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+;;; org-timer.el --- Timer code for Org mode -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+;; Author: Carsten Dominik <carsten.dominik@gmail.com>
+;; Keywords: outlines, hypermedia, calendar, wp
+;; Homepage: https://orgmode.org
+;;
+;; This file is part of GNU Emacs.
+;;
+;; GNU Emacs is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;;
+;;; Commentary:
+
+;; This file implements two types of timers for Org buffers:
+;;
+;; - A relative timer that counts up (from 0 or a specified offset)
+;; - A countdown timer that counts down from a specified time
+;;
+;; The relative and countdown timers differ in their entry points.
+;; Use `org-timer' or `org-timer-start' to start the relative timer,
+;; and `org-timer-set-timer' to start the countdown timer.
+
+;;; Code:
+
+(require 'cl-lib)
+(require 'org-clock)
+
+(declare-function org-agenda-error "org-agenda" ())
+
+(defvar org-timer-start-time nil
+ "t=0 for the running timer.")
+
+(defvar org-timer-pause-time nil
+ "Time when the timer was paused.")
+
+(defvar org-timer-countdown-timer nil
+ "Current countdown timer.
+This is a timer object if there is an active countdown timer,
+`paused' if there is a paused countdown timer, and nil
+otherwise.")
+
+(defvar org-timer-countdown-timer-title nil
+ "Title for notification displayed when a countdown finishes.")
+
+(defconst org-timer-re "\\([-+]?[0-9]+\\):\\([0-9]\\{2\\}\\):\\([0-9]\\{2\\}\\)"
+ "Regular expression used to match timer stamps.")
+
+(defcustom org-timer-format "%s "
+ "The format to insert the time of the timer.
+This format must contain one instance of \"%s\" which will be replaced by
+the value of the timer."
+ :group 'org-time
+ :type 'string)
+
+(defcustom org-timer-default-timer "0"
+ "The default timer when a timer is set, in minutes or hh:mm:ss format.
+When 0, the user is prompted for a value."
+ :group 'org-time
+ :version "26.1"
+ :package-version '(Org . "8.3")
+ :type 'string)
+
+(defcustom org-timer-display 'mode-line
+ "Define where running timer is displayed, if at all.
+When a timer is running, Org can display it in the mode line
+and/or frame title. Allowed values are:
+
+both displays in both mode line and frame title
+mode-line displays only in mode line (default)
+frame-title displays only in frame title
+nil current timer is not displayed"
+ :group 'org-time
+ :type '(choice
+ (const :tag "Mode line" mode-line)
+ (const :tag "Frame title" frame-title)
+ (const :tag "Both" both)
+ (const :tag "None" nil)))
+
+(defvar org-timer-start-hook nil
+ "Hook run after relative timer is started.")
+
+(defvar org-timer-stop-hook nil
+ "Hook run before relative or countdown timer is stopped.")
+
+(defvar org-timer-pause-hook nil
+ "Hook run before relative or countdown timer is paused.")
+
+(defvar org-timer-continue-hook nil
+ "Hook run after relative or countdown timer is continued.")
+
+(defvar org-timer-set-hook nil
+ "Hook run after countdown timer is set.")
+
+(defvar org-timer-done-hook nil
+ "Hook run after countdown timer reaches zero.")
+
+;;;###autoload
+(defun org-timer-start (&optional offset)
+ "Set the starting time for the relative timer to now.
+When called with prefix argument OFFSET, prompt the user for an offset time,
+with the default taken from a timer stamp at point, if any.
+If OFFSET is a string or an integer, it is directly taken to be the offset
+without user interaction.
+When called with a double prefix arg, all timer strings in the active
+region will be shifted by a specific amount. You will be prompted for
+the amount, with the default to make the first timer string in
+the region 0:00:00."
+ (interactive "P")
+ (cond
+ ((equal offset '(16))
+ (call-interactively 'org-timer-change-times-in-region))
+ (org-timer-countdown-timer
+ (user-error "Countdown timer is running. Cancel first"))
+ (t
+ (let (delta def s)
+ (if (not offset)
+ (setq org-timer-start-time (current-time))
+ (cond
+ ((integerp offset) (setq delta offset))
+ ((stringp offset) (setq delta (org-timer-hms-to-secs offset)))
+ (t
+ (setq def (if (org-in-regexp org-timer-re)
+ (match-string 0)
+ "0:00:00")
+ s (read-string
+ (format "Restart timer with offset [%s]: " def)))
+ (unless (string-match "\\S-" s) (setq s def))
+ (setq delta (org-timer-hms-to-secs (org-timer-fix-incomplete s)))))
+ (setq org-timer-start-time (org-time-since delta)))
+ (setq org-timer-pause-time nil)
+ (org-timer-set-mode-line 'on)
+ (message "Timer start time set to %s, current value is %s"
+ (format-time-string "%T" org-timer-start-time)
+ (org-timer-secs-to-hms (or delta 0)))
+ (run-hooks 'org-timer-start-hook)))))
+
+;;;###autoload
+(defun org-timer-pause-or-continue (&optional stop)
+ "Pause or continue the relative or countdown timer.
+With prefix arg STOP, stop it entirely."
+ (interactive "P")
+ (cond
+ (stop (org-timer-stop))
+ ((not org-timer-start-time) (error "No timer is running"))
+ (org-timer-pause-time
+ (let ((start-secs (float-time org-timer-start-time))
+ (pause-secs (float-time org-timer-pause-time)))
+ (if org-timer-countdown-timer
+ (let ((new-secs (- start-secs pause-secs)))
+ (setq org-timer-countdown-timer
+ (org-timer--run-countdown-timer
+ new-secs org-timer-countdown-timer-title))
+ (setq org-timer-start-time (org-time-add nil new-secs)))
+ (setq org-timer-start-time
+ (org-time-since (- pause-secs start-secs))))
+ (setq org-timer-pause-time nil)
+ (org-timer-set-mode-line 'on)
+ (run-hooks 'org-timer-continue-hook)
+ (message "Timer continues at %s" (org-timer-value-string))))
+ (t
+ ;; pause timer
+ (when org-timer-countdown-timer
+ (cancel-timer org-timer-countdown-timer)
+ (setq org-timer-countdown-timer 'paused))
+ (run-hooks 'org-timer-pause-hook)
+ (setq org-timer-pause-time (current-time))
+ (org-timer-set-mode-line 'paused)
+ (message "Timer paused at %s" (org-timer-value-string)))))
+
+;;;###autoload
+(defun org-timer-stop ()
+ "Stop the relative or countdown timer."
+ (interactive)
+ (unless org-timer-start-time
+ (user-error "No timer running"))
+ (when (timerp org-timer-countdown-timer)
+ (cancel-timer org-timer-countdown-timer))
+ (run-hooks 'org-timer-stop-hook)
+ (setq org-timer-start-time nil
+ org-timer-pause-time nil
+ org-timer-countdown-timer nil)
+ (org-timer-set-mode-line 'off)
+ (message "Timer stopped"))
+
+;;;###autoload
+(defun org-timer (&optional restart no-insert)
+ "Insert a H:MM:SS string from the timer into the buffer.
+The first time this command is used, the timer is started.
+
+When used with a `\\[universal-argument]' prefix, force restarting the timer.
+
+When used with a `\\[universal-argument] \\[universal-argument]' \
+prefix, change all the timer strings
+in the region by a fixed amount. This can be used to re-calibrate
+a timer that was not started at the correct moment.
+
+If NO-INSERT is non-nil, return the string instead of inserting
+it in the buffer."
+ (interactive "P")
+ (if (equal restart '(16))
+ (org-timer-start restart)
+ (when (or (equal restart '(4)) (not org-timer-start-time))
+ (org-timer-start))
+ (if no-insert
+ (org-timer-value-string)
+ (insert (org-timer-value-string)))))
+
+(defun org-timer-value-string ()
+ "Return current timer string."
+ (format org-timer-format
+ (org-timer-secs-to-hms
+ (let ((time (- (float-time org-timer-pause-time)
+ (float-time org-timer-start-time))))
+ (abs (floor (if org-timer-countdown-timer (- time) time)))))))
+
+;;;###autoload
+(defun org-timer-change-times-in-region (beg end delta)
+ "Change all h:mm:ss time in region by a DELTA."
+ (interactive
+ "r\nsEnter time difference like \"-1:08:26\". Default is first time to zero: ")
+ (let ((re "[-+]?[0-9]+:[0-9]\\{2\\}:[0-9]\\{2\\}") p)
+ (unless (string-match "\\S-" delta)
+ (save-excursion
+ (goto-char beg)
+ (when (re-search-forward re end t)
+ (setq delta (match-string 0))
+ (if (equal (string-to-char delta) ?-)
+ (setq delta (substring delta 1))
+ (setq delta (concat "-" delta))))))
+ (setq delta (org-timer-hms-to-secs (org-timer-fix-incomplete delta)))
+ (when (= delta 0) (error "No change"))
+ (save-excursion
+ (goto-char end)
+ (while (re-search-backward re beg t)
+ (setq p (point))
+ (replace-match
+ (save-match-data
+ (org-timer-secs-to-hms (+ (org-timer-hms-to-secs (match-string 0)) delta)))
+ t t)
+ (goto-char p)))))
+
+;;;###autoload
+(defun org-timer-item (&optional arg)
+ "Insert a description-type item with the current timer value."
+ (interactive "P")
+ (let ((itemp (org-in-item-p)) (pos (point)))
+ (cond
+ ;; In a timer list, insert with `org-list-insert-item',
+ ;; then fix the list.
+ ((and itemp (goto-char itemp) (org-at-item-timer-p))
+ (let* ((struct (org-list-struct))
+ (prevs (org-list-prevs-alist struct))
+ (s (concat (org-timer (when arg '(4)) t) ":: ")))
+ (setq struct (org-list-insert-item pos struct prevs nil s))
+ (org-list-write-struct struct (org-list-parents-alist struct))
+ (looking-at org-list-full-item-re)
+ (goto-char (match-end 0))))
+ ;; In a list of another type, don't break anything: throw an error.
+ (itemp (goto-char pos) (error "This is not a timer list"))
+ ;; Else, start a new list.
+ (t
+ (beginning-of-line)
+ (org-indent-line)
+ (insert "- ")
+ (org-timer (when arg '(4)))
+ (insert ":: ")))))
+
+(defun org-timer-fix-incomplete (hms)
+ "If hms is a H:MM:SS string with missing hour or hour and minute, fix it."
+ (if (string-match "\\(?:\\([0-9]+:\\)?\\([0-9]+:\\)\\)?\\([0-9]+\\)" hms)
+ (replace-match
+ (format "%d:%02d:%02d"
+ (if (match-end 1) (string-to-number (match-string 1 hms)) 0)
+ (if (match-end 2) (string-to-number (match-string 2 hms)) 0)
+ (string-to-number (match-string 3 hms)))
+ t t hms)
+ (error "Cannot parse HMS string \"%s\"" hms)))
+
+(defun org-timer-hms-to-secs (hms)
+ "Convert h:mm:ss string to an integer time.
+If the string starts with a minus sign, the integer will be negative."
+ (if (not (string-match
+ "\\([-+]?[0-9]+\\):\\([0-9]\\{2\\}\\):\\([0-9]\\{2\\}\\)"
+ hms))
+ 0
+ (let* ((h (string-to-number (match-string 1 hms)))
+ (m (string-to-number (match-string 2 hms)))
+ (s (string-to-number (match-string 3 hms)))
+ (sign (equal (substring (match-string 1 hms) 0 1) "-")))
+ (setq h (abs h))
+ (* (if sign -1 1) (+ s (* 60 (+ m (* 60 h))))))))
+
+(defun org-timer-secs-to-hms (s)
+ "Convert integer S into h:mm:ss.
+If the integer is negative, the string will start with \"-\"."
+ (let (sign m h)
+ (setq sign (if (< s 0) "-" "")
+ s (abs s)
+ m (/ s 60) s (- s (* 60 m))
+ h (/ m 60) m (- m (* 60 h)))
+ (format "%s%d:%02d:%02d" sign h m s)))
+
+(defvar org-timer-mode-line-timer nil)
+(defvar org-timer-mode-line-string nil)
+
+(defun org-timer-set-mode-line (value)
+ "Set the mode-line display for relative or countdown timer.
+VALUE can be `on', `off', or `paused'."
+ (when (or (eq org-timer-display 'mode-line)
+ (eq org-timer-display 'both))
+ (or global-mode-string (setq global-mode-string '("")))
+ (or (memq 'org-timer-mode-line-string global-mode-string)
+ (setq global-mode-string
+ (append global-mode-string '(org-timer-mode-line-string)))))
+ (when (or (eq org-timer-display 'frame-title)
+ (eq org-timer-display 'both))
+ (or (memq 'org-timer-mode-line-string frame-title-format)
+ (setq frame-title-format
+ (append frame-title-format '(org-timer-mode-line-string)))))
+ (cl-case value
+ (off
+ (when org-timer-mode-line-timer
+ (cancel-timer org-timer-mode-line-timer)
+ (setq org-timer-mode-line-timer nil))
+ (when (or (eq org-timer-display 'mode-line)
+ (eq org-timer-display 'both))
+ (setq global-mode-string
+ (delq 'org-timer-mode-line-string global-mode-string)))
+ (when (or (eq org-timer-display 'frame-title)
+ (eq org-timer-display 'both))
+ (setq frame-title-format
+ (delq 'org-timer-mode-line-string frame-title-format)))
+ (force-mode-line-update))
+ (paused
+ (when org-timer-mode-line-timer
+ (cancel-timer org-timer-mode-line-timer)
+ (setq org-timer-mode-line-timer nil)))
+ (on
+ (when (or (eq org-timer-display 'mode-line)
+ (eq org-timer-display 'both))
+ (or global-mode-string (setq global-mode-string '("")))
+ (or (memq 'org-timer-mode-line-string global-mode-string)
+ (setq global-mode-string
+ (append global-mode-string '(org-timer-mode-line-string)))))
+ (when (or (eq org-timer-display 'frame-title)
+ (eq org-timer-display 'both))
+ (or (memq 'org-timer-mode-line-string frame-title-format)
+ (setq frame-title-format
+ (append frame-title-format '(org-timer-mode-line-string)))))
+ (org-timer-update-mode-line)
+ (when org-timer-mode-line-timer
+ (cancel-timer org-timer-mode-line-timer)
+ (setq org-timer-mode-line-timer nil))
+ (when org-timer-display
+ (setq org-timer-mode-line-timer
+ (run-with-timer 1 1 #'org-timer-update-mode-line))))))
+
+(defun org-timer-update-mode-line ()
+ "Update the timer time in the mode line."
+ (if org-timer-pause-time
+ nil
+ (setq org-timer-mode-line-string
+ (concat " <" (substring (org-timer-value-string) 0 -1) ">"))
+ (force-mode-line-update)))
+
+(defun org-timer-show-remaining-time ()
+ "Display the remaining time before the timer ends."
+ (interactive)
+ (message
+ (if (not org-timer-countdown-timer)
+ "No timer set"
+ (format-seconds
+ "%m minute(s) %s seconds left before next time out"
+ ;; Note: Once our minimal require is Emacs 27, we can drop this
+ ;; org-time-convert-to-integer call.
+ (org-time-convert-to-integer
+ (org-time-subtract (timer--time org-timer-countdown-timer) nil))))))
+
+;;;###autoload
+(defun org-timer-set-timer (&optional opt)
+ "Prompt for a duration in minutes or hh:mm:ss and set a timer.
+
+If `org-timer-default-timer' is not \"0\", suggest this value as
+the default duration for the timer. If a timer is already set,
+prompt the user if she wants to replace it.
+
+Called with a numeric prefix argument, use this numeric value as
+the duration of the timer in minutes.
+
+Called with a \\[universal-argument] prefix arguments, use `org-timer-default-timer'
+without prompting the user for a duration.
+
+With two \\[universal-argument] prefix arguments, use `org-timer-default-timer'
+without prompting the user for a duration and automatically
+replace any running timer.
+
+By default, the timer duration will be set to the number of
+minutes in the Effort property, if any. You can ignore this by
+using three \\[universal-argument] prefix arguments."
+ (interactive "P")
+ (when (and org-timer-start-time
+ (not org-timer-countdown-timer))
+ (user-error "Relative timer is running. Stop first"))
+ (let* ((default-timer
+ ;; `org-timer-default-timer' used to be a number, don't choke:
+ (if (numberp org-timer-default-timer)
+ (number-to-string org-timer-default-timer)
+ org-timer-default-timer))
+ (effort-minutes (let ((effort (org-entry-get nil org-effort-property)))
+ (when (org-string-nw-p effort)
+ (floor (org-duration-to-minutes effort)))))
+ (minutes (or (and (numberp opt) (number-to-string opt))
+ (and (not (equal opt '(64)))
+ effort-minutes
+ (number-to-string effort-minutes))
+ (and (consp opt) default-timer)
+ (and (stringp opt) opt)
+ (read-from-minibuffer
+ "How much time left? (minutes or h:mm:ss) "
+ (and (not (string-equal default-timer "0")) default-timer)))))
+ (when (string-match "\\`[0-9]+\\'" minutes)
+ (setq minutes (concat minutes ":00")))
+ (if (not (string-match "[0-9]+" minutes))
+ (org-timer-show-remaining-time)
+ (let ((secs (org-timer-hms-to-secs (org-timer-fix-incomplete minutes))))
+ (if (and org-timer-countdown-timer
+ (not (or (equal opt '(16))
+ (y-or-n-p "Replace current timer? "))))
+ (message "No timer set")
+ (when (timerp org-timer-countdown-timer)
+ (cancel-timer org-timer-countdown-timer))
+ (setq org-timer-countdown-timer-title
+ (org-timer--get-timer-title))
+ (setq org-timer-countdown-timer
+ (org-timer--run-countdown-timer
+ secs org-timer-countdown-timer-title))
+ (run-hooks 'org-timer-set-hook)
+ (setq org-timer-start-time (org-time-add nil secs))
+ (setq org-timer-pause-time nil)
+ (org-timer-set-mode-line 'on))))))
+
+(defun org-timer--run-countdown-timer (secs title)
+ "Start countdown timer that will last SECS.
+TITLE will be appended to the notification message displayed when
+time is up."
+ (let ((msg (format "%s: time out" title))
+ (sound org-clock-sound))
+ (run-with-timer
+ secs nil (lambda ()
+ (setq org-timer-countdown-timer nil
+ org-timer-start-time nil)
+ (org-notify msg sound)
+ (org-timer-set-mode-line 'off)
+ (run-hooks 'org-timer-done-hook)))))
+
+(defun org-timer--get-timer-title ()
+ "Construct timer title.
+Try to use an Org header, otherwise use the buffer name."
+ (cond
+ ((derived-mode-p 'org-agenda-mode)
+ (let* ((marker (or (get-text-property (point) 'org-marker)))
+ (hdmarker (or (get-text-property (point) 'org-hd-marker)
+ marker)))
+ (when (and marker (marker-buffer marker))
+ (with-current-buffer (marker-buffer marker)
+ (org-with-wide-buffer
+ (goto-char hdmarker)
+ (org-show-entry)
+ (or (ignore-errors (org-get-heading))
+ (buffer-name (buffer-base-buffer))))))))
+ ((derived-mode-p 'org-mode)
+ (ignore-errors (org-get-heading)))
+ (t (buffer-name (buffer-base-buffer)))))
+
+(provide 'org-timer)
+
+;; Local variables:
+;; generated-autoload-file: "org-loaddefs.el"
+;; End:
+
+;;; org-timer.el ends here