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