mirror of
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922d8d091b
Differential Revision: https://phabricator.services.mozilla.com/D122723
133 lines
5.1 KiB
C++
133 lines
5.1 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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#include "CoalescedTouchData.h"
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#include "BrowserChild.h"
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#include "mozilla/dom/PointerEventHandler.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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static const uint32_t sMaxTouchMoveIdentifiers = 10;
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void CoalescedTouchData::CreateCoalescedTouchEvent(
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const WidgetTouchEvent& aEvent) {
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MOZ_ASSERT(IsEmpty());
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mCoalescedInputEvent = MakeUnique<WidgetTouchEvent>(aEvent);
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for (size_t i = 0; i < mCoalescedInputEvent->mTouches.Length(); i++) {
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const RefPtr<Touch>& touch = mCoalescedInputEvent->mTouches[i];
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touch->mCoalescedWidgetEvents = MakeAndAddRef<WidgetPointerEventHolder>();
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// Add an initial event into coalesced events, so
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// the relevant pointer event would at least contain one coalesced event.
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WidgetPointerEvent* event =
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touch->mCoalescedWidgetEvents->mEvents.AppendElement(WidgetPointerEvent(
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aEvent.IsTrusted(), ePointerMove, aEvent.mWidget));
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PointerEventHandler::InitPointerEventFromTouch(*event, aEvent, *touch,
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i == 0);
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event->mFlags.mBubbles = false;
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event->mFlags.mCancelable = false;
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}
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}
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void CoalescedTouchData::Coalesce(const WidgetTouchEvent& aEvent,
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const ScrollableLayerGuid& aGuid,
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const uint64_t& aInputBlockId,
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const nsEventStatus& aApzResponse) {
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MOZ_ASSERT(aEvent.mMessage == eTouchMove);
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if (IsEmpty()) {
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CreateCoalescedTouchEvent(aEvent);
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mGuid = aGuid;
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mInputBlockId = aInputBlockId;
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mApzResponse = aApzResponse;
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} else {
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MOZ_ASSERT(mGuid == aGuid);
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MOZ_ASSERT(mInputBlockId == aInputBlockId);
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MOZ_ASSERT(mCoalescedInputEvent->mModifiers == aEvent.mModifiers);
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MOZ_ASSERT(mCoalescedInputEvent->mInputSource == aEvent.mInputSource);
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for (size_t i = 0; i < aEvent.mTouches.Length(); i++) {
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const RefPtr<Touch>& touch = aEvent.mTouches[i];
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// Get the same touch in the original event
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RefPtr<Touch> sameTouch = GetTouch(touch->Identifier());
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// The checks in CoalescedTouchData::CanCoalesce ensure it should never
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// be null.
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MOZ_ASSERT(sameTouch);
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MOZ_ASSERT(sameTouch->mCoalescedWidgetEvents);
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MOZ_ASSERT(!sameTouch->mCoalescedWidgetEvents->mEvents.IsEmpty());
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if (!sameTouch->Equals(touch)) {
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sameTouch->SetSameAs(touch);
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WidgetPointerEvent* event =
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sameTouch->mCoalescedWidgetEvents->mEvents.AppendElement(
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WidgetPointerEvent(aEvent.IsTrusted(), ePointerMove,
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aEvent.mWidget));
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PointerEventHandler::InitPointerEventFromTouch(*event, aEvent, *touch,
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i == 0);
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event->mFlags.mBubbles = false;
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event->mFlags.mCancelable = false;
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}
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}
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mCoalescedInputEvent->mTimeStamp = aEvent.mTimeStamp;
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}
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}
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bool CoalescedTouchData::CanCoalesce(const WidgetTouchEvent& aEvent,
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const ScrollableLayerGuid& aGuid,
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const uint64_t& aInputBlockId,
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const nsEventStatus& aApzResponse) {
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MOZ_ASSERT(!IsEmpty());
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if (mGuid != aGuid || mInputBlockId != aInputBlockId ||
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mCoalescedInputEvent->mModifiers != aEvent.mModifiers ||
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mCoalescedInputEvent->mInputSource != aEvent.mInputSource ||
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aEvent.mTouches.Length() > sMaxTouchMoveIdentifiers) {
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return false;
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}
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// Ensures both touchmove events have the same touches
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if (aEvent.mTouches.Length() != mCoalescedInputEvent->mTouches.Length()) {
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return false;
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}
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for (const RefPtr<Touch>& touch : aEvent.mTouches) {
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if (!GetTouch(touch->Identifier())) {
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return false;
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}
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}
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// If one of them is eIgnore and the other one is eConsumeDoDefault,
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// we always coalesce them to eConsumeDoDefault.
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if (mApzResponse != aApzResponse) {
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if (mApzResponse == nsEventStatus::nsEventStatus_eIgnore &&
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aApzResponse == nsEventStatus::nsEventStatus_eConsumeDoDefault) {
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mApzResponse = aApzResponse;
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} else if (mApzResponse != nsEventStatus::nsEventStatus_eConsumeDoDefault ||
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aApzResponse != nsEventStatus::nsEventStatus_eIgnore) {
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return false;
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}
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}
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return true;
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}
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Touch* CoalescedTouchData::GetTouch(int32_t aIdentifier) {
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for (const RefPtr<Touch>& touch : mCoalescedInputEvent->mTouches) {
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if (touch->Identifier() == aIdentifier) {
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return touch;
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}
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}
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return nullptr;
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}
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void CoalescedTouchMoveFlusher::WillRefresh(mozilla::TimeStamp aTime) {
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MOZ_ASSERT(mRefreshDriver);
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mBrowserChild->ProcessPendingCoalescedTouchData();
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}
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CoalescedTouchMoveFlusher::CoalescedTouchMoveFlusher(
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BrowserChild* aBrowserChild)
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: CoalescedInputFlusher(aBrowserChild) {}
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CoalescedTouchMoveFlusher::~CoalescedTouchMoveFlusher() { RemoveObserver(); }
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