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jamessouth edited this page Jul 12, 2023 · 14 revisions
a

fter downloading the script, update the displays and profiles arrays. To get your displays, run xrandr --listmonitors | awk '{print $4}' ORS=' '. Each profile is a set of red:green:blue gamma output corrections.

#!/usr/bin/env bash

displays=(eDP-1)
profiles=(
	1:1:1
	1:.97:.94
	1:.93:.88
	1:.90:.81
	1:.86:.73
	1:.82:.64
	1:.77:.54
	1:.71:.42
	1:.68:.35
	1:.64:.28
	1:.59:.18
	1:.54:.08
	1:.32:.03
	1:.18:.01
)

config="${XDG_DATA_HOME:-$HOME/.local/share}/$(basename "$0" .sh)"

source "$config"

len=${#profiles[@]}

case "$1" in
	"+" )    new_ind=$((ind+1 > len-1 ? len-1 : ind+1));;
	"-" )    new_ind=$((ind-1 < 0 ? 0 : ind-1));;
esac

new_prof="${profiles[$new_ind]}"

for display in "${displays[@]}"; do
	xrandr --output "$display" --gamma "${new_prof}"
done

echo "ind=${new_ind}" > "$config"
echo "${new_prof}"

 

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i

n your bar, place the nightlight module somewhere with the modules-left/center/right option. Make sure to activate ipc with enable-ipc = true. In your config, under the [module/nightlight] section, either include the following as a separate file with something like include-file = ~/.config/polybar/nightlight or insert it directly:

type = custom/ipc

#your formatting
format-prefix = "nl "
format-font = 1
format-prefix-foreground = ${colors.black}
format-foreground = ${colors.white}

initial = 1

hook-0 = bash ~/.config/polybar/nightlight.sh -
hook-1 = bash ~/.config/polybar/nightlight.sh +

scroll-up = "#nightlight.hook.0"
scroll-down = "#nightlight.hook.1"
#also available: click-left/middle/right, double-click-left/right

 

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i

f you have set the $XDG_DATA_HOME environment variable, the script will maintain state there in a file called nightlight. If not, ~/.local/share/nightlight is used as a fallback per the XDG specification. To initialize the state file simply restart your window manager or desktop environment to restart polybar. This will silently error the first time since the file is sourced before it exists but after that ind will be available and it will be ok. Click or scroll to move among your various r:g:b profiles in nightlight.sh. To reset the index on startup put echo "ind=0" > "${XDG_DATA_HOME:-$HOME/.local/share}/nightlight" in your startup file prior to the command that starts polybar.

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