;;; time.el --- display time and load in mode line of Emacs.
-;; Copyright (C) 1985, 1986, 1987 Free Software Foundation, Inc.
+;; Copyright (C) 1985, 1986, 1987, 1993, 1994 Free Software Foundation, Inc.
;; Maintainer: FSF
(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.")
+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 "\
"*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.
+ "*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 ()
"Display current time, load level, and mail flag in mode line of each buffer.
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))))
+ (let ((live (or (and (eq system-type 'ms-dos) dos-display-time)
+ (and display-time-process
+ (eq (process-status display-time-process) 'run)))))
(if (not live)
(progn
(if display-time-process
(setq global-mode-string
(append global-mode-string '(display-time-string))))
(setq display-time-string "")
- (setq display-time-process
- (start-process "display-time" nil
- (concat exec-directory "wakeup")
- (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)))))
+ (if (eq system-type 'ms-dos)
+ (setq dos-display-time t)
+ ;; Using a pty is wasteful, and the separate session causes
+ ;; annoyance sometimes (some systems kill idle sessions).
+ (progn
+ (let ((process-connection-type nil))
+ (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))
+ (force-mode-line-update t)
(sit-for 0))
+(defvar display-time-string-forms
+ '((if display-time-day-and-date
+ (format "%s %s %s " dayname monthname day)
+ "")
+ (format "%s:%s%s"
+ (if display-time-24hr-format 24-hours 12-hours)
+ minutes
+ (if display-time-24hr-format "" am-pm))
+ load
+ (if mail " Mail" ""))
+ "*A list of expressions governing display of the time in the mode line.
+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-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)
- (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 ""))
+ (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
- (concat (format "%d" hour) (substring time 13 16)
- am-pm-flag
- load
- (if (and (file-exists-p mail-spool-file)
- ;; file not empty?
- (display-time-file-nonempty-p mail-spool-file))
- " Mail"
- "")))
- ;; 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))
+ (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)
;; Do redisplay right now, if no input pending.
(sit-for 0))
(defun display-time-file-nonempty-p (file)
- (while (file-symlink-p file)
- (setq file (file-symlink-p file)))
- (> (nth 7 (file-attributes file)) 0))
+ (and (file-exists-p file)
+ (< 0 (nth 7 (file-attributes (file-chase-links file))))))
;;; time.el ends here
HCoop / bpt / emacs.git / blobdiff