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|
#!/bin/sh
BLOCK=
BUFFER=
process() {
while read -r LINE
do
if test "$BLOCK" = verbatim
then
printf '%s\n' "$LINE"
continue
fi
set -- $LINE
case "$LINE" in
('```')
if test "$BLOCK" = verbatim
then BLOCK=
else BLOCK=verbatim
fi
;;
('')
if test "$BLOCK" = verbatim
then bufpush $'\n'
else bufclose
fi
;;
('=>'*) link "$@" ;;
('#'*) header "$@" ;;
('*'*) shift; blknew list "$*" ;;
('>'*) shift; blknew quote "$*" ;;
(*) shift; blknew paragraph "$*" ;;
esac
done
bufclose
}
blknew() {
test "$BLOCK" = "$1" || bufclose
bufpush "$(printf "$(eval echo "\$format_$BLOCK")" "$@")"
BLOCK="$1"
}
bufclose() {
if test -z "$BLOCK"
then "$COLLAPSE_BLANKS" && return
else newline; return
fi
# blockp "$BLOCK" || return
# fillp $BLOCK && buffill "$(fillp $BLOCK)"
# TODO: escape shit
printf '%s%s%s\n' \
"$(echo eval "\$opener_$BLOCK")" \
"$BUFFER" \
"$(echo eval "\$closer_$BLOCK")"
BLOCK=
}
buffill() { # buffill WIDTH
if test $1 -lt 0
then BUFFER="$(printf '%s\n' "$BUFFER" | tr '\n' ' ')"
else
out=
nline=0
printf '%s\n' "$BUFFER" | sed 's/[ \t]\+/\n/g' |
while read -r word
do
if test $((nline + ${#word})) -ge "$1"
then
out="${out}"${out:+$'\n'}"${word}"
nline=${#word}
else
out="${out}${out:+ }${word}"
nline=$((nline + ${#word} + 1))
fi
done
BUFFER="$out"
fi
}
bufpush() { BUFFER="${BUFFER}$@"; }
fillp() {
:
}
header() {
bufclose
lvl=${#1}; shift
bufpush "$(printf "$(eval echo "\$format_h$lvl")" "$*")"
BLOCK=header
}
link() {
url="$2"; shift 2
if test "$BLOCK" = paragraph #&& ! blockp link
then bufpush "$(printf "$format_link" "$url" "$*")"
else blknew linklist "$url" "$*"
fi
}
newline() { printf '\n'; }
html() {
format_link='<a href="%s">%s</a>\n'
format_h1='<h1>%s</h1>\n'
format_h2='<h2>%s</h2>\n'
format_h3='<h3>%s</h3>\n'
opener_verbatim='<pre><code>'
closer_verbatim='</code></pre>\n'
format_verbatim='%s\n'
opener_paragraph='<p>'
closer_paragraph='</p>\n'
format_paragraph='%s\n'
opener_quote='<blockquote>'
closer_quote='</blockquote>\n'
format_quote='%s\n'
opener_list='<ul>\n'
closer_list='</ul>\n'
format_list='<li>%s</li>'
opener_linklist='<ul class="linklist">'
closer_linklist='</ul>'
format_linklist="$(printf "$format_list" "$format_link")"
}
main() {
html
process "$@"
}
main "$@"
|
