filters: Simplify converters

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

1 files changed, 0 insertions, 1727 deletions

diff --git a/filters/html-converters/resources/markdown.pl b/filters/html-converters/resources/markdown.pl
deleted file mode 100755
index 4c39808..0000000
--- a/filters/html-converters/resources/markdown.pl
+++ /dev/null
@@ -1,1727 +0,0 @@
-#!/usr/bin/perl
-
-#
-# Markdown -- A text-to-HTML conversion tool for web writers
-#
-# Copyright (c) 2004 John Gruber
-# <http://daringfireball.net/projects/markdown/>
-#
-
-
-package Markdown;
-require 5.006_000;
-use strict;
-use warnings;
-
-use Digest::MD5 qw(md5_hex);
-use vars qw($VERSION);
-$VERSION = '1.0.1';
-# Tue 14 Dec 2004
-
-
-#
-# Global default settings:
-#
-my $g_empty_element_suffix = " />";     # Change to ">" for HTML output
-my $g_tab_width = 4;
-
-
-#
-# Globals:
-#
-
-# Regex to match balanced [brackets]. See Friedl's
-# "Mastering Regular Expressions", 2nd Ed., pp. 328-331.
-my $g_nested_brackets;
-$g_nested_brackets = qr{
-	(?> 								# Atomic matching
-	   [^\[\]]+							# Anything other than brackets
-	 |
-	   \[
-		 (??{ $g_nested_brackets })		# Recursive set of nested brackets
-	   \]
-	)*
-}x;
-
-
-# Table of hash values for escaped characters:
-my %g_escape_table;
-foreach my $char (split //, '\\`*_{}[]()>#+-.!') {
-	$g_escape_table{$char} = md5_hex($char);
-}
-
-
-# Global hashes, used by various utility routines
-my %g_urls;
-my %g_titles;
-my %g_html_blocks;
-
-# Used to track when we're inside an ordered or unordered list
-# (see _ProcessListItems() for details):
-my $g_list_level = 0;
-
-
-#### Blosxom plug-in interface ##########################################
-
-# Set $g_blosxom_use_meta to 1 to use Blosxom's meta plug-in to determine
-# which posts Markdown should process, using a "meta-markup: markdown"
-# header. If it's set to 0 (the default), Markdown will process all
-# entries.
-my $g_blosxom_use_meta = 0;
-
-sub start { 1; }
-sub story {
-	my($pkg, $path, $filename, $story_ref, $title_ref, $body_ref) = @_;
-
-	if ( (! $g_blosxom_use_meta) or
-	     (defined($meta::markup) and ($meta::markup =~ /^\s*markdown\s*$/i))
-	     ){
-			$$body_ref  = Markdown($$body_ref);
-     }
-     1;
-}
-
-
-#### Movable Type plug-in interface #####################################
-eval {require MT};  # Test to see if we're running in MT.
-unless ($@) {
-    require MT;
-    import  MT;
-    require MT::Template::Context;
-    import  MT::Template::Context;
-
-	eval {require MT::Plugin};  # Test to see if we're running >= MT 3.0.
-	unless ($@) {
-		require MT::Plugin;
-		import  MT::Plugin;
-		my $plugin = new MT::Plugin({
-			name => "Markdown",
-			description => "A plain-text-to-HTML formatting plugin. (Version: $VERSION)",
-			doc_link => 'http://daringfireball.net/projects/markdown/'
-		});
-		MT->add_plugin( $plugin );
-	}
-
-	MT::Template::Context->add_container_tag(MarkdownOptions => sub {
-		my $ctx	 = shift;
-		my $args = shift;
-		my $builder = $ctx->stash('builder');
-		my $tokens = $ctx->stash('tokens');
-
-		if (defined ($args->{'output'}) ) {
-			$ctx->stash('markdown_output', lc $args->{'output'});
-		}
-
-		defined (my $str = $builder->build($ctx, $tokens) )
-			or return $ctx->error($builder->errstr);
-		$str;		# return value
-	});
-
-	MT->add_text_filter('markdown' => {
-		label     => 'Markdown',
-		docs      => 'http://daringfireball.net/projects/markdown/',
-		on_format => sub {
-			my $text = shift;
-			my $ctx  = shift;
-			my $raw  = 0;
-		    if (defined $ctx) {
-				my $output = $ctx->stash('markdown_output');
-				if (defined $output  &&  $output =~ m/^html/i) {
-					$g_empty_element_suffix = ">";
-					$ctx->stash('markdown_output', '');
-				}
-				elsif (defined $output  &&  $output eq 'raw') {
-					$raw = 1;
-					$ctx->stash('markdown_output', '');
-				}
-				else {
-					$raw = 0;
-					$g_empty_element_suffix = " />";
-				}
-			}
-			$text = $raw ? $text : Markdown($text);
-			$text;
-		},
-	});
-
-	# If SmartyPants is loaded, add a combo Markdown/SmartyPants text filter:
-	my $smartypants;
-
-	{
-		no warnings "once";
-		$smartypants = $MT::Template::Context::Global_filters{'smarty_pants'};
-	}
-
-	if ($smartypants) {
-		MT->add_text_filter('markdown_with_smartypants' => {
-			label     => 'Markdown With SmartyPants',
-			docs      => 'http://daringfireball.net/projects/markdown/',
-			on_format => sub {
-				my $text = shift;
-				my $ctx  = shift;
-				if (defined $ctx) {
-					my $output = $ctx->stash('markdown_output');
-					if (defined $output  &&  $output eq 'html') {
-						$g_empty_element_suffix = ">";
-					}
-					else {
-						$g_empty_element_suffix = " />";
-					}
-				}
-				$text = Markdown($text);
-				$text = $smartypants->($text, '1');
-			},
-		});
-	}
-}
-else {
-#### BBEdit/command-line text filter interface ##########################
-# Needs to be hidden from MT (and Blosxom when running in static mode).
-
-    # We're only using $blosxom::version once; tell Perl not to warn us:
-	no warnings 'once';
-    unless ( defined($blosxom::version) ) {
-		use warnings;
-
-		#### Check for command-line switches: #################
-		my %cli_opts;
-		use Getopt::Long;
-		Getopt::Long::Configure('pass_through');
-		GetOptions(\%cli_opts,
-			'version',
-			'shortversion',
-			'html4tags',
-		);
-		if ($cli_opts{'version'}) {		# Version info
-			print "\nThis is Markdown, version $VERSION.\n";
-			print "Copyright 2004 John Gruber\n";
-			print "http://daringfireball.net/projects/markdown/\n\n";
-			exit 0;
-		}
-		if ($cli_opts{'shortversion'}) {		# Just the version number string.
-			print $VERSION;
-			exit 0;
-		}
-		if ($cli_opts{'html4tags'}) {			# Use HTML tag style instead of XHTML
-			$g_empty_element_suffix = ">";
-		}
-
-
-		#### Process incoming text: ###########################
-		my $text;
-		{
-			local $/;               # Slurp the whole file
-			$text = <>;
-		}
-	print <<'EOT';
-<style>
-.markdown-body {
-    font-size: 14px;
-    line-height: 1.6;
-    overflow: hidden;
-}
-.markdown-body>*:first-child {
-    margin-top: 0 !important;
-}
-.markdown-body>*:last-child {
-    margin-bottom: 0 !important;
-}
-.markdown-body a.absent {
-    color: #c00;
-}
-.markdown-body a.anchor {
-    display: block;
-    padding-left: 30px;
-    margin-left: -30px;
-    cursor: pointer;
-    position: absolute;
-    top: 0;
-    left: 0;
-    bottom: 0;
-}
-.markdown-body h1, .markdown-body h2, .markdown-body h3, .markdown-body h4, .markdown-body h5, .markdown-body h6 {
-    margin: 20px 0 10px;
-    padding: 0;
-    font-weight: bold;
-    -webkit-font-smoothing: antialiased;
-    cursor: text;
-    position: relative;
-}
-.markdown-body h1 .mini-icon-link, .markdown-body h2 .mini-icon-link, .markdown-body h3 .mini-icon-link, .markdown-body h4 .mini-icon-link, .markdown-body h5 .mini-icon-link, .markdown-body h6 .mini-icon-link {
-    display: none;
-    color: #000;
-}
-.markdown-body h1:hover a.anchor, .markdown-body h2:hover a.anchor, .markdown-body h3:hover a.anchor, .markdown-body h4:hover a.anchor, .markdown-body h5:hover a.anchor, .markdown-body h6:hover a.anchor {
-    text-decoration: none;
-    line-height: 1;
-    padding-left: 0;
-    margin-left: -22px;
-    top: 15%}
-.markdown-body h1:hover a.anchor .mini-icon-link, .markdown-body h2:hover a.anchor .mini-icon-link, .markdown-body h3:hover a.anchor .mini-icon-link, .markdown-body h4:hover a.anchor .mini-icon-link, .markdown-body h5:hover a.anchor .mini-icon-link, .markdown-body h6:hover a.anchor .mini-icon-link {
-    display: inline-block;
-}
-.markdown-body h1 tt, .markdown-body h1 code, .markdown-body h2 tt, .markdown-body h2 code, .markdown-body h3 tt, .markdown-body h3 code, .markdown-body h4 tt, .markdown-body h4 code, .markdown-body h5 tt, .markdown-body h5 code, .markdown-body h6 tt, .markdown-body h6 code {
-    font-size: inherit;
-}
-.markdown-body h1 {
-    font-size: 28px;
-    color: #000;
-}
-.markdown-body h2 {
-    font-size: 24px;
-    border-bottom: 1px solid #ccc;
-    color: #000;
-}
-.markdown-body h3 {
-    font-size: 18px;
-}
-.markdown-body h4 {
-    font-size: 16px;
-}
-.markdown-body h5 {
-    font-size: 14px;
-}
-.markdown-body h6 {
-    color: #777;
-    font-size: 14px;
-}
-.markdown-body p, .markdown-body blockquote, .markdown-body ul, .markdown-body ol, .markdown-body dl, .markdown-body table, .markdown-body pre {
-    margin: 15px 0;
-}
-.markdown-body hr {
-    background: transparent url("/dirty-shade.png") repeat-x 0 0;
-    border: 0 none;
-    color: #ccc;
-    height: 4px;
-    padding: 0;
-}
-.markdown-body>h2:first-child, .markdown-body>h1:first-child, .markdown-body>h1:first-child+h2, .markdown-body>h3:first-child, .markdown-body>h4:first-child, .markdown-body>h5:first-child, .markdown-body>h6:first-child {
-    margin-top: 0;
-    padding-top: 0;
-}
-.markdown-body a:first-child h1, .markdown-body a:first-child h2, .markdown-body a:first-child h3, .markdown-body a:first-child h4, .markdown-body a:first-child h5, .markdown-body a:first-child h6 {
-    margin-top: 0;
-    padding-top: 0;
-}
-.markdown-body h1+p, .markdown-body h2+p, .markdown-body h3+p, .markdown-body h4+p, .markdown-body h5+p, .markdown-body h6+p {
-    margin-top: 0;
-}
-.markdown-body li p.first {
-    display: inline-block;
-}
-.markdown-body ul, .markdown-body ol {
-    padding-left: 30px;
-}
-.markdown-body ul.no-list, .markdown-body ol.no-list {
-    list-style-type: none;
-    padding: 0;
-}
-.markdown-body ul li>:first-child, .markdown-body ul li ul:first-of-type, .markdown-body ul li ol:first-of-type, .markdown-body ol li>:first-child, .markdown-body ol li ul:first-of-type, .markdown-body ol li ol:first-of-type {
-    margin-top: 0px;
-}
-.markdown-body ul li p:last-of-type, .markdown-body ol li p:last-of-type {
-    margin-bottom: 0;
-}
-.markdown-body ul ul, .markdown-body ul ol, .markdown-body ol ol, .markdown-body ol ul {
-    margin-bottom: 0;
-}
-.markdown-body dl {
-    padding: 0;
-}
-.markdown-body dl dt {
-    font-size: 14px;
-    font-weight: bold;
-    font-style: italic;
-    padding: 0;
-    margin: 15px 0 5px;
-}
-.markdown-body dl dt:first-child {
-    padding: 0;
-}
-.markdown-body dl dt>:first-child {
-    margin-top: 0px;
-}
-.markdown-body dl dt>:last-child {
-    margin-bottom: 0px;
-}
-.markdown-body dl dd {
-    margin: 0 0 15px;
-    padding: 0 15px;
-}
-.markdown-body dl dd>:first-child {
-    margin-top: 0px;
-}
-.markdown-body dl dd>:last-child {
-    margin-bottom: 0px;
-}
-.markdown-body blockquote {
-    border-left: 4px solid #DDD;
-    padding: 0 15px;
-    color: #777;
-}
-.markdown-body blockquote>:first-child {
-    margin-top: 0px;
-}
-.markdown-body blockquote>:last-child {
-    margin-bottom: 0px;
-}
-.markdown-body table th {
-    font-weight: bold;
-}
-.markdown-body table th, .markdown-body table td {
-    border: 1px solid #ccc;
-    padding: 6px 13px;
-}
-.markdown-body table tr {
-    border-top: 1px solid #ccc;
-    background-color: #fff;
-}
-.markdown-body table tr:nth-child(2n) {
-    background-color: #f8f8f8;
-}
-.markdown-body img {
-    max-width: 100%;
-    -moz-box-sizing: border-box;
-    box-sizing: border-box;
-}
-.markdown-body span.frame {
-    display: block;
-    overflow: hidden;
-}
-.markdown-body span.frame>span {
-    border: 1px solid #ddd;
-    display: block;
-    float: left;
-    overflow: hidden;
-    margin: 13px 0 0;
-    padding: 7px;
-    width: auto;
-}
-.markdown-body span.frame span img {
-    display: block;
-    float: left;
-}
-.markdown-body span.frame span span {
-    clear: both;
-    color: #333;
-    display: block;
-    padding: 5px 0 0;
-}
-.markdown-body span.align-center {
-    display: block;
-    overflow: hidden;
-    clear: both;
-}
-.markdown-body span.align-center>span {
-    display: block;
-    overflow: hidden;
-    margin: 13px auto 0;
-    text-align: center;
-}
-.markdown-body span.align-center span img {
-    margin: 0 auto;
-    text-align: center;
-}
-.markdown-body span.align-right {
-    display: block;
-    overflow: hidden;
-    clear: both;
-}
-.markdown-body span.align-right>span {
-    display: block;
-    overflow: hidden;
-    margin: 13px 0 0;
-    text-align: right;
-}
-.markdown-body span.align-right span img {
-    margin: 0;
-    text-align: right;
-}
-.markdown-body span.float-left {
-    display: block;
-    margin-right: 13px;
-    overflow: hidden;
-    float: left;
-}
-.markdown-body span.float-left span {
-    margin: 13px 0 0;
-}
-.markdown-body span.float-right {
-    display: block;
-    margin-left: 13px;
-    overflow: hidden;
-    float: right;
-}
-.markdown-body span.float-right>span {
-    display: block;
-    overflow: hidden;
-    margin: 13px auto 0;
-    text-align: right;
-}
-.markdown-body code, .markdown-body tt {
-    margin: 0 2px;
-    padding: 0px 5px;
-    border: 1px solid #eaeaea;
-    background-color: #f8f8f8;
-    border-radius: 3px;
-}
-.markdown-body code {
-    white-space: nowrap;
-}
-.markdown-body pre>code {
-    margin: 0;
-    padding: 0;
-    white-space: pre;
-    border: none;
-    background: transparent;
-}
-.markdown-body .highlight pre, .markdown-body pre {
-    background-color: #f8f8f8;
-    border: 1px solid #ccc;
-    font-size: 13px;
-    line-height: 19px;
-    overflow: auto;
-    padding: 6px 10px;
-    border-radius: 3px;
-}
-.markdown-body pre code, .markdown-body pre tt {
-    margin: 0;
-    padding: 0;
-    background-color: transparent;
-    border: none;
-}
-</style>
-EOT
-	print "<div class='markdown-body'>";
-        print Markdown($text);
-	print "</div>";
-    }
-}
-
-
-
-sub Markdown {
-#
-# Main function. The order in which other subs are called here is
-# essential. Link and image substitutions need to happen before
-# _EscapeSpecialChars(), so that any *'s or _'s in the <a>
-# and <img> tags get encoded.
-#
-	my $text = shift;
-
-	# Clear the global hashes. If we don't clear these, you get conflicts
-	# from other articles when generating a page which contains more than
-	# one article (e.g. an index page that shows the N most recent
-	# articles):
-	%g_urls = ();
-	%g_titles = ();
-	%g_html_blocks = ();
-
-
-	# Standardize line endings:
-	$text =~ s{\r\n}{\n}g; 	# DOS to Unix
-	$text =~ s{\r}{\n}g; 	# Mac to Unix
-
-	# Make sure $text ends with a couple of newlines:
-	$text .= "\n\n";
-
-	# Convert all tabs to spaces.
-	$text = _Detab($text);
-
-	# Strip any lines consisting only of spaces and tabs.
-	# This makes subsequent regexen easier to write, because we can
-	# match consecutive blank lines with /\n+/ instead of something
-	# contorted like /[ \t]*\n+/ .
-	$text =~ s/^[ \t]+$//mg;
-
-	# Turn block-level HTML blocks into hash entries
-	$text = _HashHTMLBlocks($text);
-
-	# Strip link definitions, store in hashes.
-	$text = _StripLinkDefinitions($text);
-
-	$text = _RunBlockGamut($text);
-
-	$text = _UnescapeSpecialChars($text);
-
-	return $text . "\n";
-}
-
-
-sub _StripLinkDefinitions {
-#
-# Strips link definitions from text, stores the URLs and titles in
-# hash references.
-#
-	my $text = shift;
-	my $less_than_tab = $g_tab_width - 1;
-
-	# Link defs are in the form: ^[id]: url "optional title"
-	while ($text =~ s{
-						^[ ]{0,$less_than_tab}\[(.+)\]:	# id = $1
-						  [ \t]*
-						  \n?				# maybe *one* newline
-						  [ \t]*
-						<?(\S+?)>?			# url = $2
-						  [ \t]*
-						  \n?				# maybe one newline
-						  [ \t]*
-						(?:
-							(?<=\s)			# lookbehind for whitespace
-							["(]
-							(.+?)			# title = $3
-							[")]
-							[ \t]*
-						)?	# title is optional
-						(?:\n+|\Z)
-					}
-					{}mx) {
-		$g_urls{lc $1} = _EncodeAmpsAndAngles( $2 );	# Link IDs are case-insensitive
-		if ($3) {
-			$g_titles{lc $1} = $3;
-			$g_titles{lc $1} =~ s/"/&quot;/g;
-		}
-	}
-
-	return $text;
-}
-
-
-sub _HashHTMLBlocks {
-	my $text = shift;
-	my $less_than_tab = $g_tab_width - 1;
-
-	# Hashify HTML blocks:
-	# We only want to do this for block-level HTML tags, such as headers,
-	# lists, and tables. That's because we still want to wrap <p>s around
-	# "paragraphs" that are wrapped in non-block-level tags, such as anchors,
-	# phrase emphasis, and spans. The list of tags we're looking for is
-	# hard-coded:
-	my $block_tags_a = qr/p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math|ins|del/;
-	my $block_tags_b = qr/p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math/;
-
-	# First, look for nested blocks, e.g.:
-	# 	<div>
-	# 		<div>
-	# 		tags for inner block must be indented.
-	# 		</div>
-	# 	</div>
-	#
-	# The outermost tags must start at the left margin for this to match, and
-	# the inner nested divs must be indented.
-	# We need to do this before the next, more liberal match, because the next
-	# match will start at the first `<div>` and stop at the first `</div>`.
-	$text =~ s{
-				(						# save in $1
-					^					# start of line  (with /m)
-					<($block_tags_a)	# start tag = $2
-					\b					# word break
-					(.*\n)*?			# any number of lines, minimally matching
-					</\2>				# the matching end tag
-					[ \t]*				# trailing spaces/tabs
-					(?=\n+|\Z)	# followed by a newline or end of document
-				)
-			}{
-				my $key = md5_hex($1);
-				$g_html_blocks{$key} = $1;
-				"\n\n" . $key . "\n\n";
-			}egmx;
-
-
-	#
-	# Now match more liberally, simply from `\n<tag>` to `</tag>\n`
-	#
-	$text =~ s{
-				(						# save in $1
-					^					# start of line  (with /m)
-					<($block_tags_b)	# start tag = $2
-					\b					# word break
-					(.*\n)*?			# any number of lines, minimally matching
-					.*</\2>				# the matching end tag
-					[ \t]*				# trailing spaces/tabs
-					(?=\n+|\Z)	# followed by a newline or end of document
-				)
-			}{
-				my $key = md5_hex($1);
-				$g_html_blocks{$key} = $1;
-				"\n\n" . $key . "\n\n";
-			}egmx;
-	# Special case just for <hr />. It was easier to make a special case than
-	# to make the other regex more complicated.
-	$text =~ s{
-				(?:
-					(?<=\n\n)		# Starting after a blank line
-					|				# or
-					\A\n?			# the beginning of the doc
-				)
-				(						# save in $1
-					[ ]{0,$less_than_tab}
-					<(hr)				# start tag = $2
-					\b					# word break
-					([^<>])*?			#
-					/?>					# the matching end tag
-					[ \t]*
-					(?=\n{2,}|\Z)		# followed by a blank line or end of document
-				)
-			}{
-				my $key = md5_hex($1);
-				$g_html_blocks{$key} = $1;
-				"\n\n" . $key . "\n\n";
-			}egx;
-
-	# Special case for standalone HTML comments:
-	$text =~ s{
-				(?:
-					(?<=\n\n)		# Starting after a blank line
-					|				# or
-					\A\n?			# the beginning of the doc
-				)
-				(						# save in $1
-					[ ]{0,$less_than_tab}
-					(?s:
-						<!
-						(--.*?--\s*)+
-						>
-					)
-					[ \t]*
-					(?=\n{2,}|\Z)		# followed by a blank line or end of document
-				)
-			}{
-				my $key = md5_hex($1);
-				$g_html_blocks{$key} = $1;
-				"\n\n" . $key . "\n\n";
-			}egx;
-
-
-	return $text;
-}
-
-
-sub _RunBlockGamut {
-#
-# These are all the transformations that form block-level
-# tags like paragraphs, headers, and list items.
-#
-	my $text = shift;
-
-	$text = _DoHeaders($text);
-
-	# Do Horizontal Rules:
-	$text =~ s{^[ ]{0,2}([ ]?\*[ ]?){3,}[ \t]*$}{\n<hr$g_empty_element_suffix\n}gmx;
-	$text =~ s{^[ ]{0,2}([ ]? -[ ]?){3,}[ \t]*$}{\n<hr$g_empty_element_suffix\n}gmx;
-	$text =~ s{^[ ]{0,2}([ ]? _[ ]?){3,}[ \t]*$}{\n<hr$g_empty_element_suffix\n}gmx;
-
-	$text = _DoLists($text);
-
-	$text = _DoCodeBlocks($text);
-
-	$text = _DoBlockQuotes($text);
-
-	# We already ran _HashHTMLBlocks() before, in Markdown(), but that
-	# was to escape raw HTML in the original Markdown source. This time,
-	# we're escaping the markup we've just created, so that we don't wrap
-	# <p> tags around block-level tags.
-	$text = _HashHTMLBlocks($text);
-
-	$text = _FormParagraphs($text);
-
-	return $text;
-}
-
-
-sub _RunSpanGamut {
-#
-# These are all the transformations that occur *within* block-level
-# tags like paragraphs, headers, and list items.
-#
-	my $text = shift;
-
-	$text = _DoCodeSpans($text);
-
-	$text = _EscapeSpecialChars($text);
-
-	# Process anchor and image tags. Images must come first,
-	# because ![foo][f] looks like an anchor.
-	$text = _DoImages($text);
-	$text = _DoAnchors($text);
-
-	# Make links out of things like `<http://example.com/>`
-	# Must come after _DoAnchors(), because you can use < and >
-	# delimiters in inline links like [this](<url>).
-	$text = _DoAutoLinks($text);
-
-	$text = _EncodeAmpsAndAngles($text);
-
-	$text = _DoItalicsAndBold($text);
-
-	# Do hard breaks:
-	$text =~ s/ {2,}\n/ <br$g_empty_element_suffix\n/g;
-
-	return $text;
-}
-
-
-sub _EscapeSpecialChars {
-	my $text = shift;
-	my $tokens ||= _TokenizeHTML($text);
-
-	$text = '';   # rebuild $text from the tokens
-# 	my $in_pre = 0;	 # Keep track of when we're inside <pre> or <code> tags.
-# 	my $tags_to_skip = qr!<(/?)(?:pre|code|kbd|script|math)[\s>]!;
-
-	foreach my $cur_token (@$tokens) {
-		if ($cur_token->[0] eq "tag") {
-			# Within tags, encode * and _ so they don't conflict
-			# with their use in Markdown for italics and strong.
-			# We're replacing each such character with its
-			# corresponding MD5 checksum value; this is likely
-			# overkill, but it should prevent us from colliding
-			# with the escape values by accident.
-			$cur_token->[1] =~  s! \* !$g_escape_table{'*'}!gx;
-			$cur_token->[1] =~  s! _  !$g_escape_table{'_'}!gx;
-			$text .= $cur_token->[1];
-		} else {
-			my $t = $cur_token->[1];
-			$t = _EncodeBackslashEscapes($t);
-			$text .= $t;
-		}
-	}
-	return $text;
-}
-
-
-sub _DoAnchors {
-#
-# Turn Markdown link shortcuts into XHTML <a> tags.
-#
-	my $text = shift;
-
-	#
-	# First, handle reference-style links: [link text] [id]
-	#
-	$text =~ s{
-		(					# wrap whole match in $1
-		  \[
-		    ($g_nested_brackets)	# link text = $2
-		  \]
-
-		  [ ]?				# one optional space
-		  (?:\n[ ]*)?		# one optional newline followed by spaces
-
-		  \[
-		    (.*?)		# id = $3
-		  \]
-		)
-	}{
-		my $result;
-		my $whole_match = $1;
-		my $link_text   = $2;
-		my $link_id     = lc $3;
-
-		if ($link_id eq "") {
-			$link_id = lc $link_text;     # for shortcut links like [this][].
-		}
-
-		if (defined $g_urls{$link_id}) {
-			my $url = $g_urls{$link_id};
-			$url =~ s! \* !$g_escape_table{'*'}!gx;		# We've got to encode these to avoid
-			$url =~ s!  _ !$g_escape_table{'_'}!gx;		# conflicting with italics/bold.
-			$result = "<a href=\"$url\"";
-			if ( defined $g_titles{$link_id} ) {
-				my $title = $g_titles{$link_id};
-				$title =~ s! \* !$g_escape_table{'*'}!gx;
-				$title =~ s!  _ !$g_escape_table{'_'}!gx;
-				$result .=  " title=\"$title\"";
-			}
-			$result .= ">$link_text</a>";
-		}
-		else {
-			$result = $whole_match;
-		}
-		$result;
-	}xsge;
-
-	#
-	# Next, inline-style links: [link text](url "optional title")
-	#
-	$text =~ s{
-		(				# wrap whole match in $1
-		  \[
-		    ($g_nested_brackets)	# link text = $2
-		  \]
-		  \(			# literal paren
-		  	[ \t]*
-			<?(.*?)>?	# href = $3
-		  	[ \t]*
-			(			# $4
-			  (['"])	# quote char = $5
-			  (.*?)		# Title = $6
-			  \5		# matching quote
-			)?			# title is optional
-		  \)
-		)
-	}{
-		my $result;
-		my $whole_match = $1;
-		my $link_text   = $2;
-		my $url	  		= $3;
-		my $title		= $6;
-
-		$url =~ s! \* !$g_escape_table{'*'}!gx;		# We've got to encode these to avoid
-		$url =~ s!  _ !$g_escape_table{'_'}!gx;		# conflicting with italics/bold.
-		$result = "<a href=\"$url\"";
-
-		if (defined $title) {
-			$title =~ s/"/&quot;/g;
-			$title =~ s! \* !$g_escape_table{'*'}!gx;
-			$title =~ s!  _ !$g_escape_table{'_'}!gx;
-			$result .=  " title=\"$title\"";
-		}
-
-		$result .= ">$link_text</a>";
-
-		$result;
-	}xsge;
-
-	return $text;
-}
-
-
-sub _DoImages {
-#
-# Turn Markdown image shortcuts into <img> tags.
-#
-	my $text = shift;
-
-	#
-	# First, handle reference-style labeled images: ![alt text][id]
-	#
-	$text =~ s{
-		(				# wrap whole match in $1
-		  !\[
-		    (.*?)		# alt text = $2
-		  \]
-
-		  [ ]?				# one optional space
-		  (?:\n[ ]*)?		# one optional newline followed by spaces
-
-		  \[
-		    (.*?)		# id = $3
-		  \]
-
-		)
-	}{
-		my $result;
-		my $whole_match = $1;
-		my $alt_text    = $2;
-		my $link_id     = lc $3;
-
-		if ($link_id eq "") {
-			$link_id = lc $alt_text;     # for shortcut links like ![this][].
-		}
-
-		$alt_text =~ s/"/&quot;/g;
-		if (defined $g_urls{$link_id}) {
-			my $url = $g_urls{$link_id};
-			$url =~ s! \* !$g_escape_table{'*'}!gx;		# We've got to encode these to avoid
-			$url =~ s!  _ !$g_escape_table{'_'}!gx;		# conflicting with italics/bold.
-			$result = "<img src=\"$url\" alt=\"$alt_text\"";
-			if (defined $g_titles{$link_id}) {
-				my $title = $g_titles{$link_id};
-				$title =~ s! \* !$g_escape_table{'*'}!gx;
-				$title =~ s!  _ !$g_escape_table{'_'}!gx;
-				$result .=  " title=\"$title\"";
-			}
-			$result .= $g_empty_element_suffix;
-		}
-		else {
-			# If there's no such link ID, leave intact:
-			$result = $whole_match;
-		}
-
-		$result;
-	}xsge;
-
-	#
-	# Next, handle inline images:  ![alt text](url "optional title")
-	# Don't forget: encode * and _
-
-	$text =~ s{
-		(				# wrap whole match in $1
-		  !\[
-		    (.*?)		# alt text = $2
-		  \]
-		  \(			# literal paren
-		  	[ \t]*
-			<?(\S+?)>?	# src url = $3
-		  	[ \t]*
-			(			# $4
-			  (['"])	# quote char = $5
-			  (.*?)		# title = $6
-			  \5		# matching quote
-			  [ \t]*
-			)?			# title is optional
-		  \)
-		)
-	}{
-		my $result;
-		my $whole_match = $1;
-		my $alt_text    = $2;
-		my $url	  		= $3;
-		my $title		= '';
-		if (defined($6)) {
-			$title		= $6;
-		}
-
-		$alt_text =~ s/"/&quot;/g;
-		$title    =~ s/"/&quot;/g;
-		$url =~ s! \* !$g_escape_table{'*'}!gx;		# We've got to encode these to avoid
-		$url =~ s!  _ !$g_escape_table{'_'}!gx;		# conflicting with italics/bold.
-		$result = "<img src=\"$url\" alt=\"$alt_text\"";
-		if (defined $title) {
-			$title =~ s! \* !$g_escape_table{'*'}!gx;
-			$title =~ s!  _ !$g_escape_table{'_'}!gx;
-			$result .=  " title=\"$title\"";
-		}
-		$result .= $g_empty_element_suffix;
-
-		$result;
-	}xsge;
-
-	return $text;
-}
-
-
-sub _DoHeaders {
-	my $text = shift;
-
-	# Setext-style headers:
-	#	  Header 1
-	#	  ========
-	#
-	#	  Header 2
-	#	  --------
-	#
-	$text =~ s{ ^(.+)[ \t]*\n=+[ \t]*\n+ }{
-		"<h1>"  .  _RunSpanGamut($1)  .  "</h1>\n\n";
-	}egmx;
-
-	$text =~ s{ ^(.+)[ \t]*\n-+[ \t]*\n+ }{
-		"<h2>"  .  _RunSpanGamut($1)  .  "</h2>\n\n";
-	}egmx;
-
-
-	# atx-style headers:
-	#	# Header 1
-	#	## Header 2
-	#	## Header 2 with closing hashes ##
-	#	...
-	#	###### Header 6
-	#
-	$text =~ s{
-			^(\#{1,6})	# $1 = string of #'s
-			[ \t]*
-			(.+?)		# $2 = Header text
-			[ \t]*
-			\#*			# optional closing #'s (not counted)
-			\n+
-		}{
-			my $h_level = length($1);
-			"<h$h_level>"  .  _RunSpanGamut($2)  .  "</h$h_level>\n\n";
-		}egmx;
-
-	return $text;
-}
-
-
-sub _DoLists {
-#
-# Form HTML ordered (numbered) and unordered (bulleted) lists.
-#
-	my $text = shift;
-	my $less_than_tab = $g_tab_width - 1;
-
-	# Re-usable patterns to match list item bullets and number markers:
-	my $marker_ul  = qr/[*+-]/;
-	my $marker_ol  = qr/\d+[.]/;
-	my $marker_any = qr/(?:$marker_ul|$marker_ol)/;
-
-	# Re-usable pattern to match any entirel ul or ol list:
-	my $whole_list = qr{
-		(								# $1 = whole list
-		  (								# $2
-			[ ]{0,$less_than_tab}
-			(${marker_any})				# $3 = first list item marker
-			[ \t]+
-		  )
-		  (?s:.+?)
-		  (								# $4
-			  \z
-			|
-			  \n{2,}
-			  (?=\S)
-			  (?!						# Negative lookahead for another list item marker
-				[ \t]*
-				${marker_any}[ \t]+
-			  )
-		  )
-		)
-	}mx;
-
-	# We use a different prefix before nested lists than top-level lists.
-	# See extended comment in _ProcessListItems().
-	#
-	# Note: There's a bit of duplication here. My original implementation
-	# created a scalar regex pattern as the conditional result of the test on
-	# $g_list_level, and then only ran the $text =~ s{...}{...}egmx
-	# substitution once, using the scalar as the pattern. This worked,
-	# everywhere except when running under MT on my hosting account at Pair
-	# Networks. There, this caused all rebuilds to be killed by the reaper (or
-	# perhaps they crashed, but that seems incredibly unlikely given that the
-	# same script on the same server ran fine *except* under MT. I've spent
-	# more time trying to figure out why this is happening than I'd like to
-	# admit. My only guess, backed up by the fact that this workaround works,
-	# is that Perl optimizes the substition when it can figure out that the
-	# pattern will never change, and when this optimization isn't on, we run
-	# afoul of the reaper. Thus, the slightly redundant code to that uses two
-	# static s/// patterns rather than one conditional pattern.
-
-	if ($g_list_level) {
-		$text =~ s{
-				^
-				$whole_list
-			}{
-				my $list = $1;
-				my $list_type = ($3 =~ m/$marker_ul/) ? "ul" : "ol";
-				# Turn double returns into triple returns, so that we can make a
-				# paragraph for the last item in a list, if necessary:
-				$list =~ s/\n{2,}/\n\n\n/g;
-				my $result = _ProcessListItems($list, $marker_any);
-				$result = "<$list_type>\n" . $result . "</$list_type>\n";
-				$result;
-			}egmx;
-	}
-	else {
-		$text =~ s{
-				(?:(?<=\n\n)|\A\n?)
-				$whole_list
-			}{
-				my $list = $1;
-				my $list_type = ($3 =~ m/$marker_ul/) ? "ul" : "ol";
-				# Turn double returns into triple returns, so that we can make a
-				# paragraph for the last item in a list, if necessary:
-				$list =~ s/\n{2,}/\n\n\n/g;
-				my $result = _ProcessListItems($list, $marker_any);
-				$result = "<$list_type>\n" . $result . "</$list_type>\n";
-				$result;
-			}egmx;
-	}
-
-
-	return $text;
-}
-
-
-sub _ProcessListItems {
-#
-#	Process the contents of a single ordered or unordered list, splitting it
-#	into individual list items.
-#
-
-	my $list_str = shift;
-	my $marker_any = shift;
-
-
-	# The $g_list_level global keeps track of when we're inside a list.
-	# Each time we enter a list, we increment it; when we leave a list,
-	# we decrement. If it's zero, we're not in a list anymore.
-	#
-	# We do this because when we're not inside a list, we want to treat
-	# something like this:
-	#
-	#		I recommend upgrading to version
-	#		8. Oops, now this line is treated
-	#		as a sub-list.
-	#
-	# As a single paragraph, despite the fact that the second line starts
-	# with a digit-period-space sequence.
-	#
-	# Whereas when we're inside a list (or sub-list), that line will be
-	# treated as the start of a sub-list. What a kludge, huh? This is
-	# an aspect of Markdown's syntax that's hard to parse perfectly
-	# without resorting to mind-reading. Perhaps the solution is to
-	# change the syntax rules such that sub-lists must start with a
-	# starting cardinal number; e.g. "1." or "a.".
-
-	$g_list_level++;
-
-	# trim trailing blank lines:
-	$list_str =~ s/\n{2,}\z/\n/;
-
-
-	$list_str =~ s{
-		(\n)?							# leading line = $1
-		(^[ \t]*)						# leading whitespace = $2
-		($marker_any) [ \t]+			# list marker = $3
-		((?s:.+?)						# list item text   = $4
-		(\n{1,2}))
-		(?= \n* (\z | \2 ($marker_any) [ \t]+))
-	}{
-		my $item = $4;
-		my $leading_line = $1;
-		my $leading_space = $2;
-
-		if ($leading_line or ($item =~ m/\n{2,}/)) {
-			$item = _RunBlockGamut(_Outdent($item));
-		}
-		else {
-			# Recursion for sub-lists:
-			$item = _DoLists(_Outdent($item));
-			chomp $item;
-			$item = _RunSpanGamut($item);
-		}
-
-		"<li>" . $item . "</li>\n";
-	}egmx;
-
-	$g_list_level--;
-	return $list_str;
-}
-
-
-
-sub _DoCodeBlocks {
-#
-#	Process Markdown `<pre><code>` blocks.
-#
-
-	my $text = shift;
-
-	$text =~ s{
-			(?:\n\n|\A)
-			(	            # $1 = the code block -- one or more lines, starting with a space/tab
-			  (?:
-			    (?:[ ]{$g_tab_width} | \t)  # Lines must start with a tab or a tab-width of spaces
-			    .*\n+
-			  )+
-			)
-			((?=^[ ]{0,$g_tab_width}\S)|\Z)	# Lookahead for non-space at line-start, or end of doc
-		}{
-			my $codeblock = $1;
-			my $result; # return value
-
-			$codeblock = _EncodeCode(_Outdent($codeblock));
-			$codeblock = _Detab($codeblock);
-			$codeblock =~ s/\A\n+//; # trim leading newlines
-			$codeblock =~ s/\s+\z//; # trim trailing whitespace
-
-			$result = "\n\n<pre><code>" . $codeblock . "\n</code></pre>\n\n";
-
-			$result;
-		}egmx;
-
-	return $text;
-}
-
-
-sub _DoCodeSpans {
-#
-# 	*	Backtick quotes are used for <code></code> spans.
-#
-# 	*	You can use multiple backticks as the delimiters if you want to
-# 		include literal backticks in the code span. So, this input:
-#
-#         Just type ``foo `bar` baz`` at the prompt.
-#
-#     	Will translate to:
-#
-#         <p>Just type <code>foo `bar` baz</code> at the prompt.</p>
-#
-#		There's no arbitrary limit to the number of backticks you
-#		can use as delimters. If you need three consecutive backticks
-#		in your code, use four for delimiters, etc.
-#
-#	*	You can use spaces to get literal backticks at the edges:
-#
-#         ... type `` `bar` `` ...
-#
-#     	Turns to:
-#
-#         ... type <code>`bar`</code> ...
-#
-
-	my $text = shift;
-
-	$text =~ s@
-			(`+)		# $1 = Opening run of `
-			(.+?)		# $2 = The code block
-			(?<!`)
-			\1			# Matching closer
-			(?!`)
-		@
- 			my $c = "$2";
- 			$c =~ s/^[ \t]*//g; # leading whitespace
- 			$c =~ s/[ \t]*$//g; # trailing whitespace
- 			$c = _EncodeCode($c);
-			"<code>$c</code>";
-		@egsx;
-
-	return $text;
-}
-
-
-sub _EncodeCode {
-#
-# Encode/escape certain characters inside Markdown code runs.
-# The point is that in code, these characters are literals,
-# and lose their special Markdown meanings.
-#
-    local $_ = shift;
-
-	# Encode all ampersands; HTML entities are not
-	# entities within a Markdown code span.
-	s/&/&amp;/g;
-
-	# Encode $'s, but only if we're running under Blosxom.
-	# (Blosxom interpolates Perl variables in article bodies.)
-	{
-		no warnings 'once';
-    	if (defined($blosxom::version)) {
-		s/\$/&#036;/g;
-    	}
-    }
-
-
-	# Do the angle bracket song and dance:
-	s! <  !&lt;!gx;
-	s! >  !&gt;!gx;
-
-	# Now, escape characters that are magic in Markdown:
-	s! \* !$g_escape_table{'*'}!gx;
-	s! _  !$g_escape_table{'_'}!gx;
-	s! {  !$g_escape_table{'{'}!gx;
-	s! }  !$g_escape_table{'}'}!gx;
-	s! \[ !$g_escape_table{'['}!gx;
-	s! \] !$g_escape_table{']'}!gx;
-	s! \\ !$g_escape_table{'\\'}!gx;
-
-	return $_;
-}
-
-
-sub _DoItalicsAndBold {
-	my $text = shift;
-
-	# <strong> must go first:
-	$text =~ s{ (\*\*|__) (?=\S) (.+?[*_]*) (?<=\S) \1 }
-		{<strong>$2</strong>}gsx;
-
-	$text =~ s{ (\*|_) (?=\S) (.+?) (?<=\S) \1 }
-		{<em>$2</em>}gsx;
-
-	return $text;
-}
-
-
-sub _DoBlockQuotes {
-	my $text = shift;
-
-	$text =~ s{
-		  (								# Wrap whole match in $1
-			(
-			  ^[ \t]*>[ \t]?			# '>' at the start of a line
-			    .+\n					# rest of the first line
-			  (.+\n)*					# subsequent consecutive lines
-			  \n*						# blanks
-			)+
-		  )
-		}{
-			my $bq = $1;
-			$bq =~ s/^[ \t]*>[ \t]?//gm;	# trim one level of quoting
-			$bq =~ s/^[ \t]+$//mg;			# trim whitespace-only lines
-			$bq = _RunBlockGamut($bq);		# recurse
-
-			$bq =~ s/^/  /g;
-			# These leading spaces screw with <pre> content, so we need to fix that:
-			$bq =~ s{
-					(\s*<pre>.+?</pre>)
-				}{
-					my $pre = $1;
-					$pre =~ s/^  //mg;
-					$pre;
-				}egsx;
-
-			"<blockquote>\n$bq\n</blockquote>\n\n";
-		}egmx;
-
-
-	return $text;
-}
-
-
-sub _FormParagraphs {
-#
-#	Params:
-#		$text - string to process with html <p> tags
-#
-	my $text = shift;
-
-	# Strip leading and trailing lines:
-	$text =~ s/\A\n+//;
-	$text =~ s/\n+\z//;
-
-	my @grafs = split(/\n{2,}/, $text);
-
-	#
-	# Wrap <p> tags.
-	#
-	foreach (@grafs) {
-		unless (defined( $g_html_blocks{$_} )) {
-			$_ = _RunSpanGamut($_);
-			s/^([ \t]*)/<p>/;
-			$_ .= "</p>";
-		}
-	}
-
-	#
-	# Unhashify HTML blocks
-	#
-	foreach (@grafs) {
-		if (defined( $g_html_blocks{$_} )) {
-			$_ = $g_html_blocks{$_};
-		}
-	}
-
-	return join "\n\n", @grafs;
-}
-
-
-sub _EncodeAmpsAndAngles {
-# Smart processing for ampersands and angle brackets that need to be encoded.
-
-	my $text = shift;
-
-	# Ampersand-encoding based entirely on Nat Irons's Amputator MT plugin:
-	#   http://bumppo.net/projects/amputator/
- 	$text =~ s/&(?!#?[xX]?(?:[0-9a-fA-F]+|\w+);)/&amp;/g;
-
-	# Encode naked <'s
- 	$text =~ s{<(?![a-z/?\$!])}{&lt;}gi;
-
-	return $text;
-}
-
-
-sub _EncodeBackslashEscapes {
-#
-#   Parameter:  String.
-#   Returns:    The string, with after processing the following backslash
-#               escape sequences.
-#
-    local $_ = shift;
-
-    s! \\\\  !$g_escape_table{'\\'}!gx;		# Must process escaped backslashes first.
-    s! \\`   !$g_escape_table{'`'}!gx;
-    s! \\\*  !$g_escape_table{'*'}!gx;
-    s! \\_   !$g_escape_table{'_'}!gx;
-    s! \\\{  !$g_escape_table{'{'}!gx;
-    s! \\\}  !$g_escape_table{'}'}!gx;
-    s! \\\[  !$g_escape_table{'['}!gx;
-    s! \\\]  !$g_escape_table{']'}!gx;
-    s! \\\(  !$g_escape_table{'('}!gx;
-    s! \\\)  !$g_escape_table{')'}!gx;
-    s! \\>   !$g_escape_table{'>'}!gx;
-    s! \\\#  !$g_escape_table{'#'}!gx;
-    s! \\\+  !$g_escape_table{'+'}!gx;
-    s! \\\-  !$g_escape_table{'-'}!gx;
-    s! \\\.  !$g_escape_table{'.'}!gx;
-    s{ \\!  }{$g_escape_table{'!'}}gx;
-
-    return $_;
-}
-
-
-sub _DoAutoLinks {
-	my $text = shift;
-
-	$text =~ s{<((https?|ftp):[^'">\s]+)>}{<a href="$1">$1</a>}gi;
-
-	# Email addresses: <address@domain.foo>
-	$text =~ s{
-		<
-        (?:mailto:)?
-		(
-			[-.\w]+
-			\@
-			[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+
-		)
-		>
-	}{
-		_EncodeEmailAddress( _UnescapeSpecialChars($1) );
-	}egix;
-
-	return $text;
-}
-
-
-sub _EncodeEmailAddress {
-#
-#	Input: an email address, e.g. "foo@example.com"
-#
-#	Output: the email address as a mailto link, with each character
-#		of the address encoded as either a decimal or hex entity, in
-#		the hopes of foiling most address harvesting spam bots. E.g.:
-#
-#	  <a href="&#x6D;&#97;&#105;&#108;&#x74;&#111;:&#102;&#111;&#111;&#64;&#101;
-#       x&#x61;&#109;&#x70;&#108;&#x65;&#x2E;&#99;&#111;&#109;">&#102;&#111;&#111;
-#       &#64;&#101;x&#x61;&#109;&#x70;&#108;&#x65;&#x2E;&#99;&#111;&#109;</a>
-#
-#	Based on a filter by Matthew Wickline, posted to the BBEdit-Talk
-#	mailing list: <http://tinyurl.com/yu7ue>
-#
-
-	my $addr = shift;
-
-	srand;
-	my @encode = (
-		sub { '&#' .                 ord(shift)   . ';' },
-		sub { '&#x' . sprintf( "%X", ord(shift) ) . ';' },
-		sub {                            shift          },
-	);
-
-	$addr = "mailto:" . $addr;
-
-	$addr =~ s{(.)}{
-		my $char = $1;
-		if ( $char eq '@' ) {
-			# this *must* be encoded. I insist.
-			$char = $encode[int rand 1]->($char);
-		} elsif ( $char ne ':' ) {
-			# leave ':' alone (to spot mailto: later)
-			my $r = rand;
-			# roughly 10% raw, 45% hex, 45% dec
-			$char = (
-				$r > .9   ?  $encode[2]->($char)  :
-				$r < .45  ?  $encode[1]->($char)  :
-							 $encode[0]->($char)
-			);
-		}
-		$char;
-	}gex;
-
-	$addr = qq{<a href="$addr">$addr</a>};
-	$addr =~ s{">.+?:}{">}; # strip the mailto: from the visible part
-
-	return $addr;
-}
-
-
-sub _UnescapeSpecialChars {
-#
-# Swap back in all the special characters we've hidden.
-#
-	my $text = shift;
-
-	while( my($char, $hash) = each(%g_escape_table) ) {
-		$text =~ s/$hash/$char/g;
-	}
-    return $text;
-}
-
-
-sub _TokenizeHTML {
-#
-#   Parameter:  String containing HTML markup.
-#   Returns:    Reference to an array of the tokens comprising the input
-#               string. Each token is either a tag (possibly with nested,
-#               tags contained therein, such as <a href="<MTFoo>">, or a
-#               run of text between tags. Each element of the array is a
-#               two-element array; the first is either 'tag' or 'text';
-#               the second is the actual value.
-#
-#
-#   Derived from the _tokenize() subroutine from Brad Choate's MTRegex plugin.
-#       <http://www.bradchoate.com/past/mtregex.php>
-#
-
-    my $str = shift;
-    my $pos = 0;
-    my $len = length $str;
-    my @tokens;
-
-    my $depth = 6;
-    my $nested_tags = join('|', ('(?:<[a-z/!$](?:[^<>]') x $depth) . (')*>)' x  $depth);
-    my $match = qr/(?s: <! ( -- .*? -- \s* )+ > ) |  # comment
-                   (?s: <\? .*? \?> ) |              # processing instruction
-                   $nested_tags/ix;                   # nested tags
-
-    while ($str =~ m/($match)/g) {
-        my $whole_tag = $1;
-        my $sec_start = pos $str;
-        my $tag_start = $sec_start - length $whole_tag;
-        if ($pos < $tag_start) {
-            push @tokens, ['text', substr($str, $pos, $tag_start - $pos)];
-        }
-        push @tokens, ['tag', $whole_tag];
-        $pos = pos $str;
-    }
-    push @tokens, ['text', substr($str, $pos, $len - $pos)] if $pos < $len;
-    \@tokens;
-}
-
-
-sub _Outdent {
-#
-# Remove one level of line-leading tabs or spaces
-#
-	my $text = shift;
-
-	$text =~ s/^(\t|[ ]{1,$g_tab_width})//gm;
-	return $text;
-}
-
-
-sub _Detab {
-#
-# Cribbed from a post by Bart Lateur:
-# <http://www.nntp.perl.org/group/perl.macperl.anyperl/154>
-#
-	my $text = shift;
-
-	$text =~ s{(.*?)\t}{$1.(' ' x ($g_tab_width - length($1) % $g_tab_width))}ge;
-	return $text;
-}
-
-
-1;
-
-__END__
-
-
-=pod
-
-=head1 NAME
-
-B<Markdown>
-
-
-=head1 SYNOPSIS
-
-B<Markdown.pl> [ B<--html4tags> ] [ B<--version> ] [ B<-shortversion> ]
-    [ I<file> ... ]
-
-
-=head1 DESCRIPTION
-
-Markdown is a text-to-HTML filter; it translates an easy-to-read /
-easy-to-write structured text format into HTML. Markdown's text format
-is most similar to that of plain text email, and supports features such
-as headers, *emphasis*, code blocks, blockquotes, and links.
-
-Markdown's syntax is designed not as a generic markup language, but
-specifically to serve as a front-end to (X)HTML. You can  use span-level
-HTML tags anywhere in a Markdown document, and you can use block level
-HTML tags (like <div> and <table> as well).
-
-For more information about Markdown's syntax, see:
-
-    http://daringfireball.net/projects/markdown/
-
-
-=head1 OPTIONS
-
-Use "--" to end switch parsing. For example, to open a file named "-z", use:
-
-	Markdown.pl -- -z
-
-=over 4
-
-
-=item B<--html4tags>
-
-Use HTML 4 style for empty element tags, e.g.:
-
-    <br>
-
-instead of Markdown's default XHTML style tags, e.g.:
-
-    <br />
-
-
-=item B<-v>, B<--version>
-
-Display Markdown's version number and copyright information.
-
-
-=item B<-s>, B<--shortversion>
-
-Display the short-form version number.
-
-
-=back
-
-
-
-=head1 BUGS
-
-To file bug reports or feature requests (other than topics listed in the
-Caveats section above) please send email to:
-
-    support@daringfireball.net
-
-Please include with your report: (1) the example input; (2) the output
-you expected; (3) the output Markdown actually produced.
-
-
-=head1 VERSION HISTORY
-
-See the readme file for detailed release notes for this version.
-
-1.0.1 - 14 Dec 2004
-
-1.0 - 28 Aug 2004
-
-
-=head1 AUTHOR
-
-    John Gruber
-    http://daringfireball.net
-
-    PHP port and other contributions by Michel Fortin
-    http://michelf.com
-
-
-=head1 COPYRIGHT AND LICENSE
-
-Copyright (c) 2003-2004 John Gruber
-<http://daringfireball.net/>
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-* Redistributions of source code must retain the above copyright notice,
-  this list of conditions and the following disclaimer.
-
-* Redistributions in binary form must reproduce the above copyright
-  notice, this list of conditions and the following disclaimer in the
-  documentation and/or other materials provided with the distribution.
-
-* Neither the name "Markdown" nor the names of its contributors may
-  be used to endorse or promote products derived from this software
-  without specific prior written permission.
-
-This software is provided by the copyright holders and contributors "as
-is" and any express or implied warranties, including, but not limited
-to, the implied warranties of merchantability and fitness for a
-particular purpose are disclaimed. In no event shall the copyright owner
-or contributors be liable for any direct, indirect, incidental, special,
-exemplary, or consequential damages (including, but not limited to,
-procurement of substitute goods or services; loss of use, data, or
-profits; or business interruption) however caused and on any theory of
-liability, whether in contract, strict liability, or tort (including
-negligence or otherwise) arising in any way out of the use of this
-software, even if advised of the possibility of such damage.
-
-=cut