1 files changed, 75 insertions, 12 deletions

diff --git a/addressbook/backend/pas/pas-backend.c b/addressbook/backend/pas/pas-backend.c
index d8aa23fb37..3d315c2faf 100644
--- a/addressbook/backend/pas/pas-backend.c
+++ b/addressbook/backend/pas/pas-backend.c
@@ -7,45 +7,78 @@
 
 #include <config.h>
 #include <gtk/gtkobject.h>
+#include <gtk/gtksignal.h>
 #include "pas-backend.h"
 
 #define CLASS(o) PAS_BACKEND_CLASS (GTK_OBJECT (o)->klass)
 
+/* Signal IDs */
+enum {
+	LAST_CLIENT_GONE,
+	LAST_SIGNAL
+};
+
+static guint pas_backend_signals[LAST_SIGNAL];
+
+
 gboolean
 pas_backend_construct (PASBackend *backend)
 {
 	return TRUE;
 }
 
-void
+gboolean
 pas_backend_load_uri (PASBackend             *backend,
 		      const char             *uri)
 {
-	g_return_if_fail (backend != NULL);
-	g_return_if_fail (PAS_IS_BACKEND (backend));
-	g_return_if_fail (uri != NULL);
+	g_return_val_if_fail (backend != NULL, FALSE);
+	g_return_val_if_fail (PAS_IS_BACKEND (backend), FALSE);
+	g_return_val_if_fail (uri != NULL, FALSE);
 
 	g_assert (CLASS (backend)->load_uri != NULL);
 
-	CLASS (backend)->load_uri (backend, uri);
+	return (* CLASS (backend)->load_uri) (backend, uri);
+}
+
+/**
+ * pas_backend_get_uri:
+ * @backend: An addressbook backend.
+ * 
+ * Queries the URI that an addressbook backend is serving.
+ * 
+ * Return value: URI for the backend.
+ **/
+const char *
+pas_backend_get_uri (PASBackend *backend)
+{
+	g_return_val_if_fail (backend != NULL, NULL);
+	g_return_val_if_fail (PAS_IS_BACKEND (backend), NULL);
+
+	g_assert (CLASS (backend)->get_uri != NULL);
+
+	return (* CLASS (backend)->get_uri) (backend);
 }
 
 /**
  * pas_backend_add_client:
- * @backend:
- * @listener:
+ * @backend: An addressbook backend.
+ * @listener: Listener for notification to the client.
+ *
+ * Adds a client to an addressbook backend.
+ *
+ * Return value: TRUE on success, FALSE on failure to add the client.
  */
-void
+gboolean
 pas_backend_add_client (PASBackend             *backend,
 			Evolution_BookListener  listener)
 {
-	g_return_if_fail (backend != NULL);
-	g_return_if_fail (PAS_IS_BACKEND (backend));
-	g_return_if_fail (listener != CORBA_OBJECT_NIL);
+	g_return_val_if_fail (backend != NULL, FALSE);
+	g_return_val_if_fail (PAS_IS_BACKEND (backend), FALSE);
+	g_return_val_if_fail (listener != CORBA_OBJECT_NIL, FALSE);
 
 	g_assert (CLASS (backend)->add_client != NULL);
 
-	CLASS (backend)->add_client (backend, listener);
+	return CLASS (backend)->add_client (backend, listener);
 }
 
 void
@@ -62,6 +95,23 @@ pas_backend_remove_client (PASBackend *backend,
 	CLASS (backend)->remove_client (backend, book);
 }
 
+/**
+ * pas_backend_last_client_gone:
+ * @backend: An addressbook backend.
+ * 
+ * Emits the "last_client_gone" signal for the specified backend.  Should
+ * only be called from backend implementations if the backend really does
+ * not have any more clients.
+ **/
+void
+pas_backend_last_client_gone (PASBackend *backend)
+{
+	g_return_if_fail (backend != NULL);
+	g_return_if_fail (PAS_IS_BACKEND (backend));
+
+	gtk_signal_emit (GTK_OBJECT (backend), pas_backend_signals[LAST_CLIENT_GONE]);	
+}
+
 static void
 pas_backend_init (PASBackend *backend)
 {
@@ -70,6 +120,19 @@ pas_backend_init (PASBackend *backend)
 static void
 pas_backend_class_init (PASBackendClass *klass)
 {
+	GtkObjectClass *object_class;
+
+	object_class = (GtkObjectClass *) klass;
+
+	pas_backend_signals[LAST_CLIENT_GONE] =
+		gtk_signal_new ("last_client_gone",
+				GTK_RUN_FIRST,
+				object_class->type,
+				GTK_SIGNAL_OFFSET (PASBackendClass, last_client_gone),
+				gtk_marshal_NONE__NONE,
+				GTK_TYPE_NONE, 0);
+
+	gtk_object_class_add_signals (object_class, pas_backend_signals, LAST_SIGNAL);
 }
 
 /**