The Tor Browser: layout/ipc/RenderFrameParent.cpp@44a2da4a2ab2

Replace accessor implementation with direct member state manipulation, by
request https://trac.torproject.org/projects/tor/ticket/9701#comment:32

     1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-

     2  * vim: sw=2 ts=8 et :

     3  */

     4 /* This Source Code Form is subject to the terms of the Mozilla Public

     5  * License, v. 2.0. If a copy of the MPL was not distributed with this

     6  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     8 #include "base/basictypes.h"

    10 #include "BasicLayers.h"

    11 #include "gfx3DMatrix.h"

    12 #ifdef MOZ_ENABLE_D3D9_LAYER

    13 # include "LayerManagerD3D9.h"

    14 #endif //MOZ_ENABLE_D3D9_LAYER

    15 #include "mozilla/BrowserElementParent.h"

    16 #include "mozilla/dom/TabParent.h"

    17 #include "mozilla/layers/APZCTreeManager.h"

    18 #include "mozilla/layers/CompositorParent.h"

    19 #include "mozilla/layers/LayerTransactionParent.h"

    20 #include "nsContentUtils.h"

    21 #include "nsFrameLoader.h"

    22 #include "nsIObserver.h"

    23 #include "nsSubDocumentFrame.h"

    24 #include "nsView.h"

    25 #include "nsViewportFrame.h"

    26 #include "RenderFrameParent.h"

    27 #include "mozilla/layers/LayerManagerComposite.h"

    28 #include "mozilla/layers/CompositorChild.h"

    29 #include "ClientLayerManager.h"

    31 typedef nsContentView::ViewConfig ViewConfig;

    32 using namespace mozilla::dom;

    33 using namespace mozilla::layers;

    35 namespace mozilla {

    36 namespace layout {

    38 typedef FrameMetrics::ViewID ViewID;

    39 typedef RenderFrameParent::ViewMap ViewMap;

    41 // Represents (affine) transforms that are calculated from a content view.

    42 struct ViewTransform {

    43   ViewTransform(nsIntPoint aTranslation = nsIntPoint(0, 0), float aXScale = 1, float aYScale = 1)

    44     : mTranslation(aTranslation)

    45     , mXScale(aXScale)

    46     , mYScale(aYScale)

    47   {}

    49   operator gfx3DMatrix() const

    50   {

    51     return

    52       gfx3DMatrix::Translation(mTranslation.x, mTranslation.y, 0) *

    53       gfx3DMatrix::ScalingMatrix(mXScale, mYScale, 1);

    54   }

    56   nsIntPoint mTranslation;

    57   float mXScale;

    58   float mYScale;

    59 };

    61 // Matrix helpers

    62 // For our simple purposes, these helpers apply to 2D affine transformations

    63 // that can be represented by a scale and a translation. This makes the math

    64 // much easier because we only expect the diagonals and the translation

    65 // coordinates of the matrix to be non-zero.

    67 static double GetXScale(const gfx3DMatrix& aTransform)

    68 {

    69   return aTransform._11;

    70 }

    72 static double GetYScale(const gfx3DMatrix& aTransform)

    73 {

    74   return aTransform._22;

    75 }

    77 static void Scale(gfx3DMatrix& aTransform, double aXScale, double aYScale)

    78 {

    79   aTransform._11 *= aXScale;

    80   aTransform._22 *= aYScale;

    81 }

    83 static void ReverseTranslate(gfx3DMatrix& aTransform, const gfxPoint& aOffset)

    84 {

    85   aTransform._41 -= aOffset.x;

    86   aTransform._42 -= aOffset.y;

    87 }

    90 static void ApplyTransform(nsRect& aRect,

    91                            gfx3DMatrix& aTransform,

    92                            nscoord auPerDevPixel)

    93 {

    94   aRect.x = aRect.x * aTransform._11 + aTransform._41 * auPerDevPixel;

    95   aRect.y = aRect.y * aTransform._22 + aTransform._42 * auPerDevPixel;

    96   aRect.width = aRect.width * aTransform._11;

    97   aRect.height = aRect.height * aTransform._22;

    98 }

   100 static void

   101 AssertInTopLevelChromeDoc(ContainerLayer* aContainer,

   102                           nsIFrame* aContainedFrame)

   103 {

   104   NS_ASSERTION(

   105     (aContainer->Manager()->GetBackendType() != mozilla::layers::LayersBackend::LAYERS_BASIC) ||

   106     (aContainedFrame->GetNearestWidget() ==

   107      static_cast<BasicLayerManager*>(aContainer->Manager())->GetRetainerWidget()),

   108     "Expected frame to be in top-level chrome document");

   109 }

   111 // Return view for given ID in aMap, nullptr if not found.

   112 static nsContentView*

   113 FindViewForId(const ViewMap& aMap, ViewID aId)

   114 {

   115   ViewMap::const_iterator iter = aMap.find(aId);

   116   return iter != aMap.end() ? iter->second : nullptr;

   117 }

   119 // Return the root content view in aMap, nullptr if not found.

   120 static nsContentView*

   121 FindRootView(const ViewMap& aMap)

   122 {

   123   for (ViewMap::const_iterator iter = aMap.begin(), end = aMap.end();

   124        iter != end;

   125        ++iter) {

   126     if (iter->second->IsRoot())

   127       return iter->second;

   128   }

   129   return nullptr;

   130 }

   132 static const FrameMetrics*

   133 GetFrameMetrics(Layer* aLayer)

   134 {

   135   ContainerLayer* container = aLayer->AsContainerLayer();

   136   return container ? &container->GetFrameMetrics() : nullptr;

   137 }

   139 /**

   140  * Gets the layer-pixel offset of aContainerFrame's content rect top-left

   141  * from the nearest display item reference frame (which we assume will be inducing

   142  * a ContainerLayer).

   143  */

   144 static nsIntPoint

   145 GetContentRectLayerOffset(nsIFrame* aContainerFrame, nsDisplayListBuilder* aBuilder)

   146 {

   147   nscoord auPerDevPixel = aContainerFrame->PresContext()->AppUnitsPerDevPixel();

   149   // Offset to the content rect in case we have borders or padding

   150   // Note that aContainerFrame could be a reference frame itself, so

   151   // we need to be careful here to ensure that we call ToReferenceFrame

   152   // on aContainerFrame and not its parent.

   153   nsPoint frameOffset = aBuilder->ToReferenceFrame(aContainerFrame) +

   154     (aContainerFrame->GetContentRect().TopLeft() - aContainerFrame->GetPosition());

   156   return frameOffset.ToNearestPixels(auPerDevPixel);

   157 }

   159 // Compute the transform of the shadow tree contained by

   160 // |aContainerFrame| to widget space.  We transform because the

   161 // subprocess layer manager renders to a different top-left than where

   162 // the shadow tree is drawn here and because a scale can be set on the

   163 // shadow tree.

   164 static ViewTransform

   165 ComputeShadowTreeTransform(nsIFrame* aContainerFrame,

   166                            nsFrameLoader* aRootFrameLoader,

   167                            const FrameMetrics* aMetrics,

   168                            const ViewConfig& aConfig,

   169                            float aTempScaleX = 1.0,

   170                            float aTempScaleY = 1.0)

   171 {

   172   // |aMetrics->mViewportScrollOffset| The frame's scroll offset when it was

   173   //                                   painted, in content document pixels.

   174   // |aConfig.mScrollOffset|           What our user expects, or wants, the

   175   //                                   frame scroll offset to be in chrome

   176   //                                   document app units.

   177   //

   178   // So we set a compensating translation that moves the content document

   179   // pixels to where the user wants them to be.

   180   //

   181   nscoord auPerDevPixel = aContainerFrame->PresContext()->AppUnitsPerDevPixel();

   182   nsIntPoint scrollOffset =

   183     aConfig.mScrollOffset.ToNearestPixels(auPerDevPixel);

   184   LayerIntPoint metricsScrollOffset = RoundedToInt(aMetrics->GetScrollOffsetInLayerPixels());

   186   if (aRootFrameLoader->AsyncScrollEnabled() && !aMetrics->mDisplayPort.IsEmpty()) {

   187     // Only use asynchronous scrolling if it is enabled and there is a

   188     // displayport defined. It is useful to have a scroll layer that is

   189     // synchronously scrolled for identifying a scroll area before it is

   190     // being actively scrolled.

   191     nsIntPoint scrollCompensation(

   192       (scrollOffset.x / aTempScaleX - metricsScrollOffset.x),

   193       (scrollOffset.y / aTempScaleY - metricsScrollOffset.y));

   195     return ViewTransform(-scrollCompensation, aConfig.mXScale, aConfig.mYScale);

   196   } else {

   197     return ViewTransform(nsIntPoint(0, 0), 1, 1);

   198   }

   199 }

   201 // Use shadow layer tree to build display list for the browser's frame.

   202 static void

   203 BuildListForLayer(Layer* aLayer,

   204                   nsFrameLoader* aRootFrameLoader,

   205                   const gfx3DMatrix& aTransform,

   206                   nsDisplayListBuilder* aBuilder,

   207                   nsDisplayList& aShadowTree,

   208                   nsIFrame* aSubdocFrame)

   209 {

   210   const FrameMetrics* metrics = GetFrameMetrics(aLayer);

   212   gfx3DMatrix transform;

   214   if (metrics && metrics->IsScrollable()) {

   215     const ViewID scrollId = metrics->GetScrollId();

   217     // We need to figure out the bounds of the scrollable region using the

   218     // shadow layer tree from the remote process. The metrics viewport is

   219     // defined based on all the transformations of its parent layers and

   220     // the scale of the current layer.

   222     // Calculate transform for this layer.

   223     nsContentView* view =

   224       aRootFrameLoader->GetCurrentRemoteFrame()->GetContentView(scrollId);

   225     // XXX why don't we include aLayer->GetTransform() in the inverse-scale here?

   226     // This seems wrong, but it doesn't seem to cause bugs!

   227     gfx3DMatrix applyTransform = ComputeShadowTreeTransform(

   228       aSubdocFrame, aRootFrameLoader, metrics, view->GetViewConfig(),

   229       1 / GetXScale(aTransform), 1 / GetYScale(aTransform));

   230     gfx3DMatrix layerTransform;

   231     To3DMatrix(aLayer->GetTransform(), layerTransform);

   232     transform = applyTransform * layerTransform * aTransform;

   234     // As mentioned above, bounds calculation also depends on the scale

   235     // of this layer.

   236     gfx3DMatrix tmpTransform = aTransform;

   237     Scale(tmpTransform, GetXScale(applyTransform), GetYScale(applyTransform));

   239     // Calculate rect for this layer based on aTransform.

   240     nsRect bounds;

   241     {

   242       bounds = CSSRect::ToAppUnits(metrics->mViewport);

   243       nscoord auPerDevPixel = aSubdocFrame->PresContext()->AppUnitsPerDevPixel();

   244       ApplyTransform(bounds, tmpTransform, auPerDevPixel);

   245     }

   247     aShadowTree.AppendToTop(

   248       new (aBuilder) nsDisplayRemoteShadow(aBuilder, aSubdocFrame, bounds, scrollId));

   250   } else {

   251     gfx3DMatrix layerTransform;

   252     To3DMatrix(aLayer->GetTransform(), layerTransform);

   253     transform = layerTransform * aTransform;

   254   }

   256   for (Layer* child = aLayer->GetFirstChild(); child;

   257        child = child->GetNextSibling()) {

   258     BuildListForLayer(child, aRootFrameLoader, transform,

   259                       aBuilder, aShadowTree, aSubdocFrame);

   260   }

   261 }

   263 // Go down shadow layer tree and apply transformations for scrollable layers.

   264 static void

   265 TransformShadowTree(nsDisplayListBuilder* aBuilder, nsFrameLoader* aFrameLoader,

   266                     nsIFrame* aFrame, Layer* aLayer,

   267                     const ViewTransform& aTransform,

   268                     float aTempScaleDiffX = 1.0,

   269                     float aTempScaleDiffY = 1.0)

   270 {

   271   LayerComposite* shadow = aLayer->AsLayerComposite();

   272   shadow->SetShadowClipRect(aLayer->GetClipRect());

   273   shadow->SetShadowVisibleRegion(aLayer->GetVisibleRegion());

   274   shadow->SetShadowOpacity(aLayer->GetOpacity());

   276   const FrameMetrics* metrics = GetFrameMetrics(aLayer);

   278   gfx3DMatrix shadowTransform;

   279   To3DMatrix(aLayer->GetTransform(), shadowTransform);

   280   ViewTransform layerTransform = aTransform;

   282   if (metrics && metrics->IsScrollable()) {

   283     const ViewID scrollId = metrics->GetScrollId();

   284     const nsContentView* view =

   285       aFrameLoader->GetCurrentRemoteFrame()->GetContentView(scrollId);

   286     NS_ABORT_IF_FALSE(view, "Array of views should be consistent with layer tree");

   287     gfx3DMatrix currentTransform;

   288     To3DMatrix(aLayer->GetTransform(), currentTransform);

   290     const ViewConfig& config = view->GetViewConfig();

   291     // With temporary scale we should compensate translation

   292     // using temporary scale value

   293     aTempScaleDiffX *= GetXScale(shadowTransform) * config.mXScale;

   294     aTempScaleDiffY *= GetYScale(shadowTransform) * config.mYScale;

   295     ViewTransform viewTransform = ComputeShadowTreeTransform(

   296       aFrame, aFrameLoader, metrics, view->GetViewConfig(),

   297       aTempScaleDiffX, aTempScaleDiffY

   298     );

   300     // Apply the layer's own transform *before* the view transform

   301     shadowTransform = gfx3DMatrix(viewTransform) * currentTransform;

   303     layerTransform = viewTransform;

   304     if (metrics->IsRootScrollable()) {

   305       // Apply the translation *before* we do the rest of the transforms.

   306       nsIntPoint offset = GetContentRectLayerOffset(aFrame, aBuilder);

   307       shadowTransform = shadowTransform *

   308           gfx3DMatrix::Translation(float(offset.x), float(offset.y), 0.0);

   309     }

   310   }

   312   if (aLayer->GetIsFixedPosition() &&

   313       !aLayer->GetParent()->GetIsFixedPosition()) {

   314     // Alter the shadow transform of fixed position layers in the situation

   315     // that the view transform's scroll position doesn't match the actual

   316     // scroll position, due to asynchronous layer scrolling.

   317     float offsetX = layerTransform.mTranslation.x;

   318     float offsetY = layerTransform.mTranslation.y;

   319     ReverseTranslate(shadowTransform, gfxPoint(offsetX, offsetY));

   320     const nsIntRect* clipRect = shadow->GetShadowClipRect();

   321     if (clipRect) {

   322       nsIntRect transformedClipRect(*clipRect);

   323       transformedClipRect.MoveBy(-offsetX, -offsetY);

   324       shadow->SetShadowClipRect(&transformedClipRect);

   325     }

   326   }

   328   // The transform already takes the resolution scale into account.  Since we

   329   // will apply the resolution scale again when computing the effective

   330   // transform, we must apply the inverse resolution scale here.

   331   if (ContainerLayer* c = aLayer->AsContainerLayer()) {

   332     shadowTransform.Scale(1.0f/c->GetPreXScale(),

   333                           1.0f/c->GetPreYScale(),

   334                           1);

   335   }

   336   shadowTransform.ScalePost(1.0f/aLayer->GetPostXScale(),

   337                             1.0f/aLayer->GetPostYScale(),

   338                             1);

   340   gfx::Matrix4x4 realShadowTransform;

   341   ToMatrix4x4(shadowTransform, realShadowTransform);

   342   shadow->SetShadowTransform(realShadowTransform);

   343   for (Layer* child = aLayer->GetFirstChild();

   344        child; child = child->GetNextSibling()) {

   345     TransformShadowTree(aBuilder, aFrameLoader, aFrame, child, layerTransform,

   346                         aTempScaleDiffX, aTempScaleDiffY);

   347   }

   348 }

   350 static void

   351 ClearContainer(ContainerLayer* aContainer)

   352 {

   353   while (Layer* layer = aContainer->GetFirstChild()) {

   354     aContainer->RemoveChild(layer);

   355   }

   356 }

   358 // Return true iff |aManager| is a "temporary layer manager".  They're

   359 // used for small software rendering tasks, like drawWindow.  That's

   360 // currently implemented by a BasicLayerManager without a backing

   361 // widget, and hence in non-retained mode.

   362 inline static bool

   363 IsTempLayerManager(LayerManager* aManager)

   364 {

   365   return (mozilla::layers::LayersBackend::LAYERS_BASIC == aManager->GetBackendType() &&

   366           !static_cast<BasicLayerManager*>(aManager)->IsRetained());

   367 }

   369 // Recursively create a new array of scrollables, preserving any scrollables

   370 // that are still in the layer tree.

   371 //

   372 // aXScale and aYScale are used to calculate any values that need to be in

   373 // chrome-document CSS pixels and aren't part of the rendering loop, such as

   374 // the initial scroll offset for a new view.

   375 static void

   376 BuildViewMap(ViewMap& oldContentViews, ViewMap& newContentViews,

   377              nsFrameLoader* aFrameLoader, Layer* aLayer,

   378              float aXScale = 1, float aYScale = 1,

   379              float aAccConfigXScale = 1, float aAccConfigYScale = 1)

   380 {

   381   ContainerLayer* container = aLayer->AsContainerLayer();

   382   if (!container)

   383     return;

   384   const FrameMetrics metrics = container->GetFrameMetrics();

   385   const ViewID scrollId = metrics.GetScrollId();

   386   gfx3DMatrix transform;

   387   To3DMatrix(aLayer->GetTransform(), transform);

   388   aXScale *= GetXScale(transform);

   389   aYScale *= GetYScale(transform);

   391   if (metrics.IsScrollable()) {

   392     nscoord auPerDevPixel = aFrameLoader->GetPrimaryFrameOfOwningContent()

   393                                         ->PresContext()->AppUnitsPerDevPixel();

   394     nscoord auPerCSSPixel = auPerDevPixel * metrics.mDevPixelsPerCSSPixel.scale;

   395     nsContentView* view = FindViewForId(oldContentViews, scrollId);

   396     if (view) {

   397       // View already exists. Be sure to propagate scales for any values

   398       // that need to be calculated something in chrome-doc CSS pixels.

   399       ViewConfig config = view->GetViewConfig();

   400       aXScale *= config.mXScale;

   401       aYScale *= config.mYScale;

   402       view->mFrameLoader = aFrameLoader;

   403       // If scale has changed, then we should update

   404       // current scroll offset to new scaled value

   405       if (aAccConfigXScale != view->mParentScaleX ||

   406           aAccConfigYScale != view->mParentScaleY) {

   407         float xscroll = 0, yscroll = 0;

   408         view->GetScrollX(&xscroll);

   409         view->GetScrollY(&yscroll);

   410         xscroll = xscroll * (aAccConfigXScale / view->mParentScaleX);

   411         yscroll = yscroll * (aAccConfigYScale / view->mParentScaleY);

   412         view->ScrollTo(xscroll, yscroll);

   413         view->mParentScaleX = aAccConfigXScale;

   414         view->mParentScaleY = aAccConfigYScale;

   415       }

   416       // Collect only config scale values for scroll compensation

   417       aAccConfigXScale *= config.mXScale;

   418       aAccConfigYScale *= config.mYScale;

   419     } else {

   420       // View doesn't exist, so generate one. We start the view scroll offset at

   421       // the same position as the framemetric's scroll offset from the layer.

   422       // The default scale is 1, so no need to propagate scale down.

   423       ViewConfig config;

   424       config.mScrollOffset = nsPoint(

   425         NSIntPixelsToAppUnits(metrics.GetScrollOffset().x, auPerCSSPixel) * aXScale,

   426         NSIntPixelsToAppUnits(metrics.GetScrollOffset().y, auPerCSSPixel) * aYScale);

   427       view = new nsContentView(aFrameLoader, scrollId, metrics.mIsRoot, config);

   428       view->mParentScaleX = aAccConfigXScale;

   429       view->mParentScaleY = aAccConfigYScale;

   430     }

   432     // I don't know what units mViewportSize is in, hence use ToUnknownRect

   433     // here to mark the current frontier in type info propagation

   434     gfx::Rect viewport = metrics.mViewport.ToUnknownRect();

   435     view->mViewportSize = nsSize(

   436       NSIntPixelsToAppUnits(viewport.width, auPerDevPixel) * aXScale,

   437       NSIntPixelsToAppUnits(viewport.height, auPerDevPixel) * aYScale);

   438     view->mContentSize = nsSize(

   439       NSFloatPixelsToAppUnits(metrics.mScrollableRect.width, auPerCSSPixel) * aXScale,

   440       NSFloatPixelsToAppUnits(metrics.mScrollableRect.height, auPerCSSPixel) * aYScale);

   442     newContentViews[scrollId] = view;

   443   }

   445   for (Layer* child = aLayer->GetFirstChild();

   446        child; child = child->GetNextSibling()) {

   447     BuildViewMap(oldContentViews, newContentViews, aFrameLoader, child,

   448                  aXScale, aYScale, aAccConfigXScale, aAccConfigYScale);

   449   }

   450 }

   452 static void

   453 BuildBackgroundPatternFor(ContainerLayer* aContainer,

   454                           Layer* aShadowRoot,

   455                           const ViewConfig& aConfig,

   456                           const gfxRGBA& aColor,

   457                           LayerManager* aManager,

   458                           nsIFrame* aFrame)

   459 {

   460   LayerComposite* shadowRoot = aShadowRoot->AsLayerComposite();

   461   gfx::Matrix t;

   462   if (!shadowRoot->GetShadowTransform().Is2D(&t)) {

   463     return;

   464   }

   466   // Get the rect bounding the shadow content, transformed into the

   467   // same space as |aFrame|

   468   nsIntRect contentBounds = shadowRoot->GetShadowVisibleRegion().GetBounds();

   469   gfxRect contentVis(contentBounds.x, contentBounds.y,

   470                      contentBounds.width, contentBounds.height);

   471   gfxRect localContentVis(gfx::ThebesMatrix(t).Transform(contentVis));

   472   // Round *in* here because this area is punched out of the background

   473   localContentVis.RoundIn();

   474   nsIntRect localIntContentVis(localContentVis.X(), localContentVis.Y(),

   475                                localContentVis.Width(), localContentVis.Height());

   477   // Get the frame's rect

   478   nscoord auPerDevPixel = aFrame->PresContext()->AppUnitsPerDevPixel();

   479   nsIntRect frameRect = aFrame->GetRect().ToOutsidePixels(auPerDevPixel);

   481   // If the shadow tree covers the frame rect, don't bother building

   482   // the background, it wouldn't be visible

   483   if (localIntContentVis.Contains(frameRect)) {

   484     return;

   485   }

   486   nsRefPtr<ColorLayer> layer = aManager->CreateColorLayer();

   487   layer->SetColor(aColor);

   489   // The visible area of the background is the frame's area minus the

   490   // content area

   491   nsIntRegion bgRgn(frameRect);

   492   bgRgn.Sub(bgRgn, localIntContentVis);

   493   bgRgn.MoveBy(-frameRect.TopLeft());

   494   layer->SetVisibleRegion(bgRgn);

   496   aContainer->InsertAfter(layer, nullptr);

   497 }

   499 already_AddRefed<LayerManager>

   500 GetFrom(nsFrameLoader* aFrameLoader)

   501 {

   502   nsIDocument* doc = aFrameLoader->GetOwnerDoc();

   503   return nsContentUtils::LayerManagerForDocument(doc);

   504 }

   506 class RemoteContentController : public GeckoContentController {

   507 public:

   508   RemoteContentController(RenderFrameParent* aRenderFrame)

   509     : mUILoop(MessageLoop::current())

   510     , mRenderFrame(aRenderFrame)

   511     , mHaveZoomConstraints(false)

   512   { }

   514   virtual void RequestContentRepaint(const FrameMetrics& aFrameMetrics) MOZ_OVERRIDE

   515   {

   516     // We always need to post requests into the "UI thread" otherwise the

   517     // requests may get processed out of order.

   518     mUILoop->PostTask(

   519       FROM_HERE,

   520       NewRunnableMethod(this, &RemoteContentController::DoRequestContentRepaint,

   521                         aFrameMetrics));

   522   }

   524   virtual void AcknowledgeScrollUpdate(const FrameMetrics::ViewID& aScrollId,

   525                                        const uint32_t& aScrollGeneration) MOZ_OVERRIDE

   526   {

   527     if (MessageLoop::current() != mUILoop) {

   528       // We have to send this message from the "UI thread" (main

   529       // thread).

   530       mUILoop->PostTask(

   531         FROM_HERE,

   532         NewRunnableMethod(this, &RemoteContentController::AcknowledgeScrollUpdate,

   533                           aScrollId, aScrollGeneration));

   534       return;

   535     }

   536     if (mRenderFrame) {

   537       TabParent* browser = static_cast<TabParent*>(mRenderFrame->Manager());

   538       browser->AcknowledgeScrollUpdate(aScrollId, aScrollGeneration);

   539     }

   540   }

   542   virtual void HandleDoubleTap(const CSSPoint& aPoint,

   543                                int32_t aModifiers,

   544                                const ScrollableLayerGuid& aGuid) MOZ_OVERRIDE

   545   {

   546     if (MessageLoop::current() != mUILoop) {

   547       // We have to send this message from the "UI thread" (main

   548       // thread).

   549       mUILoop->PostTask(

   550         FROM_HERE,

   551         NewRunnableMethod(this, &RemoteContentController::HandleDoubleTap,

   552                           aPoint, aModifiers, aGuid));

   553       return;

   554     }

   555     if (mRenderFrame) {

   556       TabParent* browser = static_cast<TabParent*>(mRenderFrame->Manager());

   557       browser->HandleDoubleTap(aPoint, aModifiers, aGuid);

   558     }

   559   }

   561   virtual void HandleSingleTap(const CSSPoint& aPoint,

   562                                int32_t aModifiers,

   563                                const ScrollableLayerGuid& aGuid) MOZ_OVERRIDE

   564   {

   565     if (MessageLoop::current() != mUILoop) {

   566       // We have to send this message from the "UI thread" (main

   567       // thread).

   568       mUILoop->PostTask(

   569         FROM_HERE,

   570         NewRunnableMethod(this, &RemoteContentController::HandleSingleTap,

   571                           aPoint, aModifiers, aGuid));

   572       return;

   573     }

   574     if (mRenderFrame) {

   575       TabParent* browser = static_cast<TabParent*>(mRenderFrame->Manager());

   576       browser->HandleSingleTap(aPoint, aModifiers, aGuid);

   577     }

   578   }

   580   virtual void HandleLongTap(const CSSPoint& aPoint,

   581                              int32_t aModifiers,

   582                              const ScrollableLayerGuid& aGuid) MOZ_OVERRIDE

   583   {

   584     if (MessageLoop::current() != mUILoop) {

   585       // We have to send this message from the "UI thread" (main

   586       // thread).

   587       mUILoop->PostTask(

   588         FROM_HERE,

   589         NewRunnableMethod(this, &RemoteContentController::HandleLongTap,

   590                           aPoint, aModifiers, aGuid));

   591       return;

   592     }

   593     if (mRenderFrame) {

   594       TabParent* browser = static_cast<TabParent*>(mRenderFrame->Manager());

   595       browser->HandleLongTap(aPoint, aModifiers, aGuid);

   596     }

   597   }

   599   virtual void HandleLongTapUp(const CSSPoint& aPoint,

   600                                int32_t aModifiers,

   601                                const ScrollableLayerGuid& aGuid) MOZ_OVERRIDE

   602   {

   603     if (MessageLoop::current() != mUILoop) {

   604       // We have to send this message from the "UI thread" (main

   605       // thread).

   606       mUILoop->PostTask(

   607         FROM_HERE,

   608         NewRunnableMethod(this, &RemoteContentController::HandleLongTapUp,

   609                           aPoint, aModifiers, aGuid));

   610       return;

   611     }

   612     if (mRenderFrame) {

   613       TabParent* browser = static_cast<TabParent*>(mRenderFrame->Manager());

   614       browser->HandleLongTapUp(aPoint, aModifiers, aGuid);

   615     }

   616   }

   618   void ClearRenderFrame() { mRenderFrame = nullptr; }

   620   virtual void SendAsyncScrollDOMEvent(bool aIsRoot,

   621                                        const CSSRect& aContentRect,

   622                                        const CSSSize& aContentSize) MOZ_OVERRIDE

   623   {

   624     if (MessageLoop::current() != mUILoop) {

   625       mUILoop->PostTask(

   626         FROM_HERE,

   627         NewRunnableMethod(this,

   628                           &RemoteContentController::SendAsyncScrollDOMEvent,

   629                           aIsRoot, aContentRect, aContentSize));

   630       return;

   631     }

   632     if (mRenderFrame && aIsRoot) {

   633       TabParent* browser = static_cast<TabParent*>(mRenderFrame->Manager());

   634       BrowserElementParent::DispatchAsyncScrollEvent(browser, aContentRect,

   635                                                      aContentSize);

   636     }

   637   }

   639   virtual void PostDelayedTask(Task* aTask, int aDelayMs) MOZ_OVERRIDE

   640   {

   641     MessageLoop::current()->PostDelayedTask(FROM_HERE, aTask, aDelayMs);

   642   }

   644   virtual bool GetRootZoomConstraints(ZoomConstraints* aOutConstraints)

   645   {

   646     if (mHaveZoomConstraints && aOutConstraints) {

   647       *aOutConstraints = mZoomConstraints;

   648     }

   649     return mHaveZoomConstraints;

   650   }

   652   virtual bool GetTouchSensitiveRegion(CSSRect* aOutRegion)

   653   {

   654     if (mTouchSensitiveRegion.IsEmpty())

   655       return false;

   657     *aOutRegion = CSSRect::FromAppUnits(mTouchSensitiveRegion.GetBounds());

   658     return true;

   659   }

   661   virtual void NotifyAPZStateChange(const ScrollableLayerGuid& aGuid,

   662                                     APZStateChange aChange,

   663                                     int aArg)

   664   {

   665     if (MessageLoop::current() != mUILoop) {

   666       mUILoop->PostTask(

   667         FROM_HERE,

   668         NewRunnableMethod(this, &RemoteContentController::NotifyAPZStateChange,

   669                           aGuid, aChange, aArg));

   670       return;

   671     }

   672     if (mRenderFrame) {

   673       TabParent* browser = static_cast<TabParent*>(mRenderFrame->Manager());

   674       browser->NotifyAPZStateChange(aGuid.mScrollId, aChange, aArg);

   675     }

   676   }

   678   // Methods used by RenderFrameParent to set fields stored here.

   680   void SaveZoomConstraints(const ZoomConstraints& aConstraints)

   681   {

   682     mHaveZoomConstraints = true;

   683     mZoomConstraints = aConstraints;

   684   }

   686   void SetTouchSensitiveRegion(const nsRegion& aRegion)

   687   {

   688     mTouchSensitiveRegion = aRegion;

   689   }

   690 private:

   691   void DoRequestContentRepaint(const FrameMetrics& aFrameMetrics)

   692   {

   693     if (mRenderFrame) {

   694       TabParent* browser = static_cast<TabParent*>(mRenderFrame->Manager());

   695       browser->UpdateFrame(aFrameMetrics);

   696     }

   697   }

   699   MessageLoop* mUILoop;

   700   RenderFrameParent* mRenderFrame;

   702   bool mHaveZoomConstraints;

   703   ZoomConstraints mZoomConstraints;

   704   nsRegion mTouchSensitiveRegion;

   705 };

   707 RenderFrameParent::RenderFrameParent()

   708   : mLayersId(0)

   709   , mFrameLoaderDestroyed(false)

   710   , mBackgroundColor(gfxRGBA(1, 1, 1))

   711 {

   712 }

   714 void

   715 RenderFrameParent::Init(nsFrameLoader* aFrameLoader,

   716                         ScrollingBehavior aScrollingBehavior,

   717                         TextureFactoryIdentifier* aTextureFactoryIdentifier,

   718                         uint64_t* aId)

   719 {

   720   mFrameLoader = aFrameLoader;

   722   *aId = 0;

   724   nsRefPtr<LayerManager> lm = GetFrom(mFrameLoader);

   725   // Perhaps the document containing this frame currently has no presentation?

   726   if (lm && lm->GetBackendType() == LayersBackend::LAYERS_CLIENT) {

   727     *aTextureFactoryIdentifier =

   728       static_cast<ClientLayerManager*>(lm.get())->GetTextureFactoryIdentifier();

   729   } else {

   730     *aTextureFactoryIdentifier = TextureFactoryIdentifier();

   731   }

   733   if (lm && lm->GetRoot() && lm->GetRoot()->AsContainerLayer()) {

   734     ViewID rootScrollId = lm->GetRoot()->AsContainerLayer()->GetFrameMetrics().GetScrollId();

   735     if (rootScrollId != FrameMetrics::NULL_SCROLL_ID) {

   736       mContentViews[rootScrollId] = new nsContentView(aFrameLoader, rootScrollId, true);

   737     }

   738   }

   740   if (CompositorParent::CompositorLoop()) {

   741     // Our remote frame will push layers updates to the compositor,

   742     // and we'll keep an indirect reference to that tree.

   743     *aId = mLayersId = CompositorParent::AllocateLayerTreeId();

   744     if (lm && lm->GetBackendType() == LayersBackend::LAYERS_CLIENT) {

   745       ClientLayerManager *clientManager = static_cast<ClientLayerManager*>(lm.get());

   746       clientManager->GetRemoteRenderer()->SendNotifyChildCreated(mLayersId);

   747     }

   748     if (aScrollingBehavior == ASYNC_PAN_ZOOM) {

   749       mContentController = new RemoteContentController(this);

   750       CompositorParent::SetControllerForLayerTree(mLayersId, mContentController);

   751     }

   752   }

   753   // Set a default RenderFrameParent

   754   mFrameLoader->SetCurrentRemoteFrame(this);

   755 }

   757 APZCTreeManager*

   758 RenderFrameParent::GetApzcTreeManager()

   759 {

   760   // We can't get a ref to the APZCTreeManager until after the child is

   761   // created and the static getter knows which CompositorParent is

   762   // instantiated with this layers ID. That's why try to fetch it when

   763   // we first need it and cache the result.

   764   if (!mApzcTreeManager) {

   765     mApzcTreeManager = CompositorParent::GetAPZCTreeManager(mLayersId);

   766   }

   767   return mApzcTreeManager.get();

   768 }

   770 RenderFrameParent::~RenderFrameParent()

   771 {}

   773 void

   774 RenderFrameParent::Destroy()

   775 {

   776   size_t numChildren = ManagedPLayerTransactionParent().Length();

   777   NS_ABORT_IF_FALSE(0 == numChildren || 1 == numChildren,

   778                     "render frame must only have 0 or 1 layer manager");

   780   if (numChildren) {

   781     LayerTransactionParent* layers =

   782       static_cast<LayerTransactionParent*>(ManagedPLayerTransactionParent()[0]);

   783     layers->Destroy();

   784   }

   786   mFrameLoaderDestroyed = true;

   787 }

   789 nsContentView*

   790 RenderFrameParent::GetContentView(ViewID aId)

   791 {

   792   return FindViewForId(mContentViews, aId);

   793 }

   795 nsContentView*

   796 RenderFrameParent::GetRootContentView()

   797 {

   798   return FindRootView(mContentViews);

   799 }

   801 void

   802 RenderFrameParent::ContentViewScaleChanged(nsContentView* aView)

   803 {

   804   // Since the scale has changed for a view, it and its descendents need their

   805   // shadow-space attributes updated. It's easiest to rebuild the view map.

   806   BuildViewMap();

   807 }

   809 void

   810 RenderFrameParent::ShadowLayersUpdated(LayerTransactionParent* aLayerTree,

   811                                        const TargetConfig& aTargetConfig,

   812                                        bool aIsFirstPaint,

   813                                        bool aScheduleComposite)

   814 {

   815   // View map must only contain views that are associated with the current

   816   // shadow layer tree. We must always update the map when shadow layers

   817   // are updated.

   818   BuildViewMap();

   820   TriggerRepaint();

   821 }

   823 already_AddRefed<Layer>

   824 RenderFrameParent::BuildLayer(nsDisplayListBuilder* aBuilder,

   825                               nsIFrame* aFrame,

   826                               LayerManager* aManager,

   827                               const nsIntRect& aVisibleRect,

   828                               nsDisplayItem* aItem,

   829                               const ContainerLayerParameters& aContainerParameters)

   830 {

   831   NS_ABORT_IF_FALSE(aFrame,

   832                     "makes no sense to have a shadow tree without a frame");

   833   NS_ABORT_IF_FALSE(!mContainer ||

   834                     IsTempLayerManager(aManager) ||

   835                     mContainer->Manager() == aManager,

   836                     "retaining manager changed out from under us ... HELP!");

   838   if (IsTempLayerManager(aManager) ||

   839       (mContainer && mContainer->Manager() != aManager)) {

   840     // This can happen if aManager is a "temporary" manager, or if the

   841     // widget's layer manager changed out from under us.  We need to

   842     // FIXME handle the former case somehow, probably with an API to

   843     // draw a manager's subtree.  The latter is bad bad bad, but the

   844     // the NS_ABORT_IF_FALSE() above will flag it.  Returning nullptr

   845     // here will just cause the shadow subtree not to be rendered.

   846     NS_WARNING("Remote iframe not rendered");

   847     return nullptr;

   848   }

   850   uint64_t id = GetLayerTreeId();

   851   if (0 != id) {

   852     MOZ_ASSERT(!GetRootLayer());

   854     nsRefPtr<Layer> layer =

   855       (aManager->GetLayerBuilder()->GetLeafLayerFor(aBuilder, aItem));

   856     if (!layer) {

   857       layer = aManager->CreateRefLayer();

   858     }

   859     if (!layer) {

   860       // Probably a temporary layer manager that doesn't know how to

   861       // use ref layers.

   862       return nullptr;

   863     }

   864     static_cast<RefLayer*>(layer.get())->SetReferentId(id);

   865     nsIntPoint offset = GetContentRectLayerOffset(aFrame, aBuilder);

   866     layer->SetVisibleRegion(aVisibleRect - offset);

   867     // We can only have an offset if we're a child of an inactive

   868     // container, but our display item is LAYER_ACTIVE_FORCE which

   869     // forces all layers above to be active.

   870     MOZ_ASSERT(aContainerParameters.mOffset == nsIntPoint());

   871     gfx::Matrix4x4 m;

   872     m.Translate(offset.x, offset.y, 0.0);

   873     // Remote content can't be repainted by us, so we multiply down

   874     // the resolution that our container expects onto our container.

   875     m.Scale(aContainerParameters.mXScale, aContainerParameters.mYScale, 1.0);

   876     layer->SetBaseTransform(m);

   878     return layer.forget();

   879   }

   881   if (mContainer) {

   882     ClearContainer(mContainer);

   883     mContainer->SetPreScale(1.0f, 1.0f);

   884     mContainer->SetPostScale(1.0f, 1.0f);

   885     mContainer->SetInheritedScale(1.0f, 1.0f);

   886   }

   888   Layer* shadowRoot = GetRootLayer();

   889   if (!shadowRoot) {

   890     mContainer = nullptr;

   891     return nullptr;

   892   }

   894   NS_ABORT_IF_FALSE(!shadowRoot || shadowRoot->Manager() == aManager,

   895                     "retaining manager changed out from under us ... HELP!");

   897   // Wrap the shadow layer tree in mContainer.

   898   if (!mContainer) {

   899     mContainer = aManager->CreateContainerLayer();

   900   }

   901   NS_ABORT_IF_FALSE(!mContainer->GetFirstChild(),

   902                     "container of shadow tree shouldn't have a 'root' here");

   904   mContainer->InsertAfter(shadowRoot, nullptr);

   906   AssertInTopLevelChromeDoc(mContainer, aFrame);

   907   ViewTransform transform;

   908   TransformShadowTree(aBuilder, mFrameLoader, aFrame, shadowRoot, transform);

   909   mContainer->SetClipRect(nullptr);

   911   if (mFrameLoader->AsyncScrollEnabled()) {

   912     const nsContentView* view = GetRootContentView();

   913     BuildBackgroundPatternFor(mContainer,

   914                               shadowRoot,

   915                               view->GetViewConfig(),

   916                               mBackgroundColor,

   917                               aManager, aFrame);

   918   }

   919   mContainer->SetVisibleRegion(aVisibleRect);

   921   return nsRefPtr<Layer>(mContainer).forget();

   922 }

   924 void

   925 RenderFrameParent::OwnerContentChanged(nsIContent* aContent)

   926 {

   927   NS_ABORT_IF_FALSE(mFrameLoader->GetOwnerContent() == aContent,

   928                     "Don't build new map if owner is same!");

   929   BuildViewMap();

   930 }

   932 void

   933 RenderFrameParent::NotifyInputEvent(WidgetInputEvent& aEvent,

   934                                     ScrollableLayerGuid* aOutTargetGuid)

   935 {

   936   if (GetApzcTreeManager()) {

   937     GetApzcTreeManager()->ReceiveInputEvent(aEvent, aOutTargetGuid);

   938   }

   939 }

   941 void

   942 RenderFrameParent::ActorDestroy(ActorDestroyReason why)

   943 {

   944   if (mLayersId != 0) {

   945     CompositorParent::DeallocateLayerTreeId(mLayersId);

   946     if (mContentController) {

   947       // Stop our content controller from requesting repaints of our

   948       // content.

   949       mContentController->ClearRenderFrame();

   950       // TODO: notify the compositor?

   951     }

   952   }

   954   if (mFrameLoader && mFrameLoader->GetCurrentRemoteFrame() == this) {

   955     // XXX this might cause some weird issues ... we'll just not

   956     // redraw the part of the window covered by this until the "next"

   957     // remote frame has a layer-tree transaction.  For

   958     // why==NormalShutdown, we'll definitely want to do something

   959     // better, especially as nothing guarantees another Update() from

   960     // the "next" remote layer tree.

   961     mFrameLoader->SetCurrentRemoteFrame(nullptr);

   962   }

   963   mFrameLoader = nullptr;

   964 }

   966 bool

   967 RenderFrameParent::RecvNotifyCompositorTransaction()

   968 {

   969   TriggerRepaint();

   970   return true;

   971 }

   973 bool

   974 RenderFrameParent::RecvUpdateHitRegion(const nsRegion& aRegion)

   975 {

   976   mTouchRegion = aRegion;

   977   if (mContentController) {

   978     // Tell the content controller about the touch-sensitive region, so

   979     // that it can provide it to APZ. This is required for APZ to do

   980     // correct hit testing for a remote 'mozpasspointerevents' iframe

   981     // until bug 928833 is fixed.

   982     mContentController->SetTouchSensitiveRegion(aRegion);

   983   }

   984   return true;

   985 }

   987 PLayerTransactionParent*

   988 RenderFrameParent::AllocPLayerTransactionParent()

   989 {

   990   if (!mFrameLoader || mFrameLoaderDestroyed) {

   991     return nullptr;

   992   }

   993   nsRefPtr<LayerManager> lm = GetFrom(mFrameLoader);

   994   LayerTransactionParent* result = new LayerTransactionParent(lm->AsLayerManagerComposite(), this, 0);

   995   result->AddIPDLReference();

   996   return result;

   997 }

   999 bool

  1000 RenderFrameParent::DeallocPLayerTransactionParent(PLayerTransactionParent* aLayers)

  1001 {

  1002   static_cast<LayerTransactionParent*>(aLayers)->ReleaseIPDLReference();

  1003   return true;

  1004 }

  1006 void

  1007 RenderFrameParent::BuildViewMap()

  1008 {

  1009   ViewMap newContentViews;

  1010   // BuildViewMap assumes we have a primary frame, which may not be the case.

  1011   if (GetRootLayer() && mFrameLoader->GetPrimaryFrameOfOwningContent()) {

  1012     // Some of the content views in our hash map may no longer be active. To

  1013     // tag them as inactive and to remove any chance of them using a dangling

  1014     // pointer, we set mContentView to nullptr.

  1015     //

  1016     // BuildViewMap will restore mFrameLoader if the content view is still

  1017     // in our hash table.

  1019     for (ViewMap::const_iterator iter = mContentViews.begin();

  1020          iter != mContentViews.end();

  1021          ++iter) {

  1022       iter->second->mFrameLoader = nullptr;

  1023     }

  1025     mozilla::layout::BuildViewMap(mContentViews, newContentViews, mFrameLoader, GetRootLayer());

  1026   }

  1028   // Here, we guarantee that *only* the root view is preserved in

  1029   // case we couldn't build a new view map above. This is important because

  1030   // the content view map should only contain the root view and content

  1031   // views that are present in the layer tree.

  1032   if (newContentViews.empty()) {

  1033     nsContentView* rootView = FindRootView(mContentViews);

  1034     if (rootView)

  1035       newContentViews[rootView->GetId()] = rootView;

  1036   }

  1038   mContentViews = newContentViews;

  1039 }

  1041 void

  1042 RenderFrameParent::TriggerRepaint()

  1043 {

  1044   mFrameLoader->SetCurrentRemoteFrame(this);

  1046   nsIFrame* docFrame = mFrameLoader->GetPrimaryFrameOfOwningContent();

  1047   if (!docFrame) {

  1048     // Bad, but nothing we can do about it (XXX/cjones: or is there?

  1049     // maybe bug 589337?).  When the new frame is created, we'll

  1050     // probably still be the current render frame and will get to draw

  1051     // our content then.  Or, we're shutting down and this update goes

  1052     // to /dev/null.

  1053     return;

  1054   }

  1056   docFrame->InvalidateLayer(nsDisplayItem::TYPE_REMOTE);

  1057 }

  1059 LayerTransactionParent*

  1060 RenderFrameParent::GetShadowLayers() const

  1061 {

  1062   const InfallibleTArray<PLayerTransactionParent*>& shadowParents = ManagedPLayerTransactionParent();

  1063   NS_ABORT_IF_FALSE(shadowParents.Length() <= 1,

  1064                     "can only support at most 1 LayerTransactionParent");

  1065   return (shadowParents.Length() == 1) ?

  1066     static_cast<LayerTransactionParent*>(shadowParents[0]) : nullptr;

  1067 }

  1069 uint64_t

  1070 RenderFrameParent::GetLayerTreeId() const

  1071 {

  1072   return mLayersId;

  1073 }

  1075 Layer*

  1076 RenderFrameParent::GetRootLayer() const

  1077 {

  1078   LayerTransactionParent* shadowLayers = GetShadowLayers();

  1079   return shadowLayers ? shadowLayers->GetRoot() : nullptr;

  1080 }

  1082 void

  1083 RenderFrameParent::BuildDisplayList(nsDisplayListBuilder* aBuilder,

  1084                                     nsSubDocumentFrame* aFrame,

  1085                                     const nsRect& aDirtyRect,

  1086                                     const nsDisplayListSet& aLists)

  1087 {

  1088   // We're the subdoc for <browser remote="true"> and it has

  1089   // painted content.  Display its shadow layer tree.

  1090   DisplayListClipState::AutoSaveRestore clipState(aBuilder);

  1092   nsPoint offset = aBuilder->ToReferenceFrame(aFrame);

  1093   nsRect bounds = aFrame->EnsureInnerView()->GetBounds() + offset;

  1094   clipState.ClipContentDescendants(bounds);

  1096   Layer* container = GetRootLayer();

  1097   if (aBuilder->IsForEventDelivery() && container) {

  1098     ViewTransform offset =

  1099       ViewTransform(GetContentRectLayerOffset(aFrame, aBuilder));

  1100     BuildListForLayer(container, mFrameLoader, offset,

  1101                       aBuilder, *aLists.Content(), aFrame);

  1102   } else {

  1103     aLists.Content()->AppendToTop(

  1104       new (aBuilder) nsDisplayRemote(aBuilder, aFrame, this));

  1105   }

  1106 }

  1108 void

  1109 RenderFrameParent::ZoomToRect(uint32_t aPresShellId, ViewID aViewId,

  1110                               const CSSRect& aRect)

  1111 {

  1112   if (GetApzcTreeManager()) {

  1113     GetApzcTreeManager()->ZoomToRect(ScrollableLayerGuid(mLayersId, aPresShellId, aViewId),

  1114                                      aRect);

  1115   }

  1116 }

  1118 void

  1119 RenderFrameParent::ContentReceivedTouch(const ScrollableLayerGuid& aGuid,

  1120                                         bool aPreventDefault)

  1121 {

  1122   if (aGuid.mLayersId != mLayersId) {

  1123     // Guard against bad data from hijacked child processes

  1124     NS_ERROR("Unexpected layers id in ContentReceivedTouch; dropping message...");

  1125     return;

  1126   }

  1127   if (GetApzcTreeManager()) {

  1128     GetApzcTreeManager()->ContentReceivedTouch(aGuid, aPreventDefault);

  1129   }

  1130 }

  1132 void

  1133 RenderFrameParent::UpdateZoomConstraints(uint32_t aPresShellId,

  1134                                          ViewID aViewId,

  1135                                          bool aIsRoot,

  1136                                          const ZoomConstraints& aConstraints)

  1137 {

  1138   if (mContentController && aIsRoot) {

  1139     mContentController->SaveZoomConstraints(aConstraints);

  1140   }

  1141   if (GetApzcTreeManager()) {

  1142     GetApzcTreeManager()->UpdateZoomConstraints(ScrollableLayerGuid(mLayersId, aPresShellId, aViewId),

  1143                                                 aConstraints);

  1144   }

  1145 }

  1147 bool

  1148 RenderFrameParent::HitTest(const nsRect& aRect)

  1149 {

  1150   return mTouchRegion.Contains(aRect);

  1151 }

  1153 }  // namespace layout

  1154 }  // namespace mozilla

  1156 already_AddRefed<Layer>

  1157 nsDisplayRemote::BuildLayer(nsDisplayListBuilder* aBuilder,

  1158                             LayerManager* aManager,

  1159                             const ContainerLayerParameters& aContainerParameters)

  1160 {

  1161   int32_t appUnitsPerDevPixel = mFrame->PresContext()->AppUnitsPerDevPixel();

  1162   nsIntRect visibleRect = GetVisibleRect().ToNearestPixels(appUnitsPerDevPixel);

  1163   visibleRect += aContainerParameters.mOffset;

  1164   nsRefPtr<Layer> layer = mRemoteFrame->BuildLayer(aBuilder, mFrame, aManager, visibleRect, this, aContainerParameters);

  1165   return layer.forget();

  1166 }

  1168 void

  1169 nsDisplayRemote::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,

  1170                          HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames)

  1171 {

  1172   if (mRemoteFrame->HitTest(aRect)) {

  1173     aOutFrames->AppendElement(mFrame);

  1174   }

  1175 }

  1177 void

  1178 nsDisplayRemoteShadow::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,

  1179                          HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames)

  1180 {

  1181   // If we are here, then rects have intersected.

  1182   //

  1183   // XXX I think iframes and divs can be rounded like anything else but we don't

  1184   //     cover that case here.

  1185   //

  1186   if (aState->mShadows) {

  1187     aState->mShadows->AppendElement(mId);

  1188   }

  1189 }

The Tor Browser / file revision

layout/ipc/RenderFrameParent.cpp@44a2da4a2ab2

layout/ipc/RenderFrameParent.cpp