source: trunk/web/addons/job_monarch/lib/extjs/air/src/FileProvider.js @ 619

/*
 * Ext JS Library 0.30
 * Copyright(c) 2006-2009, Ext JS, LLC.
 * licensing@extjs.com
 * 
 * http://extjs.com/license
 */

/**
 * @class Ext.air.FileProvider
 * @extends Ext.state.Provider
 * 
 * An Ext state provider implementation for Adobe AIR that stores state in the application 
 * storage directory.
 * 
 * @constructor
 * @param {Object} config
 */
Ext.air.FileProvider = function(config){
    Ext.air.FileProvider.superclass.constructor.call(this);
        
        this.defaultState = {
                mainWindow : {
                        width:780,
                        height:580,
                        x:10,
                        y:10
                }
        };
        
    Ext.apply(this, config);
    this.state = this.readState();
        
        var provider = this;
        air.NativeApplication.nativeApplication.addEventListener('exiting', function(){
                provider.saveState();
        });
};

Ext.extend(Ext.air.FileProvider, Ext.state.Provider, {
        /**
         * @cfg {String} file
         * The file name to use for the state file in the application storage directory
         */
        file: 'extstate.data',
        
        /**
         * @cfg {Object} defaultState
         * The default state if no state file can be found
         */
        // private
    readState : function(){
                var stateFile = air.File.applicationStorageDirectory.resolvePath(this.file);
                if(!stateFile.exists){
                        return this.defaultState || {};
                }
                
                var stream = new air.FileStream();
                stream.open(stateFile, air.FileMode.READ);
                
                var stateData = stream.readObject();
                stream.close();
                
                return stateData || this.defaultState || {};
    },

    // private
    saveState : function(name, value){
        var stateFile = air.File.applicationStorageDirectory.resolvePath(this.file);
                var stream = new air.FileStream();
                stream.open(stateFile, air.FileMode.WRITE);
                stream.writeObject(this.state);
                stream.close();
    }
});