src/chrome/browser/ui/webui/chromeos/login/hid_detection_screen_handler.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 CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_HID_DETECTION_SCREEN_HANDLER_H_
   6 #define CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_HID_DETECTION_SCREEN_HANDLER_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/compiler_specific.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "base/memory/weak_ptr.h"
  14 #include "base/prefs/pref_registry_simple.h"
  15 #include "base/values.h"
  16 #include "chrome/browser/chromeos/device/input_service_proxy.h"
  17 #include "chrome/browser/chromeos/login/screens/hid_detection_screen_actor.h"
  18 #include "chrome/browser/ui/webui/chromeos/login/base_screen_handler.h"
  19 #include "content/public/browser/web_ui.h"
  20 #include "device/bluetooth/bluetooth_adapter.h"
  21 #include "device/bluetooth/bluetooth_device.h"
  22 #include "device/bluetooth/bluetooth_discovery_session.h"
  23
  24 namespace base {
  25 class DictionaryValue;
  26 }
  27
  28 namespace chromeos {
  29
  30 class CoreOobeActor;
  31
  32 // WebUI implementation of HIDDetectionScreenActor.
  33 class HIDDetectionScreenHandler
  34     : public HIDDetectionScreenActor,
  35       public BaseScreenHandler,
  36       public device::BluetoothAdapter::Observer,
  37       public device::BluetoothDevice::PairingDelegate,
  38       public InputServiceProxy::Observer {
  39  public:
  40   typedef device::InputServiceLinux::InputDeviceInfo InputDeviceInfo;
  41
  42   explicit HIDDetectionScreenHandler(CoreOobeActor* core_oobe_actor);
  43   virtual ~HIDDetectionScreenHandler();
  44
  45   // HIDDetectionScreenActor implementation:
  46   virtual void Show() override;
  47   virtual void Hide() override;
  48   virtual void SetDelegate(Delegate* delegate) override;
  49   virtual void CheckIsScreenRequired(
  50       const base::Callback<void(bool)>& on_check_done) override;
  51
  52   // BaseScreenHandler implementation:
  53   virtual void DeclareLocalizedValues(LocalizedValuesBuilder* builder) override;
  54   virtual void Initialize() override;
  55
  56   // WebUIMessageHandler implementation:
  57   virtual void RegisterMessages() override;
  58
  59   // device::BluetoothDevice::PairingDelegate implementation:
  60   virtual void RequestPinCode(device::BluetoothDevice* device) override;
  61   virtual void RequestPasskey(device::BluetoothDevice* device) override;
  62   virtual void DisplayPinCode(device::BluetoothDevice* device,
  63                               const std::string& pincode) override;
  64   virtual void DisplayPasskey(
  65       device::BluetoothDevice* device, uint32 passkey) override;
  66   virtual void KeysEntered(device::BluetoothDevice* device,
  67                            uint32 entered) override;
  68   virtual void ConfirmPasskey(
  69       device::BluetoothDevice* device, uint32 passkey) override;
  70   virtual void AuthorizePairing(device::BluetoothDevice* device) override;
  71
  72   // device::BluetoothAdapter::Observer implementation.
  73   virtual void AdapterPresentChanged(device::BluetoothAdapter* adapter,
  74                                      bool present) override;
  75   virtual void DeviceAdded(device::BluetoothAdapter* adapter,
  76                            device::BluetoothDevice* device) override;
  77   virtual void DeviceChanged(device::BluetoothAdapter* adapter,
  78                              device::BluetoothDevice* device) override;
  79   virtual void DeviceRemoved(device::BluetoothAdapter* adapter,
  80                              device::BluetoothDevice* device) override;
  81
  82   // InputServiceProxy::Observer implementation.
  83   virtual void OnInputDeviceAdded(const InputDeviceInfo& info) override;
  84   virtual void OnInputDeviceRemoved(const std::string& id) override;
  85
  86   // Registers the preference for derelict state.
  87   static void RegisterPrefs(PrefRegistrySimple* registry);
  88
  89  private:
  90   // Types of dialog leaving scenarios for UMA metric.
  91   enum ContinueScenarioType {
  92     // Only pointing device detected, user pressed 'Continue'.
  93     POINTING_DEVICE_ONLY_DETECTED,
  94
  95     // Only keyboard detected, user pressed 'Continue'.
  96     KEYBOARD_DEVICE_ONLY_DETECTED,
  97
  98     // All devices detected.
  99     All_DEVICES_DETECTED,
 100
 101     // Must be last enum element.
 102     CONTINUE_SCENARIO_TYPE_SIZE
 103   };
 104
 105   void InitializeAdapter(scoped_refptr<device::BluetoothAdapter> adapter);
 106
 107   // Sends a notification to the Web UI of the status of available Bluetooth/USB
 108   // pointing device.
 109   void SendPointingDeviceNotification();
 110
 111   // Sends a notification to the Web UI of the status of available Bluetooth/USB
 112   // keyboard device.
 113   void SendKeyboardDeviceNotification(base::DictionaryValue* params);
 114
 115   // Updates internal state and UI (if ready) using list of connected devices.
 116   void ProcessConnectedDevicesList(const std::vector<InputDeviceInfo>& devices);
 117
 118   // Checks for lack of mouse or keyboard. If found starts BT devices update.
 119   // Initiates BTAdapter if it's not active and BT devices update required.
 120   void TryInitiateBTDevicesUpdate();
 121
 122   // Processes list of input devices returned by InputServiceProxy on the check
 123   // request. Calls the callback that expects true if screen is required.
 124   void OnGetInputDevicesListForCheck(
 125       const base::Callback<void(bool)>& on_check_done,
 126       const std::vector<InputDeviceInfo>& devices);
 127
 128   // Processes list of input devices returned by InputServiceProxy on regular
 129   // request.
 130   void OnGetInputDevicesList(const std::vector<InputDeviceInfo>& devices);
 131
 132   void StartBTDiscoverySession();
 133
 134   // Called by device::BluetoothDevice on a successful pairing and connection
 135   // to a device.
 136   void BTConnected(device::BluetoothDevice::DeviceType device_type);
 137
 138   // Called by device::BluetoothDevice in response to a failure to
 139   // connect to the device with bluetooth address |address| due to an error
 140   // encoded in |error_code|.
 141   void BTConnectError(const std::string& address,
 142                       device::BluetoothDevice::DeviceType device_type,
 143                       device::BluetoothDevice::ConnectErrorCode error_code);
 144
 145   // JS messages handlers.
 146   void HandleOnContinue();
 147
 148   Delegate* delegate_;
 149
 150   CoreOobeActor* core_oobe_actor_;
 151
 152   // Keeps whether screen should be shown right after initialization.
 153   bool show_on_init_;
 154
 155   // Displays in the UI a connecting to the device |device| message.
 156   void DeviceConnecting(device::BluetoothDevice* device);
 157
 158   // Called by device::BluetoothAdapter in response to a successful request
 159   // to initiate a discovery session.
 160   void OnStartDiscoverySession(
 161       scoped_ptr<device::BluetoothDiscoverySession> discovery_session);
 162
 163   // Called by device::BluetoothAdapter in response to a failure to
 164   // initiate a discovery session.
 165   void FindDevicesError();
 166
 167   // Called by device::BluetoothAdapter in response to a failure to
 168   // power BT adapter.
 169   void SetPoweredError();
 170
 171   // Called by device::BluetoothAdapter in response to a failure to
 172   // power off BT adapter.
 173   void SetPoweredOffError();
 174
 175   // Called for revision of active devices. If current-placement is available
 176   // for mouse or keyboard device, sets one of active devices as current or
 177   // tries to connect some BT device if no appropriate devices are connected.
 178   void UpdateDevices();
 179
 180   // Tries to connect some BT devices if no type-appropriate devices are
 181   // connected.
 182   void UpdateBTDevices();
 183
 184   // Tries to connect given BT device.
 185   void ConnectBTDevice(device::BluetoothDevice* device);
 186
 187   // Tries to connect given BT device as pointing one.
 188   void TryPairingAsPointingDevice(device::BluetoothDevice* device);
 189
 190   // Tries to connect given BT device as keyboard.
 191   void TryPairingAsKeyboardDevice(device::BluetoothDevice* device);
 192
 193   // Default bluetooth adapter, used for all operations.
 194   scoped_refptr<device::BluetoothAdapter> adapter_;
 195
 196   InputServiceProxy input_service_proxy_;
 197
 198   // The current device discovery session. Only one active discovery session is
 199   // kept at a time and the instance that |discovery_session_| points to gets
 200   // replaced by a new one when a new discovery session is initiated.
 201   scoped_ptr<device::BluetoothDiscoverySession> discovery_session_;
 202
 203   // Current pointing device, if any.
 204   std::string pointing_device_name_;
 205   std::string pointing_device_id_;
 206   bool mouse_is_pairing_;
 207   InputDeviceInfo::Type pointing_device_connect_type_;
 208
 209   // Current keyboard device, if any.
 210   std::string keyboard_device_name_;
 211   std::string keyboard_device_id_;
 212   bool keyboard_is_pairing_;
 213   InputDeviceInfo::Type keyboard_device_connect_type_;
 214
 215   bool switch_on_adapter_when_ready_;
 216
 217   // State of BT adapter before screen-initiated changes.
 218   scoped_ptr<bool> adapter_initially_powered_;
 219
 220   base::WeakPtrFactory<HIDDetectionScreenHandler> weak_ptr_factory_;
 221
 222   DISALLOW_COPY_AND_ASSIGN(HIDDetectionScreenHandler);
 223 };
 224
 225 }  // namespace chromeos
 226
 227 #endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_HID_DETECTION_SCREEN_HANDLER_H_
 228