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-rw-r--r--layout/generic/nsHTMLCanvasFrame.h98
1 files changed, 98 insertions, 0 deletions
diff --git a/layout/generic/nsHTMLCanvasFrame.h b/layout/generic/nsHTMLCanvasFrame.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 "nsStringFwd.h"
+
+namespace mozilla {
+class PresShell;
+namespace layers {
+class CanvasRenderer;
+class Layer;
+class LayerManager;
+class WebRenderCanvasData;
+} // namespace layers
+} // namespace mozilla
+
+class nsPresContext;
+
+nsIFrame* NS_NewHTMLCanvasFrame(mozilla::PresShell* aPresShell,
+ mozilla::ComputedStyle* aStyle);
+
+class nsHTMLCanvasFrame final : public nsContainerFrame {
+ public:
+ typedef mozilla::layers::CanvasRenderer CanvasRenderer;
+ typedef mozilla::layers::LayerManager LayerManager;
+ typedef mozilla::layers::WebRenderCanvasData WebRenderCanvasData;
+
+ NS_DECL_QUERYFRAME
+ NS_DECL_FRAMEARENA_HELPERS(nsHTMLCanvasFrame)
+
+ nsHTMLCanvasFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
+ : nsContainerFrame(aStyle, aPresContext, kClassID) {}
+
+ virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
+ const nsDisplayListSet& aLists) override;
+
+ void Destroy(DestroyContext&) override;
+
+ bool UpdateWebRenderCanvasData(nsDisplayListBuilder* aBuilder,
+ WebRenderCanvasData* aCanvasData);
+
+ /* get the size of the canvas's image */
+ nsIntSize GetCanvasSize() const;
+
+ virtual nscoord GetMinISize(gfxContext* aRenderingContext) override;
+ virtual nscoord GetPrefISize(gfxContext* aRenderingContext) override;
+ virtual mozilla::IntrinsicSize GetIntrinsicSize() override;
+ mozilla::AspectRatio GetIntrinsicRatio() const override;
+
+ void UnionChildOverflow(mozilla::OverflowAreas& aOverflowAreas) override;
+
+ SizeComputationResult ComputeSize(
+ gfxContext* aRenderingContext, mozilla::WritingMode aWM,
+ const mozilla::LogicalSize& aCBSize, nscoord aAvailableISize,
+ const mozilla::LogicalSize& aMargin,
+ const mozilla::LogicalSize& aBorderPadding,
+ const mozilla::StyleSizeOverrides& aSizeOverrides,
+ mozilla::ComputeSizeFlags aFlags) override;
+
+ virtual void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
+ const ReflowInput& aReflowInput,
+ nsReflowStatus& aStatus) override;
+
+#ifdef ACCESSIBILITY
+ virtual mozilla::a11y::AccType AccessibleType() override;
+#endif
+
+ 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();
+ }
+
+ // Return the ::-moz-html-canvas-content anonymous box.
+ void AppendDirectlyOwnedAnonBoxes(nsTArray<OwnedAnonBox>& aResult) override;
+
+ protected:
+ virtual ~nsHTMLCanvasFrame();
+};
+
+#endif /* nsHTMLCanvasFrame_h___ */