128 lines
4.0 KiB
C++
128 lines
4.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 "ChromeProcessController.h"
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#include "MainThreadUtils.h" // for NS_IsMainThread()
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#include "base/message_loop.h" // for MessageLoop
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#include "mozilla/layers/CompositorParent.h"
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#include "mozilla/layers/APZCCallbackHelper.h"
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#include "nsIDocument.h"
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#include "nsIPresShell.h"
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#include "nsLayoutUtils.h"
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#include "nsView.h"
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using namespace mozilla;
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using namespace mozilla::layers;
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using namespace mozilla::widget;
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ChromeProcessController::ChromeProcessController(nsIWidget* aWidget)
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: mWidget(aWidget)
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, mUILoop(MessageLoop::current())
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{
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// Otherwise we're initializing mUILoop incorrectly.
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MOZ_ASSERT(NS_IsMainThread());
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mUILoop->PostTask(
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FROM_HERE,
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NewRunnableMethod(this, &ChromeProcessController::InitializeRoot));
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}
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void
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ChromeProcessController::InitializeRoot()
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{
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// Create a view-id and set a zero-margin displayport for the root element
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// of the root document in the chrome process. This ensures that the scroll
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// frame for this element gets an APZC, which in turn ensures that all content
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// in the chrome processes is covered by an APZC.
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// The displayport is zero-margin because this element is generally not
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// actually scrollable (if it is, APZC will set proper margins when it's
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// scrolled).
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nsView* view = nsView::GetViewFor(mWidget);
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MOZ_ASSERT(view);
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nsIPresShell* presShell = view->GetPresShell();
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MOZ_ASSERT(presShell);
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MOZ_ASSERT(presShell->GetDocument());
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nsIContent* content = presShell->GetDocument()->GetDocumentElement();
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MOZ_ASSERT(content);
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uint32_t presShellId;
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FrameMetrics::ViewID viewId;
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if (APZCCallbackHelper::GetOrCreateScrollIdentifiers(content, &presShellId, &viewId)) {
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nsLayoutUtils::SetDisplayPortMargins(content, presShell, ScreenMargin(), 0,
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nsLayoutUtils::RepaintMode::DoNotRepaint);
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}
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}
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void
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ChromeProcessController::RequestContentRepaint(const FrameMetrics& aFrameMetrics)
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{
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MOZ_ASSERT(NS_IsMainThread());
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if (aFrameMetrics.GetScrollId() == FrameMetrics::NULL_SCROLL_ID) {
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return;
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}
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nsCOMPtr<nsIContent> targetContent = nsLayoutUtils::FindContentFor(aFrameMetrics.GetScrollId());
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if (targetContent) {
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FrameMetrics metrics = aFrameMetrics;
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APZCCallbackHelper::UpdateSubFrame(targetContent, metrics);
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}
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}
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void
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ChromeProcessController::PostDelayedTask(Task* aTask, int aDelayMs)
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{
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MessageLoop::current()->PostDelayedTask(FROM_HERE, aTask, aDelayMs);
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}
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void
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ChromeProcessController::AcknowledgeScrollUpdate(const FrameMetrics::ViewID& aScrollId,
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const uint32_t& aScrollGeneration)
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{
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APZCCallbackHelper::AcknowledgeScrollUpdate(aScrollId, aScrollGeneration);
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}
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void
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ChromeProcessController::Destroy()
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{
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if (MessageLoop::current() != mUILoop) {
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mUILoop->PostTask(
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FROM_HERE,
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NewRunnableMethod(this, &ChromeProcessController::Destroy));
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return;
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}
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MOZ_ASSERT(MessageLoop::current() == mUILoop);
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mWidget = nullptr;
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}
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float
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ChromeProcessController::GetPresShellResolution() const
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{
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// The document in the chrome process cannot be zoomed, so its pres shell
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// resolution is 1.
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return 1.0f;
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}
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void
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ChromeProcessController::HandleSingleTap(const CSSPoint& aPoint,
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int32_t aModifiers,
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const ScrollableLayerGuid& aGuid)
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{
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if (MessageLoop::current() != mUILoop) {
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mUILoop->PostTask(
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FROM_HERE,
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NewRunnableMethod(this, &ChromeProcessController::HandleSingleTap,
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aPoint, aModifiers, aGuid));
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return;
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}
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LayoutDevicePoint point =
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APZCCallbackHelper::ApplyCallbackTransform(aPoint, aGuid, GetPresShellResolution())
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* mWidget->GetDefaultScale();
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APZCCallbackHelper::FireSingleTapEvent(point, mWidget);
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}
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