зеркало из https://github.com/mozilla/gecko-dev.git
116 строки
3.9 KiB
C++
116 строки
3.9 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 <canvas> element */
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#ifndef nsHTMLCanvasFrame_h___
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#define nsHTMLCanvasFrame_h___
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#include "mozilla/Attributes.h"
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#include "nsContainerFrame.h"
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#include "nsStringFwd.h"
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#include "FrameLayerBuilder.h"
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namespace mozilla {
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class PresShell;
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namespace layers {
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class CanvasRenderer;
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class Layer;
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class LayerManager;
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class WebRenderCanvasData;
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} // namespace layers
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} // namespace mozilla
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class nsPresContext;
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class nsDisplayItem;
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nsIFrame* NS_NewHTMLCanvasFrame(mozilla::PresShell* aPresShell,
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mozilla::ComputedStyle* aStyle);
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class nsHTMLCanvasFrame final : public nsContainerFrame {
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public:
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typedef mozilla::layers::CanvasRenderer CanvasRenderer;
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typedef mozilla::layers::Layer Layer;
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typedef mozilla::layers::LayerManager LayerManager;
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typedef mozilla::layers::WebRenderCanvasData WebRenderCanvasData;
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typedef mozilla::ContainerLayerParameters ContainerLayerParameters;
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NS_DECL_QUERYFRAME
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NS_DECL_FRAMEARENA_HELPERS(nsHTMLCanvasFrame)
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explicit nsHTMLCanvasFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
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: nsContainerFrame(aStyle, aPresContext, kClassID),
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mBorderPadding(GetWritingMode()) {}
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virtual void Init(nsIContent* aContent, nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) override;
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virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsDisplayListSet& aLists) override;
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void DestroyFrom(nsIFrame*, PostDestroyData&) override;
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already_AddRefed<Layer> BuildLayer(
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nsDisplayListBuilder* aBuilder, LayerManager* aManager,
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nsDisplayItem* aItem,
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const ContainerLayerParameters& aContainerParameters);
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bool UpdateWebRenderCanvasData(nsDisplayListBuilder* aBuilder,
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WebRenderCanvasData* aCanvasData);
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/* get the size of the canvas's image */
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nsIntSize GetCanvasSize() const;
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virtual nscoord GetMinISize(gfxContext* aRenderingContext) override;
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virtual nscoord GetPrefISize(gfxContext* aRenderingContext) override;
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virtual 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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virtual void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
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const ReflowInput& aReflowInput,
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nsReflowStatus& aStatus) override;
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nsRect GetInnerArea() const;
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#ifdef ACCESSIBILITY
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virtual mozilla::a11y::AccType AccessibleType() override;
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#endif
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virtual bool IsFrameOfType(uint32_t aFlags) const override {
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return nsSplittableFrame::IsFrameOfType(
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aFlags & ~(nsIFrame::eReplaced | nsIFrame::eReplacedSizing));
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}
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#ifdef DEBUG_FRAME_DUMP
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virtual nsresult GetFrameName(nsAString& aResult) const override;
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#endif
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// Inserted child content gets its frames parented by our child block
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virtual nsContainerFrame* GetContentInsertionFrame() override {
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return PrincipalChildList().FirstChild()->GetContentInsertionFrame();
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}
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// Return the ::-moz-html-canvas-content anonymous box.
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void AppendDirectlyOwnedAnonBoxes(nsTArray<OwnedAnonBox>& aResult) override;
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protected:
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virtual ~nsHTMLCanvasFrame();
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nscoord GetContinuationOffset(nscoord* aWidth = 0) const;
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mozilla::LogicalMargin mBorderPadding;
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};
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#endif /* nsHTMLCanvasFrame_h___ */
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