chamilo-lms2/main/inc/lib/javascript/jquery.highlight.js

/*
highlight v3

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>
Julio Montoya <gugli100@gmail.com> fixes for the Glossary tool to strict search 

*/

jQuery.fn.highlight = function(pat,real_code) {
	
	function innerHighlight(node, pat) {
		var skip = 0; 
		if (node.nodeType == 3 ) {
			// Highlight all coincidences
			//var pos = node.data.toUpperCase().indexOf(pat);
			
			//Highlight strict, exact words
			var SearchRegExp = new RegExp("(\\b)"+pat+"(\\b)","gi");
			var pos = node.nodeValue.search(SearchRegExp);
			
			if (pos >= 0 ) {
				var spannode = document.createElement('a');
				spannode.className = 'glossary-ajax';			
				spannode.style.color = '#084B8A';
				spannode.style.fontWeight='100';
				spannode.style.textDecoration = 'none';
				spannode.name = 'link'+real_code;
				spannode.href = '#';
				var SearchRegExp = new RegExp("(" + pat +")","gi");
				var MatchRegExp = node.nodeValue.match(SearchRegExp);
				if (MatchRegExp == null) {
					MatchRegExp = new Array();
				}
			
				if (MatchRegExp.length > 0 && node.nodeValue[pat.length+1] != '') {
					var middlebit = node.splitText(pos);
					var endbit = middlebit.splitText(pat.length);
					if (endbit.nodeValue[0] == null || endbit.nodeValue[0] == ' ' || endbit.nodeValue[0] == '.' || endbit.nodeValue[0] == ',' || endbit.nodeValue[0] == ';' || endbit.nodeValue[0] == '"') {
						var 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 += innerHighlight(node.childNodes[i], pat);					
		   	}
		}
	  return skip;
	}		
	
	return this.each(function() {
		innerHighlight(this, pat.toUpperCase());	
	});
	
};
	
jQuery.fn.removeHighlight = function() {
	return this.find("a.highlight").each(function() {
		this.parentNode.firstChild.nodeName;
		with (this.parentNode) {
	   		replaceChild(this.firstChild, this);
	   		normalize();
	  	}
	}).end();

};