/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- * vim: sw=2 ts=8 et : */ /* ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at: * http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is Mozilla Code. * * The Initial Developer of the Original Code is * The Mozilla Foundation * Portions created by the Initial Developer are Copyright (C) 2010 * the Initial Developer. All Rights Reserved. * * Contributor(s): * Chris Jones * * Alternatively, the contents of this file may be used under the terms of * either the GNU General Public License Version 2 or later (the "GPL"), or * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */ #include "mozilla/layers/ShadowLayersParent.h" #include "BasicLayers.h" #include "LayerManagerOGL.h" #ifdef MOZ_ENABLE_D3D9_LAYER #include "LayerManagerD3D9.h" #endif //MOZ_ENABLE_D3D9_LAYER #include "RenderFrameParent.h" #include "gfx3DMatrix.h" #include "nsFrameLoader.h" #include "nsViewportFrame.h" #include "nsSubDocumentFrame.h" #include "nsIObserver.h" #include "nsContentUtils.h" typedef nsContentView::ViewConfig ViewConfig; 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, ViewTransform& aViewTransform) { aTransform._41 -= aViewTransform.mTranslation.x / aViewTransform.mXScale; aTransform._42 -= aViewTransform.mTranslation.y / aViewTransform.mYScale; } 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() != LayerManager::LAYERS_BASIC) || (aContainedFrame->GetNearestWidget() == static_cast(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; } static nsIntPoint GetRootFrameOffset(nsIFrame* aContainerFrame, nsDisplayListBuilder* aBuilder) { nscoord auPerDevPixel = aContainerFrame->PresContext()->AppUnitsPerDevPixel(); // Offset to the content rect in case we have borders or padding nsPoint frameOffset = (aBuilder->ToReferenceFrame(aContainerFrame->GetParent()) + aContainerFrame->GetContentRect().TopLeft()); 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. nsIntPoint metricsScrollOffset = aMetrics->mViewportScrollOffset; 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) * aConfig.mXScale, (scrollOffset.y / aTempScaleY - metricsScrollOffset.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(); bounds = metrics->mViewport.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()); 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 root frame translation *before* we do the rest of the transforms. nsIntPoint rootFrameOffset = GetRootFrameOffset(aFrame, aBuilder); shadowTransform = shadowTransform * gfx3DMatrix::Translation(float(rootFrameOffset.x), float(rootFrameOffset.y), 0.0); } } if (aLayer->GetIsFixedPosition() && !aLayer->GetParent()->GetIsFixedPosition()) { ReverseTranslate(shadowTransform, layerTransform); const nsIntRect* clipRect = shadow->GetShadowClipRect(); if (clipRect) { nsIntRect transformedClipRect(*clipRect); transformedClipRect.MoveBy(shadowTransform._41, shadowTransform._42); shadow->SetShadowClipRect(&transformedClipRect); } } 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. static bool IsTempLayerManager(LayerManager* aManager) { return (LayerManager::LAYERS_BASIC == aManager->GetBackendType() && !static_cast(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(); 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.mViewportScrollOffset.x, auPerDevPixel) * aXScale, NSIntPixelsToAppUnits(metrics.mViewportScrollOffset.y, auPerDevPixel) * 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( nsPresContext::CSSPixelsToAppUnits(metrics.mCSSContentSize.width) * aXScale, nsPresContext::CSSPixelsToAppUnits(metrics.mCSSContentSize.height) * 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 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, nsnull); } RenderFrameParent::RenderFrameParent(nsFrameLoader* aFrameLoader) : mFrameLoader(aFrameLoader) , mFrameLoaderDestroyed(false) , mBackgroundColor(gfxRGBA(1, 1, 1)) { if (aFrameLoader) { mContentViews[FrameMetrics::ROOT_SCROLL_ID] = new nsContentView(aFrameLoader, FrameMetrics::ROOT_SCROLL_ID); } } 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(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(bool isFirstPaint) { mFrameLoader->SetCurrentRemoteFrame(this); // 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(); 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; } // FIXME/cjones: we should collect the rects/regions updated for // Painted*Layer() calls and pass that region to here, then only // invalidate that rect // // We pass INVALIDATE_NO_THEBES_LAYERS here because we're // invalidating the on behalf of its counterpart in the // content process. Not only do we not need to invalidate the // shadow layers, things would just break if we did --- we have no // way to repaint shadow layers from this process. nsRect rect = nsRect(nsPoint(0, 0), docFrame->GetRect().Size()); docFrame->InvalidateWithFlags(rect, nsIFrame::INVALIDATE_NO_THEBES_LAYERS); } already_AddRefed RenderFrameParent::BuildLayer(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, LayerManager* aManager, const nsIntRect& aVisibleRect) { 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 (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. return nsnull; } if (mContainer) { ClearContainer(mContainer); } ContainerLayer* shadowRoot = GetRootLayer(); if (!shadowRoot) { mContainer = nsnull; return nsnull; } 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, nsnull); AssertInTopLevelChromeDoc(mContainer, aFrame); ViewTransform transform; TransformShadowTree(aBuilder, mFrameLoader, aFrame, shadowRoot, transform); mContainer->SetClipRect(nsnull); if (mFrameLoader->AsyncScrollEnabled()) { const nsContentView* view = GetContentView(FrameMetrics::ROOT_SCROLL_ID); BuildBackgroundPatternFor(mContainer, shadowRoot, view->GetViewConfig(), mBackgroundColor, aManager, aFrame); } mContainer->SetVisibleRegion(aVisibleRect); return nsRefPtr(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::ActorDestroy(ActorDestroyReason why) { 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(nsnull); } mFrameLoader = nsnull; } PLayersParent* RenderFrameParent::AllocPLayers(LayerManager::LayersBackend* aBackendType) { if (!mFrameLoader || mFrameLoaderDestroyed) { *aBackendType = LayerManager::LAYERS_NONE; return nsnull; } nsRefPtr lm = nsContentUtils::LayerManagerForDocument(mFrameLoader->OwnerDoc()); ShadowLayerManager* slm = lm->AsShadowManager(); if (!slm) { *aBackendType = LayerManager::LAYERS_NONE; return nsnull; } *aBackendType = lm->GetBackendType(); return new ShadowLayersParent(slm, this); } 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; } ShadowLayersParent* RenderFrameParent::GetShadowLayers() const { const nsTArray& shadowParents = ManagedPLayersParent(); NS_ABORT_IF_FALSE(shadowParents.Length() <= 1, "can only support at most 1 ShadowLayersParent"); return (shadowParents.Length() == 1) ? static_cast(shadowParents[0]) : nsnull; } ContainerLayer* RenderFrameParent::GetRootLayer() const { ShadowLayersParent* shadowLayers = GetShadowLayers(); return shadowLayers ? shadowLayers->GetRoot() : nsnull; } NS_IMETHODIMP RenderFrameParent::BuildDisplayList(nsDisplayListBuilder* aBuilder, nsSubDocumentFrame* aFrame, const nsRect& aDirtyRect, const nsDisplayListSet& aLists) { // We're the subdoc for and it has // painted content. Display its shadow layer tree. nsDisplayList shadowTree; ContainerLayer* container = GetRootLayer(); if (aBuilder->IsForEventDelivery() && container) { nsRect bounds = aFrame->EnsureInnerView()->GetBounds(); ViewTransform offset = ViewTransform(GetRootFrameOffset(aFrame, aBuilder), 1, 1); BuildListForLayer(container, mFrameLoader, offset, aBuilder, shadowTree, aFrame); } else { shadowTree.AppendToTop( new (aBuilder) nsDisplayRemote(aBuilder, aFrame, this)); } // Clip the shadow layers to subdoc bounds nsPoint offset = aFrame->GetOffsetToCrossDoc(aBuilder->ReferenceFrame()); nsRect bounds = aFrame->EnsureInnerView()->GetBounds() + offset; return aLists.Content()->AppendNewToTop( new (aBuilder) nsDisplayClip(aBuilder, aFrame, &shadowTree, bounds)); } } // namespace layout } // namespace mozilla already_AddRefed nsDisplayRemote::BuildLayer(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerParameters& aContainerParameters) { PRInt32 appUnitsPerDevPixel = mFrame->PresContext()->AppUnitsPerDevPixel(); nsIntRect visibleRect = GetVisibleRect().ToNearestPixels(appUnitsPerDevPixel); nsRefPtr layer = mRemoteFrame->BuildLayer(aBuilder, mFrame, aManager, visibleRect); return layer.forget(); } void nsDisplayRemoteShadow::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect, HitTestState* aState, nsTArray *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); } }