winex11.drv: Use a helper to retrieve the decoration rect for managed windows.

dlls/winex11.drv/window.c

@@ -1154,19 +1154,16 @@ void make_window_embedded( struct x11drv_win_data *data )
 
 
 /***********************************************************************
- *		X11DRV_window_to_X_rect
- *
- * Convert a rect from client to X window coordinates
+ *     get_decoration_rect
  */
-static void X11DRV_window_to_X_rect( struct x11drv_win_data *data, RECT *rect,
+static void get_decoration_rect( struct x11drv_win_data *data, RECT *rect,
                                  const RECT *window_rect, const RECT *client_rect )
 {
     DWORD style, ex_style, style_mask = 0, ex_style_mask = 0;
     unsigned long decor;
-    RECT rc;
 
+    SetRectEmpty( rect );
     if (!data->managed) return;
-    if (IsRectEmpty( rect )) return;
 
     style = GetWindowLongW( data->hwnd, GWL_STYLE );
     ex_style = GetWindowLongW( data->hwnd, GWL_EXSTYLE );
@@ -1179,9 +1176,23 @@ static void X11DRV_window_to_X_rect( struct x11drv_win_data *data, RECT *rect,
         ex_style_mask |= WS_EX_DLGMODALFRAME;
     }
 
-    SetRectEmpty( &rc );
-    AdjustWindowRectEx( &rc, style & style_mask, FALSE, ex_style & ex_style_mask );
+    AdjustWindowRectEx( rect, style & style_mask, FALSE, ex_style & ex_style_mask );
+}
+
+
+/***********************************************************************
+ *		X11DRV_window_to_X_rect
+ *
+ * Convert a rect from client to X window coordinates
+ */
+static void X11DRV_window_to_X_rect( struct x11drv_win_data *data, RECT *rect,
+                                     const RECT *window_rect, const RECT *client_rect )
+{
+    RECT rc;
+
+    if (IsRectEmpty( rect )) return;
 
+    get_decoration_rect( data, &rc, window_rect, client_rect );
     rect->left   -= rc.left;
     rect->right  -= rc.right;
     rect->top    -= rc.top;