src : refactor _filter

jquery.isotope.js

@@ -493,33 +493,27 @@
     // ====================== Filtering ======================
 
     _filter : function( $atoms ) {
-      var $filteredAtoms,
+      var filter = this.options.filter === '' ? '*' : this.options.filter;
-          filter = this.options.filter === '' ? '*' : this.options.filter;
 
       if ( !filter ) {
-        $filteredAtoms = $atoms;
+        return $atoms;
-      } else {
+      }
+
       var hiddenClass    = this.options.hiddenClass,
           hiddenSelector = '.' + hiddenClass,
-            $visibleAtoms  = $atoms.not( hiddenSelector ),
           $hiddenAtoms   = $atoms.filter( hiddenSelector ),
           $atomsToShow   = $hiddenAtoms;
 
-        $filteredAtoms = $atoms.filter( filter );
-
       if ( filter !== '*' ) {
         $atomsToShow = $hiddenAtoms.filter( filter );
-
+        var $atomsToHide = $atoms.not( hiddenSelector ).not( filter ).addClass( hiddenClass );
-          var $atomsToHide = $visibleAtoms.not( filter ).toggleClass( hiddenClass );
-          $atomsToHide.addClass( hiddenClass );
         this.styleQueue.push({ $el: $atomsToHide, style: this.options.hiddenStyle });
       }
 
       this.styleQueue.push({ $el: $atomsToShow, style: this.options.visibleStyle });
       $atomsToShow.removeClass( hiddenClass );
-      }
 
-      return $filteredAtoms;
+      return $atoms.filter( filter );
     },
     
     // ====================== Sorting ======================