2 * Ext JS Library 2.2.1
\r
3 * Copyright(c) 2006-2009, Ext JS, LLC.
\r
4 * licensing@extjs.com
\r
6 * http://extjs.com/license
\r
10 * @class Ext.state.Provider
\r
11 * Abstract base class for state provider implementations. This class provides methods
\r
12 * for encoding and decoding <b>typed</b> variables including dates and defines the
\r
13 * Provider interface.
\r
15 Ext.state.Provider = function(){
\r
17 * @event statechange
\r
18 * Fires when a state change occurs.
\r
19 * @param {Provider} this This state provider
\r
20 * @param {String} key The state key which was changed
\r
21 * @param {String} value The encoded value for the state
\r
23 this.addEvents("statechange");
\r
25 Ext.state.Provider.superclass.constructor.call(this);
\r
27 Ext.extend(Ext.state.Provider, Ext.util.Observable, {
\r
29 * Returns the current value for a key
\r
30 * @param {String} name The key name
\r
31 * @param {Mixed} defaultValue A default value to return if the key's value is not found
\r
32 * @return {Mixed} The state data
\r
34 get : function(name, defaultValue){
\r
35 return typeof this.state[name] == "undefined" ?
\r
36 defaultValue : this.state[name];
\r
40 * Clears a value from the state
\r
41 * @param {String} name The key name
\r
43 clear : function(name){
\r
44 delete this.state[name];
\r
45 this.fireEvent("statechange", this, name, null);
\r
49 * Sets the value for a key
\r
50 * @param {String} name The key name
\r
51 * @param {Mixed} value The value to set
\r
53 set : function(name, value){
\r
54 this.state[name] = value;
\r
55 this.fireEvent("statechange", this, name, value);
\r
59 * Decodes a string previously encoded with {@link #encodeValue}.
\r
60 * @param {String} value The value to decode
\r
61 * @return {Mixed} The decoded value
\r
63 decodeValue : function(cookie){
\r
64 var re = /^(a|n|d|b|s|o)\:(.*)$/;
\r
65 var matches = re.exec(unescape(cookie));
\r
66 if(!matches || !matches[1]) return; // non state cookie
\r
67 var type = matches[1];
\r
71 return parseFloat(v);
\r
73 return new Date(Date.parse(v));
\r
78 var values = v.split("^");
\r
79 for(var i = 0, len = values.length; i < len; i++){
\r
80 all.push(this.decodeValue(values[i]));
\r
85 var values = v.split("^");
\r
86 for(var i = 0, len = values.length; i < len; i++){
\r
87 var kv = values[i].split("=");
\r
88 all[kv[0]] = this.decodeValue(kv[1]);
\r
97 * Encodes a value including type information. Decode with {@link #decodeValue}.
\r
98 * @param {Mixed} value The value to encode
\r
99 * @return {String} The encoded value
\r
101 encodeValue : function(v){
\r
103 if(typeof v == "number"){
\r
105 }else if(typeof v == "boolean"){
\r
106 enc = "b:" + (v ? "1" : "0");
\r
107 }else if(Ext.isDate(v)){
\r
108 enc = "d:" + v.toGMTString();
\r
109 }else if(Ext.isArray(v)){
\r
111 for(var i = 0, len = v.length; i < len; i++){
\r
112 flat += this.encodeValue(v[i]);
\r
113 if(i != len-1) flat += "^";
\r
116 }else if(typeof v == "object"){
\r
119 if(typeof v[key] != "function" && v[key] !== undefined){
\r
120 flat += key + "=" + this.encodeValue(v[key]) + "^";
\r
123 enc = "o:" + flat.substring(0, flat.length-1);
\r
127 return escape(enc);
\r