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 #ifndef ASH_SESSION_STATE_DELEGATE_H_ 6 #define ASH_SESSION_STATE_DELEGATE_H_ 7 8 #include <string> 9 #include <vector> 10 11 #include "ash/ash_export.h" 12 #include "base/strings/string16.h" 13 14 namespace gfx { 15 class ImageSkia; 16 } // namespace gfx 17 18 namespace ash { 19 20 class SessionStateObserver; 21 22 // The index for the multi-profile item to use. The list is always LRU sorted 23 // So that the index #0 is the currently active user. 24 typedef int MultiProfileIndex; 25 26 // A list of user_id. 27 typedef std::vector<std::string> UserIdList; 28 29 // Delegate for checking and modifying the session state. 30 class ASH_EXPORT SessionStateDelegate { 31 public: 32 virtual ~SessionStateDelegate() {}; 33 34 // Returns the maximum possible number of logged in users. 35 virtual int GetMaximumNumberOfLoggedInUsers() const = 0; 36 37 // Returns the number of signed in users. If 0 is returned, there is either 38 // no session in progress or no active user. 39 virtual int NumberOfLoggedInUsers() const = 0; 40 41 // Returns |true| if the session has been fully started for the active user. 42 // When a user becomes active, the profile and browser UI are not immediately 43 // available. Only once this method starts returning |true| is the browser 44 // startup complete and both profile and UI are fully available. 45 virtual bool IsActiveUserSessionStarted() const = 0; 46 47 // Returns true if the screen can be locked. 48 virtual bool CanLockScreen() const = 0; 49 50 // Returns true if the screen is currently locked. 51 virtual bool IsScreenLocked() const = 0; 52 53 // Locks the screen. The locking happens asynchronously. 54 virtual void LockScreen() = 0; 55 56 // Unlocks the screen. 57 virtual void UnlockScreen() = 0; 58 59 // Returns |true| if user session blocked by some overlying UI. It can be 60 // login screen, lock screen or screen for adding users into multi-profile 61 // session. 62 virtual bool IsUserSessionBlocked() const = 0; 63 64 // Gets the displayed name for the user with the given |index|. 65 // Note that |index| can at maximum be |NumberOfLoggedInUsers() - 1|. 66 virtual const base::string16 GetUserDisplayName( 67 MultiProfileIndex index) const = 0; 68 69 // Gets the email address for the user with the given |index|. 70 // Note that |index| can at maximum be |NumberOfLoggedInUsers() - 1|. 71 virtual const std::string GetUserEmail(MultiProfileIndex index) const = 0; 72 73 // Gets the avatar image for the user with the given |index|. 74 // Note that |index| can at maximum be |NumberOfLoggedInUsers() - 1|. 75 virtual const gfx::ImageSkia& GetUserImage(MultiProfileIndex index) const = 0; 76 77 // Returns a list of all logged in users. 78 virtual void GetLoggedInUsers(UserIdList* users) = 0; 79 80 // Switches to another active user (if that user has already signed in). 81 virtual void SwitchActiveUser(const std::string& user_id) = 0; 82 83 // Adds or removes sessions state observer. 84 virtual void AddSessionStateObserver(SessionStateObserver* observer) = 0; 85 virtual void RemoveSessionStateObserver(SessionStateObserver* observer) = 0; 86 }; 87 88 } // namespace ash 89 90 #endif // ASH_SESSION_STATE_DELEGATE_H_ 91
