1 | /* |
2 | * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). |
3 | * |
4 | * This library is free software; you can redistribute it and/or |
5 | * modify it under the terms of the GNU Library General Public |
6 | * License as published by the Free Software Foundation; either |
7 | * version 2 of the License, or (at your option) any later version. |
8 | * |
9 | * This library is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | * Library General Public License for more details. |
13 | * |
14 | * You should have received a copy of the GNU Library General Public License |
15 | * along with this library; see the file COPYING.LIB. If not, write to |
16 | * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
17 | * Boston, MA 02110-1301, USA. |
18 | * |
19 | */ |
20 | |
21 | #include "config.h" |
22 | #include "AccessibilityProgressIndicator.h" |
23 | |
24 | #include "AXObjectCache.h" |
25 | #include "FloatConversion.h" |
26 | #include "HTMLMeterElement.h" |
27 | #include "HTMLNames.h" |
28 | #include "HTMLProgressElement.h" |
29 | #include "LocalizedStrings.h" |
30 | #include "RenderMeter.h" |
31 | #include "RenderObject.h" |
32 | #include "RenderProgress.h" |
33 | |
34 | namespace WebCore { |
35 | |
36 | using namespace HTMLNames; |
37 | |
38 | AccessibilityProgressIndicator::AccessibilityProgressIndicator(RenderProgress* renderer) |
39 | : AccessibilityRenderObject(renderer) |
40 | { |
41 | } |
42 | |
43 | Ref<AccessibilityProgressIndicator> AccessibilityProgressIndicator::create(RenderProgress* renderer) |
44 | { |
45 | return adoptRef(*new AccessibilityProgressIndicator(renderer)); |
46 | } |
47 | |
48 | #if ENABLE(METER_ELEMENT) |
49 | AccessibilityProgressIndicator::AccessibilityProgressIndicator(RenderMeter* renderer) |
50 | : AccessibilityRenderObject(renderer) |
51 | { |
52 | } |
53 | |
54 | Ref<AccessibilityProgressIndicator> AccessibilityProgressIndicator::create(RenderMeter* renderer) |
55 | { |
56 | return adoptRef(*new AccessibilityProgressIndicator(renderer)); |
57 | } |
58 | #endif |
59 | |
60 | bool AccessibilityProgressIndicator::computeAccessibilityIsIgnored() const |
61 | { |
62 | return accessibilityIsIgnoredByDefault(); |
63 | } |
64 | |
65 | String AccessibilityProgressIndicator::valueDescription() const |
66 | { |
67 | // If the author has explicitly provided a value through aria-valuetext, use it. |
68 | String description = AccessibilityRenderObject::valueDescription(); |
69 | if (!description.isEmpty()) |
70 | return description; |
71 | |
72 | #if ENABLE(METER_ELEMENT) |
73 | if (!m_renderer->isMeter()) |
74 | return String(); |
75 | |
76 | HTMLMeterElement* meter = meterElement(); |
77 | if (!meter) |
78 | return String(); |
79 | |
80 | // The HTML spec encourages authors to include a textual representation of the meter's state in |
81 | // the element's contents. We'll fall back on that if there is not a more accessible alternative. |
82 | AccessibilityObject* axMeter = axObjectCache()->getOrCreate(meter); |
83 | if (is<AccessibilityNodeObject>(axMeter)) { |
84 | description = downcast<AccessibilityNodeObject>(axMeter)->accessibilityDescriptionForChildren(); |
85 | if (!description.isEmpty()) |
86 | return description; |
87 | } |
88 | |
89 | return meter->textContent(); |
90 | #endif |
91 | |
92 | return String(); |
93 | } |
94 | |
95 | float AccessibilityProgressIndicator::valueForRange() const |
96 | { |
97 | if (!m_renderer) |
98 | return 0.0; |
99 | |
100 | if (m_renderer->isProgress()) { |
101 | HTMLProgressElement* progress = progressElement(); |
102 | if (progress && progress->position() >= 0) |
103 | return narrowPrecisionToFloat(progress->value()); |
104 | } |
105 | |
106 | #if ENABLE(METER_ELEMENT) |
107 | if (m_renderer->isMeter()) { |
108 | if (HTMLMeterElement* meter = meterElement()) |
109 | return narrowPrecisionToFloat(meter->value()); |
110 | } |
111 | #endif |
112 | |
113 | // Indeterminate progress bar should return 0. |
114 | return 0.0; |
115 | } |
116 | |
117 | float AccessibilityProgressIndicator::maxValueForRange() const |
118 | { |
119 | if (!m_renderer) |
120 | return 0.0; |
121 | |
122 | if (m_renderer->isProgress()) { |
123 | if (HTMLProgressElement* progress = progressElement()) |
124 | return narrowPrecisionToFloat(progress->max()); |
125 | } |
126 | |
127 | #if ENABLE(METER_ELEMENT) |
128 | if (m_renderer->isMeter()) { |
129 | if (HTMLMeterElement* meter = meterElement()) |
130 | return narrowPrecisionToFloat(meter->max()); |
131 | } |
132 | #endif |
133 | |
134 | return 0.0; |
135 | } |
136 | |
137 | float AccessibilityProgressIndicator::minValueForRange() const |
138 | { |
139 | if (!m_renderer) |
140 | return 0.0; |
141 | |
142 | if (m_renderer->isProgress()) |
143 | return 0.0; |
144 | |
145 | #if ENABLE(METER_ELEMENT) |
146 | if (m_renderer->isMeter()) { |
147 | if (HTMLMeterElement* meter = meterElement()) |
148 | return narrowPrecisionToFloat(meter->min()); |
149 | } |
150 | #endif |
151 | |
152 | return 0.0; |
153 | } |
154 | |
155 | AccessibilityRole AccessibilityProgressIndicator::roleValue() const |
156 | { |
157 | #if ENABLE(METER_ELEMENT) |
158 | if (meterElement()) |
159 | return AccessibilityRole::Meter; |
160 | #endif |
161 | return AccessibilityRole::ProgressIndicator; |
162 | } |
163 | |
164 | HTMLProgressElement* AccessibilityProgressIndicator::progressElement() const |
165 | { |
166 | if (!is<RenderProgress>(*m_renderer)) |
167 | return nullptr; |
168 | |
169 | return downcast<RenderProgress>(*m_renderer).progressElement(); |
170 | } |
171 | |
172 | #if ENABLE(METER_ELEMENT) |
173 | HTMLMeterElement* AccessibilityProgressIndicator::meterElement() const |
174 | { |
175 | if (!is<RenderMeter>(*m_renderer)) |
176 | return nullptr; |
177 | |
178 | return downcast<RenderMeter>(*m_renderer).meterElement(); |
179 | } |
180 | |
181 | String AccessibilityProgressIndicator::gaugeRegionValueDescription() const |
182 | { |
183 | #if PLATFORM(COCOA) |
184 | if (!m_renderer || !m_renderer->isMeter()) |
185 | return String(); |
186 | |
187 | // Only expose this when the author has explicitly specified the following attributes. |
188 | if (!hasAttribute(lowAttr) && !hasAttribute(highAttr) && !hasAttribute(optimumAttr)) |
189 | return String(); |
190 | |
191 | if (HTMLMeterElement* element = meterElement()) { |
192 | switch (element->gaugeRegion()) { |
193 | case HTMLMeterElement::GaugeRegionOptimum: |
194 | return AXMeterGaugeRegionOptimumText(); |
195 | case HTMLMeterElement::GaugeRegionSuboptimal: |
196 | return AXMeterGaugeRegionSuboptimalText(); |
197 | case HTMLMeterElement::GaugeRegionEvenLessGood: |
198 | return AXMeterGaugeRegionLessGoodText(); |
199 | default: |
200 | break; |
201 | } |
202 | } |
203 | #endif |
204 | return String(); |
205 | } |
206 | #endif |
207 | |
208 | Element* AccessibilityProgressIndicator::element() const |
209 | { |
210 | if (m_renderer->isProgress()) |
211 | return progressElement(); |
212 | |
213 | #if ENABLE(METER_ELEMENT) |
214 | if (m_renderer->isMeter()) |
215 | return meterElement(); |
216 | #endif |
217 | |
218 | return AccessibilityObject::element(); |
219 | } |
220 | |
221 | } // namespace WebCore |
222 | |
223 | |