1/*
2 * Copyright (C) 2010 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1.  Redistributions of source code must retain the above copyright
9 *     notice, this list of conditions and the following disclaimer.
10 * 2.  Redistributions in binary form must reproduce the above copyright
11 *     notice, this list of conditions and the following disclaimer in the
12 *     documentation and/or other materials provided with the distribution.
13 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
14 *     its contributors may be used to endorse or promote products derived
15 *     from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#ifndef AccessibilityScrollbar_h
30#define AccessibilityScrollbar_h
31
32#include "AccessibilityObject.h"
33
34namespace WebCore {
35
36class Scrollbar;
37
38class AccessibilityScrollbar : public AccessibilityObject {
39public:
40    static PassRefPtr<AccessibilityScrollbar> create();
41
42    void setScrollbar(Scrollbar* scrollbar) { m_scrollbar = scrollbar; }
43
44    virtual AccessibilityRole roleValue() const { return ScrollBarRole; }
45
46    virtual float valueForRange() const;
47
48private:
49    AccessibilityScrollbar();
50
51    virtual bool accessibilityIsIgnored() const { return false; }
52
53    // These should never be reached since the AccessibilityScrollbar is not part of
54    // the accessibility tree.
55    virtual IntSize size() const { ASSERT_NOT_REACHED(); return IntSize(); }
56    virtual IntRect elementRect() const { ASSERT_NOT_REACHED(); return IntRect(); }
57    virtual AccessibilityObject* parentObject() const { ASSERT_NOT_REACHED(); return 0; }
58
59    Scrollbar* m_scrollbar;
60};
61
62} // namespace WebCore
63
64#endif // AccessibilityScrollbar_h
65