#autoload

local list expl

_wanted windows || return 1

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

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

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

  _loop windows expl 'window ID' compadd "$@" -d list - "${(@)list%% *}"
fi