third_party/WebKit/Source/platform/scroll/ScrollbarThemeMacOverlayAPI.h

/*
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#ifndef ScrollbarThemeMacOverlayAPI_h
#define ScrollbarThemeMacOverlayAPI_h

#include "platform/scroll/ScrollbarThemeMacCommon.h"

typedef id ScrollbarPainter;

namespace blink {

class PLATFORM_EXPORT ScrollbarThemeMacOverlayAPI : public ScrollbarThemeMacCommon {
public:
    void updateEnabledState(const ScrollbarThemeClient*) override;
    int scrollbarThickness(ScrollbarControlSize = RegularScrollbar) override;
    bool usesOverlayScrollbars() const override;
    void updateScrollbarOverlayStyle(const ScrollbarThemeClient*) override;
    ScrollbarButtonsPlacement buttonsPlacement() const override;

    void registerScrollbar(ScrollbarThemeClient*) override;
    void unregisterScrollbar(ScrollbarThemeClient*) override;

    void setNewPainterForScrollbar(ScrollbarThemeClient*, ScrollbarPainter);
    ScrollbarPainter painterForScrollbar(const ScrollbarThemeClient*);

    void paintTrackBackground(GraphicsContext*, const ScrollbarThemeClient*, const IntRect&) override;
    void paintThumb(GraphicsContext*, const ScrollbarThemeClient*, const IntRect&) override;

protected:
    IntRect trackRect(const ScrollbarThemeClient*, bool painting = false) override;
    IntRect backButtonRect(const ScrollbarThemeClient*, ScrollbarPart, bool painting = false) override;
    IntRect forwardButtonRect(const ScrollbarThemeClient*, ScrollbarPart, bool painting = false) override;

    bool hasButtons(const ScrollbarThemeClient*) override { return false; }
    bool hasThumb(const ScrollbarThemeClient*) override;

    int minimumThumbLength(const ScrollbarThemeClient*) override;
};

}

#endif