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src/recur.c: Support recurrent multi-day appointments

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Completely rewrite our inday algorithm in recur_item_inday() and be more
fine-grained. This version can deal with recurrent multi-day
appointments unless they overlap.

In case of overlapping appointments, only the last appointment that
starts before the current day is shown. We will need to rewrite the
whole recur_item_inday() interface in order to fix this - this
relatively trivial patch is only the first step.

Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
This commit is contained in:
Lukas Fleischer 2011-10-06 12:23:48 +02:00
parent 2d89d33668
commit 0d51e61f3d
1 changed files with 50 additions and 45 deletions
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95
src/recur.c
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@ -635,74 +635,79 @@ recur_item_inday (long item_start, long item_dur, llist_t *item_exc,
int rpt_type, int rpt_freq, long rpt_until, long day_start)
{
struct date start_date;
long day_end, diff;
struct tm lt_item, lt_day;
long diff, span;
struct tm lt_day, lt_item, lt_item_day;
time_t t;
day_end = day_start + DAYINSEC;
t = day_start;
lt_day = *localtime (&t);
if (LLIST_FIND_FIRST (item_exc, day_start, exc_inday))
if (day_start < item_start - DAYINSEC + 1)
return 0;
if (rpt_until == 0) /* we have an endless recurrent item */
rpt_until = day_end;
if (item_start > day_end || rpt_until < day_start)
return (0);
t = day_start;
lt_day = *localtime (&t);
t = item_start;
lt_item = *localtime (&t);
lt_item_day = lt_item;
lt_item_day.tm_sec = lt_item_day.tm_min = lt_item_day.tm_hour = 0;
span = (item_start - mktime (&lt_item_day) + item_dur - 1) / DAYINSEC;
switch (rpt_type)
{
case RECUR_DAILY:
diff = diff_days (lt_item, lt_day);
if (diff % rpt_freq != 0)
return (0);
lt_item.tm_mday = lt_day.tm_mday;
lt_item.tm_mon = lt_day.tm_mon;
lt_item.tm_year = lt_day.tm_year;
diff = diff_days (lt_item_day, lt_day) % rpt_freq;
lt_item_day.tm_mday = lt_day.tm_mday - diff;
lt_item_day.tm_mon = lt_day.tm_mon;
lt_item_day.tm_year = lt_day.tm_year;
break;
case RECUR_WEEKLY:
if (lt_item.tm_wday != lt_day.tm_wday)
return (0);
else
{
diff = diff_weeks (lt_item, lt_day);
if (diff % rpt_freq != 0)
return (0);
}
lt_item.tm_mday = lt_day.tm_mday;
lt_item.tm_mon = lt_day.tm_mon;
lt_item.tm_year = lt_day.tm_year;
diff = diff_days (lt_item_day, lt_day) % (rpt_freq * WEEKINDAYS);
lt_item_day.tm_mday = lt_day.tm_mday - diff;
lt_item_day.tm_mon = lt_day.tm_mon;
lt_item_day.tm_year = lt_day.tm_year;
break;
case RECUR_MONTHLY:
diff = diff_months (lt_item, lt_day);
if (diff % rpt_freq != 0)
return (0);
lt_item.tm_mon = lt_day.tm_mon;
lt_item.tm_year = lt_day.tm_year;
diff = diff_months (lt_item_day, lt_day) % rpt_freq;
if (lt_day.tm_mday < lt_item_day.tm_mday)
diff++;
lt_item_day.tm_mon = lt_day.tm_mon - diff;
lt_item_day.tm_year = lt_day.tm_year;
break;
case RECUR_YEARLY:
diff = diff_years (lt_item, lt_day);
if (diff % rpt_freq != 0)
return (0);
lt_item.tm_year = lt_day.tm_year;
diff = diff_years (lt_item_day, lt_day) % rpt_freq;
if (lt_day.tm_mon < lt_item_day.tm_mon ||
(lt_day.tm_mon == lt_item_day.tm_mon &&
lt_day.tm_mday < lt_item_day.tm_mday))
diff++;
lt_item_day.tm_year = lt_day.tm_year - diff;
break;
default:
EXIT (_("unknown item type"));
}
start_date.dd = lt_item.tm_mday;
start_date.mm = lt_item.tm_mon + 1;
start_date.yyyy = lt_item.tm_year + 1900;
item_start = date2sec (start_date, lt_item.tm_hour, lt_item.tm_min);
if (item_start < day_end && item_start >= day_start)
return (item_start);
lt_item_day.tm_isdst = lt_day.tm_isdst;
t = mktime (&lt_item_day);
if (LLIST_FIND_FIRST (item_exc, t, exc_inday))
return 0;
if (rpt_until != 0 && t > rpt_until)
return 0;
lt_item_day = *localtime (&t);
diff = diff_days (lt_item_day, lt_day);
if (diff <= span)
{
start_date.dd = lt_item_day.tm_mday;
start_date.mm = lt_item_day.tm_mon + 1;
start_date.yyyy = lt_item_day.tm_year + 1900;
return date2sec (start_date, lt_item.tm_hour, lt_item.tm_min);
}
else
return (0);
return 0;
}
unsigned