##---------------------------------------------------------------------------## ## $Id: mhtxtsetext.pl,v 2.3 2001/08/25 20:01:31 ehood Exp $ ## Library to convert text/setext to HTML. Adapted for use in MHonArc ## by ehood@medusa.acs.uci.edu, Sept 1994. ## Filter routine can be registered with the following: ## ## text/setext:m2h_text_setext'filter:mhtxtsetext.pl ## text/x-setext:m2h_text_setext'filter:mhtxtsetext.pl ## ##---------------------------------------------------------------------------## # setext -> HTML converter # # $Id: mhtxtsetext.pl,v 2.3 2001/08/25 20:01:31 ehood 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 m2h_text_setext; # parser states $FMT = 0; # in free flow text (normal HTML mode) $PRE = 1; # in preformated text <PRE>...</PRE> $QUOTE = 2; # in blockquote <BLOCKQUOTE>...</BLOCKQUOTE> sub filter { my($fields, $body) = @_; my(@data) = split(/\n/,$$body); $ret = ''; # first pass, process <HEAD> items and hypertext link information for ($i = 0; $i <= $#data; $i++) { $_ = $data[$i]; # $_ is default for m// # <ISINDEX> must be inside <HEAD>...</HEAD> /^\.\.\s+<isindex>/i && do { $data[$i] = ".."; 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; }; } # second pass, handle remaining typotags $curstate = $FMT; foreach (@data) { # process title information /^\.\.\s+()(.*)(<\/H.>)/i && do { &to_fmt; $ret .= $1. &htmlize($2). $3. "\n"; next; }; next if /^\.\./; # handle line breaks if ($curstate == $FMT && /^\s*$/) { $ret .= "

\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; $ret .= &htmlize($_). "\n"; } &to_fmt; ($ret); } sub to_fmt { return if $curstate == $FMT; $ret .= "\n" if $curstate == $PRE; $ret .= "\n" if $curstate == $QUOTE; #XXX $curstate = $FMT; } sub to_pre { return if $curstate == $PRE; $ret .= "

\n" if $curstate == $FMT;
    $ret .= "

\n" if $curstate == $QUOTE;  #XXX
    $curstate = $PRE;
}
sub to_quote {
    return if $curstate == $QUOTE;
    $ret .= "\n" if $curstate == $FMT;           #XXX
    $ret .= "
\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*//;
    # $ret .= "$data[$i]\n" unless $title++;
    $data[$i] = ".. <$head>" . $data[$i] . "";
}

1;