Replace Markdown parser by Parsedown

8 files changed, 1443 insertions, 3246 deletions

diff --git a/vendor/Michelf/Markdown.inc.php b/vendor/Michelf/Markdown.inc.php
deleted file mode 100644
index 8c281094..00000000
--- a/vendor/Michelf/Markdown.inc.php
+++ /dev/null
@@ -1,10 +0,0 @@
-<?php
-
-# Use this file if you cannot use class autoloading. It will include all the
-# files needed for the Markdown parser.
-#
-# Take a look at the PSR-0-compatible class autoloading implementation
-# in the Readme.php file if you want a simple autoloader setup.
-
-require_once dirname(__FILE__) . '/MarkdownInterface.php';
-require_once dirname(__FILE__) . '/Markdown.php';
diff --git a/vendor/Michelf/Markdown.php b/vendor/Michelf/Markdown.php
deleted file mode 100644
index c5245fdc..00000000
--- a/vendor/Michelf/Markdown.php
+++ /dev/null
@@ -1,3144 +0,0 @@
-<?php
-#
-# Markdown  -  A text-to-HTML conversion tool for web writers
-#
-# PHP Markdown  
-# Copyright (c) 2004-2014 Michel Fortin  
-# <http://michelf.com/projects/php-markdown/>
-#
-# Original Markdown  
-# Copyright (c) 2004-2006 John Gruber  
-# <http://daringfireball.net/projects/markdown/>
-#
-namespace Michelf;
-
-
-#
-# Markdown Parser Class
-#
-
-class Markdown implements MarkdownInterface {
-
-	### Version ###
-
-	const  MARKDOWNLIB_VERSION  =  "1.4.1";
-
-	### Simple Function Interface ###
-
-	public static function defaultTransform($text) {
-	#
-	# Initialize the parser and return the result of its transform method.
-	# This will work fine for derived classes too.
-	#
-		# Take parser class on which this function was called.
-		$parser_class = \get_called_class();
-
-		# try to take parser from the static parser list
-		static $parser_list;
-		$parser =& $parser_list[$parser_class];
-
-		# create the parser it not already set
-		if (!$parser)
-			$parser = new $parser_class;
-
-		# Transform text using parser.
-		return $parser->transform($text);
-	}
-
-	### Configuration Variables ###
-
-	# Change to ">" for HTML output.
-	public $empty_element_suffix = " />";
-	public $tab_width = 4;
-	
-	# Change to `true` to disallow markup or entities.
-	public $no_markup = false;
-	public $no_entities = false;
-	
-	# Predefined urls and titles for reference links and images.
-	public $predef_urls = array();
-	public $predef_titles = array();
-
-	# Optional filter function for URLs
-	public $url_filter_func = null;
-
-
-	### Parser Implementation ###
-
-	# Regex to match balanced [brackets].
-	# Needed to insert a maximum bracked depth while converting to PHP.
-	protected $nested_brackets_depth = 6;
-	protected $nested_brackets_re;
-	
-	protected $nested_url_parenthesis_depth = 4;
-	protected $nested_url_parenthesis_re;
-
-	# Table of hash values for escaped characters:
-	protected $escape_chars = '\`*_{}[]()>#+-.!';
-	protected $escape_chars_re;
-
-
-	public function __construct() {
-	#
-	# Constructor function. Initialize appropriate member variables.
-	#
-		$this->_initDetab();
-		$this->prepareItalicsAndBold();
-	
-		$this->nested_brackets_re = 
-			str_repeat('(?>[^\[\]]+|\[', $this->nested_brackets_depth).
-			str_repeat('\])*', $this->nested_brackets_depth);
-	
-		$this->nested_url_parenthesis_re = 
-			str_repeat('(?>[^()\s]+|\(', $this->nested_url_parenthesis_depth).
-			str_repeat('(?>\)))*', $this->nested_url_parenthesis_depth);
-		
-		$this->escape_chars_re = '['.preg_quote($this->escape_chars).']';
-		
-		# Sort document, block, and span gamut in ascendent priority order.
-		asort($this->document_gamut);
-		asort($this->block_gamut);
-		asort($this->span_gamut);
-	}
-
-
-	# Internal hashes used during transformation.
-	protected $urls = array();
-	protected $titles = array();
-	protected $html_hashes = array();
-	
-	# Status flag to avoid invalid nesting.
-	protected $in_anchor = false;
-	
-	
-	protected function setup() {
-	#
-	# Called before the transformation process starts to setup parser 
-	# states.
-	#
-		# Clear global hashes.
-		$this->urls = $this->predef_urls;
-		$this->titles = $this->predef_titles;
-		$this->html_hashes = array();
-		
-		$this->in_anchor = false;
-	}
-	
-	protected function teardown() {
-	#
-	# Called after the transformation process to clear any variable 
-	# which may be taking up memory unnecessarly.
-	#
-		$this->urls = array();
-		$this->titles = array();
-		$this->html_hashes = array();
-	}
-
-
-	public function transform($text) {
-	#
-	# Main function. Performs some preprocessing on the input text
-	# and pass it through the document gamut.
-	#
-		$this->setup();
-	
-		# Remove UTF-8 BOM and marker character in input, if present.
-		$text = preg_replace('{^\xEF\xBB\xBF|\x1A}', '', $text);
-
-		# Standardize line endings:
-		#   DOS to Unix and Mac to Unix
-		$text = preg_replace('{\r\n?}', "\n", $text);
-
-		# Make sure $text ends with a couple of newlines:
-		$text .= "\n\n";
-
-		# Convert all tabs to spaces.
-		$text = $this->detab($text);
-
-		# Turn block-level HTML blocks into hash entries
-		$text = $this->hashHTMLBlocks($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 /[ ]*\n+/ .
-		$text = preg_replace('/^[ ]+$/m', '', $text);
-
-		# Run document gamut methods.
-		foreach ($this->document_gamut as $method => $priority) {
-			$text = $this->$method($text);
-		}
-		
-		$this->teardown();
-
-		return $text . "\n";
-	}
-	
-	protected $document_gamut = array(
-		# Strip link definitions, store in hashes.
-		"stripLinkDefinitions" => 20,
-		
-		"runBasicBlockGamut"   => 30,
-		);
-
-
-	protected function stripLinkDefinitions($text) {
-	#
-	# Strips link definitions from text, stores the URLs and titles in
-	# hash references.
-	#
-		$less_than_tab = $this->tab_width - 1;
-
-		# Link defs are in the form: ^[id]: url "optional title"
-		$text = preg_replace_callback('{
-							^[ ]{0,'.$less_than_tab.'}\[(.+)\][ ]?:	# id = $1
-							  [ ]*
-							  \n?				# maybe *one* newline
-							  [ ]*
-							(?:
-							  <(.+?)>			# url = $2
-							|
-							  (\S+?)			# url = $3
-							)
-							  [ ]*
-							  \n?				# maybe one newline
-							  [ ]*
-							(?:
-								(?<=\s)			# lookbehind for whitespace
-								["(]
-								(.*?)			# title = $4
-								[")]
-								[ ]*
-							)?	# title is optional
-							(?:\n+|\Z)
-			}xm',
-			array($this, '_stripLinkDefinitions_callback'),
-			$text);
-		return $text;
-	}
-	protected function _stripLinkDefinitions_callback($matches) {
-		$link_id = strtolower($matches[1]);
-		$url = $matches[2] == '' ? $matches[3] : $matches[2];
-		$this->urls[$link_id] = $url;
-		$this->titles[$link_id] =& $matches[4];
-		return ''; # String that will replace the block
-	}
-
-
-	protected function hashHTMLBlocks($text) {
-		if ($this->no_markup)  return $text;
-
-		$less_than_tab = $this->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:
-		#
-		# *  List "a" is made of tags which can be both inline or block-level.
-		#    These will be treated block-level when the start tag is alone on 
-		#    its line, otherwise they're not matched here and will be taken as 
-		#    inline later.
-		# *  List "b" is made of tags which are always block-level;
-		#
-		$block_tags_a_re = 'ins|del';
-		$block_tags_b_re = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|address|'.
-						   'script|noscript|style|form|fieldset|iframe|math|svg|'.
-						   'article|section|nav|aside|hgroup|header|footer|'.
-						   'figure';
-
-		# Regular expression for the content of a block tag.
-		$nested_tags_level = 4;
-		$attr = '
-			(?>				# optional tag attributes
-			  \s			# starts with whitespace
-			  (?>
-				[^>"/]+		# text outside quotes
-			  |
-				/+(?!>)		# slash not followed by ">"
-			  |
-				"[^"]*"		# text inside double quotes (tolerate ">")
-			  |
-				\'[^\']*\'	# text inside single quotes (tolerate ">")
-			  )*
-			)?	
-			';
-		$content =
-			str_repeat('
-				(?>
-				  [^<]+			# content without tag
-				|
-				  <\2			# nested opening tag
-					'.$attr.'	# attributes
-					(?>
-					  />
-					|
-					  >', $nested_tags_level).	# end of opening tag
-					  '.*?'.					# last level nested tag content
-			str_repeat('
-					  </\2\s*>	# closing nested tag
-					)
-				  |				
-					<(?!/\2\s*>	# other tags with a different name
-				  )
-				)*',
-				$nested_tags_level);
-		$content2 = str_replace('\2', '\3', $content);
-
-		# 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 = preg_replace_callback('{(?>
-			(?>
-				(?<=\n)			# Starting on its own line
-				|				# or
-				\A\n?			# the at beginning of the doc
-			)
-			(						# save in $1
-
-			  # Match from `\n<tag>` to `</tag>\n`, handling nested tags 
-			  # in between.
-					
-						[ ]{0,'.$less_than_tab.'}
-						<('.$block_tags_b_re.')# start tag = $2
-						'.$attr.'>			# attributes followed by > and \n
-						'.$content.'		# content, support nesting
-						</\2>				# the matching end tag
-						[ ]*				# trailing spaces/tabs
-						(?=\n+|\Z)	# followed by a newline or end of document
-
-			| # Special version for tags of group a.
-
-						[ ]{0,'.$less_than_tab.'}
-						<('.$block_tags_a_re.')# start tag = $3
-						'.$attr.'>[ ]*\n	# attributes followed by >
-						'.$content2.'		# content, support nesting
-						</\3>				# the matching end tag
-						[ ]*				# trailing spaces/tabs
-						(?=\n+|\Z)	# followed by a newline or end of document
-					
-			| # Special case just for <hr />. It was easier to make a special 
-			  # case than to make the other regex more complicated.
-			
-						[ ]{0,'.$less_than_tab.'}
-						<(hr)				# start tag = $2
-						'.$attr.'			# attributes
-						/?>					# the matching end tag
-						[ ]*
-						(?=\n{2,}|\Z)		# followed by a blank line or end of document
-			
-			| # Special case for standalone HTML comments:
-			
-					[ ]{0,'.$less_than_tab.'}
-					(?s:
-						<!-- .*? -->
-					)
-					[ ]*
-					(?=\n{2,}|\Z)		# followed by a blank line or end of document
-			
-			| # PHP and ASP-style processor instructions (<? and <%)
-			
-					[ ]{0,'.$less_than_tab.'}
-					(?s:
-						<([?%])			# $2
-						.*?
-						\2>
-					)
-					[ ]*
-					(?=\n{2,}|\Z)		# followed by a blank line or end of document
-					
-			)
-			)}Sxmi',
-			array($this, '_hashHTMLBlocks_callback'),
-			$text);
-
-		return $text;
-	}
-	protected function _hashHTMLBlocks_callback($matches) {
-		$text = $matches[1];
-		$key  = $this->hashBlock($text);
-		return "\n\n$key\n\n";
-	}
-	
-	
-	protected function hashPart($text, $boundary = 'X') {
-	#
-	# Called whenever a tag must be hashed when a function insert an atomic 
-	# element in the text stream. Passing $text to through this function gives
-	# a unique text-token which will be reverted back when calling unhash.
-	#
-	# The $boundary argument specify what character should be used to surround
-	# the token. By convension, "B" is used for block elements that needs not
-	# to be wrapped into paragraph tags at the end, ":" is used for elements
-	# that are word separators and "X" is used in the general case.
-	#
-		# Swap back any tag hash found in $text so we do not have to `unhash`
-		# multiple times at the end.
-		$text = $this->unhash($text);
-		
-		# Then hash the block.
-		static $i = 0;
-		$key = "$boundary\x1A" . ++$i . $boundary;
-		$this->html_hashes[$key] = $text;
-		return $key; # String that will replace the tag.
-	}
-
-
-	protected function hashBlock($text) {
-	#
-	# Shortcut function for hashPart with block-level boundaries.
-	#
-		return $this->hashPart($text, 'B');
-	}
-
-
-	protected $block_gamut = array(
-	#
-	# These are all the transformations that form block-level
-	# tags like paragraphs, headers, and list items.
-	#
-		"doHeaders"         => 10,
-		"doHorizontalRules" => 20,
-		
-		"doLists"           => 40,
-		"doCodeBlocks"      => 50,
-		"doBlockQuotes"     => 60,
-		);
-
-	protected function runBlockGamut($text) {
-	#
-	# Run block gamut tranformations.
-	#
-		# We need to escape raw HTML in Markdown source before doing anything 
-		# else. This need to be done for each block, and not only at the 
-		# begining in the Markdown function since hashed blocks can be part of
-		# list items and could have been indented. Indented blocks would have 
-		# been seen as a code block in a previous pass of hashHTMLBlocks.
-		$text = $this->hashHTMLBlocks($text);
-		
-		return $this->runBasicBlockGamut($text);
-	}
-	
-	protected function runBasicBlockGamut($text) {
-	#
-	# Run block gamut tranformations, without hashing HTML blocks. This is 
-	# useful when HTML blocks are known to be already hashed, like in the first
-	# whole-document pass.
-	#
-		foreach ($this->block_gamut as $method => $priority) {
-			$text = $this->$method($text);
-		}
-		
-		# Finally form paragraph and restore hashed blocks.
-		$text = $this->formParagraphs($text);
-
-		return $text;
-	}
-	
-	
-	protected function doHorizontalRules($text) {
-		# Do Horizontal Rules:
-		return preg_replace(
-			'{
-				^[ ]{0,3}	# Leading space
-				([-*_])		# $1: First marker
-				(?>			# Repeated marker group
-					[ ]{0,2}	# Zero, one, or two spaces.
-					\1			# Marker character
-				){2,}		# Group repeated at least twice
-				[ ]*		# Tailing spaces
-				$			# End of line.
-			}mx',
-			"\n".$this->hashBlock("<hr$this->empty_element_suffix")."\n", 
-			$text);
-	}
-
-
-	protected $span_gamut = array(
-	#
-	# These are all the transformations that occur *within* block-level
-	# tags like paragraphs, headers, and list items.
-	#
-		# Process character escapes, code spans, and inline HTML
-		# in one shot.
-		"parseSpan"           => -30,
-
-		# Process anchor and image tags. Images must come first,
-		# because ![foo][f] looks like an anchor.
-		"doImages"            =>  10,
-		"doAnchors"           =>  20,
-		
-		# Make links out of things like `<http://example.com/>`
-		# Must come after doAnchors, because you can use < and >
-		# delimiters in inline links like [this](<url>).
-		"doAutoLinks"         =>  30,
-		"encodeAmpsAndAngles" =>  40,
-
-		"doItalicsAndBold"    =>  50,
-		"doHardBreaks"        =>  60,
-		);
-
-	protected function runSpanGamut($text) {
-	#
-	# Run span gamut tranformations.
-	#
-		foreach ($this->span_gamut as $method => $priority) {
-			$text = $this->$method($text);
-		}
-
-		return $text;
-	}
-	
-	
-	protected function doHardBreaks($text) {
-		# Do hard breaks:
-		return preg_replace_callback('/ {2,}\n/', 
-			array($this, '_doHardBreaks_callback'), $text);
-	}
-	protected function _doHardBreaks_callback($matches) {
-		return $this->hashPart("<br$this->empty_element_suffix\n");
-	}
-
-
-	protected function doAnchors($text) {
-	#
-	# Turn Markdown link shortcuts into XHTML <a> tags.
-	#
-		if ($this->in_anchor) return $text;
-		$this->in_anchor = true;
-		
-		#
-		# First, handle reference-style links: [link text] [id]
-		#
-		$text = preg_replace_callback('{
-			(					# wrap whole match in $1
-			  \[
-				('.$this->nested_brackets_re.')	# link text = $2
-			  \]
-
-			  [ ]?				# one optional space
-			  (?:\n[ ]*)?		# one optional newline followed by spaces
-
-			  \[
-				(.*?)		# id = $3
-			  \]
-			)
-			}xs',
-			array($this, '_doAnchors_reference_callback'), $text);
-
-		#
-		# Next, inline-style links: [link text](url "optional title")
-		#
-		$text = preg_replace_callback('{
-			(				# wrap whole match in $1
-			  \[
-				('.$this->nested_brackets_re.')	# link text = $2
-			  \]
-			  \(			# literal paren
-				[ \n]*
-				(?:
-					<(.+?)>	# href = $3
-				|
-					('.$this->nested_url_parenthesis_re.')	# href = $4
-				)
-				[ \n]*
-				(			# $5
-				  ([\'"])	# quote char = $6
-				  (.*?)		# Title = $7
-				  \6		# matching quote
-				  [ \n]*	# ignore any spaces/tabs between closing quote and )
-				)?			# title is optional
-			  \)
-			)
-			}xs',
-			array($this, '_doAnchors_inline_callback'), $text);
-
-		#
-		# Last, handle reference-style shortcuts: [link text]
-		# These must come last in case you've also got [link text][1]
-		# or [link text](/foo)
-		#
-		$text = preg_replace_callback('{
-			(					# wrap whole match in $1
-			  \[
-				([^\[\]]+)		# link text = $2; can\'t contain [ or ]
-			  \]
-			)
-			}xs',
-			array($this, '_doAnchors_reference_callback'), $text);
-
-		$this->in_anchor = false;
-		return $text;
-	}
-	protected function _doAnchors_reference_callback($matches) {
-		$whole_match =  $matches[1];
-		$link_text   =  $matches[2];
-		$link_id     =& $matches[3];
-
-		if ($link_id == "") {
-			# for shortcut links like [this][] or [this].
-			$link_id = $link_text;
-		}
-		
-		# lower-case and turn embedded newlines into spaces
-		$link_id = strtolower($link_id);
-		$link_id = preg_replace('{[ ]?\n}', ' ', $link_id);
-
-		if (isset($this->urls[$link_id])) {
-			$url = $this->urls[$link_id];
-			$url = $this->encodeURLAttribute($url);
-			
-			$result = "<a href=\"$url\"";
-			if ( isset( $this->titles[$link_id] ) ) {
-				$title = $this->titles[$link_id];
-				$title = $this->encodeAttribute($title);
-				$result .=  " title=\"$title\"";
-			}
-		
-			$link_text = $this->runSpanGamut($link_text);
-			$result .= ">$link_text</a>";
-			$result = $this->hashPart($result);
-		}
-		else {
-			$result = $whole_match;
-		}
-		return $result;
-	}
-	protected function _doAnchors_inline_callback($matches) {
-		$whole_match	=  $matches[1];
-		$link_text		=  $this->runSpanGamut($matches[2]);
-		$url			=  $matches[3] == '' ? $matches[4] : $matches[3];
-		$title			=& $matches[7];
-
-		// if the URL was of the form <s p a c e s> it got caught by the HTML
-		// tag parser and hashed. Need to reverse the process before using the URL.
-		$unhashed = $this->unhash($url);
-		if ($unhashed != $url)
-			$url = preg_replace('/^<(.*)>$/', '\1', $unhashed);
-
-		$url = $this->encodeURLAttribute($url);
-
-		$result = "<a href=\"$url\"";
-		if (isset($title)) {
-			$title = $this->encodeAttribute($title);
-			$result .=  " title=\"$title\"";
-		}
-		
-		$link_text = $this->runSpanGamut($link_text);
-		$result .= ">$link_text</a>";
-
-		return $this->hashPart($result);
-	}
-
-
-	protected function doImages($text) {
-	#
-	# Turn Markdown image shortcuts into <img> tags.
-	#
-		#
-		# First, handle reference-style labeled images: ![alt text][id]
-		#
-		$text = preg_replace_callback('{
-			(				# wrap whole match in $1
-			  !\[
-				('.$this->nested_brackets_re.')		# alt text = $2
-			  \]
-
-			  [ ]?				# one optional space
-			  (?:\n[ ]*)?		# one optional newline followed by spaces
-
-			  \[
-				(.*?)		# id = $3
-			  \]
-
-			)
-			}xs', 
-			array($this, '_doImages_reference_callback'), $text);
-
-		#
-		# Next, handle inline images:  ![alt text](url "optional title")
-		# Don't forget: encode * and _
-		#
-		$text = preg_replace_callback('{
-			(				# wrap whole match in $1
-			  !\[
-				('.$this->nested_brackets_re.')		# alt text = $2
-			  \]
-			  \s?			# One optional whitespace character
-			  \(			# literal paren
-				[ \n]*
-				(?:
-					<(\S*)>	# src url = $3
-				|
-					('.$this->nested_url_parenthesis_re.')	# src url = $4
-				)
-				[ \n]*
-				(			# $5
-				  ([\'"])	# quote char = $6
-				  (.*?)		# title = $7
-				  \6		# matching quote
-				  [ \n]*
-				)?			# title is optional
-			  \)
-			)
-			}xs',
-			array($this, '_doImages_inline_callback'), $text);
-
-		return $text;
-	}
-	protected function _doImages_reference_callback($matches) {
-		$whole_match = $matches[1];
-		$alt_text    = $matches[2];
-		$link_id     = strtolower($matches[3]);
-
-		if ($link_id == "") {
-			$link_id = strtolower($alt_text); # for shortcut links like ![this][].
-		}
-
-		$alt_text = $this->encodeAttribute($alt_text);
-		if (isset($this->urls[$link_id])) {
-			$url = $this->encodeURLAttribute($this->urls[$link_id]);
-			$result = "<img src=\"$url\" alt=\"$alt_text\"";
-			if (isset($this->titles[$link_id])) {
-				$title = $this->titles[$link_id];
-				$title = $this->encodeAttribute($title);
-				$result .=  " title=\"$title\"";
-			}
-			$result .= $this->empty_element_suffix;
-			$result = $this->hashPart($result);
-		}
-		else {
-			# If there's no such link ID, leave intact:
-			$result = $whole_match;
-		}
-
-		return $result;
-	}
-	protected function _doImages_inline_callback($matches) {
-		$whole_match	= $matches[1];
-		$alt_text		= $matches[2];
-		$url			= $matches[3] == '' ? $matches[4] : $matches[3];
-		$title			=& $matches[7];
-
-		$alt_text = $this->encodeAttribute($alt_text);
-		$url = $this->encodeURLAttribute($url);
-		$result = "<img src=\"$url\" alt=\"$alt_text\"";
-		if (isset($title)) {
-			$title = $this->encodeAttribute($title);
-			$result .=  " title=\"$title\""; # $title already quoted
-		}
-		$result .= $this->empty_element_suffix;
-
-		return $this->hashPart($result);
-	}
-
-
-	protected function doHeaders($text) {
-		# Setext-style headers:
-		#	  Header 1
-		#	  ========
-		#  
-		#	  Header 2
-		#	  --------
-		#
-		$text = preg_replace_callback('{ ^(.+?)[ ]*\n(=+|-+)[ ]*\n+ }mx',
-			array($this, '_doHeaders_callback_setext'), $text);
-
-		# atx-style headers:
-		#	# Header 1
-		#	## Header 2
-		#	## Header 2 with closing hashes ##
-		#	...
-		#	###### Header 6
-		#
-		$text = preg_replace_callback('{
-				^(\#{1,6})	# $1 = string of #\'s
-				[ ]*
-				(.+?)		# $2 = Header text
-				[ ]*
-				\#*			# optional closing #\'s (not counted)
-				\n+
-			}xm',
-			array($this, '_doHeaders_callback_atx'), $text);
-
-		return $text;
-	}
-	protected function _doHeaders_callback_setext($matches) {
-		# Terrible hack to check we haven't found an empty list item.
-		if ($matches[2] == '-' && preg_match('{^-(?: |$)}', $matches[1]))
-			return $matches[0];
-		
-		$level = $matches[2]{0} == '=' ? 1 : 2;
-		$block = "<h$level>".$this->runSpanGamut($matches[1])."</h$level>";
-		return "\n" . $this->hashBlock($block) . "\n\n";
-	}
-	protected function _doHeaders_callback_atx($matches) {
-		$level = strlen($matches[1]);
-		$block = "<h$level>".$this->runSpanGamut($matches[2])."</h$level>";
-		return "\n" . $this->hashBlock($block) . "\n\n";
-	}
-
-
-	protected function doLists($text) {
-	#
-	# Form HTML ordered (numbered) and unordered (bulleted) lists.
-	#
-		$less_than_tab = $this->tab_width - 1;
-
-		# Re-usable patterns to match list item bullets and number markers:
-		$marker_ul_re  = '[*+-]';
-		$marker_ol_re  = '\d+[\.]';
-
-		$markers_relist = array(
-			$marker_ul_re => $marker_ol_re,
-			$marker_ol_re => $marker_ul_re,
-			);
-
-		foreach ($markers_relist as $marker_re => $other_marker_re) {
-			# Re-usable pattern to match any entirel ul or ol list:
-			$whole_list_re = '
-				(								# $1 = whole list
-				  (								# $2
-					([ ]{0,'.$less_than_tab.'})	# $3 = number of spaces
-					('.$marker_re.')			# $4 = first list item marker
-					[ ]+
-				  )
-				  (?s:.+?)
-				  (								# $5
-					  \z
-					|
-					  \n{2,}
-					  (?=\S)
-					  (?!						# Negative lookahead for another list item marker
-						[ ]*
-						'.$marker_re.'[ ]+
-					  )
-					|
-					  (?=						# Lookahead for another kind of list
-					    \n
-						\3						# Must have the same indentation
-						'.$other_marker_re.'[ ]+
-					  )
-				  )
-				)
-			'; // mx
-			
-			# We use a different prefix before nested lists than top-level lists.
-			# See extended comment in _ProcessListItems().
-		
-			if ($this->list_level) {
-				$text = preg_replace_callback('{
-						^
-						'.$whole_list_re.'
-					}mx',
-					array($this, '_doLists_callback'), $text);
-			}
-			else {
-				$text = preg_replace_callback('{
-						(?:(?<=\n)\n|\A\n?) # Must eat the newline
-						'.$whole_list_re.'
-					}mx',
-					array($this, '_doLists_callback'), $text);
-			}
-		}
-
-		return $text;
-	}
-	protected function _doLists_callback($matches) {
-		# Re-usable patterns to match list item bullets and number markers:
-		$marker_ul_re  = '[*+-]';
-		$marker_ol_re  = '\d+[\.]';
-		$marker_any_re = "(?:$marker_ul_re|$marker_ol_re)";
-		
-		$list = $matches[1];
-		$list_type = preg_match("/$marker_ul_re/", $matches[4]) ? "ul" : "ol";
-		
-		$marker_any_re = ( $list_type == "ul" ? $marker_ul_re : $marker_ol_re );
-		
-		$list .= "\n";
-		$result = $this->processListItems($list, $marker_any_re);
-		
-		$result = $this->hashBlock("<$list_type>\n" . $result . "</$list_type>");
-		return "\n". $result ."\n\n";
-	}
-
-	protected $list_level = 0;
-
-	protected function processListItems($list_str, $marker_any_re) {
-	#
-	#	Process the contents of a single ordered or unordered list, splitting it
-	#	into individual list items.
-	#
-		# The $this->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.".
-		
-		$this->list_level++;
-
-		# trim trailing blank lines:
-		$list_str = preg_replace("/\n{2,}\\z/", "\n", $list_str);
-
-		$list_str = preg_replace_callback('{
-			(\n)?							# leading line = $1
-			(^[ ]*)							# leading whitespace = $2
-			('.$marker_any_re.'				# list marker and space = $3
-				(?:[ ]+|(?=\n))	# space only required if item is not empty
-			)
-			((?s:.*?))						# list item text   = $4
-			(?:(\n+(?=\n))|\n)				# tailing blank line = $5
-			(?= \n* (\z | \2 ('.$marker_any_re.') (?:[ ]+|(?=\n))))
-			}xm',
-			array($this, '_processListItems_callback'), $list_str);
-
-		$this->list_level--;
-		return $list_str;
-	}
-	protected function _processListItems_callback($matches) {
-		$item = $matches[4];
-		$leading_line =& $matches[1];
-		$leading_space =& $matches[2];
-		$marker_space = $matches[3];
-		$tailing_blank_line =& $matches[5];
-
-		if ($leading_line || $tailing_blank_line || 
-			preg_match('/\n{2,}/', $item))
-		{
-			# Replace marker with the appropriate whitespace indentation
-			$item = $leading_space . str_repeat(' ', strlen($marker_space)) . $item;
-			$item = $this->runBlockGamut($this->outdent($item)."\n");
-		}
-		else {
-			# Recursion for sub-lists:
-			$item = $this->doLists($this->outdent($item));
-			$item = preg_replace('/\n+$/', '', $item);
-			$item = $this->runSpanGamut($item);
-		}
-
-		return "<li>" . $item . "</li>\n";
-	}
-
-
-	protected function doCodeBlocks($text) {
-	#
-	#	Process Markdown `<pre><code>` blocks.
-	#
-		$text = preg_replace_callback('{
-				(?:\n\n|\A\n?)
-				(	            # $1 = the code block -- one or more lines, starting with a space/tab
-				  (?>
-					[ ]{'.$this->tab_width.'}  # Lines must start with a tab or a tab-width of spaces
-					.*\n+
-				  )+
-				)
-				((?=^[ ]{0,'.$this->tab_width.'}\S)|\Z)	# Lookahead for non-space at line-start, or end of doc
-			}xm',
-			array($this, '_doCodeBlocks_callback'), $text);
-
-		return $text;
-	}
-	protected function _doCodeBlocks_callback($matches) {
-		$codeblock = $matches[1];
-
-		$codeblock = $this->outdent($codeblock);
-		$codeblock = htmlspecialchars($codeblock, ENT_NOQUOTES);
-
-		# trim leading newlines and trailing newlines
-		$codeblock = preg_replace('/\A\n+|\n+\z/', '', $codeblock);
-
-		$codeblock = "<pre><code>$codeblock\n</code></pre>";
-		return "\n\n".$this->hashBlock($codeblock)."\n\n";
-	}
-
-
-	protected function makeCodeSpan($code) {
-	#
-	# Create a code span markup for $code. Called from handleSpanToken.
-	#
-		$code = htmlspecialchars(trim($code), ENT_NOQUOTES);
-		return $this->hashPart("<code>$code</code>");
-	}
-
-
-	protected $em_relist = array(
-		''  => '(?:(?<!\*)\*(?!\*)|(?<!_)_(?!_))(?![\.,:;]?\s)',
-		'*' => '(?<![\s*])\*(?!\*)',
-		'_' => '(?<![\s_])_(?!_)',
-		);
-	protected $strong_relist = array(
-		''   => '(?:(?<!\*)\*\*(?!\*)|(?<!_)__(?!_))(?![\.,:;]?\s)',
-		'**' => '(?<![\s*])\*\*(?!\*)',
-		'__' => '(?<![\s_])__(?!_)',
-		);
-	protected $em_strong_relist = array(
-		''    => '(?:(?<!\*)\*\*\*(?!\*)|(?<!_)___(?!_))(?![\.,:;]?\s)',
-		'***' => '(?<![\s*])\*\*\*(?!\*)',
-		'___' => '(?<![\s_])___(?!_)',
-		);
-	protected $em_strong_prepared_relist;
-	
-	protected function prepareItalicsAndBold() {
-	#
-	# Prepare regular expressions for searching emphasis tokens in any
-	# context.
-	#
-		foreach ($this->em_relist as $em => $em_re) {
-			foreach ($this->strong_relist as $strong => $strong_re) {
-				# Construct list of allowed token expressions.
-				$token_relist = array();
-				if (isset($this->em_strong_relist["$em$strong"])) {
-					$token_relist[] = $this->em_strong_relist["$em$strong"];
-				}
-				$token_relist[] = $em_re;
-				$token_relist[] = $strong_re;
-				
-				# Construct master expression from list.
-				$token_re = '{('. implode('|', $token_relist) .')}';
-				$this->em_strong_prepared_relist["$em$strong"] = $token_re;
-			}
-		}
-	}
-	
-	protected function doItalicsAndBold($text) {
-		$token_stack = array('');
-		$text_stack = array('');
-		$em = '';
-		$strong = '';
-		$tree_char_em = false;
-		
-		while (1) {
-			#
-			# Get prepared regular expression for seraching emphasis tokens
-			# in current context.
-			#
-			$token_re = $this->em_strong_prepared_relist["$em$strong"];
-			
-			#
-			# Each loop iteration search for the next emphasis token. 
-			# Each token is then passed to handleSpanToken.
-			#
-			$parts = preg_split($token_re, $text, 2, PREG_SPLIT_DELIM_CAPTURE);
-			$text_stack[0] .= $parts[0];
-			$token =& $parts[1];
-			$text =& $parts[2];
-			
-			if (empty($token)) {
-				# Reached end of text span: empty stack without emitting.
-				# any more emphasis.
-				while ($token_stack[0]) {
-					$text_stack[1] .= array_shift($token_stack);
-					$text_stack[0] .= array_shift($text_stack);
-				}
-				break;
-			}
-			
-			$token_len = strlen($token);
-			if ($tree_char_em) {
-				# Reached closing marker while inside a three-char emphasis.
-				if ($token_len == 3) {
-					# Three-char closing marker, close em and strong.
-					array_shift($token_stack);
-					$span = array_shift($text_stack);
-					$span = $this->runSpanGamut($span);
-					$span = "<strong><em>$span</em></strong>";
-					$text_stack[0] .= $this->hashPart($span);
-					$em = '';
-					$strong = '';
-				} else {
-					# Other closing marker: close one em or strong and
-					# change current token state to match the other
-					$token_stack[0] = str_repeat($token{0}, 3-$token_len);
-					$tag = $token_len == 2 ? "strong" : "em";
-					$span = $text_stack[0];
-					$span = $this->runSpanGamut($span);
-					$span = "<$tag>$span</$tag>";
-					$text_stack[0] = $this->hashPart($span);
-					$$tag = ''; # $$tag stands for $em or $strong
-				}
-				$tree_char_em = false;
-			} else if ($token_len == 3) {
-				if ($em) {
-					# Reached closing marker for both em and strong.
-					# Closing strong marker:
-					for ($i = 0; $i < 2; ++$i) {
-						$shifted_token = array_shift($token_stack);
-						$tag = strlen($shifted_token) == 2 ? "strong" : "em";
-						$span = array_shift($text_stack);
-						$span = $this->runSpanGamut($span);
-						$span = "<$tag>$span</$tag>";
-						$text_stack[0] .= $this->hashPart($span);
-						$$tag = ''; # $$tag stands for $em or $strong
-					}
-				} else {
-					# Reached opening three-char emphasis marker. Push on token 
-					# stack; will be handled by the special condition above.
-					$em = $token{0};
-					$strong = "$em$em";
-					array_unshift($token_stack, $token);
-					array_unshift($text_stack, '');
-					$tree_char_em = true;
-				}
-			} else if ($token_len == 2) {
-				if ($strong) {
-					# Unwind any dangling emphasis marker:
-					if (strlen($token_stack[0]) == 1) {
-						$text_stack[1] .= array_shift($token_stack);
-						$text_stack[0] .= array_shift($text_stack);
-					}
-					# Closing strong marker:
-					array_shift($token_stack);
-					$span = array_shift($text_stack);
-					$span = $this->runSpanGamut($span);
-					$span = "<strong>$span</strong>";
-					$text_stack[0] .= $this->hashPart($span);
-					$strong = '';
-				} else {
-					array_unshift($token_stack, $token);
-					array_unshift($text_stack, '');
-					$strong = $token;
-				}
-			} else {
-				# Here $token_len == 1
-				if ($em) {
-					if (strlen($token_stack[0]) == 1) {
-						# Closing emphasis marker:
-						array_shift($token_stack);
-						$span = array_shift($text_stack);
-						$span = $this->runSpanGamut($span);
-						$span = "<em>$span</em>";
-						$text_stack[0] .= $this->hashPart($span);
-						$em = '';
-					} else {
-						$text_stack[0] .= $token;
-					}
-				} else {
-					array_unshift($token_stack, $token);
-					array_unshift($text_stack, '');
-					$em = $token;
-				}
-			}
-		}
-		return $text_stack[0];
-	}
-
-
-	protected function doBlockQuotes($text) {
-		$text = preg_replace_callback('/
-			  (								# Wrap whole match in $1
-				(?>
-				  ^[ ]*>[ ]?			# ">" at the start of a line
-					.+\n					# rest of the first line
-				  (.+\n)*					# subsequent consecutive lines
-				  \n*						# blanks
-				)+
-			  )
-			/xm',
-			array($this, '_doBlockQuotes_callback'), $text);
-
-		return $text;
-	}
-	protected function _doBlockQuotes_callback($matches) {
-		$bq = $matches[1];
-		# trim one level of quoting - trim whitespace-only lines
-		$bq = preg_replace('/^[ ]*>[ ]?|^[ ]+$/m', '', $bq);
-		$bq = $this->runBlockGamut($bq);		# recurse
-
-		$bq = preg_replace('/^/m', "  ", $bq);
-		# These leading spaces cause problem with <pre> content, 
-		# so we need to fix that:
-		$bq = preg_replace_callback('{(\s*<pre>.+?</pre>)}sx', 
-			array($this, '_doBlockQuotes_callback2'), $bq);
-
-		return "\n". $this->hashBlock("<blockquote>\n$bq\n</blockquote>")."\n\n";
-	}
-	protected function _doBlockQuotes_callback2($matches) {
-		$pre = $matches[1];
-		$pre = preg_replace('/^  /m', '', $pre);
-		return $pre;
-	}
-
-
-	protected function formParagraphs($text) {
-	#
-	#	Params:
-	#		$text - string to process with html <p> tags
-	#
-		# Strip leading and trailing lines:
-		$text = preg_replace('/\A\n+|\n+\z/', '', $text);
-
-		$grafs = preg_split('/\n{2,}/', $text, -1, PREG_SPLIT_NO_EMPTY);
-
-		#
-		# Wrap <p> tags and unhashify HTML blocks
-		#
-		foreach ($grafs as $key => $value) {
-			if (!preg_match('/^B\x1A[0-9]+B$/', $value)) {
-				# Is a paragraph.
-				$value = $this->runSpanGamut($value);
-				$value = preg_replace('/^([ ]*)/', "<p>", $value);
-				$value .= "</p>";
-				$grafs[$key] = $this->unhash($value);
-			}
-			else {
-				# Is a block.
-				# Modify elements of @grafs in-place...
-				$graf = $value;
-				$block = $this->html_hashes[$graf];
-				$graf = $block;
-//				if (preg_match('{
-//					\A
-//					(							# $1 = <div> tag
-//					  <div  \s+
-//					  [^>]*
-//					  \b
-//					  markdown\s*=\s*  ([\'"])	#	$2 = attr quote char
-//					  1
-//					  \2
-//					  [^>]*
-//					  >
-//					)
-//					(							# $3 = contents
-//					.*
-//					)
-//					(</div>)					# $4 = closing tag
-//					\z
-//					}xs', $block, $matches))
-//				{
-//					list(, $div_open, , $div_content, $div_close) = $matches;
-//
-//					# We can't call Markdown(), because that resets the hash;
-//					# that initialization code should be pulled into its own sub, though.
-//					$div_content = $this->hashHTMLBlocks($div_content);
-//					
-//					# Run document gamut methods on the content.
-//					foreach ($this->document_gamut as $method => $priority) {
-//						$div_content = $this->$method($div_content);
-//					}
-//
-//					$div_open = preg_replace(
-//						'{\smarkdown\s*=\s*([\'"]).+?\1}', '', $div_open);
-//
-//					$graf = $div_open . "\n" . $div_content . "\n" . $div_close;
-//				}
-				$grafs[$key] = $graf;
-			}
-		}
-
-		return implode("\n\n", $grafs);
-	}
-
-
-	protected function encodeAttribute($text) {
-	#
-	# Encode text for a double-quoted HTML attribute. This function
-	# is *not* suitable for attributes enclosed in single quotes.
-	#
-		$text = $this->encodeAmpsAndAngles($text);
-		$text = str_replace('"', '&quot;', $text);
-		return $text;
-	}
-
-
-	protected function encodeURLAttribute($url, &$text = null) {
-	#
-	# Encode text for a double-quoted HTML attribute containing a URL,
-	# applying the URL filter if set. Also generates the textual
-	# representation for the URL (removing mailto: or tel:) storing it in $text.
-	# This function is *not* suitable for attributes enclosed in single quotes.
-	#
-		if ($this->url_filter_func)
-			$url = call_user_func($this->url_filter_func, $url);
-
-		if (preg_match('{^mailto:}i', $url))
-			$url = $this->encodeEntityObfuscatedAttribute($url, $text, 7);
-		else if (preg_match('{^tel:}i', $url))
-		{
-			$url = $this->encodeAttribute($url);
-			$text = substr($url, 4);
-		}
-		else
-		{
-			$url = $this->encodeAttribute($url);
-			$text = $url;
-		}
-
-		return $url;
-	}
-	
-	
-	protected function encodeAmpsAndAngles($text) {
-	#
-	# Smart processing for ampersands and angle brackets that need to 
-	# be encoded. Valid character entities are left alone unless the
-	# no-entities mode is set.
-	#
-		if ($this->no_entities) {
-			$text = str_replace('&', '&amp;', $text);
-		} else {
-			# Ampersand-encoding based entirely on Nat Irons's Amputator
-			# MT plugin: <http://bumppo.net/projects/amputator/>
-			$text = preg_replace('/&(?!#?[xX]?(?:[0-9a-fA-F]+|\w+);)/', 
-								'&amp;', $text);
-		}
-		# Encode remaining <'s
-		$text = str_replace('<', '&lt;', $text);
-
-		return $text;
-	}
-
-
-	protected function doAutoLinks($text) {
-		$text = preg_replace_callback('{<((https?|ftp|dict|tel):[^\'">\s]+)>}i',
-			array($this, '_doAutoLinks_url_callback'), $text);
-
-		# Email addresses: <address@domain.foo>
-		$text = preg_replace_callback('{
-			<
-			(?:mailto:)?
-			(
-				(?:
-					[-!#$%&\'*+/=?^_`.{|}~\w\x80-\xFF]+
-				|
-					".*?"
-				)
-				\@
-				(?:
-					[-a-z0-9\x80-\xFF]+(\.[-a-z0-9\x80-\xFF]+)*\.[a-z]+
-				|
-					\[[\d.a-fA-F:]+\]	# IPv4 & IPv6
-				)
-			)
-			>
-			}xi',
-			array($this, '_doAutoLinks_email_callback'), $text);
-
-		return $text;
-	}
-	protected function _doAutoLinks_url_callback($matches) {
-		$url = $this->encodeURLAttribute($matches[1], $text);
-		$link = "<a href=\"$url\">$text</a>";
-		return $this->hashPart($link);
-	}
-	protected function _doAutoLinks_email_callback($matches) {
-		$addr = $matches[1];
-		$url = $this->encodeURLAttribute("mailto:$addr", $text);
-		$link = "<a href=\"$url\">$text</a>";
-		return $this->hashPart($link);
-	}
-
-
-	protected function encodeEntityObfuscatedAttribute($text, &$tail = null, $head_length = 0) {
-	#
-	#	Input: some text to obfuscate, e.g. "mailto:foo@example.com"
-	#
-	#	Output: the same text but with most characters encoded as either a
-	#		decimal or hex entity, in the hopes of foiling most address
-	#		harvesting spam bots. E.g.:
-	#
-	#        &#109;&#x61;&#105;&#x6c;&#116;&#x6f;&#58;&#x66;o&#111;
-	#        &#x40;&#101;&#x78;&#97;&#x6d;&#112;&#x6c;&#101;&#46;&#x63;&#111;
-	#        &#x6d;
-	#
-	#	Note: the additional output $tail is assigned the same value as the
-	#	ouput, minus the number of characters specified by $head_length.
-	#
-	#	Based by a filter by Matthew Wickline, posted to BBEdit-Talk.
-	#   With some optimizations by Milian Wolff. Forced encoding of HTML
-	#	attribute special characters by Allan Odgaard.
-	#
-		if ($text == "") return $tail = "";
-
-		$chars = preg_split('/(?<!^)(?!$)/', $text);
-		$seed = (int)abs(crc32($text) / strlen($text)); # Deterministic seed.
-
-		foreach ($chars as $key => $char) {
-			$ord = ord($char);
-			# Ignore non-ascii chars.
-			if ($ord < 128) {
-				$r = ($seed * (1 + $key)) % 100; # Pseudo-random function.
-				# roughly 10% raw, 45% hex, 45% dec
-				# '@' *must* be encoded. I insist.
-				# '"' and '>' have to be encoded inside the attribute
-				if ($r > 90 && strpos('@"&>', $char) === false) /* do nothing */;
-				else if ($r < 45) $chars[$key] = '&#x'.dechex($ord).';';
-				else              $chars[$key] = '&#'.$ord.';';
-			}
-		}
-
-		$text = implode('', $chars);
-		$tail = $head_length ? implode('', array_slice($chars, $head_length)) : $text;
-
-		return $text;
-	}
-
-
-	protected function parseSpan($str) {
-	#
-	# Take the string $str and parse it into tokens, hashing embeded HTML,
-	# escaped characters and handling code spans.
-	#
-		$output = '';
-		
-		$span_re = '{
-				(
-					\\\\'.$this->escape_chars_re.'
-				|
-					(?<![`\\\\])
-					`+						# code span marker
-			'.( $this->no_markup ? '' : '
-				|
-					<!--    .*?     -->		# comment
-				|
-					<\?.*?\?> | <%.*?%>		# processing instruction
-				|
-					<[!$]?[-a-zA-Z0-9:_]+	# regular tags
-					(?>
-						\s
-						(?>[^"\'>]+|"[^"]*"|\'[^\']*\')*
-					)?
-					>
-				|
-					<[-a-zA-Z0-9:_]+\s*/> # xml-style empty tag
-				|
-					</[-a-zA-Z0-9:_]+\s*> # closing tag
-			').'
-				)
-				}xs';
-
-		while (1) {
-			#
-			# Each loop iteration seach for either the next tag, the next 
-			# openning code span marker, or the next escaped character. 
-			# Each token is then passed to handleSpanToken.
-			#
-			$parts = preg_split($span_re, $str, 2, PREG_SPLIT_DELIM_CAPTURE);
-			
-			# Create token from text preceding tag.
-			if ($parts[0] != "") {
-				$output .= $parts[0];
-			}
-			
-			# Check if we reach the end.
-			if (isset($parts[1])) {
-				$output .= $this->handleSpanToken($parts[1], $parts[2]);
-				$str = $parts[2];
-			}
-			else {
-				break;
-			}
-		}
-		
-		return $output;
-	}
-	
-	
-	protected function handleSpanToken($token, &$str) {
-	#
-	# Handle $token provided by parseSpan by determining its nature and 
-	# returning the corresponding value that should replace it.
-	#
-		switch ($token{0}) {
-			case "\\":
-				return $this->hashPart("&#". ord($token{1}). ";");
-			case "`":
-				# Search for end marker in remaining text.
-				if (preg_match('/^(.*?[^`])'.preg_quote($token).'(?!`)(.*)$/sm', 
-					$str, $matches))
-				{
-					$str = $matches[2];
-					$codespan = $this->makeCodeSpan($matches[1]);
-					return $this->hashPart($codespan);
-				}
-				return $token; // return as text since no ending marker found.
-			default:
-				return $this->hashPart($token);
-		}
-	}
-
-
-	protected function outdent($text) {
-	#
-	# Remove one level of line-leading tabs or spaces
-	#
-		return preg_replace('/^(\t|[ ]{1,'.$this->tab_width.'})/m', '', $text);
-	}
-
-
-	# String length function for detab. `_initDetab` will create a function to 
-	# hanlde UTF-8 if the default function does not exist.
-	protected $utf8_strlen = 'mb_strlen';
-	
-	protected function detab($text) {
-	#
-	# Replace tabs with the appropriate amount of space.
-	#
-		# For each line we separate the line in blocks delemited by
-		# tab characters. Then we reconstruct every line by adding the 
-		# appropriate number of space between each blocks.
-		
-		$text = preg_replace_callback('/^.*\t.*$/m',
-			array($this, '_detab_callback'), $text);
-
-		return $text;
-	}
-	protected function _detab_callback($matches) {
-		$line = $matches[0];
-		$strlen = $this->utf8_strlen; # strlen function for UTF-8.
-		
-		# Split in blocks.
-		$blocks = explode("\t", $line);
-		# Add each blocks to the line.
-		$line = $blocks[0];
-		unset($blocks[0]); # Do not add first block twice.
-		foreach ($blocks as $block) {
-			# Calculate amount of space, insert spaces, insert block.
-			$amount = $this->tab_width - 
-				$strlen($line, 'UTF-8') % $this->tab_width;
-			$line .= str_repeat(" ", $amount) . $block;
-		}
-		return $line;
-	}
-	protected function _initDetab() {
-	#
-	# Check for the availability of the function in the `utf8_strlen` property
-	# (initially `mb_strlen`). If the function is not available, create a 
-	# function that will loosely count the number of UTF-8 characters with a
-	# regular expression.
-	#
-		if (function_exists($this->utf8_strlen)) return;
-		$this->utf8_strlen = create_function('$text', 'return preg_match_all(
-			"/[\\\\x00-\\\\xBF]|[\\\\xC0-\\\\xFF][\\\\x80-\\\\xBF]*/", 
-			$text, $m);');
-	}
-
-
-	protected function unhash($text) {
-	#
-	# Swap back in all the tags hashed by _HashHTMLBlocks.
-	#
-		return preg_replace_callback('/(.)\x1A[0-9]+\1/', 
-			array($this, '_unhash_callback'), $text);
-	}
-	protected function _unhash_callback($matches) {
-		return $this->html_hashes[$matches[0]];
-	}
-
-}
-
-
-#
-# Temporary Markdown Extra Parser Implementation Class
-#
-# NOTE: DON'T USE THIS CLASS
-# Currently the implementation of of Extra resides here in this temporary class.
-# This makes it easier to propagate the changes between the three different
-# packaging styles of PHP Markdown. When this issue is resolved, this
-# MarkdownExtra_TmpImpl class here will disappear and \Michelf\MarkdownExtra
-# will contain the code. So please use \Michelf\MarkdownExtra and ignore this
-# one.
-#
-
-abstract class _MarkdownExtra_TmpImpl extends \Michelf\Markdown {
-
-	### Configuration Variables ###
-
-	# Prefix for footnote ids.
-	public $fn_id_prefix = "";
-	
-	# Optional title attribute for footnote links and backlinks.
-	public $fn_link_title = "";
-	public $fn_backlink_title = "";
-	
-	# Optional class attribute for footnote links and backlinks.
-	public $fn_link_class = "footnote-ref";
-	public $fn_backlink_class = "footnote-backref";
-
-	# Class name for table cell alignment (%% replaced left/center/right)
-	# For instance: 'go-%%' becomes 'go-left' or 'go-right' or 'go-center'
-	# If empty, the align attribute is used instead of a class name.
-	public $table_align_class_tmpl = '';
-
-	# Optional class prefix for fenced code block.
-	public $code_class_prefix = "";
-	# Class attribute for code blocks goes on the `code` tag;
-	# setting this to true will put attributes on the `pre` tag instead.
-	public $code_attr_on_pre = false;
-	
-	# Predefined abbreviations.
-	public $predef_abbr = array();
-
-
-	### Parser Implementation ###
-
-	public function __construct() {
-	#
-	# Constructor function. Initialize the parser object.
-	#
-		# Add extra escapable characters before parent constructor 
-		# initialize the table.
-		$this->escape_chars .= ':|';
-		
-		# Insert extra document, block, and span transformations. 
-		# Parent constructor will do the sorting.
-		$this->document_gamut += array(
-			"doFencedCodeBlocks" => 5,
-			"stripFootnotes"     => 15,
-			"stripAbbreviations" => 25,
-			"appendFootnotes"    => 50,
-			);
-		$this->block_gamut += array(
-			"doFencedCodeBlocks" => 5,
-			"doTables"           => 15,
-			"doDefLists"         => 45,
-			);
-		$this->span_gamut += array(
-			"doFootnotes"        => 5,
-			"doAbbreviations"    => 70,
-			);
-		
-		parent::__construct();
-	}
-	
-	
-	# Extra variables used during extra transformations.
-	protected $footnotes = array();
-	protected $footnotes_ordered = array();
-	protected $footnotes_ref_count = array();
-	protected $footnotes_numbers = array();
-	protected $abbr_desciptions = array();
-	protected $abbr_word_re = '';
-	
-	# Give the current footnote number.
-	protected $footnote_counter = 1;
-	
-	
-	protected function setup() {
-	#
-	# Setting up Extra-specific variables.
-	#
-		parent::setup();
-		
-		$this->footnotes = array();
-		$this->footnotes_ordered = array();
-		$this->footnotes_ref_count = array();
-		$this->footnotes_numbers = array();
-		$this->abbr_desciptions = array();
-		$this->abbr_word_re = '';
-		$this->footnote_counter = 1;
-		
-		foreach ($this->predef_abbr as $abbr_word => $abbr_desc) {
-			if ($this->abbr_word_re)
-				$this->abbr_word_re .= '|';
-			$this->abbr_word_re .= preg_quote($abbr_word);
-			$this->abbr_desciptions[$abbr_word] = trim($abbr_desc);
-		}
-	}
-	
-	protected function teardown() {
-	#
-	# Clearing Extra-specific variables.
-	#
-		$this->footnotes = array();
-		$this->footnotes_ordered = array();
-		$this->footnotes_ref_count = array();
-		$this->footnotes_numbers = array();
-		$this->abbr_desciptions = array();
-		$this->abbr_word_re = '';
-		
-		parent::teardown();
-	}
-	
-	
-	### Extra Attribute Parser ###
-
-	# Expression to use to catch attributes (includes the braces)
-	protected $id_class_attr_catch_re = '\{((?:[ ]*[#.][-_:a-zA-Z0-9]+){1,})[ ]*\}';
-	# Expression to use when parsing in a context when no capture is desired
-	protected $id_class_attr_nocatch_re = '\{(?:[ ]*[#.][-_:a-zA-Z0-9]+){1,}[ ]*\}';
-
-	protected function doExtraAttributes($tag_name, $attr) {
-	#
-	# Parse attributes caught by the $this->id_class_attr_catch_re expression
-	# and return the HTML-formatted list of attributes.
-	#
-	# Currently supported attributes are .class and #id.
-	#
-		if (empty($attr)) return "";
-		
-		# Split on components
-		preg_match_all('/[#.][-_:a-zA-Z0-9]+/', $attr, $matches);
-		$elements = $matches[0];
-
-		# handle classes and ids (only first id taken into account)
-		$classes = array();
-		$id = false;
-		foreach ($elements as $element) {
-			if ($element{0} == '.') {
-				$classes[] = substr($element, 1);
-			} else if ($element{0} == '#') {
-				if ($id === false) $id = substr($element, 1);
-			}
-		}
-
-		# compose attributes as string
-		$attr_str = "";
-		if (!empty($id)) {
-			$attr_str .= ' id="'.$id.'"';
-		}
-		if (!empty($classes)) {
-			$attr_str .= ' class="'.implode(" ", $classes).'"';
-		}
-		return $attr_str;
-	}
-
-
-	protected function stripLinkDefinitions($text) {
-	#
-	# Strips link definitions from text, stores the URLs and titles in
-	# hash references.
-	#
-		$less_than_tab = $this->tab_width - 1;
-
-		# Link defs are in the form: ^[id]: url "optional title"
-		$text = preg_replace_callback('{
-							^[ ]{0,'.$less_than_tab.'}\[(.+)\][ ]?:	# id = $1
-							  [ ]*
-							  \n?				# maybe *one* newline
-							  [ ]*
-							(?:
-							  <(.+?)>			# url = $2
-							|
-							  (\S+?)			# url = $3
-							)
-							  [ ]*
-							  \n?				# maybe one newline
-							  [ ]*
-							(?:
-								(?<=\s)			# lookbehind for whitespace
-								["(]
-								(.*?)			# title = $4
-								[")]
-								[ ]*
-							)?	# title is optional
-					(?:[ ]* '.$this->id_class_attr_catch_re.' )?  # $5 = extra id & class attr
-							(?:\n+|\Z)
-			}xm',
-			array($this, '_stripLinkDefinitions_callback'),
-			$text);
-		return $text;
-	}
-	protected function _stripLinkDefinitions_callback($matches) {
-		$link_id = strtolower($matches[1]);
-		$url = $matches[2] == '' ? $matches[3] : $matches[2];
-		$this->urls[$link_id] = $url;
-		$this->titles[$link_id] =& $matches[4];
-		$this->ref_attr[$link_id] = $this->doExtraAttributes("", $dummy =& $matches[5]);
-		return ''; # String that will replace the block
-	}
-
-
-	### HTML Block Parser ###
-	
-	# Tags that are always treated as block tags:
-	protected $block_tags_re = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|address|form|fieldset|iframe|hr|legend|article|section|nav|aside|hgroup|header|footer|figcaption|figure';
-						   
-	# Tags treated as block tags only if the opening tag is alone on its line:
-	protected $context_block_tags_re = 'script|noscript|style|ins|del|iframe|object|source|track|param|math|svg|canvas|audio|video';
-	
-	# Tags where markdown="1" default to span mode:
-	protected $contain_span_tags_re = 'p|h[1-6]|li|dd|dt|td|th|legend|address';
-	
-	# Tags which must not have their contents modified, no matter where 
-	# they appear:
-	protected $clean_tags_re = 'script|style|math|svg';
-	
-	# Tags that do not need to be closed.
-	protected $auto_close_tags_re = 'hr|img|param|source|track';
-	
-
-	protected function hashHTMLBlocks($text) {
-	#
-	# Hashify HTML Blocks and "clean tags".
-	#
-	# 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.
-	#
-	# This works by calling _HashHTMLBlocks_InMarkdown, which then calls
-	# _HashHTMLBlocks_InHTML when it encounter block tags. When the markdown="1" 
-	# attribute is found within a tag, _HashHTMLBlocks_InHTML calls back
-	#  _HashHTMLBlocks_InMarkdown to handle the Markdown syntax within the tag.
-	# These two functions are calling each other. It's recursive!
-	#
-		if ($this->no_markup)  return $text;
-
-		#
-		# Call the HTML-in-Markdown hasher.
-		#
-		list($text, ) = $this->_hashHTMLBlocks_inMarkdown($text);
-		
-		return $text;
-	}
-	protected function _hashHTMLBlocks_inMarkdown($text, $indent = 0,
-										$enclosing_tag_re = '', $span = false)
-	{
-	#
-	# Parse markdown text, calling _HashHTMLBlocks_InHTML for block tags.
-	#
-	# *   $indent is the number of space to be ignored when checking for code 
-	#     blocks. This is important because if we don't take the indent into 
-	#     account, something like this (which looks right) won't work as expected:
-	#
-	#     <div>
-	#         <div markdown="1">
-	#         Hello World.  <-- Is this a Markdown code block or text?
-	#         </div>  <-- Is this a Markdown code block or a real tag?
-	#     <div>
-	#
-	#     If you don't like this, just don't indent the tag on which
-	#     you apply the markdown="1" attribute.
-	#
-	# *   If $enclosing_tag_re is not empty, stops at the first unmatched closing 
-	#     tag with that name. Nested tags supported.
-	#
-	# *   If $span is true, text inside must treated as span. So any double 
-	#     newline will be replaced by a single newline so that it does not create 
-	#     paragraphs.
-	#
-	# Returns an array of that form: ( processed text , remaining text )
-	#
-		if ($text === '') return array('', '');
-
-		# Regex to check for the presense of newlines around a block tag.
-		$newline_before_re = '/(?:^\n?|\n\n)*$/';
-		$newline_after_re = 
-			'{
-				^						# Start of text following the tag.
-				(?>[ ]*<!--.*?-->)?		# Optional comment.
-				[ ]*\n					# Must be followed by newline.
-			}xs';
-		
-		# Regex to match any tag.
-		$block_tag_re =
-			'{
-				(					# $2: Capture whole tag.
-					</?					# Any opening or closing tag.
-						(?>				# Tag name.
-							'.$this->block_tags_re.'			|
-							'.$this->context_block_tags_re.'	|
-							'.$this->clean_tags_re.'        	|
-							(?!\s)'.$enclosing_tag_re.'
-						)
-						(?:
-							(?=[\s"\'/a-zA-Z0-9])	# Allowed characters after tag name.
-							(?>
-								".*?"		|	# Double quotes (can contain `>`)
-								\'.*?\'   	|	# Single quotes (can contain `>`)
-								.+?				# Anything but quotes and `>`.
-							)*?
-						)?
-					>					# End of tag.
-				|
-					<!--    .*?     -->	# HTML Comment
-				|
-					<\?.*?\?> | <%.*?%>	# Processing instruction
-				|
-					<!\[CDATA\[.*?\]\]>	# CData Block
-				'. ( !$span ? ' # If not in span.
-				|
-					# Indented code block
-					(?: ^[ ]*\n | ^ | \n[ ]*\n )
-					[ ]{'.($indent+4).'}[^\n]* \n
-					(?>
-						(?: [ ]{'.($indent+4).'}[^\n]* | [ ]* ) \n
-					)*
-				|
-					# Fenced code block marker
-					(?<= ^ | \n )
-					[ ]{0,'.($indent+3).'}(?:~{3,}|`{3,})
-									[ ]*
-					(?:
-					\.?[-_:a-zA-Z0-9]+ # standalone class name
-					|
-						'.$this->id_class_attr_nocatch_re.' # extra attributes
-					)?
-					[ ]*
-					(?= \n )
-				' : '' ). ' # End (if not is span).
-				|
-					# Code span marker
-					# Note, this regex needs to go after backtick fenced
-					# code blocks but it should also be kept outside of the
-					# "if not in span" condition adding backticks to the parser
-					`+
-				)
-			}xs';
-
-		
-		$depth = 0;		# Current depth inside the tag tree.
-		$parsed = "";	# Parsed text that will be returned.
-
-		#
-		# Loop through every tag until we find the closing tag of the parent
-		# or loop until reaching the end of text if no parent tag specified.
-		#
-		do {
-			#
-			# Split the text using the first $tag_match pattern found.
-			# Text before  pattern will be first in the array, text after
-			# pattern will be at the end, and between will be any catches made 
-			# by the pattern.
-			#
-			$parts = preg_split($block_tag_re, $text, 2, 
-								PREG_SPLIT_DELIM_CAPTURE);
-			
-			# If in Markdown span mode, add a empty-string span-level hash 
-			# after each newline to prevent triggering any block element.
-			if ($span) {
-				$void = $this->hashPart("", ':');
-				$newline = "$void\n";
-				$parts[0] = $void . str_replace("\n", $newline, $parts[0]) . $void;
-			}
-			
-			$parsed .= $parts[0]; # Text before current tag.
-			
-			# If end of $text has been reached. Stop loop.
-			if (count($parts) < 3) {
-				$text = "";
-				break;
-			}
-			
-			$tag  = $parts[1]; # Tag to handle.
-			$text = $parts[2]; # Remaining text after current tag.
-			$tag_re = preg_quote($tag); # For use in a regular expression.
-			
-			#
-			# Check for: Fenced code block marker.
-			# Note: need to recheck the whole tag to disambiguate backtick
-			# fences from code spans
-			#
-			if (preg_match('{^\n?([ ]{0,'.($indent+3).'})(~{3,}|`{3,})[ ]*(?:\.?[-_:a-zA-Z0-9]+|'.$this->id_class_attr_nocatch_re.')?[ ]*\n?$}', $tag, $capture)) {
-				# Fenced code block marker: find matching end marker.
-				$fence_indent = strlen($capture[1]); # use captured indent in re
-				$fence_re = $capture[2]; # use captured fence in re
-				if (preg_match('{^(?>.*\n)*?[ ]{'.($fence_indent).'}'.$fence_re.'[ ]*(?:\n|$)}', $text,
-					$matches)) 
-				{
-					# End marker found: pass text unchanged until marker.
-					$parsed .= $tag . $matches[0];
-					$text = substr($text, strlen($matches[0]));
-				}
-				else {
-					# No end marker: just skip it.
-					$parsed .= $tag;
-				}
-			}
-			#
-			# Check for: Indented code block.
-			#
-			else if ($tag{0} == "\n" || $tag{0} == " ") {
-				# Indented code block: pass it unchanged, will be handled 
-				# later.
-				$parsed .= $tag;
-			}
-			#
-			# Check for: Code span marker
-			# Note: need to check this after backtick fenced code blocks
-			#
-			else if ($tag{0} == "`") {
-				# Find corresponding end marker.
-				$tag_re = preg_quote($tag);
-				if (preg_match('{^(?>.+?|\n(?!\n))*?(?<!`)'.$tag_re.'(?!`)}',
-					$text, $matches))
-				{
-					# End marker found: pass text unchanged until marker.
-					$parsed .= $tag . $matches[0];
-					$text = substr($text, strlen($matches[0]));
-				}
-				else {
-					# Unmatched marker: just skip it.
-					$parsed .= $tag;
-				}
-			}
-			#
-			# Check for: Opening Block level tag or
-			#            Opening Context Block tag (like ins and del) 
-			#               used as a block tag (tag is alone on it's line).
-			#
-			else if (preg_match('{^<(?:'.$this->block_tags_re.')\b}', $tag) ||
-				(	preg_match('{^<(?:'.$this->context_block_tags_re.')\b}', $tag) &&
-					preg_match($newline_before_re, $parsed) &&
-					preg_match($newline_after_re, $text)	)
-				)
-			{
-				# Need to parse tag and following text using the HTML parser.
-				list($block_text, $text) = 
-					$this->_hashHTMLBlocks_inHTML($tag . $text, "hashBlock", true);
-				
-				# Make sure it stays outside of any paragraph by adding newlines.
-				$parsed .= "\n\n$block_text\n\n";
-			}
-			#
-			# Check for: Clean tag (like script, math)
-			#            HTML Comments, processing instructions.
-			#
-			else if (preg_match('{^<(?:'.$this->clean_tags_re.')\b}', $tag) ||
-				$tag{1} == '!' || $tag{1} == '?')
-			{
-				# Need to parse tag and following text using the HTML parser.
-				# (don't check for markdown attribute)
-				list($block_text, $text) = 
-					$this->_hashHTMLBlocks_inHTML($tag . $text, "hashClean", false);
-				
-				$parsed .= $block_text;
-			}
-			#
-			# Check for: Tag with same name as enclosing tag.
-			#
-			else if ($enclosing_tag_re !== '' &&
-				# Same name as enclosing tag.
-				preg_match('{^</?(?:'.$enclosing_tag_re.')\b}', $tag))
-			{
-				#
-				# Increase/decrease nested tag count.
-				#
-				if ($tag{1} == '/')						$depth--;
-				else if ($tag{strlen($tag)-2} != '/')	$depth++;
-
-				if ($depth < 0) {
-					#
-					# Going out of parent element. Clean up and break so we
-					# return to the calling function.
-					#
-					$text = $tag . $text;
-					break;
-				}
-				
-				$parsed .= $tag;
-			}
-			else {
-				$parsed .= $tag;
-			}
-		} while ($depth >= 0);
-		
-		return array($parsed, $text);
-	}
-	protected function _hashHTMLBlocks_inHTML($text, $hash_method, $md_attr) {
-	#
-	# Parse HTML, calling _HashHTMLBlocks_InMarkdown for block tags.
-	#
-	# *   Calls $hash_method to convert any blocks.
-	# *   Stops when the first opening tag closes.
-	# *   $md_attr indicate if the use of the `markdown="1"` attribute is allowed.
-	#     (it is not inside clean tags)
-	#
-	# Returns an array of that form: ( processed text , remaining text )
-	#
-		if ($text === '') return array('', '');
-		
-		# Regex to match `markdown` attribute inside of a tag.
-		$markdown_attr_re = '
-			{
-				\s*			# Eat whitespace before the `markdown` attribute
-				markdown
-				\s*=\s*
-				(?>
-					(["\'])		# $1: quote delimiter		
-					(.*?)		# $2: attribute value
-					\1			# matching delimiter	
-				|
-					([^\s>]*)	# $3: unquoted attribute value
-				)
-				()				# $4: make $3 always defined (avoid warnings)
-			}xs';
-		
-		# Regex to match any tag.
-		$tag_re = '{
-				(					# $2: Capture whole tag.
-					</?					# Any opening or closing tag.
-						[\w:$]+			# Tag name.
-						(?:
-							(?=[\s"\'/a-zA-Z0-9])	# Allowed characters after tag name.
-							(?>
-								".*?"		|	# Double quotes (can contain `>`)
-								\'.*?\'   	|	# Single quotes (can contain `>`)
-								.+?				# Anything but quotes and `>`.
-							)*?
-						)?
-					>					# End of tag.
-				|
-					<!--    .*?     -->	# HTML Comment
-				|
-					<\?.*?\?> | <%.*?%>	# Processing instruction
-				|
-					<!\[CDATA\[.*?\]\]>	# CData Block
-				)
-			}xs';
-		
-		$original_text = $text;		# Save original text in case of faliure.
-		
-		$depth		= 0;	# Current depth inside the tag tree.
-		$block_text	= "";	# Temporary text holder for current text.
-		$parsed		= "";	# Parsed text that will be returned.
-
-		#
-		# Get the name of the starting tag.
-		# (This pattern makes $base_tag_name_re safe without quoting.)
-		#
-		if (preg_match('/^<([\w:$]*)\b/', $text, $matches))
-			$base_tag_name_re = $matches[1];
-
-		#
-		# Loop through every tag until we find the corresponding closing tag.
-		#
-		do {
-			#
-			# Split the text using the first $tag_match pattern found.
-			# Text before  pattern will be first in the array, text after
-			# pattern will be at the end, and between will be any catches made 
-			# by the pattern.
-			#
-			$parts = preg_split($tag_re, $text, 2, PREG_SPLIT_DELIM_CAPTURE);
-			
-			if (count($parts) < 3) {
-				#
-				# End of $text reached with unbalenced tag(s).
-				# In that case, we return original text unchanged and pass the
-				# first character as filtered to prevent an infinite loop in the 
-				# parent function.
-				#
-				return array($original_text{0}, substr($original_text, 1));
-			}
-			
-			$block_text .= $parts[0]; # Text before current tag.
-			$tag         = $parts[1]; # Tag to handle.
-			$text        = $parts[2]; # Remaining text after current tag.
-			
-			#
-			# Check for: Auto-close tag (like <hr/>)
-			#			 Comments and Processing Instructions.
-			#
-			if (preg_match('{^</?(?:'.$this->auto_close_tags_re.')\b}', $tag) ||
-				$tag{1} == '!' || $tag{1} == '?')
-			{
-				# Just add the tag to the block as if it was text.
-				$block_text .= $tag;
-			}
-			else {
-				#
-				# Increase/decrease nested tag count. Only do so if
-				# the tag's name match base tag's.
-				#
-				if (preg_match('{^</?'.$base_tag_name_re.'\b}', $tag)) {
-					if ($tag{1} == '/')						$depth--;
-					else if ($tag{strlen($tag)-2} != '/')	$depth++;
-				}
-				
-				#
-				# Check for `markdown="1"` attribute and handle it.
-				#
-				if ($md_attr && 
-					preg_match($markdown_attr_re, $tag, $attr_m) &&
-					preg_match('/^1|block|span$/', $attr_m[2] . $attr_m[3]))
-				{
-					# Remove `markdown` attribute from opening tag.
-					$tag = preg_replace($markdown_attr_re, '', $tag);
-					
-					# Check if text inside this tag must be parsed in span mode.
-					$this->mode = $attr_m[2] . $attr_m[3];
-					$span_mode = $this->mode == 'span' || $this->mode != 'block' &&
-						preg_match('{^<(?:'.$this->contain_span_tags_re.')\b}', $tag);
-					
-					# Calculate indent before tag.
-					if (preg_match('/(?:^|\n)( *?)(?! ).*?$/', $block_text, $matches)) {
-						$strlen = $this->utf8_strlen;
-						$indent = $strlen($matches[1], 'UTF-8');
-					} else {
-						$indent = 0;
-					}
-					
-					# End preceding block with this tag.
-					$block_text .= $tag;
-					$parsed .= $this->$hash_method($block_text);
-					
-					# Get enclosing tag name for the ParseMarkdown function.
-					# (This pattern makes $tag_name_re safe without quoting.)
-					preg_match('/^<([\w:$]*)\b/', $tag, $matches);
-					$tag_name_re = $matches[1];
-					
-					# Parse the content using the HTML-in-Markdown parser.
-					list ($block_text, $text)
-						= $this->_hashHTMLBlocks_inMarkdown($text, $indent, 
-							$tag_name_re, $span_mode);
-					
-					# Outdent markdown text.
-					if ($indent > 0) {
-						$block_text = preg_replace("/^[ ]{1,$indent}/m", "", 
-													$block_text);
-					}
-					
-					# Append tag content to parsed text.
-					if (!$span_mode)	$parsed .= "\n\n$block_text\n\n";
-					else				$parsed .= "$block_text";
-					
-					# Start over with a new block.
-					$block_text = "";
-				}
-				else $block_text .= $tag;
-			}
-			
-		} while ($depth > 0);
-		
-		#
-		# Hash last block text that wasn't processed inside the loop.
-		#
-		$parsed .= $this->$hash_method($block_text);
-		
-		return array($parsed, $text);
-	}
-
-
-	protected function hashClean($text) {
-	#
-	# Called whenever a tag must be hashed when a function inserts a "clean" tag
-	# in $text, it passes through this function and is automaticaly escaped, 
-	# blocking invalid nested overlap.
-	#
-		return $this->hashPart($text, 'C');
-	}
-
-
-	protected function doAnchors($text) {
-	#
-	# Turn Markdown link shortcuts into XHTML <a> tags.
-	#
-		if ($this->in_anchor) return $text;
-		$this->in_anchor = true;
-		
-		#
-		# First, handle reference-style links: [link text] [id]
-		#
-		$text = preg_replace_callback('{
-			(					# wrap whole match in $1
-			  \[
-				('.$this->nested_brackets_re.')	# link text = $2
-			  \]
-
-			  [ ]?				# one optional space
-			  (?:\n[ ]*)?		# one optional newline followed by spaces
-
-			  \[
-				(.*?)		# id = $3
-			  \]
-			)
-			}xs',
-			array($this, '_doAnchors_reference_callback'), $text);
-
-		#
-		# Next, inline-style links: [link text](url "optional title")
-		#
-		$text = preg_replace_callback('{
-			(				# wrap whole match in $1
-			  \[
-				('.$this->nested_brackets_re.')	# link text = $2
-			  \]
-			  \(			# literal paren
-				[ \n]*
-				(?:
-					<(.+?)>	# href = $3
-				|
-					('.$this->nested_url_parenthesis_re.')	# href = $4
-				)
-				[ \n]*
-				(			# $5
-				  ([\'"])	# quote char = $6
-				  (.*?)		# Title = $7
-				  \6		# matching quote
-				  [ \n]*	# ignore any spaces/tabs between closing quote and )
-				)?			# title is optional
-			  \)
-			  (?:[ ]? '.$this->id_class_attr_catch_re.' )?	 # $8 = id/class attributes
-			)
-			}xs',
-			array($this, '_doAnchors_inline_callback'), $text);
-
-		#
-		# Last, handle reference-style shortcuts: [link text]
-		# These must come last in case you've also got [link text][1]
-		# or [link text](/foo)
-		#
-		$text = preg_replace_callback('{
-			(					# wrap whole match in $1
-			  \[
-				([^\[\]]+)		# link text = $2; can\'t contain [ or ]
-			  \]
-			)
-			}xs',
-			array($this, '_doAnchors_reference_callback'), $text);
-
-		$this->in_anchor = false;
-		return $text;
-	}
-	protected function _doAnchors_reference_callback($matches) {
-		$whole_match =  $matches[1];
-		$link_text   =  $matches[2];
-		$link_id     =& $matches[3];
-
-		if ($link_id == "") {
-			# for shortcut links like [this][] or [this].
-			$link_id = $link_text;
-		}
-		
-		# lower-case and turn embedded newlines into spaces
-		$link_id = strtolower($link_id);
-		$link_id = preg_replace('{[ ]?\n}', ' ', $link_id);
-
-		if (isset($this->urls[$link_id])) {
-			$url = $this->urls[$link_id];
-			$url = $this->encodeURLAttribute($url);
-			
-			$result = "<a href=\"$url\"";
-			if ( isset( $this->titles[$link_id] ) ) {
-				$title = $this->titles[$link_id];
-				$title = $this->encodeAttribute($title);
-				$result .=  " title=\"$title\"";
-			}
-			if (isset($this->ref_attr[$link_id]))
-				$result .= $this->ref_attr[$link_id];
-		
-			$link_text = $this->runSpanGamut($link_text);
-			$result .= ">$link_text</a>";
-			$result = $this->hashPart($result);
-		}
-		else {
-			$result = $whole_match;
-		}
-		return $result;
-	}
-	protected function _doAnchors_inline_callback($matches) {
-		$whole_match	=  $matches[1];
-		$link_text		=  $this->runSpanGamut($matches[2]);
-		$url			=  $matches[3] == '' ? $matches[4] : $matches[3];
-		$title			=& $matches[7];
-		$attr  = $this->doExtraAttributes("a", $dummy =& $matches[8]);
-
-		// if the URL was of the form <s p a c e s> it got caught by the HTML
-		// tag parser and hashed. Need to reverse the process before using the URL.
-		$unhashed = $this->unhash($url);
-		if ($unhashed != $url)
-			$url = preg_replace('/^<(.*)>$/', '\1', $unhashed);
-
-		$url = $this->encodeURLAttribute($url);
-
-		$result = "<a href=\"$url\"";
-		if (isset($title)) {
-			$title = $this->encodeAttribute($title);
-			$result .=  " title=\"$title\"";
-		}
-		$result .= $attr;
-		
-		$link_text = $this->runSpanGamut($link_text);
-		$result .= ">$link_text</a>";
-
-		return $this->hashPart($result);
-	}
-
-
-	protected function doImages($text) {
-	#
-	# Turn Markdown image shortcuts into <img> tags.
-	#
-		#
-		# First, handle reference-style labeled images: ![alt text][id]
-		#
-		$text = preg_replace_callback('{
-			(				# wrap whole match in $1
-			  !\[
-				('.$this->nested_brackets_re.')		# alt text = $2
-			  \]
-
-			  [ ]?				# one optional space
-			  (?:\n[ ]*)?		# one optional newline followed by spaces
-
-			  \[
-				(.*?)		# id = $3
-			  \]
-
-			)
-			}xs', 
-			array($this, '_doImages_reference_callback'), $text);
-
-		#
-		# Next, handle inline images:  ![alt text](url "optional title")
-		# Don't forget: encode * and _
-		#
-		$text = preg_replace_callback('{
-			(				# wrap whole match in $1
-			  !\[
-				('.$this->nested_brackets_re.')		# alt text = $2
-			  \]
-			  \s?			# One optional whitespace character
-			  \(			# literal paren
-				[ \n]*
-				(?:
-					<(\S*)>	# src url = $3
-				|
-					('.$this->nested_url_parenthesis_re.')	# src url = $4
-				)
-				[ \n]*
-				(			# $5
-				  ([\'"])	# quote char = $6
-				  (.*?)		# title = $7
-				  \6		# matching quote
-				  [ \n]*
-				)?			# title is optional
-			  \)
-			  (?:[ ]? '.$this->id_class_attr_catch_re.' )?	 # $8 = id/class attributes
-			)
-			}xs',
-			array($this, '_doImages_inline_callback'), $text);
-
-		return $text;
-	}
-	protected function _doImages_reference_callback($matches) {
-		$whole_match = $matches[1];
-		$alt_text    = $matches[2];
-		$link_id     = strtolower($matches[3]);
-
-		if ($link_id == "") {
-			$link_id = strtolower($alt_text); # for shortcut links like ![this][].
-		}
-
-		$alt_text = $this->encodeAttribute($alt_text);
-		if (isset($this->urls[$link_id])) {
-			$url = $this->encodeURLAttribute($this->urls[$link_id]);
-			$result = "<img src=\"$url\" alt=\"$alt_text\"";
-			if (isset($this->titles[$link_id])) {
-				$title = $this->titles[$link_id];
-				$title = $this->encodeAttribute($title);
-				$result .=  " title=\"$title\"";
-			}
-			if (isset($this->ref_attr[$link_id]))
-				$result .= $this->ref_attr[$link_id];
-			$result .= $this->empty_element_suffix;
-			$result = $this->hashPart($result);
-		}
-		else {
-			# If there's no such link ID, leave intact:
-			$result = $whole_match;
-		}
-
-		return $result;
-	}
-	protected function _doImages_inline_callback($matches) {
-		$whole_match	= $matches[1];
-		$alt_text		= $matches[2];
-		$url			= $matches[3] == '' ? $matches[4] : $matches[3];
-		$title			=& $matches[7];
-		$attr  = $this->doExtraAttributes("img", $dummy =& $matches[8]);
-
-		$alt_text = $this->encodeAttribute($alt_text);
-		$url = $this->encodeURLAttribute($url);
-		$result = "<img src=\"$url\" alt=\"$alt_text\"";
-		if (isset($title)) {
-			$title = $this->encodeAttribute($title);
-			$result .=  " title=\"$title\""; # $title already quoted
-		}
-		$result .= $attr;
-		$result .= $this->empty_element_suffix;
-
-		return $this->hashPart($result);
-	}
-
-
-	protected function doHeaders($text) {
-	#
-	# Redefined to add id and class attribute support.
-	#
-		# Setext-style headers:
-		#	  Header 1  {#header1}
-		#	  ========
-		#  
-		#	  Header 2  {#header2 .class1 .class2}
-		#	  --------
-		#
-		$text = preg_replace_callback(
-			'{
-				(^.+?)								# $1: Header text
-				(?:[ ]+ '.$this->id_class_attr_catch_re.' )?	 # $3 = id/class attributes
-				[ ]*\n(=+|-+)[ ]*\n+				# $3: Header footer
-			}mx',
-			array($this, '_doHeaders_callback_setext'), $text);
-
-		# atx-style headers:
-		#	# Header 1        {#header1}
-		#	## Header 2       {#header2}
-		#	## Header 2 with closing hashes ##  {#header3.class1.class2}
-		#	...
-		#	###### Header 6   {.class2}
-		#
-		$text = preg_replace_callback('{
-				^(\#{1,6})	# $1 = string of #\'s
-				[ ]*
-				(.+?)		# $2 = Header text
-				[ ]*
-				\#*			# optional closing #\'s (not counted)
-				(?:[ ]+ '.$this->id_class_attr_catch_re.' )?	 # $3 = id/class attributes
-				[ ]*
-				\n+
-			}xm',
-			array($this, '_doHeaders_callback_atx'), $text);
-
-		return $text;
-	}
-	protected function _doHeaders_callback_setext($matches) {
-		if ($matches[3] == '-' && preg_match('{^- }', $matches[1]))
-			return $matches[0];
-		$level = $matches[3]{0} == '=' ? 1 : 2;
-		$attr  = $this->doExtraAttributes("h$level", $dummy =& $matches[2]);
-		$block = "<h$level$attr>".$this->runSpanGamut($matches[1])."</h$level>";
-		return "\n" . $this->hashBlock($block) . "\n\n";
-	}
-	protected function _doHeaders_callback_atx($matches) {
-		$level = strlen($matches[1]);
-		$attr  = $this->doExtraAttributes("h$level", $dummy =& $matches[3]);
-		$block = "<h$level$attr>".$this->runSpanGamut($matches[2])."</h$level>";
-		return "\n" . $this->hashBlock($block) . "\n\n";
-	}
-
-
-	protected function doTables($text) {
-	#
-	# Form HTML tables.
-	#
-		$less_than_tab = $this->tab_width - 1;
-		#
-		# Find tables with leading pipe.
-		#
-		#	| Header 1 | Header 2
-		#	| -------- | --------
-		#	| Cell 1   | Cell 2
-		#	| Cell 3   | Cell 4
-		#
-		$text = preg_replace_callback('
-			{
-				^							# Start of a line
-				[ ]{0,'.$less_than_tab.'}	# Allowed whitespace.
-				[|]							# Optional leading pipe (present)
-				(.+) \n						# $1: Header row (at least one pipe)
-				
-				[ ]{0,'.$less_than_tab.'}	# Allowed whitespace.
-				[|] ([ ]*[-:]+[-| :]*) \n	# $2: Header underline
-				
-				(							# $3: Cells
-					(?>
-						[ ]*				# Allowed whitespace.
-						[|] .* \n			# Row content.
-					)*
-				)
-				(?=\n|\Z)					# Stop at final double newline.
-			}xm',
-			array($this, '_doTable_leadingPipe_callback'), $text);
-		
-		#
-		# Find tables without leading pipe.
-		#
-		#	Header 1 | Header 2
-		#	-------- | --------
-		#	Cell 1   | Cell 2
-		#	Cell 3   | Cell 4
-		#
-		$text = preg_replace_callback('
-			{
-				^							# Start of a line
-				[ ]{0,'.$less_than_tab.'}	# Allowed whitespace.
-				(\S.*[|].*) \n				# $1: Header row (at least one pipe)
-				
-				[ ]{0,'.$less_than_tab.'}	# Allowed whitespace.
-				([-:]+[ ]*[|][-| :]*) \n	# $2: Header underline
-				
-				(							# $3: Cells
-					(?>
-						.* [|] .* \n		# Row content
-					)*
-				)
-				(?=\n|\Z)					# Stop at final double newline.
-			}xm',
-			array($this, '_DoTable_callback'), $text);
-
-		return $text;
-	}
-	protected function _doTable_leadingPipe_callback($matches) {
-		$head		= $matches[1];
-		$underline	= $matches[2];
-		$content	= $matches[3];
-		
-		# Remove leading pipe for each row.
-		$content	= preg_replace('/^ *[|]/m', '', $content);
-		
-		return $this->_doTable_callback(array($matches[0], $head, $underline, $content));
-	}
-	protected function _doTable_makeAlignAttr($alignname)
-	{
-		if (empty($this->table_align_class_tmpl))
-			return " align=\"$alignname\"";
-
-		$classname = str_replace('%%', $alignname, $this->table_align_class_tmpl);
-		return " class=\"$classname\"";
-	}
-	protected function _doTable_callback($matches) {
-		$head		= $matches[1];
-		$underline	= $matches[2];
-		$content	= $matches[3];
-
-		# Remove any tailing pipes for each line.
-		$head		= preg_replace('/[|] *$/m', '', $head);
-		$underline	= preg_replace('/[|] *$/m', '', $underline);
-		$content	= preg_replace('/[|] *$/m', '', $content);
-		
-		# Reading alignement from header underline.
-		$separators	= preg_split('/ *[|] */', $underline);
-		foreach ($separators as $n => $s) {
-			if (preg_match('/^ *-+: *$/', $s))
-				$attr[$n] = $this->_doTable_makeAlignAttr('right');
-			else if (preg_match('/^ *:-+: *$/', $s))
-				$attr[$n] = $this->_doTable_makeAlignAttr('center');
-			else if (preg_match('/^ *:-+ *$/', $s))
-				$attr[$n] = $this->_doTable_makeAlignAttr('left');
-			else
-				$attr[$n] = '';
-		}
-		
-		# Parsing span elements, including code spans, character escapes, 
-		# and inline HTML tags, so that pipes inside those gets ignored.
-		$head		= $this->parseSpan($head);
-		$headers	= preg_split('/ *[|] */', $head);
-		$col_count	= count($headers);
-		$attr       = array_pad($attr, $col_count, '');
-		
-		# Write column headers.
-		$text = "<table>\n";
-		$text .= "<thead>\n";
-		$text .= "<tr>\n";
-		foreach ($headers as $n => $header)
-			$text .= "  <th$attr[$n]>".$this->runSpanGamut(trim($header))."</th>\n";
-		$text .= "</tr>\n";
-		$text .= "</thead>\n";
-		
-		# Split content by row.
-		$rows = explode("\n", trim($content, "\n"));
-		
-		$text .= "<tbody>\n";
-		foreach ($rows as $row) {
-			# Parsing span elements, including code spans, character escapes, 
-			# and inline HTML tags, so that pipes inside those gets ignored.
-			$row = $this->parseSpan($row);
-			
-			# Split row by cell.
-			$row_cells = preg_split('/ *[|] */', $row, $col_count);
-			$row_cells = array_pad($row_cells, $col_count, '');
-			
-			$text .= "<tr>\n";
-			foreach ($row_cells as $n => $cell)
-				$text .= "  <td$attr[$n]>".$this->runSpanGamut(trim($cell))."</td>\n";
-			$text .= "</tr>\n";
-		}
-		$text .= "</tbody>\n";
-		$text .= "</table>";
-		
-		return $this->hashBlock($text) . "\n";
-	}
-
-	
-	protected function doDefLists($text) {
-	#
-	# Form HTML definition lists.
-	#
-		$less_than_tab = $this->tab_width - 1;
-
-		# Re-usable pattern to match any entire dl list:
-		$whole_list_re = '(?>
-			(								# $1 = whole list
-			  (								# $2
-				[ ]{0,'.$less_than_tab.'}
-				((?>.*\S.*\n)+)				# $3 = defined term
-				\n?
-				[ ]{0,'.$less_than_tab.'}:[ ]+ # colon starting definition
-			  )
-			  (?s:.+?)
-			  (								# $4
-				  \z
-				|
-				  \n{2,}
-				  (?=\S)
-				  (?!						# Negative lookahead for another term
-					[ ]{0,'.$less_than_tab.'}
-					(?: \S.*\n )+?			# defined term
-					\n?
-					[ ]{0,'.$less_than_tab.'}:[ ]+ # colon starting definition
-				  )
-				  (?!						# Negative lookahead for another definition
-					[ ]{0,'.$less_than_tab.'}:[ ]+ # colon starting definition
-				  )
-			  )
-			)
-		)'; // mx
-
-		$text = preg_replace_callback('{
-				(?>\A\n?|(?<=\n\n))
-				'.$whole_list_re.'
-			}mx',
-			array($this, '_doDefLists_callback'), $text);
-
-		return $text;
-	}
-	protected function _doDefLists_callback($matches) {
-		# Re-usable patterns to match list item bullets and number markers:
-		$list = $matches[1];
-		
-		# Turn double returns into triple returns, so that we can make a
-		# paragraph for the last item in a list, if necessary:
-		$result = trim($this->processDefListItems($list));
-		$result = "<dl>\n" . $result . "\n</dl>";
-		return $this->hashBlock($result) . "\n\n";
-	}
-
-
-	protected function processDefListItems($list_str) {
-	#
-	#	Process the contents of a single definition list, splitting it
-	#	into individual term and definition list items.
-	#
-		$less_than_tab = $this->tab_width - 1;
-		
-		# trim trailing blank lines:
-		$list_str = preg_replace("/\n{2,}\\z/", "\n", $list_str);
-
-		# Process definition terms.
-		$list_str = preg_replace_callback('{
-			(?>\A\n?|\n\n+)					# leading line
-			(								# definition terms = $1
-				[ ]{0,'.$less_than_tab.'}	# leading whitespace
-				(?!\:[ ]|[ ])				# negative lookahead for a definition
-											#   mark (colon) or more whitespace.
-				(?> \S.* \n)+?				# actual term (not whitespace).	
-			)			
-			(?=\n?[ ]{0,3}:[ ])				# lookahead for following line feed 
-											#   with a definition mark.
-			}xm',
-			array($this, '_processDefListItems_callback_dt'), $list_str);
-
-		# Process actual definitions.
-		$list_str = preg_replace_callback('{
-			\n(\n+)?						# leading line = $1
-			(								# marker space = $2
-				[ ]{0,'.$less_than_tab.'}	# whitespace before colon
-				\:[ ]+						# definition mark (colon)
-			)
-			((?s:.+?))						# definition text = $3
-			(?= \n+ 						# stop at next definition mark,
-				(?:							# next term or end of text
-					[ ]{0,'.$less_than_tab.'} \:[ ]	|
-					<dt> | \z
-				)						
-			)					
-			}xm',
-			array($this, '_processDefListItems_callback_dd'), $list_str);
-
-		return $list_str;
-	}
-	protected function _processDefListItems_callback_dt($matches) {
-		$terms = explode("\n", trim($matches[1]));
-		$text = '';
-		foreach ($terms as $term) {
-			$term = $this->runSpanGamut(trim($term));
-			$text .= "\n<dt>" . $term . "</dt>";
-		}
-		return $text . "\n";
-	}
-	protected function _processDefListItems_callback_dd($matches) {
-		$leading_line	= $matches[1];
-		$marker_space	= $matches[2];
-		$def			= $matches[3];
-
-		if ($leading_line || preg_match('/\n{2,}/', $def)) {
-			# Replace marker with the appropriate whitespace indentation
-			$def = str_repeat(' ', strlen($marker_space)) . $def;
-			$def = $this->runBlockGamut($this->outdent($def . "\n\n"));
-			$def = "\n". $def ."\n";
-		}
-		else {
-			$def = rtrim($def);
-			$def = $this->runSpanGamut($this->outdent($def));
-		}
-
-		return "\n<dd>" . $def . "</dd>\n";
-	}
-
-
-	protected function doFencedCodeBlocks($text) {
-	#
-	# Adding the fenced code block syntax to regular Markdown:
-	#
-	# ~~~
-	# Code block
-	# ~~~
-	#
-		$less_than_tab = $this->tab_width;
-		
-		$text = preg_replace_callback('{
-				(?:\n|\A)
-				# 1: Opening marker
-				(
-					(?:~{3,}|`{3,}) # 3 or more tildes/backticks.
-				)
-				[ ]*
-				(?:
-					\.?([-_:a-zA-Z0-9]+) # 2: standalone class name
-				|
-					'.$this->id_class_attr_catch_re.' # 3: Extra attributes
-				)?
-				[ ]* \n # Whitespace and newline following marker.
-				
-				# 4: Content
-				(
-					(?>
-						(?!\1 [ ]* \n)	# Not a closing marker.
-						.*\n+
-					)+
-				)
-				
-				# Closing marker.
-				\1 [ ]* (?= \n )
-			}xm',
-			array($this, '_doFencedCodeBlocks_callback'), $text);
-
-		return $text;
-	}
-	protected function _doFencedCodeBlocks_callback($matches) {
-		$classname =& $matches[2];
-		$attrs     =& $matches[3];
-		$codeblock = $matches[4];
-		$codeblock = htmlspecialchars($codeblock, ENT_NOQUOTES);
-		$codeblock = preg_replace_callback('/^\n+/',
-			array($this, '_doFencedCodeBlocks_newlines'), $codeblock);
-
-		if ($classname != "") {
-			if ($classname{0} == '.')
-				$classname = substr($classname, 1);
-			$attr_str = ' class="'.$this->code_class_prefix.$classname.'"';
-		} else {
-			$attr_str = $this->doExtraAttributes($this->code_attr_on_pre ? "pre" : "code", $attrs);
-		}
-		$pre_attr_str  = $this->code_attr_on_pre ? $attr_str : '';
-		$code_attr_str = $this->code_attr_on_pre ? '' : $attr_str;
-		$codeblock  = "<pre$pre_attr_str><code$code_attr_str>$codeblock</code></pre>";
-		
-		return "\n\n".$this->hashBlock($codeblock)."\n\n";
-	}
-	protected function _doFencedCodeBlocks_newlines($matches) {
-		return str_repeat("<br$this->empty_element_suffix", 
-			strlen($matches[0]));
-	}
-
-
-	#
-	# Redefining emphasis markers so that emphasis by underscore does not
-	# work in the middle of a word.
-	#
-	protected $em_relist = array(
-		''  => '(?:(?<!\*)\*(?!\*)|(?<![a-zA-Z0-9_])_(?!_))(?![\.,:;]?\s)',
-		'*' => '(?<![\s*])\*(?!\*)',
-		'_' => '(?<![\s_])_(?![a-zA-Z0-9_])',
-		);
-	protected $strong_relist = array(
-		''   => '(?:(?<!\*)\*\*(?!\*)|(?<![a-zA-Z0-9_])__(?!_))(?![\.,:;]?\s)',
-		'**' => '(?<![\s*])\*\*(?!\*)',
-		'__' => '(?<![\s_])__(?![a-zA-Z0-9_])',
-		);
-	protected $em_strong_relist = array(
-		''    => '(?:(?<!\*)\*\*\*(?!\*)|(?<![a-zA-Z0-9_])___(?!_))(?![\.,:;]?\s)',
-		'***' => '(?<![\s*])\*\*\*(?!\*)',
-		'___' => '(?<![\s_])___(?![a-zA-Z0-9_])',
-		);
-
-
-	protected function formParagraphs($text) {
-	#
-	#	Params:
-	#		$text - string to process with html <p> tags
-	#
-		# Strip leading and trailing lines:
-		$text = preg_replace('/\A\n+|\n+\z/', '', $text);
-		
-		$grafs = preg_split('/\n{2,}/', $text, -1, PREG_SPLIT_NO_EMPTY);
-
-		#
-		# Wrap <p> tags and unhashify HTML blocks
-		#
-		foreach ($grafs as $key => $value) {
-			$value = trim($this->runSpanGamut($value));
-			
-			# Check if this should be enclosed in a paragraph.
-			# Clean tag hashes & block tag hashes are left alone.
-			$is_p = !preg_match('/^B\x1A[0-9]+B|^C\x1A[0-9]+C$/', $value);
-			
-			if ($is_p) {
-				$value = "<p>$value</p>";
-			}
-			$grafs[$key] = $value;
-		}
-		
-		# Join grafs in one text, then unhash HTML tags. 
-		$text = implode("\n\n", $grafs);
-		
-		# Finish by removing any tag hashes still present in $text.
-		$text = $this->unhash($text);
-		
-		return $text;
-	}
-	
-	
-	### Footnotes
-	
-	protected function stripFootnotes($text) {
-	#
-	# Strips link definitions from text, stores the URLs and titles in
-	# hash references.
-	#
-		$less_than_tab = $this->tab_width - 1;
-
-		# Link defs are in the form: [^id]: url "optional title"
-		$text = preg_replace_callback('{
-			^[ ]{0,'.$less_than_tab.'}\[\^(.+?)\][ ]?:	# note_id = $1
-			  [ ]*
-			  \n?					# maybe *one* newline
-			(						# text = $2 (no blank lines allowed)
-				(?:					
-					.+				# actual text
-				|
-					\n				# newlines but 
-					(?!\[.+?\][ ]?:\s)# negative lookahead for footnote or link definition marker.
-					(?!\n+[ ]{0,3}\S)# ensure line is not blank and followed 
-									# by non-indented content
-				)*
-			)		
-			}xm',
-			array($this, '_stripFootnotes_callback'),
-			$text);
-		return $text;
-	}
-	protected function _stripFootnotes_callback($matches) {
-		$note_id = $this->fn_id_prefix . $matches[1];
-		$this->footnotes[$note_id] = $this->outdent($matches[2]);
-		return ''; # String that will replace the block
-	}
-
-
-	protected function doFootnotes($text) {
-	#
-	# Replace footnote references in $text [^id] with a special text-token 
-	# which will be replaced by the actual footnote marker in appendFootnotes.
-	#
-		if (!$this->in_anchor) {
-			$text = preg_replace('{\[\^(.+?)\]}', "F\x1Afn:\\1\x1A:", $text);
-		}
-		return $text;
-	}
-
-	
-	protected function appendFootnotes($text) {
-	#
-	# Append footnote list to text.
-	#
-		$text = preg_replace_callback('{F\x1Afn:(.*?)\x1A:}', 
-			array($this, '_appendFootnotes_callback'), $text);
-	
-		if (!empty($this->footnotes_ordered)) {
-			$text .= "\n\n";
-			$text .= "<div class=\"footnotes\">\n";
-			$text .= "<hr". $this->empty_element_suffix ."\n";
-			$text .= "<ol>\n\n";
-
-			$attr = "";
-			if ($this->fn_backlink_class != "") {
-				$class = $this->fn_backlink_class;
-				$class = $this->encodeAttribute($class);
-				$attr .= " class=\"$class\"";
-			}
-			if ($this->fn_backlink_title != "") {
-				$title = $this->fn_backlink_title;
-				$title = $this->encodeAttribute($title);
-				$attr .= " title=\"$title\"";
-			}
-			$num = 0;
-			
-			while (!empty($this->footnotes_ordered)) {
-				$footnote = reset($this->footnotes_ordered);
-				$note_id = key($this->footnotes_ordered);
-				unset($this->footnotes_ordered[$note_id]);
-				$ref_count = $this->footnotes_ref_count[$note_id];
-				unset($this->footnotes_ref_count[$note_id]);
-				unset($this->footnotes[$note_id]);
-				
-				$footnote .= "\n"; # Need to append newline before parsing.
-				$footnote = $this->runBlockGamut("$footnote\n");				
-				$footnote = preg_replace_callback('{F\x1Afn:(.*?)\x1A:}', 
-					array($this, '_appendFootnotes_callback'), $footnote);
-				
-				$attr = str_replace("%%", ++$num, $attr);
-				$note_id = $this->encodeAttribute($note_id);
-
-				# Prepare backlink, multiple backlinks if multiple references
-				$backlink = "<a href=\"#fnref:$note_id\"$attr>&#8617;</a>";
-				for ($ref_num = 2; $ref_num <= $ref_count; ++$ref_num) {
-					$backlink .= " <a href=\"#fnref$ref_num:$note_id\"$attr>&#8617;</a>";
-				}
-				# Add backlink to last paragraph; create new paragraph if needed.
-				if (preg_match('{</p>$}', $footnote)) {
-					$footnote = substr($footnote, 0, -4) . "&#160;$backlink</p>";
-				} else {
-					$footnote .= "\n\n<p>$backlink</p>";
-				}
-				
-				$text .= "<li id=\"fn:$note_id\">\n";
-				$text .= $footnote . "\n";
-				$text .= "</li>\n\n";
-			}
-			
-			$text .= "</ol>\n";
-			$text .= "</div>";
-		}
-		return $text;
-	}
-	protected function _appendFootnotes_callback($matches) {
-		$node_id = $this->fn_id_prefix . $matches[1];
-		
-		# Create footnote marker only if it has a corresponding footnote *and*
-		# the footnote hasn't been used by another marker.
-		if (isset($this->footnotes[$node_id])) {
-			$num =& $this->footnotes_numbers[$node_id];
-			if (!isset($num)) {
-				# Transfer footnote content to the ordered list and give it its
-				# number
-				$this->footnotes_ordered[$node_id] = $this->footnotes[$node_id];
-				$this->footnotes_ref_count[$node_id] = 1;
-				$num = $this->footnote_counter++;
-				$ref_count_mark = '';
-			} else {
-				$ref_count_mark = $this->footnotes_ref_count[$node_id] += 1;
-			}
-
-			$attr = "";
-			if ($this->fn_link_class != "") {
-				$class = $this->fn_link_class;
-				$class = $this->encodeAttribute($class);
-				$attr .= " class=\"$class\"";
-			}
-			if ($this->fn_link_title != "") {
-				$title = $this->fn_link_title;
-				$title = $this->encodeAttribute($title);
-				$attr .= " title=\"$title\"";
-			}
-			
-			$attr = str_replace("%%", $num, $attr);
-			$node_id = $this->encodeAttribute($node_id);
-			
-			return
-				"<sup id=\"fnref$ref_count_mark:$node_id\">".
-				"<a href=\"#fn:$node_id\"$attr>$num</a>".
-				"</sup>";
-		}
-		
-		return "[^".$matches[1]."]";
-	}
-		
-	
-	### Abbreviations ###
-	
-	protected function stripAbbreviations($text) {
-	#
-	# Strips abbreviations from text, stores titles in hash references.
-	#
-		$less_than_tab = $this->tab_width - 1;
-
-		# Link defs are in the form: [id]*: url "optional title"
-		$text = preg_replace_callback('{
-			^[ ]{0,'.$less_than_tab.'}\*\[(.+?)\][ ]?:	# abbr_id = $1
-			(.*)					# text = $2 (no blank lines allowed)	
-			}xm',
-			array($this, '_stripAbbreviations_callback'),
-			$text);
-		return $text;
-	}
-	protected function _stripAbbreviations_callback($matches) {
-		$abbr_word = $matches[1];
-		$abbr_desc = $matches[2];
-		if ($this->abbr_word_re)
-			$this->abbr_word_re .= '|';
-		$this->abbr_word_re .= preg_quote($abbr_word);
-		$this->abbr_desciptions[$abbr_word] = trim($abbr_desc);
-		return ''; # String that will replace the block
-	}
-	
-	
-	protected function doAbbreviations($text) {
-	#
-	# Find defined abbreviations in text and wrap them in <abbr> elements.
-	#
-		if ($this->abbr_word_re) {
-			// cannot use the /x modifier because abbr_word_re may 
-			// contain significant spaces:
-			$text = preg_replace_callback('{'.
-				'(?<![\w\x1A])'.
-				'(?:'.$this->abbr_word_re.')'.
-				'(?![\w\x1A])'.
-				'}', 
-				array($this, '_doAbbreviations_callback'), $text);
-		}
-		return $text;
-	}
-	protected function _doAbbreviations_callback($matches) {
-		$abbr = $matches[0];
-		if (isset($this->abbr_desciptions[$abbr])) {
-			$desc = $this->abbr_desciptions[$abbr];
-			if (empty($desc)) {
-				return $this->hashPart("<abbr>$abbr</abbr>");
-			} else {
-				$desc = $this->encodeAttribute($desc);
-				return $this->hashPart("<abbr title=\"$desc\">$abbr</abbr>");
-			}
-		} else {
-			return $matches[0];
-		}
-	}
-
-}
diff --git a/vendor/Michelf/MarkdownExtra.inc.php b/vendor/Michelf/MarkdownExtra.inc.php
deleted file mode 100644
index e11b1ef9..00000000
--- a/vendor/Michelf/MarkdownExtra.inc.php
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-
-# Use this file if you cannot use class autoloading. It will include all the
-# files needed for the MarkdownExtra parser.
-#
-# Take a look at the PSR-0-compatible class autoloading implementation
-# in the Readme.php file if you want a simple autoloader setup.
-
-require_once dirname(__FILE__) . '/MarkdownInterface.php';
-require_once dirname(__FILE__) . '/Markdown.php';
-require_once dirname(__FILE__) . '/MarkdownExtra.php';
diff --git a/vendor/Michelf/MarkdownExtra.php b/vendor/Michelf/MarkdownExtra.php
deleted file mode 100644
index 89822e4c..00000000
--- a/vendor/Michelf/MarkdownExtra.php
+++ /dev/null
@@ -1,38 +0,0 @@
-<?php
-#
-# Markdown Extra  -  A text-to-HTML conversion tool for web writers
-#
-# PHP Markdown Extra
-# Copyright (c) 2004-2014 Michel Fortin  
-# <http://michelf.com/projects/php-markdown/>
-#
-# Original Markdown
-# Copyright (c) 2004-2006 John Gruber  
-# <http://daringfireball.net/projects/markdown/>
-#
-namespace Michelf;
-
-
-# Just force Michelf/Markdown.php to load. This is needed to load
-# the temporary implementation class. See below for details.
-\Michelf\Markdown::MARKDOWNLIB_VERSION;
-
-#
-# Markdown Extra Parser Class
-#
-# Note: Currently the implementation resides in the temporary class
-# \Michelf\MarkdownExtra_TmpImpl (in the same file as \Michelf\Markdown).
-# This makes it easier to propagate the changes between the three different
-# packaging styles of PHP Markdown. Once this issue is resolved, the
-# _MarkdownExtra_TmpImpl will disappear and this one will contain the code.
-#
-
-class MarkdownExtra extends \Michelf\_MarkdownExtra_TmpImpl {
-
-	### Parser Implementation ###
-
-	# Temporarily, the implemenation is in the _MarkdownExtra_TmpImpl class.
-	# See note above.
-
-}
-
diff --git a/vendor/Michelf/MarkdownInterface.inc.php b/vendor/Michelf/MarkdownInterface.inc.php
deleted file mode 100644
index a023ed4e..00000000
--- a/vendor/Michelf/MarkdownInterface.inc.php
+++ /dev/null
@@ -1,9 +0,0 @@
-<?php
-
-# Use this file if you cannot use class autoloading. It will include all the
-# files needed for the MarkdownInterface interface.
-#
-# Take a look at the PSR-0-compatible class autoloading implementation
-# in the Readme.php file if you want a simple autoloader setup.
-
-require_once dirname(__FILE__) . '/MarkdownInterface.php';
diff --git a/vendor/Michelf/MarkdownInterface.php b/vendor/Michelf/MarkdownInterface.php
deleted file mode 100644
index e4c2931f..00000000
--- a/vendor/Michelf/MarkdownInterface.php
+++ /dev/null
@@ -1,34 +0,0 @@
-<?php
-#
-# Markdown  -  A text-to-HTML conversion tool for web writers
-#
-# PHP Markdown
-# Copyright (c) 2004-2014 Michel Fortin
-# <http://michelf.com/projects/php-markdown/>
-#
-# Original Markdown
-# Copyright (c) 2004-2006 John Gruber
-# <http://daringfireball.net/projects/markdown/>
-#
-namespace Michelf;
-
-
-#
-# Markdown Parser Interface
-#
-
-interface MarkdownInterface {
-
-  #
-  # Initialize the parser and return the result of its transform method.
-  # This will work fine for derived classes too.
-  #
-  public static function defaultTransform($text);
-
-  #
-  # Main function. Performs some preprocessing on the input text
-  # and pass it through the document gamut.
-  #
-  public function transform($text);
-
-}
diff --git a/vendor/Parsedown/LICENSE.txt b/vendor/Parsedown/LICENSE.txt
new file mode 100644
index 00000000..baca86f5
--- /dev/null
+++ b/vendor/Parsedown/LICENSE.txt
@@ -0,0 +1,20 @@
+The MIT License (MIT)
+
+Copyright (c) 2013 Emanuil Rusev, erusev.com
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
\ No newline at end of file
diff --git a/vendor/Parsedown/Parsedown.php b/vendor/Parsedown/Parsedown.php
new file mode 100644
index 00000000..5d6f0f76
--- /dev/null
+++ b/vendor/Parsedown/Parsedown.php
@@ -0,0 +1,1423 @@
+<?php
+
+namespace Parsedown;
+
+#
+#
+# Parsedown
+# http://parsedown.org
+#
+# (c) Emanuil Rusev
+# http://erusev.com
+#
+# For the full license information, view the LICENSE file that was distributed
+# with this source code.
+#
+#
+
+class Parsedown
+{
+    #
+    # Philosophy
+
+    # Parsedown recognises that the Markdown syntax is optimised for humans so
+    # it tries to read like one. It goes through text line by line. It looks at
+    # how lines start to identify blocks. It looks for special characters to
+    # identify inline elements.
+
+    #
+    # ~
+
+    function text($text)
+    {
+        # make sure no definitions are set
+        $this->Definitions = array();
+
+        # standardize line breaks
+        $text = str_replace("\r\n", "\n", $text);
+        $text = str_replace("\r", "\n", $text);
+
+        # replace tabs with spaces
+        $text = str_replace("\t", '    ', $text);
+
+        # remove surrounding line breaks
+        $text = trim($text, "\n");
+
+        # split text into lines
+        $lines = explode("\n", $text);
+
+        # iterate through lines to identify blocks
+        $markup = $this->lines($lines);
+
+        # trim line breaks
+        $markup = trim($markup, "\n");
+
+        return $markup;
+    }
+
+    #
+    # Setters
+    #
+
+    private $breaksEnabled;
+
+    function setBreaksEnabled($breaksEnabled)
+    {
+        $this->breaksEnabled = $breaksEnabled;
+
+        return $this;
+    }
+
+    private $markupEscaped;
+
+    function setMarkupEscaped($markupEscaped)
+    {
+        $this->markupEscaped = $markupEscaped;
+
+        return $this;
+    }
+
+    #
+    # Lines
+    #
+
+    protected $BlockTypes = array(
+        '#' => array('Atx'),
+        '*' => array('Rule', 'List'),
+        '+' => array('List'),
+        '-' => array('Setext', 'Table', 'Rule', 'List'),
+        '0' => array('List'),
+        '1' => array('List'),
+        '2' => array('List'),
+        '3' => array('List'),
+        '4' => array('List'),
+        '5' => array('List'),
+        '6' => array('List'),
+        '7' => array('List'),
+        '8' => array('List'),
+        '9' => array('List'),
+        ':' => array('Table'),
+        '<' => array('Comment', 'Markup'),
+        '=' => array('Setext'),
+        '>' => array('Quote'),
+        '_' => array('Rule'),
+        '`' => array('FencedCode'),
+        '|' => array('Table'),
+        '~' => array('FencedCode'),
+    );
+
+    # ~
+
+    protected $DefinitionTypes = array(
+        '[' => array('Reference'),
+    );
+
+    # ~
+
+    protected $unmarkedBlockTypes = array(
+        'CodeBlock',
+    );
+
+    #
+    # Blocks
+    #
+
+    private function lines(array $lines)
+    {
+        $CurrentBlock = null;
+
+        foreach ($lines as $line)
+        {
+            if (chop($line) === '')
+            {
+                if (isset($CurrentBlock))
+                {
+                    $CurrentBlock['interrupted'] = true;
+                }
+
+                continue;
+            }
+
+            $indent = 0;
+
+            while (isset($line[$indent]) and $line[$indent] === ' ')
+            {
+                $indent ++;
+            }
+
+            $text = $indent > 0 ? substr($line, $indent) : $line;
+
+            # ~
+
+            $Line = array('body' => $line, 'indent' => $indent, 'text' => $text);
+
+            # ~
+
+            if (isset($CurrentBlock['incomplete']))
+            {
+                $Block = $this->{'addTo'.$CurrentBlock['type']}($Line, $CurrentBlock);
+
+                if (isset($Block))
+                {
+                    $CurrentBlock = $Block;
+
+                    continue;
+                }
+                else
+                {
+                    if (method_exists($this, 'complete'.$CurrentBlock['type']))
+                    {
+                        $CurrentBlock = $this->{'complete'.$CurrentBlock['type']}($CurrentBlock);
+                    }
+
+                    unset($CurrentBlock['incomplete']);
+                }
+            }
+
+            # ~
+
+            $marker = $text[0];
+
+            if (isset($this->DefinitionTypes[$marker]))
+            {
+                foreach ($this->DefinitionTypes[$marker] as $definitionType)
+                {
+                    $Definition = $this->{'identify'.$definitionType}($Line, $CurrentBlock);
+
+                    if (isset($Definition))
+                    {
+                        $this->Definitions[$definitionType][$Definition['id']] = $Definition['data'];
+
+                        continue 2;
+                    }
+                }
+            }
+
+            # ~
+
+            $blockTypes = $this->unmarkedBlockTypes;
+
+            if (isset($this->BlockTypes[$marker]))
+            {
+                foreach ($this->BlockTypes[$marker] as $blockType)
+                {
+                    $blockTypes []= $blockType;
+                }
+            }
+
+            #
+            # ~
+
+            foreach ($blockTypes as $blockType)
+            {
+                $Block = $this->{'identify'.$blockType}($Line, $CurrentBlock);
+
+                if (isset($Block))
+                {
+                    $Block['type'] = $blockType;
+
+                    if ( ! isset($Block['identified']))
+                    {
+                        $Elements []= $CurrentBlock['element'];
+
+                        $Block['identified'] = true;
+                    }
+
+                    if (method_exists($this, 'addTo'.$blockType))
+                    {
+                        $Block['incomplete'] = true;
+                    }
+
+                    $CurrentBlock = $Block;
+
+                    continue 2;
+                }
+            }
+
+            # ~
+
+            if (isset($CurrentBlock) and ! isset($CurrentBlock['type']) and ! isset($CurrentBlock['interrupted']))
+            {
+                $CurrentBlock['element']['text'] .= "\n".$text;
+            }
+            else
+            {
+                $Elements []= $CurrentBlock['element'];
+
+                $CurrentBlock = $this->buildParagraph($Line);
+
+                $CurrentBlock['identified'] = true;
+            }
+        }
+
+        # ~
+
+        if (isset($CurrentBlock['incomplete']) and method_exists($this, 'complete'.$CurrentBlock['type']))
+        {
+            $CurrentBlock = $this->{'complete'.$CurrentBlock['type']}($CurrentBlock);
+        }
+
+        # ~
+
+        $Elements []= $CurrentBlock['element'];
+
+        unset($Elements[0]);
+
+        # ~
+
+        $markup = $this->elements($Elements);
+
+        # ~
+
+        return $markup;
+    }
+
+    #
+    # Atx
+
+    protected function identifyAtx($Line)
+    {
+        if (isset($Line['text'][1]))
+        {
+            $level = 1;
+
+            while (isset($Line['text'][$level]) and $Line['text'][$level] === '#')
+            {
+                $level ++;
+            }
+
+            $text = trim($Line['text'], '# ');
+
+            $Block = array(
+                'element' => array(
+                    'name' => 'h' . min(6, $level),
+                    'text' => $text,
+                    'handler' => 'line',
+                ),
+            );
+
+            return $Block;
+        }
+    }
+
+    #
+    # Code
+
+    protected function identifyCodeBlock($Line)
+    {
+        if ($Line['indent'] >= 4)
+        {
+            $text = substr($Line['body'], 4);
+
+            $Block = array(
+                'element' => array(
+                    'name' => 'pre',
+                    'handler' => 'element',
+                    'text' => array(
+                        'name' => 'code',
+                        'text' => $text,
+                    ),
+                ),
+            );
+
+            return $Block;
+        }
+    }
+
+    protected function addToCodeBlock($Line, $Block)
+    {
+        if ($Line['indent'] >= 4)
+        {
+            if (isset($Block['interrupted']))
+            {
+                $Block['element']['text']['text'] .= "\n";
+
+                unset($Block['interrupted']);
+            }
+
+            $Block['element']['text']['text'] .= "\n";
+
+            $text = substr($Line['body'], 4);
+
+            $Block['element']['text']['text'] .= $text;
+
+            return $Block;
+        }
+    }
+
+    protected function completeCodeBlock($Block)
+    {
+        $text = $Block['element']['text']['text'];
+
+        $text = htmlspecialchars($text, ENT_NOQUOTES, 'UTF-8');
+
+        $Block['element']['text']['text'] = $text;
+
+        return $Block;
+    }
+
+    #
+    # Comment
+
+    protected function identifyComment($Line)
+    {
+        if (isset($Line['text'][3]) and $Line['text'][3] === '-' and $Line['text'][2] === '-' and $Line['text'][1] === '!')
+        {
+            $Block = array(
+                'element' => $Line['body'],
+            );
+
+            if (preg_match('/-->$/', $Line['text']))
+            {
+                $Block['closed'] = true;
+            }
+
+            return $Block;
+        }
+    }
+
+    protected function addToComment($Line, array $Block)
+    {
+        if (isset($Block['closed']))
+        {
+            return;
+        }
+
+        $Block['element'] .= "\n" . $Line['body'];
+
+        if (preg_match('/-->$/', $Line['text']))
+        {
+            $Block['closed'] = true;
+        }
+
+        return $Block;
+    }
+
+    #
+    # Fenced Code
+
+    protected function identifyFencedCode($Line)
+    {
+        if (preg_match('/^(['.$Line['text'][0].']{3,})[ ]*([\w-]+)?[ ]*$/', $Line['text'], $matches))
+        {
+            $Element = array(
+                'name' => 'code',
+                'text' => '',
+            );
+
+            if (isset($matches[2]))
+            {
+                $class = 'language-'.$matches[2];
+
+                $Element['attributes'] = array(
+                    'class' => $class,
+                );
+            }
+
+            $Block = array(
+                'char' => $Line['text'][0],
+                'element' => array(
+                    'name' => 'pre',
+                    'handler' => 'element',
+                    'text' => $Element,
+                ),
+            );
+
+            return $Block;
+        }
+    }
+
+    protected function addToFencedCode($Line, $Block)
+    {
+        if (isset($Block['complete']))
+        {
+            return;
+        }
+
+        if (isset($Block['interrupted']))
+        {
+            $Block['element']['text']['text'] .= "\n";
+
+            unset($Block['interrupted']);
+        }
+
+        if (preg_match('/^'.$Block['char'].'{3,}[ ]*$/', $Line['text']))
+        {
+            $Block['element']['text']['text'] = substr($Block['element']['text']['text'], 1);
+
+            $Block['complete'] = true;
+
+            return $Block;
+        }
+
+        $Block['element']['text']['text'] .= "\n".$Line['body'];;
+
+        return $Block;
+    }
+
+    protected function completeFencedCode($Block)
+    {
+        $text = $Block['element']['text']['text'];
+
+        $text = htmlspecialchars($text, ENT_NOQUOTES, 'UTF-8');
+
+        $Block['element']['text']['text'] = $text;
+
+        return $Block;
+    }
+
+    #
+    # List
+
+    protected function identifyList($Line)
+    {
+        list($name, $pattern) = $Line['text'][0] <= '-' ? array('ul', '[*+-]') : array('ol', '[0-9]+[.]');
+
+        if (preg_match('/^('.$pattern.'[ ]+)(.*)/', $Line['text'], $matches))
+        {
+            $Block = array(
+                'indent' => $Line['indent'],
+                'pattern' => $pattern,
+                'element' => array(
+                    'name' => $name,
+                    'handler' => 'elements',
+                ),
+            );
+
+            $Block['li'] = array(
+                'name' => 'li',
+                'handler' => 'li',
+                'text' => array(
+                    $matches[2],
+                ),
+            );
+
+            $Block['element']['text'] []= & $Block['li'];
+
+            return $Block;
+        }
+    }
+
+    protected function addToList($Line, array $Block)
+    {
+        if ($Block['indent'] === $Line['indent'] and preg_match('/^'.$Block['pattern'].'[ ]+(.*)/', $Line['text'], $matches))
+        {
+            if (isset($Block['interrupted']))
+            {
+                $Block['li']['text'] []= '';
+
+                unset($Block['interrupted']);
+            }
+
+            unset($Block['li']);
+
+            $Block['li'] = array(
+                'name' => 'li',
+                'handler' => 'li',
+                'text' => array(
+                    $matches[1],
+                ),
+            );
+
+            $Block['element']['text'] []= & $Block['li'];
+
+            return $Block;
+        }
+
+        if ( ! isset($Block['interrupted']))
+        {
+            $text = preg_replace('/^[ ]{0,4}/', '', $Line['body']);
+
+            $Block['li']['text'] []= $text;
+
+            return $Block;
+        }
+
+        if ($Line['indent'] > 0)
+        {
+            $Block['li']['text'] []= '';
+
+            $text = preg_replace('/^[ ]{0,4}/', '', $Line['body']);
+
+            $Block['li']['text'] []= $text;
+
+            unset($Block['interrupted']);
+
+            return $Block;
+        }
+    }
+
+    #
+    # Quote
+
+    protected function identifyQuote($Line)
+    {
+        if (preg_match('/^>[ ]?(.*)/', $Line['text'], $matches))
+        {
+            $Block = array(
+                'element' => array(
+                    'name' => 'blockquote',
+                    'handler' => 'lines',
+                    'text' => (array) $matches[1],
+                ),
+            );
+
+            return $Block;
+        }
+    }
+
+    protected function addToQuote($Line, array $Block)
+    {
+        if ($Line['text'][0] === '>' and preg_match('/^>[ ]?(.*)/', $Line['text'], $matches))
+        {
+            if (isset($Block['interrupted']))
+            {
+                $Block['element']['text'] []= '';
+
+                unset($Block['interrupted']);
+            }
+
+            $Block['element']['text'] []= $matches[1];
+
+            return $Block;
+        }
+
+        if ( ! isset($Block['interrupted']))
+        {
+            $Block['element']['text'] []= $Line['text'];
+
+            return $Block;
+        }
+    }
+
+    #
+    # Rule
+
+    protected function identifyRule($Line)
+    {
+        if (preg_match('/^(['.$Line['text'][0].'])([ ]{0,2}\1){2,}[ ]*$/', $Line['text']))
+        {
+            $Block = array(
+                'element' => array(
+                    'name' => 'hr'
+                ),
+            );
+
+            return $Block;
+        }
+    }
+
+    #
+    # Setext
+
+    protected function identifySetext($Line, array $Block = null)
+    {
+        if ( ! isset($Block) or isset($Block['type']) or isset($Block['interrupted']))
+        {
+            return;
+        }
+
+        if (chop($Line['text'], $Line['text'][0]) === '')
+        {
+            $Block['element']['name'] = $Line['text'][0] === '=' ? 'h1' : 'h2';
+
+            return $Block;
+        }
+    }
+
+    #
+    # Markup
+
+    protected function identifyMarkup($Line)
+    {
+        if ($this->markupEscaped)
+        {
+            return;
+        }
+
+        if (preg_match('/^<(\w[\w\d]*)(?:[ ][^>]*)?(\/?)[ ]*>/', $Line['text'], $matches))
+        {
+            if (in_array($matches[1], $this->textLevelElements))
+            {
+                return;
+            }
+
+            $Block = array(
+                'element' => $Line['body'],
+            );
+
+            if ($matches[2] or $matches[1] === 'hr' or preg_match('/<\/'.$matches[1].'>[ ]*$/', $Line['text']))
+            {
+                $Block['closed'] = true;
+            }
+            else
+            {
+                $Block['depth'] = 0;
+                $Block['name'] = $matches[1];
+            }
+
+            return $Block;
+        }
+    }
+
+    protected function addToMarkup($Line, array $Block)
+    {
+        if (isset($Block['closed']))
+        {
+            return;
+        }
+
+        if (preg_match('/<'.$Block['name'].'([ ][^\/]+)?>/', $Line['text'])) # opening tag
+        {
+            $Block['depth'] ++;
+        }
+
+        if (stripos($Line['text'], '</'.$Block['name'].'>') !== false) # closing tag
+        {
+            if ($Block['depth'] > 0)
+            {
+                $Block['depth'] --;
+            }
+            else
+            {
+                $Block['closed'] = true;
+            }
+        }
+
+        $Block['element'] .= "\n".$Line['body'];
+
+        return $Block;
+    }
+
+    #
+    # Table
+
+    protected function identifyTable($Line, array $Block = null)
+    {
+        if ( ! isset($Block) or isset($Block['type']) or isset($Block['interrupted']))
+        {
+            return;
+        }
+
+        if (strpos($Block['element']['text'], '|') !== false and chop($Line['text'], ' -:|') === '')
+        {
+            $alignments = array();
+
+            $divider = $Line['text'];
+
+            $divider = trim($divider);
+            $divider = trim($divider, '|');
+
+            $dividerCells = explode('|', $divider);
+
+            foreach ($dividerCells as $dividerCell)
+            {
+                $dividerCell = trim($dividerCell);
+
+                if ($dividerCell === '')
+                {
+                    continue;
+                }
+
+                $alignment = null;
+
+                if ($dividerCell[0] === ':')
+                {
+                    $alignment = 'left';
+                }
+
+                if (substr($dividerCell, -1) === ':')
+                {
+                    $alignment = $alignment === 'left' ? 'center' : 'right';
+                }
+
+                $alignments []= $alignment;
+            }
+
+            # ~
+
+            $HeaderElements = array();
+
+            $header = $Block['element']['text'];
+
+            $header = trim($header);
+            $header = trim($header, '|');
+
+            $headerCells = explode('|', $header);
+
+            foreach ($headerCells as $index => $headerCell)
+            {
+                $headerCell = trim($headerCell);
+
+                $HeaderElement = array(
+                    'name' => 'th',
+                    'text' => $headerCell,
+                    'handler' => 'line',
+                );
+
+                if (isset($alignments[$index]))
+                {
+                    $alignment = $alignments[$index];
+
+                    $HeaderElement['attributes'] = array(
+                        'align' => $alignment,
+                    );
+                }
+
+                $HeaderElements []= $HeaderElement;
+            }
+
+            # ~
+
+            $Block = array(
+                'alignments' => $alignments,
+                'identified' => true,
+                'element' => array(
+                    'name' => 'table',
+                    'handler' => 'elements',
+                ),
+            );
+
+            $Block['element']['text'] []= array(
+                'name' => 'thead',
+                'handler' => 'elements',
+            );
+
+            $Block['element']['text'] []= array(
+                'name' => 'tbody',
+                'handler' => 'elements',
+                'text' => array(),
+            );
+
+            $Block['element']['text'][0]['text'] []= array(
+                'name' => 'tr',
+                'handler' => 'elements',
+                'text' => $HeaderElements,
+            );
+
+            return $Block;
+        }
+    }
+
+    protected function addToTable($Line, array $Block)
+    {
+        if ($Line['text'][0] === '|' or strpos($Line['text'], '|'))
+        {
+            $Elements = array();
+
+            $row = $Line['text'];
+
+            $row = trim($row);
+            $row = trim($row, '|');
+
+            $cells = explode('|', $row);
+
+            foreach ($cells as $index => $cell)
+            {
+                $cell = trim($cell);
+
+                $Element = array(
+                    'name' => 'td',
+                    'handler' => 'line',
+                    'text' => $cell,
+                );
+
+                if (isset($Block['alignments'][$index]))
+                {
+                    $Element['attributes'] = array(
+                        'align' => $Block['alignments'][$index],
+                    );
+                }
+
+                $Elements []= $Element;
+            }
+
+            $Element = array(
+                'name' => 'tr',
+                'handler' => 'elements',
+                'text' => $Elements,
+            );
+
+            $Block['element']['text'][1]['text'] []= $Element;
+
+            return $Block;
+        }
+    }
+
+    #
+    # Definitions
+    #
+
+    protected function identifyReference($Line)
+    {
+        if (preg_match('/^\[(.+?)\]:[ ]*<?(\S+?)>?(?:[ ]+["\'(](.+)["\')])?[ ]*$/', $Line['text'], $matches))
+        {
+            $Definition = array(
+                'id' => strtolower($matches[1]),
+                'data' => array(
+                    'url' => $matches[2],
+                ),
+            );
+
+            if (isset($matches[3]))
+            {
+                $Definition['data']['title'] = $matches[3];
+            }
+
+            return $Definition;
+        }
+    }
+
+    #
+    # ~
+    #
+
+    protected function buildParagraph($Line)
+    {
+        $Block = array(
+            'element' => array(
+                'name' => 'p',
+                'text' => $Line['text'],
+                'handler' => 'line',
+            ),
+        );
+
+        return $Block;
+    }
+
+    #
+    # ~
+    #
+
+    protected function element(array $Element)
+    {
+        $markup = '<'.$Element['name'];
+
+        if (isset($Element['attributes']))
+        {
+            foreach ($Element['attributes'] as $name => $value)
+            {
+                $markup .= ' '.$name.'="'.$value.'"';
+            }
+        }
+
+        if (isset($Element['text']))
+        {
+            $markup .= '>';
+
+            if (isset($Element['handler']))
+            {
+                $markup .= $this->$Element['handler']($Element['text']);
+            }
+            else
+            {
+                $markup .= $Element['text'];
+            }
+
+            $markup .= '</'.$Element['name'].'>';
+        }
+        else
+        {
+            $markup .= ' />';
+        }
+
+        return $markup;
+    }
+
+    protected function elements(array $Elements)
+    {
+        $markup = '';
+
+        foreach ($Elements as $Element)
+        {
+            if ($Element === null)
+            {
+                continue;
+            }
+
+            $markup .= "\n";
+
+            if (is_string($Element)) # because of Markup
+            {
+                $markup .= $Element;
+
+                continue;
+            }
+
+            $markup .= $this->element($Element);
+        }
+
+        $markup .= "\n";
+
+        return $markup;
+    }
+
+    #
+    # Spans
+    #
+
+    protected $SpanTypes = array(
+        '!' => array('Link'), # ?
+        '&' => array('Ampersand'),
+        '*' => array('Emphasis'),
+        '/' => array('Url'),
+        '<' => array('UrlTag', 'EmailTag', 'Tag', 'LessThan'),
+        '[' => array('Link'),
+        '_' => array('Emphasis'),
+        '`' => array('InlineCode'),
+        '~' => array('Strikethrough'),
+        '\\' => array('EscapeSequence'),
+    );
+
+    # ~
+
+    protected $spanMarkerList = '*_!&[</`~\\';
+
+    #
+    # ~
+    #
+
+    public function line($text)
+    {
+        $markup = '';
+
+        $remainder = $text;
+
+        $markerPosition = 0;
+
+        while ($excerpt = strpbrk($remainder, $this->spanMarkerList))
+        {
+            $marker = $excerpt[0];
+
+            $markerPosition += strpos($remainder, $marker);
+
+            $Excerpt = array('text' => $excerpt, 'context' => $text);
+
+            foreach ($this->SpanTypes[$marker] as $spanType)
+            {
+                $handler = 'identify'.$spanType;
+
+                $Span = $this->$handler($Excerpt);
+
+                if ( ! isset($Span))
+                {
+                    continue;
+                }
+
+                # The identified span can be ahead of the marker.
+
+                if (isset($Span['position']) and $Span['position'] > $markerPosition)
+                {
+                    continue;
+                }
+
+                # Spans that start at the position of their marker don't have to set a position.
+
+                if ( ! isset($Span['position']))
+                {
+                    $Span['position'] = $markerPosition;
+                }
+
+                $plainText = substr($text, 0, $Span['position']);
+
+                $markup .= $this->readPlainText($plainText);
+
+                $markup .= isset($Span['markup']) ? $Span['markup'] : $this->element($Span['element']);
+
+                $text = substr($text, $Span['position'] + $Span['extent']);
+
+                $remainder = $text;
+
+                $markerPosition = 0;
+
+                continue 2;
+            }
+
+            $remainder = substr($excerpt, 1);
+
+            $markerPosition ++;
+        }
+
+        $markup .= $this->readPlainText($text);
+
+        return $markup;
+    }
+
+    #
+    # ~
+    #
+
+    protected function identifyUrl($Excerpt)
+    {
+        if ( ! isset($Excerpt['text'][1]) or $Excerpt['text'][1] !== '/')
+        {
+            return;
+        }
+
+        if (preg_match('/\bhttps?:[\/]{2}[^\s<]+\b\/*/ui', $Excerpt['context'], $matches, PREG_OFFSET_CAPTURE))
+        {
+            $url = str_replace(array('&', '<'), array('&amp;', '&lt;'), $matches[0][0]);
+
+            return array(
+                'extent' => strlen($matches[0][0]),
+                'position' => $matches[0][1],
+                'element' => array(
+                    'name' => 'a',
+                    'text' => $url,
+                    'attributes' => array(
+                        'href' => $url,
+                    ),
+                ),
+            );
+        }
+    }
+
+    protected function identifyAmpersand($Excerpt)
+    {
+        if ( ! preg_match('/^&#?\w+;/', $Excerpt['text']))
+        {
+            return array(
+                'markup' => '&amp;',
+                'extent' => 1,
+            );
+        }
+    }
+
+    protected function identifyStrikethrough($Excerpt)
+    {
+        if ( ! isset($Excerpt['text'][1]))
+        {
+            return;
+        }
+
+        if ($Excerpt['text'][1] === '~' and preg_match('/^~~(?=\S)(.+?)(?<=\S)~~/', $Excerpt['text'], $matches))
+        {
+            return array(
+                'extent' => strlen($matches[0]),
+                'element' => array(
+                    'name' => 'del',
+                    'text' => $matches[1],
+                    'handler' => 'line',
+                ),
+            );
+        }
+    }
+
+    protected function identifyEscapeSequence($Excerpt)
+    {
+        if (isset($Excerpt['text'][1]) and in_array($Excerpt['text'][1], $this->specialCharacters))
+        {
+            return array(
+                'markup' => $Excerpt['text'][1],
+                'extent' => 2,
+            );
+        }
+    }
+
+    protected function identifyLessThan()
+    {
+        return array(
+            'markup' => '&lt;',
+            'extent' => 1,
+        );
+    }
+
+    protected function identifyUrlTag($Excerpt)
+    {
+        if (strpos($Excerpt['text'], '>') !== false and preg_match('/^<(https?:[\/]{2}[^\s]+?)>/i', $Excerpt['text'], $matches))
+        {
+            $url = str_replace(array('&', '<'), array('&amp;', '&lt;'), $matches[1]);
+
+            return array(
+                'extent' => strlen($matches[0]),
+                'element' => array(
+                    'name' => 'a',
+                    'text' => $url,
+                    'attributes' => array(
+                        'href' => $url,
+                    ),
+                ),
+            );
+        }
+    }
+
+    protected function identifyEmailTag($Excerpt)
+    {
+        if (strpos($Excerpt['text'], '>') !== false and preg_match('/^<(\S+?@\S+?)>/', $Excerpt['text'], $matches))
+        {
+            return array(
+                'extent' => strlen($matches[0]),
+                'element' => array(
+                    'name' => 'a',
+                    'text' => $matches[1],
+                    'attributes' => array(
+                        'href' => 'mailto:'.$matches[1],
+                    ),
+                ),
+            );
+        }
+    }
+
+    protected function identifyTag($Excerpt)
+    {
+        if ($this->markupEscaped)
+        {
+            return;
+        }
+
+        if (strpos($Excerpt['text'], '>') !== false and preg_match('/^<\/?\w.*?>/', $Excerpt['text'], $matches))
+        {
+            return array(
+                'markup' => $matches[0],
+                'extent' => strlen($matches[0]),
+            );
+        }
+    }
+
+    protected function identifyInlineCode($Excerpt)
+    {
+        $marker = $Excerpt['text'][0];
+
+        if (preg_match('/^('.$marker.'+)[ ]*(.+?)[ ]*(?<!'.$marker.')\1(?!'.$marker.')/', $Excerpt['text'], $matches))
+        {
+            $text = $matches[2];
+            $text = htmlspecialchars($text, ENT_NOQUOTES, 'UTF-8');
+
+            return array(
+                'extent' => strlen($matches[0]),
+                'element' => array(
+                    'name' => 'code',
+                    'text' => $text,
+                ),
+            );
+        }
+    }
+
+    protected function identifyLink($Excerpt)
+    {
+        $extent = $Excerpt['text'][0] === '!' ? 1 : 0;
+
+        if (strpos($Excerpt['text'], ']') and preg_match('/\[((?:[^][]|(?R))*)\]/', $Excerpt['text'], $matches))
+        {
+            $Link = array('text' => $matches[1], 'label' => strtolower($matches[1]));
+
+            $extent += strlen($matches[0]);
+
+            $substring = substr($Excerpt['text'], $extent);
+
+            if (preg_match('/^\s*\[([^][]+)\]/', $substring, $matches))
+            {
+                $Link['label'] = strtolower($matches[1]);
+
+                if (isset($this->Definitions['Reference'][$Link['label']]))
+                {
+                    $Link += $this->Definitions['Reference'][$Link['label']];
+
+                    $extent += strlen($matches[0]);
+                }
+                else
+                {
+                    return;
+                }
+            }
+            elseif (isset($this->Definitions['Reference'][$Link['label']]))
+            {
+                $Link += $this->Definitions['Reference'][$Link['label']];
+
+                if (preg_match('/^[ ]*\[\]/', $substring, $matches))
+                {
+                    $extent += strlen($matches[0]);
+                }
+            }
+            elseif (preg_match('/^\([ ]*(.*?)(?:[ ]+[\'"](.+?)[\'"])?[ ]*\)/', $substring, $matches))
+            {
+                $Link['url'] = $matches[1];
+
+                if (isset($matches[2]))
+                {
+                    $Link['title'] = $matches[2];
+                }
+
+                $extent += strlen($matches[0]);
+            }
+            else
+            {
+                return;
+            }
+        }
+        else
+        {
+            return;
+        }
+
+        $url = str_replace(array('&', '<'), array('&amp;', '&lt;'), $Link['url']);
+
+        if ($Excerpt['text'][0] === '!')
+        {
+            $Element = array(
+                'name' => 'img',
+                'attributes' => array(
+                    'alt' => $Link['text'],
+                    'src' => $url,
+                ),
+            );
+        }
+        else
+        {
+            $Element = array(
+                'name' => 'a',
+                'handler' => 'line',
+                'text' => $Link['text'],
+                'attributes' => array(
+                    'href' => $url,
+                ),
+            );
+        }
+
+        if (isset($Link['title']))
+        {
+            $Element['attributes']['title'] = $Link['title'];
+        }
+
+        return array(
+            'extent' => $extent,
+            'element' => $Element,
+        );
+    }
+
+    protected function identifyEmphasis($Excerpt)
+    {
+        if ( ! isset($Excerpt['text'][1]))
+        {
+            return;
+        }
+
+        $marker = $Excerpt['text'][0];
+
+        if ($Excerpt['text'][1] === $marker and preg_match($this->StrongRegex[$marker], $Excerpt['text'], $matches))
+        {
+            $emphasis = 'strong';
+        }
+        elseif (preg_match($this->EmRegex[$marker], $Excerpt['text'], $matches))
+        {
+            $emphasis = 'em';
+        }
+        else
+        {
+            return;
+        }
+
+        return array(
+            'extent' => strlen($matches[0]),
+            'element' => array(
+                'name' => $emphasis,
+                'handler' => 'line',
+                'text' => $matches[1],
+            ),
+        );
+    }
+
+    #
+    # ~
+
+    protected function readPlainText($text)
+    {
+        $breakMarker = $this->breaksEnabled ? "\n" : "  \n";
+
+        $text = str_replace($breakMarker, "<br />\n", $text);
+
+        return $text;
+    }
+
+    #
+    # ~
+    #
+
+    protected function li($lines)
+    {
+        $markup = $this->lines($lines);
+
+        $trimmedMarkup = trim($markup);
+
+        if ( ! in_array('', $lines) and substr($trimmedMarkup, 0, 3) === '<p>')
+        {
+            $markup = $trimmedMarkup;
+            $markup = substr($markup, 3);
+
+            $position = strpos($markup, "</p>");
+
+            $markup = substr_replace($markup, '', $position, 4);
+        }
+
+        return $markup;
+    }
+
+    #
+    # Multiton
+    #
+
+    static function instance($name = 'default')
+    {
+        if (isset(self::$instances[$name]))
+        {
+            return self::$instances[$name];
+        }
+
+        $instance = new self();
+
+        self::$instances[$name] = $instance;
+
+        return $instance;
+    }
+
+    private static $instances = array();
+
+    #
+    # Deprecated Methods
+    #
+
+    /**
+     * @deprecated in favor of "text"
+     */
+    function parse($text)
+    {
+        $markup = $this->text($text);
+
+        return $markup;
+    }
+
+    #
+    # Fields
+    #
+
+    protected $Definitions;
+
+    #
+    # Read-only
+
+    protected $specialCharacters = array(
+        '\\', '`', '*', '_', '{', '}', '[', ']', '(', ')', '>', '#', '+', '-', '.', '!',
+    );
+
+    protected $StrongRegex = array(
+        '*' => '/^[*]{2}((?:[^*]|[*][^*]*[*])+?)[*]{2}(?![*])/s',
+        '_' => '/^__((?:[^_]|_[^_]*_)+?)__(?!_)/us',
+    );
+
+    protected $EmRegex = array(
+        '*' => '/^[*]((?:[^*]|[*][*][^*]+?[*][*])+?)[*](?![*])/s',
+        '_' => '/^_((?:[^_]|__[^_]*__)+?)_(?!_)\b/us',
+    );
+
+    protected $textLevelElements = array(
+        'a', 'br', 'bdo', 'abbr', 'blink', 'nextid', 'acronym', 'basefont',
+        'b', 'em', 'big', 'cite', 'small', 'spacer', 'listing',
+        'i', 'rp', 'del', 'code',          'strike', 'marquee',
+        'q', 'rt', 'ins', 'font',          'strong',
+        's', 'tt', 'sub', 'mark',
+        'u', 'xm', 'sup', 'nobr',
+                   'var', 'ruby',
+                   'wbr', 'span',
+                          'time',
+    );
+}