michael@0: // script.aculo.us builder.js v1.7.1_beta2, Tue May 15 15:15:45 EDT 2007
michael@0: 
michael@0: // Copyright (c) 2005-2007 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
michael@0: //
michael@0: // script.aculo.us is freely distributable under the terms of an MIT-style license.
michael@0: // For details, see the script.aculo.us web site: http://script.aculo.us/
michael@0: 
michael@0: var Builder = {
michael@0:   NODEMAP: {
michael@0:     AREA: 'map',
michael@0:     CAPTION: 'table',
michael@0:     COL: 'table',
michael@0:     COLGROUP: 'table',
michael@0:     LEGEND: 'fieldset',
michael@0:     OPTGROUP: 'select',
michael@0:     OPTION: 'select',
michael@0:     PARAM: 'object',
michael@0:     TBODY: 'table',
michael@0:     TD: 'table',
michael@0:     TFOOT: 'table',
michael@0:     TH: 'table',
michael@0:     THEAD: 'table',
michael@0:     TR: 'table'
michael@0:   },
michael@0:   // note: For Firefox < 1.5, OPTION and OPTGROUP tags are currently broken,
michael@0:   //       due to a Firefox bug
michael@0:   node: function(elementName) {
michael@0:     elementName = elementName.toUpperCase();
michael@0:     
michael@0:     // try innerHTML approach
michael@0:     var parentTag = this.NODEMAP[elementName] || 'div';
michael@0:     var parentElement = document.createElement(parentTag);
michael@0:     try { // prevent IE "feature": http://dev.rubyonrails.org/ticket/2707
michael@0:       parentElement.innerHTML = "<" + elementName + "></" + elementName + ">";
michael@0:     } catch(e) {}
michael@0:     var element = parentElement.firstChild || null;
michael@0:       
michael@0:     // see if browser added wrapping tags
michael@0:     if(element && (element.tagName.toUpperCase() != elementName))
michael@0:       element = element.getElementsByTagName(elementName)[0];
michael@0:     
michael@0:     // fallback to createElement approach
michael@0:     if(!element) element = document.createElement(elementName);
michael@0:     
michael@0:     // abort if nothing could be created
michael@0:     if(!element) return;
michael@0: 
michael@0:     // attributes (or text)
michael@0:     if(arguments[1])
michael@0:       if(this._isStringOrNumber(arguments[1]) ||
michael@0:         (arguments[1] instanceof Array) ||
michael@0:         arguments[1].tagName) {
michael@0:           this._children(element, arguments[1]);
michael@0:         } else {
michael@0:           var attrs = this._attributes(arguments[1]);
michael@0:           if(attrs.length) {
michael@0:             try { // prevent IE "feature": http://dev.rubyonrails.org/ticket/2707
michael@0:               parentElement.innerHTML = "<" +elementName + " " +
michael@0:                 attrs + "></" + elementName + ">";
michael@0:             } catch(e) {}
michael@0:             element = parentElement.firstChild || null;
michael@0:             // workaround firefox 1.0.X bug
michael@0:             if(!element) {
michael@0:               element = document.createElement(elementName);
michael@0:               for(attr in arguments[1]) 
michael@0:                 element[attr == 'class' ? 'className' : attr] = arguments[1][attr];
michael@0:             }
michael@0:             if(element.tagName.toUpperCase() != elementName)
michael@0:               element = parentElement.getElementsByTagName(elementName)[0];
michael@0:           }
michael@0:         } 
michael@0: 
michael@0:     // text, or array of children
michael@0:     if(arguments[2])
michael@0:       this._children(element, arguments[2]);
michael@0: 
michael@0:      return element;
michael@0:   },
michael@0:   _text: function(text) {
michael@0:      return document.createTextNode(text);
michael@0:   },
michael@0: 
michael@0:   ATTR_MAP: {
michael@0:     'className': 'class',
michael@0:     'htmlFor': 'for'
michael@0:   },
michael@0: 
michael@0:   _attributes: function(attributes) {
michael@0:     var attrs = [];
michael@0:     for(attribute in attributes)
michael@0:       attrs.push((attribute in this.ATTR_MAP ? this.ATTR_MAP[attribute] : attribute) +
michael@0:           '="' + attributes[attribute].toString().escapeHTML().gsub(/"/,'&quot;') + '"');
michael@0:     return attrs.join(" ");
michael@0:   },
michael@0:   _children: function(element, children) {
michael@0:     if(children.tagName) {
michael@0:       element.appendChild(children);
michael@0:       return;
michael@0:     }
michael@0:     if(typeof children=='object') { // array can hold nodes and text
michael@0:       children.flatten().each( function(e) {
michael@0:         if(typeof e=='object')
michael@0:           element.appendChild(e)
michael@0:         else
michael@0:           if(Builder._isStringOrNumber(e))
michael@0:             element.appendChild(Builder._text(e));
michael@0:       });
michael@0:     } else
michael@0:       if(Builder._isStringOrNumber(children))
michael@0:         element.appendChild(Builder._text(children));
michael@0:   },
michael@0:   _isStringOrNumber: function(param) {
michael@0:     return(typeof param=='string' || typeof param=='number');
michael@0:   },
michael@0:   build: function(html) {
michael@0:     var element = this.node('div');
michael@0:     $(element).update(html.strip());
michael@0:     return element.down();
michael@0:   },
michael@0:   dump: function(scope) { 
michael@0:     if(typeof scope != 'object' && typeof scope != 'function') scope = window; //global scope 
michael@0:   
michael@0:     var tags = ("A ABBR ACRONYM ADDRESS APPLET AREA B BASE BASEFONT BDO BIG BLOCKQUOTE BODY " +
michael@0:       "BR BUTTON CAPTION CENTER CITE CODE COL COLGROUP DD DEL DFN DIR DIV DL DT EM FIELDSET " +
michael@0:       "FONT FORM FRAME FRAMESET H1 H2 H3 H4 H5 H6 HEAD HR HTML I IFRAME IMG INPUT INS ISINDEX "+
michael@0:       "KBD LABEL LEGEND LI LINK MAP MENU META NOFRAMES NOSCRIPT OBJECT OL OPTGROUP OPTION P "+
michael@0:       "PARAM PRE Q S SAMP SCRIPT SELECT SMALL SPAN STRIKE STRONG STYLE SUB SUP TABLE TBODY TD "+
michael@0:       "TEXTAREA TFOOT TH THEAD TITLE TR TT U UL VAR").split(/\s+/);
michael@0:   
michael@0:     tags.each( function(tag){ 
michael@0:       scope[tag] = function() { 
michael@0:         return Builder.node.apply(Builder, [tag].concat($A(arguments)));  
michael@0:       } 
michael@0:     });
michael@0:   }
michael@0: }