Revert 267158 "CleanUp: Introduce UserInfo. Move session_state s..."

trunk/src/ash/session/session_state_delegate.h

-// Copyright (c) 2013 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 ASH_SESSION_SESSION_STATE_DELEGATE_H_
-#define ASH_SESSION_SESSION_STATE_DELEGATE_H_
-
-#include <string>
-#include <vector>
-
-#include "ash/ash_export.h"
-#include "base/strings/string16.h"
-
-namespace aura {
-class Window;
-}  // namespace aura
-
-namespace content {
-class BrowserContext;
-}
-
-namespace gfx {
-class ImageSkia;
-}  // namespace gfx
-
-namespace ash {
-
-class SessionStateObserver;
-class UserInfo;
-
-// The index for the multi-profile item to use. The list is always LRU sorted
-// So that the index #0 is the currently active user.
-typedef int MultiProfileIndex;
-
-// A list of user_id.
-typedef std::vector<std::string> UserIdList;
-
-// Delegate for checking and modifying the session state.
-// TODO(oshima): Replace MultiProfileIndex with BrowsreContext, bacause
-// GetUserXXX are useful for non multi profile scenario in ash_shell.
-class ASH_EXPORT SessionStateDelegate {
- public:
-  // Defines the cycle direction for |CycleActiveUser|.
-  enum CycleUser {
-    CYCLE_TO_NEXT_USER = 0,  // Cycle to the next user.
-    CYCLE_TO_PREVIOUS_USER,  // Cycle to the previous user.
-  };
-
-  // Defines session state i.e. whether session is running or not and
-  // whether user session is blocked by things like multi-profile login.
-  enum SessionState {
-    // When primary user login UI is shown i.e. after boot or sign out,
-    // no active user session exists yet.
-    SESSION_STATE_LOGIN_PRIMARY = 0,
-
-    // Inside user session (including lock screen),
-    // no login UI (primary or multi-profiles) is shown.
-    SESSION_STATE_ACTIVE,
-
-    // When secondary user login UI is shown i.e. other users are
-    // already logged in and is currently adding another user to the session.
-    SESSION_STATE_LOGIN_SECONDARY,
-  };
-
-  virtual ~SessionStateDelegate() {};
-
-  // Returns the browser context for the user given by |index|.
-  virtual content::BrowserContext* GetBrowserContextByIndex(
-      MultiProfileIndex index) = 0;
-
-  // Returns the browser context associated with the window.
-  virtual content::BrowserContext* GetBrowserContextForWindow(
-      aura::Window* window) = 0;
-
-  // Returns the maximum possible number of logged in users.
-  virtual int GetMaximumNumberOfLoggedInUsers() const = 0;
-
-  // Returns the number of signed in users. If 0 is returned, there is either
-  // no session in progress or no active user.
-  virtual int NumberOfLoggedInUsers() const = 0;
-
-  // Returns |true| if the session has been fully started for the active user.
-  // When a user becomes active, the profile and browser UI are not immediately
-  // available. Only once this method starts returning |true| is the browser
-  // startup complete and both profile and UI are fully available.
-  virtual bool IsActiveUserSessionStarted() const = 0;
-
-  // Returns true if the screen can be locked.
-  virtual bool CanLockScreen() const = 0;
-
-  // Returns true if the screen is currently locked.
-  virtual bool IsScreenLocked() const = 0;
-
-  // Returns true if the screen should be locked when the system is about to
-  // suspend.
-  virtual bool ShouldLockScreenBeforeSuspending() const = 0;
-
-  // Locks the screen. The locking happens asynchronously.
-  virtual void LockScreen() = 0;
-
-  // Unlocks the screen.
-  virtual void UnlockScreen() = 0;
-
-  // Returns |true| if user session blocked by some overlying UI. It can be
-  // login screen, lock screen or screen for adding users into multi-profile
-  // session.
-  virtual bool IsUserSessionBlocked() const = 0;
-
-  // Returns current session state.
-  virtual SessionState GetSessionState() const = 0;
-
-  // TODO(oshima): consolidate these two GetUserInfo.
-
-  // Gets the user info for the user with the given |index|.
-  // Note that |index| can at maximum be |NumberOfLoggedInUsers() - 1|.
-  virtual const UserInfo* GetUserInfo(MultiProfileIndex index) const = 0;
-
-  // Gets the avatar image for the user associated with the |context|.
-  virtual const UserInfo* GetUserInfo(
-      content::BrowserContext* context) const = 0;
-
-  // Whether or not the window's title should show the avatar.
-  virtual bool ShouldShowAvatar(aura::Window* window) const = 0;
-
-  // Switches to another active user with |user_id|
-  // (if that user has already signed in).
-  virtual void SwitchActiveUser(const std::string& user_id) = 0;
-
-  // Switches the active user to the next or previous user, with the same
-  // ordering as GetLoggedInUsers.
-  virtual void CycleActiveUser(CycleUser cycle_user) = 0;
-
-  // Adds or removes sessions state observer.
-  virtual void AddSessionStateObserver(SessionStateObserver* observer) = 0;
-  virtual void RemoveSessionStateObserver(SessionStateObserver* observer) = 0;
-};
-
-}  // namespace ash
-
-#endif  // ASH_SESSION_SESSION_STATE_DELEGATE_H_