[tkreuzer] 25410: Make NtUserSetFocus accept NULL window.

Author: tkreuzer
Date: Wed Jan 10 07:23:33 2007
New Revision: 25410

URL: http://svn.reactos.org/svn/reactos?rev=25410&view=rev
Log:
Make NtUserSetFocus accept NULL window.

Modified:
    trunk/reactos/subsystems/win32/win32k/ntuser/focus.c

Modified: trunk/reactos/subsystems/win32/win32k/ntuser/focus.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/win32/win32k/ntu...
==============================================================================
--- trunk/reactos/subsystems/win32/win32k/ntuser/focus.c (original)
+++ trunk/reactos/subsystems/win32/win32k/ntuser/focus.c Wed Jan 10 07:23:33 2007
@@ -304,27 +304,37 @@

static
 HWND FASTCALL
-co_IntSetFocusWindow(PWINDOW_OBJECT Window)
+co_IntSetFocusWindow(PWINDOW_OBJECT Window OPTIONAL)
 {
    HWND hWndPrev = 0;
    PUSER_MESSAGE_QUEUE ThreadQueue;

-   ASSERT_REFS_CO(Window);
+   if (Window)
+      ASSERT_REFS_CO(Window);

ThreadQueue = (PUSER_MESSAGE_QUEUE)PsGetCurrentThreadWin32Thread()->MessageQueue;
    ASSERT(ThreadQueue != 0);

hWndPrev = ThreadQueue->FocusWindow;
-   if (hWndPrev == Window->hSelf)
-   {
-      return hWndPrev;
-   }
-
-   ThreadQueue->FocusWindow = Window->hSelf;
-
-   co_IntSendKillFocusMessages(hWndPrev, Window->hSelf);
-   co_IntSendSetFocusMessages(hWndPrev, Window->hSelf);
-
+
+   if (Window != 0)
+   {
+      if (hWndPrev == Window->hSelf)
+      {
+         return hWndPrev;
+      }
+
+      ThreadQueue->FocusWindow = Window->hSelf;
+
+      co_IntSendKillFocusMessages(hWndPrev, Window->hSelf);
+      co_IntSendSetFocusMessages(hWndPrev, Window->hSelf);
+   }
+   else
+   {
+      ThreadQueue->FocusWindow = 0;
+ 
+      co_IntSendKillFocusMessages(hWndPrev, 0);
+   }
    return hWndPrev;
 }

@@ -562,16 +572,23 @@
    DPRINT("Enter NtUserSetFocus(%x)\n", hWnd);
    UserEnterExclusive();

-   if (!(Window = UserGetWindowObject(hWnd)))
-   {
-      RETURN(NULL);
-   }
-
-   UserRefObjectCo(Window, &Ref);
-   ret = co_UserSetFocus(Window);
-   UserDerefObjectCo(Window);
+   if (hWnd)
+   {
+      if (!(Window = UserGetWindowObject(hWnd)))
+      {
+         RETURN(NULL);
+      }
+
+      UserRefObjectCo(Window, &Ref);
+      ret = co_UserSetFocus(Window);
+      UserDerefObjectCo(Window);

-   RETURN(ret);
+      RETURN(ret);
+   }
+   else
+   {
+      RETURN( co_UserSetFocus(0));
+   }

CLEANUP:
    DPRINT("Leave NtUserSetFocus, ret=%i\n",_ret_);