#!/bin/bash
#
# The script is designed to be launched by fjbtndrv backend and should be placed in ~/.fjbtndrv/scripts or <LIBDIR>/fjbtndrv
# It changes the evdev properties of touchscreen depending on ACTION and ORIENTATION using xinput.
#
# Author :  draco31.fr
# Contact : see http://doc.ubuntu-fr.org/utilisateurs/draco31.fr
# Licence : GNU GPLv3 (see http://www.gnu.org/copyleft/gpl.html )
#
script="$(basename $0)"
logfile="/var/log/${script}.log"
DEBUG=${DEBUG:=no}

do_log()
{
	if [ "$1" == yes ]
	then
	{
		echo "$2" | tee -a $logfile 1>&2
	}
	fi
}

find_touchscreen()
{
	IFS=$'\n'

	do_log "$DEBUG" "Searching device ..."
	local device_name
	for device in $(xinput list --name-only)
	do
		do_log "$DEBUG" "... Testing device $device"
		output="$(xinput list-props "$device" 2>/dev/null | grep 'Evdev Axis Calibration' --label="$device" -H)"
		if [ $? -eq 0 ]
		then
			do_log "$DEBUG" "Device found : $output"
			device_name="$device"
			break
		fi
	done

	do_log "yes" "Touchscreen device : $device_name"
	if [ -n "$device_name" ]
	then
	{
		echo $device_name
		return 0
	}
	else
		return 1
	fi
}

do_log "$DEBUG" "$(date) > ${script} : ACTION='$ACTION' ORIENTATION='$ORIENTATION' TOUCHSCREEN='$TOUCHSCREEN_DEVICE'"

if [ "$ACTION" == "rotated" ]
then
{
	if [ -z "$TOUCHSCREEN_DEVICE" ]
	then
		declare -x TOUCHSCREEN_DEVICE="$(find_touchscreen)"
		export TOUCHSCREEN_DEVICE
	fi

	declare -i AxisX=0
	declare -i AxisY=0
	declare -i SwapAxes=0

	case "$ORIENTATION" in
	    "normal")
		# Keep initial values
		;;
	    "inverted")
		# Invert Axis
		AxisX=1
		AxisY=1
		# Keep X/Y orientation
		;;
	    "left")
		# inverse AxisX
		AxisX=1
		# Rotate Axes
		SwapAxes=1
		;;
	    "right")
		# inverse axes
		#AxisX=0
		AxisY=1
		# Rotate Axes
		SwapAxes=1
		;;
	    *)
		do_log "yes" "Unknown ORIENTATION='$ORIENTATION'"
		exit 1
		;;
	esac
	do_log "yes" "Changing properties of device '$TOUCHSCREEN_DEVICE' : AxisX=$AxisX AxisY=$AxisY SwapAxes=$SwapAxes"
	xinput set-prop "$TOUCHSCREEN_DEVICE" 262 $AxisX $AxisY
	xinput set-prop "$TOUCHSCREEN_DEVICE" 264 $SwapAxes
}
fi
exit 0