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The Pointer Events spec defines that: > Authors can prevent the firing of certain compatibility mouse events by > canceling the pointerdown event (if the isPrimary property is true). > <snip> > Note, however, that this does not prevent the mouseover, mouseenter, mouseout, > or mouseleave events from firing. https://w3c.github.io/pointerevents/#the-pointerdown-event The other browsers conform to this. Therefore, we should stop dispatching compatibility mouse events only if the preceding `pointerdown` is consumed by content. I.e., we need to keep dispatching touch events and `click` etc which indicate what should happen on the element. Currently, `APZEventState` does not manage whether the preceding `pointerdown` is canceled or not. So, it dispatches compatibility mouse events via `APZCCallbackHelper` after the consumed pointer is removed. Therefore, we need to make it manage whether the preceding `pointerdown` of the first touch is consumed or not and `APZCCallbackHelper` needs an option to dispatch the compatibility mouse events only to chrome (they are required to dispatch `click` etc). However, if `APZEventState` is not available like test API used in the remote process, `TouchManager` needs to manage it instead of `APZEventState`. I don't think only `TouchManager` should manage it because `APZEventState` manages complicated state of touch gestures and that can know whether the synthesizing compatibility mouse events related to the consumed `pointerdown` or not strictly. Therefore, this patch makes the `TouchManager` state used only in the path handling synthesized events for tests. Differential Revision: https://phabricator.services.mozilla.com/D208706
115 lines
4.4 KiB
C++
115 lines
4.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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/* Description of TouchManager class.
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* Incapsulate code related with work of touch events.
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*/
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#ifndef TouchManager_h_
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#define TouchManager_h_
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#include "Units.h"
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#include "mozilla/BasicEvents.h"
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#include "mozilla/dom/Touch.h"
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#include "mozilla/StaticPtr.h"
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#include "mozilla/TouchEvents.h"
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#include "nsRefPtrHashtable.h"
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namespace mozilla {
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class PresShell;
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class TimeStamp;
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class TouchManager {
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public:
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// Initialize and release static variables
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static void InitializeStatics();
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static void ReleaseStatics();
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void Init(PresShell* aPresShell, dom::Document* aDocument);
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void Destroy();
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// Perform hit test and setup the event targets for touchstart. Other touch
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// events are dispatched to the same target as touchstart.
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static nsIFrame* SetupTarget(WidgetTouchEvent* aEvent, nsIFrame* aFrame);
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/**
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* This function checks whether all touch points hit elements in the same
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* document. If not, we try to find its cross document parent which is in the
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* same document of the existing target as the event target. We mark the
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* touch point as suppressed if can't find it. The suppressed touch points are
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* removed in TouchManager::PreHandleEvent so that we don't dispatch them to
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* content.
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*
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* @param aEvent A touch event to be checked.
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*
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* @return The targeted frame of aEvent.
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*/
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static nsIFrame* SuppressInvalidPointsAndGetTargetedFrame(
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WidgetTouchEvent* aEvent);
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bool PreHandleEvent(mozilla::WidgetEvent* aEvent, nsEventStatus* aStatus,
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bool& aTouchIsNew,
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nsCOMPtr<nsIContent>& aCurrentEventContent);
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void PostHandleEvent(const mozilla::WidgetEvent* aEvent,
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const nsEventStatus* aStatus);
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static already_AddRefed<nsIContent> GetAnyCapturedTouchTarget();
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static bool HasCapturedTouch(int32_t aId);
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static already_AddRefed<dom::Touch> GetCapturedTouch(int32_t aId);
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static bool ShouldConvertTouchToPointer(const dom::Touch* aTouch,
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const WidgetTouchEvent* aEvent);
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// This should be called after PostHandleEvent() is called. Note that this
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// cannot check touches outside this process. So, this should not be used for
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// actual user input handling. This is designed for a fallback path to
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// dispatch mouse events for touch events synthesized without APZ.
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static bool IsSingleTapEndToDoDefault(const WidgetTouchEvent* aTouchEndEvent);
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// Returns true if the preceding `pointerdown` was consumed by content of
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// the last active pointers of touches.
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static bool IsPrecedingTouchPointerDownConsumedByContent();
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private:
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void EvictTouches(dom::Document* aLimitToDocument = nullptr);
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static void EvictTouchPoint(RefPtr<dom::Touch>& aTouch,
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dom::Document* aLimitToDocument);
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static void AppendToTouchList(WidgetTouchEvent::TouchArrayBase* aTouchList);
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RefPtr<PresShell> mPresShell;
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RefPtr<dom::Document> mDocument;
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struct TouchInfo {
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RefPtr<mozilla::dom::Touch> mTouch;
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nsCOMPtr<nsIContent> mNonAnonymousTarget;
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bool mConvertToPointer;
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};
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static StaticAutoPtr<nsTHashMap<nsUint32HashKey, TouchInfo>>
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sCaptureTouchList;
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static layers::LayersId sCaptureTouchLayersId;
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// The last start of a single tap. This will be set to "Null" if the tap is
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// consumed or becomes not a single tap.
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// NOTE: This is used for touches without APZ, i.e., if they are synthesized
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// in-process for tests.
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static TimeStamp sSingleTouchStartTimeStamp;
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// The last start point of the single tap tracked with
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// sSingleTouchStartTimeStamp.
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// NOTE: This is used for touches without APZ, i.e., if they are synthesized
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// in-process for tests.
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static LayoutDeviceIntPoint sSingleTouchStartPoint;
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// Whether the preceding `pointerdown` of the last active touches is consumed
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// by content or not. If APZ is enabled, same state is managed by
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// APZEventState.
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// NOTE: This is used for touches without APZ, i.e., if they are synthesized
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// in-process for tests.
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static bool sPrecedingTouchPointerDownConsumedByContent;
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};
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} // namespace mozilla
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#endif /* !defined(TouchManager_h_) */
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