device/nfc/nfc_tag_chromeos.h

   1 // Copyright 2014 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_TAG_CHROMEOS_H_
   6 #define DEVICE_NFC_NFC_TAG_CHROMEOS_H_
   7
   8 #include <string>
   9
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/observer_list.h"
  12 #include "chromeos/dbus/nfc_tag_client.h"
  13 #include "dbus/object_path.h"
  14 #include "device/nfc/nfc_tag.h"
  15
  16 namespace chromeos {
  17
  18 class NfcNdefTagTechnologyChromeOS;
  19
  20 // The NfcTagChromeOS class implements device::NfcTag for the Chrome OS
  21 // platform.
  22 class NfcTagChromeOS : public device::NfcTag,
  23                        public NfcTagClient::Observer {
  24  public:
  25   // device::NfcTag overrides.
  26   void AddObserver(device::NfcTag::Observer* observer) override;
  27   void RemoveObserver(device::NfcTag::Observer* observer) override;
  28   std::string GetIdentifier() const override;
  29   TagType GetType() const override;
  30   bool IsReadOnly() const override;
  31   device::NfcTag::Protocol GetSupportedProtocol() const override;
  32   device::NfcTagTechnology::TechnologyTypeMask GetSupportedTechnologies()
  33       const override;
  34   bool IsReady() const override;
  35   device::NfcNdefTagTechnology* GetNdefTagTechnology() override;
  36
  37   // NfcTagClient::Observer overrides.
  38   void TagPropertyChanged(const dbus::ObjectPath& object_path,
  39                           const std::string& property_name) override;
  40   void TagPropertiesReceived(const dbus::ObjectPath& object_path) override;
  41
  42   // Object path representing the remote tag object.
  43   const dbus::ObjectPath& object_path() const { return object_path_; }
  44
  45  private:
  46   friend class NfcAdapterChromeOS;
  47
  48   explicit NfcTagChromeOS(const dbus::ObjectPath& object_path);
  49   ~NfcTagChromeOS() override;
  50
  51   // Object path of the tag that we are currently tracking.
  52   dbus::ObjectPath object_path_;
  53
  54   // Stores whether or not the initial set of properties have been received.
  55   bool is_ready_;
  56
  57   // The NfcNdefTagTechnology instance that allows users to perform NDEF
  58   // read and write on this tag.
  59   scoped_ptr<NfcNdefTagTechnologyChromeOS> ndef_technology_;
  60
  61   // List of observers interested in event notifications from us.
  62   ObserverList<device::NfcTag::Observer> observers_;
  63
  64   DISALLOW_COPY_AND_ASSIGN(NfcTagChromeOS);
  65 };
  66
  67 }  // namespace chromeos
  68
  69 #endif  // DEVICE_NFC_NFC_TAG_CHROMEOS_H_