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| 1 /* | |
| 2 * Copyright (C) 2008 Nuanti Ltd. | |
| 3 * Copyright (C) 2009 Jan Alonzo | |
| 4 * Copyright (C) 2009, 2010, 2011, 2012 Igalia S.L. | |
| 5 * Copyright (C) 2013 Samsung Electronics | |
| 6 * | |
| 7 * Portions from Mozilla a11y, copyright as follows: | |
| 8 * | |
| 9 * The Original Code is mozilla.org code. | |
| 10 * | |
| 11 * The Initial Developer of the Original Code is | |
| 12 * Sun Microsystems, Inc. | |
| 13 * Portions created by the Initial Developer are Copyright (C) 2002 | |
| 14 * the Initial Developer. All Rights Reserved. | |
| 15 * | |
| 16 * This library is free software; you can redistribute it and/or | |
| 17 * modify it under the terms of the GNU Library General Public | |
| 18 * License as published by the Free Software Foundation; either | |
| 19 * version 2 of the License, or (at your option) any later version. | |
| 20 * | |
| 21 * This library is distributed in the hope that it will be useful, | |
| 22 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 24 * Library General Public License for more details. | |
| 25 * | |
| 26 * You should have received a copy of the GNU Library General Public License | |
| 27 * along with this library; see the file COPYING.LIB. If not, write to | |
| 28 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, | |
| 29 * Boston, MA 02110-1301, USA. | |
| 30 */ | |
| 31 | |
| 32 #include "config.h" | |
| 33 #include "WebKitAccessibleWrapperAtk.h" | |
| 34 | |
| 35 #if HAVE(ACCESSIBILITY) | |
| 36 | |
| 37 #include "AXObjectCache.h" | |
| 38 #include "Document.h" | |
| 39 #include "Frame.h" | |
| 40 #include "FrameView.h" | |
| 41 #include "HTMLNames.h" | |
| 42 #include "HTMLTableElement.h" | |
| 43 #include "HostWindow.h" | |
| 44 #include "RenderObject.h" | |
| 45 #include "Settings.h" | |
| 46 #include "TextIterator.h" | |
| 47 #include "VisibleUnits.h" | |
| 48 #include "WebKitAccessibleHyperlink.h" | |
| 49 #include "WebKitAccessibleInterfaceAction.h" | |
| 50 #include "WebKitAccessibleInterfaceComponent.h" | |
| 51 #include "WebKitAccessibleInterfaceDocument.h" | |
| 52 #include "WebKitAccessibleInterfaceEditableText.h" | |
| 53 #include "WebKitAccessibleInterfaceHyperlinkImpl.h" | |
| 54 #include "WebKitAccessibleInterfaceHypertext.h" | |
| 55 #include "WebKitAccessibleInterfaceImage.h" | |
| 56 #include "WebKitAccessibleInterfaceSelection.h" | |
| 57 #include "WebKitAccessibleInterfaceTable.h" | |
| 58 #include "WebKitAccessibleInterfaceText.h" | |
| 59 #include "WebKitAccessibleInterfaceValue.h" | |
| 60 #include "WebKitAccessibleUtil.h" | |
| 61 #include "htmlediting.h" | |
| 62 #include <glib/gprintf.h> | |
| 63 | |
| 64 #if PLATFORM(GTK) | |
| 65 #include <gtk/gtk.h> | |
| 66 #endif | |
| 67 | |
| 68 using namespace WebCore; | |
| 69 | |
| 70 struct _WebKitAccessiblePrivate { | |
| 71 // Cached data for AtkObject. | |
| 72 CString accessibleName; | |
| 73 CString accessibleDescription; | |
| 74 | |
| 75 // Cached data for AtkAction. | |
| 76 CString actionName; | |
| 77 CString actionKeyBinding; | |
| 78 | |
| 79 // Cached data for AtkDocument. | |
| 80 CString documentLocale; | |
| 81 CString documentType; | |
| 82 CString documentEncoding; | |
| 83 CString documentURI; | |
| 84 | |
| 85 // Cached data for AtkImage. | |
| 86 CString imageDescription; | |
| 87 }; | |
| 88 | |
| 89 #define WEBKIT_ACCESSIBLE_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE((obj), W
EBKIT_TYPE_ACCESSIBLE, WebKitAccessiblePrivate)) | |
| 90 | |
| 91 static AccessibilityObject* fallbackObject() | |
| 92 { | |
| 93 // FIXME: An AXObjectCache with a Document is meaningless. | |
| 94 static AXObjectCache* fallbackCache = new AXObjectCache(0); | |
| 95 static AccessibilityObject* object = 0; | |
| 96 if (!object) { | |
| 97 // FIXME: using fallbackCache->getOrCreate(ListBoxOptionRole) is a hack | |
| 98 object = fallbackCache->getOrCreate(ListBoxOptionRole); | |
| 99 object->ref(); | |
| 100 } | |
| 101 | |
| 102 return object; | |
| 103 } | |
| 104 | |
| 105 static AccessibilityObject* core(WebKitAccessible* accessible) | |
| 106 { | |
| 107 if (!accessible) | |
| 108 return 0; | |
| 109 | |
| 110 return accessible->m_object; | |
| 111 } | |
| 112 | |
| 113 static AccessibilityObject* core(AtkObject* object) | |
| 114 { | |
| 115 if (!WEBKIT_IS_ACCESSIBLE(object)) | |
| 116 return 0; | |
| 117 | |
| 118 return core(WEBKIT_ACCESSIBLE(object)); | |
| 119 } | |
| 120 | |
| 121 static const gchar* webkitAccessibleGetName(AtkObject* object) | |
| 122 { | |
| 123 AccessibilityObject* coreObject = core(object); | |
| 124 if (!coreObject->isAccessibilityRenderObject()) | |
| 125 return cacheAndReturnAtkProperty(object, AtkCachedAccessibleName, coreOb
ject->stringValue()); | |
| 126 | |
| 127 if (coreObject->isFieldset()) { | |
| 128 AccessibilityObject* label = coreObject->titleUIElement(); | |
| 129 if (label) { | |
| 130 AtkObject* atkObject = label->wrapper(); | |
| 131 if (ATK_IS_TEXT(atkObject)) | |
| 132 return atk_text_get_text(ATK_TEXT(atkObject), 0, -1); | |
| 133 } | |
| 134 } | |
| 135 | |
| 136 if (coreObject->isControl()) { | |
| 137 AccessibilityObject* label = coreObject->correspondingLabelForControlEle
ment(); | |
| 138 if (label) { | |
| 139 AtkObject* atkObject = label->wrapper(); | |
| 140 if (ATK_IS_TEXT(atkObject)) | |
| 141 return atk_text_get_text(ATK_TEXT(atkObject), 0, -1); | |
| 142 } | |
| 143 | |
| 144 // Try text under the node. | |
| 145 String textUnder = coreObject->textUnderElement(); | |
| 146 if (textUnder.length()) | |
| 147 return cacheAndReturnAtkProperty(object, AtkCachedAccessibleName, te
xtUnder); | |
| 148 } | |
| 149 | |
| 150 if (coreObject->isImage() || coreObject->isInputImage()) { | |
| 151 Node* node = coreObject->node(); | |
| 152 if (node && node->isHTMLElement()) { | |
| 153 // Get the attribute rather than altText String so as not to fall ba
ck on title. | |
| 154 String alt = toHTMLElement(node)->getAttribute(HTMLNames::altAttr); | |
| 155 if (!alt.isEmpty()) | |
| 156 return cacheAndReturnAtkProperty(object, AtkCachedAccessibleName
, alt); | |
| 157 } | |
| 158 } | |
| 159 | |
| 160 // Fallback for the webArea object: just return the document's title. | |
| 161 if (coreObject->isWebArea()) { | |
| 162 Document* document = coreObject->document(); | |
| 163 if (document) | |
| 164 return cacheAndReturnAtkProperty(object, AtkCachedAccessibleName, do
cument->title()); | |
| 165 } | |
| 166 | |
| 167 // Nothing worked so far, try with the AccessibilityObject's | |
| 168 // title() before going ahead with stringValue(). | |
| 169 String axTitle = accessibilityTitle(coreObject); | |
| 170 if (!axTitle.isEmpty()) | |
| 171 return cacheAndReturnAtkProperty(object, AtkCachedAccessibleName, axTitl
e); | |
| 172 | |
| 173 return cacheAndReturnAtkProperty(object, AtkCachedAccessibleName, coreObject
->stringValue()); | |
| 174 } | |
| 175 | |
| 176 static const gchar* webkitAccessibleGetDescription(AtkObject* object) | |
| 177 { | |
| 178 AccessibilityObject* coreObject = core(object); | |
| 179 Node* node = 0; | |
| 180 if (coreObject->isAccessibilityRenderObject()) | |
| 181 node = coreObject->node(); | |
| 182 if (!node || !node->isHTMLElement() || coreObject->ariaRoleAttribute() != Un
knownRole) | |
| 183 return cacheAndReturnAtkProperty(object, AtkCachedAccessibleDescription,
accessibilityDescription(coreObject)); | |
| 184 | |
| 185 // atk_table_get_summary returns an AtkObject. We have no summary object, so
expose summary here. | |
| 186 if (coreObject->roleValue() == TableRole) { | |
| 187 String summary = static_cast<HTMLTableElement*>(node)->summary(); | |
| 188 if (!summary.isEmpty()) | |
| 189 return cacheAndReturnAtkProperty(object, AtkCachedAccessibleDescript
ion, summary); | |
| 190 } | |
| 191 | |
| 192 // The title attribute should be reliably available as the object's descript
on. | |
| 193 // We do not want to fall back on other attributes in its absence. See bug 2
5524. | |
| 194 String title = toHTMLElement(node)->title(); | |
| 195 if (!title.isEmpty()) | |
| 196 return cacheAndReturnAtkProperty(object, AtkCachedAccessibleDescription,
title); | |
| 197 | |
| 198 return cacheAndReturnAtkProperty(object, AtkCachedAccessibleDescription, acc
essibilityDescription(coreObject)); | |
| 199 } | |
| 200 | |
| 201 static void setAtkRelationSetFromCoreObject(AccessibilityObject* coreObject, Atk
RelationSet* relationSet) | |
| 202 { | |
| 203 if (coreObject->isFieldset()) { | |
| 204 AccessibilityObject* label = coreObject->titleUIElement(); | |
| 205 if (label) | |
| 206 atk_relation_set_add_relation_by_type(relationSet, ATK_RELATION_LABE
LLED_BY, label->wrapper()); | |
| 207 return; | |
| 208 } | |
| 209 | |
| 210 if (coreObject->roleValue() == LegendRole) { | |
| 211 for (AccessibilityObject* parent = coreObject->parentObjectUnignored();
parent; parent = parent->parentObjectUnignored()) { | |
| 212 if (parent->isFieldset()) { | |
| 213 atk_relation_set_add_relation_by_type(relationSet, ATK_RELATION_
LABEL_FOR, parent->wrapper()); | |
| 214 break; | |
| 215 } | |
| 216 } | |
| 217 return; | |
| 218 } | |
| 219 | |
| 220 if (coreObject->isControl()) { | |
| 221 AccessibilityObject* label = coreObject->correspondingLabelForControlEle
ment(); | |
| 222 if (label) | |
| 223 atk_relation_set_add_relation_by_type(relationSet, ATK_RELATION_LABE
LLED_BY, label->wrapper()); | |
| 224 } else { | |
| 225 AccessibilityObject* control = coreObject->correspondingControlForLabelE
lement(); | |
| 226 if (control) | |
| 227 atk_relation_set_add_relation_by_type(relationSet, ATK_RELATION_LABE
L_FOR, control->wrapper()); | |
| 228 } | |
| 229 } | |
| 230 | |
| 231 static gpointer webkitAccessibleParentClass = 0; | |
| 232 | |
| 233 static bool isRootObject(AccessibilityObject* coreObject) | |
| 234 { | |
| 235 // The root accessible object in WebCore is always an object with | |
| 236 // the ScrolledArea role with one child with the WebArea role. | |
| 237 if (!coreObject || !coreObject->isScrollView()) | |
| 238 return false; | |
| 239 | |
| 240 AccessibilityObject* firstChild = coreObject->firstChild(); | |
| 241 if (!firstChild || !firstChild->isWebArea()) | |
| 242 return false; | |
| 243 | |
| 244 return true; | |
| 245 } | |
| 246 | |
| 247 static AtkObject* atkParentOfRootObject(AtkObject* object) | |
| 248 { | |
| 249 AccessibilityObject* coreObject = core(object); | |
| 250 AccessibilityObject* coreParent = coreObject->parentObjectUnignored(); | |
| 251 | |
| 252 // The top level object claims to not have a parent. This makes it | |
| 253 // impossible for assistive technologies to ascend the accessible | |
| 254 // hierarchy all the way to the application. (Bug 30489) | |
| 255 if (!coreParent && isRootObject(coreObject)) { | |
| 256 Document* document = coreObject->document(); | |
| 257 if (!document) | |
| 258 return 0; | |
| 259 | |
| 260 #if PLATFORM(GTK) | |
| 261 HostWindow* hostWindow = document->view()->hostWindow(); | |
| 262 if (hostWindow) { | |
| 263 PlatformPageClient scrollView = hostWindow->platformPageClient(); | |
| 264 if (scrollView) { | |
| 265 GtkWidget* scrollViewParent = gtk_widget_get_parent(scrollView); | |
| 266 if (scrollViewParent) | |
| 267 return gtk_widget_get_accessible(scrollViewParent); | |
| 268 } | |
| 269 } | |
| 270 #endif // PLATFORM(GTK) | |
| 271 } | |
| 272 | |
| 273 if (!coreParent) | |
| 274 return 0; | |
| 275 | |
| 276 return coreParent->wrapper(); | |
| 277 } | |
| 278 | |
| 279 static AtkObject* webkitAccessibleGetParent(AtkObject* object) | |
| 280 { | |
| 281 // Check first if the parent has been already set. | |
| 282 AtkObject* accessibleParent = ATK_OBJECT_CLASS(webkitAccessibleParentClass)-
>get_parent(object); | |
| 283 if (accessibleParent) | |
| 284 return accessibleParent; | |
| 285 | |
| 286 // Parent not set yet, so try to find it in the hierarchy. | |
| 287 AccessibilityObject* coreObject = core(object); | |
| 288 if (!coreObject) | |
| 289 return 0; | |
| 290 | |
| 291 AccessibilityObject* coreParent = coreObject->parentObjectUnignored(); | |
| 292 | |
| 293 if (!coreParent && isRootObject(coreObject)) | |
| 294 return atkParentOfRootObject(object); | |
| 295 | |
| 296 if (!coreParent) | |
| 297 return 0; | |
| 298 | |
| 299 // We don't expose table rows to Assistive technologies, but we | |
| 300 // need to have them anyway in the hierarchy from WebCore to | |
| 301 // properly perform coordinates calculations when requested. | |
| 302 if (coreParent->isTableRow() && coreObject->isTableCell()) | |
| 303 coreParent = coreParent->parentObjectUnignored(); | |
| 304 | |
| 305 return coreParent->wrapper(); | |
| 306 } | |
| 307 | |
| 308 static gint getNChildrenForTable(AccessibilityObject* coreObject) | |
| 309 { | |
| 310 AccessibilityObject::AccessibilityChildrenVector tableChildren = coreObject-
>children(); | |
| 311 size_t tableChildrenCount = tableChildren.size(); | |
| 312 size_t cellsCount = 0; | |
| 313 | |
| 314 // Look for the actual index of the cell inside the table. | |
| 315 for (unsigned i = 0; i < tableChildrenCount; ++i) { | |
| 316 if (tableChildren[i]->isTableRow()) { | |
| 317 AccessibilityObject::AccessibilityChildrenVector rowChildren = table
Children[i]->children(); | |
| 318 cellsCount += rowChildren.size(); | |
| 319 } else | |
| 320 cellsCount++; | |
| 321 } | |
| 322 | |
| 323 return cellsCount; | |
| 324 } | |
| 325 | |
| 326 static gint webkitAccessibleGetNChildren(AtkObject* object) | |
| 327 { | |
| 328 AccessibilityObject* coreObject = core(object); | |
| 329 | |
| 330 // Tables should be treated in a different way because rows should | |
| 331 // be bypassed when exposing the accessible hierarchy. | |
| 332 if (coreObject->isAccessibilityTable()) | |
| 333 return getNChildrenForTable(coreObject); | |
| 334 | |
| 335 return coreObject->children().size(); | |
| 336 } | |
| 337 | |
| 338 static AccessibilityObject* getChildForTable(AccessibilityObject* coreObject, gi
nt index) | |
| 339 { | |
| 340 AccessibilityObject::AccessibilityChildrenVector tableChildren = coreObject-
>children(); | |
| 341 size_t tableChildrenCount = tableChildren.size(); | |
| 342 size_t cellsCount = 0; | |
| 343 | |
| 344 // Look for the actual index of the cell inside the table. | |
| 345 size_t current = static_cast<size_t>(index); | |
| 346 for (unsigned i = 0; i < tableChildrenCount; ++i) { | |
| 347 if (tableChildren[i]->isTableRow()) { | |
| 348 AccessibilityObject::AccessibilityChildrenVector rowChildren = table
Children[i]->children(); | |
| 349 size_t rowChildrenCount = rowChildren.size(); | |
| 350 if (current < cellsCount + rowChildrenCount) | |
| 351 return rowChildren.at(current - cellsCount).get(); | |
| 352 cellsCount += rowChildrenCount; | |
| 353 } else if (cellsCount == current) | |
| 354 return tableChildren[i].get(); | |
| 355 else | |
| 356 cellsCount++; | |
| 357 } | |
| 358 | |
| 359 // Shouldn't reach if the child was found. | |
| 360 return 0; | |
| 361 } | |
| 362 | |
| 363 static AtkObject* webkitAccessibleRefChild(AtkObject* object, gint index) | |
| 364 { | |
| 365 if (index < 0) | |
| 366 return 0; | |
| 367 | |
| 368 AccessibilityObject* coreObject = core(object); | |
| 369 AccessibilityObject* coreChild = 0; | |
| 370 | |
| 371 // Tables are special cases because rows should be bypassed, but | |
| 372 // still taking their cells into account. | |
| 373 if (coreObject->isAccessibilityTable()) | |
| 374 coreChild = getChildForTable(coreObject, index); | |
| 375 else { | |
| 376 AccessibilityObject::AccessibilityChildrenVector children = coreObject->
children(); | |
| 377 if (static_cast<unsigned>(index) >= children.size()) | |
| 378 return 0; | |
| 379 coreChild = children.at(index).get(); | |
| 380 } | |
| 381 | |
| 382 if (!coreChild) | |
| 383 return 0; | |
| 384 | |
| 385 AtkObject* child = coreChild->wrapper(); | |
| 386 atk_object_set_parent(child, object); | |
| 387 g_object_ref(child); | |
| 388 | |
| 389 return child; | |
| 390 } | |
| 391 | |
| 392 static gint getIndexInParentForCellInRow(AccessibilityObject* coreObject) | |
| 393 { | |
| 394 AccessibilityObject* parent = coreObject->parentObjectUnignored(); | |
| 395 if (!parent) | |
| 396 return -1; | |
| 397 | |
| 398 AccessibilityObject* grandParent = parent->parentObjectUnignored(); | |
| 399 if (!grandParent) | |
| 400 return -1; | |
| 401 | |
| 402 AccessibilityObject::AccessibilityChildrenVector rows = grandParent->childre
n(); | |
| 403 size_t rowsCount = rows.size(); | |
| 404 size_t previousCellsCount = 0; | |
| 405 | |
| 406 // Look for the actual index of the cell inside the table. | |
| 407 for (unsigned i = 0; i < rowsCount; ++i) { | |
| 408 if (!rows[i]->isTableRow()) | |
| 409 continue; | |
| 410 | |
| 411 AccessibilityObject::AccessibilityChildrenVector cells = rows[i]->childr
en(); | |
| 412 size_t cellsCount = cells.size(); | |
| 413 | |
| 414 if (rows[i] == parent) { | |
| 415 for (unsigned j = 0; j < cellsCount; ++j) { | |
| 416 if (cells[j] == coreObject) | |
| 417 return previousCellsCount + j; | |
| 418 } | |
| 419 } | |
| 420 | |
| 421 previousCellsCount += cellsCount; | |
| 422 } | |
| 423 | |
| 424 return -1; | |
| 425 } | |
| 426 | |
| 427 static gint webkitAccessibleGetIndexInParent(AtkObject* object) | |
| 428 { | |
| 429 AccessibilityObject* coreObject = core(object); | |
| 430 AccessibilityObject* parent = coreObject->parentObjectUnignored(); | |
| 431 | |
| 432 if (!parent && isRootObject(coreObject)) { | |
| 433 AtkObject* atkParent = atkParentOfRootObject(object); | |
| 434 if (!atkParent) | |
| 435 return -1; | |
| 436 | |
| 437 unsigned count = atk_object_get_n_accessible_children(atkParent); | |
| 438 for (unsigned i = 0; i < count; ++i) { | |
| 439 AtkObject* child = atk_object_ref_accessible_child(atkParent, i); | |
| 440 bool childIsObject = child == object; | |
| 441 g_object_unref(child); | |
| 442 if (childIsObject) | |
| 443 return i; | |
| 444 } | |
| 445 } | |
| 446 | |
| 447 // Need to calculate the index of the cell in the table, as | |
| 448 // rows won't be exposed to assistive technologies. | |
| 449 if (parent && parent->isTableRow() && coreObject->isTableCell()) | |
| 450 return getIndexInParentForCellInRow(coreObject); | |
| 451 | |
| 452 if (!parent) | |
| 453 return -1; | |
| 454 | |
| 455 size_t index = parent->children().find(coreObject); | |
| 456 return (index == WTF::notFound) ? -1 : index; | |
| 457 } | |
| 458 | |
| 459 static AtkAttributeSet* webkitAccessibleGetAttributes(AtkObject* object) | |
| 460 { | |
| 461 AtkAttributeSet* attributeSet = 0; | |
| 462 #if PLATFORM(GTK) | |
| 463 attributeSet = addToAtkAttributeSet(attributeSet, "toolkit", "WebKitGtk"); | |
| 464 #endif | |
| 465 | |
| 466 AccessibilityObject* coreObject = core(object); | |
| 467 if (!coreObject) | |
| 468 return attributeSet; | |
| 469 | |
| 470 // Hack needed for WebKit2 tests because obtaining an element by its ID | |
| 471 // cannot be done from the UIProcess. Assistive technologies have no need | |
| 472 // for this information. | |
| 473 Node* node = coreObject->node(); | |
| 474 if (node && node->isElementNode()) { | |
| 475 String id = toElement(node)->getIdAttribute().string(); | |
| 476 if (!id.isEmpty()) | |
| 477 attributeSet = addToAtkAttributeSet(attributeSet, "html-id", id.utf8
().data()); | |
| 478 } | |
| 479 | |
| 480 int headingLevel = coreObject->headingLevel(); | |
| 481 if (headingLevel) { | |
| 482 String value = String::number(headingLevel); | |
| 483 attributeSet = addToAtkAttributeSet(attributeSet, "level", value.utf8().
data()); | |
| 484 } | |
| 485 | |
| 486 // Set the 'layout-guess' attribute to help Assistive | |
| 487 // Technologies know when an exposed table is not data table. | |
| 488 if (coreObject->isAccessibilityTable() && !coreObject->isDataTable()) | |
| 489 attributeSet = addToAtkAttributeSet(attributeSet, "layout-guess", "true"
); | |
| 490 | |
| 491 String placeholder = coreObject->placeholderValue(); | |
| 492 if (!placeholder.isEmpty()) | |
| 493 attributeSet = addToAtkAttributeSet(attributeSet, "placeholder-text", pl
aceholder.utf8().data()); | |
| 494 | |
| 495 return attributeSet; | |
| 496 } | |
| 497 | |
| 498 static AtkRole atkRole(AccessibilityRole role) | |
| 499 { | |
| 500 switch (role) { | |
| 501 case UnknownRole: | |
| 502 return ATK_ROLE_UNKNOWN; | |
| 503 case ButtonRole: | |
| 504 return ATK_ROLE_PUSH_BUTTON; | |
| 505 case ToggleButtonRole: | |
| 506 return ATK_ROLE_TOGGLE_BUTTON; | |
| 507 case RadioButtonRole: | |
| 508 return ATK_ROLE_RADIO_BUTTON; | |
| 509 case CheckBoxRole: | |
| 510 return ATK_ROLE_CHECK_BOX; | |
| 511 case SliderRole: | |
| 512 return ATK_ROLE_SLIDER; | |
| 513 case TabGroupRole: | |
| 514 case TabListRole: | |
| 515 return ATK_ROLE_PAGE_TAB_LIST; | |
| 516 case TextFieldRole: | |
| 517 case TextAreaRole: | |
| 518 return ATK_ROLE_ENTRY; | |
| 519 case StaticTextRole: | |
| 520 return ATK_ROLE_TEXT; | |
| 521 case OutlineRole: | |
| 522 return ATK_ROLE_TREE; | |
| 523 case MenuBarRole: | |
| 524 return ATK_ROLE_MENU_BAR; | |
| 525 case MenuListPopupRole: | |
| 526 case MenuRole: | |
| 527 return ATK_ROLE_MENU; | |
| 528 case MenuListOptionRole: | |
| 529 case MenuItemRole: | |
| 530 return ATK_ROLE_MENU_ITEM; | |
| 531 case ColumnRole: | |
| 532 // return ATK_ROLE_TABLE_COLUMN_HEADER; // Is this right? | |
| 533 return ATK_ROLE_UNKNOWN; // Matches Mozilla | |
| 534 case RowRole: | |
| 535 // return ATK_ROLE_TABLE_ROW_HEADER; // Is this right? | |
| 536 return ATK_ROLE_LIST_ITEM; // Matches Mozilla | |
| 537 case ToolbarRole: | |
| 538 return ATK_ROLE_TOOL_BAR; | |
| 539 case BusyIndicatorRole: | |
| 540 return ATK_ROLE_PROGRESS_BAR; // Is this right? | |
| 541 case ProgressIndicatorRole: | |
| 542 // return ATK_ROLE_SPIN_BUTTON; // Some confusion about this role in Acc
essibilityRenderObject.cpp | |
| 543 return ATK_ROLE_PROGRESS_BAR; | |
| 544 case WindowRole: | |
| 545 return ATK_ROLE_WINDOW; | |
| 546 case PopUpButtonRole: | |
| 547 case ComboBoxRole: | |
| 548 return ATK_ROLE_COMBO_BOX; | |
| 549 case SplitGroupRole: | |
| 550 return ATK_ROLE_SPLIT_PANE; | |
| 551 case SplitterRole: | |
| 552 return ATK_ROLE_UNKNOWN; | |
| 553 case ColorWellRole: | |
| 554 return ATK_ROLE_COLOR_CHOOSER; | |
| 555 case ListRole: | |
| 556 return ATK_ROLE_LIST; | |
| 557 case ScrollBarRole: | |
| 558 return ATK_ROLE_SCROLL_BAR; | |
| 559 case ScrollAreaRole: | |
| 560 return ATK_ROLE_SCROLL_PANE; | |
| 561 case GridRole: // Is this right? | |
| 562 case TableRole: | |
| 563 return ATK_ROLE_TABLE; | |
| 564 case ApplicationRole: | |
| 565 return ATK_ROLE_APPLICATION; | |
| 566 case GroupRole: | |
| 567 case RadioGroupRole: | |
| 568 case TabPanelRole: | |
| 569 return ATK_ROLE_PANEL; | |
| 570 case RowHeaderRole: // Row headers are cells after all. | |
| 571 case ColumnHeaderRole: // Column headers are cells after all. | |
| 572 case CellRole: | |
| 573 return ATK_ROLE_TABLE_CELL; | |
| 574 case LinkRole: | |
| 575 case WebCoreLinkRole: | |
| 576 case ImageMapLinkRole: | |
| 577 return ATK_ROLE_LINK; | |
| 578 case ImageMapRole: | |
| 579 case ImageRole: | |
| 580 return ATK_ROLE_IMAGE; | |
| 581 case ListMarkerRole: | |
| 582 return ATK_ROLE_TEXT; | |
| 583 case WebAreaRole: | |
| 584 // return ATK_ROLE_HTML_CONTAINER; // Is this right? | |
| 585 return ATK_ROLE_DOCUMENT_FRAME; | |
| 586 case HeadingRole: | |
| 587 return ATK_ROLE_HEADING; | |
| 588 case ListBoxRole: | |
| 589 return ATK_ROLE_LIST; | |
| 590 case ListItemRole: | |
| 591 case ListBoxOptionRole: | |
| 592 return ATK_ROLE_LIST_ITEM; | |
| 593 case ParagraphRole: | |
| 594 return ATK_ROLE_PARAGRAPH; | |
| 595 case LabelRole: | |
| 596 case LegendRole: | |
| 597 return ATK_ROLE_LABEL; | |
| 598 case DivRole: | |
| 599 return ATK_ROLE_SECTION; | |
| 600 case FormRole: | |
| 601 return ATK_ROLE_FORM; | |
| 602 case CanvasRole: | |
| 603 return ATK_ROLE_CANVAS; | |
| 604 case HorizontalRuleRole: | |
| 605 return ATK_ROLE_SEPARATOR; | |
| 606 case SpinButtonRole: | |
| 607 return ATK_ROLE_SPIN_BUTTON; | |
| 608 case TabRole: | |
| 609 return ATK_ROLE_PAGE_TAB; | |
| 610 default: | |
| 611 return ATK_ROLE_UNKNOWN; | |
| 612 } | |
| 613 } | |
| 614 | |
| 615 static AtkRole webkitAccessibleGetRole(AtkObject* object) | |
| 616 { | |
| 617 AccessibilityObject* coreObject = core(object); | |
| 618 | |
| 619 if (!coreObject) | |
| 620 return ATK_ROLE_UNKNOWN; | |
| 621 | |
| 622 // Note: Why doesn't WebCore have a password field for this | |
| 623 if (coreObject->isPasswordField()) | |
| 624 return ATK_ROLE_PASSWORD_TEXT; | |
| 625 | |
| 626 return atkRole(coreObject->roleValue()); | |
| 627 } | |
| 628 | |
| 629 static bool isTextWithCaret(AccessibilityObject* coreObject) | |
| 630 { | |
| 631 if (!coreObject || !coreObject->isAccessibilityRenderObject()) | |
| 632 return false; | |
| 633 | |
| 634 Document* document = coreObject->document(); | |
| 635 if (!document) | |
| 636 return false; | |
| 637 | |
| 638 Frame* frame = document->frame(); | |
| 639 if (!frame) | |
| 640 return false; | |
| 641 | |
| 642 Settings* settings = frame->settings(); | |
| 643 if (!settings || !settings->caretBrowsingEnabled()) | |
| 644 return false; | |
| 645 | |
| 646 // Check text objects and paragraphs only. | |
| 647 AtkObject* axObject = coreObject->wrapper(); | |
| 648 AtkRole role = axObject ? atk_object_get_role(axObject) : ATK_ROLE_INVALID; | |
| 649 if (role != ATK_ROLE_TEXT && role != ATK_ROLE_PARAGRAPH) | |
| 650 return false; | |
| 651 | |
| 652 // Finally, check whether the caret is set in the current object. | |
| 653 VisibleSelection selection = coreObject->selection(); | |
| 654 if (!selection.isCaret()) | |
| 655 return false; | |
| 656 | |
| 657 return selectionBelongsToObject(coreObject, selection); | |
| 658 } | |
| 659 | |
| 660 static void setAtkStateSetFromCoreObject(AccessibilityObject* coreObject, AtkSta
teSet* stateSet) | |
| 661 { | |
| 662 AccessibilityObject* parent = coreObject->parentObject(); | |
| 663 bool isListBoxOption = parent && parent->isListBox(); | |
| 664 | |
| 665 // Please keep the state list in alphabetical order | |
| 666 if (coreObject->isChecked()) | |
| 667 atk_state_set_add_state(stateSet, ATK_STATE_CHECKED); | |
| 668 | |
| 669 // FIXME: isReadOnly does not seem to do the right thing for | |
| 670 // controls, so check explicitly for them. In addition, because | |
| 671 // isReadOnly is false for listBoxOptions, we need to add one | |
| 672 // more check so that we do not present them as being "editable". | |
| 673 if ((!coreObject->isReadOnly() | |
| 674 || (coreObject->isControl() && coreObject->canSetValueAttribute())) | |
| 675 && !isListBoxOption) | |
| 676 atk_state_set_add_state(stateSet, ATK_STATE_EDITABLE); | |
| 677 | |
| 678 // FIXME: Put both ENABLED and SENSITIVE together here for now | |
| 679 if (coreObject->isEnabled()) { | |
| 680 atk_state_set_add_state(stateSet, ATK_STATE_ENABLED); | |
| 681 atk_state_set_add_state(stateSet, ATK_STATE_SENSITIVE); | |
| 682 } | |
| 683 | |
| 684 if (coreObject->canSetExpandedAttribute()) | |
| 685 atk_state_set_add_state(stateSet, ATK_STATE_EXPANDABLE); | |
| 686 | |
| 687 if (coreObject->isExpanded()) | |
| 688 atk_state_set_add_state(stateSet, ATK_STATE_EXPANDED); | |
| 689 | |
| 690 if (coreObject->canSetFocusAttribute()) | |
| 691 atk_state_set_add_state(stateSet, ATK_STATE_FOCUSABLE); | |
| 692 | |
| 693 if (coreObject->isFocused() || isTextWithCaret(coreObject)) | |
| 694 atk_state_set_add_state(stateSet, ATK_STATE_FOCUSED); | |
| 695 | |
| 696 if (coreObject->orientation() == AccessibilityOrientationHorizontal) | |
| 697 atk_state_set_add_state(stateSet, ATK_STATE_HORIZONTAL); | |
| 698 else if (coreObject->orientation() == AccessibilityOrientationVertical) | |
| 699 atk_state_set_add_state(stateSet, ATK_STATE_VERTICAL); | |
| 700 | |
| 701 if (coreObject->isIndeterminate()) | |
| 702 atk_state_set_add_state(stateSet, ATK_STATE_INDETERMINATE); | |
| 703 | |
| 704 if (coreObject->isMultiSelectable()) | |
| 705 atk_state_set_add_state(stateSet, ATK_STATE_MULTISELECTABLE); | |
| 706 | |
| 707 // TODO: ATK_STATE_OPAQUE | |
| 708 | |
| 709 if (coreObject->isPressed()) | |
| 710 atk_state_set_add_state(stateSet, ATK_STATE_PRESSED); | |
| 711 | |
| 712 // TODO: ATK_STATE_SELECTABLE_TEXT | |
| 713 | |
| 714 if (coreObject->canSetSelectedAttribute()) { | |
| 715 atk_state_set_add_state(stateSet, ATK_STATE_SELECTABLE); | |
| 716 // Items in focusable lists have both STATE_SELECT{ABLE,ED} | |
| 717 // and STATE_FOCUS{ABLE,ED}. We'll fake the latter based on | |
| 718 // the former. | |
| 719 if (isListBoxOption) | |
| 720 atk_state_set_add_state(stateSet, ATK_STATE_FOCUSABLE); | |
| 721 } | |
| 722 | |
| 723 if (coreObject->isSelected()) { | |
| 724 atk_state_set_add_state(stateSet, ATK_STATE_SELECTED); | |
| 725 // Items in focusable lists have both STATE_SELECT{ABLE,ED} | |
| 726 // and STATE_FOCUS{ABLE,ED}. We'll fake the latter based on the | |
| 727 // former. | |
| 728 if (isListBoxOption) | |
| 729 atk_state_set_add_state(stateSet, ATK_STATE_FOCUSED); | |
| 730 } | |
| 731 | |
| 732 // FIXME: Group both SHOWING and VISIBLE here for now | |
| 733 // Not sure how to handle this in WebKit, see bug | |
| 734 // http://bugzilla.gnome.org/show_bug.cgi?id=509650 for other | |
| 735 // issues with SHOWING vs VISIBLE. | |
| 736 if (!coreObject->isOffScreen()) { | |
| 737 atk_state_set_add_state(stateSet, ATK_STATE_SHOWING); | |
| 738 atk_state_set_add_state(stateSet, ATK_STATE_VISIBLE); | |
| 739 } | |
| 740 | |
| 741 // Mutually exclusive, so we group these two | |
| 742 if (coreObject->roleValue() == TextFieldRole) | |
| 743 atk_state_set_add_state(stateSet, ATK_STATE_SINGLE_LINE); | |
| 744 else if (coreObject->roleValue() == TextAreaRole) | |
| 745 atk_state_set_add_state(stateSet, ATK_STATE_MULTI_LINE); | |
| 746 | |
| 747 // TODO: ATK_STATE_SENSITIVE | |
| 748 | |
| 749 if (coreObject->isVisited()) | |
| 750 atk_state_set_add_state(stateSet, ATK_STATE_VISITED); | |
| 751 } | |
| 752 | |
| 753 static AtkStateSet* webkitAccessibleRefStateSet(AtkObject* object) | |
| 754 { | |
| 755 AtkStateSet* stateSet = ATK_OBJECT_CLASS(webkitAccessibleParentClass)->ref_s
tate_set(object); | |
| 756 AccessibilityObject* coreObject = core(object); | |
| 757 | |
| 758 if (coreObject == fallbackObject()) { | |
| 759 atk_state_set_add_state(stateSet, ATK_STATE_DEFUNCT); | |
| 760 return stateSet; | |
| 761 } | |
| 762 | |
| 763 // Text objects must be focusable. | |
| 764 AtkRole role = atk_object_get_role(object); | |
| 765 if (role == ATK_ROLE_TEXT || role == ATK_ROLE_PARAGRAPH) | |
| 766 atk_state_set_add_state(stateSet, ATK_STATE_FOCUSABLE); | |
| 767 | |
| 768 setAtkStateSetFromCoreObject(coreObject, stateSet); | |
| 769 return stateSet; | |
| 770 } | |
| 771 | |
| 772 static AtkRelationSet* webkitAccessibleRefRelationSet(AtkObject* object) | |
| 773 { | |
| 774 AtkRelationSet* relationSet = ATK_OBJECT_CLASS(webkitAccessibleParentClass)-
>ref_relation_set(object); | |
| 775 AccessibilityObject* coreObject = core(object); | |
| 776 | |
| 777 setAtkRelationSetFromCoreObject(coreObject, relationSet); | |
| 778 | |
| 779 return relationSet; | |
| 780 } | |
| 781 | |
| 782 static void webkitAccessibleInit(AtkObject* object, gpointer data) | |
| 783 { | |
| 784 if (ATK_OBJECT_CLASS(webkitAccessibleParentClass)->initialize) | |
| 785 ATK_OBJECT_CLASS(webkitAccessibleParentClass)->initialize(object, data); | |
| 786 | |
| 787 WebKitAccessible* accessible = WEBKIT_ACCESSIBLE(object); | |
| 788 accessible->m_object = reinterpret_cast<AccessibilityObject*>(data); | |
| 789 accessible->priv = WEBKIT_ACCESSIBLE_GET_PRIVATE(accessible); | |
| 790 } | |
| 791 | |
| 792 static void webkitAccessibleFinalize(GObject* object) | |
| 793 { | |
| 794 G_OBJECT_CLASS(webkitAccessibleParentClass)->finalize(object); | |
| 795 } | |
| 796 | |
| 797 static void webkitAccessibleClassInit(AtkObjectClass* klass) | |
| 798 { | |
| 799 GObjectClass* gobjectClass = G_OBJECT_CLASS(klass); | |
| 800 | |
| 801 webkitAccessibleParentClass = g_type_class_peek_parent(klass); | |
| 802 | |
| 803 gobjectClass->finalize = webkitAccessibleFinalize; | |
| 804 | |
| 805 klass->initialize = webkitAccessibleInit; | |
| 806 klass->get_name = webkitAccessibleGetName; | |
| 807 klass->get_description = webkitAccessibleGetDescription; | |
| 808 klass->get_parent = webkitAccessibleGetParent; | |
| 809 klass->get_n_children = webkitAccessibleGetNChildren; | |
| 810 klass->ref_child = webkitAccessibleRefChild; | |
| 811 klass->get_role = webkitAccessibleGetRole; | |
| 812 klass->ref_state_set = webkitAccessibleRefStateSet; | |
| 813 klass->get_index_in_parent = webkitAccessibleGetIndexInParent; | |
| 814 klass->get_attributes = webkitAccessibleGetAttributes; | |
| 815 klass->ref_relation_set = webkitAccessibleRefRelationSet; | |
| 816 | |
| 817 g_type_class_add_private(klass, sizeof(WebKitAccessiblePrivate)); | |
| 818 } | |
| 819 | |
| 820 GType | |
| 821 webkitAccessibleGetType(void) | |
| 822 { | |
| 823 static volatile gsize typeVolatile = 0; | |
| 824 | |
| 825 if (g_once_init_enter(&typeVolatile)) { | |
| 826 static const GTypeInfo tinfo = { | |
| 827 sizeof(WebKitAccessibleClass), | |
| 828 (GBaseInitFunc) 0, | |
| 829 (GBaseFinalizeFunc) 0, | |
| 830 (GClassInitFunc) webkitAccessibleClassInit, | |
| 831 (GClassFinalizeFunc) 0, | |
| 832 0, /* class data */ | |
| 833 sizeof(WebKitAccessible), /* instance size */ | |
| 834 0, /* nb preallocs */ | |
| 835 (GInstanceInitFunc) 0, | |
| 836 0 /* value table */ | |
| 837 }; | |
| 838 | |
| 839 GType type = g_type_register_static(ATK_TYPE_OBJECT, "WebKitAccessible",
&tinfo, GTypeFlags(0)); | |
| 840 g_once_init_leave(&typeVolatile, type); | |
| 841 } | |
| 842 | |
| 843 return typeVolatile; | |
| 844 } | |
| 845 | |
| 846 static const GInterfaceInfo AtkInterfacesInitFunctions[] = { | |
| 847 {reinterpret_cast<GInterfaceInitFunc>(webkitAccessibleActionInterfaceInit),
0, 0}, | |
| 848 {reinterpret_cast<GInterfaceInitFunc>(webkitAccessibleSelectionInterfaceInit
), 0, 0}, | |
| 849 {reinterpret_cast<GInterfaceInitFunc>(webkitAccessibleEditableTextInterfaceI
nit), 0, 0}, | |
| 850 {reinterpret_cast<GInterfaceInitFunc>(webkitAccessibleTextInterfaceInit), 0,
0}, | |
| 851 {reinterpret_cast<GInterfaceInitFunc>(webkitAccessibleComponentInterfaceInit
), 0, 0}, | |
| 852 {reinterpret_cast<GInterfaceInitFunc>(webkitAccessibleImageInterfaceInit), 0
, 0}, | |
| 853 {reinterpret_cast<GInterfaceInitFunc>(webkitAccessibleTableInterfaceInit), 0
, 0}, | |
| 854 {reinterpret_cast<GInterfaceInitFunc>(webkitAccessibleHypertextInterfaceInit
), 0, 0}, | |
| 855 {reinterpret_cast<GInterfaceInitFunc>(webkitAccessibleHyperlinkImplInterface
Init), 0, 0}, | |
| 856 {reinterpret_cast<GInterfaceInitFunc>(webkitAccessibleDocumentInterfaceInit)
, 0, 0}, | |
| 857 {reinterpret_cast<GInterfaceInitFunc>(webkitAccessibleValueInterfaceInit), 0
, 0} | |
| 858 }; | |
| 859 | |
| 860 enum WAIType { | |
| 861 WAI_ACTION, | |
| 862 WAI_SELECTION, | |
| 863 WAI_EDITABLE_TEXT, | |
| 864 WAI_TEXT, | |
| 865 WAI_COMPONENT, | |
| 866 WAI_IMAGE, | |
| 867 WAI_TABLE, | |
| 868 WAI_HYPERTEXT, | |
| 869 WAI_HYPERLINK, | |
| 870 WAI_DOCUMENT, | |
| 871 WAI_VALUE, | |
| 872 }; | |
| 873 | |
| 874 static GType GetAtkInterfaceTypeFromWAIType(WAIType type) | |
| 875 { | |
| 876 switch (type) { | |
| 877 case WAI_ACTION: | |
| 878 return ATK_TYPE_ACTION; | |
| 879 case WAI_SELECTION: | |
| 880 return ATK_TYPE_SELECTION; | |
| 881 case WAI_EDITABLE_TEXT: | |
| 882 return ATK_TYPE_EDITABLE_TEXT; | |
| 883 case WAI_TEXT: | |
| 884 return ATK_TYPE_TEXT; | |
| 885 case WAI_COMPONENT: | |
| 886 return ATK_TYPE_COMPONENT; | |
| 887 case WAI_IMAGE: | |
| 888 return ATK_TYPE_IMAGE; | |
| 889 case WAI_TABLE: | |
| 890 return ATK_TYPE_TABLE; | |
| 891 case WAI_HYPERTEXT: | |
| 892 return ATK_TYPE_HYPERTEXT; | |
| 893 case WAI_HYPERLINK: | |
| 894 return ATK_TYPE_HYPERLINK_IMPL; | |
| 895 case WAI_DOCUMENT: | |
| 896 return ATK_TYPE_DOCUMENT; | |
| 897 case WAI_VALUE: | |
| 898 return ATK_TYPE_VALUE; | |
| 899 } | |
| 900 | |
| 901 return G_TYPE_INVALID; | |
| 902 } | |
| 903 | |
| 904 static bool roleIsTextType(AccessibilityRole role) | |
| 905 { | |
| 906 return role == ParagraphRole || role == HeadingRole || role == DivRole || ro
le == CellRole || role == ListItemRole; | |
| 907 } | |
| 908 | |
| 909 static guint16 getInterfaceMaskFromObject(AccessibilityObject* coreObject) | |
| 910 { | |
| 911 guint16 interfaceMask = 0; | |
| 912 | |
| 913 // Component interface is always supported | |
| 914 interfaceMask |= 1 << WAI_COMPONENT; | |
| 915 | |
| 916 AccessibilityRole role = coreObject->roleValue(); | |
| 917 | |
| 918 // Action | |
| 919 // As the implementation of the AtkAction interface is a very | |
| 920 // basic one (just relays in executing the default action for each | |
| 921 // object, and only supports having one action per object), it is | |
| 922 // better just to implement this interface for every instance of | |
| 923 // the WebKitAccessible class and let WebCore decide what to do. | |
| 924 interfaceMask |= 1 << WAI_ACTION; | |
| 925 | |
| 926 // Selection | |
| 927 if (coreObject->isListBox() || coreObject->isMenuList()) | |
| 928 interfaceMask |= 1 << WAI_SELECTION; | |
| 929 | |
| 930 // Get renderer if available. | |
| 931 RenderObject* renderer = 0; | |
| 932 if (coreObject->isAccessibilityRenderObject()) | |
| 933 renderer = coreObject->renderer(); | |
| 934 | |
| 935 // Hyperlink (links and embedded objects). | |
| 936 if (coreObject->isLink() || (renderer && renderer->isReplaced())) | |
| 937 interfaceMask |= 1 << WAI_HYPERLINK; | |
| 938 | |
| 939 // Text & Editable Text | |
| 940 if (role == StaticTextRole || coreObject->isMenuListOption()) | |
| 941 interfaceMask |= 1 << WAI_TEXT; | |
| 942 else { | |
| 943 if (coreObject->isTextControl()) { | |
| 944 interfaceMask |= 1 << WAI_TEXT; | |
| 945 if (!coreObject->isReadOnly()) | |
| 946 interfaceMask |= 1 << WAI_EDITABLE_TEXT; | |
| 947 } else { | |
| 948 if (role != TableRole) { | |
| 949 interfaceMask |= 1 << WAI_HYPERTEXT; | |
| 950 if ((renderer && renderer->childrenInline()) || roleIsTextType(r
ole)) | |
| 951 interfaceMask |= 1 << WAI_TEXT; | |
| 952 } | |
| 953 | |
| 954 // Add the TEXT interface for list items whose | |
| 955 // first accessible child has a text renderer | |
| 956 if (role == ListItemRole) { | |
| 957 AccessibilityObject::AccessibilityChildrenVector children = core
Object->children(); | |
| 958 if (children.size()) { | |
| 959 AccessibilityObject* axRenderChild = children.at(0).get(); | |
| 960 interfaceMask |= getInterfaceMaskFromObject(axRenderChild); | |
| 961 } | |
| 962 } | |
| 963 } | |
| 964 } | |
| 965 | |
| 966 // Image | |
| 967 if (coreObject->isImage()) | |
| 968 interfaceMask |= 1 << WAI_IMAGE; | |
| 969 | |
| 970 // Table | |
| 971 if (role == TableRole) | |
| 972 interfaceMask |= 1 << WAI_TABLE; | |
| 973 | |
| 974 // Document | |
| 975 if (role == WebAreaRole) | |
| 976 interfaceMask |= 1 << WAI_DOCUMENT; | |
| 977 | |
| 978 // Value | |
| 979 if (role == SliderRole || role == SpinButtonRole || role == ScrollBarRole) | |
| 980 interfaceMask |= 1 << WAI_VALUE; | |
| 981 | |
| 982 return interfaceMask; | |
| 983 } | |
| 984 | |
| 985 static const char* getUniqueAccessibilityTypeName(guint16 interfaceMask) | |
| 986 { | |
| 987 #define WAI_TYPE_NAME_LEN (30) /* Enough for prefix + 5 hex characters (max) */ | |
| 988 static char name[WAI_TYPE_NAME_LEN + 1]; | |
| 989 | |
| 990 g_sprintf(name, "WAIType%x", interfaceMask); | |
| 991 name[WAI_TYPE_NAME_LEN] = '\0'; | |
| 992 | |
| 993 return name; | |
| 994 } | |
| 995 | |
| 996 static GType getAccessibilityTypeFromObject(AccessibilityObject* coreObject) | |
| 997 { | |
| 998 static const GTypeInfo typeInfo = { | |
| 999 sizeof(WebKitAccessibleClass), | |
| 1000 (GBaseInitFunc) 0, | |
| 1001 (GBaseFinalizeFunc) 0, | |
| 1002 (GClassInitFunc) 0, | |
| 1003 (GClassFinalizeFunc) 0, | |
| 1004 0, /* class data */ | |
| 1005 sizeof(WebKitAccessible), /* instance size */ | |
| 1006 0, /* nb preallocs */ | |
| 1007 (GInstanceInitFunc) 0, | |
| 1008 0 /* value table */ | |
| 1009 }; | |
| 1010 | |
| 1011 guint16 interfaceMask = getInterfaceMaskFromObject(coreObject); | |
| 1012 const char* atkTypeName = getUniqueAccessibilityTypeName(interfaceMask); | |
| 1013 GType type = g_type_from_name(atkTypeName); | |
| 1014 if (type) | |
| 1015 return type; | |
| 1016 | |
| 1017 type = g_type_register_static(WEBKIT_TYPE_ACCESSIBLE, atkTypeName, &typeInfo
, GTypeFlags(0)); | |
| 1018 for (guint i = 0; i < G_N_ELEMENTS(AtkInterfacesInitFunctions); i++) { | |
| 1019 if (interfaceMask & (1 << i)) | |
| 1020 g_type_add_interface_static(type, | |
| 1021 GetAtkInterfaceTypeFromWAIType(static_cast<WAIType>(i)), | |
| 1022 &AtkInterfacesInitFunctions[i]); | |
| 1023 } | |
| 1024 | |
| 1025 return type; | |
| 1026 } | |
| 1027 | |
| 1028 WebKitAccessible* webkitAccessibleNew(AccessibilityObject* coreObject) | |
| 1029 { | |
| 1030 GType type = getAccessibilityTypeFromObject(coreObject); | |
| 1031 AtkObject* object = static_cast<AtkObject*>(g_object_new(type, 0)); | |
| 1032 | |
| 1033 atk_object_initialize(object, coreObject); | |
| 1034 | |
| 1035 return WEBKIT_ACCESSIBLE(object); | |
| 1036 } | |
| 1037 | |
| 1038 AccessibilityObject* webkitAccessibleGetAccessibilityObject(WebKitAccessible* ac
cessible) | |
| 1039 { | |
| 1040 return accessible->m_object; | |
| 1041 } | |
| 1042 | |
| 1043 void webkitAccessibleDetach(WebKitAccessible* accessible) | |
| 1044 { | |
| 1045 ASSERT(accessible->m_object); | |
| 1046 | |
| 1047 if (core(accessible)->roleValue() == WebAreaRole) | |
| 1048 g_signal_emit_by_name(accessible, "state-change", "defunct", true); | |
| 1049 | |
| 1050 // We replace the WebCore AccessibilityObject with a fallback object that | |
| 1051 // provides default implementations to avoid repetitive null-checking after | |
| 1052 // detachment. | |
| 1053 accessible->m_object = fallbackObject(); | |
| 1054 } | |
| 1055 | |
| 1056 AtkObject* webkitAccessibleGetFocusedElement(WebKitAccessible* accessible) | |
| 1057 { | |
| 1058 if (!accessible->m_object) | |
| 1059 return 0; | |
| 1060 | |
| 1061 RefPtr<AccessibilityObject> focusedObj = accessible->m_object->focusedUIElem
ent(); | |
| 1062 if (!focusedObj) | |
| 1063 return 0; | |
| 1064 | |
| 1065 return focusedObj->wrapper(); | |
| 1066 } | |
| 1067 | |
| 1068 AccessibilityObject* objectFocusedAndCaretOffsetUnignored(AccessibilityObject* r
eferenceObject, int& offset) | |
| 1069 { | |
| 1070 // Indication that something bogus has transpired. | |
| 1071 offset = -1; | |
| 1072 | |
| 1073 Document* document = referenceObject->document(); | |
| 1074 if (!document) | |
| 1075 return 0; | |
| 1076 | |
| 1077 Node* focusedNode = referenceObject->selection().end().containerNode(); | |
| 1078 if (!focusedNode) | |
| 1079 return 0; | |
| 1080 | |
| 1081 RenderObject* focusedRenderer = focusedNode->renderer(); | |
| 1082 if (!focusedRenderer) | |
| 1083 return 0; | |
| 1084 | |
| 1085 AccessibilityObject* focusedObject = document->axObjectCache()->getOrCreate(
focusedRenderer); | |
| 1086 if (!focusedObject) | |
| 1087 return 0; | |
| 1088 | |
| 1089 // Look for the actual (not ignoring accessibility) selected object. | |
| 1090 AccessibilityObject* firstUnignoredParent = focusedObject; | |
| 1091 if (firstUnignoredParent->accessibilityIsIgnored()) | |
| 1092 firstUnignoredParent = firstUnignoredParent->parentObjectUnignored(); | |
| 1093 if (!firstUnignoredParent) | |
| 1094 return 0; | |
| 1095 | |
| 1096 // Don't ignore links if the offset is being requested for a link. | |
| 1097 if (!referenceObject->isLink() && firstUnignoredParent->isLink()) | |
| 1098 firstUnignoredParent = firstUnignoredParent->parentObjectUnignored(); | |
| 1099 if (!firstUnignoredParent) | |
| 1100 return 0; | |
| 1101 | |
| 1102 // The reference object must either coincide with the focused | |
| 1103 // object being considered, or be a descendant of it. | |
| 1104 if (referenceObject->isDescendantOfObject(firstUnignoredParent)) | |
| 1105 referenceObject = firstUnignoredParent; | |
| 1106 | |
| 1107 Node* startNode = 0; | |
| 1108 if (firstUnignoredParent != referenceObject || firstUnignoredParent->isTextC
ontrol()) { | |
| 1109 // We need to use the first child's node of the reference | |
| 1110 // object as the start point to calculate the caret offset | |
| 1111 // because we want it to be relative to the object of | |
| 1112 // reference, not just to the focused object (which could have | |
| 1113 // previous siblings which should be taken into account too). | |
| 1114 AccessibilityObject* axFirstChild = referenceObject->firstChild(); | |
| 1115 if (axFirstChild) | |
| 1116 startNode = axFirstChild->node(); | |
| 1117 } | |
| 1118 // Getting the Position of a PseudoElement now triggers an assertion. | |
| 1119 // This can occur when clicking on empty space in a render block. | |
| 1120 if (!startNode || startNode->isPseudoElement()) | |
| 1121 startNode = firstUnignoredParent->node(); | |
| 1122 | |
| 1123 // Check if the node for the first parent object not ignoring | |
| 1124 // accessibility is null again before using it. This might happen | |
| 1125 // with certain kind of accessibility objects, such as the root | |
| 1126 // one (the scroller containing the webArea object). | |
| 1127 if (!startNode) | |
| 1128 return 0; | |
| 1129 | |
| 1130 VisiblePosition startPosition = VisiblePosition(positionBeforeNode(startNode
), DOWNSTREAM); | |
| 1131 VisiblePosition endPosition = firstUnignoredParent->selection().visibleEnd()
; | |
| 1132 | |
| 1133 if (startPosition == endPosition) | |
| 1134 offset = 0; | |
| 1135 else if (!isStartOfLine(endPosition)) { | |
| 1136 RefPtr<Range> range = makeRange(startPosition, endPosition.previous()); | |
| 1137 offset = TextIterator::rangeLength(range.get(), true) + 1; | |
| 1138 } else { | |
| 1139 RefPtr<Range> range = makeRange(startPosition, endPosition); | |
| 1140 offset = TextIterator::rangeLength(range.get(), true); | |
| 1141 } | |
| 1142 | |
| 1143 return firstUnignoredParent; | |
| 1144 } | |
| 1145 | |
| 1146 const char* cacheAndReturnAtkProperty(AtkObject* object, AtkCachedProperty prope
rty, String value) | |
| 1147 { | |
| 1148 WebKitAccessiblePrivate* priv = WEBKIT_ACCESSIBLE(object)->priv; | |
| 1149 CString* propertyPtr = 0; | |
| 1150 | |
| 1151 switch (property) { | |
| 1152 case AtkCachedAccessibleName: | |
| 1153 propertyPtr = &priv->accessibleName; | |
| 1154 break; | |
| 1155 | |
| 1156 case AtkCachedAccessibleDescription: | |
| 1157 propertyPtr = &priv->accessibleDescription; | |
| 1158 break; | |
| 1159 | |
| 1160 case AtkCachedActionName: | |
| 1161 propertyPtr = &priv->actionName; | |
| 1162 break; | |
| 1163 | |
| 1164 case AtkCachedActionKeyBinding: | |
| 1165 propertyPtr = &priv->actionKeyBinding; | |
| 1166 break; | |
| 1167 | |
| 1168 case AtkCachedDocumentLocale: | |
| 1169 propertyPtr = &priv->documentLocale; | |
| 1170 break; | |
| 1171 | |
| 1172 case AtkCachedDocumentType: | |
| 1173 propertyPtr = &priv->documentType; | |
| 1174 break; | |
| 1175 | |
| 1176 case AtkCachedDocumentEncoding: | |
| 1177 propertyPtr = &priv->documentEncoding; | |
| 1178 break; | |
| 1179 | |
| 1180 case AtkCachedDocumentURI: | |
| 1181 propertyPtr = &priv->documentURI; | |
| 1182 break; | |
| 1183 | |
| 1184 case AtkCachedImageDescription: | |
| 1185 propertyPtr = &priv->imageDescription; | |
| 1186 break; | |
| 1187 | |
| 1188 default: | |
| 1189 ASSERT_NOT_REACHED(); | |
| 1190 } | |
| 1191 | |
| 1192 // Don't invalidate old memory if not stricly needed, since other | |
| 1193 // callers might be still holding on to it. | |
| 1194 if (*propertyPtr != value.utf8()) | |
| 1195 *propertyPtr = value.utf8(); | |
| 1196 | |
| 1197 return (*propertyPtr).data(); | |
| 1198 } | |
| 1199 | |
| 1200 #endif // HAVE(ACCESSIBILITY) | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 13726025:
Remove GTK AX support, we've never used it (Closed)
Base URL: svn://svn.chromium.org/blink/trunk