source: Dev/trunk/src/client/dojox/data/CssClassStore.js @ 532

define(["dojo/_base/declare","dojox/data/CssRuleStore"], 
  function(declare, CssRuleStore) {

return declare("dojox.data.CssClassStore", CssRuleStore, {
        // summary:
        //              Basic store to display CSS information.
        // description:
        //              The CssClassStore allows users to get information about active Css classes in the page running the CssClassStore.
        //              It can also filter out classes from specific stylesheets.  The attributes it exposes on classes are as follows:
        //
        //              - class:                The classname, including the '.'.
        //              - classSans:    The classname without the '.'.

        // _labelAttribute:
        //              text representation of the Item [label and identifier may need to stay due to method names]
        _labelAttribute: 'class',
        
        _idAttribute: 'class',
        _cName: "dojox.data.CssClassStore",

        getFeatures: function(){
                // summary:
                //              See dojo/data/api/Read.getFeatures()
                return {
                        "dojo.data.api.Read" : true,
                        "dojo.data.api.Identity" : true
                };
        },

        getAttributes: function(item){
                // summary:
                //              See dojo/data/api/Read.getAttributes()
                this._assertIsItem(item);
                return ['class', 'classSans'];
        },

        getValue: function(item, attribute, defaultValue){
                // summary:
                //              See dojo/data/api/Read.getValue()
                var values = this.getValues(item, attribute);
                if(values && values.length > 0){
                        return values[0];
                }
                return defaultValue;
        },

        getValues: function(item, attribute){
                // summary:
                //              See dojo/data/api/Read.getValues()
                this._assertIsItem(item);
                this._assertIsAttribute(attribute);
                var value = [];
                if(attribute === "class"){
                        value = [item.className];
                }else if(attribute === "classSans"){
                        value = [item.className.replace(/\./g,'')];
                }
                return value;
        },

        _handleRule: function(rule, styleSheet, href){
                // summary:
                //              Handles the creation of an item based on the passed rule.  In this store, this implies
                //              parsing out all available class names.
                var obj = {};
                var s = rule['selectorText'].split(" ");
                for(var j=0; j<s.length; j++){
                        var tmp = s[j];
                        var first = tmp.indexOf('.');
                        if(tmp && tmp.length > 0 && first !== -1){
                                var last = tmp.indexOf(',') || tmp.indexOf('[');
                                tmp = tmp.substring(first, ((last !== -1 && last > first)?last:tmp.length));
                                obj[tmp] = true;
                        }
                }
                for(var key in obj){
                        if(!this._allItems[key]){
                                var item = {};
                                item.className = key;
                                item[this._storeRef] = this;
                                this._allItems[key] = item;
                        }
                }
        },

        _handleReturn: function(){
                // summary:
                //              Handles the return from a fetching action.  Delegates requests to act on the resulting
                //              item set to eitehr the _handleFetchReturn or _handleFetchByIdentityReturn depending on
                //              where the request originated.
                var _inProgress = [];
                
                var items = {};
                for(var i in this._allItems){
                        items[i] = this._allItems[i];
                }
                var requestInfo;
                // One-level deep clone (can't use dojo.clone, since we don't want to clone all those store refs!)
                while(this._pending.length){
                        requestInfo = this._pending.pop();
                        requestInfo.request._items = items;
                        _inProgress.push(requestInfo);
                }

                while(_inProgress.length){
                        requestInfo = _inProgress.pop();
                        if(requestInfo.fetch){
                                this._handleFetchReturn(requestInfo.request);
                        }else{
                                this._handleFetchByIdentityReturn(requestInfo.request);
                        }
                }
        },

        _handleFetchByIdentityReturn: function(request){
                // summary:
                //              Handles a fetchByIdentity request by finding the correct item.
                var items = request._items;
                // Per https://bugs.webkit.org/show_bug.cgi?id=17935 , Safari 3.x always returns the selectorText
                // of a rule in full lowercase.
                var item = items[request.identity];
                if(!this.isItem(item)){
                        item = null;
                }
                if(request.onItem){
                        var scope = request.scope || dojo.global;
                        request.onItem.call(scope, item);
                }
        },

        /* Identity API */
        getIdentity: function(/* item */ item){
                // summary:
                //              See dojo/data/api/Identity.getIdentity()
                this._assertIsItem(item);
                return this.getValue(item, this._idAttribute);
        },

        getIdentityAttributes: function(/* item */ item){
                // summary:
                //              See dojo/data/api/Identity.getIdentityAttributes()
                this._assertIsItem(item);
                return [this._idAttribute];
        },

        fetchItemByIdentity: function(/* request */ request){
                // summary:
                //              See dojo/data/api/Identity.fetchItemByIdentity()
                request = request || {};
                if(!request.store){
                        request.store = this;
                }
                if(this._pending && this._pending.length > 0){
                        this._pending.push({request: request});
                }else{
                        this._pending = [{request: request}];
                        this._fetch(request);
                }
                return request;
        }
});

});