X-Git-Url: http://git.ithinksw.org/extjs.git/blobdiff_plain/0494b8d9b9bb03ab6c22b34dae81261e3cd7e3e6..7a654f8d43fdb43d78b63d90528bed6e86b608cc:/docs/source/Provider1.html
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-
-
-
- The source code
-
-
-
-
- /*!
- * Ext JS Library 3.3.1
- * Copyright(c) 2006-2010 Sencha Inc.
- * licensing@sencha.com
- * http://www.sencha.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 = Ext.extend(Ext.util.Observable, {
-
- constructor : 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);
- },
-
- /**
- * 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){
- /**
- * a -> Array
- * n -> Number
- * d -> Date
- * b -> Boolean
- * s -> String
- * o -> Object
- * -> Empty (null)
- */
- var re = /^(a|n|d|b|s|o|e)\:(.*)$/,
- matches = re.exec(unescape(cookie)),
- all,
- type,
- v,
- kv;
- if(!matches || !matches[1]){
- return; // non state cookie
- }
- type = matches[1];
- v = matches[2];
- switch(type){
- case 'e':
- return null;
- case 'n':
- return parseFloat(v);
- case 'd':
- return new Date(Date.parse(v));
- case 'b':
- return (v == '1');
- case 'a':
- all = [];
- if(v != ''){
- Ext.each(v.split('^'), function(val){
- all.push(this.decodeValue(val));
- }, this);
- }
- return all;
- case 'o':
- all = {};
- if(v != ''){
- Ext.each(v.split('^'), function(val){
- 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,
- flat = '',
- i = 0,
- len,
- key;
- if(v == null){
- return 'e:1';
- }else 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)){
- for(len = v.length; i < len; i++){
- flat += this.encodeValue(v[i]);
- if(i != len - 1){
- flat += '^';
- }
- }
- enc = 'a:' + flat;
- }else if(typeof v == 'object'){
- for(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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