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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 */
#ifndef __mozilla_layers_TouchActionHelper_h__
#define __mozilla_layers_TouchActionHelper_h__
#include "mozilla/layers/LayersTypes.h" // for TouchBehaviorFlags
#include "RelativeTo.h" // for RelativeTo
class nsIWidget;
namespace mozilla {
namespace dom {
class Document;
} // namespace dom
class WidgetTouchEvent;
} // namespace mozilla
namespace mozilla::layers {
* Helper class to figure out the allowed touch behavior for frames, as per
* the touch-action spec.
class TouchActionHelper {
* Performs hit testing on content, finds frame that corresponds to the touch
* points of aEvent and retrieves touch-action CSS property value from it
* according the rules specified in the spec:
static nsTArray<TouchBehaviorFlags> GetAllowedTouchBehavior(
nsIWidget* aWidget, dom::Document* aDocument,
const WidgetTouchEvent& aPoint);
static TouchBehaviorFlags GetAllowedTouchBehaviorForFrame(nsIFrame* aFrame);
} // namespace mozilla::layers
#endif /*__mozilla_layers_TouchActionHelper_h__ */