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
37 namespace WebCore {
38
AccessibilityScrollbar(Scrollbar * scrollbar)39 AccessibilityScrollbar::AccessibilityScrollbar(Scrollbar* scrollbar)
40 : m_scrollbar(scrollbar)
41 , m_parent(0)
42 {
43 ASSERT(scrollbar);
44 }
45
create(Scrollbar * scrollbar)46 PassRefPtr<AccessibilityScrollbar> AccessibilityScrollbar::create(Scrollbar* scrollbar)
47 {
48 return adoptRef(new AccessibilityScrollbar(scrollbar));
49 }
50
elementRect() const51 IntRect AccessibilityScrollbar::elementRect() const
52 {
53 if (!m_scrollbar)
54 return IntRect();
55
56 return m_scrollbar->frameRect();
57 }
58
document() const59 Document* AccessibilityScrollbar::document() const
60 {
61 AccessibilityObject* parent = parentObject();
62 if (!parent)
63 return 0;
64 return parent->document();
65 }
66
orientation() const67 AccessibilityOrientation AccessibilityScrollbar::orientation() const
68 {
69 if (!m_scrollbar)
70 return AccessibilityOrientationHorizontal;
71
72 if (m_scrollbar->orientation() == HorizontalScrollbar)
73 return AccessibilityOrientationHorizontal;
74 if (m_scrollbar->orientation() == VerticalScrollbar)
75 return AccessibilityOrientationVertical;
76
77 return AccessibilityOrientationHorizontal;
78 }
79
isEnabled() const80 bool AccessibilityScrollbar::isEnabled() const
81 {
82 if (!m_scrollbar)
83 return false;
84 return m_scrollbar->enabled();
85 }
86
valueForRange() const87 float AccessibilityScrollbar::valueForRange() const
88 {
89 if (!m_scrollbar)
90 return 0;
91
92 return m_scrollbar->currentPos() / m_scrollbar->maximum();
93 }
94
setValue(float value)95 void AccessibilityScrollbar::setValue(float value)
96 {
97 if (!m_scrollbar)
98 return;
99
100 if (!m_scrollbar->scrollableArea())
101 return;
102
103 float newValue = value * m_scrollbar->maximum();
104 m_scrollbar->scrollableArea()->scrollToOffsetWithoutAnimation(m_scrollbar->orientation(), newValue);
105 }
106
107 } // namespace WebCore
108