https://content.behrs-online.de/wissen/js/jquery.highlight-6ff7fa08938e86a93c23ff43983fc7d8.js

1/*
2 * jQuery Highlight plugin
3 *
4 * Based on highlight v3 by Johann Burkard
5 * http://johannburkard.de/blog/programming/javascript/highlight-javascript-text-higlighting-jquery-plugin.html
6 *
7 * Code a little bit refactored and cleaned (in my humble opinion).
8 * Most important changes:
9 *  - has an option to highlight only entire words (wordsOnly - false by default),
10 *  - has an option to be case sensitive (caseSensitive - false by default)
11 *  - highlight element tag and class names can be specified in options
12 *
13 * Usage:
14 *   // wrap every occurrance of text 'lorem' in content
15 *   // with <span class='highlight'> (default options)
16 *   $('#content').highlight('lorem');
17 *
18 *   // search for and highlight more terms at once
19 *   // so you can save some time on traversing DOM
20 *   $('#content').highlight(['lorem', 'ipsum']);
21 *   $('#content').highlight('lorem ipsum');
22 *
23 *   // search only for entire word 'lorem'
24 *   $('#content').highlight('lorem', { wordsOnly: true });
25 *
26 *   // don't ignore case during search of term 'lorem'
27 *   $('#content').highlight('lorem', { caseSensitive: true });
28 *
29 *   // wrap every occurrance of term 'ipsum' in content
30 *   // with <em class='important'>
31 *   $('#content').highlight('ipsum', { element: 'em', className: 'important' });
32 *
33 *   // remove default highlight
34 *   $('#content').unhighlight();
35 *
36 *   // remove custom highlight
37 *   $('#content').unhighlight({ element: 'em', className: 'important' });
38 *
39 *
40 * Copyright (c) 2009 Bartek Szopka
41 *
42 * Licensed under MIT license.
43 *
44 */
45
46var nrItemsHighlighted = 0;
47jQuery.extend({
48    highlight: function (node, re, nodeName, className, ie11, highlightStatus) {
49        var exit = false;
50        if (!exit && !highlightStatus) {
51            exit = (nrItemsHighlighted > 0);
52        }
53        if (node.nodeType === 3 && !exit) {
54            var match = node.data.match(re);
55            if (match) {
56                var highlight = document.createElement(nodeName || 'span');
57                highlight.className = className || 'highlight-doc';
58                var wordNode = node.splitText(match.index);
59                wordNode.splitText(match[0].length);
60                var wordClone = wordNode.cloneNode(true);
61                highlight.appendChild(wordClone);
62                wordNode.parentNode.replaceChild(highlight, wordNode);
63                nrItemsHighlighted++;
64                return 1; //skip added node in parent
65            }
66        } else if ((node.nodeType === 1 && node.childNodes) && // only element nodes that have children
67                !/(script|style)/i.test(node.tagName) && // ignore script and style nodes
68                !(node.tagName === nodeName.toUpperCase() && node.className === className) && !exit) { // skip if already highlighted
69            for (var i = 0; i < node.childNodes.length; i++) {
70                i += jQuery.highlight(node.childNodes[i], re, nodeName, className, ie11, highlightStatus);
71            }
72        }
73        return 0;
74    }
75});
76
77jQuery.fn.unhighlight = function (options) {
78    var settings = { className: 'highlight-doc', element: 'span' };
79    jQuery.extend(settings, options);
80
81    return this.find(settings.element + "." + settings.className).each(function () {
82        var parent = this.parentNode;
83        parent.replaceChild(this.firstChild, this);
84        parent.normalize();
85    }).end();
86};
87
88jQuery.fn.highlight = function (highlightStatus, words, options) {
89    var settings = { className: 'highlight-doc', element: 'span', caseSensitive: false, wordsOnly: false };
90    jQuery.extend(settings, options);
91
92    if (words.constructor === String) {
93        words = [words];
94    }
95    words = jQuery.grep(words, function(word, i){
96      return word != '';
97    });
98    words = jQuery.map(words, function(word, i) {
99      return word.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&");
100    });
101    if (words.length == 0) { return this; };
102
103    var flag = settings.caseSensitive ? "" : "i";
104    var pattern = "(" + words.join("|") + ")";
105    if (settings.wordsOnly) {
106        pattern = "\\b" + pattern + "\\b";
107    }
108    var re = new RegExp(pattern, flag);
109
110    var ie11 = (navigator.userAgent.toLowerCase().indexOf("like gecko") > -1 && navigator.userAgent.toLowerCase().indexOf("11.") > -1);
111    nrItemsHighlighted = 0;
112    return this.each(function () {
113        jQuery.highlight(this, re, settings.element, settings.className, ie11, highlightStatus

113);
114    });
115};