1 /*
2 * $Id: calendar.c,v 1.106 2020/11/23 09:03:49 tom Exp $
3 *
4 * calendar.c -- implements the calendar box
5 *
6 * Copyright 2001-2019,2020 Thomas E. Dickey
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU Lesser General Public License, version 2.1
10 * as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this program; if not, write to
19 * Free Software Foundation, Inc.
20 * 51 Franklin St., Fifth Floor
21 * Boston, MA 02110, USA.
22 */
23
24 #include <dlg_internals.h>
25 #include <dlg_keys.h>
26
27 #include <time.h>
28
29 #ifdef HAVE_STDINT_H
30 #include <stdint.h>
31 #else
32 #define intptr_t long
33 #endif
34
35 #define ONE_DAY (60 * 60 * 24)
36
37 #define MON_WIDE 4 /* width of a month-name */
38 #define DAY_HIGH 6 /* maximum lines in day-grid */
39 #define DAY_WIDE (8 * MON_WIDE) /* width of the day-grid */
40 #define HDR_HIGH 1 /* height of cells with month/year */
41 #define BTN_HIGH 1 /* height of button-row excluding margin */
42
43 /* two more lines: titles for day-of-week and month/year boxes */
44 #define MIN_HIGH (DAY_HIGH + 2 + HDR_HIGH + BTN_HIGH + (MAX_DAYS * MARGIN))
45 #define MIN_WIDE (DAY_WIDE + (4 * MARGIN))
46
47 typedef enum {
48 sMONTH = -3
49 ,sYEAR = -2
50 ,sDAY = -1
51 } STATES;
52
53 struct _box;
54
55 typedef int (*BOX_DRAW) (struct _box *, struct tm *);
56
57 typedef struct _box {
58 WINDOW *parent;
59 WINDOW *window;
60 int x;
61 int y;
62 int width;
63 int height;
64 BOX_DRAW box_draw;
65 int week_start;
66 } BOX;
67
68 #define MAX_DAYS 7
69 #define MAX_MONTHS 12
70
71 static char *cached_days[MAX_DAYS];
72 static char *cached_months[MAX_MONTHS];
73
74 static const char *
nameOfDayOfWeek(int n)75 nameOfDayOfWeek(int n)
76 {
77 static bool shown[MAX_DAYS];
78
79 while (n < 0) {
80 n += MAX_DAYS;
81 }
82 n %= MAX_DAYS;
83 #ifdef ENABLE_NLS
84 if (cached_days[n] == 0) {
85 const nl_item items[MAX_DAYS] =
86 {
87 ABDAY_1, ABDAY_2, ABDAY_3, ABDAY_4, ABDAY_5, ABDAY_6, ABDAY_7
88 };
89 cached_days[n] = dlg_strclone(nl_langinfo(items[n]));
90 memset(shown, 0, sizeof(shown));
91 }
92 #endif
93 if (cached_days[n] == 0) {
94 static const char *posix_days[MAX_DAYS] =
95 {
96 "Sunday",
97 "Monday",
98 "Tuesday",
99 "Wednesday",
100 "Thursday",
101 "Friday",
102 "Saturday"
103 };
104 size_t limit = MON_WIDE - 1;
105 char *value = dlg_strclone(posix_days[n]);
106
107 /*
108 * POSIX does not actually say what the length of an abbreviated name
109 * is. Typically it is 2, which will fit into our layout. That also
110 * happens to work with CJK entries as seen in glibc, which are a
111 * double-width cell. For now (2016/01/26), handle too-long names only
112 * for POSIX values.
113 */
114 if (strlen(value) > limit)
115 value[limit] = '\0';
116 cached_days[n] = value;
117 }
118 if (!shown[n]) {
119 DLG_TRACE(("# DAY(%d) = '%s'\n", n, cached_days[n]));
120 shown[n] = TRUE;
121 }
122 return cached_days[n];
123 }
124
125 static const char *
nameOfMonth(int n)126 nameOfMonth(int n)
127 {
128 static bool shown[MAX_MONTHS];
129
130 while (n < 0) {
131 n += MAX_MONTHS;
132 }
133 n %= MAX_MONTHS;
134 #ifdef ENABLE_NLS
135 if (cached_months[n] == 0) {
136 const nl_item items[MAX_MONTHS] =
137 {
138 MON_1, MON_2, MON_3, MON_4, MON_5, MON_6,
139 MON_7, MON_8, MON_9, MON_10, MON_11, MON_12
140 };
141 cached_months[n] = dlg_strclone(nl_langinfo(items[n]));
142 memset(shown, 0, sizeof(shown));
143 }
144 #endif
145 if (cached_months[n] == 0) {
146 static const char *posix_mons[MAX_MONTHS] =
147 {
148 "January",
149 "February",
150 "March",
151 "April",
152 "May",
153 "June",
154 "July",
155 "August",
156 "September",
157 "October",
158 "November",
159 "December"
160 };
161 cached_months[n] = dlg_strclone(posix_mons[n]);
162 }
163 if (!shown[n]) {
164 DLG_TRACE(("# MON(%d) = '%s'\n", n, cached_months[n]));
165 shown[n] = TRUE;
166 }
167 return cached_months[n];
168 }
169
170 /*
171 * Algorithm for Gregorian calendar.
172 */
173 static int
isleap(int y)174 isleap(int y)
175 {
176 return ((y % 4 == 0) &&
177 ((y % 100 != 0) ||
178 (y % 400 == 0))) ? 1 : 0;
179 }
180
181 static void
adjust_year_month(int * year,int * month)182 adjust_year_month(int *year, int *month)
183 {
184 while (*month < 0) {
185 *month += MAX_MONTHS;
186 *year -= 1;
187 }
188 while (*month >= MAX_MONTHS) {
189 *month -= MAX_MONTHS;
190 *year += 1;
191 }
192 }
193
194 static int
days_per_month(int year,int month)195 days_per_month(int year, int month)
196 {
197 static const int nominal[] =
198 {
199 31, 28, 31, 30, 31, 30,
200 31, 31, 30, 31, 30, 31
201 };
202 int result;
203
204 adjust_year_month(&year, &month);
205 result = nominal[month];
206 if (month == 1)
207 result += isleap(year);
208 return result;
209 }
210
211 static int
days_in_month(struct tm * current,int offset)212 days_in_month(struct tm *current, int offset /* -1, 0, 1 */ )
213 {
214 int year = current->tm_year + 1900;
215 int month = current->tm_mon + offset;
216
217 adjust_year_month(&year, &month);
218 return days_per_month(year, month);
219 }
220
221 static int
days_per_year(int year)222 days_per_year(int year)
223 {
224 return (isleap(year) ? 366 : 365);
225 }
226
227 static int
days_in_year(struct tm * current,int offset)228 days_in_year(struct tm *current, int offset /* -1, 0, 1 */ )
229 {
230 return days_per_year(current->tm_year + 1900 + offset);
231 }
232
233 /*
234 * Adapted from C FAQ
235 * "17.28: How can I find the day of the week given the date?"
236 * implementation by Tomohiko Sakamoto.
237 *
238 * d = day (0 to whatever)
239 * m = month (1 through 12)
240 * y = year (1752 and later, for Gregorian calendar)
241 */
242 static int
day_of_week(int y,int m,int d)243 day_of_week(int y, int m, int d)
244 {
245 static int t[] =
246 {
247 0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4
248 };
249 y -= (m < 3);
250 return (6 + (y + (y / 4) - (y / 100) + (y / 400) + t[m - 1] + d)) % MAX_DAYS;
251 }
252
253 static int
day_in_year(int year,int month,int day)254 day_in_year(int year, int month, int day)
255 {
256 int result = day;
257 while (--month >= 1)
258 result += days_per_month(year, month);
259 return result;
260 }
261
262 static int
iso_week(int year,int month,int day)263 iso_week(int year, int month, int day)
264 {
265 int week = 1;
266 int dow;
267 int new_year_dow;
268 int diy;
269 int new_years_eve_dow;
270 static const int thursday = 3;
271
272 /* add the number weeks *between* date and newyear */
273 diy = day_in_year(year, month, day);
274 week += (diy - 1) / MAX_DAYS;
275
276 /* 0 = Monday */
277 dow = day_of_week(year, month, day);
278 new_year_dow = day_of_week(year, 1, 1);
279
280 /*
281 * If New Year falls on Friday, Saturday or Sunday, then New Years's week
282 * is the last week of the preceding year. In that case subtract one week.
283 */
284 if (new_year_dow > thursday)
285 --week;
286
287 /* Add one week if there is a Sunday to Monday transition. */
288 if (dow - new_year_dow < 0)
289 ++week;
290
291 /* Check if we are in the last week of the preceding year. */
292 if (week < 1) {
293 week = iso_week(--year, 12, 31);
294 }
295
296 /*
297 * If we are in the same week as New Year's eve, check if New Year's eve is
298 * in the first week of the next year.
299 */
300 new_years_eve_dow = (new_year_dow + 364 + isleap(year)) % MAX_DAYS;
301 if (365 + isleap(year) - diy < MAX_DAYS
302 && new_years_eve_dow >= dow
303 && new_years_eve_dow < thursday) {
304 week = 1;
305 }
306 return week;
307 }
308
309 static int *
getisoweeks(int year,int month)310 getisoweeks(int year, int month)
311 {
312 static int result[10];
313 int windx = 0;
314 int day;
315 int dpm = days_per_month(year, month);
316
317 for (day = 1; day <= dpm; day += MAX_DAYS)
318 result[windx++] = iso_week(year, month, day);
319 /*
320 * Ensure that there is a week number associated with the last day of the
321 * month, e.g., in case the last day of the month falls before Thursday,
322 * so that we have to show the week-number for the beginning of the
323 * following month.
324 */
325 result[windx] = iso_week(year, month, dpm);
326 return result;
327 }
328
329 static int
day_cell_number(struct tm * current)330 day_cell_number(struct tm *current)
331 {
332 int cell;
333 cell = current->tm_mday - ((6 + current->tm_mday - current->tm_wday) % MAX_DAYS);
334 if ((current->tm_mday - 1) % MAX_DAYS != current->tm_wday)
335 cell += 6;
336 else
337 cell--;
338 return cell;
339 }
340
341 static int
next_or_previous(int key,int two_d)342 next_or_previous(int key, int two_d)
343 {
344 int result = 0;
345
346 switch (key) {
347 case DLGK_GRID_UP:
348 result = two_d ? -MAX_DAYS : -1;
349 break;
350 case DLGK_GRID_LEFT:
351 result = -1;
352 break;
353 case DLGK_GRID_DOWN:
354 result = two_d ? MAX_DAYS : 1;
355 break;
356 case DLGK_GRID_RIGHT:
357 result = 1;
358 break;
359 default:
360 beep();
361 break;
362 }
363 return result;
364 }
365
366 /*
367 * Draw the day-of-month selection box
368 */
369 static int
draw_day(BOX * data,struct tm * current)370 draw_day(BOX * data, struct tm *current)
371 {
372 int cell_wide = MON_WIDE;
373 int y, x, this_x;
374 int save_y = 0, save_x = 0;
375 int day = current->tm_mday;
376 int mday;
377 int week = 0;
378 int windx = 0;
379 int *weeks = 0;
380 int last = days_in_month(current, 0);
381 int prev = days_in_month(current, -1);
382
383 werase(data->window);
384 dlg_draw_box2(data->parent,
385 data->y - MARGIN, data->x - MARGIN,
386 data->height + (2 * MARGIN), data->width + (2 * MARGIN),
387 menubox_attr,
388 menubox_border_attr,
389 menubox_border2_attr);
390
391 dlg_attrset(data->window, menubox_attr); /* daynames headline */
392 for (x = 0; x < MAX_DAYS; x++) {
393 mvwprintw(data->window,
394 0, (x + 1) * cell_wide, "%*.*s ",
395 cell_wide - 1,
396 cell_wide - 1,
397 nameOfDayOfWeek(x + data->week_start));
398 }
399
400 mday = ((6 + current->tm_mday -
401 current->tm_wday +
402 data->week_start) % MAX_DAYS) - MAX_DAYS;
403 if (mday <= -MAX_DAYS)
404 mday += MAX_DAYS;
405
406 if (dialog_vars.iso_week) {
407 weeks = getisoweeks(current->tm_year + 1900, current->tm_mon + 1);
408 } else {
409 /* mday is now in the range -6 to 0. */
410 week = (current->tm_yday + 6 + mday - current->tm_mday) / MAX_DAYS;
411 }
412
413 for (y = 1; mday < last; y++) {
414 dlg_attrset(data->window, menubox_attr); /* weeknumbers headline */
415 mvwprintw(data->window,
416 y, 0,
417 "%*d ",
418 cell_wide - 1,
419 weeks ? weeks[windx++] : ++week);
420 for (x = 0; x < MAX_DAYS; x++) {
421 this_x = 1 + (x + 1) * cell_wide;
422 ++mday;
423 if (wmove(data->window, y, this_x) == ERR)
424 continue;
425 dlg_attrset(data->window, item_attr); /* not selected days */
426 if (mday == day) {
427 dlg_attrset(data->window, item_selected_attr); /* selected day */
428 save_y = y;
429 save_x = this_x;
430 }
431 if (mday > 0) {
432 if (mday <= last) {
433 wprintw(data->window, "%*d", cell_wide - 2, mday);
434 } else if (mday == day) {
435 wprintw(data->window, "%*d", cell_wide - 2, mday - last);
436 }
437 } else if (mday == day) {
438 wprintw(data->window, "%*d", cell_wide - 2, mday + prev);
439 }
440 }
441 wmove(data->window, save_y, save_x);
442 }
443 /* just draw arrows - scrollbar is unsuitable here */
444 dlg_draw_arrows(data->parent, TRUE, TRUE,
445 data->x + ARROWS_COL,
446 data->y - 1,
447 data->y + data->height);
448
449 return 0;
450 }
451
452 /*
453 * Draw the month-of-year selection box
454 */
455 static int
draw_month(BOX * data,struct tm * current)456 draw_month(BOX * data, struct tm *current)
457 {
458 int month;
459
460 month = current->tm_mon + 1;
461
462 dlg_attrset(data->parent, dialog_attr); /* Headline "Month" */
463 (void) mvwprintw(data->parent, data->y - 2, data->x - 1, _("Month"));
464 dlg_draw_box2(data->parent,
465 data->y - 1, data->x - 1,
466 data->height + 2, data->width + 2,
467 menubox_attr,
468 menubox_border_attr,
469 menubox_border2_attr);
470 dlg_attrset(data->window, item_attr); /* color the month selection */
471 mvwprintw(data->window, 0, 0, "%s", nameOfMonth(month - 1));
472 wmove(data->window, 0, 0);
473 return 0;
474 }
475
476 /*
477 * Draw the year selection box
478 */
479 static int
draw_year(BOX * data,struct tm * current)480 draw_year(BOX * data, struct tm *current)
481 {
482 int year = current->tm_year + 1900;
483
484 dlg_attrset(data->parent, dialog_attr); /* Headline "Year" */
485 (void) mvwprintw(data->parent, data->y - 2, data->x - 1, _("Year"));
486 dlg_draw_box2(data->parent,
487 data->y - 1, data->x - 1,
488 data->height + 2, data->width + 2,
489 menubox_attr,
490 menubox_border_attr,
491 menubox_border2_attr);
492 dlg_attrset(data->window, item_attr); /* color the year selection */
493 mvwprintw(data->window, 0, 0, "%4d", year);
494 wmove(data->window, 0, 0);
495 return 0;
496 }
497
498 static int
init_object(BOX * data,WINDOW * parent,int x,int y,int width,int height,BOX_DRAW box_draw,int key_offset,int code)499 init_object(BOX * data,
500 WINDOW *parent,
501 int x, int y,
502 int width, int height,
503 BOX_DRAW box_draw,
504 int key_offset,
505 int code)
506 {
507 data->parent = parent;
508 data->x = x;
509 data->y = y;
510 data->width = width;
511 data->height = height;
512 data->box_draw = box_draw;
513 data->week_start = key_offset;
514
515 data->window = dlg_der_window(data->parent,
516 data->height, data->width,
517 data->y, data->x);
518 if (data->window == 0)
519 return -1;
520
521 dlg_mouse_setbase(getbegx(parent), getbegy(parent));
522 if (code == 'D') {
523 dlg_mouse_mkbigregion(y + 1, x + MON_WIDE, height - 1, width - MON_WIDE,
524 KEY_MAX + key_offset, 1, MON_WIDE, 3);
525 } else {
526 dlg_mouse_mkregion(y, x, height, width, code);
527 }
528
529 return 0;
530 }
531
532 #if defined(ENABLE_NLS) && defined(HAVE_NL_LANGINFO_1STDAY)
533 #elif defined(HAVE_DLG_GAUGE)
534 static int
read_locale_setting(const char * name,int which)535 read_locale_setting(const char *name, int which)
536 {
537 FILE *fp;
538 char command[80];
539 int result = -1;
540
541 sprintf(command, "locale %s", name);
542 if ((fp = dlg_popen(command, "r")) != 0) {
543 int count = 0;
544 char buf[80];
545
546 while (fgets(buf, (int) sizeof(buf) - 1, fp) != 0) {
547 if (++count > which) {
548 char *next = 0;
549 long check = strtol(buf, &next, 0);
550 if (next != 0 &&
551 next != buf &&
552 *next == '\n') {
553 result = (int) check;
554 }
555 break;
556 }
557 }
558 pclose(fp);
559 }
560 return result;
561 }
562 #endif
563
564 static int
WeekStart(void)565 WeekStart(void)
566 {
567 int result = 0;
568 char *option = dialog_vars.week_start;
569 if (option != 0) {
570 if (option[0]) {
571 char *next = 0;
572 long check = strtol(option, &next, 0);
573 if (next == 0 ||
574 next == option ||
575 *next != '\0') {
576 if (!strcmp(option, "locale")) {
577 #if defined(ENABLE_NLS) && defined(HAVE_NL_LANGINFO_1STDAY)
578 /*
579 * glibc-specific.
580 */
581 int first_day = nl_langinfo(_NL_TIME_FIRST_WEEKDAY)[0];
582 char *basis_ptr = nl_langinfo(_NL_TIME_WEEK_1STDAY);
583 int basis_day = (int) (intptr_t) basis_ptr;
584 #elif defined(HAVE_DLG_GAUGE)
585 /*
586 * probably Linux-specific, but harmless otherwise. When
587 * available, the locale program will return a single
588 * integer on one line.
589 */
590 int first_day = read_locale_setting("first_weekday", 0);
591 int basis_day = read_locale_setting("week-1stday", 0);
592 #endif
593 #if (defined(ENABLE_NLS) && defined(HAVE_NL_LANGINFO_1STDAY)) || defined(HAVE_DLG_GAUGE)
594 int week_1stday = -1;
595 if (basis_day == 19971130)
596 week_1stday = 0; /* Sun */
597 else if (basis_day == 19971201)
598 week_1stday = 1; /* Mon */
599 if (week_1stday >= 0) {
600 result = first_day - week_1stday - 1;
601 }
602 #else
603 result = 0; /* Sun */
604 #endif
605 } else {
606 int day;
607 size_t eql = strlen(option);
608 for (day = 0; day < MAX_DAYS; ++day) {
609 if (!strncmp(nameOfDayOfWeek(day), option, eql)) {
610 result = day;
611 break;
612 }
613 }
614 }
615 } else if (check < 0) {
616 result = -1;
617 } else {
618 result = (int) (check % MAX_DAYS);
619 }
620 }
621 }
622 return result;
623 }
624
625 static int
CleanupResult(int code,WINDOW * dialog,char * prompt,DIALOG_VARS * save_vars)626 CleanupResult(int code, WINDOW *dialog, char *prompt, DIALOG_VARS * save_vars)
627 {
628 int n;
629
630 if (dialog != 0)
631 dlg_del_window(dialog);
632 dlg_mouse_free_regions();
633 if (prompt != 0)
634 free(prompt);
635 dlg_restore_vars(save_vars);
636
637 for (n = 0; n < MAX_DAYS; ++n) {
638 free(cached_days[n]);
639 cached_days[n] = 0;
640 }
641 for (n = 0; n < MAX_MONTHS; ++n) {
642 free(cached_months[n]);
643 cached_months[n] = 0;
644 }
645
646 return code;
647 }
648
649 static void
trace_date(struct tm * current,struct tm * old)650 trace_date(struct tm *current, struct tm *old)
651 {
652 bool changed = (old == 0 ||
653 current->tm_mday != old->tm_mday ||
654 current->tm_mon != old->tm_mon ||
655 current->tm_year != old->tm_year);
656 if (changed) {
657 DLG_TRACE(("# current %04d/%02d/%02d\n",
658 current->tm_year + 1900,
659 current->tm_mon + 1,
660 current->tm_mday));
661 } else {
662 DLG_TRACE(("# current (unchanged)\n"));
663 }
664 }
665
666 #define DrawObject(data) (data)->box_draw(data, ¤t)
667
668 /*
669 * Display a dialog box for entering a date
670 */
671 int
dialog_calendar(const char * title,const char * subtitle,int height,int width,int day,int month,int year)672 dialog_calendar(const char *title,
673 const char *subtitle,
674 int height,
675 int width,
676 int day,
677 int month,
678 int year)
679 {
680 /* *INDENT-OFF* */
681 static DLG_KEYS_BINDING binding[] = {
682 HELPKEY_BINDINGS,
683 ENTERKEY_BINDINGS,
684 TOGGLEKEY_BINDINGS,
685 DLG_KEYS_DATA( DLGK_FIELD_NEXT, TAB ),
686 DLG_KEYS_DATA( DLGK_FIELD_PREV, KEY_BTAB ),
687 DLG_KEYS_DATA( DLGK_GRID_DOWN, 'j' ),
688 DLG_KEYS_DATA( DLGK_GRID_DOWN, DLGK_MOUSE(KEY_NPAGE) ),
689 DLG_KEYS_DATA( DLGK_GRID_DOWN, KEY_DOWN ),
690 DLG_KEYS_DATA( DLGK_GRID_DOWN, KEY_NPAGE ),
691 DLG_KEYS_DATA( DLGK_GRID_LEFT, '-' ),
692 DLG_KEYS_DATA( DLGK_GRID_LEFT, 'h' ),
693 DLG_KEYS_DATA( DLGK_GRID_LEFT, CHR_BACKSPACE ),
694 DLG_KEYS_DATA( DLGK_GRID_LEFT, CHR_PREVIOUS ),
695 DLG_KEYS_DATA( DLGK_GRID_LEFT, KEY_LEFT ),
696 DLG_KEYS_DATA( DLGK_GRID_RIGHT, '+' ),
697 DLG_KEYS_DATA( DLGK_GRID_RIGHT, 'l' ),
698 DLG_KEYS_DATA( DLGK_GRID_RIGHT, CHR_NEXT ),
699 DLG_KEYS_DATA( DLGK_GRID_RIGHT, KEY_NEXT ),
700 DLG_KEYS_DATA( DLGK_GRID_RIGHT, KEY_RIGHT ),
701 DLG_KEYS_DATA( DLGK_GRID_UP, 'k' ),
702 DLG_KEYS_DATA( DLGK_GRID_UP, KEY_PPAGE ),
703 DLG_KEYS_DATA( DLGK_GRID_UP, KEY_PREVIOUS ),
704 DLG_KEYS_DATA( DLGK_GRID_UP, KEY_UP ),
705 DLG_KEYS_DATA( DLGK_GRID_UP, DLGK_MOUSE(KEY_PPAGE) ),
706 END_KEYS_BINDING
707 };
708 /* *INDENT-ON* */
709
710 #ifdef KEY_RESIZE
711 int old_height = height;
712 int old_width = width;
713 #endif
714 BOX dy_box, mn_box, yr_box;
715 int fkey;
716 int key;
717 int step;
718 int button;
719 int result = DLG_EXIT_UNKNOWN;
720 int week_start;
721 WINDOW *dialog;
722 time_t now_time;
723 struct tm current;
724 int state = dlg_default_button();
725 const char **buttons = dlg_ok_labels();
726 char *prompt;
727 int mincols = MIN_WIDE;
728 char buffer[MAX_LEN];
729 DIALOG_VARS save_vars;
730
731 DLG_TRACE(("# calendar args:\n"));
732 DLG_TRACE2S("title", title);
733 DLG_TRACE2S("message", subtitle);
734 DLG_TRACE2N("height", height);
735 DLG_TRACE2N("width", width);
736 DLG_TRACE2N("day", day);
737 DLG_TRACE2N("month", month);
738 DLG_TRACE2N("year", year);
739
740 dlg_save_vars(&save_vars);
741 dialog_vars.separate_output = TRUE;
742
743 dlg_does_output();
744
745 /*
746 * Unless overridden, the current time/date is our starting point.
747 */
748 now_time = time((time_t *) 0);
749 current = *localtime(&now_time);
750
751 #if HAVE_MKTIME
752 current.tm_isdst = -1;
753 if (year >= 1900) {
754 current.tm_year = year - 1900;
755 }
756 if (month >= 1) {
757 current.tm_mon = month - 1;
758 }
759 if (day > 0 && day <= days_per_month(current.tm_year + 1900,
760 current.tm_mon + 1)) {
761 current.tm_mday = day;
762 }
763 now_time = mktime(¤t);
764 #else
765 if (day < 0)
766 day = current.tm_mday;
767 if (month < 0)
768 month = current.tm_mon + 1;
769 if (year < 0)
770 year = current.tm_year + 1900;
771
772 /* compute a struct tm that matches the day/month/year parameters */
773 if (((year -= 1900) > 0) && (year < 200)) {
774 /* ugly, but I'd like to run this on older machines w/o mktime -TD */
775 for (;;) {
776 if (year > current.tm_year) {
777 now_time += ONE_DAY * days_in_year(¤t, 0);
778 } else if (year < current.tm_year) {
779 now_time -= ONE_DAY * days_in_year(¤t, -1);
780 } else if (month > current.tm_mon + 1) {
781 now_time += ONE_DAY * days_in_month(¤t, 0);
782 } else if (month < current.tm_mon + 1) {
783 now_time -= ONE_DAY * days_in_month(¤t, -1);
784 } else if (day > current.tm_mday) {
785 now_time += ONE_DAY;
786 } else if (day < current.tm_mday) {
787 now_time -= ONE_DAY;
788 } else {
789 break;
790 }
791 current = *localtime(&now_time);
792 }
793 }
794 #endif
795
796 dlg_button_layout(buttons, &mincols);
797
798 #ifdef KEY_RESIZE
799 retry:
800 #endif
801
802 prompt = dlg_strclone(subtitle);
803 dlg_auto_size(title, prompt, &height, &width, 0, mincols);
804
805 height += MIN_HIGH - 1;
806 dlg_print_size(height, width);
807 dlg_ctl_size(height, width);
808
809 dialog = dlg_new_window(height, width,
810 dlg_box_y_ordinate(height),
811 dlg_box_x_ordinate(width));
812 dlg_register_window(dialog, "calendar", binding);
813 dlg_register_buttons(dialog, "calendar", buttons);
814
815 /* mainbox */
816 dlg_draw_box2(dialog, 0, 0, height, width, dialog_attr, border_attr, border2_attr);
817 dlg_draw_bottom_box2(dialog, border_attr, border2_attr, dialog_attr);
818 dlg_draw_title(dialog, title);
819
820 dlg_attrset(dialog, dialog_attr); /* text mainbox */
821 dlg_print_autowrap(dialog, prompt, height, width);
822
823 /* compute positions of day, month and year boxes */
824 memset(&dy_box, 0, sizeof(dy_box));
825 memset(&mn_box, 0, sizeof(mn_box));
826 memset(&yr_box, 0, sizeof(yr_box));
827
828 if ((week_start = WeekStart()) < 0 ||
829 init_object(&dy_box,
830 dialog,
831 (width - DAY_WIDE) / 2,
832 1 + (height - (DAY_HIGH + BTN_HIGH + (5 * MARGIN))),
833 DAY_WIDE,
834 DAY_HIGH + 1,
835 draw_day,
836 week_start,
837 'D') < 0 ||
838 ((dy_box.week_start = WeekStart()) < 0) ||
839 DrawObject(&dy_box) < 0) {
840 return CleanupResult(DLG_EXIT_ERROR, dialog, prompt, &save_vars);
841 }
842
843 if (init_object(&mn_box,
844 dialog,
845 dy_box.x,
846 dy_box.y - (HDR_HIGH + 2 * MARGIN),
847 (DAY_WIDE / 2) - MARGIN,
848 HDR_HIGH,
849 draw_month,
850 0,
851 'M') < 0
852 || DrawObject(&mn_box) < 0) {
853 return CleanupResult(DLG_EXIT_ERROR, dialog, prompt, &save_vars);
854 }
855
856 if (init_object(&yr_box,
857 dialog,
858 dy_box.x + mn_box.width + 2,
859 mn_box.y,
860 mn_box.width,
861 mn_box.height,
862 draw_year,
863 0,
864 'Y') < 0
865 || DrawObject(&yr_box) < 0) {
866 return CleanupResult(DLG_EXIT_ERROR, dialog, prompt, &save_vars);
867 }
868
869 dlg_trace_win(dialog);
870 while (result == DLG_EXIT_UNKNOWN) {
871 int key2;
872 BOX *obj = (state == sDAY ? &dy_box
873 : (state == sMONTH ? &mn_box :
874 (state == sYEAR ? &yr_box : 0)));
875
876 button = (state < 0) ? 0 : state;
877 dlg_draw_buttons(dialog, height - 2, 0, buttons, button, FALSE, width);
878 if (obj != 0)
879 dlg_set_focus(dialog, obj->window);
880
881 key = dlg_mouse_wgetch(dialog, &fkey);
882 if (dlg_result_key(key, fkey, &result)) {
883 if (!dlg_button_key(result, &button, &key, &fkey))
884 break;
885 }
886 #define Mouse2Key(key) (key - M_EVENT)
887 if (fkey && (key >= DLGK_MOUSE(KEY_MIN) && key <= DLGK_MOUSE(KEY_MAX))) {
888 key = dlg_lookup_key(dialog, Mouse2Key(key), &fkey);
889 }
890
891 if ((key2 = dlg_char_to_button(key, buttons)) >= 0) {
892 result = key2;
893 } else if (fkey) {
894 /* handle function-keys */
895 switch (key) {
896 case DLGK_MOUSE('D'):
897 state = sDAY;
898 break;
899 case DLGK_MOUSE('M'):
900 state = sMONTH;
901 break;
902 case DLGK_MOUSE('Y'):
903 state = sYEAR;
904 break;
905 case DLGK_TOGGLE:
906 case DLGK_ENTER:
907 result = dlg_enter_buttoncode(button);
908 break;
909 case DLGK_LEAVE:
910 result = dlg_ok_buttoncode(button);
911 break;
912 case DLGK_FIELD_PREV:
913 state = dlg_prev_ok_buttonindex(state, sMONTH);
914 break;
915 case DLGK_FIELD_NEXT:
916 state = dlg_next_ok_buttonindex(state, sMONTH);
917 break;
918 #ifdef KEY_RESIZE
919 case KEY_RESIZE:
920 dlg_will_resize(dialog);
921 /* reset data */
922 height = old_height;
923 width = old_width;
924 free(prompt);
925 _dlg_resize_cleanup(dialog);
926 /* repaint */
927 goto retry;
928 #endif
929 default:
930 step = 0;
931 key2 = -1;
932 if (is_DLGK_MOUSE(key)) {
933 if ((key2 = dlg_ok_buttoncode(Mouse2Key(key))) >= 0) {
934 result = key2;
935 break;
936 } else if (key >= DLGK_MOUSE(KEY_MAX)) {
937 state = sDAY;
938 obj = &dy_box;
939 key2 = 1;
940 step = (key
941 - DLGK_MOUSE(KEY_MAX)
942 - day_cell_number(¤t));
943 DLG_TRACE(("# mouseclick decoded %d\n", step));
944 }
945 }
946 if (obj != 0) {
947 if (key2 < 0) {
948 step = next_or_previous(key, (obj == &dy_box));
949 }
950 if (step != 0) {
951 struct tm old = current;
952
953 /* see comment regarding mktime -TD */
954 if (obj == &dy_box) {
955 now_time += ONE_DAY * step;
956 } else if (obj == &mn_box) {
957 if (step > 0)
958 now_time += ONE_DAY *
959 days_in_month(¤t, 0);
960 else
961 now_time -= ONE_DAY *
962 days_in_month(¤t, -1);
963 } else if (obj == &yr_box) {
964 if (step > 0)
965 now_time += (ONE_DAY
966 * days_in_year(¤t, 0));
967 else
968 now_time -= (ONE_DAY
969 * days_in_year(¤t, -1));
970 }
971
972 current = *localtime(&now_time);
973
974 trace_date(¤t, &old);
975 if (obj != &dy_box
976 && (current.tm_mday != old.tm_mday
977 || current.tm_mon != old.tm_mon
978 || current.tm_year != old.tm_year))
979 DrawObject(&dy_box);
980 if (obj != &mn_box && current.tm_mon != old.tm_mon)
981 DrawObject(&mn_box);
982 if (obj != &yr_box && current.tm_year != old.tm_year)
983 DrawObject(&yr_box);
984 (void) DrawObject(obj);
985 }
986 } else if (state >= 0) {
987 if (next_or_previous(key, FALSE) < 0)
988 state = dlg_prev_ok_buttonindex(state, sMONTH);
989 else if (next_or_previous(key, FALSE) > 0)
990 state = dlg_next_ok_buttonindex(state, sMONTH);
991 }
992 break;
993 }
994 }
995 }
996
997 #define DefaultFormat(dst, src) \
998 sprintf(dst, "%02d/%02d/%0d", \
999 src.tm_mday, src.tm_mon + 1, src.tm_year + 1900)
1000 #ifdef HAVE_STRFTIME
1001 if (dialog_vars.date_format != 0) {
1002 size_t used = strftime(buffer,
1003 sizeof(buffer) - 1,
1004 dialog_vars.date_format,
1005 ¤t);
1006 if (used == 0 || *buffer == '\0')
1007 DefaultFormat(buffer, current);
1008 } else
1009 #endif
1010 DefaultFormat(buffer, current);
1011
1012 dlg_add_result(buffer);
1013 AddLastKey();
1014
1015 return CleanupResult(result, dialog, prompt, &save_vars);
1016 }
1017