#autoload

# ### Note: Calling this function twice during one completion operation, such
# ### that in each call there exists a pair of items having the same description
# ### as each other, and the two calls specify the same $_type, currently leads
# ### to garbled output; see workers/35229 (May 2015) and its thread (which also
# ### discusses at least two other issues, that may or may not be related to
# ### this one).

# This can be used to add options or values with descriptions as matches.

local _opt _expl _tmpm _tmpd _mlen _noprefix
local _type=values _descr _ret=1 _showd _nm _hide _args _grp _sep
local csl="$compstate[list]" csl2
local _oargv _argv _new _strs _mats _opts _i _try=0
local OPTIND OPTARG
local -a _jvx12

# Get the option.

while getopts "oOt:12JVx" _opt; do
  case $_opt in
    (o)
      _type=options;;
    (O)
      _type=options
      _noprefix=1
      ;;
    (t)
      _type="$OPTARG"
      ;;
    (1|2|J|V|x)
      _jvx12+=(-$_opt)
  esac
done
shift $(( OPTIND - 1 ))
unset _opt

[[ "$_type$_noprefix" = options && ! -prefix [-+]* ]] && \
    zstyle -T ":completion:${curcontext}:options" prefix-needed &&
        return 1

# Do the tests. `showd' is set if the descriptions should be shown.

zstyle -T ":completion:${curcontext}:$_type" verbose && _showd=yes

zstyle -s ":completion:${curcontext}:$_type" list-separator _sep || _sep=--
zstyle -s ":completion:${curcontext}:$_type" max-matches-width _mlen ||
    _mlen=$((COLUMNS/2))

_descr="$1"
shift

if [[ -n "$_showd" ]] &&
   zstyle -T ":completion:${curcontext}:$_type" list-grouped; then
  _oargv=( "$@" )
  _grp=(-g)
else
  _grp=()
fi

[[ "$_type" = options ]] &&
    zstyle -t ":completion:${curcontext}:options" prefix-hidden &&
        _hide="${(M)PREFIX##(--|[-+])}"

_tags "$_type"
while _tags; do
  while _next_label $_jvx12 "$_type" _expl "$_descr"; do

    if (( $#_grp )); then
  
      set -- "$_oargv[@]"
      _argv=( "$_oargv[@]" )
      _i=1
      (( _try++ ))
      while (( $# )); do
    
        _strs="_a_$_try$_i"
        if [[ "$1" = \(*\) ]]; then
          eval local "_a_$_try$_i;_a_$_try$_i"'='$1
        else
          eval local "_a_$_try$_i;_a_$_try$_i"'=( "${'$1'[@]}" )'
        fi
        _argv[_i]="_a_$_try$_i"
        shift
        (( _i++ ))
    
        if [[ "$1" = (|-*) ]]; then
          _mats=
        else
          _mats="_a_$_try$_i"
          if [[ "$1" = \(*\) ]]; then
            eval local "_a_$_try$_i;_a_$_try$_i"'='$1
          else
            eval local "_a_$_try$_i;_a_$_try$_i"'=( "${'$1'[@]}" )'
          fi
          _argv[_i]="_a_$_try$_i"
          shift
          (( _i++ ))
        fi
    
        _opts=( "${(@)argv[1,(i)--]:#--}" )
        shift "$#_opts"
        (( _i += $#_opts ))
        if [[ $1 == -- ]]; then
          shift
          (( _i++ ))
        fi
    
        if [[ -n $_mats ]]; then
          compadd "$_opts[@]" "${(@)_expl:/-J/-2V}" -D $_strs -O $_mats - \
                  "${(@)${(@M)${(@P)_mats}##([^:\\]|\\?)##}//\\(#b)(?)/$match[1]}"
        else
          compadd "$_opts[@]" "${(@)_expl:/-J/-2V}" -D $_strs - \
                  "${(@)${(@M)${(@P)_strs}##([^:\\]|\\?)##}//\\(#b)(?)/$match[1]}"
        fi
      done
      set - "$_argv[@]"
    fi

    if [[ -n "$_showd" ]]; then
      compdescribe -I "$_hide" "$_mlen" "$_sep " _expl "$_grp[@]" "$@"
    else
      compdescribe -i "$_hide" "$_mlen" "$@"
    fi

    compstate[list]="$csl"

    while compdescribe -g csl2 _args _tmpm _tmpd; do

      compstate[list]="$csl $csl2"
      [[ -n "$csl2" ]] && compstate[list]="${compstate[list]:s/rows//}"

      compadd "$_args[@]" -d _tmpd -a _tmpm && _ret=0
    done
  done
  (( _ret )) || return 0
done

return 1
