forked from github/kensanata.oddmuse
115 lines
3.6 KiB
Perl
115 lines
3.6 KiB
Perl
# Copyright (C) 2004 Alex Schroeder <alex@emacswiki.org>
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# Copyright (C) 2006 Igor Afanasyev <afan@mail.ru>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the
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# Free Software Foundation, Inc.
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# 59 Temple Place, Suite 330
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# Boston, MA 02111-1307 USA
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#
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# This is a simplified mix of headers.pl and toc.pl to work together.
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# It is based on headers.pl 1.12 and toc.pl 1.30.
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use strict;
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AddModuleDescription('toc-headers.pl');
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our ($q, $bol, %Page, @MyRules);
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our ($MinTocSize, $OrderedLists);
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push(@MyRules, \&HeadersRule);
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my $MinTocSize = 4; # show toc only if the number of headings is greater or equal to this value
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my $OrderedLists = 0; # 1 if use <ol> instead of <ul>
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my $TocCounter = 0; # private
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my $TocShown = 0; # private
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sub HeadersRule {
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my $html = undef;
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if (!$TocShown) {
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$html = CloseHtmlEnvironments() . TocHeadings() . AddHtmlEnvironment('p');
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$TocShown = 1;
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}
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if ($bol && (m/\G((.+?)[ \t]*\n(---+|===+)[ \t]*\n)/gc)) {
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$html .= CloseHtmlEnvironments();
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$TocCounter++;
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$html .= "<a name=\"#$TocCounter\"></a>";
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if (substr($3,0,1) eq '=') {
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$html .= $q->h2($2);
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} else {
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$html .= $q->h3($2);
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}
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$html .= AddHtmlEnvironment('p');
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}
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return $html;
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}
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sub TocHeadings {
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my $oldpos = pos; # make this sub not destroy the value of pos
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my $page = $Page{text}; # work on the page that is currently open!
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# ignore all the stuff that gets processed anyway
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foreach my $tag ('nowiki', 'pre', 'code') {
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$page =~ s|<$tag>(.*\n)*?</$tag>||gi;
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}
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my $Headings = "<h2>" . T('Contents') . "</h2>";
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my $HeadingsLevel = undef;
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my $HeadingsLevelStart = undef;
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my $count = 1;
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my $tag = $OrderedLists ? 'ol' : 'ul';
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while ($page =~ m/((.+?)[ \t]*\n(---+|===+)[ \t]*\n)/g) {
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my $depth = (substr($3,0,1) eq '=') ? 2 : 3;
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my $text = $2;
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next unless $text;
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my $link = "$count"; #1, #2, etc. links seem to work fine
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$text = QuoteHtml($text);
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if (not defined $HeadingsLevelStart) {
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# $HeadingsLevel is set to $depth - 1 so that we get an opening
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# of the list. We need $HeadingsLevelStart to close all open
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# tags at the end.
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$HeadingsLevel = $depth - 1;
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$HeadingsLevelStart = $depth - 1;
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}
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$count++;
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# if the first subheading is has depth 2, then
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# $HeadingsLevelStart is 1, and later subheadings may not be
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# at level 1 or below.
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$depth = $HeadingsLevelStart + 1 if $depth <= $HeadingsLevelStart;
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# the order of the three expressions is important!
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while ($HeadingsLevel > $depth) {
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$Headings .= "</li></$tag>";
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$HeadingsLevel--;
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}
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if ($HeadingsLevel == $depth) {
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$Headings .= '</li><li>';
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}
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while ($HeadingsLevel < $depth) {
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$Headings .= "<$tag class=\"h$depth\"><li>";
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$HeadingsLevel++;
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}
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$Headings .= "<a href=\"#$link\">$text</a>";
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}
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while ($HeadingsLevel > $HeadingsLevelStart) {
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$Headings .= "</li></$tag>";
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$HeadingsLevel--;
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}
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pos = $oldpos;
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return '' if $count <= $MinTocSize;
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return $q->div({-class=>'toc'}, $Headings)
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if $Headings;
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}
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