Chrome OS multi-profiles backend and UI.

chrome/browser/chromeos/login/user_manager_impl.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_USER_MANAGER_IMPL_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_USER_MANAGER_IMPL_H_
 
 #include <map>
 #include <string>
 
@@ skipping 28 matching lines @@
       public ProfileSyncServiceObserver,
       public content::NotificationObserver,
       public policy::DeviceLocalAccountPolicyService::Observer {
  public:
   virtual ~UserManagerImpl();
 
   // UserManager implementation:
   virtual void Shutdown() OVERRIDE;
   virtual UserImageManager* GetUserImageManager() OVERRIDE;
   virtual const UserList& GetUsers() const OVERRIDE;
+  virtual const UserList& GetLoggedInUsers() const OVERRIDE;
   virtual void UserLoggedIn(const std::string& email,
                             const std::string& username_hash,
                             bool browser_restart) OVERRIDE;
+  virtual void SwitchActiveUser(const std::string& email) OVERRIDE;
   virtual void RetailModeUserLoggedIn() OVERRIDE;
   virtual void GuestUserLoggedIn() OVERRIDE;
   virtual void KioskAppLoggedIn(const std::string& username) OVERRIDE;
   virtual void LocallyManagedUserLoggedIn(const std::string& username) OVERRIDE;
   virtual void PublicAccountUserLoggedIn(User* user) OVERRIDE;
   virtual void RegularUserLoggedIn(const std::string& email,
                                    bool browser_restart) OVERRIDE;
   virtual void RegularUserLoggedInAsEphemeral(
       const std::string& email) OVERRIDE;
   virtual void SessionStarted() OVERRIDE;
   virtual void RemoveUser(const std::string& email,
                           RemoveUserDelegate* delegate) OVERRIDE;
   virtual void RemoveUserFromList(const std::string& email) OVERRIDE;
   virtual bool IsKnownUser(const std::string& email) const OVERRIDE;
   virtual const User* FindUser(const std::string& email) const OVERRIDE;
   virtual const User* FindLocallyManagedUser(
       const string16& display_name) const OVERRIDE;
   virtual const User* GetLoggedInUser() const OVERRIDE;
   virtual User* GetLoggedInUser() OVERRIDE;
+  virtual const User* GetActiveUser() const OVERRIDE;
+  virtual User* GetActiveUser() OVERRIDE;
   virtual void SaveUserOAuthStatus(
       const std::string& username,
       User::OAuthTokenStatus oauth_token_status) OVERRIDE;
   virtual void SaveUserDisplayName(const std::string& username,
                                    const string16& display_name) OVERRIDE;
   virtual string16 GetUserDisplayName(
       const std::string& username) const OVERRIDE;
   virtual void SaveUserDisplayEmail(const std::string& username,
                                     const std::string& display_email) OVERRIDE;
   virtual std::string GetUserDisplayEmail(
@@ skipping 69 matching lines @@
   void RetrieveTrustedDevicePolicies();
 
   // Returns true if trusted device policies have successfully been retrieved
   // and ephemeral users are enabled.
   bool AreEphemeralUsersEnabled() const;
 
   // Returns the user with the given email address if found in the persistent
   // list. Returns |NULL| otherwise.
   const User* FindUserInList(const std::string& email) const;
 
-  // Notifies that new user session has started.
+  // Notifies that user has logged in.
+  // Sends NOTIFICATION_LOGIN_USER_CHANGED notification.
   void NotifyOnLogin();
 
   // Reads user's oauth token status from local state preferences.
   User::OAuthTokenStatus LoadUserOAuthStatus(const std::string& username) const;
 
   void SetCurrentUserIsOwner(bool is_current_user_owner);
 
   // Updates current user ownership on UI thread.
   void UpdateOwnership(DeviceSettingsService::OwnershipStatus status,
                        bool is_owner);
@@ skipping 43 matching lines @@
   policy::DeviceLocalAccountPolicyService* device_local_account_policy_service_;
 
   // True if users have been loaded from prefs already.
   bool users_loaded_;
 
   // List of all known users. User instances are owned by |this|. Regular users
   // are removed by |RemoveUserFromList|, public accounts by
   // |UpdateAndCleanUpPublicAccounts|.
   UserList users_;
 
-  // The logged-in user. NULL until a user has logged in, then points to one
+  // List of all users that are logged in current session. These point to User
+  // instances in |users_|. Only one of them could be marked as active.
+  UserList logged_in_users_;
+
+  // The logged-in user that is currently active in current session.
+  // NULL until a user has logged in, then points to one
   // of the User instances in |users_|, the |guest_user_| instance or an
   // ephemeral user instance.
-  User* logged_in_user_;
+  User* active_user_;

[Dmitry Polukhin, 2013/04/11 13:34:15]

FYI, perhaps we will need to switch to linked_ptr instead of plain pointers. Now
when we can add/removes active users we need to simplify memory management.

[Nikita (slow), 2013/04/12 15:41:25]

I'll do that in a separate CL as I've looked over places where it has to be
changed and it will inflate scope of this CL.

Filed http://crbug.com/230852

 
   // True if SessionStarted() has been called.
   bool session_started_;
 
   // Cached flag of whether currently logged-in user is owner or not.
   // May be accessed on different threads, requires locking.
   bool is_current_user_owner_;
   mutable base::Lock is_current_user_owner_lock_;
 
   // Cached flag of whether the currently logged-in user existed before this
@@ skipping 45 matching lines @@
 
   // Specific flows by user e-mail.
   FlowMap specific_flows_;
 
   DISALLOW_COPY_AND_ASSIGN(UserManagerImpl);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_USER_MANAGER_IMPL_H_