From 4cb1b9645e84054c059f174240e8e288c4befe05 Mon Sep 17 00:00:00 2001
From: Olivier Fourdan <ofourdan@redhat.com>
Date: Mon, 19 Sep 2016 16:11:54 +0200
Subject: [PATCH] gtkwindow: Update shadow size on state change

Otherwise, with CSD, we could have a discrepancy where gtk uses the
right values for the shadows whereas the gdk backend still uses the old
values, leading in some cases to invalid or negative min size being
computed (which, in Wayland, leads a protocol error).

https://bugzilla.gnome.org/show_bug.cgi?id=771561
---
 gtk/gtkwindow.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/gtk/gtkwindow.c b/gtk/gtkwindow.c
index fc1e050f77..9808475f73 100644
--- a/gtk/gtkwindow.c
+++ b/gtk/gtkwindow.c
@@ -7528,6 +7528,19 @@ update_window_style_classes (GtkWindow *window)
     gtk_style_context_remove_class (context, "fullscreen");
 }
 
+static void
+update_window_borders (GtkWindow *window)
+{
+  GtkWindowPrivate *priv = window->priv;
+  GtkBorder window_border = { 0 };
+
+  if (priv->client_decorated && priv->use_client_shadow)
+    {
+      get_shadow_width (window, &window_border);
+      update_shadow_width (window, &window_border);
+    }
+}
+
 static void
 popover_size_allocate (GtkWidget        *widget,
                        GtkWindowPopover *popover,
@@ -7798,6 +7811,7 @@ gtk_window_state_event (GtkWidget           *widget,
     {
       update_window_style_classes (window);
       update_window_buttons (window);
+      update_window_borders (window);
       gtk_widget_queue_resize (widget);
     }