[epiphany/gnome-3-26] notification: Destroy widget when close button is clicked

[Gabriel Ivașcu <gabrielivascu src gnome org>]

commit ea1e546db9efebcc89fe3f46a2b031e4c603452c
Author: Gabriel Ivascu <gabrielivascu gnome org>
Date:   Sun Dec 10 14:11:04 2017 +0200

    notification: Destroy widget when close button is clicked
    
    https://bugzilla.gnome.org/show_bug.cgi?id=790094

 lib/ephy-notification-container.c |   15 +++++++++++++++
 lib/ephy-notification-container.h |    1 +
 lib/ephy-notification.c           |    9 +++++++--
 3 files changed, 23 insertions(+), 2 deletions(-)
---
diff --git a/lib/ephy-notification-container.c b/lib/ephy-notification-container.c
index 1fdce67..8591f2d 100644
--- a/lib/ephy-notification-container.c
+++ b/lib/ephy-notification-container.c
@@ -79,3 +79,18 @@ ephy_notification_container_add_notification (EphyNotificationContainer *self,
   gtk_widget_show_all (GTK_WIDGET (self));
   gtk_revealer_set_reveal_child (GTK_REVEALER (self), TRUE);
 }
+
+guint
+ephy_notification_container_get_num_children (EphyNotificationContainer *self)
+{
+  GList *children;
+  guint retval;
+
+  g_assert (EPHY_IS_NOTIFICATION_CONTAINER (self));
+
+  children = gtk_container_get_children (GTK_CONTAINER (self->grid));
+  retval = g_list_length (children);
+  g_list_free (children);
+
+  return retval;
+}
diff --git a/lib/ephy-notification-container.h b/lib/ephy-notification-container.h
index dc4348e..5cb5b43 100644
--- a/lib/ephy-notification-container.h
+++ b/lib/ephy-notification-container.h
@@ -32,5 +32,6 @@ EphyNotificationContainer *ephy_notification_container_get_default      (void);
 
 void                       ephy_notification_container_add_notification (EphyNotificationContainer *self,
                                                                          GtkWidget                 
*notification);
+guint                      ephy_notification_container_get_num_children (EphyNotificationContainer *self);
 
 G_END_DECLS
diff --git a/lib/ephy-notification.c b/lib/ephy-notification.c
index 68d45c4..fa1a08f 100644
--- a/lib/ephy-notification.c
+++ b/lib/ephy-notification.c
@@ -118,8 +118,13 @@ close_button_clicked_cb (GtkButton        *button,
 {
   EphyNotificationContainer *container = ephy_notification_container_get_default ();
 
-  gtk_widget_hide (GTK_WIDGET (container));
-  gtk_revealer_set_reveal_child (GTK_REVEALER (container), FALSE);
+  /* gtk_widget_destroy() removes the widget from its parent container. */
+  gtk_widget_destroy (GTK_WIDGET (self));
+
+  if (ephy_notification_container_get_num_children (container) == 0) {
+    gtk_widget_hide (GTK_WIDGET (container));
+    gtk_revealer_set_reveal_child (GTK_REVEALER (container), FALSE);
+  }
 }
 
 static void