Linker.php
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Linker.php
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	<?php
	/**
	* Methods to make links and related items.
	*
	* 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
	*/

	namespace MediaWiki\Linker;

	use File;
	use HtmlArmor;
	use MediaTransformError;
	use MediaTransformOutput;
	use MediaWiki\Context\ContextSource;
	use MediaWiki\Context\DerivativeContext;
	use MediaWiki\Context\IContextSource;
	use MediaWiki\Context\RequestContext;
	use MediaWiki\HookContainer\HookRunner;
	use MediaWiki\Html\Html;
	use MediaWiki\Html\HtmlHelper;
	use MediaWiki\MainConfigNames;
	use MediaWiki\MediaWikiServices;
	use MediaWiki\Message\Message;
	use MediaWiki\Parser\Parser;
	use MediaWiki\Permissions\Authority;
	use MediaWiki\Revision\RevisionRecord;
	use MediaWiki\SpecialPage\SpecialPage;
	use MediaWiki\Title\Title;
	use MediaWiki\Title\TitleValue;
	use MediaWiki\User\ExternalUserNames;
	use MediaWiki\User\UserIdentityValue;
	use MediaWiki\Xml\Xml;
	use MessageLocalizer;
	use Wikimedia\Assert\Assert;
	use Wikimedia\IPUtils;
	use Wikimedia\Rdbms\SelectQueryBuilder;
	use Wikimedia\RemexHtml\Serializer\SerializerNode;

	/**
	* Some internal bits split of from Skin.php. These functions are used
	* for primarily page content: links, embedded images, table of contents. Links
	* are also used in the skin.
	*
	* @todo turn this into a legacy interface for HtmlPageLinkRenderer and similar services.
	*
	* @ingroup Skins
	*/
	class Linker {
	/**
	* Flags for userToolLinks()
	*/
	public const TOOL_LINKS_NOBLOCK = 1;
	public const TOOL_LINKS_EMAIL = 2;

	/**
	* This function returns an HTML link to the given target. It serves a few
	* purposes:
	* 1) If $target is a LinkTarget, the correct URL to link to will be figured
	* out automatically.
	* 2) It automatically adds the usual classes for various types of link
	* targets: "new" for red links, "stub" for short articles, etc.
	* 3) It escapes all attribute values safely so there's no risk of XSS.
	* 4) It provides a default tooltip if the target is a LinkTarget (the page
	* name of the target).
	* link() replaces the old functions in the makeLink() family.
	*
	* @since 1.18 Method exists since 1.16 as non-static, made static in 1.18.
	* @deprecated since 1.28, use MediaWiki\Linker\LinkRenderer instead
	*
	* @param LinkTarget $target Can currently only be a LinkTarget, but this may
	* change to support Images, literal URLs, etc.
	* @param string\|null $html The HTML contents of the <a> element, i.e.,
	* the link text. This is raw HTML and will not be escaped. If null,
	* defaults to the prefixed text of the LinkTarget; or if the LinkTarget is just a
	* fragment, the contents of the fragment.
	* @param array $customAttribs A key => value array of extra HTML attributes,
	* such as title and class. (href is ignored.) Classes will be
	* merged with the default classes, while other attributes will replace
	* default attributes. All passed attribute values will be HTML-escaped.
	* A false attribute value means to suppress that attribute.
	* @param array $query The query string to append to the URL
	* you're linking to, in key => value array form. Query keys and values
	* will be URL-encoded.
	* @param string\|array $options String or array of strings:
	* 'known': Page is known to exist, so don't check if it does.
	* 'broken': Page is known not to exist, so don't check if it does.
	* 'noclasses': Don't add any classes automatically (includes "new",
	* "stub", "mw-redirect", "extiw"). Only use the class attribute
	* provided, if any, so you get a simple blue link with no icons.
	* 'forcearticlepath': Use the article path always, even with a querystring.
	* Has compatibility issues on some setups, so avoid wherever possible.
	* 'http': Force a full URL with http:// as the scheme.
	* 'https': Force a full URL with https:// as the scheme.
	* @return string HTML <a> attribute
	*/
	public static function link(
	$target, $html = null, $customAttribs = [], $query = [], $options = []
	) {
	if ( !$target instanceof LinkTarget ) {
	wfWarn( __METHOD__ . ': Requires $target to be a LinkTarget object.', 2 );
	return "<!-- ERROR -->$html";
	}

	$services = MediaWikiServices::getInstance();
	$options = (array)$options;
	if ( $options ) {
	// Custom options, create new LinkRenderer
	$linkRenderer = $services->getLinkRendererFactory()
	->createFromLegacyOptions( $options );
	} else {
	$linkRenderer = $services->getLinkRenderer();
	}

	if ( $html !== null ) {
	$text = new HtmlArmor( $html );
	} else {
	$text = null;
	}

	if ( in_array( 'known', $options, true ) ) {
	return $linkRenderer->makeKnownLink( $target, $text, $customAttribs, $query );
	}

	if ( in_array( 'broken', $options, true ) ) {
	return $linkRenderer->makeBrokenLink( $target, $text, $customAttribs, $query );
	}

	if ( in_array( 'noclasses', $options, true ) ) {
	return $linkRenderer->makePreloadedLink( $target, $text, '', $customAttribs, $query );
	}

	return $linkRenderer->makeLink( $target, $text, $customAttribs, $query );
	}

	/**
	* Identical to link(), except $options defaults to 'known'.
	*
	* @since 1.16.3
	* @deprecated since 1.28, use MediaWiki\Linker\LinkRenderer instead
	* @see Linker::link
	* @param LinkTarget $target
	* @param-taint $target none
	* @param string\|null $html
	* @param-taint $html exec_html
	* @param array $customAttribs
	* @param-taint $customAttribs none
	* @param array $query
	* @param-taint $query none
	* @param string\|array $options
	* @param-taint $options none
	* @return string
	* @return-taint escaped
	*/
	public static function linkKnown(
	$target, $html = null, $customAttribs = [],
	$query = [], $options = [ 'known' ]
	) {
	return self::link( $target, $html, $customAttribs, $query, $options );
	}

	/**
	* Make appropriate markup for a link to the current article. This is since
	* MediaWiki 1.29.0 rendered as an <a> tag without an href and with a class
	* showing the link text. The calling sequence is the same as for the other
	* make*LinkObj static functions, but $query is not used.
	*
	* @since 1.16.3
	* @param LinkTarget $nt
	* @param string $html
	* @param string $query
	* @param string $trail
	* @param string $prefix
	* @param string $hash hash fragment since 1.40. Should be properly escaped using
	* Sanitizer::escapeIdForLink before being passed to this function.
	*
	* @return string
	*/
	public static function makeSelfLinkObj( $nt, $html = '', $query = '', $trail = '', $prefix = '', $hash = '' ) {
	$nt = Title::newFromLinkTarget( $nt );
	$attrs = [];
	if ( $hash ) {
	$attrs['class'] = 'mw-selflink-fragment';
	$attrs['href'] = '#' . $hash;
	} else {
	// For backwards compatibility with gadgets we add selflink as well.
	$attrs['class'] = 'mw-selflink selflink';
	}
	$ret = Html::rawElement( 'a', $attrs, $prefix . $html ) . $trail;
	$hookRunner = new HookRunner( MediaWikiServices::getInstance()->getHookContainer() );
	if ( !$hookRunner->onSelfLinkBegin( $nt, $html, $trail, $prefix, $ret ) ) {
	return $ret;
	}

	if ( $html == '' ) {
	$html = htmlspecialchars( $nt->getPrefixedText() );
	}
	[ $inside, $trail ] = self::splitTrail( $trail );
	return Html::rawElement( 'a', $attrs, $prefix . $html . $inside ) . $trail;
	}

	/**
	* Get a message saying that an invalid title was encountered.
	* This should be called after a method like Title::makeTitleSafe() returned
	* a value indicating that the title object is invalid.
	*
	* @param IContextSource $context Context to use to get the messages
	* @param int $namespace Namespace number
	* @param string $title Text of the title, without the namespace part
	* @return string
	*/
	public static function getInvalidTitleDescription( IContextSource $context, $namespace, $title ) {
	// First we check whether the namespace exists or not.
	if ( MediaWikiServices::getInstance()->getNamespaceInfo()->exists( $namespace ) ) {
	if ( $namespace == NS_MAIN ) {
	$name = $context->msg( 'blanknamespace' )->text();
	} else {
	$name = MediaWikiServices::getInstance()->getContentLanguage()->
	getFormattedNsText( $namespace );
	}
	return $context->msg( 'invalidtitle-knownnamespace', $namespace, $name, $title )->text();
	}

	return $context->msg( 'invalidtitle-unknownnamespace', $namespace, $title )->text();
	}

	/**
	* Returns the filename part of an url.
	* Used as alternative text for external images.
	*
	* @param string $url
	*
	* @return string
	*/
	private static function fnamePart( $url ) {
	$basename = strrchr( $url, '/' );
	if ( $basename === false ) {
	$basename = $url;
	} else {
	$basename = substr( $basename, 1 );
	}
	return $basename;
	}

	/**
	* Return the code for images which were added via external links,
	* via Parser::maybeMakeExternalImage().
	*
	* @since 1.16.3
	* @param string $url
	* @param string $alt
	*
	* @return string
	*/
	public static function makeExternalImage( $url, $alt = '' ) {
	if ( $alt == '' ) {
	$alt = self::fnamePart( $url );
	}
	$img = '';
	$success = ( new HookRunner( MediaWikiServices::getInstance()->getHookContainer() ) )
	->onLinkerMakeExternalImage( $url, $alt, $img );
	if ( !$success ) {
	wfDebug( "Hook LinkerMakeExternalImage changed the output of external image "
	. "with url {$url} and alt text {$alt} to {$img}" );
	return $img;
	}
	return Html::element( 'img',
	[
	'src' => $url,
	'alt' => $alt
	]
	);
	}

	/**
	* Given parameters derived from [[Image:Foo\|options...]], generate the
	* HTML that that syntax inserts in the page.
	*
	* @param Parser $parser
	* @param LinkTarget $title LinkTarget object of the file (not the currently viewed page)
	* @param File\|false $file File object, or false if it doesn't exist
	* @param array $frameParams Associative array of parameters external to the media handler.
	* Boolean parameters are indicated by presence or absence, the value is arbitrary and
	* will often be false.
	* thumbnail If present, downscale and frame
	* manualthumb Image name to use as a thumbnail, instead of automatic scaling
	* framed Shows image in original size in a frame
	* frameless Downscale but don't frame
	* upright If present, tweak default sizes for portrait orientation
	* upright_factor Fudge factor for "upright" tweak (default 0.75)
	* border If present, show a border around the image
	* align Horizontal alignment (left, right, center, none)
	* valign Vertical alignment (baseline, sub, super, top, text-top, middle,
	* bottom, text-bottom)
	* alt Alternate text for image (i.e. alt attribute). Plain text.
	* title Used for tooltips if caption isn't visible.
	* class HTML for image classes. Plain text.
	* caption HTML for image caption.
	* link-url URL to link to
	* link-title LinkTarget object to link to
	* link-target Value for the target attribute, only with link-url
	* no-link Boolean, suppress description link
	*
	* @param array $handlerParams Associative array of media handler parameters, to be passed
	* to transform(). Typical keys are "width" and "page".
	* targetlang (optional) Target language code, see Parser::getTargetLanguage()
	* @param string\|false $time Timestamp of the file, set as false for current
	* @param string $query Query params for desc url
	* @param int\|null $widthOption Used by the parser to remember the user preference thumbnailsize
	* @since 1.20
	* @return string HTML for an image, with links, wrappers, etc.
	*/
	public static function makeImageLink( Parser $parser, LinkTarget $title,
	$file, $frameParams = [], $handlerParams = [], $time = false,
	$query = '', $widthOption = null
	) {
	$title = Title::newFromLinkTarget( $title );
	$res = null;
	$hookRunner = new HookRunner( MediaWikiServices::getInstance()->getHookContainer() );
	if ( !$hookRunner->onImageBeforeProduceHTML( null, $title,
	// @phan-suppress-next-line PhanTypeMismatchArgument Type mismatch on pass-by-ref args
	$file, $frameParams, $handlerParams, $time, $res,
	// @phan-suppress-next-line PhanTypeMismatchArgument Type mismatch on pass-by-ref args
	$parser, $query, $widthOption )
	) {
	return $res;
	}

	if ( $file && !$file->allowInlineDisplay() ) {
	wfDebug( __METHOD__ . ': ' . $title->getPrefixedDBkey() . ' does not allow inline display' );
	return self::link( $title );
	}

	// Clean up parameters
	$page = $handlerParams['page'] ?? false;
	if ( !isset( $frameParams['align'] ) ) {
	$frameParams['align'] = '';
	}
	if ( !isset( $frameParams['title'] ) ) {
	$frameParams['title'] = '';
	}
	if ( !isset( $frameParams['class'] ) ) {
	$frameParams['class'] = '';
	}

	$services = MediaWikiServices::getInstance();
	$config = $services->getMainConfig();
	$enableLegacyMediaDOM = $config->get( MainConfigNames::ParserEnableLegacyMediaDOM );

	$classes = [];
	if (
	!isset( $handlerParams['width'] ) &&
	!isset( $frameParams['manualthumb'] ) &&
	!isset( $frameParams['framed'] )
	) {
	$classes[] = 'mw-default-size';
	}

	$prefix = $postfix = '';

	if ( $enableLegacyMediaDOM ) {
	if ( $frameParams['align'] == 'center' ) {
	$prefix = '<div class="center">';
	$postfix = '</div>';
	$frameParams['align'] = 'none';
	}
	}

	if ( $file && !isset( $handlerParams['width'] ) ) {
	if ( isset( $handlerParams['height'] ) && $file->isVectorized() ) {
	// If its a vector image, and user only specifies height
	// we don't want it to be limited by its "normal" width.
	$svgMaxSize = $config->get( MainConfigNames::SVGMaxSize );
	$handlerParams['width'] = $svgMaxSize;
	} else {
	$handlerParams['width'] = $file->getWidth( $page );
	}

	if ( isset( $frameParams['thumbnail'] )
	\|\| isset( $frameParams['manualthumb'] )
	\|\| isset( $frameParams['framed'] )
	\|\| isset( $frameParams['frameless'] )
	\|\| !$handlerParams['width']
	) {
	$thumbLimits = $config->get( MainConfigNames::ThumbLimits );
	$thumbUpright = $config->get( MainConfigNames::ThumbUpright );
	if ( $widthOption === null \|\| !isset( $thumbLimits[$widthOption] ) ) {
	$userOptionsLookup = $services->getUserOptionsLookup();
	$widthOption = $userOptionsLookup->getDefaultOption( 'thumbsize' );
	}

	// Reduce width for upright images when parameter 'upright' is used
	if ( isset( $frameParams['upright'] ) && $frameParams['upright'] == 0 ) {
	$frameParams['upright'] = $thumbUpright;
	}

	// For caching health: If width scaled down due to upright
	// parameter, round to full __0 pixel to avoid the creation of a
	// lot of odd thumbs.
	$prefWidth = isset( $frameParams['upright'] ) ?
	round( $thumbLimits[$widthOption] * $frameParams['upright'], -1 ) :
	$thumbLimits[$widthOption];

	// Use width which is smaller: real image width or user preference width
	// Unless image is scalable vector.
	if ( !isset( $handlerParams['height'] ) && ( $handlerParams['width'] <= 0 \|\|
	$prefWidth < $handlerParams['width'] \|\| $file->isVectorized() ) ) {
	$handlerParams['width'] = $prefWidth;
	}
	}
	}

	// Parser::makeImage has a similarly named variable
	$hasVisibleCaption = isset( $frameParams['thumbnail'] ) \|\|
	isset( $frameParams['manualthumb'] ) \|\|
	isset( $frameParams['framed'] );

	if ( $hasVisibleCaption ) {
	if ( $enableLegacyMediaDOM ) {
	// This is no longer needed in our new media output, since the
	// default styling in content.media-common.less takes care of it;
	// see T269704.

	# Create a thumbnail. Alignment depends on the writing direction of
	# the page content language (right-aligned for LTR languages,
	# left-aligned for RTL languages)
	# If a thumbnail width has not been provided, it is set
	# to the default user option as specified in Language*.php
	if ( $frameParams['align'] == '' ) {
	$frameParams['align'] = $parser->getTargetLanguage()->alignEnd();
	}
	}
	return $prefix . self::makeThumbLink2(
	$title, $file, $frameParams, $handlerParams, $time, $query,
	$classes, $parser
	) . $postfix;
	}

	$rdfaType = 'mw:File';

	if ( isset( $frameParams['frameless'] ) ) {
	$rdfaType .= '/Frameless';
	if ( $file ) {
	$srcWidth = $file->getWidth( $page );
	# For "frameless" option: do not present an image bigger than the
	# source (for bitmap-style images). This is the same behavior as the
	# "thumb" option does it already.
	if ( $srcWidth && !$file->mustRender() && $handlerParams['width'] > $srcWidth ) {
	$handlerParams['width'] = $srcWidth;
	}
	}
	}

	if ( $file && isset( $handlerParams['width'] ) ) {
	# Create a resized image, without the additional thumbnail features
	$thumb = $file->transform( $handlerParams );
	} else {
	$thumb = false;
	}

	$isBadFile = $file && $thumb &&
	$parser->getBadFileLookup()->isBadFile( $title->getDBkey(), $parser->getTitle() );

	if ( !$thumb \|\| ( !$enableLegacyMediaDOM && $thumb->isError() ) \|\| $isBadFile ) {
	$rdfaType = 'mw:Error ' . $rdfaType;
	$currentExists = $file && $file->exists();
	if ( $enableLegacyMediaDOM ) {
	$label = $frameParams['title'];
	} else {
	if ( $currentExists && !$thumb ) {
	$label = wfMessage( 'thumbnail_error', '' )->text();
	} elseif ( $thumb && $thumb->isError() ) {
	Assert::invariant(
	$thumb instanceof MediaTransformError,
	'Unknown MediaTransformOutput: ' . get_class( $thumb )
	);
	$label = $thumb->toText();
	} else {
	$label = $frameParams['alt'] ?? '';
	}
	}
	$s = self::makeBrokenImageLinkObj(
	$title, $label, '', '', '', (bool)$time, $handlerParams, $currentExists
	);
	} else {
	self::processResponsiveImages( $file, $thumb, $handlerParams );
	$params = [];
	// 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( $frameParams['alt'] ) ) {
	$params['alt'] = $frameParams['alt'];
	}
	$params['title'] = $frameParams['title'];
	if ( $enableLegacyMediaDOM ) {
	$params += [
	'valign' => $frameParams['valign'] ?? false,
	'img-class' => $frameParams['class'],
	];
	if ( isset( $frameParams['border'] ) ) {
	$params['img-class'] .= ( $params['img-class'] !== '' ? ' ' : '' ) . 'thumbborder';
	}
	} else {
	$params += [
	'img-class' => 'mw-file-element',
	];
	}
	$params = self::getImageLinkMTOParams( $frameParams, $query, $parser ) + $params;
	$s = $thumb->toHtml( $params );
	}

	if ( $enableLegacyMediaDOM ) {
	if ( $frameParams['align'] != '' ) {
	$s = Html::rawElement(
	'div',
	[ 'class' => 'float' . $frameParams['align'] ],
	$s
	);
	}
	return str_replace( "\n", ' ', $prefix . $s . $postfix );
	}

	$wrapper = 'span';
	$caption = '';

	if ( $frameParams['align'] != '' ) {
	$wrapper = 'figure';
	// Possible values: mw-halign-left mw-halign-center mw-halign-right mw-halign-none
	$classes[] = "mw-halign-{$frameParams['align']}";
	$caption = Html::rawElement(
	'figcaption', [], $frameParams['caption'] ?? ''
	);
	} elseif ( isset( $frameParams['valign'] ) ) {
	// Possible values: mw-valign-middle mw-valign-baseline mw-valign-sub
	// mw-valign-super mw-valign-top mw-valign-text-top mw-valign-bottom
	// mw-valign-text-bottom
	$classes[] = "mw-valign-{$frameParams['valign']}";
	}

	if ( isset( $frameParams['border'] ) ) {
	$classes[] = 'mw-image-border';
	}

	if ( isset( $frameParams['class'] ) ) {
	$classes[] = $frameParams['class'];
	}

	$attribs = [
	'class' => $classes,
	'typeof' => $rdfaType,
	];

	$s = Html::rawElement( $wrapper, $attribs, $s . $caption );

	return str_replace( "\n", ' ', $s );
	}

	/**
	* Get the link parameters for MediaTransformOutput::toHtml() from given
	* frame parameters supplied by the Parser.
	* @param array $frameParams The frame parameters
	* @param string $query An optional query string to add to description page links
	* @param Parser\|null $parser
	* @return array
	*/
	public static function getImageLinkMTOParams( $frameParams, $query = '', $parser = null ) {
	$mtoParams = [];
	if ( isset( $frameParams['link-url'] ) && $frameParams['link-url'] !== '' ) {
	$mtoParams['custom-url-link'] = $frameParams['link-url'];
	if ( isset( $frameParams['link-target'] ) ) {
	$mtoParams['custom-target-link'] = $frameParams['link-target'];
	}
	if ( $parser ) {
	$extLinkAttrs = $parser->getExternalLinkAttribs( $frameParams['link-url'] );
	foreach ( $extLinkAttrs as $name => $val ) {
	// Currently could include 'rel' and 'target'
	$mtoParams['parser-extlink-' . $name] = $val;
	}
	}
	} elseif ( isset( $frameParams['link-title'] ) && $frameParams['link-title'] !== '' ) {
	$linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
	$mtoParams['custom-title-link'] = Title::newFromLinkTarget(
	$linkRenderer->normalizeTarget( $frameParams['link-title'] )
	);
	if ( isset( $frameParams['link-title-query'] ) ) {
	$mtoParams['custom-title-link-query'] = $frameParams['link-title-query'];
	}
	} elseif ( !empty( $frameParams['no-link'] ) ) {
	// No link
	} else {
	$mtoParams['desc-link'] = true;
	$mtoParams['desc-query'] = $query;
	}
	return $mtoParams;
	}

	/**
	* Make HTML for a thumbnail including image, border and caption
	* @param LinkTarget $title
	* @param File\|false $file File object or false if it doesn't exist
	* @param string $label
	* @param string $alt
	* @param string\|null $align
	* @param array $params
	* @param bool $framed
	* @param string $manualthumb
	* @return string
	*/
	public static function makeThumbLinkObj(
	LinkTarget $title, $file, $label = '', $alt = '', $align = null,
	$params = [], $framed = false, $manualthumb = ''
	) {
	$frameParams = [
	'alt' => $alt,
	'caption' => $label,
	'align' => $align
	];
	$classes = [];
	if ( $manualthumb ) {
	$frameParams['manualthumb'] = $manualthumb;
	} elseif ( $framed ) {
	$frameParams['framed'] = true;
	} elseif ( !isset( $params['width'] ) ) {
	$classes[] = 'mw-default-size';
	}
	return self::makeThumbLink2(
	$title, $file, $frameParams, $params, false, '', $classes
	);
	}

	/**
	* @param LinkTarget $title
	* @param File\|false $file
	* @param array $frameParams
	* @param array $handlerParams
	* @param bool $time If a file of a certain timestamp was requested
	* @param string $query
	* @param string[] $classes @since 1.36
	* @param Parser\|null $parser @since 1.38
	* @return string
	*/
	public static function makeThumbLink2(
	LinkTarget $title, $file, $frameParams = [], $handlerParams = [],
	$time = false, $query = '', array $classes = [], ?Parser $parser = null
	) {
	$exists = $file && $file->exists();

	$services = MediaWikiServices::getInstance();
	$enableLegacyMediaDOM = $services->getMainConfig()->get( MainConfigNames::ParserEnableLegacyMediaDOM );

	$page = $handlerParams['page'] ?? false;
	$lang = $handlerParams['lang'] ?? false;

	if ( !isset( $frameParams['align'] ) ) {
	$frameParams['align'] = '';
	if ( $enableLegacyMediaDOM ) {
	$frameParams['align'] = 'right';
	}
	}
	if ( !isset( $frameParams['caption'] ) ) {
	$frameParams['caption'] = '';
	}

	if ( empty( $handlerParams['width'] ) ) {
	// Reduce width for upright images when parameter 'upright' is used
	$handlerParams['width'] = isset( $frameParams['upright'] ) ? 130 : 180;
	}

	$thumb = false;
	$noscale = false;
	$manualthumb = false;
	$manual_title = '';
	$rdfaType = 'mw:File/Thumb';

	if ( !$exists ) {
	// Same precedence as the $exists case
	if ( !isset( $frameParams['manualthumb'] ) && isset( $frameParams['framed'] ) ) {
	$rdfaType = 'mw:File/Frame';
	}
	$outerWidth = $handlerParams['width'] + 2;
	} else {
	if ( isset( $frameParams['manualthumb'] ) ) {
	# Use manually specified thumbnail
	$manual_title = Title::makeTitleSafe( NS_FILE, $frameParams['manualthumb'] );
	if ( $manual_title ) {
	$manual_img = $services->getRepoGroup()
	->findFile( $manual_title );
	if ( $manual_img ) {
	$thumb = $manual_img->getUnscaledThumb( $handlerParams );
	$manualthumb = true;
	}
	}
	} else {
	$srcWidth = $file->getWidth( $page );
	if ( isset( $frameParams['framed'] ) ) {
	$rdfaType = 'mw:File/Frame';
	if ( !$file->isVectorized() ) {
	// Use image dimensions, don't scale
	$noscale = true;
	} else {
	// framed is unscaled, but for vectorized images
	// we need to a width for scaling up for the high density variants
	$handlerParams['width'] = $srcWidth;
	}
	}

	// Do not present an image bigger than the source, for bitmap-style images
	// This is a hack to maintain compatibility with arbitrary pre-1.10 behavior
	if ( $srcWidth && !$file->mustRender() && $handlerParams['width'] > $srcWidth ) {
	$handlerParams['width'] = $srcWidth;
	}

	$thumb = $noscale
	? $file->getUnscaledThumb( $handlerParams )
	: $file->transform( $handlerParams );
	}

	if ( $thumb ) {
	$outerWidth = $thumb->getWidth() + 2;
	} else {
	$outerWidth = $handlerParams['width'] + 2;
	}
	}

	if ( !$enableLegacyMediaDOM && $parser && $rdfaType === 'mw:File/Thumb' ) {
	$parser->getOutput()->addModules( [ 'mediawiki.page.media' ] );
	}

	$url = Title::newFromLinkTarget( $title )->getLocalURL( $query );
	$linkTitleQuery = [];
	if ( $page \|\| $lang ) {
	if ( $page ) {
	$linkTitleQuery['page'] = $page;
	}
	if ( $lang ) {
	$linkTitleQuery['lang'] = $lang;
	}
	# ThumbnailImage::toHtml() already adds page= onto the end of DjVu URLs
	# So we don't need to pass it here in $query. However, the URL for the
	# zoom icon still needs it, so we make a unique query for it. See T16771
	$url = wfAppendQuery( $url, $linkTitleQuery );
	}

	if ( $manualthumb
	&& !isset( $frameParams['link-title'] )
	&& !isset( $frameParams['link-url'] )
	&& !isset( $frameParams['no-link'] ) ) {
	$frameParams['link-title'] = $title;
	$frameParams['link-title-query'] = $linkTitleQuery;
	}

	if ( $frameParams['align'] != '' ) {
	// Possible values: mw-halign-left mw-halign-center mw-halign-right mw-halign-none
	$classes[] = "mw-halign-{$frameParams['align']}";
	}

	if ( isset( $frameParams['class'] ) ) {
	$classes[] = $frameParams['class'];
	}

	$s = '';

	if ( $enableLegacyMediaDOM ) {
	$s .= "<div class=\"thumb t{$frameParams['align']}\">"
	. "<div class=\"thumbinner\" style=\"width:{$outerWidth}px;\">";
	}

	$isBadFile = $exists && $thumb && $parser &&
	$parser->getBadFileLookup()->isBadFile(
	$manualthumb ? $manual_title : $title->getDBkey(),
	$parser->getTitle()
	);

	if ( !$exists ) {
	$rdfaType = 'mw:Error ' . $rdfaType;
	$label = '';
	if ( !$enableLegacyMediaDOM ) {
	$label = $frameParams['alt'] ?? '';
	}
	$s .= self::makeBrokenImageLinkObj(
	$title, $label, '', '', '', (bool)$time, $handlerParams, false
	);
	$zoomIcon = '';
	} elseif ( !$thumb \|\| ( !$enableLegacyMediaDOM && $thumb->isError() ) \|\| $isBadFile ) {
	$rdfaType = 'mw:Error ' . $rdfaType;
	if ( $enableLegacyMediaDOM ) {
	if ( !$thumb ) {
	$s .= wfMessage( 'thumbnail_error', '' )->escaped();
	} else {
	$s .= self::makeBrokenImageLinkObj(
	$title, '', '', '', '', (bool)$time, $handlerParams, true
	);
	}
	} else {
	if ( $thumb && $thumb->isError() ) {
	Assert::invariant(
	$thumb instanceof MediaTransformError,
	'Unknown MediaTransformOutput: ' . get_class( $thumb )
	);
	$label = $thumb->toText();
	} elseif ( !$thumb ) {
	$label = wfMessage( 'thumbnail_error', '' )->text();
	} else {
	$label = '';
	}
	$s .= self::makeBrokenImageLinkObj(
	$title, $label, '', '', '', (bool)$time, $handlerParams, true
	);
	}
	$zoomIcon = '';
	} else {
	if ( !$noscale && !$manualthumb ) {
	self::processResponsiveImages( $file, $thumb, $handlerParams );
	}
	$params = [];
	// 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( $frameParams['alt'] ) ) {
	$params['alt'] = $frameParams['alt'];
	}
	if ( $enableLegacyMediaDOM ) {
	$params += [
	'img-class' => ( isset( $frameParams['class'] ) && $frameParams['class'] !== ''
	? $frameParams['class'] . ' '
	: '' ) . 'thumbimage'
	];
	} else {
	$params += [
	'img-class' => 'mw-file-element',
	];
	// Only thumbs gets the magnify link
	if ( $rdfaType === 'mw:File/Thumb' ) {
	$params['magnify-resource'] = $url;
	}
	}
	$params = self::getImageLinkMTOParams( $frameParams, $query, $parser ) + $params;
	$s .= $thumb->toHtml( $params );
	if ( isset( $frameParams['framed'] ) ) {
	$zoomIcon = '';
	} else {
	$zoomIcon = Html::rawElement( 'div', [ 'class' => 'magnify' ],
	Html::rawElement( 'a', [
	'href' => $url,
	'class' => 'internal',
	'title' => wfMessage( 'thumbnail-more' )->text(),
	] )
	);
	}
	}

	if ( $enableLegacyMediaDOM ) {
	$s .= ' <div class="thumbcaption">' . $zoomIcon . $frameParams['caption'] . '</div></div></div>';
	return str_replace( "\n", ' ', $s );
	}

	$s .= Html::rawElement(
	'figcaption', [], $frameParams['caption'] ?? ''
	);

	$attribs = [
	'class' => $classes,
	'typeof' => $rdfaType,
	];

	$s = Html::rawElement( 'figure', $attribs, $s );

	return str_replace( "\n", ' ', $s );
	}

	/**
	* Process responsive images: add 1.5x and 2x subimages to the thumbnail, where
	* applicable.
	*
	* @param File $file
	* @param MediaTransformOutput\|null $thumb
	* @param array $hp Image parameters
	*/
	public static function processResponsiveImages( $file, $thumb, $hp ) {
	$responsiveImages = MediaWikiServices::getInstance()->getMainConfig()->get( MainConfigNames::ResponsiveImages );
	if ( $responsiveImages && $thumb && !$thumb->isError() ) {
	$hp15 = $hp;
	$hp15['width'] = round( $hp['width'] * 1.5 );
	$hp20 = $hp;
	$hp20['width'] = $hp['width'] * 2;
	if ( isset( $hp['height'] ) ) {
	$hp15['height'] = round( $hp['height'] * 1.5 );
	$hp20['height'] = $hp['height'] * 2;
	}

	$thumb15 = $file->transform( $hp15 );
	$thumb20 = $file->transform( $hp20 );
	if ( $thumb15 && !$thumb15->isError() && $thumb15->getUrl() !== $thumb->getUrl() ) {
	$thumb->responsiveUrls['1.5'] = $thumb15->getUrl();
	}
	if ( $thumb20 && !$thumb20->isError() && $thumb20->getUrl() !== $thumb->getUrl() ) {
	$thumb->responsiveUrls['2'] = $thumb20->getUrl();
	}
	}
	}

	/**
	* Make a "broken" link to an image
	*
	* @since 1.16.3
	* @param LinkTarget $title
	* @param string $label Link label (plain text)
	* @param string $query Query string
	* @param string $unused1 Unused parameter kept for b/c
	* @param string $unused2 Unused parameter kept for b/c
	* @param bool $time A file of a certain timestamp was requested
	* @param array $handlerParams @since 1.36
	* @param bool $currentExists @since 1.41
	* @return string
	*/
	public static function makeBrokenImageLinkObj(
	$title, $label = '', $query = '', $unused1 = '', $unused2 = '',
	$time = false, array $handlerParams = [], bool $currentExists = false
	) {
	if ( !$title instanceof LinkTarget ) {
	wfWarn( __METHOD__ . ': Requires $title to be a LinkTarget object.' );
	return "<!-- ERROR -->" . htmlspecialchars( $label );
	}

	$title = Title::newFromLinkTarget( $title );
	$services = MediaWikiServices::getInstance();
	$mainConfig = $services->getMainConfig();
	$enableUploads = $mainConfig->get( MainConfigNames::EnableUploads );
	$uploadMissingFileUrl = $mainConfig->get( MainConfigNames::UploadMissingFileUrl );
	$uploadNavigationUrl = $mainConfig->get( MainConfigNames::UploadNavigationUrl );
	if ( $label == '' ) {
	$label = $title->getPrefixedText();
	}

	$html = Html::element( 'span', [
	'class' => 'mw-file-element mw-broken-media',
	// These data attributes are used to dynamically size the span, see T273013
	'data-width' => $handlerParams['width'] ?? null,
	'data-height' => $handlerParams['height'] ?? null,
	], $label );

	if ( $mainConfig->get( MainConfigNames::ParserEnableLegacyMediaDOM ) ) {
	$html = htmlspecialchars( $label, ENT_COMPAT );
	}

	$repoGroup = $services->getRepoGroup();
	$currentExists = $currentExists \|\|
	( $time && $repoGroup->findFile( $title ) !== false );

	if ( ( $uploadMissingFileUrl \|\| $uploadNavigationUrl \|\| $enableUploads )
	&& !$currentExists
	) {
	if (
	$title->inNamespace( NS_FILE ) &&
	$repoGroup->getLocalRepo()->checkRedirect( $title )
	) {
	// We already know it's a redirect, so mark it accordingly
	return self::link(
	$title,
	$html,
	[ 'class' => 'mw-redirect' ],
	wfCgiToArray( $query ),
	[ 'known', 'noclasses' ]
	);
	}
	return Html::rawElement( 'a', [
	'href' => self::getUploadUrl( $title, $query ),
	'class' => 'new',
	'title' => $title->getPrefixedText()
	], $html );
	}
	return self::link(
	$title,
	$html,
	[],
	wfCgiToArray( $query ),
	[ 'known', 'noclasses' ]
	);
	}

	/**
	* Get the URL to upload a certain file
	*
	* @since 1.16.3
	* @param LinkTarget $destFile LinkTarget object of the file to upload
	* @param string $query Urlencoded query string to prepend
	* @return string Urlencoded URL
	*/
	public static function getUploadUrl( $destFile, $query = '' ) {
	$mainConfig = MediaWikiServices::getInstance()->getMainConfig();
	$uploadMissingFileUrl = $mainConfig->get( MainConfigNames::UploadMissingFileUrl );
	$uploadNavigationUrl = $mainConfig->get( MainConfigNames::UploadNavigationUrl );
	$q = 'wpDestFile=' . Title::newFromLinkTarget( $destFile )->getPartialURL();
	if ( $query != '' ) {
	$q .= '&' . $query;
	}

	if ( $uploadMissingFileUrl ) {
	return wfAppendQuery( $uploadMissingFileUrl, $q );
	}

	if ( $uploadNavigationUrl ) {
	return wfAppendQuery( $uploadNavigationUrl, $q );
	}

	$upload = SpecialPage::getTitleFor( 'Upload' );

	return $upload->getLocalURL( $q );
	}

	/**
	* Create a direct link to a given uploaded file.
	*
	* @since 1.16.3
	* @param LinkTarget $title
	* @param string $html Pre-sanitized HTML
	* @param string\|false $time MW timestamp of file creation time
	* @return string HTML
	*/
	public static function makeMediaLinkObj( $title, $html = '', $time = false ) {
	$img = MediaWikiServices::getInstance()->getRepoGroup()->findFile(
	$title, [ 'time' => $time ]
	);
	return self::makeMediaLinkFile( $title, $img, $html );
	}

	/**
	* Create a direct link to a given uploaded file.
	* This will make a broken link if $file is false.
	*
	* @since 1.16.3
	* @param LinkTarget $title
	* @param File\|false $file File object or false
	* @param string $html Pre-sanitized HTML
	* @return string HTML
	*
	* @todo Handle invalid or missing images better.
	*/
	public static function makeMediaLinkFile( LinkTarget $title, $file, $html = '' ) {
	if ( $file && $file->exists() ) {
	$url = $file->getUrl();
	$class = 'internal';
	} else {
	$url = self::getUploadUrl( $title );
	$class = 'new';
	}

	$alt = $title->getText();
	if ( $html == '' ) {
	$html = $alt;
	}

	$ret = '';
	$attribs = [
	'href' => $url,
	'class' => $class,
	'title' => $alt
	];

	if ( !( new HookRunner( MediaWikiServices::getInstance()->getHookContainer() ) )->onLinkerMakeMediaLinkFile(
	Title::newFromLinkTarget( $title ), $file, $html, $attribs, $ret )
	) {
	wfDebug( "Hook LinkerMakeMediaLinkFile changed the output of link "
	. "with url {$url} and text {$html} to {$ret}" );
	return $ret;
	}

	return Html::rawElement( 'a', $attribs, $html );
	}

	/**
	* Make a link to a special page given its name and, optionally,
	* a message key from the link text.
	* Usage example: Linker::specialLink( 'Recentchanges' )
	*
	* @since 1.16.3
	* @param string $name Special page name, can optionally include …/subpages and …?parameters
	* @param string $key Optional message key if different from $name
	* @return string
	*/
	public static function specialLink( $name, $key = '' ) {
	$queryPos = strpos( $name, '?' );
	if ( $queryPos !== false ) {
	$getParams = wfCgiToArray( substr( $name, $queryPos + 1 ) );
	$name = substr( $name, 0, $queryPos );
	} else {
	$getParams = [];
	}

	$slashPos = strpos( $name, '/' );
	if ( $slashPos !== false ) {
	$subpage = substr( $name, $slashPos + 1 );
	$name = substr( $name, 0, $slashPos );
	} else {
	$subpage = false;
	}

	if ( $key == '' ) {
	$key = strtolower( $name );
	}

	return self::linkKnown(
	SpecialPage::getTitleFor( $name, $subpage ),
	wfMessage( $key )->escaped(),
	[],
	$getParams
	);
	}

	/**
	* Make an external link
	*
	* @since 1.16.3. $title added in 1.21
	* @param string $url URL to link to
	* @param-taint $url escapes_html
	* @param string $text Text of link
	* @param-taint $text none
	* @param bool $escape Do we escape the link text?
	* @param-taint $escape none
	* @param string $linktype Type of external link. Gets added to the classes
	* @param-taint $linktype escapes_html
	* @param array $attribs Array of extra attributes to <a>
	* @param-taint $attribs escapes_html
	* @param LinkTarget\|null $title LinkTarget object used for title specific link attributes
	* @param-taint $title none
	* @return string
	* @deprecated since 1.43; use LinkRenderer::makeExternalLink(), passing
	* in an HtmlArmor instance if $escape was false.
	*/
	public static function makeExternalLink( $url, $text, $escape = true,
	$linktype = '', $attribs = [], $title = null
	) {
	// phpcs:ignore MediaWiki.Usage.DeprecatedGlobalVariables.Deprecated$wgTitle
	global $wgTitle;
	$linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
	return $linkRenderer->makeExternalLink(
	$url,
	$escape ? $text : new HtmlArmor( $text ),
	$title ?? $wgTitle ?? SpecialPage::getTitleFor( 'Badtitle' ),
	$linktype,
	$attribs
	);
	}

	/**
	* Make user link (or user contributions for unregistered users)
	*
	* This method produces HTML that requires CSS styles in mediawiki.interface.helpers.styles.
	*
	* @param int $userId User id in database.
	* @param string $userName User name in database.
	* @param string\|false $altUserName Text to display instead of the user name (optional)
	* @param string[] $attributes Extra HTML attributes. See Linker::link.
	* @return string HTML fragment
	* @since 1.16.3. $altUserName was added in 1.19. $attributes was added in 1.40.
	*/
	public static function userLink(
	$userId,
	$userName,
	$altUserName = false,
	$attributes = []
	) {
	if ( $userName === '' \|\| $userName === false \|\| $userName === null ) {
	wfDebug( __METHOD__ . ' received an empty username. Are there database errors ' .
	'that need to be fixed?' );
	return wfMessage( 'empty-username' )->parse();
	}

	$classes = 'mw-userlink';
	if ( MediaWikiServices::getInstance()->getTempUserConfig()->isTempName( $userName ) ) {
	$classes .= ' mw-tempuserlink';
	$page = SpecialPage::getTitleValueFor( 'Contributions', $userName );
	} elseif ( $userId == 0 ) {
	$page = ExternalUserNames::getUserLinkTitle( $userName );

	if ( ExternalUserNames::isExternal( $userName ) ) {
	$classes .= ' mw-extuserlink';
	} elseif ( $altUserName === false ) {
	$altUserName = IPUtils::prettifyIP( $userName );
	}
	$classes .= ' mw-anonuserlink'; // Separate link class for anons (T45179)
	} else {
	$page = TitleValue::tryNew( NS_USER, strtr( $userName, ' ', '_' ) );
	}

	// Wrap the output with <bdi> tags for directionality isolation
	$linkText =
	'<bdi>' . htmlspecialchars( $altUserName !== false ? $altUserName : $userName ) . '</bdi>';

	if ( isset( $attributes['class'] ) ) {
	$attributes['class'] .= ' ' . $classes;
	} else {
	$attributes['class'] = $classes;
	}

	return $page
	? self::link( $page, $linkText, $attributes )
	: Html::rawElement( 'span', $attributes, $linkText );
	}

	/**
	* Generate standard user tool links (talk, contributions, block link, etc.)
	*
	* @since 1.42
	* @param int $userId User identifier
	* @param string $userText User name or IP address
	* @param bool $redContribsWhenNoEdits Should the contributions link be
	* red if the user has no edits?
	* @param int $flags Customisation flags (e.g. Linker::TOOL_LINKS_NOBLOCK
	* and Linker::TOOL_LINKS_EMAIL).
	* @param int\|null $edits User edit count. If you enable $redContribsWhenNoEdits,
	* you may pass a pre-computed edit count here, or 0 if the caller knows that
	* the account has 0 edits. Otherwise, the value is unused and null may
	* be passed. If $redContribsWhenNoEdits is enabled and null is passed, the
	* edit count will be lazily fetched from UserEditTracker.
	* @return string[] Array of HTML fragments, each of them a link tag with a distinctive
	* class; or a single string on error.
	*/
	public static function userToolLinkArray(
	$userId, $userText, $redContribsWhenNoEdits = false, $flags = 0, $edits = null
	): array {
	$services = MediaWikiServices::getInstance();
	$disableAnonTalk = $services->getMainConfig()->get( MainConfigNames::DisableAnonTalk );
	$talkable = !( $disableAnonTalk && $userId == 0 );
	$blockable = !( $flags & self::TOOL_LINKS_NOBLOCK );
	$addEmailLink = $flags & self::TOOL_LINKS_EMAIL && $userId;

	if ( $userId == 0 && ExternalUserNames::isExternal( $userText ) ) {
	// No tools for an external user
	return [];
	}

	$items = [];
	if ( $talkable ) {
	$items[] = self::userTalkLink( $userId, $userText );
	}
	if ( $userId ) {
	// check if the user has an edit
	$attribs = [];
	$attribs['class'] = 'mw-usertoollinks-contribs';
	if ( $redContribsWhenNoEdits ) {
	if ( $edits === null ) {
	$user = UserIdentityValue::newRegistered( $userId, $userText );
	$edits = $services->getUserEditTracker()->getUserEditCount( $user );
	}
	if ( $edits === 0 ) {
	// Note: "new" class is inappropriate here, as "new" class
	// should only be used for pages that do not exist.
	$attribs['class'] .= ' mw-usertoollinks-contribs-no-edits';
	}
	}
	$contribsPage = SpecialPage::getTitleFor( 'Contributions', $userText );

	$items[] = self::link( $contribsPage, wfMessage( 'contribslink' )->escaped(), $attribs );
	}
	$userCanBlock = RequestContext::getMain()->getAuthority()->isAllowed( 'block' );
	if ( $blockable && $userCanBlock ) {
	$items[] = self::blockLink( $userId, $userText );
	}

	if (
	$addEmailLink
	&& MediaWikiServices::getInstance()->getEmailUserFactory()
	->newEmailUser( RequestContext::getMain()->getAuthority() )
	->canSend()
	->isGood()
	) {
	$items[] = self::emailLink( $userId, $userText );
	}

	( new HookRunner( $services->getHookContainer() ) )->onUserToolLinksEdit( $userId, $userText, $items );

	return $items;
	}

	/**
	* Generate standard tool links HTML from a link array returned by userToolLinkArray().
	* @since 1.42
	* @param array $items
	* @param bool $useParentheses (optional, default true) Wrap comments in parentheses where needed
	* @return string
	*/
	public static function renderUserToolLinksArray( array $items, bool $useParentheses ): string {
	global $wgLang;

	if ( !$items ) {
	return '';
	}

	if ( $useParentheses ) {
	return wfMessage( 'word-separator' )->escaped()
	. '<span class="mw-usertoollinks">'
	. wfMessage( 'parentheses' )->rawParams( $wgLang->pipeList( $items ) )->escaped()
	. '</span>';
	}

	$tools = [];
	foreach ( $items as $tool ) {
	$tools[] = Html::rawElement( 'span', [], $tool );
	}
	return ' <span class="mw-usertoollinks mw-changeslist-links">' .
	implode( ' ', $tools ) . '</span>';
	}

	/**
	* Generate standard user tool links (talk, contributions, block link, etc.)
	*
	* @since 1.16.3
	* @param int $userId User identifier
	* @param string $userText User name or IP address
	* @param bool $redContribsWhenNoEdits Should the contributions link be
	* red if the user has no edits?
	* @param int $flags Customisation flags (e.g. Linker::TOOL_LINKS_NOBLOCK
	* and Linker::TOOL_LINKS_EMAIL).
	* @param int\|null $edits User edit count (optional, for performance)
	* @param bool $useParentheses (optional, default true) Wrap comments in parentheses where needed
	* @return string HTML fragment
	*/
	public static function userToolLinks(
	$userId, $userText, $redContribsWhenNoEdits = false, $flags = 0, $edits = null,
	$useParentheses = true
	) {
	if ( $userText === '' ) {
	wfDebug( __METHOD__ . ' received an empty username. Are there database errors ' .
	'that need to be fixed?' );
	return ' ' . wfMessage( 'empty-username' )->parse();
	}

	$items = self::userToolLinkArray( $userId, $userText, $redContribsWhenNoEdits, $flags, $edits );
	return self::renderUserToolLinksArray( $items, $useParentheses );
	}

	/**
	* Alias for userToolLinks( $userId, $userText, true );
	* @since 1.16.3
	* @param int $userId User identifier
	* @param string $userText User name or IP address
	* @param int\|null $edits User edit count (optional, for performance)
	* @param bool $useParentheses (optional) Wrap comments in parentheses where needed
	* @return string
	*/
	public static function userToolLinksRedContribs(
	$userId, $userText, $edits = null, $useParentheses = true
	) {
	return self::userToolLinks( $userId, $userText, true, 0, $edits, $useParentheses );
	}

	/**
	* @since 1.16.3
	* @param int $userId User id in database.
	* @param string $userText User name in database.
	* @return string HTML fragment with user talk link
	*/
	public static function userTalkLink( $userId, $userText ) {
	if ( $userText === '' ) {
	wfDebug( __METHOD__ . ' received an empty username. Are there database errors ' .
	'that need to be fixed?' );
	return wfMessage( 'empty-username' )->parse();
	}

	$userTalkPage = TitleValue::tryNew( NS_USER_TALK, strtr( $userText, ' ', '_' ) );
	$moreLinkAttribs = [ 'class' => 'mw-usertoollinks-talk' ];
	$linkText = wfMessage( 'talkpagelinktext' )->escaped();

	return $userTalkPage
	? self::link( $userTalkPage, $linkText, $moreLinkAttribs )
	: Html::rawElement( 'span', $moreLinkAttribs, $linkText );
	}

	/**
	* @since 1.16.3
	* @param int $userId
	* @param string $userText User name in database.
	* @return string HTML fragment with block link
	*/
	public static function blockLink( $userId, $userText ) {
	if ( $userText === '' ) {
	wfDebug( __METHOD__ . ' received an empty username. Are there database errors ' .
	'that need to be fixed?' );
	return wfMessage( 'empty-username' )->parse();
	}

	$blockPage = SpecialPage::getTitleFor( 'Block', $userText );
	$moreLinkAttribs = [ 'class' => 'mw-usertoollinks-block' ];

	return self::link( $blockPage,
	wfMessage( 'blocklink' )->escaped(),
	$moreLinkAttribs
	);
	}

	/**
	* @param int $userId
	* @param string $userText User name in database.
	* @return string HTML fragment with e-mail user link
	*/
	public static function emailLink( $userId, $userText ) {
	if ( $userText === '' ) {
	wfLogWarning( __METHOD__ . ' received an empty username. Are there database errors ' .
	'that need to be fixed?' );
	return wfMessage( 'empty-username' )->parse();
	}

	$emailPage = SpecialPage::getTitleFor( 'Emailuser', $userText );
	$moreLinkAttribs = [ 'class' => 'mw-usertoollinks-mail' ];
	return self::link( $emailPage,
	wfMessage( 'emaillink' )->escaped(),
	$moreLinkAttribs
	);
	}

	/**
	* Generate a user link if the current user is allowed to view it
	*
	* This method produces HTML that requires CSS styles in mediawiki.interface.helpers.styles.
	*
	* @since 1.16.3
	* @param RevisionRecord $revRecord (Switched from the old Revision class to RevisionRecord
	* since 1.35)
	* @param bool $isPublic Show only if all users can see it
	* @return string HTML fragment
	*/
	public static function revUserLink( RevisionRecord $revRecord, $isPublic = false ) {
	// TODO inject authority
	$authority = RequestContext::getMain()->getAuthority();

	$revUser = $revRecord->getUser(
	$isPublic ? RevisionRecord::FOR_PUBLIC : RevisionRecord::FOR_THIS_USER,
	$authority
	);
	if ( $revUser ) {
	$link = self::userLink( $revUser->getId(), $revUser->getName() );
	} else {
	// User is deleted and we can't (or don't want to) view it
	$link = wfMessage( 'rev-deleted-user' )->escaped();
	}

	if ( $revRecord->isDeleted( RevisionRecord::DELETED_USER ) ) {
	$class = self::getRevisionDeletedClass( $revRecord );
	return '<span class="' . $class . '">' . $link . '</span>';
	}
	return $link;
	}

	/**
	* Returns css class of a deleted revision
	* @param RevisionRecord $revisionRecord
	* @return string 'history-deleted', 'mw-history-suppressed' added if suppressed too
	* @since 1.37
	*/
	public static function getRevisionDeletedClass( RevisionRecord $revisionRecord ): string {
	$class = 'history-deleted';
	if ( $revisionRecord->isDeleted( RevisionRecord::DELETED_RESTRICTED ) ) {
	$class .= ' mw-history-suppressed';
	}
	return $class;
	}

	/**
	* Generate a user tool link cluster if the current user is allowed to view it
	*
	* This method produces HTML that requires CSS styles in mediawiki.interface.helpers.styles.
	*
	* @since 1.16.3
	* @param RevisionRecord $revRecord (Switched from the old Revision class to RevisionRecord
	* since 1.35)
	* @param bool $isPublic Show only if all users can see it
	* @param bool $useParentheses (optional) Wrap comments in parentheses where needed
	* @return string HTML
	*/
	public static function revUserTools(
	RevisionRecord $revRecord,
	$isPublic = false,
	$useParentheses = true
	) {
	// TODO inject authority
	$authority = RequestContext::getMain()->getAuthority();

	$revUser = $revRecord->getUser(
	$isPublic ? RevisionRecord::FOR_PUBLIC : RevisionRecord::FOR_THIS_USER,
	$authority
	);
	if ( $revUser ) {
	$link = self::userLink(
	$revUser->getId(),
	$revUser->getName(),
	false,
	[ 'data-mw-revid' => $revRecord->getId() ]
	) . self::userToolLinks(
	$revUser->getId(),
	$revUser->getName(),
	false,
	0,
	null,
	$useParentheses
	);
	} else {
	// User is deleted and we can't (or don't want to) view it
	$link = wfMessage( 'rev-deleted-user' )->escaped();
	}

	if ( $revRecord->isDeleted( RevisionRecord::DELETED_USER ) ) {
	$class = self::getRevisionDeletedClass( $revRecord );
	return ' <span class="' . $class . ' mw-userlink">' . $link . '</span>';
	}
	return $link;
	}

	/**
	* Helper function to expand local links. Mostly used in action=render
	*
	* @since 1.38
	* @unstable
	*
	* @param string $html
	*
	* @return string HTML
	*/
	public static function expandLocalLinks( string $html ) {
	return HtmlHelper::modifyElements(
	$html,
	static function ( SerializerNode $node ): bool {
	return $node->name === 'a' && isset( $node->attrs['href'] );
	},
	static function ( SerializerNode $node ): SerializerNode {
	$urlUtils = MediaWikiServices::getInstance()->getUrlUtils();
	$node->attrs['href'] =
	$urlUtils->expand( $node->attrs['href'], PROTO_RELATIVE ) ?? false;
	return $node;
	}
	);
	}

	/**
	* @param LinkTarget\|null $contextTitle
	* @param string $target
	* @param string &$text
	* @return string
	*/
	public static function normalizeSubpageLink( $contextTitle, $target, &$text ) {
	# Valid link forms:
	# Foobar -- normal
	# :Foobar -- override special treatment of prefix (images, language links)
	# /Foobar -- convert to CurrentPage/Foobar
	# /Foobar/ -- convert to CurrentPage/Foobar, strip the initial and final / from text
	# ../ -- convert to CurrentPage, from CurrentPage/CurrentSubPage
	# ../Foobar -- convert to CurrentPage/Foobar,
	# (from CurrentPage/CurrentSubPage)
	# ../Foobar/ -- convert to CurrentPage/Foobar, use 'Foobar' as text
	# (from CurrentPage/CurrentSubPage)

	$ret = $target; # default return value is no change

	# Some namespaces don't allow subpages,
	# so only perform processing if subpages are allowed
	if (
	$contextTitle && MediaWikiServices::getInstance()->getNamespaceInfo()->
	hasSubpages( $contextTitle->getNamespace() )
	) {
	$hash = strpos( $target, '#' );
	if ( $hash !== false ) {
	$suffix = substr( $target, $hash );
	$target = substr( $target, 0, $hash );
	} else {
	$suffix = '';
	}
	# T9425
	$target = trim( $target );
	$contextPrefixedText = MediaWikiServices::getInstance()->getTitleFormatter()->
	getPrefixedText( $contextTitle );
	# Look at the first character
	if ( $target != '' && $target[0] === '/' ) {
	# / at end means we don't want the slash to be shown
	$m = [];
	$trailingSlashes = preg_match_all( '%(/+)$%', $target, $m );
	if ( $trailingSlashes ) {
	$noslash = $target = substr( $target, 1, -strlen( $m[0][0] ) );
	} else {
	$noslash = substr( $target, 1 );
	}

	$ret = $contextPrefixedText . '/' . trim( $noslash ) . $suffix;
	if ( $text === '' ) {
	$text = $target . $suffix;
	} # this might be changed for ugliness reasons
	} else {
	# check for .. subpage backlinks
	$dotdotcount = 0;
	$nodotdot = $target;
	while ( str_starts_with( $nodotdot, '../' ) ) {
	++$dotdotcount;
	$nodotdot = substr( $nodotdot, 3 );
	}
	if ( $dotdotcount > 0 ) {
	$exploded = explode( '/', $contextPrefixedText );
	if ( count( $exploded ) > $dotdotcount ) { # not allowed to go below top level page
	$ret = implode( '/', array_slice( $exploded, 0, -$dotdotcount ) );
	# / at the end means don't show full path
	if ( substr( $nodotdot, -1, 1 ) === '/' ) {
	$nodotdot = rtrim( $nodotdot, '/' );
	if ( $text === '' ) {
	$text = $nodotdot . $suffix;
	}
	}
	$nodotdot = trim( $nodotdot );
	if ( $nodotdot != '' ) {
	$ret .= '/' . $nodotdot;
	}
	$ret .= $suffix;
	}
	}
	}
	}

	return $ret;
	}

	/**
	* @since 1.16.3
	* @param int $size
	* @return string
	*/
	public static function formatRevisionSize( $size ) {
	if ( $size == 0 ) {
	$stxt = wfMessage( 'historyempty' )->escaped();
	} else {
	$stxt = wfMessage( 'nbytes' )->numParams( $size )->escaped();
	}
	return "<span class=\"history-size mw-diff-bytes\" data-mw-bytes=\"$size\">$stxt</span>";
	}

	/**
	* Split a link trail, return the "inside" portion and the remainder of the trail
	* as a two-element array
	* @param string $trail
	* @return string[]
	*/
	public static function splitTrail( $trail ) {
	$regex = MediaWikiServices::getInstance()->getContentLanguage()->linkTrail();
	$inside = '';
	if ( $trail !== '' && preg_match( $regex, $trail, $m ) ) {
	[ , $inside, $trail ] = $m;
	}
	return [ $inside, $trail ];
	}

	/**
	* Generate a rollback link for a given revision. Currently it's the
	* caller's responsibility to ensure that the revision is the top one. If
	* it's not, of course, the user will get an error message.
	*
	* If the calling page is called with the parameter &bot=1, all rollback
	* links also get that parameter. It causes the edit itself and the rollback
	* to be marked as "bot" edits. Bot edits are hidden by default from recent
	* changes, so this allows sysops to combat a busy vandal without bothering
	* other users.
	*
	* This function will return the link only in case the revision can be reverted
	* (not all revisions are by the same user, and the last revision by a different
	* user is visible). Please note that due to performance limitations it might be
	* assumed that a user isn't the only contributor of a page while (s)he is, which
	* will lead to useless rollback links. Furthermore this won't work if
	* $wgShowRollbackEditCount is disabled, so this can only function as an
	* additional check.
	*
	* If the option noBrackets is set the rollback link wont be enclosed in "[]".
	*
	* @since 1.16.3. $context added in 1.20. $options added in 1.21
	* $rev could be a RevisionRecord since 1.35
	*
	* @param RevisionRecord $revRecord (Switched from the old Revision class to RevisionRecord
	* since 1.35)
	* @param IContextSource\|null $context Context to use or null for the main context.
	* @param array $options
	* @return string
	*/
	public static function generateRollback(
	RevisionRecord $revRecord,
	?IContextSource $context = null,
	$options = []
	) {
	$context ??= RequestContext::getMain();

	$editCount = self::getRollbackEditCount( $revRecord );
	if ( $editCount === false ) {
	return '';
	}

	$inner = self::buildRollbackLink( $revRecord, $context, $editCount );

	$services = MediaWikiServices::getInstance();
	// Allow extensions to modify the rollback link.
	// Abort further execution if the extension wants full control over the link.
	if ( !( new HookRunner( $services->getHookContainer() ) )->onLinkerGenerateRollbackLink(
	$revRecord, $context, $options, $inner ) ) {
	return $inner;
	}

	if ( !in_array( 'noBrackets', $options, true ) ) {
	$inner = $context->msg( 'brackets' )->rawParams( $inner )->escaped();
	}

	if ( $services->getUserOptionsLookup()
	->getBoolOption( $context->getUser(), 'showrollbackconfirmation' )
	) {
	$services->getStatsFactory()
	->getCounter( 'rollbackconfirmation_event_load_total' )
	->copyToStatsdAt( 'rollbackconfirmation.event.load' )
	->increment();
	$context->getOutput()->addModules( 'mediawiki.misc-authed-curate' );
	}

	return '<span class="mw-rollback-link">' . $inner . '</span>';
	}

	/**
	* This function will return the number of revisions which a rollback
	* would revert and will verify that a revision can be reverted (that
	* the user isn't the only contributor and the revision we might
	* rollback to isn't deleted). These checks can only function as an
	* additional check as this function only checks against the last
	* $wgShowRollbackEditCount edits.
	*
	* Returns null if $wgShowRollbackEditCount is disabled or false if
	* the user is the only contributor of the page.
	*
	* @todo Unused outside of this file - should it be made private?
	*
	* @param RevisionRecord $revRecord (Switched from the old Revision class to RevisionRecord
	* since 1.35)
	* @param bool $verify Deprecated since 1.40, has no effect.
	* @return int\|false\|null
	*/
	public static function getRollbackEditCount( RevisionRecord $revRecord, $verify = true ) {
	if ( func_num_args() > 1 ) {
	wfDeprecated( __METHOD__ . ' with $verify parameter', '1.40' );
	}
	$showRollbackEditCount = MediaWikiServices::getInstance()->getMainConfig()
	->get( MainConfigNames::ShowRollbackEditCount );

	if ( !is_int( $showRollbackEditCount ) \|\| !$showRollbackEditCount > 0 ) {
	// Nothing has happened, indicate this by returning 'null'
	return null;
	}

	$dbr = MediaWikiServices::getInstance()->getConnectionProvider()->getReplicaDatabase();

	// Up to the value of $wgShowRollbackEditCount revisions are counted
	$queryBuilder = MediaWikiServices::getInstance()->getRevisionStore()->newSelectQueryBuilder( $dbr );
	$res = $queryBuilder->where( [ 'rev_page' => $revRecord->getPageId() ] )
	->useIndex( [ 'revision' => 'rev_page_timestamp' ] )
	->orderBy( [ 'rev_timestamp', 'rev_id' ], SelectQueryBuilder::SORT_DESC )
	->limit( $showRollbackEditCount + 1 )
	->caller( __METHOD__ )->fetchResultSet();

	$revUser = $revRecord->getUser( RevisionRecord::RAW );
	$revUserText = $revUser ? $revUser->getName() : '';

	$editCount = 0;
	$moreRevs = false;
	foreach ( $res as $row ) {
	if ( $row->rev_user_text != $revUserText ) {
	if ( $row->rev_deleted & RevisionRecord::DELETED_TEXT
	\|\| $row->rev_deleted & RevisionRecord::DELETED_USER
	) {
	// If the user or the text of the revision we might rollback
	// to is deleted in some way we can't rollback. Similar to
	// the checks in WikiPage::commitRollback.
	return false;
	}
	$moreRevs = true;
	break;
	}
	$editCount++;
	}

	if ( $editCount <= $showRollbackEditCount && !$moreRevs ) {
	// We didn't find at least $wgShowRollbackEditCount revisions made by the current user
	// and there weren't any other revisions. That means that the current user is the only
	// editor, so we can't rollback
	return false;
	}
	return $editCount;
	}

	/**
	* Build a raw rollback link, useful for collections of "tool" links
	*
	* @since 1.16.3. $context added in 1.20. $editCount added in 1.21
	* $rev could be a RevisionRecord since 1.35
	*
	* @todo Unused outside of this file - should it be made private?
	*
	* @param RevisionRecord $revRecord (Switched from the old Revision class to RevisionRecord
	* since 1.35)
	* @param IContextSource\|null $context Context to use or null for the main context.
	* @param int\|false\|null $editCount Number of edits that would be reverted
	* @return string HTML fragment
	*/
	public static function buildRollbackLink(
	RevisionRecord $revRecord,
	?IContextSource $context = null,
	$editCount = false
	) {
	$config = MediaWikiServices::getInstance()->getMainConfig();
	$showRollbackEditCount = $config->get( MainConfigNames::ShowRollbackEditCount );
	$miserMode = $config->get( MainConfigNames::MiserMode );
	// To config which pages are affected by miser mode
	$disableRollbackEditCountSpecialPage = [ 'Recentchanges', 'Watchlist' ];

	$context ??= RequestContext::getMain();

	$title = $revRecord->getPageAsLinkTarget();
	$revUser = $revRecord->getUser();
	$revUserText = $revUser ? $revUser->getName() : '';

	$query = [
	'action' => 'rollback',
	'from' => $revUserText,
	'token' => $context->getUser()->getEditToken( 'rollback' ),
	];

	$attrs = [
	'data-mw' => 'interface',
	'title' => $context->msg( 'tooltip-rollback' )->text()
	];

	$options = [ 'known', 'noclasses' ];

	if ( $context->getRequest()->getBool( 'bot' ) ) {
	// T17999
	$query['hidediff'] = '1';
	$query['bot'] = '1';
	}

	if ( $miserMode ) {
	foreach ( $disableRollbackEditCountSpecialPage as $specialPage ) {
	if ( $context->getTitle()->isSpecial( $specialPage ) ) {
	$showRollbackEditCount = false;
	break;
	}
	}
	}

	// The edit count can be 0 on replica lag, fall back to the generic rollbacklink message
	$msg = [ 'rollbacklink' ];
	if ( is_int( $showRollbackEditCount ) && $showRollbackEditCount > 0 ) {
	if ( !is_numeric( $editCount ) ) {
	$editCount = self::getRollbackEditCount( $revRecord );
	}

	if ( $editCount > $showRollbackEditCount ) {
	$msg = [ 'rollbacklinkcount-morethan', Message::numParam( $showRollbackEditCount ) ];
	} elseif ( $editCount ) {
	$msg = [ 'rollbacklinkcount', Message::numParam( $editCount ) ];
	}
	}

	$html = $context->msg( ...$msg )->parse();
	return self::link( $title, $html, $attrs, $query, $options );
	}

	/**
	* Returns HTML for the "hidden categories on this page" list.
	*
	* @since 1.16.3
	* @param array $hiddencats Array of hidden categories
	* from {@link WikiPage::getHiddenCategories} or similar
	* @return string HTML output
	*/
	public static function formatHiddenCategories( $hiddencats ) {
	$outText = '';
	if ( count( $hiddencats ) > 0 ) {
	# Construct the HTML
	$outText = '<div class="mw-hiddenCategoriesExplanation">';
	$outText .= wfMessage( 'hiddencategories' )->numParams( count( $hiddencats ) )->parseAsBlock();
	$outText .= "</div><ul>\n";

	foreach ( $hiddencats as $titleObj ) {
	# If it's hidden, it must exist - no need to check with a LinkBatch
	$outText .= '<li>'
	. self::link( $titleObj, null, [], [], 'known' )
	. "</li>\n";
	}
	$outText .= '</ul>';
	}
	return $outText;
	}

	/**
	* @return ContextSource
	*/
	private static function getContextFromMain() {
	$context = RequestContext::getMain();
	$context = new DerivativeContext( $context );
	return $context;
	}

	/**
	* Given the id of an interface element, constructs the appropriate title
	* attribute from the system messages. (Note, this is usually the id but
	* isn't always, because sometimes the accesskey needs to go on a different
	* element than the id, for reverse-compatibility, etc.)
	*
	* @since 1.16.3 $msgParams added in 1.27
	* @param string $name Id of the element, minus prefixes.
	* @param string\|array\|null $options Null, string or array with some of the following options:
	* - 'withaccess' to add an access-key hint
	* - 'nonexisting' to add an accessibility hint that page does not exist
	* @param array $msgParams Parameters to pass to the message
	* @param MessageLocalizer\|null $localizer
	*
	* @return string\|false Contents of the title attribute (which you must HTML-
	* escape), or false for no title attribute
	*/
	public static function titleAttrib( $name, $options = null, array $msgParams = [], $localizer = null ) {
	if ( !$localizer ) {
	$localizer = self::getContextFromMain();
	}
	$message = $localizer->msg( "tooltip-$name", $msgParams );
	// Set a default tooltip for subject namespace tabs if that hasn't
	// been defined. See T22126
	if ( !$message->exists() && str_starts_with( $name, 'ca-nstab-' ) ) {
	$message = $localizer->msg( 'tooltip-ca-nstab' );
	}

	if ( $message->isDisabled() ) {
	$tooltip = false;
	} else {
	$tooltip = $message->text();
	# Compatibility: formerly some tooltips had [alt-.] hardcoded
	$tooltip = preg_replace( "/ ?\[alt-.\]$/", '', $tooltip );
	}

	$options = (array)$options;

	if ( in_array( 'nonexisting', $options ) ) {
	$tooltip = $localizer->msg( 'red-link-title', $tooltip ?: '' )->text();
	}
	if ( in_array( 'withaccess', $options ) ) {
	$accesskey = self::accesskey( $name, $localizer );
	if ( $accesskey !== false ) {
	// Should be build the same as in jquery.accessKeyLabel.js
	if ( $tooltip === false \|\| $tooltip === '' ) {
	$tooltip = $localizer->msg( 'brackets', $accesskey )->text();
	} else {
	$tooltip .= $localizer->msg( 'word-separator' )->text();
	$tooltip .= $localizer->msg( 'brackets', $accesskey )->text();
	}
	}
	}

	return $tooltip;
	}

	/** @var (string\|false)[] */
	public static $accesskeycache;

	/**
	* Given the id of an interface element, constructs the appropriate
	* accesskey attribute from the system messages. (Note, this is usually
	* the id but isn't always, because sometimes the accesskey needs to go on
	* a different element than the id, for reverse-compatibility, etc.)
	*
	* @since 1.16.3
	* @param string $name Id of the element, minus prefixes.
	* @param MessageLocalizer\|null $localizer
	* @return string\|false Contents of the accesskey attribute (which you must HTML-
	* escape), or false for no accesskey attribute
	*/
	public static function accesskey( $name, $localizer = null ) {
	if ( !isset( self::$accesskeycache[$name] ) ) {
	if ( !$localizer ) {
	$localizer = self::getContextFromMain();
	}
	$msg = $localizer->msg( "accesskey-$name" );
	// Set a default accesskey for subject namespace tabs if an
	// accesskey has not been defined. See T22126
	if ( !$msg->exists() && str_starts_with( $name, 'ca-nstab-' ) ) {
	$msg = $localizer->msg( 'accesskey-ca-nstab' );
	}
	self::$accesskeycache[$name] = $msg->isDisabled() ? false : $msg->plain();
	}
	return self::$accesskeycache[$name];
	}

	/**
	* Get a revision-deletion link, or disabled link, or nothing, depending
	* on user permissions & the settings on the revision.
	*
	* Will use forward-compatible revision ID in the Special:RevDelete link
	* if possible, otherwise the timestamp-based ID which may break after
	* undeletion.
	*
	* @param Authority $performer
	* @param RevisionRecord $revRecord (Switched from the old Revision class to RevisionRecord
	* since 1.35)
	* @param LinkTarget $title
	* @return string HTML fragment
	*/
	public static function getRevDeleteLink(
	Authority $performer,
	RevisionRecord $revRecord,
	LinkTarget $title
	) {
	$canHide = $performer->isAllowed( 'deleterevision' );
	$canHideHistory = $performer->isAllowed( 'deletedhistory' );
	if ( !$canHide && !( $revRecord->getVisibility() && $canHideHistory ) ) {
	return '';
	}

	if ( !$revRecord->userCan( RevisionRecord::DELETED_RESTRICTED, $performer ) ) {
	return self::revDeleteLinkDisabled( $canHide ); // revision was hidden from sysops
	}
	$prefixedDbKey = MediaWikiServices::getInstance()->getTitleFormatter()->
	getPrefixedDBkey( $title );
	if ( $revRecord->getId() ) {
	// RevDelete links using revision ID are stable across
	// page deletion and undeletion; use when possible.
	$query = [
	'type' => 'revision',
	'target' => $prefixedDbKey,
	'ids' => $revRecord->getId()
	];
	} else {
	// Older deleted entries didn't save a revision ID.
	// We have to refer to these by timestamp, ick!
	$query = [
	'type' => 'archive',
	'target' => $prefixedDbKey,
	'ids' => $revRecord->getTimestamp()
	];
	}
	return self::revDeleteLink(
	$query,
	$revRecord->isDeleted( RevisionRecord::DELETED_RESTRICTED ),
	$canHide
	);
	}

	/**
	* Creates a (show/hide) link for deleting revisions/log entries
	*
	* This method produces HTML that requires CSS styles in mediawiki.interface.helpers.styles.
	*
	* @param array $query Query parameters to be passed to link()
	* @param bool $restricted Set to true to use a "<strong>" instead of a "<span>"
	* @param bool $delete Set to true to use (show/hide) rather than (show)
	*
	* @return string HTML "<a>" link to Special:Revisiondelete, wrapped in a
	* span to allow for customization of appearance with CSS
	*/
	public static function revDeleteLink( $query = [], $restricted = false, $delete = true ) {
	$sp = SpecialPage::getTitleFor( 'Revisiondelete' );
	$msgKey = $delete ? 'rev-delundel' : 'rev-showdeleted';
	$html = wfMessage( $msgKey )->escaped();
	$tag = $restricted ? 'strong' : 'span';
	$link = self::link( $sp, $html, [], $query, [ 'known', 'noclasses' ] );
	return Xml::tags(
	$tag,
	[ 'class' => 'mw-revdelundel-link' ],
	wfMessage( 'parentheses' )->rawParams( $link )->escaped()
	);
	}

	/**
	* Creates a dead (show/hide) link for deleting revisions/log entries
	*
	* This method produces HTML that requires CSS styles in mediawiki.interface.helpers.styles.
	*
	* @since 1.16.3
	* @param bool $delete Set to true to use (show/hide) rather than (show)
	*
	* @return string HTML text wrapped in a span to allow for customization
	* of appearance with CSS
	*/
	public static function revDeleteLinkDisabled( $delete = true ) {
	$msgKey = $delete ? 'rev-delundel' : 'rev-showdeleted';
	$html = wfMessage( $msgKey )->escaped();
	$htmlParentheses = wfMessage( 'parentheses' )->rawParams( $html )->escaped();
	return Xml::tags( 'span', [ 'class' => 'mw-revdelundel-link' ], $htmlParentheses );
	}

	/**
	* Returns the attributes for the tooltip and access key.
	*
	* @since 1.16.3. $msgParams introduced in 1.27
	* @param string $name
	* @param array $msgParams Params for constructing the message
	* @param string\|array\|null $options Options to be passed to titleAttrib.
	* @param MessageLocalizer\|null $localizer
	*
	* @see Linker::titleAttrib for what options could be passed to $options.
	*
	* @return array
	*/
	public static function tooltipAndAccesskeyAttribs(
	$name,
	array $msgParams = [],
	$options = null,
	$localizer = null
	) {
	$options = (array)$options;
	$options[] = 'withaccess';

	// Get optional parameters from global context if any missing.
	if ( !$localizer ) {
	$localizer = self::getContextFromMain();
	}

	$attribs = [
	'title' => self::titleAttrib( $name, $options, $msgParams, $localizer ),
	'accesskey' => self::accesskey( $name, $localizer )
	];
	if ( $attribs['title'] === false ) {
	unset( $attribs['title'] );
	}
	if ( $attribs['accesskey'] === false ) {
	unset( $attribs['accesskey'] );
	}
	return $attribs;
	}

	/**
	* Returns raw bits of HTML, use titleAttrib()
	* @since 1.16.3
	* @param string $name
	* @param array\|null $options
	* @return null\|string
	*/
	public static function tooltip( $name, $options = null ) {
	$tooltip = self::titleAttrib( $name, $options );
	if ( $tooltip === false ) {
	return '';
	}
	return Xml::expandAttributes( [
	'title' => $tooltip
	] );
	}

	}

	/** @deprecated class alias since 1.40 */
	class_alias( Linker::class, 'Linker' );

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