From 2848d1caaf48a33ab1fb9a0c7de534287107e57e Mon Sep 17 00:00:00 2001 From: Klaus Weidenbach Date: Mon, 27 Feb 2017 23:36:07 +0100 Subject: Move library/markdown.php to keep history. --- library/markdown.php | 2932 -------------------- .../michelf/php-markdown/Michelf/MarkdownExtra.php | 2932 ++++++++++++++++++++ 2 files changed, 2932 insertions(+), 2932 deletions(-) delete mode 100644 library/markdown.php create mode 100644 vendor/michelf/php-markdown/Michelf/MarkdownExtra.php diff --git a/library/markdown.php b/library/markdown.php deleted file mode 100644 index 0e3275ff2..000000000 --- a/library/markdown.php +++ /dev/null @@ -1,2932 +0,0 @@ - -# -# Original Markdown -# Copyright (c) 2004-2006 John Gruber -# -# - - -define( 'MARKDOWN_VERSION', "1.0.1o" ); # Sun 8 Jan 2012 -define( 'MARKDOWNEXTRA_VERSION', "1.2.5" ); # Sun 8 Jan 2012 - - -# -# 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 ); - -# Optional title attribute for footnote links and backlinks. -@define( 'MARKDOWN_FN_LINK_TITLE', "" ); -@define( 'MARKDOWN_FN_BACKLINK_TITLE', "" ); - -# Optional class attribute for footnote links and backlinks. -@define( 'MARKDOWN_FN_LINK_CLASS', "" ); -@define( 'MARKDOWN_FN_BACKLINK_CLASS', "" ); - - -# -# 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', 'MarkdownExtra_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 Extra -Plugin URI: http://michelf.com/projects/php-markdown/ -Description: Markdown syntax allows you to write using an easy-to-read, easy-to-write plain text format. Based on the original Perl version by John Gruber. More... -Version: 1.2.5 -Author: Michel Fortin -Author URI: http://michelf.com/ -*/ - -if (isset($wp_version)) { - # More details about how it works here: - # - - # Post content and excerpts - # - Remove WordPress paragraph generator. - # - Run Markdown on excerpt, then remove all tags. - # - Add paragraph tag around the excerpt, but remove it for the excerpt rss. - if (MARKDOWN_WP_POSTS) { - remove_filter('the_content', 'wpautop'); - remove_filter('the_content_rss', 'wpautop'); - remove_filter('the_excerpt', 'wpautop'); - add_filter('the_content', 'mdwp_MarkdownPost', 6); - add_filter('the_content_rss', 'mdwp_MarkdownPost', 6); - add_filter('get_the_excerpt', 'mdwp_MarkdownPost', 6); - add_filter('get_the_excerpt', 'trim', 7); - add_filter('the_excerpt', 'mdwp_add_p'); - add_filter('the_excerpt_rss', 'mdwp_strip_p'); - - remove_filter('content_save_pre', 'balanceTags', 50); - remove_filter('excerpt_save_pre', 'balanceTags', 50); - add_filter('the_content', 'balanceTags', 50); - add_filter('get_the_excerpt', 'balanceTags', 9); - } - - # Add a footnote id prefix to posts when inside a loop. - function mdwp_MarkdownPost($text) { - static $parser; - if (!$parser) { - $parser_class = MARKDOWN_PARSER_CLASS; - $parser = new $parser_class; - } - if (is_single() || is_page() || is_feed()) { - $parser->fn_id_prefix = ""; - } else { - $parser->fn_id_prefix = get_the_ID() . "."; - } - return $parser->transform($text); - } - - # 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', 30); - 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 $mdwp_hidden_tags, $mdwp_placeholders; - $mdwp_hidden_tags = explode(' ', - '
    • '); - $mdwp_placeholders = explode(' ', str_rot13( - 'pEj07ZbbBZ U1kqgh4w4p pre2zmeN6K QTi31t9pre ol0MP1jzJR '. - 'ML5IjmbRol ulANi1NsGY J7zRLJqPul liA8ctl16T K9nhooUHli')); - } - - function mdwp_add_p($text) { - if (!preg_match('{^$|^<(p|ul|ol|dl|pre|blockquote)>}i', $text)) { - $text = '

    '.$text.'

    '; - $text = preg_replace('{\n{2,}}', "

    \n\n

    ", $text); - } - return $text; - } - - function mdwp_strip_p($t) { return preg_replace('{}i', '', $t); } - - function mdwp_hide_tags($text) { - global $mdwp_hidden_tags, $mdwp_placeholders; - return str_replace($mdwp_hidden_tags, $mdwp_placeholders, $text); - } - function mdwp_show_tags($text) { - global $mdwp_hidden_tags, $mdwp_placeholders; - return str_replace($mdwp_placeholders, $mdwp_hidden_tags, $text); - } -} - - -### bBlog Plugin Info ### - -function identify_modifier_markdown() { - return array( - 'name' => 'markdown', - 'type' => 'modifier', - 'nicename' => 'PHP Markdown Extra', - 'description' => 'A text-to-HTML conversion tool for web writers', - 'authors' => 'Michel Fortin and John Gruber', - 'licence' => 'GPL', - 'version' => MARKDOWNEXTRA_VERSION, - 'help' => 'Markdown syntax allows you to write using an easy-to-read, easy-to-write plain text format. Based on the original Perl version by John Gruber. More...', - ); -} - - -### Smarty Modifier Interface ### - -function smarty_modifier_markdown($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 $text; - } - # Fake restricted version: restrictions are not supported for now. - function TextileRestricted($text, $lite='', $noimage='') { - return $this->TextileThis($text, $lite); - } - # Workaround to ensure compatibility with TextPattern 4.0.3. - function blockLite($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_re; - - var $nested_url_parenthesis_depth = 4; - var $nested_url_parenthesis_re; - - # Table of hash values for escaped characters: - var $escape_chars = '\`*_{}[]()>#+-.!'; - var $escape_chars_re; - - # Change to ">" for HTML output. - var $empty_element_suffix = MARKDOWN_EMPTY_ELEMENT_SUFFIX; - var $tab_width = MARKDOWN_TAB_WIDTH; - - # Change to `true` to disallow markup or entities. - var $no_markup = false; - var $no_entities = false; - - # Predefined urls and titles for reference links and images. - var $predef_urls = array(); - var $predef_titles = array(); - - - function Markdown_Parser() { - # - # 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. - var $urls = array(); - var $titles = array(); - var $html_hashes = array(); - - # Status flag to avoid invalid nesting. - var $in_anchor = false; - - - 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(); - - $in_anchor = false; - } - - function teardown() { - # - # Called after the transformation process to clear any variable - # which may be taking up memory unnecessarly. - # - $this->urls = array(); - $this->titles = array(); - $this->html_hashes = array(); - } - - - function transform($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"; - } - - var $document_gamut = array( - # Strip link definitions, store in hashes. - "stripLinkDefinitions" => 20, - - "runBasicBlockGamut" => 30, - ); - - - function stripLinkDefinitions($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 $text; - } - function _stripLinkDefinitions_callback($matches) { - $link_id = strtolower($matches[1]); - $url = $matches[2] == '' ? $matches[3] : $matches[2]; - $this->urls[$link_id] = $url; - $this->titles[$link_id] =& $matches[4]; - return ''; # String that will replace the block - } - - - function hashHTMLBlocks($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

    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|form|fieldset|iframe|math'; - - # 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(' - # 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.: - #

    - #
    - # tags for inner block must be indented. - #
    - #
    - # - # 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 `
    ` and stop at the first `
    `. - $text = preg_replace_callback('{(?> - (?> - (?<=\n\n) # Starting after a blank line - | # or - \A\n? # the beginning of the doc - ) - ( # save in $1 - - # Match from `\n` to `\n`, handling nested tags - # in between. - - [ ]{0,'.$less_than_tab.'} - <('.$block_tags_b_re.')# start tag = $2 - '.$attr.'> # attributes followed by > and \n - '.$content.' # content, support nesting - # the matching end tag - [ ]* # trailing spaces/tabs - (?=\n+|\Z) # followed by a newline or end of document - - | # Special version for tags of group a. - - [ ]{0,'.$less_than_tab.'} - <('.$block_tags_a_re.')# start tag = $3 - '.$attr.'>[ ]*\n # attributes followed by > - '.$content2.' # content, support nesting - # the matching end tag - [ ]* # trailing spaces/tabs - (?=\n+|\Z) # followed by a newline or end of document - - | # Special case just for
    . It was easier to make a special - # case than to make the other regex more complicated. - - [ ]{0,'.$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,'.$less_than_tab.'} - (?s: - - ) - [ ]* - (?=\n{2,}|\Z) # followed by a blank line or end of document - - | # PHP and ASP-style processor instructions ( - ) - [ ]* - (?=\n{2,}|\Z) # followed by a blank line or end of document - - ) - )}Sxmi', - array(&$this, '_hashHTMLBlocks_callback'), - $text); - - return $text; - } - function _hashHTMLBlocks_callback($matches) { - $text = $matches[1]; - $key = $this->hashBlock($text); - return "\n\n$key\n\n"; - } - - - function hashPart($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 $key; # String that will replace the tag. - } - - - function hashBlock($text) { - # - # Shortcut function for hashPart with block-level boundaries. - # - return $this->hashPart($text, 'B'); - } - - - var $block_gamut = array( - # - # These are all the transformations that form block-level - # tags like paragraphs, headers, and list items. - # - "doHeaders" => 10, - "doHorizontalRules" => 20, - - "doLists" => 40, - "doCodeBlocks" => 50, - "doBlockQuotes" => 60, - ); - - function runBlockGamut($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); - } - - 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 $text; - } - - - function doHorizontalRules($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("empty_element_suffix")."\n", - $text); - } - - - var $span_gamut = array( - # - # These are all the transformations that occur *within* block-level - # tags like paragraphs, headers, and list items. - # - # Process character escapes, code spans, and inline HTML - # in one shot. - "parseSpan" => -30, - - # Process anchor and image tags. Images must come first, - # because ![foo][f] looks like an anchor. - "doImages" => 10, - "doAnchors" => 20, - - # Make links out of things like `` - # Must come after doAnchors, because you can use < and > - # delimiters in inline links like [this](). - "doAutoLinks" => 30, - "encodeAmpsAndAngles" => 40, - - "doItalicsAndBold" => 50, - "doHardBreaks" => 60, - ); - - function runSpanGamut($text) { - # - # Run span gamut tranformations. - # - foreach ($this->span_gamut as $method => $priority) { - $text = $this->$method($text); - } - - return $text; - } - - - function doHardBreaks($text) { - # Do hard breaks: - return preg_replace_callback('/ {2,}\n/', - array(&$this, '_doHardBreaks_callback'), $text); - } - function _doHardBreaks_callback($matches) { - return $this->hashPart("empty_element_suffix\n"); - } - - - function doAnchors($text) { - # - # Turn Markdown link shortcuts into XHTML 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 $text; - } - function _doAnchors_reference_callback($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 = $this->encodeAttribute($url); - - $result = "titles[$link_id] ) ) { - $title = $this->titles[$link_id]; - $title = $this->encodeAttribute($title); - $result .= " title=\"$title\""; - } - - $link_text = $this->runSpanGamut($link_text); - $result .= ">$link_text"; - $result = $this->hashPart($result); - } - else { - $result = $whole_match; - } - return $result; - } - function _doAnchors_inline_callback($matches) { - $whole_match = $matches[1]; - $link_text = $this->runSpanGamut($matches[2]); - $url = $matches[3] == '' ? $matches[4] : $matches[3]; - $title =& $matches[7]; - - $url = $this->encodeAttribute($url); - - $result = "encodeAttribute($title); - $result .= " title=\"$title\""; - } - - $link_text = $this->runSpanGamut($link_text); - $result .= ">$link_text"; - - return $this->hashPart($result); - } - - - function doImages($text) { - # - # Turn Markdown image shortcuts into 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 $text; - } - function _doImages_reference_callback($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 = $this->encodeAttribute($this->urls[$link_id]); - $result = "\"$alt_text\"";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 $result; - } - function _doImages_inline_callback($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 = $this->encodeAttribute($url); - $result = "\"$alt_text\"";encodeAttribute($title); - $result .= " title=\"$title\""; # $title already quoted - } - $result .= $this->empty_element_suffix; - - return $this->hashPart($result); - } - - - 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 $text; - } - function _doHeaders_callback_setext($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; - $block = "".$this->runSpanGamut($matches[1]).""; - return "\n" . $this->hashBlock($block) . "\n\n"; - } - function _doHeaders_callback_atx($matches) { - $level = strlen($matches[1]); - $block = "".$this->runSpanGamut($matches[2]).""; - return "\n" . $this->hashBlock($block) . "\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_re = '[*+-]'; - $marker_ol_re = '\d+[\.]'; - $marker_any_re = "(?:$marker_ul_re|$marker_ol_re)"; - - $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 $text; - } - function _doLists_callback($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 . ""); - return "\n". $result ."\n\n"; - } - - var $list_level = 0; - - function processListItems($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 $list_str; - } - function _processListItems_callback($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 "
  • " . $item . "
    • \n"; - } - - - function doCodeBlocks($text) { - # - # Process Markdown `
    ` 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 $text;
-	}
-	function _doCodeBlocks_callback($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 = "
    $codeblock\n
    ";
-		return "\n\n".$this->hashBlock($codeblock)."\n\n";
-	}
-
-
-	function makeCodeSpan($code) {
-	#
-	# Create a code span markup for $code. Called from handleSpanToken.
-	#
-		$code = htmlspecialchars(trim($code), ENT_NOQUOTES);
-		return $this->hashPart("$code");
-	}
-
-
-	var $em_relist = array(
-		''  => '(?:(? '(?<=\S|^)(? '(?<=\S|^)(? '(?:(? '(?<=\S|^)(? '(?<=\S|^)(? '(?:(? '(?<=\S|^)(? '(?<=\S|^)(?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"] = $token_re;
-			}
-		}
-	}
-	
-	function doItalicsAndBold($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);
-					$span = "$span";
-					$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";
-					$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";
-						$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);
-					$span = "$span";
-					$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);
-						$span = "$span";
-						$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 $text_stack[0];
-	}
-
-
-	function doBlockQuotes($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 $text;
-	}
-	function _doBlockQuotes_callback($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 
     content, 
-		# so we need to fix that:
-		$bq = preg_replace_callback('{(\s*
    .+?
    )}sx', 
-			array(&$this, '_doBlockQuotes_callback2'), $bq);
-
-		return "\n". $this->hashBlock("
    \n$bq\n
    ")."\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 
     tags
-	#
-		# Strip leading and trailing lines:
-		$text = preg_replace('/\A\n+|\n+\z/', '', $text);
-
-		$grafs = preg_split('/\n{2,}/', $text, -1, PREG_SPLIT_NO_EMPTY);
-
-		#
-		# Wrap 
     tags and unhashify HTML blocks
-		#
-		foreach ($grafs as $key => $value) {
-			if (!preg_match('/^B\x1A[0-9]+B$/', $value)) {
-				# Is a paragraph.
-				$value = $this->runSpanGamut($value);
-				$value = preg_replace('/^([ ]*)/', "
    ", $value);
-				$value .= "
    ";
-				$grafs[$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 = 
     tag
-//					  
    ]*
-//					  \b
-//					  markdown\s*=\s*  ([\'"])	#	$2 = attr quote char
-//					  1
-//					  \2
-//					  [^>]*
-//					  >
-//					)
-//					(							# $3 = contents
-//					.*
-//					)
-//					(
    )					# $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", $grafs);
-	}
-
-
-	function encodeAttribute($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('"', '"', $text);
-		return $text;
-	}
-	
-	
-	function encodeAmpsAndAngles($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('&', '&', $text);
-		} else {
-			# Ampersand-encoding based entirely on Nat Irons's Amputator
-			# MT plugin: 
-			$text = preg_replace('/&(?!#?[xX]?(?:[0-9a-fA-F]+|\w+);)/', 
-								'&', $text);;
-		}
-		# Encode remaining <'s
-		$text = str_replace('<', '<', $text);
-
-		return $text;
-	}
-
-
-	function doAutoLinks($text) {
-		$text = preg_replace_callback('{<((https?|ftp|dict):[^\'">\s]+)>}i', 
-			array(&$this, '_doAutoLinks_url_callback'), $text);
-
-		# Email addresses: 
-		$text = preg_replace_callback('{
-			<
-			(?:mailto:)?
-			(
-				(?:
-					[-!#$%&\'*+/=?^_`.{|}~\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 $text;
-	}
-	function _doAutoLinks_url_callback($matches) {
-		$url = $this->encodeAttribute($matches[1]);
-		$link = "$url";
-		return $this->hashPart($link);
-	}
-	function _doAutoLinks_email_callback($matches) {
-		$address = $matches[1];
-		$link = $this->encodeEmailAddress($address);
-		return $this->hashPart($link);
-	}
-
-
-	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.:
-	#
-	#	  
    foo@exampl
-	#        e.com
    
-	#
-	#	Based by a filter by Matthew Wickline, posted to BBEdit-Talk.
-	#   With some optimizations by Milian Wolff.
-	#
-		$addr = "mailto:" . $addr;
-		$chars = preg_split('/(? $char) {
-			$ord = ord($char);
-			# Ignore non-ascii chars.
-			if ($ord < 128) {
-				$r = ($seed * (1 + $key)) % 100; # Pseudo-random function.
-				# roughly 10% raw, 45% hex, 45% dec
-				# '@' *must* be encoded. I insist.
-				if ($r > 90 && $char != '@') /* do nothing */;
-				else if ($r < 45) $chars[$key] = '&#x'.dechex($ord).';';
-				else              $chars[$key] = '&#'.$ord.';';
-			}
-		}
-		
-		$addr = implode('', $chars);
-		$text = implode('', array_slice($chars, 7)); # text without `mailto:`
-		$addr = "$text";
-
-		return $addr;
-	}
-
-
-	function parseSpan($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.'
-				|
-					(?no_markup ? '' : '
-				|
-							# comment
-				|
-					<\?.*?\?> | <%.*?%>		# processing instruction
-				|
-					<[/!$]?[-a-zA-Z0-9:_]+	# regular tags
-					(?>
-						\s
-						(?>[^"\'>]+|"[^"]*"|\'[^\']*\')*
-					)?
-					>
-			').'
-				)
-				}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 $output;
-	}
-	
-	
-	function handleSpanToken($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);
-		}
-	}
-
-
-	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.
-	var $utf8_strlen = 'mb_strlen';
-	
-	function detab($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 $text;
-	}
-	function _detab_callback($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 $line;
-	}
-	function _initDetab() {
-	#
-	# Check for the availability of the function in the `utf8_strlen` property
-	# (initially `mb_strlen`). If the function is not available, create a 
-	# function that will loosely count the number of UTF-8 characters with a
-	# regular expression.
-	#
-		if (function_exists($this->utf8_strlen)) return;
-		$this->utf8_strlen = create_function('$text', 'return preg_match_all(
-			"/[\\\\x00-\\\\xBF]|[\\\\xC0-\\\\xFF][\\\\x80-\\\\xBF]*/", 
-			$text, $m);');
-	}
-
-
-	function unhash($text) {
-	#
-	# Swap back in all the tags hashed by _HashHTMLBlocks.
-	#
-		return preg_replace_callback('/(.)\x1A[0-9]+\1/', 
-			array(&$this, '_unhash_callback'), $text);
-	}
-	function _unhash_callback($matches) {
-		return $this->html_hashes[$matches[0]];
-	}
-
-}
-
-
-#
-# Markdown Extra Parser Class
-#
-
-class MarkdownExtra_Parser extends Markdown_Parser {
-
-	# Prefix for footnote ids.
-	var $fn_id_prefix = "";
-	
-	# Optional title attribute for footnote links and backlinks.
-	var $fn_link_title = MARKDOWN_FN_LINK_TITLE;
-	var $fn_backlink_title = MARKDOWN_FN_BACKLINK_TITLE;
-	
-	# Optional class attribute for footnote links and backlinks.
-	var $fn_link_class = MARKDOWN_FN_LINK_CLASS;
-	var $fn_backlink_class = MARKDOWN_FN_BACKLINK_CLASS;
-	
-	# Predefined abbreviations.
-	var $predef_abbr = array();
-
-
-	function MarkdownExtra_Parser() {
-	#
-	# 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::Markdown_Parser();
-	}
-	
-	
-	# Extra variables used during extra transformations.
-	var $footnotes = array();
-	var $footnotes_ordered = array();
-	var $abbr_desciptions = array();
-	var $abbr_word_re = '';
-	
-	# Give the current footnote number.
-	var $footnote_counter = 1;
-	
-	
-	function setup() {
-	#
-	# Setting up Extra-specific variables.
-	#
-		parent::setup();
-		
-		$this->footnotes = array();
-		$this->footnotes_ordered = 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);
-		}
-	}
-	
-	function teardown() {
-	#
-	# Clearing Extra-specific variables.
-	#
-		$this->footnotes = array();
-		$this->footnotes_ordered = array();
-		$this->abbr_desciptions = array();
-		$this->abbr_word_re = '';
-		
-		parent::teardown();
-	}
-	
-	
-	### HTML Block Parser ###
-	
-	# Tags that are always treated as block tags:
-	var $block_tags_re = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|address|form|fieldset|iframe|hr|legend';
-	
-	# Tags treated as block tags only if the opening tag is alone on it's line:
-	var $context_block_tags_re = 'script|noscript|math|ins|del';
-	
-	# Tags where markdown="1" default to span mode:
-	var $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:
-	var $clean_tags_re = 'script|math';
-	
-	# Tags that do not need to be closed.
-	var $auto_close_tags_re = 'hr|img';
-	
-
-	function hashHTMLBlocks($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 
    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 whitin 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!
-	#
-		#
-		# Call the HTML-in-Markdown hasher.
-		#
-		list($text, ) = $this->_hashHTMLBlocks_inMarkdown($text);
-		
-		return $text;
-	}
-	function _hashHTMLBlocks_inMarkdown($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:
-	#
-	#     
    
-	#         
    
-	#         Hello World.  <-- Is this a Markdown code block or text?
-	#         
      <-- Is this a Markdown code block or a real tag?
-	#     
    
-	#
-	#     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 =
-			'{
-				(					# $2: Capture hole tag.
-									# Tag name.
-							'.$this->block_tags_re.'			|
-							'.$this->context_block_tags_re.'	|
-							'.$this->clean_tags_re.'        	|
-							(?!\s)'.$enclosing_tag_re.'
-						)
-						(?:
-							(?=[\s"\'/a-zA-Z0-9])	# Allowed characters after tag name.
-							(?>
-								".*?"		|	# Double quotes (can contain `>`)
-								\'.*?\'   	|	# Single quotes (can contain `>`)
-								.+?				# Anything but quotes and `>`.
-							)*?
-						)?
-					>					# End of tag.
-				|
-						# HTML Comment
-				|
-					<\?.*?\?> | <%.*?%>	# Processing instruction
-				|
-						# CData Block
-				|
-					# Code span marker
-					`+
-				'. ( !$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).'}~~~+[ ]*\n
-				' : '' ). ' # End (if not is span).
-				)
-			}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: Code span marker
-			#
-			if ($tag{0} == "`") {
-				# Find corresponding end marker.
-				$tag_re = preg_quote($tag);
-				if (preg_match('{^(?>.+?|\n(?!\n))*?(?.*\n)+?[ ]{0,'.($indent).'}'.$tag_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 .= $tag;
-			}
-			#
-			# Check for: Opening Block level tag or
-			#            Opening Context Block tag (like ins and del) 
-			#               used as a block tag (tag is alone on it's line).
-			#
-			else if (preg_match('{^<(?:'.$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('{^= 0);
-		
-		return array($parsed, $text);
-	}
-	function _hashHTMLBlocks_inHTML($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 hole tag.
-					
-								".*?"		|	# Double quotes (can contain `>`)
-								\'.*?\'   	|	# Single quotes (can contain `>`)
-								.+?				# Anything but quotes and `>`.
-							)*?
-						)?
-					>					# End of tag.
-				|
-						# HTML Comment
-				|
-					<\?.*?\?> | <%.*?%>	# Processing instruction
-				|
-						# 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 
    )
-			#			 Comments and Processing Instructions.
-			#
-			if (preg_match('{^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('{^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 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, $text);
-	}
-
-
-	function hashClean($text) {
-	#
-	# Called whenever a tag must be hashed when a function insert a "clean" tag
-	# in $text, it pass through this function and is automaticaly escaped, 
-	# blocking invalid nested overlap.
-	#
-		return $this->hashPart($text, 'C');
-	}
-
-
-	function doHeaders($text) {
-	#
-	# Redefined to add id attribute support.
-	#
-		# Setext-style headers:
-		#	  Header 1  {#header1}
-		#	  ========
-		#  
-		#	  Header 2  {#header2}
-		#	  --------
-		#
-		$text = preg_replace_callback(
-			'{
-				(^.+?)								# $1: Header text
-				(?:[ ]+\{\#([-_:a-zA-Z0-9]+)\})?	# $2: Id attribute
-				[ ]*\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}
-		#	...
-		#	###### Header 6   {#header2}
-		#
-		$text = preg_replace_callback('{
-				^(\#{1,6})	# $1 = string of #\'s
-				[ ]*
-				(.+?)		# $2 = Header text
-				[ ]*
-				\#*			# optional closing #\'s (not counted)
-				(?:[ ]+\{\#([-_:a-zA-Z0-9]+)\})? # id attribute
-				[ ]*
-				\n+
-			}xm',
-			array(&$this, '_doHeaders_callback_atx'), $text);
-
-		return $text;
-	}
-	function _doHeaders_attr($attr) {
-		if (empty($attr))  return "";
-		return " id=\"$attr\"";
-	}
-	function _doHeaders_callback_setext($matches) {
-		if ($matches[3] == '-' && preg_match('{^- }', $matches[1]))
-			return $matches[0];
-		$level = $matches[3]{0} == '=' ? 1 : 2;
-		$attr  = $this->_doHeaders_attr($id =& $matches[2]);
-		$block = "".$this->runSpanGamut($matches[1])."";
-		return "\n" . $this->hashBlock($block) . "\n\n";
-	}
-	function _doHeaders_callback_atx($matches) {
-		$level = strlen($matches[1]);
-		$attr  = $this->_doHeaders_attr($id =& $matches[3]);
-		$block = "".$this->runSpanGamut($matches[2])."";
-		return "\n" . $this->hashBlock($block) . "\n\n";
-	}
-
-
-	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 $text;
-	}
-	function _doTable_leadingPipe_callback($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, $content));
-	}
-	function _doTable_callback($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] = ' align="right"';
-			else if (preg_match('/^ *:-+: *$/', $s))$attr[$n] = ' align="center"';
-			else if (preg_match('/^ *:-+ *$/', $s))	$attr[$n] = ' align="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);
-		
-		# Write column headers.
-		$text = "\n";
-		$text .= "\n";
-		$text .= "\n";
-		foreach ($headers as $n => $header)
-			$text .= "  ".$this->runSpanGamut(trim($header))."\n";
-		$text .= "\n";
-		$text .= "\n";
-		
-		# Split content by row.
-		$rows = explode("\n", trim($content, "\n"));
-		
-		$text .= "\n";
-		foreach ($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, '');
-			
-			$text .= "\n";
-			foreach ($row_cells as $n => $cell)
-				$text .= "  ".$this->runSpanGamut(trim($cell))."\n";
-			$text .= "\n";
-		}
-		$text .= "\n";
-		$text .= "
    ";
-		
-		return $this->hashBlock($text) . "\n";
-	}
-
-	
-	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 $text;
-	}
-	function _doDefLists_callback($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 = "
    \n" . $result . "\n
    ";
-		return $this->hashBlock($result) . "\n\n";
-	}
-
-
-	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.'} [:][ ]	|
-					
     | \z
-				)						
-			)					
-			}xm',
-			array(&$this, '_processDefListItems_callback_dd'), $list_str);
-
-		return $list_str;
-	}
-	function _processDefListItems_callback_dt($matches) {
-		$terms = explode("\n", trim($matches[1]));
-		$text = '';
-		foreach ($terms as $term) {
-			$term = $this->runSpanGamut(trim($term));
-			$text .= "\n
    " . $term . "
    ";
-		}
-		return $text . "\n";
-	}
-	function _processDefListItems_callback_dd($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
    " . $def . "
    \n";
-	}
-
-
-	function doFencedCodeBlocks($text) {
-	#
-	# Adding the fenced code block syntax to regular Markdown:
-	#
-	# ~~~
-	# Code block
-	# ~~~
-	#
-		$less_than_tab = $this->tab_width;
-		
-		$text = preg_replace_callback('{
-				(?:\n|\A)
-				# 1: Opening marker
-				(
-					~{3,} # Marker: three tilde or more.
-				)
-				[ ]* \n # Whitespace and newline following marker.
-				
-				# 2: Content
-				(
-					(?>
-						(?!\1 [ ]* \n)	# Not a closing marker.
-						.*\n+
-					)+
-				)
-				
-				# Closing marker.
-				\1 [ ]* \n
-			}xm',
-			array(&$this, '_doFencedCodeBlocks_callback'), $text);
-
-		return $text;
-	}
-	function _doFencedCodeBlocks_callback($matches) {
-		$codeblock = $matches[2];
-		$codeblock = htmlspecialchars($codeblock, ENT_NOQUOTES);
-		$codeblock = preg_replace_callback('/^\n+/',
-			array(&$this, '_doFencedCodeBlocks_newlines'), $codeblock);
-		$codeblock = "
    $codeblock
    ";
-		return "\n\n".$this->hashBlock($codeblock)."\n\n";
-	}
-	function _doFencedCodeBlocks_newlines($matches) {
-		return str_repeat("empty_element_suffix", 
-			strlen($matches[0]));
-	}
-
-
-	#
-	# Redefining emphasis markers so that emphasis by underscore does not
-	# work in the middle of a word.
-	#
-	var $em_relist = array(
-		''  => '(?:(? '(?<=\S|^)(? '(?<=\S|^)(? '(?:(? '(?<=\S|^)(? '(?<=\S|^)(? '(?:(? '(?<=\S|^)(? '(?<=\S|^)(? tags
-	#
-		# Strip leading and trailing lines:
-		$text = preg_replace('/\A\n+|\n+\z/', '', $text);
-		
-		$grafs = preg_split('/\n{2,}/', $text, -1, PREG_SPLIT_NO_EMPTY);
-
-		#
-		# Wrap 
     tags and unhashify HTML blocks
-		#
-		foreach ($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 = "
    $value
    ";
-			}
-			$grafs[$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 $text;
-	}
-	
-	
-	### Footnotes
-	
-	function stripFootnotes($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 marker.
-					(?!\n+[ ]{0,3}\S)# ensure line is not blank and followed 
-									# by non-indented content
-				)*
-			)		
-			}xm',
-			array(&$this, '_stripFootnotes_callback'),
-			$text);
-		return $text;
-	}
-	function _stripFootnotes_callback($matches) {
-		$note_id = $this->fn_id_prefix . $matches[1];
-		$this->footnotes[$note_id] = $this->outdent($matches[2]);
-		return ''; # String that will replace the block
-	}
-
-
-	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 $text;
-	}
-
-	
-	function appendFootnotes($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 .= "
    \n";
-			$text .= "empty_element_suffix ."\n";
-			$text .= "
      \n\n";
-			
-			$attr = " rev=\"footnote\"";
-			if ($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]);
-				
-				$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);
-				
-				# Add backlink to last paragraph; create new paragraph if needed.
-				$backlink = "↩";
-				if (preg_match('{
      $}', $footnote)) {
-					$footnote = substr($footnote, 0, -4) . " $backlink
      ";
-				} else {
-					$footnote .= "\n\n
      $backlink
      ";
-				}
-				
-				$text .= "
    1. \n";
-				$text .= $footnote . "\n";
-				$text .= "
      2. \n\n";
-			}
-			
-			$text .= "
    \n";
-			$text .= "
    ";
-		}
-		return $text;
-	}
-	function _appendFootnotes_callback($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])) {
-			# Transfert footnote content to the ordered list.
-			$this->footnotes_ordered[$node_id] = $this->footnotes[$node_id];
-			unset($this->footnotes[$node_id]);
-			
-			$num = $this->footnote_counter++;
-			$attr = " rel=\"footnote\"";
-			if ($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
-				"".
-				"$num".
-				"";
-		}
-		
-		return "[^".$matches[1]."]";
-	}
-		
-	
-	### Abbreviations ###
-	
-	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 $text;
-	}
-	function _stripAbbreviations_callback($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($abbr_desc);
-		return ''; # String that will replace the block
-	}
-	
-	
-	function doAbbreviations($text) {
-	#
-	# Find defined abbreviations in text and wrap them in  elements.
-	#
-		if ($this->abbr_word_re) {
-			// cannot use the /x modifier because abbr_word_re may 
-			// contain significant spaces:
-			$text = preg_replace_callback('{'.
-				'(?abbr_word_re.')'.
-				'(?![\w\x1A])'.
-				'}', 
-				array(&$this, '_doAbbreviations_callback'), $text);
-		}
-		return $text;
-	}
-	function _doAbbreviations_callback($matches) {
-		$abbr = $matches[0];
-		if (isset($this->abbr_desciptions[$abbr])) {
-			$desc = $this->abbr_desciptions[$abbr];
-			if (empty($desc)) {
-				return $this->hashPart("$abbr");
-			} else {
-				$desc = $this->encodeAttribute($desc);
-				return $this->hashPart("$abbr");
-			}
-		} else {
-			return $matches[0];
-		}
-	}
-
-}
-
-
-/*
-
-PHP Markdown Extra
-==================
-
-Description
------------
-
-This is a PHP port of the original Markdown formatter written in Perl 
-by John Gruber. This special "Extra" version of PHP Markdown features 
-further enhancements to the syntax for making additional constructs 
-such as tables and definition list.
-
-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 
     and  as well).
-
-For more information about Markdown's syntax, see:
-
-
-
-
-Bugs
-----
-
-To file bug reports please send email to:
-
-
-
-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.
-
-
-Copyright and License
----------------------
-
-PHP Markdown & Extra  
-Copyright (c) 2004-2009 Michel Fortin  
-  
-All rights reserved.
-
-Based on Markdown  
-Copyright (c) 2003-2006 John Gruber   
-   
-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.
-
-*/
-?>
\ No newline at end of file
diff --git a/vendor/michelf/php-markdown/Michelf/MarkdownExtra.php b/vendor/michelf/php-markdown/Michelf/MarkdownExtra.php
new file mode 100644
index 000000000..0e3275ff2
--- /dev/null
+++ b/vendor/michelf/php-markdown/Michelf/MarkdownExtra.php
@@ -0,0 +1,2932 @@
+
+#
+# Original Markdown
+# Copyright (c) 2004-2006 John Gruber  
+# 
+#
+
+
+define( 'MARKDOWN_VERSION',  "1.0.1o" ); # Sun 8 Jan 2012
+define( 'MARKDOWNEXTRA_VERSION',  "1.2.5" ); # Sun 8 Jan 2012
+
+
+#
+# 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 );
+
+# Optional title attribute for footnote links and backlinks.
+@define( 'MARKDOWN_FN_LINK_TITLE',         "" );
+@define( 'MARKDOWN_FN_BACKLINK_TITLE',     "" );
+
+# Optional class attribute for footnote links and backlinks.
+@define( 'MARKDOWN_FN_LINK_CLASS',         "" );
+@define( 'MARKDOWN_FN_BACKLINK_CLASS',     "" );
+
+
+#
+# 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',  'MarkdownExtra_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 Extra
+Plugin URI: http://michelf.com/projects/php-markdown/
+Description: Markdown syntax allows you to write using an easy-to-read, easy-to-write plain text format. Based on the original Perl version by John Gruber. More...
+Version: 1.2.5
+Author: Michel Fortin
+Author URI: http://michelf.com/
+*/
+
+if (isset($wp_version)) {
+	# More details about how it works here:
+	# 
+	
+	# Post content and excerpts
+	# - Remove WordPress paragraph generator.
+	# - Run Markdown on excerpt, then remove all tags.
+	# - Add paragraph tag around the excerpt, but remove it for the excerpt rss.
+	if (MARKDOWN_WP_POSTS) {
+		remove_filter('the_content',     'wpautop');
+        remove_filter('the_content_rss', 'wpautop');
+		remove_filter('the_excerpt',     'wpautop');
+		add_filter('the_content',     'mdwp_MarkdownPost', 6);
+        add_filter('the_content_rss', 'mdwp_MarkdownPost', 6);
+		add_filter('get_the_excerpt', 'mdwp_MarkdownPost', 6);
+		add_filter('get_the_excerpt', 'trim', 7);
+		add_filter('the_excerpt',     'mdwp_add_p');
+		add_filter('the_excerpt_rss', 'mdwp_strip_p');
+		
+		remove_filter('content_save_pre',  'balanceTags', 50);
+		remove_filter('excerpt_save_pre',  'balanceTags', 50);
+		add_filter('the_content',  	  'balanceTags', 50);
+		add_filter('get_the_excerpt', 'balanceTags', 9);
+	}
+	
+	# Add a footnote id prefix to posts when inside a loop.
+	function mdwp_MarkdownPost($text) {
+		static $parser;
+		if (!$parser) {
+			$parser_class = MARKDOWN_PARSER_CLASS;
+			$parser = new $parser_class;
+		}
+		if (is_single() || is_page() || is_feed()) {
+			$parser->fn_id_prefix = "";
+		} else {
+			$parser->fn_id_prefix = get_the_ID() . ".";
+		}
+		return $parser->transform($text);
+	}
+	
+	# 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', 30);
+		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 $mdwp_hidden_tags, $mdwp_placeholders;
+		$mdwp_hidden_tags = explode(' ',
+			'
     
     
     
     
       
     
       
     
  •  
    • ');
+		$mdwp_placeholders = explode(' ', str_rot13(
+			'pEj07ZbbBZ U1kqgh4w4p pre2zmeN6K QTi31t9pre ol0MP1jzJR '.
+			'ML5IjmbRol ulANi1NsGY J7zRLJqPul liA8ctl16T K9nhooUHli'));
+	}
+	
+	function mdwp_add_p($text) {
+		if (!preg_match('{^$|^<(p|ul|ol|dl|pre|blockquote)>}i', $text)) {
+			$text = '
    '.$text.'
    ';
+			$text = preg_replace('{\n{2,}}', "
    \n\n
    ", $text);
+		}
+		return $text;
+	}
+	
+	function mdwp_strip_p($t) { return preg_replace('{}i', '', $t); }
+
+	function mdwp_hide_tags($text) {
+		global $mdwp_hidden_tags, $mdwp_placeholders;
+		return str_replace($mdwp_hidden_tags, $mdwp_placeholders, $text);
+	}
+	function mdwp_show_tags($text) {
+		global $mdwp_hidden_tags, $mdwp_placeholders;
+		return str_replace($mdwp_placeholders, $mdwp_hidden_tags, $text);
+	}
+}
+
+
+### bBlog Plugin Info ###
+
+function identify_modifier_markdown() {
+	return array(
+		'name' => 'markdown',
+		'type' => 'modifier',
+		'nicename' => 'PHP Markdown Extra',
+		'description' => 'A text-to-HTML conversion tool for web writers',
+		'authors' => 'Michel Fortin and John Gruber',
+		'licence' => 'GPL',
+		'version' => MARKDOWNEXTRA_VERSION,
+		'help' => 'Markdown syntax allows you to write using an easy-to-read, easy-to-write plain text format. Based on the original Perl version by John Gruber. More...',
+		);
+}
+
+
+### Smarty Modifier Interface ###
+
+function smarty_modifier_markdown($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 $text;
+		}
+		# Fake restricted version: restrictions are not supported for now.
+		function TextileRestricted($text, $lite='', $noimage='') {
+			return $this->TextileThis($text, $lite);
+		}
+		# Workaround to ensure compatibility with TextPattern 4.0.3.
+		function blockLite($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_re;
+	
+	var $nested_url_parenthesis_depth = 4;
+	var $nested_url_parenthesis_re;
+
+	# Table of hash values for escaped characters:
+	var $escape_chars = '\`*_{}[]()>#+-.!';
+	var $escape_chars_re;
+
+	# Change to ">" for HTML output.
+	var $empty_element_suffix = MARKDOWN_EMPTY_ELEMENT_SUFFIX;
+	var $tab_width = MARKDOWN_TAB_WIDTH;
+	
+	# Change to `true` to disallow markup or entities.
+	var $no_markup = false;
+	var $no_entities = false;
+	
+	# Predefined urls and titles for reference links and images.
+	var $predef_urls = array();
+	var $predef_titles = array();
+
+
+	function Markdown_Parser() {
+	#
+	# 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.
+	var $urls = array();
+	var $titles = array();
+	var $html_hashes = array();
+	
+	# Status flag to avoid invalid nesting.
+	var $in_anchor = false;
+	
+	
+	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();
+		
+		$in_anchor = false;
+	}
+	
+	function teardown() {
+	#
+	# Called after the transformation process to clear any variable 
+	# which may be taking up memory unnecessarly.
+	#
+		$this->urls = array();
+		$this->titles = array();
+		$this->html_hashes = array();
+	}
+
+
+	function transform($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";
+	}
+	
+	var $document_gamut = array(
+		# Strip link definitions, store in hashes.
+		"stripLinkDefinitions" => 20,
+		
+		"runBasicBlockGamut"   => 30,
+		);
+
+
+	function stripLinkDefinitions($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 $text;
+	}
+	function _stripLinkDefinitions_callback($matches) {
+		$link_id = strtolower($matches[1]);
+		$url = $matches[2] == '' ? $matches[3] : $matches[2];
+		$this->urls[$link_id] = $url;
+		$this->titles[$link_id] =& $matches[4];
+		return ''; # String that will replace the block
+	}
+
+
+	function hashHTMLBlocks($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 
    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|form|fieldset|iframe|math';
+
+		# 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('
+					  	# 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.:
+		# 	
    
+		# 		
    
+		# 		tags for inner block must be indented.
+		# 		
    
+		# 	
    
+		#
+		# 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 `
    ` and stop at the first `
    `.
+		$text = preg_replace_callback('{(?>
+			(?>
+				(?<=\n\n)		# Starting after a blank line
+				|				# or
+				\A\n?			# the beginning of the doc
+			)
+			(						# save in $1
+
+			  # Match from `\n` to `\n`, handling nested tags 
+			  # in between.
+					
+						[ ]{0,'.$less_than_tab.'}
+						<('.$block_tags_b_re.')# start tag = $2
+						'.$attr.'>			# attributes followed by > and \n
+						'.$content.'		# content, support nesting
+										# the matching end tag
+						[ ]*				# trailing spaces/tabs
+						(?=\n+|\Z)	# followed by a newline or end of document
+
+			| # Special version for tags of group a.
+
+						[ ]{0,'.$less_than_tab.'}
+						<('.$block_tags_a_re.')# start tag = $3
+						'.$attr.'>[ ]*\n	# attributes followed by >
+						'.$content2.'		# content, support nesting
+										# the matching end tag
+						[ ]*				# trailing spaces/tabs
+						(?=\n+|\Z)	# followed by a newline or end of document
+					
+			| # Special case just for 
    . It was easier to make a special 
+			  # case than to make the other regex more complicated.
+			
+						[ ]{0,'.$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,'.$less_than_tab.'}
+					(?s:
+						
+					)
+					[ ]*
+					(?=\n{2,}|\Z)		# followed by a blank line or end of document
+			
+			| # PHP and ASP-style processor instructions (
+					)
+					[ ]*
+					(?=\n{2,}|\Z)		# followed by a blank line or end of document
+					
+			)
+			)}Sxmi',
+			array(&$this, '_hashHTMLBlocks_callback'),
+			$text);
+
+		return $text;
+	}
+	function _hashHTMLBlocks_callback($matches) {
+		$text = $matches[1];
+		$key  = $this->hashBlock($text);
+		return "\n\n$key\n\n";
+	}
+	
+	
+	function hashPart($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 $key; # String that will replace the tag.
+	}
+
+
+	function hashBlock($text) {
+	#
+	# Shortcut function for hashPart with block-level boundaries.
+	#
+		return $this->hashPart($text, 'B');
+	}
+
+
+	var $block_gamut = array(
+	#
+	# These are all the transformations that form block-level
+	# tags like paragraphs, headers, and list items.
+	#
+		"doHeaders"         => 10,
+		"doHorizontalRules" => 20,
+		
+		"doLists"           => 40,
+		"doCodeBlocks"      => 50,
+		"doBlockQuotes"     => 60,
+		);
+
+	function runBlockGamut($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);
+	}
+	
+	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 $text;
+	}
+	
+	
+	function doHorizontalRules($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("empty_element_suffix")."\n", 
+			$text);
+	}
+
+
+	var $span_gamut = array(
+	#
+	# These are all the transformations that occur *within* block-level
+	# tags like paragraphs, headers, and list items.
+	#
+		# Process character escapes, code spans, and inline HTML
+		# in one shot.
+		"parseSpan"           => -30,
+
+		# Process anchor and image tags. Images must come first,
+		# because ![foo][f] looks like an anchor.
+		"doImages"            =>  10,
+		"doAnchors"           =>  20,
+		
+		# Make links out of things like ``
+		# Must come after doAnchors, because you can use < and >
+		# delimiters in inline links like [this]().
+		"doAutoLinks"         =>  30,
+		"encodeAmpsAndAngles" =>  40,
+
+		"doItalicsAndBold"    =>  50,
+		"doHardBreaks"        =>  60,
+		);
+
+	function runSpanGamut($text) {
+	#
+	# Run span gamut tranformations.
+	#
+		foreach ($this->span_gamut as $method => $priority) {
+			$text = $this->$method($text);
+		}
+
+		return $text;
+	}
+	
+	
+	function doHardBreaks($text) {
+		# Do hard breaks:
+		return preg_replace_callback('/ {2,}\n/', 
+			array(&$this, '_doHardBreaks_callback'), $text);
+	}
+	function _doHardBreaks_callback($matches) {
+		return $this->hashPart("empty_element_suffix\n");
+	}
+
+
+	function doAnchors($text) {
+	#
+	# Turn Markdown link shortcuts into XHTML  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 $text;
+	}
+	function _doAnchors_reference_callback($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 = $this->encodeAttribute($url);
+			
+			$result = "titles[$link_id] ) ) {
+				$title = $this->titles[$link_id];
+				$title = $this->encodeAttribute($title);
+				$result .=  " title=\"$title\"";
+			}
+		
+			$link_text = $this->runSpanGamut($link_text);
+			$result .= ">$link_text";
+			$result = $this->hashPart($result);
+		}
+		else {
+			$result = $whole_match;
+		}
+		return $result;
+	}
+	function _doAnchors_inline_callback($matches) {
+		$whole_match	=  $matches[1];
+		$link_text		=  $this->runSpanGamut($matches[2]);
+		$url			=  $matches[3] == '' ? $matches[4] : $matches[3];
+		$title			=& $matches[7];
+
+		$url = $this->encodeAttribute($url);
+
+		$result = "encodeAttribute($title);
+			$result .=  " title=\"$title\"";
+		}
+		
+		$link_text = $this->runSpanGamut($link_text);
+		$result .= ">$link_text";
+
+		return $this->hashPart($result);
+	}
+
+
+	function doImages($text) {
+	#
+	# Turn Markdown image shortcuts into  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 $text;
+	}
+	function _doImages_reference_callback($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 = $this->encodeAttribute($this->urls[$link_id]);
+			$result = "\"$alt_text\"";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 $result;
+	}
+	function _doImages_inline_callback($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 = $this->encodeAttribute($url);
+		$result = "\"$alt_text\"";encodeAttribute($title);
+			$result .=  " title=\"$title\""; # $title already quoted
+		}
+		$result .= $this->empty_element_suffix;
+
+		return $this->hashPart($result);
+	}
+
+
+	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 $text;
+	}
+	function _doHeaders_callback_setext($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;
+		$block = "".$this->runSpanGamut($matches[1])."";
+		return "\n" . $this->hashBlock($block) . "\n\n";
+	}
+	function _doHeaders_callback_atx($matches) {
+		$level = strlen($matches[1]);
+		$block = "".$this->runSpanGamut($matches[2])."";
+		return "\n" . $this->hashBlock($block) . "\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_re  = '[*+-]';
+		$marker_ol_re  = '\d+[\.]';
+		$marker_any_re = "(?:$marker_ul_re|$marker_ol_re)";
+
+		$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 $text;
+	}
+	function _doLists_callback($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 . "");
+		return "\n". $result ."\n\n";
+	}
+
+	var $list_level = 0;
+
+	function processListItems($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 $list_str;
+	}
+	function _processListItems_callback($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 "
  • " . $item . "
    • \n";
+	}
+
+
+	function doCodeBlocks($text) {
+	#
+	#	Process Markdown `
    ` 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 $text;
+	}
+	function _doCodeBlocks_callback($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 = "
    $codeblock\n
    ";
+		return "\n\n".$this->hashBlock($codeblock)."\n\n";
+	}
+
+
+	function makeCodeSpan($code) {
+	#
+	# Create a code span markup for $code. Called from handleSpanToken.
+	#
+		$code = htmlspecialchars(trim($code), ENT_NOQUOTES);
+		return $this->hashPart("$code");
+	}
+
+
+	var $em_relist = array(
+		''  => '(?:(? '(?<=\S|^)(? '(?<=\S|^)(? '(?:(? '(?<=\S|^)(? '(?<=\S|^)(? '(?:(? '(?<=\S|^)(? '(?<=\S|^)(?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"] = $token_re;
+			}
+		}
+	}
+	
+	function doItalicsAndBold($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);
+					$span = "$span";
+					$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";
+					$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";
+						$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);
+					$span = "$span";
+					$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);
+						$span = "$span";
+						$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 $text_stack[0];
+	}
+
+
+	function doBlockQuotes($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 $text;
+	}
+	function _doBlockQuotes_callback($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 
     content, 
+		# so we need to fix that:
+		$bq = preg_replace_callback('{(\s*
    .+?
    )}sx', 
+			array(&$this, '_doBlockQuotes_callback2'), $bq);
+
+		return "\n". $this->hashBlock("
    \n$bq\n
    ")."\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 
     tags
+	#
+		# Strip leading and trailing lines:
+		$text = preg_replace('/\A\n+|\n+\z/', '', $text);
+
+		$grafs = preg_split('/\n{2,}/', $text, -1, PREG_SPLIT_NO_EMPTY);
+
+		#
+		# Wrap 
     tags and unhashify HTML blocks
+		#
+		foreach ($grafs as $key => $value) {
+			if (!preg_match('/^B\x1A[0-9]+B$/', $value)) {
+				# Is a paragraph.
+				$value = $this->runSpanGamut($value);
+				$value = preg_replace('/^([ ]*)/', "
    ", $value);
+				$value .= "
    ";
+				$grafs[$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 = 
     tag
+//					  
    ]*
+//					  \b
+//					  markdown\s*=\s*  ([\'"])	#	$2 = attr quote char
+//					  1
+//					  \2
+//					  [^>]*
+//					  >
+//					)
+//					(							# $3 = contents
+//					.*
+//					)
+//					(
    )					# $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", $grafs);
+	}
+
+
+	function encodeAttribute($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('"', '"', $text);
+		return $text;
+	}
+	
+	
+	function encodeAmpsAndAngles($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('&', '&', $text);
+		} else {
+			# Ampersand-encoding based entirely on Nat Irons's Amputator
+			# MT plugin: 
+			$text = preg_replace('/&(?!#?[xX]?(?:[0-9a-fA-F]+|\w+);)/', 
+								'&', $text);;
+		}
+		# Encode remaining <'s
+		$text = str_replace('<', '<', $text);
+
+		return $text;
+	}
+
+
+	function doAutoLinks($text) {
+		$text = preg_replace_callback('{<((https?|ftp|dict):[^\'">\s]+)>}i', 
+			array(&$this, '_doAutoLinks_url_callback'), $text);
+
+		# Email addresses: 
+		$text = preg_replace_callback('{
+			<
+			(?:mailto:)?
+			(
+				(?:
+					[-!#$%&\'*+/=?^_`.{|}~\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 $text;
+	}
+	function _doAutoLinks_url_callback($matches) {
+		$url = $this->encodeAttribute($matches[1]);
+		$link = "$url";
+		return $this->hashPart($link);
+	}
+	function _doAutoLinks_email_callback($matches) {
+		$address = $matches[1];
+		$link = $this->encodeEmailAddress($address);
+		return $this->hashPart($link);
+	}
+
+
+	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.:
+	#
+	#	  
    foo@exampl
+	#        e.com
    
+	#
+	#	Based by a filter by Matthew Wickline, posted to BBEdit-Talk.
+	#   With some optimizations by Milian Wolff.
+	#
+		$addr = "mailto:" . $addr;
+		$chars = preg_split('/(? $char) {
+			$ord = ord($char);
+			# Ignore non-ascii chars.
+			if ($ord < 128) {
+				$r = ($seed * (1 + $key)) % 100; # Pseudo-random function.
+				# roughly 10% raw, 45% hex, 45% dec
+				# '@' *must* be encoded. I insist.
+				if ($r > 90 && $char != '@') /* do nothing */;
+				else if ($r < 45) $chars[$key] = '&#x'.dechex($ord).';';
+				else              $chars[$key] = '&#'.$ord.';';
+			}
+		}
+		
+		$addr = implode('', $chars);
+		$text = implode('', array_slice($chars, 7)); # text without `mailto:`
+		$addr = "$text";
+
+		return $addr;
+	}
+
+
+	function parseSpan($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.'
+				|
+					(?no_markup ? '' : '
+				|
+							# comment
+				|
+					<\?.*?\?> | <%.*?%>		# processing instruction
+				|
+					<[/!$]?[-a-zA-Z0-9:_]+	# regular tags
+					(?>
+						\s
+						(?>[^"\'>]+|"[^"]*"|\'[^\']*\')*
+					)?
+					>
+			').'
+				)
+				}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 $output;
+	}
+	
+	
+	function handleSpanToken($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);
+		}
+	}
+
+
+	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.
+	var $utf8_strlen = 'mb_strlen';
+	
+	function detab($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 $text;
+	}
+	function _detab_callback($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 $line;
+	}
+	function _initDetab() {
+	#
+	# Check for the availability of the function in the `utf8_strlen` property
+	# (initially `mb_strlen`). If the function is not available, create a 
+	# function that will loosely count the number of UTF-8 characters with a
+	# regular expression.
+	#
+		if (function_exists($this->utf8_strlen)) return;
+		$this->utf8_strlen = create_function('$text', 'return preg_match_all(
+			"/[\\\\x00-\\\\xBF]|[\\\\xC0-\\\\xFF][\\\\x80-\\\\xBF]*/", 
+			$text, $m);');
+	}
+
+
+	function unhash($text) {
+	#
+	# Swap back in all the tags hashed by _HashHTMLBlocks.
+	#
+		return preg_replace_callback('/(.)\x1A[0-9]+\1/', 
+			array(&$this, '_unhash_callback'), $text);
+	}
+	function _unhash_callback($matches) {
+		return $this->html_hashes[$matches[0]];
+	}
+
+}
+
+
+#
+# Markdown Extra Parser Class
+#
+
+class MarkdownExtra_Parser extends Markdown_Parser {
+
+	# Prefix for footnote ids.
+	var $fn_id_prefix = "";
+	
+	# Optional title attribute for footnote links and backlinks.
+	var $fn_link_title = MARKDOWN_FN_LINK_TITLE;
+	var $fn_backlink_title = MARKDOWN_FN_BACKLINK_TITLE;
+	
+	# Optional class attribute for footnote links and backlinks.
+	var $fn_link_class = MARKDOWN_FN_LINK_CLASS;
+	var $fn_backlink_class = MARKDOWN_FN_BACKLINK_CLASS;
+	
+	# Predefined abbreviations.
+	var $predef_abbr = array();
+
+
+	function MarkdownExtra_Parser() {
+	#
+	# 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::Markdown_Parser();
+	}
+	
+	
+	# Extra variables used during extra transformations.
+	var $footnotes = array();
+	var $footnotes_ordered = array();
+	var $abbr_desciptions = array();
+	var $abbr_word_re = '';
+	
+	# Give the current footnote number.
+	var $footnote_counter = 1;
+	
+	
+	function setup() {
+	#
+	# Setting up Extra-specific variables.
+	#
+		parent::setup();
+		
+		$this->footnotes = array();
+		$this->footnotes_ordered = 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);
+		}
+	}
+	
+	function teardown() {
+	#
+	# Clearing Extra-specific variables.
+	#
+		$this->footnotes = array();
+		$this->footnotes_ordered = array();
+		$this->abbr_desciptions = array();
+		$this->abbr_word_re = '';
+		
+		parent::teardown();
+	}
+	
+	
+	### HTML Block Parser ###
+	
+	# Tags that are always treated as block tags:
+	var $block_tags_re = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|address|form|fieldset|iframe|hr|legend';
+	
+	# Tags treated as block tags only if the opening tag is alone on it's line:
+	var $context_block_tags_re = 'script|noscript|math|ins|del';
+	
+	# Tags where markdown="1" default to span mode:
+	var $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:
+	var $clean_tags_re = 'script|math';
+	
+	# Tags that do not need to be closed.
+	var $auto_close_tags_re = 'hr|img';
+	
+
+	function hashHTMLBlocks($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 
    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 whitin 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!
+	#
+		#
+		# Call the HTML-in-Markdown hasher.
+		#
+		list($text, ) = $this->_hashHTMLBlocks_inMarkdown($text);
+		
+		return $text;
+	}
+	function _hashHTMLBlocks_inMarkdown($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:
+	#
+	#     
    
+	#         
    
+	#         Hello World.  <-- Is this a Markdown code block or text?
+	#         
      <-- Is this a Markdown code block or a real tag?
+	#     
    
+	#
+	#     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 =
+			'{
+				(					# $2: Capture hole tag.
+									# Tag name.
+							'.$this->block_tags_re.'			|
+							'.$this->context_block_tags_re.'	|
+							'.$this->clean_tags_re.'        	|
+							(?!\s)'.$enclosing_tag_re.'
+						)
+						(?:
+							(?=[\s"\'/a-zA-Z0-9])	# Allowed characters after tag name.
+							(?>
+								".*?"		|	# Double quotes (can contain `>`)
+								\'.*?\'   	|	# Single quotes (can contain `>`)
+								.+?				# Anything but quotes and `>`.
+							)*?
+						)?
+					>					# End of tag.
+				|
+						# HTML Comment
+				|
+					<\?.*?\?> | <%.*?%>	# Processing instruction
+				|
+						# CData Block
+				|
+					# Code span marker
+					`+
+				'. ( !$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).'}~~~+[ ]*\n
+				' : '' ). ' # End (if not is span).
+				)
+			}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: Code span marker
+			#
+			if ($tag{0} == "`") {
+				# Find corresponding end marker.
+				$tag_re = preg_quote($tag);
+				if (preg_match('{^(?>.+?|\n(?!\n))*?(?.*\n)+?[ ]{0,'.($indent).'}'.$tag_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 .= $tag;
+			}
+			#
+			# Check for: Opening Block level tag or
+			#            Opening Context Block tag (like ins and del) 
+			#               used as a block tag (tag is alone on it's line).
+			#
+			else if (preg_match('{^<(?:'.$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('{^= 0);
+		
+		return array($parsed, $text);
+	}
+	function _hashHTMLBlocks_inHTML($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 hole tag.
+					
+								".*?"		|	# Double quotes (can contain `>`)
+								\'.*?\'   	|	# Single quotes (can contain `>`)
+								.+?				# Anything but quotes and `>`.
+							)*?
+						)?
+					>					# End of tag.
+				|
+						# HTML Comment
+				|
+					<\?.*?\?> | <%.*?%>	# Processing instruction
+				|
+						# 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 
    )
+			#			 Comments and Processing Instructions.
+			#
+			if (preg_match('{^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('{^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 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, $text);
+	}
+
+
+	function hashClean($text) {
+	#
+	# Called whenever a tag must be hashed when a function insert a "clean" tag
+	# in $text, it pass through this function and is automaticaly escaped, 
+	# blocking invalid nested overlap.
+	#
+		return $this->hashPart($text, 'C');
+	}
+
+
+	function doHeaders($text) {
+	#
+	# Redefined to add id attribute support.
+	#
+		# Setext-style headers:
+		#	  Header 1  {#header1}
+		#	  ========
+		#  
+		#	  Header 2  {#header2}
+		#	  --------
+		#
+		$text = preg_replace_callback(
+			'{
+				(^.+?)								# $1: Header text
+				(?:[ ]+\{\#([-_:a-zA-Z0-9]+)\})?	# $2: Id attribute
+				[ ]*\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}
+		#	...
+		#	###### Header 6   {#header2}
+		#
+		$text = preg_replace_callback('{
+				^(\#{1,6})	# $1 = string of #\'s
+				[ ]*
+				(.+?)		# $2 = Header text
+				[ ]*
+				\#*			# optional closing #\'s (not counted)
+				(?:[ ]+\{\#([-_:a-zA-Z0-9]+)\})? # id attribute
+				[ ]*
+				\n+
+			}xm',
+			array(&$this, '_doHeaders_callback_atx'), $text);
+
+		return $text;
+	}
+	function _doHeaders_attr($attr) {
+		if (empty($attr))  return "";
+		return " id=\"$attr\"";
+	}
+	function _doHeaders_callback_setext($matches) {
+		if ($matches[3] == '-' && preg_match('{^- }', $matches[1]))
+			return $matches[0];
+		$level = $matches[3]{0} == '=' ? 1 : 2;
+		$attr  = $this->_doHeaders_attr($id =& $matches[2]);
+		$block = "".$this->runSpanGamut($matches[1])."";
+		return "\n" . $this->hashBlock($block) . "\n\n";
+	}
+	function _doHeaders_callback_atx($matches) {
+		$level = strlen($matches[1]);
+		$attr  = $this->_doHeaders_attr($id =& $matches[3]);
+		$block = "".$this->runSpanGamut($matches[2])."";
+		return "\n" . $this->hashBlock($block) . "\n\n";
+	}
+
+
+	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 $text;
+	}
+	function _doTable_leadingPipe_callback($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, $content));
+	}
+	function _doTable_callback($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] = ' align="right"';
+			else if (preg_match('/^ *:-+: *$/', $s))$attr[$n] = ' align="center"';
+			else if (preg_match('/^ *:-+ *$/', $s))	$attr[$n] = ' align="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);
+		
+		# Write column headers.
+		$text = "
    \n";
+		$text .= "\n";
+		$text .= "\n";
+		foreach ($headers as $n => $header)
+			$text .= "  ".$this->runSpanGamut(trim($header))."\n";
+		$text .= "\n";
+		$text .= "\n";
+		
+		# Split content by row.
+		$rows = explode("\n", trim($content, "\n"));
+		
+		$text .= "\n";
+		foreach ($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, '');
+			
+			$text .= "\n";
+			foreach ($row_cells as $n => $cell)
+				$text .= "  ".$this->runSpanGamut(trim($cell))."\n";
+			$text .= "\n";
+		}
+		$text .= "\n";
+		$text .= "
    ";
+		
+		return $this->hashBlock($text) . "\n";
+	}
+
+	
+	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 $text;
+	}
+	function _doDefLists_callback($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 = "
    \n" . $result . "\n
    ";
+		return $this->hashBlock($result) . "\n\n";
+	}
+
+
+	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.'} [:][ ]	|
+					
     | \z
+				)						
+			)					
+			}xm',
+			array(&$this, '_processDefListItems_callback_dd'), $list_str);
+
+		return $list_str;
+	}
+	function _processDefListItems_callback_dt($matches) {
+		$terms = explode("\n", trim($matches[1]));
+		$text = '';
+		foreach ($terms as $term) {
+			$term = $this->runSpanGamut(trim($term));
+			$text .= "\n
    " . $term . "
    ";
+		}
+		return $text . "\n";
+	}
+	function _processDefListItems_callback_dd($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
    " . $def . "
    \n";
+	}
+
+
+	function doFencedCodeBlocks($text) {
+	#
+	# Adding the fenced code block syntax to regular Markdown:
+	#
+	# ~~~
+	# Code block
+	# ~~~
+	#
+		$less_than_tab = $this->tab_width;
+		
+		$text = preg_replace_callback('{
+				(?:\n|\A)
+				# 1: Opening marker
+				(
+					~{3,} # Marker: three tilde or more.
+				)
+				[ ]* \n # Whitespace and newline following marker.
+				
+				# 2: Content
+				(
+					(?>
+						(?!\1 [ ]* \n)	# Not a closing marker.
+						.*\n+
+					)+
+				)
+				
+				# Closing marker.
+				\1 [ ]* \n
+			}xm',
+			array(&$this, '_doFencedCodeBlocks_callback'), $text);
+
+		return $text;
+	}
+	function _doFencedCodeBlocks_callback($matches) {
+		$codeblock = $matches[2];
+		$codeblock = htmlspecialchars($codeblock, ENT_NOQUOTES);
+		$codeblock = preg_replace_callback('/^\n+/',
+			array(&$this, '_doFencedCodeBlocks_newlines'), $codeblock);
+		$codeblock = "
    $codeblock
    ";
+		return "\n\n".$this->hashBlock($codeblock)."\n\n";
+	}
+	function _doFencedCodeBlocks_newlines($matches) {
+		return str_repeat("empty_element_suffix", 
+			strlen($matches[0]));
+	}
+
+
+	#
+	# Redefining emphasis markers so that emphasis by underscore does not
+	# work in the middle of a word.
+	#
+	var $em_relist = array(
+		''  => '(?:(? '(?<=\S|^)(? '(?<=\S|^)(? '(?:(? '(?<=\S|^)(? '(?<=\S|^)(? '(?:(? '(?<=\S|^)(? '(?<=\S|^)(? tags
+	#
+		# Strip leading and trailing lines:
+		$text = preg_replace('/\A\n+|\n+\z/', '', $text);
+		
+		$grafs = preg_split('/\n{2,}/', $text, -1, PREG_SPLIT_NO_EMPTY);
+
+		#
+		# Wrap 
     tags and unhashify HTML blocks
+		#
+		foreach ($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 = "
    $value
    ";
+			}
+			$grafs[$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 $text;
+	}
+	
+	
+	### Footnotes
+	
+	function stripFootnotes($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 marker.
+					(?!\n+[ ]{0,3}\S)# ensure line is not blank and followed 
+									# by non-indented content
+				)*
+			)		
+			}xm',
+			array(&$this, '_stripFootnotes_callback'),
+			$text);
+		return $text;
+	}
+	function _stripFootnotes_callback($matches) {
+		$note_id = $this->fn_id_prefix . $matches[1];
+		$this->footnotes[$note_id] = $this->outdent($matches[2]);
+		return ''; # String that will replace the block
+	}
+
+
+	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 $text;
+	}
+
+	
+	function appendFootnotes($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 .= "
    \n";
+			$text .= "empty_element_suffix ."\n";
+			$text .= "
      \n\n";
+			
+			$attr = " rev=\"footnote\"";
+			if ($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]);
+				
+				$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);
+				
+				# Add backlink to last paragraph; create new paragraph if needed.
+				$backlink = "↩";
+				if (preg_match('{
      $}', $footnote)) {
+					$footnote = substr($footnote, 0, -4) . " $backlink
      ";
+				} else {
+					$footnote .= "\n\n
      $backlink
      ";
+				}
+				
+				$text .= "
    1. \n";
+				$text .= $footnote . "\n";
+				$text .= "
      2. \n\n";
+			}
+			
+			$text .= "
    \n";
+			$text .= "
    ";
+		}
+		return $text;
+	}
+	function _appendFootnotes_callback($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])) {
+			# Transfert footnote content to the ordered list.
+			$this->footnotes_ordered[$node_id] = $this->footnotes[$node_id];
+			unset($this->footnotes[$node_id]);
+			
+			$num = $this->footnote_counter++;
+			$attr = " rel=\"footnote\"";
+			if ($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
+				"".
+				"$num".
+				"";
+		}
+		
+		return "[^".$matches[1]."]";
+	}
+		
+	
+	### Abbreviations ###
+	
+	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 $text;
+	}
+	function _stripAbbreviations_callback($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($abbr_desc);
+		return ''; # String that will replace the block
+	}
+	
+	
+	function doAbbreviations($text) {
+	#
+	# Find defined abbreviations in text and wrap them in  elements.
+	#
+		if ($this->abbr_word_re) {
+			// cannot use the /x modifier because abbr_word_re may 
+			// contain significant spaces:
+			$text = preg_replace_callback('{'.
+				'(?abbr_word_re.')'.
+				'(?![\w\x1A])'.
+				'}', 
+				array(&$this, '_doAbbreviations_callback'), $text);
+		}
+		return $text;
+	}
+	function _doAbbreviations_callback($matches) {
+		$abbr = $matches[0];
+		if (isset($this->abbr_desciptions[$abbr])) {
+			$desc = $this->abbr_desciptions[$abbr];
+			if (empty($desc)) {
+				return $this->hashPart("$abbr");
+			} else {
+				$desc = $this->encodeAttribute($desc);
+				return $this->hashPart("$abbr");
+			}
+		} else {
+			return $matches[0];
+		}
+	}
+
+}
+
+
+/*
+
+PHP Markdown Extra
+==================
+
+Description
+-----------
+
+This is a PHP port of the original Markdown formatter written in Perl 
+by John Gruber. This special "Extra" version of PHP Markdown features 
+further enhancements to the syntax for making additional constructs 
+such as tables and definition list.
+
+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 
     and  as well).
+
+For more information about Markdown's syntax, see:
+
+
+
+
+Bugs
+----
+
+To file bug reports please send email to:
+
+
+
+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.
+
+
+Copyright and License
+---------------------
+
+PHP Markdown & Extra  
+Copyright (c) 2004-2009 Michel Fortin  
+  
+All rights reserved.
+
+Based on Markdown  
+Copyright (c) 2003-2006 John Gruber   
+   
+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.
+
+*/
+?>
\ No newline at end of file
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