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<?php /** * * @license MIT * @file * * @author Dan Andreescu, Yuri Astrakhan, Frédéric Bolduc, Joseph Seddon, Isabelle Hurbain-Palatin */ namespace Graph; use MediaWiki\Html\Html; use MediaWiki\Json\FormatJson; use MediaWiki\Language\Language; use MediaWiki\Linker\Linker; use MediaWiki\MediaWikiServices; use MediaWiki\Message\Message; use MediaWiki\Output\OutputPage; use MediaWiki\Page\PageReference; use MediaWiki\Parser\Parser; use MediaWiki\Parser\ParserOptions; use MediaWiki\Parser\ParserOutput; use MediaWiki\Parser\PPFrame; use MediaWiki\Status\Status; use MediaWiki\Title\Title; class ParserTag { /** Sync with mapSchema.js */ private const DEFAULT_WIDTH = 500; private const DEFAULT_HEIGHT = 500; /** @var ParserOptions */ private $parserOptions; /** @var ParserOutput */ private $parserOutput; /** @var Language */ private $language; /** * @param Parser $parser * @param ParserOptions $parserOptions * @param ParserOutput $parserOutput */ public function __construct( Parser $parser, ParserOptions $parserOptions, ParserOutput $parserOutput ) { $this->parserOptions = $parserOptions; $this->parserOutput = $parserOutput; $this->language = $parser->getTargetLanguage(); } /** * <graph> parser tag handler. * @param string|null $input * @param array $args * @param Parser $parser * @param PPFrame $frame * @return string */ public static function onGraphTag( $input, array $args, Parser $parser, PPFrame $frame ) { $tag = new self( $parser, $parser->getOptions(), $parser->getOutput() ); $html = $tag->buildHtml( (string)$input, $parser->getRevisionId(), $args ); self::addTagMetadata( $parser->getOutput(), $parser->getPage(), $parser->getOptions()->getIsPreview() ); return $html; } /** * - Add tracking categories * - Split parser cache for preview, where Graph uses different HTML * @param ParserOutput $parserOutput * @param ?PageReference $pageRef * @param bool $isPreview */ public static function addTagMetadata( ParserOutput $parserOutput, ?PageReference $pageRef, bool $isPreview ): void { $tc = MediaWikiServices::getInstance()->getTrackingCategories(); if ( $parserOutput->getExtensionData( 'graph_specs_broken' ) ) { $tc->addTrackingCategory( $parserOutput, 'graph-broken-category', $pageRef ); } if ( $parserOutput->getExtensionData( 'graph_specs_obsolete' ) ) { $tc->addTrackingCategory( $parserOutput, 'graph-obsolete-category', $pageRef ); } $specs = $parserOutput->getExtensionData( 'graph_specs_index' ); if ( $specs === null ) { return; } $tc->addTrackingCategory( $parserOutput, 'graph-tracking-category', $pageRef ); if ( $isPreview ) { $parserOutput->updateCacheExpiry( 0 ); } } /** * Called on OutputPageParserOutput, handles initializing the client-side logic based on * the graph data collected in the ParserOutput. * @param OutputPage $outputPage * @param ParserOutput $parserOutput */ public static function finalizeParserOutput( OutputPage $outputPage, ParserOutput $parserOutput ): void { $specs = $parserOutput->getExtensionData( 'graph_specs_index' ); if ( $specs === null ) { return; } $outputPage->addModuleStyles( [ 'ext.graph.styles' ] ); // We can only load one version of vega lib - either 1 or 2 // If the default version is 1, and if any of the graphs need Vega2, // we treat all graphs as Vega2 and load corresponding libraries. // All this should go away once we drop Vega1 support. $liveSpecsIndex = $parserOutput->getExtensionData( 'graph_live_specs_index' ); $outputPage->addModules( [ 'ext.graph.loader' ] ); $liveSpecs = []; foreach ( $liveSpecsIndex as $hash => $ignore ) { $liveSpecs[$hash] = $parserOutput->getExtensionData( 'graph_live_specs[' . $hash . ']' ); } $outputPage->addJsConfigVars( 'wgGraphSpecs', $liveSpecs ); } /** * @param string $mode lazyload|interactable(click to load)|always(live)|'' * @param mixed $data * @param string $hash * @return array */ public static function buildDivAttributes( $mode = '', $data = false, $hash = '' ) { $attribs = [ 'class' => 'mw-graph mw-graph-clickable' ]; if ( is_object( $data ) ) { $width = property_exists( $data, 'width' ) && is_int( $data->width ) ? $data->width : self::DEFAULT_WIDTH; $height = property_exists( $data, 'height' ) && is_int( $data->height ) ? $data->height : self::DEFAULT_HEIGHT; if ( $width && $height ) { $attribs['style'] = "width:{$width}px;height:{$height}px;aspect-ratio:$width/$height"; } } if ( $mode ) { $attribs['class'] .= ' mw-graph-' . $mode; } if ( $hash ) { $attribs['data-graph-id'] = $hash; } return $attribs; } /** * @param Message $msg * @return string */ private function formatError( Message $msg ) { $this->parserOutput->setExtensionData( 'graph_specs_broken', true ); $error = $msg->inLanguage( $this->language )->parse(); return "<span class=\"error\">{$error}</span>"; } /** * @param Status $status * @return string */ private function formatStatus( Status $status ) { return $this->formatError( $status->getMessage( false, false, $this->language ) ); } /** * Generate HTML output for the <graph> parser tag. * On error, outputs an error message. On success, outputs an empty div with the Vega * specification's sha1 hash in its 'data-graph-id' attribute. * Sets the following keys in the ParserOutput extension data: * - graph_vega2 and graph_specs_obsolete: there is at least one Vega 2 graph on the page * - graph_vega5: there is at least one Vega 5 graph on the page * - graph_specs_index: a list of all Vega spec hashes * - graph_specs[<hash>]: the Vega spec whose sha1 hash is <hash> (note the hash and brackets * are literally part of the key) * - graph_live_specs_index and graph_live_specs[<hash>]: same thing but for graphs shown * during page preview. * @param string $jsonText <graph> tag contents; expected to be a JSON Vega definition. * @param int $revid * @param array|null $args <graph> tag attributes: * title: no longer used? * fallback: title of a fallback image for noscript * fallbackWidth: width of the fallback image * fallbackHeight: height of the fallback image * @return string */ public function buildHtml( $jsonText, $revid, $args = null ) { $jsonText = trim( $jsonText ); if ( $jsonText === '' ) { return $this->formatError( wfMessage( 'graph-error-empty-json' ) ); } $status = FormatJson::parse( $jsonText, FormatJson::TRY_FIXING | FormatJson::STRIP_COMMENTS ); if ( !$status->isOK() ) { return $this->formatStatus( $status ); } $data = $status->getValue(); if ( !is_object( $data ) ) { return $this->formatError( wfMessage( 'graph-error-not-vega' ) ); } // Figure out which vega version to use (TODO drop this) global $wgGraphDefaultVegaVer; if ( property_exists( $data, '$schema' ) ) { if ( !preg_match( // https://vega.github.io/schema/ '!https://vega.github.io/schema/(vega|vega-lite)/v(\d)(?:\.\d){0,2}.json!', $data->{'$schema'}, $matches ) ) { return $this->formatError( wfMessage( 'graph-error-not-vega' ) ); } elseif ( $matches[1] === 'vega-lite' ) { return $this->formatError( wfMessage( 'graph-error-vega-lite-unsupported' ) ); } $version = (int)$matches[2]; } elseif ( property_exists( $data, 'version' ) && is_numeric( $data->version ) ) { $version = $data->version; } else { $version = $data->version = $wgGraphDefaultVegaVer; } if ( $version === 2 ) { $this->parserOutput->setExtensionData( 'graph_vega2', true ); $this->parserOutput->setExtensionData( 'graph_specs_obsolete', true ); } elseif ( $version === 5 ) { $this->parserOutput->setExtensionData( 'graph_vega5', true ); } else { return $this->formatError( wfMessage( 'graph-error-vega-unsupported-version', $version ) ); } // Make sure that multiple json blobs that only differ in spacing hash the same $hash = sha1( FormatJson::encode( $data, false, FormatJson::ALL_OK ) ); // graph_specs is used in ApiGraph; graph_specs_index is also used to set up the // graph tracking category and to gate finalizeParserOutput (we only check whether it's // null or not in those two instances) // TODO: consider merging graph_specs and graph_live_specs to a unique "array" instead of 2 $this->parserOutput->appendExtensionData( 'graph_specs_index', $hash ); $this->parserOutput->setExtensionData( 'graph_specs[' . $hash . ']', $data ); // Switching this to false (lazyload), will break cache $alwaysMode = true; /* @phan-suppress-next-line PhanRedundantCondition */ if ( $this->parserOptions->getIsPreview() || $alwaysMode ) { $this->parserOutput->appendExtensionData( 'graph_live_specs_index', $hash ); $this->parserOutput->setExtensionData( 'graph_live_specs[' . $hash . ']', $data ); $attribs = self::buildDivAttributes( 'always', $data, $hash ); } else { $attribs = self::buildDivAttributes( 'lazyload', $data, $hash ); } $isFallback = isset( $args[ 'fallback' ] ) && $args[ 'fallback' ] !== ''; if ( $isFallback ) { global $wgThumbLimits, $wgDefaultUserOptions; /* @phan-suppress-next-line PhanTypeArraySuspiciousNullable */ $fallbackArgTitle = $args[ 'fallback' ]; $services = MediaWikiServices::getInstance(); $fallbackParser = $services->getParser(); $title = Title::makeTitle( NS_FILE, $fallbackArgTitle ); $file = $services->getRepoGroup()->findFile( $title ); $imgFallbackParams = []; if ( isset( $args[ 'fallbackWidth' ] ) && $args[ 'fallbackWidth' ] > 0 ) { $width = $args[ 'fallbackWidth' ]; $imgFallbackParams[ 'width' ] = $width; } elseif ( property_exists( $data, 'width' ) ) { $width = is_int( $data->width ) ? $data->width : 0; $imgFallbackParams[ 'width' ] = $width; } else { $imgFallbackParams[ 'width' ] = $wgThumbLimits[ $wgDefaultUserOptions[ 'thumbsize' ] ]; } $imgFallback = Linker::makeImageLink( $fallbackParser, $title, $file, [ '' ], $imgFallbackParams ); $noSriptAttrs = [ 'class' => 'mw-graph-noscript', ]; // $html will be injected with a <canvas> tag $html = Html::rawElement( 'noscript', $noSriptAttrs, $imgFallback ); } else { $attribs[ 'class' ] .= ' mw-graph-nofallback'; $html = ''; } return Html::rawElement( 'div', $attribs, $html ); } }
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