chrome/browser/ui/ash/multi_user/multi_user_window_manager_chromeos.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 "chrome/browser/ui/ash/multi_user/multi_user_window_manager_chromeos.h"
   6
   7 #include "ash/ash_switches.h"
   8 #include "ash/multi_profile_uma.h"
   9 #include "ash/root_window_controller.h"
  10 #include "ash/session/session_state_delegate.h"
  11 #include "ash/shelf/shelf.h"
  12 #include "ash/shell.h"
  13 #include "ash/shell_delegate.h"
  14 #include "ash/shell_window_ids.h"
  15 #include "ash/system/tray/system_tray_notifier.h"
  16 #include "ash/wm/maximize_mode/maximize_mode_controller.h"
  17 #include "ash/wm/window_state.h"
  18 #include "base/auto_reset.h"
  19 #include "base/message_loop/message_loop.h"
  20 #include "base/strings/string_util.h"
  21 #include "chrome/browser/browser_process.h"
  22 #include "chrome/browser/chrome_notification_types.h"
  23 #include "chrome/browser/chromeos/login/session/user_session_manager.h"
  24 #include "chrome/browser/profiles/profile.h"
  25 #include "chrome/browser/profiles/profile_manager.h"
  26 #include "chrome/browser/ui/ash/multi_user/multi_user_notification_blocker_chromeos.h"
  27 #include "chrome/browser/ui/ash/multi_user/multi_user_util.h"
  28 #include "chrome/browser/ui/ash/multi_user/user_switch_animator_chromeos.h"
  29 #include "chrome/browser/ui/browser.h"
  30 #include "chrome/browser/ui/browser_finder.h"
  31 #include "chrome/browser/ui/browser_list.h"
  32 #include "chrome/browser/ui/browser_window.h"
  33 #include "content/public/browser/notification_service.h"
  34 #include "extensions/browser/app_window/app_window.h"
  35 #include "extensions/browser/app_window/app_window_registry.h"
  36 #include "google_apis/gaia/gaia_auth_util.h"
  37 #include "ui/aura/client/aura_constants.h"
  38 #include "ui/aura/window.h"
  39 #include "ui/aura/window_event_dispatcher.h"
  40 #include "ui/base/ui_base_types.h"
  41 #include "ui/events/event.h"
  42 #include "ui/message_center/message_center.h"
  43 #include "ui/wm/core/transient_window_manager.h"
  44 #include "ui/wm/core/window_animations.h"
  45 #include "ui/wm/core/window_util.h"
  46
  47 namespace {
  48
  49 // The animation time in milliseconds for a single window which is fading
  50 // in / out.
  51 const int kAnimationTimeMS = 100;
  52
  53 // The animation time in milliseconds for the fade in and / or out when
  54 // switching users.
  55 const int kUserFadeTimeMS = 110;
  56
  57 // The animation time in ms for a window which get teleported to another screen.
  58 const int kTeleportAnimationTimeMS = 300;
  59
  60 // Checks if a given event is a user event.
  61 bool IsUserEvent(const ui::Event* e) {
  62   if (e) {
  63     ui::EventType type = e->type();
  64     if (type != ui::ET_CANCEL_MODE &&
  65         type != ui::ET_UMA_DATA &&
  66         type != ui::ET_UNKNOWN)
  67       return true;
  68   }
  69   return false;
  70 }
  71
  72 // Test if we are currently processing a user event which might lead to a
  73 // browser / app creation.
  74 bool IsProcessingUserEvent() {
  75   // When there is a nested message loop (e.g. active menu or drag and drop
  76   // operation) - we are in a nested loop and can ignore this.
  77   // Note: Unit tests might not have a message loop.
  78   base::MessageLoop* message_loop = base::MessageLoop::current();
  79   if (message_loop && message_loop->is_running() && message_loop->IsNested())
  80     return false;
  81
  82   // TODO(skuhne): "Open link in new window" will come here after the menu got
  83   // closed, executing the command from the nested menu loop. However at that
  84   // time there is no active event processed. A solution for that need to be
  85   // found past M-32. A global event handler filter (pre and post) might fix
  86   // that problem in conjunction with a depth counter - but - for the menu
  87   // execution we come here after the loop was finished (so it's not nested
  88   // anymore) and the root window should therefore still have the event which
  89   // lead to the menu invocation, but it is not. By fixing that problem this
  90   // would "magically work".
  91   aura::Window::Windows root_window_list = ash::Shell::GetAllRootWindows();
  92   for (aura::Window::Windows::iterator it = root_window_list.begin();
  93        it != root_window_list.end();
  94        ++it) {
  95     if (IsUserEvent((*it)->GetHost()->dispatcher()->current_event()))
  96       return true;
  97   }
  98   return false;
  99 }
 100
 101 // Records the type of window which was transferred to another desktop.
 102 void RecordUMAForTransferredWindowType(aura::Window* window) {
 103   // We need to figure out what kind of window this is to record the transfer.
 104   Browser* browser = chrome::FindBrowserWithWindow(window);
 105   ash::MultiProfileUMA::TeleportWindowType window_type =
 106       ash::MultiProfileUMA::TELEPORT_WINDOW_UNKNOWN;
 107   if (browser) {
 108     if (browser->profile()->IsOffTheRecord()) {
 109       window_type = ash::MultiProfileUMA::TELEPORT_WINDOW_INCOGNITO_BROWSER;
 110     } else if (browser->is_app()) {
 111       window_type = ash::MultiProfileUMA::TELEPORT_WINDOW_V1_APP;
 112     } else if (browser->is_type_popup()) {
 113       window_type = ash::MultiProfileUMA::TELEPORT_WINDOW_POPUP;
 114     } else {
 115       window_type = ash::MultiProfileUMA::TELEPORT_WINDOW_BROWSER;
 116     }
 117   } else {
 118     // Unit tests might come here without a profile manager.
 119     if (!g_browser_process->profile_manager())
 120       return;
 121     // If it is not a browser, it is probably be a V2 application. In that case
 122     // one of the AppWindowRegistry instances should know about it.
 123     extensions::AppWindow* app_window = NULL;
 124     std::vector<Profile*> profiles =
 125         g_browser_process->profile_manager()->GetLoadedProfiles();
 126     for (std::vector<Profile*>::iterator it = profiles.begin();
 127          it != profiles.end() && app_window == NULL;
 128          it++) {
 129       app_window = extensions::AppWindowRegistry::Get(*it)
 130                        ->GetAppWindowForNativeWindow(window);
 131     }
 132     if (app_window) {
 133       if (app_window->window_type() ==
 134           extensions::AppWindow::WINDOW_TYPE_PANEL ||
 135           app_window->window_type() ==
 136           extensions::AppWindow::WINDOW_TYPE_V1_PANEL) {
 137         window_type = ash::MultiProfileUMA::TELEPORT_WINDOW_PANEL;
 138       } else {
 139         window_type = ash::MultiProfileUMA::TELEPORT_WINDOW_V2_APP;
 140       }
 141     }
 142   }
 143   ash::MultiProfileUMA::RecordTeleportWindowType(window_type);
 144 }
 145
 146 }  // namespace
 147
 148 namespace chrome {
 149
 150 // A class to temporarily change the animation properties for a window.
 151 class AnimationSetter {
 152  public:
 153   AnimationSetter(aura::Window* window, int animation_time_in_ms)
 154       : window_(window),
 155         previous_animation_type_(
 156             wm::GetWindowVisibilityAnimationType(window_)),
 157         previous_animation_time_(
 158             wm::GetWindowVisibilityAnimationDuration(*window_)) {
 159     wm::SetWindowVisibilityAnimationType(
 160         window_,
 161         wm::WINDOW_VISIBILITY_ANIMATION_TYPE_FADE);
 162     wm::SetWindowVisibilityAnimationDuration(
 163         window_,
 164         base::TimeDelta::FromMilliseconds(animation_time_in_ms));
 165   }
 166
 167   ~AnimationSetter() {
 168     wm::SetWindowVisibilityAnimationType(window_,
 169                                                     previous_animation_type_);
 170     wm::SetWindowVisibilityAnimationDuration(
 171         window_,
 172         previous_animation_time_);
 173   }
 174
 175  private:
 176   // The window which gets used.
 177   aura::Window* window_;
 178
 179   // Previous animation type.
 180   const int previous_animation_type_;
 181
 182   // Previous animation time.
 183   const base::TimeDelta previous_animation_time_;
 184
 185   DISALLOW_COPY_AND_ASSIGN(AnimationSetter);
 186 };
 187
 188 // This class keeps track of all applications which were started for a user.
 189 // When an app gets created, the window will be tagged for that user. Note
 190 // that the destruction does not need to be tracked here since the universal
 191 // window observer will take care of that.
 192 class AppObserver : public extensions::AppWindowRegistry::Observer {
 193  public:
 194   explicit AppObserver(const std::string& user_id) : user_id_(user_id) {}
 195   ~AppObserver() override {}
 196
 197   // AppWindowRegistry::Observer overrides:
 198   void OnAppWindowAdded(extensions::AppWindow* app_window) override {
 199     aura::Window* window = app_window->GetNativeWindow();
 200     DCHECK(window);
 201     MultiUserWindowManagerChromeOS::GetInstance()->SetWindowOwner(window,
 202                                                                   user_id_);
 203   }
 204
 205  private:
 206   std::string user_id_;
 207
 208   DISALLOW_COPY_AND_ASSIGN(AppObserver);
 209 };
 210
 211 MultiUserWindowManagerChromeOS::MultiUserWindowManagerChromeOS(
 212     const std::string& current_user_id)
 213     : current_user_id_(current_user_id),
 214       notification_blocker_(new MultiUserNotificationBlockerChromeOS(
 215           message_center::MessageCenter::Get(), current_user_id)),
 216       suppress_visibility_changes_(false),
 217       animation_speed_(ANIMATION_SPEED_NORMAL) {
 218 }
 219
 220 MultiUserWindowManagerChromeOS::~MultiUserWindowManagerChromeOS() {
 221   // When the MultiUserWindowManager gets destroyed, ash::Shell is mostly gone.
 222   // As such we should not try to finalize any outstanding user animations.
 223   // Note that the destruction of the object can be done later.
 224   if (animation_.get())
 225     animation_->CancelAnimation();
 226
 227   // Remove all window observers.
 228   WindowToEntryMap::iterator window = window_to_entry_.begin();
 229   while (window != window_to_entry_.end()) {
 230     OnWindowDestroyed(window->first);
 231     window = window_to_entry_.begin();
 232   }
 233
 234   // Remove all app observers.
 235   UserIDToAppWindowObserver::iterator app_observer_iterator =
 236       user_id_to_app_observer_.begin();
 237   while (app_observer_iterator != user_id_to_app_observer_.end()) {
 238     Profile* profile = multi_user_util::GetProfileFromUserID(
 239         app_observer_iterator->first);
 240     DCHECK(profile);
 241     extensions::AppWindowRegistry::Get(profile)
 242         ->RemoveObserver(app_observer_iterator->second);
 243     delete app_observer_iterator->second;
 244     user_id_to_app_observer_.erase(app_observer_iterator);
 245     app_observer_iterator = user_id_to_app_observer_.begin();
 246   }
 247
 248   if (ash::Shell::HasInstance())
 249     ash::Shell::GetInstance()->session_state_delegate()->
 250         RemoveSessionStateObserver(this);
 251 }
 252
 253 void MultiUserWindowManagerChromeOS::Init() {
 254   // Since we are setting the SessionStateObserver and adding the user, this
 255   // function should get called only once.
 256   DCHECK(user_id_to_app_observer_.find(current_user_id_) ==
 257              user_id_to_app_observer_.end());
 258
 259   // Add a session state observer to be able to monitor session changes.
 260   if (ash::Shell::HasInstance()) {
 261     ash::Shell::GetInstance()->session_state_delegate()->
 262         AddSessionStateObserver(this);
 263   }
 264
 265   // The BrowserListObserver would have been better to use then the old
 266   // notification system, but that observer fires before the window got created.
 267   registrar_.Add(this, NOTIFICATION_BROWSER_WINDOW_READY,
 268                  content::NotificationService::AllSources());
 269
 270   // Add an app window observer & all already running apps.
 271   Profile* profile = multi_user_util::GetProfileFromUserID(current_user_id_);
 272   if (profile)
 273     AddUser(profile);
 274 }
 275
 276 void MultiUserWindowManagerChromeOS::SetWindowOwner(
 277     aura::Window* window,
 278     const std::string& user_id) {
 279   // Make sure the window is valid and there was no owner yet.
 280   DCHECK(window);
 281   DCHECK(!user_id.empty());
 282   if (GetWindowOwner(window) == user_id)
 283     return;
 284   DCHECK(GetWindowOwner(window).empty());
 285   window_to_entry_[window] = new WindowEntry(user_id);
 286
 287   // Remember the initial visibility of the window.
 288   window_to_entry_[window]->set_show(window->IsVisible());
 289
 290   // Add observers to track state changes.
 291   window->AddObserver(this);
 292   wm::TransientWindowManager::Get(window)->AddObserver(this);
 293
 294   // Check if this window was created due to a user interaction. If it was,
 295   // transfer it to the current user.
 296   if (IsProcessingUserEvent())
 297     window_to_entry_[window]->set_show_for_user(current_user_id_);
 298
 299   // Add all transient children to our set of windows. Note that the function
 300   // will add the children but not the owner to the transient children map.
 301   AddTransientOwnerRecursive(window, window);
 302
 303   // Notify entry adding.
 304   FOR_EACH_OBSERVER(Observer, observers_, OnOwnerEntryAdded(window));
 305
 306   if (!IsWindowOnDesktopOfUser(window, current_user_id_))
 307     SetWindowVisibility(window, false, 0);
 308 }
 309
 310 const std::string& MultiUserWindowManagerChromeOS::GetWindowOwner(
 311     aura::Window* window) const {
 312   WindowToEntryMap::const_iterator it = window_to_entry_.find(window);
 313   return it != window_to_entry_.end() ? it->second->owner()
 314                                       : base::EmptyString();
 315 }
 316
 317 void MultiUserWindowManagerChromeOS::ShowWindowForUser(
 318     aura::Window* window,
 319     const std::string& user_id) {
 320   std::string previous_owner(GetUserPresentingWindow(window));
 321   if (!ShowWindowForUserIntern(window, user_id))
 322     return;
 323   // The window switched to a new desktop and we have to switch to that desktop,
 324   // but only when it was on the visible desktop and the the target is not the
 325   // visible desktop.
 326   if (user_id == current_user_id_ || previous_owner != current_user_id_)
 327     return;
 328
 329   ash::Shell::GetInstance()->session_state_delegate()->SwitchActiveUser(
 330       user_id);
 331 }
 332
 333 bool MultiUserWindowManagerChromeOS::AreWindowsSharedAmongUsers() const {
 334   WindowToEntryMap::const_iterator it = window_to_entry_.begin();
 335   for (; it != window_to_entry_.end(); ++it) {
 336     if (it->second->owner() != it->second->show_for_user())
 337       return true;
 338   }
 339   return false;
 340 }
 341
 342 void MultiUserWindowManagerChromeOS::GetOwnersOfVisibleWindows(
 343     std::set<std::string>* user_ids) const {
 344   for (WindowToEntryMap::const_iterator it = window_to_entry_.begin();
 345        it != window_to_entry_.end();
 346        ++it) {
 347     if (it->first->IsVisible())
 348       user_ids->insert(it->second->owner());
 349   }
 350 }
 351
 352 bool MultiUserWindowManagerChromeOS::IsWindowOnDesktopOfUser(
 353     aura::Window* window,
 354     const std::string& user_id) const {
 355   const std::string& presenting_user = GetUserPresentingWindow(window);
 356   return presenting_user.empty() || presenting_user == user_id;
 357 }
 358
 359 const std::string& MultiUserWindowManagerChromeOS::GetUserPresentingWindow(
 360     aura::Window* window) const {
 361   WindowToEntryMap::const_iterator it = window_to_entry_.find(window);
 362   // If the window is not owned by anyone it is shown on all desktops and we
 363   // return the empty string.
 364   if (it == window_to_entry_.end())
 365     return base::EmptyString();
 366   // Otherwise we ask the object for its desktop.
 367   return it->second->show_for_user();
 368 }
 369
 370 void MultiUserWindowManagerChromeOS::AddUser(content::BrowserContext* context) {
 371   Profile* profile = Profile::FromBrowserContext(context);
 372   const std::string& user_id = multi_user_util::GetUserIDFromProfile(profile);
 373   if (user_id_to_app_observer_.find(user_id) != user_id_to_app_observer_.end())
 374     return;
 375
 376   user_id_to_app_observer_[user_id] = new AppObserver(user_id);
 377   extensions::AppWindowRegistry::Get(profile)
 378       ->AddObserver(user_id_to_app_observer_[user_id]);
 379
 380   // Account all existing application windows of this user accordingly.
 381   const extensions::AppWindowRegistry::AppWindowList& app_windows =
 382       extensions::AppWindowRegistry::Get(profile)->app_windows();
 383   extensions::AppWindowRegistry::AppWindowList::const_iterator it =
 384       app_windows.begin();
 385   for (; it != app_windows.end(); ++it)
 386     user_id_to_app_observer_[user_id]->OnAppWindowAdded(*it);
 387
 388   // Account all existing browser windows of this user accordingly.
 389   BrowserList* browser_list = BrowserList::GetInstance(HOST_DESKTOP_TYPE_ASH);
 390   BrowserList::const_iterator browser_it = browser_list->begin();
 391   for (; browser_it != browser_list->end(); ++browser_it) {
 392     if ((*browser_it)->profile()->GetOriginalProfile() == profile)
 393       AddBrowserWindow(*browser_it);
 394   }
 395   // When adding another user to the session, we auto switch users.
 396   if (user_id_to_app_observer_.size() == 1)
 397     return;
 398
 399   // Don't do anything special in case of user session restore after crash.
 400   // In that case session restore process will automatically switch to the
 401   // last active user session after whole process is complete.
 402   if (!chromeos::UserSessionManager::GetInstance()->
 403       UserSessionsRestoreInProgress()) {
 404     // Immediately hide the windows of the current user.
 405     base::AutoReset<AnimationSpeed> animation_speed(&animation_speed_,
 406                                                     ANIMATION_SPEED_DISABLED);
 407     ActiveUserChanged(user_id);
 408   }
 409 }
 410
 411 void MultiUserWindowManagerChromeOS::AddObserver(Observer* observer) {
 412   observers_.AddObserver(observer);
 413 }
 414
 415 void MultiUserWindowManagerChromeOS::RemoveObserver(Observer* observer) {
 416   observers_.RemoveObserver(observer);
 417 }
 418
 419 void MultiUserWindowManagerChromeOS::ActiveUserChanged(
 420     const std::string& user_id) {
 421   // This needs to be set before the animation starts.
 422   current_user_id_ = user_id;
 423
 424   animation_.reset(
 425       new UserSwitchAnimatorChromeOS(
 426           this, user_id, GetAdjustedAnimationTimeInMS(kUserFadeTimeMS)));
 427   // Call notifier here instead of observing ActiveUserChanged because
 428   // this must happen after MultiUserWindowManagerChromeOS is notified.
 429   ash::Shell::GetInstance()
 430       ->system_tray_notifier()
 431       ->NotifyMediaCaptureChanged();
 432 }
 433
 434 void MultiUserWindowManagerChromeOS::OnWindowDestroyed(aura::Window* window) {
 435   if (GetWindowOwner(window).empty()) {
 436     // This must be a window in the transient chain - remove it and its
 437     // children from the owner.
 438     RemoveTransientOwnerRecursive(window);
 439     return;
 440   }
 441   wm::TransientWindowManager::Get(window)->RemoveObserver(this);
 442   // Remove the window from the owners list.
 443   delete window_to_entry_[window];
 444   window_to_entry_.erase(window);
 445
 446   // Notify entry change.
 447   FOR_EACH_OBSERVER(Observer, observers_, OnOwnerEntryRemoved(window));
 448 }
 449
 450 void MultiUserWindowManagerChromeOS::OnWindowVisibilityChanging(
 451     aura::Window* window, bool visible) {
 452   // This command gets called first and immediately when show or hide gets
 453   // called. We remember here the desired state for restoration IF we were
 454   // not ourselves issuing the call.
 455   // Note also that using the OnWindowVisibilityChanged callback cannot be
 456   // used for this.
 457   if (suppress_visibility_changes_)
 458     return;
 459
 460   WindowToEntryMap::iterator it = window_to_entry_.find(window);
 461   // If the window is not owned by anyone it is shown on all desktops.
 462   if (it != window_to_entry_.end()) {
 463     // Remember what was asked for so that we can restore this when the user's
 464     // desktop gets restored.
 465     it->second->set_show(visible);
 466   } else {
 467     TransientWindowToVisibility::iterator it =
 468         transient_window_to_visibility_.find(window);
 469     if (it != transient_window_to_visibility_.end())
 470       it->second = visible;
 471   }
 472 }
 473
 474 void MultiUserWindowManagerChromeOS::OnWindowVisibilityChanged(
 475     aura::Window* window, bool visible) {
 476   if (suppress_visibility_changes_)
 477     return;
 478
 479   // Don't allow to make the window visible if it shouldn't be.
 480   if (visible && !IsWindowOnDesktopOfUser(window, current_user_id_)) {
 481     SetWindowVisibility(window, false, 0);
 482     return;
 483   }
 484   aura::Window* owned_parent = GetOwningWindowInTransientChain(window);
 485   if (owned_parent && owned_parent != window && visible &&
 486       !IsWindowOnDesktopOfUser(owned_parent, current_user_id_))
 487     SetWindowVisibility(window, false, 0);
 488 }
 489
 490 void MultiUserWindowManagerChromeOS::OnTransientChildAdded(
 491     aura::Window* window,
 492     aura::Window* transient_window) {
 493   if (!GetWindowOwner(window).empty()) {
 494     AddTransientOwnerRecursive(transient_window, window);
 495     return;
 496   }
 497   aura::Window* owned_parent =
 498       GetOwningWindowInTransientChain(transient_window);
 499   if (!owned_parent)
 500     return;
 501
 502   AddTransientOwnerRecursive(transient_window, owned_parent);
 503 }
 504
 505 void MultiUserWindowManagerChromeOS::OnTransientChildRemoved(
 506     aura::Window* window,
 507     aura::Window* transient_window) {
 508   // Remove the transient child if the window itself is owned, or one of the
 509   // windows in its transient parents chain.
 510   if (!GetWindowOwner(window).empty() ||
 511       GetOwningWindowInTransientChain(window))
 512     RemoveTransientOwnerRecursive(transient_window);
 513 }
 514
 515 void MultiUserWindowManagerChromeOS::Observe(
 516     int type,
 517     const content::NotificationSource& source,
 518     const content::NotificationDetails& details) {
 519   if (type == NOTIFICATION_BROWSER_WINDOW_READY)
 520     AddBrowserWindow(content::Source<Browser>(source).ptr());
 521 }
 522
 523 void MultiUserWindowManagerChromeOS::SetAnimationSpeedForTest(
 524     MultiUserWindowManagerChromeOS::AnimationSpeed speed) {
 525   animation_speed_ = speed;
 526 }
 527
 528 bool MultiUserWindowManagerChromeOS::IsAnimationRunningForTest() {
 529   return animation_.get() != NULL && !animation_->IsAnimationFinished();
 530 }
 531
 532 const std::string& MultiUserWindowManagerChromeOS::GetCurrentUserForTest()
 533     const {
 534   return current_user_id_;
 535 }
 536
 537 bool MultiUserWindowManagerChromeOS::ShowWindowForUserIntern(
 538     aura::Window* window,
 539     const std::string& user_id) {
 540   // If there is either no owner, or the owner is the current user, no action
 541   // is required.
 542   const std::string& owner = GetWindowOwner(window);
 543   if (owner.empty() ||
 544       (owner == user_id && IsWindowOnDesktopOfUser(window, user_id)))
 545     return false;
 546
 547   bool minimized = ash::wm::GetWindowState(window)->IsMinimized();
 548   // Check that we are not trying to transfer ownership of a minimized window.
 549   if (user_id != owner && minimized)
 550     return false;
 551
 552   if (minimized) {
 553     // If it is minimized it falls back to the original desktop.
 554     ash::MultiProfileUMA::RecordTeleportAction(
 555         ash::MultiProfileUMA::TELEPORT_WINDOW_RETURN_BY_MINIMIZE);
 556   } else {
 557     // If the window was transferred without getting minimized, we should record
 558     // the window type.
 559     RecordUMAForTransferredWindowType(window);
 560   }
 561
 562   WindowToEntryMap::iterator it = window_to_entry_.find(window);
 563   it->second->set_show_for_user(user_id);
 564
 565   // Show the window if the added user is the current one.
 566   if (user_id == current_user_id_) {
 567     // Only show the window if it should be shown according to its state.
 568     if (it->second->show())
 569       SetWindowVisibility(window, true, kTeleportAnimationTimeMS);
 570   } else {
 571     SetWindowVisibility(window, false, kTeleportAnimationTimeMS);
 572   }
 573
 574   // Notify entry change.
 575   FOR_EACH_OBSERVER(Observer, observers_, OnOwnerEntryChanged(window));
 576   return true;
 577 }
 578
 579 void MultiUserWindowManagerChromeOS::SetWindowVisibility(
 580     aura::Window* window, bool visible, int animation_time_in_ms) {
 581   if (window->IsVisible() == visible)
 582     return;
 583
 584   // Hiding a system modal dialog should not be allowed. Instead we switch to
 585   // the user which is showing the system modal window.
 586   // Note that in some cases (e.g. unit test) windows might not have a root
 587   // window.
 588   if (!visible && window->GetRootWindow()) {
 589     // Get the system modal container for the window's root window.
 590     aura::Window* system_modal_container =
 591         window->GetRootWindow()->GetChildById(
 592             ash::kShellWindowId_SystemModalContainer);
 593     if (window->parent() == system_modal_container) {
 594       // The window is system modal and we need to find the parent which owns
 595       // it so that we can switch to the desktop accordingly.
 596       std::string user_id = GetUserPresentingWindow(window);
 597       if (user_id.empty()) {
 598         aura::Window* owning_window = GetOwningWindowInTransientChain(window);
 599         DCHECK(owning_window);
 600         user_id = GetUserPresentingWindow(owning_window);
 601         DCHECK(!user_id.empty());
 602       }
 603       ash::Shell::GetInstance()->session_state_delegate()->SwitchActiveUser(
 604           user_id);
 605       return;
 606     }
 607   }
 608
 609   // To avoid that these commands are recorded as any other commands, we are
 610   // suppressing any window entry changes while this is going on.
 611   base::AutoReset<bool> suppressor(&suppress_visibility_changes_, true);
 612
 613   if (visible) {
 614     ShowWithTransientChildrenRecursive(window, animation_time_in_ms);
 615   } else {
 616     if (window->HasFocus())
 617       window->Blur();
 618     SetWindowVisible(window, false, animation_time_in_ms);
 619   }
 620 }
 621
 622 void MultiUserWindowManagerChromeOS::AddBrowserWindow(Browser* browser) {
 623   // A unit test (e.g. CrashRestoreComplexTest.RestoreSessionForThreeUsers) can
 624   // come here with no valid window.
 625   if (!browser->window() || !browser->window()->GetNativeWindow())
 626     return;
 627   SetWindowOwner(browser->window()->GetNativeWindow(),
 628                  multi_user_util::GetUserIDFromProfile(browser->profile()));
 629 }
 630
 631 void MultiUserWindowManagerChromeOS::ShowWithTransientChildrenRecursive(
 632     aura::Window* window, int animation_time_in_ms) {
 633   aura::Window::Windows::const_iterator it =
 634       wm::GetTransientChildren(window).begin();
 635   for (; it != wm::GetTransientChildren(window).end(); ++it)
 636     ShowWithTransientChildrenRecursive(*it, animation_time_in_ms);
 637
 638   // We show all children which were not explicitly hidden.
 639   TransientWindowToVisibility::iterator it2 =
 640       transient_window_to_visibility_.find(window);
 641   if (it2 == transient_window_to_visibility_.end() || it2->second)
 642     SetWindowVisible(window, true, animation_time_in_ms);
 643 }
 644
 645 aura::Window* MultiUserWindowManagerChromeOS::GetOwningWindowInTransientChain(
 646     aura::Window* window) const {
 647   if (!GetWindowOwner(window).empty())
 648     return NULL;
 649   aura::Window* parent = wm::GetTransientParent(window);
 650   while (parent) {
 651     if (!GetWindowOwner(parent).empty())
 652       return parent;
 653     parent = wm::GetTransientParent(parent);
 654   }
 655   return NULL;
 656 }
 657
 658 void MultiUserWindowManagerChromeOS::AddTransientOwnerRecursive(
 659     aura::Window* window,
 660     aura::Window* owned_parent) {
 661   // First add all child windows.
 662   aura::Window::Windows::const_iterator it =
 663       wm::GetTransientChildren(window).begin();
 664   for (; it != wm::GetTransientChildren(window).end(); ++it)
 665     AddTransientOwnerRecursive(*it, owned_parent);
 666
 667   // If this window is the owned window, we do not have to handle it again.
 668   if (window == owned_parent)
 669     return;
 670
 671   // Remember the current visibility.
 672   DCHECK(transient_window_to_visibility_.find(window) ==
 673              transient_window_to_visibility_.end());
 674   transient_window_to_visibility_[window] = window->IsVisible();
 675
 676   // Add observers to track state changes.
 677   window->AddObserver(this);
 678   wm::TransientWindowManager::Get(window)->AddObserver(this);
 679
 680   // Hide the window if it should not be shown. Note that this hide operation
 681   // will hide recursively this and all children - but we have already collected
 682   // their initial view state.
 683   if (!IsWindowOnDesktopOfUser(owned_parent, current_user_id_))
 684     SetWindowVisibility(window, false, kAnimationTimeMS);
 685 }
 686
 687 void MultiUserWindowManagerChromeOS::RemoveTransientOwnerRecursive(
 688     aura::Window* window) {
 689   // First remove all child windows.
 690   aura::Window::Windows::const_iterator it =
 691       wm::GetTransientChildren(window).begin();
 692   for (; it != wm::GetTransientChildren(window).end(); ++it)
 693     RemoveTransientOwnerRecursive(*it);
 694
 695   // Find from transient window storage the visibility for the given window,
 696   // set the visibility accordingly and delete the window from the map.
 697   TransientWindowToVisibility::iterator visibility_item =
 698       transient_window_to_visibility_.find(window);
 699   DCHECK(visibility_item != transient_window_to_visibility_.end());
 700
 701   window->RemoveObserver(this);
 702   wm::TransientWindowManager::Get(window)->RemoveObserver(this);
 703
 704   bool unowned_view_state = visibility_item->second;
 705   transient_window_to_visibility_.erase(visibility_item);
 706   if (unowned_view_state && !window->IsVisible()) {
 707     // To prevent these commands from being recorded as any other commands, we
 708     // are suppressing any window entry changes while this is going on.
 709     // Instead of calling SetWindowVisible, only show gets called here since all
 710     // dependents have been shown previously already.
 711     base::AutoReset<bool> suppressor(&suppress_visibility_changes_, true);
 712     window->Show();
 713   }
 714 }
 715
 716 void MultiUserWindowManagerChromeOS::SetWindowVisible(
 717     aura::Window* window,
 718     bool visible,
 719     int animation_time_in_ms) {
 720   // The MaximizeModeWindowManager will not handle invisible windows since they
 721   // are not user activatable. Since invisible windows are not being tracked,
 722   // we tell it to maximize / track this window now before it gets shown, to
 723   // reduce animation jank from multiple resizes.
 724   if (visible)
 725     ash::Shell::GetInstance()->maximize_mode_controller()->AddWindow(window);
 726
 727   AnimationSetter animation_setter(
 728       window,
 729       GetAdjustedAnimationTimeInMS(animation_time_in_ms));
 730
 731   if (visible)
 732     window->Show();
 733   else
 734     window->Hide();
 735
 736   // Make sure that animations have no influence on the window state after the
 737   // call.
 738   DCHECK_EQ(visible, window->IsVisible());
 739 }
 740
 741 int MultiUserWindowManagerChromeOS::GetAdjustedAnimationTimeInMS(
 742     int default_time_in_ms) const {
 743   return animation_speed_ == ANIMATION_SPEED_NORMAL ? default_time_in_ms :
 744       (animation_speed_ == ANIMATION_SPEED_FAST ? 10 : 0);
 745 }
 746
 747 }  // namespace chrome