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<?php declare( strict_types = 1 ); namespace Wikimedia\Parsoid\Ext\Gallery; use stdClass; use Wikimedia\Assert\UnreachableException; use Wikimedia\Parsoid\Core\MediaStructure; use Wikimedia\Parsoid\DOM\DocumentFragment; use Wikimedia\Parsoid\DOM\Element; use Wikimedia\Parsoid\DOM\Text; use Wikimedia\Parsoid\Ext\DOMDataUtils; use Wikimedia\Parsoid\Ext\DOMUtils; use Wikimedia\Parsoid\Ext\ExtensionModule; use Wikimedia\Parsoid\Ext\ExtensionTagHandler; use Wikimedia\Parsoid\Ext\ParsoidExtensionAPI; use Wikimedia\Parsoid\Utils\DOMCompat; use Wikimedia\Parsoid\Utils\PHPUtils; use Wikimedia\Parsoid\Utils\WTUtils; /** * Implements the php parser's `renderImageGallery` natively. * * Params to support (on the extension tag): * - showfilename * - caption * - mode * - widths * - heights * - perrow * * A proposed spec is at: https://phabricator.wikimedia.org/P2506 / class Gallery extends ExtensionTagHandler implements ExtensionModule { /* @inheritDoc / public function getConfig(): array { return [ 'name' => 'Gallery', 'tags' => [ [ 'name' => 'gallery', 'handler' => self::class, ] ], ]; } /* * Parse the gallery caption. * @param ParsoidExtensionAPI $extApi * @param array $extArgs * @return ?DocumentFragment / private function pCaption( ParsoidExtensionAPI $extApi, array $extArgs ): ?DocumentFragment { return $extApi->extArgToDOM( $extArgs, 'caption' ); } /* * Parse a single line of the gallery. * @param ParsoidExtensionAPI $extApi * @param string $line * @param int $lineStartOffset * @param Opts $opts * @return ParsedLine\|null / private static function pLine( ParsoidExtensionAPI $extApi, string $line, int $lineStartOffset, Opts $opts ): ?ParsedLine { // Regexp from php's `renderImageGallery` if ( !preg_match( '/^([^\|]+)(\\|(?:.))?$/D', $line, $matches ) ) { return null; } $titleStr = $matches[1]; $imageOptStr = $matches[2] ?? ''; // TODO: % indicates rawurldecode. $mode = Mode::byName( $opts->mode ); $imageOpts = [ "\|{$mode->dimensions( $opts )}", [ $imageOptStr, $lineStartOffset + strlen( $titleStr ) ], ]; $thumb = $extApi->renderMedia( $titleStr, $imageOpts, $error, // Force block for an easier structure to manipulate, otherwise // we have to pull the caption out of the data-mw true ); if ( !$thumb \|\| DOMCompat::nodeName( $thumb ) !== 'figure' ) { return null; } $doc = $thumb->ownerDocument; $rdfaType = $thumb->getAttribute( 'typeof' ) ?? ''; // T214601: Account for a format being set in $imageOptStr $rdfaType = preg_replace( '#mw:File(/\w+)?\b#', 'mw:File', $rdfaType, 1 ); // Detach figcaption as well $figcaption = DOMCompat::querySelector( $thumb, 'figcaption' ); DOMCompat::remove( $figcaption ); if ( $opts->showfilename ) { // No need for error checking on this call since it was already // done in $extApi->renderMedia() above $title = $extApi->makeTitle( $titleStr, $extApi->getSiteConfig()->canonicalNamespaceId( 'file' ) ); $file = $title->getPrefixedDBKey(); $galleryfilename = $doc->createElement( 'a' ); $galleryfilename->setAttribute( 'href', $extApi->getTitleUri( $title ) ); $galleryfilename->setAttribute( 'class', 'galleryfilename galleryfilename-truncate' ); $galleryfilename->setAttribute( 'title', $file ); $galleryfilename->appendChild( $doc->createTextNode( $file ) ); $figcaption->insertBefore( $galleryfilename, $figcaption->firstChild ); } $gallerytext = null; for ( $capChild = $figcaption->firstChild; $capChild !== null; $capChild = $capChild->nextSibling ) { if ( $capChild instanceof Text && preg_match( '/^\s$/D', $capChild->nodeValue ) ) { // skip blank text nodes continue; } // Found a non-blank node! $gallerytext = $figcaption; break; } return new ParsedLine( $thumb, $gallerytext, $rdfaType ); } /* @inheritDoc / public function sourceToDom( ParsoidExtensionAPI $extApi, string $content, array $args ): DocumentFragment { $attrs = $extApi->extArgsToArray( $args ); $opts = new Opts( $extApi, $attrs ); $offset = $extApi->extTag->getOffsets()->innerStart(); // Prepare the lines for processing $lines = explode( "\n", $content ); $lines = array_map( static function ( $line ) use ( &$offset ) { $lineObj = [ 'line' => $line, 'offset' => $offset ]; $offset += strlen( $line ) + 1; // For the nl return $lineObj; }, $lines ); $caption = $opts->caption ? $this->pCaption( $extApi, $args ) : null; $lines = array_map( function ( $lineObj ) use ( $extApi, $opts ) { return $this->pLine( $extApi, $lineObj['line'], $lineObj['offset'], $opts ); }, $lines ); // Drop invalid lines like "References: 5." $lines = array_filter( $lines, static function ( $lineObj ) { return $lineObj !== null; } ); $mode = Mode::byName( $opts->mode ); $extApi->addModules( $mode->getModules() ); $extApi->addModuleStyles( $mode->getModuleStyles() ); return $mode->render( $extApi, $opts, $caption, $lines ); } /* * @param ParsoidExtensionAPI $extApi * @param Element $node * @return string / private function contentHandler( ParsoidExtensionAPI $extApi, Element $node ): string { $content = "\n"; for ( $child = $node->firstChild; $child; $child = $child->nextSibling ) { switch ( $child->nodeType ) { case XML_ELEMENT_NODE: DOMUtils::assertElt( $child ); // Ignore if it isn't a "gallerybox" if ( DOMCompat::nodeName( $child ) !== 'li' \|\| $child->getAttribute( 'class' ) !== 'gallerybox' ) { break; } $thumb = DOMCompat::querySelector( $child, '.thumb' ); if ( !$thumb ) { break; } $gallerytext = DOMCompat::querySelector( $child, '.gallerytext' ); if ( $gallerytext ) { $showfilename = DOMCompat::querySelector( $gallerytext, '.galleryfilename' ); if ( $showfilename ) { DOMCompat::remove( $showfilename ); // Destructive to the DOM! } } $ms = MediaStructure::parse( DOMUtils::firstNonSepChild( $thumb ) ); if ( $ms ) { // FIXME: Dry all this out with T252246 / T262833 if ( $ms->hasResource() ) { $resource = $ms->getResource(); $content .= PHPUtils::stripPrefix( $resource, './' ); // FIXME: Serializing of these attributes should // match the link handler so that values stashed in // data-mw aren't ignored. if ( $ms->hasAlt() ) { $altOnElt = trim( $ms->getAlt() ); $altFromCaption = $gallerytext ? trim( WTUtils::textContentFromCaption( $gallerytext ) ) : ''; // The first condition is to support an empty \alt=\ option // when no caption is present if ( !$altOnElt \|\| ( $altOnElt !== $altFromCaption ) ) { $content .= '\|alt=' . $extApi->escapeWikitext( $altOnElt, $child, $extApi::IN_MEDIA ); } } // FIXME: Handle missing media if ( $ms->hasMediaUrl() && !$ms->isRedLink() ) { $href = $ms->getMediaUrl(); if ( $href !== $resource ) { $href = PHPUtils::stripPrefix( $href, './' ); $content .= '\|link=' . $extApi->escapeWikitext( $href, $child, $extApi::IN_MEDIA ); } } } } else { // TODO: Previously (<=1.5.0), we rendered valid titles // returning mw:Error (apierror-filedoesnotexist) as // plaintext. Continue to serialize this content until // that version is no longer supported. $content .= $thumb->textContent; } if ( $gallerytext ) { $caption = $extApi->domChildrenToWikitext( $gallerytext, $extApi::IN_IMG_CAPTION ); // Drop empty captions if ( !preg_match( '/^\s$/D', $caption ) ) { // Ensure that this only takes one line since gallery // tag content is split by line $caption = str_replace( "\n", ' ', $caption ); $content .= '\|' . $caption; } } $content .= "\n"; break; case XML_TEXT_NODE: case XML_COMMENT_NODE: // Ignore it break; default: throw new UnreachableException( 'should not be here!' ); } } return $content; } /** @inheritDoc / public function domToWikitext( ParsoidExtensionAPI $extApi, Element $node, bool $wrapperUnmodified ) { $dataMw = DOMDataUtils::getDataMw( $node ); $dataMw->attrs = $dataMw->attrs ?? new stdClass; // Handle the "gallerycaption" first $galcaption = DOMCompat::querySelector( $node, 'li.gallerycaption' ); if ( $galcaption && // FIXME: VE should signal to use the HTML by removing the // `caption` from data-mw. !is_string( $dataMw->attrs->caption ?? null ) ) { $dataMw->attrs->caption = $extApi->domChildrenToWikitext( $galcaption, $extApi::IN_IMG_CAPTION \| $extApi::IN_OPTION ); } $startTagSrc = $extApi->extStartTagToWikitext( $node ); if ( !isset( $dataMw->body ) ) { return $startTagSrc; // We self-closed this already. } else { // FIXME: VE should signal to use the HTML by removing the // `extsrc` from the data-mw. if ( is_string( $dataMw->body->extsrc ?? null ) ) { $content = $dataMw->body->extsrc; } else { $content = $this->contentHandler( $extApi, $node ); } return $startTagSrc . $content . '</' . $dataMw->name . '>'; } } /* @inheritDoc / public function modifyArgDict( ParsoidExtensionAPI $extApi, object $argDict ): void { // FIXME: Only remove after VE switches to editing HTML. if ( $extApi->getSiteConfig()->nativeGalleryEnabled() ) { // Remove extsrc from native extensions unset( $argDict->body->extsrc ); // Remove the caption since it's redundant with the HTML // and we prefer editing it there. unset( $argDict->attrs->caption ); } } /* @inheritDoc */ public function diffHandler( ParsoidExtensionAPI $extApi, callable $domDiff, Element $origNode, Element $editedNode ): bool { return call_user_func( $domDiff, $origNode, $editedNode ); } }

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