WPCom_GHF_Markdown_Parser::transform() - Code Metrics - Inspection of "Markdown: allow for an array of patterns to be ign..." - Automattic/jetpack - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — add/filter-markdown-preserve ( 71c8e0...50074b )

by Jeremy

created 2016-02-16 14:27 UTC

WPCom_GHF_Markdown_Parser::transform() C

↳ Parent: WPCom_GHF_Markdown_Parser

Complexity

Conditions	8
Paths	32

Size

Total Lines	52
Code Lines	19

Duplication

Lines	0
Ratio	0 %

Metric	Value
dl	0
loc	52
rs	6.8493
cc	8
eloc	19
nc	32
nop	1

How to fix Long Method

<?php
/**
 * GitHub-Flavoured Markdown. Inspired by Evan's plugin, but modified.
 *
 * @author Evan Solomon
 * @author Matt Wiebe <[email protected]>
 * @link https://github.com/evansolomon/wp-github-flavored-markdown-comments
 *
 * Add a few extras from GitHub's Markdown implementation. Must be used in a WordPress environment.
 */

class WPCom_GHF_Markdown_Parser extends MarkdownExtra_Parser {

	/**
	 * Hooray somewhat arbitrary numbers that are fearful of 1.0.x.
	 */
	const WPCOM_GHF_MARDOWN_VERSION = '0.9.0';

	/**
	 * Use a [code] shortcode when encountering a fenced code block
	 * @var boolean
	 */
	public $use_code_shortcode = true;

	/**
	 * Preserve shortcodes, untouched by Markdown.
	 * This requires use within a WordPress installation.
	 * @var boolean
	 */
	public $preserve_shortcodes = true;

	/**
	 * Preserve the legacy $latex your-latex-code-here$ style
	 * LaTeX markup
	 */
	public $preserve_latex = true;

	/**
	 * Preserve single-line <code> blocks.
	 * @var boolean
	 */
	public $preserve_inline_code_blocks = true;

	/**
	 * Strip paragraphs from the output. This is the right default for WordPress,
	 * which generally wants to create its own paragraphs with `wpautop`
	 * @var boolean
	 */
	public $strip_paras = true;

	// Will run through sprintf - you can supply your own syntax if you want
	public $shortcode_start = '[code lang=%s]';
	public $shortcode_end   = '[/code]';

	// Stores shortcodes we remove and then replace
	protected $preserve_text_hash = array();

	/**
	 * Set environment defaults based on presence of key functions/classes.
	 */
	public function __construct() {
		$this->use_code_shortcode  = class_exists( 'SyntaxHighlighter' );
		$this->preserve_shortcodes = function_exists( 'get_shortcode_regex' );
		$this->preserve_latex      = function_exists( 'latex_markup' );
		$this->strip_paras         = function_exists( 'wpautop' );

		parent::__construct();
	}

	/**
	 * Overload to specify heading styles only if the hash has space(s) after it. This is actually in keeping with
	 * the documentation and eases the semantic overload of the hash character.
	 * #Will Not Produce a Heading 1
	 * # This Will Produce a Heading 1
	 *
	 * @param  string $text Markdown text
	 * @return string       HTML-transformed text
	 */
	public function transform( $text ) {
		// Preserve anything inside a single-line <code> element
		if ( $this->preserve_inline_code_blocks ) {
			$text = $this->single_line_code_preserve( $text );
		}
		// Remove all shortcodes so their interiors are left intact
		if ( $this->preserve_shortcodes ) {
			$text = $this->shortcode_preserve( $text );
		}
		// Remove legacy LaTeX so it's left intact
		if ( $this->preserve_latex ) {
			$text = $this->latex_preserve( $text );
		}

		// escape line-beginning # chars that do not have a space after them.
		$text = preg_replace_callback( '|^#{1,6}( )?|um', array( $this, '_doEscapeForHashWithoutSpacing' ), $text );

		/**
		 * Allow third-party plugins to define custom patterns that won't be processed by Markdown.
		 *
		 * @module markdown
		 *
		 * @since 3.9.2
		 *
		 * @param array $custom_patterns Array of custom patterns to be ignored by Markdown.
		 */
		$custom_patterns = apply_filters( 'jetpack_markdown_preserve_pattern', array() );
		if ( is_array( $custom_patterns ) && ! empty( $custom_patterns ) ) {
			foreach ( $custom_patterns as $pattern ) {
				$text = preg_replace_callback( $pattern, array( $this, '_doRemoveText'), $text );
			}
		}

		// run through core Markdown
		$text = parent::transform( $text );

		// Occasionally Markdown Extra chokes on a para structure, producing odd paragraphs.
		$text = str_replace( "<p>&lt;</p>\n\n<p>p>", '<p>', $text );

		// put start-of-line # chars back in place
		$text = $this->restore_leading_hash( $text );

		// Strip paras if set
		if ( $this->strip_paras ) {
			$text = $this->unp( $text );
		}

		// Restore preserved things like shortcodes/LaTeX
		$text = $this->do_restore( $text );

		return $text;
	}

	/**
	 * Prevents blocks like <code>__this__</code> from turning into <code><strong>this</strong></code>
	 * @param  string $text Text that may need preserving
	 * @return string       Text that was preserved if needed
	 */
	public function single_line_code_preserve( $text ) {
		return preg_replace_callback( '|<code\b[^>]*>(.*?)</code>|', array( $this, 'do_single_line_code_preserve' ), $text );
	}

	/**
	 * Regex callback for inline code presevation
	 * @param  array $matches Regex matches
	 * @return string         Hashed content for later restoration
	 */
	public function do_single_line_code_preserve( $matches ) {
		return '<code>' . $this->hash_block( $matches[1] ) . '</code>';
	}

	/**
	 * Preserve code block contents by HTML encoding them. Useful before getting to KSES stripping.
	 * @param  string $text Markdown/HTML content
	 * @return string       Markdown/HTML content with escaped code blocks
	 */
	public function codeblock_preserve( $text ) {
		return preg_replace_callback( "/^([`~]{3})([^`\n]+)?\n([^`~]+)(\\1)/m", array( $this, 'do_codeblock_preserve' ), $text );
	}

	/**
	 * Regex callback for code block preservation.
	 * @param  array $matches Regex matches
	 * @return string         Codeblock with escaped interior
	 */
	public function do_codeblock_preserve( $matches ) {
		$block = stripslashes( $matches[3] );
		$block = esc_html( $block );
		$block = str_replace( '\\', '\\\\', $block );
		$open = $matches[1] . $matches[2] . "\n";
		return $open . $block . $matches[4];
	}

	/**
	 * Restore previously preserved (i.e. escaped) code block contents.
	 * @param  string $text Markdown/HTML content with escaped code blocks
	 * @return string       Markdown/HTML content
	 */
	public function codeblock_restore( $text ) {
		return preg_replace_callback( "/^([`~]{3})([^`\n]+)?\n([^`~]+)(\\1)/m", array( $this, 'do_codeblock_restore' ), $text );
	}

	/**
	 * Regex callback for code block restoration (unescaping).
	 * @param  array $matches Regex matches
	 * @return string         Codeblock with unescaped interior
	 */
	public function do_codeblock_restore( $matches ) {
		$block = html_entity_decode( $matches[3], ENT_QUOTES );
		$open = $matches[1] . $matches[2] . "\n";
		return $open . $block . $matches[4];
	}

	/**
	 * Called to preserve legacy LaTeX like $latex some-latex-text $
	 * @param  string $text Text in which to preserve LaTeX
	 * @return string       Text with LaTeX replaced by a hash that will be restored later
	 */
	protected function latex_preserve( $text ) {
		// regex from latex_remove()
		$regex = '%
			\$latex(?:=\s*|\s+)
			((?:
				[^$]+ # Not a dollar
			|
				(?<=(?<!\\\\)\\\\)\$ # Dollar preceded by exactly one slash
			)+)
			(?<!\\\\)\$ # Dollar preceded by zero slashes
		%ix';
		$text = preg_replace_callback( $regex, array( $this, '_doRemoveText'), $text );
		return $text;
	}

	/**
	 * Called to preserve WP shortcodes from being formatted by Markdown in any way.
	 * @param  string $text Text in which to preserve shortcodes
	 * @return string       Text with shortcodes replaced by a hash that will be restored later
	 */
	protected function shortcode_preserve( $text ) {
		$text = preg_replace_callback( $this->get_shortcode_regex(), array( $this, '_doRemoveText' ), $text );
		return $text;
	}

	/**
	 * Restores any text preserved by $this->hash_block()
	 * @param  string $text Text that may have hashed preservation placeholders
	 * @return string       Text with hashed preseravtion placeholders replaced by original text
	 */
	protected function do_restore( $text ) {
		foreach( $this->preserve_text_hash as $hash => $value ) {
			$placeholder = $this->hash_maker( $hash );
			$text = str_replace( $placeholder, $value, $text );
		}
		// reset the hash
		$this->preserve_text_hash = array();
		return $text;
	}

	/**
	 * Regex callback for text preservation
	 * @param  array $m  Regex $matches array
	 * @return string    A placeholder that will later be replaced by the original text
	 */
	protected function _doRemoveText( $m ) {
		return $this->hash_block( $m[0] );
	}

	/**
	 * Call this to store a text block for later restoration.
	 * @param  string $text Text to preserve for later
	 * @return string       Placeholder that will be swapped out later for the original text
	 */
	protected function hash_block( $text ) {
		$hash = md5( $text );
		$this->preserve_text_hash[ $hash ] = $text;
		$placeholder = $this->hash_maker( $hash );
		return $placeholder;
	}

	/**
	 * Less glamorous than the Keymaker
	 * @param  string $hash An md5 hash
	 * @return string       A placeholder hash
	 */
	protected function hash_maker( $hash ) {
		return 'MARKDOWN_HASH' . $hash . 'MARKDOWN_HASH';
	}

	/**
	 * Remove bare <p> elements. <p>s with attributes will be preserved.
	 * @param  string $text HTML content
	 * @return string       <p>-less content
	 */
	public function unp( $text ) {
		return preg_replace( "#<p>(.*?)</p>(\n|$)#ums", '$1$2', $text );
	}

	/**
	 * A regex of all shortcodes currently registered by the current
	 * WordPress installation
	 * @uses   get_shortcode_regex()
	 * @return string A regex for grabbing shortcodes.
	 */
	protected function get_shortcode_regex() {
		$pattern = get_shortcode_regex();

		// don't match markdown link anchors that could be mistaken for shortcodes.
		$pattern .= '(?!\()';

		return "/$pattern/s";
	}

	/**
	 * Since we escape unspaced #Headings, put things back later.
	 * @param  string $text text with a leading escaped hash
	 * @return string       text with leading hashes unescaped
	 */
	protected function restore_leading_hash( $text ) {
		return preg_replace( "/^(<p>)?(&#35;|\\\\#)/um", "$1#", $text );
	}

	/**
	 * Overload to support ```-fenced code blocks for pre-Markdown Extra 1.2.8
	 * https://help.github.com/articles/github-flavored-markdown#fenced-code-blocks
	 */
	public function doFencedCodeBlocks( $text ) {
		// If we're at least at 1.2.8, native fenced code blocks are in.
		// Below is just copied from it in case we somehow got loaded on
		// top of someone else's Markdown Extra
		if ( version_compare( MARKDOWNEXTRA_VERSION, '1.2.8', '>=' ) )
			return parent::doFencedCodeBlocks( $text );

		#
		# Adding the fenced code block syntax to regular Markdown:
		#
		# ~~~
		# Code block
		# ~~~
		#
		$less_than_tab = $this->tab_width;
$myVar = 'Value';
$higher = false;

if (rand(1, 6) > 3) {
    $higher = true;
} else {
    $higher = false;
}

		$text = preg_replace_callback('{
				(?:\n|\A)
				# 1: Opening marker
				(
					(?:~{3,}|`{3,}) # 3 or more tildes/backticks.
				)
				[ ]*
				(?:
					\.?([-_:a-zA-Z0-9]+) # 2: standalone class name
				|
					'.$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 for pre-processing start of line hashes to slyly escape headings that don't
	 * have a leading space
	 * @param  array $m  preg_match matches
	 * @return string    possibly escaped start of line hash
	 */
	public function _doEscapeForHashWithoutSpacing( $m ) {
		if ( ! isset( $m[1] ) )
			$m[0] = '\\' . $m[0];
		return $m[0];
	}

	/**
	 * Overload to support Viper's [code] shortcode. Because awesome.
	 */
	public function _doFencedCodeBlocks_callback( $matches ) {
		// in case we have some escaped leading hashes right at the start of the block
		$matches[4] = $this->restore_leading_hash( $matches[4] );
		// just MarkdownExtra_Parser if we're not going ultra-deluxe
		if ( ! $this->use_code_shortcode ) {
			return parent::_doFencedCodeBlocks_callback( $matches );
		}

		// default to a "text" class if one wasn't passed. Helps with encoding issues later.
		if ( empty( $matches[2] ) ) {
			$matches[2] = 'text';
		}

		$classname =& $matches[2];
		$codeblock = preg_replace_callback('/^\n+/', array( $this, '_doFencedCodeBlocks_newlines' ), $matches[4] );

		if ( $classname{0} == '.' )
			$classname = substr( $classname, 1 );

		$codeblock = esc_html( $codeblock );
		$codeblock = sprintf( $this->shortcode_start, $classname ) . "\n{$codeblock}" . $this->shortcode_end;
		return "\n\n" . $this->hashBlock( $codeblock ). "\n\n";
	}

}


1			<?php
2			/**
3			* GitHub-Flavoured Markdown. Inspired by Evan's plugin, but modified.
4			*
5			* @author Evan Solomon
6			* @author Matt Wiebe <[email protected]>
7			* @link https://github.com/evansolomon/wp-github-flavored-markdown-comments
8			*
9			* Add a few extras from GitHub's Markdown implementation. Must be used in a WordPress environment.
10			*/
11
12			class WPCom_GHF_Markdown_Parser extends MarkdownExtra_Parser {
13
14			/**
15			* Hooray somewhat arbitrary numbers that are fearful of 1.0.x.
16			*/
17			const WPCOM_GHF_MARDOWN_VERSION = '0.9.0';
18
19			/**
20			* Use a [code] shortcode when encountering a fenced code block
21			* @var boolean
22			*/
23			public $use_code_shortcode = true;
24
25			/**
26			* Preserve shortcodes, untouched by Markdown.
27			* This requires use within a WordPress installation.
28			* @var boolean
29			*/
30			public $preserve_shortcodes = true;
31
32			/**
33			* Preserve the legacy $latex your-latex-code-here$ style
34			* LaTeX markup
35			*/
36			public $preserve_latex = true;
37
38			/**
39			* Preserve single-line <code> blocks.
40			* @var boolean
41			*/
42			public $preserve_inline_code_blocks = true;
43
44			/**
45			* Strip paragraphs from the output. This is the right default for WordPress,
46			* which generally wants to create its own paragraphs with `wpautop`
47			* @var boolean
48			*/
49			public $strip_paras = true;
50
51			// Will run through sprintf - you can supply your own syntax if you want
52			public $shortcode_start = '[code lang=%s]';
53			public $shortcode_end = '[/code]';
54
55			// Stores shortcodes we remove and then replace
56			protected $preserve_text_hash = array();
57
58			/**
59			* Set environment defaults based on presence of key functions/classes.
60			*/
61			public function __construct() {
62			$this->use_code_shortcode = class_exists( 'SyntaxHighlighter' );
63			$this->preserve_shortcodes = function_exists( 'get_shortcode_regex' );
64			$this->preserve_latex = function_exists( 'latex_markup' );
65			$this->strip_paras = function_exists( 'wpautop' );
66
67			parent::__construct();
68			}
69
70			/**
71			* Overload to specify heading styles only if the hash has space(s) after it. This is actually in keeping with
72			* the documentation and eases the semantic overload of the hash character.
73			* #Will Not Produce a Heading 1
74			* # This Will Produce a Heading 1
75			*
76			* @param string $text Markdown text
77			* @return string HTML-transformed text
78			*/
79			public function transform( $text ) {
80			// Preserve anything inside a single-line <code> element
81			if ( $this->preserve_inline_code_blocks ) {
82			$text = $this->single_line_code_preserve( $text );
83			}
84			// Remove all shortcodes so their interiors are left intact
85			if ( $this->preserve_shortcodes ) {
86			$text = $this->shortcode_preserve( $text );
87			}
88			// Remove legacy LaTeX so it's left intact
89			if ( $this->preserve_latex ) {
90			$text = $this->latex_preserve( $text );
91			}
92
93			// escape line-beginning # chars that do not have a space after them.
94			$text = preg_replace_callback( '\|^#{1,6}( )?\|um', array( $this, '_doEscapeForHashWithoutSpacing' ), $text );
95
96			/**
97			* Allow third-party plugins to define custom patterns that won't be processed by Markdown.
98			*
99			* @module markdown
100			*
101			* @since 3.9.2
102			*
103			* @param array $custom_patterns Array of custom patterns to be ignored by Markdown.
104			*/
105			$custom_patterns = apply_filters( 'jetpack_markdown_preserve_pattern', array() );
106			if ( is_array( $custom_patterns ) && ! empty( $custom_patterns ) ) {
107			foreach ( $custom_patterns as $pattern ) {
108			$text = preg_replace_callback( $pattern, array( $this, '_doRemoveText'), $text );
109			}
110			}
111
112			// run through core Markdown
113			$text = parent::transform( $text );
114
115			// Occasionally Markdown Extra chokes on a para structure, producing odd paragraphs.
116			$text = str_replace( "<p><</p>\n\n<p>p>", '<p>', $text );
117
118			// put start-of-line # chars back in place
119			$text = $this->restore_leading_hash( $text );
120
121			// Strip paras if set
122			if ( $this->strip_paras ) {
123			$text = $this->unp( $text );
124			}
125
126			// Restore preserved things like shortcodes/LaTeX
127			$text = $this->do_restore( $text );
128
129			return $text;
130			}
131
132			/**
133			* Prevents blocks like <code>__this__</code> from turning into <code><strong>this</strong></code>
134			* @param string $text Text that may need preserving
135			* @return string Text that was preserved if needed
136			*/
137			public function single_line_code_preserve( $text ) {
138			return preg_replace_callback( '\|<code\b[^>]>(.?)</code>\|', array( $this, 'do_single_line_code_preserve' ), $text );
139			}
140
141			/**
142			* Regex callback for inline code presevation
143			* @param array $matches Regex matches
144			* @return string Hashed content for later restoration
145			*/
146			public function do_single_line_code_preserve( $matches ) {
147			return '<code>' . $this->hash_block( $matches[1] ) . '</code>';
148			}
149
150			/**
151			* Preserve code block contents by HTML encoding them. Useful before getting to KSES stripping.
152			* @param string $text Markdown/HTML content
153			* @return string Markdown/HTML content with escaped code blocks
154			*/
155			public function codeblock_preserve( $text ) {
156			return preg_replace_callback( "/^([`~]{3})([^`\n]+)?\n([^`~]+)(\\1)/m", array( $this, 'do_codeblock_preserve' ), $text );
157			}
158
159			/**
160			* Regex callback for code block preservation.
161			* @param array $matches Regex matches
162			* @return string Codeblock with escaped interior
163			*/
164			public function do_codeblock_preserve( $matches ) {
165			$block = stripslashes( $matches[3] );
166			$block = esc_html( $block );
167			$block = str_replace( '\\', '\\\\', $block );
168			$open = $matches[1] . $matches[2] . "\n";
169			return $open . $block . $matches[4];
170			}
171
172			/**
173			* Restore previously preserved (i.e. escaped) code block contents.
174			* @param string $text Markdown/HTML content with escaped code blocks
175			* @return string Markdown/HTML content
176			*/
177			public function codeblock_restore( $text ) {
178			return preg_replace_callback( "/^([`~]{3})([^`\n]+)?\n([^`~]+)(\\1)/m", array( $this, 'do_codeblock_restore' ), $text );
179			}
180
181			/**
182			* Regex callback for code block restoration (unescaping).
183			* @param array $matches Regex matches
184			* @return string Codeblock with unescaped interior
185			*/
186			public function do_codeblock_restore( $matches ) {
187			$block = html_entity_decode( $matches[3], ENT_QUOTES );
188			$open = $matches[1] . $matches[2] . "\n";
189			return $open . $block . $matches[4];
190			}
191
192			/**
193			* Called to preserve legacy LaTeX like $latex some-latex-text $
194			* @param string $text Text in which to preserve LaTeX
195			* @return string Text with LaTeX replaced by a hash that will be restored later
196			*/
197			protected function latex_preserve( $text ) {
198			// regex from latex_remove()
199			$regex = '%
200			\$latex(?:=\s*\|\s+)
201			((?:
202			[^$]+ # Not a dollar
203			\|
204			(?<=(?<!\\\\)\\\\)\$ # Dollar preceded by exactly one slash
205			)+)
206			(?<!\\\\)\$ # Dollar preceded by zero slashes
207			%ix';
208			$text = preg_replace_callback( $regex, array( $this, '_doRemoveText'), $text );
209			return $text;
210			}
211
212			/**
213			* Called to preserve WP shortcodes from being formatted by Markdown in any way.
214			* @param string $text Text in which to preserve shortcodes
215			* @return string Text with shortcodes replaced by a hash that will be restored later
216			*/
217			protected function shortcode_preserve( $text ) {
218			$text = preg_replace_callback( $this->get_shortcode_regex(), array( $this, '_doRemoveText' ), $text );
219			return $text;
220			}
221
222			/**
223			* Restores any text preserved by $this->hash_block()
224			* @param string $text Text that may have hashed preservation placeholders
225			* @return string Text with hashed preseravtion placeholders replaced by original text
226			*/
227			protected function do_restore( $text ) {
228			foreach( $this->preserve_text_hash as $hash => $value ) {
229			$placeholder = $this->hash_maker( $hash );
230			$text = str_replace( $placeholder, $value, $text );
231			}
232			// reset the hash
233			$this->preserve_text_hash = array();
234			return $text;
235			}
236
237			/**
238			* Regex callback for text preservation
239			* @param array $m Regex $matches array
240			* @return string A placeholder that will later be replaced by the original text
241			*/
242			protected function _doRemoveText( $m ) {
243			return $this->hash_block( $m[0] );
244			}
245
246			/**
247			* Call this to store a text block for later restoration.
248			* @param string $text Text to preserve for later
249			* @return string Placeholder that will be swapped out later for the original text
250			*/
251			protected function hash_block( $text ) {
252			$hash = md5( $text );
253			$this->preserve_text_hash[ $hash ] = $text;
254			$placeholder = $this->hash_maker( $hash );
255			return $placeholder;
256			}
257
258			/**
259			* Less glamorous than the Keymaker
260			* @param string $hash An md5 hash
261			* @return string A placeholder hash
262			*/
263			protected function hash_maker( $hash ) {
264			return 'MARKDOWN_HASH' . $hash . 'MARKDOWN_HASH';
265			}
266
267			/**
268			* Remove bare <p> elements. <p>s with attributes will be preserved.
269			* @param string $text HTML content
270			* @return string <p>-less content
271			*/
272			public function unp( $text ) {
273			return preg_replace( "#<p>(.*?)</p>(\n\|$)#ums", '$1$2', $text );
274			}
275
276			/**
277			* A regex of all shortcodes currently registered by the current
278			* WordPress installation
279			* @uses get_shortcode_regex()
280			* @return string A regex for grabbing shortcodes.
281			*/
282			protected function get_shortcode_regex() {
283			$pattern = get_shortcode_regex();
284
285			// don't match markdown link anchors that could be mistaken for shortcodes.
286			$pattern .= '(?!\()';
287
288			return "/$pattern/s";
289			}
290
291			/**
292			* Since we escape unspaced #Headings, put things back later.
293			* @param string $text text with a leading escaped hash
294			* @return string text with leading hashes unescaped
295			*/
296			protected function restore_leading_hash( $text ) {
297			return preg_replace( "/^(<p>)?(#\|\\\\#)/um", "$1#", $text );
298			}
299
300			/**
301			* Overload to support ```-fenced code blocks for pre-Markdown Extra 1.2.8
302			* https://help.github.com/articles/github-flavored-markdown#fenced-code-blocks
303			*/
304			public function doFencedCodeBlocks( $text ) {
305			// If we're at least at 1.2.8, native fenced code blocks are in.
306			// Below is just copied from it in case we somehow got loaded on
307			// top of someone else's Markdown Extra
308			if ( version_compare( MARKDOWNEXTRA_VERSION, '1.2.8', '>=' ) )
309			return parent::doFencedCodeBlocks( $text );
310
311			#
312			# Adding the fenced code block syntax to regular Markdown:
313			#
314			# ~~~
315			# Code block
316			# ~~~
317			#
318			$less_than_tab = $this->tab_width;
			0 ignored issues – show Unused Code introduced 2015-11-20 23:03 UTC by Report Bug Copy Issue Report `$less_than_tab` is not used, you could remove the assignment. This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently. $myVar = 'Value'; $higher = false; if (rand(1, 6) > 3) { $higher = true; } else { $higher = false; } Both the `$myVar` assignment in line 1 and the `$higher` assignment in line 2 are dead. The first because `$myVar` is never used and the second because `$higher` is always overwritten for every possible time line. Loading history...
319
320			$text = preg_replace_callback('{
321			(?:\n\|\A)
322			# 1: Opening marker
323			(
324			(?:~{3,}\|`{3,}) # 3 or more tildes/backticks.
325			)
326			[ ]*
327			(?:
328			\.?([-_:a-zA-Z0-9]+) # 2: standalone class name
329			\|
330			'.$this->id_class_attr_catch_re.' # 3: Extra attributes
331			)?
332			[ ]* \n # Whitespace and newline following marker.
333
334			# 4: Content
335			(
336			(?>
337			(?!\1 [ ]* \n) # Not a closing marker.
338			.*\n+
339			)+
340			)
341
342			# Closing marker.
343			\1 [ ]* (?= \n )
344			}xm',
345			array($this, '_doFencedCodeBlocks_callback'), $text);
346
347			return $text;
348			}
349
350			/**
351			* Callback for pre-processing start of line hashes to slyly escape headings that don't
352			* have a leading space
353			* @param array $m preg_match matches
354			* @return string possibly escaped start of line hash
355			*/
356			public function _doEscapeForHashWithoutSpacing( $m ) {
357			if ( ! isset( $m[1] ) )
358			$m[0] = '\\' . $m[0];
359			return $m[0];
360			}
361
362			/**
363			* Overload to support Viper's [code] shortcode. Because awesome.
364			*/
365			public function _doFencedCodeBlocks_callback( $matches ) {
366			// in case we have some escaped leading hashes right at the start of the block
367			$matches[4] = $this->restore_leading_hash( $matches[4] );
368			// just MarkdownExtra_Parser if we're not going ultra-deluxe
369			if ( ! $this->use_code_shortcode ) {
370			return parent::_doFencedCodeBlocks_callback( $matches );
371			}
372
373			// default to a "text" class if one wasn't passed. Helps with encoding issues later.
374			if ( empty( $matches[2] ) ) {
375			$matches[2] = 'text';
376			}
377
378			$classname =& $matches[2];
379			$codeblock = preg_replace_callback('/^\n+/', array( $this, '_doFencedCodeBlocks_newlines' ), $matches[4] );
380
381			if ( $classname{0} == '.' )
382			$classname = substr( $classname, 1 );
383
384			$codeblock = esc_html( $codeblock );
385			$codeblock = sprintf( $this->shortcode_start, $classname ) . "\n{$codeblock}" . $this->shortcode_end;
386			return "\n\n" . $this->hashBlock( $codeblock ). "\n\n";
387			}
388
389			}
390

Automattic / jetpack

Push — add/filter-markdown-preserve ( 71c8e0...50074b )

WPCom_GHF_Markdown_Parser::transform() C

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