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NtUserBuildHwndList:

Browse source 
- handle bChildren
- remove some code duplication

svn path=/trunk/; revision=25920
This commit is contained in:
Timo Kreuzer 2007-02-28 13:19:00 +00:00
parent a9d354b237
commit 9cb8365d3f
1 changed files with 76 additions and 59 deletions
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135
reactos/subsystems/win32/win32k/ntuser/window.c
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@ -1126,6 +1126,42 @@ NtUserAlterWindowStyle(DWORD Unknown0,
return(0);
}
STATIC
ULONG
STDCALL
IntBuildHwndList(
PWINDOW_OBJECT Window,
BOOLEAN bChildren,
HWND* pWnd,
ULONG nBufSize)
{
NTSTATUS Status;
PWINDOW_OBJECT Child;
ULONG dwInc, dwCount = 0;
for(Child = Window->FirstChild; Child != NULL; Child = Child->NextSibling)
{
if(dwCount++ < nBufSize && pWnd)
{
Status = MmCopyToCaller(pWnd++, &Child->hSelf, sizeof(HWND));
if(!NT_SUCCESS(Status))
{
SetLastNtError(Status);
break;
}
}
if (bChildren)
{
dwInc = IntBuildHwndList(Child,
bChildren,
pWnd,
nBufSize > dwCount ? nBufSize - dwCount : 0);
dwCount += dwInc;
pWnd += dwInc;
}
}
return dwCount;
}
/*
* As best as I can figure, this function is used by EnumWindows,
@ -1152,30 +1188,55 @@ NtUserBuildHwndList(
NTSTATUS Status;
ULONG dwCount = 0;
/* FIXME handle bChildren */
if(hwndParent)
if (hwndParent || !dwThreadId)
{
PWINDOW_OBJECT Window, Child;
PDESKTOP_OBJECT Desktop;
PWINDOW_OBJECT Window;
if(!hwndParent)
{
if(hDesktop == NULL && !(Desktop = IntGetActiveDesktop()))
{
SetLastWin32Error(ERROR_INVALID_HANDLE);
return 0;
}
if(hDesktop)
{
Status = IntValidateDesktopHandle(hDesktop,
UserMode,
0,
&Desktop);
if(!NT_SUCCESS(Status))
{
SetLastWin32Error(ERROR_INVALID_HANDLE);
return 0;
}
}
hwndParent = Desktop->DesktopWindow;
}
else
{
hDesktop = 0;
}
if(!(Window = UserGetWindowObject(hwndParent)))
{
if(hDesktop)
{
ObDereferenceObject(Desktop);
}
return 0;
}
for(Child = Window->FirstChild; Child != NULL; Child = Child->NextSibling)
dwCount = IntBuildHwndList(Window, bChildren, pWnd, nBufSize);
if(hDesktop)
{
if(dwCount++ < nBufSize && pWnd)
{
Status = MmCopyToCaller(pWnd++, &Child->hSelf, sizeof(HWND));
if(!NT_SUCCESS(Status))
{
SetLastNtError(Status);
break;
}
}
ObDereferenceObject(Desktop);
}
}
else if(dwThreadId)
else
{
PETHREAD Thread;
PW32THREAD W32Thread;
@ -1217,50 +1278,6 @@ NtUserBuildHwndList(
ObDereferenceObject(Thread);
}
else
{
PDESKTOP_OBJECT Desktop;
PWINDOW_OBJECT Window, Child;
if(hDesktop == NULL && !(Desktop = IntGetActiveDesktop()))
{
SetLastWin32Error(ERROR_INVALID_HANDLE);
return 0;
}
if(hDesktop)
{
Status = IntValidateDesktopHandle(hDesktop,
UserMode,
0,
&Desktop);
if(!NT_SUCCESS(Status))
{
SetLastWin32Error(ERROR_INVALID_HANDLE);
return 0;
}
}
if(!(Window = UserGetWindowObject(Desktop->DesktopWindow)))
{
if(hDesktop) ObDereferenceObject(Desktop);
return 0;
}
for(Child = Window->FirstChild; Child != NULL; Child = Child->NextSibling)
{
if(dwCount++ < nBufSize && pWnd)
{
Status = MmCopyToCaller(pWnd++, &Child->hSelf, sizeof(HWND));
if(!NT_SUCCESS(Status))
{
SetLastNtError(Status);
break;
}
}
}
if(hDesktop) ObDereferenceObject(Desktop);
}
return dwCount;
}