1 /*
2 * Copyright (C) 2009 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 "AccessibilitySlider.h"
31
32 #include "AXObjectCache.h"
33 #include "HTMLInputElement.h"
34 #include "HTMLNames.h"
35 #include "RenderObject.h"
36 #include "RenderSlider.h"
37
38 namespace WebCore {
39
40 using namespace HTMLNames;
41
AccessibilitySlider(RenderObject * renderer)42 AccessibilitySlider::AccessibilitySlider(RenderObject* renderer)
43 : AccessibilityRenderObject(renderer)
44 {
45 }
46
create(RenderObject * renderer)47 PassRefPtr<AccessibilitySlider> AccessibilitySlider::create(RenderObject* renderer)
48 {
49 return adoptRef(new AccessibilitySlider(renderer));
50 }
51
children()52 const AccessibilityObject::AccessibilityChildrenVector& AccessibilitySlider::children()
53 {
54 if (!m_haveChildren)
55 addChildren();
56 return m_children;
57 }
58
orientation() const59 AccessibilityOrientation AccessibilitySlider::orientation() const
60 {
61 // Default to horizontal in the unknown case.
62 if (!m_renderer)
63 return AccessibilityOrientationHorizontal;
64
65 RenderStyle* style = m_renderer->style();
66 if (!style)
67 return AccessibilityOrientationHorizontal;
68
69 ControlPart styleAppearance = style->appearance();
70 switch (styleAppearance) {
71 case SliderThumbHorizontalPart:
72 case SliderHorizontalPart:
73 case MediaSliderPart:
74 return AccessibilityOrientationHorizontal;
75
76 case SliderThumbVerticalPart:
77 case SliderVerticalPart:
78 return AccessibilityOrientationVertical;
79
80 default:
81 return AccessibilityOrientationHorizontal;
82 }
83 }
84
addChildren()85 void AccessibilitySlider::addChildren()
86 {
87 ASSERT(!m_haveChildren);
88
89 m_haveChildren = true;
90
91 AccessibilitySliderThumb* thumb = static_cast<AccessibilitySliderThumb*>(m_renderer->document()->axObjectCache()->getOrCreate(SliderThumbRole));
92 thumb->setParentObject(this);
93 m_children.append(thumb);
94 }
95
getAttribute(const QualifiedName & attribute) const96 const AtomicString& AccessibilitySlider::getAttribute(const QualifiedName& attribute) const
97 {
98 return element()->getAttribute(attribute);
99 }
100
valueForRange() const101 float AccessibilitySlider::valueForRange() const
102 {
103 return element()->value().toFloat();
104 }
105
maxValueForRange() const106 float AccessibilitySlider::maxValueForRange() const
107 {
108 return getAttribute(maxAttr).toFloat();
109 }
110
minValueForRange() const111 float AccessibilitySlider::minValueForRange() const
112 {
113 return getAttribute(minAttr).toFloat();
114 }
115
changeValue(float percentChange)116 void AccessibilitySlider::changeValue(float percentChange)
117 {
118 float range = maxValueForRange() - minValueForRange();
119 float value = valueForRange();
120
121 value += range * (percentChange / 100);
122 setValue(String::number(value));
123 }
124
setValue(const String & value)125 void AccessibilitySlider::setValue(const String& value)
126 {
127 HTMLInputElement* input = element();
128
129 if (input->value() == value)
130 return;
131
132 input->setValue(value);
133
134 // Fire change event manually, as RenderSlider::setValueForPosition does.
135 input->dispatchFormControlChangeEvent();
136 }
137
increment()138 void AccessibilitySlider::increment()
139 {
140 return changeValue(5);
141 }
142
decrement()143 void AccessibilitySlider::decrement()
144 {
145 return changeValue(-5);
146 }
147
element() const148 HTMLInputElement* AccessibilitySlider::element() const
149 {
150 return static_cast<HTMLInputElement*>(m_renderer->node());
151 }
152
153
AccessibilitySliderThumb()154 AccessibilitySliderThumb::AccessibilitySliderThumb()
155 : m_parentSlider(0)
156 {
157 }
158
create()159 PassRefPtr<AccessibilitySliderThumb> AccessibilitySliderThumb::create()
160 {
161 return adoptRef(new AccessibilitySliderThumb());
162 }
163
elementRect() const164 IntRect AccessibilitySliderThumb::elementRect() const
165 {
166 if (!m_parentSlider->renderer())
167 return IntRect();
168
169 IntRect intRect = toRenderSlider(m_parentSlider->renderer())->thumbRect();
170 FloatQuad floatQuad = m_parentSlider->renderer()->localToAbsoluteQuad(FloatRect(intRect));
171
172 return floatQuad.enclosingBoundingBox();
173 }
174
size() const175 IntSize AccessibilitySliderThumb::size() const
176 {
177 return elementRect().size();
178 }
179
180 } // namespace WebCore
181