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gecko/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 "gfx3DMatrix.h"
#include "LayerManagerOGL.h"
#ifdef MOZ_ENABLE_D3D9_LAYER
# include "LayerManagerD3D9.h"
#endif //MOZ_ENABLE_D3D9_LAYER
#include "mozilla/BrowserElementParent.h"
#include "mozilla/dom/TabParent.h"
#include "mozilla/layers/APZCTreeManager.h"
#include "mozilla/layers/CompositorParent.h"
#include "mozilla/layers/LayerTransactionParent.h"
#include "nsContentUtils.h"
#include "nsFrameLoader.h"
#include "nsIObserver.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"
typedef nsContentView::ViewConfig ViewConfig;
using namespace mozilla::dom;
using namespace mozilla::layers;
namespace mozilla {
namespace layout {
typedef FrameMetrics::ViewID ViewID;
typedef RenderFrameParent::ViewMap ViewMap;
// Represents (affine) transforms that are calculated from a content view.
struct ViewTransform {
ViewTransform(nsIntPoint aTranslation = nsIntPoint(0, 0), float aXScale = 1, float aYScale = 1)
: mTranslation(aTranslation)
, mXScale(aXScale)
, mYScale(aYScale)
{}
operator gfx3DMatrix() const
{
return
gfx3DMatrix::Translation(mTranslation.x, mTranslation.y, 0) *
gfx3DMatrix::ScalingMatrix(mXScale, mYScale, 1);
}
nsIntPoint mTranslation;
float mXScale;
float mYScale;
};
// Matrix helpers
// For our simple purposes, these helpers apply to 2D affine transformations
// that can be represented by a scale and a translation. This makes the math
// much easier because we only expect the diagonals and the translation
// coordinates of the matrix to be non-zero.
static double GetXScale(const gfx3DMatrix& aTransform)
{
return aTransform._11;
}
static double GetYScale(const gfx3DMatrix& aTransform)
{
return aTransform._22;
}
static void Scale(gfx3DMatrix& aTransform, double aXScale, double aYScale)
{
aTransform._11 *= aXScale;
aTransform._22 *= aYScale;
}
static void ReverseTranslate(gfx3DMatrix& aTransform, const gfxPoint& aOffset)
{
aTransform._41 -= aOffset.x;
aTransform._42 -= aOffset.y;
}
static void ApplyTransform(nsRect& aRect,
gfx3DMatrix& aTransform,
nscoord auPerDevPixel)
{
aRect.x = aRect.x * aTransform._11 + aTransform._41 * auPerDevPixel;
aRect.y = aRect.y * aTransform._22 + aTransform._42 * auPerDevPixel;
aRect.width = aRect.width * aTransform._11;
aRect.height = aRect.height * aTransform._22;
}
static void
AssertInTopLevelChromeDoc(ContainerLayer* aContainer,
nsIFrame* aContainedFrame)
{
NS_ASSERTION(
(aContainer->Manager()->GetBackendType() != mozilla::layers::LAYERS_BASIC) ||
(aContainedFrame->GetNearestWidget() ==
static_cast<BasicLayerManager*>(aContainer->Manager())->GetRetainerWidget()),
"Expected frame to be in top-level chrome document");
}
// Return view for given ID in aArray, NULL if not found.
static nsContentView*
FindViewForId(const ViewMap& aMap, ViewID aId)
{
ViewMap::const_iterator iter = aMap.find(aId);
return iter != aMap.end() ? iter->second : NULL;
}
static const FrameMetrics*
GetFrameMetrics(Layer* aLayer)
{
ContainerLayer* container = aLayer->AsContainerLayer();
return container ? &container->GetFrameMetrics() : NULL;
}
/**
* 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->GetContentRect().TopLeft() - aContainerFrame->GetPosition());
return frameOffset.ToNearestPixels(auPerDevPixel);
}
// Compute the transform of the shadow tree contained by
// |aContainerFrame| to widget space. We transform because the
// subprocess layer manager renders to a different top-left than where
// the shadow tree is drawn here and because a scale can be set on the
// shadow tree.
static ViewTransform
ComputeShadowTreeTransform(nsIFrame* aContainerFrame,
nsFrameLoader* aRootFrameLoader,
const FrameMetrics* aMetrics,
const ViewConfig& aConfig,
float aTempScaleX = 1.0,
float aTempScaleY = 1.0)
{
// |aMetrics->mViewportScrollOffset| The frame's scroll offset when it was
// painted, in content document pixels.
// |aConfig.mScrollOffset| What our user expects, or wants, the
// frame scroll offset to be in chrome
// document app units.
//
// So we set a compensating translation that moves the content document
// pixels to where the user wants them to be.
//
nscoord auPerDevPixel = aContainerFrame->PresContext()->AppUnitsPerDevPixel();
nsIntPoint scrollOffset =
aConfig.mScrollOffset.ToNearestPixels(auPerDevPixel);
LayerIntPoint metricsScrollOffset = RoundedToInt(aMetrics->GetScrollOffsetInLayerPixels());
if (aRootFrameLoader->AsyncScrollEnabled() && !aMetrics->mDisplayPort.IsEmpty()) {
// Only use asynchronous scrolling if it is enabled and there is a
// displayport defined. It is useful to have a scroll layer that is
// synchronously scrolled for identifying a scroll area before it is
// being actively scrolled.
nsIntPoint scrollCompensation(
(scrollOffset.x / aTempScaleX - metricsScrollOffset.x),
(scrollOffset.y / aTempScaleY - metricsScrollOffset.y));
return ViewTransform(-scrollCompensation, aConfig.mXScale, aConfig.mYScale);
} else {
return ViewTransform(nsIntPoint(0, 0), 1, 1);
}
}
// Use shadow layer tree to build display list for the browser's frame.
static void
BuildListForLayer(Layer* aLayer,
nsFrameLoader* aRootFrameLoader,
const gfx3DMatrix& aTransform,
nsDisplayListBuilder* aBuilder,
nsDisplayList& aShadowTree,
nsIFrame* aSubdocFrame)
{
const FrameMetrics* metrics = GetFrameMetrics(aLayer);
gfx3DMatrix transform;
if (metrics && metrics->IsScrollable()) {
const ViewID scrollId = metrics->mScrollId;
// We need to figure out the bounds of the scrollable region using the
// shadow layer tree from the remote process. The metrics viewport is
// defined based on all the transformations of its parent layers and
// the scale of the current layer.
// Calculate transform for this layer.
nsContentView* view =
aRootFrameLoader->GetCurrentRemoteFrame()->GetContentView(scrollId);
// XXX why don't we include aLayer->GetTransform() in the inverse-scale here?
// This seems wrong, but it doesn't seem to cause bugs!
gfx3DMatrix applyTransform = ComputeShadowTreeTransform(
aSubdocFrame, aRootFrameLoader, metrics, view->GetViewConfig(),
1 / GetXScale(aTransform), 1 / GetYScale(aTransform));
transform = applyTransform * aLayer->GetTransform() * aTransform;
// As mentioned above, bounds calculation also depends on the scale
// of this layer.
gfx3DMatrix tmpTransform = aTransform;
Scale(tmpTransform, GetXScale(applyTransform), GetYScale(applyTransform));
// Calculate rect for this layer based on aTransform.
nsRect bounds;
{
bounds = CSSRect::ToAppUnits(metrics->mViewport);
nscoord auPerDevPixel = aSubdocFrame->PresContext()->AppUnitsPerDevPixel();
ApplyTransform(bounds, tmpTransform, auPerDevPixel);
}
aShadowTree.AppendToTop(
new (aBuilder) nsDisplayRemoteShadow(aBuilder, aSubdocFrame, bounds, scrollId));
} else {
transform = aLayer->GetTransform() * aTransform;
}
for (Layer* child = aLayer->GetFirstChild(); child;
child = child->GetNextSibling()) {
BuildListForLayer(child, aRootFrameLoader, transform,
aBuilder, aShadowTree, aSubdocFrame);
}
}
// Go down shadow layer tree and apply transformations for scrollable layers.
static void
TransformShadowTree(nsDisplayListBuilder* aBuilder, nsFrameLoader* aFrameLoader,
nsIFrame* aFrame, Layer* aLayer,
const ViewTransform& aTransform,
float aTempScaleDiffX = 1.0,
float aTempScaleDiffY = 1.0)
{
LayerComposite* shadow = aLayer->AsLayerComposite();
shadow->SetShadowClipRect(aLayer->GetClipRect());
shadow->SetShadowVisibleRegion(aLayer->GetVisibleRegion());
shadow->SetShadowOpacity(aLayer->GetOpacity());
const FrameMetrics* metrics = GetFrameMetrics(aLayer);
gfx3DMatrix shadowTransform = aLayer->GetTransform();
ViewTransform layerTransform = aTransform;
if (metrics && metrics->IsScrollable()) {
const ViewID scrollId = metrics->mScrollId;
const nsContentView* view =
aFrameLoader->GetCurrentRemoteFrame()->GetContentView(scrollId);
NS_ABORT_IF_FALSE(view, "Array of views should be consistent with layer tree");
const gfx3DMatrix& currentTransform = aLayer->GetTransform();
const ViewConfig& config = view->GetViewConfig();
// With temporary scale we should compensate translation
// using temporary scale value
aTempScaleDiffX *= GetXScale(shadowTransform) * config.mXScale;
aTempScaleDiffY *= GetYScale(shadowTransform) * config.mYScale;
ViewTransform viewTransform = ComputeShadowTreeTransform(
aFrame, aFrameLoader, metrics, view->GetViewConfig(),
aTempScaleDiffX, aTempScaleDiffY
);
// Apply the layer's own transform *before* the view transform
shadowTransform = gfx3DMatrix(viewTransform) * currentTransform;
layerTransform = viewTransform;
if (metrics->IsRootScrollable()) {
// Apply the translation *before* we do the rest of the transforms.
nsIntPoint offset = GetContentRectLayerOffset(aFrame, aBuilder);
shadowTransform = shadowTransform *
gfx3DMatrix::Translation(float(offset.x), float(offset.y), 0.0);
}
}
if (aLayer->GetIsFixedPosition() &&
!aLayer->GetParent()->GetIsFixedPosition()) {
// Alter the shadow transform of fixed position layers in the situation
// that the view transform's scroll position doesn't match the actual
// scroll position, due to asynchronous layer scrolling.
float offsetX = layerTransform.mTranslation.x;
float offsetY = layerTransform.mTranslation.y;
ReverseTranslate(shadowTransform, gfxPoint(offsetX, offsetY));
const nsIntRect* clipRect = shadow->GetShadowClipRect();
if (clipRect) {
nsIntRect transformedClipRect(*clipRect);
transformedClipRect.MoveBy(-offsetX, -offsetY);
shadow->SetShadowClipRect(&transformedClipRect);
}
}
// The transform already takes the resolution scale into account. Since we
// will apply the resolution scale again when computing the effective
// transform, we must apply the inverse resolution scale here.
if (ContainerLayer* c = aLayer->AsContainerLayer()) {
shadowTransform.Scale(1.0f/c->GetPreXScale(),
1.0f/c->GetPreYScale(),
1);
}
shadowTransform.ScalePost(1.0f/aLayer->GetPostXScale(),
1.0f/aLayer->GetPostYScale(),
1);
shadow->SetShadowTransform(shadowTransform);
for (Layer* child = aLayer->GetFirstChild();
child; child = child->GetNextSibling()) {
TransformShadowTree(aBuilder, aFrameLoader, aFrame, child, layerTransform,
aTempScaleDiffX, aTempScaleDiffY);
}
}
static void
ClearContainer(ContainerLayer* aContainer)
{
while (Layer* layer = aContainer->GetFirstChild()) {
aContainer->RemoveChild(layer);
}
}
// 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::LAYERS_BASIC == aManager->GetBackendType() &&
!static_cast<BasicLayerManager*>(aManager)->IsRetained());
}
// Recursively create a new array of scrollables, preserving any scrollables
// that are still in the layer tree.
//
// aXScale and aYScale are used to calculate any values that need to be in
// chrome-document CSS pixels and aren't part of the rendering loop, such as
// the initial scroll offset for a new view.
static void
BuildViewMap(ViewMap& oldContentViews, ViewMap& newContentViews,
nsFrameLoader* aFrameLoader, Layer* aLayer,
float aXScale = 1, float aYScale = 1,
float aAccConfigXScale = 1, float aAccConfigYScale = 1)
{
ContainerLayer* container = aLayer->AsContainerLayer();
if (!container)
return;
const FrameMetrics metrics = container->GetFrameMetrics();
const ViewID scrollId = metrics.mScrollId;
const gfx3DMatrix transform = aLayer->GetTransform();
aXScale *= GetXScale(transform);
aYScale *= GetYScale(transform);
if (metrics.IsScrollable()) {
nscoord auPerDevPixel = aFrameLoader->GetPrimaryFrameOfOwningContent()
->PresContext()->AppUnitsPerDevPixel();
nscoord auPerCSSPixel = auPerDevPixel * metrics.mDevPixelsPerCSSPixel.scale;
nsContentView* view = FindViewForId(oldContentViews, scrollId);
if (view) {
// View already exists. Be sure to propagate scales for any values
// that need to be calculated something in chrome-doc CSS pixels.
ViewConfig config = view->GetViewConfig();
aXScale *= config.mXScale;
aYScale *= config.mYScale;
view->mFrameLoader = aFrameLoader;
// If scale has changed, then we should update
// current scroll offset to new scaled value
if (aAccConfigXScale != view->mParentScaleX ||
aAccConfigYScale != view->mParentScaleY) {
float xscroll = 0, yscroll = 0;
view->GetScrollX(&xscroll);
view->GetScrollY(&yscroll);
xscroll = xscroll * (aAccConfigXScale / view->mParentScaleX);
yscroll = yscroll * (aAccConfigYScale / view->mParentScaleY);
view->ScrollTo(xscroll, yscroll);
view->mParentScaleX = aAccConfigXScale;
view->mParentScaleY = aAccConfigYScale;
}
// Collect only config scale values for scroll compensation
aAccConfigXScale *= config.mXScale;
aAccConfigYScale *= config.mYScale;
} else {
// View doesn't exist, so generate one. We start the view scroll offset at
// the same position as the framemetric's scroll offset from the layer.
// The default scale is 1, so no need to propagate scale down.
ViewConfig config;
config.mScrollOffset = nsPoint(
NSIntPixelsToAppUnits(metrics.mScrollOffset.x, auPerCSSPixel) * aXScale,
NSIntPixelsToAppUnits(metrics.mScrollOffset.y, auPerCSSPixel) * aYScale);
view = new nsContentView(aFrameLoader, scrollId, config);
view->mParentScaleX = aAccConfigXScale;
view->mParentScaleY = aAccConfigYScale;
}
// I don't know what units mViewportSize is in, hence use ToUnknownRect
// here to mark the current frontier in type info propagation
gfx::Rect viewport = metrics.mViewport.ToUnknownRect();
view->mViewportSize = nsSize(
NSIntPixelsToAppUnits(viewport.width, auPerDevPixel) * aXScale,
NSIntPixelsToAppUnits(viewport.height, auPerDevPixel) * aYScale);
view->mContentSize = nsSize(
NSFloatPixelsToAppUnits(metrics.mScrollableRect.width, auPerCSSPixel) * aXScale,
NSFloatPixelsToAppUnits(metrics.mScrollableRect.height, auPerCSSPixel) * aYScale);
newContentViews[scrollId] = view;
}
for (Layer* child = aLayer->GetFirstChild();
child; child = child->GetNextSibling()) {
BuildViewMap(oldContentViews, newContentViews, aFrameLoader, child,
aXScale, aYScale, aAccConfigXScale, aAccConfigYScale);
}
}
static void
BuildBackgroundPatternFor(ContainerLayer* aContainer,
Layer* aShadowRoot,
const ViewConfig& aConfig,
const gfxRGBA& aColor,
LayerManager* aManager,
nsIFrame* aFrame)
{
LayerComposite* shadowRoot = aShadowRoot->AsLayerComposite();
gfxMatrix t;
if (!shadowRoot->GetShadowTransform().Is2D(&t)) {
return;
}
// Get the rect bounding the shadow content, transformed into the
// same space as |aFrame|
nsIntRect contentBounds = shadowRoot->GetShadowVisibleRegion().GetBounds();
gfxRect contentVis(contentBounds.x, contentBounds.y,
contentBounds.width, contentBounds.height);
gfxRect localContentVis(t.Transform(contentVis));
// Round *in* here because this area is punched out of the background
localContentVis.RoundIn();
nsIntRect localIntContentVis(localContentVis.X(), localContentVis.Y(),
localContentVis.Width(), localContentVis.Height());
// Get the frame's rect
nscoord auPerDevPixel = aFrame->PresContext()->AppUnitsPerDevPixel();
nsIntRect frameRect = aFrame->GetRect().ToOutsidePixels(auPerDevPixel);
// If the shadow tree covers the frame rect, don't bother building
// the background, it wouldn't be visible
if (localIntContentVis.Contains(frameRect)) {
return;
}
nsRefPtr<ColorLayer> layer = aManager->CreateColorLayer();
layer->SetColor(aColor);
// The visible area of the background is the frame's area minus the
// content area
nsIntRegion bgRgn(frameRect);
bgRgn.Sub(bgRgn, localIntContentVis);
bgRgn.MoveBy(-frameRect.TopLeft());
layer->SetVisibleRegion(bgRgn);
aContainer->InsertAfter(layer, nullptr);
}
already_AddRefed<LayerManager>
GetFrom(nsFrameLoader* aFrameLoader)
{
nsIDocument* doc = aFrameLoader->GetOwnerDoc();
return nsContentUtils::LayerManagerForDocument(doc);
}
class RemoteContentController : public GeckoContentController {
public:
RemoteContentController(RenderFrameParent* aRenderFrame)
: mUILoop(MessageLoop::current())
, mRenderFrame(aRenderFrame)
, mHaveZoomConstraints(false)
, mAllowZoom(true)
{ }
virtual void RequestContentRepaint(const FrameMetrics& aFrameMetrics) MOZ_OVERRIDE
{
// We always need to post requests into the "UI thread" otherwise the
// requests may get processed out of order.
mUILoop->PostTask(
FROM_HERE,
NewRunnableMethod(this, &RemoteContentController::DoRequestContentRepaint,
aFrameMetrics));
}
virtual void HandleDoubleTap(const CSSIntPoint& aPoint) MOZ_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));
return;
}
if (mRenderFrame) {
TabParent* browser = static_cast<TabParent*>(mRenderFrame->Manager());
browser->HandleDoubleTap(aPoint);
}
}
virtual void HandleSingleTap(const CSSIntPoint& aPoint) MOZ_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));
return;
}
if (mRenderFrame) {
TabParent* browser = static_cast<TabParent*>(mRenderFrame->Manager());
browser->HandleSingleTap(aPoint);
}
}
virtual void HandleLongTap(const CSSIntPoint& aPoint) MOZ_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));
return;
}
if (mRenderFrame) {
TabParent* browser = static_cast<TabParent*>(mRenderFrame->Manager());
browser->HandleLongTap(aPoint);
}
}
void ClearRenderFrame() { mRenderFrame = nullptr; }
virtual void SendAsyncScrollDOMEvent(FrameMetrics::ViewID aScrollId,
const CSSRect& aContentRect,
const CSSSize& aContentSize) MOZ_OVERRIDE
{
if (MessageLoop::current() != mUILoop) {
mUILoop->PostTask(
FROM_HERE,
NewRunnableMethod(this,
&RemoteContentController::SendAsyncScrollDOMEvent,
aScrollId, aContentRect, aContentSize));
return;
}
if (mRenderFrame && aScrollId == FrameMetrics::ROOT_SCROLL_ID) {
TabParent* browser = static_cast<TabParent*>(mRenderFrame->Manager());
BrowserElementParent::DispatchAsyncScrollEvent(browser, aContentRect,
aContentSize);
}
}
virtual void PostDelayedTask(Task* aTask, int aDelayMs) MOZ_OVERRIDE
{
MessageLoop::current()->PostDelayedTask(FROM_HERE, aTask, aDelayMs);
}
void SaveZoomConstraints(bool aAllowZoom,
const CSSToScreenScale& aMinZoom,
const CSSToScreenScale& aMaxZoom)
{
mHaveZoomConstraints = true;
mAllowZoom = aAllowZoom;
mMinZoom = aMinZoom;
mMaxZoom = aMaxZoom;
}
virtual bool GetZoomConstraints(bool* aOutAllowZoom,
CSSToScreenScale* aOutMinZoom,
CSSToScreenScale* aOutMaxZoom)
{
if (mHaveZoomConstraints) {
*aOutAllowZoom = mAllowZoom;
*aOutMinZoom = mMinZoom;
*aOutMaxZoom = mMaxZoom;
}
return mHaveZoomConstraints;
}
private:
void DoRequestContentRepaint(const FrameMetrics& aFrameMetrics)
{
if (mRenderFrame) {
TabParent* browser = static_cast<TabParent*>(mRenderFrame->Manager());
browser->UpdateFrame(aFrameMetrics);
}
}
MessageLoop* mUILoop;
RenderFrameParent* mRenderFrame;
bool mHaveZoomConstraints;
bool mAllowZoom;
CSSToScreenScale mMinZoom;
CSSToScreenScale mMaxZoom;
};
RenderFrameParent::RenderFrameParent(nsFrameLoader* aFrameLoader,
ScrollingBehavior aScrollingBehavior,
TextureFactoryIdentifier* aTextureFactoryIdentifier,
uint64_t* aId)
: mLayersId(0)
, mFrameLoader(aFrameLoader)
, mFrameLoaderDestroyed(false)
, mBackgroundColor(gfxRGBA(1, 1, 1))
{
mContentViews[FrameMetrics::ROOT_SCROLL_ID] =
new nsContentView(aFrameLoader, FrameMetrics::ROOT_SCROLL_ID);
*aId = 0;
nsRefPtr<LayerManager> lm = GetFrom(mFrameLoader);
// Perhaps the document containing this frame currently has no presentation?
if (lm && lm->GetBackendType() == LAYERS_CLIENT) {
*aTextureFactoryIdentifier = lm->GetTextureFactoryIdentifier();
} else {
*aTextureFactoryIdentifier = TextureFactoryIdentifier();
}
if (CompositorParent::CompositorLoop()) {
// 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() == LAYERS_CLIENT) {
ClientLayerManager *clientManager = static_cast<ClientLayerManager*>(lm.get());
clientManager->GetRemoteRenderer()->SendNotifyChildCreated(mLayersId);
}
if (aScrollingBehavior == ASYNC_PAN_ZOOM) {
mContentController = new RemoteContentController(this);
CompositorParent::SetControllerForLayerTree(mLayersId, mContentController);
}
}
// Set a default RenderFrameParent
mFrameLoader->SetCurrentRemoteFrame(this);
}
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.
if (!mApzcTreeManager) {
mApzcTreeManager = CompositorParent::GetAPZCTreeManager(mLayersId);
}
return mApzcTreeManager.get();
}
RenderFrameParent::~RenderFrameParent()
{}
void
RenderFrameParent::Destroy()
{
size_t numChildren = ManagedPLayerTransactionParent().Length();
NS_ABORT_IF_FALSE(0 == numChildren || 1 == numChildren,
"render frame must only have 0 or 1 layer manager");
if (numChildren) {
LayerTransactionParent* layers =
static_cast<LayerTransactionParent*>(ManagedPLayerTransactionParent()[0]);
layers->Destroy();
}
mFrameLoaderDestroyed = true;
}
nsContentView*
RenderFrameParent::GetContentView(ViewID aId)
{
return FindViewForId(mContentViews, aId);
}
void
RenderFrameParent::ContentViewScaleChanged(nsContentView* aView)
{
// Since the scale has changed for a view, it and its descendents need their
// shadow-space attributes updated. It's easiest to rebuild the view map.
BuildViewMap();
}
void
RenderFrameParent::ShadowLayersUpdated(LayerTransactionParent* aLayerTree,
const TargetConfig& aTargetConfig,
bool isFirstPaint)
{
// View map must only contain views that are associated with the current
// shadow layer tree. We must always update the map when shadow layers
// are updated.
BuildViewMap();
TriggerRepaint();
}
already_AddRefed<Layer>
RenderFrameParent::BuildLayer(nsDisplayListBuilder* aBuilder,
nsIFrame* aFrame,
LayerManager* aManager,
const nsIntRect& aVisibleRect,
nsDisplayItem* aItem,
const ContainerParameters& aContainerParameters)
{
NS_ABORT_IF_FALSE(aFrame,
"makes no sense to have a shadow tree without a frame");
NS_ABORT_IF_FALSE(!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 NS_ABORT_IF_FALSE() above will flag it. Returning NULL
// here will just cause the shadow subtree not to be rendered.
NS_WARNING("Remote iframe not rendered");
return nullptr;
}
uint64_t id = GetLayerTreeId();
if (0 != id) {
MOZ_ASSERT(!GetRootLayer());
nsRefPtr<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);
layer->SetVisibleRegion(aVisibleRect - offset);
// 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());
gfx3DMatrix m =
gfx3DMatrix::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.Scale(aContainerParameters.mXScale, aContainerParameters.mYScale, 1.0);
layer->SetBaseTransform(m);
return layer.forget();
}
if (mContainer) {
ClearContainer(mContainer);
mContainer->SetPreScale(1.0f, 1.0f);
mContainer->SetPostScale(1.0f, 1.0f);
mContainer->SetInheritedScale(1.0f, 1.0f);
}
Layer* shadowRoot = GetRootLayer();
if (!shadowRoot) {
mContainer = nullptr;
return nullptr;
}
NS_ABORT_IF_FALSE(!shadowRoot || shadowRoot->Manager() == aManager,
"retaining manager changed out from under us ... HELP!");
// Wrap the shadow layer tree in mContainer.
if (!mContainer) {
mContainer = aManager->CreateContainerLayer();
}
NS_ABORT_IF_FALSE(!mContainer->GetFirstChild(),
"container of shadow tree shouldn't have a 'root' here");
mContainer->InsertAfter(shadowRoot, nullptr);
AssertInTopLevelChromeDoc(mContainer, aFrame);
ViewTransform transform;
TransformShadowTree(aBuilder, mFrameLoader, aFrame, shadowRoot, transform);
mContainer->SetClipRect(nullptr);
if (mFrameLoader->AsyncScrollEnabled()) {
const nsContentView* view = GetContentView(FrameMetrics::ROOT_SCROLL_ID);
BuildBackgroundPatternFor(mContainer,
shadowRoot,
view->GetViewConfig(),
mBackgroundColor,
aManager, aFrame);
}
mContainer->SetVisibleRegion(aVisibleRect);
return nsRefPtr<Layer>(mContainer).forget();
}
void
RenderFrameParent::OwnerContentChanged(nsIContent* aContent)
{
NS_ABORT_IF_FALSE(mFrameLoader->GetOwnerContent() == aContent,
"Don't build new map if owner is same!");
BuildViewMap();
}
void
RenderFrameParent::NotifyInputEvent(const nsInputEvent& aEvent,
nsInputEvent* aOutEvent)
{
if (GetApzcTreeManager()) {
GetApzcTreeManager()->ReceiveInputEvent(aEvent, aOutEvent);
}
}
void
RenderFrameParent::NotifyDimensionsChanged(ScreenIntSize size)
{
if (GetApzcTreeManager()) {
GetApzcTreeManager()->UpdateCompositionBounds(ScrollableLayerGuid(mLayersId),
ScreenIntRect(ScreenIntPoint(), size));
}
}
void
RenderFrameParent::ActorDestroy(ActorDestroyReason why)
{
if (mLayersId != 0) {
CompositorParent::DeallocateLayerTreeId(mLayersId);
if (mContentController) {
// Stop our content controller from requesting repaints of our
// content.
mContentController->ClearRenderFrame();
// TODO: notify the compositor?
}
}
if (mFrameLoader && mFrameLoader->GetCurrentRemoteFrame() == this) {
// XXX this might cause some weird issues ... we'll just not
// redraw the part of the window covered by this until the "next"
// remote frame has a layer-tree transaction. For
// why==NormalShutdown, we'll definitely want to do something
// better, especially as nothing guarantees another Update() from
// the "next" remote layer tree.
mFrameLoader->SetCurrentRemoteFrame(nullptr);
}
mFrameLoader = nullptr;
}
bool
RenderFrameParent::RecvNotifyCompositorTransaction()
{
TriggerRepaint();
return true;
}
bool
RenderFrameParent::RecvCancelDefaultPanZoom()
{
if (GetApzcTreeManager()) {
GetApzcTreeManager()->CancelDefaultPanZoom(ScrollableLayerGuid(mLayersId));
}
return true;
}
bool
RenderFrameParent::RecvDetectScrollableSubframe()
{
if (GetApzcTreeManager()) {
GetApzcTreeManager()->DetectScrollableSubframe(ScrollableLayerGuid(mLayersId));
}
return true;
}
bool
RenderFrameParent::RecvUpdateHitRegion(const nsRegion& aRegion)
{
mTouchRegion = aRegion;
return true;
}
PLayerTransactionParent*
RenderFrameParent::AllocPLayerTransactionParent()
{
if (!mFrameLoader || mFrameLoaderDestroyed) {
return nullptr;
}
nsRefPtr<LayerManager> lm = GetFrom(mFrameLoader);
return new LayerTransactionParent(lm->AsLayerManagerComposite(), this, 0);
}
bool
RenderFrameParent::DeallocPLayerTransactionParent(PLayerTransactionParent* aLayers)
{
delete aLayers;
return true;
}
void
RenderFrameParent::BuildViewMap()
{
ViewMap newContentViews;
// BuildViewMap assumes we have a primary frame, which may not be the case.
if (GetRootLayer() && mFrameLoader->GetPrimaryFrameOfOwningContent()) {
// Some of the content views in our hash map may no longer be active. To
// tag them as inactive and to remove any chance of them using a dangling
// pointer, we set mContentView to NULL.
//
// BuildViewMap will restore mFrameLoader if the content view is still
// in our hash table.
for (ViewMap::const_iterator iter = mContentViews.begin();
iter != mContentViews.end();
++iter) {
iter->second->mFrameLoader = NULL;
}
mozilla::layout::BuildViewMap(mContentViews, newContentViews, mFrameLoader, GetRootLayer());
}
// Here, we guarantee that *only* the root view is preserved in
// case we couldn't build a new view map above. This is important because
// the content view map should only contain the root view and content
// views that are present in the layer tree.
if (newContentViews.empty()) {
newContentViews[FrameMetrics::ROOT_SCROLL_ID] =
FindViewForId(mContentViews, FrameMetrics::ROOT_SCROLL_ID);
}
mContentViews = newContentViews;
}
void
RenderFrameParent::TriggerRepaint()
{
mFrameLoader->SetCurrentRemoteFrame(this);
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);
}
LayerTransactionParent*
RenderFrameParent::GetShadowLayers() const
{
const InfallibleTArray<PLayerTransactionParent*>& shadowParents = ManagedPLayerTransactionParent();
NS_ABORT_IF_FALSE(shadowParents.Length() <= 1,
"can only support at most 1 LayerTransactionParent");
return (shadowParents.Length() == 1) ?
static_cast<LayerTransactionParent*>(shadowParents[0]) : nullptr;
}
uint64_t
RenderFrameParent::GetLayerTreeId() const
{
return mLayersId;
}
Layer*
RenderFrameParent::GetRootLayer() const
{
LayerTransactionParent* shadowLayers = GetShadowLayers();
return shadowLayers ? shadowLayers->GetRoot() : nullptr;
}
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);
Layer* container = GetRootLayer();
if (aBuilder->IsForEventDelivery() && container) {
ViewTransform offset =
ViewTransform(GetContentRectLayerOffset(aFrame, aBuilder));
BuildListForLayer(container, mFrameLoader, offset,
aBuilder, *aLists.Content(), aFrame);
} else {
aLists.Content()->AppendToTop(
new (aBuilder) nsDisplayRemote(aBuilder, aFrame, this));
}
}
void
RenderFrameParent::ZoomToRect(const CSSRect& aRect)
{
if (GetApzcTreeManager()) {
GetApzcTreeManager()->ZoomToRect(ScrollableLayerGuid(mLayersId),
aRect);
}
}
void
RenderFrameParent::ContentReceivedTouch(bool aPreventDefault)
{
if (GetApzcTreeManager()) {
GetApzcTreeManager()->ContentReceivedTouch(ScrollableLayerGuid(mLayersId),
aPreventDefault);
}
}
void
RenderFrameParent::UpdateZoomConstraints(bool aAllowZoom,
const CSSToScreenScale& aMinZoom,
const CSSToScreenScale& aMaxZoom)
{
if (mContentController) {
mContentController->SaveZoomConstraints(aAllowZoom, aMinZoom, aMaxZoom);
}
if (GetApzcTreeManager()) {
GetApzcTreeManager()->UpdateZoomConstraints(ScrollableLayerGuid(mLayersId),
aAllowZoom, aMinZoom, aMaxZoom);
}
}
void
RenderFrameParent::UpdateScrollOffset(uint32_t aPresShellId, ViewID aViewId, const CSSIntPoint& aScrollOffset)
{
if (GetApzcTreeManager()) {
GetApzcTreeManager()->UpdateScrollOffset(ScrollableLayerGuid(mLayersId, aPresShellId, aViewId),
aScrollOffset);
}
}
bool
RenderFrameParent::HitTest(const nsRect& aRect)
{
return mTouchRegion.Contains(aRect);
}
} // namespace layout
} // namespace mozilla
already_AddRefed<Layer>
nsDisplayRemote::BuildLayer(nsDisplayListBuilder* aBuilder,
LayerManager* aManager,
const ContainerParameters& aContainerParameters)
{
int32_t appUnitsPerDevPixel = mFrame->PresContext()->AppUnitsPerDevPixel();
nsIntRect visibleRect = GetVisibleRect().ToNearestPixels(appUnitsPerDevPixel);
visibleRect += aContainerParameters.mOffset;
nsRefPtr<Layer> layer = mRemoteFrame->BuildLayer(aBuilder, mFrame, aManager, visibleRect, this, aContainerParameters);
return layer.forget();
}
void
nsDisplayRemote::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames)
{
if (mRemoteFrame->HitTest(aRect)) {
aOutFrames->AppendElement(mFrame);
}
}
void
nsDisplayRemoteShadow::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames)
{
// If we are here, then rects have intersected.
//
// XXX I think iframes and divs can be rounded like anything else but we don't
// cover that case here.
//
if (aState->mShadows) {
aState->mShadows->AppendElement(mId);
}
}
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