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 relating to search functionality
 168                         'search' => [],
 169                         // modules relating to functionality relating to watching an article
 170                         'watch' => [],
 171                         // modules which relate to the current users preferences
 172                         'user' => [],
 173                 ];
 174
 175                 // Preload jquery.tablesorter for mediawiki.page.ready
 176                 if ( strpos( $out->getHTML(), 'sortable' ) !== false ) {
 177                         $modules['content'][] = 'jquery.tablesorter';
 178                 }
 179
 180                 // Preload jquery.makeCollapsible for mediawiki.page.ready
 181                 if ( strpos( $out->getHTML(), 'mw-collapsible' ) !== false ) {
 182                         $modules['content'][] = 'jquery.makeCollapsible';
 183                 }
 184
 185                 // Add various resources if required
 186                 if ( $wgUseAjax && $wgEnableAPI ) {
 187                         if ( $wgEnableWriteAPI && $user->isLoggedIn()
 188                                 && $user->isAllowedAll( 'writeapi', 'viewmywatchlist', 'editmywatchlist' )
 189                                 && $this->getRelevantTitle()->canExist()
 190                         ) {
 191                                 $modules['watch'][] = 'mediawiki.page.watch.ajax';
 192                         }
 193
 194                         $modules['search'][] = 'mediawiki.searchSuggest';
 195                 }
 196
 197                 if ( $user->getBoolOption( 'editsectiononrightclick' ) ) {
 198                         $modules['user'][] = 'mediawiki.action.view.rightClickEdit';
 199                 }
 200
 201                 // Crazy edit-on-double-click stuff
 202                 if ( $out->isArticle() && $user->getOption( 'editondblclick' ) ) {
 203                         $modules['user'][] = 'mediawiki.action.view.dblClickEdit';
 204                 }
 205                 return $modules;
 206         }
 207
 208         /**
 209          * Preload the existence of three commonly-requested pages in a single query
 210          */
 211         protected function preloadExistence() {
 212                 $titles = [];
 213
 214                 // User/talk link
 215                 $user = $this->getUser();
 216                 if ( $user->isLoggedIn() ) {
 217                         $titles[] = $user->getUserPage();
 218                         $titles[] = $user->getTalkPage();
 219                 }
 220
 221                 // Check, if the page can hold some kind of content, otherwise do nothing
 222                 $title = $this->getRelevantTitle();
 223                 if ( $title->canExist() ) {
 224                         if ( $title->isTalkPage() ) {
 225                                 $titles[] = $title->getSubjectPage();
 226                         } else {
 227                                 $titles[] = $title->getTalkPage();
 228                         }
 229                 }
 230
 231                 // Footer links (used by SkinTemplate::prepareQuickTemplate)
 232                 foreach ( [
 233                         $this->footerLinkTitle( 'privacy', 'privacypage' ),
 234                         $this->footerLinkTitle( 'aboutsite', 'aboutpage' ),
 235                         $this->footerLinkTitle( 'disclaimers', 'disclaimerpage' ),
 236                 ] as $title ) {
 237                         if ( $title ) {
 238                                 $titles[] = $title;
 239                         }
 240                 }
 241
 242                 Hooks::run( 'SkinPreloadExistence', [ &$titles, $this ] );
 243
 244                 if ( $titles ) {
 245                         $lb = new LinkBatch( $titles );
 246                         $lb->setCaller( __METHOD__ );
 247                         $lb->execute();
 248                 }
 249         }
 250
 251         /**
 252          * Get the current revision ID
 253          *
 254          * @return int
 255          */
 256         public function getRevisionId() {
 257                 return $this->getOutput()->getRevisionId();
 258         }
 259
 260         /**
 261          * Whether the revision displayed is the latest revision of the page
 262          *
 263          * @return bool
 264          */
 265         public function isRevisionCurrent() {
 266                 $revID = $this->getRevisionId();
 267                 return $revID == 0 || $revID == $this->getTitle()->getLatestRevID();
 268         }
 269
 270         /**
 271          * Set the "relevant" title
 272          * @see self::getRelevantTitle()
 273          * @param Title $t
 274          */
 275         public function setRelevantTitle( $t ) {
 276                 $this->mRelevantTitle = $t;
 277         }
 278
 279         /**
 280          * Return the "relevant" title.
 281          * A "relevant" title is not necessarily the actual title of the page.
 282          * Special pages like Special:MovePage use set the page they are acting on
 283          * as their "relevant" title, this allows the skin system to display things
 284          * such as content tabs which belong to to that page instead of displaying
 285          * a basic special page tab which has almost no meaning.
 286          *
 287          * @return Title
 288          */
 289         public function getRelevantTitle() {
 290                 if ( isset( $this->mRelevantTitle ) ) {
 291                         return $this->mRelevantTitle;
 292                 }
 293                 return $this->getTitle();
 294         }
 295
 296         /**
 297          * Set the "relevant" user
 298          * @see self::getRelevantUser()
 299          * @param User $u
 300          */
 301         public function setRelevantUser( $u ) {
 302                 $this->mRelevantUser = $u;
 303         }
 304
 305         /**
 306          * Return the "relevant" user.
 307          * A "relevant" user is similar to a relevant title. Special pages like
 308          * Special:Contributions mark the user which they are relevant to so that
 309          * things like the toolbox can display the information they usually are only
 310          * able to display on a user's userpage and talkpage.
 311          * @return User
 312          */
 313         public function getRelevantUser() {
 314                 if ( isset( $this->mRelevantUser ) ) {
 315                         return $this->mRelevantUser;
 316                 }
 317                 $title = $this->getRelevantTitle();
 318                 if ( $title->hasSubjectNamespace( NS_USER ) ) {
 319                         $rootUser = $title->getRootText();
 320                         if ( User::isIP( $rootUser ) ) {
 321                                 $this->mRelevantUser = User::newFromName( $rootUser, false );
 322                         } else {
 323                                 $user = User::newFromName( $rootUser, false );
 324
 325                                 if ( $user ) {
 326                                         $user->load( User::READ_NORMAL );
 327
 328                                         if ( $user->isLoggedIn() ) {
 329                                                 $this->mRelevantUser = $user;
 330                                         }
 331                                 }
 332                         }
 333                         return $this->mRelevantUser;
 334                 }
 335                 return null;
 336         }
 337
 338         /**
 339          * Outputs the HTML generated by other functions.
 340          * @param OutputPage $out
 341          */
 342         abstract function outputPage( OutputPage $out = null );
 343
 344         /**
 345          * @param array $data
 346          * @return string
 347          */
 348         static function makeVariablesScript( $data ) {
 349                 if ( $data ) {
 350                         return ResourceLoader::makeInlineScript(
 351                                 ResourceLoader::makeConfigSetScript( $data )
 352                         );
 353                 } else {
 354                         return '';
 355                 }
 356         }
 357
 358         /**
 359          * Get the query to generate a dynamic stylesheet
 360          *
 361          * @return array
 362          */
 363         public static function getDynamicStylesheetQuery() {
 364                 global $wgSquidMaxage;
 365
 366                 return [
 367                                 'action' => 'raw',
 368                                 'maxage' => $wgSquidMaxage,
 369                                 'usemsgcache' => 'yes',
 370                                 'ctype' => 'text/css',
 371                                 'smaxage' => $wgSquidMaxage,
 372                         ];
 373         }
 374
 375         /**
 376          * Add skin specific stylesheets
 377          * Calling this method with an $out of anything but the same OutputPage
 378          * inside ->getOutput() is deprecated. The $out arg is kept
 379          * for compatibility purposes with skins.
 380          * @param OutputPage $out
 381          * @todo delete
 382          */
 383         abstract function setupSkinUserCss( OutputPage $out );
 384
 385         /**
 386          * TODO: document
 387          * @param Title $title
 388          * @return string
 389          */
 390         function getPageClasses( $title ) {
 391                 $numeric = 'ns-' . $title->getNamespace();
 392
 393                 if ( $title->isSpecialPage() ) {
 394                         $type = 'ns-special';
 395                         // T25315: provide a class based on the canonical special page name without subpages
 396                         list( $canonicalName ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );
 397                         if ( $canonicalName ) {
 398                                 $type .= ' ' . Sanitizer::escapeClass( "mw-special-$canonicalName" );
 399                         } else {
 400                                 $type .= ' mw-invalidspecialpage';
 401                         }
 402                 } elseif ( $title->isTalkPage() ) {
 403                         $type = 'ns-talk';
 404                 } else {
 405                         $type = 'ns-subject';
 406                 }
 407
 408                 $name = Sanitizer::escapeClass( 'page-' . $title->getPrefixedText() );
 409                 $root = Sanitizer::escapeClass( 'rootpage-' . $title->getRootTitle()->getPrefixedText() );
 410
 411                 return "$numeric $type $name $root";
 412         }
 413
 414         /**
 415          * Return values for <html> element
 416          * @return array Array of associative name-to-value elements for <html> element
 417          */
 418         public function getHtmlElementAttributes() {
 419                 $lang = $this->getLanguage();
 420                 return [
 421                         'lang' => $lang->getHtmlCode(),
 422                         'dir' => $lang->getDir(),
 423                         'class' => 'client-nojs',
 424                 ];
 425         }
 426
 427         /**
 428          * This will be called by OutputPage::headElement when it is creating the
 429          * "<body>" tag, skins can override it if they have a need to add in any
 430          * body attributes or classes of their own.
 431          * @param OutputPage $out
 432          * @param array $bodyAttrs
 433          */
 434         function addToBodyAttributes( $out, &$bodyAttrs ) {
 435                 // does nothing by default
 436         }
 437
 438         /**
 439          * URL to the logo
 440          * @return string
 441          */
 442         function getLogo() {
 443                 global $wgLogo;
 444                 return $wgLogo;
 445         }
 446
 447         /**
 448          * Whether the logo should be preloaded with an HTTP link header or not
 449          * @since 1.29
 450          * @return bool
 451          */
 452         public function shouldPreloadLogo() {
 453                 return false;
 454         }
 455
 456         /**
 457          * @return string HTML
 458          */
 459         function getCategoryLinks() {
 460                 global $wgUseCategoryBrowser;
 461
 462                 $out = $this->getOutput();
 463                 $allCats = $out->getCategoryLinks();
 464
 465                 if ( !count( $allCats ) ) {
 466                         return '';
 467                 }
 468
 469                 $embed = "<li>";
 470                 $pop = "</li>";
 471
 472                 $s = '';
 473                 $colon = $this->msg( 'colon-separator' )->escaped();
 474
 475                 if ( !empty( $allCats['normal'] ) ) {
 476                         $t = $embed . implode( "{$pop}{$embed}", $allCats['normal'] ) . $pop;
 477
 478                         $msg = $this->msg( 'pagecategories' )->numParams( count( $allCats['normal'] ) )->escaped();
 479                         $linkPage = wfMessage( 'pagecategorieslink' )->inContentLanguage()->text();
 480                         $title = Title::newFromText( $linkPage );
 481                         $link = $title ? Linker::link( $title, $msg ) : $msg;
 482                         $s .= '<div id="mw-normal-catlinks" class="mw-normal-catlinks">' .
 483                                 $link . $colon . '<ul>' . $t . '</ul>' . '</div>';
 484                 }
 485
 486                 # Hidden categories
 487                 if ( isset( $allCats['hidden'] ) ) {
 488                         if ( $this->getUser()->getBoolOption( 'showhiddencats' ) ) {
 489                                 $class = ' mw-hidden-cats-user-shown';
 490                         } elseif ( $this->getTitle()->getNamespace() == NS_CATEGORY ) {
 491                                 $class = ' mw-hidden-cats-ns-shown';
 492                         } else {
 493                                 $class = ' mw-hidden-cats-hidden';
 494                         }
 495
 496                         $s .= "<div id=\"mw-hidden-catlinks\" class=\"mw-hidden-catlinks$class\">" .
 497                                 $this->msg( 'hidden-categories' )->numParams( count( $allCats['hidden'] ) )->escaped() .
 498                                 $colon . '<ul>' . $embed . implode( "{$pop}{$embed}", $allCats['hidden'] ) . $pop . '</ul>' .
 499                                 '</div>';
 500                 }
 501
 502                 # optional 'dmoz-like' category browser. Will be shown under the list
 503                 # of categories an article belong to
 504                 if ( $wgUseCategoryBrowser ) {
 505                         $s .= '<br /><hr />';
 506
 507                         # get a big array of the parents tree
 508                         $parenttree = $this->getTitle()->getParentCategoryTree();
 509                         # Skin object passed by reference cause it can not be
 510                         # accessed under the method subfunction drawCategoryBrowser
 511                         $tempout = explode( "\n", $this->drawCategoryBrowser( $parenttree ) );
 512                         # Clean out bogus first entry and sort them
 513                         unset( $tempout[0] );
 514                         asort( $tempout );
 515                         # Output one per line
 516                         $s .= implode( "<br />\n", $tempout );
 517                 }
 518
 519                 return $s;
 520         }
 521
 522         /**
 523          * Render the array as a series of links.
 524          * @param array $tree Categories tree returned by Title::getParentCategoryTree
 525          * @return string Separated by &gt;, terminate with "\n"
 526          */
 527         function drawCategoryBrowser( $tree ) {
 528                 $return = '';
 529
 530                 foreach ( $tree as $element => $parent ) {
 531                         if ( empty( $parent ) ) {
 532                                 # element start a new list
 533                                 $return .= "\n";
 534                         } else {
 535                                 # grab the others elements
 536                                 $return .= $this->drawCategoryBrowser( $parent ) . ' &gt; ';
 537                         }
 538
 539                         # add our current element to the list
 540                         $eltitle = Title::newFromText( $element );
 541                         $return .= Linker::link( $eltitle, htmlspecialchars( $eltitle->getText() ) );
 542                 }
 543
 544                 return $return;
 545         }
 546
 547         /**
 548          * @return string HTML
 549          */
 550         function getCategories() {
 551                 $out = $this->getOutput();
 552                 $catlinks = $this->getCategoryLinks();
 553
 554                 // Check what we're showing
 555                 $allCats = $out->getCategoryLinks();
 556                 $showHidden = $this->getUser()->getBoolOption( 'showhiddencats' ) ||
 557                                                 $this->getTitle()->getNamespace() == NS_CATEGORY;
 558
 559                 $classes = [ 'catlinks' ];
 560                 if ( empty( $allCats['normal'] ) && !( !empty( $allCats['hidden'] ) && $showHidden ) ) {
 561                         $classes[] = 'catlinks-allhidden';
 562                 }
 563
 564                 return Html::rawElement(
 565                         'div',
 566                         [ 'id' => 'catlinks', 'class' => $classes, 'data-mw' => 'interface' ],
 567                         $catlinks
 568                 );
 569         }
 570
 571         /**
 572          * This runs a hook to allow extensions placing their stuff after content
 573          * and article metadata (e.g. categories).
 574          * Note: This function has nothing to do with afterContent().
 575          *
 576          * This hook is placed here in order to allow using the same hook for all
 577          * skins, both the SkinTemplate based ones and the older ones, which directly
 578          * use this class to get their data.
 579          *
 580          * The output of this function gets processed in SkinTemplate::outputPage() for
 581          * the SkinTemplate based skins, all other skins should directly echo it.
 582          *
 583          * @return string Empty by default, if not changed by any hook function.
 584          */
 585         protected function afterContentHook() {
 586                 $data = '';
 587
 588                 if ( Hooks::run( 'SkinAfterContent', [ &$data, $this ] ) ) {
 589                         // adding just some spaces shouldn't toggle the output
 590                         // of the whole <div/>, so we use trim() here
 591                         if ( trim( $data ) != '' ) {
 592                                 // Doing this here instead of in the skins to
 593                                 // ensure that the div has the same ID in all
 594                                 // skins
 595                                 $data = "<div id='mw-data-after-content'>\n" .
 596                                         "\t$data\n" .
 597                                         "</div>\n";
 598                         }
 599                 } else {
 600                         wfDebug( "Hook SkinAfterContent changed output processing.\n" );
 601                 }
 602
 603                 return $data;
 604         }
 605
 606         /**
 607          * Generate debug data HTML for displaying at the bottom of the main content
 608          * area.
 609          * @return string HTML containing debug data, if enabled (otherwise empty).
 610          */
 611         protected function generateDebugHTML() {
 612                 return MWDebug::getHTMLDebugLog();
 613         }
 614
 615         /**
 616          * This gets called shortly before the "</body>" tag.
 617          *
 618          * @return string HTML-wrapped JS code to be put before "</body>"
 619          */
 620         function bottomScripts() {
 621                 // TODO and the suckage continues. This function is really just a wrapper around
 622                 // OutputPage::getBottomScripts() which takes a Skin param. This should be cleaned
 623                 // up at some point
 624                 $bottomScriptText = $this->getOutput()->getBottomScripts();
 625                 Hooks::run( 'SkinAfterBottomScripts', [ $this, &$bottomScriptText ] );
 626
 627                 return $bottomScriptText;
 628         }
 629
 630         /**
 631          * Text with the permalink to the source page,
 632          * usually shown on the footer of a printed page
 633          *
 634          * @return string HTML text with an URL
 635          */
 636         function printSource() {
 637                 $oldid = $this->getRevisionId();
 638                 if ( $oldid ) {
 639                         $canonicalUrl = $this->getTitle()->getCanonicalURL( 'oldid=' . $oldid );
 640                         $url = htmlspecialchars( wfExpandIRI( $canonicalUrl ) );
 641                 } else {
 642                         // oldid not available for non existing pages
 643                         $url = htmlspecialchars( wfExpandIRI( $this->getTitle()->getCanonicalURL() ) );
 644                 }
 645
 646                 return $this->msg( 'retrievedfrom' )
 647                         ->rawParams( '<a dir="ltr" href="' . $url . '">' . $url . '</a>' )
 648                         ->parse();
 649         }
 650
 651         /**
 652          * @return string HTML
 653          */
 654         function getUndeleteLink() {
 655                 $action = $this->getRequest()->getVal( 'action', 'view' );
 656
 657                 if ( $this->getTitle()->userCan( 'deletedhistory', $this->getUser() ) &&
 658                         ( !$this->getTitle()->exists() || $action == 'history' ) ) {
 659                         $n = $this->getTitle()->isDeleted();
 660
 661                         if ( $n ) {
 662                                 if ( $this->getTitle()->quickUserCan( 'undelete', $this->getUser() ) ) {
 663                                         $msg = 'thisisdeleted';
 664                                 } else {
 665                                         $msg = 'viewdeleted';
 666                                 }
 667
 668                                 return $this->msg( $msg )->rawParams(
 669                                         Linker::linkKnown(
 670                                                 SpecialPage::getTitleFor( 'Undelete', $this->getTitle()->getPrefixedDBkey() ),
 671                                                 $this->msg( 'restorelink' )->numParams( $n )->escaped() )
 672                                         )->escaped();
 673                         }
 674                 }
 675
 676                 return '';
 677         }
 678
 679         /**
 680          * @param OutputPage $out Defaults to $this->getOutput() if left as null
 681          * @return string
 682          */
 683         function subPageSubtitle( $out = null ) {
 684                 if ( $out === null ) {
 685                         $out = $this->getOutput();
 686                 }
 687                 $title = $out->getTitle();
 688                 $subpages = '';
 689
 690                 if ( !Hooks::run( 'SkinSubPageSubtitle', [ &$subpages, $this, $out ] ) ) {
 691                         return $subpages;
 692                 }
 693
 694                 if ( $out->isArticle() && MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 695                         $ptext = $title->getPrefixedText();
 696                         if ( strpos( $ptext, '/' ) !== false ) {
 697                                 $links = explode( '/', $ptext );
 698                                 array_pop( $links );
 699                                 $c = 0;
 700                                 $growinglink = '';
 701                                 $display = '';
 702                                 $lang = $this->getLanguage();
 703
 704                                 foreach ( $links as $link ) {
 705                                         $growinglink .= $link;
 706                                         $display .= $link;
 707                                         $linkObj = Title::newFromText( $growinglink );
 708
 709                                         if ( is_object( $linkObj ) && $linkObj->isKnown() ) {
 710                                                 $getlink = Linker::linkKnown(
 711                                                         $linkObj,
 712                                                         htmlspecialchars( $display )
 713                                                 );
 714
 715                                                 $c++;
 716
 717                                                 if ( $c > 1 ) {
 718                                                         $subpages .= $lang->getDirMarkEntity() . $this->msg( 'pipe-separator' )->escaped();
 719                                                 } else {
 720                                                         $subpages .= '&lt; ';
 721                                                 }
 722
 723                                                 $subpages .= $getlink;
 724                                                 $display = '';
 725                                         } else {
 726                                                 $display .= '/';
 727                                         }
 728                                         $growinglink .= '/';
 729                                 }
 730                         }
 731                 }
 732
 733                 return $subpages;
 734         }
 735
 736         /**
 737          * @deprecated since 1.27, feature removed
 738          * @return bool Always false
 739          */
 740         function showIPinHeader() {
 741                 wfDeprecated( __METHOD__, '1.27' );
 742                 return false;
 743         }
 744
 745         /**
 746          * @return string
 747          */
 748         function getSearchLink() {
 749                 $searchPage = SpecialPage::getTitleFor( 'Search' );
 750                 return $searchPage->getLocalURL();
 751         }
 752
 753         /**
 754          * @return string
 755          */
 756         function escapeSearchLink() {
 757                 return htmlspecialchars( $this->getSearchLink() );
 758         }
 759
 760         /**
 761          * @param string $type
 762          * @return string
 763          */
 764         function getCopyright( $type = 'detect' ) {
 765                 global $wgRightsPage, $wgRightsUrl, $wgRightsText;
 766
 767                 if ( $type == 'detect' ) {
 768                         if ( !$this->isRevisionCurrent()
 769                                 && !$this->msg( 'history_copyright' )->inContentLanguage()->isDisabled()
 770                         ) {
 771                                 $type = 'history';
 772                         } else {
 773                                 $type = 'normal';
 774                         }
 775                 }
 776
 777                 if ( $type == 'history' ) {
 778                         $msg = 'history_copyright';
 779                 } else {
 780                         $msg = 'copyright';
 781                 }
 782
 783                 if ( $wgRightsPage ) {
 784                         $title = Title::newFromText( $wgRightsPage );
 785                         $link = Linker::linkKnown( $title, $wgRightsText );
 786                 } elseif ( $wgRightsUrl ) {
 787                         $link = Linker::makeExternalLink( $wgRightsUrl, $wgRightsText );
 788                 } elseif ( $wgRightsText ) {
 789                         $link = $wgRightsText;
 790                 } else {
 791                         # Give up now
 792                         return '';
 793                 }
 794
 795                 // Allow for site and per-namespace customization of copyright notice.
 796                 // @todo Remove deprecated $forContent param from hook handlers and then remove here.
 797                 $forContent = true;
 798
 799                 Hooks::run(
 800                         'SkinCopyrightFooter',
 801                         [ $this->getTitle(), $type, &$msg, &$link, &$forContent ]
 802                 );
 803
 804                 return $this->msg( $msg )->rawParams( $link )->text();
 805         }
 806
 807         /**
 808          * @return null|string
 809          */
 810         function getCopyrightIcon() {
 811                 global $wgRightsUrl, $wgRightsText, $wgRightsIcon, $wgFooterIcons;
 812
 813                 $out = '';
 814
 815                 if ( $wgFooterIcons['copyright']['copyright'] ) {
 816                         $out = $wgFooterIcons['copyright']['copyright'];
 817                 } elseif ( $wgRightsIcon ) {
 818                         $icon = htmlspecialchars( $wgRightsIcon );
 819
 820                         if ( $wgRightsUrl ) {
 821                                 $url = htmlspecialchars( $wgRightsUrl );
 822                                 $out .= '<a href="' . $url . '">';
 823                         }
 824
 825                         $text = htmlspecialchars( $wgRightsText );
 826                         $out .= "<img src=\"$icon\" alt=\"$text\" width=\"88\" height=\"31\" />";
 827
 828                         if ( $wgRightsUrl ) {
 829                                 $out .= '</a>';
 830                         }
 831                 }
 832
 833                 return $out;
 834         }
 835
 836         /**
 837          * Gets the powered by MediaWiki icon.
 838          * @return string
 839          */
 840         function getPoweredBy() {
 841                 global $wgResourceBasePath;
 842
 843                 $url1 = htmlspecialchars(
 844                         "$wgResourceBasePath/resources/assets/poweredby_mediawiki_88x31.png"
 845                 );
 846                 $url1_5 = htmlspecialchars(
 847                         "$wgResourceBasePath/resources/assets/poweredby_mediawiki_132x47.png"
 848                 );
 849                 $url2 = htmlspecialchars(
 850                         "$wgResourceBasePath/resources/assets/poweredby_mediawiki_176x62.png"
 851                 );
 852                 $text = '<a href="//www.mediawiki.org/"><img src="' . $url1
 853                         . '" srcset="' . $url1_5 . ' 1.5x, ' . $url2 . ' 2x" '
 854                         . 'height="31" width="88" alt="Powered by MediaWiki" /></a>';
 855                 Hooks::run( 'SkinGetPoweredBy', [ &$text, $this ] );
 856                 return $text;
 857         }
 858
 859         /**
 860          * Get the timestamp of the latest revision, formatted in user language
 861          *
 862          * @return string
 863          */
 864         protected function lastModified() {
 865                 $timestamp = $this->getOutput()->getRevisionTimestamp();
 866
 867                 # No cached timestamp, load it from the database
 868                 if ( $timestamp === null ) {
 869                         $timestamp = Revision::getTimestampFromId( $this->getTitle(), $this->getRevisionId() );
 870                 }
 871
 872                 if ( $timestamp ) {
 873                         $d = $this->getLanguage()->userDate( $timestamp, $this->getUser() );
 874                         $t = $this->getLanguage()->userTime( $timestamp, $this->getUser() );
 875                         $s = ' ' . $this->msg( 'lastmodifiedat', $d, $t )->parse();
 876                 } else {
 877                         $s = '';
 878                 }
 879
 880                 if ( wfGetLB()->getLaggedReplicaMode() ) {
 881                         $s .= ' <strong>' . $this->msg( 'laggedslavemode' )->parse() . '</strong>';
 882                 }
 883
 884                 return $s;
 885         }
 886
 887         /**
 888          * @param string $align
 889          * @return string
 890          */
 891         function logoText( $align = '' ) {
 892                 if ( $align != '' ) {
 893                         $a = " style='float: {$align};'";
 894                 } else {
 895                         $a = '';
 896                 }
 897
 898                 $mp = $this->msg( 'mainpage' )->escaped();
 899                 $mptitle = Title::newMainPage();
 900                 $url = ( is_object( $mptitle ) ? htmlspecialchars( $mptitle->getLocalURL() ) : '' );
 901
 902                 $logourl = $this->getLogo();
 903                 $s = "<a href='{$url}'><img{$a} src='{$logourl}' alt='[{$mp}]' /></a>";
 904
 905                 return $s;
 906         }
 907
 908         /**
 909          * Renders a $wgFooterIcons icon according to the method's arguments
 910          * @param array $icon The icon to build the html for, see $wgFooterIcons
 911          *   for the format of this array.
 912          * @param bool|string $withImage Whether to use the icon's image or output
 913          *   a text-only footericon.
 914          * @return string HTML
 915          */
 916         function makeFooterIcon( $icon, $withImage = 'withImage' ) {
 917                 if ( is_string( $icon ) ) {
 918                         $html = $icon;
 919                 } else { // Assuming array
 920                         $url = isset( $icon["url"] ) ? $icon["url"] : null;
 921                         unset( $icon["url"] );
 922                         if ( isset( $icon["src"] ) && $withImage === 'withImage' ) {
 923                                 // do this the lazy way, just pass icon data as an attribute array
 924                                 $html = Html::element( 'img', $icon );
 925                         } else {
 926                                 $html = htmlspecialchars( $icon["alt"] );
 927                         }
 928                         if ( $url ) {
 929                                 global $wgExternalLinkTarget;
 930                                 $html = Html::rawElement( 'a',
 931                                         [ "href" => $url, "target" => $wgExternalLinkTarget ],
 932                                         $html );
 933                         }
 934                 }
 935                 return $html;
 936         }
 937
 938         /**
 939          * Gets the link to the wiki's main page.
 940          * @return string
 941          */
 942         function mainPageLink() {
 943                 $s = Linker::linkKnown(
 944                         Title::newMainPage(),
 945                         $this->msg( 'mainpage' )->escaped()
 946                 );
 947
 948                 return $s;
 949         }
 950
 951         /**
 952          * Returns an HTML link for use in the footer
 953          * @param string $desc The i18n message key for the link text
 954          * @param string $page The i18n message key for the page to link to
 955          * @return string HTML anchor
 956          */
 957         public function footerLink( $desc, $page ) {
 958                 $title = $this->footerLinkTitle( $desc, $page );
 959                 if ( !$title ) {
 960                         return '';
 961                 }
 962
 963                 return Linker::linkKnown(
 964                         $title,
 965                         $this->msg( $desc )->escaped()
 966                 );
 967         }
 968
 969         /**
 970          * @param string $desc
 971          * @param string $page
 972          * @return Title|null
 973          */
 974         private function footerLinkTitle( $desc, $page ) {
 975                 // If the link description has been set to "-" in the default language,
 976                 if ( $this->msg( $desc )->inContentLanguage()->isDisabled() ) {
 977                         // then it is disabled, for all languages.
 978                         return null;
 979                 }
 980                 // Otherwise, we display the link for the user, described in their
 981                 // language (which may or may not be the same as the default language),
 982                 // but we make the link target be the one site-wide page.
 983                 $title = Title::newFromText( $this->msg( $page )->inContentLanguage()->text() );
 984
 985                 return $title ?: null;
 986         }
 987
 988         /**
 989          * Gets the link to the wiki's privacy policy page.
 990          * @return string HTML
 991          */
 992         function privacyLink() {
 993                 return $this->footerLink( 'privacy', 'privacypage' );
 994         }
 995
 996         /**
 997          * Gets the link to the wiki's about page.
 998          * @return string HTML
 999          */
1000         function aboutLink() {
1001                 return $this->footerLink( 'aboutsite', 'aboutpage' );
1002         }
1003
1004         /**
1005          * Gets the link to the wiki's general disclaimers page.
1006          * @return string HTML
1007          */
1008         function disclaimerLink() {
1009                 return $this->footerLink( 'disclaimers', 'disclaimerpage' );
1010         }
1011
1012         /**
1013          * Return URL options for the 'edit page' link.
1014          * This may include an 'oldid' specifier, if the current page view is such.
1015          *
1016          * @return array
1017          * @private
1018          */
1019         function editUrlOptions() {
1020                 $options = [ 'action' => 'edit' ];
1021
1022                 if ( !$this->isRevisionCurrent() ) {
1023                         $options['oldid'] = intval( $this->getRevisionId() );
1024                 }
1025
1026                 return $options;
1027         }
1028
1029         /**
1030          * @param User|int $id
1031          * @return bool
1032          */
1033         function showEmailUser( $id ) {
1034                 if ( $id instanceof User ) {
1035                         $targetUser = $id;
1036                 } else {
1037                         $targetUser = User::newFromId( $id );
1038                 }
1039
1040                 # The sending user must have a confirmed email address and the target
1041                 # user must have a confirmed email address and allow emails from users.
1042                 return $this->getUser()->canSendEmail() &&
1043                         $targetUser->canReceiveEmail();
1044         }
1045
1046         /**
1047          * Return a fully resolved style path url to images or styles stored in the current skins's folder.
1048          * This method returns a url resolved using the configured skin style path
1049          * and includes the style version inside of the url.
1050          *
1051          * Requires $stylename to be set, otherwise throws MWException.
1052          *
1053          * @param string $name The name or path of a skin resource file
1054          * @return string The fully resolved style path url including styleversion
1055          * @throws MWException
1056          */
1057         function getSkinStylePath( $name ) {
1058                 global $wgStylePath, $wgStyleVersion;
1059
1060                 if ( $this->stylename === null ) {
1061                         $class = static::class;
1062                         throw new MWException( "$class::\$stylename must be set to use getSkinStylePath()" );
1063                 }
1064
1065                 return "$wgStylePath/{$this->stylename}/$name?$wgStyleVersion";
1066         }
1067
1068         /* these are used extensively in SkinTemplate, but also some other places */
1069
1070         /**
1071          * @param string $urlaction
1072          * @return string
1073          */
1074         static function makeMainPageUrl( $urlaction = '' ) {
1075                 $title = Title::newMainPage();
1076                 self::checkTitle( $title, '' );
1077
1078                 return $title->getLocalURL( $urlaction );
1079         }
1080
1081         /**
1082          * Make a URL for a Special Page using the given query and protocol.
1083          *
1084          * If $proto is set to null, make a local URL. Otherwise, make a full
1085          * URL with the protocol specified.
1086          *
1087          * @param string $name Name of the Special page
1088          * @param string $urlaction Query to append
1089          * @param string|null $proto Protocol to use or null for a local URL
1090          * @return string
1091          */
1092         static function makeSpecialUrl( $name, $urlaction = '', $proto = null ) {
1093                 $title = SpecialPage::getSafeTitleFor( $name );
1094                 if ( is_null( $proto ) ) {
1095                         return $title->getLocalURL( $urlaction );
1096                 } else {
1097                         return $title->getFullURL( $urlaction, false, $proto );
1098                 }
1099         }
1100
1101         /**
1102          * @param string $name
1103          * @param string $subpage
1104          * @param string $urlaction
1105          * @return string
1106          */
1107         static function makeSpecialUrlSubpage( $name, $subpage, $urlaction = '' ) {
1108                 $title = SpecialPage::getSafeTitleFor( $name, $subpage );
1109                 return $title->getLocalURL( $urlaction );
1110         }
1111
1112         /**
1113          * @param string $name
1114          * @param string $urlaction
1115          * @return string
1116          */
1117         static function makeI18nUrl( $name, $urlaction = '' ) {
1118                 $title = Title::newFromText( wfMessage( $name )->inContentLanguage()->text() );
1119                 self::checkTitle( $title, $name );
1120                 return $title->getLocalURL( $urlaction );
1121         }
1122
1123         /**
1124          * @param string $name
1125          * @param string $urlaction
1126          * @return string
1127          */
1128         static function makeUrl( $name, $urlaction = '' ) {
1129                 $title = Title::newFromText( $name );
1130                 self::checkTitle( $title, $name );
1131
1132                 return $title->getLocalURL( $urlaction );
1133         }
1134
1135         /**
1136          * If url string starts with http, consider as external URL, else
1137          * internal
1138          * @param string $name
1139          * @return string URL
1140          */
1141         static function makeInternalOrExternalUrl( $name ) {
1142                 if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $name ) ) {
1143                         return $name;
1144                 } else {
1145                         return self::makeUrl( $name );
1146                 }
1147         }
1148
1149         /**
1150          * this can be passed the NS number as defined in Language.php
1151          * @param string $name
1152          * @param string $urlaction
1153          * @param int $namespace
1154          * @return string
1155          */
1156         static function makeNSUrl( $name, $urlaction = '', $namespace = NS_MAIN ) {
1157                 $title = Title::makeTitleSafe( $namespace, $name );
1158                 self::checkTitle( $title, $name );
1159
1160                 return $title->getLocalURL( $urlaction );
1161         }
1162
1163         /**
1164          * these return an array with the 'href' and boolean 'exists'
1165          * @param string $name
1166          * @param string $urlaction
1167          * @return array
1168          */
1169         static function makeUrlDetails( $name, $urlaction = '' ) {
1170                 $title = Title::newFromText( $name );
1171                 self::checkTitle( $title, $name );
1172
1173                 return [
1174                         'href' => $title->getLocalURL( $urlaction ),
1175                         'exists' => $title->isKnown(),
1176                 ];
1177         }
1178
1179         /**
1180          * Make URL details where the article exists (or at least it's convenient to think so)
1181          * @param string $name Article name
1182          * @param string $urlaction
1183          * @return array
1184          */
1185         static function makeKnownUrlDetails( $name, $urlaction = '' ) {
1186                 $title = Title::newFromText( $name );
1187                 self::checkTitle( $title, $name );
1188
1189                 return [
1190                         'href' => $title->getLocalURL( $urlaction ),
1191                         'exists' => true
1192                 ];
1193         }
1194
1195         /**
1196          * make sure we have some title to operate on
1197          *
1198          * @param Title $title
1199          * @param string $name
1200          */
1201         static function checkTitle( &$title, $name ) {
1202                 if ( !is_object( $title ) ) {
1203                         $title = Title::newFromText( $name );
1204                         if ( !is_object( $title ) ) {
1205                                 $title = Title::newFromText( '--error: link target missing--' );
1206                         }
1207                 }
1208         }
1209
1210         /**
1211          * Build an array that represents the sidebar(s), the navigation bar among them.
1212          *
1213          * BaseTemplate::getSidebar can be used to simplify the format and id generation in new skins.
1214          *
1215          * The format of the returned array is [ heading => content, ... ], where:
1216          * - heading is the heading of a navigation portlet. It is either:
1217          *   - magic string to be handled by the skins ('SEARCH' / 'LANGUAGES' / 'TOOLBOX' / ...)
1218          *   - a message name (e.g. 'navigation'), the message should be HTML-escaped by the skin
1219          *   - plain text, which should be HTML-escaped by the skin
1220          * - content is the contents of the portlet. It is either:
1221          *   - HTML text (<ul><li>...</li>...</ul>)
1222          *   - array of link data in a format accepted by BaseTemplate::makeListItem()
1223          *   - (for a magic string as a key, any value)
1224          *
1225          * Note that extensions can control the sidebar contents using the SkinBuildSidebar hook
1226          * and can technically insert anything in here; skin creators are expected to handle
1227          * values described above.
1228          *
1229          * @return array
1230          */
1231         function buildSidebar() {
1232                 global $wgEnableSidebarCache, $wgSidebarCacheExpiry;
1233
1234                 $that = $this;
1235                 $callback = function () use ( $that ) {
1236                         $bar = [];
1237                         $that->addToSidebar( $bar, 'sidebar' );
1238                         Hooks::run( 'SkinBuildSidebar', [ $that, &$bar ] );
1239
1240                         return $bar;
1241                 };
1242
1243                 if ( $wgEnableSidebarCache ) {
1244                         $cache = ObjectCache::getMainWANInstance();
1245                         $sidebar = $cache->getWithSetCallback(
1246                                 $cache->makeKey( 'sidebar', $this->getLanguage()->getCode() ),
1247                                 MessageCache::singleton()->isDisabled()
1248                                         ? $cache::TTL_UNCACHEABLE // bug T133069
1249                                         : $wgSidebarCacheExpiry,
1250                                 $callback,
1251                                 [ 'lockTSE' => 30 ]
1252                         );
1253                 } else {
1254                         $sidebar = $callback();
1255                 }
1256
1257                 // Apply post-processing to the cached value
1258                 Hooks::run( 'SidebarBeforeOutput', [ $this, &$sidebar ] );
1259
1260                 return $sidebar;
1261         }
1262
1263         /**
1264          * Add content from a sidebar system message
1265          * Currently only used for MediaWiki:Sidebar (but may be used by Extensions)
1266          *
1267          * This is just a wrapper around addToSidebarPlain() for backwards compatibility
1268          *
1269          * @param array $bar
1270          * @param string $message
1271          */
1272         public function addToSidebar( &$bar, $message ) {
1273                 $this->addToSidebarPlain( $bar, wfMessage( $message )->inContentLanguage()->plain() );
1274         }
1275
1276         /**
1277          * Add content from plain text
1278          * @since 1.17
1279          * @param array $bar
1280          * @param string $text
1281          * @return array
1282          */
1283         function addToSidebarPlain( &$bar, $text ) {
1284                 $lines = explode( "\n", $text );
1285
1286                 $heading = '';
1287                 $messageTitle = $this->getConfig()->get( 'EnableSidebarCache' )
1288                         ? Title::newMainPage() : $this->getTitle();
1289
1290                 foreach ( $lines as $line ) {
1291                         if ( strpos( $line, '*' ) !== 0 ) {
1292                                 continue;
1293                         }
1294                         $line = rtrim( $line, "\r" ); // for Windows compat
1295
1296                         if ( strpos( $line, '**' ) !== 0 ) {
1297                                 $heading = trim( $line, '* ' );
1298                                 if ( !array_key_exists( $heading, $bar ) ) {
1299                                         $bar[$heading] = [];
1300                                 }
1301                         } else {
1302                                 $line = trim( $line, '* ' );
1303
1304                                 if ( strpos( $line, '|' ) !== false ) { // sanity check
1305                                         $line = MessageCache::singleton()->transform( $line, false, null, $messageTitle );
1306                                         $line = array_map( 'trim', explode( '|', $line, 2 ) );
1307                                         if ( count( $line ) !== 2 ) {
1308                                                 // Second sanity check, could be hit by people doing
1309                                                 // funky stuff with parserfuncs... (T35321)
1310                                                 continue;
1311                                         }
1312
1313                                         $extraAttribs = [];
1314
1315                                         $msgLink = $this->msg( $line[0] )->title( $messageTitle )->inContentLanguage();
1316                                         if ( $msgLink->exists() ) {
1317                                                 $link = $msgLink->text();
1318                                                 if ( $link == '-' ) {
1319                                                         continue;
1320                                                 }
1321                                         } else {
1322                                                 $link = $line[0];
1323                                         }
1324                                         $msgText = $this->msg( $line[1] )->title( $messageTitle );
1325                                         if ( $msgText->exists() ) {
1326                                                 $text = $msgText->text();
1327                                         } else {
1328                                                 $text = $line[1];
1329                                         }
1330
1331                                         if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $link ) ) {
1332                                                 $href = $link;
1333
1334                                                 // Parser::getExternalLinkAttribs won't work here because of the Namespace things
1335                                                 global $wgNoFollowLinks, $wgNoFollowDomainExceptions;
1336                                                 if ( $wgNoFollowLinks && !wfMatchesDomainList( $href, $wgNoFollowDomainExceptions ) ) {
1337                                                         $extraAttribs['rel'] = 'nofollow';
1338                                                 }
1339
1340                                                 global $wgExternalLinkTarget;
1341                                                 if ( $wgExternalLinkTarget ) {
1342                                                         $extraAttribs['target'] = $wgExternalLinkTarget;
1343                                                 }
1344                                         } else {
1345                                                 $title = Title::newFromText( $link );
1346
1347                                                 if ( $title ) {
1348                                                         $title = $title->fixSpecialName();
1349                                                         $href = $title->getLinkURL();
1350                                                 } else {
1351                                                         $href = 'INVALID-TITLE';
1352                                                 }
1353                                         }
1354
1355                                         $bar[$heading][] = array_merge( [
1356                                                 'text' => $text,
1357                                                 'href' => $href,
1358                                                 'id' => 'n-' . Sanitizer::escapeId( strtr( $line[1], ' ', '-' ), 'noninitial' ),
1359                                                 'active' => false
1360                                         ], $extraAttribs );
1361                                 } else {
1362                                         continue;
1363                                 }
1364                         }
1365                 }
1366
1367                 return $bar;
1368         }
1369
1370         /**
1371          * Gets new talk page messages for the current user and returns an
1372          * appropriate alert message (or an empty string if there are no messages)
1373          * @return string
1374          */
1375         function getNewtalks() {
1376
1377                 $newMessagesAlert = '';
1378                 $user = $this->getUser();
1379                 $newtalks = $user->getNewMessageLinks();
1380                 $out = $this->getOutput();
1381
1382                 // Allow extensions to disable or modify the new messages alert
1383                 if ( !Hooks::run( 'GetNewMessagesAlert', [ &$newMessagesAlert, $newtalks, $user, $out ] ) ) {
1384                         return '';
1385                 }
1386                 if ( $newMessagesAlert ) {
1387                         return $newMessagesAlert;
1388                 }
1389
1390                 if ( count( $newtalks ) == 1 && $newtalks[0]['wiki'] === wfWikiID() ) {
1391                         $uTalkTitle = $user->getTalkPage();
1392                         $lastSeenRev = isset( $newtalks[0]['rev'] ) ? $newtalks[0]['rev'] : null;
1393                         $nofAuthors = 0;
1394                         if ( $lastSeenRev !== null ) {
1395                                 $plural = true; // Default if we have a last seen revision: if unknown, use plural
1396                                 $latestRev = Revision::newFromTitle( $uTalkTitle, false, Revision::READ_NORMAL );
1397                                 if ( $latestRev !== null ) {
1398                                         // Singular if only 1 unseen revision, plural if several unseen revisions.
1399                                         $plural = $latestRev->getParentId() !== $lastSeenRev->getId();
1400                                         $nofAuthors = $uTalkTitle->countAuthorsBetween(
1401                                                 $lastSeenRev, $latestRev, 10, 'include_new' );
1402                                 }
1403                         } else {
1404                                 // Singular if no revision -> diff link will show latest change only in any case
1405                                 $plural = false;
1406                         }
1407                         $plural = $plural ? 999 : 1;
1408                         // 999 signifies "more than one revision". We don't know how many, and even if we did,
1409                         // the number of revisions or authors is not necessarily the same as the number of
1410                         // "messages".
1411                         $newMessagesLink = Linker::linkKnown(
1412                                 $uTalkTitle,
1413                                 $this->msg( 'newmessageslinkplural' )->params( $plural )->escaped(),
1414                                 [],
1415                                 [ 'redirect' => 'no' ]
1416                         );
1417
1418                         $newMessagesDiffLink = Linker::linkKnown(
1419                                 $uTalkTitle,
1420                                 $this->msg( 'newmessagesdifflinkplural' )->params( $plural )->escaped(),
1421                                 [],
1422                                 $lastSeenRev !== null
1423                                         ? [ 'oldid' => $lastSeenRev->getId(), 'diff' => 'cur' ]
1424                                         : [ 'diff' => 'cur' ]
1425                         );
1426
1427                         if ( $nofAuthors >= 1 && $nofAuthors <= 10 ) {
1428                                 $newMessagesAlert = $this->msg(
1429                                         'youhavenewmessagesfromusers',
1430                                         $newMessagesLink,
1431                                         $newMessagesDiffLink
1432                                 )->numParams( $nofAuthors, $plural );
1433                         } else {
1434                                 // $nofAuthors === 11 signifies "11 or more" ("more than 10")
1435                                 $newMessagesAlert = $this->msg(
1436                                         $nofAuthors > 10 ? 'youhavenewmessagesmanyusers' : 'youhavenewmessages',
1437                                         $newMessagesLink,
1438                                         $newMessagesDiffLink
1439                                 )->numParams( $plural );
1440                         }
1441                         $newMessagesAlert = $newMessagesAlert->text();
1442                         # Disable CDN cache
1443                         $out->setCdnMaxage( 0 );
1444                 } elseif ( count( $newtalks ) ) {
1445                         $sep = $this->msg( 'newtalkseparator' )->escaped();
1446                         $msgs = [];
1447
1448                         foreach ( $newtalks as $newtalk ) {
1449                                 $msgs[] = Xml::element(
1450                                         'a',
1451                                         [ 'href' => $newtalk['link'] ], $newtalk['wiki']
1452                                 );
1453                         }
1454                         $parts = implode( $sep, $msgs );
1455                         $newMessagesAlert = $this->msg( 'youhavenewmessagesmulti' )->rawParams( $parts )->escaped();
1456                         $out->setCdnMaxage( 0 );
1457                 }
1458
1459                 return $newMessagesAlert;
1460         }
1461
1462         /**
1463          * Get a cached notice
1464          *
1465          * @param string $name Message name, or 'default' for $wgSiteNotice
1466          * @return string|bool HTML fragment, or false to indicate that the caller
1467          *   should fall back to the next notice in its sequence
1468          */
1469         private function getCachedNotice( $name ) {
1470                 global $wgRenderHashAppend, $parserMemc, $wgContLang;
1471
1472                 $needParse = false;
1473
1474                 if ( $name === 'default' ) {
1475                         // special case
1476                         global $wgSiteNotice;
1477                         $notice = $wgSiteNotice;
1478                         if ( empty( $notice ) ) {
1479                                 return false;
1480                         }
1481                 } else {
1482                         $msg = $this->msg( $name )->inContentLanguage();
1483                         if ( $msg->isBlank() ) {
1484                                 return '';
1485                         } elseif ( $msg->isDisabled() ) {
1486                                 return false;
1487                         }
1488                         $notice = $msg->plain();
1489                 }
1490
1491                 // Use the extra hash appender to let eg SSL variants separately cache.
1492                 $key = wfMemcKey( $name . $wgRenderHashAppend );
1493                 $cachedNotice = $parserMemc->get( $key );
1494                 if ( is_array( $cachedNotice ) ) {
1495                         if ( md5( $notice ) == $cachedNotice['hash'] ) {
1496                                 $notice = $cachedNotice['html'];
1497                         } else {
1498                                 $needParse = true;
1499                         }
1500                 } else {
1501                         $needParse = true;
1502                 }
1503
1504                 if ( $needParse ) {
1505                         $parsed = $this->getOutput()->parse( $notice );
1506                         $parserMemc->set( $key, [ 'html' => $parsed, 'hash' => md5( $notice ) ], 600 );
1507                         $notice = $parsed;
1508                 }
1509
1510                 $notice = Html::rawElement( 'div', [ 'id' => 'localNotice',
1511                         'lang' => $wgContLang->getHtmlCode(), 'dir' => $wgContLang->getDir() ], $notice );
1512                 return $notice;
1513         }
1514
1515         /**
1516          * Get the site notice
1517          *
1518          * @return string HTML fragment
1519          */
1520         function getSiteNotice() {
1521                 $siteNotice = '';
1522
1523                 if ( Hooks::run( 'SiteNoticeBefore', [ &$siteNotice, $this ] ) ) {
1524                         if ( is_object( $this->getUser() ) && $this->getUser()->isLoggedIn() ) {
1525                                 $siteNotice = $this->getCachedNotice( 'sitenotice' );
1526                         } else {
1527                                 $anonNotice = $this->getCachedNotice( 'anonnotice' );
1528                                 if ( $anonNotice === false ) {
1529                                         $siteNotice = $this->getCachedNotice( 'sitenotice' );
1530                                 } else {
1531                                         $siteNotice = $anonNotice;
1532                                 }
1533                         }
1534                         if ( $siteNotice === false ) {
1535                                 $siteNotice = $this->getCachedNotice( 'default' );
1536                         }
1537                 }
1538
1539                 Hooks::run( 'SiteNoticeAfter', [ &$siteNotice, $this ] );
1540                 return $siteNotice;
1541         }
1542
1543         /**
1544          * Create a section edit link.  This supersedes editSectionLink() and
1545          * editSectionLinkForOther().
1546          *
1547          * @param Title $nt The title being linked to (may not be the same as
1548          *   the current page, if the section is included from a template)
1549          * @param string $section The designation of the section being pointed to,
1550          *   to be included in the link, like "&section=$section"
1551          * @param string $tooltip The tooltip to use for the link: will be escaped
1552          *   and wrapped in the 'editsectionhint' message
1553          * @param string $lang Language code
1554          * @return string HTML to use for edit link
1555          */
1556         public function doEditSectionLink( Title $nt, $section, $tooltip = null, $lang = false ) {
1557                 // HTML generated here should probably have userlangattributes
1558                 // added to it for LTR text on RTL pages
1559
1560                 $lang = wfGetLangObj( $lang );
1561
1562                 $attribs = [];
1563                 if ( !is_null( $tooltip ) ) {
1564                         # T27462: undo double-escaping.
1565                         $tooltip = Sanitizer::decodeCharReferences( $tooltip );
1566                         $attribs['title'] = wfMessage( 'editsectionhint' )->rawParams( $tooltip )
1567                                 ->inLanguage( $lang )->text();
1568                 }
1569
1570                 $links = [
1571                         'editsection' => [
1572                                 'text' => wfMessage( 'editsection' )->inLanguage( $lang )->escaped(),
1573                                 'targetTitle' => $nt,
1574                                 'attribs' => $attribs,
1575                                 'query' => [ 'action' => 'edit', 'section' => $section ],
1576                                 'options' => [ 'noclasses', 'known' ]
1577                         ]
1578                 ];
1579
1580                 Hooks::run( 'SkinEditSectionLinks', [ $this, $nt, $section, $tooltip, &$links, $lang ] );
1581
1582                 $result = '<span class="mw-editsection"><span class="mw-editsection-bracket">[</span>';
1583
1584                 $linksHtml = [];
1585                 foreach ( $links as $k => $linkDetails ) {
1586                         $linksHtml[] = Linker::link(
1587                                 $linkDetails['targetTitle'],
1588                                 $linkDetails['text'],
1589                                 $linkDetails['attribs'],
1590                                 $linkDetails['query'],
1591                                 $linkDetails['options']
1592                         );
1593                 }
1594
1595                 $result .= implode(
1596                         '<span class="mw-editsection-divider">'
1597                                 . wfMessage( 'pipe-separator' )->inLanguage( $lang )->text()
1598                                 . '</span>',
1599                         $linksHtml
1600                 );
1601
1602                 $result .= '<span class="mw-editsection-bracket">]</span></span>';
1603                 // Deprecated, use SkinEditSectionLinks hook instead
1604                 Hooks::run(
1605                         'DoEditSectionLink',
1606                         [ $this, $nt, $section, $tooltip, &$result, $lang ],
1607                         '1.25'
1608                 );
1609                 return $result;
1610         }
1611
1612 }