зеркало из https://github.com/mozilla/gecko-dev.git
138 строки
4.9 KiB
C++
138 строки
4.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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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#ifndef nsVideoFrame_h___
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#define nsVideoFrame_h___
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#include "mozilla/Attributes.h"
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#include "nsContainerFrame.h"
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#include "nsIAnonymousContentCreator.h"
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#include "nsIReflowCallback.h"
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#include "nsStringFwd.h"
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#include "nsTArrayForwardDeclare.h"
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class nsPresContext;
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class nsDisplayItem;
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class nsVideoFrame final : public nsContainerFrame,
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public nsIReflowCallback,
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public nsIAnonymousContentCreator {
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public:
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template <typename T>
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using Maybe = mozilla::Maybe<T>;
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using Nothing = mozilla::Nothing;
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using Visibility = mozilla::Visibility;
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explicit nsVideoFrame(ComputedStyle*, nsPresContext*);
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NS_DECL_QUERYFRAME
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NS_DECL_FRAMEARENA_HELPERS(nsVideoFrame)
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void ReflowCallbackCanceled() final { mReflowCallbackPosted = false; }
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bool ReflowFinished() final;
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void BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsDisplayListSet& aLists) override;
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nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
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int32_t aModType) override;
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void OnVisibilityChange(
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Visibility aNewVisibility,
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const Maybe<OnNonvisible>& aNonvisibleAction = Nothing()) override;
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/* get the size of the video's display */
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mozilla::IntrinsicSize GetIntrinsicSize() override;
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mozilla::AspectRatio GetIntrinsicRatio() const override;
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SizeComputationResult ComputeSize(
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gfxContext* aRenderingContext, mozilla::WritingMode aWM,
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const mozilla::LogicalSize& aCBSize, nscoord aAvailableISize,
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const mozilla::LogicalSize& aMargin,
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const mozilla::LogicalSize& aBorderPadding,
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const mozilla::StyleSizeOverrides& aSizeOverrides,
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mozilla::ComputeSizeFlags aFlags) override;
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nscoord GetMinISize(gfxContext* aRenderingContext) override;
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nscoord GetPrefISize(gfxContext* aRenderingContext) override;
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void DestroyFrom(nsIFrame* aDestructRoot,
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PostDestroyData& aPostDestroyData) override;
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void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
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const ReflowInput& aReflowInput,
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nsReflowStatus& aStatus) override;
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#ifdef ACCESSIBILITY
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mozilla::a11y::AccType AccessibleType() override;
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#endif
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bool IsFrameOfType(uint32_t aFlags) const override {
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// audio element with visible controls is an inline element, so we don't
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// apply aspect-ratio.
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if ((aFlags & nsIFrame::eSupportsAspectRatio) && !HasVideoElement()) {
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return false;
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}
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return nsSplittableFrame::IsFrameOfType(
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aFlags & ~(nsIFrame::eReplaced | nsIFrame::eReplacedSizing));
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}
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nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements) override;
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void AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
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uint32_t aFilters) override;
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mozilla::dom::Element* GetPosterImage() const { return mPosterImage; }
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// Returns true if we should display the poster. Note that once we show
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// a video frame, the poster will never be displayed again.
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bool ShouldDisplayPoster() const;
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nsIContent* GetCaptionOverlay() const { return mCaptionDiv; }
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nsIContent* GetVideoControls() const;
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#ifdef DEBUG_FRAME_DUMP
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nsresult GetFrameName(nsAString& aResult) const override;
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#endif
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protected:
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// Returns true if we're rendering for a video element. We still create
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// nsVideoFrame to render controls for an audio element.
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bool HasVideoElement() const;
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// Returns true if there is video data to render. Can return false
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// when we're the frame for an audio element, or we've created a video
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// element for a media which is audio-only.
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bool HasVideoData() const;
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// Get the poster image's size if there is any.
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mozilla::Maybe<nsSize> PosterImageSize() const;
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// Sets the mPosterImage's src attribute to be the video's poster attribute,
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// if we're the frame for a video element. Only call on frames for video
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// elements, not for frames for audio elements.
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void UpdatePosterSource(bool aNotify);
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// Notify the mediaElement that the mCaptionDiv was created.
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void UpdateTextTrack();
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virtual ~nsVideoFrame();
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// Anonymous child which is the image element of the poster frame.
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RefPtr<mozilla::dom::Element> mPosterImage;
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// Anonymous child which is the text track caption display div.
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nsCOMPtr<nsIContent> mCaptionDiv;
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// Some sizes tracked for notification purposes.
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// TODO: Maybe the calling code could be rewritten to use ResizeObserver for
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// this nowadays.
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nsSize mControlsTrackedSize{-1, -1};
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nsSize mCaptionTrackedSize{-1, -1};
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bool mReflowCallbackPosted = false;
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};
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#endif /* nsVideoFrame_h___ */
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