100 lines
2.3 KiB
PHP
100 lines
2.3 KiB
PHP
<?php
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use DataValues\StringValue;
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use ValueFormatters\ValueFormatter;
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use Wikibase\Lib\Formatters\SnakFormatter;
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/**
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* Formats the tex string based on the known formats
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* - text/plain: used in the value input field of Wikidata
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* - text/x-wiki: wikitext
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* - text/html: used in Wikidata to display the value of properties
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* Formats can look like this: "text/html; disposition=diff"
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* or just "text/plain"
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*/
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class MathFormatter implements ValueFormatter {
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/**
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* @var string One of the SnakFormatter::FORMAT_... constants.
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*/
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private $format;
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/**
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* Loads format to distinguish the type of formatting
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*
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* @param string $format One of the SnakFormatter::FORMAT_... constants.
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*/
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public function __construct( $format ) {
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$this->format = $format;
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}
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/**
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* @param StringValue $value
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*
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* @throws InvalidArgumentException if not called with a StringValue
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* @return string
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*/
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public function format( $value ) {
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if ( !( $value instanceof StringValue ) ) {
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throw new InvalidArgumentException( '$value must be a StringValue' );
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}
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$tex = $value->getValue();
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switch ( $this->format ) {
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case SnakFormatter::FORMAT_PLAIN:
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return $tex;
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case SnakFormatter::FORMAT_WIKI:
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return "<math>$tex</math>";
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// Intentionally fall back to MathML output in all other, possibly unknown cases.
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default:
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$renderer = new MathMathML( $tex );
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if ( $renderer->checkTeX() && $renderer->render() ) {
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$html = $renderer->getHtmlOutput();
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} else {
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$html = $renderer->getLastError();
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}
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if ( $this->format === SnakFormatter::FORMAT_HTML_DIFF ) {
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$html = $this->formatDetails( $html, $tex );
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}
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return $html;
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}
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}
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/**
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* Constructs a detailed HTML rendering for use in diff views.
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*
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* @param string $valueHtml
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* @param string $tex
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*
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* @return string HTML
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*/
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private function formatDetails( $valueHtml, $tex ) {
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$html = '';
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$html .= Html::rawElement( 'h4',
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[ 'class' => 'wb-details wb-math-details wb-math-rendered' ],
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$valueHtml
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);
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$html .= Html::rawElement( 'div',
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[ 'class' => 'wb-details wb-math-details' ],
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Html::element( 'code', [], $tex )
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);
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return $html;
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}
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/**
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* @return string One of the SnakFormatter::FORMAT_... constants.
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*/
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public function getFormat() {
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return $this->format;
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}
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}
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