SOURCE CODE: Uize.Parse.Xml.Text

/*______________
|       ______  |   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.Text 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.Text= module provides methods for parsing and serializing text nodes of XML documents.

    *DEVELOPERS:* `Chris van Rensburg`
*/

Uize.module ({
  name:'Uize.Parse.Xml.Text',
  required:[
    'Uize.Str.Replace',
    'Uize.Util.Html.Encode'
  ],
  builder:function () {
    'use strict';

    var
      /*** Variables for Performance Optimization ***/
        _htmlEncode = Uize.Str.Replace.replacerByLookup ({
          '&':'&',
          '<':'<',
          '>':'>'
        }),
        _htmlDecode = Uize.Util.Html.Encode.decode
    ;
    return Uize.mergeInto (
      function (_source,_index) {
        this.parse (_source,_index);
      },

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

          parse:function (_source,_index) {
            var
              m = this,
              _sourceLength = (m.source = _source = _source || '').length
            ;
            m.index = _index || (_index = 0);
            if (m.isValid = _source.charAt (_index) != '<') {
              var _endPos = ((_source.indexOf ('<',_index + 1)) + 1 || _sourceLength + 1) - 1;
              m.text = _htmlDecode (_source.slice (_index,_endPos));
              m.length = _endPos - _index;
            } else {
              m.text = '';
              m.length = 0;
            }
          },

          serialize:function () {
            return _htmlEncode (this.text);
          }
        }
      }
    );
  }
});