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