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| 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 "ui/views/focus/focus_manager.h" | |
| 6 | |
| 7 #include <algorithm> | |
| 8 #include <vector> | |
| 9 | |
| 10 #include "base/auto_reset.h" | |
| 11 #include "base/logging.h" | |
| 12 #include "build/build_config.h" | |
| 13 #include "ui/base/accelerators/accelerator.h" | |
| 14 #include "ui/base/ime/input_method.h" | |
| 15 #include "ui/base/ime/text_input_client.h" | |
| 16 #include "ui/base/ime/text_input_focus_manager.h" | |
| 17 #include "ui/base/ui_base_switches_util.h" | |
| 18 #include "ui/events/event.h" | |
| 19 #include "ui/events/keycodes/keyboard_codes.h" | |
| 20 #include "ui/views/focus/focus_manager_delegate.h" | |
| 21 #include "ui/views/focus/focus_search.h" | |
| 22 #include "ui/views/focus/view_storage.h" | |
| 23 #include "ui/views/focus/widget_focus_manager.h" | |
| 24 #include "ui/views/view.h" | |
| 25 #include "ui/views/widget/root_view.h" | |
| 26 #include "ui/views/widget/widget.h" | |
| 27 #include "ui/views/widget/widget_delegate.h" | |
| 28 | |
| 29 namespace views { | |
| 30 | |
| 31 namespace { | |
| 32 | |
| 33 } // namespace | |
| 34 | |
| 35 bool FocusManager::shortcut_handling_suspended_ = false; | |
| 36 bool FocusManager::arrow_key_traversal_enabled_ = false; | |
| 37 | |
| 38 FocusManager::FocusManager(Widget* widget, FocusManagerDelegate* delegate) | |
| 39 : widget_(widget), | |
| 40 delegate_(delegate), | |
| 41 focused_view_(NULL), | |
| 42 accelerator_manager_(new ui::AcceleratorManager), | |
| 43 focus_change_reason_(kReasonDirectFocusChange), | |
| 44 is_changing_focus_(false) { | |
| 45 DCHECK(widget_); | |
| 46 stored_focused_view_storage_id_ = | |
| 47 ViewStorage::GetInstance()->CreateStorageID(); | |
| 48 } | |
| 49 | |
| 50 FocusManager::~FocusManager() { | |
| 51 } | |
| 52 | |
| 53 bool FocusManager::OnKeyEvent(const ui::KeyEvent& event) { | |
| 54 const int key_code = event.key_code(); | |
| 55 | |
| 56 if (event.type() != ui::ET_KEY_PRESSED && event.type() != ui::ET_KEY_RELEASED) | |
| 57 return false; | |
| 58 | |
| 59 if (shortcut_handling_suspended()) | |
| 60 return true; | |
| 61 | |
| 62 int modifiers = ui::EF_NONE; | |
| 63 if (event.IsShiftDown()) | |
| 64 modifiers |= ui::EF_SHIFT_DOWN; | |
| 65 if (event.IsControlDown()) | |
| 66 modifiers |= ui::EF_CONTROL_DOWN; | |
| 67 if (event.IsAltDown()) | |
| 68 modifiers |= ui::EF_ALT_DOWN; | |
| 69 #if defined(OS_MACOSX) || defined(OS_CHROMEOS) | |
| 70 if (event.IsCommandDown()) | |
| 71 modifiers |= ui::EF_COMMAND_DOWN; | |
| 72 #endif | |
| 73 ui::Accelerator accelerator(event.key_code(), modifiers); | |
| 74 accelerator.set_type(event.type()); | |
| 75 accelerator.set_is_repeat(event.IsRepeat()); | |
| 76 | |
| 77 if (event.type() == ui::ET_KEY_PRESSED) { | |
| 78 // If the focused view wants to process the key event as is, let it be. | |
| 79 if (focused_view_ && focused_view_->SkipDefaultKeyEventProcessing(event) && | |
| 80 !accelerator_manager_->HasPriorityHandler(accelerator)) | |
| 81 return true; | |
| 82 | |
| 83 // Intercept Tab related messages for focus traversal. | |
| 84 // Note that we don't do focus traversal if the root window is not part of | |
| 85 // the active window hierarchy as this would mean we have no focused view | |
| 86 // and would focus the first focusable view. | |
| 87 if (IsTabTraversalKeyEvent(event)) { | |
| 88 AdvanceFocus(event.IsShiftDown()); | |
| 89 return false; | |
| 90 } | |
| 91 | |
| 92 if (arrow_key_traversal_enabled_ && ProcessArrowKeyTraversal(event)) | |
| 93 return false; | |
| 94 | |
| 95 // Intercept arrow key messages to switch between grouped views. | |
| 96 if (focused_view_ && focused_view_->GetGroup() != -1 && | |
| 97 (key_code == ui::VKEY_UP || key_code == ui::VKEY_DOWN || | |
| 98 key_code == ui::VKEY_LEFT || key_code == ui::VKEY_RIGHT)) { | |
| 99 bool next = (key_code == ui::VKEY_RIGHT || key_code == ui::VKEY_DOWN); | |
| 100 View::Views views; | |
| 101 focused_view_->parent()->GetViewsInGroup(focused_view_->GetGroup(), | |
| 102 &views); | |
| 103 View::Views::const_iterator i( | |
| 104 std::find(views.begin(), views.end(), focused_view_)); | |
| 105 DCHECK(i != views.end()); | |
| 106 int index = static_cast<int>(i - views.begin()); | |
| 107 index += next ? 1 : -1; | |
| 108 if (index < 0) { | |
| 109 index = static_cast<int>(views.size()) - 1; | |
| 110 } else if (index >= static_cast<int>(views.size())) { | |
| 111 index = 0; | |
| 112 } | |
| 113 SetFocusedViewWithReason(views[index], kReasonFocusTraversal); | |
| 114 return false; | |
| 115 } | |
| 116 } | |
| 117 | |
| 118 // Process keyboard accelerators. | |
| 119 // If the key combination matches an accelerator, the accelerator is | |
| 120 // triggered, otherwise the key event is processed as usual. | |
| 121 if (ProcessAccelerator(accelerator)) { | |
| 122 // If a shortcut was activated for this keydown message, do not propagate | |
| 123 // the event further. | |
| 124 return false; | |
| 125 } | |
| 126 return true; | |
| 127 } | |
| 128 | |
| 129 void FocusManager::ValidateFocusedView() { | |
| 130 if (focused_view_ && !ContainsView(focused_view_)) | |
| 131 ClearFocus(); | |
| 132 } | |
| 133 | |
| 134 // Tests whether a view is valid, whether it still belongs to the window | |
| 135 // hierarchy of the FocusManager. | |
| 136 bool FocusManager::ContainsView(View* view) { | |
| 137 Widget* widget = view->GetWidget(); | |
| 138 return widget ? widget->GetFocusManager() == this : false; | |
| 139 } | |
| 140 | |
| 141 void FocusManager::AdvanceFocus(bool reverse) { | |
| 142 View* v = GetNextFocusableView(focused_view_, NULL, reverse, false); | |
| 143 // Note: Do not skip this next block when v == focused_view_. If the user | |
| 144 // tabs past the last focusable element in a webpage, we'll get here, and if | |
| 145 // the TabContentsContainerView is the only focusable view (possible in | |
| 146 // fullscreen mode), we need to run this block in order to cycle around to the | |
| 147 // first element on the page. | |
| 148 if (v) { | |
| 149 views::View* focused_view = focused_view_; | |
| 150 v->AboutToRequestFocusFromTabTraversal(reverse); | |
| 151 // AboutToRequestFocusFromTabTraversal() may have changed focus. If it did, | |
| 152 // don't change focus again. | |
| 153 if (focused_view == focused_view_) | |
| 154 SetFocusedViewWithReason(v, kReasonFocusTraversal); | |
| 155 } | |
| 156 } | |
| 157 | |
| 158 void FocusManager::ClearNativeFocus() { | |
| 159 // Keep the top root window focused so we get keyboard events. | |
| 160 widget_->ClearNativeFocus(); | |
| 161 } | |
| 162 | |
| 163 bool FocusManager::RotatePaneFocus(Direction direction, | |
| 164 FocusCycleWrappingBehavior wrap) { | |
| 165 // Get the list of all accessible panes. | |
| 166 std::vector<View*> panes; | |
| 167 widget_->widget_delegate()->GetAccessiblePanes(&panes); | |
| 168 | |
| 169 // Count the number of panes and set the default index if no pane | |
| 170 // is initially focused. | |
| 171 int count = static_cast<int>(panes.size()); | |
| 172 if (count == 0) | |
| 173 return false; | |
| 174 | |
| 175 // Initialize |index| to an appropriate starting index if nothing is | |
| 176 // focused initially. | |
| 177 int index = direction == kBackward ? 0 : count - 1; | |
| 178 | |
| 179 // Check to see if a pane already has focus and update the index accordingly. | |
| 180 const views::View* focused_view = GetFocusedView(); | |
| 181 if (focused_view) { | |
| 182 for (int i = 0; i < count; i++) { | |
| 183 if (panes[i] && panes[i]->Contains(focused_view)) { | |
| 184 index = i; | |
| 185 break; | |
| 186 } | |
| 187 } | |
| 188 } | |
| 189 | |
| 190 // Rotate focus. | |
| 191 int start_index = index; | |
| 192 for (;;) { | |
| 193 if (direction == kBackward) | |
| 194 index--; | |
| 195 else | |
| 196 index++; | |
| 197 | |
| 198 if (wrap == kNoWrap && (index >= count || index < 0)) | |
| 199 return false; | |
| 200 index = (index + count) % count; | |
| 201 | |
| 202 // Ensure that we don't loop more than once. | |
| 203 if (index == start_index) | |
| 204 break; | |
| 205 | |
| 206 views::View* pane = panes[index]; | |
| 207 DCHECK(pane); | |
| 208 | |
| 209 if (!pane->visible()) | |
| 210 continue; | |
| 211 | |
| 212 pane->RequestFocus(); | |
| 213 focused_view = GetFocusedView(); | |
| 214 if (pane == focused_view || pane->Contains(focused_view)) | |
| 215 return true; | |
| 216 } | |
| 217 | |
| 218 return false; | |
| 219 } | |
| 220 | |
| 221 View* FocusManager::GetNextFocusableView(View* original_starting_view, | |
| 222 Widget* starting_widget, | |
| 223 bool reverse, | |
| 224 bool dont_loop) { | |
| 225 FocusTraversable* focus_traversable = NULL; | |
| 226 | |
| 227 // Let's revalidate the focused view. | |
| 228 ValidateFocusedView(); | |
| 229 | |
| 230 View* starting_view = NULL; | |
| 231 if (original_starting_view) { | |
| 232 // Search up the containment hierarchy to see if a view is acting as | |
| 233 // a pane, and wants to implement its own focus traversable to keep | |
| 234 // the focus trapped within that pane. | |
| 235 View* pane_search = original_starting_view; | |
| 236 while (pane_search) { | |
| 237 focus_traversable = pane_search->GetPaneFocusTraversable(); | |
| 238 if (focus_traversable) { | |
| 239 starting_view = original_starting_view; | |
| 240 break; | |
| 241 } | |
| 242 pane_search = pane_search->parent(); | |
| 243 } | |
| 244 | |
| 245 if (!focus_traversable) { | |
| 246 if (!reverse) { | |
| 247 // If the starting view has a focus traversable, use it. | |
| 248 // This is the case with NativeWidgetWins for example. | |
| 249 focus_traversable = original_starting_view->GetFocusTraversable(); | |
| 250 | |
| 251 // Otherwise default to the root view. | |
| 252 if (!focus_traversable) { | |
| 253 focus_traversable = | |
| 254 original_starting_view->GetWidget()->GetFocusTraversable(); | |
| 255 starting_view = original_starting_view; | |
| 256 } | |
| 257 } else { | |
| 258 // When you are going back, starting view's FocusTraversable | |
| 259 // should not be used. | |
| 260 focus_traversable = | |
| 261 original_starting_view->GetWidget()->GetFocusTraversable(); | |
| 262 starting_view = original_starting_view; | |
| 263 } | |
| 264 } | |
| 265 } else { | |
| 266 Widget* widget = starting_widget ? starting_widget : widget_; | |
| 267 focus_traversable = widget->GetFocusTraversable(); | |
| 268 } | |
| 269 | |
| 270 // Traverse the FocusTraversable tree down to find the focusable view. | |
| 271 View* v = FindFocusableView(focus_traversable, starting_view, reverse); | |
| 272 if (v) { | |
| 273 return v; | |
| 274 } else { | |
| 275 // Let's go up in the FocusTraversable tree. | |
| 276 FocusTraversable* parent_focus_traversable = | |
| 277 focus_traversable->GetFocusTraversableParent(); | |
| 278 starting_view = focus_traversable->GetFocusTraversableParentView(); | |
| 279 while (parent_focus_traversable) { | |
| 280 FocusTraversable* new_focus_traversable = NULL; | |
| 281 View* new_starting_view = NULL; | |
| 282 // When we are going backward, the parent view might gain the next focus. | |
| 283 bool check_starting_view = reverse; | |
| 284 v = parent_focus_traversable->GetFocusSearch()->FindNextFocusableView( | |
| 285 starting_view, reverse, FocusSearch::UP, | |
| 286 check_starting_view, &new_focus_traversable, &new_starting_view); | |
| 287 | |
| 288 if (new_focus_traversable) { | |
| 289 DCHECK(!v); | |
| 290 | |
| 291 // There is a FocusTraversable, traverse it down. | |
| 292 v = FindFocusableView(new_focus_traversable, NULL, reverse); | |
| 293 } | |
| 294 | |
| 295 if (v) | |
| 296 return v; | |
| 297 | |
| 298 starting_view = focus_traversable->GetFocusTraversableParentView(); | |
| 299 parent_focus_traversable = | |
| 300 parent_focus_traversable->GetFocusTraversableParent(); | |
| 301 } | |
| 302 | |
| 303 // If we get here, we have reached the end of the focus hierarchy, let's | |
| 304 // loop. Make sure there was at least a view to start with, to prevent | |
| 305 // infinitely looping in empty windows. | |
| 306 if (!dont_loop && original_starting_view) { | |
| 307 // Easy, just clear the selection and press tab again. | |
| 308 // By calling with NULL as the starting view, we'll start from either | |
| 309 // the starting views widget or |widget_|. | |
| 310 Widget* widget = original_starting_view->GetWidget(); | |
| 311 if (widget->widget_delegate()->ShouldAdvanceFocusToTopLevelWidget()) | |
| 312 widget = widget_; | |
| 313 return GetNextFocusableView(NULL, widget, reverse, true); | |
| 314 } | |
| 315 } | |
| 316 return NULL; | |
| 317 } | |
| 318 | |
| 319 void FocusManager::SetFocusedViewWithReason( | |
| 320 View* view, FocusChangeReason reason) { | |
| 321 if (focused_view_ == view) { | |
| 322 // In the case that the widget lost the focus and gained it back without | |
| 323 // changing the focused view, we have to make the text input client focused. | |
| 324 // TODO(yukishiino): Remove this hack once we fix http://crbug.com/383236 | |
| 325 FocusTextInputClient(focused_view_); | |
| 326 return; | |
| 327 } | |
| 328 | |
| 329 base::AutoReset<bool> auto_changing_focus(&is_changing_focus_, true); | |
| 330 // Update the reason for the focus change (since this is checked by | |
| 331 // some listeners), then notify all listeners. | |
| 332 focus_change_reason_ = reason; | |
| 333 FOR_EACH_OBSERVER(FocusChangeListener, focus_change_listeners_, | |
| 334 OnWillChangeFocus(focused_view_, view)); | |
| 335 | |
| 336 View* old_focused_view = focused_view_; | |
| 337 focused_view_ = view; | |
| 338 if (old_focused_view) { | |
| 339 old_focused_view->Blur(); | |
| 340 BlurTextInputClient(old_focused_view); | |
| 341 } | |
| 342 // Also make |focused_view_| the stored focus view. This way the stored focus | |
| 343 // view is remembered if focus changes are requested prior to a show or while | |
| 344 // hidden. | |
| 345 SetStoredFocusView(focused_view_); | |
| 346 if (focused_view_) { | |
| 347 FocusTextInputClient(focused_view_); | |
| 348 focused_view_->Focus(); | |
| 349 } | |
| 350 | |
| 351 FOR_EACH_OBSERVER(FocusChangeListener, focus_change_listeners_, | |
| 352 OnDidChangeFocus(old_focused_view, focused_view_)); | |
| 353 } | |
| 354 | |
| 355 void FocusManager::ClearFocus() { | |
| 356 // SetFocusedView(NULL) is going to clear out the stored view to. We need to | |
| 357 // persist it in this case. | |
| 358 views::View* focused_view = GetStoredFocusView(); | |
| 359 SetFocusedView(NULL); | |
| 360 ClearNativeFocus(); | |
| 361 SetStoredFocusView(focused_view); | |
| 362 } | |
| 363 | |
| 364 void FocusManager::AdvanceFocusIfNecessary() { | |
| 365 // If widget is inactive, there is no focused view to check. The stored view | |
| 366 // will also be checked for focusability when it is being restored. | |
| 367 if (!widget_->IsActive()) | |
| 368 return; | |
| 369 | |
| 370 // If widget is active and focused view is not focusable, advance focus or, | |
| 371 // if not possible, clear focus. | |
| 372 if (focused_view_ && !focused_view_->IsAccessibilityFocusable()) { | |
| 373 AdvanceFocus(false); | |
| 374 if (focused_view_ && !focused_view_->IsAccessibilityFocusable()) | |
| 375 ClearFocus(); | |
| 376 } | |
| 377 } | |
| 378 | |
| 379 void FocusManager::StoreFocusedView(bool clear_native_focus) { | |
| 380 View* focused_view = focused_view_; | |
| 381 // Don't do anything if no focused view. Storing the view (which is NULL), in | |
| 382 // this case, would clobber the view that was previously saved. | |
| 383 if (!focused_view_) | |
| 384 return; | |
| 385 | |
| 386 View* v = focused_view_; | |
| 387 | |
| 388 if (clear_native_focus) { | |
| 389 // Temporarily disable notification. ClearFocus() will set the focus to the | |
| 390 // main browser window. This extra focus bounce which happens during | |
| 391 // deactivation can confuse registered WidgetFocusListeners, as the focus | |
| 392 // is not changing due to a user-initiated event. | |
| 393 AutoNativeNotificationDisabler local_notification_disabler; | |
| 394 // ClearFocus() also stores the focused view. | |
| 395 ClearFocus(); | |
| 396 } else { | |
| 397 SetFocusedView(NULL); | |
| 398 SetStoredFocusView(focused_view); | |
| 399 } | |
| 400 | |
| 401 if (v) | |
| 402 v->SchedulePaint(); // Remove focus border. | |
| 403 } | |
| 404 | |
| 405 bool FocusManager::RestoreFocusedView() { | |
| 406 View* view = GetStoredFocusView(); | |
| 407 if (view) { | |
| 408 if (ContainsView(view)) { | |
| 409 if (!view->IsFocusable() && view->IsAccessibilityFocusable()) { | |
| 410 // RequestFocus would fail, but we want to restore focus to controls | |
| 411 // that had focus in accessibility mode. | |
| 412 SetFocusedViewWithReason(view, kReasonFocusRestore); | |
| 413 } else { | |
| 414 // This usually just sets the focus if this view is focusable, but | |
| 415 // let the view override RequestFocus if necessary. | |
| 416 view->RequestFocus(); | |
| 417 | |
| 418 // If it succeeded, the reason would be incorrect; set it to | |
| 419 // focus restore. | |
| 420 if (focused_view_ == view) | |
| 421 focus_change_reason_ = kReasonFocusRestore; | |
| 422 } | |
| 423 } | |
| 424 return true; | |
| 425 } | |
| 426 return false; | |
| 427 } | |
| 428 | |
| 429 void FocusManager::SetStoredFocusView(View* focus_view) { | |
| 430 ViewStorage* view_storage = ViewStorage::GetInstance(); | |
| 431 if (!view_storage) { | |
| 432 // This should never happen but bug 981648 seems to indicate it could. | |
| 433 NOTREACHED(); | |
| 434 return; | |
| 435 } | |
| 436 | |
| 437 // TODO(jcivelli): when a TabContents containing a popup is closed, the focus | |
| 438 // is stored twice causing an assert. We should find a better alternative than | |
| 439 // removing the view from the storage explicitly. | |
| 440 view_storage->RemoveView(stored_focused_view_storage_id_); | |
| 441 | |
| 442 if (!focus_view) | |
| 443 return; | |
| 444 | |
| 445 view_storage->StoreView(stored_focused_view_storage_id_, focus_view); | |
| 446 } | |
| 447 | |
| 448 View* FocusManager::GetStoredFocusView() { | |
| 449 ViewStorage* view_storage = ViewStorage::GetInstance(); | |
| 450 if (!view_storage) { | |
| 451 // This should never happen but bug 981648 seems to indicate it could. | |
| 452 NOTREACHED(); | |
| 453 return NULL; | |
| 454 } | |
| 455 | |
| 456 return view_storage->RetrieveView(stored_focused_view_storage_id_); | |
| 457 } | |
| 458 | |
| 459 void FocusManager::ClearStoredFocusedView() { | |
| 460 SetStoredFocusView(NULL); | |
| 461 } | |
| 462 | |
| 463 void FocusManager::OnTextInputClientChanged(View* view) { | |
| 464 if (view == focused_view_) | |
| 465 FocusTextInputClient(view); | |
| 466 } | |
| 467 | |
| 468 void FocusManager::FocusTextInputClient(View* view) { | |
| 469 if (!switches::IsTextInputFocusManagerEnabled()) | |
| 470 return; | |
| 471 | |
| 472 // If the widget is not active, do not steal the text input focus. | |
| 473 if (!widget_->IsActive()) | |
| 474 return; | |
| 475 | |
| 476 ui::TextInputClient* text_input_client = | |
| 477 view ? view->GetTextInputClient() : NULL; | |
| 478 ui::TextInputFocusManager::GetInstance()-> | |
| 479 FocusTextInputClient(text_input_client); | |
| 480 ui::InputMethod* input_method = widget_->GetHostInputMethod(); | |
| 481 if (input_method) { | |
| 482 input_method->OnTextInputTypeChanged(text_input_client); | |
| 483 input_method->OnCaretBoundsChanged(text_input_client); | |
| 484 } | |
| 485 } | |
| 486 | |
| 487 void FocusManager::BlurTextInputClient(View* view) { | |
| 488 if (!switches::IsTextInputFocusManagerEnabled()) | |
| 489 return; | |
| 490 | |
| 491 ui::TextInputClient* text_input_client = | |
| 492 view ? view->GetTextInputClient() : NULL; | |
| 493 if (text_input_client && text_input_client->HasCompositionText()) { | |
| 494 text_input_client->ConfirmCompositionText(); | |
| 495 ui::InputMethod* input_method = widget_->GetHostInputMethod(); | |
| 496 if (input_method && input_method->GetTextInputClient() == text_input_client) | |
| 497 input_method->CancelComposition(text_input_client); | |
| 498 } | |
| 499 ui::TextInputFocusManager::GetInstance()-> | |
| 500 BlurTextInputClient(text_input_client); | |
| 501 } | |
| 502 | |
| 503 // Find the next (previous if reverse is true) focusable view for the specified | |
| 504 // FocusTraversable, starting at the specified view, traversing down the | |
| 505 // FocusTraversable hierarchy. | |
| 506 View* FocusManager::FindFocusableView(FocusTraversable* focus_traversable, | |
| 507 View* starting_view, | |
| 508 bool reverse) { | |
| 509 FocusTraversable* new_focus_traversable = NULL; | |
| 510 View* new_starting_view = NULL; | |
| 511 View* v = focus_traversable->GetFocusSearch()->FindNextFocusableView( | |
| 512 starting_view, | |
| 513 reverse, | |
| 514 FocusSearch::DOWN, | |
| 515 false, | |
| 516 &new_focus_traversable, | |
| 517 &new_starting_view); | |
| 518 | |
| 519 // Let's go down the FocusTraversable tree as much as we can. | |
| 520 while (new_focus_traversable) { | |
| 521 DCHECK(!v); | |
| 522 focus_traversable = new_focus_traversable; | |
| 523 new_focus_traversable = NULL; | |
| 524 starting_view = NULL; | |
| 525 v = focus_traversable->GetFocusSearch()->FindNextFocusableView( | |
| 526 starting_view, | |
| 527 reverse, | |
| 528 FocusSearch::DOWN, | |
| 529 false, | |
| 530 &new_focus_traversable, | |
| 531 &new_starting_view); | |
| 532 } | |
| 533 return v; | |
| 534 } | |
| 535 | |
| 536 void FocusManager::RegisterAccelerator( | |
| 537 const ui::Accelerator& accelerator, | |
| 538 ui::AcceleratorManager::HandlerPriority priority, | |
| 539 ui::AcceleratorTarget* target) { | |
| 540 accelerator_manager_->Register(accelerator, priority, target); | |
| 541 } | |
| 542 | |
| 543 void FocusManager::UnregisterAccelerator(const ui::Accelerator& accelerator, | |
| 544 ui::AcceleratorTarget* target) { | |
| 545 accelerator_manager_->Unregister(accelerator, target); | |
| 546 } | |
| 547 | |
| 548 void FocusManager::UnregisterAccelerators(ui::AcceleratorTarget* target) { | |
| 549 accelerator_manager_->UnregisterAll(target); | |
| 550 } | |
| 551 | |
| 552 bool FocusManager::ProcessAccelerator(const ui::Accelerator& accelerator) { | |
| 553 if (accelerator_manager_->Process(accelerator)) | |
| 554 return true; | |
| 555 if (delegate_.get()) | |
| 556 return delegate_->ProcessAccelerator(accelerator); | |
| 557 return false; | |
| 558 } | |
| 559 | |
| 560 ui::AcceleratorTarget* FocusManager::GetCurrentTargetForAccelerator( | |
| 561 const ui::Accelerator& accelerator) const { | |
| 562 ui::AcceleratorTarget* target = | |
| 563 accelerator_manager_->GetCurrentTarget(accelerator); | |
| 564 if (!target && delegate_.get()) | |
| 565 target = delegate_->GetCurrentTargetForAccelerator(accelerator); | |
| 566 return target; | |
| 567 } | |
| 568 | |
| 569 bool FocusManager::HasPriorityHandler( | |
| 570 const ui::Accelerator& accelerator) const { | |
| 571 return accelerator_manager_->HasPriorityHandler(accelerator); | |
| 572 } | |
| 573 | |
| 574 // static | |
| 575 bool FocusManager::IsTabTraversalKeyEvent(const ui::KeyEvent& key_event) { | |
| 576 return key_event.key_code() == ui::VKEY_TAB && !key_event.IsControlDown(); | |
| 577 } | |
| 578 | |
| 579 void FocusManager::ViewRemoved(View* removed) { | |
| 580 // If the view being removed contains (or is) the focused view, | |
| 581 // clear the focus. However, it's not safe to call ClearFocus() | |
| 582 // (and in turn ClearNativeFocus()) here because ViewRemoved() can | |
| 583 // be called while the top level widget is being destroyed. | |
| 584 if (focused_view_ && removed->Contains(focused_view_)) | |
| 585 SetFocusedView(NULL); | |
| 586 } | |
| 587 | |
| 588 void FocusManager::AddFocusChangeListener(FocusChangeListener* listener) { | |
| 589 focus_change_listeners_.AddObserver(listener); | |
| 590 } | |
| 591 | |
| 592 void FocusManager::RemoveFocusChangeListener(FocusChangeListener* listener) { | |
| 593 focus_change_listeners_.RemoveObserver(listener); | |
| 594 } | |
| 595 | |
| 596 bool FocusManager::ProcessArrowKeyTraversal(const ui::KeyEvent& event) { | |
| 597 if (event.IsShiftDown() || event.IsControlDown() || event.IsAltDown()) | |
| 598 return false; | |
| 599 | |
| 600 const int key_code = event.key_code(); | |
| 601 if (key_code == ui::VKEY_LEFT || key_code == ui::VKEY_UP) { | |
| 602 AdvanceFocus(true); | |
| 603 return true; | |
| 604 } | |
| 605 if (key_code == ui::VKEY_RIGHT || key_code == ui::VKEY_DOWN) { | |
| 606 AdvanceFocus(false); | |
| 607 return true; | |
| 608 } | |
| 609 | |
| 610 return false; | |
| 611 } | |
| 612 | |
| 613 } // namespace views | |
| OLD | NEW |
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