[Sommaire] [Imprimer]

   1  // Copyright (c) 2005 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
   2  //
   3  // See scriptaculous.js for full license.
   4  
   5  var Builder = {
   6    NODEMAP: {
   7      AREA: 'map',
   8      CAPTION: 'table',
   9      COL: 'table',
  10      COLGROUP: 'table',
  11      LEGEND: 'fieldset',
  12      OPTGROUP: 'select',
  13      OPTION: 'select',
  14      PARAM: 'object',
  15      TBODY: 'table',
  16      TD: 'table',
  17      TFOOT: 'table',
  18      TH: 'table',
  19      THEAD: 'table',
  20      TR: 'table'
  21    },
  22    // note: For Firefox < 1.5, OPTION and OPTGROUP tags are currently broken,
  23    //       due to a Firefox bug
  24    node: function(elementName) {
  25      elementName = elementName.toUpperCase();
  26      
  27      // try innerHTML approach
  28      var parentTag = this.NODEMAP[elementName] || 'div';
  29      var parentElement = document.createElement(parentTag);
  30      try { // prevent IE "feature": http://dev.rubyonrails.org/ticket/2707
  31        parentElement.innerHTML = "<" + elementName + "></" + elementName + ">";
  32      } catch(e) {}
  33      var element = parentElement.firstChild || null;
  34        
  35      // see if browser added wrapping tags
  36      if(element && (element.tagName != elementName))
  37        element = element.getElementsByTagName(elementName)[0];
  38      
  39      // fallback to createElement approach
  40      if(!element) element = document.createElement(elementName);
  41      
  42      // abort if nothing could be created
  43      if(!element) return;
  44  
  45      // attributes (or text)
  46      if(arguments[1])
  47        if(this._isStringOrNumber(arguments[1]) ||
  48          (arguments[1] instanceof Array)) {
  49            this._children(element, arguments[1]);
  50          } else {
  51            var attrs = this._attributes(arguments[1]);
  52            if(attrs.length) {
  53              try { // prevent IE "feature": http://dev.rubyonrails.org/ticket/2707
  54                parentElement.innerHTML = "<" +elementName + " " +
  55                  attrs + "></" + elementName + ">";
  56              } catch(e) {}
  57              element = parentElement.firstChild || null;
  58              // workaround firefox 1.0.X bug
  59              if(!element) {
  60                element = document.createElement(elementName);
  61                for(attr in arguments[1]) 
  62                  element[attr == 'class' ? 'className' : attr] = arguments[1][attr];
  63              }
  64              if(element.tagName != elementName)
  65                element = parentElement.getElementsByTagName(elementName)[0];
  66              }
  67          } 
  68  
  69      // text, or array of children
  70      if(arguments[2])
  71        this._children(element, arguments[2]);
  72  
  73       return element;
  74    },
  75    _text: function(text) {
  76       return document.createTextNode(text);
  77    },
  78    _attributes: function(attributes) {
  79      var attrs = [];
  80      for(attribute in attributes)
  81        attrs.push((attribute=='className' ? 'class' : attribute) +
  82            '="' + attributes[attribute].toString().escapeHTML() + '"');
  83      return attrs.join(" ");
  84    },
  85    _children: function(element, children) {
  86      if(typeof children=='object') { // array can hold nodes and text
  87        children.flatten().each( function(e) {
  88          if(typeof e=='object')
  89            element.appendChild(e)
  90          else
  91            if(Builder._isStringOrNumber(e))
  92              element.appendChild(Builder._text(e));
  93        });
  94      } else
  95        if(Builder._isStringOrNumber(children)) 
  96           element.appendChild(Builder._text(children));
  97    },
  98    _isStringOrNumber: function(param) {
  99      return(typeof param=='string' || typeof param=='number');
 100    }
 101  }