GNU ELPA - tmr

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Description
Set timers using a convenient notation
Latest
tmr-1.0.0.tar (.sig), 2024-Aug-30, 150 KiB
Maintainer
Protesilaos Stavrou <info@protesilaos.com>
Website
https://github.com/protesilaos/tmr
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Manual
tmr

To install this package from Emacs, use package-install or list-packages.

Full description

This manual, written by Protesilaos Stavrou, describes the customization options for tmr (or TMR, TMR May Ring, …), and provides every other piece of information pertinent to it. The name of the package is pronounced as “timer” or “T-M-R”.

The documentation furnished herein corresponds to stable version 1.0.0, released on 2024-08-30. Any reference to a newer feature which does not yet form part of the latest tagged commit, is explicitly marked as such.

Current development target is 1.1.0-dev.

1. COPYING

Copyright (C) 2021-2023 Free Software Foundation, Inc.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, with the Front-Cover Texts being “A GNU Manual,” and with the Back-Cover Texts as in (a) below. A copy of the license is included in the section entitled “GNU Free Documentation License.”

(a) The FSF’s Back-Cover Text is: “You have the freedom to copy and modify this GNU manual.”

2. Overview

TMR is an Emacs package that provides facilities for setting timers using a convenient notation. The first point of entry is the tmr command. It prompts for a unit of time, which is represented as a string that consists of a number and, optionally, a single character suffix which specifies the unit of time. Without a suffix, the number is interpreted as a count in minutes. Valid input formats:

Input Meaning
5 5 minutes
5m 5 minutes
5s 5 seconds
5h 5 hours

The input can be a floating point:

Input Meaning
1.5 1.5 minutes (90 seconds)
1.5h 1.5 hours (90 minutes)

The input can also be an absolute time, such as 16:00 or 16:00:30. It sets a timer from present time until the one specified.

If tmr is called with an optional prefix argument (C-u with default key bindings), it asks for a description to be associated with the given timer.

An alternative to the tmr command is tmr-with-details. The difference between the two is that the latter always prompts for a description and if the timer should be acknowledged.

The command tmr-edit-description can change the description a given timer object.

The command tmr-toggle-acknowledge toggles the acknowledge flag of a given timer object. A timer that needs to be acknowledged prompts for confirmation after it elapses. The user can either confirm and thus dismiss the timer, or set a new duration for the next reminder, using the familiar TMR input.

The user option tmr-descriptions-list defines the completion candidates that are shown at the description prompt. Its value can be either a list of strings or the symbol of a variable that holds a list of strings. The default value of tmr-description-history, is the name of a variable that contains input provided by the user at the relevant prompt of the tmr and tmr-with-details commands.

When the timer is set, a message is sent to the echo area recording the current time and the point in the future when the timer elapses. Echo area messages can be reviewed with the view-echo-area-messages which is bound to C-h e by default. To check all timers, use the command tmr-tabulated-view, which has more features than the generic *Messages* buffer (Grid view).

The tmr-cancel command cancels running timers without erasing them from the list of created timer objects. Timers at the completion prompt are described by the exact time they were set and the input that was used to create them, including the optional description that tmr and tmr-with-details accept.

The tmr-remove command is like tmr-cancel, except it is not limited to active timers: it can target elapsed ones as well.

The tmr-clone command directly copies the duration and optional description of a timer into a new one. With an optional prefix argument (C-u by default), this command prompts for a duration. If a double prefix argument is supplied (C-u C-u), the command asks for a duration and then a description. The default values of such prompts are those of the original timer.

The command tmr-reschedule changes the duration of the given timer to a new one provided at the prompt. In practice this is a shortcut to (i) cloning the timer, (ii) prompting for duration, and (iii) cancelling the original timer.

The tmr-remove-finished command deletes all elapsed timers from the list of timers. This means that they can no longer be cloned.

By default, TMR uses minibuffer completion to pick a timer object in operations such as cloning and cancelling. If the user option tmr-confirm-single-timer is set to nil, TMR will not use completion when there is only one timer available: it will perform the specified command outright.

Timers have hooks associated with their creation, cancellation, and completion (Hooks). TMR can also integrate with the desktop environment to send notifications (Sound and desktop notifications).

TMR does not specify global key bindings. Instead, it sets up the tmr-prefix-map, which specifies keys for the relevant commands. The user has the option to either bind the map to a prefix key, such as C-c t (so tmr is C-c t t), or bind individual commands to the desired keys (Sample configuration).

2.1. Grid view

Timers can be viewed in a grid with tmr-tabulated-view (alias tmr-list-timers). The data is placed in the *tmr-tabulated-view* buffer and looks like this:

Start      End        Remaining  Description
10:11:49   10:11:54   ✔
10:11:36   10:31:36   19m 35s
10:11:32   10:26:32   14m 31s    Yet another test
10:11:16   10:21:16   9m 14s     Testing how it works

If a timer has elapsed, it has a check mark associated with it, otherwise the Remaining column shows the time left. A Description is shown only if it is provided while setting the timer, otherwise the field is left blank.

Inside this grid view, all TMR commands that operate on timer objects automatically target the one at point. Whereas the global behaviour is to use minibuffer completion to pick a timer to operate on.

The tmr-tabulated-view command relies on Emacs’ tabulated-list-mode. From the *tmr-tabulated-view* buffer, one can invoke the command describe-mode (C-h m with standard key bindings) to learn about the applicable functionality, such as how to expand/contract columns and toggle sorting.

While in this grid view, one can perform all the operations on timers we have already covered herein (the C-h m will show you their key bindings in this mode).

2.2. Hooks

TMR provides the following hooks:

tmr-timer-created-functions
This is triggered by the tmr command. By default, it prints a message in the echo area showing the newly created timer’s start and end time as well as its optional description (if provided).
tmr-timer-finished-functions
This runs when a timer elapses. By default, it (i) produces a desktop notification which describes the timer’s start/end time and optional description (if available), (ii) plays an alarm sound (Sound and desktop notifications), and (iii) prints a message in the echo area which is basically the same as the desktop notification.
tmr-timer-cancelled-functions
This is called by tmr-cancel. By default, it prints a message in the echo area describing the timer that was cancelled.

2.3. Sound and desktop notifications

Once the timer has run its course, it produces a desktop notification and plays an alarm sound. The notification’s message is practically the same as that which is sent to the echo area.

The sound file for the alarm is defined in tmr-sound-file, while the urgency of the notification can be set through the user option tmr-notification-urgency. Note that it is up to the desktop environment or notification daemon to decide how to handle the urgency value.

If the tmr-sound-file is nil, or the file is not found, no sound will be played.

Sound playback depends on the ffplay executable which is part of ffmpeg.

Desktop notifications work only if Emacs is built with DBus functionality. This is the norm. If such functionality is not available, TMR will issue a warning informing the user accordingly.

2.4. Minibuffer histories

TMR defines two variables that store user input: tmr-duration-history and tmr-description-history. Minibuffer histories can persist between sessions if the user enables the built-in savehist library. Sample configuration:

(require 'savehist)
(setq savehist-file (locate-user-emacs-file "savehist"))
(setq history-length 500)
(setq history-delete-duplicates t)
(setq savehist-save-minibuffer-history t)
(add-hook 'after-init-hook #'savehist-mode)

3. Installation

3.1. GNU ELPA package

The package is available as tmr. Simply do:

M-x package-refresh-contents
M-x package-install

And search for it.

GNU ELPA provides the latest stable release. Those who prefer to follow the development process in order to report bugs or suggest changes, can use the version of the package from the GNU-devel ELPA archive. Read: https://protesilaos.com/codelog/2022-05-13-emacs-elpa-devel/.

3.2. Manual installation

Assuming your Emacs files are found in ~/.emacs.d/, execute the following commands in a shell prompt:

cd ~/.emacs.d

# Create a directory for manually-installed packages
mkdir manual-packages

# Go to the new directory
cd manual-packages

# Clone this repo, naming it "tmr"
git clone https://git.sr.ht/~protesilaos/tmr tmr

Finally, in your init.el (or equivalent) evaluate this:

;; Make Elisp files in that directory available to the user.
(add-to-list 'load-path "~/.emacs.d/manual-packages/tmr")

Everything is in place to set up the package.

4. Sample configuration

;; Set to nil to disable the sound
(setq tmr-sound-file "/usr/share/sounds/freedesktop/stereo/alarm-clock-elapsed.oga")

;; Desktop notification urgency level
(setq tmr-notification-urgency 'normal)

;; Read the `tmr-descriptions-list' doc string
(setq tmr-descriptions-list 'tmr-description-history)

;; Set global prefix bindings (autoloaded):
(define-key global-map "\C-ct" 'tmr-prefix-map)

;; Alternatively bind tmr command (autoloaded):
(define-key global-map "\C-ct" 'tmr)

5. Integration with Embark

The embark package provides standards-compliant infrastructure to run context-dependent actions on all sorts of targets (symbol at point, current completion candidate, etc.). TMR is set up to make its timer objects recognisable by Embark and registers the tmr-action-map in Embark.

6. Acknowledgements

TMR is meant to be a collective effort. Every bit of help matters.

Authors
Protesilaos Stavrou (maintainer), Damien Cassou, Daniel Mendler.
Contributions to the code or manual
Christian Tietze, Ed Tavinor, Nathan R. DeGruchy.

7. GNU Free Documentation License


                GNU Free Documentation License
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replace the "with...Texts." line with this:

    with the Invariant Sections being LIST THEIR TITLES, with the
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If you have Invariant Sections without Cover Texts, or some other
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Old versions

tmr-0.4.0.tar.lz2024-Mar-3127.0 KiB
tmr-0.3.1.tar.lz2022-Jun-0922.5 KiB
tmr-0.3.0.tar.lz2022-May-1718.1 KiB
tmr-0.2.3.tar.lz2022-Apr-2813.7 KiB
tmr-0.2.2.tar.lz2022-Apr-2213.1 KiB
tmr-0.2.1.tar.lz2022-Apr-2113.1 KiB

News

This document contains the release notes for each tagged commit on the project's main git repository: https://github.com/protesilaos/tmr.

The newest release is at the top. For further details, please consult the manual: https://protesilaos.com/emacs/tmr.

Table of Contents

Version 1.0.0 on 2024-08-30

This version adds quality-of-life improvements to an already stable base.

The tmr-with-details supersedes the tmr-with-description

The tmr-with-description would always prompt for a time input and then a description of the resulting timer object. We now provide a more general command, tmr-with-details, which does this in addition to an extra prompt for an acknowledgement. What an "acknowledgement" is, is documented in the following section.

Timers can now be "acknowledged"

Normally, when a timer elapses it does not stick around to notify the user again and again. This means that the user may miss the one notification if, say, they were away from the computer. As such, we now provide an opt-in mechanism where a timer persists until it is explicitly acknowledged as finished. The acknowledgement is either an additional duration for the timer to produce another notification in the future, or an explicit consent from the timer to count as finished. The goal is to help the user never miss a timer.

Setting up an acknowledgement can be done in the following ways:

  • Call the standard tmr command with a prefix argument (C-u by default). This will make it prompt for a description and an acknowledgement.
  • Use the new command tmr-with-details, which asks for a timer input, a description, and whether to include an acknowledgement prompt.
  • Use the new command tmr-toggle-acknowledge, which will prompt for a timer and then toggle the acknowledgement status on/off. In this scenario, the timer already exists (e.g. it was created with tmr without a prefix argument).

All timers are listed in a nice list with the command tmr-tabulated-view. An extra column will indicate their acknowledgement status.

Thanks to Daniel Mendler for contributing this feature. This was done in the form of patches, sent via email. Daniel has assigned copyright to the Free Software Foundation.

The tmr-list-timers is an alias for tmr-tabulated-view

Perhaps the "list timers" is a more meaningful description of what the command does, as opposed to "tabulated view".

Use the tmr-prefix-map

We now define a prefix keymap that users can bind directly to a key and get all the TMR commands in one go. For example, this adds all TMR commands behind the C-c t prefix:

(define-key global-map (kbd "C-c t") 'tmr-prefix-map)

Thanks to Daniel Mendler for this patch.

TMR uses its own faces

Theme developers or users can now modify how the various TMR indicators look by tweaking the faces we provide:

  • tmr-duration
  • tmr-description
  • tmr-start-time
  • tmr-end-time
  • tmr-is-acknowledged
  • tmr-must-be-acknowledged
  • tmr-finished

The default values inherit from basic faces that should be supported everywhere.

Existing users will not notice any visual difference, other things being equal.

Fixed some typos in the manual

Thanks to Ed Tavinor for the contribution. The change pertains to … …