Adding upstream version 124.0.1.upstream/124.0.1

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

1 files changed, 741 insertions, 0 deletions

diff --git a/layout/generic/nsVideoFrame.cpp b/layout/generic/nsVideoFrame.cpp
new file mode 100644
index 0000000000..d5bcc45969
--- /dev/null
+++ b/layout/generic/nsVideoFrame.cpp
@@ -0,0 +1,741 @@
+/* -*- 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 object for the HTML <video> element */
+
+#include "nsVideoFrame.h"
+
+#include "nsCOMPtr.h"
+#include "nsGkAtoms.h"
+
+#include "mozilla/PresShell.h"
+#include "mozilla/dom/HTMLImageElement.h"
+#include "mozilla/dom/HTMLVideoElement.h"
+#include "mozilla/dom/ShadowRoot.h"
+#include "mozilla/layers/RenderRootStateManager.h"
+#include "nsDisplayList.h"
+#include "nsGenericHTMLElement.h"
+#include "nsPresContext.h"
+#include "nsContentCreatorFunctions.h"
+#include "nsIContentInlines.h"
+#include "nsImageFrame.h"
+#include "nsIImageLoadingContent.h"
+#include "nsContentUtils.h"
+#include "nsLayoutUtils.h"
+#include "ImageContainer.h"
+#include "nsStyleUtil.h"
+#include <algorithm>
+
+using namespace mozilla;
+using namespace mozilla::layers;
+using namespace mozilla::dom;
+using namespace mozilla::gfx;
+
+nsIFrame* NS_NewHTMLVideoFrame(PresShell* aPresShell, ComputedStyle* aStyle) {
+  return new (aPresShell) nsVideoFrame(aStyle, aPresShell->GetPresContext());
+}
+
+nsIFrame* NS_NewHTMLAudioFrame(PresShell* aPresShell, ComputedStyle* aStyle) {
+  return new (aPresShell) nsAudioFrame(aStyle, aPresShell->GetPresContext());
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsVideoFrame)
+NS_QUERYFRAME_HEAD(nsVideoFrame)
+  NS_QUERYFRAME_ENTRY(nsVideoFrame)
+  NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
+NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
+
+NS_IMPL_FRAMEARENA_HELPERS(nsAudioFrame)
+NS_QUERYFRAME_HEAD(nsAudioFrame)
+  NS_QUERYFRAME_ENTRY(nsAudioFrame)
+NS_QUERYFRAME_TAIL_INHERITING(nsVideoFrame)
+
+// A matrix to obtain a correct-rotated video frame.
+static Matrix ComputeRotationMatrix(gfxFloat aRotatedWidth,
+                                    gfxFloat aRotatedHeight,
+                                    VideoRotation aDegrees) {
+  Matrix shiftVideoCenterToOrigin;
+  if (aDegrees == VideoRotation::kDegree_90 ||
+      aDegrees == VideoRotation::kDegree_270) {
+    shiftVideoCenterToOrigin =
+        Matrix::Translation(-aRotatedHeight / 2.0, -aRotatedWidth / 2.0);
+  } else {
+    shiftVideoCenterToOrigin =
+        Matrix::Translation(-aRotatedWidth / 2.0, -aRotatedHeight / 2.0);
+  }
+
+  auto angle = static_cast<double>(aDegrees) / 180.0 * M_PI;
+  Matrix rotation = Matrix::Rotation(static_cast<gfx::Float>(angle));
+  Matrix shiftLeftTopToOrigin =
+      Matrix::Translation(aRotatedWidth / 2.0, aRotatedHeight / 2.0);
+  return shiftVideoCenterToOrigin * rotation * shiftLeftTopToOrigin;
+}
+
+static void SwapScaleWidthHeightForRotation(IntSize& aSize,
+                                            VideoRotation aDegrees) {
+  if (aDegrees == VideoRotation::kDegree_90 ||
+      aDegrees == VideoRotation::kDegree_270) {
+    int32_t tmpWidth = aSize.width;
+    aSize.width = aSize.height;
+    aSize.height = tmpWidth;
+  }
+}
+
+nsVideoFrame::nsVideoFrame(ComputedStyle* aStyle, nsPresContext* aPc,
+                           ClassID aClassID)
+    : nsContainerFrame(aStyle, aPc, aClassID),
+      mIsAudio(aClassID == nsAudioFrame::kClassID) {
+  EnableVisibilityTracking();
+}
+
+nsVideoFrame::~nsVideoFrame() = default;
+
+nsAudioFrame::nsAudioFrame(ComputedStyle* aStyle, nsPresContext* aPc)
+    : nsVideoFrame(aStyle, aPc, kClassID) {}
+
+nsAudioFrame::~nsAudioFrame() = default;
+
+nsresult nsVideoFrame::CreateAnonymousContent(
+    nsTArray<ContentInfo>& aElements) {
+  nsNodeInfoManager* nodeInfoManager =
+      GetContent()->GetComposedDoc()->NodeInfoManager();
+  RefPtr<NodeInfo> nodeInfo;
+
+  if (HasVideoElement()) {
+    // Create an anonymous image element as a child to hold the poster
+    // image. We may not have a poster image now, but one could be added
+    // before we load, or on a subsequent load.
+    nodeInfo = nodeInfoManager->GetNodeInfo(
+        nsGkAtoms::img, nullptr, kNameSpaceID_XHTML, nsINode::ELEMENT_NODE);
+    NS_ENSURE_TRUE(nodeInfo, NS_ERROR_OUT_OF_MEMORY);
+    mPosterImage = NS_NewHTMLImageElement(nodeInfo.forget());
+    NS_ENSURE_TRUE(mPosterImage, NS_ERROR_OUT_OF_MEMORY);
+    UpdatePosterSource(false);
+
+    // XXX(Bug 1631371) Check if this should use a fallible operation as it
+    // pretended earlier.
+    aElements.AppendElement(mPosterImage);
+
+    // Set up the caption overlay div for showing any TextTrack data
+    nodeInfo = nodeInfoManager->GetNodeInfo(
+        nsGkAtoms::div, nullptr, kNameSpaceID_XHTML, nsINode::ELEMENT_NODE);
+    NS_ENSURE_TRUE(nodeInfo, NS_ERROR_OUT_OF_MEMORY);
+    mCaptionDiv = NS_NewHTMLDivElement(nodeInfo.forget());
+    NS_ENSURE_TRUE(mCaptionDiv, NS_ERROR_OUT_OF_MEMORY);
+    nsGenericHTMLElement* div =
+        static_cast<nsGenericHTMLElement*>(mCaptionDiv.get());
+    div->SetClassName(u"caption-box"_ns);
+
+    // XXX(Bug 1631371) Check if this should use a fallible operation as it
+    // pretended earlier.
+    aElements.AppendElement(mCaptionDiv);
+    UpdateTextTrack();
+  }
+
+  return NS_OK;
+}
+
+void nsVideoFrame::AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
+                                            uint32_t aFliter) {
+  if (mPosterImage) {
+    aElements.AppendElement(mPosterImage);
+  }
+
+  if (mCaptionDiv) {
+    aElements.AppendElement(mCaptionDiv);
+  }
+}
+
+nsIContent* nsVideoFrame::GetVideoControls() const {
+  if (!mContent->GetShadowRoot()) {
+    return nullptr;
+  }
+
+  // The video controls <div> is the only child of the UA Widget Shadow Root
+  // if it is present. It is only lazily inserted into the DOM when
+  // the controls attribute is set.
+  MOZ_ASSERT(mContent->GetShadowRoot()->IsUAWidget());
+  MOZ_ASSERT(1 >= mContent->GetShadowRoot()->GetChildCount());
+  return mContent->GetShadowRoot()->GetFirstChild();
+}
+
+void nsVideoFrame::Destroy(DestroyContext& aContext) {
+  if (mReflowCallbackPosted) {
+    PresShell()->CancelReflowCallback(this);
+  }
+  aContext.AddAnonymousContent(mCaptionDiv.forget());
+  aContext.AddAnonymousContent(mPosterImage.forget());
+  nsContainerFrame::Destroy(aContext);
+}
+
+class DispatchResizeEvent : public Runnable {
+ public:
+  explicit DispatchResizeEvent(nsIContent* aContent,
+                               const nsLiteralString& aName)
+      : Runnable("DispatchResizeEvent"), mContent(aContent), mName(aName) {}
+  NS_IMETHOD Run() override {
+    nsContentUtils::DispatchTrustedEvent(mContent->OwnerDoc(), mContent, mName,
+                                         CanBubble::eNo, Cancelable::eNo);
+    return NS_OK;
+  }
+  nsCOMPtr<nsIContent> mContent;
+  const nsLiteralString mName;
+};
+
+bool nsVideoFrame::ReflowFinished() {
+  mReflowCallbackPosted = false;
+  auto GetSize = [&](nsIContent* aContent) -> Maybe<nsSize> {
+    if (!aContent) {
+      return Nothing();
+    }
+    nsIFrame* f = aContent->GetPrimaryFrame();
+    if (!f) {
+      return Nothing();
+    }
+    return Some(f->GetSize());
+  };
+
+  AutoTArray<nsCOMPtr<nsIRunnable>, 2> events;
+
+  if (auto size = GetSize(mCaptionDiv)) {
+    if (*size != mCaptionTrackedSize) {
+      mCaptionTrackedSize = *size;
+      events.AppendElement(
+          new DispatchResizeEvent(mCaptionDiv, u"resizecaption"_ns));
+    }
+  }
+  nsIContent* controls = GetVideoControls();
+  if (auto size = GetSize(controls)) {
+    if (*size != mControlsTrackedSize) {
+      mControlsTrackedSize = *size;
+      events.AppendElement(
+          new DispatchResizeEvent(controls, u"resizevideocontrols"_ns));
+    }
+  }
+  for (auto& event : events) {
+    nsContentUtils::AddScriptRunner(event.forget());
+  }
+  return false;
+}
+
+void nsVideoFrame::Reflow(nsPresContext* aPresContext, ReflowOutput& aMetrics,
+                          const ReflowInput& aReflowInput,
+                          nsReflowStatus& aStatus) {
+  MarkInReflow();
+  DO_GLOBAL_REFLOW_COUNT("nsVideoFrame");
+  DISPLAY_REFLOW(aPresContext, this, aReflowInput, aMetrics, aStatus);
+  MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
+  NS_FRAME_TRACE(
+      NS_FRAME_TRACE_CALLS,
+      ("enter nsVideoFrame::Reflow: availSize=%d,%d",
+       aReflowInput.AvailableISize(), aReflowInput.AvailableBSize()));
+
+  MOZ_ASSERT(HasAnyStateBits(NS_FRAME_IN_REFLOW), "frame is not in reflow");
+
+  const WritingMode myWM = aReflowInput.GetWritingMode();
+  nscoord contentBoxBSize = aReflowInput.ComputedBSize();
+  const auto logicalBP = aReflowInput.ComputedLogicalBorderPadding(myWM);
+  const nscoord borderBoxISize =
+      aReflowInput.ComputedISize() + logicalBP.IStartEnd(myWM);
+  const bool isBSizeShrinkWrapping = (contentBoxBSize == NS_UNCONSTRAINEDSIZE);
+
+  nscoord borderBoxBSize;
+  if (!isBSizeShrinkWrapping) {
+    borderBoxBSize = contentBoxBSize + logicalBP.BStartEnd(myWM);
+  }
+
+  nsIContent* videoControlsDiv = GetVideoControls();
+
+  // Reflow the child frames. We may have up to three: an image
+  // frame (for the poster image), a container frame for the controls,
+  // and a container frame for the caption.
+  for (nsIFrame* child : mFrames) {
+    nsSize oldChildSize = child->GetSize();
+    nsReflowStatus childStatus;
+    const WritingMode childWM = child->GetWritingMode();
+    LogicalSize availableSize = aReflowInput.ComputedSize(childWM);
+    availableSize.BSize(childWM) = NS_UNCONSTRAINEDSIZE;
+    ReflowInput kidReflowInput(aPresContext, aReflowInput, child,
+                               availableSize);
+    ReflowOutput kidDesiredSize(myWM);
+    const nsSize containerSize =
+        aReflowInput.ComputedSizeAsContainerIfConstrained();
+
+    if (child->GetContent() == mPosterImage) {
+      // Reflow the poster frame.
+      const LogicalPoint childOrigin = logicalBP.StartOffset(myWM);
+      const LogicalSize posterRenderSize = aReflowInput.ComputedSize(childWM);
+      kidReflowInput.SetComputedISize(posterRenderSize.ISize(childWM));
+      kidReflowInput.SetComputedBSize(posterRenderSize.BSize(childWM));
+
+      ReflowChild(child, aPresContext, kidDesiredSize, kidReflowInput, myWM,
+                  childOrigin, containerSize, ReflowChildFlags::Default,
+                  childStatus);
+      MOZ_ASSERT(childStatus.IsFullyComplete(),
+                 "We gave our child unconstrained available block-size, "
+                 "so it should be complete!");
+
+      FinishReflowChild(child, aPresContext, kidDesiredSize, &kidReflowInput,
+                        myWM, childOrigin, containerSize,
+                        ReflowChildFlags::Default);
+
+    } else if (child->GetContent() == mCaptionDiv ||
+               child->GetContent() == videoControlsDiv) {
+      // Reflow the caption and control bar frames.
+      const LogicalPoint childOrigin = logicalBP.StartOffset(myWM);
+      ReflowChild(child, aPresContext, kidDesiredSize, kidReflowInput, myWM,
+                  childOrigin, containerSize, ReflowChildFlags::Default,
+                  childStatus);
+      MOZ_ASSERT(childStatus.IsFullyComplete(),
+                 "We gave our child unconstrained available block-size, "
+                 "so it should be complete!");
+
+      if (child->GetContent() == videoControlsDiv && isBSizeShrinkWrapping) {
+        // Resolve our own BSize based on the controls' size in the
+        // same axis. Unless we're size-contained, in which case we
+        // have to behave as if we have an intrinsic size of 0.
+        if (GetContainSizeAxes().mBContained) {
+          contentBoxBSize = 0;
+        } else {
+          contentBoxBSize = kidDesiredSize.BSize(myWM);
+        }
+      }
+
+      FinishReflowChild(child, aPresContext, kidDesiredSize, &kidReflowInput,
+                        myWM, childOrigin, containerSize,
+                        ReflowChildFlags::Default);
+
+      if (child->GetSize() != oldChildSize) {
+        // We might find non-primary frames in printing due to
+        // ReplicateFixedFrames, but we don't care about that.
+        MOZ_ASSERT(child->IsPrimaryFrame() ||
+                       PresContext()->IsPrintingOrPrintPreview(),
+                   "We only look at the primary frame in ReflowFinished");
+        if (!mReflowCallbackPosted) {
+          mReflowCallbackPosted = true;
+          PresShell()->PostReflowCallback(this);
+        }
+      }
+    } else {
+      NS_ERROR("Unexpected extra child frame in nsVideoFrame; skipping");
+    }
+  }
+
+  if (isBSizeShrinkWrapping) {
+    if (contentBoxBSize == NS_UNCONSTRAINEDSIZE) {
+      // We didn't get a BSize from our intrinsic size/ratio, nor did we
+      // get one from our controls. Just use BSize of 0.
+      contentBoxBSize = 0;
+    }
+    contentBoxBSize = aReflowInput.ApplyMinMaxBSize(contentBoxBSize);
+    borderBoxBSize = contentBoxBSize + logicalBP.BStartEnd(myWM);
+  }
+
+  LogicalSize logicalDesiredSize(myWM, borderBoxISize, borderBoxBSize);
+  aMetrics.SetSize(myWM, logicalDesiredSize);
+
+  aMetrics.SetOverflowAreasToDesiredBounds();
+
+  FinishAndStoreOverflow(&aMetrics);
+
+  NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS, ("exit nsVideoFrame::Reflow: size=%d,%d",
+                                        aMetrics.Width(), aMetrics.Height()));
+
+  MOZ_ASSERT(aStatus.IsEmpty(), "This type of frame can't be split.");
+}
+
+#ifdef ACCESSIBILITY
+a11y::AccType nsVideoFrame::AccessibleType() { return a11y::eHTMLMediaType; }
+#endif
+
+#ifdef DEBUG_FRAME_DUMP
+nsresult nsVideoFrame::GetFrameName(nsAString& aResult) const {
+  return MakeFrameName(u"HTMLVideo"_ns, aResult);
+}
+#endif
+
+nsIFrame::SizeComputationResult nsVideoFrame::ComputeSize(
+    gfxContext* aRenderingContext, WritingMode aWM, const LogicalSize& aCBSize,
+    nscoord aAvailableISize, const LogicalSize& aMargin,
+    const LogicalSize& aBorderPadding, const StyleSizeOverrides& aSizeOverrides,
+    ComputeSizeFlags aFlags) {
+  if (!HasVideoElement()) {
+    return nsContainerFrame::ComputeSize(
+        aRenderingContext, aWM, aCBSize, aAvailableISize, aMargin,
+        aBorderPadding, aSizeOverrides, aFlags);
+  }
+
+  return {ComputeSizeWithIntrinsicDimensions(
+              aRenderingContext, aWM, GetIntrinsicSize(), GetAspectRatio(),
+              aCBSize, aMargin, aBorderPadding, aSizeOverrides, aFlags),
+          AspectRatioUsage::None};
+}
+
+nscoord nsVideoFrame::GetMinISize(gfxContext* aRenderingContext) {
+  nscoord result;
+  // Bind the result variable to a RAII-based debug object - the variable
+  // therefore must match the function's return value.
+  DISPLAY_MIN_INLINE_SIZE(this, result);
+  // This call handles size-containment
+  nsSize size = GetIntrinsicSize().ToSize().valueOr(nsSize());
+  result = GetWritingMode().IsVertical() ? size.height : size.width;
+  return result;
+}
+
+nscoord nsVideoFrame::GetPrefISize(gfxContext* aRenderingContext) {
+  // <audio> / <video> has the same min / pref ISize.
+  return GetMinISize(aRenderingContext);
+}
+
+Maybe<nsSize> nsVideoFrame::PosterImageSize() const {
+  // Use the poster image frame's size.
+  nsIFrame* child = GetPosterImage()->GetPrimaryFrame();
+  return child->GetIntrinsicSize().ToSize();
+}
+
+AspectRatio nsVideoFrame::GetIntrinsicRatio() const {
+  if (!HasVideoElement()) {
+    // Audio elements have no intrinsic ratio.
+    return AspectRatio();
+  }
+
+  // 'contain:[inline-]size' replaced elements have no intrinsic ratio.
+  if (GetContainSizeAxes().IsAny()) {
+    return AspectRatio();
+  }
+
+  auto* element = static_cast<HTMLVideoElement*>(GetContent());
+  if (Maybe<CSSIntSize> size = element->GetVideoSize()) {
+    return AspectRatio::FromSize(*size);
+  }
+
+  if (ShouldDisplayPoster()) {
+    if (Maybe<nsSize> imgSize = PosterImageSize()) {
+      return AspectRatio::FromSize(*imgSize);
+    }
+  }
+
+  if (StylePosition()->mAspectRatio.HasRatio()) {
+    return AspectRatio();
+  }
+
+  return AspectRatio::FromSize(kFallbackIntrinsicSizeInPixels);
+}
+
+bool nsVideoFrame::ShouldDisplayPoster() const {
+  if (!HasVideoElement()) {
+    return false;
+  }
+
+  auto* element = static_cast<HTMLVideoElement*>(GetContent());
+  if (element->GetPlayedOrSeeked() && HasVideoData()) {
+    return false;
+  }
+
+  nsCOMPtr<nsIImageLoadingContent> imgContent = do_QueryInterface(mPosterImage);
+  NS_ENSURE_TRUE(imgContent, false);
+
+  nsCOMPtr<imgIRequest> request;
+  nsresult res = imgContent->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
+                                        getter_AddRefs(request));
+  if (NS_FAILED(res) || !request) {
+    return false;
+  }
+
+  uint32_t status = 0;
+  res = request->GetImageStatus(&status);
+  if (NS_FAILED(res) || (status & imgIRequest::STATUS_ERROR)) {
+    return false;
+  }
+
+  return true;
+}
+
+IntrinsicSize nsVideoFrame::GetIntrinsicSize() {
+  const auto containAxes = GetContainSizeAxes();
+  const auto isVideo = HasVideoElement();
+  // Intrinsic size will be given by contain-intrinsic-size if the element is
+  // size-contained. If both axes have containment, FinishIntrinsicSize() will
+  // ignore the fallback size argument, so we can just pass no intrinsic size,
+  // or whatever.
+  if (containAxes.IsBoth()) {
+    return FinishIntrinsicSize(containAxes, {});
+  }
+
+  if (!isVideo) {
+    // An audio element with no "controls" attribute, distinguished by the last
+    // and only child being the control, falls back to no intrinsic size.
+    if (!mFrames.LastChild()) {
+      return FinishIntrinsicSize(containAxes, {});
+    }
+
+    return FinishIntrinsicSize(containAxes,
+                               IntrinsicSize(kFallbackIntrinsicSize));
+  }
+
+  auto* element = static_cast<HTMLVideoElement*>(GetContent());
+  if (Maybe<CSSIntSize> size = element->GetVideoSize()) {
+    return FinishIntrinsicSize(containAxes,
+                               IntrinsicSize(CSSPixel::ToAppUnits(*size)));
+  }
+
+  if (ShouldDisplayPoster()) {
+    if (Maybe<nsSize> imgSize = PosterImageSize()) {
+      return FinishIntrinsicSize(containAxes, IntrinsicSize(*imgSize));
+    }
+  }
+
+  if (StylePosition()->mAspectRatio.HasRatio()) {
+    return {};
+  }
+
+  return FinishIntrinsicSize(containAxes,
+                             IntrinsicSize(kFallbackIntrinsicSize));
+}
+
+void nsVideoFrame::UpdatePosterSource(bool aNotify) {
+  NS_ASSERTION(HasVideoElement(), "Only call this on <video> elements.");
+  HTMLVideoElement* element = static_cast<HTMLVideoElement*>(GetContent());
+
+  if (element->HasAttr(nsGkAtoms::poster) &&
+      !element->AttrValueIs(kNameSpaceID_None, nsGkAtoms::poster,
+                            nsGkAtoms::_empty, eIgnoreCase)) {
+    nsAutoString posterStr;
+    element->GetPoster(posterStr);
+    mPosterImage->SetAttr(kNameSpaceID_None, nsGkAtoms::src, posterStr,
+                          aNotify);
+  } else {
+    mPosterImage->UnsetAttr(kNameSpaceID_None, nsGkAtoms::src, aNotify);
+  }
+}
+
+nsresult nsVideoFrame::AttributeChanged(int32_t aNameSpaceID,
+                                        nsAtom* aAttribute, int32_t aModType) {
+  if (aAttribute == nsGkAtoms::poster && HasVideoElement()) {
+    UpdatePosterSource(true);
+  }
+  return nsContainerFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
+}
+
+void nsVideoFrame::OnVisibilityChange(
+    Visibility aNewVisibility, const Maybe<OnNonvisible>& aNonvisibleAction) {
+  if (HasVideoElement()) {
+    static_cast<HTMLMediaElement*>(GetContent())
+        ->OnVisibilityChange(aNewVisibility);
+  }
+
+  nsCOMPtr<nsIImageLoadingContent> imageLoader =
+      do_QueryInterface(mPosterImage);
+  if (imageLoader) {
+    imageLoader->OnVisibilityChange(aNewVisibility, aNonvisibleAction);
+  }
+
+  nsContainerFrame::OnVisibilityChange(aNewVisibility, aNonvisibleAction);
+}
+
+bool nsVideoFrame::HasVideoData() const {
+  if (!HasVideoElement()) {
+    return false;
+  }
+  auto* element = static_cast<HTMLVideoElement*>(GetContent());
+  return element->GetVideoSize().isSome();
+}
+
+void nsVideoFrame::UpdateTextTrack() {
+  static_cast<HTMLMediaElement*>(GetContent())->NotifyCueDisplayStatesChanged();
+}
+
+namespace mozilla {
+
+class nsDisplayVideo : public nsPaintedDisplayItem {
+ public:
+  nsDisplayVideo(nsDisplayListBuilder* aBuilder, nsVideoFrame* aFrame)
+      : nsPaintedDisplayItem(aBuilder, aFrame) {
+    MOZ_COUNT_CTOR(nsDisplayVideo);
+  }
+
+  MOZ_COUNTED_DTOR_OVERRIDE(nsDisplayVideo)
+
+  NS_DISPLAY_DECL_NAME("Video", TYPE_VIDEO)
+
+  already_AddRefed<ImageContainer> GetImageContainer(gfxRect& aDestGFXRect) {
+    nsRect area = Frame()->GetContentRectRelativeToSelf() + ToReferenceFrame();
+    HTMLVideoElement* element =
+        static_cast<HTMLVideoElement*>(Frame()->GetContent());
+
+    Maybe<CSSIntSize> videoSizeInPx = element->GetVideoSize();
+    if (videoSizeInPx.isNothing() || area.IsEmpty()) {
+      return nullptr;
+    }
+
+    RefPtr<ImageContainer> container = element->GetImageContainer();
+    if (!container) {
+      return nullptr;
+    }
+
+    // Retrieve the size of the decoded video frame, before being scaled
+    // by pixel aspect ratio.
+    mozilla::gfx::IntSize frameSize = container->GetCurrentSize();
+    if (frameSize.width == 0 || frameSize.height == 0) {
+      // No image, or zero-sized image. Don't render.
+      return nullptr;
+    }
+
+    const auto aspectRatio = AspectRatio::FromSize(*videoSizeInPx);
+    const IntrinsicSize intrinsicSize(CSSPixel::ToAppUnits(*videoSizeInPx));
+    nsRect dest = nsLayoutUtils::ComputeObjectDestRect(
+        area, intrinsicSize, aspectRatio, Frame()->StylePosition());
+
+    aDestGFXRect = Frame()->PresContext()->AppUnitsToGfxUnits(dest);
+    aDestGFXRect.Round();
+    if (aDestGFXRect.IsEmpty()) {
+      return nullptr;
+    }
+
+    return container.forget();
+  }
+
+  virtual bool CreateWebRenderCommands(
+      mozilla::wr::DisplayListBuilder& aBuilder,
+      mozilla::wr::IpcResourceUpdateQueue& aResources,
+      const mozilla::layers::StackingContextHelper& aSc,
+      mozilla::layers::RenderRootStateManager* aManager,
+      nsDisplayListBuilder* aDisplayListBuilder) override {
+    HTMLVideoElement* element =
+        static_cast<HTMLVideoElement*>(Frame()->GetContent());
+    gfxRect destGFXRect;
+    RefPtr<ImageContainer> container = GetImageContainer(destGFXRect);
+    if (!container) {
+      return true;
+    }
+
+    container->SetRotation(element->RotationDegrees());
+
+    // 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 rect(destGFXRect.x, destGFXRect.y, destGFXRect.width,
+                          destGFXRect.height);
+    aManager->CommandBuilder().PushImage(this, container, aBuilder, aResources,
+                                         aSc, rect, rect);
+    return true;
+  }
+
+  // For opaque videos, we will want to override GetOpaqueRegion here.
+  // This is tracked by bug 1545498.
+
+  virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder,
+                           bool* aSnap) const override {
+    *aSnap = true;
+    nsIFrame* f = Frame();
+    return f->GetContentRectRelativeToSelf() + ToReferenceFrame();
+  }
+
+  // Only report FirstContentfulPaint when the video is set
+  bool IsContentful() const override {
+    nsVideoFrame* f = static_cast<nsVideoFrame*>(Frame());
+    HTMLVideoElement* video = HTMLVideoElement::FromNode(f->GetContent());
+    return video->VideoWidth() > 0;
+  }
+
+  virtual void Paint(nsDisplayListBuilder* aBuilder,
+                     gfxContext* aCtx) override {
+    HTMLVideoElement* element =
+        static_cast<HTMLVideoElement*>(Frame()->GetContent());
+    gfxRect destGFXRect;
+    RefPtr<ImageContainer> container = GetImageContainer(destGFXRect);
+    if (!container) {
+      return;
+    }
+
+    VideoRotation rotationDeg = element->RotationDegrees();
+    Matrix preTransform = ComputeRotationMatrix(
+        destGFXRect.Width(), destGFXRect.Height(), rotationDeg);
+    Matrix transform =
+        preTransform * Matrix::Translation(destGFXRect.x, destGFXRect.y);
+
+    AutoLockImage autoLock(container);
+    Image* image = autoLock.GetImage(TimeStamp::Now());
+    if (!image) {
+      return;
+    }
+    RefPtr<gfx::SourceSurface> surface = image->GetAsSourceSurface();
+    if (!surface || !surface->IsValid()) {
+      return;
+    }
+    gfx::IntSize size = surface->GetSize();
+
+    IntSize scaleToSize(static_cast<int32_t>(destGFXRect.Width()),
+                        static_cast<int32_t>(destGFXRect.Height()));
+    // scaleHint is set regardless of rotation, so swap w/h if needed.
+    SwapScaleWidthHeightForRotation(scaleToSize, rotationDeg);
+    transform.PreScale(scaleToSize.width / double(size.Width()),
+                       scaleToSize.height / double(size.Height()));
+
+    gfxContextMatrixAutoSaveRestore saveMatrix(aCtx);
+    aCtx->SetMatrix(
+        gfxUtils::SnapTransformTranslation(aCtx->CurrentMatrix(), nullptr));
+
+    transform = gfxUtils::SnapTransform(
+        transform, gfxRect(0, 0, size.width, size.height), nullptr);
+    aCtx->Multiply(ThebesMatrix(transform));
+
+    aCtx->GetDrawTarget()->FillRect(
+        Rect(0, 0, size.width, size.height),
+        SurfacePattern(surface, ExtendMode::CLAMP, Matrix(),
+                       nsLayoutUtils::GetSamplingFilterForFrame(Frame())),
+        DrawOptions());
+  }
+};
+
+}  // namespace mozilla
+
+void nsVideoFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
+                                    const nsDisplayListSet& aLists) {
+  if (!IsVisibleForPainting()) return;
+
+  DO_GLOBAL_REFLOW_COUNT_DSP("nsVideoFrame");
+
+  DisplayBorderBackgroundOutline(aBuilder, aLists);
+
+  if (HidesContent()) {
+    return;
+  }
+
+  const bool shouldDisplayPoster = ShouldDisplayPoster();
+
+  // NOTE: If we're displaying a poster image (instead of video data), we can
+  // trust the nsImageFrame to constrain its drawing to its content rect
+  // (which happens to be the same as our content rect).
+  uint32_t clipFlags;
+  if (shouldDisplayPoster ||
+      !nsStyleUtil::ObjectPropsMightCauseOverflow(StylePosition())) {
+    clipFlags = DisplayListClipState::ASSUME_DRAWING_RESTRICTED_TO_CONTENT_RECT;
+  } else {
+    clipFlags = 0;
+  }
+
+  DisplayListClipState::AutoClipContainingBlockDescendantsToContentBox clip(
+      aBuilder, this, clipFlags);
+
+  if (HasVideoElement() && !shouldDisplayPoster) {
+    aLists.Content()->AppendNewToTop<nsDisplayVideo>(aBuilder, this);
+  }
+
+  // Add child frames to display list. We expect various children,
+  // but only want to draw mPosterImage conditionally. Others we
+  // always add to the display list.
+  for (nsIFrame* child : mFrames) {
+    if (child->GetContent() != mPosterImage || shouldDisplayPoster) {
+      nsDisplayListBuilder::AutoBuildingDisplayList buildingForChild(
+          aBuilder, child,
+          aBuilder->GetVisibleRect() - child->GetOffsetTo(this),
+          aBuilder->GetDirtyRect() - child->GetOffsetTo(this));
+
+      child->BuildDisplayListForStackingContext(aBuilder, aLists.Content());
+    }
+  }
+}