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| 1 // Copyright (c) 2012 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 #ifndef CHROME_BROWSER_CHROMEOS_BLUETOOTH_BLUETOOTH_ADAPTER_H_ | |
| 6 #define CHROME_BROWSER_CHROMEOS_BLUETOOTH_BLUETOOTH_ADAPTER_H_ | |
| 7 | |
| 8 #include <map> | |
| 9 #include <string> | |
| 10 #include <vector> | |
| 11 | |
| 12 #include "base/basictypes.h" | |
| 13 #include "base/callback.h" | |
| 14 #include "base/memory/ref_counted.h" | |
| 15 #include "base/observer_list.h" | |
| 16 #include "chromeos/dbus/bluetooth_adapter_client.h" | |
| 17 #include "chromeos/dbus/bluetooth_device_client.h" | |
| 18 #include "chromeos/dbus/bluetooth_manager_client.h" | |
| 19 #include "chromeos/dbus/bluetooth_out_of_band_client.h" | |
| 20 #include "dbus/object_path.h" | |
| 21 | |
| 22 namespace chromeos { | |
| 23 | |
| 24 class BluetoothDevice; | |
| 25 | |
| 26 // The BluetoothAdapter class represents a local Bluetooth adapter which | |
| 27 // may be used to interact with remote Bluetooth devices. As well as | |
| 28 // providing support for determining whether an adapter is present, and | |
| 29 // whether the radio is powered, this class also provides support for | |
| 30 // obtaining the list of remote devices known to the adapter, discovering | |
| 31 // new devices, and providing notification of updates to device information. | |
| 32 // | |
| 33 // The class may be instantiated for either a specific adapter, or for the | |
| 34 // generic "default adapter" which may change depending on availability. | |
| 35 class BluetoothAdapter : public base::RefCounted<BluetoothAdapter>, | |
| 36 public BluetoothManagerClient::Observer, | |
| 37 public BluetoothAdapterClient::Observer, | |
| 38 public BluetoothDeviceClient::Observer { | |
| 39 public: | |
| 40 // Interface for observing changes from bluetooth adapters. | |
| 41 class Observer { | |
| 42 public: | |
| 43 virtual ~Observer() {} | |
| 44 | |
| 45 // Called when the presence of the adapter |adapter| changes, when | |
| 46 // |present| is true the adapter is now present, false means the adapter | |
| 47 // has been removed from the system. | |
| 48 virtual void AdapterPresentChanged(BluetoothAdapter* adapter, | |
| 49 bool present) {} | |
| 50 | |
| 51 // Called when the radio power state of the adapter |adapter| changes, | |
| 52 // when |powered| is true the adapter radio is powered, false means the | |
| 53 // adapter radio is off. | |
| 54 virtual void AdapterPoweredChanged(BluetoothAdapter* adapter, | |
| 55 bool powered) {} | |
| 56 | |
| 57 // Called when the discovering state of the adapter |adapter| changes, | |
| 58 // when |discovering| is true the adapter is seeking new devices, false | |
| 59 // means it is not. Note that device discovery involves both states when | |
| 60 // the adapter is seeking new devices and states when it is not because | |
| 61 // it is interrogating the devices it found. | |
| 62 virtual void AdapterDiscoveringChanged(BluetoothAdapter* adapter, | |
| 63 bool discovering) {} | |
| 64 | |
| 65 // Called when a new device |device| is added to the adapter |adapter|, | |
| 66 // either because it has been discovered or a connection made. |device| | |
| 67 // should not be cached, instead copy its address. | |
| 68 virtual void DeviceAdded(BluetoothAdapter* adapter, | |
| 69 BluetoothDevice* device) {} | |
| 70 | |
| 71 // Called when properties of the device |device| known to the adapter | |
| 72 // |adapter| change. |device| should not be cached, instead copy its | |
| 73 // address. | |
| 74 virtual void DeviceChanged(BluetoothAdapter* adapter, | |
| 75 BluetoothDevice* device) {} | |
| 76 | |
| 77 // Called when the device |device| is removed from the adapter |adapter|, | |
| 78 // either as a result of a discovered device being lost between discovering | |
| 79 // phases or pairing information deleted. |device| should not be cached. | |
| 80 virtual void DeviceRemoved(BluetoothAdapter* adapter, | |
| 81 BluetoothDevice* device) {} | |
| 82 }; | |
| 83 | |
| 84 // Adds and removes observers for events on this bluetooth adapter, | |
| 85 // if monitoring multiple adapters check the |adapter| parameter of | |
| 86 // observer methods to determine which adapter is issuing the event. | |
| 87 void AddObserver(Observer* observer); | |
| 88 void RemoveObserver(Observer* observer); | |
| 89 | |
| 90 // The ErrorCallback is used for methods that can fail in which case it | |
| 91 // is called, in the success case the callback is simply not called. | |
| 92 typedef base::Callback<void()> ErrorCallback; | |
| 93 | |
| 94 // The BluetoothOutOfBandPairingDataCallback is used to return | |
| 95 // BluetoothOutOfBandPairingData to the caller. | |
| 96 typedef base::Callback<void(const BluetoothOutOfBandPairingData& data)> | |
| 97 BluetoothOutOfBandPairingDataCallback; | |
| 98 | |
| 99 // The address of this adapter. The address format is "XX:XX:XX:XX:XX:XX", | |
| 100 // where each XX is a hexadecimal number. | |
| 101 const std::string& address() const { return address_; } | |
| 102 | |
| 103 // The name of the adapter. | |
| 104 const std::string& name() const { return name_; } | |
| 105 | |
| 106 // Indicates whether the adapter is actually present on the system, for | |
| 107 // the default adapter this indicates whether any adapter is present. | |
| 108 virtual bool IsPresent() const; | |
| 109 | |
| 110 // Indicates whether the adapter radio is powered. | |
| 111 virtual bool IsPowered() const; | |
| 112 | |
| 113 // Requests a change to the adapter radio power, setting |powered| to true | |
| 114 // will turn on the radio and false will turn it off. On success, callback | |
| 115 // will be called. On failure, |error_callback| will be called. | |
| 116 void SetPowered(bool powered, | |
| 117 const base::Closure& callback, | |
| 118 const ErrorCallback& error_callback); | |
| 119 | |
| 120 // Indicates whether the adapter is currently discovering new devices, | |
| 121 // note that a typical discovery process has phases of this being true | |
| 122 // followed by phases of being false when the adapter interrogates the | |
| 123 // devices found. | |
| 124 virtual bool IsDiscovering() const; | |
| 125 | |
| 126 // Requests that the adapter either begin discovering new devices when | |
| 127 // |discovering| is true, or cease any discovery when false. On success, | |
| 128 // callback will be called. On failure, |error_callback| will be called. | |
| 129 virtual void SetDiscovering(bool discovering, | |
| 130 const base::Closure& callback, | |
| 131 const ErrorCallback& error_callback); | |
| 132 | |
| 133 // Requests the list of devices from the adapter, all are returned | |
| 134 // including those currently connected and those paired. Use the | |
| 135 // returned device pointers to determine which they are. | |
| 136 typedef std::vector<BluetoothDevice*> DeviceList; | |
| 137 virtual DeviceList GetDevices(); | |
| 138 typedef std::vector<const BluetoothDevice*> ConstDeviceList; | |
| 139 virtual ConstDeviceList GetDevices() const; | |
| 140 | |
| 141 // Returns a pointer to the device with the given address |address| or | |
| 142 // NULL if no such device is known. | |
| 143 virtual BluetoothDevice* GetDevice(const std::string& address); | |
| 144 virtual const BluetoothDevice* GetDevice(const std::string& address) const; | |
| 145 | |
| 146 // Requests the local Out Of Band pairing data. | |
| 147 virtual void ReadLocalOutOfBandPairingData( | |
| 148 const BluetoothOutOfBandPairingDataCallback& callback, | |
| 149 const ErrorCallback& error_callback); | |
| 150 | |
| 151 // Returns the shared instance for the default adapter, whichever that may | |
| 152 // be at the time. Use IsPresent() and the AdapterPresentChanged() observer | |
| 153 // method to determine whether an adapter is actually available or not. | |
| 154 static scoped_refptr<BluetoothAdapter> DefaultAdapter(); | |
| 155 | |
| 156 // Creates an instance for a specific adapter named by |address|, which | |
| 157 // may be the bluetooth address of the adapter or a device name such as | |
| 158 // "hci0". | |
| 159 static BluetoothAdapter* Create(const std::string& address); | |
| 160 | |
| 161 private: | |
| 162 friend class base::RefCounted<BluetoothAdapter>; | |
| 163 friend class BluetoothDevice; | |
| 164 friend class MockBluetoothAdapter; | |
| 165 | |
| 166 BluetoothAdapter(); | |
| 167 virtual ~BluetoothAdapter(); | |
| 168 | |
| 169 // Obtains the default adapter object path from the Bluetooth Daemon | |
| 170 // and tracks future changes to it. | |
| 171 void TrackDefaultAdapter(); | |
| 172 | |
| 173 // Obtains the object paht for the adapter named by |address| from the | |
| 174 // Bluetooth Daemon. | |
| 175 void FindAdapter(const std::string& address); | |
| 176 | |
| 177 // Called by dbus:: in response to the method call sent by both | |
| 178 // DefaultAdapter() and FindAdapter(), |object_path| will contain the | |
| 179 // dbus object path of the requested adapter when |success| is true. | |
| 180 void AdapterCallback(const dbus::ObjectPath& adapter_path, bool success); | |
| 181 | |
| 182 // BluetoothManagerClient::Observer override. | |
| 183 // | |
| 184 // Called when the default local bluetooth adapter changes. | |
| 185 // |object_path| is the dbus object path of the new default adapter. | |
| 186 // Not called if all adapters are removed. | |
| 187 virtual void DefaultAdapterChanged(const dbus::ObjectPath& adapter_path) | |
| 188 OVERRIDE; | |
| 189 | |
| 190 // BluetoothManagerClient::Observer override. | |
| 191 // | |
| 192 // Called when a local bluetooth adapter is removed. | |
| 193 // |object_path| is the dbus object path of the adapter. | |
| 194 virtual void AdapterRemoved(const dbus::ObjectPath& adapter_path) OVERRIDE; | |
| 195 | |
| 196 // Changes the tracked adapter to the dbus object path |adapter_path|, | |
| 197 // clearing information from the previously tracked adapter and updating | |
| 198 // to the new adapter. | |
| 199 void ChangeAdapter(const dbus::ObjectPath& adapter_path); | |
| 200 | |
| 201 // Clears the tracked adapter information. | |
| 202 void RemoveAdapter(); | |
| 203 | |
| 204 // Called by dbus:: in response to the method call send by SetPowered(). | |
| 205 // |callback| and |error_callback| are the callbacks passed to SetPowered(). | |
| 206 void OnSetPowered(const base::Closure& callback, | |
| 207 const ErrorCallback& error_callback, | |
| 208 bool success); | |
| 209 | |
| 210 // Updates the tracked state of the adapter's radio power to |powered| | |
| 211 // and notifies observers. Called on receipt of a property changed signal, | |
| 212 // and directly using values obtained from properties. | |
| 213 void PoweredChanged(bool powered); | |
| 214 | |
| 215 // Called by dbus:: in response to the method calls send by SetDiscovering(). | |
| 216 // |callback| and |error_callback| are the callbacks passed to | |
| 217 // SetDiscovering(). | |
| 218 void OnStartDiscovery(const base::Closure& callback, | |
| 219 const ErrorCallback& error_callback, | |
| 220 const dbus::ObjectPath& adapter_path, | |
| 221 bool success); | |
| 222 void OnStopDiscovery(const base::Closure& callback, | |
| 223 const ErrorCallback& error_callback, | |
| 224 const dbus::ObjectPath& adapter_path, | |
| 225 bool success); | |
| 226 | |
| 227 // Updates the tracked state of the adapter's discovering state to | |
| 228 // |discovering| and notifies observers. Called on receipt of a property | |
| 229 // changed signal, and directly using values obtained from properties. | |
| 230 void DiscoveringChanged(bool discovering); | |
| 231 | |
| 232 // Called by dbus:: in response to the ReadLocalData method call. | |
| 233 void OnReadLocalData(const BluetoothOutOfBandPairingDataCallback& callback, | |
| 234 const ErrorCallback& error_callback, | |
| 235 const BluetoothOutOfBandPairingData& data, | |
| 236 bool success); | |
| 237 | |
| 238 // BluetoothAdapterClient::Observer override. | |
| 239 // | |
| 240 // Called when the adapter with object path |adapter_path| has a | |
| 241 // change in value of the property named |property_name|. | |
| 242 virtual void AdapterPropertyChanged(const dbus::ObjectPath& adapter_path, | |
| 243 const std::string& property_name) | |
| 244 OVERRIDE; | |
| 245 | |
| 246 // BluetoothDeviceClient::Observer override. | |
| 247 // | |
| 248 // Called when the device with object path |device_path| has a | |
| 249 // change in value of the property named |property_name|. | |
| 250 virtual void DevicePropertyChanged(const dbus::ObjectPath& device_path, | |
| 251 const std::string& property_name) | |
| 252 OVERRIDE; | |
| 253 | |
| 254 // Updates information on the device with object path |device_path|, | |
| 255 // adding it to the |devices_| map if not already present. | |
| 256 void UpdateDevice(const dbus::ObjectPath& device_path); | |
| 257 | |
| 258 // Clears the |devices_| list, notifying obsevers of the device removal. | |
| 259 void ClearDevices(); | |
| 260 | |
| 261 // BluetoothAdapterClient::Observer override. | |
| 262 // | |
| 263 // Called when the adapter with object path |object_path| has a | |
| 264 // new known device with object path |object_path|. | |
| 265 virtual void DeviceCreated(const dbus::ObjectPath& adapter_path, | |
| 266 const dbus::ObjectPath& device_path) OVERRIDE; | |
| 267 | |
| 268 // BluetoothAdapterClient::Observer override. | |
| 269 // | |
| 270 // Called when the adapter with object path |object_path| removes | |
| 271 // the known device with object path |object_path|. | |
| 272 virtual void DeviceRemoved(const dbus::ObjectPath& adapter_path, | |
| 273 const dbus::ObjectPath& device_path) OVERRIDE; | |
| 274 | |
| 275 // Updates the adapter |devices_| list, adding or updating devices using | |
| 276 // the object paths in the|devices| list. This doesn't remove devices, | |
| 277 // relying instead on the DeviceRemoved() signal for that. Called on | |
| 278 // receipt of a property changed signal, and directly using values obtained | |
| 279 // from properties. | |
| 280 void DevicesChanged(const std::vector<dbus::ObjectPath>& devices); | |
| 281 | |
| 282 // Clears discovered devices from the |devices_| list, notifying | |
| 283 // observers, and leaving only those devices with a dbus object path. | |
| 284 void ClearDiscoveredDevices(); | |
| 285 | |
| 286 // BluetoothAdapterClient::Observer override. | |
| 287 // | |
| 288 // Called when the adapter with object path |object_path| discovers | |
| 289 // a new remote device with address |address| and properties | |
| 290 // |properties|, there is no device object path until connected. | |
| 291 // | |
| 292 // |properties| supports only value() calls, not Get() or Set(), and | |
| 293 // should be copied if needed. | |
| 294 virtual void DeviceFound( | |
| 295 const dbus::ObjectPath& adapter_path, const std::string& address, | |
| 296 const BluetoothDeviceClient::Properties& properties) OVERRIDE; | |
| 297 | |
| 298 // BluetoothAdapterClient::Observer override. | |
| 299 // | |
| 300 // Called when the adapter with object path |object_path| can no | |
| 301 // longer communicate with the discovered removed device with | |
| 302 // address |address|. | |
| 303 virtual void DeviceDisappeared(const dbus::ObjectPath& object_path, | |
| 304 const std::string& address) OVERRIDE; | |
| 305 | |
| 306 // List of observers interested in event notifications from us. | |
| 307 ObserverList<BluetoothAdapter::Observer> observers_; | |
| 308 | |
| 309 // Weak pointer factory for generating 'this' pointers that might live longer | |
| 310 // than we do. | |
| 311 base::WeakPtrFactory<BluetoothAdapter> weak_ptr_factory_; | |
| 312 | |
| 313 // Object path of adapter for this instance, this is fixed at creation time | |
| 314 // unless |track_default_| is true in which case we update it to always | |
| 315 // point at the default adapter. | |
| 316 bool track_default_; | |
| 317 dbus::ObjectPath object_path_; | |
| 318 | |
| 319 // Address of the adapter. | |
| 320 std::string address_; | |
| 321 | |
| 322 // Name of the adapter. | |
| 323 std::string name_; | |
| 324 | |
| 325 // Tracked adapter state, cached locally so we only send change notifications | |
| 326 // to observers on a genuine change. | |
| 327 bool powered_; | |
| 328 bool discovering_; | |
| 329 | |
| 330 // Devices paired with, connected to, discovered by, or visible to the | |
| 331 // adapter. The key is the Bluetooth address of the device and the value | |
| 332 // is the BluetoothDevice object whose lifetime is managed by the adapter | |
| 333 // instance. | |
| 334 typedef std::map<const std::string, BluetoothDevice*> DevicesMap; | |
| 335 DevicesMap devices_; | |
| 336 | |
| 337 DISALLOW_COPY_AND_ASSIGN(BluetoothAdapter); | |
| 338 }; | |
| 339 | |
| 340 } // namespace chromeos | |
| 341 | |
| 342 #endif // CHROME_BROWSER_CHROMEOS_BLUETOOTH_BLUETOOTH_ADAPTER_H_ | |
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Chromium Code Reviews
Issue 10899037:
Refactoring bluetooth API code. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src