SOURCE CODE: Uize.Parse.Xml.TagAttribute

/*______________
|       ______  |   U I Z E    J A V A S C R I P T    F R A M E W O R K
|     /      /  |   ---------------------------------------------------
|    /    O /   |    MODULE : Uize.Parse.Xml.TagAttribute Object
|   /    / /    |
|  /    / /  /| |    ONLINE : http://uize.com
| /____/ /__/_| | COPYRIGHT : (c)2014 UIZE
|          /___ |   LICENSE : Available under MIT License or GNU General Public License
|_______________|             http://uize.com/license.html
*/

/* Module Meta Data
  type: Object
  importance: 4
  codeCompleteness: 100
  docCompleteness: 2
*/

/*?
  Introduction
    The =Uize.Parse.Xml.TagAttribute= module provides methods for parsing and serializing individual tag attributes of XML tags.

    *DEVELOPERS:* `Chris van Rensburg`
*/

Uize.module ({
  name:'Uize.Parse.Xml.TagAttribute',
  required:[
    'Uize.Str.Whitespace',
    'Uize.Parse.Xml.TagOrAttributeName',
    'Uize.Parse.Xml.TagAttributeValue'
  ],
  builder:function () {
    'use strict';

    var
      /*** Variables for Performance Optimization ***/
        _Uize_Util_Xml_TagOrAttributeName = Uize.Parse.Xml.TagOrAttributeName,
        _Uize_Util_Xml_TagAttributeValue = Uize.Parse.Xml.TagAttributeValue,
        _indexOfNonWhitespace = Uize.Str.Whitespace.indexOfNonWhitespace
    ;

    return Uize.mergeInto (
      function (_source,_index) {
        var m = this;
        m.name = new _Uize_Util_Xml_TagOrAttributeName;
        m.value = new _Uize_Util_Xml_TagAttributeValue;
        m.parse (_source,_index);
      },

      {
        prototype:{
          source:'',
          index:0,
          length:0,
          isValid:false,

          parse:function (_source,_index) {
            function _eatWhitespace () {
              _index = (_indexOfNonWhitespace (_source,_index) + 1 || _sourceLength + 1) - 1;
            }
            var
              m = this,
              _sourceLength = (m.source = _source = _source || '').length
            ;
            m.index = _index || (_index = 0);
            m.name.parse (_source,_index);
            if (m.name.isValid) {
              _index += m.name.length;
              _eatWhitespace ();
              if (_source.charAt (_index) == "=") {
                _index++;
                _eatWhitespace ();
                m.value.parse (_source,_index);
                _index += m.value.length;
              }
            }
            m.isValid = !!(m.length = _index - m.index);
          },

          serialize:function () {
            return this.isValid ? this.name.serialize () + '=' + this.value.serialize () : '';
          }
        }
      }
    );
  }
});