1 files changed, 98 insertions, 0 deletions
diff --git a/layout/generic/nsHTMLCanvasFrame.h b/layout/generic/nsHTMLCanvasFrame.h
new file mode 100644
index 0000000000..40a81a205b
--- /dev/null
+++ b/layout/generic/nsHTMLCanvasFrame.h
@@ -0,0 +1,98 @@
+/* -*- 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___ */