Revert of HID-detection screen moved to screenContext.

chrome/browser/ui/webui/chromeos/login/hid_detection_screen_handler.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/webui/chromeos/login/hid_detection_screen_handler.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
+#include "base/metrics/histogram.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/string16.h"
+#include "base/strings/string_number_conversions.h"
+#include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
-#include "chrome/browser/chromeos/login/screens/hid_detection_model.h"
 #include "chrome/browser/ui/webui/chromeos/login/oobe_ui.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/grit/generated_resources.h"
 #include "chromeos/chromeos_switches.h"
 #include "components/login/localized_values_builder.h"
+#include "device/bluetooth/bluetooth_adapter_factory.h"
+#include "ui/base/l10n/l10n_util.h"
 
 namespace {
 
 const char kJsScreenPath[] = "login.HIDDetectionScreen";
 
+// Variants of pairing state.
+const char kRemotePinCode[] = "bluetoothRemotePinCode";
+const char kRemotePasskey[] = "bluetoothRemotePasskey";
+
+// Possible ui-states for device-blocks. Same as CONNECTION dict of
+// HIDDetectionScreen
+const char kSearchingState[] = "searching";
+const char kUSBConnectedState[] = "connected";
+const char kBTPairedState[] = "paired";
+const char kBTPairingState[] = "pairing";
+// Special state for notifications that doesn't switch ui-state, but adds info.
+const char kBTUpdateState[] = "update";
+
+// Names of possible arguments used for ui update.
+const char kPincodeArgName[] = "pincode";
+const char kDeviceNameArgName[] = "name";
+const char kLabelArgName[] = "keyboard-label";
+
+// Standard length of pincode for pairing BT keyboards.
+const int kPincodeLength = 6;
+
+bool DeviceIsPointing(device::BluetoothDevice::DeviceType device_type) {
+  return device_type == device::BluetoothDevice::DEVICE_MOUSE ||
+         device_type == device::BluetoothDevice::DEVICE_KEYBOARD_MOUSE_COMBO ||
+         device_type == device::BluetoothDevice::DEVICE_TABLET;
+}
+
+bool DeviceIsPointing(const device::InputServiceLinux::InputDeviceInfo& info) {
+  return info.is_mouse || info.is_touchpad || info.is_touchscreen ||
+         info.is_tablet;
+}
+
+bool DeviceIsKeyboard(device::BluetoothDevice::DeviceType device_type) {
+  return device_type == device::BluetoothDevice::DEVICE_KEYBOARD ||
+         device_type == device::BluetoothDevice::DEVICE_KEYBOARD_MOUSE_COMBO;
+}
+
+bool DeviceIsKeyboard(const device::InputServiceLinux::InputDeviceInfo& info) {
+  return info.is_keyboard || info.is_touchscreen || info.is_tablet;
+}
+
 }  // namespace
 
 namespace chromeos {
 
 HIDDetectionScreenHandler::HIDDetectionScreenHandler(
     CoreOobeActor* core_oobe_actor)
     : BaseScreenHandler(kJsScreenPath),
-      model_(NULL),
+      delegate_(NULL),
       core_oobe_actor_(core_oobe_actor),
-      show_on_init_(false) {
-  LOG(ERROR) << "HIDDetectionScreenHandler::HIDDetectionScreenHandler";
+      show_on_init_(false),
+      mouse_is_pairing_(false),
+      pointing_device_connect_type_(InputDeviceInfo::TYPE_UNKNOWN),
+      keyboard_is_pairing_(false),
+      keyboard_device_connect_type_(InputDeviceInfo::TYPE_UNKNOWN),
+      switch_on_adapter_when_ready_(false),
+      weak_ptr_factory_(this) {
 }
 
 HIDDetectionScreenHandler::~HIDDetectionScreenHandler() {
-  if (model_)
-    model_->OnViewDestroyed(this);
+  adapter_initially_powered_.reset();
+  if (adapter_.get())
+    adapter_->RemoveObserver(this);
+  input_service_proxy_.RemoveObserver(this);
+  if (delegate_)
+    delegate_->OnActorDestroyed(this);
+}
+
+void HIDDetectionScreenHandler::OnStartDiscoverySession(
+    scoped_ptr<device::BluetoothDiscoverySession> discovery_session) {
+  VLOG(1) << "BT Discovery session started";
+  discovery_session_ = discovery_session.Pass();
+  UpdateDevices();
+}
+
+void HIDDetectionScreenHandler::SetPoweredError() {
+  LOG(ERROR) << "Failed to power BT adapter";
+}
+
+void HIDDetectionScreenHandler::SetPoweredOffError() {
+  LOG(ERROR) << "Failed to power off BT adapter";
+}
+
+void HIDDetectionScreenHandler::FindDevicesError() {
+  VLOG(1) << "Failed to start Bluetooth discovery.";
 }
 
 void HIDDetectionScreenHandler::Show() {
   if (!page_is_ready()) {
     show_on_init_ = true;
     return;
   }
   core_oobe_actor_->InitDemoModeDetection();
+  input_service_proxy_.AddObserver(this);
+  UpdateDevices();
 
   PrefService* local_state = g_browser_process->local_state();
   int num_of_times_dialog_was_shown = local_state->GetInteger(
       prefs::kTimesHIDDialogShown);
   local_state->SetInteger(prefs::kTimesHIDDialogShown,
                           num_of_times_dialog_was_shown + 1);
 
   ShowScreen(OobeUI::kScreenHIDDetection, NULL);
+  SendPointingDeviceNotification();
+  SendKeyboardDeviceNotification(NULL);
 }
 
 void HIDDetectionScreenHandler::Hide() {
+  if (adapter_.get())
+    adapter_->RemoveObserver(this);
+  input_service_proxy_.RemoveObserver(this);
 }
 
-void HIDDetectionScreenHandler::Bind(HIDDetectionModel& model) {
-  model_ = &model;
-  BaseScreenHandler::SetBaseScreen(model_);
+void HIDDetectionScreenHandler::SetDelegate(Delegate* delegate) {
+  delegate_ = delegate;
   if (page_is_ready())
     Initialize();
 }
 
-void HIDDetectionScreenHandler::Unbind() {
-  model_ = nullptr;
-  BaseScreenHandler::SetBaseScreen(nullptr);
-}
-
-void HIDDetectionScreenHandler::PrepareToShow() {
-}
-
 void HIDDetectionScreenHandler::CheckIsScreenRequired(
-      const base::Callback<void(bool)>& on_check_done) {
-  LOG(ERROR) << "HIDDetectionScreenHandler::CheckIsScreenRequired " << model_;
-  model_->CheckIsScreenRequired(on_check_done);
+    const base::Callback<void(bool)>& on_check_done) {
+  input_service_proxy_.GetDevices(
+      base::Bind(&HIDDetectionScreenHandler::OnGetInputDevicesListForCheck,
+                 weak_ptr_factory_.GetWeakPtr(),
+                 on_check_done));
 }
 
 void HIDDetectionScreenHandler::DeclareLocalizedValues(
     ::login::LocalizedValuesBuilder* builder) {
   builder->Add("hidDetectionContinue", IDS_HID_DETECTION_CONTINUE_BUTTON);
   builder->Add("hidDetectionInvitation", IDS_HID_DETECTION_INVITATION_TEXT);
   builder->Add("hidDetectionPrerequisites",
       IDS_HID_DETECTION_PRECONDITION_TEXT);
   builder->Add("hidDetectionMouseSearching", IDS_HID_DETECTION_SEARCHING_MOUSE);
   builder->Add("hidDetectionKeyboardSearching",
       IDS_HID_DETECTION_SEARCHING_KEYBOARD);
   builder->Add("hidDetectionUSBMouseConnected",
       IDS_HID_DETECTION_CONNECTED_USB_MOUSE);
   builder->Add("hidDetectionUSBKeyboardConnected",
       IDS_HID_DETECTION_CONNECTED_USB_KEYBOARD);
   builder->Add("hidDetectionBTMousePaired",
       IDS_HID_DETECTION_PAIRED_BLUETOOTH_MOUSE);
   builder->Add("hidDetectionBTEnterKey", IDS_HID_DETECTION_BLUETOOTH_ENTER_KEY);
 }
 
-void HIDDetectionScreenHandler::DeclareJSCallbacks() {
-  AddCallback(
-      "HIDDetectionOnContinue", &HIDDetectionScreenHandler::HandleOnContinue);
-}
-
 void HIDDetectionScreenHandler::Initialize() {
+  if (!page_is_ready() || !delegate_)
+    return;
+
+  device::BluetoothAdapterFactory::GetAdapter(
+      base::Bind(&HIDDetectionScreenHandler::InitializeAdapter,
+                 weak_ptr_factory_.GetWeakPtr()));
+
   if (show_on_init_) {
     Show();
     show_on_init_ = false;
   }
 }
 
+void HIDDetectionScreenHandler::RegisterMessages() {
+  AddCallback(
+      "HIDDetectionOnContinue", &HIDDetectionScreenHandler::HandleOnContinue);
+}
+
 void HIDDetectionScreenHandler::HandleOnContinue() {
   // Continue button pressed.
+  ContinueScenarioType scenario_type;
+  if (!pointing_device_id_.empty() && !keyboard_device_id_.empty())
+    scenario_type = All_DEVICES_DETECTED;
+  else if (pointing_device_id_.empty())
+    scenario_type = KEYBOARD_DEVICE_ONLY_DETECTED;
+  else
+    scenario_type = POINTING_DEVICE_ONLY_DETECTED;
+
+  UMA_HISTOGRAM_ENUMERATION(
+      "HIDDetection.OOBEDevicesDetectedOnContinuePressed",
+      scenario_type,
+      CONTINUE_SCENARIO_TYPE_SIZE);
+
+  // Switch off BT adapter if it was off before the screen and no BT device
+  // connected.
+  if (adapter_.get() && adapter_->IsPresent() && adapter_->IsPowered() &&
+      !(pointing_device_connect_type_ == InputDeviceInfo::TYPE_BLUETOOTH ||
+        keyboard_device_connect_type_ == InputDeviceInfo::TYPE_BLUETOOTH) &&
+      adapter_initially_powered_ && !(*adapter_initially_powered_)) {
+    VLOG(1) << "Switching off BT adapter after HID OOBE screen as unused.";
+    adapter_->SetPowered(
+        false,
+        base::Bind(&base::DoNothing),
+        base::Bind(&HIDDetectionScreenHandler::SetPoweredOffError,
+                   weak_ptr_factory_.GetWeakPtr()));
+  }
+
   core_oobe_actor_->StopDemoModeDetection();
-  if (model_)
-    model_->OnContinueButtonClicked();
+  if (delegate_)
+    delegate_->OnExit();
+}
+
+void HIDDetectionScreenHandler::InitializeAdapter(
+    scoped_refptr<device::BluetoothAdapter> adapter) {
+  adapter_ = adapter;
+  CHECK(adapter_.get());
+
+  adapter_->AddObserver(this);
+  UpdateDevices();
+}
+
+void HIDDetectionScreenHandler::StartBTDiscoverySession() {
+  adapter_->StartDiscoverySession(
+      base::Bind(&HIDDetectionScreenHandler::OnStartDiscoverySession,
+                 weak_ptr_factory_.GetWeakPtr()),
+      base::Bind(&HIDDetectionScreenHandler::FindDevicesError,
+                 weak_ptr_factory_.GetWeakPtr()));
+}
+
+void HIDDetectionScreenHandler::RequestPinCode(
+    device::BluetoothDevice* device) {
+  VLOG(1) << "RequestPinCode id = " << device->GetDeviceID()
+          << " name = " << device->GetName();
+  device->CancelPairing();
+}
+
+void HIDDetectionScreenHandler::RequestPasskey(
+    device::BluetoothDevice* device) {
+  VLOG(1) << "RequestPassKey id = " << device->GetDeviceID()
+          << " name = " << device->GetName();
+  device->CancelPairing();
+}
+
+void HIDDetectionScreenHandler::DisplayPinCode(device::BluetoothDevice* device,
+                                               const std::string& pincode) {
+  VLOG(1) << "DisplayPinCode id = " << device->GetDeviceID()
+          << " name = " << device->GetName();
+  base::DictionaryValue params;
+  params.SetString("state", kBTPairingState);
+  params.SetString("pairing-state", kRemotePinCode);
+  params.SetString("pincode", pincode);
+  params.SetString(kDeviceNameArgName, device->GetName());
+  SendKeyboardDeviceNotification(&params);
+}
+
+void HIDDetectionScreenHandler::DisplayPasskey(
+    device::BluetoothDevice* device, uint32 passkey) {
+  VLOG(1) << "DisplayPassKey id = " << device->GetDeviceID()
+          << " name = " << device->GetName();
+  base::DictionaryValue params;
+  params.SetString("state", kBTPairingState);
+  params.SetString("pairing-state", kRemotePasskey);
+  params.SetInteger("passkey", passkey);
+  std::string pincode = base::UintToString(passkey);
+  pincode = std::string(kPincodeLength - pincode.length(), '0').append(pincode);
+  params.SetString("pincode", pincode);
+  params.SetString(kDeviceNameArgName, device->GetName());
+  SendKeyboardDeviceNotification(&params);
+}
+
+void HIDDetectionScreenHandler::KeysEntered(
+    device::BluetoothDevice* device, uint32 entered) {
+  VLOG(1) << "Keys entered";
+  base::DictionaryValue params;
+  params.SetString("state", kBTUpdateState);
+  params.SetInteger("keysEntered", entered);
+  SendKeyboardDeviceNotification(&params);
+}
+
+void HIDDetectionScreenHandler::ConfirmPasskey(
+    device::BluetoothDevice* device, uint32 passkey) {
+  VLOG(1) << "Confirm Passkey";
+  device->CancelPairing();
+}
+
+void HIDDetectionScreenHandler::AuthorizePairing(
+    device::BluetoothDevice* device) {
+  // There is never any circumstance where this will be called, since the
+  // HID detection screen  handler will only be used for outgoing pairing
+  // requests, but play it safe.
+  VLOG(1) << "Authorize pairing";
+  device->ConfirmPairing();
+}
+
+void HIDDetectionScreenHandler::AdapterPresentChanged(
+    device::BluetoothAdapter* adapter, bool present) {
+  if (present && switch_on_adapter_when_ready_) {
+    VLOG(1) << "Switching on BT adapter on HID OOBE screen.";
+    adapter_initially_powered_.reset(new bool(adapter_->IsPowered()));
+    adapter_->SetPowered(
+        true,
+        base::Bind(&HIDDetectionScreenHandler::StartBTDiscoverySession,
+                   weak_ptr_factory_.GetWeakPtr()),
+        base::Bind(&HIDDetectionScreenHandler::SetPoweredError,
+                   weak_ptr_factory_.GetWeakPtr()));
+  }
+}
+
+void HIDDetectionScreenHandler::TryPairingAsPointingDevice(
+    device::BluetoothDevice* device) {
+  if (pointing_device_id_.empty() &&
+      DeviceIsPointing(device->GetDeviceType()) &&
+      device->IsPairable() && !device->IsPaired() && !mouse_is_pairing_) {
+    ConnectBTDevice(device);
+  }
+}
+
+void HIDDetectionScreenHandler::TryPairingAsKeyboardDevice(
+    device::BluetoothDevice* device) {
+  if (keyboard_device_id_.empty() &&
+      DeviceIsKeyboard(device->GetDeviceType()) &&
+      device->IsPairable() && !device->IsPaired() && !keyboard_is_pairing_) {
+    ConnectBTDevice(device);
+  }
+}
+
+void HIDDetectionScreenHandler::DeviceAdded(
+    device::BluetoothAdapter* adapter, device::BluetoothDevice* device) {
+  VLOG(1) << "BT input device added id = " << device->GetDeviceID() <<
+      " name = " << device->GetName();
+  TryPairingAsPointingDevice(device);
+  TryPairingAsKeyboardDevice(device);
+}
+
+void HIDDetectionScreenHandler::DeviceChanged(
+    device::BluetoothAdapter* adapter, device::BluetoothDevice* device) {
+  VLOG(1) << "BT device changed id = " << device->GetDeviceID() << " name = " <<
+      device->GetName();
+  TryPairingAsPointingDevice(device);
+  TryPairingAsKeyboardDevice(device);
+}
+
+void HIDDetectionScreenHandler::DeviceRemoved(
+    device::BluetoothAdapter* adapter, device::BluetoothDevice* device) {
+  VLOG(1) << "BT device removed id = " << device->GetDeviceID() << " name = " <<
+      device->GetName();
+}
+
+void HIDDetectionScreenHandler::OnInputDeviceAdded(
+    const InputDeviceInfo& info) {
+  VLOG(1) << "Input device added id = " << info.id << " name = " << info.name;
+  // TODO(merkulova): deal with all available device types, e.g. joystick.
+  if (!keyboard_device_id_.empty() && !pointing_device_id_.empty())
+    return;
+
+  if (pointing_device_id_.empty() && DeviceIsPointing(info)) {
+    pointing_device_id_ = info.id;
+    pointing_device_name_ = info.name;
+    pointing_device_connect_type_ = info.type;
+    SendPointingDeviceNotification();
+  }
+  if (keyboard_device_id_.empty() && DeviceIsKeyboard(info)) {
+    keyboard_device_id_ = info.id;
+    keyboard_device_name_ = info.name;
+    keyboard_device_connect_type_ = info.type;
+    SendKeyboardDeviceNotification(NULL);
+  }
+}
+
+void HIDDetectionScreenHandler::OnInputDeviceRemoved(const std::string& id) {
+  if (id == keyboard_device_id_) {
+    keyboard_device_id_.clear();
+    keyboard_device_name_.clear();
+    keyboard_device_connect_type_ = InputDeviceInfo::TYPE_UNKNOWN;
+    SendKeyboardDeviceNotification(NULL);
+    UpdateDevices();
+  } else if (id == pointing_device_id_) {
+    pointing_device_id_.clear();
+    pointing_device_name_.clear();
+    pointing_device_connect_type_ = InputDeviceInfo::TYPE_UNKNOWN;
+    SendPointingDeviceNotification();
+    UpdateDevices();
+  }
 }
 
 // static
 void HIDDetectionScreenHandler::RegisterPrefs(PrefRegistrySimple* registry) {
   registry->RegisterIntegerPref(prefs::kTimesHIDDialogShown, 0);
 }
 
+void HIDDetectionScreenHandler::UpdateDevices() {
+  input_service_proxy_.GetDevices(
+      base::Bind(&HIDDetectionScreenHandler::OnGetInputDevicesList,
+                 weak_ptr_factory_.GetWeakPtr()));
+}
+
+void HIDDetectionScreenHandler::UpdateBTDevices() {
+  if (!adapter_.get() || !adapter_->IsPresent() || !adapter_->IsPowered())
+    return;
+
+  // If no connected devices found as pointing device and keyboard, we try to
+  // connect some type-suitable active bluetooth device.
+  std::vector<device::BluetoothDevice*> bt_devices = adapter_->GetDevices();
+  for (std::vector<device::BluetoothDevice*>::const_iterator it =
+           bt_devices.begin();
+       it != bt_devices.end() &&
+           (keyboard_device_id_.empty() || pointing_device_id_.empty());
+       ++it) {
+    TryPairingAsPointingDevice(*it);
+    TryPairingAsKeyboardDevice(*it);
+  }
+}
+
+void HIDDetectionScreenHandler::ProcessConnectedDevicesList(
+    const std::vector<InputDeviceInfo>& devices) {
+  for (std::vector<InputDeviceInfo>::const_iterator it = devices.begin();
+       it != devices.end() &&
+       (pointing_device_id_.empty() || keyboard_device_id_.empty());
+       ++it) {
+    if (pointing_device_id_.empty() && DeviceIsPointing(*it)) {
+      pointing_device_id_ = it->id;
+      pointing_device_name_ = it->name;
+      pointing_device_connect_type_ = it->type;
+      if (page_is_ready())
+        SendPointingDeviceNotification();
+    }
+    if (keyboard_device_id_.empty() && it->is_keyboard) {
+      keyboard_device_id_ = it->id;
+      keyboard_device_name_ = it->name;
+      keyboard_device_connect_type_ = it->type;
+      if (page_is_ready())
+        SendKeyboardDeviceNotification(NULL);
+    }
+  }
+}
+
+void HIDDetectionScreenHandler::TryInitiateBTDevicesUpdate() {
+  if ((pointing_device_id_.empty() || keyboard_device_id_.empty()) &&
+      adapter_.get()) {
+    if (!adapter_->IsPresent()) {
+      // Switch on BT adapter later when it's available.
+      switch_on_adapter_when_ready_ = true;
+    } else if (!adapter_->IsPowered()) {
+      VLOG(1) << "Switching on BT adapter on HID OOBE screen.";
+      adapter_initially_powered_.reset(new bool(false));
+      adapter_->SetPowered(
+          true,
+          base::Bind(&HIDDetectionScreenHandler::StartBTDiscoverySession,
+                     weak_ptr_factory_.GetWeakPtr()),
+          base::Bind(&HIDDetectionScreenHandler::SetPoweredError,
+                     weak_ptr_factory_.GetWeakPtr()));
+    } else {
+      UpdateBTDevices();
+    }
+  }
+}
+
+void HIDDetectionScreenHandler::OnGetInputDevicesListForCheck(
+    const base::Callback<void(bool)>& on_check_done,
+    const std::vector<InputDeviceInfo>& devices) {
+  ProcessConnectedDevicesList(devices);
+
+  // Screen is not required if both devices are present.
+  bool all_devices_autodetected = !pointing_device_id_.empty() &&
+                                  !keyboard_device_id_.empty();
+  UMA_HISTOGRAM_BOOLEAN("HIDDetection.OOBEDialogShown",
+                        !all_devices_autodetected);
+
+  on_check_done.Run(!all_devices_autodetected);
+}
+
+void HIDDetectionScreenHandler::OnGetInputDevicesList(
+    const std::vector<InputDeviceInfo>& devices) {
+  ProcessConnectedDevicesList(devices);
+  TryInitiateBTDevicesUpdate();
+}
+
+void HIDDetectionScreenHandler::ConnectBTDevice(
+    device::BluetoothDevice* device) {
+  if (!device->IsPairable() || device->IsPaired())
+    return;
+  device::BluetoothDevice::DeviceType device_type = device->GetDeviceType();
+
+  if (device_type == device::BluetoothDevice::DEVICE_MOUSE ||
+      device_type == device::BluetoothDevice::DEVICE_TABLET) {
+    if (mouse_is_pairing_)
+      return;
+    mouse_is_pairing_ = true;
+  } else if (device_type == device::BluetoothDevice::DEVICE_KEYBOARD) {
+    if (keyboard_is_pairing_)
+      return;
+    keyboard_is_pairing_ = true;
+  } else if (device_type ==
+      device::BluetoothDevice::DEVICE_KEYBOARD_MOUSE_COMBO) {
+    if (mouse_is_pairing_ || keyboard_is_pairing_)
+      return;
+    mouse_is_pairing_ = true;
+    keyboard_is_pairing_ = true;
+  }
+  device->Connect(this,
+            base::Bind(&HIDDetectionScreenHandler::BTConnected,
+                       weak_ptr_factory_.GetWeakPtr(), device_type),
+            base::Bind(&HIDDetectionScreenHandler::BTConnectError,
+                       weak_ptr_factory_.GetWeakPtr(),
+                       device->GetAddress(), device_type));
+}
+
+void HIDDetectionScreenHandler::BTConnected(
+    device::BluetoothDevice::DeviceType device_type) {
+  if (DeviceIsPointing(device_type))
+    mouse_is_pairing_ = false;
+  if (DeviceIsKeyboard(device_type))
+    keyboard_is_pairing_ = false;
+}
+
+void HIDDetectionScreenHandler::BTConnectError(
+    const std::string& address,
+    device::BluetoothDevice::DeviceType device_type,
+    device::BluetoothDevice::ConnectErrorCode error_code) {
+  LOG(WARNING) << "BTConnectError while connecting " << address
+               << " error code = " << error_code;
+  if (DeviceIsPointing(device_type))
+    mouse_is_pairing_ = false;
+  if (DeviceIsKeyboard(device_type)) {
+    keyboard_is_pairing_ = false;
+    SendKeyboardDeviceNotification(NULL);
+  }
+
+  if (pointing_device_id_.empty() || keyboard_device_id_.empty())
+    UpdateDevices();
+}
+
+
+void HIDDetectionScreenHandler::SendPointingDeviceNotification() {
+  std::string state;
+  if (pointing_device_id_.empty())
+    state = kSearchingState;
+  else if (pointing_device_connect_type_ == InputDeviceInfo::TYPE_BLUETOOTH)
+    state = kBTPairedState;
+  else
+    state = kUSBConnectedState;
+  CallJS("setPointingDeviceState", state);
+}
+
+void HIDDetectionScreenHandler::SendKeyboardDeviceNotification(
+    base::DictionaryValue* params) {
+  base::DictionaryValue state_info;
+  if (params)
+    state_info.MergeDictionary(params);
+
+  base::string16 device_name;
+  if (!state_info.GetString(kDeviceNameArgName, &device_name)) {
+    device_name = l10n_util::GetStringUTF16(
+        IDS_HID_DETECTION_DEFAULT_KEYBOARD_NAME);
+  }
+
+  if (keyboard_device_id_.empty()) {
+    if (!state_info.HasKey("state")) {
+      state_info.SetString("state", kSearchingState);
+    } else if (state_info.HasKey(kPincodeArgName)) {
+      state_info.SetString(
+          kLabelArgName,
+          l10n_util::GetStringFUTF16(
+              IDS_HID_DETECTION_BLUETOOTH_REMOTE_PIN_CODE_REQUEST,
+              device_name));
+    }
+  } else if (keyboard_device_connect_type_ == InputDeviceInfo::TYPE_BLUETOOTH) {
+    state_info.SetString("state", kBTPairedState);
+    state_info.SetString(
+        kLabelArgName,
+        l10n_util::GetStringFUTF16(
+            IDS_HID_DETECTION_PAIRED_BLUETOOTH_KEYBOARD,
+            base::UTF8ToUTF16(keyboard_device_name_)));
+  } else {
+    state_info.SetString("state", kUSBConnectedState);
+  }
+  CallJS("setKeyboardDeviceState", state_info);
+}
+
 }  // namespace chromeos