Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1681 insertions, 0 deletions

diff --git a/layout/generic/nsPluginFrame.cpp b/layout/generic/nsPluginFrame.cpp
new file mode 100644
index 0000000000..2a9670b2b8
--- /dev/null
+++ b/layout/generic/nsPluginFrame.cpp
@@ -0,0 +1,1681 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+/* rendering objects for replaced elements implemented by a plugin */
+
+#include "nsPluginFrame.h"
+
+#include "gfx2DGlue.h"
+#include "gfxContext.h"
+#include "gfxMatrix.h"
+#include "mozilla/gfx/2D.h"
+#include "mozilla/BasicEvents.h"
+#include "mozilla/MouseEvents.h"
+#include "mozilla/PresShell.h"
+#ifdef XP_WIN
+// This is needed for DoublePassRenderingEvent.
+#  include "mozilla/plugins/PluginMessageUtils.h"
+#endif
+
+#include "nscore.h"
+#include "nsCOMPtr.h"
+#include "nsPresContext.h"
+#include "nsWidgetsCID.h"
+#include "nsView.h"
+#include "nsViewManager.h"
+#include "nsString.h"
+#include "nsGkAtoms.h"
+#include "nsNPAPIPluginInstance.h"
+#include "npapi.h"
+#include "nsIObjectLoadingContent.h"
+#include "nsContentUtils.h"
+#include "nsDisplayList.h"
+#include "nsFocusManager.h"
+#include "nsLayoutUtils.h"
+#include "nsFrameManager.h"
+#include "nsIObserverService.h"
+#include "GeckoProfiler.h"
+#include <algorithm>
+
+#include "nsIObjectFrame.h"
+#include "nsPluginNativeWindow.h"
+#include "FrameLayerBuilder.h"
+
+#include "ImageLayers.h"
+#include "nsPluginInstanceOwner.h"
+
+#ifdef XP_WIN
+#  include "gfxWindowsNativeDrawing.h"
+#  include "gfxWindowsSurface.h"
+#endif
+
+#include "Layers.h"
+#include "ReadbackLayer.h"
+#include "ImageContainer.h"
+#include "mozilla/layers/RenderRootStateManager.h"
+
+// accessibility support
+#ifdef ACCESSIBILITY
+#  include "nsAccessibilityService.h"
+#endif
+
+#include "mozilla/Logging.h"
+
+#ifdef XP_MACOSX
+#  include "gfxQuartzNativeDrawing.h"
+#  include "mozilla/gfx/QuartzSupport.h"
+#endif
+
+#ifdef MOZ_X11
+#  include "mozilla/X11Util.h"
+#endif
+
+#ifdef XP_WIN
+#  include <wtypes.h>
+#  include <winuser.h>
+#endif
+
+#include "mozilla/dom/BrowserChild.h"
+
+#ifdef CreateEvent  // Thank you MS.
+#  undef CreateEvent
+#endif
+
+static mozilla::LazyLogModule sPluginFrameLog("nsPluginFrame");
+
+using namespace mozilla;
+using namespace mozilla::gfx;
+using namespace mozilla::layers;
+
+class PluginBackgroundSink : public ReadbackSink {
+ public:
+  PluginBackgroundSink(nsPluginFrame* aFrame, uint64_t aStartSequenceNumber)
+      : mLastSequenceNumber(aStartSequenceNumber), mFrame(aFrame) {}
+  ~PluginBackgroundSink() override {
+    if (mFrame) {
+      mFrame->mBackgroundSink = nullptr;
+    }
+  }
+
+  void SetUnknown(uint64_t aSequenceNumber) override {
+    if (!AcceptUpdate(aSequenceNumber)) return;
+    mFrame->mInstanceOwner->SetBackgroundUnknown();
+  }
+
+  already_AddRefed<DrawTarget> BeginUpdate(const nsIntRect& aRect,
+                                           uint64_t aSequenceNumber) override {
+    if (!AcceptUpdate(aSequenceNumber)) return nullptr;
+    return mFrame->mInstanceOwner->BeginUpdateBackground(aRect);
+  }
+
+  void EndUpdate(const nsIntRect& aRect) override {
+    return mFrame->mInstanceOwner->EndUpdateBackground(aRect);
+  }
+
+  void Destroy() { mFrame = nullptr; }
+
+ protected:
+  bool AcceptUpdate(uint64_t aSequenceNumber) {
+    if (aSequenceNumber > mLastSequenceNumber && mFrame &&
+        mFrame->mInstanceOwner) {
+      mLastSequenceNumber = aSequenceNumber;
+      return true;
+    }
+    return false;
+  }
+
+  uint64_t mLastSequenceNumber;
+  nsPluginFrame* mFrame;
+};
+
+nsPluginFrame::nsPluginFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
+    : nsIFrame(aStyle, aPresContext, kClassID),
+      mInstanceOwner(nullptr),
+      mOuterView(nullptr),
+      mInnerView(nullptr),
+      mBackgroundSink(nullptr),
+      mReflowCallbackPosted(false) {
+  MOZ_LOG(sPluginFrameLog, LogLevel::Debug,
+          ("Created new nsPluginFrame %p\n", this));
+}
+
+nsPluginFrame::~nsPluginFrame() {
+  MOZ_LOG(sPluginFrameLog, LogLevel::Debug,
+          ("nsPluginFrame %p deleted\n", this));
+}
+
+NS_QUERYFRAME_HEAD(nsPluginFrame)
+  NS_QUERYFRAME_ENTRY(nsPluginFrame)
+  NS_QUERYFRAME_ENTRY(nsIObjectFrame)
+NS_QUERYFRAME_TAIL_INHERITING(nsIFrame)
+
+#ifdef ACCESSIBILITY
+a11y::AccType nsPluginFrame::AccessibleType() { return a11y::ePluginType; }
+
+#  ifdef XP_WIN
+NS_IMETHODIMP nsPluginFrame::GetPluginPort(HWND* aPort) {
+  *aPort = (HWND)mInstanceOwner->GetPluginPort();
+  return NS_OK;
+}
+#  endif
+#endif
+
+void nsPluginFrame::Init(nsIContent* aContent, nsContainerFrame* aParent,
+                         nsIFrame* aPrevInFlow) {
+  MOZ_LOG(sPluginFrameLog, LogLevel::Debug,
+          ("Initializing nsPluginFrame %p for content %p\n", this, aContent));
+
+  nsIFrame::Init(aContent, aParent, aPrevInFlow);
+  CreateView();
+}
+
+void nsPluginFrame::DestroyFrom(nsIFrame* aDestructRoot,
+                                PostDestroyData& aPostDestroyData) {
+  if (mReflowCallbackPosted) {
+    PresShell()->CancelReflowCallback(this);
+  }
+
+  // Ensure our DidComposite observer is gone.
+  mDidCompositeObserver = nullptr;
+
+  // Tell content owner of the instance to disconnect its frame.
+  nsCOMPtr<nsIObjectLoadingContent> objContent(do_QueryInterface(mContent));
+  NS_ASSERTION(objContent, "Why not an object loading content?");
+
+  // The content might not have a reference to the instance owner any longer in
+  // the case of re-entry during instantiation or teardown, so make sure we're
+  // dissociated.
+  if (mInstanceOwner) {
+    mInstanceOwner->SetFrame(nullptr);
+  }
+  objContent->HasNewFrame(nullptr);
+
+  if (mBackgroundSink) {
+    mBackgroundSink->Destroy();
+  }
+
+  nsIFrame::DestroyFrom(aDestructRoot, aPostDestroyData);
+}
+
+/* virtual */
+void nsPluginFrame::DidSetComputedStyle(ComputedStyle* aOldComputedStyle) {
+  if (HasView()) {
+    nsView* view = GetView();
+    nsViewManager* vm = view->GetViewManager();
+    if (vm) {
+      nsViewVisibility visibility =
+          IsHidden() ? nsViewVisibility_kHide : nsViewVisibility_kShow;
+      vm->SetViewVisibility(view, visibility);
+    }
+  }
+
+  nsIFrame::DidSetComputedStyle(aOldComputedStyle);
+}
+
+#ifdef DEBUG_FRAME_DUMP
+nsresult nsPluginFrame::GetFrameName(nsAString& aResult) const {
+  return MakeFrameName(u"PluginFrame"_ns, aResult);
+}
+#endif
+
+nsresult nsPluginFrame::PrepForDrawing(nsIWidget* aWidget) {
+  mWidget = aWidget;
+
+  nsView* view = GetView();
+  NS_ASSERTION(view, "Object frames must have views");
+  if (!view) {
+    return NS_ERROR_FAILURE;
+  }
+
+  nsViewManager* viewMan = view->GetViewManager();
+  // mark the view as hidden since we don't know the (x,y) until Paint
+  // XXX is the above comment correct?
+  viewMan->SetViewVisibility(view, nsViewVisibility_kHide);
+
+  // this is ugly. it was ripped off from didreflow(). MMP
+  // Position and size view relative to its parent, not relative to our
+  // parent frame (our parent frame may not have a view).
+
+  nsView* parentWithView;
+  nsPoint origin;
+  nsRect r(0, 0, mRect.width, mRect.height);
+
+  GetOffsetFromView(origin, &parentWithView);
+  viewMan->ResizeView(view, r);
+  viewMan->MoveViewTo(view, origin.x, origin.y);
+
+  nsPresContext* presContext = PresContext();
+  nsRootPresContext* rpc = presContext->GetRootPresContext();
+  if (!rpc) {
+    return NS_ERROR_FAILURE;
+  }
+
+  if (mWidget) {
+    // Disallow windowed plugins in popups
+    nsIFrame* rootFrame = rpc->PresShell()->GetRootFrame();
+    nsIWidget* parentWidget = rootFrame->GetNearestWidget();
+    if (!parentWidget ||
+        nsLayoutUtils::GetDisplayRootFrame(this) != rootFrame) {
+      return NS_ERROR_FAILURE;
+    }
+
+    // We can already have mInnerView if our instance owner went away and then
+    // came back. So clear the old one before creating a new one.
+    if (mInnerView) {
+      if (mInnerView->GetWidget()) {
+        // The widget listener should have already been cleared by
+        // SetInstanceOwner (with a null instance owner).
+        MOZ_RELEASE_ASSERT(mInnerView->GetWidget()->GetWidgetListener() ==
+                           nullptr);
+      }
+      mInnerView->Destroy();
+      mInnerView = nullptr;
+    }
+    mInnerView = viewMan->CreateView(GetContentRectRelativeToSelf(), view);
+    if (!mInnerView) {
+      NS_ERROR("Could not create inner view");
+      return NS_ERROR_OUT_OF_MEMORY;
+    }
+    viewMan->InsertChild(view, mInnerView, nullptr, true);
+
+    mWidget->SetParent(parentWidget);
+    mWidget->Enable(true);
+    mWidget->Show(true);
+
+    // Set the plugin window to have an empty clip region until we know
+    // what our true position, size and clip region are. These
+    // will be reset when nsRootPresContext computes our true
+    // geometry. The plugin window does need to have a good size here, so
+    // set the size explicitly to a reasonable guess.
+    AutoTArray<nsIWidget::Configuration, 1> configurations;
+    nsIWidget::Configuration* configuration = configurations.AppendElement();
+    nscoord appUnitsPerDevPixel = presContext->AppUnitsPerDevPixel();
+    configuration->mChild = mWidget;
+    configuration->mBounds.width =
+        NSAppUnitsToIntPixels(mRect.width, appUnitsPerDevPixel);
+    configuration->mBounds.height =
+        NSAppUnitsToIntPixels(mRect.height, appUnitsPerDevPixel);
+    parentWidget->ConfigureChildren(configurations);
+
+    mInnerView->AttachWidgetEventHandler(mWidget);
+
+#ifdef XP_MACOSX
+    // On Mac, we need to invalidate ourselves since even windowed
+    // plugins are painted through Thebes and we need to ensure
+    // the PaintedLayer containing the plugin is updated.
+    if (parentWidget == GetNearestWidget()) {
+      InvalidateFrame();
+    }
+#endif
+
+    RegisterPluginForGeometryUpdates();
+
+    // Here we set the background color for this widget because some plugins
+    // will use the child window background color when painting. If it's not
+    // set, it may default to gray Sometimes, a frame doesn't have a background
+    // color or is transparent. In this case, walk up the frame tree until we do
+    // find a frame with a background color
+    for (nsIFrame* frame = this; frame; frame = frame->GetParent()) {
+      nscolor bgcolor =
+          frame->GetVisitedDependentColor(&nsStyleBackground::mBackgroundColor);
+      if (NS_GET_A(bgcolor) > 0) {  // make sure we got an actual color
+        mWidget->SetBackgroundColor(bgcolor);
+        break;
+      }
+    }
+  } else {
+    // Changing to windowless mode changes the NPWindow geometry.
+    FixupWindow(GetContentRectRelativeToSelf().Size());
+    RegisterPluginForGeometryUpdates();
+  }
+
+  if (!IsHidden()) {
+    viewMan->SetViewVisibility(view, nsViewVisibility_kShow);
+  }
+
+#ifdef ACCESSIBILITY
+  ;
+  if (nsAccessibilityService* accService =
+          PresShell::GetAccessibilityService()) {
+    accService->RecreateAccessible(PresShell(), mContent);
+  }
+#endif
+
+  return NS_OK;
+}
+
+#define EMBED_DEF_WIDTH 240
+#define EMBED_DEF_HEIGHT 200
+
+/* virtual */
+nscoord nsPluginFrame::GetMinISize(gfxContext* aRenderingContext) {
+  nscoord result = 0;
+
+  if (!IsHidden(false)) {
+    if (mContent->IsHTMLElement(nsGkAtoms::embed)) {
+      bool vertical = GetWritingMode().IsVertical();
+      result = nsPresContext::CSSPixelsToAppUnits(vertical ? EMBED_DEF_HEIGHT
+                                                           : EMBED_DEF_WIDTH);
+    }
+  }
+
+  DISPLAY_MIN_INLINE_SIZE(this, result);
+  return result;
+}
+
+/* virtual */
+nscoord nsPluginFrame::GetPrefISize(gfxContext* aRenderingContext) {
+  return nsPluginFrame::GetMinISize(aRenderingContext);
+}
+
+void nsPluginFrame::GetWidgetConfiguration(
+    nsTArray<nsIWidget::Configuration>* aConfigurations) {
+  if (!mWidget) {
+    return;
+  }
+
+  if (!mWidget->GetParent()) {
+    // Plugin widgets should not be toplevel except when they're out of the
+    // document, in which case the plugin should not be registered for
+    // geometry updates and this should not be called. But apparently we
+    // have bugs where mWidget sometimes is toplevel here. Bail out.
+    NS_ERROR(
+        "Plugin widgets registered for geometry updates should not be "
+        "toplevel");
+    return;
+  }
+
+  nsIWidget::Configuration* configuration = aConfigurations->AppendElement();
+  configuration->mChild = mWidget;
+  configuration->mBounds = mNextConfigurationBounds;
+  configuration->mClipRegion = mNextConfigurationClipRegion.Clone();
+#if defined(XP_WIN) || defined(MOZ_WIDGET_GTK)
+  if (XRE_IsContentProcess()) {
+    configuration->mWindowID =
+        (uintptr_t)mWidget->GetNativeData(NS_NATIVE_PLUGIN_PORT);
+    configuration->mVisible = mWidget->IsVisible();
+  }
+#endif  // defined(XP_WIN) || defined(MOZ_WIDGET_GTK)
+}
+
+void nsPluginFrame::GetDesiredSize(nsPresContext* aPresContext,
+                                   const ReflowInput& aReflowInput,
+                                   ReflowOutput& aMetrics) {
+  // By default, we have no area
+  aMetrics.ClearSize();
+
+  if (IsHidden(false)) {
+    return;
+  }
+
+  aMetrics.Width() = aReflowInput.ComputedWidth();
+  aMetrics.Height() = aReflowInput.ComputedHeight();
+
+  // for EMBED, default to 240x200 for compatibility
+  if (mContent->IsHTMLElement(nsGkAtoms::embed)) {
+    if (aMetrics.Width() == NS_UNCONSTRAINEDSIZE) {
+      aMetrics.Width() = clamped(
+          nsPresContext::CSSPixelsToAppUnits(EMBED_DEF_WIDTH),
+          aReflowInput.ComputedMinWidth(), aReflowInput.ComputedMaxWidth());
+    }
+    if (aMetrics.Height() == NS_UNCONSTRAINEDSIZE) {
+      aMetrics.Height() = clamped(
+          nsPresContext::CSSPixelsToAppUnits(EMBED_DEF_HEIGHT),
+          aReflowInput.ComputedMinHeight(), aReflowInput.ComputedMaxHeight());
+    }
+
+#if defined(MOZ_WIDGET_GTK)
+    // We need to make sure that the size of the object frame does not
+    // exceed the maximum size of X coordinates.  See bug #225357 for
+    // more information.  In theory Gtk2 can handle large coordinates,
+    // but underlying plugins can't.
+    aMetrics.Height() = std::min(aPresContext->DevPixelsToAppUnits(INT16_MAX),
+                                 aMetrics.Height());
+    aMetrics.Width() = std::min(aPresContext->DevPixelsToAppUnits(INT16_MAX),
+                                aMetrics.Width());
+#endif
+  }
+
+  // At this point, the width has an unconstrained value only if we have
+  // nothing to go on (no width set, no information from the plugin, nothing).
+  // Make up a number.
+  if (aMetrics.Width() == NS_UNCONSTRAINEDSIZE) {
+    aMetrics.Width() = (aReflowInput.ComputedMinWidth() != NS_UNCONSTRAINEDSIZE)
+                           ? aReflowInput.ComputedMinWidth()
+                           : 0;
+  }
+
+  // At this point, the height has an unconstrained value only in two cases:
+  // a) We are in standards mode with percent heights and parent is auto-height
+  // b) We have no height information at all.
+  // In either case, we have to make up a number.
+  if (aMetrics.Height() == NS_UNCONSTRAINEDSIZE) {
+    aMetrics.Height() =
+        (aReflowInput.ComputedMinHeight() != NS_UNCONSTRAINEDSIZE)
+            ? aReflowInput.ComputedMinHeight()
+            : 0;
+  }
+
+  // XXXbz don't add in the border and padding, because we screw up our
+  // plugin's size and positioning if we do...  Eventually we _do_ want to
+  // paint borders, though!  At that point, we will need to adjust the desired
+  // size either here or in Reflow....  Further, we will need to fix Paint() to
+  // call the superclass in all cases.
+}
+
+void nsPluginFrame::Reflow(nsPresContext* aPresContext, ReflowOutput& aMetrics,
+                           const ReflowInput& aReflowInput,
+                           nsReflowStatus& aStatus) {
+  MarkInReflow();
+  DO_GLOBAL_REFLOW_COUNT("nsPluginFrame");
+  DISPLAY_REFLOW(aPresContext, this, aReflowInput, aMetrics, aStatus);
+  MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
+
+  // Get our desired size
+  GetDesiredSize(aPresContext, aReflowInput, aMetrics);
+  aMetrics.SetOverflowAreasToDesiredBounds();
+  FinishAndStoreOverflow(&aMetrics);
+
+  // delay plugin instantiation until all children have
+  // arrived. Otherwise there may be PARAMs or other stuff that the
+  // plugin needs to see that haven't arrived yet.
+  if (!GetContent()->IsDoneAddingChildren()) {
+    return;
+  }
+
+  // if we are printing or print previewing, bail for now
+  if (aPresContext->Medium() == nsGkAtoms::print) {
+    return;
+  }
+
+  nsRect r(0, 0, aMetrics.Width(), aMetrics.Height());
+  r.Deflate(aReflowInput.ComputedPhysicalBorderPadding());
+
+  if (mInnerView) {
+    nsViewManager* vm = mInnerView->GetViewManager();
+    vm->MoveViewTo(mInnerView, r.x, r.y);
+    vm->ResizeView(mInnerView, nsRect(nsPoint(0, 0), r.Size()), true);
+  }
+
+  FixupWindow(r.Size());
+  if (!mReflowCallbackPosted) {
+    mReflowCallbackPosted = true;
+    aPresContext->PresShell()->PostReflowCallback(this);
+  }
+
+  NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aMetrics);
+}
+
+///////////// nsIReflowCallback ///////////////
+
+bool nsPluginFrame::ReflowFinished() {
+  mReflowCallbackPosted = false;
+  CallSetWindow();
+  return true;
+}
+
+void nsPluginFrame::ReflowCallbackCanceled() { mReflowCallbackPosted = false; }
+
+void nsPluginFrame::FixupWindow(const nsSize& aSize) {
+  nsPresContext* presContext = PresContext();
+
+  if (!mInstanceOwner) return;
+
+  NPWindow* window;
+  mInstanceOwner->GetWindow(window);
+
+  NS_ENSURE_TRUE_VOID(window);
+
+  bool windowless = (window->type == NPWindowTypeDrawable);
+
+  nsIntPoint origin = GetWindowOriginInPixels(windowless);
+
+  // window must be in "display pixels"
+#if defined(XP_MACOSX)
+  // window must be in "display pixels"
+  double scaleFactor = 1.0;
+  if (NS_FAILED(mInstanceOwner->GetContentsScaleFactor(&scaleFactor))) {
+    scaleFactor = 1.0;
+  }
+  int intScaleFactor = ceil(scaleFactor);
+  window->x = origin.x / intScaleFactor;
+  window->y = origin.y / intScaleFactor;
+  window->width =
+      presContext->AppUnitsToDevPixels(aSize.width) / intScaleFactor;
+  window->height =
+      presContext->AppUnitsToDevPixels(aSize.height) / intScaleFactor;
+#else
+  window->x = origin.x;
+  window->y = origin.y;
+  window->width = presContext->AppUnitsToDevPixels(aSize.width);
+  window->height = presContext->AppUnitsToDevPixels(aSize.height);
+#endif
+
+#ifndef XP_MACOSX
+  mInstanceOwner->UpdateWindowPositionAndClipRect(false);
+#endif
+
+  NotifyPluginReflowObservers();
+}
+
+nsresult nsPluginFrame::CallSetWindow(bool aCheckIsHidden) {
+  NPWindow* win = nullptr;
+
+  nsresult rv = NS_ERROR_FAILURE;
+  RefPtr<nsNPAPIPluginInstance> pi;
+  if (!mInstanceOwner || !(pi = mInstanceOwner->GetInstance()) ||
+      NS_FAILED(rv = mInstanceOwner->GetWindow(win)) || !win)
+    return rv;
+
+  nsPluginNativeWindow* window = (nsPluginNativeWindow*)win;
+
+  if (aCheckIsHidden && IsHidden()) return NS_ERROR_FAILURE;
+
+  // Calling either nsPluginInstanceOwner::FixUpPluginWindow() (here,
+  // on OS X) or SetWindow() (below, on all platforms) can destroy this
+  // frame.  (FixUpPluginWindow() calls SetWindow()).  So grab a safe
+  // reference to mInstanceOwner which we can use below, if needed.
+  RefPtr<nsPluginInstanceOwner> instanceOwnerRef(mInstanceOwner);
+
+  // refresh the plugin port as well
+#ifdef XP_MACOSX
+  mInstanceOwner->FixUpPluginWindow(nsPluginInstanceOwner::ePluginPaintEnable);
+  // Bail now if our frame has been destroyed.
+  if (!instanceOwnerRef->GetFrame()) {
+    return NS_ERROR_FAILURE;
+  }
+#endif
+  window->window = mInstanceOwner->GetPluginPort();
+
+  // Adjust plugin dimensions according to pixel snap results
+  // and reduce amount of SetWindow calls
+  nsPresContext* presContext = PresContext();
+  nsRootPresContext* rootPC = presContext->GetRootPresContext();
+  if (!rootPC) return NS_ERROR_FAILURE;
+  int32_t appUnitsPerDevPixel = presContext->AppUnitsPerDevPixel();
+  nsIFrame* rootFrame = rootPC->PresShell()->GetRootFrame();
+  nsRect bounds =
+      GetContentRectRelativeToSelf() + GetOffsetToCrossDoc(rootFrame);
+  nsIntRect intBounds = bounds.ToNearestPixels(appUnitsPerDevPixel);
+
+  // In e10s, this returns the offset to the top level window, in non-e10s
+  // it return 0,0.
+  LayoutDeviceIntPoint intOffset = GetRemoteTabChromeOffset();
+  intBounds.x += intOffset.x;
+  intBounds.y += intOffset.y;
+
+#if defined(XP_MACOSX)
+  // window must be in "display pixels"
+  double scaleFactor = 1.0;
+  if (NS_FAILED(instanceOwnerRef->GetContentsScaleFactor(&scaleFactor))) {
+    scaleFactor = 1.0;
+  }
+
+  size_t intScaleFactor = ceil(scaleFactor);
+  window->x = intBounds.x / intScaleFactor;
+  window->y = intBounds.y / intScaleFactor;
+  window->width = intBounds.width / intScaleFactor;
+  window->height = intBounds.height / intScaleFactor;
+#else
+  window->x = intBounds.x;
+  window->y = intBounds.y;
+  window->width = intBounds.width;
+  window->height = intBounds.height;
+#endif
+  // BE CAREFUL: By the time we get here the PluginFrame is sometimes destroyed
+  // and poisoned. If we reference local fields (implicit this deref),
+  // we will crash.
+  instanceOwnerRef->ResolutionMayHaveChanged();
+
+  // This will call pi->SetWindow and take care of window subclassing
+  // if needed, see bug 132759. Calling SetWindow can destroy this frame
+  // so check for that before doing anything else with this frame's memory.
+  if (instanceOwnerRef->UseAsyncRendering()) {
+    rv = pi->AsyncSetWindow(window);
+  } else {
+    rv = window->CallSetWindow(pi);
+  }
+
+  instanceOwnerRef->ReleasePluginPort(window->window);
+
+  return rv;
+}
+
+void nsPluginFrame::RegisterPluginForGeometryUpdates() {
+  nsRootPresContext* rpc = PresContext()->GetRootPresContext();
+  NS_ASSERTION(rpc, "We should have a root pres context!");
+  if (mRootPresContextRegisteredWith == rpc || !rpc) {
+    // Already registered with current root pres context,
+    // or null root pres context...
+    return;
+  }
+  if (mRootPresContextRegisteredWith && mRootPresContextRegisteredWith != rpc) {
+    // Registered to some other root pres context. Unregister, and
+    // re-register with our current one...
+    UnregisterPluginForGeometryUpdates();
+  }
+  mRootPresContextRegisteredWith = rpc;
+  mRootPresContextRegisteredWith->RegisterPluginForGeometryUpdates(mContent);
+}
+
+void nsPluginFrame::UnregisterPluginForGeometryUpdates() {
+  if (!mRootPresContextRegisteredWith) {
+    // Not registered...
+    return;
+  }
+  mRootPresContextRegisteredWith->UnregisterPluginForGeometryUpdates(mContent);
+  mRootPresContextRegisteredWith = nullptr;
+}
+
+void nsPluginFrame::SetInstanceOwner(nsPluginInstanceOwner* aOwner) {
+  // The ownership model here is historically fuzzy. This should only be called
+  // by nsPluginInstanceOwner when it is given a new frame, and
+  // nsObjectLoadingContent should be arbitrating frame-ownership via its
+  // HasNewFrame callback.
+  mInstanceOwner = aOwner;
+
+  // Reset the DidCompositeObserver since the owner changed.
+  mDidCompositeObserver = nullptr;
+
+  if (mInstanceOwner) {
+    return;
+  }
+
+  UnregisterPluginForGeometryUpdates();
+  if (mWidget && mInnerView) {
+    mInnerView->DetachWidgetEventHandler(mWidget);
+    // Make sure the plugin is hidden in case an update of plugin geometry
+    // hasn't happened since this plugin became hidden.
+    nsIWidget* parent = mWidget->GetParent();
+    if (parent) {
+      nsTArray<nsIWidget::Configuration> configurations;
+      nsIWidget::Configuration* configuration = configurations.AppendElement();
+      configuration->mChild = mWidget;
+      parent->ConfigureChildren(configurations);
+
+      mWidget->Show(false);
+      mWidget->Enable(false);
+      mWidget->SetParent(nullptr);
+    }
+  }
+}
+
+bool nsPluginFrame::IsHidden(bool aCheckVisibilityStyle) const {
+  if (aCheckVisibilityStyle) {
+    if (!StyleVisibility()->IsVisibleOrCollapsed()) return true;
+  }
+
+  // only <embed> tags support the HIDDEN attribute
+  if (mContent->IsHTMLElement(nsGkAtoms::embed)) {
+    // Yes, these are really the kooky ways that you could tell 4.x
+    // not to hide the <embed> once you'd put the 'hidden' attribute
+    // on the tag...
+
+    // HIDDEN w/ no attributes gets translated as we are hidden for
+    // compatibility w/ 4.x and IE so we don't create a non-painting
+    // widget in layout. See bug 188959.
+    nsAutoString hidden;
+    if (mContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::hidden,
+                                       hidden) &&
+        (hidden.IsEmpty() || (!hidden.LowerCaseEqualsLiteral("false") &&
+                              !hidden.LowerCaseEqualsLiteral("no") &&
+                              !hidden.LowerCaseEqualsLiteral("off")))) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+mozilla::LayoutDeviceIntPoint nsPluginFrame::GetRemoteTabChromeOffset() {
+  LayoutDeviceIntPoint offset;
+  if (XRE_IsContentProcess()) {
+    if (nsPIDOMWindowOuter* window = GetContent()->OwnerDoc()->GetWindow()) {
+      if (nsCOMPtr<nsPIDOMWindowOuter> topWindow = window->GetInProcessTop()) {
+        dom::BrowserChild* tc = dom::BrowserChild::GetFrom(topWindow);
+        if (tc) {
+          offset += tc->GetChromeOffset();
+        }
+      }
+    }
+  }
+  return offset;
+}
+
+nsIntPoint nsPluginFrame::GetWindowOriginInPixels(bool aWindowless) {
+  nsView* parentWithView;
+  nsPoint origin(0, 0);
+
+  GetOffsetFromView(origin, &parentWithView);
+
+  // if it's windowless, let's make sure we have our origin set right
+  // it may need to be corrected, like after scrolling
+  if (aWindowless && parentWithView) {
+    nsPoint offsetToWidget;
+    parentWithView->GetNearestWidget(&offsetToWidget);
+    origin += offsetToWidget;
+  }
+  origin += GetContentRectRelativeToSelf().TopLeft();
+
+  nsIntPoint pt(PresContext()->AppUnitsToDevPixels(origin.x),
+                PresContext()->AppUnitsToDevPixels(origin.y));
+
+  // If we're in the content process offsetToWidget is tied to the top level
+  // widget we can access in the child process, which is the tab. We need the
+  // offset all the way up to the top level native window here. (If this is
+  // non-e10s this routine will return 0,0.)
+  if (aWindowless) {
+    mozilla::LayoutDeviceIntPoint lpt = GetRemoteTabChromeOffset();
+    pt += nsIntPoint(lpt.x, lpt.y);
+  }
+
+  return pt;
+}
+
+void nsPluginFrame::DidReflow(nsPresContext* aPresContext,
+                              const ReflowInput* aReflowInput) {
+  // Do this check before calling the superclass, as that clears
+  // NS_FRAME_FIRST_REFLOW
+  if (HasAnyStateBits(NS_FRAME_FIRST_REFLOW)) {
+    nsCOMPtr<nsIObjectLoadingContent> objContent(do_QueryInterface(mContent));
+    NS_ASSERTION(objContent, "Why not an object loading content?");
+    objContent->HasNewFrame(this);
+  }
+
+  nsIFrame::DidReflow(aPresContext, aReflowInput);
+
+  if (HasView()) {
+    nsView* view = GetView();
+    nsViewManager* vm = view->GetViewManager();
+    if (vm)
+      vm->SetViewVisibility(
+          view, IsHidden() ? nsViewVisibility_kHide : nsViewVisibility_kShow);
+  }
+}
+
+/* static */
+void nsPluginFrame::PaintPrintPlugin(nsIFrame* aFrame, gfxContext* aCtx,
+                                     const nsRect& aDirtyRect, nsPoint aPt) {
+  // Translate the context:
+  nsPoint pt = aPt + aFrame->GetContentRectRelativeToSelf().TopLeft();
+  gfxPoint devPixelPt = nsLayoutUtils::PointToGfxPoint(
+      pt, aFrame->PresContext()->AppUnitsPerDevPixel());
+
+  gfxContextMatrixAutoSaveRestore autoSR(aCtx);
+  aCtx->SetMatrixDouble(aCtx->CurrentMatrixDouble().PreTranslate(devPixelPt));
+
+  // FIXME - Bug 385435: Doesn't aDirtyRect need translating too?
+
+  static_cast<nsPluginFrame*>(aFrame)->PrintPlugin(*aCtx, aDirtyRect);
+}
+
+/**
+ * nsDisplayPluginReadback creates an active ReadbackLayer. The ReadbackLayer
+ * obtains from the compositor the contents of the window underneath
+ * the ReadbackLayer, which we then use as an opaque buffer for plugins to
+ * asynchronously draw onto.
+ */
+class nsDisplayPluginReadback : public nsPaintedDisplayItem {
+ public:
+  nsDisplayPluginReadback(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame)
+      : nsPaintedDisplayItem(aBuilder, aFrame) {
+    MOZ_COUNT_CTOR(nsDisplayPluginReadback);
+  }
+#ifdef NS_BUILD_REFCNT_LOGGING
+  ~nsDisplayPluginReadback() override {
+    MOZ_COUNT_DTOR(nsDisplayPluginReadback);
+  }
+#endif
+
+  nsRect GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) const override;
+
+  NS_DISPLAY_DECL_NAME("PluginReadback", TYPE_PLUGIN_READBACK)
+
+  already_AddRefed<Layer> BuildLayer(
+      nsDisplayListBuilder* aBuilder, LayerManager* aManager,
+      const ContainerLayerParameters& aContainerParameters) override {
+    return static_cast<nsPluginFrame*>(mFrame)->BuildLayer(
+        aBuilder, aManager, this, aContainerParameters);
+  }
+
+  LayerState GetLayerState(
+      nsDisplayListBuilder* aBuilder, LayerManager* aManager,
+      const ContainerLayerParameters& aParameters) override {
+    return LayerState::LAYER_ACTIVE;
+  }
+
+  virtual nsDisplayItemGeometry* AllocateGeometry(
+      nsDisplayListBuilder* aBuilder) override {
+    return new nsDisplayPluginGeometry(this, aBuilder);
+  }
+};
+
+static nsRect GetDisplayItemBounds(nsDisplayListBuilder* aBuilder,
+                                   const nsDisplayItem* aItem,
+                                   nsIFrame* aFrame) {
+  // XXX For slightly more accurate region computations we should pixel-snap
+  // this
+  return aFrame->GetContentRectRelativeToSelf() + aItem->ToReferenceFrame();
+}
+
+nsRect nsDisplayPluginReadback::GetBounds(nsDisplayListBuilder* aBuilder,
+                                          bool* aSnap) const {
+  *aSnap = false;
+  return GetDisplayItemBounds(aBuilder, this, mFrame);
+}
+
+nsRect nsDisplayPlugin::GetBounds(nsDisplayListBuilder* aBuilder,
+                                  bool* aSnap) const {
+  *aSnap = true;
+  return GetDisplayItemBounds(aBuilder, this, mFrame);
+}
+
+void nsDisplayPlugin::Paint(nsDisplayListBuilder* aBuilder, gfxContext* aCtx) {
+  nsPluginFrame* f = static_cast<nsPluginFrame*>(mFrame);
+  bool snap;
+  f->PaintPlugin(aBuilder, *aCtx, GetPaintRect(), GetBounds(aBuilder, &snap));
+}
+
+static nsRect GetClippedBoundsIncludingAllScrollClips(
+    nsDisplayItem* aItem, nsDisplayListBuilder* aBuilder) {
+  nsRect r = aItem->GetClippedBounds(aBuilder);
+  for (auto* sc = aItem->GetClipChain(); sc; sc = sc->mParent) {
+    r = sc->mClip.ApplyNonRoundedIntersection(r);
+  }
+  return r;
+}
+
+bool nsDisplayPlugin::ComputeVisibility(nsDisplayListBuilder* aBuilder,
+                                        nsRegion* aVisibleRegion) {
+  if (aBuilder->IsForPluginGeometry()) {
+    nsPluginFrame* f = static_cast<nsPluginFrame*>(mFrame);
+    if (!aBuilder->IsInTransform() || f->IsPaintedByGecko()) {
+      // Since transforms induce reference frames, we don't need to worry
+      // about this method fluffing out due to non-rectilinear transforms.
+      nsRect rAncestor = nsLayoutUtils::TransformFrameRectToAncestor(
+          f, f->GetContentRectRelativeToSelf(), ReferenceFrame());
+      nscoord appUnitsPerDevPixel =
+          ReferenceFrame()->PresContext()->AppUnitsPerDevPixel();
+      f->mNextConfigurationBounds = LayoutDeviceIntRect::FromUnknownRect(
+          rAncestor.ToNearestPixels(appUnitsPerDevPixel));
+
+      nsRegion visibleRegion;
+      // Apply all scroll clips when computing the clipped bounds of this item.
+      // We hide windowed plugins during APZ scrolling, so there never is an
+      // async transform that we need to take into account when clipping.
+      visibleRegion.And(
+          *aVisibleRegion,
+          GetClippedBoundsIncludingAllScrollClips(this, aBuilder));
+      // Make visibleRegion relative to f
+      visibleRegion.MoveBy(-ToReferenceFrame());
+
+      f->mNextConfigurationClipRegion.Clear();
+      for (auto iter = visibleRegion.RectIter(); !iter.Done(); iter.Next()) {
+        nsRect rAncestor = nsLayoutUtils::TransformFrameRectToAncestor(
+            f, iter.Get(), ReferenceFrame());
+        LayoutDeviceIntRect rPixels =
+            LayoutDeviceIntRect::FromUnknownRect(
+                rAncestor.ToNearestPixels(appUnitsPerDevPixel)) -
+            f->mNextConfigurationBounds.TopLeft();
+        if (!rPixels.IsEmpty()) {
+          f->mNextConfigurationClipRegion.AppendElement(rPixels);
+        }
+      }
+    }
+
+    if (f->mInnerView) {
+      // This should produce basically the same rectangle (but not relative
+      // to the root frame). We only call this here for the side-effect of
+      // setting mViewToWidgetOffset on the view.
+      f->mInnerView->CalcWidgetBounds(eWindowType_plugin);
+    }
+  }
+
+  return nsDisplayItem::ComputeVisibility(aBuilder, aVisibleRegion);
+}
+
+nsRegion nsDisplayPlugin::GetOpaqueRegion(nsDisplayListBuilder* aBuilder,
+                                          bool* aSnap) const {
+  *aSnap = false;
+  nsRegion result;
+  nsPluginFrame* f = static_cast<nsPluginFrame*>(mFrame);
+  if (!aBuilder->IsForPluginGeometry()) {
+    nsIWidget* widget = f->GetWidget();
+    if (widget) {
+      // Be conservative and treat plugins with widgets as not opaque,
+      // because that's simple and we might need the content under the widget
+      // if the widget is unexpectedly clipped away. (As can happen when
+      // chrome content over a plugin forces us to clip out the plugin for
+      // security reasons.)
+      // We shouldn't be repainting the content under plugins much anyway
+      // since there generally shouldn't be anything to invalidate or paint
+      // in PaintedLayers there.
+      return result;
+    }
+  }
+
+  if (f->IsOpaque()) {
+    nsRect bounds = GetBounds(aBuilder, aSnap);
+    if (aBuilder->IsForPluginGeometry() ||
+        (f->GetPaintedRect(this) + ToReferenceFrame()).Contains(bounds)) {
+      // We can treat this as opaque
+      result = bounds;
+    }
+  }
+
+  return result;
+}
+
+bool nsDisplayPlugin::CreateWebRenderCommands(
+    mozilla::wr::DisplayListBuilder& aBuilder,
+    mozilla::wr::IpcResourceUpdateQueue& aResources,
+    const StackingContextHelper& aSc,
+    mozilla::layers::RenderRootStateManager* aManager,
+    nsDisplayListBuilder* aDisplayListBuilder) {
+  return static_cast<nsPluginFrame*>(mFrame)->CreateWebRenderCommands(
+      this, aBuilder, aResources, aSc, aManager, aDisplayListBuilder);
+}
+
+nsresult nsPluginFrame::PluginEventNotifier::Run() {
+  nsCOMPtr<nsIObserverService> obsSvc = mozilla::services::GetObserverService();
+  obsSvc->NotifyObservers(nullptr, "plugin-changed-event", mEventType.get());
+  return NS_OK;
+}
+
+void nsPluginFrame::NotifyPluginReflowObservers() {
+  nsContentUtils::AddScriptRunner(new PluginEventNotifier(u"reflow"_ns));
+}
+
+void nsPluginFrame::DidSetWidgetGeometry() {
+#if defined(XP_MACOSX)
+  if (mInstanceOwner && !IsHidden()) {
+    mInstanceOwner->FixUpPluginWindow(
+        nsPluginInstanceOwner::ePluginPaintEnable);
+  }
+#else
+  if (!mWidget && mInstanceOwner) {
+    // UpdateWindowVisibility will notify the plugin of position changes
+    // by updating the NPWindow and calling NPP_SetWindow/AsyncSetWindow.
+    // We treat windowless plugins inside popups as always visible, since
+    // plugins inside popups don't get valid mNextConfigurationBounds
+    // set up.
+    mInstanceOwner->UpdateWindowVisibility(
+        nsLayoutUtils::IsPopup(nsLayoutUtils::GetDisplayRootFrame(this)) ||
+        !mNextConfigurationBounds.IsEmpty());
+  }
+#endif
+}
+
+bool nsPluginFrame::IsOpaque() const {
+#if defined(XP_MACOSX)
+  return false;
+#else
+
+  if (mInstanceOwner && mInstanceOwner->UseAsyncRendering()) {
+    return false;
+  }
+  return !IsTransparentMode();
+#endif
+}
+
+bool nsPluginFrame::IsTransparentMode() const {
+#if defined(XP_MACOSX)
+  return false;
+#else
+  if (!mInstanceOwner) return false;
+
+  NPWindow* window = nullptr;
+  mInstanceOwner->GetWindow(window);
+  if (!window) {
+    return false;
+  }
+
+  if (window->type != NPWindowTypeDrawable) return false;
+
+  RefPtr<nsNPAPIPluginInstance> pi = mInstanceOwner->GetInstance();
+  if (!pi) {
+    return false;
+  }
+
+  bool transparent = false;
+  pi->IsTransparent(&transparent);
+  return transparent;
+#endif
+}
+
+void nsPluginFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
+                                     const nsDisplayListSet& aLists) {
+  // XXX why are we painting collapsed object frames?
+  if (!IsVisibleOrCollapsedForPainting()) return;
+
+  DisplayBorderBackgroundOutline(aBuilder, aLists);
+
+  nsPresContext::nsPresContextType type = PresContext()->Type();
+
+  // If we are painting in Print Preview do nothing....
+  if (type == nsPresContext::eContext_PrintPreview) return;
+
+  DO_GLOBAL_REFLOW_COUNT_DSP("nsPluginFrame");
+
+#ifndef XP_MACOSX
+  if (mWidget && aBuilder->IsInTransform()) {
+    // Windowed plugins should not be rendered inside a transform.
+    return;
+  }
+#endif
+
+  if (aBuilder->IsForPainting() && mInstanceOwner) {
+    // Update plugin frame for both content scaling and full zoom changes.
+    mInstanceOwner->ResolutionMayHaveChanged();
+#ifdef XP_MACOSX
+    mInstanceOwner->WindowFocusMayHaveChanged();
+#endif
+    if (mInstanceOwner->UseAsyncRendering()) {
+      NPWindow* window = nullptr;
+      mInstanceOwner->GetWindow(window);
+      bool isVisible = window && window->width > 0 && window->height > 0;
+      if (isVisible && aBuilder->ShouldSyncDecodeImages()) {
+#ifndef XP_MACOSX
+        mInstanceOwner->UpdateWindowVisibility(true);
+#endif
+      }
+
+      mInstanceOwner->NotifyPaintWaiter(aBuilder);
+    }
+  }
+
+  DisplayListClipState::AutoClipContainingBlockDescendantsToContentBox clip(
+      aBuilder, this);
+
+  // determine if we are printing
+  if (type == nsPresContext::eContext_Print) {
+    aLists.Content()->AppendNewToTop<nsDisplayGeneric>(
+        aBuilder, this, PaintPrintPlugin, "PrintPlugin",
+        DisplayItemType::TYPE_PRINT_PLUGIN);
+  } else {
+    LayerState state = GetLayerState(aBuilder, nullptr);
+    if (state == LayerState::LAYER_INACTIVE &&
+        nsDisplayItem::ForceActiveLayers()) {
+      state = LayerState::LAYER_ACTIVE;
+    }
+    if (aBuilder->IsPaintingToWindow() && state == LayerState::LAYER_ACTIVE &&
+        IsTransparentMode()) {
+      aLists.Content()->AppendNewToTop<nsDisplayPluginReadback>(aBuilder, this);
+    }
+
+    aLists.Content()->AppendNewToTop<nsDisplayPlugin>(aBuilder, this);
+  }
+}
+
+void nsPluginFrame::PrintPlugin(gfxContext& aRenderingContext,
+                                const nsRect& aDirtyRect) {
+  nsCOMPtr<nsIObjectLoadingContent> obj(do_QueryInterface(mContent));
+  if (!obj) return;
+
+  nsIFrame* frame = nullptr;
+  obj->GetPrintFrame(&frame);
+  if (!frame) return;
+
+  nsPresContext* presContext = PresContext();
+  // make sure this is REALLY an nsIObjectFrame
+  // we may need to go through the children to get it
+  nsIObjectFrame* objectFrame = do_QueryFrame(frame);
+  if (!objectFrame) objectFrame = GetNextObjectFrame(presContext, frame);
+  if (!objectFrame) return;
+
+  // finally we can get our plugin instance
+  RefPtr<nsNPAPIPluginInstance> pi = objectFrame->GetPluginInstance();
+  if (!pi) {
+    return;
+  }
+
+  // now we need to setup the correct location for printing
+  NPWindow window;
+  window.window = nullptr;
+
+  // prepare embedded mode printing struct
+  NPPrint npprint;
+  npprint.mode = NP_EMBED;
+
+  // we need to find out if we are windowless or not
+  bool windowless = false;
+  pi->IsWindowless(&windowless);
+  window.type = windowless ? NPWindowTypeDrawable : NPWindowTypeWindow;
+
+  window.clipRect.bottom = 0;
+  window.clipRect.top = 0;
+  window.clipRect.left = 0;
+  window.clipRect.right = 0;
+
+// platform specific printing code
+#if defined(XP_UNIX) || defined(XP_MACOSX)
+  // Doesn't work in a thebes world, or on OS X.
+  (void)window;
+  (void)npprint;
+#elif defined(XP_WIN)
+
+  /* On Windows, we use the win32 printing surface to print.  This, in
+   * turn, uses the Cairo paginated surface, which in turn uses the
+   * meta surface to record all operations and then play them back.
+   * This doesn't work too well for plugins, because if plugins render
+   * directly into the DC, the meta surface won't have any knowledge
+   * of them, and so at the end when it actually does the replay step,
+   * it'll fill the background with white and draw over whatever was
+   * rendered before.
+   *
+   * So, to avoid this, we use PushGroup, which creates a new windows
+   * surface, the plugin renders to that, and then we use normal
+   * cairo methods to composite that in such that it's recorded using the
+   * meta surface.
+   */
+
+  // we'll already be translated into the right spot by gfxWindowsNativeDrawing
+  nsSize contentSize = GetContentRectRelativeToSelf().Size();
+  window.x = 0;
+  window.y = 0;
+  window.width = presContext->AppUnitsToDevPixels(contentSize.width);
+  window.height = presContext->AppUnitsToDevPixels(contentSize.height);
+
+  aRenderingContext.Save();
+
+  // Make sure plugins don't do any damage outside of where they're supposed to
+  aRenderingContext.NewPath();
+  gfxRect r(window.x, window.y, window.width, window.height);
+  aRenderingContext.Rectangle(r);
+  aRenderingContext.Clip();
+
+  gfxWindowsNativeDrawing nativeDraw(&aRenderingContext, r);
+  do {
+    HDC dc = nativeDraw.BeginNativeDrawing();
+    if (!dc) return;
+
+    // XXX don't we need to call nativeDraw.TransformToNativeRect here?
+    npprint.print.embedPrint.platformPrint = dc;
+    npprint.print.embedPrint.window = window;
+    // send off print info to plugin
+    pi->Print(&npprint);
+
+    nativeDraw.EndNativeDrawing();
+  } while (nativeDraw.ShouldRenderAgain());
+  nativeDraw.PaintToContext();
+
+  aRenderingContext.Restore();
+#endif
+
+  // XXX Nav 4.x always sent a SetWindow call after print. Should we do the
+  // same?
+  // XXX Calling DidReflow here makes no sense!!!
+  frame->DidReflow(presContext, nullptr);  // DidReflow will take care of it
+}
+
+nsRect nsPluginFrame::GetPaintedRect(const nsDisplayPlugin* aItem) const {
+  if (!mInstanceOwner) return nsRect();
+  nsRect r = GetContentRectRelativeToSelf();
+  if (!mInstanceOwner->UseAsyncRendering()) return r;
+
+  nsIntSize size = mInstanceOwner->GetCurrentImageSize();
+  nsPresContext* pc = PresContext();
+  r.IntersectRect(r, nsRect(0, 0, pc->DevPixelsToAppUnits(size.width),
+                            pc->DevPixelsToAppUnits(size.height)));
+  return r;
+}
+
+LayerState nsPluginFrame::GetLayerState(nsDisplayListBuilder* aBuilder,
+                                        LayerManager* aManager) {
+  if (!mInstanceOwner) return LayerState::LAYER_NONE;
+
+  if (mInstanceOwner->NeedsScrollImageLayer()) {
+    return LayerState::LAYER_ACTIVE;
+  }
+
+  if (!mInstanceOwner->UseAsyncRendering()) {
+    return LayerState::LAYER_NONE;
+  }
+
+  return LayerState::LAYER_ACTIVE_FORCE;
+}
+
+class PluginFrameDidCompositeObserver final : public DidCompositeObserver {
+ public:
+  PluginFrameDidCompositeObserver(nsPluginInstanceOwner* aOwner,
+                                  LayerManager* aLayerManager)
+      : mInstanceOwner(aOwner), mLayerManager(aLayerManager) {}
+  ~PluginFrameDidCompositeObserver() {
+    mLayerManager->RemoveDidCompositeObserver(this);
+  }
+  void DidComposite() override { mInstanceOwner->DidComposite(); }
+  bool IsValid(LayerManager* aLayerManager) {
+    return aLayerManager == mLayerManager;
+  }
+
+ private:
+  nsPluginInstanceOwner* mInstanceOwner;
+  RefPtr<LayerManager> mLayerManager;
+};
+
+bool nsPluginFrame::GetBounds(nsDisplayItem* aItem, IntSize& aSize,
+                              gfxRect& aRect) {
+  if (!mInstanceOwner) return false;
+
+  NPWindow* window = nullptr;
+  mInstanceOwner->GetWindow(window);
+  if (!window) return false;
+
+  if (window->width <= 0 || window->height <= 0) return false;
+
+#if defined(XP_MACOSX)
+  // window is in "display pixels", but size needs to be in device pixels
+  // window must be in "display pixels"
+  double scaleFactor = 1.0;
+  if (NS_FAILED(mInstanceOwner->GetContentsScaleFactor(&scaleFactor))) {
+    scaleFactor = 1.0;
+  }
+
+  size_t intScaleFactor = ceil(scaleFactor);
+#else
+  size_t intScaleFactor = 1;
+#endif
+
+  aSize =
+      IntSize(window->width * intScaleFactor, window->height * intScaleFactor);
+
+  nsRect area = GetContentRectRelativeToSelf() + aItem->ToReferenceFrame();
+  aRect =
+      nsLayoutUtils::RectToGfxRect(area, PresContext()->AppUnitsPerDevPixel());
+  // to provide crisper and faster drawing.
+  aRect.Round();
+
+  return true;
+}
+
+bool nsPluginFrame::CreateWebRenderCommands(
+    nsDisplayItem* aItem, mozilla::wr::DisplayListBuilder& aBuilder,
+    mozilla::wr::IpcResourceUpdateQueue& aResources,
+    const StackingContextHelper& aSc,
+    mozilla::layers::RenderRootStateManager* aManager,
+    nsDisplayListBuilder* aDisplayListBuilder) {
+  IntSize size;
+  gfxRect r;
+  if (!GetBounds(aItem, size, r)) {
+    return true;
+  }
+
+  RefPtr<ImageContainer> container;
+  // Image for Windowed plugins that support window capturing for scroll
+  // operations or async windowless rendering.
+  container = mInstanceOwner->GetImageContainer();
+  if (!container) {
+    // This can occur if our instance is gone or if the current plugin
+    // configuration does not require a backing image layer.
+    return true;
+  }
+
+#ifdef XP_MACOSX
+  if (!mInstanceOwner->UseAsyncRendering()) {
+    mInstanceOwner->DoCocoaEventDrawRect(r, nullptr);
+  }
+#endif
+
+  RefPtr<LayerManager> lm = aDisplayListBuilder->GetWidgetLayerManager();
+  if (!mDidCompositeObserver || !mDidCompositeObserver->IsValid(lm)) {
+    mDidCompositeObserver =
+        MakeUnique<PluginFrameDidCompositeObserver>(mInstanceOwner, lm);
+  }
+  lm->AddDidCompositeObserver(mDidCompositeObserver.get());
+
+  // If the image container is empty, we don't want to fallback. Any other
+  // failure will be due to resource constraints and fallback is unlikely to
+  // help us. Hence we can ignore the return value from PushImage.
+  LayoutDeviceRect dest(r.x, r.y, size.width, size.height);
+  aManager->CommandBuilder().PushImage(aItem, container, aBuilder, aResources,
+                                       aSc, dest, dest);
+  return true;
+}
+
+already_AddRefed<Layer> nsPluginFrame::BuildLayer(
+    nsDisplayListBuilder* aBuilder, LayerManager* aManager,
+    nsDisplayItem* aItem,
+    const ContainerLayerParameters& aContainerParameters) {
+  IntSize size;
+  gfxRect r;
+  if (!GetBounds(aItem, size, r)) {
+    return nullptr;
+  }
+
+  RefPtr<Layer> layer =
+      (aManager->GetLayerBuilder()->GetLeafLayerFor(aBuilder, aItem));
+
+  if (aItem->GetType() == DisplayItemType::TYPE_PLUGIN) {
+    RefPtr<ImageContainer> container;
+    // Image for Windowed plugins that support window capturing for scroll
+    // operations or async windowless rendering.
+    container = mInstanceOwner->GetImageContainer();
+    if (!container) {
+      // This can occur if our instance is gone or if the current plugin
+      // configuration does not require a backing image layer.
+      return nullptr;
+    }
+
+    if (!layer) {
+      mInstanceOwner->NotifyPaintWaiter(aBuilder);
+      // Initialize ImageLayer
+      layer = aManager->CreateImageLayer();
+      if (!layer) return nullptr;
+    }
+
+    NS_ASSERTION(layer->GetType() == Layer::TYPE_IMAGE, "Bad layer type");
+    ImageLayer* imglayer = static_cast<ImageLayer*>(layer.get());
+#ifdef XP_MACOSX
+    if (!mInstanceOwner->UseAsyncRendering()) {
+      mInstanceOwner->DoCocoaEventDrawRect(r, nullptr);
+    }
+#endif
+
+    imglayer->SetScaleToSize(size, ScaleMode::STRETCH);
+    imglayer->SetContainer(container);
+    SamplingFilter samplingFilter =
+        nsLayoutUtils::GetSamplingFilterForFrame(this);
+#ifdef MOZ_GFX_OPTIMIZE_MOBILE
+    if (!aManager->IsCompositingCheap()) {
+      // Pixman just horrible with bilinear filter scaling
+      samplingFilter = SamplingFilter::POINT;
+    }
+#endif
+    imglayer->SetSamplingFilter(samplingFilter);
+
+    layer->SetContentFlags(IsOpaque() ? Layer::CONTENT_OPAQUE : 0);
+
+    if (aBuilder->IsPaintingToWindow() && aBuilder->GetWidgetLayerManager() &&
+        (aBuilder->GetWidgetLayerManager()->GetBackendType() ==
+             LayersBackend::LAYERS_CLIENT ||
+         aBuilder->GetWidgetLayerManager()->GetBackendType() ==
+             LayersBackend::LAYERS_WR) &&
+        mInstanceOwner->UseAsyncRendering()) {
+      RefPtr<LayerManager> lm = aBuilder->GetWidgetLayerManager();
+      if (!mDidCompositeObserver || !mDidCompositeObserver->IsValid(lm)) {
+        mDidCompositeObserver =
+            MakeUnique<PluginFrameDidCompositeObserver>(mInstanceOwner, lm);
+      }
+      lm->AddDidCompositeObserver(mDidCompositeObserver.get());
+    }
+  } else {
+    NS_ASSERTION(aItem->GetType() == DisplayItemType::TYPE_PLUGIN_READBACK,
+                 "Unknown item type");
+    MOZ_ASSERT(!IsOpaque(), "Opaque plugins don't use backgrounds");
+
+    if (!layer) {
+      layer = aManager->CreateReadbackLayer();
+      if (!layer) return nullptr;
+    }
+    NS_ASSERTION(layer->GetType() == Layer::TYPE_READBACK, "Bad layer type");
+
+    ReadbackLayer* readback = static_cast<ReadbackLayer*>(layer.get());
+    if (readback->GetSize() != size) {
+      // This will destroy any old background sink and notify us that the
+      // background is now unknown
+      readback->SetSink(nullptr);
+      readback->SetSize(size);
+
+      if (mBackgroundSink) {
+        // Maybe we still have a background sink associated with another
+        // readback layer that wasn't recycled for some reason? Unhook it
+        // now so that if this frame goes away, it doesn't have a dangling
+        // reference to us.
+        mBackgroundSink->Destroy();
+      }
+      mBackgroundSink =
+          new PluginBackgroundSink(this, readback->AllocateSequenceNumber());
+      readback->SetSink(mBackgroundSink);
+      // The layer has taken ownership of our sink. When either the sink dies
+      // or the frame dies, the connection from the surviving object is nulled
+      // out.
+    }
+  }
+
+  // Set a transform on the layer to draw the plugin in the right place
+  gfxPoint p = r.TopLeft() + aContainerParameters.mOffset;
+  Matrix transform = Matrix::Translation(p.x, p.y);
+
+  layer->SetBaseTransform(Matrix4x4::From2D(transform));
+  return layer.forget();
+}
+
+void nsPluginFrame::PaintPlugin(nsDisplayListBuilder* aBuilder,
+                                gfxContext& aRenderingContext,
+                                const nsRect& aDirtyRect,
+                                const nsRect& aPluginRect) {
+#if defined(DEBUG)
+  // On Desktop, we should have built a layer as we no longer support in-process
+  // plugins or synchronous painting. We can only get here for windowed plugins
+  // (which draw themselves), or via some error/unload state.
+  if (mInstanceOwner) {
+    NPWindow* window = nullptr;
+    mInstanceOwner->GetWindow(window);
+    MOZ_ASSERT(!window || window->type == NPWindowTypeWindow);
+  }
+#endif
+}
+
+nsresult nsPluginFrame::HandleEvent(nsPresContext* aPresContext,
+                                    WidgetGUIEvent* anEvent,
+                                    nsEventStatus* anEventStatus) {
+  NS_ENSURE_ARG_POINTER(anEvent);
+  NS_ENSURE_ARG_POINTER(anEventStatus);
+  nsresult rv = NS_OK;
+
+  if (!mInstanceOwner) return NS_ERROR_NULL_POINTER;
+
+  mInstanceOwner->ConsiderNewEventloopNestingLevel();
+
+  if (anEvent->mMessage == ePluginActivate) {
+    if (RefPtr<nsFocusManager> fm = nsFocusManager::GetFocusManager()) {
+      RefPtr<dom::Element> elem = GetContent()->AsElement();
+      return fm->SetFocus(elem, 0);
+    }
+  } else if (anEvent->mMessage == ePluginFocus) {
+    if (RefPtr<nsFocusManager> fm = nsFocusManager::GetFocusManager()) {
+      RefPtr<dom::Element> elem = GetContent()->AsElement();
+      return fm->FocusPlugin(elem);
+    }
+  }
+
+#ifdef XP_WIN
+  rv = nsIFrame::HandleEvent(aPresContext, anEvent, anEventStatus);
+  return rv;
+#endif
+
+#ifdef XP_MACOSX
+  // we want to process some native mouse events in the cocoa event model
+  if ((anEvent->mMessage == eMouseEnterIntoWidget ||
+       anEvent->mMessage == eWheel) &&
+      mInstanceOwner->GetEventModel() == NPEventModelCocoa) {
+    *anEventStatus = mInstanceOwner->ProcessEvent(*anEvent);
+    // Due to plugin code reentering Gecko, this frame may be dead at this
+    // point.
+    return rv;
+  }
+
+  // These two calls to PresShell::SetCapturingContent() (on mouse-down
+  // and mouse-up) are needed to make the routing of mouse events while
+  // dragging conform to standard OS X practice, and to the Cocoa NPAPI spec.
+  // See bug 525078 and bug 909678.
+  if (anEvent->mMessage == eMouseDown) {
+    PresShell::SetCapturingContent(GetContent(),
+                                   CaptureFlags::IgnoreAllowedState);
+  }
+#endif
+
+  rv = nsIFrame::HandleEvent(aPresContext, anEvent, anEventStatus);
+
+  // We need to be careful from this point because the call to
+  // nsIFrame::HandleEvent() might have killed us.
+
+#ifdef XP_MACOSX
+  if (anEvent->mMessage == eMouseUp) {
+    PresShell::ReleaseCapturingContent();
+  }
+#endif
+
+  return rv;
+}
+
+void nsPluginFrame::HandleWheelEventAsDefaultAction(
+    WidgetWheelEvent* aWheelEvent) {
+  MOZ_ASSERT(WantsToHandleWheelEventAsDefaultAction());
+  MOZ_ASSERT(!aWheelEvent->DefaultPrevented());
+
+  if (NS_WARN_IF(!mInstanceOwner) ||
+      NS_WARN_IF(aWheelEvent->mMessage != eWheel)) {
+    return;
+  }
+
+  // If the wheel event has native message, it should may be handled by
+  // HandleEvent() in the future.  In such case, we should do nothing here.
+  if (NS_WARN_IF(!!aWheelEvent->mPluginEvent)) {
+    return;
+  }
+
+  mInstanceOwner->ProcessEvent(*aWheelEvent);
+  // We need to assume that the event is always consumed/handled by the
+  // plugin.  There is no way to know if it's actually consumed/handled.
+  aWheelEvent->mViewPortIsOverscrolled = false;
+  aWheelEvent->mOverflowDeltaX = 0;
+  aWheelEvent->mOverflowDeltaY = 0;
+  // Consume the event explicitly.
+  aWheelEvent->PreventDefault();
+}
+
+bool nsPluginFrame::WantsToHandleWheelEventAsDefaultAction() const {
+#ifdef XP_WIN
+  if (!mInstanceOwner) {
+    return false;
+  }
+  NPWindow* window = nullptr;
+  mInstanceOwner->GetWindow(window);
+  // On Windows, only when the plugin is windowless, we need to send wheel
+  // events as default action.
+  return window->type == NPWindowTypeDrawable;
+#else
+  return false;
+#endif
+}
+
+nsNPAPIPluginInstance* nsPluginFrame::GetPluginInstance() {
+  if (!mInstanceOwner) {
+    return nullptr;
+  }
+
+  return mInstanceOwner->GetInstance();
+}
+
+Maybe<nsIFrame::Cursor> nsPluginFrame::GetCursor(const nsPoint& aPoint) {
+  if (!mInstanceOwner) {
+    return Nothing();
+  }
+
+  RefPtr<nsNPAPIPluginInstance> inst = mInstanceOwner->GetInstance();
+  if (!inst) {
+    return Nothing();
+  }
+
+  bool useDOMCursor =
+      static_cast<nsNPAPIPluginInstance*>(inst.get())->UsesDOMForCursor();
+  if (!useDOMCursor) {
+    return Nothing();
+  }
+
+  return nsIFrame::GetCursor(aPoint);
+}
+
+void nsPluginFrame::SetIsDocumentActive(bool aIsActive) {
+  if (mInstanceOwner) {
+    mInstanceOwner->UpdateDocumentActiveState(aIsActive);
+  }
+}
+
+// static
+nsIObjectFrame* nsPluginFrame::GetNextObjectFrame(nsPresContext* aPresContext,
+                                                  nsIFrame* aRoot) {
+  for (nsIFrame* child : aRoot->PrincipalChildList()) {
+    nsIObjectFrame* outFrame = do_QueryFrame(child);
+    if (outFrame) {
+      if (outFrame->GetPluginInstance()) {  // make sure we have a REAL plugin
+        return outFrame;
+      }
+    }
+
+    outFrame = GetNextObjectFrame(aPresContext, child);
+    if (outFrame) return outFrame;
+  }
+
+  return nullptr;
+}
+
+/*static*/
+void nsPluginFrame::BeginSwapDocShells(nsISupports* aSupports) {
+  MOZ_ASSERT(aSupports, "null parameter");
+  nsCOMPtr<nsIContent> content(do_QueryInterface(aSupports));
+  if (!content) {
+    return;
+  }
+
+  // This function is called from a document content enumerator so we need
+  // to filter out the nsPluginFrames and ignore the rest.
+  nsIObjectFrame* obj = do_QueryFrame(content->GetPrimaryFrame());
+  if (!obj) return;
+
+  nsPluginFrame* objectFrame = static_cast<nsPluginFrame*>(obj);
+  NS_ASSERTION(!objectFrame->mWidget || objectFrame->mWidget->GetParent(),
+               "Plugin windows must not be toplevel");
+  objectFrame->UnregisterPluginForGeometryUpdates();
+}
+
+/*static*/
+void nsPluginFrame::EndSwapDocShells(nsISupports* aSupports) {
+  MOZ_ASSERT(aSupports, "null parameter");
+  nsCOMPtr<nsIContent> content(do_QueryInterface(aSupports));
+  if (!content) {
+    return;
+  }
+
+  // This function is called from a document content enumerator so we need
+  // to filter out the nsPluginFrames and ignore the rest.
+  nsIObjectFrame* obj = do_QueryFrame(content->GetPrimaryFrame());
+  if (!obj) return;
+
+  nsPluginFrame* objectFrame = static_cast<nsPluginFrame*>(obj);
+  nsRootPresContext* rootPC = objectFrame->PresContext()->GetRootPresContext();
+  NS_ASSERTION(rootPC, "unable to register the plugin frame");
+  nsIWidget* widget = objectFrame->mWidget;
+  if (widget) {
+    // Reparent the widget.
+    nsIWidget* parent = rootPC->PresShell()->GetRootFrame()->GetNearestWidget();
+    widget->SetParent(parent);
+    AutoWeakFrame weakFrame(objectFrame);
+    objectFrame->CallSetWindow();
+    if (!weakFrame.IsAlive()) {
+      return;
+    }
+  }
+
+  if (objectFrame->mInstanceOwner) {
+    objectFrame->RegisterPluginForGeometryUpdates();
+  }
+}
+
+nsIFrame* NS_NewObjectFrame(PresShell* aPresShell, ComputedStyle* aStyle) {
+  return new (aPresShell) nsPluginFrame(aStyle, aPresShell->GetPresContext());
+}
+
+bool nsPluginFrame::IsPaintedByGecko() const {
+#ifdef XP_MACOSX
+  return true;
+#else
+  return !mWidget;
+#endif
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsPluginFrame)