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     : BluetoothGattConnection(adapter.get(), device_address),
  20       connected_(true),
  21       object_path_(object_path) {
  22   DCHECK(adapter_.get());
  23   DCHECK(!device_address_.empty());
  24   DCHECK(object_path_.IsValid());
  25
  26   DBusThreadManager::Get()->GetBluetoothDeviceClient()->AddObserver(this);
  27 }
  28
  29 BluetoothGattConnectionChromeOS::~BluetoothGattConnectionChromeOS() {
  30   DBusThreadManager::Get()->GetBluetoothDeviceClient()->RemoveObserver(this);
  31   Disconnect();
  32 }
  33
  34 bool BluetoothGattConnectionChromeOS::IsConnected() {
  35   // Lazily determine the activity state of the connection. If already
  36   // marked as inactive, then return false. Otherwise, explicitly mark
  37   // |connected_| as false if the device is removed or disconnected. We do this,
  38   // so that if this method is called during a call to DeviceRemoved or
  39   // DeviceChanged somewhere else, it returns the correct status.
  40   if (!connected_)
  41     return false;
  42
  43   BluetoothDeviceClient::Properties* properties =
  44       DBusThreadManager::Get()->GetBluetoothDeviceClient()->
  45           GetProperties(object_path_);
  46   if (!properties || !properties->connected.value())
  47     connected_ = false;
  48
  49   return connected_;
  50 }
  51
  52 void BluetoothGattConnectionChromeOS::Disconnect() {
  53   if (!connected_) {
  54     VLOG(1) << "Connection already inactive.";
  55     return;
  56   }
  57
  58   // TODO(armansito): There isn't currently a good way to manage the ownership
  59   // of a connection between Chrome and bluetoothd plugins/profiles. Until
  60   // a proper reference count is kept by bluetoothd, we might unwittingly kill
  61   // a connection that is managed by the daemon (e.g. HoG). For now, just return
  62   // success to indicate that this BluetoothGattConnection is no longer active,
  63   // even though the underlying connection won't actually be disconnected. This
  64   // technically doesn't violate the contract put forth by this API.
  65   connected_ = false;
  66 }
  67
  68 void BluetoothGattConnectionChromeOS::DeviceRemoved(
  69     const dbus::ObjectPath& object_path) {
  70   if (object_path != object_path_)
  71     return;
  72
  73   connected_ = false;
  74 }
  75
  76 void BluetoothGattConnectionChromeOS::DevicePropertyChanged(
  77     const dbus::ObjectPath& object_path,
  78     const std::string& property_name) {
  79   if (object_path != object_path_)
  80     return;
  81
  82   if (!connected_)
  83     return;
  84
  85   BluetoothDeviceClient::Properties* properties =
  86       DBusThreadManager::Get()->GetBluetoothDeviceClient()->
  87           GetProperties(object_path_);
  88
  89   if (!properties) {
  90     connected_ = false;
  91     return;
  92   }
  93
  94   if (property_name == properties->connected.name() &&
  95       !properties->connected.value())
  96     connected_ = false;
  97 }
  98
  99 }  // namespace chromeos