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/* * 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; //skip added node in parent } } else if ((node.nodeType === 1 && node.childNodes) && // only element nodes that have children !/(script|style)/i.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], 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); }); }; |