473f8337a1
The two happening at the same time can lead to the APZ autoscroll being
cancelled due to APZ receiving a main-thread scroll offset update.
To achieve this:
- The content process assumes APZ is handling the autoscroll until
told otherwise.
- If the parent process knows APZ won't handle an autoscroll, it
tells the content process via its response to the Autoscroll:Start
message. This covers all cases where APZ doesn't handle the
autoscroll, except the case where APZCTreeManager itself rejects
the autoscroll and it lives in the compositor process rather than
the parent process.
- If APZCTreeManager rejects an autoscroll and it lives in the
compositor process, it sends an 'autoscroll-rejected-by-apz' message
to the content process.
MozReview-Commit-ID: L62v4COai6W
128 lines
3.4 KiB
C++
128 lines
3.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set sw=4 ts=8 et 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 "ContentProcessController.h"
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#include "mozilla/dom/TabChild.h"
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#include "mozilla/layers/APZCCallbackHelper.h"
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#include "mozilla/layers/APZChild.h"
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#include "nsIContentInlines.h"
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#include "InputData.h" // for InputData
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namespace mozilla {
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namespace layers {
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ContentProcessController::ContentProcessController(const RefPtr<dom::TabChild>& aBrowser)
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: mBrowser(aBrowser)
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{
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MOZ_ASSERT(mBrowser);
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}
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void
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ContentProcessController::RequestContentRepaint(const FrameMetrics& aFrameMetrics)
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{
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if (mBrowser) {
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mBrowser->UpdateFrame(aFrameMetrics);
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}
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}
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void
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ContentProcessController::HandleTap(
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TapType aType,
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const LayoutDevicePoint& aPoint,
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Modifiers aModifiers,
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const ScrollableLayerGuid& aGuid,
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uint64_t aInputBlockId)
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{
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// This should never get called
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MOZ_ASSERT(false);
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}
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void
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ContentProcessController::NotifyPinchGesture(
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PinchGestureInput::PinchGestureType aType,
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const ScrollableLayerGuid& aGuid,
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LayoutDeviceCoord aSpanChange,
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Modifiers aModifiers)
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{
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// This should never get called
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MOZ_ASSERT_UNREACHABLE("Unexpected message to content process");
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}
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void
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ContentProcessController::NotifyAPZStateChange(
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const ScrollableLayerGuid& aGuid,
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APZStateChange aChange,
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int aArg)
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{
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if (mBrowser) {
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mBrowser->NotifyAPZStateChange(aGuid.mScrollId, aChange, aArg);
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}
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}
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void
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ContentProcessController::NotifyMozMouseScrollEvent(
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const FrameMetrics::ViewID& aScrollId,
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const nsString& aEvent)
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{
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if (mBrowser) {
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APZCCallbackHelper::NotifyMozMouseScrollEvent(aScrollId, aEvent);
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}
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}
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void
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ContentProcessController::NotifyFlushComplete()
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{
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if (mBrowser) {
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nsCOMPtr<nsIPresShell> shell;
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if (nsCOMPtr<nsIDocument> doc = mBrowser->GetDocument()) {
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shell = doc->GetShell();
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}
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APZCCallbackHelper::NotifyFlushComplete(shell.get());
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}
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}
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void
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ContentProcessController::NotifyAsyncScrollbarDragRejected(const FrameMetrics::ViewID& aScrollId)
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{
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APZCCallbackHelper::NotifyAsyncScrollbarDragRejected(aScrollId);
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}
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void
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ContentProcessController::NotifyAsyncAutoscrollRejected(const FrameMetrics::ViewID& aScrollId)
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{
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APZCCallbackHelper::NotifyAsyncAutoscrollRejected(aScrollId);
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}
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void
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ContentProcessController::CancelAutoscroll(const ScrollableLayerGuid& aGuid)
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{
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// This should never get called
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MOZ_ASSERT_UNREACHABLE("Unexpected message to content process");
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}
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void
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ContentProcessController::PostDelayedTask(already_AddRefed<Runnable> aRunnable, int aDelayMs)
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{
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MOZ_ASSERT_UNREACHABLE("ContentProcessController should only be used remotely.");
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}
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bool
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ContentProcessController::IsRepaintThread()
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{
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return NS_IsMainThread();
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}
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void
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ContentProcessController::DispatchToRepaintThread(already_AddRefed<Runnable> aTask)
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{
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NS_DispatchToMainThread(Move(aTask));
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}
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} // namespace layers
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} // namespace mozilla
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