#!/bin/bash
#
# compiz-rotate-wmctrl - Rotate the cube using wmctrl
#
# Author: Shang-Feng Yang
# Released under GPLv3

VER="1.0"


function rotate() {
  # The target face number (begins with 0)
  TVPN=$(( $1 % ${NF} ))

  # The X coordinate of the target viewport
  TVPX=$(( ${TVPN} * ${WW} ))

  # Change to the target viewport
  wmctrl -o ${TVPX},0
}

function usage() {
  echo -e "$(basename $0) v${VER}\n"
  echo -e "Usage:\n"
  echo -e "\t$(basename $0) {left|right|#}\n"
  echo -e "\tWhere:\n"
  echo -e "\t\tleft - rotate the cube to the left"
  echo -e "\t\tright - rotate the cube to the right"
  echo -e "\t\t# - rotate to #th face (begins with 0)\n\n"
  echo -e "Author: Shang-Feng Yang <storm dot sfyang at gmail dot com>"
  echo -e "Released under GPLv3"
}

# The action to be performed. $ACT could be 'left' or 'right' to rotate
# left or right, accordingly. $ACT could also be the number of the face
# to rotate into.
#ACT=$(echo $1 |tr '[A-Z]' '[a-z]')

ACT="left"

#[ "x$ACT" == "x" ] && { usage; exit 1; } || {
#  case $ACT in
#    left|right|[0-9]|[0-9][0-9])
#      ;;
#    *)
#      usage
#      exit 1
#      ;;
#  esac
#}


#rotate ${ACT}

while (true)
do
	# The informations about the desktop
	INFO=$(wmctrl -d)
	# The width of the desktop
	DW=$(echo "${INFO}"| awk '{sub(/x[0-9]+/, "", $4); print $4}')
	# The width of the workarea
	WW=$(echo "${INFO}"| awk '{sub(/x[0-9]+/, "", $9); print $9}')
	# The number of faces on the cube
	NF=$(($DW/$WW))
	# The X coordinate of the viewport
	CVPX=$(echo "${INFO}" |awk '{sub(/,[0-9]+/, "", $6); print $6}')
	# Current number of the face in all faces (begins with 0)
	CVPN=$(( ${CVPX} / ${WW} ))
	ACT=$(( ${CVPN} + 1))

	rotate ${ACT}
	sleep 2
	date
	date >> ~/rotate-forever.log
done