xp-dev.com Git - namibia/blob - public/js/lib/syntaxhighlighter/src/shAutoloader.js

   1 /**
   2  * SyntaxHighlighter
   3  * http://alexgorbatchev.com/SyntaxHighlighter
   4  *
   5  * SyntaxHighlighter is donationware. If you are using it, please donate.
   6  * http://alexgorbatchev.com/SyntaxHighlighter/donate.html
   7  *
   8  * @version
   9  * 3.0.83 (July 02 2010)
  10  *
  11  * @copyright
  12  * Copyright (C) 2004-2010 Alex Gorbatchev.
  13  *
  14  * @license
  15  * Dual licensed under the MIT and GPL licenses.
  16  */
  17 (function() {
  18
  19 var sh = SyntaxHighlighter;
  20
  21 /**
  22  * Provides functionality to dynamically load only the brushes that a needed to render the current page.
  23  *
  24  * There are two syntaxes that autoload understands. For example:
  25  *
  26  * SyntaxHighlighter.autoloader(
  27  *     [ 'applescript',          'Scripts/shBrushAppleScript.js' ],
  28  *     [ 'actionscript3', 'as3', 'Scripts/shBrushAS3.js' ]
  29  * );
  30  *
  31  * or a more easily comprehendable one:
  32  *
  33  * SyntaxHighlighter.autoloader(
  34  *     'applescript       Scripts/shBrushAppleScript.js',
  35  *     'actionscript3 as3 Scripts/shBrushAS3.js'
  36  * );
  37  */
  38 sh.autoloader = function()
  39 {
  40         var list = arguments,
  41                 elements = sh.findElements(),
  42                 brushes = {},
  43                 scripts = {},
  44                 all = SyntaxHighlighter.all,
  45                 allCalled = false,
  46                 allParams = null,
  47                 i
  48                 ;
  49
  50         SyntaxHighlighter.all = function(params)
  51         {
  52                 allParams = params;
  53                 allCalled = true;
  54         };
  55
  56         function addBrush(aliases, url)
  57         {
  58                 for (var i = 0; i < aliases.length; i++)
  59                         brushes[aliases[i]] = url;
  60         };
  61
  62         function getAliases(item)
  63         {
  64                 return item.pop
  65                         ? item
  66                         : item.split(/\s+/)
  67                         ;
  68         }
  69
  70         // create table of aliases and script urls
  71         for (i = 0; i < list.length; i++)
  72         {
  73                 var aliases = getAliases(list[i]),
  74                         url = aliases.pop()
  75                         ;
  76
  77                 addBrush(aliases, url);
  78         }
  79
  80         // dynamically add <script /> tags to the document body
  81         for (i = 0; i < elements.length; i++)
  82         {
  83                 var url = brushes[elements[i].params.brush];
  84
  85                 if (!url)
  86                         continue;
  87
  88                 scripts[url] = false;
  89                 loadScript(url);
  90         }
  91
  92         function loadScript(url)
  93         {
  94                 var script = document.createElement('script'),
  95                         done = false
  96                         ;
  97
  98                 script.src = url;
  99                 script.type = 'text/javascript';
 100                 script.language = 'javascript';
 101                 script.onload = script.onreadystatechange = function()
 102                 {
 103                         if (!done && (!this.readyState || this.readyState == 'loaded' || this.readyState == 'complete'))
 104                         {
 105                                 done = true;
 106                                 scripts[url] = true;
 107                                 checkAll();
 108
 109                                 // Handle memory leak in IE
 110                                 script.onload = script.onreadystatechange = null;
 111                                 script.parentNode.removeChild(script);
 112                         }
 113                 };
 114
 115                 // sync way of adding script tags to the page
 116                 document.body.appendChild(script);
 117         };
 118
 119         function checkAll()
 120         {
 121                 for(var url in scripts)
 122                         if (scripts[url] == false)
 123                                 return;
 124
 125                 if (allCalled)
 126                         SyntaxHighlighter.highlight(allParams);
 127         };
 128 };
 129
 130 })();