[gtk+] window: Ignore gtk_window_close calls from close-request handlers

[Timm Bäder <baedert src gnome org>]

commit 8a432b42a28167532b68f93c51e53174f0aa5ecb
Author: Timm Bäder <mail baedert org>
Date:   Thu Jan 18 15:10:49 2018 +0100

    window: Ignore gtk_window_close calls from close-request handlers

 gtk/gtkwindow.c |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkwindow.c b/gtk/gtkwindow.c
index 91e3bdb..d82d7da 100644
--- a/gtk/gtkwindow.c
+++ b/gtk/gtkwindow.c
@@ -264,6 +264,7 @@ struct _GtkWindowPrivate
 
   guint    use_subsurface            : 1;
   guint    hide_on_close             : 1;
+  guint    in_emit_close_request     : 1;
 
   GdkWindowTypeHint type_hint;
 
@@ -1363,6 +1364,9 @@ gtk_window_close (GtkWindow *window)
   if (!_gtk_widget_get_realized (GTK_WIDGET (window)))
     return;
 
+  if (window->priv->in_emit_close_request)
+    return;
+
   g_object_ref (window);
 
   if (!gtk_window_emit_close_request (window))
@@ -5982,9 +5986,17 @@ gtk_window_close_request (GtkWindow *window)
 static gboolean
 gtk_window_emit_close_request (GtkWindow *window)
 {
+  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
   gboolean handled;
 
+  /* Avoid re-entrancy issues when calling gtk_window_close from a
+   * close-request handler */
+  if (priv->in_emit_close_request)
+    return TRUE;
+
+  priv->in_emit_close_request = TRUE;
   g_signal_emit (window, window_signals[CLOSE_REQUEST], 0, &handled);
+  priv->in_emit_close_request = FALSE;
 
   return handled;
 }