Source/platform/exported/WebScrollbarThemeGeometryNative.h

/*
 * Copyright (C) 2012 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 *
 * 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 AND ITS CONTRIBUTORS "AS IS" AND ANY
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 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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#ifndef WebScrollbarThemeGeometryNative_h
#define WebScrollbarThemeGeometryNative_h

#include "platform/PlatformExport.h"
#include "public/platform/WebRect.h"
#include "public/platform/WebScrollbarThemeGeometry.h"
#include "wtf/PassOwnPtr.h"

namespace blink {

class ScrollbarTheme;
class WebScrollbar;

class PLATFORM_EXPORT WebScrollbarThemeGeometryNative : public WebScrollbarThemeGeometry {
public:
    static PassOwnPtr<WebScrollbarThemeGeometryNative> create(ScrollbarTheme*);

    // WebScrollbarThemeGeometry overrides
    virtual WebScrollbarThemeGeometryNative* clone() const override;
    virtual int thumbPosition(WebScrollbar*) override;
    virtual int thumbLength(WebScrollbar*) override;
    virtual int trackPosition(WebScrollbar*) override;
    virtual int trackLength(WebScrollbar*) override;
    virtual bool hasButtons(WebScrollbar*) override;
    virtual bool hasThumb(WebScrollbar*) override;
    virtual WebRect trackRect(WebScrollbar*) override;
    virtual WebRect thumbRect(WebScrollbar*) override;
    virtual int minimumThumbLength(WebScrollbar*) override;
    virtual int scrollbarThickness(WebScrollbar*) override;
    virtual WebRect backButtonStartRect(WebScrollbar*) override;
    virtual WebRect backButtonEndRect(WebScrollbar*) override;
    virtual WebRect forwardButtonStartRect(WebScrollbar*) override;
    virtual WebRect forwardButtonEndRect(WebScrollbar*) override;
    virtual WebRect constrainTrackRectToTrackPieces(WebScrollbar*, const WebRect&) override;
    virtual void splitTrack(WebScrollbar*, const WebRect& track, WebRect& startTrack, WebRect& thumb, WebRect& endTrack) override;

private:
    explicit WebScrollbarThemeGeometryNative(ScrollbarTheme*);

    // The theme is not owned by this class. It is assumed that the theme is a
    // static pointer and its lifetime is essentially infinite. Only thread-safe
    // functions on the theme can be called by this theme.
    ScrollbarTheme* m_theme;
};

} // namespace blink

#endif