| // Copyright 2011 The Closure Library Authors. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS-IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| /** |
| * @fileoverview Provides data persistence using HTML5 session storage |
| * mechanism. Session storage must be available under window.sessionStorage, |
| * see: http://www.w3.org/TR/webstorage/#the-sessionstorage-attribute. |
| * |
| */ |
| |
| goog.provide('goog.storage.mechanism.HTML5SessionStorage'); |
| |
| goog.require('goog.storage.mechanism.HTML5WebStorage'); |
| |
| |
| |
| /** |
| * Provides a storage mechanism that uses HTML5 session storage. |
| * |
| * @constructor |
| * @extends {goog.storage.mechanism.HTML5WebStorage} |
| */ |
| goog.storage.mechanism.HTML5SessionStorage = function() { |
| var storage = null; |
| /** @preserveTry */ |
| try { |
| // May throw an exception in cases where the session storage object is |
| // visible but access to it is disabled. For example, accessing the file |
| // in local mode in Firefox throws 'Operation is not supported' exception. |
| storage = window.sessionStorage || null; |
| } catch (e) {} |
| goog.storage.mechanism.HTML5SessionStorage.base(this, 'constructor', storage); |
| }; |
| goog.inherits(goog.storage.mechanism.HTML5SessionStorage, |
| goog.storage.mechanism.HTML5WebStorage); |