зеркало из https://github.com/mozilla/gecko-dev.git
83 строки
2.8 KiB
C++
83 строки
2.8 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 "mozilla/BasicEvents.h"
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#include "mozilla/dom/Touch.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 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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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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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 nsDataHashtable<nsUint32HashKey, TouchInfo>* sCaptureTouchList;
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static layers::LayersId sCaptureTouchLayersId;
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};
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} // namespace mozilla
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#endif /* !defined(TouchManager_h_) */
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