Roll Polymer

third_party/polymer/v1_0/components-chromium/iron-menu-behavior/iron-menu-behavior-extracted.js

 /**
    * `Polymer.IronMenuBehavior` implements accessible menu behavior.
    *
    * @demo demo/index.html
    * @polymerBehavior Polymer.IronMenuBehavior
    */
   Polymer.IronMenuBehaviorImpl = {
 
     properties: {
 
@@ skipping 110 matching lines @@
     },
 
     /**
      * Focuses the previous item (relative to the currently focused item) in the
      * menu, disabled items will be skipped.
      * Loop until length + 1 to handle case of single item in menu.
      */
     _focusPrevious: function() {
       var length = this.items.length;
       var curFocusIndex = Number(this.indexOf(this.focusedItem));
+
       for (var i = 1; i < length + 1; i++) {
         var item = this.items[(curFocusIndex - i + length) % length];
         if (!item.hasAttribute('disabled')) {
+          var owner = Polymer.dom(item).getOwnerRoot() || document;
           this._setFocusedItem(item);
-          return;
+
+          // Focus might not have worked, if the element was hidden or not
+          // focusable. In that case, try again.
+          if (Polymer.dom(owner).activeElement == item) {
+            return;
+          }
         }
       }
     },
 
     /**
      * Focuses the next item (relative to the currently focused item) in the
      * menu, disabled items will be skipped.
      * Loop until length + 1 to handle case of single item in menu.
      */
     _focusNext: function() {
       var length = this.items.length;
       var curFocusIndex = Number(this.indexOf(this.focusedItem));
+
       for (var i = 1; i < length + 1; i++) {
         var item = this.items[(curFocusIndex + i) % length];
         if (!item.hasAttribute('disabled')) {
+          var owner = Polymer.dom(item).getOwnerRoot() || document;
           this._setFocusedItem(item);
-          return;
+
+          // Focus might not have worked, if the element was hidden or not
+          // focusable. In that case, try again.
+          if (Polymer.dom(owner).activeElement == item) {
+            return;
+          }
         }
       }
     },
 
     /**
      * Mutates items in the menu based on provided selection details, so that
      * all items correctly reflect selection state.
      *
      * @param {Element} item An item in the menu.
      * @param {boolean} isSelected True if the item should be shown in a
@@ skipping 146 matching lines @@
   };
 
   Polymer.IronMenuBehaviorImpl._shiftTabPressed = false;
 
   /** @polymerBehavior Polymer.IronMenuBehavior */
   Polymer.IronMenuBehavior = [
     Polymer.IronMultiSelectableBehavior,
     Polymer.IronA11yKeysBehavior,
     Polymer.IronMenuBehaviorImpl
   ];