added virtual method to get a VTIMEZONE component given a TZID. We need

2001-07-03  Damon Chaplin  <damon@ximian.com>

	* pcs/cal-backend.[hc]: added virtual method to get a VTIMEZONE
	component given a TZID. We need this to resolve TZIDs when expanding
	an event using cal_recur_generate_instances() in query.c.

	* pcs/cal-backend-file.c (cal_backend_file_get_timezone): implemented
	virtual method.
	(cal_backend_file_update_object): fixed bug, kind -> child_kind.

	* pcs/query.c (func_occur_in_time_range): use the virtual method for
	resolving TZIDs. The other way didn't work anyway, as we didn't have
	the entire VCALENDAR with VTIMEZONEs in it.

	* gui/dialogs/recurrence-page.c (init_widgets):
	(make_ending_until_special): moved the call to
	e_date_edit_set_get_time_callback() from init_widgets to
	make_ending_until_special(), since that is where the widget gets
	created.

	* gui/e-timezone-entry.c (e_timezone_entry_set_timezone): handle zone
	being NULL.

svn path=/trunk/; revision=10732

1 files changed, 25 insertions, 0 deletions

diff --git a/calendar/pcs/cal-backend.c b/calendar/pcs/cal-backend.c
index a9eae9f212..1ca13028a9 100644
--- a/calendar/pcs/cal-backend.c
+++ b/calendar/pcs/cal-backend.c
@@ -588,3 +588,28 @@ cal_backend_obj_removed (CalBackend *backend, const char *uid)
 	gtk_signal_emit (GTK_OBJECT (backend), cal_backend_signals[OBJ_REMOVED],
 			 uid);
 }
+
+
+/**
+ * cal_backend_get_timezone:
+ * @backend: A calendar backend.
+ * @tzid: Unique identifier of a VTIMEZONE object. Note that this must not be
+ * NULL.
+ * 
+ * Returns the icaltimezone* corresponding to the TZID, or NULL if the TZID
+ * can't be found.
+ * 
+ * Return value: TRUE on success, FALSE on being passed an UID for an object
+ * that does not exist in the backend.
+ **/
+icaltimezone*
+cal_backend_get_timezone (CalBackend *backend, const char *tzid)
+{
+	g_return_val_if_fail (backend != NULL, NULL);
+	g_return_val_if_fail (IS_CAL_BACKEND (backend), NULL);
+	g_return_val_if_fail (tzid != NULL, NULL);
+
+	g_assert (CLASS (backend)->get_timezone != NULL);
+	return (* CLASS (backend)->get_timezone) (backend, tzid);
+}
+