/*

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>

*** NOTE ***
* THIS HAS BEEN MODIFIED FROM THE V3 CODE TO SUPPORT SIMPLE GLOB STYLE PATTERN MATCHES
* DO NOT UPDATE BEYOND V3 WITHOUT TAKING THIS INTO CONSIDERATION.
************

*/

jQuery.fn.highlight = function(pat) {
 function innerHighlight(node, pat) {
  var skip = 0;
  if (node.nodeType == 3) {
   var matches = node.data.match(pat);
   if ( matches != null && matches.length > 0 ) {
     var pos = node.data.indexOf(matches[0]);
     if (pos >= 0) {
      var spannode = document.createElement('span');
      spannode.className = 'highlight';
      var middlebit = node.splitText(pos);
      var endbit = middlebit.splitText(matches[0].length);
      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() {
	 if ( typeof(pat) == 'string' ) {
		 if ( pat == '*' ) {
			 // Don't highlight everything :(
			 return;
		 }
         var patStr = "\\b" + pat.replace(/\[/g,'\\[')
         		 .replace(/\$/g,'\\$')
         		 .replace(/\^/g,'\\^')
                 .replace(/\]/g,'\\]')
                 .replace(/\./g,'\\.')
                 .replace(/\+/g,'\\+')
                 .replace(/\-/g,'\\-')
                 .replace(/\*/g,'[^ ]*')
                 .replace(/\|/g,'\\|')
                 .replace(/\?/g,'[^ ]') + "\\b";
      pat = new RegExp(patStr,'ig');
  }
  innerHighlight(this, pat);
 });
};

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