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
  50   // BaseScreenHandler implementation:
  51   virtual void DeclareLocalizedValues(LocalizedValuesBuilder* builder) OVERRIDE;
  52   virtual void Initialize() OVERRIDE;
  53
  54   // WebUIMessageHandler implementation:
  55   virtual void RegisterMessages() OVERRIDE;
  56
  57   // device::BluetoothDevice::PairingDelegate implementation:
  58   virtual void RequestPinCode(device::BluetoothDevice* device) OVERRIDE;
  59   virtual void RequestPasskey(device::BluetoothDevice* device) OVERRIDE;
  60   virtual void DisplayPinCode(device::BluetoothDevice* device,
  61                               const std::string& pincode) OVERRIDE;
  62   virtual void DisplayPasskey(
  63       device::BluetoothDevice* device, uint32 passkey) OVERRIDE;
  64   virtual void KeysEntered(device::BluetoothDevice* device,
  65                            uint32 entered) OVERRIDE;
  66   virtual void ConfirmPasskey(
  67       device::BluetoothDevice* device, uint32 passkey) OVERRIDE;
  68   virtual void AuthorizePairing(device::BluetoothDevice* device) OVERRIDE;
  69
  70   // device::BluetoothAdapter::Observer implementation.
  71   virtual void AdapterPresentChanged(device::BluetoothAdapter* adapter,
  72                                      bool present) OVERRIDE;
  73   virtual void DeviceAdded(device::BluetoothAdapter* adapter,
  74                            device::BluetoothDevice* device) OVERRIDE;
  75   virtual void DeviceChanged(device::BluetoothAdapter* adapter,
  76                              device::BluetoothDevice* device) OVERRIDE;
  77   virtual void DeviceRemoved(device::BluetoothAdapter* adapter,
  78                              device::BluetoothDevice* device) OVERRIDE;
  79
  80   // InputServiceProxy::Observer implementation.
  81   virtual void OnInputDeviceAdded(const InputDeviceInfo& info) OVERRIDE;
  82   virtual void OnInputDeviceRemoved(const std::string& id) OVERRIDE;
  83
  84   // Registers the preference for derelict state.
  85   static void RegisterPrefs(PrefRegistrySimple* registry);
  86
  87  private:
  88   // Types of dialog leaving scenarios for UMA metric.
  89   enum ContinueScenarioType {
  90     // Only pointing device detected, user pressed 'Continue'.
  91     POINTING_DEVICE_ONLY_DETECTED,
  92
  93     // Only keyboard detected, user pressed 'Continue'.
  94     KEYBOARD_DEVICE_ONLY_DETECTED,
  95
  96     // All devices detected.
  97     All_DEVICES_DETECTED,
  98
  99     // Must be last enum element.
 100     CONTINUE_SCENARIO_TYPE_SIZE
 101   };
 102
 103   void InitializeAdapter(scoped_refptr<device::BluetoothAdapter> adapter);
 104
 105   // Sends a notification to the Web UI of the status of available Bluetooth/USB
 106   // pointing device.
 107   void SendPointingDeviceNotification();
 108
 109   // Sends a notification to the Web UI of the status of available Bluetooth/USB
 110   // keyboard device.
 111   void SendKeyboardDeviceNotification(base::DictionaryValue* params);
 112
 113   // Updates internal state and UI using list of connected devices.
 114   void ProcessConnectedDevicesList(const std::vector<InputDeviceInfo>& devices);
 115
 116   // Checks for lack of mouse or keyboard. If found starts BT devices update.
 117   // Initiates BTAdapter if it's not active and BT devices update required.
 118   void TryInitiateBTDevicesUpdate();
 119
 120   // Processes list of input devices returned by InputServiceProxy on the first
 121   // time the screen is initiated. Skips the screen if all required devices are
 122   // present.
 123   void OnGetInputDevicesListFirstTime(
 124       const std::vector<InputDeviceInfo>& devices);
 125
 126   // Processes list of input devices returned by InputServiceProxy on regular
 127   // request.
 128   void OnGetInputDevicesList(const std::vector<InputDeviceInfo>& devices);
 129
 130   void StartBTDiscoverySession();
 131
 132   // Called by device::BluetoothDevice on a successful pairing and connection
 133   // to a device.
 134   void BTConnected(device::BluetoothDevice::DeviceType device_type);
 135
 136   // Called by device::BluetoothDevice in response to a failure to
 137   // connect to the device with bluetooth address |address| due to an error
 138   // encoded in |error_code|.
 139   void BTConnectError(const std::string& address,
 140                       device::BluetoothDevice::DeviceType device_type,
 141                       device::BluetoothDevice::ConnectErrorCode error_code);
 142
 143   // JS messages handlers.
 144   void HandleOnContinue();
 145
 146   Delegate* delegate_;
 147
 148   CoreOobeActor* core_oobe_actor_;
 149
 150   // Keeps whether screen should be shown right after initialization.
 151   bool show_on_init_;
 152
 153   // Displays in the UI a connecting to the device |device| message.
 154   void DeviceConnecting(device::BluetoothDevice* device);
 155
 156   // Called by device::BluetoothAdapter in response to a successful request
 157   // to initiate a discovery session.
 158   void OnStartDiscoverySession(
 159       scoped_ptr<device::BluetoothDiscoverySession> discovery_session);
 160
 161   // Called by device::BluetoothAdapter in response to a failure to
 162   // initiate a discovery session.
 163   void FindDevicesError();
 164
 165   // Called by device::BluetoothAdapter in response to a failure to
 166   // power BT adapter.
 167   void SetPoweredError();
 168
 169   // Special case uf UpdateDevice. Called on first show, skips the dialog if
 170   // all necessary devices (mouse and keyboard) already connected.
 171   void GetDevicesFirstTime();
 172
 173   // Called for revision of active devices. If current-placement is available
 174   // for mouse or keyboard device, sets one of active devices as current or
 175   // tries to connect some BT device if no appropriate devices are connected.
 176   void UpdateDevices();
 177
 178   // Tries to connect some BT devices if no type-appropriate devices are
 179   // connected.
 180   void UpdateBTDevices();
 181
 182   // Tries to connect given BT device.
 183   void ConnectBTDevice(device::BluetoothDevice* device);
 184
 185   // Tries to connect given BT device as pointing one.
 186   void TryPairingAsPointingDevice(device::BluetoothDevice* device);
 187
 188   // Tries to connect given BT device as keyboard.
 189   void TryPairingAsKeyboardDevice(device::BluetoothDevice* device);
 190
 191   // Default bluetooth adapter, used for all operations.
 192   scoped_refptr<device::BluetoothAdapter> adapter_;
 193
 194   InputServiceProxy input_service_proxy_;
 195
 196   // The current device discovery session. Only one active discovery session is
 197   // kept at a time and the instance that |discovery_session_| points to gets
 198   // replaced by a new one when a new discovery session is initiated.
 199   scoped_ptr<device::BluetoothDiscoverySession> discovery_session_;
 200
 201   // Current pointing device, if any.
 202   std::string pointing_device_name_;
 203   std::string pointing_device_id_;
 204   bool mouse_is_pairing_;
 205   InputDeviceInfo::Type pointing_device_connect_type_;
 206
 207   // Current keyboard device, if any.
 208   std::string keyboard_device_name_;
 209   std::string keyboard_device_id_;
 210   bool keyboard_is_pairing_;
 211   InputDeviceInfo::Type keyboard_device_connect_type_;
 212
 213   bool switch_on_adapter_when_ready_;
 214
 215   bool first_time_screen_show_;
 216
 217   base::WeakPtrFactory<HIDDetectionScreenHandler> weak_ptr_factory_;
 218
 219   DISALLOW_COPY_AND_ASSIGN(HIDDetectionScreenHandler);
 220 };
 221
 222 }  // namespace chromeos
 223
 224 #endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_HID_DETECTION_SCREEN_HANDLER_H_
 225