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#include "config.h"
30#include "AccessibilityScrollbar.h"
31
32#include "AXObjectCache.h"
33#include "FrameView.h"
34#include "ScrollView.h"
35#include "Scrollbar.h"
36
37namespace WebCore {
38
39AccessibilityScrollbar::AccessibilityScrollbar(Scrollbar* scrollbar)
40    : m_scrollbar(scrollbar)
41{
42    ASSERT(scrollbar);
43}
44
45PassRefPtr<AccessibilityScrollbar> AccessibilityScrollbar::create(Scrollbar* scrollbar)
46{
47    return adoptRef(new AccessibilityScrollbar(scrollbar));
48}
49
50LayoutRect AccessibilityScrollbar::elementRect() const
51{
52    if (!m_scrollbar)
53        return LayoutRect();
54
55    return m_scrollbar->frameRect();
56}
57
58Document* AccessibilityScrollbar::document() const
59{
60    AccessibilityObject* parent = parentObject();
61    if (!parent)
62        return 0;
63    return parent->document();
64}
65
66AccessibilityOrientation AccessibilityScrollbar::orientation() const
67{
68    if (!m_scrollbar)
69        return AccessibilityOrientationHorizontal;
70
71    if (m_scrollbar->orientation() == HorizontalScrollbar)
72        return AccessibilityOrientationHorizontal;
73    if (m_scrollbar->orientation() == VerticalScrollbar)
74        return AccessibilityOrientationVertical;
75
76    return AccessibilityOrientationHorizontal;
77}
78
79bool AccessibilityScrollbar::isEnabled() const
80{
81    if (!m_scrollbar)
82        return false;
83    return m_scrollbar->enabled();
84}
85
86float AccessibilityScrollbar::valueForRange() const
87{
88    if (!m_scrollbar)
89        return 0;
90
91    return m_scrollbar->currentPos() / m_scrollbar->maximum();
92}
93
94void AccessibilityScrollbar::setValue(float value)
95{
96    if (!m_scrollbar)
97        return;
98
99    if (!m_scrollbar->scrollableArea())
100        return;
101
102    float newValue = value * m_scrollbar->maximum();
103    m_scrollbar->scrollableArea()->scrollToOffsetWithoutAnimation(m_scrollbar->orientation(), newValue);
104}
105
106} // namespace WebCore
107