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7cbe6380ff
gecko/layout/ipc/RenderFrameParent.cpp
Robert O'Callahan 7cbe6380ff Bug 841192. Part 14: Convert all usage of nsDisplayClip(RoundedRect) to use DisplayListClipState/DisplayItemClip. r=mattwoodrow 
This patch does several things. Sorry.

In BuildDisplayList implementations, instead of wrapping display items in nsDisplayClip, we
push clip state onto the nsDisplayListBuilder and give the display items an
explicit clip when they're created.

In FrameLayerBuilder, we use the explicit clips we find on display items instead of
computing our own.

We remove nsDisplayClip and everything that depends on it.

We remove ExplodeAnonymousChildLists. With nsDisplayClip gone, and
nsDisplayOptionEventGrabber removed in a previous patch, there are no
anonymous child lists.

nsDisplayItem::TryMerge implementations need to make sure they have the same
clip before being merged.

I ripped out the part of PruneDisplayListForExtraPage that adjusts clip rects.
As far as I can tell, it isn't actually necessary.

--HG--
extra : rebase_source : 6f3988b385d0ac54ab26fad10b12173884441f48
2013-03-04 22:56:02 +13:00

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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/AsyncPanZoomController.h"
#include "mozilla/layers/CompositorParent.h"
#include "mozilla/layers/ShadowLayersParent.h"
#include "nsContentUtils.h"
#include "nsFrameLoader.h"
#include "nsIObserver.h"
#include "nsSubDocumentFrame.h"
#include "nsViewportFrame.h"
#include "RenderFrameParent.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::ScalingMatrix(mXScale, mYScale, 1) *
gfx3DMatrix::Translation(mTranslation.x, mTranslation.y, 0);
}
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);
// metricsScrollOffset is in layer coordinates.
gfxPoint metricsScrollOffset = aMetrics->GetScrollOffsetInLayerPixels();
nsIntPoint roundedMetricsScrollOffset =
nsIntPoint(NS_lround(metricsScrollOffset.x), NS_lround(metricsScrollOffset.y));
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 - roundedMetricsScrollOffset.x) * aConfig.mXScale,
(scrollOffset.y / aTempScaleY - roundedMetricsScrollOffset.y) * aConfig.mYScale);
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;
{
nscoord auPerDevPixel = aSubdocFrame->PresContext()->AppUnitsPerDevPixel();
gfx::Rect viewport = metrics->mViewport;
bounds = nsIntRect(viewport.x, viewport.y,
viewport.width, viewport.height).ToAppUnits(auPerDevPixel);
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)
{
ShadowLayer* shadow = aLayer->AsShadowLayer();
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 / layerTransform.mXScale;
float offsetY = layerTransform.mTranslation.y / layerTransform.mYScale;
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;
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;
}
view->mViewportSize = nsSize(
NSIntPixelsToAppUnits(metrics.mViewport.width, auPerDevPixel) * aXScale,
NSIntPixelsToAppUnits(metrics.mViewport.height, auPerDevPixel) * aYScale);
view->mContentSize = nsSize(
NSIntPixelsToAppUnits(metrics.mContentRect.width, auPerDevPixel) * aXScale,
NSIntPixelsToAppUnits(metrics.mContentRect.height, auPerDevPixel) * 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,
ContainerLayer* aShadowRoot,
const ViewConfig& aConfig,
const gfxRGBA& aColor,
LayerManager* aManager,
nsIFrame* aFrame)
{
ShadowLayer* shadowRoot = aShadowRoot->AsShadowLayer();
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)
{ }
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 nsIntPoint& 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 nsIntPoint& 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 nsIntPoint& 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(const gfx::Rect& aContentRect,
const gfx::Size& aContentSize) MOZ_OVERRIDE
{
if (MessageLoop::current() != mUILoop) {
mUILoop->PostTask(
FROM_HERE,
NewRunnableMethod(this,
&RemoteContentController::SendAsyncScrollDOMEvent,
aContentRect, aContentSize));
return;
}
if (mRenderFrame) {
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);
}
private:
void DoRequestContentRepaint(const FrameMetrics& aFrameMetrics)
{
if (mRenderFrame) {
TabParent* browser = static_cast<TabParent*>(mRenderFrame->Manager());
browser->UpdateFrame(aFrameMetrics);
}
}
MessageLoop* mUILoop;
RenderFrameParent* mRenderFrame;
};
RenderFrameParent::RenderFrameParent(nsFrameLoader* aFrameLoader,
ScrollingBehavior aScrollingBehavior,
LayersBackend* aBackendType,
int* aMaxTextureSize,
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);
*aBackendType = mozilla::layers::LAYERS_NONE;
*aMaxTextureSize = 0;
*aId = 0;
nsRefPtr<LayerManager> lm = GetFrom(mFrameLoader);
// Perhaps the document containing this frame currently has no presentation?
if (lm) {
*aBackendType = lm->GetBackendType();
*aMaxTextureSize = lm->GetMaxTextureSize();
}
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 (aScrollingBehavior == ASYNC_PAN_ZOOM) {
mContentController = new RemoteContentController(this);
mPanZoomController = new AsyncPanZoomController(
mContentController, AsyncPanZoomController::USE_GESTURE_DETECTOR);
CompositorParent::SetPanZoomControllerForLayerTree(mLayersId,
mPanZoomController);
}
}
}
RenderFrameParent::~RenderFrameParent()
{}
void
RenderFrameParent::Destroy()
{
size_t numChildren = ManagedPLayersParent().Length();
NS_ABORT_IF_FALSE(0 == numChildren || 1 == numChildren,
"render frame must only have 0 or 1 layer manager");
if (numChildren) {
ShadowLayersParent* layers =
static_cast<ShadowLayersParent*>(ManagedPLayersParent()[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(ShadowLayersParent* 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);
layer->SetVisibleRegion(aVisibleRect);
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());
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);
}
ContainerLayer* 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 (mPanZoomController) {
mPanZoomController->ReceiveInputEvent(aEvent, aOutEvent);
}
}
void
RenderFrameParent::NotifyDimensionsChanged(int width, int height)
{
if (mPanZoomController) {
mPanZoomController->UpdateCompositionBounds(
nsIntRect(0, 0, width, height));
}
}
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();
mPanZoomController->Destroy();
}
}
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 (mPanZoomController) {
mPanZoomController->CancelDefaultPanZoom();
}
return true;
}
bool
RenderFrameParent::RecvDetectScrollableSubframe()
{
if (mPanZoomController) {
mPanZoomController->DetectScrollableSubframe();
}
return true;
}
PLayersParent*
RenderFrameParent::AllocPLayers()
{
if (!mFrameLoader || mFrameLoaderDestroyed) {
return nullptr;
}
nsRefPtr<LayerManager> lm = GetFrom(mFrameLoader);
return new ShadowLayersParent(lm->AsShadowManager(), this, 0);
}
bool
RenderFrameParent::DeallocPLayers(PLayersParent* 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->SchedulePaint();
}
ShadowLayersParent*
RenderFrameParent::GetShadowLayers() const
{
const InfallibleTArray<PLayersParent*>& shadowParents = ManagedPLayersParent();
NS_ABORT_IF_FALSE(shadowParents.Length() <= 1,
"can only support at most 1 ShadowLayersParent");
return (shadowParents.Length() == 1) ?
static_cast<ShadowLayersParent*>(shadowParents[0]) : nullptr;
}
uint64_t
RenderFrameParent::GetLayerTreeId() const
{
return mLayersId;
}
ContainerLayer*
RenderFrameParent::GetRootLayer() const
{
ShadowLayersParent* 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 saveClip(aBuilder->ClipState());
nsPoint offset = aBuilder->ToReferenceFrame(aFrame);
nsRect bounds = aFrame->EnsureInnerView()->GetBounds() + offset;
DisplayItemClip clipOnStack;
aBuilder->ClipState().ClipContentDescendants(bounds, clipOnStack);
ContainerLayer* container = GetRootLayer();
if (aBuilder->IsForEventDelivery() && container) {
ViewTransform offset =
ViewTransform(GetContentRectLayerOffset(aFrame, aBuilder), 1, 1);
BuildListForLayer(container, mFrameLoader, offset,
aBuilder, *aLists.Content(), aFrame);
} else {
aLists.Content()->AppendToTop(
new (aBuilder) nsDisplayRemote(aBuilder, aFrame, this));
}
}
void
RenderFrameParent::ZoomToRect(const gfxRect& aRect)
{
if (mPanZoomController) {
mPanZoomController->ZoomToRect(aRect);
}
}
void
RenderFrameParent::ContentReceivedTouch(bool aPreventDefault)
{
if (mPanZoomController) {
mPanZoomController->ContentReceivedTouch(aPreventDefault);
}
}
void
RenderFrameParent::UpdateZoomConstraints(bool aAllowZoom, float aMinZoom, float aMaxZoom)
{
if (mPanZoomController) {
mPanZoomController->UpdateZoomConstraints(aAllowZoom, aMinZoom, aMaxZoom);
}
}
} // 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
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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