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128 lines
4.4 KiB
EmacsLisp
128 lines
4.4 KiB
EmacsLisp
;;; time.el --- display time and load in mode line of Emacs.
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;; Copyright (C) 1985, 1986, 1987 Free Software Foundation, Inc.
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 1, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to
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;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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(defvar display-time-mail-file nil
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"*File name of mail inbox file, for indicating existence of new mail.
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Default is system-dependent, and is the same as used by Rmail.")
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;;;###autoload
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(defconst display-time-day-and-date nil "\
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*Non-nil means \\[display-time] should display day and date as well as time.")
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(defvar display-time-process nil)
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(defvar display-time-interval 60
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"*Seconds between updates of time in the mode line.")
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(defvar display-time-24hr-format nil
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"Non-nill indicates time should be displayed as hh:mm, 0 <= hh <= 23.
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Nil means 1 <= hh <= 12, and an AM/PM suffix is used.")
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(defvar display-time-string nil)
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(defvar display-time-hook nil
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"* List of functions to be called when the time is updated on the mode line.")
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;;;###autoload
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(defun display-time ()
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"Display current time and load level in mode line of each buffer.
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Updates automatically every minute.
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If `display-time-day-and-date' is non-nil, the current day and date
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are displayed as well.
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After each update, `display-time-hook' is run with `run-hooks'."
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(interactive)
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(let ((live (and display-time-process
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(eq (process-status display-time-process) 'run))))
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(if (not live)
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(progn
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(if display-time-process
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(delete-process display-time-process))
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(or global-mode-string (setq global-mode-string '("")))
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(or (memq 'display-time-string global-mode-string)
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(setq global-mode-string
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(append global-mode-string '(display-time-string))))
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(setq display-time-string "")
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(setq display-time-process
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(start-process "display-time" nil
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(concat exec-directory "wakeup")
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(int-to-string display-time-interval)))
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(process-kill-without-query display-time-process)
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(set-process-sentinel display-time-process 'display-time-sentinel)
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(set-process-filter display-time-process 'display-time-filter)))))
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(defun display-time-sentinel (proc reason)
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(or (eq (process-status proc) 'run)
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(setq display-time-string ""))
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;; Force mode-line updates
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(save-excursion (set-buffer (other-buffer)))
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(set-buffer-modified-p (buffer-modified-p))
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(sit-for 0))
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(defun display-time-filter (proc string)
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(let ((time (current-time-string))
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(load (condition-case ()
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(if (zerop (car (load-average))) ""
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(let ((str (format " %03d" (car (load-average)))))
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(concat (substring str 0 -2) "." (substring str -2))))
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(error "")))
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(mail-spool-file (or display-time-mail-file
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(getenv "MAIL")
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(concat rmail-spool-directory
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(or (getenv "LOGNAME")
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(getenv "USER")
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(user-login-name)))))
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hour am-pm-flag)
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(setq hour (read (substring time 11 13)))
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(if (not display-time-24hr-format)
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(progn
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(setq am-pm-flag (if (>= hour 12) "pm" "am"))
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(if (> hour 12)
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(setq hour (- hour 12))
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(if (= hour 0)
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(setq hour 12))))
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(setq am-pm-flag ""))
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(setq display-time-string
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(concat (format "%d" hour) (substring time 13 16)
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am-pm-flag
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load
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(if (and (file-exists-p mail-spool-file)
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;; file not empty?
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(display-time-file-nonempty-p mail-spool-file))
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" Mail"
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"")))
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;; Append the date if desired.
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(if display-time-day-and-date
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(setq display-time-string
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(concat (substring time 0 11) display-time-string))))
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(run-hooks 'display-time-hook)
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;; Force redisplay of all buffers' mode lines to be considered.
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(save-excursion (set-buffer (other-buffer)))
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(set-buffer-modified-p (buffer-modified-p))
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;; Do redisplay right now, if no input pending.
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(sit-for 0))
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(defun display-time-file-nonempty-p (file)
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(while (file-symlink-p file)
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(setq file (file-symlink-p file)))
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(> (nth 7 (file-attributes file)) 0))
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;;; time.el ends here
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