//WARNING ! This version have been modified for RTE SWI project.
// Changes : 
//     - Added "firstOccurenceOnly": as a way to limit the number of hilighted occurences of the same string.
//     - Added "ignoreNodes": as a way avoid highlighting on specific nodes (like <a/> or <title/>, etc...)

/*
 * jQuery Highlight plugin 
 *
 * Based on highlight v3 by Johann Burkard
 * http://johannburkard.de/blog/programming/javascript/highlight-javascript-text-higlighting-jquery-plugin.html
 *
 * Code a little bit refactored and cleaned (in my humble opinion).
 * Most important changes:
 *  - has an option to highlight only entire words (wordsOnly - false by default),
 *  - has an option to be case sensitive (caseSensitive - false by default)
 *  - highlight element tag and class names can be specified in options
 *
 * Usage:
 *   // wrap every occurrance of text 'lorem' in content
 *   // with <span class='highlight'> (default options)
 *   $('#content').highlight('lorem');
 *
 *   // search for and highlight more terms at once
 *   // so you can save some time on traversing DOM
 *   $('#content').highlight(['lorem', 'ipsum']);
 *   $('#content').highlight('lorem ipsum');
 *
 *   // search only for entire word 'lorem'
 *   $('#content').highlight('lorem', { wordsOnly: true });
 *
 *   // don't ignore case during search of term 'lorem'
 *   $('#content').highlight('lorem', { caseSensitive: true });
 *
 *   // wrap every occurrance of term 'ipsum' in content
 *   // with <em class='important'>
 *   $('#content').highlight('ipsum', { element: 'em', className: 'important' });
 *
 *   // remove default highlight
 *   $('#content').unhighlight();
 *
 *   // remove custom highlight
 *   $('#content').unhighlight({ element: 'em', className: 'important' });
 *
 *
 * Copyright (c) 2009 Bartek Szopka
 *
 * Licensed under MIT license.
 *
 */

jQuery.extend({
	highlightRegExp: new RegExp(),
    highlight: function (node, nodeName, className, firstOccurenceOnly, inre) {
        if (node.nodeType === 3) {
			var match = node.data.match(jQuery.highlightRegExp);
            if (match) {
                var highlight = document.createElement(nodeName || 'span');
                highlight.className = className || 'highlight';
                var wordNode = node.splitText(match.index);
                wordNode.splitText(match[0].length);
				var wordClone = wordNode.cloneNode(true);
                highlight.appendChild(wordClone);
                wordNode.parentNode.replaceChild(highlight, wordNode);
                if (firstOccurenceOnly){
					//delete the word from regexp
					
					var flag, pattern;
					flag= jQuery.highlightRegExp.ignoreCase ? "i" : "";
					var regExpSource = new String(jQuery.highlightRegExp.source);
					if (jQuery.highlightRegExp.ignoreCase){
						pattern = regExpSource.toLowerCase().replace('|'+wordNode.nodeValue.toLowerCase()+'|','|');
					} else{
						pattern = regExpSource.replace('|'+wordNode.nodeValue+'|','|');
					}
					jQuery.highlightRegExp = new RegExp(pattern, flag);
				}
				
				return 1; //skip added node in parent
            }
        } else if ((node.nodeType === 1 && node.childNodes) && // only element nodes that have children
                !inre.test(node.tagName) && // ignore script and style nodes
                !(node.tagName === nodeName.toUpperCase() && node.className === className)) { // skip if already highlighted
            for (var i = 0; i < node.childNodes.length; i++) {
                i += jQuery.highlight(node.childNodes[i], nodeName, className, firstOccurenceOnly, inre);
            }
        }
        return 0;
    }
});

jQuery.fn.unhighlight = function (options) {
    var settings = { className: 'highlight', element: 'span'};
    jQuery.extend(settings, options);

    return this.find(settings.element + "." + settings.className).each(function () {
        var parent = this.parentNode;
        parent.replaceChild(this.firstChild, this);
        parent.normalize();
    }).end();
};

jQuery.fn.highlight = function (words, options) {
    var settings = { className: 'highlight', element: 'span', caseSensitive: false, wordsOnly: false, firstOccurenceOnly: false, ignoreNodes: new Array()};
    jQuery.extend(settings, options);
	settings.ignoreNodes.push('script','style');
    
    if (words.constructor === String) {
        words = [words];
    }
    words = jQuery.grep(words, function(word, i){
      return word != '';
    });
    if (words.length == 0) { return this; };

    var flag = settings.caseSensitive ? "" : "i";
	var pattern = words.join("|");
	
	// Escape all parenthesis char from the pattern 
	pattern = pattern.replace(new RegExp('\\(', 'g'),'\\(');
    pattern = pattern.replace(new RegExp('\\)', 'g'),'\\)');
    pattern = "(" + pattern + ")";
    if (settings.wordsOnly) {
        pattern = "\\b" + pattern + "\\b";
    }
    var re = new RegExp(pattern, flag);
	jQuery.highlightRegExp = re; // /\b(système \(électrique\)|RTE)\b/i;
	
	pattern = "(" + settings.ignoreNodes.join("|") + ")";
    var inre = new RegExp(pattern, "i");
	return this.each(function () {
        jQuery.highlight(this, settings.element, settings.className, settings.firstOccurenceOnly,inre);
    });
};