ParserFileProcessingHookHandlers.php

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<?php
 
namespace PageImages\Hooks;
 
use File;
use ImageGalleryBase;
use Parser;
use Title;
 
class ParserFileProcessingHookHandlers {
 
    public static function onParserMakeImageParams(
        Title $title,
        $file,
        array &$params,
        Parser $parser
    ) {
        $handler = new self();
        $handler->doParserMakeImageParams( $title, $file, $params, $parser );
    }
 
    public static function onAfterParserFetchFileAndTitle(
        Parser $parser, ImageGalleryBase $gallery
    ) {
        $handler = new self();
        $handler->doAfterParserFetchFileAndTitle( $parser, $gallery );
    }
 
    public function doParserMakeImageParams(
        Title $title,
        $file,
        array &$params,
        Parser $parser
    ) {
        $this->processFile( $parser, $file, $params );
    }
 
    public function doAfterParserFetchFileAndTitle( Parser $parser, ImageGalleryBase $gallery ) {
        foreach ( $gallery->getImages() as $image ) {
            $this->processFile( $parser, $image[0], null );
        }
    }
 
    private function processFile( Parser $parser, $file, $handlerParams ) {
        if ( !$file || !$this->processThisTitle( $parser->getTitle() ) ) {
            return;
        }
 
        if ( !( $file instanceof File ) ) {
            $file = wfFindFile( $file );
            // Non-image files (e.g. audio files) from a <gallery> can end here
            if ( !$file || !$file->canRender() ) {
                return;
            }
        }
 
        if ( is_array( $handlerParams ) ) {
            $myParams = $handlerParams;
            $this->calcWidth( $myParams, $file );
        } else {
            $myParams = [];
        }
 
        $myParams['filename'] = $file->getTitle()->getDBkey();
        $myParams['fullwidth'] = $file->getWidth();
        $myParams['fullheight'] = $file->getHeight();
 
        $out = $parser->getOutput();
        $pageImages = $out->getExtensionData( 'pageImages' ) ?: [];
        $pageImages[] = $myParams;
        $out->setExtensionData( 'pageImages', $pageImages );
    }
 
    private function processThisTitle( Title $title ) {
        global $wgPageImagesNamespaces;
        static $flipped = false;
 
        if ( $flipped === false ) {
            $flipped = array_flip( $wgPageImagesNamespaces );
        }
 
        return isset( $flipped[$title->getNamespace()] );
    }
 
    private function calcWidth( array &$params, File $file ) {
        global $wgThumbLimits, $wgDefaultUserOptions;
 
        if ( isset( $params['handler']['width'] ) ) {
            return;
        }
 
        if ( isset( $params['handler']['height'] ) && $file->getHeight() > 0 ) {
            $params['handler']['width'] =
                $file->getWidth() * ( $params['handler']['height'] / $file->getHeight() );
        } elseif ( isset( $params['frame']['thumbnail'] )
            || isset( $params['frame']['thumb'] )
            || isset( $params['frame']['frameless'] )
        ) {
            $params['handler']['width'] = $wgThumbLimits[$wgDefaultUserOptions['thumbsize']]
                ?? 250;
        } else {
            $params['handler']['width'] = $file->getWidth();
        }
    }
 
}