modules/setext.pl

   1 # Copyright (C) 2004  Alex Schroeder <alex@emacswiki.org>
   2 #
   3 # This program is free software; you can redistribute it and/or modify
   4 # it under the terms of the GNU General Public License as published by
   5 # the Free Software Foundation; either version 2 of the License, or
   6 # (at your option) any later version.
   7 #
   8 # This program is distributed in the hope that it will be useful,
   9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 # GNU General Public License for more details.
  12 #
  13 # You should have received a copy of the GNU General Public License
  14 # along with this program; if not, write to the
  15 #    Free Software Foundation, Inc.
  16 #    59 Temple Place, Suite 330
  17 #    Boston, MA 02111-1307 USA
  18
  19 $ModulesDescription .= '<p><a href="http://git.savannah.gnu.org/cgit/oddmuse.git/tree/modules/setext.pl">setext.pl</a>, see <a href="http://www.oddmuse.org/cgi-bin/oddmuse/SeText_Extension">SeText Extension</a></p>';
  20
  21 push(@MyRules, \&SeTextRule);
  22
  23 # The trickiest part is the first rule.  It finds titles like the following:
  24 #
  25 # foo
  26 # ===
  27 #
  28 # It ignores the amount of whitespace after the title and the
  29 # underlining, and it allows underlining using ==== or ----.  The
  30 # underlining has to be exactly as wide as the title itself.  If it is
  31 # too long or too short, the entire thing is not a title.
  32 #
  33 # If the length does not match, pos is reset and zero is returned so
  34 # that the remaining rules will be tested instead.
  35
  36 my $word = '([-A-Za-z\x{0080}-\x{fffd}]+)';
  37 sub SeTextRule {
  38   my $oldpos = pos;
  39   if ($bol && ((m/\G((.+?)[ \t]*\n(-+|=+)[ \t]*\n)/gc
  40                 and (length($2) == length($3)))
  41                or ((pos = $oldpos) and 0))) {
  42     my $html = CloseHtmlEnvironments() . ($PortraitSupportColorDiv ? '</div>' : '');
  43     if (substr($3,0,1) eq '=') {
  44       $html .= $q->h2($2);
  45     } else {
  46       $html .= $q->h3($2);
  47     }
  48     $PortraitSupportColorDiv = 0;
  49     return $html . AddHtmlEnvironment('p');
  50   } elsif ($bol && m/\G((&gt; .*\n)+)/gc) {
  51     my $text = $1;
  52     return CloseHtmlEnvironments() . $q->pre($text) . AddHtmlEnvironment('p');
  53   } elsif (m/\G\*\*($word( $word)*)\*\*/goc) {
  54     return "<b>$1</b>";
  55   } elsif (m/\G~$word~/goc) {
  56     return "<i>$1</i>";
  57   } elsif (m/\G\b_($word(_$word)*)_\b/goc) {
  58     return '<em style="text-decoration: underline; font-style: normal;">'
  59       . join(' ', split(/_/, $1)) . "</em>"; # don't clobber pos
  60   } elsif (m/\G`_(.+)_`/gc) {
  61     return $1;
  62   }
  63   return undef;
  64 }