/system/vendor/Markdown.php
PHP | 2789 lines | 1608 code | 364 blank | 817 comment | 134 complexity | 897c99061ba8b17bc0b39a8f64382ca8 MD5 | raw file
- <?php
- #
- # Markdown Extra - A text-to-HTML conversion tool for web writers
- #
- # PHP Markdown & Extra
- # Copyright (c) 2004-2007 Michel Fortin
- # <http://www.michelf.com/projects/php-markdown/>
- #
- # Original Markdown
- # Copyright (c) 2004-2006 John Gruber
- # <http://daringfireball.net/projects/markdown/>
- #
- define( 'MARKDOWN_VERSION', "1.0.1h" ); # Fri 3 Aug 2007
- define( 'MARKDOWNEXTRA_VERSION', "1.1.4" ); # Fri 3 Aug 2007
- #
- # 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://www.michelf.com/projects/php-markdown/
- Description: <a href="http://daringfireball.net/projects/markdown/syntax">Markdown syntax</a> allows you to write using an easy-to-read, easy-to-write plain text format. Based on the original Perl version by <a href="http://daringfireball.net/">John Gruber</a>. <a href="http://www.michelf.com/projects/php-markdown/">More...</a>
- Version: 1.1.4
- Author: Michel Fortin
- Author URI: http://www.michelf.com/
- */
- if (isset($wp_version)) {
- # More details about how it works here:
- # <http://www.michelf.com/weblog/2005/wordpress-text-flow-vs-markdown/>
-
- # Post content and excerpts
- # - Remove WordPress paragraph generator.
- # - Run Markdown on excerpt, then remove all tags.
- # - Add paragraph tag around the excerpt, but remove it for the excerpt rss.
- if (MARKDOWN_WP_POSTS) {
- remove_filter('the_content', 'wpautop');
- remove_filter('the_content_rss', 'wpautop');
- remove_filter('the_excerpt', 'wpautop');
- add_filter('the_content', 'Markdown', 6);
- add_filter('the_content_rss', 'Markdown', 6);
- add_filter('get_the_excerpt', 'Markdown', 6);
- add_filter('get_the_excerpt', 'trim', 7);
- add_filter('the_excerpt', 'mdwp_add_p');
- add_filter('the_excerpt_rss', 'mdwp_strip_p');
-
- remove_filter('content_save_pre', 'balanceTags', 50);
- remove_filter('excerpt_save_pre', 'balanceTags', 50);
- add_filter('the_content', 'balanceTags', 50);
- add_filter('get_the_excerpt', 'balanceTags', 9);
- }
-
- # Comments
- # - Remove WordPress paragraph generator.
- # - Remove WordPress auto-link generator.
- # - Scramble important tags before passing them to the kses filter.
- # - Run Markdown on excerpt then remove paragraph tags.
- if (MARKDOWN_WP_COMMENTS) {
- remove_filter('comment_text', 'wpautop', 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(' ',
- '<p> </p> <pre> </pre> <ol> </ol> <ul> </ul> <li> </li>');
- $mdwp_placeholders = explode(' ', str_rot13(
- 'pEj07ZbbBZ U1kqgh4w4p pre2zmeN6K QTi31t9pre ol0MP1jzJR '.
- 'ML5IjmbRol ulANi1NsGY J7zRLJqPul liA8ctl16T K9nhooUHli'));
- }
-
- function mdwp_add_p($text) {
- if (!preg_match('{^$|^<(p|ul|ol|dl|pre|blockquote)>}i', $text)) {
- $text = '<p>'.$text.'</p>';
- $text = preg_replace('{\n{2,}}', "</p>\n\n<p>", $text);
- }
- return $text;
- }
-
- function mdwp_strip_p($t) { return preg_replace('{</?p>}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, $text);
- }
- }
- ### bBlog Plugin Info ###
- function identify_modifier_markdown() {
- return array(
- 'name' => 'markdown',
- 'type' => 'modifier',
- 'nicename' => 'PHP Markdown Extra',
- 'description' => 'A text-to-HTML conversion tool for web writers',
- 'authors' => 'Michel Fortin and John Gruber',
- 'licence' => 'GPL',
- 'version' => MARKDOWNEXTRA_VERSION,
- 'help' => '<a href="http://daringfireball.net/projects/markdown/syntax">Markdown syntax</a> allows you to write using an easy-to-read, easy-to-write plain text format. Based on the original Perl version by <a href="http://daringfireball.net/">John Gruber</a>. <a href="http://www.michelf.com/projects/php-markdown/">More...</a>',
- );
- }
- ### Smarty Modifier Interface ###
- function smarty_modifier_markdown($text) {
- return Markdown($text);
- }
- ### Textile Compatibility Mode ###
- # Rename this file to "classTextile.php" and it can replace Textile everywhere.
- if (strcasecmp(substr(__FILE__, -16), "classTextile.php") == 0) {
- # Try to include PHP SmartyPants. Should be in the same directory.
- @include_once 'smartypants.php';
- # Fake Textile class. It calls Markdown instead.
- class Textile {
- function TextileThis($text, $lite='', $encode='') {
- if ($lite == '' && $encode == '') $text = Markdown($text);
- if (function_exists('SmartyPants')) $text = SmartyPants($text);
- return $text;
- }
- # Fake restricted version: restrictions are not supported for now.
- function TextileRestricted($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;
-
- var $nested_url_parenthesis_depth = 4;
- var $nested_url_parenthesis;
- # Table of hash values for escaped characters:
- var $escape_chars = '\`*_{}[]()>#+-.!';
- // var $escape_table = array();
- var $backslash_escape_table = array();
- # Change to ">" for HTML output.
- var $empty_element_suffix = MARKDOWN_EMPTY_ELEMENT_SUFFIX;
- var $tab_width = MARKDOWN_TAB_WIDTH;
-
- # Change to `true` to disallow markup or entities.
- var $no_markup = false;
- var $no_entities = false;
- function Markdown_Parser() {
- #
- # Constructor function. Initialize appropriate member variables.
- #
- $this->_initDetab();
-
- $this->nested_brackets =
- str_repeat('(?>[^\[\]]+|\[', $this->nested_brackets_depth).
- str_repeat('\])*', $this->nested_brackets_depth);
-
- $this->nested_url_parenthesis =
- str_repeat('(?>[^()\s]+|\(', $this->nested_url_parenthesis_depth).
- str_repeat('(?>\)))*', $this->nested_url_parenthesis_depth);
-
- # Create an identical table but for escaped characters.
- foreach (preg_split('/(?!^|$)/', $this->escape_chars) as $char) {
- $entity = "&#". ord($char). ";";
- // $this->escape_table[$char] = $entity;
- $this->backslash_escape_table["\\$char"] = $entity;
- }
-
- # Sort document, block, and span gamut in ascendent priority order.
- asort($this->document_gamut);
- asort($this->block_gamut);
- asort($this->span_gamut);
- }
- # Internal hashes used during transformation.
- var $urls = array();
- var $titles = array();
- var $html_blocks = array();
- var $html_hashes = array(); # Contains both blocks and span hashes.
-
- # Status flag to avoid invalid nesting.
- var $in_anchor = false;
- function transform($text) {
- #
- # Main function. The order in which other subs are called here is
- # essential. Link and image substitutions need to happen before
- # _EscapeSpecialCharsWithinTagAttributes(), so that any *'s or _'s in the <a>
- # and <img> tags get encoded.
- #
- # Clear the global hashes. If we don't clear these, you get conflicts
- # from other articles when generating a page which contains more than
- # one article (e.g. an index page that shows the N most recent
- # articles):
- $this->urls = array();
- $this->titles = array();
- $this->html_blocks = array();
- $this->html_hashes = array();
- # Standardize line endings:
- # DOS to Unix and Mac to Unix
- $text = str_replace(array("\r\n", "\r"), "\n", $text);
- # Make sure $text ends with a couple of newlines:
- $text .= "\n\n";
- # Convert all tabs to spaces.
- $text = $this->detab($text);
- # 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);
- }
- 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
- [ ]*
- <?(\S+?)>? # url = $2
- [ ]*
- \n? # maybe one newline
- [ ]*
- (?:
- (?<=\s) # lookbehind for whitespace
- ["(]
- (.*?) # title = $3
- [")]
- [ ]*
- )? # title is optional
- (?:\n+|\Z)
- }xm',
- array(&$this, '_stripLinkDefinitions_callback'),
- $text);
- return $text;
- }
- function _stripLinkDefinitions_callback($matches) {
- $link_id = strtolower($matches[1]);
- $this->urls[$link_id] = $this->encodeAmpsAndAngles($matches[2]);
- if (isset($matches[3]))
- $this->titles[$link_id] = str_replace('"', '"', $matches[3]);
- return ''; # String that will replace the block
- }
- function hashHTMLBlocks($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 <p>s around
- # "paragraphs" that are wrapped in non-block-level tags, such as anchors,
- # phrase emphasis, and spans. The list of tags we're looking for is
- # hard-coded:
- $block_tags_a = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|address|'.
- 'script|noscript|form|fieldset|iframe|math|ins|del';
- $block_tags_b = '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('
- </\2\s*> # closing nested tag
- )
- |
- <(?!/\2\s*> # other tags with a different name
- )
- )*',
- $nested_tags_level);
- # First, look for nested blocks, e.g.:
- # <div>
- # <div>
- # tags for inner block must be indented.
- # </div>
- # </div>
- #
- # The outermost tags must start at the left margin for this to match, and
- # the inner nested divs must be indented.
- # We need to do this before the next, more liberal match, because the next
- # match will start at the first `<div>` and stop at the first `</div>`.
- $text = preg_replace_callback('{
- ( # save in $1
- ^ # start of line (with /m)
- <('.$block_tags_a.')# start tag = $2
- '.$attr.'>\n # attributes followed by > and \n
- '.$content.' # content, support nesting
- </\2> # the matching end tag
- [ ]* # trailing spaces/tabs
- (?=\n+|\Z) # followed by a newline or end of document
- )
- }xmi',
- array(&$this, '_hashHTMLBlocks_callback'),
- $text);
- #
- # Match from `\n<tag>` to `</tag>\n`, handling nested tags in between.
- #
- $text = preg_replace_callback('{
- ( # save in $1
- ^ # start of line (with /m)
- <('.$block_tags_b.')# start tag = $2
- '.$attr.'> # attributes followed by >
- '.$content.' # content, support nesting
- </\2> # the matching end tag
- [ ]* # trailing spaces/tabs
- (?=\n+|\Z) # followed by a newline or end of document
- )
- }xmi',
- array(&$this, '_hashHTMLBlocks_callback'),
- $text);
- # Special case just for <hr />. It was easier to make a special case than
- # to make the other regex more complicated.
- $text = preg_replace_callback('{
- (?:
- (?<=\n\n) # Starting after a blank line
- | # or
- \A\n? # the beginning of the doc
- )
- ( # save in $1
- [ ]{0,'.$less_than_tab.'}
- <(hr) # start tag = $2
- \b # word break
- ([^<>])*? #
- /?> # the matching end tag
- [ ]*
- (?=\n{2,}|\Z) # followed by a blank line or end of document
- )
- }xi',
- array(&$this, '_hashHTMLBlocks_callback'),
- $text);
- # Special case for standalone HTML comments:
- $text = preg_replace_callback('{
- (?:
- (?<=\n\n) # Starting after a blank line
- | # or
- \A\n? # the beginning of the doc
- )
- ( # save in $1
- [ ]{0,'.$less_than_tab.'}
- (?s:
- <!-- .*? -->
- )
- [ ]*
- (?=\n{2,}|\Z) # followed by a blank line or end of document
- )
- }x',
- array(&$this, '_hashHTMLBlocks_callback'),
- $text);
- # PHP and ASP-style processor instructions (<? and <%)
- $text = preg_replace_callback('{
- (?:
- (?<=\n\n) # Starting after a blank line
- | # or
- \A\n? # the beginning of the doc
- )
- ( # save in $1
- [ ]{0,'.$less_than_tab.'}
- (?s:
- <([?%]) # $2
- .*?
- \2>
- )
- [ ]*
- (?=\n{2,}|\Z) # followed by a blank line or end of document
- )
- }x',
- array(&$this, '_hashHTMLBlocks_callback'),
- $text);
- return $text;
- }
- function _hashHTMLBlocks_callback($matches) {
- $text = $matches[1];
- $key = $this->hashBlock($text);
- return "\n\n$key\n\n";
- }
- function hashBlock($text) {
- #
- # Called whenever a tag must be hashed when a function insert a block-level
- # tag in $text, it pass through this function and is automaticaly escaped,
- # which remove the need to call _HashHTMLBlocks at every step.
- #
- # 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.
- $key = "B\x1A". md5($text);
- $this->html_hashes[$key] = $text;
- $this->html_blocks[$key] = $text;
- return $key; # String that will replace the tag.
- }
- function hashSpan($text, $word_separator = false) {
- #
- # Called whenever a tag must be hashed when a function insert a span-level
- # element in $text, it pass through this function and is automaticaly
- # escaped, blocking invalid nested overlap. If optional argument
- # $word_separator is true, surround the hash value by spaces.
- #
- # 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 span.
- $key = "S\x1A". md5($text);
- if ($word_separator) $key = ":$key:";
-
- $this->html_hashes[$key] = $text;
- return $key; # String that will replace the span tag.
- }
- 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(
- array('{^[ ]{0,2}([ ]?\*[ ]?){3,}[ ]*$}mx',
- '{^[ ]{0,2}([ ]? -[ ]?){3,}[ ]*$}mx',
- '{^[ ]{0,2}([ ]? _[ ]?){3,}[ ]*$}mx'),
- "\n".$this->hashBlock("<hr$this->empty_element_suffix")."\n",
- $text);
- }
- var $span_gamut = array(
- #
- # These are all the transformations that occur *within* block-level
- # tags like paragraphs, headers, and list items.
- #
- "escapeSpecialCharsWithinTagAttributes" => -20,
- "doCodeSpans" => -10,
- "encodeBackslashEscapes" => -5,
- # Process anchor and image tags. Images must come first,
- # because ![foo][f] looks like an anchor.
- "doImages" => 10,
- "doAnchors" => 20,
-
- # Make links out of things like `<http://example.com/>`
- # Must come after doAnchors, because you can use < and >
- # delimiters in inline links like [this](<url>).
- "doAutoLinks" => 30,
- "encodeAmpsAndAngles" => 40,
- "doItalicsAndBold" => 50,
- "doHardBreaks" => 60,
- );
- function runSpanGamut($text) {
- #
- # Run span gamut tranformations.
- #
- foreach ($this->span_gamut as $method => $priority) {
- $text = $this->$method($text);
- }
- return $text;
- }
-
-
- function doHardBreaks($text) {
- # Do hard breaks:
- $br_tag = $this->hashSpan("<br$this->empty_element_suffix\n");
- return preg_replace('/ {2,}\n/', $br_tag, $text);
- }
- function escapeSpecialCharsWithinTagAttributes($text) {
- #
- # Within tags -- meaning between < and > -- encode [\ ` * _] so they
- # don't conflict with their use in Markdown for code, italics and strong.
- # We're replacing each such character with its corresponding MD5 checksum
- # value; this is likely overkill, but it should prevent us from colliding
- # with the escape values by accident.
- #
- if ($this->no_markup) return $text;
-
- $tokens = $this->tokenizeHTML($text);
- $text = ''; # rebuild $text from the tokens
- foreach ($tokens as $cur_token) {
- if ($cur_token[0] == 'tag') {
- // $cur_token[1] = str_replace('\\', $this->escape_table['\\'], $cur_token[1]);
- // $cur_token[1] = str_replace('`', $this->escape_table['`'], $cur_token[1]);
- // $cur_token[1] = str_replace('*', $this->escape_table['*'], $cur_token[1]);
- // $cur_token[1] = str_replace('_', $this->escape_table['_'], $cur_token[1]);
- $cur_token[1] = $this->hashSpan($cur_token[1]);
- }
- $text .= $cur_token[1];
- }
- return $text;
- }
- function doAnchors($text) {
- #
- # Turn Markdown link shortcuts into XHTML <a> tags.
- #
- if ($this->in_anchor) return $text;
- $this->in_anchor = true;
-
- #
- # First, handle reference-style links: [link text] [id]
- #
- $text = preg_replace_callback('{
- ( # wrap whole match in $1
- \[
- ('.$this->nested_brackets.') # link text = $2
- \]
- [ ]? # one optional space
- (?:\n[ ]*)? # one optional newline followed by spaces
- \[
- (.*?) # id = $3
- \]
- )
- }xs',
- array(&$this, '_doAnchors_reference_callback'), $text);
- #
- # Next, inline-style links: [link text](url "optional title")
- #
- $text = preg_replace_callback('{
- ( # wrap whole match in $1
- \[
- ('.$this->nested_brackets.') # link text = $2
- \]
- \( # literal paren
- [ ]*
- (?:
- <(\S*)> # href = $3
- |
- ('.$this->nested_url_parenthesis.') # href = $4
- )
- [ ]*
- ( # $5
- ([\'"]) # quote char = $6
- (.*?) # Title = $7
- \6 # matching quote
- [ ]* # ignore any spaces/tabs between closing quote and )
- )? # title is optional
- \)
- )
- }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 test][1]
- # or [link test](/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 = $this->encodeAmpsAndAngles($url);
-
- $result = "<a href=\"$url\"";
- if ( isset( $this->titles[$link_id] ) ) {
- $title = $this->titles[$link_id];
- $title = $this->encodeAmpsAndAngles($title);
- $result .= " title=\"$title\"";
- }
-
- $link_text = $this->runSpanGamut($link_text);
- $result .= ">$link_text</a>";
- $result = $this->hashSpan($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 = $this->encodeAmpsAndAngles($url);
- $result = "<a href=\"$url\"";
- if (isset($title)) {
- $title = str_replace('"', '"', $title);
- $title = $this->encodeAmpsAndAngles($title);
- $result .= " title=\"$title\"";
- }
-
- $link_text = $this->runSpanGamut($link_text);
- $result .= ">$link_text</a>";
- return $this->hashSpan($result);
- }
- function doImages($text) {
- #
- # Turn Markdown image shortcuts into <img> tags.
- #
- #
- # First, handle reference-style labeled images: ![alt text][id]
- #
- $text = preg_replace_callback('{
- ( # wrap whole match in $1
- !\[
- ('.$this->nested_brackets.') # alt text = $2
- \]
- [ ]? # one optional space
- (?:\n[ ]*)? # one optional newline followed by spaces
- \[
- (.*?) # id = $3
- \]
- )
- }xs',
- array(&$this, '_doImages_reference_callback'), $text);
- #
- # Next, handle inline images: ![alt text](url "optional title")
- # Don't forget: encode * and _
- #
- $text = preg_replace_callback('{
- ( # wrap whole match in $1
- !\[
- ('.$this->nested_brackets.') # alt text = $2
- \]
- \s? # One optional whitespace character
- \( # literal paren
- [ ]*
- (?:
- <(\S*)> # src url = $3
- |
- ('.$this->nested_url_parenthesis.') # src url = $4
- )
- [ ]*
- ( # $5
- ([\'"]) # quote char = $6
- (.*?) # title = $7
- \6 # matching quote
- [ ]*
- )? # title is optional
- \)
- )
- }xs',
- array(&$this, '_doImages_inline_callback'), $text);
- return $text;
- }
- function _doImages_reference_callback($matches) {
- $whole_match = $matches[1];
- $alt_text = $matches[2];
- $link_id = strtolower($matches[3]);
- if ($link_id == "") {
- $link_id = strtolower($alt_text); # for shortcut links like ![this][].
- }
- $alt_text = str_replace('"', '"', $alt_text);
- if (isset($this->urls[$link_id])) {
- $url = $this->urls[$link_id];
- $result = "<img src=\"$url\" alt=\"$alt_text\"";
- if (isset($this->titles[$link_id])) {
- $title = $this->titles[$link_id];
- $result .= " title=\"$title\"";
- }
- $result .= $this->empty_element_suffix;
- $result = $this->hashSpan($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 = str_replace('"', '"', $alt_text);
- $result = "<img src=\"$url\" alt=\"$alt_text\"";
- if (isset($title)) {
- $title = str_replace('"', '"', $title);
- $result .= " title=\"$title\""; # $title already quoted
- }
- $result .= $this->empty_element_suffix;
- return $this->hashSpan($result);
- }
- function doHeaders($text) {
- # Setext-style headers:
- # Header 1
- # ========
- #
- # Header 2
- # --------
- #
- $text = preg_replace_callback('{ ^(.+?)[ ]*\n=+[ ]*\n+ }mx',
- array(&$this, '_doHeaders_callback_setext_h1'), $text);
- $text = preg_replace_callback('{ ^(.+?)[ ]*\n-+[ ]*\n+ }mx',
- array(&$this, '_doHeaders_callback_setext_h2'), $text);
- # atx-style headers:
- # # Header 1
- # ## Header 2
- # ## Header 2 with closing hashes ##
- # ...
- # ###### Header 6
- #
- $text = preg_replace_callback('{
- ^(\#{1,6}) # $1 = string of #\'s
- [ ]*
- (.+?) # $2 = Header text
- [ ]*
- \#* # optional closing #\'s (not counted)
- \n+
- }xm',
- array(&$this, '_doHeaders_callback_atx'), $text);
- return $text;
- }
- function _doHeaders_callback_setext_h1($matches) {
- $block = "<h1>".$this->runSpanGamut($matches[1])."</h1>";
- return "\n" . $this->hashBlock($block) . "\n\n";
- }
- function _doHeaders_callback_setext_h2($matches) {
- $block = "<h2>".$this->runSpanGamut($matches[1])."</h2>";
- return "\n" . $this->hashBlock($block) . "\n\n";
- }
- function _doHeaders_callback_atx($matches) {
- $level = strlen($matches[1]);
- $block = "<h$level>".$this->runSpanGamut($matches[2])."</h$level>";
- return "\n" . $this->hashBlock($block) . "\n\n";
- }
- function doLists($text) {
- #
- # Form HTML ordered (numbered) and unordered (bulleted) lists.
- #
- $less_than_tab = $this->tab_width - 1;
- # Re-usable patterns to match list item bullets and number markers:
- $marker_ul = '[*+-]';
- $marker_ol = '\d+[.]';
- $marker_any = "(?:$marker_ul|$marker_ol)";
- $markers = array($marker_ul, $marker_ol);
- foreach ($markers as $marker) {
- # Re-usable pattern to match any entirel ul or ol list:
- $whole_list = '
- ( # $1 = whole list
- ( # $2
- [ ]{0,'.$less_than_tab.'}
- ('.$marker.') # $3 = first list item marker
- [ ]+
- )
- (?s:.+?)
- ( # $4
- \z
- |
- \n{2,}
- (?=\S)
- (?! # Negative lookahead for another list item marker
- [ ]*
- '.$marker.'[ ]+
- )
- )
- )
- '; // mx
-
- # We use a different prefix before nested lists than top-level lists.
- # See extended comment in _ProcessListItems().
-
- if ($this->list_level) {
- $text = preg_replace_callback('{
- ^
- '.$whole_list.'
- }mx',
- array(&$this, '_doLists_callback'), $text);
- }
- else {
- $text = preg_replace_callback('{
- (?:(?<=\n)\n|\A\n?) # Must eat the newline
- '.$whole_list.'
- }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 = '[*+-]';
- $marker_ol = '\d+[.]';
- $marker_any = "(?:$marker_ul|$marker_ol)";
-
- $list = $matches[1];
- $list_type = preg_match("/$marker_ul/", $matches[3]) ? "ul" : "ol";
-
- $marker_any = ( $list_type == "ul" ? $marker_ul : $marker_ol );
-
- $list .= "\n";
- $result = $this->processListItems($list, $marker_any);
-
- $result = $this->hashBlock("<$list_type>\n" . $result . "</$list_type>");
- return "\n". $result ."\n\n";
- }
- var $list_level = 0;
- function processListItems($list_str, $marker_any) {
- #
- # Process the contents of a single ordered or unordered list, splitting it
- # into individual list items.
- #
- # The $this->list_level global keeps track of when we're inside a list.
- # Each time we enter a list, we increment it; when we leave a list,
- # we decrement. If it's zero, we're not in a list anymore.
- #
- # We do this because when we're not inside a list, we want to treat
- # something like this:
- #
- # I recommend upgrading to version
- # 8. Oops, now this line is treated
- # as a sub-list.
- #
- # As a single paragraph, despite the fact that the second line starts
- # with a digit-period-space sequence.
- #
- # Whereas when we're inside a list (or sub-list), that line will be
- # treated as the start of a sub-list. What a kludge, huh? This is
- # an aspect of Markdown's syntax that's hard to parse perfectly
- # without resorting to mind-reading. Perhaps the solution is to
- # change the syntax rules such that sub-lists must start with a
- # starting cardinal number; e.g. "1." or "a.".
-
- $this->list_level++;
- # trim trailing blank lines:
- $list_str = preg_replace("/\n{2,}\\z/", "\n", $list_str);
- $list_str = preg_replace_callback('{
- (\n)? # leading line = $1
- (^[ ]*) # leading whitespace = $2
- ('.$marker_any.') [ ]+ # list marker = $3
- ((?s:.+?)) # list item text = $4
- (?:(\n+(?=\n))|\n) # tailing blank line = $5
- (?= \n* (\z | \2 ('.$marker_any.') [ ]+))
- }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];
- $tailing_blank_line =& $matches[5];
- if ($leading_line || $tailing_blank_line ||
- preg_match('/\n{2,}/', $item))
- {
- $item = $this->runBlockGamut($this->outdent($item)."\n");
- }
- else {
- # Recursion for sub-lists:
- $item = $this->doLists($this->outdent($item));
- $item = preg_replace('/\n+$/', '', $item);
- $item = $this->runSpanGamut($item);
- }
- return "<li>" . $item . "</li>\n";
- }
- function doCodeBlocks($text) {
- #
- # Process Markdown `<pre><code>` blocks.
- #
- $text = preg_replace_callback('{
- (?:\n\n|\A)
- ( # $1 = the code block -- one or more lines, starting with a space/tab
- (?:
- (?:[ ]{'.$this->tab_width.'} | \t) # Lines must start with a tab or a tab-width of spaces
- .*\n+
- )+
- )
- ((?=^[ ]{0,'.$this->tab_width.'}\S)|\Z) # Lookahead for non-space at line-start, or end of doc
- }xm',
- array(&$this, '_doCodeBlocks_callback'), $text);
- return $text;
- }
- function _doCodeBlocks_callback($matches) {
- $codeblock = $matches[1];
- $codeblock = $this->encodeCode($this->outdent($codeblock));
- // $codeblock = $this->detab($codeblock);
- # trim leading newlines and trailing whitespace
- $codeblock = preg_replace(array('/\A\n+/', '/\n+\z/'), '', $codeblock);
- $result = "\n\n".$this->hashBlock("<pre><code>" . $codeblock . "\n</code></pre>")."\n\n";
- return $result;
- }
- function doCodeSpans($text) {
- #
- # * Backtick quotes are used for <code></code> spans.
- #
- # * You can use multiple backticks as the delimiters if you want to
- # include literal backticks in the code span. So, this input:
- #
- # Just type ``foo `bar` baz`` at the prompt.
- #
- # Will translate to:
- #
- # <p>Just type <code>foo `bar` baz</code> at the prompt.</p>
- #
- # There's no arbitrary limit to the number of backticks you
- # can use as delimters. If you need three consecutive backticks
- # in your code, use four for delimiters, etc.
- #
- # * You can use spaces to get literal backticks at the edges:
- #
- # ... type `` `bar` `` ...
- #
- # Turns to:
- #
- # ... type <code>`bar`</code> ...
- #
- $text = preg_replace_callback('@
- (?<!\\\) # Character before opening ` can\'t be a backslash
- (`+) # $1 = Opening run of `
- (.+?) # $2 = The code block
- (?<!`)
- \1 # Matching closer
- (?!`)
- @xs',
- array(&$this, '_doCodeSpans_callback'), $text);
- return $text;
- }
- function _doCodeSpans_callback($matches) {
- $c = $matches[2];
- $c = preg_replace('/^[ ]*/', '', $c); # leading whitespace
- $c = preg_replace('/[ ]*$/', '', $c); # trailing whitespace
- $c = $this->encodeCode($c);
- return $this->hashSpan("<code>$c</code>");
- }
- function encodeCode($_) {
- #
- # Encode/escape certain characters inside Markdown code runs.
- # The point is that in code, these characters are literals,
- # and lose their special Markdown meanings.
- #
- # Encode all ampersands; HTML entities are not
- # entities within a Markdown code span.
- $_ = str_replace('&', '&', $_);
- # Do the angle bracket song and dance:
- $_ = str_replace(array('<', '>'),
- array('<', '>'), $_);
- # Now, escape characters that are magic in Markdown:
- // $_ = str_replace(array_keys($this->escape_table),
- // array_values($this->escape_table), $_);
- return $_;
- }
- function doItalicsAndBold($text) {
- # <strong> must go first:
- $text = preg_replace_callback('{
- ( # $1: Marker
- (?<!\*\*) \* | # (not preceded by two chars of
- (?<!__) _ # the same marker)
- )
- \1
- (?=\S) # Not followed by whitespace
- (?!\1\1) # or two others marker chars.
- ( # $2: Content
- (?>
- [^*_]+? # Anthing not em markers.
- |
- # Balence any regular emphasis inside.
- \1 (?=\S) .+? (?<=\S) \1
- |
- . # Allow unbalenced * and _.
- )+?
- )
- (?<=\S) \1\1 # End mark not preceded by whitespace.
- }sx',
- array(&$this, '_doItalicAndBold_strong_callback'), $text);
- # Then <em>:
- $text = preg_replace_callback(
- '{ ( (?<!\*)\* | (?<!_)_ ) (?=\S) (?! \1) (.+?) (?<=\S)(?<!\s(?=\1).) \1 }sx',
- array(&$this, '_doItalicAndBold_em_callback'), $text);
- return $text;
- }
- function _doItalicAndBold_em_callback($matches) {
- $text = $matches[2];
- $text = $this->runSpanGamut($text);
- return $this->hashSpan("<em>$text</em>");
- }
- function _doItalicAndBold_strong_callback($matches) {
- $text = $matches[2];
- $text = $this->runSpanGamut($text);
- return $this->hashSpan("<strong>$text</strong>");
- }
- 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
- $bq = preg_replace(array('/^[ ]*>[ ]?/m', '/^[ ]+$/m'), '', $bq);
- $bq = $this->runBlockGamut($bq); # recurse
- $bq = preg_replace('/^/m', " ", $bq);
- # These leading spaces cause problem with <pre> content,
- # so we need to fix that:
- $bq = preg_replace_callback('{(\s*<pre>.+?</pre>)}sx',
- array(&$this, '_DoBlockQuotes_callback2'), $bq);
- return "\n". $this->hashBlock("<blockquote>\n$bq\n</blockquote>")."\n\n";
- }
- function _doBlockQuotes_callback2($matches) {
- $pre = $matches[1];
- $pre = preg_replace('/^ /m', '', $pre);
- return $pre;
- }
- function formParagraphs($text) {
- #
- # Params:
- # $text - string to process with html <p> tags
- #
- # Strip leading and trailing lines:
- $text = preg_replace(array('/\A\n+/', '/\n+\z/'), '', $text);
- $grafs = preg_split('/\n{2,}/', $text, -1, PREG_SPLIT_NO_EMPTY);
- #
- # Wrap <p> tags.
- #
- foreach ($grafs as $key => $value) {
- if (!isset( $this->html_blocks[$value] )) {
- $value = $this->runSpanGamut($value);
- $value = preg_replace('/^([ ]*)/', "<p>", $value);
- $value .= "</p>";
- $grafs[$key] = $this->unhash($value);
- }
- }
- #
- # Unhashify HTML blocks
- #
- foreach ($grafs as $key => $graf) {
- # Modify elements of @grafs in-place...
- if (isset($this->html_blocks[$graf])) {
- $block = $this->html_blocks[$graf];
- $graf = $block;
- // if (preg_match('{
- // \A
- // ( # $1 = <div> tag
- // <div \s+
- // [^>]*
- // \b
- // markdown\s*=\s* ([\'"]) # $2 = attr quote char
- // 1
- // \2
- // [^>]*
- // >
- // )
- // ( # $3 = contents
- // .*
- // )
- // (</div>) # $4 = closing tag
- // \z
- // }xs', $block, $matches))
- // {
- // list(, $div_open, , $div_content, $div_close) = $matches;
- //
- // # We can't call Markdown(), because that resets the hash;
- // # that initialization code should be pulled into its own sub, though.
- // $div_content = $this->hashHTMLBlocks($div_content);
- //
- // # Run document gamut methods on the content.
- // foreach ($this->document_gamut as $method => $priority) {
- // $div_content = $this->$method($div_content);
- // }
- //
- // $div_open = preg_replace(
- // '{\smarkdown\s*=\s*([\'"]).+?\1}', '', $div_open);
- //
- // $graf = $div_open . "\n" . $div_content . "\n" . $div_close;
- // }
- $grafs[$key] = $graf;
- }
- }
- return implode("\n\n", $grafs);
- }
- function encodeAmpsAndAngles($text) {
- # Smart processing for ampersands and angle brackets that need to be encoded.
- if ($this->no_entities) {
- $text = str_replace('&', '&', $text);
- $text = str_replace('<', '<', $text);
- return $text;
- }
- # Ampersand-encoding based entirely on Nat Irons's Amputator MT plugin:
- # http://bumppo.net/projects/amputator/
- $text = preg_replace('/&(?!#?[xX]?(?:[0-9a-fA-F]+|\w+);)/',
- '&', $text);;
- # Encode naked <'s
- $text = preg_replace('{<(?![a-z/?\$!%])}i', '<', $text);
- return $text;
- }
- function encodeBackslashEscapes($text) {
- #
- # Parameter: String.
- # Returns: The string, with after processing the following backslash
- # escape sequences.
- #
- # Must process escaped backslashes first (should be first in list).
- foreach ($this->backslash_escape_table as $search => $replacement) {
- $text = str_replace($search, $this->hashSpan($replacement), $text);
- }
- return $text;
- }
- function doAutoLinks($text) {
- $text = preg_replace_callback('{<((https?|ftp|dict):[^\'">\s]+)>}',
- array(&$this, '_doAutoLinks_url_callback'), $text);
- # Email addresses: <address@domain.foo>
- $text = preg_replace_callback('{
- <
- (?:mailto:)?
- (
- [-.\w\x80-\xFF]+
- \@
- [-a-z0-9\x80-\xFF]+(\.[-a-z0-9\x80-\xFF]+)*\.[a-z]+
- )
- >
- }xi',
- array(&$this, '_doAutoLinks_email_callback'), $text);
- return $text;
- }
- function _doAutoLinks_url_callback($matches) {
- $url = $this->encodeAmpsAndAngles($matches[1]);
- $link = "<a href=\"$url\">$url</a>";
- return $this->hashSpan($link);
- }
- function _doAutoLinks_email_callback($matches) {
- $address = $matches[1];
- $link = $this->encodeEmailAddress($address);
- return $this->hashSpan($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.:
- #
- # <p><a href="mailto:foo
- # @example.co
- # m">foo@exampl
- # e.com</a></p>
- #
- # Based by a filter by Matthew Wickline, posted to BBEdit-Talk.
- # With some optimizations by Milian Wolff.
- #
- $addr = "mailto:" . $addr;
- $chars = preg_split('/(?<!^)(?!$)/', $addr);
- $seed = (int)abs(crc32($addr) / strlen($addr)); # Deterministic seed.
-
- foreach ($chars as $key => $char) {
- $ord = ord($char);
- # Ignore non-ascii chars.
- if ($ord < 128) {
- $r = ($seed * (1 + $key)) % 100; # Pseudo-random function.
- # roughly 10% raw, 45% hex, 45% dec
- # '@' *must* be encoded. I insist.
- if ($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:`
- $addr = "<a href=\"$addr\">$text</a>";
- return $addr;
- }
- function tokenizeHTML($str) {
- #
- # Parameter: String containing HTML + Markdown markup.
- # Returns: An array of the tokens comprising the input
- # string. Each token is either a tag or a run of text
- # between tags. Each element of the array is a
- # two-element array; the first is either 'tag' or 'text';
- # the second is the actual value.
- # Note: Markdown code spans are taken into account: no tag token is
- # generated within a code span.
- #
- $tokens = array();
- while ($str != "") {
- #
- # Each loop iteration seach for either the next tag or the next
- # openning code span marker. If a code span marker is found, the
- # code span is extracted in entierty and will result in an extra
- # text token.
- #
- $parts = preg_split('{
- (
- (?<![`\\\\])
- `+ # code span marker
- |
- <!-- .*? --> # comment
- |
- <\?.*?\?> | <%.*?%> # processing instruction
- |
- <[/!$]?[-a-zA-Z0-9:]+ # regular tags
- (?:
- \s
- (?>[^"\'>]+|"[^"]*"|\'[^\']*\')*
- )?
- >
- )
- }xs', $str, 2, PREG_SPLIT_DELIM_CAPTURE);
-
- # Create token from text preceding tag.
- if ($parts[0] != "") {
- $tokens[] = array('text', $parts[0]);
- }
-
- # Check if we reach the end.
- if (count($parts) < 3) {
- break;
- }
-
- # Create token from tag or code span.
- if ($parts[1]{0} == "`") {
- $tokens[] = array('text', $parts[1]);
- $str = $parts[2];
-
- # Skip the whole code span, pass as text token.
- if (preg_match('/^(.*(?<!`\\\\)'.$parts[1].'(?!`))(.*)$/sm',
- $str, $matches))
- {
- $tokens[] = array('text', $matches[1]);
- $str = $matches[2];
- }
- } else {
- $tokens[] = array('tag', $parts[1]);
- $str = $parts[2];
- }
- }
-
- return $tokens;
- }
- function outdent($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.
-
- $strlen = $this->utf8_strlen; # strlen function for UTF-8.
- $lines = explode("\n", $text);
- $text = "";
-
- foreach ($lines as $line) {
- # Split in blocks.
- $blocks = explode("\t", $line);
- # Add each blocks to the line.
- $line = $blocks[0];
- unset($blocks[0]); # Do not add first block twice.
- foreach ($blocks as $block) {
- # Calculate amount of space, insert spaces, insert block.
- $amount = $this->tab_width -
- $strlen($line, 'UTF-8') % $this->tab_width;
- $line .= str_repeat(" ", $amount) . $block;
- }
- $text .= "$line\n";
- }
- return $text;
- }
- function _initDetab() {
- #
- # Check for the availability of the function in the `utf8_strlen` property
- # (initially `mb_strlen`). If the function is not available, create a
- # function that will loosely count the number of UTF-8 characters with a
- # regular expression.
- #
- if (function_exists($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 str_replace(array_keys($this->html_hashes),
- array_values($this->html_hashes), $text);
- }
- }
- #
- # 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;
- 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(
- "stripFootnotes" => 15,
- "stripAbbreviations" => 25,
- "appendFootnotes" => 50,
- );
- $this->block_gamut += array(
- "doTables" => 15,
- "doDefLists" => 45,
- );
- $this->span_gamut += array(
- "doFootnotes" => 5,
- "doAbbreviations" => 70,
- );
-
- parent::Markdown_Parser();
- }
-
-
- # Extra hashes used during extra transformations.
- var $footnotes = array();
- var $footnotes_ordered = array();
- var $abbr_desciptions = array();
- var $abbr_matches = array();
- var $html_cleans = array();
-
- # Status flag to avoid invalid nesting.
- var $in_footnote = false;
-
-
- function transform($text) {
- #
- # Added clear to the new $html_hashes, reordered `hashHTMLBlocks` before
- # blank line stripping and added extra parameter to `runBlockGamut`.
- #
- # Clear the global hashes. If we don't clear these, you get conflicts
- # from other articles when generating a page which contains more than
- # one article (e.g. an index page that shows the N most recent
- # articles):
- $this->footnotes = array();
- $this->footnotes_ordered = array();
- $this->abbr_desciptions = array();
- $this->abbr_matches = array();
- $this->html_cleans = array();
- return parent::transform($text);
- }
-
-
- ### HTML Block Parser ###
-
- # Tags that are always treated as block tags:
- var $block_tags = '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 = 'script|noscript|math|ins|del';
-
- # Tags where markdown="1" default to span mode:
- var $contain_span_tags = '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 = 'script|math';
-
- # Tags that do not need to be closed.
- var $auto_close_tags = 'hr|img';
-
- function hashHTMLBlocks($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 <p>s around
- # "paragraphs" that are wrapped in non-block-level tags, such as anchors,
- # phrase emphasis, and spans. The list of tags we're looking for is
- # hard-coded.
- #
- # This works by calling _HashHTMLBlocks_InMarkdown, which then calls
- # _HashHTMLBlocks_InHTML when it encounter block tags. When the markdown="1"
- # attribute is found 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 = '', $span = false)
- {
- #
- # Parse markdown text, calling _HashHTMLBlocks_InHTML for block tags.
- #
- # * $indent is the number of space to be ignored when checking for code
- # blocks. This is important because if we don't take the indent into
- # account, something like this (which looks right) won't work as expected:
- #
- # <div>
- # <div markdown="1">
- # Hello World. <-- Is this a Markdown code block or text?
- # </div> <-- Is this a Markdown code block or a real tag?
- # <div>
- #
- # If you don't like this, just don't indent the tag on which
- # you apply the markdown="1" attribute.
- #
- # * If $enclosing_tag 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.
- $newline_match_before = '/(?:^\n?|\n\n)*$/';
- $newline_match_after =
- '{
- ^ # Start of text following the tag.
- (?:[ ]*<!--.*?-->)? # Optional comment.
- [ ]*\n # Must be followed by newline.
- }xs';
-
- # Regex to match any tag.
- $block_tag_match =
- '{
- ( # $2: Capture hole tag.
- </? # Any opening or closing tag.
- (?: # Tag name.
- '.$this->block_tags.' |
- '.$this->context_block_tags.' |
- '.$this->clean_tags.' |
- (?!\s)'.$enclosing_tag.'
- )
- \s* # Whitespace.
- (?>
- ".*?" | # Double quotes (can contain `>`)
- \'.*?\' | # Single quotes (can contain `>`)
- .+? # Anything but quotes and `>`.
- )*?
- > # End of tag.
- |
- <!-- .*? --> # HTML Comment
- |
- <\?.*?\?> | <%.*?%> # Processing instruction
- |
- <!\[CDATA\[.*?\]\]> # CData Block
- )
- }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_match, $text, 2,
- PREG_SPLIT_DELIM_CAPTURE);
-
- # If in Markdown span mode, add a empty-string span-level hash
- # after each newline to prevent triggering any block element.
- if ($span) {
- $void = $this->hashSpan("", true) ;
- $newline = $this->hashSpan("", true) . "\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 = $parts[2]; # Remaining text after current tag.
-
- #
- # Check for: Tag inside code block or span
- #
- if (# Find current paragraph
- preg_match('/(?>^\n?|\n\n)((?>.\n?)+?)$/', $parsed, $matches) &&
- (
- # Then match in it either a code block...
- preg_match('/^ {'.($indent+4).'}.*(?>\n {'.($indent+4).'}.*)*'.
- '(?!\n)$/', $matches[1], $x) ||
- # ...or unbalenced code span markers. (the regex matches balenced)
- !preg_match('/^(?>[^`]+|(`+)(?>[^`]+|(?!\1[^`])`)*?\1(?!`))*$/s',
- $matches[1])
- ))
- {
- # Tag is in code block or span and may not be a tag at all. So we
- # simply skip the first char (should be a `<`).
- $parsed .= $tag{0};
- $text = substr($tag, 1) . $text; # Put back $tag minus first char.
- }
- #
- # Check for: Opening Block level tag or
- # Opening Content Block tag (like ins and del)
- # used as a block tag (tag is alone on it's line).
- #
- else if (preg_match("{^<(?:$this->block_tags)\b}", $tag) ||
- ( preg_match("{^<(?:$this->context_block_tags)\b}", $tag) &&
- preg_match($newline_match_before, $parsed) &&
- preg_match($newline_match_after, $text) )
- )
- {
- # Need to parse tag and following text using the HTML parser.
- list($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)\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 !== '' &&
- # Same name as enclosing tag.
- preg_match("{^</?(?:$enclosing_tag)\b}", $tag))
- {
- #
- # Increase/decrease nested tag count.
- #
- if ($tag{1} == '/') $depth--;
- else if ($tag{strlen($tag)-2} != '/') $depth++;
- if ($depth < 0) {
- #
- # Going out of parent element. Clean up and break so we
- # return to the calling function.
- #
- $text = $tag . $text;
- break;
- }
-
- $parsed .= $tag;
- }
- else {
- $parsed .= $tag;
- }
- } while ($depth >= 0);
-
- return array($parsed, $text);
- }
- function _hashHTMLBlocks_inHTML($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_match = '
- {
- \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_match = '{
- ( # $2: Capture hole tag.
- </? # Any opening or closing tag.
- [\w:$]+ # Tag name.
- \s* # Whitespace.
- (?>
- ".*?" | # Double quotes (can contain `>`)
- \'.*?\' | # Single quotes (can contain `>`)
- .+? # Anything but quotes and `>`.
- )*?
- > # End of tag.
- |
- <!-- .*? --> # HTML Comment
- |
- <\?.*?\?> | <%.*?%> # Processing instruction
- |
- <!\[CDATA\[.*?\]\]> # CData Block
- )
- }xs';
-
- $original_text = $text; # Save original text in case of faliure.
-
- $depth = 0; # Current depth inside the tag tree.
- $block_text = ""; # Temporary text holder for current text.
- $parsed = ""; # Parsed text that will be returned.
- #
- # Get the name of the starting tag.
- #
- if (preg_match("/^<([\w:$]*)\b/", $text, $matches))
- $base_tag_name = $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_match, $text, 2, PREG_SPLIT_DELIM_CAPTURE);
-
- if (count($parts) < 3) {
- #
- # End of $text reached with unbalenced tag(s).
- # In that case, we return original text unchanged and pass the
- # first character as filtered to prevent an infinite loop in the
- # parent function.
- #
- return array($original_text{0}, substr($original_text, 1));
- }
-
- $block_text .= $parts[0]; # Text before current tag.
- $tag = $parts[1]; # Tag to handle.
- $text = $parts[2]; # Remaining text after current tag.
-
- #
- # Check for: Auto-close tag (like <hr/>)
- # Comments and Processing Instructions.
- #
- if (preg_match("{^</?(?:$this->auto_close_tags)\b}", $tag) ||
- $tag{1} == '!' || $tag{1} == '?')
- {
- # Just add the tag to the block as if it was text.
- $block_text .= $tag;
- }
- else {
- #
- # Increase/decrease nested tag count. Only do so if
- # the tag's name match base tag's.
- #
- if (preg_match("{^</?$base_tag_name\b}", $tag)) {
- if ($tag{1} == '/') $depth--;
- else if ($tag{strlen($tag)-2} != '/') $depth++;
- }
-
- #
- # Check for `markdown="1"` attribute and handle it.
- #
- if ($md_attr &&
- preg_match($markdown_attr_match, $tag, $attr_m) &&
- preg_match('/^1|block|span$/', $attr_m[2] . $attr_m[3]))
- {
- # Remove `markdown` attribute from opening tag.
- $tag = preg_replace($markdown_attr_match, '', $tag);
-
- # Check if text inside this tag must be parsed in span mode.
- $this->mode = $attr_m[2] . $attr_m[3];
- $span_mode = $this->mode == 'span' || $this->mode != 'block' &&
- preg_match("{^<(?:$this->contain_span_tags)\b}", $tag);
-
- # Calculate indent before tag.
- preg_match('/(?:^|\n)( *?)(?! ).*?$/', $block_text, $matches);
- $indent = strlen($matches[1]);
-
- # End preceding block with this tag.
- $block_text .= $tag;
- $parsed .= $this->$hash_method($block_text);
-
- # Get enclosing tag name for the ParseMarkdown function.
- preg_match('/^<([\w:$]*)\b/', $tag, $matches);
- $tag_name = $matches[1];
-
- # Parse the content using the HTML-in-Markdown parser.
- list ($block_text, $text)
- = $this->_hashHTMLBlocks_inMarkdown($text, $indent,
- $tag_name, $span_mode);
-
- # Outdent markdown text.
- if ($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.
- #
- # 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 tag.
- $key = "C\x1A". md5($text);
- $this->html_cleans[$key] = $text;
- $this->html_hashes[$key] = $text;
- return $key; # String that will replace the clean tag.
- }
- function doHeaders($text) {
- #
- # Redefined to add id attribute support.
- #
- # Setext-style headers:
- # Header 1 {#header1}
- # ========
- #
- # Header 2 {#header2}
- # --------
- #
- $text = preg_replace_callback(
- '{ (^.+?) (?:[ ]+\{\#([-_:a-zA-Z0-9]+)\})? [ ]*\n=+[ ]*\n+ }mx',
- array(&$this, '_doHeaders_callback_setext_h1'), $text);
- $text = preg_replace_callback(
- '{ (^.+?) (?:[ ]+\{\#([-_:a-zA-Z0-9]+)\})? [ ]*\n-+[ ]*\n+ }mx',
- array(&$this, '_doHeaders_callback_setext_h2'), $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_h1($matches) {
- $attr = $this->_doHeaders_attr($id =& $matches[2]);
- $block = "<h1$attr>".$this->runSpanGamut($matches[1])."</h1>";
- return "\n" . $this->hashBlock($block) . "\n\n";
- }
- function _doHeaders_callback_setext_h2($matches) {
- $attr = $this->_doHeaders_attr($id =& $matches[2]);
- $block = "<h2$attr>".$this->runSpanGamut($matches[1])."</h2>";
- return "\n" . $this->hashBlock($block) . "\n\n";
- }
- function _doHeaders_callback_atx($matches) {
- $level = strlen($matches[1]);
- $attr = $this->_doHeaders_attr($id =& $matches[3]);
- $block = "<h$level$attr>".$this->runSpanGamut($matches[2])."</h$level>";
- 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] = '';
- }
-
- # Creating code spans before splitting the row is an easy way to
- # handle a code span containg pipes.
- $head = $this->doCodeSpans($head);
- $headers = preg_split('/ *[|] */', $head);
- $col_count = count($headers);
-
- # Write column headers.
- $text = "<table>\n";
- $text .= "<thead>\n";
- $text .= "<tr>\n";
- foreach ($headers as $n => $header)
- $text .= " <th$attr[$n]>".$this->runSpanGamut(trim($header))."</th>\n";
- $text .= "</tr>\n";
- $text .= "</thead>\n";
-
- # Split content by row.
- $rows = explode("\n", trim($content, "\n"));
-
- $text .= "<tbody>\n";
- foreach ($rows as $row) {
- # Creating code spans before splitting the row is an easy way to
- # handle a code span containg pipes.
- $row = $this->doCodeSpans($row);
-
- # Split row by cell.
- $row_cells = preg_split('/ *[|] */', $row, $col_count);
- $row_cells = array_pad($row_cells, $col_count, '');
-
- $text .= "<tr>\n";
- foreach ($row_cells as $n => $cell)
- $text .= " <td$attr[$n]>".$this->runSpanGamut(trim($cell))."</td>\n";
- $text .= "</tr>\n";
- }
- $text .= "</tbody>\n";
- $text .= "</table>";
-
- return $this->hashBlock($text) . "\n";
- }
-
- 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 = '
- ( # $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
- $text = preg_replace_callback('{
- (?:(?<=\n\n)|\A\n?)
- '.$whole_list.'
- }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 = "<dl>\n" . $result . "\n</dl>";
- 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('{
- (?:\n\n+|\A\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 = $1
- [ ]{0,'.$less_than_tab.'} # whitespace before colon
- [:][ ]+ # definition mark (colon)
- ((?s:.+?)) # definition text = $2
- (?= \n+ # stop at next definition mark,
- (?: # next term or end of text
- [ ]{0,'.$less_than_tab.'} [:][ ] |
- <dt> | \z
- )
- )
- }xm',
- array(&$this, '_processDefListItems_callback_dd'), $list_str);
- return $list_str;
- }
- function _processDefListItems_callback_dt($matches) {
- $terms = explode("\n", trim($matches[1]));
- $text = '';
- foreach ($terms as $term) {
- $term = $this->runSpanGamut(trim($term));
- $text .= "\n<dt>" . $term . "</dt>";
- }
- return $text . "\n";
- }
- function _processDefListItems_callback_dd($matches) {
- $leading_line = $matches[1];
- $def = $matches[2];
- if ($leading_line || preg_match('/\n{2,}/', $def)) {
- $def = $this->runBlockGamut($this->outdent($def . "\n\n"));
- $def = "\n". $def ."\n";
- }
- else {
- $def = rtrim($def);
- $def = $this->runSpanGamut($this->outdent($def));
- }
- return "\n<dd>" . $def . "</dd>\n";
- }
- function doItalicsAndBold($text) {
- #
- # Redefined to change emphasis by underscore behaviour so that it does not
- # work in the middle of a word.
- #
- # <strong> must go first:
- $text = preg_replace_callback(array(
- '{
- ( # $1: Marker
- (?<![a-zA-Z0-9]) # Not preceded by alphanum
- (?<!__) # or by two marker chars.
- __
- )
- (?=\S) # Not followed by whitespace
- (?!__) # or two others marker chars.
- ( # $2: Content
- (?>
- [^_]+? # Anthing not em markers.
- |
- # Balence any regular _ emphasis inside.
- (?<![a-zA-Z0-9]) _ (?=\S) (.+?)
- (?<=\S) _ (?![a-zA-Z0-9])
- |
- _+ # Allow unbalenced as last resort.
- )+?
- )
- (?<=\S) __ # End mark not preceded by whitespace.
- (?![a-zA-Z0-9]) # Not followed by alphanum
- (?!__) # or two others marker chars.
- }sx',
- '{
- ( (?<!\*\*) \*\* ) # $1: Marker (not preceded by two *)
- (?=\S) # Not followed by whitespace
- (?!\1) # or two others marker chars.
- ( # $2: Content
- (?>
- [^*]+? # Anthing not em markers.
- |
- # Balence any regular * emphasis inside.
- \* (?=\S) (.+?) (?<=\S) \*
- |
- \* # Allow unbalenced as last resort.
- )+?
- )
- (?<=\S) \*\* # End mark not preceded by whitespace.
- }sx',
- ),
- array(&$this, '_doItalicAndBold_strong_callback'), $text);
- # Then <em>:
- $text = preg_replace_callback(array(
- '{ ( (?<![a-zA-Z0-9])(?<!_)_ ) (?=\S) (?! \1) (.+?) (?<=\S) \1(?![a-zA-Z0-9]) }sx',
- '{ ( (?<!\*)\* ) (?=\S) (?! \1) (.+?) (?<=\S)(?<!\s\*) \1 }sx',
- ),
- array(&$this, '_doItalicAndBold_em_callback'), $text);
- return $text;
- }
- function formParagraphs($text) {
- #
- # Params:
- # $text - string to process with html <p> tags
- #
- # Strip leading and trailing lines:
- $text = preg_replace(array('/\A\n+/', '/\n+\z/'), '', $text);
-
- $grafs = preg_split('/\n{2,}/', $text, -1, PREG_SPLIT_NO_EMPTY);
- #
- # Wrap <p> tags and unhashify HTML blocks
- #
- foreach ($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.
- $clean_key = $value;
- $block_key = substr($value, 0, 34);
-
- $is_p = (!isset($this->html_blocks[$block_key]) &&
- !isset($this->html_cleans[$clean_key]));
-
- if ($is_p) {
- $value = "<p>$value</p>";
- }
- $grafs[$key] = $value;
- }
-
- # Join grafs in one text, then unhash HTML tags.
- $text = implode("\n\n", $grafs);
-
- # Finish by removing any tag hashes still present in $text.
- $text = $this->unhash($text);
-
- return $text;
- }
-
-
- ### Footnotes
-
- function stripFootnotes($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 $text [^id] with a special text-token
- # which will be can be
- #
- if (!$this->in_footnote && !$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 .= "<div class=\"footnotes\">\n";
- $text .= "<hr". MARKDOWN_EMPTY_ELEMENT_SUFFIX ."\n";
- $text .= "<ol>\n\n";
-
- $attr = " rev=\"footnote\"";
- if ($this->fn_backlink_class != "") {
- $class = $this->fn_backlink_class;
- $class = $this->encodeAmpsAndAngles($class);
- $class = str_replace('"', '"', $class);
- $attr .= " class=\"$class\"";
- }
- if ($this->fn_backlink_title != "") {
- $title = $this->fn_backlink_title;
- $title = $this->encodeAmpsAndAngles($title);
- $title = str_replace('"', '"', $title);
- $attr .= " title=\"$title\"";
- }
- $num = 0;
-
- $this->in_footnote = true;
-
- foreach ($this->footnotes_ordered as $note_id => $footnote) {
- $footnote .= "\n"; # Need to append newline before parsing.
- $footnote = $this->runBlockGamut("$footnote\n");
-
- $attr2 = str_replace("%%", ++$num, $attr);
-
- # Add backlink to last paragraph; create new paragraph if needed.
- $backlink = "<a href=\"#fnref:$note_id\"$attr2>↩</a>";
- if (preg_match('{</p>$}', $footnote)) {
- $footnote = substr($footnote, 0, -4) . " $backlink</p>";
- } else {
- $footnote .= "\n\n<p>$backlink</p>";
- }
-
- $text .= "<li id=\"fn:$note_id\">\n";
- $text .= $footnote . "\n";
- $text .= "</li>\n\n";
- }
-
- $this->in_footnote = false;
-
- $text .= "</ol>\n";
- $text .= "</div>";
- }
- 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]);
-
- $num = count($this->footnotes_ordered);
- $attr = " rel=\"footnote\"";
- if ($this->fn_link_class != "") {
- $class = $this->fn_link_class;
- $class = $this->encodeAmpsAndAngles($class);
- $class = str_replace('"', '"', $class);
- $attr .= " class=\"$class\"";
- }
- if ($this->fn_link_title != "") {
- $title = $this->fn_link_title;
- $title = $this->encodeAmpsAndAngles($title);
- $title = str_replace('"', '"', $title);
- $attr .= " title=\"$title\"";
- }
- $attr = str_replace("%%", $num, $attr);
-
- return
- "<sup id=\"fnref:$node_id\">".
- "<a href=\"#fn:$node_id\"$attr>$num</a>".
- "</sup>";
- }
-
- return "[^".$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];
- $this->abbr_matches[] = preg_quote($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 <abbr> elements.
- #
- if ($this->abbr_matches) {
- // cannot use the /x modifier because abbr_matches may
- // contain spaces:
- $text = preg_replace_callback('{'.
- '(?<![\w\x1A])'.
- '(?:'. implode('|', $this->abbr_matches) .')'.
- '(?![\w\x1A])'.
- '}',
- array(&$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 $this->hashSpan("<abbr>$abbr</abbr>");
- } else {
- $desc = $this->escapeSpecialCharsWithinTagAttributes($desc);
- return $this->hashSpan("<abbr title=\"$desc\">$abbr</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 <div> and <table> as well).
- For more information about Markdown's syntax, see:
- <http://daringfireball.net/projects/markdown/>
- Bugs
- ----
- To file bug reports please send email to:
- <michel.fortin@michelf.com>
- Please include with your report: (1) the example input; (2) the output you
- expected; (3) the output Markdown actually produced.
- Version History
- ---------------
- See Readme file for details.
- Extra 1.1.4 (3 Aug 2007):
- Extra 1.1.3 (3 Jul 2007):
- Extra 1.1.2 (7 Feb 2007)
- Extra 1.1.1 (28 Dec 2006)
- Extra 1.1 (1 Dec 2006)
- Extra 1.0.1 (9 Dec 2005)
- Extra 1.0 (5 Sep 2005)
- Copyright and License
- ---------------------
- PHP Markdown & Extra
- Copyright (c) 2004-2007 Michel Fortin
- <http://www.michelf.com/>
- All rights reserved.
- Based on Markdown
- Copyright (c) 2003-2006 John Gruber
- <http://daringfireball.net/>
- All rights reserved.
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are
- met:
- * Redistributions of source code must retain the above copyright notice,
- this list of conditions and the following disclaimer.
- * Redistributions in binary form must reproduce the above copyright
- notice, this list of conditions and the following disclaimer in the
- documentation and/or other materials provided with the distribution.
- * Neither the name "Markdown" nor the names of its contributors may
- be used to endorse or promote products derived from this software
- without specific prior written permission.
- This software is provided by the copyright holders and contributors "as
- is" and any express or implied warranties, including, but not limited
- to, the implied warranties of merchantability and fitness for a
- particular purpose are disclaimed. In no event shall the copyright owner
- or contributors be liable for any direct, indirect, incidental, special,
- exemplary, or consequential damages (including, but not limited to,
- procurement of substitute goods or services; loss of use, data, or
- profits; or business interruption) however caused and on any theory of
- liability, whether in contract, strict liability, or tort (including
- negligence or otherwise) arising in any way out of the use of this
- software, even if advised of the possibility of such damage.
- */
- ?>