/*

 * Copyright (C) 2010 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.

 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of

 *     its contributors may be used to endorse or promote products derived

 *     from this software without specific prior written permission.

 *

 * 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

 * (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 AccessibilityScrollbar_h

#define AccessibilityScrollbar_h

#include "AccessibilityObject.h"

namespace WebCore {

class Scrollbar;

class AccessibilityScrollbar : public AccessibilityObject {

public:

    static PassRefPtr<AccessibilityScrollbar> create();

    void setScrollbar(Scrollbar* scrollbar) { m_scrollbar = scrollbar; }

    virtual AccessibilityRole roleValue() const { return ScrollBarRole; }

    virtual float valueForRange() const;

private:

    AccessibilityScrollbar();

    virtual bool accessibilityIsIgnored() const { return false; }

    // These should never be reached since the AccessibilityScrollbar is not part of

    // the accessibility tree.

    virtual IntSize size() const { ASSERT_NOT_REACHED(); return IntSize(); }

    virtual IntRect elementRect() const { ASSERT_NOT_REACHED(); return IntRect(); }

    virtual AccessibilityObject* parentObject() const { ASSERT_NOT_REACHED(); return 0; }

    Scrollbar* m_scrollbar;

};

} // namespace WebCore

#endif // AccessibilityScrollbar_h