| // Copyright 2017 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_LOCK_SCREEN_ACTION_LOCK_SCREEN_NOTE_LAUNCHER_H_ |
| #define ASH_LOCK_SCREEN_ACTION_LOCK_SCREEN_NOTE_LAUNCHER_H_ |
| |
| #include "ash/ash_export.h" |
| #include "ash/tray_action/tray_action_observer.h" |
| #include "base/callback.h" |
| #include "base/macros.h" |
| #include "base/scoped_observer.h" |
| |
| namespace ash { |
| |
| class TrayAction; |
| |
| // A helper class for requesting a lock screen app that provides a callback run |
| // when the action launch process finishes (both successfuly or with a failure). |
| class ASH_EXPORT LockScreenNoteLauncher : public TrayActionObserver { |
| public: |
| using LaunchCallback = base::OnceCallback<void(bool success)>; |
| |
| LockScreenNoteLauncher(); |
| ~LockScreenNoteLauncher() override; |
| |
| // Whether the lock screen note state indicates that a note action launch can |
| // be requested - note that |Run| will not succeed if this returns false. |
| static bool CanAttemptLaunch(); |
| |
| // Requests a lock screen note launch, and starts observing lock screen note |
| // state changes - when the state changes to a non-launching state (either |
| // kActive - indicating launch success, or kAvailable or kNotAvailable - |
| // indicating launch failure), it runs |callback|. |
| // This can handle only one launch requests at a time - i.e. it should not be |
| // called again before |callback| is run. |
| // Returns whether the note launch was successfully requested. |callback| will |
| // not be called if the return value is false. |
| bool Run(mojom::LockScreenNoteOrigin action_origin, LaunchCallback callback); |
| |
| // TrayActionObserver: |
| void OnLockScreenNoteStateChanged(mojom::TrayActionState state) override; |
| |
| private: |
| // Called when the launch attempt completes - resets the object state and runs |
| // the launch callback provided to |Run|. |
| void OnLaunchDone(bool success); |
| |
| // The callback provided to |Run|. |
| LaunchCallback callback_; |
| |
| ScopedObserver<TrayAction, TrayActionObserver> tray_action_observer_; |
| |
| DISALLOW_COPY_AND_ASSIGN(LockScreenNoteLauncher); |
| }; |
| |
| } // namespace ash |
| |
| #endif // ASH_LOCK_SCREEN_ACTION_LOCK_SCREEN_NOTE_LAUNCHER_H_ |