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- /*
- * Ext JS Library 2.0 Copyright(c) 2006-2007, Ext JS, LLC. licensing@extjs.com
- *
- * http://extjs.com/license
- */
- /**
- * @class Ext.state.Provider Abstract base class for state provider
- * implementations. This class provides methods for encoding and decoding
- * <b>typed</b> 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;
- // console.log(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 = [];
- var values = v.split("^");
- for (var i = 0, len = values.length; i < len; i++) {
- all.push(this.decodeValue(values[i]));
- }
- return all;
- case "o" :
- var all = {};
- var values = v.split("^");
- for (var i = 0, len = values.length; i < len; i++) {
- var kv = values[i].split("=");
- all[kv[0]] = this.decodeValue(kv[1]);
- }
- 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 (v instanceof Date) {
- enc = "d:" + v.toGMTString();
- } else if (v instanceof Array) {
- 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);
- }
- });
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