forked from GNUsocial/gnu-social
1894 lines
53 KiB
PHP
1894 lines
53 KiB
PHP
<?php
|
|
/**
|
|
* Markdown Extra - A text-to-HTML conversion tool for web writers
|
|
*
|
|
* @package php-markdown
|
|
* @author Michel Fortin <michel.fortin@michelf.com>
|
|
* @copyright 2004-2019 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
|
|
*/
|
|
|
|
/**
|
|
* Prefix for footnote ids.
|
|
* @var string
|
|
*/
|
|
public $fn_id_prefix = "";
|
|
|
|
/**
|
|
* Optional title attribute for footnote links.
|
|
* @var string
|
|
*/
|
|
public $fn_link_title = "";
|
|
|
|
/**
|
|
* Optional class attribute for footnote links and backlinks.
|
|
* @var string
|
|
*/
|
|
public $fn_link_class = "footnote-ref";
|
|
public $fn_backlink_class = "footnote-backref";
|
|
|
|
/**
|
|
* Content to be displayed within footnote backlinks. The default is '↩';
|
|
* the U+FE0E on the end is a Unicode variant selector used to prevent iOS
|
|
* from displaying the arrow character as an emoji.
|
|
* Optionally use '^^' and '%%' to refer to the footnote number and
|
|
* reference number respectively. {@see parseFootnotePlaceholders()}
|
|
* @var string
|
|
*/
|
|
public $fn_backlink_html = '↩︎';
|
|
|
|
/**
|
|
* Optional title and aria-label attributes for footnote backlinks for
|
|
* added accessibility (to ensure backlink uniqueness).
|
|
* Use '^^' and '%%' to refer to the footnote number and reference number
|
|
* respectively. {@see parseFootnotePlaceholders()}
|
|
* @var string
|
|
*/
|
|
public $fn_backlink_title = "";
|
|
public $fn_backlink_label = "";
|
|
|
|
/**
|
|
* Class name for table cell alignment (%% replaced left/center/right)
|
|
* For instance: 'go-%%' becomes 'go-left' or 'go-right' or 'go-center'
|
|
* If empty, the align attribute is used instead of a class name.
|
|
* @var string
|
|
*/
|
|
public $table_align_class_tmpl = '';
|
|
|
|
/**
|
|
* Optional class prefix for fenced code block.
|
|
* @var string
|
|
*/
|
|
public $code_class_prefix = "";
|
|
|
|
/**
|
|
* Class attribute for code blocks goes on the `code` tag;
|
|
* setting this to true will put attributes on the `pre` tag instead.
|
|
* @var boolean
|
|
*/
|
|
public $code_attr_on_pre = false;
|
|
|
|
/**
|
|
* Predefined abbreviations.
|
|
* @var array
|
|
*/
|
|
public $predef_abbr = array();
|
|
|
|
/**
|
|
* Only convert atx-style headers if there's a space between the header and #
|
|
* @var boolean
|
|
*/
|
|
public $hashtag_protection = false;
|
|
|
|
/**
|
|
* Determines whether footnotes should be appended to the end of the document.
|
|
* If true, footnote html can be retrieved from $this->footnotes_assembled.
|
|
* @var boolean
|
|
*/
|
|
public $omit_footnotes = false;
|
|
|
|
|
|
/**
|
|
* After parsing, the HTML for the list of footnotes appears here.
|
|
* This is available only if $omit_footnotes == true.
|
|
*
|
|
* Note: when placing the content of `footnotes_assembled` on the page,
|
|
* consider adding the attribute `role="doc-endnotes"` to the `div` or
|
|
* `section` that will enclose the list of footnotes so they are
|
|
* reachable to accessibility tools the same way they would be with the
|
|
* default HTML output.
|
|
* @var null|string
|
|
*/
|
|
public $footnotes_assembled = null;
|
|
|
|
/**
|
|
* 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;
|
|
|
|
/**
|
|
* Ref attribute for links
|
|
* @var array
|
|
*/
|
|
protected $ref_attr = array();
|
|
|
|
/**
|
|
* 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;
|
|
$this->footnotes_assembled = null;
|
|
|
|
foreach ($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 = '';
|
|
|
|
if ( ! $this->omit_footnotes )
|
|
$this->footnotes_assembled = null;
|
|
|
|
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 === false || $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 = $parts[2]; // Remaining text after current tag.
|
|
|
|
// Check for: Fenced code block marker.
|
|
// Note: need to recheck the whole tag to disambiguate backtick
|
|
// fences from code spans
|
|
if (preg_match('{^\n?([ ]{0,' . ($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 bool $md_attr Handle `markdown="1"` attribute
|
|
* @return array
|
|
*/
|
|
protected function _hashHTMLBlocks_inHTML($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.
|
|
$base_tag_name_re = '';
|
|
|
|
// 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.
|
|
$mode = $attr_m[2] . $attr_m[3];
|
|
$span_mode = $mode === 'span' || ($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 .= (string) $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) {
|
|
$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: 
|
|
// 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) {
|
|
$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}) # $1 = string of #\'s
|
|
[ ]'.($this->hashtag_protection ? '+' : '*').'
|
|
(.+?) # $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) {
|
|
|
|
$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 ) ) {
|
|
$this->_doFootnotes();
|
|
if ( ! $this->omit_footnotes ) {
|
|
$text .= "\n\n";
|
|
$text .= "<div class=\"footnotes\" role=\"doc-endnotes\">\n";
|
|
$text .= "<hr" . $this->empty_element_suffix . "\n";
|
|
$text .= $this->footnotes_assembled;
|
|
$text .= "</div>";
|
|
}
|
|
}
|
|
return $text;
|
|
}
|
|
|
|
|
|
/**
|
|
* Generates the HTML for footnotes. Called by appendFootnotes, even if
|
|
* footnotes are not being appended.
|
|
* @return void
|
|
*/
|
|
protected function _doFootnotes() {
|
|
$attr = array();
|
|
if ($this->fn_backlink_class !== "") {
|
|
$class = $this->fn_backlink_class;
|
|
$class = $this->encodeAttribute($class);
|
|
$attr['class'] = " class=\"$class\"";
|
|
}
|
|
$attr['role'] = " role=\"doc-backlink\"";
|
|
$num = 0;
|
|
|
|
$text = "<ol>\n\n";
|
|
while (!empty($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);
|
|
|
|
$num++;
|
|
$note_id = $this->encodeAttribute($note_id);
|
|
|
|
// Prepare backlink, multiple backlinks if multiple references
|
|
// Do not create empty backlinks if the html is blank
|
|
$backlink = "";
|
|
if (!empty($this->fn_backlink_html)) {
|
|
for ($ref_num = 1; $ref_num <= $ref_count; ++$ref_num) {
|
|
if (!empty($this->fn_backlink_title)) {
|
|
$attr['title'] = ' title="' . $this->encodeAttribute($this->fn_backlink_title) . '"';
|
|
}
|
|
if (!empty($this->fn_backlink_label)) {
|
|
$attr['label'] = ' aria-label="' . $this->encodeAttribute($this->fn_backlink_label) . '"';
|
|
}
|
|
$parsed_attr = $this->parseFootnotePlaceholders(
|
|
implode('', $attr),
|
|
$num,
|
|
$ref_num
|
|
);
|
|
$backlink_text = $this->parseFootnotePlaceholders(
|
|
$this->fn_backlink_html,
|
|
$num,
|
|
$ref_num
|
|
);
|
|
$ref_count_mark = $ref_num > 1 ? $ref_num : '';
|
|
$backlink .= " <a href=\"#fnref$ref_count_mark:$note_id\"$parsed_attr>$backlink_text</a>";
|
|
}
|
|
$backlink = trim($backlink);
|
|
}
|
|
|
|
// Add backlink to last paragraph; create new paragraph if needed.
|
|
if (!empty($backlink)) {
|
|
if (preg_match('{</p>$}', $footnote)) {
|
|
$footnote = substr($footnote, 0, -4) . " $backlink</p>";
|
|
} else {
|
|
$footnote .= "\n\n<p>$backlink</p>";
|
|
}
|
|
}
|
|
|
|
$text .= "<li id=\"fn:$note_id\" role=\"doc-endnote\">\n";
|
|
$text .= $footnote . "\n";
|
|
$text .= "</li>\n\n";
|
|
}
|
|
$text .= "</ol>\n";
|
|
|
|
$this->footnotes_assembled = $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 .= " role=\"doc-noteref\"";
|
|
|
|
$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] . "]";
|
|
}
|
|
|
|
/**
|
|
* Build footnote label by evaluating any placeholders.
|
|
* - ^^ footnote number
|
|
* - %% footnote reference number (Nth reference to footnote number)
|
|
* @param string $label
|
|
* @param int $footnote_number
|
|
* @param int $reference_number
|
|
* @return string
|
|
*/
|
|
protected function parseFootnotePlaceholders($label, $footnote_number, $reference_number) {
|
|
return str_replace(
|
|
array('^^', '%%'),
|
|
array($footnote_number, $reference_number),
|
|
$label
|
|
);
|
|
}
|
|
|
|
|
|
/**
|
|
* 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>");
|
|
}
|
|
$desc = $this->encodeAttribute($desc);
|
|
return $this->hashPart("<abbr title=\"$desc\">$abbr</abbr>");
|
|
}
|
|
return $matches[0];
|
|
}
|
|
}
|