2016-08-29 22:27:54 +00:00
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<?php
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/**
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* @file
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* @ingroup Testing
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*/
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class ParserTestResultNormalizer {
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protected $doc, $xpath, $invalid;
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public static function normalize( $text, $funcs ) {
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$norm = new self( $text );
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if ( $norm->invalid ) {
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return $text;
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}
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foreach ( $funcs as $func ) {
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$norm->$func();
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}
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return $norm->serialize();
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}
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protected function __construct( $text ) {
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$this->doc = new DOMDocument( '1.0', 'utf-8' );
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// Note: parsing a supposedly XHTML document with an XML parser is not
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// guaranteed to give accurate results. For example, it may introduce
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// differences in the number of line breaks in <pre> tags.
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2018-02-10 07:52:26 +00:00
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Wikimedia\suppressWarnings();
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2016-08-29 22:27:54 +00:00
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if ( !$this->doc->loadXML( '<html><body>' . $text . '</body></html>' ) ) {
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$this->invalid = true;
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}
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2018-02-10 07:52:26 +00:00
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Wikimedia\restoreWarnings();
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2016-08-29 22:27:54 +00:00
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$this->xpath = new DOMXPath( $this->doc );
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$this->body = $this->xpath->query( '//body' )->item( 0 );
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}
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protected function removeTbody() {
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foreach ( $this->xpath->query( '//tbody' ) as $tbody ) {
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while ( $tbody->firstChild ) {
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$child = $tbody->firstChild;
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$tbody->removeChild( $child );
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$tbody->parentNode->insertBefore( $child, $tbody );
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}
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$tbody->parentNode->removeChild( $tbody );
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}
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}
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/**
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* The point of this function is to produce a normalized DOM in which
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* Tidy's output matches the output of html5depurate. Tidy both trims
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* and pretty-prints, so this requires fairly aggressive treatment.
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*
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* In particular, note that Tidy converts <pre>x</pre> to <pre>\nx\n</pre>,
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* which theoretically affects display since the second line break is not
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* ignored by compliant HTML parsers.
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*
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* This function also removes empty elements, as does Tidy.
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*/
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protected function trimWhitespace() {
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foreach ( $this->xpath->query( '//text()' ) as $child ) {
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if ( strtolower( $child->parentNode->nodeName ) === 'pre' ) {
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// Just trim one line break from the start and end
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if ( substr_compare( $child->data, "\n", 0 ) === 0 ) {
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$child->data = substr( $child->data, 1 );
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}
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if ( substr_compare( $child->data, "\n", -1 ) === 0 ) {
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$child->data = substr( $child->data, 0, -1 );
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}
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} else {
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// Trim all whitespace
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$child->data = trim( $child->data );
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}
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if ( $child->data === '' ) {
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$child->parentNode->removeChild( $child );
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}
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}
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}
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/**
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* Serialize the XML DOM for comparison purposes. This does not generate HTML.
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2017-09-09 20:47:04 +00:00
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* @return string
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2016-08-29 22:27:54 +00:00
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*/
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protected function serialize() {
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return strtr( $this->doc->saveXML( $this->body ),
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[ '<body>' => '', '</body>' => '' ] );
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}
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}
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