src/ash/wm/lock_state_controller.cc

   1 // Copyright 2013 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/wm/lock_state_controller.h"
   6
   7 #include <algorithm>
   8
   9 #include "ash/accessibility_delegate.h"
  10 #include "ash/ash_switches.h"
  11 #include "ash/cancel_mode.h"
  12 #include "ash/metrics/user_metrics_recorder.h"
  13 #include "ash/shell.h"
  14 #include "ash/shell_delegate.h"
  15 #include "ash/shell_window_ids.h"
  16 #include "ash/wm/session_state_animator.h"
  17 #include "base/bind_helpers.h"
  18 #include "base/command_line.h"
  19 #include "base/strings/string_util.h"
  20 #include "base/timer/timer.h"
  21 #include "ui/aura/window_tree_host.h"
  22 #include "ui/compositor/layer_animation_sequence.h"
  23 #include "ui/compositor/scoped_layer_animation_settings.h"
  24 #include "ui/views/controls/menu/menu_controller.h"
  25 #include "ui/wm/core/compound_event_filter.h"
  26
  27 #if defined(OS_CHROMEOS)
  28 #include "base/sys_info.h"
  29 #include "media/audio/sounds/sounds_manager.h"
  30 #endif
  31
  32 #if defined(OS_CHROMEOS)
  33 using media::SoundsManager;
  34 #endif
  35
  36 namespace ash {
  37
  38 namespace {
  39
  40 #if defined(OS_CHROMEOS)
  41 const int kMaxShutdownSoundDurationMs = 1500;
  42 #endif
  43
  44 aura::Window* GetBackground() {
  45   aura::Window* root_window = Shell::GetPrimaryRootWindow();
  46   return Shell::GetContainer(root_window,
  47                              kShellWindowId_DesktopBackgroundContainer);
  48 }
  49
  50 bool IsBackgroundHidden() {
  51   return !GetBackground()->IsVisible();
  52 }
  53
  54 void ShowBackground() {
  55   ui::ScopedLayerAnimationSettings settings(
  56       GetBackground()->layer()->GetAnimator());
  57   settings.SetTransitionDuration(base::TimeDelta());
  58   GetBackground()->Show();
  59 }
  60
  61 void HideBackground() {
  62   ui::ScopedLayerAnimationSettings settings(
  63       GetBackground()->layer()->GetAnimator());
  64   settings.SetTransitionDuration(base::TimeDelta());
  65   GetBackground()->Hide();
  66 }
  67
  68 // This observer is intended to use in cases when some action has to be taken
  69 // once some animation successfully completes (i.e. it was not aborted).
  70 // Observer will count a number of sequences it is attached to, and a number of
  71 // finished sequences (either Ended or Aborted). Once these two numbers are
  72 // equal, observer will delete itself, calling callback passed to constructor if
  73 // there were no aborted animations.
  74 // This way it can be either used to wait for some animation to be finished in
  75 // multiple layers, to wait once a sequence of animations is finished in one
  76 // layer or the mixture of both.
  77 class AnimationFinishedObserver : public ui::LayerAnimationObserver {
  78  public:
  79   explicit AnimationFinishedObserver(base::Closure &callback)
  80       : callback_(callback),
  81         sequences_attached_(0),
  82         sequences_completed_(0),
  83         paused_(false) {
  84   }
  85
  86   // Pauses observer: no checks will be made while paused. It can be used when
  87   // a sequence has some immediate animations in the beginning, and for
  88   // animations that can be tested with flag that makes all animations
  89   // immediate.
  90   void Pause() {
  91     paused_ = true;
  92   }
  93
  94   // Unpauses observer. It does a check and calls callback if conditions are
  95   // met.
  96   void Unpause() {
  97     if (!paused_)
  98       return;
  99     paused_ = false;
 100     if (sequences_completed_ == sequences_attached_) {
 101       callback_.Run();
 102       delete this;
 103     }
 104   }
 105
 106  private:
 107   virtual ~AnimationFinishedObserver() {
 108   }
 109
 110   // LayerAnimationObserver implementation
 111   virtual void OnLayerAnimationEnded(
 112       ui::LayerAnimationSequence* sequence) OVERRIDE {
 113     sequences_completed_++;
 114     if ((sequences_completed_ == sequences_attached_) && !paused_) {
 115       callback_.Run();
 116       delete this;
 117     }
 118   }
 119
 120   virtual void OnLayerAnimationAborted(
 121       ui::LayerAnimationSequence* sequence) OVERRIDE {
 122     sequences_completed_++;
 123     if ((sequences_completed_ == sequences_attached_) && !paused_)
 124       delete this;
 125   }
 126
 127   virtual void OnLayerAnimationScheduled(
 128       ui::LayerAnimationSequence* sequence) OVERRIDE {
 129   }
 130
 131   virtual void OnAttachedToSequence(
 132       ui::LayerAnimationSequence* sequence) OVERRIDE {
 133     LayerAnimationObserver::OnAttachedToSequence(sequence);
 134     sequences_attached_++;
 135   }
 136
 137   // Callback to be called.
 138   base::Closure callback_;
 139
 140   // Number of sequences this observer was attached to.
 141   int sequences_attached_;
 142
 143   // Number of sequences either ended or aborted.
 144   int sequences_completed_;
 145
 146   bool paused_;
 147
 148   DISALLOW_COPY_AND_ASSIGN(AnimationFinishedObserver);
 149 };
 150
 151 }  // namespace
 152
 153 const int LockStateController::kLockTimeoutMs = 400;
 154 const int LockStateController::kShutdownTimeoutMs = 400;
 155 const int LockStateController::kLockFailTimeoutMs = 8000;
 156 const int LockStateController::kLockToShutdownTimeoutMs = 150;
 157 const int LockStateController::kShutdownRequestDelayMs = 50;
 158
 159 LockStateController::TestApi::TestApi(LockStateController* controller)
 160     : controller_(controller) {
 161 }
 162
 163 LockStateController::TestApi::~TestApi() {
 164 }
 165
 166 LockStateController::LockStateController()
 167     : animator_(new SessionStateAnimator()),
 168       login_status_(user::LOGGED_IN_NONE),
 169       system_is_locked_(false),
 170       shutting_down_(false),
 171       shutdown_after_lock_(false),
 172       animating_lock_(false),
 173       can_cancel_lock_animation_(false),
 174       weak_ptr_factory_(this) {
 175   Shell::GetPrimaryRootWindow()->GetHost()->AddObserver(this);
 176 }
 177
 178 LockStateController::~LockStateController() {
 179   Shell::GetPrimaryRootWindow()->GetHost()->RemoveObserver(this);
 180 }
 181
 182 void LockStateController::SetDelegate(LockStateControllerDelegate* delegate) {
 183   delegate_.reset(delegate);
 184 }
 185
 186 void LockStateController::AddObserver(LockStateObserver* observer) {
 187   observers_.AddObserver(observer);
 188 }
 189
 190 void LockStateController::RemoveObserver(LockStateObserver* observer) {
 191   observers_.RemoveObserver(observer);
 192 }
 193
 194 bool LockStateController::HasObserver(LockStateObserver* observer) {
 195   return observers_.HasObserver(observer);
 196 }
 197
 198 void LockStateController::StartLockAnimation(
 199     bool shutdown_after_lock) {
 200   if (animating_lock_)
 201     return;
 202   shutdown_after_lock_ = shutdown_after_lock;
 203   can_cancel_lock_animation_ = true;
 204
 205   StartCancellablePreLockAnimation();
 206 }
 207
 208 void LockStateController::StartShutdownAnimation() {
 209   StartCancellableShutdownAnimation();
 210 }
 211
 212 void LockStateController::StartLockAnimationAndLockImmediately() {
 213   if (animating_lock_)
 214     return;
 215   StartImmediatePreLockAnimation(true /* request_lock_on_completion */);
 216 }
 217
 218 bool LockStateController::LockRequested() {
 219   return lock_fail_timer_.IsRunning();
 220 }
 221
 222 bool LockStateController::ShutdownRequested() {
 223   return shutting_down_;
 224 }
 225
 226 bool LockStateController::CanCancelLockAnimation() {
 227   return can_cancel_lock_animation_;
 228 }
 229
 230 void LockStateController::CancelLockAnimation() {
 231   if (!CanCancelLockAnimation())
 232     return;
 233   shutdown_after_lock_ = false;
 234   animating_lock_ = false;
 235   CancelPreLockAnimation();
 236 }
 237
 238 bool LockStateController::CanCancelShutdownAnimation() {
 239   return pre_shutdown_timer_.IsRunning() ||
 240          shutdown_after_lock_ ||
 241          lock_to_shutdown_timer_.IsRunning();
 242 }
 243
 244 void LockStateController::CancelShutdownAnimation() {
 245   if (!CanCancelShutdownAnimation())
 246     return;
 247   if (lock_to_shutdown_timer_.IsRunning()) {
 248     lock_to_shutdown_timer_.Stop();
 249     return;
 250   }
 251   if (shutdown_after_lock_) {
 252     shutdown_after_lock_ = false;
 253     return;
 254   }
 255
 256   animator_->StartGlobalAnimation(
 257       SessionStateAnimator::ANIMATION_UNDO_GRAYSCALE_BRIGHTNESS,
 258       SessionStateAnimator::ANIMATION_SPEED_REVERT_SHUTDOWN);
 259   pre_shutdown_timer_.Stop();
 260 }
 261
 262 void LockStateController::OnStartingLock() {
 263   if (shutting_down_ || system_is_locked_)
 264     return;
 265   if (animating_lock_)
 266     return;
 267   StartImmediatePreLockAnimation(false /* request_lock_on_completion */);
 268 }
 269
 270 void LockStateController::RequestShutdown() {
 271   if (shutting_down_)
 272     return;
 273
 274   shutting_down_ = true;
 275
 276   Shell* shell = ash::Shell::GetInstance();
 277   shell->cursor_manager()->HideCursor();
 278   shell->cursor_manager()->LockCursor();
 279
 280   animator_->StartGlobalAnimation(
 281       SessionStateAnimator::ANIMATION_GRAYSCALE_BRIGHTNESS,
 282       SessionStateAnimator::ANIMATION_SPEED_SHUTDOWN);
 283   StartRealShutdownTimer(true);
 284 }
 285
 286 void LockStateController::OnLockScreenHide(
 287   base::Callback<void(void)>& callback) {
 288   StartUnlockAnimationBeforeUIDestroyed(callback);
 289 }
 290
 291 void LockStateController::SetLockScreenDisplayedCallback(
 292     const base::Closure& callback) {
 293   lock_screen_displayed_callback_ = callback;
 294 }
 295
 296 void LockStateController::OnHostCloseRequested(
 297     const aura::WindowTreeHost* host) {
 298   Shell::GetInstance()->delegate()->Exit();
 299 }
 300
 301 void LockStateController::OnLoginStateChanged(
 302     user::LoginStatus status) {
 303   if (status != user::LOGGED_IN_LOCKED)
 304     login_status_ = status;
 305   system_is_locked_ = (status == user::LOGGED_IN_LOCKED);
 306 }
 307
 308 void LockStateController::OnAppTerminating() {
 309   // If we hear that Chrome is exiting but didn't request it ourselves, all we
 310   // can really hope for is that we'll have time to clear the screen.
 311   // This is also the case when the user signs off.
 312   if (!shutting_down_) {
 313     shutting_down_ = true;
 314     Shell* shell = ash::Shell::GetInstance();
 315     shell->cursor_manager()->HideCursor();
 316     shell->cursor_manager()->LockCursor();
 317     animator_->StartAnimation(SessionStateAnimator::kAllContainersMask,
 318                               SessionStateAnimator::ANIMATION_HIDE_IMMEDIATELY,
 319                               SessionStateAnimator::ANIMATION_SPEED_IMMEDIATE);
 320   }
 321 }
 322
 323 void LockStateController::OnLockStateChanged(bool locked) {
 324   VLOG(1) << "OnLockStateChanged " << locked;
 325   if (shutting_down_ || (system_is_locked_ == locked))
 326     return;
 327
 328   system_is_locked_ = locked;
 329
 330   if (locked) {
 331     StartPostLockAnimation();
 332     lock_fail_timer_.Stop();
 333   } else {
 334     StartUnlockAnimationAfterUIDestroyed();
 335   }
 336 }
 337
 338 void LockStateController::OnLockFailTimeout() {
 339   DCHECK(!system_is_locked_);
 340   CHECK(false) << "We can not be sure about the lock state. Crash and let the "
 341                << "SessionManager end the session";
 342 }
 343
 344 void LockStateController::StartLockToShutdownTimer() {
 345   shutdown_after_lock_ = false;
 346   lock_to_shutdown_timer_.Stop();
 347   lock_to_shutdown_timer_.Start(
 348       FROM_HERE,
 349       base::TimeDelta::FromMilliseconds(kLockToShutdownTimeoutMs),
 350       this, &LockStateController::OnLockToShutdownTimeout);
 351 }
 352
 353 void LockStateController::OnLockToShutdownTimeout() {
 354   DCHECK(system_is_locked_);
 355   StartCancellableShutdownAnimation();
 356 }
 357
 358 void LockStateController::StartPreShutdownAnimationTimer() {
 359   pre_shutdown_timer_.Stop();
 360   pre_shutdown_timer_.Start(
 361       FROM_HERE,
 362       animator_->GetDuration(SessionStateAnimator::ANIMATION_SPEED_SHUTDOWN),
 363       this,
 364       &LockStateController::OnPreShutdownAnimationTimeout);
 365 }
 366
 367 void LockStateController::OnPreShutdownAnimationTimeout() {
 368   VLOG(1) << "OnPreShutdownAnimationTimeout";
 369   shutting_down_ = true;
 370
 371   Shell* shell = ash::Shell::GetInstance();
 372   shell->cursor_manager()->HideCursor();
 373
 374   StartRealShutdownTimer(false);
 375 }
 376
 377 void LockStateController::StartRealShutdownTimer(bool with_animation_time) {
 378   base::TimeDelta duration =
 379       base::TimeDelta::FromMilliseconds(kShutdownRequestDelayMs);
 380   if (with_animation_time) {
 381     duration +=
 382         animator_->GetDuration(SessionStateAnimator::ANIMATION_SPEED_SHUTDOWN);
 383   }
 384
 385 #if defined(OS_CHROMEOS)
 386   const AccessibilityDelegate* const delegate =
 387       Shell::GetInstance()->accessibility_delegate();
 388   base::TimeDelta sound_duration = delegate->PlayShutdownSound();
 389   sound_duration =
 390       std::min(sound_duration,
 391                base::TimeDelta::FromMilliseconds(kMaxShutdownSoundDurationMs));
 392   duration = std::max(duration, sound_duration);
 393 #endif
 394
 395   real_shutdown_timer_.Start(
 396       FROM_HERE, duration, this, &LockStateController::OnRealShutdownTimeout);
 397 }
 398
 399 void LockStateController::OnRealShutdownTimeout() {
 400   VLOG(1) << "OnRealShutdownTimeout";
 401   DCHECK(shutting_down_);
 402 #if defined(OS_CHROMEOS)
 403   if (!base::SysInfo::IsRunningOnChromeOS()) {
 404     ShellDelegate* delegate = Shell::GetInstance()->delegate();
 405     if (delegate) {
 406       delegate->Exit();
 407       return;
 408     }
 409   }
 410 #endif
 411   Shell::GetInstance()->metrics()->RecordUserMetricsAction(
 412       UMA_ACCEL_SHUT_DOWN_POWER_BUTTON);
 413   delegate_->RequestShutdown();
 414 }
 415
 416 void LockStateController::StartCancellableShutdownAnimation() {
 417   Shell* shell = ash::Shell::GetInstance();
 418   // Hide cursor, but let it reappear if the mouse moves.
 419   shell->cursor_manager()->HideCursor();
 420
 421   animator_->StartGlobalAnimation(
 422       SessionStateAnimator::ANIMATION_GRAYSCALE_BRIGHTNESS,
 423       SessionStateAnimator::ANIMATION_SPEED_SHUTDOWN);
 424   StartPreShutdownAnimationTimer();
 425 }
 426
 427 void LockStateController::StartImmediatePreLockAnimation(
 428     bool request_lock_on_completion) {
 429   VLOG(1) << "StartImmediatePreLockAnimation " << request_lock_on_completion;
 430   animating_lock_ = true;
 431   StoreUnlockedProperties();
 432
 433   base::Closure next_animation_starter =
 434       base::Bind(&LockStateController::PreLockAnimationFinished,
 435                  weak_ptr_factory_.GetWeakPtr(),
 436                  request_lock_on_completion);
 437   AnimationFinishedObserver* observer =
 438       new AnimationFinishedObserver(next_animation_starter);
 439
 440   observer->Pause();
 441
 442   animator_->StartAnimationWithObserver(
 443       SessionStateAnimator::NON_LOCK_SCREEN_CONTAINERS,
 444       SessionStateAnimator::ANIMATION_LIFT,
 445       SessionStateAnimator::ANIMATION_SPEED_MOVE_WINDOWS,
 446       observer);
 447   animator_->StartAnimationWithObserver(
 448       SessionStateAnimator::LAUNCHER,
 449       SessionStateAnimator::ANIMATION_FADE_OUT,
 450       SessionStateAnimator::ANIMATION_SPEED_MOVE_WINDOWS,
 451       observer);
 452   // Hide the screen locker containers so we can raise them later.
 453   animator_->StartAnimation(SessionStateAnimator::LOCK_SCREEN_CONTAINERS,
 454                             SessionStateAnimator::ANIMATION_HIDE_IMMEDIATELY,
 455                             SessionStateAnimator::ANIMATION_SPEED_IMMEDIATE);
 456   AnimateBackgroundAppearanceIfNecessary(
 457       SessionStateAnimator::ANIMATION_SPEED_MOVE_WINDOWS, observer);
 458
 459   observer->Unpause();
 460
 461   DispatchCancelMode();
 462   FOR_EACH_OBSERVER(LockStateObserver, observers_,
 463       OnLockStateEvent(LockStateObserver::EVENT_LOCK_ANIMATION_STARTED));
 464 }
 465
 466 void LockStateController::StartCancellablePreLockAnimation() {
 467   animating_lock_ = true;
 468   StoreUnlockedProperties();
 469   VLOG(1) << "StartCancellablePreLockAnimation";
 470   base::Closure next_animation_starter =
 471       base::Bind(&LockStateController::PreLockAnimationFinished,
 472                  weak_ptr_factory_.GetWeakPtr(),
 473                  true /* request_lock */);
 474   AnimationFinishedObserver* observer =
 475       new AnimationFinishedObserver(next_animation_starter);
 476
 477   observer->Pause();
 478
 479   animator_->StartAnimationWithObserver(
 480       SessionStateAnimator::NON_LOCK_SCREEN_CONTAINERS,
 481       SessionStateAnimator::ANIMATION_LIFT,
 482       SessionStateAnimator::ANIMATION_SPEED_UNDOABLE,
 483       observer);
 484   animator_->StartAnimationWithObserver(
 485       SessionStateAnimator::LAUNCHER,
 486       SessionStateAnimator::ANIMATION_FADE_OUT,
 487       SessionStateAnimator::ANIMATION_SPEED_UNDOABLE,
 488       observer);
 489   // Hide the screen locker containers so we can raise them later.
 490   animator_->StartAnimation(SessionStateAnimator::LOCK_SCREEN_CONTAINERS,
 491                             SessionStateAnimator::ANIMATION_HIDE_IMMEDIATELY,
 492                             SessionStateAnimator::ANIMATION_SPEED_IMMEDIATE);
 493   AnimateBackgroundAppearanceIfNecessary(
 494       SessionStateAnimator::ANIMATION_SPEED_UNDOABLE, observer);
 495
 496   DispatchCancelMode();
 497   FOR_EACH_OBSERVER(LockStateObserver, observers_,
 498       OnLockStateEvent(LockStateObserver::EVENT_PRELOCK_ANIMATION_STARTED));
 499   observer->Unpause();
 500 }
 501
 502 void LockStateController::CancelPreLockAnimation() {
 503   VLOG(1) << "CancelPreLockAnimation";
 504   base::Closure next_animation_starter =
 505       base::Bind(&LockStateController::LockAnimationCancelled,
 506                  weak_ptr_factory_.GetWeakPtr());
 507   AnimationFinishedObserver* observer =
 508       new AnimationFinishedObserver(next_animation_starter);
 509
 510   observer->Pause();
 511
 512   animator_->StartAnimationWithObserver(
 513       SessionStateAnimator::NON_LOCK_SCREEN_CONTAINERS,
 514       SessionStateAnimator::ANIMATION_UNDO_LIFT,
 515       SessionStateAnimator::ANIMATION_SPEED_UNDO_MOVE_WINDOWS,
 516       observer);
 517   animator_->StartAnimationWithObserver(
 518       SessionStateAnimator::LAUNCHER,
 519       SessionStateAnimator::ANIMATION_FADE_IN,
 520       SessionStateAnimator::ANIMATION_SPEED_UNDO_MOVE_WINDOWS,
 521       observer);
 522   AnimateBackgroundHidingIfNecessary(
 523       SessionStateAnimator::ANIMATION_SPEED_UNDO_MOVE_WINDOWS, observer);
 524
 525   observer->Unpause();
 526 }
 527
 528 void LockStateController::StartPostLockAnimation() {
 529   VLOG(1) << "StartPostLockAnimation";
 530   base::Closure next_animation_starter =
 531       base::Bind(&LockStateController::PostLockAnimationFinished,
 532                  weak_ptr_factory_.GetWeakPtr());
 533
 534   AnimationFinishedObserver* observer =
 535       new AnimationFinishedObserver(next_animation_starter);
 536
 537   observer->Pause();
 538   animator_->StartAnimationWithObserver(
 539       SessionStateAnimator::LOCK_SCREEN_CONTAINERS,
 540       SessionStateAnimator::ANIMATION_RAISE_TO_SCREEN,
 541       SessionStateAnimator::ANIMATION_SPEED_MOVE_WINDOWS,
 542       observer);
 543   observer->Unpause();
 544 }
 545
 546 void LockStateController::StartUnlockAnimationBeforeUIDestroyed(
 547     base::Closure& callback) {
 548   VLOG(1) << "StartUnlockAnimationBeforeUIDestroyed";
 549   animator_->StartAnimationWithCallback(
 550       SessionStateAnimator::LOCK_SCREEN_CONTAINERS,
 551       SessionStateAnimator::ANIMATION_LIFT,
 552       SessionStateAnimator::ANIMATION_SPEED_MOVE_WINDOWS,
 553       callback);
 554 }
 555
 556 void LockStateController::StartUnlockAnimationAfterUIDestroyed() {
 557   VLOG(1) << "StartUnlockAnimationAfterUIDestroyed";
 558   base::Closure next_animation_starter =
 559       base::Bind(&LockStateController::UnlockAnimationAfterUIDestroyedFinished,
 560                  weak_ptr_factory_.GetWeakPtr());
 561
 562   AnimationFinishedObserver* observer =
 563       new AnimationFinishedObserver(next_animation_starter);
 564
 565   observer->Pause();
 566
 567   animator_->StartAnimationWithObserver(
 568       SessionStateAnimator::NON_LOCK_SCREEN_CONTAINERS,
 569       SessionStateAnimator::ANIMATION_DROP,
 570       SessionStateAnimator::ANIMATION_SPEED_MOVE_WINDOWS,
 571       observer);
 572   animator_->StartAnimationWithObserver(
 573       SessionStateAnimator::LAUNCHER,
 574       SessionStateAnimator::ANIMATION_FADE_IN,
 575       SessionStateAnimator::ANIMATION_SPEED_MOVE_WINDOWS,
 576       observer);
 577   AnimateBackgroundHidingIfNecessary(
 578       SessionStateAnimator::ANIMATION_SPEED_MOVE_WINDOWS, observer);
 579   observer->Unpause();
 580 }
 581
 582 void LockStateController::LockAnimationCancelled() {
 583   can_cancel_lock_animation_ = false;
 584   RestoreUnlockedProperties();
 585 }
 586
 587 void LockStateController::PreLockAnimationFinished(bool request_lock) {
 588   VLOG(1) << "PreLockAnimationFinished";
 589   can_cancel_lock_animation_ = false;
 590
 591   // Don't do anything (including starting the lock-fail timer) if the screen
 592   // was already locked while the animation was going.
 593   if (system_is_locked_) {
 594     DCHECK(!request_lock) << "Got request to lock already-locked system "
 595                           << "at completion of pre-lock animation";
 596     return;
 597   }
 598
 599   if (request_lock) {
 600     Shell::GetInstance()->metrics()->RecordUserMetricsAction(
 601         shutdown_after_lock_ ?
 602         UMA_ACCEL_LOCK_SCREEN_POWER_BUTTON :
 603         UMA_ACCEL_LOCK_SCREEN_LOCK_BUTTON);
 604     delegate_->RequestLockScreen();
 605   }
 606
 607   base::TimeDelta timeout =
 608       base::TimeDelta::FromMilliseconds(kLockFailTimeoutMs);
 609 #if defined(OS_CHROMEOS)
 610   // Increase lock timeout for slower hardware, see http://crbug.com/350628
 611   const std::string board = base::SysInfo::GetLsbReleaseBoard();
 612   if (board == "x86-mario" ||
 613       StartsWithASCII(board, "x86-alex", true /* case_sensitive */) ||
 614       StartsWithASCII(board, "x86-zgb", true /* case_sensitive */)) {
 615     timeout *= 2;
 616   }
 617 #endif
 618   lock_fail_timer_.Start(
 619       FROM_HERE, timeout, this, &LockStateController::OnLockFailTimeout);
 620 }
 621
 622 void LockStateController::PostLockAnimationFinished() {
 623   animating_lock_ = false;
 624   VLOG(1) << "PostLockAnimationFinished";
 625   FOR_EACH_OBSERVER(LockStateObserver, observers_,
 626       OnLockStateEvent(LockStateObserver::EVENT_LOCK_ANIMATION_FINISHED));
 627   if (!lock_screen_displayed_callback_.is_null()) {
 628     lock_screen_displayed_callback_.Run();
 629     lock_screen_displayed_callback_.Reset();
 630   }
 631   CHECK(!views::MenuController::GetActiveInstance());
 632   if (shutdown_after_lock_) {
 633     shutdown_after_lock_ = false;
 634     StartLockToShutdownTimer();
 635   }
 636 }
 637
 638 void LockStateController::UnlockAnimationAfterUIDestroyedFinished() {
 639   RestoreUnlockedProperties();
 640 }
 641
 642 void LockStateController::StoreUnlockedProperties() {
 643   if (!unlocked_properties_) {
 644     unlocked_properties_.reset(new UnlockedStateProperties());
 645     unlocked_properties_->background_is_hidden = IsBackgroundHidden();
 646   }
 647   if (unlocked_properties_->background_is_hidden) {
 648     // Hide background so that it can be animated later.
 649     animator_->StartAnimation(SessionStateAnimator::DESKTOP_BACKGROUND,
 650                               SessionStateAnimator::ANIMATION_HIDE_IMMEDIATELY,
 651                               SessionStateAnimator::ANIMATION_SPEED_IMMEDIATE);
 652     ShowBackground();
 653   }
 654 }
 655
 656 void LockStateController::RestoreUnlockedProperties() {
 657   if (!unlocked_properties_)
 658     return;
 659   if (unlocked_properties_->background_is_hidden) {
 660     HideBackground();
 661     // Restore background visibility.
 662     animator_->StartAnimation(SessionStateAnimator::DESKTOP_BACKGROUND,
 663                               SessionStateAnimator::ANIMATION_FADE_IN,
 664                               SessionStateAnimator::ANIMATION_SPEED_IMMEDIATE);
 665   }
 666   unlocked_properties_.reset();
 667 }
 668
 669 void LockStateController::AnimateBackgroundAppearanceIfNecessary(
 670     SessionStateAnimator::AnimationSpeed speed,
 671     ui::LayerAnimationObserver* observer) {
 672   if (unlocked_properties_.get() &&
 673       unlocked_properties_->background_is_hidden) {
 674     animator_->StartAnimationWithObserver(
 675         SessionStateAnimator::DESKTOP_BACKGROUND,
 676         SessionStateAnimator::ANIMATION_FADE_IN,
 677         speed,
 678         observer);
 679   }
 680 }
 681
 682 void LockStateController::AnimateBackgroundHidingIfNecessary(
 683     SessionStateAnimator::AnimationSpeed speed,
 684     ui::LayerAnimationObserver* observer) {
 685   if (unlocked_properties_.get() &&
 686       unlocked_properties_->background_is_hidden) {
 687     animator_->StartAnimationWithObserver(
 688         SessionStateAnimator::DESKTOP_BACKGROUND,
 689         SessionStateAnimator::ANIMATION_FADE_OUT,
 690         speed,
 691         observer);
 692   }
 693 }
 694
 695 }  // namespace ash