#!/usr/bin/env bash

# STD_COPYRIGHT#
# $Id: wacom-rot90 16263 2009-01-21 16:44:17Z jeremy $
#
# lhm 7/12/09 current rotation changes
#

#LOCKFILE="/opt/emperor/var/run/wacom-rot90.lock"
LOCKFILE="/tmp/wacom-rot90.lock"

T_x="0"
T_y="0"
B_x="24576"
B_y="18432"

# film installation error deltas, dots at 2500dpi
D_x="0"
D_y="0"

function SetWacomOrientationNormal() {
	xsetwacom set stylus TopX    $(($T_x+$D_x))
	xsetwacom set stylus TopY    $(($T_y+$D_y))
	xsetwacom set stylus BottomX $(($B_x+$D_x))
	xsetwacom set stylus BottomY $(($B_y+$D_y))
}
function SetWacomOrientationRotInv() {
	xsetwacom set stylus TopX    $(($T_x-$D_x))
	xsetwacom set stylus TopY    $(($T_y-$D_y))
	xsetwacom set stylus BottomX $(($B_x-$D_x))
	xsetwacom set stylus BottomY $(($B_y-$D_y))
}

function SetWacomOrientationRotRight() {
	xsetwacom set stylus TopX    $(($T_y-$D_y))
	xsetwacom set stylus TopY    $(($T_x-$D_x))
	xsetwacom set stylus BottomX $(($B_y-$D_y))
	xsetwacom set stylus BottomY $(($B_x-$D_x))
}

function SetWacomOrientationRotLeft() {
	xsetwacom set stylus TopX    $(($T_y+$D_y))
	xsetwacom set stylus TopY    $(($T_x+$D_x))
	xsetwacom set stylus BottomX $(($B_y+$D_y))
	xsetwacom set stylus BottomY $(($B_x+$D_x))
}

function go_right() {
	xrandr -o right
	xsetwacom set stylus rotate CW
	SetWacomOrientationRotRight
}

function go_left() {
	xrandr -o left
	xsetwacom set stylus rotate CCW
	SetWacomOrientationRotLeft
}

function go_normal() {
	xrandr -o normal
	xsetwacom set stylus rotate NONE
	SetWacomOrientationNormal
}

function go_inverted() {
	xrandr -o inverted
	xsetwacom set stylus rotate HALF
	SetWacomOrientationRotInv
}

if [ -f "${LOCKFILE}" ]; then
	exit
fi

touch "${LOCKFILE}"

#CURRENT_ROTATION=$(xrandr | grep '^Current rotation - ' | sed 's/^Current rotation - //g')
CURRENT_ROTATION=$(xrandr | grep 'LVDS' | cut -d " " -f 4 | sed 's/^(normal/normal/g')

echo $CURRENT_ROTATION


if [ -n "${1}" ]; then
	case "${1}" in
	*normal )
		go_normal
	;;

	inverted)
		go_inverted
	;;

	right)
		go_right
	;;

	left)
		go_left
	;;

	toggle)
		if [ "${CURRENT_ROTATION}" = "inverted" ]; then
			go_normal

		else
			go_inverted
		fi
	;;

	*)
		echo "usage: wacom-rot90 {normal | inverted | right | left}"
	;;
	esac

else
	case "${CURRENT_ROTATION}" in
	*normal)
		go_right
	;;

	right)
		go_inverted
	;;

	inverted)
		go_left
	;;

	left)
		go_normal
	;;

	*)
		true
	;;
	esac
fi

rm -f "${LOCKFILE}"