src/ash/accelerators/accelerator_controller.cc

   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 "ash/accelerators/accelerator_controller.h"
   6
   7 #include <algorithm>
   8 #include <cmath>
   9 #include <iostream>
  10 #include <string>
  11
  12 #include "ash/accelerators/accelerator_commands.h"
  13 #include "ash/accelerators/accelerator_table.h"
  14 #include "ash/accelerators/debug_commands.h"
  15 #include "ash/ash_switches.h"
  16 #include "ash/debug.h"
  17 #include "ash/display/display_controller.h"
  18 #include "ash/display/display_manager.h"
  19 #include "ash/focus_cycler.h"
  20 #include "ash/gpu_support.h"
  21 #include "ash/host/ash_window_tree_host.h"
  22 #include "ash/ime_control_delegate.h"
  23 #include "ash/magnifier/magnification_controller.h"
  24 #include "ash/magnifier/partial_magnification_controller.h"
  25 #include "ash/media_delegate.h"
  26 #include "ash/multi_profile_uma.h"
  27 #include "ash/new_window_delegate.h"
  28 #include "ash/root_window_controller.h"
  29 #include "ash/rotator/screen_rotation.h"
  30 #include "ash/screenshot_delegate.h"
  31 #include "ash/session/session_state_delegate.h"
  32 #include "ash/shelf/shelf.h"
  33 #include "ash/shelf/shelf_delegate.h"
  34 #include "ash/shelf/shelf_model.h"
  35 #include "ash/shelf/shelf_widget.h"
  36 #include "ash/shell.h"
  37 #include "ash/shell_delegate.h"
  38 #include "ash/shell_window_ids.h"
  39 #include "ash/system/brightness_control_delegate.h"
  40 #include "ash/system/keyboard_brightness/keyboard_brightness_control_delegate.h"
  41 #include "ash/system/status_area_widget.h"
  42 #include "ash/system/tray/system_tray.h"
  43 #include "ash/system/tray/system_tray_delegate.h"
  44 #include "ash/system/tray/system_tray_notifier.h"
  45 #include "ash/system/web_notification/web_notification_tray.h"
  46 #include "ash/touch/touch_hud_debug.h"
  47 #include "ash/volume_control_delegate.h"
  48 #include "ash/wm/mru_window_tracker.h"
  49 #include "ash/wm/overview/window_selector_controller.h"
  50 #include "ash/wm/partial_screenshot_view.h"
  51 #include "ash/wm/power_button_controller.h"
  52 #include "ash/wm/window_state.h"
  53 #include "ash/wm/window_util.h"
  54 #include "ash/wm/wm_event.h"
  55 #include "base/bind.h"
  56 #include "base/command_line.h"
  57 #include "base/metrics/user_metrics.h"
  58 #include "ui/aura/env.h"
  59 #include "ui/aura/window_event_dispatcher.h"
  60 #include "ui/base/accelerators/accelerator.h"
  61 #include "ui/base/accelerators/accelerator_manager.h"
  62 #include "ui/compositor/debug_utils.h"
  63 #include "ui/compositor/layer.h"
  64 #include "ui/compositor/layer_animation_sequence.h"
  65 #include "ui/compositor/layer_animator.h"
  66 #include "ui/events/event.h"
  67 #include "ui/events/keycodes/keyboard_codes.h"
  68 #include "ui/gfx/screen.h"
  69 #include "ui/views/controls/webview/webview.h"
  70 #include "ui/views/debug_utils.h"
  71 #include "ui/views/widget/widget.h"
  72
  73 #if defined(OS_CHROMEOS)
  74 #include "ash/session/session_state_delegate.h"
  75 #include "ash/system/chromeos/keyboard_brightness_controller.h"
  76 #include "base/sys_info.h"
  77 #include "chromeos/ime/ime_keyboard.h"
  78 #include "chromeos/ime/input_method_manager.h"
  79 #endif  // defined(OS_CHROMEOS)
  80
  81 namespace ash {
  82 namespace {
  83
  84 using base::UserMetricsAction;
  85
  86 bool DebugShortcutsEnabled() {
  87 #if defined(NDEBUG)
  88   return CommandLine::ForCurrentProcess()->HasSwitch(
  89           switches::kAshDebugShortcuts);
  90 #else
  91   return true;
  92 #endif
  93 }
  94
  95 bool HandleAccessibleFocusCycle(bool reverse) {
  96   if (reverse) {
  97     base::RecordAction(UserMetricsAction("Accel_Accessible_Focus_Previous"));
  98   } else {
  99     base::RecordAction(UserMetricsAction("Accel_Accessible_Focus_Next"));
 100   }
 101
 102   if (!Shell::GetInstance()->accessibility_delegate()->
 103       IsSpokenFeedbackEnabled()) {
 104     return false;
 105   }
 106   aura::Window* active_window = ash::wm::GetActiveWindow();
 107   if (!active_window)
 108     return false;
 109   views::Widget* widget =
 110       views::Widget::GetWidgetForNativeWindow(active_window);
 111   if (!widget)
 112     return false;
 113   views::FocusManager* focus_manager = widget->GetFocusManager();
 114   if (!focus_manager)
 115     return false;
 116   views::View* view = focus_manager->GetFocusedView();
 117   if (!view)
 118     return false;
 119   if (!strcmp(view->GetClassName(), views::WebView::kViewClassName))
 120     return false;
 121
 122   focus_manager->AdvanceFocus(reverse);
 123   return true;
 124 }
 125
 126 bool HandleCycleBackwardMRU(const ui::Accelerator& accelerator) {
 127   if (accelerator.key_code() == ui::VKEY_TAB)
 128     base::RecordAction(base::UserMetricsAction("Accel_PrevWindow_Tab"));
 129
 130   Shell::GetInstance()->window_selector_controller()->HandleCycleWindow(
 131       WindowSelector::BACKWARD);
 132   return true;
 133 }
 134
 135 bool HandleCycleForwardMRU(const ui::Accelerator& accelerator) {
 136   if (accelerator.key_code() == ui::VKEY_TAB)
 137     base::RecordAction(base::UserMetricsAction("Accel_NextWindow_Tab"));
 138
 139   Shell::GetInstance()->window_selector_controller()->HandleCycleWindow(
 140       WindowSelector::FORWARD);
 141   return true;
 142 }
 143
 144 bool ToggleOverview(const ui::Accelerator& accelerator) {
 145   base::RecordAction(base::UserMetricsAction("Accel_Overview_F5"));
 146   Shell::GetInstance()->window_selector_controller()->ToggleOverview();
 147   return true;
 148 }
 149
 150 bool HandleFocusLauncher() {
 151   Shell* shell = Shell::GetInstance();
 152   base::RecordAction(base::UserMetricsAction("Accel_Focus_Launcher"));
 153   return shell->focus_cycler()->FocusWidget(
 154       Shelf::ForPrimaryDisplay()->shelf_widget());
 155 }
 156
 157 bool HandleLaunchAppN(int n) {
 158   base::RecordAction(UserMetricsAction("Accel_Launch_App"));
 159   Shelf::ForPrimaryDisplay()->LaunchAppIndexAt(n);
 160   return true;
 161 }
 162
 163 bool HandleLaunchLastApp() {
 164   base::RecordAction(UserMetricsAction("Accel_Launch_Last_App"));
 165   Shelf::ForPrimaryDisplay()->LaunchAppIndexAt(-1);
 166   return true;
 167 }
 168
 169 // Magnify the screen
 170 bool HandleMagnifyScreen(int delta_index) {
 171   if (ash::Shell::GetInstance()->magnification_controller()->IsEnabled()) {
 172     // TODO(yoshiki): Move the following logic to MagnificationController.
 173     float scale =
 174         ash::Shell::GetInstance()->magnification_controller()->GetScale();
 175     // Calculate rounded logarithm (base kMagnificationScaleFactor) of scale.
 176     int scale_index =
 177         std::floor(std::log(scale) / std::log(kMagnificationScaleFactor) + 0.5);
 178
 179     int new_scale_index = std::max(0, std::min(8, scale_index + delta_index));
 180
 181     ash::Shell::GetInstance()->magnification_controller()->
 182         SetScale(std::pow(kMagnificationScaleFactor, new_scale_index), true);
 183   } else if (ash::Shell::GetInstance()->
 184              partial_magnification_controller()->is_enabled()) {
 185     float scale = delta_index > 0 ? kDefaultPartialMagnifiedScale : 1;
 186     ash::Shell::GetInstance()->partial_magnification_controller()->
 187         SetScale(scale);
 188   }
 189
 190   return true;
 191 }
 192
 193 bool HandleMediaNextTrack() {
 194   Shell::GetInstance()->media_delegate()->HandleMediaNextTrack();
 195   return true;
 196 }
 197
 198 bool HandleMediaPlayPause() {
 199   Shell::GetInstance()->media_delegate()->HandleMediaPlayPause();
 200   return true;
 201 }
 202
 203 bool HandleMediaPrevTrack() {
 204   Shell::GetInstance()->media_delegate()->HandleMediaPrevTrack();
 205   return true;
 206 }
 207
 208 bool HandleNewIncognitoWindow() {
 209   base::RecordAction(UserMetricsAction("Accel_New_Incognito_Window"));
 210   bool incognito_allowed =
 211     Shell::GetInstance()->delegate()->IsIncognitoAllowed();
 212   if (incognito_allowed)
 213     Shell::GetInstance()->new_window_delegate()->NewWindow(
 214         true /* is_incognito */);
 215   return incognito_allowed;
 216 }
 217
 218 bool HandleNewTab(ui::KeyboardCode key_code) {
 219   if (key_code == ui::VKEY_T)
 220     base::RecordAction(base::UserMetricsAction("Accel_NewTab_T"));
 221   Shell::GetInstance()->new_window_delegate()->NewTab();
 222   return true;
 223 }
 224
 225 bool HandleNewWindow() {
 226   base::RecordAction(base::UserMetricsAction("Accel_New_Window"));
 227   Shell::GetInstance()->new_window_delegate()->NewWindow(
 228       false /* is_incognito */);
 229   return true;
 230 }
 231
 232 bool HandleNextIme(ImeControlDelegate* ime_control_delegate,
 233                    ui::EventType previous_event_type,
 234                    ui::KeyboardCode previous_key_code) {
 235   // This check is necessary e.g. not to process the Shift+Alt+
 236   // ET_KEY_RELEASED accelerator for Chrome OS (see ash/accelerators/
 237   // accelerator_controller.cc) when Shift+Alt+Tab is pressed and then Tab
 238   // is released.
 239   if (previous_event_type == ui::ET_KEY_RELEASED &&
 240       // Workaround for crbug.com/139556. CJK IME users tend to press
 241       // Enter (or Space) and Shift+Alt almost at the same time to commit
 242       // an IME string and then switch from the IME to the English layout.
 243       // This workaround allows the user to trigger NEXT_IME even if the
 244       // user presses Shift+Alt before releasing Enter.
 245       // TODO(nona|mazda): Fix crbug.com/139556 in a cleaner way.
 246       previous_key_code != ui::VKEY_RETURN &&
 247       previous_key_code != ui::VKEY_SPACE) {
 248     // We totally ignore this accelerator.
 249     // TODO(mazda): Fix crbug.com/158217
 250     return false;
 251   }
 252   base::RecordAction(UserMetricsAction("Accel_Next_Ime"));
 253   if (ime_control_delegate)
 254     return ime_control_delegate->HandleNextIme();
 255   return false;
 256 }
 257
 258 bool HandleOpenFeedbackPage() {
 259   base::RecordAction(UserMetricsAction("Accel_Open_Feedback_Page"));
 260   ash::Shell::GetInstance()->new_window_delegate()->OpenFeedbackPage();
 261   return true;
 262 }
 263
 264 bool HandlePositionCenter() {
 265   base::RecordAction(UserMetricsAction("Accel_Window_Position_Center"));
 266   aura::Window* window = wm::GetActiveWindow();
 267   // Docked windows do not support centering and ignore accelerator.
 268   if (window && !wm::GetWindowState(window)->IsDocked()) {
 269     wm::CenterWindow(window);
 270     return true;
 271   }
 272   return false;
 273 }
 274
 275 bool HandlePreviousIme(ImeControlDelegate* ime_control_delegate,
 276                        const ui::Accelerator& accelerator) {
 277   base::RecordAction(UserMetricsAction("Accel_Previous_Ime"));
 278   if (ime_control_delegate)
 279     return ime_control_delegate->HandlePreviousIme(accelerator);
 280   return false;
 281 }
 282
 283 bool HandleRestoreTab() {
 284   base::RecordAction(base::UserMetricsAction("Accel_Restore_Tab"));
 285   Shell::GetInstance()->new_window_delegate()->RestoreTab();
 286   return true;
 287 }
 288
 289 bool HandleRotatePaneFocus(Shell::Direction direction) {
 290   Shell* shell = Shell::GetInstance();
 291   switch (direction) {
 292     // TODO(stevet): Not sure if this is the same as IDC_FOCUS_NEXT_PANE.
 293     case Shell::FORWARD: {
 294       base::RecordAction(UserMetricsAction("Accel_Focus_Next_Pane"));
 295       shell->focus_cycler()->RotateFocus(FocusCycler::FORWARD);
 296       break;
 297     }
 298     case Shell::BACKWARD: {
 299       base::RecordAction(UserMetricsAction("Accel_Focus_Previous_Pane"));
 300       shell->focus_cycler()->RotateFocus(FocusCycler::BACKWARD);
 301       break;
 302     }
 303   }
 304   return true;
 305 }
 306
 307 // Rotate the active window.
 308 bool HandleRotateActiveWindow() {
 309   base::RecordAction(UserMetricsAction("Accel_Rotate_Window"));
 310   aura::Window* active_window = wm::GetActiveWindow();
 311   if (active_window) {
 312     // The rotation animation bases its target transform on the current
 313     // rotation and position. Since there could be an animation in progress
 314     // right now, queue this animation so when it starts it picks up a neutral
 315     // rotation and position. Use replace so we only enqueue one at a time.
 316     active_window->layer()->GetAnimator()->
 317         set_preemption_strategy(ui::LayerAnimator::REPLACE_QUEUED_ANIMATIONS);
 318     active_window->layer()->GetAnimator()->StartAnimation(
 319         new ui::LayerAnimationSequence(
 320             new ash::ScreenRotation(360, active_window->layer())));
 321   }
 322   return true;
 323 }
 324
 325 gfx::Display::Rotation GetNextRotation(gfx::Display::Rotation current) {
 326   switch (current) {
 327     case gfx::Display::ROTATE_0:
 328       return gfx::Display::ROTATE_90;
 329     case gfx::Display::ROTATE_90:
 330       return gfx::Display::ROTATE_180;
 331     case gfx::Display::ROTATE_180:
 332       return gfx::Display::ROTATE_270;
 333     case gfx::Display::ROTATE_270:
 334       return gfx::Display::ROTATE_0;
 335   }
 336   NOTREACHED() << "Unknown rotation:" << current;
 337   return gfx::Display::ROTATE_0;
 338 }
 339
 340 // Rotates the screen.
 341 bool HandleRotateScreen() {
 342   base::RecordAction(UserMetricsAction("Accel_Rotate_Window"));
 343   gfx::Point point = Shell::GetScreen()->GetCursorScreenPoint();
 344   gfx::Display display = Shell::GetScreen()->GetDisplayNearestPoint(point);
 345   const DisplayInfo& display_info =
 346       Shell::GetInstance()->display_manager()->GetDisplayInfo(display.id());
 347   Shell::GetInstance()->display_manager()->SetDisplayRotation(
 348       display.id(), GetNextRotation(display_info.rotation()));
 349   return true;
 350 }
 351
 352 bool HandleScaleReset() {
 353   DisplayManager* display_manager = Shell::GetInstance()->display_manager();
 354   int64 display_id = display_manager->GetDisplayIdForUIScaling();
 355   if (display_id == gfx::Display::kInvalidDisplayID)
 356     return false;
 357
 358   base::RecordAction(UserMetricsAction("Accel_Scale_Ui_Reset"));
 359
 360   display_manager->SetDisplayUIScale(display_id, 1.0f);
 361   return true;
 362 }
 363
 364 bool HandleScaleUI(bool up) {
 365   DisplayManager* display_manager = Shell::GetInstance()->display_manager();
 366   int64 display_id = display_manager->GetDisplayIdForUIScaling();
 367   if (display_id == gfx::Display::kInvalidDisplayID)
 368     return false;
 369
 370   if (up) {
 371     base::RecordAction(UserMetricsAction("Accel_Scale_Ui_Up"));
 372   } else {
 373     base::RecordAction(UserMetricsAction("Accel_Scale_Ui_Down"));
 374   }
 375
 376   const DisplayInfo& display_info = display_manager->GetDisplayInfo(display_id);
 377   float next_scale = DisplayManager::GetNextUIScale(display_info, up);
 378   display_manager->SetDisplayUIScale(display_id, next_scale);
 379   return true;
 380 }
 381
 382 #if defined(OS_CHROMEOS)
 383 bool HandleSwapPrimaryDisplay() {
 384   base::RecordAction(UserMetricsAction("Accel_Swap_Primary_Display"));
 385   Shell::GetInstance()->display_controller()->SwapPrimaryDisplay();
 386   return true;
 387 }
 388 #endif
 389
 390 bool HandleShowKeyboardOverlay() {
 391   base::RecordAction(UserMetricsAction("Accel_Show_Keyboard_Overlay"));
 392   ash::Shell::GetInstance()->new_window_delegate()->ShowKeyboardOverlay();
 393
 394   return true;
 395 }
 396
 397 void HandleShowMessageCenterBubble() {
 398   base::RecordAction(UserMetricsAction("Accel_Show_Message_Center_Bubble"));
 399   RootWindowController* controller =
 400       RootWindowController::ForTargetRootWindow();
 401   StatusAreaWidget* status_area_widget =
 402       controller->shelf()->status_area_widget();
 403   if (status_area_widget) {
 404     WebNotificationTray* notification_tray =
 405       status_area_widget->web_notification_tray();
 406     if (notification_tray->visible())
 407       notification_tray->ShowMessageCenterBubble();
 408   }
 409 }
 410
 411 bool HandleShowSystemTrayBubble() {
 412   base::RecordAction(UserMetricsAction("Accel_Show_System_Tray_Bubble"));
 413   RootWindowController* controller =
 414       RootWindowController::ForTargetRootWindow();
 415   if (!controller->GetSystemTray()->HasSystemBubble()) {
 416     controller->GetSystemTray()->ShowDefaultView(BUBBLE_CREATE_NEW);
 417     return true;
 418   }
 419   return false;
 420 }
 421
 422 bool HandleShowTaskManager() {
 423   base::RecordAction(UserMetricsAction("Accel_Show_Task_Manager"));
 424   Shell::GetInstance()->new_window_delegate()->ShowTaskManager();
 425   return true;
 426 }
 427
 428 #if defined(OS_CHROMEOS)
 429 void HandleSilenceSpokenFeedback() {
 430   base::RecordAction(UserMetricsAction("Accel_Silence_Spoken_Feedback"));
 431
 432   AccessibilityDelegate* delegate =
 433       Shell::GetInstance()->accessibility_delegate();
 434   if (!delegate->IsSpokenFeedbackEnabled())
 435     return;
 436   delegate->SilenceSpokenFeedback();
 437 }
 438 #endif
 439
 440 bool HandleSwitchIme(ImeControlDelegate* ime_control_delegate,
 441                      const ui::Accelerator& accelerator) {
 442   base::RecordAction(UserMetricsAction("Accel_Switch_Ime"));
 443   if (ime_control_delegate)
 444     return ime_control_delegate->HandleSwitchIme(accelerator);
 445   return false;
 446 }
 447
 448 bool HandleTakePartialScreenshot(ScreenshotDelegate* screenshot_delegate) {
 449   base::RecordAction(UserMetricsAction("Accel_Take_Partial_Screenshot"));
 450   if (screenshot_delegate) {
 451     ash::PartialScreenshotView::StartPartialScreenshot(
 452         screenshot_delegate);
 453   }
 454   // Return true to prevent propagation of the key event because
 455   // this key combination is reserved for partial screenshot.
 456   return true;
 457 }
 458
 459 bool HandleTakeScreenshot(ScreenshotDelegate* screenshot_delegate) {
 460   base::RecordAction(UserMetricsAction("Accel_Take_Screenshot"));
 461   if (screenshot_delegate &&
 462       screenshot_delegate->CanTakeScreenshot()) {
 463     screenshot_delegate->HandleTakeScreenshotForAllRootWindows();
 464   }
 465   // Return true to prevent propagation of the key event.
 466   return true;
 467 }
 468
 469 bool HandleToggleAppList(ui::KeyboardCode key_code,
 470                          ui::EventType previous_event_type,
 471                          ui::KeyboardCode previous_key_code,
 472                          const ui::Accelerator& accelerator) {
 473   // If something else was pressed between the Search key (LWIN)
 474   // being pressed and released, then ignore the release of the
 475   // Search key.
 476   if (key_code == ui::VKEY_LWIN &&
 477       (previous_event_type == ui::ET_KEY_RELEASED ||
 478        previous_key_code != ui::VKEY_LWIN))
 479     return false;
 480   if (key_code == ui::VKEY_LWIN)
 481     base::RecordAction(base::UserMetricsAction("Accel_Search_LWin"));
 482   // When spoken feedback is enabled, we should neither toggle the list nor
 483   // consume the key since Search+Shift is one of the shortcuts the a11y
 484   // feature uses. crbug.com/132296
 485   DCHECK_EQ(ui::VKEY_LWIN, accelerator.key_code());
 486   if (Shell::GetInstance()->accessibility_delegate()->
 487       IsSpokenFeedbackEnabled())
 488     return false;
 489   ash::Shell::GetInstance()->ToggleAppList(NULL);
 490   return true;
 491 }
 492
 493 bool HandleToggleFullscreen(ui::KeyboardCode key_code) {
 494   if (key_code == ui::VKEY_MEDIA_LAUNCH_APP2) {
 495     base::RecordAction(UserMetricsAction("Accel_Fullscreen_F4"));
 496   }
 497   accelerators::ToggleFullscreen();
 498   return true;
 499 }
 500
 501 bool HandleToggleRootWindowFullScreen() {
 502   Shell::GetPrimaryRootWindowController()->ash_host()->ToggleFullScreen();
 503   return true;
 504 }
 505
 506 bool HandleWindowSnap(int action) {
 507   wm::WindowState* window_state = wm::GetActiveWindowState();
 508   // Disable window snapping shortcut key for full screen window due to
 509   // http://crbug.com/135487.
 510   if (!window_state ||
 511       window_state->window()->type() != ui::wm::WINDOW_TYPE_NORMAL ||
 512       window_state->IsFullscreen()) {
 513     return false;
 514   }
 515
 516   if (action == WINDOW_SNAP_LEFT) {
 517     base::RecordAction(UserMetricsAction("Accel_Window_Snap_Left"));
 518   } else {
 519     base::RecordAction(UserMetricsAction("Accel_Window_Snap_Right"));
 520   }
 521   const wm::WMEvent event(action == WINDOW_SNAP_LEFT ?
 522                           wm::WM_EVENT_SNAP_LEFT : wm::WM_EVENT_SNAP_RIGHT);
 523   window_state->OnWMEvent(&event);
 524   return true;
 525 }
 526
 527 bool HandleWindowMinimize() {
 528   base::RecordAction(
 529       base::UserMetricsAction("Accel_Toggle_Minimized_Minus"));
 530   return accelerators::ToggleMinimized();
 531 }
 532
 533 #if defined(OS_CHROMEOS)
 534 bool HandleAddRemoveDisplay() {
 535   base::RecordAction(UserMetricsAction("Accel_Add_Remove_Display"));
 536   Shell::GetInstance()->display_manager()->AddRemoveDisplay();
 537   return true;
 538 }
 539
 540 bool HandleCrosh() {
 541   base::RecordAction(UserMetricsAction("Accel_Open_Crosh"));
 542
 543   Shell::GetInstance()->new_window_delegate()->OpenCrosh();
 544   return true;
 545 }
 546
 547 bool HandleFileManager() {
 548   base::RecordAction(UserMetricsAction("Accel_Open_File_Manager"));
 549
 550   Shell::GetInstance()->new_window_delegate()->OpenFileManager();
 551   return true;
 552 }
 553
 554 bool HandleLock(ui::KeyboardCode key_code) {
 555   base::RecordAction(UserMetricsAction("Accel_LockScreen_L"));
 556   Shell::GetInstance()->session_state_delegate()->LockScreen();
 557   return true;
 558 }
 559
 560 bool HandleCycleUser(SessionStateDelegate::CycleUser cycle_user) {
 561   if (!Shell::GetInstance()->delegate()->IsMultiProfilesEnabled())
 562     return false;
 563   ash::SessionStateDelegate* delegate =
 564       ash::Shell::GetInstance()->session_state_delegate();
 565   if (delegate->NumberOfLoggedInUsers() <= 1)
 566     return false;
 567   MultiProfileUMA::RecordSwitchActiveUser(
 568       MultiProfileUMA::SWITCH_ACTIVE_USER_BY_ACCELERATOR);
 569   switch (cycle_user) {
 570     case SessionStateDelegate::CYCLE_TO_NEXT_USER:
 571       base::RecordAction(UserMetricsAction("Accel_Switch_To_Next_User"));
 572       break;
 573     case SessionStateDelegate::CYCLE_TO_PREVIOUS_USER:
 574       base::RecordAction(UserMetricsAction("Accel_Switch_To_Previous_User"));
 575       break;
 576   }
 577   delegate->CycleActiveUser(cycle_user);
 578   return true;
 579 }
 580
 581 bool HandleToggleMirrorMode() {
 582   base::RecordAction(UserMetricsAction("Accel_Toggle_Mirror_Mode"));
 583   Shell::GetInstance()->display_controller()->ToggleMirrorMode();
 584   return true;
 585 }
 586
 587 bool HandleToggleSpokenFeedback() {
 588   base::RecordAction(UserMetricsAction("Accel_Toggle_Spoken_Feedback"));
 589
 590   Shell::GetInstance()->accessibility_delegate()->
 591       ToggleSpokenFeedback(A11Y_NOTIFICATION_SHOW);
 592   return true;
 593 }
 594
 595 bool HandleToggleTouchViewTesting() {
 596   // TODO(skuhne): This is only temporary! Remove this!
 597   if (CommandLine::ForCurrentProcess()->HasSwitch(
 598           switches::kAshEnableTouchViewTesting)) {
 599     Shell* shell = Shell::GetInstance();
 600     shell->EnableMaximizeModeWindowManager(
 601         !shell->IsMaximizeModeWindowManagerEnabled());
 602     return true;
 603   }
 604   return false;
 605 }
 606
 607 bool HandleTouchHudClear() {
 608   RootWindowController* controller =
 609       RootWindowController::ForTargetRootWindow();
 610   if (controller->touch_hud_debug()) {
 611     controller->touch_hud_debug()->Clear();
 612     return true;
 613   }
 614   return false;
 615 }
 616
 617 bool HandleTouchHudModeChange() {
 618   RootWindowController* controller =
 619       RootWindowController::ForTargetRootWindow();
 620   if (controller->touch_hud_debug()) {
 621     controller->touch_hud_debug()->ChangeToNextMode();
 622     return true;
 623   }
 624   return false;
 625 }
 626
 627 bool HandleTouchHudProjectToggle() {
 628   base::RecordAction(UserMetricsAction("Accel_Touch_Hud_Clear"));
 629   bool enabled = Shell::GetInstance()->is_touch_hud_projection_enabled();
 630   Shell::GetInstance()->SetTouchHudProjectionEnabled(!enabled);
 631   return true;
 632 }
 633
 634 bool HandleDisableCapsLock(ui::KeyboardCode key_code,
 635                            ui::EventType previous_event_type,
 636                            ui::KeyboardCode previous_key_code) {
 637   if (previous_event_type == ui::ET_KEY_RELEASED ||
 638       (previous_key_code != ui::VKEY_LSHIFT &&
 639        previous_key_code != ui::VKEY_SHIFT &&
 640        previous_key_code != ui::VKEY_RSHIFT)) {
 641     // If something else was pressed between the Shift key being pressed
 642     // and released, then ignore the release of the Shift key.
 643     return false;
 644   }
 645   base::RecordAction(UserMetricsAction("Accel_Disable_Caps_Lock"));
 646   chromeos::input_method::InputMethodManager* ime =
 647       chromeos::input_method::InputMethodManager::Get();
 648   chromeos::input_method::ImeKeyboard* keyboard =
 649       ime ? ime->GetImeKeyboard() : NULL;
 650   if (keyboard && keyboard->CapsLockIsEnabled()) {
 651     keyboard->SetCapsLockEnabled(false);
 652     return true;
 653   }
 654   return false;
 655 }
 656
 657 bool HandleToggleCapsLock(ui::KeyboardCode key_code,
 658                           ui::EventType previous_event_type,
 659                           ui::KeyboardCode previous_key_code) {
 660   if (key_code == ui::VKEY_LWIN) {
 661     // If something else was pressed between the Search key (LWIN)
 662     // being pressed and released, then ignore the release of the
 663     // Search key.
 664     // TODO(danakj): Releasing Alt first breaks this: crbug.com/166495
 665     if (previous_event_type == ui::ET_KEY_RELEASED ||
 666         previous_key_code != ui::VKEY_LWIN)
 667       return false;
 668   }
 669   base::RecordAction(UserMetricsAction("Accel_Toggle_Caps_Lock"));
 670   chromeos::input_method::InputMethodManager* ime =
 671       chromeos::input_method::InputMethodManager::Get();
 672   chromeos::input_method::ImeKeyboard* keyboard =
 673       ime ? ime->GetImeKeyboard() : NULL;
 674   if (keyboard)
 675     keyboard->SetCapsLockEnabled(!keyboard->CapsLockIsEnabled());
 676   return true;
 677 }
 678
 679 #endif  // defined(OS_CHROMEOS)
 680
 681 // Debug print methods.
 682
 683 bool HandlePrintLayerHierarchy() {
 684   aura::Window::Windows root_windows = Shell::GetAllRootWindows();
 685   for (size_t i = 0; i < root_windows.size(); ++i) {
 686     ui::PrintLayerHierarchy(
 687         root_windows[i]->layer(),
 688         root_windows[i]->GetHost()->dispatcher()->GetLastMouseLocationInRoot());
 689   }
 690   return true;
 691 }
 692
 693 bool HandlePrintViewHierarchy() {
 694   aura::Window* active_window = ash::wm::GetActiveWindow();
 695   if (!active_window)
 696     return true;
 697   views::Widget* browser_widget =
 698       views::Widget::GetWidgetForNativeWindow(active_window);
 699   if (!browser_widget)
 700     return true;
 701   views::PrintViewHierarchy(browser_widget->GetRootView());
 702   return true;
 703 }
 704
 705 void PrintWindowHierarchy(aura::Window* window,
 706                           int indent,
 707                           std::ostringstream* out) {
 708   std::string indent_str(indent, ' ');
 709   std::string name(window->name());
 710   if (name.empty())
 711     name = "\"\"";
 712   *out << indent_str << name << " (" << window << ")"
 713        << " type=" << window->type()
 714        << (wm::IsActiveWindow(window) ? " [active] " : " ")
 715        << (window->IsVisible() ? " visible " : " ")
 716        << window->bounds().ToString()
 717        << '\n';
 718
 719   for (size_t i = 0; i < window->children().size(); ++i)
 720     PrintWindowHierarchy(window->children()[i], indent + 3, out);
 721 }
 722
 723 bool HandlePrintWindowHierarchy() {
 724   Shell::RootWindowControllerList controllers =
 725       Shell::GetAllRootWindowControllers();
 726   for (size_t i = 0; i < controllers.size(); ++i) {
 727     std::ostringstream out;
 728     out << "RootWindow " << i << ":\n";
 729     PrintWindowHierarchy(controllers[i]->GetRootWindow(), 0, &out);
 730     // Error so logs can be collected from end-users.
 731     LOG(ERROR) << out.str();
 732   }
 733   return true;
 734 }
 735
 736 bool HandlePrintUIHierarchies() {
 737   // This is a separate command so the user only has to hit one key to generate
 738   // all the logs. Developers use the individual dumps repeatedly, so keep
 739   // those as separate commands to avoid spamming their logs.
 740   HandlePrintLayerHierarchy();
 741   HandlePrintWindowHierarchy();
 742   HandlePrintViewHierarchy();
 743   return true;
 744 }
 745
 746 }  // namespace
 747
 748 ////////////////////////////////////////////////////////////////////////////////
 749 // AcceleratorControllerContext, public:
 750
 751 AcceleratorControllerContext::AcceleratorControllerContext() {
 752   current_accelerator_.set_type(ui::ET_UNKNOWN);
 753   previous_accelerator_.set_type(ui::ET_UNKNOWN);
 754 }
 755
 756 void AcceleratorControllerContext::UpdateContext(
 757     const ui::Accelerator& accelerator) {
 758   previous_accelerator_ = current_accelerator_;
 759   current_accelerator_ = accelerator;
 760 }
 761
 762 ////////////////////////////////////////////////////////////////////////////////
 763 // AcceleratorController, public:
 764
 765 AcceleratorController::AcceleratorController()
 766     : accelerator_manager_(new ui::AcceleratorManager) {
 767   Init();
 768 }
 769
 770 AcceleratorController::~AcceleratorController() {
 771 }
 772
 773 void AcceleratorController::Init() {
 774   for (size_t i = 0; i < kActionsAllowedAtLoginOrLockScreenLength; ++i) {
 775     actions_allowed_at_login_screen_.insert(
 776         kActionsAllowedAtLoginOrLockScreen[i]);
 777     actions_allowed_at_lock_screen_.insert(
 778         kActionsAllowedAtLoginOrLockScreen[i]);
 779   }
 780   for (size_t i = 0; i < kActionsAllowedAtLockScreenLength; ++i)
 781     actions_allowed_at_lock_screen_.insert(kActionsAllowedAtLockScreen[i]);
 782   for (size_t i = 0; i < kActionsAllowedAtModalWindowLength; ++i)
 783     actions_allowed_at_modal_window_.insert(kActionsAllowedAtModalWindow[i]);
 784   for (size_t i = 0; i < kReservedActionsLength; ++i)
 785     reserved_actions_.insert(kReservedActions[i]);
 786   for (size_t i = 0; i < kNonrepeatableActionsLength; ++i)
 787     nonrepeatable_actions_.insert(kNonrepeatableActions[i]);
 788   for (size_t i = 0; i < kActionsAllowedInAppModeLength; ++i)
 789     actions_allowed_in_app_mode_.insert(kActionsAllowedInAppMode[i]);
 790   for (size_t i = 0; i < kActionsNeedingWindowLength; ++i)
 791     actions_needing_window_.insert(kActionsNeedingWindow[i]);
 792
 793   RegisterAccelerators(kAcceleratorData, kAcceleratorDataLength);
 794
 795 #if !defined(NDEBUG)
 796   RegisterAccelerators(kDesktopAcceleratorData, kDesktopAcceleratorDataLength);
 797 #endif
 798
 799   if (DebugShortcutsEnabled()) {
 800     RegisterAccelerators(kDebugAcceleratorData, kDebugAcceleratorDataLength);
 801     for (size_t i = 0; i < kReservedDebugActionsLength; ++i)
 802       reserved_actions_.insert(kReservedDebugActions[i]);
 803   }
 804
 805 #if defined(OS_CHROMEOS)
 806   keyboard_brightness_control_delegate_.reset(
 807       new KeyboardBrightnessController());
 808 #endif
 809 }
 810
 811 void AcceleratorController::Register(const ui::Accelerator& accelerator,
 812                                      ui::AcceleratorTarget* target) {
 813   accelerator_manager_->Register(accelerator,
 814                                  ui::AcceleratorManager::kNormalPriority,
 815                                  target);
 816 }
 817
 818 void AcceleratorController::Unregister(const ui::Accelerator& accelerator,
 819                                        ui::AcceleratorTarget* target) {
 820   accelerator_manager_->Unregister(accelerator, target);
 821 }
 822
 823 void AcceleratorController::UnregisterAll(ui::AcceleratorTarget* target) {
 824   accelerator_manager_->UnregisterAll(target);
 825 }
 826
 827 bool AcceleratorController::Process(const ui::Accelerator& accelerator) {
 828   if (ime_control_delegate_) {
 829     return accelerator_manager_->Process(
 830         ime_control_delegate_->RemapAccelerator(accelerator));
 831   }
 832   return accelerator_manager_->Process(accelerator);
 833 }
 834
 835 bool AcceleratorController::IsRegistered(
 836     const ui::Accelerator& accelerator) const {
 837   return accelerator_manager_->GetCurrentTarget(accelerator) != NULL;
 838 }
 839
 840 bool AcceleratorController::IsReservedAccelerator(
 841     const ui::Accelerator& accelerator) const {
 842   const ui::Accelerator remapped_accelerator = ime_control_delegate_.get() ?
 843       ime_control_delegate_->RemapAccelerator(accelerator) : accelerator;
 844
 845   std::map<ui::Accelerator, int>::const_iterator iter =
 846       accelerators_.find(remapped_accelerator);
 847   if (iter == accelerators_.end())
 848     return false;  // not an accelerator.
 849
 850   return reserved_actions_.find(iter->second) != reserved_actions_.end();
 851 }
 852
 853 bool AcceleratorController::PerformAction(int action,
 854                                           const ui::Accelerator& accelerator) {
 855   ash::Shell* shell = ash::Shell::GetInstance();
 856   if (!shell->session_state_delegate()->IsActiveUserSessionStarted() &&
 857       actions_allowed_at_login_screen_.find(action) ==
 858       actions_allowed_at_login_screen_.end()) {
 859     return false;
 860   }
 861   if (shell->session_state_delegate()->IsScreenLocked() &&
 862       actions_allowed_at_lock_screen_.find(action) ==
 863       actions_allowed_at_lock_screen_.end()) {
 864     return false;
 865   }
 866   if (shell->IsSystemModalWindowOpen() &&
 867       actions_allowed_at_modal_window_.find(action) ==
 868       actions_allowed_at_modal_window_.end()) {
 869     // Note: we return true. This indicates the shortcut is handled
 870     // and will not be passed to the modal window. This is important
 871     // for things like Alt+Tab that would cause an undesired effect
 872     // in the modal window by cycling through its window elements.
 873     return true;
 874   }
 875   if (shell->delegate()->IsRunningInForcedAppMode() &&
 876       actions_allowed_in_app_mode_.find(action) ==
 877       actions_allowed_in_app_mode_.end()) {
 878     return false;
 879   }
 880   if (MruWindowTracker::BuildWindowList(false).empty() &&
 881       actions_needing_window_.find(action) != actions_needing_window_.end()) {
 882     Shell::GetInstance()->accessibility_delegate()->TriggerAccessibilityAlert(
 883         A11Y_ALERT_WINDOW_NEEDED);
 884     return true;
 885   }
 886
 887   const ui::KeyboardCode key_code = accelerator.key_code();
 888   // PerformAction() is performed from gesture controllers and passes
 889   // empty Accelerator() instance as the second argument. Such events
 890   // should never be suspended.
 891   const bool gesture_event = key_code == ui::VKEY_UNKNOWN;
 892
 893   // Ignore accelerators invoked as repeated (while holding a key for a long
 894   // time, if their handling is nonrepeatable.
 895   if (nonrepeatable_actions_.find(action) != nonrepeatable_actions_.end() &&
 896       context_.repeated() && !gesture_event) {
 897     return true;
 898   }
 899   // Type of the previous accelerator. Used by NEXT_IME and DISABLE_CAPS_LOCK.
 900   const ui::EventType previous_event_type =
 901     context_.previous_accelerator().type();
 902   const ui::KeyboardCode previous_key_code =
 903     context_.previous_accelerator().key_code();
 904
 905   // You *MUST* return true when some action is performed. Otherwise, this
 906   // function might be called *twice*, via BrowserView::PreHandleKeyboardEvent
 907   // and BrowserView::HandleKeyboardEvent, for a single accelerator press.
 908   //
 909   // If your accelerator invokes more than one line of code, please either
 910   // implement it in your module's controller code (like TOGGLE_MIRROR_MODE
 911   // below) or pull it into a HandleFoo() function above.
 912   switch (action) {
 913     case ACCESSIBLE_FOCUS_NEXT:
 914       return HandleAccessibleFocusCycle(false);
 915     case ACCESSIBLE_FOCUS_PREVIOUS:
 916       return HandleAccessibleFocusCycle(true);
 917     case CYCLE_BACKWARD_MRU:
 918       return HandleCycleBackwardMRU(accelerator);
 919     case CYCLE_FORWARD_MRU:
 920       return HandleCycleForwardMRU(accelerator);
 921     case TOGGLE_OVERVIEW:
 922       return ToggleOverview(accelerator);
 923 #if defined(OS_CHROMEOS)
 924     case ADD_REMOVE_DISPLAY:
 925       return HandleAddRemoveDisplay();
 926     case TOGGLE_MIRROR_MODE:
 927       return HandleToggleMirrorMode();
 928     case LOCK_SCREEN:
 929       return HandleLock(key_code);
 930     case OPEN_FILE_MANAGER:
 931       return HandleFileManager();
 932     case OPEN_CROSH:
 933       return HandleCrosh();
 934     case SILENCE_SPOKEN_FEEDBACK:
 935       HandleSilenceSpokenFeedback();
 936       break;
 937     case SWAP_PRIMARY_DISPLAY:
 938       return HandleSwapPrimaryDisplay();
 939     case SWITCH_TO_NEXT_USER:
 940       return HandleCycleUser(SessionStateDelegate::CYCLE_TO_NEXT_USER);
 941     case SWITCH_TO_PREVIOUS_USER:
 942       return HandleCycleUser(SessionStateDelegate::CYCLE_TO_PREVIOUS_USER);
 943     case TOGGLE_SPOKEN_FEEDBACK:
 944       return HandleToggleSpokenFeedback();
 945     case TOGGLE_TOUCH_VIEW_TESTING:
 946       return HandleToggleTouchViewTesting();
 947     case TOGGLE_WIFI:
 948       Shell::GetInstance()->system_tray_notifier()->NotifyRequestToggleWifi();
 949       return true;
 950     case TOUCH_HUD_CLEAR:
 951       return HandleTouchHudClear();
 952     case TOUCH_HUD_MODE_CHANGE:
 953       return HandleTouchHudModeChange();
 954     case TOUCH_HUD_PROJECTION_TOGGLE:
 955       return HandleTouchHudProjectToggle();
 956     case DISABLE_GPU_WATCHDOG:
 957       Shell::GetInstance()->gpu_support()->DisableGpuWatchdog();
 958       return true;
 959     case DISABLE_CAPS_LOCK:
 960       return HandleDisableCapsLock(
 961           key_code, previous_event_type, previous_key_code);
 962     case TOGGLE_CAPS_LOCK:
 963       return HandleToggleCapsLock(
 964           key_code, previous_event_type, previous_key_code);
 965 #endif  // OS_CHROMEOS
 966     case OPEN_FEEDBACK_PAGE:
 967       return HandleOpenFeedbackPage();
 968     case EXIT:
 969       // UMA metrics are recorded in the handler.
 970       exit_warning_handler_.HandleAccelerator();
 971       return true;
 972     case NEW_INCOGNITO_WINDOW:
 973       return HandleNewIncognitoWindow();
 974     case NEW_TAB:
 975       return HandleNewTab(key_code);
 976     case NEW_WINDOW:
 977       return HandleNewWindow();
 978     case RESTORE_TAB:
 979       return HandleRestoreTab();
 980     case TAKE_SCREENSHOT:
 981       return HandleTakeScreenshot(screenshot_delegate_.get());
 982     case TAKE_PARTIAL_SCREENSHOT:
 983       return HandleTakePartialScreenshot(screenshot_delegate_.get());
 984     case TOGGLE_APP_LIST:
 985       return HandleToggleAppList(
 986           key_code, previous_event_type, previous_key_code, accelerator);
 987     case BRIGHTNESS_DOWN:
 988       if (brightness_control_delegate_)
 989         return brightness_control_delegate_->HandleBrightnessDown(accelerator);
 990       break;
 991     case BRIGHTNESS_UP:
 992       if (brightness_control_delegate_)
 993         return brightness_control_delegate_->HandleBrightnessUp(accelerator);
 994       break;
 995     case KEYBOARD_BRIGHTNESS_DOWN:
 996       if (keyboard_brightness_control_delegate_)
 997         return keyboard_brightness_control_delegate_->
 998             HandleKeyboardBrightnessDown(accelerator);
 999       break;
1000     case KEYBOARD_BRIGHTNESS_UP:
1001       if (keyboard_brightness_control_delegate_)
1002         return keyboard_brightness_control_delegate_->
1003             HandleKeyboardBrightnessUp(accelerator);
1004       break;
1005     case VOLUME_MUTE: {
1006       ash::VolumeControlDelegate* volume_delegate =
1007           shell->system_tray_delegate()->GetVolumeControlDelegate();
1008       return volume_delegate && volume_delegate->HandleVolumeMute(accelerator);
1009     }
1010     case VOLUME_DOWN: {
1011       ash::VolumeControlDelegate* volume_delegate =
1012           shell->system_tray_delegate()->GetVolumeControlDelegate();
1013       return volume_delegate && volume_delegate->HandleVolumeDown(accelerator);
1014     }
1015     case VOLUME_UP: {
1016       ash::VolumeControlDelegate* volume_delegate =
1017           shell->system_tray_delegate()->GetVolumeControlDelegate();
1018       return volume_delegate && volume_delegate->HandleVolumeUp(accelerator);
1019     }
1020     case FOCUS_LAUNCHER:
1021       return HandleFocusLauncher();
1022     case FOCUS_NEXT_PANE:
1023       return HandleRotatePaneFocus(Shell::FORWARD);
1024     case FOCUS_PREVIOUS_PANE:
1025       return HandleRotatePaneFocus(Shell::BACKWARD);
1026     case SHOW_KEYBOARD_OVERLAY:
1027       return HandleShowKeyboardOverlay();
1028     case SHOW_SYSTEM_TRAY_BUBBLE:
1029       return HandleShowSystemTrayBubble();
1030     case SHOW_MESSAGE_CENTER_BUBBLE:
1031       HandleShowMessageCenterBubble();
1032       break;
1033     case SHOW_TASK_MANAGER:
1034       return HandleShowTaskManager();
1035     case NEXT_IME:
1036       return HandleNextIme(
1037           ime_control_delegate_.get(), previous_event_type, previous_key_code);
1038     case PREVIOUS_IME:
1039       return HandlePreviousIme(ime_control_delegate_.get(), accelerator);
1040     case PRINT_UI_HIERARCHIES:
1041       return HandlePrintUIHierarchies();
1042     case SWITCH_IME:
1043       return HandleSwitchIme(ime_control_delegate_.get(), accelerator);
1044     case LAUNCH_APP_0:
1045       return HandleLaunchAppN(0);
1046     case LAUNCH_APP_1:
1047       return HandleLaunchAppN(1);
1048     case LAUNCH_APP_2:
1049       return HandleLaunchAppN(2);
1050     case LAUNCH_APP_3:
1051       return HandleLaunchAppN(3);
1052     case LAUNCH_APP_4:
1053       return HandleLaunchAppN(4);
1054     case LAUNCH_APP_5:
1055       return HandleLaunchAppN(5);
1056     case LAUNCH_APP_6:
1057       return HandleLaunchAppN(6);
1058     case LAUNCH_APP_7:
1059       return HandleLaunchAppN(7);
1060     case LAUNCH_LAST_APP:
1061       return HandleLaunchLastApp();
1062     case WINDOW_SNAP_LEFT:
1063     case WINDOW_SNAP_RIGHT:
1064       return HandleWindowSnap(action);
1065     case WINDOW_MINIMIZE:
1066       return HandleWindowMinimize();
1067     case TOGGLE_FULLSCREEN:
1068       return HandleToggleFullscreen(key_code);
1069     case TOGGLE_MAXIMIZED:
1070       accelerators::ToggleMaximized();
1071       return true;
1072     case WINDOW_POSITION_CENTER:
1073      return HandlePositionCenter();
1074     case SCALE_UI_UP:
1075       return HandleScaleUI(true /* up */);
1076     case SCALE_UI_DOWN:
1077       return HandleScaleUI(false /* down */);
1078     case SCALE_UI_RESET:
1079       return HandleScaleReset();
1080     case ROTATE_WINDOW:
1081       return HandleRotateActiveWindow();
1082     case ROTATE_SCREEN:
1083       return HandleRotateScreen();
1084     case TOGGLE_DESKTOP_BACKGROUND_MODE:
1085       return debug::CycleDesktopBackgroundMode();
1086     case TOGGLE_ROOT_WINDOW_FULL_SCREEN:
1087       return HandleToggleRootWindowFullScreen();
1088     case DEBUG_TOGGLE_DEVICE_SCALE_FACTOR:
1089       Shell::GetInstance()->display_manager()->ToggleDisplayScaleFactor();
1090       return true;
1091     case DEBUG_TOGGLE_SHOW_DEBUG_BORDERS:
1092       ash::debug::ToggleShowDebugBorders();
1093       return true;
1094     case DEBUG_TOGGLE_SHOW_FPS_COUNTER:
1095       ash::debug::ToggleShowFpsCounter();
1096       return true;
1097     case DEBUG_TOGGLE_SHOW_PAINT_RECTS:
1098       ash::debug::ToggleShowPaintRects();
1099       return true;
1100     case MAGNIFY_SCREEN_ZOOM_IN:
1101       return HandleMagnifyScreen(1);
1102     case MAGNIFY_SCREEN_ZOOM_OUT:
1103       return HandleMagnifyScreen(-1);
1104     case MEDIA_NEXT_TRACK:
1105       return HandleMediaNextTrack();
1106     case MEDIA_PLAY_PAUSE:
1107        return HandleMediaPlayPause();
1108     case MEDIA_PREV_TRACK:
1109        return HandleMediaPrevTrack();
1110     case POWER_PRESSED:  // fallthrough
1111     case POWER_RELEASED:
1112 #if defined(OS_CHROMEOS)
1113       if (!base::SysInfo::IsRunningOnChromeOS()) {
1114         // There is no powerd in linux desktop, so call the
1115         // PowerButtonController here.
1116         Shell::GetInstance()->power_button_controller()->
1117             OnPowerButtonEvent(action == POWER_PRESSED, base::TimeTicks());
1118       }
1119 #endif
1120       // We don't do anything with these at present on the device,
1121       // (power button events are reported to us from powerm via
1122       // D-BUS), but we consume them to prevent them from getting
1123       // passed to apps -- see http://crbug.com/146609.
1124       return true;
1125     case LOCK_PRESSED:
1126     case LOCK_RELEASED:
1127       Shell::GetInstance()->power_button_controller()->
1128           OnLockButtonEvent(action == LOCK_PRESSED, base::TimeTicks());
1129       return true;
1130     case PRINT_LAYER_HIERARCHY:
1131       return HandlePrintLayerHierarchy();
1132     case PRINT_VIEW_HIERARCHY:
1133       return HandlePrintViewHierarchy();
1134     case PRINT_WINDOW_HIERARCHY:
1135       return HandlePrintWindowHierarchy();
1136     default:
1137       NOTREACHED() << "Unhandled action " << action;
1138   }
1139   return false;
1140 }
1141
1142 void AcceleratorController::SetBrightnessControlDelegate(
1143     scoped_ptr<BrightnessControlDelegate> brightness_control_delegate) {
1144   brightness_control_delegate_ = brightness_control_delegate.Pass();
1145 }
1146
1147 void AcceleratorController::SetImeControlDelegate(
1148     scoped_ptr<ImeControlDelegate> ime_control_delegate) {
1149   ime_control_delegate_ = ime_control_delegate.Pass();
1150 }
1151
1152 void AcceleratorController::SetScreenshotDelegate(
1153     scoped_ptr<ScreenshotDelegate> screenshot_delegate) {
1154   screenshot_delegate_ = screenshot_delegate.Pass();
1155 }
1156
1157 ////////////////////////////////////////////////////////////////////////////////
1158 // AcceleratorController, ui::AcceleratorTarget implementation:
1159
1160 bool AcceleratorController::AcceleratorPressed(
1161     const ui::Accelerator& accelerator) {
1162   std::map<ui::Accelerator, int>::const_iterator it =
1163       accelerators_.find(accelerator);
1164   DCHECK(it != accelerators_.end());
1165   return PerformAction(static_cast<AcceleratorAction>(it->second), accelerator);
1166 }
1167
1168 void AcceleratorController::RegisterAccelerators(
1169     const AcceleratorData accelerators[],
1170     size_t accelerators_length) {
1171   for (size_t i = 0; i < accelerators_length; ++i) {
1172     ui::Accelerator accelerator(accelerators[i].keycode,
1173                                 accelerators[i].modifiers);
1174     accelerator.set_type(accelerators[i].trigger_on_press ?
1175                          ui::ET_KEY_PRESSED : ui::ET_KEY_RELEASED);
1176     Register(accelerator, this);
1177     accelerators_.insert(
1178         std::make_pair(accelerator, accelerators[i].action));
1179   }
1180 }
1181
1182 void AcceleratorController::SetKeyboardBrightnessControlDelegate(
1183     scoped_ptr<KeyboardBrightnessControlDelegate>
1184     keyboard_brightness_control_delegate) {
1185   keyboard_brightness_control_delegate_ =
1186       keyboard_brightness_control_delegate.Pass();
1187 }
1188
1189 bool AcceleratorController::CanHandleAccelerators() const {
1190   return true;
1191 }
1192
1193 }  // namespace ash