Current File : /home/admin/public_html/old/components/com_jce/editor/tiny_mce/plugins/source/js/codemirror/base.js
/* A few useful utility functions. */
// Capture a method on an object.
function method(obj, name) {
return function() {obj[name].apply(obj, arguments);};
}
// The value used to signal the end of a sequence in iterators.
var StopIteration = {toString: function() {return "StopIteration"}};
// Apply a function to each element in a sequence.
function forEach(iter, f) {
if (iter.next) {
try {while (true) f(iter.next());}
catch (e) {if (e != StopIteration) throw e;}
}
else {
for (var i = 0; i < iter.length; i++)
f(iter[i]);
}
}
// Map a function over a sequence, producing an array of results.
function map(iter, f) {
var accum = [];
forEach(iter, function(val) {accum.push(f(val));});
return accum;
}
// Create a predicate function that tests a string againsts a given
// regular expression. No longer used but might be used by 3rd party
// parsers.
function matcher(regexp){
return function(value){return regexp.test(value);};
}
// Test whether a DOM node has a certain CSS class.
function hasClass(element, className) {
var classes = element.className;
return classes && new RegExp("(^| )" + className + "($| )").test(classes);
}
function removeClass(element, className) {
element.className = element.className.replace(new RegExp(" " + className + "\\b", "g"), "");
return element;
}
// Insert a DOM node after another node.
function insertAfter(newNode, oldNode) {
var parent = oldNode.parentNode;
parent.insertBefore(newNode, oldNode.nextSibling);
return newNode;
}
function removeElement(node) {
if (node.parentNode)
node.parentNode.removeChild(node);
}
function clearElement(node) {
while (node.firstChild)
node.removeChild(node.firstChild);
}
// Check whether a node is contained in another one.
function isAncestor(node, child) {
while (child = child.parentNode) {
if (node == child)
return true;
}
return false;
}
// The non-breaking space character.
var nbsp = "\u00a0";
var matching = {"{": "}", "[": "]", "(": ")",
"}": "{", "]": "[", ")": "("};
// Standardize a few unportable event properties.
function normalizeEvent(event) {
if (!event.stopPropagation) {
event.stopPropagation = function() {this.cancelBubble = true;};
event.preventDefault = function() {this.returnValue = false;};
}
if (!event.stop) {
event.stop = function() {
this.stopPropagation();
this.preventDefault();
};
}
if (event.type == "keypress") {
event.code = (event.charCode == null) ? event.keyCode : event.charCode;
event.character = String.fromCharCode(event.code);
}
return event;
}
// Portably register event handlers.
function addEventHandler(node, type, handler, removeFunc) {
function wrapHandler(event) {
handler(normalizeEvent(event || window.event));
}
if (typeof node.addEventListener == "function") {
node.addEventListener(type, wrapHandler, false);
if (removeFunc) return function() {node.removeEventListener(type, wrapHandler, false);};
}
else {
node.attachEvent("on" + type, wrapHandler);
if (removeFunc) return function() {node.detachEvent("on" + type, wrapHandler);};
}
}
function nodeText(node) {
return node.textContent || node.innerText || node.nodeValue || "";
}
function nodeTop(node) {
var top = 0;
while (node.offsetParent) {
top += node.offsetTop;
node = node.offsetParent;
}
return top;
}
function isBR(node) {
var nn = node.nodeName;
return nn == "BR" || nn == "br";
}
function isSpan(node) {
var nn = node.nodeName;
return nn == "SPAN" || nn == "span";
}
/* String streams are the things fed to parsers (which can feed them
* to a tokenizer if they want). They provide peek and next methods
* for looking at the current character (next 'consumes' this
* character, peek does not), and a get method for retrieving all the
* text that was consumed since the last time get was called.
*
* An easy mistake to make is to let a StopIteration exception finish
* the token stream while there are still characters pending in the
* string stream (hitting the end of the buffer while parsing a
* token). To make it easier to detect such errors, the stringstreams
* throw an exception when this happens.
*/
// Make a stringstream stream out of an iterator that returns strings.
// This is applied to the result of traverseDOM (see codemirror.js),
// and the resulting stream is fed to the parser.
var stringStream = function(source){
// String that's currently being iterated over.
var current = "";
// Position in that string.
var pos = 0;
// Accumulator for strings that have been iterated over but not
// get()-ed yet.
var accum = "";
// Make sure there are more characters ready, or throw
// StopIteration.
function ensureChars() {
while (pos == current.length) {
accum += current;
current = ""; // In case source.next() throws
pos = 0;
try {current = source.next();}
catch (e) {
if (e != StopIteration) throw e;
else return false;
}
}
return true;
}
return {
// peek: -> character
// Return the next character in the stream.
peek: function() {
if (!ensureChars()) return null;
return current.charAt(pos);
},
// next: -> character
// Get the next character, throw StopIteration if at end, check
// for unused content.
next: function() {
if (!ensureChars()) {
if (accum.length > 0)
throw "End of stringstream reached without emptying buffer ('" + accum + "').";
else
throw StopIteration;
}
return current.charAt(pos++);
},
// get(): -> string
// Return the characters iterated over since the last call to
// .get().
get: function() {
var temp = accum;
accum = "";
if (pos > 0){
temp += current.slice(0, pos);
current = current.slice(pos);
pos = 0;
}
return temp;
},
// Push a string back into the stream.
push: function(str) {
current = current.slice(0, pos) + str + current.slice(pos);
},
lookAhead: function(str, consume, skipSpaces, caseInsensitive) {
function cased(str) {return caseInsensitive ? str.toLowerCase() : str;}
str = cased(str);
var found = false;
var _accum = accum, _pos = pos;
if (skipSpaces) this.nextWhileMatches(/[\s\u00a0]/);
while (true) {
var end = pos + str.length, left = current.length - pos;
if (end <= current.length) {
found = str == cased(current.slice(pos, end));
pos = end;
break;
}
else if (str.slice(0, left) == cased(current.slice(pos))) {
accum += current; current = "";
try {current = source.next();}
catch (e) {if (e != StopIteration) throw e; break;}
pos = 0;
str = str.slice(left);
}
else {
break;
}
}
if (!(found && consume)) {
current = accum.slice(_accum.length) + current;
pos = _pos;
accum = _accum;
}
return found;
},
// Wont't match past end of line.
lookAheadRegex: function(regex, consume) {
if (regex.source.charAt(0) != "^")
throw new Error("Regexps passed to lookAheadRegex must start with ^");
// Fetch the rest of the line
while (current.indexOf("\n", pos) == -1) {
try {current += source.next();}
catch (e) {if (e != StopIteration) throw e; break;}
}
var matched = current.slice(pos).match(regex);
if (matched && consume) pos += matched[0].length;
return matched;
},
// Utils built on top of the above
// more: -> boolean
// Produce true if the stream isn't empty.
more: function() {
return this.peek() !== null;
},
applies: function(test) {
var next = this.peek();
return (next !== null && test(next));
},
nextWhile: function(test) {
var next;
while ((next = this.peek()) !== null && test(next))
this.next();
},
matches: function(re) {
var next = this.peek();
return (next !== null && re.test(next));
},
nextWhileMatches: function(re) {
var next;
while ((next = this.peek()) !== null && re.test(next))
this.next();
},
equals: function(ch) {
return ch === this.peek();
},
endOfLine: function() {
var next = this.peek();
return next == null || next == "\n";
}
};
};
/* Functionality for finding, storing, and restoring selections
*
* This does not provide a generic API, just the minimal functionality
* required by the CodeMirror system.
*/
// Namespace object.
var select = {};
(function() {
select.ie_selection = document.selection && document.selection.createRangeCollection;
// Find the 'top-level' (defined as 'a direct child of the node
// passed as the top argument') node that the given node is
// contained in. Return null if the given node is not inside the top
// node.
function topLevelNodeAt(node, top) {
while (node && node.parentNode != top)
node = node.parentNode;
return node;
}
// Find the top-level node that contains the node before this one.
function topLevelNodeBefore(node, top) {
while (!node.previousSibling && node.parentNode != top)
node = node.parentNode;
return topLevelNodeAt(node.previousSibling, top);
}
var fourSpaces = "\u00a0\u00a0\u00a0\u00a0";
select.scrollToNode = function(node, cursor) {
if (!node) return;
var element = node, body = document.body,
html = document.documentElement,
atEnd = !element.nextSibling || !element.nextSibling.nextSibling
|| !element.nextSibling.nextSibling.nextSibling;
// In Opera (and recent Webkit versions), BR elements *always*
// have a offsetTop property of zero.
var compensateHack = 0;
while (element && !element.offsetTop) {
compensateHack++;
element = element.previousSibling;
}
// atEnd is another kludge for these browsers -- if the cursor is
// at the end of the document, and the node doesn't have an
// offset, just scroll to the end.
if (compensateHack == 0) atEnd = false;
// WebKit has a bad habit of (sometimes) happily returning bogus
// offsets when the document has just been changed. This seems to
// always be 5/5, so we don't use those.
if (webkit && element && element.offsetTop == 5 && element.offsetLeft == 5)
return;
var y = compensateHack * (element ? element.offsetHeight : 0), x = 0,
width = (node ? node.offsetWidth : 0), pos = element;
while (pos && pos.offsetParent) {
y += pos.offsetTop;
// Don't count X offset for <br> nodes
if (!isBR(pos))
x += pos.offsetLeft;
pos = pos.offsetParent;
}
var scroll_x = body.scrollLeft || html.scrollLeft || 0,
scroll_y = body.scrollTop || html.scrollTop || 0,
scroll = false, screen_width = window.innerWidth || html.clientWidth || 0;
if (cursor || width < screen_width) {
if (cursor) {
var off = select.offsetInNode(node), size = nodeText(node).length;
if (size) x += width * (off / size);
}
var screen_x = x - scroll_x;
if (screen_x < 0 || screen_x > screen_width) {
scroll_x = x;
scroll = true;
}
}
var screen_y = y - scroll_y;
if (screen_y < 0 || atEnd || screen_y > (window.innerHeight || html.clientHeight || 0) - 50) {
scroll_y = atEnd ? 1e6 : y;
scroll = true;
}
if (scroll) window.scrollTo(scroll_x, scroll_y);
};
select.scrollToCursor = function(container) {
select.scrollToNode(select.selectionTopNode(container, true) || container.firstChild, true);
};
// Used to prevent restoring a selection when we do not need to.
var currentSelection = null;
select.snapshotChanged = function() {
if (currentSelection) currentSelection.changed = true;
};
// Find the 'leaf' node (BR or text) after the given one.
function baseNodeAfter(node) {
var next = node.nextSibling;
if (next) {
while (next.firstChild) next = next.firstChild;
if (next.nodeType == 3 || isBR(next)) return next;
else return baseNodeAfter(next);
}
else {
var parent = node.parentNode;
while (parent && !parent.nextSibling) parent = parent.parentNode;
return parent && baseNodeAfter(parent);
}
}
// This is called by the code in editor.js whenever it is replacing
// a text node. The function sees whether the given oldNode is part
// of the current selection, and updates this selection if it is.
// Because nodes are often only partially replaced, the length of
// the part that gets replaced has to be taken into account -- the
// selection might stay in the oldNode if the newNode is smaller
// than the selection's offset. The offset argument is needed in
// case the selection does move to the new object, and the given
// length is not the whole length of the new node (part of it might
// have been used to replace another node).
select.snapshotReplaceNode = function(from, to, length, offset) {
if (!currentSelection) return;
function replace(point) {
if (from == point.node) {
currentSelection.changed = true;
if (length && point.offset > length) {
point.offset -= length;
}
else {
point.node = to;
point.offset += (offset || 0);
}
}
else if (select.ie_selection && point.offset == 0 && point.node == baseNodeAfter(from)) {
currentSelection.changed = true;
}
}
replace(currentSelection.start);
replace(currentSelection.end);
};
select.snapshotMove = function(from, to, distance, relative, ifAtStart) {
if (!currentSelection) return;
function move(point) {
if (from == point.node && (!ifAtStart || point.offset == 0)) {
currentSelection.changed = true;
point.node = to;
if (relative) point.offset = Math.max(0, point.offset + distance);
else point.offset = distance;
}
}
move(currentSelection.start);
move(currentSelection.end);
};
// Most functions are defined in two ways, one for the IE selection
// model, one for the W3C one.
if (select.ie_selection) {
function selRange() {
var sel = document.selection;
if (!sel) return null;
if (sel.createRange) return sel.createRange();
else return sel.createTextRange();
}
function selectionNode(start) {
var range = selRange();
range.collapse(start);
function nodeAfter(node) {
var found = null;
while (!found && node) {
found = node.nextSibling;
node = node.parentNode;
}
return nodeAtStartOf(found);
}
function nodeAtStartOf(node) {
while (node && node.firstChild) node = node.firstChild;
return {node: node, offset: 0};
}
var containing = range.parentElement();
if (!isAncestor(document.body, containing)) return null;
if (!containing.firstChild) return nodeAtStartOf(containing);
var working = range.duplicate();
working.moveToElementText(containing);
working.collapse(true);
for (var cur = containing.firstChild; cur; cur = cur.nextSibling) {
if (cur.nodeType == 3) {
var size = cur.nodeValue.length;
working.move("character", size);
}
else {
working.moveToElementText(cur);
working.collapse(false);
}
var dir = range.compareEndPoints("StartToStart", working);
if (dir == 0) return nodeAfter(cur);
if (dir == 1) continue;
if (cur.nodeType != 3) return nodeAtStartOf(cur);
working.setEndPoint("StartToEnd", range);
return {node: cur, offset: size - working.text.length};
}
return nodeAfter(containing);
}
select.markSelection = function() {
currentSelection = null;
var sel = document.selection;
if (!sel) return;
var start = selectionNode(true),
end = selectionNode(false);
if (!start || !end) return;
currentSelection = {start: start, end: end, changed: false};
};
select.selectMarked = function() {
if (!currentSelection || !currentSelection.changed) return;
function makeRange(point) {
var range = document.body.createTextRange(),
node = point.node;
if (!node) {
range.moveToElementText(document.body);
range.collapse(false);
}
else if (node.nodeType == 3) {
range.moveToElementText(node.parentNode);
var offset = point.offset;
while (node.previousSibling) {
node = node.previousSibling;
offset += (node.innerText || "").length;
}
range.move("character", offset);
}
else {
range.moveToElementText(node);
range.collapse(true);
}
return range;
}
var start = makeRange(currentSelection.start), end = makeRange(currentSelection.end);
start.setEndPoint("StartToEnd", end);
start.select();
};
select.offsetInNode = function(node) {
var range = selRange();
if (!range) return 0;
var range2 = range.duplicate();
try {range2.moveToElementText(node);} catch(e){return 0;}
range.setEndPoint("StartToStart", range2);
return range.text.length;
};
// Get the top-level node that one end of the cursor is inside or
// after. Note that this returns false for 'no cursor', and null
// for 'start of document'.
select.selectionTopNode = function(container, start) {
var range = selRange();
if (!range) return false;
var range2 = range.duplicate();
range.collapse(start);
var around = range.parentElement();
if (around && isAncestor(container, around)) {
// Only use this node if the selection is not at its start.
range2.moveToElementText(around);
if (range.compareEndPoints("StartToStart", range2) == 1)
return topLevelNodeAt(around, container);
}
// Move the start of a range to the start of a node,
// compensating for the fact that you can't call
// moveToElementText with text nodes.
function moveToNodeStart(range, node) {
if (node.nodeType == 3) {
var count = 0, cur = node.previousSibling;
while (cur && cur.nodeType == 3) {
count += cur.nodeValue.length;
cur = cur.previousSibling;
}
if (cur) {
try{range.moveToElementText(cur);}
catch(e){return false;}
range.collapse(false);
}
else range.moveToElementText(node.parentNode);
if (count) range.move("character", count);
}
else {
try{range.moveToElementText(node);}
catch(e){return false;}
}
return true;
}
// Do a binary search through the container object, comparing
// the start of each node to the selection
var start = 0, end = container.childNodes.length - 1;
while (start < end) {
var middle = Math.ceil((end + start) / 2), node = container.childNodes[middle];
if (!node) return false; // Don't ask. IE6 manages this sometimes.
if (!moveToNodeStart(range2, node)) return false;
if (range.compareEndPoints("StartToStart", range2) == 1)
start = middle;
else
end = middle - 1;
}
if (start == 0) {
var test1 = selRange(), test2 = test1.duplicate();
try {
test2.moveToElementText(container);
} catch(exception) {
return null;
}
if (test1.compareEndPoints("StartToStart", test2) == 0)
return null;
}
return container.childNodes[start] || null;
};
// Place the cursor after this.start. This is only useful when
// manually moving the cursor instead of restoring it to its old
// position.
select.focusAfterNode = function(node, container) {
var range = document.body.createTextRange();
range.moveToElementText(node || container);
range.collapse(!node);
range.select();
};
select.somethingSelected = function() {
var range = selRange();
return range && (range.text != "");
};
function insertAtCursor(html) {
var range = selRange();
if (range) {
range.pasteHTML(html);
range.collapse(false);
range.select();
}
}
// Used to normalize the effect of the enter key, since browsers
// do widely different things when pressing enter in designMode.
select.insertNewlineAtCursor = function() {
insertAtCursor("<br>");
};
select.insertTabAtCursor = function() {
insertAtCursor(fourSpaces);
};
// Get the BR node at the start of the line on which the cursor
// currently is, and the offset into the line. Returns null as
// node if cursor is on first line.
select.cursorPos = function(container, start) {
var range = selRange();
if (!range) return null;
var topNode = select.selectionTopNode(container, start);
while (topNode && !isBR(topNode))
topNode = topNode.previousSibling;
var range2 = range.duplicate();
range.collapse(start);
if (topNode) {
range2.moveToElementText(topNode);
range2.collapse(false);
}
else {
// When nothing is selected, we can get all kinds of funky errors here.
try { range2.moveToElementText(container); }
catch (e) { return null; }
range2.collapse(true);
}
range.setEndPoint("StartToStart", range2);
return {node: topNode, offset: range.text.length};
};
select.setCursorPos = function(container, from, to) {
function rangeAt(pos) {
var range = document.body.createTextRange();
if (!pos.node) {
range.moveToElementText(container);
range.collapse(true);
}
else {
range.moveToElementText(pos.node);
range.collapse(false);
}
range.move("character", pos.offset);
return range;
}
var range = rangeAt(from);
if (to && to != from)
range.setEndPoint("EndToEnd", rangeAt(to));
range.select();
}
// Some hacks for storing and re-storing the selection when the editor loses and regains focus.
select.getBookmark = function (container) {
var from = select.cursorPos(container, true), to = select.cursorPos(container, false);
if (from && to) return {from: from, to: to};
};
// Restore a stored selection.
select.setBookmark = function(container, mark) {
if (!mark) return;
select.setCursorPos(container, mark.from, mark.to);
};
}
// W3C model
else {
// Find the node right at the cursor, not one of its
// ancestors with a suitable offset. This goes down the DOM tree
// until a 'leaf' is reached (or is it *up* the DOM tree?).
function innerNode(node, offset) {
while (node.nodeType != 3 && !isBR(node)) {
var newNode = node.childNodes[offset] || node.nextSibling;
offset = 0;
while (!newNode && node.parentNode) {
node = node.parentNode;
newNode = node.nextSibling;
}
node = newNode;
if (!newNode) break;
}
return {node: node, offset: offset};
}
// Store start and end nodes, and offsets within these, and refer
// back to the selection object from those nodes, so that this
// object can be updated when the nodes are replaced before the
// selection is restored.
select.markSelection = function () {
var selection = window.getSelection();
if (!selection || selection.rangeCount == 0)
return (currentSelection = null);
var range = selection.getRangeAt(0);
currentSelection = {
start: innerNode(range.startContainer, range.startOffset),
end: innerNode(range.endContainer, range.endOffset),
changed: false
};
};
select.selectMarked = function () {
var cs = currentSelection;
// on webkit-based browsers, it is apparently possible that the
// selection gets reset even when a node that is not one of the
// endpoints get messed with. the most common situation where
// this occurs is when a selection is deleted or overwitten. we
// check for that here.
function focusIssue() {
if (cs.start.node == cs.end.node && cs.start.offset == cs.end.offset) {
var selection = window.getSelection();
if (!selection || selection.rangeCount == 0) return true;
var range = selection.getRangeAt(0), point = innerNode(range.startContainer, range.startOffset);
return cs.start.node != point.node || cs.start.offset != point.offset;
}
}
if (!cs || !(cs.changed || (webkit && focusIssue()))) return;
var range = document.createRange();
function setPoint(point, which) {
if (point.node) {
// Some magic to generalize the setting of the start and end
// of a range.
if (point.offset == 0)
range["set" + which + "Before"](point.node);
else
range["set" + which](point.node, point.offset);
}
else {
range.setStartAfter(document.body.lastChild || document.body);
}
}
setPoint(cs.end, "End");
setPoint(cs.start, "Start");
selectRange(range);
};
// Helper for selecting a range object.
function selectRange(range) {
var selection = window.getSelection();
if (!selection) return;
selection.removeAllRanges();
selection.addRange(range);
}
function selectionRange() {
var selection = window.getSelection();
if (!selection || selection.rangeCount == 0)
return false;
else
return selection.getRangeAt(0);
}
// Finding the top-level node at the cursor in the W3C is, as you
// can see, quite an involved process.
select.selectionTopNode = function(container, start) {
var range = selectionRange();
if (!range) return false;
var node = start ? range.startContainer : range.endContainer;
var offset = start ? range.startOffset : range.endOffset;
// Work around (yet another) bug in Opera's selection model.
if (window.opera && !start && range.endContainer == container && range.endOffset == range.startOffset + 1 &&
container.childNodes[range.startOffset] && isBR(container.childNodes[range.startOffset]))
offset--;
// For text nodes, we look at the node itself if the cursor is
// inside, or at the node before it if the cursor is at the
// start.
if (node.nodeType == 3){
if (offset > 0)
return topLevelNodeAt(node, container);
else
return topLevelNodeBefore(node, container);
}
// Occasionally, browsers will return the HTML node as
// selection. If the offset is 0, we take the start of the frame
// ('after null'), otherwise, we take the last node.
else if (node.nodeName.toUpperCase() == "HTML") {
return (offset == 1 ? null : container.lastChild);
}
// If the given node is our 'container', we just look up the
// correct node by using the offset.
else if (node == container) {
return (offset == 0) ? null : node.childNodes[offset - 1];
}
// In any other case, we have a regular node. If the cursor is
// at the end of the node, we use the node itself, if it is at
// the start, we use the node before it, and in any other
// case, we look up the child before the cursor and use that.
else {
if (offset == node.childNodes.length)
return topLevelNodeAt(node, container);
else if (offset == 0)
return topLevelNodeBefore(node, container);
else
return topLevelNodeAt(node.childNodes[offset - 1], container);
}
};
select.focusAfterNode = function(node, container) {
var range = document.createRange();
range.setStartBefore(container.firstChild || container);
// In Opera, setting the end of a range at the end of a line
// (before a BR) will cause the cursor to appear on the next
// line, so we set the end inside of the start node when
// possible.
if (node && !node.firstChild)
range.setEndAfter(node);
else if (node)
range.setEnd(node, node.childNodes.length);
else
range.setEndBefore(container.firstChild || container);
range.collapse(false);
selectRange(range);
};
select.somethingSelected = function() {
var range = selectionRange();
return range && !range.collapsed;
};
select.offsetInNode = function(node) {
var range = selectionRange();
if (!range) return 0;
range = range.cloneRange();
range.setStartBefore(node);
return range.toString().length;
};
select.insertNodeAtCursor = function(node) {
var range = selectionRange();
if (!range) return;
range.deleteContents();
range.insertNode(node);
webkitLastLineHack(document.body);
// work around weirdness where Opera will magically insert a new
// BR node when a BR node inside a span is moved around. makes
// sure the BR ends up outside of spans.
if (window.opera && isBR(node) && isSpan(node.parentNode)) {
var next = node.nextSibling, p = node.parentNode, outer = p.parentNode;
outer.insertBefore(node, p.nextSibling);
var textAfter = "";
for (; next && next.nodeType == 3; next = next.nextSibling) {
textAfter += next.nodeValue;
removeElement(next);
}
outer.insertBefore(makePartSpan(textAfter, document), node.nextSibling);
}
range = document.createRange();
range.selectNode(node);
range.collapse(false);
selectRange(range);
}
select.insertNewlineAtCursor = function() {
select.insertNodeAtCursor(document.createElement("BR"));
};
select.insertTabAtCursor = function() {
select.insertNodeAtCursor(document.createTextNode(fourSpaces));
};
select.cursorPos = function(container, start) {
var range = selectionRange();
if (!range) return;
var topNode = select.selectionTopNode(container, start);
while (topNode && !isBR(topNode))
topNode = topNode.previousSibling;
range = range.cloneRange();
range.collapse(start);
if (topNode)
range.setStartAfter(topNode);
else
range.setStartBefore(container);
var text = range.toString();
return {node: topNode, offset: text.length};
};
select.setCursorPos = function(container, from, to) {
var range = document.createRange();
function setPoint(node, offset, side) {
if (offset == 0 && node && !node.nextSibling) {
range["set" + side + "After"](node);
return true;
}
if (!node)
node = container.firstChild;
else
node = node.nextSibling;
if (!node) return;
if (offset == 0) {
range["set" + side + "Before"](node);
return true;
}
var backlog = []
function decompose(node) {
if (node.nodeType == 3)
backlog.push(node);
else
forEach(node.childNodes, decompose);
}
while (true) {
while (node && !backlog.length) {
decompose(node);
node = node.nextSibling;
}
var cur = backlog.shift();
if (!cur) return false;
var length = cur.nodeValue.length;
if (length >= offset) {
range["set" + side](cur, offset);
return true;
}
offset -= length;
}
}
to = to || from;
if (setPoint(to.node, to.offset, "End") && setPoint(from.node, from.offset, "Start"))
selectRange(range);
};
}
})();
/**
* Storage and control for undo information within a CodeMirror
* editor. 'Why on earth is such a complicated mess required for
* that?', I hear you ask. The goal, in implementing this, was to make
* the complexity of storing and reverting undo information depend
* only on the size of the edited or restored content, not on the size
* of the whole document. This makes it necessary to use a kind of
* 'diff' system, which, when applied to a DOM tree, causes some
* complexity and hackery.
*
* In short, the editor 'touches' BR elements as it parses them, and
* the UndoHistory stores these. When nothing is touched in commitDelay
* milliseconds, the changes are committed: It goes over all touched
* nodes, throws out the ones that did not change since last commit or
* are no longer in the document, and assembles the rest into zero or
* more 'chains' -- arrays of adjacent lines. Links back to these
* chains are added to the BR nodes, while the chain that previously
* spanned these nodes is added to the undo history. Undoing a change
* means taking such a chain off the undo history, restoring its
* content (text is saved per line) and linking it back into the
* document.
*/
// A history object needs to know about the DOM container holding the
// document, the maximum amount of undo levels it should store, the
// delay (of no input) after which it commits a set of changes, and,
// unfortunately, the 'parent' window -- a window that is not in
// designMode, and on which setTimeout works in every browser.
function UndoHistory(container, maxDepth, commitDelay, editor) {
this.container = container;
this.maxDepth = maxDepth; this.commitDelay = commitDelay;
this.editor = editor;
// This line object represents the initial, empty editor.
var initial = {text: "", from: null, to: null};
// As the borders between lines are represented by BR elements, the
// start of the first line and the end of the last one are
// represented by null. Since you can not store any properties
// (links to line objects) in null, these properties are used in
// those cases.
this.first = initial; this.last = initial;
// Similarly, a 'historyTouched' property is added to the BR in
// front of lines that have already been touched, and 'firstTouched'
// is used for the first line.
this.firstTouched = false;
// History is the set of committed changes, touched is the set of
// nodes touched since the last commit.
this.history = []; this.redoHistory = []; this.touched = []; this.lostundo = 0;
}
UndoHistory.prototype = {
// Schedule a commit (if no other touches come in for commitDelay
// milliseconds).
scheduleCommit: function() {
var self = this;
parent.clearTimeout(this.commitTimeout);
this.commitTimeout = parent.setTimeout(function(){self.tryCommit();}, this.commitDelay);
},
// Mark a node as touched. Null is a valid argument.
touch: function(node) {
this.setTouched(node);
this.scheduleCommit();
},
// Undo the last change.
undo: function() {
// Make sure pending changes have been committed.
this.commit();
if (this.history.length) {
// Take the top diff from the history, apply it, and store its
// shadow in the redo history.
var item = this.history.pop();
this.redoHistory.push(this.updateTo(item, "applyChain"));
this.notifyEnvironment();
return this.chainNode(item);
}
},
// Redo the last undone change.
redo: function() {
this.commit();
if (this.redoHistory.length) {
// The inverse of undo, basically.
var item = this.redoHistory.pop();
this.addUndoLevel(this.updateTo(item, "applyChain"));
this.notifyEnvironment();
return this.chainNode(item);
}
},
clear: function() {
this.history = [];
this.redoHistory = [];
this.lostundo = 0;
},
// Ask for the size of the un/redo histories.
historySize: function() {
return {undo: this.history.length, redo: this.redoHistory.length, lostundo: this.lostundo};
},
// Push a changeset into the document.
push: function(from, to, lines) {
var chain = [];
for (var i = 0; i < lines.length; i++) {
var end = (i == lines.length - 1) ? to : document.createElement("br");
chain.push({from: from, to: end, text: cleanText(lines[i])});
from = end;
}
this.pushChains([chain], from == null && to == null);
this.notifyEnvironment();
},
pushChains: function(chains, doNotHighlight) {
this.commit(doNotHighlight);
this.addUndoLevel(this.updateTo(chains, "applyChain"));
this.redoHistory = [];
},
// Retrieve a DOM node from a chain (for scrolling to it after undo/redo).
chainNode: function(chains) {
for (var i = 0; i < chains.length; i++) {
var start = chains[i][0], node = start && (start.from || start.to);
if (node) return node;
}
},
// Clear the undo history, make the current document the start
// position.
reset: function() {
this.history = []; this.redoHistory = []; this.lostundo = 0;
},
textAfter: function(br) {
return this.after(br).text;
},
nodeAfter: function(br) {
return this.after(br).to;
},
nodeBefore: function(br) {
return this.before(br).from;
},
// Commit unless there are pending dirty nodes.
tryCommit: function() {
if (!window || !window.parent || !window.UndoHistory) return; // Stop when frame has been unloaded
if (this.editor.highlightDirty()) this.commit(true);
else this.scheduleCommit();
},
// Check whether the touched nodes hold any changes, if so, commit
// them.
commit: function(doNotHighlight) {
parent.clearTimeout(this.commitTimeout);
// Make sure there are no pending dirty nodes.
if (!doNotHighlight) this.editor.highlightDirty(true);
// Build set of chains.
var chains = this.touchedChains(), self = this;
if (chains.length) {
this.addUndoLevel(this.updateTo(chains, "linkChain"));
this.redoHistory = [];
this.notifyEnvironment();
}
},
// [ end of public interface ]
// Update the document with a given set of chains, return its
// shadow. updateFunc should be "applyChain" or "linkChain". In the
// second case, the chains are taken to correspond the the current
// document, and only the state of the line data is updated. In the
// first case, the content of the chains is also pushed iinto the
// document.
updateTo: function(chains, updateFunc) {
var shadows = [], dirty = [];
for (var i = 0; i < chains.length; i++) {
shadows.push(this.shadowChain(chains[i]));
dirty.push(this[updateFunc](chains[i]));
}
if (updateFunc == "applyChain")
this.notifyDirty(dirty);
return shadows;
},
// Notify the editor that some nodes have changed.
notifyDirty: function(nodes) {
forEach(nodes, method(this.editor, "addDirtyNode"))
this.editor.scheduleHighlight();
},
notifyEnvironment: function() {
if (this.onChange) this.onChange(this.editor);
// Used by the line-wrapping line-numbering code.
if (window.frameElement && window.frameElement.CodeMirror.updateNumbers)
window.frameElement.CodeMirror.updateNumbers();
},
// Link a chain into the DOM nodes (or the first/last links for null
// nodes).
linkChain: function(chain) {
for (var i = 0; i < chain.length; i++) {
var line = chain[i];
if (line.from) line.from.historyAfter = line;
else this.first = line;
if (line.to) line.to.historyBefore = line;
else this.last = line;
}
},
// Get the line object after/before a given node.
after: function(node) {
return node ? node.historyAfter : this.first;
},
before: function(node) {
return node ? node.historyBefore : this.last;
},
// Mark a node as touched if it has not already been marked.
setTouched: function(node) {
if (node) {
if (!node.historyTouched) {
this.touched.push(node);
node.historyTouched = true;
}
}
else {
this.firstTouched = true;
}
},
// Store a new set of undo info, throw away info if there is more of
// it than allowed.
addUndoLevel: function(diffs) {
this.history.push(diffs);
if (this.history.length > this.maxDepth) {
this.history.shift();
this.lostundo += 1;
}
},
// Build chains from a set of touched nodes.
touchedChains: function() {
var self = this;
// The temp system is a crummy hack to speed up determining
// whether a (currently touched) node has a line object associated
// with it. nullTemp is used to store the object for the first
// line, other nodes get it stored in their historyTemp property.
var nullTemp = null;
function temp(node) {return node ? node.historyTemp : nullTemp;}
function setTemp(node, line) {
if (node) node.historyTemp = line;
else nullTemp = line;
}
function buildLine(node) {
var text = [];
for (var cur = node ? node.nextSibling : self.container.firstChild;
cur && (!isBR(cur) || cur.hackBR); cur = cur.nextSibling)
if (!cur.hackBR && cur.currentText) text.push(cur.currentText);
return {from: node, to: cur, text: cleanText(text.join(""))};
}
// Filter out unchanged lines and nodes that are no longer in the
// document. Build up line objects for remaining nodes.
var lines = [];
if (self.firstTouched) self.touched.push(null);
forEach(self.touched, function(node) {
if (node && (node.parentNode != self.container || node.hackBR)) return;
if (node) node.historyTouched = false;
else self.firstTouched = false;
var line = buildLine(node), shadow = self.after(node);
if (!shadow || shadow.text != line.text || shadow.to != line.to) {
lines.push(line);
setTemp(node, line);
}
});
// Get the BR element after/before the given node.
function nextBR(node, dir) {
var link = dir + "Sibling", search = node[link];
while (search && !isBR(search))
search = search[link];
return search;
}
// Assemble line objects into chains by scanning the DOM tree
// around them.
var chains = []; self.touched = [];
forEach(lines, function(line) {
// Note that this makes the loop skip line objects that have
// been pulled into chains by lines before them.
if (!temp(line.from)) return;
var chain = [], curNode = line.from, safe = true;
// Put any line objects (referred to by temp info) before this
// one on the front of the array.
while (true) {
var curLine = temp(curNode);
if (!curLine) {
if (safe) break;
else curLine = buildLine(curNode);
}
chain.unshift(curLine);
setTemp(curNode, null);
if (!curNode) break;
safe = self.after(curNode);
curNode = nextBR(curNode, "previous");
}
curNode = line.to; safe = self.before(line.from);
// Add lines after this one at end of array.
while (true) {
if (!curNode) break;
var curLine = temp(curNode);
if (!curLine) {
if (safe) break;
else curLine = buildLine(curNode);
}
chain.push(curLine);
setTemp(curNode, null);
safe = self.before(curNode);
curNode = nextBR(curNode, "next");
}
chains.push(chain);
});
return chains;
},
// Find the 'shadow' of a given chain by following the links in the
// DOM nodes at its start and end.
shadowChain: function(chain) {
var shadows = [], next = this.after(chain[0].from), end = chain[chain.length - 1].to;
while (true) {
shadows.push(next);
var nextNode = next.to;
if (!nextNode || nextNode == end)
break;
else
next = nextNode.historyAfter || this.before(end);
// (The this.before(end) is a hack -- FF sometimes removes
// properties from BR nodes, in which case the best we can hope
// for is to not break.)
}
return shadows;
},
// Update the DOM tree to contain the lines specified in a given
// chain, link this chain into the DOM nodes.
applyChain: function(chain) {
// Some attempt is made to prevent the cursor from jumping
// randomly when an undo or redo happens. It still behaves a bit
// strange sometimes.
var cursor = select.cursorPos(this.container, false), self = this;
// Remove all nodes in the DOM tree between from and to (null for
// start/end of container).
function removeRange(from, to) {
var pos = from ? from.nextSibling : self.container.firstChild;
while (pos != to) {
var temp = pos.nextSibling;
removeElement(pos);
pos = temp;
}
}
var start = chain[0].from, end = chain[chain.length - 1].to;
// Clear the space where this change has to be made.
removeRange(start, end);
// Insert the content specified by the chain into the DOM tree.
for (var i = 0; i < chain.length; i++) {
var line = chain[i];
// The start and end of the space are already correct, but BR
// tags inside it have to be put back.
if (i > 0)
self.container.insertBefore(line.from, end);
// Add the text.
var node = makePartSpan(fixSpaces(line.text));
self.container.insertBefore(node, end);
// See if the cursor was on this line. Put it back, adjusting
// for changed line length, if it was.
if (cursor && cursor.node == line.from) {
var cursordiff = 0;
var prev = this.after(line.from);
if (prev && i == chain.length - 1) {
// Only adjust if the cursor is after the unchanged part of
// the line.
for (var match = 0; match < cursor.offset &&
line.text.charAt(match) == prev.text.charAt(match); match++){}
if (cursor.offset > match)
cursordiff = line.text.length - prev.text.length;
}
select.setCursorPos(this.container, {node: line.from, offset: Math.max(0, cursor.offset + cursordiff)});
}
// Cursor was in removed line, this is last new line.
else if (cursor && (i == chain.length - 1) && cursor.node && cursor.node.parentNode != this.container) {
select.setCursorPos(this.container, {node: line.from, offset: line.text.length});
}
}
// Anchor the chain in the DOM tree.
this.linkChain(chain);
return start;
}
};
/* 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 Computer, Inc/.test(navigator.vendor);
var gecko = navigator.userAgent.match(/gecko\/(\d{8})/i);
if (gecko) gecko = Number(gecko[1]);
var mac = /Mac/.test(navigator.platform);
// TODO this is related to the backspace-at-end-of-line bug. Remove
// this if Opera gets their act together, make the version check more
// broad if they don't.
var brokenOpera = window.opera && /Version\/10.[56]/.test(navigator.userAgent);
// TODO remove this once WebKit 533 becomes less common.
var slowWebkit = /AppleWebKit\/533/.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 ^= true;
}
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) {
var text = value;
if (value.nodeType == 3) text = value.nodeValue;
else value = document.createTextNode(text);
var span = document.createElement("span");
span.isPart = true;
span.appendChild(value);
span.currentText = text;
return span;
}
function alwaysZero() {return 0;}
// 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.hackBR) {
var br = document.createElement("br");
br.hackBR = true;
container.appendChild(br);
}
} : function() {};
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);
}
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};
// Helper function for traverseDOM. Flattens an arbitrary DOM node
// into an array of textnodes and <br> tags.
function simplifyDOM(root, atEnd) {
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 {
for (var n = node.firstChild; n; n = n.nextSibling) simplifyNode(n);
if (!leaving && newlineElements.hasOwnProperty(node.nodeName.toUpperCase())) {
leaving = true;
if (!atEnd || !top)
result.push(document.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.
function traverseDOM(start){
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);
text = part.currentText;
afterBR = false;
}
else {
if (afterBR && window.opera)
point(makePartSpan(""));
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 return the textual content. Used to replace
// non-normalized nodes.
function writeNode(node, end) {
var simplified = simplifyDOM(node, end);
for (var i = 0; i < simplified.length; i++)
simplified[i] = insertPart(simplified[i]);
return simplified.join("");
}
// Check whether a node is a normalized <span> element.
function partNode(node){
if (node.isPart && node.childNodes.length == 1 && node.firstChild.nodeType == 3) {
var text = node.firstChild.nodeValue;
node.dirty = node.dirty || text != node.currentText;
node.currentText = text;
return !/[\n\t\r]/.test(node.currentText);
}
return false;
}
// Advance to next node, return string for current node.
function next() {
if (!start) throw StopIteration;
var node = start;
start = node.nextSibling;
if (partNode(node)){
nodeQueue.push(node);
afterBR = false;
return node.currentText;
}
else if (isBR(node)) {
if (afterBR && window.opera)
node.parentNode.insertBefore(makePartSpan(""), node);
nodeQueue.push(node);
afterBR = true;
return "\n";
}
else {
var end = !node.nextSibling;
point = pointAt(node);
removeElement(node);
return writeNode(node, 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: next, 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, pattern, from, caseFold) {
this.editor = editor;
this.history = editor.history;
this.history.commit();
this.valid = !!pattern;
this.atOccurrence = false;
if (caseFold == undefined) caseFold = typeof pattern == "string" && pattern == pattern.toLowerCase();
function getText(node){
var line = cleanText(editor.history.textAfter(node));
return (caseFold ? line.toLowerCase() : line);
}
var topPos = {node: null, offset: 0}, self = this;
if (from && typeof from == "object" && typeof from.character == "number") {
editor.checkLine(from.line);
var pos = {node: from.line, offset: from.character};
this.pos = {from: pos, to: pos};
}
else if (from) {
this.pos = {from: select.cursorPos(editor.container, true) || topPos,
to: select.cursorPos(editor.container, false) || topPos};
}
else {
this.pos = {from: topPos, to: topPos};
}
if (typeof pattern != "string") { // Regexp match
this.matches = function(reverse, node, offset) {
if (reverse) {
var line = getText(node).slice(0, offset), match = line.match(pattern), start = 0;
while (match) {
var ind = line.indexOf(match[0]);
start += ind;
line = line.slice(ind + 1);
var newmatch = line.match(pattern);
if (newmatch) match = newmatch;
else break;
}
}
else {
var line = getText(node).slice(offset), match = line.match(pattern),
start = match && offset + line.indexOf(match[0]);
}
if (match) {
self.currentMatch = match;
return {from: {node: node, offset: start},
to: {node: node, offset: start + match[0].length}};
}
};
return;
}
if (caseFold) pattern = pattern.toLowerCase();
// Create a matcher function based on the kind of string we have.
var target = pattern.split("\n");
this.matches = (target.length == 1) ?
// For one-line strings, searching can be done simply by calling
// indexOf or lastIndexOf on the current line.
function(reverse, node, offset) {
var line = getText(node), len = pattern.length, match;
if (reverse ? (offset >= len && (match = line.lastIndexOf(pattern, offset - len)) != -1)
: (match = line.indexOf(pattern, offset)) != -1)
return {from: {node: node, offset: match},
to: {node: node, offset: match + len}};
} :
// 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(reverse, node, offset) {
var idx = (reverse ? target.length - 1 : 0), match = target[idx], line = getText(node);
var offsetA = (reverse ? line.indexOf(match) + match.length : line.lastIndexOf(match));
if (reverse ? offsetA >= offset || offsetA != match.length
: offsetA <= offset || offsetA != line.length - match.length)
return;
var pos = node;
while (true) {
if (reverse && !pos) return;
pos = (reverse ? this.history.nodeBefore(pos) : this.history.nodeAfter(pos) );
if (!reverse && !pos) return;
line = getText(pos);
match = target[reverse ? --idx : ++idx];
if (idx > 0 && idx < target.length - 1) {
if (line != match) return;
else continue;
}
var offsetB = (reverse ? line.lastIndexOf(match) : line.indexOf(match) + match.length);
if (reverse ? offsetB != line.length - match.length : offsetB != match.length)
return;
return {from: {node: reverse ? pos : node, offset: reverse ? offsetB : offsetA},
to: {node: reverse ? node : pos, offset: reverse ? offsetA : offsetB}};
}
};
}
SearchCursor.prototype = {
findNext: function() {return this.find(false);},
findPrevious: function() {return this.find(true);},
find: function(reverse) {
if (!this.valid) return false;
var self = this, pos = reverse ? this.pos.from : this.pos.to,
node = pos.node, offset = pos.offset;
// Reset the cursor if the current line is no longer in the DOM tree.
if (node && !node.parentNode) {
node = null; offset = 0;
}
function savePosAndFail() {
var pos = {node: node, offset: offset};
self.pos = {from: pos, to: pos};
self.atOccurrence = false;
return false;
}
while (true) {
if (this.pos = this.matches(reverse, node, offset)) {
this.atOccurrence = true;
return true;
}
if (reverse) {
if (!node) return savePosAndFail();
node = this.history.nodeBefore(node);
offset = this.history.textAfter(node).length;
}
else {
var next = this.history.nodeAfter(node);
if (!next) {
offset = this.history.textAfter(node).length;
return savePosAndFail();
}
node = next;
offset = 0;
}
}
},
select: function() {
if (this.atOccurrence) {
select.setCursorPos(this.editor.container, this.pos.from, this.pos.to);
select.scrollToCursor(this.editor.container);
}
},
replace: function(string) {
if (this.atOccurrence) {
var fragments = this.currentMatch;
if (fragments)
string = string.replace(/\\(\d)/, function(m, i){return fragments[i];});
var end = this.editor.replaceRange(this.pos.from, this.pos.to, string);
this.pos.to = end;
this.atOccurrence = false;
}
},
position: function() {
if (this.atOccurrence)
return {line: this.pos.from.node, character: this.pos.from.offset};
}
};
// The Editor object is the main inside-the-iframe interface.
function Editor(options) {
this.options = options;
window.indentUnit = options.indentUnit;
var container = this.container = document.body;
this.history = new UndoHistory(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 && !internetExplorer)
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() {
// Use contentEditable instead of designMode on IE, since designMode frames
// can not run any scripts. It would be nice if we could use contentEditable
// everywhere, but it is significantly flakier than designMode on every
// single non-IE browser.
if (document.body.contentEditable != undefined && internetExplorer)
document.body.contentEditable = "true";
else
document.designMode = "on";
// Work around issue where you have to click on the actual
// body of the document to focus it in IE, making focusing
// hard when the document is small.
if (internetExplorer && options.height != "dynamic")
document.body.style.minHeight = (
window.frameElement.clientHeight - 2 * document.body.offsetTop - 5) + "px";
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(internetExplorer ? document.body : window, "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(window, "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) {
var lines = asEditorLines(code), chunk = 1000;
if (!this.options.incrementalLoading || lines.length < chunk) {
this.history.push(null, null, lines);
this.history.reset();
}
else {
var cur = 0, self = this;
function addChunk() {
var chunklines = lines.slice(cur, cur + chunk);
chunklines.push("");
self.history.push(self.history.nodeBefore(null), null, chunklines);
self.history.reset();
cur += chunk;
if (cur < lines.length)
parent.setTimeout(addChunk, 1000);
}
addChunk();
}
},
// Extract the code from the editor.
getCode: function() {
if (!this.container.firstChild)
return "";
var accum = [];
select.markSelection();
forEach(traverseDOM(this.container.firstChild), method(accum, "push"));
select.selectMarked();
// On webkit, don't count last (empty) line if the webkitLastLineHack BR is present
if (webkit && this.container.lastChild.hackBR)
accum.pop();
webkitLastLineHack(this.container);
return cleanText(accum.join(""));
},
checkLine: function(node) {
if (node === false || !(node == null || node.parentNode == this.container || node.hackBR))
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() {
var last = this.container.lastChild;
if (last) last = startOfLine(last);
if (last && last.hackBR) last = startOfLine(last.previousSibling);
return last;
},
nextLine: function(line) {
this.checkLine(line);
var end = endOfLine(line, this.container);
if (!end || end.hackBR) return false;
else return end;
},
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);
for (var i = 0; i < lines.length; i++) {
if (i > 0) this.container.insertBefore(document.createElement("BR"), before);
this.container.insertBefore(makePartSpan(lines[i]), 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);
},
cursorCoords: function(start, internal) {
var sel = select.cursorPos(this.container, start);
if (!sel) return null;
var off = sel.offset, node = sel.node, self = this;
function measureFromNode(node, xOffset) {
var y = -(document.body.scrollTop || document.documentElement.scrollTop || 0),
x = -(document.body.scrollLeft || document.documentElement.scrollLeft || 0) + xOffset;
forEach([node, internal ? null : window.frameElement], function(n) {
while (n) {x += n.offsetLeft; y += n.offsetTop;n = n.offsetParent;}
});
return {x: x, y: y, yBot: y + node.offsetHeight};
}
function withTempNode(text, f) {
var node = document.createElement("SPAN");
node.appendChild(document.createTextNode(text));
try {return f(node);}
finally {if (node.parentNode) node.parentNode.removeChild(node);}
}
while (off) {
node = node ? node.nextSibling : this.container.firstChild;
var txt = nodeText(node);
if (off < txt.length)
return withTempNode(txt.substr(0, off), function(tmp) {
tmp.style.position = "absolute"; tmp.style.visibility = "hidden";
tmp.className = node.className;
self.container.appendChild(tmp);
return measureFromNode(node, tmp.offsetWidth);
});
off -= txt.length;
}
if (node && isSpan(node))
return measureFromNode(node, node.offsetWidth);
else if (node && node.nextSibling && isSpan(node.nextSibling))
return measureFromNode(node.nextSibling, 0);
else
return withTempNode("\u200b", function(tmp) {
if (node) node.parentNode.insertBefore(tmp, node.nextSibling);
else self.container.insertBefore(tmp, self.container.firstChild);
return measureFromNode(tmp, 0);
});
},
reroutePasteEvent: function() {
if (this.capturingPaste || window.opera || (gecko && gecko >= 20101026)) return;
this.capturingPaste = true;
var te = window.frameElement.CodeMirror.textareaHack;
var coords = this.cursorCoords(true, true);
te.style.top = coords.y + "px";
if (internetExplorer) {
var snapshot = select.getBookmark(this.container);
if (snapshot) this.selectionSnapshot = snapshot;
}
parent.focus();
te.value = "";
te.focus();
var self = this;
parent.setTimeout(function() {
self.capturingPaste = false;
window.focus();
if (self.selectionSnapshot) // IE hack
window.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.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, true);
}
},
grabKeys: function(eventHandler, filter) {
this.frozen = eventHandler;
this.keyFilter = filter;
},
ungrabKeys: function() {
this.frozen = "leave";
},
setParser: function(name, parserConfig) {
Editor.Parser = window[name];
parserConfig = parserConfig || this.options.parserConfig;
if (parserConfig && Editor.Parser.configure)
Editor.Parser.configure(parserConfig);
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; this.keyFilter = 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();
var mode = this.options.enterMode;
if (mode != "flat") this.indentAtCursor(mode == "keep" ? "keep" : undefined);
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 (code == 86 && !mac) { // V
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 = this.options.electricChars && 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.code, event))) ||
event.code == 13 || (event.code == 9 && this.options.tabMode != "default") ||
(event.code == 32 && event.shiftKey && this.options.tabMode == "default"))
event.stop();
else if (mac && (event.ctrlKey || event.metaKey) && event.character == "v") {
this.reroutePasteEvent();
}
else if (electric && electric.indexOf(event.character) != -1)
parent.setTimeout(function(){self.indentAtCursor(null);}, 0);
// Work around a bug where pressing backspace at the end of a
// line, or delete at the start, often causes the cursor to jump
// to the start of the line in Opera 10.60.
else if (brokenOpera) {
if (event.code == 8) { // backspace
var sel = select.selectionTopNode(this.container), self = this,
next = sel ? sel.nextSibling : this.container.firstChild;
if (sel !== false && next && isBR(next))
parent.setTimeout(function(){
if (select.selectionTopNode(self.container) == next)
select.focusAfterNode(next.previousSibling, self.container);
}, 20);
}
else if (event.code == 46) { // delete
var sel = select.selectionTopNode(this.container), self = this;
if (sel && isBR(sel)) {
parent.setTimeout(function(){
if (select.selectionTopNode(self.container) != sel)
select.focusAfterNode(sel, self.container);
}, 20);
}
}
}
// In 533.* WebKit versions, when the document is big, typing
// something at the end of a line causes the browser to do some
// kind of stupid heavy operation, creating delays of several
// seconds before the typed characters appear. This very crude
// hack inserts a temporary zero-width space after the cursor to
// make it not be at the end of the line.
else if (slowWebkit) {
var sel = select.selectionTopNode(this.container),
next = sel ? sel.nextSibling : this.container.firstChild;
// Doesn't work on empty lines, for some reason those always
// trigger the delay.
if (sel && next && isBR(next) && !isBR(sel)) {
var cheat = document.createTextNode("\u200b");
this.container.insertBefore(cheat, next);
parent.setTimeout(function() {
if (cheat.nodeValue == "\u200b") removeElement(cheat);
else cheat.nodeValue = cheat.nodeValue.replace("\u200b", "");
}, 20);
}
}
// Magic incantation that works abound a webkit bug when you
// can't type on a blank line following a line that's wider than
// the window.
if (webkit && !this.options.textWrapping)
setTimeout(function () {
var node = select.selectionTopNode(self.container, true);
if (node && node.nodeType == 3 && node.previousSibling && isBR(node.previousSibling)
&& node.nextSibling && isBR(node.nextSibling))
node.parentNode.replaceChild(document.createElement("BR"), node.previousSibling);
}, 50);
},
// 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) {
function whiteSpaceAfter(node) {
var ws = node ? node.nextSibling : self.container.firstChild;
if (!ws || !hasClass(ws, "whitespace")) return null;
return ws;
}
// whiteSpace is the whitespace span at the start of the line,
// or null if there is no such node.
var self = this, whiteSpace = whiteSpaceAfter(start);
var newIndent = 0, curIndent = whiteSpace ? whiteSpace.currentText.length : 0;
var firstText = whiteSpace ? whiteSpace.nextSibling : (start ? start.nextSibling : this.container.firstChild);
if (direction == "keep") {
if (start) {
var prevWS = whiteSpaceAfter(startOfLine(start.previousSibling))
if (prevWS) newIndent = prevWS.currentText.length;
}
}
else {
// Sometimes the start of the line can influence the correct
// indentation, so we retrieve it.
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.
if (direction != null && this.options.tabMode != "indent")
newIndent = direction ? curIndent + indentUnit : Math.max(0, curIndent - indentUnit)
else if (start)
newIndent = start.indentation(nextChars, curIndent, direction, firstText);
else if (Editor.Parser.firstIndentation)
newIndent = Editor.Parser.firstIndentation(nextChars, curIndent, direction, firstText);
}
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 || firstText, 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;
select.snapshotMove(whiteSpace.firstChild, whiteSpace.firstChild, indentDiff, true);
}
// Otherwise, we have to add a new whitespace node.
else {
whiteSpace = makePartSpan(makeWhiteSpace(newIndent));
whiteSpace.className = "whitespace";
if (start) insertAfter(whiteSpace, start);
else this.container.insertBefore(whiteSpace, this.container.firstChild);
select.snapshotMove(firstText && (firstText.firstChild || firstText),
whiteSpace.firstChild, newIndent, false, true);
}
}
// Make sure cursor ends up after the whitespace
else if (whiteSpace) {
select.snapshotMove(whiteSpace.firstChild, whiteSpace.firstChild, newIndent, false);
}
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();
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.somethingSelected())
select.insertTabAtCursor();
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) parent.clearTimeout(this.parenEvent);
var self = this;
this.parenEvent = 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, mark = this.options.markParen;
if (typeof mark == "string") mark = [mark, mark];
// give the relevant nodes a colour.
function highlight(node, ok) {
if (!node) return;
if (!mark) {
node.style.fontWeight = "bold";
node.style.color = ok ? "#8F8" : "#F88";
}
else if (mark.call) mark(node, ok);
else node.className += " " + mark[ok ? 0 : 1];
}
function unhighlight(node) {
if (!node) return;
if (mark && !mark.call)
removeClass(removeClass(node, mark[0]), mark[1]);
else 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 || !window.parent || !window.select) return;
// Clear the event property.
if (this.parenEvent) 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)
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.indentLineAfter(startOfLine(cursor), direction);
select.selectMarked();
},
// Indent all lines whose start falls inside of the current
// selection.
indentRegion: function(start, end, direction, selectAfter) {
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);
if (selectAfter)
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) {
window.document.designMode = "off";
window.document.designMode = "on";
this.unloaded = false;
}
if (internetExplorer) {
this.container.createTextRange().execCommand("unlink");
clearTimeout(this.saveSelectionSnapshot);
var self = this;
this.saveSelectionSnapshot = setTimeout(function() {
var snapshot = select.getBookmark(self.container);
if (snapshot) self.selectionSnapshot = snapshot;
}, 200);
}
var activity = this.options.onCursorActivity;
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;
parent.clearTimeout(this.highlightTimeout);
this.highlightTimeout = 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 || !window.parent || !window.select) return false;
if (!this.options.readOnly) select.markSelection();
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.nextSibling);
}
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 || !window.parent || !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();
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) {
parent.clearTimeout(this.documentScan);
this.documentScan = 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);
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 || alwaysZero;
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)){
if (active && part.dirty) active(part, token, self);
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);
parent.setTimeout(method(CodeMirror, "init"), 0);
});
// A framework for simple tokenizers. Takes care of newlines and
// white-space, and of getting the text from the source stream into
// the token object. A state is a function of two arguments -- a
// string stream and a setState function. The second can be used to
// change the tokenizer's state, and can be ignored for stateless
// tokenizers. This function should advance the stream over a token
// and return a string or object containing information about the next
// token, or null to pass and have the (new) state be called to finish
// the token. When a string is given, it is wrapped in a {style, type}
// object. In the resulting object, the characters consumed are stored
// under the content property. Any whitespace following them is also
// automatically consumed, and added to the value property. (Thus,
// content is the actual meaningful part of the token, while value
// contains all the text it spans.)
function tokenizer(source, state) {
// Newlines are always a separate token.
function isWhiteSpace(ch) {
// The messy regexp is because IE's regexp matcher is of the
// opinion that non-breaking spaces are no whitespace.
return ch != "\n" && /^[\s\u00a0]*$/.test(ch);
}
var tokenizer = {
state: state,
take: function(type) {
if (typeof(type) == "string")
type = {style: type, type: type};
type.content = (type.content || "") + source.get();
if (!/\n$/.test(type.content))
source.nextWhile(isWhiteSpace);
type.value = type.content + source.get();
return type;
},
next: function () {
if (!source.more()) throw StopIteration;
var type;
if (source.equals("\n")) {
source.next();
return this.take("whitespace");
}
if (source.applies(isWhiteSpace))
type = "whitespace";
else
while (!type)
type = this.state(source, function(s) {tokenizer.state = s;});
return this.take(type);
}
};
return tokenizer;
}