root/Source/core/frame/PinchViewport.h

INCLUDED FROM

/*
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 * this software without specific prior written permission.
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#ifndef PinchViewport_h
#define PinchViewport_h

#include "platform/geometry/IntSize.h"
#include "platform/graphics/GraphicsLayerClient.h"
#include "platform/scroll/ScrollableArea.h"
#include "public/platform/WebScrollbar.h"
#include "public/platform/WebSize.h"
#include "wtf/OwnPtr.h"
#include "wtf/PassOwnPtr.h"

namespace blink {
class WebLayerTreeView;
class WebScrollbarLayer;
}

namespace WebCore {

class FrameHost;
class GraphicsContext;
class GraphicsLayer;
class GraphicsLayerFactory;
class IntRect;
class IntSize;

class PinchViewport FINAL : public GraphicsLayerClient, public ScrollableArea {
public:
    PinchViewport(FrameHost&);
    virtual ~PinchViewport();

    void attachToLayerTree(GraphicsLayer*, GraphicsLayerFactory*);
    GraphicsLayer* rootGraphicsLayer()
    {
        return m_innerViewportContainerLayer.get();
    }

    void setLocation(const IntPoint&);
    void setSize(const IntSize&);

    void registerLayersWithTreeView(blink::WebLayerTreeView*) const;
    void clearLayersForTreeView(blink::WebLayerTreeView*) const;

    IntRect visibleRect() const { return m_visibleRect; }
private:
    // ScrollableArea implementation
    virtual bool isActive() const OVERRIDE { return false; }
    virtual int scrollSize(ScrollbarOrientation) const OVERRIDE;
    virtual bool isScrollCornerVisible() const OVERRIDE { return false; }
    virtual IntRect scrollCornerRect() const OVERRIDE { return IntRect(); }
    virtual IntPoint scrollPosition() const OVERRIDE { return visibleRect().location(); }
    virtual IntPoint minimumScrollPosition() const OVERRIDE;
    virtual IntPoint maximumScrollPosition() const OVERRIDE;
    virtual int visibleHeight() const OVERRIDE { return visibleRect().height(); };
    virtual int visibleWidth() const OVERRIDE { return visibleRect().width(); };
    virtual IntSize contentsSize() const OVERRIDE;
    virtual bool scrollbarsCanBeActive() const OVERRIDE { return false; }
    virtual IntRect scrollableAreaBoundingBox() const OVERRIDE;
    virtual bool userInputScrollable(ScrollbarOrientation) const OVERRIDE { return true; }
    virtual bool shouldPlaceVerticalScrollbarOnLeft() const OVERRIDE { return false; }
    virtual void invalidateScrollbarRect(Scrollbar*, const IntRect&) OVERRIDE;
    virtual void invalidateScrollCornerRect(const IntRect&) OVERRIDE { }
    virtual void setScrollOffset(const IntPoint&) OVERRIDE;
    virtual GraphicsLayer* layerForContainer() const OVERRIDE;
    virtual GraphicsLayer* layerForScrolling() const OVERRIDE;
    virtual GraphicsLayer* layerForHorizontalScrollbar() const OVERRIDE;
    virtual GraphicsLayer* layerForVerticalScrollbar() const OVERRIDE;

    // GraphicsLayerClient implementation.
    virtual void notifyAnimationStarted(const GraphicsLayer*, double monotonicTime) OVERRIDE;
    virtual void paintContents(const GraphicsLayer*, GraphicsContext&, GraphicsLayerPaintingPhase, const IntRect& inClip) OVERRIDE;
    virtual String debugName(const GraphicsLayer*) OVERRIDE;

    void setupScrollbar(blink::WebScrollbar::Orientation);

    FrameHost& m_frameHost;
    OwnPtr<GraphicsLayer> m_innerViewportContainerLayer;
    OwnPtr<GraphicsLayer> m_pageScaleLayer;
    OwnPtr<GraphicsLayer> m_innerViewportScrollLayer;
    OwnPtr<GraphicsLayer> m_overlayScrollbarHorizontal;
    OwnPtr<GraphicsLayer> m_overlayScrollbarVertical;
    OwnPtr<blink::WebScrollbarLayer> m_webOverlayScrollbarHorizontal;
    OwnPtr<blink::WebScrollbarLayer> m_webOverlayScrollbarVertical;

    IntRect m_visibleRect;
};

} // namespace WebCore

#endif // PinchViewport_h