/*
* Calcurse - text-based organizer
*
* Copyright (c) 2004-2017 calcurse Development Team <misc@calcurse.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Send your feedback or comments to : misc@calcurse.org
* Calcurse home page : http://calcurse.org
*
*/
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <time.h>
#include <math.h>
#include <langinfo.h>
#include "calcurse.h"
static struct date today, slctd_day;
static unsigned ui_calendar_view, week_begins_on_monday;
static pthread_mutex_t date_thread_mutex = PTHREAD_MUTEX_INITIALIZER;
static void draw_monthly_view(struct scrollwin *, struct date *, unsigned);
static void draw_weekly_view(struct scrollwin *, struct date *, unsigned);
static void (*draw_calendar[CAL_VIEWS]) (struct scrollwin *, 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 ui_calendar_view_next(void)
{
ui_calendar_view++;
if (ui_calendar_view == CAL_VIEWS)
ui_calendar_view = 0;
/* The calendar panel needs to be erased when switching views. */
werase(sw_cal.inner);
}
void ui_calendar_view_prev(void)
{
if (ui_calendar_view == 0)
ui_calendar_view = CAL_VIEWS;
ui_calendar_view--;
/* The calendar panel needs to be erased when switching views. */
werase(sw_cal.inner);
}
void ui_calendar_set_view(int view)
{
ui_calendar_view = (view < 0
|| view >= CAL_VIEWS) ? CAL_MONTH_VIEW : view;
}
int ui_calendar_get_view(void)
{
return (int)ui_calendar_view;
}
/* Thread needed to update current date in calendar. */
/* ARGSUSED0 */
static void *ui_calendar_date_thread(void *arg)
{
time_t actual, tomorrow;
for (;;) {
tomorrow = (time_t) (get_today() + DAYINSEC);
while ((actual = time(NULL)) < tomorrow)
sleep(tomorrow - actual);
ui_calendar_set_current_date();
ui_calendar_update_panel();
}
return NULL;
}
/* Launch the calendar date thread. */
void ui_calendar_start_date_thread(void)
{
pthread_create(&ui_calendar_t_date, NULL, ui_calendar_date_thread,
NULL);
}
/* Stop the calendar date thread. */
void ui_calendar_stop_date_thread(void)
{
/* Is the thread running? */
if (pthread_equal(ui_calendar_t_date, pthread_self()))
return;
pthread_cancel(ui_calendar_t_date);
pthread_join(ui_calendar_t_date, NULL);
ui_calendar_t_date = pthread_self();
}
/* Set static variable today to current date */
void ui_calendar_set_current_date(void)
{
time_t timer;
struct tm tm;
timer = time(NULL);
localtime_r(&timer, &tm);
pthread_mutex_lock(&date_thread_mutex);
today.dd = tm.tm_mday;
today.mm = tm.tm_mon + 1;
today.yyyy = tm.tm_year + 1900;
pthread_mutex_unlock(&date_thread_mutex);
}
/* Needed to display sunday or monday as the first day of week in calendar. */
void ui_calendar_set_first_day_of_week(enum wday first_day)
{
switch (first_day) {
case SUNDAY:
week_begins_on_monday = 0;
break;
case MONDAY:
week_begins_on_monday = 1;
break;
default:
ERROR_MSG(_("ERROR setting first day of week"));
week_begins_on_monday = 0;
/* NOTREACHED */
}
}
/* Swap first day of week in calendar. */
void ui_calendar_change_first_day_of_week(void)
{
week_begins_on_monday = !week_begins_on_monday;
}
/* Return 1 if week begins on monday, 0 otherwise. */
unsigned ui_calendar_week_begins_on_monday(void)
{
return week_begins_on_monday;
}
/* Fill in the given variable with the current date. */
void ui_calendar_store_current_date(struct date *date)
{
pthread_mutex_lock(&date_thread_mutex);
*date = today;
pthread_mutex_unlock(&date_thread_mutex);
}
/* This is to start at the current date in calendar. */
void ui_calendar_init_slctd_day(void)
{
ui_calendar_store_current_date(&slctd_day);
}
/* Return the selected day in calendar */
struct date *ui_calendar_get_slctd_day(void)
{
return &slctd_day;
}
/* Returned value represents the selected day in calendar (in seconds) */
time_t ui_calendar_get_slctd_day_sec(void)
{
return date2sec(slctd_day, 0, 0);
}
static int ui_calendar_get_wday(struct date *date)
{
struct tm t;
memset(&t, 0, sizeof(struct tm));
t.tm_mday = date->dd;
t.tm_mon = date->mm - 1;
t.tm_year = date->yyyy - 1900;
mktime(&t);
return t.tm_wday;
}
static unsigned months_to_days(unsigned month)
{
return (month * 3057 - 3007) / 100;
}
static long years_to_days(unsigned year)
{
return year * 365L + year / 4 - year / 100 + year / 400;
}
static long ymd_to_scalar(unsigned year, unsigned month, unsigned day)
{
long scalar;
scalar = day + months_to_days(month);
if (month > 2)
scalar -= ISLEAP(year) ? 1 : 2;
year--;
scalar += years_to_days(year);
return scalar;
}
void ui_calendar_monthly_view_cache_set_invalid(void)
{
monthly_view_cache_valid = 0;
}
static int weeknum(const struct tm *t, int firstweekday)
{
int wday, wnum;
wday = t->tm_wday;
if (firstweekday == MONDAY) {
if (wday == SUNDAY)
wday = 6;
else
wday--;
}
wnum = ((t->tm_yday + WEEKINDAYS - wday) / WEEKINDAYS);
if (wnum < 0)
wnum = 0;
return wnum;
}
/*
* Compute the week number according to ISO 8601.
*/
static int ISO8601weeknum(const struct tm *t)
{
int wnum, jan1day;
wnum = weeknum(t, MONDAY);
jan1day = t->tm_wday - (t->tm_yday % WEEKINDAYS);
if (jan1day < 0)
jan1day += WEEKINDAYS;
switch (jan1day) {
case MONDAY:
break;
case TUESDAY:
case WEDNESDAY:
case THURSDAY:
wnum++;
break;
case FRIDAY:
case SATURDAY:
case SUNDAY:
if (wnum == 0) {
/* Get week number of last week of last year. */
struct tm dec31ly; /* 12/31 last year */
dec31ly = *t;
dec31ly.tm_year--;
dec31ly.tm_mon = 11;
dec31ly.tm_mday = 31;
dec31ly.tm_wday =
(jan1day == SUNDAY) ? 6 : jan1day - 1;
dec31ly.tm_yday =
364 + ISLEAP(dec31ly.tm_year + 1900);
wnum = ISO8601weeknum(&dec31ly);
}
break;
}
if (t->tm_mon == 11) {
int wday, mday;
wday = t->tm_wday;
mday = t->tm_mday;
if ((wday == MONDAY && (mday >= 29 && mday <= 31))
|| (wday == TUESDAY && (mday == 30 || mday == 31))
|| (wday == WEDNESDAY && mday == 31))
wnum = 1;
}
return wnum;
}
static struct tm get_first_weekday(unsigned sunday_first)
{
int c_wday, days_to_remove;
struct tm t;
c_wday = ui_calendar_get_wday(&slctd_day);
if (sunday_first)
days_to_remove = c_wday;
else
days_to_remove = c_wday == 0 ? WEEKINDAYS - 1 : c_wday - 1;
t = date2tm(slctd_day, 0, 0);
date_change(&t, 0, -days_to_remove);
return t;
}
static void draw_week_number(struct scrollwin *sw, struct tm t)
{
int weeknum = ISO8601weeknum(&t);
WINS_CALENDAR_LOCK;
custom_apply_attr(sw->win, ATTR_HIGHEST);
mvwprintw(sw->win, conf.compact_panels ? 0 : 2, sw->w - 9,
"(# %02d)", weeknum);
custom_remove_attr(sw->win, ATTR_HIGHEST);
WINS_CALENDAR_UNLOCK;
}
/* Draw the monthly view inside calendar panel. */
static void
draw_monthly_view(struct scrollwin *sw, struct date *current_day,
unsigned sunday_first)
{
struct date check_day;
int c_day, c_day_1, day_1_sav, numdays, j;
unsigned yr, mo;
int w, ofs_x, ofs_y;
int item_this_day = 0;
struct tm t;
char *cp;
mo = slctd_day.mm;
yr = slctd_day.yyyy;
/* offset for centering calendar in window */
w = wins_sbar_width() - 2;
ofs_y = 0;
ofs_x = (w - 27) / 2;
/* checking the number of days in february */
numdays = days[mo - 1];
if (2 == mo && ISLEAP(yr))
++numdays;
/*
* the first calendar day will be monday or sunday, depending on
* 'week_begins_on_monday' value
*/
c_day_1 =
(int)((ymd_to_scalar(yr, mo, 1 + sunday_first) -
(long)1) % 7L);
/* Print the week number, calculated from monday. */
t = get_first_weekday(0);
draw_week_number(sw, t);
/* Write the current month and year on top of the calendar */
WINS_CALENDAR_LOCK;
if (yr * YEARINMONTHS + mo != monthly_view_cache_month) {
/* erase the window if a new month is selected */
werase(sw_cal.inner);
}
custom_apply_attr(sw->inner, ATTR_HIGHEST);
cp = nl_langinfo(MON_1 + mo - 1);
mvwprintw(sw->inner, ofs_y, (w - (strlen(cp) + 5)) / 2,
"%s %d", cp, slctd_day.yyyy);
custom_remove_attr(sw->inner, ATTR_HIGHEST);
++ofs_y;
/* print the days, with regards to the first day of the week */
custom_apply_attr(sw->inner, ATTR_HIGHEST);
for (j = 0; j < WEEKINDAYS; j++) {
mvwaddstr(sw->inner, ofs_y, ofs_x + 4 * j,
nl_langinfo(ABDAY_1 + (1 + j - sunday_first) % WEEKINDAYS));
}
custom_remove_attr(sw->inner, ATTR_HIGHEST);
WINS_CALENDAR_UNLOCK;
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) {
unsigned attr;
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 */
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) {
ofs_y++;
ofs_x = (w - 27) / 2 - day_1_sav - 4 * c_day;
}
if (c_day == current_day->dd
&& current_day->mm == slctd_day.mm
&& current_day->yyyy == slctd_day.yyyy
&& current_day->dd != slctd_day.dd)
attr = ATTR_LOWEST;
else if (c_day == slctd_day.dd)
attr = ATTR_MIDDLE;
else if (item_this_day == 1)
attr = ATTR_LOW;
else if (item_this_day == 2)
attr = ATTR_TRUE;
else
attr = 0;
WINS_CALENDAR_LOCK;
if (attr)
custom_apply_attr(sw->inner, attr);
mvwprintw(sw->inner, ofs_y + 1,
ofs_x + day_1_sav + 4 * c_day + 1, "%2d", c_day);
if (attr)
custom_remove_attr(sw->inner, attr);
WINS_CALENDAR_UNLOCK;
}
monthly_view_cache_valid = 1;
}
/* Draw the weekly view inside calendar panel. */
static void
draw_weekly_view(struct scrollwin *sw, struct date *current_day,
unsigned sunday_first)
{
#define DAYSLICESNO 6
const int WCALWIDTH = 28;
struct tm t;
int OFFY, OFFX, j;
OFFY = 0;
OFFX = (wins_sbar_width() - 2 - WCALWIDTH) / 2;
/* Print the week number, calculated from monday. */
t = get_first_weekday(0);
draw_week_number(sw, t);
/* Now draw calendar view. */
for (j = 0; j < WEEKINDAYS; j++) {
/* get next day */
if (j == 0)
t = get_first_weekday(sunday_first);
else
date_change(&t, 0, 1);
struct date date;
unsigned attr, item_this_day;
int i, slices[DAYSLICESNO];
/* print the day names, with regards to the first day of the week */
custom_apply_attr(sw->inner, ATTR_HIGHEST);
mvwaddstr(sw->inner, OFFY, OFFX + 4 * j,
nl_langinfo(ABDAY_1 + (1 + j - sunday_first) % WEEKINDAYS));
custom_remove_attr(sw->inner, ATTR_HIGHEST);
/* Check if the day to be printed has an item or not. */
date.dd = t.tm_mday;
date.mm = t.tm_mon + 1;
date.yyyy = t.tm_year + 1900;
item_this_day = day_check_if_item(date);
/* Print the day numbers with appropriate decoration. */
if (t.tm_mday == current_day->dd
&& current_day->mm == slctd_day.mm
&& current_day->yyyy == slctd_day.yyyy
&& current_day->dd != slctd_day.dd)
attr = ATTR_LOWEST;
else if (t.tm_mday == slctd_day.dd)
attr = ATTR_MIDDLE;
else if (item_this_day == 1)
attr = ATTR_LOW;
else if (item_this_day == 2)
attr = ATTR_TRUE;
else
attr = 0;
WINS_CALENDAR_LOCK;
if (attr)
custom_apply_attr(sw->inner, attr);
mvwprintw(sw->inner, OFFY + 1, OFFX + 1 + 4 * j, "%02d",
t.tm_mday);
if (attr)
custom_remove_attr(sw->inner, attr);
WINS_CALENDAR_UNLOCK;
/* Draw slices indicating appointment times. */
memset(slices, 0, DAYSLICESNO * sizeof *slices);
if (day_chk_busy_slices(date, DAYSLICESNO, slices)) {
for (i = 0; i < DAYSLICESNO; i++) {
if (j != WEEKINDAYS - 1
&& i != DAYSLICESNO - 1) {
WINS_CALENDAR_LOCK;
mvwhline(sw->inner, OFFY + 2 + i,
OFFX + 3 + 4 * j, ACS_S9,
2);
WINS_CALENDAR_UNLOCK;
}
if (slices[i]) {
int highlight;
highlight =
(t.tm_mday ==
slctd_day.dd) ? 1 : 0;
WINS_CALENDAR_LOCK;
if (highlight)
custom_apply_attr(sw->inner,
attr);
wattron(sw->inner, A_REVERSE);
mvwaddstr(sw->inner, OFFY + 2 + i,
OFFX + 1 + 4 * j, " ");
mvwaddstr(sw->inner, OFFY + 2 + i,
OFFX + 2 + 4 * j, " ");
wattroff(sw->inner, A_REVERSE);
if (highlight)
custom_remove_attr(sw->inner,
attr);
WINS_CALENDAR_UNLOCK;
}
}
}
}
/* Draw marks to indicate midday on the sides of the calendar. */
WINS_CALENDAR_LOCK;
custom_apply_attr(sw->inner, ATTR_HIGHEST);
mvwhline(sw->inner, OFFY + 1 + DAYSLICESNO / 2, OFFX, ACS_S9, 1);
mvwhline(sw->inner, OFFY + 1 + DAYSLICESNO / 2,
OFFX + WCALWIDTH - 1, ACS_S9, 1);
custom_remove_attr(sw->inner, ATTR_HIGHEST);
WINS_CALENDAR_UNLOCK;
#undef DAYSLICESNO
}
/* Function used to display the calendar panel. */
void ui_calendar_update_panel(void)
{
struct date current_day;
unsigned sunday_first;
ui_calendar_store_current_date(¤t_day);
sunday_first = !ui_calendar_week_begins_on_monday();
draw_calendar[ui_calendar_view] (&sw_cal, ¤t_day, sunday_first);
wins_scrollwin_display(&sw_cal, NOHILT);
}
/* Set the selected day in calendar to current day. */
void ui_calendar_goto_today(void)
{
struct date today;
ui_calendar_store_current_date(&today);
slctd_day.dd = today.dd;
slctd_day.mm = today.mm;
slctd_day.yyyy = today.yyyy;
}
/*
* Ask for a date to jump to, then check the correctness of that date
* and jump to it.
* If the entered date is empty, automatically jump to the current date.
* slctd_day is updated with the newly selected date.
*/
void ui_calendar_change_day(int datefmt)
{
#define LDAY 11
char selected_day[LDAY] = "";
char *outstr;
int dday, dmonth, dyear;
int wrong_day = 1;
const char *mesg_line1 = _("The day you entered is not valid");
const char *mesg_line2 = _("Press [ENTER] to continue");
const char *request_date =
_("Enter the day to go to [ENTER for today] : %s");
while (wrong_day) {
asprintf(&outstr, request_date, DATEFMT_DESC(datefmt));
status_mesg(outstr, "");
mem_free(outstr);
if (getstring(win[STA].p, selected_day, LDAY, 0, 1) ==
GETSTRING_ESC) {
return;
} else {
if (strlen(selected_day) == 0) {
wrong_day = 0;
ui_calendar_goto_today();
} else
if (parse_date
(selected_day, datefmt, &dyear, &dmonth,
&dday, ui_calendar_get_slctd_day())) {
wrong_day = 0;
/* go to chosen day */
slctd_day.dd = dday;
slctd_day.mm = dmonth;
slctd_day.yyyy = dyear;
}
if (wrong_day) {
status_mesg(mesg_line1, mesg_line2);
keys_wait_for_any_key(win[KEY].p);
}
}
}
return;
}
void ui_calendar_move(enum move move, int count)
{
int ret, days_to_remove, days_to_add;
struct tm t;
memset(&t, 0, sizeof(struct tm));
t.tm_mday = slctd_day.dd;
t.tm_mon = slctd_day.mm - 1;
t.tm_year = slctd_day.yyyy - 1900;
switch (move) {
case DAY_PREV:
ret = date_change(&t, 0, -count);
break;
case DAY_NEXT:
ret = date_change(&t, 0, count);
break;
case WEEK_PREV:
ret = date_change(&t, 0, -count * WEEKINDAYS);
break;
case WEEK_NEXT:
ret = date_change(&t, 0, count * WEEKINDAYS);
break;
case MONTH_PREV:
ret = date_change(&t, -count, 0);
break;
case MONTH_NEXT:
ret = date_change(&t, count, 0);
break;
case YEAR_PREV:
ret = date_change(&t, -count * YEARINMONTHS, 0);
break;
case YEAR_NEXT:
ret = date_change(&t, count * YEARINMONTHS, 0);
break;
case WEEK_START:
/* Normalize struct tm to get week day number. */
mktime(&t);
if (ui_calendar_week_begins_on_monday())
days_to_remove =
((t.tm_wday ==
0) ? WEEKINDAYS - 1 : t.tm_wday - 1);
else
days_to_remove =
((t.tm_wday == 0) ? 0 : t.tm_wday);
days_to_remove += (count - 1) * WEEKINDAYS;
ret = date_change(&t, 0, -days_to_remove);
break;
case WEEK_END:
mktime(&t);
if (ui_calendar_week_begins_on_monday())
days_to_add =
((t.tm_wday ==
0) ? 0 : WEEKINDAYS - t.tm_wday);
else
days_to_add = ((t.tm_wday == 0) ?
WEEKINDAYS - 1 : WEEKINDAYS - 1 -
t.tm_wday);
days_to_add += (count - 1) * WEEKINDAYS;
ret = date_change(&t, 0, days_to_add);
break;
default:
ret = 1;
/* NOTREACHED */
}
if (ret == 1 || (YEAR1902_2037 && t.tm_year < 2)
|| (YEAR1902_2037 && t.tm_year > 137)) {
char *out, *msg = _("The move failed (%d/%d/%d, ret=%d)."), ch;
asprintf(&out, msg, t.tm_mday, t.tm_mon + 1, t.tm_year + 1900, ret);
do {
status_mesg(out, _("Press [ENTER] to continue"));
ch = keys_wgetch(win[KEY].p);
} while (ch != '\n');
mem_free(out);
wins_update(FLAG_STA);
if (t.tm_year < 2) {
t.tm_mday = 1;
t.tm_mon = 0;
t.tm_year = 2;
}
if (t.tm_year > 137) {
t.tm_mday = 31;
t.tm_mon = 11;
t.tm_year = 137;
}
}
slctd_day.dd = t.tm_mday;
slctd_day.mm = t.tm_mon + 1;
slctd_day.yyyy = t.tm_year + 1900;
}
/* Returns the beginning of current year as a long. */
long ui_calendar_start_of_year(void)
{
time_t timer;
struct tm tm;
timer = time(NULL);
localtime_r(&timer, &tm);
tm.tm_mon = 0;
tm.tm_mday = 1;
tm.tm_hour = 0;
tm.tm_min = 0;
tm.tm_sec = 0;
timer = mktime(&tm);
return (long)timer;
}
long ui_calendar_end_of_year(void)
{
time_t timer;
struct tm tm;
timer = time(NULL);
localtime_r(&timer, &tm);
tm.tm_mon = 0;
tm.tm_mday = 1;
tm.tm_hour = 0;
tm.tm_min = 0;
tm.tm_sec = 0;
tm.tm_year++;
timer = mktime(&tm);
return (long)(timer - 1);
}