| OLD | NEW |
|---|
| (Empty) |
| 1 // Copyright 2015 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 <atlbase.h> | |
| 6 #include <atlcom.h> | |
| 7 #include <oleacc.h> | |
| 8 | |
| 9 #include "base/containers/hash_tables.h" | |
| 10 #include "base/lazy_instance.h" | |
| 11 #include "base/win/scoped_comptr.h" | |
| 12 #include "base/win/scoped_variant.h" | |
| 13 #include "third_party/iaccessible2/ia2_api_all.h" | |
| 14 #include "ui/accessibility/ax_node_data.h" | |
| 15 #include "ui/accessibility/ax_text_utils.h" | |
| 16 #include "ui/accessibility/platform/ax_platform_node_delegate.h" | |
| 17 #include "ui/accessibility/platform/ax_platform_node_win.h" | |
| 18 #include "ui/base/win/atl_module.h" | |
| 19 | |
| 20 // | |
| 21 // Macros to use at the top of any AXPlatformNodeWin function that implements | |
| 22 // a COM interface. Because COM objects are reference counted and clients | |
| 23 // are completely untrusted, it's important to always first check that our | |
| 24 // object is still valid, and then check that all pointer arguments are | |
| 25 // not NULL. | |
| 26 // | |
| 27 | |
| 28 #define COM_OBJECT_VALIDATE() \ | |
| 29 if (!delegate_) \ | |
| 30 return E_FAIL; | |
| 31 #define COM_OBJECT_VALIDATE_1_ARG(arg) \ | |
| 32 if (!delegate_) return E_FAIL; \ | |
| 33 if (!arg) return E_INVALIDARG | |
| 34 #define COM_OBJECT_VALIDATE_2_ARGS(arg1, arg2) \ | |
| 35 if (!delegate_) return E_FAIL; \ | |
| 36 if (!arg1) return E_INVALIDARG; \ | |
| 37 if (!arg2) return E_INVALIDARG | |
| 38 #define COM_OBJECT_VALIDATE_3_ARGS(arg1, arg2, arg3) \ | |
| 39 if (!delegate_) return E_FAIL; \ | |
| 40 if (!arg1) return E_INVALIDARG; \ | |
| 41 if (!arg2) return E_INVALIDARG; \ | |
| 42 if (!arg3) return E_INVALIDARG | |
| 43 #define COM_OBJECT_VALIDATE_4_ARGS(arg1, arg2, arg3, arg4) \ | |
| 44 if (!delegate_) return E_FAIL; \ | |
| 45 if (!arg1) return E_INVALIDARG; \ | |
| 46 if (!arg2) return E_INVALIDARG; \ | |
| 47 if (!arg3) return E_INVALIDARG; \ | |
| 48 if (!arg4) return E_INVALIDARG | |
| 49 #define COM_OBJECT_VALIDATE_VAR_ID(var_id) \ | |
| 50 if (!delegate_) return E_FAIL; \ | |
| 51 if (!IsValidId(var_id)) return E_INVALIDARG | |
| 52 #define COM_OBJECT_VALIDATE_VAR_ID_1_ARG(var_id, arg) \ | |
| 53 if (!delegate_) return E_FAIL; \ | |
| 54 if (!IsValidId(var_id)) return E_INVALIDARG; \ | |
| 55 if (!arg) return E_INVALIDARG | |
| 56 #define COM_OBJECT_VALIDATE_VAR_ID_2_ARGS(var_id, arg1, arg2) \ | |
| 57 if (!delegate_) return E_FAIL; \ | |
| 58 if (!IsValidId(var_id)) return E_INVALIDARG; \ | |
| 59 if (!arg1) return E_INVALIDARG; \ | |
| 60 if (!arg2) return E_INVALIDARG | |
| 61 #define COM_OBJECT_VALIDATE_VAR_ID_3_ARGS(var_id, arg1, arg2, arg3) \ | |
| 62 if (!delegate_) return E_FAIL; \ | |
| 63 if (!IsValidId(var_id)) return E_INVALIDARG; \ | |
| 64 if (!arg1) return E_INVALIDARG; \ | |
| 65 if (!arg2) return E_INVALIDARG; \ | |
| 66 if (!arg3) return E_INVALIDARG | |
| 67 #define COM_OBJECT_VALIDATE_VAR_ID_4_ARGS(var_id, arg1, arg2, arg3, arg4) \ | |
| 68 if (!delegate_) return E_FAIL; \ | |
| 69 if (!IsValidId(var_id)) return E_INVALIDARG; \ | |
| 70 if (!arg1) return E_INVALIDARG; \ | |
| 71 if (!arg2) return E_INVALIDARG; \ | |
| 72 if (!arg3) return E_INVALIDARG; \ | |
| 73 if (!arg4) return E_INVALIDARG | |
| 74 | |
| 75 namespace ui { | |
| 76 | |
| 77 namespace { | |
| 78 | |
| 79 typedef base::hash_map<LONG, AXPlatformNodeWin*> UniqueIdWinMap; | |
| 80 // Map from each AXPlatformNodeWin's unique id to its instance. | |
| 81 base::LazyInstance<UniqueIdWinMap> g_unique_id_win_map = | |
| 82 LAZY_INSTANCE_INITIALIZER; | |
| 83 | |
| 84 typedef base::hash_set<AXPlatformNodeWin*> AXPlatformNodeWinSet; | |
| 85 // Set of all AXPlatformNodeWin objects that were the target of an | |
| 86 // alert event. | |
| 87 base::LazyInstance<AXPlatformNodeWinSet> g_alert_targets = | |
| 88 LAZY_INSTANCE_INITIALIZER; | |
| 89 | |
| 90 LONG GetNextNegativeUniqueIdForWinAccessibility(AXPlatformNodeWin* obj) { | |
| 91 static LONG next_unique_id = -1; | |
| 92 LONG unique_id = next_unique_id; | |
| 93 if (next_unique_id == LONG_MIN) | |
| 94 next_unique_id = -1; | |
| 95 else | |
| 96 next_unique_id--; | |
| 97 | |
| 98 g_unique_id_win_map.Get().insert(std::make_pair(unique_id, obj)); | |
| 99 | |
| 100 return unique_id; | |
| 101 } | |
| 102 | |
| 103 void UnregisterNegativeUniqueId(LONG unique_id) { | |
| 104 g_unique_id_win_map.Get().erase(unique_id); | |
| 105 } | |
| 106 | |
| 107 } // namespace | |
| 108 | |
| 109 // static | |
| 110 AXPlatformNode* AXPlatformNode::Create(AXPlatformNodeDelegate* delegate) { | |
| 111 // Make sure ATL is initialized in this module. | |
| 112 ui::win::CreateATLModuleIfNeeded(); | |
| 113 | |
| 114 CComObject<AXPlatformNodeWin>* instance = nullptr; | |
| 115 HRESULT hr = CComObject<AXPlatformNodeWin>::CreateInstance(&instance); | |
| 116 DCHECK(SUCCEEDED(hr)); | |
| 117 instance->Init(delegate); | |
| 118 instance->AddRef(); | |
| 119 return instance; | |
| 120 } | |
| 121 | |
| 122 // static | |
| 123 AXPlatformNode* AXPlatformNode::FromNativeViewAccessible( | |
| 124 gfx::NativeViewAccessible accessible) { | |
| 125 base::win::ScopedComPtr<AXPlatformNodeWin> ax_platform_node; | |
| 126 accessible->QueryInterface(ax_platform_node.Receive()); | |
| 127 return ax_platform_node.get(); | |
| 128 } | |
| 129 | |
| 130 AXPlatformNodeWin::AXPlatformNodeWin() | |
| 131 : unique_id_win_(GetNextNegativeUniqueIdForWinAccessibility(this)) { | |
| 132 } | |
| 133 | |
| 134 AXPlatformNodeWin::~AXPlatformNodeWin() { | |
| 135 CHECK(!delegate_); | |
| 136 } | |
| 137 | |
| 138 // | |
| 139 // AXPlatformNode implementation. | |
| 140 // | |
| 141 | |
| 142 void AXPlatformNodeWin::Destroy() { | |
| 143 delegate_ = nullptr; | |
| 144 UnregisterNegativeUniqueId(unique_id_win_); | |
| 145 RemoveAlertTarget(); | |
| 146 Release(); | |
| 147 } | |
| 148 | |
| 149 gfx::NativeViewAccessible AXPlatformNodeWin::GetNativeViewAccessible() { | |
| 150 return this; | |
| 151 } | |
| 152 | |
| 153 void AXPlatformNodeWin::NotifyAccessibilityEvent(ui::AXEvent event_type) { | |
| 154 HWND hwnd = delegate_->GetTargetForNativeAccessibilityEvent(); | |
| 155 if (!hwnd) | |
| 156 return; | |
| 157 | |
| 158 int native_event = MSAAEvent(event_type); | |
| 159 if (native_event < EVENT_MIN) | |
| 160 return; | |
| 161 | |
| 162 ::NotifyWinEvent(native_event, hwnd, OBJID_CLIENT, unique_id_win_); | |
| 163 | |
| 164 // Keep track of objects that are a target of an alert event. | |
| 165 if (event_type == ui::AX_EVENT_ALERT) | |
| 166 AddAlertTarget(); | |
| 167 } | |
| 168 | |
| 169 int AXPlatformNodeWin::GetIndexInParent() { | |
| 170 base::win::ScopedComPtr<IDispatch> parent_dispatch; | |
| 171 base::win::ScopedComPtr<IAccessible> parent_accessible; | |
| 172 if (S_OK != get_accParent(parent_dispatch.Receive())) | |
| 173 return -1; | |
| 174 if (S_OK != parent_dispatch.QueryInterface(parent_accessible.Receive())) | |
| 175 return -1; | |
| 176 | |
| 177 LONG child_count = 0; | |
| 178 if (S_OK != parent_accessible->get_accChildCount(&child_count)) | |
| 179 return -1; | |
| 180 for (LONG index = 1; index <= child_count; ++index) { | |
| 181 base::win::ScopedVariant childid_index(index); | |
| 182 base::win::ScopedComPtr<IDispatch> child_dispatch; | |
| 183 base::win::ScopedComPtr<IAccessible> child_accessible; | |
| 184 if (S_OK == parent_accessible->get_accChild(childid_index, | |
| 185 child_dispatch.Receive()) && | |
| 186 S_OK == child_dispatch.QueryInterface(child_accessible.Receive())) { | |
| 187 if (child_accessible.get() == this) | |
| 188 return index - 1; | |
| 189 } | |
| 190 } | |
| 191 | |
| 192 return -1; | |
| 193 } | |
| 194 | |
| 195 // | |
| 196 // IAccessible implementation. | |
| 197 // | |
| 198 | |
| 199 STDMETHODIMP AXPlatformNodeWin::accHitTest( | |
| 200 LONG x_left, LONG y_top, VARIANT* child) { | |
| 201 COM_OBJECT_VALIDATE_1_ARG(child); | |
| 202 gfx::NativeViewAccessible hit_child = delegate_->HitTestSync(x_left, y_top); | |
| 203 if (!hit_child) { | |
| 204 child->vt = VT_EMPTY; | |
| 205 return S_FALSE; | |
| 206 } | |
| 207 | |
| 208 if (hit_child == this) { | |
| 209 // This object is the best match, so return CHILDID_SELF. It's tempting to | |
| 210 // simplify the logic and use VT_DISPATCH everywhere, but the Windows | |
| 211 // call AccessibleObjectFromPoint will keep calling accHitTest until some | |
| 212 // object returns CHILDID_SELF. | |
| 213 child->vt = VT_I4; | |
| 214 child->lVal = CHILDID_SELF; | |
| 215 return S_OK; | |
| 216 } | |
| 217 | |
| 218 // Call accHitTest recursively on the result, which may be a recursive call | |
| 219 // to this function or it may be overridden, for example in the case of a | |
| 220 // WebView. | |
| 221 HRESULT result = hit_child->accHitTest(x_left, y_top, child); | |
| 222 | |
| 223 // If the recursive call returned CHILDID_SELF, we have to convert that | |
| 224 // into a VT_DISPATCH for the return value to this call. | |
| 225 if (S_OK == result && child->vt == VT_I4 && child->lVal == CHILDID_SELF) { | |
| 226 child->vt = VT_DISPATCH; | |
| 227 child->pdispVal = hit_child; | |
| 228 // Always increment ref when returning a reference to a COM object. | |
| 229 child->pdispVal->AddRef(); | |
| 230 } | |
| 231 return result; | |
| 232 } | |
| 233 | |
| 234 HRESULT AXPlatformNodeWin::accDoDefaultAction(VARIANT var_id) { | |
| 235 COM_OBJECT_VALIDATE_VAR_ID(var_id); | |
| 236 delegate_->DoDefaultAction(); | |
| 237 return S_OK; | |
| 238 } | |
| 239 | |
| 240 STDMETHODIMP AXPlatformNodeWin::accLocation( | |
| 241 LONG* x_left, LONG* y_top, LONG* width, LONG* height, VARIANT var_id) { | |
| 242 COM_OBJECT_VALIDATE_VAR_ID_4_ARGS(var_id, x_left, y_top, width, height); | |
| 243 gfx::Rect bounds = GetData().location; | |
| 244 bounds += delegate_->GetGlobalCoordinateOffset(); | |
| 245 *x_left = bounds.x(); | |
| 246 *y_top = bounds.y(); | |
| 247 *width = bounds.width(); | |
| 248 *height = bounds.height(); | |
| 249 | |
| 250 if (bounds.IsEmpty()) | |
| 251 return S_FALSE; | |
| 252 | |
| 253 return S_OK; | |
| 254 } | |
| 255 | |
| 256 STDMETHODIMP AXPlatformNodeWin::accNavigate( | |
| 257 LONG nav_dir, VARIANT start, VARIANT* end) { | |
| 258 COM_OBJECT_VALIDATE_VAR_ID_1_ARG(start, end); | |
| 259 IAccessible* result = nullptr; | |
| 260 | |
| 261 switch (nav_dir) { | |
| 262 case NAVDIR_DOWN: | |
| 263 case NAVDIR_UP: | |
| 264 case NAVDIR_LEFT: | |
| 265 case NAVDIR_RIGHT: | |
| 266 // These directions are not implemented, matching Mozilla and IE. | |
| 267 return E_NOTIMPL; | |
| 268 | |
| 269 case NAVDIR_FIRSTCHILD: | |
| 270 if (delegate_->GetChildCount() > 0) | |
| 271 result = delegate_->ChildAtIndex(0); | |
| 272 break; | |
| 273 | |
| 274 case NAVDIR_LASTCHILD: | |
| 275 if (delegate_->GetChildCount() > 0) | |
| 276 result = delegate_->ChildAtIndex(delegate_->GetChildCount() - 1); | |
| 277 break; | |
| 278 | |
| 279 case NAVDIR_NEXT: { | |
| 280 AXPlatformNodeBase* next = GetNextSibling(); | |
| 281 if (next) | |
| 282 result = next->GetNativeViewAccessible(); | |
| 283 break; | |
| 284 } | |
| 285 | |
| 286 case NAVDIR_PREVIOUS: { | |
| 287 AXPlatformNodeBase* previous = GetPreviousSibling(); | |
| 288 if (previous) | |
| 289 result = previous->GetNativeViewAccessible(); | |
| 290 break; | |
| 291 } | |
| 292 | |
| 293 default: | |
| 294 return E_INVALIDARG; | |
| 295 } | |
| 296 | |
| 297 if (!result) { | |
| 298 end->vt = VT_EMPTY; | |
| 299 return S_FALSE; | |
| 300 } | |
| 301 | |
| 302 end->vt = VT_DISPATCH; | |
| 303 end->pdispVal = result; | |
| 304 // Always increment ref when returning a reference to a COM object. | |
| 305 end->pdispVal->AddRef(); | |
| 306 | |
| 307 return S_OK; | |
| 308 } | |
| 309 | |
| 310 STDMETHODIMP AXPlatformNodeWin::get_accChild(VARIANT var_child, | |
| 311 IDispatch** disp_child) { | |
| 312 COM_OBJECT_VALIDATE_1_ARG(disp_child); | |
| 313 LONG child_id = V_I4(&var_child); | |
| 314 if (child_id == CHILDID_SELF) { | |
| 315 *disp_child = this; | |
| 316 (*disp_child)->AddRef(); | |
| 317 return S_OK; | |
| 318 } | |
| 319 | |
| 320 if (child_id >= 1 && child_id <= delegate_->GetChildCount()) { | |
| 321 // Positive child ids are a 1-based child index, used by clients | |
| 322 // that want to enumerate all immediate children. | |
| 323 *disp_child = delegate_->ChildAtIndex(child_id - 1); | |
| 324 (*disp_child)->AddRef(); | |
| 325 return S_OK; | |
| 326 } | |
| 327 | |
| 328 if (child_id >= 0) | |
| 329 return E_FAIL; | |
| 330 | |
| 331 // Negative child ids can be used to map to any descendant. | |
| 332 UniqueIdWinMap* unique_ids = g_unique_id_win_map.Pointer(); | |
| 333 auto iter = unique_ids->find(child_id); | |
| 334 if (iter != unique_ids->end()) { | |
| 335 *disp_child = iter->second; | |
| 336 (*disp_child)->AddRef(); | |
| 337 return S_OK; | |
| 338 } | |
| 339 | |
| 340 *disp_child = nullptr; | |
| 341 return E_FAIL; | |
| 342 } | |
| 343 | |
| 344 STDMETHODIMP AXPlatformNodeWin::get_accChildCount(LONG* child_count) { | |
| 345 COM_OBJECT_VALIDATE_1_ARG(child_count); | |
| 346 *child_count = delegate_->GetChildCount(); | |
| 347 return S_OK; | |
| 348 } | |
| 349 | |
| 350 STDMETHODIMP AXPlatformNodeWin::get_accDefaultAction( | |
| 351 VARIANT var_id, BSTR* def_action) { | |
| 352 COM_OBJECT_VALIDATE_VAR_ID_1_ARG(var_id, def_action); | |
| 353 return GetStringAttributeAsBstr(ui::AX_ATTR_ACTION, def_action); | |
| 354 } | |
| 355 | |
| 356 STDMETHODIMP AXPlatformNodeWin::get_accDescription( | |
| 357 VARIANT var_id, BSTR* desc) { | |
| 358 COM_OBJECT_VALIDATE_VAR_ID_1_ARG(var_id, desc); | |
| 359 return GetStringAttributeAsBstr(ui::AX_ATTR_DESCRIPTION, desc); | |
| 360 } | |
| 361 | |
| 362 STDMETHODIMP AXPlatformNodeWin::get_accFocus(VARIANT* focus_child) { | |
| 363 COM_OBJECT_VALIDATE_1_ARG(focus_child); | |
| 364 gfx::NativeViewAccessible focus_accessible = delegate_->GetFocus(); | |
| 365 if (focus_accessible == this) { | |
| 366 focus_child->vt = VT_I4; | |
| 367 focus_child->lVal = CHILDID_SELF; | |
| 368 } else if (focus_accessible) { | |
| 369 focus_child->vt = VT_DISPATCH; | |
| 370 focus_child->pdispVal = focus_accessible; | |
| 371 focus_child->pdispVal->AddRef(); | |
| 372 return S_OK; | |
| 373 } else { | |
| 374 focus_child->vt = VT_EMPTY; | |
| 375 } | |
| 376 | |
| 377 return S_OK; | |
| 378 } | |
| 379 | |
| 380 STDMETHODIMP AXPlatformNodeWin::get_accKeyboardShortcut( | |
| 381 VARIANT var_id, BSTR* acc_key) { | |
| 382 COM_OBJECT_VALIDATE_VAR_ID_1_ARG(var_id, acc_key); | |
| 383 return GetStringAttributeAsBstr(ui::AX_ATTR_SHORTCUT, acc_key); | |
| 384 } | |
| 385 | |
| 386 STDMETHODIMP AXPlatformNodeWin::get_accName( | |
| 387 VARIANT var_id, BSTR* name) { | |
| 388 COM_OBJECT_VALIDATE_VAR_ID_1_ARG(var_id, name); | |
| 389 return GetStringAttributeAsBstr(ui::AX_ATTR_NAME, name); | |
| 390 } | |
| 391 | |
| 392 STDMETHODIMP AXPlatformNodeWin::get_accParent( | |
| 393 IDispatch** disp_parent) { | |
| 394 COM_OBJECT_VALIDATE_1_ARG(disp_parent); | |
| 395 *disp_parent = GetParent(); | |
| 396 if (*disp_parent) { | |
| 397 (*disp_parent)->AddRef(); | |
| 398 return S_OK; | |
| 399 } | |
| 400 | |
| 401 return S_FALSE; | |
| 402 } | |
| 403 | |
| 404 STDMETHODIMP AXPlatformNodeWin::get_accRole( | |
| 405 VARIANT var_id, VARIANT* role) { | |
| 406 COM_OBJECT_VALIDATE_VAR_ID_1_ARG(var_id, role); | |
| 407 role->vt = VT_I4; | |
| 408 role->lVal = MSAARole(); | |
| 409 return S_OK; | |
| 410 } | |
| 411 | |
| 412 STDMETHODIMP AXPlatformNodeWin::get_accState( | |
| 413 VARIANT var_id, VARIANT* state) { | |
| 414 COM_OBJECT_VALIDATE_VAR_ID_1_ARG(var_id, state); | |
| 415 state->vt = VT_I4; | |
| 416 state->lVal = MSAAState(); | |
| 417 return S_OK; | |
| 418 } | |
| 419 | |
| 420 STDMETHODIMP AXPlatformNodeWin::get_accHelp( | |
| 421 VARIANT var_id, BSTR* help) { | |
| 422 COM_OBJECT_VALIDATE_VAR_ID_1_ARG(var_id, help); | |
| 423 return GetStringAttributeAsBstr(ui::AX_ATTR_HELP, help); | |
| 424 } | |
| 425 | |
| 426 STDMETHODIMP AXPlatformNodeWin::get_accValue(VARIANT var_id, BSTR* value) { | |
| 427 COM_OBJECT_VALIDATE_VAR_ID_1_ARG(var_id, value); | |
| 428 return GetStringAttributeAsBstr(ui::AX_ATTR_VALUE, value); | |
| 429 } | |
| 430 | |
| 431 STDMETHODIMP AXPlatformNodeWin::put_accValue(VARIANT var_id, | |
| 432 BSTR new_value) { | |
| 433 COM_OBJECT_VALIDATE_VAR_ID(var_id); | |
| 434 if (delegate_->SetStringValue(new_value)) | |
| 435 return S_OK; | |
| 436 return E_FAIL; | |
| 437 } | |
| 438 | |
| 439 // IAccessible functions not supported. | |
| 440 | |
| 441 STDMETHODIMP AXPlatformNodeWin::get_accSelection(VARIANT* selected) { | |
| 442 COM_OBJECT_VALIDATE_1_ARG(selected); | |
| 443 if (selected) | |
| 444 selected->vt = VT_EMPTY; | |
| 445 return E_NOTIMPL; | |
| 446 } | |
| 447 | |
| 448 STDMETHODIMP AXPlatformNodeWin::accSelect( | |
| 449 LONG flagsSelect, VARIANT var_id) { | |
| 450 COM_OBJECT_VALIDATE_VAR_ID(var_id); | |
| 451 return E_NOTIMPL; | |
| 452 } | |
| 453 | |
| 454 STDMETHODIMP AXPlatformNodeWin::get_accHelpTopic( | |
| 455 BSTR* help_file, VARIANT var_id, LONG* topic_id) { | |
| 456 COM_OBJECT_VALIDATE_VAR_ID_2_ARGS(var_id, help_file, topic_id); | |
| 457 if (help_file) { | |
| 458 *help_file = nullptr; | |
| 459 } | |
| 460 if (topic_id) { | |
| 461 *topic_id = static_cast<LONG>(-1); | |
| 462 } | |
| 463 return E_NOTIMPL; | |
| 464 } | |
| 465 | |
| 466 STDMETHODIMP AXPlatformNodeWin::put_accName( | |
| 467 VARIANT var_id, BSTR put_name) { | |
| 468 COM_OBJECT_VALIDATE_VAR_ID(var_id); | |
| 469 // Deprecated. | |
| 470 return E_NOTIMPL; | |
| 471 } | |
| 472 | |
| 473 // | |
| 474 // IAccessible2 implementation. | |
| 475 // | |
| 476 | |
| 477 STDMETHODIMP AXPlatformNodeWin::role(LONG* role) { | |
| 478 COM_OBJECT_VALIDATE_1_ARG(role); | |
| 479 *role = MSAARole(); | |
| 480 return S_OK; | |
| 481 } | |
| 482 | |
| 483 STDMETHODIMP AXPlatformNodeWin::get_states(AccessibleStates* states) { | |
| 484 COM_OBJECT_VALIDATE_1_ARG(states); | |
| 485 // There are only a couple of states we need to support | |
| 486 // in IAccessible2. If any more are added, we may want to | |
| 487 // add a helper function like MSAAState. | |
| 488 *states = IA2_STATE_OPAQUE; | |
| 489 if (GetData().state & (1 << ui::AX_STATE_EDITABLE)) | |
| 490 *states |= IA2_STATE_EDITABLE; | |
| 491 | |
| 492 return S_OK; | |
| 493 } | |
| 494 | |
| 495 STDMETHODIMP AXPlatformNodeWin::get_uniqueID(LONG* unique_id) { | |
| 496 COM_OBJECT_VALIDATE_1_ARG(unique_id); | |
| 497 *unique_id = unique_id_win_; | |
| 498 return S_OK; | |
| 499 } | |
| 500 | |
| 501 STDMETHODIMP AXPlatformNodeWin::get_windowHandle(HWND* window_handle) { | |
| 502 COM_OBJECT_VALIDATE_1_ARG(window_handle); | |
| 503 *window_handle = delegate_->GetTargetForNativeAccessibilityEvent(); | |
| 504 return *window_handle ? S_OK : S_FALSE; | |
| 505 } | |
| 506 | |
| 507 STDMETHODIMP AXPlatformNodeWin::get_relationTargetsOfType( | |
| 508 BSTR type_bstr, | |
| 509 long max_targets, | |
| 510 IUnknown ***targets, | |
| 511 long *n_targets) { | |
| 512 COM_OBJECT_VALIDATE_2_ARGS(targets, n_targets); | |
| 513 | |
| 514 *n_targets = 0; | |
| 515 *targets = nullptr; | |
| 516 | |
| 517 // Only respond to requests for relations of type "alerts". | |
| 518 base::string16 type(type_bstr); | |
| 519 if (type != L"alerts") | |
| 520 return S_FALSE; | |
| 521 | |
| 522 // Collect all of the objects that have had an alert fired on them that | |
| 523 // are a descendant of this object. | |
| 524 std::vector<AXPlatformNodeWin*> alert_targets; | |
| 525 for (auto iter = g_alert_targets.Get().begin(); | |
| 526 iter != g_alert_targets.Get().end(); | |
| 527 ++iter) { | |
| 528 AXPlatformNodeWin* target = *iter; | |
| 529 if (IsDescendant(target)) | |
| 530 alert_targets.push_back(target); | |
| 531 } | |
| 532 | |
| 533 long count = static_cast<long>(alert_targets.size()); | |
| 534 if (count == 0) | |
| 535 return S_FALSE; | |
| 536 | |
| 537 // Don't return more targets than max_targets - but note that the caller | |
| 538 // is allowed to specify max_targets=0 to mean no limit. | |
| 539 if (max_targets > 0 && count > max_targets) | |
| 540 count = max_targets; | |
| 541 | |
| 542 // Return the number of targets. | |
| 543 *n_targets = count; | |
| 544 | |
| 545 // Allocate COM memory for the result array and populate it. | |
| 546 *targets = static_cast<IUnknown**>( | |
| 547 CoTaskMemAlloc(count * sizeof(IUnknown*))); | |
| 548 for (long i = 0; i < count; ++i) { | |
| 549 (*targets)[i] = static_cast<IAccessible*>(alert_targets[i]); | |
| 550 (*targets)[i]->AddRef(); | |
| 551 } | |
| 552 return S_OK; | |
| 553 } | |
| 554 | |
| 555 STDMETHODIMP AXPlatformNodeWin::get_attributes(BSTR* attributes) { | |
| 556 COM_OBJECT_VALIDATE_1_ARG(attributes); | |
| 557 base::string16 attributes_str; | |
| 558 | |
| 559 // Text fields need to report the attribute "text-model:a1" to instruct | |
| 560 // screen readers to use IAccessible2 APIs to handle text editing in this | |
| 561 // object (as opposed to treating it like a native Windows text box). | |
| 562 // The text-model:a1 attribute is documented here: | |
| 563 // http://www.linuxfoundation.org/collaborate/workgroups/accessibility/ia2/ia2
_implementation_guide | |
| 564 if (GetData().role == ui::AX_ROLE_TEXT_FIELD) { | |
| 565 attributes_str = L"text-model:a1;"; | |
| 566 } | |
| 567 | |
| 568 *attributes = SysAllocString(attributes_str.c_str()); | |
| 569 DCHECK(*attributes); | |
| 570 return S_OK; | |
| 571 } | |
| 572 | |
| 573 // | |
| 574 // IAccessibleText | |
| 575 // | |
| 576 | |
| 577 STDMETHODIMP AXPlatformNodeWin::get_nCharacters(LONG* n_characters) { | |
| 578 COM_OBJECT_VALIDATE_1_ARG(n_characters); | |
| 579 base::string16 text = TextForIAccessibleText(); | |
| 580 *n_characters = static_cast<LONG>(text.size()); | |
| 581 | |
| 582 return S_OK; | |
| 583 } | |
| 584 | |
| 585 STDMETHODIMP AXPlatformNodeWin::get_caretOffset(LONG* offset) { | |
| 586 COM_OBJECT_VALIDATE_1_ARG(offset); | |
| 587 *offset = static_cast<LONG>(GetIntAttribute(ui::AX_ATTR_TEXT_SEL_END)); | |
| 588 return S_OK; | |
| 589 } | |
| 590 | |
| 591 STDMETHODIMP AXPlatformNodeWin::get_nSelections(LONG* n_selections) { | |
| 592 COM_OBJECT_VALIDATE_1_ARG(n_selections); | |
| 593 int sel_start = GetIntAttribute(ui::AX_ATTR_TEXT_SEL_START); | |
| 594 int sel_end = GetIntAttribute(ui::AX_ATTR_TEXT_SEL_END); | |
| 595 if (sel_start != sel_end) | |
| 596 *n_selections = 1; | |
| 597 else | |
| 598 *n_selections = 0; | |
| 599 return S_OK; | |
| 600 } | |
| 601 | |
| 602 STDMETHODIMP AXPlatformNodeWin::get_selection(LONG selection_index, | |
| 603 LONG* start_offset, | |
| 604 LONG* end_offset) { | |
| 605 COM_OBJECT_VALIDATE_2_ARGS(start_offset, end_offset); | |
| 606 if (selection_index != 0) | |
| 607 return E_INVALIDARG; | |
| 608 | |
| 609 *start_offset = static_cast<LONG>( | |
| 610 GetIntAttribute(ui::AX_ATTR_TEXT_SEL_START)); | |
| 611 *end_offset = static_cast<LONG>( | |
| 612 GetIntAttribute(ui::AX_ATTR_TEXT_SEL_END)); | |
| 613 return S_OK; | |
| 614 } | |
| 615 | |
| 616 STDMETHODIMP AXPlatformNodeWin::get_text(LONG start_offset, | |
| 617 LONG end_offset, | |
| 618 BSTR* text) { | |
| 619 COM_OBJECT_VALIDATE_1_ARG(text); | |
| 620 int sel_end = GetIntAttribute(ui::AX_ATTR_TEXT_SEL_START); | |
| 621 base::string16 text_str = TextForIAccessibleText(); | |
| 622 LONG len = static_cast<LONG>(text_str.size()); | |
| 623 | |
| 624 if (start_offset == IA2_TEXT_OFFSET_LENGTH) { | |
| 625 start_offset = len; | |
| 626 } else if (start_offset == IA2_TEXT_OFFSET_CARET) { | |
| 627 start_offset = static_cast<LONG>(sel_end); | |
| 628 } | |
| 629 if (end_offset == IA2_TEXT_OFFSET_LENGTH) { | |
| 630 end_offset = static_cast<LONG>(text_str.size()); | |
| 631 } else if (end_offset == IA2_TEXT_OFFSET_CARET) { | |
| 632 end_offset = static_cast<LONG>(sel_end); | |
| 633 } | |
| 634 | |
| 635 // The spec allows the arguments to be reversed. | |
| 636 if (start_offset > end_offset) { | |
| 637 LONG tmp = start_offset; | |
| 638 start_offset = end_offset; | |
| 639 end_offset = tmp; | |
| 640 } | |
| 641 | |
| 642 // The spec does not allow the start or end offsets to be out or range; | |
| 643 // we must return an error if so. | |
| 644 if (start_offset < 0) | |
| 645 return E_INVALIDARG; | |
| 646 if (end_offset > len) | |
| 647 return E_INVALIDARG; | |
| 648 | |
| 649 base::string16 substr = | |
| 650 text_str.substr(start_offset, end_offset - start_offset); | |
| 651 if (substr.empty()) | |
| 652 return S_FALSE; | |
| 653 | |
| 654 *text = SysAllocString(substr.c_str()); | |
| 655 DCHECK(*text); | |
| 656 return S_OK; | |
| 657 } | |
| 658 | |
| 659 STDMETHODIMP AXPlatformNodeWin::get_textAtOffset( | |
| 660 LONG offset, | |
| 661 enum IA2TextBoundaryType boundary_type, | |
| 662 LONG* start_offset, LONG* end_offset, | |
| 663 BSTR* text) { | |
| 664 COM_OBJECT_VALIDATE_3_ARGS(start_offset, end_offset, text); | |
| 665 // The IAccessible2 spec says we don't have to implement the "sentence" | |
| 666 // boundary type, we can just let the screen reader handle it. | |
| 667 if (boundary_type == IA2_TEXT_BOUNDARY_SENTENCE) { | |
| 668 *start_offset = 0; | |
| 669 *end_offset = 0; | |
| 670 *text = nullptr; | |
| 671 return S_FALSE; | |
| 672 } | |
| 673 | |
| 674 const base::string16& text_str = TextForIAccessibleText(); | |
| 675 | |
| 676 *start_offset = FindBoundary( | |
| 677 text_str, boundary_type, offset, ui::BACKWARDS_DIRECTION); | |
| 678 *end_offset = FindBoundary( | |
| 679 text_str, boundary_type, offset, ui::FORWARDS_DIRECTION); | |
| 680 return get_text(*start_offset, *end_offset, text); | |
| 681 } | |
| 682 | |
| 683 STDMETHODIMP AXPlatformNodeWin::get_textBeforeOffset( | |
| 684 LONG offset, | |
| 685 enum IA2TextBoundaryType boundary_type, | |
| 686 LONG* start_offset, LONG* end_offset, | |
| 687 BSTR* text) { | |
| 688 if (!start_offset || !end_offset || !text) | |
| 689 return E_INVALIDARG; | |
| 690 | |
| 691 // The IAccessible2 spec says we don't have to implement the "sentence" | |
| 692 // boundary type, we can just let the screenreader handle it. | |
| 693 if (boundary_type == IA2_TEXT_BOUNDARY_SENTENCE) { | |
| 694 *start_offset = 0; | |
| 695 *end_offset = 0; | |
| 696 *text = nullptr; | |
| 697 return S_FALSE; | |
| 698 } | |
| 699 | |
| 700 const base::string16& text_str = TextForIAccessibleText(); | |
| 701 | |
| 702 *start_offset = FindBoundary( | |
| 703 text_str, boundary_type, offset, ui::BACKWARDS_DIRECTION); | |
| 704 *end_offset = offset; | |
| 705 return get_text(*start_offset, *end_offset, text); | |
| 706 } | |
| 707 | |
| 708 STDMETHODIMP AXPlatformNodeWin::get_textAfterOffset( | |
| 709 LONG offset, | |
| 710 enum IA2TextBoundaryType boundary_type, | |
| 711 LONG* start_offset, LONG* end_offset, | |
| 712 BSTR* text) { | |
| 713 if (!start_offset || !end_offset || !text) | |
| 714 return E_INVALIDARG; | |
| 715 | |
| 716 // The IAccessible2 spec says we don't have to implement the "sentence" | |
| 717 // boundary type, we can just let the screenreader handle it. | |
| 718 if (boundary_type == IA2_TEXT_BOUNDARY_SENTENCE) { | |
| 719 *start_offset = 0; | |
| 720 *end_offset = 0; | |
| 721 *text = nullptr; | |
| 722 return S_FALSE; | |
| 723 } | |
| 724 | |
| 725 const base::string16& text_str = TextForIAccessibleText(); | |
| 726 | |
| 727 *start_offset = offset; | |
| 728 *end_offset = FindBoundary( | |
| 729 text_str, boundary_type, offset, ui::FORWARDS_DIRECTION); | |
| 730 return get_text(*start_offset, *end_offset, text); | |
| 731 } | |
| 732 | |
| 733 STDMETHODIMP AXPlatformNodeWin::get_offsetAtPoint( | |
| 734 LONG x, LONG y, enum IA2CoordinateType coord_type, LONG* offset) { | |
| 735 COM_OBJECT_VALIDATE_1_ARG(offset); | |
| 736 // We don't support this method, but we have to return something | |
| 737 // rather than E_NOTIMPL or screen readers will complain. | |
| 738 *offset = 0; | |
| 739 return S_OK; | |
| 740 } | |
| 741 | |
| 742 // | |
| 743 // IServiceProvider implementation. | |
| 744 // | |
| 745 | |
| 746 STDMETHODIMP AXPlatformNodeWin::QueryService( | |
| 747 REFGUID guidService, REFIID riid, void** object) { | |
| 748 COM_OBJECT_VALIDATE_1_ARG(object); | |
| 749 if (guidService == IID_IAccessible || | |
| 750 guidService == IID_IAccessible2 || | |
| 751 guidService == IID_IAccessible2_2 || | |
| 752 guidService == IID_IAccessibleText) { | |
| 753 return QueryInterface(riid, object); | |
| 754 } | |
| 755 | |
| 756 *object = nullptr; | |
| 757 return E_FAIL; | |
| 758 } | |
| 759 | |
| 760 // | |
| 761 // Private member functions. | |
| 762 // | |
| 763 | |
| 764 bool AXPlatformNodeWin::IsValidId(const VARIANT& child) const { | |
| 765 // Since we have a separate IAccessible COM object for each node, we only | |
| 766 // support the CHILDID_SELF id. | |
| 767 return (VT_I4 == child.vt) && (CHILDID_SELF == child.lVal); | |
| 768 } | |
| 769 | |
| 770 int AXPlatformNodeWin::MSAARole() { | |
| 771 switch (GetData().role) { | |
| 772 case ui::AX_ROLE_ALERT: | |
| 773 return ROLE_SYSTEM_ALERT; | |
| 774 case ui::AX_ROLE_APPLICATION: | |
| 775 return ROLE_SYSTEM_APPLICATION; | |
| 776 case ui::AX_ROLE_BUTTON_DROP_DOWN: | |
| 777 return ROLE_SYSTEM_BUTTONDROPDOWN; | |
| 778 case ui::AX_ROLE_POP_UP_BUTTON: | |
| 779 return ROLE_SYSTEM_BUTTONMENU; | |
| 780 case ui::AX_ROLE_CHECK_BOX: | |
| 781 return ROLE_SYSTEM_CHECKBUTTON; | |
| 782 case ui::AX_ROLE_COMBO_BOX: | |
| 783 return ROLE_SYSTEM_COMBOBOX; | |
| 784 case ui::AX_ROLE_DIALOG: | |
| 785 return ROLE_SYSTEM_DIALOG; | |
| 786 case ui::AX_ROLE_GROUP: | |
| 787 return ROLE_SYSTEM_GROUPING; | |
| 788 case ui::AX_ROLE_IMAGE: | |
| 789 return ROLE_SYSTEM_GRAPHIC; | |
| 790 case ui::AX_ROLE_LINK: | |
| 791 return ROLE_SYSTEM_LINK; | |
| 792 case ui::AX_ROLE_LOCATION_BAR: | |
| 793 return ROLE_SYSTEM_GROUPING; | |
| 794 case ui::AX_ROLE_MENU_BAR: | |
| 795 return ROLE_SYSTEM_MENUBAR; | |
| 796 case ui::AX_ROLE_MENU_ITEM: | |
| 797 return ROLE_SYSTEM_MENUITEM; | |
| 798 case ui::AX_ROLE_MENU_LIST_POPUP: | |
| 799 return ROLE_SYSTEM_MENUPOPUP; | |
| 800 case ui::AX_ROLE_TREE: | |
| 801 return ROLE_SYSTEM_OUTLINE; | |
| 802 case ui::AX_ROLE_TREE_ITEM: | |
| 803 return ROLE_SYSTEM_OUTLINEITEM; | |
| 804 case ui::AX_ROLE_TAB: | |
| 805 return ROLE_SYSTEM_PAGETAB; | |
| 806 case ui::AX_ROLE_TAB_LIST: | |
| 807 return ROLE_SYSTEM_PAGETABLIST; | |
| 808 case ui::AX_ROLE_PANE: | |
| 809 return ROLE_SYSTEM_PANE; | |
| 810 case ui::AX_ROLE_PROGRESS_INDICATOR: | |
| 811 return ROLE_SYSTEM_PROGRESSBAR; | |
| 812 case ui::AX_ROLE_BUTTON: | |
| 813 return ROLE_SYSTEM_PUSHBUTTON; | |
| 814 case ui::AX_ROLE_RADIO_BUTTON: | |
| 815 return ROLE_SYSTEM_RADIOBUTTON; | |
| 816 case ui::AX_ROLE_SCROLL_BAR: | |
| 817 return ROLE_SYSTEM_SCROLLBAR; | |
| 818 case ui::AX_ROLE_SPLITTER: | |
| 819 return ROLE_SYSTEM_SEPARATOR; | |
| 820 case ui::AX_ROLE_SLIDER: | |
| 821 return ROLE_SYSTEM_SLIDER; | |
| 822 case ui::AX_ROLE_STATIC_TEXT: | |
| 823 return ROLE_SYSTEM_STATICTEXT; | |
| 824 case ui::AX_ROLE_TEXT_FIELD: | |
| 825 return ROLE_SYSTEM_TEXT; | |
| 826 case ui::AX_ROLE_TITLE_BAR: | |
| 827 return ROLE_SYSTEM_TITLEBAR; | |
| 828 case ui::AX_ROLE_TOOLBAR: | |
| 829 return ROLE_SYSTEM_TOOLBAR; | |
| 830 case ui::AX_ROLE_WEB_VIEW: | |
| 831 return ROLE_SYSTEM_GROUPING; | |
| 832 case ui::AX_ROLE_WINDOW: | |
| 833 return ROLE_SYSTEM_WINDOW; | |
| 834 case ui::AX_ROLE_CLIENT: | |
| 835 default: | |
| 836 // This is the default role for MSAA. | |
| 837 return ROLE_SYSTEM_CLIENT; | |
| 838 } | |
| 839 } | |
| 840 | |
| 841 int AXPlatformNodeWin::MSAAState() { | |
| 842 uint32 state = GetData().state; | |
| 843 | |
| 844 int msaa_state = 0; | |
| 845 if (state & (1 << ui::AX_STATE_CHECKED)) | |
| 846 msaa_state |= STATE_SYSTEM_CHECKED; | |
| 847 if (state & (1 << ui::AX_STATE_COLLAPSED)) | |
| 848 msaa_state |= STATE_SYSTEM_COLLAPSED; | |
| 849 if (state & (1 << ui::AX_STATE_DEFAULT)) | |
| 850 msaa_state |= STATE_SYSTEM_DEFAULT; | |
| 851 if (state & (1 << ui::AX_STATE_EXPANDED)) | |
| 852 msaa_state |= STATE_SYSTEM_EXPANDED; | |
| 853 if (state & (1 << ui::AX_STATE_FOCUSABLE)) | |
| 854 msaa_state |= STATE_SYSTEM_FOCUSABLE; | |
| 855 if (state & (1 << ui::AX_STATE_FOCUSED)) | |
| 856 msaa_state |= STATE_SYSTEM_FOCUSED; | |
| 857 if (state & (1 << ui::AX_STATE_HASPOPUP)) | |
| 858 msaa_state |= STATE_SYSTEM_HASPOPUP; | |
| 859 if (state & (1 << ui::AX_STATE_HOVERED)) | |
| 860 msaa_state |= STATE_SYSTEM_HOTTRACKED; | |
| 861 if (state & (1 << ui::AX_STATE_INVISIBLE)) | |
| 862 msaa_state |= STATE_SYSTEM_INVISIBLE; | |
| 863 if (state & (1 << ui::AX_STATE_LINKED)) | |
| 864 msaa_state |= STATE_SYSTEM_LINKED; | |
| 865 if (state & (1 << ui::AX_STATE_OFFSCREEN)) | |
| 866 msaa_state |= STATE_SYSTEM_OFFSCREEN; | |
| 867 if (state & (1 << ui::AX_STATE_PRESSED)) | |
| 868 msaa_state |= STATE_SYSTEM_PRESSED; | |
| 869 if (state & (1 << ui::AX_STATE_PROTECTED)) | |
| 870 msaa_state |= STATE_SYSTEM_PROTECTED; | |
| 871 if (state & (1 << ui::AX_STATE_READ_ONLY)) | |
| 872 msaa_state |= STATE_SYSTEM_READONLY; | |
| 873 if (state & (1 << ui::AX_STATE_SELECTABLE)) | |
| 874 msaa_state |= STATE_SYSTEM_SELECTABLE; | |
| 875 if (state & (1 << ui::AX_STATE_SELECTED)) | |
| 876 msaa_state |= STATE_SYSTEM_SELECTED; | |
| 877 if (state & (1 << ui::AX_STATE_DISABLED)) | |
| 878 msaa_state |= STATE_SYSTEM_UNAVAILABLE; | |
| 879 | |
| 880 return msaa_state; | |
| 881 } | |
| 882 | |
| 883 int AXPlatformNodeWin::MSAAEvent(ui::AXEvent event) { | |
| 884 switch (event) { | |
| 885 case ui::AX_EVENT_ALERT: | |
| 886 return EVENT_SYSTEM_ALERT; | |
| 887 case ui::AX_EVENT_FOCUS: | |
| 888 return EVENT_OBJECT_FOCUS; | |
| 889 case ui::AX_EVENT_MENU_START: | |
| 890 return EVENT_SYSTEM_MENUSTART; | |
| 891 case ui::AX_EVENT_MENU_END: | |
| 892 return EVENT_SYSTEM_MENUEND; | |
| 893 case ui::AX_EVENT_MENU_POPUP_START: | |
| 894 return EVENT_SYSTEM_MENUPOPUPSTART; | |
| 895 case ui::AX_EVENT_MENU_POPUP_END: | |
| 896 return EVENT_SYSTEM_MENUPOPUPEND; | |
| 897 case ui::AX_EVENT_SELECTION: | |
| 898 return EVENT_OBJECT_SELECTION; | |
| 899 case ui::AX_EVENT_SELECTION_ADD: | |
| 900 return EVENT_OBJECT_SELECTIONADD; | |
| 901 case ui::AX_EVENT_SELECTION_REMOVE: | |
| 902 return EVENT_OBJECT_SELECTIONREMOVE; | |
| 903 case ui::AX_EVENT_TEXT_CHANGED: | |
| 904 return EVENT_OBJECT_NAMECHANGE; | |
| 905 case ui::AX_EVENT_TEXT_SELECTION_CHANGED: | |
| 906 return IA2_EVENT_TEXT_CARET_MOVED; | |
| 907 case ui::AX_EVENT_VALUE_CHANGED: | |
| 908 return EVENT_OBJECT_VALUECHANGE; | |
| 909 default: | |
| 910 return -1; | |
| 911 } | |
| 912 } | |
| 913 | |
| 914 HRESULT AXPlatformNodeWin::GetStringAttributeAsBstr( | |
| 915 ui::AXStringAttribute attribute, | |
| 916 BSTR* value_bstr) const { | |
| 917 base::string16 str; | |
| 918 | |
| 919 if (!GetString16Attribute(attribute, &str)) | |
| 920 return S_FALSE; | |
| 921 | |
| 922 if (str.empty()) | |
| 923 return S_FALSE; | |
| 924 | |
| 925 *value_bstr = SysAllocString(str.c_str()); | |
| 926 DCHECK(*value_bstr); | |
| 927 | |
| 928 return S_OK; | |
| 929 } | |
| 930 | |
| 931 void AXPlatformNodeWin::AddAlertTarget() { | |
| 932 g_alert_targets.Get().insert(this); | |
| 933 } | |
| 934 | |
| 935 void AXPlatformNodeWin::RemoveAlertTarget() { | |
| 936 if (g_alert_targets.Get().find(this) != g_alert_targets.Get().end()) | |
| 937 g_alert_targets.Get().erase(this); | |
| 938 } | |
| 939 | |
| 940 base::string16 AXPlatformNodeWin::TextForIAccessibleText() { | |
| 941 if (GetData().role == ui::AX_ROLE_TEXT_FIELD) | |
| 942 return GetString16Attribute(ui::AX_ATTR_VALUE); | |
| 943 else | |
| 944 return GetString16Attribute(ui::AX_ATTR_NAME); | |
| 945 } | |
| 946 | |
| 947 void AXPlatformNodeWin::HandleSpecialTextOffset( | |
| 948 const base::string16& text, LONG* offset) { | |
| 949 if (*offset == IA2_TEXT_OFFSET_LENGTH) { | |
| 950 *offset = static_cast<LONG>(text.size()); | |
| 951 } else if (*offset == IA2_TEXT_OFFSET_CARET) { | |
| 952 get_caretOffset(offset); | |
| 953 } | |
| 954 } | |
| 955 | |
| 956 ui::TextBoundaryType AXPlatformNodeWin::IA2TextBoundaryToTextBoundary( | |
| 957 IA2TextBoundaryType ia2_boundary) { | |
| 958 switch(ia2_boundary) { | |
| 959 case IA2_TEXT_BOUNDARY_CHAR: return ui::CHAR_BOUNDARY; | |
| 960 case IA2_TEXT_BOUNDARY_WORD: return ui::WORD_BOUNDARY; | |
| 961 case IA2_TEXT_BOUNDARY_LINE: return ui::LINE_BOUNDARY; | |
| 962 case IA2_TEXT_BOUNDARY_SENTENCE: return ui::SENTENCE_BOUNDARY; | |
| 963 case IA2_TEXT_BOUNDARY_PARAGRAPH: return ui::PARAGRAPH_BOUNDARY; | |
| 964 case IA2_TEXT_BOUNDARY_ALL: return ui::ALL_BOUNDARY; | |
| 965 default: | |
| 966 NOTREACHED(); | |
| 967 return ui::CHAR_BOUNDARY; | |
| 968 } | |
| 969 } | |
| 970 | |
| 971 LONG AXPlatformNodeWin::FindBoundary( | |
| 972 const base::string16& text, | |
| 973 IA2TextBoundaryType ia2_boundary, | |
| 974 LONG start_offset, | |
| 975 ui::TextBoundaryDirection direction) { | |
| 976 HandleSpecialTextOffset(text, &start_offset); | |
| 977 ui::TextBoundaryType boundary = IA2TextBoundaryToTextBoundary(ia2_boundary); | |
| 978 std::vector<int32> line_breaks; | |
| 979 return static_cast<LONG>(ui::FindAccessibleTextBoundary( | |
| 980 text, line_breaks, boundary, start_offset, direction)); | |
| 981 } | |
| 982 | |
| 983 } // namespace ui | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 949333002:
Revert of Implement NativeViewAccessibilityWin using AXPlatformNodeWin. (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master