| // Copyright 2021 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef ASH_HUD_DISPLAY_ASH_TRACING_MANAGER_H_ |
| #define ASH_HUD_DISPLAY_ASH_TRACING_MANAGER_H_ |
| |
| #include <memory> |
| |
| #include "ash/hud_display/ash_tracing_request.h" |
| #include "ash/public/cpp/session/session_observer.h" |
| #include "base/memory/weak_ptr.h" |
| #include "base/observer_list.h" |
| #include "base/observer_list_types.h" |
| |
| namespace ash { |
| namespace hud_display { |
| |
| // Singleton object to manager Ash tracing sessions. |
| class ASH_EXPORT AshTracingManager : public SessionObserver { |
| public: |
| class Observer : public base::CheckedObserver { |
| public: |
| Observer() = default; |
| ~Observer() override = default; |
| |
| virtual void OnTracingStatusChange() = 0; |
| }; |
| |
| AshTracingManager(); |
| AshTracingManager(const AshTracingManager&) = delete; |
| AshTracingManager& operator=(const AshTracingManager&) = delete; |
| ~AshTracingManager() override; |
| |
| static AshTracingManager& Get(); |
| |
| // True when tracing is being started or stopped. No control requests are |
| // possible. |
| bool IsBusy() const; |
| |
| // True when tracing can be stopped. |
| bool IsTracingStarted() const; |
| |
| // Returns user status message. |
| std::string GetStatusMessage() const; |
| |
| // Initiates asynchronous tracing start. Observer will be notified with the |
| // result. |
| void Start(); |
| |
| // Initiates asynchronous tracing stop. Observer will be notified with the |
| // result. |
| void Stop(); |
| |
| void AddObserver(Observer* observer); |
| void RemoveObserver(Observer* observer); |
| |
| // Called by AshTracingRequest to update system state. |
| void OnRequestStatusChanged(AshTracingRequest* request); |
| |
| // SessionObserver |
| void OnFirstSessionStarted() override; |
| |
| const std::vector<std::unique_ptr<AshTracingRequest>>& |
| GetTracingRequestsForTesting() const; |
| |
| private: |
| // Returns status of the last request in tracing_requests_. |
| AshTracingRequest::Status GetLastRequestStatus() const; |
| |
| // Only last tracing request can be active. Other can be either finished, or |
| // waiting for user session start to save the trace. |
| std::vector<std::unique_ptr<AshTracingRequest>> tracing_requests_; |
| |
| base::ObserverList<Observer> observers_; |
| }; |
| |
| } // namespace hud_display |
| } // namespace ash |
| |
| #endif // ASH_HUD_DISPLAY_ASH_TRACING_MANAGER_H_ |