Source/WebCore/platform/gtk/RenderThemeScrollbar.h

/*
 * Copyright (C) 2017 Igalia S.L.
 *
 * 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
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#pragma once

#if !USE(GTK4)

#include "RenderThemeGadget.h"
#include <gtk/gtk.h>

namespace WebCore {

class RenderThemeScrollbar {
    WTF_MAKE_FAST_ALLOCATED;
    WTF_MAKE_NONCOPYABLE(RenderThemeScrollbar);
public:
    enum class Type {
        VerticalScrollbarRight = 1,
        VerticalScrollbarLeft,
        HorizontalScrollbar,
        VerticalScrollIndicatorRight,
        VerticalScrollIndicatorLeft,
        HorizontalScrollIndicator,
    };
    static RenderThemeScrollbar& getOrCreate(Type);
    static void clearCache();

    enum class Mode { Full, Indicator };
    enum class VerticalPosition { Right, Left };
    RenderThemeScrollbar(GtkOrientation, Mode, VerticalPosition = VerticalPosition::Right);
    ~RenderThemeScrollbar() = default;

    RenderThemeGadget& scrollbar() const { return *m_scrollbar; }
    RenderThemeGadget& contents() const { return *m_contents; }
    RenderThemeGadget& slider() const { return *m_slider; }
    RenderThemeGadget& trough() const { return *m_contents->child(m_troughPosition); }
    RenderThemeGadget* stepper(RenderThemeScrollbarGadget::Steppers);

private:
    std::unique_ptr<RenderThemeGadget> m_scrollbar;
    std::unique_ptr<RenderThemeBoxGadget> m_contents;
    std::unique_ptr<RenderThemeGadget> m_slider;
    unsigned m_troughPosition;
    unsigned m_steppersPosition[4];
};

} // namespace WebCore

#endif // !USE(GTK4)