winex11.drv: Do not change the decorations of a fullscreen window.

[Dmitry Timoshkov]

Metacity gets confused and does unmap/map a fullscreen window,
even if the decorations didn't change, this leads to an unexpected
FocusOut event.

This is hopefully a more correct fix for the problem reported in
the bug 26017 that the game 3D Pinball can't enter fullscreen mode
correctly.
---
 dlls/winex11.drv/window.c |   24 ++++++++++++++++++++++--
 1 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/dlls/winex11.drv/window.c b/dlls/winex11.drv/window.c
index e2ffccc..bde018a 100644
--- a/dlls/winex11.drv/window.c
+++ b/dlls/winex11.drv/window.c
@@ -253,6 +253,17 @@ static inline BOOL is_window_resizable( struct x11drv_win_data *data, DWORD styl
 
 
 /***********************************************************************
+ *		is_window_fullscreen
+ *
+ * Check if the window is in fullscreen state
+ */
+static inline BOOL is_window_fullscreen( struct x11drv_win_data *data )
+{
+    return (data->net_wm_state & (1 << NET_WM_STATE_FULLSCREEN));
+}
+
+
+/***********************************************************************
  *              get_mwm_decorations
  */
 static unsigned long get_mwm_decorations( struct x11drv_win_data *data,
@@ -1173,8 +1184,17 @@ static void set_wm_hints( Display *display, struct x11drv_win_data *data )
     XChangeProperty(display, data->whole_window, x11drv_atom(_NET_WM_WINDOW_TYPE),
 		    XA_ATOM, 32, PropModeReplace, (unsigned char*)&window_type, 1);
 
-    mwm_hints.flags = MWM_HINTS_FUNCTIONS | MWM_HINTS_DECORATIONS;
-    mwm_hints.decorations = get_mwm_decorations( data, style, ex_style );
+    mwm_hints.flags = 0;
+    /* Metacity gets confused and does unmap/map a fullscreen window,
+     * even if the decorations didn't change, this leads to an unexpected
+     * FocusOut event.
+     */
+    if (!is_window_fullscreen( data ))
+    {
+        mwm_hints.flags |= MWM_HINTS_DECORATIONS;
+        mwm_hints.decorations = get_mwm_decorations( data, style, ex_style );
+    }
+    mwm_hints.flags |= MWM_HINTS_FUNCTIONS;
     mwm_hints.functions = MWM_FUNC_MOVE;
     if (is_window_resizable( data, style )) mwm_hints.functions |= MWM_FUNC_RESIZE;
     if (!(style & WS_DISABLED))
-- 
1.7.4.1