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          * @return array Array of modules with helper keys for easy overriding
 153          */
 154         public function getDefaultModules() {
 155                 global $wgUseAjax, $wgEnableAPI, $wgEnableWriteAPI;
 156
 157                 $out = $this->getOutput();
 158                 $user = $out->getUser();
 159                 $modules = [
 160                         // modules that enhance the page content in some way
 161                         'content' => [
 162                                 'mediawiki.page.ready',
 163                         ],
 164                         // modules that exist for legacy reasons
 165                         'legacy' => ResourceLoaderStartUpModule::getLegacyModules(),
 166                         // modules relating to search functionality
 167                         'search' => [],
 168                         // modules relating to functionality relating to watching an article
 169                         'watch' => [],
 170                         // modules which relate to the current users preferences
 171                         'user' => [],
 172                 ];
 173
 174                 // Add various resources if required
 175                 if ( $wgUseAjax && $wgEnableAPI ) {
 176                         if ( $wgEnableWriteAPI && $user->isLoggedIn()
 177                                 && $user->isAllowedAll( 'writeapi', 'viewmywatchlist', 'editmywatchlist' )
 178                                 && $this->getRelevantTitle()->canExist()
 179                         ) {
 180                                 $modules['watch'][] = 'mediawiki.page.watch.ajax';
 181                         }
 182
 183                         $modules['search'][] = 'mediawiki.searchSuggest';
 184                 }
 185
 186                 if ( $user->getBoolOption( 'editsectiononrightclick' ) ) {
 187                         $modules['user'][] = 'mediawiki.action.view.rightClickEdit';
 188                 }
 189
 190                 // Crazy edit-on-double-click stuff
 191                 if ( $out->isArticle() && $user->getOption( 'editondblclick' ) ) {
 192                         $modules['user'][] = 'mediawiki.action.view.dblClickEdit';
 193                 }
 194                 return $modules;
 195         }
 196
 197         /**
 198          * Preload the existence of three commonly-requested pages in a single query
 199          */
 200         protected function preloadExistence() {
 201                 $titles = [];
 202
 203                 // User/talk link
 204                 $user = $this->getUser();
 205                 if ( $user->isLoggedIn() ) {
 206                         $titles[] = $user->getUserPage();
 207                         $titles[] = $user->getTalkPage();
 208                 }
 209
 210                 // Check, if the page can hold some kind of content, otherwise do nothing
 211                 $title = $this->getRelevantTitle();
 212                 if ( $title->canExist() ) {
 213                         if ( $title->isTalkPage() ) {
 214                                 $titles[] = $title->getSubjectPage();
 215                         } else {
 216                                 $titles[] = $title->getTalkPage();
 217                         }
 218                 }
 219
 220                 Hooks::run( 'SkinPreloadExistence', [ &$titles, $this ] );
 221
 222                 if ( $titles ) {
 223                         $lb = new LinkBatch( $titles );
 224                         $lb->setCaller( __METHOD__ );
 225                         $lb->execute();
 226                 }
 227         }
 228
 229         /**
 230          * Get the current revision ID
 231          *
 232          * @return int
 233          */
 234         public function getRevisionId() {
 235                 return $this->getOutput()->getRevisionId();
 236         }
 237
 238         /**
 239          * Whether the revision displayed is the latest revision of the page
 240          *
 241          * @return bool
 242          */
 243         public function isRevisionCurrent() {
 244                 $revID = $this->getRevisionId();
 245                 return $revID == 0 || $revID == $this->getTitle()->getLatestRevID();
 246         }
 247
 248         /**
 249          * Set the "relevant" title
 250          * @see self::getRelevantTitle()
 251          * @param Title $t
 252          */
 253         public function setRelevantTitle( $t ) {
 254                 $this->mRelevantTitle = $t;
 255         }
 256
 257         /**
 258          * Return the "relevant" title.
 259          * A "relevant" title is not necessarily the actual title of the page.
 260          * Special pages like Special:MovePage use set the page they are acting on
 261          * as their "relevant" title, this allows the skin system to display things
 262          * such as content tabs which belong to to that page instead of displaying
 263          * a basic special page tab which has almost no meaning.
 264          *
 265          * @return Title
 266          */
 267         public function getRelevantTitle() {
 268                 if ( isset( $this->mRelevantTitle ) ) {
 269                         return $this->mRelevantTitle;
 270                 }
 271                 return $this->getTitle();
 272         }
 273
 274         /**
 275          * Set the "relevant" user
 276          * @see self::getRelevantUser()
 277          * @param User $u
 278          */
 279         public function setRelevantUser( $u ) {
 280                 $this->mRelevantUser = $u;
 281         }
 282
 283         /**
 284          * Return the "relevant" user.
 285          * A "relevant" user is similar to a relevant title. Special pages like
 286          * Special:Contributions mark the user which they are relevant to so that
 287          * things like the toolbox can display the information they usually are only
 288          * able to display on a user's userpage and talkpage.
 289          * @return User
 290          */
 291         public function getRelevantUser() {
 292                 if ( isset( $this->mRelevantUser ) ) {
 293                         return $this->mRelevantUser;
 294                 }
 295                 $title = $this->getRelevantTitle();
 296                 if ( $title->hasSubjectNamespace( NS_USER ) ) {
 297                         $rootUser = $title->getRootText();
 298                         if ( User::isIP( $rootUser ) ) {
 299                                 $this->mRelevantUser = User::newFromName( $rootUser, false );
 300                         } else {
 301                                 $user = User::newFromName( $rootUser, false );
 302
 303                                 if ( $user ) {
 304                                         $user->load( User::READ_NORMAL );
 305
 306                                         if ( $user->isLoggedIn() ) {
 307                                                 $this->mRelevantUser = $user;
 308                                         }
 309                                 }
 310                         }
 311                         return $this->mRelevantUser;
 312                 }
 313                 return null;
 314         }
 315
 316         /**
 317          * Outputs the HTML generated by other functions.
 318          * @param OutputPage $out
 319          */
 320         abstract function outputPage( OutputPage $out = null );
 321
 322         /**
 323          * @param array $data
 324          * @return string
 325          */
 326         static function makeVariablesScript( $data ) {
 327                 if ( $data ) {
 328                         return ResourceLoader::makeInlineScript(
 329                                 ResourceLoader::makeConfigSetScript( $data )
 330                         );
 331                 } else {
 332                         return '';
 333                 }
 334         }
 335
 336         /**
 337          * Get the query to generate a dynamic stylesheet
 338          *
 339          * @return array
 340          */
 341         public static function getDynamicStylesheetQuery() {
 342                 global $wgSquidMaxage;
 343
 344                 return [
 345                                 'action' => 'raw',
 346                                 'maxage' => $wgSquidMaxage,
 347                                 'usemsgcache' => 'yes',
 348                                 'ctype' => 'text/css',
 349                                 'smaxage' => $wgSquidMaxage,
 350                         ];
 351         }
 352
 353         /**
 354          * Add skin specific stylesheets
 355          * Calling this method with an $out of anything but the same OutputPage
 356          * inside ->getOutput() is deprecated. The $out arg is kept
 357          * for compatibility purposes with skins.
 358          * @param OutputPage $out
 359          * @todo delete
 360          */
 361         abstract function setupSkinUserCss( OutputPage $out );
 362
 363         /**
 364          * TODO: document
 365          * @param Title $title
 366          * @return string
 367          */
 368         function getPageClasses( $title ) {
 369                 $numeric = 'ns-' . $title->getNamespace();
 370
 371                 if ( $title->isSpecialPage() ) {
 372                         $type = 'ns-special';
 373                         // bug 23315: provide a class based on the canonical special page name without subpages
 374                         list( $canonicalName ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );
 375                         if ( $canonicalName ) {
 376                                 $type .= ' ' . Sanitizer::escapeClass( "mw-special-$canonicalName" );
 377                         } else {
 378                                 $type .= ' mw-invalidspecialpage';
 379                         }
 380                 } elseif ( $title->isTalkPage() ) {
 381                         $type = 'ns-talk';
 382                 } else {
 383                         $type = 'ns-subject';
 384                 }
 385
 386                 $name = Sanitizer::escapeClass( 'page-' . $title->getPrefixedText() );
 387                 $root = Sanitizer::escapeClass( 'rootpage-' . $title->getRootTitle()->getPrefixedText() );
 388
 389                 return "$numeric $type $name $root";
 390         }
 391
 392         /**
 393          * Return values for <html> element
 394          * @return array Array of associative name-to-value elements for <html> element
 395          */
 396         public function getHtmlElementAttributes() {
 397                 $lang = $this->getLanguage();
 398                 return [
 399                         'lang' => $lang->getHtmlCode(),
 400                         'dir' => $lang->getDir(),
 401                         'class' => 'client-nojs',
 402                 ];
 403         }
 404
 405         /**
 406          * This will be called by OutputPage::headElement when it is creating the
 407          * "<body>" tag, skins can override it if they have a need to add in any
 408          * body attributes or classes of their own.
 409          * @param OutputPage $out
 410          * @param array $bodyAttrs
 411          */
 412         function addToBodyAttributes( $out, &$bodyAttrs ) {
 413                 // does nothing by default
 414         }
 415
 416         /**
 417          * URL to the logo
 418          * @return string
 419          */
 420         function getLogo() {
 421                 global $wgLogo;
 422                 return $wgLogo;
 423         }
 424
 425         /**
 426          * @return string HTML
 427          */
 428         function getCategoryLinks() {
 429                 global $wgUseCategoryBrowser;
 430
 431                 $out = $this->getOutput();
 432                 $allCats = $out->getCategoryLinks();
 433
 434                 if ( !count( $allCats ) ) {
 435                         return '';
 436                 }
 437
 438                 $embed = "<li>";
 439                 $pop = "</li>";
 440
 441                 $s = '';
 442                 $colon = $this->msg( 'colon-separator' )->escaped();
 443
 444                 if ( !empty( $allCats['normal'] ) ) {
 445                         $t = $embed . implode( "{$pop}{$embed}", $allCats['normal'] ) . $pop;
 446
 447                         $msg = $this->msg( 'pagecategories' )->numParams( count( $allCats['normal'] ) )->escaped();
 448                         $linkPage = wfMessage( 'pagecategorieslink' )->inContentLanguage()->text();
 449                         $title = Title::newFromText( $linkPage );
 450                         $link = $title ? Linker::link( $title, $msg ) : $msg;
 451                         $s .= '<div id="mw-normal-catlinks" class="mw-normal-catlinks">' .
 452                                 $link . $colon . '<ul>' . $t . '</ul>' . '</div>';
 453                 }
 454
 455                 # Hidden categories
 456                 if ( isset( $allCats['hidden'] ) ) {
 457                         if ( $this->getUser()->getBoolOption( 'showhiddencats' ) ) {
 458                                 $class = ' mw-hidden-cats-user-shown';
 459                         } elseif ( $this->getTitle()->getNamespace() == NS_CATEGORY ) {
 460                                 $class = ' mw-hidden-cats-ns-shown';
 461                         } else {
 462                                 $class = ' mw-hidden-cats-hidden';
 463                         }
 464
 465                         $s .= "<div id=\"mw-hidden-catlinks\" class=\"mw-hidden-catlinks$class\">" .
 466                                 $this->msg( 'hidden-categories' )->numParams( count( $allCats['hidden'] ) )->escaped() .
 467                                 $colon . '<ul>' . $embed . implode( "{$pop}{$embed}", $allCats['hidden'] ) . $pop . '</ul>' .
 468                                 '</div>';
 469                 }
 470
 471                 # optional 'dmoz-like' category browser. Will be shown under the list
 472                 # of categories an article belong to
 473                 if ( $wgUseCategoryBrowser ) {
 474                         $s .= '<br /><hr />';
 475
 476                         # get a big array of the parents tree
 477                         $parenttree = $this->getTitle()->getParentCategoryTree();
 478                         # Skin object passed by reference cause it can not be
 479                         # accessed under the method subfunction drawCategoryBrowser
 480                         $tempout = explode( "\n", $this->drawCategoryBrowser( $parenttree ) );
 481                         # Clean out bogus first entry and sort them
 482                         unset( $tempout[0] );
 483                         asort( $tempout );
 484                         # Output one per line
 485                         $s .= implode( "<br />\n", $tempout );
 486                 }
 487
 488                 return $s;
 489         }
 490
 491         /**
 492          * Render the array as a series of links.
 493          * @param array $tree Categories tree returned by Title::getParentCategoryTree
 494          * @return string Separated by &gt;, terminate with "\n"
 495          */
 496         function drawCategoryBrowser( $tree ) {
 497                 $return = '';
 498
 499                 foreach ( $tree as $element => $parent ) {
 500                         if ( empty( $parent ) ) {
 501                                 # element start a new list
 502                                 $return .= "\n";
 503                         } else {
 504                                 # grab the others elements
 505                                 $return .= $this->drawCategoryBrowser( $parent ) . ' &gt; ';
 506                         }
 507
 508                         # add our current element to the list
 509                         $eltitle = Title::newFromText( $element );
 510                         $return .= Linker::link( $eltitle, htmlspecialchars( $eltitle->getText() ) );
 511                 }
 512
 513                 return $return;
 514         }
 515
 516         /**
 517          * @return string HTML
 518          */
 519         function getCategories() {
 520                 $out = $this->getOutput();
 521                 $catlinks = $this->getCategoryLinks();
 522
 523                 // Check what we're showing
 524                 $allCats = $out->getCategoryLinks();
 525                 $showHidden = $this->getUser()->getBoolOption( 'showhiddencats' ) ||
 526                                                 $this->getTitle()->getNamespace() == NS_CATEGORY;
 527
 528                 $classes = [ 'catlinks' ];
 529                 if ( empty( $allCats['normal'] ) && !( !empty( $allCats['hidden'] ) && $showHidden ) ) {
 530                         $classes[] = 'catlinks-allhidden';
 531                 }
 532
 533                 return Html::rawElement(
 534                         'div',
 535                         [ 'id' => 'catlinks', 'class' => $classes, 'data-mw' => 'interface' ],
 536                         $catlinks
 537                 );
 538         }
 539
 540         /**
 541          * This runs a hook to allow extensions placing their stuff after content
 542          * and article metadata (e.g. categories).
 543          * Note: This function has nothing to do with afterContent().
 544          *
 545          * This hook is placed here in order to allow using the same hook for all
 546          * skins, both the SkinTemplate based ones and the older ones, which directly
 547          * use this class to get their data.
 548          *
 549          * The output of this function gets processed in SkinTemplate::outputPage() for
 550          * the SkinTemplate based skins, all other skins should directly echo it.
 551          *
 552          * @return string Empty by default, if not changed by any hook function.
 553          */
 554         protected function afterContentHook() {
 555                 $data = '';
 556
 557                 if ( Hooks::run( 'SkinAfterContent', [ &$data, $this ] ) ) {
 558                         // adding just some spaces shouldn't toggle the output
 559                         // of the whole <div/>, so we use trim() here
 560                         if ( trim( $data ) != '' ) {
 561                                 // Doing this here instead of in the skins to
 562                                 // ensure that the div has the same ID in all
 563                                 // skins
 564                                 $data = "<div id='mw-data-after-content'>\n" .
 565                                         "\t$data\n" .
 566                                         "</div>\n";
 567                         }
 568                 } else {
 569                         wfDebug( "Hook SkinAfterContent changed output processing.\n" );
 570                 }
 571
 572                 return $data;
 573         }
 574
 575         /**
 576          * Generate debug data HTML for displaying at the bottom of the main content
 577          * area.
 578          * @return string HTML containing debug data, if enabled (otherwise empty).
 579          */
 580         protected function generateDebugHTML() {
 581                 return MWDebug::getHTMLDebugLog();
 582         }
 583
 584         /**
 585          * This gets called shortly before the "</body>" tag.
 586          *
 587          * @return string HTML-wrapped JS code to be put before "</body>"
 588          */
 589         function bottomScripts() {
 590                 // TODO and the suckage continues. This function is really just a wrapper around
 591                 // OutputPage::getBottomScripts() which takes a Skin param. This should be cleaned
 592                 // up at some point
 593                 $bottomScriptText = $this->getOutput()->getBottomScripts();
 594                 Hooks::run( 'SkinAfterBottomScripts', [ $this, &$bottomScriptText ] );
 595
 596                 return $bottomScriptText;
 597         }
 598
 599         /**
 600          * Text with the permalink to the source page,
 601          * usually shown on the footer of a printed page
 602          *
 603          * @return string HTML text with an URL
 604          */
 605         function printSource() {
 606                 $oldid = $this->getRevisionId();
 607                 if ( $oldid ) {
 608                         $canonicalUrl = $this->getTitle()->getCanonicalURL( 'oldid=' . $oldid );
 609                         $url = htmlspecialchars( wfExpandIRI( $canonicalUrl ) );
 610                 } else {
 611                         // oldid not available for non existing pages
 612                         $url = htmlspecialchars( wfExpandIRI( $this->getTitle()->getCanonicalURL() ) );
 613                 }
 614
 615                 return $this->msg( 'retrievedfrom' )
 616                         ->rawParams( '<a dir="ltr" href="' . $url . '">' . $url . '</a>' )
 617                         ->parse();
 618         }
 619
 620         /**
 621          * @return string HTML
 622          */
 623         function getUndeleteLink() {
 624                 $action = $this->getRequest()->getVal( 'action', 'view' );
 625
 626                 if ( $this->getTitle()->userCan( 'deletedhistory', $this->getUser() ) &&
 627                         ( !$this->getTitle()->exists() || $action == 'history' ) ) {
 628                         $n = $this->getTitle()->isDeleted();
 629
 630                         if ( $n ) {
 631                                 if ( $this->getTitle()->quickUserCan( 'undelete', $this->getUser() ) ) {
 632                                         $msg = 'thisisdeleted';
 633                                 } else {
 634                                         $msg = 'viewdeleted';
 635                                 }
 636
 637                                 return $this->msg( $msg )->rawParams(
 638                                         Linker::linkKnown(
 639                                                 SpecialPage::getTitleFor( 'Undelete', $this->getTitle()->getPrefixedDBkey() ),
 640                                                 $this->msg( 'restorelink' )->numParams( $n )->escaped() )
 641                                         )->escaped();
 642                         }
 643                 }
 644
 645                 return '';
 646         }
 647
 648         /**
 649          * @param OutputPage $out Defaults to $this->getOutput() if left as null
 650          * @return string
 651          */
 652         function subPageSubtitle( $out = null ) {
 653                 if ( $out === null ) {
 654                         $out = $this->getOutput();
 655                 }
 656                 $title = $out->getTitle();
 657                 $subpages = '';
 658
 659                 if ( !Hooks::run( 'SkinSubPageSubtitle', [ &$subpages, $this, $out ] ) ) {
 660                         return $subpages;
 661                 }
 662
 663                 if ( $out->isArticle() && MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 664                         $ptext = $title->getPrefixedText();
 665                         if ( strpos( $ptext, '/' ) !== false ) {
 666                                 $links = explode( '/', $ptext );
 667                                 array_pop( $links );
 668                                 $c = 0;
 669                                 $growinglink = '';
 670                                 $display = '';
 671                                 $lang = $this->getLanguage();
 672
 673                                 foreach ( $links as $link ) {
 674                                         $growinglink .= $link;
 675                                         $display .= $link;
 676                                         $linkObj = Title::newFromText( $growinglink );
 677
 678                                         if ( is_object( $linkObj ) && $linkObj->isKnown() ) {
 679                                                 $getlink = Linker::linkKnown(
 680                                                         $linkObj,
 681                                                         htmlspecialchars( $display )
 682                                                 );
 683
 684                                                 $c++;
 685
 686                                                 if ( $c > 1 ) {
 687                                                         $subpages .= $lang->getDirMarkEntity() . $this->msg( 'pipe-separator' )->escaped();
 688                                                 } else {
 689                                                         $subpages .= '&lt; ';
 690                                                 }
 691
 692                                                 $subpages .= $getlink;
 693                                                 $display = '';
 694                                         } else {
 695                                                 $display .= '/';
 696                                         }
 697                                         $growinglink .= '/';
 698                                 }
 699                         }
 700                 }
 701
 702                 return $subpages;
 703         }
 704
 705         /**
 706          * @deprecated since 1.27, feature removed
 707          * @return bool Always false
 708          */
 709         function showIPinHeader() {
 710                 wfDeprecated( __METHOD__, '1.27' );
 711                 return false;
 712         }
 713
 714         /**
 715          * @return string
 716          */
 717         function getSearchLink() {
 718                 $searchPage = SpecialPage::getTitleFor( 'Search' );
 719                 return $searchPage->getLocalURL();
 720         }
 721
 722         /**
 723          * @return string
 724          */
 725         function escapeSearchLink() {
 726                 return htmlspecialchars( $this->getSearchLink() );
 727         }
 728
 729         /**
 730          * @param string $type
 731          * @return string
 732          */
 733         function getCopyright( $type = 'detect' ) {
 734                 global $wgRightsPage, $wgRightsUrl, $wgRightsText;
 735
 736                 if ( $type == 'detect' ) {
 737                         if ( !$this->isRevisionCurrent()
 738                                 && !$this->msg( 'history_copyright' )->inContentLanguage()->isDisabled()
 739                         ) {
 740                                 $type = 'history';
 741                         } else {
 742                                 $type = 'normal';
 743                         }
 744                 }
 745
 746                 if ( $type == 'history' ) {
 747                         $msg = 'history_copyright';
 748                 } else {
 749                         $msg = 'copyright';
 750                 }
 751
 752                 if ( $wgRightsPage ) {
 753                         $title = Title::newFromText( $wgRightsPage );
 754                         $link = Linker::linkKnown( $title, $wgRightsText );
 755                 } elseif ( $wgRightsUrl ) {
 756                         $link = Linker::makeExternalLink( $wgRightsUrl, $wgRightsText );
 757                 } elseif ( $wgRightsText ) {
 758                         $link = $wgRightsText;
 759                 } else {
 760                         # Give up now
 761                         return '';
 762                 }
 763
 764                 // Allow for site and per-namespace customization of copyright notice.
 765                 // @todo Remove deprecated $forContent param from hook handlers and then remove here.
 766                 $forContent = true;
 767
 768                 Hooks::run(
 769                         'SkinCopyrightFooter',
 770                         [ $this->getTitle(), $type, &$msg, &$link, &$forContent ]
 771                 );
 772
 773                 return $this->msg( $msg )->rawParams( $link )->text();
 774         }
 775
 776         /**
 777          * @return null|string
 778          */
 779         function getCopyrightIcon() {
 780                 global $wgRightsUrl, $wgRightsText, $wgRightsIcon, $wgFooterIcons;
 781
 782                 $out = '';
 783
 784                 if ( $wgFooterIcons['copyright']['copyright'] ) {
 785                         $out = $wgFooterIcons['copyright']['copyright'];
 786                 } elseif ( $wgRightsIcon ) {
 787                         $icon = htmlspecialchars( $wgRightsIcon );
 788
 789                         if ( $wgRightsUrl ) {
 790                                 $url = htmlspecialchars( $wgRightsUrl );
 791                                 $out .= '<a href="' . $url . '">';
 792                         }
 793
 794                         $text = htmlspecialchars( $wgRightsText );
 795                         $out .= "<img src=\"$icon\" alt=\"$text\" width=\"88\" height=\"31\" />";
 796
 797                         if ( $wgRightsUrl ) {
 798                                 $out .= '</a>';
 799                         }
 800                 }
 801
 802                 return $out;
 803         }
 804
 805         /**
 806          * Gets the powered by MediaWiki icon.
 807          * @return string
 808          */
 809         function getPoweredBy() {
 810                 global $wgResourceBasePath;
 811
 812                 $url1 = htmlspecialchars(
 813                         "$wgResourceBasePath/resources/assets/poweredby_mediawiki_88x31.png"
 814                 );
 815                 $url1_5 = htmlspecialchars(
 816                         "$wgResourceBasePath/resources/assets/poweredby_mediawiki_132x47.png"
 817                 );
 818                 $url2 = htmlspecialchars(
 819                         "$wgResourceBasePath/resources/assets/poweredby_mediawiki_176x62.png"
 820                 );
 821                 $text = '<a href="//www.mediawiki.org/"><img src="' . $url1
 822                         . '" srcset="' . $url1_5 . ' 1.5x, ' . $url2 . ' 2x" '
 823                         . 'height="31" width="88" alt="Powered by MediaWiki" /></a>';
 824                 Hooks::run( 'SkinGetPoweredBy', [ &$text, $this ] );
 825                 return $text;
 826         }
 827
 828         /**
 829          * Get the timestamp of the latest revision, formatted in user language
 830          *
 831          * @return string
 832          */
 833         protected function lastModified() {
 834                 $timestamp = $this->getOutput()->getRevisionTimestamp();
 835
 836                 # No cached timestamp, load it from the database
 837                 if ( $timestamp === null ) {
 838                         $timestamp = Revision::getTimestampFromId( $this->getTitle(), $this->getRevisionId() );
 839                 }
 840
 841                 if ( $timestamp ) {
 842                         $d = $this->getLanguage()->userDate( $timestamp, $this->getUser() );
 843                         $t = $this->getLanguage()->userTime( $timestamp, $this->getUser() );
 844                         $s = ' ' . $this->msg( 'lastmodifiedat', $d, $t )->parse();
 845                 } else {
 846                         $s = '';
 847                 }
 848
 849                 if ( wfGetLB()->getLaggedReplicaMode() ) {
 850                         $s .= ' <strong>' . $this->msg( 'laggedslavemode' )->parse() . '</strong>';
 851                 }
 852
 853                 return $s;
 854         }
 855
 856         /**
 857          * @param string $align
 858          * @return string
 859          */
 860         function logoText( $align = '' ) {
 861                 if ( $align != '' ) {
 862                         $a = " style='float: {$align};'";
 863                 } else {
 864                         $a = '';
 865                 }
 866
 867                 $mp = $this->msg( 'mainpage' )->escaped();
 868                 $mptitle = Title::newMainPage();
 869                 $url = ( is_object( $mptitle ) ? htmlspecialchars( $mptitle->getLocalURL() ) : '' );
 870
 871                 $logourl = $this->getLogo();
 872                 $s = "<a href='{$url}'><img{$a} src='{$logourl}' alt='[{$mp}]' /></a>";
 873
 874                 return $s;
 875         }
 876
 877         /**
 878          * Renders a $wgFooterIcons icon according to the method's arguments
 879          * @param array $icon The icon to build the html for, see $wgFooterIcons
 880          *   for the format of this array.
 881          * @param bool|string $withImage Whether to use the icon's image or output
 882          *   a text-only footericon.
 883          * @return string HTML
 884          */
 885         function makeFooterIcon( $icon, $withImage = 'withImage' ) {
 886                 if ( is_string( $icon ) ) {
 887                         $html = $icon;
 888                 } else { // Assuming array
 889                         $url = isset( $icon["url"] ) ? $icon["url"] : null;
 890                         unset( $icon["url"] );
 891                         if ( isset( $icon["src"] ) && $withImage === 'withImage' ) {
 892                                 // do this the lazy way, just pass icon data as an attribute array
 893                                 $html = Html::element( 'img', $icon );
 894                         } else {
 895                                 $html = htmlspecialchars( $icon["alt"] );
 896                         }
 897                         if ( $url ) {
 898                                 $html = Html::rawElement( 'a', [ "href" => $url ], $html );
 899                         }
 900                 }
 901                 return $html;
 902         }
 903
 904         /**
 905          * Gets the link to the wiki's main page.
 906          * @return string
 907          */
 908         function mainPageLink() {
 909                 $s = Linker::linkKnown(
 910                         Title::newMainPage(),
 911                         $this->msg( 'mainpage' )->escaped()
 912                 );
 913
 914                 return $s;
 915         }
 916
 917         /**
 918          * Returns an HTML link for use in the footer
 919          * @param string $desc The i18n message key for the link text
 920          * @param string $page The i18n message key for the page to link to
 921          * @return string HTML anchor
 922          */
 923         public function footerLink( $desc, $page ) {
 924                 // if the link description has been set to "-" in the default language,
 925                 if ( $this->msg( $desc )->inContentLanguage()->isDisabled() ) {
 926                         // then it is disabled, for all languages.
 927                         return '';
 928                 } else {
 929                         // Otherwise, we display the link for the user, described in their
 930                         // language (which may or may not be the same as the default language),
 931                         // but we make the link target be the one site-wide page.
 932                         $title = Title::newFromText( $this->msg( $page )->inContentLanguage()->text() );
 933
 934                         if ( !$title ) {
 935                                 return '';
 936                         }
 937
 938                         return Linker::linkKnown(
 939                                 $title,
 940                                 $this->msg( $desc )->escaped()
 941                         );
 942                 }
 943         }
 944
 945         /**
 946          * Gets the link to the wiki's privacy policy page.
 947          * @return string HTML
 948          */
 949         function privacyLink() {
 950                 return $this->footerLink( 'privacy', 'privacypage' );
 951         }
 952
 953         /**
 954          * Gets the link to the wiki's about page.
 955          * @return string HTML
 956          */
 957         function aboutLink() {
 958                 return $this->footerLink( 'aboutsite', 'aboutpage' );
 959         }
 960
 961         /**
 962          * Gets the link to the wiki's general disclaimers page.
 963          * @return string HTML
 964          */
 965         function disclaimerLink() {
 966                 return $this->footerLink( 'disclaimers', 'disclaimerpage' );
 967         }
 968
 969         /**
 970          * Return URL options for the 'edit page' link.
 971          * This may include an 'oldid' specifier, if the current page view is such.
 972          *
 973          * @return array
 974          * @private
 975          */
 976         function editUrlOptions() {
 977                 $options = [ 'action' => 'edit' ];
 978
 979                 if ( !$this->isRevisionCurrent() ) {
 980                         $options['oldid'] = intval( $this->getRevisionId() );
 981                 }
 982
 983                 return $options;
 984         }
 985
 986         /**
 987          * @param User|int $id
 988          * @return bool
 989          */
 990         function showEmailUser( $id ) {
 991                 if ( $id instanceof User ) {
 992                         $targetUser = $id;
 993                 } else {
 994                         $targetUser = User::newFromId( $id );
 995                 }
 996
 997                 # The sending user must have a confirmed email address and the target
 998                 # user must have a confirmed email address and allow emails from users.
 999                 return $this->getUser()->canSendEmail() &&
1000                         $targetUser->canReceiveEmail();
1001         }
1002
1003         /**
1004          * Return a fully resolved style path url to images or styles stored in the current skins's folder.
1005          * This method returns a url resolved using the configured skin style path
1006          * and includes the style version inside of the url.
1007          *
1008          * Requires $stylename to be set, otherwise throws MWException.
1009          *
1010          * @param string $name The name or path of a skin resource file
1011          * @return string The fully resolved style path url including styleversion
1012          * @throws MWException
1013          */
1014         function getSkinStylePath( $name ) {
1015                 global $wgStylePath, $wgStyleVersion;
1016
1017                 if ( $this->stylename === null ) {
1018                         $class = get_class( $this );
1019                         throw new MWException( "$class::\$stylename must be set to use getSkinStylePath()" );
1020                 }
1021
1022                 return "$wgStylePath/{$this->stylename}/$name?$wgStyleVersion";
1023         }
1024
1025         /* these are used extensively in SkinTemplate, but also some other places */
1026
1027         /**
1028          * @param string $urlaction
1029          * @return string
1030          */
1031         static function makeMainPageUrl( $urlaction = '' ) {
1032                 $title = Title::newMainPage();
1033                 self::checkTitle( $title, '' );
1034
1035                 return $title->getLocalURL( $urlaction );
1036         }
1037
1038         /**
1039          * Make a URL for a Special Page using the given query and protocol.
1040          *
1041          * If $proto is set to null, make a local URL. Otherwise, make a full
1042          * URL with the protocol specified.
1043          *
1044          * @param string $name Name of the Special page
1045          * @param string $urlaction Query to append
1046          * @param string|null $proto Protocol to use or null for a local URL
1047          * @return string
1048          */
1049         static function makeSpecialUrl( $name, $urlaction = '', $proto = null ) {
1050                 $title = SpecialPage::getSafeTitleFor( $name );
1051                 if ( is_null( $proto ) ) {
1052                         return $title->getLocalURL( $urlaction );
1053                 } else {
1054                         return $title->getFullURL( $urlaction, false, $proto );
1055                 }
1056         }
1057
1058         /**
1059          * @param string $name
1060          * @param string $subpage
1061          * @param string $urlaction
1062          * @return string
1063          */
1064         static function makeSpecialUrlSubpage( $name, $subpage, $urlaction = '' ) {
1065                 $title = SpecialPage::getSafeTitleFor( $name, $subpage );
1066                 return $title->getLocalURL( $urlaction );
1067         }
1068
1069         /**
1070          * @param string $name
1071          * @param string $urlaction
1072          * @return string
1073          */
1074         static function makeI18nUrl( $name, $urlaction = '' ) {
1075                 $title = Title::newFromText( wfMessage( $name )->inContentLanguage()->text() );
1076                 self::checkTitle( $title, $name );
1077                 return $title->getLocalURL( $urlaction );
1078         }
1079
1080         /**
1081          * @param string $name
1082          * @param string $urlaction
1083          * @return string
1084          */
1085         static function makeUrl( $name, $urlaction = '' ) {
1086                 $title = Title::newFromText( $name );
1087                 self::checkTitle( $title, $name );
1088
1089                 return $title->getLocalURL( $urlaction );
1090         }
1091
1092         /**
1093          * If url string starts with http, consider as external URL, else
1094          * internal
1095          * @param string $name
1096          * @return string URL
1097          */
1098         static function makeInternalOrExternalUrl( $name ) {
1099                 if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $name ) ) {
1100                         return $name;
1101                 } else {
1102                         return self::makeUrl( $name );
1103                 }
1104         }
1105
1106         /**
1107          * this can be passed the NS number as defined in Language.php
1108          * @param string $name
1109          * @param string $urlaction
1110          * @param int $namespace
1111          * @return string
1112          */
1113         static function makeNSUrl( $name, $urlaction = '', $namespace = NS_MAIN ) {
1114                 $title = Title::makeTitleSafe( $namespace, $name );
1115                 self::checkTitle( $title, $name );
1116
1117                 return $title->getLocalURL( $urlaction );
1118         }
1119
1120         /**
1121          * these return an array with the 'href' and boolean 'exists'
1122          * @param string $name
1123          * @param string $urlaction
1124          * @return array
1125          */
1126         static function makeUrlDetails( $name, $urlaction = '' ) {
1127                 $title = Title::newFromText( $name );
1128                 self::checkTitle( $title, $name );
1129
1130                 return [
1131                         'href' => $title->getLocalURL( $urlaction ),
1132                         'exists' => $title->isKnown(),
1133                 ];
1134         }
1135
1136         /**
1137          * Make URL details where the article exists (or at least it's convenient to think so)
1138          * @param string $name Article name
1139          * @param string $urlaction
1140          * @return array
1141          */
1142         static function makeKnownUrlDetails( $name, $urlaction = '' ) {
1143                 $title = Title::newFromText( $name );
1144                 self::checkTitle( $title, $name );
1145
1146                 return [
1147                         'href' => $title->getLocalURL( $urlaction ),
1148                         'exists' => true
1149                 ];
1150         }
1151
1152         /**
1153          * make sure we have some title to operate on
1154          *
1155          * @param Title $title
1156          * @param string $name
1157          */
1158         static function checkTitle( &$title, $name ) {
1159                 if ( !is_object( $title ) ) {
1160                         $title = Title::newFromText( $name );
1161                         if ( !is_object( $title ) ) {
1162                                 $title = Title::newFromText( '--error: link target missing--' );
1163                         }
1164                 }
1165         }
1166
1167         /**
1168          * Build an array that represents the sidebar(s), the navigation bar among them.
1169          *
1170          * BaseTemplate::getSidebar can be used to simplify the format and id generation in new skins.
1171          *
1172          * The format of the returned array is [ heading => content, ... ], where:
1173          * - heading is the heading of a navigation portlet. It is either:
1174          *   - magic string to be handled by the skins ('SEARCH' / 'LANGUAGES' / 'TOOLBOX' / ...)
1175          *   - a message name (e.g. 'navigation'), the message should be HTML-escaped by the skin
1176          *   - plain text, which should be HTML-escaped by the skin
1177          * - content is the contents of the portlet. It is either:
1178          *   - HTML text (<ul><li>...</li>...</ul>)
1179          *   - array of link data in a format accepted by BaseTemplate::makeListItem()
1180          *   - (for a magic string as a key, any value)
1181          *
1182          * Note that extensions can control the sidebar contents using the SkinBuildSidebar hook
1183          * and can technically insert anything in here; skin creators are expected to handle
1184          * values described above.
1185          *
1186          * @return array
1187          */
1188         function buildSidebar() {
1189                 global $wgEnableSidebarCache, $wgSidebarCacheExpiry;
1190
1191                 $that = $this;
1192                 $callback = function () use ( $that ) {
1193                         $bar = [];
1194                         $that->addToSidebar( $bar, 'sidebar' );
1195                         Hooks::run( 'SkinBuildSidebar', [ $that, &$bar ] );
1196
1197                         return $bar;
1198                 };
1199
1200                 if ( $wgEnableSidebarCache ) {
1201                         $cache = ObjectCache::getMainWANInstance();
1202                         $sidebar = $cache->getWithSetCallback(
1203                                 $cache->makeKey( 'sidebar', $this->getLanguage()->getCode() ),
1204                                 MessageCache::singleton()->isDisabled()
1205                                         ? $cache::TTL_UNCACHEABLE // bug T133069
1206                                         : $wgSidebarCacheExpiry,
1207                                 $callback,
1208                                 [ 'lockTSE' => 30 ]
1209                         );
1210                 } else {
1211                         $sidebar = $callback();
1212                 }
1213
1214                 // Apply post-processing to the cached value
1215                 Hooks::run( 'SidebarBeforeOutput', [ $this, &$sidebar ] );
1216
1217                 return $sidebar;
1218         }
1219
1220         /**
1221          * Add content from a sidebar system message
1222          * Currently only used for MediaWiki:Sidebar (but may be used by Extensions)
1223          *
1224          * This is just a wrapper around addToSidebarPlain() for backwards compatibility
1225          *
1226          * @param array $bar
1227          * @param string $message
1228          */
1229         public function addToSidebar( &$bar, $message ) {
1230                 $this->addToSidebarPlain( $bar, wfMessage( $message )->inContentLanguage()->plain() );
1231         }
1232
1233         /**
1234          * Add content from plain text
1235          * @since 1.17
1236          * @param array $bar
1237          * @param string $text
1238          * @return array
1239          */
1240         function addToSidebarPlain( &$bar, $text ) {
1241                 $lines = explode( "\n", $text );
1242
1243                 $heading = '';
1244                 $messageTitle = $this->getConfig()->get( 'EnableSidebarCache' )
1245                         ? Title::newMainPage() : $this->getTitle();
1246
1247                 foreach ( $lines as $line ) {
1248                         if ( strpos( $line, '*' ) !== 0 ) {
1249                                 continue;
1250                         }
1251                         $line = rtrim( $line, "\r" ); // for Windows compat
1252
1253                         if ( strpos( $line, '**' ) !== 0 ) {
1254                                 $heading = trim( $line, '* ' );
1255                                 if ( !array_key_exists( $heading, $bar ) ) {
1256                                         $bar[$heading] = [];
1257                                 }
1258                         } else {
1259                                 $line = trim( $line, '* ' );
1260
1261                                 if ( strpos( $line, '|' ) !== false ) { // sanity check
1262                                         $line = MessageCache::singleton()->transform( $line, false, null, $messageTitle );
1263                                         $line = array_map( 'trim', explode( '|', $line, 2 ) );
1264                                         if ( count( $line ) !== 2 ) {
1265                                                 // Second sanity check, could be hit by people doing
1266                                                 // funky stuff with parserfuncs... (bug 33321)
1267                                                 continue;
1268                                         }
1269
1270                                         $extraAttribs = [];
1271
1272                                         $msgLink = $this->msg( $line[0] )->title( $messageTitle )->inContentLanguage();
1273                                         if ( $msgLink->exists() ) {
1274                                                 $link = $msgLink->text();
1275                                                 if ( $link == '-' ) {
1276                                                         continue;
1277                                                 }
1278                                         } else {
1279                                                 $link = $line[0];
1280                                         }
1281                                         $msgText = $this->msg( $line[1] )->title( $messageTitle );
1282                                         if ( $msgText->exists() ) {
1283                                                 $text = $msgText->text();
1284                                         } else {
1285                                                 $text = $line[1];
1286                                         }
1287
1288                                         if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $link ) ) {
1289                                                 $href = $link;
1290
1291                                                 // Parser::getExternalLinkAttribs won't work here because of the Namespace things
1292                                                 global $wgNoFollowLinks, $wgNoFollowDomainExceptions;
1293                                                 if ( $wgNoFollowLinks && !wfMatchesDomainList( $href, $wgNoFollowDomainExceptions ) ) {
1294                                                         $extraAttribs['rel'] = 'nofollow';
1295                                                 }
1296
1297                                                 global $wgExternalLinkTarget;
1298                                                 if ( $wgExternalLinkTarget ) {
1299                                                         $extraAttribs['target'] = $wgExternalLinkTarget;
1300                                                 }
1301                                         } else {
1302                                                 $title = Title::newFromText( $link );
1303
1304                                                 if ( $title ) {
1305                                                         $title = $title->fixSpecialName();
1306                                                         $href = $title->getLinkURL();
1307                                                 } else {
1308                                                         $href = 'INVALID-TITLE';
1309                                                 }
1310                                         }
1311
1312                                         $bar[$heading][] = array_merge( [
1313                                                 'text' => $text,
1314                                                 'href' => $href,
1315                                                 'id' => 'n-' . Sanitizer::escapeId( strtr( $line[1], ' ', '-' ), 'noninitial' ),
1316                                                 'active' => false
1317                                         ], $extraAttribs );
1318                                 } else {
1319                                         continue;
1320                                 }
1321                         }
1322                 }
1323
1324                 return $bar;
1325         }
1326
1327         /**
1328          * Gets new talk page messages for the current user and returns an
1329          * appropriate alert message (or an empty string if there are no messages)
1330          * @return string
1331          */
1332         function getNewtalks() {
1333
1334                 $newMessagesAlert = '';
1335                 $user = $this->getUser();
1336                 $newtalks = $user->getNewMessageLinks();
1337                 $out = $this->getOutput();
1338
1339                 // Allow extensions to disable or modify the new messages alert
1340                 if ( !Hooks::run( 'GetNewMessagesAlert', [ &$newMessagesAlert, $newtalks, $user, $out ] ) ) {
1341                         return '';
1342                 }
1343                 if ( $newMessagesAlert ) {
1344                         return $newMessagesAlert;
1345                 }
1346
1347                 if ( count( $newtalks ) == 1 && $newtalks[0]['wiki'] === wfWikiID() ) {
1348                         $uTalkTitle = $user->getTalkPage();
1349                         $lastSeenRev = isset( $newtalks[0]['rev'] ) ? $newtalks[0]['rev'] : null;
1350                         $nofAuthors = 0;
1351                         if ( $lastSeenRev !== null ) {
1352                                 $plural = true; // Default if we have a last seen revision: if unknown, use plural
1353                                 $latestRev = Revision::newFromTitle( $uTalkTitle, false, Revision::READ_NORMAL );
1354                                 if ( $latestRev !== null ) {
1355                                         // Singular if only 1 unseen revision, plural if several unseen revisions.
1356                                         $plural = $latestRev->getParentId() !== $lastSeenRev->getId();
1357                                         $nofAuthors = $uTalkTitle->countAuthorsBetween(
1358                                                 $lastSeenRev, $latestRev, 10, 'include_new' );
1359                                 }
1360                         } else {
1361                                 // Singular if no revision -> diff link will show latest change only in any case
1362                                 $plural = false;
1363                         }
1364                         $plural = $plural ? 999 : 1;
1365                         // 999 signifies "more than one revision". We don't know how many, and even if we did,
1366                         // the number of revisions or authors is not necessarily the same as the number of
1367                         // "messages".
1368                         $newMessagesLink = Linker::linkKnown(
1369                                 $uTalkTitle,
1370                                 $this->msg( 'newmessageslinkplural' )->params( $plural )->escaped(),
1371                                 [],
1372                                 [ 'redirect' => 'no' ]
1373                         );
1374
1375                         $newMessagesDiffLink = Linker::linkKnown(
1376                                 $uTalkTitle,
1377                                 $this->msg( 'newmessagesdifflinkplural' )->params( $plural )->escaped(),
1378                                 [],
1379                                 $lastSeenRev !== null
1380                                         ? [ 'oldid' => $lastSeenRev->getId(), 'diff' => 'cur' ]
1381                                         : [ 'diff' => 'cur' ]
1382                         );
1383
1384                         if ( $nofAuthors >= 1 && $nofAuthors <= 10 ) {
1385                                 $newMessagesAlert = $this->msg(
1386                                         'youhavenewmessagesfromusers',
1387                                         $newMessagesLink,
1388                                         $newMessagesDiffLink
1389                                 )->numParams( $nofAuthors, $plural );
1390                         } else {
1391                                 // $nofAuthors === 11 signifies "11 or more" ("more than 10")
1392                                 $newMessagesAlert = $this->msg(
1393                                         $nofAuthors > 10 ? 'youhavenewmessagesmanyusers' : 'youhavenewmessages',
1394                                         $newMessagesLink,
1395                                         $newMessagesDiffLink
1396                                 )->numParams( $plural );
1397                         }
1398                         $newMessagesAlert = $newMessagesAlert->text();
1399                         # Disable CDN cache
1400                         $out->setCdnMaxage( 0 );
1401                 } elseif ( count( $newtalks ) ) {
1402                         $sep = $this->msg( 'newtalkseparator' )->escaped();
1403                         $msgs = [];
1404
1405                         foreach ( $newtalks as $newtalk ) {
1406                                 $msgs[] = Xml::element(
1407                                         'a',
1408                                         [ 'href' => $newtalk['link'] ], $newtalk['wiki']
1409                                 );
1410                         }
1411                         $parts = implode( $sep, $msgs );
1412                         $newMessagesAlert = $this->msg( 'youhavenewmessagesmulti' )->rawParams( $parts )->escaped();
1413                         $out->setCdnMaxage( 0 );
1414                 }
1415
1416                 return $newMessagesAlert;
1417         }
1418
1419         /**
1420          * Get a cached notice
1421          *
1422          * @param string $name Message name, or 'default' for $wgSiteNotice
1423          * @return string|bool HTML fragment, or false to indicate that the caller
1424          *   should fall back to the next notice in its sequence
1425          */
1426         private function getCachedNotice( $name ) {
1427                 global $wgRenderHashAppend, $parserMemc, $wgContLang;
1428
1429                 $needParse = false;
1430
1431                 if ( $name === 'default' ) {
1432                         // special case
1433                         global $wgSiteNotice;
1434                         $notice = $wgSiteNotice;
1435                         if ( empty( $notice ) ) {
1436                                 return false;
1437                         }
1438                 } else {
1439                         $msg = $this->msg( $name )->inContentLanguage();
1440                         if ( $msg->isBlank() ) {
1441                                 return '';
1442                         } elseif ( $msg->isDisabled() ) {
1443                                 return false;
1444                         }
1445                         $notice = $msg->plain();
1446                 }
1447
1448                 // Use the extra hash appender to let eg SSL variants separately cache.
1449                 $key = wfMemcKey( $name . $wgRenderHashAppend );
1450                 $cachedNotice = $parserMemc->get( $key );
1451                 if ( is_array( $cachedNotice ) ) {
1452                         if ( md5( $notice ) == $cachedNotice['hash'] ) {
1453                                 $notice = $cachedNotice['html'];
1454                         } else {
1455                                 $needParse = true;
1456                         }
1457                 } else {
1458                         $needParse = true;
1459                 }
1460
1461                 if ( $needParse ) {
1462                         $parsed = $this->getOutput()->parse( $notice );
1463                         $parserMemc->set( $key, [ 'html' => $parsed, 'hash' => md5( $notice ) ], 600 );
1464                         $notice = $parsed;
1465                 }
1466
1467                 $notice = Html::rawElement( 'div', [ 'id' => 'localNotice',
1468                         'lang' => $wgContLang->getHtmlCode(), 'dir' => $wgContLang->getDir() ], $notice );
1469                 return $notice;
1470         }
1471
1472         /**
1473          * Get the site notice
1474          *
1475          * @return string HTML fragment
1476          */
1477         function getSiteNotice() {
1478                 $siteNotice = '';
1479
1480                 if ( Hooks::run( 'SiteNoticeBefore', [ &$siteNotice, $this ] ) ) {
1481                         if ( is_object( $this->getUser() ) && $this->getUser()->isLoggedIn() ) {
1482                                 $siteNotice = $this->getCachedNotice( 'sitenotice' );
1483                         } else {
1484                                 $anonNotice = $this->getCachedNotice( 'anonnotice' );
1485                                 if ( $anonNotice === false ) {
1486                                         $siteNotice = $this->getCachedNotice( 'sitenotice' );
1487                                 } else {
1488                                         $siteNotice = $anonNotice;
1489                                 }
1490                         }
1491                         if ( $siteNotice === false ) {
1492                                 $siteNotice = $this->getCachedNotice( 'default' );
1493                         }
1494                 }
1495
1496                 Hooks::run( 'SiteNoticeAfter', [ &$siteNotice, $this ] );
1497                 return $siteNotice;
1498         }
1499
1500         /**
1501          * Create a section edit link.  This supersedes editSectionLink() and
1502          * editSectionLinkForOther().
1503          *
1504          * @param Title $nt The title being linked to (may not be the same as
1505          *   the current page, if the section is included from a template)
1506          * @param string $section The designation of the section being pointed to,
1507          *   to be included in the link, like "&section=$section"
1508          * @param string $tooltip The tooltip to use for the link: will be escaped
1509          *   and wrapped in the 'editsectionhint' message
1510          * @param string $lang Language code
1511          * @return string HTML to use for edit link
1512          */
1513         public function doEditSectionLink( Title $nt, $section, $tooltip = null, $lang = false ) {
1514                 // HTML generated here should probably have userlangattributes
1515                 // added to it for LTR text on RTL pages
1516
1517                 $lang = wfGetLangObj( $lang );
1518
1519                 $attribs = [];
1520                 if ( !is_null( $tooltip ) ) {
1521                         # Bug 25462: undo double-escaping.
1522                         $tooltip = Sanitizer::decodeCharReferences( $tooltip );
1523                         $attribs['title'] = wfMessage( 'editsectionhint' )->rawParams( $tooltip )
1524                                 ->inLanguage( $lang )->text();
1525                 }
1526
1527                 $links = [
1528                         'editsection' => [
1529                                 'text' => wfMessage( 'editsection' )->inLanguage( $lang )->escaped(),
1530                                 'targetTitle' => $nt,
1531                                 'attribs' => $attribs,
1532                                 'query' => [ 'action' => 'edit', 'section' => $section ],
1533                                 'options' => [ 'noclasses', 'known' ]
1534                         ]
1535                 ];
1536
1537                 Hooks::run( 'SkinEditSectionLinks', [ $this, $nt, $section, $tooltip, &$links, $lang ] );
1538
1539                 $result = '<span class="mw-editsection"><span class="mw-editsection-bracket">[</span>';
1540
1541                 $linksHtml = [];
1542                 foreach ( $links as $k => $linkDetails ) {
1543                         $linksHtml[] = Linker::link(
1544                                 $linkDetails['targetTitle'],
1545                                 $linkDetails['text'],
1546                                 $linkDetails['attribs'],
1547                                 $linkDetails['query'],
1548                                 $linkDetails['options']
1549                         );
1550                 }
1551
1552                 $result .= implode(
1553                         '<span class="mw-editsection-divider">'
1554                                 . wfMessage( 'pipe-separator' )->inLanguage( $lang )->text()
1555                                 . '</span>',
1556                         $linksHtml
1557                 );
1558
1559                 $result .= '<span class="mw-editsection-bracket">]</span></span>';
1560                 // Deprecated, use SkinEditSectionLinks hook instead
1561                 Hooks::run(
1562                         'DoEditSectionLink',
1563                         [ $this, $nt, $section, $tooltip, &$result, $lang ],
1564                         '1.25'
1565                 );
1566                 return $result;
1567         }
1568
1569 }