/*
 * Copyright (C) 2013 Google Inc. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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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