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#!/bin/bash
# You can call this script like this:
# brightnessControl up
# brightnessControl down
# Script inspired by these wonderful people:
# https://github.com/dastorm/volume-notification-dunst/blob/master/volume.sh
# https://gist.github.com/sebastiencs/5d7227f388d93374cebdf72e783fbd6a
function send_notification {
icon=/usr/share/icons/Adwaita/symbolic/status/daytime-sunrise-symbolic.svg
brightness=$(brightnessctl g)
brightness=$((brightness *100 / 255 ))
brightness=$(echo "$brightness" | awk '{print ($0-int($0)<0.499)?int($0):int($0)+1}')
# Make the bar with the special character ─ (it's not dash -)
# https://en.wikipedia.org/wiki/Box-drawing_character
bar=$(seq -s "─" 0 $((brightness / 10 )) | sed 's/[0-9]//g')
# Send the notification
fyi -i "$icon" --hint=string:x-canonical-private-synchronous:brightness -u normal "$bar $brightness"
}
case $1 in
up)
# increase the backlight by 5%
brightnessctl s +5%
send_notification
# canberra-gtk-play -i audio-volume-change
;;
down)
# decrease the backlight by 5%
brightnessctl s 5%-
send_notification
# canberra-gtk-play -i audio-volume-change
;;
*)
brightness=$(brightnessctl g)
brightness=$((brightness *100 / 255 ))
brightness=$(echo "$brightness" | awk '{print ($0-int($0)<0.499)?int($0):int($0)+1}')
icon=""
printf "%s" "$icon $brightness" "%"
;;
esac
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