[epiphany] ephy-completion-model: use a cancellable with the history service

[Claudio Saavedra <csaavedra src gnome org>]

commit 14e79589e2990577107406fa9d91cdf3cc62c0cd
Author: Claudio Saavedra <csaavedra igalia com>
Date:   Wed Mar 14 16:44:34 2012 +0200

    ephy-completion-model: use a cancellable with the history service
    
    For two things: first, cancel pending operations if a new search term
    is given before this is complete and, second, to cancel any operation
    remaining during the model disposal.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=672073

 src/ephy-completion-model.c |   15 ++++++++++++++-
 1 files changed, 14 insertions(+), 1 deletions(-)
---
diff --git a/src/ephy-completion-model.c b/src/ephy-completion-model.c
index 7ab7619..aa68bf7 100644
--- a/src/ephy-completion-model.c
+++ b/src/ephy-completion-model.c
@@ -34,6 +34,7 @@ G_DEFINE_TYPE (EphyCompletionModel, ephy_completion_model, GTK_TYPE_LIST_STORE)
 
 struct _EphyCompletionModelPrivate {
   EphyHistoryService *history_service;
+  GCancellable *cancellable;
 
   EphyNode *bookmarks;
   GSList *search_terms;
@@ -72,6 +73,11 @@ ephy_completion_model_finalize (GObject *object)
     priv->search_terms = NULL;
   }
 
+  if (priv->cancellable) {
+    g_cancellable_cancel (priv->cancellable);
+    g_clear_object (&priv->cancellable);
+  }
+
   G_OBJECT_CLASS (ephy_completion_model_parent_class)->finalize (object);
 }
 
@@ -418,6 +424,7 @@ query_completed_cb (EphyHistoryService *service,
   g_slice_free (FindURLsData, user_data);
   g_list_free_full (urls, (GDestroyNotify)ephy_history_url_free);
   g_slist_free_full (list, (GDestroyNotify)free_potential_row);
+  g_clear_object (&priv->cancellable);
 }
 
 static void
@@ -534,10 +541,16 @@ ephy_completion_model_update_for_string (EphyCompletionModel *model,
   user_data->callback = callback;
   user_data->user_data = data;
 
+  if (priv->cancellable) {
+    g_cancellable_cancel (priv->cancellable);
+    g_object_unref (priv->cancellable);
+  }
+  priv->cancellable = g_cancellable_new ();
+
   ephy_history_service_find_urls (priv->history_service,
                                   0, 0,
                                   MAX_COMPLETION_HISTORY_URLS, 0,
-                                  query, NULL,
+                                  query, priv->cancellable,
                                   (EphyHistoryJobCallback)query_completed_cb,
                                   user_data);
 }