ash/system/chromeos/bluetooth/bluetooth_notification_controller.cc

   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 #include "ash/system/chromeos/bluetooth/bluetooth_notification_controller.h"
   6
   7 #include "ash/system/system_notifier.h"
   8 #include "base/bind.h"
   9 #include "base/callback.h"
  10 #include "base/logging.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/strings/stringprintf.h"
  13 #include "base/strings/utf_string_conversions.h"
  14 #include "device/bluetooth/bluetooth_adapter_factory.h"
  15 #include "device/bluetooth/bluetooth_device.h"
  16 #include "grit/ash_resources.h"
  17 #include "grit/ash_strings.h"
  18 #include "ui/base/l10n/l10n_util.h"
  19 #include "ui/base/resource/resource_bundle.h"
  20 #include "ui/message_center/message_center.h"
  21 #include "ui/message_center/notification.h"
  22 #include "ui/message_center/notification_delegate.h"
  23 #include "ui/message_center/notification_types.h"
  24
  25 using device::BluetoothAdapter;
  26 using device::BluetoothAdapterFactory;
  27 using device::BluetoothDevice;
  28 using message_center::Notification;
  29
  30 namespace {
  31
  32 // Identifier for the discoverable notification.
  33 const char kBluetoothDeviceDiscoverableNotificationId[] =
  34     "chrome://settings/bluetooth/discoverable";
  35
  36 // Identifier for the pairing notification; the Bluetooth code ensures we
  37 // only receive one pairing request at a time, so a single id is sufficient and
  38 // means we "update" one notification if not handled rather than continually
  39 // bugging the user.
  40 const char kBluetoothDevicePairingNotificationId[] =
  41     "chrome://settings/bluetooth/pairing";
  42
  43 // Identifier for the notification that a device has been paired with the
  44 // system.
  45 const char kBluetoothDevicePairedNotificationId[] =
  46     "chrome://settings/bluetooth/paired";
  47
  48 // The BluetoothPairingNotificationDelegate handles user interaction with the
  49 // pairing notification and sending the confirmation, rejection or cancellation
  50 // back to the underlying device.
  51 class BluetoothPairingNotificationDelegate
  52     : public message_center::NotificationDelegate {
  53  public:
  54   BluetoothPairingNotificationDelegate(scoped_refptr<BluetoothAdapter> adapter,
  55                                        const std::string& address);
  56
  57  protected:
  58   ~BluetoothPairingNotificationDelegate() override;
  59
  60   // message_center::NotificationDelegate overrides.
  61   void Close(bool by_user) override;
  62   void ButtonClick(int button_index) override;
  63
  64  private:
  65   // Buttons that appear in notifications.
  66   enum Button {
  67     BUTTON_ACCEPT,
  68     BUTTON_REJECT
  69   };
  70
  71   // Reference to the underlying Bluetooth Adapter, holding onto this
  72   // reference ensures the adapter object doesn't go out of scope while we have
  73   // a pending request and user interaction.
  74   scoped_refptr<BluetoothAdapter> adapter_;
  75
  76   // Address of the device being paired.
  77   const std::string address_;
  78
  79   DISALLOW_COPY_AND_ASSIGN(BluetoothPairingNotificationDelegate);
  80 };
  81
  82 BluetoothPairingNotificationDelegate::BluetoothPairingNotificationDelegate(
  83     scoped_refptr<BluetoothAdapter> adapter,
  84     const std::string& address)
  85     : adapter_(adapter),
  86       address_(address) {
  87 }
  88
  89 BluetoothPairingNotificationDelegate::~BluetoothPairingNotificationDelegate() {
  90 }
  91
  92 void BluetoothPairingNotificationDelegate::Close(bool by_user) {
  93   VLOG(1) << "Pairing notification closed. by_user = " << by_user;
  94   // Ignore notification closes generated as a result of pairing completion.
  95   if (!by_user)
  96     return;
  97
  98   // Cancel the pairing of the device, if the object still exists.
  99   BluetoothDevice* device = adapter_->GetDevice(address_);
 100   if (device)
 101     device->CancelPairing();
 102 }
 103
 104 void BluetoothPairingNotificationDelegate::ButtonClick(int button_index) {
 105   VLOG(1) << "Pairing notification, button click: " << button_index;
 106   // If the device object still exists, send the appropriate response either
 107   // confirming or rejecting the pairing.
 108   BluetoothDevice* device = adapter_->GetDevice(address_);
 109   if (device) {
 110     switch (button_index) {
 111       case BUTTON_ACCEPT:
 112         device->ConfirmPairing();
 113         break;
 114       case BUTTON_REJECT:
 115         device->RejectPairing();
 116         break;
 117     }
 118   }
 119
 120   // In any case, remove this pairing notification.
 121   message_center::MessageCenter::Get()->RemoveNotification(
 122       kBluetoothDevicePairingNotificationId, false /* by_user */);
 123 }
 124
 125 }  // namespace
 126
 127
 128 namespace ash {
 129
 130 BluetoothNotificationController::BluetoothNotificationController()
 131     : weak_ptr_factory_(this) {
 132   BluetoothAdapterFactory::GetAdapter(
 133       base::Bind(&BluetoothNotificationController::OnGetAdapter,
 134                  weak_ptr_factory_.GetWeakPtr()));
 135 }
 136
 137 BluetoothNotificationController::~BluetoothNotificationController() {
 138   if (adapter_.get()) {
 139     adapter_->RemoveObserver(this);
 140     adapter_->RemovePairingDelegate(this);
 141     adapter_ = NULL;
 142   }
 143 }
 144
 145
 146 void BluetoothNotificationController::AdapterDiscoverableChanged(
 147     BluetoothAdapter* adapter,
 148     bool discoverable) {
 149   if (discoverable) {
 150     NotifyAdapterDiscoverable();
 151   } else {
 152     // Clear any previous discoverable notification.
 153     message_center::MessageCenter::Get()->RemoveNotification(
 154         kBluetoothDeviceDiscoverableNotificationId, false /* by_user */);
 155   }
 156 }
 157
 158 void BluetoothNotificationController::DeviceAdded(BluetoothAdapter* adapter,
 159                                                   BluetoothDevice* device) {
 160   // Add the new device to the list of currently paired devices; it doesn't
 161   // receive a notification since it's assumed it was previously notified.
 162   if (device->IsPaired())
 163     paired_devices_.insert(device->GetAddress());
 164 }
 165
 166 void BluetoothNotificationController::DeviceChanged(BluetoothAdapter* adapter,
 167                                                     BluetoothDevice* device) {
 168   // If the device is already in the list of paired devices, then don't
 169   // notify.
 170   if (paired_devices_.find(device->GetAddress()) != paired_devices_.end())
 171     return;
 172
 173   // Otherwise if it's marked as paired then it must be newly paired, so
 174   // notify the user about that.
 175   if (device->IsPaired()) {
 176     paired_devices_.insert(device->GetAddress());
 177     NotifyPairedDevice(device);
 178   }
 179 }
 180
 181 void BluetoothNotificationController::DeviceRemoved(BluetoothAdapter* adapter,
 182                                                     BluetoothDevice* device) {
 183   paired_devices_.erase(device->GetAddress());
 184 }
 185
 186
 187 void BluetoothNotificationController::RequestPinCode(BluetoothDevice* device) {
 188   // Cannot provide keyboard entry in a notification; these devices (old car
 189   // audio systems for the most part) will need pairing to be initiated from
 190   // the Chromebook.
 191   device->CancelPairing();
 192 }
 193
 194 void BluetoothNotificationController::RequestPasskey(BluetoothDevice* device) {
 195   // Cannot provide keyboard entry in a notification; fortunately the spec
 196   // doesn't allow for this to be an option when we're receiving the pairing
 197   // request anyway.
 198   device->CancelPairing();
 199 }
 200
 201 void BluetoothNotificationController::DisplayPinCode(
 202     BluetoothDevice* device,
 203     const std::string& pincode) {
 204   base::string16 message = l10n_util::GetStringFUTF16(
 205           IDS_ASH_STATUS_TRAY_BLUETOOTH_DISPLAY_PINCODE,
 206           device->GetName(), base::UTF8ToUTF16(pincode));
 207
 208   NotifyPairing(device, message, false);
 209 }
 210
 211 void BluetoothNotificationController::DisplayPasskey(BluetoothDevice* device,
 212                                                      uint32 passkey) {
 213   base::string16 message = l10n_util::GetStringFUTF16(
 214           IDS_ASH_STATUS_TRAY_BLUETOOTH_DISPLAY_PASSKEY,
 215           device->GetName(), base::UTF8ToUTF16(
 216               base::StringPrintf("%06i", passkey)));
 217
 218   NotifyPairing(device, message, false);
 219 }
 220
 221 void BluetoothNotificationController::KeysEntered(BluetoothDevice* device,
 222                                                   uint32 entered) {
 223   // Ignored since we don't have CSS in the notification to update.
 224 }
 225
 226 void BluetoothNotificationController::ConfirmPasskey(BluetoothDevice* device,
 227                                                      uint32 passkey) {
 228   base::string16 message = l10n_util::GetStringFUTF16(
 229           IDS_ASH_STATUS_TRAY_BLUETOOTH_CONFIRM_PASSKEY,
 230           device->GetName(), base::UTF8ToUTF16(
 231               base::StringPrintf("%06i", passkey)));
 232
 233   NotifyPairing(device, message, true);
 234 }
 235
 236 void BluetoothNotificationController::AuthorizePairing(
 237     BluetoothDevice* device) {
 238   base::string16 message = l10n_util::GetStringFUTF16(
 239           IDS_ASH_STATUS_TRAY_BLUETOOTH_AUTHORIZE_PAIRING,
 240           device->GetName());
 241
 242   NotifyPairing(device, message, true);
 243 }
 244
 245
 246 void BluetoothNotificationController::OnGetAdapter(
 247     scoped_refptr<BluetoothAdapter> adapter) {
 248   DCHECK(!adapter_.get());
 249   adapter_ = adapter;
 250   adapter_->AddObserver(this);
 251   adapter_->AddPairingDelegate(this,
 252                                BluetoothAdapter::PAIRING_DELEGATE_PRIORITY_LOW);
 253
 254   // Notify a user if the adapter is already in the discoverable state.
 255   if (adapter_->IsDiscoverable())
 256     NotifyAdapterDiscoverable();
 257
 258   // Build a list of the currently paired devices; these don't receive
 259   // notifications since it's assumed they were previously notified.
 260   BluetoothAdapter::DeviceList devices = adapter_->GetDevices();
 261   for (BluetoothAdapter::DeviceList::const_iterator iter = devices.begin();
 262        iter != devices.end(); ++iter) {
 263     const BluetoothDevice* device = *iter;
 264     if (device->IsPaired())
 265       paired_devices_.insert(device->GetAddress());
 266   }
 267 }
 268
 269
 270 void BluetoothNotificationController::NotifyAdapterDiscoverable() {
 271   message_center::RichNotificationData optional;
 272
 273   ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
 274
 275   scoped_ptr<Notification> notification(new Notification(
 276       message_center::NOTIFICATION_TYPE_SIMPLE,
 277       kBluetoothDeviceDiscoverableNotificationId, base::string16() /* title */,
 278       l10n_util::GetStringFUTF16(IDS_ASH_STATUS_TRAY_BLUETOOTH_DISCOVERABLE,
 279                                  base::UTF8ToUTF16(adapter_->GetName()),
 280                                  base::UTF8ToUTF16(adapter_->GetAddress())),
 281       bundle.GetImageNamed(IDR_AURA_NOTIFICATION_BLUETOOTH),
 282       base::string16() /* display source */, GURL(),
 283       message_center::NotifierId(message_center::NotifierId::SYSTEM_COMPONENT,
 284                                  system_notifier::kNotifierBluetooth),
 285       optional, NULL));
 286   message_center::MessageCenter::Get()->AddNotification(notification.Pass());
 287 }
 288
 289 void BluetoothNotificationController::NotifyPairing(
 290     BluetoothDevice* device,
 291     const base::string16& message,
 292     bool with_buttons) {
 293   message_center::RichNotificationData optional;
 294   if (with_buttons) {
 295     optional.buttons.push_back(message_center::ButtonInfo(
 296         l10n_util::GetStringUTF16(
 297             IDS_ASH_STATUS_TRAY_BLUETOOTH_ACCEPT)));
 298     optional.buttons.push_back(message_center::ButtonInfo(
 299         l10n_util::GetStringUTF16(
 300             IDS_ASH_STATUS_TRAY_BLUETOOTH_REJECT)));
 301   }
 302
 303   ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
 304
 305   scoped_ptr<Notification> notification(new Notification(
 306       message_center::NOTIFICATION_TYPE_SIMPLE,
 307       kBluetoothDevicePairingNotificationId, base::string16() /* title */,
 308       message, bundle.GetImageNamed(IDR_AURA_NOTIFICATION_BLUETOOTH),
 309       base::string16() /* display source */, GURL(),
 310       message_center::NotifierId(message_center::NotifierId::SYSTEM_COMPONENT,
 311                                  system_notifier::kNotifierBluetooth),
 312       optional, new BluetoothPairingNotificationDelegate(
 313                     adapter_, device->GetAddress())));
 314   message_center::MessageCenter::Get()->AddNotification(notification.Pass());
 315 }
 316
 317 void BluetoothNotificationController::NotifyPairedDevice(
 318     BluetoothDevice* device) {
 319   // Remove the currently presented pairing notification; since only one
 320   // pairing request is queued at a time, this is guaranteed to be the device
 321   // that just became paired.
 322   message_center::MessageCenter::Get()->RemoveNotification(
 323       kBluetoothDevicePairingNotificationId, false /* by_user */);
 324
 325   message_center::RichNotificationData optional;
 326
 327   ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
 328
 329   scoped_ptr<Notification> notification(new Notification(
 330       message_center::NOTIFICATION_TYPE_SIMPLE,
 331       kBluetoothDevicePairedNotificationId, base::string16() /* title */,
 332       l10n_util::GetStringFUTF16(IDS_ASH_STATUS_TRAY_BLUETOOTH_PAIRED,
 333                                  device->GetName()),
 334       bundle.GetImageNamed(IDR_AURA_NOTIFICATION_BLUETOOTH),
 335       base::string16() /* display source */, GURL(),
 336       message_center::NotifierId(message_center::NotifierId::SYSTEM_COMPONENT,
 337                                  system_notifier::kNotifierBluetooth),
 338       optional, NULL));
 339   message_center::MessageCenter::Get()->AddNotification(notification.Pass());
 340 }
 341
 342 }  // namespace ash