michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef __mozilla_widget_ContentHelper_h__
michael@0: #define __mozilla_widget_ContentHelper_h__
michael@0: 
michael@0: #include "nsIFrame.h"
michael@0: #include "nsIWidget.h"
michael@0: #include "mozilla/layers/APZCTreeManager.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace widget {
michael@0: 
michael@0: /*
michael@0:  * Allow different platform widgets to access Content/DOM stuff.
michael@0:  */
michael@0: class ContentHelper
michael@0: {
michael@0:   typedef mozilla::layers::AllowedTouchBehavior AllowedTouchBehavior;
michael@0:   typedef uint32_t TouchBehaviorFlags;
michael@0: 
michael@0: private:
michael@0:   static uint32_t GetTouchActionFromFrame(nsIFrame* aFrame);
michael@0:   static void UpdateAllowedBehavior(uint32_t aTouchActionValue, bool aConsiderPanning, TouchBehaviorFlags& aOutBehavior);
michael@0: 
michael@0: public:
michael@0:   /*
michael@0:    * Performs hit testing on content, finds frame that corresponds to the aPoint and retrieves
michael@0:    * touch-action css property value from it according the rules specified in the spec:
michael@0:    * http://www.w3.org/TR/pointerevents/#the-touch-action-css-property.
michael@0:    */
michael@0:   static TouchBehaviorFlags GetAllowedTouchBehavior(nsIWidget* aWidget, const nsIntPoint& aPoint);
michael@0: };
michael@0: 
michael@0: }
michael@0: }
michael@0: 
michael@0: #endif /*__mozilla_widget_ContentHelper_h__ */