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;;; screen-brightness.el --- Control laptop screen brightness -*- lexical-binding: t -*-
;; Author: William Carroll <wpcarro@gmail.com>
;;; Commentary:
;; Mainly just Elisp wrappers around `xbacklight`.
;;; Code:
;; TODO: Define some isomorphisms. E.g. int->string, string->int.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Constants
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defconst screen-brightness/step-size 15
"The size of the increment or decrement step for the screen's brightness.")
(defcustom screen-brightness/install-kbds? t
"If t, install the keybindings to control screen brightness.")
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Library
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defun screen-brightness/increase ()
"Increase the screen brightness."
(interactive)
(start-process
"*xbacklight<screen-brightness/increase>*"
nil
"xbacklight"
"-inc"
(int-to-string screen-brightness/step-size))
(message "[screen-brightness.el] Increased screen brightness."))
(defun screen-brightness/decrease ()
"Decrease the screen brightness."
(interactive)
(start-process
"*xbacklight<screen-brightness/decrease>*"
nil
"xbacklight"
"-dec"
(int-to-string screen-brightness/step-size))
(message "[screen-brightness.el] Decreased screen brightness."))
(when screen-brightness/install-kbds?
(exwm-input-set-key
(kbd "<XF86MonBrightnessUp>") #'screen-brightness/increase)
(exwm-input-set-key
(kbd "<XF86MonBrightnessDown>") #'screen-brightness/decrease))
(provide 'screen-brightness)
;;; screen-brightness.el ends here
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