sky/engine/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
 * 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 OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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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 Scrollbar;
class WebScrollbar;

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

    // WebScrollbarThemeGeometry overrides
    virtual WebScrollbarThemeGeometryNative* clone() const OVERRIDE;
    virtual int thumbPosition() OVERRIDE;
    virtual int thumbLength() OVERRIDE;
    virtual int trackPosition() OVERRIDE;
    virtual int trackLength() OVERRIDE;
    virtual WebRect trackRect() OVERRIDE;
    virtual WebRect thumbRect() OVERRIDE;
    virtual int minimumThumbLength() OVERRIDE;
    virtual int scrollbarThickness() OVERRIDE;
    virtual void splitTrack(const WebRect& track, WebRect& startTrack, WebRect& thumb, WebRect& endTrack) OVERRIDE;

private:
    explicit WebScrollbarThemeGeometryNative(Scrollbar*);

    // 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.
    Scrollbar* m_scrollbar;
};

} // namespace blink

#endif