| OLD | NEW |
|---|
| (Empty) |
| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "content/renderer/renderer_accessibility_complete.h" | |
| 6 | |
| 7 #include "base/bind.h" | |
| 8 #include "base/message_loop.h" | |
| 9 #include "content/renderer/accessibility_node_serializer.h" | |
| 10 #include "content/renderer/render_view_impl.h" | |
| 11 #include "third_party/WebKit/Source/WebKit/chromium/public/WebAccessibilityObjec
t.h" | |
| 12 #include "third_party/WebKit/Source/WebKit/chromium/public/WebDocument.h" | |
| 13 #include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h" | |
| 14 #include "third_party/WebKit/Source/WebKit/chromium/public/WebInputElement.h" | |
| 15 #include "third_party/WebKit/Source/WebKit/chromium/public/WebNode.h" | |
| 16 #include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h" | |
| 17 | |
| 18 using WebKit::WebAccessibilityNotification; | |
| 19 using WebKit::WebAccessibilityObject; | |
| 20 using WebKit::WebDocument; | |
| 21 using WebKit::WebFrame; | |
| 22 using WebKit::WebNode; | |
| 23 using WebKit::WebPoint; | |
| 24 using WebKit::WebRect; | |
| 25 using WebKit::WebSize; | |
| 26 using WebKit::WebView; | |
| 27 | |
| 28 namespace content { | |
| 29 | |
| 30 bool WebAccessibilityNotificationToAccessibilityNotification( | |
| 31 WebAccessibilityNotification notification, | |
| 32 AccessibilityNotification* type) { | |
| 33 switch (notification) { | |
| 34 case WebKit::WebAccessibilityNotificationActiveDescendantChanged: | |
| 35 *type = AccessibilityNotificationActiveDescendantChanged; | |
| 36 break; | |
| 37 case WebKit::WebAccessibilityNotificationCheckedStateChanged: | |
| 38 *type = AccessibilityNotificationCheckStateChanged; | |
| 39 break; | |
| 40 case WebKit::WebAccessibilityNotificationChildrenChanged: | |
| 41 *type = AccessibilityNotificationChildrenChanged; | |
| 42 break; | |
| 43 case WebKit::WebAccessibilityNotificationFocusedUIElementChanged: | |
| 44 *type = AccessibilityNotificationFocusChanged; | |
| 45 break; | |
| 46 case WebKit::WebAccessibilityNotificationLayoutComplete: | |
| 47 *type = AccessibilityNotificationLayoutComplete; | |
| 48 break; | |
| 49 case WebKit::WebAccessibilityNotificationLiveRegionChanged: | |
| 50 *type = AccessibilityNotificationLiveRegionChanged; | |
| 51 break; | |
| 52 case WebKit::WebAccessibilityNotificationLoadComplete: | |
| 53 *type = AccessibilityNotificationLoadComplete; | |
| 54 break; | |
| 55 case WebKit::WebAccessibilityNotificationMenuListItemSelected: | |
| 56 *type = AccessibilityNotificationMenuListItemSelected; | |
| 57 break; | |
| 58 case WebKit::WebAccessibilityNotificationMenuListValueChanged: | |
| 59 *type = AccessibilityNotificationMenuListValueChanged; | |
| 60 break; | |
| 61 case WebKit::WebAccessibilityNotificationRowCollapsed: | |
| 62 *type = AccessibilityNotificationRowCollapsed; | |
| 63 break; | |
| 64 case WebKit::WebAccessibilityNotificationRowCountChanged: | |
| 65 *type = AccessibilityNotificationRowCountChanged; | |
| 66 break; | |
| 67 case WebKit::WebAccessibilityNotificationRowExpanded: | |
| 68 *type = AccessibilityNotificationRowExpanded; | |
| 69 break; | |
| 70 case WebKit::WebAccessibilityNotificationScrolledToAnchor: | |
| 71 *type = AccessibilityNotificationScrolledToAnchor; | |
| 72 break; | |
| 73 case WebKit::WebAccessibilityNotificationSelectedChildrenChanged: | |
| 74 *type = AccessibilityNotificationSelectedChildrenChanged; | |
| 75 break; | |
| 76 case WebKit::WebAccessibilityNotificationSelectedTextChanged: | |
| 77 *type = AccessibilityNotificationSelectedTextChanged; | |
| 78 break; | |
| 79 case WebKit::WebAccessibilityNotificationValueChanged: | |
| 80 *type = AccessibilityNotificationValueChanged; | |
| 81 break; | |
| 82 default: | |
| 83 DLOG(WARNING) | |
| 84 << "WebKit accessibility notification not handled in switch!"; | |
| 85 return false; | |
| 86 } | |
| 87 return true; | |
| 88 } | |
| 89 | |
| 90 RendererAccessibilityComplete::RendererAccessibilityComplete( | |
| 91 RenderViewImpl* render_view) | |
| 92 : RendererAccessibility(render_view), | |
| 93 ALLOW_THIS_IN_INITIALIZER_LIST(weak_factory_(this)), | |
| 94 browser_root_(NULL), | |
| 95 last_scroll_offset_(gfx::Size()), | |
| 96 ack_pending_(false) { | |
| 97 WebAccessibilityObject::enableAccessibility(); | |
| 98 | |
| 99 const WebDocument& document = GetMainDocument(); | |
| 100 if (!document.isNull()) { | |
| 101 // It's possible that the webview has already loaded a webpage without | |
| 102 // accessibility being enabled. Initialize the browser's cached | |
| 103 // accessibility tree by sending it a 'load complete' notification. | |
| 104 HandleAccessibilityNotification( | |
| 105 document.accessibilityObject(), | |
| 106 AccessibilityNotificationLayoutComplete); | |
| 107 } | |
| 108 } | |
| 109 | |
| 110 RendererAccessibilityComplete::~RendererAccessibilityComplete() { | |
| 111 } | |
| 112 | |
| 113 bool RendererAccessibilityComplete::OnMessageReceived( | |
| 114 const IPC::Message& message) { | |
| 115 bool handled = true; | |
| 116 IPC_BEGIN_MESSAGE_MAP(RendererAccessibilityComplete, message) | |
| 117 IPC_MESSAGE_HANDLER(AccessibilityMsg_SetFocus, OnSetFocus) | |
| 118 IPC_MESSAGE_HANDLER(AccessibilityMsg_DoDefaultAction, | |
| 119 OnDoDefaultAction) | |
| 120 IPC_MESSAGE_HANDLER(AccessibilityMsg_Notifications_ACK, | |
| 121 OnNotificationsAck) | |
| 122 IPC_MESSAGE_HANDLER(AccessibilityMsg_ScrollToMakeVisible, | |
| 123 OnScrollToMakeVisible) | |
| 124 IPC_MESSAGE_HANDLER(AccessibilityMsg_ScrollToPoint, | |
| 125 OnScrollToPoint) | |
| 126 IPC_MESSAGE_HANDLER(AccessibilityMsg_SetTextSelection, | |
| 127 OnSetTextSelection) | |
| 128 IPC_MESSAGE_UNHANDLED(handled = false) | |
| 129 IPC_END_MESSAGE_MAP() | |
| 130 return handled; | |
| 131 } | |
| 132 | |
| 133 void RendererAccessibilityComplete::FocusedNodeChanged(const WebNode& node) { | |
| 134 const WebDocument& document = GetMainDocument(); | |
| 135 if (document.isNull()) | |
| 136 return; | |
| 137 | |
| 138 if (node.isNull()) { | |
| 139 // When focus is cleared, implicitly focus the document. | |
| 140 // TODO(dmazzoni): Make WebKit send this notification instead. | |
| 141 HandleAccessibilityNotification( | |
| 142 document.accessibilityObject(), | |
| 143 AccessibilityNotificationBlur); | |
| 144 } | |
| 145 } | |
| 146 | |
| 147 void RendererAccessibilityComplete::DidFinishLoad(WebKit::WebFrame* frame) { | |
| 148 const WebDocument& document = GetMainDocument(); | |
| 149 if (document.isNull()) | |
| 150 return; | |
| 151 | |
| 152 // Check to see if the root accessibility object has changed, to work | |
| 153 // around WebKit bugs that cause AXObjectCache to be cleared | |
| 154 // unnecessarily. | |
| 155 // TODO(dmazzoni): remove this once rdar://5794454 is fixed. | |
| 156 WebAccessibilityObject new_root = document.accessibilityObject(); | |
| 157 if (!browser_root_ || new_root.axID() != browser_root_->id) { | |
| 158 HandleAccessibilityNotification( | |
| 159 new_root, | |
| 160 AccessibilityNotificationLayoutComplete); | |
| 161 } | |
| 162 } | |
| 163 | |
| 164 void RendererAccessibilityComplete::HandleWebAccessibilityNotification( | |
| 165 const WebAccessibilityObject& obj, | |
| 166 WebAccessibilityNotification notification) { | |
| 167 AccessibilityNotification temp; | |
| 168 if (!WebAccessibilityNotificationToAccessibilityNotification( | |
| 169 notification, &temp)) { | |
| 170 return; | |
| 171 } | |
| 172 | |
| 173 HandleAccessibilityNotification(obj, temp); | |
| 174 } | |
| 175 | |
| 176 void RendererAccessibilityComplete::HandleAccessibilityNotification( | |
| 177 const WebKit::WebAccessibilityObject& obj, | |
| 178 AccessibilityNotification notification) { | |
| 179 const WebDocument& document = GetMainDocument(); | |
| 180 if (document.isNull()) | |
| 181 return; | |
| 182 | |
| 183 gfx::Size scroll_offset = document.frame()->scrollOffset(); | |
| 184 if (scroll_offset != last_scroll_offset_) { | |
| 185 // Make sure the browser is always aware of the scroll position of | |
| 186 // the root document element by posting a generic notification that | |
| 187 // will update it. | |
| 188 // TODO(dmazzoni): remove this as soon as | |
| 189 // https://bugs.webkit.org/show_bug.cgi?id=73460 is fixed. | |
| 190 last_scroll_offset_ = scroll_offset; | |
| 191 if (!obj.equals(document.accessibilityObject())) { | |
| 192 HandleAccessibilityNotification( | |
| 193 document.accessibilityObject(), | |
| 194 AccessibilityNotificationLayoutComplete); | |
| 195 } | |
| 196 } | |
| 197 | |
| 198 // Add the accessibility object to our cache and ensure it's valid. | |
| 199 AccessibilityHostMsg_NotificationParams acc_notification; | |
| 200 acc_notification.id = obj.axID(); | |
| 201 acc_notification.notification_type = notification; | |
| 202 | |
| 203 // Discard duplicate accessibility notifications. | |
| 204 for (uint32 i = 0; i < pending_notifications_.size(); ++i) { | |
| 205 if (pending_notifications_[i].id == acc_notification.id && | |
| 206 pending_notifications_[i].notification_type == | |
| 207 acc_notification.notification_type) { | |
| 208 return; | |
| 209 } | |
| 210 } | |
| 211 pending_notifications_.push_back(acc_notification); | |
| 212 | |
| 213 if (!ack_pending_ && !weak_factory_.HasWeakPtrs()) { | |
| 214 // When no accessibility notifications are in-flight post a task to send | |
| 215 // the notifications to the browser. We use PostTask so that we can queue | |
| 216 // up additional notifications. | |
| 217 MessageLoop::current()->PostTask( | |
| 218 FROM_HERE, | |
| 219 base::Bind( | |
| 220 &RendererAccessibilityComplete:: | |
| 221 SendPendingAccessibilityNotifications, | |
| 222 weak_factory_.GetWeakPtr())); | |
| 223 } | |
| 224 } | |
| 225 | |
| 226 RendererAccessibilityComplete::BrowserTreeNode::BrowserTreeNode() : id(0) {} | |
| 227 | |
| 228 RendererAccessibilityComplete::BrowserTreeNode::~BrowserTreeNode() {} | |
| 229 | |
| 230 void RendererAccessibilityComplete::SendPendingAccessibilityNotifications() { | |
| 231 const WebDocument& document = GetMainDocument(); | |
| 232 if (document.isNull()) | |
| 233 return; | |
| 234 | |
| 235 if (pending_notifications_.empty()) | |
| 236 return; | |
| 237 | |
| 238 ack_pending_ = true; | |
| 239 | |
| 240 // Make a copy of the notifications, because it's possible that | |
| 241 // actions inside this loop will cause more notifications to be | |
| 242 // queued up. | |
| 243 std::vector<AccessibilityHostMsg_NotificationParams> src_notifications = | |
| 244 pending_notifications_; | |
| 245 pending_notifications_.clear(); | |
| 246 | |
| 247 // Allow WebKit to cache intermediate results since we're doing a bunch | |
| 248 // of read-only queries at once. | |
| 249 WebAccessibilityObject rootObject = document.accessibilityObject(); | |
| 250 rootObject.startCachingComputedObjectAttributesUntilTreeMutates(); | |
| 251 | |
| 252 // Generate a notification message from each WebKit notification. | |
| 253 std::vector<AccessibilityHostMsg_NotificationParams> notification_msgs; | |
| 254 | |
| 255 // Loop over each notification and generate an updated notification message. | |
| 256 for (size_t i = 0; i < src_notifications.size(); ++i) { | |
| 257 AccessibilityHostMsg_NotificationParams& notification = | |
| 258 src_notifications[i]; | |
| 259 | |
| 260 // TODO(dtseng): Come up with a cleaner way of deciding to include children. | |
| 261 int root_id = rootObject.axID(); | |
| 262 bool includes_children = ShouldIncludeChildren(notification) || | |
| 263 root_id == notification.id; | |
| 264 WebAccessibilityObject obj = document.accessibilityObjectFromID( | |
| 265 notification.id); | |
| 266 if (!obj.updateBackingStoreAndCheckValidity()) | |
| 267 continue; | |
| 268 | |
| 269 // The browser may not have this object yet, for example if we get a | |
| 270 // notification on an object that was recently added, or if we get a | |
| 271 // notification on a node before the page has loaded. Work our way | |
| 272 // up the parent chain until we find a node the browser has, or until | |
| 273 // we reach the root. | |
| 274 while (browser_id_map_.find(obj.axID()) == browser_id_map_.end() && | |
| 275 !obj.isDetached() && | |
| 276 obj.axID() != root_id) { | |
| 277 obj = obj.parentObject(); | |
| 278 includes_children = true; | |
| 279 if (notification.notification_type == | |
| 280 AccessibilityNotificationChildrenChanged) { | |
| 281 notification.id = obj.axID(); | |
| 282 } | |
| 283 } | |
| 284 | |
| 285 if (obj.isDetached()) { | |
| 286 #ifndef NDEBUG | |
| 287 if (logging_) | |
| 288 LOG(WARNING) << "Got notification on object that is invalid or has" | |
| 289 << " invalid ancestor. Id: " << obj.axID(); | |
| 290 #endif | |
| 291 continue; | |
| 292 } | |
| 293 | |
| 294 // Another potential problem is that this notification may be on an | |
| 295 // object that is detached from the tree. Determine if this node is not a | |
| 296 // child of its parent, and if so move the notification to the parent. | |
| 297 // TODO(dmazzoni): see if this can be removed after | |
| 298 // https://bugs.webkit.org/show_bug.cgi?id=68466 is fixed. | |
| 299 if (obj.axID() != root_id) { | |
| 300 WebAccessibilityObject parent = obj.parentObject(); | |
| 301 while (!parent.isDetached() && | |
| 302 parent.accessibilityIsIgnored()) { | |
| 303 parent = parent.parentObject(); | |
| 304 } | |
| 305 | |
| 306 if (parent.isDetached()) { | |
| 307 NOTREACHED(); | |
| 308 continue; | |
| 309 } | |
| 310 bool is_child_of_parent = false; | |
| 311 for (unsigned int i = 0; i < parent.childCount(); ++i) { | |
| 312 if (parent.childAt(i).equals(obj)) { | |
| 313 is_child_of_parent = true; | |
| 314 break; | |
| 315 } | |
| 316 } | |
| 317 | |
| 318 if (!is_child_of_parent) { | |
| 319 obj = parent; | |
| 320 notification.id = obj.axID(); | |
| 321 includes_children = true; | |
| 322 } | |
| 323 } | |
| 324 | |
| 325 AccessibilityHostMsg_NotificationParams notification_msg; | |
| 326 notification_msg.notification_type = notification.notification_type; | |
| 327 notification_msg.id = notification.id; | |
| 328 notification_msg.includes_children = includes_children; | |
| 329 SerializeAccessibilityNode(obj, | |
| 330 ¬ification_msg.acc_tree, | |
| 331 includes_children); | |
| 332 if (obj.axID() == root_id) { | |
| 333 DCHECK_EQ(notification_msg.acc_tree.role, | |
| 334 AccessibilityNodeData::ROLE_WEB_AREA); | |
| 335 notification_msg.acc_tree.role = | |
| 336 AccessibilityNodeData::ROLE_ROOT_WEB_AREA; | |
| 337 } | |
| 338 notification_msgs.push_back(notification_msg); | |
| 339 | |
| 340 if (includes_children) | |
| 341 UpdateBrowserTree(notification_msg.acc_tree); | |
| 342 | |
| 343 #ifndef NDEBUG | |
| 344 if (logging_) { | |
| 345 LOG(INFO) << "Accessibility update: \n" | |
| 346 << "routing id=" << routing_id() | |
| 347 << " notification=" | |
| 348 << AccessibilityNotificationToString(notification.notification_type) | |
| 349 << "\n" << notification_msg.acc_tree.DebugString(true); | |
| 350 } | |
| 351 #endif | |
| 352 } | |
| 353 | |
| 354 Send(new AccessibilityHostMsg_Notifications(routing_id(), notification_msgs)); | |
| 355 } | |
| 356 | |
| 357 void RendererAccessibilityComplete::UpdateBrowserTree( | |
| 358 const AccessibilityNodeData& renderer_node) { | |
| 359 BrowserTreeNode* browser_node = NULL; | |
| 360 base::hash_map<int32, BrowserTreeNode*>::iterator iter = | |
| 361 browser_id_map_.find(renderer_node.id); | |
| 362 if (iter != browser_id_map_.end()) { | |
| 363 browser_node = iter->second; | |
| 364 ClearBrowserTreeNode(browser_node); | |
| 365 } else { | |
| 366 DCHECK_EQ(renderer_node.role, AccessibilityNodeData::ROLE_ROOT_WEB_AREA); | |
| 367 if (browser_root_) { | |
| 368 ClearBrowserTreeNode(browser_root_); | |
| 369 browser_id_map_.erase(browser_root_->id); | |
| 370 delete browser_root_; | |
| 371 } | |
| 372 browser_root_ = new BrowserTreeNode; | |
| 373 browser_node = browser_root_; | |
| 374 browser_node->id = renderer_node.id; | |
| 375 browser_id_map_[browser_node->id] = browser_node; | |
| 376 } | |
| 377 browser_node->children.reserve(renderer_node.children.size()); | |
| 378 for (size_t i = 0; i < renderer_node.children.size(); ++i) { | |
| 379 BrowserTreeNode* browser_child_node = new BrowserTreeNode; | |
| 380 browser_child_node->id = renderer_node.children[i].id; | |
| 381 browser_id_map_[browser_child_node->id] = browser_child_node; | |
| 382 browser_node->children.push_back(browser_child_node); | |
| 383 UpdateBrowserTree(renderer_node.children[i]); | |
| 384 } | |
| 385 } | |
| 386 | |
| 387 void RendererAccessibilityComplete::ClearBrowserTreeNode( | |
| 388 BrowserTreeNode* browser_node) { | |
| 389 for (size_t i = 0; i < browser_node->children.size(); ++i) { | |
| 390 browser_id_map_.erase(browser_node->children[i]->id); | |
| 391 ClearBrowserTreeNode(browser_node->children[i]); | |
| 392 delete browser_node->children[i]; | |
| 393 } | |
| 394 browser_node->children.clear(); | |
| 395 } | |
| 396 | |
| 397 void RendererAccessibilityComplete::OnDoDefaultAction(int acc_obj_id) { | |
| 398 const WebDocument& document = GetMainDocument(); | |
| 399 if (document.isNull()) | |
| 400 return; | |
| 401 | |
| 402 WebAccessibilityObject obj = document.accessibilityObjectFromID(acc_obj_id); | |
| 403 if (obj.isDetached()) { | |
| 404 #ifndef NDEBUG | |
| 405 if (logging_) | |
| 406 LOG(WARNING) << "DoDefaultAction on invalid object id " << acc_obj_id; | |
| 407 #endif | |
| 408 return; | |
| 409 } | |
| 410 | |
| 411 obj.performDefaultAction(); | |
| 412 } | |
| 413 | |
| 414 void RendererAccessibilityComplete::OnScrollToMakeVisible( | |
| 415 int acc_obj_id, gfx::Rect subfocus) { | |
| 416 const WebDocument& document = GetMainDocument(); | |
| 417 if (document.isNull()) | |
| 418 return; | |
| 419 | |
| 420 WebAccessibilityObject obj = document.accessibilityObjectFromID(acc_obj_id); | |
| 421 if (obj.isDetached()) { | |
| 422 #ifndef NDEBUG | |
| 423 if (logging_) | |
| 424 LOG(WARNING) << "ScrollToMakeVisible on invalid object id " << acc_obj_id; | |
| 425 #endif | |
| 426 return; | |
| 427 } | |
| 428 | |
| 429 obj.scrollToMakeVisibleWithSubFocus( | |
| 430 WebRect(subfocus.x(), subfocus.y(), | |
| 431 subfocus.width(), subfocus.height())); | |
| 432 | |
| 433 // Make sure the browser gets a notification when the scroll | |
| 434 // position actually changes. | |
| 435 // TODO(dmazzoni): remove this once this bug is fixed: | |
| 436 // https://bugs.webkit.org/show_bug.cgi?id=73460 | |
| 437 HandleAccessibilityNotification( | |
| 438 document.accessibilityObject(), | |
| 439 AccessibilityNotificationLayoutComplete); | |
| 440 } | |
| 441 | |
| 442 void RendererAccessibilityComplete::OnScrollToPoint( | |
| 443 int acc_obj_id, gfx::Point point) { | |
| 444 const WebDocument& document = GetMainDocument(); | |
| 445 if (document.isNull()) | |
| 446 return; | |
| 447 | |
| 448 WebAccessibilityObject obj = document.accessibilityObjectFromID(acc_obj_id); | |
| 449 if (obj.isDetached()) { | |
| 450 #ifndef NDEBUG | |
| 451 if (logging_) | |
| 452 LOG(WARNING) << "ScrollToPoint on invalid object id " << acc_obj_id; | |
| 453 #endif | |
| 454 return; | |
| 455 } | |
| 456 | |
| 457 obj.scrollToGlobalPoint(WebPoint(point.x(), point.y())); | |
| 458 | |
| 459 // Make sure the browser gets a notification when the scroll | |
| 460 // position actually changes. | |
| 461 // TODO(dmazzoni): remove this once this bug is fixed: | |
| 462 // https://bugs.webkit.org/show_bug.cgi?id=73460 | |
| 463 HandleAccessibilityNotification( | |
| 464 document.accessibilityObject(), | |
| 465 AccessibilityNotificationLayoutComplete); | |
| 466 } | |
| 467 | |
| 468 void RendererAccessibilityComplete::OnSetTextSelection( | |
| 469 int acc_obj_id, int start_offset, int end_offset) { | |
| 470 const WebDocument& document = GetMainDocument(); | |
| 471 if (document.isNull()) | |
| 472 return; | |
| 473 | |
| 474 WebAccessibilityObject obj = document.accessibilityObjectFromID(acc_obj_id); | |
| 475 if (obj.isDetached()) { | |
| 476 #ifndef NDEBUG | |
| 477 if (logging_) | |
| 478 LOG(WARNING) << "SetTextSelection on invalid object id " << acc_obj_id; | |
| 479 #endif | |
| 480 return; | |
| 481 } | |
| 482 | |
| 483 // TODO(dmazzoni): support elements other than <input>. | |
| 484 WebKit::WebNode node = obj.node(); | |
| 485 if (!node.isNull() && node.isElementNode()) { | |
| 486 WebKit::WebElement element = node.to<WebKit::WebElement>(); | |
| 487 WebKit::WebInputElement* input_element = | |
| 488 WebKit::toWebInputElement(&element); | |
| 489 if (input_element && input_element->isTextField()) | |
| 490 input_element->setSelectionRange(start_offset, end_offset); | |
| 491 } | |
| 492 } | |
| 493 | |
| 494 void RendererAccessibilityComplete::OnNotificationsAck() { | |
| 495 DCHECK(ack_pending_); | |
| 496 ack_pending_ = false; | |
| 497 SendPendingAccessibilityNotifications(); | |
| 498 } | |
| 499 | |
| 500 void RendererAccessibilityComplete::OnSetFocus(int acc_obj_id) { | |
| 501 const WebDocument& document = GetMainDocument(); | |
| 502 if (document.isNull()) | |
| 503 return; | |
| 504 | |
| 505 WebAccessibilityObject obj = document.accessibilityObjectFromID(acc_obj_id); | |
| 506 if (obj.isDetached()) { | |
| 507 #ifndef NDEBUG | |
| 508 if (logging_) { | |
| 509 LOG(WARNING) << "OnSetAccessibilityFocus on invalid object id " | |
| 510 << acc_obj_id; | |
| 511 } | |
| 512 #endif | |
| 513 return; | |
| 514 } | |
| 515 | |
| 516 WebAccessibilityObject root = document.accessibilityObject(); | |
| 517 if (root.isDetached()) { | |
| 518 #ifndef NDEBUG | |
| 519 if (logging_) { | |
| 520 LOG(WARNING) << "OnSetAccessibilityFocus but root is invalid"; | |
| 521 } | |
| 522 #endif | |
| 523 return; | |
| 524 } | |
| 525 | |
| 526 // By convention, calling SetFocus on the root of the tree should clear the | |
| 527 // current focus. Otherwise set the focus to the new node. | |
| 528 if (acc_obj_id == root.axID()) | |
| 529 render_view()->GetWebView()->clearFocusedNode(); | |
| 530 else | |
| 531 obj.setFocused(true); | |
| 532 } | |
| 533 | |
| 534 bool RendererAccessibilityComplete::ShouldIncludeChildren( | |
| 535 const AccessibilityHostMsg_NotificationParams& notification) { | |
| 536 AccessibilityNotification type = notification.notification_type; | |
| 537 if (type == AccessibilityNotificationChildrenChanged || | |
| 538 type == AccessibilityNotificationLoadComplete || | |
| 539 type == AccessibilityNotificationLiveRegionChanged || | |
| 540 type == AccessibilityNotificationSelectedChildrenChanged) { | |
| 541 return true; | |
| 542 } | |
| 543 return false; | |
| 544 } | |
| 545 | |
| 546 } // namespace content | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 12226061:
Move renderer accessibility to subdir and add OWNERS (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src