device/nfc/nfc_adapter_chromeos.h

   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 #ifndef DEVICE_NFC_NFC_ADAPTER_CHROMEOS_H_
   6 #define DEVICE_NFC_NFC_ADAPTER_CHROMEOS_H_
   7
   8 #include "base/memory/weak_ptr.h"
   9 #include "base/observer_list.h"
  10 #include "chromeos/dbus/nfc_adapter_client.h"
  11 #include "chromeos/dbus/nfc_device_client.h"
  12 #include "chromeos/dbus/nfc_tag_client.h"
  13 #include "dbus/object_path.h"
  14 #include "device/nfc/nfc_adapter.h"
  15
  16 namespace device {
  17
  18 class NfcAdapterFactory;
  19
  20 }  // namespace device
  21
  22 namespace chromeos {
  23
  24 // The NfcAdapterChromeOS class implements NfcAdapter for the Chrome OS
  25 // platform.
  26 class NfcAdapterChromeOS : public device::NfcAdapter,
  27                            public chromeos::NfcAdapterClient::Observer,
  28                            public chromeos::NfcDeviceClient::Observer,
  29                            public chromeos::NfcTagClient::Observer {
  30  public:
  31   // NfcAdapter overrides.
  32   void AddObserver(NfcAdapter::Observer* observer) override;
  33   void RemoveObserver(NfcAdapter::Observer* observer) override;
  34   bool IsPresent() const override;
  35   bool IsPowered() const override;
  36   bool IsPolling() const override;
  37   bool IsInitialized() const override;
  38   void SetPowered(bool powered,
  39                   const base::Closure& callback,
  40                   const ErrorCallback& error_callback) override;
  41   void StartPolling(const base::Closure& callback,
  42                     const ErrorCallback& error_callback) override;
  43   void StopPolling(const base::Closure& callback,
  44                    const ErrorCallback& error_callback) override;
  45
  46  private:
  47   friend class device::NfcAdapterFactory;
  48   friend class NfcChromeOSTest;
  49
  50   NfcAdapterChromeOS();
  51   ~NfcAdapterChromeOS() override;
  52
  53   // NfcAdapterClient::Observer overrides.
  54   void AdapterAdded(const dbus::ObjectPath& object_path) override;
  55   void AdapterRemoved(const dbus::ObjectPath& object_path) override;
  56   void AdapterPropertyChanged(const dbus::ObjectPath& object_path,
  57                               const std::string& property_name) override;
  58
  59   // NfcDeviceClient::Observer overrides.
  60   void DeviceAdded(const dbus::ObjectPath& object_path) override;
  61   void DeviceRemoved(const dbus::ObjectPath& object_path) override;
  62
  63   // NfcTagClient::Observer overrides.
  64   void TagAdded(const dbus::ObjectPath& object_path) override;
  65   void TagRemoved(const dbus::ObjectPath& object_path) override;
  66
  67   // Set the tracked adapter to the one in |object_path|, this object will
  68   // subsequently operate on that adapter until it is removed.
  69   void SetAdapter(const dbus::ObjectPath& object_path);
  70
  71   // Remove the currently tracked adapter. IsPresent() will return false after
  72   // this is called.
  73   void RemoveAdapter();
  74
  75   // Announce to observers a change in the adapter state.
  76   void PoweredChanged(bool powered);
  77   void PollingChanged(bool polling);
  78   void PresentChanged(bool present);
  79
  80   // Called by dbus:: on completion of the powered property change.
  81   void OnSetPowered(const base::Closure& callback,
  82                     const ErrorCallback& error_callback,
  83                     bool success);
  84
  85   // Called by dbus:: on completion of the D-Bus method call to start polling.
  86   void OnStartPolling(const base::Closure& callback);
  87   void OnStartPollingError(const ErrorCallback& error_callback,
  88                            const std::string& error_name,
  89                            const std::string& error_message);
  90
  91   // Called by dbus:: on completion of the D-Bus method call to stop polling.
  92   void OnStopPolling(const base::Closure& callback);
  93   void OnStopPollingError(const ErrorCallback& error_callback,
  94                           const std::string& error_name,
  95                           const std::string& error_message);
  96
  97   // Object path of the adapter that we are currently tracking.
  98   dbus::ObjectPath object_path_;
  99
 100   // List of observers interested in event notifications from us.
 101   base::ObserverList<device::NfcAdapter::Observer> observers_;
 102
 103   // Note: This should remain the last member so it'll be destroyed and
 104   // invalidate its weak pointers before any other members are destroyed.
 105   base::WeakPtrFactory<NfcAdapterChromeOS> weak_ptr_factory_;
 106
 107   DISALLOW_COPY_AND_ASSIGN(NfcAdapterChromeOS);
 108 };
 109
 110 }  // namespace chromeos
 111
 112 #endif  // DEVICE_NFC_NFC_ADAPTER_CHROMEOS_H_