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 use MediaWiki\MediaWikiServices;
  24 use Wikimedia\WrappedString;
  25 use Wikimedia\WrappedStringList;
  26
  27 /**
  28  * @defgroup Skins Skins
  29  */
  30
  31 /**
  32  * The main skin class which provides methods and properties for all other skins.
  33  *
  34  * See docs/skin.txt for more information.
  35  *
  36  * @ingroup Skins
  37  */
  38 abstract class Skin extends ContextSource {
  39         /**
  40          * @var string|null
  41          */
  42         protected $skinname = null;
  43
  44         protected $mRelevantTitle = null;
  45         protected $mRelevantUser = null;
  46
  47         /**
  48          * @var string Stylesheets set to use. Subdirectory in skins/ where various stylesheets are
  49          *   located. Only needs to be set if you intend to use the getSkinStylePath() method.
  50          */
  51         public $stylename = null;
  52
  53         /**
  54          * Fetch the set of available skins.
  55          * @return array Associative array of strings
  56          */
  57         static function getSkinNames() {
  58                 return SkinFactory::getDefaultInstance()->getSkinNames();
  59         }
  60
  61         /**
  62          * Fetch the skinname messages for available skins.
  63          * @return string[]
  64          */
  65         static function getSkinNameMessages() {
  66                 $messages = [];
  67                 foreach ( self::getSkinNames() as $skinKey => $skinName ) {
  68                         $messages[] = "skinname-$skinKey";
  69                 }
  70                 return $messages;
  71         }
  72
  73         /**
  74          * Fetch the list of user-selectable skins in regards to $wgSkipSkins.
  75          * Useful for Special:Preferences and other places where you
  76          * only want to show skins users _can_ use.
  77          * @return string[]
  78          * @since 1.23
  79          */
  80         public static function getAllowedSkins() {
  81                 global $wgSkipSkins;
  82
  83                 $allowedSkins = self::getSkinNames();
  84
  85                 foreach ( $wgSkipSkins as $skip ) {
  86                         unset( $allowedSkins[$skip] );
  87                 }
  88
  89                 return $allowedSkins;
  90         }
  91
  92         /**
  93          * Normalize a skin preference value to a form that can be loaded.
  94          *
  95          * If a skin can't be found, it will fall back to the configured default ($wgDefaultSkin), or the
  96          * hardcoded default ($wgFallbackSkin) if the default skin is unavailable too.
  97          *
  98          * @param string $key 'monobook', 'vector', etc.
  99          * @return string
 100          */
 101         static function normalizeKey( $key ) {
 102                 global $wgDefaultSkin, $wgFallbackSkin;
 103
 104                 $skinNames = self::getSkinNames();
 105
 106                 // Make keys lowercase for case-insensitive matching.
 107                 $skinNames = array_change_key_case( $skinNames, CASE_LOWER );
 108                 $key = strtolower( $key );
 109                 $defaultSkin = strtolower( $wgDefaultSkin );
 110                 $fallbackSkin = strtolower( $wgFallbackSkin );
 111
 112                 if ( $key == '' || $key == 'default' ) {
 113                         // Don't return the default immediately;
 114                         // in a misconfiguration we need to fall back.
 115                         $key = $defaultSkin;
 116                 }
 117
 118                 if ( isset( $skinNames[$key] ) ) {
 119                         return $key;
 120                 }
 121
 122                 // Older versions of the software used a numeric setting
 123                 // in the user preferences.
 124                 $fallback = [
 125                         0 => $defaultSkin,
 126                         2 => 'cologneblue'
 127                 ];
 128
 129                 if ( isset( $fallback[$key] ) ) {
 130                         $key = $fallback[$key];
 131                 }
 132
 133                 if ( isset( $skinNames[$key] ) ) {
 134                         return $key;
 135                 } elseif ( isset( $skinNames[$defaultSkin] ) ) {
 136                         return $defaultSkin;
 137                 } else {
 138                         return $fallbackSkin;
 139                 }
 140         }
 141
 142         /**
 143          * @since 1.31
 144          * @param string|null $skinname
 145          */
 146         public function __construct( $skinname = null ) {
 147                 if ( is_string( $skinname ) ) {
 148                         $this->skinname = $skinname;
 149                 }
 150         }
 151
 152         /**
 153          * @return string|null Skin name
 154          */
 155         public function getSkinName() {
 156                 return $this->skinname;
 157         }
 158
 159         /**
 160          * @param OutputPage $out
 161          */
 162         public function initPage( OutputPage $out ) {
 163                 $this->preloadExistence();
 164         }
 165
 166         /**
 167          * Defines the ResourceLoader modules that should be added to the skin
 168          * It is recommended that skins wishing to override call parent::getDefaultModules()
 169          * and substitute out any modules they wish to change by using a key to look them up
 170          *
 171          * Any modules defined with the 'styles' key will be added as render blocking CSS via
 172          * Output::addModuleStyles. Similarly, each key should refer to a list of modules
 173          *
 174          * @return array Array of modules with helper keys for easy overriding
 175          */
 176         public function getDefaultModules() {
 177                 $out = $this->getOutput();
 178                 $config = $this->getConfig();
 179                 $user = $this->getUser();
 180
 181                 // Modules declared in the $modules literal are loaded
 182                 // for ALL users, on ALL pages, in ALL skins.
 183                 // Keep this list as small as possible!
 184                 $modules = [
 185                         'styles' => [
 186                                 // The 'styles' key sets render-blocking style modules
 187                                 // Unlike other keys in $modules, this is an associative array
 188                                 // where each key is its own group pointing to a list of modules
 189                                 'core' => [
 190                                         'mediawiki.legacy.shared',
 191                                         'mediawiki.legacy.commonPrint',
 192                                 ],
 193                                 'content' => [],
 194                                 'syndicate' => [],
 195                         ],
 196                         'core' => [
 197                                 'site',
 198                                 'mediawiki.page.startup',
 199                                 'mediawiki.user',
 200                         ],
 201                         // modules that enhance the content in some way
 202                         'content' => [
 203                                 'mediawiki.page.ready',
 204                         ],
 205                         // modules relating to search functionality
 206                         'search' => [],
 207                         // modules relating to functionality relating to watching an article
 208                         'watch' => [],
 209                         // modules which relate to the current users preferences
 210                         'user' => [],
 211                         // modules relating to RSS/Atom Feeds
 212                         'syndicate' => [],
 213                 ];
 214
 215                 // Support for high-density display images if enabled
 216                 if ( $config->get( 'ResponsiveImages' ) ) {
 217                         $modules['core'][] = 'mediawiki.hidpi';
 218                 }
 219
 220                 // Preload jquery.tablesorter for mediawiki.page.ready
 221                 if ( strpos( $out->getHTML(), 'sortable' ) !== false ) {
 222                         $modules['content'][] = 'jquery.tablesorter';
 223                         $modules['styles']['content'][] = 'jquery.tablesorter.styles';
 224                 }
 225
 226                 // Preload jquery.makeCollapsible for mediawiki.page.ready
 227                 if ( strpos( $out->getHTML(), 'mw-collapsible' ) !== false ) {
 228                         $modules['content'][] = 'jquery.makeCollapsible';
 229                         $modules['styles']['content'][] = 'jquery.makeCollapsible.styles';
 230                 }
 231
 232                 // Deprecated since 1.26: Unconditional loading of mediawiki.ui.button
 233                 // on every page is deprecated. Express a dependency instead.
 234                 if ( strpos( $out->getHTML(), 'mw-ui-button' ) !== false ) {
 235                         $modules['styles']['content'][] = 'mediawiki.ui.button';
 236                 }
 237
 238                 if ( $out->isTOCEnabled() ) {
 239                         $modules['content'][] = 'mediawiki.toc';
 240                 }
 241
 242                 // Add various resources if required
 243                 if ( $user->isLoggedIn()
 244                         && $user->isAllowedAll( 'writeapi', 'viewmywatchlist', 'editmywatchlist' )
 245                         && $this->getRelevantTitle()->canExist()
 246                 ) {
 247                         $modules['watch'][] = 'mediawiki.page.watch.ajax';
 248                 }
 249
 250                 $modules['search'][] = 'mediawiki.searchSuggest';
 251
 252                 if ( $user->getBoolOption( 'editsectiononrightclick' ) ) {
 253                         $modules['user'][] = 'mediawiki.action.view.rightClickEdit';
 254                 }
 255
 256                 // Crazy edit-on-double-click stuff
 257                 if ( $out->isArticle() && $user->getOption( 'editondblclick' ) ) {
 258                         $modules['user'][] = 'mediawiki.action.view.dblClickEdit';
 259                 }
 260
 261                 if ( $out->isSyndicated() ) {
 262                         $modules['styles']['syndicate'][] = 'mediawiki.feedlink';
 263                 }
 264
 265                 return $modules;
 266         }
 267
 268         /**
 269          * Preload the existence of three commonly-requested pages in a single query
 270          */
 271         protected function preloadExistence() {
 272                 $titles = [];
 273
 274                 // User/talk link
 275                 $user = $this->getUser();
 276                 if ( $user->isLoggedIn() ) {
 277                         $titles[] = $user->getUserPage();
 278                         $titles[] = $user->getTalkPage();
 279                 }
 280
 281                 // Check, if the page can hold some kind of content, otherwise do nothing
 282                 $title = $this->getRelevantTitle();
 283                 if ( $title->canExist() ) {
 284                         if ( $title->isTalkPage() ) {
 285                                 $titles[] = $title->getSubjectPage();
 286                         } else {
 287                                 $titles[] = $title->getTalkPage();
 288                         }
 289                 }
 290
 291                 // Footer links (used by SkinTemplate::prepareQuickTemplate)
 292                 foreach ( [
 293                         $this->footerLinkTitle( 'privacy', 'privacypage' ),
 294                         $this->footerLinkTitle( 'aboutsite', 'aboutpage' ),
 295                         $this->footerLinkTitle( 'disclaimers', 'disclaimerpage' ),
 296                 ] as $title ) {
 297                         if ( $title ) {
 298                                 $titles[] = $title;
 299                         }
 300                 }
 301
 302                 Hooks::run( 'SkinPreloadExistence', [ &$titles, $this ] );
 303
 304                 if ( $titles ) {
 305                         $lb = new LinkBatch( $titles );
 306                         $lb->setCaller( __METHOD__ );
 307                         $lb->execute();
 308                 }
 309         }
 310
 311         /**
 312          * Get the current revision ID
 313          *
 314          * @return int
 315          */
 316         public function getRevisionId() {
 317                 return $this->getOutput()->getRevisionId();
 318         }
 319
 320         /**
 321          * Whether the revision displayed is the latest revision of the page
 322          *
 323          * @return bool
 324          */
 325         public function isRevisionCurrent() {
 326                 $revID = $this->getRevisionId();
 327                 return $revID == 0 || $revID == $this->getTitle()->getLatestRevID();
 328         }
 329
 330         /**
 331          * Set the "relevant" title
 332          * @see self::getRelevantTitle()
 333          * @param Title $t
 334          */
 335         public function setRelevantTitle( $t ) {
 336                 $this->mRelevantTitle = $t;
 337         }
 338
 339         /**
 340          * Return the "relevant" title.
 341          * A "relevant" title is not necessarily the actual title of the page.
 342          * Special pages like Special:MovePage use set the page they are acting on
 343          * as their "relevant" title, this allows the skin system to display things
 344          * such as content tabs which belong to to that page instead of displaying
 345          * a basic special page tab which has almost no meaning.
 346          *
 347          * @return Title
 348          */
 349         public function getRelevantTitle() {
 350                 if ( isset( $this->mRelevantTitle ) ) {
 351                         return $this->mRelevantTitle;
 352                 }
 353                 return $this->getTitle();
 354         }
 355
 356         /**
 357          * Set the "relevant" user
 358          * @see self::getRelevantUser()
 359          * @param User $u
 360          */
 361         public function setRelevantUser( $u ) {
 362                 $this->mRelevantUser = $u;
 363         }
 364
 365         /**
 366          * Return the "relevant" user.
 367          * A "relevant" user is similar to a relevant title. Special pages like
 368          * Special:Contributions mark the user which they are relevant to so that
 369          * things like the toolbox can display the information they usually are only
 370          * able to display on a user's userpage and talkpage.
 371          * @return User
 372          */
 373         public function getRelevantUser() {
 374                 if ( isset( $this->mRelevantUser ) ) {
 375                         return $this->mRelevantUser;
 376                 }
 377                 $title = $this->getRelevantTitle();
 378                 if ( $title->hasSubjectNamespace( NS_USER ) ) {
 379                         $rootUser = $title->getRootText();
 380                         if ( User::isIP( $rootUser ) ) {
 381                                 $this->mRelevantUser = User::newFromName( $rootUser, false );
 382                         } else {
 383                                 $user = User::newFromName( $rootUser, false );
 384
 385                                 if ( $user ) {
 386                                         $user->load( User::READ_NORMAL );
 387
 388                                         if ( $user->isLoggedIn() ) {
 389                                                 $this->mRelevantUser = $user;
 390                                         }
 391                                 }
 392                         }
 393                         return $this->mRelevantUser;
 394                 }
 395                 return null;
 396         }
 397
 398         /**
 399          * Outputs the HTML generated by other functions.
 400          * @param OutputPage $out
 401          */
 402         abstract function outputPage( OutputPage $out = null );
 403
 404         /**
 405          * @param array $data
 406          * @param string $nonce OutputPage::getCSPNonce()
 407          * @return string|WrappedString HTML
 408          */
 409         static function makeVariablesScript( $data, $nonce = null ) {
 410                 if ( $data ) {
 411                         return ResourceLoader::makeInlineScript(
 412                                 ResourceLoader::makeConfigSetScript( $data ),
 413                                 $nonce
 414                         );
 415                 } else {
 416                         return '';
 417                 }
 418         }
 419
 420         /**
 421          * Get the query to generate a dynamic stylesheet
 422          *
 423          * @return array
 424          */
 425         public static function getDynamicStylesheetQuery() {
 426                 global $wgSquidMaxage;
 427
 428                 return [
 429                                 'action' => 'raw',
 430                                 'maxage' => $wgSquidMaxage,
 431                                 'usemsgcache' => 'yes',
 432                                 'ctype' => 'text/css',
 433                                 'smaxage' => $wgSquidMaxage,
 434                         ];
 435         }
 436
 437         /**
 438          * Hook point for adding style modules to OutputPage.
 439          *
 440          * @deprecated since 1.32 Use getDefaultModules() instead.
 441          * @param OutputPage $out Legacy parameter, identical to $this->getOutput()
 442          */
 443         public function setupSkinUserCss( OutputPage $out ) {
 444                 // Stub.
 445         }
 446
 447         /**
 448          * TODO: document
 449          * @param Title $title
 450          * @return string
 451          */
 452         function getPageClasses( $title ) {
 453                 $numeric = 'ns-' . $title->getNamespace();
 454
 455                 if ( $title->isSpecialPage() ) {
 456                         $type = 'ns-special';
 457                         // T25315: provide a class based on the canonical special page name without subpages
 458                         list( $canonicalName ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );
 459                         if ( $canonicalName ) {
 460                                 $type .= ' ' . Sanitizer::escapeClass( "mw-special-$canonicalName" );
 461                         } else {
 462                                 $type .= ' mw-invalidspecialpage';
 463                         }
 464                 } elseif ( $title->isTalkPage() ) {
 465                         $type = 'ns-talk';
 466                 } else {
 467                         $type = 'ns-subject';
 468                 }
 469
 470                 $name = Sanitizer::escapeClass( 'page-' . $title->getPrefixedText() );
 471                 $root = Sanitizer::escapeClass( 'rootpage-' . $title->getRootTitle()->getPrefixedText() );
 472
 473                 return "$numeric $type $name $root";
 474         }
 475
 476         /**
 477          * Return values for <html> element
 478          * @return array Array of associative name-to-value elements for <html> element
 479          */
 480         public function getHtmlElementAttributes() {
 481                 $lang = $this->getLanguage();
 482                 return [
 483                         'lang' => $lang->getHtmlCode(),
 484                         'dir' => $lang->getDir(),
 485                         'class' => 'client-nojs',
 486                 ];
 487         }
 488
 489         /**
 490          * This will be called by OutputPage::headElement when it is creating the
 491          * "<body>" tag, skins can override it if they have a need to add in any
 492          * body attributes or classes of their own.
 493          * @param OutputPage $out
 494          * @param array &$bodyAttrs
 495          */
 496         function addToBodyAttributes( $out, &$bodyAttrs ) {
 497                 // does nothing by default
 498         }
 499
 500         /**
 501          * URL to the logo
 502          * @return string
 503          */
 504         function getLogo() {
 505                 global $wgLogo;
 506                 return $wgLogo;
 507         }
 508
 509         /**
 510          * Whether the logo should be preloaded with an HTTP link header or not
 511          * @since 1.29
 512          * @return bool
 513          */
 514         public function shouldPreloadLogo() {
 515                 return false;
 516         }
 517
 518         /**
 519          * @return string HTML
 520          */
 521         function getCategoryLinks() {
 522                 global $wgUseCategoryBrowser;
 523
 524                 $out = $this->getOutput();
 525                 $allCats = $out->getCategoryLinks();
 526
 527                 if ( !count( $allCats ) ) {
 528                         return '';
 529                 }
 530
 531                 $embed = "<li>";
 532                 $pop = "</li>";
 533
 534                 $s = '';
 535                 $colon = $this->msg( 'colon-separator' )->escaped();
 536
 537                 if ( !empty( $allCats['normal'] ) ) {
 538                         $t = $embed . implode( "{$pop}{$embed}", $allCats['normal'] ) . $pop;
 539
 540                         $msg = $this->msg( 'pagecategories' )->numParams( count( $allCats['normal'] ) )->escaped();
 541                         $linkPage = wfMessage( 'pagecategorieslink' )->inContentLanguage()->text();
 542                         $title = Title::newFromText( $linkPage );
 543                         $link = $title ? Linker::link( $title, $msg ) : $msg;
 544                         $s .= '<div id="mw-normal-catlinks" class="mw-normal-catlinks">' .
 545                                 $link . $colon . '<ul>' . $t . '</ul>' . '</div>';
 546                 }
 547
 548                 # Hidden categories
 549                 if ( isset( $allCats['hidden'] ) ) {
 550                         if ( $this->getUser()->getBoolOption( 'showhiddencats' ) ) {
 551                                 $class = ' mw-hidden-cats-user-shown';
 552                         } elseif ( $this->getTitle()->getNamespace() == NS_CATEGORY ) {
 553                                 $class = ' mw-hidden-cats-ns-shown';
 554                         } else {
 555                                 $class = ' mw-hidden-cats-hidden';
 556                         }
 557
 558                         $s .= "<div id=\"mw-hidden-catlinks\" class=\"mw-hidden-catlinks$class\">" .
 559                                 $this->msg( 'hidden-categories' )->numParams( count( $allCats['hidden'] ) )->escaped() .
 560                                 $colon . '<ul>' . $embed . implode( "{$pop}{$embed}", $allCats['hidden'] ) . $pop . '</ul>' .
 561                                 '</div>';
 562                 }
 563
 564                 # optional 'dmoz-like' category browser. Will be shown under the list
 565                 # of categories an article belong to
 566                 if ( $wgUseCategoryBrowser ) {
 567                         $s .= '<br /><hr />';
 568
 569                         # get a big array of the parents tree
 570                         $parenttree = $this->getTitle()->getParentCategoryTree();
 571                         # Skin object passed by reference cause it can not be
 572                         # accessed under the method subfunction drawCategoryBrowser
 573                         $tempout = explode( "\n", $this->drawCategoryBrowser( $parenttree ) );
 574                         # Clean out bogus first entry and sort them
 575                         unset( $tempout[0] );
 576                         asort( $tempout );
 577                         # Output one per line
 578                         $s .= implode( "<br />\n", $tempout );
 579                 }
 580
 581                 return $s;
 582         }
 583
 584         /**
 585          * Render the array as a series of links.
 586          * @param array $tree Categories tree returned by Title::getParentCategoryTree
 587          * @return string Separated by &gt;, terminate with "\n"
 588          */
 589         function drawCategoryBrowser( $tree ) {
 590                 $return = '';
 591
 592                 foreach ( $tree as $element => $parent ) {
 593                         if ( empty( $parent ) ) {
 594                                 # element start a new list
 595                                 $return .= "\n";
 596                         } else {
 597                                 # grab the others elements
 598                                 $return .= $this->drawCategoryBrowser( $parent ) . ' &gt; ';
 599                         }
 600
 601                         # add our current element to the list
 602                         $eltitle = Title::newFromText( $element );
 603                         $return .= Linker::link( $eltitle, htmlspecialchars( $eltitle->getText() ) );
 604                 }
 605
 606                 return $return;
 607         }
 608
 609         /**
 610          * @return string HTML
 611          */
 612         function getCategories() {
 613                 $out = $this->getOutput();
 614                 $catlinks = $this->getCategoryLinks();
 615
 616                 // Check what we're showing
 617                 $allCats = $out->getCategoryLinks();
 618                 $showHidden = $this->getUser()->getBoolOption( 'showhiddencats' ) ||
 619                                                 $this->getTitle()->getNamespace() == NS_CATEGORY;
 620
 621                 $classes = [ 'catlinks' ];
 622                 if ( empty( $allCats['normal'] ) && !( !empty( $allCats['hidden'] ) && $showHidden ) ) {
 623                         $classes[] = 'catlinks-allhidden';
 624                 }
 625
 626                 return Html::rawElement(
 627                         'div',
 628                         [ 'id' => 'catlinks', 'class' => $classes, 'data-mw' => 'interface' ],
 629                         $catlinks
 630                 );
 631         }
 632
 633         /**
 634          * This runs a hook to allow extensions placing their stuff after content
 635          * and article metadata (e.g. categories).
 636          * Note: This function has nothing to do with afterContent().
 637          *
 638          * This hook is placed here in order to allow using the same hook for all
 639          * skins, both the SkinTemplate based ones and the older ones, which directly
 640          * use this class to get their data.
 641          *
 642          * The output of this function gets processed in SkinTemplate::outputPage() for
 643          * the SkinTemplate based skins, all other skins should directly echo it.
 644          *
 645          * @return string Empty by default, if not changed by any hook function.
 646          */
 647         protected function afterContentHook() {
 648                 $data = '';
 649
 650                 if ( Hooks::run( 'SkinAfterContent', [ &$data, $this ] ) ) {
 651                         // adding just some spaces shouldn't toggle the output
 652                         // of the whole <div/>, so we use trim() here
 653                         if ( trim( $data ) != '' ) {
 654                                 // Doing this here instead of in the skins to
 655                                 // ensure that the div has the same ID in all
 656                                 // skins
 657                                 $data = "<div id='mw-data-after-content'>\n" .
 658                                         "\t$data\n" .
 659                                         "</div>\n";
 660                         }
 661                 } else {
 662                         wfDebug( "Hook SkinAfterContent changed output processing.\n" );
 663                 }
 664
 665                 return $data;
 666         }
 667
 668         /**
 669          * Generate debug data HTML for displaying at the bottom of the main content
 670          * area.
 671          * @return string HTML containing debug data, if enabled (otherwise empty).
 672          */
 673         protected function generateDebugHTML() {
 674                 return MWDebug::getHTMLDebugLog();
 675         }
 676
 677         /**
 678          * This gets called shortly before the "</body>" tag.
 679          *
 680          * @return string|WrappedStringList HTML containing scripts to put before `</body>`
 681          */
 682         function bottomScripts() {
 683                 // TODO and the suckage continues. This function is really just a wrapper around
 684                 // OutputPage::getBottomScripts() which takes a Skin param. This should be cleaned
 685                 // up at some point
 686                 $chunks = [ $this->getOutput()->getBottomScripts() ];
 687
 688                 // Keep the hook appendage separate to preserve WrappedString objects.
 689                 // This enables BaseTemplate::getTrail() to merge them where possible.
 690                 $extraHtml = '';
 691                 Hooks::run( 'SkinAfterBottomScripts', [ $this, &$extraHtml ] );
 692                 if ( $extraHtml !== '' ) {
 693                         $chunks[] = $extraHtml;
 694                 }
 695                 return WrappedString::join( "\n", $chunks );
 696         }
 697
 698         /**
 699          * Text with the permalink to the source page,
 700          * usually shown on the footer of a printed page
 701          *
 702          * @return string HTML text with an URL
 703          */
 704         function printSource() {
 705                 $oldid = $this->getRevisionId();
 706                 if ( $oldid ) {
 707                         $canonicalUrl = $this->getTitle()->getCanonicalURL( 'oldid=' . $oldid );
 708                         $url = htmlspecialchars( wfExpandIRI( $canonicalUrl ) );
 709                 } else {
 710                         // oldid not available for non existing pages
 711                         $url = htmlspecialchars( wfExpandIRI( $this->getTitle()->getCanonicalURL() ) );
 712                 }
 713
 714                 return $this->msg( 'retrievedfrom' )
 715                         ->rawParams( '<a dir="ltr" href="' . $url . '">' . $url . '</a>' )
 716                         ->parse();
 717         }
 718
 719         /**
 720          * @return string HTML
 721          */
 722         function getUndeleteLink() {
 723                 $action = $this->getRequest()->getVal( 'action', 'view' );
 724
 725                 if ( $this->getTitle()->userCan( 'deletedhistory', $this->getUser() ) &&
 726                         ( !$this->getTitle()->exists() || $action == 'history' ) ) {
 727                         $n = $this->getTitle()->isDeleted();
 728
 729                         if ( $n ) {
 730                                 if ( $this->getTitle()->quickUserCan( 'undelete', $this->getUser() ) ) {
 731                                         $msg = 'thisisdeleted';
 732                                 } else {
 733                                         $msg = 'viewdeleted';
 734                                 }
 735
 736                                 return $this->msg( $msg )->rawParams(
 737                                         Linker::linkKnown(
 738                                                 SpecialPage::getTitleFor( 'Undelete', $this->getTitle()->getPrefixedDBkey() ),
 739                                                 $this->msg( 'restorelink' )->numParams( $n )->escaped() )
 740                                         )->escaped();
 741                         }
 742                 }
 743
 744                 return '';
 745         }
 746
 747         /**
 748          * @param OutputPage $out Defaults to $this->getOutput() if left as null
 749          * @return string
 750          */
 751         function subPageSubtitle( $out = null ) {
 752                 if ( $out === null ) {
 753                         $out = $this->getOutput();
 754                 }
 755                 $title = $out->getTitle();
 756                 $subpages = '';
 757
 758                 if ( !Hooks::run( 'SkinSubPageSubtitle', [ &$subpages, $this, $out ] ) ) {
 759                         return $subpages;
 760                 }
 761
 762                 if ( $out->isArticle() && MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 763                         $ptext = $title->getPrefixedText();
 764                         if ( strpos( $ptext, '/' ) !== false ) {
 765                                 $links = explode( '/', $ptext );
 766                                 array_pop( $links );
 767                                 $c = 0;
 768                                 $growinglink = '';
 769                                 $display = '';
 770                                 $lang = $this->getLanguage();
 771
 772                                 foreach ( $links as $link ) {
 773                                         $growinglink .= $link;
 774                                         $display .= $link;
 775                                         $linkObj = Title::newFromText( $growinglink );
 776
 777                                         if ( is_object( $linkObj ) && $linkObj->isKnown() ) {
 778                                                 $getlink = Linker::linkKnown(
 779                                                         $linkObj,
 780                                                         htmlspecialchars( $display )
 781                                                 );
 782
 783                                                 $c++;
 784
 785                                                 if ( $c > 1 ) {
 786                                                         $subpages .= $lang->getDirMarkEntity() . $this->msg( 'pipe-separator' )->escaped();
 787                                                 } else {
 788                                                         $subpages .= '&lt; ';
 789                                                 }
 790
 791                                                 $subpages .= $getlink;
 792                                                 $display = '';
 793                                         } else {
 794                                                 $display .= '/';
 795                                         }
 796                                         $growinglink .= '/';
 797                                 }
 798                         }
 799                 }
 800
 801                 return $subpages;
 802         }
 803
 804         /**
 805          * @return string
 806          */
 807         function getSearchLink() {
 808                 $searchPage = SpecialPage::getTitleFor( 'Search' );
 809                 return $searchPage->getLocalURL();
 810         }
 811
 812         /**
 813          * @return string
 814          */
 815         function escapeSearchLink() {
 816                 return htmlspecialchars( $this->getSearchLink() );
 817         }
 818
 819         /**
 820          * @param string $type
 821          * @return string
 822          */
 823         function getCopyright( $type = 'detect' ) {
 824                 global $wgRightsPage, $wgRightsUrl, $wgRightsText;
 825
 826                 if ( $type == 'detect' ) {
 827                         if ( !$this->isRevisionCurrent()
 828                                 && !$this->msg( 'history_copyright' )->inContentLanguage()->isDisabled()
 829                         ) {
 830                                 $type = 'history';
 831                         } else {
 832                                 $type = 'normal';
 833                         }
 834                 }
 835
 836                 if ( $type == 'history' ) {
 837                         $msg = 'history_copyright';
 838                 } else {
 839                         $msg = 'copyright';
 840                 }
 841
 842                 if ( $wgRightsPage ) {
 843                         $title = Title::newFromText( $wgRightsPage );
 844                         $link = Linker::linkKnown( $title, $wgRightsText );
 845                 } elseif ( $wgRightsUrl ) {
 846                         $link = Linker::makeExternalLink( $wgRightsUrl, $wgRightsText );
 847                 } elseif ( $wgRightsText ) {
 848                         $link = $wgRightsText;
 849                 } else {
 850                         # Give up now
 851                         return '';
 852                 }
 853
 854                 // Allow for site and per-namespace customization of copyright notice.
 855                 // @todo Remove deprecated $forContent param from hook handlers and then remove here.
 856                 $forContent = true;
 857
 858                 Hooks::run(
 859                         'SkinCopyrightFooter',
 860                         [ $this->getTitle(), $type, &$msg, &$link, &$forContent ]
 861                 );
 862
 863                 return $this->msg( $msg )->rawParams( $link )->text();
 864         }
 865
 866         /**
 867          * @return null|string
 868          */
 869         function getCopyrightIcon() {
 870                 global $wgRightsUrl, $wgRightsText, $wgRightsIcon, $wgFooterIcons;
 871
 872                 $out = '';
 873
 874                 if ( $wgFooterIcons['copyright']['copyright'] ) {
 875                         $out = $wgFooterIcons['copyright']['copyright'];
 876                 } elseif ( $wgRightsIcon ) {
 877                         $icon = htmlspecialchars( $wgRightsIcon );
 878
 879                         if ( $wgRightsUrl ) {
 880                                 $url = htmlspecialchars( $wgRightsUrl );
 881                                 $out .= '<a href="' . $url . '">';
 882                         }
 883
 884                         $text = htmlspecialchars( $wgRightsText );
 885                         $out .= "<img src=\"$icon\" alt=\"$text\" width=\"88\" height=\"31\" />";
 886
 887                         if ( $wgRightsUrl ) {
 888                                 $out .= '</a>';
 889                         }
 890                 }
 891
 892                 return $out;
 893         }
 894
 895         /**
 896          * Gets the powered by MediaWiki icon.
 897          * @return string
 898          */
 899         function getPoweredBy() {
 900                 global $wgResourceBasePath;
 901
 902                 $url1 = htmlspecialchars(
 903                         "$wgResourceBasePath/resources/assets/poweredby_mediawiki_88x31.png"
 904                 );
 905                 $url1_5 = htmlspecialchars(
 906                         "$wgResourceBasePath/resources/assets/poweredby_mediawiki_132x47.png"
 907                 );
 908                 $url2 = htmlspecialchars(
 909                         "$wgResourceBasePath/resources/assets/poweredby_mediawiki_176x62.png"
 910                 );
 911                 $text = '<a href="//www.mediawiki.org/"><img src="' . $url1
 912                         . '" srcset="' . $url1_5 . ' 1.5x, ' . $url2 . ' 2x" '
 913                         . 'height="31" width="88" alt="Powered by MediaWiki" /></a>';
 914                 Hooks::run( 'SkinGetPoweredBy', [ &$text, $this ] );
 915                 return $text;
 916         }
 917
 918         /**
 919          * Get the timestamp of the latest revision, formatted in user language
 920          *
 921          * @return string
 922          */
 923         protected function lastModified() {
 924                 $timestamp = $this->getOutput()->getRevisionTimestamp();
 925
 926                 # No cached timestamp, load it from the database
 927                 if ( $timestamp === null ) {
 928                         $timestamp = Revision::getTimestampFromId( $this->getTitle(), $this->getRevisionId() );
 929                 }
 930
 931                 if ( $timestamp ) {
 932                         $d = $this->getLanguage()->userDate( $timestamp, $this->getUser() );
 933                         $t = $this->getLanguage()->userTime( $timestamp, $this->getUser() );
 934                         $s = ' ' . $this->msg( 'lastmodifiedat', $d, $t )->parse();
 935                 } else {
 936                         $s = '';
 937                 }
 938
 939                 if ( MediaWikiServices::getInstance()->getDBLoadBalancer()->getLaggedReplicaMode() ) {
 940                         $s .= ' <strong>' . $this->msg( 'laggedslavemode' )->parse() . '</strong>';
 941                 }
 942
 943                 return $s;
 944         }
 945
 946         /**
 947          * @param string $align
 948          * @return string
 949          */
 950         function logoText( $align = '' ) {
 951                 if ( $align != '' ) {
 952                         $a = " style='float: {$align};'";
 953                 } else {
 954                         $a = '';
 955                 }
 956
 957                 $mp = $this->msg( 'mainpage' )->escaped();
 958                 $mptitle = Title::newMainPage();
 959                 $url = ( is_object( $mptitle ) ? htmlspecialchars( $mptitle->getLocalURL() ) : '' );
 960
 961                 $logourl = $this->getLogo();
 962                 $s = "<a href='{$url}'><img{$a} src='{$logourl}' alt='[{$mp}]' /></a>";
 963
 964                 return $s;
 965         }
 966
 967         /**
 968          * Renders a $wgFooterIcons icon according to the method's arguments
 969          * @param array $icon The icon to build the html for, see $wgFooterIcons
 970          *   for the format of this array.
 971          * @param bool|string $withImage Whether to use the icon's image or output
 972          *   a text-only footericon.
 973          * @return string HTML
 974          */
 975         function makeFooterIcon( $icon, $withImage = 'withImage' ) {
 976                 if ( is_string( $icon ) ) {
 977                         $html = $icon;
 978                 } else { // Assuming array
 979                         $url = $icon["url"] ?? null;
 980                         unset( $icon["url"] );
 981                         if ( isset( $icon["src"] ) && $withImage === 'withImage' ) {
 982                                 // do this the lazy way, just pass icon data as an attribute array
 983                                 $html = Html::element( 'img', $icon );
 984                         } else {
 985                                 $html = htmlspecialchars( $icon["alt"] );
 986                         }
 987                         if ( $url ) {
 988                                 global $wgExternalLinkTarget;
 989                                 $html = Html::rawElement( 'a',
 990                                         [ "href" => $url, "target" => $wgExternalLinkTarget ],
 991                                         $html );
 992                         }
 993                 }
 994                 return $html;
 995         }
 996
 997         /**
 998          * Gets the link to the wiki's main page.
 999          * @return string
1000          */
1001         function mainPageLink() {
1002                 $s = Linker::linkKnown(
1003                         Title::newMainPage(),
1004                         $this->msg( 'mainpage' )->escaped()
1005                 );
1006
1007                 return $s;
1008         }
1009
1010         /**
1011          * Returns an HTML link for use in the footer
1012          * @param string $desc The i18n message key for the link text
1013          * @param string $page The i18n message key for the page to link to
1014          * @return string HTML anchor
1015          */
1016         public function footerLink( $desc, $page ) {
1017                 $title = $this->footerLinkTitle( $desc, $page );
1018                 if ( !$title ) {
1019                         return '';
1020                 }
1021
1022                 return Linker::linkKnown(
1023                         $title,
1024                         $this->msg( $desc )->escaped()
1025                 );
1026         }
1027
1028         /**
1029          * @param string $desc
1030          * @param string $page
1031          * @return Title|null
1032          */
1033         private function footerLinkTitle( $desc, $page ) {
1034                 // If the link description has been set to "-" in the default language,
1035                 if ( $this->msg( $desc )->inContentLanguage()->isDisabled() ) {
1036                         // then it is disabled, for all languages.
1037                         return null;
1038                 }
1039                 // Otherwise, we display the link for the user, described in their
1040                 // language (which may or may not be the same as the default language),
1041                 // but we make the link target be the one site-wide page.
1042                 $title = Title::newFromText( $this->msg( $page )->inContentLanguage()->text() );
1043
1044                 return $title ?: null;
1045         }
1046
1047         /**
1048          * Gets the link to the wiki's privacy policy page.
1049          * @return string HTML
1050          */
1051         function privacyLink() {
1052                 return $this->footerLink( 'privacy', 'privacypage' );
1053         }
1054
1055         /**
1056          * Gets the link to the wiki's about page.
1057          * @return string HTML
1058          */
1059         function aboutLink() {
1060                 return $this->footerLink( 'aboutsite', 'aboutpage' );
1061         }
1062
1063         /**
1064          * Gets the link to the wiki's general disclaimers page.
1065          * @return string HTML
1066          */
1067         function disclaimerLink() {
1068                 return $this->footerLink( 'disclaimers', 'disclaimerpage' );
1069         }
1070
1071         /**
1072          * Return URL options for the 'edit page' link.
1073          * This may include an 'oldid' specifier, if the current page view is such.
1074          *
1075          * @return array
1076          * @private
1077          */
1078         function editUrlOptions() {
1079                 $options = [ 'action' => 'edit' ];
1080
1081                 if ( !$this->isRevisionCurrent() ) {
1082                         $options['oldid'] = intval( $this->getRevisionId() );
1083                 }
1084
1085                 return $options;
1086         }
1087
1088         /**
1089          * @param User|int $id
1090          * @return bool
1091          */
1092         function showEmailUser( $id ) {
1093                 if ( $id instanceof User ) {
1094                         $targetUser = $id;
1095                 } else {
1096                         $targetUser = User::newFromId( $id );
1097                 }
1098
1099                 # The sending user must have a confirmed email address and the receiving
1100                 # user must accept emails from the sender.
1101                 return $this->getUser()->canSendEmail()
1102                         && SpecialEmailUser::validateTarget( $targetUser, $this->getUser() ) === '';
1103         }
1104
1105         /**
1106          * Return a fully resolved style path URL to images or styles stored in the
1107          * current skin's folder. This method returns a URL resolved using the
1108          * configured skin style path.
1109          *
1110          * Requires $stylename to be set, otherwise throws MWException.
1111          *
1112          * @param string $name The name or path of a skin resource file
1113          * @return string The fully resolved style path URL
1114          * @throws MWException
1115          */
1116         function getSkinStylePath( $name ) {
1117                 global $wgStylePath;
1118
1119                 if ( $this->stylename === null ) {
1120                         $class = static::class;
1121                         throw new MWException( "$class::\$stylename must be set to use getSkinStylePath()" );
1122                 }
1123
1124                 return "$wgStylePath/{$this->stylename}/$name";
1125         }
1126
1127         /* these are used extensively in SkinTemplate, but also some other places */
1128
1129         /**
1130          * @param string|string[] $urlaction
1131          * @return string
1132          */
1133         static function makeMainPageUrl( $urlaction = '' ) {
1134                 $title = Title::newMainPage();
1135                 self::checkTitle( $title, '' );
1136
1137                 return $title->getLinkURL( $urlaction );
1138         }
1139
1140         /**
1141          * Make a URL for a Special Page using the given query and protocol.
1142          *
1143          * If $proto is set to null, make a local URL. Otherwise, make a full
1144          * URL with the protocol specified.
1145          *
1146          * @param string $name Name of the Special page
1147          * @param string|string[] $urlaction Query to append
1148          * @param string|null $proto Protocol to use or null for a local URL
1149          * @return string
1150          */
1151         static function makeSpecialUrl( $name, $urlaction = '', $proto = null ) {
1152                 $title = SpecialPage::getSafeTitleFor( $name );
1153                 if ( is_null( $proto ) ) {
1154                         return $title->getLocalURL( $urlaction );
1155                 } else {
1156                         return $title->getFullURL( $urlaction, false, $proto );
1157                 }
1158         }
1159
1160         /**
1161          * @param string $name
1162          * @param string $subpage
1163          * @param string|string[] $urlaction
1164          * @return string
1165          */
1166         static function makeSpecialUrlSubpage( $name, $subpage, $urlaction = '' ) {
1167                 $title = SpecialPage::getSafeTitleFor( $name, $subpage );
1168                 return $title->getLocalURL( $urlaction );
1169         }
1170
1171         /**
1172          * @param string $name
1173          * @param string|string[] $urlaction
1174          * @return string
1175          */
1176         static function makeI18nUrl( $name, $urlaction = '' ) {
1177                 $title = Title::newFromText( wfMessage( $name )->inContentLanguage()->text() );
1178                 self::checkTitle( $title, $name );
1179                 return $title->getLocalURL( $urlaction );
1180         }
1181
1182         /**
1183          * @param string $name
1184          * @param string|string[] $urlaction
1185          * @return string
1186          */
1187         static function makeUrl( $name, $urlaction = '' ) {
1188                 $title = Title::newFromText( $name );
1189                 self::checkTitle( $title, $name );
1190
1191                 return $title->getLocalURL( $urlaction );
1192         }
1193
1194         /**
1195          * If url string starts with http, consider as external URL, else
1196          * internal
1197          * @param string $name
1198          * @return string URL
1199          */
1200         static function makeInternalOrExternalUrl( $name ) {
1201                 if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $name ) ) {
1202                         return $name;
1203                 } else {
1204                         return self::makeUrl( $name );
1205                 }
1206         }
1207
1208         /**
1209          * this can be passed the NS number as defined in Language.php
1210          * @param string $name
1211          * @param string|string[] $urlaction
1212          * @param int $namespace
1213          * @return string
1214          */
1215         static function makeNSUrl( $name, $urlaction = '', $namespace = NS_MAIN ) {
1216                 $title = Title::makeTitleSafe( $namespace, $name );
1217                 self::checkTitle( $title, $name );
1218
1219                 return $title->getLocalURL( $urlaction );
1220         }
1221
1222         /**
1223          * these return an array with the 'href' and boolean 'exists'
1224          * @param string $name
1225          * @param string|string[] $urlaction
1226          * @return array
1227          */
1228         static function makeUrlDetails( $name, $urlaction = '' ) {
1229                 $title = Title::newFromText( $name );
1230                 self::checkTitle( $title, $name );
1231
1232                 return [
1233                         'href' => $title->getLocalURL( $urlaction ),
1234                         'exists' => $title->isKnown(),
1235                 ];
1236         }
1237
1238         /**
1239          * Make URL details where the article exists (or at least it's convenient to think so)
1240          * @param string $name Article name
1241          * @param string|string[] $urlaction
1242          * @return array
1243          */
1244         static function makeKnownUrlDetails( $name, $urlaction = '' ) {
1245                 $title = Title::newFromText( $name );
1246                 self::checkTitle( $title, $name );
1247
1248                 return [
1249                         'href' => $title->getLocalURL( $urlaction ),
1250                         'exists' => true
1251                 ];
1252         }
1253
1254         /**
1255          * make sure we have some title to operate on
1256          *
1257          * @param Title &$title
1258          * @param string $name
1259          */
1260         static function checkTitle( &$title, $name ) {
1261                 if ( !is_object( $title ) ) {
1262                         $title = Title::newFromText( $name );
1263                         if ( !is_object( $title ) ) {
1264                                 $title = Title::newFromText( '--error: link target missing--' );
1265                         }
1266                 }
1267         }
1268
1269         /**
1270          * Build an array that represents the sidebar(s), the navigation bar among them.
1271          *
1272          * BaseTemplate::getSidebar can be used to simplify the format and id generation in new skins.
1273          *
1274          * The format of the returned array is [ heading => content, ... ], where:
1275          * - heading is the heading of a navigation portlet. It is either:
1276          *   - magic string to be handled by the skins ('SEARCH' / 'LANGUAGES' / 'TOOLBOX' / ...)
1277          *   - a message name (e.g. 'navigation'), the message should be HTML-escaped by the skin
1278          *   - plain text, which should be HTML-escaped by the skin
1279          * - content is the contents of the portlet. It is either:
1280          *   - HTML text (<ul><li>...</li>...</ul>)
1281          *   - array of link data in a format accepted by BaseTemplate::makeListItem()
1282          *   - (for a magic string as a key, any value)
1283          *
1284          * Note that extensions can control the sidebar contents using the SkinBuildSidebar hook
1285          * and can technically insert anything in here; skin creators are expected to handle
1286          * values described above.
1287          *
1288          * @return array
1289          */
1290         public function buildSidebar() {
1291                 global $wgEnableSidebarCache, $wgSidebarCacheExpiry;
1292
1293                 $callback = function ( $old = null, &$ttl = null ) {
1294                         $bar = [];
1295                         $this->addToSidebar( $bar, 'sidebar' );
1296                         Hooks::run( 'SkinBuildSidebar', [ $this, &$bar ] );
1297                         if ( MessageCache::singleton()->isDisabled() ) {
1298                                 $ttl = WANObjectCache::TTL_UNCACHEABLE; // bug T133069
1299                         }
1300
1301                         return $bar;
1302                 };
1303
1304                 $msgCache = MessageCache::singleton();
1305                 $wanCache = MediaWikiServices::getInstance()->getMainWANObjectCache();
1306
1307                 $sidebar = $wgEnableSidebarCache
1308                         ? $wanCache->getWithSetCallback(
1309                                 $wanCache->makeKey( 'sidebar', $this->getLanguage()->getCode() ),
1310                                 $wgSidebarCacheExpiry,
1311                                 $callback,
1312                                 [
1313                                         'checkKeys' => [
1314                                                 // Unless there is both no exact $code override nor an i18n definition
1315                                                 // in the the software, the only MediaWiki page to check is for $code.
1316                                                 $msgCache->getCheckKey( $this->getLanguage()->getCode() )
1317                                         ],
1318                                         'lockTSE' => 30
1319                                 ]
1320                         )
1321                         : $callback();
1322
1323                 // Apply post-processing to the cached value
1324                 Hooks::run( 'SidebarBeforeOutput', [ $this, &$sidebar ] );
1325
1326                 return $sidebar;
1327         }
1328
1329         /**
1330          * Add content from a sidebar system message
1331          * Currently only used for MediaWiki:Sidebar (but may be used by Extensions)
1332          *
1333          * This is just a wrapper around addToSidebarPlain() for backwards compatibility
1334          *
1335          * @param array &$bar
1336          * @param string $message
1337          */
1338         public function addToSidebar( &$bar, $message ) {
1339                 $this->addToSidebarPlain( $bar, wfMessage( $message )->inContentLanguage()->plain() );
1340         }
1341
1342         /**
1343          * Add content from plain text
1344          * @since 1.17
1345          * @param array &$bar
1346          * @param string $text
1347          * @return array
1348          */
1349         function addToSidebarPlain( &$bar, $text ) {
1350                 $lines = explode( "\n", $text );
1351
1352                 $heading = '';
1353                 $messageTitle = $this->getConfig()->get( 'EnableSidebarCache' )
1354                         ? Title::newMainPage() : $this->getTitle();
1355
1356                 foreach ( $lines as $line ) {
1357                         if ( strpos( $line, '*' ) !== 0 ) {
1358                                 continue;
1359                         }
1360                         $line = rtrim( $line, "\r" ); // for Windows compat
1361
1362                         if ( strpos( $line, '**' ) !== 0 ) {
1363                                 $heading = trim( $line, '* ' );
1364                                 if ( !array_key_exists( $heading, $bar ) ) {
1365                                         $bar[$heading] = [];
1366                                 }
1367                         } else {
1368                                 $line = trim( $line, '* ' );
1369
1370                                 if ( strpos( $line, '|' ) !== false ) { // sanity check
1371                                         $line = MessageCache::singleton()->transform( $line, false, null, $messageTitle );
1372                                         $line = array_map( 'trim', explode( '|', $line, 2 ) );
1373                                         if ( count( $line ) !== 2 ) {
1374                                                 // Second sanity check, could be hit by people doing
1375                                                 // funky stuff with parserfuncs... (T35321)
1376                                                 continue;
1377                                         }
1378
1379                                         $extraAttribs = [];
1380
1381                                         $msgLink = $this->msg( $line[0] )->title( $messageTitle )->inContentLanguage();
1382                                         if ( $msgLink->exists() ) {
1383                                                 $link = $msgLink->text();
1384                                                 if ( $link == '-' ) {
1385                                                         continue;
1386                                                 }
1387                                         } else {
1388                                                 $link = $line[0];
1389                                         }
1390                                         $msgText = $this->msg( $line[1] )->title( $messageTitle );
1391                                         if ( $msgText->exists() ) {
1392                                                 $text = $msgText->text();
1393                                         } else {
1394                                                 $text = $line[1];
1395                                         }
1396
1397                                         if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $link ) ) {
1398                                                 $href = $link;
1399
1400                                                 // Parser::getExternalLinkAttribs won't work here because of the Namespace things
1401                                                 global $wgNoFollowLinks, $wgNoFollowDomainExceptions;
1402                                                 if ( $wgNoFollowLinks && !wfMatchesDomainList( $href, $wgNoFollowDomainExceptions ) ) {
1403                                                         $extraAttribs['rel'] = 'nofollow';
1404                                                 }
1405
1406                                                 global $wgExternalLinkTarget;
1407                                                 if ( $wgExternalLinkTarget ) {
1408                                                         $extraAttribs['target'] = $wgExternalLinkTarget;
1409                                                 }
1410                                         } else {
1411                                                 $title = Title::newFromText( $link );
1412
1413                                                 if ( $title ) {
1414                                                         $title = $title->fixSpecialName();
1415                                                         $href = $title->getLinkURL();
1416                                                 } else {
1417                                                         $href = 'INVALID-TITLE';
1418                                                 }
1419                                         }
1420
1421                                         $bar[$heading][] = array_merge( [
1422                                                 'text' => $text,
1423                                                 'href' => $href,
1424                                                 'id' => Sanitizer::escapeIdForAttribute( 'n-' . strtr( $line[1], ' ', '-' ) ),
1425                                                 'active' => false,
1426                                         ], $extraAttribs );
1427                                 } else {
1428                                         continue;
1429                                 }
1430                         }
1431                 }
1432
1433                 return $bar;
1434         }
1435
1436         /**
1437          * Gets new talk page messages for the current user and returns an
1438          * appropriate alert message (or an empty string if there are no messages)
1439          * @return string
1440          */
1441         function getNewtalks() {
1442                 $newMessagesAlert = '';
1443                 $user = $this->getUser();
1444                 $newtalks = $user->getNewMessageLinks();
1445                 $out = $this->getOutput();
1446
1447                 // Allow extensions to disable or modify the new messages alert
1448                 if ( !Hooks::run( 'GetNewMessagesAlert', [ &$newMessagesAlert, $newtalks, $user, $out ] ) ) {
1449                         return '';
1450                 }
1451                 if ( $newMessagesAlert ) {
1452                         return $newMessagesAlert;
1453                 }
1454
1455                 if ( count( $newtalks ) == 1 && $newtalks[0]['wiki'] === wfWikiID() ) {
1456                         $uTalkTitle = $user->getTalkPage();
1457                         $lastSeenRev = $newtalks[0]['rev'] ?? null;
1458                         $nofAuthors = 0;
1459                         if ( $lastSeenRev !== null ) {
1460                                 $plural = true; // Default if we have a last seen revision: if unknown, use plural
1461                                 $latestRev = Revision::newFromTitle( $uTalkTitle, false, Revision::READ_NORMAL );
1462                                 if ( $latestRev !== null ) {
1463                                         // Singular if only 1 unseen revision, plural if several unseen revisions.
1464                                         $plural = $latestRev->getParentId() !== $lastSeenRev->getId();
1465                                         $nofAuthors = $uTalkTitle->countAuthorsBetween(
1466                                                 $lastSeenRev, $latestRev, 10, 'include_new' );
1467                                 }
1468                         } else {
1469                                 // Singular if no revision -> diff link will show latest change only in any case
1470                                 $plural = false;
1471                         }
1472                         $plural = $plural ? 999 : 1;
1473                         // 999 signifies "more than one revision". We don't know how many, and even if we did,
1474                         // the number of revisions or authors is not necessarily the same as the number of
1475                         // "messages".
1476                         $newMessagesLink = Linker::linkKnown(
1477                                 $uTalkTitle,
1478                                 $this->msg( 'newmessageslinkplural' )->params( $plural )->escaped(),
1479                                 [],
1480                                 [ 'redirect' => 'no' ]
1481                         );
1482
1483                         $newMessagesDiffLink = Linker::linkKnown(
1484                                 $uTalkTitle,
1485                                 $this->msg( 'newmessagesdifflinkplural' )->params( $plural )->escaped(),
1486                                 [],
1487                                 $lastSeenRev !== null
1488                                         ? [ 'oldid' => $lastSeenRev->getId(), 'diff' => 'cur' ]
1489                                         : [ 'diff' => 'cur' ]
1490                         );
1491
1492                         if ( $nofAuthors >= 1 && $nofAuthors <= 10 ) {
1493                                 $newMessagesAlert = $this->msg(
1494                                         'youhavenewmessagesfromusers',
1495                                         $newMessagesLink,
1496                                         $newMessagesDiffLink
1497                                 )->numParams( $nofAuthors, $plural );
1498                         } else {
1499                                 // $nofAuthors === 11 signifies "11 or more" ("more than 10")
1500                                 $newMessagesAlert = $this->msg(
1501                                         $nofAuthors > 10 ? 'youhavenewmessagesmanyusers' : 'youhavenewmessages',
1502                                         $newMessagesLink,
1503                                         $newMessagesDiffLink
1504                                 )->numParams( $plural );
1505                         }
1506                         $newMessagesAlert = $newMessagesAlert->text();
1507                         # Disable CDN cache
1508                         $out->setCdnMaxage( 0 );
1509                 } elseif ( count( $newtalks ) ) {
1510                         $sep = $this->msg( 'newtalkseparator' )->escaped();
1511                         $msgs = [];
1512
1513                         foreach ( $newtalks as $newtalk ) {
1514                                 $msgs[] = Xml::element(
1515                                         'a',
1516                                         [ 'href' => $newtalk['link'] ], $newtalk['wiki']
1517                                 );
1518                         }
1519                         $parts = implode( $sep, $msgs );
1520                         $newMessagesAlert = $this->msg( 'youhavenewmessagesmulti' )->rawParams( $parts )->escaped();
1521                         $out->setCdnMaxage( 0 );
1522                 }
1523
1524                 return $newMessagesAlert;
1525         }
1526
1527         /**
1528          * Get a cached notice
1529          *
1530          * @param string $name Message name, or 'default' for $wgSiteNotice
1531          * @return string|bool HTML fragment, or false to indicate that the caller
1532          *   should fall back to the next notice in its sequence
1533          */
1534         private function getCachedNotice( $name ) {
1535                 global $wgRenderHashAppend, $wgContLang;
1536
1537                 $needParse = false;
1538
1539                 if ( $name === 'default' ) {
1540                         // special case
1541                         global $wgSiteNotice;
1542                         $notice = $wgSiteNotice;
1543                         if ( empty( $notice ) ) {
1544                                 return false;
1545                         }
1546                 } else {
1547                         $msg = $this->msg( $name )->inContentLanguage();
1548                         if ( $msg->isBlank() ) {
1549                                 return '';
1550                         } elseif ( $msg->isDisabled() ) {
1551                                 return false;
1552                         }
1553                         $notice = $msg->plain();
1554                 }
1555
1556                 $cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
1557                 $parsed = $cache->getWithSetCallback(
1558                         // Use the extra hash appender to let eg SSL variants separately cache
1559                         // Key is verified with md5 hash of unparsed wikitext
1560                         $cache->makeKey( $name, $wgRenderHashAppend, md5( $notice ) ),
1561                         // TTL in seconds
1562                         600,
1563                         function () use ( $notice ) {
1564                                 return $this->getOutput()->parse( $notice );
1565                         }
1566                 );
1567
1568                 return Html::rawElement(
1569                         'div',
1570                         [
1571                                 'id' => 'localNotice',
1572                                 'lang' => $wgContLang->getHtmlCode(),
1573                                 'dir' => $wgContLang->getDir()
1574                         ],
1575                         $parsed
1576                 );
1577         }
1578
1579         /**
1580          * Get the site notice
1581          *
1582          * @return string HTML fragment
1583          */
1584         function getSiteNotice() {
1585                 $siteNotice = '';
1586
1587                 if ( Hooks::run( 'SiteNoticeBefore', [ &$siteNotice, $this ] ) ) {
1588                         if ( is_object( $this->getUser() ) && $this->getUser()->isLoggedIn() ) {
1589                                 $siteNotice = $this->getCachedNotice( 'sitenotice' );
1590                         } else {
1591                                 $anonNotice = $this->getCachedNotice( 'anonnotice' );
1592                                 if ( $anonNotice === false ) {
1593                                         $siteNotice = $this->getCachedNotice( 'sitenotice' );
1594                                 } else {
1595                                         $siteNotice = $anonNotice;
1596                                 }
1597                         }
1598                         if ( $siteNotice === false ) {
1599                                 $siteNotice = $this->getCachedNotice( 'default' );
1600                         }
1601                 }
1602
1603                 Hooks::run( 'SiteNoticeAfter', [ &$siteNotice, $this ] );
1604                 return $siteNotice;
1605         }
1606
1607         /**
1608          * Create a section edit link.
1609          *
1610          * @param Title $nt The title being linked to (may not be the same as
1611          *   the current page, if the section is included from a template)
1612          * @param string $section The designation of the section being pointed to,
1613          *   to be included in the link, like "&section=$section"
1614          * @param string $tooltip The tooltip to use for the link: will be escaped
1615          *   and wrapped in the 'editsectionhint' message
1616          * @param string $lang Language code
1617          * @return string HTML to use for edit link
1618          */
1619         public function doEditSectionLink( Title $nt, $section, $tooltip = null, $lang = false ) {
1620                 // HTML generated here should probably have userlangattributes
1621                 // added to it for LTR text on RTL pages
1622
1623                 $lang = wfGetLangObj( $lang );
1624
1625                 $attribs = [];
1626                 if ( !is_null( $tooltip ) ) {
1627                         $attribs['title'] = wfMessage( 'editsectionhint' )->rawParams( $tooltip )
1628                                 ->inLanguage( $lang )->text();
1629                 }
1630
1631                 $links = [
1632                         'editsection' => [
1633                                 'text' => wfMessage( 'editsection' )->inLanguage( $lang )->escaped(),
1634                                 'targetTitle' => $nt,
1635                                 'attribs' => $attribs,
1636                                 'query' => [ 'action' => 'edit', 'section' => $section ],
1637                                 'options' => [ 'noclasses', 'known' ]
1638                         ]
1639                 ];
1640
1641                 Hooks::run( 'SkinEditSectionLinks', [ $this, $nt, $section, $tooltip, &$links, $lang ] );
1642
1643                 $result = '<span class="mw-editsection"><span class="mw-editsection-bracket">[</span>';
1644
1645                 $linksHtml = [];
1646                 foreach ( $links as $k => $linkDetails ) {
1647                         $linksHtml[] = Linker::link(
1648                                 $linkDetails['targetTitle'],
1649                                 $linkDetails['text'],
1650                                 $linkDetails['attribs'],
1651                                 $linkDetails['query'],
1652                                 $linkDetails['options']
1653                         );
1654                 }
1655
1656                 $result .= implode(
1657                         '<span class="mw-editsection-divider">'
1658                                 . wfMessage( 'pipe-separator' )->inLanguage( $lang )->escaped()
1659                                 . '</span>',
1660                         $linksHtml
1661                 );
1662
1663                 $result .= '<span class="mw-editsection-bracket">]</span></span>';
1664                 // Deprecated, use SkinEditSectionLinks hook instead
1665                 Hooks::run(
1666                         'DoEditSectionLink',
1667                         [ $this, $nt, $section, $tooltip, &$result, $lang ],
1668                         '1.25'
1669                 );
1670                 return $result;
1671         }
1672
1673 }