#!/bin/bash
while true ; do
   getopts 'a:d:' x 
   case "$x" in
      a)
	 app="$OPTARG"
	 ;;
      d)
	 win="$OPTARG"
	 ;;
      ?)
	 break
	 ;;
   esac
done
shift $(( $OPTIND - 1 ))
prog="$1"
shift

if [ x"$app" = x -o x"$win" = x -o x"$prog" = x ] ; then
   echo "Start program on virtual window"
   echo "usage:"
   echo "$0 -d desktop -a appname command"
   echo "example:"
   echo "$0 -d 3 -a calc xcalc -stipple -rpn"
   exit 1
fi

f() {
   # returns 0 if app is running in win
   wmctrl -l -x | awk -v app="$2" -v win="$1"  '
   BEGIN { a=1 }
   {
      class = $3
      if ($2 == win && match(class, app) != 0)
	 a = 0
   }
      END {exit a}
      '
}
if f $win "$app" ; then
   echo "$app already running in $win"
   exit 0
fi
w=20
cw=$(wmctrl -d | grep '  \* DG' | awk '{ print $1 }')
wmctrl -s "$win"
xmessage "starting $prog ..." -center -timeout "$w" &
pz="$!"
nohup $prog "$@" >/dev/null &
while ! f "$win" "$app" ; do
   echo "waiting $w '$win' '$app'"
   sleep 1
   (( w = w-1 ))
   if [ "$w" -eq 0 ] ; then
      echo "$prog does not start, exiting"
      exit 1
   fi
done
kill "$pz"
wmctrl -s "$cw"