device/bluetooth: Improvements to GATT descriptor access API.

device/bluetooth/bluetooth_remote_gatt_service_chromeos.h

 // 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.
 
 #ifndef DEVICE_BLUETOOTH_BLUETOOTH_REMOTE_GATT_SERVICE_CHROMEOS_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_REMOTE_GATT_SERVICE_CHROMEOS_H_
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "chromeos/dbus/bluetooth_gatt_characteristic_client.h"
 #include "chromeos/dbus/bluetooth_gatt_service_client.h"
 #include "dbus/object_path.h"
 #include "device/bluetooth/bluetooth_gatt_service.h"
 #include "device/bluetooth/bluetooth_uuid.h"
 
 namespace device {
 
 class BluetoothGattCharacteristic;
 
 }  // namespace device
 
 namespace chromeos {
 
 class BluetoothDeviceChromeOS;
 class BluetoothRemoteGattCharacteristicChromeOS;
+class BluetoothRemoteGattDescriptorChromeOS;
 
 // The BluetoothRemoteGattServiceChromeOS class implements BluetootGattService
 // for remote GATT services on the the Chrome OS platform.
 class BluetoothRemoteGattServiceChromeOS
     : public device::BluetoothGattService,
       public BluetoothGattServiceClient::Observer,
       public BluetoothGattCharacteristicClient::Observer {
  public:
   // device::BluetoothGattService overrides.
   virtual void AddObserver(
@@ skipping 21 matching lines @@
                           const ErrorCallback& error_callback) OVERRIDE;
 
   // Object path of the underlying service.
   const dbus::ObjectPath& object_path() const { return object_path_; }
 
   // Notifies its observers that the GATT service has changed. This is mainly
   // used by BluetoothRemoteGattCharacteristicChromeOS instances to notify
   // service observers when characteristic descriptors get added and removed.
   void NotifyServiceChanged();
 
+  // Notifies its observers that a descriptor |descriptor| belonging to
+  // characteristic |characteristic| has been added or removed. This is used
+  // by BluetoothRemoteGattCharacteristicChromeOS instances to notify service
+  // observers when characteristic descriptors get added and removed. If |added|
+  // is true, an "Added" event will be sent. Otherwise, a "Removed" event will
+  // be sent.
+  void NotifyDescriptorAddedOrRemoved(
+      BluetoothRemoteGattCharacteristicChromeOS* characteristic,
+      BluetoothRemoteGattDescriptorChromeOS* descriptor,
+      bool added);
+
+  // Notifies its observers that the value of a descriptor has changed. Called
+  // by BluetoothRemoteGattCharacteristicChromeOS instances to notify service
+  // observers when the value of one of their descriptors gets updated.
+  void NotifyDescriptorValueChanged(
+      BluetoothRemoteGattCharacteristicChromeOS* characteristic,
+      BluetoothRemoteGattDescriptorChromeOS* descriptor,
+      const std::vector<uint8>& value);
+
  private:
   friend class BluetoothDeviceChromeOS;
 
   BluetoothRemoteGattServiceChromeOS(BluetoothDeviceChromeOS* device,
                                      const dbus::ObjectPath& object_path);
   virtual ~BluetoothRemoteGattServiceChromeOS();
 
   // BluetoothGattServiceClient::Observer override.
   virtual void GattServicePropertyChanged(
       const dbus::ObjectPath& object_path,
@@ skipping 28 matching lines @@
   // Note: This should remain the last member so it'll be destroyed and
   // invalidate its weak pointers before any other members are destroyed.
   base::WeakPtrFactory<BluetoothRemoteGattServiceChromeOS> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BluetoothRemoteGattServiceChromeOS);
 };
 
 }  // namespace chromeos
 
 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_REMOTE_GATT_SERVICE_CHROMEOS_H_