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/**
* DomTextMatcher.js
*
* Copyright, Moxiecode Systems AB
* Released under LGPL License.
*
* License: http://www.tinymce.com/license
* Contributing: http://www.tinymce.com/contributing
*/
/*eslint no-labels:0, no-constant-condition: 0 */
/**
* This class logic for filtering text and matching words.
*
* @class tinymce.spellcheckerplugin.TextFilter
* @private
*/
define("tinymce/spellcheckerplugin/DomTextMatcher", [], function() {
// Based on work developed by: James Padolsey http://james.padolsey.com
// released under UNLICENSE that is compatible with LGPL
// TODO: Handle contentEditable edgecase:
// <p>text<span contentEditable="false">text<span contentEditable="true">text</span>text</span>text</p>
return function(node, editor) {
var m, matches = [], text, dom = editor.dom;
var blockElementsMap, hiddenTextElementsMap, shortEndedElementsMap;
blockElementsMap = editor.schema.getBlockElements(); // H1-H6, P, TD etc
hiddenTextElementsMap = editor.schema.getWhiteSpaceElements(); // TEXTAREA, PRE, STYLE, SCRIPT
shortEndedElementsMap = editor.schema.getShortEndedElements(); // BR, IMG, INPUT
function createMatch(m, data) {
if (!m[0]) {
throw 'findAndReplaceDOMText cannot handle zero-length matches';
}
return {
start: m.index,
end: m.index + m[0].length,
text: m[0],
data: data
};
}
function getText(node) {
var txt;
if (node.nodeType === 3) {
return node.data;
}
if (hiddenTextElementsMap[node.nodeName] && !blockElementsMap[node.nodeName]) {
return '';
}
txt = '';
if (blockElementsMap[node.nodeName] || shortEndedElementsMap[node.nodeName]) {
txt += '\n';
}
if ((node = node.firstChild)) {
do {
txt += getText(node);
} while ((node = node.nextSibling));
}
return txt;
}
function stepThroughMatches(node, matches, replaceFn) {
var startNode, endNode, startNodeIndex,
endNodeIndex, innerNodes = [], atIndex = 0, curNode = node,
matchLocation, matchIndex = 0;
matches = matches.slice(0);
matches.sort(function(a, b) {
return a.start - b.start;
});
matchLocation = matches.shift();
out: while (true) {
if (blockElementsMap[curNode.nodeName] || shortEndedElementsMap[curNode.nodeName]) {
atIndex++;
}
if (curNode.nodeType === 3) {
if (!endNode && curNode.length + atIndex >= matchLocation.end) {
// We've found the ending
endNode = curNode;
endNodeIndex = matchLocation.end - atIndex;
} else if (startNode) {
// Intersecting node
innerNodes.push(curNode);
}
if (!startNode && curNode.length + atIndex > matchLocation.start) {
// We've found the match start
startNode = curNode;
startNodeIndex = matchLocation.start - atIndex;
}
atIndex += curNode.length;
}
if (startNode && endNode) {
curNode = replaceFn({
startNode: startNode,
startNodeIndex: startNodeIndex,
endNode: endNode,
endNodeIndex: endNodeIndex,
innerNodes: innerNodes,
match: matchLocation.text,
matchIndex: matchIndex
});
// replaceFn has to return the node that replaced the endNode
// and then we step back so we can continue from the end of the
// match:
atIndex -= (endNode.length - endNodeIndex);
startNode = null;
endNode = null;
innerNodes = [];
matchLocation = matches.shift();
matchIndex++;
if (!matchLocation) {
break; // no more matches
}
} else if ((!hiddenTextElementsMap[curNode.nodeName] || blockElementsMap[curNode.nodeName]) && curNode.firstChild) {
// Move down
curNode = curNode.firstChild;
continue;
} else if (curNode.nextSibling) {
// Move forward:
curNode = curNode.nextSibling;
continue;
}
// Move forward or up:
while (true) {
if (curNode.nextSibling) {
curNode = curNode.nextSibling;
break;
} else if (curNode.parentNode !== node) {
curNode = curNode.parentNode;
} else {
break out;
}
}
}
}
/**
* Generates the actual replaceFn which splits up text nodes
* and inserts the replacement element.
*/
function genReplacer(callback) {
function makeReplacementNode(fill, matchIndex) {
var match = matches[matchIndex];
if (!match.stencil) {
match.stencil = callback(match);
}
var clone = match.stencil.cloneNode(false);
clone.setAttribute('data-mce-index', matchIndex);
if (fill) {
clone.appendChild(dom.doc.createTextNode(fill));
}
return clone;
}
return function(range) {
var before, after, parentNode, startNode = range.startNode,
endNode = range.endNode, matchIndex = range.matchIndex,
doc = dom.doc;
if (startNode === endNode) {
var node = startNode;
parentNode = node.parentNode;
if (range.startNodeIndex > 0) {
// Add "before" text node (before the match)
before = doc.createTextNode(node.data.substring(0, range.startNodeIndex));
parentNode.insertBefore(before, node);
}
// Create the replacement node:
var el = makeReplacementNode(range.match, matchIndex);
parentNode.insertBefore(el, node);
if (range.endNodeIndex < node.length) {
// Add "after" text node (after the match)
after = doc.createTextNode(node.data.substring(range.endNodeIndex));
parentNode.insertBefore(after, node);
}
node.parentNode.removeChild(node);
return el;
} else {
// Replace startNode -> [innerNodes...] -> endNode (in that order)
before = doc.createTextNode(startNode.data.substring(0, range.startNodeIndex));
after = doc.createTextNode(endNode.data.substring(range.endNodeIndex));
var elA = makeReplacementNode(startNode.data.substring(range.startNodeIndex), matchIndex);
var innerEls = [];
for (var i = 0, l = range.innerNodes.length; i < l; ++i) {
var innerNode = range.innerNodes[i];
var innerEl = makeReplacementNode(innerNode.data, matchIndex);
innerNode.parentNode.replaceChild(innerEl, innerNode);
innerEls.push(innerEl);
}
var elB = makeReplacementNode(endNode.data.substring(0, range.endNodeIndex), matchIndex);
parentNode = startNode.parentNode;
parentNode.insertBefore(before, startNode);
parentNode.insertBefore(elA, startNode);
parentNode.removeChild(startNode);
parentNode = endNode.parentNode;
parentNode.insertBefore(elB, endNode);
parentNode.insertBefore(after, endNode);
parentNode.removeChild(endNode);
return elB;
}
};
}
function unwrapElement(element) {
var parentNode = element.parentNode;
parentNode.insertBefore(element.firstChild, element);
element.parentNode.removeChild(element);
}
function getWrappersByIndex(index) {
var elements = node.getElementsByTagName('*'), wrappers = [];
index = typeof(index) == "number" ? "" + index : null;
for (var i = 0; i < elements.length; i++) {
var element = elements[i], dataIndex = element.getAttribute('data-mce-index');
if (dataIndex !== null && dataIndex.length) {
if (dataIndex === index || index === null) {
wrappers.push(element);
}
}
}
return wrappers;
}
/**
* Returns the index of a specific match object or -1 if it isn't found.
*
* @param {Match} match Text match object.
* @return {Number} Index of match or -1 if it isn't found.
*/
function indexOf(match) {
var i = matches.length;
while (i--) {
if (matches[i] === match) {
return i;
}
}
return -1;
}
/**
* Filters the matches. If the callback returns true it stays if not it gets removed.
*
* @param {Function} callback Callback to execute for each match.
* @return {DomTextMatcher} Current DomTextMatcher instance.
*/
function filter(callback) {
var filteredMatches = [];
each(function(match, i) {
if (callback(match, i)) {
filteredMatches.push(match);
}
});
matches = filteredMatches;
/*jshint validthis:true*/
return this;
}
/**
* Executes the specified callback for each match.
*
* @param {Function} callback Callback to execute for each match.
* @return {DomTextMatcher} Current DomTextMatcher instance.
*/
function each(callback) {
for (var i = 0, l = matches.length; i < l; i++) {
if (callback(matches[i], i) === false) {
break;
}
}
/*jshint validthis:true*/
return this;
}
/**
* Wraps the current matches with nodes created by the specified callback.
* Multiple clones of these matches might occur on matches that are on multiple nodex.
*
* @param {Function} callback Callback to execute in order to create elements for matches.
* @return {DomTextMatcher} Current DomTextMatcher instance.
*/
function wrap(callback) {
if (matches.length) {
stepThroughMatches(node, matches, genReplacer(callback));
}
/*jshint validthis:true*/
return this;
}
/**
* Finds the specified regexp and adds them to the matches collection.
*
* @param {RegExp} regex Global regexp to search the current node by.
* @param {Object} [data] Optional custom data element for the match.
* @return {DomTextMatcher} Current DomTextMatcher instance.
*/
function find(regex, data) {
if (text && regex.global) {
while ((m = regex.exec(text))) {
matches.push(createMatch(m, data));
}
}
return this;
}
/**
* Unwraps the specified match object or all matches if unspecified.
*
* @param {Object} [match] Optional match object.
* @return {DomTextMatcher} Current DomTextMatcher instance.
*/
function unwrap(match) {
var i, elements = getWrappersByIndex(match ? indexOf(match) : null);
i = elements.length;
while (i--) {
unwrapElement(elements[i]);
}
return this;
}
/**
* Returns a match object by the specified DOM element.
*
* @param {DOMElement} element Element to return match object for.
* @return {Object} Match object for the specified element.
*/
function matchFromElement(element) {
return matches[element.getAttribute('data-mce-index')];
}
/**
* Returns a DOM element from the specified match element. This will be the first element if it's split
* on multiple nodes.
*
* @param {Object} match Match element to get first element of.
* @return {DOMElement} DOM element for the specified match object.
*/
function elementFromMatch(match) {
return getWrappersByIndex(indexOf(match))[0];
}
/**
* Adds match the specified range for example a grammar line.
*
* @param {Number} start Start offset.
* @param {Number} length Length of the text.
* @param {Object} data Custom data object for match.
* @return {DomTextMatcher} Current DomTextMatcher instance.
*/
function add(start, length, data) {
matches.push({
start: start,
end: start + length,
text: text.substr(start, length),
data: data
});
return this;
}
/**
* Returns a DOM range for the specified match.
*
* @param {Object} match Match object to get range for.
* @return {DOMRange} DOM Range for the specified match.
*/
function rangeFromMatch(match) {
var wrappers = getWrappersByIndex(indexOf(match));
var rng = editor.dom.createRng();
rng.setStartBefore(wrappers[0]);
rng.setEndAfter(wrappers[wrappers.length - 1]);
return rng;
}
/**
* Replaces the specified match with the specified text.
*
* @param {Object} match Match object to replace.
* @param {String} text Text to replace the match with.
* @return {DOMRange} DOM range produced after the replace.
*/
function replace(match, text) {
var rng = rangeFromMatch(match);
rng.deleteContents();
if (text.length > 0) {
rng.insertNode(editor.dom.doc.createTextNode(text));
}
return rng;
}
/**
* Resets the DomTextMatcher instance. This will remove any wrapped nodes and remove any matches.
*
* @return {[type]} [description]
*/
function reset() {
matches.splice(0, matches.length);
unwrap();
return this;
}
text = getText(node);
return {
text: text,
matches: matches,
each: each,
filter: filter,
reset: reset,
matchFromElement: matchFromElement,
elementFromMatch: elementFromMatch,
find: find,
add: add,
wrap: wrap,
unwrap: unwrap,
replace: replace,
rangeFromMatch: rangeFromMatch,
indexOf: indexOf
};
};
});