-;;; time.el --- display time and load in mode line of Emacs.
-
-;; Copyright (C) 1985, 1986, 1987, 1993 Free Software Foundation, Inc.
-
-;; Maintainer: FSF
-
-;; This file is part of GNU Emacs.
-
-;; GNU Emacs is free software; you can redistribute it and/or modify
-;; it under the terms of the GNU General Public License as published by
-;; the Free Software Foundation; either version 2, or (at your option)
-;; any later version.
-
-;; GNU Emacs is distributed in the hope that it will be useful,
-;; but WITHOUT ANY WARRANTY; without even the implied warranty of
-;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-;; GNU General Public License for more details.
-
-;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs; see the file COPYING. If not, write to
-;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-
-;;; Commentary:
-
-;;; Facilities to display current time/date and a new-mail indicator
-;;; in the Emacs mode line. The single entry point is `display-time'.
-
-;;; Code:
-
-(defvar display-time-mail-file nil
- "*File name of mail inbox file, for indicating existence of new mail.
-Default is system-dependent, and is the same as used by Rmail.")
-
-;;;###autoload
-(defvar display-time-day-and-date nil "\
-*Non-nil means \\[display-time] should display day and date as well as time.")
-
-(defvar display-time-process nil)
-
-(defvar display-time-interval 60
- "*Seconds between updates of time in the mode line.")
-
-(defvar display-time-24hr-format nil
- "*Non-nill indicates time should be displayed as hh:mm, 0 <= hh <= 23.
-Nil means 1 <= hh <= 12, and an AM/PM suffix is used.")
-
-(defvar display-time-string nil)
-
-(defvar display-time-hook nil
- "* List of functions to be called when the time is updated on the mode line.")
-
-(defvar display-time-server-down-time nil
- "Time when mail file's file system was recorded to be down.
-If that file system seems to be up, the value is nil.")
-
-;;;###autoload
-(defun display-time ()
- "Display current time, load level, and mail flag in mode line of each buffer.
-Updates automatically every minute.
-If `display-time-day-and-date' is non-nil, the current day and date
-are displayed as well.
-After each update, `display-time-hook' is run with `run-hooks'."
- (interactive)
- (let ((live (and display-time-process
- (eq (process-status display-time-process) 'run))))
- (if (not live)
- (progn
- (if display-time-process
- (delete-process display-time-process))
- (or global-mode-string (setq global-mode-string '("")))
- (or (memq 'display-time-string global-mode-string)
- (setq global-mode-string
- (append global-mode-string '(display-time-string))))
- (setq display-time-string "")
- (setq display-time-process
- (start-process "display-time" nil
- (expand-file-name "wakeup" exec-directory)
- (int-to-string display-time-interval)))
- (process-kill-without-query display-time-process)
- (set-process-sentinel display-time-process 'display-time-sentinel)
- (set-process-filter display-time-process 'display-time-filter)))))
-
-(defun display-time-sentinel (proc reason)
- (or (eq (process-status proc) 'run)
- (setq display-time-string ""))
- ;; Force mode-line updates
- (save-excursion (set-buffer (other-buffer)))
- (set-buffer-modified-p (buffer-modified-p))
- (sit-for 0))
-
-(defun display-time-filter (proc string)
- (let ((time (current-time-string))
- (load (condition-case ()
- (if (zerop (car (load-average))) ""
- (let ((str (format " %03d" (car (load-average)))))
- (concat (substring str 0 -2) "." (substring str -2))))
- (error "")))
- (mail-spool-file (or display-time-mail-file
- (getenv "MAIL")
- (concat rmail-spool-directory
- (or (getenv "LOGNAME")
- (getenv "USER")
- (user-login-name)))))
- hour am-pm-flag mail-flag)
- (setq hour (read (substring time 11 13)))
- (if (not display-time-24hr-format)
- (progn
- (setq am-pm-flag (if (>= hour 12) "pm" "am"))
- (if (> hour 12)
- (setq hour (- hour 12))
- (if (= hour 0)
- (setq hour 12))))
- (setq am-pm-flag ""))
- (setq mail-flag
- (if (and (or (null display-time-server-down-time)
- ;; If have been down for 20 min, try again.
- (> (- (nth 1 (current-time))
- display-time-server-down-time)
- 1200))
- (let ((start-time (current-time)))
- (prog1
- (display-time-file-nonempty-p mail-spool-file)
- (if (> (- (nth 1 (current-time)) (nth 1 start-time))
- 20)
- ;; Record that mail file is not accessible.
- (setq display-time-server-down-time
- (nth 1 (current-time)))
- ;; Record that mail file is accessible.
- (setq display-time-server-down-time nil))
- )))
- " Mail"
- ""))
- (setq display-time-string
- (concat (format "%d" hour) (substring time 13 16)
- am-pm-flag
- load
- mail-flag))
- ;; Append the date if desired.
- (if display-time-day-and-date
- (setq display-time-string
- (concat (substring time 0 11) display-time-string))))
- (run-hooks 'display-time-hook)
- ;; Force redisplay of all buffers' mode lines to be considered.
- (save-excursion (set-buffer (other-buffer)))
- (set-buffer-modified-p (buffer-modified-p))
- ;; Do redisplay right now, if no input pending.
- (sit-for 0))
-
-(defun display-time-file-nonempty-p (file)
- (and (file-exists-p file)
- (< 0 (nth 7 (file-attributes (file-chase-links file))))))
-
-;;; time.el ends here
+;;; time.el --- display time and load in mode line of Emacs.
+
+;; Copyright (C) 1985, 86, 87, 93, 94, 1996 Free Software Foundation, Inc.
+
+;; Maintainer: FSF
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2, or (at your option)
+;; any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs; see the file COPYING. If not, write to the
+;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Commentary:
+
+;; Facilities to display current time/date and a new-mail indicator
+;; in the Emacs mode line. The single entry point is `display-time'.
+
+;;; Code:
+
+(defvar display-time-mail-file nil
+ "*File name of mail inbox file, for indicating existence of new mail.
+Non-nil and not a string means don't check for mail. nil means use
+default, which is system-dependent, and is the same as used by Rmail.")
+
+;;;###autoload
+(defvar display-time-day-and-date nil "\
+*Non-nil means \\[display-time] should display day and date as well as time.")
+
+(defvar display-time-timer nil)
+
+(defvar display-time-interval 60
+ "*Seconds between updates of time in the mode line.")
+
+(defvar display-time-24hr-format nil
+ "*Non-nil indicates time should be displayed as hh:mm, 0 <= hh <= 23.
+Nil means 1 <= hh <= 12, and an AM/PM suffix is used.")
+
+(defvar display-time-string nil)
+
+(defvar display-time-hook nil
+ "* List of functions to be called when the time is updated on the mode line.")
+
+(defvar display-time-server-down-time nil
+ "Time when mail file's file system was recorded to be down.
+If that file system seems to be up, the value is nil.")
+
+;;;###autoload
+(defun display-time ()
+ "Enable display of time, load level, and mail flag in mode lines.
+This display updates automatically every minute.
+If `display-time-day-and-date' is non-nil, the current day and date
+are displayed as well.
+This runs the normal hook `display-time-hook' after each update."
+ (interactive)
+ (display-time-mode 1))
+
+;;;###autoload
+(defun display-time-mode (arg)
+ "Toggle display of time, load level, and mail flag in mode lines.
+With a numeric arg, enable this display if arg is positive.
+
+When this display is enabled, it updates automatically every minute.
+If `display-time-day-and-date' is non-nil, the current day and date
+are displayed as well.
+This runs the normal hook `display-time-hook' after each update."
+ (interactive "P")
+ (let ((on (if (null arg)
+ (not display-time-timer)
+ (> (prefix-numeric-value arg) 0))))
+ (and display-time-timer (cancel-timer display-time-timer))
+ (setq display-time-timer nil)
+ (setq display-time-string "")
+ (or global-mode-string (setq global-mode-string '("")))
+ (if on
+ (progn
+ (or (memq 'display-time-string global-mode-string)
+ (setq global-mode-string
+ (append global-mode-string '(display-time-string))))
+ ;; Set up the time timer.
+ (setq display-time-timer
+ (run-at-time t display-time-interval
+ 'display-time-event-handler))
+ ;; Make the time appear right away.
+ (display-time-update)
+ ;; When you get new mail, clear "Mail" from the mode line.
+ (add-hook 'rmail-after-get-new-mail-hook
+ 'display-time-event-handler))
+ (remove-hook 'rmail-after-get-new-mail-hook
+ 'display-time-event-handler))))
+
+
+(defvar display-time-format
+ (concat
+ (if display-time-day-and-date
+ "%a %b %e" "")
+ (if display-time-24hr-format "%H:%m" "%-I:%M%p"))
+ "*A string specifying the format for displaying the time in the mode line.
+See the function `format-time-string' for an explanation of
+how to write this string.")
+
+(defvar display-time-string-forms
+ '((format-time-string display-time-format now)
+ load
+ (if mail " Mail" ""))
+ "*A list of expressions governing display of the time in the mode line.
+For most purposes, you can control the time format using `display-time-format'
+which is a more standard interface.
+
+This expression is a list of expressions that can involve the keywords
+`load', `day', `month', and `year', `12-hours', `24-hours', `minutes',
+`seconds', all numbers in string form, and `monthname', `dayname', `am-pm',
+and `time-zone' all alphabetic strings, and `mail' a true/nil value.
+
+For example, the form
+
+ '((substring year -2) \"/\" month \"/\" day
+ \" \" 24-hours \":\" minutes \":\" seconds
+ (if time-zone \" (\") time-zone (if time-zone \")\")
+ (if mail \" Mail\" \"\"))
+
+would give mode line times like `94/12/30 21:07:48 (UTC)'.")
+
+(defun display-time-event-handler ()
+ (display-time-update)
+ ;; Do redisplay right now, if no input pending.
+ (sit-for 0)
+ (let* ((current (current-time))
+ (timer display-time-timer)
+ ;; Compute the time when this timer will run again, next.
+ (next-time (timer-relative-time
+ (list (aref timer 1) (aref timer 2) (aref timer 3))
+ (* 5 (aref timer 4)) 0)))
+ ;; If the activation time is far in the past,
+ ;; skip executions until we reach a time in the future.
+ ;; This avoids a long pause if Emacs has been suspended for hours.
+ (or (> (nth 0 next-time) (nth 0 current))
+ (and (= (nth 0 next-time) (nth 0 current))
+ (> (nth 1 next-time) (nth 1 current)))
+ (and (= (nth 0 next-time) (nth 0 current))
+ (= (nth 1 next-time) (nth 1 current))
+ (> (nth 2 next-time) (nth 2 current)))
+ (progn
+ (timer-set-time timer (timer-next-integral-multiple-of-time
+ current display-time-interval)
+ display-time-interval)
+ (timer-activate timer)))))
+
+;; Update the display-time info for the mode line
+;; but don't redisplay right now. This is used for
+;; things like Rmail `g' that want to force an update
+;; which can wait for the next redisplay.
+(defun display-time-update ()
+ (let* ((now (current-time))
+ (time (current-time-string now))
+ (load (condition-case ()
+ (if (zerop (car (load-average))) ""
+ (let ((str (format " %03d" (car (load-average)))))
+ (concat (substring str 0 -2) "." (substring str -2))))
+ (error "")))
+ (mail-spool-file (or display-time-mail-file
+ (getenv "MAIL")
+ (concat rmail-spool-directory
+ (user-login-name))))
+ (mail (and (stringp mail-spool-file)
+ (or (null display-time-server-down-time)
+ ;; If have been down for 20 min, try again.
+ (> (- (nth 1 (current-time))
+ display-time-server-down-time)
+ 1200))
+ (let ((start-time (current-time)))
+ (prog1
+ (display-time-file-nonempty-p mail-spool-file)
+ (if (> (- (nth 1 (current-time)) (nth 1 start-time))
+ 20)
+ ;; Record that mail file is not accessible.
+ (setq display-time-server-down-time
+ (nth 1 (current-time)))
+ ;; Record that mail file is accessible.
+ (setq display-time-server-down-time nil))))))
+ (24-hours (substring time 11 13))
+ (hour (string-to-int 24-hours))
+ (12-hours (int-to-string (1+ (% (+ hour 11) 12))))
+ (am-pm (if (>= hour 12) "pm" "am"))
+ (minutes (substring time 14 16))
+ (seconds (substring time 17 19))
+ (time-zone (car (cdr (current-time-zone now))))
+ (day (substring time 8 10))
+ (year (substring time 20 24))
+ (monthname (substring time 4 7))
+ (month
+ (cdr
+ (assoc
+ monthname
+ '(("Jan" . "1") ("Feb" . "2") ("Mar" . "3") ("Apr" . "4")
+ ("May" . "5") ("Jun" . "6") ("Jul" . "7") ("Aug" . "8")
+ ("Sep" . "9") ("Oct" . "10") ("Nov" . "11") ("Dec" . "12")))))
+ (dayname (substring time 0 3)))
+ (setq display-time-string
+ (mapconcat 'eval display-time-string-forms ""))
+ ;; This is inside the let binding, but we are not going to document
+ ;; what variables are available.
+ (run-hooks 'display-time-hook))
+ (force-mode-line-update))
+
+(defun display-time-file-nonempty-p (file)
+ (and (file-exists-p file)
+ (< 0 (nth 7 (file-attributes (file-chase-links file))))))
+
+;;; time.el ends here
HCoop / bpt / emacs.git / blobdiff