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// Copyright 2015 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 CONTENT_BROWSER_BACKGROUND_SYNC_BACKGROUND_SYNC_POWER_OBSERVER_H_
#define CONTENT_BROWSER_BACKGROUND_SYNC_BACKGROUND_SYNC_POWER_OBSERVER_H_
#include "base/bind.h"
#include "base/power_monitor/power_observer.h"
#include "content/browser/background_sync/background_sync.pb.h"
#include "content/common/content_export.h"
namespace content {
// BackgroundSyncPowerObserver monitors the charging status of the device and
// determines if the power conditions of BackgroundSyncRegistrations are met.
class CONTENT_EXPORT BackgroundSyncPowerObserver : public base::PowerObserver {
public:
// Creates a BackgroundSyncPowerObserver. |power_callback| is run when the
// battery states changes asynchronously via PostMessage.
explicit BackgroundSyncPowerObserver(const base::Closure& power_callback);
~BackgroundSyncPowerObserver() override;
// Returns true if the state of the battery (charging or not) meets the needs
// of |power_state|.
bool PowerSufficient(SyncPowerState power_state) const;
private:
friend class BackgroundSyncPowerObserverTest;
// PowerObserver overrides
void OnPowerStateChange(bool on_battery_power) override;
// |observing_power_monitor_| is true when the constructor is able to find and
// register an observer with the base::PowerMonitor. This should always be
// true except for tests in which the browser initialization isn't done.
bool observing_power_monitor_;
bool on_battery_;
// The callback to run when the battery state changes.
base::Closure power_changed_callback_;
DISALLOW_COPY_AND_ASSIGN(BackgroundSyncPowerObserver);
};
} // namespace content
#endif // CONTENT_BROWSER_BACKGROUND_SYNC_BACKGROUND_SYNC_POWER_OBSERVER_H_
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