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-rw-r--r--calendar/cal-util/calobj.c108
-rw-r--r--calendar/cal-util/calobj.h5
2 files changed, 113 insertions, 0 deletions
diff --git a/calendar/cal-util/calobj.c b/calendar/cal-util/calobj.c
index 03862d1dd1..1634ec084e 100644
--- a/calendar/cal-util/calobj.c
+++ b/calendar/cal-util/calobj.c
@@ -21,6 +21,8 @@
/* VCalendar product ID */
#define PRODID "-//Helix Code//NONSGML Evolution Calendar//EN"
+static gint compare_exdates (gconstpointer a, gconstpointer b);
+
static char *
@@ -1224,6 +1226,10 @@ ical_object_generate_events (iCalObject *ico, time_t start, time_t end, calendar
if (!ico->recur) {
if ((end && (ico->dtstart < end) && (ico->dtend > start))
|| ((end == 0) && (ico->dtend > start))) {
+ /* The new calendar views expect the times to not be
+ clipped, so they can show that it continues past
+ the end of the viewable area. */
+#if 0
time_t ev_s, ev_e;
/* Clip range */
@@ -1232,6 +1238,9 @@ ical_object_generate_events (iCalObject *ico, time_t start, time_t end, calendar
ev_e = MIN (ico->dtend, end);
(* cb) (ico, ev_s, ev_e, closure);
+#else
+ (* cb) (ico, ico->dtstart, ico->dtend, closure);
+#endif
}
return;
}
@@ -1631,3 +1640,102 @@ ical_object_to_string (iCalObject *ico)
return gbuf;
}
+
+
+/**
+ * ical_object_compare_dates:
+ * @ico1: A calendar event.
+ * @ico2: A calendar event to compare with @ico1.
+ *
+ * Returns TRUE if the dates of both objects match, including any recurrence
+ * rules. Both calendar objects must have a type of ICAL_EVENT.
+ *
+ * Return value: TRUE if both calendar objects have the same dates.
+ **/
+gboolean
+ical_object_compare_dates (iCalObject *ico1,
+ iCalObject *ico2)
+{
+ Recurrence *recur1, *recur2;
+ gint num_exdates;
+ GList *elem1, *elem2;
+ time_t *time1, *time2;
+
+ g_return_val_if_fail (ico1 != NULL, FALSE);
+ g_return_val_if_fail (ico2 != NULL, FALSE);
+ g_return_val_if_fail (ico1->type == ICAL_EVENT, FALSE);
+ g_return_val_if_fail (ico2->type == ICAL_EVENT, FALSE);
+
+ /* First check the base dates. */
+ if (ico1->dtstart != ico2->dtstart
+ || ico1->dtend != ico2->dtend)
+ return FALSE;
+
+ recur1 = ico1->recur;
+ recur2 = ico2->recur;
+
+ /* If the event doesn't recur, we already know it matches. */
+ if (!recur1 && !recur2)
+ return TRUE;
+
+ /* Check that both recur. */
+ if (!(recur1 && recur2))
+ return FALSE;
+
+ /* Now we need to see if the recurrence rules are the same. */
+ if (recur1->type != recur2->type
+ || recur1->interval != recur2->interval
+ || recur1->enddate != recur2->enddate
+ || recur1->weekday != recur2->weekday
+ || recur1->duration != recur2->duration
+ || recur1->_enddate != recur2->_enddate
+ || recur1->__count != recur2->__count)
+ return FALSE;
+
+ switch (recur1->type) {
+ case RECUR_MONTHLY_BY_POS:
+ if (recur1->u.month_pos != recur2->u.month_pos)
+ return FALSE;
+ break;
+ case RECUR_MONTHLY_BY_DAY:
+ if (recur1->u.month_day != recur2->u.month_day)
+ return FALSE;
+ break;
+ default:
+ break;
+ }
+
+ /* Now check if the excluded dates match. */
+ num_exdates = g_list_length (ico1->exdate);
+ if (g_list_length (ico2->exdate) != num_exdates)
+ return FALSE;
+ if (num_exdates == 0)
+ return TRUE;
+
+ ico1->exdate = g_list_sort (ico1->exdate, compare_exdates);
+ ico2->exdate = g_list_sort (ico2->exdate, compare_exdates);
+
+ elem1 = ico1->exdate;
+ elem2 = ico2->exdate;
+ while (elem1) {
+ time1 = (time_t*) elem1->data;
+ time2 = (time_t*) elem2->data;
+
+ if (*time1 != *time2)
+ return FALSE;
+
+ elem1 = elem1->next;
+ elem2 = elem2->next;
+ }
+
+ return TRUE;
+}
+
+
+static gint
+compare_exdates (gconstpointer a, gconstpointer b)
+{
+ const time_t *ca = a, *cb = b;
+ time_t diff = *ca - *cb;
+ return (diff < 0) ? -1 : (diff > 0) ? 1 : 0;
+}
diff --git a/calendar/cal-util/calobj.h b/calendar/cal-util/calobj.h
index cb0e22f741..0fa82ee36e 100644
--- a/calendar/cal-util/calobj.h
+++ b/calendar/cal-util/calobj.h
@@ -258,6 +258,11 @@ int ical_object_get_first_weekday (int weekday_mask);
/* Returns the number of seconds configured to trigger the alarm in advance to an event */
int alarm_compute_offset (CalendarAlarm *a);
+
+/* Returns TRUE if the dates of both objects match, including any recurrence
+ rules. */
+gboolean ical_object_compare_dates (iCalObject *ico1, iCalObject *ico2);
+
END_GNOME_DECLS
#endif