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   virtual void AddObserver(NfcAdapter::Observer* observer) override;
  33   virtual void RemoveObserver(NfcAdapter::Observer* observer) override;
  34   virtual bool IsPresent() const override;
  35   virtual bool IsPowered() const override;
  36   virtual bool IsPolling() const override;
  37   virtual bool IsInitialized() const override;
  38   virtual void SetPowered(bool powered,
  39                           const base::Closure& callback,
  40                           const ErrorCallback& error_callback) override;
  41   virtual void StartPolling(const base::Closure& callback,
  42                             const ErrorCallback& error_callback) override;
  43   virtual 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   virtual ~NfcAdapterChromeOS();
  52
  53   // NfcAdapterClient::Observer overrides.
  54   virtual void AdapterAdded(const dbus::ObjectPath& object_path) override;
  55   virtual void AdapterRemoved(const dbus::ObjectPath& object_path) override;
  56   virtual void AdapterPropertyChanged(
  57       const dbus::ObjectPath& object_path,
  58       const std::string& property_name) override;
  59
  60   // NfcDeviceClient::Observer overrides.
  61   virtual void DeviceAdded(const dbus::ObjectPath& object_path) override;
  62   virtual void DeviceRemoved(const dbus::ObjectPath& object_path) override;
  63
  64   // NfcTagClient::Observer overrides.
  65   virtual void TagAdded(const dbus::ObjectPath& object_path) override;
  66   virtual void TagRemoved(const dbus::ObjectPath& object_path) override;
  67
  68   // Set the tracked adapter to the one in |object_path|, this object will
  69   // subsequently operate on that adapter until it is removed.
  70   void SetAdapter(const dbus::ObjectPath& object_path);
  71
  72   // Remove the currently tracked adapter. IsPresent() will return false after
  73   // this is called.
  74   void RemoveAdapter();
  75
  76   // Announce to observers a change in the adapter state.
  77   void PoweredChanged(bool powered);
  78   void PollingChanged(bool polling);
  79   void PresentChanged(bool present);
  80
  81   // Called by dbus:: on completion of the powered property change.
  82   void OnSetPowered(const base::Closure& callback,
  83                     const ErrorCallback& error_callback,
  84                     bool success);
  85
  86   // Called by dbus:: on completion of the D-Bus method call to start polling.
  87   void OnStartPolling(const base::Closure& callback);
  88   void OnStartPollingError(const ErrorCallback& error_callback,
  89                            const std::string& error_name,
  90                            const std::string& error_message);
  91
  92   // Called by dbus:: on completion of the D-Bus method call to stop polling.
  93   void OnStopPolling(const base::Closure& callback);
  94   void OnStopPollingError(const ErrorCallback& error_callback,
  95                           const std::string& error_name,
  96                           const std::string& error_message);
  97
  98   // Object path of the adapter that we are currently tracking.
  99   dbus::ObjectPath object_path_;
 100
 101   // List of observers interested in event notifications from us.
 102   ObserverList<device::NfcAdapter::Observer> observers_;
 103
 104   // Note: This should remain the last member so it'll be destroyed and
 105   // invalidate its weak pointers before any other members are destroyed.
 106   base::WeakPtrFactory<NfcAdapterChromeOS> weak_ptr_factory_;
 107
 108   DISALLOW_COPY_AND_ASSIGN(NfcAdapterChromeOS);
 109 };
 110
 111 }  // namespace chromeos
 112
 113 #endif  // DEVICE_NFC_NFC_ADAPTER_CHROMEOS_H_