device/bluetooth/bluetooth_gatt_connection_chromeos.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "device/bluetooth/bluetooth_gatt_connection_chromeos.h"
   6
   7 #include "base/bind.h"
   8 #include "base/logging.h"
   9 #include "chromeos/dbus/dbus_thread_manager.h"
  10 #include "device/bluetooth/bluetooth_adapter.h"
  11 #include "device/bluetooth/bluetooth_device.h"
  12
  13 namespace chromeos {
  14
  15 BluetoothGattConnectionChromeOS::BluetoothGattConnectionChromeOS(
  16     scoped_refptr<device::BluetoothAdapter> adapter,
  17     const std::string& device_address,
  18     const dbus::ObjectPath& object_path)
  19     : connected_(true),
  20       adapter_(adapter),
  21       device_address_(device_address),
  22       object_path_(object_path) {
  23   DCHECK(adapter_.get());
  24   DCHECK(!device_address_.empty());
  25   DCHECK(object_path_.IsValid());
  26
  27   DBusThreadManager::Get()->GetBluetoothDeviceClient()->AddObserver(this);
  28 }
  29
  30 BluetoothGattConnectionChromeOS::~BluetoothGattConnectionChromeOS() {
  31   DBusThreadManager::Get()->GetBluetoothDeviceClient()->RemoveObserver(this);
  32   Disconnect(base::Bind(&base::DoNothing));
  33 }
  34
  35 std::string BluetoothGattConnectionChromeOS::GetDeviceAddress() const {
  36   return device_address_;
  37 }
  38
  39 bool BluetoothGattConnectionChromeOS::IsConnected() {
  40   // Lazily determine the activity state of the connection. If already
  41   // marked as inactive, then return false. Otherwise, explicitly mark
  42   // |connected_| as false if the device is removed or disconnected. We do this,
  43   // so that if this method is called during a call to DeviceRemoved or
  44   // DeviceChanged somewhere else, it returns the correct status.
  45   if (!connected_)
  46     return false;
  47
  48   BluetoothDeviceClient::Properties* properties =
  49       DBusThreadManager::Get()->GetBluetoothDeviceClient()->
  50           GetProperties(object_path_);
  51   if (!properties || !properties->connected.value())
  52     connected_ = false;
  53
  54   return connected_;
  55 }
  56
  57 void BluetoothGattConnectionChromeOS::Disconnect(
  58     const base::Closure& callback) {
  59   if (!connected_) {
  60     VLOG(1) << "Connection already inactive.";
  61     callback.Run();
  62     return;
  63   }
  64
  65   // TODO(armansito): There isn't currently a good way to manage the ownership
  66   // of a connection between Chrome and bluetoothd plugins/profiles. Until
  67   // a proper reference count is kept by bluetoothd, we might unwittingly kill
  68   // a connection that is managed by the daemon (e.g. HoG). For now, just return
  69   // success to indicate that this BluetoothGattConnection is no longer active,
  70   // even though the underlying connection won't actually be disconnected. This
  71   // technically doesn't violate the contract put forth by this API.
  72   connected_ = false;
  73   callback.Run();
  74 }
  75
  76 void BluetoothGattConnectionChromeOS::DeviceRemoved(
  77     const dbus::ObjectPath& object_path) {
  78   if (object_path != object_path_)
  79     return;
  80
  81   connected_ = false;
  82 }
  83
  84 void BluetoothGattConnectionChromeOS::DevicePropertyChanged(
  85     const dbus::ObjectPath& object_path,
  86     const std::string& property_name) {
  87   if (object_path != object_path_)
  88     return;
  89
  90   if (!connected_)
  91     return;
  92
  93   BluetoothDeviceClient::Properties* properties =
  94       DBusThreadManager::Get()->GetBluetoothDeviceClient()->
  95           GetProperties(object_path_);
  96
  97   if (!properties) {
  98     connected_ = false;
  99     return;
 100   }
 101
 102   if (property_name == properties->connected.name() &&
 103       !properties->connected.value())
 104     connected_ = false;
 105 }
 106
 107 }  // namespace chromeos