# man(1) completion

[[ $USERLAND == GNU || $UNAME == @(Darwin|FreeBSD|SunOS|Cygwin|OpenBSD) ]] &&
_man()
{
    local cur prev words cword split
    _init_completion -s -n : || return

    local i sect manpath manext mansect uname

    manext="@([0-9lnp]|[0-9][px]|man|3pm)?(.@([gx]z|bz2|lzma|Z))"
    mansect="@([0-9lnp]|[0-9][px]|3pm)"

    case $prev in
        -C|--config-file)
            _filedir conf
            return
            ;;
        -l|--local-file)
            _filedir $manext
            return
            ;;
        -M|--manpath)
            _filedir -d
            return
            ;;
        -P|--pager)
            COMPREPLY=( $( compgen -c -- "$cur" ) )
            return
            ;;
        -p|--preprocessor)
            COMPREPLY=( $( compgen -W 'e p t g r v' -- "$cur" ) )
            return
            ;;
        -L|--locale|-m|--systems|-e|--extension|-r|--prompt|-R|--recode|\
        -E|--encoding)
            return
            ;;
    esac

    $split && return

    if [[ $cur == -* ]]; then
        COMPREPLY=( $( compgen -W '$( _parse_help "$1" -h )' -- "$cur" ) )
        [[ $COMPREPLY == *= ]] && compopt -o nospace
        return
    fi

    _expand || return 0

    # file based completion if parameter looks like a path
    if [[ "$cur" == @(*/|[.~])* ]]; then
        _filedir $manext
        return 0
    fi

    uname=$( uname -s )
    if [[ $uname == @(Linux|GNU|GNU/*|FreeBSD|Cygwin|CYGWIN_*) ]]; then
        manpath=$( manpath 2>/dev/null || command man --path )
    else
        manpath=$MANPATH
    fi

    if [ -z "$manpath" ]; then
        COMPREPLY=( $( compgen -c -- "$cur" ) )
        return 0
    fi

    # determine manual section to search
    [[ "$prev" == $mansect ]] && sect=$prev || sect='*'

    manpath=$manpath:
    if [ -n "$cur" ]; then
        manpath="${manpath//://*man$sect/$cur* } ${manpath//://*cat$sect/$cur* }"
    else
        manpath="${manpath//://*man$sect/ } ${manpath//://*cat$sect/ }"
    fi

    # redirect stderr for when path doesn't exist
    COMPREPLY=( $( eval command ls "$manpath" 2>/dev/null ) )
    # weed out directory path names and paths to man pages
    COMPREPLY=( ${COMPREPLY[@]##*/?(:)} )
    # strip suffix from man pages
    COMPREPLY=( ${COMPREPLY[@]%.@([gx]z|bz2|lzma|Z)} )
    COMPREPLY=( $( compgen -W '${COMPREPLY[@]%.*}' -- "${cur//\\\\/}" ) )

    if [[ "$prev" != $mansect ]]; then
        # File based completion for the rest, prepending ./ if needed
        # (man 1.6f needs that for man pages in current dir)
        local start=${#COMPREPLY[@]}
        _filedir $manext
        for (( i=$start; i < ${#COMPREPLY[@]}; i++ )); do
            [[ ${COMPREPLY[i]} == */* ]] || COMPREPLY[i]=./${COMPREPLY[i]}
        done
    fi

    __ltrim_colon_completions "$cur"
    return 0
} &&
complete -F _man man apropos whatis

# Local variables:
# mode: shell-script
# sh-basic-offset: 4
# sh-indent-comment: t
# indent-tabs-mode: nil
# End:
# ex: ts=4 sw=4 et filetype=sh