js2/mwEmbed/jquery/plugins/jquery.highlight.js

   1 /*
   2 highlight v1
   3
   4 Highlights arbitrary terms.
   5 <http://johannburkard.de/blog/programming/javascript/highlight-javascript-text-higlighting-jquery-plugin.html>
   6 MIT license.
   7
   8 Johann Burkard
   9 <http://johannburkard.de>
  10 <mailto:jb@eaio.com>
  11 */
  12 $(function() {
  13  jQuery.highlight = document.body.createTextRange ?
  14
  15 /*
  16 Version for IE using TextRanges.
  17 */
  18   function(node, te) {
  19    var r = document.body.createTextRange();
  20    r.moveToElementText(node);
  21    for (var i = 0; r.findText(te); i++) {
  22     r.pasteHTML('<span class="highlight">' +  r.text + '<\/span>');
  23     r.collapse(false);
  24    }
  25   }
  26
  27  :
  28
  29 /*
  30  (Complicated) version for Mozilla and Opera using span tags.
  31 */
  32   function(node, te) {
  33    var pos, skip, spannode, middlebit, endbit, middleclone;
  34    skip = 0;
  35    if (node.nodeType == 3) {
  36     pos = node.data.toUpperCase().indexOf(te);
  37     if (pos >= 0) {
  38      spannode = document.createElement('span');
  39      spannode.className = 'highlight';
  40      middlebit = node.splitText(pos);
  41      endbit = middlebit.splitText(te.length);
  42      middleclone = middlebit.cloneNode(true);
  43      spannode.appendChild(middleclone);
  44      middlebit.parentNode.replaceChild(spannode, middlebit);
  45      skip = 1;
  46     }
  47    }
  48    else if (node.nodeType == 1 && node.childNodes && !/(script|style)/i.test(node.tagName)) {
  49     for (var i = 0; i < node.childNodes.length; ++i) {
  50      i += $.highlight(node.childNodes[i], te);
  51     }
  52    }
  53    return skip;
  54   }
  55
  56  ;
  57 });
  58
  59 jQuery.fn.removeHighlight = function() {
  60  return this.find("span.highlight").each(function() {
  61   this.parentNode.replaceChild(this.firstChild, this).normalize();
  62  });
  63 };