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      1 // Copyright 2013 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 "chromeos/dbus/bluetooth_input_client.h"
      6 
      7 #include <map>
      8 
      9 #include "base/logging.h"
     10 #include "base/stl_util.h"
     11 #include "dbus/bus.h"
     12 #include "dbus/message.h"
     13 #include "dbus/object_manager.h"
     14 #include "dbus/object_path.h"
     15 #include "dbus/object_proxy.h"
     16 #include "third_party/cros_system_api/dbus/service_constants.h"
     17 
     18 namespace chromeos {
     19 
     20 BluetoothInputClient::Properties::Properties(
     21     dbus::ObjectProxy* object_proxy,
     22     const std::string& interface_name,
     23     const PropertyChangedCallback& callback)
     24     : dbus::PropertySet(object_proxy, interface_name, callback) {
     25   RegisterProperty(bluetooth_input::kReconnectModeProperty, &reconnect_mode);
     26 }
     27 
     28 BluetoothInputClient::Properties::~Properties() {
     29 }
     30 
     31 
     32 // The BluetoothInputClient implementation used in production.
     33 class BluetoothInputClientImpl
     34     : public BluetoothInputClient,
     35       public dbus::ObjectManager::Interface {
     36  public:
     37   BluetoothInputClientImpl() : object_manager_(NULL), weak_ptr_factory_(this) {}
     38 
     39   virtual ~BluetoothInputClientImpl() {
     40     object_manager_->UnregisterInterface(
     41         bluetooth_input::kBluetoothInputInterface);
     42   }
     43 
     44   // BluetoothInputClient override.
     45   virtual void AddObserver(BluetoothInputClient::Observer* observer)
     46       OVERRIDE {
     47     DCHECK(observer);
     48     observers_.AddObserver(observer);
     49   }
     50 
     51   // BluetoothInputClient override.
     52   virtual void RemoveObserver(BluetoothInputClient::Observer* observer)
     53       OVERRIDE {
     54     DCHECK(observer);
     55     observers_.RemoveObserver(observer);
     56   }
     57 
     58   // dbus::ObjectManager::Interface override.
     59   virtual dbus::PropertySet* CreateProperties(
     60       dbus::ObjectProxy* object_proxy,
     61       const dbus::ObjectPath& object_path,
     62       const std::string& interface_name) OVERRIDE {
     63     Properties* properties = new Properties(
     64         object_proxy,
     65         interface_name,
     66         base::Bind(&BluetoothInputClientImpl::OnPropertyChanged,
     67                    weak_ptr_factory_.GetWeakPtr(),
     68                    object_path));
     69     return static_cast<dbus::PropertySet*>(properties);
     70   }
     71 
     72   // BluetoothInputClient override.
     73   virtual Properties* GetProperties(const dbus::ObjectPath& object_path)
     74       OVERRIDE {
     75     return static_cast<Properties*>(
     76         object_manager_->GetProperties(
     77             object_path,
     78             bluetooth_input::kBluetoothInputInterface));
     79   }
     80 
     81  protected:
     82   virtual void Init(dbus::Bus* bus) OVERRIDE {
     83     object_manager_ = bus->GetObjectManager(
     84         bluetooth_object_manager::kBluetoothObjectManagerServiceName,
     85         dbus::ObjectPath(
     86             bluetooth_object_manager::kBluetoothObjectManagerServicePath));
     87     object_manager_->RegisterInterface(
     88         bluetooth_input::kBluetoothInputInterface, this);
     89   }
     90 
     91  private:
     92   // Called by dbus::ObjectManager when an object with the input interface
     93   // is created. Informs observers.
     94   virtual void ObjectAdded(const dbus::ObjectPath& object_path,
     95                            const std::string& interface_name) OVERRIDE {
     96     FOR_EACH_OBSERVER(BluetoothInputClient::Observer, observers_,
     97                       InputAdded(object_path));
     98   }
     99 
    100   // Called by dbus::ObjectManager when an object with the input interface
    101   // is removed. Informs observers.
    102   virtual void ObjectRemoved(const dbus::ObjectPath& object_path,
    103                              const std::string& interface_name) OVERRIDE {
    104     FOR_EACH_OBSERVER(BluetoothInputClient::Observer, observers_,
    105                       InputRemoved(object_path));
    106   }
    107 
    108   // Called by BluetoothPropertySet when a property value is changed,
    109   // either by result of a signal or response to a GetAll() or Get()
    110   // call. Informs observers.
    111   void OnPropertyChanged(const dbus::ObjectPath& object_path,
    112                          const std::string& property_name) {
    113     FOR_EACH_OBSERVER(BluetoothInputClient::Observer, observers_,
    114                       InputPropertyChanged(object_path, property_name));
    115   }
    116 
    117   dbus::ObjectManager* object_manager_;
    118 
    119   // List of observers interested in event notifications from us.
    120   ObserverList<BluetoothInputClient::Observer> observers_;
    121 
    122   // Weak pointer factory for generating 'this' pointers that might live longer
    123   // than we do.
    124   // Note: This should remain the last member so it'll be destroyed and
    125   // invalidate its weak pointers before any other members are destroyed.
    126   base::WeakPtrFactory<BluetoothInputClientImpl> weak_ptr_factory_;
    127 
    128   DISALLOW_COPY_AND_ASSIGN(BluetoothInputClientImpl);
    129 };
    130 
    131 BluetoothInputClient::BluetoothInputClient() {
    132 }
    133 
    134 BluetoothInputClient::~BluetoothInputClient() {
    135 }
    136 
    137 BluetoothInputClient* BluetoothInputClient::Create() {
    138   return new BluetoothInputClientImpl();
    139 }
    140 
    141 }  // namespace chromeos
    142