1 files changed, 100 insertions, 0 deletions
diff --git a/www/wiki/includes/tidy/RaggettWrapper.php b/www/wiki/includes/tidy/RaggettWrapper.php
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+++ b/www/wiki/includes/tidy/RaggettWrapper.php
@@ -0,0 +1,100 @@
+<?php
+namespace MediaWiki\Tidy;
+
+use ParserOutput;
+use Parser;
+
+/**
+ * Class used to hide mw:editsection tokens from Tidy so that it doesn't break them
+ * or break on them. This is a bit of a hack for now, but hopefully in the future
+ * we may create a real postprocessor or something that will replace this.
+ * It's called wrapper because for now it basically takes over MWTidy::tidy's task
+ * of wrapping the text in a xhtml block
+ *
+ * This re-uses some of the parser's UNIQ tricks, though some of it is private so it's
+ * duplicated. Perhaps we should create an abstract marker hiding class.
+ *
+ * @ingroup Parser
+ */
+class RaggettWrapper {
+
+	/**
+	 * @var array
+	 */
+	protected $mTokens;
+
+	/**
+	 * @var int
+	 */
+	protected $mMarkerIndex;
+
+	/**
+	 * @param string $text
+	 * @return string
+	 */
+	public function getWrapped( $text ) {
+		$this->mTokens = [];
+		$this->mMarkerIndex = 0;
+
+		// Replace <mw:editsection> elements with placeholders
+		$wrappedtext = preg_replace_callback( ParserOutput::EDITSECTION_REGEX,
+			[ $this, 'replaceCallback' ], $text );
+		// ...and <mw:toc> markers
+		$wrappedtext = preg_replace_callback( '/\<\\/?mw:toc\>/',
+			[ $this, 'replaceCallback' ], $wrappedtext );
+		// ... and <math> tags
+		$wrappedtext = preg_replace_callback( '/\<math(.*?)\<\\/math\>/s',
+			[ $this, 'replaceCallback' ], $wrappedtext );
+		// Modify inline Microdata <link> and <meta> elements so they say <html-link> and <html-meta> so
+		// we can trick Tidy into not stripping them out by including them in tidy's new-empty-tags config
+		$wrappedtext = preg_replace( '!<(link|meta)([^>]*?)(/{0,1}>)!', '<html-$1$2$3', $wrappedtext );
+		// Similar for inline <style> tags, but those aren't empty.
+		$wrappedtext = preg_replace_callback( '!<style([^>]*)>(.*?)</style>!s', function ( $m ) {
+			return '<html-style' . $m[1] . '>'
+				. $this->replaceCallback( [ $m[2] ] )
+				. '</html-style>';
+		}, $wrappedtext );
+
+		// Preserve empty li elements (T49673) by abusing Tidy's datafld hack
+		// The whitespace class is as in TY_(InitMap)
+		$wrappedtext = preg_replace( "!<li>([ \r\n\t\f]*)</li>!",
+			'<li datafld="" class="mw-empty-elt">\1</li>', $wrappedtext );
+
+		// Wrap the whole thing in a doctype and body for Tidy.
+		$wrappedtext = '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"' .
+			' "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html>' .
+			'<head><title>test</title></head><body>' . $wrappedtext . '</body></html>';
+
+		return $wrappedtext;
+	}
+
+	/**
+	 * @param array $m
+	 * @return string
+	 */
+	private function replaceCallback( array $m ) {
+		$marker = Parser::MARKER_PREFIX . "-item-{$this->mMarkerIndex}" . Parser::MARKER_SUFFIX;
+		$this->mMarkerIndex++;
+		$this->mTokens[$marker] = $m[0];
+		return $marker;
+	}
+
+	/**
+	 * @param string $text
+	 * @return string
+	 */
+	public function postprocess( $text ) {
+		// Revert <html-{link,meta,style}> back to <{link,meta,style}>
+		$text = preg_replace( '!<html-(link|meta)([^>]*?)(/{0,1}>)!', '<$1$2$3', $text );
+		$text = preg_replace( '!<(/?)html-(style)([^>]*)>!', '<$1$2$3>', $text );
+
+		// Remove datafld
+		$text = str_replace( '<li datafld=""', '<li', $text );
+
+		// Restore the contents of placeholder tokens
+		$text = strtr( $text, $this->mTokens );
+
+		return $text;
+	}
+
+}