1/*
2 * Copyright (C) 2010, 2015 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 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
45Ref<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 nullptr;
63 return parent->document();
64}
65
66AccessibilityOrientation AccessibilityScrollbar::orientation() const
67{
68 // ARIA 1.1 Elements with the role scrollbar have an implicit aria-orientation value of vertical.
69 if (!m_scrollbar)
70 return AccessibilityOrientation::Vertical;
71
72 if (m_scrollbar->orientation() == HorizontalScrollbar)
73 return AccessibilityOrientation::Horizontal;
74 if (m_scrollbar->orientation() == VerticalScrollbar)
75 return AccessibilityOrientation::Vertical;
76
77 return AccessibilityOrientation::Vertical;
78}
79
80bool AccessibilityScrollbar::isEnabled() const
81{
82 if (!m_scrollbar)
83 return false;
84 return m_scrollbar->enabled();
85}
86
87float AccessibilityScrollbar::valueForRange() const
88{
89 if (!m_scrollbar)
90 return 0;
91
92 return m_scrollbar->currentPos() / m_scrollbar->maximum();
93}
94
95void AccessibilityScrollbar::setValue(float value)
96{
97 if (!m_scrollbar)
98 return;
99
100 float newValue = value * m_scrollbar->maximum();
101 m_scrollbar->scrollableArea().scrollToOffsetWithoutAnimation(m_scrollbar->orientation(), newValue);
102}
103
104} // namespace WebCore
105