format = $format; break; default: throw new InvalidArgumentException( 'Unsupported output format: ' . $format ); } } /** * @param StringValue $value * * @throws MismatchingDataValueTypeException * @return string */ public function format( $value ) { if ( !( $value instanceof StringValue ) ) { throw new MismatchingDataValueTypeException( 'StringValue', get_class( $value ) ); } $tex = $value->getValue(); switch ( $this->format ) { case SnakFormatter::FORMAT_PLAIN: return $tex; case SnakFormatter::FORMAT_WIKI: return "$\$tex$"; default: $renderer = new MathMathML( $tex ); if ( $renderer->checkTex() && $renderer->render() ) { $html = $renderer->getHtmlOutput(); } else { $html = $renderer->getLastError(); } if ( $this->format === SnakFormatter::FORMAT_HTML_DIFF ) { $html = $this->formatDetails( $html, $tex ); } // TeX string is not valid or rendering failed return $html; } } /** * Constructs a detailed HTML rendering for use in diff views. * * @param string $valueHtml HTML * @param string $tex TeX * * @return string HTML */ private function formatDetails( $valueHtml, $tex ) { $html = ''; $html .= Html::rawElement( 'h4', [ 'class' => 'wb-details wb-math-details wb-math-rendered' ], $valueHtml ); $html .= Html::rawElement( 'div', [ 'class' => 'wb-details wb-math-details' ], Html::element( 'code', [], $tex ) ); return $html; } /** * @return string One of the SnakFormatter::FORMAT_... constants. */ public function getFormat() { return $this->format; } }