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