1465 lines
53 KiB
JavaScript
1465 lines
53 KiB
JavaScript
/* The Editor object manages the content of the editable frame. It
|
|
* catches events, colours nodes, and indents lines. This file also
|
|
* holds some functions for transforming arbitrary DOM structures into
|
|
* plain sequences of <span> and <br> elements
|
|
*/
|
|
|
|
var internetExplorer = document.selection && window.ActiveXObject && /MSIE/.test(navigator.userAgent);
|
|
var webkit = /AppleWebKit/.test(navigator.userAgent);
|
|
var safari = /Apple Computers, Inc/.test(navigator.vendor);
|
|
var gecko = /gecko\/(\d{8})/i.test(navigator.userAgent);
|
|
|
|
// Make sure a string does not contain two consecutive 'collapseable'
|
|
// whitespace characters.
|
|
function makeWhiteSpace(n) {
|
|
var buffer = [], nb = true;
|
|
for (; n > 0; n--) {
|
|
buffer.push((nb || n == 1) ? nbsp : " ");
|
|
nb = !nb;
|
|
}
|
|
return buffer.join("");
|
|
}
|
|
|
|
// Create a set of white-space characters that will not be collapsed
|
|
// by the browser, but will not break text-wrapping either.
|
|
function fixSpaces(string) {
|
|
if (string.charAt(0) == " ") string = nbsp + string.slice(1);
|
|
return string.replace(/\t/g, function(){return makeWhiteSpace(indentUnit);})
|
|
.replace(/[ \u00a0]{2,}/g, function(s) {return makeWhiteSpace(s.length);});
|
|
}
|
|
|
|
function cleanText(text) {
|
|
return text.replace(/\u00a0/g, " ").replace(/\u200b/g, "");
|
|
}
|
|
|
|
// Create a SPAN node with the expected properties for document part
|
|
// spans.
|
|
function makePartSpan(value, doc) {
|
|
var text = value;
|
|
if (value.nodeType == 3) text = value.nodeValue;
|
|
else value = doc.createTextNode(text);
|
|
|
|
var span = doc.createElement("SPAN");
|
|
span.isPart = true;
|
|
span.appendChild(value);
|
|
span.currentText = text;
|
|
return span;
|
|
}
|
|
|
|
// On webkit, when the last BR of the document does not have text
|
|
// behind it, the cursor can not be put on the line after it. This
|
|
// makes pressing enter at the end of the document occasionally do
|
|
// nothing (or at least seem to do nothing). To work around it, this
|
|
// function makes sure the document ends with a span containing a
|
|
// zero-width space character. The traverseDOM iterator filters such
|
|
// character out again, so that the parsers won't see them. This
|
|
// function is called from a few strategic places to make sure the
|
|
// zwsp is restored after the highlighting process eats it.
|
|
var webkitLastLineHack = webkit ?
|
|
function(container) {
|
|
var last = container.lastChild;
|
|
if (!last || !last.isPart || last.textContent != "\u200b")
|
|
container.appendChild(makePartSpan("\u200b", container.ownerDocument));
|
|
} : function() {};
|
|
|
|
var Editor = (function(){
|
|
// The HTML elements whose content should be suffixed by a newline
|
|
// when converting them to flat text.
|
|
var newlineElements = {"P": true, "DIV": true, "LI": true};
|
|
|
|
function asEditorLines(string) {
|
|
var tab = makeWhiteSpace(indentUnit);
|
|
return map(string.replace(/\t/g, tab).replace(/\u00a0/g, " ").replace(/\r\n?/g, "\n").split("\n"), fixSpaces);
|
|
}
|
|
|
|
// Helper function for traverseDOM. Flattens an arbitrary DOM node
|
|
// into an array of textnodes and <br> tags.
|
|
function simplifyDOM(root, atEnd) {
|
|
var doc = root.ownerDocument;
|
|
var result = [];
|
|
var leaving = true;
|
|
|
|
function simplifyNode(node, top) {
|
|
if (node.nodeType == 3) {
|
|
var text = node.nodeValue = fixSpaces(node.nodeValue.replace(/[\r\u200b]/g, "").replace(/\n/g, " "));
|
|
if (text.length) leaving = false;
|
|
result.push(node);
|
|
}
|
|
else if (isBR(node) && node.childNodes.length == 0) {
|
|
leaving = true;
|
|
result.push(node);
|
|
}
|
|
else {
|
|
forEach(node.childNodes, simplifyNode);
|
|
if (!leaving && newlineElements.hasOwnProperty(node.nodeName.toUpperCase())) {
|
|
leaving = true;
|
|
if (!atEnd || !top)
|
|
result.push(doc.createElement("BR"));
|
|
}
|
|
}
|
|
}
|
|
|
|
simplifyNode(root, true);
|
|
return result;
|
|
}
|
|
|
|
// Creates a MochiKit-style iterator that goes over a series of DOM
|
|
// nodes. The values it yields are strings, the textual content of
|
|
// the nodes. It makes sure that all nodes up to and including the
|
|
// one whose text is being yielded have been 'normalized' to be just
|
|
// <span> and <br> elements.
|
|
// See the story.html file for some short remarks about the use of
|
|
// continuation-passing style in this iterator.
|
|
function traverseDOM(start){
|
|
function _yield(value, c){cc = c; return value;}
|
|
function push(fun, arg, c){return function(){return fun(arg, c);};}
|
|
function stop(){cc = stop; throw StopIteration;};
|
|
var cc = push(scanNode, start, stop);
|
|
var owner = start.ownerDocument;
|
|
var nodeQueue = [];
|
|
|
|
// Create a function that can be used to insert nodes after the
|
|
// one given as argument.
|
|
function pointAt(node){
|
|
var parent = node.parentNode;
|
|
var next = node.nextSibling;
|
|
return function(newnode) {
|
|
parent.insertBefore(newnode, next);
|
|
};
|
|
}
|
|
var point = null;
|
|
|
|
// This an Opera-specific hack -- always insert an empty span
|
|
// between two BRs, because Opera's cursor code gets terribly
|
|
// confused when the cursor is between two BRs.
|
|
var afterBR = true;
|
|
|
|
// Insert a normalized node at the current point. If it is a text
|
|
// node, wrap it in a <span>, and give that span a currentText
|
|
// property -- this is used to cache the nodeValue, because
|
|
// directly accessing nodeValue is horribly slow on some browsers.
|
|
// The dirty property is used by the highlighter to determine
|
|
// which parts of the document have to be re-highlighted.
|
|
function insertPart(part){
|
|
var text = "\n";
|
|
if (part.nodeType == 3) {
|
|
select.snapshotChanged();
|
|
part = makePartSpan(part, owner);
|
|
text = part.currentText;
|
|
afterBR = false;
|
|
}
|
|
else {
|
|
if (afterBR && window.opera)
|
|
point(makePartSpan("", owner));
|
|
afterBR = true;
|
|
}
|
|
part.dirty = true;
|
|
nodeQueue.push(part);
|
|
point(part);
|
|
return text;
|
|
}
|
|
|
|
// Extract the text and newlines from a DOM node, insert them into
|
|
// the document, and yield the textual content. Used to replace
|
|
// non-normalized nodes.
|
|
function writeNode(node, c, end) {
|
|
var toYield = [];
|
|
forEach(simplifyDOM(node, end), function(part) {
|
|
toYield.push(insertPart(part));
|
|
});
|
|
return _yield(toYield.join(""), c);
|
|
}
|
|
|
|
// Check whether a node is a normalized <span> element.
|
|
function partNode(node){
|
|
if (node.isPart && node.childNodes.length == 1 && node.firstChild.nodeType == 3) {
|
|
node.currentText = node.firstChild.nodeValue;
|
|
return !/[\n\t\r]/.test(node.currentText);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// Handle a node. Add its successor to the continuation if there
|
|
// is one, find out whether the node is normalized. If it is,
|
|
// yield its content, otherwise, normalize it (writeNode will take
|
|
// care of yielding).
|
|
function scanNode(node, c){
|
|
if (node.nextSibling)
|
|
c = push(scanNode, node.nextSibling, c);
|
|
|
|
if (partNode(node)){
|
|
nodeQueue.push(node);
|
|
afterBR = false;
|
|
return _yield(node.currentText, c);
|
|
}
|
|
else if (isBR(node)) {
|
|
if (afterBR && window.opera)
|
|
node.parentNode.insertBefore(makePartSpan("", owner), node);
|
|
nodeQueue.push(node);
|
|
afterBR = true;
|
|
return _yield("\n", c);
|
|
}
|
|
else {
|
|
var end = !node.nextSibling;
|
|
point = pointAt(node);
|
|
removeElement(node);
|
|
return writeNode(node, c, end);
|
|
}
|
|
}
|
|
|
|
// MochiKit iterators are objects with a next function that
|
|
// returns the next value or throws StopIteration when there are
|
|
// no more values.
|
|
return {next: function(){return cc();}, nodes: nodeQueue};
|
|
}
|
|
|
|
// Determine the text size of a processed node.
|
|
function nodeSize(node) {
|
|
return isBR(node) ? 1 : node.currentText.length;
|
|
}
|
|
|
|
// Search backwards through the top-level nodes until the next BR or
|
|
// the start of the frame.
|
|
function startOfLine(node) {
|
|
while (node && !isBR(node)) node = node.previousSibling;
|
|
return node;
|
|
}
|
|
function endOfLine(node, container) {
|
|
if (!node) node = container.firstChild;
|
|
else if (isBR(node)) node = node.nextSibling;
|
|
|
|
while (node && !isBR(node)) node = node.nextSibling;
|
|
return node;
|
|
}
|
|
|
|
function time() {return new Date().getTime();}
|
|
|
|
// Client interface for searching the content of the editor. Create
|
|
// these by calling CodeMirror.getSearchCursor. To use, call
|
|
// findNext on the resulting object -- this returns a boolean
|
|
// indicating whether anything was found, and can be called again to
|
|
// skip to the next find. Use the select and replace methods to
|
|
// actually do something with the found locations.
|
|
function SearchCursor(editor, string, fromCursor, caseFold) {
|
|
this.editor = editor;
|
|
this.caseFold = caseFold;
|
|
if (caseFold) string = string.toLowerCase();
|
|
this.history = editor.history;
|
|
this.history.commit();
|
|
|
|
// Are we currently at an occurrence of the search string?
|
|
this.atOccurrence = false;
|
|
// The object stores a set of nodes coming after its current
|
|
// position, so that when the current point is taken out of the
|
|
// DOM tree, we can still try to continue.
|
|
this.fallbackSize = 15;
|
|
var cursor;
|
|
// Start from the cursor when specified and a cursor can be found.
|
|
if (fromCursor && (cursor = select.cursorPos(this.editor.container))) {
|
|
this.line = cursor.node;
|
|
this.offset = cursor.offset;
|
|
}
|
|
else {
|
|
this.line = null;
|
|
this.offset = 0;
|
|
}
|
|
this.valid = !!string;
|
|
|
|
// Create a matcher function based on the kind of string we have.
|
|
var target = string.split("\n"), self = this;
|
|
this.matches = (target.length == 1) ?
|
|
// For one-line strings, searching can be done simply by calling
|
|
// indexOf on the current line.
|
|
function() {
|
|
var line = cleanText(self.history.textAfter(self.line).slice(self.offset));
|
|
var match = (self.caseFold ? line.toLowerCase() : line).indexOf(string);
|
|
if (match > -1)
|
|
return {from: {node: self.line, offset: self.offset + match},
|
|
to: {node: self.line, offset: self.offset + match + string.length}};
|
|
} :
|
|
// Multi-line strings require internal iteration over lines, and
|
|
// some clunky checks to make sure the first match ends at the
|
|
// end of the line and the last match starts at the start.
|
|
function() {
|
|
var firstLine = cleanText(self.history.textAfter(self.line).slice(self.offset));
|
|
var match = (self.caseFold ? firstLine.toLowerCase() : firstLine).lastIndexOf(target[0]);
|
|
if (match == -1 || match != firstLine.length - target[0].length)
|
|
return false;
|
|
var startOffset = self.offset + match;
|
|
|
|
var line = self.history.nodeAfter(self.line);
|
|
for (var i = 1; i < target.length - 1; i++) {
|
|
var lineText = cleanText(self.history.textAfter(line));
|
|
if ((self.caseFold ? lineText.toLowerCase() : lineText) != target[i])
|
|
return false;
|
|
line = self.history.nodeAfter(line);
|
|
}
|
|
|
|
var lastLine = cleanText(self.history.textAfter(line));
|
|
if ((self.caseFold ? lastLine.toLowerCase() : lastLine).indexOf(target[target.length - 1]) != 0)
|
|
return false;
|
|
|
|
return {from: {node: self.line, offset: startOffset},
|
|
to: {node: line, offset: target[target.length - 1].length}};
|
|
};
|
|
}
|
|
|
|
SearchCursor.prototype = {
|
|
findNext: function() {
|
|
if (!this.valid) return false;
|
|
this.atOccurrence = false;
|
|
var self = this;
|
|
|
|
// Go back to the start of the document if the current line is
|
|
// no longer in the DOM tree.
|
|
if (this.line && !this.line.parentNode) {
|
|
this.line = null;
|
|
this.offset = 0;
|
|
}
|
|
|
|
// Set the cursor's position one character after the given
|
|
// position.
|
|
function saveAfter(pos) {
|
|
if (self.history.textAfter(pos.node).length > pos.offset) {
|
|
self.line = pos.node;
|
|
self.offset = pos.offset + 1;
|
|
}
|
|
else {
|
|
self.line = self.history.nodeAfter(pos.node);
|
|
self.offset = 0;
|
|
}
|
|
}
|
|
|
|
while (true) {
|
|
var match = this.matches();
|
|
// Found the search string.
|
|
if (match) {
|
|
this.atOccurrence = match;
|
|
saveAfter(match.from);
|
|
return true;
|
|
}
|
|
this.line = this.history.nodeAfter(this.line);
|
|
this.offset = 0;
|
|
// End of document.
|
|
if (!this.line) {
|
|
this.valid = false;
|
|
return false;
|
|
}
|
|
}
|
|
},
|
|
|
|
select: function() {
|
|
if (this.atOccurrence) {
|
|
select.setCursorPos(this.editor.container, this.atOccurrence.from, this.atOccurrence.to);
|
|
select.scrollToCursor(this.editor.container);
|
|
}
|
|
},
|
|
|
|
replace: function(string) {
|
|
if (this.atOccurrence) {
|
|
var end = this.editor.replaceRange(this.atOccurrence.from, this.atOccurrence.to, string);
|
|
this.line = end.node;
|
|
this.offset = end.offset;
|
|
this.atOccurrence = false;
|
|
}
|
|
}
|
|
};
|
|
|
|
// The Editor object is the main inside-the-iframe interface.
|
|
function Editor(options) {
|
|
this.options = options;
|
|
window.indentUnit = options.indentUnit;
|
|
this.parent = parent;
|
|
this.doc = document;
|
|
var container = this.container = this.doc.body;
|
|
this.win = window;
|
|
this.history = new History(container, options.undoDepth, options.undoDelay, this);
|
|
var self = this;
|
|
|
|
if (!Editor.Parser)
|
|
throw "No parser loaded.";
|
|
if (options.parserConfig && Editor.Parser.configure)
|
|
Editor.Parser.configure(options.parserConfig);
|
|
|
|
if (!options.readOnly)
|
|
select.setCursorPos(container, {node: null, offset: 0});
|
|
|
|
this.dirty = [];
|
|
this.importCode(options.content || "");
|
|
this.history.onChange = options.onChange;
|
|
|
|
if (!options.readOnly) {
|
|
if (options.continuousScanning !== false) {
|
|
this.scanner = this.documentScanner(options.passTime);
|
|
this.delayScanning();
|
|
}
|
|
|
|
function setEditable() {
|
|
// In IE, designMode frames can not run any scripts, so we use
|
|
// contentEditable instead.
|
|
if (document.body.contentEditable != undefined && internetExplorer)
|
|
document.body.contentEditable = "true";
|
|
else
|
|
document.designMode = "on";
|
|
|
|
document.documentElement.style.borderWidth = "0";
|
|
if (!options.textWrapping)
|
|
container.style.whiteSpace = "nowrap";
|
|
}
|
|
|
|
// If setting the frame editable fails, try again when the user
|
|
// focus it (happens when the frame is not visible on
|
|
// initialisation, in Firefox).
|
|
try {
|
|
setEditable();
|
|
}
|
|
catch(e) {
|
|
var focusEvent = addEventHandler(document, "focus", function() {
|
|
focusEvent();
|
|
setEditable();
|
|
}, true);
|
|
}
|
|
|
|
addEventHandler(document, "keydown", method(this, "keyDown"));
|
|
addEventHandler(document, "keypress", method(this, "keyPress"));
|
|
addEventHandler(document, "keyup", method(this, "keyUp"));
|
|
|
|
function cursorActivity() {self.cursorActivity(false);}
|
|
addEventHandler(document.body, "mouseup", cursorActivity);
|
|
addEventHandler(document.body, "cut", cursorActivity);
|
|
|
|
// workaround for a gecko bug [?] where going forward and then
|
|
// back again breaks designmode (no more cursor)
|
|
if (gecko)
|
|
addEventHandler(this.win, "pagehide", function(){self.unloaded = true;});
|
|
|
|
addEventHandler(document.body, "paste", function(event) {
|
|
cursorActivity();
|
|
var text = null;
|
|
try {
|
|
var clipboardData = event.clipboardData || window.clipboardData;
|
|
if (clipboardData) text = clipboardData.getData('Text');
|
|
}
|
|
catch(e) {}
|
|
if (text !== null) {
|
|
event.stop();
|
|
self.replaceSelection(text);
|
|
select.scrollToCursor(self.container);
|
|
}
|
|
});
|
|
|
|
if (this.options.autoMatchParens)
|
|
addEventHandler(document.body, "click", method(this, "scheduleParenHighlight"));
|
|
}
|
|
else if (!options.textWrapping) {
|
|
container.style.whiteSpace = "nowrap";
|
|
}
|
|
}
|
|
|
|
function isSafeKey(code) {
|
|
return (code >= 16 && code <= 18) || // shift, control, alt
|
|
(code >= 33 && code <= 40); // arrows, home, end
|
|
}
|
|
|
|
Editor.prototype = {
|
|
// Import a piece of code into the editor.
|
|
importCode: function(code) {
|
|
this.history.push(null, null, asEditorLines(code));
|
|
this.history.reset();
|
|
},
|
|
|
|
// Extract the code from the editor.
|
|
getCode: function() {
|
|
if (!this.container.firstChild)
|
|
return "";
|
|
|
|
var accum = [];
|
|
select.markSelection(this.win);
|
|
forEach(traverseDOM(this.container.firstChild), method(accum, "push"));
|
|
webkitLastLineHack(this.container);
|
|
select.selectMarked();
|
|
return cleanText(accum.join(""));
|
|
},
|
|
|
|
checkLine: function(node) {
|
|
if (node === false || !(node == null || node.parentNode == this.container))
|
|
throw parent.CodeMirror.InvalidLineHandle;
|
|
},
|
|
|
|
cursorPosition: function(start) {
|
|
if (start == null) start = true;
|
|
var pos = select.cursorPos(this.container, start);
|
|
if (pos) return {line: pos.node, character: pos.offset};
|
|
else return {line: null, character: 0};
|
|
},
|
|
|
|
firstLine: function() {
|
|
return null;
|
|
},
|
|
|
|
lastLine: function() {
|
|
if (this.container.lastChild) return startOfLine(this.container.lastChild);
|
|
else return null;
|
|
},
|
|
|
|
nextLine: function(line) {
|
|
this.checkLine(line);
|
|
var end = endOfLine(line, this.container);
|
|
return end || false;
|
|
},
|
|
|
|
prevLine: function(line) {
|
|
this.checkLine(line);
|
|
if (line == null) return false;
|
|
return startOfLine(line.previousSibling);
|
|
},
|
|
|
|
visibleLineCount: function() {
|
|
var line = this.container.firstChild;
|
|
while (line && isBR(line)) line = line.nextSibling; // BR heights are unreliable
|
|
if (!line) return false;
|
|
var innerHeight = (window.innerHeight
|
|
|| document.documentElement.clientHeight
|
|
|| document.body.clientHeight);
|
|
return Math.floor(innerHeight / line.offsetHeight);
|
|
},
|
|
|
|
selectLines: function(startLine, startOffset, endLine, endOffset) {
|
|
this.checkLine(startLine);
|
|
var start = {node: startLine, offset: startOffset}, end = null;
|
|
if (endOffset !== undefined) {
|
|
this.checkLine(endLine);
|
|
end = {node: endLine, offset: endOffset};
|
|
}
|
|
select.setCursorPos(this.container, start, end);
|
|
select.scrollToCursor(this.container);
|
|
},
|
|
|
|
lineContent: function(line) {
|
|
var accum = [];
|
|
for (line = line ? line.nextSibling : this.container.firstChild;
|
|
line && !isBR(line); line = line.nextSibling)
|
|
accum.push(nodeText(line));
|
|
return cleanText(accum.join(""));
|
|
},
|
|
|
|
setLineContent: function(line, content) {
|
|
this.history.commit();
|
|
this.replaceRange({node: line, offset: 0},
|
|
{node: line, offset: this.history.textAfter(line).length},
|
|
content);
|
|
this.addDirtyNode(line);
|
|
this.scheduleHighlight();
|
|
},
|
|
|
|
removeLine: function(line) {
|
|
var node = line ? line.nextSibling : this.container.firstChild;
|
|
while (node) {
|
|
var next = node.nextSibling;
|
|
removeElement(node);
|
|
if (isBR(node)) break;
|
|
node = next;
|
|
}
|
|
this.addDirtyNode(line);
|
|
this.scheduleHighlight();
|
|
},
|
|
|
|
insertIntoLine: function(line, position, content) {
|
|
var before = null;
|
|
if (position == "end") {
|
|
before = endOfLine(line, this.container);
|
|
}
|
|
else {
|
|
for (var cur = line ? line.nextSibling : this.container.firstChild; cur; cur = cur.nextSibling) {
|
|
if (position == 0) {
|
|
before = cur;
|
|
break;
|
|
}
|
|
var text = nodeText(cur);
|
|
if (text.length > position) {
|
|
before = cur.nextSibling;
|
|
content = text.slice(0, position) + content + text.slice(position);
|
|
removeElement(cur);
|
|
break;
|
|
}
|
|
position -= text.length;
|
|
}
|
|
}
|
|
|
|
var lines = asEditorLines(content), doc = this.container.ownerDocument;
|
|
for (var i = 0; i < lines.length; i++) {
|
|
if (i > 0) this.container.insertBefore(doc.createElement("BR"), before);
|
|
this.container.insertBefore(makePartSpan(lines[i], doc), before);
|
|
}
|
|
this.addDirtyNode(line);
|
|
this.scheduleHighlight();
|
|
},
|
|
|
|
// Retrieve the selected text.
|
|
selectedText: function() {
|
|
var h = this.history;
|
|
h.commit();
|
|
|
|
var start = select.cursorPos(this.container, true),
|
|
end = select.cursorPos(this.container, false);
|
|
if (!start || !end) return "";
|
|
|
|
if (start.node == end.node)
|
|
return h.textAfter(start.node).slice(start.offset, end.offset);
|
|
|
|
var text = [h.textAfter(start.node).slice(start.offset)];
|
|
for (var pos = h.nodeAfter(start.node); pos != end.node; pos = h.nodeAfter(pos))
|
|
text.push(h.textAfter(pos));
|
|
text.push(h.textAfter(end.node).slice(0, end.offset));
|
|
return cleanText(text.join("\n"));
|
|
},
|
|
|
|
// Replace the selection with another piece of text.
|
|
replaceSelection: function(text) {
|
|
this.history.commit();
|
|
|
|
var start = select.cursorPos(this.container, true),
|
|
end = select.cursorPos(this.container, false);
|
|
if (!start || !end) return;
|
|
|
|
end = this.replaceRange(start, end, text);
|
|
select.setCursorPos(this.container, end);
|
|
webkitLastLineHack(this.container);
|
|
},
|
|
|
|
reroutePasteEvent: function() {
|
|
if (this.capturingPaste || window.opera) return;
|
|
this.capturingPaste = true;
|
|
var te = window.frameElement.CodeMirror.textareaHack;
|
|
parent.focus();
|
|
te.value = "";
|
|
te.focus();
|
|
|
|
var self = this;
|
|
this.parent.setTimeout(function() {
|
|
self.capturingPaste = false;
|
|
self.win.focus();
|
|
if (self.selectionSnapshot) // IE hack
|
|
self.win.select.setBookmark(self.container, self.selectionSnapshot);
|
|
var text = te.value;
|
|
if (text) {
|
|
self.replaceSelection(text);
|
|
select.scrollToCursor(self.container);
|
|
}
|
|
}, 10);
|
|
},
|
|
|
|
replaceRange: function(from, to, text) {
|
|
var lines = asEditorLines(text);
|
|
lines[0] = this.history.textAfter(from.node).slice(0, from.offset) + lines[0];
|
|
var lastLine = lines[lines.length - 1];
|
|
lines[lines.length - 1] = lastLine + this.history.textAfter(to.node).slice(to.offset);
|
|
var end = this.history.nodeAfter(to.node);
|
|
this.history.push(from.node, end, lines);
|
|
return {node: this.history.nodeBefore(end),
|
|
offset: lastLine.length};
|
|
},
|
|
|
|
getSearchCursor: function(string, fromCursor, caseFold) {
|
|
return new SearchCursor(this, string, fromCursor, caseFold);
|
|
},
|
|
|
|
// Re-indent the whole buffer
|
|
reindent: function() {
|
|
if (this.container.firstChild)
|
|
this.indentRegion(null, this.container.lastChild);
|
|
},
|
|
|
|
reindentSelection: function(direction) {
|
|
if (!select.somethingSelected(this.win)) {
|
|
this.indentAtCursor(direction);
|
|
}
|
|
else {
|
|
var start = select.selectionTopNode(this.container, true),
|
|
end = select.selectionTopNode(this.container, false);
|
|
if (start === false || end === false) return;
|
|
this.indentRegion(start, end, direction);
|
|
}
|
|
},
|
|
|
|
grabKeys: function(eventHandler, filter) {
|
|
this.frozen = eventHandler;
|
|
this.keyFilter = filter;
|
|
},
|
|
ungrabKeys: function() {
|
|
this.frozen = "leave";
|
|
this.keyFilter = null;
|
|
},
|
|
|
|
setParser: function(name) {
|
|
Editor.Parser = window[name];
|
|
if (this.container.firstChild) {
|
|
forEach(this.container.childNodes, function(n) {
|
|
if (n.nodeType != 3) n.dirty = true;
|
|
});
|
|
this.addDirtyNode(this.firstChild);
|
|
this.scheduleHighlight();
|
|
}
|
|
},
|
|
|
|
// Intercept enter and tab, and assign their new functions.
|
|
keyDown: function(event) {
|
|
if (this.frozen == "leave") this.frozen = null;
|
|
if (this.frozen && (!this.keyFilter || this.keyFilter(event.keyCode, event))) {
|
|
event.stop();
|
|
this.frozen(event);
|
|
return;
|
|
}
|
|
|
|
var code = event.keyCode;
|
|
// Don't scan when the user is typing.
|
|
this.delayScanning();
|
|
// Schedule a paren-highlight event, if configured.
|
|
if (this.options.autoMatchParens)
|
|
this.scheduleParenHighlight();
|
|
|
|
// The various checks for !altKey are there because AltGr sets both
|
|
// ctrlKey and altKey to true, and should not be recognised as
|
|
// Control.
|
|
if (code == 13) { // enter
|
|
if (event.ctrlKey && !event.altKey) {
|
|
this.reparseBuffer();
|
|
}
|
|
else {
|
|
select.insertNewlineAtCursor(this.win);
|
|
this.indentAtCursor();
|
|
select.scrollToCursor(this.container);
|
|
}
|
|
event.stop();
|
|
}
|
|
else if (code == 9 && this.options.tabMode != "default" && !event.ctrlKey) { // tab
|
|
this.handleTab(!event.shiftKey);
|
|
event.stop();
|
|
}
|
|
else if (code == 32 && event.shiftKey && this.options.tabMode == "default") { // space
|
|
this.handleTab(true);
|
|
event.stop();
|
|
}
|
|
else if (code == 36 && !event.shiftKey && !event.ctrlKey) { // home
|
|
if (this.home()) event.stop();
|
|
}
|
|
else if (code == 35 && !event.shiftKey && !event.ctrlKey) { // end
|
|
if (this.end()) event.stop();
|
|
}
|
|
// Only in Firefox is the default behavior for PgUp/PgDn correct.
|
|
else if (code == 33 && !event.shiftKey && !event.ctrlKey && !gecko) { // PgUp
|
|
if (this.pageUp()) event.stop();
|
|
}
|
|
else if (code == 34 && !event.shiftKey && !event.ctrlKey && !gecko) { // PgDn
|
|
if (this.pageDown()) event.stop();
|
|
}
|
|
else if ((code == 219 || code == 221) && event.ctrlKey && !event.altKey) { // [, ]
|
|
this.highlightParens(event.shiftKey, true);
|
|
event.stop();
|
|
}
|
|
else if (event.metaKey && !event.shiftKey && (code == 37 || code == 39)) { // Meta-left/right
|
|
var cursor = select.selectionTopNode(this.container);
|
|
if (cursor === false || !this.container.firstChild) return;
|
|
|
|
if (code == 37) select.focusAfterNode(startOfLine(cursor), this.container);
|
|
else {
|
|
var end = endOfLine(cursor, this.container);
|
|
select.focusAfterNode(end ? end.previousSibling : this.container.lastChild, this.container);
|
|
}
|
|
event.stop();
|
|
}
|
|
else if ((event.ctrlKey || event.metaKey) && !event.altKey) {
|
|
if ((event.shiftKey && code == 90) || code == 89) { // shift-Z, Y
|
|
select.scrollToNode(this.history.redo());
|
|
event.stop();
|
|
}
|
|
else if (code == 90 || (safari && code == 8)) { // Z, backspace
|
|
select.scrollToNode(this.history.undo());
|
|
event.stop();
|
|
}
|
|
else if (code == 83 && this.options.saveFunction) { // S
|
|
this.options.saveFunction();
|
|
event.stop();
|
|
}
|
|
else if (internetExplorer && code == 86) {
|
|
this.reroutePasteEvent();
|
|
}
|
|
}
|
|
},
|
|
|
|
// Check for characters that should re-indent the current line,
|
|
// and prevent Opera from handling enter and tab anyway.
|
|
keyPress: function(event) {
|
|
var electric = Editor.Parser.electricChars, self = this;
|
|
// Hack for Opera, and Firefox on OS X, in which stopping a
|
|
// keydown event does not prevent the associated keypress event
|
|
// from happening, so we have to cancel enter and tab again
|
|
// here.
|
|
if ((this.frozen && (!this.keyFilter || this.keyFilter(event.keyCode, event))) ||
|
|
event.code == 13 || (event.code == 9 && this.options.tabMode != "default") ||
|
|
(event.keyCode == 32 && event.shiftKey && this.options.tabMode == "default"))
|
|
event.stop();
|
|
else if (electric && electric.indexOf(event.character) != -1)
|
|
this.parent.setTimeout(function(){self.indentAtCursor(null);}, 0);
|
|
else if ((event.character == "v" || event.character == "V")
|
|
&& (event.ctrlKey || event.metaKey) && !event.altKey) // ctrl-V
|
|
this.reroutePasteEvent();
|
|
},
|
|
|
|
// Mark the node at the cursor dirty when a non-safe key is
|
|
// released.
|
|
keyUp: function(event) {
|
|
this.cursorActivity(isSafeKey(event.keyCode));
|
|
},
|
|
|
|
// Indent the line following a given <br>, or null for the first
|
|
// line. If given a <br> element, this must have been highlighted
|
|
// so that it has an indentation method. Returns the whitespace
|
|
// element that has been modified or created (if any).
|
|
indentLineAfter: function(start, direction) {
|
|
// whiteSpace is the whitespace span at the start of the line,
|
|
// or null if there is no such node.
|
|
var whiteSpace = start ? start.nextSibling : this.container.firstChild;
|
|
if (whiteSpace && !hasClass(whiteSpace, "whitespace"))
|
|
whiteSpace = null;
|
|
|
|
// Sometimes the start of the line can influence the correct
|
|
// indentation, so we retrieve it.
|
|
var firstText = whiteSpace ? whiteSpace.nextSibling : (start ? start.nextSibling : this.container.firstChild);
|
|
var nextChars = (start && firstText && firstText.currentText) ? firstText.currentText : "";
|
|
|
|
// Ask the lexical context for the correct indentation, and
|
|
// compute how much this differs from the current indentation.
|
|
var newIndent = 0, curIndent = whiteSpace ? whiteSpace.currentText.length : 0;
|
|
if (direction != null && this.options.tabMode == "shift")
|
|
newIndent = direction ? curIndent + indentUnit : Math.max(0, curIndent - indentUnit)
|
|
else if (start)
|
|
newIndent = start.indentation(nextChars, curIndent, direction);
|
|
else if (Editor.Parser.firstIndentation)
|
|
newIndent = Editor.Parser.firstIndentation(nextChars, curIndent, direction);
|
|
var indentDiff = newIndent - curIndent;
|
|
|
|
// If there is too much, this is just a matter of shrinking a span.
|
|
if (indentDiff < 0) {
|
|
if (newIndent == 0) {
|
|
if (firstText) select.snapshotMove(whiteSpace.firstChild, firstText.firstChild, 0);
|
|
removeElement(whiteSpace);
|
|
whiteSpace = null;
|
|
}
|
|
else {
|
|
select.snapshotMove(whiteSpace.firstChild, whiteSpace.firstChild, indentDiff, true);
|
|
whiteSpace.currentText = makeWhiteSpace(newIndent);
|
|
whiteSpace.firstChild.nodeValue = whiteSpace.currentText;
|
|
}
|
|
}
|
|
// Not enough...
|
|
else if (indentDiff > 0) {
|
|
// If there is whitespace, we grow it.
|
|
if (whiteSpace) {
|
|
whiteSpace.currentText = makeWhiteSpace(newIndent);
|
|
whiteSpace.firstChild.nodeValue = whiteSpace.currentText;
|
|
}
|
|
// Otherwise, we have to add a new whitespace node.
|
|
else {
|
|
whiteSpace = makePartSpan(makeWhiteSpace(newIndent), this.doc);
|
|
whiteSpace.className = "whitespace";
|
|
if (start) insertAfter(whiteSpace, start);
|
|
else this.container.insertBefore(whiteSpace, this.container.firstChild);
|
|
}
|
|
var fromNode = firstText && (firstText.firstChild || firstText);
|
|
select.snapshotMove(fromNode, whiteSpace.firstChild, newIndent, false, true);
|
|
}
|
|
if (indentDiff != 0) this.addDirtyNode(start);
|
|
},
|
|
|
|
// Re-highlight the selected part of the document.
|
|
highlightAtCursor: function() {
|
|
var pos = select.selectionTopNode(this.container, true);
|
|
var to = select.selectionTopNode(this.container, false);
|
|
if (pos === false || to === false) return false;
|
|
|
|
select.markSelection(this.win);
|
|
if (this.highlight(pos, endOfLine(to, this.container), true, 20) === false)
|
|
return false;
|
|
select.selectMarked();
|
|
return true;
|
|
},
|
|
|
|
// When tab is pressed with text selected, the whole selection is
|
|
// re-indented, when nothing is selected, the line with the cursor
|
|
// is re-indented.
|
|
handleTab: function(direction) {
|
|
if (this.options.tabMode == "spaces")
|
|
select.insertTabAtCursor(this.win);
|
|
else
|
|
this.reindentSelection(direction);
|
|
},
|
|
|
|
// Custom home behaviour that doesn't land the cursor in front of
|
|
// leading whitespace unless pressed twice.
|
|
home: function() {
|
|
var cur = select.selectionTopNode(this.container, true), start = cur;
|
|
if (cur === false || !(!cur || cur.isPart || isBR(cur)) || !this.container.firstChild)
|
|
return false;
|
|
|
|
while (cur && !isBR(cur)) cur = cur.previousSibling;
|
|
var next = cur ? cur.nextSibling : this.container.firstChild;
|
|
if (next && next != start && next.isPart && hasClass(next, "whitespace"))
|
|
select.focusAfterNode(next, this.container);
|
|
else
|
|
select.focusAfterNode(cur, this.container);
|
|
|
|
select.scrollToCursor(this.container);
|
|
return true;
|
|
},
|
|
|
|
// Some browsers (Opera) don't manage to handle the end key
|
|
// properly in the face of vertical scrolling.
|
|
end: function() {
|
|
var cur = select.selectionTopNode(this.container, true);
|
|
if (cur === false) return false;
|
|
cur = endOfLine(cur, this.container);
|
|
if (!cur) return false;
|
|
select.focusAfterNode(cur.previousSibling, this.container);
|
|
select.scrollToCursor(this.container);
|
|
return true;
|
|
},
|
|
|
|
pageUp: function() {
|
|
var line = this.cursorPosition().line, scrollAmount = this.visibleLineCount();
|
|
if (line === false || scrollAmount === false) return false;
|
|
// Try to keep one line on the screen.
|
|
scrollAmount -= 2;
|
|
for (var i = 0; i < scrollAmount; i++) {
|
|
line = this.prevLine(line);
|
|
if (line === false) break;
|
|
}
|
|
if (i == 0) return false; // Already at first line
|
|
select.setCursorPos(this.container, {node: line, offset: 0});
|
|
select.scrollToCursor(this.container);
|
|
return true;
|
|
},
|
|
|
|
pageDown: function() {
|
|
var line = this.cursorPosition().line, scrollAmount = this.visibleLineCount();
|
|
if (line === false || scrollAmount === false) return false;
|
|
// Try to move to the last line of the current page.
|
|
scrollAmount -= 2;
|
|
for (var i = 0; i < scrollAmount; i++) {
|
|
var nextLine = this.nextLine(line);
|
|
if (nextLine === false) break;
|
|
line = nextLine;
|
|
}
|
|
if (i == 0) return false; // Already at last line
|
|
select.setCursorPos(this.container, {node: line, offset: 0});
|
|
select.scrollToCursor(this.container);
|
|
return true;
|
|
},
|
|
|
|
// Delay (or initiate) the next paren highlight event.
|
|
scheduleParenHighlight: function() {
|
|
if (this.parenEvent) this.parent.clearTimeout(this.parenEvent);
|
|
var self = this;
|
|
this.parenEvent = this.parent.setTimeout(function(){self.highlightParens();}, 300);
|
|
},
|
|
|
|
// Take the token before the cursor. If it contains a character in
|
|
// '()[]{}', search for the matching paren/brace/bracket, and
|
|
// highlight them in green for a moment, or red if no proper match
|
|
// was found.
|
|
highlightParens: function(jump, fromKey) {
|
|
var self = this;
|
|
// give the relevant nodes a colour.
|
|
function highlight(node, ok) {
|
|
if (!node) return;
|
|
if (self.options.markParen) {
|
|
self.options.markParen(node, ok);
|
|
}
|
|
else {
|
|
node.style.fontWeight = "bold";
|
|
node.style.color = ok ? "#8F8" : "#F88";
|
|
}
|
|
}
|
|
function unhighlight(node) {
|
|
if (!node) return;
|
|
if (self.options.unmarkParen) {
|
|
self.options.unmarkParen(node);
|
|
}
|
|
else {
|
|
node.style.fontWeight = "";
|
|
node.style.color = "";
|
|
}
|
|
}
|
|
if (!fromKey && self.highlighted) {
|
|
unhighlight(self.highlighted[0]);
|
|
unhighlight(self.highlighted[1]);
|
|
}
|
|
|
|
if (!window.select) return;
|
|
// Clear the event property.
|
|
if (this.parenEvent) this.parent.clearTimeout(this.parenEvent);
|
|
this.parenEvent = null;
|
|
|
|
// Extract a 'paren' from a piece of text.
|
|
function paren(node) {
|
|
if (node.currentText) {
|
|
var match = node.currentText.match(/^[\s\u00a0]*([\(\)\[\]{}])[\s\u00a0]*$/);
|
|
return match && match[1];
|
|
}
|
|
}
|
|
// Determine the direction a paren is facing.
|
|
function forward(ch) {
|
|
return /[\(\[\{]/.test(ch);
|
|
}
|
|
|
|
var ch, cursor = select.selectionTopNode(this.container, true);
|
|
if (!cursor || !this.highlightAtCursor()) return;
|
|
cursor = select.selectionTopNode(this.container, true);
|
|
if (!(cursor && ((ch = paren(cursor)) || (cursor = cursor.nextSibling) && (ch = paren(cursor)))))
|
|
return;
|
|
// We only look for tokens with the same className.
|
|
var className = cursor.className, dir = forward(ch), match = matching[ch];
|
|
|
|
// Since parts of the document might not have been properly
|
|
// highlighted, and it is hard to know in advance which part we
|
|
// have to scan, we just try, and when we find dirty nodes we
|
|
// abort, parse them, and re-try.
|
|
function tryFindMatch() {
|
|
var stack = [], ch, ok = true;
|
|
for (var runner = cursor; runner; runner = dir ? runner.nextSibling : runner.previousSibling) {
|
|
if (runner.className == className && isSpan(runner) && (ch = paren(runner))) {
|
|
if (forward(ch) == dir)
|
|
stack.push(ch);
|
|
else if (!stack.length)
|
|
ok = false;
|
|
else if (stack.pop() != matching[ch])
|
|
ok = false;
|
|
if (!stack.length) break;
|
|
}
|
|
else if (runner.dirty || !isSpan(runner) && !isBR(runner)) {
|
|
return {node: runner, status: "dirty"};
|
|
}
|
|
}
|
|
return {node: runner, status: runner && ok};
|
|
}
|
|
|
|
while (true) {
|
|
var found = tryFindMatch();
|
|
if (found.status == "dirty") {
|
|
this.highlight(found.node, endOfLine(found.node));
|
|
// Needed because in some corner cases a highlight does not
|
|
// reach a node.
|
|
found.node.dirty = false;
|
|
continue;
|
|
}
|
|
else {
|
|
highlight(cursor, found.status);
|
|
highlight(found.node, found.status);
|
|
if (fromKey)
|
|
self.parent.setTimeout(function() {unhighlight(cursor); unhighlight(found.node);}, 500);
|
|
else
|
|
self.highlighted = [cursor, found.node];
|
|
if (jump && found.node)
|
|
select.focusAfterNode(found.node.previousSibling, this.container);
|
|
break;
|
|
}
|
|
}
|
|
},
|
|
|
|
// Adjust the amount of whitespace at the start of the line that
|
|
// the cursor is on so that it is indented properly.
|
|
indentAtCursor: function(direction) {
|
|
if (!this.container.firstChild) return;
|
|
// The line has to have up-to-date lexical information, so we
|
|
// highlight it first.
|
|
if (!this.highlightAtCursor()) return;
|
|
var cursor = select.selectionTopNode(this.container, false);
|
|
// If we couldn't determine the place of the cursor,
|
|
// there's nothing to indent.
|
|
if (cursor === false)
|
|
return;
|
|
select.markSelection(this.win);
|
|
this.indentLineAfter(startOfLine(cursor), direction);
|
|
select.selectMarked();
|
|
},
|
|
|
|
// Indent all lines whose start falls inside of the current
|
|
// selection.
|
|
indentRegion: function(start, end, direction) {
|
|
var current = (start = startOfLine(start)), before = start && startOfLine(start.previousSibling);
|
|
if (!isBR(end)) end = endOfLine(end, this.container);
|
|
this.addDirtyNode(start);
|
|
|
|
do {
|
|
var next = endOfLine(current, this.container);
|
|
if (current) this.highlight(before, next, true);
|
|
this.indentLineAfter(current, direction);
|
|
before = current;
|
|
current = next;
|
|
} while (current != end);
|
|
select.setCursorPos(this.container, {node: start, offset: 0}, {node: end, offset: 0});
|
|
},
|
|
|
|
// Find the node that the cursor is in, mark it as dirty, and make
|
|
// sure a highlight pass is scheduled.
|
|
cursorActivity: function(safe) {
|
|
// pagehide event hack above
|
|
if (this.unloaded) {
|
|
this.win.document.designMode = "off";
|
|
this.win.document.designMode = "on";
|
|
this.unloaded = false;
|
|
}
|
|
|
|
if (internetExplorer) {
|
|
this.container.createTextRange().execCommand("unlink");
|
|
this.selectionSnapshot = select.getBookmark(this.container);
|
|
}
|
|
|
|
var activity = this.options.cursorActivity;
|
|
if (!safe || activity) {
|
|
var cursor = select.selectionTopNode(this.container, false);
|
|
if (cursor === false || !this.container.firstChild) return;
|
|
cursor = cursor || this.container.firstChild;
|
|
if (activity) activity(cursor);
|
|
if (!safe) {
|
|
this.scheduleHighlight();
|
|
this.addDirtyNode(cursor);
|
|
}
|
|
}
|
|
},
|
|
|
|
reparseBuffer: function() {
|
|
forEach(this.container.childNodes, function(node) {node.dirty = true;});
|
|
if (this.container.firstChild)
|
|
this.addDirtyNode(this.container.firstChild);
|
|
},
|
|
|
|
// Add a node to the set of dirty nodes, if it isn't already in
|
|
// there.
|
|
addDirtyNode: function(node) {
|
|
node = node || this.container.firstChild;
|
|
if (!node) return;
|
|
|
|
for (var i = 0; i < this.dirty.length; i++)
|
|
if (this.dirty[i] == node) return;
|
|
|
|
if (node.nodeType != 3)
|
|
node.dirty = true;
|
|
this.dirty.push(node);
|
|
},
|
|
|
|
allClean: function() {
|
|
return !this.dirty.length;
|
|
},
|
|
|
|
// Cause a highlight pass to happen in options.passDelay
|
|
// milliseconds. Clear the existing timeout, if one exists. This
|
|
// way, the passes do not happen while the user is typing, and
|
|
// should as unobtrusive as possible.
|
|
scheduleHighlight: function() {
|
|
// Timeouts are routed through the parent window, because on
|
|
// some browsers designMode windows do not fire timeouts.
|
|
var self = this;
|
|
this.parent.clearTimeout(this.highlightTimeout);
|
|
this.highlightTimeout = this.parent.setTimeout(function(){self.highlightDirty();}, this.options.passDelay);
|
|
},
|
|
|
|
// Fetch one dirty node, and remove it from the dirty set.
|
|
getDirtyNode: function() {
|
|
while (this.dirty.length > 0) {
|
|
var found = this.dirty.pop();
|
|
// IE8 sometimes throws an unexplainable 'invalid argument'
|
|
// exception for found.parentNode
|
|
try {
|
|
// If the node has been coloured in the meantime, or is no
|
|
// longer in the document, it should not be returned.
|
|
while (found && found.parentNode != this.container)
|
|
found = found.parentNode;
|
|
if (found && (found.dirty || found.nodeType == 3))
|
|
return found;
|
|
} catch (e) {}
|
|
}
|
|
return null;
|
|
},
|
|
|
|
// Pick dirty nodes, and highlight them, until options.passTime
|
|
// milliseconds have gone by. The highlight method will continue
|
|
// to next lines as long as it finds dirty nodes. It returns
|
|
// information about the place where it stopped. If there are
|
|
// dirty nodes left after this function has spent all its lines,
|
|
// it shedules another highlight to finish the job.
|
|
highlightDirty: function(force) {
|
|
// Prevent FF from raising an error when it is firing timeouts
|
|
// on a page that's no longer loaded.
|
|
if (!window.select) return false;
|
|
|
|
if (!this.options.readOnly) select.markSelection(this.win);
|
|
var start, endTime = force ? null : time() + this.options.passTime;
|
|
while ((time() < endTime || force) && (start = this.getDirtyNode())) {
|
|
var result = this.highlight(start, endTime);
|
|
if (result && result.node && result.dirty)
|
|
this.addDirtyNode(result.node);
|
|
}
|
|
if (!this.options.readOnly) select.selectMarked();
|
|
if (start) this.scheduleHighlight();
|
|
return this.dirty.length == 0;
|
|
},
|
|
|
|
// Creates a function that, when called through a timeout, will
|
|
// continuously re-parse the document.
|
|
documentScanner: function(passTime) {
|
|
var self = this, pos = null;
|
|
return function() {
|
|
// FF timeout weirdness workaround.
|
|
if (!window.select) return;
|
|
// If the current node is no longer in the document... oh
|
|
// well, we start over.
|
|
if (pos && pos.parentNode != self.container)
|
|
pos = null;
|
|
select.markSelection(self.win);
|
|
var result = self.highlight(pos, time() + passTime, true);
|
|
select.selectMarked();
|
|
var newPos = result ? (result.node && result.node.nextSibling) : null;
|
|
pos = (pos == newPos) ? null : newPos;
|
|
self.delayScanning();
|
|
};
|
|
},
|
|
|
|
// Starts the continuous scanning process for this document after
|
|
// a given interval.
|
|
delayScanning: function() {
|
|
if (this.scanner) {
|
|
this.parent.clearTimeout(this.documentScan);
|
|
this.documentScan = this.parent.setTimeout(this.scanner, this.options.continuousScanning);
|
|
}
|
|
},
|
|
|
|
// The function that does the actual highlighting/colouring (with
|
|
// help from the parser and the DOM normalizer). Its interface is
|
|
// rather overcomplicated, because it is used in different
|
|
// situations: ensuring that a certain line is highlighted, or
|
|
// highlighting up to X milliseconds starting from a certain
|
|
// point. The 'from' argument gives the node at which it should
|
|
// start. If this is null, it will start at the beginning of the
|
|
// document. When a timestamp is given with the 'target' argument,
|
|
// it will stop highlighting at that time. If this argument holds
|
|
// a DOM node, it will highlight until it reaches that node. If at
|
|
// any time it comes across two 'clean' lines (no dirty nodes), it
|
|
// will stop, except when 'cleanLines' is true. maxBacktrack is
|
|
// the maximum number of lines to backtrack to find an existing
|
|
// parser instance. This is used to give up in situations where a
|
|
// highlight would take too long and freeze the browser interface.
|
|
highlight: function(from, target, cleanLines, maxBacktrack){
|
|
var container = this.container, self = this, active = this.options.activeTokens;
|
|
var endTime = (typeof target == "number" ? target : null);
|
|
|
|
if (!container.firstChild)
|
|
return false;
|
|
// Backtrack to the first node before from that has a partial
|
|
// parse stored.
|
|
while (from && (!from.parserFromHere || from.dirty)) {
|
|
if (maxBacktrack != null && isBR(from) && (--maxBacktrack) < 0)
|
|
return false;
|
|
from = from.previousSibling;
|
|
}
|
|
// If we are at the end of the document, do nothing.
|
|
if (from && !from.nextSibling)
|
|
return false;
|
|
|
|
// Check whether a part (<span> node) and the corresponding token
|
|
// match.
|
|
function correctPart(token, part){
|
|
return !part.reduced && part.currentText == token.value && part.className == token.style;
|
|
}
|
|
// Shorten the text associated with a part by chopping off
|
|
// characters from the front. Note that only the currentText
|
|
// property gets changed. For efficiency reasons, we leave the
|
|
// nodeValue alone -- we set the reduced flag to indicate that
|
|
// this part must be replaced.
|
|
function shortenPart(part, minus){
|
|
part.currentText = part.currentText.substring(minus);
|
|
part.reduced = true;
|
|
}
|
|
// Create a part corresponding to a given token.
|
|
function tokenPart(token){
|
|
var part = makePartSpan(token.value, self.doc);
|
|
part.className = token.style;
|
|
return part;
|
|
}
|
|
|
|
function maybeTouch(node) {
|
|
if (node) {
|
|
var old = node.oldNextSibling;
|
|
if (lineDirty || old === undefined || node.nextSibling != old)
|
|
self.history.touch(node);
|
|
node.oldNextSibling = node.nextSibling;
|
|
}
|
|
else {
|
|
var old = self.container.oldFirstChild;
|
|
if (lineDirty || old === undefined || self.container.firstChild != old)
|
|
self.history.touch(null);
|
|
self.container.oldFirstChild = self.container.firstChild;
|
|
}
|
|
}
|
|
|
|
// Get the token stream. If from is null, we start with a new
|
|
// parser from the start of the frame, otherwise a partial parse
|
|
// is resumed.
|
|
var traversal = traverseDOM(from ? from.nextSibling : container.firstChild),
|
|
stream = stringStream(traversal),
|
|
parsed = from ? from.parserFromHere(stream) : Editor.Parser.make(stream);
|
|
|
|
function surroundedByBRs(node) {
|
|
return (node.previousSibling == null || isBR(node.previousSibling)) &&
|
|
(node.nextSibling == null || isBR(node.nextSibling));
|
|
}
|
|
|
|
// parts is an interface to make it possible to 'delay' fetching
|
|
// the next DOM node until we are completely done with the one
|
|
// before it. This is necessary because often the next node is
|
|
// not yet available when we want to proceed past the current
|
|
// one.
|
|
var parts = {
|
|
current: null,
|
|
// Fetch current node.
|
|
get: function(){
|
|
if (!this.current)
|
|
this.current = traversal.nodes.shift();
|
|
return this.current;
|
|
},
|
|
// Advance to the next part (do not fetch it yet).
|
|
next: function(){
|
|
this.current = null;
|
|
},
|
|
// Remove the current part from the DOM tree, and move to the
|
|
// next.
|
|
remove: function(){
|
|
container.removeChild(this.get());
|
|
this.current = null;
|
|
},
|
|
// Advance to the next part that is not empty, discarding empty
|
|
// parts.
|
|
getNonEmpty: function(){
|
|
var part = this.get();
|
|
// Allow empty nodes when they are alone on a line, needed
|
|
// for the FF cursor bug workaround (see select.js,
|
|
// insertNewlineAtCursor).
|
|
while (part && isSpan(part) && part.currentText == "") {
|
|
// Leave empty nodes that are alone on a line alone in
|
|
// Opera, since that browsers doesn't deal well with
|
|
// having 2 BRs in a row.
|
|
if (window.opera && surroundedByBRs(part)) {
|
|
this.next();
|
|
part = this.get();
|
|
}
|
|
else {
|
|
var old = part;
|
|
this.remove();
|
|
part = this.get();
|
|
// Adjust selection information, if any. See select.js for details.
|
|
select.snapshotMove(old.firstChild, part && (part.firstChild || part), 0);
|
|
}
|
|
}
|
|
|
|
return part;
|
|
}
|
|
};
|
|
|
|
var lineDirty = false, prevLineDirty = true, lineNodes = 0;
|
|
|
|
// This forEach loops over the tokens from the parsed stream, and
|
|
// at the same time uses the parts object to proceed through the
|
|
// corresponding DOM nodes.
|
|
forEach(parsed, function(token){
|
|
var part = parts.getNonEmpty();
|
|
|
|
if (token.value == "\n"){
|
|
// The idea of the two streams actually staying synchronized
|
|
// is such a long shot that we explicitly check.
|
|
if (!isBR(part))
|
|
throw "Parser out of sync. Expected BR.";
|
|
|
|
if (part.dirty || !part.indentation) lineDirty = true;
|
|
maybeTouch(from);
|
|
from = part;
|
|
|
|
// Every <br> gets a copy of the parser state and a lexical
|
|
// context assigned to it. The first is used to be able to
|
|
// later resume parsing from this point, the second is used
|
|
// for indentation.
|
|
part.parserFromHere = parsed.copy();
|
|
part.indentation = token.indentation;
|
|
part.dirty = false;
|
|
|
|
// If the target argument wasn't an integer, go at least
|
|
// until that node.
|
|
if (endTime == null && part == target) throw StopIteration;
|
|
|
|
// A clean line with more than one node means we are done.
|
|
// Throwing a StopIteration is the way to break out of a
|
|
// MochiKit forEach loop.
|
|
if ((endTime != null && time() >= endTime) || (!lineDirty && !prevLineDirty && lineNodes > 1 && !cleanLines))
|
|
throw StopIteration;
|
|
prevLineDirty = lineDirty; lineDirty = false; lineNodes = 0;
|
|
parts.next();
|
|
}
|
|
else {
|
|
if (!isSpan(part))
|
|
throw "Parser out of sync. Expected SPAN.";
|
|
if (part.dirty)
|
|
lineDirty = true;
|
|
lineNodes++;
|
|
|
|
// If the part matches the token, we can leave it alone.
|
|
if (correctPart(token, part)){
|
|
part.dirty = false;
|
|
parts.next();
|
|
}
|
|
// Otherwise, we have to fix it.
|
|
else {
|
|
lineDirty = true;
|
|
// Insert the correct part.
|
|
var newPart = tokenPart(token);
|
|
container.insertBefore(newPart, part);
|
|
if (active) active(newPart, token, self);
|
|
var tokensize = token.value.length;
|
|
var offset = 0;
|
|
// Eat up parts until the text for this token has been
|
|
// removed, adjusting the stored selection info (see
|
|
// select.js) in the process.
|
|
while (tokensize > 0) {
|
|
part = parts.get();
|
|
var partsize = part.currentText.length;
|
|
select.snapshotReplaceNode(part.firstChild, newPart.firstChild, tokensize, offset);
|
|
if (partsize > tokensize){
|
|
shortenPart(part, tokensize);
|
|
tokensize = 0;
|
|
}
|
|
else {
|
|
tokensize -= partsize;
|
|
offset += partsize;
|
|
parts.remove();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
});
|
|
maybeTouch(from);
|
|
webkitLastLineHack(this.container);
|
|
|
|
// The function returns some status information that is used by
|
|
// hightlightDirty to determine whether and where it has to
|
|
// continue.
|
|
return {node: parts.getNonEmpty(),
|
|
dirty: lineDirty};
|
|
}
|
|
};
|
|
|
|
return Editor;
|
|
})();
|
|
|
|
addEventHandler(window, "load", function() {
|
|
var CodeMirror = window.frameElement.CodeMirror;
|
|
var e = CodeMirror.editor = new Editor(CodeMirror.options);
|
|
this.parent.setTimeout(method(CodeMirror, "init"), 0);
|
|
});
|