src/chrome/browser/ui/ash/session_state_delegate_chromeos.cc

   1 // Copyright (c) 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/session_state_delegate_chromeos.h"
   6
   7 #include "ash/multi_profile_uma.h"
   8 #include "ash/session/session_state_observer.h"
   9 #include "ash/system/chromeos/multi_user/user_switch_util.h"
  10 #include "base/bind.h"
  11 #include "base/callback.h"
  12 #include "base/command_line.h"
  13 #include "base/logging.h"
  14 #include "base/prefs/pref_service.h"
  15 #include "chrome/browser/chromeos/login/lock/screen_locker.h"
  16 #include "chrome/browser/chromeos/login/ui/user_adding_screen.h"
  17 #include "chrome/browser/chromeos/login/users/multi_profile_user_controller.h"
  18 #include "chrome/browser/chromeos/profiles/profile_helper.h"
  19 #include "chrome/browser/profiles/profile.h"
  20 #include "chrome/browser/profiles/profile_manager.h"
  21 #include "chrome/browser/ui/ash/multi_user/multi_user_window_manager.h"
  22 #include "chrome/common/pref_names.h"
  23 #include "chromeos/chromeos_switches.h"
  24 #include "chromeos/dbus/dbus_thread_manager.h"
  25 #include "chromeos/dbus/session_manager_client.h"
  26 #include "chromeos/login/login_state.h"
  27 #include "components/user_manager/user.h"
  28 #include "components/user_manager/user_manager.h"
  29 #include "google_apis/gaia/gaia_auth_util.h"
  30
  31 SessionStateDelegateChromeos::SessionStateDelegateChromeos()
  32     : session_state_(SESSION_STATE_LOGIN_PRIMARY) {
  33   user_manager::UserManager::Get()->AddSessionStateObserver(this);
  34   chromeos::UserAddingScreen::Get()->AddObserver(this);
  35
  36   // LoginState is not initialized in unit_tests.
  37   if (chromeos::LoginState::IsInitialized()) {
  38     chromeos::LoginState::Get()->AddObserver(this);
  39     SetSessionState(chromeos::LoginState::Get()->IsUserLoggedIn() ?
  40         SESSION_STATE_ACTIVE : SESSION_STATE_LOGIN_PRIMARY, true);
  41   }
  42 }
  43
  44 SessionStateDelegateChromeos::~SessionStateDelegateChromeos() {
  45   user_manager::UserManager::Get()->RemoveSessionStateObserver(this);
  46   chromeos::UserAddingScreen::Get()->RemoveObserver(this);
  47
  48   // LoginState is not initialized in unit_tests.
  49   if (chromeos::LoginState::IsInitialized())
  50     chromeos::LoginState::Get()->RemoveObserver(this);
  51 }
  52
  53 content::BrowserContext* SessionStateDelegateChromeos::GetBrowserContextByIndex(
  54     ash::MultiProfileIndex index) {
  55   DCHECK_LT(index, NumberOfLoggedInUsers());
  56   user_manager::User* user =
  57       user_manager::UserManager::Get()->GetLRULoggedInUsers()[index];
  58   CHECK(user);
  59   return chromeos::ProfileHelper::Get()->GetProfileByUserUnsafe(user);
  60 }
  61
  62 content::BrowserContext*
  63 SessionStateDelegateChromeos::GetBrowserContextForWindow(
  64     aura::Window* window) {
  65   const std::string& user_id =
  66       chrome::MultiUserWindowManager::GetInstance()->GetWindowOwner(window);
  67   const user_manager::User* user =
  68       user_manager::UserManager::Get()->FindUser(user_id);
  69   DCHECK(user);
  70   return chromeos::ProfileHelper::Get()->GetProfileByUserUnsafe(user);
  71 }
  72
  73 int SessionStateDelegateChromeos::GetMaximumNumberOfLoggedInUsers() const {
  74   // We limit list of logged in users to 10 due to memory constraints.
  75   // Note that 10 seems excessive, but we want to test how many users are
  76   // actually added to a session.
  77   // TODO(nkostylev): Adjust this limitation based on device capabilites.
  78   // http://crbug.com/230865
  79   return 10;
  80 }
  81
  82 int SessionStateDelegateChromeos::NumberOfLoggedInUsers() const {
  83   return user_manager::UserManager::Get()->GetLoggedInUsers().size();
  84 }
  85
  86 bool SessionStateDelegateChromeos::CanAddUserToMultiProfile(
  87     AddUserError* error) const {
  88   if (user_manager::UserManager::Get()
  89           ->GetUsersAllowedForMultiProfile()
  90           .size() == 0) {
  91     if (error)
  92       *error = ADD_USER_ERROR_OUT_OF_USERS;
  93     return false;
  94   }
  95   return SessionStateDelegate::CanAddUserToMultiProfile(error);
  96 }
  97
  98 bool SessionStateDelegateChromeos::IsActiveUserSessionStarted() const {
  99   return user_manager::UserManager::Get()->IsSessionStarted();
 100 }
 101
 102 bool SessionStateDelegateChromeos::CanLockScreen() const {
 103   const user_manager::UserList unlock_users =
 104       user_manager::UserManager::Get()->GetUnlockUsers();
 105   return !unlock_users.empty();
 106 }
 107
 108 bool SessionStateDelegateChromeos::IsScreenLocked() const {
 109   return chromeos::ScreenLocker::default_screen_locker() &&
 110          chromeos::ScreenLocker::default_screen_locker()->locked();
 111 }
 112
 113 bool SessionStateDelegateChromeos::ShouldLockScreenBeforeSuspending() const {
 114   const user_manager::UserList logged_in_users =
 115       user_manager::UserManager::Get()->GetLoggedInUsers();
 116   for (user_manager::UserList::const_iterator it = logged_in_users.begin();
 117        it != logged_in_users.end();
 118        ++it) {
 119     user_manager::User* user = (*it);
 120     Profile* profile =
 121         chromeos::ProfileHelper::Get()->GetProfileByUserUnsafe(user);
 122     if (profile->GetPrefs()->GetBoolean(prefs::kEnableAutoScreenLock))
 123       return true;
 124   }
 125   return false;
 126 }
 127
 128 void SessionStateDelegateChromeos::LockScreen() {
 129   if (!CanLockScreen())
 130     return;
 131
 132   VLOG(1) << "Requesting screen lock from SessionStateDelegate";
 133   chromeos::DBusThreadManager::Get()->GetSessionManagerClient()->
 134       RequestLockScreen();
 135 }
 136
 137 void SessionStateDelegateChromeos::UnlockScreen() {
 138   // This is used only for testing thus far.
 139   NOTIMPLEMENTED();
 140 }
 141
 142 bool SessionStateDelegateChromeos::IsUserSessionBlocked() const {
 143   bool has_login_manager = CommandLine::ForCurrentProcess()->HasSwitch(
 144           chromeos::switches::kLoginManager);
 145   return (has_login_manager && !IsActiveUserSessionStarted()) ||
 146          IsScreenLocked() ||
 147          chromeos::UserAddingScreen::Get()->IsRunning();
 148 }
 149
 150 ash::SessionStateDelegate::SessionState
 151 SessionStateDelegateChromeos::GetSessionState() const {
 152   return session_state_;
 153 }
 154
 155 const user_manager::UserInfo* SessionStateDelegateChromeos::GetUserInfo(
 156     ash::MultiProfileIndex index) const {
 157   DCHECK_LT(index, NumberOfLoggedInUsers());
 158   return user_manager::UserManager::Get()->GetLRULoggedInUsers()[index];
 159 }
 160
 161 const user_manager::UserInfo* SessionStateDelegateChromeos::GetUserInfo(
 162     content::BrowserContext* context) const {
 163   DCHECK(context);
 164   return chromeos::ProfileHelper::Get()->GetUserByProfile(
 165       Profile::FromBrowserContext(context));
 166 }
 167
 168 bool SessionStateDelegateChromeos::ShouldShowAvatar(
 169     aura::Window* window) const {
 170   return chrome::MultiUserWindowManager::GetInstance()->
 171       ShouldShowAvatar(window);
 172 }
 173
 174 void SessionStateDelegateChromeos::SwitchActiveUser(
 175     const std::string& user_id) {
 176   // Disallow switching to an already active user since that might crash.
 177   // Also check that we got a user id and not an email address.
 178   DCHECK_EQ(user_id,
 179             gaia::CanonicalizeEmail(gaia::SanitizeEmail(user_id)));
 180   if (user_id == user_manager::UserManager::Get()->GetActiveUser()->email())
 181     return;
 182   TryToSwitchUser(user_id);
 183 }
 184
 185 void SessionStateDelegateChromeos::CycleActiveUser(CycleUser cycle_user) {
 186   // Make sure there is a user to switch to.
 187   if (NumberOfLoggedInUsers() <= 1)
 188     return;
 189
 190   const user_manager::UserList& logged_in_users =
 191       user_manager::UserManager::Get()->GetLoggedInUsers();
 192
 193   std::string user_id =
 194       user_manager::UserManager::Get()->GetActiveUser()->email();
 195
 196   // Get an iterator positioned at the active user.
 197   user_manager::UserList::const_iterator it;
 198   for (it = logged_in_users.begin();
 199        it != logged_in_users.end(); ++it) {
 200     if ((*it)->email() == user_id)
 201       break;
 202   }
 203
 204   // Active user not found.
 205   if (it == logged_in_users.end())
 206     return;
 207
 208   // Get the user's email to select, wrapping to the start/end of the list if
 209   // necessary.
 210   switch (cycle_user) {
 211     case CYCLE_TO_NEXT_USER:
 212       if (++it == logged_in_users.end())
 213         user_id = (*logged_in_users.begin())->email();
 214       else
 215         user_id = (*it)->email();
 216       break;
 217     case CYCLE_TO_PREVIOUS_USER:
 218       if (it == logged_in_users.begin())
 219         it = logged_in_users.end();
 220       user_id = (*(--it))->email();
 221       break;
 222   }
 223
 224   // Switch using the transformed |user_id|.
 225   TryToSwitchUser(user_id);
 226 }
 227
 228 bool SessionStateDelegateChromeos::IsMultiProfileAllowedByPrimaryUserPolicy()
 229     const {
 230   return chromeos::MultiProfileUserController::GetPrimaryUserPolicy() ==
 231          chromeos::MultiProfileUserController::ALLOWED;
 232 }
 233
 234 void SessionStateDelegateChromeos::AddSessionStateObserver(
 235     ash::SessionStateObserver* observer) {
 236   session_state_observer_list_.AddObserver(observer);
 237 }
 238
 239 void SessionStateDelegateChromeos::RemoveSessionStateObserver(
 240     ash::SessionStateObserver* observer) {
 241   session_state_observer_list_.RemoveObserver(observer);
 242 }
 243
 244 void SessionStateDelegateChromeos::LoggedInStateChanged() {
 245   SetSessionState(chromeos::LoginState::Get()->IsUserLoggedIn() ?
 246       SESSION_STATE_ACTIVE : SESSION_STATE_LOGIN_PRIMARY, false);
 247 }
 248
 249 void SessionStateDelegateChromeos::ActiveUserChanged(
 250     const user_manager::User* active_user) {
 251   FOR_EACH_OBSERVER(ash::SessionStateObserver,
 252                     session_state_observer_list_,
 253                     ActiveUserChanged(active_user->email()));
 254 }
 255
 256 void SessionStateDelegateChromeos::UserAddedToSession(
 257     const user_manager::User* added_user) {
 258   FOR_EACH_OBSERVER(ash::SessionStateObserver,
 259                     session_state_observer_list_,
 260                     UserAddedToSession(added_user->email()));
 261 }
 262
 263 void SessionStateDelegateChromeos::OnUserAddingStarted() {
 264   SetSessionState(SESSION_STATE_LOGIN_SECONDARY, false);
 265 }
 266
 267 void SessionStateDelegateChromeos::OnUserAddingFinished() {
 268   SetSessionState(SESSION_STATE_ACTIVE, false);
 269 }
 270
 271 void SessionStateDelegateChromeos::SetSessionState(SessionState new_state,
 272                                                    bool force) {
 273   if (session_state_ == new_state && !force)
 274     return;
 275
 276   session_state_ = new_state;
 277   NotifySessionStateChanged();
 278 }
 279
 280 void SessionStateDelegateChromeos::NotifySessionStateChanged() {
 281   FOR_EACH_OBSERVER(ash::SessionStateObserver,
 282                     session_state_observer_list_,
 283                     SessionStateChanged(session_state_));
 284 }
 285
 286 void DoSwitchUser(const std::string& user_id) {
 287   user_manager::UserManager::Get()->SwitchActiveUser(user_id);
 288 }
 289
 290 void SessionStateDelegateChromeos::TryToSwitchUser(
 291     const std::string& user_id) {
 292   ash::TrySwitchingActiveUser(base::Bind(&DoSwitchUser, user_id));
 293 }