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 * in the documentation and/or other materials provided with the

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 * this software without specific prior written permission.

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#ifndef FramelessScrollView_h

#define FramelessScrollView_h

#include "ScrollView.h"

namespace WebCore {

    class FramelessScrollViewClient;

    class PlatformKeyboardEvent;

    class PlatformMouseEvent;

    class PlatformWheelEvent;

    // A FramelessScrollView is a ScrollView that can be used to render custom

    // content, which does not have an associated Frame.

    //

    // NOTE: It may be better to just develop a custom subclass of Widget that

    // can have scroll bars for this instead of trying to reuse ScrollView.

    //

    class FramelessScrollView : public ScrollView {

    public:

        FramelessScrollView() : m_client(0) {}

        ~FramelessScrollView();

        FramelessScrollViewClient* client() const { return m_client; }

        void setClient(FramelessScrollViewClient* client) { m_client = client; }

        // Event handlers that subclasses must implement.

        virtual bool handleMouseDownEvent(const PlatformMouseEvent&) = 0;

        virtual bool handleMouseMoveEvent(const PlatformMouseEvent&) = 0;

        virtual bool handleMouseReleaseEvent(const PlatformMouseEvent&) = 0;

        virtual bool handleWheelEvent(const PlatformWheelEvent&) = 0;

        virtual bool handleKeyEvent(const PlatformKeyboardEvent&) = 0;

        // ScrollbarClient public methods:

        virtual void invalidateScrollbarRect(Scrollbar*, const IntRect&);

        virtual bool isActive() const;

        // Widget public methods:

        virtual void invalidateRect(const IntRect&);

        // ScrollView public methods:

        virtual HostWindow* hostWindow() const;

        virtual IntRect windowClipRect(bool clipToContents = true) const;

    protected:

        // ScrollView protected methods:

        virtual void paintContents(GraphicsContext*, const IntRect& damageRect);

        virtual void contentsResized();

        virtual void visibleContentsResized();

    private:

        FramelessScrollViewClient* m_client;

    };

} // namespace WebCore

#endif