/testing/selenium-core/lib/scriptaculous/builder.js

  1// Copyright (c) 2005 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
  2//
  3// See scriptaculous.js for full license.
  4
  5var Builder = {
  6  NODEMAP: {
  7    AREA: 'map',
  8    CAPTION: 'table',
  9    COL: 'table',
 10    COLGROUP: 'table',
 11    LEGEND: 'fieldset',
 12    OPTGROUP: 'select',
 13    OPTION: 'select',
 14    PARAM: 'object',
 15    TBODY: 'table',
 16    TD: 'table',
 17    TFOOT: 'table',
 18    TH: 'table',
 19    THEAD: 'table',
 20    TR: 'table'
 21  },
 22  // note: For Firefox < 1.5, OPTION and OPTGROUP tags are currently broken,
 23  //       due to a Firefox bug
 24  node: function(elementName) {
 25    elementName = elementName.toUpperCase();
 26    
 27    // try innerHTML approach
 28    var parentTag = this.NODEMAP[elementName] || 'div';
 29    var parentElement = document.createElement(parentTag);
 30    try { // prevent IE "feature": http://dev.rubyonrails.org/ticket/2707
 31      parentElement.innerHTML = "<" + elementName + "></" + elementName + ">";
 32    } catch(e) {}
 33    var element = parentElement.firstChild || null;
 34      
 35    // see if browser added wrapping tags
 36    if(element && (element.tagName != elementName))
 37      element = element.getElementsByTagName(elementName)[0];
 38    
 39    // fallback to createElement approach
 40    if(!element) element = document.createElement(elementName);
 41    
 42    // abort if nothing could be created
 43    if(!element) return;
 44
 45    // attributes (or text)
 46    if(arguments[1])
 47      if(this._isStringOrNumber(arguments[1]) ||
 48        (arguments[1] instanceof Array)) {
 49          this._children(element, arguments[1]);
 50        } else {
 51          var attrs = this._attributes(arguments[1]);
 52          if(attrs.length) {
 53            try { // prevent IE "feature": http://dev.rubyonrails.org/ticket/2707
 54              parentElement.innerHTML = "<" +elementName + " " +
 55                attrs + "></" + elementName + ">";
 56            } catch(e) {}
 57            element = parentElement.firstChild || null;
 58            // workaround firefox 1.0.X bug
 59            if(!element) {
 60              element = document.createElement(elementName);
 61              for(attr in arguments[1]) 
 62                element[attr == 'class' ? 'className' : attr] = arguments[1][attr];
 63            }
 64            if(element.tagName != elementName)
 65              element = parentElement.getElementsByTagName(elementName)[0];
 66            }
 67        } 
 68
 69    // text, or array of children
 70    if(arguments[2])
 71      this._children(element, arguments[2]);
 72
 73     return element;
 74  },
 75  _text: function(text) {
 76     return document.createTextNode(text);
 77  },
 78  _attributes: function(attributes) {
 79    var attrs = [];
 80    for(attribute in attributes)
 81      attrs.push((attribute=='className' ? 'class' : attribute) +
 82          '="' + attributes[attribute].toString().escapeHTML() + '"');
 83    return attrs.join(" ");
 84  },
 85  _children: function(element, children) {
 86    if(typeof children=='object') { // array can hold nodes and text
 87      children.flatten().each( function(e) {
 88        if(typeof e=='object')
 89          element.appendChild(e)
 90        else
 91          if(Builder._isStringOrNumber(e))
 92            element.appendChild(Builder._text(e));
 93      });
 94    } else
 95      if(Builder._isStringOrNumber(children)) 
 96         element.appendChild(Builder._text(children));
 97  },
 98  _isStringOrNumber: function(param) {
 99    return(typeof param=='string' || typeof param=='number');
100  }
101}