includes/skins/Skin.php

   1 <?php
   2 /**
   3  * Base class for all skins.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * @defgroup Skins Skins
  25  */
  26
  27 /**
  28  * The main skin class which provides methods and properties for all other skins.
  29  *
  30  * See docs/skin.txt for more information.
  31  *
  32  * @ingroup Skins
  33  */
  34 abstract class Skin extends ContextSource {
  35         protected $skinname = null;
  36         protected $mRelevantTitle = null;
  37         protected $mRelevantUser = null;
  38
  39         /**
  40          * @var string Stylesheets set to use. Subdirectory in skins/ where various stylesheets are
  41          *   located. Only needs to be set if you intend to use the getSkinStylePath() method.
  42          */
  43         public $stylename = null;
  44
  45         /**
  46          * Fetch the set of available skins.
  47          * @return array Associative array of strings
  48          */
  49         static function getSkinNames() {
  50                 return SkinFactory::getDefaultInstance()->getSkinNames();
  51         }
  52
  53         /**
  54          * Fetch the skinname messages for available skins.
  55          * @return string[]
  56          */
  57         static function getSkinNameMessages() {
  58                 $messages = [];
  59                 foreach ( self::getSkinNames() as $skinKey => $skinName ) {
  60                         $messages[] = "skinname-$skinKey";
  61                 }
  62                 return $messages;
  63         }
  64
  65         /**
  66          * Fetch the list of user-selectable skins in regards to $wgSkipSkins.
  67          * Useful for Special:Preferences and other places where you
  68          * only want to show skins users _can_ use.
  69          * @return string[]
  70          * @since 1.23
  71          */
  72         public static function getAllowedSkins() {
  73                 global $wgSkipSkins;
  74
  75                 $allowedSkins = self::getSkinNames();
  76
  77                 foreach ( $wgSkipSkins as $skip ) {
  78                         unset( $allowedSkins[$skip] );
  79                 }
  80
  81                 return $allowedSkins;
  82         }
  83
  84         /**
  85          * Normalize a skin preference value to a form that can be loaded.
  86          *
  87          * If a skin can't be found, it will fall back to the configured default ($wgDefaultSkin), or the
  88          * hardcoded default ($wgFallbackSkin) if the default skin is unavailable too.
  89          *
  90          * @param string $key 'monobook', 'vector', etc.
  91          * @return string
  92          */
  93         static function normalizeKey( $key ) {
  94                 global $wgDefaultSkin, $wgFallbackSkin;
  95
  96                 $skinNames = Skin::getSkinNames();
  97
  98                 // Make keys lowercase for case-insensitive matching.
  99                 $skinNames = array_change_key_case( $skinNames, CASE_LOWER );
 100                 $key = strtolower( $key );
 101                 $defaultSkin = strtolower( $wgDefaultSkin );
 102                 $fallbackSkin = strtolower( $wgFallbackSkin );
 103
 104                 if ( $key == '' || $key == 'default' ) {
 105                         // Don't return the default immediately;
 106                         // in a misconfiguration we need to fall back.
 107                         $key = $defaultSkin;
 108                 }
 109
 110                 if ( isset( $skinNames[$key] ) ) {
 111                         return $key;
 112                 }
 113
 114                 // Older versions of the software used a numeric setting
 115                 // in the user preferences.
 116                 $fallback = [
 117                         0 => $defaultSkin,
 118                         2 => 'cologneblue'
 119                 ];
 120
 121                 if ( isset( $fallback[$key] ) ) {
 122                         $key = $fallback[$key];
 123                 }
 124
 125                 if ( isset( $skinNames[$key] ) ) {
 126                         return $key;
 127                 } elseif ( isset( $skinNames[$defaultSkin] ) ) {
 128                         return $defaultSkin;
 129                 } else {
 130                         return $fallbackSkin;
 131                 }
 132         }
 133
 134         /**
 135          * @return string Skin name
 136          */
 137         public function getSkinName() {
 138                 return $this->skinname;
 139         }
 140
 141         /**
 142          * @param OutputPage $out
 143          */
 144         public function initPage( OutputPage $out ) {
 145                 $this->preloadExistence();
 146         }
 147
 148         /**
 149          * Defines the ResourceLoader modules that should be added to the skin
 150          * It is recommended that skins wishing to override call parent::getDefaultModules()
 151          * and substitute out any modules they wish to change by using a key to look them up
 152          *
 153          * For style modules, use setupSkinUserCss() instead.
 154          *
 155          * @return array Array of modules with helper keys for easy overriding
 156          */
 157         public function getDefaultModules() {
 158                 global $wgUseAjax, $wgEnableAPI, $wgEnableWriteAPI;
 159
 160                 $out = $this->getOutput();
 161                 $user = $out->getUser();
 162                 $modules = [
 163                         // modules that enhance the page content in some way
 164                         'content' => [
 165                                 'mediawiki.page.ready',
 166                         ],
 167                         // modules that exist for legacy reasons
 168                         'legacy' => ResourceLoaderStartUpModule::getLegacyModules(),
 169                         // modules relating to search functionality
 170                         'search' => [],
 171                         // modules relating to functionality relating to watching an article
 172                         'watch' => [],
 173                         // modules which relate to the current users preferences
 174                         'user' => [],
 175                 ];
 176
 177                 // Preload jquery.tablesorter for mediawiki.page.ready
 178                 if ( strpos( $out->getHTML(), 'sortable' ) !== false ) {
 179                         $modules['content'][] = 'jquery.tablesorter';
 180                 }
 181
 182                 // Preload jquery.makeCollapsible for mediawiki.page.ready
 183                 if ( strpos( $out->getHTML(), 'mw-collapsible' ) !== false ) {
 184                         $modules['content'][] = 'jquery.makeCollapsible';
 185                 }
 186
 187                 // Add various resources if required
 188                 if ( $wgUseAjax && $wgEnableAPI ) {
 189                         if ( $wgEnableWriteAPI && $user->isLoggedIn()
 190                                 && $user->isAllowedAll( 'writeapi', 'viewmywatchlist', 'editmywatchlist' )
 191                                 && $this->getRelevantTitle()->canExist()
 192                         ) {
 193                                 $modules['watch'][] = 'mediawiki.page.watch.ajax';
 194                         }
 195
 196                         $modules['search'][] = 'mediawiki.searchSuggest';
 197                 }
 198
 199                 if ( $user->getBoolOption( 'editsectiononrightclick' ) ) {
 200                         $modules['user'][] = 'mediawiki.action.view.rightClickEdit';
 201                 }
 202
 203                 // Crazy edit-on-double-click stuff
 204                 if ( $out->isArticle() && $user->getOption( 'editondblclick' ) ) {
 205                         $modules['user'][] = 'mediawiki.action.view.dblClickEdit';
 206                 }
 207                 return $modules;
 208         }
 209
 210         /**
 211          * Preload the existence of three commonly-requested pages in a single query
 212          */
 213         protected function preloadExistence() {
 214                 $titles = [];
 215
 216                 // User/talk link
 217                 $user = $this->getUser();
 218                 if ( $user->isLoggedIn() ) {
 219                         $titles[] = $user->getUserPage();
 220                         $titles[] = $user->getTalkPage();
 221                 }
 222
 223                 // Check, if the page can hold some kind of content, otherwise do nothing
 224                 $title = $this->getRelevantTitle();
 225                 if ( $title->canExist() ) {
 226                         if ( $title->isTalkPage() ) {
 227                                 $titles[] = $title->getSubjectPage();
 228                         } else {
 229                                 $titles[] = $title->getTalkPage();
 230                         }
 231                 }
 232
 233                 // Footer links (used by SkinTemplate::prepareQuickTemplate)
 234                 foreach ( [
 235                         $this->footerLinkTitle( 'privacy', 'privacypage' ),
 236                         $this->footerLinkTitle( 'aboutsite', 'aboutpage' ),
 237                         $this->footerLinkTitle( 'disclaimers', 'disclaimerpage' ),
 238                 ] as $title ) {
 239                         if ( $title ) {
 240                                 $titles[] = $title;
 241                         }
 242                 }
 243
 244                 Hooks::run( 'SkinPreloadExistence', [ &$titles, $this ] );
 245
 246                 if ( $titles ) {
 247                         $lb = new LinkBatch( $titles );
 248                         $lb->setCaller( __METHOD__ );
 249                         $lb->execute();
 250                 }
 251         }
 252
 253         /**
 254          * Get the current revision ID
 255          *
 256          * @return int
 257          */
 258         public function getRevisionId() {
 259                 return $this->getOutput()->getRevisionId();
 260         }
 261
 262         /**
 263          * Whether the revision displayed is the latest revision of the page
 264          *
 265          * @return bool
 266          */
 267         public function isRevisionCurrent() {
 268                 $revID = $this->getRevisionId();
 269                 return $revID == 0 || $revID == $this->getTitle()->getLatestRevID();
 270         }
 271
 272         /**
 273          * Set the "relevant" title
 274          * @see self::getRelevantTitle()
 275          * @param Title $t
 276          */
 277         public function setRelevantTitle( $t ) {
 278                 $this->mRelevantTitle = $t;
 279         }
 280
 281         /**
 282          * Return the "relevant" title.
 283          * A "relevant" title is not necessarily the actual title of the page.
 284          * Special pages like Special:MovePage use set the page they are acting on
 285          * as their "relevant" title, this allows the skin system to display things
 286          * such as content tabs which belong to to that page instead of displaying
 287          * a basic special page tab which has almost no meaning.
 288          *
 289          * @return Title
 290          */
 291         public function getRelevantTitle() {
 292                 if ( isset( $this->mRelevantTitle ) ) {
 293                         return $this->mRelevantTitle;
 294                 }
 295                 return $this->getTitle();
 296         }
 297
 298         /**
 299          * Set the "relevant" user
 300          * @see self::getRelevantUser()
 301          * @param User $u
 302          */
 303         public function setRelevantUser( $u ) {
 304                 $this->mRelevantUser = $u;
 305         }
 306
 307         /**
 308          * Return the "relevant" user.
 309          * A "relevant" user is similar to a relevant title. Special pages like
 310          * Special:Contributions mark the user which they are relevant to so that
 311          * things like the toolbox can display the information they usually are only
 312          * able to display on a user's userpage and talkpage.
 313          * @return User
 314          */
 315         public function getRelevantUser() {
 316                 if ( isset( $this->mRelevantUser ) ) {
 317                         return $this->mRelevantUser;
 318                 }
 319                 $title = $this->getRelevantTitle();
 320                 if ( $title->hasSubjectNamespace( NS_USER ) ) {
 321                         $rootUser = $title->getRootText();
 322                         if ( User::isIP( $rootUser ) ) {
 323                                 $this->mRelevantUser = User::newFromName( $rootUser, false );
 324                         } else {
 325                                 $user = User::newFromName( $rootUser, false );
 326
 327                                 if ( $user ) {
 328                                         $user->load( User::READ_NORMAL );
 329
 330                                         if ( $user->isLoggedIn() ) {
 331                                                 $this->mRelevantUser = $user;
 332                                         }
 333                                 }
 334                         }
 335                         return $this->mRelevantUser;
 336                 }
 337                 return null;
 338         }
 339
 340         /**
 341          * Outputs the HTML generated by other functions.
 342          * @param OutputPage $out
 343          */
 344         abstract function outputPage( OutputPage $out = null );
 345
 346         /**
 347          * @param array $data
 348          * @return string
 349          */
 350         static function makeVariablesScript( $data ) {
 351                 if ( $data ) {
 352                         return ResourceLoader::makeInlineScript(
 353                                 ResourceLoader::makeConfigSetScript( $data )
 354                         );
 355                 } else {
 356                         return '';
 357                 }
 358         }
 359
 360         /**
 361          * Get the query to generate a dynamic stylesheet
 362          *
 363          * @return array
 364          */
 365         public static function getDynamicStylesheetQuery() {
 366                 global $wgSquidMaxage;
 367
 368                 return [
 369                                 'action' => 'raw',
 370                                 'maxage' => $wgSquidMaxage,
 371                                 'usemsgcache' => 'yes',
 372                                 'ctype' => 'text/css',
 373                                 'smaxage' => $wgSquidMaxage,
 374                         ];
 375         }
 376
 377         /**
 378          * Add skin specific stylesheets
 379          * Calling this method with an $out of anything but the same OutputPage
 380          * inside ->getOutput() is deprecated. The $out arg is kept
 381          * for compatibility purposes with skins.
 382          * @param OutputPage $out
 383          * @todo delete
 384          */
 385         abstract function setupSkinUserCss( OutputPage $out );
 386
 387         /**
 388          * TODO: document
 389          * @param Title $title
 390          * @return string
 391          */
 392         function getPageClasses( $title ) {
 393                 $numeric = 'ns-' . $title->getNamespace();
 394
 395                 if ( $title->isSpecialPage() ) {
 396                         $type = 'ns-special';
 397                         // T25315: provide a class based on the canonical special page name without subpages
 398                         list( $canonicalName ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );
 399                         if ( $canonicalName ) {
 400                                 $type .= ' ' . Sanitizer::escapeClass( "mw-special-$canonicalName" );
 401                         } else {
 402                                 $type .= ' mw-invalidspecialpage';
 403                         }
 404                 } elseif ( $title->isTalkPage() ) {
 405                         $type = 'ns-talk';
 406                 } else {
 407                         $type = 'ns-subject';
 408                 }
 409
 410                 $name = Sanitizer::escapeClass( 'page-' . $title->getPrefixedText() );
 411                 $root = Sanitizer::escapeClass( 'rootpage-' . $title->getRootTitle()->getPrefixedText() );
 412
 413                 return "$numeric $type $name $root";
 414         }
 415
 416         /**
 417          * Return values for <html> element
 418          * @return array Array of associative name-to-value elements for <html> element
 419          */
 420         public function getHtmlElementAttributes() {
 421                 $lang = $this->getLanguage();
 422                 return [
 423                         'lang' => $lang->getHtmlCode(),
 424                         'dir' => $lang->getDir(),
 425                         'class' => 'client-nojs',
 426                 ];
 427         }
 428
 429         /**
 430          * This will be called by OutputPage::headElement when it is creating the
 431          * "<body>" tag, skins can override it if they have a need to add in any
 432          * body attributes or classes of their own.
 433          * @param OutputPage $out
 434          * @param array $bodyAttrs
 435          */
 436         function addToBodyAttributes( $out, &$bodyAttrs ) {
 437                 // does nothing by default
 438         }
 439
 440         /**
 441          * URL to the logo
 442          * @return string
 443          */
 444         function getLogo() {
 445                 global $wgLogo;
 446                 return $wgLogo;
 447         }
 448
 449         /**
 450          * @return string HTML
 451          */
 452         function getCategoryLinks() {
 453                 global $wgUseCategoryBrowser;
 454
 455                 $out = $this->getOutput();
 456                 $allCats = $out->getCategoryLinks();
 457
 458                 if ( !count( $allCats ) ) {
 459                         return '';
 460                 }
 461
 462                 $embed = "<li>";
 463                 $pop = "</li>";
 464
 465                 $s = '';
 466                 $colon = $this->msg( 'colon-separator' )->escaped();
 467
 468                 if ( !empty( $allCats['normal'] ) ) {
 469                         $t = $embed . implode( "{$pop}{$embed}", $allCats['normal'] ) . $pop;
 470
 471                         $msg = $this->msg( 'pagecategories' )->numParams( count( $allCats['normal'] ) )->escaped();
 472                         $linkPage = wfMessage( 'pagecategorieslink' )->inContentLanguage()->text();
 473                         $title = Title::newFromText( $linkPage );
 474                         $link = $title ? Linker::link( $title, $msg ) : $msg;
 475                         $s .= '<div id="mw-normal-catlinks" class="mw-normal-catlinks">' .
 476                                 $link . $colon . '<ul>' . $t . '</ul>' . '</div>';
 477                 }
 478
 479                 # Hidden categories
 480                 if ( isset( $allCats['hidden'] ) ) {
 481                         if ( $this->getUser()->getBoolOption( 'showhiddencats' ) ) {
 482                                 $class = ' mw-hidden-cats-user-shown';
 483                         } elseif ( $this->getTitle()->getNamespace() == NS_CATEGORY ) {
 484                                 $class = ' mw-hidden-cats-ns-shown';
 485                         } else {
 486                                 $class = ' mw-hidden-cats-hidden';
 487                         }
 488
 489                         $s .= "<div id=\"mw-hidden-catlinks\" class=\"mw-hidden-catlinks$class\">" .
 490                                 $this->msg( 'hidden-categories' )->numParams( count( $allCats['hidden'] ) )->escaped() .
 491                                 $colon . '<ul>' . $embed . implode( "{$pop}{$embed}", $allCats['hidden'] ) . $pop . '</ul>' .
 492                                 '</div>';
 493                 }
 494
 495                 # optional 'dmoz-like' category browser. Will be shown under the list
 496                 # of categories an article belong to
 497                 if ( $wgUseCategoryBrowser ) {
 498                         $s .= '<br /><hr />';
 499
 500                         # get a big array of the parents tree
 501                         $parenttree = $this->getTitle()->getParentCategoryTree();
 502                         # Skin object passed by reference cause it can not be
 503                         # accessed under the method subfunction drawCategoryBrowser
 504                         $tempout = explode( "\n", $this->drawCategoryBrowser( $parenttree ) );
 505                         # Clean out bogus first entry and sort them
 506                         unset( $tempout[0] );
 507                         asort( $tempout );
 508                         # Output one per line
 509                         $s .= implode( "<br />\n", $tempout );
 510                 }
 511
 512                 return $s;
 513         }
 514
 515         /**
 516          * Render the array as a series of links.
 517          * @param array $tree Categories tree returned by Title::getParentCategoryTree
 518          * @return string Separated by &gt;, terminate with "\n"
 519          */
 520         function drawCategoryBrowser( $tree ) {
 521                 $return = '';
 522
 523                 foreach ( $tree as $element => $parent ) {
 524                         if ( empty( $parent ) ) {
 525                                 # element start a new list
 526                                 $return .= "\n";
 527                         } else {
 528                                 # grab the others elements
 529                                 $return .= $this->drawCategoryBrowser( $parent ) . ' &gt; ';
 530                         }
 531
 532                         # add our current element to the list
 533                         $eltitle = Title::newFromText( $element );
 534                         $return .= Linker::link( $eltitle, htmlspecialchars( $eltitle->getText() ) );
 535                 }
 536
 537                 return $return;
 538         }
 539
 540         /**
 541          * @return string HTML
 542          */
 543         function getCategories() {
 544                 $out = $this->getOutput();
 545                 $catlinks = $this->getCategoryLinks();
 546
 547                 // Check what we're showing
 548                 $allCats = $out->getCategoryLinks();
 549                 $showHidden = $this->getUser()->getBoolOption( 'showhiddencats' ) ||
 550                                                 $this->getTitle()->getNamespace() == NS_CATEGORY;
 551
 552                 $classes = [ 'catlinks' ];
 553                 if ( empty( $allCats['normal'] ) && !( !empty( $allCats['hidden'] ) && $showHidden ) ) {
 554                         $classes[] = 'catlinks-allhidden';
 555                 }
 556
 557                 return Html::rawElement(
 558                         'div',
 559                         [ 'id' => 'catlinks', 'class' => $classes, 'data-mw' => 'interface' ],
 560                         $catlinks
 561                 );
 562         }
 563
 564         /**
 565          * This runs a hook to allow extensions placing their stuff after content
 566          * and article metadata (e.g. categories).
 567          * Note: This function has nothing to do with afterContent().
 568          *
 569          * This hook is placed here in order to allow using the same hook for all
 570          * skins, both the SkinTemplate based ones and the older ones, which directly
 571          * use this class to get their data.
 572          *
 573          * The output of this function gets processed in SkinTemplate::outputPage() for
 574          * the SkinTemplate based skins, all other skins should directly echo it.
 575          *
 576          * @return string Empty by default, if not changed by any hook function.
 577          */
 578         protected function afterContentHook() {
 579                 $data = '';
 580
 581                 if ( Hooks::run( 'SkinAfterContent', [ &$data, $this ] ) ) {
 582                         // adding just some spaces shouldn't toggle the output
 583                         // of the whole <div/>, so we use trim() here
 584                         if ( trim( $data ) != '' ) {
 585                                 // Doing this here instead of in the skins to
 586                                 // ensure that the div has the same ID in all
 587                                 // skins
 588                                 $data = "<div id='mw-data-after-content'>\n" .
 589                                         "\t$data\n" .
 590                                         "</div>\n";
 591                         }
 592                 } else {
 593                         wfDebug( "Hook SkinAfterContent changed output processing.\n" );
 594                 }
 595
 596                 return $data;
 597         }
 598
 599         /**
 600          * Generate debug data HTML for displaying at the bottom of the main content
 601          * area.
 602          * @return string HTML containing debug data, if enabled (otherwise empty).
 603          */
 604         protected function generateDebugHTML() {
 605                 return MWDebug::getHTMLDebugLog();
 606         }
 607
 608         /**
 609          * This gets called shortly before the "</body>" tag.
 610          *
 611          * @return string HTML-wrapped JS code to be put before "</body>"
 612          */
 613         function bottomScripts() {
 614                 // TODO and the suckage continues. This function is really just a wrapper around
 615                 // OutputPage::getBottomScripts() which takes a Skin param. This should be cleaned
 616                 // up at some point
 617                 $bottomScriptText = $this->getOutput()->getBottomScripts();
 618                 Hooks::run( 'SkinAfterBottomScripts', [ $this, &$bottomScriptText ] );
 619
 620                 return $bottomScriptText;
 621         }
 622
 623         /**
 624          * Text with the permalink to the source page,
 625          * usually shown on the footer of a printed page
 626          *
 627          * @return string HTML text with an URL
 628          */
 629         function printSource() {
 630                 $oldid = $this->getRevisionId();
 631                 if ( $oldid ) {
 632                         $canonicalUrl = $this->getTitle()->getCanonicalURL( 'oldid=' . $oldid );
 633                         $url = htmlspecialchars( wfExpandIRI( $canonicalUrl ) );
 634                 } else {
 635                         // oldid not available for non existing pages
 636                         $url = htmlspecialchars( wfExpandIRI( $this->getTitle()->getCanonicalURL() ) );
 637                 }
 638
 639                 return $this->msg( 'retrievedfrom' )
 640                         ->rawParams( '<a dir="ltr" href="' . $url . '">' . $url . '</a>' )
 641                         ->parse();
 642         }
 643
 644         /**
 645          * @return string HTML
 646          */
 647         function getUndeleteLink() {
 648                 $action = $this->getRequest()->getVal( 'action', 'view' );
 649
 650                 if ( $this->getTitle()->userCan( 'deletedhistory', $this->getUser() ) &&
 651                         ( !$this->getTitle()->exists() || $action == 'history' ) ) {
 652                         $n = $this->getTitle()->isDeleted();
 653
 654                         if ( $n ) {
 655                                 if ( $this->getTitle()->quickUserCan( 'undelete', $this->getUser() ) ) {
 656                                         $msg = 'thisisdeleted';
 657                                 } else {
 658                                         $msg = 'viewdeleted';
 659                                 }
 660
 661                                 return $this->msg( $msg )->rawParams(
 662                                         Linker::linkKnown(
 663                                                 SpecialPage::getTitleFor( 'Undelete', $this->getTitle()->getPrefixedDBkey() ),
 664                                                 $this->msg( 'restorelink' )->numParams( $n )->escaped() )
 665                                         )->escaped();
 666                         }
 667                 }
 668
 669                 return '';
 670         }
 671
 672         /**
 673          * @param OutputPage $out Defaults to $this->getOutput() if left as null
 674          * @return string
 675          */
 676         function subPageSubtitle( $out = null ) {
 677                 if ( $out === null ) {
 678                         $out = $this->getOutput();
 679                 }
 680                 $title = $out->getTitle();
 681                 $subpages = '';
 682
 683                 if ( !Hooks::run( 'SkinSubPageSubtitle', [ &$subpages, $this, $out ] ) ) {
 684                         return $subpages;
 685                 }
 686
 687                 if ( $out->isArticle() && MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 688                         $ptext = $title->getPrefixedText();
 689                         if ( strpos( $ptext, '/' ) !== false ) {
 690                                 $links = explode( '/', $ptext );
 691                                 array_pop( $links );
 692                                 $c = 0;
 693                                 $growinglink = '';
 694                                 $display = '';
 695                                 $lang = $this->getLanguage();
 696
 697                                 foreach ( $links as $link ) {
 698                                         $growinglink .= $link;
 699                                         $display .= $link;
 700                                         $linkObj = Title::newFromText( $growinglink );
 701
 702                                         if ( is_object( $linkObj ) && $linkObj->isKnown() ) {
 703                                                 $getlink = Linker::linkKnown(
 704                                                         $linkObj,
 705                                                         htmlspecialchars( $display )
 706                                                 );
 707
 708                                                 $c++;
 709
 710                                                 if ( $c > 1 ) {
 711                                                         $subpages .= $lang->getDirMarkEntity() . $this->msg( 'pipe-separator' )->escaped();
 712                                                 } else {
 713                                                         $subpages .= '&lt; ';
 714                                                 }
 715
 716                                                 $subpages .= $getlink;
 717                                                 $display = '';
 718                                         } else {
 719                                                 $display .= '/';
 720                                         }
 721                                         $growinglink .= '/';
 722                                 }
 723                         }
 724                 }
 725
 726                 return $subpages;
 727         }
 728
 729         /**
 730          * @deprecated since 1.27, feature removed
 731          * @return bool Always false
 732          */
 733         function showIPinHeader() {
 734                 wfDeprecated( __METHOD__, '1.27' );
 735                 return false;
 736         }
 737
 738         /**
 739          * @return string
 740          */
 741         function getSearchLink() {
 742                 $searchPage = SpecialPage::getTitleFor( 'Search' );
 743                 return $searchPage->getLocalURL();
 744         }
 745
 746         /**
 747          * @return string
 748          */
 749         function escapeSearchLink() {
 750                 return htmlspecialchars( $this->getSearchLink() );
 751         }
 752
 753         /**
 754          * @param string $type
 755          * @return string
 756          */
 757         function getCopyright( $type = 'detect' ) {
 758                 global $wgRightsPage, $wgRightsUrl, $wgRightsText;
 759
 760                 if ( $type == 'detect' ) {
 761                         if ( !$this->isRevisionCurrent()
 762                                 && !$this->msg( 'history_copyright' )->inContentLanguage()->isDisabled()
 763                         ) {
 764                                 $type = 'history';
 765                         } else {
 766                                 $type = 'normal';
 767                         }
 768                 }
 769
 770                 if ( $type == 'history' ) {
 771                         $msg = 'history_copyright';
 772                 } else {
 773                         $msg = 'copyright';
 774                 }
 775
 776                 if ( $wgRightsPage ) {
 777                         $title = Title::newFromText( $wgRightsPage );
 778                         $link = Linker::linkKnown( $title, $wgRightsText );
 779                 } elseif ( $wgRightsUrl ) {
 780                         $link = Linker::makeExternalLink( $wgRightsUrl, $wgRightsText );
 781                 } elseif ( $wgRightsText ) {
 782                         $link = $wgRightsText;
 783                 } else {
 784                         # Give up now
 785                         return '';
 786                 }
 787
 788                 // Allow for site and per-namespace customization of copyright notice.
 789                 // @todo Remove deprecated $forContent param from hook handlers and then remove here.
 790                 $forContent = true;
 791
 792                 Hooks::run(
 793                         'SkinCopyrightFooter',
 794                         [ $this->getTitle(), $type, &$msg, &$link, &$forContent ]
 795                 );
 796
 797                 return $this->msg( $msg )->rawParams( $link )->text();
 798         }
 799
 800         /**
 801          * @return null|string
 802          */
 803         function getCopyrightIcon() {
 804                 global $wgRightsUrl, $wgRightsText, $wgRightsIcon, $wgFooterIcons;
 805
 806                 $out = '';
 807
 808                 if ( $wgFooterIcons['copyright']['copyright'] ) {
 809                         $out = $wgFooterIcons['copyright']['copyright'];
 810                 } elseif ( $wgRightsIcon ) {
 811                         $icon = htmlspecialchars( $wgRightsIcon );
 812
 813                         if ( $wgRightsUrl ) {
 814                                 $url = htmlspecialchars( $wgRightsUrl );
 815                                 $out .= '<a href="' . $url . '">';
 816                         }
 817
 818                         $text = htmlspecialchars( $wgRightsText );
 819                         $out .= "<img src=\"$icon\" alt=\"$text\" width=\"88\" height=\"31\" />";
 820
 821                         if ( $wgRightsUrl ) {
 822                                 $out .= '</a>';
 823                         }
 824                 }
 825
 826                 return $out;
 827         }
 828
 829         /**
 830          * Gets the powered by MediaWiki icon.
 831          * @return string
 832          */
 833         function getPoweredBy() {
 834                 global $wgResourceBasePath;
 835
 836                 $url1 = htmlspecialchars(
 837                         "$wgResourceBasePath/resources/assets/poweredby_mediawiki_88x31.png"
 838                 );
 839                 $url1_5 = htmlspecialchars(
 840                         "$wgResourceBasePath/resources/assets/poweredby_mediawiki_132x47.png"
 841                 );
 842                 $url2 = htmlspecialchars(
 843                         "$wgResourceBasePath/resources/assets/poweredby_mediawiki_176x62.png"
 844                 );
 845                 $text = '<a href="//www.mediawiki.org/"><img src="' . $url1
 846                         . '" srcset="' . $url1_5 . ' 1.5x, ' . $url2 . ' 2x" '
 847                         . 'height="31" width="88" alt="Powered by MediaWiki" /></a>';
 848                 Hooks::run( 'SkinGetPoweredBy', [ &$text, $this ] );
 849                 return $text;
 850         }
 851
 852         /**
 853          * Get the timestamp of the latest revision, formatted in user language
 854          *
 855          * @return string
 856          */
 857         protected function lastModified() {
 858                 $timestamp = $this->getOutput()->getRevisionTimestamp();
 859
 860                 # No cached timestamp, load it from the database
 861                 if ( $timestamp === null ) {
 862                         $timestamp = Revision::getTimestampFromId( $this->getTitle(), $this->getRevisionId() );
 863                 }
 864
 865                 if ( $timestamp ) {
 866                         $d = $this->getLanguage()->userDate( $timestamp, $this->getUser() );
 867                         $t = $this->getLanguage()->userTime( $timestamp, $this->getUser() );
 868                         $s = ' ' . $this->msg( 'lastmodifiedat', $d, $t )->parse();
 869                 } else {
 870                         $s = '';
 871                 }
 872
 873                 if ( wfGetLB()->getLaggedReplicaMode() ) {
 874                         $s .= ' <strong>' . $this->msg( 'laggedslavemode' )->parse() . '</strong>';
 875                 }
 876
 877                 return $s;
 878         }
 879
 880         /**
 881          * @param string $align
 882          * @return string
 883          */
 884         function logoText( $align = '' ) {
 885                 if ( $align != '' ) {
 886                         $a = " style='float: {$align};'";
 887                 } else {
 888                         $a = '';
 889                 }
 890
 891                 $mp = $this->msg( 'mainpage' )->escaped();
 892                 $mptitle = Title::newMainPage();
 893                 $url = ( is_object( $mptitle ) ? htmlspecialchars( $mptitle->getLocalURL() ) : '' );
 894
 895                 $logourl = $this->getLogo();
 896                 $s = "<a href='{$url}'><img{$a} src='{$logourl}' alt='[{$mp}]' /></a>";
 897
 898                 return $s;
 899         }
 900
 901         /**
 902          * Renders a $wgFooterIcons icon according to the method's arguments
 903          * @param array $icon The icon to build the html for, see $wgFooterIcons
 904          *   for the format of this array.
 905          * @param bool|string $withImage Whether to use the icon's image or output
 906          *   a text-only footericon.
 907          * @return string HTML
 908          */
 909         function makeFooterIcon( $icon, $withImage = 'withImage' ) {
 910                 if ( is_string( $icon ) ) {
 911                         $html = $icon;
 912                 } else { // Assuming array
 913                         $url = isset( $icon["url"] ) ? $icon["url"] : null;
 914                         unset( $icon["url"] );
 915                         if ( isset( $icon["src"] ) && $withImage === 'withImage' ) {
 916                                 // do this the lazy way, just pass icon data as an attribute array
 917                                 $html = Html::element( 'img', $icon );
 918                         } else {
 919                                 $html = htmlspecialchars( $icon["alt"] );
 920                         }
 921                         if ( $url ) {
 922                                 global $wgExternalLinkTarget;
 923                                 $html = Html::rawElement( 'a',
 924                                         [ "href" => $url, "target" => $wgExternalLinkTarget ],
 925                                         $html );
 926                         }
 927                 }
 928                 return $html;
 929         }
 930
 931         /**
 932          * Gets the link to the wiki's main page.
 933          * @return string
 934          */
 935         function mainPageLink() {
 936                 $s = Linker::linkKnown(
 937                         Title::newMainPage(),
 938                         $this->msg( 'mainpage' )->escaped()
 939                 );
 940
 941                 return $s;
 942         }
 943
 944         /**
 945          * Returns an HTML link for use in the footer
 946          * @param string $desc The i18n message key for the link text
 947          * @param string $page The i18n message key for the page to link to
 948          * @return string HTML anchor
 949          */
 950         public function footerLink( $desc, $page ) {
 951                 $title = $this->footerLinkTitle( $desc, $page );
 952                 if ( !$title ) {
 953                         return '';
 954                 }
 955
 956                 return Linker::linkKnown(
 957                         $title,
 958                         $this->msg( $desc )->escaped()
 959                 );
 960         }
 961
 962         /**
 963          * @param string $desc
 964          * @param string $page
 965          * @return Title|null
 966          */
 967         private function footerLinkTitle( $desc, $page ) {
 968                 // If the link description has been set to "-" in the default language,
 969                 if ( $this->msg( $desc )->inContentLanguage()->isDisabled() ) {
 970                         // then it is disabled, for all languages.
 971                         return null;
 972                 }
 973                 // Otherwise, we display the link for the user, described in their
 974                 // language (which may or may not be the same as the default language),
 975                 // but we make the link target be the one site-wide page.
 976                 $title = Title::newFromText( $this->msg( $page )->inContentLanguage()->text() );
 977
 978                 return $title ?: null;
 979         }
 980
 981         /**
 982          * Gets the link to the wiki's privacy policy page.
 983          * @return string HTML
 984          */
 985         function privacyLink() {
 986                 return $this->footerLink( 'privacy', 'privacypage' );
 987         }
 988
 989         /**
 990          * Gets the link to the wiki's about page.
 991          * @return string HTML
 992          */
 993         function aboutLink() {
 994                 return $this->footerLink( 'aboutsite', 'aboutpage' );
 995         }
 996
 997         /**
 998          * Gets the link to the wiki's general disclaimers page.
 999          * @return string HTML
1000          */
1001         function disclaimerLink() {
1002                 return $this->footerLink( 'disclaimers', 'disclaimerpage' );
1003         }
1004
1005         /**
1006          * Return URL options for the 'edit page' link.
1007          * This may include an 'oldid' specifier, if the current page view is such.
1008          *
1009          * @return array
1010          * @private
1011          */
1012         function editUrlOptions() {
1013                 $options = [ 'action' => 'edit' ];
1014
1015                 if ( !$this->isRevisionCurrent() ) {
1016                         $options['oldid'] = intval( $this->getRevisionId() );
1017                 }
1018
1019                 return $options;
1020         }
1021
1022         /**
1023          * @param User|int $id
1024          * @return bool
1025          */
1026         function showEmailUser( $id ) {
1027                 if ( $id instanceof User ) {
1028                         $targetUser = $id;
1029                 } else {
1030                         $targetUser = User::newFromId( $id );
1031                 }
1032
1033                 # The sending user must have a confirmed email address and the target
1034                 # user must have a confirmed email address and allow emails from users.
1035                 return $this->getUser()->canSendEmail() &&
1036                         $targetUser->canReceiveEmail();
1037         }
1038
1039         /**
1040          * Return a fully resolved style path url to images or styles stored in the current skins's folder.
1041          * This method returns a url resolved using the configured skin style path
1042          * and includes the style version inside of the url.
1043          *
1044          * Requires $stylename to be set, otherwise throws MWException.
1045          *
1046          * @param string $name The name or path of a skin resource file
1047          * @return string The fully resolved style path url including styleversion
1048          * @throws MWException
1049          */
1050         function getSkinStylePath( $name ) {
1051                 global $wgStylePath, $wgStyleVersion;
1052
1053                 if ( $this->stylename === null ) {
1054                         $class = static::class;
1055                         throw new MWException( "$class::\$stylename must be set to use getSkinStylePath()" );
1056                 }
1057
1058                 return "$wgStylePath/{$this->stylename}/$name?$wgStyleVersion";
1059         }
1060
1061         /* these are used extensively in SkinTemplate, but also some other places */
1062
1063         /**
1064          * @param string $urlaction
1065          * @return string
1066          */
1067         static function makeMainPageUrl( $urlaction = '' ) {
1068                 $title = Title::newMainPage();
1069                 self::checkTitle( $title, '' );
1070
1071                 return $title->getLocalURL( $urlaction );
1072         }
1073
1074         /**
1075          * Make a URL for a Special Page using the given query and protocol.
1076          *
1077          * If $proto is set to null, make a local URL. Otherwise, make a full
1078          * URL with the protocol specified.
1079          *
1080          * @param string $name Name of the Special page
1081          * @param string $urlaction Query to append
1082          * @param string|null $proto Protocol to use or null for a local URL
1083          * @return string
1084          */
1085         static function makeSpecialUrl( $name, $urlaction = '', $proto = null ) {
1086                 $title = SpecialPage::getSafeTitleFor( $name );
1087                 if ( is_null( $proto ) ) {
1088                         return $title->getLocalURL( $urlaction );
1089                 } else {
1090                         return $title->getFullURL( $urlaction, false, $proto );
1091                 }
1092         }
1093
1094         /**
1095          * @param string $name
1096          * @param string $subpage
1097          * @param string $urlaction
1098          * @return string
1099          */
1100         static function makeSpecialUrlSubpage( $name, $subpage, $urlaction = '' ) {
1101                 $title = SpecialPage::getSafeTitleFor( $name, $subpage );
1102                 return $title->getLocalURL( $urlaction );
1103         }
1104
1105         /**
1106          * @param string $name
1107          * @param string $urlaction
1108          * @return string
1109          */
1110         static function makeI18nUrl( $name, $urlaction = '' ) {
1111                 $title = Title::newFromText( wfMessage( $name )->inContentLanguage()->text() );
1112                 self::checkTitle( $title, $name );
1113                 return $title->getLocalURL( $urlaction );
1114         }
1115
1116         /**
1117          * @param string $name
1118          * @param string $urlaction
1119          * @return string
1120          */
1121         static function makeUrl( $name, $urlaction = '' ) {
1122                 $title = Title::newFromText( $name );
1123                 self::checkTitle( $title, $name );
1124
1125                 return $title->getLocalURL( $urlaction );
1126         }
1127
1128         /**
1129          * If url string starts with http, consider as external URL, else
1130          * internal
1131          * @param string $name
1132          * @return string URL
1133          */
1134         static function makeInternalOrExternalUrl( $name ) {
1135                 if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $name ) ) {
1136                         return $name;
1137                 } else {
1138                         return self::makeUrl( $name );
1139                 }
1140         }
1141
1142         /**
1143          * this can be passed the NS number as defined in Language.php
1144          * @param string $name
1145          * @param string $urlaction
1146          * @param int $namespace
1147          * @return string
1148          */
1149         static function makeNSUrl( $name, $urlaction = '', $namespace = NS_MAIN ) {
1150                 $title = Title::makeTitleSafe( $namespace, $name );
1151                 self::checkTitle( $title, $name );
1152
1153                 return $title->getLocalURL( $urlaction );
1154         }
1155
1156         /**
1157          * these return an array with the 'href' and boolean 'exists'
1158          * @param string $name
1159          * @param string $urlaction
1160          * @return array
1161          */
1162         static function makeUrlDetails( $name, $urlaction = '' ) {
1163                 $title = Title::newFromText( $name );
1164                 self::checkTitle( $title, $name );
1165
1166                 return [
1167                         'href' => $title->getLocalURL( $urlaction ),
1168                         'exists' => $title->isKnown(),
1169                 ];
1170         }
1171
1172         /**
1173          * Make URL details where the article exists (or at least it's convenient to think so)
1174          * @param string $name Article name
1175          * @param string $urlaction
1176          * @return array
1177          */
1178         static function makeKnownUrlDetails( $name, $urlaction = '' ) {
1179                 $title = Title::newFromText( $name );
1180                 self::checkTitle( $title, $name );
1181
1182                 return [
1183                         'href' => $title->getLocalURL( $urlaction ),
1184                         'exists' => true
1185                 ];
1186         }
1187
1188         /**
1189          * make sure we have some title to operate on
1190          *
1191          * @param Title $title
1192          * @param string $name
1193          */
1194         static function checkTitle( &$title, $name ) {
1195                 if ( !is_object( $title ) ) {
1196                         $title = Title::newFromText( $name );
1197                         if ( !is_object( $title ) ) {
1198                                 $title = Title::newFromText( '--error: link target missing--' );
1199                         }
1200                 }
1201         }
1202
1203         /**
1204          * Build an array that represents the sidebar(s), the navigation bar among them.
1205          *
1206          * BaseTemplate::getSidebar can be used to simplify the format and id generation in new skins.
1207          *
1208          * The format of the returned array is [ heading => content, ... ], where:
1209          * - heading is the heading of a navigation portlet. It is either:
1210          *   - magic string to be handled by the skins ('SEARCH' / 'LANGUAGES' / 'TOOLBOX' / ...)
1211          *   - a message name (e.g. 'navigation'), the message should be HTML-escaped by the skin
1212          *   - plain text, which should be HTML-escaped by the skin
1213          * - content is the contents of the portlet. It is either:
1214          *   - HTML text (<ul><li>...</li>...</ul>)
1215          *   - array of link data in a format accepted by BaseTemplate::makeListItem()
1216          *   - (for a magic string as a key, any value)
1217          *
1218          * Note that extensions can control the sidebar contents using the SkinBuildSidebar hook
1219          * and can technically insert anything in here; skin creators are expected to handle
1220          * values described above.
1221          *
1222          * @return array
1223          */
1224         function buildSidebar() {
1225                 global $wgEnableSidebarCache, $wgSidebarCacheExpiry;
1226
1227                 $that = $this;
1228                 $callback = function () use ( $that ) {
1229                         $bar = [];
1230                         $that->addToSidebar( $bar, 'sidebar' );
1231                         Hooks::run( 'SkinBuildSidebar', [ $that, &$bar ] );
1232
1233                         return $bar;
1234                 };
1235
1236                 if ( $wgEnableSidebarCache ) {
1237                         $cache = ObjectCache::getMainWANInstance();
1238                         $sidebar = $cache->getWithSetCallback(
1239                                 $cache->makeKey( 'sidebar', $this->getLanguage()->getCode() ),
1240                                 MessageCache::singleton()->isDisabled()
1241                                         ? $cache::TTL_UNCACHEABLE // bug T133069
1242                                         : $wgSidebarCacheExpiry,
1243                                 $callback,
1244                                 [ 'lockTSE' => 30 ]
1245                         );
1246                 } else {
1247                         $sidebar = $callback();
1248                 }
1249
1250                 // Apply post-processing to the cached value
1251                 Hooks::run( 'SidebarBeforeOutput', [ $this, &$sidebar ] );
1252
1253                 return $sidebar;
1254         }
1255
1256         /**
1257          * Add content from a sidebar system message
1258          * Currently only used for MediaWiki:Sidebar (but may be used by Extensions)
1259          *
1260          * This is just a wrapper around addToSidebarPlain() for backwards compatibility
1261          *
1262          * @param array $bar
1263          * @param string $message
1264          */
1265         public function addToSidebar( &$bar, $message ) {
1266                 $this->addToSidebarPlain( $bar, wfMessage( $message )->inContentLanguage()->plain() );
1267         }
1268
1269         /**
1270          * Add content from plain text
1271          * @since 1.17
1272          * @param array $bar
1273          * @param string $text
1274          * @return array
1275          */
1276         function addToSidebarPlain( &$bar, $text ) {
1277                 $lines = explode( "\n", $text );
1278
1279                 $heading = '';
1280                 $messageTitle = $this->getConfig()->get( 'EnableSidebarCache' )
1281                         ? Title::newMainPage() : $this->getTitle();
1282
1283                 foreach ( $lines as $line ) {
1284                         if ( strpos( $line, '*' ) !== 0 ) {
1285                                 continue;
1286                         }
1287                         $line = rtrim( $line, "\r" ); // for Windows compat
1288
1289                         if ( strpos( $line, '**' ) !== 0 ) {
1290                                 $heading = trim( $line, '* ' );
1291                                 if ( !array_key_exists( $heading, $bar ) ) {
1292                                         $bar[$heading] = [];
1293                                 }
1294                         } else {
1295                                 $line = trim( $line, '* ' );
1296
1297                                 if ( strpos( $line, '|' ) !== false ) { // sanity check
1298                                         $line = MessageCache::singleton()->transform( $line, false, null, $messageTitle );
1299                                         $line = array_map( 'trim', explode( '|', $line, 2 ) );
1300                                         if ( count( $line ) !== 2 ) {
1301                                                 // Second sanity check, could be hit by people doing
1302                                                 // funky stuff with parserfuncs... (T35321)
1303                                                 continue;
1304                                         }
1305
1306                                         $extraAttribs = [];
1307
1308                                         $msgLink = $this->msg( $line[0] )->title( $messageTitle )->inContentLanguage();
1309                                         if ( $msgLink->exists() ) {
1310                                                 $link = $msgLink->text();
1311                                                 if ( $link == '-' ) {
1312                                                         continue;
1313                                                 }
1314                                         } else {
1315                                                 $link = $line[0];
1316                                         }
1317                                         $msgText = $this->msg( $line[1] )->title( $messageTitle );
1318                                         if ( $msgText->exists() ) {
1319                                                 $text = $msgText->text();
1320                                         } else {
1321                                                 $text = $line[1];
1322                                         }
1323
1324                                         if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $link ) ) {
1325                                                 $href = $link;
1326
1327                                                 // Parser::getExternalLinkAttribs won't work here because of the Namespace things
1328                                                 global $wgNoFollowLinks, $wgNoFollowDomainExceptions;
1329                                                 if ( $wgNoFollowLinks && !wfMatchesDomainList( $href, $wgNoFollowDomainExceptions ) ) {
1330                                                         $extraAttribs['rel'] = 'nofollow';
1331                                                 }
1332
1333                                                 global $wgExternalLinkTarget;
1334                                                 if ( $wgExternalLinkTarget ) {
1335                                                         $extraAttribs['target'] = $wgExternalLinkTarget;
1336                                                 }
1337                                         } else {
1338                                                 $title = Title::newFromText( $link );
1339
1340                                                 if ( $title ) {
1341                                                         $title = $title->fixSpecialName();
1342                                                         $href = $title->getLinkURL();
1343                                                 } else {
1344                                                         $href = 'INVALID-TITLE';
1345                                                 }
1346                                         }
1347
1348                                         $bar[$heading][] = array_merge( [
1349                                                 'text' => $text,
1350                                                 'href' => $href,
1351                                                 'id' => 'n-' . Sanitizer::escapeId( strtr( $line[1], ' ', '-' ), 'noninitial' ),
1352                                                 'active' => false
1353                                         ], $extraAttribs );
1354                                 } else {
1355                                         continue;
1356                                 }
1357                         }
1358                 }
1359
1360                 return $bar;
1361         }
1362
1363         /**
1364          * Gets new talk page messages for the current user and returns an
1365          * appropriate alert message (or an empty string if there are no messages)
1366          * @return string
1367          */
1368         function getNewtalks() {
1369
1370                 $newMessagesAlert = '';
1371                 $user = $this->getUser();
1372                 $newtalks = $user->getNewMessageLinks();
1373                 $out = $this->getOutput();
1374
1375                 // Allow extensions to disable or modify the new messages alert
1376                 if ( !Hooks::run( 'GetNewMessagesAlert', [ &$newMessagesAlert, $newtalks, $user, $out ] ) ) {
1377                         return '';
1378                 }
1379                 if ( $newMessagesAlert ) {
1380                         return $newMessagesAlert;
1381                 }
1382
1383                 if ( count( $newtalks ) == 1 && $newtalks[0]['wiki'] === wfWikiID() ) {
1384                         $uTalkTitle = $user->getTalkPage();
1385                         $lastSeenRev = isset( $newtalks[0]['rev'] ) ? $newtalks[0]['rev'] : null;
1386                         $nofAuthors = 0;
1387                         if ( $lastSeenRev !== null ) {
1388                                 $plural = true; // Default if we have a last seen revision: if unknown, use plural
1389                                 $latestRev = Revision::newFromTitle( $uTalkTitle, false, Revision::READ_NORMAL );
1390                                 if ( $latestRev !== null ) {
1391                                         // Singular if only 1 unseen revision, plural if several unseen revisions.
1392                                         $plural = $latestRev->getParentId() !== $lastSeenRev->getId();
1393                                         $nofAuthors = $uTalkTitle->countAuthorsBetween(
1394                                                 $lastSeenRev, $latestRev, 10, 'include_new' );
1395                                 }
1396                         } else {
1397                                 // Singular if no revision -> diff link will show latest change only in any case
1398                                 $plural = false;
1399                         }
1400                         $plural = $plural ? 999 : 1;
1401                         // 999 signifies "more than one revision". We don't know how many, and even if we did,
1402                         // the number of revisions or authors is not necessarily the same as the number of
1403                         // "messages".
1404                         $newMessagesLink = Linker::linkKnown(
1405                                 $uTalkTitle,
1406                                 $this->msg( 'newmessageslinkplural' )->params( $plural )->escaped(),
1407                                 [],
1408                                 [ 'redirect' => 'no' ]
1409                         );
1410
1411                         $newMessagesDiffLink = Linker::linkKnown(
1412                                 $uTalkTitle,
1413                                 $this->msg( 'newmessagesdifflinkplural' )->params( $plural )->escaped(),
1414                                 [],
1415                                 $lastSeenRev !== null
1416                                         ? [ 'oldid' => $lastSeenRev->getId(), 'diff' => 'cur' ]
1417                                         : [ 'diff' => 'cur' ]
1418                         );
1419
1420                         if ( $nofAuthors >= 1 && $nofAuthors <= 10 ) {
1421                                 $newMessagesAlert = $this->msg(
1422                                         'youhavenewmessagesfromusers',
1423                                         $newMessagesLink,
1424                                         $newMessagesDiffLink
1425                                 )->numParams( $nofAuthors, $plural );
1426                         } else {
1427                                 // $nofAuthors === 11 signifies "11 or more" ("more than 10")
1428                                 $newMessagesAlert = $this->msg(
1429                                         $nofAuthors > 10 ? 'youhavenewmessagesmanyusers' : 'youhavenewmessages',
1430                                         $newMessagesLink,
1431                                         $newMessagesDiffLink
1432                                 )->numParams( $plural );
1433                         }
1434                         $newMessagesAlert = $newMessagesAlert->text();
1435                         # Disable CDN cache
1436                         $out->setCdnMaxage( 0 );
1437                 } elseif ( count( $newtalks ) ) {
1438                         $sep = $this->msg( 'newtalkseparator' )->escaped();
1439                         $msgs = [];
1440
1441                         foreach ( $newtalks as $newtalk ) {
1442                                 $msgs[] = Xml::element(
1443                                         'a',
1444                                         [ 'href' => $newtalk['link'] ], $newtalk['wiki']
1445                                 );
1446                         }
1447                         $parts = implode( $sep, $msgs );
1448                         $newMessagesAlert = $this->msg( 'youhavenewmessagesmulti' )->rawParams( $parts )->escaped();
1449                         $out->setCdnMaxage( 0 );
1450                 }
1451
1452                 return $newMessagesAlert;
1453         }
1454
1455         /**
1456          * Get a cached notice
1457          *
1458          * @param string $name Message name, or 'default' for $wgSiteNotice
1459          * @return string|bool HTML fragment, or false to indicate that the caller
1460          *   should fall back to the next notice in its sequence
1461          */
1462         private function getCachedNotice( $name ) {
1463                 global $wgRenderHashAppend, $parserMemc, $wgContLang;
1464
1465                 $needParse = false;
1466
1467                 if ( $name === 'default' ) {
1468                         // special case
1469                         global $wgSiteNotice;
1470                         $notice = $wgSiteNotice;
1471                         if ( empty( $notice ) ) {
1472                                 return false;
1473                         }
1474                 } else {
1475                         $msg = $this->msg( $name )->inContentLanguage();
1476                         if ( $msg->isBlank() ) {
1477                                 return '';
1478                         } elseif ( $msg->isDisabled() ) {
1479                                 return false;
1480                         }
1481                         $notice = $msg->plain();
1482                 }
1483
1484                 // Use the extra hash appender to let eg SSL variants separately cache.
1485                 $key = wfMemcKey( $name . $wgRenderHashAppend );
1486                 $cachedNotice = $parserMemc->get( $key );
1487                 if ( is_array( $cachedNotice ) ) {
1488                         if ( md5( $notice ) == $cachedNotice['hash'] ) {
1489                                 $notice = $cachedNotice['html'];
1490                         } else {
1491                                 $needParse = true;
1492                         }
1493                 } else {
1494                         $needParse = true;
1495                 }
1496
1497                 if ( $needParse ) {
1498                         $parsed = $this->getOutput()->parse( $notice );
1499                         $parserMemc->set( $key, [ 'html' => $parsed, 'hash' => md5( $notice ) ], 600 );
1500                         $notice = $parsed;
1501                 }
1502
1503                 $notice = Html::rawElement( 'div', [ 'id' => 'localNotice',
1504                         'lang' => $wgContLang->getHtmlCode(), 'dir' => $wgContLang->getDir() ], $notice );
1505                 return $notice;
1506         }
1507
1508         /**
1509          * Get the site notice
1510          *
1511          * @return string HTML fragment
1512          */
1513         function getSiteNotice() {
1514                 $siteNotice = '';
1515
1516                 if ( Hooks::run( 'SiteNoticeBefore', [ &$siteNotice, $this ] ) ) {
1517                         if ( is_object( $this->getUser() ) && $this->getUser()->isLoggedIn() ) {
1518                                 $siteNotice = $this->getCachedNotice( 'sitenotice' );
1519                         } else {
1520                                 $anonNotice = $this->getCachedNotice( 'anonnotice' );
1521                                 if ( $anonNotice === false ) {
1522                                         $siteNotice = $this->getCachedNotice( 'sitenotice' );
1523                                 } else {
1524                                         $siteNotice = $anonNotice;
1525                                 }
1526                         }
1527                         if ( $siteNotice === false ) {
1528                                 $siteNotice = $this->getCachedNotice( 'default' );
1529                         }
1530                 }
1531
1532                 Hooks::run( 'SiteNoticeAfter', [ &$siteNotice, $this ] );
1533                 return $siteNotice;
1534         }
1535
1536         /**
1537          * Create a section edit link.  This supersedes editSectionLink() and
1538          * editSectionLinkForOther().
1539          *
1540          * @param Title $nt The title being linked to (may not be the same as
1541          *   the current page, if the section is included from a template)
1542          * @param string $section The designation of the section being pointed to,
1543          *   to be included in the link, like "&section=$section"
1544          * @param string $tooltip The tooltip to use for the link: will be escaped
1545          *   and wrapped in the 'editsectionhint' message
1546          * @param string $lang Language code
1547          * @return string HTML to use for edit link
1548          */
1549         public function doEditSectionLink( Title $nt, $section, $tooltip = null, $lang = false ) {
1550                 // HTML generated here should probably have userlangattributes
1551                 // added to it for LTR text on RTL pages
1552
1553                 $lang = wfGetLangObj( $lang );
1554
1555                 $attribs = [];
1556                 if ( !is_null( $tooltip ) ) {
1557                         # T27462: undo double-escaping.
1558                         $tooltip = Sanitizer::decodeCharReferences( $tooltip );
1559                         $attribs['title'] = wfMessage( 'editsectionhint' )->rawParams( $tooltip )
1560                                 ->inLanguage( $lang )->text();
1561                 }
1562
1563                 $links = [
1564                         'editsection' => [
1565                                 'text' => wfMessage( 'editsection' )->inLanguage( $lang )->escaped(),
1566                                 'targetTitle' => $nt,
1567                                 'attribs' => $attribs,
1568                                 'query' => [ 'action' => 'edit', 'section' => $section ],
1569                                 'options' => [ 'noclasses', 'known' ]
1570                         ]
1571                 ];
1572
1573                 Hooks::run( 'SkinEditSectionLinks', [ $this, $nt, $section, $tooltip, &$links, $lang ] );
1574
1575                 $result = '<span class="mw-editsection"><span class="mw-editsection-bracket">[</span>';
1576
1577                 $linksHtml = [];
1578                 foreach ( $links as $k => $linkDetails ) {
1579                         $linksHtml[] = Linker::link(
1580                                 $linkDetails['targetTitle'],
1581                                 $linkDetails['text'],
1582                                 $linkDetails['attribs'],
1583                                 $linkDetails['query'],
1584                                 $linkDetails['options']
1585                         );
1586                 }
1587
1588                 $result .= implode(
1589                         '<span class="mw-editsection-divider">'
1590                                 . wfMessage( 'pipe-separator' )->inLanguage( $lang )->text()
1591                                 . '</span>',
1592                         $linksHtml
1593                 );
1594
1595                 $result .= '<span class="mw-editsection-bracket">]</span></span>';
1596                 // Deprecated, use SkinEditSectionLinks hook instead
1597                 Hooks::run(
1598                         'DoEditSectionLink',
1599                         [ $this, $nt, $section, $tooltip, &$result, $lang ],
1600                         '1.25'
1601                 );
1602                 return $result;
1603         }
1604
1605 }