';
+ }
+
+ return $text;
+ }
+
+ /**
+ * Display a page stating that the Wiki is in read-only mode,
+ * and optionally show the source of the page that the user
+ * was trying to edit. Should only be called (for this
+ * purpose) after wfReadOnly() has returned true.
+ *
+ * For historical reasons, this function is _also_ used to
+ * show the error message when a user tries to edit a page
+ * they are not allowed to edit. (Unless it's because they're
+ * blocked, then we show blockedPage() instead.) In this
+ * case, the second parameter should be set to true and a list
+ * of reasons supplied as the third parameter.
+ *
+ * @todo Needs to be split into multiple functions.
+ *
+ * @param string $source Source code to show (or null).
+ * @param bool $protected Is this a permissions error?
+ * @param array $reasons List of reasons for this error, as returned by Title::getUserPermissionsErrors().
+ */
+ public function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
+ global $wgUser, $wgTitle;
+ $skin = $wgUser->getSkin();
+
+ $this->setRobotPolicy( 'noindex,nofollow' );
$this->setArticleRelated( false );
- if( $protected ) {
- $skin = $wgUser->getSkin();
- $this->setPageTitle( wfMsg( 'viewsource' ) );
- $this->setSubtitle( wfMsg( 'viewsourcefor', $skin->makeKnownLinkObj( $wgTitle ) ) );
-
- # Determine if protection is due to the page being a system message
- # and show an appropriate explanation
- if( $wgTitle->getNamespace() == NS_MEDIAWIKI && !$wgUser->isAllowed( 'editinterface' ) ) {
- $this->addWikiText( wfMsg( 'protectedinterface' ) );
+ // If no reason is given, just supply a default "I can't let you do
+ // that, Dave" message. Should only occur if called by legacy code.
+ if ( $protected && empty($reasons) ) {
+ $reasons[] = array( 'badaccess-group0' );
+ }
+
+ if ( !empty($reasons) ) {
+ // Permissions error
+ if( $source ) {
+ $this->setPageTitle( wfMsg( 'viewsource' ) );
+ $this->setSubtitle( wfMsg( 'viewsourcefor', $skin->makeKnownLinkObj( $wgTitle ) ) );
} else {
- $this->addWikiText( wfMsg( 'protectedtext' ) );
+ $this->setPageTitle( wfMsg( 'badaccess' ) );
}
+ $this->addWikiText( $this->formatPermissionsErrorMessage( $reasons, $action ) );
} else {
+ // Wiki is read only
$this->setPageTitle( wfMsg( 'readonly' ) );
- if ( $wgReadOnly ) {
- $reason = $wgReadOnly;
- } else {
- $reason = file_get_contents( $wgReadOnlyFile );
- }
- $this->addWikiText( wfMsg( 'readonlytext', $reason ) );
+ $reason = wfReadOnlyReason();
+ $this->addWikiMsg( 'readonlytext', $reason );
}
+ // Show source, if supplied
if( is_string( $source ) ) {
- if( strcmp( $source, '' ) == 0 ) {
- global $wgTitle;
- if ( $wgTitle->getNamespace() == NS_MEDIAWIKI ) {
- $source = wfMsgWeirdKey ( $wgTitle->getText() );
- } else {
- $source = '';
- }
- }
- $rows = $wgUser->getIntOption( 'rows' );
- $cols = $wgUser->getIntOption( 'cols' );
-
- $text = "\n";
+ $this->addWikiMsg( 'viewsourcetext' );
+ $text = Xml::openElement( 'textarea',
+ array( 'id' => 'wpTextbox1',
+ 'name' => 'wpTextbox1',
+ 'cols' => $wgUser->getOption( 'cols' ),
+ 'rows' => $wgUser->getOption( 'rows' ),
+ 'readonly' => 'readonly' ) );
+ $text .= htmlspecialchars( $source );
+ $text .= Xml::closeElement( 'textarea' );
$this->addHTML( $text );
+
+ // Show templates used by this article
+ $skin = $wgUser->getSkin();
+ $article = new Article( $wgTitle );
+ $this->addHTML( "
+" );
}
- $this->returnToMain( false );
+ # If the title doesn't exist, it's fairly pointless to print a return
+ # link to it. After all, you just tried editing it and couldn't, so
+ # what's there to do there?
+ if( $wgTitle->exists() ) {
+ $this->returnToMain( null, $wgTitle );
+ }
}
- /** @obsolete */
- function fatalError( $message ) {
- throw new FatalError( $message );
+ /** @deprecated */
+ public function fatalError( $message ) {
+ wfDeprecated( __METHOD__ );
+ throw new FatalError( $message );
}
-
- /** @obsolete */
- function unexpectedValueError( $name, $val ) {
+
+ /** @deprecated */
+ public function unexpectedValueError( $name, $val ) {
+ wfDeprecated( __METHOD__ );
throw new FatalError( wfMsg( 'unexpected', $name, $val ) );
}
- /** @obsolete */
- function fileCopyError( $old, $new ) {
+ /** @deprecated */
+ public function fileCopyError( $old, $new ) {
+ wfDeprecated( __METHOD__ );
throw new FatalError( wfMsg( 'filecopyerror', $old, $new ) );
}
- /** @obsolete */
- function fileRenameError( $old, $new ) {
+ /** @deprecated */
+ public function fileRenameError( $old, $new ) {
+ wfDeprecated( __METHOD__ );
throw new FatalError( wfMsg( 'filerenameerror', $old, $new ) );
}
- /** @obsolete */
- function fileDeleteError( $name ) {
+ /** @deprecated */
+ public function fileDeleteError( $name ) {
+ wfDeprecated( __METHOD__ );
throw new FatalError( wfMsg( 'filedeleteerror', $name ) );
}
- /** @obsolete */
- function fileNotFoundError( $name ) {
+ /** @deprecated */
+ public function fileNotFoundError( $name ) {
+ wfDeprecated( __METHOD__ );
throw new FatalError( wfMsg( 'filenotfound', $name ) );
}
- function showFatalError( $message ) {
+ public function showFatalError( $message ) {
$this->setPageTitle( wfMsg( "internalerror" ) );
- $this->setRobotpolicy( "noindex,nofollow" );
+ $this->setRobotPolicy( "noindex,nofollow" );
$this->setArticleRelated( false );
$this->enableClientCache( false );
$this->mRedirect = '';
$this->mBodytext = $message;
}
- function showUnexpectedValueError( $name, $val ) {
+ public function showUnexpectedValueError( $name, $val ) {
$this->showFatalError( wfMsg( 'unexpected', $name, $val ) );
}
- function showFileCopyError( $old, $new ) {
+ public function showFileCopyError( $old, $new ) {
$this->showFatalError( wfMsg( 'filecopyerror', $old, $new ) );
}
- function showFileRenameError( $old, $new ) {
+ public function showFileRenameError( $old, $new ) {
$this->showFatalError( wfMsg( 'filerenameerror', $old, $new ) );
}
- function showFileDeleteError( $name ) {
+ public function showFileDeleteError( $name ) {
$this->showFatalError( wfMsg( 'filedeleteerror', $name ) );
}
- function showFileNotFoundError( $name ) {
+ public function showFileNotFoundError( $name ) {
$this->showFatalError( wfMsg( 'filenotfound', $name ) );
}
/**
- * return from error messages or notes
- * @param $auto automatically redirect the user after 10 seconds
- * @param $returnto page title to return to. Default is Main Page.
+ * Add a "return to" link pointing to a specified title
+ *
+ * @param Title $title Title to link
*/
- function returnToMain( $auto = true, $returnto = NULL ) {
- global $wgUser, $wgOut, $wgRequest;
-
+ public function addReturnTo( $title ) {
+ global $wgUser;
+ $link = wfMsg( 'returnto', $wgUser->getSkin()->makeLinkObj( $title ) );
+ $this->addHtml( "
{$link}
\n" );
+ }
+
+ /**
+ * Add a "return to" link pointing to a specified title,
+ * or the title indicated in the request, or else the main page
+ *
+ * @param null $unused No longer used
+ * @param Title $returnto Title to return to
+ */
+ public function returnToMain( $unused = null, $returnto = NULL ) {
+ global $wgRequest;
+
if ( $returnto == NULL ) {
$returnto = $wgRequest->getText( 'returnto' );
}
-
+
if ( '' === $returnto ) {
- $returnto = wfMsgForContent( 'mainpage' );
+ $returnto = Title::newMainPage();
}
if ( is_object( $returnto ) ) {
@@ -926,21 +1388,16 @@ class OutputPage {
$titleObj = Title::newMainPage();
}
- $sk = $wgUser->getSkin();
- $link = $sk->makeLinkObj( $titleObj, '' );
-
- $r = wfMsg( 'returnto', $link );
- if ( $auto ) {
- $wgOut->addMeta( 'http:Refresh', '10;url=' . $titleObj->escapeFullURL() );
- }
- $wgOut->addHTML( "\n
$r
\n" );
+ $this->addReturnTo( $titleObj );
}
/**
* This function takes the title (first item of mGoodLinks), categories, existing and broken links for the page
* and uses the first 10 of them for META keywords
+ *
+ * @param ParserOutput &$parserOutput
*/
- function addKeywords( &$parserOutput ) {
+ private function addKeywords( &$parserOutput ) {
global $wgTitle;
$this->addKeyword( $wgTitle->getPrefixedText() );
$count = 1;
@@ -948,8 +1405,8 @@ class OutputPage {
if ( !is_array( $links2d ) ) {
return;
}
- foreach ( $links2d as $ns => $dbkeys ) {
- foreach( $dbkeys as $dbkey => $id ) {
+ foreach ( $links2d as $dbkeys ) {
+ foreach( $dbkeys as $dbkey => $unused ) {
$this->addKeyword( $dbkey );
if ( ++$count > 10 ) {
break 2;
@@ -959,17 +1416,21 @@ class OutputPage {
}
/**
- * @access private
- * @return string
+ * @return string The doctype, opening , and head element.
*/
- function headElement() {
+ public function headElement( Skin $sk ) {
global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
- global $wgUser, $wgContLang, $wgUseTrackbacks, $wgTitle;
+ global $wgXhtmlDefaultNamespace, $wgXhtmlNamespaces;
+ global $wgUser, $wgContLang, $wgUseTrackbacks, $wgTitle, $wgStyleVersion;
+
+ $this->addMeta( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" );
+ $this->addStyle( 'common/wikiprintable.css', 'print' );
+ $sk->setupUserCss( $this );
+
+ $ret = '';
if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
- $ret = "\n";
- } else {
- $ret = '';
+ $ret .= "\n";
}
$ret .= "\n";
@@ -979,24 +1440,22 @@ class OutputPage {
}
$rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
- $ret .= "\n";
- $ret .= "\n" . htmlspecialchars( $this->getHTMLTitle() ) . "\n";
- array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
-
- $ret .= $this->getHeadLinks();
- global $wgStylePath;
- if( $this->isPrintable() ) {
- $media = '';
- } else {
- $media = "media='print'";
+ $ret .= " $ns) {
+ $ret .= "xmlns:{$tag}=\"{$ns}\" ";
+ }
+ $ret .= "xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" $rtl>\n";
+ $ret .= "\n" . htmlspecialchars( $this->getHTMLTitle() ) . "\n\t\t";
+ $ret .= implode( "\t\t", array(
+ $this->getHeadLinks(),
+ $this->buildCssLinks(),
+ $sk->getHeadScripts( $this->mAllowUserJs ),
+ $this->mScripts,
+ $this->getHeadItems(),
+ ));
+ if( $sk->usercss ){
+ $ret .= "";
}
- $printsheet = htmlspecialchars( "$wgStylePath/common/wikiprintable.css" );
- $ret .= "\n";
-
- $sk = $wgUser->getSkin();
- $ret .= $sk->getHeadScripts();
- $ret .= $this->mScripts;
- $ret .= $sk->getUserStyles();
if ($wgUseTrackbacks && $this->isArticleRelated())
$ret .= $wgTitle->trackbackRDF();
@@ -1004,10 +1463,38 @@ class OutputPage {
$ret .= "\n";
return $ret;
}
+
+ protected function addDefaultMeta() {
+ global $wgVersion;
+ $this->addMeta( "generator", "MediaWiki $wgVersion" );
+
+ $p = "{$this->mIndexPolicy},{$this->mFollowPolicy}";
+ if( $p !== 'index,follow' ) {
+ // http://www.robotstxt.org/wc/meta-user.html
+ // Only show if it's different from the default robots policy
+ $this->addMeta( 'robots', $p );
+ }
+
+ if ( count( $this->mKeywords ) > 0 ) {
+ $strip = array(
+ "/<.*?>/" => '',
+ "/_/" => ' '
+ );
+ $this->addMeta( 'keywords', preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ) ) );
+ }
+ }
- function getHeadLinks() {
- global $wgRequest;
- $ret = '';
+ /**
+ * @return string HTML tag links to be put in the header.
+ */
+ public function getHeadLinks() {
+ global $wgRequest, $wgFeed;
+
+ // Ideally this should happen earlier, somewhere. :P
+ $this->addDefaultMeta();
+
+ $tags = array();
+
foreach ( $this->mMetatags as $tag ) {
if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
$a = 'http-equiv';
@@ -1015,64 +1502,323 @@ class OutputPage {
} else {
$a = 'name';
}
- $ret .= "\n";
+ $tags[] = Xml::element( 'meta',
+ array(
+ $a => $tag[0],
+ 'content' => $tag[1] ) );
+ }
+ foreach ( $this->mLinktags as $tag ) {
+ $tags[] = Xml::element( 'link', $tag );
}
- $p = $this->mRobotpolicy;
- if( $p !== '' && $p != 'index,follow' ) {
- // http://www.robotstxt.org/wc/meta-user.html
- // Only show if it's different from the default robots policy
- $ret .= "\n";
+ if( $wgFeed ) {
+ global $wgTitle;
+ foreach( $this->getSyndicationLinks() as $format => $link ) {
+ # Use the page name for the title (accessed through $wgTitle since
+ # there's no other way). In principle, this could lead to issues
+ # with having the same name for different feeds corresponding to
+ # the same page, but we can't avoid that at this low a level.
+
+ $tags[] = $this->feedLink(
+ $format,
+ $link,
+ wfMsg( "page-{$format}-feed", $wgTitle->getPrefixedText() ) ); # Used messages: 'page-rss-feed' and 'page-atom-feed' (for an easier grep)
+ }
+
+ # Recent changes feed should appear on every page (except recentchanges,
+ # that would be redundant). Put it after the per-page feed to avoid
+ # changing existing behavior. It's still available, probably via a
+ # menu in your browser. Some sites might have a different feed they'd
+ # like to promote instead of the RC feed (maybe like a "Recent New Articles"
+ # or "Breaking news" one). For this, we see if $wgOverrideSiteFeed is defined.
+ # If so, use it instead.
+
+ global $wgOverrideSiteFeed, $wgSitename;
+ $rctitle = SpecialPage::getTitleFor( 'Recentchanges' );
+
+ if ( $wgOverrideSiteFeed ) {
+ foreach ( $wgOverrideSiteFeed as $type => $feedUrl ) {
+ $tags[] = $this->feedLink (
+ $type,
+ htmlspecialchars( $feedUrl ),
+ wfMsg( "site-{$type}-feed", $wgSitename ) );
+ }
+ }
+ else if ( $wgTitle->getPrefixedText() != $rctitle->getPrefixedText() ) {
+ $tags[] = $this->feedLink(
+ 'rss',
+ $rctitle->getFullURL( 'feed=rss' ),
+ wfMsg( 'site-rss-feed', $wgSitename ) );
+ $tags[] = $this->feedLink(
+ 'atom',
+ $rctitle->getFullURL( 'feed=atom' ),
+ wfMsg( 'site-atom-feed', $wgSitename ) );
+ }
}
- if ( count( $this->mKeywords ) > 0 ) {
- $strip = array(
- "/<.*?>/" => '',
- "/_/" => ' '
- );
- $ret .= "mKeywords ))) . "\" />\n";
+ return implode( "\n\t\t", $tags ) . "\n";
+ }
+
+ /**
+ * Return URLs for each supported syndication format for this page.
+ * @return array associating format keys with URLs
+ */
+ public function getSyndicationLinks() {
+ global $wgTitle, $wgFeedClasses;
+ $links = array();
+
+ if( $this->isSyndicated() ) {
+ if( is_string( $this->getFeedAppendQuery() ) ) {
+ $appendQuery = "&" . $this->getFeedAppendQuery();
+ } else {
+ $appendQuery = "";
+ }
+
+ foreach( $wgFeedClasses as $format => $class ) {
+ $links[$format] = $wgTitle->getLocalUrl( "feed=$format{$appendQuery}" );
+ }
}
- foreach ( $this->mLinktags as $tag ) {
- $ret .= ' $val ) {
- $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
+ return $links;
+ }
+
+ /**
+ * Generate a for an RSS feed.
+ */
+ private function feedLink( $type, $url, $text ) {
+ return Xml::element( 'link', array(
+ 'rel' => 'alternate',
+ 'type' => "application/$type+xml",
+ 'title' => $text,
+ 'href' => $url ) );
+ }
+
+ /**
+ * Add a local or specified stylesheet, with the given media options.
+ * Meant primarily for internal use...
+ *
+ * @param $media -- to specify a media type, 'screen', 'printable', 'handheld' or any.
+ * @param $conditional -- for IE conditional comments, specifying an IE version
+ * @param $dir -- set to 'rtl' or 'ltr' for direction-specific sheets
+ */
+ public function addStyle( $style, $media='', $condition='', $dir='' ) {
+ $options = array();
+ if( $media )
+ $options['media'] = $media;
+ if( $condition )
+ $options['condition'] = $condition;
+ if( $dir )
+ $options['dir'] = $dir;
+ $this->styles[$style] = $options;
+ }
+
+ /**
+ * Build a set of s for the stylesheets specified in the $this->styles array.
+ * These will be applied to various media & IE conditionals.
+ */
+ public function buildCssLinks() {
+ $links = array();
+ foreach( $this->styles as $file => $options ) {
+ $link = $this->styleLink( $file, $options );
+ if( $link )
+ $links[] = $link;
+ }
+
+ return implode( "\n\t\t", $links );
+ }
+
+ protected function styleLink( $style, $options ) {
+ global $wgRequest;
+
+ if( isset( $options['dir'] ) ) {
+ global $wgContLang;
+ $siteDir = $wgContLang->isRTL() ? 'rtl' : 'ltr';
+ if( $siteDir != $options['dir'] )
+ return '';
+ }
+
+ if( isset( $options['media'] ) ) {
+ $media = $this->transformCssMedia( $options['media'] );
+ if( is_null( $media ) ) {
+ return '';
}
- $ret .= " />\n";
+ } else {
+ $media = '';
}
- if( $this->isSyndicated() ) {
- # FIXME: centralize the mime-type and name information in Feed.php
- $link = $wgRequest->escapeAppendQuery( 'feed=rss' );
- $ret .= "\n";
- $link = $wgRequest->escapeAppendQuery( 'feed=atom' );
- $ret .= "\n";
+
+ if( substr( $style, 0, 1 ) == '/' ||
+ substr( $style, 0, 5 ) == 'http:' ||
+ substr( $style, 0, 6 ) == 'https:' ) {
+ $url = $style;
+ } else {
+ global $wgStylePath, $wgStyleVersion;
+ $url = $wgStylePath . '/' . $style . '?' . $wgStyleVersion;
}
- return $ret;
+ $attribs = array(
+ 'rel' => 'stylesheet',
+ 'href' => $url,
+ 'type' => 'text/css' );
+ if( $media ) {
+ $attribs['media'] = $media;
+ }
+
+ $link = Xml::element( 'link', $attribs );
+
+ if( isset( $options['condition'] ) ) {
+ $condition = htmlspecialchars( $options['condition'] );
+ $link = "";
+ }
+ return $link;
+ }
+
+ function transformCssMedia( $media ) {
+ global $wgRequest, $wgHandheldForIPhone;
+
+ // Switch in on-screen display for media testing
+ $switches = array(
+ 'printable' => 'print',
+ 'handheld' => 'handheld',
+ );
+ foreach( $switches as $switch => $targetMedia ) {
+ if( $wgRequest->getBool( $switch ) ) {
+ if( $media == $targetMedia ) {
+ $media = '';
+ } elseif( $media == 'screen' ) {
+ return null;
+ }
+ }
+ }
+
+ // Expand longer media queries as iPhone doesn't grok 'handheld'
+ if( $wgHandheldForIPhone ) {
+ $mediaAliases = array(
+ 'screen' => 'screen and (min-device-width: 481px)',
+ 'handheld' => 'handheld, only screen and (max-device-width: 480px)',
+ );
+
+ if( isset( $mediaAliases[$media] ) ) {
+ $media = $mediaAliases[$media];
+ }
+ }
+
+ return $media;
}
/**
* Turn off regular page output and return an error reponse
* for when rate limiting has triggered.
- * @todo i18n
- * @access public
*/
- function rateLimited() {
- global $wgOut;
- $wgOut->disable();
- wfHttpError( 500, 'Internal Server Error',
- 'Sorry, the server has encountered an internal error. ' .
- 'Please wait a moment and hit "refresh" to submit the request again.' );
+ public function rateLimited() {
+ global $wgTitle;
+
+ $this->setPageTitle(wfMsg('actionthrottled'));
+ $this->setRobotPolicy( 'noindex,follow' );
+ $this->setArticleRelated( false );
+ $this->enableClientCache( false );
+ $this->mRedirect = '';
+ $this->clearHTML();
+ $this->setStatusCode(503);
+ $this->addWikiMsg( 'actionthrottledtext' );
+
+ $this->returnToMain( null, $wgTitle );
}
-
+
/**
* Show an "add new section" link?
*
- * @return bool True if the parser output instructs us to add one
+ * @return bool
*/
- function showNewSectionLink() {
+ public function showNewSectionLink() {
return $this->mNewSectionLink;
}
+ /**
+ * Show a warning about slave lag
+ *
+ * If the lag is higher than $wgSlaveLagCritical seconds,
+ * then the warning is a bit more obvious. If the lag is
+ * lower than $wgSlaveLagWarning, then no warning is shown.
+ *
+ * @param int $lag Slave lag
+ */
+ public function showLagWarning( $lag ) {
+ global $wgSlaveLagWarning, $wgSlaveLagCritical;
+ if( $lag >= $wgSlaveLagWarning ) {
+ $message = $lag < $wgSlaveLagCritical
+ ? 'lag-warn-normal'
+ : 'lag-warn-high';
+ $warning = wfMsgExt( $message, 'parse', $lag );
+ $this->addHtml( "
\n{$warning}\n
\n" );
+ }
+ }
+
+ /**
+ * Add a wikitext-formatted message to the output.
+ * This is equivalent to:
+ *
+ * $wgOut->addWikiText( wfMsgNoTrans( ... ) )
+ */
+ public function addWikiMsg( /*...*/ ) {
+ $args = func_get_args();
+ $name = array_shift( $args );
+ $this->addWikiMsgArray( $name, $args );
+ }
+
+ /**
+ * Add a wikitext-formatted message to the output.
+ * Like addWikiMsg() except the parameters are taken as an array
+ * instead of a variable argument list.
+ *
+ * $options is passed through to wfMsgExt(), see that function for details.
+ */
+ public function addWikiMsgArray( $name, $args, $options = array() ) {
+ $options[] = 'parse';
+ $text = wfMsgExt( $name, $options, $args );
+ $this->addHTML( $text );
+ }
+
+ /**
+ * This function takes a number of message/argument specifications, wraps them in
+ * some overall structure, and then parses the result and adds it to the output.
+ *
+ * In the $wrap, $1 is replaced with the first message, $2 with the second, and so
+ * on. The subsequent arguments may either be strings, in which case they are the
+ * message names, or an arrays, in which case the first element is the message name,
+ * and subsequent elements are the parameters to that message.
+ *
+ * The special named parameter 'options' in a message specification array is passed
+ * through to the $options parameter of wfMsgExt().
+ *
+ * Don't use this for messages that are not in users interface language.
+ *
+ * For example:
+ *
+ * $wgOut->wrapWikiMsg( '
$1
', 'some-error' );
+ *
+ * Is equivalent to:
+ *
+ * $wgOut->addWikiText( '