Add m-esr52 at 52.6.0

1 files changed, 695 insertions, 0 deletions

diff --git a/layout/generic/nsVideoFrame.cpp b/layout/generic/nsVideoFrame.cpp
new file mode 100644
index 000000000..9f27684a7
--- /dev/null
+++ b/layout/generic/nsVideoFrame.cpp
@@ -0,0 +1,695 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* 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/dom/HTMLVideoElement.h"
+#include "nsIDOMHTMLImageElement.h"
+#include "nsDisplayList.h"
+#include "nsGenericHTMLElement.h"
+#include "nsPresContext.h"
+#include "nsContentCreatorFunctions.h"
+#include "nsBoxLayoutState.h"
+#include "nsBoxFrame.h"
+#include "nsImageFrame.h"
+#include "nsIImageLoadingContent.h"
+#include "nsContentUtils.h"
+#include "ImageContainer.h"
+#include "ImageLayers.h"
+#include "nsContentList.h"
+#include "nsStyleUtil.h"
+#include <algorithm>
+
+using namespace mozilla;
+using namespace mozilla::layers;
+using namespace mozilla::dom;
+using namespace mozilla::gfx;
+
+nsIFrame*
+NS_NewHTMLVideoFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
+{
+  return new (aPresShell) nsVideoFrame(aContext);
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsVideoFrame)
+
+// A matrix to obtain a correct-rotated video frame.
+static Matrix
+ComputeRotationMatrix(gfxFloat aRotatedWidth,
+                      gfxFloat aRotatedHeight,
+                      VideoInfo::Rotation aDegrees)
+{
+  Matrix shiftVideoCenterToOrigin;
+  if (aDegrees == VideoInfo::Rotation::kDegree_90 ||
+      aDegrees == VideoInfo::Rotation::kDegree_270) {
+    shiftVideoCenterToOrigin = Matrix::Translation(-aRotatedHeight / 2.0,
+                                                   -aRotatedWidth / 2.0);
+  } else {
+    shiftVideoCenterToOrigin = Matrix::Translation(-aRotatedWidth / 2.0,
+                                                   -aRotatedHeight / 2.0);
+  }
+
+  Matrix rotation = Matrix::Rotation(gfx::Float(aDegrees / 180.0 * M_PI));
+  Matrix shiftLeftTopToOrigin = Matrix::Translation(aRotatedWidth / 2.0,
+                                                    aRotatedHeight / 2.0);
+  return shiftVideoCenterToOrigin * rotation * shiftLeftTopToOrigin;
+}
+
+static void
+SwapScaleWidthHeightForRotation(IntSize& aSize, VideoInfo::Rotation aDegrees)
+{
+  if (aDegrees == VideoInfo::Rotation::kDegree_90 ||
+      aDegrees == VideoInfo::Rotation::kDegree_270) {
+    int32_t tmpWidth = aSize.width;
+    aSize.width = aSize.height;
+    aSize.height = tmpWidth;
+  }
+}
+
+nsVideoFrame::nsVideoFrame(nsStyleContext* aContext)
+  : nsContainerFrame(aContext)
+{
+  EnableVisibilityTracking();
+}
+
+nsVideoFrame::~nsVideoFrame()
+{
+}
+
+NS_QUERYFRAME_HEAD(nsVideoFrame)
+  NS_QUERYFRAME_ENTRY(nsVideoFrame)
+  NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
+NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
+
+nsresult
+nsVideoFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements)
+{
+  nsNodeInfoManager *nodeInfoManager = GetContent()->GetComposedDoc()->NodeInfoManager();
+  RefPtr<NodeInfo> nodeInfo;
+  Element *element;
+
+  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,
+                                            nsIDOMNode::ELEMENT_NODE);
+    NS_ENSURE_TRUE(nodeInfo, NS_ERROR_OUT_OF_MEMORY);
+    element = NS_NewHTMLImageElement(nodeInfo.forget());
+    mPosterImage = element;
+    NS_ENSURE_TRUE(mPosterImage, NS_ERROR_OUT_OF_MEMORY);
+
+    // Set the nsImageLoadingContent::ImageState() to 0. This means that the
+    // image will always report its state as 0, so it will never be reframed
+    // to show frames for loading or the broken image icon. This is important,
+    // as the image is native anonymous, and so can't be reframed (currently).
+    nsCOMPtr<nsIImageLoadingContent> imgContent = do_QueryInterface(mPosterImage);
+    NS_ENSURE_TRUE(imgContent, NS_ERROR_FAILURE);
+
+    imgContent->ForceImageState(true, 0);
+    // And now have it update its internal state
+    element->UpdateState(false);
+
+    UpdatePosterSource(false);
+
+    if (!aElements.AppendElement(mPosterImage))
+      return NS_ERROR_OUT_OF_MEMORY;
+
+    // Set up the caption overlay div for showing any TextTrack data
+    nodeInfo = nodeInfoManager->GetNodeInfo(nsGkAtoms::div,
+                                            nullptr,
+                                            kNameSpaceID_XHTML,
+                                            nsIDOMNode::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(NS_LITERAL_STRING("caption-box"));
+
+    if (!aElements.AppendElement(mCaptionDiv))
+      return NS_ERROR_OUT_OF_MEMORY;
+  }
+
+  // Set up "videocontrols" XUL element which will be XBL-bound to the
+  // actual controls.
+  nodeInfo = nodeInfoManager->GetNodeInfo(nsGkAtoms::videocontrols,
+                                          nullptr,
+                                          kNameSpaceID_XUL,
+                                          nsIDOMNode::ELEMENT_NODE);
+  NS_ENSURE_TRUE(nodeInfo, NS_ERROR_OUT_OF_MEMORY);
+
+  NS_TrustedNewXULElement(getter_AddRefs(mVideoControls), nodeInfo.forget());
+  if (!aElements.AppendElement(mVideoControls))
+    return NS_ERROR_OUT_OF_MEMORY;
+
+  return NS_OK;
+}
+
+void
+nsVideoFrame::AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
+                                       uint32_t aFliter)
+{
+  if (mPosterImage) {
+    aElements.AppendElement(mPosterImage);
+  }
+
+  if (mVideoControls) {
+    aElements.AppendElement(mVideoControls);
+  }
+
+  if (mCaptionDiv) {
+    aElements.AppendElement(mCaptionDiv);
+  }
+}
+
+void
+nsVideoFrame::DestroyFrom(nsIFrame* aDestructRoot)
+{
+  nsContentUtils::DestroyAnonymousContent(&mCaptionDiv);
+  nsContentUtils::DestroyAnonymousContent(&mVideoControls);
+  nsContentUtils::DestroyAnonymousContent(&mPosterImage);
+  nsContainerFrame::DestroyFrom(aDestructRoot);
+}
+
+bool
+nsVideoFrame::IsLeaf() const
+{
+  return true;
+}
+
+already_AddRefed<Layer>
+nsVideoFrame::BuildLayer(nsDisplayListBuilder* aBuilder,
+                         LayerManager* aManager,
+                         nsDisplayItem* aItem,
+                         const ContainerLayerParameters& aContainerParameters)
+{
+  nsRect area = GetContentRectRelativeToSelf() + aItem->ToReferenceFrame();
+  HTMLVideoElement* element = static_cast<HTMLVideoElement*>(GetContent());
+
+  nsIntSize videoSizeInPx;
+  if (NS_FAILED(element->GetVideoSize(&videoSizeInPx)) ||
+      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. No point creating a layer.
+    return nullptr;
+  }
+
+  // Convert video size from pixel units into app units, to get an aspect-ratio
+  // (which has to be represented as a nsSize) and an IntrinsicSize that we
+  // can pass to ComputeObjectRenderRect.
+  nsSize aspectRatio(nsPresContext::CSSPixelsToAppUnits(videoSizeInPx.width),
+                     nsPresContext::CSSPixelsToAppUnits(videoSizeInPx.height));
+  IntrinsicSize intrinsicSize;
+  intrinsicSize.width.SetCoordValue(aspectRatio.width);
+  intrinsicSize.height.SetCoordValue(aspectRatio.height);
+
+  nsRect dest = nsLayoutUtils::ComputeObjectDestRect(area,
+                                                     intrinsicSize,
+                                                     aspectRatio,
+                                                     StylePosition());
+
+  gfxRect destGFXRect = PresContext()->AppUnitsToGfxUnits(dest);
+  destGFXRect.Round();
+  if (destGFXRect.IsEmpty()) {
+    return nullptr;
+  }
+
+  VideoInfo::Rotation rotationDeg = element->RotationDegrees();
+  IntSize scaleHint(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(scaleHint, rotationDeg);
+  container->SetScaleHint(scaleHint);
+
+  RefPtr<ImageLayer> layer = static_cast<ImageLayer*>
+    (aManager->GetLayerBuilder()->GetLeafLayerFor(aBuilder, aItem));
+  if (!layer) {
+    layer = aManager->CreateImageLayer();
+    if (!layer)
+      return nullptr;
+  }
+
+  layer->SetContainer(container);
+  layer->SetSamplingFilter(nsLayoutUtils::GetSamplingFilterForFrame(this));
+  // Set a transform on the layer to draw the video in the right place
+  gfxPoint p = destGFXRect.TopLeft() + aContainerParameters.mOffset;
+
+  Matrix preTransform = ComputeRotationMatrix(destGFXRect.Width(),
+                                              destGFXRect.Height(),
+                                              rotationDeg);
+
+  Matrix transform = preTransform * Matrix::Translation(p.x, p.y);
+
+  layer->SetBaseTransform(gfx::Matrix4x4::From2D(transform));
+  layer->SetScaleToSize(scaleHint, ScaleMode::STRETCH);
+  RefPtr<Layer> result = layer.forget();
+  return result.forget();
+}
+
+class DispatchResizeToControls : public Runnable
+{
+public:
+  explicit DispatchResizeToControls(nsIContent* aContent)
+    : mContent(aContent) {}
+  NS_IMETHOD Run() override {
+    nsContentUtils::DispatchTrustedEvent(mContent->OwnerDoc(), mContent,
+                                         NS_LITERAL_STRING("resizevideocontrols"),
+                                         false, false);
+    return NS_OK;
+  }
+  nsCOMPtr<nsIContent> mContent;
+};
+
+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);
+  NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
+                 ("enter nsVideoFrame::Reflow: availSize=%d,%d",
+                  aReflowInput.AvailableWidth(),
+                  aReflowInput.AvailableHeight()));
+
+  NS_PRECONDITION(mState & NS_FRAME_IN_REFLOW, "frame is not in reflow");
+
+  aStatus = NS_FRAME_COMPLETE;
+
+  aMetrics.Width() = aReflowInput.ComputedWidth();
+  aMetrics.Height() = aReflowInput.ComputedHeight();
+
+  // stash this away so we can compute our inner area later
+  mBorderPadding   = aReflowInput.ComputedPhysicalBorderPadding();
+
+  aMetrics.Width() += mBorderPadding.left + mBorderPadding.right;
+  aMetrics.Height() += mBorderPadding.top + mBorderPadding.bottom;
+
+  // Reflow the child frames. We may have up to two, an image frame
+  // which is the poster, and a box frame, which is the video controls.
+  for (nsIFrame* child : mFrames) {
+    if (child->GetContent() == mPosterImage) {
+      // Reflow the poster frame.
+      nsImageFrame* imageFrame = static_cast<nsImageFrame*>(child);
+      ReflowOutput kidDesiredSize(aReflowInput);
+      WritingMode wm = imageFrame->GetWritingMode();
+      LogicalSize availableSize = aReflowInput.AvailableSize(wm);
+      LogicalSize cbSize = aMetrics.Size(aMetrics.GetWritingMode()).
+                             ConvertTo(wm, aMetrics.GetWritingMode());
+      ReflowInput kidReflowInput(aPresContext,
+                                       aReflowInput,
+                                       imageFrame,
+                                       availableSize,
+                                       &cbSize);
+
+      nsRect posterRenderRect;
+      if (ShouldDisplayPoster()) {
+        posterRenderRect =
+          nsRect(nsPoint(mBorderPadding.left, mBorderPadding.top),
+                 nsSize(aReflowInput.ComputedWidth(),
+                        aReflowInput.ComputedHeight()));
+      }
+      kidReflowInput.SetComputedWidth(posterRenderRect.width);
+      kidReflowInput.SetComputedHeight(posterRenderRect.height);
+      ReflowChild(imageFrame, aPresContext, kidDesiredSize, kidReflowInput,
+                  posterRenderRect.x, posterRenderRect.y, 0, aStatus);
+      FinishReflowChild(imageFrame, aPresContext,
+                        kidDesiredSize, &kidReflowInput,
+                        posterRenderRect.x, posterRenderRect.y, 0);
+    } else if (child->GetContent() == mVideoControls) {
+      // Reflow the video controls frame.
+      nsBoxLayoutState boxState(PresContext(), aReflowInput.mRenderingContext);
+      nsSize size = child->GetSize();
+      nsBoxFrame::LayoutChildAt(boxState,
+                                child,
+                                nsRect(mBorderPadding.left,
+                                       mBorderPadding.top,
+                                       aReflowInput.ComputedWidth(),
+                                       aReflowInput.ComputedHeight()));
+      if (child->GetSize() != size) {
+        RefPtr<Runnable> event = new DispatchResizeToControls(child->GetContent());
+        nsContentUtils::AddScriptRunner(event);
+      }
+    } else if (child->GetContent() == mCaptionDiv) {
+      // Reflow to caption div
+      ReflowOutput kidDesiredSize(aReflowInput);
+      WritingMode wm = child->GetWritingMode();
+      LogicalSize availableSize = aReflowInput.AvailableSize(wm);
+      LogicalSize cbSize = aMetrics.Size(aMetrics.GetWritingMode()).
+                             ConvertTo(wm, aMetrics.GetWritingMode());
+      ReflowInput kidReflowInput(aPresContext,
+                                       aReflowInput,
+                                       child,
+                                       availableSize,
+                                       &cbSize);
+      nsSize size(aReflowInput.ComputedWidth(), aReflowInput.ComputedHeight());
+      size.width -= kidReflowInput.ComputedPhysicalBorderPadding().LeftRight();
+      size.height -= kidReflowInput.ComputedPhysicalBorderPadding().TopBottom();
+
+      kidReflowInput.SetComputedWidth(std::max(size.width, 0));
+      kidReflowInput.SetComputedHeight(std::max(size.height, 0));
+
+      ReflowChild(child, aPresContext, kidDesiredSize, kidReflowInput,
+                  mBorderPadding.left, mBorderPadding.top, 0, aStatus);
+      FinishReflowChild(child, aPresContext,
+                        kidDesiredSize, &kidReflowInput,
+                        mBorderPadding.left, mBorderPadding.top, 0);
+    }
+  }
+  aMetrics.SetOverflowAreasToDesiredBounds();
+
+  FinishAndStoreOverflow(&aMetrics);
+
+  NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
+                 ("exit nsVideoFrame::Reflow: size=%d,%d",
+                  aMetrics.Width(), aMetrics.Height()));
+  NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aMetrics);
+}
+
+class nsDisplayVideo : public nsDisplayItem {
+public:
+  nsDisplayVideo(nsDisplayListBuilder* aBuilder, nsVideoFrame* aFrame)
+    : nsDisplayItem(aBuilder, aFrame)
+  {
+    MOZ_COUNT_CTOR(nsDisplayVideo);
+  }
+#ifdef NS_BUILD_REFCNT_LOGGING
+  virtual ~nsDisplayVideo() {
+    MOZ_COUNT_DTOR(nsDisplayVideo);
+  }
+#endif
+
+  NS_DISPLAY_DECL_NAME("Video", TYPE_VIDEO)
+
+  // It would be great if we could override GetOpaqueRegion to return nonempty here,
+  // but it's probably not safe to do so in general. Video frames are
+  // updated asynchronously from decoder threads, and it's possible that
+  // we might have an opaque video frame when GetOpaqueRegion is called, but
+  // when we come to paint, the video frame is transparent or has gone
+  // away completely (e.g. because of a decoder error). The problem would
+  // be especially acute if we have off-main-thread rendering.
+
+  virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) override
+  {
+    *aSnap = true;
+    nsIFrame* f = Frame();
+    return f->GetContentRectRelativeToSelf() + ToReferenceFrame();
+  }
+
+  virtual already_AddRefed<Layer> BuildLayer(nsDisplayListBuilder* aBuilder,
+                                             LayerManager* aManager,
+                                             const ContainerLayerParameters& aContainerParameters) override
+  {
+    return static_cast<nsVideoFrame*>(mFrame)->BuildLayer(aBuilder, aManager, this, aContainerParameters);
+  }
+
+  virtual LayerState GetLayerState(nsDisplayListBuilder* aBuilder,
+                                   LayerManager* aManager,
+                                   const ContainerLayerParameters& aParameters) override
+  {
+    if (aManager->IsCompositingCheap()) {
+      // Since ImageLayers don't require additional memory of the
+      // video frames we have to have anyway, we can't save much by
+      // making layers inactive. Also, for many accelerated layer
+      // managers calling imageContainer->GetCurrentAsSurface can be
+      // very expensive. So just always be active when compositing is
+      // cheap (i.e. hardware accelerated).
+      return LAYER_ACTIVE;
+    }
+    HTMLMediaElement* elem =
+      static_cast<HTMLMediaElement*>(mFrame->GetContent());
+    return elem->IsPotentiallyPlaying() ? LAYER_ACTIVE_FORCE : LAYER_INACTIVE;
+  }
+};
+
+void
+nsVideoFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
+                               const nsRect&           aDirtyRect,
+                               const nsDisplayListSet& aLists)
+{
+  if (!IsVisibleForPainting(aBuilder))
+    return;
+
+  DO_GLOBAL_REFLOW_COUNT_DSP("nsVideoFrame");
+
+  DisplayBorderBackgroundOutline(aBuilder, aLists);
+
+  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(
+      new (aBuilder) 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) {
+      child->BuildDisplayListForStackingContext(aBuilder,
+                                                aDirtyRect - child->GetOffsetTo(this),
+                                                aLists.Content());
+    } else if (child->GetType() == nsGkAtoms::boxFrame) {
+      child->BuildDisplayListForStackingContext(aBuilder,
+                                                aDirtyRect - child->GetOffsetTo(this),
+                                                aLists.Content());
+    }
+  }
+}
+
+nsIAtom*
+nsVideoFrame::GetType() const
+{
+  return nsGkAtoms::HTMLVideoFrame;
+}
+
+#ifdef ACCESSIBILITY
+a11y::AccType
+nsVideoFrame::AccessibleType()
+{
+  return a11y::eHTMLMediaType;
+}
+#endif
+
+#ifdef DEBUG_FRAME_DUMP
+nsresult
+nsVideoFrame::GetFrameName(nsAString& aResult) const
+{
+  return MakeFrameName(NS_LITERAL_STRING("HTMLVideo"), aResult);
+}
+#endif
+
+LogicalSize
+nsVideoFrame::ComputeSize(nsRenderingContext *aRenderingContext,
+                          WritingMode aWM,
+                          const LogicalSize& aCBSize,
+                          nscoord aAvailableISize,
+                          const LogicalSize& aMargin,
+                          const LogicalSize& aBorder,
+                          const LogicalSize& aPadding,
+                          ComputeSizeFlags aFlags)
+{
+  nsSize size = GetVideoIntrinsicSize(aRenderingContext);
+
+  IntrinsicSize intrinsicSize;
+  intrinsicSize.width.SetCoordValue(size.width);
+  intrinsicSize.height.SetCoordValue(size.height);
+
+  // Only video elements have an intrinsic ratio.
+  nsSize intrinsicRatio = HasVideoElement() ? size : nsSize(0, 0);
+
+  return ComputeSizeWithIntrinsicDimensions(aRenderingContext, aWM,
+                                            intrinsicSize, intrinsicRatio,
+                                            aCBSize, aMargin, aBorder, aPadding,
+                                            aFlags);
+}
+
+nscoord nsVideoFrame::GetMinISize(nsRenderingContext *aRenderingContext)
+{
+  nsSize size = GetVideoIntrinsicSize(aRenderingContext);
+  nscoord result = GetWritingMode().IsVertical() ? size.height : size.width;
+  DISPLAY_MIN_WIDTH(this, result);
+  return result;
+}
+
+nscoord nsVideoFrame::GetPrefISize(nsRenderingContext *aRenderingContext)
+{
+  nsSize size = GetVideoIntrinsicSize(aRenderingContext);
+  nscoord result = GetWritingMode().IsVertical() ? size.height : size.width;
+  DISPLAY_PREF_WIDTH(this, result);
+  return result;
+}
+
+nsSize nsVideoFrame::GetIntrinsicRatio()
+{
+  if (!HasVideoElement()) {
+    // Audio elements have no intrinsic ratio.
+    return nsSize(0, 0);
+  }
+
+  return GetVideoIntrinsicSize(nullptr);
+}
+
+bool nsVideoFrame::ShouldDisplayPoster()
+{
+  if (!HasVideoElement())
+    return false;
+
+  HTMLVideoElement* 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;
+}
+
+nsSize
+nsVideoFrame::GetVideoIntrinsicSize(nsRenderingContext *aRenderingContext)
+{
+  // Defaulting size to 300x150 if no size given.
+  nsIntSize size(300, 150);
+
+  if (!HasVideoElement()) {
+    if (!mFrames.FirstChild()) {
+      return nsSize(0, 0);
+    }
+
+    // Ask the controls frame what its preferred height is
+    nsBoxLayoutState boxState(PresContext(), aRenderingContext, 0);
+    nscoord prefHeight = mFrames.LastChild()->GetXULPrefSize(boxState).height;
+    return nsSize(nsPresContext::CSSPixelsToAppUnits(size.width), prefHeight);
+  }
+
+  HTMLVideoElement* element = static_cast<HTMLVideoElement*>(GetContent());
+  if (NS_FAILED(element->GetVideoSize(&size)) && ShouldDisplayPoster()) {
+    // Use the poster image frame's size.
+    nsIFrame *child = mPosterImage->GetPrimaryFrame();
+    nsImageFrame* imageFrame = do_QueryFrame(child);
+    nsSize imgsize;
+    if (NS_SUCCEEDED(imageFrame->GetIntrinsicImageSize(imgsize))) {
+      return imgsize;
+    }
+  }
+
+  return nsSize(nsPresContext::CSSPixelsToAppUnits(size.width),
+                nsPresContext::CSSPixelsToAppUnits(size.height));
+}
+
+void
+nsVideoFrame::UpdatePosterSource(bool aNotify)
+{
+  NS_ASSERTION(HasVideoElement(), "Only call this on <video> elements.");
+  HTMLVideoElement* element = static_cast<HTMLVideoElement*>(GetContent());
+
+  if (element->HasAttr(kNameSpaceID_None, 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,
+                               nsIAtom* aAttribute,
+                               int32_t aModType)
+{
+  if (aAttribute == nsGkAtoms::poster && HasVideoElement()) {
+    UpdatePosterSource(true);
+  }
+  return nsContainerFrame::AttributeChanged(aNameSpaceID,
+                                            aAttribute,
+                                            aModType);
+}
+
+void
+nsVideoFrame::OnVisibilityChange(Visibility aNewVisibility,
+                                 Maybe<OnNonvisible> aNonvisibleAction)
+{
+  if (HasVideoElement()) {
+    nsCOMPtr<nsIDOMHTMLMediaElement> mediaDomElement = do_QueryInterface(mContent);
+    mediaDomElement->OnVisibilityChange(aNewVisibility);
+  }
+
+  nsCOMPtr<nsIImageLoadingContent> imageLoader = do_QueryInterface(mPosterImage);
+  if (imageLoader) {
+    imageLoader->OnVisibilityChange(aNewVisibility,
+                                    aNonvisibleAction);
+  }
+
+  nsContainerFrame::OnVisibilityChange(aNewVisibility, aNonvisibleAction);
+}
+
+bool nsVideoFrame::HasVideoElement() {
+  nsCOMPtr<nsIDOMHTMLMediaElement> mediaDomElement = do_QueryInterface(mContent);
+  return mediaDomElement->IsVideo();
+}
+
+bool nsVideoFrame::HasVideoData()
+{
+  if (!HasVideoElement())
+    return false;
+  HTMLVideoElement* element = static_cast<HTMLVideoElement*>(GetContent());
+  nsIntSize size(0, 0);
+  element->GetVideoSize(&size);
+  return size != nsIntSize(0,0);
+}