diff --git a/library/markdown.php b/library/markdown.php
index 8def53fcb..308d91bc7 100644
--- a/library/markdown.php
+++ b/library/markdown.php
@@ -6,14 +6,13 @@
* @brief Parser for Markdown files
*/
-require_once "library/php-markdown/Michelf/MarkdownExtra.inc.php";
use \Michelf\MarkdownExtra;
/**
* @brief This function parses a text using php-markdown library to render Markdown syntax to HTML
*
- * This function is using the php-markdown library by Michel Fortin to parse a
- * string ($text).It returns the rendered HTML code from that text. The optional
+ * This function is using the php-markdown library by Michel Fortin to parse a
+ * string ($text).It returns the rendered HTML code from that text. The optional
* $hardwrap parameter is used to switch between inserting hard breaks after
* every linefeed, which is required for Diaspora compatibility, or not. The
* later is used for parsing documentation and README.md files.
diff --git a/library/php-markdown/License.md b/library/php-markdown/License.md
deleted file mode 100644
index c16197b69..000000000
--- a/library/php-markdown/License.md
+++ /dev/null
@@ -1,36 +0,0 @@
-PHP Markdown Lib
-Copyright (c) 2004-2016 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.
diff --git a/library/php-markdown/Michelf/Markdown.inc.php b/library/php-markdown/Michelf/Markdown.inc.php
deleted file mode 100644
index e2bd3808e..000000000
--- a/library/php-markdown/Michelf/Markdown.inc.php
+++ /dev/null
@@ -1,10 +0,0 @@
-
- * @copyright 2004-2016 Michel Fortin
- * @copyright (Original Markdown) 2004-2006 John Gruber
- */
-
-namespace Michelf;
-
-/**
- * Markdown Parser Class
- */
-class Markdown implements MarkdownInterface {
- /**
- * Define the package version
- * @var string
- */
- const MARKDOWNLIB_VERSION = "1.7.0";
-
- /**
- * Simple function interface - Initialize the parser and return the result
- * of its transform method. This will work fine for derived classes too.
- *
- * @api
- *
- * @param string $text
- * @return string
- */
- public static function defaultTransform($text) {
- // Take parser class on which this function was called.
- $parser_class = \get_called_class();
-
- // Try to take parser from the static parser list
- static $parser_list;
- $parser =& $parser_list[$parser_class];
-
- // Create the parser it not already set
- if (!$parser) {
- $parser = new $parser_class;
- }
-
- // Transform text using parser.
- return $parser->transform($text);
- }
-
- /**
- * Configuration variables
- */
-
- /**
- * Change to ">" for HTML output.
- * @var string
- */
- public $empty_element_suffix = " />";
-
- /**
- * The width of indentation of the output markup
- * @var int
- */
- public $tab_width = 4;
-
- /**
- * Change to `true` to disallow markup or entities.
- * @var boolean
- */
- public $no_markup = false;
- public $no_entities = false;
-
-
- /**
- * Change to `true` to enable line breaks on \n without two trailling spaces
- * @var boolean
- */
- public $hard_wrap = false;
-
- /**
- * Predefined URLs and titles for reference links and images.
- * @var array
- */
- public $predef_urls = array();
- public $predef_titles = array();
-
- /**
- * Optional filter function for URLs
- * @var callable
- */
- public $url_filter_func = null;
-
- /**
- * Optional header id="" generation callback function.
- * @var callable
- */
- public $header_id_func = null;
-
- /**
- * Optional function for converting code block content to HTML
- * @var callable
- */
- public $code_block_content_func = null;
-
- /**
- * Optional function for converting code span content to HTML.
- * @var callable
- */
- public $code_span_content_func = null;
-
- /**
- * Class attribute to toggle "enhanced ordered list" behaviour
- * setting this to true will allow ordered lists to start from the index
- * number that is defined first.
- *
- * For example:
- * 2. List item two
- * 3. List item three
- *
- * Becomes:
- *
- *
List item two
- *
List item three
- *
- *
- * @var bool
- */
- public $enhanced_ordered_list = false;
-
- /**
- * Parser implementation
- */
-
- /**
- * Regex to match balanced [brackets].
- * Needed to insert a maximum bracked depth while converting to PHP.
- * @var int
- */
- protected $nested_brackets_depth = 6;
- protected $nested_brackets_re;
-
- protected $nested_url_parenthesis_depth = 4;
- protected $nested_url_parenthesis_re;
-
- /**
- * Table of hash values for escaped characters:
- * @var string
- */
- protected $escape_chars = '\`*_{}[]()>#+-.!';
- protected $escape_chars_re;
-
- /**
- * Constructor function. Initialize appropriate member variables.
- * @return void
- */
- public function __construct() {
- $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 array
- */
- protected $urls = array();
- protected $titles = array();
- protected $html_hashes = array();
-
- /**
- * Status flag to avoid invalid nesting.
- * @var boolean
- */
- protected $in_anchor = false;
-
- /**
- * Called before the transformation process starts to setup parser states.
- * @return void
- */
- protected function setup() {
- // Clear global hashes.
- $this->urls = $this->predef_urls;
- $this->titles = $this->predef_titles;
- $this->html_hashes = array();
- $this->in_anchor = false;
- }
-
- /**
- * Called after the transformation process to clear any variable which may
- * be taking up memory unnecessarly.
- * @return void
- */
- protected function teardown() {
- $this->urls = array();
- $this->titles = array();
- $this->html_hashes = array();
- }
-
- /**
- * Main function. Performs some preprocessing on the input text and pass
- * it through the document gamut.
- *
- * @api
- *
- * @param string $text
- * @return string
- */
- public function transform($text) {
- $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";
- }
-
- /**
- * Define the document gamut
- * @var array
- */
- protected $document_gamut = array(
- // Strip link definitions, store in hashes.
- "stripLinkDefinitions" => 20,
- "runBasicBlockGamut" => 30,
- );
-
- /**
- * Strips link definitions from text, stores the URLs and titles in
- * hash references
- * @param string $text
- * @return string
- */
- protected function stripLinkDefinitions($text) {
-
- $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;
- }
-
- /**
- * The callback to strip link definitions
- * @param array $matches
- * @return string
- */
- protected function _stripLinkDefinitions_callback($matches) {
- $link_id = strtolower($matches[1]);
- $url = $matches[2] == '' ? $matches[3] : $matches[2];
- $this->urls[$link_id] = $url;
- $this->titles[$link_id] =& $matches[4];
- return ''; // String that will replace the block
- }
-
- /**
- * Hashify HTML blocks
- * @param string $text
- * @return string
- */
- protected function hashHTMLBlocks($text) {
- if ($this->no_markup) {
- return $text;
- }
-
- $less_than_tab = $this->tab_width - 1;
-
- /**
- * Hashify HTML blocks:
- *
- * We only want to do this for block-level HTML tags, such as headers,
- * lists, and tables. That's because we still want to wrap
s around
- * "paragraphs" that are wrapped in non-block-level tags, such as
- * anchors, phrase emphasis, and spans. The list of tags we're looking
- * for is hard-coded:
- *
- * * List "a" is made of tags which can be both inline or block-level.
- * These will be treated block-level when the start tag is alone on
- * its line, otherwise they're not matched here and will be taken as
- * inline later.
- * * List "b" is made of tags which are always block-level;
- */
- $block_tags_a_re = 'ins|del';
- $block_tags_b_re = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|address|'.
- 'script|noscript|style|form|fieldset|iframe|math|svg|'.
- 'article|section|nav|aside|hgroup|header|footer|'.
- 'figure';
-
- // Regular expression for the content of a block tag.
- $nested_tags_level = 4;
- $attr = '
- (?> # optional tag attributes
- \s # starts with whitespace
- (?>
- [^>"/]+ # text outside quotes
- |
- /+(?!>) # slash not followed by ">"
- |
- "[^"]*" # text inside double quotes (tolerate ">")
- |
- \'[^\']*\' # text inside single quotes (tolerate ">")
- )*
- )?
- ';
- $content =
- str_repeat('
- (?>
- [^<]+ # content without tag
- |
- <\2 # nested opening tag
- '.$attr.' # attributes
- (?>
- />
- |
- >', $nested_tags_level). // end of opening tag
- '.*?'. // last level nested tag content
- str_repeat('
- # 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) # Starting on its own line
- | # or
- \A\n? # the at 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;
- }
-
- /**
- * The callback for hashing HTML blocks
- * @param string $matches
- * @return string
- */
- protected function _hashHTMLBlocks_callback($matches) {
- $text = $matches[1];
- $key = $this->hashBlock($text);
- return "\n\n$key\n\n";
- }
-
- /**
- * 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.
- *
- * @param string $text
- * @param string $boundary
- * @return string
- */
- protected function hashPart($text, $boundary = 'X') {
- // 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.
- }
-
- /**
- * Shortcut function for hashPart with block-level boundaries.
- * @param string $text
- * @return string
- */
- protected function hashBlock($text) {
- return $this->hashPart($text, 'B');
- }
-
- /**
- * Define the block gamut - these are all the transformations that form
- * block-level tags like paragraphs, headers, and list items.
- * @var array
- */
- protected $block_gamut = array(
- "doHeaders" => 10,
- "doHorizontalRules" => 20,
- "doLists" => 40,
- "doCodeBlocks" => 50,
- "doBlockQuotes" => 60,
- );
-
- /**
- * 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.
- *
- * @param string $text
- * @return string
- */
- protected function runBlockGamut($text) {
- $text = $this->hashHTMLBlocks($text);
- return $this->runBasicBlockGamut($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.
- *
- * @param string $text
- * @return string
- */
- protected function runBasicBlockGamut($text) {
-
- foreach ($this->block_gamut as $method => $priority) {
- $text = $this->$method($text);
- }
-
- // Finally form paragraph and restore hashed blocks.
- $text = $this->formParagraphs($text);
-
- return $text;
- }
-
- /**
- * Convert horizontal rules
- * @param string $text
- * @return string
- */
- protected function doHorizontalRules($text) {
- 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
- );
- }
-
- /**
- * These are all the transformations that occur *within* block-level
- * tags like paragraphs, headers, and list items.
- * @var array
- */
- protected $span_gamut = array(
- // 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,
- );
-
- /**
- * Run span gamut transformations
- * @param string $text
- * @return string
- */
- protected function runSpanGamut($text) {
- foreach ($this->span_gamut as $method => $priority) {
- $text = $this->$method($text);
- }
-
- return $text;
- }
-
- /**
- * Do hard breaks
- * @param string $text
- * @return string
- */
- protected function doHardBreaks($text) {
- if ($this->hard_wrap) {
- return preg_replace_callback('/ *\n/',
- array($this, '_doHardBreaks_callback'), $text);
- } else {
- return preg_replace_callback('/ {2,}\n/',
- array($this, '_doHardBreaks_callback'), $text);
- }
- }
-
- /**
- * Trigger part hashing for the hard break (callback method)
- * @param array $matches
- * @return string
- */
- protected function _doHardBreaks_callback($matches) {
- return $this->hashPart("empty_element_suffix\n");
- }
-
- /**
- * Turn Markdown link shortcuts into XHTML tags.
- * @param string $text
- * @return string
- */
- protected function doAnchors($text) {
- 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;
- }
-
- /**
- * Callback method to parse referenced anchors
- * @param string $matches
- * @return string
- */
- protected function _doAnchors_reference_callback($matches) {
- $whole_match = $matches[1];
- $link_text = $matches[2];
- $link_id =& $matches[3];
-
- if ($link_id == "") {
- // for shortcut links like [this][] or [this].
- $link_id = $link_text;
- }
-
- // lower-case and turn embedded newlines into spaces
- $link_id = strtolower($link_id);
- $link_id = preg_replace('{[ ]?\n}', ' ', $link_id);
-
- if (isset($this->urls[$link_id])) {
- $url = $this->urls[$link_id];
- $url = $this->encodeURLAttribute($url);
-
- $result = "titles[$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;
- }
-
- /**
- * Callback method to parse inline anchors
- * @param string $matches
- * @return string
- */
- protected function _doAnchors_inline_callback($matches) {
- $whole_match = $matches[1];
- $link_text = $this->runSpanGamut($matches[2]);
- $url = $matches[3] == '' ? $matches[4] : $matches[3];
- $title =& $matches[7];
-
- // If the URL was of the form it got caught by the HTML
- // tag parser and hashed. Need to reverse the process before using
- // the URL.
- $unhashed = $this->unhash($url);
- if ($unhashed != $url)
- $url = preg_replace('/^<(.*)>$/', '\1', $unhashed);
-
- $url = $this->encodeURLAttribute($url);
-
- $result = "encodeAttribute($title);
- $result .= " title=\"$title\"";
- }
-
- $link_text = $this->runSpanGamut($link_text);
- $result .= ">$link_text";
-
- return $this->hashPart($result);
- }
-
- /**
- * Turn Markdown image shortcuts into tags.
- * @param string $text
- * @return string
- */
- protected function doImages($text) {
- // 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: 
- // 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;
- }
-
- /**
- * Callback to parse references image tags
- * @param array $matches
- * @return string
- */
- protected function _doImages_reference_callback($matches) {
- $whole_match = $matches[1];
- $alt_text = $matches[2];
- $link_id = strtolower($matches[3]);
-
- if ($link_id == "") {
- $link_id = strtolower($alt_text); // for shortcut links like ![this][].
- }
-
- $alt_text = $this->encodeAttribute($alt_text);
- if (isset($this->urls[$link_id])) {
- $url = $this->encodeURLAttribute($this->urls[$link_id]);
- $result = "titles[$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;
- }
-
- /**
- * Callback to parse inline image tags
- * @param array $matches
- * @return string
- */
- protected function _doImages_inline_callback($matches) {
- $whole_match = $matches[1];
- $alt_text = $matches[2];
- $url = $matches[3] == '' ? $matches[4] : $matches[3];
- $title =& $matches[7];
-
- $alt_text = $this->encodeAttribute($alt_text);
- $url = $this->encodeURLAttribute($url);
- $result = "encodeAttribute($title);
- $result .= " title=\"$title\""; // $title already quoted
- }
- $result .= $this->empty_element_suffix;
-
- return $this->hashPart($result);
- }
-
- /**
- * Parse Markdown heading elements to HTML
- * @param string $text
- * @return string
- */
- protected function doHeaders($text) {
- /**
- * Setext-style headers:
- * Header 1
- * ========
- *
- * Header 2
- * --------
- */
- $text = preg_replace_callback('{ ^(.+?)[ ]*\n(=+|-+)[ ]*\n+ }mx',
- array($this, '_doHeaders_callback_setext'), $text);
-
- /**
- * atx-style headers:
- * # Header 1
- * ## Header 2
- * ## Header 2 with closing hashes ##
- * ...
- * ###### Header 6
- */
- $text = preg_replace_callback('{
- ^(\#{1,6}) # $1 = string of #\'s
- [ ]*
- (.+?) # $2 = Header text
- [ ]*
- \#* # optional closing #\'s (not counted)
- \n+
- }xm',
- array($this, '_doHeaders_callback_atx'), $text);
-
- return $text;
- }
-
- /**
- * Setext header parsing callback
- * @param array $matches
- * @return string
- */
- protected function _doHeaders_callback_setext($matches) {
- // Terrible hack to check we haven't found an empty list item.
- if ($matches[2] == '-' && preg_match('{^-(?: |$)}', $matches[1])) {
- return $matches[0];
- }
-
- $level = $matches[2]{0} == '=' ? 1 : 2;
-
- // ID attribute generation
- $idAtt = $this->_generateIdFromHeaderValue($matches[1]);
-
- $block = "".$this->runSpanGamut($matches[1])."";
- return "\n" . $this->hashBlock($block) . "\n\n";
- }
-
- /**
- * ATX header parsing callback
- * @param array $matches
- * @return string
- */
- protected function _doHeaders_callback_atx($matches) {
- // ID attribute generation
- $idAtt = $this->_generateIdFromHeaderValue($matches[2]);
-
- $level = strlen($matches[1]);
- $block = "".$this->runSpanGamut($matches[2])."";
- return "\n" . $this->hashBlock($block) . "\n\n";
- }
-
- /**
- * If a header_id_func property is set, we can use it to automatically
- * generate an id attribute.
- *
- * This method returns a string in the form id="foo", or an empty string
- * otherwise.
- * @param string $headerValue
- * @return string
- */
- protected function _generateIdFromHeaderValue($headerValue) {
- if (!is_callable($this->header_id_func)) {
- return "";
- }
-
- $idValue = call_user_func($this->header_id_func, $headerValue);
- if (!$idValue) {
- return "";
- }
-
- return ' id="' . $this->encodeAttribute($idValue) . '"';
- }
-
- /**
- * Form HTML ordered (numbered) and unordered (bulleted) lists.
- * @param string $text
- * @return string
- */
- protected function doLists($text) {
- $less_than_tab = $this->tab_width - 1;
-
- // Re-usable patterns to match list item bullets and number markers:
- $marker_ul_re = '[*+-]';
- $marker_ol_re = '\d+[\.]';
-
- $markers_relist = array(
- $marker_ul_re => $marker_ol_re,
- $marker_ol_re => $marker_ul_re,
- );
-
- foreach ($markers_relist as $marker_re => $other_marker_re) {
- // Re-usable pattern to match any entirel ul or ol list:
- $whole_list_re = '
- ( # $1 = whole list
- ( # $2
- ([ ]{0,'.$less_than_tab.'}) # $3 = number of spaces
- ('.$marker_re.') # $4 = first list item marker
- [ ]+
- )
- (?s:.+?)
- ( # $5
- \z
- |
- \n{2,}
- (?=\S)
- (?! # Negative lookahead for another list item marker
- [ ]*
- '.$marker_re.'[ ]+
- )
- |
- (?= # Lookahead for another kind of list
- \n
- \3 # Must have the same indentation
- '.$other_marker_re.'[ ]+
- )
- )
- )
- '; // mx
-
- // We use a different prefix before nested lists than top-level lists.
- //See extended comment in _ProcessListItems().
-
- if ($this->list_level) {
- $text = preg_replace_callback('{
- ^
- '.$whole_list_re.'
- }mx',
- array($this, '_doLists_callback'), $text);
- } else {
- $text = preg_replace_callback('{
- (?:(?<=\n)\n|\A\n?) # Must eat the newline
- '.$whole_list_re.'
- }mx',
- array($this, '_doLists_callback'), $text);
- }
- }
-
- return $text;
- }
-
- /**
- * List parsing callback
- * @param array $matches
- * @return string
- */
- protected function _doLists_callback($matches) {
- // Re-usable patterns to match list item bullets and number markers:
- $marker_ul_re = '[*+-]';
- $marker_ol_re = '\d+[\.]';
- $marker_any_re = "(?:$marker_ul_re|$marker_ol_re)";
- $marker_ol_start_re = '[0-9]+';
-
- $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);
-
- $ol_start = 1;
- if ($this->enhanced_ordered_list) {
- // Get the start number for ordered list.
- if ($list_type == 'ol') {
- $ol_start_array = array();
- $ol_start_check = preg_match("/$marker_ol_start_re/", $matches[4], $ol_start_array);
- if ($ol_start_check){
- $ol_start = $ol_start_array[0];
- }
- }
- }
-
- if ($ol_start > 1 && $list_type == 'ol'){
- $result = $this->hashBlock("<$list_type start=\"$ol_start\">\n" . $result . "");
- } else {
- $result = $this->hashBlock("<$list_type>\n" . $result . "");
- }
- return "\n". $result ."\n\n";
- }
-
- /**
- * Nesting tracker for list levels
- * @var integer
- */
- protected $list_level = 0;
-
- /**
- * Process the contents of a single ordered or unordered list, splitting it
- * into individual list items.
- * @param string $list_str
- * @param string $marker_any_re
- * @return string
- */
- protected function processListItems($list_str, $marker_any_re) {
- /**
- * 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;
- }
-
- /**
- * List item parsing callback
- * @param array $matches
- * @return string
- */
- protected function _processListItems_callback($matches) {
- $item = $matches[4];
- $leading_line =& $matches[1];
- $leading_space =& $matches[2];
- $marker_space = $matches[3];
- $tailing_blank_line =& $matches[5];
-
- if ($leading_line || $tailing_blank_line ||
- preg_match('/\n{2,}/', $item))
- {
- // Replace marker with the appropriate whitespace indentation
- $item = $leading_space . str_repeat(' ', strlen($marker_space)) . $item;
- $item = $this->runBlockGamut($this->outdent($item)."\n");
- } else {
- // Recursion for sub-lists:
- $item = $this->doLists($this->outdent($item));
- $item = $this->formParagraphs($item, false);
- }
-
- return "
" . $item . "
\n";
- }
-
- /**
- * Process Markdown `
` blocks.
- * @param string $text
- * @return string
- */
- protected function doCodeBlocks($text) {
- $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;
- }
-
- /**
- * Code block parsing callback
- * @param array $matches
- * @return string
- */
- protected function _doCodeBlocks_callback($matches) {
- $codeblock = $matches[1];
-
- $codeblock = $this->outdent($codeblock);
- if ($this->code_block_content_func) {
- $codeblock = call_user_func($this->code_block_content_func, $codeblock, "");
- } else {
- $codeblock = htmlspecialchars($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";
- }
-
- /**
- * Create a code span markup for $code. Called from handleSpanToken.
- * @param string $code
- * @return string
- */
- protected function makeCodeSpan($code) {
- if ($this->code_span_content_func) {
- $code = call_user_func($this->code_span_content_func, $code);
- } else {
- $code = htmlspecialchars(trim($code), ENT_NOQUOTES);
- }
- return $this->hashPart("$code");
- }
-
- /**
- * Define the emphasis operators with their regex matches
- * @var array
- */
- protected $em_relist = array(
- '' => '(?:(? '(? '(? '(?:(? '(? '(? '(?:(? '(? '(?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;
- }
- }
- }
-
- /**
- * Convert Markdown italics (emphasis) and bold (strong) to HTML
- * @param string $text
- * @return string
- */
- protected function doItalicsAndBold($text) {
- $token_stack = array('');
- $text_stack = array('');
- $em = '';
- $strong = '';
- $tree_char_em = false;
-
- while (1) {
- // Get prepared regular expression for seraching emphasis tokens
- // in current context.
- $token_re = $this->em_strong_prepared_relist["$em$strong"];
-
- // Each loop iteration search for the next emphasis token.
- // Each token is then passed to handleSpanToken.
- $parts = preg_split($token_re, $text, 2, PREG_SPLIT_DELIM_CAPTURE);
- $text_stack[0] .= $parts[0];
- $token =& $parts[1];
- $text =& $parts[2];
-
- if (empty($token)) {
- // Reached end of text span: empty stack without emitting.
- // any more emphasis.
- while ($token_stack[0]) {
- $text_stack[1] .= array_shift($token_stack);
- $text_stack[0] .= array_shift($text_stack);
- }
- break;
- }
-
- $token_len = strlen($token);
- if ($tree_char_em) {
- // Reached closing marker while inside a three-char emphasis.
- if ($token_len == 3) {
- // Three-char closing marker, close em and strong.
- array_shift($token_stack);
- $span = array_shift($text_stack);
- $span = $this->runSpanGamut($span);
- $span = "$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];
- }
-
- /**
- * Parse Markdown blockquotes to HTML
- * @param string $text
- * @return string
- */
- protected function doBlockQuotes($text) {
- $text = preg_replace_callback('/
- ( # Wrap whole match in $1
- (?>
- ^[ ]*>[ ]? # ">" at the start of a line
- .+\n # rest of the first line
- (.+\n)* # subsequent consecutive lines
- \n* # blanks
- )+
- )
- /xm',
- array($this, '_doBlockQuotes_callback'), $text);
-
- return $text;
- }
-
- /**
- * Blockquote parsing callback
- * @param array $matches
- * @return string
- */
- protected function _doBlockQuotes_callback($matches) {
- $bq = $matches[1];
- // trim one level of quoting - trim whitespace-only lines
- $bq = preg_replace('/^[ ]*>[ ]?|^[ ]+$/m', '', $bq);
- $bq = $this->runBlockGamut($bq); // recurse
-
- $bq = preg_replace('/^/m', " ", $bq);
- // These leading spaces cause problem with
content,
- // so we need to fix that:
- $bq = preg_replace_callback('{(\s*
) # $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);
- }
-
- /**
- * Encode text for a double-quoted HTML attribute. This function
- * is *not* suitable for attributes enclosed in single quotes.
- * @param string $text
- * @return string
- */
- protected function encodeAttribute($text) {
- $text = $this->encodeAmpsAndAngles($text);
- $text = str_replace('"', '"', $text);
- return $text;
- }
-
- /**
- * Encode text for a double-quoted HTML attribute containing a URL,
- * applying the URL filter if set. Also generates the textual
- * representation for the URL (removing mailto: or tel:) storing it in $text.
- * This function is *not* suitable for attributes enclosed in single quotes.
- *
- * @param string $url
- * @param string &$text Passed by reference
- * @return string URL
- */
- protected function encodeURLAttribute($url, &$text = null) {
- if ($this->url_filter_func) {
- $url = call_user_func($this->url_filter_func, $url);
- }
-
- if (preg_match('{^mailto:}i', $url)) {
- $url = $this->encodeEntityObfuscatedAttribute($url, $text, 7);
- } else if (preg_match('{^tel:}i', $url)) {
- $url = $this->encodeAttribute($url);
- $text = substr($url, 4);
- } else {
- $url = $this->encodeAttribute($url);
- $text = $url;
- }
-
- return $url;
- }
-
- /**
- * 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.
- * @param string $text
- * @return string
- */
- protected function encodeAmpsAndAngles($text) {
- 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;
- }
-
- /**
- * Parse Markdown automatic links to anchor HTML tags
- * @param string $text
- * @return string
- */
- protected function doAutoLinks($text) {
- $text = preg_replace_callback('{<((https?|ftp|dict|tel):[^\'">\s]+)>}i',
- array($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;
- }
-
- /**
- * Parse URL callback
- * @param array $matches
- * @return string
- */
- protected function _doAutoLinks_url_callback($matches) {
- $url = $this->encodeURLAttribute($matches[1], $text);
- $link = "$text";
- return $this->hashPart($link);
- }
-
- /**
- * Parse email address callback
- * @param array $matches
- * @return string
- */
- protected function _doAutoLinks_email_callback($matches) {
- $addr = $matches[1];
- $url = $this->encodeURLAttribute("mailto:$addr", $text);
- $link = "$text";
- return $this->hashPart($link);
- }
-
- /**
- * Input: some text to obfuscate, e.g. "mailto:foo@example.com"
- *
- * Output: the same text but with most characters encoded as either a
- * decimal or hex entity, in the hopes of foiling most address
- * harvesting spam bots. E.g.:
- *
- * mailto:foo
- * @example.co
- * m
- *
- * Note: the additional output $tail is assigned the same value as the
- * ouput, minus the number of characters specified by $head_length.
- *
- * Based by a filter by Matthew Wickline, posted to BBEdit-Talk.
- * With some optimizations by Milian Wolff. Forced encoding of HTML
- * attribute special characters by Allan Odgaard.
- *
- * @param string $text
- * @param string &$tail
- * @param integer $head_length
- * @return string
- */
- protected function encodeEntityObfuscatedAttribute($text, &$tail = null, $head_length = 0) {
- if ($text == "") {
- return $tail = "";
- }
-
- $chars = preg_split('/(? $char) {
- $ord = ord($char);
- // Ignore non-ascii chars.
- if ($ord < 128) {
- $r = ($seed * (1 + $key)) % 100; // Pseudo-random function.
- // roughly 10% raw, 45% hex, 45% dec
- // '@' *must* be encoded. I insist.
- // '"' and '>' have to be encoded inside the attribute
- if ($r > 90 && strpos('@"&>', $char) === false) {
- /* do nothing */
- } else if ($r < 45) {
- $chars[$key] = '&#x'.dechex($ord).';';
- } else {
- $chars[$key] = '&#'.$ord.';';
- }
- }
- }
-
- $text = implode('', $chars);
- $tail = $head_length ? implode('', array_slice($chars, $head_length)) : $text;
-
- return $text;
- }
-
- /**
- * Take the string $str and parse it into tokens, hashing embeded HTML,
- * escaped characters and handling code spans.
- * @param string $str
- * @return string
- */
- protected function parseSpan($str) {
- $output = '';
-
- $span_re = '{
- (
- \\\\'.$this->escape_chars_re.'
- |
- (?no_markup ? '' : '
- |
- # comment
- |
- <\?.*?\?> | <%.*?%> # processing instruction
- |
- <[!$]?[-a-zA-Z0-9:_]+ # regular tags
- (?>
- \s
- (?>[^"\'>]+|"[^"]*"|\'[^\']*\')*
- )?
- >
- |
- <[-a-zA-Z0-9:_]+\s*/> # xml-style empty tag
- |
- # closing tag
- ').'
- )
- }xs';
-
- while (1) {
- // Each loop iteration seach for either the next tag, the next
- // openning code span marker, or the next escaped character.
- // Each token is then passed to handleSpanToken.
- $parts = preg_split($span_re, $str, 2, PREG_SPLIT_DELIM_CAPTURE);
-
- // Create token from text preceding tag.
- if ($parts[0] != "") {
- $output .= $parts[0];
- }
-
- // Check if we reach the end.
- if (isset($parts[1])) {
- $output .= $this->handleSpanToken($parts[1], $parts[2]);
- $str = $parts[2];
- } else {
- break;
- }
- }
-
- return $output;
- }
-
- /**
- * Handle $token provided by parseSpan by determining its nature and
- * returning the corresponding value that should replace it.
- * @param string $token
- * @param string &$str
- * @return string
- */
- protected function handleSpanToken($token, &$str) {
- 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);
- }
- }
-
- /**
- * Remove one level of line-leading tabs or spaces
- * @param string $text
- * @return string
- */
- protected function outdent($text) {
- return preg_replace('/^(\t|[ ]{1,' . $this->tab_width . '})/m', '', $text);
- }
-
-
- /**
- * String length function for detab. `_initDetab` will create a function to
- * handle UTF-8 if the default function does not exist.
- * @var string
- */
- protected $utf8_strlen = 'mb_strlen';
-
- /**
- * Replace tabs with the appropriate amount of spaces.
- *
- * 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.
- *
- * @param string $text
- * @return string
- */
- protected function detab($text) {
- $text = preg_replace_callback('/^.*\t.*$/m',
- array($this, '_detab_callback'), $text);
-
- return $text;
- }
-
- /**
- * Replace tabs callback
- * @param string $matches
- * @return string
- */
- protected function _detab_callback($matches) {
- $line = $matches[0];
- $strlen = $this->utf8_strlen; // strlen function for UTF-8.
-
- // Split in blocks.
- $blocks = explode("\t", $line);
- // Add each blocks to the line.
- $line = $blocks[0];
- unset($blocks[0]); // Do not add first block twice.
- foreach ($blocks as $block) {
- // Calculate amount of space, insert spaces, insert block.
- $amount = $this->tab_width -
- $strlen($line, 'UTF-8') % $this->tab_width;
- $line .= str_repeat(" ", $amount) . $block;
- }
- return $line;
- }
-
- /**
- * Check for the availability of the function in the `utf8_strlen` property
- * (initially `mb_strlen`). If the function is not available, create a
- * function that will loosely count the number of UTF-8 characters with a
- * regular expression.
- * @return void
- */
- protected function _initDetab() {
-
- if (function_exists($this->utf8_strlen)) {
- return;
- }
-
- $this->utf8_strlen = create_function('$text', 'return preg_match_all(
- "/[\\\\x00-\\\\xBF]|[\\\\xC0-\\\\xFF][\\\\x80-\\\\xBF]*/",
- $text, $m);');
- }
-
- /**
- * Swap back in all the tags hashed by _HashHTMLBlocks.
- * @param string $text
- * @return string
- */
- protected function unhash($text) {
- return preg_replace_callback('/(.)\x1A[0-9]+\1/',
- array($this, '_unhash_callback'), $text);
- }
-
- /**
- * Unhashing callback
- * @param array $matches
- * @return string
- */
- protected function _unhash_callback($matches) {
- return $this->html_hashes[$matches[0]];
- }
-}
diff --git a/library/php-markdown/Michelf/MarkdownExtra.inc.php b/library/php-markdown/Michelf/MarkdownExtra.inc.php
deleted file mode 100644
index d09bd7a48..000000000
--- a/library/php-markdown/Michelf/MarkdownExtra.inc.php
+++ /dev/null
@@ -1,11 +0,0 @@
-
- * @copyright 2004-2016 Michel Fortin
- * @copyright (Original Markdown) 2004-2006 John Gruber
- */
-
-namespace Michelf;
-
-/**
- * Markdown Extra Parser Class
- */
-class MarkdownExtra extends \Michelf\Markdown {
- /**
- * Configuration variables
- */
-
- /**
- * Prefix for footnote ids.
- * @var string
- */
- public $fn_id_prefix = "";
-
- /**
- * Optional title attribute for footnote links and backlinks.
- * @var string
- */
- public $fn_link_title = "";
- public $fn_backlink_title = "";
-
- /**
- * Optional class attribute for footnote links and backlinks.
- * @var string
- */
- public $fn_link_class = "footnote-ref";
- public $fn_backlink_class = "footnote-backref";
-
- /**
- * Content to be displayed within footnote backlinks. The default is '↩';
- * the U+FE0E on the end is a Unicode variant selector used to prevent iOS
- * from displaying the arrow character as an emoji.
- * @var string
- */
- public $fn_backlink_html = '↩︎';
-
- /**
- * Class name for table cell alignment (%% replaced left/center/right)
- * For instance: 'go-%%' becomes 'go-left' or 'go-right' or 'go-center'
- * If empty, the align attribute is used instead of a class name.
- * @var string
- */
- public $table_align_class_tmpl = '';
-
- /**
- * Optional class prefix for fenced code block.
- * @var string
- */
- public $code_class_prefix = "";
-
- /**
- * Class attribute for code blocks goes on the `code` tag;
- * setting this to true will put attributes on the `pre` tag instead.
- * @var boolean
- */
- public $code_attr_on_pre = false;
-
- /**
- * Predefined abbreviations.
- * @var array
- */
- public $predef_abbr = array();
-
- /**
- * Parser implementation
- */
-
- /**
- * Constructor function. Initialize the parser object.
- * @return void
- */
- public function __construct() {
- // 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,
- );
-
- $this->enhanced_ordered_list = true;
- parent::__construct();
- }
-
-
- /**
- * Extra variables used during extra transformations.
- * @var array
- */
- protected $footnotes = array();
- protected $footnotes_ordered = array();
- protected $footnotes_ref_count = array();
- protected $footnotes_numbers = array();
- protected $abbr_desciptions = array();
- /** @var string */
- protected $abbr_word_re = '';
-
- /**
- * Give the current footnote number.
- * @var integer
- */
- protected $footnote_counter = 1;
-
- /**
- * Setting up Extra-specific variables.
- */
- protected function setup() {
- parent::setup();
-
- $this->footnotes = array();
- $this->footnotes_ordered = array();
- $this->footnotes_ref_count = array();
- $this->footnotes_numbers = array();
- $this->abbr_desciptions = array();
- $this->abbr_word_re = '';
- $this->footnote_counter = 1;
-
- foreach ($this->predef_abbr as $abbr_word => $abbr_desc) {
- if ($this->abbr_word_re)
- $this->abbr_word_re .= '|';
- $this->abbr_word_re .= preg_quote($abbr_word);
- $this->abbr_desciptions[$abbr_word] = trim($abbr_desc);
- }
- }
-
- /**
- * Clearing Extra-specific variables.
- */
- protected function teardown() {
- $this->footnotes = array();
- $this->footnotes_ordered = array();
- $this->footnotes_ref_count = array();
- $this->footnotes_numbers = array();
- $this->abbr_desciptions = array();
- $this->abbr_word_re = '';
-
- parent::teardown();
- }
-
-
- /**
- * Extra attribute parser
- */
-
- /**
- * Expression to use to catch attributes (includes the braces)
- * @var string
- */
- protected $id_class_attr_catch_re = '\{((?>[ ]*[#.a-z][-_:a-zA-Z0-9=]+){1,})[ ]*\}';
-
- /**
- * Expression to use when parsing in a context when no capture is desired
- * @var string
- */
- protected $id_class_attr_nocatch_re = '\{(?>[ ]*[#.a-z][-_:a-zA-Z0-9=]+){1,}[ ]*\}';
-
- /**
- * Parse attributes caught by the $this->id_class_attr_catch_re expression
- * and return the HTML-formatted list of attributes.
- *
- * Currently supported attributes are .class and #id.
- *
- * In addition, this method also supports supplying a default Id value,
- * which will be used to populate the id attribute in case it was not
- * overridden.
- * @param string $tag_name
- * @param string $attr
- * @param mixed $defaultIdValue
- * @param array $classes
- * @return string
- */
- protected function doExtraAttributes($tag_name, $attr, $defaultIdValue = null, $classes = array()) {
- if (empty($attr) && !$defaultIdValue && empty($classes)) return "";
-
- // Split on components
- preg_match_all('/[#.a-z][-_:a-zA-Z0-9=]+/', $attr, $matches);
- $elements = $matches[0];
-
- // Handle classes and IDs (only first ID taken into account)
- $attributes = array();
- $id = false;
- foreach ($elements as $element) {
- if ($element{0} == '.') {
- $classes[] = substr($element, 1);
- } else if ($element{0} == '#') {
- if ($id === false) $id = substr($element, 1);
- } else if (strpos($element, '=') > 0) {
- $parts = explode('=', $element, 2);
- $attributes[] = $parts[0] . '="' . $parts[1] . '"';
- }
- }
-
- if (!$id) $id = $defaultIdValue;
-
- // Compose attributes as string
- $attr_str = "";
- if (!empty($id)) {
- $attr_str .= ' id="'.$this->encodeAttribute($id) .'"';
- }
- if (!empty($classes)) {
- $attr_str .= ' class="'. implode(" ", $classes) . '"';
- }
- if (!$this->no_markup && !empty($attributes)) {
- $attr_str .= ' '.implode(" ", $attributes);
- }
- return $attr_str;
- }
-
- /**
- * Strips link definitions from text, stores the URLs and titles in
- * hash references.
- * @param string $text
- * @return string
- */
- protected function stripLinkDefinitions($text) {
- $less_than_tab = $this->tab_width - 1;
-
- // Link defs are in the form: ^[id]: url "optional title"
- $text = preg_replace_callback('{
- ^[ ]{0,'.$less_than_tab.'}\[(.+)\][ ]?: # id = $1
- [ ]*
- \n? # maybe *one* newline
- [ ]*
- (?:
- <(.+?)> # url = $2
- |
- (\S+?) # url = $3
- )
- [ ]*
- \n? # maybe one newline
- [ ]*
- (?:
- (?<=\s) # lookbehind for whitespace
- ["(]
- (.*?) # title = $4
- [")]
- [ ]*
- )? # title is optional
- (?:[ ]* '.$this->id_class_attr_catch_re.' )? # $5 = extra id & class attr
- (?:\n+|\Z)
- }xm',
- array($this, '_stripLinkDefinitions_callback'),
- $text);
- return $text;
- }
-
- /**
- * Strip link definition callback
- * @param array $matches
- * @return string
- */
- protected function _stripLinkDefinitions_callback($matches) {
- $link_id = strtolower($matches[1]);
- $url = $matches[2] == '' ? $matches[3] : $matches[2];
- $this->urls[$link_id] = $url;
- $this->titles[$link_id] =& $matches[4];
- $this->ref_attr[$link_id] = $this->doExtraAttributes("", $dummy =& $matches[5]);
- return ''; // String that will replace the block
- }
-
-
- /**
- * HTML block parser
- */
-
- /**
- * Tags that are always treated as block tags
- * @var string
- */
- protected $block_tags_re = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|address|form|fieldset|iframe|hr|legend|article|section|nav|aside|hgroup|header|footer|figcaption|figure';
-
- /**
- * Tags treated as block tags only if the opening tag is alone on its line
- * @var string
- */
- protected $context_block_tags_re = 'script|noscript|style|ins|del|iframe|object|source|track|param|math|svg|canvas|audio|video';
-
- /**
- * Tags where markdown="1" default to span mode:
- * @var string
- */
- protected $contain_span_tags_re = 'p|h[1-6]|li|dd|dt|td|th|legend|address';
-
- /**
- * Tags which must not have their contents modified, no matter where
- * they appear
- * @var string
- */
- protected $clean_tags_re = 'script|style|math|svg';
-
- /**
- * Tags that do not need to be closed.
- * @var string
- */
- protected $auto_close_tags_re = 'hr|img|param|source|track';
-
- /**
- * 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 within a tag, _HashHTMLBlocks_InHTML calls back
- * _HashHTMLBlocks_InMarkdown to handle the Markdown syntax within the tag.
- * These two functions are calling each other. It's recursive!
- * @param string $text
- * @return string
- */
- protected function hashHTMLBlocks($text) {
- if ($this->no_markup) {
- return $text;
- }
-
- // Call the HTML-in-Markdown hasher.
- list($text, ) = $this->_hashHTMLBlocks_inMarkdown($text);
-
- return $text;
- }
-
- /**
- * 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 )
- *
- * @param string $text
- * @param integer $indent
- * @param string $enclosing_tag_re
- * @param boolean $span
- * @return array
- */
- protected function _hashHTMLBlocks_inMarkdown($text, $indent = 0,
- $enclosing_tag_re = '', $span = false)
- {
-
- if ($text === '') return array('', '');
-
- // Regex to check for the presense of newlines around a block tag.
- $newline_before_re = '/(?:^\n?|\n\n)*$/';
- $newline_after_re =
- '{
- ^ # Start of text following the tag.
- (?>[ ]*)? # Optional comment.
- [ ]*\n # Must be followed by newline.
- }xs';
-
- // Regex to match any tag.
- $block_tag_re =
- '{
- ( # $2: Capture whole tag.
- # 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
- ' . ( !$span ? ' # If not in span.
- |
- # Indented code block
- (?: ^[ ]*\n | ^ | \n[ ]*\n )
- [ ]{' . ($indent + 4) . '}[^\n]* \n
- (?>
- (?: [ ]{' . ($indent + 4) . '}[^\n]* | [ ]* ) \n
- )*
- |
- # Fenced code block marker
- (?<= ^ | \n )
- [ ]{0,' . ($indent + 3) . '}(?:~{3,}|`{3,})
- [ ]*
- (?: \.?[-_:a-zA-Z0-9]+ )? # standalone class name
- [ ]*
- (?: ' . $this->id_class_attr_nocatch_re . ' )? # extra attributes
- [ ]*
- (?= \n )
- ' : '' ) . ' # End (if not is span).
- |
- # Code span marker
- # Note, this regex needs to go after backtick fenced
- # code blocks but it should also be kept outside of the
- # "if not in span" condition adding backticks to the parser
- `+
- )
- }xs';
-
-
- $depth = 0; // Current depth inside the tag tree.
- $parsed = ""; // Parsed text that will be returned.
-
- // Loop through every tag until we find the closing tag of the parent
- // or loop until reaching the end of text if no parent tag specified.
- do {
- // Split the text using the first $tag_match pattern found.
- // Text before pattern will be first in the array, text after
- // pattern will be at the end, and between will be any catches made
- // by the pattern.
- $parts = preg_split($block_tag_re, $text, 2,
- PREG_SPLIT_DELIM_CAPTURE);
-
- // If in Markdown span mode, add a empty-string span-level hash
- // after each newline to prevent triggering any block element.
- if ($span) {
- $void = $this->hashPart("", ':');
- $newline = "\n$void";
- $parts[0] = $void . str_replace("\n", $newline, $parts[0]) . $void;
- }
-
- $parsed .= $parts[0]; // Text before current tag.
-
- // If end of $text has been reached. Stop loop.
- if (count($parts) < 3) {
- $text = "";
- break;
- }
-
- $tag = $parts[1]; // Tag to handle.
- $text = $parts[2]; // Remaining text after current tag.
- $tag_re = preg_quote($tag); // For use in a regular expression.
-
- // Check for: Fenced code block marker.
- // Note: need to recheck the whole tag to disambiguate backtick
- // fences from code spans
- if (preg_match('{^\n?([ ]{0,' . ($indent + 3) . '})(~{3,}|`{3,})[ ]*(?:\.?[-_:a-zA-Z0-9]+)?[ ]*(?:' . $this->id_class_attr_nocatch_re . ')?[ ]*\n?$}', $tag, $capture)) {
- // Fenced code block marker: find matching end marker.
- $fence_indent = strlen($capture[1]); // use captured indent in re
- $fence_re = $capture[2]; // use captured fence in re
- if (preg_match('{^(?>.*\n)*?[ ]{' . ($fence_indent) . '}' . $fence_re . '[ ]*(?:\n|$)}', $text,
- $matches))
- {
- // End marker found: pass text unchanged until marker.
- $parsed .= $tag . $matches[0];
- $text = substr($text, strlen($matches[0]));
- }
- else {
- // No end marker: just skip it.
- $parsed .= $tag;
- }
- }
- // Check for: Indented code block.
- else if ($tag{0} == "\n" || $tag{0} == " ") {
- // Indented code block: pass it unchanged, will be handled
- // later.
- $parsed .= $tag;
- }
- // Check for: Code span marker
- // Note: need to check this after backtick fenced code blocks
- else if ($tag{0} == "`") {
- // Find corresponding end marker.
- $tag_re = preg_quote($tag);
- if (preg_match('{^(?>.+?|\n(?!\n))*?(?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);
- }
-
- /**
- * 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 )
- * @param string $text
- * @param string $hash_method
- * @param string $md_attr
- * @return array
- */
- protected function _hashHTMLBlocks_inHTML($text, $hash_method, $md_attr) {
- if ($text === '') return array('', '');
-
- // Regex to match `markdown` attribute inside of a tag.
- $markdown_attr_re = '
- {
- \s* # Eat whitespace before the `markdown` attribute
- markdown
- \s*=\s*
- (?>
- (["\']) # $1: quote delimiter
- (.*?) # $2: attribute value
- \1 # matching delimiter
- |
- ([^\s>]*) # $3: unquoted attribute value
- )
- () # $4: make $3 always defined (avoid warnings)
- }xs';
-
- // Regex to match any tag.
- $tag_re = '{
- ( # $2: Capture whole tag.
-
- ".*?" | # 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 with a new block.
- $block_text = "";
- }
- else $block_text .= $tag;
- }
-
- } while ($depth > 0);
-
- // Hash last block text that wasn't processed inside the loop.
- $parsed .= $this->$hash_method($block_text);
-
- return array($parsed, $text);
- }
-
- /**
- * Called whenever a tag must be hashed when a function inserts a "clean" tag
- * in $text, it passes through this function and is automaticaly escaped,
- * blocking invalid nested overlap.
- * @param string $text
- * @return string
- */
- protected function hashClean($text) {
- return $this->hashPart($text, 'C');
- }
-
- /**
- * Turn Markdown link shortcuts into XHTML tags.
- * @param string $text
- * @return string
- */
- protected function doAnchors($text) {
- if ($this->in_anchor) {
- return $text;
- }
- $this->in_anchor = true;
-
- // First, handle reference-style links: [link text] [id]
- $text = preg_replace_callback('{
- ( # wrap whole match in $1
- \[
- (' . $this->nested_brackets_re . ') # link text = $2
- \]
-
- [ ]? # one optional space
- (?:\n[ ]*)? # one optional newline followed by spaces
-
- \[
- (.*?) # id = $3
- \]
- )
- }xs',
- array($this, '_doAnchors_reference_callback'), $text);
-
- // Next, inline-style links: [link text](url "optional title")
- $text = preg_replace_callback('{
- ( # wrap whole match in $1
- \[
- (' . $this->nested_brackets_re . ') # link text = $2
- \]
- \( # literal paren
- [ \n]*
- (?:
- <(.+?)> # href = $3
- |
- (' . $this->nested_url_parenthesis_re . ') # href = $4
- )
- [ \n]*
- ( # $5
- ([\'"]) # quote char = $6
- (.*?) # Title = $7
- \6 # matching quote
- [ \n]* # ignore any spaces/tabs between closing quote and )
- )? # title is optional
- \)
- (?:[ ]? ' . $this->id_class_attr_catch_re . ' )? # $8 = id/class attributes
- )
- }xs',
- array($this, '_doAnchors_inline_callback'), $text);
-
- // Last, handle reference-style shortcuts: [link text]
- // These must come last in case you've also got [link text][1]
- // or [link text](/foo)
- $text = preg_replace_callback('{
- ( # wrap whole match in $1
- \[
- ([^\[\]]+) # link text = $2; can\'t contain [ or ]
- \]
- )
- }xs',
- array($this, '_doAnchors_reference_callback'), $text);
-
- $this->in_anchor = false;
- return $text;
- }
-
- /**
- * Callback for reference anchors
- * @param array $matches
- * @return string
- */
- protected function _doAnchors_reference_callback($matches) {
- $whole_match = $matches[1];
- $link_text = $matches[2];
- $link_id =& $matches[3];
-
- if ($link_id == "") {
- // for shortcut links like [this][] or [this].
- $link_id = $link_text;
- }
-
- // lower-case and turn embedded newlines into spaces
- $link_id = strtolower($link_id);
- $link_id = preg_replace('{[ ]?\n}', ' ', $link_id);
-
- if (isset($this->urls[$link_id])) {
- $url = $this->urls[$link_id];
- $url = $this->encodeURLAttribute($url);
-
- $result = "titles[$link_id] ) ) {
- $title = $this->titles[$link_id];
- $title = $this->encodeAttribute($title);
- $result .= " title=\"$title\"";
- }
- if (isset($this->ref_attr[$link_id]))
- $result .= $this->ref_attr[$link_id];
-
- $link_text = $this->runSpanGamut($link_text);
- $result .= ">$link_text";
- $result = $this->hashPart($result);
- }
- else {
- $result = $whole_match;
- }
- return $result;
- }
-
- /**
- * Callback for inline anchors
- * @param array $matches
- * @return string
- */
- protected function _doAnchors_inline_callback($matches) {
- $whole_match = $matches[1];
- $link_text = $this->runSpanGamut($matches[2]);
- $url = $matches[3] == '' ? $matches[4] : $matches[3];
- $title =& $matches[7];
- $attr = $this->doExtraAttributes("a", $dummy =& $matches[8]);
-
- // if the URL was of the form it got caught by the HTML
- // tag parser and hashed. Need to reverse the process before using the URL.
- $unhashed = $this->unhash($url);
- if ($unhashed != $url)
- $url = preg_replace('/^<(.*)>$/', '\1', $unhashed);
-
- $url = $this->encodeURLAttribute($url);
-
- $result = "encodeAttribute($title);
- $result .= " title=\"$title\"";
- }
- $result .= $attr;
-
- $link_text = $this->runSpanGamut($link_text);
- $result .= ">$link_text";
-
- return $this->hashPart($result);
- }
-
- /**
- * Turn Markdown image shortcuts into tags.
- * @param string $text
- * @return string
- */
- protected function doImages($text) {
- // 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: 
- // Don't forget: encode * and _
- $text = preg_replace_callback('{
- ( # wrap whole match in $1
- !\[
- (' . $this->nested_brackets_re . ') # alt text = $2
- \]
- \s? # One optional whitespace character
- \( # literal paren
- [ \n]*
- (?:
- <(\S*)> # src url = $3
- |
- (' . $this->nested_url_parenthesis_re . ') # src url = $4
- )
- [ \n]*
- ( # $5
- ([\'"]) # quote char = $6
- (.*?) # title = $7
- \6 # matching quote
- [ \n]*
- )? # title is optional
- \)
- (?:[ ]? ' . $this->id_class_attr_catch_re . ' )? # $8 = id/class attributes
- )
- }xs',
- array($this, '_doImages_inline_callback'), $text);
-
- return $text;
- }
-
- /**
- * Callback for referenced images
- * @param array $matches
- * @return string
- */
- protected function _doImages_reference_callback($matches) {
- $whole_match = $matches[1];
- $alt_text = $matches[2];
- $link_id = strtolower($matches[3]);
-
- if ($link_id == "") {
- $link_id = strtolower($alt_text); // for shortcut links like ![this][].
- }
-
- $alt_text = $this->encodeAttribute($alt_text);
- if (isset($this->urls[$link_id])) {
- $url = $this->encodeURLAttribute($this->urls[$link_id]);
- $result = "titles[$link_id])) {
- $title = $this->titles[$link_id];
- $title = $this->encodeAttribute($title);
- $result .= " title=\"$title\"";
- }
- if (isset($this->ref_attr[$link_id]))
- $result .= $this->ref_attr[$link_id];
- $result .= $this->empty_element_suffix;
- $result = $this->hashPart($result);
- }
- else {
- // If there's no such link ID, leave intact:
- $result = $whole_match;
- }
-
- return $result;
- }
-
- /**
- * Callback for inline images
- * @param array $matches
- * @return string
- */
- protected function _doImages_inline_callback($matches) {
- $whole_match = $matches[1];
- $alt_text = $matches[2];
- $url = $matches[3] == '' ? $matches[4] : $matches[3];
- $title =& $matches[7];
- $attr = $this->doExtraAttributes("img", $dummy =& $matches[8]);
-
- $alt_text = $this->encodeAttribute($alt_text);
- $url = $this->encodeURLAttribute($url);
- $result = "encodeAttribute($title);
- $result .= " title=\"$title\""; // $title already quoted
- }
- $result .= $attr;
- $result .= $this->empty_element_suffix;
-
- return $this->hashPart($result);
- }
-
- /**
- * Process markdown headers. Redefined to add ID and class attribute support.
- * @param string $text
- * @return string
- */
- protected function doHeaders($text) {
- // Setext-style headers:
- // Header 1 {#header1}
- // ========
- //
- // Header 2 {#header2 .class1 .class2}
- // --------
- //
- $text = preg_replace_callback(
- '{
- (^.+?) # $1: Header text
- (?:[ ]+ ' . $this->id_class_attr_catch_re . ' )? # $3 = id/class attributes
- [ ]*\n(=+|-+)[ ]*\n+ # $3: Header footer
- }mx',
- array($this, '_doHeaders_callback_setext'), $text);
-
- // atx-style headers:
- // # Header 1 {#header1}
- // ## Header 2 {#header2}
- // ## Header 2 with closing hashes ## {#header3.class1.class2}
- // ...
- // ###### Header 6 {.class2}
- //
- $text = preg_replace_callback('{
- ^(\#{1,6}) # $1 = string of #\'s
- [ ]*
- (.+?) # $2 = Header text
- [ ]*
- \#* # optional closing #\'s (not counted)
- (?:[ ]+ ' . $this->id_class_attr_catch_re . ' )? # $3 = id/class attributes
- [ ]*
- \n+
- }xm',
- array($this, '_doHeaders_callback_atx'), $text);
-
- return $text;
- }
-
- /**
- * Callback for setext headers
- * @param array $matches
- * @return string
- */
- protected function _doHeaders_callback_setext($matches) {
- if ($matches[3] == '-' && preg_match('{^- }', $matches[1])) {
- return $matches[0];
- }
-
- $level = $matches[3]{0} == '=' ? 1 : 2;
-
- $defaultId = is_callable($this->header_id_func) ? call_user_func($this->header_id_func, $matches[1]) : null;
-
- $attr = $this->doExtraAttributes("h$level", $dummy =& $matches[2], $defaultId);
- $block = "" . $this->runSpanGamut($matches[1]) . "";
- return "\n" . $this->hashBlock($block) . "\n\n";
- }
-
- /**
- * Callback for atx headers
- * @param array $matches
- * @return string
- */
- protected function _doHeaders_callback_atx($matches) {
- $level = strlen($matches[1]);
-
- $defaultId = is_callable($this->header_id_func) ? call_user_func($this->header_id_func, $matches[2]) : null;
- $attr = $this->doExtraAttributes("h$level", $dummy =& $matches[3], $defaultId);
- $block = "" . $this->runSpanGamut($matches[2]) . "";
- return "\n" . $this->hashBlock($block) . "\n\n";
- }
-
- /**
- * Form HTML tables.
- * @param string $text
- * @return string
- */
- protected function doTables($text) {
- $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;
- }
-
- /**
- * Callback for removing the leading pipe for each row
- * @param array $matches
- * @return string
- */
- protected function _doTable_leadingPipe_callback($matches) {
- $head = $matches[1];
- $underline = $matches[2];
- $content = $matches[3];
-
- $content = preg_replace('/^ *[|]/m', '', $content);
-
- return $this->_doTable_callback(array($matches[0], $head, $underline, $content));
- }
-
- /**
- * Make the align attribute in a table
- * @param string $alignname
- * @return string
- */
- protected function _doTable_makeAlignAttr($alignname)
- {
- if (empty($this->table_align_class_tmpl)) {
- return " align=\"$alignname\"";
- }
-
- $classname = str_replace('%%', $alignname, $this->table_align_class_tmpl);
- return " class=\"$classname\"";
- }
-
- /**
- * Calback for processing tables
- * @param array $matches
- * @return string
- */
- protected function _doTable_callback($matches) {
- $head = $matches[1];
- $underline = $matches[2];
- $content = $matches[3];
-
- // Remove any tailing pipes for each line.
- $head = preg_replace('/[|] *$/m', '', $head);
- $underline = preg_replace('/[|] *$/m', '', $underline);
- $content = preg_replace('/[|] *$/m', '', $content);
-
- // Reading alignement from header underline.
- $separators = preg_split('/ *[|] */', $underline);
- foreach ($separators as $n => $s) {
- if (preg_match('/^ *-+: *$/', $s))
- $attr[$n] = $this->_doTable_makeAlignAttr('right');
- else if (preg_match('/^ *:-+: *$/', $s))
- $attr[$n] = $this->_doTable_makeAlignAttr('center');
- else if (preg_match('/^ *:-+ *$/', $s))
- $attr[$n] = $this->_doTable_makeAlignAttr('left');
- else
- $attr[$n] = '';
- }
-
- // Parsing span elements, including code spans, character escapes,
- // and inline HTML tags, so that pipes inside those gets ignored.
- $head = $this->parseSpan($head);
- $headers = preg_split('/ *[|] */', $head);
- $col_count = count($headers);
- $attr = array_pad($attr, $col_count, '');
-
- // Write column headers.
- $text = "
tags and unhashify HTML blocks
- foreach ($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 = $wrap_in_p && !preg_match('/^B\x1A[0-9]+B|^C\x1A[0-9]+C$/', $value);
-
- if ($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 - Strips link definitions from text, stores the URLs and
- * titles in hash references.
- * @param string $text
- * @return string
- */
- protected function stripFootnotes($text) {
- $less_than_tab = $this->tab_width - 1;
-
- // Link defs are in the form: [^id]: url "optional title"
- $text = preg_replace_callback('{
- ^[ ]{0,' . $less_than_tab . '}\[\^(.+?)\][ ]?: # note_id = $1
- [ ]*
- \n? # maybe *one* newline
- ( # text = $2 (no blank lines allowed)
- (?:
- .+ # actual text
- |
- \n # newlines but
- (?!\[.+?\][ ]?:\s)# negative lookahead for footnote or link definition marker.
- (?!\n+[ ]{0,3}\S)# ensure line is not blank and followed
- # by non-indented content
- )*
- )
- }xm',
- array($this, '_stripFootnotes_callback'),
- $text);
- return $text;
- }
-
- /**
- * Callback for stripping footnotes
- * @param array $matches
- * @return string
- */
- protected function _stripFootnotes_callback($matches) {
- $note_id = $this->fn_id_prefix . $matches[1];
- $this->footnotes[$note_id] = $this->outdent($matches[2]);
- return ''; // String that will replace the block
- }
-
- /**
- * Replace footnote references in $text [^id] with a special text-token
- * which will be replaced by the actual footnote marker in appendFootnotes.
- * @param string $text
- * @return string
- */
- protected function doFootnotes($text) {
- if (!$this->in_anchor) {
- $text = preg_replace('{\[\^(.+?)\]}', "F\x1Afn:\\1\x1A:", $text);
- }
- return $text;
- }
-
- /**
- * Append footnote list to text
- * @param string $text
- * @return string
- */
- protected function appendFootnotes($text) {
- $text = preg_replace_callback('{F\x1Afn:(.*?)\x1A:}',
- array($this, '_appendFootnotes_callback'), $text);
-
- if (!empty($this->footnotes_ordered)) {
- $text .= "\n\n";
- $text .= "
";
- }
- return $text;
- }
-
- /**
- * Callback for appending footnotes
- * @param array $matches
- * @return string
- */
- protected function _appendFootnotes_callback($matches) {
- $node_id = $this->fn_id_prefix . $matches[1];
-
- // Create footnote marker only if it has a corresponding footnote *and*
- // the footnote hasn't been used by another marker.
- if (isset($this->footnotes[$node_id])) {
- $num =& $this->footnotes_numbers[$node_id];
- if (!isset($num)) {
- // Transfer footnote content to the ordered list and give it its
- // number
- $this->footnotes_ordered[$node_id] = $this->footnotes[$node_id];
- $this->footnotes_ref_count[$node_id] = 1;
- $num = $this->footnote_counter++;
- $ref_count_mark = '';
- } else {
- $ref_count_mark = $this->footnotes_ref_count[$node_id] += 1;
- }
-
- $attr = "";
- if ($this->fn_link_class != "") {
- $class = $this->fn_link_class;
- $class = $this->encodeAttribute($class);
- $attr .= " class=\"$class\"";
- }
- if ($this->fn_link_title != "") {
- $title = $this->fn_link_title;
- $title = $this->encodeAttribute($title);
- $attr .= " title=\"$title\"";
- }
-
- $attr = str_replace("%%", $num, $attr);
- $node_id = $this->encodeAttribute($node_id);
-
- return
- "".
- "$num".
- "";
- }
-
- return "[^" . $matches[1] . "]";
- }
-
-
- /**
- * Abbreviations - strips abbreviations from text, stores titles in hash
- * references.
- * @param string $text
- * @return string
- */
- protected function stripAbbreviations($text) {
- $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;
- }
-
- /**
- * Callback for stripping abbreviations
- * @param array $matches
- * @return string
- */
- protected function _stripAbbreviations_callback($matches) {
- $abbr_word = $matches[1];
- $abbr_desc = $matches[2];
- if ($this->abbr_word_re) {
- $this->abbr_word_re .= '|';
- }
- $this->abbr_word_re .= preg_quote($abbr_word);
- $this->abbr_desciptions[$abbr_word] = trim($abbr_desc);
- return ''; // String that will replace the block
- }
-
- /**
- * Find defined abbreviations in text and wrap them in elements.
- * @param string $text
- * @return string
- */
- protected function doAbbreviations($text) {
- 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;
- }
-
- /**
- * Callback for processing abbreviations
- * @param array $matches
- * @return string
- */
- protected function _doAbbreviations_callback($matches) {
- $abbr = $matches[0];
- if (isset($this->abbr_desciptions[$abbr])) {
- $desc = $this->abbr_desciptions[$abbr];
- if (empty($desc)) {
- return $this->hashPart("$abbr");
- } else {
- $desc = $this->encodeAttribute($desc);
- return $this->hashPart("$abbr");
- }
- } else {
- return $matches[0];
- }
- }
-}
diff --git a/library/php-markdown/Michelf/MarkdownInterface.inc.php b/library/php-markdown/Michelf/MarkdownInterface.inc.php
deleted file mode 100644
index c4e9ac7f6..000000000
--- a/library/php-markdown/Michelf/MarkdownInterface.inc.php
+++ /dev/null
@@ -1,9 +0,0 @@
-
- * @copyright 2004-2016 Michel Fortin
- * @copyright (Original Markdown) 2004-2006 John Gruber
- */
-
-namespace Michelf;
-
-/**
- * Markdown Parser Interface
- */
-interface MarkdownInterface {
- /**
- * Initialize the parser and return the result of its transform method.
- * This will work fine for derived classes too.
- *
- * @api
- *
- * @param string $text
- * @return string
- */
- public static function defaultTransform($text);
-
- /**
- * Main function. Performs some preprocessing on the input text
- * and pass it through the document gamut.
- *
- * @api
- *
- * @param string $text
- * @return string
- */
- public function transform($text);
-}
diff --git a/library/php-markdown/Readme.md b/library/php-markdown/Readme.md
deleted file mode 100644
index 63e8c1ece..000000000
--- a/library/php-markdown/Readme.md
+++ /dev/null
@@ -1,384 +0,0 @@
-PHP Markdown
-============
-
-PHP Markdown Lib 1.7.0 - 29 Oct 2016
-
-by Michel Fortin
-
-
-based on Markdown by John Gruber
-
-
-
-Introduction
-------------
-
-This is a library package that includes the PHP Markdown parser and its
-sibling PHP Markdown Extra with additional features.
-
-Markdown is a text-to-HTML conversion tool for web writers. Markdown
-allows you to write using an easy-to-read, easy-to-write plain text
-format, then convert it to structurally valid XHTML (or HTML).
-
-"Markdown" is actually two things: a plain text markup syntax, and a
-software tool, originally written in Perl, that converts the plain text
-markup to HTML. PHP Markdown is a port to PHP of the original Markdown
-program by John Gruber.
-
-* [Full documentation of the Markdown syntax]()
- — Daring Fireball (John Gruber)
-* [Markdown Extra syntax additions]()
- — Michel Fortin
-
-
-Requirement
------------
-
-This library package requires PHP 5.3 or later.
-
-Note: The older plugin/library hybrid package for PHP Markdown and
-PHP Markdown Extra is still maintained and will work with PHP 4.0.5 and later.
-
-Before PHP 5.3.7, pcre.backtrack_limit defaults to 100 000, which is too small
-in many situations. You might need to set it to higher values. Later PHP
-releases defaults to 1 000 000, which is usually fine.
-
-
-Usage
------
-
-This library package is meant to be used with class autoloading. For autoloading
-to work, your project needs have setup a PSR-0-compatible autoloader. See the
-included Readme.php file for a minimal autoloader setup. (If you cannot use
-autoloading, see below.)
-
-With class autoloading in place, putting the 'Michelf' folder in your
-include path should be enough for this to work:
-
- use \Michelf\Markdown;
- $my_html = Markdown::defaultTransform($my_text);
-
-Markdown Extra syntax is also available the same way:
-
- use \Michelf\MarkdownExtra;
- $my_html = MarkdownExtra::defaultTransform($my_text);
-
-If you wish to use PHP Markdown with another text filter function
-built to parse HTML, you should filter the text *after* the `transform`
-function call. This is an example with [PHP SmartyPants][psp]:
-
- use \Michelf\Markdown, \Michelf\SmartyPants;
- $my_html = Markdown::defaultTransform($my_text);
- $my_html = SmartyPants::defaultTransform($my_html);
-
-All these examples are using the static `defaultTransform` static function
-found inside the parser class. If you want to customize the parser
-configuration, you can also instantiate it directly and change some
-configuration variables:
-
- use \Michelf\MarkdownExtra;
- $parser = new MarkdownExtra;
- $parser->fn_id_prefix = "post22-";
- $my_html = $parser->transform($my_text);
-
-To learn more, see the full list of [configuration variables].
-
- [configuration variables]: https://michelf.ca/projects/php-markdown/configuration/
-
-
-### Usage without an autoloader
-
-If you cannot use class autoloading, you can still use `include` or `require`
-to access the parser. To load the `\Michelf\Markdown` parser, do it this way:
-
- require_once 'Michelf/Markdown.inc.php';
-
-Or, if you need the `\Michelf\MarkdownExtra` parser:
-
- require_once 'Michelf/MarkdownExtra.inc.php';
-
-While the plain `.php` files depend on autoloading to work correctly, using the
-`.inc.php` files instead will eagerly load the dependencies that would be
-loaded on demand if you were using autoloading.
-
-
-Public API and Versioning Policy
----------------------------------
-
-Version numbers are of the form *major*.*minor*.*patch*.
-
-The public API of PHP Markdown consist of the two parser classes `Markdown`
-and `MarkdownExtra`, their constructors, the `transform` and `defaultTransform`
-functions and their configuration variables. The public API is stable for
-a given major version number. It might get additions when the minor version
-number increments.
-
-**Protected members are not considered public API.** This is unconventional
-and deserves an explanation. Incrementing the major version number every time
-the underlying implementation of something changes is going to give
-nonessential version numbers for the vast majority of people who just use the
-parser. Protected members are meant to create parser subclasses that behave in
-different ways. Very few people create parser subclasses. I don't want to
-discourage it by making everything private, but at the same time I can't
-guarantee any stable hook between versions if you use protected members.
-
-**Syntax changes** will increment the minor number for new features, and the
-patch number for small corrections. A *new feature* is something that needs a
-change in the syntax documentation. Note that since PHP Markdown Lib includes
-two parsers, a syntax change for either of them will increment the minor
-number. Also note that there is nothing perfectly backward-compatible with the
-Markdown syntax: all inputs are always valid, so new features always replace
-something that was previously legal, although generally nonsensical to do.
-
-
-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 PHP Markdown actually produced.
-
-If you have a problem where Markdown gives you an empty result, first check
-that the backtrack limit is not too low by running `php --info | grep pcre`.
-See Installation and Requirement above for details.
-
-
-Development and Testing
------------------------
-
-Pull requests for fixing bugs are welcome. Proposed new features are
-going to be meticulously reviewed -- taking into account backward compatibility,
-potential side effects, and future extensibility -- before deciding on
-acceptance or rejection.
-
-If you make a pull request that includes changes to the parser please add
-tests for what is being changed to [MDTest][] and make a pull request there
-too.
-
- [MDTest]: https://github.com/michelf/mdtest/
-
-
-Donations
----------
-
-If you wish to make a donation that will help me devote more time to
-PHP Markdown, please visit [michelf.ca/donate] or send Bitcoin to
-[1HiuX34czvVPPdhXbUAsAu7pZcesniDCGH].
-
- [michelf.ca/donate]: https://michelf.ca/donate/#!Thanks%20for%20PHP%20Markdown
- [1HiuX34czvVPPdhXbUAsAu7pZcesniDCGH]: bitcoin:1HiuX34czvVPPdhXbUAsAu7pZcesniDCGH
-
-
-Version History
----------------
-
-PHP Markdown Lib 1.7.0 (29 Oct 2016)
-
-* Added a `hard_wrap` configuration variable to make all newline characters
- in the text become ` ` tags in the HTML output. By default, according
- to the standard Markdown syntax these newlines are ignored unless they a
- preceded by two spaces. Thanks to Jonathan Cohlmeyer for the implementation.
-
-* Improved the parsing of list items to fix problematic cases that came to
- light with the addition of `hard_wrap`. This should have no effect on the
- output except span-level list items that ended with two spaces (and thus
- ended with a line break).
-
-* Added a `code_span_content_func` configuration variable which takes a
- function that will convert the content of the code span to HTML. This can
- be useful to implement syntax highlighting. Although contrary to its
- code block equivalent, there is no syntax for specifying a language.
- Credits to styxit for the implementation.
-
-* Fixed a Markdown Extra issue where two-space-at-end-of-line hard breaks
- wouldn't work inside of HTML block elements such as `
`
- where the element expects only span-level content.
-
-* In the parser code, switched to PHPDoc comment format. Thanks to
- Robbie Averill for the help.
-
-
-PHP Markdown Lib 1.6.0 (23 Dec 2015)
-
-Note: this version was incorrectly released as 1.5.1 on Dec 22, a number
-that contradicted the versioning policy.
-
-* For fenced code blocks in Markdown Extra, can now set a class name for the
- code block's language before the special attribute block. Previously, this
- class name was only allowed in the absence of the special attribute block.
-
-* Added a `code_block_content_func` configuration variable which takes a
- function that will convert the content of the code block to HTML. This is
- most useful for syntax highlighting. For fenced code blocks in Markdown
- Extra, the function has access to the language class name (the one outside
- of the special attribute block). Credits to Mario Konrad for providing the
- implementation.
-
-* The curled arrow character for the backlink in footnotes is now followed
- by a Unicode variant selector to prevent it from being displayed in emoji
- form on iOS.
-
- Note that in older browsers the variant selector is often interpreted as a
- separate character, making it visible after the arrow. So there is now a
- also a `fn_backlink_html` configuration variable that can be used to set
- the link text to something else. Credits to Dana for providing the
- implementation.
-
-* Fixed an issue in MarkdownExtra where long header lines followed by a
- special attribute block would hit the backtrack limit an cause an empty
- string to be returned.
-
-
-PHP Markdown Lib 1.5.0 (1 Mar 2015)
-
-* Added the ability start ordered lists with a number different from 1 and
- and have that reflected in the HTML output. This can be enabled with
- the `enhanced_ordered_lists` configuration variable for the Markdown
- parser; it is enabled by default for Markdown Extra.
- Credits to Matt Gorle for providing the implementation.
-
-* Added the ability to insert custom HTML attributes with simple values
- everywhere an extra attribute block is allowed (links, images, headers).
- The value must be unquoted, cannot contains spaces and is limited to
- alphanumeric ASCII characters.
- Credits to Peter Droogmans for providing the implementation.
-
-* Added a `header_id_func` configuration variable which takes a function
- that can generate an `id` attribute value from the header text.
- Credits to Evert Pot for providing the implementation.
-
-* Added a `url_filter_func` configuration variable which takes a function
- that can rewrite any link or image URL to something different.
-
-
-PHP Markdown Lib 1.4.1 (4 May 2014)
-
-* The HTML block parser will now treat `` as a block-level element
- (as it should) and no longer wrap it in `
` or parse it's content with
- the as Markdown syntax (although with Extra you can use `markdown="1"`
- if you wish to use the Markdown syntax inside it).
-
-* The content of `
![\"$alt_text\"";](\"$url\")
titles[$link_id])) {
- $title = $this->titles[$link_id];
- $title = $this->encodeAttribute($title);
- $result .= " title=\"$title\"";
- }
- if (isset($this->ref_attr[$link_id]))
- $result .= $this->ref_attr[$link_id];
- $result .= $this->empty_element_suffix;
- $result = $this->hashPart($result);
- }
- else {
- // If there's no such link ID, leave intact:
- $result = $whole_match;
- }
-
- return $result;
- }
-
- /**
- * Callback for inline images
- * @param array $matches
- * @return string
- */
- protected function _doImages_inline_callback($matches) {
- $whole_match = $matches[1];
- $alt_text = $matches[2];
- $url = $matches[3] == '' ? $matches[4] : $matches[3];
- $title =& $matches[7];
- $attr = $this->doExtraAttributes("img", $dummy =& $matches[8]);
-
- $alt_text = $this->encodeAttribute($alt_text);
- $url = $this->encodeURLAttribute($url);
- $result = "