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 "core/accessibility/AXScrollbar.h"
31
32 #include "platform/scroll/ScrollView.h"
33
34 namespace blink {
35
AXScrollbar(Scrollbar * scrollbar)36 AXScrollbar::AXScrollbar(Scrollbar* scrollbar)
37 : m_scrollbar(scrollbar)
38 {
39 ASSERT(scrollbar);
40 }
41
detachFromParent()42 void AXScrollbar::detachFromParent()
43 {
44 m_scrollbar = nullptr;
45 AXMockObject::detachFromParent();
46 }
47
create(Scrollbar * scrollbar)48 PassRefPtr<AXScrollbar> AXScrollbar::create(Scrollbar* scrollbar)
49 {
50 return adoptRef(new AXScrollbar(scrollbar));
51 }
52
elementRect() const53 LayoutRect AXScrollbar::elementRect() const
54 {
55 if (!m_scrollbar)
56 return LayoutRect();
57
58 return m_scrollbar->frameRect();
59 }
60
document() const61 Document* AXScrollbar::document() const
62 {
63 AXObject* parent = parentObject();
64 if (!parent)
65 return 0;
66 return parent->document();
67 }
68
orientation() const69 AccessibilityOrientation AXScrollbar::orientation() const
70 {
71 if (!m_scrollbar)
72 return AccessibilityOrientationHorizontal;
73
74 if (m_scrollbar->orientation() == HorizontalScrollbar)
75 return AccessibilityOrientationHorizontal;
76 if (m_scrollbar->orientation() == VerticalScrollbar)
77 return AccessibilityOrientationVertical;
78
79 return AccessibilityOrientationHorizontal;
80 }
81
isEnabled() const82 bool AXScrollbar::isEnabled() const
83 {
84 if (!m_scrollbar)
85 return false;
86 return m_scrollbar->enabled();
87 }
88
valueForRange() const89 float AXScrollbar::valueForRange() const
90 {
91 if (!m_scrollbar)
92 return 0;
93
94 return m_scrollbar->currentPos() / m_scrollbar->maximum();
95 }
96
setValue(float value)97 void AXScrollbar::setValue(float value)
98 {
99 if (!m_scrollbar)
100 return;
101
102 if (!m_scrollbar->scrollableArea())
103 return;
104
105 float newValue = value * m_scrollbar->maximum();
106 m_scrollbar->scrollableArea()->scrollToOffsetWithoutAnimation(m_scrollbar->orientation(), newValue);
107 }
108
109 } // namespace blink
110