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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
*/
/* Description of TouchManager class.
* Incapsulate code related with work of touch events.
*/
#ifndef TouchManager_h_
#define TouchManager_h_
#include "Units.h"
#include "mozilla/BasicEvents.h"
#include "mozilla/dom/Touch.h"
#include "mozilla/StaticPtr.h"
#include "mozilla/TouchEvents.h"
#include "nsRefPtrHashtable.h"
namespace mozilla {
class PresShell;
class TimeStamp;
class TouchManager {
public:
// Initialize and release static variables
static void InitializeStatics();
static void ReleaseStatics();
void Init(PresShell* aPresShell, dom::Document* aDocument);
void Destroy();
// Perform hit test and setup the event targets for touchstart. Other touch
// events are dispatched to the same target as touchstart.
static nsIFrame* SetupTarget(WidgetTouchEvent* aEvent, nsIFrame* aFrame);
/**
* This function checks whether all touch points hit elements in the same
* document. If not, we try to find its cross document parent which is in the
* same document of the existing target as the event target. We mark the
* touch point as suppressed if can't find it. The suppressed touch points are
* removed in TouchManager::PreHandleEvent so that we don't dispatch them to
* content.
*
* @param aEvent A touch event to be checked.
*
* @return The targeted frame of aEvent.
*/
static nsIFrame* SuppressInvalidPointsAndGetTargetedFrame(
WidgetTouchEvent* aEvent);
bool PreHandleEvent(mozilla::WidgetEvent* aEvent, nsEventStatus* aStatus,
bool& aTouchIsNew,
nsCOMPtr<nsIContent>& aCurrentEventContent);
void PostHandleEvent(const mozilla::WidgetEvent* aEvent,
const nsEventStatus* aStatus);
static already_AddRefed<nsIContent> GetAnyCapturedTouchTarget();
static bool HasCapturedTouch(int32_t aId);
static already_AddRefed<dom::Touch> GetCapturedTouch(int32_t aId);
static bool ShouldConvertTouchToPointer(const dom::Touch* aTouch,
const WidgetTouchEvent* aEvent);
// This should be called after PostHandleEvent() is called. Note that this
// cannot check touches outside this process. So, this should not be used for
// actual user input handling. This is designed for a fallback path to
// dispatch mouse events for touch events synthesized without APZ.
static bool IsSingleTapEndToDoDefault(const WidgetTouchEvent* aTouchEndEvent);
// Returns true if the preceding `pointerdown` was consumed by content of
// the last active pointers of touches.
static bool IsPrecedingTouchPointerDownConsumedByContent();
private:
void EvictTouches(dom::Document* aLimitToDocument = nullptr);
static void EvictTouchPoint(RefPtr<dom::Touch>& aTouch,
dom::Document* aLimitToDocument);
static void AppendToTouchList(WidgetTouchEvent::TouchArrayBase* aTouchList);
RefPtr<PresShell> mPresShell;
RefPtr<dom::Document> mDocument;
struct TouchInfo {
RefPtr<mozilla::dom::Touch> mTouch;
nsCOMPtr<nsIContent> mNonAnonymousTarget;
bool mConvertToPointer;
};
static StaticAutoPtr<nsTHashMap<nsUint32HashKey, TouchInfo>>
sCaptureTouchList;
static layers::LayersId sCaptureTouchLayersId;
// The last start of a single tap. This will be set to "Null" if the tap is
// consumed or becomes not a single tap.
// NOTE: This is used for touches without APZ, i.e., if they are synthesized
// in-process for tests.
static TimeStamp sSingleTouchStartTimeStamp;
// The last start point of the single tap tracked with
// sSingleTouchStartTimeStamp.
// NOTE: This is used for touches without APZ, i.e., if they are synthesized
// in-process for tests.
static LayoutDeviceIntPoint sSingleTouchStartPoint;
// Whether the preceding `pointerdown` of the last active touches is consumed
// by content or not. If APZ is enabled, same state is managed by
// APZEventState.
// NOTE: This is used for touches without APZ, i.e., if they are synthesized
// in-process for tests.
static bool sPrecedingTouchPointerDownConsumedByContent;
};
} // namespace mozilla
#endif /* !defined(TouchManager_h_) */