1 // script.aculo.us builder.js v1.8.2, Tue Nov 18 18:30:58 +0100 2008
  2 
  3 // Copyright (c) 2005-2008 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(/"/,'"') + '"');
 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 };