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| 1 | <?php |
| 2 | |
| 3 | namespace MediaWiki\Extension\Math\HookHandlers; |
| 4 | |
| 5 | use MediaWiki\Extension\Math\Hooks\HookRunner; |
| 6 | use MediaWiki\Extension\Math\MathConfig; |
| 7 | use MediaWiki\Extension\Math\MathMathML; |
| 8 | use MediaWiki\Extension\Math\MathMathMLCli; |
| 9 | use MediaWiki\Extension\Math\MathRenderer; |
| 10 | use MediaWiki\Extension\Math\Render\RendererFactory; |
| 11 | use MediaWiki\Hook\ParserAfterTidyHook; |
| 12 | use MediaWiki\Hook\ParserFirstCallInitHook; |
| 13 | use MediaWiki\Hook\ParserOptionsRegisterHook; |
| 14 | use MediaWiki\HookContainer\HookContainer; |
| 15 | use MediaWiki\Logger\LoggerFactory; |
| 16 | use MediaWiki\Parser\Parser; |
| 17 | use MediaWiki\Parser\ParserOptions; |
| 18 | use MediaWiki\User\Options\UserOptionsLookup; |
| 19 | |
| 20 | /** |
| 21 | * Hook handler for Parser hooks |
| 22 | */ |
| 23 | class ParserHooksHandler implements |
| 24 | ParserFirstCallInitHook, |
| 25 | ParserAfterTidyHook, |
| 26 | ParserOptionsRegisterHook |
| 27 | { |
| 28 | |
| 29 | /** @var int */ |
| 30 | private $mathTagCounter = 1; |
| 31 | |
| 32 | /** @var array[] renders delayed to be done as a batch [ MathRenderer, Parser ] */ |
| 33 | private $mathLazyRenderBatch = []; |
| 34 | |
| 35 | /** @var RendererFactory */ |
| 36 | private $rendererFactory; |
| 37 | |
| 38 | /** @var UserOptionsLookup */ |
| 39 | private $userOptionsLookup; |
| 40 | |
| 41 | /** @var HookRunner */ |
| 42 | private $hookRunner; |
| 43 | |
| 44 | /** |
| 45 | * @param RendererFactory $rendererFactory |
| 46 | * @param UserOptionsLookup $userOptionsLookup |
| 47 | * @param HookContainer $hookContainer |
| 48 | */ |
| 49 | public function __construct( |
| 50 | RendererFactory $rendererFactory, |
| 51 | UserOptionsLookup $userOptionsLookup, |
| 52 | HookContainer $hookContainer |
| 53 | ) { |
| 54 | $this->rendererFactory = $rendererFactory; |
| 55 | $this->userOptionsLookup = $userOptionsLookup; |
| 56 | $this->hookRunner = new HookRunner( $hookContainer ); |
| 57 | } |
| 58 | |
| 59 | /** |
| 60 | * Register the <math> tag with the Parser. |
| 61 | * |
| 62 | * @param Parser $parser |
| 63 | */ |
| 64 | public function onParserFirstCallInit( $parser ) { |
| 65 | $parser->setHook( 'math', [ $this, 'mathTagHook' ] ); |
| 66 | // @deprecated the ce tag is deprecated in favour of chem cf. T153606 |
| 67 | $parser->setHook( 'ce', [ $this, 'chemTagHook' ] ); |
| 68 | $parser->setHook( 'chem', [ $this, 'chemTagHook' ] ); |
| 69 | } |
| 70 | |
| 71 | /** |
| 72 | * Callback function for the <math> parser hook. |
| 73 | * |
| 74 | * @param ?string $content (the LaTeX input) |
| 75 | * @param array $attributes |
| 76 | * @param Parser $parser |
| 77 | * @return array|string |
| 78 | */ |
| 79 | public function mathTagHook( ?string $content, array $attributes, Parser $parser ) { |
| 80 | global $wgMathSvgRenderer; |
| 81 | $mode = $parser->getOptions()->getOption( 'math' ); |
| 82 | if ( $mode === MathConfig::MODE_NATIVE_JAX ) { |
| 83 | $parser->getOutput()->addModules( [ 'ext.math.mathjax' ] ); |
| 84 | $mode = MathConfig::MODE_NATIVE_MML; |
| 85 | } |
| 86 | $renderer = $this->rendererFactory->getRenderer( $content ?? '', $attributes, $mode ); |
| 87 | |
| 88 | $parser->getOutput()->addModuleStyles( [ 'ext.math.styles' ] ); |
| 89 | if ( array_key_exists( "qid", $attributes ) ) { |
| 90 | $parser->getOutput()->addModules( [ 'ext.math.popup' ] ); |
| 91 | } |
| 92 | if ( $wgMathSvgRenderer === 'restbase' && $mode == MathConfig::MODE_MATHML ) { |
| 93 | $marker = Parser::MARKER_PREFIX . |
| 94 | '-postMath-' . sprintf( '%08X', $this->mathTagCounter++ ) . |
| 95 | Parser::MARKER_SUFFIX; |
| 96 | $this->mathLazyRenderBatch[$marker] = [ $renderer, $parser ]; |
| 97 | return $marker; |
| 98 | } |
| 99 | return [ $this->mathPostTagHook( $renderer, $parser ), 'markerType' => 'nowiki' ]; |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * Callback function for the <ce> parser hook. |
| 104 | * |
| 105 | * @param ?string $content (the LaTeX input) |
| 106 | * @param array $attributes |
| 107 | * @param Parser $parser |
| 108 | * @return array|string |
| 109 | */ |
| 110 | public function chemTagHook( ?string $content, array $attributes, Parser $parser ) { |
| 111 | $attributes['chem'] = true; |
| 112 | return $this->mathTagHook( '\ce{' . $content . '}', $attributes, $parser ); |
| 113 | } |
| 114 | |
| 115 | /** |
| 116 | * Callback function for the <math> parser hook. |
| 117 | * |
| 118 | * @param MathRenderer $renderer |
| 119 | * @param Parser $parser |
| 120 | * @return string |
| 121 | */ |
| 122 | private function mathPostTagHook( MathRenderer $renderer, Parser $parser ) { |
| 123 | $checkResult = $renderer->checkTeX(); |
| 124 | |
| 125 | if ( $checkResult !== true ) { |
| 126 | $renderer->addTrackingCategories( $parser ); |
| 127 | return $renderer->getLastError(); |
| 128 | } |
| 129 | |
| 130 | if ( $renderer->render() ) { |
| 131 | LoggerFactory::getInstance( 'Math' )->debug( "Rendering successful. Writing output" ); |
| 132 | $renderedMath = $renderer->getHtmlOutput(); |
| 133 | $renderer->addTrackingCategories( $parser ); |
| 134 | } else { |
| 135 | LoggerFactory::getInstance( 'Math' )->warning( |
| 136 | "Rendering failed. Printing error message." ); |
| 137 | // Set a short parser cache time (10 minutes) after encountering |
| 138 | // render issues, but not syntax issues. |
| 139 | $parser->getOutput()->updateCacheExpiry( 600 ); |
| 140 | $renderer->addTrackingCategories( $parser ); |
| 141 | return $renderer->getLastError(); |
| 142 | } |
| 143 | $this->hookRunner->onMathFormulaPostRender( |
| 144 | $parser, $renderer, $renderedMath |
| 145 | ); // Enables indexing of math formula |
| 146 | |
| 147 | // Writes cache if rendering was successful |
| 148 | $renderer->writeCache(); |
| 149 | |
| 150 | return $renderedMath; |
| 151 | } |
| 152 | |
| 153 | /** |
| 154 | * @param Parser $parser |
| 155 | * @param string &$text |
| 156 | */ |
| 157 | public function onParserAfterTidy( $parser, &$text ) { |
| 158 | global $wgMathoidCli; |
| 159 | $renderers = array_column( $this->mathLazyRenderBatch, 0 ); |
| 160 | if ( $wgMathoidCli ) { |
| 161 | MathMathMLCli::batchEvaluate( $renderers ); |
| 162 | } else { |
| 163 | MathMathML::batchEvaluate( $renderers ); |
| 164 | } |
| 165 | foreach ( $this->mathLazyRenderBatch as $key => [ $renderer, $renderParser ] ) { |
| 166 | $value = $this->mathPostTagHook( $renderer, $renderParser ); |
| 167 | $count = 0; |
| 168 | $text = str_replace( $key, $value, $text, $count ); |
| 169 | if ( $count ) { |
| 170 | // This hook might be called multiple times. However once the tag is rendered the job is done. |
| 171 | unset( $this->mathLazyRenderBatch[ $key ] ); |
| 172 | } |
| 173 | } |
| 174 | } |
| 175 | |
| 176 | public function onParserOptionsRegister( &$defaults, &$inCacheKey, &$lazyLoad ) { |
| 177 | $defaults['math'] = $this->userOptionsLookup->getDefaultOption( 'math' ); |
| 178 | $inCacheKey['math'] = true; |
| 179 | $lazyLoad['math'] = function ( ParserOptions $options ) { |
| 180 | return MathConfig::normalizeRenderingMode( |
| 181 | $this->userOptionsLookup->getOption( $options->getUserIdentity(), 'math' ) |
| 182 | ); |
| 183 | }; |
| 184 | } |
| 185 | } |