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Upgraded PHP Markdown library to version 1.7.0

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This commit is contained in:
Hypolite Petovan 2017-03-23 21:19:24 -04:00
commit c9214c2051
10 changed files with 2798 additions and 2238 deletions
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6
library/php-markdown/License.md
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@ -1,11 +1,11 @@
PHP Markdown Lib
Copyright (c) 2004-2014 Michel Fortin
<http://michelf.ca/>
Copyright (c) 2004-2016 Michel Fortin
<https://michelf.ca/>
All rights reserved.
Based on Markdown
Copyright (c) 2003-2006 John Gruber
<http://daringfireball.net/>
<https://daringfireball.net/>
All rights reserved.
Redistribution and use in source and binary forms, with or without

10
library/php-markdown/Michelf/Markdown.inc.php
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@ -1,10 +1,10 @@
<?php
# Use this file if you cannot use class autoloading. It will include all the
# files needed for the Markdown parser.
#
# Take a look at the PSR-0-compatible class autoloading implementation
# in the Readme.php file if you want a simple autoloader setup.
// Use this file if you cannot use class autoloading. It will include all the
// files needed for the Markdown parser.
//
// Take a look at the PSR-0-compatible class autoloading implementation
// in the Readme.php file if you want a simple autoloader setup.
require_once dirname(__FILE__) . '/MarkdownInterface.php';
require_once dirname(__FILE__) . '/Markdown.php';

3009
library/php-markdown/Michelf/Markdown.php
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@ -1,147 +1,227 @@
<?php
#
# Markdown - A text-to-HTML conversion tool for web writers
#
# PHP Markdown
# Copyright (c) 2004-2014 Michel Fortin
# <http://michelf.com/projects/php-markdown/>
#
# Original Markdown
# Copyright (c) 2004-2006 John Gruber
# <http://daringfireball.net/projects/markdown/>
#
/**
* Markdown - A text-to-HTML conversion tool for web writers
*
* @package php-markdown
* @author Michel Fortin <michel.fortin@michelf.com>
* @copyright 2004-2016 Michel Fortin <https://michelf.com/projects/php-markdown/>
* @copyright (Original Markdown) 2004-2006 John Gruber <https://daringfireball.net/projects/markdown/>
*/
namespace Michelf;
#
# Markdown Parser Class
#
/**
* Markdown Parser Class
*/
class Markdown implements MarkdownInterface {
/**
* Define the package version
* @var string
*/
const MARKDOWNLIB_VERSION = "1.7.0";
### Version ###
const MARKDOWNLIB_VERSION = "1.4.1";
### Simple Function Interface ###
/**
* 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) {
#
# Initialize the parser and return the result of its transform method.
# This will work fine for derived classes too.
#
# Take parser class on which this function was called.
// Take parser class on which this function was called.
$parser_class = \get_called_class();
# try to take parser from the static parser list
// 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 (!$parser)
// Create the parser it not already set
if (!$parser) {
$parser = new $parser_class;
}
# Transform text using parser.
// Transform text using parser.
return $parser->transform($text);
}
### Configuration Variables ###
/**
* Configuration variables
*/
# Change to ">" for HTML output.
/**
* 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.
public $no_markup = false;
/**
* Change to `true` to disallow markup or entities.
* @var boolean
*/
public $no_markup = false;
public $no_entities = false;
# Predefined urls and titles for reference links and images.
public $predef_urls = array();
/**
* 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
/**
* 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;
### Parser Implementation ###
/**
* Optional function for converting code block content to HTML
* @var callable
*/
public $code_block_content_func = null;
# Regex to match balanced [brackets].
# Needed to insert a maximum bracked depth while converting to PHP.
/**
* 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:
* <ol start="2">
* <li>List item two</li>
* <li>List item three</li>
* </ol>
*
* @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:
/**
* 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() {
#
# Constructor function. Initialize appropriate member variables.
#
$this->_initDetab();
$this->prepareItalicsAndBold();
$this->nested_brackets_re =
$this->nested_brackets_re =
str_repeat('(?>[^\[\]]+|\[', $this->nested_brackets_depth).
str_repeat('\])*', $this->nested_brackets_depth);
$this->nested_url_parenthesis_re =
$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.
// Sort document, block, and span gamut in ascendent priority order.
asort($this->document_gamut);
asort($this->block_gamut);
asort($this->span_gamut);
}
# Internal hashes used during transformation.
protected $urls = array();
protected $titles = array();
/**
* Internal hashes used during transformation.
* @var array
*/
protected $urls = array();
protected $titles = array();
protected $html_hashes = array();
# Status flag to avoid invalid nesting.
/**
* 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() {
#
# Called before the transformation process starts to setup parser
# states.
#
# Clear global hashes.
$this->urls = $this->predef_urls;
$this->titles = $this->predef_titles;
// Clear global hashes.
$this->urls = $this->predef_urls;
$this->titles = $this->predef_titles;
$this->html_hashes = array();
$this->in_anchor = false;
$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() {
#
# Called after the transformation process to clear any variable
# which may be taking up memory unnecessarly.
#
$this->urls = array();
$this->titles = array();
$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) {
#
# Main function. Performs some preprocessing on the input text
# and pass it through the document gamut.
#
$this->setup();
# Remove UTF-8 BOM and marker character in input, if present.
$text = preg_replace('{^\xEF\xBB\xBF|\x1A}', '', $text);
@ -168,28 +248,33 @@ class Markdown implements MarkdownInterface {
foreach ($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.
// 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) {
#
# Strips link definitions from text, stores the URLs and titles in
# hash references.
#
$less_than_tab = $this->tab_width - 1;
# Link defs are in the form: ^[id]: url "optional title"
// Link defs are in the form: ^[id]: url "optional title"
$text = preg_replace_callback('{
^[ ]{0,'.$less_than_tab.'}\[(.+)\][ ]?: # id = $1
[ ]*
@ -213,43 +298,58 @@ class Markdown implements MarkdownInterface {
(?:\n+|\Z)
}xm',
array($this, '_stripLinkDefinitions_callback'),
$text);
$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
return ''; // String that will replace the block
}
/**
* Hashify HTML blocks
* @param string $text
* @return string
*/
protected function hashHTMLBlocks($text) {
if ($this->no_markup) return $text;
if ($this->no_markup) {
return $text;
}
$less_than_tab = $this->tab_width - 1;
# Hashify HTML blocks:
# We only want to do this for block-level HTML tags, such as headers,
# lists, and tables. That's because we still want to wrap <p>s around
# "paragraphs" that are wrapped in non-block-level tags, such as anchors,
# phrase emphasis, and spans. The list of tags we're looking for is
# hard-coded:
#
# * List "a" is made of tags which can be both inline or block-level.
# These will be treated block-level when the start tag is alone on
# its line, otherwise they're not matched here and will be taken as
# inline later.
# * List "b" is made of tags which are always block-level;
#
/**
* Hashify HTML blocks:
*
* We only want to do this for block-level HTML tags, such as headers,
* lists, and tables. That's because we still want to wrap <p>s around
* "paragraphs" that are wrapped in non-block-level tags, such as
* anchors, phrase emphasis, and spans. The list of tags we're looking
* for is hard-coded:
*
* * List "a" is made of tags which can be both inline or block-level.
* These will be treated block-level when the start tag is alone on
* its line, otherwise they're not matched here and will be taken as
* inline later.
* * List "b" is made of tags which are always block-level;
*/
$block_tags_a_re = 'ins|del';
$block_tags_b_re = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|address|'.
'script|noscript|style|form|fieldset|iframe|math|svg|'.
'article|section|nav|aside|hgroup|header|footer|'.
'figure';
# Regular expression for the content of a block tag.
// Regular expression for the content of a block tag.
$nested_tags_level = 4;
$attr = '
(?> # optional tag attributes
@ -263,7 +363,7 @@ class Markdown implements MarkdownInterface {
|
\'[^\']*\' # text inside single quotes (tolerate ">")
)*
)?
)?
';
$content =
str_repeat('
@ -275,29 +375,32 @@ class Markdown implements MarkdownInterface {
(?>
/>
|
>', $nested_tags_level). # end of opening tag
'.*?'. # last level nested tag content
>', $nested_tags_level). // end of opening tag
'.*?'. // last level nested tag content
str_repeat('
</\2\s*> # closing nested tag
)
|
|
<(?!/\2\s*> # other tags with a different name
)
)*',
$nested_tags_level);
$content2 = str_replace('\2', '\3', $content);
# First, look for nested blocks, e.g.:
# <div>
# <div>
# tags for inner block must be indented.
# </div>
# </div>
#
# The outermost tags must start at the left margin for this to match, and
# the inner nested divs must be indented.
# We need to do this before the next, more liberal match, because the next
# match will start at the first `<div>` and stop at the first `</div>`.
/**
* First, look for nested blocks, e.g.:
* <div>
* <div>
* tags for inner block must be indented.
* </div>
* </div>
*
* The outermost tags must start at the left margin for this to match,
* and the inner nested divs must be indented.
* We need to do this before the next, more liberal match, because the
* next match will start at the first `<div>` and stop at the
* first `</div>`.
*/
$text = preg_replace_callback('{(?>
(?>
(?<=\n) # Starting on its own line
@ -306,9 +409,9 @@ class Markdown implements MarkdownInterface {
)
( # save in $1
# Match from `\n<tag>` to `</tag>\n`, handling nested tags
# Match from `\n<tag>` to `</tag>\n`, handling nested tags
# in between.
[ ]{0,'.$less_than_tab.'}
<('.$block_tags_b_re.')# start tag = $2
'.$attr.'> # attributes followed by > and \n
@ -326,28 +429,28 @@ class Markdown implements MarkdownInterface {
</\3> # the matching end tag
[ ]* # trailing spaces/tabs
(?=\n+|\Z) # followed by a newline or end of document
| # Special case just for <hr />. It was easier to make a special
| # Special case just for <hr />. It was easier to make a special
# case than to make the other regex more complicated.
[ ]{0,'.$less_than_tab.'}
<(hr) # start tag = $2
'.$attr.' # attributes
/?> # the matching end tag
[ ]*
(?=\n{2,}|\Z) # followed by a blank line or end of document
| # Special case for standalone HTML comments:
[ ]{0,'.$less_than_tab.'}
(?s:
<!-- .*? -->
)
[ ]*
(?=\n{2,}|\Z) # followed by a blank line or end of document
| # PHP and ASP-style processor instructions (<? and <%)
[ ]{0,'.$less_than_tab.'}
(?s:
<([?%]) # $2
@ -356,98 +459,118 @@ class Markdown implements MarkdownInterface {
)
[ ]*
(?=\n{2,}|\Z) # followed by a blank line or end of document
)
)}Sxmi',
array($this, '_hashHTMLBlocks_callback'),
$text);
$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') {
#
# Called whenever a tag must be hashed when a function insert an atomic
# element in the text stream. Passing $text to through this function gives
# a unique text-token which will be reverted back when calling unhash.
#
# The $boundary argument specify what character should be used to surround
# the token. By convension, "B" is used for block elements that needs not
# to be wrapped into paragraph tags at the end, ":" is used for elements
# that are word separators and "X" is used in the general case.
#
# Swap back any tag hash found in $text so we do not have to `unhash`
# multiple times at the end.
// 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.
// 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.
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) {
#
# Shortcut function for hashPart with block-level boundaries.
#
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(
#
# These are all the transformations that form block-level
# tags like paragraphs, headers, and list items.
#
"doHeaders" => 10,
"doHorizontalRules" => 20,
"doLists" => 40,
"doCodeBlocks" => 50,
"doBlockQuotes" => 60,
);
);
/**
* 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) {
#
# Run block gamut tranformations.
#
# We need to escape raw HTML in Markdown source before doing anything
# else. This need to be done for each block, and not only at the
# begining in the Markdown function since hashed blocks can be part of
# list items and could have been indented. Indented blocks would have
# been seen as a code block in a previous pass of hashHTMLBlocks.
$text = $this->hashHTMLBlocks($text);
return $this->runBasicBlockGamut($text);
}
/**
* 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) {
#
# Run block gamut tranformations, without hashing HTML blocks. This is
# useful when HTML blocks are known to be already hashed, like in the first
# whole-document pass.
#
foreach ($this->block_gamut as $method => $priority) {
$text = $this->$method($text);
}
# Finally form paragraph and restore hashed blocks.
// 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) {
# Do Horizontal Rules:
return preg_replace(
'{
^[ ]{0,3} # Leading space
@ -459,67 +582,82 @@ class Markdown implements MarkdownInterface {
[ ]* # Tailing spaces
$ # End of line.
}mx',
"\n".$this->hashBlock("<hr$this->empty_element_suffix")."\n",
$text);
"\n".$this->hashBlock("<hr$this->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(
#
# These are all the transformations that occur *within* block-level
# tags like paragraphs, headers, and list items.
#
# Process character escapes, code spans, and inline HTML
# in one shot.
// 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.
// Process anchor and image tags. Images must come first,
// because ![foo][f] looks like an anchor.
"doImages" => 10,
"doAnchors" => 20,
# Make links out of things like `<http://example.com/>`
# Must come after doAnchors, because you can use < and >
# delimiters in inline links like [this](<url>).
// Make links out of things like `<https://example.com/>`
// Must come after doAnchors, because you can use < and >
// delimiters in inline links like [this](<url>).
"doAutoLinks" => 30,
"encodeAmpsAndAngles" => 40,
"doItalicsAndBold" => 50,
"doHardBreaks" => 60,
);
);
/**
* Run span gamut transformations
* @param string $text
* @return string
*/
protected function runSpanGamut($text) {
#
# Run span gamut tranformations.
#
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) {
# Do hard breaks:
return preg_replace_callback('/ {2,}\n/',
array($this, '_doHardBreaks_callback'), $text);
if ($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 $this->hashPart("<br$this->empty_element_suffix\n");
}
/**
* Turn Markdown link shortcuts into XHTML <a> tags.
* @param string $text
* @return string
*/
protected function doAnchors($text) {
#
# Turn Markdown link shortcuts into XHTML <a> tags.
#
if ($this->in_anchor) return $text;
if ($this->in_anchor) {
return $text;
}
$this->in_anchor = true;
#
# First, handle reference-style links: [link text] [id]
#
// First, handle reference-style links: [link text] [id]
$text = preg_replace_callback('{
( # wrap whole match in $1
\[
@ -536,9 +674,7 @@ class Markdown implements MarkdownInterface {
}xs',
array($this, '_doAnchors_reference_callback'), $text);
#
# Next, inline-style links: [link text](url "optional title")
#
// Next, inline-style links: [link text](url "optional title")
$text = preg_replace_callback('{
( # wrap whole match in $1
\[
@ -563,11 +699,9 @@ class Markdown implements MarkdownInterface {
}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)
#
// 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
\[
@ -580,48 +714,60 @@ class Markdown implements MarkdownInterface {
$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].
// for shortcut links like [this][] or [this].
$link_id = $link_text;
}
# lower-case and turn embedded newlines into spaces
// lower-case and turn embedded newlines into spaces
$link_id = strtolower($link_id);
$link_id = preg_replace('{[ ]?\n}', ' ', $link_id);
if (isset($this->urls[$link_id])) {
$url = $this->urls[$link_id];
$url = $this->encodeURLAttribute($url);
$result = "<a href=\"$url\"";
if ( isset( $this->titles[$link_id] ) ) {
$title = $this->titles[$link_id];
$title = $this->encodeAttribute($title);
$result .= " title=\"$title\"";
}
$link_text = $this->runSpanGamut($link_text);
$result .= ">$link_text</a>";
$result = $this->hashPart($result);
}
else {
} 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 <s p a c e s> it got caught by the HTML
// tag parser and hashed. Need to reverse the process before using the URL.
// If the URL was of the form <s p a c e s> it got caught by the HTML
// tag parser and hashed. Need to reverse the process before using
// the URL.
$unhashed = $this->unhash($url);
if ($unhashed != $url)
$url = preg_replace('/^<(.*)>$/', '\1', $unhashed);
@ -633,21 +779,20 @@ class Markdown implements MarkdownInterface {
$title = $this->encodeAttribute($title);
$result .= " title=\"$title\"";
}
$link_text = $this->runSpanGamut($link_text);
$result .= ">$link_text</a>";
return $this->hashPart($result);
}
/**
* Turn Markdown image shortcuts into <img> tags.
* @param string $text
* @return string
*/
protected function doImages($text) {
#
# Turn Markdown image shortcuts into <img> tags.
#
#
# First, handle reference-style labeled images: ![alt text][id]
#
// First, handle reference-style labeled images: ![alt text][id]
$text = preg_replace_callback('{
( # wrap whole match in $1
!\[
@ -662,13 +807,11 @@ class Markdown implements MarkdownInterface {
\]
)
}xs',
}xs',
array($this, '_doImages_reference_callback'), $text);
#
# Next, handle inline images: ![alt text](url "optional title")
# Don't forget: encode * and _
#
// Next, handle inline images: ![alt text](url "optional title")
// Don't forget: encode * and _
$text = preg_replace_callback('{
( # wrap whole match in $1
!\[
@ -696,13 +839,19 @@ class Markdown implements MarkdownInterface {
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][].
$link_id = strtolower($alt_text); // for shortcut links like ![this][].
}
$alt_text = $this->encodeAttribute($alt_text);
@ -716,14 +865,19 @@ class Markdown implements MarkdownInterface {
}
$result .= $this->empty_element_suffix;
$result = $this->hashPart($result);
}
else {
# If there's no such link ID, leave intact:
} 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];
@ -735,32 +889,38 @@ class Markdown implements MarkdownInterface {
$result = "<img src=\"$url\" alt=\"$alt_text\"";
if (isset($title)) {
$title = $this->encodeAttribute($title);
$result .= " title=\"$title\""; # $title already quoted
$result .= " title=\"$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
# --------
#
/**
* 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
#
/**
* atx-style headers:
* # Header 1
* ## Header 2
* ## Header 2 with closing hashes ##
* ...
* ###### Header 6
*/
$text = preg_replace_callback('{
^(\#{1,6}) # $1 = string of #\'s
[ ]*
@ -773,29 +933,72 @@ class Markdown implements MarkdownInterface {
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 ($matches[2] == '-' && preg_match('{^-(?: |$)}', $matches[1]))
// Terrible hack to check we haven't found an empty list item.
if ($matches[2] == '-' && preg_match('{^-(?: |$)}', $matches[1])) {
return $matches[0];
}
$level = $matches[2]{0} == '=' ? 1 : 2;
$block = "<h$level>".$this->runSpanGamut($matches[1])."</h$level>";
// ID attribute generation
$idAtt = $this->_generateIdFromHeaderValue($matches[1]);
$block = "<h$level$idAtt>".$this->runSpanGamut($matches[1])."</h$level>";
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]);
$block = "<h$level>".$this->runSpanGamut($matches[2])."</h$level>";
$block = "<h$level$idAtt>".$this->runSpanGamut($matches[2])."</h$level>";
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) {
#
# Form HTML ordered (numbered) and unordered (bulleted) lists.
#
$less_than_tab = $this->tab_width - 1;
# Re-usable patterns to match list item bullets and number markers:
// Re-usable patterns to match list item bullets and number markers:
$marker_ul_re = '[*+-]';
$marker_ol_re = '\d+[\.]';
@ -805,7 +1008,7 @@ class Markdown implements MarkdownInterface {
);
foreach ($markers_relist as $marker_re => $other_marker_re) {
# Re-usable pattern to match any entirel ul or ol list:
// Re-usable pattern to match any entirel ul or ol list:
$whole_list_re = '
( # $1 = whole list
( # $2
@ -832,18 +1035,17 @@ class Markdown implements MarkdownInterface {
)
)
'; // mx
# We use a different prefix before nested lists than top-level lists.
# See extended comment in _ProcessListItems().
// We use a different prefix before nested lists than top-level lists.
//See extended comment in _ProcessListItems().
if ($this->list_level) {
$text = preg_replace_callback('{
^
'.$whole_list_re.'
}mx',
array($this, '_doLists_callback'), $text);
}
else {
} else {
$text = preg_replace_callback('{
(?:(?<=\n)\n|\A\n?) # Must eat the newline
'.$whole_list_re.'
@ -854,55 +1056,86 @@ class Markdown implements MarkdownInterface {
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:
// 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);
$result = $this->hashBlock("<$list_type>\n" . $result . "</$list_type>");
$ol_start = 1;
if ($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" . $result . "</$list_type>");
} else {
$result = $this->hashBlock("<$list_type>\n" . $result . "</$list_type>");
}
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) {
#
# Process the contents of a single ordered or unordered list, splitting it
# into individual list items.
#
# The $this->list_level global keeps track of when we're inside a list.
# Each time we enter a list, we increment it; when we leave a list,
# we decrement. If it's zero, we're not in a list anymore.
#
# We do this because when we're not inside a list, we want to treat
# something like this:
#
# I recommend upgrading to version
# 8. Oops, now this line is treated
# as a sub-list.
#
# As a single paragraph, despite the fact that the second line starts
# with a digit-period-space sequence.
#
# Whereas when we're inside a list (or sub-list), that line will be
# treated as the start of a sub-list. What a kludge, huh? This is
# an aspect of Markdown's syntax that's hard to parse perfectly
# without resorting to mind-reading. Perhaps the solution is to
# change the syntax rules such that sub-lists must start with a
# starting cardinal number; e.g. "1." or "a.".
/**
* 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:
// Trim trailing blank lines:
$list_str = preg_replace("/\n{2,}\\z/", "\n", $list_str);
$list_str = preg_replace_callback('{
@ -920,6 +1153,12 @@ class Markdown implements MarkdownInterface {
$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];
@ -927,28 +1166,27 @@ class Markdown implements MarkdownInterface {
$marker_space = $matches[3];
$tailing_blank_line =& $matches[5];
if ($leading_line || $tailing_blank_line ||
if ($leading_line || $tailing_blank_line ||
preg_match('/\n{2,}/', $item))
{
# Replace marker with the appropriate whitespace indentation
// 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:
} else {
// Recursion for sub-lists:
$item = $this->doLists($this->outdent($item));
$item = preg_replace('/\n+$/', '', $item);
$item = $this->runSpanGamut($item);
$item = $this->formParagraphs($item, false);
}
return "<li>" . $item . "</li>\n";
}
/**
* Process Markdown `<pre><code>` blocks.
* @param string $text
* @return string
*/
protected function doCodeBlocks($text) {
#
# Process Markdown `<pre><code>` blocks.
#
$text = preg_replace_callback('{
(?:\n\n|\A\n?)
( # $1 = the code block -- one or more lines, starting with a space/tab
@ -963,106 +1201,141 @@ class Markdown implements MarkdownInterface {
return $text;
}
/**
* Code block parsing callback
* @param array $matches
* @return string
*/
protected function _doCodeBlocks_callback($matches) {
$codeblock = $matches[1];
$codeblock = $this->outdent($codeblock);
$codeblock = htmlspecialchars($codeblock, ENT_NOQUOTES);
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);
$codeblock = "<pre><code>$codeblock\n</code></pre>";
return "\n\n".$this->hashBlock($codeblock)."\n\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) {
#
# Create a code span markup for $code. Called from handleSpanToken.
#
$code = htmlspecialchars(trim($code), ENT_NOQUOTES);
if ($this->code_span_content_func) {
$code = call_user_func($this->code_span_content_func, $code);
} else {
$code = htmlspecialchars(trim($code), ENT_NOQUOTES);
}
return $this->hashPart("<code>$code</code>");
}
/**
* Define the emphasis operators with their regex matches
* @var array
*/
protected $em_relist = array(
'' => '(?:(?<!\*)\*(?!\*)|(?<!_)_(?!_))(?![\.,:;]?\s)',
'*' => '(?<![\s*])\*(?!\*)',
'_' => '(?<![\s_])_(?!_)',
);
);
/**
* Define the strong operators with their regex matches
* @var array
*/
protected $strong_relist = array(
'' => '(?:(?<!\*)\*\*(?!\*)|(?<!_)__(?!_))(?![\.,:;]?\s)',
'**' => '(?<![\s*])\*\*(?!\*)',
'__' => '(?<![\s_])__(?!_)',
);
);
/**
* Define the emphasis + strong operators with their regex matches
* @var array
*/
protected $em_strong_relist = array(
'' => '(?:(?<!\*)\*\*\*(?!\*)|(?<!_)___(?!_))(?![\.,:;]?\s)',
'***' => '(?<![\s*])\*\*\*(?!\*)',
'___' => '(?<![\s_])___(?!_)',
);
);
/**
* Container for prepared regular expressions
* @var array
*/
protected $em_strong_prepared_relist;
/**
* Prepare regular expressions for searching emphasis tokens in any
* context.
* @return void
*/
protected function prepareItalicsAndBold() {
#
# Prepare regular expressions for searching emphasis tokens in any
# context.
#
foreach ($this->em_relist as $em => $em_re) {
foreach ($this->strong_relist as $strong => $strong_re) {
# Construct list of allowed token expressions.
// 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) .')}';
// 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.
#
// 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.
#
// 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.
// 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 ($tree_char_em) {
# Reached closing marker while inside a three-char emphasis.
// Reached closing marker while inside a three-char emphasis.
if ($token_len == 3) {
# Three-char closing marker, close em and strong.
// Three-char closing marker, close em and strong.
array_shift($token_stack);
$span = array_shift($text_stack);
$span = $this->runSpanGamut($span);
@ -1071,21 +1344,21 @@ class Markdown implements MarkdownInterface {
$em = '';
$strong = '';
} else {
# Other closing marker: close one em or strong and
# change current token state to match the other
// Other closing marker: close one em or strong and
// change current token state to match the other
$token_stack[0] = str_repeat($token{0}, 3-$token_len);
$tag = $token_len == 2 ? "strong" : "em";
$span = $text_stack[0];
$span = $this->runSpanGamut($span);
$span = "<$tag>$span</$tag>";
$text_stack[0] = $this->hashPart($span);
$$tag = ''; # $$tag stands for $em or $strong
$$tag = ''; // $$tag stands for $em or $strong
}
$tree_char_em = false;
} else if ($token_len == 3) {
if ($em) {
# Reached closing marker for both em and strong.
# Closing strong marker:
// Reached closing marker for both em and strong.
// Closing strong marker:
for ($i = 0; $i < 2; ++$i) {
$shifted_token = array_shift($token_stack);
$tag = strlen($shifted_token) == 2 ? "strong" : "em";
@ -1093,11 +1366,11 @@ class Markdown implements MarkdownInterface {
$span = $this->runSpanGamut($span);
$span = "<$tag>$span</$tag>";
$text_stack[0] .= $this->hashPart($span);
$$tag = ''; # $$tag stands for $em or $strong
$$tag = ''; // $$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.
// 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, $token);
@ -1106,12 +1379,12 @@ class Markdown implements MarkdownInterface {
}
} else if ($token_len == 2) {
if ($strong) {
# Unwind any dangling emphasis marker:
// Unwind any dangling emphasis marker:
if (strlen($token_stack[0]) == 1) {
$text_stack[1] .= array_shift($token_stack);
$text_stack[0] .= array_shift($text_stack);
}
# Closing strong marker:
// Closing strong marker:
array_shift($token_stack);
$span = array_shift($text_stack);
$span = $this->runSpanGamut($span);
@ -1124,10 +1397,10 @@ class Markdown implements MarkdownInterface {
$strong = $token;
}
} else {
# Here $token_len == 1
// Here $token_len == 1
if ($em) {
if (strlen($token_stack[0]) == 1) {
# Closing emphasis marker:
// Closing emphasis marker:
array_shift($token_stack);
$span = array_shift($text_stack);
$span = $this->runSpanGamut($span);
@ -1147,7 +1420,11 @@ class Markdown implements MarkdownInterface {
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
@ -1163,51 +1440,64 @@ class Markdown implements MarkdownInterface {
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
// trim one level of quoting - trim whitespace-only lines
$bq = preg_replace('/^[ ]*>[ ]?|^[ ]+$/m', '', $bq);
$bq = $this->runBlockGamut($bq); # recurse
$bq = $this->runBlockGamut($bq); // recurse
$bq = preg_replace('/^/m', " ", $bq);
# These leading spaces cause problem with <pre> content,
# so we need to fix that:
$bq = preg_replace_callback('{(\s*<pre>.+?</pre>)}sx',
// These leading spaces cause problem with <pre> content,
// so we need to fix that:
$bq = preg_replace_callback('{(\s*<pre>.+?</pre>)}sx',
array($this, '_doBlockQuotes_callback2'), $bq);
return "\n". $this->hashBlock("<blockquote>\n$bq\n</blockquote>")."\n\n";
return "\n" . $this->hashBlock("<blockquote>\n$bq\n</blockquote>") . "\n\n";
}
/**
* Blockquote parsing callback
* @param array $matches
* @return string
*/
protected function _doBlockQuotes_callback2($matches) {
$pre = $matches[1];
$pre = preg_replace('/^ /m', '', $pre);
return $pre;
}
protected function formParagraphs($text) {
#
# Params:
# $text - string to process with html <p> tags
#
# Strip leading and trailing lines:
/**
* Parse paragraphs
*
* @param string $text String to process in paragraphs
* @param boolean $wrap_in_p Whether paragraphs should be wrapped in <p> tags
* @return string
*/
protected function formParagraphs($text, $wrap_in_p = true) {
// Strip leading and trailing lines:
$text = preg_replace('/\A\n+|\n+\z/', '', $text);
$grafs = preg_split('/\n{2,}/', $text, -1, PREG_SPLIT_NO_EMPTY);
#
# Wrap <p> tags and unhashify HTML blocks
#
// Wrap <p> tags and unhashify HTML blocks
foreach ($grafs as $key => $value) {
if (!preg_match('/^B\x1A[0-9]+B$/', $value)) {
# Is a paragraph.
// Is a paragraph.
$value = $this->runSpanGamut($value);
$value = preg_replace('/^([ ]*)/', "<p>", $value);
$value .= "</p>";
if ($wrap_in_p) {
$value = preg_replace('/^([ ]*)/', "<p>", $value);
$value .= "</p>";
}
$grafs[$key] = $this->unhash($value);
}
else {
# Is a block.
# Modify elements of @grafs in-place...
} else {
// Is a block.
// Modify elements of @grafs in-place...
$graf = $value;
$block = $this->html_hashes[$graf];
$graf = $block;
@ -1232,11 +1522,11 @@ class Markdown implements MarkdownInterface {
// {
// 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.
// // 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.
//
// // Run document gamut methods on the content.
// foreach ($this->document_gamut as $method => $priority) {
// $div_content = $this->$method($div_content);
// }
@ -1253,71 +1543,78 @@ class Markdown implements MarkdownInterface {
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) {
#
# Encode text for a double-quoted HTML attribute. This function
# is *not* suitable for attributes enclosed in single quotes.
#
$text = $this->encodeAmpsAndAngles($text);
$text = str_replace('"', '&quot;', $text);
return $text;
}
/**
* 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) {
#
# Encode text for a double-quoted HTML attribute containing a URL,
# applying the URL filter if set. Also generates the textual
# representation for the URL (removing mailto: or tel:) storing it in $text.
# This function is *not* suitable for attributes enclosed in single quotes.
#
if ($this->url_filter_func)
if ($this->url_filter_func) {
$url = call_user_func($this->url_filter_func, $url);
}
if (preg_match('{^mailto:}i', $url))
if (preg_match('{^mailto:}i', $url)) {
$url = $this->encodeEntityObfuscatedAttribute($url, $text, 7);
else if (preg_match('{^tel:}i', $url))
{
} else if (preg_match('{^tel:}i', $url)) {
$url = $this->encodeAttribute($url);
$text = substr($url, 4);
}
else
{
} 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) {
#
# Smart processing for ampersands and angle brackets that need to
# be encoded. Valid character entities are left alone unless the
# no-entities mode is set.
#
if ($this->no_entities) {
$text = str_replace('&', '&amp;', $text);
} else {
# Ampersand-encoding based entirely on Nat Irons's Amputator
# MT plugin: <http://bumppo.net/projects/amputator/>
$text = preg_replace('/&(?!#?[xX]?(?:[0-9a-fA-F]+|\w+);)/',
// Ampersand-encoding based entirely on Nat Irons's Amputator
// MT plugin: <http://bumppo.net/projects/amputator/>
$text = preg_replace('/&(?!#?[xX]?(?:[0-9a-fA-F]+|\w+);)/',
'&amp;', $text);
}
# Encode remaining <'s
// Encode remaining <'s
$text = str_replace('<', '&lt;', $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: <address@domain.foo>
// Email addresses: <address@domain.foo>
$text = preg_replace_callback('{
<
(?:mailto:)?
@ -1340,11 +1637,23 @@ class Markdown implements MarkdownInterface {
return $text;
}
/**
* Parse URL callback
* @param array $matches
* @return string
*/
protected function _doAutoLinks_url_callback($matches) {
$url = $this->encodeURLAttribute($matches[1], $text);
$link = "<a href=\"$url\">$text</a>";
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);
@ -1352,42 +1661,52 @@ class Markdown implements MarkdownInterface {
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.:
*
* &#109;&#x61;&#105;&#x6c;&#116;&#x6f;&#58;&#x66;o&#111;
* &#x40;&#101;&#x78;&#97;&#x6d;&#112;&#x6c;&#101;&#46;&#x63;&#111;
* &#x6d;
*
* Note: the additional output $tail is assigned the same value as the
* ouput, minus the number of characters specified by $head_length.
*
* Based by a filter by Matthew Wickline, posted to BBEdit-Talk.
* With some optimizations by Milian Wolff. Forced encoding of HTML
* attribute special characters by Allan Odgaard.
*
* @param string $text
* @param string &$tail
* @param integer $head_length
* @return string
*/
protected function encodeEntityObfuscatedAttribute($text, &$tail = null, $head_length = 0) {
#
# Input: some text to obfuscate, e.g. "mailto:foo@example.com"
#
# Output: the same text but with most characters encoded as either a
# decimal or hex entity, in the hopes of foiling most address
# harvesting spam bots. E.g.:
#
# &#109;&#x61;&#105;&#x6c;&#116;&#x6f;&#58;&#x66;o&#111;
# &#x40;&#101;&#x78;&#97;&#x6d;&#112;&#x6c;&#101;&#46;&#x63;&#111;
# &#x6d;
#
# Note: the additional output $tail is assigned the same value as the
# ouput, minus the number of characters specified by $head_length.
#
# Based by a filter by Matthew Wickline, posted to BBEdit-Talk.
# With some optimizations by Milian Wolff. Forced encoding of HTML
# attribute special characters by Allan Odgaard.
#
if ($text == "") return $tail = "";
if ($text == "") {
return $tail = "";
}
$chars = preg_split('/(?<!^)(?!$)/', $text);
$seed = (int)abs(crc32($text) / strlen($text)); # Deterministic seed.
$seed = (int)abs(crc32($text) / strlen($text)); // Deterministic seed.
foreach ($chars as $key => $char) {
$ord = ord($char);
# Ignore non-ascii chars.
// 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.';';
$r = ($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.';';
}
}
}
@ -1397,14 +1716,15 @@ class Markdown implements MarkdownInterface {
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) {
#
# Take the string $str and parse it into tokens, hashing embeded HTML,
# escaped characters and handling code spans.
#
$output = '';
$span_re = '{
(
\\\\'.$this->escape_chars_re.'
@ -1432,1720 +1752,145 @@ class Markdown implements MarkdownInterface {
}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.
#
// 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, $str, 2, PREG_SPLIT_DELIM_CAPTURE);
# Create token from text preceding tag.
// Create token from text preceding tag.
if ($parts[0] != "") {
$output .= $parts[0];
}
# Check if we reach the end.
// Check if we reach the end.
if (isset($parts[1])) {
$output .= $this->handleSpanToken($parts[1], $parts[2]);
$str = $parts[2];
}
else {
} 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) {
#
# Handle $token provided by parseSpan by determining its nature and
# returning the corresponding value that should replace it.
#
switch ($token{0}) {
case "\\":
return $this->hashPart("&#". ord($token{1}). ";");
case "`":
# Search for end marker in remaining text.
if (preg_match('/^(.*?[^`])'.preg_quote($token).'(?!`)(.*)$/sm',
// 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.
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) {
#
# Remove one level of line-leading tabs or spaces
#
return preg_replace('/^(\t|[ ]{1,'.$this->tab_width.'})/m', '', $text);
return preg_replace('/^(\t|[ ]{1,' . $this->tab_width . '})/m', '', $text);
}
# String length function for detab. `_initDetab` will create a function to
# hanlde UTF-8 if the default function does not exist.
/**
* 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) {
#
# Replace tabs with the appropriate amount of space.
#
# For each line we separate the line in blocks delemited by
# tab characters. Then we reconstruct every line by adding the
# appropriate number of space between each blocks.
$text = preg_replace_callback('/^.*\t.*$/m',
array($this, '_detab_callback'), $text);
return $text;
}
/**
* 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.
$strlen = $this->utf8_strlen; // strlen function for UTF-8.
// Split in blocks.
$blocks = explode("\t", $line);
# Add each blocks to the line.
// Add each blocks to the line.
$line = $blocks[0];
unset($blocks[0]); # Do not add first block twice.
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 -
// 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 $line;
}
/**
* Check for the availability of the function in the `utf8_strlen` property
* (initially `mb_strlen`). If the function is not available, create a
* function that will loosely count the number of UTF-8 characters with a
* regular expression.
* @return void
*/
protected function _initDetab() {
#
# Check for the availability of the function in the `utf8_strlen` property
# (initially `mb_strlen`). If the function is not available, create a
# function that will loosely count the number of UTF-8 characters with a
# regular expression.
#
if (function_exists($this->utf8_strlen)) return;
if (function_exists($this->utf8_strlen)) {
return;
}
$this->utf8_strlen = create_function('$text', 'return preg_match_all(
"/[\\\\x00-\\\\xBF]|[\\\\xC0-\\\\xFF][\\\\x80-\\\\xBF]*/",
"/[\\\\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) {
#
# Swap back in all the tags hashed by _HashHTMLBlocks.
#
return preg_replace_callback('/(.)\x1A[0-9]+\1/',
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]];
}
}
#
# Temporary Markdown Extra Parser Implementation Class
#
# NOTE: DON'T USE THIS CLASS
# Currently the implementation of of Extra resides here in this temporary class.
# This makes it easier to propagate the changes between the three different
# packaging styles of PHP Markdown. When this issue is resolved, this
# MarkdownExtra_TmpImpl class here will disappear and \Michelf\MarkdownExtra
# will contain the code. So please use \Michelf\MarkdownExtra and ignore this
# one.
#
abstract class _MarkdownExtra_TmpImpl extends \Michelf\Markdown {
### Configuration Variables ###
# Prefix for footnote ids.
public $fn_id_prefix = "";
# Optional title attribute for footnote links and backlinks.
public $fn_link_title = "";
public $fn_backlink_title = "";
# Optional class attribute for footnote links and backlinks.
public $fn_link_class = "footnote-ref";
public $fn_backlink_class = "footnote-backref";
# Class name for table cell alignment (%% replaced left/center/right)
# For instance: 'go-%%' becomes 'go-left' or 'go-right' or 'go-center'
# If empty, the align attribute is used instead of a class name.
public $table_align_class_tmpl = '';
# Optional class prefix for fenced code block.
public $code_class_prefix = "";
# Class attribute for code blocks goes on the `code` tag;
# setting this to true will put attributes on the `pre` tag instead.
public $code_attr_on_pre = false;
# Predefined abbreviations.
public $predef_abbr = array();
### Parser Implementation ###
public function __construct() {
#
# Constructor function. Initialize the parser object.
#
# Add extra escapable characters before parent constructor
# initialize the table.
$this->escape_chars .= ':|';
# Insert extra document, block, and span transformations.
# Parent constructor will do the sorting.
$this->document_gamut += array(
"doFencedCodeBlocks" => 5,
"stripFootnotes" => 15,
"stripAbbreviations" => 25,
"appendFootnotes" => 50,
);
$this->block_gamut += array(
"doFencedCodeBlocks" => 5,
"doTables" => 15,
"doDefLists" => 45,
);
$this->span_gamut += array(
"doFootnotes" => 5,
"doAbbreviations" => 70,
);
parent::__construct();
}
# Extra variables used during extra transformations.
protected $footnotes = array();
protected $footnotes_ordered = array();
protected $footnotes_ref_count = array();
protected $footnotes_numbers = array();
protected $abbr_desciptions = array();
protected $abbr_word_re = '';
# Give the current footnote number.
protected $footnote_counter = 1;
protected function setup() {
#
# Setting up Extra-specific variables.
#
parent::setup();
$this->footnotes = array();
$this->footnotes_ordered = array();
$this->footnotes_ref_count = array();
$this->footnotes_numbers = array();
$this->abbr_desciptions = array();
$this->abbr_word_re = '';
$this->footnote_counter = 1;
foreach ($this->predef_abbr as $abbr_word => $abbr_desc) {
if ($this->abbr_word_re)
$this->abbr_word_re .= '|';
$this->abbr_word_re .= preg_quote($abbr_word);
$this->abbr_desciptions[$abbr_word] = trim($abbr_desc);
}
}
protected function teardown() {
#
# Clearing Extra-specific variables.
#
$this->footnotes = array();
$this->footnotes_ordered = array();
$this->footnotes_ref_count = array();
$this->footnotes_numbers = array();
$this->abbr_desciptions = array();
$this->abbr_word_re = '';
parent::teardown();
}
### Extra Attribute Parser ###
# Expression to use to catch attributes (includes the braces)
protected $id_class_attr_catch_re = '\{((?:[ ]*[#.a-z][-_:a-zA-Z0-9=]+){1,})[ ]*\}';
# Expression to use when parsing in a context when no capture is desired
protected $id_class_attr_nocatch_re = '\{(?:[ ]*[#.a-z][-_:a-zA-Z0-9=]+){1,}[ ]*\}';
protected function doExtraAttributes($tag_name, $attr) {
#
# Parse attributes caught by the $this->id_class_attr_catch_re expression
# and return the HTML-formatted list of attributes.
#
# Currently supported attributes are .class and #id.
#
if (empty($attr)) return "";
# Split on components
preg_match_all('/[#.a-z][-_:a-zA-Z0-9=]+/', $attr, $matches);
$elements = $matches[0];
# handle classes and ids (only first id taken into account)
$classes = array();
$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] . '"';
}
}
# compose attributes as string
$attr_str = "";
if (!empty($id)) {
$attr_str .= ' id="'.$id.'"';
}
if (!empty($classes)) {
$attr_str .= ' class="'.implode(" ", $classes).'"';
}
if (!$this->no_markup && !empty($attributes)) {
$attr_str .= ' '.implode(" ", $attributes);
}
return $attr_str;
}
protected function stripLinkDefinitions($text) {
#
# Strips link definitions from text, stores the URLs and titles in
# hash references.
#
$less_than_tab = $this->tab_width - 1;
# Link defs are in the form: ^[id]: url "optional title"
$text = preg_replace_callback('{
^[ ]{0,'.$less_than_tab.'}\[(.+)\][ ]?: # id = $1
[ ]*
\n? # maybe *one* newline
[ ]*
(?:
<(.+?)> # url = $2
|
(\S+?) # url = $3
)
[ ]*
\n? # maybe one newline
[ ]*
(?:
(?<=\s) # lookbehind for whitespace
["(]
(.*?) # title = $4
[")]
[ ]*
)? # title is optional
(?:[ ]* '.$this->id_class_attr_catch_re.' )? # $5 = extra id & class attr
(?:\n+|\Z)
}xm',
array($this, '_stripLinkDefinitions_callback'),
$text);
return $text;
}
protected function _stripLinkDefinitions_callback($matches) {
$link_id = strtolower($matches[1]);
$url = $matches[2] == '' ? $matches[3] : $matches[2];
$this->urls[$link_id] = $url;
$this->titles[$link_id] =& $matches[4];
$this->ref_attr[$link_id] = $this->doExtraAttributes("", $dummy =& $matches[5]);
return ''; # String that will replace the block
}
### HTML Block Parser ###
# Tags that are always treated as block tags:
protected $block_tags_re = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|address|form|fieldset|iframe|hr|legend|article|section|nav|aside|hgroup|header|footer|figcaption|figure';
# Tags treated as block tags only if the opening tag is alone on its line:
protected $context_block_tags_re = 'script|noscript|style|ins|del|iframe|object|source|track|param|math|svg|canvas|audio|video';
# Tags where markdown="1" default to span mode:
protected $contain_span_tags_re = 'p|h[1-6]|li|dd|dt|td|th|legend|address';
# Tags which must not have their contents modified, no matter where
# they appear:
protected $clean_tags_re = 'script|style|math|svg';
# Tags that do not need to be closed.
protected $auto_close_tags_re = 'hr|img|param|source|track';
protected function hashHTMLBlocks($text) {
#
# Hashify HTML Blocks and "clean tags".
#
# We only want to do this for block-level HTML tags, such as headers,
# lists, and tables. That's because we still want to wrap <p>s around
# "paragraphs" that are wrapped in non-block-level tags, such as anchors,
# phrase emphasis, and spans. The list of tags we're looking for is
# hard-coded.
#
# This works by calling _HashHTMLBlocks_InMarkdown, which then calls
# _HashHTMLBlocks_InHTML when it encounter block tags. When the markdown="1"
# attribute is found within a tag, _HashHTMLBlocks_InHTML calls back
# _HashHTMLBlocks_InMarkdown to handle the Markdown syntax within the tag.
# These two functions are calling each other. It's recursive!
#
if ($this->no_markup) return $text;
#
# Call the HTML-in-Markdown hasher.
#
list($text, ) = $this->_hashHTMLBlocks_inMarkdown($text);
return $text;
}
protected function _hashHTMLBlocks_inMarkdown($text, $indent = 0,
$enclosing_tag_re = '', $span = false)
{
#
# Parse markdown text, calling _HashHTMLBlocks_InHTML for block tags.
#
# * $indent is the number of space to be ignored when checking for code
# blocks. This is important because if we don't take the indent into
# account, something like this (which looks right) won't work as expected:
#
# <div>
# <div markdown="1">
# Hello World. <-- Is this a Markdown code block or text?
# </div> <-- Is this a Markdown code block or a real tag?
# <div>
#
# If you don't like this, just don't indent the tag on which
# you apply the markdown="1" attribute.
#
# * If $enclosing_tag_re is not empty, stops at the first unmatched closing
# tag with that name. Nested tags supported.
#
# * If $span is true, text inside must treated as span. So any double
# newline will be replaced by a single newline so that it does not create
# paragraphs.
#
# Returns an array of that form: ( processed text , remaining text )
#
if ($text === '') return array('', '');
# Regex to check for the presense of newlines around a block tag.
$newline_before_re = '/(?:^\n?|\n\n)*$/';
$newline_after_re =
'{
^ # Start of text following the tag.
(?>[ ]*<!--.*?-->)? # Optional comment.
[ ]*\n # Must be followed by newline.
}xs';
# Regex to match any tag.
$block_tag_re =
'{
( # $2: Capture whole tag.
</? # Any opening or closing tag.
(?> # Tag name.
'.$this->block_tags_re.' |
'.$this->context_block_tags_re.' |
'.$this->clean_tags_re.' |
(?!\s)'.$enclosing_tag_re.'
)
(?:
(?=[\s"\'/a-zA-Z0-9]) # Allowed characters after tag name.
(?>
".*?" | # Double quotes (can contain `>`)
\'.*?\' | # Single quotes (can contain `>`)
.+? # Anything but quotes and `>`.
)*?
)?
> # End of tag.
|
<!-- .*? --> # HTML Comment
|
<\?.*?\?> | <%.*?%> # Processing instruction
|
<!\[CDATA\[.*?\]\]> # CData Block
'. ( !$span ? ' # If not in span.
|
# Indented code block
(?: ^[ ]*\n | ^ | \n[ ]*\n )
[ ]{'.($indent+4).'}[^\n]* \n
(?>
(?: [ ]{'.($indent+4).'}[^\n]* | [ ]* ) \n
)*
|
# Fenced code block marker
(?<= ^ | \n )
[ ]{0,'.($indent+3).'}(?:~{3,}|`{3,})
[ ]*
(?:
\.?[-_:a-zA-Z0-9]+ # standalone class name
|
'.$this->id_class_attr_nocatch_re.' # extra attributes
)?
[ ]*
(?= \n )
' : '' ). ' # End (if not is span).
|
# Code span marker
# Note, this regex needs to go after backtick fenced
# code blocks but it should also be kept outside of the
# "if not in span" condition adding backticks to the parser
`+
)
}xs';
$depth = 0; # Current depth inside the tag tree.
$parsed = ""; # Parsed text that will be returned.
#
# Loop through every tag until we find the closing tag of the parent
# or loop until reaching the end of text if no parent tag specified.
#
do {
#
# Split the text using the first $tag_match pattern found.
# Text before pattern will be first in the array, text after
# pattern will be at the end, and between will be any catches made
# by the pattern.
#
$parts = preg_split($block_tag_re, $text, 2,
PREG_SPLIT_DELIM_CAPTURE);
# If in Markdown span mode, add a empty-string span-level hash
# after each newline to prevent triggering any block element.
if ($span) {
$void = $this->hashPart("", ':');
$newline = "$void\n";
$parts[0] = $void . str_replace("\n", $newline, $parts[0]) . $void;
}
$parsed .= $parts[0]; # Text before current tag.
# If end of $text has been reached. Stop loop.
if (count($parts) < 3) {
$text = "";
break;
}
$tag = $parts[1]; # Tag to handle.
$text = $parts[2]; # Remaining text after current tag.
$tag_re = preg_quote($tag); # For use in a regular expression.
#
# Check for: Fenced code block marker.
# Note: need to recheck the whole tag to disambiguate backtick
# fences from code spans
#
if (preg_match('{^\n?([ ]{0,'.($indent+3).'})(~{3,}|`{3,})[ ]*(?:\.?[-_:a-zA-Z0-9]+|'.$this->id_class_attr_nocatch_re.')?[ ]*\n?$}', $tag, $capture)) {
# Fenced code block marker: find matching end marker.
$fence_indent = strlen($capture[1]); # use captured indent in re
$fence_re = $capture[2]; # use captured fence in re
if (preg_match('{^(?>.*\n)*?[ ]{'.($fence_indent).'}'.$fence_re.'[ ]*(?:\n|$)}', $text,
$matches))
{
# End marker found: pass text unchanged until marker.
$parsed .= $tag . $matches[0];
$text = substr($text, strlen($matches[0]));
}
else {
# No end marker: just skip it.
$parsed .= $tag;
}
}
#
# Check for: Indented code block.
#
else if ($tag{0} == "\n" || $tag{0} == " ") {
# Indented code block: pass it unchanged, will be handled
# later.
$parsed .= $tag;
}
#
# Check for: Code span marker
# Note: need to check this after backtick fenced code blocks
#
else if ($tag{0} == "`") {
# Find corresponding end marker.
$tag_re = preg_quote($tag);
if (preg_match('{^(?>.+?|\n(?!\n))*?(?<!`)'.$tag_re.'(?!`)}',
$text, $matches))
{
# End marker found: pass text unchanged until marker.
$parsed .= $tag . $matches[0];
$text = substr($text, strlen($matches[0]));
}
else {
# Unmatched marker: just skip it.
$parsed .= $tag;
}
}
#
# Check for: Opening Block level tag or
# Opening Context Block tag (like ins and del)
# used as a block tag (tag is alone on it's line).
#
else if (preg_match('{^<(?:'.$this->block_tags_re.')\b}', $tag) ||
( preg_match('{^<(?:'.$this->context_block_tags_re.')\b}', $tag) &&
preg_match($newline_before_re, $parsed) &&
preg_match($newline_after_re, $text) )
)
{
# Need to parse tag and following text using the HTML parser.
list($block_text, $text) =
$this->_hashHTMLBlocks_inHTML($tag . $text, "hashBlock", true);
# Make sure it stays outside of any paragraph by adding newlines.
$parsed .= "\n\n$block_text\n\n";
}
#
# Check for: Clean tag (like script, math)
# HTML Comments, processing instructions.
#
else if (preg_match('{^<(?:'.$this->clean_tags_re.')\b}', $tag) ||
$tag{1} == '!' || $tag{1} == '?')
{
# Need to parse tag and following text using the HTML parser.
# (don't check for markdown attribute)
list($block_text, $text) =
$this->_hashHTMLBlocks_inHTML($tag . $text, "hashClean", false);
$parsed .= $block_text;
}
#
# Check for: Tag with same name as enclosing tag.
#
else if ($enclosing_tag_re !== '' &&
# Same name as enclosing tag.
preg_match('{^</?(?:'.$enclosing_tag_re.')\b}', $tag))
{
#
# Increase/decrease nested tag count.
#
if ($tag{1} == '/') $depth--;
else if ($tag{strlen($tag)-2} != '/') $depth++;
if ($depth < 0) {
#
# Going out of parent element. Clean up and break so we
# return to the calling function.
#
$text = $tag . $text;
break;
}
$parsed .= $tag;
}
else {
$parsed .= $tag;
}
} while ($depth >= 0);
return array($parsed, $text);
}
protected function _hashHTMLBlocks_inHTML($text, $hash_method, $md_attr) {
#
# Parse HTML, calling _HashHTMLBlocks_InMarkdown for block tags.
#
# * Calls $hash_method to convert any blocks.
# * Stops when the first opening tag closes.
# * $md_attr indicate if the use of the `markdown="1"` attribute is allowed.
# (it is not inside clean tags)
#
# Returns an array of that form: ( processed text , remaining text )
#
if ($text === '') return array('', '');
# Regex to match `markdown` attribute inside of a tag.
$markdown_attr_re = '
{
\s* # Eat whitespace before the `markdown` attribute
markdown
\s*=\s*
(?>
(["\']) # $1: quote delimiter
(.*?) # $2: attribute value
\1 # matching delimiter
|
([^\s>]*) # $3: unquoted attribute value
)
() # $4: make $3 always defined (avoid warnings)
}xs';
# Regex to match any tag.
$tag_re = '{
( # $2: Capture whole tag.
</? # Any opening or closing tag.
[\w:$]+ # Tag name.
(?:
(?=[\s"\'/a-zA-Z0-9]) # Allowed characters after tag name.
(?>
".*?" | # Double quotes (can contain `>`)
\'.*?\' | # Single quotes (can contain `>`)
.+? # Anything but quotes and `>`.
)*?
)?
> # End of tag.
|
<!-- .*? --> # HTML Comment
|
<\?.*?\?> | <%.*?%> # Processing instruction
|
<!\[CDATA\[.*?\]\]> # CData Block
)
}xs';
$original_text = $text; # Save original text in case of faliure.
$depth = 0; # Current depth inside the tag tree.
$block_text = ""; # Temporary text holder for current text.
$parsed = ""; # Parsed text that will be returned.
#
# Get the name of the starting tag.
# (This pattern makes $base_tag_name_re safe without quoting.)
#
if (preg_match('/^<([\w:$]*)\b/', $text, $matches))
$base_tag_name_re = $matches[1];
#
# Loop through every tag until we find the corresponding closing tag.
#
do {
#
# Split the text using the first $tag_match pattern found.
# Text before pattern will be first in the array, text after
# pattern will be at the end, and between will be any catches made
# by the pattern.
#
$parts = preg_split($tag_re, $text, 2, PREG_SPLIT_DELIM_CAPTURE);
if (count($parts) < 3) {
#
# End of $text reached with unbalenced tag(s).
# In that case, we return original text unchanged and pass the
# first character as filtered to prevent an infinite loop in the
# parent function.
#
return array($original_text{0}, substr($original_text, 1));
}
$block_text .= $parts[0]; # Text before current tag.
$tag = $parts[1]; # Tag to handle.
$text = $parts[2]; # Remaining text after current tag.
#
# Check for: Auto-close tag (like <hr/>)
# Comments and Processing Instructions.
#
if (preg_match('{^</?(?:'.$this->auto_close_tags_re.')\b}', $tag) ||
$tag{1} == '!' || $tag{1} == '?')
{
# Just add the tag to the block as if it was text.
$block_text .= $tag;
}
else {
#
# Increase/decrease nested tag count. Only do so if
# the tag's name match base tag's.
#
if (preg_match('{^</?'.$base_tag_name_re.'\b}', $tag)) {
if ($tag{1} == '/') $depth--;
else if ($tag{strlen($tag)-2} != '/') $depth++;
}
#
# Check for `markdown="1"` attribute and handle it.
#
if ($md_attr &&
preg_match($markdown_attr_re, $tag, $attr_m) &&
preg_match('/^1|block|span$/', $attr_m[2] . $attr_m[3]))
{
# Remove `markdown` attribute from opening tag.
$tag = preg_replace($markdown_attr_re, '', $tag);
# Check if text inside this tag must be parsed in span mode.
$this->mode = $attr_m[2] . $attr_m[3];
$span_mode = $this->mode == 'span' || $this->mode != 'block' &&
preg_match('{^<(?:'.$this->contain_span_tags_re.')\b}', $tag);
# Calculate indent before tag.
if (preg_match('/(?:^|\n)( *?)(?! ).*?$/', $block_text, $matches)) {
$strlen = $this->utf8_strlen;
$indent = $strlen($matches[1], 'UTF-8');
} else {
$indent = 0;
}
# End preceding block with this tag.
$block_text .= $tag;
$parsed .= $this->$hash_method($block_text);
# Get enclosing tag name for the ParseMarkdown function.
# (This pattern makes $tag_name_re safe without quoting.)
preg_match('/^<([\w:$]*)\b/', $tag, $matches);
$tag_name_re = $matches[1];
# Parse the content using the HTML-in-Markdown parser.
list ($block_text, $text)
= $this->_hashHTMLBlocks_inMarkdown($text, $indent,
$tag_name_re, $span_mode);
# Outdent markdown text.
if ($indent > 0) {
$block_text = preg_replace("/^[ ]{1,$indent}/m", "",
$block_text);
}
# Append tag content to parsed text.
if (!$span_mode) $parsed .= "\n\n$block_text\n\n";
else $parsed .= "$block_text";
# Start over with a new block.
$block_text = "";
}
else $block_text .= $tag;
}
} while ($depth > 0);
#
# Hash last block text that wasn't processed inside the loop.
#
$parsed .= $this->$hash_method($block_text);
return array($parsed, $text);
}
protected function hashClean($text) {
#
# Called whenever a tag must be hashed when a function inserts a "clean" tag
# in $text, it passes through this function and is automaticaly escaped,
# blocking invalid nested overlap.
#
return $this->hashPart($text, 'C');
}
protected function doAnchors($text) {
#
# Turn Markdown link shortcuts into XHTML <a> tags.
#
if ($this->in_anchor) return $text;
$this->in_anchor = true;
#
# First, handle reference-style links: [link text] [id]
#
$text = preg_replace_callback('{
( # wrap whole match in $1
\[
('.$this->nested_brackets_re.') # link text = $2
\]
[ ]? # one optional space
(?:\n[ ]*)? # one optional newline followed by spaces
\[
(.*?) # id = $3
\]
)
}xs',
array($this, '_doAnchors_reference_callback'), $text);
#
# Next, inline-style links: [link text](url "optional title")
#
$text = preg_replace_callback('{
( # wrap whole match in $1
\[
('.$this->nested_brackets_re.') # link text = $2
\]
\( # literal paren
[ \n]*
(?:
<(.+?)> # href = $3
|
('.$this->nested_url_parenthesis_re.') # href = $4
)
[ \n]*
( # $5
([\'"]) # quote char = $6
(.*?) # Title = $7
\6 # matching quote
[ \n]* # ignore any spaces/tabs between closing quote and )
)? # title is optional
\)
(?:[ ]? '.$this->id_class_attr_catch_re.' )? # $8 = id/class attributes
)
}xs',
array($this, '_doAnchors_inline_callback'), $text);
#
# Last, handle reference-style shortcuts: [link text]
# These must come last in case you've also got [link text][1]
# or [link text](/foo)
#
$text = preg_replace_callback('{
( # wrap whole match in $1
\[
([^\[\]]+) # link text = $2; can\'t contain [ or ]
\]
)
}xs',
array($this, '_doAnchors_reference_callback'), $text);
$this->in_anchor = false;
return $text;
}
protected function _doAnchors_reference_callback($matches) {
$whole_match = $matches[1];
$link_text = $matches[2];
$link_id =& $matches[3];
if ($link_id == "") {
# for shortcut links like [this][] or [this].
$link_id = $link_text;
}
# lower-case and turn embedded newlines into spaces
$link_id = strtolower($link_id);
$link_id = preg_replace('{[ ]?\n}', ' ', $link_id);
if (isset($this->urls[$link_id])) {
$url = $this->urls[$link_id];
$url = $this->encodeURLAttribute($url);
$result = "<a href=\"$url\"";
if ( isset( $this->titles[$link_id] ) ) {
$title = $this->titles[$link_id];
$title = $this->encodeAttribute($title);
$result .= " title=\"$title\"";
}
if (isset($this->ref_attr[$link_id]))
$result .= $this->ref_attr[$link_id];
$link_text = $this->runSpanGamut($link_text);
$result .= ">$link_text</a>";
$result = $this->hashPart($result);
}
else {
$result = $whole_match;
}
return $result;
}
protected function _doAnchors_inline_callback($matches) {
$whole_match = $matches[1];
$link_text = $this->runSpanGamut($matches[2]);
$url = $matches[3] == '' ? $matches[4] : $matches[3];
$title =& $matches[7];
$attr = $this->doExtraAttributes("a", $dummy =& $matches[8]);
// if the URL was of the form <s p a c e s> it got caught by the HTML
// tag parser and hashed. Need to reverse the process before using the URL.
$unhashed = $this->unhash($url);
if ($unhashed != $url)
$url = preg_replace('/^<(.*)>$/', '\1', $unhashed);
$url = $this->encodeURLAttribute($url);
$result = "<a href=\"$url\"";
if (isset($title)) {
$title = $this->encodeAttribute($title);
$result .= " title=\"$title\"";
}
$result .= $attr;
$link_text = $this->runSpanGamut($link_text);
$result .= ">$link_text</a>";
return $this->hashPart($result);
}
protected function doImages($text) {
#
# Turn Markdown image shortcuts into <img> tags.
#
#
# First, handle reference-style labeled images: ![alt text][id]
#
$text = preg_replace_callback('{
( # wrap whole match in $1
!\[
('.$this->nested_brackets_re.') # alt text = $2
\]
[ ]? # one optional space
(?:\n[ ]*)? # one optional newline followed by spaces
\[
(.*?) # id = $3
\]
)
}xs',
array($this, '_doImages_reference_callback'), $text);
#
# Next, handle inline images: ![alt text](url "optional title")
# Don't forget: encode * and _
#
$text = preg_replace_callback('{
( # wrap whole match in $1
!\[
('.$this->nested_brackets_re.') # alt text = $2
\]
\s? # One optional whitespace character
\( # literal paren
[ \n]*
(?:
<(\S*)> # src url = $3
|
('.$this->nested_url_parenthesis_re.') # src url = $4
)
[ \n]*
( # $5
([\'"]) # quote char = $6
(.*?) # title = $7
\6 # matching quote
[ \n]*
)? # title is optional
\)
(?:[ ]? '.$this->id_class_attr_catch_re.' )? # $8 = id/class attributes
)
}xs',
array($this, '_doImages_inline_callback'), $text);
return $text;
}
protected function _doImages_reference_callback($matches) {
$whole_match = $matches[1];
$alt_text = $matches[2];
$link_id = strtolower($matches[3]);
if ($link_id == "") {
$link_id = strtolower($alt_text); # for shortcut links like ![this][].
}
$alt_text = $this->encodeAttribute($alt_text);
if (isset($this->urls[$link_id])) {
$url = $this->encodeURLAttribute($this->urls[$link_id]);
$result = "<img src=\"$url\" alt=\"$alt_text\"";
if (isset($this->titles[$link_id])) {
$title = $this->titles[$link_id];
$title = $this->encodeAttribute($title);
$result .= " title=\"$title\"";
}
if (isset($this->ref_attr[$link_id]))
$result .= $this->ref_attr[$link_id];
$result .= $this->empty_element_suffix;
$result = $this->hashPart($result);
}
else {
# If there's no such link ID, leave intact:
$result = $whole_match;
}
return $result;
}
protected function _doImages_inline_callback($matches) {
$whole_match = $matches[1];
$alt_text = $matches[2];
$url = $matches[3] == '' ? $matches[4] : $matches[3];
$title =& $matches[7];
$attr = $this->doExtraAttributes("img", $dummy =& $matches[8]);
$alt_text = $this->encodeAttribute($alt_text);
$url = $this->encodeURLAttribute($url);
$result = "<img src=\"$url\" alt=\"$alt_text\"";
if (isset($title)) {
$title = $this->encodeAttribute($title);
$result .= " title=\"$title\""; # $title already quoted
}
$result .= $attr;
$result .= $this->empty_element_suffix;
return $this->hashPart($result);
}
protected function doHeaders($text) {
#
# Redefined to add id and class attribute support.
#
# Setext-style headers:
# Header 1 {#header1}
# ========
#
# Header 2 {#header2 .class1 .class2}
# --------
#
$text = preg_replace_callback(
'{
(^.+?) # $1: Header text
(?:[ ]+ '.$this->id_class_attr_catch_re.' )? # $3 = id/class attributes
[ ]*\n(=+|-+)[ ]*\n+ # $3: Header footer
}mx',
array($this, '_doHeaders_callback_setext'), $text);
# atx-style headers:
# # Header 1 {#header1}
# ## Header 2 {#header2}
# ## Header 2 with closing hashes ## {#header3.class1.class2}
# ...
# ###### Header 6 {.class2}
#
$text = preg_replace_callback('{
^(\#{1,6}) # $1 = string of #\'s
[ ]*
(.+?) # $2 = Header text
[ ]*
\#* # optional closing #\'s (not counted)
(?:[ ]+ '.$this->id_class_attr_catch_re.' )? # $3 = id/class attributes
[ ]*
\n+
}xm',
array($this, '_doHeaders_callback_atx'), $text);
return $text;
}
protected function _doHeaders_callback_setext($matches) {
if ($matches[3] == '-' && preg_match('{^- }', $matches[1]))
return $matches[0];
$level = $matches[3]{0} == '=' ? 1 : 2;
$attr = $this->doExtraAttributes("h$level", $dummy =& $matches[2]);
$block = "<h$level$attr>".$this->runSpanGamut($matches[1])."</h$level>";
return "\n" . $this->hashBlock($block) . "\n\n";
}
protected function _doHeaders_callback_atx($matches) {
$level = strlen($matches[1]);
$attr = $this->doExtraAttributes("h$level", $dummy =& $matches[3]);
$block = "<h$level$attr>".$this->runSpanGamut($matches[2])."</h$level>";
return "\n" . $this->hashBlock($block) . "\n\n";
}
protected function doTables($text) {
#
# Form HTML tables.
#
$less_than_tab = $this->tab_width - 1;
#
# Find tables with leading pipe.
#
# | Header 1 | Header 2
# | -------- | --------
# | Cell 1 | Cell 2
# | Cell 3 | Cell 4
#
$text = preg_replace_callback('
{
^ # Start of a line
[ ]{0,'.$less_than_tab.'} # Allowed whitespace.
[|] # Optional leading pipe (present)
(.+) \n # $1: Header row (at least one pipe)
[ ]{0,'.$less_than_tab.'} # Allowed whitespace.
[|] ([ ]*[-:]+[-| :]*) \n # $2: Header underline
( # $3: Cells
(?>
[ ]* # Allowed whitespace.
[|] .* \n # Row content.
)*
)
(?=\n|\Z) # Stop at final double newline.
}xm',
array($this, '_doTable_leadingPipe_callback'), $text);
#
# Find tables without leading pipe.
#
# Header 1 | Header 2
# -------- | --------
# Cell 1 | Cell 2
# Cell 3 | Cell 4
#
$text = preg_replace_callback('
{
^ # Start of a line
[ ]{0,'.$less_than_tab.'} # Allowed whitespace.
(\S.*[|].*) \n # $1: Header row (at least one pipe)
[ ]{0,'.$less_than_tab.'} # Allowed whitespace.
([-:]+[ ]*[|][-| :]*) \n # $2: Header underline
( # $3: Cells
(?>
.* [|] .* \n # Row content
)*
)
(?=\n|\Z) # Stop at final double newline.
}xm',
array($this, '_DoTable_callback'), $text);
return $text;
}
protected function _doTable_leadingPipe_callback($matches) {
$head = $matches[1];
$underline = $matches[2];
$content = $matches[3];
# Remove leading pipe for each row.
$content = preg_replace('/^ *[|]/m', '', $content);
return $this->_doTable_callback(array($matches[0], $head, $underline, $content));
}
protected function _doTable_makeAlignAttr($alignname)
{
if (empty($this->table_align_class_tmpl))
return " align=\"$alignname\"";
$classname = str_replace('%%', $alignname, $this->table_align_class_tmpl);
return " class=\"$classname\"";
}
protected function _doTable_callback($matches) {
$head = $matches[1];
$underline = $matches[2];
$content = $matches[3];
# Remove any tailing pipes for each line.
$head = preg_replace('/[|] *$/m', '', $head);
$underline = preg_replace('/[|] *$/m', '', $underline);
$content = preg_replace('/[|] *$/m', '', $content);
# Reading alignement from header underline.
$separators = preg_split('/ *[|] */', $underline);
foreach ($separators as $n => $s) {
if (preg_match('/^ *-+: *$/', $s))
$attr[$n] = $this->_doTable_makeAlignAttr('right');
else if (preg_match('/^ *:-+: *$/', $s))
$attr[$n] = $this->_doTable_makeAlignAttr('center');
else if (preg_match('/^ *:-+ *$/', $s))
$attr[$n] = $this->_doTable_makeAlignAttr('left');
else
$attr[$n] = '';
}
# Parsing span elements, including code spans, character escapes,
# and inline HTML tags, so that pipes inside those gets ignored.
$head = $this->parseSpan($head);
$headers = preg_split('/ *[|] */', $head);
$col_count = count($headers);
$attr = array_pad($attr, $col_count, '');
# Write column headers.
$text = "<table>\n";
$text .= "<thead>\n";
$text .= "<tr>\n";
foreach ($headers as $n => $header)
$text .= " <th$attr[$n]>".$this->runSpanGamut(trim($header))."</th>\n";
$text .= "</tr>\n";
$text .= "</thead>\n";
# Split content by row.
$rows = explode("\n", trim($content, "\n"));
$text .= "<tbody>\n";
foreach ($rows as $row) {
# Parsing span elements, including code spans, character escapes,
# and inline HTML tags, so that pipes inside those gets ignored.
$row = $this->parseSpan($row);
# Split row by cell.
$row_cells = preg_split('/ *[|] */', $row, $col_count);
$row_cells = array_pad($row_cells, $col_count, '');
$text .= "<tr>\n";
foreach ($row_cells as $n => $cell)
$text .= " <td$attr[$n]>".$this->runSpanGamut(trim($cell))."</td>\n";
$text .= "</tr>\n";
}
$text .= "</tbody>\n";
$text .= "</table>";
return $this->hashBlock($text) . "\n";
}
protected function doDefLists($text) {
#
# Form HTML definition lists.
#
$less_than_tab = $this->tab_width - 1;
# Re-usable pattern to match any entire dl list:
$whole_list_re = '(?>
( # $1 = whole list
( # $2
[ ]{0,'.$less_than_tab.'}
((?>.*\S.*\n)+) # $3 = defined term
\n?
[ ]{0,'.$less_than_tab.'}:[ ]+ # colon starting definition
)
(?s:.+?)
( # $4
\z
|
\n{2,}
(?=\S)
(?! # Negative lookahead for another term
[ ]{0,'.$less_than_tab.'}
(?: \S.*\n )+? # defined term
\n?
[ ]{0,'.$less_than_tab.'}:[ ]+ # colon starting definition
)
(?! # Negative lookahead for another definition
[ ]{0,'.$less_than_tab.'}:[ ]+ # colon starting definition
)
)
)
)'; // mx
$text = preg_replace_callback('{
(?>\A\n?|(?<=\n\n))
'.$whole_list_re.'
}mx',
array($this, '_doDefLists_callback'), $text);
return $text;
}
protected function _doDefLists_callback($matches) {
# Re-usable patterns to match list item bullets and number markers:
$list = $matches[1];
# Turn double returns into triple returns, so that we can make a
# paragraph for the last item in a list, if necessary:
$result = trim($this->processDefListItems($list));
$result = "<dl>\n" . $result . "\n</dl>";
return $this->hashBlock($result) . "\n\n";
}
protected function processDefListItems($list_str) {
#
# Process the contents of a single definition list, splitting it
# into individual term and definition list items.
#
$less_than_tab = $this->tab_width - 1;
# trim trailing blank lines:
$list_str = preg_replace("/\n{2,}\\z/", "\n", $list_str);
# Process definition terms.
$list_str = preg_replace_callback('{
(?>\A\n?|\n\n+) # leading line
( # definition terms = $1
[ ]{0,'.$less_than_tab.'} # leading whitespace
(?!\:[ ]|[ ]) # negative lookahead for a definition
# mark (colon) or more whitespace.
(?> \S.* \n)+? # actual term (not whitespace).
)
(?=\n?[ ]{0,3}:[ ]) # lookahead for following line feed
# with a definition mark.
}xm',
array($this, '_processDefListItems_callback_dt'), $list_str);
# Process actual definitions.
$list_str = preg_replace_callback('{
\n(\n+)? # leading line = $1
( # marker space = $2
[ ]{0,'.$less_than_tab.'} # whitespace before colon
\:[ ]+ # definition mark (colon)
)
((?s:.+?)) # definition text = $3
(?= \n+ # stop at next definition mark,
(?: # next term or end of text
[ ]{0,'.$less_than_tab.'} \:[ ] |
<dt> | \z
)
)
}xm',
array($this, '_processDefListItems_callback_dd'), $list_str);
return $list_str;
}
protected function _processDefListItems_callback_dt($matches) {
$terms = explode("\n", trim($matches[1]));
$text = '';
foreach ($terms as $term) {
$term = $this->runSpanGamut(trim($term));
$text .= "\n<dt>" . $term . "</dt>";
}
return $text . "\n";
}
protected function _processDefListItems_callback_dd($matches) {
$leading_line = $matches[1];
$marker_space = $matches[2];
$def = $matches[3];
if ($leading_line || preg_match('/\n{2,}/', $def)) {
# Replace marker with the appropriate whitespace indentation
$def = str_repeat(' ', strlen($marker_space)) . $def;
$def = $this->runBlockGamut($this->outdent($def . "\n\n"));
$def = "\n". $def ."\n";
}
else {
$def = rtrim($def);
$def = $this->runSpanGamut($this->outdent($def));
}
return "\n<dd>" . $def . "</dd>\n";
}
protected function doFencedCodeBlocks($text) {
#
# Adding the fenced code block syntax to regular Markdown:
#
# ~~~
# Code block
# ~~~
#
$less_than_tab = $this->tab_width;
$text = preg_replace_callback('{
(?:\n|\A)
# 1: Opening marker
(
(?:~{3,}|`{3,}) # 3 or more tildes/backticks.
)
[ ]*
(?:
\.?([-_:a-zA-Z0-9]+) # 2: standalone class name
|
'.$this->id_class_attr_catch_re.' # 3: Extra attributes
)?
[ ]* \n # Whitespace and newline following marker.
# 4: Content
(
(?>
(?!\1 [ ]* \n) # Not a closing marker.
.*\n+
)+
)
# Closing marker.
\1 [ ]* (?= \n )
}xm',
array($this, '_doFencedCodeBlocks_callback'), $text);
return $text;
}
protected function _doFencedCodeBlocks_callback($matches) {
$classname =& $matches[2];
$attrs =& $matches[3];
$codeblock = $matches[4];
$codeblock = htmlspecialchars($codeblock, ENT_NOQUOTES);
$codeblock = preg_replace_callback('/^\n+/',
array($this, '_doFencedCodeBlocks_newlines'), $codeblock);
if ($classname != "") {
if ($classname{0} == '.')
$classname = substr($classname, 1);
$attr_str = ' class="'.$this->code_class_prefix.$classname.'"';
} else {
$attr_str = $this->doExtraAttributes($this->code_attr_on_pre ? "pre" : "code", $attrs);
}
$pre_attr_str = $this->code_attr_on_pre ? $attr_str : '';
$code_attr_str = $this->code_attr_on_pre ? '' : $attr_str;
$codeblock = "<pre$pre_attr_str><code$code_attr_str>$codeblock</code></pre>";
return "\n\n".$this->hashBlock($codeblock)."\n\n";
}
protected function _doFencedCodeBlocks_newlines($matches) {
return str_repeat("<br$this->empty_element_suffix",
strlen($matches[0]));
}
#
# Redefining emphasis markers so that emphasis by underscore does not
# work in the middle of a word.
#
protected $em_relist = array(
'' => '(?:(?<!\*)\*(?!\*)|(?<![a-zA-Z0-9_])_(?!_))(?![\.,:;]?\s)',
'*' => '(?<![\s*])\*(?!\*)',
'_' => '(?<![\s_])_(?![a-zA-Z0-9_])',
);
protected $strong_relist = array(
'' => '(?:(?<!\*)\*\*(?!\*)|(?<![a-zA-Z0-9_])__(?!_))(?![\.,:;]?\s)',
'**' => '(?<![\s*])\*\*(?!\*)',
'__' => '(?<![\s_])__(?![a-zA-Z0-9_])',
);
protected $em_strong_relist = array(
'' => '(?:(?<!\*)\*\*\*(?!\*)|(?<![a-zA-Z0-9_])___(?!_))(?![\.,:;]?\s)',
'***' => '(?<![\s*])\*\*\*(?!\*)',
'___' => '(?<![\s_])___(?![a-zA-Z0-9_])',
);
protected function formParagraphs($text) {
#
# Params:
# $text - string to process with html <p> tags
#
# Strip leading and trailing lines:
$text = preg_replace('/\A\n+|\n+\z/', '', $text);
$grafs = preg_split('/\n{2,}/', $text, -1, PREG_SPLIT_NO_EMPTY);
#
# Wrap <p> tags and unhashify HTML blocks
#
foreach ($grafs as $key => $value) {
$value = trim($this->runSpanGamut($value));
# Check if this should be enclosed in a paragraph.
# Clean tag hashes & block tag hashes are left alone.
$is_p = !preg_match('/^B\x1A[0-9]+B|^C\x1A[0-9]+C$/', $value);
if ($is_p) {
$value = "<p>$value</p>";
}
$grafs[$key] = $value;
}
# Join grafs in one text, then unhash HTML tags.
$text = implode("\n\n", $grafs);
# Finish by removing any tag hashes still present in $text.
$text = $this->unhash($text);
return $text;
}
### Footnotes
protected function stripFootnotes($text) {
#
# Strips link definitions from text, stores the URLs and titles in
# hash references.
#
$less_than_tab = $this->tab_width - 1;
# Link defs are in the form: [^id]: url "optional title"
$text = preg_replace_callback('{
^[ ]{0,'.$less_than_tab.'}\[\^(.+?)\][ ]?: # note_id = $1
[ ]*
\n? # maybe *one* newline
( # text = $2 (no blank lines allowed)
(?:
.+ # actual text
|
\n # newlines but
(?!\[.+?\][ ]?:\s)# negative lookahead for footnote or link definition marker.
(?!\n+[ ]{0,3}\S)# ensure line is not blank and followed
# by non-indented content
)*
)
}xm',
array($this, '_stripFootnotes_callback'),
$text);
return $text;
}
protected function _stripFootnotes_callback($matches) {
$note_id = $this->fn_id_prefix . $matches[1];
$this->footnotes[$note_id] = $this->outdent($matches[2]);
return ''; # String that will replace the block
}
protected function doFootnotes($text) {
#
# Replace footnote references in $text [^id] with a special text-token
# which will be replaced by the actual footnote marker in appendFootnotes.
#
if (!$this->in_anchor) {
$text = preg_replace('{\[\^(.+?)\]}', "F\x1Afn:\\1\x1A:", $text);
}
return $text;
}
protected function appendFootnotes($text) {
#
# Append footnote list to text.
#
$text = preg_replace_callback('{F\x1Afn:(.*?)\x1A:}',
array($this, '_appendFootnotes_callback'), $text);
if (!empty($this->footnotes_ordered)) {
$text .= "\n\n";
$text .= "<div class=\"footnotes\">\n";
$text .= "<hr". $this->empty_element_suffix ."\n";
$text .= "<ol>\n\n";
$attr = "";
if ($this->fn_backlink_class != "") {
$class = $this->fn_backlink_class;
$class = $this->encodeAttribute($class);
$attr .= " class=\"$class\"";
}
if ($this->fn_backlink_title != "") {
$title = $this->fn_backlink_title;
$title = $this->encodeAttribute($title);
$attr .= " title=\"$title\"";
}
$num = 0;
while (!empty($this->footnotes_ordered)) {
$footnote = reset($this->footnotes_ordered);
$note_id = key($this->footnotes_ordered);
unset($this->footnotes_ordered[$note_id]);
$ref_count = $this->footnotes_ref_count[$note_id];
unset($this->footnotes_ref_count[$note_id]);
unset($this->footnotes[$note_id]);
$footnote .= "\n"; # Need to append newline before parsing.
$footnote = $this->runBlockGamut("$footnote\n");
$footnote = preg_replace_callback('{F\x1Afn:(.*?)\x1A:}',
array($this, '_appendFootnotes_callback'), $footnote);
$attr = str_replace("%%", ++$num, $attr);
$note_id = $this->encodeAttribute($note_id);
# Prepare backlink, multiple backlinks if multiple references
$backlink = "<a href=\"#fnref:$note_id\"$attr>&#8617;</a>";
for ($ref_num = 2; $ref_num <= $ref_count; ++$ref_num) {
$backlink .= " <a href=\"#fnref$ref_num:$note_id\"$attr>&#8617;</a>";
}
# Add backlink to last paragraph; create new paragraph if needed.
if (preg_match('{</p>$}', $footnote)) {
$footnote = substr($footnote, 0, -4) . "&#160;$backlink</p>";
} else {
$footnote .= "\n\n<p>$backlink</p>";
}
$text .= "<li id=\"fn:$note_id\">\n";
$text .= $footnote . "\n";
$text .= "</li>\n\n";
}
$text .= "</ol>\n";
$text .= "</div>";
}
return $text;
}
protected function _appendFootnotes_callback($matches) {
$node_id = $this->fn_id_prefix . $matches[1];
# Create footnote marker only if it has a corresponding footnote *and*
# the footnote hasn't been used by another marker.
if (isset($this->footnotes[$node_id])) {
$num =& $this->footnotes_numbers[$node_id];
if (!isset($num)) {
# Transfer footnote content to the ordered list and give it its
# number
$this->footnotes_ordered[$node_id] = $this->footnotes[$node_id];
$this->footnotes_ref_count[$node_id] = 1;
$num = $this->footnote_counter++;
$ref_count_mark = '';
} else {
$ref_count_mark = $this->footnotes_ref_count[$node_id] += 1;
}
$attr = "";
if ($this->fn_link_class != "") {
$class = $this->fn_link_class;
$class = $this->encodeAttribute($class);
$attr .= " class=\"$class\"";
}
if ($this->fn_link_title != "") {
$title = $this->fn_link_title;
$title = $this->encodeAttribute($title);
$attr .= " title=\"$title\"";
}
$attr = str_replace("%%", $num, $attr);
$node_id = $this->encodeAttribute($node_id);
return
"<sup id=\"fnref$ref_count_mark:$node_id\">".
"<a href=\"#fn:$node_id\"$attr>$num</a>".
"</sup>";
}
return "[^".$matches[1]."]";
}
### Abbreviations ###
protected function stripAbbreviations($text) {
#
# Strips abbreviations from text, stores titles in hash references.
#
$less_than_tab = $this->tab_width - 1;
# Link defs are in the form: [id]*: url "optional title"
$text = preg_replace_callback('{
^[ ]{0,'.$less_than_tab.'}\*\[(.+?)\][ ]?: # abbr_id = $1
(.*) # text = $2 (no blank lines allowed)
}xm',
array($this, '_stripAbbreviations_callback'),
$text);
return $text;
}
protected function _stripAbbreviations_callback($matches) {
$abbr_word = $matches[1];
$abbr_desc = $matches[2];
if ($this->abbr_word_re)
$this->abbr_word_re .= '|';
$this->abbr_word_re .= preg_quote($abbr_word);
$this->abbr_desciptions[$abbr_word] = trim($abbr_desc);
return ''; # String that will replace the block
}
protected function doAbbreviations($text) {
#
# Find defined abbreviations in text and wrap them in <abbr> elements.
#
if ($this->abbr_word_re) {
// cannot use the /x modifier because abbr_word_re may
// contain significant spaces:
$text = preg_replace_callback('{'.
'(?<![\w\x1A])'.
'(?:'.$this->abbr_word_re.')'.
'(?![\w\x1A])'.
'}',
array($this, '_doAbbreviations_callback'), $text);
}
return $text;
}
protected function _doAbbreviations_callback($matches) {
$abbr = $matches[0];
if (isset($this->abbr_desciptions[$abbr])) {
$desc = $this->abbr_desciptions[$abbr];
if (empty($desc)) {
return $this->hashPart("<abbr>$abbr</abbr>");
} else {
$desc = $this->encodeAttribute($desc);
return $this->hashPart("<abbr title=\"$desc\">$abbr</abbr>");
}
} else {
return $matches[0];
}
}
}

10
library/php-markdown/Michelf/MarkdownExtra.inc.php
View file

@ -1,10 +1,10 @@
<?php
# Use this file if you cannot use class autoloading. It will include all the
# files needed for the MarkdownExtra parser.
#
# Take a look at the PSR-0-compatible class autoloading implementation
# in the Readme.php file if you want a simple autoloader setup.
// Use this file if you cannot use class autoloading. It will include all the
// files needed for the MarkdownExtra parser.
//
// Take a look at the PSR-0-compatible class autoloading implementation
// in the Readme.php file if you want a simple autoloader setup.
require_once dirname(__FILE__) . '/MarkdownInterface.php';
require_once dirname(__FILE__) . '/Markdown.php';

1803
library/php-markdown/Michelf/MarkdownExtra.php
View file

@ -1,38 +1,1785 @@
<?php
#
# Markdown Extra - A text-to-HTML conversion tool for web writers
#
# PHP Markdown Extra
# Copyright (c) 2004-2014 Michel Fortin
# <http://michelf.com/projects/php-markdown/>
#
# Original Markdown
# Copyright (c) 2004-2006 John Gruber
# <http://daringfireball.net/projects/markdown/>
#
/**
* Markdown Extra - A text-to-HTML conversion tool for web writers
*
* @package php-markdown
* @author Michel Fortin <michel.fortin@michelf.com>
* @copyright 2004-2016 Michel Fortin <https://michelf.com/projects/php-markdown/>
* @copyright (Original Markdown) 2004-2006 John Gruber <https://daringfireball.net/projects/markdown/>
*/
namespace Michelf;
/**
* Markdown Extra Parser Class
*/
class MarkdownExtra extends \Michelf\Markdown {
/**
* Configuration variables
*/
# Just force Michelf/Markdown.php to load. This is needed to load
# the temporary implementation class. See below for details.
\Michelf\Markdown::MARKDOWNLIB_VERSION;
/**
* 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";
#
# Markdown Extra Parser Class
#
# Note: Currently the implementation resides in the temporary class
# \Michelf\MarkdownExtra_TmpImpl (in the same file as \Michelf\Markdown).
# This makes it easier to propagate the changes between the three different
# packaging styles of PHP Markdown. Once this issue is resolved, the
# _MarkdownExtra_TmpImpl will disappear and this one will contain the code.
#
/**
* 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 = '&#8617;&#xFE0E;';
class MarkdownExtra extends \Michelf\_MarkdownExtra_TmpImpl {
/**
* 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 = '';
### Parser Implementation ###
/**
* Optional class prefix for fenced code block.
* @var string
*/
public $code_class_prefix = "";
# Temporarily, the implemenation is in the _MarkdownExtra_TmpImpl class.
# See note above.
/**
* 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 <p>s around
* "paragraphs" that are wrapped in non-block-level tags, such as anchors,
* phrase emphasis, and spans. The list of tags we're looking for is
* hard-coded.
*
* This works by calling _HashHTMLBlocks_InMarkdown, which then calls
* _HashHTMLBlocks_InHTML when it encounter block tags. When the markdown="1"
* attribute is found within a tag, _HashHTMLBlocks_InHTML calls back
* _HashHTMLBlocks_InMarkdown to handle the Markdown syntax within the tag.
* These two functions are calling each other. It's recursive!
* @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:
*
* <div>
* <div markdown="1">
* Hello World. <-- Is this a Markdown code block or text?
* </div> <-- Is this a Markdown code block or a real tag?
* <div>
*
* If you don't like this, just don't indent the tag on which
* you apply the markdown="1" attribute.
*
* * If $enclosing_tag_re is not empty, stops at the first unmatched closing
* tag with that name. Nested tags supported.
*
* * If $span is true, text inside must treated as span. So any double
* newline will be replaced by a single newline so that it does not create
* paragraphs.
*
* Returns an array of that form: ( processed text , remaining text )
*
* @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.
</? # Any opening or closing tag.
(?> # Tag name.
' . $this->block_tags_re . ' |
' . $this->context_block_tags_re . ' |
' . $this->clean_tags_re . ' |
(?!\s)'.$enclosing_tag_re . '
)
(?:
(?=[\s"\'/a-zA-Z0-9]) # Allowed characters after tag name.
(?>
".*?" | # Double quotes (can contain `>`)
\'.*?\' | # Single quotes (can contain `>`)
.+? # Anything but quotes and `>`.
)*?
)?
> # End of tag.
|
<!-- .*? --> # HTML Comment
|
<\?.*?\?> | <%.*?%> # Processing instruction
|
<!\[CDATA\[.*?\]\]> # CData Block
' . ( !$span ? ' # If not in span.
|
# Indented code block
(?: ^[ ]*\n | ^ | \n[ ]*\n )
[ ]{' . ($indent + 4) . '}[^\n]* \n
(?>
(?: [ ]{' . ($indent + 4) . '}[^\n]* | [ ]* ) \n
)*
|
# Fenced code block marker
(?<= ^ | \n )
[ ]{0,' . ($indent + 3) . '}(?:~{3,}|`{3,})
[ ]*
(?: \.?[-_:a-zA-Z0-9]+ )? # standalone class name
[ ]*
(?: ' . $this->id_class_attr_nocatch_re . ' )? # extra attributes
[ ]*
(?= \n )
' : '' ) . ' # End (if not is span).
|
# Code span marker
# Note, this regex needs to go after backtick fenced
# code blocks but it should also be kept outside of the
# "if not in span" condition adding backticks to the parser
`+
)
}xs';
$depth = 0; // Current depth inside the tag tree.
$parsed = ""; // Parsed text that will be returned.
// Loop through every tag until we find the closing tag of the parent
// or loop until reaching the end of text if no parent tag specified.
do {
// Split the text using the first $tag_match pattern found.
// Text before pattern will be first in the array, text after
// pattern will be at the end, and between will be any catches made
// by the pattern.
$parts = preg_split($block_tag_re, $text, 2,
PREG_SPLIT_DELIM_CAPTURE);
// If in Markdown span mode, add a empty-string span-level hash
// after each newline to prevent triggering any block element.
if ($span) {
$void = $this->hashPart("", ':');
$newline = "\n$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))*?(?<!`)' . $tag_re . '(?!`)}',
$text, $matches))
{
// End marker found: pass text unchanged until marker.
$parsed .= $tag . $matches[0];
$text = substr($text, strlen($matches[0]));
}
else {
// Unmatched marker: just skip it.
$parsed .= $tag;
}
}
// Check for: Opening Block level tag or
// Opening Context Block tag (like ins and del)
// used as a block tag (tag is alone on it's line).
else if (preg_match('{^<(?:' . $this->block_tags_re . ')\b}', $tag) ||
( preg_match('{^<(?:' . $this->context_block_tags_re . ')\b}', $tag) &&
preg_match($newline_before_re, $parsed) &&
preg_match($newline_after_re, $text) )
)
{
// Need to parse tag and following text using the HTML parser.
list($block_text, $text) =
$this->_hashHTMLBlocks_inHTML($tag . $text, "hashBlock", true);
// Make sure it stays outside of any paragraph by adding newlines.
$parsed .= "\n\n$block_text\n\n";
}
// Check for: Clean tag (like script, math)
// HTML Comments, processing instructions.
else if (preg_match('{^<(?:' . $this->clean_tags_re . ')\b}', $tag) ||
$tag{1} == '!' || $tag{1} == '?')
{
// Need to parse tag and following text using the HTML parser.
// (don't check for markdown attribute)
list($block_text, $text) =
$this->_hashHTMLBlocks_inHTML($tag . $text, "hashClean", false);
$parsed .= $block_text;
}
// Check for: Tag with same name as enclosing tag.
else if ($enclosing_tag_re !== '' &&
// Same name as enclosing tag.
preg_match('{^</?(?:' . $enclosing_tag_re . ')\b}', $tag))
{
// Increase/decrease nested tag count.
if ($tag{1} == '/') $depth--;
else if ($tag{strlen($tag)-2} != '/') $depth++;
if ($depth < 0) {
// Going out of parent element. Clean up and break so we
// return to the calling function.
$text = $tag . $text;
break;
}
$parsed .= $tag;
}
else {
$parsed .= $tag;
}
} while ($depth >= 0);
return array($parsed, $text);
}
/**
* 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 = '{
( # $2: Capture whole tag.
</? # Any opening or closing tag.
[\w:$]+ # Tag name.
(?:
(?=[\s"\'/a-zA-Z0-9]) # Allowed characters after tag name.
(?>
".*?" | # Double quotes (can contain `>`)
\'.*?\' | # Single quotes (can contain `>`)
.+? # Anything but quotes and `>`.
)*?
)?
> # End of tag.
|
<!-- .*? --> # HTML Comment
|
<\?.*?\?> | <%.*?%> # Processing instruction
|
<!\[CDATA\[.*?\]\]> # CData Block
)
}xs';
$original_text = $text; // Save original text in case of faliure.
$depth = 0; // Current depth inside the tag tree.
$block_text = ""; // Temporary text holder for current text.
$parsed = ""; // Parsed text that will be returned.
// Get the name of the starting tag.
// (This pattern makes $base_tag_name_re safe without quoting.)
if (preg_match('/^<([\w:$]*)\b/', $text, $matches))
$base_tag_name_re = $matches[1];
// Loop through every tag until we find the corresponding closing tag.
do {
// Split the text using the first $tag_match pattern found.
// Text before pattern will be first in the array, text after
// pattern will be at the end, and between will be any catches made
// by the pattern.
$parts = preg_split($tag_re, $text, 2, PREG_SPLIT_DELIM_CAPTURE);
if (count($parts) < 3) {
// End of $text reached with unbalenced tag(s).
// In that case, we return original text unchanged and pass the
// first character as filtered to prevent an infinite loop in the
// parent function.
return array($original_text{0}, substr($original_text, 1));
}
$block_text .= $parts[0]; // Text before current tag.
$tag = $parts[1]; // Tag to handle.
$text = $parts[2]; // Remaining text after current tag.
// Check for: Auto-close tag (like <hr/>)
// Comments and Processing Instructions.
if (preg_match('{^</?(?:' . $this->auto_close_tags_re . ')\b}', $tag) ||
$tag{1} == '!' || $tag{1} == '?')
{
// Just add the tag to the block as if it was text.
$block_text .= $tag;
}
else {
// Increase/decrease nested tag count. Only do so if
// the tag's name match base tag's.
if (preg_match('{^</?' . $base_tag_name_re . '\b}', $tag)) {
if ($tag{1} == '/') $depth--;
else if ($tag{strlen($tag)-2} != '/') $depth++;
}
// Check for `markdown="1"` attribute and handle it.
if ($md_attr &&
preg_match($markdown_attr_re, $tag, $attr_m) &&
preg_match('/^1|block|span$/', $attr_m[2] . $attr_m[3]))
{
// Remove `markdown` attribute from opening tag.
$tag = preg_replace($markdown_attr_re, '', $tag);
// Check if text inside this tag must be parsed in span mode.
$this->mode = $attr_m[2] . $attr_m[3];
$span_mode = $this->mode == 'span' || $this->mode != 'block' &&
preg_match('{^<(?:' . $this->contain_span_tags_re . ')\b}', $tag);
// Calculate indent before tag.
if (preg_match('/(?:^|\n)( *?)(?! ).*?$/', $block_text, $matches)) {
$strlen = $this->utf8_strlen;
$indent = $strlen($matches[1], 'UTF-8');
} else {
$indent = 0;
}
// End preceding block with this tag.
$block_text .= $tag;
$parsed .= $this->$hash_method($block_text);
// Get enclosing tag name for the ParseMarkdown function.
// (This pattern makes $tag_name_re safe without quoting.)
preg_match('/^<([\w:$]*)\b/', $tag, $matches);
$tag_name_re = $matches[1];
// Parse the content using the HTML-in-Markdown parser.
list ($block_text, $text)
= $this->_hashHTMLBlocks_inMarkdown($text, $indent,
$tag_name_re, $span_mode);
// Outdent markdown text.
if ($indent > 0) {
$block_text = preg_replace("/^[ ]{1,$indent}/m", "",
$block_text);
}
// Append tag content to parsed text.
if (!$span_mode) $parsed .= "\n\n$block_text\n\n";
else $parsed .= "$block_text";
// Start over with a new block.
$block_text = "";
}
else $block_text .= $tag;
}
} while ($depth > 0);
// Hash last block text that wasn't processed inside the loop.
$parsed .= $this->$hash_method($block_text);
return array($parsed, $text);
}
/**
* 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 <a> 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);
$result = "<a href=\"$url\"";
if ( isset( $this->titles[$link_id] ) ) {
$title = $this->titles[$link_id];
$title = $this->encodeAttribute($title);
$result .= " title=\"$title\"";
}
if (isset($this->ref_attr[$link_id]))
$result .= $this->ref_attr[$link_id];
$link_text = $this->runSpanGamut($link_text);
$result .= ">$link_text</a>";
$result = $this->hashPart($result);
}
else {
$result = $whole_match;
}
return $result;
}
/**
* 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 <s p a c e s> it got caught by the HTML
// tag parser and hashed. Need to reverse the process before using the URL.
$unhashed = $this->unhash($url);
if ($unhashed != $url)
$url = preg_replace('/^<(.*)>$/', '\1', $unhashed);
$url = $this->encodeURLAttribute($url);
$result = "<a href=\"$url\"";
if (isset($title)) {
$title = $this->encodeAttribute($title);
$result .= " title=\"$title\"";
}
$result .= $attr;
$link_text = $this->runSpanGamut($link_text);
$result .= ">$link_text</a>";
return $this->hashPart($result);
}
/**
* Turn Markdown image shortcuts into <img> 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: ![alt text](url "optional title")
// Don't forget: encode * and _
$text = preg_replace_callback('{
( # wrap whole match in $1
!\[
(' . $this->nested_brackets_re . ') # alt text = $2
\]
\s? # One optional whitespace character
\( # literal paren
[ \n]*
(?:
<(\S*)> # src url = $3
|
(' . $this->nested_url_parenthesis_re . ') # src url = $4
)
[ \n]*
( # $5
([\'"]) # quote char = $6
(.*?) # title = $7
\6 # matching quote
[ \n]*
)? # title is optional
\)
(?:[ ]? ' . $this->id_class_attr_catch_re . ' )? # $8 = id/class attributes
)
}xs',
array($this, '_doImages_inline_callback'), $text);
return $text;
}
/**
* 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]);
$result = "<img src=\"$url\" alt=\"$alt_text\"";
if (isset($this->titles[$link_id])) {
$title = $this->titles[$link_id];
$title = $this->encodeAttribute($title);
$result .= " title=\"$title\"";
}
if (isset($this->ref_attr[$link_id]))
$result .= $this->ref_attr[$link_id];
$result .= $this->empty_element_suffix;
$result = $this->hashPart($result);
}
else {
// If there's no such link ID, leave intact:
$result = $whole_match;
}
return $result;
}
/**
* 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);
$result = "<img src=\"$url\" alt=\"$alt_text\"";
if (isset($title)) {
$title = $this->encodeAttribute($title);
$result .= " title=\"$title\""; // $title already quoted
}
$result .= $attr;
$result .= $this->empty_element_suffix;
return $this->hashPart($result);
}
/**
* 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);
$block = "<h$level$attr>" . $this->runSpanGamut($matches[1]) . "</h$level>";
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);
$block = "<h$level$attr>" . $this->runSpanGamut($matches[2]) . "</h$level>";
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 = "<table>\n";
$text .= "<thead>\n";
$text .= "<tr>\n";
foreach ($headers as $n => $header)
$text .= " <th$attr[$n]>" . $this->runSpanGamut(trim($header)) . "</th>\n";
$text .= "</tr>\n";
$text .= "</thead>\n";
// Split content by row.
$rows = explode("\n", trim($content, "\n"));
$text .= "<tbody>\n";
foreach ($rows as $row) {
// Parsing span elements, including code spans, character escapes,
// and inline HTML tags, so that pipes inside those gets ignored.
$row = $this->parseSpan($row);
// Split row by cell.
$row_cells = preg_split('/ *[|] */', $row, $col_count);
$row_cells = array_pad($row_cells, $col_count, '');
$text .= "<tr>\n";
foreach ($row_cells as $n => $cell)
$text .= " <td$attr[$n]>" . $this->runSpanGamut(trim($cell)) . "</td>\n";
$text .= "</tr>\n";
}
$text .= "</tbody>\n";
$text .= "</table>";
return $this->hashBlock($text) . "\n";
}
/**
* Form HTML definition lists.
* @param string $text
* @return string
*/
protected function doDefLists($text) {
$less_than_tab = $this->tab_width - 1;
// Re-usable pattern to match any entire dl list:
$whole_list_re = '(?>
( # $1 = whole list
( # $2
[ ]{0,' . $less_than_tab . '}
((?>.*\S.*\n)+) # $3 = defined term
\n?
[ ]{0,' . $less_than_tab . '}:[ ]+ # colon starting definition
)
(?s:.+?)
( # $4
\z
|
\n{2,}
(?=\S)
(?! # Negative lookahead for another term
[ ]{0,' . $less_than_tab . '}
(?: \S.*\n )+? # defined term
\n?
[ ]{0,' . $less_than_tab . '}:[ ]+ # colon starting definition
)
(?! # Negative lookahead for another definition
[ ]{0,' . $less_than_tab . '}:[ ]+ # colon starting definition
)
)
)
)'; // mx
$text = preg_replace_callback('{
(?>\A\n?|(?<=\n\n))
' . $whole_list_re . '
}mx',
array($this, '_doDefLists_callback'), $text);
return $text;
}
/**
* Callback for processing definition lists
* @param array $matches
* @return string
*/
protected function _doDefLists_callback($matches) {
// Re-usable patterns to match list item bullets and number markers:
$list = $matches[1];
// Turn double returns into triple returns, so that we can make a
// paragraph for the last item in a list, if necessary:
$result = trim($this->processDefListItems($list));
$result = "<dl>\n" . $result . "\n</dl>";
return $this->hashBlock($result) . "\n\n";
}
/**
* Process the contents of a single definition list, splitting it
* into individual term and definition list items.
* @param string $list_str
* @return string
*/
protected function processDefListItems($list_str) {
$less_than_tab = $this->tab_width - 1;
// Trim trailing blank lines:
$list_str = preg_replace("/\n{2,}\\z/", "\n", $list_str);
// Process definition terms.
$list_str = preg_replace_callback('{
(?>\A\n?|\n\n+) # leading line
( # definition terms = $1
[ ]{0,' . $less_than_tab . '} # leading whitespace
(?!\:[ ]|[ ]) # negative lookahead for a definition
# mark (colon) or more whitespace.
(?> \S.* \n)+? # actual term (not whitespace).
)
(?=\n?[ ]{0,3}:[ ]) # lookahead for following line feed
# with a definition mark.
}xm',
array($this, '_processDefListItems_callback_dt'), $list_str);
// Process actual definitions.
$list_str = preg_replace_callback('{
\n(\n+)? # leading line = $1
( # marker space = $2
[ ]{0,' . $less_than_tab . '} # whitespace before colon
\:[ ]+ # definition mark (colon)
)
((?s:.+?)) # definition text = $3
(?= \n+ # stop at next definition mark,
(?: # next term or end of text
[ ]{0,' . $less_than_tab . '} \:[ ] |
<dt> | \z
)
)
}xm',
array($this, '_processDefListItems_callback_dd'), $list_str);
return $list_str;
}
/**
* Callback for <dt> elements in definition lists
* @param array $matches
* @return string
*/
protected function _processDefListItems_callback_dt($matches) {
$terms = explode("\n", trim($matches[1]));
$text = '';
foreach ($terms as $term) {
$term = $this->runSpanGamut(trim($term));
$text .= "\n<dt>" . $term . "</dt>";
}
return $text . "\n";
}
/**
* Callback for <dd> elements in definition lists
* @param array $matches
* @return string
*/
protected function _processDefListItems_callback_dd($matches) {
$leading_line = $matches[1];
$marker_space = $matches[2];
$def = $matches[3];
if ($leading_line || preg_match('/\n{2,}/', $def)) {
// Replace marker with the appropriate whitespace indentation
$def = str_repeat(' ', strlen($marker_space)) . $def;
$def = $this->runBlockGamut($this->outdent($def . "\n\n"));
$def = "\n". $def ."\n";
}
else {
$def = rtrim($def);
$def = $this->runSpanGamut($this->outdent($def));
}
return "\n<dd>" . $def . "</dd>\n";
}
/**
* Adding the fenced code block syntax to regular Markdown:
*
* ~~~
* Code block
* ~~~
*
* @param string $text
* @return string
*/
protected function doFencedCodeBlocks($text) {
$less_than_tab = $this->tab_width;
$text = preg_replace_callback('{
(?:\n|\A)
# 1: Opening marker
(
(?:~{3,}|`{3,}) # 3 or more tildes/backticks.
)
[ ]*
(?:
\.?([-_:a-zA-Z0-9]+) # 2: standalone class name
)?
[ ]*
(?:
' . $this->id_class_attr_catch_re . ' # 3: Extra attributes
)?
[ ]* \n # Whitespace and newline following marker.
# 4: Content
(
(?>
(?!\1 [ ]* \n) # Not a closing marker.
.*\n+
)+
)
# Closing marker.
\1 [ ]* (?= \n )
}xm',
array($this, '_doFencedCodeBlocks_callback'), $text);
return $text;
}
/**
* Callback to process fenced code blocks
* @param array $matches
* @return string
*/
protected function _doFencedCodeBlocks_callback($matches) {
$classname =& $matches[2];
$attrs =& $matches[3];
$codeblock = $matches[4];
if ($this->code_block_content_func) {
$codeblock = call_user_func($this->code_block_content_func, $codeblock, $classname);
} else {
$codeblock = htmlspecialchars($codeblock, ENT_NOQUOTES);
}
$codeblock = preg_replace_callback('/^\n+/',
array($this, '_doFencedCodeBlocks_newlines'), $codeblock);
$classes = array();
if ($classname != "") {
if ($classname{0} == '.')
$classname = substr($classname, 1);
$classes[] = $this->code_class_prefix . $classname;
}
$attr_str = $this->doExtraAttributes($this->code_attr_on_pre ? "pre" : "code", $attrs, null, $classes);
$pre_attr_str = $this->code_attr_on_pre ? $attr_str : '';
$code_attr_str = $this->code_attr_on_pre ? '' : $attr_str;
$codeblock = "<pre$pre_attr_str><code$code_attr_str>$codeblock</code></pre>";
return "\n\n".$this->hashBlock($codeblock)."\n\n";
}
/**
* Replace new lines in fenced code blocks
* @param array $matches
* @return string
*/
protected function _doFencedCodeBlocks_newlines($matches) {
return str_repeat("<br$this->empty_element_suffix",
strlen($matches[0]));
}
/**
* Redefining emphasis markers so that emphasis by underscore does not
* work in the middle of a word.
* @var array
*/
protected $em_relist = array(
'' => '(?:(?<!\*)\*(?!\*)|(?<![a-zA-Z0-9_])_(?!_))(?![\.,:;]?\s)',
'*' => '(?<![\s*])\*(?!\*)',
'_' => '(?<![\s_])_(?![a-zA-Z0-9_])',
);
protected $strong_relist = array(
'' => '(?:(?<!\*)\*\*(?!\*)|(?<![a-zA-Z0-9_])__(?!_))(?![\.,:;]?\s)',
'**' => '(?<![\s*])\*\*(?!\*)',
'__' => '(?<![\s_])__(?![a-zA-Z0-9_])',
);
protected $em_strong_relist = array(
'' => '(?:(?<!\*)\*\*\*(?!\*)|(?<![a-zA-Z0-9_])___(?!_))(?![\.,:;]?\s)',
'***' => '(?<![\s*])\*\*\*(?!\*)',
'___' => '(?<![\s_])___(?![a-zA-Z0-9_])',
);
/**
* Parse text into paragraphs
* @param string $text String to process in paragraphs
* @param boolean $wrap_in_p Whether paragraphs should be wrapped in <p> tags
* @return string HTML output
*/
protected function formParagraphs($text, $wrap_in_p = true) {
// Strip leading and trailing lines:
$text = preg_replace('/\A\n+|\n+\z/', '', $text);
$grafs = preg_split('/\n{2,}/', $text, -1, PREG_SPLIT_NO_EMPTY);
// Wrap <p> tags and unhashify HTML blocks
foreach ($grafs as $key => $value) {
$value = trim($this->runSpanGamut($value));
// Check if this should be enclosed in a paragraph.
// Clean tag hashes & block tag hashes are left alone.
$is_p = $wrap_in_p && !preg_match('/^B\x1A[0-9]+B|^C\x1A[0-9]+C$/', $value);
if ($is_p) {
$value = "<p>$value</p>";
}
$grafs[$key] = $value;
}
// Join grafs in one text, then unhash HTML tags.
$text = implode("\n\n", $grafs);
// Finish by removing any tag hashes still present in $text.
$text = $this->unhash($text);
return $text;
}
/**
* Footnotes - 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 .= "<div class=\"footnotes\">\n";
$text .= "<hr" . $this->empty_element_suffix . "\n";
$text .= "<ol>\n\n";
$attr = "";
if ($this->fn_backlink_class != "") {
$class = $this->fn_backlink_class;
$class = $this->encodeAttribute($class);
$attr .= " class=\"$class\"";
}
if ($this->fn_backlink_title != "") {
$title = $this->fn_backlink_title;
$title = $this->encodeAttribute($title);
$attr .= " title=\"$title\"";
}
$backlink_text = $this->fn_backlink_html;
$num = 0;
while (!empty($this->footnotes_ordered)) {
$footnote = reset($this->footnotes_ordered);
$note_id = key($this->footnotes_ordered);
unset($this->footnotes_ordered[$note_id]);
$ref_count = $this->footnotes_ref_count[$note_id];
unset($this->footnotes_ref_count[$note_id]);
unset($this->footnotes[$note_id]);
$footnote .= "\n"; // Need to append newline before parsing.
$footnote = $this->runBlockGamut("$footnote\n");
$footnote = preg_replace_callback('{F\x1Afn:(.*?)\x1A:}',
array($this, '_appendFootnotes_callback'), $footnote);
$attr = str_replace("%%", ++$num, $attr);
$note_id = $this->encodeAttribute($note_id);
// Prepare backlink, multiple backlinks if multiple references
$backlink = "<a href=\"#fnref:$note_id\"$attr>$backlink_text</a>";
for ($ref_num = 2; $ref_num <= $ref_count; ++$ref_num) {
$backlink .= " <a href=\"#fnref$ref_num:$note_id\"$attr>$backlink_text</a>";
}
// Add backlink to last paragraph; create new paragraph if needed.
if (preg_match('{</p>$}', $footnote)) {
$footnote = substr($footnote, 0, -4) . "&#160;$backlink</p>";
} else {
$footnote .= "\n\n<p>$backlink</p>";
}
$text .= "<li id=\"fn:$note_id\">\n";
$text .= $footnote . "\n";
$text .= "</li>\n\n";
}
$text .= "</ol>\n";
$text .= "</div>";
}
return $text;
}
/**
* 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
"<sup id=\"fnref$ref_count_mark:$node_id\">".
"<a href=\"#fn:$node_id\"$attr>$num</a>".
"</sup>";
}
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 <abbr> 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('{' .
'(?<![\w\x1A])' .
'(?:' . $this->abbr_word_re . ')' .
'(?![\w\x1A])' .
'}',
array($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 $this->hashPart("<abbr>$abbr</abbr>");
} else {
$desc = $this->encodeAttribute($desc);
return $this->hashPart("<abbr title=\"$desc\">$abbr</abbr>");
}
} else {
return $matches[0];
}
}
}

10
library/php-markdown/Michelf/MarkdownInterface.inc.php
View file

@ -1,9 +1,9 @@
<?php
# Use this file if you cannot use class autoloading. It will include all the
# files needed for the MarkdownInterface interface.
#
# Take a look at the PSR-0-compatible class autoloading implementation
# in the Readme.php file if you want a simple autoloader setup.
// Use this file if you cannot use class autoloading. It will include all the
// files needed for the MarkdownInterface interface.
//
// Take a look at the PSR-0-compatible class autoloading implementation
// in the Readme.php file if you want a simple autoloader setup.
require_once dirname(__FILE__) . '/MarkdownInterface.php';

60
library/php-markdown/Michelf/MarkdownInterface.php
View file

@ -1,34 +1,38 @@
<?php
#
# Markdown - A text-to-HTML conversion tool for web writers
#
# PHP Markdown
# Copyright (c) 2004-2014 Michel Fortin
# <http://michelf.com/projects/php-markdown/>
#
# Original Markdown
# Copyright (c) 2004-2006 John Gruber
# <http://daringfireball.net/projects/markdown/>
#
/**
* Markdown - A text-to-HTML conversion tool for web writers
*
* @package php-markdown
* @author Michel Fortin <michel.fortin@michelf.com>
* @copyright 2004-2016 Michel Fortin <https://michelf.com/projects/php-markdown/>
* @copyright (Original Markdown) 2004-2006 John Gruber <https://daringfireball.net/projects/markdown/>
*/
namespace Michelf;
#
# Markdown Parser Interface
#
/**
* 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);
#
# Initialize the parser and return the result of its transform method.
# This will work fine for derived classes too.
#
public static function defaultTransform($text);
#
# Main function. Performs some preprocessing on the input text
# and pass it through the document gamut.
#
public function transform($text);
/**
* 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);
}

103
library/php-markdown/Readme.md
View file

@ -1,13 +1,13 @@
PHP Markdown
============
PHP Markdown Lib 1.4.1 - 4 May 2013
PHP Markdown Lib 1.7.0 - 29 Oct 2016
by Michel Fortin
<http://michelf.ca/>
<https://michelf.ca/>
based on Markdown by John Gruber
<http://daringfireball.net/>
<https://daringfireball.net/>
Introduction
@ -25,10 +25,10 @@ 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](<http://daringfireball.net/projects/markdown/>)
- Daring Fireball (John Gruber)
* [Markdown Extra syntax additions](<http://michelf.ca/projects/php-markdown/extra/>)
- Michel Fortin
* [Full documentation of the Markdown syntax](<https://daringfireball.net/projects/markdown/>)
— Daring Fireball (John Gruber)
* [Markdown Extra syntax additions](<https://michelf.ca/projects/php-markdown/extra/>)
— Michel Fortin
Requirement
@ -83,7 +83,7 @@ configuration variables:
To learn more, see the full list of [configuration variables].
[configuration variables]: http://michelf.ca/projects/php-markdown/configuration/
[configuration variables]: https://michelf.ca/projects/php-markdown/configuration/
### Usage without an autoloader
@ -149,7 +149,7 @@ Development and Testing
-----------------------
Pull requests for fixing bugs are welcome. Proposed new features are
going meticulously reviewed -- taking into account backward compatibility,
going to be meticulously reviewed -- taking into account backward compatibility,
potential side effects, and future extensibility -- before deciding on
acceptance or rejection.
@ -174,11 +174,80 @@ PHP Markdown, please visit [michelf.ca/donate] or send Bitcoin to
Version History
---------------
Unreleased
PHP Markdown Lib 1.7.0 (29 Oct 2016)
* Added the ability to insert custom HTML attributes everywhere an extra
attribute block is allowed (links, images, headers). Credits to
Peter Droogmans for providing the implementation.
* Added a `hard_wrap` configuration variable to make all newline characters
in the text become `<br>` 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 `<p markdown="1">`
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.
@ -239,7 +308,7 @@ PHP Markdown Extra 1.2.6:
* Plugin interface for WordPress and other systems is no longer present in
the Lib package. The classic package is still available if you need it:
<http://michelf.ca/projects/php-markdown/classic/>
<https://michelf.ca/projects/php-markdown/classic/>
* Added `public` and `protected` protection attributes, plus a section about
what is "public API" and what isn't in the Readme file.
@ -277,13 +346,13 @@ Copyright and License
---------------------
PHP Markdown Lib
Copyright (c) 2004-2014 Michel Fortin
<http://michelf.ca/>
Copyright (c) 2004-2016 Michel Fortin
<https://michelf.ca/>
All rights reserved.
Based on Markdown
Copyright (c) 2003-2005 John Gruber
<http://daringfireball.net/>
<https://daringfireball.net/>
All rights reserved.
Redistribution and use in source and binary forms, with or without

14
library/php-markdown/Readme.php
View file

@ -1,18 +1,18 @@
<?php
# This file passes the content of the Readme.md file in the same directory
# through the Markdown filter. You can adapt this sample code in any way
# you like.
// This file passes the content of the Readme.md file in the same directory
// through the Markdown filter. You can adapt this sample code in any way
// you like.
# Install PSR-0-compatible class autoloader
// Install PSR-0-compatible class autoloader
spl_autoload_register(function($class){
require preg_replace('{\\\\|_(?!.*\\\\)}', DIRECTORY_SEPARATOR, ltrim($class, '\\')).'.php';
});
# Get Markdown class
// Get Markdown class
use \Michelf\Markdown;
# Read file and pass content through the Markdown parser
// Read file and pass content through the Markdown parser
$text = file_get_contents('Readme.md');
$html = Markdown::defaultTransform($text);
@ -24,7 +24,7 @@ $html = Markdown::defaultTransform($text);
</head>
<body>
<?php
# Put HTML content in the document
// Put HTML content in the document
echo $html;
?>
</body>

11
library/php-markdown/composer.json
View file

@ -2,19 +2,19 @@
"name": "michelf/php-markdown",
"type": "library",
"description": "PHP Markdown",
"homepage": "http://michelf.ca/projects/php-markdown/",
"homepage": "https://michelf.ca/projects/php-markdown/",
"keywords": ["markdown"],
"license": "BSD-3-Clause",
"authors": [
{
"name": "Michel Fortin",
"email": "michel.fortin@michelf.ca",
"homepage": "http://michelf.ca/",
"homepage": "https://michelf.ca/",
"role": "Developer"
},
{
"name": "John Gruber",
"homepage": "http://daringfireball.net/"
"homepage": "https://daringfireball.net/"
}
],
"require": {
@ -22,10 +22,5 @@
},
"autoload": {
"psr-0": { "Michelf": "" }
},
"extra": {
"branch-alias": {
"dev-lib": "1.4.x-dev"
}
}
}