declare-option -docstring "name of the client in which documentation is to be displayed" \
    str docsclient

declare-option -hidden str manpage

hook -group man-highlight global WinSetOption filetype=man %{
    add-highlighter window/man-highlight group
    # Sections
    add-highlighter window/man-highlight/ regex ^\S.*?$ 0:title
    # Subsections
    add-highlighter window/man-highlight/ regex '^ {3}\S.*?$' 0:default+b
    # Command line options
    add-highlighter window/man-highlight/ regex '^ {7}-[^\s,]+(,\s+-[^\s,]+)*' 0:list
    # References to other manpages
    add-highlighter window/man-highlight/ regex [-a-zA-Z0-9_.]+\([a-z0-9]+\) 0:header

    hook -once -always window WinSetOption filetype=.* %{ remove-highlighter window/man-highlight }
}

hook global WinSetOption filetype=man %{
    hook -group man-hooks window WinResize .* %{ man-impl %val{bufname} %opt{manpage} }
    hook -once -always window WinSetOption filetype=.* %{ remove-hooks window man-hooks }
}

define-command -hidden -params 2..3 man-impl %{ evaluate-commands %sh{
    buffer_name="$1"
    shift
    manout=$(mktemp "${TMPDIR:-/tmp}"/kak-man-XXXXXX)
    colout=$(mktemp "${TMPDIR:-/tmp}"/kak-man-XXXXXX)
    MANWIDTH=${kak_window_width} man "$@" > $manout 2>/dev/null
    retval=$?
    col -b -x > ${colout} < ${manout}
    rm ${manout}
    if [ "${retval}" -eq 0 ]; then
        printf %s\\n "
                edit -scratch '$buffer_name'
                execute-keys '%|cat<space>${colout}<ret>gk'
                nop %sh{rm ${colout}}
                set-option buffer filetype man
                set-option window manpage '$@'
        "
    else
       printf %s\\n "echo -markup %{{Error}man '$@' failed: see *debug* buffer for details}"
       rm ${colout}
    fi
} }

define-command -params ..1 \
  -shell-script-candidates %{
      find /usr/share/man/ -name '*.[1-8]*' | sed 's,^.*/\(.*\)\.\([1-8][a-zA-Z]*\).*$,\1(\2),'
  } \
  -docstring %{man [<page>]: manpage viewer wrapper
If no argument is passed to the command, the selection will be used as page
The page can be a word, or a word directly followed by a section number between parenthesis, e.g. kak(1)} \
    man %{ evaluate-commands %sh{
    subject=${1-$kak_selection}

    ## The completion suggestions display the page number, strip them if present
    case "${subject}" in
        *\([1-8]*\))
            pagenum="${subject##*\(}"
            pagenum="${pagenum%\)}"
            subject="${subject%%\(*}"
            ;;
    esac

    printf %s\\n "evaluate-commands -try-client %opt{docsclient} man-impl *man* $pagenum $subject"
} }