SlimboxThumbs.php

<?php

/**
 * SlimboxThumbs extension /REWRITTEN/
 * Originally https://www.mediawiki.org/wiki/Extension:SlimboxThumbs
 * Now it does the same, but the code is totally different
 * Required MediaWiki: 1.13+
 *
 * This extension includes a copy of Slimbox.
 * It has one small modification: caption is animated together
 * with image container, instead of original annoying consecutive animation.
 * Also "autoloader" is removed from slimbox2.js, and there is an additional
 * slimboxthumbs.js file.
 *
 * You can however get your own copy of Slimbox and use it by replacing the
 * included one: http://www.digitalia.be/software/slimbox2
 *
 * @license GNU GPL 3.0 or later: http://www.gnu.org/licenses/gpl.html
 * CC-BY-SA should not be used for software, moreover it's incompatible with GPL, and MW is GPL.
 *
 * @file SlimboxThumbs.php
 *
 * @author Vitaliy Filippov <vitalif@mail.ru>
 */

use MediaWiki\MediaWikiServices;

if ( !defined( 'MEDIAWIKI' ) ) {
	die( 'Not an entry point.' );
}

define( 'SlimboxThumbs_VERSION', '2014-04-01' );

// Register the extension credits.
$wgExtensionCredits['other'][] = array(
	'path' => __FILE__,
	'name' => 'SlimboxThumbs',
	'url' => 'https://www.mediawiki.org/wiki/Extension:SlimboxThumbs',
	'author' => array(
		'[http://yourcmc.ru/wiki/User:VitaliyFilippov Vitaliy Filippov], ' .
		'[https://www.mediawiki.org/wiki/User:Jeroen_De_Dauw Jeroen De Dauw].'
	),
	'descriptionmsg' => 'slimboxthumbs-desc',
	'version' => SlimboxThumbs_VERSION,
);

$dir = dirname( __FILE__ ) . '/';
$wgMessagesDirs['SlimboxThumbs'] = __DIR__ . '/i18n';
$wgHooks['BeforePageDisplay'][] = 'efSBTAddScripts';
$wgAjaxExportList[] = 'efSBTGetImageSizes';
$wgAjaxExportList[] = 'efSBTRemoteThumb';

$wgResourceModules += array(
	'ext.slimboxthumbs' => [
		'scripts' => [
			'js/slimbox2.js',
			'slimboxthumbs.js',
		],
		'styles' => 'css/slimbox2.css',
		'localBasePath' => __DIR__ . '/slimbox',
		'remoteExtPath' => 'SlimboxThumbs/slimbox',
] );

// Ajax handler to get image sizes
function efSBTGetImageSizes( $names ) {
	$result = array();
	$user = RequestContext::getMain()->getUser();
	foreach ( explode( ':', $names ) as $name ) {
		if ( !isset( $result[$name] ) ) {
			$title = Title::makeTitle( NS_FILE, $name );
			if ( $title ) {
				if ( class_exists( 'MediaWiki\Permissions\PermissionManager' ) ) {
					// MW 1.33+
					$userCan = \MediaWiki\MediaWikiServices::getInstance()
						->getPermissionManager()
						->userCan( 'read', $user, $title );
				} else {
					$userCan = $title->userCan( 'read' );
				}
				if ( $userCan ) {
					if ( method_exists( MediaWikiServices::class, 'getRepoGroup' ) ) {
						// MediaWiki 1.34+
						$file = MediaWikiServices::getInstance()->getRepoGroup()->findFile( $title );
					} else {
						$file = wfFindFile( $title );
					}
					if ( $file && $file->getWidth() ) {
						$result[ $name ] = array(
							'width' => $file->getWidth(),
							'height' => $file->getHeight(),
							'url' => $file->getFullUrl(),
							'local' => $file->isLocal(),
						);
					}
				}
			}
		}
	}
	return json_encode( $result );
}

// Not really an AJAX function, used to generate thumbnails for non-local images.
// Needed because thumb.php only handles local images.
function efSBTRemoteThumb( $name, $width ) {
	if ( method_exists( MediaWikiServices::class, 'getRepoGroup' ) ) {
		// MediaWiki 1.34+
		$img = MediaWikiServices::getInstance()->getRepoGroup()->findFile( $name );
	} else {
		$img = wfFindFile( $name );
	}
	if ( $img && $img->exists() && !$img->isLocal() ) {
		if ( class_exists( 'MediaWiki\Permissions\PermissionManager' ) ) {
			// MW 1.33+
			$user = RequestContext::getMain()->getUser();
			$userCan = \MediaWiki\MediaWikiServices::getInstance()
				->getPermissionManager()
				->userCan( 'read', $user, $img->getTitle() );
		} else {
			$userCan = $img->getTitle()->userCan( 'read' );
		}

		if ( $userCan ) {
			try {
				$thumb = $img->transform( array( 'width' => $width ), 0 );
			} catch( Exception $ex ) {
				$thumb = false;
			}
			if ( $thumb && !$thumb->isError() ) {
				/**
				 * Thumbnails for foreign images have mPath == 'bogus'.
				 * So, what hack is better? Redirect to $thumb->getUrl() or
				 * make up the path using document root and stream the file?
				 * Second will work for closed intranet wikis, so I'm using it by now.
				 *
				 * Redirect code:
				 * header( 'HTTP/1.1 301 Moved Permanently' );
				 * header( 'Location: '.$thumb->getUrl() );
				 */
				global $IP;
				require_once "$IP/includes/StreamFile.php";
				StreamFile::stream( $_SERVER['DOCUMENT_ROOT'].$thumb->getUrl() );
				exit;
			}
		}
	}
	return 'Error generating thumbnail';
}

// Adds javascript files and stylesheets.
function efSBTAddScripts( $out ) {
	global $wgServer, $wgScriptPath, $wgArticlePath;

	$out->addModules( "ext.slimboxthumbs" );

	$re = str_replace( '\\$1', '[^:]+:(.*)', preg_quote( $wgArticlePath ) );
	$out->addInlineScript( "$( window ).on( 'load', function() {".
		"makeSlimboxThumbs( jQuery, \"".addslashes( $re ).
		"\", \"".addslashes( $wgServer.$wgScriptPath )."\" ); } );" );

	return true;
}