ensure that contact_list_store_contact_active_cb isn't called after the store destruction

This is an exact port of similar code from empathy-individual-store.

https://bugzilla.gnome.org/show_bug.cgi?id=662211

diff --git a/libempathy-gtk/empathy-contact-list-store.c b/libempathy-gtk/empathy-contact-list-store.c
index 233a923cd3d3d61824ef83305fbdf862c9727349..ef4c466b315793468f9a416a643a96852a9e218b 100644 (file)
--- a/libempathy-gtk/empathy-contact-list-store.c
+++ b/libempathy-gtk/empathy-contact-list-store.c
@@ -80,6 +80,7 @@ typedef struct {
        EmpathyContactListStore *store;
        EmpathyContact          *contact;
        gboolean                remove;
+       guint                   timeout;
 } ShowActiveData;
 
 static void             contact_list_store_dispose                  (GObject                       *object);
@@ -1256,7 +1257,7 @@ contact_list_store_contact_update (EmpathyContactListStore *store,
 
                if (do_set_active) {
                        data = contact_list_store_contact_active_new (store, contact, do_remove);
-                       g_timeout_add_seconds (ACTIVE_USER_SHOW_TIME,
+                       data->timeout = g_timeout_add_seconds (ACTIVE_USER_SHOW_TIME,
                                               (GSourceFunc) contact_list_store_contact_active_cb,
                                               data);
                }
@@ -1315,6 +1316,24 @@ contact_list_store_contact_set_active (EmpathyContactListStore *store,
 
 }
 
+static void
+store_contact_active_invalidated (ShowActiveData *data,
+       GObject *old_object)
+{
+       /* Remove the timeout and free the struct, since the contact or contact
+        * store has disappeared. */
+       g_source_remove (data->timeout);
+
+        if (old_object == (GObject *) data->store)
+               data->store = NULL;
+        else if (old_object == (GObject *) data->contact)
+               data->contact = NULL;
+        else
+               g_assert_not_reached ();
+
+       contact_list_store_contact_active_free (data);
+}
+
 static ShowActiveData *
 contact_list_store_contact_active_new (EmpathyContactListStore *store,
                                       EmpathyContact          *contact,
@@ -1328,9 +1347,18 @@ contact_list_store_contact_active_new (EmpathyContactListStore *store,
 
        data = g_slice_new0 (ShowActiveData);
 
-       data->store = g_object_ref (store);
-       data->contact = g_object_ref (contact);
+       /* We don't actually want to force either the IndividualStore or the
+        * Individual to stay alive, since the user could quit Empathy or disable
+        * the account before the contact_active timeout is fired. */
+       g_object_weak_ref (G_OBJECT (store),
+               (GWeakNotify) store_contact_active_invalidated, data);
+       g_object_weak_ref (G_OBJECT (contact),
+               (GWeakNotify) store_contact_active_invalidated, data);
+
+       data->store = store;
+       data->contact = contact;
        data->remove = remove_;
+       data->timeout = 0;
 
        return data;
 }
@@ -1338,8 +1366,13 @@ contact_list_store_contact_active_new (EmpathyContactListStore *store,
 static void
 contact_list_store_contact_active_free (ShowActiveData *data)
 {
-       g_object_unref (data->contact);
-       g_object_unref (data->store);
+       if (data->store != NULL)
+               g_object_weak_unref (G_OBJECT (data->store),
+                       (GWeakNotify) store_contact_active_invalidated, data);
+
+       if (data->contact != NULL)
+               g_object_weak_unref (G_OBJECT (data->contact),
+                       (GWeakNotify) store_contact_active_invalidated, data);
 
        g_slice_free (ShowActiveData, data);
 }