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+;;; screen-brightness.el --- Control laptop screen brightness -*- lexical-binding: t -*-
+
+;; Author: William Carroll <wpcarro@gmail.com>
+;; Version: 0.0.1
+;; Package-Requires: ((emacs "24"))
+
+;;; Commentary:
+;; Control your laptop's screen brightness.
+
+;;; Code:
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Dependencies
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+(require 'prelude)
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Constants
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+(defgroup screen-brightness nil "Configuration for screen-brightness.")
+
+(defcustom screen-brightness-increase-cmd
+  "light -A 3"
+  "The shell command to run to increase screen brightness."
+  :group 'screen-brightness
+  :type 'string)
+
+(defcustom screen-brightness-decrease-cmd
+  "light -U 3"
+  "The shell command to run to decrease screen brightness."
+  :group 'screen-brightness
+  :type 'string)
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Library
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+(defun screen-brightness-increase ()
+  "Increase the screen brightness."
+  (interactive)
+  (prelude-start-process
+   :name "screen-brightness-increase"
+   :command screen-brightness-increase-cmd)
+  (message "[screen-brightness.el] Increased screen brightness."))
+
+(defun screen-brightness-decrease ()
+  "Decrease the screen brightness."
+  (interactive)
+  (prelude-start-process
+   :name "screen-brightness-decrease"
+   :command screen-brightness-decrease-cmd)
+  (message "[screen-brightness.el] Decreased screen brightness."))
+
+(provide 'screen-brightness)
+;;; screen-brightness.el ends here