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-rw-r--r--src/calendar.c25
1 files changed, 24 insertions, 1 deletions
diff --git a/src/calendar.c b/src/calendar.c
index df247df..3d7698e 100644
--- a/src/calendar.c
+++ b/src/calendar.c
@@ -77,6 +77,10 @@ static void (*draw_calendar[CAL_VIEWS]) (struct window *, struct date *,
unsigned) = {
draw_monthly_view, draw_weekly_view};
+static int monthly_view_cache[MAXDAYSPERMONTH];
+static int monthly_view_cache_valid = 0;
+static int monthly_view_cache_month = 0;
+
/* Switch between calendar views (monthly view is selected by default). */
void calendar_view_next(void)
{
@@ -264,6 +268,11 @@ static int date_change(struct tm *date, int delta_month, int delta_day)
}
}
+void calendar_monthly_view_cache_set_invalid(void)
+{
+ monthly_view_cache_valid = 0;
+}
+
/* Draw the monthly view inside calendar panel. */
static void
draw_monthly_view(struct window *cwin, struct date *current_day,
@@ -315,13 +324,25 @@ draw_monthly_view(struct window *cwin, struct date *current_day,
day_1_sav = (c_day_1 + 1) * 3 + c_day_1 - 7;
+ /* invalidate cache if a new month is selected */
+ if (yr * YEARINMONTHS + mo != monthly_view_cache_month) {
+ monthly_view_cache_month = yr * YEARINMONTHS + mo;
+ monthly_view_cache_valid = 0;
+ }
+
for (c_day = 1; c_day <= numdays; ++c_day, ++c_day_1, c_day_1 %= 7) {
check_day.dd = c_day;
check_day.mm = slctd_day.mm;
check_day.yyyy = slctd_day.yyyy;
/* check if the day contains an event or an appointment */
- item_this_day = day_check_if_item(check_day);
+ if (monthly_view_cache_valid) {
+ item_this_day = monthly_view_cache[c_day - 1];
+ }
+ else {
+ item_this_day = monthly_view_cache[c_day - 1] =
+ day_check_if_item(check_day);
+ }
/* Go to next line, the week is over. */
if (!c_day_1 && 1 != c_day) {
@@ -357,6 +378,8 @@ draw_monthly_view(struct window *cwin, struct date *current_day,
}
WINS_CALENDAR_UNLOCK;
}
+
+ monthly_view_cache_valid = 1;
}
static int weeknum(const struct tm *t, int firstweekday)