blob: 3b8a7bb36ce6d95c779233ecba601b14c03b71c3 [file] [log] [blame]
// Copyright 2018 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 "base/callback.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "device/bluetooth/bluetooth_adapter.h"
#include "ui/events/devices/input_device.h"
namespace ash {
// This class observes the bluetooth devices and sends out notification when
// bluetooth device changes. It's used as a supplementary to the class
// ui::InputDeviceEventObserver as InputDeviceEventObserver does not have
// knowledge about bluetooth device status thus does not send notifications of
// bluetooth device changes.
class BluetoothDevicesObserver : public device::BluetoothAdapter::Observer {
// Note |device| can be nullptr here if only the bluetooth adapter status
// changes.
using AdapterOrDeviceChangedCallback =
base::RepeatingCallback<void(device::BluetoothDevice* device)>;
explicit BluetoothDevicesObserver(
const AdapterOrDeviceChangedCallback& device_changed_callback);
~BluetoothDevicesObserver() override;
// device::BluetoothAdapter::Observer:
void AdapterPresentChanged(device::BluetoothAdapter* adapter,
bool present) override;
void AdapterPoweredChanged(device::BluetoothAdapter* adapter,
bool powered) override;
void DeviceChanged(device::BluetoothAdapter* adapter,
device::BluetoothDevice* device) override;
// Returns true if |input_device| is a connected bluetooth device. Note this
// function may not work well if there are more than one identical Bluetooth
// devices: the function might return true even if it should return false.
// E.g., Connect two idential bluetooth devices (Input device A & input device
// B, thus the same vendor id and same product id) to Chrome OS, and then
// disconnect device A, calling IsConnectedBluetoothDevice(Input device A)
// still returns true although it should return false as Input device B is
// still connected. Unfortunately there is no good map from an InputDevice to
// a BluetoothDevice, thus we can only guess a match.
bool IsConnectedBluetoothDevice(const ui::InputDevice& input_device) const;
void InitializeOnAdapterReady(
scoped_refptr<device::BluetoothAdapter> adapter);
// Reference to the underlying Bluetooth Adapter. Used to listen for bluetooth
// device change event.
scoped_refptr<device::BluetoothAdapter> bluetooth_adapter_;
// Callback function to be called when the bluetooth adapter's status or a
// bluetooth device's status changes.
AdapterOrDeviceChangedCallback adapter_or_device_changed_callback_;
base::WeakPtrFactory<BluetoothDevicesObserver> weak_factory_;
} // namespace ash