/usr/share/perl5/IkiWiki/Plugin/toc.pm is in ikiwiki 3.20120202ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 | #!/usr/bin/perl
# Table Of Contents generator
package IkiWiki::Plugin::toc;
use warnings;
use strict;
use IkiWiki 3.00;
use HTML::Parser;
sub import {
hook(type => "getsetup", id => "toc", call => \&getsetup);
hook(type => "preprocess", id => "toc", call => \&preprocess);
hook(type => "format", id => "toc", call => \&format);
}
sub getsetup () {
return
plugin => {
safe => 1,
rebuild => undef,
section => "widget",
},
}
my %tocpages;
sub preprocess (@) {
my %params=@_;
if ($params{page} eq $params{destpage}) {
$params{levels}=1 unless exists $params{levels};
# It's too early to generate the toc here, so just record the
# info.
$tocpages{$params{destpage}}=\%params;
return "\n<div class=\"toc\"></div>\n";
}
else {
# Don't generate toc in an inlined page, doesn't work
# right.
return "";
}
}
sub format (@) {
my %params=@_;
my $content=$params{content};
return $content unless exists $tocpages{$params{page}};
%params=%{$tocpages{$params{page}}};
my $p=HTML::Parser->new(api_version => 3);
my $page="";
my $index="";
my %anchors;
my $startlevel=($params{startlevel} ? $params{startlevel} : 0);
my $curlevel=$startlevel-1;
my $liststarted=0;
my $indent=sub { "\t" x $curlevel };
$p->handler(start => sub {
my $tagname=shift;
my $text=shift;
if ($tagname =~ /^h(\d+)$/i) {
my $level=$1;
my $anchor="index".++$anchors{$level}."h$level";
$page.="$text<a name=\"$anchor\"></a>";
# Unless we're given startlevel as a parameter,
# take the first header level seen as the topmost level,
# even if there are higher levels seen later on.
if (! $startlevel) {
$startlevel=$level;
$curlevel=$startlevel-1;
}
elsif (defined $params{startlevel} &&
$level < $params{startlevel}) {
return;
}
elsif ($level < $startlevel) {
$level=$startlevel;
}
return if $level - $startlevel >= $params{levels};
if ($level > $curlevel) {
while ($level > $curlevel + 1) {
$index.=&$indent."<ol>\n";
$curlevel++;
$index.=&$indent."<li class=\"L$curlevel\">\n";
}
$index.=&$indent."<ol>\n";
$curlevel=$level;
$liststarted=1;
}
elsif ($level < $curlevel) {
while ($level < $curlevel) {
$index.=&$indent."</li>\n" if $curlevel;
$curlevel--;
$index.=&$indent."</ol>\n";
}
$liststarted=0;
}
$index.=&$indent."</li>\n" unless $liststarted;
$liststarted=0;
$index.=&$indent."<li class=\"L$curlevel\">".
"<a href=\"#$anchor\">";
$p->handler(text => sub {
$page.=join("", @_);
$index.=join("", @_);
}, "dtext");
$p->handler(end => sub {
my $tagname=shift;
if ($tagname =~ /^h(\d+)$/i) {
$p->handler(text => undef);
$p->handler(end => undef);
$index.="</a>\n";
}
$page.=join("", @_);
}, "tagname, text");
}
else {
$page.=$text;
}
}, "tagname, text");
$p->handler(default => sub { $page.=join("", @_) }, "text");
$p->parse($content);
$p->eof;
while ($startlevel && $curlevel >= $startlevel) {
$index.=&$indent."</li>\n" if $curlevel;
$curlevel--;
$index.=&$indent."</ol>\n";
}
$page=~s/(<div class=\"toc\">)/$1\n$index/;
return $page;
}
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