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   1  // script.aculo.us builder.js v1.8.0, Tue Nov 06 15:01:40 +0300 2007
   2  
   3  // Copyright (c) 2005-2007 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
   4  //
   5  // script.aculo.us is freely distributable under the terms of an MIT-style license.
   6  // For details, see the script.aculo.us web site: http://script.aculo.us/
   7  
   8  var Builder = {
   9    NODEMAP: {
  10      AREA: 'map',
  11      CAPTION: 'table',
  12      COL: 'table',
  13      COLGROUP: 'table',
  14      LEGEND: 'fieldset',
  15      OPTGROUP: 'select',
  16      OPTION: 'select',
  17      PARAM: 'object',
  18      TBODY: 'table',
  19      TD: 'table',
  20      TFOOT: 'table',
  21      TH: 'table',
  22      THEAD: 'table',
  23      TR: 'table'
  24    },
  25    // note: For Firefox < 1.5, OPTION and OPTGROUP tags are currently broken,
  26    //       due to a Firefox bug
  27    node: function(elementName) {
  28      elementName = elementName.toUpperCase();
  29      
  30      // try innerHTML approach
  31      var parentTag = this.NODEMAP[elementName] || 'div';
  32      var parentElement = document.createElement(parentTag);
  33      try { // prevent IE "feature": http://dev.rubyonrails.org/ticket/2707
  34        parentElement.innerHTML = "<" + elementName + "></" + elementName + ">";
  35      } catch(e) {}
  36      var element = parentElement.firstChild || null;
  37        
  38      // see if browser added wrapping tags
  39      if(element && (element.tagName.toUpperCase() != elementName))
  40        element = element.getElementsByTagName(elementName)[0];
  41      
  42      // fallback to createElement approach
  43      if(!element) element = document.createElement(elementName);
  44      
  45      // abort if nothing could be created
  46      if(!element) return;
  47  
  48      // attributes (or text)
  49      if(arguments[1])
  50        if(this._isStringOrNumber(arguments[1]) ||
  51          (arguments[1] instanceof Array) ||
  52          arguments[1].tagName) {
  53            this._children(element, arguments[1]);
  54          } else {
  55            var attrs = this._attributes(arguments[1]);
  56            if(attrs.length) {
  57              try { // prevent IE "feature": http://dev.rubyonrails.org/ticket/2707
  58                parentElement.innerHTML = "<" +elementName + " " +
  59                  attrs + "></" + elementName + ">";
  60              } catch(e) {}
  61              element = parentElement.firstChild || null;
  62              // workaround firefox 1.0.X bug
  63              if(!element) {
  64                element = document.createElement(elementName);
  65                for(attr in arguments[1]) 
  66                  element[attr == 'class' ? 'className' : attr] = arguments[1][attr];
  67              }
  68              if(element.tagName.toUpperCase() != elementName)
  69                element = parentElement.getElementsByTagName(elementName)[0];
  70            }
  71          } 
  72  
  73      // text, or array of children
  74      if(arguments[2])
  75        this._children(element, arguments[2]);
  76  
  77       return element;
  78    },
  79    _text: function(text) {
  80       return document.createTextNode(text);
  81    },
  82  
  83    ATTR_MAP: {
  84      'className': 'class',
  85      'htmlFor': 'for'
  86    },
  87  
  88    _attributes: function(attributes) {
  89      var attrs = [];
  90      for(attribute in attributes)
  91        attrs.push((attribute in this.ATTR_MAP ? this.ATTR_MAP[attribute] : attribute) +
  92            '="' + attributes[attribute].toString().escapeHTML().gsub(/"/,'&quot;') + '"');
  93      return attrs.join(" ");
  94    },
  95    _children: function(element, children) {
  96      if(children.tagName) {
  97        element.appendChild(children);
  98        return;
  99      }
 100      if(typeof children=='object') { // array can hold nodes and text
 101        children.flatten().each( function(e) {
 102          if(typeof e=='object')
 103            element.appendChild(e)
 104          else
 105            if(Builder._isStringOrNumber(e))
 106              element.appendChild(Builder._text(e));
 107        });
 108      } else
 109        if(Builder._isStringOrNumber(children))
 110          element.appendChild(Builder._text(children));
 111    },
 112    _isStringOrNumber: function(param) {
 113      return(typeof param=='string' || typeof param=='number');
 114    },
 115    build: function(html) {
 116      var element = this.node('div');
 117      $(element).update(html.strip());
 118      return element.down();
 119    },
 120    dump: function(scope) { 
 121      if(typeof scope != 'object' && typeof scope != 'function') scope = window; //global scope 
 122    
 123      var tags = ("A ABBR ACRONYM ADDRESS APPLET AREA B BASE BASEFONT BDO BIG BLOCKQUOTE BODY " +
 124        "BR BUTTON CAPTION CENTER CITE CODE COL COLGROUP DD DEL DFN DIR DIV DL DT EM FIELDSET " +
 125        "FONT FORM FRAME FRAMESET H1 H2 H3 H4 H5 H6 HEAD HR HTML I IFRAME IMG INPUT INS ISINDEX "+
 126        "KBD LABEL LEGEND LI LINK MAP MENU META NOFRAMES NOSCRIPT OBJECT OL OPTGROUP OPTION P "+
 127        "PARAM PRE Q S SAMP SCRIPT SELECT SMALL SPAN STRIKE STRONG STYLE SUB SUP TABLE TBODY TD "+
 128        "TEXTAREA TFOOT TH THEAD TITLE TR TT U UL VAR").split(/\s+/);
 129    
 130      tags.each( function(tag){ 
 131        scope[tag] = function() { 
 132          return Builder.node.apply(Builder, [tag].concat($A(arguments)));  
 133        } 
 134      });
 135    }
 136  }