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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 <canvas> element */
#ifndef nsHTMLCanvasFrame_h___
#define nsHTMLCanvasFrame_h___
#include "mozilla/Attributes.h"
#include "nsContainerFrame.h"
#include "FrameLayerBuilder.h"
namespace mozilla {
namespace layers {
class Layer;
class LayerManager;
} // namespace layers
} // namespace mozilla
class nsPresContext;
class nsDisplayItem;
class nsAString;
nsIFrame* NS_NewHTMLCanvasFrame (nsIPresShell* aPresShell, nsStyleContext* aContext);
class nsHTMLCanvasFrame : public nsContainerFrame
{
public:
typedef mozilla::layers::Layer Layer;
typedef mozilla::layers::LayerManager LayerManager;
typedef mozilla::ContainerLayerParameters ContainerLayerParameters;
NS_DECL_QUERYFRAME_TARGET(nsHTMLCanvasFrame)
NS_DECL_QUERYFRAME
NS_DECL_FRAMEARENA_HELPERS
explicit nsHTMLCanvasFrame(nsStyleContext* aContext)
: nsContainerFrame(aContext)
, mBorderPadding(GetWritingMode()) {}
virtual void Init(nsIContent* aContent,
nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) override;
virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) override;
already_AddRefed<Layer> BuildLayer(nsDisplayListBuilder* aBuilder,
LayerManager* aManager,
nsDisplayItem* aItem,
const ContainerLayerParameters& aContainerParameters);
/* get the size of the canvas's image */
nsIntSize GetCanvasSize();
virtual nscoord GetMinISize(nsRenderingContext *aRenderingContext) override;
virtual nscoord GetPrefISize(nsRenderingContext *aRenderingContext) override;
virtual mozilla::IntrinsicSize GetIntrinsicSize() override;
virtual mozilla::AspectRatio GetIntrinsicRatio() override;
virtual mozilla::LogicalSize
ComputeSize(nsRenderingContext *aRenderingContext,
mozilla::WritingMode aWritingMode,
const mozilla::LogicalSize& aCBSize,
nscoord aAvailableISize,
const mozilla::LogicalSize& aMargin,
const mozilla::LogicalSize& aBorder,
const mozilla::LogicalSize& aPadding,
ComputeSizeFlags aFlags) override;
virtual void Reflow(nsPresContext* aPresContext,
ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus) override;
nsRect GetInnerArea() const;
#ifdef ACCESSIBILITY
virtual mozilla::a11y::AccType AccessibleType() override;
#endif
virtual nsIAtom* GetType() const override;
virtual bool IsFrameOfType(uint32_t aFlags) const override
{
return nsSplittableFrame::IsFrameOfType(aFlags &
~(nsIFrame::eReplaced | nsIFrame::eReplacedSizing));
}
#ifdef DEBUG_FRAME_DUMP
virtual nsresult GetFrameName(nsAString& aResult) const override;
#endif
// Inserted child content gets its frames parented by our child block
virtual nsContainerFrame* GetContentInsertionFrame() override {
return PrincipalChildList().FirstChild()->GetContentInsertionFrame();
}
protected:
virtual ~nsHTMLCanvasFrame();
nscoord GetContinuationOffset(nscoord* aWidth = 0) const;
mozilla::LogicalMargin mBorderPadding;
};
#endif /* nsHTMLCanvasFrame_h___ */
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