/*!
 * Ext JS Library 3.2.1
 * Copyright(c) 2006-2010 Ext JS, Inc.
 * licensing@extjs.com
 * http://www.extjs.com/license
 */
/** * @class Ext.state.Provider * Abstract base class for state provider implementations. This class provides methods * for encoding and decoding typed variables including dates and defines the * Provider interface. */ Ext.state.Provider = function(){
/** * @event statechange * Fires when a state change occurs. * @param {Provider} this This state provider * @param {String} key The state key which was changed * @param {String} value The encoded value for the state */ this.addEvents("statechange"); this.state = {}; Ext.state.Provider.superclass.constructor.call(this); }; Ext.extend(Ext.state.Provider, Ext.util.Observable, {
/** * Returns the current value for a key * @param {String} name The key name * @param {Mixed} defaultValue A default value to return if the key's value is not found * @return {Mixed} The state data */ get : function(name, defaultValue){ return typeof this.state[name] == "undefined" ? defaultValue : this.state[name]; },
/** * Clears a value from the state * @param {String} name The key name */ clear : function(name){ delete this.state[name]; this.fireEvent("statechange", this, name, null); },
/** * Sets the value for a key * @param {String} name The key name * @param {Mixed} value The value to set */ set : function(name, value){ this.state[name] = value; this.fireEvent("statechange", this, name, value); },
/** * Decodes a string previously encoded with {@link #encodeValue}. * @param {String} value The value to decode * @return {Mixed} The decoded value */ decodeValue : function(cookie){ var re = /^(a|n|d|b|s|o)\:(.*)$/; var matches = re.exec(unescape(cookie)); if(!matches || !matches[1]) return; // non state cookie var type = matches[1]; var v = matches[2]; switch(type){ case "n": return parseFloat(v); case "d": return new Date(Date.parse(v)); case "b": return (v == "1"); case "a": var all = []; if(v != ''){ Ext.each(v.split('^'), function(val){ all.push(this.decodeValue(val)); }, this); } return all; case "o": var all = {}; if(v != ''){ Ext.each(v.split('^'), function(val){ var kv = val.split('='); all[kv[0]] = this.decodeValue(kv[1]); }, this); } return all; default: return v; } },
/** * Encodes a value including type information. Decode with {@link #decodeValue}. * @param {Mixed} value The value to encode * @return {String} The encoded value */ encodeValue : function(v){ var enc; if(typeof v == "number"){ enc = "n:" + v; }else if(typeof v == "boolean"){ enc = "b:" + (v ? "1" : "0"); }else if(Ext.isDate(v)){ enc = "d:" + v.toGMTString(); }else if(Ext.isArray(v)){ var flat = ""; for(var i = 0, len = v.length; i < len; i++){ flat += this.encodeValue(v[i]); if(i != len-1) flat += "^"; } enc = "a:" + flat; }else if(typeof v == "object"){ var flat = ""; for(var key in v){ if(typeof v[key] != "function" && v[key] !== undefined){ flat += key + "=" + this.encodeValue(v[key]) + "^"; } } enc = "o:" + flat.substring(0, flat.length-1); }else{ enc = "s:" + v; } return escape(enc); } });