mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/PageImages
synced 2024-12-04 04:39:09 +00:00
b8c6fd9325
In it, the extension will accept images from galleries as candidates for page images. Core dependency: I3136d648ef2c1841767db0ab33855cd168e3de3e Bug: 66510 Change-Id: I64e997d58e4a1b66a8a351d85a3e7df1a77354e9
405 lines
11 KiB
PHP
405 lines
11 KiB
PHP
<?php
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class PageImages {
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/**
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* Page property used to store the page image information
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*/
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const PROP_NAME = 'page_image';
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/**
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* Returns page image for a given title
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*
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* @param Title $title: Title to get page image for
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*
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* @return File|bool
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*/
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public static function getPageImage( Title $title ) {
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wfProfileIn( __METHOD__ );
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$dbr = wfGetDB( DB_SLAVE );
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$name = $dbr->selectField( 'page_props',
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'pp_value',
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array( 'pp_page' => $title->getArticleID(), 'pp_propname' => self::PROP_NAME ),
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__METHOD__
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);
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$file = false;
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if ( $name ) {
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$file = wfFindFile( $name );
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}
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wfProfileOut( __METHOD__ );
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return $file;
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}
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/**
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* Returns true if data for this title should be saved
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*
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* @param Title $title
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* @return bool
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*/
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private static function processThisTitle( Title $title ) {
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static $flipped = false;
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if ( $flipped === false ) {
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global $wgPageImagesNamespaces;
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$flipped = array_flip( $wgPageImagesNamespaces );
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}
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return isset( $flipped[$title->getNamespace()] );
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}
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/**
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* ParserMakeImageParams hook handler, saves extended information about images used on page
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* @see https://www.mediawiki.org/wiki/Manual:Hooks/ParserMakeImageParams
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* @param Title $title
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* @param File|bool $file
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* @param array $params
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* @param Parser $parser
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* @return bool
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*/
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public static function onParserMakeImageParams( Title $title, $file, array &$params, Parser $parser ) {
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self::processFile( $parser, $file, $params );
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return true;
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}
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/**
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* AfterParserFetchFileAndTitle hook handler, saves information about gallery images
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* @param Parser $parser
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* @param ImageGalleryBase $ig
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* @return bool
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*/
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public static function onAfterParserFetchFileAndTitle( Parser $parser, ImageGalleryBase $ig ) {
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foreach ( $ig->getImages() as $image ) {
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self::processFile( $parser, $image[0], null );
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}
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return true;
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}
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/**
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* @param Parser $parser
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* @param File|Title|null $file
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* @param array|null $handlerParams
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*/
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private static function processFile( Parser $parser, $file, $handlerParams ) {
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if ( !$file || !self::processThisTitle( $parser->getTitle() ) ) {
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return;
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}
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if ( !$file instanceof File ) {
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$file = wfFindFile( $file );
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if ( !$file ) {
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return;
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}
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}
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$out = $parser->getOutput();
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if ( !isset( $out->pageImages ) ) {
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$out->pageImages = array();
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}
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if ( is_array( $handlerParams ) ) {
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$myParams = $handlerParams;
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self::calcWidth( $myParams, $file );
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} else {
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$myParams = array();
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}
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$myParams['filename'] = $file->getTitle()->getDBkey();
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$myParams['fullwidth'] = $file->getWidth();
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$myParams['fullheight'] = $file->getHeight();
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$out->pageImages[] = $myParams;
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}
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/**
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* Estimates image size as displayed if not explicitly provided.
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* We don't follow the core size calculation algorithm precisely because it's not required and editor's
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* intentions are more important than the precise number.
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*
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* @param array $params
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* @param File $file
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*/
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private static function calcWidth( array &$params, File $file ) {
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global $wgThumbLimits, $wgDefaultUserOptions;
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if ( isset( $params['handler']['width'] ) ) {
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return;
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}
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if ( isset( $params['handler']['height'] ) && $file->getHeight() > 0 ) {
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$params['handler']['width'] =
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$file->getWidth() * ( $params['handler']['height'] / $file->getHeight() );
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} elseif ( isset( $params['frame']['thumbnail'] )
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|| isset( $params['frame']['thumb'] )
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|| isset( $params['frame']['frameless'] ) )
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{
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$params['handler']['width'] = isset( $wgThumbLimits[$wgDefaultUserOptions['thumbsize']] )
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? $wgThumbLimits[$wgDefaultUserOptions['thumbsize']]
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: 250;
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} else {
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$params['handler']['width'] = $file->getWidth();
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}
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}
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/**
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* LinksUpdate hook handler, sets at most 2 page properties depending on images on page
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* @see https://www.mediawiki.org/wiki/Manual:Hooks/LinksUpdate
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* @param LinksUpdate $lu
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* @return bool
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*/
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public static function onLinksUpdate( LinksUpdate $lu ) {
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if ( !isset( $lu->getParserOutput()->pageImages ) ) {
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return true;
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}
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wfProfileIn( __METHOD__ );
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$images = $lu->getParserOutput()->pageImages;
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$scores = array();
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$counter = 0;
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foreach ( $images as $image ) {
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$fileName = $image['filename'];
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if ( !isset( $scores[$fileName] ) ) {
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$scores[$fileName] = -1;
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}
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$scores[$fileName] = max( $scores[$fileName], self::getScore( $image, $counter++ ) );
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}
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$image = false;
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foreach ( $scores as $name => $score ) {
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if ( $score > 0 && ( !$image || $score > $scores[$image] ) ) {
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$image = $name;
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}
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}
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if ( $image ) {
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$lu->mProperties[self::PROP_NAME] = $image;
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}
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wfProfileOut( __METHOD__ );
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return true;
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}
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/**
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* InfoAction hook handler, adds the page image to the info=action page
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* @see https://www.mediawiki.org/wiki/Manual:Hooks/InfoAction
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* @param IContextSource $context
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* @param array $pageInfo
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* @return bool
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*/
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public static function onInfoAction( IContextSource $context, &$pageInfo ) {
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global $wgDefaultUserOptions, $wgThumbLimits;
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wfProfileIn( __METHOD__ );
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$imageFile = self::getPageImage( $context->getTitle() );
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if ( !$imageFile ) {
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// The page has no image
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wfProfileOut( __METHOD__ );
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return true;
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}
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$thumbSetting = $context->getUser()->getOption(
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'thumbsize',
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$wgDefaultUserOptions['thumbsize']
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);
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$thumbSize = $wgThumbLimits[$thumbSetting];
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$thumb = $imageFile->transform( array( 'width' => $thumbSize ) );
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if ( !$thumb ) {
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wfProfileOut( __METHOD__ );
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return true;
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}
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$imageHtml = $thumb->toHtml(
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array(
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'alt' => $imageFile->getTitle()->getText(),
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'desc-link' => true,
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)
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);
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$pageInfo['header-basic'][] = array(
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$context->msg( 'pageimages-info-label' ),
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$imageHtml
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);
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wfProfileOut( __METHOD__ );
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return true;
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}
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/**
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* OpenSearchXml hook handler, enhances Extension:OpenSearchXml results with this extension's data
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* @param array $results
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* @return bool
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*/
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public static function onOpenSearchXml( &$results ) {
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global $wgPageImagesExpandOpenSearchXml;
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if ( !$wgPageImagesExpandOpenSearchXml || !count( $results ) ) {
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return true;
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}
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wfProfileIn( __METHOD__ );
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$pageIds = array_keys( $results );
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$api = new ApiMain(
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new FauxRequest( array(
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'action' => 'query',
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'prop' => 'pageimages',
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'piprop' => 'thumbnail',
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'pageids' => implode( '|', $pageIds ),
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'pilimit' => count( $results ),
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) )
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);
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$api->execute();
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$data = $api->getResultData();
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foreach ( $pageIds as $id ) {
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if ( isset( $data['query']['pages'][$id]['thumbnail'] ) ) {
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$results[$id]['image'] = $data['query']['pages'][$id]['thumbnail'];
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} else {
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$results[$id]['image'] = null;
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}
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}
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wfProfileOut( __METHOD__ );
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return true;
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}
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/**
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* Returns score for image, the more the better, if it is less than zero,
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* the image shouldn't be used for anything
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* @param array $image: Associative array describing an image
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* @param int $position: Image order on page
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* @return int
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*/
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private static function getScore( array $image, $position ) {
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global $wgPageImagesScores;
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if ( isset( $image['handler'] ) ) {
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// Standalone image
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$score = self::scoreFromTable( $image['handler']['width'], $wgPageImagesScores['width'] );
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} else {
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// From gallery
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$score = self::scoreFromTable( $image['fullwidth'], $wgPageImagesScores['galleryImageWidth'] );
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}
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if ( isset( $wgPageImagesScores['position'][$position] ) ) {
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$score += $wgPageImagesScores['position'][$position];
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}
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$ratio = intval( self::getRatio( $image ) * 10 );
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$score += self::scoreFromTable( $ratio, $wgPageImagesScores['ratio'] );
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$blacklist = self::getBlacklist();
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if ( isset( $blacklist[$image['filename']] ) ) {
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$score = -1000;
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}
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return $score;
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}
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/**
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* Returns width/height ratio of an image as displayed or 0 is not available
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*
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* @param array $image
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* @return int
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*/
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private static function getRatio( array $image ) {
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$width = $image['fullwidth'];
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$height = $image['fullheight'];
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if ( !$width || !$height ) {
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return 0;
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}
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return $width / $height;
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}
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/**
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* Returns score based on table of ranges
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*
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* @param int|float $value
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* @param array $scores
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* @return int
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*/
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private static function scoreFromTable( $value, array $scores ) {
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$lastScore = 0;
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foreach ( $scores as $boundary => $score ) {
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if ( $value <= $boundary ) {
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return $score;
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}
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$lastScore = $score;
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}
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return $lastScore;
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}
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/**
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* Returns a list of images blacklisted from influencing this extension's output
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* @return array: Flipped associative array in format "image BDB key" => int
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*/
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private static function getBlacklist() {
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global $wgPageImagesBlacklist, $wgPageImagesBlacklistExpiry, $wgMemc;
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static $list = false;
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if ( $list !== false ) {
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return $list;
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}
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wfProfileIn( __METHOD__ );
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$key = wfMemcKey( 'pageimages', 'blacklist' );
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$list = $wgMemc->get( $key );
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if ( $list !== false ) {
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wfProfileOut( __METHOD__ );
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return $list;
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}
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wfDebug( __METHOD__ . "(): cache miss\n" );
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$list = array();
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foreach ( $wgPageImagesBlacklist as $source ) {
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switch ( $source['type'] ) {
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case 'db':
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$list = array_merge( $list, self::getDbBlacklist( $source['db'], $source['page'] ) );
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break;
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case 'url':
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$list = array_merge( $list, self::getUrlBlacklist( $source['url'] ) );
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break;
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default:
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throw new MWException( __METHOD__ . "(): unrecognized image blacklist type '{$source['type']}'" );
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}
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}
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$list = array_flip( $list );
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$wgMemc->set( $key, $list, $wgPageImagesBlacklistExpiry );
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wfProfileOut( __METHOD__ );
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return $list;
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}
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/**
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* Returns list of images linked by the given blacklist page
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* @param string|int $dbName: Database name or false for current database
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* @param string $page
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* @return array
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*/
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private static function getDbBlacklist( $dbName, $page ) {
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wfProfileIn( __METHOD__ );
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$dbr = wfGetDB( DB_SLAVE, array(), $dbName );
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$title = Title::newFromText( $page );
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$list = array();
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$id = $dbr->selectField( 'page',
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'page_id',
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array( 'page_namespace' => $title->getNamespace(), 'page_title' => $title->getDBkey() ),
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__METHOD__
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);
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if ( $id ) {
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$res = $dbr->select( 'pagelinks',
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'pl_title',
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array( 'pl_from' => $id, 'pl_namespace' => NS_FILE ),
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__METHOD__
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);
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foreach ( $res as $row ) {
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$list[] = $row->pl_title;
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}
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}
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wfProfileOut( __METHOD__ );
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return $list;
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}
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/**
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* Returns list of images on given remote blacklist page.
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* Not quite 100% bulletproof due to localised namespaces and so on.
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* Though if you beat people if they add bad entries to the list... :)
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* @param string $url
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* @return array
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*/
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private static function getUrlBlacklist( $url ) {
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global $wgFileExtensions;
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wfProfileIn( __METHOD__ );
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$list = array();
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$text = Http::get( $url, 3 );
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$regex = '/\[\[:([^|\#]*?\.(?:' . implode( '|', $wgFileExtensions ) . '))/i';
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if ( $text && preg_match_all( $regex, $text, $matches ) ) {
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foreach ( $matches[1] as $s ) {
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$t = Title::makeTitleSafe( NS_FILE, $s );
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if ( $t ) {
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$list[] = $t->getDBkey();
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}
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}
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}
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wfProfileOut( __METHOD__ );
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return $list;
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}
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}
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