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 case MediaVolumeSliderPart:
79 return AccessibilityOrientationVertical;
80
81 default:
82 return AccessibilityOrientationHorizontal;
83 }
84 }
85
addChildren()86 void AccessibilitySlider::addChildren()
87 {
88 ASSERT(!m_haveChildren);
89
90 m_haveChildren = true;
91
92 AXObjectCache* cache = m_renderer->document()->axObjectCache();
93
94 AccessibilitySliderThumb* thumb = static_cast<AccessibilitySliderThumb*>(cache->getOrCreate(SliderThumbRole));
95 thumb->setParentObject(this);
96
97 // Before actually adding the value indicator to the hierarchy,
98 // allow the platform to make a final decision about it.
99 if (thumb->accessibilityIsIgnored())
100 cache->remove(thumb->axObjectID());
101 else
102 m_children.append(thumb);
103 }
104
getAttribute(const QualifiedName & attribute) const105 const AtomicString& AccessibilitySlider::getAttribute(const QualifiedName& attribute) const
106 {
107 return element()->getAttribute(attribute);
108 }
109
elementAccessibilityHitTest(const IntPoint & point) const110 AccessibilityObject* AccessibilitySlider::elementAccessibilityHitTest(const IntPoint& point) const
111 {
112 if (m_children.size()) {
113 ASSERT(m_children.size() == 1);
114 if (m_children[0]->elementRect().contains(point))
115 return m_children[0].get();
116 }
117
118 return axObjectCache()->getOrCreate(m_renderer);
119 }
120
accessibilityIsIgnored() const121 bool AccessibilitySlider::accessibilityIsIgnored() const
122 {
123 AccessibilityObjectInclusion decision = accessibilityIsIgnoredBase();
124 if (decision == IncludeObject)
125 return false;
126 if (decision == IgnoreObject)
127 return true;
128
129 return false;
130 }
131
valueForRange() const132 float AccessibilitySlider::valueForRange() const
133 {
134 return element()->value().toFloat();
135 }
136
maxValueForRange() const137 float AccessibilitySlider::maxValueForRange() const
138 {
139 return static_cast<float>(element()->maximum());
140 }
141
minValueForRange() const142 float AccessibilitySlider::minValueForRange() const
143 {
144 return static_cast<float>(element()->minimum());
145 }
146
setValue(const String & value)147 void AccessibilitySlider::setValue(const String& value)
148 {
149 HTMLInputElement* input = element();
150
151 if (input->value() == value)
152 return;
153
154 input->setValue(value);
155
156 // Fire change event manually, as RenderSlider::setValueForPosition does.
157 input->dispatchFormControlChangeEvent();
158 }
159
element() const160 HTMLInputElement* AccessibilitySlider::element() const
161 {
162 return static_cast<HTMLInputElement*>(m_renderer->node());
163 }
164
165
AccessibilitySliderThumb()166 AccessibilitySliderThumb::AccessibilitySliderThumb()
167 : m_parentSlider(0)
168 {
169 }
170
create()171 PassRefPtr<AccessibilitySliderThumb> AccessibilitySliderThumb::create()
172 {
173 return adoptRef(new AccessibilitySliderThumb());
174 }
175
elementRect() const176 IntRect AccessibilitySliderThumb::elementRect() const
177 {
178 if (!m_parentSlider->renderer())
179 return IntRect();
180
181 IntRect intRect = toRenderSlider(m_parentSlider->renderer())->thumbRect();
182 FloatQuad floatQuad = m_parentSlider->renderer()->localToAbsoluteQuad(FloatRect(intRect));
183
184 return floatQuad.enclosingBoundingBox();
185 }
186
size() const187 IntSize AccessibilitySliderThumb::size() const
188 {
189 return elementRect().size();
190 }
191
accessibilityIsIgnored() const192 bool AccessibilitySliderThumb::accessibilityIsIgnored() const
193 {
194 AccessibilityObjectInclusion decision = accessibilityPlatformIncludesObject();
195 if (decision == IncludeObject)
196 return false;
197 if (decision == IgnoreObject)
198 return true;
199
200 return false;
201 }
202
203 } // namespace WebCore
204