// Copyright (c) 2005 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us) // // See scriptaculous.js for full license. var Builder = { NODEMAP: { AREA: 'map', CAPTION: 'table', COL: 'table', COLGROUP: 'table', LEGEND: 'fieldset', OPTGROUP: 'select', OPTION: 'select', PARAM: 'object', TBODY: 'table', TD: 'table', TFOOT: 'table', TH: 'table', THEAD: 'table', TR: 'table' }, // note: For Firefox < 1.5, OPTION and OPTGROUP tags are currently broken, // due to a Firefox bug node: function(elementName) { elementName = elementName.toUpperCase(); // try innerHTML approach var parentTag = this.NODEMAP[elementName] || 'div'; var parentElement = document.createElement(parentTag); try { // prevent IE "feature": http://dev.rubyonrails.org/ticket/2707 parentElement.innerHTML = "<" + elementName + "></" + elementName + ">"; } catch(e) {} var element = parentElement.firstChild || null; // see if browser added wrapping tags if(element && (element.tagName != elementName)) element = element.getElementsByTagName(elementName)[0]; // fallback to createElement approach if(!element) element = document.createElement(elementName); // abort if nothing could be created if(!element) return; // attributes (or text) if(arguments[1]) if(this._isStringOrNumber(arguments[1]) || (arguments[1] instanceof Array)) { this._children(element, arguments[1]); } else { var attrs = this._attributes(arguments[1]); if(attrs.length) { try { // prevent IE "feature": http://dev.rubyonrails.org/ticket/2707 parentElement.innerHTML = "<" +elementName + " " + attrs + "></" + elementName + ">"; } catch(e) {} element = parentElement.firstChild || null; // workaround firefox 1.0.X bug if(!element) { element = document.createElement(elementName); for(attr in arguments[1]) element[attr == 'class' ? 'className' : attr] = arguments[1][attr]; } if(element.tagName != elementName) element = parentElement.getElementsByTagName(elementName)[0]; } } // text, or array of children if(arguments[2]) this._children(element, arguments[2]); return element; }, _text: function(text) { return document.createTextNode(text); }, _attributes: function(attributes) { var attrs = []; for(attribute in attributes) attrs.push((attribute=='className' ? 'class' : attribute) + '="' + attributes[attribute].toString().escapeHTML() + '"'); return attrs.join(" "); }, _children: function(element, children) { if(typeof children=='object') { // array can hold nodes and text children.flatten().each( function(e) { if(typeof e=='object') element.appendChild(e) else if(Builder._isStringOrNumber(e)) element.appendChild(Builder._text(e)); }); } else if(Builder._isStringOrNumber(children)) element.appendChild(Builder._text(children)); }, _isStringOrNumber: function(param) { return(typeof param=='string' || typeof param=='number'); } }