Blame Identity/Webenv/Trac/htdocs/js/trac.js

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// Used for dynamically updating the height of a textarea
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function resizeTextArea(id, rows) {
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  var textarea = document.getElementById(id);
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  if (!textarea || (typeof(textarea.rows) == "undefined")) return;
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  textarea.rows = rows;
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}
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// A better way than for example hardcoding foo.onload
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function addEvent(element, type, func){
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  if (element.addEventListener) {
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    element.addEventListener(type, func, false);
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    return true;
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  } else if (element.attachEvent) {
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    return element.attachEvent("on" + type, func);
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  }
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  return false;
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}
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// Convenience function for the nearest ancestor element with a specific tag
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// name
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function getAncestorByTagName(e, tagName) {
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  tagName = tagName.toLowerCase();
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  do {
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    e = e.parentNode;
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  } while ((e.nodeType == 1) && (e.tagName.toLowerCase() != tagName));
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  return (e.nodeType == 1) ? e : null;
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}
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// Adapted from http://www.kryogenix.org/code/browser/searchhi/
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function searchHighlight() {
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  if (!document.createElement) return;
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  var div = document.getElementById("searchable");
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  if (!div) return;
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  function getSearchWords(url) {
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    if (url.indexOf('?') == -1) return [];
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    var queryString = url.substr(url.indexOf('?') + 1);
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    var params = queryString.split('&';;
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    for (var p in params) {
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      var param = params[p].split('=');
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      if (param.length < 2) continue;
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      if (param[0] == 'q' || param[0] == 'p') { // q= for Google, p= for Yahoo
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        var query = decodeURIComponent(param[1].replace(/\+/g, ' '));
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        if (query[0] == '!') query = query.slice(1);
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        words = query.split(/(".*?")|('.*?')|(\s+)/);
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        var words2 = new Array();
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        for (var w in words) {
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          words[w] = words[w].replace(/^\s+$/, '');
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          if (words[w] != '') {
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            words2.push(words[w].replace(/^['"]/, '').replace(/['"]$/, ''));
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          }
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        }
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        return words2;
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      }
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    }
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    return [];
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  }
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  function highlightWord(node, word, searchwordindex) {
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    // If this node is a text node and contains the search word, highlight it by
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    // surrounding it with a span element
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    if (node.nodeType == 3) { // Node.TEXT_NODE
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      var pos = node.nodeValue.toLowerCase().indexOf(word.toLowerCase());
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      if (pos >= 0 && !/^searchword\d$/.test(node.parentNode.className)) {
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        var span = document.createElement("span");
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        span.className = "searchword" + (searchwordindex % 5);
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        span.appendChild(document.createTextNode(
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          node.nodeValue.substr(pos, word.length)));
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        node.parentNode.insertBefore(span, node.parentNode.insertBefore(
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          document.createTextNode(node.nodeValue.substr(pos + word.length)),
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            node.nextSibling));
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        node.nodeValue = node.nodeValue.substr(0, pos);
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        return true;
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      }
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    } else if (!node.nodeName.match(/button|select|textarea/i)) {
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      // Recurse into child nodes
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      for (var i = 0; i < node.childNodes.length; i++) {
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        if (highlightWord(node.childNodes[i], word, searchwordindex)) i++;
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      }
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    }
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    return false;
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  }
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  var words = getSearchWords(document.URL);
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  if (!words.length) words = getSearchWords(document.referrer);
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  if (words.length) {
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    for (var w in words) {
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      if (words[w].length) highlightWord(div, words[w], w);
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    }
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  }
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}
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function enableControl(id, enabled) {
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  if (typeof(enabled) == "undefined") enabled = true;
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  var control = document.getElementById(id);
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  if (!control) return;
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  control.disabled = !enabled;
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  var label = getAncestorByTagName(control, "label");
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  if (label) {
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    label.className = enabled ? "enabled" : "disabled";
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  } else {
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    var labels = document.getElementsByTagName("label");
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    for (var i = 0; i < labels.length; i++) {
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      if (labels[i].htmlFor == id) {
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        labels[i].className = enabled ? "enabled" : "disabled";
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        break;
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      }
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    }
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  }
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}
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function addHeadingLinks(container, title) {
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  var base = document.location.pathname;
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  function addLinks(elems) {
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    for (var i = 0; i < elems.length; i++) {
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      var hn = elems[i];
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      if (hn.id) {
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        var link = document.createElement('a');
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        link.href = base + '#' + hn.id;
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        link.className = 'anchor';
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        link.title = title.replace(/\$id/, hn.id);
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        link.appendChild(document.createTextNode(" \u00B6"));
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        hn.appendChild(link);
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      }
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    }
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  }
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  for (var lvl = 0; lvl <= 6; lvl++) {
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    addLinks(container.getElementsByTagName('h' + lvl));
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  }
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}