1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
|
/*
* Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "config.h"
#include "AccessibilityProgressIndicator.h"
#include "AXObjectCache.h"
#include "FloatConversion.h"
#include "HTMLMeterElement.h"
#include "HTMLNames.h"
#include "HTMLProgressElement.h"
#include "RenderMeter.h"
#include "RenderObject.h"
#include "RenderProgress.h"
namespace WebCore {
using namespace HTMLNames;
AccessibilityProgressIndicator::AccessibilityProgressIndicator(RenderProgress* renderer)
: AccessibilityRenderObject(renderer)
{
}
Ref<AccessibilityProgressIndicator> AccessibilityProgressIndicator::create(RenderProgress* renderer)
{
return adoptRef(*new AccessibilityProgressIndicator(renderer));
}
#if ENABLE(METER_ELEMENT)
AccessibilityProgressIndicator::AccessibilityProgressIndicator(RenderMeter* renderer)
: AccessibilityRenderObject(renderer)
{
}
Ref<AccessibilityProgressIndicator> AccessibilityProgressIndicator::create(RenderMeter* renderer)
{
return adoptRef(*new AccessibilityProgressIndicator(renderer));
}
#endif
bool AccessibilityProgressIndicator::computeAccessibilityIsIgnored() const
{
return accessibilityIsIgnoredByDefault();
}
String AccessibilityProgressIndicator::valueDescription() const
{
// If the author has explicitly provided a value through aria-valuetext, use it.
String description = AccessibilityRenderObject::valueDescription();
if (!description.isEmpty())
return description;
#if ENABLE(METER_ELEMENT)
if (!m_renderer->isMeter())
return String();
HTMLMeterElement* meter = meterElement();
if (!meter)
return String();
// The HTML spec encourages authors to include a textual representation of the meter's state in
// the element's contents. We'll fall back on that if there is not a more accessible alternative.
AccessibilityObject* axMeter = axObjectCache()->getOrCreate(meter);
if (is<AccessibilityNodeObject>(axMeter)) {
description = downcast<AccessibilityNodeObject>(axMeter)->accessibilityDescriptionForChildren();
if (!description.isEmpty())
return description;
}
return meter->textContent();
#endif
return String();
}
float AccessibilityProgressIndicator::valueForRange() const
{
if (!m_renderer)
return 0.0;
if (m_renderer->isProgress()) {
HTMLProgressElement* progress = progressElement();
if (progress && progress->position() >= 0)
return narrowPrecisionToFloat(progress->value());
}
#if ENABLE(METER_ELEMENT)
if (m_renderer->isMeter()) {
if (HTMLMeterElement* meter = meterElement())
return narrowPrecisionToFloat(meter->value());
}
#endif
// Indeterminate progress bar should return 0.
return 0.0;
}
float AccessibilityProgressIndicator::maxValueForRange() const
{
if (!m_renderer)
return 0.0;
if (m_renderer->isProgress()) {
if (HTMLProgressElement* progress = progressElement())
return narrowPrecisionToFloat(progress->max());
}
#if ENABLE(METER_ELEMENT)
if (m_renderer->isMeter()) {
if (HTMLMeterElement* meter = meterElement())
return narrowPrecisionToFloat(meter->max());
}
#endif
return 0.0;
}
float AccessibilityProgressIndicator::minValueForRange() const
{
if (!m_renderer)
return 0.0;
if (m_renderer->isProgress())
return 0.0;
#if ENABLE(METER_ELEMENT)
if (m_renderer->isMeter()) {
if (HTMLMeterElement* meter = meterElement())
return narrowPrecisionToFloat(meter->min());
}
#endif
return 0.0;
}
HTMLProgressElement* AccessibilityProgressIndicator::progressElement() const
{
if (!is<RenderProgress>(*m_renderer))
return nullptr;
return downcast<RenderProgress>(*m_renderer).progressElement();
}
#if ENABLE(METER_ELEMENT)
HTMLMeterElement* AccessibilityProgressIndicator::meterElement() const
{
if (!is<RenderMeter>(*m_renderer))
return nullptr;
return downcast<RenderMeter>(*m_renderer).meterElement();
}
#endif
Element* AccessibilityProgressIndicator::element() const
{
if (m_renderer->isProgress())
return progressElement();
#if ENABLE(METER_ELEMENT)
if (m_renderer->isMeter())
return meterElement();
#endif
return AccessibilityObject::element();
}
} // namespace WebCore
|
