Take into account CS_NOCLOSE window class style and SC_CLOSE system menu item state while handling WM_X11DRV_DELETE_WINDOW request

[Dmitry Timoshkov]

Hello,

this patch should fix a bug in the app I'm working on.

Changelog:
    Dmitry Timoshkov <dmitry at codeweavers.com>
    Take into account CS_NOCLOSE window class style and SC_CLOSE system
    menu item state while handling WM_X11DRV_DELETE_WINDOW request.

--- cvs/hq/wine/dlls/x11drv/event.c	Fri Jun  3 13:43:27 2005
+++ wine/dlls/x11drv/event.c	Sun Jul 24 12:41:12 2005
@@ -394,7 +394,20 @@ static void handle_wm_protocols( HWND hw
          * and we are in managed mode. This is to disallow applications from
          * being closed by the window manager while in a modal state.
          */
-        if (IsWindowEnabled(hwnd)) PostMessageW( hwnd, WM_X11DRV_DELETE_WINDOW, 0, 0 );
+        if (IsWindowEnabled(hwnd))
+        {
+            HMENU hSysMenu;
+
+            if (GetClassLongW(hwnd, GCL_STYLE) & CS_NOCLOSE) return;
+            hSysMenu = GetSystemMenu(hwnd, FALSE);
+            if (hSysMenu)
+            {
+                UINT state = GetMenuState(hSysMenu, SC_CLOSE, MF_BYCOMMAND);
+                if (state == 0xFFFFFFFF || (state & (MF_DISABLED | MF_GRAYED)))
+                    return;
+            }
+            PostMessageW( hwnd, WM_X11DRV_DELETE_WINDOW, 0, 0 );
+        }
     }
     else if (protocol == x11drv_atom(WM_TAKE_FOCUS))
     {