1 // script.aculo.us builder.js v1.7.0, Fri Jan 19 19:16:36 CET 2007
  2 
  3 // Copyright (c) 2005, 2006 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           this._children(element, arguments[1]);
 53         } else {
 54           var attrs = this._attributes(arguments[1]);
 55           if(attrs.length) {
 56             try { // prevent IE "feature": http://dev.rubyonrails.org/ticket/2707
 57               parentElement.innerHTML = "<" +elementName + " " +
 58                 attrs + "></" + elementName + ">";
 59             } catch(e) {}
 60             element = parentElement.firstChild || null;
 61             // workaround firefox 1.0.X bug
 62             if(!element) {
 63               element = document.createElement(elementName);
 64               for(attr in arguments[1]) 
 65                 element[attr == 'class' ? 'className' : attr] = arguments[1][attr];
 66             }
 67             if(element.tagName.toUpperCase() != elementName)
 68               element = parentElement.getElementsByTagName(elementName)[0];
 69             }
 70         } 
 71 
 72     // text, or array of children
 73     if(arguments[2])
 74       this._children(element, arguments[2]);
 75 
 76      return element;
 77   },
 78   _text: function(text) {
 79      return document.createTextNode(text);
 80   },
 81 
 82   ATTR_MAP: {
 83     'className': 'class',
 84     'htmlFor': 'for'
 85   },
 86 
 87   _attributes: function(attributes) {
 88     var attrs = [];
 89     for(attribute in attributes)
 90       attrs.push((attribute in this.ATTR_MAP ? this.ATTR_MAP[attribute] : attribute) +
 91           '="' + attributes[attribute].toString().escapeHTML() + '"');
 92     return attrs.join(" ");
 93   },
 94   _children: function(element, children) {
 95     if(typeof children=='object') { // array can hold nodes and text
 96       children.flatten().each( function(e) {
 97         if(typeof e=='object')
 98           element.appendChild(e)
 99         else
100           if(Builder._isStringOrNumber(e))
101             element.appendChild(Builder._text(e));
102       });
103     } else
104       if(Builder._isStringOrNumber(children)) 
105          element.appendChild(Builder._text(children));
106   },
107   _isStringOrNumber: function(param) {
108     return(typeof param=='string' || typeof param=='number');
109   },
110   build: function(html) {
111     var element = this.node('div');
112     $(element).update(html.strip());
113     return element.down();
114   },
115   dump: function(scope) { 
116     if(typeof scope != 'object' && typeof scope != 'function') scope = window; //global scope 
117   
118     var tags = ("A ABBR ACRONYM ADDRESS APPLET AREA B BASE BASEFONT BDO BIG BLOCKQUOTE BODY " +
119       "BR BUTTON CAPTION CENTER CITE CODE COL COLGROUP DD DEL DFN DIR DIV DL DT EM FIELDSET " +
120       "FONT FORM FRAME FRAMESET H1 H2 H3 H4 H5 H6 HEAD HR HTML I IFRAME IMG INPUT INS ISINDEX "+
121       "KBD LABEL LEGEND LI LINK MAP MENU META NOFRAMES NOSCRIPT OBJECT OL OPTGROUP OPTION P "+
122       "PARAM PRE Q S SAMP SCRIPT SELECT SMALL SPAN STRIKE STRONG STYLE SUB SUP TABLE TBODY TD "+
123       "TEXTAREA TFOOT TH THEAD TITLE TR TT U UL VAR").split(/\s+/);
124   
125     tags.each( function(tag){ 
126       scope[tag] = function() { 
127         return Builder.node.apply(Builder, [tag].concat($A(arguments)));  
128       } 
129     });
130   }
131 }
132