1 files changed, 110 insertions, 0 deletions
diff --git a/layout/generic/nsHTMLCanvasFrame.h b/layout/generic/nsHTMLCanvasFrame.h
new file mode 100644
index 000000000..e4235deae
--- /dev/null
+++ b/layout/generic/nsHTMLCanvasFrame.h
@@ -0,0 +1,110 @@
+/* -*- 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 nsRect&           aDirtyRect,
+                                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 nsSize 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___ */