[gtk/resizing-fixes] window: Set shadow size in ::compute-size

[Matthias Clasen <matthiasc src gnome org>]

commit e21a7d70f153c4530bb8e122cf943e89f143ddee
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Aug 12 08:00:34 2020 -0400

    window: Set shadow size in ::compute-size
    
    This is the new way of communicating shadow size.

 gtk/gtkwindow.c | 5 +++++
 1 file changed, 5 insertions(+)
---
diff --git a/gtk/gtkwindow.c b/gtk/gtkwindow.c
index d9620cd586..030f548dc7 100644
--- a/gtk/gtkwindow.c
+++ b/gtk/gtkwindow.c
@@ -4135,6 +4135,11 @@ toplevel_compute_size (GdkToplevel     *toplevel,
 
   get_shadow_width (window, &shadow);
 
+  if (priv->use_client_shadow)
+    gdk_toplevel_size_set_shadow_size (size,
+                                       shadow.left, shadow.right,
+                                       shadow.top, shadow.bottom);
+
   min_width = MIN (default_width + shadow.left + shadow.right, width);
   min_height = MIN (default_height + shadow.top + shadow.bottom, height);
   gdk_toplevel_size_set_min_size (size, min_width, min_height);