Return to time.el CVS log

Up to [CSRG BSD Unix] / 43BSDReno / contrib / emacs-18.55 / lisp

Annotation of 43BSDReno/contrib/emacs-18.55/lisp/time.el, revision 1.1.1.1

1.1       root        1: ;; Display time and load in mode line of Emacs.
                      2: ;; Copyright (C) 1985, 1986, 1987 Free Software Foundation, Inc.
                      3: 
                      4: ;; This file is part of GNU Emacs.
                      5: 
                      6: ;; GNU Emacs is distributed in the hope that it will be useful,
                      7: ;; but WITHOUT ANY WARRANTY.  No author or distributor
                      8: ;; accepts responsibility to anyone for the consequences of using it
                      9: ;; or for whether it serves any particular purpose or works at all,
                     10: ;; unless he says so in writing.  Refer to the GNU Emacs General Public
                     11: ;; License for full details.
                     12: 
                     13: ;; Everyone is granted permission to copy, modify and redistribute
                     14: ;; GNU Emacs, but only under the conditions described in the
                     15: ;; GNU Emacs General Public License.   A copy of this license is
                     16: ;; supposed to have been given to you along with GNU Emacs so you
                     17: ;; can know your rights and responsibilities.  It should be in a
                     18: ;; file named COPYING.  Among other things, the copyright notice
                     19: ;; and this notice must be preserved on all copies.
                     20: 
                     21: 
                     22: (defvar display-time-process nil)
                     23: 
                     24: (defvar display-time-interval 60
                     25:   "*Seconds between updates of time in the mode line.")
                     26: 
                     27: (defvar display-time-string nil)
                     28: 
                     29: (defun display-time ()
                     30:   "Display current time and load level in mode line of each buffer.
                     31: Updates automatically every minute.
                     32: If display-time-day-and-date is non-nil, the current day and date
                     33: are displayed as well."
                     34:   (interactive)
                     35:   (let ((live (and display-time-process
                     36:                   (eq (process-status display-time-process) 'run))))
                     37:     (if (not live)
                     38:        (save-excursion
                     39:          (if display-time-process
                     40:              (delete-process display-time-process))
                     41:          (or global-mode-string (setq global-mode-string '("")))
                     42:          (or (memq 'display-time-string global-mode-string)
                     43:              (setq global-mode-string
                     44:                    (append global-mode-string '(display-time-string))))
                     45:          (setq display-time-string "time and load")
                     46:          (setq display-time-process
                     47:                (start-process "display-time" nil
                     48:                               "loadst" 
                     49:                               "-n" (int-to-string display-time-interval)))
                     50:          (process-kill-without-query display-time-process)
                     51:          (set-process-sentinel display-time-process 'display-time-sentinel)
                     52:          (set-process-filter display-time-process 'display-time-filter)))))
                     53: 
                     54: (defun display-time-sentinel (proc reason)
                     55:   (or (eq (process-status proc) 'run)
                     56:       (setq display-time-string ""))
                     57:   ;; Force mode-line updates
                     58:   (save-excursion (set-buffer (other-buffer)))
                     59:   (set-buffer-modified-p (buffer-modified-p))
                     60:   (sit-for 0))
                     61: 
                     62: (defun display-time-filter (proc string)
                     63:   ;; Desired data can't need more than the last 30 chars,
                     64:   ;; so save time by flushing the rest.
                     65:   ;; This way, if we have many different times all collected at once,
                     66:   ;; we can discard all but the last few very fast.
                     67:   (if (> (length string) 30)
                     68:       (setq string (substring string -30)))
                     69:   ;; Now discard all but the very last one.
                     70:   (while (and (> (length string) 4)
                     71:              (string-match "[0-9]+:[0-9][0-9].." string 4))
                     72:     (setq string (substring string (match-beginning 0))))
                     73:   (if (string-match "[^0-9][0-9]+:" string)
                     74:       (setq string (substring string 0 (1+ (match-beginning 0)))))
                     75:   ;; Append the date if desired.
                     76:   (if display-time-day-and-date
                     77:       (setq string (concat (substring (current-time-string) 0 11) string)))
                     78:   ;; Install the new time for display.
                     79:   (setq display-time-string string)
                     80:   ;; Force redisplay of all buffers' mode lines to be considered.
                     81:   (save-excursion (set-buffer (other-buffer)))
                     82:   (set-buffer-modified-p (buffer-modified-p))
                     83:   ;; Do redisplay right now, if no input pending.
                     84:   (sit-for 0))

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.