#+TITLE: org-clock-waybar – Export the currently clocked-in task to be displayed on Waybar

* Installation

Put ~org-clock-waybar.el~ somewhere in your ~load-path~, and ~(require 'org-clock-waybar)~.

MELPA version may come soon.

** Quelpa

If you only have [[https://github.com/quelpa/quelpa][quelpa]] installed:

#+begin_src emacs-lisp
(quelpa
 '(org-clock-waybar
   :fetcher git
   :url "https://gitea.polonkai.eu/gergely/org-clock-waybar.git"))
#+end_src

or, if you have [[https://github.com/quelpa/quelpa-use-package][quelpa-use-package] installed,
too:

#+begin_src emacs-lisp
(quelpa-use-package org-clock-waybar
  :quelpa (org-clock-waybar
           :fetcher git
           :url "https://gitea.polonkai.eu/gergely/org-clock-waybar.git"))
#+end_src

* Customization

To see a list of configurable parts, use ~M-x customize-group <RET> org-clock-waybar~.

You can set the file to be written by customizing ~org-clock-waybar-filename~; it
defaults to ~$XDG_CACHE_HOME/waybar-current-task.json~ (~$XDG_CACHE_HOME~ defaults
to ~$HOME/.cache~ on XDG compatible systems, like Linux.)

* Waybar configuration

To add the current task to Waybar, add this snippet to your config:

#+begin_src json
"custom/org": {
  "format": " {}",
  "return-type": "json",
  "restart-interval": 5,
  "exec": "cat /home/yourusername/.cache/waybar-current-task.json"
}
#+end_src

Then, add ~custom/org~ to your ~modules-left~, ~modules-center~, or ~module-right~
section in your bar’s configuration.  You can find a minimal working
configuration in the [[./examples][examples]] directory.

** Additional Configuration

You can also display an icon specific to the clocked tasks category with the ~format-icons~ key:

#+begin_src json
"custom/org": {
    "format": "{icon} {}",
    "return-type": "json",
    "restart-interval": 1,
    "format-icons": {
      "refile": "",
      "ToDo": "",
    },
  "exec": "cat /home/yourusername/.cache/waybar-current-task.json"
}
#+end_src

If you use Emacs as a daemon (e.g. starting it as ~emacs --daemon~ or calling
~(server-start)~), you can change the ~exec~ command to invoke ~emacsclient~ directly.
Note that, since Emacsclient can’t actually write stuff to the terminal, it will
output an Emacs string full of backslashes (see [[https://emacs.stackexchange.com/a/28668/507][this Emacs SE answer for
details]]); thus, you have to pipe the output through ~jq fromjson~.

If you run emacs in this mode you can also eval commands on click, middle click or scroll.:

#+begin_src json
"custom/org": {
    "format": "{icon} {}",
    "return-type": "json",
    "restart-interval": 1,
    "format-icons": {
      "refile": "",
      "ToDo": "",
    },
    "exec": "emacsclient --eval '(org-clock-waybar-ouptut-task)' | jq fromjson --unbuffered --compact-output",
    "on-click": "emacsclient --eval '(org-clock-out)'",
    "on-middle-click": "emacsclient --eval '(org-clock-in-last)'",
},
#+end_src

If you want the taskbar to show nothing or some other content if the emacs server is not running then you need to write a short bash script to catch when the emacsclient command returns a non-zero exit code. An example of this is:

#+begin_src bash
#!/bin/bash

json=$(emacsclient --eval '(org-clock-waybar-ouptut-task)' 2> /dev/null)
status=$?
[ $status -eq 0 ] && echo $(echo $json | jq fromjson --unbuffered --compact-output) || echo ""
#+end_src

* Eww bar configuration

Waybar is still popular, but it also seems [[https://elkowar.github.io/eww/][Eww]] is also gaining popularity.

#+begin_src yuck
(defpoll current-org-task :interval "1s" :initial "{}" "cat /home/yourusername/.cache/waybar-current-task.json")

(defwidget current-org-task-widget []
  {current-org-task.text})

(defwidget bar []
  (box
   :orientation "h"
   (current-org-task-widget)))
#+end_src