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* holidays.el (calendar-holiday-function-fixed,

Browse source 
calendar-holiday-function-float, calendar-holiday-function-julian,
        calendar-holiday-function-islamic,
        calendar-holiday-function-hebrew, calendar-holiday-function-sexp,
        calendar-holiday-function-advent,
        calendar-holiday-function-easter-etc,
        calendar-holiday-function-greek-orthodox-easter,
        calendar-holiday-function-rosh-hashanah-etc,
        calendar-holiday-function-hanukkah,
        calendar-holiday-function-passover-etc,
        calendar-holiday-function-tisha-b-av-etc): Renamed without words
        "calendar" and "function"; changed argument from a list of values to
        individual values.  Fixed doc strings.
        (calendar-holiday-function-if): Removed.
        (calendar-holiday-solar-equinoxes-solstices): Renamed
        solar-equinoxes-solstices.
        (calendar-holiday-list): Rewrote to accomodate the name changes
        above and the unquoting of calendar-holidays.
        (calendar-cursor-holidays):  Change screen-width to frame-width.
        (holiday-sexp): Rewritten.
This commit is contained in:
Jim Blandy 1993-06-22 03:24:23 +00:00
parent c6b6c929dc
commit 8ec105a066
1 changed files with 108 additions and 139 deletions
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247
lisp/calendar/holidays.el
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@ -7,6 +7,7 @@
;; This file is part of GNU Emacs.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY. No author or distributor
;; accepts responsibility to anyone for the consequences of using it
@ -49,7 +50,7 @@
(require 'calendar)
(autoload 'calendar-holiday-function-solar-equinoxes-solstices "solar"
(autoload 'solar-equinoxes-solstices "solar"
"Date and time of equinoxes and solstices, if visible in the calendar window.
Requires floating point."
t)
@ -109,7 +110,7 @@ The holidays are those in the list calendar-holidays."
(msg (format "%s: %s" date-string holiday-string)))
(if (not holiday-list)
(message "No holidays known for %s" date-string)
(if (<= (length msg) (screen-width))
(if (<= (length msg) (frame-width))
(message msg)
(set-buffer (get-buffer-create holiday-buffer))
(setq buffer-read-only nil)
@ -172,81 +173,65 @@ holidays are found, nil if not."
(defun calendar-holiday-list ()
"Form the list of holidays that occur on dates in the calendar window.
The holidays are those in the list calendar-holidays."
(let ((p (eval calendar-holidays))
(let ((p calendar-holidays)
(holiday-list))
(while p
(let* ((function-name
(intern (format "calendar-holiday-function-%s" (car (car p)))))
(holidays
(condition-case nil
(if (cdr (car p));; optional arguments
(funcall function-name (cdr (car p)))
(funcall function-name))
(error
(beep)
(message "Bad holiday list item: %s" (car p))
(sleep-for 2)))))
(let* ((holidays
(if calendar-debug-sexp
(let ((stack-trace-on-error t))
(eval (car p)))
(condition-case nil
(eval (car p))
(error (beep)
(message "Bad holiday list item: %s" (car p))
(sleep-for 2))))))
(if holidays
(setq holiday-list (append holidays holiday-list))))
(setq p (cdr p)))
(setq holiday-list (sort holiday-list 'calendar-date-compare))))
;; Below are the functions that calculate the dates of holidays; these
;; are called by the funcall in the function calendar-holiday-list. If you
;; write other such functions, be sure to imitate the style used below,
;; including the evaluation of each element in the list that constitutes
;; the argument to the function. If you don't do this evaluation, the
;; list calendar-holidays cannot contain expressions (as, for example, in
;; the entry for the Islamic new year.) Also remember that each function
;; must return a list of items of the form ((month day year) string);
;; the date (month day year) should be visible in the calendar window.
;; are eval'ed in the function calendar-holiday-list. If you
;; write other such functions, be sure to imitate the style used below.
;; Remember that each function must return a list of items of the form
;; ((month day year) string) of VISIBLE dates in the calendar window.
(defun calendar-holiday-function-fixed (x)
"Returns the corresponding Gregorian date, if visible in the window, to
(month day) where month is (car X) and day is (car (cdr X)). If it is
visible, the value returned is the list (((month day year) string)) where
string is (car (nthcdr 2 X)). Returns nil if it is not visible in the
current calendar window."
(let* ((month (eval (car x)))
(day (eval (car (cdr x))))
(string (eval (car (nthcdr 2 x))))
(m displayed-month)
(y displayed-year))
(defun holiday-fixed (month day string)
"Holiday on MONTH, DAY (Gregorian) called STRING.
If MONTH, DAY is visible, the value returned is the list (((MONTH DAY year)
STRING)). Returns nil if it is not visible in the current calendar window."
(let ((m displayed-month)
(y displayed-year))
(increment-calendar-month m y (- 11 month))
(if (> m 9)
(list (list (list month day y) string)))))
(defun calendar-holiday-function-float (x)
"Returns the corresponding Gregorian date, if visible in the window, to the
n-th occurrence (negative counts from the end of the month) of dayname in
month where month is (car X), dayname is (car (cdr X)), and n is
(car (nthcdr 2 X)). If it is visible, the value returned is the list
(((month day year) string)) where string is (car (nthcdr 3 X)).
(defun holiday-float (month dayname n string &optional day)
"Holiday on MONTH, DAYNAME (Nth occurrence, Gregorian) called STRING.
If the Nth DAYNAME in MONTH is visible, the value returned is the list
(((MONTH DAY year) STRING)).
If N<0, count backward from the end of MONTH.
An optional parameter DAY means the Nth DAYNAME after/before MONTH DAY.
Returns nil if it is not visible in the current calendar window."
(let* ((month (eval (car x)))
(dayname (eval (car (cdr x))))
(n (eval (car (nthcdr 2 x))))
(string (eval (car (nthcdr 3 x))))
(m displayed-month)
(y displayed-year))
(let ((m displayed-month)
(y displayed-year))
(increment-calendar-month m y (- 11 month))
(if (> m 9)
(list (list (calendar-nth-named-day n dayname month y) string)))))
(list (list (calendar-nth-named-day n dayname month y day) string)))))
(defun calendar-holiday-function-julian (x)
"Returns the corresponding Gregorian date, if visible in the window, to the
Julian date (month day) where month is (car X) and day is (car (cdr X)).
If it is visible, the value returned is the list (((month day year) string))
where string is (car (nthcdr 2 X)). Returns nil if it is not visible in the
current calendar window."
(let* ((month (eval (car x)))
(day (eval (car (cdr x))))
(string (eval (car (nthcdr 2 x))))
(m1 displayed-month)
(y1 displayed-year)
(m2 displayed-month)
(y2 displayed-year)
(year))
(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
@ -264,16 +249,12 @@ current calendar window."
(if (calendar-date-is-visible-p date)
(list (list date string)))))))
(defun calendar-holiday-function-islamic (x)
"Returns the corresponding Gregorian date, if visible in the window, to the
Islamic date (month day) where month is (car X) and day is (car (cdr X)).
If it is visible, the value returned is the list (((month day year) string))
where string is (car (nthcdr 2 X)). Returns nil if it is not visible in
the current calendar window."
(let* ((month (eval (car x)))
(day (eval (car (cdr x))))
(string (eval (car (nthcdr 2 x))))
(islamic-date (calendar-islamic-from-absolute
(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))
@ -288,75 +269,64 @@ the current calendar window."
(if (calendar-date-is-visible-p date)
(list (list date string))))))))
(defun calendar-holiday-function-hebrew (x)
"Returns the corresponding Gregorian date, if visible in the window, to the
Hebrew date (month day) where month is (car X) and day is (car (cdr X)).
If it is visible, the value returned is the list (((month day year) string))
where string is (car (nthcdr 2 X)). Returns nil if it is not visible in
the current calendar window."
(let* ((month (eval (car x)))
(day (eval (car (cdr x))))
(string (eval (car (nthcdr 2 x)))))
(if (memq displayed-month;; This test is only to speed things up a bit;
(list ;; it works fine without the test too.
(if (< 11 month) (- month 11) (+ month 1))
(if (< 10 month) (- month 10) (+ month 2))
(if (< 9 month) (- month 9) (+ month 3))
(if (< 8 month) (- month 8) (+ month 4))
(if (< 7 month) (- month 7) (+ month 5))))
(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)))
(hebrew-start (calendar-hebrew-from-absolute start-date))
(hebrew-end (calendar-hebrew-from-absolute end-date))
(hebrew-y1 (extract-calendar-year hebrew-start))
(hebrew-y2 (extract-calendar-year hebrew-end)))
(setq year (if (< 6 month) hebrew-y2 hebrew-y1))
(let ((date (calendar-gregorian-from-absolute
(calendar-absolute-from-hebrew
(list month day year)))))
(if (calendar-date-is-visible-p date)
(list (list date string)))))))))
(defun holiday-hebrew (month day string)
"Holiday on MONTH, DAY (Hebrew) called STRING.
If MONTH, DAY (Hebrew) 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."
(if (memq displayed-month;; This test is only to speed things up a bit;
(list ;; it works fine without the test too.
(if (< 11 month) (- month 11) (+ month 1))
(if (< 10 month) (- month 10) (+ month 2))
(if (< 9 month) (- month 9) (+ month 3))
(if (< 8 month) (- month 8) (+ month 4))
(if (< 7 month) (- month 7) (+ month 5))))
(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)))
(hebrew-start (calendar-hebrew-from-absolute start-date))
(hebrew-end (calendar-hebrew-from-absolute end-date))
(hebrew-y1 (extract-calendar-year hebrew-start))
(hebrew-y2 (extract-calendar-year hebrew-end)))
(setq year (if (< 6 month) hebrew-y2 hebrew-y1))
(let ((date (calendar-gregorian-from-absolute
(calendar-absolute-from-hebrew
(list month day year)))))
(if (calendar-date-is-visible-p date)
(list (list date string))))))))
(defun calendar-holiday-function-if (x)
"Conditional holiday for dates in the calendar window.
The boolean condition is (car X). If t, the holiday (car (cdr X)) is
checked. If nil, the holiday (car (cdr (cdr X))), if there, is checked."
(let* ((boolean (eval (car x)))
(h (if boolean (car (cdr x)) (car (cdr (cdr x))))))
(if h
(let* ((function-name
(intern (format "calendar-holiday-function-%s" (car h))))
(holidays
(if (cdr h);; optional arguments
(funcall function-name (cdr h))
(funcall function-name))))
holidays))))
(defun calendar-holiday-function-sexp (x)
(defun holiday-sexp (sexp string)
"Sexp holiday for dates in the calendar window.
The sexp (in `year') is (car X). If the sexp evals to a date visible in the
calendar window, the holiday (car (cdr X)) is on that date. If the sexp evals
to nil, or if the date is not visible, there is no holiday."
SEXP is an expression in variable `year' evaluates to `date'.
STRING is an expression in `date' that evaluates to the holiday description
of `date'.
If `date' is visible in the calendar window, the holiday STRING is on that
date. If date is nil, or if the date is not visible, there is no holiday."
(let ((m displayed-month)
(y displayed-year))
(increment-calendar-month m y -1)
(filter-visible-calendar-holidays
(append
(let ((year y))
(list (list (eval (car x)) (eval (car (cdr x))))))
(let ((year (1+ y)))
(list (list (eval (car x)) (eval (car (cdr x))))))))))
(let* ((year y)
(date (eval sexp))
(string (if date (eval string))))
(list (list date string)))
(let* ((year (1+ y))
(date (eval sexp))
(string (if date (eval string))))
(list (list date string)))))))
(defun calendar-holiday-function-advent ()
(defun holiday-advent ()
"Date of Advent, if visible in calendar window."
(let ((year displayed-year)
(month displayed-month))
@ -368,7 +338,7 @@ to nil, or if the date is not visible, there is no holiday."
(if (calendar-date-is-visible-p advent)
(list (list advent "Advent"))))))
(defun calendar-holiday-function-easter-etc ()
(defun holiday-easter-etc ()
"List of dates related to Easter, as visible in calendar window."
(if (and (> displayed-month 5) (not all-christian-calendar-holidays))
nil;; Ash Wednesday, Good Friday, and Easter are not visible.
@ -437,9 +407,8 @@ to nil, or if the date is not visible, there is no holiday."
output-list)))
output-list)))
(defun calendar-holiday-function-greek-orthodox-easter ()
"Date of Easter according to the rule of the Council of Nicaea, if visible
in the calendar window."
(defun holiday-greek-orthodox-easter ()
"Date of Easter according to the rule of the Council of Nicaea."
(let ((m displayed-month)
(y displayed-year))
(increment-calendar-month m y 1)
@ -461,7 +430,7 @@ in the calendar window."
(if (calendar-date-is-visible-p nicaean-easter)
(list (list nicaean-easter "Pascha (Greek Orthodox Easter)"))))))
(defun calendar-holiday-function-rosh-hashanah-etc ()
(defun holiday-rosh-hashanah-etc ()
"List of dates related to Rosh Hashanah, as visible in calendar window."
(if (or (< displayed-month 8)
(> displayed-month 11))
@ -520,7 +489,7 @@ in the calendar window."
output-list)))
output-list)))
(defun calendar-holiday-function-hanukkah ()
(defun holiday-hanukkah ()
"List of dates related to Hanukkah, as visible in calendar window."
(if (memq displayed-month;; This test is only to speed things up a bit;
'(10 11 12 1 2));; it works fine without the test too.
@ -553,7 +522,7 @@ in the calendar window."
(list (calendar-gregorian-from-absolute (+ abs-h 7))
"Hanukkah (eighth day)")))))))
(defun calendar-holiday-function-passover-etc ()
(defun holiday-passover-etc ()
"List of dates related to Passover, as visible in calendar window."
(if (< 7 displayed-month)
nil;; None of the dates is visible
@ -634,7 +603,7 @@ in the calendar window."
output-list)))
output-list)))
(defun calendar-holiday-function-tisha-b-av-etc ()
(defun holiday-tisha-b-av-etc ()
"List of dates around Tisha B'Av, as visible in calendar window."
(if (or (< displayed-month 5)
(> displayed-month 9))