зеркало из https://github.com/mozilla/gecko-dev.git
99 строки
3.2 KiB
C++
99 строки
3.2 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 "base/basictypes.h"
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#include "CoalescedMouseData.h"
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#include "TabChild.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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void
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CoalescedMouseData::Coalesce(const WidgetMouseEvent& aEvent,
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const ScrollableLayerGuid& aGuid,
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const uint64_t& aInputBlockId)
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{
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if (IsEmpty()) {
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mCoalescedInputEvent = MakeUnique<WidgetMouseEvent>(aEvent);
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mGuid = aGuid;
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mInputBlockId = aInputBlockId;
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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->mReason == aEvent.mReason);
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MOZ_ASSERT(mCoalescedInputEvent->inputSource == aEvent.inputSource);
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// Assuming button changes should trigger other mouse events and dispatch
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// the coalesced mouse move events.
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MOZ_ASSERT(mCoalescedInputEvent->button == aEvent.button);
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MOZ_ASSERT(mCoalescedInputEvent->buttons == aEvent.buttons);
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mCoalescedInputEvent->mTimeStamp = aEvent.mTimeStamp;
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mCoalescedInputEvent->mRefPoint = aEvent.mRefPoint;
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mCoalescedInputEvent->pressure = aEvent.pressure;
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mCoalescedInputEvent->AssignPointerHelperData(aEvent);
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}
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}
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bool
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CoalescedMouseData::CanCoalesce(const WidgetMouseEvent& aEvent,
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const ScrollableLayerGuid& aGuid,
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const uint64_t& aInputBlockId)
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{
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return !mCoalescedInputEvent ||
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(mCoalescedInputEvent->mModifiers == aEvent.mModifiers &&
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mCoalescedInputEvent->inputSource == aEvent.inputSource &&
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mCoalescedInputEvent->pointerId == aEvent.pointerId &&
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mGuid == aGuid &&
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mInputBlockId == aInputBlockId);
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}
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void
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CoalescedMouseMoveFlusher::WillRefresh(mozilla::TimeStamp aTime)
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{
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MOZ_ASSERT(mRefreshDriver);
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mTabChild->MaybeDispatchCoalescedMouseMoveEvents();
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RemoveObserver();
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}
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void
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CoalescedMouseMoveFlusher::StartObserver()
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{
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nsRefreshDriver* refreshDriver = GetRefreshDriver();
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if (mRefreshDriver && mRefreshDriver == refreshDriver) {
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// Nothing to do if we already added an observer and it's same refresh driver.
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return;
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}
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RemoveObserver();
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if (refreshDriver) {
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mRefreshDriver = refreshDriver;
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DebugOnly<bool> success =
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mRefreshDriver->AddRefreshObserver(this, FlushType::Event);
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MOZ_ASSERT(success);
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}
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}
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void
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CoalescedMouseMoveFlusher::RemoveObserver()
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{
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if (mRefreshDriver) {
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mRefreshDriver->RemoveRefreshObserver(this, FlushType::Event);
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mRefreshDriver = nullptr;
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}
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}
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nsRefreshDriver*
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CoalescedMouseMoveFlusher::GetRefreshDriver()
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{
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nsCOMPtr<nsIPresShell> presShell = mTabChild->GetPresShell();
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if (!presShell || !presShell->GetPresContext() ||
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!presShell->GetPresContext()->RefreshDriver()) {
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return nullptr;
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}
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return presShell->GetPresContext()->RefreshDriver();
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}
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