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Unified Diff: ash/common/session/session_controller.h

Issue 2545723003: ash: Add SessionController/Client mojo interfaces (Closed)
Patch Set: rebase, use ash_util::GetAshServiceName Created 4 years ago
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Index: ash/common/session/session_controller.h
diff --git a/ash/common/session/session_controller.h b/ash/common/session/session_controller.h
new file mode 100644
index 0000000000000000000000000000000000000000..16a5e8b829dfcbaa35d7ad4ca567deb0ac46e718
--- /dev/null
+++ b/ash/common/session/session_controller.h
@@ -0,0 +1,129 @@
+// Copyright 2016 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_COMMON_SESSION_SESSION_CONTROLLER_H_
+#define ASH_COMMON_SESSION_SESSION_CONTROLLER_H_
+
+#include <stdint.h>
+
+#include <vector>
+
+#include "ash/ash_export.h"
+#include "ash/public/cpp/session_types.h"
+#include "ash/public/interfaces/session_controller.mojom.h"
+#include "base/macros.h"
+#include "base/observer_list.h"
+#include "mojo/public/cpp/bindings/binding_set.h"
+
+class AccountId;
+
+namespace ash {
+
+class SessionStateObserver;
+
+// Implements mojom::SessionController to cache session related info such as
+// session state, meta data about user sessions to support synchronous
+// queries for ash. It is targeted as a replacement for SessionStateDelegate.
+class ASH_EXPORT SessionController
+ : NON_EXPORTED_BASE(public mojom::SessionController) {
+ public:
+ SessionController();
+ ~SessionController() override;
+
+ // Binds the mojom::SessionControllerRequest to this object.
+ void BindRequest(mojom::SessionControllerRequest request);
+
+ // Returns the maximum possible number of logged in users.
+ int GetMaximumNumberOfLoggedInUsers() const;
+
+ // Returns the number of signed in users. If 0 is returned, there is either
+ // no session in progress or no active user.
+ int NumberOfLoggedInUsers() const;
+
+ // Gets the policy of adding a user session to ash.
+ AddUserSessionPolicy GetAddUserPolicy() const;
+
+ // 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.
+ bool IsActiveUserSessionStarted() const;
+
+ // Returns true if the screen can be locked.
+ bool CanLockScreen() const;
+
+ // Returns true if the screen is currently locked.
+ bool IsScreenLocked() const;
+
+ // Returns true if the screen should be locked automatically when the screen
+ // is turned off or the system is suspended.
+ bool ShouldLockScreenAutomatically() const;
+
+ // 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.
+ bool IsUserSessionBlocked() const;
+
+ // Gets the ash session state.
+ session_manager::SessionState GetSessionState() const;
+
+ // Gets the user sessions in LRU order with the active session being first.
+ const std::vector<mojom::UserSessionPtr>& GetUserSessions() const;
+
+ // Locks the screen. The locking happens asynchronously.
+ void LockScreen();
+
+ // Switches to another active user with |account_id| (if that user has
+ // already signed in).
+ void SwitchActiveUser(const AccountId& account_id);
+
+ // Switches the active user to the next or previous user, with the same
+ // ordering as user sessions are created.
+ void CycleActiveUser(bool next_user);
+
+ void AddSessionStateObserver(SessionStateObserver* observer);
+ void RemoveSessionStateObserver(SessionStateObserver* observer);
+
+ // mojom::SessionController
+ void SetClient(mojom::SessionControllerClientPtr client) override;
+ void SetSessionInfo(mojom::SessionInfoPtr info) override;
+ void UpdateUserSession(mojom::UserSessionPtr user_session) override;
+ void SetUserSessionOrder(
+ const std::vector<uint32_t>& user_session_order) override;
+
+ private:
+ void SetSessionState(session_manager::SessionState state);
+ void AddUserSession(mojom::UserSessionPtr user_session);
+
+ // Bindings for mojom::SessionController interface.
+ mojo::BindingSet<mojom::SessionController> bindings_;
+
+ // Client interface to session manager code (chrome).
+ mojom::SessionControllerClientPtr client_;
+
+ // Cached session info.
+ uint32_t max_users_ = 0u;
+ bool can_lock_ = false;
+ bool should_lock_screen_automatically_ = false;
+ AddUserSessionPolicy add_user_session_policy_ = AddUserSessionPolicy::ALLOWED;
+ session_manager::SessionState state_ = session_manager::SessionState::UNKNOWN;
+
+ // Cached user session info sorted by the order from SetUserSessionOrder.
+ // Currently the session manager code (chrome) sets a LRU order with the
+ // active session being the first.
+ std::vector<mojom::UserSessionPtr> user_sessions_;
+
+ // The user session id of the current active user session. User session id
+ // is managed by session manager code, starting at 1. 0u is an invalid id
+ // to detect first active user session.
+ uint32_t active_session_id_ = 0u;
+
+ base::ObserverList<ash::SessionStateObserver> observers_;
+
+ DISALLOW_COPY_AND_ASSIGN(SessionController);
+};
+
+} // namespace ash
+
+#endif // ASH_COMMON_SESSION_SESSION_CONTROLLER_H_
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