lib/csshover.htc

   1 <attach event="ondocumentready" handler="parseStylesheets" />
   2 <script type="text/javascript">
   3 /**
   4  *      Pseudos - V1.30.050121 - hover & active
   5  *      ---------------------------------------------
   6  *      Peterned - http://www.xs4all.nl/~peterned/
   7  *      (c) 2005 - Peter Nederlof
   8  *
   9  *      Credits  - Arnoud Berendsen
  10  *               - Martin Reurings
  11  *           - Robert Hanson
  12  *
  13  *      howto: body { behavior:url("csshover.htc"); }
  14  *      ---------------------------------------------
  15  */
  16
  17 var currentSheet, doc = window.document, activators = {
  18         onhover:{on:'onmouseover', off:'onmouseout'},
  19         onactive:{on:'onmousedown', off:'onmouseup'}
  20 }
  21
  22 function parseStylesheets() {
  23         var sheets = doc.styleSheets, l = sheets.length;
  24         for(var i=0; i<l; i++)
  25                 parseStylesheet(sheets[i]);
  26 }
  27         function parseStylesheet(sheet) {
  28                 if(sheet.imports) {
  29                         try {
  30                                 var imports = sheet.imports, l = imports.length;
  31                                 for(var i=0; i<l; i++) parseStylesheet(sheet.imports[i]);
  32                         } catch(securityException){}
  33                 }
  34
  35                 try {
  36                         var rules = (currentSheet = sheet).rules, l = rules.length;
  37                         for(var j=0; j<l; j++) parseCSSRule(rules[j]);
  38                 } catch(securityException){}
  39         }
  40
  41         function parseCSSRule(rule) {
  42                 var select = rule.selectorText, style = rule.style.cssText;
  43                 if(!(/(^|\s)(([^a]([^ ]+)?)|(a([^#.][^ ]+)+)):(hover|active)/i).test(select) || !style) return;
  44
  45                 var pseudo = select.replace(/[^:]+:([a-z-]+).*/i, 'on$1');
  46                 var newSelect = select.replace(/(\.([a-z0-9_-]+):[a-z]+)|(:[a-z]+)/gi, '.$2' + pseudo);
  47                 var className = (/\.([a-z0-9_-]*on(hover|active))/i).exec(newSelect)[1];
  48                 var affected = select.replace(/:hover.*$/, '');
  49                 var elements = getElementsBySelect(affected);
  50
  51                 currentSheet.addRule(newSelect, style);
  52                 for(var i=0; i<elements.length; i++)
  53                         new HoverElement(elements[i], className, activators[pseudo]);
  54         }
  55
  56 function HoverElement(node, className, events) {
  57         if(!node.hovers) node.hovers = {};
  58         if(node.hovers[className]) return;
  59         node.hovers[className] = true;
  60         node.attachEvent(events.on,
  61                 function() { node.className += ' ' + className; });
  62         node.attachEvent(events.off,
  63                 function() { node.className =
  64                         node.className.replace(new RegExp('\\s+'+className, 'g'),''); });
  65 }
  66
  67 function getElementsBySelect(rule) {
  68         var parts, nodes = [doc];
  69         parts = rule.split(' ');
  70         for(var i=0; i<parts.length; i++) {
  71                 nodes = getSelectedNodes(parts[i], nodes);
  72         }       return nodes;
  73 }
  74         function getSelectedNodes(select, elements) {
  75                 var result, node, nodes = [];
  76                 var classname = (/\.([a-z0-9_-]+)/i).exec(select);
  77                 var identify = (/\#([a-z0-9_-]+)/i).exec(select);
  78                 var tagName = select.replace(/(\.|\#|\:)[a-z0-9_-]+/i, '');
  79                 for(var i=0; i<elements.length; i++) {
  80                         result = tagName? elements[i].all.tags(tagName):elements[i].all;
  81                         for(var j=0; j<result.length; j++) {
  82                                 node = result[j];
  83                                 if((identify && node.id != identify[1]) || (classname && !(new RegExp('\\b' +
  84                                         classname[1] + '\\b').exec(node.className)))) continue;
  85                                 nodes[nodes.length] = node;
  86                         }
  87                 }       return nodes;
  88         }
  89 </script>