Made possible to lock and unlock with several logged in users.

chrome/browser/chromeos/login/screen_locker.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_SCREEN_LOCKER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_SCREEN_LOCKER_H_
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/sequenced_task_runner_helpers.h"
 #include "base/time.h"
 #include "chrome/browser/chromeos/login/help_app_launcher.h"
 #include "chrome/browser/chromeos/login/login_status_consumer.h"
 #include "chrome/browser/chromeos/login/screen_locker_delegate.h"
+#include "chrome/browser/chromeos/login/user.h"
 #include "ui/base/accelerators/accelerator.h"
 
 namespace content {
 class WebUI;
 }
 
 namespace chromeos {
 
 class Authenticator;
 class LoginFailure;
-class User;
-struct UserContext;
 
 namespace test {
 class ScreenLockerTester;
 class ScreenLockerViewsTester;
 class WebUIScreenLockerTester;
 }  // namespace test
 
 // ScreenLocker creates a ScreenLockerDelegate which will display the lock UI.
 // As well, it takes care of authenticating the user and managing a global
 // instance of itself which will be deleted when the system is unlocked.
 class ScreenLocker : public LoginStatusConsumer {
  public:
-  explicit ScreenLocker(const User& user);
+  explicit ScreenLocker(const UserList& users);
 
   // Returns the default instance if it has been created.
   static ScreenLocker* default_screen_locker() {
     return screen_locker_;
   }
 
   bool locked() const { return locked_; }
 
   // Initialize and show the screen locker.
   void Init();
 
   // LoginStatusConsumer implements:
   virtual void OnLoginFailure(const chromeos::LoginFailure& error) OVERRIDE;
   virtual void OnLoginSuccess(const UserContext& user_context,
                               bool pending_requests,
                               bool using_oauth) OVERRIDE;
 
   // Does actual unlocking once authentication is successful and all blocking
   // animations are done.
   void UnlockOnLoginSuccess();
 
-  // Authenticates the user with given |password| and authenticator.
-  void Authenticate(const string16& password);
+  // Authenticates the user with given |user_context|.
+  void Authenticate(const UserContext& user_context);
+
+  // Authenticates the only user with given |password|.
+  // Works only if there is only one logged in user in system.
+  // DEPRECATED: used only by tests.
+  void AuthenticateByPassword(const std::string& password);
 
   // Close message bubble to clear error messages.
   void ClearErrors();
 
   // (Re)enable input field.
   void EnableInput();
 
   // Exit the chrome, which will sign out the current session.
   void Signout();
 
   // Disables all UI needed and shows error bubble with |message|.
   // If |sign_out_only| is true then all other input except "Sign Out"
   // button is blocked.
   void ShowErrorMessage(int error_msg_id,
                         HelpAppLauncher::HelpTopic help_topic_id,
                         bool sign_out_only);
 
   // Returns the screen locker's delegate.
   ScreenLockerDelegate* delegate() const { return delegate_.get(); }
 
-  // Returns the user to authenticate.
-  const User& user() const { return user_; }
+  // Returns the users to authenticate.
+  const UserList& users() const { return users_; }
 
   // Allow a LoginStatusConsumer to listen for
   // the same login events that ScreenLocker does.
   void SetLoginStatusConsumer(chromeos::LoginStatusConsumer* consumer);
 
   // Returns WebUI associated with screen locker implementation or NULL if
   // there isn't one.
   content::WebUI* GetAssociatedWebUI();
 
   // Initialize ScreenLocker class. It will listen to
@@ skipping 27 matching lines @@
 
   // Sets the authenticator.
   void SetAuthenticator(Authenticator* authenticator);
 
   // Called when the screen lock is ready.
   void ScreenLockReady();
 
   // Called when screen locker is safe to delete.
   static void ScheduleDeletion();
 
+  // Returns true if |username| is found among logged in users.
+  bool IsUserLoggedIn(const std::string& username);
+
   // ScreenLockerDelegate instance in use.
   scoped_ptr<ScreenLockerDelegate> delegate_;
 
-  // Logged in user.
-  const User& user_;
+  // Logged in users. First user in list is active user.
+  const UserList& users_;
 
   // Used to authenticate the user to unlock.
   scoped_refptr<Authenticator> authenticator_;
 
-  // Unlock the screen when it detects key/mouse event without asking
-  // password. True when chrome is in BWSI or auto login mode.
-  bool unlock_on_input_;
-
   // True if the screen is locked, or false otherwise.  This changes
   // from false to true, but will never change from true to
   // false. Instead, ScreenLocker object gets deleted when unlocked.
   bool locked_;
 
   // Reference to the single instance of the screen locker object.
   // This is used to make sure there is only one screen locker instance.
   static ScreenLocker* screen_locker_;
 
   // The time when the screen locker object is created.
@@ skipping 13 matching lines @@
   scoped_ptr<AuthenticationParametersCapture> authentication_capture_;
 
   base::WeakPtrFactory<ScreenLocker> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ScreenLocker);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREEN_LOCKER_H_