/*
|
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;
|
}
|
});
|
