/*
 * 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 ScrollbarThemeChromium_h
#define ScrollbarThemeChromium_h

#include "ScrollbarThemeComposite.h"

namespace WebCore {

class PlatformMouseEvent;

// -----------------------------------------------------------------------------
// This class contains the Chromium scrollbar implementations for Windows and
// Linux. All of the symbols here in must be defined somewhere in the code and
// we manage the platform specific parts by linking in different, platform
// specific, files. Methods that we shared across platforms are implemented in
// ScrollbarThemeChromium.cpp
// -----------------------------------------------------------------------------
class ScrollbarThemeChromium : public ScrollbarThemeComposite {
public:
    ScrollbarThemeChromium();
    virtual ~ScrollbarThemeChromium();

    virtual int scrollbarThickness(ScrollbarControlSize = RegularScrollbar);

    virtual void themeChanged();
    
    virtual bool invalidateOnMouseEnterExit();

protected:
    virtual bool hasButtons(Scrollbar*) { return true; }
    virtual bool hasThumb(Scrollbar*);

    virtual IntRect backButtonRect(Scrollbar*, ScrollbarPart, bool painting = false);
    virtual IntRect forwardButtonRect(Scrollbar*, ScrollbarPart, bool painting = false);
    virtual IntRect trackRect(Scrollbar*, bool painting = false);

    virtual void paintScrollCorner(ScrollView*, GraphicsContext*, const IntRect&);
    virtual bool shouldCenterOnThumb(Scrollbar*, const PlatformMouseEvent&);

    virtual void paintTrackBackground(GraphicsContext*, Scrollbar*, const IntRect&);
    virtual void paintTrackPiece(GraphicsContext*, Scrollbar*, const IntRect&, ScrollbarPart);
    virtual void paintButton(GraphicsContext*, Scrollbar*, const IntRect&, ScrollbarPart);
    virtual void paintThumb(GraphicsContext*, Scrollbar*, const IntRect&);
    virtual void paintTickmarks(GraphicsContext*, Scrollbar*, const IntRect&);

private:
    IntSize buttonSize(Scrollbar*);

    int getThemeState(Scrollbar*, ScrollbarPart) const;
    int getThemeArrowState(Scrollbar*, ScrollbarPart) const;
    int getClassicThemeState(Scrollbar*, ScrollbarPart) const;
};

}
#endif