution`, `setCenter` and\n * `setRotation` are subject to the above mentioned constraints. As such, it\n * may sometimes not be possible to know in advance the resulting state of the\n * View. For example, calling `setResolution(10)` does not guarantee that\n * `getResolution()` will return `10`.\n *\n * A consequence of this is that, when applying a delta on the view state, one\n * should use `adjustCenter`, `adjustRotation`, `adjustZoom` and `adjustResolution`\n * rather than the corresponding setters. This will let view do its internal\n * computations. Besides, the `adjust*` methods also take an `anchor`\n * argument which allows specifying an origin for the transformation.\n *\n * ### Interacting with the view\n *\n * View constraints are usually only applied when the view is *at rest*, meaning that\n * no interaction or animation is ongoing. As such, if the user puts the view in a\n * state that is not equivalent to a constrained one (e.g. rotating the view when\n * the snap angle is 0), an animation will be triggered at the interaction end to\n * put back the view to a stable state;\n *\n * @api\n */\nclass View extends BaseObject {\n /**\n * @param {ViewOptions} [options] View options.\n */\n constructor(options) {\n super();\n\n /***\n * @type {ViewOnSignature}\n */\n this.on;\n\n /***\n * @type {ViewOnSignature}\n */\n this.once;\n\n /***\n * @type {ViewOnSignature}\n */\n this.un;\n\n options = Object.assign({}, options);\n\n /**\n * @private\n * @type {Array}\n */\n this.hints_ = [0, 0];\n\n /**\n * @private\n * @type {Array>}\n */\n this.animations_ = [];\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.updateAnimationKey_;\n\n /**\n * @private\n * @const\n * @type {import(\"./proj/Projection.js\").default}\n */\n this.projection_ = createProjection(options.projection, 'EPSG:3857');\n\n /**\n * @private\n * @type {import(\"./size.js\").Size}\n */\n this.viewportSize_ = [100, 100];\n\n /**\n * @private\n * @type {import(\"./coordinate.js\").Coordinate|undefined}\n */\n this.targetCenter_ = null;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.targetResolution_;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.targetRotation_;\n\n /**\n * @private\n * @type {import(\"./coordinate.js\").Coordinate}\n */\n this.nextCenter_ = null;\n\n /**\n * @private\n * @type {number}\n */\n this.nextResolution_;\n\n /**\n * @private\n * @type {number}\n */\n this.nextRotation_;\n\n /**\n * @private\n * @type {import(\"./coordinate.js\").Coordinate|undefined}\n */\n this.cancelAnchor_ = undefined;\n\n if (options.projection) {\n disableCoordinateWarning();\n }\n if (options.center) {\n options.center = fromUserCoordinate(options.center, this.projection_);\n }\n if (options.extent) {\n options.extent = fromUserExtent(options.extent, this.projection_);\n }\n\n this.applyOptions_(options);\n }\n\n /**\n * Set up the view with the given options.\n * @param {ViewOptions} options View options.\n */\n applyOptions_(options) {\n const properties = Object.assign({}, options);\n for (const key in ViewProperty) {\n delete properties[key];\n }\n this.setProperties(properties, true);\n\n const resolutionConstraintInfo = createResolutionConstraint(options);\n\n /**\n * @private\n * @type {number}\n */\n this.maxResolution_ = resolutionConstraintInfo.maxResolution;\n\n /**\n * @private\n * @type {number}\n */\n this.minResolution_ = resolutionConstraintInfo.minResolution;\n\n /**\n * @private\n * @type {number}\n */\n this.zoomFactor_ = resolutionConstraintInfo.zoomFactor;\n\n /**\n * @private\n * @type {Array|undefined}\n */\n this.resolutions_ = options.resolutions;\n\n /**\n * @type {Array|undefined}\n * @private\n */\n this.padding_ = options.padding;\n\n /**\n * @private\n * @type {number}\n */\n this.minZoom_ = resolutionConstraintInfo.minZoom;\n\n const centerConstraint = createCenterConstraint(options);\n const resolutionConstraint = resolutionConstraintInfo.constraint;\n const rotationConstraint = createRotationConstraint(options);\n\n /**\n * @private\n * @type {Constraints}\n */\n this.constraints_ = {\n center: centerConstraint,\n resolution: resolutionConstraint,\n rotation: rotationConstraint,\n };\n\n this.setRotation(options.rotation !== undefined ? options.rotation : 0);\n this.setCenterInternal(\n options.center !== undefined ? options.center : null\n );\n if (options.resolution !== undefined) {\n this.setResolution(options.resolution);\n } else if (options.zoom !== undefined) {\n this.setZoom(options.zoom);\n }\n }\n\n /**\n * Padding (in css pixels).\n * If the map viewport is partially covered with other content (overlays) along\n * its edges, this setting allows to shift the center of the viewport away from that\n * content. The order of the values in the array is top, right, bottom, left.\n * The default is no padding, which is equivalent to `[0, 0, 0, 0]`.\n * @type {Array|undefined}\n * @api\n */\n get padding() {\n return this.padding_;\n }\n set padding(padding) {\n let oldPadding = this.padding_;\n this.padding_ = padding;\n const center = this.getCenter();\n if (center) {\n const newPadding = padding || [0, 0, 0, 0];\n oldPadding = oldPadding || [0, 0, 0, 0];\n const resolution = this.getResolution();\n const offsetX =\n (resolution / 2) *\n (newPadding[3] - oldPadding[3] + oldPadding[1] - newPadding[1]);\n const offsetY =\n (resolution / 2) *\n (newPadding[0] - oldPadding[0] + oldPadding[2] - newPadding[2]);\n this.setCenterInternal([center[0] + offsetX, center[1] - offsetY]);\n }\n }\n\n /**\n * Get an updated version of the view options used to construct the view. The\n * current resolution (or zoom), center, and rotation are applied to any stored\n * options. The provided options can be used to apply new min/max zoom or\n * resolution limits.\n * @param {ViewOptions} newOptions New options to be applied.\n * @return {ViewOptions} New options updated with the current view state.\n */\n getUpdatedOptions_(newOptions) {\n const options = this.getProperties();\n\n // preserve resolution (or zoom)\n if (options.resolution !== undefined) {\n options.resolution = this.getResolution();\n } else {\n options.zoom = this.getZoom();\n }\n\n // preserve center\n options.center = this.getCenterInternal();\n\n // preserve rotation\n options.rotation = this.getRotation();\n\n return Object.assign({}, options, newOptions);\n }\n\n /**\n * Animate the view. The view's center, zoom (or resolution), and rotation\n * can be animated for smooth transitions between view states. For example,\n * to animate the view to a new zoom level:\n *\n * view.animate({zoom: view.getZoom() + 1});\n *\n * By default, the animation lasts one second and uses in-and-out easing. You\n * can customize this behavior by including `duration` (in milliseconds) and\n * `easing` options (see {@link module:ol/easing}).\n *\n * To chain together multiple animations, call the method with multiple\n * animation objects. For example, to first zoom and then pan:\n *\n * view.animate({zoom: 10}, {center: [0, 0]});\n *\n * If you provide a function as the last argument to the animate method, it\n * will get called at the end of an animation series. The callback will be\n * called with `true` if the animation series completed on its own or `false`\n * if it was cancelled.\n *\n * Animations are cancelled by user interactions (e.g. dragging the map) or by\n * calling `view.setCenter()`, `view.setResolution()`, or `view.setRotation()`\n * (or another method that calls one of these).\n *\n * @param {...(AnimationOptions|function(boolean): void)} var_args Animation\n * options. Multiple animations can be run in series by passing multiple\n * options objects. To run multiple animations in parallel, call the method\n * multiple times. An optional callback can be provided as a final\n * argument. The callback will be called with a boolean indicating whether\n * the animation completed without being cancelled.\n * @api\n */\n animate(var_args) {\n if (this.isDef() && !this.getAnimating()) {\n this.resolveConstraints(0);\n }\n const args = new Array(arguments.length);\n for (let i = 0; i < args.length; ++i) {\n let options = arguments[i];\n if (options.center) {\n options = Object.assign({}, options);\n options.center = fromUserCoordinate(\n options.center,\n this.getProjection()\n );\n }\n if (options.anchor) {\n options = Object.assign({}, options);\n options.anchor = fromUserCoordinate(\n options.anchor,\n this.getProjection()\n );\n }\n args[i] = options;\n }\n this.animateInternal.apply(this, args);\n }\n\n /**\n * @param {...(AnimationOptions|function(boolean): void)} var_args Animation options.\n */\n animateInternal(var_args) {\n let animationCount = arguments.length;\n let callback;\n if (\n animationCount > 1 &&\n typeof arguments[animationCount - 1] === 'function'\n ) {\n callback = arguments[animationCount - 1];\n --animationCount;\n }\n\n let i = 0;\n for (; i < animationCount && !this.isDef(); ++i) {\n // if view properties are not yet set, shortcut to the final state\n const state = arguments[i];\n if (state.center) {\n this.setCenterInternal(state.center);\n }\n if (state.zoom !== undefined) {\n this.setZoom(state.zoom);\n } else if (state.resolution) {\n this.setResolution(state.resolution);\n }\n if (state.rotation !== undefined) {\n this.setRotation(state.rotation);\n }\n }\n if (i === animationCount) {\n if (callback) {\n animationCallback(callback, true);\n }\n return;\n }\n\n let start = Date.now();\n let center = this.targetCenter_.slice();\n let resolution = this.targetResolution_;\n let rotation = this.targetRotation_;\n const series = [];\n for (; i < animationCount; ++i) {\n const options = /** @type {AnimationOptions} */ (arguments[i]);\n\n const animation = {\n start: start,\n complete: false,\n anchor: options.anchor,\n duration: options.duration !== undefined ? options.duration : 1000,\n easing: options.easing || inAndOut,\n callback: callback,\n };\n\n if (options.center) {\n animation.sourceCenter = center;\n animation.targetCenter = options.center.slice();\n center = animation.targetCenter;\n }\n\n if (options.zoom !== undefined) {\n animation.sourceResolution = resolution;\n animation.targetResolution = this.getResolutionForZoom(options.zoom);\n resolution = animation.targetResolution;\n } else if (options.resolution) {\n animation.sourceResolution = resolution;\n animation.targetResolution = options.resolution;\n resolution = animation.targetResolution;\n }\n\n if (options.rotation !== undefined) {\n animation.sourceRotation = rotation;\n const delta =\n modulo(options.rotation - rotation + Math.PI, 2 * Math.PI) - Math.PI;\n animation.targetRotation = rotation + delta;\n rotation = animation.targetRotation;\n }\n\n // check if animation is a no-op\n if (isNoopAnimation(animation)) {\n animation.complete = true;\n // we still push it onto the series for callback handling\n } else {\n start += animation.duration;\n }\n series.push(animation);\n }\n this.animations_.push(series);\n this.setHint(ViewHint.ANIMATING, 1);\n this.updateAnimations_();\n }\n\n /**\n * Determine if the view is being animated.\n * @return {boolean} The view is being animated.\n * @api\n */\n getAnimating() {\n return this.hints_[ViewHint.ANIMATING] > 0;\n }\n\n /**\n * Determine if the user is interacting with the view, such as panning or zooming.\n * @return {boolean} The view is being interacted with.\n * @api\n */\n getInteracting() {\n return this.hints_[ViewHint.INTERACTING] > 0;\n }\n\n /**\n * Cancel any ongoing animations.\n * @api\n */\n cancelAnimations() {\n this.setHint(ViewHint.ANIMATING, -this.hints_[ViewHint.ANIMATING]);\n let anchor;\n for (let i = 0, ii = this.animations_.length; i < ii; ++i) {\n const series = this.animations_[i];\n if (series[0].callback) {\n animationCallback(series[0].callback, false);\n }\n if (!anchor) {\n for (let j = 0, jj = series.length; j < jj; ++j) {\n const animation = series[j];\n if (!animation.complete) {\n anchor = animation.anchor;\n break;\n }\n }\n }\n }\n this.animations_.length = 0;\n this.cancelAnchor_ = anchor;\n this.nextCenter_ = null;\n this.nextResolution_ = NaN;\n this.nextRotation_ = NaN;\n }\n\n /**\n * Update all animations.\n */\n updateAnimations_() {\n if (this.updateAnimationKey_ !== undefined) {\n cancelAnimationFrame(this.updateAnimationKey_);\n this.updateAnimationKey_ = undefined;\n }\n if (!this.getAnimating()) {\n return;\n }\n const now = Date.now();\n let more = false;\n for (let i = this.animations_.length - 1; i >= 0; --i) {\n const series = this.animations_[i];\n let seriesComplete = true;\n for (let j = 0, jj = series.length; j < jj; ++j) {\n const animation = series[j];\n if (animation.complete) {\n continue;\n }\n const elapsed = now - animation.start;\n let fraction =\n animation.duration > 0 ? elapsed / animation.duration : 1;\n if (fraction >= 1) {\n animation.complete = true;\n fraction = 1;\n } else {\n seriesComplete = false;\n }\n const progress = animation.easing(fraction);\n if (animation.sourceCenter) {\n const x0 = animation.sourceCenter[0];\n const y0 = animation.sourceCenter[1];\n const x1 = animation.targetCenter[0];\n const y1 = animation.targetCenter[1];\n this.nextCenter_ = animation.targetCenter;\n const x = x0 + progress * (x1 - x0);\n const y = y0 + progress * (y1 - y0);\n this.targetCenter_ = [x, y];\n }\n if (animation.sourceResolution && animation.targetResolution) {\n const resolution =\n progress === 1\n ? animation.targetResolution\n : animation.sourceResolution +\n progress *\n (animation.targetResolution - animation.sourceResolution);\n if (animation.anchor) {\n const size = this.getViewportSize_(this.getRotation());\n const constrainedResolution = this.constraints_.resolution(\n resolution,\n 0,\n size,\n true\n );\n this.targetCenter_ = this.calculateCenterZoom(\n constrainedResolution,\n animation.anchor\n );\n }\n this.nextResolution_ = animation.targetResolution;\n this.targetResolution_ = resolution;\n this.applyTargetState_(true);\n }\n if (\n animation.sourceRotation !== undefined &&\n animation.targetRotation !== undefined\n ) {\n const rotation =\n progress === 1\n ? modulo(animation.targetRotation + Math.PI, 2 * Math.PI) -\n Math.PI\n : animation.sourceRotation +\n progress *\n (animation.targetRotation - animation.sourceRotation);\n if (animation.anchor) {\n const constrainedRotation = this.constraints_.rotation(\n rotation,\n true\n );\n this.targetCenter_ = this.calculateCenterRotate(\n constrainedRotation,\n animation.anchor\n );\n }\n this.nextRotation_ = animation.targetRotation;\n this.targetRotation_ = rotation;\n }\n this.applyTargetState_(true);\n more = true;\n if (!animation.complete) {\n break;\n }\n }\n if (seriesComplete) {\n this.animations_[i] = null;\n this.setHint(ViewHint.ANIMATING, -1);\n this.nextCenter_ = null;\n this.nextResolution_ = NaN;\n this.nextRotation_ = NaN;\n const callback = series[0].callback;\n if (callback) {\n animationCallback(callback, true);\n }\n }\n }\n // prune completed series\n this.animations_ = this.animations_.filter(Boolean);\n if (more && this.updateAnimationKey_ === undefined) {\n this.updateAnimationKey_ = requestAnimationFrame(\n this.updateAnimations_.bind(this)\n );\n }\n }\n\n /**\n * @param {number} rotation Target rotation.\n * @param {import(\"./coordinate.js\").Coordinate} anchor Rotation anchor.\n * @return {import(\"./coordinate.js\").Coordinate|undefined} Center for rotation and anchor.\n */\n calculateCenterRotate(rotation, anchor) {\n let center;\n const currentCenter = this.getCenterInternal();\n if (currentCenter !== undefined) {\n center = [currentCenter[0] - anchor[0], currentCenter[1] - anchor[1]];\n rotateCoordinate(center, rotation - this.getRotation());\n addCoordinate(center, anchor);\n }\n return center;\n }\n\n /**\n * @param {number} resolution Target resolution.\n * @param {import(\"./coordinate.js\").Coordinate} anchor Zoom anchor.\n * @return {import(\"./coordinate.js\").Coordinate|undefined} Center for resolution and anchor.\n */\n calculateCenterZoom(resolution, anchor) {\n let center;\n const currentCenter = this.getCenterInternal();\n const currentResolution = this.getResolution();\n if (currentCenter !== undefined && currentResolution !== undefined) {\n const x =\n anchor[0] -\n (resolution * (anchor[0] - currentCenter[0])) / currentResolution;\n const y =\n anchor[1] -\n (resolution * (anchor[1] - currentCenter[1])) / currentResolution;\n center = [x, y];\n }\n return center;\n }\n\n /**\n * Returns the current viewport size.\n * @private\n * @param {number} [rotation] Take into account the rotation of the viewport when giving the size\n * @return {import(\"./size.js\").Size} Viewport size or `[100, 100]` when no viewport is found.\n */\n getViewportSize_(rotation) {\n const size = this.viewportSize_;\n if (rotation) {\n const w = size[0];\n const h = size[1];\n return [\n Math.abs(w * Math.cos(rotation)) + Math.abs(h * Math.sin(rotation)),\n Math.abs(w * Math.sin(rotation)) + Math.abs(h * Math.cos(rotation)),\n ];\n }\n return size;\n }\n\n /**\n * Stores the viewport size on the view. The viewport size is not read every time from the DOM\n * to avoid performance hit and layout reflow.\n * This should be done on map size change.\n * Note: the constraints are not resolved during an animation to avoid stopping it\n * @param {import(\"./size.js\").Size} [size] Viewport size; if undefined, [100, 100] is assumed\n */\n setViewportSize(size) {\n this.viewportSize_ = Array.isArray(size) ? size.slice() : [100, 100];\n if (!this.getAnimating()) {\n this.resolveConstraints(0);\n }\n }\n\n /**\n * Get the view center.\n * @return {import(\"./coordinate.js\").Coordinate|undefined} The center of the view.\n * @observable\n * @api\n */\n getCenter() {\n const center = this.getCenterInternal();\n if (!center) {\n return center;\n }\n return toUserCoordinate(center, this.getProjection());\n }\n\n /**\n * Get the view center without transforming to user projection.\n * @return {import(\"./coordinate.js\").Coordinate|undefined} The center of the view.\n */\n getCenterInternal() {\n return /** @type {import(\"./coordinate.js\").Coordinate|undefined} */ (\n this.get(ViewProperty.CENTER)\n );\n }\n\n /**\n * @return {Constraints} Constraints.\n */\n getConstraints() {\n return this.constraints_;\n }\n\n /**\n * @return {boolean} Resolution constraint is set\n */\n getConstrainResolution() {\n return this.get('constrainResolution');\n }\n\n /**\n * @param {Array} [hints] Destination array.\n * @return {Array} Hint.\n */\n getHints(hints) {\n if (hints !== undefined) {\n hints[0] = this.hints_[0];\n hints[1] = this.hints_[1];\n return hints;\n }\n return this.hints_.slice();\n }\n\n /**\n * Calculate the extent for the current view state and the passed size.\n * The size is the pixel dimensions of the box into which the calculated extent\n * should fit. In most cases you want to get the extent of the entire map,\n * that is `map.getSize()`.\n * @param {import(\"./size.js\").Size} [size] Box pixel size. If not provided, the size\n * of the map that uses this view will be used.\n * @return {import(\"./extent.js\").Extent} Extent.\n * @api\n */\n calculateExtent(size) {\n const extent = this.calculateExtentInternal(size);\n return toUserExtent(extent, this.getProjection());\n }\n\n /**\n * @param {import(\"./size.js\").Size} [size] Box pixel size. If not provided,\n * the map's last known viewport size will be used.\n * @return {import(\"./extent.js\").Extent} Extent.\n */\n calculateExtentInternal(size) {\n size = size || this.getViewportSizeMinusPadding_();\n const center = /** @type {!import(\"./coordinate.js\").Coordinate} */ (\n this.getCenterInternal()\n );\n assert(center, 1); // The view center is not defined\n const resolution = /** @type {!number} */ (this.getResolution());\n assert(resolution !== undefined, 2); // The view resolution is not defined\n const rotation = /** @type {!number} */ (this.getRotation());\n assert(rotation !== undefined, 3); // The view rotation is not defined\n\n return getForViewAndSize(center, resolution, rotation, size);\n }\n\n /**\n * Get the maximum resolution of the view.\n * @return {number} The maximum resolution of the view.\n * @api\n */\n getMaxResolution() {\n return this.maxResolution_;\n }\n\n /**\n * Get the minimum resolution of the view.\n * @return {number} The minimum resolution of the view.\n * @api\n */\n getMinResolution() {\n return this.minResolution_;\n }\n\n /**\n * Get the maximum zoom level for the view.\n * @return {number} The maximum zoom level.\n * @api\n */\n getMaxZoom() {\n return /** @type {number} */ (\n this.getZoomForResolution(this.minResolution_)\n );\n }\n\n /**\n * Set a new maximum zoom level for the view.\n * @param {number} zoom The maximum zoom level.\n * @api\n */\n setMaxZoom(zoom) {\n this.applyOptions_(this.getUpdatedOptions_({maxZoom: zoom}));\n }\n\n /**\n * Get the minimum zoom level for the view.\n * @return {number} The minimum zoom level.\n * @api\n */\n getMinZoom() {\n return /** @type {number} */ (\n this.getZoomForResolution(this.maxResolution_)\n );\n }\n\n /**\n * Set a new minimum zoom level for the view.\n * @param {number} zoom The minimum zoom level.\n * @api\n */\n setMinZoom(zoom) {\n this.applyOptions_(this.getUpdatedOptions_({minZoom: zoom}));\n }\n\n /**\n * Set whether the view should allow intermediary zoom levels.\n * @param {boolean} enabled Whether the resolution is constrained.\n * @api\n */\n setConstrainResolution(enabled) {\n this.applyOptions_(this.getUpdatedOptions_({constrainResolution: enabled}));\n }\n\n /**\n * Get the view projection.\n * @return {import(\"./proj/Projection.js\").default} The projection of the view.\n * @api\n */\n getProjection() {\n return this.projection_;\n }\n\n /**\n * Get the view resolution.\n * @return {number|undefined} The resolution of the view.\n * @observable\n * @api\n */\n getResolution() {\n return /** @type {number|undefined} */ (this.get(ViewProperty.RESOLUTION));\n }\n\n /**\n * Get the resolutions for the view. This returns the array of resolutions\n * passed to the constructor of the View, or undefined if none were given.\n * @return {Array|undefined} The resolutions of the view.\n * @api\n */\n getResolutions() {\n return this.resolutions_;\n }\n\n /**\n * Get the resolution for a provided extent (in map units) and size (in pixels).\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {import(\"./size.js\").Size} [size] Box pixel size.\n * @return {number} The resolution at which the provided extent will render at\n * the given size.\n * @api\n */\n getResolutionForExtent(extent, size) {\n return this.getResolutionForExtentInternal(\n fromUserExtent(extent, this.getProjection()),\n size\n );\n }\n\n /**\n * Get the resolution for a provided extent (in map units) and size (in pixels).\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {import(\"./size.js\").Size} [size] Box pixel size.\n * @return {number} The resolution at which the provided extent will render at\n * the given size.\n */\n getResolutionForExtentInternal(extent, size) {\n size = size || this.getViewportSizeMinusPadding_();\n const xResolution = getWidth(extent) / size[0];\n const yResolution = getHeight(extent) / size[1];\n return Math.max(xResolution, yResolution);\n }\n\n /**\n * Return a function that returns a value between 0 and 1 for a\n * resolution. Exponential scaling is assumed.\n * @param {number} [power] Power.\n * @return {function(number): number} Resolution for value function.\n */\n getResolutionForValueFunction(power) {\n power = power || 2;\n const maxResolution = this.getConstrainedResolution(this.maxResolution_);\n const minResolution = this.minResolution_;\n const max = Math.log(maxResolution / minResolution) / Math.log(power);\n return (\n /**\n * @param {number} value Value.\n * @return {number} Resolution.\n */\n function (value) {\n const resolution = maxResolution / Math.pow(power, value * max);\n return resolution;\n }\n );\n }\n\n /**\n * Get the view rotation.\n * @return {number} The rotation of the view in radians.\n * @observable\n * @api\n */\n getRotation() {\n return /** @type {number} */ (this.get(ViewProperty.ROTATION));\n }\n\n /**\n * Return a function that returns a resolution for a value between\n * 0 and 1. Exponential scaling is assumed.\n * @param {number} [power] Power.\n * @return {function(number): number} Value for resolution function.\n */\n getValueForResolutionFunction(power) {\n const logPower = Math.log(power || 2);\n const maxResolution = this.getConstrainedResolution(this.maxResolution_);\n const minResolution = this.minResolution_;\n const max = Math.log(maxResolution / minResolution) / logPower;\n return (\n /**\n * @param {number} resolution Resolution.\n * @return {number} Value.\n */\n function (resolution) {\n const value = Math.log(maxResolution / resolution) / logPower / max;\n return value;\n }\n );\n }\n\n /**\n * Returns the size of the viewport minus padding.\n * @private\n * @param {number} [rotation] Take into account the rotation of the viewport when giving the size\n * @return {import(\"./size.js\").Size} Viewport size reduced by the padding.\n */\n getViewportSizeMinusPadding_(rotation) {\n let size = this.getViewportSize_(rotation);\n const padding = this.padding_;\n if (padding) {\n size = [\n size[0] - padding[1] - padding[3],\n size[1] - padding[0] - padding[2],\n ];\n }\n return size;\n }\n\n /**\n * @return {State} View state.\n */\n getState() {\n const projection = this.getProjection();\n const resolution = this.getResolution();\n const rotation = this.getRotation();\n let center = /** @type {import(\"./coordinate.js\").Coordinate} */ (\n this.getCenterInternal()\n );\n const padding = this.padding_;\n if (padding) {\n const reducedSize = this.getViewportSizeMinusPadding_();\n center = calculateCenterOn(\n center,\n this.getViewportSize_(),\n [reducedSize[0] / 2 + padding[3], reducedSize[1] / 2 + padding[0]],\n resolution,\n rotation\n );\n }\n return {\n center: center.slice(0),\n projection: projection !== undefined ? projection : null,\n resolution: resolution,\n nextCenter: this.nextCenter_,\n nextResolution: this.nextResolution_,\n nextRotation: this.nextRotation_,\n rotation: rotation,\n zoom: this.getZoom(),\n };\n }\n\n /**\n * Get the current zoom level. This method may return non-integer zoom levels\n * if the view does not constrain the resolution, or if an interaction or\n * animation is underway.\n * @return {number|undefined} Zoom.\n * @api\n */\n getZoom() {\n let zoom;\n const resolution = this.getResolution();\n if (resolution !== undefined) {\n zoom = this.getZoomForResolution(resolution);\n }\n return zoom;\n }\n\n /**\n * Get the zoom level for a resolution.\n * @param {number} resolution The resolution.\n * @return {number|undefined} The zoom level for the provided resolution.\n * @api\n */\n getZoomForResolution(resolution) {\n let offset = this.minZoom_ || 0;\n let max, zoomFactor;\n if (this.resolutions_) {\n const nearest = linearFindNearest(this.resolutions_, resolution, 1);\n offset = nearest;\n max = this.resolutions_[nearest];\n if (nearest == this.resolutions_.length - 1) {\n zoomFactor = 2;\n } else {\n zoomFactor = max / this.resolutions_[nearest + 1];\n }\n } else {\n max = this.maxResolution_;\n zoomFactor = this.zoomFactor_;\n }\n return offset + Math.log(max / resolution) / Math.log(zoomFactor);\n }\n\n /**\n * Get the resolution for a zoom level.\n * @param {number} zoom Zoom level.\n * @return {number} The view resolution for the provided zoom level.\n * @api\n */\n getResolutionForZoom(zoom) {\n if (this.resolutions_) {\n if (this.resolutions_.length <= 1) {\n return 0;\n }\n const baseLevel = clamp(\n Math.floor(zoom),\n 0,\n this.resolutions_.length - 2\n );\n const zoomFactor =\n this.resolutions_[baseLevel] / this.resolutions_[baseLevel + 1];\n return (\n this.resolutions_[baseLevel] /\n Math.pow(zoomFactor, clamp(zoom - baseLevel, 0, 1))\n );\n }\n return (\n this.maxResolution_ / Math.pow(this.zoomFactor_, zoom - this.minZoom_)\n );\n }\n\n /**\n * Fit the given geometry or extent based on the given map size and border.\n * The size is pixel dimensions of the box to fit the extent into.\n * In most cases you will want to use the map size, that is `map.getSize()`.\n * Takes care of the map angle.\n * @param {import(\"./geom/SimpleGeometry.js\").default|import(\"./extent.js\").Extent} geometryOrExtent The geometry or\n * extent to fit the view to.\n * @param {FitOptions} [options] Options.\n * @api\n */\n fit(geometryOrExtent, options) {\n /** @type {import(\"./geom/SimpleGeometry.js\").default} */\n let geometry;\n assert(\n Array.isArray(geometryOrExtent) ||\n typeof (/** @type {?} */ (geometryOrExtent).getSimplifiedGeometry) ===\n 'function',\n 24\n ); // Invalid extent or geometry provided as `geometry`\n if (Array.isArray(geometryOrExtent)) {\n assert(!isEmpty(geometryOrExtent), 25); // Cannot fit empty extent provided as `geometry`\n const extent = fromUserExtent(geometryOrExtent, this.getProjection());\n geometry = polygonFromExtent(extent);\n } else if (geometryOrExtent.getType() === 'Circle') {\n const extent = fromUserExtent(\n geometryOrExtent.getExtent(),\n this.getProjection()\n );\n geometry = polygonFromExtent(extent);\n geometry.rotate(this.getRotation(), getCenter(extent));\n } else {\n const userProjection = getUserProjection();\n if (userProjection) {\n geometry = /** @type {import(\"./geom/SimpleGeometry.js\").default} */ (\n geometryOrExtent\n .clone()\n .transform(userProjection, this.getProjection())\n );\n } else {\n geometry = geometryOrExtent;\n }\n }\n\n this.fitInternal(geometry, options);\n }\n\n /**\n * Calculate rotated extent\n * @param {import(\"./geom/SimpleGeometry.js\").default} geometry The geometry.\n * @return {import(\"./extent\").Extent} The rotated extent for the geometry.\n */\n rotatedExtentForGeometry(geometry) {\n const rotation = this.getRotation();\n const cosAngle = Math.cos(rotation);\n const sinAngle = Math.sin(-rotation);\n const coords = geometry.getFlatCoordinates();\n const stride = geometry.getStride();\n let minRotX = +Infinity;\n let minRotY = +Infinity;\n let maxRotX = -Infinity;\n let maxRotY = -Infinity;\n for (let i = 0, ii = coords.length; i < ii; i += stride) {\n const rotX = coords[i] * cosAngle - coords[i + 1] * sinAngle;\n const rotY = coords[i] * sinAngle + coords[i + 1] * cosAngle;\n minRotX = Math.min(minRotX, rotX);\n minRotY = Math.min(minRotY, rotY);\n maxRotX = Math.max(maxRotX, rotX);\n maxRotY = Math.max(maxRotY, rotY);\n }\n return [minRotX, minRotY, maxRotX, maxRotY];\n }\n\n /**\n * @param {import(\"./geom/SimpleGeometry.js\").default} geometry The geometry.\n * @param {FitOptions} [options] Options.\n */\n fitInternal(geometry, options) {\n options = options || {};\n let size = options.size;\n if (!size) {\n size = this.getViewportSizeMinusPadding_();\n }\n const padding =\n options.padding !== undefined ? options.padding : [0, 0, 0, 0];\n const nearest = options.nearest !== undefined ? options.nearest : false;\n let minResolution;\n if (options.minResolution !== undefined) {\n minResolution = options.minResolution;\n } else if (options.maxZoom !== undefined) {\n minResolution = this.getResolutionForZoom(options.maxZoom);\n } else {\n minResolution = 0;\n }\n\n const rotatedExtent = this.rotatedExtentForGeometry(geometry);\n\n // calculate resolution\n let resolution = this.getResolutionForExtentInternal(rotatedExtent, [\n size[0] - padding[1] - padding[3],\n size[1] - padding[0] - padding[2],\n ]);\n resolution = isNaN(resolution)\n ? minResolution\n : Math.max(resolution, minResolution);\n resolution = this.getConstrainedResolution(resolution, nearest ? 0 : 1);\n\n // calculate center\n const rotation = this.getRotation();\n const sinAngle = Math.sin(rotation);\n const cosAngle = Math.cos(rotation);\n const centerRot = getCenter(rotatedExtent);\n centerRot[0] += ((padding[1] - padding[3]) / 2) * resolution;\n centerRot[1] += ((padding[0] - padding[2]) / 2) * resolution;\n const centerX = centerRot[0] * cosAngle - centerRot[1] * sinAngle;\n const centerY = centerRot[1] * cosAngle + centerRot[0] * sinAngle;\n const center = this.getConstrainedCenter([centerX, centerY], resolution);\n const callback = options.callback ? options.callback : VOID;\n\n if (options.duration !== undefined) {\n this.animateInternal(\n {\n resolution: resolution,\n center: center,\n duration: options.duration,\n easing: options.easing,\n },\n callback\n );\n } else {\n this.targetResolution_ = resolution;\n this.targetCenter_ = center;\n this.applyTargetState_(false, true);\n animationCallback(callback, true);\n }\n }\n\n /**\n * Center on coordinate and view position.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {import(\"./size.js\").Size} size Box pixel size.\n * @param {import(\"./pixel.js\").Pixel} position Position on the view to center on.\n * @api\n */\n centerOn(coordinate, size, position) {\n this.centerOnInternal(\n fromUserCoordinate(coordinate, this.getProjection()),\n size,\n position\n );\n }\n\n /**\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {import(\"./size.js\").Size} size Box pixel size.\n * @param {import(\"./pixel.js\").Pixel} position Position on the view to center on.\n */\n centerOnInternal(coordinate, size, position) {\n this.setCenterInternal(\n calculateCenterOn(\n coordinate,\n size,\n position,\n this.getResolution(),\n this.getRotation()\n )\n );\n }\n\n /**\n * Calculates the shift between map and viewport center.\n * @param {import(\"./coordinate.js\").Coordinate} center Center.\n * @param {number} resolution Resolution.\n * @param {number} rotation Rotation.\n * @param {import(\"./size.js\").Size} size Size.\n * @return {Array|undefined} Center shift.\n */\n calculateCenterShift(center, resolution, rotation, size) {\n let centerShift;\n const padding = this.padding_;\n if (padding && center) {\n const reducedSize = this.getViewportSizeMinusPadding_(-rotation);\n const shiftedCenter = calculateCenterOn(\n center,\n size,\n [reducedSize[0] / 2 + padding[3], reducedSize[1] / 2 + padding[0]],\n resolution,\n rotation\n );\n centerShift = [\n center[0] - shiftedCenter[0],\n center[1] - shiftedCenter[1],\n ];\n }\n return centerShift;\n }\n\n /**\n * @return {boolean} Is defined.\n */\n isDef() {\n return !!this.getCenterInternal() && this.getResolution() !== undefined;\n }\n\n /**\n * Adds relative coordinates to the center of the view. Any extent constraint will apply.\n * @param {import(\"./coordinate.js\").Coordinate} deltaCoordinates Relative value to add.\n * @api\n */\n adjustCenter(deltaCoordinates) {\n const center = toUserCoordinate(this.targetCenter_, this.getProjection());\n this.setCenter([\n center[0] + deltaCoordinates[0],\n center[1] + deltaCoordinates[1],\n ]);\n }\n\n /**\n * Adds relative coordinates to the center of the view. Any extent constraint will apply.\n * @param {import(\"./coordinate.js\").Coordinate} deltaCoordinates Relative value to add.\n */\n adjustCenterInternal(deltaCoordinates) {\n const center = this.targetCenter_;\n this.setCenterInternal([\n center[0] + deltaCoordinates[0],\n center[1] + deltaCoordinates[1],\n ]);\n }\n\n /**\n * Multiply the view resolution by a ratio, optionally using an anchor. Any resolution\n * constraint will apply.\n * @param {number} ratio The ratio to apply on the view resolution.\n * @param {import(\"./coordinate.js\").Coordinate} [anchor] The origin of the transformation.\n * @api\n */\n adjustResolution(ratio, anchor) {\n anchor = anchor && fromUserCoordinate(anchor, this.getProjection());\n this.adjustResolutionInternal(ratio, anchor);\n }\n\n /**\n * Multiply the view resolution by a ratio, optionally using an anchor. Any resolution\n * constraint will apply.\n * @param {number} ratio The ratio to apply on the view resolution.\n * @param {import(\"./coordinate.js\").Coordinate} [anchor] The origin of the transformation.\n */\n adjustResolutionInternal(ratio, anchor) {\n const isMoving = this.getAnimating() || this.getInteracting();\n const size = this.getViewportSize_(this.getRotation());\n const newResolution = this.constraints_.resolution(\n this.targetResolution_ * ratio,\n 0,\n size,\n isMoving\n );\n\n if (anchor) {\n this.targetCenter_ = this.calculateCenterZoom(newResolution, anchor);\n }\n\n this.targetResolution_ *= ratio;\n this.applyTargetState_();\n }\n\n /**\n * Adds a value to the view zoom level, optionally using an anchor. Any resolution\n * constraint will apply.\n * @param {number} delta Relative value to add to the zoom level.\n * @param {import(\"./coordinate.js\").Coordinate} [anchor] The origin of the transformation.\n * @api\n */\n adjustZoom(delta, anchor) {\n this.adjustResolution(Math.pow(this.zoomFactor_, -delta), anchor);\n }\n\n /**\n * Adds a value to the view rotation, optionally using an anchor. Any rotation\n * constraint will apply.\n * @param {number} delta Relative value to add to the zoom rotation, in radians.\n * @param {import(\"./coordinate.js\").Coordinate} [anchor] The rotation center.\n * @api\n */\n adjustRotation(delta, anchor) {\n if (anchor) {\n anchor = fromUserCoordinate(anchor, this.getProjection());\n }\n this.adjustRotationInternal(delta, anchor);\n }\n\n /**\n * @param {number} delta Relative value to add to the zoom rotation, in radians.\n * @param {import(\"./coordinate.js\").Coordinate} [anchor] The rotation center.\n */\n adjustRotationInternal(delta, anchor) {\n const isMoving = this.getAnimating() || this.getInteracting();\n const newRotation = this.constraints_.rotation(\n this.targetRotation_ + delta,\n isMoving\n );\n if (anchor) {\n this.targetCenter_ = this.calculateCenterRotate(newRotation, anchor);\n }\n this.targetRotation_ += delta;\n this.applyTargetState_();\n }\n\n /**\n * Set the center of the current view. Any extent constraint will apply.\n * @param {import(\"./coordinate.js\").Coordinate|undefined} center The center of the view.\n * @observable\n * @api\n */\n setCenter(center) {\n this.setCenterInternal(\n center ? fromUserCoordinate(center, this.getProjection()) : center\n );\n }\n\n /**\n * Set the center using the view projection (not the user projection).\n * @param {import(\"./coordinate.js\").Coordinate|undefined} center The center of the view.\n */\n setCenterInternal(center) {\n this.targetCenter_ = center;\n this.applyTargetState_();\n }\n\n /**\n * @param {import(\"./ViewHint.js\").default} hint Hint.\n * @param {number} delta Delta.\n * @return {number} New value.\n */\n setHint(hint, delta) {\n this.hints_[hint] += delta;\n this.changed();\n return this.hints_[hint];\n }\n\n /**\n * Set the resolution for this view. Any resolution constraint will apply.\n * @param {number|undefined} resolution The resolution of the view.\n * @observable\n * @api\n */\n setResolution(resolution) {\n this.targetResolution_ = resolution;\n this.applyTargetState_();\n }\n\n /**\n * Set the rotation for this view. Any rotation constraint will apply.\n * @param {number} rotation The rotation of the view in radians.\n * @observable\n * @api\n */\n setRotation(rotation) {\n this.targetRotation_ = rotation;\n this.applyTargetState_();\n }\n\n /**\n * Zoom to a specific zoom level. Any resolution constrain will apply.\n * @param {number} zoom Zoom level.\n * @api\n */\n setZoom(zoom) {\n this.setResolution(this.getResolutionForZoom(zoom));\n }\n\n /**\n * Recompute rotation/resolution/center based on target values.\n * Note: we have to compute rotation first, then resolution and center considering that\n * parameters can influence one another in case a view extent constraint is present.\n * @param {boolean} [doNotCancelAnims] Do not cancel animations.\n * @param {boolean} [forceMoving] Apply constraints as if the view is moving.\n * @private\n */\n applyTargetState_(doNotCancelAnims, forceMoving) {\n const isMoving =\n this.getAnimating() || this.getInteracting() || forceMoving;\n\n // compute rotation\n const newRotation = this.constraints_.rotation(\n this.targetRotation_,\n isMoving\n );\n const size = this.getViewportSize_(newRotation);\n const newResolution = this.constraints_.resolution(\n this.targetResolution_,\n 0,\n size,\n isMoving\n );\n const newCenter = this.constraints_.center(\n this.targetCenter_,\n newResolution,\n size,\n isMoving,\n this.calculateCenterShift(\n this.targetCenter_,\n newResolution,\n newRotation,\n size\n )\n );\n\n if (this.get(ViewProperty.ROTATION) !== newRotation) {\n this.set(ViewProperty.ROTATION, newRotation);\n }\n if (this.get(ViewProperty.RESOLUTION) !== newResolution) {\n this.set(ViewProperty.RESOLUTION, newResolution);\n this.set('zoom', this.getZoom(), true);\n }\n if (\n !newCenter ||\n !this.get(ViewProperty.CENTER) ||\n !equals(this.get(ViewProperty.CENTER), newCenter)\n ) {\n this.set(ViewProperty.CENTER, newCenter);\n }\n\n if (this.getAnimating() && !doNotCancelAnims) {\n this.cancelAnimations();\n }\n this.cancelAnchor_ = undefined;\n }\n\n /**\n * If any constraints need to be applied, an animation will be triggered.\n * This is typically done on interaction end.\n * Note: calling this with a duration of 0 will apply the constrained values straight away,\n * without animation.\n * @param {number} [duration] The animation duration in ms.\n * @param {number} [resolutionDirection] Which direction to zoom.\n * @param {import(\"./coordinate.js\").Coordinate} [anchor] The origin of the transformation.\n */\n resolveConstraints(duration, resolutionDirection, anchor) {\n duration = duration !== undefined ? duration : 200;\n const direction = resolutionDirection || 0;\n\n const newRotation = this.constraints_.rotation(this.targetRotation_);\n const size = this.getViewportSize_(newRotation);\n const newResolution = this.constraints_.resolution(\n this.targetResolution_,\n direction,\n size\n );\n const newCenter = this.constraints_.center(\n this.targetCenter_,\n newResolution,\n size,\n false,\n this.calculateCenterShift(\n this.targetCenter_,\n newResolution,\n newRotation,\n size\n )\n );\n\n if (duration === 0 && !this.cancelAnchor_) {\n this.targetResolution_ = newResolution;\n this.targetRotation_ = newRotation;\n this.targetCenter_ = newCenter;\n this.applyTargetState_();\n return;\n }\n\n anchor = anchor || (duration === 0 ? this.cancelAnchor_ : undefined);\n this.cancelAnchor_ = undefined;\n\n if (\n this.getResolution() !== newResolution ||\n this.getRotation() !== newRotation ||\n !this.getCenterInternal() ||\n !equals(this.getCenterInternal(), newCenter)\n ) {\n if (this.getAnimating()) {\n this.cancelAnimations();\n }\n\n this.animateInternal({\n rotation: newRotation,\n center: newCenter,\n resolution: newResolution,\n duration: duration,\n easing: easeOut,\n anchor: anchor,\n });\n }\n }\n\n /**\n * Notify the View that an interaction has started.\n * The view state will be resolved to a stable one if needed\n * (depending on its constraints).\n * @api\n */\n beginInteraction() {\n this.resolveConstraints(0);\n\n this.setHint(ViewHint.INTERACTING, 1);\n }\n\n /**\n * Notify the View that an interaction has ended. The view state will be resolved\n * to a stable one if needed (depending on its constraints).\n * @param {number} [duration] Animation duration in ms.\n * @param {number} [resolutionDirection] Which direction to zoom.\n * @param {import(\"./coordinate.js\").Coordinate} [anchor] The origin of the transformation.\n * @api\n */\n endInteraction(duration, resolutionDirection, anchor) {\n anchor = anchor && fromUserCoordinate(anchor, this.getProjection());\n this.endInteractionInternal(duration, resolutionDirection, anchor);\n }\n\n /**\n * Notify the View that an interaction has ended. The view state will be resolved\n * to a stable one if needed (depending on its constraints).\n * @param {number} [duration] Animation duration in ms.\n * @param {number} [resolutionDirection] Which direction to zoom.\n * @param {import(\"./coordinate.js\").Coordinate} [anchor] The origin of the transformation.\n */\n endInteractionInternal(duration, resolutionDirection, anchor) {\n this.setHint(ViewHint.INTERACTING, -1);\n\n this.resolveConstraints(duration, resolutionDirection, anchor);\n }\n\n /**\n * Get a valid position for the view center according to the current constraints.\n * @param {import(\"./coordinate.js\").Coordinate|undefined} targetCenter Target center position.\n * @param {number} [targetResolution] Target resolution. If not supplied, the current one will be used.\n * This is useful to guess a valid center position at a different zoom level.\n * @return {import(\"./coordinate.js\").Coordinate|undefined} Valid center position.\n */\n getConstrainedCenter(targetCenter, targetResolution) {\n const size = this.getViewportSize_(this.getRotation());\n return this.constraints_.center(\n targetCenter,\n targetResolution || this.getResolution(),\n size\n );\n }\n\n /**\n * Get a valid zoom level according to the current view constraints.\n * @param {number|undefined} targetZoom Target zoom.\n * @param {number} [direction=0] Indicate which resolution should be used\n * by a renderer if the view resolution does not match any resolution of the tile source.\n * If 0, the nearest resolution will be used. If 1, the nearest lower resolution\n * will be used. If -1, the nearest higher resolution will be used.\n * @return {number|undefined} Valid zoom level.\n */\n getConstrainedZoom(targetZoom, direction) {\n const targetRes = this.getResolutionForZoom(targetZoom);\n return this.getZoomForResolution(\n this.getConstrainedResolution(targetRes, direction)\n );\n }\n\n /**\n * Get a valid resolution according to the current view constraints.\n * @param {number|undefined} targetResolution Target resolution.\n * @param {number} [direction=0] Indicate which resolution should be used\n * by a renderer if the view resolution does not match any resolution of the tile source.\n * If 0, the nearest resolution will be used. If 1, the nearest lower resolution\n * will be used. If -1, the nearest higher resolution will be used.\n * @return {number|undefined} Valid resolution.\n */\n getConstrainedResolution(targetResolution, direction) {\n direction = direction || 0;\n const size = this.getViewportSize_(this.getRotation());\n\n return this.constraints_.resolution(targetResolution, direction, size);\n }\n}\n\n/**\n * @param {Function} callback Callback.\n * @param {*} returnValue Return value.\n */\nfunction animationCallback(callback, returnValue) {\n setTimeout(function () {\n callback(returnValue);\n }, 0);\n}\n\n/**\n * @param {ViewOptions} options View options.\n * @return {import(\"./centerconstraint.js\").Type} The constraint.\n */\nexport function createCenterConstraint(options) {\n if (options.extent !== undefined) {\n const smooth =\n options.smoothExtentConstraint !== undefined\n ? options.smoothExtentConstraint\n : true;\n return createExtent(options.extent, options.constrainOnlyCenter, smooth);\n }\n\n const projection = createProjection(options.projection, 'EPSG:3857');\n if (options.multiWorld !== true && projection.isGlobal()) {\n const extent = projection.getExtent().slice();\n extent[0] = -Infinity;\n extent[2] = Infinity;\n return createExtent(extent, false, false);\n }\n\n return centerNone;\n}\n\n/**\n * @param {ViewOptions} options View options.\n * @return {{constraint: import(\"./resolutionconstraint.js\").Type, maxResolution: number,\n * minResolution: number, minZoom: number, zoomFactor: number}} The constraint.\n */\nexport function createResolutionConstraint(options) {\n let resolutionConstraint;\n let maxResolution;\n let minResolution;\n\n // TODO: move these to be ol constants\n // see https://github.com/openlayers/openlayers/issues/2076\n const defaultMaxZoom = 28;\n const defaultZoomFactor = 2;\n\n let minZoom =\n options.minZoom !== undefined ? options.minZoom : DEFAULT_MIN_ZOOM;\n\n let maxZoom =\n options.maxZoom !== undefined ? options.maxZoom : defaultMaxZoom;\n\n const zoomFactor =\n options.zoomFactor !== undefined ? options.zoomFactor : defaultZoomFactor;\n\n const multiWorld =\n options.multiWorld !== undefined ? options.multiWorld : false;\n\n const smooth =\n options.smoothResolutionConstraint !== undefined\n ? options.smoothResolutionConstraint\n : true;\n\n const showFullExtent =\n options.showFullExtent !== undefined ? options.showFullExtent : false;\n\n const projection = createProjection(options.projection, 'EPSG:3857');\n const projExtent = projection.getExtent();\n let constrainOnlyCenter = options.constrainOnlyCenter;\n let extent = options.extent;\n if (!multiWorld && !extent && projection.isGlobal()) {\n constrainOnlyCenter = false;\n extent = projExtent;\n }\n\n if (options.resolutions !== undefined) {\n const resolutions = options.resolutions;\n maxResolution = resolutions[minZoom];\n minResolution =\n resolutions[maxZoom] !== undefined\n ? resolutions[maxZoom]\n : resolutions[resolutions.length - 1];\n\n if (options.constrainResolution) {\n resolutionConstraint = createSnapToResolutions(\n resolutions,\n smooth,\n !constrainOnlyCenter && extent,\n showFullExtent\n );\n } else {\n resolutionConstraint = createMinMaxResolution(\n maxResolution,\n minResolution,\n smooth,\n !constrainOnlyCenter && extent,\n showFullExtent\n );\n }\n } else {\n // calculate the default min and max resolution\n const size = !projExtent\n ? // use an extent that can fit the whole world if need be\n (360 * METERS_PER_UNIT.degrees) / projection.getMetersPerUnit()\n : Math.max(getWidth(projExtent), getHeight(projExtent));\n\n const defaultMaxResolution =\n size / DEFAULT_TILE_SIZE / Math.pow(defaultZoomFactor, DEFAULT_MIN_ZOOM);\n\n const defaultMinResolution =\n defaultMaxResolution /\n Math.pow(defaultZoomFactor, defaultMaxZoom - DEFAULT_MIN_ZOOM);\n\n // user provided maxResolution takes precedence\n maxResolution = options.maxResolution;\n if (maxResolution !== undefined) {\n minZoom = 0;\n } else {\n maxResolution = defaultMaxResolution / Math.pow(zoomFactor, minZoom);\n }\n\n // user provided minResolution takes precedence\n minResolution = options.minResolution;\n if (minResolution === undefined) {\n if (options.maxZoom !== undefined) {\n if (options.maxResolution !== undefined) {\n minResolution = maxResolution / Math.pow(zoomFactor, maxZoom);\n } else {\n minResolution = defaultMaxResolution / Math.pow(zoomFactor, maxZoom);\n }\n } else {\n minResolution = defaultMinResolution;\n }\n }\n\n // given discrete zoom levels, minResolution may be different than provided\n maxZoom =\n minZoom +\n Math.floor(\n Math.log(maxResolution / minResolution) / Math.log(zoomFactor)\n );\n minResolution = maxResolution / Math.pow(zoomFactor, maxZoom - minZoom);\n\n if (options.constrainResolution) {\n resolutionConstraint = createSnapToPower(\n zoomFactor,\n maxResolution,\n minResolution,\n smooth,\n !constrainOnlyCenter && extent,\n showFullExtent\n );\n } else {\n resolutionConstraint = createMinMaxResolution(\n maxResolution,\n minResolution,\n smooth,\n !constrainOnlyCenter && extent,\n showFullExtent\n );\n }\n }\n return {\n constraint: resolutionConstraint,\n maxResolution: maxResolution,\n minResolution: minResolution,\n minZoom: minZoom,\n zoomFactor: zoomFactor,\n };\n}\n\n/**\n * @param {ViewOptions} options View options.\n * @return {import(\"./rotationconstraint.js\").Type} Rotation constraint.\n */\nexport function createRotationConstraint(options) {\n const enableRotation =\n options.enableRotation !== undefined ? options.enableRotation : true;\n if (enableRotation) {\n const constrainRotation = options.constrainRotation;\n if (constrainRotation === undefined || constrainRotation === true) {\n return createSnapToZero();\n } else if (constrainRotation === false) {\n return rotationNone;\n } else if (typeof constrainRotation === 'number') {\n return createSnapToN(constrainRotation);\n }\n return rotationNone;\n }\n return disable;\n}\n\n/**\n * Determine if an animation involves no view change.\n * @param {Animation} animation The animation.\n * @return {boolean} The animation involves no view change.\n */\nexport function isNoopAnimation(animation) {\n if (animation.sourceCenter && animation.targetCenter) {\n if (!coordinatesEqual(animation.sourceCenter, animation.targetCenter)) {\n return false;\n }\n }\n if (animation.sourceResolution !== animation.targetResolution) {\n return false;\n }\n if (animation.sourceRotation !== animation.targetRotation) {\n return false;\n }\n return true;\n}\n\n/**\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {import(\"./size.js\").Size} size Box pixel size.\n * @param {import(\"./pixel.js\").Pixel} position Position on the view to center on.\n * @param {number} resolution Resolution.\n * @param {number} rotation Rotation.\n * @return {import(\"./coordinate.js\").Coordinate} Shifted center.\n */\nfunction calculateCenterOn(coordinate, size, position, resolution, rotation) {\n // calculate rotated position\n const cosAngle = Math.cos(-rotation);\n let sinAngle = Math.sin(-rotation);\n let rotX = coordinate[0] * cosAngle - coordinate[1] * sinAngle;\n let rotY = coordinate[1] * cosAngle + coordinate[0] * sinAngle;\n rotX += (size[0] / 2 - position[0]) * resolution;\n rotY += (position[1] - size[1] / 2) * resolution;\n\n // go back to original angle\n sinAngle = -sinAngle; // go back to original rotation\n const centerX = rotX * cosAngle - rotY * sinAngle;\n const centerY = rotY * cosAngle + rotX * sinAngle;\n\n return [centerX, centerY];\n}\n\nexport default View;\n","/**\n * @module ol/control/Control\n */\nimport BaseObject from '../Object.js';\nimport MapEventType from '../MapEventType.js';\nimport {VOID} from '../functions.js';\nimport {listen, unlistenByKey} from '../events.js';\nimport {removeNode} from '../dom.js';\n\n/**\n * @typedef {Object} Options\n * @property {HTMLElement} [element] The element is the control's\n * container element. This only needs to be specified if you're developing\n * a custom control.\n * @property {function(import(\"../MapEvent.js\").default):void} [render] Function called when\n * the control should be re-rendered. This is called in a `requestAnimationFrame`\n * callback.\n * @property {HTMLElement|string} [target] Specify a target if you want\n * the control to be rendered outside of the map's viewport.\n */\n\n/**\n * @classdesc\n * A control is a visible widget with a DOM element in a fixed position on the\n * screen. They can involve user input (buttons), or be informational only;\n * the position is determined using CSS. By default these are placed in the\n * container with CSS class name `ol-overlaycontainer-stopevent`, but can use\n * any outside DOM element.\n *\n * This is the base class for controls. You can use it for simple custom\n * controls by creating the element with listeners, creating an instance:\n * ```js\n * const myControl = new Control({element: myElement});\n * ```\n * and then adding this to the map.\n *\n * The main advantage of having this as a control rather than a simple separate\n * DOM element is that preventing propagation is handled for you. Controls\n * will also be objects in a {@link module:ol/Collection~Collection}, so you can use their methods.\n *\n * You can also extend this base for your own control class. See\n * examples/custom-controls for an example of how to do this.\n *\n * @api\n */\nclass Control extends BaseObject {\n /**\n * @param {Options} options Control options.\n */\n constructor(options) {\n super();\n\n const element = options.element;\n if (element && !options.target && !element.style.pointerEvents) {\n element.style.pointerEvents = 'auto';\n }\n\n /**\n * @protected\n * @type {HTMLElement}\n */\n this.element = element ? element : null;\n\n /**\n * @private\n * @type {HTMLElement}\n */\n this.target_ = null;\n\n /**\n * @private\n * @type {import(\"../Map.js\").default|null}\n */\n this.map_ = null;\n\n /**\n * @protected\n * @type {!Array}\n */\n this.listenerKeys = [];\n\n if (options.render) {\n this.render = options.render;\n }\n\n if (options.target) {\n this.setTarget(options.target);\n }\n }\n\n /**\n * Clean up.\n */\n disposeInternal() {\n removeNode(this.element);\n super.disposeInternal();\n }\n\n /**\n * Get the map associated with this control.\n * @return {import(\"../Map.js\").default|null} Map.\n * @api\n */\n getMap() {\n return this.map_;\n }\n\n /**\n * Remove the control from its current map and attach it to the new map.\n * Pass `null` to just remove the control from the current map.\n * Subclasses may set up event handlers to get notified about changes to\n * the map here.\n * @param {import(\"../Map.js\").default|null} map Map.\n * @api\n */\n setMap(map) {\n if (this.map_) {\n removeNode(this.element);\n }\n for (let i = 0, ii = this.listenerKeys.length; i < ii; ++i) {\n unlistenByKey(this.listenerKeys[i]);\n }\n this.listenerKeys.length = 0;\n this.map_ = map;\n if (map) {\n const target = this.target_\n ? this.target_\n : map.getOverlayContainerStopEvent();\n target.appendChild(this.element);\n if (this.render !== VOID) {\n this.listenerKeys.push(\n listen(map, MapEventType.POSTRENDER, this.render, this)\n );\n }\n map.render();\n }\n }\n\n /**\n * Renders the control.\n * @param {import(\"../MapEvent.js\").default} mapEvent Map event.\n * @api\n */\n render(mapEvent) {}\n\n /**\n * This function is used to set a target element for the control. It has no\n * effect if it is called after the control has been added to the map (i.e.\n * after `setMap` is called on the control). If no `target` is set in the\n * options passed to the control constructor and if `setTarget` is not called\n * then the control is added to the map's overlay container.\n * @param {HTMLElement|string} target Target.\n * @api\n */\n setTarget(target) {\n this.target_ =\n typeof target === 'string' ? document.getElementById(target) : target;\n }\n}\n\nexport default Control;\n","/**\n * @module ol/control/Attribution\n */\nimport Control from './Control.js';\nimport EventType from '../events/EventType.js';\nimport {CLASS_COLLAPSED, CLASS_CONTROL, CLASS_UNSELECTABLE} from '../css.js';\nimport {equals} from '../array.js';\nimport {inView} from '../layer/Layer.js';\nimport {removeChildren, replaceNode} from '../dom.js';\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-attribution'] CSS class name.\n * @property {HTMLElement|string} [target] Specify a target if you\n * want the control to be rendered outside of the map's\n * viewport.\n * @property {boolean} [collapsible] Specify if attributions can\n * be collapsed. If not specified, sources control this behavior with their\n * `attributionsCollapsible` setting.\n * @property {boolean} [collapsed=true] Specify if attributions should\n * be collapsed at startup.\n * @property {string} [tipLabel='Attributions'] Text label to use for the button tip.\n * @property {string|HTMLElement} [label='i'] Text label to use for the\n * collapsed attributions button.\n * Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {string} [expandClassName=className + '-expand'] CSS class name for the\n * collapsed attributions button.\n * @property {string|HTMLElement} [collapseLabel='›'] Text label to use\n * for the expanded attributions button.\n * Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {string} [collapseClassName=className + '-collapse'] CSS class name for the\n * expanded attributions button.\n * @property {function(import(\"../MapEvent.js\").default):void} [render] Function called when\n * the control should be re-rendered. This is called in a `requestAnimationFrame`\n * callback.\n */\n\n/**\n * @classdesc\n * Control to show all the attributions associated with the layer sources\n * in the map. This control is one of the default controls included in maps.\n * By default it will show in the bottom right portion of the map, but this can\n * be changed by using a css selector for `.ol-attribution`.\n *\n * @api\n */\nclass Attribution extends Control {\n /**\n * @param {Options} [options] Attribution options.\n */\n constructor(options) {\n options = options ? options : {};\n\n super({\n element: document.createElement('div'),\n render: options.render,\n target: options.target,\n });\n\n /**\n * @private\n * @type {HTMLElement}\n */\n this.ulElement_ = document.createElement('ul');\n\n /**\n * @private\n * @type {boolean}\n */\n this.collapsed_ =\n options.collapsed !== undefined ? options.collapsed : true;\n\n /**\n * @private\n * @type {boolean}\n */\n this.userCollapsed_ = this.collapsed_;\n\n /**\n * @private\n * @type {boolean}\n */\n this.overrideCollapsible_ = options.collapsible !== undefined;\n\n /**\n * @private\n * @type {boolean}\n */\n this.collapsible_ =\n options.collapsible !== undefined ? options.collapsible : true;\n\n if (!this.collapsible_) {\n this.collapsed_ = false;\n }\n\n const className =\n options.className !== undefined ? options.className : 'ol-attribution';\n\n const tipLabel =\n options.tipLabel !== undefined ? options.tipLabel : 'Attributions';\n\n const expandClassName =\n options.expandClassName !== undefined\n ? options.expandClassName\n : className + '-expand';\n\n const collapseLabel =\n options.collapseLabel !== undefined ? options.collapseLabel : '\\u203A';\n\n const collapseClassName =\n options.collapseClassName !== undefined\n ? options.collapseClassName\n : className + '-collapse';\n\n if (typeof collapseLabel === 'string') {\n /**\n * @private\n * @type {HTMLElement}\n */\n this.collapseLabel_ = document.createElement('span');\n this.collapseLabel_.textContent = collapseLabel;\n this.collapseLabel_.className = collapseClassName;\n } else {\n this.collapseLabel_ = collapseLabel;\n }\n\n const label = options.label !== undefined ? options.label : 'i';\n\n if (typeof label === 'string') {\n /**\n * @private\n * @type {HTMLElement}\n */\n this.label_ = document.createElement('span');\n this.label_.textContent = label;\n this.label_.className = expandClassName;\n } else {\n this.label_ = label;\n }\n\n const activeLabel =\n this.collapsible_ && !this.collapsed_ ? this.collapseLabel_ : this.label_;\n\n /**\n * @private\n * @type {HTMLElement}\n */\n this.toggleButton_ = document.createElement('button');\n this.toggleButton_.setAttribute('type', 'button');\n this.toggleButton_.setAttribute('aria-expanded', String(!this.collapsed_));\n this.toggleButton_.title = tipLabel;\n this.toggleButton_.appendChild(activeLabel);\n\n this.toggleButton_.addEventListener(\n EventType.CLICK,\n this.handleClick_.bind(this),\n false\n );\n\n const cssClasses =\n className +\n ' ' +\n CLASS_UNSELECTABLE +\n ' ' +\n CLASS_CONTROL +\n (this.collapsed_ && this.collapsible_ ? ' ' + CLASS_COLLAPSED : '') +\n (this.collapsible_ ? '' : ' ol-uncollapsible');\n const element = this.element;\n element.className = cssClasses;\n element.appendChild(this.toggleButton_);\n element.appendChild(this.ulElement_);\n\n /**\n * A list of currently rendered resolutions.\n * @type {Array}\n * @private\n */\n this.renderedAttributions_ = [];\n\n /**\n * @private\n * @type {boolean}\n */\n this.renderedVisible_ = true;\n }\n\n /**\n * Collect a list of visible attributions and set the collapsible state.\n * @param {import(\"../Map.js\").FrameState} frameState Frame state.\n * @return {Array} Attributions.\n * @private\n */\n collectSourceAttributions_(frameState) {\n /**\n * Used to determine if an attribution already exists.\n * @type {!Object}\n */\n const lookup = {};\n\n /**\n * A list of visible attributions.\n * @type {Array}\n */\n const visibleAttributions = [];\n\n let collapsible = true;\n const layerStatesArray = frameState.layerStatesArray;\n for (let i = 0, ii = layerStatesArray.length; i < ii; ++i) {\n const layerState = layerStatesArray[i];\n if (!inView(layerState, frameState.viewState)) {\n continue;\n }\n\n const source = /** @type {import(\"../layer/Layer.js\").default} */ (\n layerState.layer\n ).getSource();\n if (!source) {\n continue;\n }\n\n const attributionGetter = source.getAttributions();\n if (!attributionGetter) {\n continue;\n }\n\n const attributions = attributionGetter(frameState);\n if (!attributions) {\n continue;\n }\n\n collapsible =\n collapsible && source.getAttributionsCollapsible() !== false;\n\n if (Array.isArray(attributions)) {\n for (let j = 0, jj = attributions.length; j < jj; ++j) {\n if (!(attributions[j] in lookup)) {\n visibleAttributions.push(attributions[j]);\n lookup[attributions[j]] = true;\n }\n }\n } else {\n if (!(attributions in lookup)) {\n visibleAttributions.push(attributions);\n lookup[attributions] = true;\n }\n }\n }\n if (!this.overrideCollapsible_) {\n this.setCollapsible(collapsible);\n }\n return visibleAttributions;\n }\n\n /**\n * @private\n * @param {?import(\"../Map.js\").FrameState} frameState Frame state.\n */\n updateElement_(frameState) {\n if (!frameState) {\n if (this.renderedVisible_) {\n this.element.style.display = 'none';\n this.renderedVisible_ = false;\n }\n return;\n }\n\n const attributions = this.collectSourceAttributions_(frameState);\n\n const visible = attributions.length > 0;\n if (this.renderedVisible_ != visible) {\n this.element.style.display = visible ? '' : 'none';\n this.renderedVisible_ = visible;\n }\n\n if (equals(attributions, this.renderedAttributions_)) {\n return;\n }\n\n removeChildren(this.ulElement_);\n\n // append the attributions\n for (let i = 0, ii = attributions.length; i < ii; ++i) {\n const element = document.createElement('li');\n element.innerHTML = attributions[i];\n this.ulElement_.appendChild(element);\n }\n\n this.renderedAttributions_ = attributions;\n }\n\n /**\n * @param {MouseEvent} event The event to handle\n * @private\n */\n handleClick_(event) {\n event.preventDefault();\n this.handleToggle_();\n this.userCollapsed_ = this.collapsed_;\n }\n\n /**\n * @private\n */\n handleToggle_() {\n this.element.classList.toggle(CLASS_COLLAPSED);\n if (this.collapsed_) {\n replaceNode(this.collapseLabel_, this.label_);\n } else {\n replaceNode(this.label_, this.collapseLabel_);\n }\n this.collapsed_ = !this.collapsed_;\n this.toggleButton_.setAttribute('aria-expanded', String(!this.collapsed_));\n }\n\n /**\n * Return `true` if the attribution is collapsible, `false` otherwise.\n * @return {boolean} True if the widget is collapsible.\n * @api\n */\n getCollapsible() {\n return this.collapsible_;\n }\n\n /**\n * Set whether the attribution should be collapsible.\n * @param {boolean} collapsible True if the widget is collapsible.\n * @api\n */\n setCollapsible(collapsible) {\n if (this.collapsible_ === collapsible) {\n return;\n }\n this.collapsible_ = collapsible;\n this.element.classList.toggle('ol-uncollapsible');\n if (this.userCollapsed_) {\n this.handleToggle_();\n }\n }\n\n /**\n * Collapse or expand the attribution according to the passed parameter. Will\n * not do anything if the attribution isn't collapsible or if the current\n * collapsed state is already the one requested.\n * @param {boolean} collapsed True if the widget is collapsed.\n * @api\n */\n setCollapsed(collapsed) {\n this.userCollapsed_ = collapsed;\n if (!this.collapsible_ || this.collapsed_ === collapsed) {\n return;\n }\n this.handleToggle_();\n }\n\n /**\n * Return `true` when the attribution is currently collapsed or `false`\n * otherwise.\n * @return {boolean} True if the widget is collapsed.\n * @api\n */\n getCollapsed() {\n return this.collapsed_;\n }\n\n /**\n * Update the attribution element.\n * @param {import(\"../MapEvent.js\").default} mapEvent Map event.\n * @override\n */\n render(mapEvent) {\n this.updateElement_(mapEvent.frameState);\n }\n}\n\nexport default Attribution;\n","/**\n * @module ol/control/Rotate\n */\nimport Control from './Control.js';\nimport EventType from '../events/EventType.js';\nimport {CLASS_CONTROL, CLASS_HIDDEN, CLASS_UNSELECTABLE} from '../css.js';\nimport {easeOut} from '../easing.js';\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-rotate'] CSS class name.\n * @property {string|HTMLElement} [label='⇧'] Text label to use for the rotate button.\n * Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {string} [tipLabel='Reset rotation'] Text label to use for the rotate tip.\n * @property {string} [compassClassName='ol-compass'] CSS class name for the compass.\n * @property {number} [duration=250] Animation duration in milliseconds.\n * @property {boolean} [autoHide=true] Hide the control when rotation is 0.\n * @property {function(import(\"../MapEvent.js\").default):void} [render] Function called when the control should\n * be re-rendered. This is called in a `requestAnimationFrame` callback.\n * @property {function():void} [resetNorth] Function called when the control is clicked.\n * This will override the default `resetNorth`.\n * @property {HTMLElement|string} [target] Specify a target if you want the control to be\n * rendered outside of the map's viewport.\n */\n\n/**\n * @classdesc\n * A button control to reset rotation to 0.\n * To style this control use css selector `.ol-rotate`. A `.ol-hidden` css\n * selector is added to the button when the rotation is 0.\n *\n * @api\n */\nclass Rotate extends Control {\n /**\n * @param {Options} [options] Rotate options.\n */\n constructor(options) {\n options = options ? options : {};\n\n super({\n element: document.createElement('div'),\n render: options.render,\n target: options.target,\n });\n\n const className =\n options.className !== undefined ? options.className : 'ol-rotate';\n\n const label = options.label !== undefined ? options.label : '\\u21E7';\n\n const compassClassName =\n options.compassClassName !== undefined\n ? options.compassClassName\n : 'ol-compass';\n\n /**\n * @type {HTMLElement}\n * @private\n */\n this.label_ = null;\n\n if (typeof label === 'string') {\n this.label_ = document.createElement('span');\n this.label_.className = compassClassName;\n this.label_.textContent = label;\n } else {\n this.label_ = label;\n this.label_.classList.add(compassClassName);\n }\n\n const tipLabel = options.tipLabel ? options.tipLabel : 'Reset rotation';\n\n const button = document.createElement('button');\n button.className = className + '-reset';\n button.setAttribute('type', 'button');\n button.title = tipLabel;\n button.appendChild(this.label_);\n\n button.addEventListener(\n EventType.CLICK,\n this.handleClick_.bind(this),\n false\n );\n\n const cssClasses =\n className + ' ' + CLASS_UNSELECTABLE + ' ' + CLASS_CONTROL;\n const element = this.element;\n element.className = cssClasses;\n element.appendChild(button);\n\n this.callResetNorth_ = options.resetNorth ? options.resetNorth : undefined;\n\n /**\n * @type {number}\n * @private\n */\n this.duration_ = options.duration !== undefined ? options.duration : 250;\n\n /**\n * @type {boolean}\n * @private\n */\n this.autoHide_ = options.autoHide !== undefined ? options.autoHide : true;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.rotation_ = undefined;\n\n if (this.autoHide_) {\n this.element.classList.add(CLASS_HIDDEN);\n }\n }\n\n /**\n * @param {MouseEvent} event The event to handle\n * @private\n */\n handleClick_(event) {\n event.preventDefault();\n if (this.callResetNorth_ !== undefined) {\n this.callResetNorth_();\n } else {\n this.resetNorth_();\n }\n }\n\n /**\n * @private\n */\n resetNorth_() {\n const map = this.getMap();\n const view = map.getView();\n if (!view) {\n // the map does not have a view, so we can't act\n // upon it\n return;\n }\n const rotation = view.getRotation();\n if (rotation !== undefined) {\n if (this.duration_ > 0 && rotation % (2 * Math.PI) !== 0) {\n view.animate({\n rotation: 0,\n duration: this.duration_,\n easing: easeOut,\n });\n } else {\n view.setRotation(0);\n }\n }\n }\n\n /**\n * Update the rotate control element.\n * @param {import(\"../MapEvent.js\").default} mapEvent Map event.\n * @override\n */\n render(mapEvent) {\n const frameState = mapEvent.frameState;\n if (!frameState) {\n return;\n }\n const rotation = frameState.viewState.rotation;\n if (rotation != this.rotation_) {\n const transform = 'rotate(' + rotation + 'rad)';\n if (this.autoHide_) {\n const contains = this.element.classList.contains(CLASS_HIDDEN);\n if (!contains && rotation === 0) {\n this.element.classList.add(CLASS_HIDDEN);\n } else if (contains && rotation !== 0) {\n this.element.classList.remove(CLASS_HIDDEN);\n }\n }\n this.label_.style.transform = transform;\n }\n this.rotation_ = rotation;\n }\n}\n\nexport default Rotate;\n","/**\n * @module ol/control/Zoom\n */\nimport Control from './Control.js';\nimport EventType from '../events/EventType.js';\nimport {CLASS_CONTROL, CLASS_UNSELECTABLE} from '../css.js';\nimport {easeOut} from '../easing.js';\n\n/**\n * @typedef {Object} Options\n * @property {number} [duration=250] Animation duration in milliseconds.\n * @property {string} [className='ol-zoom'] CSS class name.\n * @property {string} [zoomInClassName=className + '-in'] CSS class name for the zoom-in button.\n * @property {string} [zoomOutClassName=className + '-out'] CSS class name for the zoom-out button.\n * @property {string|HTMLElement} [zoomInLabel='+'] Text label to use for the zoom-in\n * button. Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {string|HTMLElement} [zoomOutLabel='–'] Text label to use for the zoom-out button.\n * Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {string} [zoomInTipLabel='Zoom in'] Text label to use for the button tip.\n * @property {string} [zoomOutTipLabel='Zoom out'] Text label to use for the button tip.\n * @property {number} [delta=1] The zoom delta applied on each click.\n * @property {HTMLElement|string} [target] Specify a target if you want the control to be\n * rendered outside of the map's viewport.\n */\n\n/**\n * @classdesc\n * A control with 2 buttons, one for zoom in and one for zoom out.\n * This control is one of the default controls of a map. To style this control\n * use css selectors `.ol-zoom-in` and `.ol-zoom-out`.\n *\n * @api\n */\nclass Zoom extends Control {\n /**\n * @param {Options} [options] Zoom options.\n */\n constructor(options) {\n options = options ? options : {};\n\n super({\n element: document.createElement('div'),\n target: options.target,\n });\n\n const className =\n options.className !== undefined ? options.className : 'ol-zoom';\n\n const delta = options.delta !== undefined ? options.delta : 1;\n\n const zoomInClassName =\n options.zoomInClassName !== undefined\n ? options.zoomInClassName\n : className + '-in';\n\n const zoomOutClassName =\n options.zoomOutClassName !== undefined\n ? options.zoomOutClassName\n : className + '-out';\n\n const zoomInLabel =\n options.zoomInLabel !== undefined ? options.zoomInLabel : '+';\n const zoomOutLabel =\n options.zoomOutLabel !== undefined ? options.zoomOutLabel : '\\u2013';\n\n const zoomInTipLabel =\n options.zoomInTipLabel !== undefined ? options.zoomInTipLabel : 'Zoom in';\n const zoomOutTipLabel =\n options.zoomOutTipLabel !== undefined\n ? options.zoomOutTipLabel\n : 'Zoom out';\n\n const inElement = document.createElement('button');\n inElement.className = zoomInClassName;\n inElement.setAttribute('type', 'button');\n inElement.title = zoomInTipLabel;\n inElement.appendChild(\n typeof zoomInLabel === 'string'\n ? document.createTextNode(zoomInLabel)\n : zoomInLabel\n );\n\n inElement.addEventListener(\n EventType.CLICK,\n this.handleClick_.bind(this, delta),\n false\n );\n\n const outElement = document.createElement('button');\n outElement.className = zoomOutClassName;\n outElement.setAttribute('type', 'button');\n outElement.title = zoomOutTipLabel;\n outElement.appendChild(\n typeof zoomOutLabel === 'string'\n ? document.createTextNode(zoomOutLabel)\n : zoomOutLabel\n );\n\n outElement.addEventListener(\n EventType.CLICK,\n this.handleClick_.bind(this, -delta),\n false\n );\n\n const cssClasses =\n className + ' ' + CLASS_UNSELECTABLE + ' ' + CLASS_CONTROL;\n const element = this.element;\n element.className = cssClasses;\n element.appendChild(inElement);\n element.appendChild(outElement);\n\n /**\n * @type {number}\n * @private\n */\n this.duration_ = options.duration !== undefined ? options.duration : 250;\n }\n\n /**\n * @param {number} delta Zoom delta.\n * @param {MouseEvent} event The event to handle\n * @private\n */\n handleClick_(delta, event) {\n event.preventDefault();\n this.zoomByDelta_(delta);\n }\n\n /**\n * @param {number} delta Zoom delta.\n * @private\n */\n zoomByDelta_(delta) {\n const map = this.getMap();\n const view = map.getView();\n if (!view) {\n // the map does not have a view, so we can't act\n // upon it\n return;\n }\n const currentZoom = view.getZoom();\n if (currentZoom !== undefined) {\n const newZoom = view.getConstrainedZoom(currentZoom + delta);\n if (this.duration_ > 0) {\n if (view.getAnimating()) {\n view.cancelAnimations();\n }\n view.animate({\n zoom: newZoom,\n duration: this.duration_,\n easing: easeOut,\n });\n } else {\n view.setZoom(newZoom);\n }\n }\n }\n}\n\nexport default Zoom;\n","/**\n * @module ol/control/defaults\n */\nimport Attribution from './Attribution.js';\nimport Collection from '../Collection.js';\nimport Rotate from './Rotate.js';\nimport Zoom from './Zoom.js';\n\n/**\n * @typedef {Object} DefaultsOptions\n * @property {boolean} [attribution=true] Include\n * {@link module:ol/control/Attribution~Attribution}.\n * @property {import(\"./Attribution.js\").Options} [attributionOptions]\n * Options for {@link module:ol/control/Attribution~Attribution}.\n * @property {boolean} [rotate=true] Include\n * {@link module:ol/control/Rotate~Rotate}.\n * @property {import(\"./Rotate.js\").Options} [rotateOptions] Options\n * for {@link module:ol/control/Rotate~Rotate}.\n * @property {boolean} [zoom] Include {@link module:ol/control/Zoom~Zoom}.\n * @property {import(\"./Zoom.js\").Options} [zoomOptions] Options for\n * {@link module:ol/control/Zoom~Zoom}.\n */\n\n/**\n * Set of controls included in maps by default. Unless configured otherwise,\n * this returns a collection containing an instance of each of the following\n * controls:\n * * {@link module:ol/control/Zoom~Zoom}\n * * {@link module:ol/control/Rotate~Rotate}\n * * {@link module:ol/control/Attribution~Attribution}\n *\n * @param {DefaultsOptions} [options] Options for the default controls.\n * @return {Collection} A collection of controls\n * to be used with the {@link module:ol/Map~Map} constructor's `controls` option.\n * @api\n */\nexport function defaults(options) {\n options = options ? options : {};\n\n /** @type {Collection} */\n const controls = new Collection();\n\n const zoomControl = options.zoom !== undefined ? options.zoom : true;\n if (zoomControl) {\n controls.push(new Zoom(options.zoomOptions));\n }\n\n const rotateControl = options.rotate !== undefined ? options.rotate : true;\n if (rotateControl) {\n controls.push(new Rotate(options.rotateOptions));\n }\n\n const attributionControl =\n options.attribution !== undefined ? options.attribution : true;\n if (attributionControl) {\n controls.push(new Attribution(options.attributionOptions));\n }\n\n return controls;\n}\n","/**\n * @module ol/interaction/Property\n */\n\n/**\n * @enum {string}\n */\nexport default {\n ACTIVE: 'active',\n};\n","/**\n * @module ol/interaction/Interaction\n */\nimport BaseObject from '../Object.js';\nimport InteractionProperty from './Property.js';\nimport {easeOut, linear} from '../easing.js';\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature &\n * import(\"../Observable\").OnSignature &\n * import(\"../Observable\").CombinedOnSignature} InteractionOnSignature\n */\n\n/**\n * Object literal with config options for interactions.\n * @typedef {Object} InteractionOptions\n * @property {function(import(\"../MapBrowserEvent.js\").default):boolean} handleEvent\n * Method called by the map to notify the interaction that a browser event was\n * dispatched to the map. If the function returns a falsy value, propagation of\n * the event to other interactions in the map's interactions chain will be\n * prevented (this includes functions with no explicit return). The interactions\n * are traversed in reverse order of the interactions collection of the map.\n */\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * User actions that change the state of the map. Some are similar to controls,\n * but are not associated with a DOM element.\n * For example, {@link module:ol/interaction/KeyboardZoom~KeyboardZoom} is\n * functionally the same as {@link module:ol/control/Zoom~Zoom}, but triggered\n * by a keyboard event not a button element event.\n * Although interactions do not have a DOM element, some of them do render\n * vectors and so are visible on the screen.\n * @api\n */\nclass Interaction extends BaseObject {\n /**\n * @param {InteractionOptions} [options] Options.\n */\n constructor(options) {\n super();\n\n /***\n * @type {InteractionOnSignature}\n */\n this.on;\n\n /***\n * @type {InteractionOnSignature}\n */\n this.once;\n\n /***\n * @type {InteractionOnSignature}\n */\n this.un;\n\n if (options && options.handleEvent) {\n this.handleEvent = options.handleEvent;\n }\n\n /**\n * @private\n * @type {import(\"../Map.js\").default|null}\n */\n this.map_ = null;\n\n this.setActive(true);\n }\n\n /**\n * Return whether the interaction is currently active.\n * @return {boolean} `true` if the interaction is active, `false` otherwise.\n * @observable\n * @api\n */\n getActive() {\n return /** @type {boolean} */ (this.get(InteractionProperty.ACTIVE));\n }\n\n /**\n * Get the map associated with this interaction.\n * @return {import(\"../Map.js\").default|null} Map.\n * @api\n */\n getMap() {\n return this.map_;\n }\n\n /**\n * Handles the {@link module:ol/MapBrowserEvent~MapBrowserEvent map browser event}.\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} `false` to stop event propagation.\n * @api\n */\n handleEvent(mapBrowserEvent) {\n return true;\n }\n\n /**\n * Activate or deactivate the interaction.\n * @param {boolean} active Active.\n * @observable\n * @api\n */\n setActive(active) {\n this.set(InteractionProperty.ACTIVE, active);\n }\n\n /**\n * Remove the interaction from its current map and attach it to the new map.\n * Subclasses may set up event handlers to get notified about changes to\n * the map here.\n * @param {import(\"../Map.js\").default|null} map Map.\n */\n setMap(map) {\n this.map_ = map;\n }\n}\n\n/**\n * @param {import(\"../View.js\").default} view View.\n * @param {import(\"../coordinate.js\").Coordinate} delta Delta.\n * @param {number} [duration] Duration.\n */\nexport function pan(view, delta, duration) {\n const currentCenter = view.getCenterInternal();\n if (currentCenter) {\n const center = [currentCenter[0] + delta[0], currentCenter[1] + delta[1]];\n view.animateInternal({\n duration: duration !== undefined ? duration : 250,\n easing: linear,\n center: view.getConstrainedCenter(center),\n });\n }\n}\n\n/**\n * @param {import(\"../View.js\").default} view View.\n * @param {number} delta Delta from previous zoom level.\n * @param {import(\"../coordinate.js\").Coordinate} [anchor] Anchor coordinate in the user projection.\n * @param {number} [duration] Duration.\n */\nexport function zoomByDelta(view, delta, anchor, duration) {\n const currentZoom = view.getZoom();\n\n if (currentZoom === undefined) {\n return;\n }\n\n const newZoom = view.getConstrainedZoom(currentZoom + delta);\n const newResolution = view.getResolutionForZoom(newZoom);\n\n if (view.getAnimating()) {\n view.cancelAnimations();\n }\n view.animate({\n resolution: newResolution,\n anchor: anchor,\n duration: duration !== undefined ? duration : 250,\n easing: easeOut,\n });\n}\n\nexport default Interaction;\n","/**\n * @module ol/interaction/DoubleClickZoom\n */\nimport Interaction, {zoomByDelta} from './Interaction.js';\nimport MapBrowserEventType from '../MapBrowserEventType.js';\n\n/**\n * @typedef {Object} Options\n * @property {number} [duration=250] Animation duration in milliseconds.\n * @property {number} [delta=1] The zoom delta applied on each double click.\n */\n\n/**\n * @classdesc\n * Allows the user to zoom by double-clicking on the map.\n * @api\n */\nclass DoubleClickZoom extends Interaction {\n /**\n * @param {Options} [options] Options.\n */\n constructor(options) {\n super();\n\n options = options ? options : {};\n\n /**\n * @private\n * @type {number}\n */\n this.delta_ = options.delta ? options.delta : 1;\n\n /**\n * @private\n * @type {number}\n */\n this.duration_ = options.duration !== undefined ? options.duration : 250;\n }\n\n /**\n * Handles the {@link module:ol/MapBrowserEvent~MapBrowserEvent map browser event} (if it was a\n * doubleclick) and eventually zooms the map.\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} `false` to stop event propagation.\n */\n handleEvent(mapBrowserEvent) {\n let stopEvent = false;\n if (mapBrowserEvent.type == MapBrowserEventType.DBLCLICK) {\n const browserEvent = /** @type {MouseEvent} */ (\n mapBrowserEvent.originalEvent\n );\n const map = mapBrowserEvent.map;\n const anchor = mapBrowserEvent.coordinate;\n const delta = browserEvent.shiftKey ? -this.delta_ : this.delta_;\n const view = map.getView();\n zoomByDelta(view, delta, anchor, this.duration_);\n browserEvent.preventDefault();\n stopEvent = true;\n }\n return !stopEvent;\n }\n}\n\nexport default DoubleClickZoom;\n","/**\n * @module ol/interaction/Pointer\n */\nimport Interaction from './Interaction.js';\nimport MapBrowserEventType from '../MapBrowserEventType.js';\n\n/**\n * @typedef {Object} Options\n * @property {function(import(\"../MapBrowserEvent.js\").default):boolean} [handleDownEvent]\n * Function handling \"down\" events. If the function returns `true` then a drag\n * sequence is started.\n * @property {function(import(\"../MapBrowserEvent.js\").default):void} [handleDragEvent]\n * Function handling \"drag\" events. This function is called on \"move\" events\n * during a drag sequence.\n * @property {function(import(\"../MapBrowserEvent.js\").default):boolean} [handleEvent]\n * Method called by the map to notify the interaction that a browser event was\n * dispatched to the map. The function may return `false` to prevent the\n * propagation of the event to other interactions in the map's interactions\n * chain.\n * @property {function(import(\"../MapBrowserEvent.js\").default):void} [handleMoveEvent]\n * Function handling \"move\" events. This function is called on \"move\" events.\n * This functions is also called during a drag sequence, so during a drag\n * sequence both the `handleDragEvent` function and this function are called.\n * If `handleDownEvent` is defined and it returns true this function will not\n * be called during a drag sequence.\n * @property {function(import(\"../MapBrowserEvent.js\").default):boolean} [handleUpEvent]\n * Function handling \"up\" events. If the function returns `false` then the\n * current drag sequence is stopped.\n * @property {function(boolean):boolean} [stopDown]\n * Should the down event be propagated to other interactions, or should be\n * stopped?\n */\n\n/**\n * @classdesc\n * Base class that calls user-defined functions on `down`, `move` and `up`\n * events. This class also manages \"drag sequences\".\n *\n * When the `handleDownEvent` user function returns `true` a drag sequence is\n * started. During a drag sequence the `handleDragEvent` user function is\n * called on `move` events. The drag sequence ends when the `handleUpEvent`\n * user function is called and returns `false`.\n * @api\n */\nclass PointerInteraction extends Interaction {\n /**\n * @param {Options} [options] Options.\n */\n constructor(options) {\n options = options ? options : {};\n\n super(\n /** @type {import(\"./Interaction.js\").InteractionOptions} */ (options)\n );\n\n if (options.handleDownEvent) {\n this.handleDownEvent = options.handleDownEvent;\n }\n\n if (options.handleDragEvent) {\n this.handleDragEvent = options.handleDragEvent;\n }\n\n if (options.handleMoveEvent) {\n this.handleMoveEvent = options.handleMoveEvent;\n }\n\n if (options.handleUpEvent) {\n this.handleUpEvent = options.handleUpEvent;\n }\n\n if (options.stopDown) {\n this.stopDown = options.stopDown;\n }\n\n /**\n * @type {boolean}\n * @protected\n */\n this.handlingDownUpSequence = false;\n\n /**\n * @type {Array}\n * @protected\n */\n this.targetPointers = [];\n }\n\n /**\n * Returns the current number of pointers involved in the interaction,\n * e.g. `2` when two fingers are used.\n * @return {number} The number of pointers.\n * @api\n */\n getPointerCount() {\n return this.targetPointers.length;\n }\n\n /**\n * Handle pointer down events.\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n * @return {boolean} If the event was consumed.\n * @protected\n */\n handleDownEvent(mapBrowserEvent) {\n return false;\n }\n\n /**\n * Handle pointer drag events.\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n * @protected\n */\n handleDragEvent(mapBrowserEvent) {}\n\n /**\n * Handles the {@link module:ol/MapBrowserEvent~MapBrowserEvent map browser event} and may call into\n * other functions, if event sequences like e.g. 'drag' or 'down-up' etc. are\n * detected.\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} `false` to stop event propagation.\n * @api\n */\n handleEvent(mapBrowserEvent) {\n if (!mapBrowserEvent.originalEvent) {\n return true;\n }\n\n let stopEvent = false;\n this.updateTrackedPointers_(mapBrowserEvent);\n if (this.handlingDownUpSequence) {\n if (mapBrowserEvent.type == MapBrowserEventType.POINTERDRAG) {\n this.handleDragEvent(mapBrowserEvent);\n // prevent page scrolling during dragging\n mapBrowserEvent.originalEvent.preventDefault();\n } else if (mapBrowserEvent.type == MapBrowserEventType.POINTERUP) {\n const handledUp = this.handleUpEvent(mapBrowserEvent);\n this.handlingDownUpSequence =\n handledUp && this.targetPointers.length > 0;\n }\n } else {\n if (mapBrowserEvent.type == MapBrowserEventType.POINTERDOWN) {\n const handled = this.handleDownEvent(mapBrowserEvent);\n this.handlingDownUpSequence = handled;\n stopEvent = this.stopDown(handled);\n } else if (mapBrowserEvent.type == MapBrowserEventType.POINTERMOVE) {\n this.handleMoveEvent(mapBrowserEvent);\n }\n }\n return !stopEvent;\n }\n\n /**\n * Handle pointer move events.\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n * @protected\n */\n handleMoveEvent(mapBrowserEvent) {}\n\n /**\n * Handle pointer up events.\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n * @return {boolean} If the event was consumed.\n * @protected\n */\n handleUpEvent(mapBrowserEvent) {\n return false;\n }\n\n /**\n * This function is used to determine if \"down\" events should be propagated\n * to other interactions or should be stopped.\n * @param {boolean} handled Was the event handled by the interaction?\n * @return {boolean} Should the `down` event be stopped?\n */\n stopDown(handled) {\n return handled;\n }\n\n /**\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n * @private\n */\n updateTrackedPointers_(mapBrowserEvent) {\n if (mapBrowserEvent.activePointers) {\n this.targetPointers = mapBrowserEvent.activePointers;\n }\n }\n}\n\n/**\n * @param {Array} pointerEvents List of events.\n * @return {{clientX: number, clientY: number}} Centroid pixel.\n */\nexport function centroid(pointerEvents) {\n const length = pointerEvents.length;\n let clientX = 0;\n let clientY = 0;\n for (let i = 0; i < length; i++) {\n clientX += pointerEvents[i].clientX;\n clientY += pointerEvents[i].clientY;\n }\n return {clientX: clientX / length, clientY: clientY / length};\n}\n\nexport default PointerInteraction;\n","/**\n * @module ol/events/condition\n */\nimport MapBrowserEventType from '../MapBrowserEventType.js';\nimport {FALSE, TRUE} from '../functions.js';\nimport {MAC, WEBKIT} from '../has.js';\nimport {assert} from '../asserts.js';\n\n/**\n * A function that takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * `{boolean}`. If the condition is met, true should be returned.\n *\n * @typedef {function(this: ?, import(\"../MapBrowserEvent.js\").default): boolean} Condition\n */\n\n/**\n * Creates a condition function that passes when all provided conditions pass.\n * @param {...Condition} var_args Conditions to check.\n * @return {Condition} Condition function.\n */\nexport function all(var_args) {\n const conditions = arguments;\n /**\n * @param {import(\"../MapBrowserEvent.js\").default} event Event.\n * @return {boolean} All conditions passed.\n */\n return function (event) {\n let pass = true;\n for (let i = 0, ii = conditions.length; i < ii; ++i) {\n pass = pass && conditions[i](event);\n if (!pass) {\n break;\n }\n }\n return pass;\n };\n}\n\n/**\n * Return `true` if only the alt-key is pressed, `false` otherwise (e.g. when\n * additionally the shift-key is pressed).\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if only the alt key is pressed.\n * @api\n */\nexport const altKeyOnly = function (mapBrowserEvent) {\n const originalEvent = /** @type {KeyboardEvent|MouseEvent|TouchEvent} */ (\n mapBrowserEvent.originalEvent\n );\n return (\n originalEvent.altKey &&\n !(originalEvent.metaKey || originalEvent.ctrlKey) &&\n !originalEvent.shiftKey\n );\n};\n\n/**\n * Return `true` if only the alt-key and shift-key is pressed, `false` otherwise\n * (e.g. when additionally the platform-modifier-key is pressed).\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if only the alt and shift keys are pressed.\n * @api\n */\nexport const altShiftKeysOnly = function (mapBrowserEvent) {\n const originalEvent = /** @type {KeyboardEvent|MouseEvent|TouchEvent} */ (\n mapBrowserEvent.originalEvent\n );\n return (\n originalEvent.altKey &&\n !(originalEvent.metaKey || originalEvent.ctrlKey) &&\n originalEvent.shiftKey\n );\n};\n\n/**\n * Return `true` if the map has the focus. This condition requires a map target\n * element with a `tabindex` attribute, e.g. `
`.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} event Map browser event.\n * @return {boolean} The map has the focus.\n * @api\n */\nexport const focus = function (event) {\n const targetElement = event.map.getTargetElement();\n const activeElement = event.map.getOwnerDocument().activeElement;\n return targetElement.contains(activeElement);\n};\n\n/**\n * Return `true` if the map has the focus or no 'tabindex' attribute set.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} event Map browser event.\n * @return {boolean} The map container has the focus or no 'tabindex' attribute.\n */\nexport const focusWithTabindex = function (event) {\n return event.map.getTargetElement().hasAttribute('tabindex')\n ? focus(event)\n : true;\n};\n\n/**\n * Return always true.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True.\n * @api\n */\nexport const always = TRUE;\n\n/**\n * Return `true` if the event is a `click` event, `false` otherwise.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if the event is a map `click` event.\n * @api\n */\nexport const click = function (mapBrowserEvent) {\n return mapBrowserEvent.type == MapBrowserEventType.CLICK;\n};\n\n/**\n * Return `true` if the event has an \"action\"-producing mouse button.\n *\n * By definition, this includes left-click on windows/linux, and left-click\n * without the ctrl key on Macs.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} The result.\n */\nexport const mouseActionButton = function (mapBrowserEvent) {\n const originalEvent = /** @type {MouseEvent} */ (\n mapBrowserEvent.originalEvent\n );\n return originalEvent.button == 0 && !(WEBKIT && MAC && originalEvent.ctrlKey);\n};\n\n/**\n * Return always false.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} False.\n * @api\n */\nexport const never = FALSE;\n\n/**\n * Return `true` if the browser event is a `pointermove` event, `false`\n * otherwise.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if the browser event is a `pointermove` event.\n * @api\n */\nexport const pointerMove = function (mapBrowserEvent) {\n return mapBrowserEvent.type == 'pointermove';\n};\n\n/**\n * Return `true` if the event is a map `singleclick` event, `false` otherwise.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if the event is a map `singleclick` event.\n * @api\n */\nexport const singleClick = function (mapBrowserEvent) {\n return mapBrowserEvent.type == MapBrowserEventType.SINGLECLICK;\n};\n\n/**\n * Return `true` if the event is a map `dblclick` event, `false` otherwise.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if the event is a map `dblclick` event.\n * @api\n */\nexport const doubleClick = function (mapBrowserEvent) {\n return mapBrowserEvent.type == MapBrowserEventType.DBLCLICK;\n};\n\n/**\n * Return `true` if no modifier key (alt-, shift- or platform-modifier-key) is\n * pressed.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True only if there no modifier keys are pressed.\n * @api\n */\nexport const noModifierKeys = function (mapBrowserEvent) {\n const originalEvent = /** @type {KeyboardEvent|MouseEvent|TouchEvent} */ (\n mapBrowserEvent.originalEvent\n );\n return (\n !originalEvent.altKey &&\n !(originalEvent.metaKey || originalEvent.ctrlKey) &&\n !originalEvent.shiftKey\n );\n};\n\n/**\n * Return `true` if only the platform-modifier-key (the meta-key on Mac,\n * ctrl-key otherwise) is pressed, `false` otherwise (e.g. when additionally\n * the shift-key is pressed).\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if only the platform modifier key is pressed.\n * @api\n */\nexport const platformModifierKeyOnly = function (mapBrowserEvent) {\n const originalEvent = /** @type {KeyboardEvent|MouseEvent|TouchEvent} */ (\n mapBrowserEvent.originalEvent\n );\n return (\n !originalEvent.altKey &&\n (MAC ? originalEvent.metaKey : originalEvent.ctrlKey) &&\n !originalEvent.shiftKey\n );\n};\n\n/**\n * Return `true` if only the shift-key is pressed, `false` otherwise (e.g. when\n * additionally the alt-key is pressed).\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if only the shift key is pressed.\n * @api\n */\nexport const shiftKeyOnly = function (mapBrowserEvent) {\n const originalEvent = /** @type {KeyboardEvent|MouseEvent|TouchEvent} */ (\n mapBrowserEvent.originalEvent\n );\n return (\n !originalEvent.altKey &&\n !(originalEvent.metaKey || originalEvent.ctrlKey) &&\n originalEvent.shiftKey\n );\n};\n\n/**\n * Return `true` if the target element is not editable, i.e. not an `input`,\n * `select`, or `textarea` element and no `contenteditable` attribute is\n * set or inherited, `false` otherwise.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True only if the target element is not editable.\n * @api\n */\nexport const targetNotEditable = function (mapBrowserEvent) {\n const originalEvent = /** @type {KeyboardEvent|MouseEvent|TouchEvent} */ (\n mapBrowserEvent.originalEvent\n );\n const tagName = /** @type {Element} */ (originalEvent.target).tagName;\n return (\n tagName !== 'INPUT' &&\n tagName !== 'SELECT' &&\n tagName !== 'TEXTAREA' &&\n // `isContentEditable` is only available on `HTMLElement`, but it may also be a\n // different type like `SVGElement`.\n // @ts-ignore\n !originalEvent.target.isContentEditable\n );\n};\n\n/**\n * Return `true` if the event originates from a mouse device.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if the event originates from a mouse device.\n * @api\n */\nexport const mouseOnly = function (mapBrowserEvent) {\n const pointerEvent = /** @type {import(\"../MapBrowserEvent\").default} */ (\n mapBrowserEvent\n ).originalEvent;\n assert(pointerEvent !== undefined, 56); // mapBrowserEvent must originate from a pointer event\n // see https://www.w3.org/TR/pointerevents/#widl-PointerEvent-pointerType\n return pointerEvent.pointerType == 'mouse';\n};\n\n/**\n * Return `true` if the event originates from a touchable device.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if the event originates from a touchable device.\n * @api\n */\nexport const touchOnly = function (mapBrowserEvent) {\n const pointerEvt = /** @type {import(\"../MapBrowserEvent\").default} */ (\n mapBrowserEvent\n ).originalEvent;\n assert(pointerEvt !== undefined, 56); // mapBrowserEvent must originate from a pointer event\n // see https://www.w3.org/TR/pointerevents/#widl-PointerEvent-pointerType\n return pointerEvt.pointerType === 'touch';\n};\n\n/**\n * Return `true` if the event originates from a digital pen.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if the event originates from a digital pen.\n * @api\n */\nexport const penOnly = function (mapBrowserEvent) {\n const pointerEvt = /** @type {import(\"../MapBrowserEvent\").default} */ (\n mapBrowserEvent\n ).originalEvent;\n assert(pointerEvt !== undefined, 56); // mapBrowserEvent must originate from a pointer event\n // see https://www.w3.org/TR/pointerevents/#widl-PointerEvent-pointerType\n return pointerEvt.pointerType === 'pen';\n};\n\n/**\n * Return `true` if the event originates from a primary pointer in\n * contact with the surface or if the left mouse button is pressed.\n * See https://www.w3.org/TR/pointerevents/#button-states.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if the event originates from a primary pointer.\n * @api\n */\nexport const primaryAction = function (mapBrowserEvent) {\n const pointerEvent = /** @type {import(\"../MapBrowserEvent\").default} */ (\n mapBrowserEvent\n ).originalEvent;\n assert(pointerEvent !== undefined, 56); // mapBrowserEvent must originate from a pointer event\n return pointerEvent.isPrimary && pointerEvent.button === 0;\n};\n","/**\n * @module ol/interaction/DragPan\n */\nimport PointerInteraction, {\n centroid as centroidFromPointers,\n} from './Pointer.js';\nimport {FALSE} from '../functions.js';\nimport {\n all,\n focusWithTabindex,\n noModifierKeys,\n primaryAction,\n} from '../events/condition.js';\nimport {easeOut} from '../easing.js';\nimport {\n rotate as rotateCoordinate,\n scale as scaleCoordinate,\n} from '../coordinate.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a boolean\n * to indicate whether that event should be handled.\n * Default is {@link module:ol/events/condition.noModifierKeys} and {@link module:ol/events/condition.primaryAction}.\n * @property {boolean} [onFocusOnly=false] When the map's target has a `tabindex` attribute set,\n * the interaction will only handle events when the map has the focus.\n * @property {import(\"../Kinetic.js\").default} [kinetic] Kinetic inertia to apply to the pan.\n */\n\n/**\n * @classdesc\n * Allows the user to pan the map by dragging the map.\n * @api\n */\nclass DragPan extends PointerInteraction {\n /**\n * @param {Options} [options] Options.\n */\n constructor(options) {\n super({\n stopDown: FALSE,\n });\n\n options = options ? options : {};\n\n /**\n * @private\n * @type {import(\"../Kinetic.js\").default|undefined}\n */\n this.kinetic_ = options.kinetic;\n\n /**\n * @type {import(\"../pixel.js\").Pixel}\n */\n this.lastCentroid = null;\n\n /**\n * @type {number}\n */\n this.lastPointersCount_;\n\n /**\n * @type {boolean}\n */\n this.panning_ = false;\n\n const condition = options.condition\n ? options.condition\n : all(noModifierKeys, primaryAction);\n\n /**\n * @private\n * @type {import(\"../events/condition.js\").Condition}\n */\n this.condition_ = options.onFocusOnly\n ? all(focusWithTabindex, condition)\n : condition;\n\n /**\n * @private\n * @type {boolean}\n */\n this.noKinetic_ = false;\n }\n\n /**\n * Handle pointer drag events.\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n */\n handleDragEvent(mapBrowserEvent) {\n const map = mapBrowserEvent.map;\n if (!this.panning_) {\n this.panning_ = true;\n map.getView().beginInteraction();\n }\n const targetPointers = this.targetPointers;\n const centroid = map.getEventPixel(centroidFromPointers(targetPointers));\n if (targetPointers.length == this.lastPointersCount_) {\n if (this.kinetic_) {\n this.kinetic_.update(centroid[0], centroid[1]);\n }\n if (this.lastCentroid) {\n const delta = [\n this.lastCentroid[0] - centroid[0],\n centroid[1] - this.lastCentroid[1],\n ];\n const map = mapBrowserEvent.map;\n const view = map.getView();\n scaleCoordinate(delta, view.getResolution());\n rotateCoordinate(delta, view.getRotation());\n view.adjustCenterInternal(delta);\n }\n } else if (this.kinetic_) {\n // reset so we don't overestimate the kinetic energy after\n // after one finger down, tiny drag, second finger down\n this.kinetic_.begin();\n }\n this.lastCentroid = centroid;\n this.lastPointersCount_ = targetPointers.length;\n mapBrowserEvent.originalEvent.preventDefault();\n }\n\n /**\n * Handle pointer up events.\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n * @return {boolean} If the event was consumed.\n */\n handleUpEvent(mapBrowserEvent) {\n const map = mapBrowserEvent.map;\n const view = map.getView();\n if (this.targetPointers.length === 0) {\n if (!this.noKinetic_ && this.kinetic_ && this.kinetic_.end()) {\n const distance = this.kinetic_.getDistance();\n const angle = this.kinetic_.getAngle();\n const center = view.getCenterInternal();\n const centerpx = map.getPixelFromCoordinateInternal(center);\n const dest = map.getCoordinateFromPixelInternal([\n centerpx[0] - distance * Math.cos(angle),\n centerpx[1] - distance * Math.sin(angle),\n ]);\n view.animateInternal({\n center: view.getConstrainedCenter(dest),\n duration: 500,\n easing: easeOut,\n });\n }\n if (this.panning_) {\n this.panning_ = false;\n view.endInteraction();\n }\n return false;\n }\n if (this.kinetic_) {\n // reset so we don't overestimate the kinetic energy after\n // after one finger up, tiny drag, second finger up\n this.kinetic_.begin();\n }\n this.lastCentroid = null;\n return true;\n }\n\n /**\n * Handle pointer down events.\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n * @return {boolean} If the event was consumed.\n */\n handleDownEvent(mapBrowserEvent) {\n if (this.targetPointers.length > 0 && this.condition_(mapBrowserEvent)) {\n const map = mapBrowserEvent.map;\n const view = map.getView();\n this.lastCentroid = null;\n // stop any current animation\n if (view.getAnimating()) {\n view.cancelAnimations();\n }\n if (this.kinetic_) {\n this.kinetic_.begin();\n }\n // No kinetic as soon as more than one pointer on the screen is\n // detected. This is to prevent nasty pans after pinch.\n this.noKinetic_ = this.targetPointers.length > 1;\n return true;\n }\n return false;\n }\n}\n\nexport default DragPan;\n","/**\n * @module ol/interaction/DragRotate\n */\nimport PointerInteraction from './Pointer.js';\nimport {FALSE} from '../functions.js';\nimport {\n altShiftKeysOnly,\n mouseActionButton,\n mouseOnly,\n} from '../events/condition.js';\nimport {disable} from '../rotationconstraint.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that takes an\n * {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a boolean\n * to indicate whether that event should be handled.\n * Default is {@link module:ol/events/condition.altShiftKeysOnly}.\n * @property {number} [duration=250] Animation duration in milliseconds.\n */\n\n/**\n * @classdesc\n * Allows the user to rotate the map by clicking and dragging on the map,\n * normally combined with an {@link module:ol/events/condition} that limits\n * it to when the alt and shift keys are held down.\n *\n * This interaction is only supported for mouse devices.\n * @api\n */\nclass DragRotate extends PointerInteraction {\n /**\n * @param {Options} [options] Options.\n */\n constructor(options) {\n options = options ? options : {};\n\n super({\n stopDown: FALSE,\n });\n\n /**\n * @private\n * @type {import(\"../events/condition.js\").Condition}\n */\n this.condition_ = options.condition ? options.condition : altShiftKeysOnly;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.lastAngle_ = undefined;\n\n /**\n * @private\n * @type {number}\n */\n this.duration_ = options.duration !== undefined ? options.duration : 250;\n }\n\n /**\n * Handle pointer drag events.\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n */\n handleDragEvent(mapBrowserEvent) {\n if (!mouseOnly(mapBrowserEvent)) {\n return;\n }\n\n const map = mapBrowserEvent.map;\n const view = map.getView();\n if (view.getConstraints().rotation === disable) {\n return;\n }\n const size = map.getSize();\n const offset = mapBrowserEvent.pixel;\n const theta = Math.atan2(size[1] / 2 - offset[1], offset[0] - size[0] / 2);\n if (this.lastAngle_ !== undefined) {\n const delta = theta - this.lastAngle_;\n view.adjustRotationInternal(-delta);\n }\n this.lastAngle_ = theta;\n }\n\n /**\n * Handle pointer up events.\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n * @return {boolean} If the event was consumed.\n */\n handleUpEvent(mapBrowserEvent) {\n if (!mouseOnly(mapBrowserEvent)) {\n return true;\n }\n\n const map = mapBrowserEvent.map;\n const view = map.getView();\n view.endInteraction(this.duration_);\n return false;\n }\n\n /**\n * Handle pointer down events.\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n * @return {boolean} If the event was consumed.\n */\n handleDownEvent(mapBrowserEvent) {\n if (!mouseOnly(mapBrowserEvent)) {\n return false;\n }\n\n if (\n mouseActionButton(mapBrowserEvent) &&\n this.condition_(mapBrowserEvent)\n ) {\n const map = mapBrowserEvent.map;\n map.getView().beginInteraction();\n this.lastAngle_ = undefined;\n return true;\n }\n return false;\n }\n}\n\nexport default DragRotate;\n","/**\n * @module ol/render/Box\n */\n\nimport Disposable from '../Disposable.js';\nimport Polygon from '../geom/Polygon.js';\n\nclass RenderBox extends Disposable {\n /**\n * @param {string} className CSS class name.\n */\n constructor(className) {\n super();\n\n /**\n * @type {import(\"../geom/Polygon.js\").default}\n * @private\n */\n this.geometry_ = null;\n\n /**\n * @type {HTMLDivElement}\n * @private\n */\n this.element_ = document.createElement('div');\n this.element_.style.position = 'absolute';\n this.element_.style.pointerEvents = 'auto';\n this.element_.className = 'ol-box ' + className;\n\n /**\n * @private\n * @type {import(\"../Map.js\").default|null}\n */\n this.map_ = null;\n\n /**\n * @private\n * @type {import(\"../pixel.js\").Pixel}\n */\n this.startPixel_ = null;\n\n /**\n * @private\n * @type {import(\"../pixel.js\").Pixel}\n */\n this.endPixel_ = null;\n }\n\n /**\n * Clean up.\n */\n disposeInternal() {\n this.setMap(null);\n }\n\n /**\n * @private\n */\n render_() {\n const startPixel = this.startPixel_;\n const endPixel = this.endPixel_;\n const px = 'px';\n const style = this.element_.style;\n style.left = Math.min(startPixel[0], endPixel[0]) + px;\n style.top = Math.min(startPixel[1], endPixel[1]) + px;\n style.width = Math.abs(endPixel[0] - startPixel[0]) + px;\n style.height = Math.abs(endPixel[1] - startPixel[1]) + px;\n }\n\n /**\n * @param {import(\"../Map.js\").default|null} map Map.\n */\n setMap(map) {\n if (this.map_) {\n this.map_.getOverlayContainer().removeChild(this.element_);\n const style = this.element_.style;\n style.left = 'inherit';\n style.top = 'inherit';\n style.width = 'inherit';\n style.height = 'inherit';\n }\n this.map_ = map;\n if (this.map_) {\n this.map_.getOverlayContainer().appendChild(this.element_);\n }\n }\n\n /**\n * @param {import(\"../pixel.js\").Pixel} startPixel Start pixel.\n * @param {import(\"../pixel.js\").Pixel} endPixel End pixel.\n */\n setPixels(startPixel, endPixel) {\n this.startPixel_ = startPixel;\n this.endPixel_ = endPixel;\n this.createOrUpdateGeometry();\n this.render_();\n }\n\n /**\n * Creates or updates the cached geometry.\n */\n createOrUpdateGeometry() {\n const startPixel = this.startPixel_;\n const endPixel = this.endPixel_;\n const pixels = [\n startPixel,\n [startPixel[0], endPixel[1]],\n endPixel,\n [endPixel[0], startPixel[1]],\n ];\n const coordinates = pixels.map(\n this.map_.getCoordinateFromPixelInternal,\n this.map_\n );\n // close the polygon\n coordinates[4] = coordinates[0].slice();\n if (!this.geometry_) {\n this.geometry_ = new Polygon([coordinates]);\n } else {\n this.geometry_.setCoordinates([coordinates]);\n }\n }\n\n /**\n * @return {import(\"../geom/Polygon.js\").default} Geometry.\n */\n getGeometry() {\n return this.geometry_;\n }\n}\n\nexport default RenderBox;\n","/**\n * @module ol/interaction/DragBox\n */\n// FIXME draw drag box\nimport Event from '../events/Event.js';\nimport PointerInteraction from './Pointer.js';\nimport RenderBox from '../render/Box.js';\nimport {mouseActionButton} from '../events/condition.js';\n\n/**\n * A function that takes a {@link module:ol/MapBrowserEvent~MapBrowserEvent} and two\n * {@link module:ol/pixel~Pixel}s and returns a `{boolean}`. If the condition is met,\n * true should be returned.\n * @typedef {function(this: ?, import(\"../MapBrowserEvent.js\").default, import(\"../pixel.js\").Pixel, import(\"../pixel.js\").Pixel):boolean} EndCondition\n */\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-dragbox'] CSS class name for styling the box.\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a boolean\n * to indicate whether that event should be handled.\n * Default is {@link ol/events/condition~mouseActionButton}.\n * @property {number} [minArea=64] The minimum area of the box in pixel, this value is used by the default\n * `boxEndCondition` function.\n * @property {EndCondition} [boxEndCondition] A function that takes a {@link module:ol/MapBrowserEvent~MapBrowserEvent} and two\n * {@link module:ol/pixel~Pixel}s to indicate whether a `boxend` event should be fired.\n * Default is `true` if the area of the box is bigger than the `minArea` option.\n * @property {function(this:DragBox, import(\"../MapBrowserEvent.js\").default):void} [onBoxEnd] Code to execute just\n * before `boxend` is fired.\n */\n\n/**\n * @enum {string}\n */\nconst DragBoxEventType = {\n /**\n * Triggered upon drag box start.\n * @event DragBoxEvent#boxstart\n * @api\n */\n BOXSTART: 'boxstart',\n\n /**\n * Triggered on drag when box is active.\n * @event DragBoxEvent#boxdrag\n * @api\n */\n BOXDRAG: 'boxdrag',\n\n /**\n * Triggered upon drag box end.\n * @event DragBoxEvent#boxend\n * @api\n */\n BOXEND: 'boxend',\n\n /**\n * Triggered upon drag box canceled.\n * @event DragBoxEvent#boxcancel\n * @api\n */\n BOXCANCEL: 'boxcancel',\n};\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/interaction/DragBox~DragBox} instances are instances of\n * this type.\n */\nexport class DragBoxEvent extends Event {\n /**\n * @param {string} type The event type.\n * @param {import(\"../coordinate.js\").Coordinate} coordinate The event coordinate.\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Originating event.\n */\n constructor(type, coordinate, mapBrowserEvent) {\n super(type);\n\n /**\n * The coordinate of the drag event.\n * @const\n * @type {import(\"../coordinate.js\").Coordinate}\n * @api\n */\n this.coordinate = coordinate;\n\n /**\n * @const\n * @type {import(\"../MapBrowserEvent.js\").default}\n * @api\n */\n this.mapBrowserEvent = mapBrowserEvent;\n }\n}\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature &\n * import(\"../Observable\").OnSignature &\n * import(\"../Observable\").OnSignature<'boxcancel'|'boxdrag'|'boxend'|'boxstart', DragBoxEvent, Return> &\n * import(\"../Observable\").CombinedOnSignature} DragBoxOnSignature\n */\n\n/**\n * @classdesc\n * Allows the user to draw a vector box by clicking and dragging on the map,\n * normally combined with an {@link module:ol/events/condition} that limits\n * it to when the shift or other key is held down. This is used, for example,\n * for zooming to a specific area of the map\n * (see {@link module:ol/interaction/DragZoom~DragZoom} and\n * {@link module:ol/interaction/DragRotateAndZoom~DragRotateAndZoom}).\n *\n * @fires DragBoxEvent\n * @api\n */\nclass DragBox extends PointerInteraction {\n /**\n * @param {Options} [options] Options.\n */\n constructor(options) {\n super();\n\n /***\n * @type {DragBoxOnSignature}\n */\n this.on;\n\n /***\n * @type {DragBoxOnSignature}\n */\n this.once;\n\n /***\n * @type {DragBoxOnSignature}\n */\n this.un;\n\n options = options ? options : {};\n\n /**\n * @type {import(\"../render/Box.js\").default}\n * @private\n */\n this.box_ = new RenderBox(options.className || 'ol-dragbox');\n\n /**\n * @type {number}\n * @private\n */\n this.minArea_ = options.minArea !== undefined ? options.minArea : 64;\n\n if (options.onBoxEnd) {\n this.onBoxEnd = options.onBoxEnd;\n }\n\n /**\n * @type {import(\"../pixel.js\").Pixel}\n * @private\n */\n this.startPixel_ = null;\n\n /**\n * @private\n * @type {import(\"../events/condition.js\").Condition}\n */\n this.condition_ = options.condition ? options.condition : mouseActionButton;\n\n /**\n * @private\n * @type {EndCondition}\n */\n this.boxEndCondition_ = options.boxEndCondition\n ? options.boxEndCondition\n : this.defaultBoxEndCondition;\n }\n\n /**\n * The default condition for determining whether the boxend event\n * should fire.\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent The originating MapBrowserEvent\n * leading to the box end.\n * @param {import(\"../pixel.js\").Pixel} startPixel The starting pixel of the box.\n * @param {import(\"../pixel.js\").Pixel} endPixel The end pixel of the box.\n * @return {boolean} Whether or not the boxend condition should be fired.\n */\n defaultBoxEndCondition(mapBrowserEvent, startPixel, endPixel) {\n const width = endPixel[0] - startPixel[0];\n const height = endPixel[1] - startPixel[1];\n return width * width + height * height >= this.minArea_;\n }\n\n /**\n * Returns geometry of last drawn box.\n * @return {import(\"../geom/Polygon.js\").default} Geometry.\n * @api\n */\n getGeometry() {\n return this.box_.getGeometry();\n }\n\n /**\n * Handle pointer drag events.\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n */\n handleDragEvent(mapBrowserEvent) {\n this.box_.setPixels(this.startPixel_, mapBrowserEvent.pixel);\n\n this.dispatchEvent(\n new DragBoxEvent(\n DragBoxEventType.BOXDRAG,\n mapBrowserEvent.coordinate,\n mapBrowserEvent\n )\n );\n }\n\n /**\n * Handle pointer up events.\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n * @return {boolean} If the event was consumed.\n */\n handleUpEvent(mapBrowserEvent) {\n this.box_.setMap(null);\n\n const completeBox = this.boxEndCondition_(\n mapBrowserEvent,\n this.startPixel_,\n mapBrowserEvent.pixel\n );\n if (completeBox) {\n this.onBoxEnd(mapBrowserEvent);\n }\n this.dispatchEvent(\n new DragBoxEvent(\n completeBox ? DragBoxEventType.BOXEND : DragBoxEventType.BOXCANCEL,\n mapBrowserEvent.coordinate,\n mapBrowserEvent\n )\n );\n return false;\n }\n\n /**\n * Handle pointer down events.\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n * @return {boolean} If the event was consumed.\n */\n handleDownEvent(mapBrowserEvent) {\n if (this.condition_(mapBrowserEvent)) {\n this.startPixel_ = mapBrowserEvent.pixel;\n this.box_.setMap(mapBrowserEvent.map);\n this.box_.setPixels(this.startPixel_, this.startPixel_);\n this.dispatchEvent(\n new DragBoxEvent(\n DragBoxEventType.BOXSTART,\n mapBrowserEvent.coordinate,\n mapBrowserEvent\n )\n );\n return true;\n }\n return false;\n }\n\n /**\n * Function to execute just before `onboxend` is fired\n * @param {import(\"../MapBrowserEvent.js\").default} event Event.\n */\n onBoxEnd(event) {}\n}\n\nexport default DragBox;\n","/**\n * @module ol/interaction/DragZoom\n */\nimport DragBox from './DragBox.js';\nimport {easeOut} from '../easing.js';\nimport {shiftKeyOnly} from '../events/condition.js';\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-dragzoom'] CSS class name for styling the\n * box.\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled.\n * Default is {@link module:ol/events/condition.shiftKeyOnly}.\n * @property {number} [duration=200] Animation duration in milliseconds.\n * @property {boolean} [out=false] Use interaction for zooming out.\n * @property {number} [minArea=64] The minimum area of the box in pixel, this value is used by the parent default\n * `boxEndCondition` function.\n */\n\n/**\n * @classdesc\n * Allows the user to zoom the map by clicking and dragging on the map,\n * normally combined with an {@link module:ol/events/condition} that limits\n * it to when a key, shift by default, is held down.\n *\n * To change the style of the box, use CSS and the `.ol-dragzoom` selector, or\n * your custom one configured with `className`.\n * @api\n */\nclass DragZoom extends DragBox {\n /**\n * @param {Options} [options] Options.\n */\n constructor(options) {\n options = options ? options : {};\n\n const condition = options.condition ? options.condition : shiftKeyOnly;\n\n super({\n condition: condition,\n className: options.className || 'ol-dragzoom',\n minArea: options.minArea,\n });\n\n /**\n * @private\n * @type {number}\n */\n this.duration_ = options.duration !== undefined ? options.duration : 200;\n\n /**\n * @private\n * @type {boolean}\n */\n this.out_ = options.out !== undefined ? options.out : false;\n }\n\n /**\n * Function to execute just before `onboxend` is fired\n * @param {import(\"../MapBrowserEvent.js\").default} event Event.\n */\n onBoxEnd(event) {\n const map = this.getMap();\n const view = /** @type {!import(\"../View.js\").default} */ (map.getView());\n let geometry = this.getGeometry();\n\n if (this.out_) {\n const rotatedExtent = view.rotatedExtentForGeometry(geometry);\n const resolution = view.getResolutionForExtentInternal(rotatedExtent);\n const factor = view.getResolution() / resolution;\n geometry = geometry.clone();\n geometry.scale(factor * factor);\n }\n\n view.fitInternal(geometry, {\n duration: this.duration_,\n easing: easeOut,\n });\n }\n}\n\nexport default DragZoom;\n","/**\n * @module ol/events/KeyCode\n */\n\n/**\n * @enum {number}\n * @const\n */\nexport default {\n LEFT: 37,\n UP: 38,\n RIGHT: 39,\n DOWN: 40,\n};\n","/**\n * @module ol/interaction/KeyboardPan\n */\nimport EventType from '../events/EventType.js';\nimport Interaction, {pan} from './Interaction.js';\nimport KeyCode from '../events/KeyCode.js';\nimport {noModifierKeys, targetNotEditable} from '../events/condition.js';\nimport {rotate as rotateCoordinate} from '../coordinate.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled. Default is\n * {@link module:ol/events/condition.noModifierKeys} and\n * {@link module:ol/events/condition.targetNotEditable}.\n * @property {number} [duration=100] Animation duration in milliseconds.\n * @property {number} [pixelDelta=128] The amount of pixels to pan on each key\n * press.\n */\n\n/**\n * @classdesc\n * Allows the user to pan the map using keyboard arrows.\n * Note that, although this interaction is by default included in maps,\n * the keys can only be used when browser focus is on the element to which\n * the keyboard events are attached. By default, this is the map div,\n * though you can change this with the `keyboardEventTarget` in\n * {@link module:ol/Map~Map}. `document` never loses focus but, for any other\n * element, focus will have to be on, and returned to, this element if the keys\n * are to function.\n * See also {@link module:ol/interaction/KeyboardZoom~KeyboardZoom}.\n * @api\n */\nclass KeyboardPan extends Interaction {\n /**\n * @param {Options} [options] Options.\n */\n constructor(options) {\n super();\n\n options = options || {};\n\n /**\n * @private\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Browser event.\n * @return {boolean} Combined condition result.\n */\n this.defaultCondition_ = function (mapBrowserEvent) {\n return (\n noModifierKeys(mapBrowserEvent) && targetNotEditable(mapBrowserEvent)\n );\n };\n\n /**\n * @private\n * @type {import(\"../events/condition.js\").Condition}\n */\n this.condition_ =\n options.condition !== undefined\n ? options.condition\n : this.defaultCondition_;\n\n /**\n * @private\n * @type {number}\n */\n this.duration_ = options.duration !== undefined ? options.duration : 100;\n\n /**\n * @private\n * @type {number}\n */\n this.pixelDelta_ =\n options.pixelDelta !== undefined ? options.pixelDelta : 128;\n }\n\n /**\n * Handles the {@link module:ol/MapBrowserEvent~MapBrowserEvent map browser event} if it was a\n * `KeyEvent`, and decides the direction to pan to (if an arrow key was\n * pressed).\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} `false` to stop event propagation.\n */\n handleEvent(mapBrowserEvent) {\n let stopEvent = false;\n if (mapBrowserEvent.type == EventType.KEYDOWN) {\n const keyEvent = /** @type {KeyboardEvent} */ (\n mapBrowserEvent.originalEvent\n );\n const keyCode = keyEvent.keyCode;\n if (\n this.condition_(mapBrowserEvent) &&\n (keyCode == KeyCode.DOWN ||\n keyCode == KeyCode.LEFT ||\n keyCode == KeyCode.RIGHT ||\n keyCode == KeyCode.UP)\n ) {\n const map = mapBrowserEvent.map;\n const view = map.getView();\n const mapUnitsDelta = view.getResolution() * this.pixelDelta_;\n let deltaX = 0,\n deltaY = 0;\n if (keyCode == KeyCode.DOWN) {\n deltaY = -mapUnitsDelta;\n } else if (keyCode == KeyCode.LEFT) {\n deltaX = -mapUnitsDelta;\n } else if (keyCode == KeyCode.RIGHT) {\n deltaX = mapUnitsDelta;\n } else {\n deltaY = mapUnitsDelta;\n }\n const delta = [deltaX, deltaY];\n rotateCoordinate(delta, view.getRotation());\n pan(view, delta, this.duration_);\n keyEvent.preventDefault();\n stopEvent = true;\n }\n }\n return !stopEvent;\n }\n}\n\nexport default KeyboardPan;\n","/**\n * @module ol/interaction/KeyboardZoom\n */\nimport EventType from '../events/EventType.js';\nimport Interaction, {zoomByDelta} from './Interaction.js';\nimport {targetNotEditable} from '../events/condition.js';\n\n/**\n * @typedef {Object} Options\n * @property {number} [duration=100] Animation duration in milliseconds.\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled. Default is\n * {@link module:ol/events/condition.targetNotEditable}.\n * @property {number} [delta=1] The zoom level delta on each key press.\n */\n\n/**\n * @classdesc\n * Allows the user to zoom the map using keyboard + and -.\n * Note that, although this interaction is by default included in maps,\n * the keys can only be used when browser focus is on the element to which\n * the keyboard events are attached. By default, this is the map div,\n * though you can change this with the `keyboardEventTarget` in\n * {@link module:ol/Map~Map}. `document` never loses focus but, for any other\n * element, focus will have to be on, and returned to, this element if the keys\n * are to function.\n * See also {@link module:ol/interaction/KeyboardPan~KeyboardPan}.\n * @api\n */\nclass KeyboardZoom extends Interaction {\n /**\n * @param {Options} [options] Options.\n */\n constructor(options) {\n super();\n\n options = options ? options : {};\n\n /**\n * @private\n * @type {import(\"../events/condition.js\").Condition}\n */\n this.condition_ = options.condition ? options.condition : targetNotEditable;\n\n /**\n * @private\n * @type {number}\n */\n this.delta_ = options.delta ? options.delta : 1;\n\n /**\n * @private\n * @type {number}\n */\n this.duration_ = options.duration !== undefined ? options.duration : 100;\n }\n\n /**\n * Handles the {@link module:ol/MapBrowserEvent~MapBrowserEvent map browser event} if it was a\n * `KeyEvent`, and decides whether to zoom in or out (depending on whether the\n * key pressed was '+' or '-').\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} `false` to stop event propagation.\n */\n handleEvent(mapBrowserEvent) {\n let stopEvent = false;\n if (\n mapBrowserEvent.type == EventType.KEYDOWN ||\n mapBrowserEvent.type == EventType.KEYPRESS\n ) {\n const keyEvent = /** @type {KeyboardEvent} */ (\n mapBrowserEvent.originalEvent\n );\n const charCode = keyEvent.charCode;\n if (\n this.condition_(mapBrowserEvent) &&\n (charCode == '+'.charCodeAt(0) || charCode == '-'.charCodeAt(0))\n ) {\n const map = mapBrowserEvent.map;\n const delta =\n charCode == '+'.charCodeAt(0) ? this.delta_ : -this.delta_;\n const view = map.getView();\n zoomByDelta(view, delta, undefined, this.duration_);\n keyEvent.preventDefault();\n stopEvent = true;\n }\n }\n return !stopEvent;\n }\n}\n\nexport default KeyboardZoom;\n","/**\n * @module ol/interaction/MouseWheelZoom\n */\nimport EventType from '../events/EventType.js';\nimport Interaction, {zoomByDelta} from './Interaction.js';\nimport {DEVICE_PIXEL_RATIO, FIREFOX} from '../has.js';\nimport {all, always, focusWithTabindex} from '../events/condition.js';\nimport {clamp} from '../math.js';\n\n/**\n * @typedef {'trackpad' | 'wheel'} Mode\n */\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled. Default is\n * {@link module:ol/events/condition.always}.\n * @property {boolean} [onFocusOnly=false] When the map's target has a `tabindex` attribute set,\n * the interaction will only handle events when the map has the focus.\n * @property {number} [maxDelta=1] Maximum mouse wheel delta.\n * @property {number} [duration=250] Animation duration in milliseconds.\n * @property {number} [timeout=80] Mouse wheel timeout duration in milliseconds.\n * @property {boolean} [useAnchor=true] Enable zooming using the mouse's\n * location as the anchor. When set to `false`, zooming in and out will zoom to\n * the center of the screen instead of zooming on the mouse's location.\n * @property {boolean} [constrainResolution=false] If true, the mouse wheel zoom\n * event will always animate to the closest zoom level after an interaction;\n * false means intermediary zoom levels are allowed.\n */\n\n/**\n * @classdesc\n * Allows the user to zoom the map by scrolling the mouse wheel.\n * @api\n */\nclass MouseWheelZoom extends Interaction {\n /**\n * @param {Options} [options] Options.\n */\n constructor(options) {\n options = options ? options : {};\n\n super(\n /** @type {import(\"./Interaction.js\").InteractionOptions} */ (options)\n );\n\n /**\n * @private\n * @type {number}\n */\n this.totalDelta_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.lastDelta_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.maxDelta_ = options.maxDelta !== undefined ? options.maxDelta : 1;\n\n /**\n * @private\n * @type {number}\n */\n this.duration_ = options.duration !== undefined ? options.duration : 250;\n\n /**\n * @private\n * @type {number}\n */\n this.timeout_ = options.timeout !== undefined ? options.timeout : 80;\n\n /**\n * @private\n * @type {boolean}\n */\n this.useAnchor_ =\n options.useAnchor !== undefined ? options.useAnchor : true;\n\n /**\n * @private\n * @type {boolean}\n */\n this.constrainResolution_ =\n options.constrainResolution !== undefined\n ? options.constrainResolution\n : false;\n\n const condition = options.condition ? options.condition : always;\n\n /**\n * @private\n * @type {import(\"../events/condition.js\").Condition}\n */\n this.condition_ = options.onFocusOnly\n ? all(focusWithTabindex, condition)\n : condition;\n\n /**\n * @private\n * @type {?import(\"../coordinate.js\").Coordinate}\n */\n this.lastAnchor_ = null;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.startTime_ = undefined;\n\n /**\n * @private\n * @type {?}\n */\n this.timeoutId_;\n\n /**\n * @private\n * @type {Mode|undefined}\n */\n this.mode_ = undefined;\n\n /**\n * Trackpad events separated by this delay will be considered separate\n * interactions.\n * @type {number}\n */\n this.trackpadEventGap_ = 400;\n\n /**\n * @type {?}\n */\n this.trackpadTimeoutId_;\n\n /**\n * The number of delta values per zoom level\n * @private\n * @type {number}\n */\n this.deltaPerZoom_ = 300;\n }\n\n /**\n * @private\n */\n endInteraction_() {\n this.trackpadTimeoutId_ = undefined;\n const map = this.getMap();\n if (!map) {\n return;\n }\n const view = map.getView();\n view.endInteraction(\n undefined,\n this.lastDelta_ ? (this.lastDelta_ > 0 ? 1 : -1) : 0,\n this.lastAnchor_\n );\n }\n\n /**\n * Handles the {@link module:ol/MapBrowserEvent~MapBrowserEvent map browser event} (if it was a mousewheel-event) and eventually\n * zooms the map.\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} `false` to stop event propagation.\n */\n handleEvent(mapBrowserEvent) {\n if (!this.condition_(mapBrowserEvent)) {\n return true;\n }\n const type = mapBrowserEvent.type;\n if (type !== EventType.WHEEL) {\n return true;\n }\n\n const map = mapBrowserEvent.map;\n const wheelEvent = /** @type {WheelEvent} */ (\n mapBrowserEvent.originalEvent\n );\n wheelEvent.preventDefault();\n\n if (this.useAnchor_) {\n this.lastAnchor_ = mapBrowserEvent.coordinate;\n }\n\n // Delta normalisation inspired by\n // https://github.com/mapbox/mapbox-gl-js/blob/001c7b9/js/ui/handler/scroll_zoom.js\n let delta;\n if (mapBrowserEvent.type == EventType.WHEEL) {\n delta = wheelEvent.deltaY;\n if (FIREFOX && wheelEvent.deltaMode === WheelEvent.DOM_DELTA_PIXEL) {\n delta /= DEVICE_PIXEL_RATIO;\n }\n if (wheelEvent.deltaMode === WheelEvent.DOM_DELTA_LINE) {\n delta *= 40;\n }\n }\n\n if (delta === 0) {\n return false;\n }\n this.lastDelta_ = delta;\n\n const now = Date.now();\n\n if (this.startTime_ === undefined) {\n this.startTime_ = now;\n }\n\n if (!this.mode_ || now - this.startTime_ > this.trackpadEventGap_) {\n this.mode_ = Math.abs(delta) < 4 ? 'trackpad' : 'wheel';\n }\n\n const view = map.getView();\n if (\n this.mode_ === 'trackpad' &&\n !(view.getConstrainResolution() || this.constrainResolution_)\n ) {\n if (this.trackpadTimeoutId_) {\n clearTimeout(this.trackpadTimeoutId_);\n } else {\n if (view.getAnimating()) {\n view.cancelAnimations();\n }\n view.beginInteraction();\n }\n this.trackpadTimeoutId_ = setTimeout(\n this.endInteraction_.bind(this),\n this.timeout_\n );\n view.adjustZoom(-delta / this.deltaPerZoom_, this.lastAnchor_);\n this.startTime_ = now;\n return false;\n }\n\n this.totalDelta_ += delta;\n\n const timeLeft = Math.max(this.timeout_ - (now - this.startTime_), 0);\n\n clearTimeout(this.timeoutId_);\n this.timeoutId_ = setTimeout(\n this.handleWheelZoom_.bind(this, map),\n timeLeft\n );\n\n return false;\n }\n\n /**\n * @private\n * @param {import(\"../Map.js\").default} map Map.\n */\n handleWheelZoom_(map) {\n const view = map.getView();\n if (view.getAnimating()) {\n view.cancelAnimations();\n }\n let delta =\n -clamp(\n this.totalDelta_,\n -this.maxDelta_ * this.deltaPerZoom_,\n this.maxDelta_ * this.deltaPerZoom_\n ) / this.deltaPerZoom_;\n if (view.getConstrainResolution() || this.constrainResolution_) {\n // view has a zoom constraint, zoom by 1\n delta = delta ? (delta > 0 ? 1 : -1) : 0;\n }\n zoomByDelta(view, delta, this.lastAnchor_, this.duration_);\n\n this.mode_ = undefined;\n this.totalDelta_ = 0;\n this.lastAnchor_ = null;\n this.startTime_ = undefined;\n this.timeoutId_ = undefined;\n }\n\n /**\n * Enable or disable using the mouse's location as an anchor when zooming\n * @param {boolean} useAnchor true to zoom to the mouse's location, false\n * to zoom to the center of the map\n * @api\n */\n setMouseAnchor(useAnchor) {\n this.useAnchor_ = useAnchor;\n if (!useAnchor) {\n this.lastAnchor_ = null;\n }\n }\n}\n\nexport default MouseWheelZoom;\n","/**\n * @module ol/interaction/PinchRotate\n */\nimport PointerInteraction, {\n centroid as centroidFromPointers,\n} from './Pointer.js';\nimport {FALSE} from '../functions.js';\nimport {disable} from '../rotationconstraint.js';\n\n/**\n * @typedef {Object} Options\n * @property {number} [duration=250] The duration of the animation in\n * milliseconds.\n * @property {number} [threshold=0.3] Minimal angle in radians to start a rotation.\n */\n\n/**\n * @classdesc\n * Allows the user to rotate the map by twisting with two fingers\n * on a touch screen.\n * @api\n */\nclass PinchRotate extends PointerInteraction {\n /**\n * @param {Options} [options] Options.\n */\n constructor(options) {\n options = options ? options : {};\n\n const pointerOptions = /** @type {import(\"./Pointer.js\").Options} */ (\n options\n );\n\n if (!pointerOptions.stopDown) {\n pointerOptions.stopDown = FALSE;\n }\n\n super(pointerOptions);\n\n /**\n * @private\n * @type {import(\"../coordinate.js\").Coordinate}\n */\n this.anchor_ = null;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.lastAngle_ = undefined;\n\n /**\n * @private\n * @type {boolean}\n */\n this.rotating_ = false;\n\n /**\n * @private\n * @type {number}\n */\n this.rotationDelta_ = 0.0;\n\n /**\n * @private\n * @type {number}\n */\n this.threshold_ = options.threshold !== undefined ? options.threshold : 0.3;\n\n /**\n * @private\n * @type {number}\n */\n this.duration_ = options.duration !== undefined ? options.duration : 250;\n }\n\n /**\n * Handle pointer drag events.\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n */\n handleDragEvent(mapBrowserEvent) {\n let rotationDelta = 0.0;\n\n const touch0 = this.targetPointers[0];\n const touch1 = this.targetPointers[1];\n\n // angle between touches\n const angle = Math.atan2(\n touch1.clientY - touch0.clientY,\n touch1.clientX - touch0.clientX\n );\n\n if (this.lastAngle_ !== undefined) {\n const delta = angle - this.lastAngle_;\n this.rotationDelta_ += delta;\n if (!this.rotating_ && Math.abs(this.rotationDelta_) > this.threshold_) {\n this.rotating_ = true;\n }\n rotationDelta = delta;\n }\n this.lastAngle_ = angle;\n\n const map = mapBrowserEvent.map;\n const view = map.getView();\n if (view.getConstraints().rotation === disable) {\n return;\n }\n\n // rotate anchor point.\n // FIXME: should be the intersection point between the lines:\n // touch0,touch1 and previousTouch0,previousTouch1\n this.anchor_ = map.getCoordinateFromPixelInternal(\n map.getEventPixel(centroidFromPointers(this.targetPointers))\n );\n\n // rotate\n if (this.rotating_) {\n map.render();\n view.adjustRotationInternal(rotationDelta, this.anchor_);\n }\n }\n\n /**\n * Handle pointer up events.\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n * @return {boolean} If the event was consumed.\n */\n handleUpEvent(mapBrowserEvent) {\n if (this.targetPointers.length < 2) {\n const map = mapBrowserEvent.map;\n const view = map.getView();\n view.endInteraction(this.duration_);\n return false;\n }\n return true;\n }\n\n /**\n * Handle pointer down events.\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n * @return {boolean} If the event was consumed.\n */\n handleDownEvent(mapBrowserEvent) {\n if (this.targetPointers.length >= 2) {\n const map = mapBrowserEvent.map;\n this.anchor_ = null;\n this.lastAngle_ = undefined;\n this.rotating_ = false;\n this.rotationDelta_ = 0.0;\n if (!this.handlingDownUpSequence) {\n map.getView().beginInteraction();\n }\n return true;\n }\n return false;\n }\n}\n\nexport default PinchRotate;\n","/**\n * @module ol/interaction/PinchZoom\n */\nimport PointerInteraction, {\n centroid as centroidFromPointers,\n} from './Pointer.js';\nimport {FALSE} from '../functions.js';\n\n/**\n * @typedef {Object} Options\n * @property {number} [duration=400] Animation duration in milliseconds.\n */\n\n/**\n * @classdesc\n * Allows the user to zoom the map by pinching with two fingers\n * on a touch screen.\n * @api\n */\nclass PinchZoom extends PointerInteraction {\n /**\n * @param {Options} [options] Options.\n */\n constructor(options) {\n options = options ? options : {};\n\n const pointerOptions = /** @type {import(\"./Pointer.js\").Options} */ (\n options\n );\n\n if (!pointerOptions.stopDown) {\n pointerOptions.stopDown = FALSE;\n }\n\n super(pointerOptions);\n\n /**\n * @private\n * @type {import(\"../coordinate.js\").Coordinate}\n */\n this.anchor_ = null;\n\n /**\n * @private\n * @type {number}\n */\n this.duration_ = options.duration !== undefined ? options.duration : 400;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.lastDistance_ = undefined;\n\n /**\n * @private\n * @type {number}\n */\n this.lastScaleDelta_ = 1;\n }\n\n /**\n * Handle pointer drag events.\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n */\n handleDragEvent(mapBrowserEvent) {\n let scaleDelta = 1.0;\n\n const touch0 = this.targetPointers[0];\n const touch1 = this.targetPointers[1];\n const dx = touch0.clientX - touch1.clientX;\n const dy = touch0.clientY - touch1.clientY;\n\n // distance between touches\n const distance = Math.sqrt(dx * dx + dy * dy);\n\n if (this.lastDistance_ !== undefined) {\n scaleDelta = this.lastDistance_ / distance;\n }\n this.lastDistance_ = distance;\n\n const map = mapBrowserEvent.map;\n const view = map.getView();\n\n if (scaleDelta != 1.0) {\n this.lastScaleDelta_ = scaleDelta;\n }\n\n // scale anchor point.\n this.anchor_ = map.getCoordinateFromPixelInternal(\n map.getEventPixel(centroidFromPointers(this.targetPointers))\n );\n\n // scale, bypass the resolution constraint\n map.render();\n view.adjustResolutionInternal(scaleDelta, this.anchor_);\n }\n\n /**\n * Handle pointer up events.\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n * @return {boolean} If the event was consumed.\n */\n handleUpEvent(mapBrowserEvent) {\n if (this.targetPointers.length < 2) {\n const map = mapBrowserEvent.map;\n const view = map.getView();\n const direction = this.lastScaleDelta_ > 1 ? 1 : -1;\n view.endInteraction(this.duration_, direction);\n return false;\n }\n return true;\n }\n\n /**\n * Handle pointer down events.\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n * @return {boolean} If the event was consumed.\n */\n handleDownEvent(mapBrowserEvent) {\n if (this.targetPointers.length >= 2) {\n const map = mapBrowserEvent.map;\n this.anchor_ = null;\n this.lastDistance_ = undefined;\n this.lastScaleDelta_ = 1;\n if (!this.handlingDownUpSequence) {\n map.getView().beginInteraction();\n }\n return true;\n }\n return false;\n }\n}\n\nexport default PinchZoom;\n","/**\n * @module ol/interaction/defaults\n */\nimport Collection from '../Collection.js';\nimport DoubleClickZoom from './DoubleClickZoom.js';\nimport DragPan from './DragPan.js';\nimport DragRotate from './DragRotate.js';\nimport DragZoom from './DragZoom.js';\nimport KeyboardPan from './KeyboardPan.js';\nimport KeyboardZoom from './KeyboardZoom.js';\nimport Kinetic from '../Kinetic.js';\nimport MouseWheelZoom from './MouseWheelZoom.js';\nimport PinchRotate from './PinchRotate.js';\nimport PinchZoom from './PinchZoom.js';\n\n/**\n * @typedef {Object} DefaultsOptions\n * @property {boolean} [altShiftDragRotate=true] Whether Alt-Shift-drag rotate is\n * desired.\n * @property {boolean} [onFocusOnly=false] Interact only when the map has the\n * focus. This affects the `MouseWheelZoom` and `DragPan` interactions and is\n * useful when page scroll is desired for maps that do not have the browser's\n * focus.\n * @property {boolean} [doubleClickZoom=true] Whether double click zoom is\n * desired.\n * @property {boolean} [keyboard=true] Whether keyboard interaction is desired.\n * @property {boolean} [mouseWheelZoom=true] Whether mousewheel zoom is desired.\n * @property {boolean} [shiftDragZoom=true] Whether Shift-drag zoom is desired.\n * @property {boolean} [dragPan=true] Whether drag pan is desired.\n * @property {boolean} [pinchRotate=true] Whether pinch rotate is desired.\n * @property {boolean} [pinchZoom=true] Whether pinch zoom is desired.\n * @property {number} [zoomDelta] Zoom level delta when using keyboard or double click zoom.\n * @property {number} [zoomDuration] Duration of the zoom animation in\n * milliseconds.\n */\n\n/**\n * Set of interactions included in maps by default. Specific interactions can be\n * excluded by setting the appropriate option to false in the constructor\n * options, but the order of the interactions is fixed. If you want to specify\n * a different order for interactions, you will need to create your own\n * {@link module:ol/interaction/Interaction~Interaction} instances and insert\n * them into a {@link module:ol/Collection~Collection} in the order you want\n * before creating your {@link module:ol/Map~Map} instance. Changing the order can\n * be of interest if the event propagation needs to be stopped at a point.\n * The default set of interactions, in sequence, is:\n * * {@link module:ol/interaction/DragRotate~DragRotate}\n * * {@link module:ol/interaction/DoubleClickZoom~DoubleClickZoom}\n * * {@link module:ol/interaction/DragPan~DragPan}\n * * {@link module:ol/interaction/PinchRotate~PinchRotate}\n * * {@link module:ol/interaction/PinchZoom~PinchZoom}\n * * {@link module:ol/interaction/KeyboardPan~KeyboardPan}\n * * {@link module:ol/interaction/KeyboardZoom~KeyboardZoom}\n * * {@link module:ol/interaction/MouseWheelZoom~MouseWheelZoom}\n * * {@link module:ol/interaction/DragZoom~DragZoom}\n *\n * @param {DefaultsOptions} [options] Defaults options.\n * @return {Collection}\n * A collection of interactions to be used with the {@link module:ol/Map~Map}\n * constructor's `interactions` option.\n * @api\n */\nexport function defaults(options) {\n options = options ? options : {};\n\n /** @type {Collection} */\n const interactions = new Collection();\n\n const kinetic = new Kinetic(-0.005, 0.05, 100);\n\n const altShiftDragRotate =\n options.altShiftDragRotate !== undefined\n ? options.altShiftDragRotate\n : true;\n if (altShiftDragRotate) {\n interactions.push(new DragRotate());\n }\n\n const doubleClickZoom =\n options.doubleClickZoom !== undefined ? options.doubleClickZoom : true;\n if (doubleClickZoom) {\n interactions.push(\n new DoubleClickZoom({\n delta: options.zoomDelta,\n duration: options.zoomDuration,\n })\n );\n }\n\n const dragPan = options.dragPan !== undefined ? options.dragPan : true;\n if (dragPan) {\n interactions.push(\n new DragPan({\n onFocusOnly: options.onFocusOnly,\n kinetic: kinetic,\n })\n );\n }\n\n const pinchRotate =\n options.pinchRotate !== undefined ? options.pinchRotate : true;\n if (pinchRotate) {\n interactions.push(new PinchRotate());\n }\n\n const pinchZoom = options.pinchZoom !== undefined ? options.pinchZoom : true;\n if (pinchZoom) {\n interactions.push(\n new PinchZoom({\n duration: options.zoomDuration,\n })\n );\n }\n\n const keyboard = options.keyboard !== undefined ? options.keyboard : true;\n if (keyboard) {\n interactions.push(new KeyboardPan());\n interactions.push(\n new KeyboardZoom({\n delta: options.zoomDelta,\n duration: options.zoomDuration,\n })\n );\n }\n\n const mouseWheelZoom =\n options.mouseWheelZoom !== undefined ? options.mouseWheelZoom : true;\n if (mouseWheelZoom) {\n interactions.push(\n new MouseWheelZoom({\n onFocusOnly: options.onFocusOnly,\n duration: options.zoomDuration,\n })\n );\n }\n\n const shiftDragZoom =\n options.shiftDragZoom !== undefined ? options.shiftDragZoom : true;\n if (shiftDragZoom) {\n interactions.push(\n new DragZoom({\n duration: options.zoomDuration,\n })\n );\n }\n\n return interactions;\n}\n","/**\n * @module ol/size\n */\n\n/**\n * An array of numbers representing a size: `[width, height]`.\n * @typedef {Array} Size\n * @api\n */\n\n/**\n * Returns a buffered size.\n * @param {Size} size Size.\n * @param {number} num The amount by which to buffer.\n * @param {Size} [dest] Optional reusable size array.\n * @return {Size} The buffered size.\n */\nexport function buffer(size, num, dest) {\n if (dest === undefined) {\n dest = [0, 0];\n }\n dest[0] = size[0] + 2 * num;\n dest[1] = size[1] + 2 * num;\n return dest;\n}\n\n/**\n * Determines if a size has a positive area.\n * @param {Size} size The size to test.\n * @return {boolean} The size has a positive area.\n */\nexport function hasArea(size) {\n return size[0] > 0 && size[1] > 0;\n}\n\n/**\n * Returns a size scaled by a ratio. The result will be an array of integers.\n * @param {Size} size Size.\n * @param {number} ratio Ratio.\n * @param {Size} [dest] Optional reusable size array.\n * @return {Size} The scaled size.\n */\nexport function scale(size, ratio, dest) {\n if (dest === undefined) {\n dest = [0, 0];\n }\n dest[0] = (size[0] * ratio + 0.5) | 0;\n dest[1] = (size[1] * ratio + 0.5) | 0;\n return dest;\n}\n\n/**\n * Returns an `Size` array for the passed in number (meaning: square) or\n * `Size` array.\n * (meaning: non-square),\n * @param {number|Size} size Width and height.\n * @param {Size} [dest] Optional reusable size array.\n * @return {Size} Size.\n * @api\n */\nexport function toSize(size, dest) {\n if (Array.isArray(size)) {\n return size;\n }\n if (dest === undefined) {\n dest = [size, size];\n } else {\n dest[0] = size;\n dest[1] = size;\n }\n return dest;\n}\n","/**\n * @module ol/Map\n */\nimport BaseObject from './Object.js';\nimport Collection from './Collection.js';\nimport CollectionEventType from './CollectionEventType.js';\nimport CompositeMapRenderer from './renderer/Composite.js';\nimport EventType from './events/EventType.js';\nimport Layer from './layer/Layer.js';\nimport LayerGroup, {GroupEvent} from './layer/Group.js';\nimport MapBrowserEvent from './MapBrowserEvent.js';\nimport MapBrowserEventHandler from './MapBrowserEventHandler.js';\nimport MapBrowserEventType from './MapBrowserEventType.js';\nimport MapEvent from './MapEvent.js';\nimport MapEventType from './MapEventType.js';\nimport MapProperty from './MapProperty.js';\nimport ObjectEventType from './ObjectEventType.js';\nimport PointerEventType from './pointer/EventType.js';\nimport RenderEventType from './render/EventType.js';\nimport TileQueue, {getTilePriority} from './TileQueue.js';\nimport View from './View.js';\nimport ViewHint from './ViewHint.js';\nimport {DEVICE_PIXEL_RATIO, PASSIVE_EVENT_LISTENERS} from './has.js';\nimport {TRUE} from './functions.js';\nimport {\n apply as applyTransform,\n create as createTransform,\n} from './transform.js';\nimport {assert} from './asserts.js';\nimport {\n clone,\n createOrUpdateEmpty,\n equals as equalsExtent,\n getForViewAndSize,\n isEmpty,\n} from './extent.js';\nimport {defaults as defaultControls} from './control/defaults.js';\nimport {defaults as defaultInteractions} from './interaction/defaults.js';\nimport {equals} from './array.js';\nimport {fromUserCoordinate, toUserCoordinate} from './proj.js';\nimport {getUid} from './util.js';\nimport {hasArea} from './size.js';\nimport {listen, unlistenByKey} from './events.js';\nimport {removeNode} from './dom.js';\nimport {warn} from './console.js';\n\n/**\n * State of the current frame. Only `pixelRatio`, `time` and `viewState` should\n * be used in applications.\n * @typedef {Object} FrameState\n * @property {number} pixelRatio The pixel ratio of the frame.\n * @property {number} time The time when rendering of the frame was requested.\n * @property {import(\"./View.js\").State} viewState The state of the current view.\n * @property {boolean} animate Animate.\n * @property {import(\"./transform.js\").Transform} coordinateToPixelTransform CoordinateToPixelTransform.\n * @property {import(\"rbush\").default} declutterTree DeclutterTree.\n * @property {null|import(\"./extent.js\").Extent} extent Extent.\n * @property {import(\"./extent.js\").Extent} [nextExtent] Next extent during an animation series.\n * @property {number} index Index.\n * @property {Array} layerStatesArray LayerStatesArray.\n * @property {number} layerIndex LayerIndex.\n * @property {import(\"./transform.js\").Transform} pixelToCoordinateTransform PixelToCoordinateTransform.\n * @property {Array} postRenderFunctions PostRenderFunctions.\n * @property {import(\"./size.js\").Size} size Size.\n * @property {TileQueue} tileQueue TileQueue.\n * @property {!Object>} usedTiles UsedTiles.\n * @property {Array} viewHints ViewHints.\n * @property {!Object>} wantedTiles WantedTiles.\n * @property {string} mapId The id of the map.\n * @property {Object} renderTargets Identifiers of previously rendered elements.\n */\n\n/**\n * @typedef {function(Map, ?FrameState): any} PostRenderFunction\n */\n\n/**\n * @typedef {Object} AtPixelOptions\n * @property {undefined|function(import(\"./layer/Layer.js\").default): boolean} [layerFilter] Layer filter\n * function. The filter function will receive one argument, the\n * {@link module:ol/layer/Layer~Layer layer-candidate} and it should return a boolean value.\n * Only layers which are visible and for which this function returns `true`\n * will be tested for features. By default, all visible layers will be tested.\n * @property {number} [hitTolerance=0] Hit-detection tolerance in css pixels. Pixels\n * inside the radius around the given position will be checked for features.\n * @property {boolean} [checkWrapped=true] Check-Wrapped Will check for wrapped geometries inside the range of\n * +/- 1 world width. Works only if a projection is used that can be wrapped.\n */\n\n/**\n * @typedef {Object} MapOptionsInternal\n * @property {Collection} [controls] Controls.\n * @property {Collection} [interactions] Interactions.\n * @property {HTMLElement|Document} keyboardEventTarget KeyboardEventTarget.\n * @property {Collection} overlays Overlays.\n * @property {Object} values Values.\n */\n\n/**\n * @typedef {import(\"./ObjectEventType\").Types|'change:layergroup'|'change:size'|'change:target'|'change:view'} MapObjectEventTypes\n */\n\n/***\n * @template Return\n * @typedef {import(\"./Observable\").OnSignature &\n * import(\"./Observable\").OnSignature &\n * import(\"./Observable\").OnSignature &\n * import(\"./Observable\").OnSignature &\n * import(\"./Observable\").OnSignature &\n * import(\"./Observable\").CombinedOnSignature} MapEventHandler\n */\n\n/**\n * Object literal with config options for the map.\n * @typedef {Object} MapOptions\n * @property {Collection|Array} [controls]\n * Controls initially added to the map. If not specified,\n * {@link module:ol/control/defaults.defaults} is used.\n * @property {number} [pixelRatio=window.devicePixelRatio] The ratio between\n * physical pixels and device-independent pixels (dips) on the device.\n * @property {Collection|Array} [interactions]\n * Interactions that are initially added to the map. If not specified,\n * {@link module:ol/interaction/defaults.defaults} is used.\n * @property {HTMLElement|Document|string} [keyboardEventTarget] The element to\n * listen to keyboard events on. This determines when the `KeyboardPan` and\n * `KeyboardZoom` interactions trigger. For example, if this option is set to\n * `document` the keyboard interactions will always trigger. If this option is\n * not specified, the element the library listens to keyboard events on is the\n * map target (i.e. the user-provided div for the map). If this is not\n * `document`, the target element needs to be focused for key events to be\n * emitted, requiring that the target element has a `tabindex` attribute.\n * @property {Array|Collection|LayerGroup} [layers]\n * Layers. If this is not defined, a map with no layers will be rendered. Note\n * that layers are rendered in the order supplied, so if you want, for example,\n * a vector layer to appear on top of a tile layer, it must come after the tile\n * layer.\n * @property {number} [maxTilesLoading=16] Maximum number tiles to load\n * simultaneously.\n * @property {number} [moveTolerance=1] The minimum distance in pixels the\n * cursor must move to be detected as a map move event instead of a click.\n * Increasing this value can make it easier to click on the map.\n * @property {Collection|Array} [overlays]\n * Overlays initially added to the map. By default, no overlays are added.\n * @property {HTMLElement|string} [target] The container for the map, either the\n * element itself or the `id` of the element. If not specified at construction\n * time, {@link module:ol/Map~Map#setTarget} must be called for the map to be\n * rendered. If passed by element, the container can be in a secondary document.\n * **Note:** CSS `transform` support for the target element is limited to `scale`.\n * @property {View|Promise} [view] The map's view. No layer sources will be\n * fetched unless this is specified at construction time or through\n * {@link module:ol/Map~Map#setView}.\n */\n\n/**\n * @param {import(\"./layer/Base.js\").default} layer Layer.\n */\nfunction removeLayerMapProperty(layer) {\n if (layer instanceof Layer) {\n layer.setMapInternal(null);\n return;\n }\n if (layer instanceof LayerGroup) {\n layer.getLayers().forEach(removeLayerMapProperty);\n }\n}\n\n/**\n * @param {import(\"./layer/Base.js\").default} layer Layer.\n * @param {Map} map Map.\n */\nfunction setLayerMapProperty(layer, map) {\n if (layer instanceof Layer) {\n layer.setMapInternal(map);\n return;\n }\n if (layer instanceof LayerGroup) {\n const layers = layer.getLayers().getArray();\n for (let i = 0, ii = layers.length; i < ii; ++i) {\n setLayerMapProperty(layers[i], map);\n }\n }\n}\n\n/**\n * @classdesc\n * The map is the core component of OpenLayers. For a map to render, a view,\n * one or more layers, and a target container are needed:\n *\n * import Map from 'ol/Map.js';\n * import View from 'ol/View.js';\n * import TileLayer from 'ol/layer/Tile.js';\n * import OSM from 'ol/source/OSM.js';\n *\n * const map = new Map({\n * view: new View({\n * center: [0, 0],\n * zoom: 1,\n * }),\n * layers: [\n * new TileLayer({\n * source: new OSM(),\n * }),\n * ],\n * target: 'map',\n * });\n *\n * The above snippet creates a map using a {@link module:ol/layer/Tile~TileLayer} to\n * display {@link module:ol/source/OSM~OSM} OSM data and render it to a DOM\n * element with the id `map`.\n *\n * The constructor places a viewport container (with CSS class name\n * `ol-viewport`) in the target element (see `getViewport()`), and then two\n * further elements within the viewport: one with CSS class name\n * `ol-overlaycontainer-stopevent` for controls and some overlays, and one with\n * CSS class name `ol-overlaycontainer` for other overlays (see the `stopEvent`\n * option of {@link module:ol/Overlay~Overlay} for the difference). The map\n * itself is placed in a further element within the viewport.\n *\n * Layers are stored as a {@link module:ol/Collection~Collection} in\n * layerGroups. A top-level group is provided by the library. This is what is\n * accessed by `getLayerGroup` and `setLayerGroup`. Layers entered in the\n * options are added to this group, and `addLayer` and `removeLayer` change the\n * layer collection in the group. `getLayers` is a convenience function for\n * `getLayerGroup().getLayers()`. Note that {@link module:ol/layer/Group~LayerGroup}\n * is a subclass of {@link module:ol/layer/Base~BaseLayer}, so layers entered in the\n * options or added with `addLayer` can be groups, which can contain further\n * groups, and so on.\n *\n * @fires import(\"./MapBrowserEvent.js\").MapBrowserEvent\n * @fires import(\"./MapEvent.js\").MapEvent\n * @fires import(\"./render/Event.js\").default#precompose\n * @fires import(\"./render/Event.js\").default#postcompose\n * @fires import(\"./render/Event.js\").default#rendercomplete\n * @api\n */\nclass Map extends BaseObject {\n /**\n * @param {MapOptions} [options] Map options.\n */\n constructor(options) {\n super();\n\n options = options || {};\n\n /***\n * @type {MapEventHandler}\n */\n this.on;\n\n /***\n * @type {MapEventHandler}\n */\n this.once;\n\n /***\n * @type {MapEventHandler}\n */\n this.un;\n\n const optionsInternal = createOptionsInternal(options);\n\n /**\n * @private\n * @type {boolean|undefined}\n */\n this.renderComplete_;\n\n /**\n * @private\n * @type {boolean}\n */\n this.loaded_ = true;\n\n /** @private */\n this.boundHandleBrowserEvent_ = this.handleBrowserEvent.bind(this);\n\n /**\n * @type {number}\n * @private\n */\n this.maxTilesLoading_ =\n options.maxTilesLoading !== undefined ? options.maxTilesLoading : 16;\n\n /**\n * @private\n * @type {number}\n */\n this.pixelRatio_ =\n options.pixelRatio !== undefined\n ? options.pixelRatio\n : DEVICE_PIXEL_RATIO;\n\n /**\n * @private\n * @type {*}\n */\n this.postRenderTimeoutHandle_;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.animationDelayKey_;\n\n /**\n * @private\n */\n this.animationDelay_ = this.animationDelay_.bind(this);\n\n /**\n * @private\n * @type {import(\"./transform.js\").Transform}\n */\n this.coordinateToPixelTransform_ = createTransform();\n\n /**\n * @private\n * @type {import(\"./transform.js\").Transform}\n */\n this.pixelToCoordinateTransform_ = createTransform();\n\n /**\n * @private\n * @type {number}\n */\n this.frameIndex_ = 0;\n\n /**\n * @private\n * @type {?FrameState}\n */\n this.frameState_ = null;\n\n /**\n * The extent at the previous 'moveend' event.\n * @private\n * @type {import(\"./extent.js\").Extent}\n */\n this.previousExtent_ = null;\n\n /**\n * @private\n * @type {?import(\"./events.js\").EventsKey}\n */\n this.viewPropertyListenerKey_ = null;\n\n /**\n * @private\n * @type {?import(\"./events.js\").EventsKey}\n */\n this.viewChangeListenerKey_ = null;\n\n /**\n * @private\n * @type {?Array}\n */\n this.layerGroupPropertyListenerKeys_ = null;\n\n /**\n * @private\n * @type {!HTMLElement}\n */\n this.viewport_ = document.createElement('div');\n this.viewport_.className =\n 'ol-viewport' + ('ontouchstart' in window ? ' ol-touch' : '');\n this.viewport_.style.position = 'relative';\n this.viewport_.style.overflow = 'hidden';\n this.viewport_.style.width = '100%';\n this.viewport_.style.height = '100%';\n\n /**\n * @private\n * @type {!HTMLElement}\n */\n this.overlayContainer_ = document.createElement('div');\n this.overlayContainer_.style.position = 'absolute';\n this.overlayContainer_.style.zIndex = '0';\n this.overlayContainer_.style.width = '100%';\n this.overlayContainer_.style.height = '100%';\n this.overlayContainer_.style.pointerEvents = 'none';\n this.overlayContainer_.className = 'ol-overlaycontainer';\n this.viewport_.appendChild(this.overlayContainer_);\n\n /**\n * @private\n * @type {!HTMLElement}\n */\n this.overlayContainerStopEvent_ = document.createElement('div');\n this.overlayContainerStopEvent_.style.position = 'absolute';\n this.overlayContainerStopEvent_.style.zIndex = '0';\n this.overlayContainerStopEvent_.style.width = '100%';\n this.overlayContainerStopEvent_.style.height = '100%';\n this.overlayContainerStopEvent_.style.pointerEvents = 'none';\n this.overlayContainerStopEvent_.className = 'ol-overlaycontainer-stopevent';\n this.viewport_.appendChild(this.overlayContainerStopEvent_);\n\n /**\n * @private\n * @type {MapBrowserEventHandler}\n */\n this.mapBrowserEventHandler_ = null;\n\n /**\n * @private\n * @type {number}\n */\n this.moveTolerance_ = options.moveTolerance;\n\n /**\n * @private\n * @type {HTMLElement|Document}\n */\n this.keyboardEventTarget_ = optionsInternal.keyboardEventTarget;\n\n /**\n * @private\n * @type {?Array}\n */\n this.targetChangeHandlerKeys_ = null;\n\n /**\n * @private\n * @type {HTMLElement|null}\n */\n this.targetElement_ = null;\n\n /**\n * @type {ResizeObserver}\n */\n this.resizeObserver_ = new ResizeObserver(() => this.updateSize());\n\n /**\n * @type {Collection}\n * @protected\n */\n this.controls = optionsInternal.controls || defaultControls();\n\n /**\n * @type {Collection}\n * @protected\n */\n this.interactions =\n optionsInternal.interactions ||\n defaultInteractions({\n onFocusOnly: true,\n });\n\n /**\n * @type {Collection}\n * @private\n */\n this.overlays_ = optionsInternal.overlays;\n\n /**\n * A lookup of overlays by id.\n * @private\n * @type {Object}\n */\n this.overlayIdIndex_ = {};\n\n /**\n * @type {import(\"./renderer/Map.js\").default|null}\n * @private\n */\n this.renderer_ = null;\n\n /**\n * @private\n * @type {!Array}\n */\n this.postRenderFunctions_ = [];\n\n /**\n * @private\n * @type {TileQueue}\n */\n this.tileQueue_ = new TileQueue(\n this.getTilePriority.bind(this),\n this.handleTileChange_.bind(this)\n );\n\n this.addChangeListener(\n MapProperty.LAYERGROUP,\n this.handleLayerGroupChanged_\n );\n this.addChangeListener(MapProperty.VIEW, this.handleViewChanged_);\n this.addChangeListener(MapProperty.SIZE, this.handleSizeChanged_);\n this.addChangeListener(MapProperty.TARGET, this.handleTargetChanged_);\n\n // setProperties will trigger the rendering of the map if the map\n // is \"defined\" already.\n this.setProperties(optionsInternal.values);\n\n const map = this;\n if (options.view && !(options.view instanceof View)) {\n options.view.then(function (viewOptions) {\n map.setView(new View(viewOptions));\n });\n }\n\n this.controls.addEventListener(\n CollectionEventType.ADD,\n /**\n * @param {import(\"./Collection.js\").CollectionEvent} event CollectionEvent\n */\n (event) => {\n event.element.setMap(this);\n }\n );\n\n this.controls.addEventListener(\n CollectionEventType.REMOVE,\n /**\n * @param {import(\"./Collection.js\").CollectionEvent} event CollectionEvent.\n */\n (event) => {\n event.element.setMap(null);\n }\n );\n\n this.interactions.addEventListener(\n CollectionEventType.ADD,\n /**\n * @param {import(\"./Collection.js\").CollectionEvent} event CollectionEvent.\n */\n (event) => {\n event.element.setMap(this);\n }\n );\n\n this.interactions.addEventListener(\n CollectionEventType.REMOVE,\n /**\n * @param {import(\"./Collection.js\").CollectionEvent} event CollectionEvent.\n */\n (event) => {\n event.element.setMap(null);\n }\n );\n\n this.overlays_.addEventListener(\n CollectionEventType.ADD,\n /**\n * @param {import(\"./Collection.js\").CollectionEvent} event CollectionEvent.\n */\n (event) => {\n this.addOverlayInternal_(event.element);\n }\n );\n\n this.overlays_.addEventListener(\n CollectionEventType.REMOVE,\n /**\n * @param {import(\"./Collection.js\").CollectionEvent} event CollectionEvent.\n */\n (event) => {\n const id = event.element.getId();\n if (id !== undefined) {\n delete this.overlayIdIndex_[id.toString()];\n }\n event.element.setMap(null);\n }\n );\n\n this.controls.forEach(\n /**\n * @param {import(\"./control/Control.js\").default} control Control.\n */\n (control) => {\n control.setMap(this);\n }\n );\n\n this.interactions.forEach(\n /**\n * @param {import(\"./interaction/Interaction.js\").default} interaction Interaction.\n */\n (interaction) => {\n interaction.setMap(this);\n }\n );\n\n this.overlays_.forEach(this.addOverlayInternal_.bind(this));\n }\n\n /**\n * Add the given control to the map.\n * @param {import(\"./control/Control.js\").default} control Control.\n * @api\n */\n addControl(control) {\n this.getControls().push(control);\n }\n\n /**\n * Add the given interaction to the map. If you want to add an interaction\n * at another point of the collection use `getInteractions()` and the methods\n * available on {@link module:ol/Collection~Collection}. This can be used to\n * stop the event propagation from the handleEvent function. The interactions\n * get to handle the events in the reverse order of this collection.\n * @param {import(\"./interaction/Interaction.js\").default} interaction Interaction to add.\n * @api\n */\n addInteraction(interaction) {\n this.getInteractions().push(interaction);\n }\n\n /**\n * Adds the given layer to the top of this map. If you want to add a layer\n * elsewhere in the stack, use `getLayers()` and the methods available on\n * {@link module:ol/Collection~Collection}.\n * @param {import(\"./layer/Base.js\").default} layer Layer.\n * @api\n */\n addLayer(layer) {\n const layers = this.getLayerGroup().getLayers();\n layers.push(layer);\n }\n\n /**\n * @param {import(\"./layer/Group.js\").GroupEvent} event The layer add event.\n * @private\n */\n handleLayerAdd_(event) {\n setLayerMapProperty(event.layer, this);\n }\n\n /**\n * Add the given overlay to the map.\n * @param {import(\"./Overlay.js\").default} overlay Overlay.\n * @api\n */\n addOverlay(overlay) {\n this.getOverlays().push(overlay);\n }\n\n /**\n * This deals with map's overlay collection changes.\n * @param {import(\"./Overlay.js\").default} overlay Overlay.\n * @private\n */\n addOverlayInternal_(overlay) {\n const id = overlay.getId();\n if (id !== undefined) {\n this.overlayIdIndex_[id.toString()] = overlay;\n }\n overlay.setMap(this);\n }\n\n /**\n *\n * Clean up.\n */\n disposeInternal() {\n this.controls.clear();\n this.interactions.clear();\n this.overlays_.clear();\n this.resizeObserver_.disconnect();\n this.setTarget(null);\n super.disposeInternal();\n }\n\n /**\n * Detect features that intersect a pixel on the viewport, and execute a\n * callback with each intersecting feature. Layers included in the detection can\n * be configured through the `layerFilter` option in `options`.\n * @param {import(\"./pixel.js\").Pixel} pixel Pixel.\n * @param {function(import(\"./Feature.js\").FeatureLike, import(\"./layer/Layer.js\").default, import(\"./geom/SimpleGeometry.js\").default): T} callback Feature callback. The callback will be\n * called with two arguments. The first argument is one\n * {@link module:ol/Feature~Feature feature} or\n * {@link module:ol/render/Feature~RenderFeature render feature} at the pixel, the second is\n * the {@link module:ol/layer/Layer~Layer layer} of the feature and will be null for\n * unmanaged layers. To stop detection, callback functions can return a\n * truthy value.\n * @param {AtPixelOptions} [options] Optional options.\n * @return {T|undefined} Callback result, i.e. the return value of last\n * callback execution, or the first truthy callback return value.\n * @template T\n * @api\n */\n forEachFeatureAtPixel(pixel, callback, options) {\n if (!this.frameState_ || !this.renderer_) {\n return;\n }\n const coordinate = this.getCoordinateFromPixelInternal(pixel);\n options = options !== undefined ? options : {};\n const hitTolerance =\n options.hitTolerance !== undefined ? options.hitTolerance : 0;\n const layerFilter =\n options.layerFilter !== undefined ? options.layerFilter : TRUE;\n const checkWrapped = options.checkWrapped !== false;\n return this.renderer_.forEachFeatureAtCoordinate(\n coordinate,\n this.frameState_,\n hitTolerance,\n checkWrapped,\n callback,\n null,\n layerFilter,\n null\n );\n }\n\n /**\n * Get all features that intersect a pixel on the viewport.\n * @param {import(\"./pixel.js\").Pixel} pixel Pixel.\n * @param {AtPixelOptions} [options] Optional options.\n * @return {Array} The detected features or\n * an empty array if none were found.\n * @api\n */\n getFeaturesAtPixel(pixel, options) {\n const features = [];\n this.forEachFeatureAtPixel(\n pixel,\n function (feature) {\n features.push(feature);\n },\n options\n );\n return features;\n }\n\n /**\n * Get all layers from all layer groups.\n * @return {Array} Layers.\n * @api\n */\n getAllLayers() {\n const layers = [];\n function addLayersFrom(layerGroup) {\n layerGroup.forEach(function (layer) {\n if (layer instanceof LayerGroup) {\n addLayersFrom(layer.getLayers());\n } else {\n layers.push(layer);\n }\n });\n }\n addLayersFrom(this.getLayers());\n return layers;\n }\n\n /**\n * Detect if features intersect a pixel on the viewport. Layers included in the\n * detection can be configured through the `layerFilter` option.\n * @param {import(\"./pixel.js\").Pixel} pixel Pixel.\n * @param {AtPixelOptions} [options] Optional options.\n * @return {boolean} Is there a feature at the given pixel?\n * @api\n */\n hasFeatureAtPixel(pixel, options) {\n if (!this.frameState_ || !this.renderer_) {\n return false;\n }\n const coordinate = this.getCoordinateFromPixelInternal(pixel);\n options = options !== undefined ? options : {};\n const layerFilter =\n options.layerFilter !== undefined ? options.layerFilter : TRUE;\n const hitTolerance =\n options.hitTolerance !== undefined ? options.hitTolerance : 0;\n const checkWrapped = options.checkWrapped !== false;\n return this.renderer_.hasFeatureAtCoordinate(\n coordinate,\n this.frameState_,\n hitTolerance,\n checkWrapped,\n layerFilter,\n null\n );\n }\n\n /**\n * Returns the coordinate in user projection for a browser event.\n * @param {MouseEvent} event Event.\n * @return {import(\"./coordinate.js\").Coordinate} Coordinate.\n * @api\n */\n getEventCoordinate(event) {\n return this.getCoordinateFromPixel(this.getEventPixel(event));\n }\n\n /**\n * Returns the coordinate in view projection for a browser event.\n * @param {MouseEvent} event Event.\n * @return {import(\"./coordinate.js\").Coordinate} Coordinate.\n */\n getEventCoordinateInternal(event) {\n return this.getCoordinateFromPixelInternal(this.getEventPixel(event));\n }\n\n /**\n * Returns the map pixel position for a browser event relative to the viewport.\n * @param {UIEvent|{clientX: number, clientY: number}} event Event.\n * @return {import(\"./pixel.js\").Pixel} Pixel.\n * @api\n */\n getEventPixel(event) {\n const viewport = this.viewport_;\n const viewportPosition = viewport.getBoundingClientRect();\n const viewportSize = this.getSize();\n const scaleX = viewportPosition.width / viewportSize[0];\n const scaleY = viewportPosition.height / viewportSize[1];\n const eventPosition =\n //FIXME Are we really calling this with a TouchEvent anywhere?\n 'changedTouches' in event\n ? /** @type {TouchEvent} */ (event).changedTouches[0]\n : /** @type {MouseEvent} */ (event);\n\n return [\n (eventPosition.clientX - viewportPosition.left) / scaleX,\n (eventPosition.clientY - viewportPosition.top) / scaleY,\n ];\n }\n\n /**\n * Get the target in which this map is rendered.\n * Note that this returns what is entered as an option or in setTarget:\n * if that was an element, it returns an element; if a string, it returns that.\n * @return {HTMLElement|string|undefined} The Element or id of the Element that the\n * map is rendered in.\n * @observable\n * @api\n */\n getTarget() {\n return /** @type {HTMLElement|string|undefined} */ (\n this.get(MapProperty.TARGET)\n );\n }\n\n /**\n * Get the DOM element into which this map is rendered. In contrast to\n * `getTarget` this method always return an `Element`, or `null` if the\n * map has no target.\n * @return {HTMLElement} The element that the map is rendered in.\n * @api\n */\n getTargetElement() {\n return this.targetElement_;\n }\n\n /**\n * Get the coordinate for a given pixel. This returns a coordinate in the\n * user projection.\n * @param {import(\"./pixel.js\").Pixel} pixel Pixel position in the map viewport.\n * @return {import(\"./coordinate.js\").Coordinate} The coordinate for the pixel position.\n * @api\n */\n getCoordinateFromPixel(pixel) {\n return toUserCoordinate(\n this.getCoordinateFromPixelInternal(pixel),\n this.getView().getProjection()\n );\n }\n\n /**\n * Get the coordinate for a given pixel. This returns a coordinate in the\n * map view projection.\n * @param {import(\"./pixel.js\").Pixel} pixel Pixel position in the map viewport.\n * @return {import(\"./coordinate.js\").Coordinate} The coordinate for the pixel position.\n */\n getCoordinateFromPixelInternal(pixel) {\n const frameState = this.frameState_;\n if (!frameState) {\n return null;\n }\n return applyTransform(frameState.pixelToCoordinateTransform, pixel.slice());\n }\n\n /**\n * Get the map controls. Modifying this collection changes the controls\n * associated with the map.\n * @return {Collection} Controls.\n * @api\n */\n getControls() {\n return this.controls;\n }\n\n /**\n * Get the map overlays. Modifying this collection changes the overlays\n * associated with the map.\n * @return {Collection} Overlays.\n * @api\n */\n getOverlays() {\n return this.overlays_;\n }\n\n /**\n * Get an overlay by its identifier (the value returned by overlay.getId()).\n * Note that the index treats string and numeric identifiers as the same. So\n * `map.getOverlayById(2)` will return an overlay with id `'2'` or `2`.\n * @param {string|number} id Overlay identifier.\n * @return {import(\"./Overlay.js\").default} Overlay.\n * @api\n */\n getOverlayById(id) {\n const overlay = this.overlayIdIndex_[id.toString()];\n return overlay !== undefined ? overlay : null;\n }\n\n /**\n * Get the map interactions. Modifying this collection changes the interactions\n * associated with the map.\n *\n * Interactions are used for e.g. pan, zoom and rotate.\n * @return {Collection} Interactions.\n * @api\n */\n getInteractions() {\n return this.interactions;\n }\n\n /**\n * Get the layergroup associated with this map.\n * @return {LayerGroup} A layer group containing the layers in this map.\n * @observable\n * @api\n */\n getLayerGroup() {\n return /** @type {LayerGroup} */ (this.get(MapProperty.LAYERGROUP));\n }\n\n /**\n * Clear any existing layers and add layers to the map.\n * @param {Array|Collection} layers The layers to be added to the map.\n * @api\n */\n setLayers(layers) {\n const group = this.getLayerGroup();\n if (layers instanceof Collection) {\n group.setLayers(layers);\n return;\n }\n\n const collection = group.getLayers();\n collection.clear();\n collection.extend(layers);\n }\n\n /**\n * Get the collection of layers associated with this map.\n * @return {!Collection} Layers.\n * @api\n */\n getLayers() {\n const layers = this.getLayerGroup().getLayers();\n return layers;\n }\n\n /**\n * @return {boolean} Layers have sources that are still loading.\n */\n getLoadingOrNotReady() {\n const layerStatesArray = this.getLayerGroup().getLayerStatesArray();\n for (let i = 0, ii = layerStatesArray.length; i < ii; ++i) {\n const state = layerStatesArray[i];\n if (!state.visible) {\n continue;\n }\n const renderer = state.layer.getRenderer();\n if (renderer && !renderer.ready) {\n return true;\n }\n const source = state.layer.getSource();\n if (source && source.loading) {\n return true;\n }\n }\n return false;\n }\n\n /**\n * Get the pixel for a coordinate. This takes a coordinate in the user\n * projection and returns the corresponding pixel.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate A map coordinate.\n * @return {import(\"./pixel.js\").Pixel} A pixel position in the map viewport.\n * @api\n */\n getPixelFromCoordinate(coordinate) {\n const viewCoordinate = fromUserCoordinate(\n coordinate,\n this.getView().getProjection()\n );\n return this.getPixelFromCoordinateInternal(viewCoordinate);\n }\n\n /**\n * Get the pixel for a coordinate. This takes a coordinate in the map view\n * projection and returns the corresponding pixel.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate A map coordinate.\n * @return {import(\"./pixel.js\").Pixel} A pixel position in the map viewport.\n */\n getPixelFromCoordinateInternal(coordinate) {\n const frameState = this.frameState_;\n if (!frameState) {\n return null;\n }\n return applyTransform(\n frameState.coordinateToPixelTransform,\n coordinate.slice(0, 2)\n );\n }\n\n /**\n * Get the map renderer.\n * @return {import(\"./renderer/Map.js\").default|null} Renderer\n */\n getRenderer() {\n return this.renderer_;\n }\n\n /**\n * Get the size of this map.\n * @return {import(\"./size.js\").Size|undefined} The size in pixels of the map in the DOM.\n * @observable\n * @api\n */\n getSize() {\n return /** @type {import(\"./size.js\").Size|undefined} */ (\n this.get(MapProperty.SIZE)\n );\n }\n\n /**\n * Get the view associated with this map. A view manages properties such as\n * center and resolution.\n * @return {View} The view that controls this map.\n * @observable\n * @api\n */\n getView() {\n return /** @type {View} */ (this.get(MapProperty.VIEW));\n }\n\n /**\n * Get the element that serves as the map viewport.\n * @return {HTMLElement} Viewport.\n * @api\n */\n getViewport() {\n return this.viewport_;\n }\n\n /**\n * Get the element that serves as the container for overlays. Elements added to\n * this container will let mousedown and touchstart events through to the map,\n * so clicks and gestures on an overlay will trigger {@link module:ol/MapBrowserEvent~MapBrowserEvent}\n * events.\n * @return {!HTMLElement} The map's overlay container.\n */\n getOverlayContainer() {\n return this.overlayContainer_;\n }\n\n /**\n * Get the element that serves as a container for overlays that don't allow\n * event propagation. Elements added to this container won't let mousedown and\n * touchstart events through to the map, so clicks and gestures on an overlay\n * don't trigger any {@link module:ol/MapBrowserEvent~MapBrowserEvent}.\n * @return {!HTMLElement} The map's overlay container that stops events.\n */\n getOverlayContainerStopEvent() {\n return this.overlayContainerStopEvent_;\n }\n\n /**\n * @return {!Document} The document where the map is displayed.\n */\n getOwnerDocument() {\n const targetElement = this.getTargetElement();\n return targetElement ? targetElement.ownerDocument : document;\n }\n\n /**\n * @param {import(\"./Tile.js\").default} tile Tile.\n * @param {string} tileSourceKey Tile source key.\n * @param {import(\"./coordinate.js\").Coordinate} tileCenter Tile center.\n * @param {number} tileResolution Tile resolution.\n * @return {number} Tile priority.\n */\n getTilePriority(tile, tileSourceKey, tileCenter, tileResolution) {\n return getTilePriority(\n this.frameState_,\n tile,\n tileSourceKey,\n tileCenter,\n tileResolution\n );\n }\n\n /**\n * @param {UIEvent} browserEvent Browser event.\n * @param {string} [type] Type.\n */\n handleBrowserEvent(browserEvent, type) {\n type = type || browserEvent.type;\n const mapBrowserEvent = new MapBrowserEvent(type, this, browserEvent);\n this.handleMapBrowserEvent(mapBrowserEvent);\n }\n\n /**\n * @param {MapBrowserEvent} mapBrowserEvent The event to handle.\n */\n handleMapBrowserEvent(mapBrowserEvent) {\n if (!this.frameState_) {\n // With no view defined, we cannot translate pixels into geographical\n // coordinates so interactions cannot be used.\n return;\n }\n const originalEvent = /** @type {PointerEvent} */ (\n mapBrowserEvent.originalEvent\n );\n const eventType = originalEvent.type;\n if (\n eventType === PointerEventType.POINTERDOWN ||\n eventType === EventType.WHEEL ||\n eventType === EventType.KEYDOWN\n ) {\n const doc = this.getOwnerDocument();\n const rootNode = this.viewport_.getRootNode\n ? this.viewport_.getRootNode()\n : doc;\n const target = /** @type {Node} */ (originalEvent.target);\n if (\n // Abort if the target is a child of the container for elements whose events are not meant\n // to be handled by map interactions.\n this.overlayContainerStopEvent_.contains(target) ||\n // Abort if the event target is a child of the container that is no longer in the page.\n // It's possible for the target to no longer be in the page if it has been removed in an\n // event listener, this might happen in a Control that recreates it's content based on\n // user interaction either manually or via a render in something like https://reactjs.org/\n !(rootNode === doc ? doc.documentElement : rootNode).contains(target)\n ) {\n return;\n }\n }\n mapBrowserEvent.frameState = this.frameState_;\n if (this.dispatchEvent(mapBrowserEvent) !== false) {\n const interactionsArray = this.getInteractions().getArray().slice();\n for (let i = interactionsArray.length - 1; i >= 0; i--) {\n const interaction = interactionsArray[i];\n if (\n interaction.getMap() !== this ||\n !interaction.getActive() ||\n !this.getTargetElement()\n ) {\n continue;\n }\n const cont = interaction.handleEvent(mapBrowserEvent);\n if (!cont || mapBrowserEvent.propagationStopped) {\n break;\n }\n }\n }\n }\n\n /**\n * @protected\n */\n handlePostRender() {\n const frameState = this.frameState_;\n\n // Manage the tile queue\n // Image loads are expensive and a limited resource, so try to use them\n // efficiently:\n // * When the view is static we allow a large number of parallel tile loads\n // to complete the frame as quickly as possible.\n // * When animating or interacting, image loads can cause janks, so we reduce\n // the maximum number of loads per frame and limit the number of parallel\n // tile loads to remain reactive to view changes and to reduce the chance of\n // loading tiles that will quickly disappear from view.\n const tileQueue = this.tileQueue_;\n if (!tileQueue.isEmpty()) {\n let maxTotalLoading = this.maxTilesLoading_;\n let maxNewLoads = maxTotalLoading;\n if (frameState) {\n const hints = frameState.viewHints;\n if (hints[ViewHint.ANIMATING] || hints[ViewHint.INTERACTING]) {\n const lowOnFrameBudget = Date.now() - frameState.time > 8;\n maxTotalLoading = lowOnFrameBudget ? 0 : 8;\n maxNewLoads = lowOnFrameBudget ? 0 : 2;\n }\n }\n if (tileQueue.getTilesLoading() < maxTotalLoading) {\n tileQueue.reprioritize(); // FIXME only call if view has changed\n tileQueue.loadMoreTiles(maxTotalLoading, maxNewLoads);\n }\n }\n\n if (frameState && this.renderer_ && !frameState.animate) {\n if (this.renderComplete_ === true) {\n if (this.hasListener(RenderEventType.RENDERCOMPLETE)) {\n this.renderer_.dispatchRenderEvent(\n RenderEventType.RENDERCOMPLETE,\n frameState\n );\n }\n if (this.loaded_ === false) {\n this.loaded_ = true;\n this.dispatchEvent(\n new MapEvent(MapEventType.LOADEND, this, frameState)\n );\n }\n } else if (this.loaded_ === true) {\n this.loaded_ = false;\n this.dispatchEvent(\n new MapEvent(MapEventType.LOADSTART, this, frameState)\n );\n }\n }\n\n const postRenderFunctions = this.postRenderFunctions_;\n for (let i = 0, ii = postRenderFunctions.length; i < ii; ++i) {\n postRenderFunctions[i](this, frameState);\n }\n postRenderFunctions.length = 0;\n }\n\n /**\n * @private\n */\n handleSizeChanged_() {\n if (this.getView() && !this.getView().getAnimating()) {\n this.getView().resolveConstraints(0);\n }\n\n this.render();\n }\n\n /**\n * @private\n */\n handleTargetChanged_() {\n if (this.mapBrowserEventHandler_) {\n for (let i = 0, ii = this.targetChangeHandlerKeys_.length; i < ii; ++i) {\n unlistenByKey(this.targetChangeHandlerKeys_[i]);\n }\n this.targetChangeHandlerKeys_ = null;\n this.viewport_.removeEventListener(\n EventType.CONTEXTMENU,\n this.boundHandleBrowserEvent_\n );\n this.viewport_.removeEventListener(\n EventType.WHEEL,\n this.boundHandleBrowserEvent_\n );\n this.mapBrowserEventHandler_.dispose();\n this.mapBrowserEventHandler_ = null;\n removeNode(this.viewport_);\n }\n\n if (this.targetElement_) {\n this.resizeObserver_.unobserve(this.targetElement_);\n const rootNode = this.targetElement_.getRootNode();\n if (rootNode instanceof ShadowRoot) {\n this.resizeObserver_.unobserve(rootNode.host);\n }\n }\n\n // target may be undefined, null, a string or an Element.\n // If it's a string we convert it to an Element before proceeding.\n // If it's not now an Element we remove the viewport from the DOM.\n // If it's an Element we append the viewport element to it.\n\n const target = this.getTarget();\n const targetElement =\n typeof target === 'string' ? document.getElementById(target) : target;\n this.targetElement_ = targetElement;\n if (!targetElement) {\n if (this.renderer_) {\n clearTimeout(this.postRenderTimeoutHandle_);\n this.postRenderTimeoutHandle_ = undefined;\n this.postRenderFunctions_.length = 0;\n this.renderer_.dispose();\n this.renderer_ = null;\n }\n if (this.animationDelayKey_) {\n cancelAnimationFrame(this.animationDelayKey_);\n this.animationDelayKey_ = undefined;\n }\n } else {\n targetElement.appendChild(this.viewport_);\n if (!this.renderer_) {\n this.renderer_ = new CompositeMapRenderer(this);\n }\n\n this.mapBrowserEventHandler_ = new MapBrowserEventHandler(\n this,\n this.moveTolerance_\n );\n for (const key in MapBrowserEventType) {\n this.mapBrowserEventHandler_.addEventListener(\n MapBrowserEventType[key],\n this.handleMapBrowserEvent.bind(this)\n );\n }\n this.viewport_.addEventListener(\n EventType.CONTEXTMENU,\n this.boundHandleBrowserEvent_,\n false\n );\n this.viewport_.addEventListener(\n EventType.WHEEL,\n this.boundHandleBrowserEvent_,\n PASSIVE_EVENT_LISTENERS ? {passive: false} : false\n );\n\n const keyboardEventTarget = !this.keyboardEventTarget_\n ? targetElement\n : this.keyboardEventTarget_;\n this.targetChangeHandlerKeys_ = [\n listen(\n keyboardEventTarget,\n EventType.KEYDOWN,\n this.handleBrowserEvent,\n this\n ),\n listen(\n keyboardEventTarget,\n EventType.KEYPRESS,\n this.handleBrowserEvent,\n this\n ),\n ];\n const rootNode = targetElement.getRootNode();\n if (rootNode instanceof ShadowRoot) {\n this.resizeObserver_.observe(rootNode.host);\n }\n this.resizeObserver_.observe(targetElement);\n }\n\n this.updateSize();\n // updateSize calls setSize, so no need to call this.render\n // ourselves here.\n }\n\n /**\n * @private\n */\n handleTileChange_() {\n this.render();\n }\n\n /**\n * @private\n */\n handleViewPropertyChanged_() {\n this.render();\n }\n\n /**\n * @private\n */\n handleViewChanged_() {\n if (this.viewPropertyListenerKey_) {\n unlistenByKey(this.viewPropertyListenerKey_);\n this.viewPropertyListenerKey_ = null;\n }\n if (this.viewChangeListenerKey_) {\n unlistenByKey(this.viewChangeListenerKey_);\n this.viewChangeListenerKey_ = null;\n }\n const view = this.getView();\n if (view) {\n this.updateViewportSize_();\n\n this.viewPropertyListenerKey_ = listen(\n view,\n ObjectEventType.PROPERTYCHANGE,\n this.handleViewPropertyChanged_,\n this\n );\n this.viewChangeListenerKey_ = listen(\n view,\n EventType.CHANGE,\n this.handleViewPropertyChanged_,\n this\n );\n\n view.resolveConstraints(0);\n }\n this.render();\n }\n\n /**\n * @private\n */\n handleLayerGroupChanged_() {\n if (this.layerGroupPropertyListenerKeys_) {\n this.layerGroupPropertyListenerKeys_.forEach(unlistenByKey);\n this.layerGroupPropertyListenerKeys_ = null;\n }\n const layerGroup = this.getLayerGroup();\n if (layerGroup) {\n this.handleLayerAdd_(new GroupEvent('addlayer', layerGroup));\n this.layerGroupPropertyListenerKeys_ = [\n listen(layerGroup, ObjectEventType.PROPERTYCHANGE, this.render, this),\n listen(layerGroup, EventType.CHANGE, this.render, this),\n listen(layerGroup, 'addlayer', this.handleLayerAdd_, this),\n listen(layerGroup, 'removelayer', this.handleLayerRemove_, this),\n ];\n }\n this.render();\n }\n\n /**\n * @return {boolean} Is rendered.\n */\n isRendered() {\n return !!this.frameState_;\n }\n\n /**\n * @private\n */\n animationDelay_() {\n this.animationDelayKey_ = undefined;\n this.renderFrame_(Date.now());\n }\n\n /**\n * Requests an immediate render in a synchronous manner.\n * @api\n */\n renderSync() {\n if (this.animationDelayKey_) {\n cancelAnimationFrame(this.animationDelayKey_);\n }\n this.animationDelay_();\n }\n\n /**\n * Redraws all text after new fonts have loaded\n */\n redrawText() {\n const layerStates = this.getLayerGroup().getLayerStatesArray();\n for (let i = 0, ii = layerStates.length; i < ii; ++i) {\n const layer = layerStates[i].layer;\n if (layer.hasRenderer()) {\n layer.getRenderer().handleFontsChanged();\n }\n }\n }\n\n /**\n * Request a map rendering (at the next animation frame).\n * @api\n */\n render() {\n if (this.renderer_ && this.animationDelayKey_ === undefined) {\n this.animationDelayKey_ = requestAnimationFrame(this.animationDelay_);\n }\n }\n\n /**\n * Remove the given control from the map.\n * @param {import(\"./control/Control.js\").default} control Control.\n * @return {import(\"./control/Control.js\").default|undefined} The removed control (or undefined\n * if the control was not found).\n * @api\n */\n removeControl(control) {\n return this.getControls().remove(control);\n }\n\n /**\n * Remove the given interaction from the map.\n * @param {import(\"./interaction/Interaction.js\").default} interaction Interaction to remove.\n * @return {import(\"./interaction/Interaction.js\").default|undefined} The removed interaction (or\n * undefined if the interaction was not found).\n * @api\n */\n removeInteraction(interaction) {\n return this.getInteractions().remove(interaction);\n }\n\n /**\n * Removes the given layer from the map.\n * @param {import(\"./layer/Base.js\").default} layer Layer.\n * @return {import(\"./layer/Base.js\").default|undefined} The removed layer (or undefined if the\n * layer was not found).\n * @api\n */\n removeLayer(layer) {\n const layers = this.getLayerGroup().getLayers();\n return layers.remove(layer);\n }\n\n /**\n * @param {import(\"./layer/Group.js\").GroupEvent} event The layer remove event.\n * @private\n */\n handleLayerRemove_(event) {\n removeLayerMapProperty(event.layer);\n }\n\n /**\n * Remove the given overlay from the map.\n * @param {import(\"./Overlay.js\").default} overlay Overlay.\n * @return {import(\"./Overlay.js\").default|undefined} The removed overlay (or undefined\n * if the overlay was not found).\n * @api\n */\n removeOverlay(overlay) {\n return this.getOverlays().remove(overlay);\n }\n\n /**\n * @param {number} time Time.\n * @private\n */\n renderFrame_(time) {\n const size = this.getSize();\n const view = this.getView();\n const previousFrameState = this.frameState_;\n /** @type {?FrameState} */\n let frameState = null;\n if (size !== undefined && hasArea(size) && view && view.isDef()) {\n const viewHints = view.getHints(\n this.frameState_ ? this.frameState_.viewHints : undefined\n );\n const viewState = view.getState();\n frameState = {\n animate: false,\n coordinateToPixelTransform: this.coordinateToPixelTransform_,\n declutterTree: null,\n extent: getForViewAndSize(\n viewState.center,\n viewState.resolution,\n viewState.rotation,\n size\n ),\n index: this.frameIndex_++,\n layerIndex: 0,\n layerStatesArray: this.getLayerGroup().getLayerStatesArray(),\n pixelRatio: this.pixelRatio_,\n pixelToCoordinateTransform: this.pixelToCoordinateTransform_,\n postRenderFunctions: [],\n size: size,\n tileQueue: this.tileQueue_,\n time: time,\n usedTiles: {},\n viewState: viewState,\n viewHints: viewHints,\n wantedTiles: {},\n mapId: getUid(this),\n renderTargets: {},\n };\n if (viewState.nextCenter && viewState.nextResolution) {\n const rotation = isNaN(viewState.nextRotation)\n ? viewState.rotation\n : viewState.nextRotation;\n\n frameState.nextExtent = getForViewAndSize(\n viewState.nextCenter,\n viewState.nextResolution,\n rotation,\n size\n );\n }\n }\n\n this.frameState_ = frameState;\n this.renderer_.renderFrame(frameState);\n\n if (frameState) {\n if (frameState.animate) {\n this.render();\n }\n Array.prototype.push.apply(\n this.postRenderFunctions_,\n frameState.postRenderFunctions\n );\n\n if (previousFrameState) {\n const moveStart =\n !this.previousExtent_ ||\n (!isEmpty(this.previousExtent_) &&\n !equalsExtent(frameState.extent, this.previousExtent_));\n if (moveStart) {\n this.dispatchEvent(\n new MapEvent(MapEventType.MOVESTART, this, previousFrameState)\n );\n this.previousExtent_ = createOrUpdateEmpty(this.previousExtent_);\n }\n }\n\n const idle =\n this.previousExtent_ &&\n !frameState.viewHints[ViewHint.ANIMATING] &&\n !frameState.viewHints[ViewHint.INTERACTING] &&\n !equalsExtent(frameState.extent, this.previousExtent_);\n\n if (idle) {\n this.dispatchEvent(\n new MapEvent(MapEventType.MOVEEND, this, frameState)\n );\n clone(frameState.extent, this.previousExtent_);\n }\n }\n\n this.dispatchEvent(new MapEvent(MapEventType.POSTRENDER, this, frameState));\n\n this.renderComplete_ =\n this.hasListener(MapEventType.LOADSTART) ||\n this.hasListener(MapEventType.LOADEND) ||\n this.hasListener(RenderEventType.RENDERCOMPLETE)\n ? !this.tileQueue_.getTilesLoading() &&\n !this.tileQueue_.getCount() &&\n !this.getLoadingOrNotReady()\n : undefined;\n\n if (!this.postRenderTimeoutHandle_) {\n this.postRenderTimeoutHandle_ = setTimeout(() => {\n this.postRenderTimeoutHandle_ = undefined;\n this.handlePostRender();\n }, 0);\n }\n }\n\n /**\n * Sets the layergroup of this map.\n * @param {LayerGroup} layerGroup A layer group containing the layers in this map.\n * @observable\n * @api\n */\n setLayerGroup(layerGroup) {\n const oldLayerGroup = this.getLayerGroup();\n if (oldLayerGroup) {\n this.handleLayerRemove_(new GroupEvent('removelayer', oldLayerGroup));\n }\n this.set(MapProperty.LAYERGROUP, layerGroup);\n }\n\n /**\n * Set the size of this map.\n * @param {import(\"./size.js\").Size|undefined} size The size in pixels of the map in the DOM.\n * @observable\n * @api\n */\n setSize(size) {\n this.set(MapProperty.SIZE, size);\n }\n\n /**\n * Set the target element to render this map into.\n * @param {HTMLElement|string} [target] The Element or id of the Element\n * that the map is rendered in.\n * @observable\n * @api\n */\n setTarget(target) {\n this.set(MapProperty.TARGET, target);\n }\n\n /**\n * Set the view for this map.\n * @param {View|Promise} view The view that controls this map.\n * It is also possible to pass a promise that resolves to options for constructing a view. This\n * alternative allows view properties to be resolved by sources or other components that load\n * view-related metadata.\n * @observable\n * @api\n */\n setView(view) {\n if (!view || view instanceof View) {\n this.set(MapProperty.VIEW, view);\n return;\n }\n this.set(MapProperty.VIEW, new View());\n\n const map = this;\n view.then(function (viewOptions) {\n map.setView(new View(viewOptions));\n });\n }\n\n /**\n * Force a recalculation of the map viewport size. This should be called when\n * third-party code changes the size of the map viewport.\n * @api\n */\n updateSize() {\n const targetElement = this.getTargetElement();\n\n let size = undefined;\n if (targetElement) {\n const computedStyle = getComputedStyle(targetElement);\n const width =\n targetElement.offsetWidth -\n parseFloat(computedStyle['borderLeftWidth']) -\n parseFloat(computedStyle['paddingLeft']) -\n parseFloat(computedStyle['paddingRight']) -\n parseFloat(computedStyle['borderRightWidth']);\n const height =\n targetElement.offsetHeight -\n parseFloat(computedStyle['borderTopWidth']) -\n parseFloat(computedStyle['paddingTop']) -\n parseFloat(computedStyle['paddingBottom']) -\n parseFloat(computedStyle['borderBottomWidth']);\n if (!isNaN(width) && !isNaN(height)) {\n size = [width, height];\n if (\n !hasArea(size) &&\n !!(\n targetElement.offsetWidth ||\n targetElement.offsetHeight ||\n targetElement.getClientRects().length\n )\n ) {\n warn(\n \"No map visible because the map container's width or height are 0.\"\n );\n }\n }\n }\n\n const oldSize = this.getSize();\n if (size && (!oldSize || !equals(size, oldSize))) {\n this.setSize(size);\n this.updateViewportSize_();\n }\n }\n\n /**\n * Recomputes the viewport size and save it on the view object (if any)\n * @private\n */\n updateViewportSize_() {\n const view = this.getView();\n if (view) {\n let size = undefined;\n const computedStyle = getComputedStyle(this.viewport_);\n if (computedStyle.width && computedStyle.height) {\n size = [\n parseInt(computedStyle.width, 10),\n parseInt(computedStyle.height, 10),\n ];\n }\n view.setViewportSize(size);\n }\n }\n}\n\n/**\n * @param {MapOptions} options Map options.\n * @return {MapOptionsInternal} Internal map options.\n */\nfunction createOptionsInternal(options) {\n /**\n * @type {HTMLElement|Document}\n */\n let keyboardEventTarget = null;\n if (options.keyboardEventTarget !== undefined) {\n keyboardEventTarget =\n typeof options.keyboardEventTarget === 'string'\n ? document.getElementById(options.keyboardEventTarget)\n : options.keyboardEventTarget;\n }\n\n /**\n * @type {Object}\n */\n const values = {};\n\n const layerGroup =\n options.layers &&\n typeof (/** @type {?} */ (options.layers).getLayers) === 'function'\n ? /** @type {LayerGroup} */ (options.layers)\n : new LayerGroup({\n layers:\n /** @type {Collection|Array} */ (\n options.layers\n ),\n });\n values[MapProperty.LAYERGROUP] = layerGroup;\n\n values[MapProperty.TARGET] = options.target;\n\n values[MapProperty.VIEW] =\n options.view instanceof View ? options.view : new View();\n\n /** @type {Collection} */\n let controls;\n if (options.controls !== undefined) {\n if (Array.isArray(options.controls)) {\n controls = new Collection(options.controls.slice());\n } else {\n assert(\n typeof (/** @type {?} */ (options.controls).getArray) === 'function',\n 47\n ); // Expected `controls` to be an array or an `import(\"./Collection.js\").Collection`\n controls = options.controls;\n }\n }\n\n /** @type {Collection} */\n let interactions;\n if (options.interactions !== undefined) {\n if (Array.isArray(options.interactions)) {\n interactions = new Collection(options.interactions.slice());\n } else {\n assert(\n typeof (/** @type {?} */ (options.interactions).getArray) ===\n 'function',\n 48\n ); // Expected `interactions` to be an array or an `import(\"./Collection.js\").Collection`\n interactions = options.interactions;\n }\n }\n\n /** @type {Collection} */\n let overlays;\n if (options.overlays !== undefined) {\n if (Array.isArray(options.overlays)) {\n overlays = new Collection(options.overlays.slice());\n } else {\n assert(\n typeof (/** @type {?} */ (options.overlays).getArray) === 'function',\n 49\n ); // Expected `overlays` to be an array or an `import(\"./Collection.js\").Collection`\n overlays = options.overlays;\n }\n } else {\n overlays = new Collection();\n }\n\n return {\n controls: controls,\n interactions: interactions,\n keyboardEventTarget: keyboardEventTarget,\n overlays: overlays,\n values: values,\n };\n}\nexport default Map;\n","/**\n * @module ol/Overlay\n */\nimport BaseObject from './Object.js';\nimport MapEventType from './MapEventType.js';\nimport {CLASS_SELECTABLE} from './css.js';\nimport {containsExtent} from './extent.js';\nimport {listen, unlistenByKey} from './events.js';\nimport {outerHeight, outerWidth, removeChildren, removeNode} from './dom.js';\n\n/**\n * @typedef {'bottom-left' | 'bottom-center' | 'bottom-right' | 'center-left' | 'center-center' | 'center-right' | 'top-left' | 'top-center' | 'top-right'} Positioning\n * The overlay position: `'bottom-left'`, `'bottom-center'`, `'bottom-right'`,\n * `'center-left'`, `'center-center'`, `'center-right'`, `'top-left'`,\n * `'top-center'`, or `'top-right'`.\n */\n\n/**\n * @typedef {Object} Options\n * @property {number|string} [id] Set the overlay id. The overlay id can be used\n * with the {@link module:ol/Map~Map#getOverlayById} method.\n * @property {HTMLElement} [element] The overlay element.\n * @property {Array} [offset=[0, 0]] Offsets in pixels used when positioning\n * the overlay. The first element in the\n * array is the horizontal offset. A positive value shifts the overlay right.\n * The second element in the array is the vertical offset. A positive value\n * shifts the overlay down.\n * @property {import(\"./coordinate.js\").Coordinate} [position] The overlay position\n * in map projection.\n * @property {Positioning} [positioning='top-left'] Defines how\n * the overlay is actually positioned with respect to its `position` property.\n * Possible values are `'bottom-left'`, `'bottom-center'`, `'bottom-right'`,\n * `'center-left'`, `'center-center'`, `'center-right'`, `'top-left'`,\n * `'top-center'`, and `'top-right'`.\n * @property {boolean} [stopEvent=true] Whether event propagation to the map\n * viewport should be stopped. If `true` the overlay is placed in the same\n * container as that of the controls (CSS class name\n * `ol-overlaycontainer-stopevent`); if `false` it is placed in the container\n * with CSS class name specified by the `className` property.\n * @property {boolean} [insertFirst=true] Whether the overlay is inserted first\n * in the overlay container, or appended. If the overlay is placed in the same\n * container as that of the controls (see the `stopEvent` option) you will\n * probably set `insertFirst` to `true` so the overlay is displayed below the\n * controls.\n * @property {PanIntoViewOptions|boolean} [autoPan=false] Pan the map when calling\n * `setPosition`, so that the overlay is entirely visible in the current viewport.\n * @property {string} [className='ol-overlay-container ol-selectable'] CSS class\n * name.\n */\n\n/**\n * @typedef {Object} PanOptions\n * @property {number} [duration=1000] The duration of the animation in\n * milliseconds.\n * @property {function(number):number} [easing] The easing function to use. Can\n * be one from {@link module:ol/easing} or a custom function.\n * Default is {@link module:ol/easing.inAndOut}.\n */\n\n/**\n * @typedef {Object} PanIntoViewOptions\n * @property {PanOptions} [animation={}] The animation parameters for the pan\n * @property {number} [margin=20] The margin (in pixels) between the\n * overlay and the borders of the map when panning into view.\n */\n\n/**\n * @enum {string}\n * @protected\n */\nconst Property = {\n ELEMENT: 'element',\n MAP: 'map',\n OFFSET: 'offset',\n POSITION: 'position',\n POSITIONING: 'positioning',\n};\n\n/**\n * @typedef {import(\"./ObjectEventType\").Types|'change:element'|'change:map'|'change:offset'|'change:position'|\n * 'change:positioning'} OverlayObjectEventTypes\n */\n\n/***\n * @template Return\n * @typedef {import(\"./Observable\").OnSignature &\n * import(\"./Observable\").OnSignature &\n * import(\"./Observable\").CombinedOnSignature} OverlayOnSignature\n */\n\n/**\n * @classdesc\n * An element to be displayed over the map and attached to a single map\n * location. Like {@link module:ol/control/Control~Control}, Overlays are\n * visible widgets. Unlike Controls, they are not in a fixed position on the\n * screen, but are tied to a geographical coordinate, so panning the map will\n * move an Overlay but not a Control.\n *\n * Example:\n *\n * import Overlay from 'ol/Overlay.js';\n *\n * // ...\n * const popup = new Overlay({\n * element: document.getElementById('popup'),\n * });\n * popup.setPosition(coordinate);\n * map.addOverlay(popup);\n *\n * @api\n */\nclass Overlay extends BaseObject {\n /**\n * @param {Options} options Overlay options.\n */\n constructor(options) {\n super();\n\n /***\n * @type {OverlayOnSignature}\n */\n this.on;\n\n /***\n * @type {OverlayOnSignature}\n */\n this.once;\n\n /***\n * @type {OverlayOnSignature}\n */\n this.un;\n\n /**\n * @protected\n * @type {Options}\n */\n this.options = options;\n\n /**\n * @protected\n * @type {number|string|undefined}\n */\n this.id = options.id;\n\n /**\n * @protected\n * @type {boolean}\n */\n this.insertFirst =\n options.insertFirst !== undefined ? options.insertFirst : true;\n\n /**\n * @protected\n * @type {boolean}\n */\n this.stopEvent = options.stopEvent !== undefined ? options.stopEvent : true;\n\n /**\n * @protected\n * @type {HTMLElement}\n */\n this.element = document.createElement('div');\n this.element.className =\n options.className !== undefined\n ? options.className\n : 'ol-overlay-container ' + CLASS_SELECTABLE;\n this.element.style.position = 'absolute';\n this.element.style.pointerEvents = 'auto';\n\n /**\n * @protected\n * @type {PanIntoViewOptions|undefined}\n */\n this.autoPan = options.autoPan === true ? {} : options.autoPan || undefined;\n\n /**\n * @protected\n * @type {{transform_: string,\n * visible: boolean}}\n */\n this.rendered = {\n transform_: '',\n visible: true,\n };\n\n /**\n * @protected\n * @type {?import(\"./events.js\").EventsKey}\n */\n this.mapPostrenderListenerKey = null;\n\n this.addChangeListener(Property.ELEMENT, this.handleElementChanged);\n this.addChangeListener(Property.MAP, this.handleMapChanged);\n this.addChangeListener(Property.OFFSET, this.handleOffsetChanged);\n this.addChangeListener(Property.POSITION, this.handlePositionChanged);\n this.addChangeListener(Property.POSITIONING, this.handlePositioningChanged);\n\n if (options.element !== undefined) {\n this.setElement(options.element);\n }\n\n this.setOffset(options.offset !== undefined ? options.offset : [0, 0]);\n\n this.setPositioning(options.positioning || 'top-left');\n\n if (options.position !== undefined) {\n this.setPosition(options.position);\n }\n }\n\n /**\n * Get the DOM element of this overlay.\n * @return {HTMLElement|undefined} The Element containing the overlay.\n * @observable\n * @api\n */\n getElement() {\n return /** @type {HTMLElement|undefined} */ (this.get(Property.ELEMENT));\n }\n\n /**\n * Get the overlay identifier which is set on constructor.\n * @return {number|string|undefined} Id.\n * @api\n */\n getId() {\n return this.id;\n }\n\n /**\n * Get the map associated with this overlay.\n * @return {import(\"./Map.js\").default|null} The map that the\n * overlay is part of.\n * @observable\n * @api\n */\n getMap() {\n return /** @type {import(\"./Map.js\").default|null} */ (\n this.get(Property.MAP) || null\n );\n }\n\n /**\n * Get the offset of this overlay.\n * @return {Array} The offset.\n * @observable\n * @api\n */\n getOffset() {\n return /** @type {Array} */ (this.get(Property.OFFSET));\n }\n\n /**\n * Get the current position of this overlay.\n * @return {import(\"./coordinate.js\").Coordinate|undefined} The spatial point that the overlay is\n * anchored at.\n * @observable\n * @api\n */\n getPosition() {\n return /** @type {import(\"./coordinate.js\").Coordinate|undefined} */ (\n this.get(Property.POSITION)\n );\n }\n\n /**\n * Get the current positioning of this overlay.\n * @return {Positioning} How the overlay is positioned\n * relative to its point on the map.\n * @observable\n * @api\n */\n getPositioning() {\n return /** @type {Positioning} */ (this.get(Property.POSITIONING));\n }\n\n /**\n * @protected\n */\n handleElementChanged() {\n removeChildren(this.element);\n const element = this.getElement();\n if (element) {\n this.element.appendChild(element);\n }\n }\n\n /**\n * @protected\n */\n handleMapChanged() {\n if (this.mapPostrenderListenerKey) {\n removeNode(this.element);\n unlistenByKey(this.mapPostrenderListenerKey);\n this.mapPostrenderListenerKey = null;\n }\n const map = this.getMap();\n if (map) {\n this.mapPostrenderListenerKey = listen(\n map,\n MapEventType.POSTRENDER,\n this.render,\n this\n );\n this.updatePixelPosition();\n const container = this.stopEvent\n ? map.getOverlayContainerStopEvent()\n : map.getOverlayContainer();\n if (this.insertFirst) {\n container.insertBefore(this.element, container.childNodes[0] || null);\n } else {\n container.appendChild(this.element);\n }\n this.performAutoPan();\n }\n }\n\n /**\n * @protected\n */\n render() {\n this.updatePixelPosition();\n }\n\n /**\n * @protected\n */\n handleOffsetChanged() {\n this.updatePixelPosition();\n }\n\n /**\n * @protected\n */\n handlePositionChanged() {\n this.updatePixelPosition();\n this.performAutoPan();\n }\n\n /**\n * @protected\n */\n handlePositioningChanged() {\n this.updatePixelPosition();\n }\n\n /**\n * Set the DOM element to be associated with this overlay.\n * @param {HTMLElement|undefined} element The Element containing the overlay.\n * @observable\n * @api\n */\n setElement(element) {\n this.set(Property.ELEMENT, element);\n }\n\n /**\n * Set the map to be associated with this overlay.\n * @param {import(\"./Map.js\").default|null} map The map that the\n * overlay is part of. Pass `null` to just remove the overlay from the current map.\n * @observable\n * @api\n */\n setMap(map) {\n this.set(Property.MAP, map);\n }\n\n /**\n * Set the offset for this overlay.\n * @param {Array} offset Offset.\n * @observable\n * @api\n */\n setOffset(offset) {\n this.set(Property.OFFSET, offset);\n }\n\n /**\n * Set the position for this overlay. If the position is `undefined` the\n * overlay is hidden.\n * @param {import(\"./coordinate.js\").Coordinate|undefined} position The spatial point that the overlay\n * is anchored at.\n * @observable\n * @api\n */\n setPosition(position) {\n this.set(Property.POSITION, position);\n }\n\n /**\n * Pan the map so that the overlay is entirely visible in the current viewport\n * (if necessary) using the configured autoPan parameters\n * @protected\n */\n performAutoPan() {\n if (this.autoPan) {\n this.panIntoView(this.autoPan);\n }\n }\n\n /**\n * Pan the map so that the overlay is entirely visible in the current viewport\n * (if necessary).\n * @param {PanIntoViewOptions} [panIntoViewOptions] Options for the pan action\n * @api\n */\n panIntoView(panIntoViewOptions) {\n const map = this.getMap();\n\n if (!map || !map.getTargetElement() || !this.get(Property.POSITION)) {\n return;\n }\n\n const mapRect = this.getRect(map.getTargetElement(), map.getSize());\n const element = this.getElement();\n const overlayRect = this.getRect(element, [\n outerWidth(element),\n outerHeight(element),\n ]);\n\n panIntoViewOptions = panIntoViewOptions || {};\n\n const myMargin =\n panIntoViewOptions.margin === undefined ? 20 : panIntoViewOptions.margin;\n if (!containsExtent(mapRect, overlayRect)) {\n // the overlay is not completely inside the viewport, so pan the map\n const offsetLeft = overlayRect[0] - mapRect[0];\n const offsetRight = mapRect[2] - overlayRect[2];\n const offsetTop = overlayRect[1] - mapRect[1];\n const offsetBottom = mapRect[3] - overlayRect[3];\n\n const delta = [0, 0];\n if (offsetLeft < 0) {\n // move map to the left\n delta[0] = offsetLeft - myMargin;\n } else if (offsetRight < 0) {\n // move map to the right\n delta[0] = Math.abs(offsetRight) + myMargin;\n }\n if (offsetTop < 0) {\n // move map up\n delta[1] = offsetTop - myMargin;\n } else if (offsetBottom < 0) {\n // move map down\n delta[1] = Math.abs(offsetBottom) + myMargin;\n }\n\n if (delta[0] !== 0 || delta[1] !== 0) {\n const center = /** @type {import(\"./coordinate.js\").Coordinate} */ (\n map.getView().getCenterInternal()\n );\n const centerPx = map.getPixelFromCoordinateInternal(center);\n if (!centerPx) {\n return;\n }\n const newCenterPx = [centerPx[0] + delta[0], centerPx[1] + delta[1]];\n\n const panOptions = panIntoViewOptions.animation || {};\n map.getView().animateInternal({\n center: map.getCoordinateFromPixelInternal(newCenterPx),\n duration: panOptions.duration,\n easing: panOptions.easing,\n });\n }\n }\n }\n\n /**\n * Get the extent of an element relative to the document\n * @param {HTMLElement} element The element.\n * @param {import(\"./size.js\").Size} size The size of the element.\n * @return {import(\"./extent.js\").Extent} The extent.\n * @protected\n */\n getRect(element, size) {\n const box = element.getBoundingClientRect();\n const offsetX = box.left + window.pageXOffset;\n const offsetY = box.top + window.pageYOffset;\n return [offsetX, offsetY, offsetX + size[0], offsetY + size[1]];\n }\n\n /**\n * Set the positioning for this overlay.\n * @param {Positioning} positioning how the overlay is\n * positioned relative to its point on the map.\n * @observable\n * @api\n */\n setPositioning(positioning) {\n this.set(Property.POSITIONING, positioning);\n }\n\n /**\n * Modify the visibility of the element.\n * @param {boolean} visible Element visibility.\n * @protected\n */\n setVisible(visible) {\n if (this.rendered.visible !== visible) {\n this.element.style.display = visible ? '' : 'none';\n this.rendered.visible = visible;\n }\n }\n\n /**\n * Update pixel position.\n * @protected\n */\n updatePixelPosition() {\n const map = this.getMap();\n const position = this.getPosition();\n if (!map || !map.isRendered() || !position) {\n this.setVisible(false);\n return;\n }\n\n const pixel = map.getPixelFromCoordinate(position);\n const mapSize = map.getSize();\n this.updateRenderedPosition(pixel, mapSize);\n }\n\n /**\n * @param {import(\"./pixel.js\").Pixel} pixel The pixel location.\n * @param {import(\"./size.js\").Size|undefined} mapSize The map size.\n * @protected\n */\n updateRenderedPosition(pixel, mapSize) {\n const style = this.element.style;\n const offset = this.getOffset();\n\n const positioning = this.getPositioning();\n\n this.setVisible(true);\n\n const x = Math.round(pixel[0] + offset[0]) + 'px';\n const y = Math.round(pixel[1] + offset[1]) + 'px';\n let posX = '0%';\n let posY = '0%';\n if (\n positioning == 'bottom-right' ||\n positioning == 'center-right' ||\n positioning == 'top-right'\n ) {\n posX = '-100%';\n } else if (\n positioning == 'bottom-center' ||\n positioning == 'center-center' ||\n positioning == 'top-center'\n ) {\n posX = '-50%';\n }\n if (\n positioning == 'bottom-left' ||\n positioning == 'bottom-center' ||\n positioning == 'bottom-right'\n ) {\n posY = '-100%';\n } else if (\n positioning == 'center-left' ||\n positioning == 'center-center' ||\n positioning == 'center-right'\n ) {\n posY = '-50%';\n }\n const transform = `translate(${posX}, ${posY}) translate(${x}, ${y})`;\n if (this.rendered.transform_ != transform) {\n this.rendered.transform_ = transform;\n style.transform = transform;\n }\n }\n\n /**\n * returns the options this Overlay has been created with\n * @return {Options} overlay options\n */\n getOptions() {\n return this.options;\n }\n}\n\nexport default Overlay;\n","/**\n * @module ol/structs/LRUCache\n */\n\nimport {assert} from '../asserts.js';\n\n/**\n * @typedef {Object} Entry\n * @property {string} key_ Key.\n * @property {Object} newer Newer.\n * @property {Object} older Older.\n * @property {*} value_ Value.\n */\n\n/**\n * @classdesc\n * Implements a Least-Recently-Used cache where the keys do not conflict with\n * Object's properties (e.g. 'hasOwnProperty' is not allowed as a key). Expiring\n * items from the cache is the responsibility of the user.\n *\n * @fires import(\"../events/Event.js\").default\n * @template T\n */\nclass LRUCache {\n /**\n * @param {number} [highWaterMark] High water mark.\n */\n constructor(highWaterMark) {\n /**\n * Desired max cache size after expireCache(). If set to 0, no cache entries\n * will be pruned at all.\n * @type {number}\n */\n this.highWaterMark = highWaterMark !== undefined ? highWaterMark : 2048;\n\n /**\n * @private\n * @type {number}\n */\n this.count_ = 0;\n\n /**\n * @private\n * @type {!Object}\n */\n this.entries_ = {};\n\n /**\n * @private\n * @type {?Entry}\n */\n this.oldest_ = null;\n\n /**\n * @private\n * @type {?Entry}\n */\n this.newest_ = null;\n }\n\n /**\n * @return {boolean} Can expire cache.\n */\n canExpireCache() {\n return this.highWaterMark > 0 && this.getCount() > this.highWaterMark;\n }\n\n /**\n * Expire the cache.\n * @param {!Object} [keep] Keys to keep. To be implemented by subclasses.\n */\n expireCache(keep) {\n while (this.canExpireCache()) {\n this.pop();\n }\n }\n\n /**\n * FIXME empty description for jsdoc\n */\n clear() {\n this.count_ = 0;\n this.entries_ = {};\n this.oldest_ = null;\n this.newest_ = null;\n }\n\n /**\n * @param {string} key Key.\n * @return {boolean} Contains key.\n */\n containsKey(key) {\n return this.entries_.hasOwnProperty(key);\n }\n\n /**\n * @param {function(T, string, LRUCache): ?} f The function\n * to call for every entry from the oldest to the newer. This function takes\n * 3 arguments (the entry value, the entry key and the LRUCache object).\n * The return value is ignored.\n */\n forEach(f) {\n let entry = this.oldest_;\n while (entry) {\n f(entry.value_, entry.key_, this);\n entry = entry.newer;\n }\n }\n\n /**\n * @param {string} key Key.\n * @param {*} [options] Options (reserved for subclasses).\n * @return {T} Value.\n */\n get(key, options) {\n const entry = this.entries_[key];\n assert(entry !== undefined, 15); // Tried to get a value for a key that does not exist in the cache\n if (entry === this.newest_) {\n return entry.value_;\n } else if (entry === this.oldest_) {\n this.oldest_ = /** @type {Entry} */ (this.oldest_.newer);\n this.oldest_.older = null;\n } else {\n entry.newer.older = entry.older;\n entry.older.newer = entry.newer;\n }\n entry.newer = null;\n entry.older = this.newest_;\n this.newest_.newer = entry;\n this.newest_ = entry;\n return entry.value_;\n }\n\n /**\n * Remove an entry from the cache.\n * @param {string} key The entry key.\n * @return {T} The removed entry.\n */\n remove(key) {\n const entry = this.entries_[key];\n assert(entry !== undefined, 15); // Tried to get a value for a key that does not exist in the cache\n if (entry === this.newest_) {\n this.newest_ = /** @type {Entry} */ (entry.older);\n if (this.newest_) {\n this.newest_.newer = null;\n }\n } else if (entry === this.oldest_) {\n this.oldest_ = /** @type {Entry} */ (entry.newer);\n if (this.oldest_) {\n this.oldest_.older = null;\n }\n } else {\n entry.newer.older = entry.older;\n entry.older.newer = entry.newer;\n }\n delete this.entries_[key];\n --this.count_;\n return entry.value_;\n }\n\n /**\n * @return {number} Count.\n */\n getCount() {\n return this.count_;\n }\n\n /**\n * @return {Array} Keys.\n */\n getKeys() {\n const keys = new Array(this.count_);\n let i = 0;\n let entry;\n for (entry = this.newest_; entry; entry = entry.older) {\n keys[i++] = entry.key_;\n }\n return keys;\n }\n\n /**\n * @return {Array} Values.\n */\n getValues() {\n const values = new Array(this.count_);\n let i = 0;\n let entry;\n for (entry = this.newest_; entry; entry = entry.older) {\n values[i++] = entry.value_;\n }\n return values;\n }\n\n /**\n * @return {T} Last value.\n */\n peekLast() {\n return this.oldest_.value_;\n }\n\n /**\n * @return {string} Last key.\n */\n peekLastKey() {\n return this.oldest_.key_;\n }\n\n /**\n * Get the key of the newest item in the cache. Throws if the cache is empty.\n * @return {string} The newest key.\n */\n peekFirstKey() {\n return this.newest_.key_;\n }\n\n /**\n * Return an entry without updating least recently used time.\n * @param {string} key Key.\n * @return {T} Value.\n */\n peek(key) {\n if (!this.containsKey(key)) {\n return undefined;\n }\n return this.entries_[key].value_;\n }\n\n /**\n * @return {T} value Value.\n */\n pop() {\n const entry = this.oldest_;\n delete this.entries_[entry.key_];\n if (entry.newer) {\n entry.newer.older = null;\n }\n this.oldest_ = /** @type {Entry} */ (entry.newer);\n if (!this.oldest_) {\n this.newest_ = null;\n }\n --this.count_;\n return entry.value_;\n }\n\n /**\n * @param {string} key Key.\n * @param {T} value Value.\n */\n replace(key, value) {\n this.get(key); // update `newest_`\n this.entries_[key].value_ = value;\n }\n\n /**\n * @param {string} key Key.\n * @param {T} value Value.\n */\n set(key, value) {\n assert(!(key in this.entries_), 16); // Tried to set a value for a key that is used already\n const entry = {\n key_: key,\n newer: null,\n older: this.newest_,\n value_: value,\n };\n if (!this.newest_) {\n this.oldest_ = entry;\n } else {\n this.newest_.newer = entry;\n }\n this.newest_ = entry;\n this.entries_[key] = entry;\n ++this.count_;\n }\n\n /**\n * Set a maximum number of entries for the cache.\n * @param {number} size Cache size.\n * @api\n */\n setSize(size) {\n this.highWaterMark = size;\n }\n}\n\nexport default LRUCache;\n","/**\n * @module ol/tilecoord\n */\n\n/**\n * An array of three numbers representing the location of a tile in a tile\n * grid. The order is `z` (zoom level), `x` (column), and `y` (row).\n * @typedef {Array} TileCoord\n * @api\n */\n\n/**\n * @param {number} z Z.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {TileCoord} [tileCoord] Tile coordinate.\n * @return {TileCoord} Tile coordinate.\n */\nexport function createOrUpdate(z, x, y, tileCoord) {\n if (tileCoord !== undefined) {\n tileCoord[0] = z;\n tileCoord[1] = x;\n tileCoord[2] = y;\n return tileCoord;\n }\n return [z, x, y];\n}\n\n/**\n * @param {number} z Z.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {string} Key.\n */\nexport function getKeyZXY(z, x, y) {\n return z + '/' + x + '/' + y;\n}\n\n/**\n * Get the key for a tile coord.\n * @param {TileCoord} tileCoord The tile coord.\n * @return {string} Key.\n */\nexport function getKey(tileCoord) {\n return getKeyZXY(tileCoord[0], tileCoord[1], tileCoord[2]);\n}\n\n/**\n * Get the tile cache key for a tile key obtained through `tile.getKey()`.\n * @param {string} tileKey The tile key.\n * @return {string} The cache key.\n */\nexport function getCacheKeyForTileKey(tileKey) {\n const [z, x, y] = tileKey\n .substring(tileKey.lastIndexOf('/') + 1, tileKey.length)\n .split(',')\n .map(Number);\n return getKeyZXY(z, x, y);\n}\n\n/**\n * Get a tile coord given a key.\n * @param {string} key The tile coord key.\n * @return {TileCoord} The tile coord.\n */\nexport function fromKey(key) {\n return key.split('/').map(Number);\n}\n\n/**\n * @param {TileCoord} tileCoord Tile coord.\n * @return {number} Hash.\n */\nexport function hash(tileCoord) {\n return (tileCoord[1] << tileCoord[0]) + tileCoord[2];\n}\n\n/**\n * @param {TileCoord} tileCoord Tile coordinate.\n * @param {!import(\"./tilegrid/TileGrid.js\").default} tileGrid Tile grid.\n * @return {boolean} Tile coordinate is within extent and zoom level range.\n */\nexport function withinExtentAndZ(tileCoord, tileGrid) {\n const z = tileCoord[0];\n const x = tileCoord[1];\n const y = tileCoord[2];\n\n if (tileGrid.getMinZoom() > z || z > tileGrid.getMaxZoom()) {\n return false;\n }\n const tileRange = tileGrid.getFullTileRange(z);\n if (!tileRange) {\n return true;\n }\n return tileRange.containsXY(x, y);\n}\n","/**\n * @module ol/TileCache\n */\nimport LRUCache from './structs/LRUCache.js';\nimport {fromKey, getKey} from './tilecoord.js';\n\nclass TileCache extends LRUCache {\n clear() {\n while (this.getCount() > 0) {\n this.pop().release();\n }\n super.clear();\n }\n\n /**\n * @param {!Object} usedTiles Used tiles.\n */\n expireCache(usedTiles) {\n while (this.canExpireCache()) {\n const tile = this.peekLast();\n if (tile.getKey() in usedTiles) {\n break;\n } else {\n this.pop().release();\n }\n }\n }\n\n /**\n * Prune all tiles from the cache that don't have the same z as the newest tile.\n */\n pruneExceptNewestZ() {\n if (this.getCount() === 0) {\n return;\n }\n const key = this.peekFirstKey();\n const tileCoord = fromKey(key);\n const z = tileCoord[0];\n this.forEach((tile) => {\n if (tile.tileCoord[0] !== z) {\n this.remove(getKey(tile.tileCoord));\n tile.release();\n }\n });\n }\n}\n\nexport default TileCache;\n","/**\n * @module ol/TileRange\n */\n\n/**\n * A representation of a contiguous block of tiles. A tile range is specified\n * by its min/max tile coordinates and is inclusive of coordinates.\n */\nclass TileRange {\n /**\n * @param {number} minX Minimum X.\n * @param {number} maxX Maximum X.\n * @param {number} minY Minimum Y.\n * @param {number} maxY Maximum Y.\n */\n constructor(minX, maxX, minY, maxY) {\n /**\n * @type {number}\n */\n this.minX = minX;\n\n /**\n * @type {number}\n */\n this.maxX = maxX;\n\n /**\n * @type {number}\n */\n this.minY = minY;\n\n /**\n * @type {number}\n */\n this.maxY = maxY;\n }\n\n /**\n * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @return {boolean} Contains tile coordinate.\n */\n contains(tileCoord) {\n return this.containsXY(tileCoord[1], tileCoord[2]);\n }\n\n /**\n * @param {TileRange} tileRange Tile range.\n * @return {boolean} Contains.\n */\n containsTileRange(tileRange) {\n return (\n this.minX <= tileRange.minX &&\n tileRange.maxX <= this.maxX &&\n this.minY <= tileRange.minY &&\n tileRange.maxY <= this.maxY\n );\n }\n\n /**\n * @param {number} x Tile coordinate x.\n * @param {number} y Tile coordinate y.\n * @return {boolean} Contains coordinate.\n */\n containsXY(x, y) {\n return this.minX <= x && x <= this.maxX && this.minY <= y && y <= this.maxY;\n }\n\n /**\n * @param {TileRange} tileRange Tile range.\n * @return {boolean} Equals.\n */\n equals(tileRange) {\n return (\n this.minX == tileRange.minX &&\n this.minY == tileRange.minY &&\n this.maxX == tileRange.maxX &&\n this.maxY == tileRange.maxY\n );\n }\n\n /**\n * @param {TileRange} tileRange Tile range.\n */\n extend(tileRange) {\n if (tileRange.minX < this.minX) {\n this.minX = tileRange.minX;\n }\n if (tileRange.maxX > this.maxX) {\n this.maxX = tileRange.maxX;\n }\n if (tileRange.minY < this.minY) {\n this.minY = tileRange.minY;\n }\n if (tileRange.maxY > this.maxY) {\n this.maxY = tileRange.maxY;\n }\n }\n\n /**\n * @return {number} Height.\n */\n getHeight() {\n return this.maxY - this.minY + 1;\n }\n\n /**\n * @return {import(\"./size.js\").Size} Size.\n */\n getSize() {\n return [this.getWidth(), this.getHeight()];\n }\n\n /**\n * @return {number} Width.\n */\n getWidth() {\n return this.maxX - this.minX + 1;\n }\n\n /**\n * @param {TileRange} tileRange Tile range.\n * @return {boolean} Intersects.\n */\n intersects(tileRange) {\n return (\n this.minX <= tileRange.maxX &&\n this.maxX >= tileRange.minX &&\n this.minY <= tileRange.maxY &&\n this.maxY >= tileRange.minY\n );\n }\n}\n\n/**\n * @param {number} minX Minimum X.\n * @param {number} maxX Maximum X.\n * @param {number} minY Minimum Y.\n * @param {number} maxY Maximum Y.\n * @param {TileRange} [tileRange] TileRange.\n * @return {TileRange} Tile range.\n */\nexport function createOrUpdate(minX, maxX, minY, maxY, tileRange) {\n if (tileRange !== undefined) {\n tileRange.minX = minX;\n tileRange.maxX = maxX;\n tileRange.minY = minY;\n tileRange.maxY = maxY;\n return tileRange;\n }\n return new TileRange(minX, maxX, minY, maxY);\n}\n\nexport default TileRange;\n","/**\n * @module ol/VectorRenderTile\n */\nimport Tile from './Tile.js';\nimport {createCanvasContext2D, releaseCanvas} from './dom.js';\nimport {getUid} from './util.js';\n\n/**\n * @typedef {Object} ReplayState\n * @property {boolean} dirty Dirty.\n * @property {null|import(\"./render.js\").OrderFunction} renderedRenderOrder RenderedRenderOrder.\n * @property {number} renderedTileRevision RenderedTileRevision.\n * @property {number} renderedResolution RenderedResolution.\n * @property {number} renderedRevision RenderedRevision.\n * @property {number} renderedTileResolution RenderedTileResolution.\n * @property {number} renderedTileZ RenderedTileZ.\n */\n\n/**\n * @type {Array}\n */\nconst canvasPool = [];\n\nclass VectorRenderTile extends Tile {\n /**\n * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {import(\"./TileState.js\").default} state State.\n * @param {import(\"./tilecoord.js\").TileCoord} urlTileCoord Wrapped tile coordinate for source urls.\n * @param {function(VectorRenderTile):Array} getSourceTiles Function\n * to get source tiles for this tile.\n */\n constructor(tileCoord, state, urlTileCoord, getSourceTiles) {\n super(tileCoord, state, {transition: 0});\n\n /**\n * @private\n * @type {!Object}\n */\n this.context_ = {};\n\n /**\n * Executor groups by layer uid. Entries are read/written by the renderer.\n * @type {Object>}\n */\n this.executorGroups = {};\n\n /**\n * Executor groups for decluttering, by layer uid. Entries are read/written by the renderer.\n * @type {Object>}\n */\n this.declutterExecutorGroups = {};\n\n /**\n * Number of loading source tiles. Read/written by the source.\n * @type {number}\n */\n this.loadingSourceTiles = 0;\n\n /**\n * @type {Object}\n */\n this.hitDetectionImageData = {};\n\n /**\n * @private\n * @type {!Object}\n */\n this.replayState_ = {};\n\n /**\n * @type {Array}\n */\n this.sourceTiles = [];\n\n /**\n * @type {Object}\n */\n this.errorTileKeys = {};\n\n /**\n * @type {number}\n */\n this.wantedResolution;\n\n /**\n * @type {!function():Array}\n */\n this.getSourceTiles = getSourceTiles.bind(undefined, this);\n\n /**\n * @type {import(\"./tilecoord.js\").TileCoord}\n */\n this.wrappedTileCoord = urlTileCoord;\n }\n\n /**\n * @param {import(\"./layer/Layer.js\").default} layer Layer.\n * @return {CanvasRenderingContext2D} The rendering context.\n */\n getContext(layer) {\n const key = getUid(layer);\n if (!(key in this.context_)) {\n this.context_[key] = createCanvasContext2D(1, 1, canvasPool);\n }\n return this.context_[key];\n }\n\n /**\n * @param {import(\"./layer/Layer.js\").default} layer Layer.\n * @return {boolean} Tile has a rendering context for the given layer.\n */\n hasContext(layer) {\n return getUid(layer) in this.context_;\n }\n\n /**\n * Get the Canvas for this tile.\n * @param {import(\"./layer/Layer.js\").default} layer Layer.\n * @return {HTMLCanvasElement} Canvas.\n */\n getImage(layer) {\n return this.hasContext(layer) ? this.getContext(layer).canvas : null;\n }\n\n /**\n * @param {import(\"./layer/Layer.js\").default} layer Layer.\n * @return {ReplayState} The replay state.\n */\n getReplayState(layer) {\n const key = getUid(layer);\n if (!(key in this.replayState_)) {\n this.replayState_[key] = {\n dirty: false,\n renderedRenderOrder: null,\n renderedResolution: NaN,\n renderedRevision: -1,\n renderedTileResolution: NaN,\n renderedTileRevision: -1,\n renderedTileZ: -1,\n };\n }\n return this.replayState_[key];\n }\n\n /**\n * Load the tile.\n */\n load() {\n this.getSourceTiles();\n }\n\n /**\n * Remove from the cache due to expiry\n */\n release() {\n for (const key in this.context_) {\n const context = this.context_[key];\n releaseCanvas(context);\n canvasPool.push(context.canvas);\n delete this.context_[key];\n }\n super.release();\n }\n}\n\nexport default VectorRenderTile;\n","/**\n * @module ol/VectorTile\n */\nimport Tile from './Tile.js';\nimport TileState from './TileState.js';\n\nclass VectorTile extends Tile {\n /**\n * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {import(\"./TileState.js\").default} state State.\n * @param {string} src Data source url.\n * @param {import(\"./format/Feature.js\").default} format Feature format.\n * @param {import(\"./Tile.js\").LoadFunction} tileLoadFunction Tile load function.\n * @param {import(\"./Tile.js\").Options} [options] Tile options.\n */\n constructor(tileCoord, state, src, format, tileLoadFunction, options) {\n super(tileCoord, state, options);\n\n /**\n * Extent of this tile; set by the source.\n * @type {import(\"./extent.js\").Extent}\n */\n this.extent = null;\n\n /**\n * @private\n * @type {import(\"./format/Feature.js\").default}\n */\n this.format_ = format;\n\n /**\n * @private\n * @type {Array}\n */\n this.features_ = null;\n\n /**\n * @private\n * @type {import(\"./featureloader.js\").FeatureLoader}\n */\n this.loader_;\n\n /**\n * Feature projection of this tile; set by the source.\n * @type {import(\"./proj/Projection.js\").default}\n */\n this.projection = null;\n\n /**\n * Resolution of this tile; set by the source.\n * @type {number}\n */\n this.resolution;\n\n /**\n * @private\n * @type {import(\"./Tile.js\").LoadFunction}\n */\n this.tileLoadFunction_ = tileLoadFunction;\n\n /**\n * @private\n * @type {string}\n */\n this.url_ = src;\n\n this.key = src;\n }\n\n /**\n * Get the feature format assigned for reading this tile's features.\n * @return {import(\"./format/Feature.js\").default} Feature format.\n * @api\n */\n getFormat() {\n return this.format_;\n }\n\n /**\n * Get the features for this tile. Geometries will be in the view projection.\n * @return {Array} Features.\n * @api\n */\n getFeatures() {\n return this.features_;\n }\n\n /**\n * Load not yet loaded URI.\n */\n load() {\n if (this.state == TileState.IDLE) {\n this.setState(TileState.LOADING);\n this.tileLoadFunction_(this, this.url_);\n if (this.loader_) {\n this.loader_(this.extent, this.resolution, this.projection);\n }\n }\n }\n\n /**\n * Handler for successful tile load.\n * @param {Array} features The loaded features.\n * @param {import(\"./proj/Projection.js\").default} dataProjection Data projection.\n */\n onLoad(features, dataProjection) {\n this.setFeatures(features);\n }\n\n /**\n * Handler for tile load errors.\n */\n onError() {\n this.setState(TileState.ERROR);\n }\n\n /**\n * Function for use in an {@link module:ol/source/VectorTile~VectorTile}'s `tileLoadFunction`.\n * Sets the features for the tile.\n * @param {Array} features Features.\n * @api\n */\n setFeatures(features) {\n this.features_ = features;\n this.setState(TileState.LOADED);\n }\n\n /**\n * Set the feature loader for reading this tile's features.\n * @param {import(\"./featureloader.js\").FeatureLoader} loader Feature loader.\n * @api\n */\n setLoader(loader) {\n this.loader_ = loader;\n }\n}\n\nexport default VectorTile;\n","/**\n * @module ol/colorlike\n */\nimport {toString} from './color.js';\n\n/**\n * A type accepted by CanvasRenderingContext2D.fillStyle\n * or CanvasRenderingContext2D.strokeStyle.\n * Represents a color, pattern, or gradient. The origin for patterns and\n * gradients as fill style is an increment of 512 css pixels from map coordinate\n * `[0, 0]`. For seamless repeat patterns, width and height of the pattern image\n * must be a factor of two (2, 4, 8, ..., 512).\n *\n * @typedef {string|CanvasPattern|CanvasGradient} ColorLike\n * @api\n */\n\n/**\n * @param {import(\"./color.js\").Color|ColorLike} color Color.\n * @return {ColorLike} The color as an {@link ol/colorlike~ColorLike}.\n * @api\n */\nexport function asColorLike(color) {\n if (Array.isArray(color)) {\n return toString(color);\n }\n return color;\n}\n","/**\n * @module ol/featureloader\n */\nimport {VOID} from './functions.js';\n\n/**\n *\n * @type {boolean}\n * @private\n */\nlet withCredentials = false;\n\n/**\n * {@link module:ol/source/Vector~VectorSource} sources use a function of this type to\n * load features.\n *\n * This function takes up to 5 arguments. These are an {@link module:ol/extent~Extent} representing\n * the area to be loaded, a `{number}` representing the resolution (map units per pixel), an\n * {@link module:ol/proj/Projection~Projection} for the projection, an optional success callback that should get\n * the loaded features passed as an argument and an optional failure callback with no arguments. If\n * the callbacks are not used, the corresponding vector source will not fire `'featuresloadend'` and\n * `'featuresloaderror'` events. `this` within the function is bound to the\n * {@link module:ol/source/Vector~VectorSource} it's called from.\n *\n * The function is responsible for loading the features and adding them to the\n * source.\n * @typedef {function(this:(import(\"./source/Vector\").default|import(\"./VectorTile.js\").default),\n * import(\"./extent.js\").Extent,\n * number,\n * import(\"./proj/Projection.js\").default,\n * function(Array): void=,\n * function(): void=): void} FeatureLoader\n * @api\n */\n\n/**\n * {@link module:ol/source/Vector~VectorSource} sources use a function of this type to\n * get the url to load features from.\n *\n * This function takes an {@link module:ol/extent~Extent} representing the area\n * to be loaded, a `{number}` representing the resolution (map units per pixel)\n * and an {@link module:ol/proj/Projection~Projection} for the projection as\n * arguments and returns a `{string}` representing the URL.\n * @typedef {function(import(\"./extent.js\").Extent, number, import(\"./proj/Projection.js\").default): string} FeatureUrlFunction\n * @api\n */\n\n/**\n * @param {string|FeatureUrlFunction} url Feature URL service.\n * @param {import(\"./format/Feature.js\").default} format Feature format.\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @param {import(\"./proj/Projection.js\").default} projection Projection.\n * @param {function(Array, import(\"./proj/Projection.js\").default): void} success Success\n * Function called with the loaded features and optionally with the data projection.\n * @param {function(): void} failure Failure\n * Function called when loading failed.\n */\nexport function loadFeaturesXhr(\n url,\n format,\n extent,\n resolution,\n projection,\n success,\n failure\n) {\n const xhr = new XMLHttpRequest();\n xhr.open(\n 'GET',\n typeof url === 'function' ? url(extent, resolution, projection) : url,\n true\n );\n if (format.getType() == 'arraybuffer') {\n xhr.responseType = 'arraybuffer';\n }\n xhr.withCredentials = withCredentials;\n /**\n * @param {Event} event Event.\n * @private\n */\n xhr.onload = function (event) {\n // status will be 0 for file:// urls\n if (!xhr.status || (xhr.status >= 200 && xhr.status < 300)) {\n const type = format.getType();\n /** @type {Document|Node|Object|string|undefined} */\n let source;\n if (type == 'json' || type == 'text') {\n source = xhr.responseText;\n } else if (type == 'xml') {\n source = xhr.responseXML;\n if (!source) {\n source = new DOMParser().parseFromString(\n xhr.responseText,\n 'application/xml'\n );\n }\n } else if (type == 'arraybuffer') {\n source = /** @type {ArrayBuffer} */ (xhr.response);\n }\n if (source) {\n success(\n /** @type {Array} */\n (\n format.readFeatures(source, {\n extent: extent,\n featureProjection: projection,\n })\n ),\n format.readProjection(source)\n );\n } else {\n failure();\n }\n } else {\n failure();\n }\n };\n /**\n * @private\n */\n xhr.onerror = failure;\n xhr.send();\n}\n\n/**\n * Create an XHR feature loader for a `url` and `format`. The feature loader\n * loads features (with XHR), parses the features, and adds them to the\n * vector source.\n * @param {string|FeatureUrlFunction} url Feature URL service.\n * @param {import(\"./format/Feature.js\").default} format Feature format.\n * @return {FeatureLoader} The feature loader.\n * @api\n */\nexport function xhr(url, format) {\n /**\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @param {import(\"./proj/Projection.js\").default} projection Projection.\n * @param {function(Array): void} [success] Success\n * Function called when loading succeeded.\n * @param {function(): void} [failure] Failure\n * Function called when loading failed.\n */\n return function (extent, resolution, projection, success, failure) {\n const source = /** @type {import(\"./source/Vector\").default} */ (this);\n loadFeaturesXhr(\n url,\n format,\n extent,\n resolution,\n projection,\n /**\n * @param {Array} features The loaded features.\n * @param {import(\"./proj/Projection.js\").default} dataProjection Data\n * projection.\n */\n function (features, dataProjection) {\n source.addFeatures(features);\n if (success !== undefined) {\n success(features);\n }\n },\n /* FIXME handle error */ failure ? failure : VOID\n );\n };\n}\n\n/**\n * Setter for the withCredentials configuration for the XHR.\n *\n * @param {boolean} xhrWithCredentials The value of withCredentials to set.\n * Compare https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/\n * @api\n */\nexport function setWithCredentials(xhrWithCredentials) {\n withCredentials = xhrWithCredentials;\n}\n","/**\n * @module ol/net\n */\nimport {getUid} from './util.js';\n\n/**\n * Simple JSONP helper. Supports error callbacks and a custom callback param.\n * The error callback will be called when no JSONP is executed after 10 seconds.\n *\n * @param {string} url Request url. A 'callback' query parameter will be\n * appended.\n * @param {Function} callback Callback on success.\n * @param {Function} [errback] Callback on error.\n * @param {string} [callbackParam] Custom query parameter for the JSONP\n * callback. Default is 'callback'.\n */\nexport function jsonp(url, callback, errback, callbackParam) {\n const script = document.createElement('script');\n const key = 'olc_' + getUid(callback);\n function cleanup() {\n delete window[key];\n script.parentNode.removeChild(script);\n }\n script.async = true;\n script.src =\n url +\n (url.includes('?') ? '&' : '?') +\n (callbackParam || 'callback') +\n '=' +\n key;\n const timer = setTimeout(function () {\n cleanup();\n if (errback) {\n errback();\n }\n }, 10000);\n window[key] = function (data) {\n clearTimeout(timer);\n cleanup();\n callback(data);\n };\n document.head.appendChild(script);\n}\n\nexport class ResponseError extends Error {\n /**\n * @param {XMLHttpRequest} response The XHR object.\n */\n constructor(response) {\n const message = 'Unexpected response status: ' + response.status;\n super(message);\n\n /**\n * @type {string}\n */\n this.name = 'ResponseError';\n\n /**\n * @type {XMLHttpRequest}\n */\n this.response = response;\n }\n}\n\nexport class ClientError extends Error {\n /**\n * @param {XMLHttpRequest} client The XHR object.\n */\n constructor(client) {\n super('Failed to issue request');\n\n /**\n * @type {string}\n */\n this.name = 'ClientError';\n\n /**\n * @type {XMLHttpRequest}\n */\n this.client = client;\n }\n}\n\n/**\n * @param {string} url The URL.\n * @return {Promise} A promise that resolves to the JSON response.\n */\nexport function getJSON(url) {\n return new Promise(function (resolve, reject) {\n /**\n * @param {ProgressEvent} event The load event.\n */\n function onLoad(event) {\n const client = event.target;\n // status will be 0 for file:// urls\n if (!client.status || (client.status >= 200 && client.status < 300)) {\n let data;\n try {\n data = JSON.parse(client.responseText);\n } catch (err) {\n const message = 'Error parsing response text as JSON: ' + err.message;\n reject(new Error(message));\n return;\n }\n resolve(data);\n return;\n }\n\n reject(new ResponseError(client));\n }\n\n /**\n * @param {ProgressEvent} event The error event.\n */\n function onError(event) {\n reject(new ClientError(event.target));\n }\n\n const client = new XMLHttpRequest();\n client.addEventListener('load', onLoad);\n client.addEventListener('error', onError);\n client.open('GET', url);\n client.setRequestHeader('Accept', 'application/json');\n client.send();\n });\n}\n\n/**\n * @param {string} base The base URL.\n * @param {string} url The potentially relative URL.\n * @return {string} The full URL.\n */\nexport function resolveUrl(base, url) {\n if (url.includes('://')) {\n return url;\n }\n return new URL(url, base).href;\n}\n\nlet originalXHR;\nexport function overrideXHR(xhr) {\n if (typeof XMLHttpRequest !== 'undefined') {\n originalXHR = XMLHttpRequest;\n }\n global.XMLHttpRequest = xhr;\n}\n\nexport function restoreXHR() {\n global.XMLHttpRequest = originalXHR;\n}\n","/**\n * @module ol/loadingstrategy\n */\n\nimport {fromUserExtent, fromUserResolution, toUserExtent} from './proj.js';\n\n/**\n * Strategy function for loading all features with a single request.\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @return {Array} Extents.\n * @api\n */\nexport function all(extent, resolution) {\n return [[-Infinity, -Infinity, Infinity, Infinity]];\n}\n\n/**\n * Strategy function for loading features based on the view's extent and\n * resolution.\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @return {Array} Extents.\n * @api\n */\nexport function bbox(extent, resolution) {\n return [extent];\n}\n\n/**\n * Creates a strategy function for loading features based on a tile grid.\n * @param {import(\"./tilegrid/TileGrid.js\").default} tileGrid Tile grid.\n * @return {function(import(\"./extent.js\").Extent, number, import(\"./proj.js\").Projection): Array} Loading strategy.\n * @api\n */\nexport function tile(tileGrid) {\n return (\n /**\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @param {import(\"./proj.js\").Projection} projection Projection.\n * @return {Array} Extents.\n */\n function (extent, resolution, projection) {\n const z = tileGrid.getZForResolution(\n fromUserResolution(resolution, projection)\n );\n const tileRange = tileGrid.getTileRangeForExtentAndZ(\n fromUserExtent(extent, projection),\n z\n );\n /** @type {Array} */\n const extents = [];\n /** @type {import(\"./tilecoord.js\").TileCoord} */\n const tileCoord = [z, 0, 0];\n for (\n tileCoord[1] = tileRange.minX;\n tileCoord[1] <= tileRange.maxX;\n ++tileCoord[1]\n ) {\n for (\n tileCoord[2] = tileRange.minY;\n tileCoord[2] <= tileRange.maxY;\n ++tileCoord[2]\n ) {\n extents.push(\n toUserExtent(tileGrid.getTileCoordExtent(tileCoord), projection)\n );\n }\n }\n return extents;\n }\n );\n}\n","/**\n * @module ol/render/VectorContext\n */\n\n/**\n * @classdesc\n * Context for drawing geometries. A vector context is available on render\n * events and does not need to be constructed directly.\n * @api\n */\nclass VectorContext {\n /**\n * Render a geometry with a custom renderer.\n *\n * @param {import(\"../geom/SimpleGeometry.js\").default} geometry Geometry.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {Function} renderer Renderer.\n * @param {Function} hitDetectionRenderer Renderer.\n */\n drawCustom(geometry, feature, renderer, hitDetectionRenderer) {}\n\n /**\n * Render a geometry.\n *\n * @param {import(\"../geom/Geometry.js\").default} geometry The geometry to render.\n */\n drawGeometry(geometry) {}\n\n /**\n * Set the rendering style.\n *\n * @param {import(\"../style/Style.js\").default} style The rendering style.\n */\n setStyle(style) {}\n\n /**\n * @param {import(\"../geom/Circle.js\").default} circleGeometry Circle geometry.\n * @param {import(\"../Feature.js\").default} feature Feature.\n */\n drawCircle(circleGeometry, feature) {}\n\n /**\n * @param {import(\"../Feature.js\").default} feature Feature.\n * @param {import(\"../style/Style.js\").default} style Style.\n */\n drawFeature(feature, style) {}\n\n /**\n * @param {import(\"../geom/GeometryCollection.js\").default} geometryCollectionGeometry Geometry collection.\n * @param {import(\"../Feature.js\").default} feature Feature.\n */\n drawGeometryCollection(geometryCollectionGeometry, feature) {}\n\n /**\n * @param {import(\"../geom/LineString.js\").default|import(\"./Feature.js\").default} lineStringGeometry Line string geometry.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n */\n drawLineString(lineStringGeometry, feature) {}\n\n /**\n * @param {import(\"../geom/MultiLineString.js\").default|import(\"./Feature.js\").default} multiLineStringGeometry MultiLineString geometry.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n */\n drawMultiLineString(multiLineStringGeometry, feature) {}\n\n /**\n * @param {import(\"../geom/MultiPoint.js\").default|import(\"./Feature.js\").default} multiPointGeometry MultiPoint geometry.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n */\n drawMultiPoint(multiPointGeometry, feature) {}\n\n /**\n * @param {import(\"../geom/MultiPolygon.js\").default} multiPolygonGeometry MultiPolygon geometry.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n */\n drawMultiPolygon(multiPolygonGeometry, feature) {}\n\n /**\n * @param {import(\"../geom/Point.js\").default|import(\"./Feature.js\").default} pointGeometry Point geometry.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n */\n drawPoint(pointGeometry, feature) {}\n\n /**\n * @param {import(\"../geom/Polygon.js\").default|import(\"./Feature.js\").default} polygonGeometry Polygon geometry.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n */\n drawPolygon(polygonGeometry, feature) {}\n\n /**\n * @param {import(\"../geom/SimpleGeometry.js\").default|import(\"./Feature.js\").default} geometry Geometry.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n */\n drawText(geometry, feature) {}\n\n /**\n * @param {import(\"../style/Fill.js\").default} fillStyle Fill style.\n * @param {import(\"../style/Stroke.js\").default} strokeStyle Stroke style.\n */\n setFillStrokeStyle(fillStyle, strokeStyle) {}\n\n /**\n * @param {import(\"../style/Image.js\").default} imageStyle Image style.\n * @param {import(\"../render/canvas.js\").DeclutterImageWithText} [declutterImageWithText] Shared data for combined decluttering with a text style.\n */\n setImageStyle(imageStyle, declutterImageWithText) {}\n\n /**\n * @param {import(\"../style/Text.js\").default} textStyle Text style.\n * @param {import(\"../render/canvas.js\").DeclutterImageWithText} [declutterImageWithText] Shared data for combined decluttering with an image style.\n */\n setTextStyle(textStyle, declutterImageWithText) {}\n}\n\nexport default VectorContext;\n","/**\n * @module ol/render/canvas/Immediate\n */\n// FIXME test, especially polygons with holes and multipolygons\n// FIXME need to handle large thick features (where pixel size matters)\n// FIXME add offset and end to ol/geom/flat/transform~transform2D?\n\nimport VectorContext from '../VectorContext.js';\nimport {asColorLike} from '../../colorlike.js';\nimport {\n compose as composeTransform,\n create as createTransform,\n} from '../../transform.js';\nimport {\n defaultFillStyle,\n defaultFont,\n defaultLineCap,\n defaultLineDash,\n defaultLineDashOffset,\n defaultLineJoin,\n defaultLineWidth,\n defaultMiterLimit,\n defaultStrokeStyle,\n defaultTextAlign,\n defaultTextBaseline,\n} from '../canvas.js';\nimport {equals} from '../../array.js';\nimport {intersects} from '../../extent.js';\nimport {toFixed} from '../../math.js';\nimport {transform2D} from '../../geom/flat/transform.js';\nimport {transformGeom2D} from '../../geom/SimpleGeometry.js';\n\n/**\n * @classdesc\n * A concrete subclass of {@link module:ol/render/VectorContext~VectorContext} that implements\n * direct rendering of features and geometries to an HTML5 Canvas context.\n * Instances of this class are created internally by the library and\n * provided to application code as vectorContext member of the\n * {@link module:ol/render/Event~RenderEvent} object associated with postcompose, precompose and\n * render events emitted by layers and maps.\n */\nclass CanvasImmediateRenderer extends VectorContext {\n /**\n * @param {CanvasRenderingContext2D} context Context.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @param {import(\"../../transform.js\").Transform} transform Transform.\n * @param {number} viewRotation View rotation.\n * @param {number} [squaredTolerance] Optional squared tolerance for simplification.\n * @param {import(\"../../proj.js\").TransformFunction} [userTransform] Transform from user to view projection.\n */\n constructor(\n context,\n pixelRatio,\n extent,\n transform,\n viewRotation,\n squaredTolerance,\n userTransform\n ) {\n super();\n\n /**\n * @private\n * @type {CanvasRenderingContext2D}\n */\n this.context_ = context;\n\n /**\n * @private\n * @type {number}\n */\n this.pixelRatio_ = pixelRatio;\n\n /**\n * @private\n * @type {import(\"../../extent.js\").Extent}\n */\n this.extent_ = extent;\n\n /**\n * @private\n * @type {import(\"../../transform.js\").Transform}\n */\n this.transform_ = transform;\n\n /**\n * @private\n * @type {number}\n */\n this.transformRotation_ = transform\n ? toFixed(Math.atan2(transform[1], transform[0]), 10)\n : 0;\n\n /**\n * @private\n * @type {number}\n */\n this.viewRotation_ = viewRotation;\n\n /**\n * @private\n * @type {number}\n */\n this.squaredTolerance_ = squaredTolerance;\n\n /**\n * @private\n * @type {import(\"../../proj.js\").TransformFunction}\n */\n this.userTransform_ = userTransform;\n\n /**\n * @private\n * @type {?import(\"../canvas.js\").FillState}\n */\n this.contextFillState_ = null;\n\n /**\n * @private\n * @type {?import(\"../canvas.js\").StrokeState}\n */\n this.contextStrokeState_ = null;\n\n /**\n * @private\n * @type {?import(\"../canvas.js\").TextState}\n */\n this.contextTextState_ = null;\n\n /**\n * @private\n * @type {?import(\"../canvas.js\").FillState}\n */\n this.fillState_ = null;\n\n /**\n * @private\n * @type {?import(\"../canvas.js\").StrokeState}\n */\n this.strokeState_ = null;\n\n /**\n * @private\n * @type {HTMLCanvasElement|HTMLVideoElement|HTMLImageElement}\n */\n this.image_ = null;\n\n /**\n * @private\n * @type {number}\n */\n this.imageAnchorX_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.imageAnchorY_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.imageHeight_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.imageOpacity_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.imageOriginX_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.imageOriginY_ = 0;\n\n /**\n * @private\n * @type {boolean}\n */\n this.imageRotateWithView_ = false;\n\n /**\n * @private\n * @type {number}\n */\n this.imageRotation_ = 0;\n\n /**\n * @private\n * @type {import(\"../../size.js\").Size}\n */\n this.imageScale_ = [0, 0];\n\n /**\n * @private\n * @type {number}\n */\n this.imageWidth_ = 0;\n\n /**\n * @private\n * @type {string}\n */\n this.text_ = '';\n\n /**\n * @private\n * @type {number}\n */\n this.textOffsetX_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.textOffsetY_ = 0;\n\n /**\n * @private\n * @type {boolean}\n */\n this.textRotateWithView_ = false;\n\n /**\n * @private\n * @type {number}\n */\n this.textRotation_ = 0;\n\n /**\n * @private\n * @type {import(\"../../size.js\").Size}\n */\n this.textScale_ = [0, 0];\n\n /**\n * @private\n * @type {?import(\"../canvas.js\").FillState}\n */\n this.textFillState_ = null;\n\n /**\n * @private\n * @type {?import(\"../canvas.js\").StrokeState}\n */\n this.textStrokeState_ = null;\n\n /**\n * @private\n * @type {?import(\"../canvas.js\").TextState}\n */\n this.textState_ = null;\n\n /**\n * @private\n * @type {Array}\n */\n this.pixelCoordinates_ = [];\n\n /**\n * @private\n * @type {import(\"../../transform.js\").Transform}\n */\n this.tmpLocalTransform_ = createTransform();\n }\n\n /**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @private\n */\n drawImages_(flatCoordinates, offset, end, stride) {\n if (!this.image_) {\n return;\n }\n const pixelCoordinates = transform2D(\n flatCoordinates,\n offset,\n end,\n stride,\n this.transform_,\n this.pixelCoordinates_\n );\n const context = this.context_;\n const localTransform = this.tmpLocalTransform_;\n const alpha = context.globalAlpha;\n if (this.imageOpacity_ != 1) {\n context.globalAlpha = alpha * this.imageOpacity_;\n }\n let rotation = this.imageRotation_;\n if (this.transformRotation_ === 0) {\n rotation -= this.viewRotation_;\n }\n if (this.imageRotateWithView_) {\n rotation += this.viewRotation_;\n }\n for (let i = 0, ii = pixelCoordinates.length; i < ii; i += 2) {\n const x = pixelCoordinates[i] - this.imageAnchorX_;\n const y = pixelCoordinates[i + 1] - this.imageAnchorY_;\n if (\n rotation !== 0 ||\n this.imageScale_[0] != 1 ||\n this.imageScale_[1] != 1\n ) {\n const centerX = x + this.imageAnchorX_;\n const centerY = y + this.imageAnchorY_;\n composeTransform(\n localTransform,\n centerX,\n centerY,\n 1,\n 1,\n rotation,\n -centerX,\n -centerY\n );\n context.setTransform.apply(context, localTransform);\n context.translate(centerX, centerY);\n context.scale(this.imageScale_[0], this.imageScale_[1]);\n context.drawImage(\n this.image_,\n this.imageOriginX_,\n this.imageOriginY_,\n this.imageWidth_,\n this.imageHeight_,\n -this.imageAnchorX_,\n -this.imageAnchorY_,\n this.imageWidth_,\n this.imageHeight_\n );\n context.setTransform(1, 0, 0, 1, 0, 0);\n } else {\n context.drawImage(\n this.image_,\n this.imageOriginX_,\n this.imageOriginY_,\n this.imageWidth_,\n this.imageHeight_,\n x,\n y,\n this.imageWidth_,\n this.imageHeight_\n );\n }\n }\n if (this.imageOpacity_ != 1) {\n context.globalAlpha = alpha;\n }\n }\n\n /**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @private\n */\n drawText_(flatCoordinates, offset, end, stride) {\n if (!this.textState_ || this.text_ === '') {\n return;\n }\n if (this.textFillState_) {\n this.setContextFillState_(this.textFillState_);\n }\n if (this.textStrokeState_) {\n this.setContextStrokeState_(this.textStrokeState_);\n }\n this.setContextTextState_(this.textState_);\n const pixelCoordinates = transform2D(\n flatCoordinates,\n offset,\n end,\n stride,\n this.transform_,\n this.pixelCoordinates_\n );\n const context = this.context_;\n let rotation = this.textRotation_;\n if (this.transformRotation_ === 0) {\n rotation -= this.viewRotation_;\n }\n if (this.textRotateWithView_) {\n rotation += this.viewRotation_;\n }\n for (; offset < end; offset += stride) {\n const x = pixelCoordinates[offset] + this.textOffsetX_;\n const y = pixelCoordinates[offset + 1] + this.textOffsetY_;\n if (\n rotation !== 0 ||\n this.textScale_[0] != 1 ||\n this.textScale_[1] != 1\n ) {\n context.translate(x - this.textOffsetX_, y - this.textOffsetY_);\n context.rotate(rotation);\n context.translate(this.textOffsetX_, this.textOffsetY_);\n context.scale(this.textScale_[0], this.textScale_[1]);\n if (this.textStrokeState_) {\n context.strokeText(this.text_, 0, 0);\n }\n if (this.textFillState_) {\n context.fillText(this.text_, 0, 0);\n }\n context.setTransform(1, 0, 0, 1, 0, 0);\n } else {\n if (this.textStrokeState_) {\n context.strokeText(this.text_, x, y);\n }\n if (this.textFillState_) {\n context.fillText(this.text_, x, y);\n }\n }\n }\n }\n\n /**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {boolean} close Close.\n * @private\n * @return {number} end End.\n */\n moveToLineTo_(flatCoordinates, offset, end, stride, close) {\n const context = this.context_;\n const pixelCoordinates = transform2D(\n flatCoordinates,\n offset,\n end,\n stride,\n this.transform_,\n this.pixelCoordinates_\n );\n context.moveTo(pixelCoordinates[0], pixelCoordinates[1]);\n let length = pixelCoordinates.length;\n if (close) {\n length -= 2;\n }\n for (let i = 2; i < length; i += 2) {\n context.lineTo(pixelCoordinates[i], pixelCoordinates[i + 1]);\n }\n if (close) {\n context.closePath();\n }\n return end;\n }\n\n /**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @private\n * @return {number} End.\n */\n drawRings_(flatCoordinates, offset, ends, stride) {\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n offset = this.moveToLineTo_(\n flatCoordinates,\n offset,\n ends[i],\n stride,\n true\n );\n }\n return offset;\n }\n\n /**\n * Render a circle geometry into the canvas. Rendering is immediate and uses\n * the current fill and stroke styles.\n *\n * @param {import(\"../../geom/Circle.js\").default} geometry Circle geometry.\n * @api\n */\n drawCircle(geometry) {\n if (!intersects(this.extent_, geometry.getExtent())) {\n return;\n }\n if (this.fillState_ || this.strokeState_) {\n if (this.fillState_) {\n this.setContextFillState_(this.fillState_);\n }\n if (this.strokeState_) {\n this.setContextStrokeState_(this.strokeState_);\n }\n const pixelCoordinates = transformGeom2D(\n geometry,\n this.transform_,\n this.pixelCoordinates_\n );\n const dx = pixelCoordinates[2] - pixelCoordinates[0];\n const dy = pixelCoordinates[3] - pixelCoordinates[1];\n const radius = Math.sqrt(dx * dx + dy * dy);\n const context = this.context_;\n context.beginPath();\n context.arc(\n pixelCoordinates[0],\n pixelCoordinates[1],\n radius,\n 0,\n 2 * Math.PI\n );\n if (this.fillState_) {\n context.fill();\n }\n if (this.strokeState_) {\n context.stroke();\n }\n }\n if (this.text_ !== '') {\n this.drawText_(geometry.getCenter(), 0, 2, 2);\n }\n }\n\n /**\n * Set the rendering style. Note that since this is an immediate rendering API,\n * any `zIndex` on the provided style will be ignored.\n *\n * @param {import(\"../../style/Style.js\").default} style The rendering style.\n * @api\n */\n setStyle(style) {\n this.setFillStrokeStyle(style.getFill(), style.getStroke());\n this.setImageStyle(style.getImage());\n this.setTextStyle(style.getText());\n }\n\n /**\n * @param {import(\"../../transform.js\").Transform} transform Transform.\n */\n setTransform(transform) {\n this.transform_ = transform;\n }\n\n /**\n * Render a geometry into the canvas. Call\n * {@link module:ol/render/canvas/Immediate~CanvasImmediateRenderer#setStyle renderer.setStyle()} first to set the rendering style.\n *\n * @param {import(\"../../geom/Geometry.js\").default|import(\"../Feature.js\").default} geometry The geometry to render.\n * @api\n */\n drawGeometry(geometry) {\n const type = geometry.getType();\n switch (type) {\n case 'Point':\n this.drawPoint(\n /** @type {import(\"../../geom/Point.js\").default} */ (geometry)\n );\n break;\n case 'LineString':\n this.drawLineString(\n /** @type {import(\"../../geom/LineString.js\").default} */ (geometry)\n );\n break;\n case 'Polygon':\n this.drawPolygon(\n /** @type {import(\"../../geom/Polygon.js\").default} */ (geometry)\n );\n break;\n case 'MultiPoint':\n this.drawMultiPoint(\n /** @type {import(\"../../geom/MultiPoint.js\").default} */ (geometry)\n );\n break;\n case 'MultiLineString':\n this.drawMultiLineString(\n /** @type {import(\"../../geom/MultiLineString.js\").default} */ (\n geometry\n )\n );\n break;\n case 'MultiPolygon':\n this.drawMultiPolygon(\n /** @type {import(\"../../geom/MultiPolygon.js\").default} */ (geometry)\n );\n break;\n case 'GeometryCollection':\n this.drawGeometryCollection(\n /** @type {import(\"../../geom/GeometryCollection.js\").default} */ (\n geometry\n )\n );\n break;\n case 'Circle':\n this.drawCircle(\n /** @type {import(\"../../geom/Circle.js\").default} */ (geometry)\n );\n break;\n default:\n }\n }\n\n /**\n * Render a feature into the canvas. Note that any `zIndex` on the provided\n * style will be ignored - features are rendered immediately in the order that\n * this method is called. If you need `zIndex` support, you should be using an\n * {@link module:ol/layer/Vector~VectorLayer} instead.\n *\n * @param {import(\"../../Feature.js\").default} feature Feature.\n * @param {import(\"../../style/Style.js\").default} style Style.\n * @api\n */\n drawFeature(feature, style) {\n const geometry = style.getGeometryFunction()(feature);\n if (!geometry || !intersects(this.extent_, geometry.getExtent())) {\n return;\n }\n this.setStyle(style);\n this.drawGeometry(geometry);\n }\n\n /**\n * Render a GeometryCollection to the canvas. Rendering is immediate and\n * uses the current styles appropriate for each geometry in the collection.\n *\n * @param {import(\"../../geom/GeometryCollection.js\").default} geometry Geometry collection.\n */\n drawGeometryCollection(geometry) {\n const geometries = geometry.getGeometriesArray();\n for (let i = 0, ii = geometries.length; i < ii; ++i) {\n this.drawGeometry(geometries[i]);\n }\n }\n\n /**\n * Render a Point geometry into the canvas. Rendering is immediate and uses\n * the current style.\n *\n * @param {import(\"../../geom/Point.js\").default|import(\"../Feature.js\").default} geometry Point geometry.\n */\n drawPoint(geometry) {\n if (this.squaredTolerance_) {\n geometry = /** @type {import(\"../../geom/Point.js\").default} */ (\n geometry.simplifyTransformed(\n this.squaredTolerance_,\n this.userTransform_\n )\n );\n }\n const flatCoordinates = geometry.getFlatCoordinates();\n const stride = geometry.getStride();\n if (this.image_) {\n this.drawImages_(flatCoordinates, 0, flatCoordinates.length, stride);\n }\n if (this.text_ !== '') {\n this.drawText_(flatCoordinates, 0, flatCoordinates.length, stride);\n }\n }\n\n /**\n * Render a MultiPoint geometry into the canvas. Rendering is immediate and\n * uses the current style.\n *\n * @param {import(\"../../geom/MultiPoint.js\").default|import(\"../Feature.js\").default} geometry MultiPoint geometry.\n */\n drawMultiPoint(geometry) {\n if (this.squaredTolerance_) {\n geometry = /** @type {import(\"../../geom/MultiPoint.js\").default} */ (\n geometry.simplifyTransformed(\n this.squaredTolerance_,\n this.userTransform_\n )\n );\n }\n const flatCoordinates = geometry.getFlatCoordinates();\n const stride = geometry.getStride();\n if (this.image_) {\n this.drawImages_(flatCoordinates, 0, flatCoordinates.length, stride);\n }\n if (this.text_ !== '') {\n this.drawText_(flatCoordinates, 0, flatCoordinates.length, stride);\n }\n }\n\n /**\n * Render a LineString into the canvas. Rendering is immediate and uses\n * the current style.\n *\n * @param {import(\"../../geom/LineString.js\").default|import(\"../Feature.js\").default} geometry LineString geometry.\n */\n drawLineString(geometry) {\n if (this.squaredTolerance_) {\n geometry = /** @type {import(\"../../geom/LineString.js\").default} */ (\n geometry.simplifyTransformed(\n this.squaredTolerance_,\n this.userTransform_\n )\n );\n }\n if (!intersects(this.extent_, geometry.getExtent())) {\n return;\n }\n if (this.strokeState_) {\n this.setContextStrokeState_(this.strokeState_);\n const context = this.context_;\n const flatCoordinates = geometry.getFlatCoordinates();\n context.beginPath();\n this.moveToLineTo_(\n flatCoordinates,\n 0,\n flatCoordinates.length,\n geometry.getStride(),\n false\n );\n context.stroke();\n }\n if (this.text_ !== '') {\n const flatMidpoint = geometry.getFlatMidpoint();\n this.drawText_(flatMidpoint, 0, 2, 2);\n }\n }\n\n /**\n * Render a MultiLineString geometry into the canvas. Rendering is immediate\n * and uses the current style.\n *\n * @param {import(\"../../geom/MultiLineString.js\").default|import(\"../Feature.js\").default} geometry MultiLineString geometry.\n */\n drawMultiLineString(geometry) {\n if (this.squaredTolerance_) {\n geometry =\n /** @type {import(\"../../geom/MultiLineString.js\").default} */ (\n geometry.simplifyTransformed(\n this.squaredTolerance_,\n this.userTransform_\n )\n );\n }\n const geometryExtent = geometry.getExtent();\n if (!intersects(this.extent_, geometryExtent)) {\n return;\n }\n if (this.strokeState_) {\n this.setContextStrokeState_(this.strokeState_);\n const context = this.context_;\n const flatCoordinates = geometry.getFlatCoordinates();\n let offset = 0;\n const ends = /** @type {Array} */ (geometry.getEnds());\n const stride = geometry.getStride();\n context.beginPath();\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n offset = this.moveToLineTo_(\n flatCoordinates,\n offset,\n ends[i],\n stride,\n false\n );\n }\n context.stroke();\n }\n if (this.text_ !== '') {\n const flatMidpoints = geometry.getFlatMidpoints();\n this.drawText_(flatMidpoints, 0, flatMidpoints.length, 2);\n }\n }\n\n /**\n * Render a Polygon geometry into the canvas. Rendering is immediate and uses\n * the current style.\n *\n * @param {import(\"../../geom/Polygon.js\").default|import(\"../Feature.js\").default} geometry Polygon geometry.\n */\n drawPolygon(geometry) {\n if (this.squaredTolerance_) {\n geometry = /** @type {import(\"../../geom/Polygon.js\").default} */ (\n geometry.simplifyTransformed(\n this.squaredTolerance_,\n this.userTransform_\n )\n );\n }\n if (!intersects(this.extent_, geometry.getExtent())) {\n return;\n }\n if (this.strokeState_ || this.fillState_) {\n if (this.fillState_) {\n this.setContextFillState_(this.fillState_);\n }\n if (this.strokeState_) {\n this.setContextStrokeState_(this.strokeState_);\n }\n const context = this.context_;\n context.beginPath();\n this.drawRings_(\n geometry.getOrientedFlatCoordinates(),\n 0,\n /** @type {Array} */ (geometry.getEnds()),\n geometry.getStride()\n );\n if (this.fillState_) {\n context.fill();\n }\n if (this.strokeState_) {\n context.stroke();\n }\n }\n if (this.text_ !== '') {\n const flatInteriorPoint = geometry.getFlatInteriorPoint();\n this.drawText_(flatInteriorPoint, 0, 2, 2);\n }\n }\n\n /**\n * Render MultiPolygon geometry into the canvas. Rendering is immediate and\n * uses the current style.\n * @param {import(\"../../geom/MultiPolygon.js\").default} geometry MultiPolygon geometry.\n */\n drawMultiPolygon(geometry) {\n if (this.squaredTolerance_) {\n geometry = /** @type {import(\"../../geom/MultiPolygon.js\").default} */ (\n geometry.simplifyTransformed(\n this.squaredTolerance_,\n this.userTransform_\n )\n );\n }\n if (!intersects(this.extent_, geometry.getExtent())) {\n return;\n }\n if (this.strokeState_ || this.fillState_) {\n if (this.fillState_) {\n this.setContextFillState_(this.fillState_);\n }\n if (this.strokeState_) {\n this.setContextStrokeState_(this.strokeState_);\n }\n const context = this.context_;\n const flatCoordinates = geometry.getOrientedFlatCoordinates();\n let offset = 0;\n const endss = geometry.getEndss();\n const stride = geometry.getStride();\n context.beginPath();\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n offset = this.drawRings_(flatCoordinates, offset, ends, stride);\n }\n if (this.fillState_) {\n context.fill();\n }\n if (this.strokeState_) {\n context.stroke();\n }\n }\n if (this.text_ !== '') {\n const flatInteriorPoints = geometry.getFlatInteriorPoints();\n this.drawText_(flatInteriorPoints, 0, flatInteriorPoints.length, 2);\n }\n }\n\n /**\n * @param {import(\"../canvas.js\").FillState} fillState Fill state.\n * @private\n */\n setContextFillState_(fillState) {\n const context = this.context_;\n const contextFillState = this.contextFillState_;\n if (!contextFillState) {\n context.fillStyle = fillState.fillStyle;\n this.contextFillState_ = {\n fillStyle: fillState.fillStyle,\n };\n } else {\n if (contextFillState.fillStyle != fillState.fillStyle) {\n contextFillState.fillStyle = fillState.fillStyle;\n context.fillStyle = fillState.fillStyle;\n }\n }\n }\n\n /**\n * @param {import(\"../canvas.js\").StrokeState} strokeState Stroke state.\n * @private\n */\n setContextStrokeState_(strokeState) {\n const context = this.context_;\n const contextStrokeState = this.contextStrokeState_;\n if (!contextStrokeState) {\n context.lineCap = strokeState.lineCap;\n context.setLineDash(strokeState.lineDash);\n context.lineDashOffset = strokeState.lineDashOffset;\n context.lineJoin = strokeState.lineJoin;\n context.lineWidth = strokeState.lineWidth;\n context.miterLimit = strokeState.miterLimit;\n context.strokeStyle = strokeState.strokeStyle;\n this.contextStrokeState_ = {\n lineCap: strokeState.lineCap,\n lineDash: strokeState.lineDash,\n lineDashOffset: strokeState.lineDashOffset,\n lineJoin: strokeState.lineJoin,\n lineWidth: strokeState.lineWidth,\n miterLimit: strokeState.miterLimit,\n strokeStyle: strokeState.strokeStyle,\n };\n } else {\n if (contextStrokeState.lineCap != strokeState.lineCap) {\n contextStrokeState.lineCap = strokeState.lineCap;\n context.lineCap = strokeState.lineCap;\n }\n if (!equals(contextStrokeState.lineDash, strokeState.lineDash)) {\n context.setLineDash(\n (contextStrokeState.lineDash = strokeState.lineDash)\n );\n }\n if (contextStrokeState.lineDashOffset != strokeState.lineDashOffset) {\n contextStrokeState.lineDashOffset = strokeState.lineDashOffset;\n context.lineDashOffset = strokeState.lineDashOffset;\n }\n if (contextStrokeState.lineJoin != strokeState.lineJoin) {\n contextStrokeState.lineJoin = strokeState.lineJoin;\n context.lineJoin = strokeState.lineJoin;\n }\n if (contextStrokeState.lineWidth != strokeState.lineWidth) {\n contextStrokeState.lineWidth = strokeState.lineWidth;\n context.lineWidth = strokeState.lineWidth;\n }\n if (contextStrokeState.miterLimit != strokeState.miterLimit) {\n contextStrokeState.miterLimit = strokeState.miterLimit;\n context.miterLimit = strokeState.miterLimit;\n }\n if (contextStrokeState.strokeStyle != strokeState.strokeStyle) {\n contextStrokeState.strokeStyle = strokeState.strokeStyle;\n context.strokeStyle = strokeState.strokeStyle;\n }\n }\n }\n\n /**\n * @param {import(\"../canvas.js\").TextState} textState Text state.\n * @private\n */\n setContextTextState_(textState) {\n const context = this.context_;\n const contextTextState = this.contextTextState_;\n const textAlign = textState.textAlign\n ? textState.textAlign\n : defaultTextAlign;\n if (!contextTextState) {\n context.font = textState.font;\n context.textAlign = textAlign;\n context.textBaseline = textState.textBaseline;\n this.contextTextState_ = {\n font: textState.font,\n textAlign: textAlign,\n textBaseline: textState.textBaseline,\n };\n } else {\n if (contextTextState.font != textState.font) {\n contextTextState.font = textState.font;\n context.font = textState.font;\n }\n if (contextTextState.textAlign != textAlign) {\n contextTextState.textAlign = textAlign;\n context.textAlign = textAlign;\n }\n if (contextTextState.textBaseline != textState.textBaseline) {\n contextTextState.textBaseline = textState.textBaseline;\n context.textBaseline = textState.textBaseline;\n }\n }\n }\n\n /**\n * Set the fill and stroke style for subsequent draw operations. To clear\n * either fill or stroke styles, pass null for the appropriate parameter.\n *\n * @param {import(\"../../style/Fill.js\").default} fillStyle Fill style.\n * @param {import(\"../../style/Stroke.js\").default} strokeStyle Stroke style.\n */\n setFillStrokeStyle(fillStyle, strokeStyle) {\n if (!fillStyle) {\n this.fillState_ = null;\n } else {\n const fillStyleColor = fillStyle.getColor();\n this.fillState_ = {\n fillStyle: asColorLike(\n fillStyleColor ? fillStyleColor : defaultFillStyle\n ),\n };\n }\n if (!strokeStyle) {\n this.strokeState_ = null;\n } else {\n const strokeStyleColor = strokeStyle.getColor();\n const strokeStyleLineCap = strokeStyle.getLineCap();\n const strokeStyleLineDash = strokeStyle.getLineDash();\n const strokeStyleLineDashOffset = strokeStyle.getLineDashOffset();\n const strokeStyleLineJoin = strokeStyle.getLineJoin();\n const strokeStyleWidth = strokeStyle.getWidth();\n const strokeStyleMiterLimit = strokeStyle.getMiterLimit();\n const lineDash = strokeStyleLineDash\n ? strokeStyleLineDash\n : defaultLineDash;\n this.strokeState_ = {\n lineCap:\n strokeStyleLineCap !== undefined\n ? strokeStyleLineCap\n : defaultLineCap,\n lineDash:\n this.pixelRatio_ === 1\n ? lineDash\n : lineDash.map((n) => n * this.pixelRatio_),\n lineDashOffset:\n (strokeStyleLineDashOffset\n ? strokeStyleLineDashOffset\n : defaultLineDashOffset) * this.pixelRatio_,\n lineJoin:\n strokeStyleLineJoin !== undefined\n ? strokeStyleLineJoin\n : defaultLineJoin,\n lineWidth:\n (strokeStyleWidth !== undefined\n ? strokeStyleWidth\n : defaultLineWidth) * this.pixelRatio_,\n miterLimit:\n strokeStyleMiterLimit !== undefined\n ? strokeStyleMiterLimit\n : defaultMiterLimit,\n strokeStyle: asColorLike(\n strokeStyleColor ? strokeStyleColor : defaultStrokeStyle\n ),\n };\n }\n }\n\n /**\n * Set the image style for subsequent draw operations. Pass null to remove\n * the image style.\n *\n * @param {import(\"../../style/Image.js\").default} imageStyle Image style.\n */\n setImageStyle(imageStyle) {\n let imageSize;\n if (!imageStyle || !(imageSize = imageStyle.getSize())) {\n this.image_ = null;\n return;\n }\n const imagePixelRatio = imageStyle.getPixelRatio(this.pixelRatio_);\n const imageAnchor = imageStyle.getAnchor();\n const imageOrigin = imageStyle.getOrigin();\n this.image_ = imageStyle.getImage(this.pixelRatio_);\n this.imageAnchorX_ = imageAnchor[0] * imagePixelRatio;\n this.imageAnchorY_ = imageAnchor[1] * imagePixelRatio;\n this.imageHeight_ = imageSize[1] * imagePixelRatio;\n this.imageOpacity_ = imageStyle.getOpacity();\n this.imageOriginX_ = imageOrigin[0];\n this.imageOriginY_ = imageOrigin[1];\n this.imageRotateWithView_ = imageStyle.getRotateWithView();\n this.imageRotation_ = imageStyle.getRotation();\n const imageScale = imageStyle.getScaleArray();\n this.imageScale_ = [\n (imageScale[0] * this.pixelRatio_) / imagePixelRatio,\n (imageScale[1] * this.pixelRatio_) / imagePixelRatio,\n ];\n this.imageWidth_ = imageSize[0] * imagePixelRatio;\n }\n\n /**\n * Set the text style for subsequent draw operations. Pass null to\n * remove the text style.\n *\n * @param {import(\"../../style/Text.js\").default} textStyle Text style.\n */\n setTextStyle(textStyle) {\n if (!textStyle) {\n this.text_ = '';\n } else {\n const textFillStyle = textStyle.getFill();\n if (!textFillStyle) {\n this.textFillState_ = null;\n } else {\n const textFillStyleColor = textFillStyle.getColor();\n this.textFillState_ = {\n fillStyle: asColorLike(\n textFillStyleColor ? textFillStyleColor : defaultFillStyle\n ),\n };\n }\n const textStrokeStyle = textStyle.getStroke();\n if (!textStrokeStyle) {\n this.textStrokeState_ = null;\n } else {\n const textStrokeStyleColor = textStrokeStyle.getColor();\n const textStrokeStyleLineCap = textStrokeStyle.getLineCap();\n const textStrokeStyleLineDash = textStrokeStyle.getLineDash();\n const textStrokeStyleLineDashOffset =\n textStrokeStyle.getLineDashOffset();\n const textStrokeStyleLineJoin = textStrokeStyle.getLineJoin();\n const textStrokeStyleWidth = textStrokeStyle.getWidth();\n const textStrokeStyleMiterLimit = textStrokeStyle.getMiterLimit();\n this.textStrokeState_ = {\n lineCap:\n textStrokeStyleLineCap !== undefined\n ? textStrokeStyleLineCap\n : defaultLineCap,\n lineDash: textStrokeStyleLineDash\n ? textStrokeStyleLineDash\n : defaultLineDash,\n lineDashOffset: textStrokeStyleLineDashOffset\n ? textStrokeStyleLineDashOffset\n : defaultLineDashOffset,\n lineJoin:\n textStrokeStyleLineJoin !== undefined\n ? textStrokeStyleLineJoin\n : defaultLineJoin,\n lineWidth:\n textStrokeStyleWidth !== undefined\n ? textStrokeStyleWidth\n : defaultLineWidth,\n miterLimit:\n textStrokeStyleMiterLimit !== undefined\n ? textStrokeStyleMiterLimit\n : defaultMiterLimit,\n strokeStyle: asColorLike(\n textStrokeStyleColor ? textStrokeStyleColor : defaultStrokeStyle\n ),\n };\n }\n const textFont = textStyle.getFont();\n const textOffsetX = textStyle.getOffsetX();\n const textOffsetY = textStyle.getOffsetY();\n const textRotateWithView = textStyle.getRotateWithView();\n const textRotation = textStyle.getRotation();\n const textScale = textStyle.getScaleArray();\n const textText = textStyle.getText();\n const textTextAlign = textStyle.getTextAlign();\n const textTextBaseline = textStyle.getTextBaseline();\n this.textState_ = {\n font: textFont !== undefined ? textFont : defaultFont,\n textAlign:\n textTextAlign !== undefined ? textTextAlign : defaultTextAlign,\n textBaseline:\n textTextBaseline !== undefined\n ? textTextBaseline\n : defaultTextBaseline,\n };\n this.text_ =\n textText !== undefined\n ? Array.isArray(textText)\n ? textText.reduce((acc, t, i) => (acc += i % 2 ? ' ' : t), '')\n : textText\n : '';\n this.textOffsetX_ =\n textOffsetX !== undefined ? this.pixelRatio_ * textOffsetX : 0;\n this.textOffsetY_ =\n textOffsetY !== undefined ? this.pixelRatio_ * textOffsetY : 0;\n this.textRotateWithView_ =\n textRotateWithView !== undefined ? textRotateWithView : false;\n this.textRotation_ = textRotation !== undefined ? textRotation : 0;\n this.textScale_ = [\n this.pixelRatio_ * textScale[0],\n this.pixelRatio_ * textScale[1],\n ];\n }\n }\n}\n\nexport default CanvasImmediateRenderer;\n","/**\n * @module ol/renderer/vector\n */\nimport ImageState from '../ImageState.js';\nimport {getUid} from '../util.js';\n\n/**\n * Feature callback. The callback will be called with three arguments. The first\n * argument is one {@link module:ol/Feature~Feature feature} or {@link module:ol/render/Feature~RenderFeature render feature}\n * at the pixel, the second is the {@link module:ol/layer/Layer~Layer layer} of the feature and will be null for\n * unmanaged layers. The third is the {@link module:ol/geom/SimpleGeometry~SimpleGeometry} of the feature. For features\n * with a GeometryCollection geometry, it will be the first detected geometry from the collection.\n * @template T\n * @typedef {function(import(\"../Feature.js\").FeatureLike, import(\"../layer/Layer.js\").default, import(\"../geom/SimpleGeometry.js\").default): T} FeatureCallback\n */\n\n/**\n * Tolerance for geometry simplification in device pixels.\n * @type {number}\n */\nconst SIMPLIFY_TOLERANCE = 0.5;\n\n/**\n * @const\n * @type {Object}\n */\nconst GEOMETRY_RENDERERS = {\n 'Point': renderPointGeometry,\n 'LineString': renderLineStringGeometry,\n 'Polygon': renderPolygonGeometry,\n 'MultiPoint': renderMultiPointGeometry,\n 'MultiLineString': renderMultiLineStringGeometry,\n 'MultiPolygon': renderMultiPolygonGeometry,\n 'GeometryCollection': renderGeometryCollectionGeometry,\n 'Circle': renderCircleGeometry,\n};\n\n/**\n * @param {import(\"../Feature.js\").FeatureLike} feature1 Feature 1.\n * @param {import(\"../Feature.js\").FeatureLike} feature2 Feature 2.\n * @return {number} Order.\n */\nexport function defaultOrder(feature1, feature2) {\n return parseInt(getUid(feature1), 10) - parseInt(getUid(feature2), 10);\n}\n\n/**\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @return {number} Squared pixel tolerance.\n */\nexport function getSquaredTolerance(resolution, pixelRatio) {\n const tolerance = getTolerance(resolution, pixelRatio);\n return tolerance * tolerance;\n}\n\n/**\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @return {number} Pixel tolerance.\n */\nexport function getTolerance(resolution, pixelRatio) {\n return (SIMPLIFY_TOLERANCE * resolution) / pixelRatio;\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} builderGroup Builder group.\n * @param {import(\"../geom/Circle.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").default} feature Feature.\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} [declutterBuilderGroup] Builder for decluttering.\n */\nfunction renderCircleGeometry(\n builderGroup,\n geometry,\n style,\n feature,\n declutterBuilderGroup\n) {\n const fillStyle = style.getFill();\n const strokeStyle = style.getStroke();\n if (fillStyle || strokeStyle) {\n const circleReplay = builderGroup.getBuilder(style.getZIndex(), 'Circle');\n circleReplay.setFillStrokeStyle(fillStyle, strokeStyle);\n circleReplay.drawCircle(geometry, feature);\n }\n const textStyle = style.getText();\n if (textStyle && textStyle.getText()) {\n const textReplay = (declutterBuilderGroup || builderGroup).getBuilder(\n style.getZIndex(),\n 'Text'\n );\n textReplay.setTextStyle(textStyle);\n textReplay.drawText(geometry, feature);\n }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {function(import(\"../events/Event.js\").default): void} listener Listener function.\n * @param {import(\"../proj.js\").TransformFunction} [transform] Transform from user to view projection.\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} [declutterBuilderGroup] Builder for decluttering.\n * @return {boolean} `true` if style is loading.\n */\nexport function renderFeature(\n replayGroup,\n feature,\n style,\n squaredTolerance,\n listener,\n transform,\n declutterBuilderGroup\n) {\n let loading = false;\n const imageStyle = style.getImage();\n if (imageStyle) {\n const imageState = imageStyle.getImageState();\n if (imageState == ImageState.LOADED || imageState == ImageState.ERROR) {\n imageStyle.unlistenImageChange(listener);\n } else {\n if (imageState == ImageState.IDLE) {\n imageStyle.load();\n }\n imageStyle.listenImageChange(listener);\n loading = true;\n }\n }\n renderFeatureInternal(\n replayGroup,\n feature,\n style,\n squaredTolerance,\n transform,\n declutterBuilderGroup\n );\n\n return loading;\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {import(\"../proj.js\").TransformFunction} [transform] Optional transform function.\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} [declutterBuilderGroup] Builder for decluttering.\n */\nfunction renderFeatureInternal(\n replayGroup,\n feature,\n style,\n squaredTolerance,\n transform,\n declutterBuilderGroup\n) {\n const geometry = style.getGeometryFunction()(feature);\n if (!geometry) {\n return;\n }\n const simplifiedGeometry = geometry.simplifyTransformed(\n squaredTolerance,\n transform\n );\n const renderer = style.getRenderer();\n if (renderer) {\n renderGeometry(replayGroup, simplifiedGeometry, style, feature);\n } else {\n const geometryRenderer = GEOMETRY_RENDERERS[simplifiedGeometry.getType()];\n geometryRenderer(\n replayGroup,\n simplifiedGeometry,\n style,\n feature,\n declutterBuilderGroup\n );\n }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../geom/Geometry.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n */\nfunction renderGeometry(replayGroup, geometry, style, feature) {\n if (geometry.getType() == 'GeometryCollection') {\n const geometries =\n /** @type {import(\"../geom/GeometryCollection.js\").default} */ (\n geometry\n ).getGeometries();\n for (let i = 0, ii = geometries.length; i < ii; ++i) {\n renderGeometry(replayGroup, geometries[i], style, feature);\n }\n return;\n }\n const replay = replayGroup.getBuilder(style.getZIndex(), 'Default');\n replay.drawCustom(\n /** @type {import(\"../geom/SimpleGeometry.js\").default} */ (geometry),\n feature,\n style.getRenderer(),\n style.getHitDetectionRenderer()\n );\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../geom/GeometryCollection.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").default} feature Feature.\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} [declutterBuilderGroup] Builder for decluttering.\n */\nfunction renderGeometryCollectionGeometry(\n replayGroup,\n geometry,\n style,\n feature,\n declutterBuilderGroup\n) {\n const geometries = geometry.getGeometriesArray();\n let i, ii;\n for (i = 0, ii = geometries.length; i < ii; ++i) {\n const geometryRenderer = GEOMETRY_RENDERERS[geometries[i].getType()];\n geometryRenderer(\n replayGroup,\n geometries[i],\n style,\n feature,\n declutterBuilderGroup\n );\n }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} builderGroup Replay group.\n * @param {import(\"../geom/LineString.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} [declutterBuilderGroup] Builder for decluttering.\n */\nfunction renderLineStringGeometry(\n builderGroup,\n geometry,\n style,\n feature,\n declutterBuilderGroup\n) {\n const strokeStyle = style.getStroke();\n if (strokeStyle) {\n const lineStringReplay = builderGroup.getBuilder(\n style.getZIndex(),\n 'LineString'\n );\n lineStringReplay.setFillStrokeStyle(null, strokeStyle);\n lineStringReplay.drawLineString(geometry, feature);\n }\n const textStyle = style.getText();\n if (textStyle && textStyle.getText()) {\n const textReplay = (declutterBuilderGroup || builderGroup).getBuilder(\n style.getZIndex(),\n 'Text'\n );\n textReplay.setTextStyle(textStyle);\n textReplay.drawText(geometry, feature);\n }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} builderGroup Replay group.\n * @param {import(\"../geom/MultiLineString.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} [declutterBuilderGroup] Builder for decluttering.\n */\nfunction renderMultiLineStringGeometry(\n builderGroup,\n geometry,\n style,\n feature,\n declutterBuilderGroup\n) {\n const strokeStyle = style.getStroke();\n if (strokeStyle) {\n const lineStringReplay = builderGroup.getBuilder(\n style.getZIndex(),\n 'LineString'\n );\n lineStringReplay.setFillStrokeStyle(null, strokeStyle);\n lineStringReplay.drawMultiLineString(geometry, feature);\n }\n const textStyle = style.getText();\n if (textStyle && textStyle.getText()) {\n const textReplay = (declutterBuilderGroup || builderGroup).getBuilder(\n style.getZIndex(),\n 'Text'\n );\n textReplay.setTextStyle(textStyle);\n textReplay.drawText(geometry, feature);\n }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} builderGroup Replay group.\n * @param {import(\"../geom/MultiPolygon.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").default} feature Feature.\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} [declutterBuilderGroup] Builder for decluttering.\n */\nfunction renderMultiPolygonGeometry(\n builderGroup,\n geometry,\n style,\n feature,\n declutterBuilderGroup\n) {\n const fillStyle = style.getFill();\n const strokeStyle = style.getStroke();\n if (strokeStyle || fillStyle) {\n const polygonReplay = builderGroup.getBuilder(style.getZIndex(), 'Polygon');\n polygonReplay.setFillStrokeStyle(fillStyle, strokeStyle);\n polygonReplay.drawMultiPolygon(geometry, feature);\n }\n const textStyle = style.getText();\n if (textStyle && textStyle.getText()) {\n const textReplay = (declutterBuilderGroup || builderGroup).getBuilder(\n style.getZIndex(),\n 'Text'\n );\n textReplay.setTextStyle(textStyle);\n textReplay.drawText(geometry, feature);\n }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} builderGroup Replay group.\n * @param {import(\"../geom/Point.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} [declutterBuilderGroup] Builder for decluttering.\n */\nfunction renderPointGeometry(\n builderGroup,\n geometry,\n style,\n feature,\n declutterBuilderGroup\n) {\n const imageStyle = style.getImage();\n const textStyle = style.getText();\n /** @type {import(\"../render/canvas.js\").DeclutterImageWithText} */\n let declutterImageWithText;\n if (imageStyle) {\n if (imageStyle.getImageState() != ImageState.LOADED) {\n return;\n }\n let imageBuilderGroup = builderGroup;\n if (declutterBuilderGroup) {\n const declutterMode = imageStyle.getDeclutterMode();\n if (declutterMode !== 'none') {\n imageBuilderGroup = declutterBuilderGroup;\n if (declutterMode === 'obstacle') {\n // draw in non-declutter group:\n const imageReplay = builderGroup.getBuilder(\n style.getZIndex(),\n 'Image'\n );\n imageReplay.setImageStyle(imageStyle, declutterImageWithText);\n imageReplay.drawPoint(geometry, feature);\n } else if (textStyle && textStyle.getText()) {\n declutterImageWithText = {};\n }\n }\n }\n const imageReplay = imageBuilderGroup.getBuilder(\n style.getZIndex(),\n 'Image'\n );\n imageReplay.setImageStyle(imageStyle, declutterImageWithText);\n imageReplay.drawPoint(geometry, feature);\n }\n if (textStyle && textStyle.getText()) {\n let textBuilderGroup = builderGroup;\n if (declutterBuilderGroup) {\n textBuilderGroup = declutterBuilderGroup;\n }\n const textReplay = textBuilderGroup.getBuilder(style.getZIndex(), 'Text');\n textReplay.setTextStyle(textStyle, declutterImageWithText);\n textReplay.drawText(geometry, feature);\n }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} builderGroup Replay group.\n * @param {import(\"../geom/MultiPoint.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} [declutterBuilderGroup] Builder for decluttering.\n */\nfunction renderMultiPointGeometry(\n builderGroup,\n geometry,\n style,\n feature,\n declutterBuilderGroup\n) {\n const imageStyle = style.getImage();\n const textStyle = style.getText();\n /** @type {import(\"../render/canvas.js\").DeclutterImageWithText} */\n let declutterImageWithText;\n if (imageStyle) {\n if (imageStyle.getImageState() != ImageState.LOADED) {\n return;\n }\n let imageBuilderGroup = builderGroup;\n if (declutterBuilderGroup) {\n const declutterMode = imageStyle.getDeclutterMode();\n if (declutterMode !== 'none') {\n imageBuilderGroup = declutterBuilderGroup;\n if (declutterMode === 'obstacle') {\n // draw in non-declutter group:\n const imageReplay = builderGroup.getBuilder(\n style.getZIndex(),\n 'Image'\n );\n imageReplay.setImageStyle(imageStyle, declutterImageWithText);\n imageReplay.drawMultiPoint(geometry, feature);\n } else if (textStyle && textStyle.getText()) {\n declutterImageWithText = {};\n }\n }\n }\n const imageReplay = imageBuilderGroup.getBuilder(\n style.getZIndex(),\n 'Image'\n );\n imageReplay.setImageStyle(imageStyle, declutterImageWithText);\n imageReplay.drawMultiPoint(geometry, feature);\n }\n if (textStyle && textStyle.getText()) {\n let textBuilderGroup = builderGroup;\n if (declutterBuilderGroup) {\n textBuilderGroup = declutterBuilderGroup;\n }\n const textReplay = textBuilderGroup.getBuilder(style.getZIndex(), 'Text');\n textReplay.setTextStyle(textStyle, declutterImageWithText);\n textReplay.drawText(geometry, feature);\n }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} builderGroup Replay group.\n * @param {import(\"../geom/Polygon.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} [declutterBuilderGroup] Builder for decluttering.\n */\nfunction renderPolygonGeometry(\n builderGroup,\n geometry,\n style,\n feature,\n declutterBuilderGroup\n) {\n const fillStyle = style.getFill();\n const strokeStyle = style.getStroke();\n if (fillStyle || strokeStyle) {\n const polygonReplay = builderGroup.getBuilder(style.getZIndex(), 'Polygon');\n polygonReplay.setFillStrokeStyle(fillStyle, strokeStyle);\n polygonReplay.drawPolygon(geometry, feature);\n }\n const textStyle = style.getText();\n if (textStyle && textStyle.getText()) {\n const textReplay = (declutterBuilderGroup || builderGroup).getBuilder(\n style.getZIndex(),\n 'Text'\n );\n textReplay.setTextStyle(textStyle);\n textReplay.drawText(geometry, feature);\n }\n}\n","/**\n * @module ol/render\n */\nimport CanvasImmediateRenderer from './render/canvas/Immediate.js';\nimport {DEVICE_PIXEL_RATIO} from './has.js';\nimport {\n apply as applyTransform,\n create as createTransform,\n multiply as multiplyTransform,\n scale as scaleTransform,\n} from './transform.js';\nimport {getSquaredTolerance} from './renderer/vector.js';\nimport {getTransformFromProjections, getUserProjection} from './proj.js';\n\n/**\n * @typedef {Object} State\n * @property {CanvasRenderingContext2D} context Canvas context that the layer is being rendered to.\n * @property {import(\"./Feature.js\").FeatureLike} feature Feature.\n * @property {import(\"./geom/SimpleGeometry.js\").default} geometry Geometry.\n * @property {number} pixelRatio Pixel ratio used by the layer renderer.\n * @property {number} resolution Resolution that the render batch was created and optimized for.\n * This is not the view's resolution that is being rendered.\n * @property {number} rotation Rotation of the rendered layer in radians.\n */\n\n/**\n * A function to be used when sorting features before rendering.\n * It takes two instances of {@link module:ol/Feature~Feature} or\n * {@link module:ol/render/Feature~RenderFeature} and returns a `{number}`.\n *\n * @typedef {function(import(\"./Feature.js\").FeatureLike, import(\"./Feature.js\").FeatureLike):number} OrderFunction\n */\n\n/**\n * @typedef {Object} ToContextOptions\n * @property {import(\"./size.js\").Size} [size] Desired size of the canvas in css\n * pixels. When provided, both canvas and css size will be set according to the\n * `pixelRatio`. If not provided, the current canvas and css sizes will not be\n * altered.\n * @property {number} [pixelRatio=window.devicePixelRatio] Pixel ratio (canvas\n * pixel to css pixel ratio) for the canvas.\n */\n\n/**\n * Binds a Canvas Immediate API to a canvas context, to allow drawing geometries\n * to the context's canvas.\n *\n * The units for geometry coordinates are css pixels relative to the top left\n * corner of the canvas element.\n * ```js\n * import {toContext} from 'ol/render.js';\n * import Fill from 'ol/style/Fill.js';\n * import Polygon from 'ol/geom/Polygon.js';\n *\n * const canvas = document.createElement('canvas');\n * const render = toContext(\n * canvas.getContext('2d'),\n * {size: [100, 100]}\n * );\n * render.setFillStrokeStyle(new Fill({ color: blue }));\n * render.drawPolygon(\n * new Polygon([[[0, 0], [100, 100], [100, 0], [0, 0]]])\n * );\n * ```\n *\n * @param {CanvasRenderingContext2D} context Canvas context.\n * @param {ToContextOptions} [options] Options.\n * @return {CanvasImmediateRenderer} Canvas Immediate.\n * @api\n */\nexport function toContext(context, options) {\n const canvas = context.canvas;\n options = options ? options : {};\n const pixelRatio = options.pixelRatio || DEVICE_PIXEL_RATIO;\n const size = options.size;\n if (size) {\n canvas.width = size[0] * pixelRatio;\n canvas.height = size[1] * pixelRatio;\n canvas.style.width = size[0] + 'px';\n canvas.style.height = size[1] + 'px';\n }\n const extent = [0, 0, canvas.width, canvas.height];\n const transform = scaleTransform(createTransform(), pixelRatio, pixelRatio);\n return new CanvasImmediateRenderer(context, pixelRatio, extent, transform, 0);\n}\n\n/**\n * Gets a vector context for drawing to the event's canvas.\n * @param {import(\"./render/Event.js\").default} event Render event.\n * @return {CanvasImmediateRenderer} Vector context.\n * @api\n */\nexport function getVectorContext(event) {\n if (!(event.context instanceof CanvasRenderingContext2D)) {\n throw new Error('Only works for render events from Canvas 2D layers');\n }\n\n // canvas may be at a different pixel ratio than frameState.pixelRatio\n const a = event.inversePixelTransform[0];\n const b = event.inversePixelTransform[1];\n const canvasPixelRatio = Math.sqrt(a * a + b * b);\n const frameState = event.frameState;\n const transform = multiplyTransform(\n event.inversePixelTransform.slice(),\n frameState.coordinateToPixelTransform\n );\n const squaredTolerance = getSquaredTolerance(\n frameState.viewState.resolution,\n canvasPixelRatio\n );\n let userTransform;\n const userProjection = getUserProjection();\n if (userProjection) {\n userTransform = getTransformFromProjections(\n userProjection,\n frameState.viewState.projection\n );\n }\n\n return new CanvasImmediateRenderer(\n event.context,\n canvasPixelRatio,\n frameState.extent,\n transform,\n frameState.viewState.rotation,\n squaredTolerance,\n userTransform\n );\n}\n\n/**\n * Gets the pixel of the event's canvas context from the map viewport's CSS pixel.\n * @param {import(\"./render/Event.js\").default} event Render event.\n * @param {import(\"./pixel.js\").Pixel} pixel CSS pixel relative to the top-left\n * corner of the map viewport.\n * @return {import(\"./pixel.js\").Pixel} Pixel on the event's canvas context.\n * @api\n */\nexport function getRenderPixel(event, pixel) {\n return applyTransform(event.inversePixelTransform, pixel.slice(0));\n}\n","/**\n * @module ol/reproj\n */\nimport {\n containsCoordinate,\n createEmpty,\n extend,\n forEachCorner,\n getCenter,\n getHeight,\n getTopLeft,\n getWidth,\n} from './extent.js';\nimport {createCanvasContext2D, releaseCanvas} from './dom.js';\nimport {getPointResolution, transform} from './proj.js';\nimport {solveLinearSystem} from './math.js';\n\nlet brokenDiagonalRendering_;\n\n/**\n * @type {Array}\n */\nexport const canvasPool = [];\n\n/**\n * This draws a small triangle into a canvas by setting the triangle as the clip region\n * and then drawing a (too large) rectangle\n *\n * @param {CanvasRenderingContext2D} ctx The context in which to draw the triangle\n * @param {number} u1 The x-coordinate of the second point. The first point is 0,0.\n * @param {number} v1 The y-coordinate of the second point.\n * @param {number} u2 The x-coordinate of the third point.\n * @param {number} v2 The y-coordinate of the third point.\n */\nfunction drawTestTriangle(ctx, u1, v1, u2, v2) {\n ctx.beginPath();\n ctx.moveTo(0, 0);\n ctx.lineTo(u1, v1);\n ctx.lineTo(u2, v2);\n ctx.closePath();\n ctx.save();\n ctx.clip();\n ctx.fillRect(0, 0, Math.max(u1, u2) + 1, Math.max(v1, v2));\n ctx.restore();\n}\n\n/**\n * Given the data from getImageData, see if the right values appear at the provided offset.\n * Returns true if either the color or transparency is off\n *\n * @param {Uint8ClampedArray} data The data returned from getImageData\n * @param {number} offset The pixel offset from the start of data.\n * @return {boolean} true if the diagonal rendering is broken\n */\nfunction verifyBrokenDiagonalRendering(data, offset) {\n // the values ought to be close to the rgba(210, 0, 0, 0.75)\n return (\n Math.abs(data[offset * 4] - 210) > 2 ||\n Math.abs(data[offset * 4 + 3] - 0.75 * 255) > 2\n );\n}\n\n/**\n * Determines if the current browser configuration can render triangular clip regions correctly.\n * This value is cached so the function is only expensive the first time called.\n * Firefox on Windows (as of now) does not if HWA is enabled. See https://bugzilla.mozilla.org/show_bug.cgi?id=1606976\n * Chrome works, and everything seems to work on OSX and Android. This function caches the\n * result. I suppose that it is conceivably possible that a browser might flip modes while the app is\n * running, but lets hope not.\n *\n * @return {boolean} true if the Diagonal Rendering is broken.\n */\nfunction isBrokenDiagonalRendering() {\n if (brokenDiagonalRendering_ === undefined) {\n const ctx = createCanvasContext2D(6, 6, canvasPool);\n ctx.globalCompositeOperation = 'lighter';\n ctx.fillStyle = 'rgba(210, 0, 0, 0.75)';\n drawTestTriangle(ctx, 4, 5, 4, 0);\n drawTestTriangle(ctx, 4, 5, 0, 5);\n const data = ctx.getImageData(0, 0, 3, 3).data;\n brokenDiagonalRendering_ =\n verifyBrokenDiagonalRendering(data, 0) ||\n verifyBrokenDiagonalRendering(data, 4) ||\n verifyBrokenDiagonalRendering(data, 8);\n releaseCanvas(ctx);\n canvasPool.push(ctx.canvas);\n }\n\n return brokenDiagonalRendering_;\n}\n\n/**\n * Calculates ideal resolution to use from the source in order to achieve\n * pixel mapping as close as possible to 1:1 during reprojection.\n * The resolution is calculated regardless of what resolutions\n * are actually available in the dataset (TileGrid, Image, ...).\n *\n * @param {import(\"./proj/Projection.js\").default} sourceProj Source projection.\n * @param {import(\"./proj/Projection.js\").default} targetProj Target projection.\n * @param {import(\"./coordinate.js\").Coordinate} targetCenter Target center.\n * @param {number} targetResolution Target resolution.\n * @return {number} The best resolution to use. Can be +-Infinity, NaN or 0.\n */\nexport function calculateSourceResolution(\n sourceProj,\n targetProj,\n targetCenter,\n targetResolution\n) {\n const sourceCenter = transform(targetCenter, targetProj, sourceProj);\n\n // calculate the ideal resolution of the source data\n let sourceResolution = getPointResolution(\n targetProj,\n targetResolution,\n targetCenter\n );\n\n const targetMetersPerUnit = targetProj.getMetersPerUnit();\n if (targetMetersPerUnit !== undefined) {\n sourceResolution *= targetMetersPerUnit;\n }\n const sourceMetersPerUnit = sourceProj.getMetersPerUnit();\n if (sourceMetersPerUnit !== undefined) {\n sourceResolution /= sourceMetersPerUnit;\n }\n\n // Based on the projection properties, the point resolution at the specified\n // coordinates may be slightly different. We need to reverse-compensate this\n // in order to achieve optimal results.\n\n const sourceExtent = sourceProj.getExtent();\n if (!sourceExtent || containsCoordinate(sourceExtent, sourceCenter)) {\n const compensationFactor =\n getPointResolution(sourceProj, sourceResolution, sourceCenter) /\n sourceResolution;\n if (isFinite(compensationFactor) && compensationFactor > 0) {\n sourceResolution /= compensationFactor;\n }\n }\n\n return sourceResolution;\n}\n\n/**\n * Calculates ideal resolution to use from the source in order to achieve\n * pixel mapping as close as possible to 1:1 during reprojection.\n * The resolution is calculated regardless of what resolutions\n * are actually available in the dataset (TileGrid, Image, ...).\n *\n * @param {import(\"./proj/Projection.js\").default} sourceProj Source projection.\n * @param {import(\"./proj/Projection.js\").default} targetProj Target projection.\n * @param {import(\"./extent.js\").Extent} targetExtent Target extent\n * @param {number} targetResolution Target resolution.\n * @return {number} The best resolution to use. Can be +-Infinity, NaN or 0.\n */\nexport function calculateSourceExtentResolution(\n sourceProj,\n targetProj,\n targetExtent,\n targetResolution\n) {\n const targetCenter = getCenter(targetExtent);\n let sourceResolution = calculateSourceResolution(\n sourceProj,\n targetProj,\n targetCenter,\n targetResolution\n );\n\n if (!isFinite(sourceResolution) || sourceResolution <= 0) {\n forEachCorner(targetExtent, function (corner) {\n sourceResolution = calculateSourceResolution(\n sourceProj,\n targetProj,\n corner,\n targetResolution\n );\n return isFinite(sourceResolution) && sourceResolution > 0;\n });\n }\n\n return sourceResolution;\n}\n\n/**\n * @typedef {Object} ImageExtent\n * @property {import(\"./extent.js\").Extent} extent Extent.\n * @property {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} image Image.\n */\n\n/**\n * Renders the source data into new canvas based on the triangulation.\n *\n * @param {number} width Width of the canvas.\n * @param {number} height Height of the canvas.\n * @param {number} pixelRatio Pixel ratio.\n * @param {number} sourceResolution Source resolution.\n * @param {import(\"./extent.js\").Extent} sourceExtent Extent of the data source.\n * @param {number} targetResolution Target resolution.\n * @param {import(\"./extent.js\").Extent} targetExtent Target extent.\n * @param {import(\"./reproj/Triangulation.js\").default} triangulation Calculated triangulation.\n * @param {Array} sources Array of sources.\n * @param {number} gutter Gutter of the sources.\n * @param {boolean} [renderEdges] Render reprojection edges.\n * @param {boolean} [interpolate] Use linear interpolation when resampling.\n * @return {HTMLCanvasElement} Canvas with reprojected data.\n */\nexport function render(\n width,\n height,\n pixelRatio,\n sourceResolution,\n sourceExtent,\n targetResolution,\n targetExtent,\n triangulation,\n sources,\n gutter,\n renderEdges,\n interpolate\n) {\n const context = createCanvasContext2D(\n Math.round(pixelRatio * width),\n Math.round(pixelRatio * height),\n canvasPool\n );\n\n if (!interpolate) {\n context.imageSmoothingEnabled = false;\n }\n\n if (sources.length === 0) {\n return context.canvas;\n }\n\n context.scale(pixelRatio, pixelRatio);\n\n function pixelRound(value) {\n return Math.round(value * pixelRatio) / pixelRatio;\n }\n\n context.globalCompositeOperation = 'lighter';\n\n const sourceDataExtent = createEmpty();\n sources.forEach(function (src, i, arr) {\n extend(sourceDataExtent, src.extent);\n });\n\n const canvasWidthInUnits = getWidth(sourceDataExtent);\n const canvasHeightInUnits = getHeight(sourceDataExtent);\n const stitchContext = createCanvasContext2D(\n Math.round((pixelRatio * canvasWidthInUnits) / sourceResolution),\n Math.round((pixelRatio * canvasHeightInUnits) / sourceResolution),\n canvasPool\n );\n\n if (!interpolate) {\n stitchContext.imageSmoothingEnabled = false;\n }\n\n const stitchScale = pixelRatio / sourceResolution;\n\n sources.forEach(function (src, i, arr) {\n const xPos = src.extent[0] - sourceDataExtent[0];\n const yPos = -(src.extent[3] - sourceDataExtent[3]);\n const srcWidth = getWidth(src.extent);\n const srcHeight = getHeight(src.extent);\n\n // This test should never fail -- but it does. Need to find a fix the upstream condition\n if (src.image.width > 0 && src.image.height > 0) {\n stitchContext.drawImage(\n src.image,\n gutter,\n gutter,\n src.image.width - 2 * gutter,\n src.image.height - 2 * gutter,\n xPos * stitchScale,\n yPos * stitchScale,\n srcWidth * stitchScale,\n srcHeight * stitchScale\n );\n }\n });\n\n const targetTopLeft = getTopLeft(targetExtent);\n\n triangulation.getTriangles().forEach(function (triangle, i, arr) {\n /* Calculate affine transform (src -> dst)\n * Resulting matrix can be used to transform coordinate\n * from `sourceProjection` to destination pixels.\n *\n * To optimize number of context calls and increase numerical stability,\n * we also do the following operations:\n * trans(-topLeftExtentCorner), scale(1 / targetResolution), scale(1, -1)\n * here before solving the linear system so [ui, vi] are pixel coordinates.\n *\n * Src points: xi, yi\n * Dst points: ui, vi\n * Affine coefficients: aij\n *\n * | x0 y0 1 0 0 0 | |a00| |u0|\n * | x1 y1 1 0 0 0 | |a01| |u1|\n * | x2 y2 1 0 0 0 | x |a02| = |u2|\n * | 0 0 0 x0 y0 1 | |a10| |v0|\n * | 0 0 0 x1 y1 1 | |a11| |v1|\n * | 0 0 0 x2 y2 1 | |a12| |v2|\n */\n const source = triangle.source;\n const target = triangle.target;\n let x0 = source[0][0],\n y0 = source[0][1];\n let x1 = source[1][0],\n y1 = source[1][1];\n let x2 = source[2][0],\n y2 = source[2][1];\n // Make sure that everything is on pixel boundaries\n const u0 = pixelRound((target[0][0] - targetTopLeft[0]) / targetResolution);\n const v0 = pixelRound(\n -(target[0][1] - targetTopLeft[1]) / targetResolution\n );\n const u1 = pixelRound((target[1][0] - targetTopLeft[0]) / targetResolution);\n const v1 = pixelRound(\n -(target[1][1] - targetTopLeft[1]) / targetResolution\n );\n const u2 = pixelRound((target[2][0] - targetTopLeft[0]) / targetResolution);\n const v2 = pixelRound(\n -(target[2][1] - targetTopLeft[1]) / targetResolution\n );\n\n // Shift all the source points to improve numerical stability\n // of all the subsequent calculations. The [x0, y0] is used here.\n // This is also used to simplify the linear system.\n const sourceNumericalShiftX = x0;\n const sourceNumericalShiftY = y0;\n x0 = 0;\n y0 = 0;\n x1 -= sourceNumericalShiftX;\n y1 -= sourceNumericalShiftY;\n x2 -= sourceNumericalShiftX;\n y2 -= sourceNumericalShiftY;\n\n const augmentedMatrix = [\n [x1, y1, 0, 0, u1 - u0],\n [x2, y2, 0, 0, u2 - u0],\n [0, 0, x1, y1, v1 - v0],\n [0, 0, x2, y2, v2 - v0],\n ];\n const affineCoefs = solveLinearSystem(augmentedMatrix);\n if (!affineCoefs) {\n return;\n }\n\n context.save();\n context.beginPath();\n\n if (isBrokenDiagonalRendering() || !interpolate) {\n // Make sure that all lines are horizontal or vertical\n context.moveTo(u1, v1);\n // This is the diagonal line. Do it in 4 steps\n const steps = 4;\n const ud = u0 - u1;\n const vd = v0 - v1;\n for (let step = 0; step < steps; step++) {\n // Go horizontally\n context.lineTo(\n u1 + pixelRound(((step + 1) * ud) / steps),\n v1 + pixelRound((step * vd) / (steps - 1))\n );\n // Go vertically\n if (step != steps - 1) {\n context.lineTo(\n u1 + pixelRound(((step + 1) * ud) / steps),\n v1 + pixelRound(((step + 1) * vd) / (steps - 1))\n );\n }\n }\n // We are almost at u0r, v0r\n context.lineTo(u2, v2);\n } else {\n context.moveTo(u1, v1);\n context.lineTo(u0, v0);\n context.lineTo(u2, v2);\n }\n\n context.clip();\n\n context.transform(\n affineCoefs[0],\n affineCoefs[2],\n affineCoefs[1],\n affineCoefs[3],\n u0,\n v0\n );\n\n context.translate(\n sourceDataExtent[0] - sourceNumericalShiftX,\n sourceDataExtent[3] - sourceNumericalShiftY\n );\n\n context.scale(\n sourceResolution / pixelRatio,\n -sourceResolution / pixelRatio\n );\n\n context.drawImage(stitchContext.canvas, 0, 0);\n context.restore();\n });\n\n releaseCanvas(stitchContext);\n canvasPool.push(stitchContext.canvas);\n\n if (renderEdges) {\n context.save();\n\n context.globalCompositeOperation = 'source-over';\n context.strokeStyle = 'black';\n context.lineWidth = 1;\n\n triangulation.getTriangles().forEach(function (triangle, i, arr) {\n const target = triangle.target;\n const u0 = (target[0][0] - targetTopLeft[0]) / targetResolution;\n const v0 = -(target[0][1] - targetTopLeft[1]) / targetResolution;\n const u1 = (target[1][0] - targetTopLeft[0]) / targetResolution;\n const v1 = -(target[1][1] - targetTopLeft[1]) / targetResolution;\n const u2 = (target[2][0] - targetTopLeft[0]) / targetResolution;\n const v2 = -(target[2][1] - targetTopLeft[1]) / targetResolution;\n\n context.beginPath();\n context.moveTo(u1, v1);\n context.lineTo(u0, v0);\n context.lineTo(u2, v2);\n context.closePath();\n context.stroke();\n });\n\n context.restore();\n }\n return context.canvas;\n}\n","/**\n * @module ol/reproj/common\n */\n\n/**\n * Default maximum allowed threshold (in pixels) for reprojection\n * triangulation.\n * @type {number}\n */\nexport const ERROR_THRESHOLD = 0.5;\n","/**\n * @module ol/reproj/Triangulation\n */\nimport {\n boundingExtent,\n createEmpty,\n extendCoordinate,\n getArea,\n getBottomLeft,\n getBottomRight,\n getTopLeft,\n getTopRight,\n getWidth,\n intersects,\n} from '../extent.js';\nimport {getTransform} from '../proj.js';\nimport {modulo} from '../math.js';\n\n/**\n * Single triangle; consists of 3 source points and 3 target points.\n * @typedef {Object} Triangle\n * @property {Array} source Source.\n * @property {Array} target Target.\n */\n\n/**\n * Maximum number of subdivision steps during raster reprojection triangulation.\n * Prevents high memory usage and large number of proj4 calls (for certain\n * transformations and areas). At most `2*(2^this)` triangles are created for\n * each triangulated extent (tile/image).\n * @type {number}\n */\nconst MAX_SUBDIVISION = 10;\n\n/**\n * Maximum allowed size of triangle relative to world width. When transforming\n * corners of world extent between certain projections, the resulting\n * triangulation seems to have zero error and no subdivision is performed. If\n * the triangle width is more than this (relative to world width; 0-1),\n * subdivison is forced (up to `MAX_SUBDIVISION`). Default is `0.25`.\n * @type {number}\n */\nconst MAX_TRIANGLE_WIDTH = 0.25;\n\n/**\n * @classdesc\n * Class containing triangulation of the given target extent.\n * Used for determining source data and the reprojection itself.\n */\nclass Triangulation {\n /**\n * @param {import(\"../proj/Projection.js\").default} sourceProj Source projection.\n * @param {import(\"../proj/Projection.js\").default} targetProj Target projection.\n * @param {import(\"../extent.js\").Extent} targetExtent Target extent to triangulate.\n * @param {import(\"../extent.js\").Extent} maxSourceExtent Maximal source extent that can be used.\n * @param {number} errorThreshold Acceptable error (in source units).\n * @param {?number} destinationResolution The (optional) resolution of the destination.\n */\n constructor(\n sourceProj,\n targetProj,\n targetExtent,\n maxSourceExtent,\n errorThreshold,\n destinationResolution\n ) {\n /**\n * @type {import(\"../proj/Projection.js\").default}\n * @private\n */\n this.sourceProj_ = sourceProj;\n\n /**\n * @type {import(\"../proj/Projection.js\").default}\n * @private\n */\n this.targetProj_ = targetProj;\n\n /** @type {!Object} */\n let transformInvCache = {};\n const transformInv = getTransform(this.targetProj_, this.sourceProj_);\n\n /**\n * @param {import(\"../coordinate.js\").Coordinate} c A coordinate.\n * @return {import(\"../coordinate.js\").Coordinate} Transformed coordinate.\n * @private\n */\n this.transformInv_ = function (c) {\n const key = c[0] + '/' + c[1];\n if (!transformInvCache[key]) {\n transformInvCache[key] = transformInv(c);\n }\n return transformInvCache[key];\n };\n\n /**\n * @type {import(\"../extent.js\").Extent}\n * @private\n */\n this.maxSourceExtent_ = maxSourceExtent;\n\n /**\n * @type {number}\n * @private\n */\n this.errorThresholdSquared_ = errorThreshold * errorThreshold;\n\n /**\n * @type {Array}\n * @private\n */\n this.triangles_ = [];\n\n /**\n * Indicates that the triangulation crosses edge of the source projection.\n * @type {boolean}\n * @private\n */\n this.wrapsXInSource_ = false;\n\n /**\n * @type {boolean}\n * @private\n */\n this.canWrapXInSource_ =\n this.sourceProj_.canWrapX() &&\n !!maxSourceExtent &&\n !!this.sourceProj_.getExtent() &&\n getWidth(maxSourceExtent) == getWidth(this.sourceProj_.getExtent());\n\n /**\n * @type {?number}\n * @private\n */\n this.sourceWorldWidth_ = this.sourceProj_.getExtent()\n ? getWidth(this.sourceProj_.getExtent())\n : null;\n\n /**\n * @type {?number}\n * @private\n */\n this.targetWorldWidth_ = this.targetProj_.getExtent()\n ? getWidth(this.targetProj_.getExtent())\n : null;\n\n const destinationTopLeft = getTopLeft(targetExtent);\n const destinationTopRight = getTopRight(targetExtent);\n const destinationBottomRight = getBottomRight(targetExtent);\n const destinationBottomLeft = getBottomLeft(targetExtent);\n const sourceTopLeft = this.transformInv_(destinationTopLeft);\n const sourceTopRight = this.transformInv_(destinationTopRight);\n const sourceBottomRight = this.transformInv_(destinationBottomRight);\n const sourceBottomLeft = this.transformInv_(destinationBottomLeft);\n\n /*\n * The maxSubdivision controls how many splittings of the target area can\n * be done. The idea here is to do a linear mapping of the target areas\n * but the actual overal reprojection (can be) extremely non-linear. The\n * default value of MAX_SUBDIVISION was chosen based on mapping a 256x256\n * tile size. However this function is also called to remap canvas rendered\n * layers which can be much larger. This calculation increases the maxSubdivision\n * value by the right factor so that each 256x256 pixel area has\n * MAX_SUBDIVISION divisions.\n */\n const maxSubdivision =\n MAX_SUBDIVISION +\n (destinationResolution\n ? Math.max(\n 0,\n Math.ceil(\n Math.log2(\n getArea(targetExtent) /\n (destinationResolution * destinationResolution * 256 * 256)\n )\n )\n )\n : 0);\n\n this.addQuad_(\n destinationTopLeft,\n destinationTopRight,\n destinationBottomRight,\n destinationBottomLeft,\n sourceTopLeft,\n sourceTopRight,\n sourceBottomRight,\n sourceBottomLeft,\n maxSubdivision\n );\n\n if (this.wrapsXInSource_) {\n let leftBound = Infinity;\n this.triangles_.forEach(function (triangle, i, arr) {\n leftBound = Math.min(\n leftBound,\n triangle.source[0][0],\n triangle.source[1][0],\n triangle.source[2][0]\n );\n });\n\n // Shift triangles to be as close to `leftBound` as possible\n // (if the distance is more than `worldWidth / 2` it can be closer.\n this.triangles_.forEach((triangle) => {\n if (\n Math.max(\n triangle.source[0][0],\n triangle.source[1][0],\n triangle.source[2][0]\n ) -\n leftBound >\n this.sourceWorldWidth_ / 2\n ) {\n const newTriangle = [\n [triangle.source[0][0], triangle.source[0][1]],\n [triangle.source[1][0], triangle.source[1][1]],\n [triangle.source[2][0], triangle.source[2][1]],\n ];\n if (newTriangle[0][0] - leftBound > this.sourceWorldWidth_ / 2) {\n newTriangle[0][0] -= this.sourceWorldWidth_;\n }\n if (newTriangle[1][0] - leftBound > this.sourceWorldWidth_ / 2) {\n newTriangle[1][0] -= this.sourceWorldWidth_;\n }\n if (newTriangle[2][0] - leftBound > this.sourceWorldWidth_ / 2) {\n newTriangle[2][0] -= this.sourceWorldWidth_;\n }\n\n // Rarely (if the extent contains both the dateline and prime meridian)\n // the shift can in turn break some triangles.\n // Detect this here and don't shift in such cases.\n const minX = Math.min(\n newTriangle[0][0],\n newTriangle[1][0],\n newTriangle[2][0]\n );\n const maxX = Math.max(\n newTriangle[0][0],\n newTriangle[1][0],\n newTriangle[2][0]\n );\n if (maxX - minX < this.sourceWorldWidth_ / 2) {\n triangle.source = newTriangle;\n }\n }\n });\n }\n\n transformInvCache = {};\n }\n\n /**\n * Adds triangle to the triangulation.\n * @param {import(\"../coordinate.js\").Coordinate} a The target a coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} b The target b coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} c The target c coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} aSrc The source a coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} bSrc The source b coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} cSrc The source c coordinate.\n * @private\n */\n addTriangle_(a, b, c, aSrc, bSrc, cSrc) {\n this.triangles_.push({\n source: [aSrc, bSrc, cSrc],\n target: [a, b, c],\n });\n }\n\n /**\n * Adds quad (points in clock-wise order) to the triangulation\n * (and reprojects the vertices) if valid.\n * Performs quad subdivision if needed to increase precision.\n *\n * @param {import(\"../coordinate.js\").Coordinate} a The target a coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} b The target b coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} c The target c coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} d The target d coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} aSrc The source a coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} bSrc The source b coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} cSrc The source c coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} dSrc The source d coordinate.\n * @param {number} maxSubdivision Maximal allowed subdivision of the quad.\n * @private\n */\n addQuad_(a, b, c, d, aSrc, bSrc, cSrc, dSrc, maxSubdivision) {\n const sourceQuadExtent = boundingExtent([aSrc, bSrc, cSrc, dSrc]);\n const sourceCoverageX = this.sourceWorldWidth_\n ? getWidth(sourceQuadExtent) / this.sourceWorldWidth_\n : null;\n const sourceWorldWidth = /** @type {number} */ (this.sourceWorldWidth_);\n\n // when the quad is wrapped in the source projection\n // it covers most of the projection extent, but not fully\n const wrapsX =\n this.sourceProj_.canWrapX() &&\n sourceCoverageX > 0.5 &&\n sourceCoverageX < 1;\n\n let needsSubdivision = false;\n\n if (maxSubdivision > 0) {\n if (this.targetProj_.isGlobal() && this.targetWorldWidth_) {\n const targetQuadExtent = boundingExtent([a, b, c, d]);\n const targetCoverageX =\n getWidth(targetQuadExtent) / this.targetWorldWidth_;\n needsSubdivision =\n targetCoverageX > MAX_TRIANGLE_WIDTH || needsSubdivision;\n }\n if (!wrapsX && this.sourceProj_.isGlobal() && sourceCoverageX) {\n needsSubdivision =\n sourceCoverageX > MAX_TRIANGLE_WIDTH || needsSubdivision;\n }\n }\n\n if (!needsSubdivision && this.maxSourceExtent_) {\n if (\n isFinite(sourceQuadExtent[0]) &&\n isFinite(sourceQuadExtent[1]) &&\n isFinite(sourceQuadExtent[2]) &&\n isFinite(sourceQuadExtent[3])\n ) {\n if (!intersects(sourceQuadExtent, this.maxSourceExtent_)) {\n // whole quad outside source projection extent -> ignore\n return;\n }\n }\n }\n\n let isNotFinite = 0;\n\n if (!needsSubdivision) {\n if (\n !isFinite(aSrc[0]) ||\n !isFinite(aSrc[1]) ||\n !isFinite(bSrc[0]) ||\n !isFinite(bSrc[1]) ||\n !isFinite(cSrc[0]) ||\n !isFinite(cSrc[1]) ||\n !isFinite(dSrc[0]) ||\n !isFinite(dSrc[1])\n ) {\n if (maxSubdivision > 0) {\n needsSubdivision = true;\n } else {\n // It might be the case that only 1 of the points is infinite. In this case\n // we can draw a single triangle with the other three points\n isNotFinite =\n (!isFinite(aSrc[0]) || !isFinite(aSrc[1]) ? 8 : 0) +\n (!isFinite(bSrc[0]) || !isFinite(bSrc[1]) ? 4 : 0) +\n (!isFinite(cSrc[0]) || !isFinite(cSrc[1]) ? 2 : 0) +\n (!isFinite(dSrc[0]) || !isFinite(dSrc[1]) ? 1 : 0);\n if (\n isNotFinite != 1 &&\n isNotFinite != 2 &&\n isNotFinite != 4 &&\n isNotFinite != 8\n ) {\n return;\n }\n }\n }\n }\n\n if (maxSubdivision > 0) {\n if (!needsSubdivision) {\n const center = [(a[0] + c[0]) / 2, (a[1] + c[1]) / 2];\n const centerSrc = this.transformInv_(center);\n\n let dx;\n if (wrapsX) {\n const centerSrcEstimX =\n (modulo(aSrc[0], sourceWorldWidth) +\n modulo(cSrc[0], sourceWorldWidth)) /\n 2;\n dx = centerSrcEstimX - modulo(centerSrc[0], sourceWorldWidth);\n } else {\n dx = (aSrc[0] + cSrc[0]) / 2 - centerSrc[0];\n }\n const dy = (aSrc[1] + cSrc[1]) / 2 - centerSrc[1];\n const centerSrcErrorSquared = dx * dx + dy * dy;\n needsSubdivision = centerSrcErrorSquared > this.errorThresholdSquared_;\n }\n if (needsSubdivision) {\n if (Math.abs(a[0] - c[0]) <= Math.abs(a[1] - c[1])) {\n // split horizontally (top & bottom)\n const bc = [(b[0] + c[0]) / 2, (b[1] + c[1]) / 2];\n const bcSrc = this.transformInv_(bc);\n const da = [(d[0] + a[0]) / 2, (d[1] + a[1]) / 2];\n const daSrc = this.transformInv_(da);\n\n this.addQuad_(\n a,\n b,\n bc,\n da,\n aSrc,\n bSrc,\n bcSrc,\n daSrc,\n maxSubdivision - 1\n );\n this.addQuad_(\n da,\n bc,\n c,\n d,\n daSrc,\n bcSrc,\n cSrc,\n dSrc,\n maxSubdivision - 1\n );\n } else {\n // split vertically (left & right)\n const ab = [(a[0] + b[0]) / 2, (a[1] + b[1]) / 2];\n const abSrc = this.transformInv_(ab);\n const cd = [(c[0] + d[0]) / 2, (c[1] + d[1]) / 2];\n const cdSrc = this.transformInv_(cd);\n\n this.addQuad_(\n a,\n ab,\n cd,\n d,\n aSrc,\n abSrc,\n cdSrc,\n dSrc,\n maxSubdivision - 1\n );\n this.addQuad_(\n ab,\n b,\n c,\n cd,\n abSrc,\n bSrc,\n cSrc,\n cdSrc,\n maxSubdivision - 1\n );\n }\n return;\n }\n }\n\n if (wrapsX) {\n if (!this.canWrapXInSource_) {\n return;\n }\n this.wrapsXInSource_ = true;\n }\n\n // Exactly zero or one of *Src is not finite\n // The triangles must have the diagonal line as the first side\n // This is to allow easy code in reproj.s to make it straight for broken\n // browsers that can't handle diagonal clipping\n if ((isNotFinite & 0xb) == 0) {\n this.addTriangle_(a, c, d, aSrc, cSrc, dSrc);\n }\n if ((isNotFinite & 0xe) == 0) {\n this.addTriangle_(a, c, b, aSrc, cSrc, bSrc);\n }\n if (isNotFinite) {\n // Try the other two triangles\n if ((isNotFinite & 0xd) == 0) {\n this.addTriangle_(b, d, a, bSrc, dSrc, aSrc);\n }\n if ((isNotFinite & 0x7) == 0) {\n this.addTriangle_(b, d, c, bSrc, dSrc, cSrc);\n }\n }\n }\n\n /**\n * Calculates extent of the `source` coordinates from all the triangles.\n *\n * @return {import(\"../extent.js\").Extent} Calculated extent.\n */\n calculateSourceExtent() {\n const extent = createEmpty();\n\n this.triangles_.forEach(function (triangle, i, arr) {\n const src = triangle.source;\n extendCoordinate(extent, src[0]);\n extendCoordinate(extent, src[1]);\n extendCoordinate(extent, src[2]);\n });\n\n return extent;\n }\n\n /**\n * @return {Array} Array of the calculated triangles.\n */\n getTriangles() {\n return this.triangles_;\n }\n}\n\nexport default Triangulation;\n","/**\n * @module ol/reproj/Tile\n */\nimport {ERROR_THRESHOLD} from './common.js';\n\nimport EventType from '../events/EventType.js';\nimport Tile from '../Tile.js';\nimport TileState from '../TileState.js';\nimport Triangulation from './Triangulation.js';\nimport {\n calculateSourceExtentResolution,\n canvasPool,\n render as renderReprojected,\n} from '../reproj.js';\nimport {clamp} from '../math.js';\nimport {getArea, getIntersection} from '../extent.js';\nimport {listen, unlistenByKey} from '../events.js';\nimport {releaseCanvas} from '../dom.js';\n\n/**\n * @typedef {function(number, number, number, number) : (import(\"../ImageTile.js\").default)} FunctionType\n */\n\n/**\n * @classdesc\n * Class encapsulating single reprojected tile.\n * See {@link module:ol/source/TileImage~TileImage}.\n *\n */\nclass ReprojTile extends Tile {\n /**\n * @param {import(\"../proj/Projection.js\").default} sourceProj Source projection.\n * @param {import(\"../tilegrid/TileGrid.js\").default} sourceTileGrid Source tile grid.\n * @param {import(\"../proj/Projection.js\").default} targetProj Target projection.\n * @param {import(\"../tilegrid/TileGrid.js\").default} targetTileGrid Target tile grid.\n * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Coordinate of the tile.\n * @param {import(\"../tilecoord.js\").TileCoord} wrappedTileCoord Coordinate of the tile wrapped in X.\n * @param {number} pixelRatio Pixel ratio.\n * @param {number} gutter Gutter of the source tiles.\n * @param {FunctionType} getTileFunction\n * Function returning source tiles (z, x, y, pixelRatio).\n * @param {number} [errorThreshold] Acceptable reprojection error (in px).\n * @param {boolean} [renderEdges] Render reprojection edges.\n * @param {boolean} [interpolate] Use linear interpolation when resampling.\n */\n constructor(\n sourceProj,\n sourceTileGrid,\n targetProj,\n targetTileGrid,\n tileCoord,\n wrappedTileCoord,\n pixelRatio,\n gutter,\n getTileFunction,\n errorThreshold,\n renderEdges,\n interpolate\n ) {\n super(tileCoord, TileState.IDLE, {interpolate: !!interpolate});\n\n /**\n * @private\n * @type {boolean}\n */\n this.renderEdges_ = renderEdges !== undefined ? renderEdges : false;\n\n /**\n * @private\n * @type {number}\n */\n this.pixelRatio_ = pixelRatio;\n\n /**\n * @private\n * @type {number}\n */\n this.gutter_ = gutter;\n\n /**\n * @private\n * @type {HTMLCanvasElement}\n */\n this.canvas_ = null;\n\n /**\n * @private\n * @type {import(\"../tilegrid/TileGrid.js\").default}\n */\n this.sourceTileGrid_ = sourceTileGrid;\n\n /**\n * @private\n * @type {import(\"../tilegrid/TileGrid.js\").default}\n */\n this.targetTileGrid_ = targetTileGrid;\n\n /**\n * @private\n * @type {import(\"../tilecoord.js\").TileCoord}\n */\n this.wrappedTileCoord_ = wrappedTileCoord ? wrappedTileCoord : tileCoord;\n\n /**\n * @private\n * @type {!Array}\n */\n this.sourceTiles_ = [];\n\n /**\n * @private\n * @type {?Array}\n */\n this.sourcesListenerKeys_ = null;\n\n /**\n * @private\n * @type {number}\n */\n this.sourceZ_ = 0;\n\n const targetExtent = targetTileGrid.getTileCoordExtent(\n this.wrappedTileCoord_\n );\n const maxTargetExtent = this.targetTileGrid_.getExtent();\n let maxSourceExtent = this.sourceTileGrid_.getExtent();\n\n const limitedTargetExtent = maxTargetExtent\n ? getIntersection(targetExtent, maxTargetExtent)\n : targetExtent;\n\n if (getArea(limitedTargetExtent) === 0) {\n // Tile is completely outside range -> EMPTY\n // TODO: is it actually correct that the source even creates the tile ?\n this.state = TileState.EMPTY;\n return;\n }\n\n const sourceProjExtent = sourceProj.getExtent();\n if (sourceProjExtent) {\n if (!maxSourceExtent) {\n maxSourceExtent = sourceProjExtent;\n } else {\n maxSourceExtent = getIntersection(maxSourceExtent, sourceProjExtent);\n }\n }\n\n const targetResolution = targetTileGrid.getResolution(\n this.wrappedTileCoord_[0]\n );\n\n const sourceResolution = calculateSourceExtentResolution(\n sourceProj,\n targetProj,\n limitedTargetExtent,\n targetResolution\n );\n\n if (!isFinite(sourceResolution) || sourceResolution <= 0) {\n // invalid sourceResolution -> EMPTY\n // probably edges of the projections when no extent is defined\n this.state = TileState.EMPTY;\n return;\n }\n\n const errorThresholdInPixels =\n errorThreshold !== undefined ? errorThreshold : ERROR_THRESHOLD;\n\n /**\n * @private\n * @type {!import(\"./Triangulation.js\").default}\n */\n this.triangulation_ = new Triangulation(\n sourceProj,\n targetProj,\n limitedTargetExtent,\n maxSourceExtent,\n sourceResolution * errorThresholdInPixels,\n targetResolution\n );\n\n if (this.triangulation_.getTriangles().length === 0) {\n // no valid triangles -> EMPTY\n this.state = TileState.EMPTY;\n return;\n }\n\n this.sourceZ_ = sourceTileGrid.getZForResolution(sourceResolution);\n let sourceExtent = this.triangulation_.calculateSourceExtent();\n\n if (maxSourceExtent) {\n if (sourceProj.canWrapX()) {\n sourceExtent[1] = clamp(\n sourceExtent[1],\n maxSourceExtent[1],\n maxSourceExtent[3]\n );\n sourceExtent[3] = clamp(\n sourceExtent[3],\n maxSourceExtent[1],\n maxSourceExtent[3]\n );\n } else {\n sourceExtent = getIntersection(sourceExtent, maxSourceExtent);\n }\n }\n\n if (!getArea(sourceExtent)) {\n this.state = TileState.EMPTY;\n } else {\n const sourceRange = sourceTileGrid.getTileRangeForExtentAndZ(\n sourceExtent,\n this.sourceZ_\n );\n\n for (let srcX = sourceRange.minX; srcX <= sourceRange.maxX; srcX++) {\n for (let srcY = sourceRange.minY; srcY <= sourceRange.maxY; srcY++) {\n const tile = getTileFunction(this.sourceZ_, srcX, srcY, pixelRatio);\n if (tile) {\n this.sourceTiles_.push(tile);\n }\n }\n }\n\n if (this.sourceTiles_.length === 0) {\n this.state = TileState.EMPTY;\n }\n }\n }\n\n /**\n * Get the HTML Canvas element for this tile.\n * @return {HTMLCanvasElement} Canvas.\n */\n getImage() {\n return this.canvas_;\n }\n\n /**\n * @private\n */\n reproject_() {\n const sources = [];\n this.sourceTiles_.forEach((tile) => {\n if (tile && tile.getState() == TileState.LOADED) {\n sources.push({\n extent: this.sourceTileGrid_.getTileCoordExtent(tile.tileCoord),\n image: tile.getImage(),\n });\n }\n });\n this.sourceTiles_.length = 0;\n\n if (sources.length === 0) {\n this.state = TileState.ERROR;\n } else {\n const z = this.wrappedTileCoord_[0];\n const size = this.targetTileGrid_.getTileSize(z);\n const width = typeof size === 'number' ? size : size[0];\n const height = typeof size === 'number' ? size : size[1];\n const targetResolution = this.targetTileGrid_.getResolution(z);\n const sourceResolution = this.sourceTileGrid_.getResolution(\n this.sourceZ_\n );\n\n const targetExtent = this.targetTileGrid_.getTileCoordExtent(\n this.wrappedTileCoord_\n );\n\n this.canvas_ = renderReprojected(\n width,\n height,\n this.pixelRatio_,\n sourceResolution,\n this.sourceTileGrid_.getExtent(),\n targetResolution,\n targetExtent,\n this.triangulation_,\n sources,\n this.gutter_,\n this.renderEdges_,\n this.interpolate\n );\n\n this.state = TileState.LOADED;\n }\n this.changed();\n }\n\n /**\n * Load not yet loaded URI.\n */\n load() {\n if (this.state == TileState.IDLE) {\n this.state = TileState.LOADING;\n this.changed();\n\n let leftToLoad = 0;\n\n this.sourcesListenerKeys_ = [];\n this.sourceTiles_.forEach((tile) => {\n const state = tile.getState();\n if (state == TileState.IDLE || state == TileState.LOADING) {\n leftToLoad++;\n\n const sourceListenKey = listen(\n tile,\n EventType.CHANGE,\n function (e) {\n const state = tile.getState();\n if (\n state == TileState.LOADED ||\n state == TileState.ERROR ||\n state == TileState.EMPTY\n ) {\n unlistenByKey(sourceListenKey);\n leftToLoad--;\n if (leftToLoad === 0) {\n this.unlistenSources_();\n this.reproject_();\n }\n }\n },\n this\n );\n this.sourcesListenerKeys_.push(sourceListenKey);\n }\n });\n\n if (leftToLoad === 0) {\n setTimeout(this.reproject_.bind(this), 0);\n } else {\n this.sourceTiles_.forEach(function (tile, i, arr) {\n const state = tile.getState();\n if (state == TileState.IDLE) {\n tile.load();\n }\n });\n }\n }\n }\n\n /**\n * @private\n */\n unlistenSources_() {\n this.sourcesListenerKeys_.forEach(unlistenByKey);\n this.sourcesListenerKeys_ = null;\n }\n\n /**\n * Remove from the cache due to expiry\n */\n release() {\n if (this.canvas_) {\n releaseCanvas(this.canvas_.getContext('2d'));\n canvasPool.push(this.canvas_);\n this.canvas_ = null;\n }\n super.release();\n }\n}\n\nexport default ReprojTile;\n","/**\n * @module ol/source/TileEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n /**\n * Triggered when a tile starts loading.\n * @event module:ol/source/Tile.TileSourceEvent#tileloadstart\n * @api\n */\n TILELOADSTART: 'tileloadstart',\n\n /**\n * Triggered when a tile finishes loading, either when its data is loaded,\n * or when loading was aborted because the tile is no longer needed.\n * @event module:ol/source/Tile.TileSourceEvent#tileloadend\n * @api\n */\n TILELOADEND: 'tileloadend',\n\n /**\n * Triggered if tile loading results in an error. Note that this is not the\n * right place to re-fetch tiles. See {@link module:ol/ImageTile~ImageTile#load}\n * for details.\n * @event module:ol/source/Tile.TileSourceEvent#tileloaderror\n * @api\n */\n TILELOADERROR: 'tileloaderror',\n};\n\n/**\n * @typedef {'tileloadstart'|'tileloadend'|'tileloaderror'} TileSourceEventTypes\n */\n","/**\n * @module ol/source/Source\n */\nimport BaseObject from '../Object.js';\nimport {get as getProjection} from '../proj.js';\n\n/**\n * @typedef {'undefined' | 'loading' | 'ready' | 'error'} State\n * State of the source, one of 'undefined', 'loading', 'ready' or 'error'.\n */\n\n/**\n * A function that takes a {@link module:ol/Map~FrameState} and returns a string or\n * an array of strings representing source attributions.\n *\n * @typedef {function(import(\"../Map.js\").FrameState): (string|Array)} Attribution\n */\n\n/**\n * A type that can be used to provide attribution information for data sources.\n *\n * It represents either\n * * a simple string (e.g. `'© Acme Inc.'`)\n * * an array of simple strings (e.g. `['© Acme Inc.', '© Bacme Inc.']`)\n * * a function that returns a string or array of strings ({@link module:ol/source/Source~Attribution})\n *\n * @typedef {string|Array|Attribution} AttributionLike\n */\n\n/**\n * @typedef {Object} Options\n * @property {AttributionLike} [attributions] Attributions.\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection. Default is the view projection.\n * @property {import(\"./Source.js\").State} [state='ready'] State.\n * @property {boolean} [wrapX=false] WrapX.\n * @property {boolean} [interpolate=false] Use interpolated values when resampling. By default,\n * the nearest neighbor is used when resampling.\n */\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for {@link module:ol/layer/Layer~Layer} sources.\n *\n * A generic `change` event is triggered when the state of the source changes.\n * @abstract\n * @api\n */\nclass Source extends BaseObject {\n /**\n * @param {Options} options Source options.\n */\n constructor(options) {\n super();\n\n /**\n * @protected\n * @type {import(\"../proj/Projection.js\").default|null}\n */\n this.projection = getProjection(options.projection);\n\n /**\n * @private\n * @type {?Attribution}\n */\n this.attributions_ = adaptAttributions(options.attributions);\n\n /**\n * @private\n * @type {boolean}\n */\n this.attributionsCollapsible_ =\n options.attributionsCollapsible !== undefined\n ? options.attributionsCollapsible\n : true;\n\n /**\n * This source is currently loading data. Sources that defer loading to the\n * map's tile queue never set this to `true`.\n * @type {boolean}\n */\n this.loading = false;\n\n /**\n * @private\n * @type {import(\"./Source.js\").State}\n */\n this.state_ = options.state !== undefined ? options.state : 'ready';\n\n /**\n * @private\n * @type {boolean}\n */\n this.wrapX_ = options.wrapX !== undefined ? options.wrapX : false;\n\n /**\n * @private\n * @type {boolean}\n */\n this.interpolate_ = !!options.interpolate;\n\n /**\n * @protected\n * @type {function(import(\"../View.js\").ViewOptions):void}\n */\n this.viewResolver = null;\n\n /**\n * @protected\n * @type {function(Error):void}\n */\n this.viewRejector = null;\n\n const self = this;\n /**\n * @private\n * @type {Promise}\n */\n this.viewPromise_ = new Promise(function (resolve, reject) {\n self.viewResolver = resolve;\n self.viewRejector = reject;\n });\n }\n\n /**\n * Get the attribution function for the source.\n * @return {?Attribution} Attribution function.\n * @api\n */\n getAttributions() {\n return this.attributions_;\n }\n\n /**\n * @return {boolean} Attributions are collapsible.\n * @api\n */\n getAttributionsCollapsible() {\n return this.attributionsCollapsible_;\n }\n\n /**\n * Get the projection of the source.\n * @return {import(\"../proj/Projection.js\").default|null} Projection.\n * @api\n */\n getProjection() {\n return this.projection;\n }\n\n /**\n * @param {import(\"../proj/Projection\").default} [projection] Projection.\n * @return {Array|null} Resolutions.\n */\n getResolutions(projection) {\n return null;\n }\n\n /**\n * @return {Promise} A promise for view-related properties.\n */\n getView() {\n return this.viewPromise_;\n }\n\n /**\n * Get the state of the source, see {@link import(\"./Source.js\").State} for possible states.\n * @return {import(\"./Source.js\").State} State.\n * @api\n */\n getState() {\n return this.state_;\n }\n\n /**\n * @return {boolean|undefined} Wrap X.\n */\n getWrapX() {\n return this.wrapX_;\n }\n\n /**\n * @return {boolean} Use linear interpolation when resampling.\n */\n getInterpolate() {\n return this.interpolate_;\n }\n\n /**\n * Refreshes the source. The source will be cleared, and data from the server will be reloaded.\n * @api\n */\n refresh() {\n this.changed();\n }\n\n /**\n * Set the attributions of the source.\n * @param {AttributionLike|undefined} attributions Attributions.\n * Can be passed as `string`, `Array`, {@link module:ol/source/Source~Attribution},\n * or `undefined`.\n * @api\n */\n setAttributions(attributions) {\n this.attributions_ = adaptAttributions(attributions);\n this.changed();\n }\n\n /**\n * Set the state of the source.\n * @param {import(\"./Source.js\").State} state State.\n */\n setState(state) {\n this.state_ = state;\n this.changed();\n }\n}\n\n/**\n * Turns the attributions option into an attributions function.\n * @param {AttributionLike|undefined} attributionLike The attribution option.\n * @return {Attribution|null} An attribution function (or null).\n */\nfunction adaptAttributions(attributionLike) {\n if (!attributionLike) {\n return null;\n }\n if (Array.isArray(attributionLike)) {\n return function (frameState) {\n return attributionLike;\n };\n }\n\n if (typeof attributionLike === 'function') {\n return attributionLike;\n }\n\n return function (frameState) {\n return [attributionLike];\n };\n}\n\nexport default Source;\n","/**\n * @module ol/tilegrid/TileGrid\n */\nimport TileRange, {\n createOrUpdate as createOrUpdateTileRange,\n} from '../TileRange.js';\nimport {DEFAULT_TILE_SIZE} from './common.js';\nimport {assert} from '../asserts.js';\nimport {ceil, clamp, floor} from '../math.js';\nimport {createOrUpdate, getTopLeft} from '../extent.js';\nimport {createOrUpdate as createOrUpdateTileCoord} from '../tilecoord.js';\nimport {intersectsLinearRing} from '../geom/flat/intersectsextent.js';\nimport {isSorted, linearFindNearest} from '../array.js';\nimport {toSize} from '../size.js';\n\n/**\n * @private\n * @type {import(\"../tilecoord.js\").TileCoord}\n */\nconst tmpTileCoord = [0, 0, 0];\n\n/**\n * Number of decimal digits to consider in integer values when rounding.\n * @type {number}\n */\nconst DECIMALS = 5;\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../extent.js\").Extent} [extent] Extent for the tile grid. No tiles outside this\n * extent will be requested by {@link module:ol/source/Tile~TileSource} sources. When no `origin` or\n * `origins` are configured, the `origin` will be set to the top-left corner of the extent.\n * @property {number} [minZoom=0] Minimum zoom.\n * @property {import(\"../coordinate.js\").Coordinate} [origin] The tile grid origin, i.e. where the `x`\n * and `y` axes meet (`[z, 0, 0]`). Tile coordinates increase left to right and downwards. If not\n * specified, `extent` or `origins` must be provided.\n * @property {Array} [origins] Tile grid origins, i.e. where\n * the `x` and `y` axes meet (`[z, 0, 0]`), for each zoom level. If given, the array length\n * should match the length of the `resolutions` array, i.e. each resolution can have a different\n * origin. Tile coordinates increase left to right and downwards. If not specified, `extent` or\n * `origin` must be provided.\n * @property {!Array} resolutions Resolutions. The array index of each resolution needs\n * to match the zoom level. This means that even if a `minZoom` is configured, the resolutions\n * array will have a length of `maxZoom + 1`.\n * @property {Array} [sizes] Number of tile rows and columns\n * of the grid for each zoom level. If specified the values\n * define each zoom level's extent together with the `origin` or `origins`.\n * A grid `extent` can be configured in addition, and will further limit the extent\n * for which tile requests are made by sources. If the bottom-left corner of\n * an extent is used as `origin` or `origins`, then the `y` value must be\n * negative because OpenLayers tile coordinates use the top left as the origin.\n * @property {number|import(\"../size.js\").Size} [tileSize] Tile size.\n * Default is `[256, 256]`.\n * @property {Array} [tileSizes] Tile sizes. If given, the array length\n * should match the length of the `resolutions` array, i.e. each resolution can have a different\n * tile size.\n */\n\n/**\n * @classdesc\n * Base class for setting the grid pattern for sources accessing tiled-image\n * servers.\n * @api\n */\nclass TileGrid {\n /**\n * @param {Options} options Tile grid options.\n */\n constructor(options) {\n /**\n * @protected\n * @type {number}\n */\n this.minZoom = options.minZoom !== undefined ? options.minZoom : 0;\n\n /**\n * @private\n * @type {!Array}\n */\n this.resolutions_ = options.resolutions;\n assert(\n isSorted(\n this.resolutions_,\n function (a, b) {\n return b - a;\n },\n true\n ),\n 17\n ); // `resolutions` must be sorted in descending order\n\n // check if we've got a consistent zoom factor and origin\n let zoomFactor;\n if (!options.origins) {\n for (let i = 0, ii = this.resolutions_.length - 1; i < ii; ++i) {\n if (!zoomFactor) {\n zoomFactor = this.resolutions_[i] / this.resolutions_[i + 1];\n } else {\n if (this.resolutions_[i] / this.resolutions_[i + 1] !== zoomFactor) {\n zoomFactor = undefined;\n break;\n }\n }\n }\n }\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.zoomFactor_ = zoomFactor;\n\n /**\n * @protected\n * @type {number}\n */\n this.maxZoom = this.resolutions_.length - 1;\n\n /**\n * @private\n * @type {import(\"../coordinate.js\").Coordinate|null}\n */\n this.origin_ = options.origin !== undefined ? options.origin : null;\n\n /**\n * @private\n * @type {Array}\n */\n this.origins_ = null;\n if (options.origins !== undefined) {\n this.origins_ = options.origins;\n assert(this.origins_.length == this.resolutions_.length, 20); // Number of `origins` and `resolutions` must be equal\n }\n\n const extent = options.extent;\n\n if (extent !== undefined && !this.origin_ && !this.origins_) {\n this.origin_ = getTopLeft(extent);\n }\n\n assert(\n (!this.origin_ && this.origins_) || (this.origin_ && !this.origins_),\n 18\n ); // Either `origin` or `origins` must be configured, never both\n\n /**\n * @private\n * @type {Array}\n */\n this.tileSizes_ = null;\n if (options.tileSizes !== undefined) {\n this.tileSizes_ = options.tileSizes;\n assert(this.tileSizes_.length == this.resolutions_.length, 19); // Number of `tileSizes` and `resolutions` must be equal\n }\n\n /**\n * @private\n * @type {number|import(\"../size.js\").Size}\n */\n this.tileSize_ =\n options.tileSize !== undefined\n ? options.tileSize\n : !this.tileSizes_\n ? DEFAULT_TILE_SIZE\n : null;\n assert(\n (!this.tileSize_ && this.tileSizes_) ||\n (this.tileSize_ && !this.tileSizes_),\n 22\n ); // Either `tileSize` or `tileSizes` must be configured, never both\n\n /**\n * @private\n * @type {import(\"../extent.js\").Extent}\n */\n this.extent_ = extent !== undefined ? extent : null;\n\n /**\n * @private\n * @type {Array}\n */\n this.fullTileRanges_ = null;\n\n /**\n * @private\n * @type {import(\"../size.js\").Size}\n */\n this.tmpSize_ = [0, 0];\n\n /**\n * @private\n * @type {import(\"../extent.js\").Extent}\n */\n this.tmpExtent_ = [0, 0, 0, 0];\n\n if (options.sizes !== undefined) {\n this.fullTileRanges_ = options.sizes.map(function (size, z) {\n const tileRange = new TileRange(\n Math.min(0, size[0]),\n Math.max(size[0] - 1, -1),\n Math.min(0, size[1]),\n Math.max(size[1] - 1, -1)\n );\n if (extent) {\n const restrictedTileRange = this.getTileRangeForExtentAndZ(extent, z);\n tileRange.minX = Math.max(restrictedTileRange.minX, tileRange.minX);\n tileRange.maxX = Math.min(restrictedTileRange.maxX, tileRange.maxX);\n tileRange.minY = Math.max(restrictedTileRange.minY, tileRange.minY);\n tileRange.maxY = Math.min(restrictedTileRange.maxY, tileRange.maxY);\n }\n return tileRange;\n }, this);\n } else if (extent) {\n this.calculateTileRanges_(extent);\n }\n }\n\n /**\n * Call a function with each tile coordinate for a given extent and zoom level.\n *\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {number} zoom Integer zoom level.\n * @param {function(import(\"../tilecoord.js\").TileCoord): void} callback Function called with each tile coordinate.\n * @api\n */\n forEachTileCoord(extent, zoom, callback) {\n const tileRange = this.getTileRangeForExtentAndZ(extent, zoom);\n for (let i = tileRange.minX, ii = tileRange.maxX; i <= ii; ++i) {\n for (let j = tileRange.minY, jj = tileRange.maxY; j <= jj; ++j) {\n callback([zoom, i, j]);\n }\n }\n }\n\n /**\n * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {function(number, import(\"../TileRange.js\").default): boolean} callback Callback.\n * @param {import(\"../TileRange.js\").default} [tempTileRange] Temporary import(\"../TileRange.js\").default object.\n * @param {import(\"../extent.js\").Extent} [tempExtent] Temporary import(\"../extent.js\").Extent object.\n * @return {boolean} Callback succeeded.\n */\n forEachTileCoordParentTileRange(\n tileCoord,\n callback,\n tempTileRange,\n tempExtent\n ) {\n let tileRange, x, y;\n let tileCoordExtent = null;\n let z = tileCoord[0] - 1;\n if (this.zoomFactor_ === 2) {\n x = tileCoord[1];\n y = tileCoord[2];\n } else {\n tileCoordExtent = this.getTileCoordExtent(tileCoord, tempExtent);\n }\n while (z >= this.minZoom) {\n if (this.zoomFactor_ === 2) {\n x = Math.floor(x / 2);\n y = Math.floor(y / 2);\n tileRange = createOrUpdateTileRange(x, x, y, y, tempTileRange);\n } else {\n tileRange = this.getTileRangeForExtentAndZ(\n tileCoordExtent,\n z,\n tempTileRange\n );\n }\n if (callback(z, tileRange)) {\n return true;\n }\n --z;\n }\n return false;\n }\n\n /**\n * Get the extent for this tile grid, if it was configured.\n * @return {import(\"../extent.js\").Extent} Extent.\n * @api\n */\n getExtent() {\n return this.extent_;\n }\n\n /**\n * Get the maximum zoom level for the grid.\n * @return {number} Max zoom.\n * @api\n */\n getMaxZoom() {\n return this.maxZoom;\n }\n\n /**\n * Get the minimum zoom level for the grid.\n * @return {number} Min zoom.\n * @api\n */\n getMinZoom() {\n return this.minZoom;\n }\n\n /**\n * Get the origin for the grid at the given zoom level.\n * @param {number} z Integer zoom level.\n * @return {import(\"../coordinate.js\").Coordinate} Origin.\n * @api\n */\n getOrigin(z) {\n if (this.origin_) {\n return this.origin_;\n }\n return this.origins_[z];\n }\n\n /**\n * Get the resolution for the given zoom level.\n * @param {number} z Integer zoom level.\n * @return {number} Resolution.\n * @api\n */\n getResolution(z) {\n return this.resolutions_[z];\n }\n\n /**\n * Get the list of resolutions for the tile grid.\n * @return {Array} Resolutions.\n * @api\n */\n getResolutions() {\n return this.resolutions_;\n }\n\n /**\n * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {import(\"../TileRange.js\").default} [tempTileRange] Temporary import(\"../TileRange.js\").default object.\n * @param {import(\"../extent.js\").Extent} [tempExtent] Temporary import(\"../extent.js\").Extent object.\n * @return {import(\"../TileRange.js\").default|null} Tile range.\n */\n getTileCoordChildTileRange(tileCoord, tempTileRange, tempExtent) {\n if (tileCoord[0] < this.maxZoom) {\n if (this.zoomFactor_ === 2) {\n const minX = tileCoord[1] * 2;\n const minY = tileCoord[2] * 2;\n return createOrUpdateTileRange(\n minX,\n minX + 1,\n minY,\n minY + 1,\n tempTileRange\n );\n }\n const tileCoordExtent = this.getTileCoordExtent(\n tileCoord,\n tempExtent || this.tmpExtent_\n );\n return this.getTileRangeForExtentAndZ(\n tileCoordExtent,\n tileCoord[0] + 1,\n tempTileRange\n );\n }\n return null;\n }\n\n /**\n * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {number} z Integer zoom level.\n * @param {import(\"../TileRange.js\").default} [tempTileRange] Temporary import(\"../TileRange.js\").default object.\n * @return {import(\"../TileRange.js\").default|null} Tile range.\n */\n getTileRangeForTileCoordAndZ(tileCoord, z, tempTileRange) {\n if (z > this.maxZoom || z < this.minZoom) {\n return null;\n }\n\n const tileCoordZ = tileCoord[0];\n const tileCoordX = tileCoord[1];\n const tileCoordY = tileCoord[2];\n\n if (z === tileCoordZ) {\n return createOrUpdateTileRange(\n tileCoordX,\n tileCoordY,\n tileCoordX,\n tileCoordY,\n tempTileRange\n );\n }\n\n if (this.zoomFactor_) {\n const factor = Math.pow(this.zoomFactor_, z - tileCoordZ);\n const minX = Math.floor(tileCoordX * factor);\n const minY = Math.floor(tileCoordY * factor);\n if (z < tileCoordZ) {\n return createOrUpdateTileRange(minX, minX, minY, minY, tempTileRange);\n }\n\n const maxX = Math.floor(factor * (tileCoordX + 1)) - 1;\n const maxY = Math.floor(factor * (tileCoordY + 1)) - 1;\n return createOrUpdateTileRange(minX, maxX, minY, maxY, tempTileRange);\n }\n\n const tileCoordExtent = this.getTileCoordExtent(tileCoord, this.tmpExtent_);\n return this.getTileRangeForExtentAndZ(tileCoordExtent, z, tempTileRange);\n }\n\n /**\n * Get the extent for a tile range.\n * @param {number} z Integer zoom level.\n * @param {import(\"../TileRange.js\").default} tileRange Tile range.\n * @param {import(\"../extent.js\").Extent} [tempExtent] Temporary import(\"../extent.js\").Extent object.\n * @return {import(\"../extent.js\").Extent} Extent.\n */\n getTileRangeExtent(z, tileRange, tempExtent) {\n const origin = this.getOrigin(z);\n const resolution = this.getResolution(z);\n const tileSize = toSize(this.getTileSize(z), this.tmpSize_);\n const minX = origin[0] + tileRange.minX * tileSize[0] * resolution;\n const maxX = origin[0] + (tileRange.maxX + 1) * tileSize[0] * resolution;\n const minY = origin[1] + tileRange.minY * tileSize[1] * resolution;\n const maxY = origin[1] + (tileRange.maxY + 1) * tileSize[1] * resolution;\n return createOrUpdate(minX, minY, maxX, maxY, tempExtent);\n }\n\n /**\n * Get a tile range for the given extent and integer zoom level.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {number} z Integer zoom level.\n * @param {import(\"../TileRange.js\").default} [tempTileRange] Temporary tile range object.\n * @return {import(\"../TileRange.js\").default} Tile range.\n */\n getTileRangeForExtentAndZ(extent, z, tempTileRange) {\n this.getTileCoordForXYAndZ_(extent[0], extent[3], z, false, tmpTileCoord);\n const minX = tmpTileCoord[1];\n const minY = tmpTileCoord[2];\n this.getTileCoordForXYAndZ_(extent[2], extent[1], z, true, tmpTileCoord);\n const maxX = tmpTileCoord[1];\n const maxY = tmpTileCoord[2];\n return createOrUpdateTileRange(minX, maxX, minY, maxY, tempTileRange);\n }\n\n /**\n * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @return {import(\"../coordinate.js\").Coordinate} Tile center.\n */\n getTileCoordCenter(tileCoord) {\n const origin = this.getOrigin(tileCoord[0]);\n const resolution = this.getResolution(tileCoord[0]);\n const tileSize = toSize(this.getTileSize(tileCoord[0]), this.tmpSize_);\n return [\n origin[0] + (tileCoord[1] + 0.5) * tileSize[0] * resolution,\n origin[1] - (tileCoord[2] + 0.5) * tileSize[1] * resolution,\n ];\n }\n\n /**\n * Get the extent of a tile coordinate.\n *\n * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {import(\"../extent.js\").Extent} [tempExtent] Temporary extent object.\n * @return {import(\"../extent.js\").Extent} Extent.\n * @api\n */\n getTileCoordExtent(tileCoord, tempExtent) {\n const origin = this.getOrigin(tileCoord[0]);\n const resolution = this.getResolution(tileCoord[0]);\n const tileSize = toSize(this.getTileSize(tileCoord[0]), this.tmpSize_);\n const minX = origin[0] + tileCoord[1] * tileSize[0] * resolution;\n const minY = origin[1] - (tileCoord[2] + 1) * tileSize[1] * resolution;\n const maxX = minX + tileSize[0] * resolution;\n const maxY = minY + tileSize[1] * resolution;\n return createOrUpdate(minX, minY, maxX, maxY, tempExtent);\n }\n\n /**\n * Get the tile coordinate for the given map coordinate and resolution. This\n * method considers that coordinates that intersect tile boundaries should be\n * assigned the higher tile coordinate.\n *\n * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {number} resolution Resolution.\n * @param {import(\"../tilecoord.js\").TileCoord} [opt_tileCoord] Destination import(\"../tilecoord.js\").TileCoord object.\n * @return {import(\"../tilecoord.js\").TileCoord} Tile coordinate.\n * @api\n */\n getTileCoordForCoordAndResolution(coordinate, resolution, opt_tileCoord) {\n return this.getTileCoordForXYAndResolution_(\n coordinate[0],\n coordinate[1],\n resolution,\n false,\n opt_tileCoord\n );\n }\n\n /**\n * Note that this method should not be called for resolutions that correspond\n * to an integer zoom level. Instead call the `getTileCoordForXYAndZ_` method.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {number} resolution Resolution (for a non-integer zoom level).\n * @param {boolean} reverseIntersectionPolicy Instead of letting edge\n * intersections go to the higher tile coordinate, let edge intersections\n * go to the lower tile coordinate.\n * @param {import(\"../tilecoord.js\").TileCoord} [opt_tileCoord] Temporary import(\"../tilecoord.js\").TileCoord object.\n * @return {import(\"../tilecoord.js\").TileCoord} Tile coordinate.\n * @private\n */\n getTileCoordForXYAndResolution_(\n x,\n y,\n resolution,\n reverseIntersectionPolicy,\n opt_tileCoord\n ) {\n const z = this.getZForResolution(resolution);\n const scale = resolution / this.getResolution(z);\n const origin = this.getOrigin(z);\n const tileSize = toSize(this.getTileSize(z), this.tmpSize_);\n\n let tileCoordX = (scale * (x - origin[0])) / resolution / tileSize[0];\n let tileCoordY = (scale * (origin[1] - y)) / resolution / tileSize[1];\n\n if (reverseIntersectionPolicy) {\n tileCoordX = ceil(tileCoordX, DECIMALS) - 1;\n tileCoordY = ceil(tileCoordY, DECIMALS) - 1;\n } else {\n tileCoordX = floor(tileCoordX, DECIMALS);\n tileCoordY = floor(tileCoordY, DECIMALS);\n }\n\n return createOrUpdateTileCoord(z, tileCoordX, tileCoordY, opt_tileCoord);\n }\n\n /**\n * Although there is repetition between this method and `getTileCoordForXYAndResolution_`,\n * they should have separate implementations. This method is for integer zoom\n * levels. The other method should only be called for resolutions corresponding\n * to non-integer zoom levels.\n * @param {number} x Map x coordinate.\n * @param {number} y Map y coordinate.\n * @param {number} z Integer zoom level.\n * @param {boolean} reverseIntersectionPolicy Instead of letting edge\n * intersections go to the higher tile coordinate, let edge intersections\n * go to the lower tile coordinate.\n * @param {import(\"../tilecoord.js\").TileCoord} [opt_tileCoord] Temporary import(\"../tilecoord.js\").TileCoord object.\n * @return {import(\"../tilecoord.js\").TileCoord} Tile coordinate.\n * @private\n */\n getTileCoordForXYAndZ_(x, y, z, reverseIntersectionPolicy, opt_tileCoord) {\n const origin = this.getOrigin(z);\n const resolution = this.getResolution(z);\n const tileSize = toSize(this.getTileSize(z), this.tmpSize_);\n\n let tileCoordX = (x - origin[0]) / resolution / tileSize[0];\n let tileCoordY = (origin[1] - y) / resolution / tileSize[1];\n\n if (reverseIntersectionPolicy) {\n tileCoordX = ceil(tileCoordX, DECIMALS) - 1;\n tileCoordY = ceil(tileCoordY, DECIMALS) - 1;\n } else {\n tileCoordX = floor(tileCoordX, DECIMALS);\n tileCoordY = floor(tileCoordY, DECIMALS);\n }\n\n return createOrUpdateTileCoord(z, tileCoordX, tileCoordY, opt_tileCoord);\n }\n\n /**\n * Get a tile coordinate given a map coordinate and zoom level.\n * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {number} z Zoom level.\n * @param {import(\"../tilecoord.js\").TileCoord} [opt_tileCoord] Destination import(\"../tilecoord.js\").TileCoord object.\n * @return {import(\"../tilecoord.js\").TileCoord} Tile coordinate.\n * @api\n */\n getTileCoordForCoordAndZ(coordinate, z, opt_tileCoord) {\n return this.getTileCoordForXYAndZ_(\n coordinate[0],\n coordinate[1],\n z,\n false,\n opt_tileCoord\n );\n }\n\n /**\n * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @return {number} Tile resolution.\n */\n getTileCoordResolution(tileCoord) {\n return this.resolutions_[tileCoord[0]];\n }\n\n /**\n * Get the tile size for a zoom level. The type of the return value matches the\n * `tileSize` or `tileSizes` that the tile grid was configured with. To always\n * get an {@link import(\"../size.js\").Size}, run the result through {@link module:ol/size.toSize}.\n * @param {number} z Z.\n * @return {number|import(\"../size.js\").Size} Tile size.\n * @api\n */\n getTileSize(z) {\n if (this.tileSize_) {\n return this.tileSize_;\n }\n return this.tileSizes_[z];\n }\n\n /**\n * @param {number} z Zoom level.\n * @return {import(\"../TileRange.js\").default} Extent tile range for the specified zoom level.\n */\n getFullTileRange(z) {\n if (!this.fullTileRanges_) {\n return this.extent_\n ? this.getTileRangeForExtentAndZ(this.extent_, z)\n : null;\n }\n return this.fullTileRanges_[z];\n }\n\n /**\n * @param {number} resolution Resolution.\n * @param {number|import(\"../array.js\").NearestDirectionFunction} [opt_direction]\n * If 0, the nearest resolution will be used.\n * If 1, the nearest higher resolution (lower Z) will be used. If -1, the\n * nearest lower resolution (higher Z) will be used. Default is 0.\n * Use a {@link module:ol/array~NearestDirectionFunction} for more precise control.\n *\n * For example to change tile Z at the midpoint of zoom levels\n * ```js\n * function(value, high, low) {\n * return value - low * Math.sqrt(high / low);\n * }\n * ```\n * @return {number} Z.\n * @api\n */\n getZForResolution(resolution, opt_direction) {\n const z = linearFindNearest(\n this.resolutions_,\n resolution,\n opt_direction || 0\n );\n return clamp(z, this.minZoom, this.maxZoom);\n }\n\n /**\n * The tile with the provided tile coordinate intersects the given viewport.\n * @param {import('../tilecoord.js').TileCoord} tileCoord Tile coordinate.\n * @param {Array} viewport Viewport as returned from {@link module:ol/extent.getRotatedViewport}.\n * @return {boolean} The tile with the provided tile coordinate intersects the given viewport.\n */\n tileCoordIntersectsViewport(tileCoord, viewport) {\n return intersectsLinearRing(\n viewport,\n 0,\n viewport.length,\n 2,\n this.getTileCoordExtent(tileCoord)\n );\n }\n\n /**\n * @param {!import(\"../extent.js\").Extent} extent Extent for this tile grid.\n * @private\n */\n calculateTileRanges_(extent) {\n const length = this.resolutions_.length;\n const fullTileRanges = new Array(length);\n for (let z = this.minZoom; z < length; ++z) {\n fullTileRanges[z] = this.getTileRangeForExtentAndZ(extent, z);\n }\n this.fullTileRanges_ = fullTileRanges;\n }\n}\n\nexport default TileGrid;\n","/**\n * @module ol/tilegrid\n */\nimport TileGrid from './tilegrid/TileGrid.js';\nimport {DEFAULT_MAX_ZOOM, DEFAULT_TILE_SIZE} from './tilegrid/common.js';\nimport {METERS_PER_UNIT, get as getProjection} from './proj.js';\nimport {\n containsCoordinate,\n createOrUpdate,\n getCorner,\n getHeight,\n getWidth,\n} from './extent.js';\nimport {toSize} from './size.js';\n\n/**\n * @param {import(\"./proj/Projection.js\").default} projection Projection.\n * @return {!TileGrid} Default tile grid for the\n * passed projection.\n */\nexport function getForProjection(projection) {\n let tileGrid = projection.getDefaultTileGrid();\n if (!tileGrid) {\n tileGrid = createForProjection(projection);\n projection.setDefaultTileGrid(tileGrid);\n }\n return tileGrid;\n}\n\n/**\n * @param {TileGrid} tileGrid Tile grid.\n * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {import(\"./proj/Projection.js\").default} projection Projection.\n * @return {import(\"./tilecoord.js\").TileCoord} Tile coordinate.\n */\nexport function wrapX(tileGrid, tileCoord, projection) {\n const z = tileCoord[0];\n const center = tileGrid.getTileCoordCenter(tileCoord);\n const projectionExtent = extentFromProjection(projection);\n if (!containsCoordinate(projectionExtent, center)) {\n const worldWidth = getWidth(projectionExtent);\n const worldsAway = Math.ceil(\n (projectionExtent[0] - center[0]) / worldWidth\n );\n center[0] += worldWidth * worldsAway;\n return tileGrid.getTileCoordForCoordAndZ(center, z);\n }\n return tileCoord;\n}\n\n/**\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number} [maxZoom] Maximum zoom level (default is\n * DEFAULT_MAX_ZOOM).\n * @param {number|import(\"./size.js\").Size} [tileSize] Tile size (default uses\n * DEFAULT_TILE_SIZE).\n * @param {import(\"./extent.js\").Corner} [corner] Extent corner (default is `'top-left'`).\n * @return {!TileGrid} TileGrid instance.\n */\nexport function createForExtent(extent, maxZoom, tileSize, corner) {\n corner = corner !== undefined ? corner : 'top-left';\n\n const resolutions = resolutionsFromExtent(extent, maxZoom, tileSize);\n\n return new TileGrid({\n extent: extent,\n origin: getCorner(extent, corner),\n resolutions: resolutions,\n tileSize: tileSize,\n });\n}\n\n/**\n * @typedef {Object} XYZOptions\n * @property {import(\"./extent.js\").Extent} [extent] Extent for the tile grid. The origin for an XYZ tile grid is the\n * top-left corner of the extent. If `maxResolution` is not provided the zero level of the grid is defined by the resolution\n * at which one tile fits in the provided extent. If not provided, the extent of the EPSG:3857 projection is used.\n * @property {number} [maxResolution] Resolution at level zero.\n * @property {number} [maxZoom] Maximum zoom. The default is `42`. This determines the number of levels\n * in the grid set. For example, a `maxZoom` of 21 means there are 22 levels in the grid set.\n * @property {number} [minZoom=0] Minimum zoom.\n * @property {number|import(\"./size.js\").Size} [tileSize=[256, 256]] Tile size in pixels.\n */\n\n/**\n * Creates a tile grid with a standard XYZ tiling scheme.\n * @param {XYZOptions} [options] Tile grid options.\n * @return {!TileGrid} Tile grid instance.\n * @api\n */\nexport function createXYZ(options) {\n const xyzOptions = options || {};\n\n const extent = xyzOptions.extent || getProjection('EPSG:3857').getExtent();\n\n const gridOptions = {\n extent: extent,\n minZoom: xyzOptions.minZoom,\n tileSize: xyzOptions.tileSize,\n resolutions: resolutionsFromExtent(\n extent,\n xyzOptions.maxZoom,\n xyzOptions.tileSize,\n xyzOptions.maxResolution\n ),\n };\n return new TileGrid(gridOptions);\n}\n\n/**\n * Create a resolutions array from an extent. A zoom factor of 2 is assumed.\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number} [maxZoom] Maximum zoom level (default is\n * DEFAULT_MAX_ZOOM).\n * @param {number|import(\"./size.js\").Size} [tileSize] Tile size (default uses\n * DEFAULT_TILE_SIZE).\n * @param {number} [maxResolution] Resolution at level zero.\n * @return {!Array} Resolutions array.\n */\nfunction resolutionsFromExtent(extent, maxZoom, tileSize, maxResolution) {\n maxZoom = maxZoom !== undefined ? maxZoom : DEFAULT_MAX_ZOOM;\n tileSize = toSize(tileSize !== undefined ? tileSize : DEFAULT_TILE_SIZE);\n\n const height = getHeight(extent);\n const width = getWidth(extent);\n\n maxResolution =\n maxResolution > 0\n ? maxResolution\n : Math.max(width / tileSize[0], height / tileSize[1]);\n\n const length = maxZoom + 1;\n const resolutions = new Array(length);\n for (let z = 0; z < length; ++z) {\n resolutions[z] = maxResolution / Math.pow(2, z);\n }\n return resolutions;\n}\n\n/**\n * @param {import(\"./proj.js\").ProjectionLike} projection Projection.\n * @param {number} [maxZoom] Maximum zoom level (default is\n * DEFAULT_MAX_ZOOM).\n * @param {number|import(\"./size.js\").Size} [tileSize] Tile size (default uses\n * DEFAULT_TILE_SIZE).\n * @param {import(\"./extent.js\").Corner} [corner] Extent corner (default is `'top-left'`).\n * @return {!TileGrid} TileGrid instance.\n */\nexport function createForProjection(projection, maxZoom, tileSize, corner) {\n const extent = extentFromProjection(projection);\n return createForExtent(extent, maxZoom, tileSize, corner);\n}\n\n/**\n * Generate a tile grid extent from a projection. If the projection has an\n * extent, it is used. If not, a global extent is assumed.\n * @param {import(\"./proj.js\").ProjectionLike} projection Projection.\n * @return {import(\"./extent.js\").Extent} Extent.\n */\nexport function extentFromProjection(projection) {\n projection = getProjection(projection);\n let extent = projection.getExtent();\n if (!extent) {\n const half =\n (180 * METERS_PER_UNIT.degrees) / projection.getMetersPerUnit();\n extent = createOrUpdate(-half, -half, half, half);\n }\n return extent;\n}\n","/**\n * @module ol/source/Tile\n */\nimport Event from '../events/Event.js';\nimport Source from './Source.js';\nimport TileCache from '../TileCache.js';\nimport TileState from '../TileState.js';\nimport {abstract} from '../util.js';\nimport {assert} from '../asserts.js';\nimport {equivalent} from '../proj.js';\nimport {getKeyZXY, withinExtentAndZ} from '../tilecoord.js';\nimport {\n getForProjection as getTileGridForProjection,\n wrapX,\n} from '../tilegrid.js';\nimport {scale as scaleSize, toSize} from '../size.js';\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature &\n * import(\"../Observable\").OnSignature &\n * import(\"../Observable\").OnSignature &\n * import(\"../Observable\").CombinedOnSignature} TileSourceOnSignature\n */\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {number} [cacheSize] CacheSize.\n * @property {boolean} [opaque=false] Whether the layer is opaque.\n * @property {number} [tilePixelRatio] TilePixelRatio.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection.\n * @property {import(\"./Source.js\").State} [state] State.\n * @property {import(\"../tilegrid/TileGrid.js\").default} [tileGrid] TileGrid.\n * @property {boolean} [wrapX=false] WrapX.\n * @property {number} [transition] Transition.\n * @property {string} [key] Key.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0] ZDirection.\n * @property {boolean} [interpolate=false] Use interpolated values when resampling. By default,\n * the nearest neighbor is used when resampling.\n */\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for sources providing images divided into a tile grid.\n * @abstract\n * @api\n */\nclass TileSource extends Source {\n /**\n * @param {Options} options SourceTile source options.\n */\n constructor(options) {\n super({\n attributions: options.attributions,\n attributionsCollapsible: options.attributionsCollapsible,\n projection: options.projection,\n state: options.state,\n wrapX: options.wrapX,\n interpolate: options.interpolate,\n });\n\n /***\n * @type {TileSourceOnSignature}\n */\n this.on;\n\n /***\n * @type {TileSourceOnSignature}\n */\n this.once;\n\n /***\n * @type {TileSourceOnSignature}\n */\n this.un;\n\n /**\n * @private\n * @type {boolean}\n */\n this.opaque_ = options.opaque !== undefined ? options.opaque : false;\n\n /**\n * @private\n * @type {number}\n */\n this.tilePixelRatio_ =\n options.tilePixelRatio !== undefined ? options.tilePixelRatio : 1;\n\n /**\n * @type {import(\"../tilegrid/TileGrid.js\").default|null}\n */\n this.tileGrid = options.tileGrid !== undefined ? options.tileGrid : null;\n\n const tileSize = [256, 256];\n if (this.tileGrid) {\n toSize(this.tileGrid.getTileSize(this.tileGrid.getMinZoom()), tileSize);\n }\n\n /**\n * @protected\n * @type {import(\"../TileCache.js\").default}\n */\n this.tileCache = new TileCache(options.cacheSize || 0);\n\n /**\n * @protected\n * @type {import(\"../size.js\").Size}\n */\n this.tmpSize = [0, 0];\n\n /**\n * @private\n * @type {string}\n */\n this.key_ = options.key || '';\n\n /**\n * @protected\n * @type {import(\"../Tile.js\").Options}\n */\n this.tileOptions = {\n transition: options.transition,\n interpolate: options.interpolate,\n };\n\n /**\n * zDirection hint, read by the renderer. Indicates which resolution should be used\n * by a renderer if the views resolution does not match any resolution of the tile source.\n * If 0, the nearest resolution will be used. If 1, the nearest lower resolution\n * will be used. If -1, the nearest higher resolution will be used.\n * @type {number|import(\"../array.js\").NearestDirectionFunction}\n */\n this.zDirection = options.zDirection ? options.zDirection : 0;\n }\n\n /**\n * @return {boolean} Can expire cache.\n */\n canExpireCache() {\n return this.tileCache.canExpireCache();\n }\n\n /**\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @param {!Object} usedTiles Used tiles.\n */\n expireCache(projection, usedTiles) {\n const tileCache = this.getTileCacheForProjection(projection);\n if (tileCache) {\n tileCache.expireCache(usedTiles);\n }\n }\n\n /**\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @param {number} z Zoom level.\n * @param {import(\"../TileRange.js\").default} tileRange Tile range.\n * @param {function(import(\"../Tile.js\").default):(boolean|void)} callback Called with each\n * loaded tile. If the callback returns `false`, the tile will not be\n * considered loaded.\n * @return {boolean} The tile range is fully covered with loaded tiles.\n */\n forEachLoadedTile(projection, z, tileRange, callback) {\n const tileCache = this.getTileCacheForProjection(projection);\n if (!tileCache) {\n return false;\n }\n\n let covered = true;\n let tile, tileCoordKey, loaded;\n for (let x = tileRange.minX; x <= tileRange.maxX; ++x) {\n for (let y = tileRange.minY; y <= tileRange.maxY; ++y) {\n tileCoordKey = getKeyZXY(z, x, y);\n loaded = false;\n if (tileCache.containsKey(tileCoordKey)) {\n tile = /** @type {!import(\"../Tile.js\").default} */ (\n tileCache.get(tileCoordKey)\n );\n loaded = tile.getState() === TileState.LOADED;\n if (loaded) {\n loaded = callback(tile) !== false;\n }\n }\n if (!loaded) {\n covered = false;\n }\n }\n }\n return covered;\n }\n\n /**\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {number} Gutter.\n */\n getGutterForProjection(projection) {\n return 0;\n }\n\n /**\n * Return the key to be used for all tiles in the source.\n * @return {string} The key for all tiles.\n */\n getKey() {\n return this.key_;\n }\n\n /**\n * Set the value to be used as the key for all tiles in the source.\n * @param {string} key The key for tiles.\n * @protected\n */\n setKey(key) {\n if (this.key_ !== key) {\n this.key_ = key;\n this.changed();\n }\n }\n\n /**\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {boolean} Opaque.\n */\n getOpaque(projection) {\n return this.opaque_;\n }\n\n /**\n * @param {import(\"../proj/Projection\").default} [projection] Projection.\n * @return {Array|null} Resolutions.\n */\n getResolutions(projection) {\n const tileGrid = projection\n ? this.getTileGridForProjection(projection)\n : this.tileGrid;\n if (!tileGrid) {\n return null;\n }\n return tileGrid.getResolutions();\n }\n\n /**\n * @abstract\n * @param {number} z Tile coordinate z.\n * @param {number} x Tile coordinate x.\n * @param {number} y Tile coordinate y.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {!import(\"../Tile.js\").default} Tile.\n */\n getTile(z, x, y, pixelRatio, projection) {\n return abstract();\n }\n\n /**\n * Return the tile grid of the tile source.\n * @return {import(\"../tilegrid/TileGrid.js\").default|null} Tile grid.\n * @api\n */\n getTileGrid() {\n return this.tileGrid;\n }\n\n /**\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {!import(\"../tilegrid/TileGrid.js\").default} Tile grid.\n */\n getTileGridForProjection(projection) {\n if (!this.tileGrid) {\n return getTileGridForProjection(projection);\n }\n return this.tileGrid;\n }\n\n /**\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {import(\"../TileCache.js\").default} Tile cache.\n * @protected\n */\n getTileCacheForProjection(projection) {\n const sourceProjection = this.getProjection();\n assert(\n sourceProjection === null || equivalent(sourceProjection, projection),\n 68 // A VectorTile source can only be rendered if it has a projection compatible with the view projection.\n );\n return this.tileCache;\n }\n\n /**\n * Get the tile pixel ratio for this source. Subclasses may override this\n * method, which is meant to return a supported pixel ratio that matches the\n * provided `pixelRatio` as close as possible.\n * @param {number} pixelRatio Pixel ratio.\n * @return {number} Tile pixel ratio.\n */\n getTilePixelRatio(pixelRatio) {\n return this.tilePixelRatio_;\n }\n\n /**\n * @param {number} z Z.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {import(\"../size.js\").Size} Tile size.\n */\n getTilePixelSize(z, pixelRatio, projection) {\n const tileGrid = this.getTileGridForProjection(projection);\n const tilePixelRatio = this.getTilePixelRatio(pixelRatio);\n const tileSize = toSize(tileGrid.getTileSize(z), this.tmpSize);\n if (tilePixelRatio == 1) {\n return tileSize;\n }\n return scaleSize(tileSize, tilePixelRatio, this.tmpSize);\n }\n\n /**\n * Returns a tile coordinate wrapped around the x-axis. When the tile coordinate\n * is outside the resolution and extent range of the tile grid, `null` will be\n * returned.\n * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {import(\"../proj/Projection.js\").default} [projection] Projection.\n * @return {import(\"../tilecoord.js\").TileCoord} Tile coordinate to be passed to the tileUrlFunction or\n * null if no tile URL should be created for the passed `tileCoord`.\n */\n getTileCoordForTileUrlFunction(tileCoord, projection) {\n projection = projection !== undefined ? projection : this.getProjection();\n const tileGrid = this.getTileGridForProjection(projection);\n if (this.getWrapX() && projection.isGlobal()) {\n tileCoord = wrapX(tileGrid, tileCoord, projection);\n }\n return withinExtentAndZ(tileCoord, tileGrid) ? tileCoord : null;\n }\n\n /**\n * Remove all cached tiles from the source. The next render cycle will fetch new tiles.\n * @api\n */\n clear() {\n this.tileCache.clear();\n }\n\n refresh() {\n this.clear();\n super.refresh();\n }\n\n /**\n * Increases the cache size if needed\n * @param {number} tileCount Minimum number of tiles needed.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n */\n updateCacheSize(tileCount, projection) {\n const tileCache = this.getTileCacheForProjection(projection);\n if (tileCount > tileCache.highWaterMark) {\n tileCache.highWaterMark = tileCount;\n }\n }\n\n /**\n * Marks a tile coord as being used, without triggering a load.\n * @abstract\n * @param {number} z Tile coordinate z.\n * @param {number} x Tile coordinate x.\n * @param {number} y Tile coordinate y.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n */\n useTile(z, x, y, projection) {}\n}\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/source/Tile~TileSource} instances are instances of this\n * type.\n */\nexport class TileSourceEvent extends Event {\n /**\n * @param {string} type Type.\n * @param {import(\"../Tile.js\").default} tile The tile.\n */\n constructor(type, tile) {\n super(type);\n\n /**\n * The tile related to the event.\n * @type {import(\"../Tile.js\").default}\n * @api\n */\n this.tile = tile;\n }\n}\n\nexport default TileSource;\n","/**\n * @module ol/tileurlfunction\n */\nimport {assert} from './asserts.js';\nimport {modulo} from './math.js';\nimport {hash as tileCoordHash} from './tilecoord.js';\n\n/**\n * @param {string} template Template.\n * @param {import(\"./tilegrid/TileGrid.js\").default} tileGrid Tile grid.\n * @return {import(\"./Tile.js\").UrlFunction} Tile URL function.\n */\nexport function createFromTemplate(template, tileGrid) {\n const zRegEx = /\\{z\\}/g;\n const xRegEx = /\\{x\\}/g;\n const yRegEx = /\\{y\\}/g;\n const dashYRegEx = /\\{-y\\}/g;\n return (\n /**\n * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile Coordinate.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"./proj/Projection.js\").default} projection Projection.\n * @return {string|undefined} Tile URL.\n */\n function (tileCoord, pixelRatio, projection) {\n if (!tileCoord) {\n return undefined;\n }\n return template\n .replace(zRegEx, tileCoord[0].toString())\n .replace(xRegEx, tileCoord[1].toString())\n .replace(yRegEx, tileCoord[2].toString())\n .replace(dashYRegEx, function () {\n const z = tileCoord[0];\n const range = tileGrid.getFullTileRange(z);\n assert(range, 55); // The {-y} placeholder requires a tile grid with extent\n const y = range.getHeight() - tileCoord[2] - 1;\n return y.toString();\n });\n }\n );\n}\n\n/**\n * @param {Array} templates Templates.\n * @param {import(\"./tilegrid/TileGrid.js\").default} tileGrid Tile grid.\n * @return {import(\"./Tile.js\").UrlFunction} Tile URL function.\n */\nexport function createFromTemplates(templates, tileGrid) {\n const len = templates.length;\n const tileUrlFunctions = new Array(len);\n for (let i = 0; i < len; ++i) {\n tileUrlFunctions[i] = createFromTemplate(templates[i], tileGrid);\n }\n return createFromTileUrlFunctions(tileUrlFunctions);\n}\n\n/**\n * @param {Array} tileUrlFunctions Tile URL Functions.\n * @return {import(\"./Tile.js\").UrlFunction} Tile URL function.\n */\nexport function createFromTileUrlFunctions(tileUrlFunctions) {\n if (tileUrlFunctions.length === 1) {\n return tileUrlFunctions[0];\n }\n return (\n /**\n * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile Coordinate.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"./proj/Projection.js\").default} projection Projection.\n * @return {string|undefined} Tile URL.\n */\n function (tileCoord, pixelRatio, projection) {\n if (!tileCoord) {\n return undefined;\n }\n const h = tileCoordHash(tileCoord);\n const index = modulo(h, tileUrlFunctions.length);\n return tileUrlFunctions[index](tileCoord, pixelRatio, projection);\n }\n );\n}\n\n/**\n * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"./proj/Projection.js\").default} projection Projection.\n * @return {string|undefined} Tile URL.\n */\nexport function nullTileUrlFunction(tileCoord, pixelRatio, projection) {\n return undefined;\n}\n\n/**\n * @param {string} url URL.\n * @return {Array} Array of urls.\n */\nexport function expandUrl(url) {\n const urls = [];\n let match = /\\{([a-z])-([a-z])\\}/.exec(url);\n if (match) {\n // char range\n const startCharCode = match[1].charCodeAt(0);\n const stopCharCode = match[2].charCodeAt(0);\n let charCode;\n for (charCode = startCharCode; charCode <= stopCharCode; ++charCode) {\n urls.push(url.replace(match[0], String.fromCharCode(charCode)));\n }\n return urls;\n }\n match = /\\{(\\d+)-(\\d+)\\}/.exec(url);\n if (match) {\n // number range\n const stop = parseInt(match[2], 10);\n for (let i = parseInt(match[1], 10); i <= stop; i++) {\n urls.push(url.replace(match[0], i.toString()));\n }\n return urls;\n }\n urls.push(url);\n return urls;\n}\n","/**\n * @module ol/source/UrlTile\n */\nimport TileEventType from './TileEventType.js';\nimport TileSource, {TileSourceEvent} from './Tile.js';\nimport TileState from '../TileState.js';\nimport {createFromTemplates, expandUrl} from '../tileurlfunction.js';\nimport {getKeyZXY} from '../tilecoord.js';\nimport {getUid} from '../util.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {number} [cacheSize] Cache size.\n * @property {boolean} [opaque=false] Whether the layer is opaque.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection.\n * @property {import(\"./Source.js\").State} [state] State.\n * @property {import(\"../tilegrid/TileGrid.js\").default} [tileGrid] TileGrid.\n * @property {import(\"../Tile.js\").LoadFunction} tileLoadFunction TileLoadFunction.\n * @property {number} [tilePixelRatio] TilePixelRatio.\n * @property {import(\"../Tile.js\").UrlFunction} [tileUrlFunction] TileUrlFunction.\n * @property {string} [url] Url.\n * @property {Array} [urls] Urls.\n * @property {boolean} [wrapX=true] WrapX.\n * @property {number} [transition] Transition.\n * @property {string} [key] Key.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0] ZDirection.\n * @property {boolean} [interpolate=false] Use interpolated values when resampling. By default,\n * the nearest neighbor is used when resampling.\n */\n\n/**\n * @classdesc\n * Base class for sources providing tiles divided into a tile grid over http.\n *\n * @fires import(\"./Tile.js\").TileSourceEvent\n */\nclass UrlTile extends TileSource {\n /**\n * @param {Options} options Image tile options.\n */\n constructor(options) {\n super({\n attributions: options.attributions,\n cacheSize: options.cacheSize,\n opaque: options.opaque,\n projection: options.projection,\n state: options.state,\n tileGrid: options.tileGrid,\n tilePixelRatio: options.tilePixelRatio,\n wrapX: options.wrapX,\n transition: options.transition,\n interpolate: options.interpolate,\n key: options.key,\n attributionsCollapsible: options.attributionsCollapsible,\n zDirection: options.zDirection,\n });\n\n /**\n * @private\n * @type {boolean}\n */\n this.generateTileUrlFunction_ =\n this.tileUrlFunction === UrlTile.prototype.tileUrlFunction;\n\n /**\n * @protected\n * @type {import(\"../Tile.js\").LoadFunction}\n */\n this.tileLoadFunction = options.tileLoadFunction;\n\n if (options.tileUrlFunction) {\n this.tileUrlFunction = options.tileUrlFunction;\n }\n\n /**\n * @protected\n * @type {!Array|null}\n */\n this.urls = null;\n\n if (options.urls) {\n this.setUrls(options.urls);\n } else if (options.url) {\n this.setUrl(options.url);\n }\n\n /**\n * @private\n * @type {!Object}\n */\n this.tileLoadingKeys_ = {};\n }\n\n /**\n * Return the tile load function of the source.\n * @return {import(\"../Tile.js\").LoadFunction} TileLoadFunction\n * @api\n */\n getTileLoadFunction() {\n return this.tileLoadFunction;\n }\n\n /**\n * Return the tile URL function of the source.\n * @return {import(\"../Tile.js\").UrlFunction} TileUrlFunction\n * @api\n */\n getTileUrlFunction() {\n return Object.getPrototypeOf(this).tileUrlFunction === this.tileUrlFunction\n ? this.tileUrlFunction.bind(this)\n : this.tileUrlFunction;\n }\n\n /**\n * Return the URLs used for this source.\n * When a tileUrlFunction is used instead of url or urls,\n * null will be returned.\n * @return {!Array|null} URLs.\n * @api\n */\n getUrls() {\n return this.urls;\n }\n\n /**\n * Handle tile change events.\n * @param {import(\"../events/Event.js\").default} event Event.\n * @protected\n */\n handleTileChange(event) {\n const tile = /** @type {import(\"../Tile.js\").default} */ (event.target);\n const uid = getUid(tile);\n const tileState = tile.getState();\n let type;\n if (tileState == TileState.LOADING) {\n this.tileLoadingKeys_[uid] = true;\n type = TileEventType.TILELOADSTART;\n } else if (uid in this.tileLoadingKeys_) {\n delete this.tileLoadingKeys_[uid];\n type =\n tileState == TileState.ERROR\n ? TileEventType.TILELOADERROR\n : tileState == TileState.LOADED\n ? TileEventType.TILELOADEND\n : undefined;\n }\n if (type != undefined) {\n this.dispatchEvent(new TileSourceEvent(type, tile));\n }\n }\n\n /**\n * Set the tile load function of the source.\n * @param {import(\"../Tile.js\").LoadFunction} tileLoadFunction Tile load function.\n * @api\n */\n setTileLoadFunction(tileLoadFunction) {\n this.tileCache.clear();\n this.tileLoadFunction = tileLoadFunction;\n this.changed();\n }\n\n /**\n * Set the tile URL function of the source.\n * @param {import(\"../Tile.js\").UrlFunction} tileUrlFunction Tile URL function.\n * @param {string} [key] Optional new tile key for the source.\n * @api\n */\n setTileUrlFunction(tileUrlFunction, key) {\n this.tileUrlFunction = tileUrlFunction;\n this.tileCache.pruneExceptNewestZ();\n if (typeof key !== 'undefined') {\n this.setKey(key);\n } else {\n this.changed();\n }\n }\n\n /**\n * Set the URL to use for requests.\n * @param {string} url URL.\n * @api\n */\n setUrl(url) {\n const urls = expandUrl(url);\n this.urls = urls;\n this.setUrls(urls);\n }\n\n /**\n * Set the URLs to use for requests.\n * @param {Array} urls URLs.\n * @api\n */\n setUrls(urls) {\n this.urls = urls;\n const key = urls.join('\\n');\n if (this.generateTileUrlFunction_) {\n this.setTileUrlFunction(createFromTemplates(urls, this.tileGrid), key);\n } else {\n this.setKey(key);\n }\n }\n\n /**\n * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {string|undefined} Tile URL.\n */\n tileUrlFunction(tileCoord, pixelRatio, projection) {\n return undefined;\n }\n\n /**\n * Marks a tile coord as being used, without triggering a load.\n * @param {number} z Tile coordinate z.\n * @param {number} x Tile coordinate x.\n * @param {number} y Tile coordinate y.\n */\n useTile(z, x, y) {\n const tileCoordKey = getKeyZXY(z, x, y);\n if (this.tileCache.containsKey(tileCoordKey)) {\n this.tileCache.get(tileCoordKey);\n }\n }\n}\n\nexport default UrlTile;\n","/**\n * @module ol/source/TileImage\n */\nimport EventType from '../events/EventType.js';\nimport ImageTile from '../ImageTile.js';\nimport ReprojTile from '../reproj/Tile.js';\nimport TileCache from '../TileCache.js';\nimport TileState from '../TileState.js';\nimport UrlTile from './UrlTile.js';\nimport {equivalent, get as getProjection} from '../proj.js';\nimport {getKey, getKeyZXY} from '../tilecoord.js';\nimport {getForProjection as getTileGridForProjection} from '../tilegrid.js';\nimport {getUid} from '../util.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {number} [cacheSize] Initial tile cache size. Will auto-grow to hold at least the number of tiles in the viewport.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images. Note that\n * you must provide a `crossOrigin` value if you want to access pixel data with the Canvas renderer.\n * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling. By default,\n * linear interpolation is used when resampling. Set to false to use the nearest neighbor instead.\n * @property {boolean} [opaque=false] Whether the layer is opaque.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection. Default is the view projection.\n * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {import(\"./Source.js\").State} [state] Source state.\n * @property {typeof import(\"../ImageTile.js\").default} [tileClass] Class used to instantiate image tiles.\n * Default is {@link module:ol/ImageTile~ImageTile}.\n * @property {import(\"../tilegrid/TileGrid.js\").default} [tileGrid] Tile grid.\n * @property {import(\"../Tile.js\").LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL. The default is\n * ```js\n * function(imageTile, src) {\n * imageTile.getImage().src = src;\n * };\n * ```\n * @property {number} [tilePixelRatio=1] The pixel ratio used by the tile service. For example, if the tile\n * service advertizes 256px by 256px tiles but actually sends 512px\n * by 512px images (for retina/hidpi devices) then `tilePixelRatio`\n * should be set to `2`.\n * @property {import(\"../Tile.js\").UrlFunction} [tileUrlFunction] Optional function to get tile URL given a tile coordinate and the projection.\n * @property {string} [url] URL template. Must include `{x}`, `{y}` or `{-y}`, and `{z}` placeholders.\n * A `{?-?}` template pattern, for example `subdomain{a-f}.domain.com`, may be\n * used instead of defining each one separately in the `urls` option.\n * @property {Array} [urls] An array of URL templates.\n * @property {boolean} [wrapX] Whether to wrap the world horizontally. The default, is to\n * request out-of-bounds tiles from the server. When set to `false`, only one\n * world will be rendered. When set to `true`, tiles will be requested for one\n * world only, but they will be wrapped horizontally to render multiple worlds.\n * @property {number} [transition] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n * @property {string} [key] Optional tile key for proper cache fetching\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0]\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n */\n\n/**\n * @classdesc\n * Base class for sources providing images divided into a tile grid.\n *\n * @fires import(\"./Tile.js\").TileSourceEvent\n * @api\n */\nclass TileImage extends UrlTile {\n /**\n * @param {!Options} options Image tile options.\n */\n constructor(options) {\n super({\n attributions: options.attributions,\n cacheSize: options.cacheSize,\n opaque: options.opaque,\n projection: options.projection,\n state: options.state,\n tileGrid: options.tileGrid,\n tileLoadFunction: options.tileLoadFunction\n ? options.tileLoadFunction\n : defaultTileLoadFunction,\n tilePixelRatio: options.tilePixelRatio,\n tileUrlFunction: options.tileUrlFunction,\n url: options.url,\n urls: options.urls,\n wrapX: options.wrapX,\n transition: options.transition,\n interpolate:\n options.interpolate !== undefined ? options.interpolate : true,\n key: options.key,\n attributionsCollapsible: options.attributionsCollapsible,\n zDirection: options.zDirection,\n });\n\n /**\n * @protected\n * @type {?string}\n */\n this.crossOrigin =\n options.crossOrigin !== undefined ? options.crossOrigin : null;\n\n /**\n * @protected\n * @type {typeof ImageTile}\n */\n this.tileClass =\n options.tileClass !== undefined ? options.tileClass : ImageTile;\n\n /**\n * @protected\n * @type {!Object}\n */\n this.tileCacheForProjection = {};\n\n /**\n * @protected\n * @type {!Object}\n */\n this.tileGridForProjection = {};\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.reprojectionErrorThreshold_ = options.reprojectionErrorThreshold;\n\n /**\n * @private\n * @type {boolean}\n */\n this.renderReprojectionEdges_ = false;\n }\n\n /**\n * @return {boolean} Can expire cache.\n */\n canExpireCache() {\n if (this.tileCache.canExpireCache()) {\n return true;\n }\n for (const key in this.tileCacheForProjection) {\n if (this.tileCacheForProjection[key].canExpireCache()) {\n return true;\n }\n }\n\n return false;\n }\n\n /**\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @param {!Object} usedTiles Used tiles.\n */\n expireCache(projection, usedTiles) {\n const usedTileCache = this.getTileCacheForProjection(projection);\n\n this.tileCache.expireCache(\n this.tileCache == usedTileCache ? usedTiles : {}\n );\n for (const id in this.tileCacheForProjection) {\n const tileCache = this.tileCacheForProjection[id];\n tileCache.expireCache(tileCache == usedTileCache ? usedTiles : {});\n }\n }\n\n /**\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {number} Gutter.\n */\n getGutterForProjection(projection) {\n if (\n this.getProjection() &&\n projection &&\n !equivalent(this.getProjection(), projection)\n ) {\n return 0;\n }\n return this.getGutter();\n }\n\n /**\n * @return {number} Gutter.\n */\n getGutter() {\n return 0;\n }\n\n /**\n * Return the key to be used for all tiles in the source.\n * @return {string} The key for all tiles.\n */\n getKey() {\n let key = super.getKey();\n if (!this.getInterpolate()) {\n key += ':disable-interpolation';\n }\n return key;\n }\n\n /**\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {boolean} Opaque.\n */\n getOpaque(projection) {\n if (\n this.getProjection() &&\n projection &&\n !equivalent(this.getProjection(), projection)\n ) {\n return false;\n }\n return super.getOpaque(projection);\n }\n\n /**\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {!import(\"../tilegrid/TileGrid.js\").default} Tile grid.\n */\n getTileGridForProjection(projection) {\n const thisProj = this.getProjection();\n if (this.tileGrid && (!thisProj || equivalent(thisProj, projection))) {\n return this.tileGrid;\n }\n const projKey = getUid(projection);\n if (!(projKey in this.tileGridForProjection)) {\n this.tileGridForProjection[projKey] =\n getTileGridForProjection(projection);\n }\n return this.tileGridForProjection[projKey];\n }\n\n /**\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {import(\"../TileCache.js\").default} Tile cache.\n */\n getTileCacheForProjection(projection) {\n const thisProj = this.getProjection();\n if (!thisProj || equivalent(thisProj, projection)) {\n return this.tileCache;\n }\n const projKey = getUid(projection);\n if (!(projKey in this.tileCacheForProjection)) {\n this.tileCacheForProjection[projKey] = new TileCache(\n this.tileCache.highWaterMark\n );\n }\n return this.tileCacheForProjection[projKey];\n }\n\n /**\n * @param {number} z Tile coordinate z.\n * @param {number} x Tile coordinate x.\n * @param {number} y Tile coordinate y.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @param {string} key The key set on the tile.\n * @return {!ImageTile} Tile.\n * @private\n */\n createTile_(z, x, y, pixelRatio, projection, key) {\n const tileCoord = [z, x, y];\n const urlTileCoord = this.getTileCoordForTileUrlFunction(\n tileCoord,\n projection\n );\n const tileUrl = urlTileCoord\n ? this.tileUrlFunction(urlTileCoord, pixelRatio, projection)\n : undefined;\n const tile = new this.tileClass(\n tileCoord,\n tileUrl !== undefined ? TileState.IDLE : TileState.EMPTY,\n tileUrl !== undefined ? tileUrl : '',\n this.crossOrigin,\n this.tileLoadFunction,\n this.tileOptions\n );\n tile.key = key;\n tile.addEventListener(EventType.CHANGE, this.handleTileChange.bind(this));\n return tile;\n }\n\n /**\n * @param {number} z Tile coordinate z.\n * @param {number} x Tile coordinate x.\n * @param {number} y Tile coordinate y.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {!(ImageTile|ReprojTile)} Tile.\n */\n getTile(z, x, y, pixelRatio, projection) {\n const sourceProjection = this.getProjection();\n if (\n !sourceProjection ||\n !projection ||\n equivalent(sourceProjection, projection)\n ) {\n return this.getTileInternal(\n z,\n x,\n y,\n pixelRatio,\n sourceProjection || projection\n );\n }\n const cache = this.getTileCacheForProjection(projection);\n const tileCoord = [z, x, y];\n let tile;\n const tileCoordKey = getKey(tileCoord);\n if (cache.containsKey(tileCoordKey)) {\n tile = cache.get(tileCoordKey);\n }\n const key = this.getKey();\n if (tile && tile.key == key) {\n return tile;\n }\n const sourceTileGrid = this.getTileGridForProjection(sourceProjection);\n const targetTileGrid = this.getTileGridForProjection(projection);\n const wrappedTileCoord = this.getTileCoordForTileUrlFunction(\n tileCoord,\n projection\n );\n const newTile = new ReprojTile(\n sourceProjection,\n sourceTileGrid,\n projection,\n targetTileGrid,\n tileCoord,\n wrappedTileCoord,\n this.getTilePixelRatio(pixelRatio),\n this.getGutter(),\n (z, x, y, pixelRatio) =>\n this.getTileInternal(z, x, y, pixelRatio, sourceProjection),\n this.reprojectionErrorThreshold_,\n this.renderReprojectionEdges_,\n this.getInterpolate()\n );\n newTile.key = key;\n\n if (tile) {\n newTile.interimTile = tile;\n newTile.refreshInterimChain();\n cache.replace(tileCoordKey, newTile);\n } else {\n cache.set(tileCoordKey, newTile);\n }\n return newTile;\n }\n\n /**\n * @param {number} z Tile coordinate z.\n * @param {number} x Tile coordinate x.\n * @param {number} y Tile coordinate y.\n * @param {number} pixelRatio Pixel ratio.\n * @param {!import(\"../proj/Projection.js\").default} projection Projection.\n * @return {!ImageTile} Tile.\n * @protected\n */\n getTileInternal(z, x, y, pixelRatio, projection) {\n let tile = null;\n const tileCoordKey = getKeyZXY(z, x, y);\n const key = this.getKey();\n if (!this.tileCache.containsKey(tileCoordKey)) {\n tile = this.createTile_(z, x, y, pixelRatio, projection, key);\n this.tileCache.set(tileCoordKey, tile);\n } else {\n tile = this.tileCache.get(tileCoordKey);\n if (tile.key != key) {\n // The source's params changed. If the tile has an interim tile and if we\n // can use it then we use it. Otherwise we create a new tile. In both\n // cases we attempt to assign an interim tile to the new tile.\n const interimTile = tile;\n tile = this.createTile_(z, x, y, pixelRatio, projection, key);\n\n //make the new tile the head of the list,\n if (interimTile.getState() == TileState.IDLE) {\n //the old tile hasn't begun loading yet, and is now outdated, so we can simply discard it\n tile.interimTile = interimTile.interimTile;\n } else {\n tile.interimTile = interimTile;\n }\n tile.refreshInterimChain();\n this.tileCache.replace(tileCoordKey, tile);\n }\n }\n return tile;\n }\n\n /**\n * Sets whether to render reprojection edges or not (usually for debugging).\n * @param {boolean} render Render the edges.\n * @api\n */\n setRenderReprojectionEdges(render) {\n if (this.renderReprojectionEdges_ == render) {\n return;\n }\n this.renderReprojectionEdges_ = render;\n for (const id in this.tileCacheForProjection) {\n this.tileCacheForProjection[id].clear();\n }\n this.changed();\n }\n\n /**\n * Sets the tile grid to use when reprojecting the tiles to the given\n * projection instead of the default tile grid for the projection.\n *\n * This can be useful when the default tile grid cannot be created\n * (e.g. projection has no extent defined) or\n * for optimization reasons (custom tile size, resolutions, ...).\n *\n * @param {import(\"../proj.js\").ProjectionLike} projection Projection.\n * @param {import(\"../tilegrid/TileGrid.js\").default} tilegrid Tile grid to use for the projection.\n * @api\n */\n setTileGridForProjection(projection, tilegrid) {\n const proj = getProjection(projection);\n if (proj) {\n const projKey = getUid(proj);\n if (!(projKey in this.tileGridForProjection)) {\n this.tileGridForProjection[projKey] = tilegrid;\n }\n }\n }\n\n clear() {\n super.clear();\n for (const id in this.tileCacheForProjection) {\n this.tileCacheForProjection[id].clear();\n }\n }\n}\n\n/**\n * @param {ImageTile} imageTile Image tile.\n * @param {string} src Source.\n */\nfunction defaultTileLoadFunction(imageTile, src) {\n /** @type {HTMLImageElement|HTMLVideoElement} */ (imageTile.getImage()).src =\n src;\n}\n\nexport default TileImage;\n","/**\n * @module ol/source/BingMaps\n */\n\nimport TileImage from './TileImage.js';\nimport {applyTransform, intersects} from '../extent.js';\nimport {createFromTileUrlFunctions} from '../tileurlfunction.js';\nimport {createOrUpdate} from '../tilecoord.js';\nimport {createXYZ, extentFromProjection} from '../tilegrid.js';\nimport {get as getProjection, getTransformFromProjections} from '../proj.js';\nimport {jsonp as requestJSONP} from '../net.js';\n\n/**\n * @param {import('../tilecoord.js').TileCoord} tileCoord Tile coord.\n * @return {string} Quad key.\n */\nexport function quadKey(tileCoord) {\n const z = tileCoord[0];\n const digits = new Array(z);\n let mask = 1 << (z - 1);\n let i, charCode;\n for (i = 0; i < z; ++i) {\n // 48 is charCode for 0 - '0'.charCodeAt(0)\n charCode = 48;\n if (tileCoord[1] & mask) {\n charCode += 1;\n }\n if (tileCoord[2] & mask) {\n charCode += 2;\n }\n digits[i] = String.fromCharCode(charCode);\n mask >>= 1;\n }\n return digits.join('');\n}\n\n/**\n * The attribution containing a link to the Microsoft® Bingâ„¢ Maps Platform APIs’\n * Terms Of Use.\n * @const\n * @type {string}\n */\nconst TOS_ATTRIBUTION =\n '' +\n 'Terms of Use';\n\n/**\n * @typedef {Object} Options\n * @property {number} [cacheSize] Initial tile cache size. Will auto-grow to hold at least the number of tiles in the viewport.\n * @property {boolean} [hidpi=false] If `true` hidpi tiles will be requested.\n * @property {string} [culture='en-us'] Culture code.\n * @property {string} key Bing Maps API key. Get yours at https://www.bingmapsportal.com/.\n * @property {string} imagerySet Type of imagery.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling. By default,\n * linear interpolation is used when resampling. Set to false to use the nearest neighbor instead.\n * @property {number} [maxZoom=21] Max zoom. Default is what's advertized by the BingMaps service.\n * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {import(\"../Tile.js\").LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL. The default is\n * ```js\n * function(imageTile, src) {\n * imageTile.getImage().src = src;\n * };\n * ```\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * @property {number} [transition] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0]\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n */\n\n/**\n * @typedef {Object} BingMapsImageryMetadataResponse\n * @property {number} statusCode The response status code\n * @property {string} statusDescription The response status description\n * @property {string} authenticationResultCode The authentication result code\n * @property {Array} resourceSets The array of resource sets\n */\n\n/**\n * @typedef {Object} ResourceSet\n * @property {Array} resources Resources.\n */\n\n/**\n * @typedef {Object} Resource\n * @property {number} imageHeight The image height\n * @property {number} imageWidth The image width\n * @property {number} zoomMin The minimum zoom level\n * @property {number} zoomMax The maximum zoom level\n * @property {string} imageUrl The image URL\n * @property {Array} imageUrlSubdomains The image URL subdomains for rotation\n * @property {Array} [imageryProviders] The array of ImageryProviders\n */\n\n/**\n * @typedef {Object} ImageryProvider\n * @property {Array} coverageAreas The coverage areas\n * @property {string} [attribution] The attribution\n */\n\n/**\n * @typedef {Object} CoverageArea\n * @property {number} zoomMin The minimum zoom\n * @property {number} zoomMax The maximum zoom\n * @property {Array} bbox The coverage bounding box\n */\n\n/**\n * @classdesc\n * Layer source for Bing Maps tile data.\n * @api\n */\nclass BingMaps extends TileImage {\n /**\n * @param {Options} options Bing Maps options.\n */\n constructor(options) {\n const hidpi = options.hidpi !== undefined ? options.hidpi : false;\n\n super({\n cacheSize: options.cacheSize,\n crossOrigin: 'anonymous',\n interpolate: options.interpolate,\n opaque: true,\n projection: getProjection('EPSG:3857'),\n reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n state: 'loading',\n tileLoadFunction: options.tileLoadFunction,\n tilePixelRatio: hidpi ? 2 : 1,\n wrapX: options.wrapX !== undefined ? options.wrapX : true,\n transition: options.transition,\n zDirection: options.zDirection,\n });\n\n /**\n * @private\n * @type {boolean}\n */\n this.hidpi_ = hidpi;\n\n /**\n * @private\n * @type {string}\n */\n this.culture_ = options.culture !== undefined ? options.culture : 'en-us';\n\n /**\n * @private\n * @type {number}\n */\n this.maxZoom_ = options.maxZoom !== undefined ? options.maxZoom : -1;\n\n /**\n * @private\n * @type {string}\n */\n this.apiKey_ = options.key;\n\n /**\n * @private\n * @type {string}\n */\n this.imagerySet_ = options.imagerySet;\n\n const url =\n 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/' +\n this.imagerySet_ +\n '?uriScheme=https&include=ImageryProviders&key=' +\n this.apiKey_ +\n '&c=' +\n this.culture_;\n\n requestJSONP(\n url,\n this.handleImageryMetadataResponse.bind(this),\n undefined,\n 'jsonp'\n );\n }\n\n /**\n * Get the api key used for this source.\n *\n * @return {string} The api key.\n * @api\n */\n getApiKey() {\n return this.apiKey_;\n }\n\n /**\n * Get the imagery set associated with this source.\n *\n * @return {string} The imagery set.\n * @api\n */\n getImagerySet() {\n return this.imagerySet_;\n }\n\n /**\n * @param {BingMapsImageryMetadataResponse} response Response.\n */\n handleImageryMetadataResponse(response) {\n if (\n response.statusCode != 200 ||\n response.statusDescription != 'OK' ||\n response.authenticationResultCode != 'ValidCredentials' ||\n response.resourceSets.length != 1 ||\n response.resourceSets[0].resources.length != 1\n ) {\n this.setState('error');\n return;\n }\n\n const resource = response.resourceSets[0].resources[0];\n const maxZoom = this.maxZoom_ == -1 ? resource.zoomMax : this.maxZoom_;\n\n const sourceProjection = this.getProjection();\n const extent = extentFromProjection(sourceProjection);\n const scale = this.hidpi_ ? 2 : 1;\n const tileSize =\n resource.imageWidth == resource.imageHeight\n ? resource.imageWidth / scale\n : [resource.imageWidth / scale, resource.imageHeight / scale];\n\n const tileGrid = createXYZ({\n extent: extent,\n minZoom: resource.zoomMin,\n maxZoom: maxZoom,\n tileSize: tileSize,\n });\n this.tileGrid = tileGrid;\n\n const culture = this.culture_;\n const hidpi = this.hidpi_;\n this.tileUrlFunction = createFromTileUrlFunctions(\n resource.imageUrlSubdomains.map(function (subdomain) {\n /** @type {import('../tilecoord.js').TileCoord} */\n const quadKeyTileCoord = [0, 0, 0];\n const imageUrl = resource.imageUrl\n .replace('{subdomain}', subdomain)\n .replace('{culture}', culture);\n return (\n /**\n * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {string|undefined} Tile URL.\n */\n function (tileCoord, pixelRatio, projection) {\n if (!tileCoord) {\n return undefined;\n }\n createOrUpdate(\n tileCoord[0],\n tileCoord[1],\n tileCoord[2],\n quadKeyTileCoord\n );\n let url = imageUrl;\n if (hidpi) {\n url += '&dpi=d1&device=mobile';\n }\n return url.replace('{quadkey}', quadKey(quadKeyTileCoord));\n }\n );\n })\n );\n\n if (resource.imageryProviders) {\n const transform = getTransformFromProjections(\n getProjection('EPSG:4326'),\n this.getProjection()\n );\n\n this.setAttributions((frameState) => {\n const attributions = [];\n const viewState = frameState.viewState;\n const tileGrid = this.getTileGrid();\n const z = tileGrid.getZForResolution(\n viewState.resolution,\n this.zDirection\n );\n const tileCoord = tileGrid.getTileCoordForCoordAndZ(\n viewState.center,\n z\n );\n const zoom = tileCoord[0];\n resource.imageryProviders.map(function (imageryProvider) {\n let intersecting = false;\n const coverageAreas = imageryProvider.coverageAreas;\n for (let i = 0, ii = coverageAreas.length; i < ii; ++i) {\n const coverageArea = coverageAreas[i];\n if (zoom >= coverageArea.zoomMin && zoom <= coverageArea.zoomMax) {\n const bbox = coverageArea.bbox;\n const epsg4326Extent = [bbox[1], bbox[0], bbox[3], bbox[2]];\n const extent = applyTransform(epsg4326Extent, transform);\n if (intersects(extent, frameState.extent)) {\n intersecting = true;\n break;\n }\n }\n }\n if (intersecting) {\n attributions.push(imageryProvider.attribution);\n }\n });\n\n attributions.push(TOS_ATTRIBUTION);\n return attributions;\n });\n }\n\n this.setState('ready');\n }\n}\n\nexport default BingMaps;\n","/**\n * @module ol/source/XYZ\n */\n\nimport TileImage from './TileImage.js';\nimport {createXYZ, extentFromProjection} from '../tilegrid.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {number} [cacheSize] Initial tile cache size. Will auto-grow to hold at least the number of tiles in the viewport.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images. Note that\n * you must provide a `crossOrigin` value if you want to access pixel data with the Canvas renderer.\n * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling. By default,\n * linear interpolation is used when resampling. Set to false to use the nearest neighbor instead.\n * @property {boolean} [opaque=false] Whether the layer is opaque.\n * @property {import(\"../proj.js\").ProjectionLike} [projection='EPSG:3857'] Projection.\n * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {number} [maxZoom=42] Optional max zoom level. Not used if `tileGrid` is provided.\n * @property {number} [minZoom=0] Optional min zoom level. Not used if `tileGrid` is provided.\n * @property {number} [maxResolution] Optional tile grid resolution at level zero. Not used if `tileGrid` is provided.\n * @property {import(\"../tilegrid/TileGrid.js\").default} [tileGrid] Tile grid.\n * @property {import(\"../Tile.js\").LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL. The default is\n * ```js\n * function(imageTile, src) {\n * imageTile.getImage().src = src;\n * };\n * ```\n * @property {number} [tilePixelRatio=1] The pixel ratio used by the tile service.\n * For example, if the tile service advertizes 256px by 256px tiles but actually sends 512px\n * by 512px images (for retina/hidpi devices) then `tilePixelRatio`\n * should be set to `2`.\n * @property {number|import(\"../size.js\").Size} [tileSize=[256, 256]] The tile size used by the tile service.\n * Not used if `tileGrid` is provided.\n * @property {number} [gutter=0] The size in pixels of the gutter around image tiles to ignore.\n * This allows artifacts of rendering at tile edges to be ignored.\n * Supported images should be wider and taller than the tile size by a value of `2 x gutter`.\n * @property {import(\"../Tile.js\").UrlFunction} [tileUrlFunction] Optional function to get\n * tile URL given a tile coordinate and the projection.\n * Required if `url` or `urls` are not provided.\n * @property {string} [url] URL template. Must include `{x}`, `{y}` or `{-y}`,\n * and `{z}` placeholders. A `{?-?}` template pattern, for example `subdomain{a-f}.domain.com`,\n * may be used instead of defining each one separately in the `urls` option.\n * @property {Array} [urls] An array of URL templates.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * @property {number} [transition=250] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0]\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n */\n\n/**\n * @classdesc\n * Layer source for tile data with URLs in a set XYZ format that are\n * defined in a URL template. By default, this follows the widely-used\n * Google grid where `x` 0 and `y` 0 are in the top left. Grids like\n * TMS where `x` 0 and `y` 0 are in the bottom left can be used by\n * using the `{-y}` placeholder in the URL template, so long as the\n * source does not have a custom tile grid. In this case\n * a `tileUrlFunction` can be used, such as:\n * ```js\n * tileUrlFunction: function(coordinate) {\n * return 'http://mapserver.com/' + coordinate[0] + '/' +\n * coordinate[1] + '/' + (-coordinate[2] - 1) + '.png';\n * }\n * ```\n * @api\n */\nclass XYZ extends TileImage {\n /**\n * @param {Options} [options] XYZ options.\n */\n constructor(options) {\n options = options || {};\n\n const projection =\n options.projection !== undefined ? options.projection : 'EPSG:3857';\n\n const tileGrid =\n options.tileGrid !== undefined\n ? options.tileGrid\n : createXYZ({\n extent: extentFromProjection(projection),\n maxResolution: options.maxResolution,\n maxZoom: options.maxZoom,\n minZoom: options.minZoom,\n tileSize: options.tileSize,\n });\n\n super({\n attributions: options.attributions,\n cacheSize: options.cacheSize,\n crossOrigin: options.crossOrigin,\n interpolate: options.interpolate,\n opaque: options.opaque,\n projection: projection,\n reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n tileGrid: tileGrid,\n tileLoadFunction: options.tileLoadFunction,\n tilePixelRatio: options.tilePixelRatio,\n tileUrlFunction: options.tileUrlFunction,\n url: options.url,\n urls: options.urls,\n wrapX: options.wrapX !== undefined ? options.wrapX : true,\n transition: options.transition,\n attributionsCollapsible: options.attributionsCollapsible,\n zDirection: options.zDirection,\n });\n\n /**\n * @private\n * @type {number}\n */\n this.gutter_ = options.gutter !== undefined ? options.gutter : 0;\n }\n\n /**\n * @return {number} Gutter.\n */\n getGutter() {\n return this.gutter_;\n }\n}\n\nexport default XYZ;\n","/**\n * @module ol/source/CartoDB\n */\n\nimport XYZ from './XYZ.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {number} [cacheSize] Initial tile cache size. Will auto-grow to hold at least the number of tiles in the viewport.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images. Note that\n * you must provide a `crossOrigin` value if you want to access pixel data with the Canvas renderer.\n * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {import(\"../proj.js\").ProjectionLike} [projection='EPSG:3857'] Projection.\n * @property {number} [maxZoom=18] Max zoom.\n * @property {number} [minZoom] Minimum zoom.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * @property {Object} [config] If using anonymous maps, the CartoDB config to use. See\n * https://carto.com/developers/maps-api/guides/anonymous-maps/\n * for more detail.\n * If using named maps, a key-value lookup with the template parameters.\n * See https://carto.com/developers/maps-api/guides/named-maps/\n * for more detail.\n * @property {string} [map] If using named maps, this will be the name of the template to load.\n * See https://carto.com/developers/maps-api/guides/named-maps/\n * for more detail.\n * @property {string} [account] Username as used to access public Carto dashboard at https://{username}.carto.com/.\n * @property {number} [transition=250] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0]\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n */\n\n/**\n * @typedef {Object} CartoDBLayerInfo\n * @property {string} layergroupid The layer group ID\n * @property {{https: string}} cdn_url The CDN URL\n */\n\n/**\n * @classdesc\n * Layer source for the CartoDB Maps API.\n * @api\n */\nclass CartoDB extends XYZ {\n /**\n * @param {Options} options CartoDB options.\n */\n constructor(options) {\n super({\n attributions: options.attributions,\n cacheSize: options.cacheSize,\n crossOrigin: options.crossOrigin,\n maxZoom: options.maxZoom !== undefined ? options.maxZoom : 18,\n minZoom: options.minZoom,\n projection: options.projection,\n transition: options.transition,\n wrapX: options.wrapX,\n zDirection: options.zDirection,\n });\n\n /**\n * @type {string}\n * @private\n */\n this.account_ = options.account;\n\n /**\n * @type {string}\n * @private\n */\n this.mapId_ = options.map || '';\n\n /**\n * @type {!Object}\n * @private\n */\n this.config_ = options.config || {};\n\n /**\n * @type {!Object}\n * @private\n */\n this.templateCache_ = {};\n\n this.initializeMap_();\n }\n\n /**\n * Returns the current config.\n * @return {!Object} The current configuration.\n * @api\n */\n getConfig() {\n return this.config_;\n }\n\n /**\n * Updates the carto db config.\n * @param {Object} config a key-value lookup. Values will replace current values\n * in the config.\n * @api\n */\n updateConfig(config) {\n Object.assign(this.config_, config);\n this.initializeMap_();\n }\n\n /**\n * Sets the CartoDB config\n * @param {Object} config In the case of anonymous maps, a CartoDB configuration\n * object.\n * If using named maps, a key-value lookup with the template parameters.\n * @api\n */\n setConfig(config) {\n this.config_ = config || {};\n this.initializeMap_();\n }\n\n /**\n * Issue a request to initialize the CartoDB map.\n * @private\n */\n initializeMap_() {\n const paramHash = JSON.stringify(this.config_);\n if (this.templateCache_[paramHash]) {\n this.applyTemplate_(this.templateCache_[paramHash]);\n return;\n }\n let mapUrl = 'https://' + this.account_ + '.carto.com/api/v1/map';\n\n if (this.mapId_) {\n mapUrl += '/named/' + this.mapId_;\n }\n\n const client = new XMLHttpRequest();\n client.addEventListener(\n 'load',\n this.handleInitResponse_.bind(this, paramHash)\n );\n client.addEventListener('error', this.handleInitError_.bind(this));\n client.open('POST', mapUrl);\n client.setRequestHeader('Content-type', 'application/json');\n client.send(JSON.stringify(this.config_));\n }\n\n /**\n * Handle map initialization response.\n * @param {string} paramHash a hash representing the parameter set that was used\n * for the request\n * @param {Event} event Event.\n * @private\n */\n handleInitResponse_(paramHash, event) {\n const client = /** @type {XMLHttpRequest} */ (event.target);\n // status will be 0 for file:// urls\n if (!client.status || (client.status >= 200 && client.status < 300)) {\n let response;\n try {\n response = /** @type {CartoDBLayerInfo} */ (\n JSON.parse(client.responseText)\n );\n } catch (err) {\n this.setState('error');\n return;\n }\n this.applyTemplate_(response);\n this.templateCache_[paramHash] = response;\n this.setState('ready');\n } else {\n this.setState('error');\n }\n }\n\n /**\n * @private\n * @param {Event} event Event.\n */\n handleInitError_(event) {\n this.setState('error');\n }\n\n /**\n * Apply the new tile urls returned by carto db\n * @param {CartoDBLayerInfo} data Result of carto db call.\n * @private\n */\n applyTemplate_(data) {\n const tilesUrl =\n 'https://' +\n data.cdn_url.https +\n '/' +\n this.account_ +\n '/api/v1/map/' +\n data.layergroupid +\n '/{z}/{x}/{y}.png';\n this.setUrl(tilesUrl);\n }\n}\n\nexport default CartoDB;\n","\nexport default function quickselect(arr, k, left, right, compare) {\n quickselectStep(arr, k, left || 0, right || (arr.length - 1), compare || defaultCompare);\n}\n\nfunction quickselectStep(arr, k, left, right, compare) {\n\n while (right > left) {\n if (right - left > 600) {\n var n = right - left + 1;\n var m = k - left + 1;\n var z = Math.log(n);\n var s = 0.5 * Math.exp(2 * z / 3);\n var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);\n var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));\n var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));\n quickselectStep(arr, k, newLeft, newRight, compare);\n }\n\n var t = arr[k];\n var i = left;\n var j = right;\n\n swap(arr, left, k);\n if (compare(arr[right], t) > 0) swap(arr, left, right);\n\n while (i < j) {\n swap(arr, i, j);\n i++;\n j--;\n while (compare(arr[i], t) < 0) i++;\n while (compare(arr[j], t) > 0) j--;\n }\n\n if (compare(arr[left], t) === 0) swap(arr, left, j);\n else {\n j++;\n swap(arr, j, right);\n }\n\n if (j <= k) left = j + 1;\n if (k <= j) right = j - 1;\n }\n}\n\nfunction swap(arr, i, j) {\n var tmp = arr[i];\n arr[i] = arr[j];\n arr[j] = tmp;\n}\n\nfunction defaultCompare(a, b) {\n return a < b ? -1 : a > b ? 1 : 0;\n}\n","import quickselect from 'quickselect';\n\nexport default class RBush {\n constructor(maxEntries = 9) {\n // max entries in a node is 9 by default; min node fill is 40% for best performance\n this._maxEntries = Math.max(4, maxEntries);\n this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));\n this.clear();\n }\n\n all() {\n return this._all(this.data, []);\n }\n\n search(bbox) {\n let node = this.data;\n const result = [];\n\n if (!intersects(bbox, node)) return result;\n\n const toBBox = this.toBBox;\n const nodesToSearch = [];\n\n while (node) {\n for (let i = 0; i < node.children.length; i++) {\n const child = node.children[i];\n const childBBox = node.leaf ? toBBox(child) : child;\n\n if (intersects(bbox, childBBox)) {\n if (node.leaf) result.push(child);\n else if (contains(bbox, childBBox)) this._all(child, result);\n else nodesToSearch.push(child);\n }\n }\n node = nodesToSearch.pop();\n }\n\n return result;\n }\n\n collides(bbox) {\n let node = this.data;\n\n if (!intersects(bbox, node)) return false;\n\n const nodesToSearch = [];\n while (node) {\n for (let i = 0; i < node.children.length; i++) {\n const child = node.children[i];\n const childBBox = node.leaf ? this.toBBox(child) : child;\n\n if (intersects(bbox, childBBox)) {\n if (node.leaf || contains(bbox, childBBox)) return true;\n nodesToSearch.push(child);\n }\n }\n node = nodesToSearch.pop();\n }\n\n return false;\n }\n\n load(data) {\n if (!(data && data.length)) return this;\n\n if (data.length < this._minEntries) {\n for (let i = 0; i < data.length; i++) {\n this.insert(data[i]);\n }\n return this;\n }\n\n // recursively build the tree with the given data from scratch using OMT algorithm\n let node = this._build(data.slice(), 0, data.length - 1, 0);\n\n if (!this.data.children.length) {\n // save as is if tree is empty\n this.data = node;\n\n } else if (this.data.height === node.height) {\n // split root if trees have the same height\n this._splitRoot(this.data, node);\n\n } else {\n if (this.data.height < node.height) {\n // swap trees if inserted one is bigger\n const tmpNode = this.data;\n this.data = node;\n node = tmpNode;\n }\n\n // insert the small tree into the large tree at appropriate level\n this._insert(node, this.data.height - node.height - 1, true);\n }\n\n return this;\n }\n\n insert(item) {\n if (item) this._insert(item, this.data.height - 1);\n return this;\n }\n\n clear() {\n this.data = createNode([]);\n return this;\n }\n\n remove(item, equalsFn) {\n if (!item) return this;\n\n let node = this.data;\n const bbox = this.toBBox(item);\n const path = [];\n const indexes = [];\n let i, parent, goingUp;\n\n // depth-first iterative tree traversal\n while (node || path.length) {\n\n if (!node) { // go up\n node = path.pop();\n parent = path[path.length - 1];\n i = indexes.pop();\n goingUp = true;\n }\n\n if (node.leaf) { // check current node\n const index = findItem(item, node.children, equalsFn);\n\n if (index !== -1) {\n // item found, remove the item and condense tree upwards\n node.children.splice(index, 1);\n path.push(node);\n this._condense(path);\n return this;\n }\n }\n\n if (!goingUp && !node.leaf && contains(node, bbox)) { // go down\n path.push(node);\n indexes.push(i);\n i = 0;\n parent = node;\n node = node.children[0];\n\n } else if (parent) { // go right\n i++;\n node = parent.children[i];\n goingUp = false;\n\n } else node = null; // nothing found\n }\n\n return this;\n }\n\n toBBox(item) { return item; }\n\n compareMinX(a, b) { return a.minX - b.minX; }\n compareMinY(a, b) { return a.minY - b.minY; }\n\n toJSON() { return this.data; }\n\n fromJSON(data) {\n this.data = data;\n return this;\n }\n\n _all(node, result) {\n const nodesToSearch = [];\n while (node) {\n if (node.leaf) result.push(...node.children);\n else nodesToSearch.push(...node.children);\n\n node = nodesToSearch.pop();\n }\n return result;\n }\n\n _build(items, left, right, height) {\n\n const N = right - left + 1;\n let M = this._maxEntries;\n let node;\n\n if (N <= M) {\n // reached leaf level; return leaf\n node = createNode(items.slice(left, right + 1));\n calcBBox(node, this.toBBox);\n return node;\n }\n\n if (!height) {\n // target height of the bulk-loaded tree\n height = Math.ceil(Math.log(N) / Math.log(M));\n\n // target number of root entries to maximize storage utilization\n M = Math.ceil(N / Math.pow(M, height - 1));\n }\n\n node = createNode([]);\n node.leaf = false;\n node.height = height;\n\n // split the items into M mostly square tiles\n\n const N2 = Math.ceil(N / M);\n const N1 = N2 * Math.ceil(Math.sqrt(M));\n\n multiSelect(items, left, right, N1, this.compareMinX);\n\n for (let i = left; i <= right; i += N1) {\n\n const right2 = Math.min(i + N1 - 1, right);\n\n multiSelect(items, i, right2, N2, this.compareMinY);\n\n for (let j = i; j <= right2; j += N2) {\n\n const right3 = Math.min(j + N2 - 1, right2);\n\n // pack each entry recursively\n node.children.push(this._build(items, j, right3, height - 1));\n }\n }\n\n calcBBox(node, this.toBBox);\n\n return node;\n }\n\n _chooseSubtree(bbox, node, level, path) {\n while (true) {\n path.push(node);\n\n if (node.leaf || path.length - 1 === level) break;\n\n let minArea = Infinity;\n let minEnlargement = Infinity;\n let targetNode;\n\n for (let i = 0; i < node.children.length; i++) {\n const child = node.children[i];\n const area = bboxArea(child);\n const enlargement = enlargedArea(bbox, child) - area;\n\n // choose entry with the least area enlargement\n if (enlargement < minEnlargement) {\n minEnlargement = enlargement;\n minArea = area < minArea ? area : minArea;\n targetNode = child;\n\n } else if (enlargement === minEnlargement) {\n // otherwise choose one with the smallest area\n if (area < minArea) {\n minArea = area;\n targetNode = child;\n }\n }\n }\n\n node = targetNode || node.children[0];\n }\n\n return node;\n }\n\n _insert(item, level, isNode) {\n const bbox = isNode ? item : this.toBBox(item);\n const insertPath = [];\n\n // find the best node for accommodating the item, saving all nodes along the path too\n const node = this._chooseSubtree(bbox, this.data, level, insertPath);\n\n // put the item into the node\n node.children.push(item);\n extend(node, bbox);\n\n // split on node overflow; propagate upwards if necessary\n while (level >= 0) {\n if (insertPath[level].children.length > this._maxEntries) {\n this._split(insertPath, level);\n level--;\n } else break;\n }\n\n // adjust bboxes along the insertion path\n this._adjustParentBBoxes(bbox, insertPath, level);\n }\n\n // split overflowed node into two\n _split(insertPath, level) {\n const node = insertPath[level];\n const M = node.children.length;\n const m = this._minEntries;\n\n this._chooseSplitAxis(node, m, M);\n\n const splitIndex = this._chooseSplitIndex(node, m, M);\n\n const newNode = createNode(node.children.splice(splitIndex, node.children.length - splitIndex));\n newNode.height = node.height;\n newNode.leaf = node.leaf;\n\n calcBBox(node, this.toBBox);\n calcBBox(newNode, this.toBBox);\n\n if (level) insertPath[level - 1].children.push(newNode);\n else this._splitRoot(node, newNode);\n }\n\n _splitRoot(node, newNode) {\n // split root node\n this.data = createNode([node, newNode]);\n this.data.height = node.height + 1;\n this.data.leaf = false;\n calcBBox(this.data, this.toBBox);\n }\n\n _chooseSplitIndex(node, m, M) {\n let index;\n let minOverlap = Infinity;\n let minArea = Infinity;\n\n for (let i = m; i <= M - m; i++) {\n const bbox1 = distBBox(node, 0, i, this.toBBox);\n const bbox2 = distBBox(node, i, M, this.toBBox);\n\n const overlap = intersectionArea(bbox1, bbox2);\n const area = bboxArea(bbox1) + bboxArea(bbox2);\n\n // choose distribution with minimum overlap\n if (overlap < minOverlap) {\n minOverlap = overlap;\n index = i;\n\n minArea = area < minArea ? area : minArea;\n\n } else if (overlap === minOverlap) {\n // otherwise choose distribution with minimum area\n if (area < minArea) {\n minArea = area;\n index = i;\n }\n }\n }\n\n return index || M - m;\n }\n\n // sorts node children by the best axis for split\n _chooseSplitAxis(node, m, M) {\n const compareMinX = node.leaf ? this.compareMinX : compareNodeMinX;\n const compareMinY = node.leaf ? this.compareMinY : compareNodeMinY;\n const xMargin = this._allDistMargin(node, m, M, compareMinX);\n const yMargin = this._allDistMargin(node, m, M, compareMinY);\n\n // if total distributions margin value is minimal for x, sort by minX,\n // otherwise it's already sorted by minY\n if (xMargin < yMargin) node.children.sort(compareMinX);\n }\n\n // total margin of all possible split distributions where each node is at least m full\n _allDistMargin(node, m, M, compare) {\n node.children.sort(compare);\n\n const toBBox = this.toBBox;\n const leftBBox = distBBox(node, 0, m, toBBox);\n const rightBBox = distBBox(node, M - m, M, toBBox);\n let margin = bboxMargin(leftBBox) + bboxMargin(rightBBox);\n\n for (let i = m; i < M - m; i++) {\n const child = node.children[i];\n extend(leftBBox, node.leaf ? toBBox(child) : child);\n margin += bboxMargin(leftBBox);\n }\n\n for (let i = M - m - 1; i >= m; i--) {\n const child = node.children[i];\n extend(rightBBox, node.leaf ? toBBox(child) : child);\n margin += bboxMargin(rightBBox);\n }\n\n return margin;\n }\n\n _adjustParentBBoxes(bbox, path, level) {\n // adjust bboxes along the given tree path\n for (let i = level; i >= 0; i--) {\n extend(path[i], bbox);\n }\n }\n\n _condense(path) {\n // go through the path, removing empty nodes and updating bboxes\n for (let i = path.length - 1, siblings; i >= 0; i--) {\n if (path[i].children.length === 0) {\n if (i > 0) {\n siblings = path[i - 1].children;\n siblings.splice(siblings.indexOf(path[i]), 1);\n\n } else this.clear();\n\n } else calcBBox(path[i], this.toBBox);\n }\n }\n}\n\nfunction findItem(item, items, equalsFn) {\n if (!equalsFn) return items.indexOf(item);\n\n for (let i = 0; i < items.length; i++) {\n if (equalsFn(item, items[i])) return i;\n }\n return -1;\n}\n\n// calculate node's bbox from bboxes of its children\nfunction calcBBox(node, toBBox) {\n distBBox(node, 0, node.children.length, toBBox, node);\n}\n\n// min bounding rectangle of node children from k to p-1\nfunction distBBox(node, k, p, toBBox, destNode) {\n if (!destNode) destNode = createNode(null);\n destNode.minX = Infinity;\n destNode.minY = Infinity;\n destNode.maxX = -Infinity;\n destNode.maxY = -Infinity;\n\n for (let i = k; i < p; i++) {\n const child = node.children[i];\n extend(destNode, node.leaf ? toBBox(child) : child);\n }\n\n return destNode;\n}\n\nfunction extend(a, b) {\n a.minX = Math.min(a.minX, b.minX);\n a.minY = Math.min(a.minY, b.minY);\n a.maxX = Math.max(a.maxX, b.maxX);\n a.maxY = Math.max(a.maxY, b.maxY);\n return a;\n}\n\nfunction compareNodeMinX(a, b) { return a.minX - b.minX; }\nfunction compareNodeMinY(a, b) { return a.minY - b.minY; }\n\nfunction bboxArea(a) { return (a.maxX - a.minX) * (a.maxY - a.minY); }\nfunction bboxMargin(a) { return (a.maxX - a.minX) + (a.maxY - a.minY); }\n\nfunction enlargedArea(a, b) {\n return (Math.max(b.maxX, a.maxX) - Math.min(b.minX, a.minX)) *\n (Math.max(b.maxY, a.maxY) - Math.min(b.minY, a.minY));\n}\n\nfunction intersectionArea(a, b) {\n const minX = Math.max(a.minX, b.minX);\n const minY = Math.max(a.minY, b.minY);\n const maxX = Math.min(a.maxX, b.maxX);\n const maxY = Math.min(a.maxY, b.maxY);\n\n return Math.max(0, maxX - minX) *\n Math.max(0, maxY - minY);\n}\n\nfunction contains(a, b) {\n return a.minX <= b.minX &&\n a.minY <= b.minY &&\n b.maxX <= a.maxX &&\n b.maxY <= a.maxY;\n}\n\nfunction intersects(a, b) {\n return b.minX <= a.maxX &&\n b.minY <= a.maxY &&\n b.maxX >= a.minX &&\n b.maxY >= a.minY;\n}\n\nfunction createNode(children) {\n return {\n children,\n height: 1,\n leaf: true,\n minX: Infinity,\n minY: Infinity,\n maxX: -Infinity,\n maxY: -Infinity\n };\n}\n\n// sort an array so that items come in groups of n unsorted items, with groups sorted between each other;\n// combines selection algorithm with binary divide & conquer approach\n\nfunction multiSelect(arr, left, right, n, compare) {\n const stack = [left, right];\n\n while (stack.length) {\n right = stack.pop();\n left = stack.pop();\n\n if (right - left <= n) continue;\n\n const mid = left + Math.ceil((right - left) / n / 2) * n;\n quickselect(arr, mid, left, right, compare);\n\n stack.push(left, mid, mid, right);\n }\n}\n","/**\n * @module ol/structs/RBush\n */\nimport RBush_ from 'rbush';\nimport {createOrUpdate, equals} from '../extent.js';\nimport {getUid} from '../util.js';\nimport {isEmpty} from '../obj.js';\n\n/**\n * @typedef {Object} Entry\n * @property {number} minX MinX.\n * @property {number} minY MinY.\n * @property {number} maxX MaxX.\n * @property {number} maxY MaxY.\n * @property {Object} [value] Value.\n */\n\n/**\n * @classdesc\n * Wrapper around the RBush by Vladimir Agafonkin.\n * See https://github.com/mourner/rbush.\n *\n * @template T\n */\nclass RBush {\n /**\n * @param {number} [maxEntries] Max entries.\n */\n constructor(maxEntries) {\n /**\n * @private\n */\n this.rbush_ = new RBush_(maxEntries);\n\n /**\n * A mapping between the objects added to this rbush wrapper\n * and the objects that are actually added to the internal rbush.\n * @private\n * @type {Object}\n */\n this.items_ = {};\n }\n\n /**\n * Insert a value into the RBush.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {T} value Value.\n */\n insert(extent, value) {\n /** @type {Entry} */\n const item = {\n minX: extent[0],\n minY: extent[1],\n maxX: extent[2],\n maxY: extent[3],\n value: value,\n };\n\n this.rbush_.insert(item);\n this.items_[getUid(value)] = item;\n }\n\n /**\n * Bulk-insert values into the RBush.\n * @param {Array} extents Extents.\n * @param {Array} values Values.\n */\n load(extents, values) {\n const items = new Array(values.length);\n for (let i = 0, l = values.length; i < l; i++) {\n const extent = extents[i];\n const value = values[i];\n\n /** @type {Entry} */\n const item = {\n minX: extent[0],\n minY: extent[1],\n maxX: extent[2],\n maxY: extent[3],\n value: value,\n };\n items[i] = item;\n this.items_[getUid(value)] = item;\n }\n this.rbush_.load(items);\n }\n\n /**\n * Remove a value from the RBush.\n * @param {T} value Value.\n * @return {boolean} Removed.\n */\n remove(value) {\n const uid = getUid(value);\n\n // get the object in which the value was wrapped when adding to the\n // internal rbush. then use that object to do the removal.\n const item = this.items_[uid];\n delete this.items_[uid];\n return this.rbush_.remove(item) !== null;\n }\n\n /**\n * Update the extent of a value in the RBush.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {T} value Value.\n */\n update(extent, value) {\n const item = this.items_[getUid(value)];\n const bbox = [item.minX, item.minY, item.maxX, item.maxY];\n if (!equals(bbox, extent)) {\n this.remove(value);\n this.insert(extent, value);\n }\n }\n\n /**\n * Return all values in the RBush.\n * @return {Array} All.\n */\n getAll() {\n const items = this.rbush_.all();\n return items.map(function (item) {\n return item.value;\n });\n }\n\n /**\n * Return all values in the given extent.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @return {Array} All in extent.\n */\n getInExtent(extent) {\n /** @type {Entry} */\n const bbox = {\n minX: extent[0],\n minY: extent[1],\n maxX: extent[2],\n maxY: extent[3],\n };\n const items = this.rbush_.search(bbox);\n return items.map(function (item) {\n return item.value;\n });\n }\n\n /**\n * Calls a callback function with each value in the tree.\n * If the callback returns a truthy value, this value is returned without\n * checking the rest of the tree.\n * @param {function(T): *} callback Callback.\n * @return {*} Callback return value.\n */\n forEach(callback) {\n return this.forEach_(this.getAll(), callback);\n }\n\n /**\n * Calls a callback function with each value in the provided extent.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {function(T): *} callback Callback.\n * @return {*} Callback return value.\n */\n forEachInExtent(extent, callback) {\n return this.forEach_(this.getInExtent(extent), callback);\n }\n\n /**\n * @param {Array} values Values.\n * @param {function(T): *} callback Callback.\n * @private\n * @return {*} Callback return value.\n */\n forEach_(values, callback) {\n let result;\n for (let i = 0, l = values.length; i < l; i++) {\n result = callback(values[i]);\n if (result) {\n return result;\n }\n }\n return result;\n }\n\n /**\n * @return {boolean} Is empty.\n */\n isEmpty() {\n return isEmpty(this.items_);\n }\n\n /**\n * Remove all values from the RBush.\n */\n clear() {\n this.rbush_.clear();\n this.items_ = {};\n }\n\n /**\n * @param {import(\"../extent.js\").Extent} [extent] Extent.\n * @return {import(\"../extent.js\").Extent} Extent.\n */\n getExtent(extent) {\n const data = this.rbush_.toJSON();\n return createOrUpdate(data.minX, data.minY, data.maxX, data.maxY, extent);\n }\n\n /**\n * @param {RBush} rbush R-Tree.\n */\n concat(rbush) {\n this.rbush_.load(rbush.rbush_.all());\n for (const i in rbush.items_) {\n this.items_[i] = rbush.items_[i];\n }\n }\n}\n\nexport default RBush;\n","/**\n * @module ol/source/VectorEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n /**\n * Triggered when a feature is added to the source.\n * @event module:ol/source/Vector.VectorSourceEvent#addfeature\n * @api\n */\n ADDFEATURE: 'addfeature',\n\n /**\n * Triggered when a feature is updated.\n * @event module:ol/source/Vector.VectorSourceEvent#changefeature\n * @api\n */\n CHANGEFEATURE: 'changefeature',\n\n /**\n * Triggered when the clear method is called on the source.\n * @event module:ol/source/Vector.VectorSourceEvent#clear\n * @api\n */\n CLEAR: 'clear',\n\n /**\n * Triggered when a feature is removed from the source.\n * See {@link module:ol/source/Vector~VectorSource#clear source.clear()} for exceptions.\n * @event module:ol/source/Vector.VectorSourceEvent#removefeature\n * @api\n */\n REMOVEFEATURE: 'removefeature',\n\n /**\n * Triggered when features starts loading.\n * @event module:ol/source/Vector.VectorSourceEvent#featuresloadstart\n * @api\n */\n FEATURESLOADSTART: 'featuresloadstart',\n\n /**\n * Triggered when features finishes loading.\n * @event module:ol/source/Vector.VectorSourceEvent#featuresloadend\n * @api\n */\n FEATURESLOADEND: 'featuresloadend',\n\n /**\n * Triggered if feature loading results in an error.\n * @event module:ol/source/Vector.VectorSourceEvent#featuresloaderror\n * @api\n */\n FEATURESLOADERROR: 'featuresloaderror',\n};\n\n/**\n * @typedef {'addfeature'|'changefeature'|'clear'|'removefeature'|'featuresloadstart'|'featuresloadend'|'featuresloaderror'} VectorSourceEventTypes\n */\n","/**\n * @module ol/source/Vector\n */\n\nimport Collection from '../Collection.js';\nimport CollectionEventType from '../CollectionEventType.js';\nimport Event from '../events/Event.js';\nimport EventType from '../events/EventType.js';\nimport ObjectEventType from '../ObjectEventType.js';\nimport RBush from '../structs/RBush.js';\nimport Source from './Source.js';\nimport VectorEventType from './VectorEventType.js';\nimport {TRUE, VOID} from '../functions.js';\nimport {all as allStrategy} from '../loadingstrategy.js';\nimport {assert} from '../asserts.js';\nimport {containsExtent, equals, wrapAndSliceX} from '../extent.js';\nimport {extend} from '../array.js';\nimport {getUid} from '../util.js';\nimport {isEmpty} from '../obj.js';\nimport {listen, unlistenByKey} from '../events.js';\nimport {xhr} from '../featureloader.js';\n\n/**\n * A function that takes an {@link module:ol/extent~Extent} and a resolution as arguments, and\n * returns an array of {@link module:ol/extent~Extent} with the extents to load. Usually this\n * is one of the standard {@link module:ol/loadingstrategy} strategies.\n *\n * @typedef {function(import(\"../extent.js\").Extent, number, import(\"../proj/Projection.js\").default): Array} LoadingStrategy\n * @api\n */\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/source/Vector~VectorSource} instances are instances of this\n * type.\n * @template {import(\"../geom/Geometry.js\").default} [Geometry=import(\"../geom/Geometry.js\").default]\n */\nexport class VectorSourceEvent extends Event {\n /**\n * @param {string} type Type.\n * @param {import(\"../Feature.js\").default} [feature] Feature.\n * @param {Array>} [features] Features.\n */\n constructor(type, feature, features) {\n super(type);\n\n /**\n * The added or removed feature for the `ADDFEATURE` and `REMOVEFEATURE` events, `undefined` otherwise.\n * @type {import(\"../Feature.js\").default|undefined}\n * @api\n */\n this.feature = feature;\n\n /**\n * The loaded features for the `FEATURESLOADED` event, `undefined` otherwise.\n * @type {Array>|undefined}\n * @api\n */\n this.features = features;\n }\n}\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature &\n * import(\"../Observable\").OnSignature &\n * import(\"../Observable\").OnSignature &\n * import(\"../Observable\").CombinedOnSignature} VectorSourceOnSignature\n */\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {Array>|Collection>} [features]\n * Features. If provided as {@link module:ol/Collection~Collection}, the features in the source\n * and the collection will stay in sync.\n * @property {import(\"../format/Feature.js\").default} [format] The feature format used by the XHR\n * feature loader when `url` is set. Required if `url` is set, otherwise ignored.\n * @property {import(\"../featureloader.js\").FeatureLoader} [loader]\n * The loader function used to load features, from a remote source for example.\n * If this is not set and `url` is set, the source will create and use an XHR\n * feature loader. The `'featuresloadend'` and `'featuresloaderror'` events\n * will only fire if the `success` and `failure` callbacks are used.\n *\n * Example:\n *\n * ```js\n * import Vector from 'ol/source/Vector.js';\n * import GeoJSON from 'ol/format/GeoJSON.js';\n * import {bbox} from 'ol/loadingstrategy.js';\n *\n * const vectorSource = new Vector({\n * format: new GeoJSON(),\n * loader: function(extent, resolution, projection, success, failure) {\n * const proj = projection.getCode();\n * const url = 'https://ahocevar.com/geoserver/wfs?service=WFS&' +\n * 'version=1.1.0&request=GetFeature&typename=osm:water_areas&' +\n * 'outputFormat=application/json&srsname=' + proj + '&' +\n * 'bbox=' + extent.join(',') + ',' + proj;\n * const xhr = new XMLHttpRequest();\n * xhr.open('GET', url);\n * const onError = function() {\n * vectorSource.removeLoadedExtent(extent);\n * failure();\n * }\n * xhr.onerror = onError;\n * xhr.onload = function() {\n * if (xhr.status == 200) {\n * const features = vectorSource.getFormat().readFeatures(xhr.responseText);\n * vectorSource.addFeatures(features);\n * success(features);\n * } else {\n * onError();\n * }\n * }\n * xhr.send();\n * },\n * strategy: bbox,\n * });\n * ```\n * @property {boolean} [overlaps=true] This source may have overlapping geometries.\n * Setting this to `false` (e.g. for sources with polygons that represent administrative\n * boundaries or TopoJSON sources) allows the renderer to optimise fill and\n * stroke operations.\n * @property {LoadingStrategy} [strategy] The loading strategy to use.\n * By default an {@link module:ol/loadingstrategy.all}\n * strategy is used, a one-off strategy which loads all features at once.\n * @property {string|import(\"../featureloader.js\").FeatureUrlFunction} [url]\n * Setting this option instructs the source to load features using an XHR loader\n * (see {@link module:ol/featureloader.xhr}). Use a `string` and an\n * {@link module:ol/loadingstrategy.all} for a one-off download of all features from\n * the given URL. Use a {@link module:ol/featureloader~FeatureUrlFunction} to generate the url with\n * other loading strategies.\n * Requires `format` to be set as well.\n * When default XHR feature loader is provided, the features will\n * be transformed from the data projection to the view projection\n * during parsing. If your remote data source does not advertise its projection\n * properly, this transformation will be incorrect. For some formats, the\n * default projection (usually EPSG:4326) can be overridden by setting the\n * dataProjection constructor option on the format.\n * Note that if a source contains non-feature data, such as a GeoJSON geometry\n * or a KML NetworkLink, these will be ignored. Use a custom loader to load these.\n * @property {boolean} [useSpatialIndex=true]\n * By default, an RTree is used as spatial index. When features are removed and\n * added frequently, and the total number of features is low, setting this to\n * `false` may improve performance.\n *\n * Note that\n * {@link module:ol/source/Vector~VectorSource#getFeaturesInExtent},\n * {@link module:ol/source/Vector~VectorSource#getClosestFeatureToCoordinate} and\n * {@link module:ol/source/Vector~VectorSource#getExtent} cannot be used when `useSpatialIndex` is\n * set to `false`, and {@link module:ol/source/Vector~VectorSource#forEachFeatureInExtent} will loop\n * through all features.\n *\n * When set to `false`, the features will be maintained in an\n * {@link module:ol/Collection~Collection}, which can be retrieved through\n * {@link module:ol/source/Vector~VectorSource#getFeaturesCollection}.\n * @property {boolean} [wrapX=true] Wrap the world horizontally. For vector editing across the\n * -180° and 180° meridians to work properly, this should be set to `false`. The\n * resulting geometry coordinates will then exceed the world bounds.\n * @template {import(\"../geom/Geometry.js\").default} [Geometry=import(\"../geom/Geometry.js\").default]\n */\n\n/**\n * @classdesc\n * Provides a source of features for vector layers. Vector features provided\n * by this source are suitable for editing. See {@link module:ol/source/VectorTile~VectorTile} for\n * vector data that is optimized for rendering.\n *\n * @fires VectorSourceEvent\n * @api\n * @template {import(\"../geom/Geometry.js\").default} [Geometry=import(\"../geom/Geometry.js\").default]\n */\nclass VectorSource extends Source {\n /**\n * @param {Options} [options] Vector source options.\n */\n constructor(options) {\n options = options || {};\n\n super({\n attributions: options.attributions,\n interpolate: true,\n projection: undefined,\n state: 'ready',\n wrapX: options.wrapX !== undefined ? options.wrapX : true,\n });\n\n /***\n * @type {VectorSourceOnSignature}\n */\n this.on;\n\n /***\n * @type {VectorSourceOnSignature}\n */\n this.once;\n\n /***\n * @type {VectorSourceOnSignature}\n */\n this.un;\n\n /**\n * @private\n * @type {import(\"../featureloader.js\").FeatureLoader}\n */\n this.loader_ = VOID;\n\n /**\n * @private\n * @type {import(\"../format/Feature.js\").default|undefined}\n */\n this.format_ = options.format;\n\n /**\n * @private\n * @type {boolean}\n */\n this.overlaps_ = options.overlaps === undefined ? true : options.overlaps;\n\n /**\n * @private\n * @type {string|import(\"../featureloader.js\").FeatureUrlFunction|undefined}\n */\n this.url_ = options.url;\n\n if (options.loader !== undefined) {\n this.loader_ = options.loader;\n } else if (this.url_ !== undefined) {\n assert(this.format_, 7); // `format` must be set when `url` is set\n // create a XHR feature loader for \"url\" and \"format\"\n this.loader_ = xhr(\n this.url_,\n /** @type {import(\"../format/Feature.js\").default} */ (this.format_)\n );\n }\n\n /**\n * @private\n * @type {LoadingStrategy}\n */\n this.strategy_ =\n options.strategy !== undefined ? options.strategy : allStrategy;\n\n const useSpatialIndex =\n options.useSpatialIndex !== undefined ? options.useSpatialIndex : true;\n\n /**\n * @private\n * @type {RBush>}\n */\n this.featuresRtree_ = useSpatialIndex ? new RBush() : null;\n\n /**\n * @private\n * @type {RBush<{extent: import(\"../extent.js\").Extent}>}\n */\n this.loadedExtentsRtree_ = new RBush();\n\n /**\n * @type {number}\n * @private\n */\n this.loadingExtentsCount_ = 0;\n\n /**\n * @private\n * @type {!Object>}\n */\n this.nullGeometryFeatures_ = {};\n\n /**\n * A lookup of features by id (the return from feature.getId()).\n * @private\n * @type {!Object>}\n */\n this.idIndex_ = {};\n\n /**\n * A lookup of features by uid (using getUid(feature)).\n * @private\n * @type {!Object>}\n */\n this.uidIndex_ = {};\n\n /**\n * @private\n * @type {Object>}\n */\n this.featureChangeKeys_ = {};\n\n /**\n * @private\n * @type {Collection>|null}\n */\n this.featuresCollection_ = null;\n\n /** @type {Collection>} */\n let collection;\n /** @type {Array>} */\n let features;\n if (Array.isArray(options.features)) {\n features = options.features;\n } else if (options.features) {\n collection = options.features;\n features = collection.getArray();\n }\n if (!useSpatialIndex && collection === undefined) {\n collection = new Collection(features);\n }\n if (features !== undefined) {\n this.addFeaturesInternal(features);\n }\n if (collection !== undefined) {\n this.bindFeaturesCollection_(collection);\n }\n }\n\n /**\n * Add a single feature to the source. If you want to add a batch of features\n * at once, call {@link module:ol/source/Vector~VectorSource#addFeatures #addFeatures()}\n * instead. A feature will not be added to the source if feature with\n * the same id is already there. The reason for this behavior is to avoid\n * feature duplication when using bbox or tile loading strategies.\n * Note: this also applies if an {@link module:ol/Collection~Collection} is used for features,\n * meaning that if a feature with a duplicate id is added in the collection, it will\n * be removed from it right away.\n * @param {import(\"../Feature.js\").default} feature Feature to add.\n * @api\n */\n addFeature(feature) {\n this.addFeatureInternal(feature);\n this.changed();\n }\n\n /**\n * Add a feature without firing a `change` event.\n * @param {import(\"../Feature.js\").default} feature Feature.\n * @protected\n */\n addFeatureInternal(feature) {\n const featureKey = getUid(feature);\n\n if (!this.addToIndex_(featureKey, feature)) {\n if (this.featuresCollection_) {\n this.featuresCollection_.remove(feature);\n }\n return;\n }\n\n this.setupChangeEvents_(featureKey, feature);\n\n const geometry = feature.getGeometry();\n if (geometry) {\n const extent = geometry.getExtent();\n if (this.featuresRtree_) {\n this.featuresRtree_.insert(extent, feature);\n }\n } else {\n this.nullGeometryFeatures_[featureKey] = feature;\n }\n\n this.dispatchEvent(\n new VectorSourceEvent(VectorEventType.ADDFEATURE, feature)\n );\n }\n\n /**\n * @param {string} featureKey Unique identifier for the feature.\n * @param {import(\"../Feature.js\").default} feature The feature.\n * @private\n */\n setupChangeEvents_(featureKey, feature) {\n this.featureChangeKeys_[featureKey] = [\n listen(feature, EventType.CHANGE, this.handleFeatureChange_, this),\n listen(\n feature,\n ObjectEventType.PROPERTYCHANGE,\n this.handleFeatureChange_,\n this\n ),\n ];\n }\n\n /**\n * @param {string} featureKey Unique identifier for the feature.\n * @param {import(\"../Feature.js\").default} feature The feature.\n * @return {boolean} The feature is \"valid\", in the sense that it is also a\n * candidate for insertion into the Rtree.\n * @private\n */\n addToIndex_(featureKey, feature) {\n let valid = true;\n const id = feature.getId();\n if (id !== undefined) {\n if (!(id.toString() in this.idIndex_)) {\n this.idIndex_[id.toString()] = feature;\n } else {\n valid = false;\n }\n }\n if (valid) {\n assert(!(featureKey in this.uidIndex_), 30); // The passed `feature` was already added to the source\n this.uidIndex_[featureKey] = feature;\n }\n return valid;\n }\n\n /**\n * Add a batch of features to the source.\n * @param {Array>} features Features to add.\n * @api\n */\n addFeatures(features) {\n this.addFeaturesInternal(features);\n this.changed();\n }\n\n /**\n * Add features without firing a `change` event.\n * @param {Array>} features Features.\n * @protected\n */\n addFeaturesInternal(features) {\n const extents = [];\n const newFeatures = [];\n const geometryFeatures = [];\n\n for (let i = 0, length = features.length; i < length; i++) {\n const feature = features[i];\n const featureKey = getUid(feature);\n if (this.addToIndex_(featureKey, feature)) {\n newFeatures.push(feature);\n }\n }\n\n for (let i = 0, length = newFeatures.length; i < length; i++) {\n const feature = newFeatures[i];\n const featureKey = getUid(feature);\n this.setupChangeEvents_(featureKey, feature);\n\n const geometry = feature.getGeometry();\n if (geometry) {\n const extent = geometry.getExtent();\n extents.push(extent);\n geometryFeatures.push(feature);\n } else {\n this.nullGeometryFeatures_[featureKey] = feature;\n }\n }\n if (this.featuresRtree_) {\n this.featuresRtree_.load(extents, geometryFeatures);\n }\n\n if (this.hasListener(VectorEventType.ADDFEATURE)) {\n for (let i = 0, length = newFeatures.length; i < length; i++) {\n this.dispatchEvent(\n new VectorSourceEvent(VectorEventType.ADDFEATURE, newFeatures[i])\n );\n }\n }\n }\n\n /**\n * @param {!Collection>} collection Collection.\n * @private\n */\n bindFeaturesCollection_(collection) {\n let modifyingCollection = false;\n this.addEventListener(\n VectorEventType.ADDFEATURE,\n /**\n * @param {VectorSourceEvent} evt The vector source event\n */\n function (evt) {\n if (!modifyingCollection) {\n modifyingCollection = true;\n collection.push(evt.feature);\n modifyingCollection = false;\n }\n }\n );\n this.addEventListener(\n VectorEventType.REMOVEFEATURE,\n /**\n * @param {VectorSourceEvent} evt The vector source event\n */\n function (evt) {\n if (!modifyingCollection) {\n modifyingCollection = true;\n collection.remove(evt.feature);\n modifyingCollection = false;\n }\n }\n );\n collection.addEventListener(\n CollectionEventType.ADD,\n /**\n * @param {import(\"../Collection.js\").CollectionEvent>} evt The collection event\n */\n (evt) => {\n if (!modifyingCollection) {\n modifyingCollection = true;\n this.addFeature(evt.element);\n modifyingCollection = false;\n }\n }\n );\n collection.addEventListener(\n CollectionEventType.REMOVE,\n /**\n * @param {import(\"../Collection.js\").CollectionEvent>} evt The collection event\n */\n (evt) => {\n if (!modifyingCollection) {\n modifyingCollection = true;\n this.removeFeature(evt.element);\n modifyingCollection = false;\n }\n }\n );\n this.featuresCollection_ = collection;\n }\n\n /**\n * Remove all features from the source.\n * @param {boolean} [fast] Skip dispatching of {@link module:ol/source/Vector.VectorSourceEvent#event:removefeature} events.\n * @api\n */\n clear(fast) {\n if (fast) {\n for (const featureId in this.featureChangeKeys_) {\n const keys = this.featureChangeKeys_[featureId];\n keys.forEach(unlistenByKey);\n }\n if (!this.featuresCollection_) {\n this.featureChangeKeys_ = {};\n this.idIndex_ = {};\n this.uidIndex_ = {};\n }\n } else {\n if (this.featuresRtree_) {\n const removeAndIgnoreReturn = (feature) => {\n this.removeFeatureInternal(feature);\n };\n this.featuresRtree_.forEach(removeAndIgnoreReturn);\n for (const id in this.nullGeometryFeatures_) {\n this.removeFeatureInternal(this.nullGeometryFeatures_[id]);\n }\n }\n }\n if (this.featuresCollection_) {\n this.featuresCollection_.clear();\n }\n\n if (this.featuresRtree_) {\n this.featuresRtree_.clear();\n }\n this.nullGeometryFeatures_ = {};\n\n const clearEvent = new VectorSourceEvent(VectorEventType.CLEAR);\n this.dispatchEvent(clearEvent);\n this.changed();\n }\n\n /**\n * Iterate through all features on the source, calling the provided callback\n * with each one. If the callback returns any \"truthy\" value, iteration will\n * stop and the function will return the same value.\n * Note: this function only iterate through the feature that have a defined geometry.\n *\n * @param {function(import(\"../Feature.js\").default): T} callback Called with each feature\n * on the source. Return a truthy value to stop iteration.\n * @return {T|undefined} The return value from the last call to the callback.\n * @template T\n * @api\n */\n forEachFeature(callback) {\n if (this.featuresRtree_) {\n return this.featuresRtree_.forEach(callback);\n } else if (this.featuresCollection_) {\n this.featuresCollection_.forEach(callback);\n }\n }\n\n /**\n * Iterate through all features whose geometries contain the provided\n * coordinate, calling the callback with each feature. If the callback returns\n * a \"truthy\" value, iteration will stop and the function will return the same\n * value.\n *\n * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {function(import(\"../Feature.js\").default): T} callback Called with each feature\n * whose goemetry contains the provided coordinate.\n * @return {T|undefined} The return value from the last call to the callback.\n * @template T\n */\n forEachFeatureAtCoordinateDirect(coordinate, callback) {\n const extent = [coordinate[0], coordinate[1], coordinate[0], coordinate[1]];\n return this.forEachFeatureInExtent(extent, function (feature) {\n const geometry = feature.getGeometry();\n if (geometry.intersectsCoordinate(coordinate)) {\n return callback(feature);\n }\n return undefined;\n });\n }\n\n /**\n * Iterate through all features whose bounding box intersects the provided\n * extent (note that the feature's geometry may not intersect the extent),\n * calling the callback with each feature. If the callback returns a \"truthy\"\n * value, iteration will stop and the function will return the same value.\n *\n * If you are interested in features whose geometry intersects an extent, call\n * the {@link module:ol/source/Vector~VectorSource#forEachFeatureIntersectingExtent #forEachFeatureIntersectingExtent()} method instead.\n *\n * When `useSpatialIndex` is set to false, this method will loop through all\n * features, equivalent to {@link module:ol/source/Vector~VectorSource#forEachFeature #forEachFeature()}.\n *\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {function(import(\"../Feature.js\").default): T} callback Called with each feature\n * whose bounding box intersects the provided extent.\n * @return {T|undefined} The return value from the last call to the callback.\n * @template T\n * @api\n */\n forEachFeatureInExtent(extent, callback) {\n if (this.featuresRtree_) {\n return this.featuresRtree_.forEachInExtent(extent, callback);\n } else if (this.featuresCollection_) {\n this.featuresCollection_.forEach(callback);\n }\n }\n\n /**\n * Iterate through all features whose geometry intersects the provided extent,\n * calling the callback with each feature. If the callback returns a \"truthy\"\n * value, iteration will stop and the function will return the same value.\n *\n * If you only want to test for bounding box intersection, call the\n * {@link module:ol/source/Vector~VectorSource#forEachFeatureInExtent #forEachFeatureInExtent()} method instead.\n *\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {function(import(\"../Feature.js\").default): T} callback Called with each feature\n * whose geometry intersects the provided extent.\n * @return {T|undefined} The return value from the last call to the callback.\n * @template T\n * @api\n */\n forEachFeatureIntersectingExtent(extent, callback) {\n return this.forEachFeatureInExtent(\n extent,\n /**\n * @param {import(\"../Feature.js\").default} feature Feature.\n * @return {T|undefined} The return value from the last call to the callback.\n */\n function (feature) {\n const geometry = feature.getGeometry();\n if (geometry.intersectsExtent(extent)) {\n const result = callback(feature);\n if (result) {\n return result;\n }\n }\n }\n );\n }\n\n /**\n * Get the features collection associated with this source. Will be `null`\n * unless the source was configured with `useSpatialIndex` set to `false`, or\n * with an {@link module:ol/Collection~Collection} as `features`.\n * @return {Collection>|null} The collection of features.\n * @api\n */\n getFeaturesCollection() {\n return this.featuresCollection_;\n }\n\n /**\n * Get a snapshot of the features currently on the source in random order. The returned array\n * is a copy, the features are references to the features in the source.\n * @return {Array>} Features.\n * @api\n */\n getFeatures() {\n let features;\n if (this.featuresCollection_) {\n features = this.featuresCollection_.getArray().slice(0);\n } else if (this.featuresRtree_) {\n features = this.featuresRtree_.getAll();\n if (!isEmpty(this.nullGeometryFeatures_)) {\n extend(features, Object.values(this.nullGeometryFeatures_));\n }\n }\n return /** @type {Array>} */ (\n features\n );\n }\n\n /**\n * Get all features whose geometry intersects the provided coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n * @return {Array>} Features.\n * @api\n */\n getFeaturesAtCoordinate(coordinate) {\n const features = [];\n this.forEachFeatureAtCoordinateDirect(coordinate, function (feature) {\n features.push(feature);\n });\n return features;\n }\n\n /**\n * Get all features whose bounding box intersects the provided extent. Note that this returns an array of\n * all features intersecting the given extent in random order (so it may include\n * features whose geometries do not intersect the extent).\n *\n * When `useSpatialIndex` is set to false, this method will return all\n * features.\n *\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {import(\"../proj/Projection.js\").default} [projection] Include features\n * where `extent` exceeds the x-axis bounds of `projection` and wraps around the world.\n * @return {Array>} Features.\n * @api\n */\n getFeaturesInExtent(extent, projection) {\n if (this.featuresRtree_) {\n const multiWorld = projection && projection.canWrapX() && this.getWrapX();\n\n if (!multiWorld) {\n return this.featuresRtree_.getInExtent(extent);\n }\n\n const extents = wrapAndSliceX(extent, projection);\n\n return [].concat(\n ...extents.map((anExtent) => this.featuresRtree_.getInExtent(anExtent))\n );\n } else if (this.featuresCollection_) {\n return this.featuresCollection_.getArray().slice(0);\n }\n return [];\n }\n\n /**\n * Get the closest feature to the provided coordinate.\n *\n * This method is not available when the source is configured with\n * `useSpatialIndex` set to `false`.\n * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {function(import(\"../Feature.js\").default):boolean} [filter] Feature filter function.\n * The filter function will receive one argument, the {@link module:ol/Feature~Feature feature}\n * and it should return a boolean value. By default, no filtering is made.\n * @return {import(\"../Feature.js\").default} Closest feature.\n * @api\n */\n getClosestFeatureToCoordinate(coordinate, filter) {\n // Find the closest feature using branch and bound. We start searching an\n // infinite extent, and find the distance from the first feature found. This\n // becomes the closest feature. We then compute a smaller extent which any\n // closer feature must intersect. We continue searching with this smaller\n // extent, trying to find a closer feature. Every time we find a closer\n // feature, we update the extent being searched so that any even closer\n // feature must intersect it. We continue until we run out of features.\n const x = coordinate[0];\n const y = coordinate[1];\n let closestFeature = null;\n const closestPoint = [NaN, NaN];\n let minSquaredDistance = Infinity;\n const extent = [-Infinity, -Infinity, Infinity, Infinity];\n filter = filter ? filter : TRUE;\n this.featuresRtree_.forEachInExtent(\n extent,\n /**\n * @param {import(\"../Feature.js\").default} feature Feature.\n */\n function (feature) {\n if (filter(feature)) {\n const geometry = feature.getGeometry();\n const previousMinSquaredDistance = minSquaredDistance;\n minSquaredDistance = geometry.closestPointXY(\n x,\n y,\n closestPoint,\n minSquaredDistance\n );\n if (minSquaredDistance < previousMinSquaredDistance) {\n closestFeature = feature;\n // This is sneaky. Reduce the extent that it is currently being\n // searched while the R-Tree traversal using this same extent object\n // is still in progress. This is safe because the new extent is\n // strictly contained by the old extent.\n const minDistance = Math.sqrt(minSquaredDistance);\n extent[0] = x - minDistance;\n extent[1] = y - minDistance;\n extent[2] = x + minDistance;\n extent[3] = y + minDistance;\n }\n }\n }\n );\n return closestFeature;\n }\n\n /**\n * Get the extent of the features currently in the source.\n *\n * This method is not available when the source is configured with\n * `useSpatialIndex` set to `false`.\n * @param {import(\"../extent.js\").Extent} [extent] Destination extent. If provided, no new extent\n * will be created. Instead, that extent's coordinates will be overwritten.\n * @return {import(\"../extent.js\").Extent} Extent.\n * @api\n */\n getExtent(extent) {\n return this.featuresRtree_.getExtent(extent);\n }\n\n /**\n * Get a feature by its identifier (the value returned by feature.getId()).\n * Note that the index treats string and numeric identifiers as the same. So\n * `source.getFeatureById(2)` will return a feature with id `'2'` or `2`.\n *\n * @param {string|number} id Feature identifier.\n * @return {import(\"../Feature.js\").default|null} The feature (or `null` if not found).\n * @api\n */\n getFeatureById(id) {\n const feature = this.idIndex_[id.toString()];\n return feature !== undefined ? feature : null;\n }\n\n /**\n * Get a feature by its internal unique identifier (using `getUid`).\n *\n * @param {string} uid Feature identifier.\n * @return {import(\"../Feature.js\").default|null} The feature (or `null` if not found).\n */\n getFeatureByUid(uid) {\n const feature = this.uidIndex_[uid];\n return feature !== undefined ? feature : null;\n }\n\n /**\n * Get the format associated with this source.\n *\n * @return {import(\"../format/Feature.js\").default|undefined} The feature format.\n * @api\n */\n getFormat() {\n return this.format_;\n }\n\n /**\n * @return {boolean} The source can have overlapping geometries.\n */\n getOverlaps() {\n return this.overlaps_;\n }\n\n /**\n * Get the url associated with this source.\n *\n * @return {string|import(\"../featureloader.js\").FeatureUrlFunction|undefined} The url.\n * @api\n */\n getUrl() {\n return this.url_;\n }\n\n /**\n * @param {Event} event Event.\n * @private\n */\n handleFeatureChange_(event) {\n const feature = /** @type {import(\"../Feature.js\").default} */ (\n event.target\n );\n const featureKey = getUid(feature);\n const geometry = feature.getGeometry();\n if (!geometry) {\n if (!(featureKey in this.nullGeometryFeatures_)) {\n if (this.featuresRtree_) {\n this.featuresRtree_.remove(feature);\n }\n this.nullGeometryFeatures_[featureKey] = feature;\n }\n } else {\n const extent = geometry.getExtent();\n if (featureKey in this.nullGeometryFeatures_) {\n delete this.nullGeometryFeatures_[featureKey];\n if (this.featuresRtree_) {\n this.featuresRtree_.insert(extent, feature);\n }\n } else {\n if (this.featuresRtree_) {\n this.featuresRtree_.update(extent, feature);\n }\n }\n }\n const id = feature.getId();\n if (id !== undefined) {\n const sid = id.toString();\n if (this.idIndex_[sid] !== feature) {\n this.removeFromIdIndex_(feature);\n this.idIndex_[sid] = feature;\n }\n } else {\n this.removeFromIdIndex_(feature);\n this.uidIndex_[featureKey] = feature;\n }\n this.changed();\n this.dispatchEvent(\n new VectorSourceEvent(VectorEventType.CHANGEFEATURE, feature)\n );\n }\n\n /**\n * Returns true if the feature is contained within the source.\n * @param {import(\"../Feature.js\").default} feature Feature.\n * @return {boolean} Has feature.\n * @api\n */\n hasFeature(feature) {\n const id = feature.getId();\n if (id !== undefined) {\n return id in this.idIndex_;\n }\n return getUid(feature) in this.uidIndex_;\n }\n\n /**\n * @return {boolean} Is empty.\n */\n isEmpty() {\n if (this.featuresRtree_) {\n return (\n this.featuresRtree_.isEmpty() && isEmpty(this.nullGeometryFeatures_)\n );\n }\n if (this.featuresCollection_) {\n return this.featuresCollection_.getLength() === 0;\n }\n return true;\n }\n\n /**\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n */\n loadFeatures(extent, resolution, projection) {\n const loadedExtentsRtree = this.loadedExtentsRtree_;\n const extentsToLoad = this.strategy_(extent, resolution, projection);\n for (let i = 0, ii = extentsToLoad.length; i < ii; ++i) {\n const extentToLoad = extentsToLoad[i];\n const alreadyLoaded = loadedExtentsRtree.forEachInExtent(\n extentToLoad,\n /**\n * @param {{extent: import(\"../extent.js\").Extent}} object Object.\n * @return {boolean} Contains.\n */\n function (object) {\n return containsExtent(object.extent, extentToLoad);\n }\n );\n if (!alreadyLoaded) {\n ++this.loadingExtentsCount_;\n this.dispatchEvent(\n new VectorSourceEvent(VectorEventType.FEATURESLOADSTART)\n );\n this.loader_.call(\n this,\n extentToLoad,\n resolution,\n projection,\n (features) => {\n --this.loadingExtentsCount_;\n this.dispatchEvent(\n new VectorSourceEvent(\n VectorEventType.FEATURESLOADEND,\n undefined,\n features\n )\n );\n },\n () => {\n --this.loadingExtentsCount_;\n this.dispatchEvent(\n new VectorSourceEvent(VectorEventType.FEATURESLOADERROR)\n );\n }\n );\n loadedExtentsRtree.insert(extentToLoad, {extent: extentToLoad.slice()});\n }\n }\n this.loading =\n this.loader_.length < 4 ? false : this.loadingExtentsCount_ > 0;\n }\n\n refresh() {\n this.clear(true);\n this.loadedExtentsRtree_.clear();\n super.refresh();\n }\n\n /**\n * Remove an extent from the list of loaded extents.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @api\n */\n removeLoadedExtent(extent) {\n const loadedExtentsRtree = this.loadedExtentsRtree_;\n let obj;\n loadedExtentsRtree.forEachInExtent(extent, function (object) {\n if (equals(object.extent, extent)) {\n obj = object;\n return true;\n }\n });\n if (obj) {\n loadedExtentsRtree.remove(obj);\n }\n }\n\n /**\n * Remove a single feature from the source. If you want to remove all features\n * at once, use the {@link module:ol/source/Vector~VectorSource#clear #clear()} method\n * instead.\n * @param {import(\"../Feature.js\").default} feature Feature to remove.\n * @api\n */\n removeFeature(feature) {\n if (!feature) {\n return;\n }\n const featureKey = getUid(feature);\n if (featureKey in this.nullGeometryFeatures_) {\n delete this.nullGeometryFeatures_[featureKey];\n } else {\n if (this.featuresRtree_) {\n this.featuresRtree_.remove(feature);\n }\n }\n const result = this.removeFeatureInternal(feature);\n if (result) {\n this.changed();\n }\n }\n\n /**\n * Remove feature without firing a `change` event.\n * @param {import(\"../Feature.js\").default} feature Feature.\n * @return {import(\"../Feature.js\").default|undefined} The removed feature\n * (or undefined if the feature was not found).\n * @protected\n */\n removeFeatureInternal(feature) {\n const featureKey = getUid(feature);\n const featureChangeKeys = this.featureChangeKeys_[featureKey];\n if (!featureChangeKeys) {\n return;\n }\n featureChangeKeys.forEach(unlistenByKey);\n delete this.featureChangeKeys_[featureKey];\n const id = feature.getId();\n if (id !== undefined) {\n delete this.idIndex_[id.toString()];\n }\n delete this.uidIndex_[featureKey];\n this.dispatchEvent(\n new VectorSourceEvent(VectorEventType.REMOVEFEATURE, feature)\n );\n return feature;\n }\n\n /**\n * Remove a feature from the id index. Called internally when the feature id\n * may have changed.\n * @param {import(\"../Feature.js\").default} feature The feature.\n * @return {boolean} Removed the feature from the index.\n * @private\n */\n removeFromIdIndex_(feature) {\n let removed = false;\n for (const id in this.idIndex_) {\n if (this.idIndex_[id] === feature) {\n delete this.idIndex_[id];\n removed = true;\n break;\n }\n }\n return removed;\n }\n\n /**\n * Set the new loader of the source. The next render cycle will use the\n * new loader.\n * @param {import(\"../featureloader.js\").FeatureLoader} loader The loader to set.\n * @api\n */\n setLoader(loader) {\n this.loader_ = loader;\n }\n\n /**\n * Points the source to a new url. The next render cycle will use the new url.\n * @param {string|import(\"../featureloader.js\").FeatureUrlFunction} url Url.\n * @api\n */\n setUrl(url) {\n assert(this.format_, 7); // `format` must be set when `url` is set\n this.url_ = url;\n this.setLoader(xhr(url, this.format_));\n }\n}\n\nexport default VectorSource;\n","/**\n * @module ol/source/Cluster\n */\n\nimport EventType from '../events/EventType.js';\nimport Feature from '../Feature.js';\nimport Point from '../geom/Point.js';\nimport VectorSource from './Vector.js';\nimport {add as addCoordinate, scale as scaleCoordinate} from '../coordinate.js';\nimport {assert} from '../asserts.js';\nimport {\n buffer,\n createEmpty,\n createOrUpdateFromCoordinate,\n getCenter,\n} from '../extent.js';\nimport {getUid} from '../util.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {number} [distance=20] Distance in pixels within which features will\n * be clustered together.\n * @property {number} [minDistance=0] Minimum distance in pixels between clusters.\n * Will be capped at the configured distance.\n * By default no minimum distance is guaranteed. This config can be used to avoid\n * overlapping icons. As a tradoff, the cluster feature's position will no longer be\n * the center of all its features.\n * @property {function(Feature):Point} [geometryFunction]\n * Function that takes an {@link module:ol/Feature~Feature} as argument and returns an\n * {@link module:ol/geom/Point~Point} as cluster calculation point for the feature. When a\n * feature should not be considered for clustering, the function should return\n * `null`. The default, which works when the underlying source contains point\n * features only, is\n * ```js\n * function(feature) {\n * return feature.getGeometry();\n * }\n * ```\n * See {@link module:ol/geom/Polygon~Polygon#getInteriorPoint} for a way to get a cluster\n * calculation point for polygons.\n * @property {function(Point, Array):Feature} [createCluster]\n * Function that takes the cluster's center {@link module:ol/geom/Point~Point} and an array\n * of {@link module:ol/Feature~Feature} included in this cluster. Must return a\n * {@link module:ol/Feature~Feature} that will be used to render. Default implementation is:\n * ```js\n * function(point, features) {\n * return new Feature({\n * geometry: point,\n * features: features\n * });\n * }\n * ```\n * @property {VectorSource} [source=null] Source.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n */\n\n/**\n * @classdesc\n * Layer source to cluster vector data. Works out of the box with point\n * geometries. For other geometry types, or if not all geometries should be\n * considered for clustering, a custom `geometryFunction` can be defined.\n *\n * If the instance is disposed without also disposing the underlying\n * source `setSource(null)` has to be called to remove the listener reference\n * from the wrapped source.\n * @api\n */\nclass Cluster extends VectorSource {\n /**\n * @param {Options} options Cluster options.\n */\n constructor(options) {\n super({\n attributions: options.attributions,\n wrapX: options.wrapX,\n });\n\n /**\n * @type {number|undefined}\n * @protected\n */\n this.resolution = undefined;\n\n /**\n * @type {number}\n * @protected\n */\n this.distance = options.distance !== undefined ? options.distance : 20;\n\n /**\n * @type {number}\n * @protected\n */\n this.minDistance = options.minDistance || 0;\n\n /**\n * @type {number}\n * @protected\n */\n this.interpolationRatio = 0;\n\n /**\n * @type {Array}\n * @protected\n */\n this.features = [];\n\n /**\n * @param {Feature} feature Feature.\n * @return {Point} Cluster calculation point.\n * @protected\n */\n this.geometryFunction =\n options.geometryFunction ||\n function (feature) {\n const geometry = /** @type {Point} */ (feature.getGeometry());\n assert(geometry.getType() == 'Point', 10); // The default `geometryFunction` can only handle `Point` geometries\n return geometry;\n };\n\n /**\n * @type {function(Point, Array):Feature}\n * @private\n */\n this.createCustomCluster_ = options.createCluster;\n\n /**\n * @type {VectorSource|null}\n * @protected\n */\n this.source = null;\n\n /**\n * @private\n */\n this.boundRefresh_ = this.refresh.bind(this);\n\n this.updateDistance(this.distance, this.minDistance);\n this.setSource(options.source || null);\n }\n\n /**\n * Remove all features from the source.\n * @param {boolean} [fast] Skip dispatching of {@link module:ol/source/VectorEventType~VectorEventType#removefeature} events.\n * @api\n */\n clear(fast) {\n this.features.length = 0;\n super.clear(fast);\n }\n\n /**\n * Get the distance in pixels between clusters.\n * @return {number} Distance.\n * @api\n */\n getDistance() {\n return this.distance;\n }\n\n /**\n * Get a reference to the wrapped source.\n * @return {VectorSource|null} Source.\n * @api\n */\n getSource() {\n return this.source;\n }\n\n /**\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n */\n loadFeatures(extent, resolution, projection) {\n this.source.loadFeatures(extent, resolution, projection);\n if (resolution !== this.resolution) {\n this.resolution = resolution;\n this.refresh();\n }\n }\n\n /**\n * Set the distance within which features will be clusterd together.\n * @param {number} distance The distance in pixels.\n * @api\n */\n setDistance(distance) {\n this.updateDistance(distance, this.minDistance);\n }\n\n /**\n * Set the minimum distance between clusters. Will be capped at the\n * configured distance.\n * @param {number} minDistance The minimum distance in pixels.\n * @api\n */\n setMinDistance(minDistance) {\n this.updateDistance(this.distance, minDistance);\n }\n\n /**\n * The configured minimum distance between clusters.\n * @return {number} The minimum distance in pixels.\n * @api\n */\n getMinDistance() {\n return this.minDistance;\n }\n\n /**\n * Replace the wrapped source.\n * @param {VectorSource|null} source The new source for this instance.\n * @api\n */\n setSource(source) {\n if (this.source) {\n this.source.removeEventListener(EventType.CHANGE, this.boundRefresh_);\n }\n this.source = source;\n if (source) {\n source.addEventListener(EventType.CHANGE, this.boundRefresh_);\n }\n this.refresh();\n }\n\n /**\n * Handle the source changing.\n */\n refresh() {\n this.clear();\n this.cluster();\n this.addFeatures(this.features);\n }\n\n /**\n * Update the distances and refresh the source if necessary.\n * @param {number} distance The new distance.\n * @param {number} minDistance The new minimum distance.\n */\n updateDistance(distance, minDistance) {\n const ratio =\n distance === 0 ? 0 : Math.min(minDistance, distance) / distance;\n const changed =\n distance !== this.distance || this.interpolationRatio !== ratio;\n this.distance = distance;\n this.minDistance = minDistance;\n this.interpolationRatio = ratio;\n if (changed) {\n this.refresh();\n }\n }\n\n /**\n * @protected\n */\n cluster() {\n if (this.resolution === undefined || !this.source) {\n return;\n }\n const extent = createEmpty();\n const mapDistance = this.distance * this.resolution;\n const features = this.source.getFeatures();\n\n /** @type {Object} */\n const clustered = {};\n\n for (let i = 0, ii = features.length; i < ii; i++) {\n const feature = features[i];\n if (!(getUid(feature) in clustered)) {\n const geometry = this.geometryFunction(feature);\n if (geometry) {\n const coordinates = geometry.getCoordinates();\n createOrUpdateFromCoordinate(coordinates, extent);\n buffer(extent, mapDistance, extent);\n\n const neighbors = this.source\n .getFeaturesInExtent(extent)\n .filter(function (neighbor) {\n const uid = getUid(neighbor);\n if (uid in clustered) {\n return false;\n }\n clustered[uid] = true;\n return true;\n });\n this.features.push(this.createCluster(neighbors, extent));\n }\n }\n }\n }\n\n /**\n * @param {Array} features Features\n * @param {import(\"../extent.js\").Extent} extent The searched extent for these features.\n * @return {Feature} The cluster feature.\n * @protected\n */\n createCluster(features, extent) {\n const centroid = [0, 0];\n for (let i = features.length - 1; i >= 0; --i) {\n const geometry = this.geometryFunction(features[i]);\n if (geometry) {\n addCoordinate(centroid, geometry.getCoordinates());\n } else {\n features.splice(i, 1);\n }\n }\n scaleCoordinate(centroid, 1 / features.length);\n const searchCenter = getCenter(extent);\n const ratio = this.interpolationRatio;\n const geometry = new Point([\n centroid[0] * (1 - ratio) + searchCenter[0] * ratio,\n centroid[1] * (1 - ratio) + searchCenter[1] * ratio,\n ]);\n if (this.createCustomCluster_) {\n return this.createCustomCluster_(geometry, features);\n }\n return new Feature({\n geometry,\n features,\n });\n }\n}\n\nexport default Cluster;\n","/**\n * @module ol/reproj/DataTile\n */\nimport {ERROR_THRESHOLD} from './common.js';\n\nimport DataTile, {asArrayLike, asImageLike, toArray} from '../DataTile.js';\nimport EventType from '../events/EventType.js';\nimport TileState from '../TileState.js';\nimport Triangulation from './Triangulation.js';\nimport {\n calculateSourceExtentResolution,\n canvasPool,\n render as renderReprojected,\n} from '../reproj.js';\nimport {clamp} from '../math.js';\nimport {createCanvasContext2D, releaseCanvas} from '../dom.js';\nimport {getArea, getIntersection} from '../extent.js';\nimport {listen, unlistenByKey} from '../events.js';\n\n/**\n * @typedef {function(number, number, number, number) : import(\"../DataTile.js\").default} TileGetter\n */\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../proj/Projection.js\").default} sourceProj Source projection.\n * @property {import(\"../tilegrid/TileGrid.js\").default} sourceTileGrid Source tile grid.\n * @property {import(\"../proj/Projection.js\").default} targetProj Target projection.\n * @property {import(\"../tilegrid/TileGrid.js\").default} targetTileGrid Target tile grid.\n * @property {import(\"../tilecoord.js\").TileCoord} tileCoord Coordinate of the tile.\n * @property {import(\"../tilecoord.js\").TileCoord} [wrappedTileCoord] Coordinate of the tile wrapped in X.\n * @property {number} pixelRatio Pixel ratio.\n * @property {number} gutter Gutter of the source tiles.\n * @property {TileGetter} getTileFunction Function returning source tiles (z, x, y, pixelRatio).\n * @property {boolean} [interpolate=false] Use interpolated values when resampling. By default,\n * the nearest neighbor is used when resampling.\n * @property {number} [errorThreshold] Acceptable reprojection error (in px).\n * @property {number} [transition=250] A duration for tile opacity\n * transitions in milliseconds. A duration of 0 disables the opacity transition.\n */\n\n/**\n * @classdesc\n * Class encapsulating single reprojected data tile.\n * See {@link module:ol/source/DataTile~DataTileSource}.\n *\n */\nclass ReprojDataTile extends DataTile {\n /**\n * @param {Options} options Tile options.\n */\n constructor(options) {\n super({\n tileCoord: options.tileCoord,\n loader: () => Promise.resolve(new Uint8Array(4)),\n interpolate: options.interpolate,\n transition: options.transition,\n });\n\n /**\n * @private\n * @type {number}\n */\n this.pixelRatio_ = options.pixelRatio;\n\n /**\n * @private\n * @type {number}\n */\n this.gutter_ = options.gutter;\n\n /**\n * @type {import(\"../DataTile.js\").Data}\n * @private\n */\n this.reprojData_ = null;\n\n /**\n * @type {Error}\n * @private\n */\n this.reprojError_ = null;\n\n /**\n * @type {import('../size.js').Size}\n * @private\n */\n this.reprojSize_ = undefined;\n\n /**\n * @private\n * @type {import(\"../tilegrid/TileGrid.js\").default}\n */\n this.sourceTileGrid_ = options.sourceTileGrid;\n\n /**\n * @private\n * @type {import(\"../tilegrid/TileGrid.js\").default}\n */\n this.targetTileGrid_ = options.targetTileGrid;\n\n /**\n * @private\n * @type {import(\"../tilecoord.js\").TileCoord}\n */\n this.wrappedTileCoord_ = options.wrappedTileCoord || options.tileCoord;\n\n /**\n * @private\n * @type {!Array}\n */\n this.sourceTiles_ = [];\n\n /**\n * @private\n * @type {?Array}\n */\n this.sourcesListenerKeys_ = null;\n\n /**\n * @private\n * @type {number}\n */\n this.sourceZ_ = 0;\n\n const targetExtent = this.targetTileGrid_.getTileCoordExtent(\n this.wrappedTileCoord_\n );\n const maxTargetExtent = this.targetTileGrid_.getExtent();\n let maxSourceExtent = this.sourceTileGrid_.getExtent();\n\n const limitedTargetExtent = maxTargetExtent\n ? getIntersection(targetExtent, maxTargetExtent)\n : targetExtent;\n\n if (getArea(limitedTargetExtent) === 0) {\n // Tile is completely outside range -> EMPTY\n // TODO: is it actually correct that the source even creates the tile ?\n this.state = TileState.EMPTY;\n return;\n }\n\n const sourceProj = options.sourceProj;\n const sourceProjExtent = sourceProj.getExtent();\n if (sourceProjExtent) {\n if (!maxSourceExtent) {\n maxSourceExtent = sourceProjExtent;\n } else {\n maxSourceExtent = getIntersection(maxSourceExtent, sourceProjExtent);\n }\n }\n\n const targetResolution = this.targetTileGrid_.getResolution(\n this.wrappedTileCoord_[0]\n );\n\n const targetProj = options.targetProj;\n const sourceResolution = calculateSourceExtentResolution(\n sourceProj,\n targetProj,\n limitedTargetExtent,\n targetResolution\n );\n\n if (!isFinite(sourceResolution) || sourceResolution <= 0) {\n // invalid sourceResolution -> EMPTY\n // probably edges of the projections when no extent is defined\n this.state = TileState.EMPTY;\n return;\n }\n\n const errorThresholdInPixels =\n options.errorThreshold !== undefined\n ? options.errorThreshold\n : ERROR_THRESHOLD;\n\n /**\n * @private\n * @type {!import(\"./Triangulation.js\").default}\n */\n this.triangulation_ = new Triangulation(\n sourceProj,\n targetProj,\n limitedTargetExtent,\n maxSourceExtent,\n sourceResolution * errorThresholdInPixels,\n targetResolution\n );\n\n if (this.triangulation_.getTriangles().length === 0) {\n // no valid triangles -> EMPTY\n this.state = TileState.EMPTY;\n return;\n }\n\n this.sourceZ_ = this.sourceTileGrid_.getZForResolution(sourceResolution);\n let sourceExtent = this.triangulation_.calculateSourceExtent();\n\n if (maxSourceExtent) {\n if (sourceProj.canWrapX()) {\n sourceExtent[1] = clamp(\n sourceExtent[1],\n maxSourceExtent[1],\n maxSourceExtent[3]\n );\n sourceExtent[3] = clamp(\n sourceExtent[3],\n maxSourceExtent[1],\n maxSourceExtent[3]\n );\n } else {\n sourceExtent = getIntersection(sourceExtent, maxSourceExtent);\n }\n }\n\n if (!getArea(sourceExtent)) {\n this.state = TileState.EMPTY;\n } else {\n const sourceRange = this.sourceTileGrid_.getTileRangeForExtentAndZ(\n sourceExtent,\n this.sourceZ_\n );\n const getTile = options.getTileFunction;\n for (let srcX = sourceRange.minX; srcX <= sourceRange.maxX; srcX++) {\n for (let srcY = sourceRange.minY; srcY <= sourceRange.maxY; srcY++) {\n const tile = getTile(this.sourceZ_, srcX, srcY, this.pixelRatio_);\n if (tile) {\n this.sourceTiles_.push(tile);\n }\n }\n }\n\n if (this.sourceTiles_.length === 0) {\n this.state = TileState.EMPTY;\n }\n }\n }\n\n /**\n * Get the tile size.\n * @return {import('../size.js').Size} Tile size.\n */\n getSize() {\n return this.reprojSize_;\n }\n\n /**\n * Get the data for the tile.\n * @return {import(\"../DataTile.js\").Data} Tile data.\n */\n getData() {\n return this.reprojData_;\n }\n\n /**\n * Get any loading error.\n * @return {Error} Loading error.\n */\n getError() {\n return this.reprojError_;\n }\n\n /**\n * @private\n */\n reproject_() {\n const dataSources = [];\n this.sourceTiles_.forEach((tile) => {\n if (!tile || tile.getState() !== TileState.LOADED) {\n return;\n }\n const size = tile.getSize();\n const gutter = this.gutter_;\n /**\n * @type {import(\"../DataTile.js\").ArrayLike}\n */\n let tileData;\n const arrayData = asArrayLike(tile.getData());\n if (arrayData) {\n tileData = arrayData;\n } else {\n tileData = toArray(asImageLike(tile.getData()));\n }\n const pixelSize = [size[0] + 2 * gutter, size[1] + 2 * gutter];\n const isFloat = tileData instanceof Float32Array;\n const pixelCount = pixelSize[0] * pixelSize[1];\n const DataType = isFloat ? Float32Array : Uint8Array;\n const tileDataR = new DataType(tileData.buffer);\n const bytesPerElement = DataType.BYTES_PER_ELEMENT;\n const bytesPerPixel = (bytesPerElement * tileDataR.length) / pixelCount;\n const bytesPerRow = tileDataR.byteLength / pixelSize[1];\n const bandCount = Math.floor(\n bytesPerRow / bytesPerElement / pixelSize[0]\n );\n const packedLength = pixelCount * bandCount;\n let packedData = tileDataR;\n if (tileDataR.length !== packedLength) {\n packedData = new DataType(packedLength);\n let dataIndex = 0;\n let rowOffset = 0;\n const colCount = pixelSize[0] * bandCount;\n for (let rowIndex = 0; rowIndex < pixelSize[1]; ++rowIndex) {\n for (let colIndex = 0; colIndex < colCount; ++colIndex) {\n packedData[dataIndex++] = tileDataR[rowOffset + colIndex];\n }\n rowOffset += bytesPerRow / bytesPerElement;\n }\n }\n dataSources.push({\n extent: this.sourceTileGrid_.getTileCoordExtent(tile.tileCoord),\n data: new Uint8Array(packedData.buffer),\n dataType: DataType,\n bytesPerPixel: bytesPerPixel,\n pixelSize: pixelSize,\n });\n });\n this.sourceTiles_.length = 0;\n\n if (dataSources.length === 0) {\n this.state = TileState.ERROR;\n } else {\n const z = this.wrappedTileCoord_[0];\n const size = this.targetTileGrid_.getTileSize(z);\n const targetWidth = typeof size === 'number' ? size : size[0];\n const targetHeight = typeof size === 'number' ? size : size[1];\n const targetResolution = this.targetTileGrid_.getResolution(z);\n const sourceResolution = this.sourceTileGrid_.getResolution(\n this.sourceZ_\n );\n\n const targetExtent = this.targetTileGrid_.getTileCoordExtent(\n this.wrappedTileCoord_\n );\n\n let dataR, dataU;\n\n const bytesPerPixel = dataSources[0].bytesPerPixel;\n\n const reprojs = Math.ceil(bytesPerPixel / 3);\n for (let reproj = reprojs - 1; reproj >= 0; --reproj) {\n const sources = [];\n for (let i = 0, len = dataSources.length; i < len; ++i) {\n const dataSource = dataSources[i];\n const buffer = dataSource.data;\n const pixelSize = dataSource.pixelSize;\n const width = pixelSize[0];\n const height = pixelSize[1];\n const context = createCanvasContext2D(width, height, canvasPool);\n const imageData = context.createImageData(width, height);\n const data = imageData.data;\n let offset = reproj * 3;\n for (let j = 0, len = data.length; j < len; j += 4) {\n data[j] = buffer[offset];\n data[j + 1] = buffer[offset + 1];\n data[j + 2] = buffer[offset + 2];\n data[j + 3] = 255;\n offset += bytesPerPixel;\n }\n context.putImageData(imageData, 0, 0);\n sources.push({\n extent: dataSource.extent,\n image: context.canvas,\n });\n }\n\n const canvas = renderReprojected(\n targetWidth,\n targetHeight,\n this.pixelRatio_,\n sourceResolution,\n this.sourceTileGrid_.getExtent(),\n targetResolution,\n targetExtent,\n this.triangulation_,\n sources,\n this.gutter_,\n false,\n false\n );\n\n for (let i = 0, len = sources.length; i < len; ++i) {\n const canvas = sources[i].image;\n const context = canvas.getContext('2d');\n releaseCanvas(context);\n canvasPool.push(context.canvas);\n }\n\n const context = canvas.getContext('2d');\n const imageData = context.getImageData(\n 0,\n 0,\n canvas.width,\n canvas.height\n );\n\n releaseCanvas(context);\n canvasPool.push(canvas);\n\n if (!dataR) {\n dataU = new Uint8Array(\n bytesPerPixel * imageData.width * imageData.height\n );\n dataR = new dataSources[0].dataType(dataU.buffer);\n }\n\n const data = imageData.data;\n let offset = reproj * 3;\n for (let i = 0, len = data.length; i < len; i += 4) {\n if (data[i + 3] === 255) {\n dataU[offset] = data[i];\n dataU[offset + 1] = data[i + 1];\n dataU[offset + 2] = data[i + 2];\n } else {\n dataU[offset] = 0;\n dataU[offset + 1] = 0;\n dataU[offset + 2] = 0;\n }\n offset += bytesPerPixel;\n }\n }\n\n this.reprojData_ = dataR;\n this.reprojSize_ = [\n Math.round(targetWidth * this.pixelRatio_),\n Math.round(targetHeight * this.pixelRatio_),\n ];\n this.state = TileState.LOADED;\n }\n this.changed();\n }\n\n /**\n * Load not yet loaded URI.\n */\n load() {\n if (this.state !== TileState.IDLE && this.state !== TileState.ERROR) {\n return;\n }\n this.state = TileState.LOADING;\n this.changed();\n\n let leftToLoad = 0;\n\n this.sourcesListenerKeys_ = [];\n this.sourceTiles_.forEach((tile) => {\n const state = tile.getState();\n if (state !== TileState.IDLE && state !== TileState.LOADING) {\n return;\n }\n leftToLoad++;\n\n const sourceListenKey = listen(\n tile,\n EventType.CHANGE,\n function () {\n const state = tile.getState();\n if (\n state == TileState.LOADED ||\n state == TileState.ERROR ||\n state == TileState.EMPTY\n ) {\n unlistenByKey(sourceListenKey);\n leftToLoad--;\n if (leftToLoad === 0) {\n this.unlistenSources_();\n this.reproject_();\n }\n }\n },\n this\n );\n this.sourcesListenerKeys_.push(sourceListenKey);\n });\n\n if (leftToLoad === 0) {\n setTimeout(this.reproject_.bind(this), 0);\n } else {\n this.sourceTiles_.forEach(function (tile) {\n const state = tile.getState();\n if (state == TileState.IDLE) {\n tile.load();\n }\n });\n }\n }\n\n /**\n * @private\n */\n unlistenSources_() {\n this.sourcesListenerKeys_.forEach(unlistenByKey);\n this.sourcesListenerKeys_ = null;\n }\n}\n\nexport default ReprojDataTile;\n","/**\n * @module ol/source/DataTile\n */\nimport DataTile from '../DataTile.js';\nimport EventType from '../events/EventType.js';\nimport ReprojDataTile from '../reproj/DataTile.js';\nimport TileCache from '../TileCache.js';\nimport TileEventType from './TileEventType.js';\nimport TileSource, {TileSourceEvent} from './Tile.js';\nimport TileState from '../TileState.js';\nimport {\n createXYZ,\n extentFromProjection,\n getForProjection as getTileGridForProjection,\n} from '../tilegrid.js';\nimport {equivalent, get as getProjection} from '../proj.js';\nimport {getKeyZXY} from '../tilecoord.js';\nimport {getUid} from '../util.js';\nimport {toPromise} from '../functions.js';\nimport {toSize} from '../size.js';\n\n/**\n * Data tile loading function. The function is called with z, x, and y tile coordinates and\n * returns {@link import(\"../DataTile.js\").Data data} for a tile or a promise for the same.\n * @typedef {function(number, number, number) : (import(\"../DataTile.js\").Data|Promise)} Loader\n */\n\n/**\n * @typedef {Object} Options\n * @property {Loader} [loader] Data loader. Called with z, x, and y tile coordinates.\n * Returns {@link import(\"../DataTile.js\").Data data} for a tile or a promise for the same.\n * For loaders that generate images, the promise should not resolve until the image is loaded.\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {number} [maxZoom=42] Optional max zoom level. Not used if `tileGrid` is provided.\n * @property {number} [minZoom=0] Optional min zoom level. Not used if `tileGrid` is provided.\n * @property {number|import(\"../size.js\").Size} [tileSize=[256, 256]] The pixel width and height of the source tiles.\n * This may be different than the rendered pixel size if a `tileGrid` is provided.\n * @property {number} [gutter=0] The size in pixels of the gutter around data tiles to ignore.\n * This allows artifacts of rendering at tile edges to be ignored.\n * Supported data should be wider and taller than the tile size by a value of `2 x gutter`.\n * @property {number} [maxResolution] Optional tile grid resolution at level zero. Not used if `tileGrid` is provided.\n * @property {import(\"../proj.js\").ProjectionLike} [projection='EPSG:3857'] Tile projection.\n * @property {import(\"../tilegrid/TileGrid.js\").default} [tileGrid] Tile grid.\n * @property {boolean} [opaque=false] Whether the layer is opaque.\n * @property {import(\"./Source.js\").State} [state] The source state.\n * @property {boolean} [wrapX=false] Render tiles beyond the antimeridian.\n * @property {number} [transition] Transition time when fading in new tiles (in miliseconds).\n * @property {number} [bandCount=4] Number of bands represented in the data.\n * @property {boolean} [interpolate=false] Use interpolated values when resampling. By default,\n * the nearest neighbor is used when resampling.\n */\n\n/**\n * @classdesc\n * A source for typed array data tiles.\n *\n * @fires import(\"./Tile.js\").TileSourceEvent\n * @api\n */\nclass DataTileSource extends TileSource {\n /**\n * @param {Options} options DataTile source options.\n */\n constructor(options) {\n const projection =\n options.projection === undefined ? 'EPSG:3857' : options.projection;\n\n let tileGrid = options.tileGrid;\n if (tileGrid === undefined && projection) {\n tileGrid = createXYZ({\n extent: extentFromProjection(projection),\n maxResolution: options.maxResolution,\n maxZoom: options.maxZoom,\n minZoom: options.minZoom,\n tileSize: options.tileSize,\n });\n }\n\n super({\n cacheSize: 0.1, // don't cache on the source\n attributions: options.attributions,\n attributionsCollapsible: options.attributionsCollapsible,\n projection: projection,\n tileGrid: tileGrid,\n opaque: options.opaque,\n state: options.state,\n wrapX: options.wrapX,\n transition: options.transition,\n interpolate: options.interpolate,\n });\n\n /**\n * @private\n * @type {number}\n */\n this.gutter_ = options.gutter !== undefined ? options.gutter : 0;\n\n /**\n * @private\n * @type {import('../size.js').Size|null}\n */\n this.tileSize_ = options.tileSize ? toSize(options.tileSize) : null;\n\n /**\n * @private\n * @type {Array|null}\n */\n this.tileSizes_ = null;\n\n /**\n * @private\n * @type {!Object}\n */\n this.tileLoadingKeys_ = {};\n\n /**\n * @private\n */\n this.loader_ = options.loader;\n\n this.handleTileChange_ = this.handleTileChange_.bind(this);\n\n /**\n * @type {number}\n */\n this.bandCount = options.bandCount === undefined ? 4 : options.bandCount; // assume RGBA if undefined\n\n /**\n * @private\n * @type {!Object}\n */\n this.tileGridForProjection_ = {};\n\n /**\n * @private\n * @type {!Object}\n */\n this.tileCacheForProjection_ = {};\n }\n\n /**\n * Set the source tile sizes. The length of the array is expected to match the number of\n * levels in the tile grid.\n * @protected\n * @param {Array} tileSizes An array of tile sizes.\n */\n setTileSizes(tileSizes) {\n this.tileSizes_ = tileSizes;\n }\n\n /**\n * Get the source tile size at the given zoom level. This may be different than the rendered tile\n * size.\n * @protected\n * @param {number} z Tile zoom level.\n * @return {import('../size.js').Size} The source tile size.\n */\n getTileSize(z) {\n if (this.tileSizes_) {\n return this.tileSizes_[z];\n }\n if (this.tileSize_) {\n return this.tileSize_;\n }\n const tileGrid = this.getTileGrid();\n return tileGrid ? toSize(tileGrid.getTileSize(z)) : [256, 256];\n }\n\n /**\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {number} Gutter.\n */\n getGutterForProjection(projection) {\n const thisProj = this.getProjection();\n if (!thisProj || equivalent(thisProj, projection)) {\n return this.gutter_;\n }\n\n return 0;\n }\n\n /**\n * @param {Loader} loader The data loader.\n * @protected\n */\n setLoader(loader) {\n this.loader_ = loader;\n }\n\n /**\n * @param {number} z Tile coordinate z.\n * @param {number} x Tile coordinate x.\n * @param {number} y Tile coordinate y.\n * @param {import(\"../proj/Projection.js\").default} targetProj The output projection.\n * @param {import(\"../proj/Projection.js\").default} sourceProj The input projection.\n * @return {!DataTile} Tile.\n */\n getReprojTile_(z, x, y, targetProj, sourceProj) {\n const cache = this.getTileCacheForProjection(targetProj);\n const tileCoordKey = getKeyZXY(z, x, y);\n if (cache.containsKey(tileCoordKey)) {\n const tile = cache.get(tileCoordKey);\n if (tile && tile.key == this.getKey()) {\n return tile;\n }\n }\n\n const tileGrid = this.getTileGrid();\n const reprojTilePixelRatio = Math.max.apply(\n null,\n tileGrid.getResolutions().map((r, z) => {\n const tileSize = toSize(tileGrid.getTileSize(z));\n const textureSize = this.getTileSize(z);\n return Math.max(\n textureSize[0] / tileSize[0],\n textureSize[1] / tileSize[1]\n );\n })\n );\n\n const sourceTileGrid = this.getTileGridForProjection(sourceProj);\n const targetTileGrid = this.getTileGridForProjection(targetProj);\n const tileCoord = [z, x, y];\n const wrappedTileCoord = this.getTileCoordForTileUrlFunction(\n tileCoord,\n targetProj\n );\n\n const options = Object.assign(\n {\n sourceProj,\n sourceTileGrid,\n targetProj,\n targetTileGrid,\n tileCoord,\n wrappedTileCoord,\n pixelRatio: reprojTilePixelRatio,\n gutter: this.getGutterForProjection(sourceProj),\n getTileFunction: (z, x, y, pixelRatio) =>\n this.getTile(z, x, y, pixelRatio, sourceProj),\n },\n this.tileOptions\n );\n const newTile = new ReprojDataTile(options);\n newTile.key = this.getKey();\n return newTile;\n }\n\n /**\n * @param {number} z Tile coordinate z.\n * @param {number} x Tile coordinate x.\n * @param {number} y Tile coordinate y.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {!DataTile} Tile.\n */\n getTile(z, x, y, pixelRatio, projection) {\n const sourceProjection = this.getProjection();\n if (\n sourceProjection &&\n projection &&\n !equivalent(sourceProjection, projection)\n ) {\n return this.getReprojTile_(z, x, y, projection, sourceProjection);\n }\n\n const size = this.getTileSize(z);\n const tileCoordKey = getKeyZXY(z, x, y);\n if (this.tileCache.containsKey(tileCoordKey)) {\n return this.tileCache.get(tileCoordKey);\n }\n\n const sourceLoader = this.loader_;\n\n function loader() {\n return toPromise(function () {\n return sourceLoader(z, x, y);\n });\n }\n\n const options = Object.assign(\n {\n tileCoord: [z, x, y],\n loader: loader,\n size: size,\n },\n this.tileOptions\n );\n\n const tile = new DataTile(options);\n tile.key = this.getKey();\n tile.addEventListener(EventType.CHANGE, this.handleTileChange_);\n\n this.tileCache.set(tileCoordKey, tile);\n return tile;\n }\n\n /**\n * Handle tile change events.\n * @param {import(\"../events/Event.js\").default} event Event.\n */\n handleTileChange_(event) {\n const tile = /** @type {import(\"../Tile.js\").default} */ (event.target);\n const uid = getUid(tile);\n const tileState = tile.getState();\n let type;\n if (tileState == TileState.LOADING) {\n this.tileLoadingKeys_[uid] = true;\n type = TileEventType.TILELOADSTART;\n } else if (uid in this.tileLoadingKeys_) {\n delete this.tileLoadingKeys_[uid];\n type =\n tileState == TileState.ERROR\n ? TileEventType.TILELOADERROR\n : tileState == TileState.LOADED\n ? TileEventType.TILELOADEND\n : undefined;\n }\n if (type) {\n this.dispatchEvent(new TileSourceEvent(type, tile));\n }\n }\n\n /**\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {!import(\"../tilegrid/TileGrid.js\").default} Tile grid.\n */\n getTileGridForProjection(projection) {\n const thisProj = this.getProjection();\n if (this.tileGrid && (!thisProj || equivalent(thisProj, projection))) {\n return this.tileGrid;\n }\n\n const projKey = getUid(projection);\n if (!(projKey in this.tileGridForProjection_)) {\n this.tileGridForProjection_[projKey] =\n getTileGridForProjection(projection);\n }\n return this.tileGridForProjection_[projKey];\n }\n\n /**\n * Sets the tile grid to use when reprojecting the tiles to the given\n * projection instead of the default tile grid for the projection.\n *\n * This can be useful when the default tile grid cannot be created\n * (e.g. projection has no extent defined) or\n * for optimization reasons (custom tile size, resolutions, ...).\n *\n * @param {import(\"../proj.js\").ProjectionLike} projection Projection.\n * @param {import(\"../tilegrid/TileGrid.js\").default} tilegrid Tile grid to use for the projection.\n * @api\n */\n setTileGridForProjection(projection, tilegrid) {\n const proj = getProjection(projection);\n if (proj) {\n const projKey = getUid(proj);\n if (!(projKey in this.tileGridForProjection_)) {\n this.tileGridForProjection_[projKey] = tilegrid;\n }\n }\n }\n\n /**\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {import(\"../TileCache.js\").default} Tile cache.\n */\n getTileCacheForProjection(projection) {\n const thisProj = this.getProjection();\n if (!thisProj || equivalent(thisProj, projection)) {\n return this.tileCache;\n }\n\n const projKey = getUid(projection);\n if (!(projKey in this.tileCacheForProjection_)) {\n this.tileCacheForProjection_[projKey] = new TileCache(0.1); // don't cache\n }\n return this.tileCacheForProjection_[projKey];\n }\n\n /**\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @param {!Object} usedTiles Used tiles.\n */\n expireCache(projection, usedTiles) {\n const usedTileCache = this.getTileCacheForProjection(projection);\n\n this.tileCache.expireCache(\n this.tileCache == usedTileCache ? usedTiles : {}\n );\n for (const id in this.tileCacheForProjection_) {\n const tileCache = this.tileCacheForProjection_[id];\n tileCache.expireCache(tileCache == usedTileCache ? usedTiles : {});\n }\n }\n\n clear() {\n super.clear();\n for (const id in this.tileCacheForProjection_) {\n this.tileCacheForProjection_[id].clear();\n }\n }\n}\n\nexport default DataTileSource;\n","/**\n * @module ol/source/GeoTIFF\n */\nimport DataTile from './DataTile.js';\nimport TileGrid from '../tilegrid/TileGrid.js';\nimport {\n Pool,\n globals as geotiffGlobals,\n fromBlob as tiffFromBlob,\n fromUrl as tiffFromUrl,\n fromUrls as tiffFromUrls,\n} from 'geotiff';\nimport {\n Projection,\n get as getCachedProjection,\n toUserCoordinate,\n toUserExtent,\n} from '../proj.js';\nimport {clamp} from '../math.js';\nimport {getCenter, getIntersection} from '../extent.js';\nimport {error as logError} from '../console.js';\nimport {fromCode as unitsFromCode} from '../proj/Units.js';\n\n/**\n * Determine if an image type is a mask.\n * See https://www.awaresystems.be/imaging/tiff/tifftags/newsubfiletype.html\n * @param {GeoTIFFImage} image The image.\n * @return {boolean} The image is a mask.\n */\nfunction isMask(image) {\n const fileDirectory = image.fileDirectory;\n const type = fileDirectory.NewSubfileType || 0;\n return (type & 4) === 4;\n}\n\n/**\n * @param {true|false|'auto'} preference The convertToRGB option.\n * @param {GeoTIFFImage} image The image.\n * @return {boolean} Use the `image.readRGB()` method.\n */\nfunction readRGB(preference, image) {\n if (!preference) {\n return false;\n }\n if (preference === true) {\n return true;\n }\n if (image.getSamplesPerPixel() !== 3) {\n return false;\n }\n const interpretation = image.fileDirectory.PhotometricInterpretation;\n const interpretations = geotiffGlobals.photometricInterpretations;\n return (\n interpretation === interpretations.CMYK ||\n interpretation === interpretations.YCbCr ||\n interpretation === interpretations.CIELab ||\n interpretation === interpretations.ICCLab\n );\n}\n\n/**\n * @typedef {Object} SourceInfo\n * @property {string} [url] URL for the source GeoTIFF.\n * @property {Array} [overviews] List of any overview URLs, only applies if the url parameter is given.\n * @property {Blob} [blob] Blob containing the source GeoTIFF. `blob` and `url` are mutually exclusive.\n * @property {number} [min=0] The minimum source data value. Rendered values are scaled from 0 to 1 based on\n * the configured min and max. If not provided and raster statistics are available, those will be used instead.\n * If neither are available, the minimum for the data type will be used. To disable this behavior, set\n * the `normalize` option to `false` in the constructor.\n * @property {number} [max] The maximum source data value. Rendered values are scaled from 0 to 1 based on\n * the configured min and max. If not provided and raster statistics are available, those will be used instead.\n * If neither are available, the maximum for the data type will be used. To disable this behavior, set\n * the `normalize` option to `false` in the constructor.\n * @property {number} [nodata] Values to discard (overriding any nodata values in the metadata).\n * When provided, an additional alpha band will be added to the data. Often the GeoTIFF metadata\n * will include information about nodata values, so you should only need to set this property if\n * you find that it is not already extracted from the metadata.\n * @property {Array} [bands] Band numbers to be read from (where the first band is `1`). If not provided, all bands will\n * be read. For example, if a GeoTIFF has blue (1), green (2), red (3), and near-infrared (4) bands, and you only need the\n * near-infrared band, configure `bands: [4]`.\n */\n\n/**\n * @typedef {Object} GeoKeys\n * @property {number} GTModelTypeGeoKey Model type.\n * @property {number} GTRasterTypeGeoKey Raster type.\n * @property {number} GeogAngularUnitsGeoKey Angular units.\n * @property {number} GeogInvFlatteningGeoKey Inverse flattening.\n * @property {number} GeogSemiMajorAxisGeoKey Semi-major axis.\n * @property {number} GeographicTypeGeoKey Geographic coordinate system code.\n * @property {number} ProjLinearUnitsGeoKey Projected linear unit code.\n * @property {number} ProjectedCSTypeGeoKey Projected coordinate system code.\n */\n\n/**\n * @typedef {import(\"geotiff\").GeoTIFF} GeoTIFF\n */\n\n/**\n * @typedef {import(\"geotiff\").MultiGeoTIFF} MultiGeoTIFF\n */\n\n/**\n * @typedef {Object} GDALMetadata\n * @property {string} STATISTICS_MINIMUM The minimum value (as a string).\n * @property {string} STATISTICS_MAXIMUM The maximum value (as a string).\n */\n\nconst STATISTICS_MAXIMUM = 'STATISTICS_MAXIMUM';\nconst STATISTICS_MINIMUM = 'STATISTICS_MINIMUM';\n\nconst defaultTileSize = 256;\n\n/**\n * @typedef {import(\"geotiff\").GeoTIFFImage} GeoTIFFImage\n */\n\nlet workerPool;\nfunction getWorkerPool() {\n if (!workerPool) {\n workerPool = new Pool();\n }\n return workerPool;\n}\n\n/**\n * Get the bounding box of an image. If the image does not have an affine transform,\n * the pixel bounds are returned.\n * @param {GeoTIFFImage} image The image.\n * @return {Array} The image bounding box.\n */\nfunction getBoundingBox(image) {\n try {\n return image.getBoundingBox();\n } catch (_) {\n const fileDirectory = image.fileDirectory;\n return [0, 0, fileDirectory.ImageWidth, fileDirectory.ImageLength];\n }\n}\n\n/**\n * Get the origin of an image. If the image does not have an affine transform,\n * the top-left corner of the pixel bounds is returned.\n * @param {GeoTIFFImage} image The image.\n * @return {Array} The image origin.\n */\nfunction getOrigin(image) {\n try {\n return image.getOrigin().slice(0, 2);\n } catch (_) {\n return [0, image.fileDirectory.ImageLength];\n }\n}\n\n/**\n * Get the resolution of an image. If the image does not have an affine transform,\n * the width of the image is compared with the reference image.\n * @param {GeoTIFFImage} image The image.\n * @param {GeoTIFFImage} referenceImage The reference image.\n * @return {Array} The map x and y units per pixel.\n */\nfunction getResolutions(image, referenceImage) {\n try {\n return image.getResolution(referenceImage);\n } catch (_) {\n return [\n referenceImage.fileDirectory.ImageWidth / image.fileDirectory.ImageWidth,\n referenceImage.fileDirectory.ImageHeight /\n image.fileDirectory.ImageHeight,\n ];\n }\n}\n\n/**\n * @param {GeoTIFFImage} image A GeoTIFF.\n * @return {import(\"../proj/Projection.js\").default} The image projection.\n */\nfunction getProjection(image) {\n const geoKeys = image.geoKeys;\n if (!geoKeys) {\n return null;\n }\n\n if (\n geoKeys.ProjectedCSTypeGeoKey &&\n geoKeys.ProjectedCSTypeGeoKey !== 32767\n ) {\n const code = 'EPSG:' + geoKeys.ProjectedCSTypeGeoKey;\n let projection = getCachedProjection(code);\n if (!projection) {\n const units = unitsFromCode(geoKeys.ProjLinearUnitsGeoKey);\n if (units) {\n projection = new Projection({\n code: code,\n units: units,\n });\n }\n }\n return projection;\n }\n\n if (geoKeys.GeographicTypeGeoKey && geoKeys.GeographicTypeGeoKey !== 32767) {\n const code = 'EPSG:' + geoKeys.GeographicTypeGeoKey;\n let projection = getCachedProjection(code);\n if (!projection) {\n const units = unitsFromCode(geoKeys.GeogAngularUnitsGeoKey);\n if (units) {\n projection = new Projection({\n code: code,\n units: units,\n });\n }\n }\n return projection;\n }\n\n return null;\n}\n\n/**\n * @param {GeoTIFF|MultiGeoTIFF} tiff A GeoTIFF.\n * @return {Promise>} Resolves to a list of images.\n */\nfunction getImagesForTIFF(tiff) {\n return tiff.getImageCount().then(function (count) {\n const requests = new Array(count);\n for (let i = 0; i < count; ++i) {\n requests[i] = tiff.getImage(i);\n }\n return Promise.all(requests);\n });\n}\n\n/**\n * @param {SourceInfo} source The GeoTIFF source.\n * @param {Object} options Options for the GeoTIFF source.\n * @return {Promise>} Resolves to a list of images.\n */\nfunction getImagesForSource(source, options) {\n let request;\n if (source.blob) {\n request = tiffFromBlob(source.blob);\n } else if (source.overviews) {\n request = tiffFromUrls(source.url, source.overviews, options);\n } else {\n request = tiffFromUrl(source.url, options);\n }\n return request.then(getImagesForTIFF);\n}\n\n/**\n * @param {number|Array|Array>} expected Expected value.\n * @param {number|Array|Array>} got Actual value.\n * @param {number} tolerance Accepted tolerance in fraction of expected between expected and got.\n * @param {string} message The error message.\n * @param {function(Error):void} rejector A function to be called with any error.\n */\nfunction assertEqual(expected, got, tolerance, message, rejector) {\n if (Array.isArray(expected)) {\n const length = expected.length;\n if (!Array.isArray(got) || length != got.length) {\n const error = new Error(message);\n rejector(error);\n throw error;\n }\n for (let i = 0; i < length; ++i) {\n assertEqual(expected[i], got[i], tolerance, message, rejector);\n }\n return;\n }\n\n got = /** @type {number} */ (got);\n if (Math.abs(expected - got) > tolerance * expected) {\n throw new Error(message);\n }\n}\n\n/**\n * @param {Array} array The data array.\n * @return {number} The minimum value.\n */\nfunction getMinForDataType(array) {\n if (array instanceof Int8Array) {\n return -128;\n }\n if (array instanceof Int16Array) {\n return -32768;\n }\n if (array instanceof Int32Array) {\n return -2147483648;\n }\n if (array instanceof Float32Array) {\n return 1.2e-38;\n }\n return 0;\n}\n\n/**\n * @param {Array} array The data array.\n * @return {number} The maximum value.\n */\nfunction getMaxForDataType(array) {\n if (array instanceof Int8Array) {\n return 127;\n }\n if (array instanceof Uint8Array) {\n return 255;\n }\n if (array instanceof Uint8ClampedArray) {\n return 255;\n }\n if (array instanceof Int16Array) {\n return 32767;\n }\n if (array instanceof Uint16Array) {\n return 65535;\n }\n if (array instanceof Int32Array) {\n return 2147483647;\n }\n if (array instanceof Uint32Array) {\n return 4294967295;\n }\n if (array instanceof Float32Array) {\n return 3.4e38;\n }\n return 255;\n}\n\n/**\n * @typedef {Object} GeoTIFFSourceOptions\n * @property {boolean} [forceXHR=false] Whether to force the usage of the browsers XMLHttpRequest API.\n * @property {Object} [headers] additional key-value pairs of headers to be passed with each request. Key is the header name, value the header value.\n * @property {string} [credentials] How credentials shall be handled. See\n * https://developer.mozilla.org/en-US/docs/Web/API/fetch for reference and possible values\n * @property {number} [maxRanges] The maximum amount of ranges to request in a single multi-range request.\n * By default only a single range is used.\n * @property {boolean} [allowFullFile=false] Whether or not a full file is accepted when only a portion is\n * requested. Only use this when you know the source image to be small enough to fit in memory.\n * @property {number} [blockSize=65536] The block size to use.\n * @property {number} [cacheSize=100] The number of blocks that shall be held in a LRU cache.\n */\n\n/**\n * @typedef {Object} Options\n * @property {Array} sources List of information about GeoTIFF sources.\n * Multiple sources can be combined when their resolution sets are equal after applying a scale.\n * The list of sources defines a mapping between input bands as they are read from each GeoTIFF and\n * the output bands that are provided by data tiles. To control which bands to read from each GeoTIFF,\n * use the {@link import(\"./GeoTIFF.js\").SourceInfo bands} property. If, for example, you specify two\n * sources, one with 3 bands and {@link import(\"./GeoTIFF.js\").SourceInfo nodata} configured, and\n * another with 1 band, the resulting data tiles will have 5 bands: 3 from the first source, 1 alpha\n * band from the first source, and 1 band from the second source.\n * @property {GeoTIFFSourceOptions} [sourceOptions] Additional options to be passed to [geotiff.js](https://geotiffjs.github.io/geotiff.js/module-geotiff.html)'s `fromUrl` or `fromUrls` methods.\n * @property {true|false|'auto'} [convertToRGB=false] By default, bands from the sources are read as-is. When\n * reading GeoTIFFs with the purpose of displaying them as RGB images, setting this to `true` will\n * convert other color spaces (YCbCr, CMYK) to RGB. Setting the option to `'auto'` will make it so CMYK, YCbCr,\n * CIELab, and ICCLab images will automatically be converted to RGB.\n * @property {boolean} [normalize=true] By default, the source data is normalized to values between\n * 0 and 1 with scaling factors based on the raster statistics or `min` and `max` properties of each source.\n * If instead you want to work with the raw values in a style expression, set this to `false`. Setting this option\n * to `false` will make it so any `min` and `max` properties on sources are ignored.\n * @property {boolean} [opaque=false] Whether the layer is opaque.\n * @property {number} [transition=250] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n * @property {boolean} [wrapX=false] Render tiles beyond the tile grid extent.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling. By default,\n * the linear interpolation is used to resample the data. If false, nearest neighbor is used.\n */\n\n/**\n * @classdesc\n * A source for working with GeoTIFF data.\n * **Note for users of the full build**: The `GeoTIFF` source requires the\n * [geotiff.js](https://github.com/geotiffjs/geotiff.js) library to be loaded as well.\n *\n * @api\n */\nclass GeoTIFFSource extends DataTile {\n /**\n * @param {Options} options Data tile options.\n */\n constructor(options) {\n super({\n state: 'loading',\n tileGrid: null,\n projection: null,\n opaque: options.opaque,\n transition: options.transition,\n interpolate: options.interpolate !== false,\n wrapX: options.wrapX,\n });\n\n /**\n * @type {Array}\n * @private\n */\n this.sourceInfo_ = options.sources;\n\n const numSources = this.sourceInfo_.length;\n\n /**\n * @type {Object}\n * @private\n */\n this.sourceOptions_ = options.sourceOptions;\n\n /**\n * @type {Array>}\n * @private\n */\n this.sourceImagery_ = new Array(numSources);\n\n /**\n * @type {Array>}\n * @private\n */\n this.sourceMasks_ = new Array(numSources);\n\n /**\n * @type {Array}\n * @private\n */\n this.resolutionFactors_ = new Array(numSources);\n\n /**\n * @type {Array}\n * @private\n */\n this.samplesPerPixel_;\n\n /**\n * @type {Array>}\n * @private\n */\n this.nodataValues_;\n\n /**\n * @type {Array>}\n * @private\n */\n this.metadata_;\n\n /**\n * @type {boolean}\n * @private\n */\n this.normalize_ = options.normalize !== false;\n\n /**\n * @type {boolean}\n * @private\n */\n this.addAlpha_ = false;\n\n /**\n * @type {Error}\n * @private\n */\n this.error_ = null;\n\n /**\n * @type {true|false|'auto'}\n */\n this.convertToRGB_ = options.convertToRGB || false;\n\n this.setKey(this.sourceInfo_.map((source) => source.url).join(','));\n\n const self = this;\n const requests = new Array(numSources);\n for (let i = 0; i < numSources; ++i) {\n requests[i] = getImagesForSource(\n this.sourceInfo_[i],\n this.sourceOptions_\n );\n }\n Promise.all(requests)\n .then(function (sources) {\n self.configure_(sources);\n })\n .catch(function (error) {\n logError(error);\n self.error_ = error;\n self.setState('error');\n });\n }\n\n /**\n * @return {Error} A source loading error. When the source state is `error`, use this function\n * to get more information about the error. To debug a faulty configuration, you may want to use\n * a listener like\n * ```js\n * geotiffSource.on('change', () => {\n * if (geotiffSource.getState() === 'error') {\n * console.error(geotiffSource.getError());\n * }\n * });\n * ```\n */\n getError() {\n return this.error_;\n }\n\n /**\n * Determine the projection of the images in this GeoTIFF.\n * The default implementation looks at the ProjectedCSTypeGeoKey and the GeographicTypeGeoKey\n * of each image in turn.\n * You can override this method in a subclass to support more projections.\n *\n * @param {Array>} sources Each source is a list of images\n * from a single GeoTIFF.\n */\n determineProjection(sources) {\n const firstSource = sources[0];\n for (let i = firstSource.length - 1; i >= 0; --i) {\n const image = firstSource[i];\n const projection = getProjection(image);\n if (projection) {\n this.projection = projection;\n break;\n }\n }\n }\n\n /**\n * Configure the tile grid based on images within the source GeoTIFFs. Each GeoTIFF\n * must have the same internal tiled structure.\n * @param {Array>} sources Each source is a list of images\n * from a single GeoTIFF.\n * @private\n */\n configure_(sources) {\n let extent;\n let origin;\n let commonRenderTileSizes;\n let commonSourceTileSizes;\n let resolutions;\n const samplesPerPixel = new Array(sources.length);\n const nodataValues = new Array(sources.length);\n const metadata = new Array(sources.length);\n let minZoom = 0;\n\n const sourceCount = sources.length;\n for (let sourceIndex = 0; sourceIndex < sourceCount; ++sourceIndex) {\n const images = [];\n const masks = [];\n sources[sourceIndex].forEach((item) => {\n if (isMask(item)) {\n masks.push(item);\n } else {\n images.push(item);\n }\n });\n\n const imageCount = images.length;\n if (masks.length > 0 && masks.length !== imageCount) {\n throw new Error(\n `Expected one mask per image found ${masks.length} masks and ${imageCount} images`\n );\n }\n\n let sourceExtent;\n let sourceOrigin;\n const sourceTileSizes = new Array(imageCount);\n const renderTileSizes = new Array(imageCount);\n const sourceResolutions = new Array(imageCount);\n\n nodataValues[sourceIndex] = new Array(imageCount);\n metadata[sourceIndex] = new Array(imageCount);\n\n for (let imageIndex = 0; imageIndex < imageCount; ++imageIndex) {\n const image = images[imageIndex];\n const nodataValue = image.getGDALNoData();\n metadata[sourceIndex][imageIndex] = image.getGDALMetadata(0);\n nodataValues[sourceIndex][imageIndex] = nodataValue;\n\n const wantedSamples = this.sourceInfo_[sourceIndex].bands;\n samplesPerPixel[sourceIndex] = wantedSamples\n ? wantedSamples.length\n : image.getSamplesPerPixel();\n const level = imageCount - (imageIndex + 1);\n\n if (!sourceExtent) {\n sourceExtent = getBoundingBox(image);\n }\n\n if (!sourceOrigin) {\n sourceOrigin = getOrigin(image);\n }\n\n const imageResolutions = getResolutions(image, images[0]);\n sourceResolutions[level] = imageResolutions[0];\n\n const sourceTileSize = [image.getTileWidth(), image.getTileHeight()];\n\n // request larger blocks for untiled layouts\n if (\n sourceTileSize[0] !== sourceTileSize[1] &&\n sourceTileSize[1] < defaultTileSize\n ) {\n sourceTileSize[0] = defaultTileSize;\n sourceTileSize[1] = defaultTileSize;\n }\n\n sourceTileSizes[level] = sourceTileSize;\n\n const aspectRatio = imageResolutions[0] / Math.abs(imageResolutions[1]);\n renderTileSizes[level] = [\n sourceTileSize[0],\n sourceTileSize[1] / aspectRatio,\n ];\n }\n\n if (!extent) {\n extent = sourceExtent;\n } else {\n getIntersection(extent, sourceExtent, extent);\n }\n\n if (!origin) {\n origin = sourceOrigin;\n } else {\n const message = `Origin mismatch for source ${sourceIndex}, got [${sourceOrigin}] but expected [${origin}]`;\n assertEqual(origin, sourceOrigin, 0, message, this.viewRejector);\n }\n\n if (!resolutions) {\n resolutions = sourceResolutions;\n this.resolutionFactors_[sourceIndex] = 1;\n } else {\n if (resolutions.length - minZoom > sourceResolutions.length) {\n minZoom = resolutions.length - sourceResolutions.length;\n }\n const resolutionFactor =\n resolutions[resolutions.length - 1] /\n sourceResolutions[sourceResolutions.length - 1];\n this.resolutionFactors_[sourceIndex] = resolutionFactor;\n const scaledSourceResolutions = sourceResolutions.map(\n (resolution) => (resolution *= resolutionFactor)\n );\n const message = `Resolution mismatch for source ${sourceIndex}, got [${scaledSourceResolutions}] but expected [${resolutions}]`;\n assertEqual(\n resolutions.slice(minZoom, resolutions.length),\n scaledSourceResolutions,\n 0.02,\n message,\n this.viewRejector\n );\n }\n\n if (!commonRenderTileSizes) {\n commonRenderTileSizes = renderTileSizes;\n } else {\n assertEqual(\n commonRenderTileSizes.slice(minZoom, commonRenderTileSizes.length),\n renderTileSizes,\n 0.01,\n `Tile size mismatch for source ${sourceIndex}`,\n this.viewRejector\n );\n }\n\n if (!commonSourceTileSizes) {\n commonSourceTileSizes = sourceTileSizes;\n } else {\n assertEqual(\n commonSourceTileSizes.slice(minZoom, commonSourceTileSizes.length),\n sourceTileSizes,\n 0,\n `Tile size mismatch for source ${sourceIndex}`,\n this.viewRejector\n );\n }\n\n this.sourceImagery_[sourceIndex] = images.reverse();\n this.sourceMasks_[sourceIndex] = masks.reverse();\n }\n\n for (let i = 0, ii = this.sourceImagery_.length; i < ii; ++i) {\n const sourceImagery = this.sourceImagery_[i];\n while (sourceImagery.length < resolutions.length) {\n sourceImagery.unshift(undefined);\n }\n }\n\n if (!this.getProjection()) {\n this.determineProjection(sources);\n }\n\n this.samplesPerPixel_ = samplesPerPixel;\n this.nodataValues_ = nodataValues;\n this.metadata_ = metadata;\n\n // decide if we need to add an alpha band to handle nodata\n outer: for (let sourceIndex = 0; sourceIndex < sourceCount; ++sourceIndex) {\n // option 1: source is configured with a nodata value\n if (this.sourceInfo_[sourceIndex].nodata !== undefined) {\n this.addAlpha_ = true;\n break;\n }\n if (this.sourceMasks_[sourceIndex].length) {\n this.addAlpha_ = true;\n break;\n }\n\n const values = nodataValues[sourceIndex];\n\n // option 2: check image metadata for limited bands\n const bands = this.sourceInfo_[sourceIndex].bands;\n if (bands) {\n for (let i = 0; i < bands.length; ++i) {\n if (values[bands[i] - 1] !== null) {\n this.addAlpha_ = true;\n break outer;\n }\n }\n continue;\n }\n\n // option 3: check image metadata for all bands\n for (let imageIndex = 0; imageIndex < values.length; ++imageIndex) {\n if (values[imageIndex] !== null) {\n this.addAlpha_ = true;\n break outer;\n }\n }\n }\n\n let bandCount = this.addAlpha_ ? 1 : 0;\n for (let sourceIndex = 0; sourceIndex < sourceCount; ++sourceIndex) {\n bandCount += samplesPerPixel[sourceIndex];\n }\n this.bandCount = bandCount;\n\n const tileGrid = new TileGrid({\n extent: extent,\n minZoom: minZoom,\n origin: origin,\n resolutions: resolutions,\n tileSizes: commonRenderTileSizes,\n });\n\n this.tileGrid = tileGrid;\n this.setTileSizes(commonSourceTileSizes);\n\n this.setLoader(this.loadTile_.bind(this));\n this.setState('ready');\n\n const zoom = 1;\n if (resolutions.length === 2) {\n resolutions = [resolutions[0], resolutions[1], resolutions[1] / 2];\n } else if (resolutions.length === 1) {\n resolutions = [resolutions[0] * 2, resolutions[0], resolutions[0] / 2];\n }\n\n this.viewResolver({\n showFullExtent: true,\n projection: this.projection,\n resolutions: resolutions,\n center: toUserCoordinate(getCenter(extent), this.projection),\n extent: toUserExtent(extent, this.projection),\n zoom: zoom,\n });\n }\n\n /**\n * @param {number} z The z tile index.\n * @param {number} x The x tile index.\n * @param {number} y The y tile index.\n * @return {Promise} The composed tile data.\n * @private\n */\n loadTile_(z, x, y) {\n const sourceTileSize = this.getTileSize(z);\n const sourceCount = this.sourceImagery_.length;\n const requests = new Array(sourceCount * 2);\n const nodataValues = this.nodataValues_;\n const sourceInfo = this.sourceInfo_;\n const pool = getWorkerPool();\n for (let sourceIndex = 0; sourceIndex < sourceCount; ++sourceIndex) {\n const source = sourceInfo[sourceIndex];\n const resolutionFactor = this.resolutionFactors_[sourceIndex];\n const pixelBounds = [\n Math.round(x * (sourceTileSize[0] * resolutionFactor)),\n Math.round(y * (sourceTileSize[1] * resolutionFactor)),\n Math.round((x + 1) * (sourceTileSize[0] * resolutionFactor)),\n Math.round((y + 1) * (sourceTileSize[1] * resolutionFactor)),\n ];\n const image = this.sourceImagery_[sourceIndex][z];\n let samples;\n if (source.bands) {\n samples = source.bands.map(function (bandNumber) {\n return bandNumber - 1;\n });\n }\n\n /** @type {number|Array} */\n let fillValue;\n if ('nodata' in source && source.nodata !== null) {\n fillValue = source.nodata;\n } else {\n if (!samples) {\n fillValue = nodataValues[sourceIndex];\n } else {\n fillValue = samples.map(function (sampleIndex) {\n return nodataValues[sourceIndex][sampleIndex];\n });\n }\n }\n\n const readOptions = {\n window: pixelBounds,\n width: sourceTileSize[0],\n height: sourceTileSize[1],\n samples: samples,\n fillValue: fillValue,\n pool: pool,\n interleave: false,\n };\n if (readRGB(this.convertToRGB_, image)) {\n requests[sourceIndex] = image.readRGB(readOptions);\n } else {\n requests[sourceIndex] = image.readRasters(readOptions);\n }\n\n // requests after `sourceCount` are for mask data (if any)\n const maskIndex = sourceCount + sourceIndex;\n const mask = this.sourceMasks_[sourceIndex][z];\n if (!mask) {\n requests[maskIndex] = Promise.resolve(null);\n continue;\n }\n\n requests[maskIndex] = mask.readRasters({\n window: pixelBounds,\n width: sourceTileSize[0],\n height: sourceTileSize[1],\n samples: [0],\n pool: pool,\n interleave: false,\n });\n }\n\n return Promise.all(requests)\n .then(this.composeTile_.bind(this, sourceTileSize))\n .catch(function (error) {\n logError(error);\n throw error;\n });\n }\n\n /**\n * @param {import(\"../size.js\").Size} sourceTileSize The source tile size.\n * @param {Array} sourceSamples The source samples.\n * @return {import(\"../DataTile.js\").Data} The composed tile data.\n * @private\n */\n composeTile_(sourceTileSize, sourceSamples) {\n const metadata = this.metadata_;\n const sourceInfo = this.sourceInfo_;\n const sourceCount = this.sourceImagery_.length;\n const bandCount = this.bandCount;\n const samplesPerPixel = this.samplesPerPixel_;\n const nodataValues = this.nodataValues_;\n const normalize = this.normalize_;\n const addAlpha = this.addAlpha_;\n\n const pixelCount = sourceTileSize[0] * sourceTileSize[1];\n const dataLength = pixelCount * bandCount;\n\n /** @type {Uint8Array|Float32Array} */\n let data;\n if (normalize) {\n data = new Uint8Array(dataLength);\n } else {\n data = new Float32Array(dataLength);\n }\n\n let dataIndex = 0;\n for (let pixelIndex = 0; pixelIndex < pixelCount; ++pixelIndex) {\n let transparent = addAlpha;\n for (let sourceIndex = 0; sourceIndex < sourceCount; ++sourceIndex) {\n const source = sourceInfo[sourceIndex];\n\n let min = source.min;\n let max = source.max;\n let gain, bias;\n if (normalize) {\n const stats = metadata[sourceIndex][0];\n if (min === undefined) {\n if (stats && STATISTICS_MINIMUM in stats) {\n min = parseFloat(stats[STATISTICS_MINIMUM]);\n } else {\n min = getMinForDataType(sourceSamples[sourceIndex][0]);\n }\n }\n if (max === undefined) {\n if (stats && STATISTICS_MAXIMUM in stats) {\n max = parseFloat(stats[STATISTICS_MAXIMUM]);\n } else {\n max = getMaxForDataType(sourceSamples[sourceIndex][0]);\n }\n }\n\n gain = 255 / (max - min);\n bias = -min * gain;\n }\n\n for (\n let sampleIndex = 0;\n sampleIndex < samplesPerPixel[sourceIndex];\n ++sampleIndex\n ) {\n const sourceValue =\n sourceSamples[sourceIndex][sampleIndex][pixelIndex];\n\n let value;\n if (normalize) {\n value = clamp(gain * sourceValue + bias, 0, 255);\n } else {\n value = sourceValue;\n }\n\n if (!addAlpha) {\n data[dataIndex] = value;\n } else {\n let nodata = source.nodata;\n if (nodata === undefined) {\n let bandIndex;\n if (source.bands) {\n bandIndex = source.bands[sampleIndex] - 1;\n } else {\n bandIndex = sampleIndex;\n }\n nodata = nodataValues[sourceIndex][bandIndex];\n }\n\n const nodataIsNaN = isNaN(nodata);\n if (\n (!nodataIsNaN && sourceValue !== nodata) ||\n (nodataIsNaN && !isNaN(sourceValue))\n ) {\n transparent = false;\n data[dataIndex] = value;\n }\n }\n dataIndex++;\n }\n if (!transparent) {\n const maskIndex = sourceCount + sourceIndex;\n const mask = sourceSamples[maskIndex];\n if (mask && !mask[0][pixelIndex]) {\n transparent = true;\n }\n }\n }\n if (addAlpha) {\n if (!transparent) {\n data[dataIndex] = 255;\n }\n dataIndex++;\n }\n }\n\n return data;\n }\n}\n\n/**\n * Get a promise for view properties based on the source. Use the result of this function\n * as the `view` option in a map constructor.\n *\n * const source = new GeoTIFF(options);\n *\n * const map = new Map({\n * target: 'map',\n * layers: [\n * new TileLayer({\n * source: source,\n * }),\n * ],\n * view: source.getView(),\n * });\n *\n * @function\n * @return {Promise} A promise for view-related properties.\n * @api\n *\n */\nGeoTIFFSource.prototype.getView;\n\nexport default GeoTIFFSource;\n","/**\n * @module ol/source/Zoomify\n */\nimport {DEFAULT_TILE_SIZE} from '../tilegrid/common.js';\n\nimport ImageTile from '../ImageTile.js';\nimport TileGrid from '../tilegrid/TileGrid.js';\nimport TileImage from './TileImage.js';\nimport TileState from '../TileState.js';\nimport {assert} from '../asserts.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {createFromTileUrlFunctions, expandUrl} from '../tileurlfunction.js';\nimport {getCenter} from '../extent.js';\nimport {toSize} from '../size.js';\n\n/**\n * @typedef {'default' | 'truncated'} TierSizeCalculation\n */\n\nexport class CustomTile extends ImageTile {\n /**\n * @param {import(\"../size.js\").Size} tileSize Full tile size.\n * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {import(\"../TileState.js\").default} state State.\n * @param {string} src Image source URI.\n * @param {?string} crossOrigin Cross origin.\n * @param {import(\"../Tile.js\").LoadFunction} tileLoadFunction Tile load function.\n * @param {import(\"../Tile.js\").Options} [options] Tile options.\n */\n constructor(\n tileSize,\n tileCoord,\n state,\n src,\n crossOrigin,\n tileLoadFunction,\n options\n ) {\n super(tileCoord, state, src, crossOrigin, tileLoadFunction, options);\n\n /**\n * @private\n * @type {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement}\n */\n this.zoomifyImage_ = null;\n\n /**\n * @type {import(\"../size.js\").Size}\n */\n this.tileSize_ = tileSize;\n }\n\n /**\n * Get the image element for this tile.\n * @return {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} Image.\n */\n getImage() {\n if (this.zoomifyImage_) {\n return this.zoomifyImage_;\n }\n const image = super.getImage();\n if (this.state == TileState.LOADED) {\n const tileSize = this.tileSize_;\n if (image.width == tileSize[0] && image.height == tileSize[1]) {\n this.zoomifyImage_ = image;\n return image;\n }\n const context = createCanvasContext2D(tileSize[0], tileSize[1]);\n context.drawImage(image, 0, 0);\n this.zoomifyImage_ = context.canvas;\n return context.canvas;\n }\n return image;\n }\n}\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {number} [cacheSize] Initial tile cache size. Will auto-grow to hold at least the number of tiles in the viewport.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images. Note that\n * you must provide a `crossOrigin` value you want to access pixel data with the Canvas renderer.\n * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling. By default,\n * linear interpolation is used when resampling. Set to false to use the nearest neighbor instead.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection.\n * @property {number} [tilePixelRatio] The pixel ratio used by the tile service. For example, if the tile service advertizes 256px by 256px tiles but actually sends 512px by 512px images (for retina/hidpi devices) then `tilePixelRatio` should be set to `2`\n * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {string} url URL template or base URL of the Zoomify service.\n * A base URL is the fixed part\n * of the URL, excluding the tile group, z, x, and y folder structure, e.g.\n * `http://my.zoomify.info/IMAGE.TIF/`. A URL template must include\n * `{TileGroup}`, `{x}`, `{y}`, and `{z}` placeholders, e.g.\n * `http://my.zoomify.info/IMAGE.TIF/{TileGroup}/{z}-{x}-{y}.jpg`.\n * Internet Imaging Protocol (IIP) with JTL extension can be also used with\n * `{tileIndex}` and `{z}` placeholders, e.g.\n * `http://my.zoomify.info?FIF=IMAGE.TIF&JTL={z},{tileIndex}`.\n * A `{?-?}` template pattern, for example `subdomain{a-f}.domain.com`, may be\n * used instead of defining each one separately in the `urls` option.\n * @property {TierSizeCalculation} [tierSizeCalculation] Tier size calculation method: `default` or `truncated`.\n * @property {import(\"../size.js\").Size} size Size.\n * @property {import(\"../extent.js\").Extent} [extent] Extent for the TileGrid that is created.\n * Default sets the TileGrid in the\n * fourth quadrant, meaning extent is `[0, -height, width, 0]`. To change the\n * extent to the first quadrant (the default for OpenLayers 2) set the extent\n * as `[0, 0, width, height]`.\n * @property {number} [transition] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n * @property {number} [tileSize=256] Tile size. Same tile size is used for all zoom levels.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0]\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n */\n\n/**\n * @classdesc\n * Layer source for tile data in Zoomify format (both Zoomify and Internet\n * Imaging Protocol are supported).\n * @api\n */\nclass Zoomify extends TileImage {\n /**\n * @param {Options} options Options.\n */\n constructor(options) {\n const size = options.size;\n const tierSizeCalculation =\n options.tierSizeCalculation !== undefined\n ? options.tierSizeCalculation\n : 'default';\n\n const tilePixelRatio = options.tilePixelRatio || 1;\n const imageWidth = size[0];\n const imageHeight = size[1];\n const tierSizeInTiles = [];\n const tileSize = options.tileSize || DEFAULT_TILE_SIZE;\n let tileSizeForTierSizeCalculation = tileSize * tilePixelRatio;\n\n switch (tierSizeCalculation) {\n case 'default':\n while (\n imageWidth > tileSizeForTierSizeCalculation ||\n imageHeight > tileSizeForTierSizeCalculation\n ) {\n tierSizeInTiles.push([\n Math.ceil(imageWidth / tileSizeForTierSizeCalculation),\n Math.ceil(imageHeight / tileSizeForTierSizeCalculation),\n ]);\n tileSizeForTierSizeCalculation += tileSizeForTierSizeCalculation;\n }\n break;\n case 'truncated':\n let width = imageWidth;\n let height = imageHeight;\n while (\n width > tileSizeForTierSizeCalculation ||\n height > tileSizeForTierSizeCalculation\n ) {\n tierSizeInTiles.push([\n Math.ceil(width / tileSizeForTierSizeCalculation),\n Math.ceil(height / tileSizeForTierSizeCalculation),\n ]);\n width >>= 1;\n height >>= 1;\n }\n break;\n default: // Unknown `tierSizeCalculation` configured\n assert(false, 53);\n break;\n }\n\n tierSizeInTiles.push([1, 1]);\n tierSizeInTiles.reverse();\n\n const resolutions = [tilePixelRatio];\n const tileCountUpToTier = [0];\n for (let i = 1, ii = tierSizeInTiles.length; i < ii; i++) {\n resolutions.push(tilePixelRatio << i);\n tileCountUpToTier.push(\n tierSizeInTiles[i - 1][0] * tierSizeInTiles[i - 1][1] +\n tileCountUpToTier[i - 1]\n );\n }\n resolutions.reverse();\n\n const tileGrid = new TileGrid({\n tileSize: tileSize,\n extent: options.extent || [0, -imageHeight, imageWidth, 0],\n resolutions: resolutions,\n });\n\n let url = options.url;\n if (url && !url.includes('{TileGroup}') && !url.includes('{tileIndex}')) {\n url += '{TileGroup}/{z}-{x}-{y}.jpg';\n }\n const urls = expandUrl(url);\n\n let tileWidth = tileSize * tilePixelRatio;\n\n /**\n * @param {string} template Template.\n * @return {import(\"../Tile.js\").UrlFunction} Tile URL function.\n */\n function createFromTemplate(template) {\n return (\n /**\n * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile Coordinate.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {string|undefined} Tile URL.\n */\n function (tileCoord, pixelRatio, projection) {\n if (!tileCoord) {\n return undefined;\n }\n const tileCoordZ = tileCoord[0];\n const tileCoordX = tileCoord[1];\n const tileCoordY = tileCoord[2];\n const tileIndex =\n tileCoordX + tileCoordY * tierSizeInTiles[tileCoordZ][0];\n const tileGroup =\n ((tileIndex + tileCountUpToTier[tileCoordZ]) / tileWidth) | 0;\n const localContext = {\n 'z': tileCoordZ,\n 'x': tileCoordX,\n 'y': tileCoordY,\n 'tileIndex': tileIndex,\n 'TileGroup': 'TileGroup' + tileGroup,\n };\n return template.replace(/\\{(\\w+?)\\}/g, function (m, p) {\n return localContext[p];\n });\n }\n );\n }\n\n const tileUrlFunction = createFromTileUrlFunctions(\n urls.map(createFromTemplate)\n );\n\n const ZoomifyTileClass = CustomTile.bind(\n null,\n toSize(tileSize * tilePixelRatio)\n );\n\n super({\n attributions: options.attributions,\n cacheSize: options.cacheSize,\n crossOrigin: options.crossOrigin,\n interpolate: options.interpolate,\n projection: options.projection,\n tilePixelRatio: tilePixelRatio,\n reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n tileClass: ZoomifyTileClass,\n tileGrid: tileGrid,\n tileUrlFunction: tileUrlFunction,\n transition: options.transition,\n });\n\n /**\n * @type {number|import(\"../array.js\").NearestDirectionFunction}\n */\n this.zDirection = options.zDirection;\n\n // Server retina tile detection (non-standard):\n // Try loading the center tile for the highest resolution. If it is not\n // available, we are dealing with retina tiles, and need to adjust the\n // tile url calculation.\n const tileUrl = tileGrid.getTileCoordForCoordAndResolution(\n getCenter(tileGrid.getExtent()),\n resolutions[resolutions.length - 1]\n );\n const testTileUrl = tileUrlFunction(tileUrl, 1, null);\n const image = new Image();\n image.addEventListener('error', () => {\n tileWidth = tileSize;\n this.changed();\n });\n image.src = testTileUrl;\n }\n}\n\nexport default Zoomify;\n","/**\n * @module ol/format/IIIFInfo\n */\n\nimport {assert} from '../asserts.js';\n\n/**\n * @typedef {Object} PreferredOptions\n * @property {string} [format] Preferred image format. Will be used if the image information\n * indicates support for that format.\n * @property {string} [quality] IIIF image qualitiy. Will be used if the image information\n * indicates support for that quality.\n */\n\n/**\n * @typedef {Object} SupportedFeatures\n * @property {Array} [supports] Supported IIIF image size and region\n * calculation features.\n * @property {Array} [formats] Supported image formats.\n * @property {Array} [qualities] Supported IIIF image qualities.\n */\n\n/**\n * @typedef {Object} TileInfo\n * @property {Array} scaleFactors Supported resolution scaling factors.\n * @property {number} width Tile width in pixels.\n * @property {number} [height] Tile height in pixels. Same as tile width if height is\n * not given.\n */\n\n/**\n * @typedef {Object} IiifProfile\n * @property {Array} [formats] Supported image formats for the image service.\n * @property {Array} [qualities] Supported IIIF image qualities.\n * @property {Array} [supports] Supported features.\n * @property {number} [maxArea] Maximum area (pixels) available for this image service.\n * @property {number} [maxHeight] Maximum height.\n * @property {number} [maxWidth] Maximum width.\n */\n\n/**\n * @typedef {Object|TileInfo>>}\n * ImageInformationResponse\n */\n\n/**\n * Enum representing the major IIIF Image API versions\n * @enum {string}\n */\nexport const Versions = {\n VERSION1: 'version1',\n VERSION2: 'version2',\n VERSION3: 'version3',\n};\n\n/**\n * Supported image formats, qualities and supported region / size calculation features\n * for different image API versions and compliance levels\n * @const\n * @type {Object>}\n */\nconst IIIF_PROFILE_VALUES = {};\nIIIF_PROFILE_VALUES[Versions.VERSION1] = {\n 'level0': {\n supports: [],\n formats: [],\n qualities: ['native'],\n },\n 'level1': {\n supports: ['regionByPx', 'sizeByW', 'sizeByH', 'sizeByPct'],\n formats: ['jpg'],\n qualities: ['native'],\n },\n 'level2': {\n supports: [\n 'regionByPx',\n 'regionByPct',\n 'sizeByW',\n 'sizeByH',\n 'sizeByPct',\n 'sizeByConfinedWh',\n 'sizeByWh',\n ],\n formats: ['jpg', 'png'],\n qualities: ['native', 'color', 'grey', 'bitonal'],\n },\n};\nIIIF_PROFILE_VALUES[Versions.VERSION2] = {\n 'level0': {\n supports: [],\n formats: ['jpg'],\n qualities: ['default'],\n },\n 'level1': {\n supports: ['regionByPx', 'sizeByW', 'sizeByH', 'sizeByPct'],\n formats: ['jpg'],\n qualities: ['default'],\n },\n 'level2': {\n supports: [\n 'regionByPx',\n 'regionByPct',\n 'sizeByW',\n 'sizeByH',\n 'sizeByPct',\n 'sizeByConfinedWh',\n 'sizeByDistortedWh',\n 'sizeByWh',\n ],\n formats: ['jpg', 'png'],\n qualities: ['default', 'bitonal'],\n },\n};\nIIIF_PROFILE_VALUES[Versions.VERSION3] = {\n 'level0': {\n supports: [],\n formats: ['jpg'],\n qualities: ['default'],\n },\n 'level1': {\n supports: ['regionByPx', 'regionSquare', 'sizeByW', 'sizeByH', 'sizeByWh'],\n formats: ['jpg'],\n qualities: ['default'],\n },\n 'level2': {\n supports: [\n 'regionByPx',\n 'regionSquare',\n 'regionByPct',\n 'sizeByW',\n 'sizeByH',\n 'sizeByPct',\n 'sizeByConfinedWh',\n 'sizeByWh',\n ],\n formats: ['jpg', 'png'],\n qualities: ['default'],\n },\n};\nIIIF_PROFILE_VALUES['none'] = {\n 'none': {\n supports: [],\n formats: [],\n qualities: [],\n },\n};\n\nconst COMPLIANCE_VERSION1 =\n /^https?:\\/\\/library\\.stanford\\.edu\\/iiif\\/image-api\\/(?:1\\.1\\/)?compliance\\.html#level[0-2]$/;\nconst COMPLIANCE_VERSION2 =\n /^https?:\\/\\/iiif\\.io\\/api\\/image\\/2\\/level[0-2](?:\\.json)?$/;\nconst COMPLIANCE_VERSION3 =\n /(^https?:\\/\\/iiif\\.io\\/api\\/image\\/3\\/level[0-2](?:\\.json)?$)|(^level[0-2]$)/;\n\nfunction generateVersion1Options(iiifInfo) {\n let levelProfile = iiifInfo.getComplianceLevelSupportedFeatures();\n // Version 1.0 and 1.1 do not require a profile.\n if (levelProfile === undefined) {\n levelProfile = IIIF_PROFILE_VALUES[Versions.VERSION1]['level0'];\n }\n return {\n url:\n iiifInfo.imageInfo['@id'] === undefined\n ? undefined\n : iiifInfo.imageInfo['@id'].replace(/\\/?(?:info\\.json)?$/g, ''),\n supports: levelProfile.supports,\n formats: [\n ...levelProfile.formats,\n iiifInfo.imageInfo.formats === undefined\n ? []\n : iiifInfo.imageInfo.formats,\n ],\n qualities: [\n ...levelProfile.qualities,\n iiifInfo.imageInfo.qualities === undefined\n ? []\n : iiifInfo.imageInfo.qualities,\n ],\n resolutions: iiifInfo.imageInfo.scale_factors,\n tileSize:\n iiifInfo.imageInfo.tile_width !== undefined\n ? iiifInfo.imageInfo.tile_height !== undefined\n ? [iiifInfo.imageInfo.tile_width, iiifInfo.imageInfo.tile_height]\n : [iiifInfo.imageInfo.tile_width, iiifInfo.imageInfo.tile_width]\n : iiifInfo.imageInfo.tile_height != undefined\n ? [iiifInfo.imageInfo.tile_height, iiifInfo.imageInfo.tile_height]\n : undefined,\n };\n}\n\nfunction generateVersion2Options(iiifInfo) {\n const levelProfile = iiifInfo.getComplianceLevelSupportedFeatures(),\n additionalProfile =\n Array.isArray(iiifInfo.imageInfo.profile) &&\n iiifInfo.imageInfo.profile.length > 1,\n profileSupports =\n additionalProfile && iiifInfo.imageInfo.profile[1].supports\n ? iiifInfo.imageInfo.profile[1].supports\n : [],\n profileFormats =\n additionalProfile && iiifInfo.imageInfo.profile[1].formats\n ? iiifInfo.imageInfo.profile[1].formats\n : [],\n profileQualities =\n additionalProfile && iiifInfo.imageInfo.profile[1].qualities\n ? iiifInfo.imageInfo.profile[1].qualities\n : [];\n return {\n url: iiifInfo.imageInfo['@id'].replace(/\\/?(?:info\\.json)?$/g, ''),\n sizes:\n iiifInfo.imageInfo.sizes === undefined\n ? undefined\n : iiifInfo.imageInfo.sizes.map(function (size) {\n return [size.width, size.height];\n }),\n tileSize:\n iiifInfo.imageInfo.tiles === undefined\n ? undefined\n : [\n iiifInfo.imageInfo.tiles.map(function (tile) {\n return tile.width;\n })[0],\n iiifInfo.imageInfo.tiles.map(function (tile) {\n return tile.height === undefined ? tile.width : tile.height;\n })[0],\n ],\n resolutions:\n iiifInfo.imageInfo.tiles === undefined\n ? undefined\n : iiifInfo.imageInfo.tiles.map(function (tile) {\n return tile.scaleFactors;\n })[0],\n supports: [...levelProfile.supports, ...profileSupports],\n formats: [...levelProfile.formats, ...profileFormats],\n qualities: [...levelProfile.qualities, ...profileQualities],\n };\n}\n\nfunction generateVersion3Options(iiifInfo) {\n const levelProfile = iiifInfo.getComplianceLevelSupportedFeatures(),\n formats =\n iiifInfo.imageInfo.extraFormats === undefined\n ? levelProfile.formats\n : [...levelProfile.formats, ...iiifInfo.imageInfo.extraFormats],\n preferredFormat =\n iiifInfo.imageInfo.preferredFormats !== undefined &&\n Array.isArray(iiifInfo.imageInfo.preferredFormats) &&\n iiifInfo.imageInfo.preferredFormats.length > 0\n ? iiifInfo.imageInfo.preferredFormats\n .filter(function (format) {\n return ['jpg', 'png', 'gif'].includes(format);\n })\n .reduce(function (acc, format) {\n return acc === undefined && formats.includes(format)\n ? format\n : acc;\n }, undefined)\n : undefined;\n return {\n url: iiifInfo.imageInfo['id'],\n sizes:\n iiifInfo.imageInfo.sizes === undefined\n ? undefined\n : iiifInfo.imageInfo.sizes.map(function (size) {\n return [size.width, size.height];\n }),\n tileSize:\n iiifInfo.imageInfo.tiles === undefined\n ? undefined\n : [\n iiifInfo.imageInfo.tiles.map(function (tile) {\n return tile.width;\n })[0],\n iiifInfo.imageInfo.tiles.map(function (tile) {\n return tile.height;\n })[0],\n ],\n resolutions:\n iiifInfo.imageInfo.tiles === undefined\n ? undefined\n : iiifInfo.imageInfo.tiles.map(function (tile) {\n return tile.scaleFactors;\n })[0],\n supports:\n iiifInfo.imageInfo.extraFeatures === undefined\n ? levelProfile.supports\n : [...levelProfile.supports, ...iiifInfo.imageInfo.extraFeatures],\n formats: formats,\n qualities:\n iiifInfo.imageInfo.extraQualities === undefined\n ? levelProfile.qualities\n : [...levelProfile.qualities, ...iiifInfo.imageInfo.extraQualities],\n preferredFormat: preferredFormat,\n };\n}\n\nconst versionFunctions = {};\nversionFunctions[Versions.VERSION1] = generateVersion1Options;\nversionFunctions[Versions.VERSION2] = generateVersion2Options;\nversionFunctions[Versions.VERSION3] = generateVersion3Options;\n\n/**\n * @classdesc\n * Format for transforming IIIF Image API image information responses into\n * IIIF tile source ready options\n *\n * @api\n */\nclass IIIFInfo {\n /**\n * @param {string|ImageInformationResponse} imageInfo\n * Deserialized image information JSON response object or JSON response as string\n */\n constructor(imageInfo) {\n this.setImageInfo(imageInfo);\n }\n\n /**\n * @param {string|ImageInformationResponse} imageInfo\n * Deserialized image information JSON response object or JSON response as string\n * @api\n */\n setImageInfo(imageInfo) {\n if (typeof imageInfo == 'string') {\n this.imageInfo = JSON.parse(imageInfo);\n } else {\n this.imageInfo = imageInfo;\n }\n }\n\n /**\n * @return {Versions} Major IIIF version.\n * @api\n */\n getImageApiVersion() {\n if (this.imageInfo === undefined) {\n return;\n }\n let context = this.imageInfo['@context'] || 'ol-no-context';\n if (typeof context == 'string') {\n context = [context];\n }\n for (let i = 0; i < context.length; i++) {\n switch (context[i]) {\n case 'http://library.stanford.edu/iiif/image-api/1.1/context.json':\n case 'http://iiif.io/api/image/1/context.json':\n return Versions.VERSION1;\n case 'http://iiif.io/api/image/2/context.json':\n return Versions.VERSION2;\n case 'http://iiif.io/api/image/3/context.json':\n return Versions.VERSION3;\n case 'ol-no-context':\n // Image API 1.0 has no '@context'\n if (\n this.getComplianceLevelEntryFromProfile(Versions.VERSION1) &&\n this.imageInfo.identifier\n ) {\n return Versions.VERSION1;\n }\n break;\n default:\n }\n }\n assert(false, 61);\n }\n\n /**\n * @param {Versions} version Optional IIIF image API version\n * @return {string} Compliance level as it appears in the IIIF image information\n * response.\n */\n getComplianceLevelEntryFromProfile(version) {\n if (this.imageInfo === undefined || this.imageInfo.profile === undefined) {\n return;\n }\n if (version === undefined) {\n version = this.getImageApiVersion();\n }\n switch (version) {\n case Versions.VERSION1:\n if (COMPLIANCE_VERSION1.test(this.imageInfo.profile)) {\n return this.imageInfo.profile;\n }\n break;\n case Versions.VERSION3:\n if (COMPLIANCE_VERSION3.test(this.imageInfo.profile)) {\n return this.imageInfo.profile;\n }\n break;\n case Versions.VERSION2:\n if (\n typeof this.imageInfo.profile === 'string' &&\n COMPLIANCE_VERSION2.test(this.imageInfo.profile)\n ) {\n return this.imageInfo.profile;\n }\n if (\n Array.isArray(this.imageInfo.profile) &&\n this.imageInfo.profile.length > 0 &&\n typeof this.imageInfo.profile[0] === 'string' &&\n COMPLIANCE_VERSION2.test(this.imageInfo.profile[0])\n ) {\n return this.imageInfo.profile[0];\n }\n break;\n default:\n }\n }\n\n /**\n * @param {Versions} version Optional IIIF image API version\n * @return {string} Compliance level, on of 'level0', 'level1' or 'level2' or undefined\n */\n getComplianceLevelFromProfile(version) {\n const complianceLevel = this.getComplianceLevelEntryFromProfile(version);\n if (complianceLevel === undefined) {\n return undefined;\n }\n const level = complianceLevel.match(/level[0-2](?:\\.json)?$/g);\n return Array.isArray(level) ? level[0].replace('.json', '') : undefined;\n }\n\n /**\n * @return {SupportedFeatures} Image formats, qualities and region / size calculation\n * methods that are supported by the IIIF service.\n */\n getComplianceLevelSupportedFeatures() {\n if (this.imageInfo === undefined) {\n return;\n }\n const version = this.getImageApiVersion();\n const level = this.getComplianceLevelFromProfile(version);\n if (level === undefined) {\n return IIIF_PROFILE_VALUES['none']['none'];\n }\n return IIIF_PROFILE_VALUES[version][level];\n }\n\n /**\n * @param {PreferredOptions} [preferredOptions] Optional options for preferred format and quality.\n * @return {import(\"../source/IIIF.js\").Options} IIIF tile source ready constructor options.\n * @api\n */\n getTileSourceOptions(preferredOptions) {\n const options = preferredOptions || {},\n version = this.getImageApiVersion();\n if (version === undefined) {\n return;\n }\n const imageOptions =\n version === undefined ? undefined : versionFunctions[version](this);\n if (imageOptions === undefined) {\n return;\n }\n return {\n url: imageOptions.url,\n version: version,\n size: [this.imageInfo.width, this.imageInfo.height],\n sizes: imageOptions.sizes,\n format:\n options.format !== undefined &&\n imageOptions.formats.includes(options.format)\n ? options.format\n : imageOptions.preferredFormat !== undefined\n ? imageOptions.preferredFormat\n : 'jpg',\n supports: imageOptions.supports,\n quality:\n options.quality && imageOptions.qualities.includes(options.quality)\n ? options.quality\n : imageOptions.qualities.includes('native')\n ? 'native'\n : 'default',\n resolutions: Array.isArray(imageOptions.resolutions)\n ? imageOptions.resolutions.sort(function (a, b) {\n return b - a;\n })\n : undefined,\n tileSize: imageOptions.tileSize,\n };\n }\n}\n\nexport default IIIFInfo;\n","/**\n * @module ol/source/IIIF\n */\n\nimport TileGrid from '../tilegrid/TileGrid.js';\nimport TileImage from './TileImage.js';\nimport {CustomTile} from './Zoomify.js';\nimport {DEFAULT_TILE_SIZE} from '../tilegrid/common.js';\nimport {Versions} from '../format/IIIFInfo.js';\nimport {assert} from '../asserts.js';\nimport {getTopLeft} from '../extent.js';\nimport {toSize} from '../size.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {number} [cacheSize] Size of the cache.\n * @property {null|string} [crossOrigin] The value for the crossOrigin option of the request.\n * @property {import(\"../extent.js\").Extent} [extent=[0, -height, width, 0]] The extent.\n * @property {string} [format='jpg'] Requested image format.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling. By default,\n * linear interpolation is used when resampling. Set to false to use the nearest neighbor instead.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection.\n * @property {string} [quality] Requested IIIF image quality. Default is 'native'\n * for version 1, 'default' for versions 2 and 3.\n * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {Array} [resolutions] Supported resolutions as given in IIIF 'scaleFactors'\n * @property {import(\"../size.js\").Size} size Size of the image [width, height].\n * @property {Array} [sizes] Supported scaled image sizes.\n * Content of the IIIF info.json 'sizes' property, but as array of Size objects.\n * @property {import(\"./Source.js\").State} [state] Source state.\n * @property {Array} [supports=[]] Supported IIIF region and size calculation\n * features.\n * @property {number} [tilePixelRatio] Tile pixel ratio.\n * @property {number|import(\"../size.js\").Size} [tileSize] Tile size.\n * Same tile size is used for all zoom levels. If tile size is a number,\n * a square tile is assumed. If the IIIF image service supports arbitrary\n * tiling (sizeByH, sizeByW, sizeByWh or sizeByPct as well as regionByPx or regionByPct\n * are supported), the default tilesize is 256.\n * @property {number} [transition] Transition.\n * @property {string} [url] Base URL of the IIIF Image service.\n * This should be the same as the IIIF Image ID.\n * @property {import(\"../format/IIIFInfo.js\").Versions} [version=Versions.VERSION2] Service's IIIF Image API version.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0]\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n */\n\nfunction formatPercentage(percentage) {\n return percentage.toLocaleString('en', {maximumFractionDigits: 10});\n}\n\n/**\n * @classdesc\n * Layer source for IIIF Image API services.\n * @api\n */\nclass IIIF extends TileImage {\n /**\n * @param {Options} [options] Tile source options. Use {@link import(\"../format/IIIFInfo.js\").IIIFInfo}\n * to parse Image API service information responses into constructor options.\n * @api\n */\n constructor(options) {\n /**\n * @type {Partial}\n */\n const partialOptions = options || {};\n\n let baseUrl = partialOptions.url || '';\n baseUrl =\n baseUrl +\n (baseUrl.lastIndexOf('/') === baseUrl.length - 1 || baseUrl === ''\n ? ''\n : '/');\n const version = partialOptions.version || Versions.VERSION2;\n const sizes = partialOptions.sizes || [];\n const size = partialOptions.size;\n assert(\n size != undefined &&\n Array.isArray(size) &&\n size.length == 2 &&\n !isNaN(size[0]) &&\n size[0] > 0 &&\n !isNaN(size[1]) &&\n size[1] > 0,\n 60\n );\n const width = size[0];\n const height = size[1];\n const tileSize = partialOptions.tileSize;\n const tilePixelRatio = partialOptions.tilePixelRatio || 1;\n const format = partialOptions.format || 'jpg';\n const quality =\n partialOptions.quality ||\n (partialOptions.version == Versions.VERSION1 ? 'native' : 'default');\n let resolutions = partialOptions.resolutions || [];\n const supports = partialOptions.supports || [];\n const extent = partialOptions.extent || [0, -height, width, 0];\n\n const supportsListedSizes =\n sizes != undefined && Array.isArray(sizes) && sizes.length > 0;\n const supportsListedTiles =\n tileSize !== undefined &&\n ((typeof tileSize === 'number' &&\n Number.isInteger(tileSize) &&\n tileSize > 0) ||\n (Array.isArray(tileSize) && tileSize.length > 0));\n const supportsArbitraryTiling =\n supports != undefined &&\n Array.isArray(supports) &&\n (supports.includes('regionByPx') || supports.includes('regionByPct')) &&\n (supports.includes('sizeByWh') ||\n supports.includes('sizeByH') ||\n supports.includes('sizeByW') ||\n supports.includes('sizeByPct'));\n\n let tileWidth, tileHeight, maxZoom;\n\n resolutions.sort(function (a, b) {\n return b - a;\n });\n\n if (supportsListedTiles || supportsArbitraryTiling) {\n if (tileSize != undefined) {\n if (\n typeof tileSize === 'number' &&\n Number.isInteger(tileSize) &&\n tileSize > 0\n ) {\n tileWidth = tileSize;\n tileHeight = tileSize;\n } else if (Array.isArray(tileSize) && tileSize.length > 0) {\n if (\n tileSize.length == 1 ||\n (tileSize[1] == undefined && Number.isInteger(tileSize[0]))\n ) {\n tileWidth = tileSize[0];\n tileHeight = tileSize[0];\n }\n if (tileSize.length == 2) {\n if (\n Number.isInteger(tileSize[0]) &&\n Number.isInteger(tileSize[1])\n ) {\n tileWidth = tileSize[0];\n tileHeight = tileSize[1];\n } else if (\n tileSize[0] == undefined &&\n Number.isInteger(tileSize[1])\n ) {\n tileWidth = tileSize[1];\n tileHeight = tileSize[1];\n }\n }\n }\n }\n if (tileWidth === undefined || tileHeight === undefined) {\n tileWidth = DEFAULT_TILE_SIZE;\n tileHeight = DEFAULT_TILE_SIZE;\n }\n if (resolutions.length == 0) {\n maxZoom = Math.max(\n Math.ceil(Math.log(width / tileWidth) / Math.LN2),\n Math.ceil(Math.log(height / tileHeight) / Math.LN2)\n );\n for (let i = maxZoom; i >= 0; i--) {\n resolutions.push(Math.pow(2, i));\n }\n } else {\n const maxScaleFactor = Math.max(...resolutions);\n // TODO maxScaleFactor might not be a power to 2\n maxZoom = Math.round(Math.log(maxScaleFactor) / Math.LN2);\n }\n } else {\n // No tile support.\n tileWidth = width;\n tileHeight = height;\n resolutions = [];\n if (supportsListedSizes) {\n /*\n * 'sizes' provided. Use full region in different resolutions. Every\n * resolution has only one tile.\n */\n sizes.sort(function (a, b) {\n return a[0] - b[0];\n });\n maxZoom = -1;\n const ignoredSizesIndex = [];\n for (let i = 0; i < sizes.length; i++) {\n const resolution = width / sizes[i][0];\n if (\n resolutions.length > 0 &&\n resolutions[resolutions.length - 1] == resolution\n ) {\n ignoredSizesIndex.push(i);\n continue;\n }\n resolutions.push(resolution);\n maxZoom++;\n }\n if (ignoredSizesIndex.length > 0) {\n for (let i = 0; i < ignoredSizesIndex.length; i++) {\n sizes.splice(ignoredSizesIndex[i] - i, 1);\n }\n }\n } else {\n // No useful image information at all. Try pseudo tile with full image.\n resolutions.push(1);\n sizes.push([width, height]);\n maxZoom = 0;\n }\n }\n\n const tileGrid = new TileGrid({\n tileSize: [tileWidth, tileHeight],\n extent: extent,\n origin: getTopLeft(extent),\n resolutions: resolutions,\n });\n\n const tileUrlFunction = function (tileCoord, pixelRatio, projection) {\n let regionParam, sizeParam;\n const zoom = tileCoord[0];\n if (zoom > maxZoom) {\n return;\n }\n const tileX = tileCoord[1],\n tileY = tileCoord[2],\n scale = resolutions[zoom];\n if (\n tileX === undefined ||\n tileY === undefined ||\n scale === undefined ||\n tileX < 0 ||\n Math.ceil(width / scale / tileWidth) <= tileX ||\n tileY < 0 ||\n Math.ceil(height / scale / tileHeight) <= tileY\n ) {\n return;\n }\n if (supportsArbitraryTiling || supportsListedTiles) {\n const regionX = tileX * tileWidth * scale,\n regionY = tileY * tileHeight * scale;\n let regionW = tileWidth * scale,\n regionH = tileHeight * scale,\n sizeW = tileWidth,\n sizeH = tileHeight;\n if (regionX + regionW > width) {\n regionW = width - regionX;\n }\n if (regionY + regionH > height) {\n regionH = height - regionY;\n }\n if (regionX + tileWidth * scale > width) {\n sizeW = Math.floor((width - regionX + scale - 1) / scale);\n }\n if (regionY + tileHeight * scale > height) {\n sizeH = Math.floor((height - regionY + scale - 1) / scale);\n }\n if (\n regionX == 0 &&\n regionW == width &&\n regionY == 0 &&\n regionH == height\n ) {\n // canonical full image region parameter is 'full', not 'x,y,w,h'\n regionParam = 'full';\n } else if (\n !supportsArbitraryTiling ||\n supports.includes('regionByPx')\n ) {\n regionParam = regionX + ',' + regionY + ',' + regionW + ',' + regionH;\n } else if (supports.includes('regionByPct')) {\n const pctX = formatPercentage((regionX / width) * 100),\n pctY = formatPercentage((regionY / height) * 100),\n pctW = formatPercentage((regionW / width) * 100),\n pctH = formatPercentage((regionH / height) * 100);\n regionParam = 'pct:' + pctX + ',' + pctY + ',' + pctW + ',' + pctH;\n }\n if (\n version == Versions.VERSION3 &&\n (!supportsArbitraryTiling || supports.includes('sizeByWh'))\n ) {\n sizeParam = sizeW + ',' + sizeH;\n } else if (!supportsArbitraryTiling || supports.includes('sizeByW')) {\n sizeParam = sizeW + ',';\n } else if (supports.includes('sizeByH')) {\n sizeParam = ',' + sizeH;\n } else if (supports.includes('sizeByWh')) {\n sizeParam = sizeW + ',' + sizeH;\n } else if (supports.includes('sizeByPct')) {\n sizeParam = 'pct:' + formatPercentage(100 / scale);\n }\n } else {\n regionParam = 'full';\n if (supportsListedSizes) {\n const regionWidth = sizes[zoom][0],\n regionHeight = sizes[zoom][1];\n if (version == Versions.VERSION3) {\n if (regionWidth == width && regionHeight == height) {\n sizeParam = 'max';\n } else {\n sizeParam = regionWidth + ',' + regionHeight;\n }\n } else {\n if (regionWidth == width) {\n sizeParam = 'full';\n } else {\n sizeParam = regionWidth + ',';\n }\n }\n } else {\n sizeParam = version == Versions.VERSION3 ? 'max' : 'full';\n }\n }\n return (\n baseUrl + regionParam + '/' + sizeParam + '/0/' + quality + '.' + format\n );\n };\n\n const IiifTileClass = CustomTile.bind(\n null,\n toSize(tileSize || 256).map(function (size) {\n return size * tilePixelRatio;\n })\n );\n\n super({\n attributions: partialOptions.attributions,\n attributionsCollapsible: partialOptions.attributionsCollapsible,\n cacheSize: partialOptions.cacheSize,\n crossOrigin: partialOptions.crossOrigin,\n interpolate: partialOptions.interpolate,\n projection: partialOptions.projection,\n reprojectionErrorThreshold: partialOptions.reprojectionErrorThreshold,\n state: partialOptions.state,\n tileClass: IiifTileClass,\n tileGrid: tileGrid,\n tilePixelRatio: partialOptions.tilePixelRatio,\n tileUrlFunction: tileUrlFunction,\n transition: partialOptions.transition,\n });\n\n /**\n * @type {number|import(\"../array.js\").NearestDirectionFunction}\n */\n this.zDirection = partialOptions.zDirection;\n }\n}\n\nexport default IIIF;\n","/**\n * @module ol/reproj/Image\n */\nimport {ERROR_THRESHOLD} from './common.js';\n\nimport EventType from '../events/EventType.js';\nimport ImageBase from '../ImageBase.js';\nimport ImageState from '../ImageState.js';\nimport Triangulation from './Triangulation.js';\nimport {\n calculateSourceResolution,\n render as renderReprojected,\n} from '../reproj.js';\nimport {getCenter, getHeight, getIntersection, getWidth} from '../extent.js';\nimport {listen, unlistenByKey} from '../events.js';\n\n/**\n * @typedef {function(import(\"../extent.js\").Extent, number, number) : import(\"../ImageBase.js\").default} FunctionType\n */\n\n/**\n * @classdesc\n * Class encapsulating single reprojected image.\n * See {@link module:ol/source/Image~ImageSource}.\n */\nclass ReprojImage extends ImageBase {\n /**\n * @param {import(\"../proj/Projection.js\").default} sourceProj Source projection (of the data).\n * @param {import(\"../proj/Projection.js\").default} targetProj Target projection.\n * @param {import(\"../extent.js\").Extent} targetExtent Target extent.\n * @param {number} targetResolution Target resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @param {FunctionType} getImageFunction\n * Function returning source images (extent, resolution, pixelRatio).\n * @param {boolean} interpolate Use linear interpolation when resampling.\n */\n constructor(\n sourceProj,\n targetProj,\n targetExtent,\n targetResolution,\n pixelRatio,\n getImageFunction,\n interpolate\n ) {\n const maxSourceExtent = sourceProj.getExtent();\n const maxTargetExtent = targetProj.getExtent();\n\n const limitedTargetExtent = maxTargetExtent\n ? getIntersection(targetExtent, maxTargetExtent)\n : targetExtent;\n\n const targetCenter = getCenter(limitedTargetExtent);\n const sourceResolution = calculateSourceResolution(\n sourceProj,\n targetProj,\n targetCenter,\n targetResolution\n );\n\n const errorThresholdInPixels = ERROR_THRESHOLD;\n\n const triangulation = new Triangulation(\n sourceProj,\n targetProj,\n limitedTargetExtent,\n maxSourceExtent,\n sourceResolution * errorThresholdInPixels,\n targetResolution\n );\n\n const sourceExtent = triangulation.calculateSourceExtent();\n const sourceImage = getImageFunction(\n sourceExtent,\n sourceResolution,\n pixelRatio\n );\n const state = sourceImage ? ImageState.IDLE : ImageState.EMPTY;\n const sourcePixelRatio = sourceImage ? sourceImage.getPixelRatio() : 1;\n\n super(targetExtent, targetResolution, sourcePixelRatio, state);\n\n /**\n * @private\n * @type {import(\"../proj/Projection.js\").default}\n */\n this.targetProj_ = targetProj;\n\n /**\n * @private\n * @type {import(\"../extent.js\").Extent}\n */\n this.maxSourceExtent_ = maxSourceExtent;\n\n /**\n * @private\n * @type {!import(\"./Triangulation.js\").default}\n */\n this.triangulation_ = triangulation;\n\n /**\n * @private\n * @type {number}\n */\n this.targetResolution_ = targetResolution;\n\n /**\n * @private\n * @type {import(\"../extent.js\").Extent}\n */\n this.targetExtent_ = targetExtent;\n\n /**\n * @private\n * @type {import(\"../ImageBase.js\").default}\n */\n this.sourceImage_ = sourceImage;\n\n /**\n * @private\n * @type {number}\n */\n this.sourcePixelRatio_ = sourcePixelRatio;\n\n /**\n * @private\n * @type {boolean}\n */\n this.interpolate_ = interpolate;\n\n /**\n * @private\n * @type {HTMLCanvasElement}\n */\n this.canvas_ = null;\n\n /**\n * @private\n * @type {?import(\"../events.js\").EventsKey}\n */\n this.sourceListenerKey_ = null;\n }\n\n /**\n * Clean up.\n */\n disposeInternal() {\n if (this.state == ImageState.LOADING) {\n this.unlistenSource_();\n }\n super.disposeInternal();\n }\n\n /**\n * @return {HTMLCanvasElement} Image.\n */\n getImage() {\n return this.canvas_;\n }\n\n /**\n * @return {import(\"../proj/Projection.js\").default} Projection.\n */\n getProjection() {\n return this.targetProj_;\n }\n\n /**\n * @private\n */\n reproject_() {\n const sourceState = this.sourceImage_.getState();\n if (sourceState == ImageState.LOADED) {\n const width = getWidth(this.targetExtent_) / this.targetResolution_;\n const height = getHeight(this.targetExtent_) / this.targetResolution_;\n\n this.canvas_ = renderReprojected(\n width,\n height,\n this.sourcePixelRatio_,\n this.sourceImage_.getResolution(),\n this.maxSourceExtent_,\n this.targetResolution_,\n this.targetExtent_,\n this.triangulation_,\n [\n {\n extent: this.sourceImage_.getExtent(),\n image: this.sourceImage_.getImage(),\n },\n ],\n 0,\n undefined,\n this.interpolate_\n );\n }\n this.state = sourceState;\n this.changed();\n }\n\n /**\n * Load not yet loaded URI.\n */\n load() {\n if (this.state == ImageState.IDLE) {\n this.state = ImageState.LOADING;\n this.changed();\n\n const sourceState = this.sourceImage_.getState();\n if (sourceState == ImageState.LOADED || sourceState == ImageState.ERROR) {\n this.reproject_();\n } else {\n this.sourceListenerKey_ = listen(\n this.sourceImage_,\n EventType.CHANGE,\n function (e) {\n const sourceState = this.sourceImage_.getState();\n if (\n sourceState == ImageState.LOADED ||\n sourceState == ImageState.ERROR\n ) {\n this.unlistenSource_();\n this.reproject_();\n }\n },\n this\n );\n this.sourceImage_.load();\n }\n }\n }\n\n /**\n * @private\n */\n unlistenSource_() {\n unlistenByKey(\n /** @type {!import(\"../events.js\").EventsKey} */ (this.sourceListenerKey_)\n );\n this.sourceListenerKey_ = null;\n }\n}\n\nexport default ReprojImage;\n","/**\n * @module ol/source/Image\n */\nimport Event from '../events/Event.js';\nimport ImageState from '../ImageState.js';\nimport ReprojImage from '../reproj/Image.js';\nimport Source from './Source.js';\nimport {abstract} from '../util.js';\nimport {equals} from '../extent.js';\nimport {equivalent} from '../proj.js';\nimport {linearFindNearest} from '../array.js';\n\n/**\n * @enum {string}\n */\nexport const ImageSourceEventType = {\n /**\n * Triggered when an image starts loading.\n * @event module:ol/source/Image.ImageSourceEvent#imageloadstart\n * @api\n */\n IMAGELOADSTART: 'imageloadstart',\n\n /**\n * Triggered when an image finishes loading.\n * @event module:ol/source/Image.ImageSourceEvent#imageloadend\n * @api\n */\n IMAGELOADEND: 'imageloadend',\n\n /**\n * Triggered if image loading results in an error.\n * @event module:ol/source/Image.ImageSourceEvent#imageloaderror\n * @api\n */\n IMAGELOADERROR: 'imageloaderror',\n};\n\n/**\n * @typedef {'imageloadend'|'imageloaderror'|'imageloadstart'} ImageSourceEventTypes\n */\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/source/Image~ImageSource} instances are instances of this\n * type.\n */\nexport class ImageSourceEvent extends Event {\n /**\n * @param {string} type Type.\n * @param {import(\"../Image.js\").default} image The image.\n */\n constructor(type, image) {\n super(type);\n\n /**\n * The image related to the event.\n * @type {import(\"../Image.js\").default}\n * @api\n */\n this.image = image;\n }\n}\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature &\n * import(\"../Observable\").OnSignature &\n * import(\"../Observable\").OnSignature &\n * import(\"../Observable\").CombinedOnSignature} ImageSourceOnSignature\n */\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling. By default,\n * linear interpolation is used when resampling. Set to false to use the nearest neighbor instead.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection.\n * @property {Array} [resolutions] Resolutions.\n * @property {import(\"./Source.js\").State} [state] State.\n */\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for sources providing a single image.\n * @abstract\n * @fires module:ol/source/Image.ImageSourceEvent\n * @api\n */\nclass ImageSource extends Source {\n /**\n * @param {Options} options Single image source options.\n */\n constructor(options) {\n super({\n attributions: options.attributions,\n projection: options.projection,\n state: options.state,\n interpolate:\n options.interpolate !== undefined ? options.interpolate : true,\n });\n\n /***\n * @type {ImageSourceOnSignature}\n */\n this.on;\n\n /***\n * @type {ImageSourceOnSignature}\n */\n this.once;\n\n /***\n * @type {ImageSourceOnSignature}\n */\n this.un;\n\n /**\n * @private\n * @type {Array|null}\n */\n this.resolutions_ =\n options.resolutions !== undefined ? options.resolutions : null;\n\n /**\n * @private\n * @type {import(\"../reproj/Image.js\").default}\n */\n this.reprojectedImage_ = null;\n\n /**\n * @private\n * @type {number}\n */\n this.reprojectedRevision_ = 0;\n }\n\n /**\n * @return {Array|null} Resolutions.\n */\n getResolutions() {\n return this.resolutions_;\n }\n\n /**\n * @param {Array|null} resolutions Resolutions.\n */\n setResolutions(resolutions) {\n this.resolutions_ = resolutions;\n }\n\n /**\n * @protected\n * @param {number} resolution Resolution.\n * @return {number} Resolution.\n */\n findNearestResolution(resolution) {\n const resolutions = this.getResolutions();\n if (resolutions) {\n const idx = linearFindNearest(resolutions, resolution, 0);\n resolution = resolutions[idx];\n }\n return resolution;\n }\n\n /**\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {import(\"../ImageBase.js\").default} Single image.\n */\n getImage(extent, resolution, pixelRatio, projection) {\n const sourceProjection = this.getProjection();\n if (\n !sourceProjection ||\n !projection ||\n equivalent(sourceProjection, projection)\n ) {\n if (sourceProjection) {\n projection = sourceProjection;\n }\n return this.getImageInternal(extent, resolution, pixelRatio, projection);\n }\n if (this.reprojectedImage_) {\n if (\n this.reprojectedRevision_ == this.getRevision() &&\n equivalent(this.reprojectedImage_.getProjection(), projection) &&\n this.reprojectedImage_.getResolution() == resolution &&\n equals(this.reprojectedImage_.getExtent(), extent)\n ) {\n return this.reprojectedImage_;\n }\n this.reprojectedImage_.dispose();\n this.reprojectedImage_ = null;\n }\n\n this.reprojectedImage_ = new ReprojImage(\n sourceProjection,\n projection,\n extent,\n resolution,\n pixelRatio,\n (extent, resolution, pixelRatio) =>\n this.getImageInternal(extent, resolution, pixelRatio, sourceProjection),\n this.getInterpolate()\n );\n this.reprojectedRevision_ = this.getRevision();\n\n return this.reprojectedImage_;\n }\n\n /**\n * @abstract\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {import(\"../ImageBase.js\").default} Single image.\n * @protected\n */\n getImageInternal(extent, resolution, pixelRatio, projection) {\n return abstract();\n }\n\n /**\n * Handle image change events.\n * @param {import(\"../events/Event.js\").default} event Event.\n * @protected\n */\n handleImageChange(event) {\n const image = /** @type {import(\"../Image.js\").default} */ (event.target);\n let type;\n switch (image.getState()) {\n case ImageState.LOADING:\n this.loading = true;\n type = ImageSourceEventType.IMAGELOADSTART;\n break;\n case ImageState.LOADED:\n this.loading = false;\n type = ImageSourceEventType.IMAGELOADEND;\n break;\n case ImageState.ERROR:\n this.loading = false;\n type = ImageSourceEventType.IMAGELOADERROR;\n break;\n default:\n return;\n }\n if (this.hasListener(type)) {\n this.dispatchEvent(new ImageSourceEvent(type, image));\n }\n }\n}\n\n/**\n * Default image load function for image sources that use import(\"../Image.js\").Image image\n * instances.\n * @param {import(\"../Image.js\").default} image Image.\n * @param {string} src Source.\n */\nexport function defaultImageLoadFunction(image, src) {\n /** @type {HTMLImageElement|HTMLVideoElement} */ (image.getImage()).src = src;\n}\n\nexport default ImageSource;\n","/**\n * @module ol/uri\n */\n\n/**\n * Appends query parameters to a URI.\n *\n * @param {string} uri The original URI, which may already have query data.\n * @param {!Object} params An object where keys are URI-encoded parameter keys,\n * and the values are arbitrary types or arrays.\n * @return {string} The new URI.\n */\nexport function appendParams(uri, params) {\n const keyParams = [];\n // Skip any null or undefined parameter values\n Object.keys(params).forEach(function (k) {\n if (params[k] !== null && params[k] !== undefined) {\n keyParams.push(k + '=' + encodeURIComponent(params[k]));\n }\n });\n const qs = keyParams.join('&');\n // remove any trailing ? or &\n uri = uri.replace(/[?&]$/, '');\n // append ? or & depending on whether uri has existing parameters\n uri += uri.includes('?') ? '&' : '?';\n return uri + qs;\n}\n","/**\n * @module ol/source/ImageArcGISRest\n */\n\nimport EventType from '../events/EventType.js';\nimport ImageSource, {defaultImageLoadFunction} from './Image.js';\nimport ImageWrapper from '../Image.js';\nimport {appendParams} from '../uri.js';\nimport {assert} from '../asserts.js';\nimport {containsExtent, getHeight, getWidth} from '../extent.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images. Note that\n * you must provide a `crossOrigin` value if you want to access pixel data with the Canvas renderer.\n * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {boolean} [hidpi=true] Use the `ol/Map#pixelRatio` value when requesting the image from\n * the remote server.\n * @property {import(\"../Image.js\").LoadFunction} [imageLoadFunction] Optional function to load an image given\n * a URL.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling. By default,\n * linear interpolation is used when resampling. Set to false to use the nearest neighbor instead.\n * @property {Object} [params] ArcGIS Rest parameters. This field is optional. Service\n * defaults will be used for any fields not specified. `FORMAT` is `PNG32` by default. `F` is\n * `IMAGE` by default. `TRANSPARENT` is `true` by default. `BBOX`, `SIZE`, `BBOXSR`, and `IMAGESR`\n * will be set dynamically. Set `LAYERS` to override the default service layer visibility. See\n * https://developers.arcgis.com/rest/services-reference/export-map.htm\n * for further reference.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection. Default is the view projection.\n * The projection code must contain a numeric end portion separated by :\n * or the entire code must form a valid ArcGIS SpatialReference definition.\n * @property {number} [ratio=1.5] Ratio. `1` means image requests are the size of the map viewport,\n * `2` means twice the size of the map viewport, and so on.\n * @property {Array} [resolutions] Resolutions. If specified, requests will be made for\n * these resolutions only.\n * @property {string} [url] ArcGIS Rest service URL for a Map Service or Image Service. The url\n * should include /MapServer or /ImageServer.\n */\n\n/**\n * @classdesc\n * Source for data from ArcGIS Rest services providing single, untiled images.\n * Useful when underlying map service has labels.\n *\n * If underlying map service is not using labels,\n * take advantage of ol image caching and use\n * {@link module:ol/source/TileArcGISRest~TileArcGISRest} data source.\n *\n * @fires module:ol/source/Image.ImageSourceEvent\n * @api\n */\nclass ImageArcGISRest extends ImageSource {\n /**\n * @param {Options} [options] Image ArcGIS Rest Options.\n */\n constructor(options) {\n options = options ? options : {};\n\n super({\n attributions: options.attributions,\n interpolate: options.interpolate,\n projection: options.projection,\n resolutions: options.resolutions,\n });\n\n /**\n * @private\n * @type {?string}\n */\n this.crossOrigin_ =\n options.crossOrigin !== undefined ? options.crossOrigin : null;\n\n /**\n * @private\n * @type {boolean}\n */\n this.hidpi_ = options.hidpi !== undefined ? options.hidpi : true;\n\n /**\n * @private\n * @type {string|undefined}\n */\n this.url_ = options.url;\n\n /**\n * @private\n * @type {import(\"../Image.js\").LoadFunction}\n */\n this.imageLoadFunction_ =\n options.imageLoadFunction !== undefined\n ? options.imageLoadFunction\n : defaultImageLoadFunction;\n\n /**\n * @private\n * @type {!Object}\n */\n this.params_ = options.params || {};\n\n /**\n * @private\n * @type {import(\"../Image.js\").default}\n */\n this.image_ = null;\n\n /**\n * @private\n * @type {import(\"../size.js\").Size}\n */\n this.imageSize_ = [0, 0];\n\n /**\n * @private\n * @type {number}\n */\n this.renderedRevision_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.ratio_ = options.ratio !== undefined ? options.ratio : 1.5;\n }\n\n /**\n * Get the user-provided params, i.e. those passed to the constructor through\n * the \"params\" option, and possibly updated using the updateParams method.\n * @return {Object} Params.\n * @api\n */\n getParams() {\n return this.params_;\n }\n\n /**\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {import(\"../Image.js\").default} Single image.\n */\n getImageInternal(extent, resolution, pixelRatio, projection) {\n if (this.url_ === undefined) {\n return null;\n }\n\n resolution = this.findNearestResolution(resolution);\n pixelRatio = this.hidpi_ ? pixelRatio : 1;\n\n const image = this.image_;\n if (\n image &&\n this.renderedRevision_ == this.getRevision() &&\n image.getResolution() == resolution &&\n image.getPixelRatio() == pixelRatio &&\n containsExtent(image.getExtent(), extent)\n ) {\n return image;\n }\n\n const params = {\n 'F': 'image',\n 'FORMAT': 'PNG32',\n 'TRANSPARENT': true,\n };\n Object.assign(params, this.params_);\n\n extent = extent.slice();\n const centerX = (extent[0] + extent[2]) / 2;\n const centerY = (extent[1] + extent[3]) / 2;\n if (this.ratio_ != 1) {\n const halfWidth = (this.ratio_ * getWidth(extent)) / 2;\n const halfHeight = (this.ratio_ * getHeight(extent)) / 2;\n extent[0] = centerX - halfWidth;\n extent[1] = centerY - halfHeight;\n extent[2] = centerX + halfWidth;\n extent[3] = centerY + halfHeight;\n }\n\n const imageResolution = resolution / pixelRatio;\n\n // Compute an integer width and height.\n const width = Math.ceil(getWidth(extent) / imageResolution);\n const height = Math.ceil(getHeight(extent) / imageResolution);\n\n // Modify the extent to match the integer width and height.\n extent[0] = centerX - (imageResolution * width) / 2;\n extent[2] = centerX + (imageResolution * width) / 2;\n extent[1] = centerY - (imageResolution * height) / 2;\n extent[3] = centerY + (imageResolution * height) / 2;\n\n this.imageSize_[0] = width;\n this.imageSize_[1] = height;\n\n const url = this.getRequestUrl_(\n extent,\n this.imageSize_,\n pixelRatio,\n projection,\n params\n );\n\n this.image_ = new ImageWrapper(\n extent,\n resolution,\n pixelRatio,\n url,\n this.crossOrigin_,\n this.imageLoadFunction_\n );\n\n this.renderedRevision_ = this.getRevision();\n\n this.image_.addEventListener(\n EventType.CHANGE,\n this.handleImageChange.bind(this)\n );\n\n return this.image_;\n }\n\n /**\n * Return the image load function of the source.\n * @return {import(\"../Image.js\").LoadFunction} The image load function.\n * @api\n */\n getImageLoadFunction() {\n return this.imageLoadFunction_;\n }\n\n /**\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {import(\"../size.js\").Size} size Size.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @param {Object} params Params.\n * @return {string} Request URL.\n * @private\n */\n getRequestUrl_(extent, size, pixelRatio, projection, params) {\n // ArcGIS Server only wants the numeric portion of the projection ID.\n // (if there is no numeric portion the entire projection code must\n // form a valid ArcGIS SpatialReference definition).\n const srid = projection\n .getCode()\n .split(/:(?=\\d+$)/)\n .pop();\n\n params['SIZE'] = size[0] + ',' + size[1];\n params['BBOX'] = extent.join(',');\n params['BBOXSR'] = srid;\n params['IMAGESR'] = srid;\n params['DPI'] = Math.round(90 * pixelRatio);\n\n const url = this.url_;\n\n const modifiedUrl = url\n .replace(/MapServer\\/?$/, 'MapServer/export')\n .replace(/ImageServer\\/?$/, 'ImageServer/exportImage');\n if (modifiedUrl == url) {\n assert(false, 50); // `options.featureTypes` should be an Array\n }\n return appendParams(modifiedUrl, params);\n }\n\n /**\n * Return the URL used for this ArcGIS source.\n * @return {string|undefined} URL.\n * @api\n */\n getUrl() {\n return this.url_;\n }\n\n /**\n * Set the image load function of the source.\n * @param {import(\"../Image.js\").LoadFunction} imageLoadFunction Image load function.\n * @api\n */\n setImageLoadFunction(imageLoadFunction) {\n this.image_ = null;\n this.imageLoadFunction_ = imageLoadFunction;\n this.changed();\n }\n\n /**\n * Set the URL to use for requests.\n * @param {string|undefined} url URL.\n * @api\n */\n setUrl(url) {\n if (url != this.url_) {\n this.url_ = url;\n this.image_ = null;\n this.changed();\n }\n }\n\n /**\n * Update the user-provided params.\n * @param {Object} params Params.\n * @api\n */\n updateParams(params) {\n Object.assign(this.params_, params);\n this.image_ = null;\n this.changed();\n }\n}\n\nexport default ImageArcGISRest;\n","/**\n * @module ol/source/ImageCanvas\n */\n\nimport ImageCanvas from '../ImageCanvas.js';\nimport ImageSource from './Image.js';\nimport {\n containsExtent,\n getHeight,\n getWidth,\n scaleFromCenter,\n} from '../extent.js';\n\n/**\n * A function returning the canvas element (`{HTMLCanvasElement}`)\n * used by the source as an image. The arguments passed to the function are:\n * {@link module:ol/extent~Extent} the image extent, `{number}` the image resolution,\n * `{number}` the pixel ratio of the map, {@link module:ol/size~Size} the image size,\n * and {@link module:ol/proj/Projection~Projection} the image projection. The canvas returned by\n * this function is cached by the source. The this keyword inside the function\n * references the {@link module:ol/source/ImageCanvas~ImageCanvasSource}.\n *\n * @typedef {function(this:import(\"../ImageCanvas.js\").default, import(\"../extent.js\").Extent, number,\n * number, import(\"../size.js\").Size, import(\"../proj/Projection.js\").default): HTMLCanvasElement} FunctionType\n */\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {FunctionType} [canvasFunction] Canvas function.\n * The function returning the canvas element used by the source\n * as an image. The arguments passed to the function are: {@link import(\"../extent.js\").Extent} the\n * image extent, `{number}` the image resolution, `{number}` the pixel ratio of the map,\n * {@link import(\"../size.js\").Size} the image size, and {@link import(\"../proj/Projection.js\").default} the image\n * projection. The canvas returned by this function is cached by the source. If\n * the value returned by the function is later changed then\n * `changed` should be called on the source for the source to\n * invalidate the current cached image. See: {@link module:ol/Observable~Observable#changed}\n * @property {boolean} [interpolate=true] Use interpolated values when resampling. By default,\n * linear interpolation is used when resampling. Set to false to use the nearest neighbor instead.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection. Default is the view projection.\n * @property {number} [ratio=1.5] Ratio. 1 means canvases are the size of the map viewport, 2 means twice the\n * width and height of the map viewport, and so on. Must be `1` or higher.\n * @property {Array} [resolutions] Resolutions.\n * If specified, new canvases will be created for these resolutions\n * @property {import(\"./Source.js\").State} [state] Source state.\n */\n\n/**\n * @classdesc\n * Base class for image sources where a canvas element is the image.\n * @api\n */\nclass ImageCanvasSource extends ImageSource {\n /**\n * @param {Options} [options] ImageCanvas options.\n */\n constructor(options) {\n options = options ? options : {};\n\n super({\n attributions: options.attributions,\n interpolate: options.interpolate,\n projection: options.projection,\n resolutions: options.resolutions,\n state: options.state,\n });\n\n /**\n * @private\n * @type {FunctionType}\n */\n this.canvasFunction_ = options.canvasFunction;\n\n /**\n * @private\n * @type {import(\"../ImageCanvas.js\").default}\n */\n this.canvas_ = null;\n\n /**\n * @private\n * @type {number}\n */\n this.renderedRevision_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.ratio_ = options.ratio !== undefined ? options.ratio : 1.5;\n }\n\n /**\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {import(\"../ImageCanvas.js\").default} Single image.\n */\n getImageInternal(extent, resolution, pixelRatio, projection) {\n resolution = this.findNearestResolution(resolution);\n\n let canvas = this.canvas_;\n if (\n canvas &&\n this.renderedRevision_ == this.getRevision() &&\n canvas.getResolution() == resolution &&\n canvas.getPixelRatio() == pixelRatio &&\n containsExtent(canvas.getExtent(), extent)\n ) {\n return canvas;\n }\n\n extent = extent.slice();\n scaleFromCenter(extent, this.ratio_);\n const width = getWidth(extent) / resolution;\n const height = getHeight(extent) / resolution;\n const size = [width * pixelRatio, height * pixelRatio];\n\n const canvasElement = this.canvasFunction_.call(\n this,\n extent,\n resolution,\n pixelRatio,\n size,\n projection\n );\n if (canvasElement) {\n canvas = new ImageCanvas(extent, resolution, pixelRatio, canvasElement);\n }\n this.canvas_ = canvas;\n this.renderedRevision_ = this.getRevision();\n\n return canvas;\n }\n}\n\nexport default ImageCanvasSource;\n","/**\n * @module ol/source/ImageMapGuide\n */\n\nimport EventType from '../events/EventType.js';\nimport ImageSource, {defaultImageLoadFunction} from './Image.js';\nimport ImageWrapper from '../Image.js';\nimport {appendParams} from '../uri.js';\nimport {\n containsExtent,\n getCenter,\n getHeight,\n getWidth,\n scaleFromCenter,\n} from '../extent.js';\n\n/**\n * @typedef {Object} Options\n * @property {string} [url] The mapagent url.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images. Note that\n * you must provide a `crossOrigin` value if you want to access pixel data with the Canvas renderer.\n * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {number} [displayDpi=96] The display resolution.\n * @property {number} [metersPerUnit=1] The meters-per-unit value.\n * @property {boolean} [hidpi=true] Use the `ol/Map#pixelRatio` value when requesting\n * the image from the remote server.\n * @property {boolean} [useOverlay] If `true`, will use `GETDYNAMICMAPOVERLAYIMAGE`.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection. Default is the view projection.\n * @property {number} [ratio=1] Ratio. `1` means image requests are the size of the map viewport, `2` means\n * twice the width and height of the map viewport, and so on. Must be `1` or higher.\n * @property {Array} [resolutions] Resolutions.\n * If specified, requests will be made for these resolutions only.\n * @property {import(\"../Image.js\").LoadFunction} [imageLoadFunction] Optional function to load an image given a URL.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling. By default,\n * linear interpolation is used when resampling. Set to false to use the nearest neighbor instead.\n * @property {Object} [params] Additional parameters.\n */\n\n/**\n * @classdesc\n * Source for images from Mapguide servers\n *\n * @fires module:ol/source/Image.ImageSourceEvent\n * @api\n */\nclass ImageMapGuide extends ImageSource {\n /**\n * @param {Options} options ImageMapGuide options.\n */\n constructor(options) {\n super({\n interpolate: options.interpolate,\n projection: options.projection,\n resolutions: options.resolutions,\n });\n\n /**\n * @private\n * @type {?string}\n */\n this.crossOrigin_ =\n options.crossOrigin !== undefined ? options.crossOrigin : null;\n\n /**\n * @private\n * @type {number}\n */\n this.displayDpi_ =\n options.displayDpi !== undefined ? options.displayDpi : 96;\n\n /**\n * @private\n * @type {!Object}\n */\n this.params_ = options.params || {};\n\n /**\n * @private\n * @type {string|undefined}\n */\n this.url_ = options.url;\n\n /**\n * @private\n * @type {import(\"../Image.js\").LoadFunction}\n */\n this.imageLoadFunction_ =\n options.imageLoadFunction !== undefined\n ? options.imageLoadFunction\n : defaultImageLoadFunction;\n\n /**\n * @private\n * @type {boolean}\n */\n this.hidpi_ = options.hidpi !== undefined ? options.hidpi : true;\n\n /**\n * @private\n * @type {number}\n */\n this.metersPerUnit_ =\n options.metersPerUnit !== undefined ? options.metersPerUnit : 1;\n\n /**\n * @private\n * @type {number}\n */\n this.ratio_ = options.ratio !== undefined ? options.ratio : 1;\n\n /**\n * @private\n * @type {boolean}\n */\n this.useOverlay_ =\n options.useOverlay !== undefined ? options.useOverlay : false;\n\n /**\n * @private\n * @type {import(\"../Image.js\").default}\n */\n this.image_ = null;\n\n /**\n * @private\n * @type {number}\n */\n this.renderedRevision_ = 0;\n }\n\n /**\n * Get the user-provided params, i.e. those passed to the constructor through\n * the \"params\" option, and possibly updated using the updateParams method.\n * @return {Object} Params.\n * @api\n */\n getParams() {\n return this.params_;\n }\n\n /**\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {import(\"../Image.js\").default} Single image.\n */\n getImageInternal(extent, resolution, pixelRatio, projection) {\n resolution = this.findNearestResolution(resolution);\n pixelRatio = this.hidpi_ ? pixelRatio : 1;\n\n let image = this.image_;\n if (\n image &&\n this.renderedRevision_ == this.getRevision() &&\n image.getResolution() == resolution &&\n image.getPixelRatio() == pixelRatio &&\n containsExtent(image.getExtent(), extent)\n ) {\n return image;\n }\n\n if (this.ratio_ != 1) {\n extent = extent.slice();\n scaleFromCenter(extent, this.ratio_);\n }\n const width = getWidth(extent) / resolution;\n const height = getHeight(extent) / resolution;\n const size = [width * pixelRatio, height * pixelRatio];\n\n if (this.url_ !== undefined) {\n const imageUrl = this.getUrl(\n this.url_,\n this.params_,\n extent,\n size,\n projection\n );\n image = new ImageWrapper(\n extent,\n resolution,\n pixelRatio,\n imageUrl,\n this.crossOrigin_,\n this.imageLoadFunction_\n );\n image.addEventListener(\n EventType.CHANGE,\n this.handleImageChange.bind(this)\n );\n } else {\n image = null;\n }\n this.image_ = image;\n this.renderedRevision_ = this.getRevision();\n\n return image;\n }\n\n /**\n * Return the image load function of the source.\n * @return {import(\"../Image.js\").LoadFunction} The image load function.\n * @api\n */\n getImageLoadFunction() {\n return this.imageLoadFunction_;\n }\n\n /**\n * Update the user-provided params.\n * @param {Object} params Params.\n * @api\n */\n updateParams(params) {\n Object.assign(this.params_, params);\n this.changed();\n }\n\n /**\n * @param {string} baseUrl The mapagent url.\n * @param {Object} params Request parameters.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {import(\"../size.js\").Size} size Size.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {string} The mapagent map image request URL.\n */\n getUrl(baseUrl, params, extent, size, projection) {\n const scale = getScale(extent, size, this.metersPerUnit_, this.displayDpi_);\n const center = getCenter(extent);\n const baseParams = {\n 'OPERATION': this.useOverlay_\n ? 'GETDYNAMICMAPOVERLAYIMAGE'\n : 'GETMAPIMAGE',\n 'VERSION': '2.0.0',\n 'LOCALE': 'en',\n 'CLIENTAGENT': 'ol/source/ImageMapGuide source',\n 'CLIP': '1',\n 'SETDISPLAYDPI': this.displayDpi_,\n 'SETDISPLAYWIDTH': Math.round(size[0]),\n 'SETDISPLAYHEIGHT': Math.round(size[1]),\n 'SETVIEWSCALE': scale,\n 'SETVIEWCENTERX': center[0],\n 'SETVIEWCENTERY': center[1],\n };\n Object.assign(baseParams, params);\n return appendParams(baseUrl, baseParams);\n }\n\n /**\n * Set the image load function of the MapGuide source.\n * @param {import(\"../Image.js\").LoadFunction} imageLoadFunction Image load function.\n * @api\n */\n setImageLoadFunction(imageLoadFunction) {\n this.image_ = null;\n this.imageLoadFunction_ = imageLoadFunction;\n this.changed();\n }\n}\n\n/**\n * @param {import(\"../extent.js\").Extent} extent The map extents.\n * @param {import(\"../size.js\").Size} size The viewport size.\n * @param {number} metersPerUnit The meters-per-unit value.\n * @param {number} dpi The display resolution.\n * @return {number} The computed map scale.\n */\nfunction getScale(extent, size, metersPerUnit, dpi) {\n const mcsW = getWidth(extent);\n const mcsH = getHeight(extent);\n const devW = size[0];\n const devH = size[1];\n const mpp = 0.0254 / dpi;\n if (devH * mcsW > devW * mcsH) {\n return (mcsW * metersPerUnit) / (devW * mpp); // width limited\n }\n return (mcsH * metersPerUnit) / (devH * mpp); // height limited\n}\n\nexport default ImageMapGuide;\n","/**\n * @module ol/source/ImageStatic\n */\n\nimport EventType from '../events/EventType.js';\nimport ImageSource, {defaultImageLoadFunction} from './Image.js';\nimport ImageState from '../ImageState.js';\nimport ImageWrapper from '../Image.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {getHeight, getWidth, intersects} from '../extent.js';\nimport {get as getProjection} from '../proj.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images. Note that\n * you must provide a `crossOrigin` value if you want to access pixel data with the Canvas renderer.\n * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {import(\"../extent.js\").Extent} [imageExtent] Extent of the image in map coordinates.\n * This is the [left, bottom, right, top] map coordinates of your image.\n * @property {import(\"../Image.js\").LoadFunction} [imageLoadFunction] Optional function to load an image given a URL.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling. By default,\n * linear interpolation is used when resampling. Set to false to use the nearest neighbor instead.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection. Default is the view projection.\n * @property {import(\"../size.js\").Size} [imageSize] Size of the image in pixels. Usually the image size is auto-detected, so this\n * only needs to be set if auto-detection fails for some reason.\n * @property {string} url Image URL.\n */\n\n/**\n * @classdesc\n * A layer source for displaying a single, static image.\n * @api\n */\nclass Static extends ImageSource {\n /**\n * @param {Options} options ImageStatic options.\n */\n constructor(options) {\n const crossOrigin =\n options.crossOrigin !== undefined ? options.crossOrigin : null;\n\n const /** @type {import(\"../Image.js\").LoadFunction} */ imageLoadFunction =\n options.imageLoadFunction !== undefined\n ? options.imageLoadFunction\n : defaultImageLoadFunction;\n\n super({\n attributions: options.attributions,\n interpolate: options.interpolate,\n projection: getProjection(options.projection),\n });\n\n /**\n * @private\n * @type {string}\n */\n this.url_ = options.url;\n\n /**\n * @private\n * @type {import(\"../extent.js\").Extent}\n */\n this.imageExtent_ = options.imageExtent;\n\n /**\n * @private\n * @type {import(\"../Image.js\").default}\n */\n this.image_ = new ImageWrapper(\n this.imageExtent_,\n undefined,\n 1,\n this.url_,\n crossOrigin,\n imageLoadFunction\n );\n\n /**\n * @private\n * @type {import(\"../size.js\").Size|null}\n */\n this.imageSize_ = options.imageSize ? options.imageSize : null;\n\n this.image_.addEventListener(\n EventType.CHANGE,\n this.handleImageChange.bind(this)\n );\n }\n\n /**\n * Returns the image extent\n * @return {import(\"../extent.js\").Extent} image extent.\n * @api\n */\n getImageExtent() {\n return this.imageExtent_;\n }\n\n /**\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {import(\"../Image.js\").default} Single image.\n */\n getImageInternal(extent, resolution, pixelRatio, projection) {\n if (intersects(extent, this.image_.getExtent())) {\n return this.image_;\n }\n return null;\n }\n\n /**\n * Return the URL used for this image source.\n * @return {string} URL.\n * @api\n */\n getUrl() {\n return this.url_;\n }\n\n /**\n * @param {import(\"../events/Event.js\").default} evt Event.\n */\n handleImageChange(evt) {\n if (this.image_.getState() == ImageState.LOADED) {\n const imageExtent = this.image_.getExtent();\n const image = this.image_.getImage();\n let imageWidth, imageHeight;\n if (this.imageSize_) {\n imageWidth = this.imageSize_[0];\n imageHeight = this.imageSize_[1];\n } else {\n imageWidth = image.width;\n imageHeight = image.height;\n }\n const extentWidth = getWidth(imageExtent);\n const extentHeight = getHeight(imageExtent);\n const xResolution = extentWidth / imageWidth;\n const yResolution = extentHeight / imageHeight;\n let targetWidth = imageWidth;\n let targetHeight = imageHeight;\n if (xResolution > yResolution) {\n targetWidth = Math.round(extentWidth / yResolution);\n } else {\n targetHeight = Math.round(extentHeight / xResolution);\n }\n if (targetWidth !== imageWidth || targetHeight !== imageHeight) {\n const context = createCanvasContext2D(targetWidth, targetHeight);\n if (!this.getInterpolate()) {\n context.imageSmoothingEnabled = false;\n }\n const canvas = context.canvas;\n context.drawImage(\n image,\n 0,\n 0,\n imageWidth,\n imageHeight,\n 0,\n 0,\n canvas.width,\n canvas.height\n );\n this.image_.setImage(canvas);\n }\n }\n super.handleImageChange(evt);\n }\n}\n\nexport default Static;\n","/**\n * @module ol/source/wms\n */\n\n/**\n * Default WMS version.\n * @type {string}\n */\nexport const DEFAULT_VERSION = '1.3.0';\n\n/**\n * @api\n * @typedef {'carmentaserver' | 'geoserver' | 'mapserver' | 'qgis'} ServerType\n * Set the server type to use implementation-specific parameters beyond the WMS specification.\n * - `'carmentaserver'`: HiDPI support for [Carmenta Server](https://www.carmenta.com/en/products/carmenta-server)\n * - `'geoserver'`: HiDPI support for [GeoServer](https://geoserver.org/)\n * - `'mapserver'`: HiDPI support for [MapServer](https://mapserver.org/)\n * - `'qgis'`: HiDPI support for [QGIS](https://qgis.org/)\n */\n","/**\n * @module ol/source/ImageWMS\n */\n\nimport EventType from '../events/EventType.js';\nimport ImageSource, {defaultImageLoadFunction} from './Image.js';\nimport ImageWrapper from '../Image.js';\nimport {DEFAULT_VERSION} from './wms.js';\nimport {appendParams} from '../uri.js';\nimport {assert} from '../asserts.js';\nimport {calculateSourceResolution} from '../reproj.js';\nimport {ceil, floor, round} from '../math.js';\nimport {compareVersions} from '../string.js';\nimport {\n containsExtent,\n getCenter,\n getForViewAndSize,\n getHeight,\n getWidth,\n} from '../extent.js';\nimport {get as getProjection, transform} from '../proj.js';\n\n/**\n * Number of decimal digits to consider in integer values when rounding.\n * @type {number}\n */\nconst DECIMALS = 4;\n\n/**\n * @const\n * @type {import(\"../size.js\").Size}\n */\nconst GETFEATUREINFO_IMAGE_SIZE = [101, 101];\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images. Note that\n * you must provide a `crossOrigin` value if you want to access pixel data with the Canvas renderer.\n * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {boolean} [hidpi=true] Use the `ol/Map#pixelRatio` value when requesting\n * the image from the remote server.\n * @property {import(\"./wms.js\").ServerType} [serverType] The type of\n * the remote WMS server: `mapserver`, `geoserver`, `carmentaserver`, or `qgis`.\n * Only needed if `hidpi` is `true`.\n * @property {import(\"../Image.js\").LoadFunction} [imageLoadFunction] Optional function to load an image given a URL.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling. By default,\n * linear interpolation is used when resampling. Set to false to use the nearest neighbor instead.\n * @property {Object} [params] WMS request parameters.\n * At least a `LAYERS` param is required. `STYLES` is\n * `''` by default. `VERSION` is `1.3.0` by default. `WIDTH`, `HEIGHT`, `BBOX`\n * and `CRS` (`SRS` for WMS version < 1.3.0) will be set dynamically.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection. Default is the view projection.\n * @property {number} [ratio=1.5] Ratio. `1` means image requests are the size of the map viewport, `2` means\n * twice the width and height of the map viewport, and so on. Must be `1` or\n * higher.\n * @property {Array} [resolutions] Resolutions.\n * If specified, requests will be made for these resolutions only.\n * @property {string} [url] WMS service URL.\n */\n\n/**\n * @classdesc\n * Source for WMS servers providing single, untiled images.\n *\n * @fires module:ol/source/Image.ImageSourceEvent\n * @api\n */\nclass ImageWMS extends ImageSource {\n /**\n * @param {Options} [options] ImageWMS options.\n */\n constructor(options) {\n options = options ? options : {};\n\n super({\n attributions: options.attributions,\n interpolate: options.interpolate,\n projection: options.projection,\n resolutions: options.resolutions,\n });\n\n /**\n * @private\n * @type {?string}\n */\n this.crossOrigin_ =\n options.crossOrigin !== undefined ? options.crossOrigin : null;\n\n /**\n * @private\n * @type {string|undefined}\n */\n this.url_ = options.url;\n\n /**\n * @private\n * @type {import(\"../Image.js\").LoadFunction}\n */\n this.imageLoadFunction_ =\n options.imageLoadFunction !== undefined\n ? options.imageLoadFunction\n : defaultImageLoadFunction;\n\n /**\n * @private\n * @type {!Object}\n */\n this.params_ = Object.assign({}, options.params);\n\n /**\n * @private\n * @type {boolean}\n */\n this.v13_ = true;\n this.updateV13_();\n\n /**\n * @private\n * @type {import(\"./wms.js\").ServerType}\n */\n this.serverType_ = options.serverType;\n\n /**\n * @private\n * @type {boolean}\n */\n this.hidpi_ = options.hidpi !== undefined ? options.hidpi : true;\n\n /**\n * @private\n * @type {import(\"../Image.js\").default}\n */\n this.image_ = null;\n\n /**\n * @private\n * @type {import(\"../size.js\").Size}\n */\n this.imageSize_ = [0, 0];\n\n /**\n * @private\n * @type {number}\n */\n this.renderedRevision_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.ratio_ = options.ratio !== undefined ? options.ratio : 1.5;\n }\n\n /**\n * Return the GetFeatureInfo URL for the passed coordinate, resolution, and\n * projection. Return `undefined` if the GetFeatureInfo URL cannot be\n * constructed.\n * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {number} resolution Resolution.\n * @param {import(\"../proj.js\").ProjectionLike} projection Projection.\n * @param {!Object} params GetFeatureInfo params. `INFO_FORMAT` at least should\n * be provided. If `QUERY_LAYERS` is not provided then the layers specified\n * in the `LAYERS` parameter will be used. `VERSION` should not be\n * specified here.\n * @return {string|undefined} GetFeatureInfo URL.\n * @api\n */\n getFeatureInfoUrl(coordinate, resolution, projection, params) {\n if (this.url_ === undefined) {\n return undefined;\n }\n const projectionObj = getProjection(projection);\n const sourceProjectionObj = this.getProjection();\n\n if (sourceProjectionObj && sourceProjectionObj !== projectionObj) {\n resolution = calculateSourceResolution(\n sourceProjectionObj,\n projectionObj,\n coordinate,\n resolution\n );\n coordinate = transform(coordinate, projectionObj, sourceProjectionObj);\n }\n\n const extent = getForViewAndSize(\n coordinate,\n resolution,\n 0,\n GETFEATUREINFO_IMAGE_SIZE\n );\n\n const baseParams = {\n 'SERVICE': 'WMS',\n 'VERSION': DEFAULT_VERSION,\n 'REQUEST': 'GetFeatureInfo',\n 'FORMAT': 'image/png',\n 'TRANSPARENT': true,\n 'QUERY_LAYERS': this.params_['LAYERS'],\n };\n Object.assign(baseParams, this.params_, params);\n\n const x = floor((coordinate[0] - extent[0]) / resolution, DECIMALS);\n const y = floor((extent[3] - coordinate[1]) / resolution, DECIMALS);\n baseParams[this.v13_ ? 'I' : 'X'] = x;\n baseParams[this.v13_ ? 'J' : 'Y'] = y;\n\n return this.getRequestUrl_(\n extent,\n GETFEATUREINFO_IMAGE_SIZE,\n 1,\n sourceProjectionObj || projectionObj,\n baseParams\n );\n }\n\n /**\n * Return the GetLegendGraphic URL, optionally optimized for the passed\n * resolution and possibly including any passed specific parameters. Returns\n * `undefined` if the GetLegendGraphic URL cannot be constructed.\n *\n * @param {number} [resolution] Resolution. If set to undefined, `SCALE`\n * will not be calculated and included in URL.\n * @param {Object} [params] GetLegendGraphic params. If `LAYER` is set, the\n * request is generated for this wms layer, else it will try to use the\n * configured wms layer. Default `FORMAT` is `image/png`.\n * `VERSION` should not be specified here.\n * @return {string|undefined} GetLegendGraphic URL.\n * @api\n */\n getLegendUrl(resolution, params) {\n if (this.url_ === undefined) {\n return undefined;\n }\n\n const baseParams = {\n 'SERVICE': 'WMS',\n 'VERSION': DEFAULT_VERSION,\n 'REQUEST': 'GetLegendGraphic',\n 'FORMAT': 'image/png',\n };\n\n if (params === undefined || params['LAYER'] === undefined) {\n const layers = this.params_.LAYERS;\n const isSingleLayer = !Array.isArray(layers) || layers.length === 1;\n if (!isSingleLayer) {\n return undefined;\n }\n baseParams['LAYER'] = layers;\n }\n\n if (resolution !== undefined) {\n const mpu = this.getProjection()\n ? this.getProjection().getMetersPerUnit()\n : 1;\n const pixelSize = 0.00028;\n baseParams['SCALE'] = (resolution * mpu) / pixelSize;\n }\n\n Object.assign(baseParams, params);\n\n return appendParams(/** @type {string} */ (this.url_), baseParams);\n }\n\n /**\n * Get the user-provided params, i.e. those passed to the constructor through\n * the \"params\" option, and possibly updated using the updateParams method.\n * @return {Object} Params.\n * @api\n */\n getParams() {\n return this.params_;\n }\n\n /**\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {import(\"../Image.js\").default} Single image.\n */\n getImageInternal(extent, resolution, pixelRatio, projection) {\n if (this.url_ === undefined) {\n return null;\n }\n\n resolution = this.findNearestResolution(resolution);\n\n if (pixelRatio != 1 && (!this.hidpi_ || this.serverType_ === undefined)) {\n pixelRatio = 1;\n }\n\n const imageResolution = resolution / pixelRatio;\n\n const center = getCenter(extent);\n const viewWidth = ceil(getWidth(extent) / imageResolution, DECIMALS);\n const viewHeight = ceil(getHeight(extent) / imageResolution, DECIMALS);\n const viewExtent = getForViewAndSize(center, imageResolution, 0, [\n viewWidth,\n viewHeight,\n ]);\n const requestWidth = ceil(\n (this.ratio_ * getWidth(extent)) / imageResolution,\n DECIMALS\n );\n const requestHeight = ceil(\n (this.ratio_ * getHeight(extent)) / imageResolution,\n DECIMALS\n );\n const requestExtent = getForViewAndSize(center, imageResolution, 0, [\n requestWidth,\n requestHeight,\n ]);\n\n const image = this.image_;\n if (\n image &&\n this.renderedRevision_ == this.getRevision() &&\n image.getResolution() == resolution &&\n image.getPixelRatio() == pixelRatio &&\n containsExtent(image.getExtent(), viewExtent)\n ) {\n return image;\n }\n\n const params = {\n 'SERVICE': 'WMS',\n 'VERSION': DEFAULT_VERSION,\n 'REQUEST': 'GetMap',\n 'FORMAT': 'image/png',\n 'TRANSPARENT': true,\n };\n Object.assign(params, this.params_);\n\n this.imageSize_[0] = round(\n getWidth(requestExtent) / imageResolution,\n DECIMALS\n );\n this.imageSize_[1] = round(\n getHeight(requestExtent) / imageResolution,\n DECIMALS\n );\n\n const url = this.getRequestUrl_(\n requestExtent,\n this.imageSize_,\n pixelRatio,\n projection,\n params\n );\n\n this.image_ = new ImageWrapper(\n requestExtent,\n resolution,\n pixelRatio,\n url,\n this.crossOrigin_,\n this.imageLoadFunction_\n );\n\n this.renderedRevision_ = this.getRevision();\n\n this.image_.addEventListener(\n EventType.CHANGE,\n this.handleImageChange.bind(this)\n );\n\n return this.image_;\n }\n\n /**\n * Return the image load function of the source.\n * @return {import(\"../Image.js\").LoadFunction} The image load function.\n * @api\n */\n getImageLoadFunction() {\n return this.imageLoadFunction_;\n }\n\n /**\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {import(\"../size.js\").Size} size Size.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @param {Object} params Params.\n * @return {string} Request URL.\n * @private\n */\n getRequestUrl_(extent, size, pixelRatio, projection, params) {\n assert(this.url_ !== undefined, 9); // `url` must be configured or set using `#setUrl()`\n\n params[this.v13_ ? 'CRS' : 'SRS'] = projection.getCode();\n\n if (!('STYLES' in this.params_)) {\n params['STYLES'] = '';\n }\n\n if (pixelRatio != 1) {\n switch (this.serverType_) {\n case 'geoserver':\n const dpi = (90 * pixelRatio + 0.5) | 0;\n if ('FORMAT_OPTIONS' in params) {\n params['FORMAT_OPTIONS'] += ';dpi:' + dpi;\n } else {\n params['FORMAT_OPTIONS'] = 'dpi:' + dpi;\n }\n break;\n case 'mapserver':\n params['MAP_RESOLUTION'] = 90 * pixelRatio;\n break;\n case 'carmentaserver':\n case 'qgis':\n params['DPI'] = 90 * pixelRatio;\n break;\n default: // Unknown `serverType` configured\n assert(false, 8);\n break;\n }\n }\n\n params['WIDTH'] = size[0];\n params['HEIGHT'] = size[1];\n\n const axisOrientation = projection.getAxisOrientation();\n let bbox;\n if (this.v13_ && axisOrientation.substr(0, 2) == 'ne') {\n bbox = [extent[1], extent[0], extent[3], extent[2]];\n } else {\n bbox = extent;\n }\n params['BBOX'] = bbox.join(',');\n\n return appendParams(/** @type {string} */ (this.url_), params);\n }\n\n /**\n * Return the URL used for this WMS source.\n * @return {string|undefined} URL.\n * @api\n */\n getUrl() {\n return this.url_;\n }\n\n /**\n * Set the image load function of the source.\n * @param {import(\"../Image.js\").LoadFunction} imageLoadFunction Image load function.\n * @api\n */\n setImageLoadFunction(imageLoadFunction) {\n this.image_ = null;\n this.imageLoadFunction_ = imageLoadFunction;\n this.changed();\n }\n\n /**\n * Set the URL to use for requests.\n * @param {string|undefined} url URL.\n * @api\n */\n setUrl(url) {\n if (url != this.url_) {\n this.url_ = url;\n this.image_ = null;\n this.changed();\n }\n }\n\n /**\n * Update the user-provided params.\n * @param {Object} params Params.\n * @api\n */\n updateParams(params) {\n Object.assign(this.params_, params);\n this.updateV13_();\n this.image_ = null;\n this.changed();\n }\n\n /**\n * @private\n */\n updateV13_() {\n const version = this.params_['VERSION'] || DEFAULT_VERSION;\n this.v13_ = compareVersions(version, '1.3') >= 0;\n }\n}\n\nexport default ImageWMS;\n","/**\n * @module ol/source/OSM\n */\n\nimport XYZ from './XYZ.js';\n\n/**\n * The attribution containing a link to the OpenStreetMap Copyright and License\n * page.\n * @const\n * @type {string}\n * @api\n */\nexport const ATTRIBUTION =\n '© ' +\n 'OpenStreetMap ' +\n 'contributors.';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {number} [cacheSize] Initial tile cache size. Will auto-grow to hold at least the number of tiles in the viewport.\n * @property {null|string} [crossOrigin='anonymous'] The `crossOrigin` attribute for loaded images. Note that\n * you must provide a `crossOrigin` value if you want to access pixel data with the Canvas renderer.\n * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling. By default,\n * linear interpolation is used when resampling. Set to false to use the nearest neighbor instead.\n * @property {number} [maxZoom=19] Max zoom.\n * @property {boolean} [opaque=true] Whether the layer is opaque.\n * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {import(\"../Tile.js\").LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL. The default is\n * ```js\n * function(imageTile, src) {\n * imageTile.getImage().src = src;\n * };\n * ```\n * @property {number} [transition=250] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n * @property {string} [url='https://tile.openstreetmap.org/{z}/{x}/{y}.png'] URL template.\n * Must include `{x}`, `{y}` or `{-y}`, and `{z}` placeholders.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0]\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n */\n\n/**\n * @classdesc\n * Layer source for the OpenStreetMap tile server.\n * @api\n */\nclass OSM extends XYZ {\n /**\n * @param {Options} [options] Open Street Map options.\n */\n constructor(options) {\n options = options || {};\n\n let attributions;\n if (options.attributions !== undefined) {\n attributions = options.attributions;\n } else {\n attributions = [ATTRIBUTION];\n }\n\n const crossOrigin =\n options.crossOrigin !== undefined ? options.crossOrigin : 'anonymous';\n\n const url =\n options.url !== undefined\n ? options.url\n : 'https://tile.openstreetmap.org/{z}/{x}/{y}.png';\n\n super({\n attributions: attributions,\n attributionsCollapsible: false,\n cacheSize: options.cacheSize,\n crossOrigin: crossOrigin,\n interpolate: options.interpolate,\n maxZoom: options.maxZoom !== undefined ? options.maxZoom : 19,\n opaque: options.opaque !== undefined ? options.opaque : true,\n reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n tileLoadFunction: options.tileLoadFunction,\n transition: options.transition,\n url: url,\n wrapX: options.wrapX,\n zDirection: options.zDirection,\n });\n }\n}\n\nexport default OSM;\n","/**\n * @module ol/layer/BaseImage\n */\nimport Layer from './Layer.js';\n\n/**\n * @template {import(\"../source/Image.js\").default} ImageSourceType\n * @typedef {Object} Options\n * @property {string} [className='ol-layer'] A CSS class name to set to the layer element.\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {import(\"../extent.js\").Extent} [extent] The bounding extent for layer rendering. The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex] The z-index for layer rendering. At rendering time, the layers\n * will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed\n * for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`\n * method was used.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {number} [minZoom] The minimum view zoom level (exclusive) above which this layer will be\n * visible.\n * @property {number} [maxZoom] The maximum view zoom level (inclusive) at which this layer will\n * be visible.\n * @property {import(\"../Map.js\").default} [map] Sets the layer as overlay on a map. The map will not manage\n * this layer in its layers collection, and the layer will be rendered on top. This is useful for\n * temporary layers. The standard way to add a layer to a map and have it managed by the map is to\n * use {@link import(\"../Map.js\").default#addLayer map.addLayer()}.\n * @property {ImageSourceType} [source] Source for this layer.\n * @property {Object} [properties] Arbitrary observable properties. Can be accessed with `#get()` and `#set()`.\n */\n\n/**\n * @classdesc\n * Server-rendered images that are available for arbitrary extents and\n * resolutions.\n * Note that any property set in the options is set as a {@link module:ol/Object~BaseObject}\n * property on the layer object; for example, setting `title: 'My Title'` in the\n * options means that `title` is observable, and has get/set accessors.\n *\n * @template {import(\"../source/Image.js\").default} ImageSourceType\n * @template {import(\"../renderer/Layer.js\").default} RendererType\n * @extends {Layer}\n * @api\n */\nclass BaseImageLayer extends Layer {\n /**\n * @param {Options} [options] Layer options.\n */\n constructor(options) {\n options = options ? options : {};\n super(options);\n }\n}\n\nexport default BaseImageLayer;\n","/**\n * @module ol/renderer/Layer\n */\nimport EventType from '../events/EventType.js';\nimport ImageState from '../ImageState.js';\nimport Observable from '../Observable.js';\nimport {abstract} from '../util.js';\n\n/**\n * @template {import(\"../layer/Layer.js\").default} LayerType\n */\nclass LayerRenderer extends Observable {\n /**\n * @param {LayerType} layer Layer.\n */\n constructor(layer) {\n super();\n\n /**\n * The renderer is initialized and ready to render.\n * @type {boolean}\n */\n this.ready = true;\n\n /** @private */\n this.boundHandleImageChange_ = this.handleImageChange_.bind(this);\n\n /**\n * @protected\n * @type {LayerType}\n */\n this.layer_ = layer;\n\n /**\n * @type {import(\"../render/canvas/ExecutorGroup\").default}\n */\n this.declutterExecutorGroup = null;\n }\n\n /**\n * Asynchronous layer level hit detection.\n * @param {import(\"../pixel.js\").Pixel} pixel Pixel.\n * @return {Promise>} Promise that resolves with\n * an array of features.\n */\n getFeatures(pixel) {\n return abstract();\n }\n\n /**\n * @param {import(\"../pixel.js\").Pixel} pixel Pixel.\n * @return {Uint8ClampedArray|Uint8Array|Float32Array|DataView|null} Pixel data.\n */\n getData(pixel) {\n return null;\n }\n\n /**\n * Determine whether render should be called.\n * @abstract\n * @param {import(\"../Map.js\").FrameState} frameState Frame state.\n * @return {boolean} Layer is ready to be rendered.\n */\n prepareFrame(frameState) {\n return abstract();\n }\n\n /**\n * Render the layer.\n * @abstract\n * @param {import(\"../Map.js\").FrameState} frameState Frame state.\n * @param {HTMLElement} target Target that may be used to render content to.\n * @return {HTMLElement} The rendered element.\n */\n renderFrame(frameState, target) {\n return abstract();\n }\n\n /**\n * @param {Object>} tiles Lookup of loaded tiles by zoom level.\n * @param {number} zoom Zoom level.\n * @param {import(\"../Tile.js\").default} tile Tile.\n * @return {boolean|void} If `false`, the tile will not be considered loaded.\n */\n loadedTileCallback(tiles, zoom, tile) {\n if (!tiles[zoom]) {\n tiles[zoom] = {};\n }\n tiles[zoom][tile.tileCoord.toString()] = tile;\n return undefined;\n }\n\n /**\n * Create a function that adds loaded tiles to the tile lookup.\n * @param {import(\"../source/Tile.js\").default} source Tile source.\n * @param {import(\"../proj/Projection.js\").default} projection Projection of the tiles.\n * @param {Object>} tiles Lookup of loaded tiles by zoom level.\n * @return {function(number, import(\"../TileRange.js\").default):boolean} A function that can be\n * called with a zoom level and a tile range to add loaded tiles to the lookup.\n * @protected\n */\n createLoadedTileFinder(source, projection, tiles) {\n return (\n /**\n * @param {number} zoom Zoom level.\n * @param {import(\"../TileRange.js\").default} tileRange Tile range.\n * @return {boolean} The tile range is fully loaded.\n */\n (zoom, tileRange) => {\n const callback = this.loadedTileCallback.bind(this, tiles, zoom);\n return source.forEachLoadedTile(projection, zoom, tileRange, callback);\n }\n );\n }\n /**\n * @abstract\n * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {import(\"../Map.js\").FrameState} frameState Frame state.\n * @param {number} hitTolerance Hit tolerance in pixels.\n * @param {import(\"./vector.js\").FeatureCallback} callback Feature callback.\n * @param {Array>} matches The hit detected matches with tolerance.\n * @return {T|undefined} Callback result.\n * @template T\n */\n forEachFeatureAtCoordinate(\n coordinate,\n frameState,\n hitTolerance,\n callback,\n matches\n ) {\n return undefined;\n }\n\n /**\n * @return {LayerType} Layer.\n */\n getLayer() {\n return this.layer_;\n }\n\n /**\n * Perform action necessary to get the layer rendered after new fonts have loaded\n * @abstract\n */\n handleFontsChanged() {}\n\n /**\n * Handle changes in image state.\n * @param {import(\"../events/Event.js\").default} event Image change event.\n * @private\n */\n handleImageChange_(event) {\n const image = /** @type {import(\"../Image.js\").default} */ (event.target);\n if (image.getState() === ImageState.LOADED) {\n this.renderIfReadyAndVisible();\n }\n }\n\n /**\n * Load the image if not already loaded, and register the image change\n * listener if needed.\n * @param {import(\"../ImageBase.js\").default} image Image.\n * @return {boolean} `true` if the image is already loaded, `false` otherwise.\n * @protected\n */\n loadImage(image) {\n let imageState = image.getState();\n if (imageState != ImageState.LOADED && imageState != ImageState.ERROR) {\n image.addEventListener(EventType.CHANGE, this.boundHandleImageChange_);\n }\n if (imageState == ImageState.IDLE) {\n image.load();\n imageState = image.getState();\n }\n return imageState == ImageState.LOADED;\n }\n\n /**\n * @protected\n */\n renderIfReadyAndVisible() {\n const layer = this.getLayer();\n if (layer && layer.getVisible() && layer.getSourceState() === 'ready') {\n layer.changed();\n }\n }\n\n /**\n * Clean up.\n */\n disposeInternal() {\n delete this.layer_;\n super.disposeInternal();\n }\n}\n\nexport default LayerRenderer;\n","/**\n * @module ol/renderer/canvas/Layer\n */\nimport LayerRenderer from '../Layer.js';\nimport RenderEvent from '../../render/Event.js';\nimport RenderEventType from '../../render/EventType.js';\nimport {\n apply as applyTransform,\n compose as composeTransform,\n create as createTransform,\n} from '../../transform.js';\nimport {asArray} from '../../color.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {equals} from '../../array.js';\nimport {\n getBottomLeft,\n getBottomRight,\n getTopLeft,\n getTopRight,\n} from '../../extent.js';\n\n/**\n * @type {Array}\n */\nexport const canvasPool = [];\n\n/**\n * @type {CanvasRenderingContext2D}\n */\nlet pixelContext = null;\n\nfunction createPixelContext() {\n pixelContext = createCanvasContext2D(1, 1, undefined, {\n willReadFrequently: true,\n });\n}\n\n/**\n * @abstract\n * @template {import(\"../../layer/Layer.js\").default} LayerType\n * @extends {LayerRenderer}\n */\nclass CanvasLayerRenderer extends LayerRenderer {\n /**\n * @param {LayerType} layer Layer.\n */\n constructor(layer) {\n super(layer);\n\n /**\n * @protected\n * @type {HTMLElement}\n */\n this.container = null;\n\n /**\n * @protected\n * @type {number}\n */\n this.renderedResolution;\n\n /**\n * A temporary transform. The values in this transform should only be used in a\n * function that sets the values.\n * @protected\n * @type {import(\"../../transform.js\").Transform}\n */\n this.tempTransform = createTransform();\n\n /**\n * The transform for rendered pixels to viewport CSS pixels. This transform must\n * be set when rendering a frame and may be used by other functions after rendering.\n * @protected\n * @type {import(\"../../transform.js\").Transform}\n */\n this.pixelTransform = createTransform();\n\n /**\n * The transform for viewport CSS pixels to rendered pixels. This transform must\n * be set when rendering a frame and may be used by other functions after rendering.\n * @protected\n * @type {import(\"../../transform.js\").Transform}\n */\n this.inversePixelTransform = createTransform();\n\n /**\n * @type {CanvasRenderingContext2D}\n */\n this.context = null;\n\n /**\n * @type {boolean}\n */\n this.containerReused = false;\n\n /**\n * @private\n * @type {CanvasRenderingContext2D}\n */\n this.pixelContext_ = null;\n\n /**\n * @protected\n * @type {import(\"../../Map.js\").FrameState|null}\n */\n this.frameState = null;\n }\n\n /**\n * @param {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} image Image.\n * @param {number} col The column index.\n * @param {number} row The row index.\n * @return {Uint8ClampedArray|null} The image data.\n */\n getImageData(image, col, row) {\n if (!pixelContext) {\n createPixelContext();\n }\n pixelContext.clearRect(0, 0, 1, 1);\n\n let data;\n try {\n pixelContext.drawImage(image, col, row, 1, 1, 0, 0, 1, 1);\n data = pixelContext.getImageData(0, 0, 1, 1).data;\n } catch (err) {\n pixelContext = null;\n return null;\n }\n return data;\n }\n\n /**\n * @param {import('../../Map.js').FrameState} frameState Frame state.\n * @return {string} Background color.\n */\n getBackground(frameState) {\n const layer = this.getLayer();\n let background = layer.getBackground();\n if (typeof background === 'function') {\n background = background(frameState.viewState.resolution);\n }\n return background || undefined;\n }\n\n /**\n * Get a rendering container from an existing target, if compatible.\n * @param {HTMLElement} target Potential render target.\n * @param {string} transform CSS Transform.\n * @param {string} [backgroundColor] Background color.\n */\n useContainer(target, transform, backgroundColor) {\n const layerClassName = this.getLayer().getClassName();\n let container, context;\n if (\n target &&\n target.className === layerClassName &&\n (!backgroundColor ||\n (target &&\n target.style.backgroundColor &&\n equals(\n asArray(target.style.backgroundColor),\n asArray(backgroundColor)\n )))\n ) {\n const canvas = target.firstElementChild;\n if (canvas instanceof HTMLCanvasElement) {\n context = canvas.getContext('2d');\n }\n }\n if (context && context.canvas.style.transform === transform) {\n // Container of the previous layer renderer can be used.\n this.container = target;\n this.context = context;\n this.containerReused = true;\n } else if (this.containerReused) {\n // Previously reused container cannot be used any more.\n this.container = null;\n this.context = null;\n this.containerReused = false;\n }\n if (!this.container) {\n container = document.createElement('div');\n container.className = layerClassName;\n let style = container.style;\n style.position = 'absolute';\n style.width = '100%';\n style.height = '100%';\n context = createCanvasContext2D();\n const canvas = context.canvas;\n container.appendChild(canvas);\n style = canvas.style;\n style.position = 'absolute';\n style.left = '0';\n style.transformOrigin = 'top left';\n this.container = container;\n this.context = context;\n }\n if (\n !this.containerReused &&\n backgroundColor &&\n !this.container.style.backgroundColor\n ) {\n this.container.style.backgroundColor = backgroundColor;\n }\n }\n\n /**\n * @param {CanvasRenderingContext2D} context Context.\n * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n * @param {import(\"../../extent.js\").Extent} extent Clip extent.\n * @protected\n */\n clipUnrotated(context, frameState, extent) {\n const topLeft = getTopLeft(extent);\n const topRight = getTopRight(extent);\n const bottomRight = getBottomRight(extent);\n const bottomLeft = getBottomLeft(extent);\n\n applyTransform(frameState.coordinateToPixelTransform, topLeft);\n applyTransform(frameState.coordinateToPixelTransform, topRight);\n applyTransform(frameState.coordinateToPixelTransform, bottomRight);\n applyTransform(frameState.coordinateToPixelTransform, bottomLeft);\n\n const inverted = this.inversePixelTransform;\n applyTransform(inverted, topLeft);\n applyTransform(inverted, topRight);\n applyTransform(inverted, bottomRight);\n applyTransform(inverted, bottomLeft);\n\n context.save();\n context.beginPath();\n context.moveTo(Math.round(topLeft[0]), Math.round(topLeft[1]));\n context.lineTo(Math.round(topRight[0]), Math.round(topRight[1]));\n context.lineTo(Math.round(bottomRight[0]), Math.round(bottomRight[1]));\n context.lineTo(Math.round(bottomLeft[0]), Math.round(bottomLeft[1]));\n context.clip();\n }\n\n /**\n * @param {import(\"../../render/EventType.js\").default} type Event type.\n * @param {CanvasRenderingContext2D} context Context.\n * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n * @private\n */\n dispatchRenderEvent_(type, context, frameState) {\n const layer = this.getLayer();\n if (layer.hasListener(type)) {\n const event = new RenderEvent(\n type,\n this.inversePixelTransform,\n frameState,\n context\n );\n layer.dispatchEvent(event);\n }\n }\n\n /**\n * @param {CanvasRenderingContext2D} context Context.\n * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n * @protected\n */\n preRender(context, frameState) {\n this.frameState = frameState;\n this.dispatchRenderEvent_(RenderEventType.PRERENDER, context, frameState);\n }\n\n /**\n * @param {CanvasRenderingContext2D} context Context.\n * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n * @protected\n */\n postRender(context, frameState) {\n this.dispatchRenderEvent_(RenderEventType.POSTRENDER, context, frameState);\n }\n\n /**\n * Creates a transform for rendering to an element that will be rotated after rendering.\n * @param {import(\"../../coordinate.js\").Coordinate} center Center.\n * @param {number} resolution Resolution.\n * @param {number} rotation Rotation.\n * @param {number} pixelRatio Pixel ratio.\n * @param {number} width Width of the rendered element (in pixels).\n * @param {number} height Height of the rendered element (in pixels).\n * @param {number} offsetX Offset on the x-axis in view coordinates.\n * @protected\n * @return {!import(\"../../transform.js\").Transform} Transform.\n */\n getRenderTransform(\n center,\n resolution,\n rotation,\n pixelRatio,\n width,\n height,\n offsetX\n ) {\n const dx1 = width / 2;\n const dy1 = height / 2;\n const sx = pixelRatio / resolution;\n const sy = -sx;\n const dx2 = -center[0] + offsetX;\n const dy2 = -center[1];\n return composeTransform(\n this.tempTransform,\n dx1,\n dy1,\n sx,\n sy,\n -rotation,\n dx2,\n dy2\n );\n }\n\n /**\n * Clean up.\n */\n disposeInternal() {\n delete this.frameState;\n super.disposeInternal();\n }\n}\n\nexport default CanvasLayerRenderer;\n","/**\n * @module ol/renderer/canvas/ImageLayer\n */\nimport CanvasLayerRenderer from './Layer.js';\nimport ImageState from '../../ImageState.js';\nimport ViewHint from '../../ViewHint.js';\nimport {\n apply as applyTransform,\n compose as composeTransform,\n makeInverse,\n toString as toTransformString,\n} from '../../transform.js';\nimport {\n containsCoordinate,\n containsExtent,\n getHeight,\n getIntersection,\n getWidth,\n intersects as intersectsExtent,\n isEmpty,\n} from '../../extent.js';\nimport {fromUserExtent} from '../../proj.js';\n\n/**\n * @classdesc\n * Canvas renderer for image layers.\n * @api\n */\nclass CanvasImageLayerRenderer extends CanvasLayerRenderer {\n /**\n * @param {import(\"../../layer/Image.js\").default} imageLayer Image layer.\n */\n constructor(imageLayer) {\n super(imageLayer);\n\n /**\n * @protected\n * @type {?import(\"../../ImageBase.js\").default}\n */\n this.image_ = null;\n }\n\n /**\n * @return {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} Image.\n */\n getImage() {\n return !this.image_ ? null : this.image_.getImage();\n }\n\n /**\n * Determine whether render should be called.\n * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n * @return {boolean} Layer is ready to be rendered.\n */\n prepareFrame(frameState) {\n const layerState = frameState.layerStatesArray[frameState.layerIndex];\n const pixelRatio = frameState.pixelRatio;\n const viewState = frameState.viewState;\n const viewResolution = viewState.resolution;\n\n const imageSource = this.getLayer().getSource();\n\n const hints = frameState.viewHints;\n\n let renderedExtent = frameState.extent;\n if (layerState.extent !== undefined) {\n renderedExtent = getIntersection(\n renderedExtent,\n fromUserExtent(layerState.extent, viewState.projection)\n );\n }\n\n if (\n !hints[ViewHint.ANIMATING] &&\n !hints[ViewHint.INTERACTING] &&\n !isEmpty(renderedExtent)\n ) {\n if (imageSource) {\n const projection = viewState.projection;\n const image = imageSource.getImage(\n renderedExtent,\n viewResolution,\n pixelRatio,\n projection\n );\n if (image) {\n if (this.loadImage(image)) {\n this.image_ = image;\n } else if (image.getState() === ImageState.EMPTY) {\n this.image_ = null;\n }\n }\n } else {\n this.image_ = null;\n }\n }\n\n return !!this.image_;\n }\n\n /**\n * @param {import(\"../../pixel.js\").Pixel} pixel Pixel.\n * @return {Uint8ClampedArray} Data at the pixel location.\n */\n getData(pixel) {\n const frameState = this.frameState;\n if (!frameState) {\n return null;\n }\n\n const layer = this.getLayer();\n const coordinate = applyTransform(\n frameState.pixelToCoordinateTransform,\n pixel.slice()\n );\n\n const layerExtent = layer.getExtent();\n if (layerExtent) {\n if (!containsCoordinate(layerExtent, coordinate)) {\n return null;\n }\n }\n\n const imageExtent = this.image_.getExtent();\n const img = this.image_.getImage();\n\n const imageMapWidth = getWidth(imageExtent);\n const col = Math.floor(\n img.width * ((coordinate[0] - imageExtent[0]) / imageMapWidth)\n );\n if (col < 0 || col >= img.width) {\n return null;\n }\n\n const imageMapHeight = getHeight(imageExtent);\n const row = Math.floor(\n img.height * ((imageExtent[3] - coordinate[1]) / imageMapHeight)\n );\n if (row < 0 || row >= img.height) {\n return null;\n }\n\n return this.getImageData(img, col, row);\n }\n\n /**\n * Render the layer.\n * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n * @param {HTMLElement} target Target that may be used to render content to.\n * @return {HTMLElement} The rendered element.\n */\n renderFrame(frameState, target) {\n const image = this.image_;\n const imageExtent = image.getExtent();\n const imageResolution = image.getResolution();\n const imagePixelRatio = image.getPixelRatio();\n const layerState = frameState.layerStatesArray[frameState.layerIndex];\n const pixelRatio = frameState.pixelRatio;\n const viewState = frameState.viewState;\n const viewCenter = viewState.center;\n const viewResolution = viewState.resolution;\n const scale =\n (pixelRatio * imageResolution) / (viewResolution * imagePixelRatio);\n\n const extent = frameState.extent;\n const resolution = viewState.resolution;\n const rotation = viewState.rotation;\n // desired dimensions of the canvas in pixels\n const width = Math.round((getWidth(extent) / resolution) * pixelRatio);\n const height = Math.round((getHeight(extent) / resolution) * pixelRatio);\n\n // set forward and inverse pixel transforms\n composeTransform(\n this.pixelTransform,\n frameState.size[0] / 2,\n frameState.size[1] / 2,\n 1 / pixelRatio,\n 1 / pixelRatio,\n rotation,\n -width / 2,\n -height / 2\n );\n makeInverse(this.inversePixelTransform, this.pixelTransform);\n\n const canvasTransform = toTransformString(this.pixelTransform);\n\n this.useContainer(target, canvasTransform, this.getBackground(frameState));\n\n const context = this.context;\n const canvas = context.canvas;\n\n if (canvas.width != width || canvas.height != height) {\n canvas.width = width;\n canvas.height = height;\n } else if (!this.containerReused) {\n context.clearRect(0, 0, width, height);\n }\n\n // clipped rendering if layer extent is set\n let clipped = false;\n let render = true;\n if (layerState.extent) {\n const layerExtent = fromUserExtent(\n layerState.extent,\n viewState.projection\n );\n render = intersectsExtent(layerExtent, frameState.extent);\n clipped = render && !containsExtent(layerExtent, frameState.extent);\n if (clipped) {\n this.clipUnrotated(context, frameState, layerExtent);\n }\n }\n\n const img = image.getImage();\n\n const transform = composeTransform(\n this.tempTransform,\n width / 2,\n height / 2,\n scale,\n scale,\n 0,\n (imagePixelRatio * (imageExtent[0] - viewCenter[0])) / imageResolution,\n (imagePixelRatio * (viewCenter[1] - imageExtent[3])) / imageResolution\n );\n\n this.renderedResolution = (imageResolution * pixelRatio) / imagePixelRatio;\n\n const dw = img.width * transform[0];\n const dh = img.height * transform[3];\n\n if (!this.getLayer().getSource().getInterpolate()) {\n context.imageSmoothingEnabled = false;\n }\n\n this.preRender(context, frameState);\n if (render && dw >= 0.5 && dh >= 0.5) {\n const dx = transform[4];\n const dy = transform[5];\n const opacity = layerState.opacity;\n let previousAlpha;\n if (opacity !== 1) {\n previousAlpha = context.globalAlpha;\n context.globalAlpha = opacity;\n }\n context.drawImage(img, 0, 0, +img.width, +img.height, dx, dy, dw, dh);\n if (opacity !== 1) {\n context.globalAlpha = previousAlpha;\n }\n }\n this.postRender(context, frameState);\n\n if (clipped) {\n context.restore();\n }\n context.imageSmoothingEnabled = true;\n\n if (canvasTransform !== canvas.style.transform) {\n canvas.style.transform = canvasTransform;\n }\n\n return this.container;\n }\n}\n\nexport default CanvasImageLayerRenderer;\n","/**\n * @module ol/layer/Image\n */\nimport BaseImageLayer from './BaseImage.js';\nimport CanvasImageLayerRenderer from '../renderer/canvas/ImageLayer.js';\n\n/**\n * @classdesc\n * Server-rendered images that are available for arbitrary extents and\n * resolutions.\n * Note that any property set in the options is set as a {@link module:ol/Object~BaseObject}\n * property on the layer object; for example, setting `title: 'My Title'` in the\n * options means that `title` is observable, and has get/set accessors.\n *\n * @template {import(\"../source/Image.js\").default} ImageSourceType\n * @extends {BaseImageLayer}\n * @api\n */\nclass ImageLayer extends BaseImageLayer {\n /**\n * @param {import(\"./BaseImage.js\").Options} [options] Layer options.\n */\n constructor(options) {\n super(options);\n }\n\n createRenderer() {\n return new CanvasImageLayerRenderer(this);\n }\n\n /**\n * Get data for a pixel location. A four element RGBA array will be returned. For requests outside the\n * layer extent, `null` will be returned. Data for an image can only be retrieved if the\n * source's `crossOrigin` property is set.\n *\n * ```js\n * // display layer data on every pointer move\n * map.on('pointermove', (event) => {\n * console.log(layer.getData(event.pixel));\n * });\n * ```\n * @param {import(\"../pixel\").Pixel} pixel Pixel.\n * @return {Uint8ClampedArray|Uint8Array|Float32Array|DataView|null} Pixel data.\n * @api\n */\n getData(pixel) {\n return super.getData(pixel);\n }\n}\n\nexport default ImageLayer;\n","/**\n * @module ol/layer/TileProperty\n */\n\n/**\n * @enum {string}\n */\nexport default {\n PRELOAD: 'preload',\n USE_INTERIM_TILES_ON_ERROR: 'useInterimTilesOnError',\n};\n","/**\n * @module ol/layer/BaseTile\n */\nimport Layer from './Layer.js';\nimport TileProperty from './TileProperty.js';\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature &\n * import(\"../Observable\").OnSignature &\n * import(\"../Observable\").OnSignature &\n * import(\"../Observable\").CombinedOnSignature} BaseTileLayerOnSignature\n */\n\n/**\n * @template {import(\"../source/Tile.js\").default} TileSourceType\n * @typedef {Object} Options\n * @property {string} [className='ol-layer'] A CSS class name to set to the layer element.\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {import(\"../extent.js\").Extent} [extent] The bounding extent for layer rendering. The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex] The z-index for layer rendering. At rendering time, the layers\n * will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed\n * for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`\n * method was used.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {number} [minZoom] The minimum view zoom level (exclusive) above which this layer will be\n * visible.\n * @property {number} [maxZoom] The maximum view zoom level (inclusive) at which this layer will\n * be visible.\n * @property {number} [preload=0] Preload. Load low-resolution tiles up to `preload` levels. `0`\n * means no preloading.\n * @property {TileSourceType} [source] Source for this layer.\n * @property {import(\"../Map.js\").default} [map] Sets the layer as overlay on a map. The map will not manage\n * this layer in its layers collection, and the layer will be rendered on top. This is useful for\n * temporary layers. The standard way to add a layer to a map and have it managed by the map is to\n * use {@link import(\"../Map.js\").default#addLayer map.addLayer()}.\n * @property {boolean} [useInterimTilesOnError=true] Use interim tiles on error.\n * @property {Object} [properties] Arbitrary observable properties. Can be accessed with `#get()` and `#set()`.\n */\n\n/**\n * @classdesc\n * For layer sources that provide pre-rendered, tiled images in grids that are\n * organized by zoom levels for specific resolutions.\n * Note that any property set in the options is set as a {@link module:ol/Object~BaseObject}\n * property on the layer object; for example, setting `title: 'My Title'` in the\n * options means that `title` is observable, and has get/set accessors.\n *\n * @template {import(\"../source/Tile.js\").default} TileSourceType\n * @template {import(\"../renderer/Layer.js\").default} RendererType\n * @extends {Layer}\n * @api\n */\nclass BaseTileLayer extends Layer {\n /**\n * @param {Options} [options] Tile layer options.\n */\n constructor(options) {\n options = options ? options : {};\n\n const baseOptions = Object.assign({}, options);\n\n delete baseOptions.preload;\n delete baseOptions.useInterimTilesOnError;\n super(baseOptions);\n\n /***\n * @type {BaseTileLayerOnSignature}\n */\n this.on;\n\n /***\n * @type {BaseTileLayerOnSignature}\n */\n this.once;\n\n /***\n * @type {BaseTileLayerOnSignature}\n */\n this.un;\n\n this.setPreload(options.preload !== undefined ? options.preload : 0);\n this.setUseInterimTilesOnError(\n options.useInterimTilesOnError !== undefined\n ? options.useInterimTilesOnError\n : true\n );\n }\n\n /**\n * Return the level as number to which we will preload tiles up to.\n * @return {number} The level to preload tiles up to.\n * @observable\n * @api\n */\n getPreload() {\n return /** @type {number} */ (this.get(TileProperty.PRELOAD));\n }\n\n /**\n * Set the level as number to which we will preload tiles up to.\n * @param {number} preload The level to preload tiles up to.\n * @observable\n * @api\n */\n setPreload(preload) {\n this.set(TileProperty.PRELOAD, preload);\n }\n\n /**\n * Whether we use interim tiles on error.\n * @return {boolean} Use interim tiles on error.\n * @observable\n * @api\n */\n getUseInterimTilesOnError() {\n return /** @type {boolean} */ (\n this.get(TileProperty.USE_INTERIM_TILES_ON_ERROR)\n );\n }\n\n /**\n * Set whether we use interim tiles on error.\n * @param {boolean} useInterimTilesOnError Use interim tiles on error.\n * @observable\n * @api\n */\n setUseInterimTilesOnError(useInterimTilesOnError) {\n this.set(TileProperty.USE_INTERIM_TILES_ON_ERROR, useInterimTilesOnError);\n }\n\n /**\n * Get data for a pixel location. The return type depends on the source data. For image tiles,\n * a four element RGBA array will be returned. For data tiles, the array length will match the\n * number of bands in the dataset. For requests outside the layer extent, `null` will be returned.\n * Data for a image tiles can only be retrieved if the source's `crossOrigin` property is set.\n *\n * ```js\n * // display layer data on every pointer move\n * map.on('pointermove', (event) => {\n * console.log(layer.getData(event.pixel));\n * });\n * ```\n * @param {import(\"../pixel\").Pixel} pixel Pixel.\n * @return {Uint8ClampedArray|Uint8Array|Float32Array|DataView|null} Pixel data.\n * @api\n */\n getData(pixel) {\n return super.getData(pixel);\n }\n}\n\nexport default BaseTileLayer;\n","/**\n * @module ol/renderer/canvas/TileLayer\n */\nimport CanvasLayerRenderer from './Layer.js';\nimport ImageTile from '../../ImageTile.js';\nimport ReprojTile from '../../reproj/Tile.js';\nimport TileRange from '../../TileRange.js';\nimport TileState from '../../TileState.js';\nimport {\n apply as applyTransform,\n compose as composeTransform,\n makeInverse,\n toString as toTransformString,\n} from '../../transform.js';\nimport {ascending} from '../../array.js';\nimport {\n containsCoordinate,\n createEmpty,\n equals,\n getHeight,\n getIntersection,\n getRotatedViewport,\n getTopLeft,\n getWidth,\n intersects,\n} from '../../extent.js';\nimport {fromUserExtent} from '../../proj.js';\nimport {getUid} from '../../util.js';\nimport {toSize} from '../../size.js';\n\n/**\n * @classdesc\n * Canvas renderer for tile layers.\n * @api\n * @template {import(\"../../layer/Tile.js\").default|import(\"../../layer/VectorTile.js\").default} [LayerType=import(\"../../layer/Tile.js\").default|import(\"../../layer/VectorTile.js\").default]\n * @extends {CanvasLayerRenderer}\n */\nclass CanvasTileLayerRenderer extends CanvasLayerRenderer {\n /**\n * @param {LayerType} tileLayer Tile layer.\n */\n constructor(tileLayer) {\n super(tileLayer);\n\n /**\n * Rendered extent has changed since the previous `renderFrame()` call\n * @type {boolean}\n */\n this.extentChanged = true;\n\n /**\n * @private\n * @type {?import(\"../../extent.js\").Extent}\n */\n this.renderedExtent_ = null;\n\n /**\n * @protected\n * @type {number}\n */\n this.renderedPixelRatio;\n\n /**\n * @protected\n * @type {import(\"../../proj/Projection.js\").default}\n */\n this.renderedProjection = null;\n\n /**\n * @protected\n * @type {number}\n */\n this.renderedRevision;\n\n /**\n * @protected\n * @type {!Array}\n */\n this.renderedTiles = [];\n\n /**\n * @private\n * @type {boolean}\n */\n this.newTiles_ = false;\n\n /**\n * @protected\n * @type {import(\"../../extent.js\").Extent}\n */\n this.tmpExtent = createEmpty();\n\n /**\n * @private\n * @type {import(\"../../TileRange.js\").default}\n */\n this.tmpTileRange_ = new TileRange(0, 0, 0, 0);\n }\n\n /**\n * @protected\n * @param {import(\"../../Tile.js\").default} tile Tile.\n * @return {boolean} Tile is drawable.\n */\n isDrawableTile(tile) {\n const tileLayer = this.getLayer();\n const tileState = tile.getState();\n const useInterimTilesOnError = tileLayer.getUseInterimTilesOnError();\n return (\n tileState == TileState.LOADED ||\n tileState == TileState.EMPTY ||\n (tileState == TileState.ERROR && !useInterimTilesOnError)\n );\n }\n\n /**\n * @param {number} z Tile coordinate z.\n * @param {number} x Tile coordinate x.\n * @param {number} y Tile coordinate y.\n * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n * @return {!import(\"../../Tile.js\").default} Tile.\n */\n getTile(z, x, y, frameState) {\n const pixelRatio = frameState.pixelRatio;\n const projection = frameState.viewState.projection;\n const tileLayer = this.getLayer();\n const tileSource = tileLayer.getSource();\n let tile = tileSource.getTile(z, x, y, pixelRatio, projection);\n if (tile.getState() == TileState.ERROR) {\n if (tileLayer.getUseInterimTilesOnError() && tileLayer.getPreload() > 0) {\n // Preloaded tiles for lower resolutions might have finished loading.\n this.newTiles_ = true;\n }\n }\n if (!this.isDrawableTile(tile)) {\n tile = tile.getInterimTile();\n }\n return tile;\n }\n\n /**\n * @param {import(\"../../pixel.js\").Pixel} pixel Pixel.\n * @return {Uint8ClampedArray} Data at the pixel location.\n */\n getData(pixel) {\n const frameState = this.frameState;\n if (!frameState) {\n return null;\n }\n\n const layer = this.getLayer();\n const coordinate = applyTransform(\n frameState.pixelToCoordinateTransform,\n pixel.slice()\n );\n\n const layerExtent = layer.getExtent();\n if (layerExtent) {\n if (!containsCoordinate(layerExtent, coordinate)) {\n return null;\n }\n }\n\n const pixelRatio = frameState.pixelRatio;\n const projection = frameState.viewState.projection;\n const viewState = frameState.viewState;\n const source = layer.getRenderSource();\n const tileGrid = source.getTileGridForProjection(viewState.projection);\n const tilePixelRatio = source.getTilePixelRatio(frameState.pixelRatio);\n\n for (\n let z = tileGrid.getZForResolution(viewState.resolution);\n z >= tileGrid.getMinZoom();\n --z\n ) {\n const tileCoord = tileGrid.getTileCoordForCoordAndZ(coordinate, z);\n const tile = source.getTile(\n z,\n tileCoord[1],\n tileCoord[2],\n pixelRatio,\n projection\n );\n if (\n !(tile instanceof ImageTile || tile instanceof ReprojTile) ||\n (tile instanceof ReprojTile && tile.getState() === TileState.EMPTY)\n ) {\n return null;\n }\n\n if (tile.getState() !== TileState.LOADED) {\n continue;\n }\n\n const tileOrigin = tileGrid.getOrigin(z);\n const tileSize = toSize(tileGrid.getTileSize(z));\n const tileResolution = tileGrid.getResolution(z);\n\n const col = Math.floor(\n tilePixelRatio *\n ((coordinate[0] - tileOrigin[0]) / tileResolution -\n tileCoord[1] * tileSize[0])\n );\n\n const row = Math.floor(\n tilePixelRatio *\n ((tileOrigin[1] - coordinate[1]) / tileResolution -\n tileCoord[2] * tileSize[1])\n );\n\n const gutter = Math.round(\n tilePixelRatio * source.getGutterForProjection(viewState.projection)\n );\n\n return this.getImageData(tile.getImage(), col + gutter, row + gutter);\n }\n\n return null;\n }\n\n /**\n * @param {Object>} tiles Lookup of loaded tiles by zoom level.\n * @param {number} zoom Zoom level.\n * @param {import(\"../../Tile.js\").default} tile Tile.\n * @return {boolean|void} If `false`, the tile will not be considered loaded.\n */\n loadedTileCallback(tiles, zoom, tile) {\n if (this.isDrawableTile(tile)) {\n return super.loadedTileCallback(tiles, zoom, tile);\n }\n return false;\n }\n\n /**\n * Determine whether render should be called.\n * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n * @return {boolean} Layer is ready to be rendered.\n */\n prepareFrame(frameState) {\n return !!this.getLayer().getSource();\n }\n\n /**\n * Render the layer.\n * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n * @param {HTMLElement} target Target that may be used to render content to.\n * @return {HTMLElement} The rendered element.\n */\n renderFrame(frameState, target) {\n const layerState = frameState.layerStatesArray[frameState.layerIndex];\n const viewState = frameState.viewState;\n const projection = viewState.projection;\n const viewResolution = viewState.resolution;\n const viewCenter = viewState.center;\n const rotation = viewState.rotation;\n const pixelRatio = frameState.pixelRatio;\n\n const tileLayer = this.getLayer();\n const tileSource = tileLayer.getSource();\n const sourceRevision = tileSource.getRevision();\n const tileGrid = tileSource.getTileGridForProjection(projection);\n const z = tileGrid.getZForResolution(viewResolution, tileSource.zDirection);\n const tileResolution = tileGrid.getResolution(z);\n\n let extent = frameState.extent;\n const resolution = frameState.viewState.resolution;\n const tilePixelRatio = tileSource.getTilePixelRatio(pixelRatio);\n // desired dimensions of the canvas in pixels\n const width = Math.round((getWidth(extent) / resolution) * pixelRatio);\n const height = Math.round((getHeight(extent) / resolution) * pixelRatio);\n\n const layerExtent =\n layerState.extent && fromUserExtent(layerState.extent, projection);\n if (layerExtent) {\n extent = getIntersection(\n extent,\n fromUserExtent(layerState.extent, projection)\n );\n }\n\n const dx = (tileResolution * width) / 2 / tilePixelRatio;\n const dy = (tileResolution * height) / 2 / tilePixelRatio;\n const canvasExtent = [\n viewCenter[0] - dx,\n viewCenter[1] - dy,\n viewCenter[0] + dx,\n viewCenter[1] + dy,\n ];\n\n const tileRange = tileGrid.getTileRangeForExtentAndZ(extent, z);\n\n /**\n * @type {Object>}\n */\n const tilesToDrawByZ = {};\n tilesToDrawByZ[z] = {};\n\n const findLoadedTiles = this.createLoadedTileFinder(\n tileSource,\n projection,\n tilesToDrawByZ\n );\n\n const tmpExtent = this.tmpExtent;\n const tmpTileRange = this.tmpTileRange_;\n this.newTiles_ = false;\n const viewport = rotation\n ? getRotatedViewport(\n viewState.center,\n resolution,\n rotation,\n frameState.size\n )\n : undefined;\n for (let x = tileRange.minX; x <= tileRange.maxX; ++x) {\n for (let y = tileRange.minY; y <= tileRange.maxY; ++y) {\n if (\n rotation &&\n !tileGrid.tileCoordIntersectsViewport([z, x, y], viewport)\n ) {\n continue;\n }\n const tile = this.getTile(z, x, y, frameState);\n if (this.isDrawableTile(tile)) {\n const uid = getUid(this);\n if (tile.getState() == TileState.LOADED) {\n tilesToDrawByZ[z][tile.tileCoord.toString()] = tile;\n let inTransition = tile.inTransition(uid);\n if (inTransition && layerState.opacity !== 1) {\n // Skipping transition when layer is not fully opaque avoids visual artifacts.\n tile.endTransition(uid);\n inTransition = false;\n }\n if (\n !this.newTiles_ &&\n (inTransition || !this.renderedTiles.includes(tile))\n ) {\n this.newTiles_ = true;\n }\n }\n if (tile.getAlpha(uid, frameState.time) === 1) {\n // don't look for alt tiles if alpha is 1\n continue;\n }\n }\n\n const childTileRange = tileGrid.getTileCoordChildTileRange(\n tile.tileCoord,\n tmpTileRange,\n tmpExtent\n );\n\n let covered = false;\n if (childTileRange) {\n covered = findLoadedTiles(z + 1, childTileRange);\n }\n if (!covered) {\n tileGrid.forEachTileCoordParentTileRange(\n tile.tileCoord,\n findLoadedTiles,\n tmpTileRange,\n tmpExtent\n );\n }\n }\n }\n\n const canvasScale =\n ((tileResolution / viewResolution) * pixelRatio) / tilePixelRatio;\n\n // set forward and inverse pixel transforms\n composeTransform(\n this.pixelTransform,\n frameState.size[0] / 2,\n frameState.size[1] / 2,\n 1 / pixelRatio,\n 1 / pixelRatio,\n rotation,\n -width / 2,\n -height / 2\n );\n\n const canvasTransform = toTransformString(this.pixelTransform);\n\n this.useContainer(target, canvasTransform, this.getBackground(frameState));\n const context = this.context;\n const canvas = context.canvas;\n\n makeInverse(this.inversePixelTransform, this.pixelTransform);\n\n // set scale transform for calculating tile positions on the canvas\n composeTransform(\n this.tempTransform,\n width / 2,\n height / 2,\n canvasScale,\n canvasScale,\n 0,\n -width / 2,\n -height / 2\n );\n\n if (canvas.width != width || canvas.height != height) {\n canvas.width = width;\n canvas.height = height;\n } else if (!this.containerReused) {\n context.clearRect(0, 0, width, height);\n }\n\n if (layerExtent) {\n this.clipUnrotated(context, frameState, layerExtent);\n }\n\n if (!tileSource.getInterpolate()) {\n context.imageSmoothingEnabled = false;\n }\n\n this.preRender(context, frameState);\n\n this.renderedTiles.length = 0;\n /** @type {Array} */\n let zs = Object.keys(tilesToDrawByZ).map(Number);\n zs.sort(ascending);\n\n let clips, clipZs, currentClip;\n if (\n layerState.opacity === 1 &&\n (!this.containerReused ||\n tileSource.getOpaque(frameState.viewState.projection))\n ) {\n zs = zs.reverse();\n } else {\n clips = [];\n clipZs = [];\n }\n for (let i = zs.length - 1; i >= 0; --i) {\n const currentZ = zs[i];\n const currentTilePixelSize = tileSource.getTilePixelSize(\n currentZ,\n pixelRatio,\n projection\n );\n const currentResolution = tileGrid.getResolution(currentZ);\n const currentScale = currentResolution / tileResolution;\n const dx = currentTilePixelSize[0] * currentScale * canvasScale;\n const dy = currentTilePixelSize[1] * currentScale * canvasScale;\n const originTileCoord = tileGrid.getTileCoordForCoordAndZ(\n getTopLeft(canvasExtent),\n currentZ\n );\n const originTileExtent = tileGrid.getTileCoordExtent(originTileCoord);\n const origin = applyTransform(this.tempTransform, [\n (tilePixelRatio * (originTileExtent[0] - canvasExtent[0])) /\n tileResolution,\n (tilePixelRatio * (canvasExtent[3] - originTileExtent[3])) /\n tileResolution,\n ]);\n const tileGutter =\n tilePixelRatio * tileSource.getGutterForProjection(projection);\n const tilesToDraw = tilesToDrawByZ[currentZ];\n for (const tileCoordKey in tilesToDraw) {\n const tile = /** @type {import(\"../../ImageTile.js\").default} */ (\n tilesToDraw[tileCoordKey]\n );\n const tileCoord = tile.tileCoord;\n\n // Calculate integer positions and sizes so that tiles align\n const xIndex = originTileCoord[1] - tileCoord[1];\n const nextX = Math.round(origin[0] - (xIndex - 1) * dx);\n const yIndex = originTileCoord[2] - tileCoord[2];\n const nextY = Math.round(origin[1] - (yIndex - 1) * dy);\n const x = Math.round(origin[0] - xIndex * dx);\n const y = Math.round(origin[1] - yIndex * dy);\n const w = nextX - x;\n const h = nextY - y;\n const transition = z === currentZ;\n\n const inTransition =\n transition && tile.getAlpha(getUid(this), frameState.time) !== 1;\n let contextSaved = false;\n if (!inTransition) {\n if (clips) {\n // Clip mask for regions in this tile that already filled by a higher z tile\n currentClip = [x, y, x + w, y, x + w, y + h, x, y + h];\n for (let i = 0, ii = clips.length; i < ii; ++i) {\n if (z !== currentZ && currentZ < clipZs[i]) {\n const clip = clips[i];\n if (\n intersects(\n [x, y, x + w, y + h],\n [clip[0], clip[3], clip[4], clip[7]]\n )\n ) {\n if (!contextSaved) {\n context.save();\n contextSaved = true;\n }\n context.beginPath();\n // counter-clockwise (outer ring) for current tile\n context.moveTo(currentClip[0], currentClip[1]);\n context.lineTo(currentClip[2], currentClip[3]);\n context.lineTo(currentClip[4], currentClip[5]);\n context.lineTo(currentClip[6], currentClip[7]);\n // clockwise (inner ring) for higher z tile\n context.moveTo(clip[6], clip[7]);\n context.lineTo(clip[4], clip[5]);\n context.lineTo(clip[2], clip[3]);\n context.lineTo(clip[0], clip[1]);\n context.clip();\n }\n }\n }\n clips.push(currentClip);\n clipZs.push(currentZ);\n } else {\n context.clearRect(x, y, w, h);\n }\n }\n this.drawTileImage(\n tile,\n frameState,\n x,\n y,\n w,\n h,\n tileGutter,\n transition\n );\n if (clips && !inTransition) {\n if (contextSaved) {\n context.restore();\n }\n this.renderedTiles.unshift(tile);\n } else {\n this.renderedTiles.push(tile);\n }\n this.updateUsedTiles(frameState.usedTiles, tileSource, tile);\n }\n }\n\n this.renderedRevision = sourceRevision;\n this.renderedResolution = tileResolution;\n this.extentChanged =\n !this.renderedExtent_ || !equals(this.renderedExtent_, canvasExtent);\n this.renderedExtent_ = canvasExtent;\n this.renderedPixelRatio = pixelRatio;\n this.renderedProjection = projection;\n\n this.manageTilePyramid(\n frameState,\n tileSource,\n tileGrid,\n pixelRatio,\n projection,\n extent,\n z,\n tileLayer.getPreload()\n );\n this.scheduleExpireCache(frameState, tileSource);\n\n this.postRender(context, frameState);\n\n if (layerState.extent) {\n context.restore();\n }\n context.imageSmoothingEnabled = true;\n\n if (canvasTransform !== canvas.style.transform) {\n canvas.style.transform = canvasTransform;\n }\n\n return this.container;\n }\n\n /**\n * @param {import(\"../../ImageTile.js\").default} tile Tile.\n * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n * @param {number} x Left of the tile.\n * @param {number} y Top of the tile.\n * @param {number} w Width of the tile.\n * @param {number} h Height of the tile.\n * @param {number} gutter Tile gutter.\n * @param {boolean} transition Apply an alpha transition.\n */\n drawTileImage(tile, frameState, x, y, w, h, gutter, transition) {\n const image = this.getTileImage(tile);\n if (!image) {\n return;\n }\n const uid = getUid(this);\n const layerState = frameState.layerStatesArray[frameState.layerIndex];\n const alpha =\n layerState.opacity *\n (transition ? tile.getAlpha(uid, frameState.time) : 1);\n const alphaChanged = alpha !== this.context.globalAlpha;\n if (alphaChanged) {\n this.context.save();\n this.context.globalAlpha = alpha;\n }\n this.context.drawImage(\n image,\n gutter,\n gutter,\n image.width - 2 * gutter,\n image.height - 2 * gutter,\n x,\n y,\n w,\n h\n );\n\n if (alphaChanged) {\n this.context.restore();\n }\n if (alpha !== layerState.opacity) {\n frameState.animate = true;\n } else if (transition) {\n tile.endTransition(uid);\n }\n }\n\n /**\n * @return {HTMLCanvasElement} Image\n */\n getImage() {\n const context = this.context;\n return context ? context.canvas : null;\n }\n\n /**\n * Get the image from a tile.\n * @param {import(\"../../ImageTile.js\").default} tile Tile.\n * @return {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} Image.\n * @protected\n */\n getTileImage(tile) {\n return tile.getImage();\n }\n\n /**\n * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n * @param {import(\"../../source/Tile.js\").default} tileSource Tile source.\n * @protected\n */\n scheduleExpireCache(frameState, tileSource) {\n if (tileSource.canExpireCache()) {\n /**\n * @param {import(\"../../source/Tile.js\").default} tileSource Tile source.\n * @param {import(\"../../Map.js\").default} map Map.\n * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n */\n const postRenderFunction = function (tileSource, map, frameState) {\n const tileSourceKey = getUid(tileSource);\n if (tileSourceKey in frameState.usedTiles) {\n tileSource.expireCache(\n frameState.viewState.projection,\n frameState.usedTiles[tileSourceKey]\n );\n }\n }.bind(null, tileSource);\n\n frameState.postRenderFunctions.push(\n /** @type {import(\"../../Map.js\").PostRenderFunction} */ (\n postRenderFunction\n )\n );\n }\n }\n\n /**\n * @param {!Object>} usedTiles Used tiles.\n * @param {import(\"../../source/Tile.js\").default} tileSource Tile source.\n * @param {import('../../Tile.js').default} tile Tile.\n * @protected\n */\n updateUsedTiles(usedTiles, tileSource, tile) {\n // FIXME should we use tilesToDrawByZ instead?\n const tileSourceKey = getUid(tileSource);\n if (!(tileSourceKey in usedTiles)) {\n usedTiles[tileSourceKey] = {};\n }\n usedTiles[tileSourceKey][tile.getKey()] = true;\n }\n\n /**\n * Manage tile pyramid.\n * This function performs a number of functions related to the tiles at the\n * current zoom and lower zoom levels:\n * - registers idle tiles in frameState.wantedTiles so that they are not\n * discarded by the tile queue\n * - enqueues missing tiles\n * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n * @param {import(\"../../source/Tile.js\").default} tileSource Tile source.\n * @param {import(\"../../tilegrid/TileGrid.js\").default} tileGrid Tile grid.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"../../proj/Projection.js\").default} projection Projection.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @param {number} currentZ Current Z.\n * @param {number} preload Load low resolution tiles up to `preload` levels.\n * @param {function(import(\"../../Tile.js\").default):void} [tileCallback] Tile callback.\n * @protected\n */\n manageTilePyramid(\n frameState,\n tileSource,\n tileGrid,\n pixelRatio,\n projection,\n extent,\n currentZ,\n preload,\n tileCallback\n ) {\n const tileSourceKey = getUid(tileSource);\n if (!(tileSourceKey in frameState.wantedTiles)) {\n frameState.wantedTiles[tileSourceKey] = {};\n }\n const wantedTiles = frameState.wantedTiles[tileSourceKey];\n const tileQueue = frameState.tileQueue;\n const minZoom = tileGrid.getMinZoom();\n const rotation = frameState.viewState.rotation;\n const viewport = rotation\n ? getRotatedViewport(\n frameState.viewState.center,\n frameState.viewState.resolution,\n rotation,\n frameState.size\n )\n : undefined;\n let tileCount = 0;\n let tile, tileRange, tileResolution, x, y, z;\n for (z = minZoom; z <= currentZ; ++z) {\n tileRange = tileGrid.getTileRangeForExtentAndZ(extent, z, tileRange);\n tileResolution = tileGrid.getResolution(z);\n for (x = tileRange.minX; x <= tileRange.maxX; ++x) {\n for (y = tileRange.minY; y <= tileRange.maxY; ++y) {\n if (\n rotation &&\n !tileGrid.tileCoordIntersectsViewport([z, x, y], viewport)\n ) {\n continue;\n }\n if (currentZ - z <= preload) {\n ++tileCount;\n tile = tileSource.getTile(z, x, y, pixelRatio, projection);\n if (tile.getState() == TileState.IDLE) {\n wantedTiles[tile.getKey()] = true;\n if (!tileQueue.isKeyQueued(tile.getKey())) {\n tileQueue.enqueue([\n tile,\n tileSourceKey,\n tileGrid.getTileCoordCenter(tile.tileCoord),\n tileResolution,\n ]);\n }\n }\n if (tileCallback !== undefined) {\n tileCallback(tile);\n }\n } else {\n tileSource.useTile(z, x, y, projection);\n }\n }\n }\n }\n tileSource.updateCacheSize(tileCount, projection);\n }\n}\n\nexport default CanvasTileLayerRenderer;\n","/**\n * @module ol/layer/Tile\n */\nimport BaseTileLayer from './BaseTile.js';\nimport CanvasTileLayerRenderer from '../renderer/canvas/TileLayer.js';\n\n/**\n * @classdesc\n * For layer sources that provide pre-rendered, tiled images in grids that are\n * organized by zoom levels for specific resolutions.\n * Note that any property set in the options is set as a {@link module:ol/Object~BaseObject}\n * property on the layer object; for example, setting `title: 'My Title'` in the\n * options means that `title` is observable, and has get/set accessors.\n *\n * @template {import(\"../source/Tile.js\").default} TileSourceType\n * @extends BaseTileLayer\n * @api\n */\nclass TileLayer extends BaseTileLayer {\n /**\n * @param {import(\"./BaseTile.js\").Options} [options] Tile layer options.\n */\n constructor(options) {\n super(options);\n }\n\n createRenderer() {\n return new CanvasTileLayerRenderer(this);\n }\n}\n\nexport default TileLayer;\n","/**\n * @module ol/source/Raster\n */\nimport Disposable from '../Disposable.js';\nimport Event from '../events/Event.js';\nimport EventType from '../events/EventType.js';\nimport ImageCanvas from '../ImageCanvas.js';\nimport ImageLayer from '../layer/Image.js';\nimport ImageSource from './Image.js';\nimport Source from './Source.js';\nimport TileLayer from '../layer/Tile.js';\nimport TileQueue from '../TileQueue.js';\nimport TileSource from './Tile.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {create as createTransform} from '../transform.js';\nimport {equals, getCenter, getHeight, getWidth} from '../extent.js';\nimport {getUid} from '../util.js';\n\nlet hasImageData = true;\ntry {\n new ImageData(10, 10);\n} catch (_) {\n hasImageData = false;\n}\n\n/** @type {CanvasRenderingContext2D} */\nlet context;\n\n/**\n * @param {Uint8ClampedArray} data Image data.\n * @param {number} width Number of columns.\n * @param {number} height Number of rows.\n * @return {ImageData} Image data.\n */\nexport function newImageData(data, width, height) {\n if (hasImageData) {\n return new ImageData(data, width, height);\n }\n\n if (!context) {\n context = document.createElement('canvas').getContext('2d');\n }\n const imageData = context.createImageData(width, height);\n imageData.data.set(data);\n return imageData;\n}\n\n/**\n * @typedef {Object} MinionData\n * @property {Array} buffers Array of buffers.\n * @property {Object} meta Operation metadata.\n * @property {boolean} imageOps The operation is an image operation.\n * @property {number} width The width of the image.\n * @property {number} height The height of the image.\n */\n\n/* istanbul ignore next */\n/**\n * Create a function for running operations. This function is serialized for\n * use in a worker.\n * @param {function(Array, Object):*} operation The operation.\n * @return {function(MinionData):ArrayBuffer} A function that takes an object with\n * buffers, meta, imageOps, width, and height properties and returns an array\n * buffer.\n */\nfunction createMinion(operation) {\n let workerHasImageData = true;\n try {\n new ImageData(10, 10);\n } catch (_) {\n workerHasImageData = false;\n }\n\n function newWorkerImageData(data, width, height) {\n if (workerHasImageData) {\n return new ImageData(data, width, height);\n }\n return {data: data, width: width, height: height};\n }\n\n return function (data) {\n // bracket notation for minification support\n const buffers = data['buffers'];\n const meta = data['meta'];\n const imageOps = data['imageOps'];\n const width = data['width'];\n const height = data['height'];\n\n const numBuffers = buffers.length;\n const numBytes = buffers[0].byteLength;\n\n if (imageOps) {\n const images = new Array(numBuffers);\n for (let b = 0; b < numBuffers; ++b) {\n images[b] = newWorkerImageData(\n new Uint8ClampedArray(buffers[b]),\n width,\n height\n );\n }\n const output = operation(images, meta).data;\n return output.buffer;\n }\n\n const output = new Uint8ClampedArray(numBytes);\n const arrays = new Array(numBuffers);\n const pixels = new Array(numBuffers);\n for (let b = 0; b < numBuffers; ++b) {\n arrays[b] = new Uint8ClampedArray(buffers[b]);\n pixels[b] = [0, 0, 0, 0];\n }\n for (let i = 0; i < numBytes; i += 4) {\n for (let j = 0; j < numBuffers; ++j) {\n const array = arrays[j];\n pixels[j][0] = array[i];\n pixels[j][1] = array[i + 1];\n pixels[j][2] = array[i + 2];\n pixels[j][3] = array[i + 3];\n }\n const pixel = operation(pixels, meta);\n output[i] = pixel[0];\n output[i + 1] = pixel[1];\n output[i + 2] = pixel[2];\n output[i + 3] = pixel[3];\n }\n return output.buffer;\n };\n}\n\n/**\n * Create a worker for running operations.\n * @param {ProcessorOptions} config Processor options.\n * @param {function(MessageEvent): void} onMessage Called with a message event.\n * @return {Worker} The worker.\n */\nfunction createWorker(config, onMessage) {\n const lib = Object.keys(config.lib || {}).map(function (name) {\n return 'const ' + name + ' = ' + config.lib[name].toString() + ';';\n });\n\n const lines = lib.concat([\n 'const __minion__ = (' + createMinion.toString() + ')(',\n config.operation.toString(),\n ');',\n 'self.addEventListener(\"message\", function(event) {',\n ' const buffer = __minion__(event.data);',\n ' self.postMessage({buffer: buffer, meta: event.data.meta}, [buffer]);',\n '});',\n ]);\n\n const worker = new Worker(\n typeof Blob === 'undefined'\n ? 'data:text/javascript;base64,' +\n Buffer.from(lines.join('\\n'), 'binary').toString('base64')\n : URL.createObjectURL(new Blob(lines, {type: 'text/javascript'}))\n );\n worker.addEventListener('message', onMessage);\n return worker;\n}\n\n/**\n * @typedef {Object} FauxMessageEvent\n * @property {Object} data Message data.\n */\n\n/**\n * Create a faux worker for running operations.\n * @param {ProcessorOptions} config Configuration.\n * @param {function(FauxMessageEvent): void} onMessage Called with a message event.\n * @return {Object} The faux worker.\n */\nfunction createFauxWorker(config, onMessage) {\n const minion = createMinion(config.operation);\n let terminated = false;\n return {\n postMessage: function (data) {\n setTimeout(function () {\n if (terminated) {\n return;\n }\n onMessage({data: {buffer: minion(data), meta: data['meta']}});\n }, 0);\n },\n terminate: function () {\n terminated = true;\n },\n };\n}\n\n/**\n * @typedef {function(Error, ImageData, (Object|Array)): void} JobCallback\n */\n\n/**\n * @typedef {Object} Job\n * @property {Object} meta Job metadata.\n * @property {Array} inputs Array of input data.\n * @property {JobCallback} callback Called when the job is complete.\n */\n\n/**\n * @typedef {Object} ProcessorOptions\n * @property {number} threads Number of workers to spawn.\n * @property {Operation} operation The operation.\n * @property {Object} [lib] Functions that will be made available to operations run in a worker.\n * @property {number} queue The number of queued jobs to allow.\n * @property {boolean} [imageOps=false] Pass all the image data to the operation instead of a single pixel.\n */\n\n/**\n * @classdesc\n * A processor runs pixel or image operations in workers.\n */\nexport class Processor extends Disposable {\n /**\n * @param {ProcessorOptions} config Configuration.\n */\n constructor(config) {\n super();\n\n this._imageOps = !!config.imageOps;\n let threads;\n if (config.threads === 0) {\n threads = 0;\n } else if (this._imageOps) {\n threads = 1;\n } else {\n threads = config.threads || 1;\n }\n\n /**\n * @type {Array}\n */\n const workers = new Array(threads);\n if (threads) {\n for (let i = 0; i < threads; ++i) {\n workers[i] = createWorker(config, this._onWorkerMessage.bind(this, i));\n }\n } else {\n workers[0] = createFauxWorker(\n config,\n this._onWorkerMessage.bind(this, 0)\n );\n }\n this._workers = workers;\n\n /**\n * @type {Array}\n * @private\n */\n this._queue = [];\n\n this._maxQueueLength = config.queue || Infinity;\n this._running = 0;\n\n /**\n * @type {Object}\n * @private\n */\n this._dataLookup = {};\n\n /**\n * @type {Job}\n * @private\n */\n this._job = null;\n }\n\n /**\n * Run operation on input data.\n * @param {Array} inputs Array of image data.\n * @param {Object} meta A user data object. This is passed to all operations\n * and must be serializable.\n * @param {function(Error, ImageData, Object): void} callback Called when work\n * completes. The first argument is any error. The second is the ImageData\n * generated by operations. The third is the user data object.\n */\n process(inputs, meta, callback) {\n this._enqueue({\n inputs: inputs,\n meta: meta,\n callback: callback,\n });\n this._dispatch();\n }\n\n /**\n * Add a job to the queue.\n * @param {Job} job The job.\n */\n _enqueue(job) {\n this._queue.push(job);\n while (this._queue.length > this._maxQueueLength) {\n this._queue.shift().callback(null, null);\n }\n }\n\n /**\n * Dispatch a job.\n */\n _dispatch() {\n if (this._running || this._queue.length === 0) {\n return;\n }\n\n const job = this._queue.shift();\n this._job = job;\n const width = job.inputs[0].width;\n const height = job.inputs[0].height;\n const buffers = job.inputs.map(function (input) {\n return input.data.buffer;\n });\n const threads = this._workers.length;\n this._running = threads;\n if (threads === 1) {\n this._workers[0].postMessage(\n {\n buffers: buffers,\n meta: job.meta,\n imageOps: this._imageOps,\n width: width,\n height: height,\n },\n buffers\n );\n return;\n }\n\n const length = job.inputs[0].data.length;\n const segmentLength = 4 * Math.ceil(length / 4 / threads);\n for (let i = 0; i < threads; ++i) {\n const offset = i * segmentLength;\n const slices = [];\n for (let j = 0, jj = buffers.length; j < jj; ++j) {\n slices.push(buffers[j].slice(offset, offset + segmentLength));\n }\n this._workers[i].postMessage(\n {\n buffers: slices,\n meta: job.meta,\n imageOps: this._imageOps,\n width: width,\n height: height,\n },\n slices\n );\n }\n }\n\n /**\n * Handle messages from the worker.\n * @param {number} index The worker index.\n * @param {MessageEvent} event The message event.\n */\n _onWorkerMessage(index, event) {\n if (this.disposed) {\n return;\n }\n this._dataLookup[index] = event.data;\n --this._running;\n if (this._running === 0) {\n this._resolveJob();\n }\n }\n\n /**\n * Resolve a job. If there are no more worker threads, the processor callback\n * will be called.\n */\n _resolveJob() {\n const job = this._job;\n const threads = this._workers.length;\n let data, meta;\n if (threads === 1) {\n data = new Uint8ClampedArray(this._dataLookup[0]['buffer']);\n meta = this._dataLookup[0]['meta'];\n } else {\n const length = job.inputs[0].data.length;\n data = new Uint8ClampedArray(length);\n meta = new Array(threads);\n const segmentLength = 4 * Math.ceil(length / 4 / threads);\n for (let i = 0; i < threads; ++i) {\n const buffer = this._dataLookup[i]['buffer'];\n const offset = i * segmentLength;\n data.set(new Uint8ClampedArray(buffer), offset);\n meta[i] = this._dataLookup[i]['meta'];\n }\n }\n this._job = null;\n this._dataLookup = {};\n job.callback(\n null,\n newImageData(data, job.inputs[0].width, job.inputs[0].height),\n meta\n );\n this._dispatch();\n }\n\n /**\n * Terminate all workers associated with the processor.\n */\n disposeInternal() {\n for (let i = 0; i < this._workers.length; ++i) {\n this._workers[i].terminate();\n }\n this._workers.length = 0;\n }\n}\n\n/**\n * A function that takes an array of input data, performs some operation, and\n * returns an array of output data.\n * For `pixel` type operations, the function will be called with an array of\n * pixels, where each pixel is an array of four numbers (`[r, g, b, a]`) in the\n * range of 0 - 255. It should return a single pixel array.\n * For `'image'` type operations, functions will be called with an array of\n * [ImageData](https://developer.mozilla.org/en-US/docs/Web/API/ImageData)\n * and should return a single\n * [ImageData](https://developer.mozilla.org/en-US/docs/Web/API/ImageData).\n * The operations\n * are called with a second \"data\" argument, which can be used for storage. The\n * data object is accessible from raster events, where it can be initialized in\n * \"beforeoperations\" and accessed again in \"afteroperations\".\n *\n * @typedef {function((Array>|Array), Object):\n * (Array|ImageData)} Operation\n */\n\n/**\n * @enum {string}\n */\nconst RasterEventType = {\n /**\n * Triggered before operations are run. Listeners will receive an event object with\n * a `data` property that can be used to make data available to operations.\n * @event module:ol/source/Raster.RasterSourceEvent#beforeoperations\n * @api\n */\n BEFOREOPERATIONS: 'beforeoperations',\n\n /**\n * Triggered after operations are run. Listeners will receive an event object with\n * a `data` property. If more than one thread is used, `data` will be an array of\n * objects. If a single thread is used, `data` will be a single object.\n * @event module:ol/source/Raster.RasterSourceEvent#afteroperations\n * @api\n */\n AFTEROPERATIONS: 'afteroperations',\n};\n\n/**\n * @typedef {'pixel' | 'image'} RasterOperationType\n * Raster operation type. Supported values are `'pixel'` and `'image'`.\n */\n\n/**\n * @typedef {import(\"./Image.js\").ImageSourceEventTypes|'beforeoperations'|'afteroperations'} RasterSourceEventTypes\n */\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/source/Raster~RasterSource} instances are instances of this\n * type.\n */\nexport class RasterSourceEvent extends Event {\n /**\n * @param {string} type Type.\n * @param {import(\"../Map.js\").FrameState} frameState The frame state.\n * @param {Object|Array} data An object made available to operations. For \"afteroperations\" evenets\n * this will be an array of objects if more than one thread is used.\n */\n constructor(type, frameState, data) {\n super(type);\n\n /**\n * The raster extent.\n * @type {import(\"../extent.js\").Extent}\n * @api\n */\n this.extent = frameState.extent;\n\n /**\n * The pixel resolution (map units per pixel).\n * @type {number}\n * @api\n */\n this.resolution = frameState.viewState.resolution / frameState.pixelRatio;\n\n /**\n * An object made available to all operations. This can be used by operations\n * as a storage object (e.g. for calculating statistics).\n * @type {Object}\n * @api\n */\n this.data = data;\n }\n}\n\n/**\n * @typedef {Object} Options\n * @property {Array} sources Input\n * sources or layers. For vector data, use an VectorImage layer.\n * @property {Operation} [operation] Raster operation.\n * The operation will be called with data from input sources\n * and the output will be assigned to the raster source.\n * @property {Object} [lib] Functions that will be made available to operations run in a worker.\n * @property {number} [threads] By default, operations will be run in a single worker thread.\n * To avoid using workers altogether, set `threads: 0`. For pixel operations, operations can\n * be run in multiple worker threads. Note that there is additional overhead in\n * transferring data to multiple workers, and that depending on the user's\n * system, it may not be possible to parallelize the work.\n * @property {RasterOperationType} [operationType='pixel'] Operation type.\n * Supported values are `'pixel'` and `'image'`. By default,\n * `'pixel'` operations are assumed, and operations will be called with an\n * array of pixels from input sources. If set to `'image'`, operations will\n * be called with an array of ImageData objects from input sources.\n * @property {Array|null} [resolutions] Resolutions. If specified, raster operations will only\n * be run at the given resolutions. By default, the resolutions of the first source with resolutions\n * specified will be used, if any. Set to `null` to use any view resolution instead.\n */\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature &\n * import(\"../Observable\").OnSignature &\n * import(\"../Observable\").OnSignature &\n * import(\"../Observable\").OnSignature &\n * import(\"../Observable\").CombinedOnSignature} RasterSourceOnSignature\n */\n\n/**\n * @classdesc\n * A source that transforms data from any number of input sources using an\n * {@link module:ol/source/Raster~Operation} function to transform input pixel values into\n * output pixel values.\n *\n * @fires module:ol/source/Raster.RasterSourceEvent\n * @api\n */\nclass RasterSource extends ImageSource {\n /**\n * @param {Options} options Options.\n */\n constructor(options) {\n super({\n projection: null,\n });\n\n /***\n * @type {RasterSourceOnSignature}\n */\n this.on;\n\n /***\n * @type {RasterSourceOnSignature}\n */\n this.once;\n\n /***\n * @type {RasterSourceOnSignature}\n */\n this.un;\n\n /**\n * @private\n * @type {Processor}\n */\n this.processor_ = null;\n\n /**\n * @private\n * @type {RasterOperationType}\n */\n this.operationType_ =\n options.operationType !== undefined ? options.operationType : 'pixel';\n\n /**\n * @private\n * @type {number}\n */\n this.threads_ = options.threads !== undefined ? options.threads : 1;\n\n /**\n * @private\n * @type {Array}\n */\n this.layers_ = createLayers(options.sources);\n\n const changed = this.changed.bind(this);\n for (let i = 0, ii = this.layers_.length; i < ii; ++i) {\n this.layers_[i].addEventListener(EventType.CHANGE, changed);\n }\n\n /** @type {boolean} */\n this.useResolutions_ = options.resolutions !== null;\n\n /**\n * @private\n * @type {import(\"../TileQueue.js\").default}\n */\n this.tileQueue_ = new TileQueue(function () {\n return 1;\n }, this.changed.bind(this));\n\n /**\n * The most recently requested frame state.\n * @type {import(\"../Map.js\").FrameState}\n * @private\n */\n this.requestedFrameState_;\n\n /**\n * The most recently rendered image canvas.\n * @type {import(\"../ImageCanvas.js\").default}\n * @private\n */\n this.renderedImageCanvas_ = null;\n\n /**\n * The most recently rendered revision.\n * @type {number}\n */\n this.renderedRevision_;\n\n /**\n * @private\n * @type {import(\"../Map.js\").FrameState}\n */\n this.frameState_ = {\n animate: false,\n coordinateToPixelTransform: createTransform(),\n declutterTree: null,\n extent: null,\n index: 0,\n layerIndex: 0,\n layerStatesArray: getLayerStatesArray(this.layers_),\n pixelRatio: 1,\n pixelToCoordinateTransform: createTransform(),\n postRenderFunctions: [],\n size: [0, 0],\n tileQueue: this.tileQueue_,\n time: Date.now(),\n usedTiles: {},\n viewState: /** @type {import(\"../View.js\").State} */ ({\n rotation: 0,\n }),\n viewHints: [],\n wantedTiles: {},\n mapId: getUid(this),\n renderTargets: {},\n };\n\n this.setAttributions(function (frameState) {\n const attributions = [];\n for (\n let index = 0, iMax = options.sources.length;\n index < iMax;\n ++index\n ) {\n const sourceOrLayer = options.sources[index];\n const source =\n sourceOrLayer instanceof Source\n ? sourceOrLayer\n : sourceOrLayer.getSource();\n if (!source) {\n continue;\n }\n const attributionGetter = source.getAttributions();\n if (typeof attributionGetter === 'function') {\n const sourceAttribution = attributionGetter(frameState);\n attributions.push.apply(attributions, sourceAttribution);\n }\n }\n return attributions.length !== 0 ? attributions : null;\n });\n\n if (options.operation !== undefined) {\n this.setOperation(options.operation, options.lib);\n }\n }\n\n /**\n * Set the operation.\n * @param {Operation} operation New operation.\n * @param {Object} [lib] Functions that will be available to operations run\n * in a worker.\n * @api\n */\n setOperation(operation, lib) {\n if (this.processor_) {\n this.processor_.dispose();\n }\n\n this.processor_ = new Processor({\n operation: operation,\n imageOps: this.operationType_ === 'image',\n queue: 1,\n lib: lib,\n threads: this.threads_,\n });\n this.changed();\n }\n\n /**\n * Update the stored frame state.\n * @param {import(\"../extent.js\").Extent} extent The view extent (in map units).\n * @param {number} resolution The view resolution.\n * @param {import(\"../proj/Projection.js\").default} projection The view projection.\n * @return {import(\"../Map.js\").FrameState} The updated frame state.\n * @private\n */\n updateFrameState_(extent, resolution, projection) {\n const frameState = /** @type {import(\"../Map.js\").FrameState} */ (\n Object.assign({}, this.frameState_)\n );\n\n frameState.viewState = /** @type {import(\"../View.js\").State} */ (\n Object.assign({}, frameState.viewState)\n );\n\n const center = getCenter(extent);\n\n frameState.size[0] = Math.ceil(getWidth(extent) / resolution);\n frameState.size[1] = Math.ceil(getHeight(extent) / resolution);\n frameState.extent = [\n center[0] - (frameState.size[0] * resolution) / 2,\n center[1] - (frameState.size[1] * resolution) / 2,\n center[0] + (frameState.size[0] * resolution) / 2,\n center[1] + (frameState.size[1] * resolution) / 2,\n ];\n frameState.time = Date.now();\n\n const viewState = frameState.viewState;\n viewState.center = center;\n viewState.projection = projection;\n viewState.resolution = resolution;\n return frameState;\n }\n\n /**\n * Determine if all sources are ready.\n * @return {boolean} All sources are ready.\n * @private\n */\n allSourcesReady_() {\n let ready = true;\n let source;\n for (let i = 0, ii = this.layers_.length; i < ii; ++i) {\n source = this.layers_[i].getSource();\n if (!source || source.getState() !== 'ready') {\n ready = false;\n break;\n }\n }\n return ready;\n }\n\n /**\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {import(\"../ImageCanvas.js\").default} Single image.\n */\n getImage(extent, resolution, pixelRatio, projection) {\n if (!this.allSourcesReady_()) {\n return null;\n }\n\n resolution = this.findNearestResolution(resolution);\n const frameState = this.updateFrameState_(extent, resolution, projection);\n this.requestedFrameState_ = frameState;\n\n // check if we can't reuse the existing ol/ImageCanvas\n if (this.renderedImageCanvas_) {\n const renderedResolution = this.renderedImageCanvas_.getResolution();\n const renderedExtent = this.renderedImageCanvas_.getExtent();\n if (\n resolution !== renderedResolution ||\n !equals(frameState.extent, renderedExtent)\n ) {\n this.renderedImageCanvas_ = null;\n }\n }\n\n if (\n !this.renderedImageCanvas_ ||\n this.getRevision() !== this.renderedRevision_\n ) {\n this.processSources_();\n }\n\n frameState.tileQueue.loadMoreTiles(16, 16);\n\n if (frameState.animate) {\n requestAnimationFrame(this.changed.bind(this));\n }\n\n return this.renderedImageCanvas_;\n }\n\n /**\n * Start processing source data.\n * @private\n */\n processSources_() {\n const frameState = this.requestedFrameState_;\n const len = this.layers_.length;\n const imageDatas = new Array(len);\n for (let i = 0; i < len; ++i) {\n frameState.layerIndex = i;\n const imageData = getImageData(this.layers_[i], frameState);\n if (imageData) {\n imageDatas[i] = imageData;\n } else {\n return;\n }\n }\n\n const data = {};\n this.dispatchEvent(\n new RasterSourceEvent(RasterEventType.BEFOREOPERATIONS, frameState, data)\n );\n this.processor_.process(\n imageDatas,\n data,\n this.onWorkerComplete_.bind(this, frameState)\n );\n }\n\n /**\n * Called when pixel processing is complete.\n * @param {import(\"../Map.js\").FrameState} frameState The frame state.\n * @param {Error} err Any error during processing.\n * @param {ImageData} output The output image data.\n * @param {Object|Array} data The user data (or an array if more than one thread).\n * @private\n */\n onWorkerComplete_(frameState, err, output, data) {\n if (err || !output) {\n return;\n }\n\n // do nothing if extent or resolution changed\n const extent = frameState.extent;\n const resolution = frameState.viewState.resolution;\n if (\n resolution !== this.requestedFrameState_.viewState.resolution ||\n !equals(extent, this.requestedFrameState_.extent)\n ) {\n return;\n }\n\n let context;\n if (this.renderedImageCanvas_) {\n context = this.renderedImageCanvas_.getImage().getContext('2d');\n } else {\n const width = Math.round(getWidth(extent) / resolution);\n const height = Math.round(getHeight(extent) / resolution);\n context = createCanvasContext2D(width, height);\n this.renderedImageCanvas_ = new ImageCanvas(\n extent,\n resolution,\n 1,\n context.canvas\n );\n }\n context.putImageData(output, 0, 0);\n\n this.changed();\n this.renderedRevision_ = this.getRevision();\n\n this.dispatchEvent(\n new RasterSourceEvent(RasterEventType.AFTEROPERATIONS, frameState, data)\n );\n if (frameState.animate) {\n requestAnimationFrame(this.changed.bind(this));\n }\n }\n\n /**\n * @param {import(\"../proj/Projection\").default} [projection] Projection.\n * @return {Array|null} Resolutions.\n */\n getResolutions(projection) {\n if (!this.useResolutions_) {\n return null;\n }\n let resolutions = super.getResolutions();\n if (!resolutions) {\n for (let i = 0, ii = this.layers_.length; i < ii; ++i) {\n const source = this.layers_[i].getSource();\n resolutions = source.getResolutions(projection);\n if (resolutions) {\n break;\n }\n }\n }\n return resolutions;\n }\n\n disposeInternal() {\n if (this.processor_) {\n this.processor_.dispose();\n }\n super.disposeInternal();\n }\n}\n\n/**\n * Clean up and unregister the worker.\n * @function\n * @api\n */\nRasterSource.prototype.dispose;\n\n/**\n * A reusable canvas context.\n * @type {CanvasRenderingContext2D}\n * @private\n */\nlet sharedContext = null;\n\n/**\n * Get image data from a layer.\n * @param {import(\"../layer/Layer.js\").default} layer Layer to render.\n * @param {import(\"../Map.js\").FrameState} frameState The frame state.\n * @return {ImageData} The image data.\n */\nfunction getImageData(layer, frameState) {\n const renderer = layer.getRenderer();\n if (!renderer) {\n throw new Error('Unsupported layer type: ' + layer);\n }\n\n if (!renderer.prepareFrame(frameState)) {\n return null;\n }\n const width = frameState.size[0];\n const height = frameState.size[1];\n if (width === 0 || height === 0) {\n return null;\n }\n const container = renderer.renderFrame(frameState, null);\n let element;\n if (container instanceof HTMLCanvasElement) {\n element = container;\n } else {\n if (container) {\n element = container.firstElementChild;\n }\n if (!(element instanceof HTMLCanvasElement)) {\n throw new Error('Unsupported rendered element: ' + element);\n }\n if (element.width === width && element.height === height) {\n const context = element.getContext('2d');\n return context.getImageData(0, 0, width, height);\n }\n }\n\n if (!sharedContext) {\n sharedContext = createCanvasContext2D(width, height, undefined, {\n willReadFrequently: true,\n });\n } else {\n const canvas = sharedContext.canvas;\n if (canvas.width !== width || canvas.height !== height) {\n sharedContext = createCanvasContext2D(width, height, undefined, {\n willReadFrequently: true,\n });\n } else {\n sharedContext.clearRect(0, 0, width, height);\n }\n }\n sharedContext.drawImage(element, 0, 0, width, height);\n return sharedContext.getImageData(0, 0, width, height);\n}\n\n/**\n * Get a list of layer states from a list of layers.\n * @param {Array} layers Layers.\n * @return {Array} The layer states.\n */\nfunction getLayerStatesArray(layers) {\n return layers.map(function (layer) {\n return layer.getLayerState();\n });\n}\n\n/**\n * Create layers for all sources.\n * @param {Array} sources The sources.\n * @return {Array} Array of layers.\n */\nfunction createLayers(sources) {\n const len = sources.length;\n const layers = new Array(len);\n for (let i = 0; i < len; ++i) {\n layers[i] = createLayer(sources[i]);\n }\n return layers;\n}\n\n/**\n * Create a layer for the provided source.\n * @param {import(\"./Source.js\").default|import(\"../layer/Layer.js\").default} layerOrSource The layer or source.\n * @return {import(\"../layer/Layer.js\").default} The layer.\n */\nfunction createLayer(layerOrSource) {\n // @type {import(\"../layer/Layer.js\").default}\n let layer;\n if (layerOrSource instanceof Source) {\n if (layerOrSource instanceof TileSource) {\n layer = new TileLayer({source: layerOrSource});\n } else if (layerOrSource instanceof ImageSource) {\n layer = new ImageLayer({source: layerOrSource});\n }\n } else {\n layer = layerOrSource;\n }\n return layer;\n}\n\nexport default RasterSource;\n","/**\n * @module ol/source/Stamen\n */\n\nimport XYZ from './XYZ.js';\nimport {ATTRIBUTION as OSM_ATTRIBUTION} from './OSM.js';\n\n/**\n * @const\n * @type {Array}\n */\nconst ATTRIBUTIONS = [\n 'Map tiles by Stamen Design, ' +\n 'under CC BY' +\n ' 3.0.',\n OSM_ATTRIBUTION,\n];\n\n/**\n * @type {Object}\n */\nconst LayerConfig = {\n 'terrain': {\n extension: 'png',\n opaque: true,\n },\n 'terrain-background': {\n extension: 'png',\n opaque: true,\n },\n 'terrain-labels': {\n extension: 'png',\n opaque: false,\n },\n 'terrain-lines': {\n extension: 'png',\n opaque: false,\n },\n 'toner-background': {\n extension: 'png',\n opaque: true,\n },\n 'toner': {\n extension: 'png',\n opaque: true,\n },\n 'toner-hybrid': {\n extension: 'png',\n opaque: false,\n },\n 'toner-labels': {\n extension: 'png',\n opaque: false,\n },\n 'toner-lines': {\n extension: 'png',\n opaque: false,\n },\n 'toner-lite': {\n extension: 'png',\n opaque: true,\n },\n 'watercolor': {\n extension: 'jpg',\n opaque: true,\n },\n};\n\n/**\n * @type {Object}\n */\nconst ProviderConfig = {\n 'terrain': {\n minZoom: 0,\n maxZoom: 18,\n },\n 'toner': {\n minZoom: 0,\n maxZoom: 20,\n },\n 'watercolor': {\n minZoom: 0,\n maxZoom: 18,\n },\n};\n\n/**\n * @typedef {Object} Options\n * @property {number} [cacheSize] Initial tile cache size. Will auto-grow to hold at least the number of tiles in the viewport.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling. By default,\n * linear interpolation is used when resampling. Set to false to use the nearest neighbor instead.\n * @property {string} layer Layer name.\n * @property {number} [minZoom] Minimum zoom.\n * @property {number} [maxZoom] Maximum zoom.\n * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {import(\"../Tile.js\").LoadFunction} [tileLoadFunction]\n * Optional function to load a tile given a URL. The default is\n * ```js\n * function(imageTile, src) {\n * imageTile.getImage().src = src;\n * };\n * ```\n * @property {number} [transition=250] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n * @property {string} [url] URL template. Must include `{x}`, `{y}` or `{-y}`, and `{z}` placeholders.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0]\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n */\n\n/**\n * @classdesc\n * Layer source for the Stamen tile server.\n * @api\n */\nclass Stamen extends XYZ {\n /**\n * @param {Options} options Stamen options.\n */\n constructor(options) {\n const i = options.layer.indexOf('-');\n const provider = i == -1 ? options.layer : options.layer.slice(0, i);\n const providerConfig = ProviderConfig[provider];\n\n const layerConfig = LayerConfig[options.layer];\n\n const url =\n options.url !== undefined\n ? options.url\n : 'https://stamen-tiles-{a-d}.a.ssl.fastly.net/' +\n options.layer +\n '/{z}/{x}/{y}.' +\n layerConfig.extension;\n\n super({\n attributions: ATTRIBUTIONS,\n cacheSize: options.cacheSize,\n crossOrigin: 'anonymous',\n interpolate: options.interpolate,\n maxZoom:\n options.maxZoom != undefined ? options.maxZoom : providerConfig.maxZoom,\n minZoom:\n options.minZoom != undefined ? options.minZoom : providerConfig.minZoom,\n opaque: layerConfig.opaque,\n reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n tileLoadFunction: options.tileLoadFunction,\n transition: options.transition,\n url: url,\n wrapX: options.wrapX,\n zDirection: options.zDirection,\n });\n }\n}\n\nexport default Stamen;\n","/**\n * @module ol/source/TileArcGISRest\n */\n\nimport TileImage from './TileImage.js';\nimport {appendParams} from '../uri.js';\nimport {createEmpty} from '../extent.js';\nimport {modulo} from '../math.js';\nimport {scale as scaleSize, toSize} from '../size.js';\nimport {hash as tileCoordHash} from '../tilecoord.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {number} [cacheSize] Initial tile cache size. Will auto-grow to hold at least the number of tiles in the viewport.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images. Note that\n * you must provide a `crossOrigin` value if you want to access pixel data with the Canvas renderer.\n * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling. By default,\n * linear interpolation is used when resampling. Set to false to use the nearest neighbor instead.\n * @property {Object} [params] ArcGIS Rest parameters. This field is optional. Service defaults will be\n * used for any fields not specified. `FORMAT` is `PNG32` by default. `F` is `IMAGE` by\n * default. `TRANSPARENT` is `true` by default. `BBOX`, `SIZE`, `BBOXSR`,\n * and `IMAGESR` will be set dynamically. Set `LAYERS` to\n * override the default service layer visibility. See\n * https://developers.arcgis.com/rest/services-reference/export-map.htm\n * for further reference.\n * @property {boolean} [hidpi=true] Use the `ol/Map#pixelRatio` value when requesting\n * the image from the remote server.\n * @property {import(\"../tilegrid/TileGrid.js\").default} [tileGrid] Tile grid. Base this on the resolutions,\n * tilesize and extent supported by the server.\n * If this is not defined, a default grid will be used: if there is a projection\n * extent, the grid will be based on that; if not, a grid based on a global\n * extent with origin at 0,0 will be used.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection. Default is the view projection.\n * The projection code must contain a numeric end portion separated by :\n * or the entire code must form a valid ArcGIS SpatialReference definition.\n * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {import(\"../Tile.js\").LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL.\n * The default is\n * ```js\n * function(imageTile, src) {\n * imageTile.getImage().src = src;\n * };\n * ```\n * @property {string} [url] ArcGIS Rest service URL for a Map Service or Image Service. The\n * url should include /MapServer or /ImageServer.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * @property {number} [transition] Duration of the opacity transition for rendering. To disable the opacity\n * transition, pass `transition: 0`.\n * @property {Array} [urls] ArcGIS Rest service urls. Use this instead of `url` when the ArcGIS\n * Service supports multiple urls for export requests.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0]\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n */\n\n/**\n * @classdesc\n * Layer source for tile data from ArcGIS Rest services. Map and Image\n * Services are supported.\n *\n * For cached ArcGIS services, better performance is available using the\n * {@link module:ol/source/XYZ~XYZ} data source.\n * @api\n */\nclass TileArcGISRest extends TileImage {\n /**\n * @param {Options} [options] Tile ArcGIS Rest options.\n */\n constructor(options) {\n options = options ? options : {};\n\n super({\n attributions: options.attributions,\n cacheSize: options.cacheSize,\n crossOrigin: options.crossOrigin,\n interpolate: options.interpolate,\n projection: options.projection,\n reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n tileGrid: options.tileGrid,\n tileLoadFunction: options.tileLoadFunction,\n url: options.url,\n urls: options.urls,\n wrapX: options.wrapX !== undefined ? options.wrapX : true,\n transition: options.transition,\n zDirection: options.zDirection,\n });\n\n /**\n * @private\n * @type {!Object}\n */\n this.params_ = options.params || {};\n\n /**\n * @private\n * @type {boolean}\n */\n this.hidpi_ = options.hidpi !== undefined ? options.hidpi : true;\n\n /**\n * @private\n * @type {import(\"../extent.js\").Extent}\n */\n this.tmpExtent_ = createEmpty();\n\n this.setKey(this.getKeyForParams_());\n }\n\n /**\n * @private\n * @return {string} The key for the current params.\n */\n getKeyForParams_() {\n let i = 0;\n const res = [];\n for (const key in this.params_) {\n res[i++] = key + '-' + this.params_[key];\n }\n return res.join('/');\n }\n\n /**\n * Get the user-provided params, i.e. those passed to the constructor through\n * the \"params\" option, and possibly updated using the updateParams method.\n * @return {Object} Params.\n * @api\n */\n getParams() {\n return this.params_;\n }\n\n /**\n * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {import(\"../size.js\").Size} tileSize Tile size.\n * @param {import(\"../extent.js\").Extent} tileExtent Tile extent.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @param {Object} params Params.\n * @return {string|undefined} Request URL.\n * @private\n */\n getRequestUrl_(\n tileCoord,\n tileSize,\n tileExtent,\n pixelRatio,\n projection,\n params\n ) {\n const urls = this.urls;\n if (!urls) {\n return undefined;\n }\n\n // ArcGIS Server only wants the numeric portion of the projection ID.\n // (if there is no numeric portion the entire projection code must\n // form a valid ArcGIS SpatialReference definition).\n const srid = projection\n .getCode()\n .split(/:(?=\\d+$)/)\n .pop();\n\n params['SIZE'] = tileSize[0] + ',' + tileSize[1];\n params['BBOX'] = tileExtent.join(',');\n params['BBOXSR'] = srid;\n params['IMAGESR'] = srid;\n params['DPI'] = Math.round(\n params['DPI'] ? params['DPI'] * pixelRatio : 90 * pixelRatio\n );\n\n let url;\n if (urls.length == 1) {\n url = urls[0];\n } else {\n const index = modulo(tileCoordHash(tileCoord), urls.length);\n url = urls[index];\n }\n\n const modifiedUrl = url\n .replace(/MapServer\\/?$/, 'MapServer/export')\n .replace(/ImageServer\\/?$/, 'ImageServer/exportImage');\n return appendParams(modifiedUrl, params);\n }\n\n /**\n * Get the tile pixel ratio for this source.\n * @param {number} pixelRatio Pixel ratio.\n * @return {number} Tile pixel ratio.\n */\n getTilePixelRatio(pixelRatio) {\n return this.hidpi_ ? pixelRatio : 1;\n }\n\n /**\n * Update the user-provided params.\n * @param {Object} params Params.\n * @api\n */\n updateParams(params) {\n Object.assign(this.params_, params);\n this.setKey(this.getKeyForParams_());\n }\n\n /**\n * @param {import(\"../tilecoord.js\").TileCoord} tileCoord The tile coordinate\n * @param {number} pixelRatio The pixel ratio\n * @param {import(\"../proj/Projection.js\").default} projection The projection\n * @return {string|undefined} The tile URL\n * @override\n */\n tileUrlFunction(tileCoord, pixelRatio, projection) {\n let tileGrid = this.getTileGrid();\n if (!tileGrid) {\n tileGrid = this.getTileGridForProjection(projection);\n }\n\n if (tileGrid.getResolutions().length <= tileCoord[0]) {\n return undefined;\n }\n\n if (pixelRatio != 1 && !this.hidpi_) {\n pixelRatio = 1;\n }\n\n const tileExtent = tileGrid.getTileCoordExtent(tileCoord, this.tmpExtent_);\n let tileSize = toSize(tileGrid.getTileSize(tileCoord[0]), this.tmpSize);\n\n if (pixelRatio != 1) {\n tileSize = scaleSize(tileSize, pixelRatio, this.tmpSize);\n }\n\n // Apply default params and override with user specified values.\n const baseParams = {\n 'F': 'image',\n 'FORMAT': 'PNG32',\n 'TRANSPARENT': true,\n };\n Object.assign(baseParams, this.params_);\n\n return this.getRequestUrl_(\n tileCoord,\n tileSize,\n tileExtent,\n pixelRatio,\n projection,\n baseParams\n );\n }\n}\n\nexport default TileArcGISRest;\n","/**\n * @module ol/source/TileDebug\n */\n\nimport XYZ from './XYZ.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {toSize} from '../size.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../proj.js\").ProjectionLike} [projection='EPSG:3857'] Optional projection.\n * @property {import(\"../tilegrid/TileGrid.js\").default} [tileGrid] Tile grid.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0]\n * Set to `1` when debugging `VectorTile` sources with a default configuration.\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n * @property {string} [template='z:{z} x:{x} y:{y}'] Template for labeling the tiles.\n * Should include `{x}`, `{y}` or `{-y}`, and `{z}` placeholders.\n */\n\n/**\n * @classdesc\n * A pseudo tile source, which does not fetch tiles from a server, but renders\n * a grid outline for the tile grid/projection along with the coordinates for\n * each tile. See examples/canvas-tiles for an example.\n * @api\n */\nclass TileDebug extends XYZ {\n /**\n * @param {Options} [options] Debug tile options.\n */\n constructor(options) {\n /**\n * @type {Options}\n */\n options = options || {};\n\n super({\n opaque: false,\n projection: options.projection,\n tileGrid: options.tileGrid,\n wrapX: options.wrapX !== undefined ? options.wrapX : true,\n zDirection: options.zDirection,\n url: options.template || 'z:{z} x:{x} y:{y}',\n tileLoadFunction: (tile, text) => {\n const z = tile.getTileCoord()[0];\n const tileSize = toSize(this.tileGrid.getTileSize(z));\n const context = createCanvasContext2D(tileSize[0], tileSize[1]);\n\n context.strokeStyle = 'grey';\n context.strokeRect(0.5, 0.5, tileSize[0] + 0.5, tileSize[1] + 0.5);\n\n context.fillStyle = 'grey';\n context.strokeStyle = 'white';\n context.textAlign = 'center';\n context.textBaseline = 'middle';\n context.font = '24px sans-serif';\n context.lineWidth = 4;\n context.strokeText(text, tileSize[0] / 2, tileSize[1] / 2, tileSize[0]);\n context.fillText(text, tileSize[0] / 2, tileSize[1] / 2, tileSize[0]);\n\n /** @type {import(\"../ImageTile.js\").default} */ (tile).setImage(\n context.canvas\n );\n },\n });\n }\n}\n\nexport default TileDebug;\n","/**\n * @module ol/source/TileJSON\n */\n// FIXME check order of async callbacks\n\n/**\n * See https://mapbox.com/developers/api/.\n */\n\nimport TileImage from './TileImage.js';\nimport {applyTransform, intersects} from '../extent.js';\nimport {assert} from '../asserts.js';\nimport {createFromTemplates} from '../tileurlfunction.js';\nimport {createXYZ, extentFromProjection} from '../tilegrid.js';\nimport {get as getProjection, getTransformFromProjections} from '../proj.js';\nimport {jsonp as requestJSONP} from '../net.js';\n\n/**\n * @typedef {Object} Config\n * @property {string} [name] The name.\n * @property {string} [description] The description.\n * @property {string} [version] The version.\n * @property {string} [attribution] The attribution.\n * @property {string} [template] The template.\n * @property {string} [legend] The legend.\n * @property {string} [scheme] The scheme.\n * @property {Array} tiles The tile URL templates.\n * @property {Array} [grids] Optional grids.\n * @property {number} [minzoom] Minimum zoom level.\n * @property {number} [maxzoom] Maximum zoom level.\n * @property {Array} [bounds] Optional bounds.\n * @property {Array} [center] Optional center.\n */\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {number} [cacheSize] Initial tile cache size. Will auto-grow to hold at least the number of tiles in the viewport.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images. Note that\n * you must provide a `crossOrigin` value if you want to access pixel data with the Canvas renderer.\n * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling. By default,\n * linear interpolation is used when resampling. Set to false to use the nearest neighbor instead.\n * @property {boolean} [jsonp=false] Use JSONP with callback to load the TileJSON.\n * Useful when the server does not support CORS..\n * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {Config} [tileJSON] TileJSON configuration for this source.\n * If not provided, `url` must be configured.\n * @property {import(\"../Tile.js\").LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL. The default is\n * ```js\n * function(imageTile, src) {\n * imageTile.getImage().src = src;\n * };\n * ```\n * @property {number|import(\"../size.js\").Size} [tileSize=[256, 256]] The tile size used by the tile service.\n * Note: `tileSize` and other non-standard TileJSON properties are currently ignored.\n * @property {string} [url] URL to the TileJSON file. If not provided, `tileJSON` must be configured.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * @property {number} [transition] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0]\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n */\n\n/**\n * @classdesc\n * Layer source for tile data in TileJSON format.\n * @api\n */\nclass TileJSON extends TileImage {\n /**\n * @param {Options} options TileJSON options.\n */\n constructor(options) {\n super({\n attributions: options.attributions,\n cacheSize: options.cacheSize,\n crossOrigin: options.crossOrigin,\n interpolate: options.interpolate,\n projection: getProjection('EPSG:3857'),\n reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n state: 'loading',\n tileLoadFunction: options.tileLoadFunction,\n wrapX: options.wrapX !== undefined ? options.wrapX : true,\n transition: options.transition,\n zDirection: options.zDirection,\n });\n\n /**\n * @type {Config}\n * @private\n */\n this.tileJSON_ = null;\n\n /**\n * @type {number|import(\"../size.js\").Size}\n * @private\n */\n this.tileSize_ = options.tileSize;\n\n if (options.url) {\n if (options.jsonp) {\n requestJSONP(\n options.url,\n this.handleTileJSONResponse.bind(this),\n this.handleTileJSONError.bind(this)\n );\n } else {\n const client = new XMLHttpRequest();\n client.addEventListener('load', this.onXHRLoad_.bind(this));\n client.addEventListener('error', this.onXHRError_.bind(this));\n client.open('GET', options.url);\n client.send();\n }\n } else if (options.tileJSON) {\n this.handleTileJSONResponse(options.tileJSON);\n } else {\n assert(false, 51); // Either `url` or `tileJSON` options must be provided\n }\n }\n\n /**\n * @private\n * @param {Event} event The load event.\n */\n onXHRLoad_(event) {\n const client = /** @type {XMLHttpRequest} */ (event.target);\n // status will be 0 for file:// urls\n if (!client.status || (client.status >= 200 && client.status < 300)) {\n let response;\n try {\n response = /** @type {Config} */ (JSON.parse(client.responseText));\n } catch (err) {\n this.handleTileJSONError();\n return;\n }\n this.handleTileJSONResponse(response);\n } else {\n this.handleTileJSONError();\n }\n }\n\n /**\n * @private\n * @param {Event} event The error event.\n */\n onXHRError_(event) {\n this.handleTileJSONError();\n }\n\n /**\n * @return {Config} The tilejson object.\n * @api\n */\n getTileJSON() {\n return this.tileJSON_;\n }\n\n /**\n * @protected\n * @param {Config} tileJSON Tile JSON.\n */\n handleTileJSONResponse(tileJSON) {\n const epsg4326Projection = getProjection('EPSG:4326');\n\n const sourceProjection = this.getProjection();\n let extent;\n if (tileJSON['bounds'] !== undefined) {\n const transform = getTransformFromProjections(\n epsg4326Projection,\n sourceProjection\n );\n extent = applyTransform(tileJSON['bounds'], transform);\n }\n\n const gridExtent = extentFromProjection(sourceProjection);\n const minZoom = tileJSON['minzoom'] || 0;\n const maxZoom = tileJSON['maxzoom'] || 22;\n const tileGrid = createXYZ({\n extent: gridExtent,\n maxZoom: maxZoom,\n minZoom: minZoom,\n tileSize: this.tileSize_,\n });\n this.tileGrid = tileGrid;\n\n this.tileUrlFunction = createFromTemplates(tileJSON['tiles'], tileGrid);\n\n if (tileJSON['attribution'] && !this.getAttributions()) {\n const attributionExtent = extent !== undefined ? extent : gridExtent;\n this.setAttributions(function (frameState) {\n if (intersects(attributionExtent, frameState.extent)) {\n return [tileJSON['attribution']];\n }\n return null;\n });\n }\n this.tileJSON_ = tileJSON;\n this.setState('ready');\n }\n\n /**\n * @protected\n */\n handleTileJSONError() {\n this.setState('error');\n }\n}\n\nexport default TileJSON;\n","/**\n * @module ol/source/TileWMS\n */\n\nimport TileImage from './TileImage.js';\nimport {DEFAULT_VERSION} from './wms.js';\nimport {appendParams} from '../uri.js';\nimport {assert} from '../asserts.js';\nimport {buffer, createEmpty} from '../extent.js';\nimport {buffer as bufferSize, scale as scaleSize, toSize} from '../size.js';\nimport {calculateSourceResolution} from '../reproj.js';\nimport {compareVersions} from '../string.js';\nimport {get as getProjection, transform, transformExtent} from '../proj.js';\nimport {modulo} from '../math.js';\nimport {hash as tileCoordHash} from '../tilecoord.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {number} [cacheSize] Initial tile cache size. Will auto-grow to hold at least the number of tiles in the viewport.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images. Note that\n * you must provide a `crossOrigin` value if you want to access pixel data with the Canvas renderer.\n * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling. By default,\n * linear interpolation is used when resampling. Set to false to use the nearest neighbor instead.\n * @property {Object} params WMS request parameters.\n * At least a `LAYERS` param is required. `STYLES` is\n * `''` by default. `VERSION` is `1.3.0` by default. `WIDTH`, `HEIGHT`, `BBOX`\n * and `CRS` (`SRS` for WMS version < 1.3.0) will be set dynamically.\n * @property {number} [gutter=0]\n * The size in pixels of the gutter around image tiles to ignore. By setting\n * this property to a non-zero value, images will be requested that are wider\n * and taller than the tile size by a value of `2 x gutter`.\n * Using a non-zero value allows artifacts of rendering at tile edges to be\n * ignored. If you control the WMS service it is recommended to address\n * \"artifacts at tile edges\" issues by properly configuring the WMS service. For\n * example, MapServer has a `tile_map_edge_buffer` configuration parameter for\n * this. See https://mapserver.org/output/tile_mode.html.\n * @property {boolean} [hidpi=true] Use the `ol/Map#pixelRatio` value when requesting\n * the image from the remote server.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection. Default is the view projection.\n * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {typeof import(\"../ImageTile.js\").default} [tileClass] Class used to instantiate image tiles.\n * Default is {@link module:ol/ImageTile~ImageTile}.\n * @property {import(\"../tilegrid/TileGrid.js\").default} [tileGrid] Tile grid. Base this on the resolutions,\n * tilesize and extent supported by the server.\n * If this is not defined, a default grid will be used: if there is a projection\n * extent, the grid will be based on that; if not, a grid based on a global\n * extent with origin at 0,0 will be used.\n * @property {import(\"./wms.js\").ServerType} [serverType] The type of\n * the remote WMS server: `mapserver`, `geoserver`, `carmentaserver`, or `qgis`.\n * Only needed if `hidpi` is `true`.\n * @property {import(\"../Tile.js\").LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL. The default is\n * ```js\n * function(imageTile, src) {\n * imageTile.getImage().src = src;\n * };\n * ```\n * @property {string} [url] WMS service URL.\n * @property {Array} [urls] WMS service urls.\n * Use this instead of `url` when the WMS supports multiple urls for GetMap requests.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * When set to `false`, only one world\n * will be rendered. When `true`, tiles will be requested for one world only,\n * but they will be wrapped horizontally to render multiple worlds.\n * @property {number} [transition] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0]\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n */\n\n/**\n * @classdesc\n * Layer source for tile data from WMS servers.\n * @api\n */\nclass TileWMS extends TileImage {\n /**\n * @param {Options} [options] Tile WMS options.\n */\n constructor(options) {\n options = options ? options : /** @type {Options} */ ({});\n\n const params = Object.assign({}, options.params);\n\n const transparent = 'TRANSPARENT' in params ? params['TRANSPARENT'] : true;\n\n super({\n attributions: options.attributions,\n attributionsCollapsible: options.attributionsCollapsible,\n cacheSize: options.cacheSize,\n crossOrigin: options.crossOrigin,\n interpolate: options.interpolate,\n opaque: !transparent,\n projection: options.projection,\n reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n tileClass: options.tileClass,\n tileGrid: options.tileGrid,\n tileLoadFunction: options.tileLoadFunction,\n url: options.url,\n urls: options.urls,\n wrapX: options.wrapX !== undefined ? options.wrapX : true,\n transition: options.transition,\n zDirection: options.zDirection,\n });\n\n /**\n * @private\n * @type {number}\n */\n this.gutter_ = options.gutter !== undefined ? options.gutter : 0;\n\n /**\n * @private\n * @type {!Object}\n */\n this.params_ = params;\n\n /**\n * @private\n * @type {boolean}\n */\n this.v13_ = true;\n\n /**\n * @private\n * @type {import(\"./wms.js\").ServerType}\n */\n this.serverType_ = options.serverType;\n\n /**\n * @private\n * @type {boolean}\n */\n this.hidpi_ = options.hidpi !== undefined ? options.hidpi : true;\n\n /**\n * @private\n * @type {import(\"../extent.js\").Extent}\n */\n this.tmpExtent_ = createEmpty();\n\n this.updateV13_();\n this.setKey(this.getKeyForParams_());\n }\n\n /**\n * Return the GetFeatureInfo URL for the passed coordinate, resolution, and\n * projection. Return `undefined` if the GetFeatureInfo URL cannot be\n * constructed.\n * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {number} resolution Resolution.\n * @param {import(\"../proj.js\").ProjectionLike} projection Projection.\n * @param {!Object} params GetFeatureInfo params. `INFO_FORMAT` at least should\n * be provided. If `QUERY_LAYERS` is not provided then the layers specified\n * in the `LAYERS` parameter will be used. `VERSION` should not be\n * specified here.\n * @return {string|undefined} GetFeatureInfo URL.\n * @api\n */\n getFeatureInfoUrl(coordinate, resolution, projection, params) {\n const projectionObj = getProjection(projection);\n const sourceProjectionObj = this.getProjection();\n\n let tileGrid = this.getTileGrid();\n if (!tileGrid) {\n tileGrid = this.getTileGridForProjection(projectionObj);\n }\n\n const z = tileGrid.getZForResolution(resolution, this.zDirection);\n const tileCoord = tileGrid.getTileCoordForCoordAndZ(coordinate, z);\n\n if (tileGrid.getResolutions().length <= tileCoord[0]) {\n return undefined;\n }\n\n let tileResolution = tileGrid.getResolution(tileCoord[0]);\n let tileExtent = tileGrid.getTileCoordExtent(tileCoord, this.tmpExtent_);\n let tileSize = toSize(tileGrid.getTileSize(tileCoord[0]), this.tmpSize);\n\n const gutter = this.gutter_;\n if (gutter !== 0) {\n tileSize = bufferSize(tileSize, gutter, this.tmpSize);\n tileExtent = buffer(tileExtent, tileResolution * gutter, tileExtent);\n }\n\n if (sourceProjectionObj && sourceProjectionObj !== projectionObj) {\n tileResolution = calculateSourceResolution(\n sourceProjectionObj,\n projectionObj,\n coordinate,\n tileResolution\n );\n tileExtent = transformExtent(\n tileExtent,\n projectionObj,\n sourceProjectionObj\n );\n coordinate = transform(coordinate, projectionObj, sourceProjectionObj);\n }\n\n const baseParams = {\n 'SERVICE': 'WMS',\n 'VERSION': DEFAULT_VERSION,\n 'REQUEST': 'GetFeatureInfo',\n 'FORMAT': 'image/png',\n 'TRANSPARENT': true,\n 'QUERY_LAYERS': this.params_['LAYERS'],\n };\n Object.assign(baseParams, this.params_, params);\n\n const x = Math.floor((coordinate[0] - tileExtent[0]) / tileResolution);\n const y = Math.floor((tileExtent[3] - coordinate[1]) / tileResolution);\n\n baseParams[this.v13_ ? 'I' : 'X'] = x;\n baseParams[this.v13_ ? 'J' : 'Y'] = y;\n\n return this.getRequestUrl_(\n tileCoord,\n tileSize,\n tileExtent,\n 1,\n sourceProjectionObj || projectionObj,\n baseParams\n );\n }\n\n /**\n * Return the GetLegendGraphic URL, optionally optimized for the passed\n * resolution and possibly including any passed specific parameters. Returns\n * `undefined` if the GetLegendGraphic URL cannot be constructed.\n *\n * @param {number} [resolution] Resolution. If set to undefined, `SCALE`\n * will not be calculated and included in URL.\n * @param {Object} [params] GetLegendGraphic params. If `LAYER` is set, the\n * request is generated for this wms layer, else it will try to use the\n * configured wms layer. Default `FORMAT` is `image/png`.\n * `VERSION` should not be specified here.\n * @return {string|undefined} GetLegendGraphic URL.\n * @api\n */\n getLegendUrl(resolution, params) {\n if (this.urls[0] === undefined) {\n return undefined;\n }\n\n const baseParams = {\n 'SERVICE': 'WMS',\n 'VERSION': DEFAULT_VERSION,\n 'REQUEST': 'GetLegendGraphic',\n 'FORMAT': 'image/png',\n };\n\n if (params === undefined || params['LAYER'] === undefined) {\n const layers = this.params_.LAYERS;\n const isSingleLayer = !Array.isArray(layers) || layers.length === 1;\n if (!isSingleLayer) {\n return undefined;\n }\n baseParams['LAYER'] = layers;\n }\n\n if (resolution !== undefined) {\n const mpu = this.getProjection()\n ? this.getProjection().getMetersPerUnit()\n : 1;\n const pixelSize = 0.00028;\n baseParams['SCALE'] = (resolution * mpu) / pixelSize;\n }\n\n Object.assign(baseParams, params);\n\n return appendParams(/** @type {string} */ (this.urls[0]), baseParams);\n }\n\n /**\n * @return {number} Gutter.\n */\n getGutter() {\n return this.gutter_;\n }\n\n /**\n * Get the user-provided params, i.e. those passed to the constructor through\n * the \"params\" option, and possibly updated using the updateParams method.\n * @return {Object} Params.\n * @api\n */\n getParams() {\n return this.params_;\n }\n\n /**\n * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {import(\"../size.js\").Size} tileSize Tile size.\n * @param {import(\"../extent.js\").Extent} tileExtent Tile extent.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @param {Object} params Params.\n * @return {string|undefined} Request URL.\n * @private\n */\n getRequestUrl_(\n tileCoord,\n tileSize,\n tileExtent,\n pixelRatio,\n projection,\n params\n ) {\n const urls = this.urls;\n if (!urls) {\n return undefined;\n }\n\n params['WIDTH'] = tileSize[0];\n params['HEIGHT'] = tileSize[1];\n\n params[this.v13_ ? 'CRS' : 'SRS'] = projection.getCode();\n\n if (!('STYLES' in this.params_)) {\n params['STYLES'] = '';\n }\n\n if (pixelRatio != 1) {\n switch (this.serverType_) {\n case 'geoserver':\n const dpi = (90 * pixelRatio + 0.5) | 0;\n if ('FORMAT_OPTIONS' in params) {\n params['FORMAT_OPTIONS'] += ';dpi:' + dpi;\n } else {\n params['FORMAT_OPTIONS'] = 'dpi:' + dpi;\n }\n break;\n case 'mapserver':\n params['MAP_RESOLUTION'] = 90 * pixelRatio;\n break;\n case 'carmentaserver':\n case 'qgis':\n params['DPI'] = 90 * pixelRatio;\n break;\n default: // Unknown `serverType` configured\n assert(false, 52);\n break;\n }\n }\n\n const axisOrientation = projection.getAxisOrientation();\n const bbox = tileExtent;\n if (this.v13_ && axisOrientation.substr(0, 2) == 'ne') {\n let tmp;\n tmp = tileExtent[0];\n bbox[0] = tileExtent[1];\n bbox[1] = tmp;\n tmp = tileExtent[2];\n bbox[2] = tileExtent[3];\n bbox[3] = tmp;\n }\n params['BBOX'] = bbox.join(',');\n\n let url;\n if (urls.length == 1) {\n url = urls[0];\n } else {\n const index = modulo(tileCoordHash(tileCoord), urls.length);\n url = urls[index];\n }\n return appendParams(url, params);\n }\n\n /**\n * Get the tile pixel ratio for this source.\n * @param {number} pixelRatio Pixel ratio.\n * @return {number} Tile pixel ratio.\n */\n getTilePixelRatio(pixelRatio) {\n return !this.hidpi_ || this.serverType_ === undefined ? 1 : pixelRatio;\n }\n\n /**\n * @private\n * @return {string} The key for the current params.\n */\n getKeyForParams_() {\n let i = 0;\n const res = [];\n for (const key in this.params_) {\n res[i++] = key + '-' + this.params_[key];\n }\n return res.join('/');\n }\n\n /**\n * Update the user-provided params.\n * @param {Object} params Params.\n * @api\n */\n updateParams(params) {\n Object.assign(this.params_, params);\n this.updateV13_();\n this.setKey(this.getKeyForParams_());\n }\n\n /**\n * @private\n */\n updateV13_() {\n const version = this.params_['VERSION'] || DEFAULT_VERSION;\n this.v13_ = compareVersions(version, '1.3') >= 0;\n }\n\n /**\n * @param {import(\"../tilecoord.js\").TileCoord} tileCoord The tile coordinate\n * @param {number} pixelRatio The pixel ratio\n * @param {import(\"../proj/Projection.js\").default} projection The projection\n * @return {string|undefined} The tile URL\n * @override\n */\n tileUrlFunction(tileCoord, pixelRatio, projection) {\n let tileGrid = this.getTileGrid();\n if (!tileGrid) {\n tileGrid = this.getTileGridForProjection(projection);\n }\n\n if (tileGrid.getResolutions().length <= tileCoord[0]) {\n return undefined;\n }\n\n if (pixelRatio != 1 && (!this.hidpi_ || this.serverType_ === undefined)) {\n pixelRatio = 1;\n }\n\n const tileResolution = tileGrid.getResolution(tileCoord[0]);\n let tileExtent = tileGrid.getTileCoordExtent(tileCoord, this.tmpExtent_);\n let tileSize = toSize(tileGrid.getTileSize(tileCoord[0]), this.tmpSize);\n\n const gutter = this.gutter_;\n if (gutter !== 0) {\n tileSize = bufferSize(tileSize, gutter, this.tmpSize);\n tileExtent = buffer(tileExtent, tileResolution * gutter, tileExtent);\n }\n\n if (pixelRatio != 1) {\n tileSize = scaleSize(tileSize, pixelRatio, this.tmpSize);\n }\n\n const baseParams = {\n 'SERVICE': 'WMS',\n 'VERSION': DEFAULT_VERSION,\n 'REQUEST': 'GetMap',\n 'FORMAT': 'image/png',\n 'TRANSPARENT': true,\n };\n Object.assign(baseParams, this.params_);\n\n return this.getRequestUrl_(\n tileCoord,\n tileSize,\n tileExtent,\n pixelRatio,\n projection,\n baseParams\n );\n }\n}\n\nexport default TileWMS;\n","/**\n * @module ol/source/UTFGrid\n */\n\nimport EventType from '../events/EventType.js';\nimport Tile from '../Tile.js';\nimport TileSource from './Tile.js';\nimport TileState from '../TileState.js';\nimport {applyTransform, intersects} from '../extent.js';\nimport {assert} from '../asserts.js';\nimport {createFromTemplates, nullTileUrlFunction} from '../tileurlfunction.js';\nimport {createXYZ, extentFromProjection} from '../tilegrid.js';\nimport {getKeyZXY} from '../tilecoord.js';\nimport {get as getProjection, getTransformFromProjections} from '../proj.js';\nimport {listenOnce} from '../events.js';\nimport {jsonp as requestJSONP} from '../net.js';\n\n/**\n * @typedef {Object} UTFGridJSON\n * @property {Array} grid The grid.\n * @property {Array} keys The keys.\n * @property {Object} [data] Optional data.\n */\n\nexport class CustomTile extends Tile {\n /**\n * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {import(\"../TileState.js\").default} state State.\n * @param {string} src Image source URI.\n * @param {import(\"../extent.js\").Extent} extent Extent of the tile.\n * @param {boolean} preemptive Load the tile when visible (before it's needed).\n * @param {boolean} jsonp Load the tile as a script.\n */\n constructor(tileCoord, state, src, extent, preemptive, jsonp) {\n super(tileCoord, state);\n\n /**\n * @private\n * @type {string}\n */\n this.src_ = src;\n\n /**\n * @private\n * @type {import(\"../extent.js\").Extent}\n */\n this.extent_ = extent;\n\n /**\n * @private\n * @type {boolean}\n */\n this.preemptive_ = preemptive;\n\n /**\n * @private\n * @type {Array}\n */\n this.grid_ = null;\n\n /**\n * @private\n * @type {Array}\n */\n this.keys_ = null;\n\n /**\n * @private\n * @type {Object|undefined}\n */\n this.data_ = null;\n\n /**\n * @private\n * @type {boolean}\n */\n this.jsonp_ = jsonp;\n }\n\n /**\n * Get the image element for this tile.\n * @return {HTMLImageElement} Image.\n */\n getImage() {\n return null;\n }\n\n /**\n * Synchronously returns data at given coordinate (if available).\n * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n * @return {*} The data.\n */\n getData(coordinate) {\n if (!this.grid_ || !this.keys_) {\n return null;\n }\n const xRelative =\n (coordinate[0] - this.extent_[0]) / (this.extent_[2] - this.extent_[0]);\n const yRelative =\n (coordinate[1] - this.extent_[1]) / (this.extent_[3] - this.extent_[1]);\n\n const row = this.grid_[Math.floor((1 - yRelative) * this.grid_.length)];\n\n if (typeof row !== 'string') {\n return null;\n }\n\n let code = row.charCodeAt(Math.floor(xRelative * row.length));\n if (code >= 93) {\n code--;\n }\n if (code >= 35) {\n code--;\n }\n code -= 32;\n\n let data = null;\n if (code in this.keys_) {\n const id = this.keys_[code];\n if (this.data_ && id in this.data_) {\n data = this.data_[id];\n } else {\n data = id;\n }\n }\n return data;\n }\n\n /**\n * Calls the callback (synchronously by default) with the available data\n * for given coordinate (or `null` if not yet loaded).\n * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {function(*): void} callback Callback.\n * @param {boolean} [request] If `true` the callback is always async.\n * The tile data is requested if not yet loaded.\n */\n forDataAtCoordinate(coordinate, callback, request) {\n if (this.state == TileState.EMPTY && request === true) {\n this.state = TileState.IDLE;\n listenOnce(\n this,\n EventType.CHANGE,\n function (e) {\n callback(this.getData(coordinate));\n },\n this\n );\n this.loadInternal_();\n } else {\n if (request === true) {\n setTimeout(() => {\n callback(this.getData(coordinate));\n }, 0);\n } else {\n callback(this.getData(coordinate));\n }\n }\n }\n\n /**\n * Return the key to be used for all tiles in the source.\n * @return {string} The key for all tiles.\n */\n getKey() {\n return this.src_;\n }\n\n /**\n * @private\n */\n handleError_() {\n this.state = TileState.ERROR;\n this.changed();\n }\n\n /**\n * @param {!UTFGridJSON} json UTFGrid data.\n * @private\n */\n handleLoad_(json) {\n this.grid_ = json['grid'];\n this.keys_ = json['keys'];\n this.data_ = json['data'];\n\n this.state = TileState.LOADED;\n this.changed();\n }\n\n /**\n * @private\n */\n loadInternal_() {\n if (this.state == TileState.IDLE) {\n this.state = TileState.LOADING;\n if (this.jsonp_) {\n requestJSONP(\n this.src_,\n this.handleLoad_.bind(this),\n this.handleError_.bind(this)\n );\n } else {\n const client = new XMLHttpRequest();\n client.addEventListener('load', this.onXHRLoad_.bind(this));\n client.addEventListener('error', this.onXHRError_.bind(this));\n client.open('GET', this.src_);\n client.send();\n }\n }\n }\n\n /**\n * @private\n * @param {Event} event The load event.\n */\n onXHRLoad_(event) {\n const client = /** @type {XMLHttpRequest} */ (event.target);\n // status will be 0 for file:// urls\n if (!client.status || (client.status >= 200 && client.status < 300)) {\n let response;\n try {\n response = /** @type {!UTFGridJSON} */ (\n JSON.parse(client.responseText)\n );\n } catch (err) {\n this.handleError_();\n return;\n }\n this.handleLoad_(response);\n } else {\n this.handleError_();\n }\n }\n\n /**\n * @private\n * @param {Event} event The error event.\n */\n onXHRError_(event) {\n this.handleError_();\n }\n\n /**\n */\n load() {\n if (this.preemptive_) {\n this.loadInternal_();\n } else {\n this.setState(TileState.EMPTY);\n }\n }\n}\n\n/**\n * @typedef {Object} Options\n * @property {boolean} [preemptive=true]\n * If `true` the UTFGrid source loads the tiles based on their \"visibility\".\n * This improves the speed of response, but increases traffic.\n * Note that if set to `false` (lazy loading), you need to pass `true` as\n * `request` to the `forDataAtCoordinateAndResolution` method otherwise no\n * data will ever be loaded.\n * @property {boolean} [jsonp=false] Use JSONP with callback to load the TileJSON.\n * Useful when the server does not support CORS..\n * @property {import(\"./TileJSON.js\").Config} [tileJSON] TileJSON configuration for this source.\n * If not provided, `url` must be configured.\n * @property {string} [url] TileJSON endpoint that provides the configuration for this source.\n * Request will be made through JSONP. If not provided, `tileJSON` must be configured.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0]\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n */\n\n/**\n * @classdesc\n * Layer source for UTFGrid interaction data loaded from TileJSON format.\n * @api\n */\nclass UTFGrid extends TileSource {\n /**\n * @param {Options} options Source options.\n */\n constructor(options) {\n super({\n projection: getProjection('EPSG:3857'),\n state: 'loading',\n zDirection: options.zDirection,\n });\n\n /**\n * @private\n * @type {boolean}\n */\n this.preemptive_ =\n options.preemptive !== undefined ? options.preemptive : true;\n\n /**\n * @private\n * @type {!import(\"../Tile.js\").UrlFunction}\n */\n this.tileUrlFunction_ = nullTileUrlFunction;\n\n /**\n * @private\n * @type {string|undefined}\n */\n this.template_ = undefined;\n\n /**\n * @private\n * @type {boolean}\n */\n this.jsonp_ = options.jsonp || false;\n\n if (options.url) {\n if (this.jsonp_) {\n requestJSONP(\n options.url,\n this.handleTileJSONResponse.bind(this),\n this.handleTileJSONError.bind(this)\n );\n } else {\n const client = new XMLHttpRequest();\n client.addEventListener('load', this.onXHRLoad_.bind(this));\n client.addEventListener('error', this.onXHRError_.bind(this));\n client.open('GET', options.url);\n client.send();\n }\n } else if (options.tileJSON) {\n this.handleTileJSONResponse(options.tileJSON);\n } else {\n assert(false, 51); // Either `url` or `tileJSON` options must be provided\n }\n }\n\n /**\n * @private\n * @param {Event} event The load event.\n */\n onXHRLoad_(event) {\n const client = /** @type {XMLHttpRequest} */ (event.target);\n // status will be 0 for file:// urls\n if (!client.status || (client.status >= 200 && client.status < 300)) {\n let response;\n try {\n response = /** @type {import(\"./TileJSON.js\").Config} */ (\n JSON.parse(client.responseText)\n );\n } catch (err) {\n this.handleTileJSONError();\n return;\n }\n this.handleTileJSONResponse(response);\n } else {\n this.handleTileJSONError();\n }\n }\n\n /**\n * @private\n * @param {Event} event The error event.\n */\n onXHRError_(event) {\n this.handleTileJSONError();\n }\n\n /**\n * Return the template from TileJSON.\n * @return {string|undefined} The template from TileJSON.\n * @api\n */\n getTemplate() {\n return this.template_;\n }\n\n /**\n * Calls the callback (synchronously by default) with the available data\n * for given coordinate and resolution (or `null` if not yet loaded or\n * in case of an error).\n * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {number} resolution Resolution.\n * @param {function(*): void} callback Callback.\n * @param {boolean} [request] If `true` the callback is always async.\n * The tile data is requested if not yet loaded.\n * @api\n */\n forDataAtCoordinateAndResolution(coordinate, resolution, callback, request) {\n if (this.tileGrid) {\n const z = this.tileGrid.getZForResolution(resolution, this.zDirection);\n const tileCoord = this.tileGrid.getTileCoordForCoordAndZ(coordinate, z);\n const tile = /** @type {!CustomTile} */ (\n this.getTile(\n tileCoord[0],\n tileCoord[1],\n tileCoord[2],\n 1,\n this.getProjection()\n )\n );\n tile.forDataAtCoordinate(coordinate, callback, request);\n } else {\n if (request === true) {\n setTimeout(function () {\n callback(null);\n }, 0);\n } else {\n callback(null);\n }\n }\n }\n\n /**\n * @protected\n */\n handleTileJSONError() {\n this.setState('error');\n }\n\n /**\n * TODO: very similar to ol/source/TileJSON#handleTileJSONResponse\n * @protected\n * @param {import(\"./TileJSON.js\").Config} tileJSON Tile JSON.\n */\n handleTileJSONResponse(tileJSON) {\n const epsg4326Projection = getProjection('EPSG:4326');\n\n const sourceProjection = this.getProjection();\n let extent;\n if (tileJSON['bounds'] !== undefined) {\n const transform = getTransformFromProjections(\n epsg4326Projection,\n sourceProjection\n );\n extent = applyTransform(tileJSON['bounds'], transform);\n }\n\n const gridExtent = extentFromProjection(sourceProjection);\n const minZoom = tileJSON['minzoom'] || 0;\n const maxZoom = tileJSON['maxzoom'] || 22;\n const tileGrid = createXYZ({\n extent: gridExtent,\n maxZoom: maxZoom,\n minZoom: minZoom,\n });\n this.tileGrid = tileGrid;\n\n this.template_ = tileJSON['template'];\n\n const grids = tileJSON['grids'];\n if (!grids) {\n this.setState('error');\n return;\n }\n\n this.tileUrlFunction_ = createFromTemplates(grids, tileGrid);\n\n if (tileJSON['attribution'] !== undefined) {\n const attributionExtent = extent !== undefined ? extent : gridExtent;\n this.setAttributions(function (frameState) {\n if (intersects(attributionExtent, frameState.extent)) {\n return [tileJSON['attribution']];\n }\n return null;\n });\n }\n\n this.setState('ready');\n }\n\n /**\n * @param {number} z Tile coordinate z.\n * @param {number} x Tile coordinate x.\n * @param {number} y Tile coordinate y.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {!CustomTile} Tile.\n */\n getTile(z, x, y, pixelRatio, projection) {\n const tileCoordKey = getKeyZXY(z, x, y);\n if (this.tileCache.containsKey(tileCoordKey)) {\n return this.tileCache.get(tileCoordKey);\n }\n const tileCoord = [z, x, y];\n const urlTileCoord = this.getTileCoordForTileUrlFunction(\n tileCoord,\n projection\n );\n const tileUrl = this.tileUrlFunction_(urlTileCoord, pixelRatio, projection);\n const tile = new CustomTile(\n tileCoord,\n tileUrl !== undefined ? TileState.IDLE : TileState.EMPTY,\n tileUrl !== undefined ? tileUrl : '',\n this.tileGrid.getTileCoordExtent(tileCoord),\n this.preemptive_,\n this.jsonp_\n );\n this.tileCache.set(tileCoordKey, tile);\n return tile;\n }\n\n /**\n * Marks a tile coord as being used, without triggering a load.\n * @param {number} z Tile coordinate z.\n * @param {number} x Tile coordinate x.\n * @param {number} y Tile coordinate y.\n */\n useTile(z, x, y) {\n const tileCoordKey = getKeyZXY(z, x, y);\n if (this.tileCache.containsKey(tileCoordKey)) {\n this.tileCache.get(tileCoordKey);\n }\n }\n}\n\nexport default UTFGrid;\n","/**\n * @module ol/source/VectorTile\n */\n\nimport EventType from '../events/EventType.js';\nimport Tile from '../VectorTile.js';\nimport TileCache from '../TileCache.js';\nimport TileGrid from '../tilegrid/TileGrid.js';\nimport TileState from '../TileState.js';\nimport UrlTile from './UrlTile.js';\nimport VectorRenderTile from '../VectorRenderTile.js';\nimport {DEFAULT_MAX_ZOOM} from '../tilegrid/common.js';\nimport {\n buffer as bufferExtent,\n getIntersection,\n intersects,\n} from '../extent.js';\nimport {createXYZ, extentFromProjection} from '../tilegrid.js';\nimport {fromKey, getCacheKeyForTileKey, getKeyZXY} from '../tilecoord.js';\nimport {isEmpty} from '../obj.js';\nimport {loadFeaturesXhr} from '../featureloader.js';\nimport {toSize} from '../size.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {number} [cacheSize] Initial tile cache size. Will auto-grow to hold at least twice the number of tiles in the viewport.\n * @property {import(\"../extent.js\").Extent} [extent] Extent.\n * @property {import(\"../format/Feature.js\").default} [format] Feature format for tiles. Used and required by the default.\n * @property {boolean} [overlaps=true] This source may have overlapping geometries. Setting this\n * to `false` (e.g. for sources with polygons that represent administrative\n * boundaries or TopoJSON sources) allows the renderer to optimise fill and\n * stroke operations.\n * @property {import(\"../proj.js\").ProjectionLike} [projection='EPSG:3857'] Projection of the tile grid.\n * @property {import(\"./Source.js\").State} [state] Source state.\n * @property {typeof import(\"../VectorTile.js\").default} [tileClass] Class used to instantiate image tiles.\n * Default is {@link module:ol/VectorTile~VectorTile}.\n * @property {number} [maxZoom=22] Optional max zoom level. Not used if `tileGrid` is provided.\n * @property {number} [minZoom] Optional min zoom level. Not used if `tileGrid` is provided.\n * @property {number|import(\"../size.js\").Size} [tileSize=512] Optional tile size. Not used if `tileGrid` is provided.\n * @property {number} [maxResolution] Optional tile grid resolution at level zero. Not used if `tileGrid` is provided.\n * @property {import(\"../tilegrid/TileGrid.js\").default} [tileGrid] Tile grid.\n * @property {import(\"../Tile.js\").LoadFunction} [tileLoadFunction]\n * Optional function to load a tile given a URL. Could look like this for pbf tiles:\n * ```js\n * function(tile, url) {\n * tile.setLoader(function(extent, resolution, projection) {\n * fetch(url).then(function(response) {\n * response.arrayBuffer().then(function(data) {\n * const format = tile.getFormat() // ol/format/MVT configured as source format\n * const features = format.readFeatures(data, {\n * extent: extent,\n * featureProjection: projection\n * });\n * tile.setFeatures(features);\n * });\n * });\n * });\n * }\n * ```\n * If you do not need extent, resolution and projection to get the features for a tile (e.g.\n * for GeoJSON tiles), your `tileLoadFunction` does not need a `setLoader()` call. Only make sure\n * to call `setFeatures()` on the tile:\n * ```js\n * const format = new GeoJSON({featureProjection: map.getView().getProjection()});\n * async function tileLoadFunction(tile, url) {\n * const response = await fetch(url);\n * const data = await response.json();\n * tile.setFeatures(format.readFeatures(data));\n * }\n * ```\n * @property {import(\"../Tile.js\").UrlFunction} [tileUrlFunction] Optional function to get tile URL given a tile coordinate and the projection.\n * @property {string} [url] URL template. Must include `{x}`, `{y}` or `{-y}`, and `{z}` placeholders.\n * A `{?-?}` template pattern, for example `subdomain{a-f}.domain.com`, may be\n * used instead of defining each one separately in the `urls` option.\n * @property {number} [transition] A duration for tile opacity\n * transitions in milliseconds. A duration of 0 disables the opacity transition.\n * @property {Array} [urls] An array of URL templates.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * When set to `false`, only one world\n * will be rendered. When set to `true`, tiles will be wrapped horizontally to\n * render multiple worlds.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=1]\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n */\n\n/**\n * @classdesc\n * Class for layer sources providing vector data divided into a tile grid, to be\n * used with {@link module:ol/layer/VectorTile~VectorTileLayer}. Although this source receives tiles\n * with vector features from the server, it is not meant for feature editing.\n * Features are optimized for rendering, their geometries are clipped at or near\n * tile boundaries and simplified for a view resolution. See\n * {@link module:ol/source/Vector~VectorSource} for vector sources that are suitable for feature\n * editing.\n *\n * @fires import(\"./Tile.js\").TileSourceEvent\n * @api\n */\nclass VectorTile extends UrlTile {\n /**\n * @param {!Options} options Vector tile options.\n */\n constructor(options) {\n const projection = options.projection || 'EPSG:3857';\n\n const extent = options.extent || extentFromProjection(projection);\n\n const tileGrid =\n options.tileGrid ||\n createXYZ({\n extent: extent,\n maxResolution: options.maxResolution,\n maxZoom: options.maxZoom !== undefined ? options.maxZoom : 22,\n minZoom: options.minZoom,\n tileSize: options.tileSize || 512,\n });\n\n super({\n attributions: options.attributions,\n attributionsCollapsible: options.attributionsCollapsible,\n cacheSize: options.cacheSize,\n interpolate: true,\n opaque: false,\n projection: projection,\n state: options.state,\n tileGrid: tileGrid,\n tileLoadFunction: options.tileLoadFunction\n ? options.tileLoadFunction\n : defaultLoadFunction,\n tileUrlFunction: options.tileUrlFunction,\n url: options.url,\n urls: options.urls,\n wrapX: options.wrapX === undefined ? true : options.wrapX,\n transition: options.transition,\n zDirection: options.zDirection === undefined ? 1 : options.zDirection,\n });\n\n /**\n * @private\n * @type {import(\"../format/Feature.js\").default|null}\n */\n this.format_ = options.format ? options.format : null;\n\n /**\n * @private\n * @type {TileCache}\n */\n this.sourceTileCache = new TileCache(this.tileCache.highWaterMark);\n\n /**\n * @private\n * @type {boolean}\n */\n this.overlaps_ = options.overlaps == undefined ? true : options.overlaps;\n\n /**\n * @protected\n * @type {typeof import(\"../VectorTile.js\").default}\n */\n this.tileClass = options.tileClass ? options.tileClass : Tile;\n\n /**\n * @private\n * @type {Object}\n */\n this.tileGrids_ = {};\n }\n\n /**\n * Get features whose bounding box intersects the provided extent. Only features for cached\n * tiles for the last rendered zoom level are available in the source. So this method is only\n * suitable for requesting tiles for extents that are currently rendered.\n *\n * Features are returned in random tile order and as they are included in the tiles. This means\n * they can be clipped, duplicated across tiles, and simplified to the render resolution.\n *\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @return {Array} Features.\n * @api\n */\n getFeaturesInExtent(extent) {\n const features = [];\n const tileCache = this.tileCache;\n if (tileCache.getCount() === 0) {\n return features;\n }\n const z = fromKey(tileCache.peekFirstKey())[0];\n const tileGrid = this.tileGrid;\n tileCache.forEach(function (tile) {\n if (tile.tileCoord[0] !== z || tile.getState() !== TileState.LOADED) {\n return;\n }\n const sourceTiles = tile.getSourceTiles();\n for (let i = 0, ii = sourceTiles.length; i < ii; ++i) {\n const sourceTile = sourceTiles[i];\n const tileCoord = sourceTile.tileCoord;\n if (intersects(extent, tileGrid.getTileCoordExtent(tileCoord))) {\n const tileFeatures = sourceTile.getFeatures();\n if (tileFeatures) {\n for (let j = 0, jj = tileFeatures.length; j < jj; ++j) {\n const candidate = tileFeatures[j];\n const geometry = candidate.getGeometry();\n if (intersects(extent, geometry.getExtent())) {\n features.push(candidate);\n }\n }\n }\n }\n }\n });\n return features;\n }\n\n /**\n * @return {boolean} The source can have overlapping geometries.\n */\n getOverlaps() {\n return this.overlaps_;\n }\n\n /**\n * clear {@link module:ol/TileCache~TileCache} and delete all source tiles\n * @api\n */\n clear() {\n this.tileCache.clear();\n this.sourceTileCache.clear();\n }\n\n /**\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @param {!Object} usedTiles Used tiles.\n */\n expireCache(projection, usedTiles) {\n const tileCache = this.getTileCacheForProjection(projection);\n const usedSourceTiles = Object.keys(usedTiles).reduce((acc, key) => {\n const cacheKey = getCacheKeyForTileKey(key);\n const tile = tileCache.peek(cacheKey);\n if (tile) {\n const sourceTiles = tile.sourceTiles;\n for (let i = 0, ii = sourceTiles.length; i < ii; ++i) {\n acc[sourceTiles[i].getKey()] = true;\n }\n }\n return acc;\n }, {});\n super.expireCache(projection, usedTiles);\n this.sourceTileCache.expireCache(usedSourceTiles);\n }\n\n /**\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"../proj/Projection\").default} projection Projection.\n * @param {VectorRenderTile} tile Vector image tile.\n * @return {Array} Tile keys.\n */\n getSourceTiles(pixelRatio, projection, tile) {\n if (tile.getState() === TileState.IDLE) {\n tile.setState(TileState.LOADING);\n const urlTileCoord = tile.wrappedTileCoord;\n const tileGrid = this.getTileGridForProjection(projection);\n const extent = tileGrid.getTileCoordExtent(urlTileCoord);\n const z = urlTileCoord[0];\n const resolution = tileGrid.getResolution(z);\n // make extent 1 pixel smaller so we don't load tiles for < 0.5 pixel render space\n bufferExtent(extent, -resolution, extent);\n const sourceTileGrid = this.tileGrid;\n const sourceExtent = sourceTileGrid.getExtent();\n if (sourceExtent) {\n getIntersection(extent, sourceExtent, extent);\n }\n const sourceZ = sourceTileGrid.getZForResolution(\n resolution,\n this.zDirection\n );\n\n sourceTileGrid.forEachTileCoord(extent, sourceZ, (sourceTileCoord) => {\n const tileUrl = this.tileUrlFunction(\n sourceTileCoord,\n pixelRatio,\n projection\n );\n const sourceTile = this.sourceTileCache.containsKey(tileUrl)\n ? this.sourceTileCache.get(tileUrl)\n : new this.tileClass(\n sourceTileCoord,\n tileUrl ? TileState.IDLE : TileState.EMPTY,\n tileUrl,\n this.format_,\n this.tileLoadFunction\n );\n tile.sourceTiles.push(sourceTile);\n const sourceTileState = sourceTile.getState();\n if (sourceTileState < TileState.LOADED) {\n const listenChange = (event) => {\n this.handleTileChange(event);\n const state = sourceTile.getState();\n if (state === TileState.LOADED || state === TileState.ERROR) {\n const sourceTileKey = sourceTile.getKey();\n if (sourceTileKey in tile.errorTileKeys) {\n if (sourceTile.getState() === TileState.LOADED) {\n delete tile.errorTileKeys[sourceTileKey];\n }\n } else {\n tile.loadingSourceTiles--;\n }\n if (state === TileState.ERROR) {\n tile.errorTileKeys[sourceTileKey] = true;\n } else {\n sourceTile.removeEventListener(EventType.CHANGE, listenChange);\n }\n if (tile.loadingSourceTiles === 0) {\n tile.setState(\n isEmpty(tile.errorTileKeys)\n ? TileState.LOADED\n : TileState.ERROR\n );\n }\n }\n };\n sourceTile.addEventListener(EventType.CHANGE, listenChange);\n tile.loadingSourceTiles++;\n }\n if (sourceTileState === TileState.IDLE) {\n sourceTile.extent =\n sourceTileGrid.getTileCoordExtent(sourceTileCoord);\n sourceTile.projection = projection;\n sourceTile.resolution = sourceTileGrid.getResolution(\n sourceTileCoord[0]\n );\n this.sourceTileCache.set(tileUrl, sourceTile);\n sourceTile.load();\n }\n });\n if (!tile.loadingSourceTiles) {\n tile.setState(\n tile.sourceTiles.some(\n (sourceTile) => sourceTile.getState() === TileState.ERROR\n )\n ? TileState.ERROR\n : TileState.LOADED\n );\n }\n }\n\n return tile.sourceTiles;\n }\n\n /**\n * @param {number} z Tile coordinate z.\n * @param {number} x Tile coordinate x.\n * @param {number} y Tile coordinate y.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {!VectorRenderTile} Tile.\n */\n getTile(z, x, y, pixelRatio, projection) {\n const coordKey = getKeyZXY(z, x, y);\n const key = this.getKey();\n let tile;\n if (this.tileCache.containsKey(coordKey)) {\n tile = this.tileCache.get(coordKey);\n if (tile.key === key) {\n return tile;\n }\n }\n const tileCoord = [z, x, y];\n let urlTileCoord = this.getTileCoordForTileUrlFunction(\n tileCoord,\n projection\n );\n const sourceExtent = this.getTileGrid().getExtent();\n const tileGrid = this.getTileGridForProjection(projection);\n if (urlTileCoord && sourceExtent) {\n const tileExtent = tileGrid.getTileCoordExtent(urlTileCoord);\n // make extent 1 pixel smaller so we don't load tiles for < 0.5 pixel render space\n bufferExtent(tileExtent, -tileGrid.getResolution(z), tileExtent);\n if (!intersects(sourceExtent, tileExtent)) {\n urlTileCoord = null;\n }\n }\n let empty = true;\n if (urlTileCoord !== null) {\n const sourceTileGrid = this.tileGrid;\n const resolution = tileGrid.getResolution(z);\n const sourceZ = sourceTileGrid.getZForResolution(resolution, 1);\n // make extent 1 pixel smaller so we don't load tiles for < 0.5 pixel render space\n const extent = tileGrid.getTileCoordExtent(urlTileCoord);\n bufferExtent(extent, -resolution, extent);\n sourceTileGrid.forEachTileCoord(extent, sourceZ, (sourceTileCoord) => {\n empty =\n empty &&\n !this.tileUrlFunction(sourceTileCoord, pixelRatio, projection);\n });\n }\n const newTile = new VectorRenderTile(\n tileCoord,\n empty ? TileState.EMPTY : TileState.IDLE,\n urlTileCoord,\n this.getSourceTiles.bind(this, pixelRatio, projection)\n );\n\n newTile.key = key;\n if (tile) {\n newTile.interimTile = tile;\n newTile.refreshInterimChain();\n this.tileCache.replace(coordKey, newTile);\n } else {\n this.tileCache.set(coordKey, newTile);\n }\n return newTile;\n }\n\n /**\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {!import(\"../tilegrid/TileGrid.js\").default} Tile grid.\n */\n getTileGridForProjection(projection) {\n const code = projection.getCode();\n let tileGrid = this.tileGrids_[code];\n if (!tileGrid) {\n // A tile grid that matches the tile size of the source tile grid is more\n // likely to have 1:1 relationships between source tiles and rendered tiles.\n const sourceTileGrid = this.tileGrid;\n const resolutions = sourceTileGrid.getResolutions().slice();\n const origins = resolutions.map(function (resolution, z) {\n return sourceTileGrid.getOrigin(z);\n });\n const tileSizes = resolutions.map(function (resolution, z) {\n return sourceTileGrid.getTileSize(z);\n });\n const length = DEFAULT_MAX_ZOOM + 1;\n for (let z = resolutions.length; z < length; ++z) {\n resolutions.push(resolutions[z - 1] / 2);\n origins.push(origins[z - 1]);\n tileSizes.push(tileSizes[z - 1]);\n }\n tileGrid = new TileGrid({\n extent: sourceTileGrid.getExtent(),\n origins: origins,\n resolutions: resolutions,\n tileSizes: tileSizes,\n });\n this.tileGrids_[code] = tileGrid;\n }\n return tileGrid;\n }\n\n /**\n * Get the tile pixel ratio for this source.\n * @param {number} pixelRatio Pixel ratio.\n * @return {number} Tile pixel ratio.\n */\n getTilePixelRatio(pixelRatio) {\n return pixelRatio;\n }\n\n /**\n * @param {number} z Z.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {import(\"../size.js\").Size} Tile size.\n */\n getTilePixelSize(z, pixelRatio, projection) {\n const tileGrid = this.getTileGridForProjection(projection);\n const tileSize = toSize(tileGrid.getTileSize(z), this.tmpSize);\n return [\n Math.round(tileSize[0] * pixelRatio),\n Math.round(tileSize[1] * pixelRatio),\n ];\n }\n\n /**\n * Increases the cache size if needed\n * @param {number} tileCount Minimum number of tiles needed.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n */\n updateCacheSize(tileCount, projection) {\n super.updateCacheSize(tileCount * 2, projection);\n this.sourceTileCache.highWaterMark =\n this.getTileCacheForProjection(projection).highWaterMark;\n }\n}\n\nexport default VectorTile;\n\n/**\n * Sets the loader for a tile.\n * @param {import(\"../VectorTile.js\").default} tile Vector tile.\n * @param {string} url URL.\n */\nexport function defaultLoadFunction(tile, url) {\n tile.setLoader(\n /**\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n */\n function (extent, resolution, projection) {\n loadFeaturesXhr(\n url,\n tile.getFormat(),\n extent,\n resolution,\n projection,\n tile.onLoad.bind(tile),\n tile.onError.bind(tile)\n );\n }\n );\n}\n","/**\n * @module ol/tilegrid/WMTS\n */\n\nimport TileGrid from './TileGrid.js';\nimport {get as getProjection} from '../proj.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../extent.js\").Extent} [extent] Extent for the tile grid. No tiles\n * outside this extent will be requested by {@link module:ol/source/Tile~TileSource} sources.\n * When no `origin` or `origins` are configured, the `origin` will be set to the\n * top-left corner of the extent.\n * @property {import(\"../coordinate.js\").Coordinate} [origin] The tile grid origin, i.e.\n * where the `x` and `y` axes meet (`[z, 0, 0]`). Tile coordinates increase left\n * to right and downwards. If not specified, `extent` or `origins` must be provided.\n * @property {Array} [origins] Tile grid origins,\n * i.e. where the `x` and `y` axes meet (`[z, 0, 0]`), for each zoom level. If\n * given, the array length should match the length of the `resolutions` array, i.e.\n * each resolution can have a different origin. Tile coordinates increase left to\n * right and downwards. If not specified, `extent` or `origin` must be provided.\n * @property {!Array} resolutions Resolutions. The array index of each\n * resolution needs to match the zoom level. This means that even if a `minZoom`\n * is configured, the resolutions array will have a length of `maxZoom + 1`\n * @property {!Array} matrixIds matrix IDs. The length of this array needs\n * to match the length of the `resolutions` array.\n * @property {Array} [sizes] Number of tile rows and columns\n * of the grid for each zoom level. The values here are the `TileMatrixWidth` and\n * `TileMatrixHeight` advertised in the GetCapabilities response of the WMTS, and\n * define each zoom level's extent together with the `origin` or `origins`.\n * A grid `extent` can be configured in addition, and will further limit the extent for\n * which tile requests are made by sources. If the bottom-left corner of\n * an extent is used as `origin` or `origins`, then the `y` value must be\n * negative because OpenLayers tile coordinates use the top left as the origin.\n * @property {number|import(\"../size.js\").Size} [tileSize] Tile size.\n * @property {Array} [tileSizes] Tile sizes. The length of\n * this array needs to match the length of the `resolutions` array.\n */\n\n/**\n * @classdesc\n * Set the grid pattern for sources accessing WMTS tiled-image servers.\n * @api\n */\nclass WMTSTileGrid extends TileGrid {\n /**\n * @param {Options} options WMTS options.\n */\n constructor(options) {\n super({\n extent: options.extent,\n origin: options.origin,\n origins: options.origins,\n resolutions: options.resolutions,\n tileSize: options.tileSize,\n tileSizes: options.tileSizes,\n sizes: options.sizes,\n });\n\n /**\n * @private\n * @type {!Array}\n */\n this.matrixIds_ = options.matrixIds;\n }\n\n /**\n * @param {number} z Z.\n * @return {string} MatrixId..\n */\n getMatrixId(z) {\n return this.matrixIds_[z];\n }\n\n /**\n * Get the list of matrix identifiers.\n * @return {Array} MatrixIds.\n * @api\n */\n getMatrixIds() {\n return this.matrixIds_;\n }\n}\n\nexport default WMTSTileGrid;\n\n/**\n * Create a tile grid from a WMTS capabilities matrix set and an\n * optional TileMatrixSetLimits.\n * @param {Object} matrixSet An object representing a matrixSet in the\n * capabilities document.\n * @param {import(\"../extent.js\").Extent} [extent] An optional extent to restrict the tile\n * ranges the server provides.\n * @param {Array} [matrixLimits] An optional object representing\n * the available matrices for tileGrid.\n * @return {WMTSTileGrid} WMTS tileGrid instance.\n * @api\n */\nexport function createFromCapabilitiesMatrixSet(\n matrixSet,\n extent,\n matrixLimits\n) {\n /** @type {!Array} */\n const resolutions = [];\n /** @type {!Array} */\n const matrixIds = [];\n /** @type {!Array} */\n const origins = [];\n /** @type {!Array} */\n const tileSizes = [];\n /** @type {!Array} */\n const sizes = [];\n\n matrixLimits = matrixLimits !== undefined ? matrixLimits : [];\n\n const supportedCRSPropName = 'SupportedCRS';\n const matrixIdsPropName = 'TileMatrix';\n const identifierPropName = 'Identifier';\n const scaleDenominatorPropName = 'ScaleDenominator';\n const topLeftCornerPropName = 'TopLeftCorner';\n const tileWidthPropName = 'TileWidth';\n const tileHeightPropName = 'TileHeight';\n\n const code = matrixSet[supportedCRSPropName];\n const projection = getProjection(code);\n const metersPerUnit = projection.getMetersPerUnit();\n // swap origin x and y coordinates if axis orientation is lat/long\n const switchOriginXY = projection.getAxisOrientation().substr(0, 2) == 'ne';\n\n matrixSet[matrixIdsPropName].sort(function (a, b) {\n return b[scaleDenominatorPropName] - a[scaleDenominatorPropName];\n });\n\n matrixSet[matrixIdsPropName].forEach(function (elt) {\n let matrixAvailable;\n // use of matrixLimits to filter TileMatrices from GetCapabilities\n // TileMatrixSet from unavailable matrix levels.\n if (matrixLimits.length > 0) {\n matrixAvailable = matrixLimits.find(function (elt_ml) {\n if (elt[identifierPropName] == elt_ml[matrixIdsPropName]) {\n return true;\n }\n // Fallback for tileMatrix identifiers that don't get prefixed\n // by their tileMatrixSet identifiers.\n if (!elt[identifierPropName].includes(':')) {\n return (\n matrixSet[identifierPropName] + ':' + elt[identifierPropName] ===\n elt_ml[matrixIdsPropName]\n );\n }\n return false;\n });\n } else {\n matrixAvailable = true;\n }\n\n if (matrixAvailable) {\n matrixIds.push(elt[identifierPropName]);\n const resolution =\n (elt[scaleDenominatorPropName] * 0.28e-3) / metersPerUnit;\n const tileWidth = elt[tileWidthPropName];\n const tileHeight = elt[tileHeightPropName];\n if (switchOriginXY) {\n origins.push([\n elt[topLeftCornerPropName][1],\n elt[topLeftCornerPropName][0],\n ]);\n } else {\n origins.push(elt[topLeftCornerPropName]);\n }\n resolutions.push(resolution);\n tileSizes.push(\n tileWidth == tileHeight ? tileWidth : [tileWidth, tileHeight]\n );\n sizes.push([elt['MatrixWidth'], elt['MatrixHeight']]);\n }\n });\n\n return new WMTSTileGrid({\n extent: extent,\n origins: origins,\n resolutions: resolutions,\n matrixIds: matrixIds,\n tileSizes: tileSizes,\n sizes: sizes,\n });\n}\n","/**\n * @module ol/source/WMTS\n */\n\nimport TileImage from './TileImage.js';\nimport {appendParams} from '../uri.js';\nimport {containsExtent} from '../extent.js';\nimport {createFromCapabilitiesMatrixSet} from '../tilegrid/WMTS.js';\nimport {createFromTileUrlFunctions, expandUrl} from '../tileurlfunction.js';\nimport {equivalent, get as getProjection, transformExtent} from '../proj.js';\n\n/**\n * Request encoding. One of 'KVP', 'REST'.\n * @typedef {'KVP' | 'REST'} RequestEncoding\n */\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {number} [cacheSize] Initial tile cache size. Will auto-grow to hold at least the number of tiles in the viewport.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images. Note that\n * you must provide a `crossOrigin` value if you want to access pixel data with the Canvas renderer.\n * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling. By default,\n * linear interpolation is used when resampling. Set to false to use the nearest neighbor instead.\n * @property {import(\"../tilegrid/WMTS.js\").default} tileGrid Tile grid.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection. Default is the view projection.\n * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {RequestEncoding} [requestEncoding='KVP'] Request encoding.\n * @property {string} layer Layer name as advertised in the WMTS capabilities.\n * @property {string} style Style name as advertised in the WMTS capabilities.\n * @property {typeof import(\"../ImageTile.js\").default} [tileClass] Class used to instantiate image tiles. Default is {@link module:ol/ImageTile~ImageTile}.\n * @property {number} [tilePixelRatio=1] The pixel ratio used by the tile service.\n * For example, if the tile service advertizes 256px by 256px tiles but actually sends 512px\n * by 512px images (for retina/hidpi devices) then `tilePixelRatio`\n * should be set to `2`.\n * @property {string} [format='image/jpeg'] Image format. Only used when `requestEncoding` is `'KVP'`.\n * @property {string} [version='1.0.0'] WMTS version.\n * @property {string} matrixSet Matrix set.\n * @property {!Object} [dimensions] Additional \"dimensions\" for tile requests.\n * This is an object with properties named like the advertised WMTS dimensions.\n * @property {string} [url] A URL for the service.\n * For the RESTful request encoding, this is a URL\n * template. For KVP encoding, it is normal URL. A `{?-?}` template pattern,\n * for example `subdomain{a-f}.domain.com`, may be used instead of defining\n * each one separately in the `urls` option.\n * @property {import(\"../Tile.js\").LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL. The default is\n * ```js\n * function(imageTile, src) {\n * imageTile.getImage().src = src;\n * };\n * ```\n * @property {Array} [urls] An array of URLs.\n * Requests will be distributed among the URLs in this array.\n * @property {boolean} [wrapX=false] Whether to wrap the world horizontally.\n * @property {number} [transition] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0]\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n */\n\n/**\n * @classdesc\n * Layer source for tile data from WMTS servers.\n * @api\n */\nclass WMTS extends TileImage {\n /**\n * @param {Options} options WMTS options.\n */\n constructor(options) {\n // TODO: add support for TileMatrixLimits\n\n const requestEncoding =\n options.requestEncoding !== undefined ? options.requestEncoding : 'KVP';\n\n // FIXME: should we create a default tileGrid?\n // we could issue a getCapabilities xhr to retrieve missing configuration\n const tileGrid = options.tileGrid;\n\n let urls = options.urls;\n if (urls === undefined && options.url !== undefined) {\n urls = expandUrl(options.url);\n }\n\n super({\n attributions: options.attributions,\n attributionsCollapsible: options.attributionsCollapsible,\n cacheSize: options.cacheSize,\n crossOrigin: options.crossOrigin,\n interpolate: options.interpolate,\n projection: options.projection,\n reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n tileClass: options.tileClass,\n tileGrid: tileGrid,\n tileLoadFunction: options.tileLoadFunction,\n tilePixelRatio: options.tilePixelRatio,\n urls: urls,\n wrapX: options.wrapX !== undefined ? options.wrapX : false,\n transition: options.transition,\n zDirection: options.zDirection,\n });\n\n /**\n * @private\n * @type {string}\n */\n this.version_ = options.version !== undefined ? options.version : '1.0.0';\n\n /**\n * @private\n * @type {string}\n */\n this.format_ = options.format !== undefined ? options.format : 'image/jpeg';\n\n /**\n * @private\n * @type {!Object}\n */\n this.dimensions_ =\n options.dimensions !== undefined ? options.dimensions : {};\n\n /**\n * @private\n * @type {string}\n */\n this.layer_ = options.layer;\n\n /**\n * @private\n * @type {string}\n */\n this.matrixSet_ = options.matrixSet;\n\n /**\n * @private\n * @type {string}\n */\n this.style_ = options.style;\n\n // FIXME: should we guess this requestEncoding from options.url(s)\n // structure? that would mean KVP only if a template is not provided.\n\n /**\n * @private\n * @type {RequestEncoding}\n */\n this.requestEncoding_ = requestEncoding;\n\n this.setKey(this.getKeyForDimensions_());\n\n if (urls && urls.length > 0) {\n this.tileUrlFunction = createFromTileUrlFunctions(\n urls.map(this.createFromWMTSTemplate.bind(this))\n );\n }\n }\n\n /**\n * Set the URLs to use for requests.\n * URLs may contain OGC conform URL Template Variables: {TileMatrix}, {TileRow}, {TileCol}.\n * @param {Array} urls URLs.\n */\n setUrls(urls) {\n this.urls = urls;\n const key = urls.join('\\n');\n this.setTileUrlFunction(\n createFromTileUrlFunctions(\n urls.map(this.createFromWMTSTemplate.bind(this))\n ),\n key\n );\n }\n\n /**\n * Get the dimensions, i.e. those passed to the constructor through the\n * \"dimensions\" option, and possibly updated using the updateDimensions\n * method.\n * @return {!Object} Dimensions.\n * @api\n */\n getDimensions() {\n return this.dimensions_;\n }\n\n /**\n * Return the image format of the WMTS source.\n * @return {string} Format.\n * @api\n */\n getFormat() {\n return this.format_;\n }\n\n /**\n * Return the layer of the WMTS source.\n * @return {string} Layer.\n * @api\n */\n getLayer() {\n return this.layer_;\n }\n\n /**\n * Return the matrix set of the WMTS source.\n * @return {string} MatrixSet.\n * @api\n */\n getMatrixSet() {\n return this.matrixSet_;\n }\n\n /**\n * Return the request encoding, either \"KVP\" or \"REST\".\n * @return {RequestEncoding} Request encoding.\n * @api\n */\n getRequestEncoding() {\n return this.requestEncoding_;\n }\n\n /**\n * Return the style of the WMTS source.\n * @return {string} Style.\n * @api\n */\n getStyle() {\n return this.style_;\n }\n\n /**\n * Return the version of the WMTS source.\n * @return {string} Version.\n * @api\n */\n getVersion() {\n return this.version_;\n }\n\n /**\n * @private\n * @return {string} The key for the current dimensions.\n */\n getKeyForDimensions_() {\n const res = this.urls ? this.urls.slice(0) : [];\n for (const key in this.dimensions_) {\n res.push(key + '-' + this.dimensions_[key]);\n }\n return res.join('/');\n }\n\n /**\n * Update the dimensions.\n * @param {Object} dimensions Dimensions.\n * @api\n */\n updateDimensions(dimensions) {\n Object.assign(this.dimensions_, dimensions);\n this.setKey(this.getKeyForDimensions_());\n }\n\n /**\n * @param {string} template Template.\n * @return {import(\"../Tile.js\").UrlFunction} Tile URL function.\n */\n createFromWMTSTemplate(template) {\n const requestEncoding = this.requestEncoding_;\n\n // context property names are lower case to allow for a case insensitive\n // replacement as some services use different naming conventions\n const context = {\n 'layer': this.layer_,\n 'style': this.style_,\n 'tilematrixset': this.matrixSet_,\n };\n\n if (requestEncoding == 'KVP') {\n Object.assign(context, {\n 'Service': 'WMTS',\n 'Request': 'GetTile',\n 'Version': this.version_,\n 'Format': this.format_,\n });\n }\n\n // TODO: we may want to create our own appendParams function so that params\n // order conforms to wmts spec guidance, and so that we can avoid to escape\n // special template params\n\n template =\n requestEncoding == 'KVP'\n ? appendParams(template, context)\n : template.replace(/\\{(\\w+?)\\}/g, function (m, p) {\n return p.toLowerCase() in context ? context[p.toLowerCase()] : m;\n });\n\n const tileGrid = /** @type {import(\"../tilegrid/WMTS.js\").default} */ (\n this.tileGrid\n );\n const dimensions = this.dimensions_;\n\n return (\n /**\n * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n * @return {string|undefined} Tile URL.\n */\n function (tileCoord, pixelRatio, projection) {\n if (!tileCoord) {\n return undefined;\n }\n const localContext = {\n 'TileMatrix': tileGrid.getMatrixId(tileCoord[0]),\n 'TileCol': tileCoord[1],\n 'TileRow': tileCoord[2],\n };\n Object.assign(localContext, dimensions);\n let url = template;\n if (requestEncoding == 'KVP') {\n url = appendParams(url, localContext);\n } else {\n url = url.replace(/\\{(\\w+?)\\}/g, function (m, p) {\n return localContext[p];\n });\n }\n return url;\n }\n );\n }\n}\n\nexport default WMTS;\n\n/**\n * Generate source options from a capabilities object.\n * @param {Object} wmtsCap An object representing the capabilities document.\n * @param {!Object} config Configuration properties for the layer. Defaults for\n * the layer will apply if not provided.\n *\n * Required config properties:\n * - layer - {string} The layer identifier.\n *\n * Optional config properties:\n * - matrixSet - {string} The matrix set identifier, required if there is\n * more than one matrix set in the layer capabilities.\n * - projection - {string} The desired CRS when no matrixSet is specified.\n * eg: \"EPSG:3857\". If the desired projection is not available,\n * an error is thrown.\n * - requestEncoding - {string} url encoding format for the layer. Default is\n * the first tile url format found in the GetCapabilities response.\n * - style - {string} The name of the style\n * - format - {string} Image format for the layer. Default is the first\n * format returned in the GetCapabilities response.\n * - crossOrigin - {string|null|undefined} Cross origin. Default is `undefined`.\n * @return {Options|null} WMTS source options object or `null` if the layer was not found.\n * @api\n */\nexport function optionsFromCapabilities(wmtsCap, config) {\n const layers = wmtsCap['Contents']['Layer'];\n const l = layers.find(function (elt) {\n return elt['Identifier'] == config['layer'];\n });\n if (!l) {\n return null;\n }\n const tileMatrixSets = wmtsCap['Contents']['TileMatrixSet'];\n let idx;\n if (l['TileMatrixSetLink'].length > 1) {\n if ('projection' in config) {\n idx = l['TileMatrixSetLink'].findIndex(function (elt) {\n const tileMatrixSet = tileMatrixSets.find(function (el) {\n return el['Identifier'] == elt['TileMatrixSet'];\n });\n const supportedCRS = tileMatrixSet['SupportedCRS'];\n const proj1 = getProjection(supportedCRS);\n const proj2 = getProjection(config['projection']);\n if (proj1 && proj2) {\n return equivalent(proj1, proj2);\n }\n return supportedCRS == config['projection'];\n });\n } else {\n idx = l['TileMatrixSetLink'].findIndex(function (elt) {\n return elt['TileMatrixSet'] == config['matrixSet'];\n });\n }\n } else {\n idx = 0;\n }\n if (idx < 0) {\n idx = 0;\n }\n const matrixSet =\n /** @type {string} */\n (l['TileMatrixSetLink'][idx]['TileMatrixSet']);\n const matrixLimits =\n /** @type {Array} */\n (l['TileMatrixSetLink'][idx]['TileMatrixSetLimits']);\n\n let format = /** @type {string} */ (l['Format'][0]);\n if ('format' in config) {\n format = config['format'];\n }\n idx = l['Style'].findIndex(function (elt) {\n if ('style' in config) {\n return elt['Title'] == config['style'];\n }\n return elt['isDefault'];\n });\n if (idx < 0) {\n idx = 0;\n }\n const style = /** @type {string} */ (l['Style'][idx]['Identifier']);\n\n const dimensions = {};\n if ('Dimension' in l) {\n l['Dimension'].forEach(function (elt, index, array) {\n const key = elt['Identifier'];\n let value = elt['Default'];\n if (value === undefined) {\n value = elt['Value'][0];\n }\n dimensions[key] = value;\n });\n }\n\n const matrixSets = wmtsCap['Contents']['TileMatrixSet'];\n const matrixSetObj = matrixSets.find(function (elt) {\n return elt['Identifier'] == matrixSet;\n });\n\n let projection;\n const code = matrixSetObj['SupportedCRS'];\n if (code) {\n projection = getProjection(code);\n }\n if ('projection' in config) {\n const projConfig = getProjection(config['projection']);\n if (projConfig) {\n if (!projection || equivalent(projConfig, projection)) {\n projection = projConfig;\n }\n }\n }\n\n let wrapX = false;\n const switchXY = projection.getAxisOrientation().substr(0, 2) == 'ne';\n\n let matrix = matrixSetObj.TileMatrix[0];\n\n // create default matrixLimit\n let selectedMatrixLimit = {\n MinTileCol: 0,\n MinTileRow: 0,\n // subtract one to end up at tile top left\n MaxTileCol: matrix.MatrixWidth - 1,\n MaxTileRow: matrix.MatrixHeight - 1,\n };\n\n //in case of matrix limits, use matrix limits to calculate extent\n if (matrixLimits) {\n selectedMatrixLimit = matrixLimits[matrixLimits.length - 1];\n const m = matrixSetObj.TileMatrix.find(\n (tileMatrixValue) =>\n tileMatrixValue.Identifier === selectedMatrixLimit.TileMatrix ||\n matrixSetObj.Identifier + ':' + tileMatrixValue.Identifier ===\n selectedMatrixLimit.TileMatrix\n );\n if (m) {\n matrix = m;\n }\n }\n\n const resolution =\n (matrix.ScaleDenominator * 0.00028) / projection.getMetersPerUnit(); // WMTS 1.0.0: standardized rendering pixel size\n const origin = switchXY\n ? [matrix.TopLeftCorner[1], matrix.TopLeftCorner[0]]\n : matrix.TopLeftCorner;\n const tileSpanX = matrix.TileWidth * resolution;\n const tileSpanY = matrix.TileHeight * resolution;\n let matrixSetExtent = matrixSetObj['BoundingBox'];\n if (matrixSetExtent && switchXY) {\n matrixSetExtent = [\n matrixSetExtent[1],\n matrixSetExtent[0],\n matrixSetExtent[3],\n matrixSetExtent[2],\n ];\n }\n let extent = [\n origin[0] + tileSpanX * selectedMatrixLimit.MinTileCol,\n // add one to get proper bottom/right coordinate\n origin[1] - tileSpanY * (1 + selectedMatrixLimit.MaxTileRow),\n origin[0] + tileSpanX * (1 + selectedMatrixLimit.MaxTileCol),\n origin[1] - tileSpanY * selectedMatrixLimit.MinTileRow,\n ];\n\n if (\n matrixSetExtent !== undefined &&\n !containsExtent(matrixSetExtent, extent)\n ) {\n const wgs84BoundingBox = l['WGS84BoundingBox'];\n const wgs84ProjectionExtent = getProjection('EPSG:4326').getExtent();\n extent = matrixSetExtent;\n if (wgs84BoundingBox) {\n wrapX =\n wgs84BoundingBox[0] === wgs84ProjectionExtent[0] &&\n wgs84BoundingBox[2] === wgs84ProjectionExtent[2];\n } else {\n const wgs84MatrixSetExtent = transformExtent(\n matrixSetExtent,\n matrixSetObj['SupportedCRS'],\n 'EPSG:4326'\n );\n // Ignore slight deviation from the correct x limits\n wrapX =\n wgs84MatrixSetExtent[0] - 1e-10 <= wgs84ProjectionExtent[0] &&\n wgs84MatrixSetExtent[2] + 1e-10 >= wgs84ProjectionExtent[2];\n }\n }\n\n const tileGrid = createFromCapabilitiesMatrixSet(\n matrixSetObj,\n extent,\n matrixLimits\n );\n\n /** @type {!Array} */\n const urls = [];\n let requestEncoding = config['requestEncoding'];\n requestEncoding = requestEncoding !== undefined ? requestEncoding : '';\n\n if (\n 'OperationsMetadata' in wmtsCap &&\n 'GetTile' in wmtsCap['OperationsMetadata']\n ) {\n const gets = wmtsCap['OperationsMetadata']['GetTile']['DCP']['HTTP']['Get'];\n\n for (let i = 0, ii = gets.length; i < ii; ++i) {\n if (gets[i]['Constraint']) {\n const constraint = gets[i]['Constraint'].find(function (element) {\n return element['name'] == 'GetEncoding';\n });\n const encodings = constraint['AllowedValues']['Value'];\n\n if (requestEncoding === '') {\n // requestEncoding not provided, use the first encoding from the list\n requestEncoding = encodings[0];\n }\n if (requestEncoding === 'KVP') {\n if (encodings.includes('KVP')) {\n urls.push(/** @type {string} */ (gets[i]['href']));\n }\n } else {\n break;\n }\n } else if (gets[i]['href']) {\n requestEncoding = 'KVP';\n urls.push(/** @type {string} */ (gets[i]['href']));\n }\n }\n }\n if (urls.length === 0) {\n requestEncoding = 'REST';\n l['ResourceURL'].forEach(function (element) {\n if (element['resourceType'] === 'tile') {\n format = element['format'];\n urls.push(/** @type {string} */ (element['template']));\n }\n });\n }\n\n return {\n urls: urls,\n layer: config['layer'],\n matrixSet: matrixSet,\n format: format,\n projection: projection,\n requestEncoding: requestEncoding,\n tileGrid: tileGrid,\n style: style,\n dimensions: dimensions,\n wrapX: wrapX,\n crossOrigin: config['crossOrigin'],\n };\n}\n","/**\n * @module ol/webgl\n */\n\nimport {SAFARI_BUG_237906} from './has.js';\n\n/**\n * Constants taken from goog.webgl\n */\n\n/**\n * Used by {@link module:ol/webgl/Helper~WebGLHelper} for buffers containing vertices data, such as\n * position, color, texture coordinate, etc. These vertices are then referenced by an index buffer\n * to be drawn on screen (see {@link module:ol/webgl.ELEMENT_ARRAY_BUFFER}).\n * @const\n * @type {number}\n * @api\n */\nexport const ARRAY_BUFFER = 0x8892;\n\n/**\n * Used by {@link module:ol/webgl/Helper~WebGLHelper} for buffers containing indices data.\n * Index buffers are essentially lists of references to vertices defined in a vertex buffer\n * (see {@link module:ol/webgl.ARRAY_BUFFER}), and define the primitives (triangles) to be drawn.\n * @const\n * @type {number}\n * @api\n */\nexport const ELEMENT_ARRAY_BUFFER = 0x8893;\n\n/**\n * Used by {link module:ol/webgl/Buffer~WebGLArrayBuffer}.\n * @const\n * @type {number}\n * @api\n */\nexport const STREAM_DRAW = 0x88e0;\n\n/**\n * Used by {link module:ol/webgl/Buffer~WebGLArrayBuffer}.\n * @const\n * @type {number}\n * @api\n */\nexport const STATIC_DRAW = 0x88e4;\n\n/**\n * Used by {link module:ol/webgl/Buffer~WebGLArrayBuffer}.\n * @const\n * @type {number}\n * @api\n */\nexport const DYNAMIC_DRAW = 0x88e8;\n\n/**\n * @const\n * @type {number}\n */\nexport const UNSIGNED_BYTE = 0x1401;\n\n/**\n * @const\n * @type {number}\n */\nexport const UNSIGNED_SHORT = 0x1403;\n\n/**\n * @const\n * @type {number}\n */\nexport const UNSIGNED_INT = 0x1405;\n\n/**\n * @const\n * @type {number}\n */\nexport const FLOAT = 0x1406;\n\n/** end of goog.webgl constants\n */\n\n/**\n * @const\n * @type {Array}\n */\nconst CONTEXT_IDS = ['experimental-webgl', 'webgl', 'webkit-3d', 'moz-webgl'];\n\n/**\n * @param {HTMLCanvasElement} canvas Canvas.\n * @param {Object} [attributes] Attributes.\n * @return {WebGLRenderingContext} WebGL rendering context.\n */\nexport function getContext(canvas, attributes) {\n attributes = Object.assign(\n {\n preserveDrawingBuffer: true,\n antialias: SAFARI_BUG_237906 ? false : true, // https://bugs.webkit.org/show_bug.cgi?id=237906\n },\n attributes\n );\n const ii = CONTEXT_IDS.length;\n for (let i = 0; i < ii; ++i) {\n try {\n const context = canvas.getContext(CONTEXT_IDS[i], attributes);\n if (context) {\n return /** @type {!WebGLRenderingContext} */ (context);\n }\n } catch (e) {\n // pass\n }\n }\n return null;\n}\n\n/**\n * @type {Array}\n */\nlet supportedExtensions;\n\n/**\n * @return {Array} List of supported WebGL extensions.\n */\nexport function getSupportedExtensions() {\n if (!supportedExtensions) {\n const canvas = document.createElement('canvas');\n const gl = getContext(canvas);\n if (gl) {\n supportedExtensions = gl.getSupportedExtensions();\n }\n }\n return supportedExtensions;\n}\n","/**\n * @module ol/xml\n */\nimport {extend} from './array.js';\n\n/**\n * When using {@link module:ol/xml.makeChildAppender} or\n * {@link module:ol/xml.makeSimpleNodeFactory}, the top `objectStack` item needs\n * to have this structure.\n * @typedef {Object} NodeStackItem\n * @property {Element} node Node.\n */\n\n/**\n * @typedef {function(Element, Array<*>): void} Parser\n */\n\n/**\n * @typedef {function(Element, *, Array<*>): void} Serializer\n */\n\n/**\n * @type {string}\n */\nexport const XML_SCHEMA_INSTANCE_URI =\n 'http://www.w3.org/2001/XMLSchema-instance';\n\n/**\n * @param {string} namespaceURI Namespace URI.\n * @param {string} qualifiedName Qualified name.\n * @return {Element} Node.\n */\nexport function createElementNS(namespaceURI, qualifiedName) {\n return getDocument().createElementNS(namespaceURI, qualifiedName);\n}\n\n/**\n * Recursively grab all text content of child nodes into a single string.\n * @param {Node} node Node.\n * @param {boolean} normalizeWhitespace Normalize whitespace: remove all line\n * breaks.\n * @return {string} All text content.\n * @api\n */\nexport function getAllTextContent(node, normalizeWhitespace) {\n return getAllTextContent_(node, normalizeWhitespace, []).join('');\n}\n\n/**\n * Recursively grab all text content of child nodes into a single string.\n * @param {Node} node Node.\n * @param {boolean} normalizeWhitespace Normalize whitespace: remove all line\n * breaks.\n * @param {Array} accumulator Accumulator.\n * @private\n * @return {Array} Accumulator.\n */\nexport function getAllTextContent_(node, normalizeWhitespace, accumulator) {\n if (\n node.nodeType == Node.CDATA_SECTION_NODE ||\n node.nodeType == Node.TEXT_NODE\n ) {\n if (normalizeWhitespace) {\n accumulator.push(String(node.nodeValue).replace(/(\\r\\n|\\r|\\n)/g, ''));\n } else {\n accumulator.push(node.nodeValue);\n }\n } else {\n let n;\n for (n = node.firstChild; n; n = n.nextSibling) {\n getAllTextContent_(n, normalizeWhitespace, accumulator);\n }\n }\n return accumulator;\n}\n\n/**\n * @param {Object} object Object.\n * @return {boolean} Is a document.\n */\nexport function isDocument(object) {\n return 'documentElement' in object;\n}\n\n/**\n * @param {Element} node Node.\n * @param {?string} namespaceURI Namespace URI.\n * @param {string} name Attribute name.\n * @return {string} Value\n */\nexport function getAttributeNS(node, namespaceURI, name) {\n return node.getAttributeNS(namespaceURI, name) || '';\n}\n\n/**\n * Parse an XML string to an XML Document.\n * @param {string} xml XML.\n * @return {Document} Document.\n * @api\n */\nexport function parse(xml) {\n return new DOMParser().parseFromString(xml, 'application/xml');\n}\n\n/**\n * Make an array extender function for extending the array at the top of the\n * object stack.\n * @param {function(this: T, Node, Array<*>): (Array<*>|undefined)} valueReader Value reader.\n * @param {T} [thisArg] The object to use as `this` in `valueReader`.\n * @return {Parser} Parser.\n * @template T\n */\nexport function makeArrayExtender(valueReader, thisArg) {\n return (\n /**\n * @param {Node} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\n function (node, objectStack) {\n const value = valueReader.call(\n thisArg !== undefined ? thisArg : this,\n node,\n objectStack\n );\n if (value !== undefined) {\n const array = /** @type {Array<*>} */ (\n objectStack[objectStack.length - 1]\n );\n extend(array, value);\n }\n }\n );\n}\n\n/**\n * Make an array pusher function for pushing to the array at the top of the\n * object stack.\n * @param {function(this: T, Element, Array<*>): *} valueReader Value reader.\n * @param {T} [thisArg] The object to use as `this` in `valueReader`.\n * @return {Parser} Parser.\n * @template T\n */\nexport function makeArrayPusher(valueReader, thisArg) {\n return (\n /**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\n function (node, objectStack) {\n const value = valueReader.call(\n thisArg !== undefined ? thisArg : this,\n node,\n objectStack\n );\n if (value !== undefined) {\n const array = /** @type {Array<*>} */ (\n objectStack[objectStack.length - 1]\n );\n array.push(value);\n }\n }\n );\n}\n\n/**\n * Make an object stack replacer function for replacing the object at the\n * top of the stack.\n * @param {function(this: T, Node, Array<*>): *} valueReader Value reader.\n * @param {T} [thisArg] The object to use as `this` in `valueReader`.\n * @return {Parser} Parser.\n * @template T\n */\nexport function makeReplacer(valueReader, thisArg) {\n return (\n /**\n * @param {Node} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\n function (node, objectStack) {\n const value = valueReader.call(\n thisArg !== undefined ? thisArg : this,\n node,\n objectStack\n );\n if (value !== undefined) {\n objectStack[objectStack.length - 1] = value;\n }\n }\n );\n}\n\n/**\n * Make an object property pusher function for adding a property to the\n * object at the top of the stack.\n * @param {function(this: T, Element, Array<*>): *} valueReader Value reader.\n * @param {string} [property] Property.\n * @param {T} [thisArg] The object to use as `this` in `valueReader`.\n * @return {Parser} Parser.\n * @template T\n */\nexport function makeObjectPropertyPusher(valueReader, property, thisArg) {\n return (\n /**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\n function (node, objectStack) {\n const value = valueReader.call(\n thisArg !== undefined ? thisArg : this,\n node,\n objectStack\n );\n if (value !== undefined) {\n const object = /** @type {!Object} */ (\n objectStack[objectStack.length - 1]\n );\n const name = property !== undefined ? property : node.localName;\n let array;\n if (name in object) {\n array = object[name];\n } else {\n array = [];\n object[name] = array;\n }\n array.push(value);\n }\n }\n );\n}\n\n/**\n * Make an object property setter function.\n * @param {function(this: T, Element, Array<*>): *} valueReader Value reader.\n * @param {string} [property] Property.\n * @param {T} [thisArg] The object to use as `this` in `valueReader`.\n * @return {Parser} Parser.\n * @template T\n */\nexport function makeObjectPropertySetter(valueReader, property, thisArg) {\n return (\n /**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\n function (node, objectStack) {\n const value = valueReader.call(\n thisArg !== undefined ? thisArg : this,\n node,\n objectStack\n );\n if (value !== undefined) {\n const object = /** @type {!Object} */ (\n objectStack[objectStack.length - 1]\n );\n const name = property !== undefined ? property : node.localName;\n object[name] = value;\n }\n }\n );\n}\n\n/**\n * Create a serializer that appends nodes written by its `nodeWriter` to its\n * designated parent. The parent is the `node` of the\n * {@link module:ol/xml~NodeStackItem} at the top of the `objectStack`.\n * @param {function(this: T, Node, V, Array<*>): void} nodeWriter Node writer.\n * @param {T} [thisArg] The object to use as `this` in `nodeWriter`.\n * @return {Serializer} Serializer.\n * @template T, V\n */\nexport function makeChildAppender(nodeWriter, thisArg) {\n return function (node, value, objectStack) {\n nodeWriter.call(\n thisArg !== undefined ? thisArg : this,\n node,\n value,\n objectStack\n );\n const parent = /** @type {NodeStackItem} */ (\n objectStack[objectStack.length - 1]\n );\n const parentNode = parent.node;\n parentNode.appendChild(node);\n };\n}\n\n/**\n * Create a serializer that calls the provided `nodeWriter` from\n * {@link module:ol/xml.serialize}. This can be used by the parent writer to have the\n * `nodeWriter` called with an array of values when the `nodeWriter` was\n * designed to serialize a single item. An example would be a LineString\n * geometry writer, which could be reused for writing MultiLineString\n * geometries.\n * @param {function(this: T, Element, V, Array<*>): void} nodeWriter Node writer.\n * @param {T} [thisArg] The object to use as `this` in `nodeWriter`.\n * @return {Serializer} Serializer.\n * @template T, V\n */\nexport function makeArraySerializer(nodeWriter, thisArg) {\n let serializersNS, nodeFactory;\n return function (node, value, objectStack) {\n if (serializersNS === undefined) {\n serializersNS = {};\n const serializers = {};\n serializers[node.localName] = nodeWriter;\n serializersNS[node.namespaceURI] = serializers;\n nodeFactory = makeSimpleNodeFactory(node.localName);\n }\n serialize(serializersNS, nodeFactory, value, objectStack);\n };\n}\n\n/**\n * Create a node factory which can use the `keys` passed to\n * {@link module:ol/xml.serialize} or {@link module:ol/xml.pushSerializeAndPop} as node names,\n * or a fixed node name. The namespace of the created nodes can either be fixed,\n * or the parent namespace will be used.\n * @param {string} [fixedNodeName] Fixed node name which will be used for all\n * created nodes. If not provided, the 3rd argument to the resulting node\n * factory needs to be provided and will be the nodeName.\n * @param {string} [fixedNamespaceURI] Fixed namespace URI which will be used for\n * all created nodes. If not provided, the namespace of the parent node will\n * be used.\n * @return {function(*, Array<*>, string=): (Node|undefined)} Node factory.\n */\nexport function makeSimpleNodeFactory(fixedNodeName, fixedNamespaceURI) {\n return (\n /**\n * @param {*} value Value.\n * @param {Array<*>} objectStack Object stack.\n * @param {string} [newNodeName] Node name.\n * @return {Node} Node.\n */\n function (value, objectStack, newNodeName) {\n const context = /** @type {NodeStackItem} */ (\n objectStack[objectStack.length - 1]\n );\n const node = context.node;\n let nodeName = fixedNodeName;\n if (nodeName === undefined) {\n nodeName = newNodeName;\n }\n\n const namespaceURI =\n fixedNamespaceURI !== undefined ? fixedNamespaceURI : node.namespaceURI;\n return createElementNS(namespaceURI, /** @type {string} */ (nodeName));\n }\n );\n}\n\n/**\n * A node factory that creates a node using the parent's `namespaceURI` and the\n * `nodeName` passed by {@link module:ol/xml.serialize} or\n * {@link module:ol/xml.pushSerializeAndPop} to the node factory.\n * @const\n * @type {function(*, Array<*>, string=): (Node|undefined)}\n */\nexport const OBJECT_PROPERTY_NODE_FACTORY = makeSimpleNodeFactory();\n\n/**\n * Create an array of `values` to be used with {@link module:ol/xml.serialize} or\n * {@link module:ol/xml.pushSerializeAndPop}, where `orderedKeys` has to be provided as\n * `key` argument.\n * @param {Object} object Key-value pairs for the sequence. Keys can\n * be a subset of the `orderedKeys`.\n * @param {Array} orderedKeys Keys in the order of the sequence.\n * @return {Array<*>} Values in the order of the sequence. The resulting array\n * has the same length as the `orderedKeys` array. Values that are not\n * present in `object` will be `undefined` in the resulting array.\n */\nexport function makeSequence(object, orderedKeys) {\n const length = orderedKeys.length;\n const sequence = new Array(length);\n for (let i = 0; i < length; ++i) {\n sequence[i] = object[orderedKeys[i]];\n }\n return sequence;\n}\n\n/**\n * Create a namespaced structure, using the same values for each namespace.\n * This can be used as a starting point for versioned parsers, when only a few\n * values are version specific.\n * @param {Array} namespaceURIs Namespace URIs.\n * @param {T} structure Structure.\n * @param {Object} [structureNS] Namespaced structure to add to.\n * @return {Object} Namespaced structure.\n * @template T\n */\nexport function makeStructureNS(namespaceURIs, structure, structureNS) {\n structureNS = structureNS !== undefined ? structureNS : {};\n let i, ii;\n for (i = 0, ii = namespaceURIs.length; i < ii; ++i) {\n structureNS[namespaceURIs[i]] = structure;\n }\n return structureNS;\n}\n\n/**\n * Parse a node using the parsers and object stack.\n * @param {Object>} parsersNS\n * Parsers by namespace.\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @param {*} [thisArg] The object to use as `this`.\n */\nexport function parseNode(parsersNS, node, objectStack, thisArg) {\n let n;\n for (n = node.firstElementChild; n; n = n.nextElementSibling) {\n const parsers = parsersNS[n.namespaceURI];\n if (parsers !== undefined) {\n const parser = parsers[n.localName];\n if (parser !== undefined) {\n parser.call(thisArg, n, objectStack);\n }\n }\n }\n}\n\n/**\n * Push an object on top of the stack, parse and return the popped object.\n * @param {T} object Object.\n * @param {Object>} parsersNS\n * Parsers by namespace.\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @param {*} [thisArg] The object to use as `this`.\n * @return {T} Object.\n * @template T\n */\nexport function pushParseAndPop(object, parsersNS, node, objectStack, thisArg) {\n objectStack.push(object);\n parseNode(parsersNS, node, objectStack, thisArg);\n return /** @type {T} */ (objectStack.pop());\n}\n\n/**\n * Walk through an array of `values` and call a serializer for each value.\n * @param {Object>} serializersNS\n * Namespaced serializers.\n * @param {function(this: T, *, Array<*>, (string|undefined)): (Node|undefined)} nodeFactory\n * Node factory. The `nodeFactory` creates the node whose namespace and name\n * will be used to choose a node writer from `serializersNS`. This\n * separation allows us to decide what kind of node to create, depending on\n * the value we want to serialize. An example for this would be different\n * geometry writers based on the geometry type.\n * @param {Array<*>} values Values to serialize. An example would be an array\n * of {@link module:ol/Feature~Feature} instances.\n * @param {Array<*>} objectStack Node stack.\n * @param {Array} [keys] Keys of the `values`. Will be passed to the\n * `nodeFactory`. This is used for serializing object literals where the\n * node name relates to the property key. The array length of `keys` has\n * to match the length of `values`. For serializing a sequence, `keys`\n * determines the order of the sequence.\n * @param {T} [thisArg] The object to use as `this` for the node factory and\n * serializers.\n * @template T\n */\nexport function serialize(\n serializersNS,\n nodeFactory,\n values,\n objectStack,\n keys,\n thisArg\n) {\n const length = (keys !== undefined ? keys : values).length;\n let value, node;\n for (let i = 0; i < length; ++i) {\n value = values[i];\n if (value !== undefined) {\n node = nodeFactory.call(\n thisArg !== undefined ? thisArg : this,\n value,\n objectStack,\n keys !== undefined ? keys[i] : undefined\n );\n if (node !== undefined) {\n serializersNS[node.namespaceURI][node.localName].call(\n thisArg,\n node,\n value,\n objectStack\n );\n }\n }\n }\n}\n\n/**\n * @param {O} object Object.\n * @param {Object>} serializersNS\n * Namespaced serializers.\n * @param {function(this: T, *, Array<*>, (string|undefined)): (Node|undefined)} nodeFactory\n * Node factory. The `nodeFactory` creates the node whose namespace and name\n * will be used to choose a node writer from `serializersNS`. This\n * separation allows us to decide what kind of node to create, depending on\n * the value we want to serialize. An example for this would be different\n * geometry writers based on the geometry type.\n * @param {Array<*>} values Values to serialize. An example would be an array\n * of {@link module:ol/Feature~Feature} instances.\n * @param {Array<*>} objectStack Node stack.\n * @param {Array} [keys] Keys of the `values`. Will be passed to the\n * `nodeFactory`. This is used for serializing object literals where the\n * node name relates to the property key. The array length of `keys` has\n * to match the length of `values`. For serializing a sequence, `keys`\n * determines the order of the sequence.\n * @param {T} [thisArg] The object to use as `this` for the node factory and\n * serializers.\n * @return {O|undefined} Object.\n * @template O, T\n */\nexport function pushSerializeAndPop(\n object,\n serializersNS,\n nodeFactory,\n values,\n objectStack,\n keys,\n thisArg\n) {\n objectStack.push(object);\n serialize(serializersNS, nodeFactory, values, objectStack, keys, thisArg);\n return /** @type {O|undefined} */ (objectStack.pop());\n}\n\nlet xmlSerializer_ = undefined;\n\n/**\n * Register a XMLSerializer. Can be used to inject a XMLSerializer\n * where there is no globally available implementation.\n *\n * @param {XMLSerializer} xmlSerializer A XMLSerializer.\n * @api\n */\nexport function registerXMLSerializer(xmlSerializer) {\n xmlSerializer_ = xmlSerializer;\n}\n\n/**\n * @return {XMLSerializer} The XMLSerializer.\n */\nexport function getXMLSerializer() {\n if (xmlSerializer_ === undefined && typeof XMLSerializer !== 'undefined') {\n xmlSerializer_ = new XMLSerializer();\n }\n return xmlSerializer_;\n}\n\nlet document_ = undefined;\n\n/**\n * Register a Document to use when creating nodes for XML serializations. Can be used\n * to inject a Document where there is no globally available implementation.\n *\n * @param {Document} document A Document.\n * @api\n */\nexport function registerDocument(document) {\n document_ = document;\n}\n\n/**\n * Get a document that should be used when creating nodes for XML serializations.\n * @return {Document} The document.\n */\nexport function getDocument() {\n if (document_ === undefined && typeof document !== 'undefined') {\n document_ = document.implementation.createDocument('', '', null);\n }\n return document_;\n}\n","/**\n * @module ol/webgl/Buffer\n */\nimport {\n ARRAY_BUFFER,\n DYNAMIC_DRAW,\n ELEMENT_ARRAY_BUFFER,\n STATIC_DRAW,\n STREAM_DRAW,\n} from '../webgl.js';\nimport {assert} from '../asserts.js';\n\n/**\n * Used to describe the intended usage for the data: `STATIC_DRAW`, `STREAM_DRAW`\n * or `DYNAMIC_DRAW`.\n * @enum {number}\n */\nexport const BufferUsage = {\n STATIC_DRAW: STATIC_DRAW,\n STREAM_DRAW: STREAM_DRAW,\n DYNAMIC_DRAW: DYNAMIC_DRAW,\n};\n\n/**\n * @classdesc\n * Object used to store an array of data as well as usage information for that data.\n * Stores typed arrays internally, either Float32Array or Uint16/32Array depending on\n * the buffer type (ARRAY_BUFFER or ELEMENT_ARRAY_BUFFER) and available extensions.\n *\n * To populate the array, you can either use:\n * * A size using `#ofSize(buffer)`\n * * An `ArrayBuffer` object using `#fromArrayBuffer(buffer)`\n * * A plain array using `#fromArray(array)`\n *\n * Note:\n * See the documentation of [WebGLRenderingContext.bufferData](https://developer.mozilla.org/en-US/docs/Web/API/WebGLRenderingContext/bufferData)\n * for more info on buffer usage.\n * @api\n */\nclass WebGLArrayBuffer {\n /**\n * @param {number} type Buffer type, either ARRAY_BUFFER or ELEMENT_ARRAY_BUFFER.\n * @param {number} [usage] Intended usage, either `STATIC_DRAW`, `STREAM_DRAW` or `DYNAMIC_DRAW`.\n * Default is `DYNAMIC_DRAW`.\n */\n constructor(type, usage) {\n /**\n * @private\n * @type {Float32Array|Uint32Array}\n */\n this.array = null;\n\n /**\n * @private\n * @type {number}\n */\n this.type = type;\n\n assert(type === ARRAY_BUFFER || type === ELEMENT_ARRAY_BUFFER, 62);\n\n /**\n * @private\n * @type {number}\n */\n this.usage = usage !== undefined ? usage : BufferUsage.STATIC_DRAW;\n }\n\n /**\n * Populates the buffer with an array of the given size (all values will be zeroes).\n * @param {number} size Array size\n */\n ofSize(size) {\n this.array = new (getArrayClassForType(this.type))(size);\n }\n\n /**\n * Populates the buffer with an array of the given size.\n * @param {Array} array Numerical array\n */\n fromArray(array) {\n this.array = getArrayClassForType(this.type).from(array);\n }\n\n /**\n * Populates the buffer with a raw binary array buffer.\n * @param {ArrayBuffer} buffer Raw binary buffer to populate the array with. Note that this buffer must have been\n * initialized for the same typed array class.\n */\n fromArrayBuffer(buffer) {\n this.array = new (getArrayClassForType(this.type))(buffer);\n }\n\n /**\n * @return {number} Buffer type.\n */\n getType() {\n return this.type;\n }\n\n /**\n * Will return null if the buffer was not initialized\n * @return {Float32Array|Uint32Array} Array.\n */\n getArray() {\n return this.array;\n }\n\n /**\n * @return {number} Usage.\n */\n getUsage() {\n return this.usage;\n }\n\n /**\n * Will return 0 if the buffer is not initialized\n * @return {number} Array size\n */\n getSize() {\n return this.array ? this.array.length : 0;\n }\n}\n\n/**\n * Returns a typed array constructor based on the given buffer type\n * @param {number} type Buffer type, either ARRAY_BUFFER or ELEMENT_ARRAY_BUFFER.\n * @return {Float32ArrayConstructor|Uint32ArrayConstructor} The typed array class to use for this buffer.\n */\nexport function getArrayClassForType(type) {\n switch (type) {\n case ARRAY_BUFFER:\n return Float32Array;\n case ELEMENT_ARRAY_BUFFER:\n return Uint32Array;\n default:\n return Float32Array;\n }\n}\n\nexport default WebGLArrayBuffer;\n","/**\n * @module ol/webgl/ContextEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n LOST: 'webglcontextlost',\n RESTORED: 'webglcontextrestored',\n};\n","/**\n * @module ol/webgl/PostProcessingPass\n */\n\nimport {getUid} from '../util.js';\n\nconst DEFAULT_VERTEX_SHADER = `\n precision mediump float;\n \n attribute vec2 a_position;\n varying vec2 v_texCoord;\n varying vec2 v_screenCoord;\n \n uniform vec2 u_screenSize;\n \n void main() {\n v_texCoord = a_position * 0.5 + 0.5;\n v_screenCoord = v_texCoord * u_screenSize;\n gl_Position = vec4(a_position, 0.0, 1.0);\n }\n`;\n\nconst DEFAULT_FRAGMENT_SHADER = `\n precision mediump float;\n \n uniform sampler2D u_image;\n uniform float u_opacity;\n \n varying vec2 v_texCoord;\n \n void main() {\n gl_FragColor = texture2D(u_image, v_texCoord) * u_opacity;\n }\n`;\n\n/**\n * @typedef {Object} Options\n * @property {WebGLRenderingContext} webGlContext WebGL context; mandatory.\n * @property {number} [scaleRatio] Scale ratio; if < 1, the post process will render to a texture smaller than\n * the main canvas that will then be sampled up (useful for saving resource on blur steps).\n * @property {string} [vertexShader] Vertex shader source\n * @property {string} [fragmentShader] Fragment shader source\n * @property {Object} [uniforms] Uniform definitions for the post process step\n */\n\n/**\n * @typedef {Object} UniformInternalDescription\n * @property {import(\"./Helper\").UniformValue} value Value\n * @property {WebGLUniformLocation} location Location\n * @property {WebGLTexture} [texture] Texture\n * @private\n */\n\n/**\n * @classdesc\n * This class is used to define Post Processing passes with custom shaders and uniforms.\n * This is used internally by {@link module:ol/webgl/Helper~WebGLHelper}.\n *\n * Please note that the final output on the DOM canvas is expected to have premultiplied alpha, which means that\n * a pixel which is 100% red with an opacity of 50% must have a color of (r=0.5, g=0, b=0, a=0.5).\n * Failing to provide pixel colors with premultiplied alpha will result in render anomalies.\n *\n * The default post-processing pass does *not* multiply color values with alpha value, it expects color values to be\n * premultiplied.\n *\n * Default shaders are shown hereafter:\n *\n * * Vertex shader:\n *\n * ```\n * precision mediump float;\n *\n * attribute vec2 a_position;\n * varying vec2 v_texCoord;\n * varying vec2 v_screenCoord;\n *\n * uniform vec2 u_screenSize;\n *\n * void main() {\n * v_texCoord = a_position * 0.5 + 0.5;\n * v_screenCoord = v_texCoord * u_screenSize;\n * gl_Position = vec4(a_position, 0.0, 1.0);\n * }\n * ```\n *\n * * Fragment shader:\n *\n * ```\n * precision mediump float;\n *\n * uniform sampler2D u_image;\n * uniform float u_opacity;\n *\n * varying vec2 v_texCoord;\n *\n * void main() {\n * gl_FragColor = texture2D(u_image, v_texCoord) * u_opacity;\n * }\n * ```\n *\n * @api\n */\nclass WebGLPostProcessingPass {\n /**\n * @param {Options} options Options.\n */\n constructor(options) {\n this.gl_ = options.webGlContext;\n const gl = this.gl_;\n\n this.scaleRatio_ = options.scaleRatio || 1;\n\n this.renderTargetTexture_ = gl.createTexture();\n this.renderTargetTextureSize_ = null;\n\n this.frameBuffer_ = gl.createFramebuffer();\n\n // compile the program for the frame buffer\n // TODO: make compilation errors show up\n const vertexShader = gl.createShader(gl.VERTEX_SHADER);\n gl.shaderSource(\n vertexShader,\n options.vertexShader || DEFAULT_VERTEX_SHADER\n );\n gl.compileShader(vertexShader);\n const fragmentShader = gl.createShader(gl.FRAGMENT_SHADER);\n gl.shaderSource(\n fragmentShader,\n options.fragmentShader || DEFAULT_FRAGMENT_SHADER\n );\n gl.compileShader(fragmentShader);\n this.renderTargetProgram_ = gl.createProgram();\n gl.attachShader(this.renderTargetProgram_, vertexShader);\n gl.attachShader(this.renderTargetProgram_, fragmentShader);\n gl.linkProgram(this.renderTargetProgram_);\n\n // bind the vertices buffer for the frame buffer\n this.renderTargetVerticesBuffer_ = gl.createBuffer();\n const verticesArray = [-1, -1, 1, -1, -1, 1, 1, -1, 1, 1, -1, 1];\n gl.bindBuffer(gl.ARRAY_BUFFER, this.renderTargetVerticesBuffer_);\n gl.bufferData(\n gl.ARRAY_BUFFER,\n new Float32Array(verticesArray),\n gl.STATIC_DRAW\n );\n\n this.renderTargetAttribLocation_ = gl.getAttribLocation(\n this.renderTargetProgram_,\n 'a_position'\n );\n this.renderTargetUniformLocation_ = gl.getUniformLocation(\n this.renderTargetProgram_,\n 'u_screenSize'\n );\n this.renderTargetOpacityLocation_ = gl.getUniformLocation(\n this.renderTargetProgram_,\n 'u_opacity'\n );\n this.renderTargetTextureLocation_ = gl.getUniformLocation(\n this.renderTargetProgram_,\n 'u_image'\n );\n\n /**\n * Holds info about custom uniforms used in the post processing pass\n * @type {Array}\n * @private\n */\n this.uniforms_ = [];\n options.uniforms &&\n Object.keys(options.uniforms).forEach((name) => {\n this.uniforms_.push({\n value: options.uniforms[name],\n location: gl.getUniformLocation(this.renderTargetProgram_, name),\n });\n });\n }\n\n /**\n * Get the WebGL rendering context\n * @return {WebGLRenderingContext} The rendering context.\n * @api\n */\n getGL() {\n return this.gl_;\n }\n\n /**\n * Initialize the render target texture of the post process, make sure it is at the\n * right size and bind it as a render target for the next draw calls.\n * The last step to be initialized will be the one where the primitives are rendered.\n * @param {import(\"../Map.js\").FrameState} frameState current frame state\n * @api\n */\n init(frameState) {\n const gl = this.getGL();\n const textureSize = [\n gl.drawingBufferWidth * this.scaleRatio_,\n gl.drawingBufferHeight * this.scaleRatio_,\n ];\n\n // rendering goes to my buffer\n gl.bindFramebuffer(gl.FRAMEBUFFER, this.getFrameBuffer());\n gl.viewport(0, 0, textureSize[0], textureSize[1]);\n\n // if size has changed: adjust canvas & render target texture\n if (\n !this.renderTargetTextureSize_ ||\n this.renderTargetTextureSize_[0] !== textureSize[0] ||\n this.renderTargetTextureSize_[1] !== textureSize[1]\n ) {\n this.renderTargetTextureSize_ = textureSize;\n\n // create a new texture\n const level = 0;\n const internalFormat = gl.RGBA;\n const border = 0;\n const format = gl.RGBA;\n const type = gl.UNSIGNED_BYTE;\n const data = null;\n gl.bindTexture(gl.TEXTURE_2D, this.renderTargetTexture_);\n gl.texImage2D(\n gl.TEXTURE_2D,\n level,\n internalFormat,\n textureSize[0],\n textureSize[1],\n border,\n format,\n type,\n data\n );\n\n gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);\n gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);\n gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);\n\n // bind the texture to the framebuffer\n gl.framebufferTexture2D(\n gl.FRAMEBUFFER,\n gl.COLOR_ATTACHMENT0,\n gl.TEXTURE_2D,\n this.renderTargetTexture_,\n 0\n );\n }\n }\n\n /**\n * Render to the next postprocessing pass (or to the canvas if final pass).\n * @param {import(\"../Map.js\").FrameState} frameState current frame state\n * @param {WebGLPostProcessingPass} [nextPass] Next pass, optional\n * @param {function(WebGLRenderingContext, import(\"../Map.js\").FrameState):void} [preCompose] Called before composing.\n * @param {function(WebGLRenderingContext, import(\"../Map.js\").FrameState):void} [postCompose] Called before composing.\n * @api\n */\n apply(frameState, nextPass, preCompose, postCompose) {\n const gl = this.getGL();\n const size = frameState.size;\n\n gl.bindFramebuffer(\n gl.FRAMEBUFFER,\n nextPass ? nextPass.getFrameBuffer() : null\n );\n gl.activeTexture(gl.TEXTURE0);\n gl.bindTexture(gl.TEXTURE_2D, this.renderTargetTexture_);\n\n if (!nextPass) {\n // clear the canvas if we are the first to render to it\n // and preserveDrawingBuffer is true\n const canvasId = getUid(gl.canvas);\n if (!frameState.renderTargets[canvasId]) {\n const attributes = gl.getContextAttributes();\n if (attributes && attributes.preserveDrawingBuffer) {\n gl.clearColor(0.0, 0.0, 0.0, 0.0);\n gl.clear(gl.COLOR_BUFFER_BIT);\n }\n\n frameState.renderTargets[canvasId] = true;\n }\n }\n\n gl.enable(gl.BLEND);\n gl.blendFunc(gl.ONE, gl.ONE_MINUS_SRC_ALPHA);\n gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);\n\n gl.bindBuffer(gl.ARRAY_BUFFER, this.renderTargetVerticesBuffer_);\n\n gl.useProgram(this.renderTargetProgram_);\n gl.enableVertexAttribArray(this.renderTargetAttribLocation_);\n gl.vertexAttribPointer(\n this.renderTargetAttribLocation_,\n 2,\n gl.FLOAT,\n false,\n 0,\n 0\n );\n gl.uniform2f(this.renderTargetUniformLocation_, size[0], size[1]);\n gl.uniform1i(this.renderTargetTextureLocation_, 0);\n\n const opacity = frameState.layerStatesArray[frameState.layerIndex].opacity;\n gl.uniform1f(this.renderTargetOpacityLocation_, opacity);\n\n this.applyUniforms(frameState);\n\n if (preCompose) {\n preCompose(gl, frameState);\n }\n gl.drawArrays(gl.TRIANGLES, 0, 6);\n if (postCompose) {\n postCompose(gl, frameState);\n }\n }\n\n /**\n * @return {WebGLFramebuffer} Frame buffer\n * @api\n */\n getFrameBuffer() {\n return this.frameBuffer_;\n }\n\n /**\n * Sets the custom uniforms based on what was given in the constructor.\n * @param {import(\"../Map.js\").FrameState} frameState Frame state.\n * @private\n */\n applyUniforms(frameState) {\n const gl = this.getGL();\n\n let value;\n let textureSlot = 1;\n this.uniforms_.forEach(function (uniform) {\n value =\n typeof uniform.value === 'function'\n ? uniform.value(frameState)\n : uniform.value;\n\n // apply value based on type\n if (value instanceof HTMLCanvasElement || value instanceof ImageData) {\n // create a texture & put data\n if (!uniform.texture) {\n uniform.texture = gl.createTexture();\n }\n gl.activeTexture(gl[`TEXTURE${textureSlot}`]);\n gl.bindTexture(gl.TEXTURE_2D, uniform.texture);\n gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);\n gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);\n gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);\n\n if (value instanceof ImageData) {\n gl.texImage2D(\n gl.TEXTURE_2D,\n 0,\n gl.RGBA,\n gl.RGBA,\n value.width,\n value.height,\n 0,\n gl.UNSIGNED_BYTE,\n new Uint8Array(value.data)\n );\n } else {\n gl.texImage2D(\n gl.TEXTURE_2D,\n 0,\n gl.RGBA,\n gl.RGBA,\n gl.UNSIGNED_BYTE,\n value\n );\n }\n\n // fill texture slots\n gl.uniform1i(uniform.location, textureSlot++);\n } else if (Array.isArray(value)) {\n switch (value.length) {\n case 2:\n gl.uniform2f(uniform.location, value[0], value[1]);\n return;\n case 3:\n gl.uniform3f(uniform.location, value[0], value[1], value[2]);\n return;\n case 4:\n gl.uniform4f(\n uniform.location,\n value[0],\n value[1],\n value[2],\n value[3]\n );\n return;\n default:\n return;\n }\n } else if (typeof value === 'number') {\n gl.uniform1f(uniform.location, value);\n }\n });\n }\n}\n\nexport default WebGLPostProcessingPass;\n","/**\n * @module ol/vec/mat4\n */\n\n/**\n * @return {Array} \"4x4 matrix representing a 3D identity transform.\"\n */\nexport function create() {\n return [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1];\n}\n\n/**\n * @param {Array} mat4 Flattened 4x4 matrix receiving the result.\n * @param {import(\"../transform.js\").Transform} transform Transformation matrix.\n * @return {Array} \"2D transformation matrix as flattened 4x4 matrix.\"\n */\nexport function fromTransform(mat4, transform) {\n mat4[0] = transform[0];\n mat4[1] = transform[1];\n mat4[4] = transform[2];\n mat4[5] = transform[3];\n mat4[12] = transform[4];\n mat4[13] = transform[5];\n return mat4;\n}\n","/**\n * @module ol/webgl/Helper\n */\nimport ContextEventType from '../webgl/ContextEventType.js';\nimport Disposable from '../Disposable.js';\nimport WebGLPostProcessingPass from './PostProcessingPass.js';\nimport {\n FLOAT,\n UNSIGNED_BYTE,\n UNSIGNED_INT,\n UNSIGNED_SHORT,\n getContext,\n} from '../webgl.js';\nimport {clear} from '../obj.js';\nimport {\n compose as composeTransform,\n create as createTransform,\n reset as resetTransform,\n rotate as rotateTransform,\n scale as scaleTransform,\n} from '../transform.js';\nimport {create, fromTransform} from '../vec/mat4.js';\nimport {getUid} from '../util.js';\n\n/**\n * @typedef {Object} BufferCacheEntry\n * @property {import(\"./Buffer.js\").default} buffer Buffer.\n * @property {WebGLBuffer} webGlBuffer WebGlBuffer.\n */\n\n/**\n * Shader types, either `FRAGMENT_SHADER` or `VERTEX_SHADER`.\n * @enum {number}\n */\nexport const ShaderType = {\n FRAGMENT_SHADER: 0x8b30,\n VERTEX_SHADER: 0x8b31,\n};\n\n/**\n * Names of uniforms made available to all shaders.\n * Please note: changing these *will* break custom shaders!\n * @enum {string}\n */\nexport const DefaultUniform = {\n PROJECTION_MATRIX: 'u_projectionMatrix',\n OFFSET_SCALE_MATRIX: 'u_offsetScaleMatrix',\n OFFSET_ROTATION_MATRIX: 'u_offsetRotateMatrix',\n TIME: 'u_time',\n ZOOM: 'u_zoom',\n RESOLUTION: 'u_resolution',\n SIZE_PX: 'u_sizePx',\n PIXEL_RATIO: 'u_pixelRatio',\n};\n\n/**\n * Attribute types, either `UNSIGNED_BYTE`, `UNSIGNED_SHORT`, `UNSIGNED_INT` or `FLOAT`\n * Note: an attribute stored in a `Float32Array` should be of type `FLOAT`.\n * @enum {number}\n */\nexport const AttributeType = {\n UNSIGNED_BYTE: UNSIGNED_BYTE,\n UNSIGNED_SHORT: UNSIGNED_SHORT,\n UNSIGNED_INT: UNSIGNED_INT,\n FLOAT: FLOAT,\n};\n\n/**\n * Description of an attribute in a buffer\n * @typedef {Object} AttributeDescription\n * @property {string} name Attribute name to use in shaders\n * @property {number} size Number of components per attributes\n * @property {AttributeType} [type] Attribute type, i.e. number of bytes used to store the value. This is\n * determined by the class of typed array which the buffer uses (eg. `Float32Array` for a `FLOAT` attribute).\n * Default is `FLOAT`.\n */\n\n/**\n * @typedef {number|Array|HTMLCanvasElement|HTMLImageElement|ImageData|import(\"../transform\").Transform} UniformLiteralValue\n */\n\n/**\n * Uniform value can be a number, array of numbers (2 to 4), canvas element or a callback returning\n * one of the previous types.\n * @typedef {UniformLiteralValue|function(import(\"../Map.js\").FrameState):UniformLiteralValue} UniformValue\n */\n\n/**\n * @typedef {Object} PostProcessesOptions\n * @property {number} [scaleRatio] Scale ratio; if < 1, the post process will render to a texture smaller than\n * the main canvas which will then be sampled up (useful for saving resource on blur steps).\n * @property {string} [vertexShader] Vertex shader source\n * @property {string} [fragmentShader] Fragment shader source\n * @property {Object} [uniforms] Uniform definitions for the post process step\n */\n\n/**\n * @typedef {Object} Options\n * @property {Object} [uniforms] Uniform definitions; property names must match the uniform\n * names in the provided or default shaders.\n * @property {Array} [postProcesses] Post-processes definitions\n * @property {string} [canvasCacheKey] The cache key for the canvas.\n */\n\n/**\n * @typedef {Object} UniformInternalDescription\n * @property {string} name Name\n * @property {UniformValue} [value] Value\n * @property {UniformValue} [prevValue] The previous value.\n * @property {WebGLTexture} [texture] Texture\n * @private\n */\n\n/**\n * @typedef {Object} CanvasCacheItem\n * @property {HTMLCanvasElement} canvas Canvas element.\n * @property {number} users The count of users of this canvas.\n */\n\n/**\n * @type {Object}\n */\nconst canvasCache = {};\n\n/**\n * @param {string} key The cache key for the canvas.\n * @return {string} The shared cache key.\n */\nfunction getSharedCanvasCacheKey(key) {\n return 'shared/' + key;\n}\n\nlet uniqueCanvasCacheKeyCount = 0;\n\n/**\n * @return {string} The unique cache key.\n */\nfunction getUniqueCanvasCacheKey() {\n const key = 'unique/' + uniqueCanvasCacheKeyCount;\n uniqueCanvasCacheKeyCount += 1;\n return key;\n}\n\n/**\n * @param {string} key The cache key for the canvas.\n * @return {HTMLCanvasElement} The canvas.\n */\nfunction getCanvas(key) {\n let cacheItem = canvasCache[key];\n if (!cacheItem) {\n const canvas = document.createElement('canvas');\n canvas.style.position = 'absolute';\n canvas.style.left = '0';\n cacheItem = {users: 0, canvas};\n canvasCache[key] = cacheItem;\n }\n\n cacheItem.users += 1;\n return cacheItem.canvas;\n}\n\n/**\n * @param {string} key The cache key for the canvas.\n */\nfunction releaseCanvas(key) {\n const cacheItem = canvasCache[key];\n if (!cacheItem) {\n return;\n }\n\n cacheItem.users -= 1;\n if (cacheItem.users > 0) {\n return;\n }\n\n const canvas = cacheItem.canvas;\n const gl = getContext(canvas);\n const extension = gl.getExtension('WEBGL_lose_context');\n if (extension) {\n extension.loseContext();\n }\n\n delete canvasCache[key];\n}\n\n/**\n * @classdesc\n * This class is intended to provide low-level functions related to WebGL rendering, so that accessing\n * directly the WebGL API should not be required anymore.\n *\n * Several operations are handled by the `WebGLHelper` class:\n *\n * ### Define custom shaders and uniforms\n *\n * *Shaders* are low-level programs executed on the GPU and written in GLSL. There are two types of shaders:\n *\n * Vertex shaders are used to manipulate the position and attribute of *vertices* of rendered primitives (ie. corners of a square).\n * Outputs are:\n *\n * * `gl_Position`: position of the vertex in screen space\n *\n * * Varyings usually prefixed with `v_` are passed on to the fragment shader\n *\n * Fragment shaders are used to control the actual color of the pixels drawn on screen. Their only output is `gl_FragColor`.\n *\n * Both shaders can take *uniforms* or *attributes* as input. Attributes are explained later. Uniforms are common, read-only values that\n * can be changed at every frame and can be of type float, arrays of float or images.\n *\n * Shaders must be compiled and assembled into a program like so:\n * ```js\n * // here we simply create two shaders and assemble them in a program which is then used\n * // for subsequent rendering calls; note how a frameState is required to set up a program,\n * // as several default uniforms are computed from it (projection matrix, zoom level, etc.)\n * const vertexShader = new WebGLVertex(VERTEX_SHADER);\n * const fragmentShader = new WebGLFragment(FRAGMENT_SHADER);\n * const program = this.context.getProgram(fragmentShader, vertexShader);\n * helper.useProgram(this.program, frameState);\n * ```\n *\n * Uniforms are defined using the `uniforms` option and can either be explicit values or callbacks taking the frame state as argument.\n * You can also change their value along the way like so:\n * ```js\n * helper.setUniformFloatValue('u_value', valueAsNumber);\n * ```\n *\n * ### Defining post processing passes\n *\n * *Post processing* describes the act of rendering primitives to a texture, and then rendering this texture to the final canvas\n * while applying special effects in screen space.\n * Typical uses are: blurring, color manipulation, depth of field, filtering...\n *\n * The `WebGLHelper` class offers the possibility to define post processes at creation time using the `postProcesses` option.\n * A post process step accepts the following options:\n *\n * * `fragmentShader` and `vertexShader`: text literals in GLSL language that will be compiled and used in the post processing step.\n * * `uniforms`: uniforms can be defined for the post processing steps just like for the main render.\n * * `scaleRatio`: allows using an intermediate texture smaller or higher than the final canvas in the post processing step.\n * This is typically used in blur steps to reduce the performance overhead by using an already downsampled texture as input.\n *\n * The {@link module:ol/webgl/PostProcessingPass~WebGLPostProcessingPass} class is used internally, refer to its documentation for more info.\n *\n * ### Binding WebGL buffers and flushing data into them\n *\n * Data that must be passed to the GPU has to be transferred using {@link module:ol/webgl/Buffer~WebGLArrayBuffer} objects.\n * A buffer has to be created only once, but must be bound every time the buffer content will be used for rendering.\n * This is done using {@link bindBuffer}.\n * When the buffer's array content has changed, the new data has to be flushed to the GPU memory; this is done using\n * {@link flushBufferData}. Note: this operation is expensive and should be done as infrequently as possible.\n *\n * When binding an array buffer, a `target` parameter must be given: it should be either {@link module:ol/webgl.ARRAY_BUFFER}\n * (if the buffer contains vertices data) or {@link module:ol/webgl.ELEMENT_ARRAY_BUFFER} (if the buffer contains indices data).\n *\n * Examples below:\n * ```js\n * // at initialization phase\n * const verticesBuffer = new WebGLArrayBuffer([], DYNAMIC_DRAW);\n * const indicesBuffer = new WebGLArrayBuffer([], DYNAMIC_DRAW);\n *\n * // when array values have changed\n * helper.flushBufferData(ARRAY_BUFFER, this.verticesBuffer);\n * helper.flushBufferData(ELEMENT_ARRAY_BUFFER, this.indicesBuffer);\n *\n * // at rendering phase\n * helper.bindBuffer(ARRAY_BUFFER, this.verticesBuffer);\n * helper.bindBuffer(ELEMENT_ARRAY_BUFFER, this.indicesBuffer);\n * ```\n *\n * ### Specifying attributes\n *\n * The GPU only receives the data as arrays of numbers. These numbers must be handled differently depending on what it describes (position, texture coordinate...).\n * Attributes are used to specify these uses. Specify the attribute names with\n * {@link module:ol/webgl/Helper~WebGLHelper#enableAttributes} (see code snippet below).\n *\n * Please note that you will have to specify the type and offset of the attributes in the data array. You can refer to the documentation of [WebGLRenderingContext.vertexAttribPointer](https://developer.mozilla.org/en-US/docs/Web/API/WebGLRenderingContext/vertexAttribPointer) for more explanation.\n * ```js\n * // here we indicate that the data array has the following structure:\n * // [posX, posY, offsetX, offsetY, texCoordU, texCoordV, posX, posY, ...]\n * helper.enableAttributes([\n * {\n * name: 'a_position',\n * size: 2\n * },\n * {\n * name: 'a_offset',\n * size: 2\n * },\n * {\n * name: 'a_texCoord',\n * size: 2\n * }\n * ])\n * ```\n *\n * ### Rendering primitives\n *\n * Once all the steps above have been achieved, rendering primitives to the screen is done using {@link prepareDraw}, {@link drawElements} and {@link finalizeDraw}.\n * ```js\n * // frame preparation step\n * helper.prepareDraw(frameState);\n *\n * // call this for every data array that has to be rendered on screen\n * helper.drawElements(0, this.indicesBuffer.getArray().length);\n *\n * // finalize the rendering by applying post processes\n * helper.finalizeDraw(frameState);\n * ```\n *\n * For an example usage of this class, refer to {@link module:ol/renderer/webgl/PointsLayer~WebGLPointsLayerRenderer}.\n */\nclass WebGLHelper extends Disposable {\n /**\n * @param {Options} [options] Options.\n */\n constructor(options) {\n super();\n options = options || {};\n\n /** @private */\n this.boundHandleWebGLContextLost_ = this.handleWebGLContextLost.bind(this);\n\n /** @private */\n this.boundHandleWebGLContextRestored_ =\n this.handleWebGLContextRestored.bind(this);\n\n /**\n * @private\n * @type {string}\n */\n this.canvasCacheKey_ = options.canvasCacheKey\n ? getSharedCanvasCacheKey(options.canvasCacheKey)\n : getUniqueCanvasCacheKey();\n\n /**\n * @private\n * @type {HTMLCanvasElement}\n */\n this.canvas_ = getCanvas(this.canvasCacheKey_);\n\n /**\n * @private\n * @type {WebGLRenderingContext}\n */\n this.gl_ = getContext(this.canvas_);\n\n /**\n * @private\n * @type {!Object}\n */\n this.bufferCache_ = {};\n\n /**\n * @private\n * @type {Object}\n */\n this.extensionCache_ = {};\n\n /**\n * @private\n * @type {WebGLProgram}\n */\n this.currentProgram_ = null;\n\n this.canvas_.addEventListener(\n ContextEventType.LOST,\n this.boundHandleWebGLContextLost_\n );\n this.canvas_.addEventListener(\n ContextEventType.RESTORED,\n this.boundHandleWebGLContextRestored_\n );\n\n /**\n * @private\n * @type {import(\"../transform.js\").Transform}\n */\n this.offsetRotateMatrix_ = createTransform();\n\n /**\n * @private\n * @type {import(\"../transform.js\").Transform}\n */\n this.offsetScaleMatrix_ = createTransform();\n\n /**\n * @private\n * @type {Array}\n */\n this.tmpMat4_ = create();\n\n /**\n * @private\n * @type {Object}\n */\n this.uniformLocations_ = {};\n\n /**\n * @private\n * @type {Object}\n */\n this.attribLocations_ = {};\n\n /**\n * Holds info about custom uniforms used in the post processing pass.\n * If the uniform is a texture, the WebGL Texture object will be stored here.\n * @type {Array}\n * @private\n */\n this.uniforms_ = [];\n if (options.uniforms) {\n this.setUniforms(options.uniforms);\n }\n\n const gl = this.getGL();\n\n /**\n * An array of PostProcessingPass objects is kept in this variable, built from the steps provided in the\n * options. If no post process was given, a default one is used (so as not to have to make an exception to\n * the frame buffer logic).\n * @type {Array}\n * @private\n */\n this.postProcessPasses_ = options.postProcesses\n ? options.postProcesses.map(function (options) {\n return new WebGLPostProcessingPass({\n webGlContext: gl,\n scaleRatio: options.scaleRatio,\n vertexShader: options.vertexShader,\n fragmentShader: options.fragmentShader,\n uniforms: options.uniforms,\n });\n })\n : [new WebGLPostProcessingPass({webGlContext: gl})];\n\n /**\n * @type {string|null}\n * @private\n */\n this.shaderCompileErrors_ = null;\n\n /**\n * @type {number}\n * @private\n */\n this.startTime_ = Date.now();\n }\n\n /**\n * @param {Object} uniforms Uniform definitions.\n */\n setUniforms(uniforms) {\n this.uniforms_ = [];\n for (const name in uniforms) {\n this.uniforms_.push({\n name: name,\n value: uniforms[name],\n });\n }\n this.uniformLocations_ = {};\n }\n\n /**\n * @param {string} canvasCacheKey The canvas cache key.\n * @return {boolean} The provided key matches the one this helper was constructed with.\n */\n canvasCacheKeyMatches(canvasCacheKey) {\n return this.canvasCacheKey_ === getSharedCanvasCacheKey(canvasCacheKey);\n }\n\n /**\n * Get a WebGL extension. If the extension is not supported, null is returned.\n * Extensions are cached after they are enabled for the first time.\n * @param {string} name The extension name.\n * @return {Object|null} The extension or null if not supported.\n */\n getExtension(name) {\n if (name in this.extensionCache_) {\n return this.extensionCache_[name];\n }\n const extension = this.gl_.getExtension(name);\n this.extensionCache_[name] = extension;\n return extension;\n }\n\n /**\n * Just bind the buffer if it's in the cache. Otherwise create\n * the WebGL buffer, bind it, populate it, and add an entry to\n * the cache.\n * @param {import(\"./Buffer\").default} buffer Buffer.\n */\n bindBuffer(buffer) {\n const gl = this.getGL();\n const bufferKey = getUid(buffer);\n let bufferCache = this.bufferCache_[bufferKey];\n if (!bufferCache) {\n const webGlBuffer = gl.createBuffer();\n bufferCache = {\n buffer: buffer,\n webGlBuffer: webGlBuffer,\n };\n this.bufferCache_[bufferKey] = bufferCache;\n }\n gl.bindBuffer(buffer.getType(), bufferCache.webGlBuffer);\n }\n\n /**\n * Update the data contained in the buffer array; this is required for the\n * new data to be rendered\n * @param {import(\"./Buffer\").default} buffer Buffer.\n */\n flushBufferData(buffer) {\n const gl = this.getGL();\n this.bindBuffer(buffer);\n gl.bufferData(buffer.getType(), buffer.getArray(), buffer.getUsage());\n }\n\n /**\n * @param {import(\"./Buffer.js\").default} buf Buffer.\n */\n deleteBuffer(buf) {\n const gl = this.getGL();\n const bufferKey = getUid(buf);\n const bufferCacheEntry = this.bufferCache_[bufferKey];\n if (bufferCacheEntry && !gl.isContextLost()) {\n gl.deleteBuffer(bufferCacheEntry.webGlBuffer);\n }\n delete this.bufferCache_[bufferKey];\n }\n\n /**\n * Clean up.\n */\n disposeInternal() {\n this.canvas_.removeEventListener(\n ContextEventType.LOST,\n this.boundHandleWebGLContextLost_\n );\n this.canvas_.removeEventListener(\n ContextEventType.RESTORED,\n this.boundHandleWebGLContextRestored_\n );\n\n releaseCanvas(this.canvasCacheKey_);\n\n delete this.gl_;\n delete this.canvas_;\n }\n\n /**\n * Clear the buffer & set the viewport to draw.\n * Post process passes will be initialized here, the first one being bound as a render target for\n * subsequent draw calls.\n * @param {import(\"../Map.js\").FrameState} frameState current frame state\n * @param {boolean} [disableAlphaBlend] If true, no alpha blending will happen.\n */\n prepareDraw(frameState, disableAlphaBlend) {\n const gl = this.getGL();\n const canvas = this.getCanvas();\n const size = frameState.size;\n const pixelRatio = frameState.pixelRatio;\n\n canvas.width = size[0] * pixelRatio;\n canvas.height = size[1] * pixelRatio;\n canvas.style.width = size[0] + 'px';\n canvas.style.height = size[1] + 'px';\n\n // loop backwards in post processes list\n for (let i = this.postProcessPasses_.length - 1; i >= 0; i--) {\n this.postProcessPasses_[i].init(frameState);\n }\n\n gl.bindTexture(gl.TEXTURE_2D, null);\n\n gl.clearColor(0.0, 0.0, 0.0, 0.0);\n gl.clear(gl.COLOR_BUFFER_BIT);\n\n gl.enable(gl.BLEND);\n gl.blendFunc(gl.ONE, disableAlphaBlend ? gl.ZERO : gl.ONE_MINUS_SRC_ALPHA);\n }\n\n /**\n * Clear the render target & bind it for future draw operations.\n * This is similar to `prepareDraw`, only post processes will not be applied.\n * Note: the whole viewport will be drawn to the render target, regardless of its size.\n * @param {import(\"../Map.js\").FrameState} frameState current frame state\n * @param {import(\"./RenderTarget.js\").default} renderTarget Render target to draw to\n * @param {boolean} [disableAlphaBlend] If true, no alpha blending will happen.\n */\n prepareDrawToRenderTarget(frameState, renderTarget, disableAlphaBlend) {\n const gl = this.getGL();\n const size = renderTarget.getSize();\n\n gl.bindFramebuffer(gl.FRAMEBUFFER, renderTarget.getFramebuffer());\n gl.viewport(0, 0, size[0], size[1]);\n gl.bindTexture(gl.TEXTURE_2D, renderTarget.getTexture());\n gl.clearColor(0.0, 0.0, 0.0, 0.0);\n gl.clear(gl.COLOR_BUFFER_BIT);\n gl.enable(gl.BLEND);\n gl.blendFunc(gl.ONE, disableAlphaBlend ? gl.ZERO : gl.ONE_MINUS_SRC_ALPHA);\n }\n\n /**\n * Execute a draw call based on the currently bound program, texture, buffers, attributes.\n * @param {number} start Start index.\n * @param {number} end End index.\n */\n drawElements(start, end) {\n const gl = this.getGL();\n this.getExtension('OES_element_index_uint');\n\n const elementType = gl.UNSIGNED_INT;\n const elementSize = 4;\n\n const numItems = end - start;\n const offsetInBytes = start * elementSize;\n gl.drawElements(gl.TRIANGLES, numItems, elementType, offsetInBytes);\n }\n\n /**\n * Apply the successive post process passes which will eventually render to the actual canvas.\n * @param {import(\"../Map.js\").FrameState} frameState current frame state\n * @param {function(WebGLRenderingContext, import(\"../Map.js\").FrameState):void} [preCompose] Called before composing.\n * @param {function(WebGLRenderingContext, import(\"../Map.js\").FrameState):void} [postCompose] Called before composing.\n */\n finalizeDraw(frameState, preCompose, postCompose) {\n // apply post processes using the next one as target\n for (let i = 0, ii = this.postProcessPasses_.length; i < ii; i++) {\n if (i === ii - 1) {\n this.postProcessPasses_[i].apply(\n frameState,\n null,\n preCompose,\n postCompose\n );\n } else {\n this.postProcessPasses_[i].apply(\n frameState,\n this.postProcessPasses_[i + 1]\n );\n }\n }\n }\n\n /**\n * @return {HTMLCanvasElement} Canvas.\n */\n getCanvas() {\n return this.canvas_;\n }\n\n /**\n * Get the WebGL rendering context\n * @return {WebGLRenderingContext} The rendering context.\n */\n getGL() {\n return this.gl_;\n }\n\n /**\n * Sets the default matrix uniforms for a given frame state. This is called internally in `prepareDraw`.\n * @param {import(\"../Map.js\").FrameState} frameState Frame state.\n */\n applyFrameState(frameState) {\n const size = frameState.size;\n const rotation = frameState.viewState.rotation;\n const pixelRatio = frameState.pixelRatio;\n\n const offsetScaleMatrix = resetTransform(this.offsetScaleMatrix_);\n scaleTransform(offsetScaleMatrix, 2 / size[0], 2 / size[1]);\n\n const offsetRotateMatrix = resetTransform(this.offsetRotateMatrix_);\n if (rotation !== 0) {\n rotateTransform(offsetRotateMatrix, -rotation);\n }\n\n this.setUniformMatrixValue(\n DefaultUniform.OFFSET_SCALE_MATRIX,\n fromTransform(this.tmpMat4_, offsetScaleMatrix)\n );\n this.setUniformMatrixValue(\n DefaultUniform.OFFSET_ROTATION_MATRIX,\n fromTransform(this.tmpMat4_, offsetRotateMatrix)\n );\n\n this.setUniformFloatValue(\n DefaultUniform.TIME,\n (Date.now() - this.startTime_) * 0.001\n );\n this.setUniformFloatValue(DefaultUniform.ZOOM, frameState.viewState.zoom);\n this.setUniformFloatValue(\n DefaultUniform.RESOLUTION,\n frameState.viewState.resolution\n );\n this.setUniformFloatValue(DefaultUniform.PIXEL_RATIO, pixelRatio);\n this.setUniformFloatVec2(DefaultUniform.SIZE_PX, [size[0], size[1]]);\n }\n\n /**\n * Sets the custom uniforms based on what was given in the constructor. This is called internally in `prepareDraw`.\n * @param {import(\"../Map.js\").FrameState} frameState Frame state.\n */\n applyUniforms(frameState) {\n const gl = this.getGL();\n\n let value;\n let textureSlot = 0;\n this.uniforms_.forEach((uniform) => {\n value =\n typeof uniform.value === 'function'\n ? uniform.value(frameState)\n : uniform.value;\n\n // apply value based on type\n if (\n value instanceof HTMLCanvasElement ||\n value instanceof HTMLImageElement ||\n value instanceof ImageData\n ) {\n // create a texture & put data\n if (!uniform.texture) {\n uniform.prevValue = undefined;\n uniform.texture = gl.createTexture();\n }\n gl.activeTexture(gl[`TEXTURE${textureSlot}`]);\n gl.bindTexture(gl.TEXTURE_2D, uniform.texture);\n gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);\n gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);\n gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);\n\n const imageReady =\n !(value instanceof HTMLImageElement) ||\n /** @type {HTMLImageElement} */ (value).complete;\n if (imageReady && uniform.prevValue !== value) {\n uniform.prevValue = value;\n gl.texImage2D(\n gl.TEXTURE_2D,\n 0,\n gl.RGBA,\n gl.RGBA,\n gl.UNSIGNED_BYTE,\n value\n );\n }\n\n // fill texture slots by increasing index\n gl.uniform1i(this.getUniformLocation(uniform.name), textureSlot++);\n } else if (Array.isArray(value) && value.length === 6) {\n this.setUniformMatrixValue(\n uniform.name,\n fromTransform(this.tmpMat4_, value)\n );\n } else if (Array.isArray(value) && value.length <= 4) {\n switch (value.length) {\n case 2:\n gl.uniform2f(\n this.getUniformLocation(uniform.name),\n value[0],\n value[1]\n );\n return;\n case 3:\n gl.uniform3f(\n this.getUniformLocation(uniform.name),\n value[0],\n value[1],\n value[2]\n );\n return;\n case 4:\n gl.uniform4f(\n this.getUniformLocation(uniform.name),\n value[0],\n value[1],\n value[2],\n value[3]\n );\n return;\n default:\n return;\n }\n } else if (typeof value === 'number') {\n gl.uniform1f(this.getUniformLocation(uniform.name), value);\n }\n });\n }\n\n /**\n * Set up a program for use. The program will be set as the current one. Then, the uniforms used\n * in the program will be set based on the current frame state and the helper configuration.\n * @param {WebGLProgram} program Program.\n * @param {import(\"../Map.js\").FrameState} frameState Frame state.\n */\n useProgram(program, frameState) {\n const gl = this.getGL();\n gl.useProgram(program);\n this.currentProgram_ = program;\n this.uniformLocations_ = {};\n this.attribLocations_ = {};\n this.applyFrameState(frameState);\n this.applyUniforms(frameState);\n }\n\n /**\n * Will attempt to compile a vertex or fragment shader based on source\n * On error, the shader will be returned but\n * `gl.getShaderParameter(shader, gl.COMPILE_STATUS)` will return `true`\n * Use `gl.getShaderInfoLog(shader)` to have details\n * @param {string} source Shader source\n * @param {ShaderType} type VERTEX_SHADER or FRAGMENT_SHADER\n * @return {WebGLShader} Shader object\n */\n compileShader(source, type) {\n const gl = this.getGL();\n const shader = gl.createShader(type);\n gl.shaderSource(shader, source);\n gl.compileShader(shader);\n return shader;\n }\n\n /**\n * Create a program for a vertex and fragment shader. Throws if shader compilation fails.\n * @param {string} fragmentShaderSource Fragment shader source.\n * @param {string} vertexShaderSource Vertex shader source.\n * @return {WebGLProgram} Program\n */\n getProgram(fragmentShaderSource, vertexShaderSource) {\n const gl = this.getGL();\n\n const fragmentShader = this.compileShader(\n fragmentShaderSource,\n gl.FRAGMENT_SHADER\n );\n\n const vertexShader = this.compileShader(\n vertexShaderSource,\n gl.VERTEX_SHADER\n );\n\n const program = gl.createProgram();\n gl.attachShader(program, fragmentShader);\n gl.attachShader(program, vertexShader);\n gl.linkProgram(program);\n\n if (!gl.getShaderParameter(fragmentShader, gl.COMPILE_STATUS)) {\n const message = `Fragment shader compilation failed: ${gl.getShaderInfoLog(\n fragmentShader\n )}`;\n throw new Error(message);\n }\n gl.deleteShader(fragmentShader);\n\n if (!gl.getShaderParameter(vertexShader, gl.COMPILE_STATUS)) {\n const message = `Vertex shader compilation failed: ${gl.getShaderInfoLog(\n vertexShader\n )}`;\n throw new Error(message);\n }\n gl.deleteShader(vertexShader);\n\n if (!gl.getProgramParameter(program, gl.LINK_STATUS)) {\n const message = `GL program linking failed: ${gl.getShaderInfoLog(\n vertexShader\n )}`;\n throw new Error(message);\n }\n\n return program;\n }\n\n /**\n * Will get the location from the shader or the cache\n * @param {string} name Uniform name\n * @return {WebGLUniformLocation} uniformLocation\n */\n getUniformLocation(name) {\n if (this.uniformLocations_[name] === undefined) {\n this.uniformLocations_[name] = this.getGL().getUniformLocation(\n this.currentProgram_,\n name\n );\n }\n return this.uniformLocations_[name];\n }\n\n /**\n * Will get the location from the shader or the cache\n * @param {string} name Attribute name\n * @return {number} attribLocation\n */\n getAttributeLocation(name) {\n if (this.attribLocations_[name] === undefined) {\n this.attribLocations_[name] = this.getGL().getAttribLocation(\n this.currentProgram_,\n name\n );\n }\n return this.attribLocations_[name];\n }\n\n /**\n * Modifies the given transform to apply the rotation/translation/scaling of the given frame state.\n * The resulting transform can be used to convert world space coordinates to view coordinates.\n * @param {import(\"../Map.js\").FrameState} frameState Frame state.\n * @param {import(\"../transform\").Transform} transform Transform to update.\n * @return {import(\"../transform\").Transform} The updated transform object.\n */\n makeProjectionTransform(frameState, transform) {\n const size = frameState.size;\n const rotation = frameState.viewState.rotation;\n const resolution = frameState.viewState.resolution;\n const center = frameState.viewState.center;\n\n resetTransform(transform);\n composeTransform(\n transform,\n 0,\n 0,\n 2 / (resolution * size[0]),\n 2 / (resolution * size[1]),\n -rotation,\n -center[0],\n -center[1]\n );\n return transform;\n }\n\n /**\n * Give a value for a standard float uniform\n * @param {string} uniform Uniform name\n * @param {number} value Value\n */\n setUniformFloatValue(uniform, value) {\n this.getGL().uniform1f(this.getUniformLocation(uniform), value);\n }\n\n /**\n * Give a value for a vec2 uniform\n * @param {string} uniform Uniform name\n * @param {Array} value Array of length 4.\n */\n setUniformFloatVec2(uniform, value) {\n this.getGL().uniform2fv(this.getUniformLocation(uniform), value);\n }\n\n /**\n * Give a value for a vec4 uniform\n * @param {string} uniform Uniform name\n * @param {Array} value Array of length 4.\n */\n setUniformFloatVec4(uniform, value) {\n this.getGL().uniform4fv(this.getUniformLocation(uniform), value);\n }\n\n /**\n * Give a value for a standard matrix4 uniform\n * @param {string} uniform Uniform name\n * @param {Array} value Matrix value\n */\n setUniformMatrixValue(uniform, value) {\n this.getGL().uniformMatrix4fv(\n this.getUniformLocation(uniform),\n false,\n value\n );\n }\n\n /**\n * Will set the currently bound buffer to an attribute of the shader program. Used by `#enableAttributes`\n * internally.\n * @param {string} attribName Attribute name\n * @param {number} size Number of components per attributes\n * @param {number} type UNSIGNED_INT, UNSIGNED_BYTE, UNSIGNED_SHORT or FLOAT\n * @param {number} stride Stride in bytes (0 means attribs are packed)\n * @param {number} offset Offset in bytes\n * @private\n */\n enableAttributeArray_(attribName, size, type, stride, offset) {\n const location = this.getAttributeLocation(attribName);\n // the attribute has not been found in the shaders; do not enable it\n if (location < 0) {\n return;\n }\n this.getGL().enableVertexAttribArray(location);\n this.getGL().vertexAttribPointer(\n location,\n size,\n type,\n false,\n stride,\n offset\n );\n }\n\n /**\n * Will enable the following attributes to be read from the currently bound buffer,\n * i.e. tell the GPU where to read the different attributes in the buffer. An error in the\n * size/type/order of attributes will most likely break the rendering and throw a WebGL exception.\n * @param {Array} attributes Ordered list of attributes to read from the buffer\n */\n enableAttributes(attributes) {\n const stride = computeAttributesStride(attributes);\n let offset = 0;\n for (let i = 0; i < attributes.length; i++) {\n const attr = attributes[i];\n this.enableAttributeArray_(\n attr.name,\n attr.size,\n attr.type || FLOAT,\n stride,\n offset\n );\n offset += attr.size * getByteSizeFromType(attr.type);\n }\n }\n\n /**\n * WebGL context was lost\n * @private\n */\n handleWebGLContextLost() {\n clear(this.bufferCache_);\n this.currentProgram_ = null;\n }\n\n /**\n * WebGL context was restored\n * @private\n */\n handleWebGLContextRestored() {}\n\n /**\n * Will create or reuse a given webgl texture and apply the given size. If no image data\n * specified, the texture will be empty, otherwise image data will be used and the `size`\n * parameter will be ignored.\n * Note: wrap parameters are set to clamp to edge, min filter is set to linear.\n * @param {Array} size Expected size of the texture\n * @param {ImageData|HTMLImageElement|HTMLCanvasElement} [data] Image data/object to bind to the texture\n * @param {WebGLTexture} [texture] Existing texture to reuse\n * @return {WebGLTexture} The generated texture\n */\n createTexture(size, data, texture) {\n const gl = this.getGL();\n texture = texture || gl.createTexture();\n\n // set params & size\n const level = 0;\n const internalFormat = gl.RGBA;\n const border = 0;\n const format = gl.RGBA;\n const type = gl.UNSIGNED_BYTE;\n gl.bindTexture(gl.TEXTURE_2D, texture);\n if (data) {\n gl.texImage2D(gl.TEXTURE_2D, level, internalFormat, format, type, data);\n } else {\n gl.texImage2D(\n gl.TEXTURE_2D,\n level,\n internalFormat,\n size[0],\n size[1],\n border,\n format,\n type,\n null\n );\n }\n gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);\n gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);\n gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);\n\n return texture;\n }\n}\n\n/**\n * Compute a stride in bytes based on a list of attributes\n * @param {Array} attributes Ordered list of attributes\n * @return {number} Stride, ie amount of values for each vertex in the vertex buffer\n */\nexport function computeAttributesStride(attributes) {\n let stride = 0;\n for (let i = 0; i < attributes.length; i++) {\n const attr = attributes[i];\n stride += attr.size * getByteSizeFromType(attr.type);\n }\n return stride;\n}\n\n/**\n * Computes the size in byte of an attribute type.\n * @param {AttributeType} type Attribute type\n * @return {number} The size in bytes\n */\nfunction getByteSizeFromType(type) {\n switch (type) {\n case AttributeType.UNSIGNED_BYTE:\n return Uint8Array.BYTES_PER_ELEMENT;\n case AttributeType.UNSIGNED_SHORT:\n return Uint16Array.BYTES_PER_ELEMENT;\n case AttributeType.UNSIGNED_INT:\n return Uint32Array.BYTES_PER_ELEMENT;\n case AttributeType.FLOAT:\n default:\n return Float32Array.BYTES_PER_ELEMENT;\n }\n}\n\nexport default WebGLHelper;\n","/**\n * @module ol/webgl/PaletteTexture\n */\n\nclass PaletteTexture {\n /**\n * @param {string} name The name of the texture.\n * @param {Uint8Array} data The texture data.\n */\n constructor(name, data) {\n this.name = name;\n this.data = data;\n\n /**\n * @type {WebGLTexture}\n * @private\n */\n this.texture_ = null;\n }\n\n /**\n * @param {WebGLRenderingContext} gl Rendering context.\n * @return {WebGLTexture} The texture.\n */\n getTexture(gl) {\n if (!this.texture_) {\n const texture = gl.createTexture();\n gl.bindTexture(gl.TEXTURE_2D, texture);\n gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);\n gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);\n gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);\n gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);\n gl.texImage2D(\n gl.TEXTURE_2D,\n 0,\n gl.RGBA,\n this.data.length / 4,\n 1,\n 0,\n gl.RGBA,\n gl.UNSIGNED_BYTE,\n this.data\n );\n this.texture_ = texture;\n }\n return this.texture_;\n }\n}\n\nexport default PaletteTexture;\n","/**\n * A wrapper class to simplify rendering to a texture instead of the final canvas\n * @module ol/webgl/RenderTarget\n */\nimport {equals} from '../array.js';\n\n// for pixel color reading\nconst tmpArray4 = new Uint8Array(4);\n\n/**\n * @classdesc\n * This class is a wrapper around the association of both a `WebGLTexture` and a `WebGLFramebuffer` instances,\n * simplifying initialization and binding for rendering.\n * @api\n */\nclass WebGLRenderTarget {\n /**\n * @param {import(\"./Helper.js\").default} helper WebGL helper; mandatory.\n * @param {Array} [size] Expected size of the render target texture; note: this can be changed later on.\n */\n constructor(helper, size) {\n /**\n * @private\n * @type {import(\"./Helper.js\").default}\n */\n this.helper_ = helper;\n const gl = helper.getGL();\n\n /**\n * @private\n * @type {WebGLTexture}\n */\n this.texture_ = gl.createTexture();\n\n /**\n * @private\n * @type {WebGLFramebuffer}\n */\n this.framebuffer_ = gl.createFramebuffer();\n\n /**\n * @type {Array}\n * @private\n */\n this.size_ = size || [1, 1];\n\n /**\n * @type {Uint8Array}\n * @private\n */\n this.data_ = new Uint8Array(0);\n\n /**\n * @type {boolean}\n * @private\n */\n this.dataCacheDirty_ = true;\n\n this.updateSize_();\n }\n\n /**\n * Changes the size of the render target texture. Note: will do nothing if the size\n * is already the same.\n * @param {Array} size Expected size of the render target texture\n * @api\n */\n setSize(size) {\n if (equals(size, this.size_)) {\n return;\n }\n this.size_[0] = size[0];\n this.size_[1] = size[1];\n this.updateSize_();\n }\n\n /**\n * Returns the size of the render target texture\n * @return {Array} Size of the render target texture\n * @api\n */\n getSize() {\n return this.size_;\n }\n\n /**\n * This will cause following calls to `#readAll` or `#readPixel` to download the content of the\n * render target into memory, which is an expensive operation.\n * This content will be kept in cache but should be cleared after each new render.\n * @api\n */\n clearCachedData() {\n this.dataCacheDirty_ = true;\n }\n\n /**\n * Returns the full content of the frame buffer as a series of r, g, b, a components\n * in the 0-255 range (unsigned byte).\n * @return {Uint8Array} Integer array of color values\n * @api\n */\n readAll() {\n if (this.dataCacheDirty_) {\n const size = this.size_;\n const gl = this.helper_.getGL();\n\n gl.bindFramebuffer(gl.FRAMEBUFFER, this.framebuffer_);\n gl.readPixels(\n 0,\n 0,\n size[0],\n size[1],\n gl.RGBA,\n gl.UNSIGNED_BYTE,\n this.data_\n );\n this.dataCacheDirty_ = false;\n }\n return this.data_;\n }\n\n /**\n * Reads one pixel of the frame buffer as an array of r, g, b, a components\n * in the 0-255 range (unsigned byte).\n * If x and/or y are outside of existing data, an array filled with 0 is returned.\n * @param {number} x Pixel coordinate\n * @param {number} y Pixel coordinate\n * @return {Uint8Array} Integer array with one color value (4 components)\n * @api\n */\n readPixel(x, y) {\n if (x < 0 || y < 0 || x > this.size_[0] || y >= this.size_[1]) {\n tmpArray4[0] = 0;\n tmpArray4[1] = 0;\n tmpArray4[2] = 0;\n tmpArray4[3] = 0;\n return tmpArray4;\n }\n\n this.readAll();\n const index =\n Math.floor(x) + (this.size_[1] - Math.floor(y) - 1) * this.size_[0];\n tmpArray4[0] = this.data_[index * 4];\n tmpArray4[1] = this.data_[index * 4 + 1];\n tmpArray4[2] = this.data_[index * 4 + 2];\n tmpArray4[3] = this.data_[index * 4 + 3];\n return tmpArray4;\n }\n\n /**\n * @return {WebGLTexture} Texture to render to\n */\n getTexture() {\n return this.texture_;\n }\n\n /**\n * @return {WebGLFramebuffer} Frame buffer of the render target\n */\n getFramebuffer() {\n return this.framebuffer_;\n }\n\n /**\n * @private\n */\n updateSize_() {\n const size = this.size_;\n const gl = this.helper_.getGL();\n\n this.texture_ = this.helper_.createTexture(size, null, this.texture_);\n\n gl.bindFramebuffer(gl.FRAMEBUFFER, this.framebuffer_);\n gl.viewport(0, 0, size[0], size[1]);\n gl.framebufferTexture2D(\n gl.FRAMEBUFFER,\n gl.COLOR_ATTACHMENT0,\n gl.TEXTURE_2D,\n this.texture_,\n 0\n );\n\n this.data_ = new Uint8Array(size[0] * size[1] * 4);\n }\n}\n\nexport default WebGLRenderTarget;\n","/**\n * @module ol/webgl/TileTexture\n */\n\nimport DataTile, {asArrayLike, asImageLike} from '../DataTile.js';\nimport EventTarget from '../events/Target.js';\nimport EventType from '../events/EventType.js';\nimport ImageTile from '../ImageTile.js';\nimport ReprojTile from '../reproj/Tile.js';\nimport TileState from '../TileState.js';\nimport WebGLArrayBuffer from './Buffer.js';\nimport {ARRAY_BUFFER, STATIC_DRAW} from '../webgl.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {toSize} from '../size.js';\n\n/**\n * @param {WebGLRenderingContext} gl The WebGL context.\n * @param {WebGLTexture} texture The texture.\n * @param {boolean} interpolate Interpolate when resampling.\n */\nfunction bindAndConfigure(gl, texture, interpolate) {\n const resampleFilter = interpolate ? gl.LINEAR : gl.NEAREST;\n gl.bindTexture(gl.TEXTURE_2D, texture);\n gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);\n gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);\n gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, resampleFilter);\n gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, resampleFilter);\n}\n\n/**\n * @param {WebGLRenderingContext} gl The WebGL context.\n * @param {WebGLTexture} texture The texture.\n * @param {import(\"../DataTile.js\").ImageLike} image The image.\n * @param {boolean} interpolate Interpolate when resampling.\n */\nfunction uploadImageTexture(gl, texture, image, interpolate) {\n bindAndConfigure(gl, texture, interpolate);\n\n gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, image);\n}\n\n/**\n * @param {import(\"./Helper.js\").default} helper The WebGL helper.\n * @param {WebGLTexture} texture The texture.\n * @param {import(\"../DataTile.js\").ArrayLike} data The pixel data.\n * @param {import(\"../size.js\").Size} size The pixel size.\n * @param {number} bandCount The band count.\n * @param {boolean} interpolate Interpolate when resampling.\n */\nfunction uploadDataTexture(\n helper,\n texture,\n data,\n size,\n bandCount,\n interpolate\n) {\n const gl = helper.getGL();\n let textureType;\n let canInterpolate;\n if (data instanceof Float32Array) {\n textureType = gl.FLOAT;\n helper.getExtension('OES_texture_float');\n const extension = helper.getExtension('OES_texture_float_linear');\n canInterpolate = extension !== null;\n } else {\n textureType = gl.UNSIGNED_BYTE;\n canInterpolate = true;\n }\n bindAndConfigure(gl, texture, interpolate && canInterpolate);\n\n const bytesPerRow = data.byteLength / size[1];\n let unpackAlignment = 1;\n if (bytesPerRow % 8 === 0) {\n unpackAlignment = 8;\n } else if (bytesPerRow % 4 === 0) {\n unpackAlignment = 4;\n } else if (bytesPerRow % 2 === 0) {\n unpackAlignment = 2;\n }\n\n let format;\n switch (bandCount) {\n case 1: {\n format = gl.LUMINANCE;\n break;\n }\n case 2: {\n format = gl.LUMINANCE_ALPHA;\n break;\n }\n case 3: {\n format = gl.RGB;\n break;\n }\n case 4: {\n format = gl.RGBA;\n break;\n }\n default: {\n throw new Error(`Unsupported number of bands: ${bandCount}`);\n }\n }\n\n const oldUnpackAlignment = gl.getParameter(gl.UNPACK_ALIGNMENT);\n gl.pixelStorei(gl.UNPACK_ALIGNMENT, unpackAlignment);\n gl.texImage2D(\n gl.TEXTURE_2D,\n 0,\n format,\n size[0],\n size[1],\n 0,\n format,\n textureType,\n data\n );\n gl.pixelStorei(gl.UNPACK_ALIGNMENT, oldUnpackAlignment);\n}\n\n/**\n * @type {CanvasRenderingContext2D}\n */\nlet pixelContext = null;\n\nfunction createPixelContext() {\n pixelContext = createCanvasContext2D(1, 1, undefined, {\n willReadFrequently: true,\n });\n}\n\n/**\n * @typedef {import(\"../DataTile.js\").default|ImageTile|ReprojTile} TileType\n */\n\n/**\n * @typedef {Object} Options\n * @property {TileType} tile The tile.\n * @property {import(\"../tilegrid/TileGrid.js\").default} grid Tile grid.\n * @property {import(\"../webgl/Helper.js\").default} helper WebGL helper.\n * @property {number} [gutter=0] The size in pixels of the gutter around image tiles to ignore.\n */\n\nclass TileTexture extends EventTarget {\n /**\n * @param {Options} options The tile texture options.\n */\n constructor(options) {\n super();\n\n /**\n * @type {TileType}\n */\n this.tile;\n\n /**\n * @type {Array}\n */\n this.textures = [];\n this.handleTileChange_ = this.handleTileChange_.bind(this);\n\n /**\n * @type {import(\"../size.js\").Size}\n * @private\n */\n this.renderSize_ = toSize(\n options.grid.getTileSize(options.tile.tileCoord[0])\n );\n\n /**\n * @type {number}\n * @private\n */\n this.gutter_ = options.gutter || 0;\n\n /**\n * @type {number}\n */\n this.bandCount = NaN;\n\n /**\n * @type {import(\"../webgl/Helper.js\").default}\n * @private\n */\n this.helper_ = options.helper;\n\n const coords = new WebGLArrayBuffer(ARRAY_BUFFER, STATIC_DRAW);\n coords.fromArray([\n 0, // P0\n 1,\n 1, // P1\n 1,\n 1, // P2\n 0,\n 0, // P3\n 0,\n ]);\n this.helper_.flushBufferData(coords);\n\n /**\n * @type {WebGLArrayBuffer}\n */\n this.coords = coords;\n\n this.setTile(options.tile);\n }\n\n /**\n * @param {TileType} tile Tile.\n */\n setTile(tile) {\n if (tile !== this.tile) {\n if (this.tile) {\n this.tile.removeEventListener(EventType.CHANGE, this.handleTileChange_);\n }\n this.tile = tile;\n this.textures.length = 0;\n this.loaded = tile.getState() === TileState.LOADED;\n if (this.loaded) {\n this.uploadTile_();\n } else {\n if (tile instanceof ImageTile) {\n const image = tile.getImage();\n if (image instanceof Image && !image.crossOrigin) {\n image.crossOrigin = 'anonymous';\n }\n }\n tile.addEventListener(EventType.CHANGE, this.handleTileChange_);\n }\n }\n }\n\n uploadTile_() {\n const helper = this.helper_;\n const gl = helper.getGL();\n const tile = this.tile;\n\n /**\n * @type {import(\"../DataTile.js\").Data}\n */\n let data;\n\n if (tile instanceof ImageTile || tile instanceof ReprojTile) {\n data = tile.getImage();\n } else {\n data = tile.getData();\n }\n\n const image = asImageLike(data);\n if (image) {\n const texture = gl.createTexture();\n this.textures.push(texture);\n this.bandCount = 4;\n uploadImageTexture(gl, texture, image, tile.interpolate);\n return;\n }\n\n data = asArrayLike(data);\n\n const sourceTileSize = /** @type {DataTile} */ (tile).getSize();\n const pixelSize = [\n sourceTileSize[0] + 2 * this.gutter_,\n sourceTileSize[1] + 2 * this.gutter_,\n ];\n const isFloat = data instanceof Float32Array;\n const pixelCount = pixelSize[0] * pixelSize[1];\n const DataType = isFloat ? Float32Array : Uint8Array;\n const bytesPerElement = DataType.BYTES_PER_ELEMENT;\n const bytesPerRow = data.byteLength / pixelSize[1];\n\n this.bandCount = Math.floor(bytesPerRow / bytesPerElement / pixelSize[0]);\n const textureCount = Math.ceil(this.bandCount / 4);\n\n if (textureCount === 1) {\n const texture = gl.createTexture();\n this.textures.push(texture);\n uploadDataTexture(\n helper,\n texture,\n data,\n pixelSize,\n this.bandCount,\n tile.interpolate\n );\n return;\n }\n\n const textureDataArrays = new Array(textureCount);\n for (let textureIndex = 0; textureIndex < textureCount; ++textureIndex) {\n const texture = gl.createTexture();\n this.textures.push(texture);\n\n const bandCount =\n textureIndex < textureCount - 1 ? 4 : ((this.bandCount - 1) % 4) + 1;\n textureDataArrays[textureIndex] = new DataType(pixelCount * bandCount);\n }\n\n let dataIndex = 0;\n let rowOffset = 0;\n const colCount = pixelSize[0] * this.bandCount;\n for (let rowIndex = 0; rowIndex < pixelSize[1]; ++rowIndex) {\n for (let colIndex = 0; colIndex < colCount; ++colIndex) {\n const dataValue = data[rowOffset + colIndex];\n\n const pixelIndex = Math.floor(dataIndex / this.bandCount);\n const bandIndex = colIndex % this.bandCount;\n const textureIndex = Math.floor(bandIndex / 4);\n const textureData = textureDataArrays[textureIndex];\n const bandCount = textureData.length / pixelCount;\n const textureBandIndex = bandIndex % 4;\n textureData[pixelIndex * bandCount + textureBandIndex] = dataValue;\n\n ++dataIndex;\n }\n rowOffset += bytesPerRow / bytesPerElement;\n }\n\n for (let textureIndex = 0; textureIndex < textureCount; ++textureIndex) {\n const texture = this.textures[textureIndex];\n const textureData = textureDataArrays[textureIndex];\n const bandCount = textureData.length / pixelCount;\n uploadDataTexture(\n helper,\n texture,\n textureData,\n pixelSize,\n bandCount,\n tile.interpolate\n );\n }\n }\n\n handleTileChange_() {\n if (this.tile.getState() === TileState.LOADED) {\n this.loaded = true;\n this.uploadTile_();\n this.dispatchEvent(EventType.CHANGE);\n }\n }\n\n disposeInternal() {\n const gl = this.helper_.getGL();\n this.helper_.deleteBuffer(this.coords);\n for (let i = 0; i < this.textures.length; ++i) {\n gl.deleteTexture(this.textures[i]);\n }\n this.tile.removeEventListener(EventType.CHANGE, this.handleTileChange_);\n }\n\n /**\n * @param {import(\"../DataTile.js\").ImageLike} image The image.\n * @param {number} renderCol The column index (in rendered tile space).\n * @param {number} renderRow The row index (in rendered tile space).\n * @return {Uint8ClampedArray|null} The data.\n * @private\n */\n getImagePixelData_(image, renderCol, renderRow) {\n const gutter = this.gutter_;\n const renderWidth = this.renderSize_[0];\n const renderHeight = this.renderSize_[1];\n\n if (!pixelContext) {\n createPixelContext();\n }\n pixelContext.clearRect(0, 0, 1, 1);\n\n const sourceWidth = image.width;\n const sourceHeight = image.height;\n\n const sourceWidthWithoutGutter = sourceWidth - 2 * gutter;\n const sourceHeightWithoutGutter = sourceHeight - 2 * gutter;\n\n const sourceCol =\n gutter + Math.floor(sourceWidthWithoutGutter * (renderCol / renderWidth));\n\n const sourceRow =\n gutter +\n Math.floor(sourceHeightWithoutGutter * (renderRow / renderHeight));\n\n let data;\n try {\n pixelContext.drawImage(image, sourceCol, sourceRow, 1, 1, 0, 0, 1, 1);\n data = pixelContext.getImageData(0, 0, 1, 1).data;\n } catch (err) {\n pixelContext = null;\n return null;\n }\n return data;\n }\n\n /**\n * @param {import(\"../DataTile.js\").ArrayLike} data The data.\n * @param {import(\"../size.js\").Size} sourceSize The size.\n * @param {number} renderCol The column index (in rendered tile space).\n * @param {number} renderRow The row index (in rendered tile space).\n * @return {import(\"../DataTile.js\").ArrayLike|null} The data.\n * @private\n */\n getArrayPixelData_(data, sourceSize, renderCol, renderRow) {\n const gutter = this.gutter_;\n const renderWidth = this.renderSize_[0];\n const renderHeight = this.renderSize_[1];\n\n const sourceWidthWithoutGutter = sourceSize[0];\n const sourceHeightWithoutGutter = sourceSize[1];\n const sourceWidth = sourceWidthWithoutGutter + 2 * gutter;\n const sourceHeight = sourceHeightWithoutGutter + 2 * gutter;\n\n const sourceCol =\n gutter + Math.floor(sourceWidthWithoutGutter * (renderCol / renderWidth));\n\n const sourceRow =\n gutter +\n Math.floor(sourceHeightWithoutGutter * (renderRow / renderHeight));\n\n if (data instanceof DataView) {\n const bytesPerPixel = data.byteLength / (sourceWidth * sourceHeight);\n const offset = bytesPerPixel * (sourceRow * sourceWidth + sourceCol);\n const buffer = data.buffer.slice(offset, offset + bytesPerPixel);\n return new DataView(buffer);\n }\n\n const offset = this.bandCount * (sourceRow * sourceWidth + sourceCol);\n return data.slice(offset, offset + this.bandCount);\n }\n\n /**\n * Get data for a pixel. If the tile is not loaded, null is returned.\n * @param {number} renderCol The column index (in rendered tile space).\n * @param {number} renderRow The row index (in rendered tile space).\n * @return {import(\"../DataTile.js\").ArrayLike|null} The data.\n */\n getPixelData(renderCol, renderRow) {\n if (!this.loaded) {\n return null;\n }\n\n if (this.tile instanceof DataTile) {\n const data = this.tile.getData();\n const arrayData = asArrayLike(data);\n if (arrayData) {\n const sourceSize = this.tile.getSize();\n return this.getArrayPixelData_(\n arrayData,\n sourceSize,\n renderCol,\n renderRow\n );\n }\n return this.getImagePixelData_(asImageLike(data), renderCol, renderRow);\n }\n\n return this.getImagePixelData_(this.tile.getImage(), renderCol, renderRow);\n }\n}\n\nexport default TileTexture;\n","/**\n * @module ol/renderer/webgl/Layer\n */\nimport LayerProperty from '../../layer/Property.js';\nimport LayerRenderer from '../Layer.js';\nimport RenderEvent from '../../render/Event.js';\nimport RenderEventType from '../../render/EventType.js';\nimport WebGLHelper from '../../webgl/Helper.js';\nimport {\n compose as composeTransform,\n create as createTransform,\n} from '../../transform.js';\n\n/**\n * @typedef {Object} PostProcessesOptions\n * @property {number} [scaleRatio] Scale ratio; if < 1, the post process will render to a texture smaller than\n * the main canvas that will then be sampled up (useful for saving resource on blur steps).\n * @property {string} [vertexShader] Vertex shader source\n * @property {string} [fragmentShader] Fragment shader source\n * @property {Object} [uniforms] Uniform definitions for the post process step\n */\n\n/**\n * @typedef {Object} Options\n * @property {Object} [uniforms] Uniform definitions for the post process steps\n * @property {Array} [postProcesses] Post-processes definitions\n */\n\n/**\n * @classdesc\n * Base WebGL renderer class.\n * Holds all logic related to data manipulation & some common rendering logic\n * @template {import(\"../../layer/Layer.js\").default} LayerType\n * @extends {LayerRenderer}\n */\nclass WebGLLayerRenderer extends LayerRenderer {\n /**\n * @param {LayerType} layer Layer.\n * @param {Options} [options] Options.\n */\n constructor(layer, options) {\n super(layer);\n\n options = options || {};\n\n /**\n * The transform for viewport CSS pixels to rendered pixels. This transform is only\n * set before dispatching rendering events.\n * @private\n * @type {import(\"../../transform.js\").Transform}\n */\n this.inversePixelTransform_ = createTransform();\n\n /**\n * @private\n * @type {CanvasRenderingContext2D}\n */\n this.pixelContext_ = null;\n\n /**\n * @private\n */\n this.postProcesses_ = options.postProcesses;\n\n /**\n * @private\n */\n this.uniforms_ = options.uniforms;\n\n /**\n * @type {WebGLHelper}\n * @protected\n */\n this.helper;\n\n layer.addChangeListener(LayerProperty.MAP, this.removeHelper.bind(this));\n\n this.dispatchPreComposeEvent = this.dispatchPreComposeEvent.bind(this);\n this.dispatchPostComposeEvent = this.dispatchPostComposeEvent.bind(this);\n }\n\n /**\n * @param {WebGLRenderingContext} context The WebGL rendering context.\n * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n * @protected\n */\n dispatchPreComposeEvent(context, frameState) {\n const layer = this.getLayer();\n if (layer.hasListener(RenderEventType.PRECOMPOSE)) {\n const event = new RenderEvent(\n RenderEventType.PRECOMPOSE,\n undefined,\n frameState,\n context\n );\n layer.dispatchEvent(event);\n }\n }\n\n /**\n * @param {WebGLRenderingContext} context The WebGL rendering context.\n * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n * @protected\n */\n dispatchPostComposeEvent(context, frameState) {\n const layer = this.getLayer();\n if (layer.hasListener(RenderEventType.POSTCOMPOSE)) {\n const event = new RenderEvent(\n RenderEventType.POSTCOMPOSE,\n undefined,\n frameState,\n context\n );\n layer.dispatchEvent(event);\n }\n }\n\n /**\n * Reset options (only handles uniforms).\n * @param {Options} options Options.\n */\n reset(options) {\n this.uniforms_ = options.uniforms;\n if (this.helper) {\n this.helper.setUniforms(this.uniforms_);\n }\n }\n\n /**\n * @protected\n */\n removeHelper() {\n if (this.helper) {\n this.helper.dispose();\n delete this.helper;\n }\n }\n\n /**\n * Determine whether renderFrame should be called.\n * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n * @return {boolean} Layer is ready to be rendered.\n */\n prepareFrame(frameState) {\n if (this.getLayer().getRenderSource()) {\n let incrementGroup = true;\n let groupNumber = -1;\n let className;\n for (let i = 0, ii = frameState.layerStatesArray.length; i < ii; i++) {\n const layer = frameState.layerStatesArray[i].layer;\n const renderer = layer.getRenderer();\n if (!(renderer instanceof WebGLLayerRenderer)) {\n incrementGroup = true;\n continue;\n }\n const layerClassName = layer.getClassName();\n if (incrementGroup || layerClassName !== className) {\n groupNumber += 1;\n incrementGroup = false;\n }\n className = layerClassName;\n if (renderer === this) {\n break;\n }\n }\n\n const canvasCacheKey =\n 'map/' + frameState.mapId + '/group/' + groupNumber;\n\n if (!this.helper || !this.helper.canvasCacheKeyMatches(canvasCacheKey)) {\n this.removeHelper();\n\n this.helper = new WebGLHelper({\n postProcesses: this.postProcesses_,\n uniforms: this.uniforms_,\n canvasCacheKey: canvasCacheKey,\n });\n\n if (className) {\n this.helper.getCanvas().className = className;\n }\n\n this.afterHelperCreated();\n }\n }\n\n return this.prepareFrameInternal(frameState);\n }\n\n /**\n * @protected\n */\n afterHelperCreated() {}\n\n /**\n * Determine whether renderFrame should be called.\n * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n * @return {boolean} Layer is ready to be rendered.\n * @protected\n */\n prepareFrameInternal(frameState) {\n return true;\n }\n\n /**\n * Clean up.\n */\n disposeInternal() {\n this.removeHelper();\n super.disposeInternal();\n }\n\n /**\n * @param {import(\"../../render/EventType.js\").default} type Event type.\n * @param {WebGLRenderingContext} context The rendering context.\n * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n * @private\n */\n dispatchRenderEvent_(type, context, frameState) {\n const layer = this.getLayer();\n if (layer.hasListener(type)) {\n composeTransform(\n this.inversePixelTransform_,\n 0,\n 0,\n frameState.pixelRatio,\n -frameState.pixelRatio,\n 0,\n 0,\n -frameState.size[1]\n );\n\n const event = new RenderEvent(\n type,\n this.inversePixelTransform_,\n frameState,\n context\n );\n layer.dispatchEvent(event);\n }\n }\n\n /**\n * @param {WebGLRenderingContext} context The rendering context.\n * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n * @protected\n */\n preRender(context, frameState) {\n this.dispatchRenderEvent_(RenderEventType.PRERENDER, context, frameState);\n }\n\n /**\n * @param {WebGLRenderingContext} context The rendering context.\n * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n * @protected\n */\n postRender(context, frameState) {\n this.dispatchRenderEvent_(RenderEventType.POSTRENDER, context, frameState);\n }\n}\n\nexport default WebGLLayerRenderer;\n","/**\n * @module ol/renderer/webgl/TileLayer\n */\nimport LRUCache from '../../structs/LRUCache.js';\nimport ReprojDataTile from '../../reproj/DataTile.js';\nimport ReprojTile from '../../reproj/Tile.js';\nimport TileRange from '../../TileRange.js';\nimport TileState from '../../TileState.js';\nimport TileTexture from '../../webgl/TileTexture.js';\nimport WebGLArrayBuffer from '../../webgl/Buffer.js';\nimport WebGLLayerRenderer from './Layer.js';\nimport {AttributeType} from '../../webgl/Helper.js';\nimport {ELEMENT_ARRAY_BUFFER, STATIC_DRAW} from '../../webgl.js';\nimport {\n apply as applyTransform,\n create as createTransform,\n reset as resetTransform,\n rotate as rotateTransform,\n scale as scaleTransform,\n translate as translateTransform,\n} from '../../transform.js';\nimport {ascending} from '../../array.js';\nimport {\n boundingExtent,\n containsCoordinate,\n getIntersection,\n isEmpty,\n} from '../../extent.js';\nimport {\n create as createMat4,\n fromTransform as mat4FromTransform,\n} from '../../vec/mat4.js';\nimport {\n createOrUpdate as createTileCoord,\n getKey as getTileCoordKey,\n} from '../../tilecoord.js';\nimport {fromUserExtent} from '../../proj.js';\nimport {getUid} from '../../util.js';\nimport {toSize} from '../../size.js';\n\nexport const Uniforms = {\n TILE_TEXTURE_ARRAY: 'u_tileTextures',\n TILE_TRANSFORM: 'u_tileTransform',\n TRANSITION_ALPHA: 'u_transitionAlpha',\n DEPTH: 'u_depth',\n TEXTURE_PIXEL_WIDTH: 'u_texturePixelWidth',\n TEXTURE_PIXEL_HEIGHT: 'u_texturePixelHeight',\n TEXTURE_RESOLUTION: 'u_textureResolution', // map units per texture pixel\n TEXTURE_ORIGIN_X: 'u_textureOriginX', // map x coordinate of left edge of texture\n TEXTURE_ORIGIN_Y: 'u_textureOriginY', // map y coordinate of top edge of texture\n RENDER_EXTENT: 'u_renderExtent', // intersection of layer, source, and view extent\n RESOLUTION: 'u_resolution',\n ZOOM: 'u_zoom',\n};\n\nexport const Attributes = {\n TEXTURE_COORD: 'a_textureCoord',\n};\n\n/**\n * @type {Array}\n */\nconst attributeDescriptions = [\n {\n name: Attributes.TEXTURE_COORD,\n size: 2,\n type: AttributeType.FLOAT,\n },\n];\n\n/**\n * @type {Object}\n */\nconst empty = {};\n\n/**\n * Transform a zoom level into a depth value ranging from -1 to 1.\n * @param {number} z A zoom level.\n * @return {number} A depth value.\n */\nfunction depthForZ(z) {\n return 2 * (1 - 1 / (z + 1)) - 1;\n}\n\n/**\n * Add a tile texture to the lookup.\n * @param {Object>} tileTexturesByZ Lookup of\n * tile textures by zoom level.\n * @param {import(\"../../webgl/TileTexture.js\").default} tileTexture A tile texture.\n * @param {number} z The zoom level.\n */\nfunction addTileTextureToLookup(tileTexturesByZ, tileTexture, z) {\n if (!(z in tileTexturesByZ)) {\n tileTexturesByZ[z] = [];\n }\n tileTexturesByZ[z].push(tileTexture);\n}\n\n/**\n * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n * @param {import(\"../../extent.js\").Extent} extent The frame extent.\n * @return {import(\"../../extent.js\").Extent} Frame extent intersected with layer extents.\n */\nfunction getRenderExtent(frameState, extent) {\n const layerState = frameState.layerStatesArray[frameState.layerIndex];\n if (layerState.extent) {\n extent = getIntersection(\n extent,\n fromUserExtent(layerState.extent, frameState.viewState.projection)\n );\n }\n const source = /** @type {import(\"../../source/Tile.js\").default} */ (\n layerState.layer.getRenderSource()\n );\n if (!source.getWrapX()) {\n const gridExtent = source\n .getTileGridForProjection(frameState.viewState.projection)\n .getExtent();\n if (gridExtent) {\n extent = getIntersection(extent, gridExtent);\n }\n }\n return extent;\n}\n\nfunction getCacheKey(source, tileCoord) {\n return `${source.getKey()},${getTileCoordKey(tileCoord)}`;\n}\n\n/**\n * @typedef {Object} Options\n * @property {string} vertexShader Vertex shader source.\n * @property {string} fragmentShader Fragment shader source.\n * @property {Object} [uniforms] Additional uniforms\n * made available to shaders.\n * @property {Array} [paletteTextures] Palette textures.\n * @property {number} [cacheSize=512] The texture cache size.\n */\n\n/**\n * @typedef {import(\"../../layer/WebGLTile.js\").default} LayerType\n */\n\n/**\n * @classdesc\n * WebGL renderer for tile layers.\n * @extends {WebGLLayerRenderer}\n * @api\n */\nclass WebGLTileLayerRenderer extends WebGLLayerRenderer {\n /**\n * @param {LayerType} tileLayer Tile layer.\n * @param {Options} options Options.\n */\n constructor(tileLayer, options) {\n super(tileLayer, {\n uniforms: options.uniforms,\n });\n\n /**\n * The last call to `renderFrame` was completed with all tiles loaded\n * @type {boolean}\n */\n this.renderComplete = false;\n\n /**\n * This transform converts texture coordinates to screen coordinates.\n * @type {import(\"../../transform.js\").Transform}\n * @private\n */\n this.tileTransform_ = createTransform();\n\n /**\n * @type {Array}\n * @private\n */\n this.tempMat4_ = createMat4();\n\n /**\n * @type {import(\"../../TileRange.js\").default}\n * @private\n */\n this.tempTileRange_ = new TileRange(0, 0, 0, 0);\n\n /**\n * @type {import(\"../../tilecoord.js\").TileCoord}\n * @private\n */\n this.tempTileCoord_ = createTileCoord(0, 0, 0);\n\n /**\n * @type {import(\"../../size.js\").Size}\n * @private\n */\n this.tempSize_ = [0, 0];\n\n /**\n * @type {WebGLProgram}\n * @private\n */\n this.program_;\n\n /**\n * @private\n */\n this.vertexShader_ = options.vertexShader;\n\n /**\n * @private\n */\n this.fragmentShader_ = options.fragmentShader;\n\n /**\n * Tiles are rendered as a quad with the following structure:\n *\n * [P3]---------[P2]\n * |` |\n * | ` B |\n * | ` |\n * | ` |\n * | A ` |\n * | ` |\n * [P0]---------[P1]\n *\n * Triangle A: P0, P1, P3\n * Triangle B: P1, P2, P3\n *\n * @private\n */\n this.indices_ = new WebGLArrayBuffer(ELEMENT_ARRAY_BUFFER, STATIC_DRAW);\n this.indices_.fromArray([0, 1, 3, 1, 2, 3]);\n\n const cacheSize = options.cacheSize !== undefined ? options.cacheSize : 512;\n\n /**\n * @type {import(\"../../structs/LRUCache.js\").default}\n * @private\n */\n this.tileTextureCache_ = new LRUCache(cacheSize);\n\n /**\n * @type {Array}\n * @private\n */\n this.paletteTextures_ = options.paletteTextures || [];\n\n /**\n * @private\n * @type {import(\"../../Map.js\").FrameState|null}\n */\n this.frameState_ = null;\n\n /**\n * @private\n * @type {import(\"../../proj/Projection.js\").default}\n */\n this.projection_ = undefined;\n }\n\n /**\n * @param {Options} options Options.\n */\n reset(options) {\n super.reset({\n uniforms: options.uniforms,\n });\n this.vertexShader_ = options.vertexShader;\n this.fragmentShader_ = options.fragmentShader;\n this.paletteTextures_ = options.paletteTextures || [];\n\n if (this.helper) {\n this.program_ = this.helper.getProgram(\n this.fragmentShader_,\n this.vertexShader_\n );\n }\n }\n\n afterHelperCreated() {\n this.program_ = this.helper.getProgram(\n this.fragmentShader_,\n this.vertexShader_\n );\n\n this.helper.flushBufferData(this.indices_);\n }\n\n /**\n * @param {import(\"../../webgl/TileTexture\").TileType} tile Tile.\n * @return {boolean} Tile is drawable.\n * @private\n */\n isDrawableTile_(tile) {\n const tileLayer = this.getLayer();\n const tileState = tile.getState();\n const useInterimTilesOnError = tileLayer.getUseInterimTilesOnError();\n return (\n tileState == TileState.LOADED ||\n tileState == TileState.EMPTY ||\n (tileState == TileState.ERROR && !useInterimTilesOnError)\n );\n }\n\n /**\n * Determine whether renderFrame should be called.\n * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n * @return {boolean} Layer is ready to be rendered.\n */\n prepareFrameInternal(frameState) {\n if (!this.projection_) {\n this.projection_ = frameState.viewState.projection;\n } else if (frameState.viewState.projection !== this.projection_) {\n this.clearCache();\n this.projection_ = frameState.viewState.projection;\n }\n\n const layer = this.getLayer();\n const source = layer.getRenderSource();\n if (!source) {\n return false;\n }\n\n if (isEmpty(getRenderExtent(frameState, frameState.extent))) {\n return false;\n }\n return source.getState() === 'ready';\n }\n\n /**\n * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n * @param {import(\"../../extent.js\").Extent} extent The extent to be rendered.\n * @param {number} initialZ The zoom level.\n * @param {Object>} tileTexturesByZ The zoom level.\n * @param {number} preload Number of additional levels to load.\n */\n enqueueTiles(frameState, extent, initialZ, tileTexturesByZ, preload) {\n const viewState = frameState.viewState;\n const tileLayer = this.getLayer();\n const tileSource = tileLayer.getRenderSource();\n const tileGrid = tileSource.getTileGridForProjection(viewState.projection);\n const gutter = tileSource.getGutterForProjection(viewState.projection);\n\n const tileSourceKey = getUid(tileSource);\n if (!(tileSourceKey in frameState.wantedTiles)) {\n frameState.wantedTiles[tileSourceKey] = {};\n }\n\n const wantedTiles = frameState.wantedTiles[tileSourceKey];\n const tileTextureCache = this.tileTextureCache_;\n\n const map = tileLayer.getMapInternal();\n const minZ = Math.max(\n initialZ - preload,\n tileGrid.getMinZoom(),\n tileGrid.getZForResolution(\n Math.min(\n tileLayer.getMaxResolution(),\n map\n ? map\n .getView()\n .getResolutionForZoom(Math.max(tileLayer.getMinZoom(), 0))\n : tileGrid.getResolution(0)\n ),\n tileSource.zDirection\n )\n );\n for (let z = initialZ; z >= minZ; --z) {\n const tileRange = tileGrid.getTileRangeForExtentAndZ(\n extent,\n z,\n this.tempTileRange_\n );\n\n const tileResolution = tileGrid.getResolution(z);\n\n for (let x = tileRange.minX; x <= tileRange.maxX; ++x) {\n for (let y = tileRange.minY; y <= tileRange.maxY; ++y) {\n const tileCoord = createTileCoord(z, x, y, this.tempTileCoord_);\n const cacheKey = getCacheKey(tileSource, tileCoord);\n\n /** @type {TileTexture} */\n let tileTexture;\n\n /** @type {import(\"../../webgl/TileTexture\").TileType} */\n let tile;\n\n if (tileTextureCache.containsKey(cacheKey)) {\n tileTexture = tileTextureCache.get(cacheKey);\n tile = tileTexture.tile;\n }\n if (!tileTexture || tileTexture.tile.key !== tileSource.getKey()) {\n tile = tileSource.getTile(\n z,\n x,\n y,\n frameState.pixelRatio,\n viewState.projection\n );\n if (!tileTexture) {\n tileTexture = new TileTexture({\n tile: tile,\n grid: tileGrid,\n helper: this.helper,\n gutter: gutter,\n });\n tileTextureCache.set(cacheKey, tileTexture);\n } else {\n if (this.isDrawableTile_(tile)) {\n tileTexture.setTile(tile);\n } else {\n const interimTile =\n /** @type {import(\"../../webgl/TileTexture\").TileType} */ (\n tile.getInterimTile()\n );\n tileTexture.setTile(interimTile);\n }\n }\n }\n\n addTileTextureToLookup(tileTexturesByZ, tileTexture, z);\n\n const tileQueueKey = tile.getKey();\n wantedTiles[tileQueueKey] = true;\n\n if (tile.getState() === TileState.IDLE) {\n if (!frameState.tileQueue.isKeyQueued(tileQueueKey)) {\n frameState.tileQueue.enqueue([\n tile,\n tileSourceKey,\n tileGrid.getTileCoordCenter(tileCoord),\n tileResolution,\n ]);\n }\n }\n }\n }\n }\n }\n\n /**\n * Render the layer.\n * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n * @return {HTMLElement} The rendered element.\n */\n renderFrame(frameState) {\n this.frameState_ = frameState;\n this.renderComplete = true;\n const gl = this.helper.getGL();\n this.preRender(gl, frameState);\n\n const viewState = frameState.viewState;\n const tileLayer = this.getLayer();\n const tileSource = tileLayer.getRenderSource();\n const tileGrid = tileSource.getTileGridForProjection(viewState.projection);\n const gutter = tileSource.getGutterForProjection(viewState.projection);\n const extent = getRenderExtent(frameState, frameState.extent);\n const z = tileGrid.getZForResolution(\n viewState.resolution,\n tileSource.zDirection\n );\n\n /**\n * @type {Object>}\n */\n const tileTexturesByZ = {};\n\n const preload = tileLayer.getPreload();\n if (frameState.nextExtent) {\n const targetZ = tileGrid.getZForResolution(\n viewState.nextResolution,\n tileSource.zDirection\n );\n const nextExtent = getRenderExtent(frameState, frameState.nextExtent);\n this.enqueueTiles(\n frameState,\n nextExtent,\n targetZ,\n tileTexturesByZ,\n preload\n );\n }\n\n this.enqueueTiles(frameState, extent, z, tileTexturesByZ, 0);\n if (preload > 0) {\n setTimeout(() => {\n this.enqueueTiles(\n frameState,\n extent,\n z - 1,\n tileTexturesByZ,\n preload - 1\n );\n }, 0);\n }\n\n /**\n * A lookup of alpha values for tiles at the target rendering resolution\n * for tiles that are in transition. If a tile coord key is absent from\n * this lookup, the tile should be rendered at alpha 1.\n * @type {Object}\n */\n const alphaLookup = {};\n\n const uid = getUid(this);\n const time = frameState.time;\n let blend = false;\n\n // look for cached tiles to use if a target tile is not ready\n const tileTextures = tileTexturesByZ[z];\n for (let i = 0, ii = tileTextures.length; i < ii; ++i) {\n const tileTexture = tileTextures[i];\n const tile = tileTexture.tile;\n if (\n (tile instanceof ReprojTile || tile instanceof ReprojDataTile) &&\n tile.getState() === TileState.EMPTY\n ) {\n continue;\n }\n const tileCoord = tile.tileCoord;\n\n if (tileTexture.loaded) {\n const alpha = tile.getAlpha(uid, time);\n if (alpha === 1) {\n // no need to look for alt tiles\n tile.endTransition(uid);\n continue;\n }\n blend = true;\n const tileCoordKey = getTileCoordKey(tileCoord);\n alphaLookup[tileCoordKey] = alpha;\n }\n this.renderComplete = false;\n\n // first look for child tiles (at z + 1)\n const coveredByChildren = this.findAltTiles_(\n tileGrid,\n tileCoord,\n z + 1,\n tileTexturesByZ\n );\n\n if (coveredByChildren) {\n continue;\n }\n\n // next look for parent tiles\n const minZoom = tileGrid.getMinZoom();\n for (let parentZ = z - 1; parentZ >= minZoom; --parentZ) {\n const coveredByParent = this.findAltTiles_(\n tileGrid,\n tileCoord,\n parentZ,\n tileTexturesByZ\n );\n\n if (coveredByParent) {\n break;\n }\n }\n }\n\n this.helper.useProgram(this.program_, frameState);\n this.helper.prepareDraw(frameState, !blend);\n\n const zs = Object.keys(tileTexturesByZ).map(Number).sort(ascending);\n\n const centerX = viewState.center[0];\n const centerY = viewState.center[1];\n\n for (let j = 0, jj = zs.length; j < jj; ++j) {\n const tileZ = zs[j];\n const tileResolution = tileGrid.getResolution(tileZ);\n const tileSize = toSize(tileGrid.getTileSize(tileZ), this.tempSize_);\n const tileOrigin = tileGrid.getOrigin(tileZ);\n\n const tileWidthWithGutter = tileSize[0] + 2 * gutter;\n const tileHeightWithGutter = tileSize[1] + 2 * gutter;\n const aspectRatio = tileWidthWithGutter / tileHeightWithGutter;\n\n const centerI =\n (centerX - tileOrigin[0]) / (tileSize[0] * tileResolution);\n const centerJ =\n (tileOrigin[1] - centerY) / (tileSize[1] * tileResolution);\n\n const tileScale = viewState.resolution / tileResolution;\n\n const depth = depthForZ(tileZ);\n const tileTextures = tileTexturesByZ[tileZ];\n for (let i = 0, ii = tileTextures.length; i < ii; ++i) {\n const tileTexture = tileTextures[i];\n if (!tileTexture.loaded) {\n continue;\n }\n const tile = tileTexture.tile;\n const tileCoord = tile.tileCoord;\n const tileCoordKey = getTileCoordKey(tileCoord);\n\n const tileCenterI = tileCoord[1];\n const tileCenterJ = tileCoord[2];\n\n resetTransform(this.tileTransform_);\n scaleTransform(\n this.tileTransform_,\n 2 / ((frameState.size[0] * tileScale) / tileWidthWithGutter),\n -2 / ((frameState.size[1] * tileScale) / tileWidthWithGutter)\n );\n rotateTransform(this.tileTransform_, viewState.rotation);\n scaleTransform(this.tileTransform_, 1, 1 / aspectRatio);\n translateTransform(\n this.tileTransform_,\n (tileSize[0] * (tileCenterI - centerI) - gutter) /\n tileWidthWithGutter,\n (tileSize[1] * (tileCenterJ - centerJ) - gutter) /\n tileHeightWithGutter\n );\n\n this.helper.setUniformMatrixValue(\n Uniforms.TILE_TRANSFORM,\n mat4FromTransform(this.tempMat4_, this.tileTransform_)\n );\n\n this.helper.bindBuffer(tileTexture.coords);\n this.helper.bindBuffer(this.indices_);\n this.helper.enableAttributes(attributeDescriptions);\n\n let textureSlot = 0;\n while (textureSlot < tileTexture.textures.length) {\n const textureProperty = 'TEXTURE' + textureSlot;\n const uniformName = `${Uniforms.TILE_TEXTURE_ARRAY}[${textureSlot}]`;\n gl.activeTexture(gl[textureProperty]);\n gl.bindTexture(gl.TEXTURE_2D, tileTexture.textures[textureSlot]);\n gl.uniform1i(\n this.helper.getUniformLocation(uniformName),\n textureSlot\n );\n ++textureSlot;\n }\n\n for (\n let paletteIndex = 0;\n paletteIndex < this.paletteTextures_.length;\n ++paletteIndex\n ) {\n const paletteTexture = this.paletteTextures_[paletteIndex];\n gl.activeTexture(gl['TEXTURE' + textureSlot]);\n const texture = paletteTexture.getTexture(gl);\n gl.bindTexture(gl.TEXTURE_2D, texture);\n gl.uniform1i(\n this.helper.getUniformLocation(paletteTexture.name),\n textureSlot\n );\n ++textureSlot;\n }\n\n const alpha =\n tileCoordKey in alphaLookup ? alphaLookup[tileCoordKey] : 1;\n\n if (alpha < 1) {\n frameState.animate = true;\n }\n\n this.helper.setUniformFloatValue(Uniforms.TRANSITION_ALPHA, alpha);\n this.helper.setUniformFloatValue(Uniforms.DEPTH, depth);\n this.helper.setUniformFloatValue(\n Uniforms.TEXTURE_PIXEL_WIDTH,\n tileWidthWithGutter\n );\n this.helper.setUniformFloatValue(\n Uniforms.TEXTURE_PIXEL_HEIGHT,\n tileHeightWithGutter\n );\n this.helper.setUniformFloatValue(\n Uniforms.TEXTURE_RESOLUTION,\n tileResolution\n );\n this.helper.setUniformFloatValue(\n Uniforms.TEXTURE_ORIGIN_X,\n tileOrigin[0] +\n tileCenterI * tileSize[0] * tileResolution -\n gutter * tileResolution\n );\n this.helper.setUniformFloatValue(\n Uniforms.TEXTURE_ORIGIN_Y,\n tileOrigin[1] -\n tileCenterJ * tileSize[1] * tileResolution +\n gutter * tileResolution\n );\n let gutterExtent = extent;\n if (gutter > 0) {\n gutterExtent = tileGrid.getTileCoordExtent(tileCoord);\n getIntersection(gutterExtent, extent, gutterExtent);\n }\n this.helper.setUniformFloatVec4(Uniforms.RENDER_EXTENT, gutterExtent);\n this.helper.setUniformFloatValue(\n Uniforms.RESOLUTION,\n viewState.resolution\n );\n this.helper.setUniformFloatValue(Uniforms.ZOOM, viewState.zoom);\n\n this.helper.drawElements(0, this.indices_.getSize());\n }\n }\n\n this.helper.finalizeDraw(\n frameState,\n this.dispatchPreComposeEvent,\n this.dispatchPostComposeEvent\n );\n\n const canvas = this.helper.getCanvas();\n\n const tileTextureCache = this.tileTextureCache_;\n while (tileTextureCache.canExpireCache()) {\n const tileTexture = tileTextureCache.pop();\n tileTexture.dispose();\n }\n\n // TODO: let the renderers manage their own cache instead of managing the source cache\n /**\n * Here we unconditionally expire the source cache since the renderer maintains\n * its own cache.\n * @param {import(\"../../Map.js\").default} map Map.\n * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n */\n const postRenderFunction = function (map, frameState) {\n tileSource.updateCacheSize(0.1, frameState.viewState.projection);\n tileSource.expireCache(frameState.viewState.projection, empty);\n };\n\n frameState.postRenderFunctions.push(postRenderFunction);\n\n this.postRender(gl, frameState);\n return canvas;\n }\n\n /**\n * @param {import(\"../../pixel.js\").Pixel} pixel Pixel.\n * @return {Uint8ClampedArray|Uint8Array|Float32Array|DataView} Data at the pixel location.\n */\n getData(pixel) {\n const gl = this.helper.getGL();\n if (!gl) {\n return null;\n }\n\n const frameState = this.frameState_;\n if (!frameState) {\n return null;\n }\n\n const layer = this.getLayer();\n const coordinate = applyTransform(\n frameState.pixelToCoordinateTransform,\n pixel.slice()\n );\n\n const viewState = frameState.viewState;\n const layerExtent = layer.getExtent();\n if (layerExtent) {\n if (\n !containsCoordinate(\n fromUserExtent(layerExtent, viewState.projection),\n coordinate\n )\n ) {\n return null;\n }\n }\n\n // determine last source suitable for rendering at coordinate\n const sources = layer.getSources(\n boundingExtent([coordinate]),\n viewState.resolution\n );\n let i, source, tileGrid;\n for (i = sources.length - 1; i >= 0; --i) {\n source = sources[i];\n if (source.getState() === 'ready') {\n tileGrid = source.getTileGridForProjection(viewState.projection);\n if (source.getWrapX()) {\n break;\n }\n const gridExtent = tileGrid.getExtent();\n if (!gridExtent || containsCoordinate(gridExtent, coordinate)) {\n break;\n }\n }\n }\n if (i < 0) {\n return null;\n }\n\n const tileTextureCache = this.tileTextureCache_;\n for (\n let z = tileGrid.getZForResolution(viewState.resolution);\n z >= tileGrid.getMinZoom();\n --z\n ) {\n const tileCoord = tileGrid.getTileCoordForCoordAndZ(coordinate, z);\n const cacheKey = getCacheKey(source, tileCoord);\n if (!tileTextureCache.containsKey(cacheKey)) {\n continue;\n }\n const tileTexture = tileTextureCache.get(cacheKey);\n const tile = tileTexture.tile;\n if (\n (tile instanceof ReprojTile || tile instanceof ReprojDataTile) &&\n tile.getState() === TileState.EMPTY\n ) {\n return null;\n }\n if (!tileTexture.loaded) {\n continue;\n }\n const tileOrigin = tileGrid.getOrigin(z);\n const tileSize = toSize(tileGrid.getTileSize(z));\n const tileResolution = tileGrid.getResolution(z);\n\n const col =\n (coordinate[0] - tileOrigin[0]) / tileResolution -\n tileCoord[1] * tileSize[0];\n\n const row =\n (tileOrigin[1] - coordinate[1]) / tileResolution -\n tileCoord[2] * tileSize[1];\n\n return tileTexture.getPixelData(col, row);\n }\n return null;\n }\n\n /**\n * Look for tiles covering the provided tile coordinate at an alternate\n * zoom level. Loaded tiles will be added to the provided tile texture lookup.\n * @param {import(\"../../tilegrid/TileGrid.js\").default} tileGrid The tile grid.\n * @param {import(\"../../tilecoord.js\").TileCoord} tileCoord The target tile coordinate.\n * @param {number} altZ The alternate zoom level.\n * @param {Object>} tileTexturesByZ Lookup of\n * tile textures by zoom level.\n * @return {boolean} The tile coordinate is covered by loaded tiles at the alternate zoom level.\n * @private\n */\n findAltTiles_(tileGrid, tileCoord, altZ, tileTexturesByZ) {\n const tileRange = tileGrid.getTileRangeForTileCoordAndZ(\n tileCoord,\n altZ,\n this.tempTileRange_\n );\n\n if (!tileRange) {\n return false;\n }\n\n let covered = true;\n const tileTextureCache = this.tileTextureCache_;\n const source = this.getLayer().getRenderSource();\n for (let x = tileRange.minX; x <= tileRange.maxX; ++x) {\n for (let y = tileRange.minY; y <= tileRange.maxY; ++y) {\n const cacheKey = getCacheKey(source, [altZ, x, y]);\n let loaded = false;\n if (tileTextureCache.containsKey(cacheKey)) {\n const tileTexture = tileTextureCache.get(cacheKey);\n if (tileTexture.loaded) {\n addTileTextureToLookup(tileTexturesByZ, tileTexture, altZ);\n loaded = true;\n }\n }\n if (!loaded) {\n covered = false;\n }\n }\n }\n return covered;\n }\n\n clearCache() {\n const tileTextureCache = this.tileTextureCache_;\n tileTextureCache.forEach((tileTexture) => tileTexture.dispose());\n tileTextureCache.clear();\n }\n\n removeHelper() {\n if (this.helper) {\n this.clearCache();\n }\n\n super.removeHelper();\n }\n\n /**\n * Clean up.\n */\n disposeInternal() {\n const helper = this.helper;\n if (helper) {\n const gl = helper.getGL();\n gl.deleteProgram(this.program_);\n delete this.program_;\n\n helper.deleteBuffer(this.indices_);\n }\n\n super.disposeInternal();\n\n delete this.indices_;\n delete this.tileTextureCache_;\n delete this.frameState_;\n }\n}\n\nexport default WebGLTileLayerRenderer;\n","/**\n * Operators and utilities used for style expressions\n * @module ol/style/expressions\n */\n\nimport PaletteTexture from '../webgl/PaletteTexture.js';\nimport {Uniforms} from '../renderer/webgl/TileLayer.js';\nimport {asArray, fromString, isStringColor} from '../color.js';\n\n/**\n * Base type used for literal style parameters; can be a number literal or the output of an operator,\n * which in turns takes {@link import(\"./expressions.js\").ExpressionValue} arguments.\n *\n * The following operators can be used:\n *\n * * Reading operators:\n * * `['band', bandIndex, xOffset, yOffset]` For tile layers only. Fetches pixel values from band\n * `bandIndex` of the source's data. The first `bandIndex` of the source data is `1`. Fetched values\n * are in the 0..1 range. {@link import(\"../source/TileImage.js\").default} sources have 4 bands: red,\n * green, blue and alpha. {@link import(\"../source/DataTile.js\").default} sources can have any number\n * of bands, depending on the underlying data source and\n * {@link import(\"../source/GeoTIFF.js\").Options configuration}. `xOffset` and `yOffset` are optional\n * and allow specifying pixel offsets for x and y. This is used for sampling data from neighboring pixels.\n * * `['get', 'attributeName']` fetches a feature attribute (it will be prefixed by `a_` in the shader)\n * Note: those will be taken from the attributes provided to the renderer\n * * `['resolution']` returns the current resolution\n * * `['time']` returns the time in seconds since the creation of the layer\n * * `['var', 'varName']` fetches a value from the style variables, or 0 if undefined\n * * `['zoom']` returns the current zoom level\n *\n * * Math operators:\n * * `['*', value1, value2]` multiplies `value1` by `value2`\n * * `['/', value1, value2]` divides `value1` by `value2`\n * * `['+', value1, value2]` adds `value1` and `value2`\n * * `['-', value1, value2]` subtracts `value2` from `value1`\n * * `['clamp', value, low, high]` clamps `value` between `low` and `high`\n * * `['%', value1, value2]` returns the result of `value1 % value2` (modulo)\n * * `['^', value1, value2]` returns the value of `value1` raised to the `value2` power\n * * `['abs', value1]` returns the absolute value of `value1`\n * * `['floor', value1]` returns the nearest integer less than or equal to `value1`\n * * `['round', value1]` returns the nearest integer to `value1`\n * * `['ceil', value1]` returns the nearest integer greater than or equal to `value1`\n * * `['sin', value1]` returns the sine of `value1`\n * * `['cos', value1]` returns the cosine of `value1`\n * * `['atan', value1, value2]` returns `atan2(value1, value2)`. If `value2` is not provided, returns `atan(value1)`\n *\n * * Transform operators:\n * * `['case', condition1, output1, ...conditionN, outputN, fallback]` selects the first output whose corresponding\n * condition evaluates to `true`. If no match is found, returns the `fallback` value.\n * All conditions should be `boolean`, output and fallback can be any kind.\n * * `['match', input, match1, output1, ...matchN, outputN, fallback]` compares the `input` value against all\n * provided `matchX` values, returning the output associated with the first valid match. If no match is found,\n * returns the `fallback` value.\n * `input` and `matchX` values must all be of the same type, and can be `number` or `string`. `outputX` and\n * `fallback` values must be of the same type, and can be of any kind.\n * * `['interpolate', interpolation, input, stop1, output1, ...stopN, outputN]` returns a value by interpolating between\n * pairs of inputs and outputs; `interpolation` can either be `['linear']` or `['exponential', base]` where `base` is\n * the rate of increase from stop A to stop B (i.e. power to which the interpolation ratio is raised); a value\n * of 1 is equivalent to `['linear']`.\n * `input` and `stopX` values must all be of type `number`. `outputX` values can be `number` or `color` values.\n * Note: `input` will be clamped between `stop1` and `stopN`, meaning that all output values will be comprised\n * between `output1` and `outputN`.\n *\n * * Logical operators:\n * * `['<', value1, value2]` returns `true` if `value1` is strictly lower than `value2`, or `false` otherwise.\n * * `['<=', value1, value2]` returns `true` if `value1` is lower than or equals `value2`, or `false` otherwise.\n * * `['>', value1, value2]` returns `true` if `value1` is strictly greater than `value2`, or `false` otherwise.\n * * `['>=', value1, value2]` returns `true` if `value1` is greater than or equals `value2`, or `false` otherwise.\n * * `['==', value1, value2]` returns `true` if `value1` equals `value2`, or `false` otherwise.\n * * `['!=', value1, value2]` returns `true` if `value1` does not equal `value2`, or `false` otherwise.\n * * `['!', value1]` returns `false` if `value1` is `true` or greater than `0`, or `true` otherwise.\n * * `['all', value1, value2, ...]` returns `true` if all the inputs are `true`, `false` otherwise.\n * * `['any', value1, value2, ...]` returns `true` if any of the inputs are `true`, `false` otherwise.\n * * `['between', value1, value2, value3]` returns `true` if `value1` is contained between `value2` and `value3`\n * (inclusively), or `false` otherwise.\n *\n * * Conversion operators:\n * * `['array', value1, ...valueN]` creates a numerical array from `number` values; please note that the amount of\n * values can currently only be 2, 3 or 4.\n * * `['color', red, green, blue, alpha]` creates a `color` value from `number` values; the `alpha` parameter is\n * optional; if not specified, it will be set to 1.\n * Note: `red`, `green` and `blue` components must be values between 0 and 255; `alpha` between 0 and 1.\n * * `['palette', index, colors]` picks a `color` value from an array of colors using the given index; the `index`\n * expression must evaluate to a number; the items in the `colors` array must be strings with hex colors\n * (e.g. `'#86A136'`), colors using the rgba[a] functional notation (e.g. `'rgb(134, 161, 54)'` or `'rgba(134, 161, 54, 1)'`),\n * named colors (e.g. `'red'`), or array literals with 3 ([r, g, b]) or 4 ([r, g, b, a]) values (with r, g, and b\n * in the 0-255 range and a in the 0-1 range).\n *\n * Values can either be literals or another operator, as they will be evaluated recursively.\n * Literal values can be of the following types:\n * * `boolean`\n * * `number`\n * * `string`\n * * {@link module:ol/color~Color}\n *\n * @typedef {Array<*>|import(\"../color.js\").Color|string|number|boolean} ExpressionValue\n * @api\n */\n\n/**\n * Possible inferred types from a given value or expression.\n * Note: these are binary flags.\n * @enum {number}\n */\nexport const ValueTypes = {\n NUMBER: 0b00001,\n STRING: 0b00010,\n COLOR: 0b00100,\n BOOLEAN: 0b01000,\n NUMBER_ARRAY: 0b10000,\n ANY: 0b11111,\n NONE: 0,\n};\n\n/**\n * An operator declaration must contain two methods: `getReturnType` which returns a type based on\n * the operator arguments, and `toGlsl` which returns a GLSL-compatible string.\n * Note: both methods can process arguments recursively.\n * @typedef {Object} Operator\n * @property {function(Array): ValueTypes|number} getReturnType Returns one or several types\n * @property {function(ParsingContext, Array, ValueTypes=): string} toGlsl Returns a GLSL-compatible string\n * Note: takes in an optional type hint as 3rd parameter\n */\n\n/**\n * Operator declarations\n * @type {Object}\n */\nexport const Operators = {};\n\n/**\n * Returns the possible types for a given value (each type being a binary flag)\n * To test a value use e.g. `getValueType(v) & ValueTypes.BOOLEAN`\n * @param {ExpressionValue} value Value\n * @return {ValueTypes|number} Type or types inferred from the value\n */\nexport function getValueType(value) {\n if (typeof value === 'number') {\n return ValueTypes.NUMBER;\n }\n if (typeof value === 'boolean') {\n return ValueTypes.BOOLEAN;\n }\n if (typeof value === 'string') {\n if (isStringColor(value)) {\n return ValueTypes.COLOR | ValueTypes.STRING;\n }\n return ValueTypes.STRING;\n }\n if (!Array.isArray(value)) {\n throw new Error(`Unhandled value type: ${JSON.stringify(value)}`);\n }\n const valueArr = /** @type {Array<*>} */ (value);\n const onlyNumbers = valueArr.every(function (v) {\n return typeof v === 'number';\n });\n if (onlyNumbers) {\n if (valueArr.length === 3 || valueArr.length === 4) {\n return ValueTypes.COLOR | ValueTypes.NUMBER_ARRAY;\n }\n return ValueTypes.NUMBER_ARRAY;\n }\n if (typeof valueArr[0] !== 'string') {\n throw new Error(\n `Expected an expression operator but received: ${JSON.stringify(\n valueArr\n )}`\n );\n }\n const operator = Operators[valueArr[0]];\n if (operator === undefined) {\n throw new Error(\n `Unrecognized expression operator: ${JSON.stringify(valueArr)}`\n );\n }\n return operator.getReturnType(valueArr.slice(1));\n}\n\n/**\n * Checks if only one value type is enabled in the input number.\n * @param {ValueTypes|number} valueType Number containing value type binary flags\n * @return {boolean} True if only one type flag is enabled, false if zero or multiple\n */\nexport function isTypeUnique(valueType) {\n return Math.log2(valueType) % 1 === 0;\n}\n\n/**\n * Context available during the parsing of an expression.\n * @typedef {Object} ParsingContext\n * @property {boolean} [inFragmentShader] If false, means the expression output should be made for a vertex shader\n * @property {Array} variables List of variables used in the expression; contains **unprefixed names**\n * @property {Array} attributes List of attributes used in the expression; contains **unprefixed names**\n * @property {Object} stringLiteralsMap This object maps all encountered string values to a number\n * @property {Object} functions Lookup of functions used by the style.\n * @property {number} [bandCount] Number of bands per pixel.\n * @property {Array} [paletteTextures] List of palettes used by the style.\n */\n\n/**\n * Will return the number as a float with a dot separator, which is required by GLSL.\n * @param {number} v Numerical value.\n * @return {string} The value as string.\n */\nexport function numberToGlsl(v) {\n const s = v.toString();\n return s.includes('.') ? s : s + '.0';\n}\n\n/**\n * Will return the number array as a float with a dot separator, concatenated with ', '.\n * @param {Array} array Numerical values array.\n * @return {string} The array as a vector, e. g.: `vec3(1.0, 2.0, 3.0)`.\n */\nexport function arrayToGlsl(array) {\n if (array.length < 2 || array.length > 4) {\n throw new Error(\n '`formatArray` can only output `vec2`, `vec3` or `vec4` arrays.'\n );\n }\n return `vec${array.length}(${array.map(numberToGlsl).join(', ')})`;\n}\n\n/**\n * Will normalize and converts to string a `vec4` color array compatible with GLSL.\n * @param {string|import(\"../color.js\").Color} color Color either in string format or [r, g, b, a] array format,\n * with RGB components in the 0..255 range and the alpha component in the 0..1 range.\n * Note that the final array will always have 4 components.\n * @return {string} The color expressed in the `vec4(1.0, 1.0, 1.0, 1.0)` form.\n */\nexport function colorToGlsl(color) {\n const array = asArray(color).slice();\n if (array.length < 4) {\n array.push(1);\n }\n return arrayToGlsl(\n array.map(function (c, i) {\n return i < 3 ? c / 255 : c;\n })\n );\n}\n\n/**\n * Returns a stable equivalent number for the string literal.\n * @param {ParsingContext} context Parsing context\n * @param {string} string String literal value\n * @return {number} Number equivalent\n */\nexport function getStringNumberEquivalent(context, string) {\n if (context.stringLiteralsMap[string] === undefined) {\n context.stringLiteralsMap[string] = Object.keys(\n context.stringLiteralsMap\n ).length;\n }\n return context.stringLiteralsMap[string];\n}\n\n/**\n * Returns a stable equivalent number for the string literal, for use in shaders. This number is then\n * converted to be a GLSL-compatible string.\n * @param {ParsingContext} context Parsing context\n * @param {string} string String literal value\n * @return {string} GLSL-compatible string containing a number\n */\nexport function stringToGlsl(context, string) {\n return numberToGlsl(getStringNumberEquivalent(context, string));\n}\n\n/**\n * Recursively parses a style expression and outputs a GLSL-compatible string. Takes in a parsing context that\n * will be read and modified during the parsing operation.\n * @param {ParsingContext} context Parsing context\n * @param {ExpressionValue} value Value\n * @param {ValueTypes|number} [typeHint] Hint for the expected final type (can be several types combined)\n * @return {string} GLSL-compatible output\n */\nexport function expressionToGlsl(context, value, typeHint) {\n // operator\n if (Array.isArray(value) && typeof value[0] === 'string') {\n const operator = Operators[value[0]];\n if (operator === undefined) {\n throw new Error(\n `Unrecognized expression operator: ${JSON.stringify(value)}`\n );\n }\n return operator.toGlsl(context, value.slice(1), typeHint);\n }\n\n const valueType = getValueType(value);\n if ((valueType & ValueTypes.NUMBER) > 0) {\n return numberToGlsl(/** @type {number} */ (value));\n }\n\n if ((valueType & ValueTypes.BOOLEAN) > 0) {\n return value.toString();\n }\n\n if (\n (valueType & ValueTypes.STRING) > 0 &&\n (typeHint === undefined || typeHint == ValueTypes.STRING)\n ) {\n return stringToGlsl(context, value.toString());\n }\n\n if (\n (valueType & ValueTypes.COLOR) > 0 &&\n (typeHint === undefined || typeHint == ValueTypes.COLOR)\n ) {\n return colorToGlsl(/** @type {Array | string} */ (value));\n }\n\n if ((valueType & ValueTypes.NUMBER_ARRAY) > 0) {\n return arrayToGlsl(/** @type {Array} */ (value));\n }\n\n throw new Error(`Unexpected expression ${value} (expected type ${typeHint})`);\n}\n\nfunction assertNumber(value) {\n if (!(getValueType(value) & ValueTypes.NUMBER)) {\n throw new Error(\n `A numeric value was expected, got ${JSON.stringify(value)} instead`\n );\n }\n}\nfunction assertNumbers(values) {\n for (let i = 0; i < values.length; i++) {\n assertNumber(values[i]);\n }\n}\nfunction assertString(value) {\n if (!(getValueType(value) & ValueTypes.STRING)) {\n throw new Error(\n `A string value was expected, got ${JSON.stringify(value)} instead`\n );\n }\n}\nfunction assertBoolean(value) {\n if (!(getValueType(value) & ValueTypes.BOOLEAN)) {\n throw new Error(\n `A boolean value was expected, got ${JSON.stringify(value)} instead`\n );\n }\n}\nfunction assertArgsCount(args, count) {\n if (args.length !== count) {\n throw new Error(\n `Exactly ${count} arguments were expected, got ${args.length} instead`\n );\n }\n}\nfunction assertArgsMinCount(args, count) {\n if (args.length < count) {\n throw new Error(\n `At least ${count} arguments were expected, got ${args.length} instead`\n );\n }\n}\nfunction assertArgsMaxCount(args, count) {\n if (args.length > count) {\n throw new Error(\n `At most ${count} arguments were expected, got ${args.length} instead`\n );\n }\n}\nfunction assertArgsEven(args) {\n if (args.length % 2 !== 0) {\n throw new Error(\n `An even amount of arguments was expected, got ${args} instead`\n );\n }\n}\nfunction assertArgsOdd(args) {\n if (args.length % 2 === 0) {\n throw new Error(\n `An odd amount of arguments was expected, got ${args} instead`\n );\n }\n}\nfunction assertUniqueInferredType(args, types) {\n if (!isTypeUnique(types)) {\n throw new Error(\n `Could not infer only one type from the following expression: ${JSON.stringify(\n args\n )}`\n );\n }\n}\n\nOperators['get'] = {\n getReturnType: function (args) {\n return ValueTypes.ANY;\n },\n toGlsl: function (context, args) {\n assertArgsCount(args, 1);\n assertString(args[0]);\n const value = args[0].toString();\n if (!context.attributes.includes(value)) {\n context.attributes.push(value);\n }\n const prefix = context.inFragmentShader ? 'v_' : 'a_';\n return prefix + value;\n },\n};\n\n/**\n * Get the uniform name given a variable name.\n * @param {string} variableName The variable name.\n * @return {string} The uniform name.\n */\nexport function uniformNameForVariable(variableName) {\n return 'u_var_' + variableName;\n}\n\nOperators['var'] = {\n getReturnType: function (args) {\n return ValueTypes.ANY;\n },\n toGlsl: function (context, args) {\n assertArgsCount(args, 1);\n assertString(args[0]);\n const value = args[0].toString();\n if (!context.variables.includes(value)) {\n context.variables.push(value);\n }\n return uniformNameForVariable(value);\n },\n};\n\nexport const PALETTE_TEXTURE_ARRAY = 'u_paletteTextures';\n\n// ['palette', index, colors]\nOperators['palette'] = {\n getReturnType: function (args) {\n return ValueTypes.COLOR;\n },\n toGlsl: function (context, args) {\n assertArgsCount(args, 2);\n assertNumber(args[0]);\n const index = expressionToGlsl(context, args[0]);\n const colors = args[1];\n if (!Array.isArray(colors)) {\n throw new Error('The second argument of palette must be an array');\n }\n const numColors = colors.length;\n const palette = new Uint8Array(numColors * 4);\n for (let i = 0; i < numColors; i++) {\n const candidate = colors[i];\n /**\n * @type {import('../color.js').Color}\n */\n let color;\n if (typeof candidate === 'string') {\n color = fromString(candidate);\n } else {\n if (!Array.isArray(candidate)) {\n throw new Error(\n 'The second argument of palette must be an array of strings or colors'\n );\n }\n const length = candidate.length;\n if (length === 4) {\n color = candidate;\n } else {\n if (length !== 3) {\n throw new Error(\n `Expected palette color to have 3 or 4 values, got ${length}`\n );\n }\n color = [candidate[0], candidate[1], candidate[2], 1];\n }\n }\n const offset = i * 4;\n palette[offset] = color[0];\n palette[offset + 1] = color[1];\n palette[offset + 2] = color[2];\n palette[offset + 3] = color[3] * 255;\n }\n if (!context.paletteTextures) {\n context.paletteTextures = [];\n }\n const paletteName = `${PALETTE_TEXTURE_ARRAY}[${context.paletteTextures.length}]`;\n const paletteTexture = new PaletteTexture(paletteName, palette);\n context.paletteTextures.push(paletteTexture);\n return `texture2D(${paletteName}, vec2((${index} + 0.5) / ${numColors}.0, 0.5))`;\n },\n};\n\nconst GET_BAND_VALUE_FUNC = 'getBandValue';\n\nOperators['band'] = {\n getReturnType: function (args) {\n return ValueTypes.NUMBER;\n },\n toGlsl: function (context, args) {\n assertArgsMinCount(args, 1);\n assertArgsMaxCount(args, 3);\n const band = args[0];\n\n if (!(GET_BAND_VALUE_FUNC in context.functions)) {\n let ifBlocks = '';\n const bandCount = context.bandCount || 1;\n for (let i = 0; i < bandCount; i++) {\n const colorIndex = Math.floor(i / 4);\n let bandIndex = i % 4;\n if (i === bandCount - 1 && bandIndex === 1) {\n // LUMINANCE_ALPHA - band 1 assigned to rgb and band 2 assigned to alpha\n bandIndex = 3;\n }\n const textureName = `${Uniforms.TILE_TEXTURE_ARRAY}[${colorIndex}]`;\n ifBlocks += `\n if (band == ${i + 1}.0) {\n return texture2D(${textureName}, v_textureCoord + vec2(dx, dy))[${bandIndex}];\n }\n `;\n }\n\n context.functions[GET_BAND_VALUE_FUNC] = `\n float getBandValue(float band, float xOffset, float yOffset) {\n float dx = xOffset / ${Uniforms.TEXTURE_PIXEL_WIDTH};\n float dy = yOffset / ${Uniforms.TEXTURE_PIXEL_HEIGHT};\n ${ifBlocks}\n }\n `;\n }\n\n const bandExpression = expressionToGlsl(context, band);\n const xOffsetExpression = expressionToGlsl(context, args[1] || 0);\n const yOffsetExpression = expressionToGlsl(context, args[2] || 0);\n return `${GET_BAND_VALUE_FUNC}(${bandExpression}, ${xOffsetExpression}, ${yOffsetExpression})`;\n },\n};\n\nOperators['time'] = {\n getReturnType: function (args) {\n return ValueTypes.NUMBER;\n },\n toGlsl: function (context, args) {\n assertArgsCount(args, 0);\n return 'u_time';\n },\n};\n\nOperators['zoom'] = {\n getReturnType: function (args) {\n return ValueTypes.NUMBER;\n },\n toGlsl: function (context, args) {\n assertArgsCount(args, 0);\n return 'u_zoom';\n },\n};\n\nOperators['resolution'] = {\n getReturnType: function (args) {\n return ValueTypes.NUMBER;\n },\n toGlsl: function (context, args) {\n assertArgsCount(args, 0);\n return 'u_resolution';\n },\n};\n\nOperators['*'] = {\n getReturnType: function (args) {\n return ValueTypes.NUMBER;\n },\n toGlsl: function (context, args) {\n assertArgsMinCount(args, 2);\n assertNumbers(args);\n return `(${args.map((arg) => expressionToGlsl(context, arg)).join(' * ')})`;\n },\n};\n\nOperators['/'] = {\n getReturnType: function (args) {\n return ValueTypes.NUMBER;\n },\n toGlsl: function (context, args) {\n assertArgsCount(args, 2);\n assertNumbers(args);\n return `(${expressionToGlsl(context, args[0])} / ${expressionToGlsl(\n context,\n args[1]\n )})`;\n },\n};\n\nOperators['+'] = {\n getReturnType: function (args) {\n return ValueTypes.NUMBER;\n },\n toGlsl: function (context, args) {\n assertArgsMinCount(args, 2);\n assertNumbers(args);\n\n return `(${args.map((arg) => expressionToGlsl(context, arg)).join(' + ')})`;\n },\n};\n\nOperators['-'] = {\n getReturnType: function (args) {\n return ValueTypes.NUMBER;\n },\n toGlsl: function (context, args) {\n assertArgsCount(args, 2);\n assertNumbers(args);\n return `(${expressionToGlsl(context, args[0])} - ${expressionToGlsl(\n context,\n args[1]\n )})`;\n },\n};\n\nOperators['clamp'] = {\n getReturnType: function (args) {\n return ValueTypes.NUMBER;\n },\n toGlsl: function (context, args) {\n assertArgsCount(args, 3);\n assertNumbers(args);\n const min = expressionToGlsl(context, args[1]);\n const max = expressionToGlsl(context, args[2]);\n return `clamp(${expressionToGlsl(context, args[0])}, ${min}, ${max})`;\n },\n};\n\nOperators['%'] = {\n getReturnType: function (args) {\n return ValueTypes.NUMBER;\n },\n toGlsl: function (context, args) {\n assertArgsCount(args, 2);\n assertNumbers(args);\n return `mod(${expressionToGlsl(context, args[0])}, ${expressionToGlsl(\n context,\n args[1]\n )})`;\n },\n};\n\nOperators['^'] = {\n getReturnType: function (args) {\n return ValueTypes.NUMBER;\n },\n toGlsl: function (context, args) {\n assertArgsCount(args, 2);\n assertNumbers(args);\n return `pow(${expressionToGlsl(context, args[0])}, ${expressionToGlsl(\n context,\n args[1]\n )})`;\n },\n};\n\nOperators['abs'] = {\n getReturnType: function (args) {\n return ValueTypes.NUMBER;\n },\n toGlsl: function (context, args) {\n assertArgsCount(args, 1);\n assertNumbers(args);\n return `abs(${expressionToGlsl(context, args[0])})`;\n },\n};\n\nOperators['floor'] = {\n getReturnType: function (args) {\n return ValueTypes.NUMBER;\n },\n toGlsl: function (context, args) {\n assertArgsCount(args, 1);\n assertNumbers(args);\n return `floor(${expressionToGlsl(context, args[0])})`;\n },\n};\n\nOperators['round'] = {\n getReturnType: function (args) {\n return ValueTypes.NUMBER;\n },\n toGlsl: function (context, args) {\n assertArgsCount(args, 1);\n assertNumbers(args);\n return `floor(${expressionToGlsl(context, args[0])} + 0.5)`;\n },\n};\n\nOperators['ceil'] = {\n getReturnType: function (args) {\n return ValueTypes.NUMBER;\n },\n toGlsl: function (context, args) {\n assertArgsCount(args, 1);\n assertNumbers(args);\n return `ceil(${expressionToGlsl(context, args[0])})`;\n },\n};\n\nOperators['sin'] = {\n getReturnType: function (args) {\n return ValueTypes.NUMBER;\n },\n toGlsl: function (context, args) {\n assertArgsCount(args, 1);\n assertNumbers(args);\n return `sin(${expressionToGlsl(context, args[0])})`;\n },\n};\n\nOperators['cos'] = {\n getReturnType: function (args) {\n return ValueTypes.NUMBER;\n },\n toGlsl: function (context, args) {\n assertArgsCount(args, 1);\n assertNumbers(args);\n return `cos(${expressionToGlsl(context, args[0])})`;\n },\n};\n\nOperators['atan'] = {\n getReturnType: function (args) {\n return ValueTypes.NUMBER;\n },\n toGlsl: function (context, args) {\n assertArgsMinCount(args, 1);\n assertArgsMaxCount(args, 2);\n assertNumbers(args);\n return args.length === 2\n ? `atan(${expressionToGlsl(context, args[0])}, ${expressionToGlsl(\n context,\n args[1]\n )})`\n : `atan(${expressionToGlsl(context, args[0])})`;\n },\n};\n\nOperators['>'] = {\n getReturnType: function (args) {\n return ValueTypes.BOOLEAN;\n },\n toGlsl: function (context, args) {\n assertArgsCount(args, 2);\n assertNumbers(args);\n return `(${expressionToGlsl(context, args[0])} > ${expressionToGlsl(\n context,\n args[1]\n )})`;\n },\n};\n\nOperators['>='] = {\n getReturnType: function (args) {\n return ValueTypes.BOOLEAN;\n },\n toGlsl: function (context, args) {\n assertArgsCount(args, 2);\n assertNumbers(args);\n return `(${expressionToGlsl(context, args[0])} >= ${expressionToGlsl(\n context,\n args[1]\n )})`;\n },\n};\n\nOperators['<'] = {\n getReturnType: function (args) {\n return ValueTypes.BOOLEAN;\n },\n toGlsl: function (context, args) {\n assertArgsCount(args, 2);\n assertNumbers(args);\n return `(${expressionToGlsl(context, args[0])} < ${expressionToGlsl(\n context,\n args[1]\n )})`;\n },\n};\n\nOperators['<='] = {\n getReturnType: function (args) {\n return ValueTypes.BOOLEAN;\n },\n toGlsl: function (context, args) {\n assertArgsCount(args, 2);\n assertNumbers(args);\n return `(${expressionToGlsl(context, args[0])} <= ${expressionToGlsl(\n context,\n args[1]\n )})`;\n },\n};\n\nfunction getEqualOperator(operator) {\n return {\n getReturnType: function (args) {\n return ValueTypes.BOOLEAN;\n },\n toGlsl: function (context, args) {\n assertArgsCount(args, 2);\n\n // find common type\n let type = ValueTypes.ANY;\n for (let i = 0; i < args.length; i++) {\n type &= getValueType(args[i]);\n }\n if (type === ValueTypes.NONE) {\n throw new Error(\n `All arguments should be of compatible type, got ${JSON.stringify(\n args\n )} instead`\n );\n }\n\n // Since it's not possible to have color types here, we can leave it out\n // This fixes issues in case the value type is ambiguously detected as a color (e.g. the string 'red')\n type &= ~ValueTypes.COLOR;\n\n return `(${expressionToGlsl(\n context,\n args[0],\n type\n )} ${operator} ${expressionToGlsl(context, args[1], type)})`;\n },\n };\n}\n\nOperators['=='] = getEqualOperator('==');\n\nOperators['!='] = getEqualOperator('!=');\n\nOperators['!'] = {\n getReturnType: function (args) {\n return ValueTypes.BOOLEAN;\n },\n toGlsl: function (context, args) {\n assertArgsCount(args, 1);\n assertBoolean(args[0]);\n return `(!${expressionToGlsl(context, args[0])})`;\n },\n};\n\nfunction getDecisionOperator(operator) {\n return {\n getReturnType: function (args) {\n return ValueTypes.BOOLEAN;\n },\n toGlsl: function (context, args) {\n assertArgsMinCount(args, 2);\n for (let i = 0; i < args.length; i++) {\n assertBoolean(args[i]);\n }\n let result = '';\n result = args\n .map((arg) => expressionToGlsl(context, arg))\n .join(` ${operator} `);\n result = `(${result})`;\n return result;\n },\n };\n}\n\nOperators['all'] = getDecisionOperator('&&');\n\nOperators['any'] = getDecisionOperator('||');\n\nOperators['between'] = {\n getReturnType: function (args) {\n return ValueTypes.BOOLEAN;\n },\n toGlsl: function (context, args) {\n assertArgsCount(args, 3);\n assertNumbers(args);\n const min = expressionToGlsl(context, args[1]);\n const max = expressionToGlsl(context, args[2]);\n const value = expressionToGlsl(context, args[0]);\n return `(${value} >= ${min} && ${value} <= ${max})`;\n },\n};\n\nOperators['array'] = {\n getReturnType: function (args) {\n return ValueTypes.NUMBER_ARRAY;\n },\n toGlsl: function (context, args) {\n assertArgsMinCount(args, 2);\n assertArgsMaxCount(args, 4);\n assertNumbers(args);\n const parsedArgs = args.map(function (val) {\n return expressionToGlsl(context, val, ValueTypes.NUMBER);\n });\n return `vec${args.length}(${parsedArgs.join(', ')})`;\n },\n};\n\nOperators['color'] = {\n getReturnType: function (args) {\n return ValueTypes.COLOR;\n },\n toGlsl: function (context, args) {\n assertArgsMinCount(args, 3);\n assertArgsMaxCount(args, 4);\n assertNumbers(args);\n const array = /** @type {Array} */ (args);\n if (args.length === 3) {\n array.push(1);\n }\n const parsedArgs = args.map(function (val, i) {\n return (\n expressionToGlsl(context, val, ValueTypes.NUMBER) +\n (i < 3 ? ' / 255.0' : '')\n );\n });\n return `vec${args.length}(${parsedArgs.join(', ')})`;\n },\n};\n\nOperators['interpolate'] = {\n getReturnType: function (args) {\n let type = ValueTypes.COLOR | ValueTypes.NUMBER;\n for (let i = 3; i < args.length; i += 2) {\n type = type & getValueType(args[i]);\n }\n return type;\n },\n toGlsl: function (context, args, typeHint) {\n assertArgsEven(args);\n assertArgsMinCount(args, 6);\n\n // validate interpolation type\n const type = args[0];\n let interpolation;\n switch (type[0]) {\n case 'linear':\n interpolation = 1;\n break;\n case 'exponential':\n interpolation = type[1];\n break;\n default:\n interpolation = null;\n }\n if (!interpolation) {\n throw new Error(\n `Invalid interpolation type for \"interpolate\" operator, received: ${JSON.stringify(\n type\n )}`\n );\n }\n\n // compute input/output types\n typeHint = typeHint !== undefined ? typeHint : ValueTypes.ANY;\n const outputType = Operators['interpolate'].getReturnType(args) & typeHint;\n assertUniqueInferredType(args, outputType);\n\n const input = expressionToGlsl(context, args[1]);\n const exponent = numberToGlsl(interpolation);\n\n let result = '';\n for (let i = 2; i < args.length - 2; i += 2) {\n const stop1 = expressionToGlsl(context, args[i]);\n const output1 =\n result || expressionToGlsl(context, args[i + 1], outputType);\n const stop2 = expressionToGlsl(context, args[i + 2]);\n const output2 = expressionToGlsl(context, args[i + 3], outputType);\n result = `mix(${output1}, ${output2}, pow(clamp((${input} - ${stop1}) / (${stop2} - ${stop1}), 0.0, 1.0), ${exponent}))`;\n }\n return result;\n },\n};\n\nOperators['match'] = {\n getReturnType: function (args) {\n let type = ValueTypes.ANY;\n for (let i = 2; i < args.length; i += 2) {\n type = type & getValueType(args[i]);\n }\n type = type & getValueType(args[args.length - 1]);\n return type;\n },\n toGlsl: function (context, args, typeHint) {\n assertArgsEven(args);\n assertArgsMinCount(args, 4);\n\n typeHint = typeHint !== undefined ? typeHint : ValueTypes.ANY;\n const outputType = Operators['match'].getReturnType(args) & typeHint;\n assertUniqueInferredType(args, outputType);\n\n const input = expressionToGlsl(context, args[0]);\n const fallback = expressionToGlsl(\n context,\n args[args.length - 1],\n outputType\n );\n let result = null;\n for (let i = args.length - 3; i >= 1; i -= 2) {\n const match = expressionToGlsl(context, args[i]);\n const output = expressionToGlsl(context, args[i + 1], outputType);\n result = `(${input} == ${match} ? ${output} : ${result || fallback})`;\n }\n return result;\n },\n};\n\nOperators['case'] = {\n getReturnType: function (args) {\n let type = ValueTypes.ANY;\n for (let i = 1; i < args.length; i += 2) {\n type = type & getValueType(args[i]);\n }\n type = type & getValueType(args[args.length - 1]);\n return type;\n },\n toGlsl: function (context, args, typeHint) {\n assertArgsOdd(args);\n assertArgsMinCount(args, 3);\n\n typeHint = typeHint !== undefined ? typeHint : ValueTypes.ANY;\n const outputType = Operators['case'].getReturnType(args) & typeHint;\n assertUniqueInferredType(args, outputType);\n for (let i = 0; i < args.length - 1; i += 2) {\n assertBoolean(args[i]);\n }\n\n const fallback = expressionToGlsl(\n context,\n args[args.length - 1],\n outputType\n );\n let result = null;\n for (let i = args.length - 3; i >= 0; i -= 2) {\n const condition = expressionToGlsl(context, args[i]);\n const output = expressionToGlsl(context, args[i + 1], outputType);\n result = `(${condition} ? ${output} : ${result || fallback})`;\n }\n return result;\n },\n};\n","/**\n * Classes and utilities for generating shaders from literal style objects\n * @module ol/webgl/ShaderBuilder\n */\n\nimport {\n ValueTypes,\n expressionToGlsl,\n getStringNumberEquivalent,\n uniformNameForVariable,\n} from '../style/expressions.js';\n\n/**\n * @typedef {Object} VaryingDescription\n * @property {string} name Varying name, as will be declared in the header.\n * @property {string} type Varying type, either `float`, `vec2`, `vec4`...\n * @property {string} expression Expression which will be assigned to the varying in the vertex shader, and\n * passed on to the fragment shader.\n */\n\n/**\n * @classdesc\n * This class implements a classic builder pattern for generating many different types of shaders.\n * Methods can be chained, e. g.:\n *\n * ```js\n * const shader = new ShaderBuilder()\n * .addVarying('v_width', 'float', 'a_width')\n * .addUniform('u_time')\n * .setColorExpression('...')\n * .setSizeExpression('...')\n * .outputSymbolFragmentShader();\n * ```\n */\nexport class ShaderBuilder {\n constructor() {\n /**\n * Uniforms; these will be declared in the header (should include the type).\n * @type {Array}\n * @private\n */\n this.uniforms = [];\n\n /**\n * Attributes; these will be declared in the header (should include the type).\n * @type {Array}\n * @private\n */\n this.attributes = [];\n\n /**\n * Varyings with a name, a type and an expression.\n * @type {Array}\n * @private\n */\n this.varyings = [];\n\n /**\n * @type {string}\n * @private\n */\n this.sizeExpression = 'vec2(1.0)';\n\n /**\n * @type {string}\n * @private\n */\n this.rotationExpression = '0.0';\n\n /**\n * @type {string}\n * @private\n */\n this.offsetExpression = 'vec2(0.0)';\n\n /**\n * @type {string}\n * @private\n */\n this.colorExpression = 'vec4(1.0)';\n\n /**\n * @type {string}\n * @private\n */\n this.texCoordExpression = 'vec4(0.0, 0.0, 1.0, 1.0)';\n\n /**\n * @type {string}\n * @private\n */\n this.discardExpression = 'false';\n\n /**\n * @type {boolean}\n * @private\n */\n this.rotateWithView = false;\n }\n\n /**\n * Adds a uniform accessible in both fragment and vertex shaders.\n * The given name should include a type, such as `sampler2D u_texture`.\n * @param {string} name Uniform name\n * @return {ShaderBuilder} the builder object\n */\n addUniform(name) {\n this.uniforms.push(name);\n return this;\n }\n\n /**\n * Adds an attribute accessible in the vertex shader, read from the geometry buffer.\n * The given name should include a type, such as `vec2 a_position`.\n * @param {string} name Attribute name\n * @return {ShaderBuilder} the builder object\n */\n addAttribute(name) {\n this.attributes.push(name);\n return this;\n }\n\n /**\n * Adds a varying defined in the vertex shader and accessible from the fragment shader.\n * The type and expression of the varying have to be specified separately.\n * @param {string} name Varying name\n * @param {'float'|'vec2'|'vec3'|'vec4'} type Type\n * @param {string} expression Expression used to assign a value to the varying.\n * @return {ShaderBuilder} the builder object\n */\n addVarying(name, type, expression) {\n this.varyings.push({\n name: name,\n type: type,\n expression: expression,\n });\n return this;\n }\n\n /**\n * Sets an expression to compute the size of the shape.\n * This expression can use all the uniforms and attributes available\n * in the vertex shader, and should evaluate to a `vec2` value.\n * @param {string} expression Size expression\n * @return {ShaderBuilder} the builder object\n */\n setSizeExpression(expression) {\n this.sizeExpression = expression;\n return this;\n }\n\n /**\n * Sets an expression to compute the rotation of the shape.\n * This expression can use all the uniforms and attributes available\n * in the vertex shader, and should evaluate to a `float` value in radians.\n * @param {string} expression Size expression\n * @return {ShaderBuilder} the builder object\n */\n setRotationExpression(expression) {\n this.rotationExpression = expression;\n return this;\n }\n\n /**\n * Sets an expression to compute the offset of the symbol from the point center.\n * This expression can use all the uniforms and attributes available\n * in the vertex shader, and should evaluate to a `vec2` value.\n * Note: will only be used for point geometry shaders.\n * @param {string} expression Offset expression\n * @return {ShaderBuilder} the builder object\n */\n setSymbolOffsetExpression(expression) {\n this.offsetExpression = expression;\n return this;\n }\n\n /**\n * Sets an expression to compute the color of the shape.\n * This expression can use all the uniforms, varyings and attributes available\n * in the fragment shader, and should evaluate to a `vec4` value.\n * @param {string} expression Color expression\n * @return {ShaderBuilder} the builder object\n */\n setColorExpression(expression) {\n this.colorExpression = expression;\n return this;\n }\n\n /**\n * Sets an expression to compute the texture coordinates of the vertices.\n * This expression can use all the uniforms and attributes available\n * in the vertex shader, and should evaluate to a `vec4` value.\n * @param {string} expression Texture coordinate expression\n * @return {ShaderBuilder} the builder object\n */\n setTextureCoordinateExpression(expression) {\n this.texCoordExpression = expression;\n return this;\n }\n\n /**\n * Sets an expression to determine whether a fragment (pixel) should be discarded,\n * i.e. not drawn at all.\n * This expression can use all the uniforms, varyings and attributes available\n * in the fragment shader, and should evaluate to a `bool` value (it will be\n * used in an `if` statement)\n * @param {string} expression Fragment discard expression\n * @return {ShaderBuilder} the builder object\n */\n setFragmentDiscardExpression(expression) {\n this.discardExpression = expression;\n return this;\n }\n\n /**\n * Sets whether the symbols should rotate with the view or stay aligned with the map.\n * Note: will only be used for point geometry shaders.\n * @param {boolean} rotateWithView Rotate with view\n * @return {ShaderBuilder} the builder object\n */\n setSymbolRotateWithView(rotateWithView) {\n this.rotateWithView = rotateWithView;\n return this;\n }\n\n /**\n * @return {string} Previously set size expression\n */\n getSizeExpression() {\n return this.sizeExpression;\n }\n\n /**\n * @return {string} Previously set symbol offset expression\n */\n getOffsetExpression() {\n return this.offsetExpression;\n }\n\n /**\n * @return {string} Previously set color expression\n */\n getColorExpression() {\n return this.colorExpression;\n }\n\n /**\n * @return {string} Previously set texture coordinate expression\n */\n getTextureCoordinateExpression() {\n return this.texCoordExpression;\n }\n\n /**\n * @return {string} Previously set fragment discard expression\n */\n getFragmentDiscardExpression() {\n return this.discardExpression;\n }\n\n /**\n * Generates a symbol vertex shader from the builder parameters,\n * intended to be used on point geometries.\n *\n * Four uniforms are hardcoded in all shaders: `u_projectionMatrix`, `u_offsetScaleMatrix`,\n * `u_offsetRotateMatrix`, `u_time`.\n *\n * The following attributes are hardcoded and expected to be present in the vertex buffers:\n * `vec2 a_position`, `float a_index` (being the index of the vertex in the quad, 0 to 3).\n *\n * The following varyings are hardcoded and gives the coordinate of the pixel both in the quad and on the texture:\n * `vec2 v_quadCoord`, `vec2 v_texCoord`\n *\n * @param {boolean} [forHitDetection] If true, the shader will be modified to include hit detection variables\n * (namely, hit color with encoded feature id).\n * @return {string} The full shader as a string.\n */\n getSymbolVertexShader(forHitDetection) {\n const offsetMatrix = this.rotateWithView\n ? 'u_offsetScaleMatrix * u_offsetRotateMatrix'\n : 'u_offsetScaleMatrix';\n\n let attributes = this.attributes;\n let varyings = this.varyings;\n\n if (forHitDetection) {\n attributes = attributes.concat('vec4 a_hitColor');\n varyings = varyings.concat({\n name: 'v_hitColor',\n type: 'vec4',\n expression: 'a_hitColor',\n });\n }\n\n return `precision mediump float;\nuniform mat4 u_projectionMatrix;\nuniform mat4 u_offsetScaleMatrix;\nuniform mat4 u_offsetRotateMatrix;\nuniform float u_time;\nuniform float u_zoom;\nuniform float u_resolution;\n${this.uniforms\n .map(function (uniform) {\n return 'uniform ' + uniform + ';';\n })\n .join('\\n')}\nattribute vec2 a_position;\nattribute float a_index;\n${attributes\n .map(function (attribute) {\n return 'attribute ' + attribute + ';';\n })\n .join('\\n')}\nvarying vec2 v_texCoord;\nvarying vec2 v_quadCoord;\n${varyings\n .map(function (varying) {\n return 'varying ' + varying.type + ' ' + varying.name + ';';\n })\n .join('\\n')}\nvoid main(void) {\n mat4 offsetMatrix = ${offsetMatrix};\n vec2 halfSize = ${this.sizeExpression} * 0.5;\n vec2 offset = ${this.offsetExpression};\n float angle = ${this.rotationExpression};\n float offsetX;\n float offsetY;\n if (a_index == 0.0) {\n offsetX = (offset.x - halfSize.x) * cos(angle) + (offset.y - halfSize.y) * sin(angle);\n offsetY = (offset.y - halfSize.y) * cos(angle) - (offset.x - halfSize.x) * sin(angle);\n } else if (a_index == 1.0) {\n offsetX = (offset.x + halfSize.x) * cos(angle) + (offset.y - halfSize.y) * sin(angle);\n offsetY = (offset.y - halfSize.y) * cos(angle) - (offset.x + halfSize.x) * sin(angle);\n } else if (a_index == 2.0) {\n offsetX = (offset.x + halfSize.x) * cos(angle) + (offset.y + halfSize.y) * sin(angle);\n offsetY = (offset.y + halfSize.y) * cos(angle) - (offset.x + halfSize.x) * sin(angle);\n } else {\n offsetX = (offset.x - halfSize.x) * cos(angle) + (offset.y + halfSize.y) * sin(angle);\n offsetY = (offset.y + halfSize.y) * cos(angle) - (offset.x - halfSize.x) * sin(angle);\n }\n vec4 offsets = offsetMatrix * vec4(offsetX, offsetY, 0.0, 0.0);\n gl_Position = u_projectionMatrix * vec4(a_position, 0.0, 1.0) + offsets;\n vec4 texCoord = ${this.texCoordExpression};\n float u = a_index == 0.0 || a_index == 3.0 ? texCoord.s : texCoord.p;\n float v = a_index == 2.0 || a_index == 3.0 ? texCoord.t : texCoord.q;\n v_texCoord = vec2(u, v);\n u = a_index == 0.0 || a_index == 3.0 ? 0.0 : 1.0;\n v = a_index == 2.0 || a_index == 3.0 ? 0.0 : 1.0;\n v_quadCoord = vec2(u, v);\n${varyings\n .map(function (varying) {\n return ' ' + varying.name + ' = ' + varying.expression + ';';\n })\n .join('\\n')}\n}`;\n }\n\n /**\n * Generates a symbol fragment shader from the builder parameters,\n * intended to be used on point geometries.\n *\n * Expects the following varyings to be transmitted by the vertex shader:\n * `vec2 v_quadCoord`, `vec2 v_texCoord`\n *\n * @param {boolean} [forHitDetection] If true, the shader will be modified to include hit detection variables\n * (namely, hit color with encoded feature id).\n * @return {string} The full shader as a string.\n */\n getSymbolFragmentShader(forHitDetection) {\n const hitDetectionBypass = forHitDetection\n ? ' if (gl_FragColor.a < 0.1) { discard; } gl_FragColor = v_hitColor;'\n : '';\n\n let varyings = this.varyings;\n\n if (forHitDetection) {\n varyings = varyings.concat({\n name: 'v_hitColor',\n type: 'vec4',\n expression: 'a_hitColor',\n });\n }\n\n return `precision mediump float;\nuniform float u_time;\nuniform float u_zoom;\nuniform float u_resolution;\n${this.uniforms\n .map(function (uniform) {\n return 'uniform ' + uniform + ';';\n })\n .join('\\n')}\nvarying vec2 v_texCoord;\nvarying vec2 v_quadCoord;\n${varyings\n .map(function (varying) {\n return 'varying ' + varying.type + ' ' + varying.name + ';';\n })\n .join('\\n')}\nvoid main(void) {\n if (${this.discardExpression}) { discard; }\n gl_FragColor = ${this.colorExpression};\n gl_FragColor.rgb *= gl_FragColor.a;\n${hitDetectionBypass}\n}`;\n }\n}\n\n/**\n * @typedef {Object} StyleParseResult\n * @property {ShaderBuilder} builder Shader builder pre-configured according to a given style\n * @property {Object} uniforms Uniform definitions.\n * @property {Array} attributes Attribute descriptions.\n */\n\n/**\n * Parses a {@link import(\"../style/literal\").LiteralStyle} object and returns a {@link ShaderBuilder}\n * object that has been configured according to the given style, as well as `attributes` and `uniforms`\n * arrays to be fed to the `WebGLPointsRenderer` class.\n *\n * Also returns `uniforms` and `attributes` properties as expected by the\n * {@link module:ol/renderer/webgl/PointsLayer~WebGLPointsLayerRenderer}.\n *\n * @param {import(\"../style/literal\").LiteralStyle} style Literal style.\n * @return {StyleParseResult} Result containing shader params, attributes and uniforms.\n */\nexport function parseLiteralStyle(style) {\n const symbStyle = style.symbol;\n const size = symbStyle.size !== undefined ? symbStyle.size : 1;\n const color = symbStyle.color || 'white';\n const texCoord = symbStyle.textureCoord || [0, 0, 1, 1];\n const offset = symbStyle.offset || [0, 0];\n const opacity = symbStyle.opacity !== undefined ? symbStyle.opacity : 1;\n const rotation = symbStyle.rotation !== undefined ? symbStyle.rotation : 0;\n\n /**\n * @type {import(\"../style/expressions.js\").ParsingContext}\n */\n const vertContext = {\n inFragmentShader: false,\n variables: [],\n attributes: [],\n stringLiteralsMap: {},\n functions: {},\n };\n const parsedSize = expressionToGlsl(\n vertContext,\n size,\n ValueTypes.NUMBER_ARRAY | ValueTypes.NUMBER\n );\n const parsedOffset = expressionToGlsl(\n vertContext,\n offset,\n ValueTypes.NUMBER_ARRAY\n );\n const parsedTexCoord = expressionToGlsl(\n vertContext,\n texCoord,\n ValueTypes.NUMBER_ARRAY\n );\n const parsedRotation = expressionToGlsl(\n vertContext,\n rotation,\n ValueTypes.NUMBER\n );\n\n /**\n * @type {import(\"../style/expressions.js\").ParsingContext}\n */\n const fragContext = {\n inFragmentShader: true,\n variables: vertContext.variables,\n attributes: [],\n stringLiteralsMap: vertContext.stringLiteralsMap,\n functions: {},\n };\n const parsedColor = expressionToGlsl(fragContext, color, ValueTypes.COLOR);\n const parsedOpacity = expressionToGlsl(\n fragContext,\n opacity,\n ValueTypes.NUMBER\n );\n\n let opacityFilter = '1.0';\n const visibleSize = `vec2(${expressionToGlsl(\n fragContext,\n size,\n ValueTypes.NUMBER_ARRAY | ValueTypes.NUMBER\n )}).x`;\n switch (symbStyle.symbolType) {\n case 'square':\n break;\n case 'image':\n break;\n // taken from https://thebookofshaders.com/07/\n case 'circle':\n opacityFilter = `(1.0-smoothstep(1.-4./${visibleSize},1.,dot(v_quadCoord-.5,v_quadCoord-.5)*4.))`;\n break;\n case 'triangle':\n const st = '(v_quadCoord*2.-1.)';\n const a = `(atan(${st}.x,${st}.y))`;\n opacityFilter = `(1.0-smoothstep(.5-3./${visibleSize},.5,cos(floor(.5+${a}/2.094395102)*2.094395102-${a})*length(${st})))`;\n break;\n\n default:\n throw new Error('Unexpected symbol type: ' + symbStyle.symbolType);\n }\n\n const builder = new ShaderBuilder()\n .setSizeExpression(`vec2(${parsedSize})`)\n .setRotationExpression(parsedRotation)\n .setSymbolOffsetExpression(parsedOffset)\n .setTextureCoordinateExpression(parsedTexCoord)\n .setSymbolRotateWithView(!!symbStyle.rotateWithView)\n .setColorExpression(\n `vec4(${parsedColor}.rgb, ${parsedColor}.a * ${parsedOpacity} * ${opacityFilter})`\n );\n\n if (style.filter) {\n const parsedFilter = expressionToGlsl(\n fragContext,\n style.filter,\n ValueTypes.BOOLEAN\n );\n builder.setFragmentDiscardExpression(`!${parsedFilter}`);\n }\n\n /** @type {Object} */\n const uniforms = {};\n\n // define one uniform per variable\n fragContext.variables.forEach(function (varName) {\n const uniformName = uniformNameForVariable(varName);\n builder.addUniform(`float ${uniformName}`);\n uniforms[uniformName] = function () {\n if (!style.variables || style.variables[varName] === undefined) {\n throw new Error(\n `The following variable is missing from the style: ${varName}`\n );\n }\n let value = style.variables[varName];\n if (typeof value === 'string') {\n value = getStringNumberEquivalent(vertContext, value);\n }\n return value !== undefined ? value : -9999999; // to avoid matching with the first string literal\n };\n });\n\n if (symbStyle.symbolType === 'image' && symbStyle.src) {\n const texture = new Image();\n texture.crossOrigin =\n symbStyle.crossOrigin === undefined ? 'anonymous' : symbStyle.crossOrigin;\n texture.src = symbStyle.src;\n builder\n .addUniform('sampler2D u_texture')\n .setColorExpression(\n builder.getColorExpression() + ' * texture2D(u_texture, v_texCoord)'\n );\n uniforms['u_texture'] = texture;\n }\n\n // for each feature attribute used in the fragment shader, define a varying that will be used to pass data\n // from the vertex to the fragment shader, as well as an attribute in the vertex shader (if not already present)\n fragContext.attributes.forEach(function (attrName) {\n if (!vertContext.attributes.includes(attrName)) {\n vertContext.attributes.push(attrName);\n }\n builder.addVarying(`v_${attrName}`, 'float', `a_${attrName}`);\n });\n\n // for each feature attribute used in the vertex shader, define an attribute in the vertex shader.\n vertContext.attributes.forEach(function (attrName) {\n builder.addAttribute(`float a_${attrName}`);\n });\n\n return {\n builder: builder,\n attributes: vertContext.attributes.map(function (attributeName) {\n return {\n name: attributeName,\n callback: function (feature, props) {\n let value = props[attributeName];\n if (typeof value === 'string') {\n value = getStringNumberEquivalent(vertContext, value);\n }\n return value !== undefined ? value : -9999999; // to avoid matching with the first string literal\n },\n };\n }),\n uniforms: uniforms,\n };\n}\n","/**\n * @module ol/style/Image\n */\nimport {abstract} from '../util.js';\nimport {toSize} from '../size.js';\n\n/**\n * @typedef {Object} Options\n * @property {number} opacity Opacity.\n * @property {boolean} rotateWithView If the image should get rotated with the view.\n * @property {number} rotation Rotation.\n * @property {number|import(\"../size.js\").Size} scale Scale.\n * @property {Array} displacement Displacement.\n * @property {\"declutter\"|\"obstacle\"|\"none\"|undefined} declutterMode Declutter mode: `declutter`, `obstacle`, 'none */\n\n/**\n * @classdesc\n * A base class used for creating subclasses and not instantiated in\n * apps. Base class for {@link module:ol/style/Icon~Icon}, {@link module:ol/style/Circle~CircleStyle} and\n * {@link module:ol/style/RegularShape~RegularShape}.\n * @abstract\n * @api\n */\nclass ImageStyle {\n /**\n * @param {Options} options Options.\n */\n constructor(options) {\n /**\n * @private\n * @type {number}\n */\n this.opacity_ = options.opacity;\n\n /**\n * @private\n * @type {boolean}\n */\n this.rotateWithView_ = options.rotateWithView;\n\n /**\n * @private\n * @type {number}\n */\n this.rotation_ = options.rotation;\n\n /**\n * @private\n * @type {number|import(\"../size.js\").Size}\n */\n this.scale_ = options.scale;\n\n /**\n * @private\n * @type {import(\"../size.js\").Size}\n */\n this.scaleArray_ = toSize(options.scale);\n\n /**\n * @private\n * @type {Array}\n */\n this.displacement_ = options.displacement;\n\n /**\n * @private\n * @type {\"declutter\"|\"obstacle\"|\"none\"|undefined}\n */\n this.declutterMode_ = options.declutterMode;\n }\n\n /**\n * Clones the style.\n * @return {ImageStyle} The cloned style.\n * @api\n */\n clone() {\n const scale = this.getScale();\n return new ImageStyle({\n opacity: this.getOpacity(),\n scale: Array.isArray(scale) ? scale.slice() : scale,\n rotation: this.getRotation(),\n rotateWithView: this.getRotateWithView(),\n displacement: this.getDisplacement().slice(),\n declutterMode: this.getDeclutterMode(),\n });\n }\n\n /**\n * Get the symbolizer opacity.\n * @return {number} Opacity.\n * @api\n */\n getOpacity() {\n return this.opacity_;\n }\n\n /**\n * Determine whether the symbolizer rotates with the map.\n * @return {boolean} Rotate with map.\n * @api\n */\n getRotateWithView() {\n return this.rotateWithView_;\n }\n\n /**\n * Get the symoblizer rotation.\n * @return {number} Rotation.\n * @api\n */\n getRotation() {\n return this.rotation_;\n }\n\n /**\n * Get the symbolizer scale.\n * @return {number|import(\"../size.js\").Size} Scale.\n * @api\n */\n getScale() {\n return this.scale_;\n }\n\n /**\n * Get the symbolizer scale array.\n * @return {import(\"../size.js\").Size} Scale array.\n */\n getScaleArray() {\n return this.scaleArray_;\n }\n\n /**\n * Get the displacement of the shape\n * @return {Array} Shape's center displacement\n * @api\n */\n getDisplacement() {\n return this.displacement_;\n }\n\n /**\n * Get the declutter mode of the shape\n * @return {\"declutter\"|\"obstacle\"|\"none\"|undefined} Shape's declutter mode\n * @api\n */\n getDeclutterMode() {\n return this.declutterMode_;\n }\n\n /**\n * Get the anchor point in pixels. The anchor determines the center point for the\n * symbolizer.\n * @abstract\n * @return {Array} Anchor.\n */\n getAnchor() {\n return abstract();\n }\n\n /**\n * Get the image element for the symbolizer.\n * @abstract\n * @param {number} pixelRatio Pixel ratio.\n * @return {HTMLCanvasElement|HTMLVideoElement|HTMLImageElement} Image element.\n */\n getImage(pixelRatio) {\n return abstract();\n }\n\n /**\n * @abstract\n * @return {HTMLCanvasElement|HTMLVideoElement|HTMLImageElement} Image element.\n */\n getHitDetectionImage() {\n return abstract();\n }\n\n /**\n * Get the image pixel ratio.\n * @param {number} pixelRatio Pixel ratio.\n * @return {number} Pixel ratio.\n */\n getPixelRatio(pixelRatio) {\n return 1;\n }\n\n /**\n * @abstract\n * @return {import(\"../ImageState.js\").default} Image state.\n */\n getImageState() {\n return abstract();\n }\n\n /**\n * @abstract\n * @return {import(\"../size.js\").Size} Image size.\n */\n getImageSize() {\n return abstract();\n }\n\n /**\n * Get the origin of the symbolizer.\n * @abstract\n * @return {Array} Origin.\n */\n getOrigin() {\n return abstract();\n }\n\n /**\n * Get the size of the symbolizer (in pixels).\n * @abstract\n * @return {import(\"../size.js\").Size} Size.\n */\n getSize() {\n return abstract();\n }\n\n /**\n * Set the displacement.\n *\n * @param {Array} displacement Displacement.\n * @api\n */\n setDisplacement(displacement) {\n this.displacement_ = displacement;\n }\n\n /**\n * Set the opacity.\n *\n * @param {number} opacity Opacity.\n * @api\n */\n setOpacity(opacity) {\n this.opacity_ = opacity;\n }\n\n /**\n * Set whether to rotate the style with the view.\n *\n * @param {boolean} rotateWithView Rotate with map.\n * @api\n */\n setRotateWithView(rotateWithView) {\n this.rotateWithView_ = rotateWithView;\n }\n\n /**\n * Set the rotation.\n *\n * @param {number} rotation Rotation.\n * @api\n */\n setRotation(rotation) {\n this.rotation_ = rotation;\n }\n\n /**\n * Set the scale.\n *\n * @param {number|import(\"../size.js\").Size} scale Scale.\n * @api\n */\n setScale(scale) {\n this.scale_ = scale;\n this.scaleArray_ = toSize(scale);\n }\n\n /**\n * @abstract\n * @param {function(import(\"../events/Event.js\").default): void} listener Listener function.\n */\n listenImageChange(listener) {\n abstract();\n }\n\n /**\n * Load not yet loaded URI.\n * @abstract\n */\n load() {\n abstract();\n }\n\n /**\n * @abstract\n * @param {function(import(\"../events/Event.js\").default): void} listener Listener function.\n */\n unlistenImageChange(listener) {\n abstract();\n }\n}\n\nexport default ImageStyle;\n","/**\n * @module ol/style/RegularShape\n */\n\nimport ImageState from '../ImageState.js';\nimport ImageStyle from './Image.js';\nimport {asArray} from '../color.js';\nimport {asColorLike} from '../colorlike.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {\n defaultFillStyle,\n defaultLineJoin,\n defaultLineWidth,\n defaultMiterLimit,\n defaultStrokeStyle,\n} from '../render/canvas.js';\n\n/**\n * Specify radius for regular polygons, or radius1 and radius2 for stars.\n * @typedef {Object} Options\n * @property {import(\"./Fill.js\").default} [fill] Fill style.\n * @property {number} points Number of points for stars and regular polygons. In case of a polygon, the number of points\n * is the number of sides.\n * @property {number} [radius] Radius of a regular polygon.\n * @property {number} [radius1] First radius of a star. Ignored if radius is set.\n * @property {number} [radius2] Second radius of a star.\n * @property {number} [angle=0] Shape's angle in radians. A value of 0 will have one of the shape's points facing up.\n * @property {Array} [displacement=[0, 0]] Displacement of the shape in pixels.\n * Positive values will shift the shape right and up.\n * @property {import(\"./Stroke.js\").default} [stroke] Stroke style.\n * @property {number} [rotation=0] Rotation in radians (positive rotation clockwise).\n * @property {boolean} [rotateWithView=false] Whether to rotate the shape with the view.\n * @property {number|import(\"../size.js\").Size} [scale=1] Scale. Unless two dimensional scaling is required a better\n * result may be obtained with appropriate settings for `radius`, `radius1` and `radius2`.\n * @property {\"declutter\"|\"obstacle\"|\"none\"|undefined} [declutterMode] Declutter mode.\n */\n\n/**\n * @typedef {Object} RenderOptions\n * @property {import(\"../colorlike.js\").ColorLike} [strokeStyle] StrokeStyle.\n * @property {number} strokeWidth StrokeWidth.\n * @property {number} size Size.\n * @property {Array|null} lineDash LineDash.\n * @property {number} lineDashOffset LineDashOffset.\n * @property {CanvasLineJoin} lineJoin LineJoin.\n * @property {number} miterLimit MiterLimit.\n */\n\n/**\n * @classdesc\n * Set regular shape style for vector features. The resulting shape will be\n * a regular polygon when `radius` is provided, or a star when `radius1` and\n * `radius2` are provided.\n * @api\n */\nclass RegularShape extends ImageStyle {\n /**\n * @param {Options} options Options.\n */\n constructor(options) {\n /**\n * @type {boolean}\n */\n const rotateWithView =\n options.rotateWithView !== undefined ? options.rotateWithView : false;\n\n super({\n opacity: 1,\n rotateWithView: rotateWithView,\n rotation: options.rotation !== undefined ? options.rotation : 0,\n scale: options.scale !== undefined ? options.scale : 1,\n displacement:\n options.displacement !== undefined ? options.displacement : [0, 0],\n declutterMode: options.declutterMode,\n });\n\n /**\n * @private\n * @type {Object}\n */\n this.canvas_ = undefined;\n\n /**\n * @private\n * @type {HTMLCanvasElement}\n */\n this.hitDetectionCanvas_ = null;\n\n /**\n * @private\n * @type {import(\"./Fill.js\").default}\n */\n this.fill_ = options.fill !== undefined ? options.fill : null;\n\n /**\n * @private\n * @type {Array}\n */\n this.origin_ = [0, 0];\n\n /**\n * @private\n * @type {number}\n */\n this.points_ = options.points;\n\n /**\n * @protected\n * @type {number}\n */\n this.radius_ =\n options.radius !== undefined ? options.radius : options.radius1;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.radius2_ = options.radius2;\n\n /**\n * @private\n * @type {number}\n */\n this.angle_ = options.angle !== undefined ? options.angle : 0;\n\n /**\n * @private\n * @type {import(\"./Stroke.js\").default}\n */\n this.stroke_ = options.stroke !== undefined ? options.stroke : null;\n\n /**\n * @private\n * @type {import(\"../size.js\").Size}\n */\n this.size_ = null;\n\n /**\n * @private\n * @type {RenderOptions}\n */\n this.renderOptions_ = null;\n\n this.render();\n }\n\n /**\n * Clones the style.\n * @return {RegularShape} The cloned style.\n * @api\n */\n clone() {\n const scale = this.getScale();\n const style = new RegularShape({\n fill: this.getFill() ? this.getFill().clone() : undefined,\n points: this.getPoints(),\n radius: this.getRadius(),\n radius2: this.getRadius2(),\n angle: this.getAngle(),\n stroke: this.getStroke() ? this.getStroke().clone() : undefined,\n rotation: this.getRotation(),\n rotateWithView: this.getRotateWithView(),\n scale: Array.isArray(scale) ? scale.slice() : scale,\n displacement: this.getDisplacement().slice(),\n declutterMode: this.getDeclutterMode(),\n });\n style.setOpacity(this.getOpacity());\n return style;\n }\n\n /**\n * Get the anchor point in pixels. The anchor determines the center point for the\n * symbolizer.\n * @return {Array} Anchor.\n * @api\n */\n getAnchor() {\n const size = this.size_;\n if (!size) {\n return null;\n }\n const displacement = this.getDisplacement();\n const scale = this.getScaleArray();\n // anchor is scaled by renderer but displacement should not be scaled\n // so divide by scale here\n return [\n size[0] / 2 - displacement[0] / scale[0],\n size[1] / 2 + displacement[1] / scale[1],\n ];\n }\n\n /**\n * Get the angle used in generating the shape.\n * @return {number} Shape's rotation in radians.\n * @api\n */\n getAngle() {\n return this.angle_;\n }\n\n /**\n * Get the fill style for the shape.\n * @return {import(\"./Fill.js\").default} Fill style.\n * @api\n */\n getFill() {\n return this.fill_;\n }\n\n /**\n * Set the fill style.\n * @param {import(\"./Fill.js\").default} fill Fill style.\n * @api\n */\n setFill(fill) {\n this.fill_ = fill;\n this.render();\n }\n\n /**\n * @return {HTMLCanvasElement} Image element.\n */\n getHitDetectionImage() {\n if (!this.hitDetectionCanvas_) {\n this.createHitDetectionCanvas_(this.renderOptions_);\n }\n return this.hitDetectionCanvas_;\n }\n\n /**\n * Get the image icon.\n * @param {number} pixelRatio Pixel ratio.\n * @return {HTMLCanvasElement} Image or Canvas element.\n * @api\n */\n getImage(pixelRatio) {\n let image = this.canvas_[pixelRatio];\n if (!image) {\n const renderOptions = this.renderOptions_;\n const context = createCanvasContext2D(\n renderOptions.size * pixelRatio,\n renderOptions.size * pixelRatio\n );\n this.draw_(renderOptions, context, pixelRatio);\n\n image = context.canvas;\n this.canvas_[pixelRatio] = image;\n }\n return image;\n }\n\n /**\n * Get the image pixel ratio.\n * @param {number} pixelRatio Pixel ratio.\n * @return {number} Pixel ratio.\n */\n getPixelRatio(pixelRatio) {\n return pixelRatio;\n }\n\n /**\n * @return {import(\"../size.js\").Size} Image size.\n */\n getImageSize() {\n return this.size_;\n }\n\n /**\n * @return {import(\"../ImageState.js\").default} Image state.\n */\n getImageState() {\n return ImageState.LOADED;\n }\n\n /**\n * Get the origin of the symbolizer.\n * @return {Array} Origin.\n * @api\n */\n getOrigin() {\n return this.origin_;\n }\n\n /**\n * Get the number of points for generating the shape.\n * @return {number} Number of points for stars and regular polygons.\n * @api\n */\n getPoints() {\n return this.points_;\n }\n\n /**\n * Get the (primary) radius for the shape.\n * @return {number} Radius.\n * @api\n */\n getRadius() {\n return this.radius_;\n }\n\n /**\n * Get the secondary radius for the shape.\n * @return {number|undefined} Radius2.\n * @api\n */\n getRadius2() {\n return this.radius2_;\n }\n\n /**\n * Get the size of the symbolizer (in pixels).\n * @return {import(\"../size.js\").Size} Size.\n * @api\n */\n getSize() {\n return this.size_;\n }\n\n /**\n * Get the stroke style for the shape.\n * @return {import(\"./Stroke.js\").default} Stroke style.\n * @api\n */\n getStroke() {\n return this.stroke_;\n }\n\n /**\n * Set the stroke style.\n * @param {import(\"./Stroke.js\").default} stroke Stroke style.\n * @api\n */\n setStroke(stroke) {\n this.stroke_ = stroke;\n this.render();\n }\n\n /**\n * @param {function(import(\"../events/Event.js\").default): void} listener Listener function.\n */\n listenImageChange(listener) {}\n\n /**\n * Load not yet loaded URI.\n */\n load() {}\n\n /**\n * @param {function(import(\"../events/Event.js\").default): void} listener Listener function.\n */\n unlistenImageChange(listener) {}\n\n /**\n * Calculate additional canvas size needed for the miter.\n * @param {string} lineJoin Line join\n * @param {number} strokeWidth Stroke width\n * @param {number} miterLimit Miter limit\n * @return {number} Additional canvas size needed\n * @private\n */\n calculateLineJoinSize_(lineJoin, strokeWidth, miterLimit) {\n if (\n strokeWidth === 0 ||\n this.points_ === Infinity ||\n (lineJoin !== 'bevel' && lineJoin !== 'miter')\n ) {\n return strokeWidth;\n }\n // m | ^\n // i | |\\ .\n // t >| #\\\n // e | |\\ \\ .\n // r \\s\\\n // | \\t\\ . .\n // \\r\\ . .\n // | \\o\\ . . . . .\n // e \\k\\ . . . .\n // | \\e\\ . . . . .\n // d \\ \\ . . . .\n // | _ _a_ _\\# . . .\n // r1 / ` . .\n // | . .\n // b / . .\n // | . .\n // / r2 . .\n // | . .\n // / . .\n // |α . .\n // / . .\n // ° center\n let r1 = this.radius_;\n let r2 = this.radius2_ === undefined ? r1 : this.radius2_;\n if (r1 < r2) {\n const tmp = r1;\n r1 = r2;\n r2 = tmp;\n }\n const points =\n this.radius2_ === undefined ? this.points_ : this.points_ * 2;\n const alpha = (2 * Math.PI) / points;\n const a = r2 * Math.sin(alpha);\n const b = Math.sqrt(r2 * r2 - a * a);\n const d = r1 - b;\n const e = Math.sqrt(a * a + d * d);\n const miterRatio = e / a;\n if (lineJoin === 'miter' && miterRatio <= miterLimit) {\n return miterRatio * strokeWidth;\n }\n // Calculate the distnce from center to the stroke corner where\n // it was cut short because of the miter limit.\n // l\n // ----+---- <= distance from center to here is maxr\n // /####|k ##\\\n // /#####^#####\\\n // /#### /+\\# s #\\\n // /### h/+++\\# t #\\\n // /### t/+++++\\# r #\\\n // /### a/+++++++\\# o #\\\n // /### p/++ fill +\\# k #\\\n ///#### /+++++^+++++\\# e #\\\n //#####/+++++/+\\+++++\\#####\\\n const k = strokeWidth / 2 / miterRatio;\n const l = (strokeWidth / 2) * (d / e);\n const maxr = Math.sqrt((r1 + k) * (r1 + k) + l * l);\n const bevelAdd = maxr - r1;\n if (this.radius2_ === undefined || lineJoin === 'bevel') {\n return bevelAdd * 2;\n }\n // If outer miter is over the miter limit the inner miter may reach through the\n // center and be longer than the bevel, same calculation as above but swap r1 / r2.\n const aa = r1 * Math.sin(alpha);\n const bb = Math.sqrt(r1 * r1 - aa * aa);\n const dd = r2 - bb;\n const ee = Math.sqrt(aa * aa + dd * dd);\n const innerMiterRatio = ee / aa;\n if (innerMiterRatio <= miterLimit) {\n const innerLength = (innerMiterRatio * strokeWidth) / 2 - r2 - r1;\n return 2 * Math.max(bevelAdd, innerLength);\n }\n return bevelAdd * 2;\n }\n\n /**\n * @return {RenderOptions} The render options\n * @protected\n */\n createRenderOptions() {\n let lineJoin = defaultLineJoin;\n let miterLimit = 0;\n let lineDash = null;\n let lineDashOffset = 0;\n let strokeStyle;\n let strokeWidth = 0;\n\n if (this.stroke_) {\n strokeStyle = this.stroke_.getColor();\n if (strokeStyle === null) {\n strokeStyle = defaultStrokeStyle;\n }\n strokeStyle = asColorLike(strokeStyle);\n strokeWidth = this.stroke_.getWidth();\n if (strokeWidth === undefined) {\n strokeWidth = defaultLineWidth;\n }\n lineDash = this.stroke_.getLineDash();\n lineDashOffset = this.stroke_.getLineDashOffset();\n lineJoin = this.stroke_.getLineJoin();\n if (lineJoin === undefined) {\n lineJoin = defaultLineJoin;\n }\n miterLimit = this.stroke_.getMiterLimit();\n if (miterLimit === undefined) {\n miterLimit = defaultMiterLimit;\n }\n }\n\n const add = this.calculateLineJoinSize_(lineJoin, strokeWidth, miterLimit);\n const maxRadius = Math.max(this.radius_, this.radius2_ || 0);\n const size = Math.ceil(2 * maxRadius + add);\n\n return {\n strokeStyle: strokeStyle,\n strokeWidth: strokeWidth,\n size: size,\n lineDash: lineDash,\n lineDashOffset: lineDashOffset,\n lineJoin: lineJoin,\n miterLimit: miterLimit,\n };\n }\n\n /**\n * @protected\n */\n render() {\n this.renderOptions_ = this.createRenderOptions();\n const size = this.renderOptions_.size;\n this.canvas_ = {};\n this.size_ = [size, size];\n }\n\n /**\n * @private\n * @param {RenderOptions} renderOptions Render options.\n * @param {CanvasRenderingContext2D} context The rendering context.\n * @param {number} pixelRatio The pixel ratio.\n */\n draw_(renderOptions, context, pixelRatio) {\n context.scale(pixelRatio, pixelRatio);\n // set origin to canvas center\n context.translate(renderOptions.size / 2, renderOptions.size / 2);\n\n this.createPath_(context);\n\n if (this.fill_) {\n let color = this.fill_.getColor();\n if (color === null) {\n color = defaultFillStyle;\n }\n context.fillStyle = asColorLike(color);\n context.fill();\n }\n if (this.stroke_) {\n context.strokeStyle = renderOptions.strokeStyle;\n context.lineWidth = renderOptions.strokeWidth;\n if (renderOptions.lineDash) {\n context.setLineDash(renderOptions.lineDash);\n context.lineDashOffset = renderOptions.lineDashOffset;\n }\n context.lineJoin = renderOptions.lineJoin;\n context.miterLimit = renderOptions.miterLimit;\n context.stroke();\n }\n }\n\n /**\n * @private\n * @param {RenderOptions} renderOptions Render options.\n */\n createHitDetectionCanvas_(renderOptions) {\n if (this.fill_) {\n let color = this.fill_.getColor();\n\n // determine if fill is transparent (or pattern or gradient)\n let opacity = 0;\n if (typeof color === 'string') {\n color = asArray(color);\n }\n if (color === null) {\n opacity = 1;\n } else if (Array.isArray(color)) {\n opacity = color.length === 4 ? color[3] : 1;\n }\n if (opacity === 0) {\n // if a transparent fill style is set, create an extra hit-detection image\n // with a default fill style\n const context = createCanvasContext2D(\n renderOptions.size,\n renderOptions.size\n );\n this.hitDetectionCanvas_ = context.canvas;\n\n this.drawHitDetectionCanvas_(renderOptions, context);\n }\n }\n if (!this.hitDetectionCanvas_) {\n this.hitDetectionCanvas_ = this.getImage(1);\n }\n }\n\n /**\n * @private\n * @param {CanvasRenderingContext2D} context The context to draw in.\n */\n createPath_(context) {\n let points = this.points_;\n const radius = this.radius_;\n if (points === Infinity) {\n context.arc(0, 0, radius, 0, 2 * Math.PI);\n } else {\n const radius2 = this.radius2_ === undefined ? radius : this.radius2_;\n if (this.radius2_ !== undefined) {\n points *= 2;\n }\n const startAngle = this.angle_ - Math.PI / 2;\n const step = (2 * Math.PI) / points;\n for (let i = 0; i < points; i++) {\n const angle0 = startAngle + i * step;\n const radiusC = i % 2 === 0 ? radius : radius2;\n context.lineTo(radiusC * Math.cos(angle0), radiusC * Math.sin(angle0));\n }\n context.closePath();\n }\n }\n\n /**\n * @private\n * @param {RenderOptions} renderOptions Render options.\n * @param {CanvasRenderingContext2D} context The context.\n */\n drawHitDetectionCanvas_(renderOptions, context) {\n // set origin to canvas center\n context.translate(renderOptions.size / 2, renderOptions.size / 2);\n\n this.createPath_(context);\n\n context.fillStyle = defaultFillStyle;\n context.fill();\n if (this.stroke_) {\n context.strokeStyle = renderOptions.strokeStyle;\n context.lineWidth = renderOptions.strokeWidth;\n if (renderOptions.lineDash) {\n context.setLineDash(renderOptions.lineDash);\n context.lineDashOffset = renderOptions.lineDashOffset;\n }\n context.lineJoin = renderOptions.lineJoin;\n context.miterLimit = renderOptions.miterLimit;\n context.stroke();\n }\n }\n}\n\nexport default RegularShape;\n","/**\n * @module ol/style/Circle\n */\n\nimport RegularShape from './RegularShape.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Fill.js\").default} [fill] Fill style.\n * @property {number} radius Circle radius.\n * @property {import(\"./Stroke.js\").default} [stroke] Stroke style.\n * @property {Array} [displacement=[0,0]] displacement\n * @property {number|import(\"../size.js\").Size} [scale=1] Scale. A two dimensional scale will produce an ellipse.\n * Unless two dimensional scaling is required a better result may be obtained with an appropriate setting for `radius`.\n * @property {number} [rotation=0] Rotation in radians\n * (positive rotation clockwise, meaningful only when used in conjunction with a two dimensional scale).\n * @property {boolean} [rotateWithView=false] Whether to rotate the shape with the view\n * (meaningful only when used in conjunction with a two dimensional scale).\n * @property {\"declutter\"|\"obstacle\"|\"none\"|undefined} [declutterMode] Declutter mode\n */\n\n/**\n * @classdesc\n * Set circle style for vector features.\n * @api\n */\nclass CircleStyle extends RegularShape {\n /**\n * @param {Options} [options] Options.\n */\n constructor(options) {\n options = options ? options : {radius: 5};\n\n super({\n points: Infinity,\n fill: options.fill,\n radius: options.radius,\n stroke: options.stroke,\n scale: options.scale !== undefined ? options.scale : 1,\n rotation: options.rotation !== undefined ? options.rotation : 0,\n rotateWithView:\n options.rotateWithView !== undefined ? options.rotateWithView : false,\n displacement:\n options.displacement !== undefined ? options.displacement : [0, 0],\n declutterMode: options.declutterMode,\n });\n }\n\n /**\n * Clones the style.\n * @return {CircleStyle} The cloned style.\n * @api\n */\n clone() {\n const scale = this.getScale();\n const style = new CircleStyle({\n fill: this.getFill() ? this.getFill().clone() : undefined,\n stroke: this.getStroke() ? this.getStroke().clone() : undefined,\n radius: this.getRadius(),\n scale: Array.isArray(scale) ? scale.slice() : scale,\n rotation: this.getRotation(),\n rotateWithView: this.getRotateWithView(),\n displacement: this.getDisplacement().slice(),\n declutterMode: this.getDeclutterMode(),\n });\n style.setOpacity(this.getOpacity());\n return style;\n }\n\n /**\n * Set the circle radius.\n *\n * @param {number} radius Circle radius.\n * @api\n */\n setRadius(radius) {\n this.radius_ = radius;\n this.render();\n }\n}\n\nexport default CircleStyle;\n","/**\n * @module ol/style/Fill\n */\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike|null} [color=null] A color, gradient or pattern.\n * See {@link module:ol/color~Color} and {@link module:ol/colorlike~ColorLike} for possible formats.\n * Default null; if null, the Canvas/renderer default black will be used.\n */\n\n/**\n * @classdesc\n * Set fill style for vector features.\n * @api\n */\nclass Fill {\n /**\n * @param {Options} [options] Options.\n */\n constructor(options) {\n options = options || {};\n\n /**\n * @private\n * @type {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike|null}\n */\n this.color_ = options.color !== undefined ? options.color : null;\n }\n\n /**\n * Clones the style. The color is not cloned if it is an {@link module:ol/colorlike~ColorLike}.\n * @return {Fill} The cloned style.\n * @api\n */\n clone() {\n const color = this.getColor();\n return new Fill({\n color: Array.isArray(color) ? color.slice() : color || undefined,\n });\n }\n\n /**\n * Get the fill color.\n * @return {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike|null} Color.\n * @api\n */\n getColor() {\n return this.color_;\n }\n\n /**\n * Set the color.\n *\n * @param {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike|null} color Color.\n * @api\n */\n setColor(color) {\n this.color_ = color;\n }\n}\n\nexport default Fill;\n","/**\n * @module ol/style/IconImage\n */\n\nimport EventTarget from '../events/Target.js';\nimport EventType from '../events/EventType.js';\nimport ImageState from '../ImageState.js';\nimport {asString} from '../color.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {shared as iconImageCache} from './IconImageCache.js';\nimport {listenImage} from '../Image.js';\n\n/**\n * @type {CanvasRenderingContext2D}\n */\nlet taintedTestContext = null;\n\nclass IconImage extends EventTarget {\n /**\n * @param {HTMLImageElement|HTMLCanvasElement} image Image.\n * @param {string|undefined} src Src.\n * @param {import(\"../size.js\").Size} size Size.\n * @param {?string} crossOrigin Cross origin.\n * @param {import(\"../ImageState.js\").default} imageState Image state.\n * @param {import(\"../color.js\").Color} color Color.\n */\n constructor(image, src, size, crossOrigin, imageState, color) {\n super();\n\n /**\n * @private\n * @type {HTMLImageElement|HTMLCanvasElement}\n */\n this.hitDetectionImage_ = null;\n\n /**\n * @private\n * @type {HTMLImageElement|HTMLCanvasElement}\n */\n this.image_ = image;\n\n /**\n * @private\n * @type {string|null}\n */\n this.crossOrigin_ = crossOrigin;\n\n /**\n * @private\n * @type {Object}\n */\n this.canvas_ = {};\n\n /**\n * @private\n * @type {import(\"../color.js\").Color}\n */\n this.color_ = color;\n\n /**\n * @private\n * @type {?function():void}\n */\n this.unlisten_ = null;\n\n /**\n * @private\n * @type {import(\"../ImageState.js\").default}\n */\n this.imageState_ = imageState;\n\n /**\n * @private\n * @type {import(\"../size.js\").Size}\n */\n this.size_ = size;\n\n /**\n * @private\n * @type {string|undefined}\n */\n this.src_ = src;\n\n /**\n * @private\n */\n this.tainted_;\n }\n\n /**\n * @private\n */\n initializeImage_() {\n this.image_ = new Image();\n if (this.crossOrigin_ !== null) {\n this.image_.crossOrigin = this.crossOrigin_;\n }\n }\n\n /**\n * @private\n * @return {boolean} The image canvas is tainted.\n */\n isTainted_() {\n if (this.tainted_ === undefined && this.imageState_ === ImageState.LOADED) {\n if (!taintedTestContext) {\n taintedTestContext = createCanvasContext2D(1, 1, undefined, {\n willReadFrequently: true,\n });\n }\n taintedTestContext.drawImage(this.image_, 0, 0);\n try {\n taintedTestContext.getImageData(0, 0, 1, 1);\n this.tainted_ = false;\n } catch (e) {\n taintedTestContext = null;\n this.tainted_ = true;\n }\n }\n return this.tainted_ === true;\n }\n\n /**\n * @private\n */\n dispatchChangeEvent_() {\n this.dispatchEvent(EventType.CHANGE);\n }\n\n /**\n * @private\n */\n handleImageError_() {\n this.imageState_ = ImageState.ERROR;\n this.unlistenImage_();\n this.dispatchChangeEvent_();\n }\n\n /**\n * @private\n */\n handleImageLoad_() {\n this.imageState_ = ImageState.LOADED;\n if (this.size_) {\n this.image_.width = this.size_[0];\n this.image_.height = this.size_[1];\n } else {\n this.size_ = [this.image_.width, this.image_.height];\n }\n this.unlistenImage_();\n this.dispatchChangeEvent_();\n }\n\n /**\n * @param {number} pixelRatio Pixel ratio.\n * @return {HTMLImageElement|HTMLCanvasElement} Image or Canvas element.\n */\n getImage(pixelRatio) {\n if (!this.image_) {\n this.initializeImage_();\n }\n this.replaceColor_(pixelRatio);\n return this.canvas_[pixelRatio] ? this.canvas_[pixelRatio] : this.image_;\n }\n\n /**\n * @param {number} pixelRatio Pixel ratio.\n * @return {number} Image or Canvas element.\n */\n getPixelRatio(pixelRatio) {\n this.replaceColor_(pixelRatio);\n return this.canvas_[pixelRatio] ? pixelRatio : 1;\n }\n\n /**\n * @return {import(\"../ImageState.js\").default} Image state.\n */\n getImageState() {\n return this.imageState_;\n }\n\n /**\n * @return {HTMLImageElement|HTMLCanvasElement} Image element.\n */\n getHitDetectionImage() {\n if (!this.image_) {\n this.initializeImage_();\n }\n if (!this.hitDetectionImage_) {\n if (this.isTainted_()) {\n const width = this.size_[0];\n const height = this.size_[1];\n const context = createCanvasContext2D(width, height);\n context.fillRect(0, 0, width, height);\n this.hitDetectionImage_ = context.canvas;\n } else {\n this.hitDetectionImage_ = this.image_;\n }\n }\n return this.hitDetectionImage_;\n }\n\n /**\n * Get the size of the icon (in pixels).\n * @return {import(\"../size.js\").Size} Image size.\n */\n getSize() {\n return this.size_;\n }\n\n /**\n * @return {string|undefined} Image src.\n */\n getSrc() {\n return this.src_;\n }\n\n /**\n * Load not yet loaded URI.\n */\n load() {\n if (this.imageState_ !== ImageState.IDLE) {\n return;\n }\n if (!this.image_) {\n this.initializeImage_();\n }\n\n this.imageState_ = ImageState.LOADING;\n try {\n /** @type {HTMLImageElement} */ (this.image_).src = this.src_;\n } catch (e) {\n this.handleImageError_();\n }\n this.unlisten_ = listenImage(\n this.image_,\n this.handleImageLoad_.bind(this),\n this.handleImageError_.bind(this)\n );\n }\n\n /**\n * @param {number} pixelRatio Pixel ratio.\n * @private\n */\n replaceColor_(pixelRatio) {\n if (\n !this.color_ ||\n this.canvas_[pixelRatio] ||\n this.imageState_ !== ImageState.LOADED\n ) {\n return;\n }\n\n const image = this.image_;\n const canvas = document.createElement('canvas');\n canvas.width = Math.ceil(image.width * pixelRatio);\n canvas.height = Math.ceil(image.height * pixelRatio);\n\n const ctx = canvas.getContext('2d');\n ctx.scale(pixelRatio, pixelRatio);\n ctx.drawImage(image, 0, 0);\n\n ctx.globalCompositeOperation = 'multiply';\n ctx.fillStyle = asString(this.color_);\n ctx.fillRect(0, 0, canvas.width / pixelRatio, canvas.height / pixelRatio);\n\n ctx.globalCompositeOperation = 'destination-in';\n ctx.drawImage(image, 0, 0);\n\n this.canvas_[pixelRatio] = canvas;\n }\n\n /**\n * Discards event handlers which listen for load completion or errors.\n *\n * @private\n */\n unlistenImage_() {\n if (this.unlisten_) {\n this.unlisten_();\n this.unlisten_ = null;\n }\n }\n}\n\n/**\n * @param {HTMLImageElement|HTMLCanvasElement} image Image.\n * @param {string} src Src.\n * @param {import(\"../size.js\").Size} size Size.\n * @param {?string} crossOrigin Cross origin.\n * @param {import(\"../ImageState.js\").default} imageState Image state.\n * @param {import(\"../color.js\").Color} color Color.\n * @return {IconImage} Icon image.\n */\nexport function get(image, src, size, crossOrigin, imageState, color) {\n let iconImage = iconImageCache.get(src, crossOrigin, color);\n if (!iconImage) {\n iconImage = new IconImage(image, src, size, crossOrigin, imageState, color);\n iconImageCache.set(src, crossOrigin, color, iconImage);\n }\n return iconImage;\n}\n\nexport default IconImage;\n","/**\n * @module ol/style/Icon\n */\nimport EventType from '../events/EventType.js';\nimport ImageState from '../ImageState.js';\nimport ImageStyle from './Image.js';\nimport {asArray} from '../color.js';\nimport {assert} from '../asserts.js';\nimport {get as getIconImage} from './IconImage.js';\nimport {getUid} from '../util.js';\n\n/**\n * @typedef {'fraction' | 'pixels'} IconAnchorUnits\n * Anchor unit can be either a fraction of the icon size or in pixels.\n */\n\n/**\n * @typedef {'bottom-left' | 'bottom-right' | 'top-left' | 'top-right'} IconOrigin\n * Icon origin. One of 'bottom-left', 'bottom-right', 'top-left', 'top-right'.\n */\n\n/**\n * @typedef {Object} Options\n * @property {Array} [anchor=[0.5, 0.5]] Anchor. Default value is the icon center.\n * @property {IconOrigin} [anchorOrigin='top-left'] Origin of the anchor: `bottom-left`, `bottom-right`,\n * `top-left` or `top-right`.\n * @property {IconAnchorUnits} [anchorXUnits='fraction'] Units in which the anchor x value is\n * specified. A value of `'fraction'` indicates the x value is a fraction of the icon. A value of `'pixels'` indicates\n * the x value in pixels.\n * @property {IconAnchorUnits} [anchorYUnits='fraction'] Units in which the anchor y value is\n * specified. A value of `'fraction'` indicates the y value is a fraction of the icon. A value of `'pixels'` indicates\n * the y value in pixels.\n * @property {import(\"../color.js\").Color|string} [color] Color to tint the icon. If not specified,\n * the icon will be left as is.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images. Note that you must provide a\n * `crossOrigin` value if you want to access pixel data with the Canvas renderer.\n * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {HTMLImageElement|HTMLCanvasElement} [img] Image object for the icon. If the `src` option is not provided then the\n * provided image must already be loaded. And in that case, it is required\n * to provide the size of the image, with the `imgSize` option.\n * @property {import(\"../size.js\").Size} [imgSize] Image size in pixels. Only required if `img` is set and `src` is not.\n * The provided `imgSize` needs to match the actual size of the image.\n * @property {Array} [displacement=[0, 0]] Displacement of the icon in pixels.\n * Positive values will shift the icon right and up.\n * @property {number} [opacity=1] Opacity of the icon.\n * @property {number} [width] The width of the icon in pixels. This can't be used together with `scale`.\n * @property {number} [height] The height of the icon in pixels. This can't be used together with `scale`.\n * @property {number|import(\"../size.js\").Size} [scale=1] Scale.\n * @property {boolean} [rotateWithView=false] Whether to rotate the icon with the view.\n * @property {number} [rotation=0] Rotation in radians (positive rotation clockwise).\n * @property {Array} [offset=[0, 0]] Offset which, together with `size` and `offsetOrigin`, defines the\n * sub-rectangle to use from the original (sprite) image.\n * @property {IconOrigin} [offsetOrigin='top-left'] Origin of the offset: `bottom-left`, `bottom-right`,\n * `top-left` or `top-right`.\n * @property {import(\"../size.js\").Size} [size] Icon size in pixels. Used together with `offset` to define the\n * sub-rectangle to use from the original (sprite) image.\n * @property {string} [src] Image source URI.\n * @property {\"declutter\"|\"obstacle\"|\"none\"|undefined} [declutterMode] Declutter mode.\n */\n\n/**\n * @classdesc\n * Set icon style for vector features.\n * @api\n */\nclass Icon extends ImageStyle {\n /**\n * @param {Options} [options] Options.\n */\n constructor(options) {\n options = options || {};\n\n /**\n * @type {number}\n */\n const opacity = options.opacity !== undefined ? options.opacity : 1;\n\n /**\n * @type {number}\n */\n const rotation = options.rotation !== undefined ? options.rotation : 0;\n\n /**\n * @type {number|import(\"../size.js\").Size}\n */\n const scale = options.scale !== undefined ? options.scale : 1;\n\n /**\n * @type {boolean}\n */\n const rotateWithView =\n options.rotateWithView !== undefined ? options.rotateWithView : false;\n\n super({\n opacity: opacity,\n rotation: rotation,\n scale: scale,\n displacement:\n options.displacement !== undefined ? options.displacement : [0, 0],\n rotateWithView: rotateWithView,\n declutterMode: options.declutterMode,\n });\n\n /**\n * @private\n * @type {Array}\n */\n this.anchor_ = options.anchor !== undefined ? options.anchor : [0.5, 0.5];\n\n /**\n * @private\n * @type {Array}\n */\n this.normalizedAnchor_ = null;\n\n /**\n * @private\n * @type {IconOrigin}\n */\n this.anchorOrigin_ =\n options.anchorOrigin !== undefined ? options.anchorOrigin : 'top-left';\n\n /**\n * @private\n * @type {IconAnchorUnits}\n */\n this.anchorXUnits_ =\n options.anchorXUnits !== undefined ? options.anchorXUnits : 'fraction';\n\n /**\n * @private\n * @type {IconAnchorUnits}\n */\n this.anchorYUnits_ =\n options.anchorYUnits !== undefined ? options.anchorYUnits : 'fraction';\n\n /**\n * @private\n * @type {?string}\n */\n this.crossOrigin_ =\n options.crossOrigin !== undefined ? options.crossOrigin : null;\n\n /**\n * @type {HTMLImageElement|HTMLCanvasElement}\n */\n const image = options.img !== undefined ? options.img : null;\n\n /**\n * @private\n * @type {import(\"../size.js\").Size|undefined}\n */\n this.imgSize_ = options.imgSize;\n\n /**\n * @type {string|undefined}\n */\n let src = options.src;\n\n assert(!(src !== undefined && image), 4); // `image` and `src` cannot be provided at the same time\n assert(!image || (image && this.imgSize_), 5); // `imgSize` must be set when `image` is provided\n\n if ((src === undefined || src.length === 0) && image) {\n src = /** @type {HTMLImageElement} */ (image).src || getUid(image);\n }\n assert(src !== undefined && src.length > 0, 6); // A defined and non-empty `src` or `image` must be provided\n\n // `width` or `height` cannot be provided together with `scale`\n assert(\n !(\n (options.width !== undefined || options.height !== undefined) &&\n options.scale !== undefined\n ),\n 69\n );\n\n /**\n * @type {import(\"../ImageState.js\").default}\n */\n const imageState =\n options.src !== undefined ? ImageState.IDLE : ImageState.LOADED;\n\n /**\n * @private\n * @type {import(\"../color.js\").Color}\n */\n this.color_ = options.color !== undefined ? asArray(options.color) : null;\n\n /**\n * @private\n * @type {import(\"./IconImage.js\").default}\n */\n this.iconImage_ = getIconImage(\n image,\n /** @type {string} */ (src),\n this.imgSize_ !== undefined ? this.imgSize_ : null,\n this.crossOrigin_,\n imageState,\n this.color_\n );\n\n /**\n * @private\n * @type {Array}\n */\n this.offset_ = options.offset !== undefined ? options.offset : [0, 0];\n /**\n * @private\n * @type {IconOrigin}\n */\n this.offsetOrigin_ =\n options.offsetOrigin !== undefined ? options.offsetOrigin : 'top-left';\n\n /**\n * @private\n * @type {Array}\n */\n this.origin_ = null;\n\n /**\n * @private\n * @type {import(\"../size.js\").Size}\n */\n this.size_ = options.size !== undefined ? options.size : null;\n\n /**\n * @type {number|undefined}\n */\n this.width_ = options.width;\n\n /**\n * @type {number|undefined}\n */\n this.height_ = options.height;\n\n /**\n * Recalculate the scale if width or height where given.\n */\n if (this.width_ !== undefined || this.height_ !== undefined) {\n const image = this.getImage(1);\n const setScale = () => {\n this.updateScaleFromWidthAndHeight(this.width_, this.height_);\n };\n if (image.width > 0) {\n this.updateScaleFromWidthAndHeight(this.width_, this.height_);\n } else {\n image.addEventListener('load', setScale);\n }\n }\n }\n\n /**\n * Clones the style. The underlying Image/HTMLCanvasElement is not cloned.\n * @return {Icon} The cloned style.\n * @api\n */\n clone() {\n const scale = this.getScale();\n return new Icon({\n anchor: this.anchor_.slice(),\n anchorOrigin: this.anchorOrigin_,\n anchorXUnits: this.anchorXUnits_,\n anchorYUnits: this.anchorYUnits_,\n color:\n this.color_ && this.color_.slice\n ? this.color_.slice()\n : this.color_ || undefined,\n crossOrigin: this.crossOrigin_,\n imgSize: this.imgSize_,\n offset: this.offset_.slice(),\n offsetOrigin: this.offsetOrigin_,\n opacity: this.getOpacity(),\n rotateWithView: this.getRotateWithView(),\n rotation: this.getRotation(),\n scale: Array.isArray(scale) ? scale.slice() : scale,\n size: this.size_ !== null ? this.size_.slice() : undefined,\n src: this.getSrc(),\n displacement: this.getDisplacement().slice(),\n declutterMode: this.getDeclutterMode(),\n width: this.width_,\n height: this.height_,\n });\n }\n\n /**\n * Set the scale of the Icon by calculating it from given width and height and the\n * width and height of the image.\n *\n * @private\n * @param {number} width The width.\n * @param {number} height The height.\n */\n updateScaleFromWidthAndHeight(width, height) {\n const image = this.getImage(1);\n if (width !== undefined && height !== undefined) {\n super.setScale([width / image.width, height / image.height]);\n } else if (width !== undefined) {\n super.setScale([width / image.width, width / image.width]);\n } else if (height !== undefined) {\n super.setScale([height / image.height, height / image.height]);\n } else {\n super.setScale([1, 1]);\n }\n }\n\n /**\n * Get the anchor point in pixels. The anchor determines the center point for the\n * symbolizer.\n * @return {Array} Anchor.\n * @api\n */\n getAnchor() {\n let anchor = this.normalizedAnchor_;\n if (!anchor) {\n anchor = this.anchor_;\n const size = this.getSize();\n if (\n this.anchorXUnits_ == 'fraction' ||\n this.anchorYUnits_ == 'fraction'\n ) {\n if (!size) {\n return null;\n }\n anchor = this.anchor_.slice();\n if (this.anchorXUnits_ == 'fraction') {\n anchor[0] *= size[0];\n }\n if (this.anchorYUnits_ == 'fraction') {\n anchor[1] *= size[1];\n }\n }\n\n if (this.anchorOrigin_ != 'top-left') {\n if (!size) {\n return null;\n }\n if (anchor === this.anchor_) {\n anchor = this.anchor_.slice();\n }\n if (\n this.anchorOrigin_ == 'top-right' ||\n this.anchorOrigin_ == 'bottom-right'\n ) {\n anchor[0] = -anchor[0] + size[0];\n }\n if (\n this.anchorOrigin_ == 'bottom-left' ||\n this.anchorOrigin_ == 'bottom-right'\n ) {\n anchor[1] = -anchor[1] + size[1];\n }\n }\n this.normalizedAnchor_ = anchor;\n }\n const displacement = this.getDisplacement();\n const scale = this.getScaleArray();\n // anchor is scaled by renderer but displacement should not be scaled\n // so divide by scale here\n return [\n anchor[0] - displacement[0] / scale[0],\n anchor[1] + displacement[1] / scale[1],\n ];\n }\n\n /**\n * Set the anchor point. The anchor determines the center point for the\n * symbolizer.\n *\n * @param {Array} anchor Anchor.\n * @api\n */\n setAnchor(anchor) {\n this.anchor_ = anchor;\n this.normalizedAnchor_ = null;\n }\n\n /**\n * Get the icon color.\n * @return {import(\"../color.js\").Color} Color.\n * @api\n */\n getColor() {\n return this.color_;\n }\n\n /**\n * Get the image icon.\n * @param {number} pixelRatio Pixel ratio.\n * @return {HTMLImageElement|HTMLCanvasElement} Image or Canvas element.\n * @api\n */\n getImage(pixelRatio) {\n return this.iconImage_.getImage(pixelRatio);\n }\n\n /**\n * Get the pixel ratio.\n * @param {number} pixelRatio Pixel ratio.\n * @return {number} The pixel ratio of the image.\n * @api\n */\n getPixelRatio(pixelRatio) {\n return this.iconImage_.getPixelRatio(pixelRatio);\n }\n\n /**\n * @return {import(\"../size.js\").Size} Image size.\n */\n getImageSize() {\n return this.iconImage_.getSize();\n }\n\n /**\n * @return {import(\"../ImageState.js\").default} Image state.\n */\n getImageState() {\n return this.iconImage_.getImageState();\n }\n\n /**\n * @return {HTMLImageElement|HTMLCanvasElement} Image element.\n */\n getHitDetectionImage() {\n return this.iconImage_.getHitDetectionImage();\n }\n\n /**\n * Get the origin of the symbolizer.\n * @return {Array} Origin.\n * @api\n */\n getOrigin() {\n if (this.origin_) {\n return this.origin_;\n }\n let offset = this.offset_;\n\n if (this.offsetOrigin_ != 'top-left') {\n const size = this.getSize();\n const iconImageSize = this.iconImage_.getSize();\n if (!size || !iconImageSize) {\n return null;\n }\n offset = offset.slice();\n if (\n this.offsetOrigin_ == 'top-right' ||\n this.offsetOrigin_ == 'bottom-right'\n ) {\n offset[0] = iconImageSize[0] - size[0] - offset[0];\n }\n if (\n this.offsetOrigin_ == 'bottom-left' ||\n this.offsetOrigin_ == 'bottom-right'\n ) {\n offset[1] = iconImageSize[1] - size[1] - offset[1];\n }\n }\n this.origin_ = offset;\n return this.origin_;\n }\n\n /**\n * Get the image URL.\n * @return {string|undefined} Image src.\n * @api\n */\n getSrc() {\n return this.iconImage_.getSrc();\n }\n\n /**\n * Get the size of the icon (in pixels).\n * @return {import(\"../size.js\").Size} Image size.\n * @api\n */\n getSize() {\n return !this.size_ ? this.iconImage_.getSize() : this.size_;\n }\n\n /**\n * Get the width of the icon (in pixels).\n * @return {number} Icon width (in pixels).\n * @api\n */\n getWidth() {\n return this.width_;\n }\n\n /**\n * Get the height of the icon (in pixels).\n * @return {number} Icon height (in pixels).\n * @api\n */\n getHeight() {\n return this.height_;\n }\n\n /**\n * Set the width of the icon in pixels.\n *\n * @param {number} width The width to set.\n */\n setWidth(width) {\n this.width_ = width;\n this.updateScaleFromWidthAndHeight(width, this.height_);\n }\n\n /**\n * Set the height of the icon in pixels.\n *\n * @param {number} height The height to set.\n */\n setHeight(height) {\n this.height_ = height;\n this.updateScaleFromWidthAndHeight(this.width_, height);\n }\n\n /**\n * Set the scale and updates the width and height correspondingly.\n *\n * @param {number|import(\"../size.js\").Size} scale Scale.\n * @override\n * @api\n */\n setScale(scale) {\n super.setScale(scale);\n const image = this.getImage(1);\n if (image) {\n const widthScale = Array.isArray(scale) ? scale[0] : scale;\n if (widthScale !== undefined) {\n this.width_ = widthScale * image.width;\n }\n const heightScale = Array.isArray(scale) ? scale[1] : scale;\n if (heightScale !== undefined) {\n this.height_ = heightScale * image.height;\n }\n }\n }\n\n /**\n * @param {function(import(\"../events/Event.js\").default): void} listener Listener function.\n */\n listenImageChange(listener) {\n this.iconImage_.addEventListener(EventType.CHANGE, listener);\n }\n\n /**\n * Load not yet loaded URI.\n * When rendering a feature with an icon style, the vector renderer will\n * automatically call this method. However, you might want to call this\n * method yourself for preloading or other purposes.\n * @api\n */\n load() {\n this.iconImage_.load();\n }\n\n /**\n * @param {function(import(\"../events/Event.js\").default): void} listener Listener function.\n */\n unlistenImageChange(listener) {\n this.iconImage_.removeEventListener(EventType.CHANGE, listener);\n }\n}\n\nexport default Icon;\n","/**\n * @module ol/style/Stroke\n */\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} [color] A color, gradient or pattern.\n * See {@link module:ol/color~Color} and {@link module:ol/colorlike~ColorLike} for possible formats.\n * Default null; if null, the Canvas/renderer default black will be used.\n * @property {CanvasLineCap} [lineCap='round'] Line cap style: `butt`, `round`, or `square`.\n * @property {CanvasLineJoin} [lineJoin='round'] Line join style: `bevel`, `round`, or `miter`.\n * @property {Array} [lineDash] Line dash pattern. Default is `null` (no dash).\n * @property {number} [lineDashOffset=0] Line dash offset.\n * @property {number} [miterLimit=10] Miter limit.\n * @property {number} [width] Width.\n */\n\n/**\n * @classdesc\n * Set stroke style for vector features.\n * Note that the defaults given are the Canvas defaults, which will be used if\n * option is not defined. The `get` functions return whatever was entered in\n * the options; they will not return the default.\n * @api\n */\nclass Stroke {\n /**\n * @param {Options} [options] Options.\n */\n constructor(options) {\n options = options || {};\n\n /**\n * @private\n * @type {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike}\n */\n this.color_ = options.color !== undefined ? options.color : null;\n\n /**\n * @private\n * @type {CanvasLineCap|undefined}\n */\n this.lineCap_ = options.lineCap;\n\n /**\n * @private\n * @type {Array|null}\n */\n this.lineDash_ = options.lineDash !== undefined ? options.lineDash : null;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.lineDashOffset_ = options.lineDashOffset;\n\n /**\n * @private\n * @type {CanvasLineJoin|undefined}\n */\n this.lineJoin_ = options.lineJoin;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.miterLimit_ = options.miterLimit;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.width_ = options.width;\n }\n\n /**\n * Clones the style.\n * @return {Stroke} The cloned style.\n * @api\n */\n clone() {\n const color = this.getColor();\n return new Stroke({\n color: Array.isArray(color) ? color.slice() : color || undefined,\n lineCap: this.getLineCap(),\n lineDash: this.getLineDash() ? this.getLineDash().slice() : undefined,\n lineDashOffset: this.getLineDashOffset(),\n lineJoin: this.getLineJoin(),\n miterLimit: this.getMiterLimit(),\n width: this.getWidth(),\n });\n }\n\n /**\n * Get the stroke color.\n * @return {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} Color.\n * @api\n */\n getColor() {\n return this.color_;\n }\n\n /**\n * Get the line cap type for the stroke.\n * @return {CanvasLineCap|undefined} Line cap.\n * @api\n */\n getLineCap() {\n return this.lineCap_;\n }\n\n /**\n * Get the line dash style for the stroke.\n * @return {Array|null} Line dash.\n * @api\n */\n getLineDash() {\n return this.lineDash_;\n }\n\n /**\n * Get the line dash offset for the stroke.\n * @return {number|undefined} Line dash offset.\n * @api\n */\n getLineDashOffset() {\n return this.lineDashOffset_;\n }\n\n /**\n * Get the line join type for the stroke.\n * @return {CanvasLineJoin|undefined} Line join.\n * @api\n */\n getLineJoin() {\n return this.lineJoin_;\n }\n\n /**\n * Get the miter limit for the stroke.\n * @return {number|undefined} Miter limit.\n * @api\n */\n getMiterLimit() {\n return this.miterLimit_;\n }\n\n /**\n * Get the stroke width.\n * @return {number|undefined} Width.\n * @api\n */\n getWidth() {\n return this.width_;\n }\n\n /**\n * Set the color.\n *\n * @param {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} color Color.\n * @api\n */\n setColor(color) {\n this.color_ = color;\n }\n\n /**\n * Set the line cap.\n *\n * @param {CanvasLineCap|undefined} lineCap Line cap.\n * @api\n */\n setLineCap(lineCap) {\n this.lineCap_ = lineCap;\n }\n\n /**\n * Set the line dash.\n *\n * @param {Array|null} lineDash Line dash.\n * @api\n */\n setLineDash(lineDash) {\n this.lineDash_ = lineDash;\n }\n\n /**\n * Set the line dash offset.\n *\n * @param {number|undefined} lineDashOffset Line dash offset.\n * @api\n */\n setLineDashOffset(lineDashOffset) {\n this.lineDashOffset_ = lineDashOffset;\n }\n\n /**\n * Set the line join.\n *\n * @param {CanvasLineJoin|undefined} lineJoin Line join.\n * @api\n */\n setLineJoin(lineJoin) {\n this.lineJoin_ = lineJoin;\n }\n\n /**\n * Set the miter limit.\n *\n * @param {number|undefined} miterLimit Miter limit.\n * @api\n */\n setMiterLimit(miterLimit) {\n this.miterLimit_ = miterLimit;\n }\n\n /**\n * Set the width.\n *\n * @param {number|undefined} width Width.\n * @api\n */\n setWidth(width) {\n this.width_ = width;\n }\n}\n\nexport default Stroke;\n","/**\n * @module ol/style/Style\n */\n\nimport CircleStyle from './Circle.js';\nimport Fill from './Fill.js';\nimport Stroke from './Stroke.js';\nimport {assert} from '../asserts.js';\n\n/**\n * A function that takes an {@link module:ol/Feature~Feature} and a `{number}`\n * representing the view's resolution. The function should return a\n * {@link module:ol/style/Style~Style} or an array of them. This way e.g. a\n * vector layer can be styled. If the function returns `undefined`, the\n * feature will not be rendered.\n *\n * @typedef {function(import(\"../Feature.js\").FeatureLike, number):(Style|Array