1;;; diary-lib.el --- diary functions
2
3;; Copyright (C) 1989, 1990, 1992, 1993, 1994, 1995, 2001, 2002, 2003,
4;;   2004, 2005, 2006, 2007  Free Software Foundation, Inc.
5
6;; Author: Edward M. Reingold <reingold@cs.uiuc.edu>
7;; Maintainer: Glenn Morris <rgm@gnu.org>
8;; Keywords: calendar
9
10;; This file is part of GNU Emacs.
11
12;; GNU Emacs is free software; you can redistribute it and/or modify
13;; it under the terms of the GNU General Public License as published by
14;; the Free Software Foundation; either version 2, or (at your option)
15;; any later version.
16
17;; GNU Emacs is distributed in the hope that it will be useful,
18;; but WITHOUT ANY WARRANTY; without even the implied warranty of
19;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20;; GNU General Public License for more details.
21
22;; You should have received a copy of the GNU General Public License
23;; along with GNU Emacs; see the file COPYING.  If not, write to the
24;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
25;; Boston, MA 02110-1301, USA.
26
27;;; Commentary:
28
29;; This collection of functions implements the diary features as described
30;; in calendar.el.
31
32;;; Code:
33
34(require 'calendar)
35
36(defun diary-check-diary-file ()
37  "Check that the file specified by `diary-file' exists and is readable.
38If so, return the expanded file name, otherwise signal an error."
39  (let ((d-file (substitute-in-file-name diary-file)))
40    (if (and d-file (file-exists-p d-file))
41        (if (file-readable-p d-file)
42            d-file
43          (error "Diary file `%s' is not readable" diary-file))
44      (error "Diary file `%s' does not exist" diary-file))))
45
46;;;###autoload
47(defun diary (&optional arg)
48  "Generate the diary window for ARG days starting with the current date.
49If no argument is provided, the number of days of diary entries is governed
50by the variable `number-of-diary-entries'.  A value of ARG less than 1
51does nothing.  This function is suitable for execution in a `.emacs' file."
52  (interactive "P")
53  (diary-check-diary-file)
54  (let ((date (calendar-current-date)))
55    (diary-list-entries date (if arg (prefix-numeric-value arg)))))
56
57(define-obsolete-function-alias 'view-diary-entries 'diary-view-entries)
58(defun diary-view-entries (&optional arg)
59  "Prepare and display a buffer with diary entries.
60Searches the file named in `diary-file' for entries that
61match ARG days starting with the date indicated by the cursor position
62in the displayed three-month calendar."
63  (interactive "p")
64  (diary-check-diary-file)
65  (diary-list-entries (calendar-cursor-to-date t) arg))
66
67(defun view-other-diary-entries (arg d-file)
68  "Prepare and display buffer of diary entries from an alternative diary file.
69Searches for entries that match ARG days, starting with the date indicated
70by the cursor position in the displayed three-month calendar.
71D-FILE specifies the file to use as the diary file."
72  (interactive
73   (list (prefix-numeric-value current-prefix-arg)
74         (read-file-name "Enter diary file name: " default-directory nil t)))
75  (let ((diary-file d-file))
76    (diary-view-entries arg)))
77
78(autoload 'check-calendar-holidays "holidays"
79  "Check the list of holidays for any that occur on DATE.
80The value returned is a list of strings of relevant holiday descriptions.
81The holidays are those in the list `calendar-holidays'.")
82
83(autoload 'calendar-holiday-list "holidays"
84  "Form the list of holidays that occur on dates in the calendar window.
85The holidays are those in the list `calendar-holidays'.")
86
87(autoload 'diary-french-date "cal-french"
88  "French calendar equivalent of date diary entry.")
89
90(autoload 'diary-mayan-date "cal-mayan"
91  "Mayan calendar equivalent of date diary entry.")
92
93(autoload 'diary-iso-date "cal-iso"
94  "ISO calendar equivalent of date diary entry.")
95
96(autoload 'diary-julian-date "cal-julian"
97  "Julian calendar equivalent of date diary entry.")
98
99(autoload 'diary-astro-day-number "cal-julian"
100  "Astronomical (Julian) day number diary entry.")
101
102(autoload 'diary-chinese-date "cal-china"
103  "Chinese calendar equivalent of date diary entry.")
104
105(autoload 'diary-islamic-date "cal-islam"
106  "Islamic calendar equivalent of date diary entry.")
107
108(autoload 'list-islamic-diary-entries "cal-islam"
109  "Add any Islamic date entries from the diary file to `diary-entries-list'.")
110
111(autoload 'mark-islamic-diary-entries "cal-islam"
112  "Mark days in the calendar window that have Islamic date diary entries.")
113
114(autoload 'mark-islamic-calendar-date-pattern "cal-islam"
115   "Mark dates in calendar window that conform to Islamic date MONTH/DAY/YEAR.")
116
117(autoload 'diary-bahai-date "cal-bahai"
118  "Baha'i calendar equivalent of date diary entry.")
119
120(autoload 'list-bahai-diary-entries "cal-bahai"
121  "Add any Baha'i date entries from the diary file to `diary-entries-list'.")
122
123(autoload 'mark-bahai-diary-entries "cal-bahai"
124  "Mark days in the calendar window that have Baha'i date diary entries.")
125
126(autoload 'mark-bahai-calendar-date-pattern "cal-bahai"
127   "Mark dates in calendar window that conform to Baha'i date MONTH/DAY/YEAR.")
128
129(autoload 'diary-hebrew-date "cal-hebrew"
130  "Hebrew calendar equivalent of date diary entry.")
131
132(autoload 'diary-omer "cal-hebrew"
133  "Omer count diary entry.")
134
135(autoload 'diary-yahrzeit "cal-hebrew"
136  "Yahrzeit diary entry--entry applies if date is yahrzeit or the day before.")
137
138(autoload 'diary-parasha "cal-hebrew"
139  "Parasha diary entry--entry applies if date is a Saturday.")
140
141(autoload 'diary-rosh-hodesh "cal-hebrew"
142  "Rosh Hodesh diary entry.")
143
144(autoload 'list-hebrew-diary-entries "cal-hebrew"
145  "Add any Hebrew date entries from the diary file to `diary-entries-list'.")
146
147(autoload 'mark-hebrew-diary-entries "cal-hebrew"
148  "Mark days in the calendar window that have Hebrew date diary entries.")
149
150(autoload 'mark-hebrew-calendar-date-pattern "cal-hebrew"
151   "Mark dates in calendar window that conform to Hebrew date MONTH/DAY/YEAR.")
152
153(autoload 'diary-coptic-date "cal-coptic"
154  "Coptic calendar equivalent of date diary entry.")
155
156(autoload 'diary-ethiopic-date "cal-coptic"
157  "Ethiopic calendar equivalent of date diary entry.")
158
159(autoload 'diary-persian-date "cal-persia"
160  "Persian calendar equivalent of date diary entry.")
161
162(autoload 'diary-phases-of-moon "lunar" "Moon phases diary entry.")
163
164(autoload 'diary-sunrise-sunset "solar"
165  "Local time of sunrise and sunset as a diary entry.")
166
167(autoload 'diary-sabbath-candles "solar"
168  "Local time of candle lighting diary entry--applies if date is a Friday.
169No diary entry if there is no sunset on that date.")
170
171(defvar diary-syntax-table
172  (let ((st (copy-syntax-table (standard-syntax-table))))
173    (modify-syntax-entry ?* "w" st)
174    (modify-syntax-entry ?: "w" st)
175    st)
176  "The syntax table used when parsing dates in the diary file.
177It is the standard syntax table used in Fundamental mode, but with the
178syntax of `*' and `:' changed to be word constituents.")
179
180(defvar diary-entries-list)
181(defvar displayed-year)
182(defvar displayed-month)
183(defvar entry)
184(defvar date)
185(defvar number)
186(defvar date-string)
187(defvar original-date)
188
189(defun diary-attrtype-convert (attrvalue type)
190  "Convert string ATTRVALUE to TYPE appropriate for a face description.
191Valid TYPEs are: string, symbol, int, stringtnil, tnil."
192  (let (ret)
193    (setq ret (cond ((eq type 'string) attrvalue)
194		    ((eq type 'symbol) (read attrvalue))
195		    ((eq type 'int) (string-to-number attrvalue))
196		    ((eq type 'stringtnil)
197		     (cond ((string= "t" attrvalue) t)
198			   ((string= "nil" attrvalue) nil)
199			   (t attrvalue)))
200		    ((eq type 'tnil)
201		     (cond ((string= "t" attrvalue) t)
202			   ((string= "nil" attrvalue) nil)))))
203;    (message "(%s)[%s]=[%s]" (print type) attrvalue ret)
204    ret))
205
206
207(defun diary-pull-attrs (entry fileglobattrs)
208  "Pull the face-related attributes off the entry, merge with the
209fileglobattrs, and return the (possibly modified) entry and face
210data in a list of attrname attrvalue values.
211The entry will be modified to drop all tags that are used for face matching.
212If entry is nil, then the fileglobattrs are being searched for,
213the fileglobattrs variable is ignored, and
214diary-glob-file-regexp-prefix is prepended to the regexps before each
215search."
216  (save-excursion
217    (let (regexp regnum attrname attr-list attrname attrvalue type
218                 ret-attr attr)
219      (if (null entry)
220	  (progn
221	    (setq ret-attr '()
222		  attr-list diary-face-attrs)
223	    (while attr-list
224	      (goto-char (point-min))
225	      (setq attr (car attr-list)
226		    regexp (nth 0 attr)
227		    regnum (nth 1 attr)
228		    attrname (nth 2 attr)
229		    type (nth 3 attr)
230		    regexp (concat diary-glob-file-regexp-prefix regexp))
231	      (setq attrvalue nil)
232	      (if (re-search-forward regexp (point-max) t)
233		  (setq attrvalue (match-string-no-properties regnum)))
234	      (if (and attrvalue
235		       (setq attrvalue (diary-attrtype-convert attrvalue type)))
236		  (setq ret-attr (append ret-attr (list attrname attrvalue))))
237	      (setq attr-list (cdr attr-list)))
238	    (setq fileglobattrs ret-attr))
239	(progn
240	  (setq ret-attr fileglobattrs
241		attr-list diary-face-attrs)
242	  (while attr-list
243	    (goto-char (point-min))
244	    (setq attr (car attr-list)
245		  regexp (nth 0 attr)
246		  regnum (nth 1 attr)
247		  attrname (nth 2 attr)
248		  type (nth 3 attr))
249	    (setq attrvalue nil)
250	    (if (string-match regexp entry)
251		(progn
252		  (setq attrvalue (match-string-no-properties regnum entry))
253		  (setq entry (replace-match "" t t entry))))
254	    (if (and attrvalue
255		     (setq attrvalue (diary-attrtype-convert attrvalue type)))
256		(setq ret-attr (append ret-attr (list attrname attrvalue))))
257	    (setq attr-list (cdr attr-list)))))
258      (list entry ret-attr))))
259
260(defun diary-set-maybe-redraw (symbol value)
261  "Set SYMBOL's value to VALUE, and redraw the diary if necessary.
262Redraws the diary if it is being displayed (note this is not the same as
263just visiting the `diary-file'), and SYMBOL's value is to be changed."
264  (let ((oldvalue (eval symbol)))
265    (custom-set-default symbol value)
266    (and (not (equal value oldvalue))
267         (diary-live-p)
268         ;; Note this assumes diary was called without prefix arg.
269         (diary))))
270
271;; This can be removed once the kill/yank treatment of invisible text
272;; (see etc/TODO) is fixed. -- gm
273(defcustom diary-header-line-flag t
274  "If non-nil, `simple-diary-display' will show a header line.
275The format of the header is specified by `diary-header-line-format'."
276  :group   'diary
277  :type    'boolean
278  :initialize 'custom-initialize-default
279  ;; FIXME overkill.
280  :set 'diary-set-maybe-redraw
281  :version "22.1")
282
283(defvar diary-selective-display nil)
284
285(defcustom diary-header-line-format
286  '(:eval (calendar-string-spread
287           (list (if diary-selective-display
288                     "Selective display active - press \"s\" in calendar \
289before edit/copy"
290                   "Diary"))
291           ?\s (frame-width)))
292  "Format of the header line displayed by `simple-diary-display'.
293Only used if `diary-header-line-flag' is non-nil."
294  :group   'diary
295  :type    'sexp
296  :initialize 'custom-initialize-default
297  ;; FIXME overkill.
298  :set 'diary-set-maybe-redraw
299  :version "22.1")
300
301(defvar diary-saved-point)		; internal
302
303;; The first version of this also checked for diary-selective-display
304;; in the non-fancy case. This was an attempt to distinguish between
305;; displaying the diary and just visiting the diary file. However,
306;; when using fancy diary, calling diary when there are no entries to
307;; display does not create the fancy buffer, nor does it switch on
308;; selective-display in the diary buffer. This means some
309;; customizations will not take effect, eg:
310;; http://lists.gnu.org/archive/html/emacs-pretest-bug/2007-03/msg00466.html
311;; So the check for selective-display was dropped. This means the
312;; diary will be displayed if one customizes a diary variable while
313;; just visiting the diary-file. This is i) unlikely, and ii) no great loss.
314(defun diary-live-p ()
315  "Return non-nil if the diary is being displayed."
316  (or (get-buffer fancy-diary-buffer)
317      (and diary-file
318           (find-buffer-visiting (substitute-in-file-name diary-file)))))
319
320(defcustom number-of-diary-entries 1
321  "Specifies how many days of diary entries are to be displayed initially.
322This variable affects the diary display when the command \\[diary] is used,
323or if the value of the variable `view-diary-entries-initially' is t.  For
324example, if the default value 1 is used, then only the current day's diary
325entries will be displayed.  If the value 2 is used, then both the current
326day's and the next day's entries will be displayed.
327
328The value can also be a vector such as [0 2 2 2 2 4 1]; this value
329says to display no diary entries on Sunday, the entries for
330the current date and the day after on Monday through Thursday,
331Friday through Monday's entries on Friday, and only Saturday's
332entries on Saturday.
333
334This variable does not affect the diary display with the `d' command
335from the calendar; in that case, the prefix argument controls the
336number of days of diary entries displayed."
337  :type '(choice (integer :tag "Entries")
338		 (vector :value [0 0 0 0 0 0 0]
339			 (integer :tag "Sunday")
340			 (integer :tag "Monday")
341			 (integer :tag "Tuesday")
342			 (integer :tag "Wednesday")
343			 (integer :tag "Thursday")
344			 (integer :tag "Friday")
345			 (integer :tag "Saturday")))
346  :initialize 'custom-initialize-default
347  :set 'diary-set-maybe-redraw
348  :group 'diary)
349
350
351(defvar diary-modify-entry-list-string-function nil
352  "Function applied to entry string before putting it into the entries list.
353Can be used by programs integrating a diary list into other buffers (e.g.
354org.el and planner.el) to modify the string or add properties to it.
355The function takes a string argument and must return a string.")
356
357(defun add-to-diary-list (date string specifier &optional marker
358                               globcolor literal)
359  "Add an entry to `diary-entries-list'.
360Do nothing if DATE or STRING is nil.  DATE is the (MONTH DAY
361YEAR) for which the entry applies; STRING is the text of the
362entry as it will appear in the diary (i.e. with any format
363strings such as \"%d\" expanded); SPECIFIER is the date part of
364the entry as it appears in the diary-file; LITERAL is the entry
365as it appears in the diary-file (i.e. before expansion).  If
366LITERAL is nil, it is taken to be the same as STRING.
367
368The entry is added to the list as (DATE STRING SPECIFIER LOCATOR
369GLOBCOLOR), where LOCATOR has the form (MARKER FILENAME LITERAL),
370FILENAME being the file containing the diary entry."
371  (when (and date string)
372    (if diary-file-name-prefix
373        (let ((prefix (funcall diary-file-name-prefix-function
374                               (buffer-file-name))))
375          (or (string= prefix "")
376              (setq string (format "[%s] %s" prefix string)))))
377    (and diary-modify-entry-list-string-function
378	 (setq string (funcall diary-modify-entry-list-string-function
379			       string)))
380    (setq diary-entries-list
381          (append diary-entries-list
382                  (list (list date string specifier
383                              (list marker (buffer-file-name) literal)
384                              globcolor))))))
385
386(define-obsolete-function-alias 'list-diary-entries 'diary-list-entries)
387(defun diary-list-entries (date number &optional list-only)
388  "Create and display a buffer containing the relevant lines in `diary-file'.
389The arguments are DATE and NUMBER; the entries selected are those
390for NUMBER days starting with date DATE.  The other entries are hidden
391using selective display.  If NUMBER is less than 1, this function does nothing.
392
393Returns a list of all relevant diary entries found, if any, in order by date.
394The list entries have the form ((MONTH DAY YEAR) STRING SPECIFIER) where
395\(MONTH DAY YEAR) is the date of the entry, STRING is the entry text, and
396SPECIFIER is the applicability.  If the variable `diary-list-include-blanks'
397is t, this list includes a dummy diary entry consisting of the empty string
398for a date with no diary entries.
399
400After the list is prepared, the hooks `nongregorian-diary-listing-hook',
401`list-diary-entries-hook', `diary-display-hook', and `diary-hook' are run.
402These hooks have the following distinct roles:
403
404    `nongregorian-diary-listing-hook' can cull dates from the diary
405        and each included file.  Usually used for Hebrew or Islamic
406        diary entries in files.  Applied to *each* file.
407
408    `list-diary-entries-hook' adds or manipulates diary entries from
409        external sources.  Used, for example, to include diary entries
410        from other files or to sort the diary entries.  Invoked *once* only,
411        before the display hook is run.
412
413    `diary-display-hook' does the actual display of information.  If this is
414        nil, simple-diary-display will be used.  Use add-hook to set this to
415        fancy-diary-display, if desired.  If you want no diary display, use
416        add-hook to set this to ignore.
417
418    `diary-hook' is run last.  This can be used for an appointment
419        notification function.
420
421If LIST-ONLY is non-nil don't modify or display the buffer, only return a list."
422  (unless number
423    (setq number (if (vectorp number-of-diary-entries)
424                     (aref number-of-diary-entries (calendar-day-of-week date))
425                   number-of-diary-entries)))
426  (when (> number 0)
427    (let ((original-date date);; save for possible use in the hooks
428          diary-entries-list
429          file-glob-attrs
430          (date-string (calendar-date-string date))
431          (d-file (substitute-in-file-name diary-file)))
432      (message "Preparing diary...")
433      (save-excursion
434        (let ((diary-buffer (find-buffer-visiting d-file)))
435          (if (not diary-buffer)
436              (set-buffer (find-file-noselect d-file t))
437            (set-buffer diary-buffer)
438            (or (verify-visited-file-modtime diary-buffer)
439                (revert-buffer t t))))
440        ;; Setup things like the header-line-format and invisibility-spec.
441        (if (eq major-mode default-major-mode)
442            (diary-mode)
443          ;; This kludge is to make customizations to
444          ;; diary-header-line-flag after diary has been displayed
445          ;; take effect. Unconditionally calling (diary-mode)
446          ;; clobbers file local variables.
447          ;; http://lists.gnu.org/archive/html/emacs-pretest-bug/2007-03/msg00363.html
448          ;; http://lists.gnu.org/archive/html/emacs-pretest-bug/2007-04/msg00404.html
449          (if (eq major-mode 'diary-mode)
450              (setq header-line-format (and diary-header-line-flag
451                                            diary-header-line-format))))
452        ;; d-s-p is passed to the diary display function.
453        (let ((diary-saved-point (point)))
454          (save-excursion
455            (setq file-glob-attrs (nth 1 (diary-pull-attrs nil "")))
456            (with-syntax-table diary-syntax-table
457              (let ((mark (regexp-quote diary-nonmarking-symbol)))
458                (goto-char (point-min))
459                (unless list-only
460                  (let ((ol (make-overlay (point-min) (point-max) nil t nil)))
461                    (set (make-local-variable 'diary-selective-display) t)
462                    (overlay-put ol 'invisible 'diary)
463                    (overlay-put ol 'evaporate t)))
464                (calendar-for-loop
465                 i from 1 to number do
466                 (let ((month (extract-calendar-month date))
467                       (day (extract-calendar-day date))
468                       (year (extract-calendar-year date))
469                       (entry-found (list-sexp-diary-entries date)))
470                   (dolist (date-form diary-date-forms)
471                     (let*
472                         ((backup (when (eq (car date-form) 'backup)
473                                    (setq date-form (cdr date-form))
474                                    t))
475                          (dayname
476                           (format "%s\\|%s\\.?"
477                                   (calendar-day-name date)
478                                   (calendar-day-name date 'abbrev)))
479                          (monthname
480                           (format "\\*\\|%s\\|%s\\.?"
481                                   (calendar-month-name month)
482                                   (calendar-month-name month 'abbrev)))
483                          (month (concat "\\*\\|0*" (int-to-string month)))
484                          (day (concat "\\*\\|0*" (int-to-string day)))
485                          (year
486                           (concat
487                            "\\*\\|0*" (int-to-string year)
488                            (if abbreviated-calendar-year
489                                (concat "\\|" (format "%02d" (% year 100)))
490                              "")))
491                          (regexp
492                           (concat
493                            "\\(\\`\\|\^M\\|\n\\)" mark "?\\("
494                            (mapconcat 'eval date-form "\\)\\(?:")
495                            "\\)"))
496                          (case-fold-search t))
497                       (goto-char (point-min))
498                       (while (re-search-forward regexp nil t)
499                         (if backup (re-search-backward "\\<" nil t))
500                         (if (and (or (char-equal (preceding-char) ?\^M)
501                                      (char-equal (preceding-char) ?\n))
502                                  (not (looking-at " \\|\^I")))
503                             ;;  Diary entry that consists only of date.
504                             (backward-char 1)
505                           ;; Found a nonempty diary entry--make it
506                           ;; visible and add it to the list.
507                           (setq entry-found t)
508                           (let ((entry-start (point))
509                                 date-start temp)
510                             (re-search-backward "\^M\\|\n\\|\\`")
511                             (setq date-start (point))
512                             ;; When selective display (rather than
513                             ;; overlays) was used, diary file used to
514                             ;; start in a blank line and end in a
515                             ;; newline. Now that neither of these
516                             ;; need be true, 'move handles the latter
517                             ;; and 1/2 kludge the former.
518                             (re-search-forward
519                              "\^M\\|\n" nil 'move
520                              (if (and (bobp) (not (looking-at "\^M\\|\n")))
521                                  1
522                                2))
523                             (while (looking-at " \\|\^I")
524                               (re-search-forward "\^M\\|\n" nil 'move))
525                             (unless (and (eobp) (not (bolp)))
526                               (backward-char 1))
527                             (unless list-only
528                               (remove-overlays date-start (point)
529                                                'invisible 'diary))
530                             (setq entry (buffer-substring entry-start (point))
531                                   temp (diary-pull-attrs entry file-glob-attrs)
532                                   entry (nth 0 temp))
533                             (add-to-diary-list
534                              date
535                              entry
536                              (buffer-substring
537                               (1+ date-start) (1- entry-start))
538                              (copy-marker entry-start) (nth 1 temp)))))))
539                   (or entry-found
540                       (not diary-list-include-blanks)
541                       (add-to-diary-list date "" "" "" ""))
542                   (setq date
543                         (calendar-gregorian-from-absolute
544                          (1+ (calendar-absolute-from-gregorian date))))
545                   (setq entry-found nil)))))
546            (goto-char (point-min))
547            (run-hooks 'nongregorian-diary-listing-hook
548                       'list-diary-entries-hook)
549            (unless list-only
550              (if diary-display-hook
551                  (run-hooks 'diary-display-hook)
552                (simple-diary-display)))
553            (run-hooks 'diary-hook)
554            diary-entries-list))))))
555
556(defun diary-unhide-everything ()
557  (kill-local-variable 'diary-selective-display)
558  (remove-overlays (point-min) (point-max) 'invisible 'diary)
559  (kill-local-variable 'mode-line-format))
560
561(defun include-other-diary-files ()
562  "Include the diary entries from other diary files with those of diary-file.
563This function is suitable for use in `list-diary-entries-hook';
564it enables you to use shared diary files together with your own.
565The files included are specified in the diaryfile by lines of this form:
566        #include \"filename\"
567This is recursive; that is, #include directives in diary files thus included
568are obeyed.  You can change the `#include' to some other string by
569changing the variable `diary-include-string'."
570  (goto-char (point-min))
571  (while (re-search-forward
572          (concat
573           "\\(?:\\`\\|\^M\\|\n\\)"
574           (regexp-quote diary-include-string)
575           " \"\\([^\"]*\\)\"")
576          nil t)
577    (let* ((diary-file (substitute-in-file-name
578                        (match-string-no-properties 1)))
579           (diary-list-include-blanks nil)
580           (list-diary-entries-hook 'include-other-diary-files)
581           (diary-display-hook 'ignore)
582           (diary-hook nil))
583      (if (file-exists-p diary-file)
584          (if (file-readable-p diary-file)
585              (unwind-protect
586                  (setq diary-entries-list
587                        (append diary-entries-list
588                                (diary-list-entries original-date number)))
589                (with-current-buffer (find-buffer-visiting diary-file)
590                  (diary-unhide-everything)))
591            (beep)
592            (message "Can't read included diary file %s" diary-file)
593            (sleep-for 2))
594        (beep)
595        (message "Can't find included diary file %s" diary-file)
596        (sleep-for 2))))
597    (goto-char (point-min)))
598
599(defun simple-diary-display ()
600  "Display the diary buffer if there are any relevant entries or holidays."
601  (let* ((holiday-list (if holidays-in-diary-buffer
602                           (check-calendar-holidays original-date)))
603         (hol-string (format "%s%s%s"
604                             date-string
605                             (if holiday-list ": " "")
606                             (mapconcat 'identity holiday-list "; ")))
607         (msg (format "No diary entries for %s" hol-string))
608         ;; If selected window is dedicated (to the calendar),
609         ;; need a new one to display the diary.
610         (pop-up-frames (window-dedicated-p (selected-window))))
611    (calendar-set-mode-line (format "Diary for %s" hol-string))
612    (if (or (not diary-entries-list)
613            (and (not (cdr diary-entries-list))
614                 (string-equal (car (cdr (car diary-entries-list))) "")))
615        (if (< (length msg) (frame-width))
616            (message "%s" msg)
617          (set-buffer (get-buffer-create holiday-buffer))
618          (setq buffer-read-only nil)
619          (calendar-set-mode-line date-string)
620          (erase-buffer)
621          (insert (mapconcat 'identity holiday-list "\n"))
622          (goto-char (point-min))
623          (set-buffer-modified-p nil)
624          (setq buffer-read-only t)
625          (display-buffer holiday-buffer)
626          (message  "No diary entries for %s" date-string))
627      (with-current-buffer
628          (find-buffer-visiting (substitute-in-file-name diary-file))
629        (let ((window (display-buffer (current-buffer))))
630          ;; d-s-p is passed from list-diary-entries.
631          (set-window-point window diary-saved-point)
632          (set-window-start window (point-min))))
633      (message "Preparing diary...done"))))
634
635(defface diary-button '((((type pc) (class color))
636			 (:foreground "lightblue")))
637  "Default face used for buttons."
638  :version "22.1"
639  :group 'diary)
640;; backward-compatibility alias
641(put 'diary-button-face 'face-alias 'diary-button)
642
643(define-button-type 'diary-entry
644  'action #'diary-goto-entry
645  'face 'diary-button)
646
647(defun diary-goto-entry (button)
648  (let* ((locator (button-get button 'locator))
649         (marker (car locator))
650         markbuf file)
651    ;; If marker pointing to diary location is valid, use that.
652    (if (and marker (setq markbuf (marker-buffer marker)))
653        (progn
654          (pop-to-buffer markbuf)
655          (goto-char (marker-position marker)))
656      ;; Marker is invalid (eg buffer has been killed).
657      (or (and (setq file (cadr locator))
658               (file-exists-p file)
659               (find-file-other-window file)
660               (progn
661                 (when (eq major-mode default-major-mode) (diary-mode))
662                 (goto-char (point-min))
663                 (if (re-search-forward (format "%s.*\\(%s\\)"
664                                                (regexp-quote (nth 2 locator))
665                                                (regexp-quote (nth 3 locator)))
666                                        nil t)
667                     (goto-char (match-beginning 1)))))
668          (message "Unable to locate this diary entry")))))
669
670(defun fancy-diary-display ()
671  "Prepare a diary buffer with relevant entries in a fancy, noneditable form.
672This function is provided for optional use as the `diary-display-hook'."
673  (with-current-buffer ;; Turn off selective-display in the diary file's buffer.
674      (find-buffer-visiting (substitute-in-file-name diary-file))
675    (diary-unhide-everything))
676  (if (or (not diary-entries-list)
677          (and (not (cdr diary-entries-list))
678               (string-equal (car (cdr (car diary-entries-list))) "")))
679      (let* ((holiday-list (if holidays-in-diary-buffer
680                               (check-calendar-holidays original-date)))
681             (msg (format "No diary entries for %s %s"
682                          (concat date-string (if holiday-list ":" ""))
683                          (mapconcat 'identity holiday-list "; "))))
684        (if (<= (length msg) (frame-width))
685            (message "%s" msg)
686          (set-buffer (get-buffer-create holiday-buffer))
687          (setq buffer-read-only nil)
688          (erase-buffer)
689          (insert (mapconcat 'identity holiday-list "\n"))
690          (goto-char (point-min))
691          (set-buffer-modified-p nil)
692          (setq buffer-read-only t)
693          (display-buffer holiday-buffer)
694          (message  "No diary entries for %s" date-string)))
695    (with-current-buffer;; Prepare the fancy diary buffer.
696        (make-fancy-diary-buffer)
697      (setq buffer-read-only nil)
698      (let ((entry-list diary-entries-list)
699            (holiday-list)
700            (holiday-list-last-month 1)
701            (holiday-list-last-year 1)
702            (date (list 0 0 0)))
703        (while entry-list
704          (if (not (calendar-date-equal date (car (car entry-list))))
705              (progn
706                (setq date (car (car entry-list)))
707                (and holidays-in-diary-buffer
708                     (calendar-date-compare
709                      (list (list holiday-list-last-month
710                                  (calendar-last-day-of-month
711                                   holiday-list-last-month
712                                   holiday-list-last-year)
713                                  holiday-list-last-year))
714                      (list date))
715                     ;; We need to get the holidays for the next 3 months.
716                     (setq holiday-list-last-month
717                           (extract-calendar-month date))
718                     (setq holiday-list-last-year
719                           (extract-calendar-year date))
720                     (progn
721                       (increment-calendar-month
722                        holiday-list-last-month holiday-list-last-year 1)
723                       t)
724                     (setq holiday-list
725                           (let ((displayed-month holiday-list-last-month)
726                                 (displayed-year holiday-list-last-year))
727                             (calendar-holiday-list)))
728                     (increment-calendar-month
729                      holiday-list-last-month holiday-list-last-year 1))
730                (let* ((date-string (calendar-date-string date))
731                       (date-holiday-list
732                        (let ((h holiday-list)
733                              (d))
734                          ;; Make a list of all holidays for date.
735                          (while h
736                            (if (calendar-date-equal date (car (car h)))
737                                (setq d (append d (cdr (car h)))))
738                            (setq h (cdr h)))
739                          d)))
740                  (insert (if (= (point) (point-min)) "" ?\n) date-string)
741                  (if date-holiday-list (insert ":  "))
742                  (let* ((l (current-column))
743                         (longest 0))
744                    (insert (mapconcat (lambda (x)
745					 (if (< longest (length x))
746					     (setq longest (length x)))
747					 x)
748                                       date-holiday-list
749                                       (concat "\n" (make-string l ? ))))
750                    (insert ?\n (make-string (+ l longest) ?=) ?\n)))))
751
752	  (setq entry (car (cdr (car entry-list))))
753	  (if (< 0 (length entry))
754              (let ((this-entry (car entry-list))
755                    this-loc)
756		(if (setq this-loc (nth 3 this-entry))
757		    (insert-button (concat entry "\n")
758                                   ;; (MARKER FILENAME SPECIFIER LITERAL)
759                                   'locator (list (car this-loc)
760                                                  (cadr this-loc)
761                                                  (nth 2 this-entry)
762                                                  (or (nth 2 this-loc)
763                                                      (nth 1 this-entry)))
764				   :type 'diary-entry)
765		  (insert entry ?\n))
766		(save-excursion
767                  (let* ((marks (nth 4 this-entry))
768                         (faceinfo marks)
769                         temp-face)
770                    (when marks
771                      (setq temp-face (make-symbol
772                                       (apply
773                                        'concat "temp-face-"
774                                        (mapcar (lambda (sym)
775                                                  (if (stringp sym)
776                                                      sym
777                                                    (symbol-name sym)))
778                                                marks))))
779                      (make-face temp-face)
780                      ;; Remove :face info from the marks,
781                      ;; copy the face info into temp-face
782                      (while (setq faceinfo (memq :face faceinfo))
783                        (copy-face (read (nth 1 faceinfo)) temp-face)
784                        (setcar faceinfo nil)
785                        (setcar (cdr faceinfo) nil))
786                      (setq marks (delq nil marks))
787                      ;; Apply the font aspects.
788                      (apply 'set-face-attribute temp-face nil marks)
789                      (search-backward entry)
790                      (overlay-put
791                       (make-overlay (match-beginning 0) (match-end 0))
792                       'face temp-face))))))
793	  (setq entry-list (cdr entry-list))))
794      (set-buffer-modified-p nil)
795      (goto-char (point-min))
796      (setq buffer-read-only t)
797      (display-buffer fancy-diary-buffer)
798      (fancy-diary-display-mode)
799      (calendar-set-mode-line date-string)
800      (message "Preparing diary...done"))))
801
802(defun make-fancy-diary-buffer ()
803  "Create and return the initial fancy diary buffer."
804  (with-current-buffer (get-buffer-create fancy-diary-buffer)
805    (setq buffer-read-only nil)
806    (calendar-set-mode-line "Diary Entries")
807    (erase-buffer)
808    (set-buffer-modified-p nil)
809    (setq buffer-read-only t)
810    (get-buffer fancy-diary-buffer)))
811
812(defun print-diary-entries ()
813  "Print a hard copy of the diary display.
814
815If the simple diary display is being used, prepare a temp buffer with the
816visible lines of the diary buffer, add a heading line composed from the mode
817line, print the temp buffer, and destroy it.
818
819If the fancy diary display is being used, just print the buffer.
820
821The hooks given by the variable `print-diary-entries-hook' are called to do
822the actual printing."
823  (interactive)
824  (if (bufferp (get-buffer fancy-diary-buffer))
825      (with-current-buffer (get-buffer fancy-diary-buffer)
826        (run-hooks 'print-diary-entries-hook))
827    (let ((diary-buffer
828           (find-buffer-visiting (substitute-in-file-name diary-file))))
829      (if diary-buffer
830          (let ((temp-buffer (get-buffer-create " *Printable Diary Entries*"))
831                (heading))
832            (with-current-buffer diary-buffer
833              (setq heading
834                    (if (not (stringp mode-line-format))
835                        "All Diary Entries"
836                      (string-match "^-*\\([^-].*[^-]\\)-*$" mode-line-format)
837                      (match-string 1 mode-line-format)))
838              (let ((start (point-min))
839                    end)
840                (while
841                    (progn
842                      (setq end (next-single-char-property-change
843                                 start 'invisible))
844                      (if (get-char-property start 'invisible)
845                          nil
846                        (with-current-buffer temp-buffer
847                          (insert-buffer-substring diary-buffer
848                                                   start (or end (point-max)))))
849                      (setq start end)
850                      (and end (< end (point-max))))))
851              (set-buffer temp-buffer)
852              (goto-char (point-min))
853              (insert heading "\n"
854                      (make-string (length heading) ?=) "\n")
855              (run-hooks 'print-diary-entries-hook)
856              (kill-buffer temp-buffer)))
857        (error "You don't have a diary buffer!")))))
858
859(define-obsolete-function-alias 'show-all-diary-entries 'diary-show-all-entries)
860(defun diary-show-all-entries ()
861  "Show all of the diary entries in the diary file.
862This function gets rid of the selective display of the diary file so that
863all entries, not just some, are visible.  If there is no diary buffer, one
864is created."
865  (interactive)
866  (let ((d-file (diary-check-diary-file))
867        (pop-up-frames (window-dedicated-p (selected-window))))
868    (with-current-buffer (or (find-buffer-visiting d-file)
869                             (find-file-noselect d-file t))
870      (when (eq major-mode default-major-mode) (diary-mode))
871      (diary-unhide-everything)
872      (display-buffer (current-buffer)))))
873
874(defcustom diary-mail-addr
875  (if (boundp 'user-mail-address) user-mail-address "")
876  "Email address that `diary-mail-entries' will send email to."
877  :group 'diary
878  :type  'string
879  :version "20.3")
880
881(defcustom diary-mail-days 7
882  "Default number of days for `diary-mail-entries' to check."
883  :group 'diary
884  :type 'integer
885  :version "20.3")
886
887;;;###autoload
888(defun diary-mail-entries (&optional ndays)
889  "Send a mail message showing diary entries for next NDAYS days.
890If no prefix argument is given, NDAYS is set to `diary-mail-days'.
891Mail is sent to the address specified by `diary-mail-addr'.
892
893You can call `diary-mail-entries' every night using an at/cron job.
894For example, this script will run the program at 2am daily.  Since
895`emacs -batch' does not load your `.emacs' file, you must ensure that
896all relevant variables are set, as done here.
897
898#!/bin/sh
899# diary-rem.sh -- repeatedly run the Emacs diary-reminder
900emacs -batch \\
901-eval \"(setq diary-mail-days 3 \\
902             diary-file \\\"/path/to/diary.file\\\" \\
903             european-calendar-style t \\
904             diary-mail-addr \\\"user@host.name\\\" )\" \\
905-l diary-lib -f diary-mail-entries
906at -f diary-rem.sh 0200 tomorrow
907
908You may have to tweak the syntax of the `at' command to suit your
909system.  Alternatively, you can specify a cron entry:
9100 1 * * * diary-rem.sh
911to run it every morning at 1am."
912  (interactive "P")
913  (if (string-equal diary-mail-addr "")
914      (error "You must set `diary-mail-addr' to use this command")
915    (let ((diary-display-hook 'fancy-diary-display))
916      (diary-list-entries (calendar-current-date) (or ndays diary-mail-days)))
917    (compose-mail diary-mail-addr
918                  (concat "Diary entries generated "
919                          (calendar-date-string (calendar-current-date))))
920    (insert
921     (if (get-buffer fancy-diary-buffer)
922         (with-current-buffer fancy-diary-buffer (buffer-string))
923       "No entries found"))
924    (call-interactively (get mail-user-agent 'sendfunc))))
925
926(defun diary-name-pattern (string-array &optional abbrev-array paren)
927  "Return a regexp matching the strings in the array STRING-ARRAY.
928If the optional argument ABBREV-ARRAY is present, then the function
929`calendar-abbrev-construct' is used to construct abbreviations from the
930two supplied arrays. The returned regexp will then also match these
931abbreviations, with or without final `.' characters.  If the optional
932argument PAREN is non-nil, the regexp is surrounded by parentheses."
933  (regexp-opt (append string-array
934                      (if abbrev-array
935                          (calendar-abbrev-construct abbrev-array
936                                                     string-array))
937                      (if abbrev-array
938                          (calendar-abbrev-construct abbrev-array
939                                                     string-array
940                                                     'period))
941                      nil)
942              paren))
943
944(defvar marking-diary-entries nil
945  "True during the marking of diary entries, nil otherwise.")
946
947(defvar marking-diary-entry nil
948  "True during the marking of diary entries, if current entry is marking.")
949
950(defun mark-diary-entries (&optional redraw)
951  "Mark days in the calendar window that have diary entries.
952Each entry in the diary file visible in the calendar window is
953marked.  After the entries are marked, the hooks
954`nongregorian-diary-marking-hook' and `mark-diary-entries-hook'
955are run.  If the optional argument REDRAW is non-nil (which is
956the case interactively, for example) then any existing diary
957marks are first removed.  This is intended to deal with deleted
958diary entries."
959  (interactive "p")
960  ;; To remove any deleted diary entries. Do not redraw when:
961  ;; i) processing #include diary files (else only get the marks from
962  ;; the last #include file processed).
963  ;; ii) called via calendar-redraw (since calendar has already been
964  ;; erased).
965  ;; Use of REDRAW handles both of these cases.
966  (when (and redraw mark-diary-entries-in-calendar)
967    (setq mark-diary-entries-in-calendar nil)
968    (redraw-calendar))
969  (let ((marking-diary-entries t)
970        file-glob-attrs marks)
971    (with-current-buffer (find-file-noselect (diary-check-diary-file) t)
972      (save-excursion
973        (when (eq major-mode default-major-mode) (diary-mode))
974        (setq mark-diary-entries-in-calendar t)
975        (message "Marking diary entries...")
976        (setq file-glob-attrs (nth 1 (diary-pull-attrs nil '())))
977        (with-syntax-table diary-syntax-table
978          (dolist (date-form diary-date-forms)
979            (if (eq (car date-form) 'backup)
980                (setq date-form (cdr date-form))) ;; ignore 'backup directive
981            (let* ((dayname
982                    (diary-name-pattern calendar-day-name-array
983                                        calendar-day-abbrev-array))
984                   (monthname
985                    (format "%s\\|\\*"
986                            (diary-name-pattern calendar-month-name-array
987                                                calendar-month-abbrev-array)))
988                   (month "[0-9]+\\|\\*")
989                   (day "[0-9]+\\|\\*")
990                   (year "[0-9]+\\|\\*")
991                   (l (length date-form))
992                   (d-name-pos (- l (length (memq 'dayname date-form))))
993                   (d-name-pos (if (/= l d-name-pos) (+ 2 d-name-pos)))
994                   (m-name-pos (- l (length (memq 'monthname date-form))))
995                   (m-name-pos (if (/= l m-name-pos) (+ 2 m-name-pos)))
996                   (d-pos (- l (length (memq 'day date-form))))
997                   (d-pos (if (/= l d-pos) (+ 2 d-pos)))
998                   (m-pos (- l (length (memq 'month date-form))))
999                   (m-pos (if (/= l m-pos) (+ 2 m-pos)))
1000                   (y-pos (- l (length (memq 'year date-form))))
1001                   (y-pos (if (/= l y-pos) (+ 2 y-pos)))
1002                   (regexp
1003                    (concat
1004                     "\\(\\`\\|\^M\\|\n\\)\\("
1005                     (mapconcat 'eval date-form "\\)\\(")
1006                     "\\)"))
1007                   (case-fold-search t))
1008              (goto-char (point-min))
1009              (while (re-search-forward regexp nil t)
1010                (let* ((dd-name
1011                        (if d-name-pos
1012                            (match-string-no-properties d-name-pos)))
1013                       (mm-name
1014                        (if m-name-pos
1015                            (match-string-no-properties m-name-pos)))
1016                       (mm (string-to-number
1017                            (if m-pos
1018                                (match-string-no-properties m-pos)
1019                              "")))
1020                       (dd (string-to-number
1021                            (if d-pos
1022                                (match-string-no-properties d-pos)
1023                              "")))
1024                       (y-str (if y-pos
1025                                  (match-string-no-properties y-pos)))
1026                       (yy (if (not y-str)
1027                               0
1028                             (if (and (= (length y-str) 2)
1029                                      abbreviated-calendar-year)
1030                                 (let* ((current-y
1031                                         (extract-calendar-year
1032                                          (calendar-current-date)))
1033                                        (y (+ (string-to-number y-str)
1034                                              (* 100
1035                                                 (/ current-y 100)))))
1036                                   (if (> (- y current-y) 50)
1037                                       (- y 100)
1038                                     (if (> (- current-y y) 50)
1039                                         (+ y 100)
1040                                       y)))
1041                               (string-to-number y-str)))))
1042                  (let ((tmp (diary-pull-attrs (buffer-substring-no-properties
1043                                                (point) (line-end-position))
1044                                               file-glob-attrs)))
1045                    (setq entry (nth 0 tmp)
1046                          marks (nth 1 tmp)))
1047                  (if dd-name
1048                      (mark-calendar-days-named
1049                       (cdr (assoc-string
1050                             dd-name
1051                             (calendar-make-alist
1052                              calendar-day-name-array
1053                              0 nil calendar-day-abbrev-array) t)) marks)
1054                    (if mm-name
1055                        (setq mm
1056                              (if (string-equal mm-name "*") 0
1057                                (cdr (assoc-string
1058                                      mm-name
1059                                      (calendar-make-alist
1060                                       calendar-month-name-array
1061                                       1 nil calendar-month-abbrev-array) t)))))
1062                    (mark-calendar-date-pattern mm dd yy marks))))))
1063          (mark-sexp-diary-entries)
1064          (run-hooks 'nongregorian-diary-marking-hook
1065                     'mark-diary-entries-hook))
1066        (message "Marking diary entries...done")))))
1067
1068(defun mark-sexp-diary-entries ()
1069  "Mark days in the calendar window that have sexp diary entries.
1070Each entry in the diary file (or included files) visible in the calendar window
1071is marked.  See the documentation for the function `list-sexp-diary-entries'."
1072  (let* ((sexp-mark (regexp-quote sexp-diary-entry-symbol))
1073         (s-entry (concat "\\(\\`\\|\^M\\|\n\\)\\("
1074                          sexp-mark "(\\)\\|\\("
1075                          (regexp-quote diary-nonmarking-symbol)
1076                          sexp-mark "(diary-remind\\)"))
1077         (file-glob-attrs (nth 1 (diary-pull-attrs nil '())))
1078         m y first-date last-date mark file-glob-attrs)
1079    (with-current-buffer calendar-buffer
1080      (setq m displayed-month)
1081      (setq y displayed-year))
1082    (increment-calendar-month m y -1)
1083    (setq first-date
1084          (calendar-absolute-from-gregorian (list m 1 y)))
1085    (increment-calendar-month m y 2)
1086    (setq last-date
1087          (calendar-absolute-from-gregorian
1088           (list m (calendar-last-day-of-month m y) y)))
1089    (goto-char (point-min))
1090    (while (re-search-forward s-entry nil t)
1091      (setq marking-diary-entry (char-equal (preceding-char) ?\())
1092      (re-search-backward "(")
1093      (let ((sexp-start (point))
1094            sexp entry entry-start line-start marks)
1095        (forward-sexp)
1096        (setq sexp (buffer-substring-no-properties sexp-start (point)))
1097        (save-excursion
1098          (re-search-backward "\^M\\|\n\\|\\`")
1099          (setq line-start (point)))
1100        (forward-char 1)
1101        (if (and (or (char-equal (preceding-char) ?\^M)
1102                     (char-equal (preceding-char) ?\n))
1103                 (not (looking-at " \\|\^I")))
1104            (progn;; Diary entry consists only of the sexp
1105              (backward-char 1)
1106              (setq entry ""))
1107          (setq entry-start (point))
1108          ;; Find end of entry
1109          (re-search-forward "\^M\\|\n" nil t)
1110          (while (looking-at " \\|\^I")
1111 	    (or (re-search-forward "\^M\\|\n" nil t)
1112 		(re-search-forward "$" nil t)))
1113          (if (or (char-equal (preceding-char) ?\^M)
1114 		  (char-equal (preceding-char) ?\n))
1115 	      (backward-char 1))
1116          (setq entry (buffer-substring-no-properties entry-start (point)))
1117          (while (string-match "[\^M]" entry)
1118            (aset entry (match-beginning 0) ?\n )))
1119        (calendar-for-loop date from first-date to last-date do
1120          (if (setq mark (diary-sexp-entry sexp entry
1121                                (calendar-gregorian-from-absolute date)))
1122	      (progn
1123		(setq marks (diary-pull-attrs entry file-glob-attrs)
1124		      marks (nth 1 (diary-pull-attrs entry file-glob-attrs)))
1125		(mark-visible-calendar-date
1126		 (calendar-gregorian-from-absolute date)
1127		 (if (< 0 (length marks))
1128		     marks
1129		   (if (consp mark)
1130		     (car mark)))))))))))
1131
1132(defun mark-included-diary-files ()
1133  "Mark the diary entries from other diary files with those of the diary file.
1134This function is suitable for use as the `mark-diary-entries-hook'; it enables
1135you to use shared diary files together with your own.  The files included are
1136specified in the diary-file by lines of this form:
1137        #include \"filename\"
1138This is recursive; that is, #include directives in diary files thus included
1139are obeyed.  You can change the `#include' to some other string by
1140changing the variable `diary-include-string'."
1141  (goto-char (point-min))
1142  (while (re-search-forward
1143          (concat
1144           "\\(?:\\`\\|\^M\\|\n\\)"
1145           (regexp-quote diary-include-string)
1146           " \"\\([^\"]*\\)\"")
1147          nil t)
1148    (let* ((diary-file (substitute-in-file-name
1149                        (match-string-no-properties 1)))
1150           (mark-diary-entries-hook 'mark-included-diary-files)
1151           (dbuff (find-buffer-visiting diary-file)))
1152      (if (file-exists-p diary-file)
1153          (if (file-readable-p diary-file)
1154              (progn
1155                (mark-diary-entries)
1156                (unless dbuff
1157                  (kill-buffer (find-buffer-visiting diary-file))))
1158            (beep)
1159            (message "Can't read included diary file %s" diary-file)
1160            (sleep-for 2))
1161        (beep)
1162        (message "Can't find included diary file %s" diary-file)
1163        (sleep-for 2))))
1164  (goto-char (point-min)))
1165
1166(defun mark-calendar-days-named (dayname &optional color)
1167  "Mark all dates in the calendar window that are day DAYNAME of the week.
11680 means all Sundays, 1 means all Mondays, and so on."
1169  (with-current-buffer calendar-buffer
1170    (let ((prev-month displayed-month)
1171          (prev-year displayed-year)
1172          (succ-month displayed-month)
1173          (succ-year displayed-year)
1174          (last-day)
1175          (day))
1176      (increment-calendar-month succ-month succ-year 1)
1177      (increment-calendar-month prev-month prev-year -1)
1178      (setq day (calendar-absolute-from-gregorian
1179                 (calendar-nth-named-day 1 dayname prev-month prev-year)))
1180      (setq last-day (calendar-absolute-from-gregorian
1181                 (calendar-nth-named-day -1 dayname succ-month succ-year)))
1182      (while (<= day last-day)
1183        (mark-visible-calendar-date (calendar-gregorian-from-absolute day) color)
1184        (setq day (+ day 7))))))
1185
1186(defun mark-calendar-date-pattern (month day year &optional color)
1187  "Mark all dates in the calendar window that conform to MONTH/DAY/YEAR.
1188A value of 0 in any position is a wildcard."
1189  (with-current-buffer calendar-buffer
1190    (let ((m displayed-month)
1191          (y displayed-year))
1192      (increment-calendar-month m y -1)
1193      (calendar-for-loop i from 0 to 2 do
1194          (mark-calendar-month m y month day year color)
1195          (increment-calendar-month m y 1)))))
1196
1197(defun mark-calendar-month (month year p-month p-day p-year &optional color)
1198  "Mark dates in the MONTH/YEAR that conform to pattern P-MONTH/P_DAY/P-YEAR.
1199A value of 0 in any position of the pattern is a wildcard."
1200  (if (or (and (= month p-month)
1201               (or (= p-year 0) (= year p-year)))
1202          (and (= p-month 0)
1203               (or (= p-year 0) (= year p-year))))
1204      (if (= p-day 0)
1205          (calendar-for-loop
1206              i from 1 to (calendar-last-day-of-month month year) do
1207            (mark-visible-calendar-date (list month i year) color))
1208        (mark-visible-calendar-date (list month p-day year) color))))
1209
1210(defun sort-diary-entries ()
1211  "Sort the list of diary entries by time of day."
1212  (setq diary-entries-list (sort diary-entries-list 'diary-entry-compare)))
1213
1214(defun diary-entry-compare (e1 e2)
1215  "Returns t if E1 is earlier than E2."
1216  (or (calendar-date-compare e1 e2)
1217      (and (calendar-date-equal (car e1) (car e2))
1218           (let* ((ts1 (cadr e1)) (t1 (diary-entry-time ts1))
1219                  (ts2 (cadr e2)) (t2 (diary-entry-time ts2)))
1220             (or (< t1 t2)
1221                 (and (= t1 t2)
1222                      (string-lessp ts1 ts2)))))))
1223
1224(defcustom diary-unknown-time
1225  -9999
1226  "Value returned by diary-entry-time when no time is found.
1227The default value -9999 causes entries with no recognizable time to be placed
1228before those with times; 9999 would place entries with no recognizable time
1229after those with times."
1230  :type 'integer
1231  :group 'diary
1232  :version "20.3")
1233
1234(defun diary-entry-time (s)
1235  "Return time at the beginning of the string S as a military-style integer.
1236For example, returns 1325 for 1:25pm.
1237
1238Returns `diary-unknown-time' (default value -9999) if no time is recognized.
1239The recognized forms are XXXX, X:XX, or XX:XX (military time), and XXam,
1240XXAM, XXpm, XXPM, XX:XXam, XX:XXAM XX:XXpm, or XX:XXPM.  A period (.) can
1241be used instead of a colon (:) to separate the hour and minute parts."
1242  (let ((case-fold-search nil))
1243    (cond ((string-match        ; Military time
1244	    "\\`[ \t\n\\^M]*\\([0-9]?[0-9]\\)[:.]?\\([0-9][0-9]\\)\\(\\>\\|[^ap]\\)"
1245            s)
1246	   (+ (* 100 (string-to-number (match-string 1 s)))
1247	      (string-to-number (match-string 2 s))))
1248	  ((string-match        ; Hour only  XXam or XXpm
1249	    "\\`[ \t\n\\^M]*\\([0-9]?[0-9]\\)\\([ap]\\)m\\>" s)
1250	   (+ (* 100 (% (string-to-number (match-string 1 s)) 12))
1251	      (if (equal ?a (downcase (aref s (match-beginning 2))))
1252		  0 1200)))
1253	  ((string-match        ; Hour and minute  XX:XXam or XX:XXpm
1254	    "\\`[ \t\n\\^M]*\\([0-9]?[0-9]\\)[:.]\\([0-9][0-9]\\)\\([ap]\\)m\\>" s)
1255	   (+ (* 100 (% (string-to-number (match-string 1 s)) 12))
1256	      (string-to-number (match-string 2 s))
1257	      (if (equal ?a (downcase (aref s (match-beginning 3))))
1258		  0 1200)))
1259	  (t diary-unknown-time)))) ; Unrecognizable
1260
1261;; Unrecognizable
1262
1263(defun list-sexp-diary-entries (date)
1264  "Add sexp entries for DATE from the diary file to `diary-entries-list'.
1265Also, Make them visible in the diary file.  Returns t if any entries were
1266found.
1267
1268Sexp diary entries must be prefaced by a `sexp-diary-entry-symbol' (normally
1269`%%').  The form of a sexp diary entry is
1270
1271                  %%(SEXP) ENTRY
1272
1273Both ENTRY and DATE are globally available when the SEXP is evaluated.  If the
1274SEXP yields the value nil, the diary entry does not apply.  If it yields a
1275non-nil value, ENTRY will be taken to apply to DATE; if the non-nil value is a
1276string, that string will be the diary entry in the fancy diary display.
1277
1278For example, the following diary entry will apply to the 21st of the month
1279if it is a weekday and the Friday before if the 21st is on a weekend:
1280
1281      &%%(let ((dayname (calendar-day-of-week date))
1282               (day (extract-calendar-day date)))
1283           (or
1284             (and (= day 21) (memq dayname '(1 2 3 4 5)))
1285             (and (memq day '(19 20)) (= dayname 5)))
1286         ) UIUC pay checks deposited
1287
1288A number of built-in functions are available for this type of diary entry:
1289
1290      %%(diary-date MONTH DAY YEAR &optional MARK) text
1291                  Entry applies if date is MONTH, DAY, YEAR if
1292                  `european-calendar-style' is nil, and DAY, MONTH, YEAR if
1293                  `european-calendar-style' is t.  DAY, MONTH, and YEAR
1294                  can be lists of integers, the constant t, or an integer.
1295                  The constant t means all values.  An optional parameter
1296                  MARK specifies a face or single-character string to use
1297                  when highlighting the day in the calendar.
1298
1299      %%(diary-float MONTH DAYNAME N &optional DAY MARK) text
1300                  Entry will appear on the Nth DAYNAME of MONTH.
1301                  (DAYNAME=0 means Sunday, 1 means Monday, and so on;
1302                  if N is negative it counts backward from the end of
1303                  the month.  MONTH can be a list of months, a single
1304                  month, or t to specify all months. Optional DAY means
1305                  Nth DAYNAME of MONTH on or after/before DAY.  DAY defaults
1306                  to 1 if N>0 and the last day of the month if N<0.  An
1307                  optional parameter MARK specifies a face or single-character
1308                  string to use when highlighting the day in the calendar.
1309
1310      %%(diary-block M1 D1 Y1 M2 D2 Y2 &optional MARK) text
1311                  Entry will appear on dates between M1/D1/Y1 and M2/D2/Y2,
1312                  inclusive.  (If `european-calendar-style' is t, the
1313                  order of the parameters should be changed to D1, M1, Y1,
1314                  D2, M2, Y2.)  An optional parameter MARK specifies a face
1315                  or single-character string to use when highlighting the
1316                  day in the calendar.
1317
1318      %%(diary-anniversary MONTH DAY YEAR &optional MARK) text
1319                  Entry will appear on anniversary dates of MONTH DAY, YEAR.
1320                  (If `european-calendar-style' is t, the order of the
1321                  parameters should be changed to DAY, MONTH, YEAR.)  Text
1322                  can contain %d or %d%s; %d will be replaced by the number
1323                  of years since the MONTH DAY, YEAR and %s will be replaced
1324                  by the ordinal ending of that number (that is, `st', `nd',
1325                  `rd' or `th', as appropriate.  The anniversary of February
1326                  29 is considered to be March 1 in a non-leap year.  An
1327                  optional parameter MARK specifies a face or single-character
1328                  string to use when highlighting the day in the calendar.
1329
1330      %%(diary-cyclic N MONTH DAY YEAR &optional MARK) text
1331                  Entry will appear every N days, starting MONTH DAY, YEAR.
1332                  (If `european-calendar-style' is t, the order of the
1333                  parameters should be changed to N, DAY, MONTH, YEAR.)  Text
1334                  can contain %d or %d%s; %d will be replaced by the number
1335                  of repetitions since the MONTH DAY, YEAR and %s will
1336                  be replaced by the ordinal ending of that number (that is,
1337                  `st', `nd', `rd' or `th', as appropriate.  An optional
1338                  parameter MARK specifies a face or single-character string
1339                  to use when highlighting the day in the calendar.
1340
1341      %%(diary-remind SEXP DAYS &optional MARKING) text
1342                  Entry is a reminder for diary sexp SEXP.  DAYS is either a
1343                  single number or a list of numbers indicating the number(s)
1344                  of days before the event that the warning(s) should occur.
1345                  If the current date is (one of) DAYS before the event
1346                  indicated by EXPR, then a suitable message (as specified
1347                  by `diary-remind-message') appears.  In addition to the
1348                  reminders beforehand, the diary entry also appears on
1349                  the date itself.  If optional MARKING is non-nil then the
1350                  *reminders* are marked on the calendar.  Marking of
1351                  reminders is independent of whether the entry *itself* is
1352                  a marking or nonmarking one.
1353
1354      %%(diary-day-of-year)
1355                  Diary entries giving the day of the year and the number of
1356                  days remaining in the year will be made every day.  Note
1357                  that since there is no text, it makes sense only if the
1358                  fancy diary display is used.
1359
1360      %%(diary-iso-date)
1361                  Diary entries giving the corresponding ISO commercial date
1362                  will be made every day.  Note that since there is no text,
1363                  it makes sense only if the fancy diary display is used.
1364
1365      %%(diary-french-date)
1366                  Diary entries giving the corresponding French Revolutionary
1367                  date will be made every day.  Note that since there is no
1368                  text, it makes sense only if the fancy diary display is used.
1369
1370      %%(diary-islamic-date)
1371                  Diary entries giving the corresponding Islamic date will be
1372                  made every day.  Note that since there is no text, it
1373                  makes sense only if the fancy diary display is used.
1374
1375      %%(diary-hebrew-date)
1376                  Diary entries giving the corresponding Hebrew date will be
1377                  made every day.  Note that since there is no text, it
1378                  makes sense only if the fancy diary display is used.
1379
1380      %%(diary-astro-day-number) Diary entries giving the corresponding
1381                  astronomical (Julian) day number will be made every day.
1382                  Note that since there is no text, it makes sense only if the
1383                  fancy diary display is used.
1384
1385      %%(diary-julian-date) Diary entries giving the corresponding
1386                 Julian date will be made every day.  Note that since
1387                 there is no text, it makes sense only if the fancy diary
1388                 display is used.
1389
1390      %%(diary-sunrise-sunset)
1391                  Diary entries giving the local times of sunrise and sunset
1392                  will be made every day.  Note that since there is no text,
1393                  it makes sense only if the fancy diary display is used.
1394                  Floating point required.
1395
1396      %%(diary-phases-of-moon)
1397                  Diary entries giving the times of the phases of the moon
1398                  will be when appropriate.  Note that since there is no text,
1399                  it makes sense only if the fancy diary display is used.
1400                  Floating point required.
1401
1402      %%(diary-yahrzeit MONTH DAY YEAR) text
1403                  Text is assumed to be the name of the person; the date is
1404                  the date of death on the *civil* calendar.  The diary entry
1405                  will appear on the proper Hebrew-date anniversary and on the
1406                  day before.  (If `european-calendar-style' is t, the order
1407                  of the parameters should be changed to DAY, MONTH, YEAR.)
1408
1409      %%(diary-rosh-hodesh)
1410                  Diary entries will be made on the dates of Rosh Hodesh on
1411                  the Hebrew calendar.  Note that since there is no text, it
1412                  makes sense only if the fancy diary display is used.
1413
1414      %%(diary-parasha)
1415                  Diary entries giving the weekly parasha will be made on
1416                  every Saturday.  Note that since there is no text, it
1417                  makes sense only if the fancy diary display is used.
1418
1419      %%(diary-omer)
1420                  Diary entries giving the omer count will be made every day
1421                  from Passover to Shavuot.  Note that since there is no text,
1422                  it makes sense only if the fancy diary display is used.
1423
1424Marking these entries is *extremely* time consuming, so these entries are
1425best if they are nonmarking."
1426  (let ((s-entry (concat "\\(\\`\\|\^M\\|\n\\)"
1427                         (regexp-quote diary-nonmarking-symbol)
1428                         "?"
1429                         (regexp-quote sexp-diary-entry-symbol)
1430                         "("))
1431        entry-found file-glob-attrs marks)
1432    (goto-char (point-min))
1433    (save-excursion
1434      (setq file-glob-attrs (nth 1 (diary-pull-attrs nil '()))))
1435    (while (re-search-forward s-entry nil t)
1436      (backward-char 1)
1437      (let ((sexp-start (point))
1438            sexp entry specifier entry-start line-start)
1439        (forward-sexp)
1440        (setq sexp (buffer-substring-no-properties sexp-start (point)))
1441        (save-excursion
1442          (re-search-backward "\^M\\|\n\\|\\`")
1443          (setq line-start (point)))
1444        (setq specifier
1445              (buffer-substring-no-properties (1+ line-start) (point))
1446              entry-start (1+ line-start))
1447        (forward-char 1)
1448        (if (and (or (char-equal (preceding-char) ?\^M)
1449                     (char-equal (preceding-char) ?\n))
1450                 (not (looking-at " \\|\^I")))
1451            (progn;; Diary entry consists only of the sexp
1452              (backward-char 1)
1453              (setq entry ""))
1454          (setq entry-start (point))
1455          (re-search-forward "\^M\\|\n" nil t)
1456          (while (looking-at " \\|\^I")
1457            (re-search-forward "\^M\\|\n" nil t))
1458          (backward-char 1)
1459          (setq entry (buffer-substring-no-properties entry-start (point)))
1460          (while (string-match "[\^M]" entry)
1461            (aset entry (match-beginning 0) ?\n )))
1462        (let ((diary-entry (diary-sexp-entry sexp entry date))
1463              temp literal)
1464          (setq literal entry           ; before evaluation
1465                entry (if (consp diary-entry)
1466                          (cdr diary-entry)
1467                        diary-entry))
1468          (if diary-entry
1469              (progn
1470                (remove-overlays line-start (point) 'invisible 'diary)
1471                (if (< 0 (length entry))
1472                    (setq temp (diary-pull-attrs entry file-glob-attrs)
1473                          entry (nth 0 temp)
1474                          marks (nth 1 temp)))))
1475          (add-to-diary-list date
1476                             entry
1477                             specifier
1478                             (if entry-start (copy-marker entry-start)
1479                               nil)
1480                             marks
1481                             literal)
1482          (setq entry-found (or entry-found diary-entry)))))
1483    entry-found))
1484
1485(defun diary-sexp-entry (sexp entry date)
1486  "Process a SEXP diary ENTRY for DATE."
1487  (let ((result (if calendar-debug-sexp
1488                    (let ((stack-trace-on-error t))
1489                      (eval (car (read-from-string sexp))))
1490                  (condition-case nil
1491                      (eval (car (read-from-string sexp)))
1492                    (error
1493                     (beep)
1494                     (message "Bad sexp at line %d in %s: %s"
1495                              (count-lines (point-min) (point))
1496                              diary-file sexp)
1497                     (sleep-for 2))))))
1498    (cond ((stringp result) result)
1499	  ((and (consp result)
1500		(stringp (cdr result))) result)
1501	  (result entry)
1502          (t nil))))
1503
1504(defun diary-date (month day year &optional mark)
1505  "Specific date(s) diary entry.
1506Entry applies if date is MONTH, DAY, YEAR if `european-calendar-style' is nil,
1507and DAY, MONTH, YEAR if `european-calendar-style' is t.  DAY, MONTH, and YEAR
1508can be lists of integers, the constant t, or an integer.  The constant t means
1509all values.
1510
1511An optional parameter MARK specifies a face or single-character string to
1512use when highlighting the day in the calendar."
1513  (let ((dd (if european-calendar-style
1514                month
1515              day))
1516        (mm (if european-calendar-style
1517                day
1518              month))
1519        (m (extract-calendar-month date))
1520        (y (extract-calendar-year date))
1521        (d (extract-calendar-day date)))
1522    (if (and
1523         (or (and (listp dd) (memq d dd))
1524             (equal d dd)
1525             (eq dd t))
1526         (or (and (listp mm) (memq m mm))
1527             (equal m mm)
1528             (eq mm t))
1529         (or (and (listp year) (memq y year))
1530             (equal y year)
1531             (eq year t)))
1532        (cons mark entry))))
1533
1534(defun diary-block (m1 d1 y1 m2 d2 y2 &optional mark)
1535  "Block diary entry.
1536Entry applies if date is between, or on one of, two dates.
1537The order of the parameters is
1538M1, D1, Y1, M2, D2, Y2 if `european-calendar-style' is nil, and
1539D1, M1, Y1, D2, M2, Y2 if `european-calendar-style' is t.
1540
1541An optional parameter MARK specifies a face or single-character string to
1542use when highlighting the day in the calendar."
1543
1544  (let ((date1 (calendar-absolute-from-gregorian
1545                (if european-calendar-style
1546                    (list d1 m1 y1)
1547                  (list m1 d1 y1))))
1548        (date2 (calendar-absolute-from-gregorian
1549                (if european-calendar-style
1550                    (list d2 m2 y2)
1551                  (list m2 d2 y2))))
1552        (d (calendar-absolute-from-gregorian date)))
1553    (if (and (<= date1 d) (<= d date2))
1554        (cons mark entry))))
1555
1556(defun diary-float (month dayname n &optional day mark)
1557  "Floating diary entry--entry applies if date is the nth dayname of month.
1558Parameters are MONTH, DAYNAME, N.  MONTH can be a list of months, the constant
1559t, or an integer.  The constant t means all months.  If N is negative, count
1560backward from the end of the month.
1561
1562An optional parameter DAY means the Nth DAYNAME on or after/before MONTH DAY.
1563Optional MARK specifies a face or single-character string to use when
1564highlighting the day in the calendar."
1565;; This is messy because the diary entry may apply, but the date on which it
1566;; is based can be in a different month/year.  For example, asking for the
1567;; first Monday after December 30.  For large values of |n| the problem is
1568;; more grotesque.
1569  (and (= dayname (calendar-day-of-week date))
1570       (let* ((m (extract-calendar-month date))
1571              (d (extract-calendar-day date))
1572              (y (extract-calendar-year date))
1573              (limit; last (n>0) or first (n<0) possible base date for entry
1574               (calendar-nth-named-absday (- n) dayname m y d))
1575              (last-abs (if (> n 0) limit (+ limit 6)))
1576              (first-abs (if (> n 0) (- limit 6) limit))
1577              (last (calendar-gregorian-from-absolute last-abs))
1578              (first (calendar-gregorian-from-absolute first-abs))
1579              ; m1, d1 is first possible base date
1580              (m1 (extract-calendar-month first))
1581              (d1 (extract-calendar-day first))
1582              (y1 (extract-calendar-year first))
1583              ; m2, d2 is last possible base date
1584              (m2 (extract-calendar-month last))
1585              (d2 (extract-calendar-day last))
1586              (y2 (extract-calendar-year last)))
1587	 (if (or (and (= m1 m2)	; only possible base dates in one month
1588		      (or (eq month t)
1589			  (if (listp month)
1590                              (memq m1 month)
1591			    (= m1 month)))
1592		      (let ((d (or day (if (> n 0)
1593					   1
1594					 (calendar-last-day-of-month m1 y1)))))
1595			(and (<= d1 d) (<= d d2))))
1596		 ;; only possible base dates straddle two months
1597		 (and (or (< y1 y2)
1598 			  (and (= y1 y2) (< m1 m2)))
1599		      (or
1600		       ;; m1, d1 works as a base date
1601		       (and
1602			(or (eq month t)
1603			    (if (listp month)
1604                                (memq m1 month)
1605			      (= m1 month)))
1606			(<= d1 (or day (if (> n 0)
1607					   1
1608					 (calendar-last-day-of-month m1 y1)))))
1609		       ;; m2, d2 works as a base date
1610		       (and (or (eq month t)
1611				(if (listp month)
1612                                    (memq m2 month)
1613				  (= m2 month)))
1614			    (<= (or day (if (> n 0)
1615					    1
1616					  (calendar-last-day-of-month m2 y2)))
1617				d2)))))
1618	     (cons mark entry)))))
1619
1620
1621(defun diary-anniversary (month day &optional year mark)
1622  "Anniversary diary entry.
1623Entry applies if date is the anniversary of MONTH, DAY, YEAR if
1624`european-calendar-style' is nil, and DAY, MONTH, YEAR if
1625`european-calendar-style' is t.  Diary entry can contain `%d' or `%d%s'; the
1626%d will be replaced by the number of years since the MONTH DAY, YEAR and the
1627%s will be replaced by the ordinal ending of that number (that is, `st', `nd',
1628`rd' or `th', as appropriate.  The anniversary of February 29 is considered
1629to be March 1 in non-leap years.
1630
1631An optional parameter MARK specifies a face or single-character string to
1632use when highlighting the day in the calendar."
1633  (let* ((d (if european-calendar-style
1634                month
1635              day))
1636         (m (if european-calendar-style
1637                day
1638              month))
1639         (y (extract-calendar-year date))
1640         (diff (if year (- y year) 100)))
1641    (if (and (= m 2) (= d 29) (not (calendar-leap-year-p y)))
1642        (setq m 3
1643              d 1))
1644    (if (and (> diff 0) (calendar-date-equal (list m d y) date))
1645        (cons mark (format entry diff (diary-ordinal-suffix diff))))))
1646
1647(defun diary-cyclic (n month day year &optional mark)
1648  "Cycle diary entry--entry applies every N days starting at MONTH, DAY, YEAR.
1649If `european-calendar-style' is t, parameters are N, DAY, MONTH, YEAR.
1650ENTRY can contain `%d' or `%d%s'; the %d will be replaced by the number of
1651repetitions since the MONTH DAY, YEAR and %s will be replaced by the
1652ordinal ending of that number (that is, `st', `nd', `rd' or `th', as
1653appropriate.
1654
1655An optional parameter MARK specifies a face or single-character string to
1656use when highlighting the day in the calendar."
1657  (let* ((d (if european-calendar-style
1658                month
1659              day))
1660         (m (if european-calendar-style
1661                day
1662              month))
1663         (diff (- (calendar-absolute-from-gregorian date)
1664                  (calendar-absolute-from-gregorian
1665                   (list m d year))))
1666         (cycle (/ diff n)))
1667    (if (and (>= diff 0) (zerop (% diff n)))
1668        (cons mark (format entry cycle (diary-ordinal-suffix cycle))))))
1669
1670(defun diary-ordinal-suffix (n)
1671  "Ordinal suffix for N. (That is, `st', `nd', `rd', or `th', as appropriate.)"
1672  (if (or (memq (% n 100) '(11 12 13))
1673          (< 3 (% n 10)))
1674      "th"
1675    (aref ["th" "st" "nd" "rd"] (% n 10))))
1676
1677(defun diary-day-of-year ()
1678  "Day of year and number of days remaining in the year of date diary entry."
1679  (calendar-day-of-year-string date))
1680
1681(defcustom diary-remind-message
1682  '("Reminder: Only "
1683    (if (= 0 (% days 7))
1684        (concat (int-to-string (/ days 7)) (if (= 7 days) " week" " weeks"))
1685      (concat (int-to-string days) (if (= 1 days) " day" " days")))
1686    " until "
1687    diary-entry)
1688  "Pseudo-pattern giving form of reminder messages in the fancy diary
1689display.
1690
1691Used by the function `diary-remind', a pseudo-pattern is a list of
1692expressions that can involve the keywords `days' (a number), `date' (a list of
1693month, day, year), and `diary-entry' (a string)."
1694  :type 'sexp
1695  :group 'diary)
1696
1697(defun diary-remind (sexp days &optional marking)
1698  "Provide a reminder of a diary entry.
1699SEXP is a diary-sexp.  DAYS is either a single number or a list of numbers
1700indicating the number(s) of days before the event that the warning(s) should
1701occur on.  If the current date is (one of) DAYS before the event indicated by
1702SEXP, then a suitable message (as specified by `diary-remind-message' is
1703returned.
1704
1705In addition to the reminders beforehand, the diary entry also appears on the
1706date itself.
1707
1708A `diary-nonmarking-symbol' at the beginning of the line of the diary-remind
1709entry specifies that the diary entry (not the reminder) is non-marking.
1710Marking of reminders is independent of whether the entry itself is a marking
1711or nonmarking; if optional parameter MARKING is non-nil then the reminders are
1712marked on the calendar."
1713  (let ((diary-entry (eval sexp)))
1714    (cond
1715     ;; Diary entry applies on date
1716     ((and diary-entry
1717           (or (not marking-diary-entries) marking-diary-entry))
1718      diary-entry)
1719     ;; Diary entry may apply to `days' before date
1720     ((and (integerp days)
1721           (not diary-entry); Diary entry does not apply to date
1722           (or (not marking-diary-entries) marking))
1723      (let ((date (calendar-gregorian-from-absolute
1724                   (+ (calendar-absolute-from-gregorian date) days))))
1725        (when (setq diary-entry (eval sexp)) ; re-evaluate with adjusted date
1726          ;; Discard any mark portion from diary-anniversary, etc.
1727          (if (consp diary-entry) (setq diary-entry (cdr diary-entry)))
1728          (mapconcat 'eval diary-remind-message ""))))
1729     ;; Diary entry may apply to one of a list of days before date
1730     ((and (listp days) days)
1731      (or (diary-remind sexp (car days) marking)
1732          (diary-remind sexp (cdr days) marking))))))
1733
1734(defun diary-redraw-calendar ()
1735  "If `calendar-buffer' is live and diary entries are marked, redraw it."
1736  (and mark-diary-entries-in-calendar
1737       (save-excursion
1738         (redraw-calendar)))
1739  ;; Return value suitable for `write-contents-functions'.
1740  nil)
1741
1742(defun make-diary-entry (string &optional nonmarking file)
1743  "Insert a diary entry STRING which may be NONMARKING in FILE.
1744If omitted, NONMARKING defaults to nil and FILE defaults to
1745`diary-file'."
1746  (let ((pop-up-frames (window-dedicated-p (selected-window))))
1747    (find-file-other-window (substitute-in-file-name (or file diary-file))))
1748  (when (eq major-mode default-major-mode) (diary-mode))
1749  (widen)
1750  (diary-unhide-everything)
1751  (goto-char (point-max))
1752  (when (let ((case-fold-search t))
1753          (search-backward "Local Variables:"
1754                           (max (- (point-max) 3000) (point-min))
1755                           t))
1756    (beginning-of-line)
1757    (insert "\n")
1758    (forward-line -1))
1759  (insert
1760   (if (bolp) "" "\n")
1761   (if nonmarking diary-nonmarking-symbol "")
1762   string " "))
1763
1764(defun insert-diary-entry (arg)
1765  "Insert a diary entry for the date indicated by point.
1766Prefix arg will make the entry nonmarking."
1767  (interactive "P")
1768  (make-diary-entry (calendar-date-string (calendar-cursor-to-date t) t t)
1769                    arg))
1770
1771(defun insert-weekly-diary-entry (arg)
1772  "Insert a weekly diary entry for the day of the week indicated by point.
1773Prefix arg will make the entry nonmarking."
1774  (interactive "P")
1775  (make-diary-entry (calendar-day-name (calendar-cursor-to-date t))
1776                    arg))
1777
1778(defun insert-monthly-diary-entry (arg)
1779  "Insert a monthly diary entry for the day of the month indicated by point.
1780Prefix arg will make the entry nonmarking."
1781  (interactive "P")
1782  (let ((calendar-date-display-form
1783         (if european-calendar-style
1784             '(day " * ")
1785           '("* " day))))
1786    (make-diary-entry (calendar-date-string (calendar-cursor-to-date t) t)
1787                      arg)))
1788
1789(defun insert-yearly-diary-entry (arg)
1790  "Insert an annual diary entry for the day of the year indicated by point.
1791Prefix arg will make the entry nonmarking."
1792  (interactive "P")
1793  (let ((calendar-date-display-form
1794         (if european-calendar-style
1795             '(day " " monthname)
1796           '(monthname " " day))))
1797    (make-diary-entry (calendar-date-string (calendar-cursor-to-date t) t)
1798                      arg)))
1799
1800(defun insert-anniversary-diary-entry (arg)
1801  "Insert an anniversary diary entry for the date given by point.
1802Prefix arg will make the entry nonmarking."
1803  (interactive "P")
1804  (let ((calendar-date-display-form
1805         (if european-calendar-style
1806             '(day " " month " " year)
1807           '(month " " day " " year))))
1808    (make-diary-entry
1809     (format "%s(diary-anniversary %s)"
1810             sexp-diary-entry-symbol
1811             (calendar-date-string (calendar-cursor-to-date t) nil t))
1812     arg)))
1813
1814(defun insert-block-diary-entry (arg)
1815  "Insert a block diary entry for the days between the point and marked date.
1816Prefix arg will make the entry nonmarking."
1817  (interactive "P")
1818  (let ((calendar-date-display-form
1819         (if european-calendar-style
1820             '(day " " month " " year)
1821           '(month " " day " " year)))
1822         (cursor (calendar-cursor-to-date t))
1823         (mark (or (car calendar-mark-ring)
1824                   (error "No mark set in this buffer")))
1825         start end)
1826    (if (< (calendar-absolute-from-gregorian mark)
1827           (calendar-absolute-from-gregorian cursor))
1828        (setq start mark
1829              end cursor)
1830      (setq start cursor
1831              end mark))
1832    (make-diary-entry
1833     (format "%s(diary-block %s %s)"
1834      sexp-diary-entry-symbol
1835      (calendar-date-string start nil t)
1836      (calendar-date-string end nil t))
1837     arg)))
1838
1839(defun insert-cyclic-diary-entry (arg)
1840  "Insert a cyclic diary entry starting at the date given by point.
1841Prefix arg will make the entry nonmarking."
1842  (interactive "P")
1843  (let ((calendar-date-display-form
1844         (if european-calendar-style
1845             '(day " " month " " year)
1846           '(month " " day " " year))))
1847    (make-diary-entry
1848     (format "%s(diary-cyclic %d %s)"
1849             sexp-diary-entry-symbol
1850             (calendar-read "Repeat every how many days: "
1851                            (lambda (x) (> x 0)))
1852             (calendar-date-string (calendar-cursor-to-date t) nil t))
1853     arg)))
1854
1855(defvar diary-mode-map
1856  (let ((map (make-sparse-keymap)))
1857    (define-key map "\C-c\C-s" 'diary-show-all-entries)
1858    (define-key map "\C-c\C-q" 'quit-window)
1859    map)
1860  "Keymap for `diary-mode'.")
1861
1862;;;###autoload
1863(define-derived-mode diary-mode fundamental-mode "Diary"
1864  "Major mode for editing the diary file."
1865  (set (make-local-variable 'font-lock-defaults)
1866       '(diary-font-lock-keywords t))
1867  (add-to-invisibility-spec '(diary . nil))
1868  (add-hook 'after-save-hook 'diary-redraw-calendar nil t)
1869  (if diary-header-line-flag
1870      (setq header-line-format diary-header-line-format)))
1871
1872
1873(defvar diary-fancy-date-pattern
1874  (concat
1875   (let ((dayname (diary-name-pattern calendar-day-name-array nil t))
1876         (monthname (diary-name-pattern calendar-month-name-array nil t))
1877         (day "[0-9]+")
1878         (month "[0-9]+")
1879         (year "-?[0-9]+"))
1880     (mapconcat 'eval calendar-date-display-form ""))
1881   ;; Optional ": holiday name" after the date.
1882   "\\(: .*\\)?")
1883  "Regular expression matching a date header in Fancy Diary.")
1884
1885(defconst diary-time-regexp
1886  ;; Accepted formats: 10:00 10.00 10h00 10h 10am 10:00am 10.00am
1887  ;; Use of "." as a separator annoyingly matches numbers, eg "123.45".
1888  ;; Hence often prefix this with "\\(^\\|\\s-\\)."
1889  (concat "[0-9]?[0-9]\\([AaPp][mM]\\|\\("
1890          "[Hh]\\([0-9][0-9]\\)?\\|[:.][0-9][0-9]"
1891          "\\)\\([AaPp][Mm]\\)?\\)")
1892  "Regular expression matching a time of day.")
1893
1894(defface diary-anniversary '((t :inherit font-lock-keyword-face))
1895  "Face used for anniversaries in the diary."
1896  :version "22.1"
1897  :group 'diary)
1898
1899(defface diary-time '((t :inherit font-lock-variable-name-face))
1900  "Face used for times of day in the diary."
1901  :version "22.1"
1902  :group 'diary)
1903
1904(defvar fancy-diary-font-lock-keywords
1905  (list
1906   (list
1907    ;; Any number of " other holiday name" lines, followed by "==" line.
1908    (concat diary-fancy-date-pattern "\\(\n +.*\\)*\n=+$")
1909    '(0 (progn (put-text-property (match-beginning 0) (match-end 0)
1910                                  'font-lock-multiline t)
1911               diary-face)))
1912   '("^.*\\([aA]nniversary\\|[bB]irthday\\).*$" . 'diary-anniversary)
1913   '("^.*Yahrzeit.*$" . font-lock-reference-face)
1914   '("^\\(Erev \\)?Rosh Hodesh.*" . font-lock-function-name-face)
1915   '("^Day.*omer.*$" . font-lock-builtin-face)
1916   '("^Parashat.*$" . font-lock-comment-face)
1917   `(,(format "\\(^\\|\\s-\\)%s\\(-%s\\)?" diary-time-regexp
1918              diary-time-regexp) . 'diary-time))
1919  "Keywords to highlight in fancy diary display")
1920
1921;; If region looks like it might start or end in the middle of a
1922;; multiline pattern, extend the region to encompass the whole pattern.
1923(defun diary-fancy-font-lock-fontify-region-function (beg end &optional verbose)
1924  "Function to use for `font-lock-fontify-region-function' in Fancy Diary.
1925Needed to handle multiline keyword in `fancy-diary-font-lock-keywords'."
1926  (goto-char beg)
1927  (forward-line 0)
1928  (if (looking-at "=+$") (forward-line -1))
1929  (while (and (looking-at " +[^ ]")
1930              (zerop (forward-line -1))))
1931  ;; This check not essential.
1932  (if (looking-at diary-fancy-date-pattern)
1933      (setq beg (line-beginning-position)))
1934  (goto-char end)
1935  (forward-line 0)
1936  (while (and (looking-at " +[^ ]")
1937              (zerop (forward-line 1))))
1938  (if (looking-at "=+$")
1939      (setq end (line-beginning-position 2)))
1940  (font-lock-default-fontify-region beg end verbose))
1941
1942(define-derived-mode fancy-diary-display-mode fundamental-mode
1943  "Diary"
1944  "Major mode used while displaying diary entries using Fancy Display."
1945  (set (make-local-variable 'font-lock-defaults)
1946       '(fancy-diary-font-lock-keywords
1947         t nil nil nil
1948         (font-lock-fontify-region-function
1949          . diary-fancy-font-lock-fontify-region-function)))
1950  (local-set-key "q" 'quit-window))
1951
1952
1953(defun diary-font-lock-sexps (limit)
1954  "Recognize sexp diary entry for font-locking."
1955  (if (re-search-forward
1956       (concat "^" (regexp-quote diary-nonmarking-symbol)
1957               "?\\(" (regexp-quote sexp-diary-entry-symbol) "\\)")
1958       limit t)
1959      (condition-case nil
1960	  (save-restriction
1961	    (narrow-to-region (point-min) limit)
1962	    (let ((start (point)))
1963	      (forward-sexp 1)
1964	      (store-match-data (list start (point)))
1965	      t))
1966	(error t))))
1967
1968(defun diary-font-lock-date-forms (month-array &optional symbol abbrev-array)
1969  "Create font-lock patterns for `diary-date-forms' using MONTH-ARRAY.
1970If given, optional SYMBOL must be a prefix to entries.
1971If optional ABBREV-ARRAY is present, the abbreviations constructed
1972from this array by the function `calendar-abbrev-construct' are
1973matched (with or without a final `.'), in addition to the full month
1974names."
1975  (let ((dayname (diary-name-pattern calendar-day-name-array
1976                                     calendar-day-abbrev-array t))
1977        (monthname (format "\\(%s\\|\\*\\)"
1978                           (diary-name-pattern month-array abbrev-array)))
1979        (month "\\([0-9]+\\|\\*\\)")
1980        (day "\\([0-9]+\\|\\*\\)")
1981        (year "-?\\([0-9]+\\|\\*\\)"))
1982    (mapcar (lambda (x)
1983               (cons
1984                (concat "^" (regexp-quote diary-nonmarking-symbol) "?"
1985                        (if symbol (regexp-quote symbol) "") "\\("
1986                        (mapconcat 'eval
1987                                   ;; If backup, omit first item (backup)
1988                                   ;; and last item (not part of date)
1989                                   (if (equal (car x) 'backup)
1990                                      (nreverse (cdr (reverse (cdr x))))
1991                                     x)
1992                                   "")
1993                        ;; With backup, last item is not part of date
1994                        (if (equal (car x) 'backup)
1995                            (concat "\\)" (eval (car (reverse x))))
1996                          "\\)"))
1997                '(1 diary-face)))
1998            diary-date-forms)))
1999
2000(eval-when-compile (require 'cal-hebrew)
2001                   (require 'cal-islam))
2002
2003(defun diary-font-lock-keywords ()
2004  "Return a value for the variable `diary-font-lock-keywords'."
2005  (append
2006   (diary-font-lock-date-forms calendar-month-name-array
2007                               nil calendar-month-abbrev-array)
2008   (when (or (memq 'mark-hebrew-diary-entries
2009                   nongregorian-diary-marking-hook)
2010             (memq 'list-hebrew-diary-entries
2011                   nongregorian-diary-listing-hook))
2012     (require 'cal-hebrew)
2013     (diary-font-lock-date-forms
2014      calendar-hebrew-month-name-array-leap-year
2015      hebrew-diary-entry-symbol))
2016   (when (or (memq 'mark-islamic-diary-entries
2017                   nongregorian-diary-marking-hook)
2018             (memq 'list-islamic-diary-entries
2019                   nongregorian-diary-listing-hook))
2020     (require 'cal-islam)
2021     (diary-font-lock-date-forms
2022      calendar-islamic-month-name-array
2023      islamic-diary-entry-symbol))
2024   (list
2025    (cons
2026     (concat "^" (regexp-quote diary-include-string) ".*$")
2027     'font-lock-keyword-face)
2028    (cons
2029     (concat "^" (regexp-quote diary-nonmarking-symbol)
2030             "?\\(" (regexp-quote sexp-diary-entry-symbol) "\\)")
2031     '(1 font-lock-reference-face))
2032    (cons
2033     (concat "^" (regexp-quote diary-nonmarking-symbol))
2034     'font-lock-reference-face)
2035    (cons
2036     (concat "^" (regexp-quote diary-nonmarking-symbol)
2037             "?\\(" (regexp-quote hebrew-diary-entry-symbol) "\\)")
2038     '(1 font-lock-reference-face))
2039    (cons
2040     (concat "^" (regexp-quote diary-nonmarking-symbol)
2041             "?\\(" (regexp-quote islamic-diary-entry-symbol) "\\)")
2042     '(1 font-lock-reference-face))
2043    '(diary-font-lock-sexps . font-lock-keyword-face)
2044    `(,(concat "\\(^\\|\\s-\\)"
2045               diary-time-regexp "\\(-" diary-time-regexp "\\)?")
2046      . 'diary-time))))
2047
2048(defvar diary-font-lock-keywords (diary-font-lock-keywords)
2049  "Forms to highlight in `diary-mode'.")
2050
2051;; Following code from Dave Love <fx@gnu.org>.
2052;; Import Outlook-format appointments from mail messages in Gnus or
2053;; Rmail using command `diary-from-outlook'.  This, or the specialized
2054;; functions `diary-from-outlook-gnus' and `diary-from-outlook-rmail',
2055;; could be run from hooks to notice appointments automatically (in
2056;; which case they will prompt about adding to the diary).  The
2057;; message formats recognized are customizable through
2058;; `diary-outlook-formats'.
2059
2060(defcustom diary-outlook-formats
2061  '(
2062    ;; When: 11 October 2001 12:00-14:00 (GMT) Greenwich Mean Time : Dublin, ...
2063    ;; [Current UK format?  The timezone is meaningless.  Sometimes the
2064    ;; Where is missing.]
2065    ("When: \\([0-9]+ [[:alpha:]]+ [0-9]+\\) \
2066\\([^ ]+\\) [^\n]+
2067\[^\n]+
2068\\(?:Where: \\([^\n]+\\)\n+\\)?
2069\\*~\\*~\\*~\\*~\\*~\\*~\\*~\\*~\\*~\\*"
2070     . "\\1\n \\2 %s, \\3")
2071    ;; When: Tuesday, April 30, 2002 03:00 PM-03:30 PM (GMT) Greenwich Mean ...
2072    ;; [Old UK format?]
2073    ("^When: [[:alpha:]]+, \\([[:alpha:]]+\\) \\([0-9][0-9]*\\), \\([0-9]\\{4\\}\\) \
2074\\([^ ]+\\) [^\n]+
2075\[^\n]+
2076\\(?:Where: \\([^\n]+\\)\\)?\n+"
2077     . "\\2 \\1 \\3\n \\4 %s, \\5")
2078    (
2079     ;; German format, apparently.
2080     "^Zeit: [^ ]+, +\\([0-9]+\\)\. +\\([[:upper:]][[:lower:]][[:lower:]]\\)[^ ]* +\\([0-9]+\\) +\\([^ ]+\\).*$"
2081     . "\\1 \\2 \\3\n \\4 %s"))
2082  "Alist of regexps matching message text and replacement text.
2083
2084The regexp must match the start of the message text containing an
2085appointment, but need not include a leading `^'.  If it matches the
2086current message, a diary entry is made from the corresponding
2087template.  If the template is a string, it should be suitable for
2088passing to `replace-match', and so will have occurrences of `\\D' to
2089substitute the match for the Dth subexpression.  It must also contain
2090a single `%s' which will be replaced with the text of the message's
2091Subject field.  Any other `%' characters must be doubled, so that the
2092template can be passed to `format'.
2093
2094If the template is actually a function, it is called with the message
2095body text as argument, and may use `match-string' etc. to make a
2096template following the rules above."
2097  :type '(alist :key-type (regexp :tag "Regexp matching time/place")
2098		:value-type (choice
2099			     (string :tag "Template for entry")
2100			     (function :tag "Unary function providing template")))
2101  :version "22.1"
2102  :group 'diary)
2103
2104
2105;; Dynamically bound.
2106(defvar body)
2107(defvar subject)
2108
2109(defun diary-from-outlook-internal (&optional test-only)
2110  "Snarf a diary entry from a message assumed to be from MS Outlook.
2111Assumes `body' is bound to a string comprising the body of the message and
2112`subject' is bound to a string comprising its subject.
2113Arg TEST-ONLY non-nil means return non-nil if and only if the
2114message contains an appointment, don't make a diary entry."
2115  (catch 'finished
2116    (let (format-string)
2117      (dotimes (i (length diary-outlook-formats))
2118	(when (eq 0 (string-match (car (nth i diary-outlook-formats))
2119				  body))
2120	  (unless test-only
2121	    (setq format-string (cdr (nth i diary-outlook-formats)))
2122	    (save-excursion
2123	      (save-window-excursion
2124		;; Fixme: References to optional fields in the format
2125		;; are treated literally, not replaced by the empty
2126		;; string.  I think this is an Emacs bug.
2127		(make-diary-entry
2128		 (format (replace-match (if (functionp format-string)
2129					    (funcall format-string body)
2130					  format-string)
2131					t nil (match-string 0 body))
2132			 subject))
2133		(save-buffer))))
2134	  (throw 'finished t))))
2135    nil))
2136
2137(defun diary-from-outlook (&optional noconfirm)
2138  "Maybe snarf diary entry from current Outlook-generated message.
2139Currently knows about Gnus and Rmail modes.  Unless the optional
2140argument NOCONFIRM is non-nil (which is the case when this
2141function is called interactively), then if an entry is found the
2142user is asked to confirm its addition."
2143  (interactive "p")
2144  (let ((func (cond
2145	       ((eq major-mode 'rmail-mode)
2146		#'diary-from-outlook-rmail)
2147	       ((memq major-mode '(gnus-summary-mode gnus-article-mode))
2148		#'diary-from-outlook-gnus)
2149	       (t (error "Don't know how to snarf in `%s'" major-mode)))))
2150    (funcall func noconfirm)))
2151
2152
2153(defvar gnus-article-mime-handles)
2154(defvar gnus-article-buffer)
2155
2156(autoload 'gnus-fetch-field "gnus-util")
2157(autoload 'gnus-narrow-to-body "gnus")
2158(autoload 'mm-get-part "mm-decode")
2159
2160(defun diary-from-outlook-gnus (&optional noconfirm)
2161  "Maybe snarf diary entry from Outlook-generated message in Gnus.
2162Unless the optional argument NOCONFIRM is non-nil (which is the case when
2163this function is called interactively), then if an entry is found the
2164user is asked to confirm its addition.
2165Add this function to `gnus-article-prepare-hook' to notice appointments
2166automatically."
2167  (interactive "p")
2168  (with-current-buffer gnus-article-buffer
2169    (let ((subject (gnus-fetch-field "subject"))
2170	  (body (if gnus-article-mime-handles
2171		    ;; We're multipart.  Don't get confused by part
2172		    ;; buttons &c.  Assume info is in first part.
2173		    (mm-get-part (nth 1 gnus-article-mime-handles))
2174		  (save-restriction
2175		    (gnus-narrow-to-body)
2176		    (buffer-string)))))
2177      (when (diary-from-outlook-internal t)
2178	(when (or noconfirm (y-or-n-p "Snarf diary entry? "))
2179	  (diary-from-outlook-internal)
2180	  (message "Diary entry added"))))))
2181
2182(custom-add-option 'gnus-article-prepare-hook 'diary-from-outlook-gnus)
2183
2184
2185(defvar rmail-buffer)
2186
2187(defun diary-from-outlook-rmail (&optional noconfirm)
2188  "Maybe snarf diary entry from Outlook-generated message in Rmail.
2189Unless the optional argument NOCONFIRM is non-nil (which is the case when
2190this function is called interactively), then if an entry is found the
2191user is asked to confirm its addition."
2192  (interactive "p")
2193  (with-current-buffer rmail-buffer
2194    (let ((subject (mail-fetch-field "subject"))
2195	  (body (buffer-substring (save-excursion
2196				    (rfc822-goto-eoh)
2197				    (point))
2198				  (point-max))))
2199      (when (diary-from-outlook-internal t)
2200	(when (or noconfirm (y-or-n-p "Snarf diary entry? "))
2201	  (diary-from-outlook-internal)
2202	  (message "Diary entry added"))))))
2203
2204
2205(provide 'diary-lib)
2206
2207;; arch-tag: 22dd506e-2e33-410d-9ae1-095a0c1b2010
2208;;; diary-lib.el ends here
2209