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#!/usr/bin/perl
# Markdown markup language
package IkiWiki::Plugin::mdwn;
use warnings;
use strict;
use IkiWiki 3.00;
sub import {
hook(type => "checkconfig", id => "mdwn", call => \&checkconfig);
hook(type => "getsetup", id => "mdwn", call => \&getsetup);
hook(type => "htmlize", id => "mdwn", call => \&htmlize, longname => "Markdown");
hook(type => "htmlize", id => "md", call => \&htmlize, longname => "Markdown (popular file extension)", nocreate => 1);
}
sub getsetup () {
return
plugin => {
safe => 1,
rebuild => 1, # format plugin
section => "format",
},
multimarkdown => {
type => "boolean",
example => 0,
description => "enable multimarkdown features?",
safe => 1,
rebuild => 1,
},
nodiscount => {
type => "boolean",
example => 0,
description => "disable use of markdown discount?",
safe => 1,
rebuild => 1,
},
mdwn_footnotes => {
type => "boolean",
example => 1,
description => "enable footnotes in Markdown (where supported)?",
safe => 1,
rebuild => 1,
},
mdwn_alpha_lists => {
type => "boolean",
example => 0,
description => "interpret line like 'A. First item' as ordered list when using Discount?",
advanced => 1,
safe => 1,
rebuild => 1,
},
}
sub checkconfig () {
$config{mdwn_footnotes} = 1 unless defined $config{mdwn_footnotes};
$config{mdwn_alpha_lists} = 0 unless defined $config{mdwn_alpha_lists};
}
our $markdown_sub;
sub htmlize (@) {
my %params=@_;
my $content = $params{content};
if (! defined $markdown_sub) {
# Markdown is forked and splintered upstream and can be
# available in a variety of forms. Support them all.
no warnings 'once';
$blosxom::version="is a proper perl module too much to ask?";
use warnings 'all';
if (exists $config{multimarkdown} && $config{multimarkdown}) {
eval q{use Text::MultiMarkdown};
if ($@) {
debug(gettext("multimarkdown is enabled, but Text::MultiMarkdown is not installed"));
}
else {
$markdown_sub=sub {
my %flags=( use_metadata => 0 );
$flags{disable_footnotes}=not $config{mdwn_footnotes};
Text::MultiMarkdown::markdown(shift, \%flags);
}
}
}
if (! defined $markdown_sub &&
(! exists $config{nodiscount} || ! $config{nodiscount})) {
eval q{use Text::Markdown::Discount};
if (! $@) {
my $markdown = \&Text::Markdown::Discount::markdown;
my $always_flags = 0;
# Disable Pandoc-style % Title, % Author, % Date
# Use the meta plugin instead
$always_flags |= Text::Markdown::Discount::MKD_NOHEADER();
# Disable Unicodification of quote marks, em dashes...
# Use the typography plugin instead
$always_flags |= Text::Markdown::Discount::MKD_NOPANTS();
# Workaround for discount's eliding of <style> blocks.
# https://rt.cpan.org/Ticket/Display.html?id=74016
if (Text::Markdown::Discount->can('MKD_NOSTYLE')) {
$always_flags |= Text::Markdown::Discount::MKD_NOSTYLE();
}
elsif ($markdown->('<style>x</style>', 0) !~ '<style>' &&
$markdown->('<style>x</style>', 0x00400000) =~ m{<style>x</style>}) {
$always_flags |= 0x00400000;
}
# Enable fenced code blocks in libmarkdown >= 2.2.0
# https://bugs.debian.org/888055
if (Text::Markdown::Discount->can('MKD_FENCEDCODE')) {
$always_flags |= Text::Markdown::Discount::MKD_FENCEDCODE();
}
elsif ($markdown->("~~~\nx\n~~~", 0) !~ m{<pre\b} &&
$markdown->("~~~\nx\n~~~", 0x02000000) =~ m{<pre\b}) {
$always_flags |= 0x02000000;
}
# PHP Markdown Extra-style term\n: definition -> <dl>
if (Text::Markdown::Discount->can('MKD_DLEXTRA')) {
$always_flags |= Text::Markdown::Discount::MKD_DLEXTRA();
}
elsif ($markdown->("term\n: def\n", 0) !~ m{<dl>} &&
$markdown->("term\n: def\n", 0x01000000) =~ m{<dl>}) {
$always_flags |= 0x01000000;
}
# Allow dashes and underscores in tag names
if (Text::Markdown::Discount->can('MKD_GITHUBTAGS')) {
$always_flags |= Text::Markdown::Discount::MKD_GITHUBTAGS();
}
elsif ($markdown->('<foo_bar>', 0) !~ m{<foo_bar} &&
$markdown->('<foo_bar>', 0x08000000) =~ m{<foo_bar\b}) {
$always_flags |= 0x08000000;
}
$markdown_sub=sub {
my $t=shift;
# Workaround for discount binding bug
# https://rt.cpan.org/Ticket/Display.html?id=73657
return "" if $t=~/^\s*$/;
my $flags=$always_flags;
if ($config{mdwn_footnotes}) {
$flags |= Text::Markdown::Discount::MKD_EXTRA_FOOTNOTE();
}
unless ($config{mdwn_alpha_lists}) {
$flags |= Text::Markdown::Discount::MKD_NOALPHALIST();
}
return Text::Markdown::Discount::markdown($t, $flags);
}
}
}
if (! defined $markdown_sub) {
eval q{use Text::Markdown};
if (! $@) {
if (Text::Markdown->can('markdown')) {
$markdown_sub=\&Text::Markdown::markdown;
}
else {
$markdown_sub=\&Text::Markdown::Markdown;
}
}
else {
eval q{use Markdown};
if (! $@) {
$markdown_sub=\&Markdown::Markdown;
}
else {
my $error = $@;
do "/usr/bin/markdown" ||
error(sprintf(gettext("failed to load Markdown.pm perl module (%s) or /usr/bin/markdown (%s)"), $error, $!));
$markdown_sub=\&Markdown::Markdown;
}
}
}
require Encode;
}
# Workaround for perl bug (#376329)
$content=Encode::encode_utf8($content);
eval {$content=&$markdown_sub($content)};
if ($@) {
eval {$content=&$markdown_sub($content)};
print STDERR $@ if $@;
}
$content=Encode::decode_utf8($content);
return $content;
}
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