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1 /* | 1 /* |
2 * Copyright (C) 2012, Google Inc. All rights reserved. | 2 * Copyright (C) 2012, Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
6 * are met: | 6 * are met: |
7 * | 7 * |
8 * 1. Redistributions of source code must retain the above copyright | 8 * 1. Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * 2. Redistributions in binary form must reproduce the above copyright | 10 * 2. Redistributions in binary form must reproduce the above copyright |
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35 #include "core/html/HTMLDListElement.h" | 35 #include "core/html/HTMLDListElement.h" |
36 #include "core/html/HTMLFieldSetElement.h" | 36 #include "core/html/HTMLFieldSetElement.h" |
37 #include "core/html/HTMLFrameElementBase.h" | 37 #include "core/html/HTMLFrameElementBase.h" |
38 #include "core/html/HTMLInputElement.h" | 38 #include "core/html/HTMLInputElement.h" |
39 #include "core/html/HTMLLabelElement.h" | 39 #include "core/html/HTMLLabelElement.h" |
40 #include "core/html/HTMLLegendElement.h" | 40 #include "core/html/HTMLLegendElement.h" |
41 #include "core/html/HTMLMediaElement.h" | 41 #include "core/html/HTMLMediaElement.h" |
42 #include "core/html/HTMLMeterElement.h" | 42 #include "core/html/HTMLMeterElement.h" |
43 #include "core/html/HTMLPlugInElement.h" | 43 #include "core/html/HTMLPlugInElement.h" |
44 #include "core/html/HTMLSelectElement.h" | 44 #include "core/html/HTMLSelectElement.h" |
45 #include "core/html/HTMLTableCellElement.h" | |
46 #include "core/html/HTMLTableElement.h" | |
47 #include "core/html/HTMLTableRowElement.h" | |
48 #include "core/html/HTMLTableSectionElement.h" | |
45 #include "core/html/HTMLTextAreaElement.h" | 49 #include "core/html/HTMLTextAreaElement.h" |
46 #include "core/html/parser/HTMLParserIdioms.h" | 50 #include "core/html/parser/HTMLParserIdioms.h" |
47 #include "core/html/shadow/MediaControlElements.h" | 51 #include "core/html/shadow/MediaControlElements.h" |
48 #include "core/layout/LayoutObject.h" | 52 #include "core/layout/LayoutObject.h" |
49 #include "modules/accessibility/AXObjectCacheImpl.h" | 53 #include "modules/accessibility/AXObjectCacheImpl.h" |
50 #include "platform/UserGestureIndicator.h" | 54 #include "platform/UserGestureIndicator.h" |
51 #include "wtf/text/StringBuilder.h" | 55 #include "wtf/text/StringBuilder.h" |
52 | 56 |
53 | 57 |
54 namespace blink { | 58 namespace blink { |
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176 return true; | 180 return true; |
177 | 181 |
178 // Ignore labels that are already referenced by a control's title UI element . | 182 // Ignore labels that are already referenced by a control's title UI element . |
179 AXObject* controlObject = correspondingControlForLabelElement(); | 183 AXObject* controlObject = correspondingControlForLabelElement(); |
180 if (controlObject && !controlObject->exposesTitleUIElement() && controlObjec t->isCheckboxOrRadio()) | 184 if (controlObject && !controlObject->exposesTitleUIElement() && controlObjec t->isCheckboxOrRadio()) |
181 return true; | 185 return true; |
182 | 186 |
183 return m_role == UnknownRole; | 187 return m_role == UnknownRole; |
184 } | 188 } |
185 | 189 |
190 static bool isListElement(Node* node) | |
191 { | |
192 return isHTMLUListElement(*node) || isHTMLOListElement(*node) || isHTMLDList Element(*node); | |
193 } | |
194 | |
195 static bool isPresentationRoleInTable(AXObject* parent, Node* child) | |
196 { | |
197 Node* parentNode = parent->node(); | |
198 if (!parentNode || !parentNode->isElementNode()) | |
199 return false; | |
200 | |
201 // AXTable determines the role as checking isTableXXX. | |
202 // If Table has explicit role including presentation, AXTable doesn't assign implicit Role | |
203 // to a whole Table. That's why we should check it based on node. | |
204 // Normal Table Tree is that | |
205 // cell(its role)-> tr(tr role)-> tfoot, tbody, thead(ignored role) -> table (table role). | |
206 // If table has presentation role, it will be like | |
207 // cell(group)-> tr(unknown) -> tfoot, tbody, thead(ignored) -> table(presen tation). | |
208 if (isHTMLTableCellElement(child) && isHTMLTableRowElement(*parentNode)) | |
209 return parent->hasInheritedPresentationRole(); | |
210 | |
211 if (isHTMLTableRowElement(child) && isHTMLTableSectionElement(*parentNode)) { | |
212 // Because TableSections have ignored role, presentation should be check ed with its parent node | |
213 AXObject* tableObject = parent->parentObject(); | |
214 Node* tableNode = tableObject->node(); | |
215 return isHTMLTableElement(tableNode) && tableObject->hasInheritedPresent ationRole(); | |
216 } | |
217 return false; | |
218 } | |
219 | |
220 static bool isRequiredOwnedElement(AXObject* parent, AccessibilityRole childRole , Node* childNode) | |
221 { | |
222 Node* parentNode = parent->node(); | |
223 if (!parentNode || !parentNode->isElementNode()) | |
224 return false; | |
225 | |
226 if (childRole == ListItemRole) | |
227 return isListElement(parentNode); | |
228 if (childRole == ListMarkerRole) | |
229 return isHTMLLIElement(*parentNode); | |
230 if (childRole == MenuItemCheckBoxRole || childRole == MenuItemRole || child Role == MenuItemRadioRole) | |
231 return isHTMLMenuElement(*parentNode); | |
232 | |
233 if (isHTMLTableCellElement(childNode)) | |
234 return isHTMLTableRowElement(*parentNode); | |
235 if (isHTMLTableRowElement(childNode)) | |
236 return isHTMLTableSectionElement(*parentNode); | |
dmazzoni
2015/04/01 15:27:55
Aren't the table section elements optional in html
je_julie(Not used)
2015/04/02 05:51:28
AFIK, table section is automatically generated fro
dmazzoni
2015/04/02 06:22:18
You're right that the layout tree for a table is a
| |
237 | |
238 // In case of ListboxRole and it's child, ListBoxOptionRole, | |
239 // Inheritance of presentation role is handled in AXListBoxOption | |
240 // Because ListBoxOption Role doesn't have any child. | |
241 // If it's just ignored because of presentation, we can't see any AX tree re lated to ListBoxOption. | |
242 return false; | |
243 } | |
244 | |
245 bool AXNodeObject::computeHasInheritedPresentationRole() const | |
246 { | |
247 // ARIA states if an item can get focus, it should not be presentational. | |
248 if (canSetFocusAttribute()) | |
249 return false; | |
250 | |
251 if (roleValue() == NoneRole || roleValue() == PresentationalRole) | |
dmazzoni
2015/04/01 15:27:55
This can be isPresentation()
je_julie(Not used)
2015/04/02 05:51:28
Done.
| |
252 return true; | |
253 | |
254 // http://www.w3.org/TR/wai-aria/complete#presentation | |
255 // ARIA spec says that the user agent MUST apply an inherited role of presen tation | |
256 // to any owned elements that do not have an explicit role defined. | |
257 if (ariaRoleAttribute() != UnknownRole) | |
258 return false; | |
259 | |
260 AXObject* parent = parentObject(); | |
261 if (!parent) | |
262 return false; | |
263 | |
264 Node* curNode = node(); | |
265 if (!parent->isPresentation() && !parent->hasInheritedPresentationRole() | |
266 && !isPresentationRoleInTable(parent, curNode)) | |
267 return false; | |
268 | |
269 // ARIA spec says that when a parent object is presentational and this objec t | |
270 // is a required owned element of that parent, then this object is also pres entational. | |
271 return isRequiredOwnedElement(parent, roleValue(), curNode); | |
272 } | |
273 | |
186 AccessibilityRole AXNodeObject::determineAccessibilityRoleUtil() | 274 AccessibilityRole AXNodeObject::determineAccessibilityRoleUtil() |
187 { | 275 { |
188 if (!node()) | 276 if (!node()) |
189 return UnknownRole; | 277 return UnknownRole; |
190 if (node()->isLink()) | 278 if (node()->isLink()) |
191 return LinkRole; | 279 return LinkRole; |
192 if (isHTMLButtonElement(*node())) | 280 if (isHTMLButtonElement(*node())) |
193 return buttonRoleType(); | 281 return buttonRoleType(); |
194 if (isHTMLDetailsElement(*node())) | 282 if (isHTMLDetailsElement(*node())) |
195 return DetailsRole; | 283 return DetailsRole; |
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1997 float range = maxValueForRange() - minValueForRange(); | 2085 float range = maxValueForRange() - minValueForRange(); |
1998 float value = valueForRange(); | 2086 float value = valueForRange(); |
1999 | 2087 |
2000 value += range * (percentChange / 100); | 2088 value += range * (percentChange / 100); |
2001 setValue(String::number(value)); | 2089 setValue(String::number(value)); |
2002 | 2090 |
2003 axObjectCache()->postNotification(node(), AXObjectCacheImpl::AXValueChanged) ; | 2091 axObjectCache()->postNotification(node(), AXObjectCacheImpl::AXValueChanged) ; |
2004 } | 2092 } |
2005 | 2093 |
2006 } // namespace blink | 2094 } // namespace blink |
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