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tenfourfox/layout/ipc/RenderFrameParent.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: sw=2 ts=8 et :
*/
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "base/basictypes.h"
#include "BasicLayers.h"
#include "gfxPrefs.h"
#ifdef MOZ_ENABLE_D3D9_LAYER
# include "LayerManagerD3D9.h"
#endif //MOZ_ENABLE_D3D9_LAYER
#include "mozilla/BrowserElementParent.h"
#include "mozilla/EventForwards.h" // for Modifiers
#include "mozilla/dom/ContentChild.h"
#include "mozilla/dom/TabParent.h"
#include "mozilla/layers/APZCTreeManager.h"
#include "mozilla/layers/APZThreadUtils.h"
#include "mozilla/layers/CompositorParent.h"
#include "mozilla/layers/LayerTransactionParent.h"
#include "nsContentUtils.h"
#include "nsFocusManager.h"
#include "nsFrameLoader.h"
#include "nsIObserver.h"
#include "nsStyleStructInlines.h"
#include "nsSubDocumentFrame.h"
#include "nsView.h"
#include "nsViewportFrame.h"
#include "RenderFrameParent.h"
#include "mozilla/layers/LayerManagerComposite.h"
#include "mozilla/layers/CompositorChild.h"
#include "ClientLayerManager.h"
#include "FrameLayerBuilder.h"
#ifdef MOZ_ANDROID_APZ
#include "AndroidBridge.h"
#endif
using namespace mozilla::dom;
using namespace mozilla::gfx;
using namespace mozilla::layers;
namespace mozilla {
namespace layout {
typedef FrameMetrics::ViewID ViewID;
/**
* Gets the layer-pixel offset of aContainerFrame's content rect top-left
* from the nearest display item reference frame (which we assume will be inducing
* a ContainerLayer).
*/
static nsIntPoint
GetContentRectLayerOffset(nsIFrame* aContainerFrame, nsDisplayListBuilder* aBuilder)
{
nscoord auPerDevPixel = aContainerFrame->PresContext()->AppUnitsPerDevPixel();
// Offset to the content rect in case we have borders or padding
// Note that aContainerFrame could be a reference frame itself, so
// we need to be careful here to ensure that we call ToReferenceFrame
// on aContainerFrame and not its parent.
nsPoint frameOffset = aBuilder->ToReferenceFrame(aContainerFrame) +
aContainerFrame->GetContentRectRelativeToSelf().TopLeft();
return frameOffset.ToNearestPixels(auPerDevPixel);
}
// Return true iff |aManager| is a "temporary layer manager". They're
// used for small software rendering tasks, like drawWindow. That's
// currently implemented by a BasicLayerManager without a backing
// widget, and hence in non-retained mode.
inline static bool
IsTempLayerManager(LayerManager* aManager)
{
return (mozilla::layers::LayersBackend::LAYERS_BASIC == aManager->GetBackendType() &&
!static_cast<BasicLayerManager*>(aManager)->IsRetained());
}
already_AddRefed<LayerManager>
GetFrom(nsFrameLoader* aFrameLoader)
{
nsIDocument* doc = aFrameLoader->GetOwnerDoc();
if (!doc) {
return nullptr;
}
return nsContentUtils::LayerManagerForDocument(doc);
}
class RemoteContentController : public GeckoContentController {
public:
explicit RemoteContentController(RenderFrameParent* aRenderFrame)
: mUILoop(MessageLoop::current())
, mRenderFrame(aRenderFrame)
{ }
virtual void RequestContentRepaint(const FrameMetrics& aFrameMetrics) override
{
MOZ_ASSERT(NS_IsMainThread());
if (mRenderFrame) {
TabParent* browser = TabParent::GetFrom(mRenderFrame->Manager());
browser->UpdateFrame(aFrameMetrics);
}
}
virtual void RequestFlingSnap(const FrameMetrics::ViewID& aScrollId,
const mozilla::CSSPoint& aDestination) override
{
if (MessageLoop::current() != mUILoop) {
// We have to send this message from the "UI thread" (main
// thread).
mUILoop->PostTask(
FROM_HERE,
NewRunnableMethod(this, &RemoteContentController::RequestFlingSnap,
aScrollId, aDestination));
return;
}
if (mRenderFrame) {
TabParent* browser = TabParent::GetFrom(mRenderFrame->Manager());
browser->RequestFlingSnap(aScrollId, aDestination);
}
}
virtual void AcknowledgeScrollUpdate(const FrameMetrics::ViewID& aScrollId,
const uint32_t& aScrollGeneration) override
{
if (MessageLoop::current() != mUILoop) {
// We have to send this message from the "UI thread" (main
// thread).
mUILoop->PostTask(
FROM_HERE,
NewRunnableMethod(this, &RemoteContentController::AcknowledgeScrollUpdate,
aScrollId, aScrollGeneration));
return;
}
if (mRenderFrame) {
TabParent* browser = TabParent::GetFrom(mRenderFrame->Manager());
browser->AcknowledgeScrollUpdate(aScrollId, aScrollGeneration);
}
}
virtual void HandleDoubleTap(const CSSPoint& aPoint,
Modifiers aModifiers,
const ScrollableLayerGuid& aGuid) override
{
if (MessageLoop::current() != mUILoop) {
// We have to send this message from the "UI thread" (main
// thread).
mUILoop->PostTask(
FROM_HERE,
NewRunnableMethod(this, &RemoteContentController::HandleDoubleTap,
aPoint, aModifiers, aGuid));
return;
}
if (mRenderFrame) {
TabParent* browser = TabParent::GetFrom(mRenderFrame->Manager());
browser->HandleDoubleTap(aPoint, aModifiers, aGuid);
}
}
virtual void HandleSingleTap(const CSSPoint& aPoint,
Modifiers aModifiers,
const ScrollableLayerGuid& aGuid) override
{
if (MessageLoop::current() != mUILoop) {
// We have to send this message from the "UI thread" (main
// thread).
mUILoop->PostTask(
FROM_HERE,
NewRunnableMethod(this, &RemoteContentController::HandleSingleTap,
aPoint, aModifiers, aGuid));
return;
}
if (mRenderFrame) {
mRenderFrame->TakeFocusForClickFromTap();
TabParent* browser = TabParent::GetFrom(mRenderFrame->Manager());
browser->HandleSingleTap(aPoint, aModifiers, aGuid);
}
}
virtual void HandleLongTap(const CSSPoint& aPoint,
Modifiers aModifiers,
const ScrollableLayerGuid& aGuid,
uint64_t aInputBlockId) override
{
if (MessageLoop::current() != mUILoop) {
// We have to send this message from the "UI thread" (main
// thread).
mUILoop->PostTask(
FROM_HERE,
NewRunnableMethod(this, &RemoteContentController::HandleLongTap,
aPoint, aModifiers, aGuid, aInputBlockId));
return;
}
if (mRenderFrame) {
TabParent* browser = TabParent::GetFrom(mRenderFrame->Manager());
browser->HandleLongTap(aPoint, aModifiers, aGuid, aInputBlockId);
}
}
void ClearRenderFrame() { mRenderFrame = nullptr; }
virtual void PostDelayedTask(Task* aTask, int aDelayMs) override
{
#ifdef MOZ_ANDROID_APZ
AndroidBridge::Bridge()->PostTaskToUiThread(aTask, aDelayMs);
#else
(MessageLoop::current() ? MessageLoop::current() : mUILoop)->
PostDelayedTask(FROM_HERE, aTask, aDelayMs);
#endif
}
virtual bool GetTouchSensitiveRegion(CSSRect* aOutRegion) override
{
if (mTouchSensitiveRegion.IsEmpty())
return false;
*aOutRegion = CSSRect::FromAppUnits(mTouchSensitiveRegion.GetBounds());
return true;
}
virtual void NotifyAPZStateChange(const ScrollableLayerGuid& aGuid,
APZStateChange aChange,
int aArg) override
{
if (MessageLoop::current() != mUILoop) {
mUILoop->PostTask(
FROM_HERE,
NewRunnableMethod(this, &RemoteContentController::NotifyAPZStateChange,
aGuid, aChange, aArg));
return;
}
if (mRenderFrame) {
TabParent* browser = TabParent::GetFrom(mRenderFrame->Manager());
browser->NotifyAPZStateChange(aGuid.mScrollId, aChange, aArg);
}
}
void NotifyMozMouseScrollEvent(const FrameMetrics::ViewID& aScrollId, const nsString& aEvent) override {
if (MessageLoop::current() != mUILoop) {
mUILoop->PostTask(
FROM_HERE,
NewRunnableMethod(this, &RemoteContentController::NotifyMozMouseScrollEvent, aScrollId, aEvent));
return;
}
if (mRenderFrame) {
TabParent* browser = TabParent::GetFrom(mRenderFrame->Manager());
browser->NotifyMouseScrollTestEvent(aScrollId, aEvent);
}
}
void NotifyFlushComplete() override {
MOZ_ASSERT(NS_IsMainThread());
if (mRenderFrame) {
TabParent* browser = TabParent::GetFrom(mRenderFrame->Manager());
browser->NotifyFlushComplete();
}
}
// Methods used by RenderFrameParent to set fields stored here.
void SetTouchSensitiveRegion(const nsRegion& aRegion)
{
mTouchSensitiveRegion = aRegion;
}
private:
MessageLoop* mUILoop;
RenderFrameParent* mRenderFrame;
nsRegion mTouchSensitiveRegion;
};
RenderFrameParent::RenderFrameParent(nsFrameLoader* aFrameLoader,
TextureFactoryIdentifier* aTextureFactoryIdentifier,
uint64_t* aId,
bool* aSuccess)
: mLayersId(0)
, mFrameLoader(aFrameLoader)
, mFrameLoaderDestroyed(false)
, mAsyncPanZoomEnabled(false)
{
*aId = 0;
*aSuccess = false;
if (!mFrameLoader) {
return;
}
RefPtr<LayerManager> lm = GetFrom(mFrameLoader);
mAsyncPanZoomEnabled = lm && lm->AsyncPanZoomEnabled();
// Perhaps the document containing this frame currently has no presentation?
if (lm && lm->GetBackendType() == LayersBackend::LAYERS_CLIENT) {
*aTextureFactoryIdentifier =
static_cast<ClientLayerManager*>(lm.get())->GetTextureFactoryIdentifier();
} else {
*aTextureFactoryIdentifier = TextureFactoryIdentifier();
}
if (XRE_IsParentProcess()) {
// Our remote frame will push layers updates to the compositor,
// and we'll keep an indirect reference to that tree.
*aId = mLayersId = CompositorParent::AllocateLayerTreeId();
if (lm && lm->GetBackendType() == LayersBackend::LAYERS_CLIENT) {
ClientLayerManager *clientManager =
static_cast<ClientLayerManager*>(lm.get());
clientManager->GetRemoteRenderer()->SendNotifyChildCreated(mLayersId);
}
if (mAsyncPanZoomEnabled) {
mContentController = new RemoteContentController(this);
CompositorParent::SetControllerForLayerTree(mLayersId, mContentController);
}
} else if (XRE_IsContentProcess()) {
ContentChild::GetSingleton()->SendAllocateLayerTreeId(aId);
mLayersId = *aId;
CompositorChild::Get()->SendNotifyChildCreated(mLayersId);
}
*aSuccess = true;
}
APZCTreeManager*
RenderFrameParent::GetApzcTreeManager()
{
// We can't get a ref to the APZCTreeManager until after the child is
// created and the static getter knows which CompositorParent is
// instantiated with this layers ID. That's why try to fetch it when
// we first need it and cache the result.
// Note: the IsParentProcess check is to deal with nested content process
// scenarios, since in those cases we can have RenderFrameParent instances
// in a child process, but the APZC machinery is not in that process. Bug
// 1020199 should fix this more comprehensively.
if (!mApzcTreeManager && mAsyncPanZoomEnabled && XRE_IsParentProcess()) {
mApzcTreeManager = CompositorParent::GetAPZCTreeManager(mLayersId);
}
return mApzcTreeManager.get();
}
RenderFrameParent::~RenderFrameParent()
{}
void
RenderFrameParent::Destroy()
{
mFrameLoaderDestroyed = true;
}
already_AddRefed<Layer>
RenderFrameParent::BuildLayer(nsDisplayListBuilder* aBuilder,
nsIFrame* aFrame,
LayerManager* aManager,
const nsIntRect& aVisibleRect,
nsDisplayItem* aItem,
const ContainerLayerParameters& aContainerParameters)
{
MOZ_ASSERT(aFrame,
"makes no sense to have a shadow tree without a frame");
MOZ_ASSERT(!mContainer ||
IsTempLayerManager(aManager) ||
mContainer->Manager() == aManager,
"retaining manager changed out from under us ... HELP!");
if (IsTempLayerManager(aManager) ||
(mContainer && mContainer->Manager() != aManager)) {
// This can happen if aManager is a "temporary" manager, or if the
// widget's layer manager changed out from under us. We need to
// FIXME handle the former case somehow, probably with an API to
// draw a manager's subtree. The latter is bad bad bad, but the the
// MOZ_ASSERT() above will flag it. Returning nullptr here will just
// cause the shadow subtree not to be rendered.
if (!aContainerParameters.mForEventsOnly) {
NS_WARNING("Remote iframe not rendered");
}
return nullptr;
}
uint64_t id = GetLayerTreeId();
if (!id) {
return nullptr;
}
RefPtr<Layer> layer =
(aManager->GetLayerBuilder()->GetLeafLayerFor(aBuilder, aItem));
if (!layer) {
layer = aManager->CreateRefLayer();
}
if (!layer) {
// Probably a temporary layer manager that doesn't know how to
// use ref layers.
return nullptr;
}
static_cast<RefLayer*>(layer.get())->SetReferentId(id);
nsIntPoint offset = GetContentRectLayerOffset(aFrame, aBuilder);
// We can only have an offset if we're a child of an inactive
// container, but our display item is LAYER_ACTIVE_FORCE which
// forces all layers above to be active.
MOZ_ASSERT(aContainerParameters.mOffset == nsIntPoint());
gfx::Matrix4x4 m = gfx::Matrix4x4::Translation(offset.x, offset.y, 0.0);
// Remote content can't be repainted by us, so we multiply down
// the resolution that our container expects onto our container.
m.PreScale(aContainerParameters.mXScale, aContainerParameters.mYScale, 1.0);
layer->SetBaseTransform(m);
return layer.forget();
}
void
RenderFrameParent::OwnerContentChanged(nsIContent* aContent)
{
MOZ_ASSERT(!mFrameLoader || mFrameLoader->GetOwnerContent() == aContent,
"Don't build new map if owner is same!");
RefPtr<LayerManager> lm = mFrameLoader ? GetFrom(mFrameLoader) : nullptr;
// Perhaps the document containing this frame currently has no presentation?
if (lm && lm->GetBackendType() == LayersBackend::LAYERS_CLIENT) {
ClientLayerManager *clientManager =
static_cast<ClientLayerManager*>(lm.get());
clientManager->GetRemoteRenderer()->SendAdoptChild(mLayersId);
}
// The APZCTreeManager associated with this RenderFrameParent may have changed
// so reset it and let GetApzcTreeManager() pick it up again.
mApzcTreeManager = nullptr;
}
void
RenderFrameParent::ActorDestroy(ActorDestroyReason why)
{
if (mLayersId != 0) {
if (XRE_IsContentProcess()) {
ContentChild::GetSingleton()->SendDeallocateLayerTreeId(mLayersId);
} else {
CompositorParent::DeallocateLayerTreeId(mLayersId);
}
if (mContentController) {
// Stop our content controller from requesting repaints of our
// content.
mContentController->ClearRenderFrame();
// TODO: notify the compositor?
}
}
mFrameLoader = nullptr;
}
bool
RenderFrameParent::RecvNotifyCompositorTransaction()
{
TriggerRepaint();
return true;
}
bool
RenderFrameParent::RecvUpdateHitRegion(const nsRegion& aRegion)
{
mTouchRegion = aRegion;
if (mContentController) {
// Tell the content controller about the touch-sensitive region, so
// that it can provide it to APZ. This is required for APZ to do
// correct hit testing for a remote 'mozpasspointerevents' iframe
// until bug 928833 is fixed.
mContentController->SetTouchSensitiveRegion(aRegion);
}
return true;
}
void
RenderFrameParent::TriggerRepaint()
{
nsIFrame* docFrame = mFrameLoader->GetPrimaryFrameOfOwningContent();
if (!docFrame) {
// Bad, but nothing we can do about it (XXX/cjones: or is there?
// maybe bug 589337?). When the new frame is created, we'll
// probably still be the current render frame and will get to draw
// our content then. Or, we're shutting down and this update goes
// to /dev/null.
return;
}
docFrame->InvalidateLayer(nsDisplayItem::TYPE_REMOTE);
}
uint64_t
RenderFrameParent::GetLayerTreeId() const
{
return mLayersId;
}
void
RenderFrameParent::BuildDisplayList(nsDisplayListBuilder* aBuilder,
nsSubDocumentFrame* aFrame,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists)
{
// We're the subdoc for <browser remote="true"> and it has
// painted content. Display its shadow layer tree.
DisplayListClipState::AutoSaveRestore clipState(aBuilder);
nsPoint offset = aBuilder->ToReferenceFrame(aFrame);
nsRect bounds = aFrame->EnsureInnerView()->GetBounds() + offset;
clipState.ClipContentDescendants(bounds);
aLists.Content()->AppendToTop(
new (aBuilder) nsDisplayRemote(aBuilder, aFrame, this));
}
void
RenderFrameParent::ZoomToRect(uint32_t aPresShellId, ViewID aViewId,
const CSSRect& aRect)
{
if (GetApzcTreeManager()) {
GetApzcTreeManager()->ZoomToRect(ScrollableLayerGuid(mLayersId, aPresShellId, aViewId),
aRect);
}
}
void
RenderFrameParent::ContentReceivedInputBlock(const ScrollableLayerGuid& aGuid,
uint64_t aInputBlockId,
bool aPreventDefault)
{
if (aGuid.mLayersId != mLayersId) {
// Guard against bad data from hijacked child processes
NS_ERROR("Unexpected layers id in ContentReceivedInputBlock; dropping message...");
return;
}
if (GetApzcTreeManager()) {
APZThreadUtils::RunOnControllerThread(NewRunnableMethod(
GetApzcTreeManager(), &APZCTreeManager::ContentReceivedInputBlock,
aInputBlockId, aPreventDefault));
}
}
void
RenderFrameParent::SetTargetAPZC(uint64_t aInputBlockId,
const nsTArray<ScrollableLayerGuid>& aTargets)
{
for (size_t i = 0; i < aTargets.Length(); i++) {
if (aTargets[i].mLayersId != mLayersId) {
// Guard against bad data from hijacked child processes
NS_ERROR("Unexpected layers id in SetTargetAPZC; dropping message...");
return;
}
}
if (GetApzcTreeManager()) {
// need a local var to disambiguate between the SetTargetAPZC overloads.
void (APZCTreeManager::*setTargetApzcFunc)(uint64_t, const nsTArray<ScrollableLayerGuid>&)
= &APZCTreeManager::SetTargetAPZC;
APZThreadUtils::RunOnControllerThread(NewRunnableMethod(
GetApzcTreeManager(), setTargetApzcFunc,
aInputBlockId, aTargets));
}
}
void
RenderFrameParent::SetAllowedTouchBehavior(uint64_t aInputBlockId,
const nsTArray<TouchBehaviorFlags>& aFlags)
{
if (GetApzcTreeManager()) {
APZThreadUtils::RunOnControllerThread(NewRunnableMethod(
GetApzcTreeManager(), &APZCTreeManager::SetAllowedTouchBehavior,
aInputBlockId, aFlags));
}
}
void
RenderFrameParent::UpdateZoomConstraints(uint32_t aPresShellId,
ViewID aViewId,
const Maybe<ZoomConstraints>& aConstraints)
{
if (GetApzcTreeManager()) {
GetApzcTreeManager()->UpdateZoomConstraints(ScrollableLayerGuid(mLayersId, aPresShellId, aViewId),
aConstraints);
}
}
bool
RenderFrameParent::HitTest(const nsRect& aRect)
{
return mTouchRegion.Contains(aRect);
}
void
RenderFrameParent::StartScrollbarDrag(const AsyncDragMetrics& aDragMetrics)
{
if (GetApzcTreeManager()) {
uint64_t layersId = GetLayersId();
ScrollableLayerGuid guid(layersId, aDragMetrics.mPresShellId,
aDragMetrics.mViewId);
APZThreadUtils::RunOnControllerThread(
NewRunnableMethod(GetApzcTreeManager(),
&APZCTreeManager::StartScrollbarDrag,
guid, aDragMetrics));
}
}
void
RenderFrameParent::GetTextureFactoryIdentifier(TextureFactoryIdentifier* aTextureFactoryIdentifier)
{
RefPtr<LayerManager> lm = mFrameLoader ? GetFrom(mFrameLoader) : nullptr;
// Perhaps the document containing this frame currently has no presentation?
if (lm && lm->GetBackendType() == LayersBackend::LAYERS_CLIENT) {
*aTextureFactoryIdentifier =
static_cast<ClientLayerManager*>(lm.get())->GetTextureFactoryIdentifier();
} else {
*aTextureFactoryIdentifier = TextureFactoryIdentifier();
}
}
void
RenderFrameParent::TakeFocusForClickFromTap()
{
nsIFocusManager* fm = nsFocusManager::GetFocusManager();
if (!fm) {
return;
}
nsCOMPtr<nsIContent> owner = mFrameLoader->GetOwnerContent();
if (!owner) {
return;
}
nsCOMPtr<nsIDOMElement> element = do_QueryInterface(owner);
if (!element) {
return;
}
fm->SetFocus(element, nsIFocusManager::FLAG_BYMOUSE |
nsIFocusManager::FLAG_BYTOUCH |
nsIFocusManager::FLAG_NOSCROLL);
}
} // namespace layout
} // namespace mozilla
nsDisplayRemote::nsDisplayRemote(nsDisplayListBuilder* aBuilder,
nsSubDocumentFrame* aFrame,
RenderFrameParent* aRemoteFrame)
: nsDisplayItem(aBuilder, aFrame)
, mRemoteFrame(aRemoteFrame)
, mEventRegionsOverride(EventRegionsOverride::NoOverride)
{
if (aBuilder->IsBuildingLayerEventRegions()) {
bool frameIsPointerEventsNone = !aFrame->PassPointerEventsToChildren()
&& (aFrame->StyleVisibility()->GetEffectivePointerEvents(aFrame) == NS_STYLE_POINTER_EVENTS_NONE);
if (aBuilder->IsInsidePointerEventsNoneDoc() || frameIsPointerEventsNone) {
mEventRegionsOverride |= EventRegionsOverride::ForceEmptyHitRegion;
}
if (nsLayoutUtils::HasDocumentLevelListenersForApzAwareEvents(aFrame->PresContext()->PresShell())) {
mEventRegionsOverride |= EventRegionsOverride::ForceDispatchToContent;
}
}
}
already_AddRefed<Layer>
nsDisplayRemote::BuildLayer(nsDisplayListBuilder* aBuilder,
LayerManager* aManager,
const ContainerLayerParameters& aContainerParameters)
{
int32_t appUnitsPerDevPixel = mFrame->PresContext()->AppUnitsPerDevPixel();
nsIntRect visibleRect = GetVisibleRect().ToNearestPixels(appUnitsPerDevPixel);
visibleRect += aContainerParameters.mOffset;
RefPtr<Layer> layer = mRemoteFrame->BuildLayer(aBuilder, mFrame, aManager, visibleRect, this, aContainerParameters);
if (layer && layer->AsContainerLayer()) {
layer->AsContainerLayer()->SetEventRegionsOverride(mEventRegionsOverride);
}
return layer.forget();
}
void
nsDisplayRemote::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames)
{
if (mRemoteFrame->HitTest(aRect)) {
aOutFrames->AppendElement(mFrame);
}
}
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