screen-toggle

#!/bin/sh

usage(){
	fmt <<EOF
DESCRIPTION
	Toggle the display on or off.

USAGE
	screen-toggle
EOF
	exit
}
die(){ printf "Error: %s\n" "${1}" 1>&2; exit 1; }
require(){ command -v "${1}" > /dev/null 2>&1 || { suggestion=""; if [ ! -z "$2" ]; then suggestion=" $2"; fi; die "$1 is not installed.${suggestion}"; } }
if [ $# -eq 1 ]; then if [ "$1" = "--help" ] || [ "$1" = "-h" ]; then usage; fi fi
# End boilerplate

sessionType=$(loginctl show-session "$(loginctl |grep "$(whoami)" |awk '{print $1}')" -p Type | sed "s/Type=//")

if [ "${sessionType}" = "wayland" ]; then
	screenState=$(busctl --user get-property org.gnome.Mutter.DisplayConfig /org/gnome/Mutter/DisplayConfig org.gnome.Mutter.DisplayConfig PowerSaveMode)

	if [ "${screenState}" = "i 0" ]; then
		# Turn screen off
		busctl --user set-property org.gnome.Mutter.DisplayConfig /org/gnome/Mutter/DisplayConfig org.gnome.Mutter.DisplayConfig PowerSaveMode i 1
		echo 1 | sudo tee /sys/class/leds/tpacpi::power/brightness > /dev/null
	else
		# Turn screen on
		busctl --user set-property org.gnome.Mutter.DisplayConfig /org/gnome/Mutter/DisplayConfig org.gnome.Mutter.DisplayConfig PowerSaveMode i 0
		echo 0 | sudo tee /sys/class/leds/tpacpi::power/brightness > /dev/null
	fi
else
	screenOffLockFile="/tmp/screen-toggle-lock"

	if [ ! -f "${screenOffLockFile}" ]; then
		# Turn the screen off. Because keyboard/mouse input will turn the screen on again,
		# do this in a loop that sets the screen off every .5 seconds.
		touch "${screenOffLockFile}"
		echo 1 | sudo tee /sys/class/leds/tpacpi::power/brightness > /dev/null
		while :
		do
			if ! xset q | grep --quiet "Monitor is Off"; then
				if [ -f ${screenOffLockFile} ]; then
					xset dpms force off
				else
					xset dpms force on
					exit
				fi
			fi
			sleep .5
		done
	else
		echo 0 | sudo tee /sys/class/leds/tpacpi::power/brightness > /dev/null
		rm "${screenOffLockFile}"
		xset dpms force on
	fi
fi