/*
 * Copyright (C) 2008 Apple Inc. All Rights Reserved.
 *
 * 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.
 */

#ifndef LayoutScrollbarTheme_h
#define LayoutScrollbarTheme_h

#include "platform/scroll/ScrollbarTheme.h"

namespace blink {

class PlatformMouseEvent;

class LayoutScrollbarTheme final : public ScrollbarTheme {
public:
    ~LayoutScrollbarTheme() override { }

    int scrollbarThickness(ScrollbarControlSize controlSize) override { return ScrollbarTheme::theme().scrollbarThickness(controlSize); }

    WebScrollbarButtonsPlacement buttonsPlacement() const override { return ScrollbarTheme::theme().buttonsPlacement(); }

    void paintScrollCorner(GraphicsContext&, const DisplayItemClient&, const IntRect& cornerRect) override;

    bool shouldCenterOnThumb(const ScrollbarThemeClient& scrollbar, const PlatformMouseEvent& event) override { return ScrollbarTheme::theme().shouldCenterOnThumb(scrollbar, event); }
    bool shouldSnapBackToDragOrigin(const ScrollbarThemeClient& scrollbar, const PlatformMouseEvent& event) override { return ScrollbarTheme::theme().shouldSnapBackToDragOrigin(scrollbar, event); }

    double initialAutoscrollTimerDelay() override { return ScrollbarTheme::theme().initialAutoscrollTimerDelay(); }
    double autoscrollTimerDelay() override { return ScrollbarTheme::theme().autoscrollTimerDelay(); }

    void registerScrollbar(ScrollbarThemeClient& scrollbar) override { return ScrollbarTheme::theme().registerScrollbar(scrollbar); }
    void unregisterScrollbar(ScrollbarThemeClient& scrollbar) override { return ScrollbarTheme::theme().unregisterScrollbar(scrollbar); }

    int minimumThumbLength(const ScrollbarThemeClient&) override;

    void buttonSizesAlongTrackAxis(const ScrollbarThemeClient&, int& beforeSize, int& afterSize);

    static LayoutScrollbarTheme* layoutScrollbarTheme();

protected:
    bool hasButtons(const ScrollbarThemeClient&) override;
    bool hasThumb(const ScrollbarThemeClient&) override;

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

    void paintScrollbarBackground(GraphicsContext&, const ScrollbarThemeClient&) override;
    void paintTrackBackground(GraphicsContext&, const ScrollbarThemeClient&, const IntRect&) override;
    void paintTrackPiece(GraphicsContext&, const ScrollbarThemeClient&, const IntRect&, ScrollbarPart) override;
    void paintButton(GraphicsContext&, const ScrollbarThemeClient&, const IntRect&, ScrollbarPart) override;
    void paintThumb(GraphicsContext&, const ScrollbarThemeClient&, const IntRect&) override;
    void paintTickmarks(GraphicsContext&, const ScrollbarThemeClient&, const IntRect&) override;

    IntRect constrainTrackRectToTrackPieces(const ScrollbarThemeClient&, const IntRect&) override;
};

} // namespace blink

#endif // LayoutScrollbarTheme_h