MediaWiki:UIElements.js

// <source lang="javascript"> /*

 Read UI elements from the DOM. Used by the upload form rewrite.

 Author: User:Lupo, March 2008
 License: Quadruple licensed GFDL, GPL, LGPL and Creative Commons Attribution 3.0 (CC-BY-3.0)

 Choose whichever license of these you like best :-)

• /

var UIElements = {

 defaultLanguage : 'en',

 getElementsByClassName : function (elem, tag, classes) {
   // getElementsByClassName in wikibits.js has been changed in a contract-breaking way and
   // newly won't work anymore with regexp strings or arrays of strings passed as classes.
   // We need this functionality here, so we have our own copy of this function.
   var arrElements = (tag == "*" && elem.all) ? elem.all : elem.getElementsByTagName (tag);
   var arrReturnElements = new Array();
   var arrRegExpClassNames = new Array();

   if (typeof classes == "object") {
     for (var i=0; i < classes.length; i++){
       arrRegExpClassNames[arrRegExpClassNames.length] =
         new RegExp("(^|\\s)" + classes[i].replace(/\-/g, "\\-") + "(\\s|$)");
     }
   } else {
     arrRegExpClassNames[arrRegExpClassNames.length] =
       new RegExp("(^|\\s)" + classes.replace(/\-/g, "\\-") + "(\\s|$)");
   }

   var this_elem;
   var matches_all;

   for (var j=0; j < arrElements.length; j++){
     this_elem = arrElements[j];
     matches_all = true;
     for (var k=0; k < arrRegExpClassNames.length; k++){
       if (!arrRegExpClassNames[k].test (this_elem.className)) {
         matches_all = false;
         break;
       }
     }
     if (matches_all) {
       arrReturnElements[arrReturnElements.length] = this_elem;
     }
   }
   return (arrReturnElements)
 },
 
 load : function (container_name, items, tag, repository, default_language, doc)
 { 
   doc = doc || document;

   function add_item (item, lang)
   {
     var classes = item.className.split (' ');
     var node = null;
     if (item.ownerDocument != document && document.importNode)
       node = document.importNode (item, true);
     else
       node = item.cloneNode (true);
     UIElements.setEntry (classes[0], repository, node, lang, classes.slice (1));
   }
   
   if (!container_name || container_name.length == 0 || container_name == '*') return repository;
   var base = UIElements.getElementsByClassName (doc, 'div', container_name);
   if (!base || base.length == 0) return repository;
   
   if (!items || items.length == 0)
     items = ['wp\\S*'];
   else if (items && typeof (items) == 'string')
     items = [items];
   if (!repository) repository = UIElements.emptyRepository (default_language);
   
   for (var i = 0; i < base.length; i++) {
     var b = base[i];
     var lang = (b.getAttribute ('lang') || repository.defaultLanguage).replace(/-/g, '_');
     for (var j = 0; j < items.length; j++) {
       var nodes = UIElements.getElementsByClassName (b, tag || '*', items[j]);
       if (nodes) {
         for (var k = 0; k < nodes.length; k++) add_item (nodes[k], lang);
       }
     }
   }
   return repository;
 },
 
 getEntry : function (id, repository, lang, selector)
 {
   if (repository && repository[id]) {
     if (!lang || lang.length == 0)
       lang = repository.defaultLanguage || UIElements.defaultLanguage;
     lang = lang.replace (/-/g, '_');
     if (repository[id][lang]) {
       if (selector == '*')
         return repository[id][lang];
       else if (!selector || selector.length == 0)
         return repository[id][lang]._default;
       else
         return repository[id][lang][selector.replace (/-/g, '_')];
     }
   }
   return null;
 },
 
 setEntry : function (id, repository, value, lang, selectors)
 {
   if (!repository) return null;
   if (!lang) lang = repository.defaultLanguage;
   lang = lang.replace (/-/g, '_');
   id   = id.replace(/-/g, '_');
   if (!repository[id]) repository[id] = new Object ();
   if (!repository[id][lang]) repository[id][lang] = new Object ();
   if (!selectors || selectors.length == 0)
     repository[id][lang]._default = value;
   else {
     for (var k = 0; k < selectors.length; k++) {
       if (!selectors[k] || selectors[k].length == 0)
         repository[id][lang]._default = value;
       else
         repository[id][lang][selectors[k].replace (/-/g, '_')] = value;
     }
   }
 },
 
 emptyRepository : function (default_language)
 {
   var repository = new Object ();
   repository.defaultLanguage = default_language || UIElements.defaultLanguage;
   return repository;
 }
 

} // end UIElements // </source>