109 lines
3.9 KiB
JavaScript
109 lines
3.9 KiB
JavaScript
/*
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* jQuery Highlight plugin
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*
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* Based on highlight v3 by Johann Burkard
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* http://johannburkard.de/blog/programming/javascript/highlight-javascript-text-higlighting-jquery-plugin.html
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*
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* Code a little bit refactored and cleaned (in my humble opinion).
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* Most important changes:
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* - has an option to highlight only entire words (wordsOnly - false by default),
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* - has an option to be case sensitive (caseSensitive - false by default)
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* - highlight element tag and class names can be specified in options
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*
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* Usage:
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* // wrap every occurrance of text 'lorem' in content
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* // with <span class='highlight'> (default options)
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* $('#content').highlight('lorem');
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*
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* // search for and highlight more terms at once
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* // so you can save some time on traversing DOM
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* $('#content').highlight(['lorem', 'ipsum']);
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* $('#content').highlight('lorem ipsum');
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*
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* // search only for entire word 'lorem'
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* $('#content').highlight('lorem', { wordsOnly: true });
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*
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* // don't ignore case during search of term 'lorem'
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* $('#content').highlight('lorem', { caseSensitive: true });
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*
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* // wrap every occurrance of term 'ipsum' in content
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* // with <em class='important'>
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* $('#content').highlight('ipsum', { element: 'em', className: 'important' });
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*
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* // remove default highlight
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* $('#content').unhighlight();
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*
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* // remove custom highlight
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* $('#content').unhighlight({ element: 'em', className: 'important' });
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*
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*
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* Copyright (c) 2009 Bartek Szopka
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*
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* Licensed under MIT license.
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*
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*/
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jQuery.extend({
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highlight: function (node, re, nodeName, className) {
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if (node.nodeType === 3) {
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var match = node.data.match(re);
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if (match) {
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var highlight = document.createElement(nodeName || 'span');
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highlight.className = className || 'highlight';
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var wordNode = node.splitText(match.index);
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wordNode.splitText(match[0].length);
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var wordClone = wordNode.cloneNode(true);
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highlight.appendChild(wordClone);
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wordNode.parentNode.replaceChild(highlight, wordNode);
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return 1; //skip added node in parent
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}
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} else if ((node.nodeType === 1 && node.childNodes) && // only element nodes that have children
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!/(script|style)/i.test(node.tagName) && // ignore script and style nodes
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!(node.tagName === nodeName.toUpperCase() && node.className === className)) { // skip if already highlighted
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for (var i = 0; i < node.childNodes.length; i++) {
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i += jQuery.highlight(node.childNodes[i], re, nodeName, className);
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}
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}
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return 0;
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}
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});
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jQuery.fn.unhighlight = function (options) {
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var settings = { className: 'highlight', element: 'span' };
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jQuery.extend(settings, options);
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return this.find(settings.element + "." + settings.className).each(function () {
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var parent = this.parentNode;
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parent.replaceChild(this.firstChild, this);
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parent.normalize();
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}).end();
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};
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jQuery.fn.highlight = function (words, options) {
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var settings = { className: 'highlight', element: 'span', caseSensitive: false, wordsOnly: false };
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jQuery.extend(settings, options);
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if (words.constructor === String) {
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words = [words];
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}
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words = jQuery.grep(words, function(word, i){
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return word != '';
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});
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words = jQuery.map(words, function(word, i) {
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return word.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&");
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});
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if (words.length == 0) { return this; };
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var flag = settings.caseSensitive ? "" : "i";
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var pattern = "(" + words.join("|") + ")";
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if (settings.wordsOnly) {
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pattern = "\\b" + pattern + "\\b";
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}
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var re = new RegExp(pattern, flag);
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return this.each(function () {
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jQuery.highlight(this, re, settings.element, settings.className);
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});
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};
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