#!/bin/sh
# 2022-02-22, Nico Schottelius
# Inspired by https://gist.github.com/Links2004/5976ce97a14dabf773c3ff98d03c0f61

output=$(xrandr | awk '/connected primary/ { print $1 }')
#input=$(xinput --list | grep -e "Pen" | sed 's/.*id=\([0-9]*\).*/\1/')
input_1="Wacom HID 5276 Finger"
input_2="Wacom HID 5276 Pen Pen (0x81266661)"

monitor-sensor | (
    while true; do
        read line
        ORIENTATION=$(echo $line | awk -F: '/Accelerometer orientation changed:/ { print $2 } ' | sed 's/ *//')

        # Check if we are matching on a correct line, if not, skip
        if [ -z "$ORIENTATION" ]; then
            continue
        fi

        echo $ORIENTATION

	    case "$ORIENTATION" in
	        normal)
		        rotate="normal"
		        matrix="1 0 0 0 1 0 0 0 1"
		        ;;
	        bottom-up)
		        rotate="inverted"
		        matrix="-1 0 1 0 -1 1 0 0 1"
		        ;;
	        right-up)
		        rotate="right"
		        matrix="0 1 0 -1 0 1 0 0 1"
		        ;;
	        left-up)
		        rotate="left"
		        matrix="0 -1 1 1 0 0 0 0 1"
		        ;;
	    esac

#        set -x
        xrandr --output ${output} --rotate ${rotate}
        xinput set-prop "${input_1}" 'Coordinate Transformation Matrix' ${matrix}
        xinput set-prop "${input_2}" 'Coordinate Transformation Matrix' ${matrix}
#        set +x
    done
)