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Optimize IsChild() to use the desktop heap instead of calling win32k

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svn path=/trunk/; revision=30519
This commit is contained in:
Thomas Bluemel 2007-11-17 06:50:23 +00:00
parent 1e40d2861b
commit 0a9026f76e
1 changed files with 32 additions and 10 deletions
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42
reactos/dll/win32/user32/windows/window.c
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@ -1252,18 +1252,40 @@ BOOL STDCALL
IsChild(HWND hWndParent,
HWND hWnd)
{
if (! IsWindow(hWndParent) || ! IsWindow(hWnd))
{
return FALSE;
}
PWINDOW WndParent, Wnd;
BOOL Ret = FALSE;
do
{
hWnd = (HWND)NtUserGetWindowLong(hWnd, GWL_HWNDPARENT, FALSE);
}
while (hWnd != NULL && hWnd != hWndParent);
WndParent = ValidateHwnd(hWndParent);
if (!WndParent)
return FALSE;
Wnd = ValidateHwnd(hWnd);
if (!Wnd)
return FALSE;
return hWnd == hWndParent;
_SEH_TRY
{
while (Wnd != NULL)
{
if (Wnd->Parent != NULL)
{
Wnd = DesktopPtrToUser(Wnd->Parent);
if (Wnd == WndParent)
{
Ret = TRUE;
break;
}
}
else
break;
}
}
_SEH_HANDLE
{
/* Do nothing */
}
_SEH_END;
return Ret;
}