protected function Markdown::hashHTMLBlocks in Markdown 7

* Hashify HTML blocks *

Parameters

string $text: * @return string

2 calls to Markdown::hashHTMLBlocks()

Markdown::runBlockGamut in includes/Markdown.php

* 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…

Markdown::transform in includes/Markdown.php

* Main function. Performs some preprocessing on the input text and pass * it through the document gamut. * * @api * *

1 method overrides Markdown::hashHTMLBlocks()

MarkdownExtra::hashHTMLBlocks in includes/MarkdownExtra.php

* 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…

File

includes/Markdown.php, line 324

Class

Markdown

Markdown Parser Class

Namespace

Michelf

Code

protected function hashHTMLBlocks($text) {
  if ($this->no_markup) {
    return $text;
  }
  $less_than_tab = $this->tab_width - 1;

  /**
   * Hashify HTML blocks:
   *
   * We only want to do this for block-level HTML tags, such as headers,
   * lists, and tables. That's because we still want to wrap <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.
  $nested_tags_level = 4;
  $attr = '
			(?>				# optional tag attributes
			  \\s			# starts with whitespace
			  (?>
				[^>"/]+		# text outside quotes
			  |
				/+(?!>)		# slash not followed by ">"
			  |
				"[^"]*"		# text inside double quotes (tolerate ">")
			  |
				\'[^\']*\'	# text inside single quotes (tolerate ">")
			  )*
			)?	
			';
  $content = str_repeat('
				(?>
				  [^<]+			# content without tag
				|
				  <\\2			# nested opening tag
					' . $attr . '	# attributes
					(?>
					  />
					|
					  >', $nested_tags_level) . '.*?' . 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>`.
   */
  $text = preg_replace_callback('{(?>
			(?>
				(?<=\\n)			# Starting on its own line
				|				# or
				\\A\\n?			# the at beginning of the doc
			)
			(						# save in $1

			  # Match from `\\n<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
						' . $content . '		# content, support nesting
						</\\2>				# the matching end tag
						[ ]*				# trailing spaces/tabs
						(?=\\n+|\\Z)	# followed by a newline or end of document

			| # Special version for tags of group a.

						[ ]{0,' . $less_than_tab . '}
						<(' . $block_tags_a_re . ')# start tag = $3
						' . $attr . '>[ ]*\\n	# attributes followed by >
						' . $content2 . '		# content, support nesting
						</\\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
			  # 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
						.*?
						\\2>
					)
					[ ]*
					(?=\\n{2,}|\\Z)		# followed by a blank line or end of document
					
			)
			)}Sxmi', array(
    $this,
    '_hashHTMLBlocks_callback',
  ), $text);
  return $text;
}