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