WIP: <canvas> hit regions

Source/core/html/canvas/CanvasRenderingContext2D.h

 /*
  * Copyright (C) 2006, 2007, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 31 matching lines @@
 #include "wtf/HashMap.h"
 #include "wtf/Vector.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink { class WebLayer; }
 
 namespace WebCore {
 
 class CanvasImageSource;
 class CanvasGradient;
+class CanvasHitRegion;
+class CanvasHitRegionManager;
 class CanvasPattern;
 class CanvasStyle;
-class Path2D;
+struct DecodedHitRegionOptions;
 class Element;
 class ExceptionState;
 class FloatRect;
 class GraphicsContext;
 class HTMLCanvasElement;
 class HTMLImageElement;
 class HTMLVideoElement;
 class ImageBitmap;
 class ImageData;
+class Path2D;
 class TextMetrics;
 
 typedef WillBeHeapHashMap<String, RefPtrWillBeMember<MutableStylePropertySet> > MutableStylePropertyMap;
 
 class CanvasRenderingContext2D FINAL: public CanvasRenderingContext, public ScriptWrappable, public CanvasPathMethods {
 public:
     static PassOwnPtrWillBeRawPtr<CanvasRenderingContext2D> create(HTMLCanvasElement* canvas, const Canvas2DContextAttributes* attrs, bool usesCSSCompatibilityParseMode)
     {
         return adoptPtrWillBeNoop(new CanvasRenderingContext2D(canvas, attrs, usesCSSCompatibilityParseMode));
     }
@@ skipping 143 matching lines @@
     PassRefPtr<TextMetrics> measureText(const String& text);
 
     LineCap getLineCap() const { return state().m_lineCap; }
     LineJoin getLineJoin() const { return state().m_lineJoin; }
 
     bool imageSmoothingEnabled() const;
     void setImageSmoothingEnabled(bool);
 
     PassRefPtr<Canvas2DContextAttributes> getContextAttributes() const;
 
+    void addHitRegion(ExceptionState&);
+    void addHitRegion(const Dictionary& options, ExceptionState&);
+    void removeHitRegion(const String& id);
+    CanvasHitRegion* hitRegionAtPoint(const LayoutPoint&);
+
     void drawFocusIfNeeded(Element*);
     void drawFocusIfNeeded(Path2D*, Element*);
     bool drawCustomFocusRing(Element*);
 
     void loseContext();
     void restoreContext();
 
     virtual void trace(Visitor*) OVERRIDE;
 
 private:
@@ skipping 86 matching lines @@
 
     void clearCanvas();
     bool rectContainsTransformedRect(const FloatRect&, const FloatRect&) const;
 
     void inflateStrokeRect(FloatRect&) const;
 
     template<class T> void fullCanvasCompositedFill(const T&);
     template<class T> void fullCanvasCompositedStroke(const T&);
     template<class T> void fullCanvasCompositedDrawImage(T*, const FloatRect&, const FloatRect&, CompositeOperator);
 
+    void addHitRegionInternal(const DecodedHitRegionOptions&, ExceptionState&);
+
     void drawFocusIfNeededInternal(const Path&, Element*);
     bool focusRingCallIsValid(const Path&, Element*);
     void updateFocusRingAccessibility(const Path&, Element*);
     void drawFocusRing(const Path&);
 
     virtual bool is2d() const OVERRIDE { return true; }
     virtual bool isAccelerated() const OVERRIDE;
     virtual bool hasAlpha() const OVERRIDE { return m_hasAlpha; }
 
     virtual bool isTransformInvertible() const OVERRIDE { return state().m_invertibleCTM; }
 
     virtual blink::WebLayer* platformLayer() const OVERRIDE;
 
     WillBeHeapVector<OwnPtrWillBeMember<State> > m_stateStack;
+    OwnPtrWillBeMember<CanvasHitRegionManager> m_hitRegionManager;
     bool m_usesCSSCompatibilityParseMode;
     bool m_hasAlpha;
     bool m_isContextLost;
     bool m_contextRestorable;
     Canvas2DContextStorage m_storageMode;
     MutableStylePropertyMap m_fetchedFonts;
     unsigned m_tryRestoreContextAttemptCount;
     Timer<CanvasRenderingContext2D> m_dispatchContextLostEventTimer;
     Timer<CanvasRenderingContext2D> m_dispatchContextRestoredEventTimer;
     Timer<CanvasRenderingContext2D> m_tryRestoreContextEventTimer;
 };
 
 DEFINE_TYPE_CASTS(CanvasRenderingContext2D, CanvasRenderingContext, context, context->is2d(), context.is2d());
 
 } // namespace WebCore
 
 #endif