commit bdcd08b467e5774e92f34252d6caee8db370d9c5
Author: Michel Fortin <michel.fortin@michelf.com>
Date:   Tue Aug 14 16:11:03 2007 -0400

    Base for Object-Oriented PHP Markdown

diff --git a/License.text b/License.text
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+++ b/License.text
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+Copyright (c) 2004-2005, John Gruber  
+<http://daringfireball.net/>  
+All rights reserved.
+
+Copyright (c) 2004-2006, Michel Fortin  
+<http://www.michelf.com/>  
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+* Redistributions of source code must retain the above copyright notice,
+  this list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright
+  notice, this list of conditions and the following disclaimer in the
+  documentation and/or other materials provided with the distribution.
+
+* Neither the name "Markdown" nor the names of its contributors may
+  be used to endorse or promote products derived from this software
+  without specific prior written permission.
+
+This software is provided by the copyright holders and contributors "as
+is" and any express or implied warranties, including, but not limited
+to, the implied warranties of merchantability and fitness for a
+particular purpose are disclaimed. In no event shall the copyright owner
+or contributors be liable for any direct, indirect, incidental, special,
+exemplary, or consequential damages (including, but not limited to,
+procurement of substitute goods or services; loss of use, data, or
+profits; or business interruption) however caused and on any theory of
+liability, whether in contract, strict liability, or tort (including
+negligence or otherwise) arising in any way out of the use of this
+software, even if advised of the possibility of such damage.
diff --git a/PHP Markdown Readme.text b/PHP Markdown Readme.text
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+++ b/PHP Markdown Readme.text	
@@ -0,0 +1,478 @@
+PHP Markdown
+============
+
+Version 1.0.1oo - Fri 19 May 2006
+
+by Michel Fortin
+<http://www.michelf.com/>
+
+based on work by John Gruber  
+<http://daringfireball.net/>
+
+
+Introduction
+------------
+
+Markdown is a text-to-HTML conversion tool for web writers. Markdown
+allows you to write using an easy-to-read, easy-to-write plain text
+format, then convert it to structurally valid XHTML (or HTML).
+
+"Markdown" is two things: a plain text markup syntax, and a software 
+tool, written in Perl, that converts the plain text markup to HTML. 
+PHP Markdown is a port to PHP of the original Markdown program by 
+John Gruber.
+
+PHP Markdown can work as a plug-in for WordPress and bBlog, as a 
+modifier for the Smarty templating engine, or as a remplacement for
+textile formatting in any software that support textile.
+
+Full documentation of Markdown's syntax is available on John's 
+Markdown page: <http://daringfireball.net/projects/markdown/>
+
+
+Installation and Requirement
+----------------------------
+
+PHP Markdown requires PHP version 4.0.5 or later.
+
+
+### WordPress ###
+
+PHP Markdown works with [WordPress][wp], version 1.2 or later. 
+PHP Markdown is already bundled with WordPress. Still, you can find 
+here the latest version that may be newer than the latest WordPress 
+version.
+
+ [wp]: http://wordpress.org/
+
+1.  To use PHP Markdown with WordPress, place the "makrdown.php" file 
+    in the "plugins" folder. This folder is located inside 
+    "wp-content" at the root of your site:
+
+        (site home)/wp-content/plugins/
+
+2.  Activate the plugin with the administrative interface of 
+    WordPress. In the "Plugins" section you will now find Markdown. 
+    To activate the plugin, click on the "Activate" button on the 
+    same line than Markdown. Your entries will now be formatted by 
+    PHP Markdown.
+
+You can configure PHP Markdown to not apply to the comments on your 
+WordPress weblog. See the "Configuration" section below.
+
+Note: It is not possible at this time to apply a different set of 
+filters to different entries. All your entries will be formated by 
+PHP Markdown. This is currently a limitation of WordPress. If your old 
+entries are written in HTML (as opposed to another formatting syntax), 
+your site should not suffer much from installing PHP Markdown.
+
+
+### bBlog ###
+
+PHP Markdown also works with the latest version of [bBlog][bb].
+
+ [bb]: http://www.bblog.com/
+
+1.  To use PHP Markdown with bBlog, rename "markdown.php" to 
+    "modifier.markdown.php" and place the file in the "bBlog_plugins" 
+    folder. This folder is located inside the "bblog" directory of 
+    your site, like this:
+
+        (site home)/bblog/bBlog_plugins/modifier.markdown.php
+
+2.  Select "Markdown" as the "Entry Modifier" when you post a new 
+    entry. This setting will only apply to the entry you are editing.
+
+
+### Replacing Textile ###
+
+Many web programs written in PHP use [Textile][tx] to format your text. 
+To use PHP Markdown with these programs without having to change the 
+code, you can use PHP Markdown in "Textile Compatibility Mode."
+
+ [tx]: http://www.textism.com/tools/textile/
+
+1.  Rename the "markdown.php" file to "classTextile.php".
+
+2.  Locate the "classTextile.php" file hidden somewhere inside the 
+    installation of your program (see table below). Replace it with 
+    the PHP Markdown file you just renamed.
+
+As an helper, here you can learn where is the "classTextile.php" file 
+in some web programs:
+
+    Program       Location
+    ----------------------------------------------------------------
+    TextPattern   (site home)/textpattern/lib/classTextile.php
+    Pivot         (site home)/pivot/includes/textile/classtextile.php
+
+Contrary to Textile, Markdown does not convert quotes to curly ones 
+and does not convert multiple hyphens (`--` and `---`) into en- and 
+em-dashes. If you use PHP Markdown in Textile Compatibility Mode, you 
+can solve this problem by installing the "smartypants.php" file from 
+[PHP SmartyPants][psp] beside the "classTextile.php" file. The Textile 
+Compatibility Mode function will use SmartyPants automatically without 
+further modification.
+
+ [psp]: http://www.michelf.com/projects/php-smartypants/
+
+
+### In Your Own Programs ###
+
+You can use PHP Markdown easily in your current PHP program. Simply 
+include the file and then call the Markdown function on the text you 
+want to convert:
+
+    include_once "markdown.php";
+    $my_html = Markdown($my_text);
+
+If you wish to use PHP Markdown with another text filter function 
+built to parse HTML, you should filter the text *after* the Markdown
+function call. This is an example with [PHP SmartyPants][psp]:
+
+    $my_html = SmartyPants(Markdown($my_text));
+
+
+### With Smarty ###
+
+If your program use the [Smarty][sm] template engine, PHP Markdown 
+can now be used as a modifier for your templates. Rename "markdown.php" 
+to "modifier.markdown.php" and put it in your smarty plugins folder.
+
+  [sm]: http://smarty.php.net/
+
+If you are using MovableType 3.1 or later, the Smarty plugin folder is 
+located at `(MT CGI root)/php/extlib/smarty/plugins`. This will allow 
+Markdown to work on dynamic pages.
+
+
+Configuration
+-------------
+
+By default, PHP Markdown produces XHTML output for tags with empty 
+elements. E.g.:
+
+    <br />
+
+Markdown can be configured to produce HTML-style tags; e.g.:
+
+    <br>
+
+To do this, you  must edit the "$md_empty_element_suffix" variable
+below the "Global default settings" header at the start of the
+"markdown.php" file.
+
+
+### WordPress-Specific Settings ###
+
+By default, the Markdown plugin applies to both posts and comments on 
+your WordPress weblog. To deactivate one or the other, edit the 
+`$md_wp_posts` or `$md_wp_comments` variable under the "WordPress 
+settings" header at the start of the "markdown.php" file.
+
+
+Bugs
+----
+
+To file bug reports please send email to:
+<michel.fortin@michelf.com>
+
+Please include with your report: (1) the example input; (2) the output you
+expected; (3) the output PHP Markdown actually produced.
+
+
+Version History
+---------------
+
+1.0.1oo (19 May 2006)
+
+*   Converted PHP Markdown to a object-oriented design.
+
+
+1.0.1c (9 Dec 2005)
+
+*	Fixed a problem occurring with PHP 5.1.1 due to a small 
+	change to strings variable replacement behaviour in 
+	this version.
+
+
+1.0.1b (6 Jun 2005)
+
+*	Fixed a bug where an inline image followed by a reference link would
+	give a completely wrong result.
+
+*	Fix for escaped backticks still triggering code spans:
+	
+		There are two raw backticks here: \` and here: \`, not a code span
+
+*	Fix for an ordered list following an unordered list, and the 
+	reverse. There is now a loop in _DoList that does the two 
+	separately.
+
+*	Fix for nested sub-lists in list-paragraph mode. Previously we got
+	a spurious extra level of `<p>` tags for something like this:
+
+		*	this
+		
+			*	sub
+		
+			that
+
+*	Fixed some incorrect behaviour with emphasis. This will now work
+	as it should:
+
+		*test **thing***  
+		**test *thing***  
+		***thing* test**  
+		***thing** test*
+
+		Name: __________  
+		Address: _______
+
+*	Correct a small bug in `_TokenizeHTML` where a Doctype declaration
+	was not seen as HTML.
+
+*	Major rewrite of the WordPress integration code that should 
+	correct many problems by preventing default WordPress filters from 
+	tampering with Markdown-formatted text. More details here:
+	<http://www.michelf.com/weblog/2005/wordpress-text-flow-vs-markdown/>
+
+*	Added a configuration variable for WordPress that can disable the 
+	Markdown filter on comments.
+
+
+1.0.1a (15 Apr 2005)
+
+*	Fixed an issue where PHP warnings were trigged when converting
+	text with list items running on PHP 4.0.6. This was comming from 
+	the `rtrim` function which did not support the second argument 
+	prior version 4.1. Replaced by a regular expression.
+
+*	Markdown now filter correctly post excerpts and comment
+	excerpts in WordPress.
+
+*	Automatic links and some code sample were "corrected" by 
+	the balenceTag filter in WordPress meant to ensure HTML
+	is well formed. This new version of PHP Markdown postpone this
+	filter so that it runs after Markdown.
+
+*	Blockquote syntax and some code sample were stripped by 
+	a new WordPress 1.5 filter meant to remove unwanted HTML 
+	in comments. This new version of PHP Markdown postpone this
+	filter so that it runs after Markdown.
+
+
+1.0.2b1 (5 Mar 2005)
+
+*	Fix for backticks within HTML tag:
+
+		<span attr='`ticks`'>like this</span>
+
+*	Fix for escaped backticks still triggering code spans:
+	
+		There are two raw backticks here: \` and here: \`, not a code span
+
+*	Improved integration with WordPress. With WordPress 1.5, the 
+	balenceTags filter now runs after Markdown, so it won't 
+	interfere anymore. You can still disable balanceTags from the admin 
+	interface (in Options > Writing) if you want to.
+	
+*	PHP Markdown now correctly filter text for excerpts in WordPress. 
+	There is still one glitch: autolinks and tags in code samples are 
+	stripped by WordPress when trimming it. A fix for this is possible 
+	with WordPress 1.5, but would require duplicating WordPress entry 
+	trimming code within Markdown, which I can't do because of a license 
+	issue. (Nor do I think it is a good solution to fix this.)
+
+*	Improved Textile compatibility mode. Markdown will now honor the
+	no-image and the lite parameters. In lite mode, no header, blockquote, 
+	list, or code block will be made, and inline HTML is limited
+	to the following tags:
+		
+		<a><i><b><em><strong><sup><sub><code><img><cite><ins><del>
+
+	This is acheived by backslash-escaping block markers before sending
+	text through the Markdown filter.
+	
+	The improved Textile comatibility means that the Markdown syntax will now 
+	be processed for comments in TextPattern (only for span elements due to 
+	TextPattern using the lite mode for comments). Sadly, due to TextPattern 
+	tag stripping, sample code in code span and auto-links will be stripped 
+	before the Markdown filter can see them. So I guess I should say it 
+	half-work for comments TextPattern.
+
+
+1.0.1 (16 Dec 2004):
+
+*	Changed the syntax rules for code blocks and spans. Previously,
+	backslash escapes for special Markdown characters were processed
+	everywhere other than within inline HTML tags. Now, the contents of
+	code blocks and spans are no longer processed for backslash escapes.
+	This means that code blocks and spans are now treated literally,
+	with no special rules to worry about regarding backslashes.
+
+	**IMPORTANT**: This breaks the syntax from all previous versions of
+	Markdown. Code blocks and spans involving backslash characters will
+	now generate different output than before.
+
+	Implementation-wise, this change was made by moving the call to
+	`_EscapeSpecialChars()` from the top-level `Markdown()` function to
+	within `_RunSpanGamut()`.
+
+*	Significants performance improvement in `_DoHeader`, `_Detab`
+	and `_TokenizeHTML`.
+
+*	Added `>`, `+`, and `-` to the list of backslash-escapable
+	characters. These should have been done when these characters
+	were added as unordered list item markers.
+
+*	Inline links using `<` and `>` URL delimiters weren't working:
+
+		like [this](<http://example.com/>)
+
+	Fixed by moving `_DoAutoLinks()` after `_DoAnchors()` in
+	`_RunSpanGamut()`.
+
+*	Fixed bug where auto-links were being processed within code spans:
+
+		like this: `<http://example.com/>`
+
+	Fixed by moving `_DoAutoLinks()` from `_RunBlockGamut()` to
+	`_RunSpanGamut()`.
+
+*	Sort-of fixed a bug where lines in the middle of hard-wrapped
+	paragraphs, which lines look like the start of a list item,
+	would accidentally trigger the creation of a list. E.g. a
+	paragraph that looked like this:
+
+		I recommend upgrading to version
+		8. Oops, now this line is treated
+		as a sub-list.
+
+	This is fixed for top-level lists, but it can still happen for
+	sub-lists. E.g., the following list item will not be parsed
+	properly:
+
+		*	I recommend upgrading to version
+			8. Oops, now this line is treated
+			as a sub-list.
+
+	Given Markdown's list-creation rules, I'm not sure this can
+	be fixed.
+
+*	Fix for horizontal rules preceded by 2 or 3 spaces or followed by
+	trailing spaces and tabs.
+
+*	Standalone HTML comments are now handled; previously, they'd get
+	wrapped in a spurious `<p>` tag.
+
+*	`_HashHTMLBlocks()` now tolerates trailing spaces and tabs following
+	HTML comments and `<hr/>` tags.
+
+*	Changed special case pattern for hashing `<hr>` tags in
+	`_HashHTMLBlocks()` so that they must occur within three spaces
+	of left margin. (With 4 spaces or a tab, they should be
+	code blocks, but weren't before this fix.)
+
+*	Auto-linked email address can now optionally contain
+	a 'mailto:' protocol. I.e. these are equivalent:
+
+		<mailto:user@example.com>
+		<user@example.com>
+
+*	Fixed annoying bug where nested lists would wind up with
+	spurious (and invalid) `<p>` tags.
+
+*	Changed `_StripLinkDefinitions()` so that link definitions must
+	occur within three spaces of the left margin. Thus if you indent
+	a link definition by four spaces or a tab, it will now be a code
+	block.
+
+*	You can now write empty links:
+
+		[like this]()
+
+	and they'll be turned into anchor tags with empty href attributes.
+	This should have worked before, but didn't.
+
+*	`***this***` and `___this___` are now turned into
+
+		<strong><em>this</em></strong>
+
+	Instead of
+
+		<strong><em>this</strong></em>
+
+	which isn't valid.
+
+*	Fixed problem for links defined with urls that include parens, e.g.:
+
+		[1]: http://sources.wikipedia.org/wiki/Middle_East_Policy_(Chomsky)
+
+	"Chomsky" was being erroneously treated as the URL's title.
+
+*	Double quotes in the title of an inline link used to give strange 
+	results (incorrectly made entities). Fixed.
+
+*	Tabs are now correctly changed into spaces. Previously, only 
+	the first tab was converted. In code blocks, the second one was too,
+	but was not always correctly aligned.
+
+*	Fixed a bug where a tab character inserted after a quote on the same
+	line could add a slash before the quotes.
+
+		This is "before"	[tab] and "after" a tab.
+
+	Previously gave this result:
+
+		<p>This is \"before\"  [tab] and "after" a tab.</p>
+
+*	Removed a call to `htmlentities`. This fixes a bug where multibyte
+	characters present in the title of a link reference could lead to
+	invalid utf-8 characters. 
+
+*	Changed a regular expression in `_TokenizeHTML` that could lead to
+	a segmentation fault with PHP 4.3.8 on Linux.
+
+*	Fixed some notices that could show up if PHP error reporting 
+	E_NOTICE flag was set.
+
+
+Copyright and License
+---------------------
+
+Copyright (c) 2004-2006 Michel Fortin  
+<http://www.michelf.com/>  
+All rights reserved.
+
+Based on Markdown  
+Copyright (c) 2003-2005 John Gruber   
+<http://daringfireball.net/>   
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+*   Redistributions of source code must retain the above copyright notice,
+    this list of conditions and the following disclaimer.
+
+*   Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+
+*   Neither the name "Markdown" nor the names of its contributors may
+    be used to endorse or promote products derived from this software
+    without specific prior written permission.
+
+This software is provided by the copyright holders and contributors "as
+is" and any express or implied warranties, including, but not limited
+to, the implied warranties of merchantability and fitness for a
+particular purpose are disclaimed. In no event shall the copyright owner
+or contributors be liable for any direct, indirect, incidental, special,
+exemplary, or consequential damages (including, but not limited to,
+procurement of substitute goods or services; loss of use, data, or
+profits; or business interruption) however caused and on any theory of
+liability, whether in contract, strict liability, or tort (including
+negligence or otherwise) arising in any way out of the use of this
+software, even if advised of the possibility of such damage.
diff --git a/markdown.php b/markdown.php
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index 0000000..426e7fc
--- /dev/null
+++ b/markdown.php
@@ -0,0 +1,1412 @@
+<?php
+#
+# Markdown  -  A text-to-HTML conversion tool for web writers
+#
+# PHP Markdown
+# Copyright (c) 2004-2006 Michel Fortin  
+# <http://www.michelf.com/projects/php-markdown/>
+#
+# Original Markdown
+# Copyright (c) 2004-2005 John Gruber  
+# <http://daringfireball.net/projects/markdown/>
+#
+
+
+define( 'MARKDOWN_VERSION',  "1.0.1oo" ); # Fri 19 May 2006
+
+
+#
+# Global default settings:
+#
+
+# Change to ">" for HTML output
+define( 'MARKDOWN_EMPTY_ELEMENT_SUFFIX',  " />");
+
+# Define the width of a tab for code blocks.
+define( 'MARKDOWN_TAB_WIDTH',     4 );
+
+
+#
+# WordPress settings:
+#
+
+# Change to false to remove Markdown from posts and/or comments.
+define( 'MARKDOWN_WP_POSTS',      true );
+define( 'MARKDOWN_WP_COMMENTS',   true );
+
+
+
+### Standard Function Interface ###
+
+define( 'MARKDOWN_PARSER_CLASS',  'Markdown_Parser' );
+
+function Markdown($text) {
+#
+# Initialize the parser and return the result of its transform method.
+#
+	# Setup static parser variable.
+	static $parser;
+	if (!isset($parser)) {
+		$parser_class = MARKDOWN_PARSER_CLASS;
+		$parser = new $parser_class;
+	}
+
+	# Transform text using parser.
+	return $parser->transform($text);
+}
+
+
+### WordPress Plugin Interface ###
+
+/*
+Plugin Name: Markdown
+Plugin URI: http://www.michelf.com/projects/php-markdown/
+Description: <a href="http://daringfireball.net/projects/markdown/syntax">Markdown syntax</a> allows you to write using an easy-to-read, easy-to-write plain text format. Based on the original Perl version by <a href="http://daringfireball.net/">John Gruber</a>. <a href="http://www.michelf.com/projects/php-markdown/">More...</a>
+Version: 1.0.1oo
+Author: Michel Fortin
+Author URI: http://www.michelf.com/
+*/
+
+if (isset($wp_version)) {
+	# More details about how it works here:
+	# <http://www.michelf.com/weblog/2005/wordpress-text-flow-vs-markdown/>
+	
+	# Post content and excerpts
+	# - Remove WordPress paragraph generator.
+	# - Run Markdown on excerpt, then remove all tags.
+	# - Add paragraph tag around the excerpt, but remove it for the excerpt rss.
+	if (MARKDOWN_WP_POSTS) {
+		remove_filter('the_content',  'wpautop');
+		remove_filter('the_excerpt',  'wpautop');
+		add_filter('the_content',     'Markdown', 6);
+		add_filter('get_the_excerpt', 'Markdown', 6);
+		add_filter('get_the_excerpt', 'trim', 7);
+		add_filter('the_excerpt',     'mdwp_add_p');
+		add_filter('the_excerpt_rss', 'mdwp_strip_p');
+		
+		remove_filter('content_save_pre',  'balanceTags', 50);
+		remove_filter('excerpt_save_pre',  'balanceTags', 50);
+		add_filter('the_content',  	  'balanceTags', 50);
+		add_filter('get_the_excerpt', 'balanceTags', 9);
+	}
+	
+	# Comments
+	# - Remove WordPress paragraph generator.
+	# - Remove WordPress auto-link generator.
+	# - Scramble important tags before passing them to the kses filter.
+	# - Run Markdown on excerpt then remove paragraph tags.
+	if (MARKDOWN_WP_COMMENTS) {
+		remove_filter('comment_text', 'wpautop');
+		remove_filter('comment_text', 'make_clickable');
+		add_filter('pre_comment_content', 'Markdown', 6);
+		add_filter('pre_comment_content', 'mdwp_hide_tags', 8);
+		add_filter('pre_comment_content', 'mdwp_show_tags', 12);
+		add_filter('get_comment_text',    'Markdown', 6);
+		add_filter('get_comment_excerpt', 'Markdown', 6);
+		add_filter('get_comment_excerpt', 'mdwp_strip_p', 7);
+	
+		global $markdown_hidden_tags;
+		$markdown_hidden_tags = array(
+			'<p>'	=> md5('<p>'),		'</p>'	=> md5('</p>'),
+			'<pre>'	=> md5('<pre>'),	'</pre>'=> md5('</pre>'),
+			'<ol>'	=> md5('<ol>'),		'</ol>'	=> md5('</ol>'),
+			'<ul>'	=> md5('<ul>'),		'</ul>'	=> md5('</ul>'),
+			'<li>'	=> md5('<li>'),		'</li>'	=> md5('</li>'),
+			);
+	}
+	
+	function mdwp_add_p($text) {
+		if (strlen($text) == 0) return;
+		if (strcasecmp(substr($text, -3), '<p>') == 0) return $text;
+		return '<p>'.$text.'</p>';
+	}
+	
+	function mdwp_strip_p($t) { return preg_replace('{</?[pP]>}', '', $t); }
+
+	function mdwp_hide_tags($text) {
+		global $markdown_hidden_tags;
+		return str_replace(array_keys($markdown_hidden_tags), 
+							array_values($markdown_hidden_tags), $text);
+	}
+	function mdwp_show_tags($text) {
+		global $markdown_hidden_tags;
+		return str_replace(array_values($markdown_hidden_tags), 
+							array_keys($markdown_hidden_tags), $text);
+	}
+}
+
+
+### bBlog Plugin Info ###
+
+function identify_modifier_markdown() {
+	return array(
+		'name'			=> 'markdown',
+		'type'			=> 'modifier',
+		'nicename'		=> 'Markdown',
+		'description'	=> 'A text-to-HTML conversion tool for web writers',
+		'authors'		=> 'Michel Fortin and John Gruber',
+		'licence'		=> 'GPL',
+		'version'		=> MARKDOWN_VERSION,
+		'help'			=> '<a href="http://daringfireball.net/projects/markdown/syntax">Markdown syntax</a> allows you to write using an easy-to-read, easy-to-write plain text format. Based on the original Perl version by <a href="http://daringfireball.net/">John Gruber</a>. <a href="http://www.michelf.com/projects/php-markdown/">More...</a>'
+	);
+}
+
+
+### Smarty Modifier Interface ###
+
+function smarty_modifier_markdown($text) {
+	return Markdown($text);
+}
+
+
+### Textile Compatibility Mode ###
+
+# Rename this file to "classTextile.php" and it can replace Textile everywhere.
+
+if (strcasecmp(substr(__FILE__, -16), "classTextile.php") == 0) {
+	# Try to include PHP SmartyPants. Should be in the same directory.
+	@include_once 'smartypants.php';
+	# Fake Textile class. It calls Markdown instead.
+	class Textile {
+		function TextileThis($text, $lite='', $encode='') {
+			if ($lite == '' && $encode == '')    $text = Markdown($text);
+			if (function_exists('SmartyPants'))  $text = SmartyPants($text);
+			return $text;
+		}
+		# Workaround to ensure compatibility with TextPattern 4.0.3.
+		function blockLite($text) { return $text; }
+	}
+}
+
+
+
+#
+# Markdown Parser Class
+#
+
+class Markdown_Parser {
+
+	# Regex to match balanced [brackets].
+	# Needed to insert a maximum bracked depth while converting to PHP.
+	var $nested_brackets_depth = 6;
+	var $nested_brackets;
+
+	# Table of hash values for escaped characters:
+	var $escape_chars = '\`*_{}[]()>#+-.!';
+	var $escape_table = array();
+	var $backslash_escape_table = array();
+
+	# Change to ">" for HTML output.
+	var $empty_element_suffix = MARKDOWN_EMPTY_ELEMENT_SUFFIX;
+	var $tab_width = MARKDOWN_TAB_WIDTH;
+
+
+	function Markdown_Parser() {
+	#
+	# Constructor function. Initialize appropriate member variables.
+	#
+		$this->nested_brackets = 
+			str_repeat('(?>[^\[\]]+|\[', $this->nested_brackets_depth).
+			str_repeat('\])*', $this->nested_brackets_depth);
+		
+		# Create an identical table but for escaped characters.
+		foreach (preg_split('/(?!^|$)/', $this->escape_chars) as $char) {
+			$hash = md5($char);
+			$this->escape_table[$char] = $hash;
+			$this->backslash_escape_table["\\$char"] = $hash;
+		}
+	}
+
+
+	# Internal hashes used during transformation.
+	var $urls = array();
+	var $titles = array();
+	var $html_blocks = array();
+
+
+	function transform($text) {
+	#
+	# Main function. The order in which other subs are called here is
+	# essential. Link and image substitutions need to happen before
+	# _EscapeSpecialCharsWithinTagAttributes(), so that any *'s or _'s in the <a>
+	# and <img> tags get encoded.
+	#
+		# Clear the global hashes. If we don't clear these, you get conflicts
+		# from other articles when generating a page which contains more than
+		# one article (e.g. an index page that shows the N most recent
+		# articles):
+		$this->urls = array();
+		$this->titles = array();
+		$this->html_blocks = array();
+
+		# Standardize line endings:
+		#   DOS to Unix and Mac to Unix
+		$text = str_replace(array("\r\n", "\r"), "\n", $text);
+
+		# Make sure $text ends with a couple of newlines:
+		$text .= "\n\n";
+
+		# Convert all tabs to spaces.
+		$text = $this->detab($text);
+
+		# Strip any lines consisting only of spaces and tabs.
+		# This makes subsequent regexen easier to write, because we can
+		# match consecutive blank lines with /\n+/ instead of something
+		# contorted like /[ \t]*\n+/ .
+		$text = preg_replace('/^[ \t]+$/m', '', $text);
+
+		# Turn block-level HTML blocks into hash entries
+		$text = $this->hashHTMLBlocks($text);
+
+		# Strip link definitions, store in hashes.
+		$text = $this->stripLinkDefinitions($text);
+
+		$text = $this->runBlockGamut($text);
+
+		$text = $this->unescapeSpecialChars($text);
+
+		return $text . "\n";
+	}
+
+
+	function stripLinkDefinitions($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
+							  [ \t]*
+							  \n?				# maybe *one* newline
+							  [ \t]*
+							<?(\S+?)>?			# url = $2
+							  [ \t]*
+							  \n?				# maybe one newline
+							  [ \t]*
+							(?:
+								(?<=\s)			# lookbehind for whitespace
+								["(]
+								(.+?)			# title = $3
+								[")]
+								[ \t]*
+							)?	# title is optional
+							(?:\n+|\Z)
+			}xm',
+			array(&$this, '_stripLinkDefinitions_callback'),
+			$text);
+		return $text;
+	}
+	function _stripLinkDefinitions_callback($matches) {
+		$link_id = strtolower($matches[1]);
+		$this->urls[$link_id] = $this->encodeAmpsAndAngles($matches[2]);
+		if (isset($matches[3]))
+			$this->titles[$link_id] = str_replace('"', '&quot;', $matches[3]);
+		return ''; # String that will replace the block
+	}
+
+
+	function hashHTMLBlocks($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:
+		$block_tags_a = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|'.
+						'script|noscript|form|fieldset|iframe|math|ins|del';
+		$block_tags_b = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|'.
+						'script|noscript|form|fieldset|iframe|math';
+
+		# First, look for nested blocks, e.g.:
+		# 	<div>
+		# 		<div>
+		# 		tags for inner block must be indented.
+		# 		</div>
+		# 	</div>
+		#
+		# The outermost tags must start at the left margin for this to match, and
+		# the inner nested divs must be indented.
+		# We need to do this before the next, more liberal match, because the next
+		# match will start at the first `<div>` and stop at the first `</div>`.
+		$text = preg_replace_callback("{
+					(						# save in $1
+						^					# start of line  (with /m)
+						<($block_tags_a)	# start tag = $2
+						\\b					# word break
+						(.*\\n)*?			# any number of lines, minimally matching
+						</\\2>				# the matching end tag
+						[ \\t]*				# trailing spaces/tabs
+						(?=\\n+|\\Z)	# followed by a newline or end of document
+					)
+			}xm",
+			array(&$this, '_hashHTMLBlocks_callback'),
+			$text);
+
+		#
+		# Now match more liberally, simply from `\n<tag>` to `</tag>\n`
+		#
+		$text = preg_replace_callback("{
+					(						# save in $1
+						^					# start of line  (with /m)
+						<($block_tags_b)	# start tag = $2
+						\\b					# word break
+						(.*\\n)*?			# any number of lines, minimally matching
+						.*</\\2>				# the matching end tag
+						[ \\t]*				# trailing spaces/tabs
+						(?=\\n+|\\Z)	# followed by a newline or end of document
+					)
+			}xm",
+			array(&$this, '_hashHTMLBlocks_callback'),
+			$text);
+
+		# Special case just for <hr />. It was easier to make a special case than
+		# to make the other regex more complicated.
+		$text = preg_replace_callback('{
+					(?:
+						(?<=\n\n)		# Starting after a blank line
+						|				# or
+						\A\n?			# the beginning of the doc
+					)
+					(						# save in $1
+						[ ]{0,'.$less_than_tab.'}
+						<(hr)				# start tag = $2
+						\b					# word break
+						([^<>])*?			# 
+						/?>					# the matching end tag
+						[ \t]*
+						(?=\n{2,}|\Z)		# followed by a blank line or end of document
+					)
+			}x',
+			array(&$this, '_hashHTMLBlocks_callback'),
+			$text);
+
+		# Special case for standalone HTML comments:
+		$text = preg_replace_callback('{
+					(?:
+						(?<=\n\n)		# Starting after a blank line
+						|				# or
+						\A\n?			# the beginning of the doc
+					)
+					(						# save in $1
+						[ ]{0,'.$less_than_tab.'}
+						(?s:
+							<!
+							(--.*?--\s*)+
+							>
+						)
+						[ \t]*
+						(?=\n{2,}|\Z)		# followed by a blank line or end of document
+					)
+				}x',
+				array(&$this, '_hashHTMLBlocks_callback'),
+				$text);
+
+		return $text;
+	}
+	function _hashHTMLBlocks_callback($matches) {
+		$text = $matches[1];
+		$key = md5($text);
+		$this->html_blocks[$key] = $text;
+		return "\n\n$key\n\n"; # String that will replace the block
+	}
+
+
+	function runBlockGamut($text) {
+	#
+	# These are all the transformations that form block-level
+	# tags like paragraphs, headers, and list items.
+	#
+		$text = $this->doHeaders($text);
+
+		# Do Horizontal Rules:
+		$text = preg_replace(
+			array('{^[ ]{0,2}([ ]?\*[ ]?){3,}[ \t]*$}mx',
+				  '{^[ ]{0,2}([ ]? -[ ]?){3,}[ \t]*$}mx',
+				  '{^[ ]{0,2}([ ]? _[ ]?){3,}[ \t]*$}mx'),
+			"\n<hr$this->empty_element_suffix\n", 
+			$text);
+
+		$text = $this->doLists($text);
+		$text = $this->doCodeBlocks($text);
+		$text = $this->doBlockQuotes($text);
+
+		# We already ran _HashHTMLBlocks() before, in Markdown(), but that
+		# was to escape raw HTML in the original Markdown source. This time,
+		# we're escaping the markup we've just created, so that we don't wrap
+		# <p> tags around block-level tags.
+		$text = $this->hashHTMLBlocks($text);
+		$text = $this->formParagraphs($text);
+
+		return $text;
+	}
+
+
+	function runSpanGamut($text) {
+	#
+	# These are all the transformations that occur *within* block-level
+	# tags like paragraphs, headers, and list items.
+	#
+		$text = $this->doCodeSpans($text);
+
+		$text = $this->escapeSpecialChars($text);
+
+		# Process anchor and image tags. Images must come first,
+		# because ![foo][f] looks like an anchor.
+		$text = $this->doImages($text);
+		$text = $this->doAnchors($text);
+
+		# Make links out of things like `<http://example.com/>`
+		# Must come after _DoAnchors(), because you can use < and >
+		# delimiters in inline links like [this](<url>).
+		$text = $this->doAutoLinks($text);
+		$text = $this->encodeAmpsAndAngles($text);
+		$text = $this->doItalicsAndBold($text);
+
+		# Do hard breaks:
+		$text = preg_replace('/ {2,}\n/', "<br$this->empty_element_suffix\n", $text);
+
+		return $text;
+	}
+
+
+	function escapeSpecialChars($text) {
+		$tokens = $this->tokenizeHTML($text);
+
+		$text = '';   # rebuild $text from the tokens
+	#	$in_pre = 0;  # Keep track of when we're inside <pre> or <code> tags.
+	#	$tags_to_skip = "!<(/?)(?:pre|code|kbd|script|math)[\s>]!";
+
+		foreach ($tokens as $cur_token) {
+			if ($cur_token[0] == 'tag') {
+				# Within tags, encode * and _ so they don't conflict
+				# with their use in Markdown for italics and strong.
+				# We're replacing each such character with its
+				# corresponding MD5 checksum value; this is likely
+				# overkill, but it should prevent us from colliding
+				# with the escape values by accident.
+				$cur_token[1] = str_replace(array('*', '_'),
+					array($this->escape_table['*'], $this->escape_table['_']),
+					$cur_token[1]);
+				$text .= $cur_token[1];
+			} else {
+				$t = $cur_token[1];
+				$t = $this->encodeBackslashEscapes($t);
+				$text .= $t;
+			}
+		}
+		return $text;
+	}
+
+
+	function doAnchors($text) {
+	#
+	# Turn Markdown link shortcuts into XHTML <a> tags.
+	#
+		#
+		# First, handle reference-style links: [link text] [id]
+		#
+		$text = preg_replace_callback("{
+			(					# wrap whole match in $1
+			  \\[
+				($this->nested_brackets)	# 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)	# link text = $2
+			  \\]
+			  \\(			# literal paren
+				[ \\t]*
+				<?(.*?)>?	# href = $3
+				[ \\t]*
+				(			# $4
+				  (['\"])	# quote char = $5
+				  (.*?)		# Title = $6
+				  \\5		# matching quote
+				)?			# title is optional
+			  \\)
+			)
+			}xs",
+			array(&$this, '_DoAnchors_inline_callback'), $text);
+
+		return $text;
+	}
+	function _doAnchors_reference_callback($matches) {
+		$whole_match = $matches[1];
+		$link_text   = $matches[2];
+		$link_id     = strtolower($matches[3]);
+
+		if ($link_id == "") {
+			$link_id = strtolower($link_text); # for shortcut links like [this][].
+		}
+
+		if (isset($this->urls[$link_id])) {
+			$url = $this->urls[$link_id];
+			# We've got to encode these to avoid conflicting with italics/bold.
+			$url = str_replace(array('*', '_'),
+				array($this->escape_table['*'], $this->escape_table['_']),
+				$url);
+			$result = "<a href=\"$url\"";
+			if ( isset( $this->titles[$link_id] ) ) {
+				$title = $this->titles[$link_id];
+				$title = str_replace(array('*',     '_'),
+									 array($this->escape_table['*'], 
+										   $this->escape_table['_']), $title);
+				$result .=  " title=\"$title\"";
+			}
+			$result .= ">$link_text</a>";
+		}
+		else {
+			$result = $whole_match;
+		}
+		return $result;
+	}
+	function _doAnchors_inline_callback($matches) {
+		$whole_match	= $matches[1];
+		$link_text		= $matches[2];
+		$url			= $matches[3];
+		$title			=& $matches[6];
+
+		# We've got to encode these to avoid conflicting with italics/bold.
+		$url = str_replace(array('*', '_'),
+						   array($this->escape_table['*'], $this->escape_table['_']), 
+						   $url);
+		$result = "<a href=\"$url\"";
+		if (isset($title)) {
+			$title = str_replace('"', '&quot;', $title);
+			$title = str_replace(array('*', '_'),
+								 array($this->escape_table['*'], $this->escape_table['_']),
+								 $title);
+			$result .=  " title=\"$title\"";
+		}
+		
+		$result .= ">$link_text</a>";
+
+		return $result;
+	}
+
+
+	function doImages($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
+			  !\[
+				('.$this->nested_brackets.')		# alt text = $2
+			  \]
+
+			  [ ]?				# 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
+			  !\[
+				('.$this->nested_brackets.')		# alt text = $2
+			  \]
+			  \(			# literal paren
+				[ \t]*
+				<?(\S+?)>?	# src url = $3
+				[ \t]*
+				(			# $4
+				  ([\'"])	# quote char = $5
+				  (.*?)		# title = $6
+				  \5		# matching quote
+				  [ \t]*
+				)?			# title is optional
+			  \)
+			)
+			}xs',
+			array(&$this, '_doImages_inline_callback'), $text);
+
+		return $text;
+	}
+	function _doImages_reference_callback($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 = str_replace('"', '&quot;', $alt_text);
+		if (isset($this->urls[$link_id])) {
+			$url = $this->urls[$link_id];
+			# We've got to encode these to avoid conflicting with italics/bold.
+			$url = str_replace(array('*', '_'),
+							   array($this->escape_table['*'], $this->escape_table['_']),
+							   $url);
+			$result = "<img src=\"$url\" alt=\"$alt_text\"";
+			if (isset($this->titles[$link_id])) {
+				$title = $this->titles[$link_id];
+				$title = str_replace(array('*', '_'),
+									 array($this->escape_table['*'], 
+										   $this->escape_table['_']), $title);
+				$result .=  " title=\"$title\"";
+			}
+			$result .= $this->empty_element_suffix;
+		}
+		else {
+			# If there's no such link ID, leave intact:
+			$result = $whole_match;
+		}
+
+		return $result;
+	}
+	function _doImages_inline_callback($matches) {
+		$whole_match	= $matches[1];
+		$alt_text		= $matches[2];
+		$url			= $matches[3];
+		$title			= '';
+		if (isset($matches[6])) {
+			$title		= $matches[6];
+		}
+
+		$alt_text = str_replace('"', '&quot;', $alt_text);
+		$title    = str_replace('"', '&quot;', $title);
+		# We've got to encode these to avoid conflicting with italics/bold.
+		$url = str_replace(array('*', '_'),
+						   array($this->escape_table['*'], $this->escape_table['_']),
+						   $url);
+		$result = "<img src=\"$url\" alt=\"$alt_text\"";
+		if (isset($title)) {
+			$title = str_replace(array('*', '_'),
+								 array($this->escape_table['*'], $this->escape_table['_']),
+								 $title);
+			$result .=  " title=\"$title\""; # $title already quoted
+		}
+		$result .= $this->empty_element_suffix;
+
+		return $result;
+	}
+
+
+	function doHeaders($text) {
+		# Setext-style headers:
+		#	  Header 1
+		#	  ========
+		#  
+		#	  Header 2
+		#	  --------
+		#
+		$text = preg_replace_callback('{ ^(.+)[ \t]*\n=+[ \t]*\n+ }mx',
+			array(&$this, '_doHeaders_callback_setext_h1'), $text);
+		$text = preg_replace_callback('{ ^(.+)[ \t]*\n-+[ \t]*\n+ }mx',
+			array(&$this, '_doHeaders_callback_setext_h2'), $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
+				[ \t]*
+				(.+?)		# $2 = Header text
+				[ \t]*
+				\#*			# optional closing #\'s (not counted)
+				\n+
+			}xm',
+			array(&$this, '_doHeaders_callback_atx'), $text);
+
+		return $text;
+	}
+	function _doHeaders_callback_setext_h1($matches) {
+		return "<h1>".$this->runSpanGamut($matches[1])."</h1>\n\n";
+	}
+	function _doHeaders_callback_setext_h2($matches) {
+		return "<h2>".$this->runSpanGamut($matches[1])."</h2>\n\n";
+	}
+	function _doHeaders_callback_atx($matches) {
+		$level = strlen($matches[1]);
+		return "<h$level>".$this->runSpanGamut($matches[2])."</h$level>\n\n";
+	}
+
+
+	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  = '[*+-]';
+		$marker_ol  = '\d+[.]';
+		$marker_any = "(?:$marker_ul|$marker_ol)";
+
+		$markers = array($marker_ul, $marker_ol);
+
+		foreach ($markers as $marker) {
+			# Re-usable pattern to match any entirel ul or ol list:
+			$whole_list = '
+				(								# $1 = whole list
+				  (								# $2
+					[ ]{0,'.$less_than_tab.'}
+					('.$marker.')				# $3 = first list item marker
+					[ \t]+
+				  )
+				  (?s:.+?)
+				  (								# $4
+					  \z
+					|
+					  \n{2,}
+					  (?=\S)
+					  (?!						# Negative lookahead for another list item marker
+						[ \t]*
+						'.$marker.'[ \t]+
+					  )
+				  )
+				)
+			'; // 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.'
+					}mx',
+					array(&$this, '_doLists_callback_top'), $text);
+			}
+			else {
+				$text = preg_replace_callback('{
+						(?:(?<=\n\n)|\A\n?)
+						'.$whole_list.'
+					}mx',
+					array(&$this, '_doLists_callback_nested'), $text);
+			}
+		}
+
+		return $text;
+	}
+	function _doLists_callback_top($matches) {
+		# Re-usable patterns to match list item bullets and number markers:
+		$marker_ul  = '[*+-]';
+		$marker_ol  = '\d+[.]';
+		$marker_any = "(?:$marker_ul|$marker_ol)";
+		
+		$list = $matches[1];
+		$list_type = preg_match("/$marker_ul/", $matches[3]) ? "ul" : "ol";
+		
+		$marker_any = ( $list_type == "ul" ? $marker_ul : $marker_ol );
+		
+		# Turn double returns into triple returns, so that we can make a
+		# paragraph for the last item in a list, if necessary:
+		$list = preg_replace("/\n{2,}/", "\n\n\n", $list);
+		$result = $this->processListItems($list, $marker_any);
+		
+		# Trim any trailing whitespace, to put the closing `</$list_type>`
+		# up on the preceding line, to get it past the current stupid
+		# HTML block parser. This is a hack to work around the terrible
+		# hack that is the HTML block parser.
+		$result = rtrim($result);
+		$result = "<$list_type>" . $result . "</$list_type>\n";
+		return $result;
+	}
+	function _doLists_callback_nested($matches) {
+		# Re-usable patterns to match list item bullets and number markers:
+		$marker_ul  = '[*+-]';
+		$marker_ol  = '\d+[.]';
+		$marker_any = "(?:$marker_ul|$marker_ol)";
+		
+		$list = $matches[1];
+		$list_type = preg_match("/$marker_ul/", $matches[3]) ? "ul" : "ol";
+		
+		$marker_any = ( $list_type == "ul" ? $marker_ul : $marker_ol );
+		
+		# Turn double returns into triple returns, so that we can make a
+		# paragraph for the last item in a list, if necessary:
+		$list = preg_replace("/\n{2,}/", "\n\n\n", $list);
+		$result = $this->processListItems($list, $marker_any);
+		$result = "<$list_type>\n" . $result . "</$list_type>\n";
+		return $result;
+	}
+
+	var $list_level = 0;
+
+	function processListItems($list_str, $marker_any) {
+	#
+	#	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
+			(^[ \t]*)						# leading whitespace = $2
+			('.$marker_any.') [ \t]+		# list marker = $3
+			((?s:.+?)						# list item text   = $4
+			(\n{1,2}))
+			(?= \n* (\z | \2 ('.$marker_any.') [ \t]+))
+			}xm',
+			array(&$this, '_processListItems_callback'), $list_str);
+
+		$this->list_level--;
+		return $list_str;
+	}
+	function _processListItems_callback($matches) {
+		$item = $matches[4];
+		$leading_line =& $matches[1];
+		$leading_space =& $matches[2];
+
+		if ($leading_line || preg_match('/\n{2,}/', $item)) {
+			$item = $this->runBlockGamut($this->outdent($item));
+		}
+		else {
+			# Recursion for sub-lists:
+			$item = $this->doLists($this->outdent($item));
+			$item = preg_replace('/\n+$/', '', $item);
+			$item = $this->runSpanGamut($item);
+		}
+
+		return "<li>" . $item . "</li>\n";
+	}
+
+
+	function doCodeBlocks($text) {
+	#
+	#	Process Markdown `<pre><code>` blocks.
+	#
+		$text = preg_replace_callback('{
+				(?:\n\n|\A)
+				(	            # $1 = the code block -- one or more lines, starting with a space/tab
+				  (?:
+					(?:[ ]{'.$this->tab_width.'} | \t)  # 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 $text;
+	}
+	function _doCodeBlocks_callback($matches) {
+		$codeblock = $matches[1];
+
+		$codeblock = $this->encodeCode($this->outdent($codeblock));
+	//	$codeblock = $this->detab($codeblock);
+		# trim leading newlines and trailing whitespace
+		$codeblock = preg_replace(array('/\A\n+/', '/\s+\z/'), '', $codeblock);
+
+		$result = "\n\n<pre><code>" . $codeblock . "\n</code></pre>\n\n";
+
+		return $result;
+	}
+
+
+	function doCodeSpans($text) {
+	#
+	# 	*	Backtick quotes are used for <code></code> spans.
+	#
+	# 	*	You can use multiple backticks as the delimiters if you want to
+	# 		include literal backticks in the code span. So, this input:
+	#
+	#		  Just type ``foo `bar` baz`` at the prompt.
+	#
+	#	  	Will translate to:
+	#
+	#		  <p>Just type <code>foo `bar` baz</code> at the prompt.</p>
+	#
+	#		There's no arbitrary limit to the number of backticks you
+	#		can use as delimters. If you need three consecutive backticks
+	#		in your code, use four for delimiters, etc.
+	#
+	#	*	You can use spaces to get literal backticks at the edges:
+	#
+	#		  ... type `` `bar` `` ...
+	#
+	#	  	Turns to:
+	#
+	#		  ... type <code>`bar`</code> ...
+	#
+		$text = preg_replace_callback('@
+				(?<!\\\)	# Character before opening ` can\'t be a backslash
+				(`+)		# $1 = Opening run of `
+				(.+?)		# $2 = The code block
+				(?<!`)
+				\1			# Matching closer
+				(?!`)
+			@xs',
+			array(&$this, '_doCodeSpans_callback'), $text);
+
+		return $text;
+	}
+	function _doCodeSpans_callback($matches) {
+		$c = $matches[2];
+		$c = preg_replace('/^[ \t]*/', '', $c); # leading whitespace
+		$c = preg_replace('/[ \t]*$/', '', $c); # trailing whitespace
+		$c = $this->encodeCode($c);
+		return "<code>$c</code>";
+	}
+
+
+	function encodeCode($_) {
+	#
+	# Encode/escape certain characters inside Markdown code runs.
+	# The point is that in code, these characters are literals,
+	# and lose their special Markdown meanings.
+	#
+		# Encode all ampersands; HTML entities are not
+		# entities within a Markdown code span.
+		$_ = str_replace('&', '&amp;', $_);
+
+		# Do the angle bracket song and dance:
+		$_ = str_replace(array('<',    '>'), 
+						 array('&lt;', '&gt;'), $_);
+
+		# Now, escape characters that are magic in Markdown:
+		$_ = str_replace(array_keys($this->escape_table), 
+						 array_values($this->escape_table), $_);
+
+		return $_;
+	}
+
+
+	function doItalicsAndBold($text) {
+		# <strong> must go first:
+		$text = preg_replace('{
+				(						# $1: Marker
+					(?<!\*\*) \*\* |	#     (not preceded by two chars of
+					(?<!__)   __		#      the same marker)
+				)						
+				(?=\S) 					# Not followed by whitespace 
+				(?!\1)					#   or two others marker chars.
+				(						# $2: Content
+					(?:
+						[^*_]+?			# Anthing not em markers.
+					|
+										# Balence any regular emphasis inside.
+						([*_]) (?=\S) .+? (?<=\S) \3	# $3: em char (* or _)
+					|
+						(?! \1 ) .		# Allow unbalenced * and _.
+					)+?
+				)
+				(?<=\S) \1				# End mark not preceded by whitespace.
+			}sx',
+			'<strong>\2</strong>', $text);
+		# Then <em>:
+		$text = preg_replace(
+			'{ ( (?<!\*)\* | (?<!_)_ ) (?=\S) (?! \1) (.+?) (?<=\S) \1 }sx',
+			'<em>\2</em>', $text);
+
+		return $text;
+	}
+
+
+	function doBlockQuotes($text) {
+		$text = preg_replace_callback('/
+			  (								# Wrap whole match in $1
+				(
+				  ^[ \t]*>[ \t]?			# ">" at the start of a line
+					.+\n					# rest of the first line
+				  (.+\n)*					# subsequent consecutive lines
+				  \n*						# blanks
+				)+
+			  )
+			/xm',
+			array(&$this, '_doBlockQuotes_callback'), $text);
+
+		return $text;
+	}
+	function _doBlockQuotes_callback($matches) {
+		$bq = $matches[1];
+		# trim one level of quoting - trim whitespace-only lines
+		$bq = preg_replace(array('/^[ \t]*>[ \t]?/m', '/^[ \t]+$/m'), '', $bq);
+		$bq = $this->runBlockGamut($bq);		# recurse
+
+		$bq = preg_replace('/^/m', "  ", $bq);
+		# These leading spaces screw with <pre> content, so we need to fix that:
+		$bq = preg_replace_callback('{(\s*<pre>.+?</pre>)}sx', 
+									array(&$this, '_DoBlockQuotes_callback2'), $bq);
+
+		return "<blockquote>\n$bq\n</blockquote>\n\n";
+	}
+	function _doBlockQuotes_callback2($matches) {
+		$pre = $matches[1];
+		$pre = preg_replace('/^  /m', '', $pre);
+		return $pre;
+	}
+
+
+	function formParagraphs($text) {
+	#
+	#	Params:
+	#		$text - string to process with html <p> tags
+	#
+		# Strip leading and trailing lines:
+		$text = preg_replace(array('/\A\n+/', '/\n+\z/'), '', $text);
+
+		$grafs = preg_split('/\n{2,}/', $text, -1, PREG_SPLIT_NO_EMPTY);
+
+		#
+		# Wrap <p> tags.
+		#
+		foreach ($grafs as $key => $value) {
+			if (!isset( $this->html_blocks[$value] )) {
+				$value = $this->runSpanGamut($value);
+				$value = preg_replace('/^([ \t]*)/', '<p>', $value);
+				$value .= "</p>";
+				$grafs[$key] = $value;
+			}
+		}
+
+		#
+		# Unhashify HTML blocks
+		#
+		foreach ($grafs as $key => $value) {
+			if (isset( $this->html_blocks[$value] )) {
+				$grafs[$key] = $this->html_blocks[$value];
+			}
+		}
+
+		return implode("\n\n", $grafs);
+	}
+
+
+	function encodeAmpsAndAngles($text) {
+	# Smart processing for ampersands and angle brackets that need to be encoded.
+
+		# 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 naked <'s
+		$text = preg_replace('{<(?![a-z/?\$!])}i', '&lt;', $text);
+
+		return $text;
+	}
+
+
+	function encodeBackslashEscapes($text) {
+	#
+	#	Parameter:  String.
+	#	Returns:    The string, with after processing the following backslash
+	#				escape sequences.
+	#
+		# Must process escaped backslashes first.
+		return str_replace(array_keys($this->backslash_escape_table),
+						   array_values($this->backslash_escape_table), $text);
+	}
+
+
+	function doAutoLinks($text) {
+		$text = preg_replace("!<((https?|ftp):[^'\">\\s]+)>!", 
+							 '<a href="\1">\1</a>', $text);
+
+		# Email addresses: <address@domain.foo>
+		$text = preg_replace_callback('{
+			<
+			(?:mailto:)?
+			(
+				[-.\w]+
+				\@
+				[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+
+			)
+			>
+			}xi',
+			array(&$this, '_doAutoLinks_callback'), $text);
+
+		return $text;
+	}
+	function _doAutoLinks_callback($matches) {
+		$address = $matches[1];
+		$address = $this->unescapeSpecialChars($address);
+		$address = $this->encodeEmailAddress($address);
+		return $address;
+	}
+
+
+	function encodeEmailAddress($addr) {
+	#
+	#	Input: an email address, e.g. "foo@example.com"
+	#
+	#	Output: the email address as a mailto link, with each character
+	#		of the address encoded as either a decimal or hex entity, in
+	#		the hopes of foiling most address harvesting spam bots. E.g.:
+	#
+	#	  <a href="&#x6D;&#97;&#105;&#108;&#x74;&#111;:&#102;&#111;&#111;&#64;&#101;
+	#		x&#x61;&#109;&#x70;&#108;&#x65;&#x2E;&#99;&#111;&#109;">&#102;&#111;&#111;
+	#		&#64;&#101;x&#x61;&#109;&#x70;&#108;&#x65;&#x2E;&#99;&#111;&#109;</a>
+	#
+	#	Based by a filter by Matthew Wickline, posted to the BBEdit-Talk
+	#	mailing list: <http://tinyurl.com/yu7ue>
+	#
+		$addr = "mailto:" . $addr;
+		$length = strlen($addr);
+
+		# leave ':' alone (to spot mailto: later)
+		$addr = preg_replace_callback('/([^\:])/', 
+									  array(&$this, '_encodeEmailAddress_callback'), $addr);
+
+		$addr = "<a href=\"$addr\">$addr</a>";
+		# strip the mailto: from the visible part
+		$addr = preg_replace('/">.+?:/', '">', $addr);
+
+		return $addr;
+	}
+	function _encodeEmailAddress_callback($matches) {
+		$char = $matches[1];
+		$r = rand(0, 100);
+		# roughly 10% raw, 45% hex, 45% dec
+		# '@' *must* be encoded. I insist.
+		if ($r > 90 && $char != '@') return $char;
+		if ($r < 45) return '&#x'.dechex(ord($char)).';';
+		return '&#'.ord($char).';';
+	}
+
+
+	function unescapeSpecialChars($text) {
+	#
+	# Swap back in all the special characters we've hidden.
+	#
+		return str_replace(array_values($this->escape_table), 
+						   array_keys($this->escape_table), $text);
+	}
+
+
+	function tokenizeHTML($str) {
+	#
+	#   Parameter:  String containing HTML markup.
+	#   Returns:    An array of the tokens comprising the input
+	#               string. Each token is either a tag (possibly with nested,
+	#               tags contained therein, such as <a href="<MTFoo>">, or a
+	#               run of text between tags. Each element of the array is a
+	#               two-element array; the first is either 'tag' or 'text';
+	#               the second is the actual value.
+	#
+	#
+	#   Regular expression derived from the _tokenize() subroutine in 
+	#   Brad Choate's MTRegex plugin.
+	#   <http://www.bradchoate.com/past/mtregex.php>
+	#
+		$index = 0;
+		$tokens = array();
+
+		$match = '(?s:<!(?:--.*?--\s*)+>)|'.	# comment
+				 '(?s:<\?.*?\?>)|'.				# processing instruction
+												# regular tags
+				 '(?:<[/!$]?[-a-zA-Z0-9:]+\b(?>[^"\'>]+|"[^"]*"|\'[^\']*\')*>)'; 
+
+		$parts = preg_split("{($match)}", $str, -1, PREG_SPLIT_DELIM_CAPTURE);
+
+		foreach ($parts as $part) {
+			if (++$index % 2 && $part != '') 
+				$tokens[] = array('text', $part);
+			else
+				$tokens[] = array('tag', $part);
+		}
+
+		return $tokens;
+	}
+
+
+	function outdent($text) {
+	#
+	# Remove one level of line-leading tabs or spaces
+	#
+		return preg_replace("/^(\\t|[ ]{1,$this->tab_width})/m", "", $text);
+	}
+
+
+	function detab($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.
+		
+		$lines = explode("\n", $text);
+		$text = "";
+		
+		foreach ($lines as $line) {
+			# 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) % $this->tab_width;
+				$line .= str_repeat(" ", $amount) . $block;
+			}
+			$text .= "$line\n";
+		}
+		return $text;
+	}
+
+}
+
+
+/*
+
+PHP Markdown
+============
+
+Description
+-----------
+
+This is a PHP translation of the original Markdown formatter written in
+Perl by John Gruber.
+
+Markdown is a text-to-HTML filter; it translates an easy-to-read /
+easy-to-write structured text format into HTML. Markdown's text format
+is most similar to that of plain text email, and supports features such
+as headers, *emphasis*, code blocks, blockquotes, and links.
+
+Markdown's syntax is designed not as a generic markup language, but
+specifically to serve as a front-end to (X)HTML. You can use span-level
+HTML tags anywhere in a Markdown document, and you can use block level
+HTML tags (like <div> and <table> as well).
+
+For more information about Markdown's syntax, see:
+
+<http://daringfireball.net/projects/markdown/>
+
+
+Bugs
+----
+
+To file bug reports please send email to:
+
+<michel.fortin@michelf.com>
+
+Please include with your report: (1) the example input; (2) the output you
+expected; (3) the output Markdown actually produced.
+
+
+Version History
+--------------- 
+
+See the readme file for detailed release notes for this version.
+
+1.0.1oo (19 May 2006)
+
+*   Converted PHP Markdown to a object-oriented design.
+
+
+1.0.1c (9 Dec 2005)
+
+1.0.1b (6 Jun 2005)
+
+1.0.1a (15 Apr 2005)
+
+1.0.1 (16 Dec 2004)
+
+1.0 (21 Aug 2004)
+
+
+Author & Contributors
+---------------------
+
+Original Markdown by John Gruber  
+<http://daringfireball.net/>
+
+PHP port and extras by Michel Fortin  
+<http://www.michelf.com/>
+
+
+Copyright and License
+---------------------
+
+Copyright (c) 2004-2006 Michel Fortin  
+<http://www.michelf.com/>  
+All rights reserved.
+
+Copyright (c) 2003-2004 John Gruber   
+<http://daringfireball.net/>   
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+*	Redistributions of source code must retain the above copyright notice,
+	this list of conditions and the following disclaimer.
+
+*	Redistributions in binary form must reproduce the above copyright
+	notice, this list of conditions and the following disclaimer in the
+	documentation and/or other materials provided with the distribution.
+
+*	Neither the name "Markdown" nor the names of its contributors may
+	be used to endorse or promote products derived from this software
+	without specific prior written permission.
+
+This software is provided by the copyright holders and contributors "as
+is" and any express or implied warranties, including, but not limited
+to, the implied warranties of merchantability and fitness for a
+particular purpose are disclaimed. In no event shall the copyright owner
+or contributors be liable for any direct, indirect, incidental, special,
+exemplary, or consequential damages (including, but not limited to,
+procurement of substitute goods or services; loss of use, data, or
+profits; or business interruption) however caused and on any theory of
+liability, whether in contract, strict liability, or tort (including
+negligence or otherwise) arising in any way out of the use of this
+software, even if advised of the possibility of such damage.
+
+*/
+?>