#autoload

setopt localoptions extendedglob

local list expl

list=( "${(@)${(M@)${(@f)$(xwininfo -root -tree)}:#[ 	]#0x[0-9a-f]# \"*}##[ 	]#}" )

if [[ "$1" = -n ]]; then
  shift

  _description expl 'window name'
  compadd "$@" "$expl[@]" -d list - "${(@)${(@)list#*\"}%%\"*}"
else
  [[ "$1" = - ]] && shift

  _description expl 'window ID'
  compadd "$@" "$expl[@]" -d list - "${(@)list%% *}"
fi