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fn);\n }\n }\n },\n \n /**\n * Remove Event\n *\n * @param {element} element\n * @param {event} event\n * @param {Function} fn\n * @param {boolean} bubbling\n */\n removeEvent = function (el, evt, fn, bubble) {\n if (\"removeEventListener\" in el) {\n try {\n el.removeEventListener(evt, fn, bubble);\n } catch (e) {\n if (typeof fn === \"object\" && fn.handleEvent) {\n el.removeEventListener(evt, function (e) {\n fn.handleEvent.call(fn, e);\n }, bubble);\n } else {\n throw e;\n }\n }\n } else if (\"detachEvent\" in el) {\n if (typeof fn === \"object\" && fn.handleEvent) {\n el.detachEvent(\"on\" + evt, function () {\n fn.handleEvent.call(fn);\n });\n } else {\n el.detachEvent(\"on\" + evt, fn);\n }\n }\n },\n \n /**\n * Get the children of any element\n *\n * @param {element}\n * @return {array} Returns matching elements in an array\n */\n getChildren = function (e) {\n if (e.children.length < 1) {\n throw new Error(\"The Nav container has no containing elements\");\n }\n // Store all children in array\n var children = [];\n // Loop through children and store in array if child != TextNode\n for (var i = 0; i < e.children.length; i++) {\n if (e.children[i].nodeType === 1) {\n children.push(e.children[i]);\n }\n }\n return children;\n },\n \n /**\n * Sets multiple attributes at once\n *\n * @param {element} element\n * @param {attrs} attrs\n */\n setAttributes = function (el, attrs) {\n for (var key in attrs) {\n el.setAttribute(key, attrs[key]);\n }\n },\n \n /**\n * Adds a class to any element\n *\n * @param {element} element\n * @param {string} class\n */\n addClass = function (el, cls) {\n if (el.className.indexOf(cls) !== 0) {\n el.className += \" \" + cls;\n el.className = el.className.replace(/(^\\s*)|(\\s*$)/g,\"\");\n }\n },\n \n /**\n * Remove a class from any element\n *\n * @param {element} element\n * @param {string} class\n */\n removeClass = function (el, cls) {\n var reg = new RegExp(\"(\\\\s|^)\" + cls + \"(\\\\s|$)\");\n el.className = 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toggle\n closeOnNavClick: false, // Boolean: Close the navigation when one of the links are clicked\n openPos: \"relative\", // String: Position of the opened nav, relative or static\n navClass: \"nav-collapse\", // String: Default CSS class. If changed, you need to edit the CSS too!\n navActiveClass: \"js-nav-active\", // String: Class that is added to <html> element when nav is active\n jsClass: \"js\", // String: 'JS enabled' class which is added to <html> element\n init: function(){}, // Function: Init callback\n open: function(){}, // Function: Open callback\n close: function(){} // Function: Close callback\n };\n\n // User defined options\n for (i in options) {\n this.options[i] = options[i];\n }\n\n // Adds \"js\" class for <html>\n addClass(htmlEl, this.options.jsClass);\n\n // Wrapper\n this.wrapperEl = el.replace(\"#\", \"\");\n\n // Try selecting ID first\n if (document.getElementById(this.wrapperEl)) {\n this.wrapper = document.getElementById(this.wrapperEl);\n\n // If element with an ID doesn't exist, use querySelector\n } else if (document.querySelector(this.wrapperEl)) {\n this.wrapper = document.querySelector(this.wrapperEl);\n\n // If element doesn't exists, stop here.\n } else {\n throw new Error(\"The nav element you are trying to select doesn't exist\");\n }\n\n // Inner wrapper\n this.wrapper.inner = getChildren(this.wrapper);\n\n // For minification\n opts = this.options;\n nav = this.wrapper;\n\n // Init\n this._init(this);\n };\n\n ResponsiveNav.prototype = {\n\n /**\n * Unattaches events and removes any classes that were added\n */\n destroy: function () {\n this._removeStyles();\n removeClass(nav, \"closed\");\n removeClass(nav, \"opened\");\n removeClass(nav, opts.navClass);\n removeClass(nav, opts.navClass + \"-\" + this.index);\n removeClass(htmlEl, opts.navActiveClass);\n nav.removeAttribute(\"style\");\n nav.removeAttribute(\"aria-hidden\");\n\n removeEvent(window, \"resize\", this, false);\n removeEvent(window, \"focus\", this, false);\n removeEvent(document.body, \"touchmove\", this, false);\n removeEvent(navToggle, \"touchstart\", this, false);\n removeEvent(navToggle, \"touchend\", this, false);\n removeEvent(navToggle, \"mouseup\", this, false);\n removeEvent(navToggle, \"keyup\", this, false);\n removeEvent(navToggle, \"click\", this, false);\n\n if (!opts.customToggle) {\n navToggle.parentNode.removeChild(navToggle);\n } else {\n navToggle.removeAttribute(\"aria-hidden\");\n }\n },\n\n /**\n * Toggles the navigation open/close\n */\n toggle: function () {\n if (hasAnimFinished === true) {\n if (!navOpen) {\n this.open();\n } else {\n this.close();\n }\n }\n },\n\n /**\n * Opens the navigation\n */\n open: function () {\n if (!navOpen) {\n removeClass(nav, \"closed\");\n addClass(nav, \"opened\");\n addClass(htmlEl, opts.navActiveClass);\n addClass(navToggle, \"active\");\n nav.style.position = opts.openPos;\n setAttributes(nav, {\"aria-hidden\": \"false\"});\n navOpen = true;\n opts.open();\n }\n },\n\n /**\n * Closes the navigation\n */\n close: function () {\n if (navOpen) {\n addClass(nav, \"closed\");\n removeClass(nav, \"opened\");\n removeClass(htmlEl, opts.navActiveClass);\n removeClass(navToggle, \"active\");\n setAttributes(nav, {\"aria-hidden\": \"true\"});\n\n // If animations are enabled, wait until they finish\n if (opts.animate) {\n hasAnimFinished = false;\n setTimeout(function () {\n nav.style.position = \"absolute\";\n hasAnimFinished = true;\n }, opts.transition + 10);\n\n // Animations aren't enabled, we can do these immediately\n } else {\n nav.style.position = \"absolute\";\n }\n\n navOpen = false;\n opts.close();\n }\n },\n\n /**\n * Resize is called on window resize and orientation change.\n * It initializes the CSS styles and height calculations.\n */\n resize: function () {\n\n // Resize watches navigation toggle's display state\n if (window.getComputedStyle(navToggle, null).getPropertyValue(\"display\") !== \"none\") {\n\n isMobile = true;\n setAttributes(navToggle, {\"aria-hidden\": \"false\"});\n\n // If the navigation is hidden\n if (nav.className.match(/(^|\\s)closed(\\s|$)/)) {\n setAttributes(nav, {\"aria-hidden\": \"true\"});\n nav.style.position = \"absolute\";\n }\n\n this._createStyles();\n this._calcHeight();\n } else {\n\n isMobile = false;\n setAttributes(navToggle, {\"aria-hidden\": \"true\"});\n setAttributes(nav, {\"aria-hidden\": \"false\"});\n nav.style.position = opts.openPos;\n this._removeStyles();\n }\n },\n\n /**\n * Takes care of all even handling\n *\n * @param {event} event\n * @return {type} returns the type of event that should be used\n */\n handleEvent: function (e) {\n var evt = e || window.event;\n\n switch (evt.type) {\n case \"touchstart\":\n this._onTouchStart(evt);\n break;\n case \"touchmove\":\n this._onTouchMove(evt);\n break;\n case \"touchend\":\n case \"mouseup\":\n this._onTouchEnd(evt);\n break;\n case \"click\":\n this._preventDefault(evt);\n break;\n case \"keyup\":\n this._onKeyUp(evt);\n break;\n case \"focus\":\n case \"resize\":\n this.resize(evt);\n break;\n }\n },\n\n /**\n * Initializes the widget\n */\n _init: function () {\n this.index = index++;\n\n addClass(nav, opts.navClass);\n addClass(nav, opts.navClass + \"-\" + this.index);\n addClass(nav, \"closed\");\n hasAnimFinished = true;\n navOpen = false;\n\n this._closeOnNavClick();\n this._createToggle();\n this._transitions();\n this.resize();\n\n /**\n * On IE8 the resize event triggers too early for some reason\n * so it's called here again on init to make sure all the\n * calculated styles are correct.\n */\n var self = this;\n setTimeout(function () {\n self.resize();\n }, 20);\n\n addEvent(window, \"resize\", this, false);\n addEvent(window, \"focus\", this, false);\n addEvent(document.body, \"touchmove\", this, false);\n addEvent(navToggle, \"touchstart\", this, false);\n addEvent(navToggle, \"touchend\", this, false);\n addEvent(navToggle, \"mouseup\", this, false);\n addEvent(navToggle, \"keyup\", this, false);\n addEvent(navToggle, \"click\", this, false);\n\n /**\n * Init callback here\n */\n opts.init();\n },\n\n /**\n * Creates Styles to the <head>\n */\n _createStyles: function () {\n if (!styleElement.parentNode) {\n styleElement.type = \"text/css\";\n document.getElementsByTagName(\"head\")[0].appendChild(styleElement);\n }\n },\n\n /**\n * Removes styles from the <head>\n */\n _removeStyles: function () {\n if (styleElement.parentNode) {\n styleElement.parentNode.removeChild(styleElement);\n }\n },\n\n /**\n * Creates Navigation Toggle\n */\n _createToggle: function () {\n\n // If there's no toggle, let's create one\n if (!opts.customToggle) {\n var toggle = document.createElement(\"a\");\n toggle.innerHTML = opts.label;\n setAttributes(toggle, {\n \"href\": \"#\",\n \"class\": \"nav-toggle\"\n });\n\n // Determine where to insert the toggle\n if (opts.insert === \"after\") {\n nav.parentNode.insertBefore(toggle, nav.nextSibling);\n } else {\n nav.parentNode.insertBefore(toggle, nav);\n }\n\n navToggle = toggle;\n\n // There is a toggle already, let's use that one\n } else {\n var toggleEl = opts.customToggle.replace(\"#\", \"\");\n\n if (document.getElementById(toggleEl)) {\n navToggle = document.getElementById(toggleEl);\n } else if (document.querySelector(toggleEl)) {\n navToggle = document.querySelector(toggleEl);\n } else {\n throw new Error(\"The custom nav toggle you are trying to select doesn't exist\");\n }\n }\n },\n\n /**\n * Closes the navigation when a link inside is clicked.\n */\n _closeOnNavClick: function () {\n if (opts.closeOnNavClick) {\n var links = nav.getElementsByTagName(\"a\"),\n self = this;\n forEach(links, function (i, el) {\n addEvent(links[i], \"click\", function () {\n if (isMobile) {\n self.toggle();\n }\n }, false);\n });\n }\n },\n\n /**\n * Prevents the default functionality.\n *\n * @param {event} event\n */\n _preventDefault: function(e) {\n if (e.preventDefault) {\n if (e.stopImmediatePropagation) {\n e.stopImmediatePropagation();\n }\n e.preventDefault();\n e.stopPropagation();\n return false;\n\n // This is strictly for old IE\n } else {\n e.returnValue = false;\n }\n },\n\n /**\n * On touch start we get the location of the touch.\n *\n * @param {event} event\n */\n _onTouchStart: function (e) {\n if (!Event.prototype.stopImmediatePropagation) {\n this._preventDefault(e);\n }\n this.startX = e.touches[0].clientX;\n this.startY = e.touches[0].clientY;\n this.touchHasMoved = false;\n\n /**\n * Remove mouseup event completely here to avoid\n * double triggering the event.\n */\n removeEvent(navToggle, \"mouseup\", this, false);\n },\n\n /**\n * Check if the user is scrolling instead of tapping.\n *\n * @param {event} event\n */\n _onTouchMove: function (e) {\n if (Math.abs(e.touches[0].clientX - this.startX) > 10 ||\n Math.abs(e.touches[0].clientY - this.startY) > 10) {\n this.touchHasMoved = true;\n }\n },\n\n /**\n * On touch end toggle the navigation.\n *\n * @param {event} event\n */\n _onTouchEnd: function (e) {\n this._preventDefault(e);\n if (!isMobile) {\n return;\n }\n\n // If the user isn't scrolling\n if (!this.touchHasMoved) {\n\n // If the event type is touch\n if (e.type === \"touchend\") {\n this.toggle();\n return;\n\n // Event type was click, not touch\n } else {\n var evt = e || window.event;\n\n // If it isn't a right click, do toggling\n if (!(evt.which === 3 || evt.button === 2)) {\n this.toggle();\n }\n }\n }\n },\n\n /**\n * For keyboard accessibility, toggle the navigation on Enter\n * keypress too.\n *\n * @param {event} event\n */\n _onKeyUp: function (e) {\n var evt = e || window.event;\n if (evt.keyCode === 13) {\n this.toggle();\n }\n },\n\n /**\n * Adds the needed CSS transitions if animations are enabled\n */\n _transitions: function () {\n if (opts.animate) {\n var objStyle = nav.style,\n transition = \"max-height \" + opts.transition + \"ms\";\n\n objStyle.WebkitTransition =\n objStyle.MozTransition =\n objStyle.OTransition =\n objStyle.transition = transition;\n }\n },\n\n /**\n * Calculates the height of the navigation and then creates\n * styles which are later added to the page <head>\n */\n _calcHeight: function () {\n var savedHeight = 0;\n for (var i = 0; i < nav.inner.length; i++) {\n savedHeight += nav.inner[i].offsetHeight;\n }\n\n var innerStyles = \".\" + opts.jsClass + \" .\" + opts.navClass + \"-\" + this.index + \".opened{max-height:\" + savedHeight + \"px !important} .\" + opts.jsClass + \" .\" + opts.navClass + \"-\" + this.index + \".opened.dropdown-active {max-height:9999px !important}\";\n\n if (styleElement.styleSheet) {\n styleElement.styleSheet.cssText = innerStyles;\n } else {\n styleElement.innerHTML = innerStyles;\n }\n\n innerStyles = \"\";\n }\n\n };\n\n /**\n * Return new Responsive Nav\n */\n return new ResponsiveNav(el, options);\n\n };\n\n if (typeof module !== \"undefined\" && module.exports) {\n module.exports = responsiveNav;\n } else {\n window.responsiveNav = responsiveNav;\n }\n\n}(document, window, 0));","$(function() {\n // Smallscreen nav\n var nav = responsiveNav('.nav-collapse', {\n customToggle: \"#open-nav\",\n closeOnNavClick: true,\n });\n\n // Skip links\n $('#to-top, #markdown-toc a').click(function() {\n if (location.pathname.replace(/^\\//,'') === this.pathname.replace(/^\\//,'') && location.hostname === this.hostname) {\n var $target = $(this.hash);\n $target = $target.length && $target || $('[name=' + this.hash.slice(1) +']');\n if ($target.length) {\n var targetOffset = $target.offset().top;\n $('html,body').animate({scrollTop: targetOffset}, 300);\n return false;\n }\n }\n });\n});\n"]} |