[epiphany] Drop duplicate message in notification container

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 8fba6d165ec9da7a6ae21299451b1c41cd65f7c9
Author: Jan-Michael Brummer <jan brummer tabos org>
Date:   Thu Jul 16 19:53:28 2020 +0200

    Drop duplicate message in notification container
    
    Fixes: https://gitlab.gnome.org/GNOME/epiphany/-/issues/446

 lib/ephy-notification-container.c | 14 ++++++++++++++
 lib/ephy-notification.c           |  7 +++++++
 lib/ephy-notification.h           |  3 +++
 3 files changed, 24 insertions(+)
---
diff --git a/lib/ephy-notification-container.c b/lib/ephy-notification-container.c
index d55d42d4b..2c31bbb9f 100644
--- a/lib/ephy-notification-container.c
+++ b/lib/ephy-notification-container.c
@@ -19,6 +19,7 @@
  */
 
 #include "config.h"
+#include "ephy-notification.h"
 #include "ephy-notification-container.h"
 
 struct _EphyNotificationContainer {
@@ -72,9 +73,22 @@ void
 ephy_notification_container_add_notification (EphyNotificationContainer *self,
                                               GtkWidget                 *notification)
 {
+  g_autoptr (GList) children = NULL;
+  GList *list;
+
   g_assert (EPHY_IS_NOTIFICATION_CONTAINER (self));
   g_assert (GTK_IS_WIDGET (notification));
 
+  children = gtk_container_get_children (GTK_CONTAINER (self->grid));
+  for (list = children; list && list->data; list = list->next) {
+    EphyNotification *child_notification = EPHY_NOTIFICATION (children->data);
+
+    if (ephy_notification_is_duplicate (child_notification, EPHY_NOTIFICATION (notification))) {
+      gtk_widget_destroy (notification);
+      return;
+    }
+  }
+
   gtk_container_add (GTK_CONTAINER (self->grid), notification);
   gtk_widget_show_all (GTK_WIDGET (self));
   gtk_revealer_set_reveal_child (GTK_REVEALER (self), TRUE);
diff --git a/lib/ephy-notification.c b/lib/ephy-notification.c
index 3df0f3a8e..ce014a5ec 100644
--- a/lib/ephy-notification.c
+++ b/lib/ephy-notification.c
@@ -213,3 +213,10 @@ ephy_notification_show (EphyNotification *self)
   ephy_notification_container_add_notification (ephy_notification_container_get_default (),
                                                 GTK_WIDGET (self));
 }
+
+gboolean
+ephy_notification_is_duplicate (EphyNotification *notification_a,
+                                EphyNotification *notification_b)
+{
+  return g_strcmp0 (notification_a->head_msg, notification_b->head_msg) == 0 && g_strcmp0 
(notification_a->body_msg, notification_b->body_msg) == 0;
+}
diff --git a/lib/ephy-notification.h b/lib/ephy-notification.h
index 2052a10e2..fa91569a3 100644
--- a/lib/ephy-notification.h
+++ b/lib/ephy-notification.h
@@ -33,4 +33,7 @@ EphyNotification *ephy_notification_new  (const char *head,
                                           const char *body);
 void              ephy_notification_show (EphyNotification *self);
 
+gboolean          ephy_notification_is_duplicate (EphyNotification *notification_a,
+                                                  EphyNotification *notification_b);
+
 G_END_DECLS