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Limit cursor clip region to desktop region

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svn path=/trunk/; revision=6030
This commit is contained in:
Gé van Geldorp 2003-09-09 20:10:38 +00:00
parent 7479009d8c
commit 05023f216e
1 changed files with 22 additions and 9 deletions
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31
reactos/subsys/win32k/objects/cursoricon.c
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@ -9,6 +9,8 @@
#include <include/winsta.h>
#include <include/error.h>
#include <include/mouse.h>
#include <include/window.h>
#include <internal/safe.h>
#define NDEBUG
#include <win32k/debug1.h>
@ -229,12 +231,14 @@ NtUserGetCursorInfo(
BOOL
STDCALL
NtUserClipCursor(
RECT *lpRect)
RECT *UnsafeRect)
{
/* FIXME - check if process has WINSTA_WRITEATTRIBUTES */
PWINSTATION_OBJECT WinStaObject;
PSYSTEM_CURSORINFO CurInfo;
PWINDOW_OBJECT DesktopWindow;
RECT Rect;
NTSTATUS Status = ValidateWindowStationHandle(PROCESS_WINDOW_STATION(),
KernelMode,
@ -242,23 +246,32 @@ NtUserClipCursor(
&WinStaObject);
if (!NT_SUCCESS(Status))
{
DPRINT("Validation of window station handle (0x%X) failed\n",
DPRINT1("Validation of window station handle (0x%X) failed\n",
PROCESS_WINDOW_STATION());
SetLastWin32Error(Status);
return FALSE;
}
if (NULL != UnsafeRect && ! NT_SUCCESS(MmCopyFromCaller(&Rect, UnsafeRect, sizeof(RECT))))
{
ObDereferenceObject(WinStaObject);
SetLastWin32Error(ERROR_INVALID_PARAMETER);
return FALSE;
}
CurInfo = &WinStaObject->SystemCursor;
if(lpRect)
if(UnsafeRect)
{
if((lpRect->right >= lpRect->left) &&
(lpRect->bottom >= lpRect->top))
if((Rect.right >= Rect.left) &&
(Rect.bottom >= Rect.top))
{
DesktopWindow = IntGetWindowObject(WinStaObject->ActiveDesktop->DesktopWindow);
CurInfo->CursorClipInfo.IsClipped = TRUE;
CurInfo->CursorClipInfo.Left = lpRect->left;
CurInfo->CursorClipInfo.Top = lpRect->top;
CurInfo->CursorClipInfo.Right = lpRect->right;
CurInfo->CursorClipInfo.Bottom = lpRect->bottom;
CurInfo->CursorClipInfo.Left = max(Rect.left, DesktopWindow->WindowRect.left);
CurInfo->CursorClipInfo.Top = max(Rect.top, DesktopWindow->WindowRect.top);
CurInfo->CursorClipInfo.Right = min(Rect.right, DesktopWindow->WindowRect.right);
CurInfo->CursorClipInfo.Bottom = min(Rect.bottom, DesktopWindow->WindowRect.bottom);
IntReleaseWindowObject(DesktopWindow);
MouseMoveCursor(CurInfo->x, CurInfo->y);
}