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