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<?php /** * Base class for the output of file transformation methods. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * http://www.gnu.org/copyleft/gpl.html * * @file * @ingroup Media */ use MediaWiki\HookContainer\HookRunner; use MediaWiki\Html\Html; use MediaWiki\MainConfigNames; use MediaWiki\MediaWikiServices; use MediaWiki\Title\Title; use MediaWiki\Xml\Xml; /** * Media transform output for images * * @ingroup Media */ class ThumbnailImage extends MediaTransformOutput { /** * Get a thumbnail object from a file and parameters. * If $path is set to null, the output file is treated as a source copy. * If $path is set to false, no output file will be created. * $parameters should include, as a minimum, (file) 'width' and 'height'. * It may also include a 'page' parameter for multipage files. * * @param File $file * @param string $url URL path to the thumb * @param string|null|false $path Filesystem path to the thumb * @param array $parameters Associative array of parameters */ public function __construct( $file, $url, $path = false, $parameters = [] ) { // Previous parameters: // $file, $url, $width, $height, $path = false, $page = false $defaults = [ 'page' => false, 'lang' => false ]; if ( is_array( $parameters ) ) { $actualParams = $parameters + $defaults; } else { // Using old format, should convert. Later a warning could be added here. $numArgs = func_num_args(); $actualParams = [ 'width' => $path, 'height' => $parameters, 'page' => ( $numArgs > 5 ) ? func_get_arg( 5 ) : false ] + $defaults; $path = ( $numArgs > 4 ) ? func_get_arg( 4 ) : false; } $this->file = $file; $this->url = $url; $this->path = $path; // These should be integers when they get here. // If not, there's a bug somewhere. But let's at // least produce valid HTML code regardless. // @phan-suppress-next-line PhanTypeMismatchArgumentInternal Confused by old signature $this->width = (int)round( $actualParams['width'] ); $this->height = (int)round( $actualParams['height'] ); $this->page = $actualParams['page']; $this->lang = $actualParams['lang']; } /** * Return HTML <img ... /> tag for the thumbnail, will include * width and height attributes and a blank alt text (as required). * * @param array $options Associative array of options. Boolean options * should be indicated with a value of true for true, and false or * absent for false. * * alt HTML alt attribute * title HTML title attribute * desc-link Boolean, show a description link * file-link Boolean, show a file download link * valign vertical-align property, if the output is an inline element * img-class Class applied to the \<img\> tag, if there is such a tag * loading Specify an explicit browser loading strategy for images and iframes. * desc-query String, description link query params * override-width Override width attribute. Should generally not set * override-height Override height attribute. Should generally not set * no-dimensions Boolean, skip width and height attributes (useful if * set in CSS) * custom-url-link Custom URL to link to * custom-title-link Custom Title object to link to * custom-title-link-query Querystring parameters array, for custom-title-link * custom-target-link Value of the target attribute, for custom-url-link * parser-extlink-* Attributes added by parser for external links: * parser-extlink-rel: add rel="nofollow" * parser-extlink-target: link target, but overridden by custom-target-link * magnify-resource To set the HTML resource attribute, when necessary * * For images, desc-link and file-link are implemented as a click-through. For * sounds and videos, they may be displayed in other ways. * * @return string */ public function toHtml( $options = [] ) { $services = MediaWikiServices::getInstance(); $mainConfig = $services->getMainConfig(); $nativeImageLazyLoading = $mainConfig->get( MainConfigNames::NativeImageLazyLoading ); $enableLegacyMediaDOM = $mainConfig->get( MainConfigNames::ParserEnableLegacyMediaDOM ); if ( func_num_args() === 2 ) { throw new InvalidArgumentException( __METHOD__ . ' called in the old style' ); } $query = $options['desc-query'] ?? ''; $attribs = []; // An empty alt indicates an image is not a key part of the content and // that non-visual browsers may omit it from rendering. Only set the // parameter if it's explicitly requested. if ( isset( $options['alt'] ) ) { $attribs['alt'] = $options['alt']; } // Description links get the mw-file-description class and link // to the file description page, making the resource redundant if ( !$enableLegacyMediaDOM && isset( $options['magnify-resource'] ) && !( $options['desc-link'] ?? false ) ) { $attribs['resource'] = $options['magnify-resource']; } $attribs += [ 'src' => $this->url, 'decoding' => 'async', ]; if ( $options['loading'] ?? $nativeImageLazyLoading ) { $attribs['loading'] = $options['loading'] ?? 'lazy'; } if ( !empty( $options['custom-url-link'] ) ) { $linkAttribs = [ 'href' => $options['custom-url-link'] ]; if ( !empty( $options['title'] ) ) { $linkAttribs['title'] = $options['title']; } if ( !empty( $options['custom-target-link'] ) ) { $linkAttribs['target'] = $options['custom-target-link']; } elseif ( !empty( $options['parser-extlink-target'] ) ) { $linkAttribs['target'] = $options['parser-extlink-target']; } if ( !empty( $options['parser-extlink-rel'] ) ) { $linkAttribs['rel'] = $options['parser-extlink-rel']; } } elseif ( !empty( $options['custom-title-link'] ) ) { /** @var Title $title */ $title = $options['custom-title-link']; $linkAttribs = [ 'href' => $title->getLinkURL( $options['custom-title-link-query'] ?? null ), 'title' => empty( $options['title'] ) ? $title->getPrefixedText() : $options['title'] ]; } elseif ( !empty( $options['desc-link'] ) ) { $linkAttribs = $this->getDescLinkAttribs( empty( $options['title'] ) ? null : $options['title'], $query ); } elseif ( !empty( $options['file-link'] ) ) { $linkAttribs = [ 'href' => $this->file->getUrl() ]; } else { $linkAttribs = false; if ( !empty( $options['title'] ) ) { if ( $enableLegacyMediaDOM ) { $attribs['title'] = $options['title']; } else { $linkAttribs = [ 'title' => $options['title'] ]; } } } if ( empty( $options['no-dimensions'] ) ) { $attribs['width'] = $this->width; $attribs['height'] = $this->height; } if ( !empty( $options['valign'] ) ) { $attribs['style'] = "vertical-align: {$options['valign']}"; } if ( !empty( $options['img-class'] ) ) { $attribs['class'] = $options['img-class']; } if ( isset( $options['override-height'] ) ) { $attribs['height'] = $options['override-height']; } if ( isset( $options['override-width'] ) ) { $attribs['width'] = $options['override-width']; } // Additional densities for responsive images, if specified. // If any of these urls is the same as src url, it'll be excluded. $responsiveUrls = array_diff( $this->responsiveUrls, [ $this->url ] ); if ( $responsiveUrls ) { $attribs['srcset'] = Html::srcSet( $responsiveUrls ); } ( new HookRunner( $services->getHookContainer() ) ) ->onThumbnailBeforeProduceHTML( $this, $attribs, $linkAttribs ); return $this->linkWrap( $linkAttribs, Xml::element( 'img', $attribs ) ); } }
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