/*
 * 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({highlight:function(node,re,nodeName,className){if(node.nodeType===3){var match=node.data.match(re);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);return 1}}else if((node.nodeType===1&&node.childNodes)&&!/(script|style)/i.test(node.tagName)&&!(node.tagName===nodeName.toUpperCase()&&node.className===className)){for(var i=0;i<node.childNodes.length;i++){i+=jQuery.highlight(node.childNodes[i],re,nodeName,className)}}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};jQuery.extend(settings,options);if(words.constructor===String){words=[words]}words=jQuery.grep(words,function(word,i){return word!=''});words=jQuery.map(words,function(word,i){return word.replace(/[-[\]{}()*+?.,\\^$|#\s]/g,"\\$&")});if(words.length==0){return this};var flag=settings.caseSensitive?"":"i";var pattern="("+words.join("|")+")";if(settings.wordsOnly){pattern="\\b"+pattern+"\\b"}var re=new RegExp(pattern,flag);return this.each(function(){jQuery.highlight(this,re,settings.element,settings.className)})};