    /**
     * @class Ext.state.CookieProvider
     * @extends Ext.state.Provider
     * A Provider implementation which saves and retrieves state via cookies.
     * The CookieProvider supports the usual cookie options, such as:
     * <ul>
     * <li>{@link #path}</li>
     * <li>{@link #expires}</li>
     * <li>{@link #domain}</li>
     * <li>{@link #secure}</li>
     * </ul>
     <pre><code>
       var cp = new Ext.state.CookieProvider({
           path: "/cgi-bin/",
           expires: new Date(new Date().getTime()+(1000*60*60*24*30)), //30 days
           domain: "sencha.com"
       });
       Ext.state.Manager.setProvider(cp);
     </code></pre>

     * @cfg {String} path The path for which the cookie is active (defaults to root '/' which makes it active for all pages in the site)
     * @cfg {Date} expires The cookie expiration date (defaults to 7 days from now)
     * @cfg {String} domain The domain to save the cookie for.  Note that you cannot specify a different domain than
     * your page is on, but you can specify a sub-domain, or simply the domain itself like 'sencha.com' to include
     * all sub-domains if you need to access cookies across different sub-domains (defaults to null which uses the same
     * domain the page is running on including the 'www' like 'www.sencha.com')
     * @cfg {Boolean} secure True if the site is using SSL (defaults to false)
     */
    Ext.define('Ext.state.CookieProvider', {
        extend: 'Ext.state.Provider',

        /**
         * Creates a new CookieProvider.
         * @param {Object} config (optional) Config object.
         */
        constructor : function(config){
            var me = this;
            me.path = "/";
            me.expires = new Date(new Date().getTime()+(1000*60*60*24*7)); //7 days
            me.domain = null;
            me.secure = false;
            me.callParent(arguments);
            me.state = me.readCookies();
        },

        // private
        set : function(name, value){
            var me = this;

            if(typeof value == "undefined" || value === null){
                me.clear(name);
                return;
            }
            me.setCookie(name, value);
            me.callParent(arguments);
        },

        // private
        clear : function(name){
            this.clearCookie(name);
            this.callParent(arguments);
        },

        // private
        readCookies : function(){
            var cookies = {},
                c = document.cookie + ";",
                re = /\s?(.*?)=(.*?);/g,
                prefix = this.prefix,
                len = prefix.length,
                matches,
                name,
                value;

            while((matches = re.exec(c)) != null){
                name = matches[1];
                value = matches[2];
                if (name && name.substring(0, len) == prefix){
                    cookies[name.substr(len)] = this.decodeValue(value);
                }
            }
            return cookies;
        },

        // private
        setCookie : function(name, value){
            var me = this;

            document.cookie = me.prefix + name + "=" + me.encodeValue(value) +
               ((me.expires == null) ? "" : ("; expires=" + me.expires.toGMTString())) +
               ((me.path == null) ? "" : ("; path=" + me.path)) +
               ((me.domain == null) ? "" : ("; domain=" + me.domain)) +
               ((me.secure == true) ? "; secure" : "");
        },

        // private
        clearCookie : function(name){
            var me = this;

            document.cookie = me.prefix + name + "=null; expires=Thu, 01-Jan-70 00:00:01 GMT" +
               ((me.path == null) ? "" : ("; path=" + me.path)) +
               ((me.domain == null) ? "" : ("; domain=" + me.domain)) +
               ((me.secure == true) ? "; secure" : "");
        }
    });