From: Edward M. Reingold Date: Thu, 21 Sep 1995 03:11:06 +0000 (+0000) Subject: Initial revision X-Git-Tag: emacs-19.34~2807 X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=0808d911849c492c711d246e68c7afa7525526ea;p=emacs.git Initial revision --- diff --git a/lisp/calendar/cal-china.el b/lisp/calendar/cal-china.el new file mode 100644 index 00000000000..1f4c4027f93 --- /dev/null +++ b/lisp/calendar/cal-china.el @@ -0,0 +1,322 @@ +;;; cal-chinese.el --- calendar functions for the Chinese calendar. + +;; Copyright (C) 1995 Free Software Foundation, Inc. + +;; Author: Edward M. Reingold +;; Keywords: calendar +;; Human-Keywords: Chinese calendar, calendar, holidays, diary + +;; This file is part of GNU Emacs. + +;; GNU Emacs is free software; you can redistribute it and/or modify +;; it under the terms of the GNU General Public License as published by +;; the Free Software Foundation; either version 2, or (at your option) +;; any later version. + +;; GNU Emacs is distributed in the hope that it will be useful, +;; but WITHOUT ANY WARRANTY; without even the implied warranty of +;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;; GNU General Public License for more details. + +;; You should have received a copy of the GNU General Public License +;; along with GNU Emacs; see the file COPYING. If not, write to +;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + +;;; Commentary: + +;; This collection of functions implements the features of calendar.el, +;; diary.el, and holidays.el that deal with the Chinese calendar. It was +;; written by + +;; Edward M. Reingold Department of Computer Science +;; (217) 333-6733 University of Illinois at Urbana-Champaign +;; reingold@cs.uiuc.edu 1304 West Springfield Avenue +;; Urbana, Illinois 61801 + +;;; Code: + +(require 'lunar) + +(defvar chinese-calendar-terrestrial-branch + ["Zi" "Chou" "Yin" "Mao" "Chen" "Si" "Wu" "Wei" "Shen" "You" "Xu" "Hai"]) + +(defvar chinese-calendar-celestial-stem + ["Jia" "Yi" "Bing" "Ding" "Wu" "Ji" "Geng" "Xin" "Ren" "Gui"]) + +(defvar chinese-calendar-time-zone + '(if (< year 1928) + (+ 465 (/ 40.0 60.0)) + 480) + "*Number of minutes difference between local standard time for Chinese +calendar and Coordinated Universal (Greenwich) Time. Default is for Beijing. +This is an expression in `year' since it changed at 1928-01-01 00:00:00 from +UT+7:45:40 to UT+8.") + +(defvar chinese-calendar-location-name "Beijing" + "*Name of location used for calculation of Chinese calendar.") + +(defvar chinese-calendar-daylight-time-offset 0 +; The correct value is as follows, but I don't believe the Chinese calendrical +; authorities would use DST in determining astronomical events: +; 60 + "*Number of minutes difference between daylight savings and standard time +for Chinese calendar. Default is for no daylight savings time.") + +(defvar chinese-calendar-standard-time-zone-name + '(if (< year 1928) + "PMT" + "CST") + "*Abbreviated name of standard time zone used for Chinese calendar.") + +(defvar chinese-calendar-daylight-time-zone-name "CDT" + "*Abbreviated name of daylight-savings time zone used for Chinese calendar.") + +(defvar chinese-calendar-daylight-savings-starts nil +; The correct value is as follows, but I don't believe the Chinese calendrical +; authorities would use DST in determining astronomical events: +; '(cond ((< 1986 year) (calendar-nth-named-day 1 0 4 year 10)) +; ((= 1986 year) '(5 4 1986)) +; (t nil)) + "*Sexp giving the date on which daylight savings time starts for Chinese +calendar. Default is for no daylight savings time. See documentation of +`calendar-daylight-savings-starts'.") + +(defvar chinese-calendar-daylight-savings-ends nil +; The correct value is as follows, but I don't believe the Chinese calendrical +; authorities would use DST in determining astronomical events: +; '(if (<= 1986 year) (calendar-nth-named-day 1 0 9 year 11)) + "*Sexp giving the date on which daylight savings time ends for Chinese +calendar. Default is for no daylight savings time. See documentation of +`calendar-daylight-savings-ends'.") + +(defvar chinese-calendar-daylight-savings-starts-time 0 + "*Number of minutes after midnight that daylight savings time starts for +Chinese calendar. Default is for no daylight savings time.") + +(defvar chinese-calendar-daylight-savings-ends-time 0 + "*Number of minutes after midnight that daylight savings time ends for +Chinese calendar. Default is for no daylight savings time.") + +(defun chinese-zodiac-sign-on-or-after (d) + "Absolute date of first new Zodiac sign on or after absolute date d. +The Zodiac signs begin when the sun's longitude is a multiple of 30 degrees." + (let* ((year (extract-calendar-year + (calendar-gregorian-from-absolute + (floor (calendar-absolute-from-astro d))))) + (calendar-time-zone (eval chinese-calendar-time-zone)) + (calendar-daylight-time-offset + chinese-calendar-daylight-time-offset) + (calendar-standard-time-zone-name + chinese-calendar-standard-time-zone-name) + (calendar-daylight-time-zone-name + chinese-calendar-daylight-time-zone-name) + (calendar-calendar-daylight-savings-starts + chinese-calendar-daylight-savings-starts) + (calendar-daylight-savings-ends + chinese-calendar-daylight-savings-ends) + (calendar-daylight-savings-starts-time + chinese-calendar-daylight-savings-starts-time) + (calendar-daylight-savings-ends-time + chinese-calendar-daylight-savings-ends-time)) + (floor + (calendar-absolute-from-astro + (solar-date-next-longitude + (calendar-astro-from-absolute d) + 30))))) + +(defun chinese-new-moon-on-or-after (d) + "Absolute date of first new moon on or after absolute date d." + (let* ((year (extract-calendar-year + (calendar-gregorian-from-absolute d))) + (calendar-time-zone (eval chinese-calendar-time-zone)) + (calendar-daylight-time-offset + chinese-calendar-daylight-time-offset) + (calendar-standard-time-zone-name + chinese-calendar-standard-time-zone-name) + (calendar-daylight-time-zone-name + chinese-calendar-daylight-time-zone-name) + (calendar-calendar-daylight-savings-starts + chinese-calendar-daylight-savings-starts) + (calendar-daylight-savings-ends + chinese-calendar-daylight-savings-ends) + (calendar-daylight-savings-starts-time + chinese-calendar-daylight-savings-starts-time) + (calendar-daylight-savings-ends-time + chinese-calendar-daylight-savings-ends-time)) + (floor + (calendar-absolute-from-astro + (lunar-new-moon-on-or-after + (calendar-astro-from-absolute d)))))) + +(defun calendar-absolute-from-chinese (date) + "The number of days elapsed between the Gregorian date 12/31/1 BC and DATE. +The Gregorian date Sunday, December 31, 1 BC is imaginary." + (let* ((cycle (car date)) + (year (car (cdr date))) + (month (car (cdr (cdr date)))) + (day (car (cdr (cdr (cdr date))))) + (g-year (+ (* (1- cycle) 60);; years in prior cycles + (1- year);; prior years this cycle + -2636));; years before absolute date 0 + (new-year (chinese-new-year g-year)) + (current-month new-year) + (current-month-number 1) + (next-month (chinese-new-moon-on-or-after (1+ new-year))) + (next-sign (chinese-zodiac-sign-on-or-after + (1+ (chinese-zodiac-sign-on-or-after current-month)))) + (had-leap-month nil)) + (while (< current-month-number month) + ;; current-month < next-month <= next-sign + (setq current-month next-month) + (setq next-month (chinese-new-moon-on-or-after (1+ current-month))) + (if (and (<= next-month next-sign) (not had-leap-month)) + (progn;; leap month + (setq current-month-number (+ current-month-number 0.5)) + (setq had-leap-month t)) + (setq current-month-number (floor (1+ current-month-number))) + (setq next-sign (chinese-zodiac-sign-on-or-after (1+ next-sign))))) + (+ current-month (1- day)))) + +(defun calendar-chinese-from-absolute (date) + "Compute Chinese date (cycle year month day) corresponding to absolute DATE. +The absolute date is the number of days elapsed since the (imaginary) +Gregorian date Sunday, December 31, 1 BC." + (let* ((greg-date (calendar-gregorian-from-absolute date)) + (greg-year (1- (extract-calendar-year greg-date))) + (greg-year + (+ greg-year + (calendar-sum y greg-year + (>= date (chinese-new-year (1+ y))) 1)) ) + (chinese-year (+ greg-year 2697)) + (cycle (/ (1- chinese-year) 60)) ;; previous cycles + (year (calendar-mod chinese-year 60));; years this cycle + (current-month (chinese-new-year greg-year)) + (month 1) + (next-month (chinese-new-moon-on-or-after (1+ current-month))) + (next-sign (chinese-zodiac-sign-on-or-after + (1+ (chinese-zodiac-sign-on-or-after current-month)))) + (had-leap-month nil)) + (while (<= next-month date) + ;; current-month < next-month <= next-sign + (setq current-month next-month) + (setq next-month (chinese-new-moon-on-or-after (1+ current-month))) + (if (and (<= next-month next-sign) (not had-leap-month)) + (progn;; leap month + (setq month (+ month 0.5)) + (setq had-leap-month t)) + (setq month (floor (1+ month))) + (setq next-sign (chinese-zodiac-sign-on-or-after (1+ next-sign))))) + (list cycle year month (1+ (- date current-month))))) + +(defun chinese-new-year (year) + "The absolute date of Chinese New Year in Gregorian YEAR." + (let* ((last-solstice (chinese-zodiac-sign-on-or-after + (calendar-absolute-from-gregorian + (list 12 15 (1- year))))) + (twelfth-new-moon;; twelfth month of previous year + (chinese-new-moon-on-or-after (1+ last-solstice))) + (thirteenth-new-moon;; maybe leap month, maybe New Year + (chinese-new-moon-on-or-after (1+ twelfth-new-moon))) + (fourteenth-new-moon;; maybe New Year, maybe second month + (chinese-new-moon-on-or-after (1+ thirteenth-new-moon))) + (next-solstice (chinese-zodiac-sign-on-or-after + (calendar-absolute-from-gregorian (list 12 15 year)))) + (new-moons (+ 3 (calendar-sum m 0 + (< (chinese-new-moon-on-or-after + (+ fourteenth-new-moon (* 29 m))) + next-solstice) + 1)))) + (if (and (= new-moons 14) + (< (chinese-zodiac-sign-on-or-after + (calendar-absolute-from-gregorian (list 2 15 year))) + thirteenth-new-moon) + (<= fourteenth-new-moon + (chinese-zodiac-sign-on-or-after + (calendar-absolute-from-gregorian (list 3 15 year))))) + fourteeth-new-moon + thirteenth-new-moon))) + +(defun holiday-chinese-new-year () + "Date of Chinese New Year." + (let ((m displayed-month) + (y displayed-year)) + (increment-calendar-month m y 1) + (if (< m 5) + (let ((chinese-new-year + (calendar-gregorian-from-absolute + (chinese-new-year y)))) + (if (calendar-date-is-visible-p chinese-new-year) + (list (list chinese-new-year + (format "Chinese New Year (%s-%s)" + (aref chinese-calendar-celestial-stem + (% (+ y 6) 10)) + (aref chinese-calendar-terrestrial-branch + (% (+ y 8) 12)))))))))) + +(defun calendar-chinese-date-string (&optional date) + "String of Chinese date of Gregorian DATE. +Defaults to today's date if DATE is not given." + (let* ((a-date (calendar-absolute-from-gregorian + (or date (calendar-current-date)))) + (c-date (calendar-chinese-from-absolute a-date)) + (cycle (car c-date)) + (year (car (cdr c-date))) + (month (car (cdr (cdr c-date)))) + (day (car (cdr (cdr (cdr c-date))))) + (this-month (calendar-absolute-from-chinese + (list cycle year month 1))) + (next-month (calendar-absolute-from-chinese + (list cycle year (1+ month) 1))) + (month (floor month)) + (m-cycle (% (+ (* year 5) month) 60))) + (format "Cycle %s, year %s (%s-%s), %smonth %s, day %s (%s-%s)" + cycle + year + (aref chinese-calendar-celestial-stem (% (+ year 9) 10)) + (aref chinese-calendar-terrestrial-branch (% (+ year 11) 12)) + (if (not (integerp month)) + "second " + (if (< 30 (- next-month this-month)) + "first " + "")) + month + day + (aref chinese-calendar-celestial-stem (% (+ a-date 4) 10)) + (aref chinese-calendar-terrestrial-branch (% (+ a-date 2) 12))))) + +(defun calendar-print-chinese-date () + "Show the Chinese date equivalents of date." + (interactive) + (message "Computing Chinese date...") + (message "Chinese date: %s" + (calendar-chinese-date-string (calendar-cursor-to-date t)))) + +(defun calendar-goto-chinese-date (date &optional noecho) + "Move cursor to Chinese date DATE. +Echo Chinese date unless NOECHO is t." + (interactive + (let* ((c (calendar-chinese-from-absolute + (calendar-absolute-from-gregorian + (calendar-current-date)))) + (cycle (calendar-read + "Cycle number (>44): " + '(lambda (x) (> x 44)) + (int-to-string (car c)))) + (year (calendar-read + "Year in cycle (1..60): " + '(lambda (x) (and (<= 1 x) (<= x 60))) + (int-to-string (car (cdr c))))) + (month (read-minibuffer "Month: ")) + (day (read-minibuffer "Day: "))) + (list (list cycle year month day)))) + (calendar-goto-date (calendar-gregorian-from-absolute + (calendar-absolute-from-chinese date))) + (or noecho (calendar-print-chinese-date))) + +(defun diary-chinese-date () + "Chinese calendar equivalent of date diary entry." + (format "Chinese date: %s" (calendar-chinese-date-string date))) + +(provide 'cal-chinese) + +;;; cal-chinese ends here diff --git a/lisp/calendar/cal-coptic.el b/lisp/calendar/cal-coptic.el new file mode 100644 index 00000000000..04b786ec84c --- /dev/null +++ b/lisp/calendar/cal-coptic.el @@ -0,0 +1,233 @@ +;;; cal-coptic.el --- calendar functions for the Coptic/Ethiopic calendars. + +;; Copyright (C) 1995 Free Software Foundation, Inc. + +;; Author: Edward M. Reingold +;; Keywords: calendar +;; Human-Keywords: Coptic calendar, Ethiopic calendar, calendar, diary + +;; This file is part of GNU Emacs. + +;; GNU Emacs is free software; you can redistribute it and/or modify +;; it under the terms of the GNU General Public License as published by +;; the Free Software Foundation; either version 2, or (at your option) +;; any later version. + +;; GNU Emacs is distributed in the hope that it will be useful, +;; but WITHOUT ANY WARRANTY; without even the implied warranty of +;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;; GNU General Public License for more details. + +;; You should have received a copy of the GNU General Public License +;; along with GNU Emacs; see the file COPYING. If not, write to +;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + +;;; Commentary: + +;; This collection of functions implements the features of calendar.el and +;; diary.el that deal with the Coptic and Ethiopic calendars. + +;; Comments, corrections, and improvements should be sent to +;; Edward M. Reingold Department of Computer Science +;; (217) 333-6733 University of Illinois at Urbana-Champaign +;; reingold@cs.uiuc.edu 1304 West Springfield Avenue +;; Urbana, Illinois 61801 + +;;; Code: + +(require 'cal-julian) + +(defvar coptic-calendar-month-name-array + ["Tot" "Babe" "Hatur" "Kihak" "Tube" "Amshir" "Baramhat" "Barmuda" + "Bashnas" "Bauna" "Abib" "Misra" "Nisi"]) + +(defvar coptic-calendar-epoch (calendar-absolute-from-julian '(8 29 284)) + "Absolute date of start of Coptic calendar = August 29, 284 A.D. (Julian).") + +(defconst coptic-name "Coptic") + +(defun coptic-calendar-leap-year-p (year) + "True if YEAR is a leap year on the Coptic calendar." + (zerop (mod (1+ year) 4))) + +(defun coptic-calendar-last-day-of-month (month year) + "Return last day of MONTH, YEAR on the Coptic calendar. +The 13th month is not really a month, but the 5 (6 in leap years) day period of +Nisi (Kebus) at the end of the year." + (if (< month 13) + 30 + (if (coptic-calendar-leap-year-p year) + 6 + 5))) + +(defun calendar-absolute-from-coptic (date) + "Compute absolute date from Coptic date DATE. +The absolute date is the number of days elapsed since the (imaginary) +Gregorian date Sunday, December 31, 1 BC." + (let ((month (extract-calendar-month date)) + (day (extract-calendar-day date)) + (year (extract-calendar-year date))) + (+ (1- coptic-calendar-epoch);; Days before start of calendar + (* 365 (1- year)) ;; Days in prior years + (/ year 4) ;; Leap days in prior years + (* 30 (1- month)) ;; Days in prior months this year + day))) ;; Days so far this month + + +(defun calendar-coptic-from-absolute (date) + "Compute the Coptic equivalent for absolute date DATE. +The result is a list of the form (MONTH DAY YEAR). +The absolute date is the number of days elapsed since the imaginary +Gregorian date Sunday, December 31, 1 BC." + (if (< date coptic-calendar-epoch) + (list 0 0 0);; pre-Coptic date + (let* ((approx (/ (- date coptic-calendar-epoch) + 366)) ;; Approximation from below. + (year ;; Search forward from the approximation. + (+ approx + (calendar-sum y approx + (>= date (calendar-absolute-from-coptic (list 1 1 (1+ y)))) + 1))) + (month ;; Search forward from Tot. + (1+ (calendar-sum m 1 + (> date + (calendar-absolute-from-coptic + (list m + (coptic-calendar-last-day-of-month m year) + year))) + 1))) + (day ;; Calculate the day by subtraction. + (- date + (1- (calendar-absolute-from-coptic (list month 1 year)))))) + (list month day year)))) + +(defun calendar-coptic-date-string (&optional date) + "String of Coptic date of Gregorian DATE. +Returns the empty string if DATE is pre-Coptic calendar. +Defaults to today's date if DATE is not given." + (let* ((coptic-date (calendar-coptic-from-absolute + (calendar-absolute-from-gregorian + (or date (calendar-current-date))))) + (y (extract-calendar-year coptic-date)) + (m (extract-calendar-month coptic-date))) + (if (< y 1) + "" + (let ((monthname (aref coptic-calendar-month-name-array (1- m))) + (day (int-to-string (extract-calendar-day coptic-date))) + (dayname nil) + (month (int-to-string m)) + (year (int-to-string y))) + (mapconcat 'eval calendar-date-display-form ""))))) + +(defun calendar-print-coptic-date () + "Show the Coptic calendar equivalent of the selected date." + (interactive) + (let ((f (calendar-coptic-date-string (calendar-cursor-to-date t)))) + (if (string-equal f "") + (message "Date is pre-%s calendar" coptic-name) + (message f)))) + +(defun calendar-goto-coptic-date (date &optional noecho) + "Move cursor to Coptic date DATE. +Echo Coptic date unless NOECHO is t." + (interactive (coptic-prompt-for-date)) + (calendar-goto-date (calendar-gregorian-from-absolute + (calendar-absolute-from-coptic date))) + (or noecho (calendar-print-coptic-date))) + +(defun coptic-prompt-for-date () + "Ask for a Coptic date." + (let* ((today (calendar-current-date)) + (year (calendar-read + (format "%s calendar year (>0): " coptic-name) + '(lambda (x) (> x 0)) + (int-to-string + (extract-calendar-year + (calendar-coptic-from-absolute + (calendar-absolute-from-gregorian today)))))) + (completion-ignore-case t) + (month (cdr (assoc + (capitalize + (completing-read + (format "%s calendar month name: " coptic-name) + (mapcar 'list + (append coptic-calendar-month-name-array nil)) + nil t)) + (calendar-make-alist coptic-calendar-month-name-array + 1 'capitalize)))) + (last (coptic-calendar-last-day-of-month month year)) + (day (calendar-read + (format "%s calendar day (1-%d): " coptic-name last) + '(lambda (x) (and (< 0 x) (<= x last)))))) + (list (list month day year)))) + +(defun diary-coptic-date () + "Coptic calendar equivalent of date diary entry." + (let ((f (calendar-coptic-date-string (calendar-cursor-to-date t)))) + (if (string-equal f "") + (format "Date is pre-%s calendar" coptic-name) + f))) + +(defconst ethiopic-calendar-month-name-array + ["Maskarram" "Tekemt" "Hadar" "Tahsas" "Tarr" "Yekatit" "Magawit" "Miaziah" + "Genbot" "Sanni" "Hamle" "Nas'hi" "Pagnem"]) + +(defconst ethiopic-calendar-epoch (calendar-absolute-from-julian '(8 29 7)) + "Absolute date of start of Ethiopic calendar = August 29, 7 A.D. (Julian).") + +(defconst ethiopic-name "Ethiopic") + +(defun calendar-absolute-from-ethiopic (date) + "Compute absolute date from Ethiopic date DATE. +The absolute date is the number of days elapsed since the (imaginary) +Gregorian date Sunday, December 31, 1 BC." + (let ((coptic-calendar-epoch ethiopic-calendar-epoch)) + (calendar-absolute-from-coptic date))) + +(defun calendar-ethiopic-from-absolute (date) + "Compute the Ethiopic equivalent for absolute date DATE. +The result is a list of the form (MONTH DAY YEAR). +The absolute date is the number of days elapsed since the imaginary +Gregorian date Sunday, December 31, 1 BC." + (let ((coptic-calendar-epoch ethiopic-calendar-epoch)) + (calendar-coptic-from-absolute date))) + +(defun calendar-ethiopic-date-string (&optional date) + "String of Ethiopic date of Gregorian DATE. +Returns the empty string if DATE is pre-Ethiopic calendar. +Defaults to today's date if DATE is not given." + (let ((coptic-calendar-epoch ethiopic-calendar-epoch) + (coptic-name ethiopic-name) + (coptic-calendar-month-name-array ethiopic-calendar-month-name-array)) + (calendar-coptic-date-string date))) + +(defun calendar-print-ethiopic-date () + "Show the Ethiopic calendar equivalent of the selected date." + (interactive) + (let ((coptic-calendar-epoch ethiopic-calendar-epoch) + (coptic-name ethiopic-name) + (coptic-calendar-month-name-array ethiopic-calendar-month-name-array)) + (call-interactively 'calendar-print-coptic-date))) + +(defun calendar-goto-ethiopic-date (date &optional noecho) + "Move cursor to Ethiopic date DATE. +Echo Ethiopic date unless NOECHO is t." + (interactive + (let ((coptic-calendar-epoch ethiopic-calendar-epoch) + (coptic-name ethiopic-name) + (coptic-calendar-month-name-array ethiopic-calendar-month-name-array)) + (coptic-prompt-for-date))) + (calendar-goto-date (calendar-gregorian-from-absolute + (calendar-absolute-from-ethiopic date))) + (or noecho (calendar-print-ethiopic-date))) + +(defun diary-ethiopic-date () + "Ethiopic calendar equivalent of date diary entry." + (let ((coptic-calendar-epoch ethiopic-calendar-epoch) + (coptic-name ethiopic-name) + (coptic-calendar-month-name-array ethiopic-calendar-month-name-array)) + (diary-coptic-date))) + +(provide 'cal-coptic) + +;;; cal-coptic.el ends here diff --git a/lisp/calendar/cal-islam.el b/lisp/calendar/cal-islam.el new file mode 100644 index 00000000000..f518d266360 --- /dev/null +++ b/lisp/calendar/cal-islam.el @@ -0,0 +1,491 @@ +;;; cal-islamic.el --- calendar functions for the Islamic calendar. + +;; Copyright (C) 1995 Free Software Foundation, Inc. + +;; Author: Edward M. Reingold +;; Keywords: calendar +;; Human-Keywords: Islamic calendar, calendar, diary + +;; This file is part of GNU Emacs. + +;; GNU Emacs is free software; you can redistribute it and/or modify +;; it under the terms of the GNU General Public License as published by +;; the Free Software Foundation; either version 2, or (at your option) +;; any later version. + +;; GNU Emacs is distributed in the hope that it will be useful, +;; but WITHOUT ANY WARRANTY; without even the implied warranty of +;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;; GNU General Public License for more details. + +;; You should have received a copy of the GNU General Public License +;; along with GNU Emacs; see the file COPYING. If not, write to +;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + +;;; Commentary: + +;; This collection of functions implements the features of calendar.el and +;; diary.el that deal with the Islamic calendar. + +;; Comments, corrections, and improvements should be sent to +;; Edward M. Reingold Department of Computer Science +;; (217) 333-6733 University of Illinois at Urbana-Champaign +;; reingold@cs.uiuc.edu 1304 West Springfield Avenue +;; Urbana, Illinois 61801 + +;;; Code: + +(require 'cal-julian) + +(defvar calendar-islamic-month-name-array + ["Muharram" "Safar" "Rabi I" "Rabi II" "Jumada I" "Jumada II" + "Rajab" "Sha'ban" "Ramadan" "Shawwal" "Dhu al-Qada" "Dhu al-Hijjah"]) + +(defvar calendar-islamic-epoch (calendar-absolute-from-julian '(7 16 622)) + "Absolute date of start of Islamic calendar = August 29, 284 A.D. (Julian).") + +(defun islamic-calendar-leap-year-p (year) + "Returns t if YEAR is a leap year on the Islamic calendar." + (memq (% year 30) + (list 2 5 7 10 13 16 18 21 24 26 29))) + +(defun islamic-calendar-last-day-of-month (month year) + "The last day in MONTH during YEAR on the Islamic calendar." + (cond + ((memq month (list 1 3 5 7 9 11)) 30) + ((memq month (list 2 4 6 8 10)) 29) + (t (if (islamic-calendar-leap-year-p year) 30 29)))) + +(defun islamic-calendar-day-number (date) + "Return the day number within the year of the Islamic date DATE." + (let* ((month (extract-calendar-month date)) + (day (extract-calendar-day date))) + (+ (* 30 (/ month 2)) + (* 29 (/ (1- month) 2)) + day))) + +(defun calendar-absolute-from-islamic (date) + "Absolute date of Islamic DATE. +The absolute date is the number of days elapsed since the (imaginary) +Gregorian date Sunday, December 31, 1 BC." + (let* ((month (extract-calendar-month date)) + (day (extract-calendar-day date)) + (year (extract-calendar-year date)) + (y (% year 30)) + (leap-years-in-cycle + (cond + ((< y 3) 0) ((< y 6) 1) ((< y 8) 2) ((< y 11) 3) ((< y 14) 4) + ((< y 17) 5) ((< y 19) 6) ((< y 22) 7) ((< y 25) 8) ((< y 27) 9) + (t 10)))) + (+ (islamic-calendar-day-number date);; days so far this year + (* (1- year) 354) ;; days in all non-leap years + (* 11 (/ year 30)) ;; leap days in complete cycles + leap-years-in-cycle ;; leap days this cycle + (1- calendar-islamic-epoch)))) ;; days before start of calendar + +(defun calendar-islamic-from-absolute (date) + "Compute the Islamic date (month day year) corresponding to absolute DATE. +The absolute date is the number of days elapsed since the (imaginary) +Gregorian date Sunday, December 31, 1 BC." + (if (< date calendar-islamic-epoch) + (list 0 0 0);; pre-Islamic date + (let* ((approx (/ (- date calendar-islamic-epoch) + 355));; Approximation from below. + (year ;; Search forward from the approximation. + (+ approx + (calendar-sum y approx + (>= date (calendar-absolute-from-islamic + (list 1 1 (1+ y)))) + 1))) + (month ;; Search forward from Muharram. + (1+ (calendar-sum m 1 + (> date + (calendar-absolute-from-islamic + (list m + (islamic-calendar-last-day-of-month + m year) + year))) + 1))) + (day ;; Calculate the day by subtraction. + (- date + (1- (calendar-absolute-from-islamic (list month 1 year)))))) + (list month day year)))) + +(defun calendar-islamic-date-string (&optional date) + "String of Islamic date before sunset of Gregorian DATE. +Returns the empty string if DATE is pre-Islamic. +Defaults to today's date if DATE is not given. +Driven by the variable `calendar-date-display-form'." + (let ((calendar-month-name-array calendar-islamic-month-name-array) + (islamic-date (calendar-islamic-from-absolute + (calendar-absolute-from-gregorian + (or date (calendar-current-date)))))) + (if (< (extract-calendar-year islamic-date) 1) + "" + (calendar-date-string islamic-date nil t)))) + +(defun calendar-print-islamic-date () + "Show the Islamic calendar equivalent of the date under the cursor." + (interactive) + (let ((i (calendar-islamic-date-string (calendar-cursor-to-date t)))) + (if (string-equal i "") + (message "Date is pre-Islamic") + (message "Islamic date (until sunset): %s" i)))) + +(defun calendar-goto-islamic-date (date &optional noecho) + "Move cursor to Islamic DATE; echo Islamic date unless NOECHO is t." + (interactive + (let* ((today (calendar-current-date)) + (year (calendar-read + "Islamic calendar year (>0): " + '(lambda (x) (> x 0)) + (int-to-string + (extract-calendar-year + (calendar-islamic-from-absolute + (calendar-absolute-from-gregorian today)))))) + (month-array calendar-islamic-month-name-array) + (completion-ignore-case t) + (month (cdr (assoc + (capitalize + (completing-read + "Islamic calendar month name: " + (mapcar 'list (append month-array nil)) + nil t)) + (calendar-make-alist month-array 1 'capitalize)))) + (last (islamic-calendar-last-day-of-month month year)) + (day (calendar-read + (format "Islamic calendar day (1-%d): " last) + '(lambda (x) (and (< 0 x) (<= x last)))))) + (list (list month day year)))) + (calendar-goto-date (calendar-gregorian-from-absolute + (calendar-absolute-from-islamic date))) + (or noecho (calendar-print-islamic-date))) + +(defun diary-islamic-date () + "Islamic calendar equivalent of date diary entry." + (let ((i (calendar-islamic-date-string (calendar-cursor-to-date t)))) + (if (string-equal i "") + "Date is pre-Islamic" + (format "Islamic date (until sunset): %s" i)))) + +(defun holiday-islamic (month day string) + "Holiday on MONTH, DAY (Islamic) called STRING. +If MONTH, DAY (Islamic) is visible, the value returned is corresponding +Gregorian date in the form of the list (((month day year) STRING)). Returns +nil if it is not visible in the current calendar window." + (let* ((islamic-date (calendar-islamic-from-absolute + (calendar-absolute-from-gregorian + (list displayed-month 15 displayed-year)))) + (m (extract-calendar-month islamic-date)) + (y (extract-calendar-year islamic-date)) + (date)) + (if (< m 1) + nil;; Islamic calendar doesn't apply. + (increment-calendar-month m y (- 10 month)) + (if (> m 7);; Islamic date might be visible + (let ((date (calendar-gregorian-from-absolute + (calendar-absolute-from-islamic (list month day y))))) + (if (calendar-date-is-visible-p date) + (list (list date string)))))))) + +(defun list-islamic-diary-entries () + "Add any Islamic date entries from the diary file to `diary-entries-list'. +Islamic date diary entries must be prefaced by an `islamic-diary-entry-symbol' +\(normally an `I'). The same diary date forms govern the style of the Islamic +calendar entries, except that the Islamic month names must be spelled in full. +The Islamic months are numbered from 1 to 12 with Muharram being 1 and 12 being +Dhu al-Hijjah. If an Islamic date diary entry begins with a +`diary-nonmarking-symbol', the entry will appear in the diary listing, but will +not be marked in the calendar. This function is provided for use with the +`nongregorian-diary-listing-hook'." + (if (< 0 number) + (let ((buffer-read-only nil) + (diary-modified (buffer-modified-p)) + (gdate original-date) + (mark (regexp-quote diary-nonmarking-symbol))) + (calendar-for-loop i from 1 to number do + (let* ((d diary-date-forms) + (idate (calendar-islamic-from-absolute + (calendar-absolute-from-gregorian gdate))) + (month (extract-calendar-month idate)) + (day (extract-calendar-day idate)) + (year (extract-calendar-year idate))) + (while d + (let* + ((date-form (if (equal (car (car d)) 'backup) + (cdr (car d)) + (car d))) + (backup (equal (car (car d)) 'backup)) + (dayname + (concat + (calendar-day-name gdate) "\\|" + (substring (calendar-day-name gdate) 0 3) ".?")) + (calendar-month-name-array + calendar-islamic-month-name-array) + (monthname + (concat + "\\*\\|" + (calendar-month-name month))) + (month (concat "\\*\\|0*" (int-to-string month))) + (day (concat "\\*\\|0*" (int-to-string day))) + (year + (concat + "\\*\\|0*" (int-to-string year) + (if abbreviated-calendar-year + (concat "\\|" (int-to-string (% year 100))) + ""))) + (regexp + (concat + "\\(\\`\\|\^M\\|\n\\)" mark "?" + (regexp-quote islamic-diary-entry-symbol) + "\\(" + (mapconcat 'eval date-form "\\)\\(") + "\\)")) + (case-fold-search t)) + (goto-char (point-min)) + (while (re-search-forward regexp nil t) + (if backup (re-search-backward "\\<" nil t)) + (if (and (or (char-equal (preceding-char) ?\^M) + (char-equal (preceding-char) ?\n)) + (not (looking-at " \\|\^I"))) + ;; Diary entry that consists only of date. + (backward-char 1) + ;; Found a nonempty diary entry--make it visible and + ;; add it to the list. + (let ((entry-start (point)) + (date-start)) + (re-search-backward "\^M\\|\n\\|\\`") + (setq date-start (point)) + (re-search-forward "\^M\\|\n" nil t 2) + (while (looking-at " \\|\^I") + (re-search-forward "\^M\\|\n" nil t)) + (backward-char 1) + (subst-char-in-region date-start (point) ?\^M ?\n t) + (add-to-diary-list + gdate (buffer-substring entry-start (point))))))) + (setq d (cdr d)))) + (setq gdate + (calendar-gregorian-from-absolute + (1+ (calendar-absolute-from-gregorian gdate))))) + (set-buffer-modified-p diary-modified)) + (goto-char (point-min)))) + +(defun mark-islamic-diary-entries () + "Mark days in the calendar window that have Islamic date diary entries. +Each entry in diary-file (or included files) visible in the calendar window +is marked. Islamic date entries are prefaced by a islamic-diary-entry-symbol +\(normally an `I'). The same diary-date-forms govern the style of the Islamic +calendar entries, except that the Islamic month names must be spelled in full. +The Islamic months are numbered from 1 to 12 with Muharram being 1 and 12 being +Dhu al-Hijjah. Islamic date diary entries that begin with a +diary-nonmarking-symbol will not be marked in the calendar. This function is +provided for use as part of the nongregorian-diary-marking-hook." + (let ((d diary-date-forms)) + (while d + (let* + ((date-form (if (equal (car (car d)) 'backup) + (cdr (car d)) + (car d)));; ignore 'backup directive + (dayname (diary-name-pattern calendar-day-name-array)) + (monthname + (concat + (diary-name-pattern calendar-islamic-month-name-array t) + "\\|\\*")) + (month "[0-9]+\\|\\*") + (day "[0-9]+\\|\\*") + (year "[0-9]+\\|\\*") + (l (length date-form)) + (d-name-pos (- l (length (memq 'dayname date-form)))) + (d-name-pos (if (/= l d-name-pos) (+ 2 d-name-pos))) + (m-name-pos (- l (length (memq 'monthname date-form)))) + (m-name-pos (if (/= l m-name-pos) (+ 2 m-name-pos))) + (d-pos (- l (length (memq 'day date-form)))) + (d-pos (if (/= l d-pos) (+ 2 d-pos))) + (m-pos (- l (length (memq 'month date-form)))) + (m-pos (if (/= l m-pos) (+ 2 m-pos))) + (y-pos (- l (length (memq 'year date-form)))) + (y-pos (if (/= l y-pos) (+ 2 y-pos))) + (regexp + (concat + "\\(\\`\\|\^M\\|\n\\)" + (regexp-quote islamic-diary-entry-symbol) + "\\(" + (mapconcat 'eval date-form "\\)\\(") + "\\)")) + (case-fold-search t)) + (goto-char (point-min)) + (while (re-search-forward regexp nil t) + (let* ((dd-name + (if d-name-pos + (buffer-substring + (match-beginning d-name-pos) + (match-end d-name-pos)))) + (mm-name + (if m-name-pos + (buffer-substring + (match-beginning m-name-pos) + (match-end m-name-pos)))) + (mm (string-to-int + (if m-pos + (buffer-substring + (match-beginning m-pos) + (match-end m-pos)) + ""))) + (dd (string-to-int + (if d-pos + (buffer-substring + (match-beginning d-pos) + (match-end d-pos)) + ""))) + (y-str (if y-pos + (buffer-substring + (match-beginning y-pos) + (match-end y-pos)))) + (yy (if (not y-str) + 0 + (if (and (= (length y-str) 2) + abbreviated-calendar-year) + (let* ((current-y + (extract-calendar-year + (calendar-islamic-from-absolute + (calendar-absolute-from-gregorian + (calendar-current-date))))) + (y (+ (string-to-int y-str) + (* 100 (/ current-y 100))))) + (if (> (- y current-y) 50) + (- y 100) + (if (> (- current-y y) 50) + (+ y 100) + y))) + (string-to-int y-str))))) + (if dd-name + (mark-calendar-days-named + (cdr (assoc (capitalize (substring dd-name 0 3)) + (calendar-make-alist + calendar-day-name-array + 0 + '(lambda (x) (substring x 0 3)))))) + (if mm-name + (if (string-equal mm-name "*") + (setq mm 0) + (setq mm + (cdr (assoc + (capitalize mm-name) + (calendar-make-alist + calendar-islamic-month-name-array)))))) + (mark-islamic-calendar-date-pattern mm dd yy))))) + (setq d (cdr d))))) + +(defun mark-islamic-calendar-date-pattern (month day year) + "Mark dates in calendar window that conform to Islamic date MONTH/DAY/YEAR. +A value of 0 in any position is a wildcard." + (save-excursion + (set-buffer calendar-buffer) + (if (and (/= 0 month) (/= 0 day)) + (if (/= 0 year) + ;; Fully specified Islamic date. + (let ((date (calendar-gregorian-from-absolute + (calendar-absolute-from-islamic + (list month day year))))) + (if (calendar-date-is-visible-p date) + (mark-visible-calendar-date date))) + ;; Month and day in any year--this taken from the holiday stuff. + (let* ((islamic-date (calendar-islamic-from-absolute + (calendar-absolute-from-gregorian + (list displayed-month 15 displayed-year)))) + (m (extract-calendar-month islamic-date)) + (y (extract-calendar-year islamic-date)) + (date)) + (if (< m 1) + nil;; Islamic calendar doesn't apply. + (increment-calendar-month m y (- 10 month)) + (if (> m 7);; Islamic date might be visible + (let ((date (calendar-gregorian-from-absolute + (calendar-absolute-from-islamic + (list month day y))))) + (if (calendar-date-is-visible-p date) + (mark-visible-calendar-date date))))))) + ;; Not one of the simple cases--check all visible dates for match. + ;; Actually, the following code takes care of ALL of the cases, but + ;; it's much too slow to be used for the simple (common) cases. + (let ((m displayed-month) + (y displayed-year) + (first-date) + (last-date)) + (increment-calendar-month m y -1) + (setq first-date + (calendar-absolute-from-gregorian + (list m 1 y))) + (increment-calendar-month m y 2) + (setq last-date + (calendar-absolute-from-gregorian + (list m (calendar-last-day-of-month m y) y))) + (calendar-for-loop date from first-date to last-date do + (let* ((i-date (calendar-islamic-from-absolute date)) + (i-month (extract-calendar-month i-date)) + (i-day (extract-calendar-day i-date)) + (i-year (extract-calendar-year i-date))) + (and (or (zerop month) + (= month i-month)) + (or (zerop day) + (= day i-day)) + (or (zerop year) + (= year i-year)) + (mark-visible-calendar-date + (calendar-gregorian-from-absolute date))))))))) + +(defun insert-islamic-diary-entry (arg) + "Insert a diary entry. +For the Islamic date corresponding to the date indicated by point. +Prefix arg will make the entry nonmarking." + (interactive "P") + (let* ((calendar-month-name-array calendar-islamic-month-name-array)) + (make-diary-entry + (concat + islamic-diary-entry-symbol + (calendar-date-string + (calendar-islamic-from-absolute + (calendar-absolute-from-gregorian + (calendar-cursor-to-date t))) + nil t)) + arg))) + +(defun insert-monthly-islamic-diary-entry (arg) + "Insert a monthly diary entry. +For the day of the Islamic month corresponding to the date indicated by point. +Prefix arg will make the entry nonmarking." + (interactive "P") + (let* ((calendar-date-display-form + (if european-calendar-style '(day " * ") '("* " day ))) + (calendar-month-name-array calendar-islamic-month-name-array)) + (make-diary-entry + (concat + islamic-diary-entry-symbol + (calendar-date-string + (calendar-islamic-from-absolute + (calendar-absolute-from-gregorian + (calendar-cursor-to-date t))))) + arg))) + +(defun insert-yearly-islamic-diary-entry (arg) + "Insert an annual diary entry. +For the day of the Islamic year corresponding to the date indicated by point. +Prefix arg will make the entry nonmarking." + (interactive "P") + (let* ((calendar-date-display-form + (if european-calendar-style + '(day " " monthname) + '(monthname " " day))) + (calendar-month-name-array calendar-islamic-month-name-array)) + (make-diary-entry + (concat + islamic-diary-entry-symbol + (calendar-date-string + (calendar-islamic-from-absolute + (calendar-absolute-from-gregorian + (calendar-cursor-to-date t))))) + arg))) + +(provide 'cal-islamic) + +;;; cal-islamic.el ends here diff --git a/lisp/calendar/cal-iso.el b/lisp/calendar/cal-iso.el new file mode 100644 index 00000000000..b8044188508 --- /dev/null +++ b/lisp/calendar/cal-iso.el @@ -0,0 +1,125 @@ +;;; cal-iso.el --- calendar functions for the ISO calendar. + +;; Copyright (C) 1995 Free Software Foundation, Inc. + +;; Author: Edward M. Reingold +;; Keywords: calendar +;; Human-Keywords: ISO calendar, calendar, diary + +;; This file is part of GNU Emacs. + +;; GNU Emacs is free software; you can redistribute it and/or modify +;; it under the terms of the GNU General Public License as published by +;; the Free Software Foundation; either version 2, or (at your option) +;; any later version. + +;; GNU Emacs is distributed in the hope that it will be useful, +;; but WITHOUT ANY WARRANTY; without even the implied warranty of +;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;; GNU General Public License for more details. + +;; You should have received a copy of the GNU General Public License +;; along with GNU Emacs; see the file COPYING. If not, write to +;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + +;;; Commentary: + +;; This collection of functions implements the features of calendar.el and +;; diary.el that deal with the ISO calendar. + +;; Comments, corrections, and improvements should be sent to +;; Edward M. Reingold Department of Computer Science +;; (217) 333-6733 University of Illinois at Urbana-Champaign +;; reingold@cs.uiuc.edu 1304 West Springfield Avenue +;; Urbana, Illinois 61801 + +;;; Code: + +(require 'calendar) + +(defun calendar-absolute-from-iso (date) + "The number of days elapsed between the Gregorian date 12/31/1 BC and DATE. +The `ISO year' corresponds approximately to the Gregorian year, but +weeks start on Monday and end on Sunday. The first week of the ISO year is +the first such week in which at least 4 days are in a year. The ISO +commercial DATE has the form (week day year) in which week is in the range +1..52 and day is in the range 0..6 (1 = Monday, 2 = Tuesday, ..., 0 = +Sunday). The Gregorian date Sunday, December 31, 1 BC is imaginary." + (let* ((week (extract-calendar-month date)) + (day (extract-calendar-day date)) + (year (extract-calendar-year date))) + (+ (calendar-dayname-on-or-before + 1 (+ 3 (calendar-absolute-from-gregorian (list 1 1 year)))) + (* 7 (1- week)) + (if (= day 0) 6 (1- day))))) + +(defun calendar-iso-from-absolute (date) + "Compute the `ISO commercial date' corresponding to the absolute DATE. +The ISO year corresponds approximately to the Gregorian year, but weeks +start on Monday and end on Sunday. The first week of the ISO year is the +first such week in which at least 4 days are in a year. The ISO commercial +date has the form (week day year) in which week is in the range 1..52 and +day is in the range 0..6 (1 = Monday, 2 = Tuesday, ..., 0 = Sunday). The +absolute date is the number of days elapsed since the (imaginary) Gregorian +date Sunday, December 31, 1 BC." + (let* ((approx (extract-calendar-year + (calendar-gregorian-from-absolute (- date 3)))) + (year (+ approx + (calendar-sum y approx + (>= date (calendar-absolute-from-iso (list 1 1 (1+ y)))) + 1)))) + (list + (1+ (/ (- date (calendar-absolute-from-iso (list 1 1 year))) 7)) + (% date 7) + year))) + +(defun calendar-iso-date-string (&optional date) + "String of ISO date of Gregorian DATE. +Defaults to today's date if DATE is not given." + (let* ((d (calendar-absolute-from-gregorian + (or date (calendar-current-date)))) + (day (% d 7)) + (iso-date (calendar-iso-from-absolute d))) + (format "Day %s of week %d of %d" + (if (zerop day) 7 day) + (extract-calendar-month iso-date) + (extract-calendar-year iso-date)))) + +(defun calendar-print-iso-date () + "Show equivalent ISO date for the date under the cursor." + (interactive) + (message "ISO date: %s" + (calendar-iso-date-string (calendar-cursor-to-date t)))) + +(defun calendar-goto-iso-date (date &optional noecho) + "Move cursor to ISO DATE; echo ISO date unless NOECHO is t." + (interactive + (let* ((today (calendar-current-date)) + (year (calendar-read + "ISO calendar year (>0): " + '(lambda (x) (> x 0)) + (int-to-string (extract-calendar-year today)))) + (no-weeks (extract-calendar-month + (calendar-iso-from-absolute + (1- + (calendar-dayname-on-or-before + 1 (calendar-absolute-from-gregorian + (list 1 4 (1+ year)))))))) + (week (calendar-read + (format "ISO calendar week (1-%d): " no-weeks) + '(lambda (x) (and (> x 0) (<= x no-weeks))))) + (day (calendar-read + "ISO day (1-7): " + '(lambda (x) (and (<= 1 x) (<= x 7)))))) + (list (list week day year)))) + (calendar-goto-date (calendar-gregorian-from-absolute + (calendar-absolute-from-iso date))) + (or noecho (calendar-print-iso-date))) + +(defun diary-iso-date () + "ISO calendar equivalent of date diary entry." + (format "ISO date: %s" (calendar-iso-date-string date))) + +(provide 'cal-iso) + +;;; cal-iso.el ends here diff --git a/lisp/calendar/cal-julian.el b/lisp/calendar/cal-julian.el new file mode 100644 index 00000000000..a1f096bc2d8 --- /dev/null +++ b/lisp/calendar/cal-julian.el @@ -0,0 +1,206 @@ +;;; cal-julian.el --- calendar functions for the Julian calendar. + +;; Copyright (C) 1995 Free Software Foundation, Inc. + +;; Author: Edward M. Reingold +;; Keywords: calendar +;; Human-Keywords: Julian calendar, Julian day number, calendar, diary + +;; This file is part of GNU Emacs. + +;; GNU Emacs is free software; you can redistribute it and/or modify +;; it under the terms of the GNU General Public License as published by +;; the Free Software Foundation; either version 2, or (at your option) +;; any later version. + +;; GNU Emacs is distributed in the hope that it will be useful, +;; but WITHOUT ANY WARRANTY; without even the implied warranty of +;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;; GNU General Public License for more details. + +;; You should have received a copy of the GNU General Public License +;; along with GNU Emacs; see the file COPYING. If not, write to +;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + +;;; Commentary: + +;; This collection of functions implements the features of calendar.el and +;; diary.el that deal with the Julian calendar. + +;; Comments, corrections, and improvements should be sent to +;; Edward M. Reingold Department of Computer Science +;; (217) 333-6733 University of Illinois at Urbana-Champaign +;; reingold@cs.uiuc.edu 1304 West Springfield Avenue +;; Urbana, Illinois 61801 + +;;; Code: + +(require 'calendar) + +(defun calendar-julian-from-absolute (date) + "Compute the Julian (month day year) corresponding to the absolute DATE. +The absolute date is the number of days elapsed since the (imaginary) +Gregorian date Sunday, December 31, 1 BC." + (let* ((approx (/ (+ date 2) 366));; Approximation from below. + (year ;; Search forward from the approximation. + (+ approx + (calendar-sum y approx + (>= date (calendar-absolute-from-julian (list 1 1 (1+ y)))) + 1))) + (month ;; Search forward from January. + (1+ (calendar-sum m 1 + (> date + (calendar-absolute-from-julian + (list m + (if (and (= m 2) (= (% year 4) 0)) + 29 + (aref [31 28 31 30 31 30 31 31 30 31 30 31] + (1- m))) + year))) + 1))) + (day ;; Calculate the day by subtraction. + (- date (1- (calendar-absolute-from-julian (list month 1 year)))))) + (list month day year))) + +(defun calendar-absolute-from-julian (date) + "The number of days elapsed between the Gregorian date 12/31/1 BC and DATE. +The Gregorian date Sunday, December 31, 1 BC is imaginary." + (let ((month (extract-calendar-month date)) + (day (extract-calendar-day date)) + (year (extract-calendar-year date))) + (+ (calendar-day-number date) + (if (and (= (% year 100) 0) + (/= (% year 400) 0) + (> month 2)) + 1 0);; Correct for Julian but not Gregorian leap year. + (* 365 (1- year)) + (/ (1- year) 4) + -2))) + +(defun calendar-julian-date-string (&optional date) + "String of Julian date of Gregorian DATE. +Defaults to today's date if DATE is not given. +Driven by the variable `calendar-date-display-form'." + (calendar-date-string + (calendar-julian-from-absolute + (calendar-absolute-from-gregorian + (or date (calendar-current-date)))) + nil t)) + +(defun calendar-print-julian-date () + "Show the Julian calendar equivalent of the date under the cursor." + (interactive) + (message "Julian date: %s" + (calendar-julian-date-string (calendar-cursor-to-date t)))) + +(defun calendar-goto-julian-date (date &optional noecho) + "Move cursor to Julian DATE; echo Julian date unless NOECHO is t." + (interactive + (let* ((today (calendar-current-date)) + (year (calendar-read + "Julian calendar year (>0): " + '(lambda (x) (> x 0)) + (int-to-string + (extract-calendar-year + (calendar-julian-from-absolute + (calendar-absolute-from-gregorian + today)))))) + (month-array calendar-month-name-array) + (completion-ignore-case t) + (month (cdr (assoc + (capitalize + (completing-read + "Julian calendar month name: " + (mapcar 'list (append month-array nil)) + nil t)) + (calendar-make-alist month-array 1 'capitalize)))) + (last + (if (and (zerop (% year 4)) (= month 2)) + 29 + (aref [31 28 31 30 31 30 31 31 30 31 30 31] (1- month)))) + (day (calendar-read + (format "Julian calendar day (%d-%d): " + (if (and (= year 1) (= month 1)) 3 1) last) + '(lambda (x) + (and (< (if (and (= year 1) (= month 1)) 2 0) x) + (<= x last)))))) + (list (list month day year)))) + (calendar-goto-date (calendar-gregorian-from-absolute + (calendar-absolute-from-julian date))) + (or noecho (calendar-print-julian-date))) + +(defun holiday-julian (month day string) + "Holiday on MONTH, DAY (Julian) called STRING. +If MONTH, DAY (Julian) is visible, the value returned is corresponding +Gregorian date in the form of the list (((month day year) STRING)). Returns +nil if it is not visible in the current calendar window." + (let ((m1 displayed-month) + (y1 displayed-year) + (m2 displayed-month) + (y2 displayed-year) + (year)) + (increment-calendar-month m1 y1 -1) + (increment-calendar-month m2 y2 1) + (let* ((start-date (calendar-absolute-from-gregorian + (list m1 1 y1))) + (end-date (calendar-absolute-from-gregorian + (list m2 (calendar-last-day-of-month m2 y2) y2))) + (julian-start (calendar-julian-from-absolute start-date)) + (julian-end (calendar-julian-from-absolute end-date)) + (julian-y1 (extract-calendar-year julian-start)) + (julian-y2 (extract-calendar-year julian-end))) + (setq year (if (< 10 month) julian-y1 julian-y2)) + (let ((date (calendar-gregorian-from-absolute + (calendar-absolute-from-julian + (list month day year))))) + (if (calendar-date-is-visible-p date) + (list (list date string))))))) + +(defun diary-julian-date () + "Julian calendar equivalent of date diary entry." + (format "Julian date: %s" (calendar-julian-date-string date))) + +(defun calendar-absolute-from-astro (d) + "Absolute date of astronical (Julian) day number D." + (- d 1721424.5)) + +(defun calendar-astro-from-absolute (d) + "Astronomical (Julian) day number of absolute date D." + (+ d 1721424.5)) + +(defun calendar-astro-date-string (&optional date) + "String of astronomical (Julian) day number after noon UTC of Gregorian DATE. +Defaults to today's date if DATE is not given." + (int-to-string + (ceiling + (calendar-astro-from-absolute + (calendar-absolute-from-gregorian + (or date (calendar-current-date))))))) + +(defun calendar-print-astro-day-number () + "Show astronomical (Julian) day number after noon UTC on date shown by cursor." + (interactive) + (message + "Astronomical (Julian) day number (after noon UTC): %s" + (calendar-astro-date-string (calendar-cursor-to-date t)))) + +(defun calendar-goto-astro-day-number (daynumber &optional noecho) + "Move cursor to astronomical (Julian) DAYNUMBER. +Echo astronomical (Julian) day number unless NOECHO is t." + (interactive (list (calendar-read + "Astronomical (Julian) day number (>1721425): " + '(lambda (x) (> x 1721425))))) + (calendar-goto-date + (calendar-gregorian-from-absolute + (floor + (calendar-absolute-from-astro daynumber)))) + (or noecho (calendar-print-astro-day-number))) + +(defun diary-astro-day-number () + "Astronomical (Julian) day number diary entry." + (format "Astronomical (Julian) day number %s" + (calendar-astro-date-string date))) + +(provide 'cal-julian) + +;;; cal-julian.el ends here diff --git a/lisp/calendar/cal-move.el b/lisp/calendar/cal-move.el new file mode 100644 index 00000000000..bc9c710ee5d --- /dev/null +++ b/lisp/calendar/cal-move.el @@ -0,0 +1,314 @@ +;;; cal-move.el --- calendar functions for movement in the calendar + +;; Copyright (C) 1995 Free Software Foundation, Inc. + +;; Author: Edward M. Reingold +;; Keywords: calendar +;; Human-Keywords: calendar + +;; This file is part of GNU Emacs. + +;; GNU Emacs is free software; you can redistribute it and/or modify +;; it under the terms of the GNU General Public License as published by +;; the Free Software Foundation; either version 2, or (at your option) +;; any later version. + +;; GNU Emacs is distributed in the hope that it will be useful, +;; but WITHOUT ANY WARRANTY; without even the implied warranty of +;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;; GNU General Public License for more details. + +;; You should have received a copy of the GNU General Public License +;; along with GNU Emacs; see the file COPYING. If not, write to +;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + +;;; Commentary: + +;; This collection of functions implements movement in the calendar for +;; calendar.el. + +;; Comments, corrections, and improvements should be sent to +;; Edward M. Reingold Department of Computer Science +;; (217) 333-6733 University of Illinois at Urbana-Champaign +;; reingold@cs.uiuc.edu 1304 West Springfield Avenue +;; Urbana, Illinois 61801 + +;;; Code: + +(defun calendar-goto-today () + "Reposition the calendar window so the current date is visible." + (interactive) + (let ((today (calendar-current-date)));; The date might have changed. + (if (not (calendar-date-is-visible-p today)) + (generate-calendar-window) + (update-calendar-mode-line) + (calendar-cursor-to-visible-date today)))) + +(defun calendar-forward-month (arg) + "Move the cursor forward ARG months. +Movement is backward if ARG is negative." + (interactive "p") + (calendar-cursor-to-nearest-date) + (let* ((cursor-date (calendar-cursor-to-date t)) + (month (extract-calendar-month cursor-date)) + (day (extract-calendar-day cursor-date)) + (year (extract-calendar-year cursor-date))) + (increment-calendar-month month year arg) + (let ((last (calendar-last-day-of-month month year))) + (if (< last day) + (setq day last))) + ;; Put the new month on the screen, if needed, and go to the new date. + (let ((new-cursor-date (list month day year))) + (if (not (calendar-date-is-visible-p new-cursor-date)) + (calendar-other-month month year)) + (calendar-cursor-to-visible-date new-cursor-date)))) + +(defun calendar-forward-year (arg) + "Move the cursor forward by ARG years. +Movement is backward if ARG is negative." + (interactive "p") + (calendar-forward-month (* 12 arg))) + +(defun calendar-backward-month (arg) + "Move the cursor backward by ARG months. +Movement is forward if ARG is negative." + (interactive "p") + (calendar-forward-month (- arg))) + +(defun calendar-backward-year (arg) + "Move the cursor backward ARG years. +Movement is forward is ARG is negative." + (interactive "p") + (calendar-forward-month (* -12 arg))) + +(defun scroll-calendar-left (arg) + "Scroll the displayed calendar left by ARG months. +If ARG is negative the calendar is scrolled right. Maintains the relative +position of the cursor with respect to the calendar as well as possible." + (interactive "p") + (calendar-cursor-to-nearest-date) + (let ((old-date (calendar-cursor-to-date)) + (today (calendar-current-date))) + (if (/= arg 0) + (progn + (increment-calendar-month displayed-month displayed-year arg) + (generate-calendar-window displayed-month displayed-year) + (calendar-cursor-to-visible-date + (cond + ((calendar-date-is-visible-p old-date) old-date) + ((calendar-date-is-visible-p today) today) + (t (list displayed-month 1 displayed-year)))))))) + +(defun scroll-calendar-right (arg) + "Scroll the displayed calendar window right by ARG months. +If ARG is negative the calendar is scrolled left. Maintains the relative +position of the cursor with respect to the calendar as well as possible." + (interactive "p") + (scroll-calendar-left (- arg))) + +(defun scroll-calendar-left-three-months (arg) + "Scroll the displayed calendar window left by 3*ARG months. +If ARG is negative the calendar is scrolled right. Maintains the relative +position of the cursor with respect to the calendar as well as possible." + (interactive "p") + (scroll-calendar-left (* 3 arg))) + +(defun scroll-calendar-right-three-months (arg) + "Scroll the displayed calendar window right by 3*ARG months. +If ARG is negative the calendar is scrolled left. Maintains the relative +position of the cursor with respect to the calendar as well as possible." + (interactive "p") + (scroll-calendar-left (* -3 arg))) + +(defun calendar-cursor-to-nearest-date () + "Move the cursor to the closest date. +The position of the cursor is unchanged if it is already on a date. +Returns the list (month day year) giving the cursor position." + (let ((date (calendar-cursor-to-date)) + (column (current-column))) + (if date + date + (if (> 3 (count-lines (point-min) (point))) + (progn + (goto-line 3) + (move-to-column column))) + (if (not (looking-at "[0-9]")) + (if (and (not (looking-at " *$")) + (or (< column 25) + (and (> column 27) + (< column 50)) + (and (> column 52) + (< column 75)))) + (progn + (re-search-forward "[0-9]" nil t) + (backward-char 1)) + (re-search-backward "[0-9]" nil t))) + (calendar-cursor-to-date)))) + +(defun calendar-forward-day (arg) + "Move the cursor forward ARG days. +Moves backward if ARG is negative." + (interactive "p") + (if (/= 0 arg) + (let* + ((cursor-date (calendar-cursor-to-date)) + (cursor-date (if cursor-date + cursor-date + (if (> arg 0) (setq arg (1- arg))) + (calendar-cursor-to-nearest-date))) + (new-cursor-date + (calendar-gregorian-from-absolute + (+ (calendar-absolute-from-gregorian cursor-date) arg))) + (new-display-month (extract-calendar-month new-cursor-date)) + (new-display-year (extract-calendar-year new-cursor-date))) + ;; Put the new month on the screen, if needed, and go to the new date. + (if (not (calendar-date-is-visible-p new-cursor-date)) + (calendar-other-month new-display-month new-display-year)) + (calendar-cursor-to-visible-date new-cursor-date)))) + +(defun calendar-backward-day (arg) + "Move the cursor back ARG days. +Moves forward if ARG is negative." + (interactive "p") + (calendar-forward-day (- arg))) + +(defun calendar-forward-week (arg) + "Move the cursor forward ARG weeks. +Moves backward if ARG is negative." + (interactive "p") + (calendar-forward-day (* arg 7))) + +(defun calendar-backward-week (arg) + "Move the cursor back ARG weeks. +Moves forward if ARG is negative." + (interactive "p") + (calendar-forward-day (* arg -7))) + +(defun calendar-beginning-of-week (arg) + "Move the cursor back ARG calendar-week-start-day's." + (interactive "p") + (calendar-cursor-to-nearest-date) + (let ((day (calendar-day-of-week (calendar-cursor-to-date)))) + (calendar-backward-day + (if (= day calendar-week-start-day) + (* 7 arg) + (+ (mod (- day calendar-week-start-day) 7) + (* 7 (1- arg))))))) + +(defun calendar-end-of-week (arg) + "Move the cursor forward ARG calendar-week-start-day+6's." + (interactive "p") + (calendar-cursor-to-nearest-date) + (let ((day (calendar-day-of-week (calendar-cursor-to-date)))) + (calendar-forward-day + (if (= day (mod (1- calendar-week-start-day) 7)) + (* 7 arg) + (+ (- 6 (mod (- day calendar-week-start-day) 7)) + (* 7 (1- arg))))))) + +(defun calendar-beginning-of-month (arg) + "Move the cursor backward ARG month beginnings." + (interactive "p") + (calendar-cursor-to-nearest-date) + (let* ((date (calendar-cursor-to-date)) + (month (extract-calendar-month date)) + (day (extract-calendar-day date)) + (year (extract-calendar-year date))) + (if (= day 1) + (calendar-backward-month arg) + (calendar-cursor-to-visible-date (list month 1 year)) + (calendar-backward-month (1- arg))))) + +(defun calendar-end-of-month (arg) + "Move the cursor forward ARG month ends." + (interactive "p") + (calendar-cursor-to-nearest-date) + (let* ((date (calendar-cursor-to-date)) + (month (extract-calendar-month date)) + (day (extract-calendar-day date)) + (year (extract-calendar-year date)) + (last-day (calendar-last-day-of-month month year))) + (if (/= day last-day) + (progn + (calendar-cursor-to-visible-date (list month last-day year)) + (setq arg (1- arg)))) + (increment-calendar-month month year arg) + (let ((last-day (list + month + (calendar-last-day-of-month month year) + year))) + (if (not (calendar-date-is-visible-p last-day)) + (calendar-other-month month year) + (calendar-cursor-to-visible-date last-day))))) + +(defun calendar-beginning-of-year (arg) + "Move the cursor backward ARG year beginnings." + (interactive "p") + (calendar-cursor-to-nearest-date) + (let* ((date (calendar-cursor-to-date)) + (month (extract-calendar-month date)) + (day (extract-calendar-day date)) + (year (extract-calendar-year date)) + (jan-first (list 1 1 year))) + (if (and (= day 1) (= 1 month)) + (calendar-backward-month (* 12 arg)) + (if (and (= arg 1) + (calendar-date-is-visible-p jan-first)) + (calendar-cursor-to-visible-date jan-first) + (calendar-other-month 1 (- year (1- arg))))))) + +(defun calendar-end-of-year (arg) + "Move the cursor forward ARG year beginnings." + (interactive "p") + (calendar-cursor-to-nearest-date) + (let* ((date (calendar-cursor-to-date)) + (month (extract-calendar-month date)) + (day (extract-calendar-day date)) + (year (extract-calendar-year date)) + (dec-31 (list 12 31 year))) + (if (and (= day 31) (= 12 month)) + (calendar-forward-month (* 12 arg)) + (if (and (= arg 1) + (calendar-date-is-visible-p dec-31)) + (calendar-cursor-to-visible-date dec-31) + (calendar-other-month 12 (- year (1- arg))) + (calendar-cursor-to-visible-date (list 12 31 displayed-year)))))) + +(defun calendar-cursor-to-visible-date (date) + "Move the cursor to DATE that is on the screen." + (let* ((month (extract-calendar-month date)) + (day (extract-calendar-day date)) + (year (extract-calendar-year date)) + (first-of-month-weekday (calendar-day-of-week (list month 1 year)))) + (goto-line (+ 3 + (/ (+ day -1 + (mod + (- (calendar-day-of-week (list month 1 year)) + calendar-week-start-day) + 7)) + 7))) + (move-to-column (+ 6 + (* 25 + (1+ (calendar-interval + displayed-month displayed-year month year))) + (* 3 (mod + (- (calendar-day-of-week date) + calendar-week-start-day) + 7)))))) + +(defun calendar-goto-date (date) + "Move cursor to DATE." + (interactive (list (calendar-read-date))) + (let ((month (extract-calendar-month date)) + (year (extract-calendar-year date))) + (if (not (calendar-date-is-visible-p date)) + (calendar-other-month + (if (and (= month 1) (= year 1)) + 2 + month) + year))) + (calendar-cursor-to-visible-date date)) + +(provide 'cal-move) + +;;; cal-move.el ends here diff --git a/lisp/calendar/diary-lib.el b/lisp/calendar/diary-lib.el new file mode 100644 index 00000000000..73f8315d086 --- /dev/null +++ b/lisp/calendar/diary-lib.el @@ -0,0 +1,1373 @@ +;;; diary.el --- diary functions. + +;; Copyright (C) 1989, 1990, 1992, 1993, 1994, 1995 Free Software Foundation, +;; Inc. + +;; Author: Edward M. Reingold +;; Keywords: calendar + +;; This file is part of GNU Emacs. + +;; GNU Emacs is free software; you can redistribute it and/or modify +;; it under the terms of the GNU General Public License as published by +;; the Free Software Foundation; either version 2, or (at your option) +;; any later version. + +;; GNU Emacs is distributed in the hope that it will be useful, +;; but WITHOUT ANY WARRANTY; without even the implied warranty of +;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;; GNU General Public License for more details. + +;; You should have received a copy of the GNU General Public License +;; along with GNU Emacs; see the file COPYING. If not, write to +;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + +;;; Commentary: + +;; This collection of functions implements the diary features as described +;; in calendar.el. + +;; Comments, corrections, and improvements should be sent to +;; Edward M. Reingold Department of Computer Science +;; (217) 333-6733 University of Illinois at Urbana-Champaign +;; reingold@cs.uiuc.edu 1304 West Springfield Avenue +;; Urbana, Illinois 61801 + +;;; Code: + +(require 'calendar) + +;;;###autoload +(defun diary (&optional arg) + "Generate the diary window for ARG days starting with the current date. +If no argument is provided, the number of days of diary entries is governed +by the variable `number-of-diary-entries'. This function is suitable for +execution in a `.emacs' file." + (interactive "P") + (let ((d-file (substitute-in-file-name diary-file)) + (date (calendar-current-date))) + (if (and d-file (file-exists-p d-file)) + (if (file-readable-p d-file) + (list-diary-entries + date + (cond + (arg (prefix-numeric-value arg)) + ((vectorp number-of-diary-entries) + (aref number-of-diary-entries (calendar-day-of-week date))) + (t number-of-diary-entries))) + (error "Your diary file is not readable!")) + (error "You don't have a diary file!")))) + +(defun view-diary-entries (arg) + "Prepare and display a buffer with diary entries. +Searches the file named in `diary-file' for entries that +match ARG days starting with the date indicated by the cursor position +in the displayed three-month calendar." + (interactive "p") + (let ((d-file (substitute-in-file-name diary-file))) + (if (and d-file (file-exists-p d-file)) + (if (file-readable-p d-file) + (list-diary-entries (calendar-cursor-to-date t) arg) + (error "Diary file is not readable!")) + (error "You don't have a diary file!")))) + +(defun view-other-diary-entries (arg diary-file) + "Prepare and display buffer of diary entries from an alternative diary file. +Prompts for a file name and searches that file for entries that match ARG +days starting with the date indicated by the cursor position in the displayed +three-month calendar." + (interactive + (list (cond ((null current-prefix-arg) 1) + ((listp current-prefix-arg) (car current-prefix-arg)) + (t current-prefix-arg)) + (setq diary-file (read-file-name "Enter diary file name: " + default-directory nil t)))) + (view-diary-entries arg)) + +(autoload 'check-calendar-holidays "holidays" + "Check the list of holidays for any that occur on DATE. +The value returned is a list of strings of relevant holiday descriptions. +The holidays are those in the list `calendar-holidays'." + t) + +(autoload 'calendar-holiday-list "holidays" + "Form the list of holidays that occur on dates in the calendar window. +The holidays are those in the list `calendar-holidays'." + t) + +(autoload 'diary-french-date "cal-french" + "French calendar equivalent of date diary entry." + t) + +(autoload 'diary-mayan-date "cal-mayan" + "Mayan calendar equivalent of date diary entry." + t) + +(autoload 'diary-julian-date "cal-julian" + "Julian calendar equivalent of date diary entry." + t) + +(autoload 'diary-astro-day-number "cal-julian" + "Astronomical (Julian) day number diary entry." + t) + +(autoload 'diary-chinese-date "cal-chinese" + "Chinese calendar equivalent of date diary entry." + t) + +(autoload 'diary-islamic-date "cal-islamic" + "Islamic calendar equivalent of date diary entry." + t) + +(autoload 'list-islamic-diary-entries "cal-islamic" + "Add any Islamic date entries from the diary file to `diary-entries-list'." + t) + +(autoload 'mark-islamic-diary-entries "cal-islamic" + "Mark days in the calendar window that have Islamic date diary entries." + t) + +(autoload 'mark-islamic-calendar-date-pattern "cal-islamic" + "Mark dates in calendar window that conform to Islamic date MONTH/DAY/YEAR." + t) + +(autoload 'diary-hebrew-date "cal-hebrew" + "Hebrew calendar equivalent of date diary entry." + t) + +(autoload 'diary-omer "cal-hebrew" + "Omer count diary entry." + t) + +(autoload 'diary-yahrzeit "cal-hebrew" + "Yahrzeit diary entry--entry applies if date is yahrzeit or the day before." + t) + +(autoload 'diary-parasha "cal-hebrew" + "Parasha diary entry--entry applies if date is a Saturday." + t) + +(autoload 'diary-rosh-hodesh "cal-hebrew" + "Rosh Hodesh diary entry." + t) + +(autoload 'list-hebrew-diary-entries "cal-hebrew" + "Add any Hebrew date entries from the diary file to `diary-entries-list'." + t) + +(autoload 'mark-hebrew-diary-entries "cal-hebrew" + "Mark days in the calendar window that have Hebrew date diary entries." + t) + +(autoload 'mark-hebrew-calendar-date-pattern "cal-hebrew" + "Mark dates in calendar window that conform to Hebrew date MONTH/DAY/YEAR." + t) + +(autoload 'diary-coptic-date "cal-coptic" + "Coptic calendar equivalent of date diary entry." + t) + +(autoload 'diary-ethiopic-date "cal-coptic" + "Ethiopic calendar equivalent of date diary entry." + t) + +(autoload 'diary-phases-of-moon "lunar" "Moon phases diary entry." t) + +(autoload 'diary-sunrise-sunset "solar" + "Local time of sunrise and sunset as a diary entry." + t) + +(autoload 'diary-sabbath-candles "solar" + "Local time of candle lighting diary entry--applies if date is a Friday. +No diary entry if there is no sunset on that date." + t) + +(defvar diary-syntax-table (copy-syntax-table (standard-syntax-table)) + "The syntax table used when parsing dates in the diary file. +It is the standard syntax table used in Fundamental mode, but with the +syntax of `*' changed to be a word constituent.") + +(modify-syntax-entry ?* "w" diary-syntax-table) + +(defun list-diary-entries (date number) + "Create and display a buffer containing the relevant lines in diary-file. +The arguments are DATE and NUMBER; the entries selected are those +for NUMBER days starting with date DATE. The other entries are hidden +using selective display. + +Returns a list of all relevant diary entries found, if any, in order by date. +The list entries have the form ((month day year) string). If the variable +`diary-list-include-blanks' is t, this list includes a dummy diary entry +\(consisting of the empty string) for a date with no diary entries. + +After the list is prepared, the hooks `nongregorian-diary-listing-hook', +`list-diary-entries-hook', `diary-display-hook', and `diary-hook' are run. +These hooks have the following distinct roles: + + `nongregorian-diary-listing-hook' can cull dates from the diary + and each included file. Usually used for Hebrew or Islamic + diary entries in files. Applied to *each* file. + + `list-diary-entries-hook' adds or manipulates diary entries from + external sources. Used, for example, to include diary entries + from other files or to sort the diary entries. Invoked *once* only, + before the display hook is run. + + `diary-display-hook' does the actual display of information. If this is + nil, simple-diary-display will be used. Use add-hook to set this to + fancy-diary-display, if desired. If you want no diary display, use + add-hook to set this to ignore. + + `diary-hook' is run last. This can be used for an appointment + notification function." + + (if (< 0 number) + (let* ((original-date date);; save for possible use in the hooks + (old-diary-syntax-table) + (diary-entries-list) + (date-string (calendar-date-string date)) + (d-file (substitute-in-file-name diary-file))) + (message "Preparing diary...") + (save-excursion + (let ((diary-buffer (get-file-buffer d-file))) + (set-buffer (if diary-buffer + diary-buffer + (find-file-noselect d-file t)))) + (setq selective-display t) + (setq selective-display-ellipses nil) + (setq old-diary-syntax-table (syntax-table)) + (set-syntax-table diary-syntax-table) + (unwind-protect + (let ((buffer-read-only nil) + (diary-modified (buffer-modified-p)) + (mark (regexp-quote diary-nonmarking-symbol))) + (goto-char (1- (point-max))) + (if (not (looking-at "\^M\\|\n")) + (progn + (forward-char 1) + (insert-string "\^M"))) + (goto-char (point-min)) + (if (not (looking-at "\^M\\|\n")) + (insert-string "\^M")) + (subst-char-in-region (point-min) (point-max) ?\n ?\^M t) + (calendar-for-loop i from 1 to number do + (let ((d diary-date-forms) + (month (extract-calendar-month date)) + (day (extract-calendar-day date)) + (year (extract-calendar-year date)) + (entry-found (list-sexp-diary-entries date))) + (while d + (let* + ((date-form (if (equal (car (car d)) 'backup) + (cdr (car d)) + (car d))) + (backup (equal (car (car d)) 'backup)) + (dayname + (concat + (calendar-day-name date) "\\|" + (substring (calendar-day-name date) 0 3) ".?")) + (monthname + (concat + "\\*\\|" + (calendar-month-name month) "\\|" + (substring (calendar-month-name month) 0 3) ".?")) + (month (concat "\\*\\|0*" (int-to-string month))) + (day (concat "\\*\\|0*" (int-to-string day))) + (year + (concat + "\\*\\|0*" (int-to-string year) + (if abbreviated-calendar-year + (concat "\\|" (int-to-string (% year 100))) + ""))) + (regexp + (concat + "\\(\\`\\|\^M\\|\n\\)" mark "?\\(" + (mapconcat 'eval date-form "\\)\\(") + "\\)")) + (case-fold-search t)) + (goto-char (point-min)) + (while (re-search-forward regexp nil t) + (if backup (re-search-backward "\\<" nil t)) + (if (and (or (char-equal (preceding-char) ?\^M) + (char-equal (preceding-char) ?\n)) + (not (looking-at " \\|\^I"))) + ;; Diary entry that consists only of date. + (backward-char 1) + ;; Found a nonempty diary entry--make it visible and + ;; add it to the list. + (setq entry-found t) + (let ((entry-start (point)) + (date-start)) + (re-search-backward "\^M\\|\n\\|\\`") + (setq date-start (point)) + (re-search-forward "\^M\\|\n" nil t 2) + (while (looking-at " \\|\^I") + (re-search-forward "\^M\\|\n" nil t)) + (backward-char 1) + (subst-char-in-region date-start + (point) ?\^M ?\n t) + (add-to-diary-list + date (buffer-substring entry-start (point))))))) + (setq d (cdr d))) + (or entry-found + (not diary-list-include-blanks) + (setq diary-entries-list + (append diary-entries-list + (list (list date ""))))) + (setq date + (calendar-gregorian-from-absolute + (1+ (calendar-absolute-from-gregorian date)))) + (setq entry-found nil))) + (set-buffer-modified-p diary-modified)) + (set-syntax-table old-diary-syntax-table)) + (goto-char (point-min)) + (run-hooks 'nongregorian-diary-listing-hook + 'list-diary-entries-hook) + (if diary-display-hook + (run-hooks 'diary-display-hook) + (simple-diary-display)) + (run-hooks 'diary-hook) + diary-entries-list)))) + +(defun include-other-diary-files () + "Include the diary entries from other diary files with those of diary-file. +This function is suitable for use in `list-diary-entries-hook'; +it enables you to use shared diary files together with your own. +The files included are specified in the diaryfile by lines of this form: + #include \"filename\" +This is recursive; that is, #include directives in diary files thus included +are obeyed. You can change the `#include' to some other string by +changing the variable `diary-include-string'." + (goto-char (point-min)) + (while (re-search-forward + (concat + "\\(\\`\\|\^M\\|\n\\)" + (regexp-quote diary-include-string) + " \"\\([^\"]*\\)\"") + nil t) + (let ((diary-file (substitute-in-file-name + (buffer-substring (match-beginning 2) (match-end 2)))) + (diary-list-include-blanks nil) + (list-diary-entries-hook 'include-other-diary-files) + (diary-display-hook 'ignore) + (diary-hook nil)) + (if (file-exists-p diary-file) + (if (file-readable-p diary-file) + (unwind-protect + (setq diary-entries-list + (append diary-entries-list + (list-diary-entries original-date number))) + (kill-buffer (get-file-buffer diary-file))) + (beep) + (message "Can't read included diary file %s" diary-file) + (sleep-for 2)) + (beep) + (message "Can't find included diary file %s" diary-file) + (sleep-for 2)))) + (goto-char (point-min))) + +(defun simple-diary-display () + "Display the diary buffer if there are any relevant entries or holidays." + (let* ((holiday-list (if holidays-in-diary-buffer + (check-calendar-holidays original-date))) + (msg (format "No diary entries for %s %s" + (concat date-string (if holiday-list ":" "")) + (mapconcat 'identity holiday-list "; ")))) + (if (or (not diary-entries-list) + (and (not (cdr diary-entries-list)) + (string-equal (car (cdr (car diary-entries-list))) ""))) + (if (<= (length msg) (frame-width)) + (message msg) + (set-buffer (get-buffer-create holiday-buffer)) + (setq buffer-read-only nil) + (calendar-set-mode-line date-string) + (erase-buffer) + (insert (mapconcat 'identity holiday-list "\n")) + (goto-char (point-min)) + (set-buffer-modified-p nil) + (setq buffer-read-only t) + (display-buffer holiday-buffer) + (message "No diary entries for %s" date-string)) + (calendar-set-mode-line + (concat "Diary for " date-string + (if holiday-list ": " "") + (mapconcat 'identity holiday-list "; "))) + (display-buffer (get-file-buffer d-file)) + (message "Preparing diary...done")))) + +(defun fancy-diary-display () + "Prepare a diary buffer with relevant entries in a fancy, noneditable form. +This function is provided for optional use as the `diary-display-hook'." + (save-excursion;; Turn off selective-display in the diary file's buffer. + (set-buffer (get-file-buffer (substitute-in-file-name diary-file))) + (let ((diary-modified (buffer-modified-p))) + (subst-char-in-region (point-min) (point-max) ?\^M ?\n t) + (setq selective-display nil) + (kill-local-variable 'mode-line-format) + (set-buffer-modified-p diary-modified))) + (if (or (not diary-entries-list) + (and (not (cdr diary-entries-list)) + (string-equal (car (cdr (car diary-entries-list))) ""))) + (let* ((holiday-list (if holidays-in-diary-buffer + (check-calendar-holidays original-date))) + (msg (format "No diary entries for %s %s" + (concat date-string (if holiday-list ":" "")) + (mapconcat 'identity holiday-list "; ")))) + (if (<= (length msg) (frame-width)) + (message msg) + (set-buffer (get-buffer-create holiday-buffer)) + (setq buffer-read-only nil) + (calendar-set-mode-line date-string) + (erase-buffer) + (insert (mapconcat 'identity holiday-list "\n")) + (goto-char (point-min)) + (set-buffer-modified-p nil) + (setq buffer-read-only t) + (display-buffer holiday-buffer) + (message "No diary entries for %s" date-string))) + (save-excursion;; Prepare the fancy diary buffer. + (set-buffer (make-fancy-diary-buffer)) + (setq buffer-read-only nil) + (let ((entry-list diary-entries-list) + (holiday-list) + (holiday-list-last-month 1) + (holiday-list-last-year 1) + (date (list 0 0 0))) + (while entry-list + (if (not (calendar-date-equal date (car (car entry-list)))) + (progn + (setq date (car (car entry-list))) + (and holidays-in-diary-buffer + (calendar-date-compare + (list (list holiday-list-last-month + (calendar-last-day-of-month + holiday-list-last-month + holiday-list-last-year) + holiday-list-last-year)) + (list date)) + ;; We need to get the holidays for the next 3 months. + (setq holiday-list-last-month + (extract-calendar-month date)) + (setq holiday-list-last-year + (extract-calendar-year date)) + (increment-calendar-month + holiday-list-last-month holiday-list-last-year 1) + (setq holiday-list + (let ((displayed-month holiday-list-last-month) + (displayed-year holiday-list-last-year)) + (calendar-holiday-list))) + (increment-calendar-month + holiday-list-last-month holiday-list-last-year 1)) + (let* ((date-string (calendar-date-string date)) + (date-holiday-list + (let ((h holiday-list) + (d)) + ;; Make a list of all holidays for date. + (while h + (if (calendar-date-equal date (car (car h))) + (setq d (append d (cdr (car h))))) + (setq h (cdr h))) + d))) + (insert (if (= (point) (point-min)) "" ?\n) date-string) + (if date-holiday-list (insert ": ")) + (let ((l (current-column))) + (insert (mapconcat 'identity date-holiday-list + (concat "\n" (make-string l ? ))))) + (let ((l (current-column))) + (insert ?\n (make-string l ?=) ?\n))))) + (if (< 0 (length (car (cdr (car entry-list))))) + (insert (car (cdr (car entry-list))) ?\n)) + (setq entry-list (cdr entry-list)))) + (set-buffer-modified-p nil) + (goto-char (point-min)) + (setq buffer-read-only t) + (display-buffer fancy-diary-buffer) + (message "Preparing diary...done")))) + +(defun make-fancy-diary-buffer () + "Create and return the initial fancy diary buffer." + (save-excursion + (set-buffer (get-buffer-create fancy-diary-buffer)) + (setq buffer-read-only nil) + (make-local-variable 'mode-line-format) + (calendar-set-mode-line "Diary Entries") + (erase-buffer) + (set-buffer-modified-p nil) + (setq buffer-read-only t) + (get-buffer fancy-diary-buffer))) + +(defun print-diary-entries () + "Print a hard copy of the diary display. + +If the simple diary display is being used, prepare a temp buffer with the +visible lines of the diary buffer, add a heading line composed from the mode +line, print the temp buffer, and destroy it. + +If the fancy diary display is being used, just print the buffer. + +The hooks given by the variable `print-diary-entries-hook' are called to do +the actual printing." + (interactive) + (if (bufferp (get-buffer fancy-diary-buffer)) + (save-excursion + (set-buffer (get-buffer fancy-diary-buffer)) + (run-hooks 'print-diary-entries-hook)) + (let ((diary-buffer + (get-file-buffer (substitute-in-file-name diary-file)))) + (if diary-buffer + (let ((temp-buffer (get-buffer-create "*Printable Diary Entries*")) + (heading)) + (save-excursion + (set-buffer diary-buffer) + (setq heading + (if (not (stringp mode-line-format)) + "All Diary Entries" + (string-match "^-*\\([^-].*[^-]\\)-*$" mode-line-format) + (substring mode-line-format + (match-beginning 1) (match-end 1)))) + (copy-to-buffer temp-buffer (point-min) (point-max)) + (set-buffer temp-buffer) + (while (re-search-forward "\^M.*$" nil t) + (replace-match "")) + (goto-char (point-min)) + (insert heading "\n" + (make-string (length heading) ?=) "\n") + (run-hooks 'print-diary-entries-hook) + (kill-buffer temp-buffer))) + (error "You don't have a diary buffer!"))))) + +(defun show-all-diary-entries () + "Show all of the diary entries in the diary file. +This function gets rid of the selective display of the diary file so that +all entries, not just some, are visible. If there is no diary buffer, one +is created." + (interactive) + (let ((d-file (substitute-in-file-name diary-file))) + (if (and d-file (file-exists-p d-file)) + (if (file-readable-p d-file) + (save-excursion + (let ((diary-buffer (get-file-buffer d-file))) + (set-buffer (if diary-buffer + diary-buffer + (find-file-noselect d-file t))) + (let ((buffer-read-only nil) + (diary-modified (buffer-modified-p))) + (subst-char-in-region (point-min) (point-max) ?\^M ?\n t) + (setq selective-display nil) + (make-local-variable 'mode-line-format) + (setq mode-line-format default-mode-line-format) + (display-buffer (current-buffer)) + (set-buffer-modified-p diary-modified)))) + (error "Your diary file is not readable!")) + (error "You don't have a diary file!")))) + +(defun diary-name-pattern (string-array &optional fullname) + "Convert an STRING-ARRAY, an array of strings to a pattern. +The pattern will match any of the strings, either entirely or abbreviated +to three characters. An abbreviated form will match with or without a period; +If the optional FULLNAME is t, abbreviations will not match, just the full +name." + (let ((pattern "")) + (calendar-for-loop i from 0 to (1- (length string-array)) do + (setq pattern + (concat + pattern + (if (string-equal pattern "") "" "\\|") + (aref string-array i) + (if fullname + "" + (concat + "\\|" + (substring (aref string-array i) 0 3) ".?"))))) + pattern)) + +(defvar marking-diary-entries nil + "True during the marking of diary entries, nil otherwise.") + +(defvar marking-diary-entry nil + "True during the marking of diary entries, if current entry is marking.") + +(defun mark-diary-entries () + "Mark days in the calendar window that have diary entries. +Each entry in the diary file visible in the calendar window is marked. +After the entries are marked, the hooks `nongregorian-diary-marking-hook' and +`mark-diary-entries-hook' are run." + (interactive) + (setq mark-diary-entries-in-calendar t) + (let ((d-file (substitute-in-file-name diary-file)) + (marking-diary-entries t)) + (if (and d-file (file-exists-p d-file)) + (if (file-readable-p d-file) + (save-excursion + (message "Marking diary entries...") + (set-buffer (find-file-noselect d-file t)) + (let ((d diary-date-forms) + (old-diary-syntax-table)) + (setq old-diary-syntax-table (syntax-table)) + (set-syntax-table diary-syntax-table) + (while d + (let* + ((date-form (if (equal (car (car d)) 'backup) + (cdr (car d)) + (car d)));; ignore 'backup directive + (dayname (diary-name-pattern calendar-day-name-array)) + (monthname + (concat + (diary-name-pattern calendar-month-name-array) + "\\|\\*")) + (month "[0-9]+\\|\\*") + (day "[0-9]+\\|\\*") + (year "[0-9]+\\|\\*") + (l (length date-form)) + (d-name-pos (- l (length (memq 'dayname date-form)))) + (d-name-pos (if (/= l d-name-pos) (+ 2 d-name-pos))) + (m-name-pos (- l (length (memq 'monthname date-form)))) + (m-name-pos (if (/= l m-name-pos) (+ 2 m-name-pos))) + (d-pos (- l (length (memq 'day date-form)))) + (d-pos (if (/= l d-pos) (+ 2 d-pos))) + (m-pos (- l (length (memq 'month date-form)))) + (m-pos (if (/= l m-pos) (+ 2 m-pos))) + (y-pos (- l (length (memq 'year date-form)))) + (y-pos (if (/= l y-pos) (+ 2 y-pos))) + (regexp + (concat + "\\(\\`\\|\^M\\|\n\\)\\(" + (mapconcat 'eval date-form "\\)\\(") + "\\)")) + (case-fold-search t)) + (goto-char (point-min)) + (while (re-search-forward regexp nil t) + (let* ((dd-name + (if d-name-pos + (buffer-substring + (match-beginning d-name-pos) + (match-end d-name-pos)))) + (mm-name + (if m-name-pos + (buffer-substring + (match-beginning m-name-pos) + (match-end m-name-pos)))) + (mm (string-to-int + (if m-pos + (buffer-substring + (match-beginning m-pos) + (match-end m-pos)) + ""))) + (dd (string-to-int + (if d-pos + (buffer-substring + (match-beginning d-pos) + (match-end d-pos)) + ""))) + (y-str (if y-pos + (buffer-substring + (match-beginning y-pos) + (match-end y-pos)))) + (yy (if (not y-str) + 0 + (if (and (= (length y-str) 2) + abbreviated-calendar-year) + (let* ((current-y + (extract-calendar-year + (calendar-current-date))) + (y (+ (string-to-int y-str) + (* 100 + (/ current-y 100))))) + (if (> (- y current-y) 50) + (- y 100) + (if (> (- current-y y) 50) + (+ y 100) + y))) + (string-to-int y-str))))) + (if dd-name + (mark-calendar-days-named + (cdr (assoc (capitalize (substring dd-name 0 3)) + (calendar-make-alist + calendar-day-name-array + 0 + '(lambda (x) (substring x 0 3)))))) + (if mm-name + (if (string-equal mm-name "*") + (setq mm 0) + (setq mm + (cdr (assoc + (capitalize + (substring mm-name 0 3)) + (calendar-make-alist + calendar-month-name-array + 1 + '(lambda (x) (substring x 0 3))) + ))))) + (mark-calendar-date-pattern mm dd yy)))) + (setq d (cdr d)))) + (mark-sexp-diary-entries) + (run-hooks 'nongregorian-diary-marking-hook + 'mark-diary-entries-hook) + (set-syntax-table old-diary-syntax-table) + (message "Marking diary entries...done"))) + (error "Your diary file is not readable!")) + (error "You don't have a diary file!")))) + +(defun mark-sexp-diary-entries () + "Mark days in the calendar window that have sexp diary entries. +Each entry in the diary file (or included files) visible in the calendar window +is marked. See the documentation for the function `list-sexp-diary-entries'." + (let* ((sexp-mark (regexp-quote sexp-diary-entry-symbol)) + (s-entry (concat "\\(\\`\\|\^M\\|\n\\)\\(" + (regexp-quote sexp-mark) "(\\)\\|\\(" + (regexp-quote diary-nonmarking-symbol) + (regexp-quote sexp-mark) "(diary-remind\\)")) + (m) + (y) + (first-date) + (last-date)) + (save-excursion + (set-buffer calendar-buffer) + (setq m displayed-month) + (setq y displayed-year)) + (increment-calendar-month m y -1) + (setq first-date + (calendar-absolute-from-gregorian (list m 1 y))) + (increment-calendar-month m y 2) + (setq last-date + (calendar-absolute-from-gregorian + (list m (calendar-last-day-of-month m y) y))) + (goto-char (point-min)) + (while (re-search-forward s-entry nil t) + (if (char-equal (preceding-char) ?() + (setq marking-diary-entry t) + (setq marking-diary-entry nil)) + (re-search-backward "(") + (let ((sexp-start (point)) + (sexp) + (entry) + (entry-start) + (line-start)) + (forward-sexp) + (setq sexp (buffer-substring sexp-start (point))) + (save-excursion + (re-search-backward "\^M\\|\n\\|\\`") + (setq line-start (point))) + (forward-char 1) + (if (and (or (char-equal (preceding-char) ?\^M) + (char-equal (preceding-char) ?\n)) + (not (looking-at " \\|\^I"))) + (progn;; Diary entry consists only of the sexp + (backward-char 1) + (setq entry "")) + (setq entry-start (point)) + (re-search-forward "\^M\\|\n" nil t) + (while (looking-at " \\|\^I") + (re-search-forward "\^M\\|\n" nil t)) + (backward-char 1) + (setq entry (buffer-substring entry-start (point))) + (while (string-match "[\^M]" entry) + (aset entry (match-beginning 0) ?\n ))) + (calendar-for-loop date from first-date to last-date do + (if (diary-sexp-entry sexp entry + (calendar-gregorian-from-absolute date)) + (mark-visible-calendar-date + (calendar-gregorian-from-absolute date)))))))) + +(defun mark-included-diary-files () + "Mark the diary entries from other diary files with those of the diary file. +This function is suitable for use as the `mark-diary-entries-hook'; it enables +you to use shared diary files together with your own. The files included are +specified in the diary-file by lines of this form: + #include \"filename\" +This is recursive; that is, #include directives in diary files thus included +are obeyed. You can change the `#include' to some other string by +changing the variable `diary-include-string'." + (goto-char (point-min)) + (while (re-search-forward + (concat + "\\(\\`\\|\^M\\|\n\\)" + (regexp-quote diary-include-string) + " \"\\([^\"]*\\)\"") + nil t) + (let ((diary-file (substitute-in-file-name + (buffer-substring (match-beginning 2) (match-end 2)))) + (mark-diary-entries-hook 'mark-included-diary-files)) + (if (file-exists-p diary-file) + (if (file-readable-p diary-file) + (progn + (mark-diary-entries) + (kill-buffer (get-file-buffer diary-file))) + (beep) + (message "Can't read included diary file %s" diary-file) + (sleep-for 2)) + (beep) + (message "Can't find included diary file %s" diary-file) + (sleep-for 2)))) + (goto-char (point-min))) + +(defun mark-calendar-days-named (dayname) + "Mark all dates in the calendar window that are day DAYNAME of the week. +0 means all Sundays, 1 means all Mondays, and so on." + (save-excursion + (set-buffer calendar-buffer) + (let ((prev-month displayed-month) + (prev-year displayed-year) + (succ-month displayed-month) + (succ-year displayed-year) + (last-day) + (day)) + (increment-calendar-month succ-month succ-year 1) + (increment-calendar-month prev-month prev-year -1) + (setq day (calendar-absolute-from-gregorian + (calendar-nth-named-day 1 dayname prev-month prev-year))) + (setq last-day (calendar-absolute-from-gregorian + (calendar-nth-named-day -1 dayname succ-month succ-year))) + (while (<= day last-day) + (mark-visible-calendar-date (calendar-gregorian-from-absolute day)) + (setq day (+ day 7)))))) + +(defun mark-calendar-date-pattern (month day year) + "Mark all dates in the calendar window that conform to MONTH/DAY/YEAR. +A value of 0 in any position is a wildcard." + (save-excursion + (set-buffer calendar-buffer) + (let ((m displayed-month) + (y displayed-year)) + (increment-calendar-month m y -1) + (calendar-for-loop i from 0 to 2 do + (mark-calendar-month m y month day year) + (increment-calendar-month m y 1))))) + +(defun mark-calendar-month (month year p-month p-day p-year) + "Mark dates in the MONTH/YEAR that conform to pattern P-MONTH/P_DAY/P-YEAR. +A value of 0 in any position of the pattern is a wildcard." + (if (or (and (= month p-month) + (or (= p-year 0) (= year p-year))) + (and (= p-month 0) + (or (= p-year 0) (= year p-year)))) + (if (= p-day 0) + (calendar-for-loop + i from 1 to (calendar-last-day-of-month month year) do + (mark-visible-calendar-date (list month i year))) + (mark-visible-calendar-date (list month p-day year))))) + +(defun sort-diary-entries () + "Sort the list of diary entries by time of day." + (setq diary-entries-list (sort diary-entries-list 'diary-entry-compare))) + +(defun diary-entry-compare (e1 e2) + "Returns t if E1 is earlier than E2." + (or (calendar-date-compare e1 e2) + (and (calendar-date-equal (car e1) (car e2)) + (< (diary-entry-time (car (cdr e1))) + (diary-entry-time (car (cdr e2))))))) + +(defun diary-entry-time (s) + "Time at the beginning of the string S in a military-style integer. +For example, returns 1325 for 1:25pm. Returns -9999 if no time is recognized. +The recognized forms are XXXX or X:XX or XX:XX (military time), XXam or XXpm, +and XX:XXam or XX:XXpm." + (cond ((string-match;; Military time + "^[ \t]*\\([0-9]?[0-9]\\):?\\([0-9][0-9]\\)\\(\\>\\|[^ap]\\)" s) + (+ (* 100 (string-to-int + (substring s (match-beginning 1) (match-end 1)))) + (string-to-int (substring s (match-beginning 2) (match-end 2))))) + ((string-match;; Hour only XXam or XXpm + "^[ \t]*\\([0-9]?[0-9]\\)\\([ap]\\)m\\>" s) + (+ (* 100 (% (string-to-int + (substring s (match-beginning 1) (match-end 1))) + 12)) + (if (string-equal "a" + (substring s (match-beginning 2) (match-end 2))) + 0 1200))) + ((string-match;; Hour and minute XX:XXam or XX:XXpm + "^[ \t]*\\([0-9]?[0-9]\\):\\([0-9][0-9]\\)\\([ap]\\)m\\>" s) + (+ (* 100 (% (string-to-int + (substring s (match-beginning 1) (match-end 1))) + 12)) + (string-to-int (substring s (match-beginning 2) (match-end 2))) + (if (string-equal "a" + (substring s (match-beginning 3) (match-end 3))) + 0 1200))) + (t -9999)));; Unrecognizable + +(defun list-sexp-diary-entries (date) + "Add sexp entries for DATE from the diary file to `diary-entries-list'. +Also, Make them visible in the diary file. Returns t if any entries were +found. + +Sexp diary entries must be prefaced by a `sexp-diary-entry-symbol' (normally +`%%'). The form of a sexp diary entry is + + %%(SEXP) ENTRY + +Both ENTRY and DATE are globally available when the SEXP is evaluated. If the +SEXP yields the value nil, the diary entry does not apply. If it yields a +non-nil value, ENTRY will be taken to apply to DATE; if the non-nil value is a +string, that string will be the diary entry in the fancy diary display. + +For example, the following diary entry will apply to the 21st of the month +if it is a weekday and the Friday before if the 21st is on a weekend: + + &%%(let ((dayname (calendar-day-of-week date)) + (day (extract-calendar-day date))) + (or + (and (= day 21) (memq dayname '(1 2 3 4 5))) + (and (memq day '(19 20)) (= dayname 5))) + ) UIUC pay checks deposited + +A number of built-in functions are available for this type of diary entry: + + %%(diary-date MONTH DAY YEAR) text + Entry applies if date is MONTH, DAY, YEAR if + `european-calendar-style' is nil, and DAY, MONTH, YEAR if + `european-calendar-style' is t. DAY, MONTH, and YEAR + can be lists of integers, the constant t, or an integer. + The constant t means all values. + + %%(diary-float MONTH DAYNAME N) text + Entry will appear on the Nth DAYNAME of MONTH. + (DAYNAME=0 means Sunday, 1 means Monday, and so on; + if N is negative it counts backward from the end of + the month. MONTH can be a list of months, a single + month, or t to specify all months. + + %%(diary-block M1 D1 Y1 M2 D2 Y2) text + Entry will appear on dates between M1/D1/Y1 and M2/D2/Y2, + inclusive. (If `european-calendar-style' is t, the + order of the parameters should be changed to D1, M1, Y1, + D2, M2, Y2.) + + %%(diary-anniversary MONTH DAY YEAR) text + Entry will appear on anniversary dates of MONTH DAY, YEAR. + (If `european-calendar-style' is t, the order of the + parameters should be changed to DAY, MONTH, YEAR.) Text + can contain %d or %d%s; %d will be replaced by the number + of years since the MONTH DAY, YEAR and %s will be replaced + by the ordinal ending of that number (that is, `st', `nd', + `rd' or `th', as appropriate. The anniversary of February + 29 is considered to be March 1 in a non-leap year. + + %%(diary-cyclic N MONTH DAY YEAR) text + Entry will appear every N days, starting MONTH DAY, YEAR. + (If `european-calendar-style' is t, the order of the + parameters should be changed to N, DAY, MONTH, YEAR.) Text + can contain %d or %d%s; %d will be replaced by the number + of repetitions since the MONTH DAY, YEAR and %s will + be replaced by the ordinal ending of that number (that is, + `st', `nd', `rd' or `th', as appropriate. + + %%(diary-remind SEXP DAYS &optional MARKING) text + Entry is a reminder for diary sexp SEXP. DAYS is either a + single number or a list of numbers indicating the number(s) + of days before the event that the warning(s) should occur. + If the current date is (one of) DAYS before the event + indicated by EXPR, then a suitable message (as specified + by `diary-remind-message') appears. In addition to the + reminders beforehand, the diary entry also appears on + the date itself. If optional MARKING is non-nil then the + *reminders* are marked on the calendar. Marking of + reminders is independent of whether the entry *itself* is + a marking or nonmarking one. + + %%(diary-day-of-year) + Diary entries giving the day of the year and the number of + days remaining in the year will be made every day. Note + that since there is no text, it makes sense only if the + fancy diary display is used. + + %%(diary-iso-date) + Diary entries giving the corresponding ISO commercial date + will be made every day. Note that since there is no text, + it makes sense only if the fancy diary display is used. + + %%(diary-french-date) + Diary entries giving the corresponding French Revolutionary + date will be made every day. Note that since there is no + text, it makes sense only if the fancy diary display is used. + + %%(diary-islamic-date) + Diary entries giving the corresponding Islamic date will be + made every day. Note that since there is no text, it + makes sense only if the fancy diary display is used. + + %%(diary-hebrew-date) + Diary entries giving the corresponding Hebrew date will be + made every day. Note that since there is no text, it + makes sense only if the fancy diary display is used. + + %%(diary-astro-day-number) Diary entries giving the corresponding + astronomical (Julian) day number will be made every day. + Note that since there is no text, it makes sense only if the + fancy diary display is used. + + %%(diary-julian-date) Diary entries giving the corresponding + Julian date will be made every day. Note that since + there is no text, it makes sense only if the fancy diary + display is used. + + %%(diary-sunrise-sunset) + Diary entries giving the local times of sunrise and sunset + will be made every day. Note that since there is no text, + it makes sense only if the fancy diary display is used. + Floating point required. + + %%(diary-phases-of-moon) + Diary entries giving the times of the phases of the moon + will be when appropriate. Note that since there is no text, + it makes sense only if the fancy diary display is used. + Floating point required. + + %%(diary-yahrzeit MONTH DAY YEAR) text + Text is assumed to be the name of the person; the date is + the date of death on the *civil* calendar. The diary entry + will appear on the proper Hebrew-date anniversary and on the + day before. (If `european-calendar-style' is t, the order + of the parameters should be changed to DAY, MONTH, YEAR.) + + %%(diary-rosh-hodesh) + Diary entries will be made on the dates of Rosh Hodesh on + the Hebrew calendar. Note that since there is no text, it + makes sense only if the fancy diary display is used. + + %%(diary-parasha) + Diary entries giving the weekly parasha will be made on + every Saturday. Note that since there is no text, it + makes sense only if the fancy diary display is used. + + %%(diary-omer) + Diary entries giving the omer count will be made every day + from Passover to Shavuoth. Note that since there is no text, + it makes sense only if the fancy diary display is used. + +Marking these entries is *extremely* time consuming, so these entries are +best if they are nonmarking." + (let* ((mark (regexp-quote diary-nonmarking-symbol)) + (sexp-mark (regexp-quote sexp-diary-entry-symbol)) + (s-entry (concat "\\(\\`\\|\^M\\|\n\\)" mark "?" sexp-mark "(")) + (entry-found)) + (goto-char (point-min)) + (while (re-search-forward s-entry nil t) + (backward-char 1) + (let ((sexp-start (point)) + (sexp) + (entry) + (entry-start) + (line-start)) + (forward-sexp) + (setq sexp (buffer-substring sexp-start (point))) + (save-excursion + (re-search-backward "\^M\\|\n\\|\\`") + (setq line-start (point))) + (forward-char 1) + (if (and (or (char-equal (preceding-char) ?\^M) + (char-equal (preceding-char) ?\n)) + (not (looking-at " \\|\^I"))) + (progn;; Diary entry consists only of the sexp + (backward-char 1) + (setq entry "")) + (setq entry-start (point)) + (re-search-forward "\^M\\|\n" nil t) + (while (looking-at " \\|\^I") + (re-search-forward "\^M\\|\n" nil t)) + (backward-char 1) + (setq entry (buffer-substring entry-start (point))) + (while (string-match "[\^M]" entry) + (aset entry (match-beginning 0) ?\n ))) + (let ((diary-entry (diary-sexp-entry sexp entry date))) + (if diary-entry + (subst-char-in-region line-start (point) ?\^M ?\n t)) + (add-to-diary-list date diary-entry) + (setq entry-found (or entry-found diary-entry))))) + entry-found)) + +(defun diary-sexp-entry (sexp entry date) + "Process a SEXP diary ENTRY for DATE." + (let ((result (if calendar-debug-sexp + (let ((stack-trace-on-error t)) + (eval (car (read-from-string sexp)))) + (condition-case nil + (eval (car (read-from-string sexp))) + (error + (beep) + (message "Bad sexp at line %d in %s: %s" + (save-excursion + (save-restriction + (narrow-to-region 1 (point)) + (goto-char (point-min)) + (let ((lines 1)) + (while (re-search-forward "\n\\|\^M" nil t) + (setq lines (1+ lines))) + lines))) + diary-file sexp) + (sleep-for 2)))))) + (if (stringp result) + result + (if result + entry + nil)))) + +(defun diary-date (month day year) + "Specific date(s) diary entry. +Entry applies if date is MONTH, DAY, YEAR if `european-calendar-style' is nil, +and DAY, MONTH, YEAR if `european-calendar-style' is t. DAY, MONTH, and YEAR +can be lists of integers, the constant t, or an integer. The constant t means +all values." + (let* ((dd (if european-calendar-style + month + day)) + (mm (if european-calendar-style + day + month)) + (m (extract-calendar-month date)) + (y (extract-calendar-year date)) + (d (extract-calendar-day date))) + (if (and + (or (and (listp dd) (memq d dd)) + (equal d dd) + (eq dd t)) + (or (and (listp mm) (memq m mm)) + (equal m mm) + (eq mm t)) + (or (and (listp year) (memq y year)) + (equal y year) + (eq year t))) + entry))) + +(defun diary-block (m1 d1 y1 m2 d2 y2) + "Block diary entry. +Entry applies if date is between two dates. Order of the parameters is +M1, D1, Y1, M2, D2, Y2 `european-calendar-style' is nil, and +D1, M1, Y1, D2, M2, Y2 if `european-calendar-style' is t." + (let ((date1 (calendar-absolute-from-gregorian + (if european-calendar-style + (list d1 m1 y1) + (list m1 d1 y1)))) + (date2 (calendar-absolute-from-gregorian + (if european-calendar-style + (list d2 m2 y2) + (list m2 d2 y2)))) + (d (calendar-absolute-from-gregorian date))) + (if (and (<= date1 d) (<= d date2)) + entry))) + +(defun diary-float (month dayname n) + "Floating diary entry--entry applies if date is the nth dayname of month. +Parameters are MONTH, DAYNAME, N. MONTH can be a list of months, the constant +t, or an integer. The constant t means all months. If N is negative, count +backward from the end of the month." + (let ((m (extract-calendar-month date)) + (y (extract-calendar-year date))) + (if (and + (or (and (listp month) (memq m month)) + (equal m month) + (eq month t)) + (calendar-date-equal date (calendar-nth-named-day n dayname m y))) + entry))) + +(defun diary-anniversary (month day year) + "Anniversary diary entry. +Entry applies if date is the anniversary of MONTH, DAY, YEAR if +`european-calendar-style' is nil, and DAY, MONTH, YEAR if +`european-calendar-style' is t. Diary entry can contain `%d' or `%d%s'; the +%d will be replaced by the number of years since the MONTH DAY, YEAR and the +%s will be replaced by the ordinal ending of that number (that is, `st', `nd', +`rd' or `th', as appropriate. The anniversary of February 29 is considered +to be March 1 in non-leap years." + (let* ((d (if european-calendar-style + month + day)) + (m (if european-calendar-style + day + month)) + (y (extract-calendar-year date)) + (diff (- y year))) + (if (and (= m 2) (= d 29) (not (calendar-leap-year-p y))) + (setq m 3 + d 1)) + (if (and (> diff 0) (calendar-date-equal (list m d y) date)) + (format entry diff (diary-ordinal-suffix diff))))) + +(defun diary-cyclic (n month day year) + "Cycle diary entry--entry applies every N days starting at MONTH, DAY, YEAR. +If `european-calendar-style' is t, parameters are N, DAY, MONTH, YEAR. +ENTRY can contain `%d' or `%d%s'; the %d will be replaced by the number of +years since the MONTH DAY, YEAR and the %s will be replaced by the ordinal +ending of that number (that is, `st', `nd', `rd' or `th', as appropriate." + (let* ((d (if european-calendar-style + month + day)) + (m (if european-calendar-style + day + month)) + (diff (- (calendar-absolute-from-gregorian date) + (calendar-absolute-from-gregorian + (list m d year)))) + (cycle (/ diff n))) + (if (and (>= diff 0) (zerop (% diff n))) + (format entry cycle (diary-ordinal-suffix cycle))))) + +(defun diary-ordinal-suffix (n) + "Ordinal suffix for N. (That is, `st', `nd', `rd', or `th', as appropriate.)" + (if (or (memq (% n 100) '(11 12 13)) + (< 3 (% n 10))) + "th" + (aref ["th" "st" "nd" "rd"] (% n 10)))) + +(defun diary-day-of-year () + "Day of year and number of days remaining in the year of date diary entry." + (calendar-day-of-year-string date)) + +(defvar diary-remind-message + '("Reminder: Only " + (if (= 0 (% days 7)) + (concat (int-to-string (/ days 7)) (if (= 7 days) " week" " weeks")) + (concat (int-to-string days) (if (= 1 days) " day" " days"))) + " until " + diary-entry) + "*Pseudo-pattern giving form of reminder messages in the fancy diary +display. + +Used by the function `diary-remind', a pseudo-pattern is a list of +expressions that can involve the keywords `days' (a number), `date' (a list of +month, day, year), and `diary-entry' (a string).") + +(defun diary-remind (sexp days &optional marking) + "Provide a reminder of a diary entry. +SEXP is a diary-sexp. DAYS is either a single number or a list of numbers +indicating the number(s) of days before the event that the warning(s) should +occur on. If the current date is (one of) DAYS before the event indicated by +SEXP, then a suitable message (as specified by `diary-remind-message' is +returned. + +In addition to the reminders beforehand, the diary entry also appears on +the date itself. + +If optional parameter MARKING is non-nil then the reminders are marked on the +calendar. Marking of reminders is independent of whether the entry itself is +a marking or nonmarking one." + (let ((diary-entry)) + (if (or (not marking-diary-entries) marking) + (cond + ((integerp days) + (let ((date (calendar-gregorian-from-absolute + (+ (calendar-absolute-from-gregorian date) days)))) + (if (setq diary-entry (eval sexp)) + (setq diary-entry (mapconcat 'eval diary-remind-message ""))))) + ((and (listp days) days) + (setq diary-entry (diary-remind sexp (car days) marking)) + (if (not diary-entry) + (setq diary-entry (diary-remind sexp (cdr days) marking)))))) + (or diary-entry + (and (or (not marking-diary-entries) marking-diary-entry) + (eval sexp))))) + +(defun add-to-diary-list (date string) + "Add the entry (DATE STRING) to `diary-entries-list'. +Do nothing if DATE or STRING is nil." + (and date string + (setq diary-entries-list + (append diary-entries-list (list (list date string)))))) + +(defun make-diary-entry (string &optional nonmarking file) + "Insert a diary entry STRING which may be NONMARKING in FILE. +If omitted, NONMARKING defaults to nil and FILE defaults to diary-file." + (find-file-other-window + (substitute-in-file-name (if file file diary-file))) + (goto-char (point-max)) + (insert + (if (bolp) "" "\n") + (if nonmarking diary-nonmarking-symbol "") + string " ")) + +(defun insert-diary-entry (arg) + "Insert a diary entry for the date indicated by point. +Prefix arg will make the entry nonmarking." + (interactive "P") + (make-diary-entry (calendar-date-string (calendar-cursor-to-date t) t t) + arg)) + +(defun insert-weekly-diary-entry (arg) + "Insert a weekly diary entry for the day of the week indicated by point. +Prefix arg will make the entry nonmarking." + (interactive "P") + (make-diary-entry (calendar-day-name (calendar-cursor-to-date t)) + arg)) + +(defun insert-monthly-diary-entry (arg) + "Insert a monthly diary entry for the day of the month indicated by point. +Prefix arg will make the entry nonmarking." + (interactive "P") + (let* ((calendar-date-display-form + (if european-calendar-style + '(day " * ") + '("* " day)))) + (make-diary-entry (calendar-date-string (calendar-cursor-to-date t) t) + arg))) + +(defun insert-yearly-diary-entry (arg) + "Insert an annual diary entry for the day of the year indicated by point. +Prefix arg will make the entry nonmarking." + (interactive "P") + (let* ((calendar-date-display-form + (if european-calendar-style + '(day " " monthname) + '(monthname " " day)))) + (make-diary-entry (calendar-date-string (calendar-cursor-to-date t) t) + arg))) + +(defun insert-anniversary-diary-entry (arg) + "Insert an anniversary diary entry for the date given by point. +Prefix arg will make the entry nonmarking." + (interactive "P") + (let* ((calendar-date-display-form + (if european-calendar-style + '(day " " month " " year) + '(month " " day " " year)))) + (make-diary-entry + (format "%s(diary-anniversary %s)" + sexp-diary-entry-symbol + (calendar-date-string (calendar-cursor-to-date t) nil t)) + arg))) + +(defun insert-block-diary-entry (arg) + "Insert a block diary entry for the days between the point and marked date. +Prefix arg will make the entry nonmarking." + (interactive "P") + (let* ((calendar-date-display-form + (if european-calendar-style + '(day " " month " " year) + '(month " " day " " year))) + (cursor (calendar-cursor-to-date t)) + (mark (or (car calendar-mark-ring) + (error "No mark set in this buffer"))) + (start) + (end)) + (if (< (calendar-absolute-from-gregorian mark) + (calendar-absolute-from-gregorian cursor)) + (setq start mark + end cursor) + (setq start cursor + end mark)) + (make-diary-entry + (format "%s(diary-block %s %s)" + sexp-diary-entry-symbol + (calendar-date-string start nil t) + (calendar-date-string end nil t)) + arg))) + +(defun insert-cyclic-diary-entry (arg) + "Insert a cyclic diary entry starting at the date given by point. +Prefix arg will make the entry nonmarking." + (interactive "P") + (let* ((calendar-date-display-form + (if european-calendar-style + '(day " " month " " year) + '(month " " day " " year)))) + (make-diary-entry + (format "%s(diary-cyclic %d %s)" + sexp-diary-entry-symbol + (calendar-read "Repeat every how many days: " + '(lambda (x) (> x 0))) + (calendar-date-string (calendar-cursor-to-date t) nil t)) + arg))) + +(provide 'diary) + +;;; diary.el ends here