The Tor Browser: layout/generic/nsHTMLCanvasFrame.h@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 /* rendering object for the HTML <canvas> element */

     8 #ifndef nsHTMLCanvasFrame_h___

     9 #define nsHTMLCanvasFrame_h___

    11 #include "mozilla/Attributes.h"

    12 #include "nsContainerFrame.h"

    13 #include "FrameLayerBuilder.h"

    15 namespace mozilla {

    16 namespace layers {

    17 class Layer;

    18 class LayerManager;

    19 }

    20 }

    22 class nsPresContext;

    23 class nsDisplayItem;

    24 class nsAString;

    26 nsIFrame* NS_NewHTMLCanvasFrame (nsIPresShell* aPresShell, nsStyleContext* aContext);

    28 class nsHTMLCanvasFrame : public nsContainerFrame

    29 {

    30 public:

    31   typedef mozilla::layers::Layer Layer;

    32   typedef mozilla::layers::LayerManager LayerManager;

    33   typedef mozilla::ContainerLayerParameters ContainerLayerParameters;

    35   NS_DECL_QUERYFRAME_TARGET(nsHTMLCanvasFrame)

    36   NS_DECL_QUERYFRAME

    37   NS_DECL_FRAMEARENA_HELPERS

    39   nsHTMLCanvasFrame(nsStyleContext* aContext) : nsContainerFrame(aContext) {}

    41   virtual void Init(nsIContent* aContent,

    42                     nsIFrame*   aParent,

    43                     nsIFrame*   aPrevInFlow) MOZ_OVERRIDE;

    45   virtual void BuildDisplayList(nsDisplayListBuilder*   aBuilder,

    46                                 const nsRect&           aDirtyRect,

    47                                 const nsDisplayListSet& aLists) MOZ_OVERRIDE;

    49   already_AddRefed<Layer> BuildLayer(nsDisplayListBuilder* aBuilder,

    50                                      LayerManager* aManager,

    51                                      nsDisplayItem* aItem,

    52                                      const ContainerLayerParameters& aContainerParameters);

    54   /* get the size of the canvas's image */

    55   nsIntSize GetCanvasSize();

    57   virtual nscoord GetMinWidth(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;

    58   virtual nscoord GetPrefWidth(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;

    59   virtual nsSize GetIntrinsicRatio() MOZ_OVERRIDE;

    61   virtual nsSize ComputeSize(nsRenderingContext *aRenderingContext,

    62                              nsSize aCBSize, nscoord aAvailableWidth,

    63                              nsSize aMargin, nsSize aBorder, nsSize aPadding,

    64                              uint32_t aFlags) MOZ_OVERRIDE;

    66   virtual nsresult Reflow(nsPresContext*           aPresContext,

    67                           nsHTMLReflowMetrics&     aDesiredSize,

    68                           const nsHTMLReflowState& aReflowState,

    69                           nsReflowStatus&          aStatus) MOZ_OVERRIDE;

    71   nsRect GetInnerArea() const;

    73 #ifdef ACCESSIBILITY

    74   virtual mozilla::a11y::AccType AccessibleType() MOZ_OVERRIDE;

    75 #endif

    77   virtual nsIAtom* GetType() const MOZ_OVERRIDE;

    79   virtual bool IsFrameOfType(uint32_t aFlags) const MOZ_OVERRIDE

    80   {

    81     return nsSplittableFrame::IsFrameOfType(aFlags & ~(nsIFrame::eReplaced));

    82   }

    84 #ifdef DEBUG_FRAME_DUMP

    85   virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE;

    86 #endif

    88   // Inserted child content gets its frames parented by our child block

    89   virtual nsIFrame* GetContentInsertionFrame() MOZ_OVERRIDE {

    90     return GetFirstPrincipalChild()->GetContentInsertionFrame();

    91   }

    93 protected:

    94   virtual ~nsHTMLCanvasFrame();

    96   nscoord GetContinuationOffset(nscoord* aWidth = 0) const;

    98   nsMargin mBorderPadding;

    99 };

   101 #endif /* nsHTMLCanvasFrame_h___ */

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