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/***************************************************************
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* Copyright notice
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*
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* (c) 2010-2011 Steffen Kamper <steffen@typo3.org>
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* All rights reserved
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*
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* This script is part of the TYPO3 project. The TYPO3 project is
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* free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* The GNU General Public License can be found at
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* http://www.gnu.org/copyleft/gpl.html.
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* A copy is found in the textfile GPL.txt and important notices to the license
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* from the author is found in LICENSE.txt distributed with these scripts.
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*
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*
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* This script is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* This copyright notice MUST APPEAR in all copies of the script!
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***************************************************************/
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Ext.ns('TYPO3.state');
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/**
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* Creates new ExtDirectProvider
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* @constructor
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* @param {Object} config Configuration object
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* @author Jozef Sakalos
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* @author Steffen Kamper
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*/
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TYPO3.state.ExtDirectProvider = function(config) {
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this.addEvents(
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/**
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* @event readsuccess
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* Fires after state has been successfully received from server and restored
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* @param {HttpProvider} this
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*/
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'readsuccess',
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/**
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* @event readfailure
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* Fires in the case of an error when attempting to read state from server
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* @param {HttpProvider} this
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*/
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'readfailure',
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/**
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* @event savesuccess
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* Fires after the state has been successfully saved to server
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* @param {HttpProvider} this
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*/
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'savesuccess',
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/**
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* @event savefailure
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* Fires in the case of an error when attempting to save state to the server
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* @param {HttpProvider} this
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*/
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'savefailure'
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);
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// call parent
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TYPO3.state.ExtDirectProvider.superclass.constructor.call(this);
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Ext.apply(this, config, {
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// defaults
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delay: 750, // buffer changes for 750 ms
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dirty: false,
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started: false,
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autoStart: true,
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autoRead: true,
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key: 'States.General',
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logFailure: false,
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logSuccess: false,
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queue: [],
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saveBaseParams: {},
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readBaseParams: {},
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paramNames:{
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key: 'key',
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name: 'name',
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value: 'value',
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data: 'data'
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}
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});
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if (this.autoRead) {
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this.readState();
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}
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this.dt = new Ext.util.DelayedTask(this.submitState, this);
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if (this.autoStart) {
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this.start();
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}
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};
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Ext.extend(TYPO3.state.ExtDirectProvider, Ext.state.Provider, {
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// localizable texts
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saveSuccessText: 'Save Success',
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saveFailureText: 'Save Failure',
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readSuccessText: 'Read Success',
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readFailureText: 'Read Failure',
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dataErrorText: 'Data Error',
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/**
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* Initializes state from the passed state object or array.
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* Use this with loading page using initial state in TYPO3.settings
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*
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* @param {Array/Object} state State to initialize state manager with
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*/
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initState: function(state) {
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if (Ext.isArray(state)) {
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Ext.each(state, function(item) {
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this.state[item.name] = this.decodeValue(item[this.paramNames.value]);
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}, this);
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} else if (Ext.isObject(state)) {
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Ext.iterate(state, function(key, value){
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this.state[key] = this.decodeValue(value);
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}, this);
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} else {
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this.state = {};
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}
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},
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/**
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* Sets the passed state variable name to the passed value and queues the change
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* @param {String} name Name of the state variable
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* @param {Mixed} value Value of the state variable
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*/
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set: function(name, value) {
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if (!name) {
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return;
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}
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this.queueChange(name, value);
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},
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/**
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* Starts submitting state changes to server
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*/
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start: function() {
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this.dt.delay(this.delay);
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this.started = true;
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},
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/**
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* Stops submitting state changes
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*/
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stop: function() {
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this.dt.cancel();
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this.started = false;
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},
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/**
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* private, queues the state change if state has changed
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*/
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queueChange: function(name, value) {
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var o = {};
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var i;
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var found = false;
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var lastValue = this.state[name];
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for (i = 0; i < this.queue.length; i++) {
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if (this.queue[i].name === name) {
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lastValue = this.decodeValue(this.queue[i].value);
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}
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}
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var changed = undefined === lastValue || lastValue !== value;
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if (changed) {
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o[this.paramNames.name] = name;
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o[this.paramNames.value] = this.encodeValue(value);
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for (i = 0; i < this.queue.length; i++) {
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if (this.queue[i].name === o.name) {
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this.queue[i] = o;
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found = true;
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}
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}
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if (false === found) {
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this.queue.push(o);
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}
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this.dirty = true;
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}
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if (this.started) {
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this.start();
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}
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return changed;
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},
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/**
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* private, submits state to server by asynchronous Ajax request
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*/
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submitState: function() {
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if (!this.dirty) {
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this.dt.delay(this.delay);
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return;
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}
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this.dt.cancel();
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var o = {
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scope: this,
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success: this.onSaveSuccess,
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failure: this.onSaveFailure,
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queue: this.queue, //this.clone(this.queue),
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params: {}
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};
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var params = Ext.apply({}, this.saveBaseParams);
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params[this.paramNames.key] = this.key;
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params[this.paramNames.data] = Ext.encode(o.queue);
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Ext.apply(o.params, params);
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// be optimistic
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this.dirty = false;
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TYPO3.ExtDirectStateProvider.ExtDirect.setState(o, function(response, options) {
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if (response.success) {
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this.onSaveSuccess(response, options);
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} else {
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this.onSaveFailure(response, options);
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}
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}, this);
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},
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/**
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* Clears the state variable
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* @param {String} name Name of the variable to clear
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*/
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clear: function(name) {
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this.set(name, undefined);
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},
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/**
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* private, save success callback
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*/
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onSaveSuccess: function(response, options) {
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var o = response;
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if (!o.success) {
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if (this.logFailure) {
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this.log(this.saveFailureText, o, response);
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}
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this.dirty = true;
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} else {
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Ext.each(response.params.queue, function(item) {
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if (!item) {
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return;
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}
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var name = item[this.paramNames.name];
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var value = this.decodeValue(item[this.paramNames.value]);
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if (value === undefined || value === null) {
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TYPO3.state.ExtDirectProvider.superclass.clear.call(this, name);
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} else {
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// parent sets value and fires event
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TYPO3.state.ExtDirectProvider.superclass.set.call(this, name, value);
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}
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}, this);
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if (!this.dirty) {
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this.queue = [];
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}else {
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var i, j, found;
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for (i = 0; i < response.params.queue.length; i++) {
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found = false;
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for (j = 0; j < this.queue.length; j++) {
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if (response.params.queue[i].name === this.queue[j].name) {
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found = true;
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break;
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}
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}
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if (found && this.encodeValue(response.params.queue[i].value) === this.encodeValue(this.queue[j].value)) {
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this.queue.remove(this.queue[j]);
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}
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}
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}
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if (this.logSuccess) {
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this.log(this.saveSuccessText, o, response);
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}
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this.fireEvent('savesuccess', this);
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}
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},
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/**
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* private, save failure callback
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*/
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onSaveFailure: function(response, options) {
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if (true === this.logFailure) {
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this.log(this.saveFailureText, response);
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}
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this.dirty = true;
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this.fireEvent('savefailure', this);
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},
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/**
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* private, read state callback
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*/
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onReadFailure: function(response, options) {
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if (this.logFailure) {
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this.log(this.readFailureText, response);
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}
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this.fireEvent('readfailure', this);
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},
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/**
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* private, read success callback
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*/
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onReadSuccess: function(response, options) {
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var o = response, data;
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if (!o.success) {
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if (this.logFailure) {
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this.log(this.readFailureText, o, response);
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}
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} else {
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data = o[this.paramNames.data];
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Ext.iterate(data, function(key, value) {
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this.state[key] = this.decodeValue(value);
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}, this);
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this.queue = [];
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this.dirty = false;
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if (this.logSuccess) {
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this.log(this.readSuccessText, data, response);
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}
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this.fireEvent('readsuccess', this);
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}
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},
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/**
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* Reads saved state from server by sending asynchronous Ajax request and processing the response
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*/
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readState: function() {
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var o = {
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scope: this,
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params:{}
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};
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var params = Ext.apply({}, this.readBaseParams);
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params[this.paramNames.key] = this.key;
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Ext.apply(o.params, params);
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TYPO3.ExtDirectStateProvider.ExtDirect.getState(o, function(response, options) {
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if (response.success) {
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this.onReadSuccess(response, options);
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} else {
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this.onReadFailure(response, options);
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}
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}, this);
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},
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/**
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* private, logs errors or successes
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*/
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log: function() {
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if (console) {
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console.log.apply(console, arguments);
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}
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},
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logState: function() {
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if (console) {
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console.log(this.state);
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}
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}
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});
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