;;; Code:
-(defvar display-time-mail-file nil
+(defgroup display-time nil
+ "Display time and load in mode line of Emacs."
+ :group 'modeline
+ :group 'mail)
+
+
+(defcustom display-time-mode nil
+ "Toggle display of time, load level, and mail flag in mode lines.
+You must modify via \\[customize] for this variable to have an effect."
+ :set (lambda (symbol value)
+ (display-time-mode (or value 0)))
+ :initialize 'custom-initialize-default
+ :type 'boolean
+ :group 'display-time
+ :require 'time
+ :version "20.3")
+
+
+(defcustom 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.")
+default, which is system-dependent, and is the same as used by Rmail."
+ :type '(choice (const :tag "Default" nil)
+ (file :format "%v"))
+ :group 'display-time)
;;;###autoload
-(defvar display-time-day-and-date nil "\
-*Non-nil means \\[display-time] should display day and date as well as time.")
+(defcustom display-time-day-and-date nil "\
+*Non-nil means \\[display-time] should display day and date as well as time."
+ :type 'boolean
+ :group 'display-time)
(defvar display-time-timer nil)
-(defvar display-time-interval 60
- "*Seconds between updates of time in the mode line.")
+(defcustom display-time-interval 60
+ "*Seconds between updates of time in the mode line."
+ :type 'integer
+ :group 'display-time)
-(defvar display-time-24hr-format nil
+(defcustom 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.")
+Nil means 1 <= hh <= 12, and an AM/PM suffix is used."
+ :type 'boolean
+ :group 'display-time)
(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.")
+(defcustom display-time-hook nil
+ "*List of functions to be called when the time is updated on the mode line."
+ :type 'hook
+ :group 'display-time)
(defvar display-time-server-down-time nil
"Time when mail file's file system was recorded to be down.
;;;###autoload
(defun display-time ()
- "Display current time, load level, and mail flag in mode line of each buffer.
-Updates automatically every minute.
+ "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.
-After each update, `display-time-hook' is run with `run-hooks'."
+This runs the normal hook `display-time-hook' after each update."
(interactive)
- (setq display-time-string "")
- (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))))
- ;; Setup the time timer.
- (and display-time-timer (cancel-timer display-time-timer))
- (setq display-time-timer
- ;; Start timer at the beginning of the next minute.
- (run-at-time (apply 'encode-time 60 (cdr (decode-time)))
- display-time-interval 'display-time-event-handler))
- ;; When you get new mail, clear "Mail" from the mode line.
- (add-hook 'rmail-after-get-new-mail-hook 'display-time-event-handler))
-
-(defvar display-time-string-forms
- '((if display-time-day-and-date
- (format "%s %s %s " dayname monthname day)
+ (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))))
+ (setq display-time-mode on)
+ (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))))
+
+
+(defcustom display-time-format nil
+ "*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. If this is nil, the defaults
+depend on `display-time-day-and-date' and `display-time-24hr-format'."
+ :type '(choice (const :tag "Default" nil)
+ string)
+ :group 'display-time)
+
+(defcustom display-time-string-forms
+ '((if (and (not display-time-format) display-time-day-and-date)
+ (format-time-string "%a %b %e " now)
"")
- (format "%s:%s%s"
- (if display-time-24hr-format 24-hours 12-hours)
- minutes
- (if display-time-24hr-format "" am-pm))
+ (format-time-string (or display-time-format
+ (if display-time-24hr-format "%H:%M" "%-I:%M%p"))
+ 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',
(if time-zone \" (\") time-zone (if time-zone \")\")
(if mail \" Mail\" \"\"))
-would give mode line times like `94/12/30 21:07:48 (UTC)'.")
+would give mode line times like `94/12/30 21:07:48 (UTC)'."
+ :type 'sexp
+ :group 'display-time)
(defun display-time-event-handler ()
(display-time-update)
;; Do redisplay right now, if no input pending.
- (sit-for 0))
+ (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
(if (> (- (nth 1 (current-time)) (nth 1 start-time))
20)
;; Record that mail file is not accessible.
- (setq display-time-server-down-time
+ (setq display-time-server-down-time
(nth 1 (current-time)))
;; Record that mail file is accessible.
(setq display-time-server-down-time nil))))))
(and (file-exists-p file)
(< 0 (nth 7 (file-attributes (file-chase-links file))))))
+(if display-time-mode
+ (display-time-mode t))
+
+(provide 'time)
+
;;; time.el ends here