reactos/subsystems/win32/win32k/ntuser/input.c

   1 /*
   2  * COPYRIGHT:        See COPYING in the top level directory
   3  * PROJECT:          ReactOS kernel
   4  * PURPOSE:          General input functions
   5  * FILE:             subsystems/win32/win32k/ntuser/input.c
   6  * PROGRAMERS:       Casper S. Hornstrup (chorns@users.sourceforge.net)
   7  *                   Rafal Harabien (rafalh@reactos.org)
   8  */
   9
  10 #include <win32k.h>
  11 DBG_DEFAULT_CHANNEL(UserInput);
  12
  13 extern NTSTATUS Win32kInitWin32Thread(PETHREAD Thread);
  14 extern PPROCESSINFO ppiScrnSaver;
  15
  16 /* GLOBALS *******************************************************************/
  17
  18 PTHREADINFO ptiRawInput;
  19 PTHREADINFO ptiKeyboard;
  20 PTHREADINFO ptiMouse;
  21 PKTIMER MasterTimer = NULL;
  22 PATTACHINFO gpai = NULL;
  23 HANDLE ghKeyboardDevice;
  24
  25 static DWORD LastInputTick = 0;
  26 static HANDLE ghMouseDevice;
  27
  28 /* FUNCTIONS *****************************************************************/
  29
  30 /*
  31  * IntLastInputTick
  32  *
  33  * Updates or gets last input tick count
  34  */
  35 static DWORD FASTCALL
  36 IntLastInputTick(BOOL bUpdate)
  37 {
  38     if (bUpdate)
  39     {
  40         LARGE_INTEGER TickCount;
  41         KeQueryTickCount(&TickCount);
  42         LastInputTick = MsqCalculateMessageTime(&TickCount);
  43         if (gpsi) gpsi->dwLastRITEventTickCount = LastInputTick;
  44     }
  45     return LastInputTick;
  46 }
  47
  48 /*
  49  * DoTheScreenSaver
  50  *
  51  * Check if scrensaver should be started and sends message to SAS window
  52  */
  53 VOID FASTCALL
  54 DoTheScreenSaver(VOID)
  55 {
  56     LARGE_INTEGER TickCount;
  57     DWORD Test, TO;
  58
  59     if (gspv.iScrSaverTimeout > 0) // Zero means Off.
  60     {
  61         KeQueryTickCount(&TickCount);
  62         Test = MsqCalculateMessageTime(&TickCount);
  63         Test = Test - LastInputTick;
  64         TO = 1000 * gspv.iScrSaverTimeout;
  65         if (Test > TO)
  66         {
  67             TRACE("Screensaver Message Start! Tick %d Timeout %d \n", Test, gspv.iScrSaverTimeout);
  68
  69             if (ppiScrnSaver) // We are or we are not the screensaver, prevent reentry...
  70             {
  71                 if (!(ppiScrnSaver->W32PF_flags & W32PF_IDLESCREENSAVER))
  72                 {
  73                     ppiScrnSaver->W32PF_flags |= W32PF_IDLESCREENSAVER;
  74                     ERR("Screensaver is Idle\n");
  75                 }
  76             }
  77             else
  78             {
  79                 PUSER_MESSAGE_QUEUE ForegroundQueue = IntGetFocusMessageQueue();
  80                 if (ForegroundQueue && ForegroundQueue->ActiveWindow)
  81                     UserPostMessage(hwndSAS, WM_LOGONNOTIFY, LN_START_SCREENSAVE, 1); // lParam 1 == Secure
  82                 else
  83                     UserPostMessage(hwndSAS, WM_LOGONNOTIFY, LN_START_SCREENSAVE, 0);
  84             }
  85         }
  86     }
  87 }
  88
  89 /*
  90  * OpenInputDevice
  91  *
  92  * Opens input device for asynchronous access
  93  */
  94 static
  95 NTAPI NTSTATUS
  96 OpenInputDevice(PHANDLE pHandle, PFILE_OBJECT *ppObject, CONST WCHAR *pszDeviceName)
  97 {
  98     UNICODE_STRING DeviceName;
  99     OBJECT_ATTRIBUTES ObjectAttributes;
 100     NTSTATUS Status;
 101     IO_STATUS_BLOCK Iosb;
 102
 103     RtlInitUnicodeString(&DeviceName, pszDeviceName);
 104
 105     InitializeObjectAttributes(&ObjectAttributes,
 106                                &DeviceName,
 107                                0,
 108                                NULL,
 109                                NULL);
 110
 111     Status = ZwOpenFile(pHandle,
 112                         FILE_ALL_ACCESS,
 113                         &ObjectAttributes,
 114                         &Iosb,
 115                         0,
 116                         0);
 117     if (NT_SUCCESS(Status) && ppObject)
 118     {
 119         Status = ObReferenceObjectByHandle(*pHandle, SYNCHRONIZE, NULL, KernelMode, (PVOID*)ppObject, NULL);
 120         ASSERT(NT_SUCCESS(Status));
 121     }
 122
 123     return Status;
 124 }
 125
 126 /*
 127  * RawInputThreadMain
 128  *
 129  * Reads data from input devices and supports win32 timers
 130  */
 131 VOID NTAPI
 132 RawInputThreadMain()
 133 {
 134     NTSTATUS MouStatus = STATUS_UNSUCCESSFUL, KbdStatus = STATUS_UNSUCCESSFUL, Status;
 135     IO_STATUS_BLOCK MouIosb, KbdIosb;
 136     PFILE_OBJECT pKbdDevice, pMouDevice;
 137     LARGE_INTEGER WaitTimeout, ByteOffset;
 138     PVOID WaitObjects[3], pSignaledObject = NULL;
 139     ULONG cWaitObjects = 0, cMaxWaitObjects = 1;
 140     MOUSE_INPUT_DATA MouseInput;
 141     KEYBOARD_INPUT_DATA KeyInput;
 142
 143     ByteOffset.QuadPart = (LONGLONG)0;
 144     WaitTimeout.QuadPart = (LONGLONG)(-10000000);
 145
 146     ptiRawInput = PsGetCurrentThreadWin32Thread();
 147     ptiRawInput->TIF_flags |= TIF_SYSTEMTHREAD;
 148     TRACE("Raw Input Thread 0x%x\n", ptiRawInput);
 149
 150     KeSetPriorityThread(&PsGetCurrentThread()->Tcb,
 151                         LOW_REALTIME_PRIORITY + 3);
 152
 153     UserEnterExclusive();
 154     StartTheTimers();
 155     UserLeave();
 156
 157     for(;;)
 158     {
 159         if (!ghMouseDevice)
 160         {
 161             /* Check if mouse device already exists */
 162             Status = OpenInputDevice(&ghMouseDevice, &pMouDevice, L"\\Device\\PointerClass0" );
 163             if (NT_SUCCESS(Status))
 164             {
 165                 ++cMaxWaitObjects;
 166                 TRACE("Mouse connected!\n");
 167             }
 168         }
 169         if (!ghKeyboardDevice)
 170         {
 171             /* Check if keyboard device already exists */
 172             Status = OpenInputDevice(&ghKeyboardDevice, &pKbdDevice, L"\\Device\\KeyboardClass0");
 173             if (NT_SUCCESS(Status))
 174             {
 175                 ++cMaxWaitObjects;
 176                 TRACE("Keyboard connected!\n");
 177             }
 178         }
 179
 180         /* Reset WaitHandles array */
 181         cWaitObjects = 0;
 182         WaitObjects[cWaitObjects++] = MasterTimer;
 183
 184         if (ghMouseDevice)
 185         {
 186             /* Try to read from mouse if previous reading is not pending */
 187             if (MouStatus != STATUS_PENDING)
 188             {
 189                 MouStatus = ZwReadFile(ghMouseDevice,
 190                                        NULL,
 191                                        NULL,
 192                                        NULL,
 193                                        &MouIosb,
 194                                        &MouseInput,
 195                                        sizeof(MOUSE_INPUT_DATA),
 196                                        &ByteOffset,
 197                                        NULL);
 198             }
 199
 200             if (MouStatus == STATUS_PENDING)
 201                 WaitObjects[cWaitObjects++] = &pMouDevice->Event;
 202         }
 203
 204         if (ghKeyboardDevice)
 205         {
 206             /* Try to read from keyboard if previous reading is not pending */
 207             if (KbdStatus != STATUS_PENDING)
 208             {
 209                 KbdStatus = ZwReadFile(ghKeyboardDevice,
 210                                        NULL,
 211                                        NULL,
 212                                        NULL,
 213                                        &KbdIosb,
 214                                        &KeyInput,
 215                                        sizeof(KEYBOARD_INPUT_DATA),
 216                                        &ByteOffset,
 217                                        NULL);
 218
 219             }
 220             if (KbdStatus == STATUS_PENDING)
 221                 WaitObjects[cWaitObjects++] = &pKbdDevice->Event;
 222         }
 223
 224         /* If all objects are pending, wait for them */
 225         if (cWaitObjects == cMaxWaitObjects)
 226         {
 227             Status = KeWaitForMultipleObjects(cWaitObjects,
 228                                               WaitObjects,
 229                                               WaitAny,
 230                                               UserRequest,
 231                                               KernelMode,
 232                                               TRUE,
 233                                               NULL,//&WaitTimeout,
 234                                               NULL);
 235
 236             if (Status >= STATUS_WAIT_0 && Status < STATUS_WAIT_0 + cWaitObjects)
 237             {
 238                 /* Some device has finished reading */
 239                 pSignaledObject = WaitObjects[Status - STATUS_WAIT_0];
 240
 241                 /* Check if it is mouse or keyboard and update status */
 242                 if (pSignaledObject == &pMouDevice->Event)
 243                     MouStatus = MouIosb.Status;
 244                 else if (pSignaledObject == &pKbdDevice->Event)
 245                     KbdStatus = KbdIosb.Status;
 246                 else if (pSignaledObject == MasterTimer)
 247                 {
 248                     /* FIXME: where it should go? */
 249                     ProcessTimers();
 250                 }
 251                 else ASSERT(FALSE);
 252             }
 253         }
 254
 255         /* Have we successed reading from mouse? */
 256         if (NT_SUCCESS(MouStatus) && MouStatus != STATUS_PENDING)
 257         {
 258             TRACE("MouseEvent\n");
 259
 260             /* Set LastInputTick */
 261             IntLastInputTick(TRUE);
 262
 263             /* Process data */
 264             UserEnterExclusive();
 265             UserProcessMouseInput(&MouseInput, MouIosb.Information / sizeof(MOUSE_INPUT_DATA));
 266             UserLeave();
 267         }
 268         else if (MouStatus != STATUS_PENDING)
 269             ERR("Failed to read from mouse: %x.\n", MouStatus);
 270
 271         /* Have we successed reading from keyboard? */
 272         if (NT_SUCCESS(KbdStatus) && KbdStatus != STATUS_PENDING)
 273         {
 274             TRACE("KeyboardEvent: %s %04x\n",
 275                   (KeyInput.Flags & KEY_BREAK) ? "up" : "down",
 276                   KeyInput.MakeCode);
 277
 278             /* Set LastInputTick */
 279             IntLastInputTick(TRUE);
 280
 281             /* Process data */
 282             UserEnterExclusive();
 283             UserProcessKeyboardInput(&KeyInput);
 284             UserLeave();
 285         }
 286         else if (KbdStatus != STATUS_PENDING)
 287             ERR("Failed to read from keyboard: %x.\n", KbdStatus);
 288     }
 289     ERR("Raw Input Thread Exit!\n");
 290 }
 291
 292 /*
 293  * CreateSystemThreads
 294  *
 295  * Called form dedicated thread in CSRSS. RIT is started in context of this
 296  * thread because it needs valid Win32 process with TEB initialized
 297  */
 298 DWORD NTAPI
 299 CreateSystemThreads(UINT Type)
 300 {
 301     UserLeave();
 302
 303     switch (Type)
 304     {
 305         case 0: RawInputThreadMain(); break;
 306         default: ERR("Wrong type: %x\n", Type);
 307     }
 308
 309     UserEnterShared();
 310
 311     return 0;
 312 }
 313
 314 /*
 315  * InitInputImpl
 316  *
 317  * Inits input implementation
 318  */
 319 INIT_FUNCTION
 320 NTSTATUS
 321 NTAPI
 322 InitInputImpl(VOID)
 323 {
 324     MasterTimer = ExAllocatePoolWithTag(NonPagedPool, sizeof(KTIMER), USERTAG_SYSTEM);
 325     if (!MasterTimer)
 326     {
 327         ERR("Failed to allocate memory\n");
 328         ASSERT(FALSE);
 329         return STATUS_UNSUCCESSFUL;
 330     }
 331     KeInitializeTimer(MasterTimer);
 332
 333     /* Initialize the default keyboard layout */
 334     if (!UserInitDefaultKeyboardLayout())
 335     {
 336         ERR("Failed to initialize default keyboard layout!\n");
 337     }
 338
 339     return STATUS_SUCCESS;
 340 }
 341
 342 /*
 343  * CleanupInputImp
 344  *
 345  * Cleans input implementation
 346  */
 347 NTSTATUS FASTCALL
 348 CleanupInputImp(VOID)
 349 {
 350     return STATUS_SUCCESS;
 351 }
 352
 353 BOOL FASTCALL
 354 IntBlockInput(PTHREADINFO pti, BOOL BlockIt)
 355 {
 356     PTHREADINFO OldBlock;
 357     ASSERT(pti);
 358
 359     if(!pti->rpdesk || ((pti->TIF_flags & TIF_INCLEANUP) && BlockIt))
 360     {
 361         /*
 362          * fail blocking if exiting the thread
 363          */
 364
 365         return FALSE;
 366     }
 367
 368     /*
 369      * FIXME - check access rights of the window station
 370      *         e.g. services running in the service window station cannot block input
 371      */
 372     if(!ThreadHasInputAccess(pti) ||
 373        !IntIsActiveDesktop(pti->rpdesk))
 374     {
 375         EngSetLastError(ERROR_ACCESS_DENIED);
 376         return FALSE;
 377     }
 378
 379     ASSERT(pti->rpdesk);
 380     OldBlock = pti->rpdesk->BlockInputThread;
 381     if(OldBlock)
 382     {
 383         if(OldBlock != pti)
 384         {
 385             EngSetLastError(ERROR_ACCESS_DENIED);
 386             return FALSE;
 387         }
 388         pti->rpdesk->BlockInputThread = (BlockIt ? pti : NULL);
 389         return OldBlock == NULL;
 390     }
 391
 392     pti->rpdesk->BlockInputThread = (BlockIt ? pti : NULL);
 393     return OldBlock == NULL;
 394 }
 395
 396 BOOL
 397 APIENTRY
 398 NtUserBlockInput(
 399     BOOL BlockIt)
 400 {
 401     BOOL ret;
 402
 403     TRACE("Enter NtUserBlockInput\n");
 404     UserEnterExclusive();
 405
 406     ret = IntBlockInput(PsGetCurrentThreadWin32Thread(), BlockIt);
 407
 408     UserLeave();
 409     TRACE("Leave NtUserBlockInput, ret=%i\n", ret);
 410
 411     return ret;
 412 }
 413
 414 BOOL FASTCALL
 415 UserAttachThreadInput(PTHREADINFO pti, PTHREADINFO ptiTo, BOOL fAttach)
 416 {
 417     PATTACHINFO pai;
 418
 419     /* Can not be the same thread.*/
 420     if (pti == ptiTo) return FALSE;
 421
 422     /* Do not attach to system threads or between different desktops. */
 423     if (pti->TIF_flags & TIF_DONTATTACHQUEUE ||
 424             ptiTo->TIF_flags & TIF_DONTATTACHQUEUE ||
 425             pti->rpdesk != ptiTo->rpdesk)
 426         return FALSE;
 427
 428     /* If Attach set, allocate and link. */
 429     if (fAttach)
 430     {
 431         pai = ExAllocatePoolWithTag(PagedPool, sizeof(ATTACHINFO), USERTAG_ATTACHINFO);
 432         if (!pai) return FALSE;
 433
 434         pai->paiNext = gpai;
 435         pai->pti1 = pti;
 436         pai->pti2 = ptiTo;
 437         gpai = pai;
 438     }
 439     else /* If clear, unlink and free it. */
 440     {
 441         PATTACHINFO paiprev = NULL;
 442
 443         if (!gpai) return FALSE;
 444
 445         pai = gpai;
 446
 447         /* Search list and free if found or return false. */
 448         do
 449         {
 450             if (pai->pti2 == ptiTo && pai->pti1 == pti) break;
 451             paiprev = pai;
 452             pai = pai->paiNext;
 453         } while (pai);
 454
 455         if (!pai) return FALSE;
 456
 457         if (paiprev) paiprev->paiNext = pai->paiNext;
 458
 459         ExFreePoolWithTag(pai, USERTAG_ATTACHINFO);
 460     }
 461
 462     return TRUE;
 463 }
 464
 465 /*
 466  * NtUserSendInput
 467  *
 468  * Generates input events from software
 469  */
 470 UINT
 471 APIENTRY
 472 NtUserSendInput(
 473     UINT nInputs,
 474     LPINPUT pInput,
 475     INT cbSize)
 476 {
 477     PTHREADINFO pti;
 478     UINT uRet = 0;
 479
 480     TRACE("Enter NtUserSendInput\n");
 481     UserEnterExclusive();
 482
 483     pti = PsGetCurrentThreadWin32Thread();
 484     ASSERT(pti);
 485
 486     if (!pti->rpdesk)
 487     {
 488         goto cleanup;
 489     }
 490
 491     if (!nInputs || !pInput || cbSize != sizeof(INPUT))
 492     {
 493         EngSetLastError(ERROR_INVALID_PARAMETER);
 494         goto cleanup;
 495     }
 496
 497     /*
 498      * FIXME - check access rights of the window station
 499      *         e.g. services running in the service window station cannot block input
 500      */
 501     if (!ThreadHasInputAccess(pti) ||
 502         !IntIsActiveDesktop(pti->rpdesk))
 503     {
 504         EngSetLastError(ERROR_ACCESS_DENIED);
 505         goto cleanup;
 506     }
 507
 508     while (nInputs--)
 509     {
 510         INPUT SafeInput;
 511         NTSTATUS Status;
 512
 513         Status = MmCopyFromCaller(&SafeInput, pInput++, sizeof(INPUT));
 514         if (!NT_SUCCESS(Status))
 515         {
 516             SetLastNtError(Status);
 517             goto cleanup;
 518         }
 519
 520         switch (SafeInput.type)
 521         {
 522             case INPUT_MOUSE:
 523                 if (IntMouseInput(&SafeInput.mi, TRUE))
 524                     uRet++;
 525                 break;
 526             case INPUT_KEYBOARD:
 527                 if (UserSendKeyboardInput(&SafeInput.ki, TRUE))
 528                     uRet++;
 529                 break;
 530             case INPUT_HARDWARE:
 531                 FIXME("INPUT_HARDWARE not supported!");
 532                 break;
 533             default:
 534                 ERR("SendInput(): Invalid input type: 0x%x\n", SafeInput.type);
 535                 break;
 536         }
 537     }
 538
 539 cleanup:
 540     TRACE("Leave NtUserSendInput, ret=%i\n", uRet);
 541     UserLeave();
 542     return uRet;
 543 }
 544
 545 /* EOF */