blob: 4992788fadaaaf43a1acee1f43ba697a344cbaff [file] [log] [blame]
// Copyright 2014 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.
#include <memory>
#include "base/callback_list.h"
#include "base/macros.h"
#include "services/device/public/mojom/battery_status.mojom.h"
namespace base {
class SingleThreadTaskRunner;
namespace device {
class BatteryStatusManager;
class BatteryStatusService {
typedef base::Callback<void(const mojom::BatteryStatus&)>
typedef base::CallbackList<void(const mojom::BatteryStatus&)>
typedef BatteryUpdateCallbackList::Subscription BatteryUpdateSubscription;
// Returns the BatteryStatusService singleton.
static BatteryStatusService* GetInstance();
// NOTE: These must be public due to internal stashing of the global
// BatteryStatusService object in an std::unique_ptr. Clients should use only
// the static GetInstance() method above.
virtual ~BatteryStatusService();
// Adds a callback to receive battery status updates. Must be called on the
// main thread. The callback itself will be called on the main thread as well.
// NOTE: The callback may be run before AddCallback returns!
std::unique_ptr<BatteryUpdateSubscription> AddCallback(
const BatteryUpdateCallback& callback);
// Gracefully clean-up.
void Shutdown();
// Injects a custom battery status manager for testing purposes.
void SetBatteryManagerForTesting(
std::unique_ptr<BatteryStatusManager> test_battery_manager);
// Returns callback to invoke when battery is changed. Used for testing.
const BatteryUpdateCallback& GetUpdateCallbackForTesting() const;
friend class BatteryStatusServiceTest;
// Updates current battery status and sends new status to interested
// render processes. Can be called on any thread via a callback.
void NotifyConsumers(const mojom::BatteryStatus& status);
void NotifyConsumersOnMainThread(const mojom::BatteryStatus& status);
void ConsumersChanged();
scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_;
std::unique_ptr<BatteryStatusManager> battery_fetcher_;
BatteryUpdateCallbackList callback_list_;
BatteryUpdateCallback update_callback_;
mojom::BatteryStatus status_;
bool status_updated_;
bool is_shutdown_;
} // namespace device