/*
 * 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 only (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];
    }

    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);
    });
};
*/

/*

highlight v1

Highlights arbitrary terms.

<http://johannburkard.de/blog/programming/javascript/highlight-javascript-text-higlighting-jquery-plugin.html>

MIT license.

Johann Burkard
<http://johannburkard.de>
<mailto:jb@eaio.com>

*/

$(function() {
 jQuery.highlight = document.body.createTextRange ?

/*
Version for IE using TextRanges.
*/
  function(node, te) {
   var r = document.body.createTextRange();
   r.moveToElementText(node);
   for (var i = 0; r.findText(te); i++) {
    r.pasteHTML('<span class="highlight">' +  r.text + '<\/span>');
    r.collapse(false);
   }
  }

 :

/*
 (Complicated) version for Mozilla and Opera using span tags.
*/
  function(node, te) {
   var pos, skip, spannode, middlebit, endbit, middleclone;
   skip = 0;
   if (node.nodeType == 3) {
    pos = node.data.toUpperCase().indexOf(te);
    if (pos >= 0) {
     spannode = document.createElement('span');
     spannode.className = 'highlight';
     middlebit = node.splitText(pos);
     endbit = middlebit.splitText(te.length);
     middleclone = middlebit.cloneNode(true);
     spannode.appendChild(middleclone);
     middlebit.parentNode.replaceChild(spannode, middlebit);
     skip = 1;
    }
   }
   else if (node.nodeType == 1 && node.childNodes && !/(script|style)/i.test(node.tagName)) {
    for (var i = 0; i < node.childNodes.length; ++i) {
     i += jQuery.highlight(node.childNodes[i], te);
    }
   }
   return skip;
  }

 ;
});

jQuery.fn.removeHighlight = function() {
 return this.find("span.highlight").each(function() {
  this.parentNode.replaceChild(this.firstChild, this).normalize();
 });
};