Introduce own util for backlight control

1 files changed, 72 insertions, 0 deletions

diff --git a/.local/bin/bl b/.local/bin/bl
new file mode 100755
index 0000000..644fe2a
--- /dev/null
+++ b/.local/bin/bl
@@ -0,0 +1,72 @@
+#!/bin/sh
+
+# This program is free software: you can redistribute it and/or modify it under
+# the terms of the GNU Affero General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or (at your option) any
+# later version.
+#
+# This program 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 Affero General Public License for more
+# details.
+
+main()
+{
+	# Handle opts
+	while getopts ":h" opt
+	do
+		case "$opt" in
+			h) usage && exit 0 ;;
+			*)
+				printf "Invalid option passed: %s\n" "$OPTARG" >&2
+				;;
+		esac
+	done
+
+	shift $(( OPTIND - 1 ))
+
+	[ $# -lt 1 ] && usage && exit 1
+
+	case "$1" in
+		inc)
+			xbacklight -inc ${2:-5}
+			notify="Brightness increased to $(brightness_level)%"
+			;;
+		dec)
+			xbacklight -dec ${2:-5}
+			notify="Brightness lowered to $(brightness_level)%"
+			;;
+	esac
+
+	notify-send -n 57492 -s -t 4 -i "$(brightness_icon)" "Backlight" "$notify"
+}
+
+brightness_level()
+{
+	xbacklight -get
+}
+
+brightness_icon()
+{
+	[ $(brightness_level) -lt 10 ] && printf "notification-display-brightness-off" && return
+	[ $(brightness_level) -lt 35 ] && printf "notification-display-brightness-low" && return
+	[ $(brightness_level) -lt 70 ] && printf "notification-display-brightness-medium" && return
+	[ $(brightness_level) -lt 95 ] && printf "notification-display-brightness-high" && return
+
+	printf "notification-display-brightness-full"
+}
+
+usage()
+{
+	cat <<EOF
+Usage:
+	${0##*/} -h
+
+Nondescript
+
+Options:
+	-h  Show this help text and exit.
+EOF
+}
+
+main "$@"