#!/usr/bin/perl # setext -> HTML converter # # $Id: setext.pl,v 2.7 1993/08/29 01:24:14 sanders Exp $ # # Tony Sanders , June 1993 # # Status of typotags: # header-tt passed untouched (XXX: use Subject: in next release) # title-tt

...

(and if needed) # subhead-tt <H2>...</H2> (and <TITLE> if needed) # indent-tt reflows paragraphs # # bold-tt <B>...</B> # italic-tt <I>...</I> # underline-tt <I>...</I> # hot-tt <A HREF="...">...</A> (see also href-tt) # # quote-tt <BLOCKQUOTE>...</BLOCKQUOTE> # NIY bullet-tt <UL>...</UL> # # twobuck-tt ignored # suppress-tt suppressed in output # twodot-tt ignored # # Additional typotags supported for HTML: # href-tt .. _text HREF # isindex-tt .. <isindex> # # setext'html -- converts setext (.etx files) to HTML # setext'title -- utility routine to convert setext titles and subheads to HTML # # TODO:XXX # I need to figure out how to allow HTML markup in the text while at the # same time suppresing "unintentional" markup. For now < & > are HTML'ized. # Define the translations supported # $trans{'text/setext'} = "text/html:setext'html"; package setext; # parser states $FMT = 0; # in free flow text (normal HTML mode) $PRE = 1; # in preformated text <PRE>...</PRE> $QUOTE = 2; # in blockquote <BLOCKQUOTE>...</BLOCKQUOTE> $main'plexus_configured || &setext'html; # run standalone sub html { local($title, $curstate, $fold, $a); local(@data) = <STDIN>; chop @data; # first pass, process <HEAD> items and hypertext link information print "<HEAD>\n"; for ($i = 0; $i <= $#data; $i++) { $_ = $data[$i]; # $_ is default for m// # <ISINDEX> must be inside <HEAD>...</HEAD> /^\.\.\s+<isindex>/i && do { $data[$i] = ".."; print "<ISINDEX>\n"; next; }; # locate HREF's: .. _href URL /^\.\.\s+_([^\s]*)\s+(.*)\s*/ && do { $href{$1} = $2; next; }; # first title-tt or subhead-tt gets <TITLE>... # &title also adds the ... to the appropriate line /^===/ && do { &title("H1", $i); next; }; /^---/ && do { &title("H2", $i); next; }; } print "\n"; # second pass, handle remaining typotags $curstate = $FMT; print "\n"; foreach (@data) { # process title information /^\.\.\s+()(.*)(<\/H.>)/i && do { &to_fmt; print $1, &htmlize($2), $3, "\n"; next; }; next if /^\.\./; # handle line breaks if ($curstate == $FMT && /^\s*$/) { print "

\n" unless $fold++; next; } $fold = 0; # state transitions if (/^>\s/) { &to_quote; } elsif (/^ [^ ]/) { &to_fmt; } else { &to_pre; } s/^>\s*//; # fix quote-tt s/^ ([^ ])/\1/; # fix indent-tt # bold-tt s#\*\*([^\*]*)\*\*#\376B\377$1\376/B\377#; # italic-tt s#~([^~]*)~#\376I\377$1\376/I\377#; # hot-tt s#\b([^\s]*)_\b# $h = $href{$1}; ($a = $1) =~ s,_, ,g; $h ? qq'\376A HREF="$h"\377$a\376/A\377' : "\376I\377$a\376/I\377"; #e; # underline-tt s#_([^\s]*)_# ($a = $1) =~ s,_, ,g; "\376I\377$a\376/I\377"; #e; print &htmlize($_), "\n"; } &to_fmt; print "\n"; } sub to_fmt { return if $curstate == $FMT; print "\n" if $curstate == $PRE; print "\n" if $curstate == $QUOTE; #XXX $curstate = $FMT; } sub to_pre { return if $curstate == $PRE; print "

\n" if $curstate == $FMT;
    print "

\n" if $curstate == $QUOTE;  #XXX
    $curstate = $PRE;
}
sub to_quote {
    return if $curstate == $QUOTE;
    print "\n" if $curstate == $FMT;           #XXX
    print "
\n" if $curstate == $PRE;     #XXX
    $curstate = $QUOTE;
}
sub htmlize {
    local($_) = @_;
    s/\&/\&\#38\;/g; s/\/\&\#62\;/g;
    s/\376//g;                                     # convert back
    $_;
}
sub title {
    local($head, $i) = @_;
    $data[$i--] = ".."; $data[$i] =~ s/^\s*//;
    print "$data[$i]\n" unless $title++;
    $data[$i] = ".. <$head>" . $data[$i] . "";
}

1;