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

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/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS Win32k subsystem
* PURPOSE: General input functions
* FILE: subsystems/win32/win32k/ntuser/input.c
* PROGRAMERS: Casper S. Hornstrup (chorns@users.sourceforge.net)
* Rafal Harabien (rafalh@reactos.org)
*/
#include <win32k.h>
DBG_DEFAULT_CHANNEL(UserInput);
/* GLOBALS *******************************************************************/
PTHREADINFO ptiRawInput;
PTHREADINFO ptiKeyboard;
PTHREADINFO ptiMouse;
PKTIMER MasterTimer = NULL;
PATTACHINFO gpai = NULL;
HANDLE ghKeyboardDevice;
static DWORD LastInputTick = 0;
static HANDLE ghMouseDevice;
/* FUNCTIONS *****************************************************************/
/*
* IntLastInputTick
*
* Updates or gets last input tick count
*/
static DWORD FASTCALL
IntLastInputTick(BOOL bUpdate)
{
if (bUpdate)
{
LARGE_INTEGER TickCount;
KeQueryTickCount(&TickCount);
LastInputTick = MsqCalculateMessageTime(&TickCount);
if (gpsi) gpsi->dwLastRITEventTickCount = LastInputTick;
}
return LastInputTick;
}
/*
* DoTheScreenSaver
*
* Check if scrensaver should be started and sends message to SAS window
*/
VOID FASTCALL
DoTheScreenSaver(VOID)
{
LARGE_INTEGER TickCount;
DWORD Test, TO;
if (gspv.iScrSaverTimeout > 0) // Zero means Off.
{
KeQueryTickCount(&TickCount);
Test = MsqCalculateMessageTime(&TickCount);
Test = Test - LastInputTick;
TO = 1000 * gspv.iScrSaverTimeout;
if (Test > TO)
{
TRACE("Screensaver Message Start! Tick %d Timeout %d \n", Test, gspv.iScrSaverTimeout);
if (ppiScrnSaver) // We are or we are not the screensaver, prevent reentry...
{
if (!(ppiScrnSaver->W32PF_flags & W32PF_IDLESCREENSAVER))
{
ppiScrnSaver->W32PF_flags |= W32PF_IDLESCREENSAVER;
ERR("Screensaver is Idle\n");
}
}
else
{
PUSER_MESSAGE_QUEUE ForegroundQueue = IntGetFocusMessageQueue();
if (ForegroundQueue && ForegroundQueue->ActiveWindow)
UserPostMessage(hwndSAS, WM_LOGONNOTIFY, LN_START_SCREENSAVE, 1); // lParam 1 == Secure
else
UserPostMessage(hwndSAS, WM_LOGONNOTIFY, LN_START_SCREENSAVE, 0);
}
}
}
}
/*
* OpenInputDevice
*
* Opens input device for asynchronous access
*/
static
NTSTATUS NTAPI
OpenInputDevice(PHANDLE pHandle, PFILE_OBJECT *ppObject, CONST WCHAR *pszDeviceName)
{
UNICODE_STRING DeviceName;
OBJECT_ATTRIBUTES ObjectAttributes;
NTSTATUS Status;
IO_STATUS_BLOCK Iosb;
RtlInitUnicodeString(&DeviceName, pszDeviceName);
InitializeObjectAttributes(&ObjectAttributes,
&DeviceName,
0,
NULL,
NULL);
Status = ZwOpenFile(pHandle,
FILE_ALL_ACCESS,
&ObjectAttributes,
&Iosb,
0,
0);
if (NT_SUCCESS(Status) && ppObject)
{
Status = ObReferenceObjectByHandle(*pHandle, SYNCHRONIZE, NULL, KernelMode, (PVOID*)ppObject, NULL);
ASSERT(NT_SUCCESS(Status));
}
return Status;
}
/*
* RawInputThreadMain
*
* Reads data from input devices and supports win32 timers
*/
VOID NTAPI
RawInputThreadMain()
{
NTSTATUS MouStatus = STATUS_UNSUCCESSFUL, KbdStatus = STATUS_UNSUCCESSFUL, Status;
IO_STATUS_BLOCK MouIosb, KbdIosb;
PFILE_OBJECT pKbdDevice, pMouDevice;
LARGE_INTEGER ByteOffset;
//LARGE_INTEGER WaitTimeout;
PVOID WaitObjects[3], pSignaledObject = NULL;
ULONG cWaitObjects = 0, cMaxWaitObjects = 1;
MOUSE_INPUT_DATA MouseInput;
KEYBOARD_INPUT_DATA KeyInput;
ByteOffset.QuadPart = (LONGLONG)0;
//WaitTimeout.QuadPart = (LONGLONG)(-10000000);
ptiRawInput = PsGetCurrentThreadWin32Thread();
ptiRawInput->TIF_flags |= TIF_SYSTEMTHREAD;
TRACE("Raw Input Thread 0x%x\n", ptiRawInput);
KeSetPriorityThread(&PsGetCurrentThread()->Tcb,
LOW_REALTIME_PRIORITY + 3);
UserEnterExclusive();
StartTheTimers();
UserLeave();
for(;;)
{
if (!ghMouseDevice)
{
/* Check if mouse device already exists */
Status = OpenInputDevice(&ghMouseDevice, &pMouDevice, L"\\Device\\PointerClass0" );
if (NT_SUCCESS(Status))
{
++cMaxWaitObjects;
TRACE("Mouse connected!\n");
}
}
if (!ghKeyboardDevice)
{
/* Check if keyboard device already exists */
Status = OpenInputDevice(&ghKeyboardDevice, &pKbdDevice, L"\\Device\\KeyboardClass0");
if (NT_SUCCESS(Status))
{
++cMaxWaitObjects;
TRACE("Keyboard connected!\n");
}
}
/* Reset WaitHandles array */
cWaitObjects = 0;
WaitObjects[cWaitObjects++] = MasterTimer;
if (ghMouseDevice)
{
/* Try to read from mouse if previous reading is not pending */
if (MouStatus != STATUS_PENDING)
{
MouStatus = ZwReadFile(ghMouseDevice,
NULL,
NULL,
NULL,
&MouIosb,
&MouseInput,
sizeof(MOUSE_INPUT_DATA),
&ByteOffset,
NULL);
}
if (MouStatus == STATUS_PENDING)
WaitObjects[cWaitObjects++] = &pMouDevice->Event;
}
if (ghKeyboardDevice)
{
/* Try to read from keyboard if previous reading is not pending */
if (KbdStatus != STATUS_PENDING)
{
KbdStatus = ZwReadFile(ghKeyboardDevice,
NULL,
NULL,
NULL,
&KbdIosb,
&KeyInput,
sizeof(KEYBOARD_INPUT_DATA),
&ByteOffset,
NULL);
}
if (KbdStatus == STATUS_PENDING)
WaitObjects[cWaitObjects++] = &pKbdDevice->Event;
}
/* If all objects are pending, wait for them */
if (cWaitObjects == cMaxWaitObjects)
{
Status = KeWaitForMultipleObjects(cWaitObjects,
WaitObjects,
WaitAny,
UserRequest,
KernelMode,
TRUE,
NULL,//&WaitTimeout,
NULL);
if (Status >= STATUS_WAIT_0 && Status < STATUS_WAIT_0 + cWaitObjects)
{
/* Some device has finished reading */
pSignaledObject = WaitObjects[Status - STATUS_WAIT_0];
/* Check if it is mouse or keyboard and update status */
if (pSignaledObject == &pMouDevice->Event)
MouStatus = MouIosb.Status;
else if (pSignaledObject == &pKbdDevice->Event)
KbdStatus = KbdIosb.Status;
else if (pSignaledObject == MasterTimer)
{
ProcessTimers();
}
else ASSERT(FALSE);
}
}
/* Have we successed reading from mouse? */
if (NT_SUCCESS(MouStatus) && MouStatus != STATUS_PENDING)
{
TRACE("MouseEvent\n");
/* Set LastInputTick */
IntLastInputTick(TRUE);
/* Process data */
UserEnterExclusive();
UserProcessMouseInput(&MouseInput);
UserLeave();
}
else if (MouStatus != STATUS_PENDING)
ERR("Failed to read from mouse: %x.\n", MouStatus);
/* Have we successed reading from keyboard? */
if (NT_SUCCESS(KbdStatus) && KbdStatus != STATUS_PENDING)
{
TRACE("KeyboardEvent: %s %04x\n",
(KeyInput.Flags & KEY_BREAK) ? "up" : "down",
KeyInput.MakeCode);
/* Set LastInputTick */
IntLastInputTick(TRUE);
/* Process data */
UserEnterExclusive();
UserProcessKeyboardInput(&KeyInput);
UserLeave();
}
else if (KbdStatus != STATUS_PENDING)
ERR("Failed to read from keyboard: %x.\n", KbdStatus);
}
ERR("Raw Input Thread Exit!\n");
}
/*
* CreateSystemThreads
*
* Called form dedicated thread in CSRSS. RIT is started in context of this
* thread because it needs valid Win32 process with TEB initialized
*/
DWORD NTAPI
CreateSystemThreads(UINT Type)
{
UserLeave();
switch (Type)
{
case 0: RawInputThreadMain(); break;
default: ERR("Wrong type: %x\n", Type);
}
UserEnterShared();
return 0;
}
/*
* InitInputImpl
*
* Inits input implementation
*/
INIT_FUNCTION
NTSTATUS
NTAPI
InitInputImpl(VOID)
{
MasterTimer = ExAllocatePoolWithTag(NonPagedPool, sizeof(KTIMER), USERTAG_SYSTEM);
if (!MasterTimer)
{
ERR("Failed to allocate memory\n");
ASSERT(FALSE);
return STATUS_UNSUCCESSFUL;
}
KeInitializeTimer(MasterTimer);
return STATUS_SUCCESS;
}
/*
* CleanupInputImp
*
* Cleans input implementation
*/
NTSTATUS FASTCALL
CleanupInputImp(VOID)
{
return STATUS_SUCCESS;
}
BOOL FASTCALL
IntBlockInput(PTHREADINFO pti, BOOL BlockIt)
{
PTHREADINFO OldBlock;
ASSERT(pti);
if(!pti->rpdesk || ((pti->TIF_flags & TIF_INCLEANUP) && BlockIt))
{
/*
* Fail blocking if exiting the thread
*/
return FALSE;
}
/*
* FIXME: Check access rights of the window station
* e.g. services running in the service window station cannot block input
*/
if(!ThreadHasInputAccess(pti) ||
!IntIsActiveDesktop(pti->rpdesk))
{
EngSetLastError(ERROR_ACCESS_DENIED);
return FALSE;
}
ASSERT(pti->rpdesk);
OldBlock = pti->rpdesk->BlockInputThread;
if(OldBlock)
{
if(OldBlock != pti)
{
EngSetLastError(ERROR_ACCESS_DENIED);
return FALSE;
}
pti->rpdesk->BlockInputThread = (BlockIt ? pti : NULL);
return OldBlock == NULL;
}
pti->rpdesk->BlockInputThread = (BlockIt ? pti : NULL);
return OldBlock == NULL;
}
BOOL
APIENTRY
NtUserBlockInput(
BOOL BlockIt)
{
BOOL ret;
TRACE("Enter NtUserBlockInput\n");
UserEnterExclusive();
ret = IntBlockInput(PsGetCurrentThreadWin32Thread(), BlockIt);
UserLeave();
TRACE("Leave NtUserBlockInput, ret=%i\n", ret);
return ret;
}
BOOL FASTCALL
UserAttachThreadInput(PTHREADINFO pti, PTHREADINFO ptiTo, BOOL fAttach)
{
PATTACHINFO pai;
/* Can not be the same thread. */
if (pti == ptiTo) return FALSE;
/* Do not attach to system threads or between different desktops. */
if (pti->TIF_flags & TIF_DONTATTACHQUEUE ||
ptiTo->TIF_flags & TIF_DONTATTACHQUEUE ||
pti->rpdesk != ptiTo->rpdesk)
return FALSE;
/* If Attach set, allocate and link. */
if (fAttach)
{
pai = ExAllocatePoolWithTag(PagedPool, sizeof(ATTACHINFO), USERTAG_ATTACHINFO);
if (!pai) return FALSE;
pai->paiNext = gpai;
pai->pti1 = pti;
pai->pti2 = ptiTo;
gpai = pai;
}
else /* If clear, unlink and free it. */
{
PATTACHINFO paiprev = NULL;
if (!gpai) return FALSE;
pai = gpai;
/* Search list and free if found or return false. */
do
{
if (pai->pti2 == ptiTo && pai->pti1 == pti) break;
paiprev = pai;
pai = pai->paiNext;
} while (pai);
if (!pai) return FALSE;
if (paiprev) paiprev->paiNext = pai->paiNext;
ExFreePoolWithTag(pai, USERTAG_ATTACHINFO);
}
return TRUE;
}
/*
* NtUserSendInput
*
* Generates input events from software
*/
UINT
APIENTRY
NtUserSendInput(
UINT nInputs,
LPINPUT pInput,
INT cbSize)
{
PTHREADINFO pti;
UINT uRet = 0;
TRACE("Enter NtUserSendInput\n");
UserEnterExclusive();
pti = PsGetCurrentThreadWin32Thread();
ASSERT(pti);
if (!pti->rpdesk)
{
goto cleanup;
}
if (!nInputs || !pInput || cbSize != sizeof(INPUT))
{
EngSetLastError(ERROR_INVALID_PARAMETER);
goto cleanup;
}
/*
* FIXME: Check access rights of the window station
* e.g. services running in the service window station cannot block input
*/
if (!ThreadHasInputAccess(pti) ||
!IntIsActiveDesktop(pti->rpdesk))
{
EngSetLastError(ERROR_ACCESS_DENIED);
goto cleanup;
}
while (nInputs--)
{
INPUT SafeInput;
NTSTATUS Status;
Status = MmCopyFromCaller(&SafeInput, pInput++, sizeof(INPUT));
if (!NT_SUCCESS(Status))
{
SetLastNtError(Status);
goto cleanup;
}
switch (SafeInput.type)
{
case INPUT_MOUSE:
if (UserSendMouseInput(&SafeInput.mi, TRUE))
uRet++;
break;
case INPUT_KEYBOARD:
if (UserSendKeyboardInput(&SafeInput.ki, TRUE))
uRet++;
break;
case INPUT_HARDWARE:
FIXME("INPUT_HARDWARE not supported!");
break;
default:
ERR("SendInput(): Invalid input type: 0x%x\n", SafeInput.type);
break;
}
}
cleanup:
TRACE("Leave NtUserSendInput, ret=%i\n", uRet);
UserLeave();
return uRet;
}
/* EOF */