| // Copyright 2018 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CHROME_BROWSER_RESOURCE_COORDINATOR_LIFECYCLE_UNIT_OBSERVER_H_ |
| #define CHROME_BROWSER_RESOURCE_COORDINATOR_LIFECYCLE_UNIT_OBSERVER_H_ |
| |
| #include "chrome/browser/resource_coordinator/lifecycle_unit_state.mojom-forward.h" |
| #include "content/public/browser/visibility.h" |
| |
| namespace resource_coordinator { |
| |
| using ::mojom::LifecycleUnitState; |
| using ::mojom::LifecycleUnitStateChangeReason; |
| |
| class LifecycleUnit; |
| |
| // Interface to be notified when the state of a LifecycleUnit changes. |
| class LifecycleUnitObserver { |
| public: |
| virtual ~LifecycleUnitObserver(); |
| |
| // Invoked when the state of the observed LifecycleUnit changes. |
| virtual void OnLifecycleUnitStateChanged( |
| LifecycleUnit* lifecycle_unit, |
| LifecycleUnitState last_state, |
| LifecycleUnitStateChangeReason reason); |
| |
| // Invoked when the visibility of the observed LifecyleUnit changes. |
| virtual void OnLifecycleUnitVisibilityChanged(LifecycleUnit* lifecycle_unit, |
| content::Visibility visibility); |
| |
| // Invoked before the observed LifecycleUnit starts being destroyed (i.e. |
| // |lifecycle_unit| is still valid when this is invoked). |
| virtual void OnLifecycleUnitDestroyed(LifecycleUnit* lifecycle_unit); |
| }; |
| |
| } // namespace resource_coordinator |
| |
| #endif // CHROME_BROWSER_RESOURCE_COORDINATOR_LIFECYCLE_UNIT_OBSERVER_H_ |