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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_layers_APZEventState_h
#define mozilla_layers_APZEventState_h
#include <stdint.h>
#include "FrameMetrics.h" // for ScrollableLayerGuid
#include "Units.h"
#include "mozilla/EventForwards.h"
#include "mozilla/Function.h"
#include "mozilla/layers/GeckoContentController.h" // for APZStateChange
#include "mozilla/RefPtr.h"
#include "nsCOMPtr.h"
#include "nsISupportsImpl.h" // for NS_INLINE_DECL_REFCOUNTING
#include "nsIWeakReferenceUtils.h" // for nsWeakPtr
template <class> class nsCOMPtr;
class nsIDocument;
class nsIPresShell;
class nsIWidget;
namespace mozilla {
namespace layers {
class ActiveElementManager;
typedef function<void(const ScrollableLayerGuid&,
uint64_t /* input block id */,
bool /* prevent default */)>
ContentReceivedInputBlockCallback;
/**
* A content-side component that keeps track of state for handling APZ
* gestures and sending APZ notifications.
*/
class APZEventState {
typedef GeckoContentController::APZStateChange APZStateChange;
typedef FrameMetrics::ViewID ViewID;
public:
APZEventState(nsIWidget* aWidget,
ContentReceivedInputBlockCallback&& aCallback);
NS_INLINE_DECL_REFCOUNTING(APZEventState);
void ProcessSingleTap(const CSSPoint& aPoint,
const CSSToLayoutDeviceScale& aScale,
Modifiers aModifiers,
const ScrollableLayerGuid& aGuid,
int32_t aClickCount);
void ProcessLongTap(const nsCOMPtr<nsIPresShell>& aUtils,
const CSSPoint& aPoint,
const CSSToLayoutDeviceScale& aScale,
Modifiers aModifiers,
const ScrollableLayerGuid& aGuid,
uint64_t aInputBlockId);
void ProcessLongTapUp(const nsCOMPtr<nsIPresShell>& aPresShell,
const CSSPoint& aPoint,
const CSSToLayoutDeviceScale& aScale,
Modifiers aModifiers);
void ProcessTouchEvent(const WidgetTouchEvent& aEvent,
const ScrollableLayerGuid& aGuid,
uint64_t aInputBlockId,
nsEventStatus aApzResponse,
nsEventStatus aContentResponse);
void ProcessWheelEvent(const WidgetWheelEvent& aEvent,
const ScrollableLayerGuid& aGuid,
uint64_t aInputBlockId);
void ProcessMouseEvent(const WidgetMouseEvent& aEvent,
const ScrollableLayerGuid& aGuid,
uint64_t aInputBlockId);
void ProcessAPZStateChange(ViewID aViewId,
APZStateChange aChange,
int aArg);
void ProcessClusterHit();
private:
~APZEventState();
bool SendPendingTouchPreventedResponse(bool aPreventDefault);
bool FireContextmenuEvents(const nsCOMPtr<nsIPresShell>& aPresShell,
const CSSPoint& aPoint,
const CSSToLayoutDeviceScale& aScale,
Modifiers aModifiers,
const nsCOMPtr<nsIWidget>& aWidget);
already_AddRefed<nsIWidget> GetWidget() const;
private:
nsWeakPtr mWidget;
RefPtr<ActiveElementManager> mActiveElementManager;
ContentReceivedInputBlockCallback mContentReceivedInputBlockCallback;
bool mPendingTouchPreventedResponse;
ScrollableLayerGuid mPendingTouchPreventedGuid;
uint64_t mPendingTouchPreventedBlockId;
bool mEndTouchIsClick;
bool mTouchEndCancelled;
int32_t mLastTouchIdentifier;
};
} // namespace layers
} // namespace mozilla
#endif /* mozilla_layers_APZEventState_h */
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