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/*
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Copyright (c) 2009, Yahoo! Inc. All rights reserved.
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Code licensed under the BSD License:
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http://developer.yahoo.net/yui/license.txt
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version: 2.8.0r4
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*/
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/**
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* The Storage module manages client-side data storage.
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* @module Storage
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*/
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(function() {
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// internal shorthand
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var Y = YAHOO,
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YU = Y.util,
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YL = Y.lang,
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_logOverwriteError;
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if (! YU.Storage) {
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_logOverwriteError = function(fxName) {
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Y.log('Exception in YAHOO.util.Storage.?? - must be extended by a storage engine'.replace('??', fxName).replace('??', this.getName ? this.getName() : 'Unknown'), 'error');
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};
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/**
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* The Storage class is an HTML 5 storage API clone, used to wrap individual storage implementations with a common API.
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* @class Storage
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* @namespace YAHOO.util
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* @constructor
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* @param location {String} Required. The storage location.
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* @parm name {String} Required. The engine name.
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* @param conf {Object} Required. A configuration object.
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*/
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YU.Storage = function(location, name, conf) {
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var that = this;
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Y.env._id_counter += 1;
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// protected variables
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that._cfg = YL.isObject(conf) ? conf : {};
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that._location = location;
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that._name = name;
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that.isReady = false;
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// public variables
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that.createEvent(that.CE_READY, {scope: that});
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that.createEvent(that.CE_CHANGE, {scope: that});
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that.subscribe(that.CE_READY, function() {
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that.isReady = true;
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});
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};
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YU.Storage.prototype = {
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/**
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* The event name for when the storage item is ready.
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* @property CE_READY
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* @type {String}
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* @public
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*/
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CE_READY: 'YUIStorageReady',
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/**
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* The event name for when the storage item has changed.
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* @property CE_CHANGE
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* @type {String}
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* @public
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*/
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CE_CHANGE: 'YUIStorageChange',
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/**
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* The delimiter uesed between the data type and the data.
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* @property DELIMITER
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* @type {String}
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* @public
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*/
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DELIMITER: '__',
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/**
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* The configuration of the engine.
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* @property _cfg
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* @type {Object}
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* @protected
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*/
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_cfg: '',
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/**
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* The name of this engine.
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* @property _name
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* @type {String}
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* @protected
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*/
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_name: '',
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/**
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* The location for this instance.
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* @property _location
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* @type {String}
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* @protected
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*/
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_location: '',
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/**
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* The current length of the keys.
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* @property length
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* @type {Number}
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* @public
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*/
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length: 0,
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/**
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* This engine singleton has been initialized already.
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* @property isReady
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* @type {String}
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* @protected
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*/
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isReady: false,
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/**
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* Clears any existing key/value pairs.
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* @method clear
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* @public
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*/
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clear: function() {
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this._clear();
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this.length = 0;
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},
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/**
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* Fetches the data stored and the provided key.
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* @method getItem
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* @param key {String} Required. The key used to reference this value (DOMString in HTML 5 spec).
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* @return {String|NULL} The value stored at the provided key (DOMString in HTML 5 spec).
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* @public
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*/
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getItem: function(key) {
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Y.log("Fetching item at " + key);
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var item = this._getItem(key);
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return YL.isValue(item) ? this._getValue(item) : null; // required by HTML 5 spec
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},
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/**
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* Fetches the storage object's name; should be overwritten by storage engine.
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* @method getName
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* @return {String} The name of the data storage object.
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* @public
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*/
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getName: function() {return this._name;},
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/**
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* Tests if the key has been set (not in HTML 5 spec); should be overwritten by storage engine.
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* @method hasKey
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* @param key {String} Required. The key to search for.
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* @return {Boolean} True when key has been set.
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* @public
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*/
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hasKey: function(key) {
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return YL.isString(key) && this._hasKey(key);
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},
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/**
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* Retrieve the key stored at the provided index; should be overwritten by storage engine.
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* @method key
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* @param index {Number} Required. The index to retrieve (unsigned long in HTML 5 spec).
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* @return {String} Required. The key at the provided index (DOMString in HTML 5 spec).
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* @public
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*/
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key: function(index) {
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Y.log("Fetching key at " + index);
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if (YL.isNumber(index) && -1 < index && this.length > index) {
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var value = this._key(index);
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if (value) {return value;}
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}
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// this is thrown according to the HTML5 spec
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throw('INDEX_SIZE_ERR - Storage.setItem - The provided index (' + index + ') is not available');
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},
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/**
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* Remove an item from the data storage.
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* @method setItem
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* @param key {String} Required. The key to remove (DOMString in HTML 5 spec).
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* @public
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*/
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removeItem: function(key) {
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Y.log("removing " + key);
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if (this.hasKey(key)) {
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var oldValue = this._getItem(key);
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if (! oldValue) {oldValue = null;}
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this._removeItem(key);
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this.fireEvent(this.CE_CHANGE, new YU.StorageEvent(this, key, oldValue, null, YU.StorageEvent.TYPE_REMOVE_ITEM));
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}
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else {
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// HTML 5 spec says to do nothing
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}
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},
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/**
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* Adds an item to the data storage.
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* @method setItem
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* @param key {String} Required. The key used to reference this value (DOMString in HTML 5 spec).
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* @param data {Object} Required. The data to store at key (DOMString in HTML 5 spec).
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* @public
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* @throws QUOTA_EXCEEDED_ERROR
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*/
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setItem: function(key, data) {
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Y.log("SETTING " + data + " to " + key);
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if (YL.isString(key)) {
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var eventType = this.hasKey(key) ? YU.StorageEvent.TYPE_UPDATE_ITEM : YU.StorageEvent.TYPE_ADD_ITEM,
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oldValue = this._getItem(key);
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if (! oldValue) {oldValue = null;}
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if (this._setItem(key, this._createValue(data))) {
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this.fireEvent(this.CE_CHANGE, new YU.StorageEvent(this, key, oldValue, data, eventType));
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}
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else {
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// this is thrown according to the HTML5 spec
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throw('QUOTA_EXCEEDED_ERROR - Storage.setItem - The choosen storage method (' +
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this.getName() + ') has exceeded capacity');
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}
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}
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else {
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// HTML 5 spec says to do nothing
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}
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},
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/**
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* Implementation of the clear login; should be overwritten by storage engine.
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* @method _clear
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* @protected
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*/
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_clear: function() {
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_logOverwriteError('_clear');
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return '';
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},
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/**
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* Converts the object into a string, with meta data (type), so it can be restored later.
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* @method _createValue
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* @param s {Object} Required. An object to store.
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* @protected
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*/
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_createValue: function(s) {
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var type = (YL.isNull(s) || YL.isUndefined(s)) ? ('' + s) : typeof s;
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return 'string' === type ? s : type + this.DELIMITER + s;
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},
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/**
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* Implementation of the getItem login; should be overwritten by storage engine.
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* @method _getItem
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* @param key {String} Required. The key used to reference this value.
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* @return {String|NULL} The value stored at the provided key.
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* @protected
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*/
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_getItem: function(key) {
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_logOverwriteError('_getItem');
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return '';
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},
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/**
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* Converts the stored value into its appropriate type.
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* @method _getValue
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* @param s {String} Required. The stored value.
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* @protected
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*/
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_getValue: function(s) {
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var a = s ? s.split(this.DELIMITER) : [];
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if (1 == a.length) {return s;}
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switch (a[0]) {
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case 'boolean': return 'true' === a[1];
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case 'number': return parseFloat(a[1]);
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case 'null': return null;
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default: return a[1];
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}
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},
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/**
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* Implementation of the key logic; should be overwritten by storage engine.
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* @method _key
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* @param index {Number} Required. The index to retrieve (unsigned long in HTML 5 spec).
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* @return {String|NULL} Required. The key at the provided index (DOMString in HTML 5 spec).
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* @protected
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*/
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_key: function(index) {
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_logOverwriteError('_key');
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return '';
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},
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/*
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* Implementation to fetch evaluate the existence of a key.
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* @see YAHOO.util.Storage._hasKey
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*/
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_hasKey: function(key) {
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return null !== this._getItem(key);
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},
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/**
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* Implementation of the removeItem login; should be overwritten by storage engine.
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* @method _removeItem
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* @param key {String} Required. The key to remove.
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* @protected
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*/
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_removeItem: function(key) {
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_logOverwriteError('_removeItem');
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return '';
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},
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/**
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* Implementation of the setItem login; should be overwritten by storage engine.
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* @method _setItem
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* @param key {String} Required. The key used to reference this value.
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* @param data {Object} Required. The data to storage at key.
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* @return {Boolean} True when successful, false when size QUOTA exceeded.
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* @protected
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*/
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_setItem: function(key, data) {
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_logOverwriteError('_setItem');
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return '';
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}
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};
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YL.augmentProto(YU.Storage, YU.EventProvider);
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}
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}());
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/**
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* The StorageManager class is a singleton that registers DataStorage objects and returns instances of those objects.
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* @class StorageManager
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* @namespace YAHOO.util
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* @static
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*/
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(function() {
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// internal shorthand
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var Y = YAHOO.util,
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YL = YAHOO.lang,
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// private variables
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_locationEngineMap = {}, // cached engines
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_registeredEngineSet = [], // set of available engines
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_registeredEngineMap = {}, // map of available engines
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/**
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* Fetches a storage constructor if it is available, otherwise returns NULL.
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* @method _getClass
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* @param klass {Function} Required. The storage constructor to test.
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* @return {Function} An available storage constructor or NULL.
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* @private
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*/
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_getClass = function(klass) {
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return (klass && klass.isAvailable()) ? klass : null;
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},
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/**
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* Fetches the storage engine from the cache, or creates and caches it.
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* @method _getStorageEngine
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* @param location {String} Required. The location to store.
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* @param klass {Function} Required. A pointer to the engineType Class.
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* @param conf {Object} Optional. Additional configuration for the data source engine.
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* @private
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*/
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_getStorageEngine = function(location, klass, conf) {
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var engine = _locationEngineMap[location + klass.ENGINE_NAME];
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if (! engine) {
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engine = new klass(location, conf);
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_locationEngineMap[location + klass.ENGINE_NAME] = engine;
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}
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return engine;
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},
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/**
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* Ensures that the location is valid before returning it or a default value.
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* @method _getValidLocation
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* @param location {String} Required. The location to evaluate.
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* @private
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*/
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_getValidLocation = function(location) {
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switch (location) {
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case Y.StorageManager.LOCATION_LOCAL:
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case Y.StorageManager.LOCATION_SESSION:
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return location;
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default: return Y.StorageManager.LOCATION_SESSION;
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}
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};
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// public namespace
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Y.StorageManager = {
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/**
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* The storage location - session; data cleared at the end of a user's session.
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* @property LOCATION_SESSION
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* @type {String}
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* @static
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*/
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LOCATION_SESSION: 'sessionStorage',
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/**
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* The storage location - local; data cleared on demand.
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* @property LOCATION_LOCAL
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* @type {String}
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* @static
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*/
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LOCATION_LOCAL: 'localStorage',
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/**
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* Fetches the desired engine type or first available engine type.
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* @method get
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* @param engineType {String} Optional. The engine type, see engines.
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* @param location {String} Optional. The storage location - LOCATION_SESSION & LOCATION_LOCAL; default is LOCAL.
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* @param conf {Object} Optional. Additional configuration for the getting the storage engine.
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* {
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* engine: {Object} configuration parameters for the desired engine
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* order: {Array} an array of storage engine names; the desired order to try engines}
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* }
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* @static
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*/
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get: function(engineType, location, conf) {
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var _cfg = YL.isObject(conf) ? conf : {},
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klass = _getClass(_registeredEngineMap[engineType]);
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if (! klass && ! _cfg.force) {
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var i, j;
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if (_cfg.order) {
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j = _cfg.order.length;
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for (i = 0; i < j && ! klass; i += 1) {
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klass = _getClass(_cfg.order[i]);
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}
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}
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if (! klass) {
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j = _registeredEngineSet.length;
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for (i = 0; i < j && ! klass; i += 1) {
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klass = _getClass(_registeredEngineSet[i]);
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}
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}
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}
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if (klass) {
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return _getStorageEngine(_getValidLocation(location), klass, _cfg.engine);
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}
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throw('YAHOO.util.StorageManager.get - No engine available, please include an engine before calling this function.');
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},
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/*
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* Estimates the size of the string using 1 byte for each alpha-numeric character and 3 for each non-alpha-numeric character.
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* @method getByteSize
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* @param s {String} Required. The string to evaulate.
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* @return {Number} The estimated string size.
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* @private
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*/
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getByteSize: function(s) {
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return encodeURIComponent('' + s).length;
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},
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/**
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* Registers a engineType Class with the StorageManager singleton; first in is the first out.
|
|
|
* @method register
|
|
|
* @param engineConstructor {Function} Required. The engine constructor function, see engines.
|
|
|
* @return {Boolean} When successfully registered.
|
|
|
* @static
|
|
|
*/
|
|
|
register: function(engineConstructor) {
|
|
|
if (YL.isFunction(engineConstructor) && YL.isFunction(engineConstructor.isAvailable) && YL.isString(engineConstructor.ENGINE_NAME)) {
|
|
|
_registeredEngineMap[engineConstructor.ENGINE_NAME] = engineConstructor;
|
|
|
_registeredEngineSet.push(engineConstructor);
|
|
|
return true;
|
|
|
}
|
|
|
|
|
|
return false;
|
|
|
}
|
|
|
};
|
|
|
|
|
|
YAHOO.register("StorageManager", Y.SWFStore, {version: "2.8.0r4", build: "2449"});
|
|
|
}());
|
|
|
(function() {
|
|
|
|
|
|
/**
|
|
|
* The StorageEvent class manages the storage events by emulating the HTML 5 implementation.
|
|
|
* @namespace YAHOO.util
|
|
|
* @class StorageEvent
|
|
|
* @constructor
|
|
|
* @param storageArea {Object} Required. The Storage object that was affected.
|
|
|
* @param key {String} Required. The key being changed; DOMString in HTML 5 spec.
|
|
|
* @param oldValue {String} Required. The old value of the key being changed; DOMString in HTML 5 spec.
|
|
|
* @param newValue {String} Required. The new value of the key being changed; DOMString in HTML 5 spec.
|
|
|
* @param type {String} Required. The storage event type.
|
|
|
*/
|
|
|
YAHOO.util.StorageEvent = function(storageArea, key, oldValue, newValue, type) {
|
|
|
this.key = key;
|
|
|
this.oldValue = oldValue;
|
|
|
this.newValue = newValue;
|
|
|
this.url = window.location.href;
|
|
|
this.window = window; // todo: think about the CAJA and innocent code
|
|
|
this.storageArea = storageArea;
|
|
|
this.type = type;
|
|
|
};
|
|
|
|
|
|
YAHOO.lang.augmentObject(YAHOO.util.StorageEvent, {
|
|
|
TYPE_ADD_ITEM: 'addItem',
|
|
|
TYPE_REMOVE_ITEM: 'removeItem',
|
|
|
TYPE_UPDATE_ITEM: 'updateItem'
|
|
|
});
|
|
|
|
|
|
YAHOO.util.StorageEvent.prototype = {
|
|
|
|
|
|
/**
|
|
|
* The 'key' attribute represents the key being changed.
|
|
|
* @property key
|
|
|
* @type {String}
|
|
|
* @static
|
|
|
* @readonly
|
|
|
*/
|
|
|
key: null,
|
|
|
|
|
|
/**
|
|
|
* The 'newValue' attribute represents the new value of the key being changed.
|
|
|
* @property newValue
|
|
|
* @type {String}
|
|
|
* @static
|
|
|
* @readonly
|
|
|
*/
|
|
|
newValue: null,
|
|
|
|
|
|
/**
|
|
|
* The 'oldValue' attribute represents the old value of the key being changed.
|
|
|
* @property oldValue
|
|
|
* @type {String}
|
|
|
* @static
|
|
|
* @readonly
|
|
|
*/
|
|
|
oldValue: null,
|
|
|
|
|
|
/**
|
|
|
* The 'source' attribute represents the WindowProxy object of the browsing context of the document whose key changed.
|
|
|
* @property source
|
|
|
* @type {Object}
|
|
|
* @static
|
|
|
* @readonly
|
|
|
*/
|
|
|
source: null,
|
|
|
|
|
|
/**
|
|
|
* The 'storageArea' attribute represents the Storage object that was affected.
|
|
|
* @property storageArea
|
|
|
* @type {Object}
|
|
|
* @static
|
|
|
* @readonly
|
|
|
*/
|
|
|
storageArea: null,
|
|
|
|
|
|
/**
|
|
|
* The 'type' attribute represents the Storage event type.
|
|
|
* @property type
|
|
|
* @type {Object}
|
|
|
* @static
|
|
|
* @readonly
|
|
|
*/
|
|
|
type: null,
|
|
|
|
|
|
/**
|
|
|
* The 'url' attribute represents the address of the document whose key changed.
|
|
|
* @property url
|
|
|
* @type {String}
|
|
|
* @static
|
|
|
* @readonly
|
|
|
*/
|
|
|
url: null
|
|
|
};
|
|
|
|
|
|
}());
|
|
|
(function() {
|
|
|
var Y = YAHOO.util,
|
|
|
YL = YAHOO.lang;
|
|
|
|
|
|
/**
|
|
|
* The StorageEngineKeyed class implements the interface necessary for managing keys.
|
|
|
* @namespace YAHOO.util
|
|
|
* @class StorageEngineKeyed
|
|
|
* @constructor
|
|
|
* @extend YAHOO.util.Storage
|
|
|
*/
|
|
|
Y.StorageEngineKeyed = function() {
|
|
|
Y.StorageEngineKeyed.superclass.constructor.apply(this, arguments);
|
|
|
this._keys = [];
|
|
|
this._keyMap = {};
|
|
|
};
|
|
|
|
|
|
YL.extend(Y.StorageEngineKeyed, Y.Storage, {
|
|
|
|
|
|
/**
|
|
|
* A collection of keys applicable to the current location. This should never be edited by the developer.
|
|
|
* @property _keys
|
|
|
* @type {Array}
|
|
|
* @protected
|
|
|
*/
|
|
|
_keys: null,
|
|
|
|
|
|
/**
|
|
|
* A map of keys to their applicable position in keys array. This should never be edited by the developer.
|
|
|
* @property _keyMap
|
|
|
* @type {Object}
|
|
|
* @protected
|
|
|
*/
|
|
|
_keyMap: null,
|
|
|
|
|
|
/**
|
|
|
* Adds the key to the set.
|
|
|
* @method _addKey
|
|
|
* @param key {String} Required. The key to evaluate.
|
|
|
* @protected
|
|
|
*/
|
|
|
_addKey: function(key) {
|
|
|
this._keyMap[key] = this.length;
|
|
|
this._keys.push(key);
|
|
|
this.length = this._keys.length;
|
|
|
},
|
|
|
|
|
|
/**
|
|
|
* Evaluates if a key exists in the keys array; indexOf does not work in all flavors of IE.
|
|
|
* @method _indexOfKey
|
|
|
* @param key {String} Required. The key to evaluate.
|
|
|
* @protected
|
|
|
*/
|
|
|
_indexOfKey: function(key) {
|
|
|
var i = this._keyMap[key];
|
|
|
return undefined === i ? -1 : i;
|
|
|
},
|
|
|
|
|
|
/**
|
|
|
* Removes a key from the keys array.
|
|
|
* @method _removeKey
|
|
|
* @param key {String} Required. The key to remove.
|
|
|
* @protected
|
|
|
*/
|
|
|
_removeKey: function(key) {
|
|
|
var j = this._indexOfKey(key),
|
|
|
rest = this._keys.slice(j + 1);
|
|
|
|
|
|
delete this._keyMap[key];
|
|
|
|
|
|
for (var k in this._keyMap) {
|
|
|
if (j < this._keyMap[k]) {
|
|
|
this._keyMap[k] -= 1;
|
|
|
}
|
|
|
}
|
|
|
|
|
|
this._keys.length = j;
|
|
|
this._keys = this._keys.concat(rest);
|
|
|
this.length = this._keys.length;
|
|
|
}
|
|
|
});
|
|
|
}());
|
|
|
/*
|
|
|
* HTML limitations:
|
|
|
* - 5MB in FF and Safari, 10MB in IE 8
|
|
|
* - only FF 3.5 recovers session storage after a browser crash
|
|
|
*
|
|
|
* Thoughts:
|
|
|
* - how can we not use cookies to handle session
|
|
|
*/
|
|
|
(function() {
|
|
|
// internal shorthand
|
|
|
var Y = YAHOO.util,
|
|
|
YL = YAHOO.lang,
|
|
|
|
|
|
/*
|
|
|
* Required for IE 8 to make synchronous.
|
|
|
*/
|
|
|
_beginTransaction = function(engine) {
|
|
|
if (engine.begin) {engine.begin();}
|
|
|
},
|
|
|
|
|
|
/*
|
|
|
* Required for IE 8 to make synchronous.
|
|
|
*/
|
|
|
_commitTransaction = function(engine) {
|
|
|
if (engine.commit) {engine.commit();}
|
|
|
};
|
|
|
|
|
|
/**
|
|
|
* The StorageEngineHTML5 class implements the HTML5 storage engine.
|
|
|
* @namespace YAHOO.util
|
|
|
* @class StorageEngineHTML5
|
|
|
* @constructor
|
|
|
* @extend YAHOO.util.Storage
|
|
|
* @param location {String} Required. The storage location.
|
|
|
* @param conf {Object} Required. A configuration object.
|
|
|
*/
|
|
|
Y.StorageEngineHTML5 = function(location, conf) {
|
|
|
var _this = this;
|
|
|
Y.StorageEngineHTML5.superclass.constructor.call(_this, location, Y.StorageEngineHTML5.ENGINE_NAME, conf);// not set, are cookies available
|
|
|
_this._engine = window[location];
|
|
|
_this.length = _this._engine.length;
|
|
|
YL.later(250, _this, function() { // temporary solution so that CE_READY can be subscribed to after this object is created
|
|
|
_this.fireEvent(_this.CE_READY);
|
|
|
});
|
|
|
};
|
|
|
|
|
|
YAHOO.lang.extend(Y.StorageEngineHTML5, Y.Storage, {
|
|
|
|
|
|
_engine: null,
|
|
|
|
|
|
/*
|
|
|
* Implementation to clear the values from the storage engine.
|
|
|
* @see YAHOO.util.Storage._clear
|
|
|
*/
|
|
|
_clear: function() {
|
|
|
var _this = this;
|
|
|
if (_this._engine.clear) {
|
|
|
_this._engine.clear();
|
|
|
}
|
|
|
// for FF 3, fixed in FF 3.5
|
|
|
else {
|
|
|
for (var i = _this.length, key; 0 <= i; i -= 1) {
|
|
|
key = _this._key(i);
|
|
|
_this._removeItem(key);
|
|
|
}
|
|
|
}
|
|
|
},
|
|
|
|
|
|
/*
|
|
|
* Implementation to fetch an item from the storage engine.
|
|
|
* @see YAHOO.util.Storage._getItem
|
|
|
*/
|
|
|
_getItem: function(key) {
|
|
|
var o = this._engine.getItem(key);
|
|
|
return YL.isObject(o) ? o.value : o; // for FF 3, fixed in FF 3.5
|
|
|
},
|
|
|
|
|
|
/*
|
|
|
* Implementation to fetch a key from the storage engine.
|
|
|
* @see YAHOO.util.Storage._key
|
|
|
*/
|
|
|
_key: function(index) {return this._engine.key(index);},
|
|
|
|
|
|
/*
|
|
|
* Implementation to remove an item from the storage engine.
|
|
|
* @see YAHOO.util.Storage._removeItem
|
|
|
*/
|
|
|
_removeItem: function(key) {
|
|
|
var _this = this;
|
|
|
_beginTransaction(_this._engine);
|
|
|
_this._engine.removeItem(key);
|
|
|
_commitTransaction(_this._engine);
|
|
|
_this.length = _this._engine.length;
|
|
|
},
|
|
|
|
|
|
/*
|
|
|
* Implementation to remove an item from the storage engine.
|
|
|
* @see YAHOO.util.Storage._setItem
|
|
|
*/
|
|
|
_setItem: function(key, value) {
|
|
|
var _this = this;
|
|
|
|
|
|
try {
|
|
|
_beginTransaction(_this._engine);
|
|
|
_this._engine.setItem(key, value);
|
|
|
_commitTransaction(_this._engine);
|
|
|
_this.length = _this._engine.length;
|
|
|
return true;
|
|
|
}
|
|
|
catch (e) {
|
|
|
return false;
|
|
|
}
|
|
|
}
|
|
|
}, true);
|
|
|
|
|
|
Y.StorageEngineHTML5.ENGINE_NAME = 'html5';
|
|
|
Y.StorageEngineHTML5.isAvailable = function() {
|
|
|
return window.localStorage;
|
|
|
};
|
|
|
Y.StorageManager.register(Y.StorageEngineHTML5);
|
|
|
}());
|
|
|
/*
|
|
|
* Gears limitation:
|
|
|
* - SQLite limitations - http://www.sqlite.org/limits.html
|
|
|
* - DB Best Practices - http://code.google.com/apis/gears/gears_faq.html#bestPracticeDB
|
|
|
* - the user must approve before gears can be used
|
|
|
* - each SQL query has a limited number of characters (9948 bytes), data will need to be spread across rows
|
|
|
* - no query should insert or update more than 9948 bytes of data in a single statement or GEARs will throw:
|
|
|
* [Exception... "'Error: SQL statement is too long.' when calling method: [nsIDOMEventListener::handleEvent]" nsresult: "0x8057001c (NS_ERROR_XPC_JS_THREW_JS_OBJECT)" location: "<unknown>" data: no]
|
|
|
*
|
|
|
* Thoughts:
|
|
|
* - we may want to implement additional functions for the gears only implementation
|
|
|
* - how can we not use cookies to handle session location
|
|
|
*/
|
|
|
(function() {
|
|
|
// internal shorthand
|
|
|
var Y = YAHOO.util,
|
|
|
YL = YAHOO.lang,
|
|
|
_SQL_STMT_LIMIT = 9948,
|
|
|
_TABLE_NAME = 'YUIStorageEngine',
|
|
|
|
|
|
// local variables
|
|
|
_engine = null,
|
|
|
|
|
|
eURI = encodeURIComponent,
|
|
|
dURI = decodeURIComponent;
|
|
|
|
|
|
/**
|
|
|
* The StorageEngineGears class implements the Google Gears storage engine.
|
|
|
* @namespace YAHOO.util
|
|
|
* @class StorageEngineGears
|
|
|
* @constructor
|
|
|
* @extend YAHOO.util.Storage
|
|
|
* @param location {String} Required. The storage location.
|
|
|
* @param conf {Object} Required. A configuration object.
|
|
|
*/
|
|
|
Y.StorageEngineGears = function(location, conf) {
|
|
|
var _this = this;
|
|
|
Y.StorageEngineGears.superclass.constructor.call(_this, location, Y.StorageEngineGears.ENGINE_NAME, conf);
|
|
|
|
|
|
if (! _engine) {
|
|
|
// create the database
|
|
|
_engine = google.gears.factory.create(Y.StorageEngineGears.GEARS);
|
|
|
_engine.open(window.location.host + '-' + Y.StorageEngineGears.DATABASE);
|
|
|
_engine.execute('CREATE TABLE IF NOT EXISTS ' + _TABLE_NAME + ' (key TEXT, location TEXT, value TEXT)');
|
|
|
}
|
|
|
|
|
|
var isSessionStorage = Y.StorageManager.LOCATION_SESSION === _this._location,
|
|
|
sessionKey = Y.Cookie.get('sessionKey' + Y.StorageEngineGears.ENGINE_NAME);
|
|
|
|
|
|
if (! sessionKey) {
|
|
|
_engine.execute('BEGIN');
|
|
|
_engine.execute('DELETE FROM ' + _TABLE_NAME + ' WHERE location="' + eURI(Y.StorageManager.LOCATION_SESSION) + '"');
|
|
|
_engine.execute('COMMIT');
|
|
|
}
|
|
|
|
|
|
var rs = _engine.execute('SELECT key FROM ' + _TABLE_NAME + ' WHERE location="' + eURI(_this._location) + '"'),
|
|
|
keyMap = {};
|
|
|
|
|
|
try {
|
|
|
// iterate on the rows and map the keys
|
|
|
while (rs.isValidRow()) {
|
|
|
var fld = dURI(rs.field(0));
|
|
|
|
|
|
if (! keyMap[fld]) {
|
|
|
keyMap[fld] = true;
|
|
|
_this._addKey(fld);
|
|
|
}
|
|
|
|
|
|
rs.next();
|
|
|
}
|
|
|
}
|
|
|
finally {
|
|
|
rs.close();
|
|
|
}
|
|
|
|
|
|
// this is session storage, ensure that the session key is set
|
|
|
if (isSessionStorage) {
|
|
|
Y.Cookie.set('sessionKey' + Y.StorageEngineGears.ENGINE_NAME, true);
|
|
|
}
|
|
|
|
|
|
_this.length = _this._keys.length;
|
|
|
YL.later(250, _this, function() { // temporary solution so that CE_READY can be subscribed to after this object is created
|
|
|
_this.fireEvent(_this.CE_READY);
|
|
|
});
|
|
|
};
|
|
|
|
|
|
YL.extend(Y.StorageEngineGears, Y.StorageEngineKeyed, {
|
|
|
|
|
|
/*
|
|
|
* Implementation to clear the values from the storage engine.
|
|
|
* @see YAHOO.util.Storage._clear
|
|
|
*/
|
|
|
_clear: function() {
|
|
|
_engine.execute('BEGIN');
|
|
|
_engine.execute('DELETE FROM ' + _TABLE_NAME + ' WHERE location="' + eURI(this._location) + '"');
|
|
|
_engine.execute('COMMIT');
|
|
|
this._keys = [];
|
|
|
this.length = 0;
|
|
|
},
|
|
|
|
|
|
/*
|
|
|
* Implementation to fetch an item from the storage engine.
|
|
|
* @see YAHOO.util.Storage._getItem
|
|
|
*/
|
|
|
_getItem: function(key) {
|
|
|
var rs = _engine.execute('SELECT value FROM ' + _TABLE_NAME + ' WHERE key="' + eURI(key) + '" AND location="' + eURI(this._location) + '"'),
|
|
|
value = '';
|
|
|
|
|
|
try {
|
|
|
while (rs.isValidRow()) {
|
|
|
var temp = rs.field(0);
|
|
|
value += rs.field(0);
|
|
|
rs.next();
|
|
|
}
|
|
|
}
|
|
|
finally {
|
|
|
rs.close();
|
|
|
}
|
|
|
|
|
|
return value ? dURI(value) : null;
|
|
|
},
|
|
|
|
|
|
/*
|
|
|
* Implementation to fetch a key from the storage engine.
|
|
|
* @see YAHOO.util.Storage.key
|
|
|
*/
|
|
|
_key: function(index) {return this._keys[index];},
|
|
|
|
|
|
/*
|
|
|
* Implementation to remove an item from the storage engine.
|
|
|
* @see YAHOO.util.Storage._removeItem
|
|
|
*/
|
|
|
_removeItem: function(key) {
|
|
|
_engine.execute('BEGIN');
|
|
|
_engine.execute('DELETE FROM ' + _TABLE_NAME + ' WHERE key="' + eURI(key) + '" AND location="' + eURI(this._location) + '"');
|
|
|
_engine.execute('COMMIT');
|
|
|
this._removeKey(key);
|
|
|
},
|
|
|
|
|
|
/*
|
|
|
* Implementation to remove an item from the storage engine.
|
|
|
* @see YAHOO.util.Storage._setItem
|
|
|
*/
|
|
|
_setItem: function(key, data) {
|
|
|
|
|
|
if (! this.hasKey(key)) {
|
|
|
this._addKey(key);
|
|
|
}
|
|
|
|
|
|
var _key = eURI(key),
|
|
|
_location = eURI(this._location),
|
|
|
_value = eURI(data),
|
|
|
_values = [],
|
|
|
_len = _SQL_STMT_LIMIT - (_key + _location).length;
|
|
|
|
|
|
// the length of the value exceeds the available space
|
|
|
if (_len < _value.length) {
|
|
|
for (var i = 0, j = _value.length; i < j; i += _len) {
|
|
|
_values.push(_value.substr(i, _len));
|
|
|
}
|
|
|
}
|
|
|
else {
|
|
|
_values.push(_value);
|
|
|
}
|
|
|
|
|
|
// Google recommends using INSERT instead of update, because it is faster
|
|
|
_engine.execute('BEGIN');
|
|
|
_engine.execute('DELETE FROM ' + _TABLE_NAME + ' WHERE key="' + eURI(key) + '" AND location="' + eURI(this._location) + '"');
|
|
|
for (var m = 0, n = _values.length; m < n; m += 1) {
|
|
|
_engine.execute('INSERT INTO ' + _TABLE_NAME + ' VALUES ("' + _key + '", "' + _location + '", "' + _values[m] + '")');
|
|
|
}
|
|
|
_engine.execute('COMMIT');
|
|
|
|
|
|
return true;
|
|
|
}
|
|
|
});
|
|
|
|
|
|
// releases the engine when the page unloads
|
|
|
Y.Event.on('unload', function() {
|
|
|
if (_engine) {_engine.close();}
|
|
|
});
|
|
|
Y.StorageEngineGears.ENGINE_NAME = 'gears';
|
|
|
Y.StorageEngineGears.GEARS = 'beta.database';
|
|
|
Y.StorageEngineGears.DATABASE = 'yui.database';
|
|
|
Y.StorageEngineGears.isAvailable = function() {
|
|
|
if (window.google && window.google.gears) {
|
|
|
try {
|
|
|
// this will throw an exception if the user denies gears
|
|
|
google.gears.factory.create(Y.StorageEngineGears.GEARS);
|
|
|
return true;
|
|
|
}
|
|
|
catch (e) {
|
|
|
// no need to do anything
|
|
|
}
|
|
|
}
|
|
|
|
|
|
return false;
|
|
|
};
|
|
|
Y.StorageManager.register(Y.StorageEngineGears);
|
|
|
}());
|
|
|
/*
|
|
|
* SWF limitation:
|
|
|
* - only 100,000 bytes of data may be stored this way
|
|
|
* - data is publicly available on user machine
|
|
|
*
|
|
|
* Thoughts:
|
|
|
* - data can be shared across browsers
|
|
|
* - how can we not use cookies to handle session location
|
|
|
*/
|
|
|
(function() {
|
|
|
// internal shorthand
|
|
|
var Y = YAHOO.util,
|
|
|
YL = YAHOO.lang,
|
|
|
YD = Y.Dom,
|
|
|
|
|
|
/*
|
|
|
* The minimum width required to be able to display the settings panel within the SWF.
|
|
|
*/
|
|
|
MINIMUM_WIDTH = 215,
|
|
|
|
|
|
/*
|
|
|
* The minimum height required to be able to display the settings panel within the SWF.
|
|
|
*/
|
|
|
MINIMUM_HEIGHT = 138,
|
|
|
|
|
|
// local variables
|
|
|
_engine = null,
|
|
|
|
|
|
/*
|
|
|
* Creates a location bound key.
|
|
|
*/
|
|
|
_getKey = function(that, key) {
|
|
|
return that._location + that.DELIMITER + key;
|
|
|
},
|
|
|
|
|
|
/*
|
|
|
* Initializes the engine, if it isn't already initialized.
|
|
|
*/
|
|
|
_initEngine = function(cfg) {
|
|
|
if (! _engine) {
|
|
|
if (! YL.isString(cfg.swfURL)) {cfg.swfURL = Y.StorageEngineSWF.SWFURL;}
|
|
|
if (! cfg.containerID) {
|
|
|
var bd = document.getElementsByTagName('body')[0],
|
|
|
container = bd.appendChild(document.createElement('div'));
|
|
|
cfg.containerID = YD.generateId(container);
|
|
|
}
|
|
|
|
|
|
if (! cfg.attributes) {cfg.attributes = {};}
|
|
|
if (! cfg.attributes.flashVars) {cfg.attributes.flashVars = {};}
|
|
|
cfg.attributes.flashVars.useCompression = 'true';
|
|
|
cfg.attributes.version = 9.115;
|
|
|
_engine = new YAHOO.widget.SWF(cfg.containerID, cfg.swfURL, cfg.attributes);
|
|
|
}
|
|
|
};
|
|
|
|
|
|
/**
|
|
|
* The StorageEngineSWF class implements the SWF storage engine.
|
|
|
* @namespace YAHOO.util
|
|
|
* @class StorageEngineSWF
|
|
|
* @uses YAHOO.widget.SWF
|
|
|
* @constructor
|
|
|
* @extend YAHOO.util.Storage
|
|
|
* @param location {String} Required. The storage location.
|
|
|
* @param conf {Object} Required. A configuration object.
|
|
|
*/
|
|
|
Y.StorageEngineSWF = function(location, conf) {
|
|
|
var _this = this;
|
|
|
Y.StorageEngineSWF.superclass.constructor.call(_this, location, Y.StorageEngineSWF.ENGINE_NAME, conf);
|
|
|
|
|
|
_initEngine(_this._cfg);
|
|
|
|
|
|
// evaluates when the SWF is loaded
|
|
|
_engine.unsubscribe('contentReady'); // prevents local and session content ready callbacks from firing, when switching between context
|
|
|
_engine.addListener("contentReady", function() {
|
|
|
_this._swf = _engine._swf;
|
|
|
_engine.initialized = true;
|
|
|
|
|
|
var isSessionStorage = Y.StorageManager.LOCATION_SESSION === _this._location,
|
|
|
sessionKey = Y.Cookie.get('sessionKey' + Y.StorageEngineSWF.ENGINE_NAME);
|
|
|
|
|
|
for (var i = _engine.callSWF("getLength", []) - 1; 0 <= i; i -= 1) {
|
|
|
var key = _engine.callSWF("getNameAt", [i]),
|
|
|
isKeySessionStorage = -1 < key.indexOf(Y.StorageManager.LOCATION_SESSION + _this.DELIMITER);
|
|
|
|
|
|
// this is session storage, but the session key is not set, so remove item
|
|
|
if (isSessionStorage && ! sessionKey) {
|
|
|
_engine.callSWF("removeItem", [key]);
|
|
|
}
|
|
|
// the key matches the storage type, add to key collection
|
|
|
else if (isSessionStorage === isKeySessionStorage) {
|
|
|
_this._addKey(key);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
// this is session storage, ensure that the session key is set
|
|
|
if (isSessionStorage) {
|
|
|
Y.Cookie.set('sessionKey' + Y.StorageEngineSWF.ENGINE_NAME, true);
|
|
|
}
|
|
|
|
|
|
_this.length = _this._keys.length;
|
|
|
_this.fireEvent(_this.CE_READY);
|
|
|
});
|
|
|
|
|
|
// required for pages with both a session and local storage
|
|
|
if (_engine.initialized) {_engine.fireEvent('contentReady');}
|
|
|
};
|
|
|
|
|
|
YL.extend(Y.StorageEngineSWF, Y.StorageEngineKeyed, {
|
|
|
/**
|
|
|
* The underlying SWF of the engine, exposed so developers can modify the adapter behavior.
|
|
|
* @property _swf
|
|
|
* @type {Object}
|
|
|
* @protected
|
|
|
*/
|
|
|
_swf: null,
|
|
|
|
|
|
/*
|
|
|
* Implementation to clear the values from the storage engine.
|
|
|
* @see YAHOO.util.Storage._clear
|
|
|
*/
|
|
|
_clear: function() {
|
|
|
for (var i = this._keys.length - 1; 0 <= i; i -= 1) {
|
|
|
var key = this._keys[i];
|
|
|
_engine.callSWF("removeItem", [key]);
|
|
|
}
|
|
|
|
|
|
this._keys = [];
|
|
|
this.length = 0;
|
|
|
},
|
|
|
|
|
|
/*
|
|
|
* Implementation to fetch an item from the storage engine.
|
|
|
* @see YAHOO.util.Storage._getItem
|
|
|
*/
|
|
|
_getItem: function(key) {
|
|
|
var _key = _getKey(this, key);
|
|
|
return _engine.callSWF("getValueOf", [_key]);
|
|
|
},
|
|
|
|
|
|
/*
|
|
|
* Implementation to fetch a key from the storage engine.
|
|
|
* @see YAHOO.util.Storage.key
|
|
|
*/
|
|
|
_key: function(index) {
|
|
|
return (this._keys[index] || '').replace(/^.*?__/, '');
|
|
|
},
|
|
|
|
|
|
/*
|
|
|
* Implementation to remove an item from the storage engine.
|
|
|
* @see YAHOO.util.Storage._removeItem
|
|
|
*/
|
|
|
_removeItem: function(key) {
|
|
|
var _key = _getKey(this, key);
|
|
|
_engine.callSWF("removeItem", [_key]);
|
|
|
this._removeKey(_key);
|
|
|
},
|
|
|
|
|
|
/*
|
|
|
* Implementation to remove an item from the storage engine.
|
|
|
* @see YAHOO.util.Storage._setItem
|
|
|
*/
|
|
|
_setItem: function(key, data) {
|
|
|
var _key = _getKey(this, key), swfNode;
|
|
|
|
|
|
// setting the value returns false if the value didn't change,
|
|
|
// so I changed this to clear the key if it exists so that the
|
|
|
// fork below works.
|
|
|
if (_engine.callSWF("getValueOf", [_key])) {
|
|
|
this._removeItem(key);
|
|
|
}
|
|
|
|
|
|
this._addKey(_key);
|
|
|
|
|
|
if (_engine.callSWF("setItem", [_key, data])) {
|
|
|
return true;
|
|
|
} else {
|
|
|
|
|
|
// @TODO we should not assume that a false return means that
|
|
|
// the quota has been exceeded. this dialog should only be
|
|
|
// displayed if the quotaExceededError event fired.
|
|
|
swfNode = YD.get(_engine._id);
|
|
|
if (MINIMUM_WIDTH > YD.getStyle(swfNode, 'width').replace(/\D+/g, '')) {
|
|
|
YD.setStyle(swfNode, 'width', MINIMUM_WIDTH + 'px');
|
|
|
}
|
|
|
if (MINIMUM_HEIGHT > YD.getStyle(swfNode, 'height').replace(/\D+/g, '')) {
|
|
|
YD.setStyle(swfNode, 'height', MINIMUM_HEIGHT + 'px');
|
|
|
}
|
|
|
return _engine.callSWF("displaySettings", []);
|
|
|
}
|
|
|
}
|
|
|
});
|
|
|
|
|
|
Y.StorageEngineSWF.SWFURL = "swfstore.swf";
|
|
|
Y.StorageEngineSWF.ENGINE_NAME = 'swf';
|
|
|
Y.StorageEngineSWF.isAvailable = function() {
|
|
|
return (6 <= YAHOO.env.ua.flash && YAHOO.widget.SWF);
|
|
|
};
|
|
|
Y.StorageManager.register(Y.StorageEngineSWF);
|
|
|
}());
|
|
|
YAHOO.register("storage", YAHOO.util.Storage, {version: "2.8.0r4", build: "2449"});
|
|
|
|
