85 lines
2.7 KiB
EmacsLisp
85 lines
2.7 KiB
EmacsLisp
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;;; sx-time.el --- time -*- lexical-binding: t; -*-
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;; Copyright (C) 2014 Sean Allred
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;; Author: Sean Allred <code@seanallred.com>
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;; This program 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 3 of the License, or
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;; (at your option) any later version.
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;; This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; This file provides functions for manipulating and displaying
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;; timestamps.
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;;; Code:
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(require 'time-date)
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(defconst sx-time-seconds-to-string
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;; (LIMIT NAME VALUE)
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;; We use an entry if the number of seconds in question is less than
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;; LIMIT, but more than the previous entry's LIMIT.
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;; For instance, if time is less than 100 sec, we write it in seconds;
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;; if it is between 100 and 6000 sec, we use minutes.
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;; VALUE is the actual number of seconds which NAME represents.
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'((100 "s" 1)
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(6000 "m" 60.0)
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(108000 "h" 3600.0)
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(3456000 "d" 86400.0)
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(31622400 "mo" 2628000.0)
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(nil "y" 31557600.0))
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"Auxiliary variable used by `sx-time-since'.")
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(defun sx-time-since (time)
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"Convert the time interval since TIME (in seconds) to a short string."
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(let ((delay (- (float-time) time)))
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(concat
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(if (> 0 delay) "-" "")
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(if (= 0 delay) "0s"
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(setq delay (abs delay))
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(let ((sts sx-time-seconds-to-string) here)
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(while (and (car (setq here (pop sts)))
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(<= (car here) delay)))
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(concat (format "%.0f" (/ delay (car (cddr here))))
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(cadr here)))))))
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(defcustom sx-time-date-format-year "%H:%M %e %b %Y"
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"Format used for dates on a past year.
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See also `sx-time-date-format'."
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:type 'string
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:group 'sx)
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(defcustom sx-time-date-format "%H:%M - %d %b"
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"Format used for dates on this year.
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See also `sx-time-date-format-year'."
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:type 'string
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:group 'sx)
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(defun sx-time-seconds-to-date (seconds)
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"Return the integer SECONDS as a date string."
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(let ((time (seconds-to-time seconds)))
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(format-time-string
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(if (string= (format-time-string "%Y")
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(format-time-string "%Y" time))
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sx-time-date-format
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sx-time-date-format-year)
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time)))
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(provide 'sx-time)
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;;; sx-time.el ends here
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;; Local Variables:
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;; indent-tabs-mode: nil
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;; End:
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