Chrome OS multi-profiles backend and UI.

chrome/browser/chromeos/system/ash_system_tray_delegate.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/chromeos/system/ash_system_tray_delegate.h"
 
 #include <algorithm>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "ash/ash_switches.h"
+#include "ash/desktop_background/desktop_background_controller.h"
 #include "ash/shell.h"
 #include "ash/shell_delegate.h"
 #include "ash/shell_window_ids.h"
 #include "ash/system/audio/audio_observer.h"
 #include "ash/system/bluetooth/bluetooth_observer.h"
 #include "ash/system/brightness/brightness_observer.h"
 #include "ash/system/chromeos/network/network_observer.h"
 #include "ash/system/chromeos/network/network_tray_delegate.h"
 #include "ash/system/date/clock_observer.h"
 #include "ash/system/drive/drive_observer.h"
@@ skipping 26 matching lines @@
 #include "chrome/browser/chromeos/cros/cros_library.h"
 #include "chrome/browser/chromeos/cros/network_library.h"
 #include "chrome/browser/chromeos/drive/drive_system_service.h"
 #include "chrome/browser/chromeos/input_method/input_method_configuration.h"
 #include "chrome/browser/chromeos/input_method/input_method_manager.h"
 #include "chrome/browser/chromeos/input_method/input_method_util.h"
 #include "chrome/browser/chromeos/kiosk_mode/kiosk_mode_settings.h"
 #include "chrome/browser/chromeos/login/base_login_display_host.h"
 #include "chrome/browser/chromeos/login/help_app_launcher.h"
 #include "chrome/browser/chromeos/login/login_display_host.h"
+#include "chrome/browser/chromeos/login/login_wizard.h"
 #include "chrome/browser/chromeos/login/user.h"
 #include "chrome/browser/chromeos/login/user_manager.h"
 #include "chrome/browser/chromeos/login/wizard_controller.h"
 #include "chrome/browser/chromeos/mobile_config.h"
 #include "chrome/browser/chromeos/policy/device_cloud_policy_manager_chromeos.h"
 #include "chrome/browser/chromeos/status/data_promo_notification.h"
 #include "chrome/browser/chromeos/status/network_menu.h"
 #include "chrome/browser/chromeos/status/network_menu_icon.h"
 #include "chrome/browser/chromeos/system/timezone_settings.h"
 #include "chrome/browser/chromeos/system_key_event_listener.h"
@@ skipping 292 matching lines @@
       policy_manager->core()->store()->RemoveObserver(this);
   }
 
   // Overridden from ash::SystemTrayDelegate:
   virtual bool GetTrayVisibilityOnStartup() OVERRIDE {
     // In case of OOBE / sign in screen tray will be shown later.
     return UserManager::Get()->IsUserLoggedIn();
   }
 
   virtual const string16 GetUserDisplayName() const OVERRIDE {
-    return UserManager::Get()->GetLoggedInUser()->GetDisplayName();
+    return UserManager::Get()->GetActiveUser()->GetDisplayName();
   }
 
   virtual const std::string GetUserEmail() const OVERRIDE {
-    return UserManager::Get()->GetLoggedInUser()->display_email();
+    return UserManager::Get()->GetActiveUser()->display_email();
   }
 
   virtual const gfx::ImageSkia& GetUserImage() const OVERRIDE {
-    return UserManager::Get()->GetLoggedInUser()->image();
+    return UserManager::Get()->GetActiveUser()->image();
   }
 
   virtual ash::user::LoginStatus GetUserLoginStatus() const OVERRIDE {
     UserManager* manager = UserManager::Get();
     // At new user image screen manager->IsUserLoggedIn() would return true
     // but there's no browser session available yet so use SessionStarted().
     if (!manager->IsSessionStarted())
       return ash::user::LOGGED_IN_NONE;
     if (screen_locked_)
       return ash::user::LOGGED_IN_LOCKED;
     if (manager->IsCurrentUserOwner())
       return ash::user::LOGGED_IN_OWNER;
     if (manager->IsLoggedInAsGuest())
       return ash::user::LOGGED_IN_GUEST;
     if (manager->IsLoggedInAsDemoUser())
       return ash::user::LOGGED_IN_RETAIL_MODE;
     if (manager->IsLoggedInAsPublicAccount())
       return ash::user::LOGGED_IN_PUBLIC;
     return ash::user::LOGGED_IN_USER;
   }
 
   virtual bool IsOobeCompleted() const OVERRIDE {
     return WizardController::IsOobeCompleted();
   }
 
+  virtual void GetLoggedInUsers(ash::UserEmailList* users) OVERRIDE {
+    const UserList& logged_in_users = UserManager::Get()->GetLoggedInUsers();
+    for (UserList::const_iterator it = logged_in_users.begin();
+         it != logged_in_users.end(); ++it) {
+      const User* user = (*it);
+      users->push_back(user->email());
+    }
+  }
+
+  virtual void SwitchActiveUser(const std::string& email) OVERRIDE {
+    UserManager::Get()->SwitchActiveUser(email);
+  }
+
   virtual void ChangeProfilePicture() OVERRIDE {
     content::RecordAction(
         content::UserMetricsAction("OpenChangeProfilePictureDialog"));
     chrome::ShowSettingsSubPage(GetAppropriateBrowser(),
                                 chrome::kChangeProfilePictureSubPage);
   }
 
   virtual const std::string GetEnterpriseDomain() const OVERRIDE {
     return enterprise_domain_;
   }
@@ skipping 84 matching lines @@
          new chromeos::HelpAppLauncher(
             GetNativeWindowByStatus(GetUserLoginStatus())));
       help_app->ShowHelpTopic(chromeos::HelpAppLauncher::HELP_ENTERPRISE);
     } else {
       GURL url(google_util::StringAppendGoogleLocaleParam(
           chrome::kLearnMoreEnterpriseURL));
       chrome::ShowSingletonTab(GetAppropriateBrowser(), url);
     }
   }
 
+  virtual void ShowUserLogin() OVERRIDE {
+    if (!ash::Shell::GetInstance()->delegate()->IsMultiProfilesEnabled())
+      return;
+
+    // Only regular users could add other users to current session.
+    if (UserManager::Get()->GetActiveUser()->GetType() !=
+            User::USER_TYPE_REGULAR) {
+      return;
+    }
+
+    // TODO(nkostylev): Show some UI messages why no more users could be added
+    // to this session. http://crbug.com/230863
+    // We limit list of logged in users to 3 due to memory constraints.
+    // TODO(nkostylev): Adjust this limitation based on device capabilites.
+    // http://crbug.com/230865
+    if (UserManager::Get()->GetLoggedInUsers().size() >= 3)
+      return;
+
+    // Check whether there're regular users on the list that are not
+    // currently logged in.
+    const UserList& users = UserManager::Get()->GetUsers();
+    bool has_regular_not_logged_in_users = false;
+    for (UserList::const_iterator it = users.begin(); it != users.end(); ++it) {
+      const User* user = (*it);
+      if (user->GetType() == User::USER_TYPE_REGULAR &&
+          !user->is_logged_in()) {
+        has_regular_not_logged_in_users = true;
+        break;
+      }
+    }
+
+    // Launch sign in screen to add another user to current session.
+    if (has_regular_not_logged_in_users) {
+      ash::Shell::GetInstance()->
+          desktop_background_controller()->MoveDesktopToLockedContainer();
+      ShowLoginWizard(std::string(), gfx::Size());
+    }
+  }
+
   virtual void ShutDown() OVERRIDE {
     ash::Shell::GetInstance()->session_state_controller()->RequestShutdown();
   }
 
   virtual void SignOut() OVERRIDE {
     chrome::AttemptUserExit();
   }
 
   virtual void RequestLockScreen() OVERRIDE {
     // TODO(antrim) : additional logging for crbug/173178
@@ skipping 1009 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(SystemTrayDelegate);
 };
 
 }  // namespace
 
 ash::SystemTrayDelegate* CreateSystemTrayDelegate() {
   return new chromeos::SystemTrayDelegate();
 }
 
 }  // namespace chromeos