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3afbc435 | 1 | ;;; cal-islam.el --- calendar functions for the Islamic calendar |
0808d911 | 2 | |
f0fa15c5 | 3 | ;; Copyright (C) 1995, 1997, 2001, 2002, 2003, 2004, 2005, 2006, 2007 |
dbfca9c4 | 4 | ;; Free Software Foundation, Inc. |
0808d911 ER |
5 | |
6 | ;; Author: Edward M. Reingold <reingold@cs.uiuc.edu> | |
dbfca9c4 | 7 | ;; Maintainer: Glenn Morris <rgm@gnu.org> |
0808d911 ER |
8 | ;; Keywords: calendar |
9 | ;; Human-Keywords: Islamic calendar, calendar, diary | |
10 | ||
11 | ;; This file is part of GNU Emacs. | |
12 | ||
13 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
14 | ;; it under the terms of the GNU General Public License as published by | |
15 | ;; the Free Software Foundation; either version 2, or (at your option) | |
16 | ;; any later version. | |
17 | ||
18 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
19 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | ;; GNU General Public License for more details. | |
22 | ||
23 | ;; You should have received a copy of the GNU General Public License | |
b578f267 | 24 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
3a35cf56 LK |
25 | ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
26 | ;; Boston, MA 02110-1301, USA. | |
0808d911 ER |
27 | |
28 | ;;; Commentary: | |
29 | ||
30 | ;; This collection of functions implements the features of calendar.el and | |
31 | ;; diary.el that deal with the Islamic calendar. | |
32 | ||
a96a5fca | 33 | ;; Technical details of all the calendrical calculations can be found in |
fffaba77 PE |
34 | ;; ``Calendrical Calculations: The Millennium Edition'' by Edward M. Reingold |
35 | ;; and Nachum Dershowitz, Cambridge University Press (2001). | |
a96a5fca | 36 | |
0808d911 ER |
37 | ;;; Code: |
38 | ||
64b9cc40 | 39 | (defvar date) |
48ad4975 GM |
40 | (defvar displayed-month) |
41 | (defvar displayed-year) | |
64b9cc40 JB |
42 | (defvar number) |
43 | (defvar original-date) | |
48ad4975 | 44 | |
0808d911 ER |
45 | (require 'cal-julian) |
46 | ||
47 | (defvar calendar-islamic-month-name-array | |
48 | ["Muharram" "Safar" "Rabi I" "Rabi II" "Jumada I" "Jumada II" | |
48ad4975 GM |
49 | "Rajab" "Sha'ban" "Ramadan" "Shawwal" "Dhu al-Qada" "Dhu al-Hijjah"] |
50 | "Array of strings giving the names of the Islamic months.") | |
0808d911 ER |
51 | |
52 | (defvar calendar-islamic-epoch (calendar-absolute-from-julian '(7 16 622)) | |
53 | "Absolute date of start of Islamic calendar = August 29, 284 A.D. (Julian).") | |
54 | ||
55 | (defun islamic-calendar-leap-year-p (year) | |
56 | "Returns t if YEAR is a leap year on the Islamic calendar." | |
57 | (memq (% year 30) | |
58 | (list 2 5 7 10 13 16 18 21 24 26 29))) | |
59 | ||
60 | (defun islamic-calendar-last-day-of-month (month year) | |
61 | "The last day in MONTH during YEAR on the Islamic calendar." | |
62 | (cond | |
63 | ((memq month (list 1 3 5 7 9 11)) 30) | |
64 | ((memq month (list 2 4 6 8 10)) 29) | |
65 | (t (if (islamic-calendar-leap-year-p year) 30 29)))) | |
66 | ||
67 | (defun islamic-calendar-day-number (date) | |
68 | "Return the day number within the year of the Islamic date DATE." | |
69 | (let* ((month (extract-calendar-month date)) | |
70 | (day (extract-calendar-day date))) | |
71 | (+ (* 30 (/ month 2)) | |
72 | (* 29 (/ (1- month) 2)) | |
73 | day))) | |
74 | ||
75 | (defun calendar-absolute-from-islamic (date) | |
76 | "Absolute date of Islamic DATE. | |
77 | The absolute date is the number of days elapsed since the (imaginary) | |
78 | Gregorian date Sunday, December 31, 1 BC." | |
79 | (let* ((month (extract-calendar-month date)) | |
80 | (day (extract-calendar-day date)) | |
81 | (year (extract-calendar-year date)) | |
82 | (y (% year 30)) | |
83 | (leap-years-in-cycle | |
84 | (cond | |
85 | ((< y 3) 0) ((< y 6) 1) ((< y 8) 2) ((< y 11) 3) ((< y 14) 4) | |
86 | ((< y 17) 5) ((< y 19) 6) ((< y 22) 7) ((< y 25) 8) ((< y 27) 9) | |
87 | (t 10)))) | |
88 | (+ (islamic-calendar-day-number date);; days so far this year | |
89 | (* (1- year) 354) ;; days in all non-leap years | |
90 | (* 11 (/ year 30)) ;; leap days in complete cycles | |
91 | leap-years-in-cycle ;; leap days this cycle | |
92 | (1- calendar-islamic-epoch)))) ;; days before start of calendar | |
93 | ||
94 | (defun calendar-islamic-from-absolute (date) | |
95 | "Compute the Islamic date (month day year) corresponding to absolute DATE. | |
96 | The absolute date is the number of days elapsed since the (imaginary) | |
97 | Gregorian date Sunday, December 31, 1 BC." | |
98 | (if (< date calendar-islamic-epoch) | |
99 | (list 0 0 0);; pre-Islamic date | |
100 | (let* ((approx (/ (- date calendar-islamic-epoch) | |
101 | 355));; Approximation from below. | |
102 | (year ;; Search forward from the approximation. | |
103 | (+ approx | |
104 | (calendar-sum y approx | |
105 | (>= date (calendar-absolute-from-islamic | |
106 | (list 1 1 (1+ y)))) | |
107 | 1))) | |
108 | (month ;; Search forward from Muharram. | |
109 | (1+ (calendar-sum m 1 | |
110 | (> date | |
111 | (calendar-absolute-from-islamic | |
112 | (list m | |
113 | (islamic-calendar-last-day-of-month | |
114 | m year) | |
115 | year))) | |
116 | 1))) | |
117 | (day ;; Calculate the day by subtraction. | |
118 | (- date | |
119 | (1- (calendar-absolute-from-islamic (list month 1 year)))))) | |
120 | (list month day year)))) | |
121 | ||
122 | (defun calendar-islamic-date-string (&optional date) | |
123 | "String of Islamic date before sunset of Gregorian DATE. | |
124 | Returns the empty string if DATE is pre-Islamic. | |
125 | Defaults to today's date if DATE is not given. | |
126 | Driven by the variable `calendar-date-display-form'." | |
127 | (let ((calendar-month-name-array calendar-islamic-month-name-array) | |
128 | (islamic-date (calendar-islamic-from-absolute | |
129 | (calendar-absolute-from-gregorian | |
130 | (or date (calendar-current-date)))))) | |
131 | (if (< (extract-calendar-year islamic-date) 1) | |
132 | "" | |
133 | (calendar-date-string islamic-date nil t)))) | |
134 | ||
135 | (defun calendar-print-islamic-date () | |
136 | "Show the Islamic calendar equivalent of the date under the cursor." | |
137 | (interactive) | |
138 | (let ((i (calendar-islamic-date-string (calendar-cursor-to-date t)))) | |
139 | (if (string-equal i "") | |
140 | (message "Date is pre-Islamic") | |
141 | (message "Islamic date (until sunset): %s" i)))) | |
142 | ||
143 | (defun calendar-goto-islamic-date (date &optional noecho) | |
144 | "Move cursor to Islamic DATE; echo Islamic date unless NOECHO is t." | |
145 | (interactive | |
146 | (let* ((today (calendar-current-date)) | |
147 | (year (calendar-read | |
148 | "Islamic calendar year (>0): " | |
149 | '(lambda (x) (> x 0)) | |
150 | (int-to-string | |
151 | (extract-calendar-year | |
152 | (calendar-islamic-from-absolute | |
153 | (calendar-absolute-from-gregorian today)))))) | |
154 | (month-array calendar-islamic-month-name-array) | |
155 | (completion-ignore-case t) | |
53d0b6a2 | 156 | (month (cdr (assoc-string |
0808d911 ER |
157 | (completing-read |
158 | "Islamic calendar month name: " | |
159 | (mapcar 'list (append month-array nil)) | |
77cb2f4c | 160 | nil t) |
53d0b6a2 | 161 | (calendar-make-alist month-array 1) t))) |
0808d911 ER |
162 | (last (islamic-calendar-last-day-of-month month year)) |
163 | (day (calendar-read | |
164 | (format "Islamic calendar day (1-%d): " last) | |
165 | '(lambda (x) (and (< 0 x) (<= x last)))))) | |
166 | (list (list month day year)))) | |
167 | (calendar-goto-date (calendar-gregorian-from-absolute | |
168 | (calendar-absolute-from-islamic date))) | |
169 | (or noecho (calendar-print-islamic-date))) | |
170 | ||
171 | (defun diary-islamic-date () | |
172 | "Islamic calendar equivalent of date diary entry." | |
5cb93910 | 173 | (let ((i (calendar-islamic-date-string date))) |
0808d911 ER |
174 | (if (string-equal i "") |
175 | "Date is pre-Islamic" | |
176 | (format "Islamic date (until sunset): %s" i)))) | |
177 | ||
178 | (defun holiday-islamic (month day string) | |
179 | "Holiday on MONTH, DAY (Islamic) called STRING. | |
180 | If MONTH, DAY (Islamic) is visible, the value returned is corresponding | |
181 | Gregorian date in the form of the list (((month day year) STRING)). Returns | |
182 | nil if it is not visible in the current calendar window." | |
183 | (let* ((islamic-date (calendar-islamic-from-absolute | |
184 | (calendar-absolute-from-gregorian | |
185 | (list displayed-month 15 displayed-year)))) | |
186 | (m (extract-calendar-month islamic-date)) | |
187 | (y (extract-calendar-year islamic-date)) | |
188 | (date)) | |
189 | (if (< m 1) | |
190 | nil;; Islamic calendar doesn't apply. | |
191 | (increment-calendar-month m y (- 10 month)) | |
192 | (if (> m 7);; Islamic date might be visible | |
193 | (let ((date (calendar-gregorian-from-absolute | |
194 | (calendar-absolute-from-islamic (list month day y))))) | |
195 | (if (calendar-date-is-visible-p date) | |
196 | (list (list date string)))))))) | |
197 | ||
198 | (defun list-islamic-diary-entries () | |
199 | "Add any Islamic date entries from the diary file to `diary-entries-list'. | |
200 | Islamic date diary entries must be prefaced by an `islamic-diary-entry-symbol' | |
201 | \(normally an `I'). The same diary date forms govern the style of the Islamic | |
202 | calendar entries, except that the Islamic month names must be spelled in full. | |
203 | The Islamic months are numbered from 1 to 12 with Muharram being 1 and 12 being | |
204 | Dhu al-Hijjah. If an Islamic date diary entry begins with a | |
205 | `diary-nonmarking-symbol', the entry will appear in the diary listing, but will | |
206 | not be marked in the calendar. This function is provided for use with the | |
207 | `nongregorian-diary-listing-hook'." | |
208 | (if (< 0 number) | |
209 | (let ((buffer-read-only nil) | |
210 | (diary-modified (buffer-modified-p)) | |
211 | (gdate original-date) | |
212 | (mark (regexp-quote diary-nonmarking-symbol))) | |
92b1f7ab GM |
213 | (dotimes (idummy number) |
214 | (let* ((d diary-date-forms) | |
215 | (idate (calendar-islamic-from-absolute | |
216 | (calendar-absolute-from-gregorian gdate))) | |
217 | (month (extract-calendar-month idate)) | |
218 | (day (extract-calendar-day idate)) | |
219 | (year (extract-calendar-year idate))) | |
220 | (while d | |
221 | (let* | |
222 | ((date-form (if (equal (car (car d)) 'backup) | |
223 | (cdr (car d)) | |
224 | (car d))) | |
225 | (backup (equal (car (car d)) 'backup)) | |
226 | (dayname | |
227 | (format "%s\\|%s\\.?" | |
228 | (calendar-day-name gdate) | |
229 | (calendar-day-name gdate 'abbrev))) | |
230 | (calendar-month-name-array | |
231 | calendar-islamic-month-name-array) | |
232 | (monthname | |
233 | (concat | |
234 | "\\*\\|" | |
235 | (calendar-month-name month))) | |
236 | (month (concat "\\*\\|0*" (int-to-string month))) | |
237 | (day (concat "\\*\\|0*" (int-to-string day))) | |
238 | (year | |
239 | (concat | |
240 | "\\*\\|0*" (int-to-string year) | |
241 | (if abbreviated-calendar-year | |
242 | (concat "\\|" (int-to-string (% year 100))) | |
243 | ""))) | |
244 | (regexp | |
245 | (concat | |
246 | "\\(\\`\\|\^M\\|\n\\)" mark "?" | |
247 | (regexp-quote islamic-diary-entry-symbol) | |
248 | "\\(" | |
249 | (mapconcat 'eval date-form "\\)\\(") | |
250 | "\\)")) | |
251 | (case-fold-search t)) | |
252 | (goto-char (point-min)) | |
253 | (while (re-search-forward regexp nil t) | |
254 | (if backup (re-search-backward "\\<" nil t)) | |
255 | (if (and (or (char-equal (preceding-char) ?\^M) | |
256 | (char-equal (preceding-char) ?\n)) | |
257 | (not (looking-at " \\|\^I"))) | |
258 | ;; Diary entry that consists only of date. | |
259 | (backward-char 1) | |
260 | ;; Found a nonempty diary entry--make it visible and | |
261 | ;; add it to the list. | |
262 | (let ((entry-start (point)) | |
263 | (date-start)) | |
264 | (re-search-backward "\^M\\|\n\\|\\`") | |
265 | (setq date-start (point)) | |
266 | (re-search-forward "\^M\\|\n" nil t 2) | |
267 | (while (looking-at " \\|\^I") | |
268 | (re-search-forward "\^M\\|\n" nil t)) | |
269 | (backward-char 1) | |
270 | (subst-char-in-region date-start (point) ?\^M ?\n t) | |
271 | (add-to-diary-list | |
272 | gdate | |
273 | (buffer-substring-no-properties entry-start (point)) | |
274 | (buffer-substring-no-properties | |
275 | (1+ date-start) (1- entry-start)) | |
276 | (copy-marker entry-start)))))) | |
277 | (setq d (cdr d)))) | |
278 | (setq gdate | |
279 | (calendar-gregorian-from-absolute | |
280 | (1+ (calendar-absolute-from-gregorian gdate))))) | |
281 | (set-buffer-modified-p diary-modified)) | |
282 | (goto-char (point-min)))) | |
0808d911 ER |
283 | |
284 | (defun mark-islamic-diary-entries () | |
285 | "Mark days in the calendar window that have Islamic date diary entries. | |
286 | Each entry in diary-file (or included files) visible in the calendar window | |
287 | is marked. Islamic date entries are prefaced by a islamic-diary-entry-symbol | |
288 | \(normally an `I'). The same diary-date-forms govern the style of the Islamic | |
289 | calendar entries, except that the Islamic month names must be spelled in full. | |
290 | The Islamic months are numbered from 1 to 12 with Muharram being 1 and 12 being | |
291 | Dhu al-Hijjah. Islamic date diary entries that begin with a | |
292 | diary-nonmarking-symbol will not be marked in the calendar. This function is | |
293 | provided for use as part of the nongregorian-diary-marking-hook." | |
294 | (let ((d diary-date-forms)) | |
295 | (while d | |
296 | (let* | |
297 | ((date-form (if (equal (car (car d)) 'backup) | |
298 | (cdr (car d)) | |
299 | (car d)));; ignore 'backup directive | |
48ad4975 GM |
300 | (dayname (diary-name-pattern calendar-day-name-array |
301 | calendar-day-abbrev-array)) | |
0808d911 | 302 | (monthname |
48ad4975 GM |
303 | (format "%s\\|\\*" |
304 | (diary-name-pattern calendar-islamic-month-name-array))) | |
0808d911 ER |
305 | (month "[0-9]+\\|\\*") |
306 | (day "[0-9]+\\|\\*") | |
307 | (year "[0-9]+\\|\\*") | |
308 | (l (length date-form)) | |
309 | (d-name-pos (- l (length (memq 'dayname date-form)))) | |
310 | (d-name-pos (if (/= l d-name-pos) (+ 2 d-name-pos))) | |
311 | (m-name-pos (- l (length (memq 'monthname date-form)))) | |
312 | (m-name-pos (if (/= l m-name-pos) (+ 2 m-name-pos))) | |
313 | (d-pos (- l (length (memq 'day date-form)))) | |
314 | (d-pos (if (/= l d-pos) (+ 2 d-pos))) | |
315 | (m-pos (- l (length (memq 'month date-form)))) | |
316 | (m-pos (if (/= l m-pos) (+ 2 m-pos))) | |
317 | (y-pos (- l (length (memq 'year date-form)))) | |
318 | (y-pos (if (/= l y-pos) (+ 2 y-pos))) | |
319 | (regexp | |
320 | (concat | |
321 | "\\(\\`\\|\^M\\|\n\\)" | |
322 | (regexp-quote islamic-diary-entry-symbol) | |
323 | "\\(" | |
324 | (mapconcat 'eval date-form "\\)\\(") | |
325 | "\\)")) | |
326 | (case-fold-search t)) | |
327 | (goto-char (point-min)) | |
328 | (while (re-search-forward regexp nil t) | |
329 | (let* ((dd-name | |
330 | (if d-name-pos | |
331 | (buffer-substring | |
332 | (match-beginning d-name-pos) | |
333 | (match-end d-name-pos)))) | |
334 | (mm-name | |
335 | (if m-name-pos | |
336 | (buffer-substring | |
337 | (match-beginning m-name-pos) | |
338 | (match-end m-name-pos)))) | |
027a4b6b | 339 | (mm (string-to-number |
0808d911 ER |
340 | (if m-pos |
341 | (buffer-substring | |
342 | (match-beginning m-pos) | |
343 | (match-end m-pos)) | |
344 | ""))) | |
027a4b6b | 345 | (dd (string-to-number |
0808d911 ER |
346 | (if d-pos |
347 | (buffer-substring | |
348 | (match-beginning d-pos) | |
349 | (match-end d-pos)) | |
350 | ""))) | |
351 | (y-str (if y-pos | |
352 | (buffer-substring | |
353 | (match-beginning y-pos) | |
354 | (match-end y-pos)))) | |
355 | (yy (if (not y-str) | |
356 | 0 | |
357 | (if (and (= (length y-str) 2) | |
358 | abbreviated-calendar-year) | |
359 | (let* ((current-y | |
360 | (extract-calendar-year | |
361 | (calendar-islamic-from-absolute | |
362 | (calendar-absolute-from-gregorian | |
363 | (calendar-current-date))))) | |
027a4b6b | 364 | (y (+ (string-to-number y-str) |
0808d911 ER |
365 | (* 100 (/ current-y 100))))) |
366 | (if (> (- y current-y) 50) | |
367 | (- y 100) | |
368 | (if (> (- current-y y) 50) | |
369 | (+ y 100) | |
370 | y))) | |
027a4b6b | 371 | (string-to-number y-str))))) |
0808d911 ER |
372 | (if dd-name |
373 | (mark-calendar-days-named | |
53d0b6a2 | 374 | (cdr (assoc-string dd-name |
77cb2f4c RS |
375 | (calendar-make-alist |
376 | calendar-day-name-array | |
53d0b6a2 | 377 | 0 nil calendar-day-abbrev-array) t))) |
0808d911 | 378 | (if mm-name |
48ad4975 | 379 | (setq mm (if (string-equal mm-name "*") 0 |
53d0b6a2 | 380 | (cdr (assoc-string |
48ad4975 GM |
381 | mm-name |
382 | (calendar-make-alist | |
53d0b6a2 | 383 | calendar-islamic-month-name-array) t))))) |
0808d911 ER |
384 | (mark-islamic-calendar-date-pattern mm dd yy))))) |
385 | (setq d (cdr d))))) | |
386 | ||
387 | (defun mark-islamic-calendar-date-pattern (month day year) | |
388 | "Mark dates in calendar window that conform to Islamic date MONTH/DAY/YEAR. | |
389 | A value of 0 in any position is a wildcard." | |
390 | (save-excursion | |
391 | (set-buffer calendar-buffer) | |
392 | (if (and (/= 0 month) (/= 0 day)) | |
393 | (if (/= 0 year) | |
394 | ;; Fully specified Islamic date. | |
395 | (let ((date (calendar-gregorian-from-absolute | |
396 | (calendar-absolute-from-islamic | |
397 | (list month day year))))) | |
398 | (if (calendar-date-is-visible-p date) | |
399 | (mark-visible-calendar-date date))) | |
400 | ;; Month and day in any year--this taken from the holiday stuff. | |
401 | (let* ((islamic-date (calendar-islamic-from-absolute | |
402 | (calendar-absolute-from-gregorian | |
403 | (list displayed-month 15 displayed-year)))) | |
404 | (m (extract-calendar-month islamic-date)) | |
405 | (y (extract-calendar-year islamic-date)) | |
406 | (date)) | |
407 | (if (< m 1) | |
408 | nil;; Islamic calendar doesn't apply. | |
409 | (increment-calendar-month m y (- 10 month)) | |
410 | (if (> m 7);; Islamic date might be visible | |
411 | (let ((date (calendar-gregorian-from-absolute | |
412 | (calendar-absolute-from-islamic | |
413 | (list month day y))))) | |
414 | (if (calendar-date-is-visible-p date) | |
415 | (mark-visible-calendar-date date))))))) | |
416 | ;; Not one of the simple cases--check all visible dates for match. | |
417 | ;; Actually, the following code takes care of ALL of the cases, but | |
418 | ;; it's much too slow to be used for the simple (common) cases. | |
419 | (let ((m displayed-month) | |
420 | (y displayed-year) | |
421 | (first-date) | |
422 | (last-date)) | |
423 | (increment-calendar-month m y -1) | |
424 | (setq first-date | |
425 | (calendar-absolute-from-gregorian | |
426 | (list m 1 y))) | |
427 | (increment-calendar-month m y 2) | |
428 | (setq last-date | |
429 | (calendar-absolute-from-gregorian | |
430 | (list m (calendar-last-day-of-month m y) y))) | |
431 | (calendar-for-loop date from first-date to last-date do | |
432 | (let* ((i-date (calendar-islamic-from-absolute date)) | |
433 | (i-month (extract-calendar-month i-date)) | |
434 | (i-day (extract-calendar-day i-date)) | |
435 | (i-year (extract-calendar-year i-date))) | |
436 | (and (or (zerop month) | |
437 | (= month i-month)) | |
438 | (or (zerop day) | |
439 | (= day i-day)) | |
440 | (or (zerop year) | |
441 | (= year i-year)) | |
442 | (mark-visible-calendar-date | |
443 | (calendar-gregorian-from-absolute date))))))))) | |
444 | ||
445 | (defun insert-islamic-diary-entry (arg) | |
446 | "Insert a diary entry. | |
447 | For the Islamic date corresponding to the date indicated by point. | |
448 | Prefix arg will make the entry nonmarking." | |
449 | (interactive "P") | |
450 | (let* ((calendar-month-name-array calendar-islamic-month-name-array)) | |
451 | (make-diary-entry | |
452 | (concat | |
453 | islamic-diary-entry-symbol | |
a1506d29 | 454 | (calendar-date-string |
0808d911 ER |
455 | (calendar-islamic-from-absolute |
456 | (calendar-absolute-from-gregorian | |
457 | (calendar-cursor-to-date t))) | |
458 | nil t)) | |
459 | arg))) | |
460 | ||
461 | (defun insert-monthly-islamic-diary-entry (arg) | |
462 | "Insert a monthly diary entry. | |
463 | For the day of the Islamic month corresponding to the date indicated by point. | |
464 | Prefix arg will make the entry nonmarking." | |
465 | (interactive "P") | |
466 | (let* ((calendar-date-display-form | |
467 | (if european-calendar-style '(day " * ") '("* " day ))) | |
468 | (calendar-month-name-array calendar-islamic-month-name-array)) | |
469 | (make-diary-entry | |
470 | (concat | |
471 | islamic-diary-entry-symbol | |
a1506d29 | 472 | (calendar-date-string |
0808d911 ER |
473 | (calendar-islamic-from-absolute |
474 | (calendar-absolute-from-gregorian | |
475 | (calendar-cursor-to-date t))))) | |
476 | arg))) | |
477 | ||
478 | (defun insert-yearly-islamic-diary-entry (arg) | |
479 | "Insert an annual diary entry. | |
480 | For the day of the Islamic year corresponding to the date indicated by point. | |
481 | Prefix arg will make the entry nonmarking." | |
482 | (interactive "P") | |
483 | (let* ((calendar-date-display-form | |
484 | (if european-calendar-style | |
485 | '(day " " monthname) | |
486 | '(monthname " " day))) | |
487 | (calendar-month-name-array calendar-islamic-month-name-array)) | |
488 | (make-diary-entry | |
489 | (concat | |
490 | islamic-diary-entry-symbol | |
a1506d29 | 491 | (calendar-date-string |
0808d911 ER |
492 | (calendar-islamic-from-absolute |
493 | (calendar-absolute-from-gregorian | |
494 | (calendar-cursor-to-date t))))) | |
495 | arg))) | |
496 | ||
afdbe61d | 497 | (provide 'cal-islam) |
0808d911 | 498 | |
ab5796a9 | 499 | ;;; arch-tag: a951b6c1-6f47-48d5-bac3-1b505cd719f7 |
afdbe61d | 500 | ;;; cal-islam.el ends here |