From f5e8d7a4e2563786769ef5e5ce50d7df0259dc10 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Timm=20B=C3=A4der?= <mail@baedert.org>
Date: Tue, 9 May 2017 08:32:06 +0200
Subject: [PATCH] window: Hide titlebox when undecorated

We don't draw or size-allocate the titlebar when the window is
fullscreen or undecorated, so reflect this by setting it to
!child_visible. This can happen when changing the value of the decorated
property while the window is shown.
---
 gtk/gtkwindow.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gtk/gtkwindow.c b/gtk/gtkwindow.c
index c9ca7faef6..9f6676c805 100644
--- a/gtk/gtkwindow.c
+++ b/gtk/gtkwindow.c
@@ -5806,7 +5806,8 @@ update_csd_visibility (GtkWindow *window)
   if (priv->title_box == NULL)
     return FALSE;
 
-  visible = !priv->fullscreen;
+  visible = !priv->fullscreen &&
+            priv->decorated;
 
   gtk_widget_set_child_visible (priv->title_box, visible);