mirror of
https://github.com/classilla/tenfourfox.git
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633 lines
23 KiB
C++
633 lines
23 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* rendering object for the HTML <video> element */
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#include "nsVideoFrame.h"
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#include "nsCOMPtr.h"
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#include "nsGkAtoms.h"
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#include "mozilla/dom/HTMLVideoElement.h"
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#include "nsIDOMHTMLImageElement.h"
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#include "nsDisplayList.h"
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#include "nsGenericHTMLElement.h"
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#include "nsPresContext.h"
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#include "nsContentCreatorFunctions.h"
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#include "nsBoxLayoutState.h"
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#include "nsBoxFrame.h"
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#include "nsImageFrame.h"
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#include "nsIImageLoadingContent.h"
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#include "nsContentUtils.h"
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#include "ImageContainer.h"
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#include "ImageLayers.h"
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#include "nsContentList.h"
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#include "nsStyleUtil.h"
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#include <algorithm>
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using namespace mozilla;
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using namespace mozilla::layers;
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using namespace mozilla::dom;
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using namespace mozilla::gfx;
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nsIFrame*
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NS_NewHTMLVideoFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
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{
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return new (aPresShell) nsVideoFrame(aContext);
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsVideoFrame)
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nsVideoFrame::nsVideoFrame(nsStyleContext* aContext) :
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nsContainerFrame(aContext)
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{
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}
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nsVideoFrame::~nsVideoFrame()
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{
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}
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NS_QUERYFRAME_HEAD(nsVideoFrame)
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NS_QUERYFRAME_ENTRY(nsVideoFrame)
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NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
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NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
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nsresult
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nsVideoFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements)
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{
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nsNodeInfoManager *nodeInfoManager = GetContent()->GetComposedDoc()->NodeInfoManager();
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RefPtr<NodeInfo> nodeInfo;
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Element *element;
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if (HasVideoElement()) {
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// Create an anonymous image element as a child to hold the poster
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// image. We may not have a poster image now, but one could be added
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// before we load, or on a subsequent load.
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nodeInfo = nodeInfoManager->GetNodeInfo(nsGkAtoms::img,
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nullptr,
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kNameSpaceID_XHTML,
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nsIDOMNode::ELEMENT_NODE);
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NS_ENSURE_TRUE(nodeInfo, NS_ERROR_OUT_OF_MEMORY);
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element = NS_NewHTMLImageElement(nodeInfo.forget());
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mPosterImage = element;
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NS_ENSURE_TRUE(mPosterImage, NS_ERROR_OUT_OF_MEMORY);
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// Set the nsImageLoadingContent::ImageState() to 0. This means that the
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// image will always report its state as 0, so it will never be reframed
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// to show frames for loading or the broken image icon. This is important,
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// as the image is native anonymous, and so can't be reframed (currently).
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nsCOMPtr<nsIImageLoadingContent> imgContent = do_QueryInterface(mPosterImage);
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NS_ENSURE_TRUE(imgContent, NS_ERROR_FAILURE);
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imgContent->ForceImageState(true, 0);
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// And now have it update its internal state
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element->UpdateState(false);
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UpdatePosterSource(false);
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if (!aElements.AppendElement(mPosterImage))
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return NS_ERROR_OUT_OF_MEMORY;
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// Set up the caption overlay div for showing any TextTrack data
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nodeInfo = nodeInfoManager->GetNodeInfo(nsGkAtoms::div,
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nullptr,
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kNameSpaceID_XHTML,
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nsIDOMNode::ELEMENT_NODE);
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NS_ENSURE_TRUE(nodeInfo, NS_ERROR_OUT_OF_MEMORY);
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mCaptionDiv = NS_NewHTMLDivElement(nodeInfo.forget());
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NS_ENSURE_TRUE(mCaptionDiv, NS_ERROR_OUT_OF_MEMORY);
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nsGenericHTMLElement* div = static_cast<nsGenericHTMLElement*>(mCaptionDiv.get());
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div->SetClassName(NS_LITERAL_STRING("caption-box"));
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if (!aElements.AppendElement(mCaptionDiv))
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return NS_ERROR_OUT_OF_MEMORY;
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}
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// Set up "videocontrols" XUL element which will be XBL-bound to the
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// actual controls.
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nodeInfo = nodeInfoManager->GetNodeInfo(nsGkAtoms::videocontrols,
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nullptr,
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kNameSpaceID_XUL,
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nsIDOMNode::ELEMENT_NODE);
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NS_ENSURE_TRUE(nodeInfo, NS_ERROR_OUT_OF_MEMORY);
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NS_TrustedNewXULElement(getter_AddRefs(mVideoControls), nodeInfo.forget());
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if (!aElements.AppendElement(mVideoControls))
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return NS_ERROR_OUT_OF_MEMORY;
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return NS_OK;
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}
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void
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nsVideoFrame::AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
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uint32_t aFliter)
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{
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if (mPosterImage) {
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aElements.AppendElement(mPosterImage);
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}
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if (mVideoControls) {
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aElements.AppendElement(mVideoControls);
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}
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if (mCaptionDiv) {
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aElements.AppendElement(mCaptionDiv);
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}
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}
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void
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nsVideoFrame::DestroyFrom(nsIFrame* aDestructRoot)
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{
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nsContentUtils::DestroyAnonymousContent(&mCaptionDiv);
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nsContentUtils::DestroyAnonymousContent(&mVideoControls);
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nsContentUtils::DestroyAnonymousContent(&mPosterImage);
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nsContainerFrame::DestroyFrom(aDestructRoot);
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}
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bool
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nsVideoFrame::IsLeaf() const
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{
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return true;
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}
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already_AddRefed<Layer>
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nsVideoFrame::BuildLayer(nsDisplayListBuilder* aBuilder,
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LayerManager* aManager,
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nsDisplayItem* aItem,
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const ContainerLayerParameters& aContainerParameters)
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{
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nsRect area = GetContentRectRelativeToSelf() + aItem->ToReferenceFrame();
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HTMLVideoElement* element = static_cast<HTMLVideoElement*>(GetContent());
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nsIntSize videoSizeInPx;
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if (NS_FAILED(element->GetVideoSize(&videoSizeInPx)) ||
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area.IsEmpty()) {
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return nullptr;
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}
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RefPtr<ImageContainer> container = element->GetImageContainer();
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if (!container)
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return nullptr;
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// Retrieve the size of the decoded video frame, before being scaled
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// by pixel aspect ratio.
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mozilla::gfx::IntSize frameSize = container->GetCurrentSize();
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if (frameSize.width == 0 || frameSize.height == 0) {
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// No image, or zero-sized image. No point creating a layer.
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return nullptr;
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}
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// Convert video size from pixel units into app units, to get an aspect-ratio
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// (which has to be represented as a nsSize) and an IntrinsicSize that we
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// can pass to ComputeObjectRenderRect.
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nsSize aspectRatio(nsPresContext::CSSPixelsToAppUnits(videoSizeInPx.width),
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nsPresContext::CSSPixelsToAppUnits(videoSizeInPx.height));
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IntrinsicSize intrinsicSize;
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intrinsicSize.width.SetCoordValue(aspectRatio.width);
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intrinsicSize.height.SetCoordValue(aspectRatio.height);
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nsRect dest = nsLayoutUtils::ComputeObjectDestRect(area,
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intrinsicSize,
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aspectRatio,
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StylePosition());
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gfxRect destGFXRect = PresContext()->AppUnitsToGfxUnits(dest);
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destGFXRect.Round();
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if (destGFXRect.IsEmpty()) {
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return nullptr;
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}
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IntSize scaleHint(static_cast<int32_t>(destGFXRect.Width()),
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static_cast<int32_t>(destGFXRect.Height()));
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container->SetScaleHint(scaleHint);
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RefPtr<ImageLayer> layer = static_cast<ImageLayer*>
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(aManager->GetLayerBuilder()->GetLeafLayerFor(aBuilder, aItem));
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if (!layer) {
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layer = aManager->CreateImageLayer();
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if (!layer)
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return nullptr;
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}
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layer->SetContainer(container);
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layer->SetFilter(nsLayoutUtils::GetGraphicsFilterForFrame(this));
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// Set a transform on the layer to draw the video in the right place
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gfxPoint p = destGFXRect.TopLeft() + aContainerParameters.mOffset;
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Matrix transform = Matrix::Translation(p.x, p.y);
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layer->SetBaseTransform(gfx::Matrix4x4::From2D(transform));
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layer->SetScaleToSize(scaleHint, ScaleMode::STRETCH);
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RefPtr<Layer> result = layer.forget();
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return result.forget();
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}
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class DispatchResizeToControls : public nsRunnable
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{
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public:
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explicit DispatchResizeToControls(nsIContent* aContent)
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: mContent(aContent) {}
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NS_IMETHOD Run() override {
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nsContentUtils::DispatchTrustedEvent(mContent->OwnerDoc(), mContent,
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NS_LITERAL_STRING("resizevideocontrols"),
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false, false);
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return NS_OK;
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}
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nsCOMPtr<nsIContent> mContent;
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};
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void
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nsVideoFrame::Reflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aMetrics,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus)
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{
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MarkInReflow();
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DO_GLOBAL_REFLOW_COUNT("nsVideoFrame");
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DISPLAY_REFLOW(aPresContext, this, aReflowState, aMetrics, aStatus);
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NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
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("enter nsVideoFrame::Reflow: availSize=%d,%d",
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aReflowState.AvailableWidth(), aReflowState.AvailableHeight()));
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NS_PRECONDITION(mState & NS_FRAME_IN_REFLOW, "frame is not in reflow");
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aStatus = NS_FRAME_COMPLETE;
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aMetrics.Width() = aReflowState.ComputedWidth();
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aMetrics.Height() = aReflowState.ComputedHeight();
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// stash this away so we can compute our inner area later
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mBorderPadding = aReflowState.ComputedPhysicalBorderPadding();
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aMetrics.Width() += mBorderPadding.left + mBorderPadding.right;
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aMetrics.Height() += mBorderPadding.top + mBorderPadding.bottom;
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// Reflow the child frames. We may have up to two, an image frame
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// which is the poster, and a box frame, which is the video controls.
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for (nsIFrame* child : mFrames) {
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if (child->GetContent() == mPosterImage) {
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// Reflow the poster frame.
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nsImageFrame* imageFrame = static_cast<nsImageFrame*>(child);
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nsHTMLReflowMetrics kidDesiredSize(aReflowState);
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WritingMode wm = imageFrame->GetWritingMode();
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LogicalSize availableSize = aReflowState.AvailableSize(wm);
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LogicalSize cbSize = aMetrics.Size(aMetrics.GetWritingMode()).
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ConvertTo(wm, aMetrics.GetWritingMode());
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nsHTMLReflowState kidReflowState(aPresContext,
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aReflowState,
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imageFrame,
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availableSize,
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&cbSize);
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nsRect posterRenderRect;
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if (ShouldDisplayPoster()) {
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posterRenderRect =
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nsRect(nsPoint(mBorderPadding.left, mBorderPadding.top),
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nsSize(aReflowState.ComputedWidth(),
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aReflowState.ComputedHeight()));
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}
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kidReflowState.SetComputedWidth(posterRenderRect.width);
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kidReflowState.SetComputedHeight(posterRenderRect.height);
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ReflowChild(imageFrame, aPresContext, kidDesiredSize, kidReflowState,
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posterRenderRect.x, posterRenderRect.y, 0, aStatus);
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FinishReflowChild(imageFrame, aPresContext,
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kidDesiredSize, &kidReflowState,
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posterRenderRect.x, posterRenderRect.y, 0);
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} else if (child->GetContent() == mVideoControls) {
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// Reflow the video controls frame.
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nsBoxLayoutState boxState(PresContext(), aReflowState.rendContext);
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nsSize size = child->GetSize();
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nsBoxFrame::LayoutChildAt(boxState,
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child,
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nsRect(mBorderPadding.left,
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mBorderPadding.top,
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aReflowState.ComputedWidth(),
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aReflowState.ComputedHeight()));
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if (child->GetSize() != size) {
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RefPtr<nsRunnable> event = new DispatchResizeToControls(child->GetContent());
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nsContentUtils::AddScriptRunner(event);
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}
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} else if (child->GetContent() == mCaptionDiv) {
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// Reflow to caption div
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nsHTMLReflowMetrics kidDesiredSize(aReflowState);
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WritingMode wm = child->GetWritingMode();
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LogicalSize availableSize = aReflowState.AvailableSize(wm);
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LogicalSize cbSize = aMetrics.Size(aMetrics.GetWritingMode()).
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ConvertTo(wm, aMetrics.GetWritingMode());
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nsHTMLReflowState kidReflowState(aPresContext,
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aReflowState,
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child,
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availableSize,
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&cbSize);
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nsSize size(aReflowState.ComputedWidth(), aReflowState.ComputedHeight());
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size.width -= kidReflowState.ComputedPhysicalBorderPadding().LeftRight();
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size.height -= kidReflowState.ComputedPhysicalBorderPadding().TopBottom();
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kidReflowState.SetComputedWidth(std::max(size.width, 0));
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kidReflowState.SetComputedHeight(std::max(size.height, 0));
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ReflowChild(child, aPresContext, kidDesiredSize, kidReflowState,
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mBorderPadding.left, mBorderPadding.top, 0, aStatus);
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FinishReflowChild(child, aPresContext,
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kidDesiredSize, &kidReflowState,
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mBorderPadding.left, mBorderPadding.top, 0);
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}
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}
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aMetrics.SetOverflowAreasToDesiredBounds();
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FinishAndStoreOverflow(&aMetrics);
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NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
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("exit nsVideoFrame::Reflow: size=%d,%d",
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aMetrics.Width(), aMetrics.Height()));
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NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aMetrics);
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}
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class nsDisplayVideo : public nsDisplayItem {
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public:
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nsDisplayVideo(nsDisplayListBuilder* aBuilder, nsVideoFrame* aFrame)
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: nsDisplayItem(aBuilder, aFrame)
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{
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MOZ_COUNT_CTOR(nsDisplayVideo);
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}
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#ifdef NS_BUILD_REFCNT_LOGGING
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virtual ~nsDisplayVideo() {
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MOZ_COUNT_DTOR(nsDisplayVideo);
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}
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#endif
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NS_DISPLAY_DECL_NAME("Video", TYPE_VIDEO)
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// It would be great if we could override GetOpaqueRegion to return nonempty here,
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// but it's probably not safe to do so in general. Video frames are
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// updated asynchronously from decoder threads, and it's possible that
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// we might have an opaque video frame when GetOpaqueRegion is called, but
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// when we come to paint, the video frame is transparent or has gone
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// away completely (e.g. because of a decoder error). The problem would
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// be especially acute if we have off-main-thread rendering.
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virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) override
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{
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*aSnap = true;
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nsIFrame* f = Frame();
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return f->GetContentRectRelativeToSelf() + ToReferenceFrame();
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}
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virtual already_AddRefed<Layer> BuildLayer(nsDisplayListBuilder* aBuilder,
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LayerManager* aManager,
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const ContainerLayerParameters& aContainerParameters) override
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{
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return static_cast<nsVideoFrame*>(mFrame)->BuildLayer(aBuilder, aManager, this, aContainerParameters);
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}
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virtual LayerState GetLayerState(nsDisplayListBuilder* aBuilder,
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LayerManager* aManager,
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const ContainerLayerParameters& aParameters) override
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{
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if (aManager->IsCompositingCheap()) {
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// Since ImageLayers don't require additional memory of the
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// video frames we have to have anyway, we can't save much by
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// making layers inactive. Also, for many accelerated layer
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// managers calling imageContainer->GetCurrentAsSurface can be
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// very expensive. So just always be active when compositing is
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// cheap (i.e. hardware accelerated).
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return LAYER_ACTIVE;
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}
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HTMLMediaElement* elem =
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static_cast<HTMLMediaElement*>(mFrame->GetContent());
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return elem->IsPotentiallyPlaying() ? LAYER_ACTIVE_FORCE : LAYER_INACTIVE;
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}
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};
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void
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nsVideoFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists)
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{
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if (!IsVisibleForPainting(aBuilder))
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return;
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DO_GLOBAL_REFLOW_COUNT_DSP("nsVideoFrame");
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DisplayBorderBackgroundOutline(aBuilder, aLists);
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const bool shouldDisplayPoster = ShouldDisplayPoster();
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// NOTE: If we're displaying a poster image (instead of video data), we can
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// trust the nsImageFrame to constrain its drawing to its content rect
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// (which happens to be the same as our content rect).
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uint32_t clipFlags;
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if (shouldDisplayPoster ||
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!nsStyleUtil::ObjectPropsMightCauseOverflow(StylePosition())) {
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clipFlags =
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DisplayListClipState::ASSUME_DRAWING_RESTRICTED_TO_CONTENT_RECT;
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} else {
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clipFlags = 0;
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}
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DisplayListClipState::AutoClipContainingBlockDescendantsToContentBox
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clip(aBuilder, this, clipFlags);
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if (HasVideoElement() && !shouldDisplayPoster) {
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aLists.Content()->AppendNewToTop(
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new (aBuilder) nsDisplayVideo(aBuilder, this));
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}
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// Add child frames to display list. We expect various children,
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// but only want to draw mPosterImage conditionally. Others we
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// always add to the display list.
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for (nsIFrame* child : mFrames) {
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if (child->GetContent() != mPosterImage || shouldDisplayPoster) {
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child->BuildDisplayListForStackingContext(aBuilder,
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aDirtyRect - child->GetOffsetTo(this),
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aLists.Content());
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} else if (child->GetType() == nsGkAtoms::boxFrame) {
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child->BuildDisplayListForStackingContext(aBuilder,
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aDirtyRect - child->GetOffsetTo(this),
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aLists.Content());
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}
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}
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}
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nsIAtom*
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nsVideoFrame::GetType() const
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{
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return nsGkAtoms::HTMLVideoFrame;
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}
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#ifdef ACCESSIBILITY
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a11y::AccType
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nsVideoFrame::AccessibleType()
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{
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return a11y::eHTMLMediaType;
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}
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#endif
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#ifdef DEBUG_FRAME_DUMP
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nsresult
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nsVideoFrame::GetFrameName(nsAString& aResult) const
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{
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return MakeFrameName(NS_LITERAL_STRING("HTMLVideo"), aResult);
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}
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#endif
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LogicalSize
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nsVideoFrame::ComputeSize(nsRenderingContext *aRenderingContext,
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WritingMode aWM,
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const LogicalSize& aCBSize,
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nscoord aAvailableISize,
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const LogicalSize& aMargin,
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const LogicalSize& aBorder,
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const LogicalSize& aPadding,
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ComputeSizeFlags aFlags)
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{
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|
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 nsLayoutUtils::ComputeSizeWithIntrinsicDimensions(aWM, aRenderingContext,
|
|
this,
|
|
intrinsicSize,
|
|
intrinsicRatio,
|
|
aCBSize,
|
|
aMargin,
|
|
aBorder,
|
|
aPadding);
|
|
}
|
|
|
|
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()->GetPrefSize(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)) {
|
|
nsAutoString posterStr;
|
|
element->GetPoster(posterStr);
|
|
mPosterImage->SetAttr(kNameSpaceID_None,
|
|
nsGkAtoms::src,
|
|
posterStr,
|
|
aNotify);
|
|
} else {
|
|
mPosterImage->UnsetAttr(kNameSpaceID_None, nsGkAtoms::poster, 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);
|
|
}
|
|
|
|
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);
|
|
}
|