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| 1 // Copyright (c) 2010 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 "chrome/browser/browser_accessibility.h" | |
| 6 | |
| 7 #include "base/logging.h" | |
| 8 #include "chrome/browser/browser_accessibility_manager.h" | |
| 9 | |
| 10 using webkit_glue::WebAccessibility; | |
| 11 | |
| 12 BrowserAccessibility::BrowserAccessibility() | |
| 13 : manager_(NULL), | |
| 14 parent_(NULL), | |
| 15 child_id_(-1), | |
| 16 index_in_parent_(-1), | |
| 17 renderer_id_(-1), | |
| 18 instance_active_(false) { | |
| 19 } | |
| 20 | |
| 21 BrowserAccessibility::~BrowserAccessibility() { | |
| 22 InactivateTree(); | |
| 23 } | |
| 24 | |
| 25 void BrowserAccessibility::Initialize( | |
| 26 BrowserAccessibilityManager* manager, | |
| 27 BrowserAccessibility* parent, | |
| 28 LONG child_id, | |
| 29 LONG index_in_parent, | |
| 30 const webkit_glue::WebAccessibility& src) { | |
| 31 manager_ = manager; | |
| 32 parent_ = parent; | |
| 33 child_id_ = child_id; | |
| 34 index_in_parent_ = index_in_parent; | |
| 35 | |
| 36 renderer_id_ = src.id; | |
| 37 name_ = src.name; | |
| 38 value_ = src.value; | |
| 39 attributes_ = src.attributes; | |
| 40 location_ = src.location; | |
| 41 InitRoleAndState(src.role, src.state); | |
| 42 | |
| 43 // If this object doesn't have a name but it does have a description, | |
| 44 // use the description as its name - because some screen readers only | |
| 45 // announce the name. | |
| 46 if (name_.empty() && HasAttribute(WebAccessibility::ATTR_DESCRIPTION)) { | |
| 47 GetAttribute(WebAccessibility::ATTR_DESCRIPTION, &name_); | |
| 48 } | |
| 49 | |
| 50 instance_active_ = true; | |
| 51 } | |
| 52 | |
| 53 void BrowserAccessibility::AddChild(BrowserAccessibility* child) { | |
| 54 children_.push_back(child); | |
| 55 } | |
| 56 | |
| 57 void BrowserAccessibility::InactivateTree() { | |
| 58 // Mark this object as inactive, so calls to all COM methods will return | |
| 59 // failure. | |
| 60 instance_active_ = false; | |
| 61 | |
| 62 // Now we can safely call InactivateTree on our children and remove | |
| 63 // references to them, so that as much of the tree as possible will be | |
| 64 // destroyed now - however, nodes that still have references to them | |
| 65 // might stick around a while until all clients have released them. | |
| 66 for (std::vector<BrowserAccessibility*>::iterator iter = | |
| 67 children_.begin(); | |
| 68 iter != children_.end(); ++iter) { | |
| 69 (*iter)->InactivateTree(); | |
| 70 (*iter)->Release(); | |
| 71 } | |
| 72 children_.clear(); | |
| 73 } | |
| 74 | |
| 75 bool BrowserAccessibility::IsDescendantOf(BrowserAccessibility* ancestor) { | |
| 76 if (this == ancestor) { | |
| 77 return true; | |
| 78 } else if (parent_) { | |
| 79 return parent_->IsDescendantOf(ancestor); | |
| 80 } | |
| 81 | |
| 82 return false; | |
| 83 } | |
| 84 | |
| 85 BrowserAccessibility* BrowserAccessibility::GetPreviousSibling() { | |
| 86 if (parent_ && index_in_parent_ > 0) | |
| 87 return parent_->children_[index_in_parent_ - 1]; | |
| 88 | |
| 89 return NULL; | |
| 90 } | |
| 91 | |
| 92 BrowserAccessibility* BrowserAccessibility::GetNextSibling() { | |
| 93 if (parent_ && | |
| 94 index_in_parent_ < static_cast<int>(parent_->children_.size() - 1)) { | |
| 95 return parent_->children_[index_in_parent_ + 1]; | |
| 96 } | |
| 97 | |
| 98 return NULL; | |
| 99 } | |
| 100 | |
| 101 BrowserAccessibility* BrowserAccessibility::NewReference() { | |
| 102 AddRef(); | |
| 103 return this; | |
| 104 } | |
| 105 | |
| 106 // | |
| 107 // IAccessible methods. | |
| 108 // | |
| 109 // Conventions: | |
| 110 // * Always test for instance_active_ first and return E_FAIL if it's false. | |
| 111 // * Always check for invalid arguments first, even if they're unused. | |
| 112 // * Return S_FALSE if the only output is a string argument and it's empty. | |
| 113 // | |
| 114 | |
| 115 HRESULT BrowserAccessibility::accDoDefaultAction(VARIANT var_id) { | |
| 116 if (!instance_active_) | |
| 117 return E_FAIL; | |
| 118 | |
| 119 BrowserAccessibility* target = GetTargetFromChildID(var_id); | |
| 120 if (!target) | |
| 121 return E_INVALIDARG; | |
| 122 | |
| 123 manager_->DoDefaultAction(*target); | |
| 124 return S_OK; | |
| 125 } | |
| 126 | |
| 127 STDMETHODIMP BrowserAccessibility::accHitTest(LONG x_left, LONG y_top, | |
| 128 VARIANT* child) { | |
| 129 if (!instance_active_) | |
| 130 return E_FAIL; | |
| 131 | |
| 132 if (!child) | |
| 133 return E_INVALIDARG; | |
| 134 | |
| 135 return E_NOTIMPL; | |
| 136 } | |
| 137 | |
| 138 STDMETHODIMP BrowserAccessibility::accLocation(LONG* x_left, LONG* y_top, | |
| 139 LONG* width, LONG* height, | |
| 140 VARIANT var_id) { | |
| 141 if (!instance_active_) | |
| 142 return E_FAIL; | |
| 143 | |
| 144 if (!x_left || !y_top || !width || !height) | |
| 145 return E_INVALIDARG; | |
| 146 | |
| 147 BrowserAccessibility* target = GetTargetFromChildID(var_id); | |
| 148 if (!target) | |
| 149 return E_INVALIDARG; | |
| 150 | |
| 151 // Find the top left corner of the containing window in screen coords, and | |
| 152 // adjust the output position by this amount. | |
| 153 HWND parent_hwnd = manager_->GetParentHWND(); | |
| 154 POINT top_left = {0, 0}; | |
| 155 ::ClientToScreen(parent_hwnd, &top_left); | |
| 156 | |
| 157 *x_left = target->location_.x + top_left.x; | |
| 158 *y_top = target->location_.y + top_left.y; | |
| 159 *width = target->location_.width; | |
| 160 *height = target->location_.height; | |
| 161 | |
| 162 return S_OK; | |
| 163 } | |
| 164 | |
| 165 STDMETHODIMP BrowserAccessibility::accNavigate( | |
| 166 LONG nav_dir, VARIANT start, VARIANT* end) { | |
| 167 BrowserAccessibility* target = GetTargetFromChildID(start); | |
| 168 if (!target) | |
| 169 return E_INVALIDARG; | |
| 170 | |
| 171 if ((nav_dir == NAVDIR_LASTCHILD || nav_dir == NAVDIR_FIRSTCHILD) && | |
| 172 start.lVal != CHILDID_SELF) { | |
| 173 // MSAA states that navigating to first/last child can only be from self. | |
| 174 return E_INVALIDARG; | |
| 175 } | |
| 176 | |
| 177 BrowserAccessibility* result = NULL; | |
| 178 switch (nav_dir) { | |
| 179 case NAVDIR_DOWN: | |
| 180 case NAVDIR_UP: | |
| 181 case NAVDIR_LEFT: | |
| 182 case NAVDIR_RIGHT: | |
| 183 // These directions are not implemented, matching Mozilla and IE. | |
| 184 return E_NOTIMPL; | |
| 185 case NAVDIR_FIRSTCHILD: | |
| 186 if (target->children_.size() > 0) | |
| 187 result = target->children_[0]; | |
| 188 break; | |
| 189 case NAVDIR_LASTCHILD: | |
| 190 if (target->children_.size() > 0) | |
| 191 result = target->children_[target->children_.size() - 1]; | |
| 192 break; | |
| 193 case NAVDIR_NEXT: | |
| 194 result = target->GetNextSibling(); | |
| 195 break; | |
| 196 case NAVDIR_PREVIOUS: | |
| 197 result = target->GetPreviousSibling(); | |
| 198 break; | |
| 199 } | |
| 200 | |
| 201 if (!result) { | |
| 202 end->vt = VT_EMPTY; | |
| 203 return S_FALSE; | |
| 204 } | |
| 205 | |
| 206 end->vt = VT_DISPATCH; | |
| 207 end->pdispVal = result->NewReference(); | |
| 208 return S_OK; | |
| 209 } | |
| 210 | |
| 211 STDMETHODIMP BrowserAccessibility::get_accChild(VARIANT var_child, | |
| 212 IDispatch** disp_child) { | |
| 213 if (!instance_active_) | |
| 214 return E_FAIL; | |
| 215 | |
| 216 if (!disp_child) | |
| 217 return E_INVALIDARG; | |
| 218 | |
| 219 *disp_child = NULL; | |
| 220 | |
| 221 BrowserAccessibility* target = GetTargetFromChildID(var_child); | |
| 222 if (!target) | |
| 223 return E_INVALIDARG; | |
| 224 | |
| 225 (*disp_child) = target->NewReference(); | |
| 226 return S_OK; | |
| 227 } | |
| 228 | |
| 229 STDMETHODIMP BrowserAccessibility::get_accChildCount(LONG* child_count) { | |
| 230 if (!instance_active_) | |
| 231 return E_FAIL; | |
| 232 | |
| 233 if (!child_count) | |
| 234 return E_INVALIDARG; | |
| 235 | |
| 236 *child_count = children_.size(); | |
| 237 return S_OK; | |
| 238 } | |
| 239 | |
| 240 STDMETHODIMP BrowserAccessibility::get_accDefaultAction(VARIANT var_id, | |
| 241 BSTR* def_action) { | |
| 242 if (!instance_active_) | |
| 243 return E_FAIL; | |
| 244 | |
| 245 if (!def_action) | |
| 246 return E_INVALIDARG; | |
| 247 | |
| 248 BrowserAccessibility* target = GetTargetFromChildID(var_id); | |
| 249 if (!target) | |
| 250 return E_INVALIDARG; | |
| 251 | |
| 252 string16 action; | |
| 253 if (!target->GetAttribute(WebAccessibility::ATTR_SHORTCUT, &action)) | |
| 254 return S_FALSE; | |
| 255 | |
| 256 if (action.empty()) | |
| 257 return S_FALSE; | |
| 258 | |
| 259 *def_action = SysAllocString(action.c_str()); | |
| 260 | |
| 261 DCHECK(*def_action); | |
| 262 return S_OK; | |
| 263 } | |
| 264 | |
| 265 STDMETHODIMP BrowserAccessibility::get_accDescription(VARIANT var_id, | |
| 266 BSTR* desc) { | |
| 267 if (!instance_active_) | |
| 268 return E_FAIL; | |
| 269 | |
| 270 if (!desc) | |
| 271 return E_INVALIDARG; | |
| 272 | |
| 273 BrowserAccessibility* target = GetTargetFromChildID(var_id); | |
| 274 if (!target) | |
| 275 return E_INVALIDARG; | |
| 276 | |
| 277 string16 description; | |
| 278 if (!target->GetAttribute(WebAccessibility::ATTR_DESCRIPTION, &description)) | |
| 279 return S_FALSE; | |
| 280 | |
| 281 if (description.empty()) | |
| 282 return S_FALSE; | |
| 283 | |
| 284 *desc = SysAllocString(description.c_str()); | |
| 285 | |
| 286 DCHECK(*desc); | |
| 287 return S_OK; | |
| 288 } | |
| 289 | |
| 290 STDMETHODIMP BrowserAccessibility::get_accFocus(VARIANT* focus_child) { | |
| 291 if (!instance_active_) | |
| 292 return E_FAIL; | |
| 293 | |
| 294 if (!focus_child) | |
| 295 return E_INVALIDARG; | |
| 296 | |
| 297 BrowserAccessibility* focus = manager_->GetFocus(this); | |
| 298 if (focus == this) { | |
| 299 focus_child->vt = VT_I4; | |
| 300 focus_child->lVal = CHILDID_SELF; | |
| 301 } else if (focus == NULL) { | |
| 302 focus_child->vt = VT_EMPTY; | |
| 303 } else { | |
| 304 focus_child->vt = VT_DISPATCH; | |
| 305 focus_child->pdispVal = focus->NewReference(); | |
| 306 } | |
| 307 | |
| 308 return S_OK; | |
| 309 } | |
| 310 | |
| 311 STDMETHODIMP BrowserAccessibility::get_accHelp(VARIANT var_id, BSTR* help) { | |
| 312 if (!instance_active_) | |
| 313 return E_FAIL; | |
| 314 | |
| 315 if (!help) | |
| 316 return E_INVALIDARG; | |
| 317 | |
| 318 BrowserAccessibility* target = GetTargetFromChildID(var_id); | |
| 319 if (!target) | |
| 320 return E_INVALIDARG; | |
| 321 | |
| 322 string16 help_str; | |
| 323 if (!target->GetAttribute(WebAccessibility::ATTR_HELP, &help_str)) | |
| 324 return S_FALSE; | |
| 325 | |
| 326 if (help_str.empty()) | |
| 327 return S_FALSE; | |
| 328 | |
| 329 *help = SysAllocString(help_str.c_str()); | |
| 330 | |
| 331 DCHECK(*help); | |
| 332 return S_OK; | |
| 333 } | |
| 334 | |
| 335 STDMETHODIMP BrowserAccessibility::get_accKeyboardShortcut(VARIANT var_id, | |
| 336 BSTR* acc_key) { | |
| 337 if (!instance_active_) | |
| 338 return E_FAIL; | |
| 339 | |
| 340 if (!acc_key) | |
| 341 return E_INVALIDARG; | |
| 342 | |
| 343 BrowserAccessibility* target = GetTargetFromChildID(var_id); | |
| 344 if (!target) | |
| 345 return E_INVALIDARG; | |
| 346 | |
| 347 string16 shortcut; | |
| 348 if (!target->GetAttribute(WebAccessibility::ATTR_SHORTCUT, &shortcut)) | |
| 349 return S_FALSE; | |
| 350 | |
| 351 if (shortcut.empty()) | |
| 352 return S_FALSE; | |
| 353 | |
| 354 *acc_key = SysAllocString(shortcut.c_str()); | |
| 355 | |
| 356 DCHECK(*acc_key); | |
| 357 return S_OK; | |
| 358 } | |
| 359 | |
| 360 STDMETHODIMP BrowserAccessibility::get_accName(VARIANT var_id, BSTR* name) { | |
| 361 if (!instance_active_) | |
| 362 return E_FAIL; | |
| 363 | |
| 364 if (!name) | |
| 365 return E_INVALIDARG; | |
| 366 | |
| 367 BrowserAccessibility* target = GetTargetFromChildID(var_id); | |
| 368 if (!target) | |
| 369 return E_INVALIDARG; | |
| 370 | |
| 371 if (target->name_.empty()) | |
| 372 return S_FALSE; | |
| 373 | |
| 374 *name = SysAllocString(target->name_.c_str()); | |
| 375 | |
| 376 DCHECK(*name); | |
| 377 return S_OK; | |
| 378 } | |
| 379 | |
| 380 STDMETHODIMP BrowserAccessibility::get_accParent(IDispatch** disp_parent) { | |
| 381 if (!instance_active_) | |
| 382 return E_FAIL; | |
| 383 | |
| 384 if (!disp_parent) | |
| 385 return E_INVALIDARG; | |
| 386 | |
| 387 IAccessible* parent = parent_; | |
| 388 if (parent == NULL) { | |
| 389 // This happens if we're the root of the tree; | |
| 390 // return the IAccessible for the window. | |
| 391 parent = manager_->GetParentWindowIAccessible(); | |
| 392 } | |
| 393 | |
| 394 parent->AddRef(); | |
| 395 *disp_parent = parent; | |
| 396 return S_OK; | |
| 397 } | |
| 398 | |
| 399 STDMETHODIMP BrowserAccessibility::get_accRole(VARIANT var_id, VARIANT* role) { | |
| 400 if (!instance_active_) | |
| 401 return E_FAIL; | |
| 402 | |
| 403 if (!role) | |
| 404 return E_INVALIDARG; | |
| 405 | |
| 406 BrowserAccessibility* target = GetTargetFromChildID(var_id); | |
| 407 if (!target) | |
| 408 return E_INVALIDARG; | |
| 409 | |
| 410 if (!target->role_name_.empty()) { | |
| 411 role->vt = VT_BSTR; | |
| 412 role->bstrVal = SysAllocString(target->role_name_.c_str()); | |
| 413 } else { | |
| 414 role->vt = VT_I4; | |
| 415 role->lVal = target->role_; | |
| 416 } | |
| 417 return S_OK; | |
| 418 } | |
| 419 | |
| 420 STDMETHODIMP BrowserAccessibility::get_accState(VARIANT var_id, | |
| 421 VARIANT* state) { | |
| 422 if (!instance_active_) | |
| 423 return E_FAIL; | |
| 424 | |
| 425 if (!state) | |
| 426 return E_INVALIDARG; | |
| 427 | |
| 428 BrowserAccessibility* target = GetTargetFromChildID(var_id); | |
| 429 if (!target) | |
| 430 return E_INVALIDARG; | |
| 431 | |
| 432 state->vt = VT_I4; | |
| 433 state->lVal = target->state_; | |
| 434 if (manager_->GetFocus(NULL) == this) | |
| 435 state->lVal |= STATE_SYSTEM_FOCUSED; | |
| 436 | |
| 437 return S_OK; | |
| 438 } | |
| 439 | |
| 440 STDMETHODIMP BrowserAccessibility::get_accValue(VARIANT var_id, BSTR* value) { | |
| 441 if (!instance_active_) | |
| 442 return E_FAIL; | |
| 443 | |
| 444 if (!value) | |
| 445 return E_INVALIDARG; | |
| 446 | |
| 447 BrowserAccessibility* target = GetTargetFromChildID(var_id); | |
| 448 if (!target) | |
| 449 return E_INVALIDARG; | |
| 450 | |
| 451 *value = SysAllocString(target->value_.c_str()); | |
| 452 | |
| 453 DCHECK(*value); | |
| 454 return S_OK; | |
| 455 } | |
| 456 | |
| 457 STDMETHODIMP BrowserAccessibility::get_accHelpTopic(BSTR* help_file, | |
| 458 VARIANT var_id, | |
| 459 LONG* topic_id) { | |
| 460 return E_NOTIMPL; | |
| 461 } | |
| 462 | |
| 463 STDMETHODIMP BrowserAccessibility::get_accSelection(VARIANT* selected) { | |
| 464 if (!instance_active_) | |
| 465 return E_FAIL; | |
| 466 | |
| 467 return E_NOTIMPL; | |
| 468 } | |
| 469 | |
| 470 STDMETHODIMP BrowserAccessibility::accSelect(LONG flags_sel, VARIANT var_id) { | |
| 471 if (!instance_active_) | |
| 472 return E_FAIL; | |
| 473 | |
| 474 if (flags_sel & SELFLAG_TAKEFOCUS) { | |
| 475 manager_->SetFocus(*this); | |
| 476 return S_OK; | |
| 477 } | |
| 478 | |
| 479 return S_FALSE; | |
| 480 } | |
| 481 | |
| 482 // | |
| 483 // IAccessible2 methods. | |
| 484 // | |
| 485 | |
| 486 STDMETHODIMP BrowserAccessibility::role(LONG* role) { | |
| 487 if (!instance_active_) | |
| 488 return E_FAIL; | |
| 489 | |
| 490 if (!role) | |
| 491 return E_INVALIDARG; | |
| 492 | |
| 493 *role = ia2_role_; | |
| 494 | |
| 495 return S_OK; | |
| 496 } | |
| 497 | |
| 498 STDMETHODIMP BrowserAccessibility::get_attributes(BSTR* attributes) { | |
| 499 if (!instance_active_) | |
| 500 return E_FAIL; | |
| 501 | |
| 502 if (!attributes) | |
| 503 return E_INVALIDARG; | |
| 504 | |
| 505 return S_FALSE; | |
| 506 } | |
| 507 | |
| 508 STDMETHODIMP BrowserAccessibility::get_states(AccessibleStates* states) { | |
| 509 if (!instance_active_) | |
| 510 return E_FAIL; | |
| 511 | |
| 512 if (!states) | |
| 513 return E_INVALIDARG; | |
| 514 | |
| 515 *states = ia2_state_; | |
| 516 | |
| 517 return S_OK; | |
| 518 } | |
| 519 | |
| 520 STDMETHODIMP BrowserAccessibility::get_uniqueID(LONG* unique_id) { | |
| 521 if (!instance_active_) | |
| 522 return E_FAIL; | |
| 523 | |
| 524 if (!unique_id) | |
| 525 return E_INVALIDARG; | |
| 526 | |
| 527 *unique_id = child_id_; | |
| 528 return S_OK; | |
| 529 } | |
| 530 | |
| 531 STDMETHODIMP BrowserAccessibility::get_windowHandle(HWND* window_handle) { | |
| 532 if (!instance_active_) | |
| 533 return E_FAIL; | |
| 534 | |
| 535 if (!window_handle) | |
| 536 return E_INVALIDARG; | |
| 537 | |
| 538 *window_handle = manager_->GetParentHWND(); | |
| 539 return S_OK; | |
| 540 } | |
| 541 | |
| 542 STDMETHODIMP BrowserAccessibility::get_indexInParent(LONG* index_in_parent) { | |
| 543 if (!instance_active_) | |
| 544 return E_FAIL; | |
| 545 | |
| 546 if (!index_in_parent) | |
| 547 return E_INVALIDARG; | |
| 548 | |
| 549 *index_in_parent = index_in_parent_; | |
| 550 return S_OK; | |
| 551 } | |
| 552 | |
| 553 // | |
| 554 // IAccessibleImage methods. | |
| 555 // | |
| 556 | |
| 557 STDMETHODIMP BrowserAccessibility::get_description(BSTR* desc) { | |
| 558 if (!instance_active_) | |
| 559 return E_FAIL; | |
| 560 | |
| 561 if (!desc) | |
| 562 return E_INVALIDARG; | |
| 563 | |
| 564 string16 description; | |
| 565 if (!GetAttribute(WebAccessibility::ATTR_DESCRIPTION, &description)) | |
| 566 return S_FALSE; | |
| 567 | |
| 568 if (description.empty()) | |
| 569 return S_FALSE; | |
| 570 | |
| 571 *desc = SysAllocString(description.c_str()); | |
| 572 | |
| 573 DCHECK(*desc); | |
| 574 return S_OK; | |
| 575 } | |
| 576 | |
| 577 STDMETHODIMP BrowserAccessibility::get_imagePosition( | |
| 578 enum IA2CoordinateType coordinate_type, long* x, long* y) { | |
| 579 if (!instance_active_) | |
| 580 return E_FAIL; | |
| 581 | |
| 582 if (!x || !y) | |
| 583 return E_INVALIDARG; | |
| 584 | |
| 585 if (coordinate_type == IA2_COORDTYPE_SCREEN_RELATIVE) { | |
| 586 HWND parent_hwnd = manager_->GetParentHWND(); | |
| 587 POINT top_left = {0, 0}; | |
| 588 ::ClientToScreen(parent_hwnd, &top_left); | |
| 589 *x = location_.x + top_left.x; | |
| 590 *y = location_.y + top_left.y; | |
| 591 } else if (coordinate_type == IA2_COORDTYPE_PARENT_RELATIVE) { | |
| 592 *x = location_.x; | |
| 593 *y = location_.y; | |
| 594 if (parent_) { | |
| 595 *x -= parent_->location_.x; | |
| 596 *y -= parent_->location_.y; | |
| 597 } | |
| 598 } else { | |
| 599 return E_INVALIDARG; | |
| 600 } | |
| 601 | |
| 602 return S_OK; | |
| 603 } | |
| 604 | |
| 605 STDMETHODIMP BrowserAccessibility::get_imageSize(long* height, long* width) { | |
| 606 if (!instance_active_) | |
| 607 return E_FAIL; | |
| 608 | |
| 609 if (!height || !width) | |
| 610 return E_INVALIDARG; | |
| 611 | |
| 612 *height = location_.height; | |
| 613 *width = location_.width; | |
| 614 return S_OK; | |
| 615 } | |
| 616 | |
| 617 // | |
| 618 // IAccessibleText methods. | |
| 619 // | |
| 620 | |
| 621 STDMETHODIMP BrowserAccessibility::get_nCharacters(long* n_characters) { | |
| 622 if (!instance_active_) | |
| 623 return E_FAIL; | |
| 624 | |
| 625 if (!n_characters) | |
| 626 return E_INVALIDARG; | |
| 627 | |
| 628 *n_characters = name_.length(); | |
| 629 return S_OK; | |
| 630 } | |
| 631 | |
| 632 STDMETHODIMP BrowserAccessibility::get_text( | |
| 633 long start_offset, long end_offset, BSTR* text) { | |
| 634 if (!instance_active_) | |
| 635 return E_FAIL; | |
| 636 | |
| 637 if (!text) | |
| 638 return E_INVALIDARG; | |
| 639 | |
| 640 long len = name_.length(); | |
| 641 if (start_offset < 0) | |
| 642 start_offset = 0; | |
| 643 if (end_offset > len) | |
| 644 end_offset = len; | |
| 645 | |
| 646 *text = SysAllocString( | |
| 647 name_.substr(start_offset, end_offset - start_offset).c_str()); | |
| 648 return S_OK; | |
| 649 } | |
| 650 | |
| 651 STDMETHODIMP BrowserAccessibility::get_caretOffset(long* offset) { | |
| 652 *offset = 0; | |
| 653 return S_OK; | |
| 654 } | |
| 655 | |
| 656 // | |
| 657 // IServiceProvider methods. | |
| 658 // | |
| 659 | |
| 660 STDMETHODIMP BrowserAccessibility::QueryService( | |
| 661 REFGUID guidService, REFIID riid, void** object) { | |
| 662 if (!instance_active_) | |
| 663 return E_FAIL; | |
| 664 | |
| 665 if (guidService == IID_IAccessible || guidService == IID_IAccessible2) | |
| 666 return QueryInterface(riid, object); | |
| 667 | |
| 668 *object = NULL; | |
| 669 return E_FAIL; | |
| 670 } | |
| 671 | |
| 672 // | |
| 673 // CComObjectRootEx methods. | |
| 674 // | |
| 675 | |
| 676 HRESULT WINAPI BrowserAccessibility::InternalQueryInterface( | |
| 677 void* this_ptr, | |
| 678 const _ATL_INTMAP_ENTRY* entries, | |
| 679 REFIID iid, | |
| 680 void** object) { | |
| 681 if (iid == IID_IAccessibleText) { | |
| 682 if (role_ != ROLE_SYSTEM_LINK) { | |
| 683 *object = NULL; | |
| 684 return E_NOINTERFACE; | |
| 685 } | |
| 686 } else if (iid == IID_IAccessibleImage) { | |
| 687 if (role_ != ROLE_SYSTEM_GRAPHIC) { | |
| 688 *object = NULL; | |
| 689 return E_NOINTERFACE; | |
| 690 } | |
| 691 } | |
| 692 | |
| 693 return CComObjectRootBase::InternalQueryInterface( | |
| 694 this_ptr, entries, iid, object); | |
| 695 } | |
| 696 | |
| 697 // | |
| 698 // Private methods. | |
| 699 // | |
| 700 | |
| 701 BrowserAccessibility* BrowserAccessibility::GetTargetFromChildID( | |
| 702 const VARIANT& var_id) { | |
| 703 if (var_id.vt != VT_I4) | |
| 704 return NULL; | |
| 705 | |
| 706 LONG child_id = var_id.lVal; | |
| 707 if (child_id == CHILDID_SELF) | |
| 708 return this; | |
| 709 | |
| 710 if (child_id >= 1 && child_id <= static_cast<LONG>(children_.size())) | |
| 711 return children_[child_id - 1]; | |
| 712 | |
| 713 return manager_->GetFromChildID(child_id); | |
| 714 } | |
| 715 | |
| 716 bool BrowserAccessibility::HasAttribute(WebAccessibility::Attribute attribute) { | |
| 717 return (attributes_.find(attribute) != attributes_.end()); | |
| 718 } | |
| 719 | |
| 720 bool BrowserAccessibility::GetAttribute( | |
| 721 WebAccessibility::Attribute attribute, string16* value) { | |
| 722 std::map<int32, string16>::iterator iter = attributes_.find(attribute); | |
| 723 if (iter != attributes_.end()) { | |
| 724 *value = iter->second; | |
| 725 return true; | |
| 726 } | |
| 727 | |
| 728 return false; | |
| 729 } | |
| 730 | |
| 731 void BrowserAccessibility::InitRoleAndState(LONG web_role, | |
| 732 LONG web_state) { | |
| 733 state_ = 0; | |
| 734 ia2_state_ = IA2_STATE_OPAQUE; | |
| 735 | |
| 736 if ((web_state >> WebAccessibility::STATE_CHECKED) & 1) | |
| 737 state_ |= STATE_SYSTEM_CHECKED; | |
| 738 if ((web_state >> WebAccessibility::STATE_FOCUSABLE) & 1) | |
| 739 state_ |= STATE_SYSTEM_FOCUSABLE; | |
| 740 if ((web_state >> WebAccessibility::STATE_HOTTRACKED) & 1) | |
| 741 state_ |= STATE_SYSTEM_HOTTRACKED; | |
| 742 if ((web_state >> WebAccessibility::STATE_INDETERMINATE) & 1) | |
| 743 state_ |= STATE_SYSTEM_INDETERMINATE; | |
| 744 if ((web_state >> WebAccessibility::STATE_LINKED) & 1) | |
| 745 state_ |= STATE_SYSTEM_LINKED; | |
| 746 if ((web_state >> WebAccessibility::STATE_MULTISELECTABLE) & 1) | |
| 747 state_ |= STATE_SYSTEM_MULTISELECTABLE; | |
| 748 if ((web_state >> WebAccessibility::STATE_OFFSCREEN) & 1) | |
| 749 state_ |= STATE_SYSTEM_OFFSCREEN; | |
| 750 if ((web_state >> WebAccessibility::STATE_PRESSED) & 1) | |
| 751 state_ |= STATE_SYSTEM_PRESSED; | |
| 752 if ((web_state >> WebAccessibility::STATE_PROTECTED) & 1) | |
| 753 state_ |= STATE_SYSTEM_PROTECTED; | |
| 754 if ((web_state >> WebAccessibility::STATE_READONLY) & 1) | |
| 755 state_ |= STATE_SYSTEM_READONLY; | |
| 756 if ((web_state >> WebAccessibility::STATE_TRAVERSED) & 1) | |
| 757 state_ |= STATE_SYSTEM_TRAVERSED; | |
| 758 if ((web_state >> WebAccessibility::STATE_UNAVAILABLE) & 1) | |
| 759 state_ |= STATE_SYSTEM_UNAVAILABLE; | |
| 760 | |
| 761 role_ = 0; | |
| 762 ia2_role_ = 0; | |
| 763 switch (web_role) { | |
| 764 case WebAccessibility::ROLE_ALERT: | |
| 765 case WebAccessibility::ROLE_ALERT_DIALOG: | |
| 766 role_ = ROLE_SYSTEM_ALERT; | |
| 767 break; | |
| 768 case WebAccessibility::ROLE_APPLICATION: | |
| 769 role_ = ROLE_SYSTEM_APPLICATION; | |
| 770 break; | |
| 771 case WebAccessibility::ROLE_ARTICLE: | |
| 772 role_ = ROLE_SYSTEM_GROUPING; | |
| 773 ia2_role_ = IA2_ROLE_SECTION; | |
| 774 break; | |
| 775 case WebAccessibility::ROLE_BUTTON: | |
| 776 role_ = ROLE_SYSTEM_PUSHBUTTON; | |
| 777 break; | |
| 778 case WebAccessibility::ROLE_CELL: | |
| 779 role_ = ROLE_SYSTEM_CELL; | |
| 780 break; | |
| 781 case WebAccessibility::ROLE_CHECKBOX: | |
| 782 role_ = ROLE_SYSTEM_CHECKBUTTON; | |
| 783 break; | |
| 784 case WebAccessibility::ROLE_COLOR_WELL: | |
| 785 role_ = ROLE_SYSTEM_CLIENT; | |
| 786 ia2_role_ = IA2_ROLE_COLOR_CHOOSER; | |
| 787 break; | |
| 788 case WebAccessibility::ROLE_COLUMN: | |
| 789 role_ = ROLE_SYSTEM_COLUMN; | |
| 790 break; | |
| 791 case WebAccessibility::ROLE_COLUMN_HEADER: | |
| 792 role_ = ROLE_SYSTEM_COLUMNHEADER; | |
| 793 break; | |
| 794 case WebAccessibility::ROLE_COMBO_BOX: | |
| 795 role_ = ROLE_SYSTEM_COMBOBOX; | |
| 796 break; | |
| 797 case WebAccessibility::ROLE_DEFINITION_LIST_DEFINITION: | |
| 798 role_name_ = L"dd"; | |
| 799 ia2_role_ = IA2_ROLE_PARAGRAPH; | |
| 800 break; | |
| 801 case WebAccessibility::ROLE_DEFINITION_LIST_TERM: | |
| 802 role_ = ROLE_SYSTEM_LISTITEM; | |
| 803 break; | |
| 804 case WebAccessibility::ROLE_DIALOG: | |
| 805 role_ = ROLE_SYSTEM_DIALOG; | |
| 806 break; | |
| 807 case WebAccessibility::ROLE_DOCUMENT: | |
| 808 case WebAccessibility::ROLE_WEB_AREA: | |
| 809 role_ = ROLE_SYSTEM_DOCUMENT; | |
| 810 state_ |= STATE_SYSTEM_READONLY; | |
| 811 state_ |= STATE_SYSTEM_FOCUSABLE; | |
| 812 break; | |
| 813 case WebAccessibility::ROLE_EDITABLE_TEXT: | |
| 814 role_ = ROLE_SYSTEM_TEXT; | |
| 815 ia2_state_ |= IA2_STATE_SINGLE_LINE; | |
| 816 ia2_state_ |= IA2_STATE_EDITABLE; | |
| 817 break; | |
| 818 case WebAccessibility::ROLE_GRID: | |
| 819 role_ = ROLE_SYSTEM_TABLE; | |
| 820 break; | |
| 821 case WebAccessibility::ROLE_GROUP: | |
| 822 role_name_ = L"div"; | |
| 823 ia2_role_ = IA2_ROLE_SECTION; | |
| 824 break; | |
| 825 case WebAccessibility::ROLE_HEADING: | |
| 826 // TODO(dmazzoni): support all heading levels | |
| 827 role_name_ = L"h1"; | |
| 828 ia2_role_ = IA2_ROLE_HEADING; | |
| 829 break; | |
| 830 case WebAccessibility::ROLE_IMAGE: | |
| 831 role_ = ROLE_SYSTEM_GRAPHIC; | |
| 832 break; | |
| 833 case WebAccessibility::ROLE_IMAGE_MAP: | |
| 834 role_name_ = L"map"; | |
| 835 ia2_role_ = IA2_ROLE_IMAGE_MAP; | |
| 836 break; | |
| 837 case WebAccessibility::ROLE_IMAGE_MAP_LINK: | |
| 838 role_ = ROLE_SYSTEM_LINK; | |
| 839 state_ |= STATE_SYSTEM_LINKED; | |
| 840 break; | |
| 841 case WebAccessibility::ROLE_LANDMARK_APPLICATION: | |
| 842 case WebAccessibility::ROLE_LANDMARK_BANNER: | |
| 843 case WebAccessibility::ROLE_LANDMARK_COMPLEMENTARY: | |
| 844 case WebAccessibility::ROLE_LANDMARK_CONTENTINFO: | |
| 845 case WebAccessibility::ROLE_LANDMARK_MAIN: | |
| 846 case WebAccessibility::ROLE_LANDMARK_NAVIGATION: | |
| 847 case WebAccessibility::ROLE_LANDMARK_SEARCH: | |
| 848 role_ = ROLE_SYSTEM_GROUPING; | |
| 849 ia2_role_ = IA2_ROLE_SECTION; | |
| 850 break; | |
| 851 case WebAccessibility::ROLE_LINK: | |
| 852 case WebAccessibility::ROLE_WEBCORE_LINK: | |
| 853 role_ = ROLE_SYSTEM_LINK; | |
| 854 state_ |= STATE_SYSTEM_LINKED; | |
| 855 break; | |
| 856 case WebAccessibility::ROLE_LIST: | |
| 857 role_ = ROLE_SYSTEM_LIST; | |
| 858 break; | |
| 859 case WebAccessibility::ROLE_LISTBOX: | |
| 860 role_ = ROLE_SYSTEM_LIST; | |
| 861 break; | |
| 862 case WebAccessibility::ROLE_LISTBOX_OPTION: | |
| 863 case WebAccessibility::ROLE_LIST_ITEM: | |
| 864 case WebAccessibility::ROLE_LIST_MARKER: | |
| 865 role_ = ROLE_SYSTEM_LISTITEM; | |
| 866 break; | |
| 867 case WebAccessibility::ROLE_MENU: | |
| 868 case WebAccessibility::ROLE_MENU_BUTTON: | |
| 869 role_ = ROLE_SYSTEM_MENUPOPUP; | |
| 870 break; | |
| 871 case WebAccessibility::ROLE_MENU_BAR: | |
| 872 role_ = ROLE_SYSTEM_MENUBAR; | |
| 873 break; | |
| 874 case WebAccessibility::ROLE_MENU_ITEM: | |
| 875 case WebAccessibility::ROLE_MENU_LIST_OPTION: | |
| 876 role_ = ROLE_SYSTEM_MENUITEM; | |
| 877 break; | |
| 878 case WebAccessibility::ROLE_MENU_LIST_POPUP: | |
| 879 role_ = ROLE_SYSTEM_MENUPOPUP; | |
| 880 break; | |
| 881 case WebAccessibility::ROLE_NOTE: | |
| 882 role_ = ROLE_SYSTEM_GROUPING; | |
| 883 ia2_role_ = IA2_ROLE_NOTE; | |
| 884 break; | |
| 885 case WebAccessibility::ROLE_OUTLINE: | |
| 886 role_ = ROLE_SYSTEM_OUTLINE; | |
| 887 break; | |
| 888 case WebAccessibility::ROLE_POPUP_BUTTON: | |
| 889 role_ = ROLE_SYSTEM_COMBOBOX; | |
| 890 break; | |
| 891 case WebAccessibility::ROLE_PROGRESS_INDICATOR: | |
| 892 role_ = ROLE_SYSTEM_PROGRESSBAR; | |
| 893 break; | |
| 894 case WebAccessibility::ROLE_RADIO_BUTTON: | |
| 895 role_ = ROLE_SYSTEM_RADIOBUTTON; | |
| 896 break; | |
| 897 case WebAccessibility::ROLE_RADIO_GROUP: | |
| 898 role_ = ROLE_SYSTEM_GROUPING; | |
| 899 ia2_role_ = IA2_ROLE_SECTION; | |
| 900 break; | |
| 901 case WebAccessibility::ROLE_REGION: | |
| 902 role_ = ROLE_SYSTEM_GROUPING; | |
| 903 ia2_role_ = IA2_ROLE_SECTION; | |
| 904 break; | |
| 905 case WebAccessibility::ROLE_ROW: | |
| 906 role_ = ROLE_SYSTEM_ROW; | |
| 907 break; | |
| 908 case WebAccessibility::ROLE_ROW_HEADER: | |
| 909 role_ = ROLE_SYSTEM_ROWHEADER; | |
| 910 break; | |
| 911 case WebAccessibility::ROLE_RULER: | |
| 912 role_ = ROLE_SYSTEM_CLIENT; | |
| 913 ia2_role_ = IA2_ROLE_RULER; | |
| 914 break; | |
| 915 case WebAccessibility::ROLE_SCROLLAREA: | |
| 916 role_ = ROLE_SYSTEM_CLIENT; | |
| 917 ia2_role_ = IA2_ROLE_SCROLL_PANE; | |
| 918 break; | |
| 919 case WebAccessibility::ROLE_SCROLLBAR: | |
| 920 role_ = ROLE_SYSTEM_SCROLLBAR; | |
| 921 break; | |
| 922 case WebAccessibility::ROLE_SLIDER: | |
| 923 role_ = ROLE_SYSTEM_SLIDER; | |
| 924 break; | |
| 925 case WebAccessibility::ROLE_SPLIT_GROUP: | |
| 926 role_ = ROLE_SYSTEM_CLIENT; | |
| 927 ia2_role_ = IA2_ROLE_SPLIT_PANE; | |
| 928 break; | |
| 929 case WebAccessibility::ROLE_ANNOTATION: | |
| 930 case WebAccessibility::ROLE_STATIC_TEXT: | |
| 931 role_ = ROLE_SYSTEM_TEXT; | |
| 932 break; | |
| 933 case WebAccessibility::ROLE_STATUS: | |
| 934 role_ = ROLE_SYSTEM_STATUSBAR; | |
| 935 break; | |
| 936 case WebAccessibility::ROLE_TAB: | |
| 937 role_ = ROLE_SYSTEM_PAGETAB; | |
| 938 break; | |
| 939 case WebAccessibility::ROLE_TABLE: | |
| 940 role_ = ROLE_SYSTEM_TABLE; | |
| 941 break; | |
| 942 case WebAccessibility::ROLE_TABLE_HEADER_CONTAINER: | |
| 943 role_ = ROLE_SYSTEM_GROUPING; | |
| 944 ia2_role_ = IA2_ROLE_SECTION; | |
| 945 break; | |
| 946 case WebAccessibility::ROLE_TAB_GROUP: | |
| 947 case WebAccessibility::ROLE_TAB_LIST: | |
| 948 case WebAccessibility::ROLE_TAB_PANEL: | |
| 949 role_ = ROLE_SYSTEM_PAGETABLIST; | |
| 950 break; | |
| 951 case WebAccessibility::ROLE_TEXTAREA: | |
| 952 role_ = ROLE_SYSTEM_TEXT; | |
| 953 ia2_state_ |= IA2_STATE_MULTI_LINE; | |
| 954 ia2_state_ |= IA2_STATE_EDITABLE; | |
| 955 break; | |
| 956 case WebAccessibility::ROLE_TEXT_FIELD: | |
| 957 role_ = ROLE_SYSTEM_TEXT; | |
| 958 ia2_state_ |= IA2_STATE_SINGLE_LINE; | |
| 959 ia2_state_ |= IA2_STATE_EDITABLE; | |
| 960 break; | |
| 961 case WebAccessibility::ROLE_TOOLBAR: | |
| 962 role_ = ROLE_SYSTEM_TOOLBAR; | |
| 963 break; | |
| 964 case WebAccessibility::ROLE_TOOLTIP: | |
| 965 role_ = ROLE_SYSTEM_TOOLTIP; | |
| 966 break; | |
| 967 case WebAccessibility::ROLE_TREE: | |
| 968 role_ = ROLE_SYSTEM_OUTLINE; | |
| 969 break; | |
| 970 case WebAccessibility::ROLE_TREE_GRID: | |
| 971 role_ = ROLE_SYSTEM_OUTLINE; | |
| 972 break; | |
| 973 case WebAccessibility::ROLE_TREE_ITEM: | |
| 974 role_ = ROLE_SYSTEM_OUTLINEITEM; | |
| 975 break; | |
| 976 case WebAccessibility::ROLE_WINDOW: | |
| 977 role_ = ROLE_SYSTEM_WINDOW; | |
| 978 break; | |
| 979 | |
| 980 // TODO(dmazzoni): figure out the proper MSAA role for all of these. | |
| 981 case WebAccessibility::ROLE_BROWSER: | |
| 982 case WebAccessibility::ROLE_BUSY_INDICATOR: | |
| 983 case WebAccessibility::ROLE_DIRECTORY: | |
| 984 case WebAccessibility::ROLE_DISCLOSURE_TRIANGLE: | |
| 985 case WebAccessibility::ROLE_DRAWER: | |
| 986 case WebAccessibility::ROLE_GROW_AREA: | |
| 987 case WebAccessibility::ROLE_HELP_TAG: | |
| 988 case WebAccessibility::ROLE_IGNORED: | |
| 989 case WebAccessibility::ROLE_INCREMENTOR: | |
| 990 case WebAccessibility::ROLE_LOG: | |
| 991 case WebAccessibility::ROLE_MARQUEE: | |
| 992 case WebAccessibility::ROLE_MATH: | |
| 993 case WebAccessibility::ROLE_MATTE: | |
| 994 case WebAccessibility::ROLE_RULER_MARKER: | |
| 995 case WebAccessibility::ROLE_SHEET: | |
| 996 case WebAccessibility::ROLE_SLIDER_THUMB: | |
| 997 case WebAccessibility::ROLE_SPLITTER: | |
| 998 case WebAccessibility::ROLE_SYSTEM_WIDE: | |
| 999 case WebAccessibility::ROLE_TIMER: | |
| 1000 case WebAccessibility::ROLE_VALUE_INDICATOR: | |
| 1001 default: | |
| 1002 role_ = ROLE_SYSTEM_CLIENT; | |
| 1003 break; | |
| 1004 } | |
| 1005 | |
| 1006 // The role should always be set. | |
| 1007 DCHECK(!role_name_.empty() || role_); | |
| 1008 | |
| 1009 // If we didn't explicitly set the IAccessible2 role, make it the same | |
| 1010 // as the MSAA role. | |
| 1011 if (!ia2_role_) | |
| 1012 ia2_role_ = role_; | |
| 1013 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2830005:
Rename browser_accessibility to browser_accessibility_win, and same for... (Closed)
Base URL: svn://chrome-svn/chrome/trunk/src/