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
8var 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