[go: nahoru, domu]

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// 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_