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