text: /*
  This file is part of Ext JS 4.2
  
  Copyright (c) 2011-2013 Sencha Inc
  
  Contact:  http://www.sencha.com/contact
  
  GNU General Public License Usage
  This file may be used under the terms of the GNU General Public License version 3.0 as
  published by the Free Software Foundation and appearing in the file LICENSE included in the
  packaging of this file.
  
  Please review the following information to ensure the GNU General Public License version 3.0
  requirements will be met: http://www.gnu.org/copyleft/gpl.html.
  
  If you are unsure which license is appropriate for your use, please contact the sales department
  at http://www.sencha.com/contact.
  
  Build date: 2013-05-16 14:36:50 (f9be68accb407158ba2b1be2c226a6ce1f649314)
  */
  /**
   * @class Ext.state.LocalStorageProvider
   * A Provider implementation which saves and retrieves state via the HTML5 localStorage object.
   * If the browser does not support local storage, there will be no attempt to read the state.
   * Before creating this class, a check should be made to {@link Ext.supports#LocalStorage}.
   */
  
  Ext.define('Ext.state.LocalStorageProvider', {
      /* Begin Definitions */
      
      extend: 'Ext.state.Provider',
      
      alias: 'state.localstorage',
      
      /* End Definitions */
     
      constructor: function(){
          var me = this;
          me.callParent(arguments);
          me.store = me.getStorageObject();
          if (me.store) {
              me.state = me.readLocalStorage();
          } else {
              me.state = {};
          }
      },
      
      readLocalStorage: function(){
          var store = this.store,
              i = 0,
              len = store.length,
              prefix = this.prefix,
              prefixLen = prefix.length,
              data = {},
              key;
              
          for (; i < len; ++i) {
              key = store.key(i);
              if (key.substring(0, prefixLen) == prefix) {
                  data[key.substr(prefixLen)] = this.decodeValue(store.getItem(key));
              }            
          }
          return data;
      },
      
      set : function(name, value){
          var me = this;
          
          me.clear(name);
          if (typeof value == "undefined" || value === null) {
              return;
          }
          me.store.setItem(me.prefix + name, me.encodeValue(value));
          me.callParent(arguments);
      },
  
      // private
      clear : function(name){
          this.store.removeItem(this.prefix + name);
          this.callParent(arguments);
      },
      
      getStorageObject: function(){
          if (Ext.supports.LocalStorage) {
              return window.localStorage;
          }
          //<debug>
          Ext.Error.raise('LocalStorage is not supported by the current browser');
          //</debug>
          return false;
      }    
  });
  