(diary-display-function): New name for diary-display-hook. Keep old
[bpt/emacs.git] / lisp / calendar / appt.el
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55535639 1;;; appt.el --- appointment notification functions
c0274f38 2
a20b3848 3;; Copyright (C) 1989, 1990, 1994, 1998, 2001, 2002, 2003, 2004, 2005,
8b72699e 4;; 2006, 2007, 2008 Free Software Foundation, Inc.
3a801d0c 5
e5167999 6;; Author: Neil Mager <neilm@juliet.ll.mit.edu>
aff88519 7;; Maintainer: Glenn Morris <rgm@gnu.org>
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8;; Keywords: calendar
9
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10;; This file is part of GNU Emacs.
11
2ed66575 12;; GNU Emacs is free software: you can redistribute it and/or modify
902a0e3c 13;; it under the terms of the GNU General Public License as published by
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14;; the Free Software Foundation, either version 3 of the License, or
15;; (at your option) any later version.
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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
2ed66575 23;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
902a0e3c 24
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25;;; Commentary:
26
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27;;
28;; appt.el - visible and/or audible notification of
8d638c1b 29;; appointments from diary file.
902a0e3c 30;;
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31;;
32;; Thanks to Edward M. Reingold for much help and many suggestions,
33;; And to many others for bug fixes and suggestions.
34;;
35;;
36;; This functions in this file will alert the user of a
37;; pending appointment based on his/her diary file. This package
38;; is documented in the Emacs manual.
39;;
40;; To activate this package, simply use (appt-activate 1).
41;; A `diary-file' with appointments of the format described in the
42;; documentation of the function `appt-check' is required.
43;; Relevant customizable variables are also listed in the
44;; documentation of that function.
45;;
46;; Today's appointment list is initialized from the diary when this
47;; package is activated. Additionally, the appointments list is
48;; recreated automatically at 12:01am for those who do not logout
49;; every day or are programming late. It is also updated when the
50;; `diary-file' is saved. Calling `appt-check' with an argument forces
51;; a re-initialization at any time.
52;;
53;; In order to add or delete items from today's list, without
54;; changing the diary file, use `appt-add' and `appt-delete'.
55;;
56
57;; Brief internal description - Skip this if you are not interested!
58;;
59;; The function `appt-make-list' creates the appointments list which
60;; `appt-check' reads.
61;;
62;; You can change the way the appointment window is created/deleted by
63;; setting the variables
64;;
debf91fd 65;; appt-disp-window-function
e1422141 66;; and
debf91fd 67;; appt-delete-window-function
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68;;
69;; For instance, these variables could be set to functions that display
70;; appointments in pop-up frames, which are lowered or iconified after
71;; `appt-display-interval' minutes.
72;;
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73
74;;; Code:
75
467f174b 76(require 'diary-lib)
6afadb57 77
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78
79(defgroup appt nil
80 "Appointment notification."
467f174b 81 :prefix "appt-"
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82 :group 'calendar)
83
30e8032d 84(defcustom appt-issue-message t
40f79f5b 85 "Non-nil means check for appointments in the diary buffer.
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86To be detected, the diary entry must have the format described in the
87documentation of the function `appt-check'."
88 :type 'boolean
89 :group 'appt)
90
91(make-obsolete-variable 'appt-issue-message
92 "use the function `appt-activate', and the \
bf247b6e 93variable `appt-display-format' instead." "22.1")
30e8032d 94
8db540c5 95(defcustom appt-message-warning-time 12
40f79f5b 96 "Time in minutes before an appointment that the warning begins."
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97 :type 'integer
98 :group 'appt)
902a0e3c 99
8db540c5 100(defcustom appt-audible t
40f79f5b 101 "Non-nil means beep to indicate appointment."
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102 :type 'boolean
103 :group 'appt)
902a0e3c 104
8db540c5 105(defcustom appt-visible t
40f79f5b 106 "Non-nil means display appointment message in echo area.
8d638c1b 107This variable is only relevant if `appt-msg-window' is nil."
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108 :type 'boolean
109 :group 'appt)
902a0e3c 110
bf247b6e 111(make-obsolete-variable 'appt-visible 'appt-display-format "22.1")
8d638c1b 112
8d638c1b 113(defcustom appt-msg-window t
40f79f5b 114 "Non-nil means display appointment message in another window.
8d638c1b 115If non-nil, this variable overrides `appt-visible'."
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116 :type 'boolean
117 :group 'appt)
902a0e3c 118
bf247b6e 119(make-obsolete-variable 'appt-msg-window 'appt-display-format "22.1")
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120
121;; TODO - add popup.
a19de628 122(defcustom appt-display-format 'ignore
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123 "How appointment reminders should be displayed.
124The options are:
125 window - use a separate window
126 echo - use the echo area
127 nil - no visible reminder.
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128See also `appt-audible' and `appt-display-mode-line'.
129
130The default value is 'ignore, which means to fall back on the value
131of the (obsolete) variables `appt-msg-window' and `appt-visible'."
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132 :type '(choice
133 (const :tag "Separate window" window)
134 (const :tag "Echo-area" echo)
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135 (const :tag "No visible display" nil)
136 (const :tag "Backwards compatibility setting - choose another value"
137 ignore))
8d638c1b 138 :group 'appt
bf247b6e 139 :version "22.1")
8d638c1b 140
8d638c1b 141(defcustom appt-display-mode-line t
40f79f5b 142 "Non-nil means display minutes to appointment and time on the mode line.
8d638c1b 143This is in addition to any other display of appointment messages."
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144 :type 'boolean
145 :group 'appt)
902a0e3c 146
8db540c5 147(defcustom appt-display-duration 10
40f79f5b 148 "The number of seconds an appointment message is displayed.
8d638c1b 149Only relevant if reminders are to be displayed in their own window."
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150 :type 'integer
151 :group 'appt)
902a0e3c 152
8db540c5 153(defcustom appt-display-diary t
40f79f5b 154 "Non-nil displays the diary when the appointment list is first initialized.
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155This will occur at midnight when the appointment list is updated."
156 :type 'boolean
157 :group 'appt)
902a0e3c 158
8db540c5 159(defcustom appt-display-interval 3
40f79f5b 160 "Number of minutes to wait between checking the appointment list."
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161 :type 'integer
162 :group 'appt)
a1506d29 163
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164(defcustom appt-disp-window-function 'appt-disp-window
165 "Function called to display appointment window.
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166Only relevant if reminders are being displayed in a window.
167It should take three string arguments: the number of minutes till
168the appointment, the current time, and the text of the appointment."
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169 :type '(choice (const appt-disp-window)
170 function)
171 :group 'appt)
172
173(defcustom appt-delete-window-function 'appt-delete-window
174 "Function called to remove appointment window and buffer.
175Only relevant if reminders are being displayed in a window."
176 :type '(choice (const appt-delete-window)
177 function)
178 :group 'appt)
179
180
181;;; Internal variables below this point.
182
e1422141 183(defconst appt-buffer-name "*appt-buf*"
5b586155 184 "Name of the appointments buffer.")
a1506d29 185
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186(defvar appt-time-msg-list nil
187 "The list of appointments for today.
188Use `appt-add' and `appt-delete' to add and delete appointments.
189The original list is generated from today's `diary-entries-list', and
190can be regenerated using the function `appt-check'.
5fac723a 191Each element of the generated list has the form (MINUTES STRING [FLAG]); where
8d638c1b 192MINUTES is the time in minutes of the appointment after midnight, and
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193STRING is the description of the appointment.
194FLAG, if non-nil, says that the element was made with `appt-add'
195so calling `appt-make-list' again should preserve it.")
a1506d29 196
0cb7f2c0 197(defconst appt-max-time (1- (* 24 60))
8d638c1b 198 "11:59pm in minutes - number of minutes in a day minus 1.")
b570e652 199
efa434d9 200(defvar appt-mode-string nil
f3e7c0dc 201 "String being displayed in the mode line saying you have an appointment.
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202The actual string includes the amount of time till the appointment.
203Only used if `appt-display-mode-line' is non-nil.")
464e8258 204(put 'appt-mode-string 'risky-local-variable t) ; for 'face property
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205
206(defvar appt-prev-comp-time nil
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207 "Time of day (mins since midnight) at which we last checked appointments.
208A nil value forces the diary file to be (re-)checked for appointments.")
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209
210(defvar appt-now-displayed nil
211 "Non-nil when we have started notifying about a appointment that is near.")
212
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213(defvar appt-display-count nil
214 "Internal variable used to count number of consecutive reminders.")
efa434d9 215
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216(defvar appt-timer nil
217 "Timer used for diary appointment notifications (`appt-check').
218If this is non-nil, appointment checking is active.")
219
220
221;;; Functions.
222
223(defun appt-display-message (string mins)
224 "Display a reminder about an appointment.
225The string STRING describes the appointment, due in integer MINS minutes.
226The format of the visible reminder is controlled by `appt-display-format'.
227The variable `appt-audible' controls the audible reminder."
cb17eeae 228 ;; Let-binding for backwards compatability. Remove when obsolete
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229 ;; vars appt-msg-window and appt-visible are dropped.
230 (let ((appt-display-format
231 (if (eq appt-display-format 'ignore)
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232 (cond (appt-msg-window 'window)
233 (appt-visible 'echo))
a19de628 234 appt-display-format)))
ce5b3019 235 (if appt-audible (beep 1))
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236 (cond ((eq appt-display-format 'window)
237 (funcall appt-disp-window-function
238 (number-to-string mins)
cb17eeae 239 ;; TODO - use calendar-month-abbrev-array rather than %b?
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240 (format-time-string "%a %b %e " (current-time))
241 string)
242 (run-at-time (format "%d sec" appt-display-duration)
243 nil
244 appt-delete-window-function))
245 ((eq appt-display-format 'echo)
ce5b3019 246 (message "%s" string)))))
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247
248
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249(defvar diary-selective-display)
250
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251(defun appt-check (&optional force)
252 "Check for an appointment and update any reminder display.
253If optional argument FORCE is non-nil, reparse the diary file for
254appointments. Otherwise the diary file is only parsed once per day,
255and when saved.
902a0e3c 256
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257Note: the time must be the first thing in the line in the diary
258for a warning to be issued. The format of the time can be either
25924 hour or am/pm. For example:
902a0e3c 260
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261 02/23/89
262 18:00 Dinner
a1506d29 263
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264 Thursday
265 11:45am Lunch meeting.
266
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267Appointments are checked every `appt-display-interval' minutes.
268The following variables control appointment notification:
902a0e3c 269
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270`appt-display-format'
271 Controls the format in which reminders are displayed.
902a0e3c 272
efa434d9 273`appt-audible'
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274 Variable used to determine if reminder is audible.
275 Default is t.
902a0e3c 276
8d638c1b 277`appt-message-warning-time'
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278 Variable used to determine when appointment message
279 should first be displayed.
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280
281`appt-display-mode-line'
282 If non-nil, a generic message giving the time remaining
283 is shown in the mode-line when an appointment is due.
284
285`appt-display-interval'
286 Interval in minutes at which to check for pending appointments.
902a0e3c 287
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288`appt-display-diary'
289 Display the diary buffer when the appointment list is
290 initialized for the first time in a day.
291
292The following variables are only relevant if reminders are being
293displayed in a window:
902a0e3c 294
efa434d9 295`appt-display-duration'
debf91fd 296 The number of seconds an appointment message is displayed.
b570e652 297
f3e7c0dc 298`appt-disp-window-function'
debf91fd 299 Function called to display appointment window.
a1506d29 300
f3e7c0dc 301`appt-delete-window-function'
debf91fd 302 Function called to remove appointment window and buffer."
ce5b3019 303 (interactive "P") ; so people can force updates
f3e7c0dc 304 (let* ((min-to-app -1)
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305 (prev-appt-mode-string appt-mode-string)
306 (prev-appt-display-count (or appt-display-count 0))
307 ;; Non-nil means do a full check for pending appointments and
308 ;; display in whatever ways the user has selected. When no
309 ;; appointment is being displayed, we always do a full check.
310 (full-check
311 (or (not appt-now-displayed)
312 ;; This is true every appt-display-interval minutes.
313 (zerop (mod prev-appt-display-count appt-display-interval))))
314 ;; Non-nil means only update the interval displayed in the mode line.
315 (mode-line-only (unless full-check appt-now-displayed))
ce5b3019 316 now cur-comp-time appt-comp-time)
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317 (when (or full-check mode-line-only)
318 (save-excursion
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319 ;; Convert current time to minutes after midnight (12.01am = 1).
320 (setq now (decode-time)
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321 cur-comp-time (+ (* 60 (nth 2 now)) (nth 1 now)))
322 ;; At first check in any day, update appointments to today's list.
323 (if (or force ; eg initialize, diary save
324 (null appt-prev-comp-time) ; first check
325 (< cur-comp-time appt-prev-comp-time)) ; new day
326 (condition-case nil
327 (if appt-display-diary
328 (let ((diary-hook
329 (if (assoc 'appt-make-list diary-hook)
330 diary-hook
331 (cons 'appt-make-list diary-hook))))
332 (diary))
333 (let* ((diary-display-hook 'appt-make-list)
334 (d-buff (find-buffer-visiting
335 (substitute-in-file-name diary-file)))
336 (selective
337 (if d-buff ; diary buffer exists
338 (with-current-buffer d-buff
339 diary-selective-display))))
340 (diary)
341 ;; If the diary buffer existed before this command,
342 ;; restore its display state. Otherwise, kill it.
343 (if d-buff
344 ;; Displays the diary buffer.
345 (or selective (diary-show-all-entries))
346 (and (setq d-buff (find-buffer-visiting
347 (substitute-in-file-name diary-file)))
348 (kill-buffer d-buff)))))
349 (error nil)))
350 (setq appt-prev-comp-time cur-comp-time
351 appt-mode-string nil
352 appt-display-count nil)
353 ;; If there are entries in the list, and the user wants a
354 ;; message issued, get the first time off of the list and
355 ;; calculate the number of minutes until the appointment.
356 (when (and appt-issue-message appt-time-msg-list)
357 (setq appt-comp-time (caar (car appt-time-msg-list))
358 min-to-app (- appt-comp-time cur-comp-time))
359 (while (and appt-time-msg-list
360 (< appt-comp-time cur-comp-time))
361 (setq appt-time-msg-list (cdr appt-time-msg-list))
362 (if appt-time-msg-list
363 (setq appt-comp-time (caar (car appt-time-msg-list)))))
364 ;; If we have an appointment between midnight and
365 ;; `appt-message-warning-time' minutes after midnight, we
366 ;; must begin to issue a message before midnight. Midnight
367 ;; is considered 0 minutes and 11:59pm is 1439
368 ;; minutes. Therefore we must recalculate the minutes to
369 ;; appointment variable. It is equal to the number of
370 ;; minutes before midnight plus the number of minutes after
371 ;; midnight our appointment is.
372 (if (and (< appt-comp-time appt-message-warning-time)
373 (> (+ cur-comp-time appt-message-warning-time)
374 appt-max-time))
375 (setq min-to-app (+ (- (1+ appt-max-time) cur-comp-time)
376 appt-comp-time)))
377 ;; Issue warning if the appointment time is within
378 ;; appt-message-warning time.
379 (when (and (<= min-to-app appt-message-warning-time)
380 (>= min-to-app 0))
381 (setq appt-now-displayed t
382 appt-display-count (1+ prev-appt-display-count))
383 (unless mode-line-only
384 (appt-display-message (cadr (car appt-time-msg-list))
385 min-to-app))
386 (when appt-display-mode-line
387 (setq appt-mode-string
388 (concat " " (propertize
389 (format "App't in %s min." min-to-app)
390 'face 'mode-line-emphasis))))
391 ;; When an appointment is reached, delete it from the
392 ;; list. Reset the count to 0 in case we display another
393 ;; appointment on the next cycle.
394 (if (zerop min-to-app)
395 (setq appt-time-msg-list (cdr appt-time-msg-list)
396 appt-display-count nil))))
397 ;; If we have changed the mode line string, redisplay all mode lines.
398 (and appt-display-mode-line
399 (not (string-equal appt-mode-string
400 prev-appt-mode-string))
401 (progn
402 (force-mode-line-update t)
403 ;; If the string now has a notification, redisplay right now.
404 (if appt-mode-string
405 (sit-for 0))))))))
902a0e3c 406
902a0e3c 407(defun appt-disp-window (min-to-app new-time appt-msg)
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408 "Display appointment due in MIN-TO-APP (a string) minutes.
409NEW-TIME is a string giving the date. Displays the appointment
410message APPT-MSG in a separate buffer."
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411 ;; Make sure we're not in the minibuffer before splitting the window.
412 ;; FIXME this seems needlessly complicated?
413 (when (minibufferp)
414 (other-window 1)
415 (and (minibufferp) (display-multi-frame-p) (other-frame 1)))
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416 (let ((this-window (selected-window))
417 (appt-disp-buf (set-buffer (get-buffer-create appt-buffer-name))))
d5b22d88 418 (if (cdr (assq 'unsplittable (frame-parameters)))
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419 ;; In an unsplittable frame, use something somewhere else.
420 (display-buffer appt-disp-buf)
058961dd 421 (unless (or (special-display-p (buffer-name appt-disp-buf))
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422 (same-window-p (buffer-name appt-disp-buf)))
423 ;; By default, split the bottom window and use the lower part.
424 (appt-select-lowest-window)
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425 ;; Split the window, unless it's too small to do so.
426 (when (>= (window-height) (* 2 window-min-height))
427 (select-window (split-window))))
3b316424 428 (switch-to-buffer appt-disp-buf))
ce5b3019 429 ;; FIXME Link to diary entry?
3b316424 430 (calendar-set-mode-line
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431 (format " Appointment %s. %s "
432 (if (string-equal "0" min-to-app) "now"
433 (format "in %s minute%s" min-to-app
434 (if (string-equal "1" min-to-app) "" "s")))
435 new-time))
436 (setq buffer-read-only nil
437 buffer-undo-list t)
efa434d9 438 (erase-buffer)
0e13751e 439 (insert appt-msg)
d5b22d88 440 (shrink-window-if-larger-than-buffer (get-buffer-window appt-disp-buf t))
5b586155 441 (set-buffer-modified-p nil)
ce5b3019 442 (setq buffer-read-only t)
725ec4bc 443 (raise-frame (selected-frame))
8d638c1b 444 (select-window this-window)))
a1506d29 445
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446(defun appt-delete-window ()
447 "Function called to undisplay appointment messages.
448Usually just deletes the appointment buffer."
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449 (let ((window (get-buffer-window appt-buffer-name t)))
450 (and window
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451 (or (eq window (frame-root-window (window-frame window)))
452 (delete-window window))))
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453 (kill-buffer appt-buffer-name)
454 (if appt-audible
455 (beep 1)))
902a0e3c 456
902a0e3c 457(defun appt-select-lowest-window ()
debf91fd 458 "Select the lowest window on the frame."
7c0d9b89 459 (let ((lowest-window (selected-window))
debf91fd 460 (bottom-edge (nth 3 (window-edges)))
ce5b3019 461 next-bottom-edge)
7c0d9b89 462 (walk-windows (lambda (w)
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463 (when (< bottom-edge (setq next-bottom-edge
464 (nth 3 (window-edges w))))
465 (setq bottom-edge next-bottom-edge
466 lowest-window w))) 'nomini)
7c0d9b89 467 (select-window lowest-window)))
902a0e3c 468
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469(defconst appt-time-regexp
470 "[0-9]?[0-9]\\(h\\([0-9][0-9]\\)?\\|[:.][0-9][0-9]\\)\\(am\\|pm\\)?")
471
f3e7c0dc 472;;;###autoload
902a0e3c 473(defun appt-add (new-appt-time new-appt-msg)
9080baba 474 "Add an appointment for today at NEW-APPT-TIME with message NEW-APPT-MSG.
902a0e3c 475The time should be in either 24 hour format or am/pm format."
902a0e3c 476 (interactive "sTime (hh:mm[am/pm]): \nsMessage: ")
0cb7f2c0 477 (unless (string-match appt-time-regexp new-appt-time)
902a0e3c 478 (error "Unacceptable time-string"))
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479 (let ((time-msg (list (list (appt-convert-time new-appt-time))
480 (concat new-appt-time " " new-appt-msg) t)))
481 (unless (member time-msg appt-time-msg-list)
482 (setq appt-time-msg-list
483 (appt-sort-list (nconc appt-time-msg-list (list time-msg)))))))
902a0e3c 484
f3e7c0dc 485;;;###autoload
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486(defun appt-delete ()
487 "Delete an appointment from the list of appointments."
488 (interactive)
8d638c1b 489 (let ((tmp-msg-list appt-time-msg-list))
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490 (dolist (element tmp-msg-list)
491 (if (y-or-n-p (concat "Delete "
492 ;; We want to quote any doublequotes in the
493 ;; string, as well as put doublequotes around it.
494 (prin1-to-string
495 (substring-no-properties (cadr element) 0))
496 " from list? "))
497 (setq appt-time-msg-list (delq element appt-time-msg-list)))))
498 (appt-check)
499 (message ""))
a1506d29 500
902a0e3c 501
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502(defvar number)
503(defvar original-date)
504(defvar diary-entries-list)
467f174b 505;; Autoload for the old way of using this package. Can be removed sometime.
637a8ae9 506;;;###autoload
902a0e3c 507(defun appt-make-list ()
5fac723a 508 "Update the appointments list from today's diary buffer.
d073fa5b 509The time must be at the beginning of a line for it to be
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510put in the appointments list (see examples in documentation of
511the function `appt-check'). We assume that the variables DATE and
59b79385 512NUMBER hold the arguments that `diary-list-entries' received.
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513They specify the range of dates that the diary is being processed for.
514
ce5b3019 515Any appointments made with `appt-add' are not affected by this function.
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516
517For backwards compatibility, this function activates the
518appointment package (if it is not already active)."
519 ;; See comments above appt-activate defun.
520 (if (not appt-timer)
521 (appt-activate 1)
522 ;; We have something to do if the range of dates that the diary is
523 ;; considering includes the current date.
524 (if (and (not (calendar-date-compare
525 (list (calendar-current-date))
526 (list original-date)))
527 (calendar-date-compare
528 (list (calendar-current-date))
529 (list (calendar-gregorian-from-absolute
530 (+ (calendar-absolute-from-gregorian original-date)
531 number)))))
532 (save-excursion
533 ;; Clear the appointments list, then fill it in from the diary.
534 (dolist (elt appt-time-msg-list)
535 ;; Delete any entries that were not made with appt-add.
536 (unless (nth 2 elt)
537 (setq appt-time-msg-list
538 (delq elt appt-time-msg-list))))
539 (if diary-entries-list
871ce753 540 ;; Cycle through the entry-list (diary-entries-list)
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541 ;; looking for entries beginning with a time. If the
542 ;; entry begins with a time, add it to the
543 ;; appt-time-msg-list. Then sort the list.
871ce753 544 (let ((entry-list diary-entries-list)
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545 (new-time-string "")
546 time-string)
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547 ;; Skip diary entries for dates before today.
548 (while (and entry-list
549 (calendar-date-compare
550 (car entry-list) (list (calendar-current-date))))
551 (setq entry-list (cdr entry-list)))
552 ;; Parse the entries for today.
553 (while (and entry-list
554 (calendar-date-equal
35471668 555 (calendar-current-date) (caar entry-list)))
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556 (setq time-string (cadr (car entry-list)))
557 (while (string-match appt-time-regexp time-string)
558 (let* ((beg (match-beginning 0))
559 ;; Get just the time for this appointment.
560 (only-time (match-string 0 time-string))
561 ;; Find the end of this appointment
562 ;; (the start of the next).
563 (end (string-match
564 (concat "\n[ \t]*" appt-time-regexp)
565 time-string
566 (match-end 0)))
567 ;; Get the whole string for this appointment.
568 (appt-time-string
569 (substring time-string beg (if end (1- end))))
570 (appt-time (list (appt-convert-time only-time)))
571 (time-msg (list appt-time appt-time-string)))
572 ;; Add this appointment to appt-time-msg-list.
573 (setq appt-time-msg-list
574 (nconc appt-time-msg-list (list time-msg))
575 ;; Discard this appointment from the string.
576 time-string
577 (if end (substring time-string end) ""))))
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578 (setq entry-list (cdr entry-list)))))
579 (setq appt-time-msg-list (appt-sort-list appt-time-msg-list))
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580 ;; Convert current time to minutes after midnight (12:01am = 1),
581 ;; so that elements in the list that are earlier than the
582 ;; present time can be removed.
871ce753 583 (let* ((now (decode-time))
ce5b3019 584 (cur-comp-time (+ (* 60 (nth 2 now)) (nth 1 now)))
35471668 585 (appt-comp-time (caar (car appt-time-msg-list))))
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586 (while (and appt-time-msg-list (< appt-comp-time cur-comp-time))
587 (setq appt-time-msg-list (cdr appt-time-msg-list))
588 (if appt-time-msg-list
35471668 589 (setq appt-comp-time (caar (car appt-time-msg-list))))))))))
a1506d29 590
902a0e3c 591
902a0e3c 592(defun appt-sort-list (appt-list)
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593 "Sort an appointment list, putting earlier items at the front.
594APPT-LIST is a list of the same format as `appt-time-msg-list'."
11361a8b 595 (sort appt-list (lambda (e1 e2) (< (caar e1) (caar e2)))))
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596
597
598(defun appt-convert-time (time2conv)
754c5007 599 "Convert hour:min[am/pm] format TIME2CONV to minutes from midnight.
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600A period (.) can be used instead of a colon (:) to separate the
601hour and minute parts."
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602 ;; Formats that should be accepted:
603 ;; 10:00 10.00 10h00 10h 10am 10:00am 10.00am
604 (let ((min (if (string-match "[h:.]\\([0-9][0-9]\\)" time2conv)
605 (string-to-number (match-string 1 time2conv))
606 0))
607 (hr (if (string-match "[0-9]*[0-9]" time2conv)
608 (string-to-number (match-string 0 time2conv))
609 0)))
cb17eeae 610 ;; Convert the time appointment time into 24 hour time.
85bbde63 611 (cond ((and (string-match "pm" time2conv) (< hr 12))
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612 (setq hr (+ 12 hr)))
613 ((and (string-match "am" time2conv) (= hr 12))
85bbde63 614 (setq hr 0)))
cb17eeae 615 ;; Convert the actual time into minutes.
0cb7f2c0 616 (+ (* hr 60) min)))
902a0e3c 617
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618(defun appt-update-list ()
619 "If the current buffer is visiting the diary, update appointments.
620This function is intended for use with `write-file-functions'."
359bff67 621 (and (string-equal buffer-file-name (expand-file-name diary-file))
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622 appt-timer
623 (let ((appt-display-diary nil))
624 (appt-check t)))
625 nil)
626
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627;; In Emacs-21.3, the manual documented the following procedure to
628;; activate this package:
629;; (display-time)
630;; (add-hook 'diary-hook 'appt-make-list)
631;; (diary 0)
632;; The display-time call was not necessary, AFAICS.
633;; What was really needed was to add the hook and load this file.
634;; Calling (diary 0) once the hook had been added was in some sense a
635;; roundabout way of loading this file. This file used to have code at
636;; the top-level that set up the appt-timer and global-mode-string.
637;; One way to maintain backwards compatibility would be to call
638;; (appt-activate 1) at top-level. However, this goes against the
639;; convention that just loading an Emacs package should not activate
640;; it. Instead, we make appt-make-list activate the package (after a
641;; suggestion from rms). This means that one has to call diary in
642;; order to get it to work, but that is in line with the old (weird,
643;; IMO) documented behavior for activating the package.
644;; Actually, since (diary 0) does not run diary-hook, I don't think
645;; the documented behavior in Emacs-21.3 would ever have worked.
646;; Oh well, at least with the changes to appt-make-list it will now
647;; work as well as it ever did.
648;; The new method is just to use (appt-activate 1).
649;; -- gmorris
650
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651;;;###autoload
652(defun appt-activate (&optional arg)
debf91fd 653 "Toggle checking of appointments.
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654With optional numeric argument ARG, turn appointment checking on if
655ARG is positive, otherwise off."
656 (interactive "P")
657 (let ((appt-active appt-timer))
658 (setq appt-active (if arg (> (prefix-numeric-value arg) 0)
659 (not appt-active)))
660 (remove-hook 'write-file-functions 'appt-update-list)
661 (or global-mode-string (setq global-mode-string '("")))
662 (delq 'appt-mode-string global-mode-string)
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663 (when appt-timer
664 (cancel-timer appt-timer)
665 (setq appt-timer nil))
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666 (when appt-active
667 (add-hook 'write-file-functions 'appt-update-list)
668 (setq appt-timer (run-at-time t 60 'appt-check)
669 global-mode-string
670 (append global-mode-string '(appt-mode-string)))
671 (appt-check t))))
672
efa434d9 673
8d638c1b 674(provide 'appt)
5b586155 675
0cb7f2c0 676;; arch-tag: bf5791c4-8921-499e-a26f-772b1788d347
efa434d9 677;;; appt.el ends here