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 /**
  24  * @defgroup Skins Skins
  25  */
  26
  27 /**
  28  * The main skin class which provides methods and properties for all other skins.
  29  *
  30  * See docs/skin.txt for more information.
  31  *
  32  * @ingroup Skins
  33  */
  34 abstract class Skin extends ContextSource {
  35         protected $skinname = null;
  36         protected $mRelevantTitle = null;
  37         protected $mRelevantUser = null;
  38
  39         /**
  40          * @var string Stylesheets set to use. Subdirectory in skins/ where various stylesheets are
  41          *   located. Only needs to be set if you intend to use the getSkinStylePath() method.
  42          */
  43         public $stylename = null;
  44
  45         /**
  46          * Fetch the set of available skins.
  47          * @return array Associative array of strings
  48          */
  49         static function getSkinNames() {
  50                 return SkinFactory::getDefaultInstance()->getSkinNames();
  51         }
  52
  53         /**
  54          * Fetch the skinname messages for available skins.
  55          * @return string[]
  56          */
  57         static function getSkinNameMessages() {
  58                 $messages = [];
  59                 foreach ( self::getSkinNames() as $skinKey => $skinName ) {
  60                         $messages[] = "skinname-$skinKey";
  61                 }
  62                 return $messages;
  63         }
  64
  65         /**
  66          * Fetch the list of user-selectable skins in regards to $wgSkipSkins.
  67          * Useful for Special:Preferences and other places where you
  68          * only want to show skins users _can_ use.
  69          * @return string[]
  70          * @since 1.23
  71          */
  72         public static function getAllowedSkins() {
  73                 global $wgSkipSkins;
  74
  75                 $allowedSkins = self::getSkinNames();
  76
  77                 foreach ( $wgSkipSkins as $skip ) {
  78                         unset( $allowedSkins[$skip] );
  79                 }
  80
  81                 return $allowedSkins;
  82         }
  83
  84         /**
  85          * @deprecated since 1.23, use getAllowedSkins
  86          * @return string[]
  87          */
  88         public static function getUsableSkins() {
  89                 wfDeprecated( __METHOD__, '1.23' );
  90                 return self::getAllowedSkins();
  91         }
  92
  93         /**
  94          * Normalize a skin preference value to a form that can be loaded.
  95          *
  96          * If a skin can't be found, it will fall back to the configured default ($wgDefaultSkin), or the
  97          * hardcoded default ($wgFallbackSkin) if the default skin is unavailable too.
  98          *
  99          * @param string $key 'monobook', 'vector', etc.
 100          * @return string
 101          */
 102         static function normalizeKey( $key ) {
 103                 global $wgDefaultSkin, $wgFallbackSkin;
 104
 105                 $skinNames = Skin::getSkinNames();
 106
 107                 // Make keys lowercase for case-insensitive matching.
 108                 $skinNames = array_change_key_case( $skinNames, CASE_LOWER );
 109                 $key = strtolower( $key );
 110                 $defaultSkin = strtolower( $wgDefaultSkin );
 111                 $fallbackSkin = strtolower( $wgFallbackSkin );
 112
 113                 if ( $key == '' || $key == 'default' ) {
 114                         // Don't return the default immediately;
 115                         // in a misconfiguration we need to fall back.
 116                         $key = $defaultSkin;
 117                 }
 118
 119                 if ( isset( $skinNames[$key] ) ) {
 120                         return $key;
 121                 }
 122
 123                 // Older versions of the software used a numeric setting
 124                 // in the user preferences.
 125                 $fallback = [
 126                         0 => $defaultSkin,
 127                         2 => 'cologneblue'
 128                 ];
 129
 130                 if ( isset( $fallback[$key] ) ) {
 131                         $key = $fallback[$key];
 132                 }
 133
 134                 if ( isset( $skinNames[$key] ) ) {
 135                         return $key;
 136                 } elseif ( isset( $skinNames[$defaultSkin] ) ) {
 137                         return $defaultSkin;
 138                 } else {
 139                         return $fallbackSkin;
 140                 }
 141         }
 142
 143         /**
 144          * @return string Skin name
 145          */
 146         public function getSkinName() {
 147                 return $this->skinname;
 148         }
 149
 150         /**
 151          * @param OutputPage $out
 152          */
 153         function initPage( OutputPage $out ) {
 154
 155                 $this->preloadExistence();
 156
 157         }
 158
 159         /**
 160          * Defines the ResourceLoader modules that should be added to the skin
 161          * It is recommended that skins wishing to override call parent::getDefaultModules()
 162          * and substitute out any modules they wish to change by using a key to look them up
 163          * @return array Array of modules with helper keys for easy overriding
 164          */
 165         public function getDefaultModules() {
 166                 global $wgUseAjax, $wgEnableAPI, $wgEnableWriteAPI;
 167
 168                 $out = $this->getOutput();
 169                 $user = $out->getUser();
 170                 $modules = [
 171                         // modules that enhance the page content in some way
 172                         'content' => [
 173                                 'mediawiki.page.ready',
 174                         ],
 175                         // modules that exist for legacy reasons
 176                         'legacy' => ResourceLoaderStartUpModule::getLegacyModules(),
 177                         // modules relating to search functionality
 178                         'search' => [],
 179                         // modules relating to functionality relating to watching an article
 180                         'watch' => [],
 181                         // modules which relate to the current users preferences
 182                         'user' => [],
 183                 ];
 184
 185                 // Add various resources if required
 186                 if ( $wgUseAjax && $wgEnableAPI ) {
 187                         if ( $wgEnableWriteAPI && $user->isLoggedIn()
 188                                 && $user->isAllowedAll( 'writeapi', 'viewmywatchlist', 'editmywatchlist' )
 189                                 && $this->getRelevantTitle()->canExist()
 190                         ) {
 191                                 $modules['watch'][] = 'mediawiki.page.watch.ajax';
 192                         }
 193
 194                         $modules['search'][] = 'mediawiki.searchSuggest';
 195                 }
 196
 197                 if ( $user->getBoolOption( 'editsectiononrightclick' ) ) {
 198                         $modules['user'][] = 'mediawiki.action.view.rightClickEdit';
 199                 }
 200
 201                 // Crazy edit-on-double-click stuff
 202                 if ( $out->isArticle() && $user->getOption( 'editondblclick' ) ) {
 203                         $modules['user'][] = 'mediawiki.action.view.dblClickEdit';
 204                 }
 205                 return $modules;
 206         }
 207
 208         /**
 209          * Preload the existence of three commonly-requested pages in a single query
 210          */
 211         function preloadExistence() {
 212                 $titles = [];
 213
 214                 $user = $this->getUser();
 215                 $title = $this->getRelevantTitle();
 216
 217                 // User/talk link
 218                 if ( $user->isLoggedIn() ) {
 219                         $titles[] = $user->getUserPage();
 220                         $titles[] = $user->getTalkPage();
 221                 }
 222
 223                 // Check, if the page can hold some kind of content, otherwise do nothing
 224                 if ( !$title->canExist() ) {
 225                         // nothing
 226                 } elseif ( $title->isTalkPage() ) {
 227                         $titles[] = $title->getSubjectPage();
 228                 } else {
 229                         $titles[] = $title->getTalkPage();
 230                 }
 231
 232                 Hooks::run( 'SkinPreloadExistence', [ &$titles, $this ] );
 233
 234                 if ( count( $titles ) ) {
 235                         $lb = new LinkBatch( $titles );
 236                         $lb->setCaller( __METHOD__ );
 237                         $lb->execute();
 238                 }
 239         }
 240
 241         /**
 242          * Get the current revision ID
 243          *
 244          * @return int
 245          */
 246         public function getRevisionId() {
 247                 return $this->getOutput()->getRevisionId();
 248         }
 249
 250         /**
 251          * Whether the revision displayed is the latest revision of the page
 252          *
 253          * @return bool
 254          */
 255         public function isRevisionCurrent() {
 256                 $revID = $this->getRevisionId();
 257                 return $revID == 0 || $revID == $this->getTitle()->getLatestRevID();
 258         }
 259
 260         /**
 261          * Set the "relevant" title
 262          * @see self::getRelevantTitle()
 263          * @param Title $t
 264          */
 265         public function setRelevantTitle( $t ) {
 266                 $this->mRelevantTitle = $t;
 267         }
 268
 269         /**
 270          * Return the "relevant" title.
 271          * A "relevant" title is not necessarily the actual title of the page.
 272          * Special pages like Special:MovePage use set the page they are acting on
 273          * as their "relevant" title, this allows the skin system to display things
 274          * such as content tabs which belong to to that page instead of displaying
 275          * a basic special page tab which has almost no meaning.
 276          *
 277          * @return Title
 278          */
 279         public function getRelevantTitle() {
 280                 if ( isset( $this->mRelevantTitle ) ) {
 281                         return $this->mRelevantTitle;
 282                 }
 283                 return $this->getTitle();
 284         }
 285
 286         /**
 287          * Set the "relevant" user
 288          * @see self::getRelevantUser()
 289          * @param User $u
 290          */
 291         public function setRelevantUser( $u ) {
 292                 $this->mRelevantUser = $u;
 293         }
 294
 295         /**
 296          * Return the "relevant" user.
 297          * A "relevant" user is similar to a relevant title. Special pages like
 298          * Special:Contributions mark the user which they are relevant to so that
 299          * things like the toolbox can display the information they usually are only
 300          * able to display on a user's userpage and talkpage.
 301          * @return User
 302          */
 303         public function getRelevantUser() {
 304                 if ( isset( $this->mRelevantUser ) ) {
 305                         return $this->mRelevantUser;
 306                 }
 307                 $title = $this->getRelevantTitle();
 308                 if ( $title->hasSubjectNamespace( NS_USER ) ) {
 309                         $rootUser = $title->getRootText();
 310                         if ( User::isIP( $rootUser ) ) {
 311                                 $this->mRelevantUser = User::newFromName( $rootUser, false );
 312                         } else {
 313                                 $user = User::newFromName( $rootUser, false );
 314
 315                                 if ( $user ) {
 316                                         $user->load( User::READ_NORMAL );
 317
 318                                         if ( $user->isLoggedIn() ) {
 319                                                 $this->mRelevantUser = $user;
 320                                         }
 321                                 }
 322                         }
 323                         return $this->mRelevantUser;
 324                 }
 325                 return null;
 326         }
 327
 328         /**
 329          * Outputs the HTML generated by other functions.
 330          * @param OutputPage $out
 331          */
 332         abstract function outputPage( OutputPage $out = null );
 333
 334         /**
 335          * @param array $data
 336          * @return string
 337          */
 338         static function makeVariablesScript( $data ) {
 339                 if ( $data ) {
 340                         return ResourceLoader::makeInlineScript(
 341                                 ResourceLoader::makeConfigSetScript( $data )
 342                         );
 343                 } else {
 344                         return '';
 345                 }
 346         }
 347
 348         /**
 349          * Get the query to generate a dynamic stylesheet
 350          *
 351          * @return array
 352          */
 353         public static function getDynamicStylesheetQuery() {
 354                 global $wgSquidMaxage;
 355
 356                 return [
 357                                 'action' => 'raw',
 358                                 'maxage' => $wgSquidMaxage,
 359                                 'usemsgcache' => 'yes',
 360                                 'ctype' => 'text/css',
 361                                 'smaxage' => $wgSquidMaxage,
 362                         ];
 363         }
 364
 365         /**
 366          * Add skin specific stylesheets
 367          * Calling this method with an $out of anything but the same OutputPage
 368          * inside ->getOutput() is deprecated. The $out arg is kept
 369          * for compatibility purposes with skins.
 370          * @param OutputPage $out
 371          * @todo delete
 372          */
 373         abstract function setupSkinUserCss( OutputPage $out );
 374
 375         /**
 376          * TODO: document
 377          * @param Title $title
 378          * @return string
 379          */
 380         function getPageClasses( $title ) {
 381                 $numeric = 'ns-' . $title->getNamespace();
 382
 383                 if ( $title->isSpecialPage() ) {
 384                         $type = 'ns-special';
 385                         // bug 23315: provide a class based on the canonical special page name without subpages
 386                         list( $canonicalName ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );
 387                         if ( $canonicalName ) {
 388                                 $type .= ' ' . Sanitizer::escapeClass( "mw-special-$canonicalName" );
 389                         } else {
 390                                 $type .= ' mw-invalidspecialpage';
 391                         }
 392                 } elseif ( $title->isTalkPage() ) {
 393                         $type = 'ns-talk';
 394                 } else {
 395                         $type = 'ns-subject';
 396                 }
 397
 398                 $name = Sanitizer::escapeClass( 'page-' . $title->getPrefixedText() );
 399
 400                 return "$numeric $type $name";
 401         }
 402
 403         /**
 404          * Return values for <html> element
 405          * @return array Array of associative name-to-value elements for <html> element
 406          */
 407         public function getHtmlElementAttributes() {
 408                 $lang = $this->getLanguage();
 409                 return [
 410                         'lang' => $lang->getHtmlCode(),
 411                         'dir' => $lang->getDir(),
 412                         'class' => 'client-nojs',
 413                 ];
 414         }
 415
 416         /**
 417          * This will be called by OutputPage::headElement when it is creating the
 418          * "<body>" tag, skins can override it if they have a need to add in any
 419          * body attributes or classes of their own.
 420          * @param OutputPage $out
 421          * @param array $bodyAttrs
 422          */
 423         function addToBodyAttributes( $out, &$bodyAttrs ) {
 424                 // does nothing by default
 425         }
 426
 427         /**
 428          * URL to the logo
 429          * @return string
 430          */
 431         function getLogo() {
 432                 global $wgLogo;
 433                 return $wgLogo;
 434         }
 435
 436         /**
 437          * @return string HTML
 438          */
 439         function getCategoryLinks() {
 440                 global $wgUseCategoryBrowser;
 441
 442                 $out = $this->getOutput();
 443                 $allCats = $out->getCategoryLinks();
 444
 445                 if ( !count( $allCats ) ) {
 446                         return '';
 447                 }
 448
 449                 $embed = "<li>";
 450                 $pop = "</li>";
 451
 452                 $s = '';
 453                 $colon = $this->msg( 'colon-separator' )->escaped();
 454
 455                 if ( !empty( $allCats['normal'] ) ) {
 456                         $t = $embed . implode( "{$pop}{$embed}", $allCats['normal'] ) . $pop;
 457
 458                         $msg = $this->msg( 'pagecategories' )->numParams( count( $allCats['normal'] ) )->escaped();
 459                         $linkPage = wfMessage( 'pagecategorieslink' )->inContentLanguage()->text();
 460                         $title = Title::newFromText( $linkPage );
 461                         $link = $title ? Linker::link( $title, $msg ) : $msg;
 462                         $s .= '<div id="mw-normal-catlinks" class="mw-normal-catlinks">' .
 463                                 $link . $colon . '<ul>' . $t . '</ul>' . '</div>';
 464                 }
 465
 466                 # Hidden categories
 467                 if ( isset( $allCats['hidden'] ) ) {
 468                         if ( $this->getUser()->getBoolOption( 'showhiddencats' ) ) {
 469                                 $class = ' mw-hidden-cats-user-shown';
 470                         } elseif ( $this->getTitle()->getNamespace() == NS_CATEGORY ) {
 471                                 $class = ' mw-hidden-cats-ns-shown';
 472                         } else {
 473                                 $class = ' mw-hidden-cats-hidden';
 474                         }
 475
 476                         $s .= "<div id=\"mw-hidden-catlinks\" class=\"mw-hidden-catlinks$class\">" .
 477                                 $this->msg( 'hidden-categories' )->numParams( count( $allCats['hidden'] ) )->escaped() .
 478                                 $colon . '<ul>' . $embed . implode( "{$pop}{$embed}", $allCats['hidden'] ) . $pop . '</ul>' .
 479                                 '</div>';
 480                 }
 481
 482                 # optional 'dmoz-like' category browser. Will be shown under the list
 483                 # of categories an article belong to
 484                 if ( $wgUseCategoryBrowser ) {
 485                         $s .= '<br /><hr />';
 486
 487                         # get a big array of the parents tree
 488                         $parenttree = $this->getTitle()->getParentCategoryTree();
 489                         # Skin object passed by reference cause it can not be
 490                         # accessed under the method subfunction drawCategoryBrowser
 491                         $tempout = explode( "\n", $this->drawCategoryBrowser( $parenttree ) );
 492                         # Clean out bogus first entry and sort them
 493                         unset( $tempout[0] );
 494                         asort( $tempout );
 495                         # Output one per line
 496                         $s .= implode( "<br />\n", $tempout );
 497                 }
 498
 499                 return $s;
 500         }
 501
 502         /**
 503          * Render the array as a series of links.
 504          * @param array $tree Categories tree returned by Title::getParentCategoryTree
 505          * @return string Separated by &gt;, terminate with "\n"
 506          */
 507         function drawCategoryBrowser( $tree ) {
 508                 $return = '';
 509
 510                 foreach ( $tree as $element => $parent ) {
 511                         if ( empty( $parent ) ) {
 512                                 # element start a new list
 513                                 $return .= "\n";
 514                         } else {
 515                                 # grab the others elements
 516                                 $return .= $this->drawCategoryBrowser( $parent ) . ' &gt; ';
 517                         }
 518
 519                         # add our current element to the list
 520                         $eltitle = Title::newFromText( $element );
 521                         $return .= Linker::link( $eltitle, htmlspecialchars( $eltitle->getText() ) );
 522                 }
 523
 524                 return $return;
 525         }
 526
 527         /**
 528          * @return string HTML
 529          */
 530         function getCategories() {
 531                 $out = $this->getOutput();
 532                 $catlinks = $this->getCategoryLinks();
 533
 534                 // Check what we're showing
 535                 $allCats = $out->getCategoryLinks();
 536                 $showHidden = $this->getUser()->getBoolOption( 'showhiddencats' ) ||
 537                                                 $this->getTitle()->getNamespace() == NS_CATEGORY;
 538
 539                 $classes = [ 'catlinks' ];
 540                 if ( empty( $allCats['normal'] ) && !( !empty( $allCats['hidden'] ) && $showHidden ) ) {
 541                         $classes[] = 'catlinks-allhidden';
 542                 }
 543
 544                 return Html::rawElement(
 545                         'div',
 546                         [ 'id' => 'catlinks', 'class' => $classes, 'data-mw' => 'interface' ],
 547                         $catlinks
 548                 );
 549         }
 550
 551         /**
 552          * This runs a hook to allow extensions placing their stuff after content
 553          * and article metadata (e.g. categories).
 554          * Note: This function has nothing to do with afterContent().
 555          *
 556          * This hook is placed here in order to allow using the same hook for all
 557          * skins, both the SkinTemplate based ones and the older ones, which directly
 558          * use this class to get their data.
 559          *
 560          * The output of this function gets processed in SkinTemplate::outputPage() for
 561          * the SkinTemplate based skins, all other skins should directly echo it.
 562          *
 563          * @return string Empty by default, if not changed by any hook function.
 564          */
 565         protected function afterContentHook() {
 566                 $data = '';
 567
 568                 if ( Hooks::run( 'SkinAfterContent', [ &$data, $this ] ) ) {
 569                         // adding just some spaces shouldn't toggle the output
 570                         // of the whole <div/>, so we use trim() here
 571                         if ( trim( $data ) != '' ) {
 572                                 // Doing this here instead of in the skins to
 573                                 // ensure that the div has the same ID in all
 574                                 // skins
 575                                 $data = "<div id='mw-data-after-content'>\n" .
 576                                         "\t$data\n" .
 577                                         "</div>\n";
 578                         }
 579                 } else {
 580                         wfDebug( "Hook SkinAfterContent changed output processing.\n" );
 581                 }
 582
 583                 return $data;
 584         }
 585
 586         /**
 587          * Generate debug data HTML for displaying at the bottom of the main content
 588          * area.
 589          * @return string HTML containing debug data, if enabled (otherwise empty).
 590          */
 591         protected function generateDebugHTML() {
 592                 return MWDebug::getHTMLDebugLog();
 593         }
 594
 595         /**
 596          * This gets called shortly before the "</body>" tag.
 597          *
 598          * @return string HTML-wrapped JS code to be put before "</body>"
 599          */
 600         function bottomScripts() {
 601                 // TODO and the suckage continues. This function is really just a wrapper around
 602                 // OutputPage::getBottomScripts() which takes a Skin param. This should be cleaned
 603                 // up at some point
 604                 $bottomScriptText = $this->getOutput()->getBottomScripts();
 605                 Hooks::run( 'SkinAfterBottomScripts', [ $this, &$bottomScriptText ] );
 606
 607                 return $bottomScriptText;
 608         }
 609
 610         /**
 611          * Text with the permalink to the source page,
 612          * usually shown on the footer of a printed page
 613          *
 614          * @return string HTML text with an URL
 615          */
 616         function printSource() {
 617                 $oldid = $this->getRevisionId();
 618                 if ( $oldid ) {
 619                         $canonicalUrl = $this->getTitle()->getCanonicalURL( 'oldid=' . $oldid );
 620                         $url = htmlspecialchars( wfExpandIRI( $canonicalUrl ) );
 621                 } else {
 622                         // oldid not available for non existing pages
 623                         $url = htmlspecialchars( wfExpandIRI( $this->getTitle()->getCanonicalURL() ) );
 624                 }
 625
 626                 return $this->msg( 'retrievedfrom' )
 627                         ->rawParams( '<a dir="ltr" href="' . $url . '">' . $url . '</a>' )
 628                         ->parse();
 629         }
 630
 631         /**
 632          * @return string HTML
 633          */
 634         function getUndeleteLink() {
 635                 $action = $this->getRequest()->getVal( 'action', 'view' );
 636
 637                 if ( $this->getTitle()->userCan( 'deletedhistory', $this->getUser() ) &&
 638                         ( !$this->getTitle()->exists() || $action == 'history' ) ) {
 639                         $n = $this->getTitle()->isDeleted();
 640
 641                         if ( $n ) {
 642                                 if ( $this->getTitle()->quickUserCan( 'undelete', $this->getUser() ) ) {
 643                                         $msg = 'thisisdeleted';
 644                                 } else {
 645                                         $msg = 'viewdeleted';
 646                                 }
 647
 648                                 return $this->msg( $msg )->rawParams(
 649                                         Linker::linkKnown(
 650                                                 SpecialPage::getTitleFor( 'Undelete', $this->getTitle()->getPrefixedDBkey() ),
 651                                                 $this->msg( 'restorelink' )->numParams( $n )->escaped() )
 652                                         )->escaped();
 653                         }
 654                 }
 655
 656                 return '';
 657         }
 658
 659         /**
 660          * @return string
 661          */
 662         function subPageSubtitle() {
 663                 $out = $this->getOutput();
 664                 $subpages = '';
 665
 666                 if ( !Hooks::run( 'SkinSubPageSubtitle', [ &$subpages, $this, $out ] ) ) {
 667                         return $subpages;
 668                 }
 669
 670                 if ( $out->isArticle() && MWNamespace::hasSubpages( $out->getTitle()->getNamespace() ) ) {
 671                         $ptext = $this->getTitle()->getPrefixedText();
 672                         if ( preg_match( '/\//', $ptext ) ) {
 673                                 $links = explode( '/', $ptext );
 674                                 array_pop( $links );
 675                                 $c = 0;
 676                                 $growinglink = '';
 677                                 $display = '';
 678                                 $lang = $this->getLanguage();
 679
 680                                 foreach ( $links as $link ) {
 681                                         $growinglink .= $link;
 682                                         $display .= $link;
 683                                         $linkObj = Title::newFromText( $growinglink );
 684
 685                                         if ( is_object( $linkObj ) && $linkObj->isKnown() ) {
 686                                                 $getlink = Linker::linkKnown(
 687                                                         $linkObj,
 688                                                         htmlspecialchars( $display )
 689                                                 );
 690
 691                                                 $c++;
 692
 693                                                 if ( $c > 1 ) {
 694                                                         $subpages .= $lang->getDirMarkEntity() . $this->msg( 'pipe-separator' )->escaped();
 695                                                 } else {
 696                                                         $subpages .= '&lt; ';
 697                                                 }
 698
 699                                                 $subpages .= $getlink;
 700                                                 $display = '';
 701                                         } else {
 702                                                 $display .= '/';
 703                                         }
 704                                         $growinglink .= '/';
 705                                 }
 706                         }
 707                 }
 708
 709                 return $subpages;
 710         }
 711
 712         /**
 713          * @deprecated since 1.27, feature removed
 714          * @return bool Always false
 715          */
 716         function showIPinHeader() {
 717                 wfDeprecated( __METHOD__, '1.27' );
 718                 return false;
 719         }
 720
 721         /**
 722          * @return string
 723          */
 724         function getSearchLink() {
 725                 $searchPage = SpecialPage::getTitleFor( 'Search' );
 726                 return $searchPage->getLocalURL();
 727         }
 728
 729         /**
 730          * @return string
 731          */
 732         function escapeSearchLink() {
 733                 return htmlspecialchars( $this->getSearchLink() );
 734         }
 735
 736         /**
 737          * @param string $type
 738          * @return string
 739          */
 740         function getCopyright( $type = 'detect' ) {
 741                 global $wgRightsPage, $wgRightsUrl, $wgRightsText;
 742
 743                 if ( $type == 'detect' ) {
 744                         if ( !$this->isRevisionCurrent()
 745                                 && !$this->msg( 'history_copyright' )->inContentLanguage()->isDisabled()
 746                         ) {
 747                                 $type = 'history';
 748                         } else {
 749                                 $type = 'normal';
 750                         }
 751                 }
 752
 753                 if ( $type == 'history' ) {
 754                         $msg = 'history_copyright';
 755                 } else {
 756                         $msg = 'copyright';
 757                 }
 758
 759                 if ( $wgRightsPage ) {
 760                         $title = Title::newFromText( $wgRightsPage );
 761                         $link = Linker::linkKnown( $title, $wgRightsText );
 762                 } elseif ( $wgRightsUrl ) {
 763                         $link = Linker::makeExternalLink( $wgRightsUrl, $wgRightsText );
 764                 } elseif ( $wgRightsText ) {
 765                         $link = $wgRightsText;
 766                 } else {
 767                         # Give up now
 768                         return '';
 769                 }
 770
 771                 // Allow for site and per-namespace customization of copyright notice.
 772                 // @todo Remove deprecated $forContent param from hook handlers and then remove here.
 773                 $forContent = true;
 774
 775                 Hooks::run(
 776                         'SkinCopyrightFooter',
 777                         [ $this->getTitle(), $type, &$msg, &$link, &$forContent ]
 778                 );
 779
 780                 return $this->msg( $msg )->rawParams( $link )->text();
 781         }
 782
 783         /**
 784          * @return null|string
 785          */
 786         function getCopyrightIcon() {
 787                 global $wgRightsUrl, $wgRightsText, $wgRightsIcon, $wgFooterIcons;
 788
 789                 $out = '';
 790
 791                 if ( $wgFooterIcons['copyright']['copyright'] ) {
 792                         $out = $wgFooterIcons['copyright']['copyright'];
 793                 } elseif ( $wgRightsIcon ) {
 794                         $icon = htmlspecialchars( $wgRightsIcon );
 795
 796                         if ( $wgRightsUrl ) {
 797                                 $url = htmlspecialchars( $wgRightsUrl );
 798                                 $out .= '<a href="' . $url . '">';
 799                         }
 800
 801                         $text = htmlspecialchars( $wgRightsText );
 802                         $out .= "<img src=\"$icon\" alt=\"$text\" width=\"88\" height=\"31\" />";
 803
 804                         if ( $wgRightsUrl ) {
 805                                 $out .= '</a>';
 806                         }
 807                 }
 808
 809                 return $out;
 810         }
 811
 812         /**
 813          * Gets the powered by MediaWiki icon.
 814          * @return string
 815          */
 816         function getPoweredBy() {
 817                 global $wgResourceBasePath;
 818
 819                 $url1 = htmlspecialchars(
 820                         "$wgResourceBasePath/resources/assets/poweredby_mediawiki_88x31.png"
 821                 );
 822                 $url1_5 = htmlspecialchars(
 823                         "$wgResourceBasePath/resources/assets/poweredby_mediawiki_132x47.png"
 824                 );
 825                 $url2 = htmlspecialchars(
 826                         "$wgResourceBasePath/resources/assets/poweredby_mediawiki_176x62.png"
 827                 );
 828                 $text = '<a href="//www.mediawiki.org/"><img src="' . $url1
 829                         . '" srcset="' . $url1_5 . ' 1.5x, ' . $url2 . ' 2x" '
 830                         . 'height="31" width="88" alt="Powered by MediaWiki" /></a>';
 831                 Hooks::run( 'SkinGetPoweredBy', [ &$text, $this ] );
 832                 return $text;
 833         }
 834
 835         /**
 836          * Get the timestamp of the latest revision, formatted in user language
 837          *
 838          * @return string
 839          */
 840         protected function lastModified() {
 841                 $timestamp = $this->getOutput()->getRevisionTimestamp();
 842
 843                 # No cached timestamp, load it from the database
 844                 if ( $timestamp === null ) {
 845                         $timestamp = Revision::getTimestampFromId( $this->getTitle(), $this->getRevisionId() );
 846                 }
 847
 848                 if ( $timestamp ) {
 849                         $d = $this->getLanguage()->userDate( $timestamp, $this->getUser() );
 850                         $t = $this->getLanguage()->userTime( $timestamp, $this->getUser() );
 851                         $s = ' ' . $this->msg( 'lastmodifiedat', $d, $t )->parse();
 852                 } else {
 853                         $s = '';
 854                 }
 855
 856                 if ( wfGetLB()->getLaggedSlaveMode() ) {
 857                         $s .= ' <strong>' . $this->msg( 'laggedslavemode' )->parse() . '</strong>';
 858                 }
 859
 860                 return $s;
 861         }
 862
 863         /**
 864          * @param string $align
 865          * @return string
 866          */
 867         function logoText( $align = '' ) {
 868                 if ( $align != '' ) {
 869                         $a = " style='float: {$align};'";
 870                 } else {
 871                         $a = '';
 872                 }
 873
 874                 $mp = $this->msg( 'mainpage' )->escaped();
 875                 $mptitle = Title::newMainPage();
 876                 $url = ( is_object( $mptitle ) ? htmlspecialchars( $mptitle->getLocalURL() ) : '' );
 877
 878                 $logourl = $this->getLogo();
 879                 $s = "<a href='{$url}'><img{$a} src='{$logourl}' alt='[{$mp}]' /></a>";
 880
 881                 return $s;
 882         }
 883
 884         /**
 885          * Renders a $wgFooterIcons icon according to the method's arguments
 886          * @param array $icon The icon to build the html for, see $wgFooterIcons
 887          *   for the format of this array.
 888          * @param bool|string $withImage Whether to use the icon's image or output
 889          *   a text-only footericon.
 890          * @return string HTML
 891          */
 892         function makeFooterIcon( $icon, $withImage = 'withImage' ) {
 893                 if ( is_string( $icon ) ) {
 894                         $html = $icon;
 895                 } else { // Assuming array
 896                         $url = isset( $icon["url"] ) ? $icon["url"] : null;
 897                         unset( $icon["url"] );
 898                         if ( isset( $icon["src"] ) && $withImage === 'withImage' ) {
 899                                 // do this the lazy way, just pass icon data as an attribute array
 900                                 $html = Html::element( 'img', $icon );
 901                         } else {
 902                                 $html = htmlspecialchars( $icon["alt"] );
 903                         }
 904                         if ( $url ) {
 905                                 $html = Html::rawElement( 'a', [ "href" => $url ], $html );
 906                         }
 907                 }
 908                 return $html;
 909         }
 910
 911         /**
 912          * Gets the link to the wiki's main page.
 913          * @return string
 914          */
 915         function mainPageLink() {
 916                 $s = Linker::linkKnown(
 917                         Title::newMainPage(),
 918                         $this->msg( 'mainpage' )->escaped()
 919                 );
 920
 921                 return $s;
 922         }
 923
 924         /**
 925          * Returns an HTML link for use in the footer
 926          * @param string $desc The i18n message key for the link text
 927          * @param string $page The i18n message key for the page to link to
 928          * @return string HTML anchor
 929          */
 930         public function footerLink( $desc, $page ) {
 931                 // if the link description has been set to "-" in the default language,
 932                 if ( $this->msg( $desc )->inContentLanguage()->isDisabled() ) {
 933                         // then it is disabled, for all languages.
 934                         return '';
 935                 } else {
 936                         // Otherwise, we display the link for the user, described in their
 937                         // language (which may or may not be the same as the default language),
 938                         // but we make the link target be the one site-wide page.
 939                         $title = Title::newFromText( $this->msg( $page )->inContentLanguage()->text() );
 940
 941                         if ( !$title ) {
 942                                 return '';
 943                         }
 944
 945                         return Linker::linkKnown(
 946                                 $title,
 947                                 $this->msg( $desc )->escaped()
 948                         );
 949                 }
 950         }
 951
 952         /**
 953          * Gets the link to the wiki's privacy policy page.
 954          * @return string HTML
 955          */
 956         function privacyLink() {
 957                 return $this->footerLink( 'privacy', 'privacypage' );
 958         }
 959
 960         /**
 961          * Gets the link to the wiki's about page.
 962          * @return string HTML
 963          */
 964         function aboutLink() {
 965                 return $this->footerLink( 'aboutsite', 'aboutpage' );
 966         }
 967
 968         /**
 969          * Gets the link to the wiki's general disclaimers page.
 970          * @return string HTML
 971          */
 972         function disclaimerLink() {
 973                 return $this->footerLink( 'disclaimers', 'disclaimerpage' );
 974         }
 975
 976         /**
 977          * Return URL options for the 'edit page' link.
 978          * This may include an 'oldid' specifier, if the current page view is such.
 979          *
 980          * @return array
 981          * @private
 982          */
 983         function editUrlOptions() {
 984                 $options = [ 'action' => 'edit' ];
 985
 986                 if ( !$this->isRevisionCurrent() ) {
 987                         $options['oldid'] = intval( $this->getRevisionId() );
 988                 }
 989
 990                 return $options;
 991         }
 992
 993         /**
 994          * @param User|int $id
 995          * @return bool
 996          */
 997         function showEmailUser( $id ) {
 998                 if ( $id instanceof User ) {
 999                         $targetUser = $id;
1000                 } else {
1001                         $targetUser = User::newFromId( $id );
1002                 }
1003
1004                 # The sending user must have a confirmed email address and the target
1005                 # user must have a confirmed email address and allow emails from users.
1006                 return $this->getUser()->canSendEmail() &&
1007                         $targetUser->canReceiveEmail();
1008         }
1009
1010         /**
1011          * Return a fully resolved style path url to images or styles stored in the current skins's folder.
1012          * This method returns a url resolved using the configured skin style path
1013          * and includes the style version inside of the url.
1014          *
1015          * Requires $stylename to be set, otherwise throws MWException.
1016          *
1017          * @param string $name The name or path of a skin resource file
1018          * @return string The fully resolved style path url including styleversion
1019          * @throws MWException
1020          */
1021         function getSkinStylePath( $name ) {
1022                 global $wgStylePath, $wgStyleVersion;
1023
1024                 if ( $this->stylename === null ) {
1025                         $class = get_class( $this );
1026                         throw new MWException( "$class::\$stylename must be set to use getSkinStylePath()" );
1027                 }
1028
1029                 return "$wgStylePath/{$this->stylename}/$name?$wgStyleVersion";
1030         }
1031
1032         /* these are used extensively in SkinTemplate, but also some other places */
1033
1034         /**
1035          * @param string $urlaction
1036          * @return string
1037          */
1038         static function makeMainPageUrl( $urlaction = '' ) {
1039                 $title = Title::newMainPage();
1040                 self::checkTitle( $title, '' );
1041
1042                 return $title->getLocalURL( $urlaction );
1043         }
1044
1045         /**
1046          * Make a URL for a Special Page using the given query and protocol.
1047          *
1048          * If $proto is set to null, make a local URL. Otherwise, make a full
1049          * URL with the protocol specified.
1050          *
1051          * @param string $name Name of the Special page
1052          * @param string $urlaction Query to append
1053          * @param string|null $proto Protocol to use or null for a local URL
1054          * @return string
1055          */
1056         static function makeSpecialUrl( $name, $urlaction = '', $proto = null ) {
1057                 $title = SpecialPage::getSafeTitleFor( $name );
1058                 if ( is_null( $proto ) ) {
1059                         return $title->getLocalURL( $urlaction );
1060                 } else {
1061                         return $title->getFullURL( $urlaction, false, $proto );
1062                 }
1063         }
1064
1065         /**
1066          * @param string $name
1067          * @param string $subpage
1068          * @param string $urlaction
1069          * @return string
1070          */
1071         static function makeSpecialUrlSubpage( $name, $subpage, $urlaction = '' ) {
1072                 $title = SpecialPage::getSafeTitleFor( $name, $subpage );
1073                 return $title->getLocalURL( $urlaction );
1074         }
1075
1076         /**
1077          * @param string $name
1078          * @param string $urlaction
1079          * @return string
1080          */
1081         static function makeI18nUrl( $name, $urlaction = '' ) {
1082                 $title = Title::newFromText( wfMessage( $name )->inContentLanguage()->text() );
1083                 self::checkTitle( $title, $name );
1084                 return $title->getLocalURL( $urlaction );
1085         }
1086
1087         /**
1088          * @param string $name
1089          * @param string $urlaction
1090          * @return string
1091          */
1092         static function makeUrl( $name, $urlaction = '' ) {
1093                 $title = Title::newFromText( $name );
1094                 self::checkTitle( $title, $name );
1095
1096                 return $title->getLocalURL( $urlaction );
1097         }
1098
1099         /**
1100          * If url string starts with http, consider as external URL, else
1101          * internal
1102          * @param string $name
1103          * @return string URL
1104          */
1105         static function makeInternalOrExternalUrl( $name ) {
1106                 if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $name ) ) {
1107                         return $name;
1108                 } else {
1109                         return self::makeUrl( $name );
1110                 }
1111         }
1112
1113         /**
1114          * this can be passed the NS number as defined in Language.php
1115          * @param string $name
1116          * @param string $urlaction
1117          * @param int $namespace
1118          * @return string
1119          */
1120         static function makeNSUrl( $name, $urlaction = '', $namespace = NS_MAIN ) {
1121                 $title = Title::makeTitleSafe( $namespace, $name );
1122                 self::checkTitle( $title, $name );
1123
1124                 return $title->getLocalURL( $urlaction );
1125         }
1126
1127         /**
1128          * these return an array with the 'href' and boolean 'exists'
1129          * @param string $name
1130          * @param string $urlaction
1131          * @return array
1132          */
1133         static function makeUrlDetails( $name, $urlaction = '' ) {
1134                 $title = Title::newFromText( $name );
1135                 self::checkTitle( $title, $name );
1136
1137                 return [
1138                         'href' => $title->getLocalURL( $urlaction ),
1139                         'exists' => $title->isKnown(),
1140                 ];
1141         }
1142
1143         /**
1144          * Make URL details where the article exists (or at least it's convenient to think so)
1145          * @param string $name Article name
1146          * @param string $urlaction
1147          * @return array
1148          */
1149         static function makeKnownUrlDetails( $name, $urlaction = '' ) {
1150                 $title = Title::newFromText( $name );
1151                 self::checkTitle( $title, $name );
1152
1153                 return [
1154                         'href' => $title->getLocalURL( $urlaction ),
1155                         'exists' => true
1156                 ];
1157         }
1158
1159         /**
1160          * make sure we have some title to operate on
1161          *
1162          * @param Title $title
1163          * @param string $name
1164          */
1165         static function checkTitle( &$title, $name ) {
1166                 if ( !is_object( $title ) ) {
1167                         $title = Title::newFromText( $name );
1168                         if ( !is_object( $title ) ) {
1169                                 $title = Title::newFromText( '--error: link target missing--' );
1170                         }
1171                 }
1172         }
1173
1174         /**
1175          * Build an array that represents the sidebar(s), the navigation bar among them.
1176          *
1177          * BaseTemplate::getSidebar can be used to simplify the format and id generation in new skins.
1178          *
1179          * The format of the returned array is array( heading => content, ... ), where:
1180          * - heading is the heading of a navigation portlet. It is either:
1181          *   - magic string to be handled by the skins ('SEARCH' / 'LANGUAGES' / 'TOOLBOX' / ...)
1182          *   - a message name (e.g. 'navigation'), the message should be HTML-escaped by the skin
1183          *   - plain text, which should be HTML-escaped by the skin
1184          * - content is the contents of the portlet. It is either:
1185          *   - HTML text (<ul><li>...</li>...</ul>)
1186          *   - array of link data in a format accepted by BaseTemplate::makeListItem()
1187          *   - (for a magic string as a key, any value)
1188          *
1189          * Note that extensions can control the sidebar contents using the SkinBuildSidebar hook
1190          * and can technically insert anything in here; skin creators are expected to handle
1191          * values described above.
1192          *
1193          * @return array
1194          */
1195         function buildSidebar() {
1196                 global $wgEnableSidebarCache, $wgSidebarCacheExpiry;
1197
1198                 $that = $this;
1199                 $callback = function () use ( $that ) {
1200                         $bar = [];
1201                         $that->addToSidebar( $bar, 'sidebar' );
1202                         Hooks::run( 'SkinBuildSidebar', [ $that, &$bar ] );
1203
1204                         return $bar;
1205                 };
1206
1207                 if ( $wgEnableSidebarCache ) {
1208                         $cache = ObjectCache::getMainWANInstance();
1209                         $sidebar = $cache->getWithSetCallback(
1210                                 $cache->makeKey( 'sidebar', $this->getLanguage()->getCode() ),
1211                                 $wgSidebarCacheExpiry,
1212                                 $callback,
1213                                 [ 'lockTSE' => 30 ]
1214                         );
1215                 } else {
1216                         $sidebar = $callback();
1217                 }
1218
1219                 // Apply post-processing to the cached value
1220                 Hooks::run( 'SidebarBeforeOutput', [ $this, &$sidebar ] );
1221
1222                 return $sidebar;
1223         }
1224
1225         /**
1226          * Add content from a sidebar system message
1227          * Currently only used for MediaWiki:Sidebar (but may be used by Extensions)
1228          *
1229          * This is just a wrapper around addToSidebarPlain() for backwards compatibility
1230          *
1231          * @param array $bar
1232          * @param string $message
1233          */
1234         public function addToSidebar( &$bar, $message ) {
1235                 $this->addToSidebarPlain( $bar, wfMessage( $message )->inContentLanguage()->plain() );
1236         }
1237
1238         /**
1239          * Add content from plain text
1240          * @since 1.17
1241          * @param array $bar
1242          * @param string $text
1243          * @return array
1244          */
1245         function addToSidebarPlain( &$bar, $text ) {
1246                 $lines = explode( "\n", $text );
1247
1248                 $heading = '';
1249
1250                 foreach ( $lines as $line ) {
1251                         if ( strpos( $line, '*' ) !== 0 ) {
1252                                 continue;
1253                         }
1254                         $line = rtrim( $line, "\r" ); // for Windows compat
1255
1256                         if ( strpos( $line, '**' ) !== 0 ) {
1257                                 $heading = trim( $line, '* ' );
1258                                 if ( !array_key_exists( $heading, $bar ) ) {
1259                                         $bar[$heading] = [];
1260                                 }
1261                         } else {
1262                                 $line = trim( $line, '* ' );
1263
1264                                 if ( strpos( $line, '|' ) !== false ) { // sanity check
1265                                         $line = MessageCache::singleton()->transform( $line, false, null, $this->getTitle() );
1266                                         $line = array_map( 'trim', explode( '|', $line, 2 ) );
1267                                         if ( count( $line ) !== 2 ) {
1268                                                 // Second sanity check, could be hit by people doing
1269                                                 // funky stuff with parserfuncs... (bug 33321)
1270                                                 continue;
1271                                         }
1272
1273                                         $extraAttribs = [];
1274
1275                                         $msgLink = $this->msg( $line[0] )->inContentLanguage();
1276                                         if ( $msgLink->exists() ) {
1277                                                 $link = $msgLink->text();
1278                                                 if ( $link == '-' ) {
1279                                                         continue;
1280                                                 }
1281                                         } else {
1282                                                 $link = $line[0];
1283                                         }
1284                                         $msgText = $this->msg( $line[1] );
1285                                         if ( $msgText->exists() ) {
1286                                                 $text = $msgText->text();
1287                                         } else {
1288                                                 $text = $line[1];
1289                                         }
1290
1291                                         if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $link ) ) {
1292                                                 $href = $link;
1293
1294                                                 // Parser::getExternalLinkAttribs won't work here because of the Namespace things
1295                                                 global $wgNoFollowLinks, $wgNoFollowDomainExceptions;
1296                                                 if ( $wgNoFollowLinks && !wfMatchesDomainList( $href, $wgNoFollowDomainExceptions ) ) {
1297                                                         $extraAttribs['rel'] = 'nofollow';
1298                                                 }
1299
1300                                                 global $wgExternalLinkTarget;
1301                                                 if ( $wgExternalLinkTarget ) {
1302                                                         $extraAttribs['target'] = $wgExternalLinkTarget;
1303                                                 }
1304                                         } else {
1305                                                 $title = Title::newFromText( $link );
1306
1307                                                 if ( $title ) {
1308                                                         $title = $title->fixSpecialName();
1309                                                         $href = $title->getLinkURL();
1310                                                 } else {
1311                                                         $href = 'INVALID-TITLE';
1312                                                 }
1313                                         }
1314
1315                                         $bar[$heading][] = array_merge( [
1316                                                 'text' => $text,
1317                                                 'href' => $href,
1318                                                 'id' => 'n-' . Sanitizer::escapeId( strtr( $line[1], ' ', '-' ), 'noninitial' ),
1319                                                 'active' => false
1320                                         ], $extraAttribs );
1321                                 } else {
1322                                         continue;
1323                                 }
1324                         }
1325                 }
1326
1327                 return $bar;
1328         }
1329
1330         /**
1331          * Gets new talk page messages for the current user and returns an
1332          * appropriate alert message (or an empty string if there are no messages)
1333          * @return string
1334          */
1335         function getNewtalks() {
1336
1337                 $newMessagesAlert = '';
1338                 $user = $this->getUser();
1339                 $newtalks = $user->getNewMessageLinks();
1340                 $out = $this->getOutput();
1341
1342                 // Allow extensions to disable or modify the new messages alert
1343                 if ( !Hooks::run( 'GetNewMessagesAlert', [ &$newMessagesAlert, $newtalks, $user, $out ] ) ) {
1344                         return '';
1345                 }
1346                 if ( $newMessagesAlert ) {
1347                         return $newMessagesAlert;
1348                 }
1349
1350                 if ( count( $newtalks ) == 1 && $newtalks[0]['wiki'] === wfWikiID() ) {
1351                         $uTalkTitle = $user->getTalkPage();
1352                         $lastSeenRev = isset( $newtalks[0]['rev'] ) ? $newtalks[0]['rev'] : null;
1353                         $nofAuthors = 0;
1354                         if ( $lastSeenRev !== null ) {
1355                                 $plural = true; // Default if we have a last seen revision: if unknown, use plural
1356                                 $latestRev = Revision::newFromTitle( $uTalkTitle, false, Revision::READ_NORMAL );
1357                                 if ( $latestRev !== null ) {
1358                                         // Singular if only 1 unseen revision, plural if several unseen revisions.
1359                                         $plural = $latestRev->getParentId() !== $lastSeenRev->getId();
1360                                         $nofAuthors = $uTalkTitle->countAuthorsBetween(
1361                                                 $lastSeenRev, $latestRev, 10, 'include_new' );
1362                                 }
1363                         } else {
1364                                 // Singular if no revision -> diff link will show latest change only in any case
1365                                 $plural = false;
1366                         }
1367                         $plural = $plural ? 999 : 1;
1368                         // 999 signifies "more than one revision". We don't know how many, and even if we did,
1369                         // the number of revisions or authors is not necessarily the same as the number of
1370                         // "messages".
1371                         $newMessagesLink = Linker::linkKnown(
1372                                 $uTalkTitle,
1373                                 $this->msg( 'newmessageslinkplural' )->params( $plural )->escaped(),
1374                                 [],
1375                                 [ 'redirect' => 'no' ]
1376                         );
1377
1378                         $newMessagesDiffLink = Linker::linkKnown(
1379                                 $uTalkTitle,
1380                                 $this->msg( 'newmessagesdifflinkplural' )->params( $plural )->escaped(),
1381                                 [],
1382                                 $lastSeenRev !== null
1383                                         ? [ 'oldid' => $lastSeenRev->getId(), 'diff' => 'cur' ]
1384                                         : [ 'diff' => 'cur' ]
1385                         );
1386
1387                         if ( $nofAuthors >= 1 && $nofAuthors <= 10 ) {
1388                                 $newMessagesAlert = $this->msg(
1389                                         'youhavenewmessagesfromusers',
1390                                         $newMessagesLink,
1391                                         $newMessagesDiffLink
1392                                 )->numParams( $nofAuthors, $plural );
1393                         } else {
1394                                 // $nofAuthors === 11 signifies "11 or more" ("more than 10")
1395                                 $newMessagesAlert = $this->msg(
1396                                         $nofAuthors > 10 ? 'youhavenewmessagesmanyusers' : 'youhavenewmessages',
1397                                         $newMessagesLink,
1398                                         $newMessagesDiffLink
1399                                 )->numParams( $plural );
1400                         }
1401                         $newMessagesAlert = $newMessagesAlert->text();
1402                         # Disable CDN cache
1403                         $out->setCdnMaxage( 0 );
1404                 } elseif ( count( $newtalks ) ) {
1405                         $sep = $this->msg( 'newtalkseparator' )->escaped();
1406                         $msgs = [];
1407
1408                         foreach ( $newtalks as $newtalk ) {
1409                                 $msgs[] = Xml::element(
1410                                         'a',
1411                                         [ 'href' => $newtalk['link'] ], $newtalk['wiki']
1412                                 );
1413                         }
1414                         $parts = implode( $sep, $msgs );
1415                         $newMessagesAlert = $this->msg( 'youhavenewmessagesmulti' )->rawParams( $parts )->escaped();
1416                         $out->setCdnMaxage( 0 );
1417                 }
1418
1419                 return $newMessagesAlert;
1420         }
1421
1422         /**
1423          * Get a cached notice
1424          *
1425          * @param string $name Message name, or 'default' for $wgSiteNotice
1426          * @return string|bool HTML fragment, or false to indicate that the caller
1427          *   should fall back to the next notice in its sequence
1428          */
1429         private function getCachedNotice( $name ) {
1430                 global $wgRenderHashAppend, $parserMemc, $wgContLang;
1431
1432                 $needParse = false;
1433
1434                 if ( $name === 'default' ) {
1435                         // special case
1436                         global $wgSiteNotice;
1437                         $notice = $wgSiteNotice;
1438                         if ( empty( $notice ) ) {
1439                                 return false;
1440                         }
1441                 } else {
1442                         $msg = $this->msg( $name )->inContentLanguage();
1443                         if ( $msg->isBlank() ) {
1444                                 return '';
1445                         } elseif ( $msg->isDisabled() ) {
1446                                 return false;
1447                         }
1448                         $notice = $msg->plain();
1449                 }
1450
1451                 // Use the extra hash appender to let eg SSL variants separately cache.
1452                 $key = wfMemcKey( $name . $wgRenderHashAppend );
1453                 $cachedNotice = $parserMemc->get( $key );
1454                 if ( is_array( $cachedNotice ) ) {
1455                         if ( md5( $notice ) == $cachedNotice['hash'] ) {
1456                                 $notice = $cachedNotice['html'];
1457                         } else {
1458                                 $needParse = true;
1459                         }
1460                 } else {
1461                         $needParse = true;
1462                 }
1463
1464                 if ( $needParse ) {
1465                         $parsed = $this->getOutput()->parse( $notice );
1466                         $parserMemc->set( $key, [ 'html' => $parsed, 'hash' => md5( $notice ) ], 600 );
1467                         $notice = $parsed;
1468                 }
1469
1470                 $notice = Html::rawElement( 'div', [ 'id' => 'localNotice',
1471                         'lang' => $wgContLang->getHtmlCode(), 'dir' => $wgContLang->getDir() ], $notice );
1472                 return $notice;
1473         }
1474
1475         /**
1476          * Get the site notice
1477          *
1478          * @return string HTML fragment
1479          */
1480         function getSiteNotice() {
1481                 $siteNotice = '';
1482
1483                 if ( Hooks::run( 'SiteNoticeBefore', [ &$siteNotice, $this ] ) ) {
1484                         if ( is_object( $this->getUser() ) && $this->getUser()->isLoggedIn() ) {
1485                                 $siteNotice = $this->getCachedNotice( 'sitenotice' );
1486                         } else {
1487                                 $anonNotice = $this->getCachedNotice( 'anonnotice' );
1488                                 if ( $anonNotice === false ) {
1489                                         $siteNotice = $this->getCachedNotice( 'sitenotice' );
1490                                 } else {
1491                                         $siteNotice = $anonNotice;
1492                                 }
1493                         }
1494                         if ( $siteNotice === false ) {
1495                                 $siteNotice = $this->getCachedNotice( 'default' );
1496                         }
1497                 }
1498
1499                 Hooks::run( 'SiteNoticeAfter', [ &$siteNotice, $this ] );
1500                 return $siteNotice;
1501         }
1502
1503         /**
1504          * Create a section edit link.  This supersedes editSectionLink() and
1505          * editSectionLinkForOther().
1506          *
1507          * @param Title $nt The title being linked to (may not be the same as
1508          *   the current page, if the section is included from a template)
1509          * @param string $section The designation of the section being pointed to,
1510          *   to be included in the link, like "&section=$section"
1511          * @param string $tooltip The tooltip to use for the link: will be escaped
1512          *   and wrapped in the 'editsectionhint' message
1513          * @param string $lang Language code
1514          * @return string HTML to use for edit link
1515          */
1516         public function doEditSectionLink( Title $nt, $section, $tooltip = null, $lang = false ) {
1517                 // HTML generated here should probably have userlangattributes
1518                 // added to it for LTR text on RTL pages
1519
1520                 $lang = wfGetLangObj( $lang );
1521
1522                 $attribs = [];
1523                 if ( !is_null( $tooltip ) ) {
1524                         # Bug 25462: undo double-escaping.
1525                         $tooltip = Sanitizer::decodeCharReferences( $tooltip );
1526                         $attribs['title'] = wfMessage( 'editsectionhint' )->rawParams( $tooltip )
1527                                 ->inLanguage( $lang )->text();
1528                 }
1529
1530                 $links = [
1531                         'editsection' => [
1532                                 'text' => wfMessage( 'editsection' )->inLanguage( $lang )->escaped(),
1533                                 'targetTitle' => $nt,
1534                                 'attribs' => $attribs,
1535                                 'query' => [ 'action' => 'edit', 'section' => $section ],
1536                                 'options' => [ 'noclasses', 'known' ]
1537                         ]
1538                 ];
1539
1540                 Hooks::run( 'SkinEditSectionLinks', [ $this, $nt, $section, $tooltip, &$links, $lang ] );
1541
1542                 $result = '<span class="mw-editsection"><span class="mw-editsection-bracket">[</span>';
1543
1544                 $linksHtml = [];
1545                 foreach ( $links as $k => $linkDetails ) {
1546                         $linksHtml[] = Linker::link(
1547                                 $linkDetails['targetTitle'],
1548                                 $linkDetails['text'],
1549                                 $linkDetails['attribs'],
1550                                 $linkDetails['query'],
1551                                 $linkDetails['options']
1552                         );
1553                 }
1554
1555                 $result .= implode(
1556                         '<span class="mw-editsection-divider">'
1557                                 . wfMessage( 'pipe-separator' )->inLanguage( $lang )->text()
1558                                 . '</span>',
1559                         $linksHtml
1560                 );
1561
1562                 $result .= '<span class="mw-editsection-bracket">]</span></span>';
1563                 // Deprecated, use SkinEditSectionLinks hook instead
1564                 Hooks::run(
1565                         'DoEditSectionLink',
1566                         [ $this, $nt, $section, $tooltip, &$result, $lang ],
1567                         '1.25'
1568                 );
1569                 return $result;
1570         }
1571
1572         /**
1573          * Use PHP's magic __call handler to intercept legacy calls to the linker
1574          * for backwards compatibility.
1575          *
1576          * @param string $fname Name of called method
1577          * @param array $args Arguments to the method
1578          * @throws MWException
1579          * @return mixed
1580          */
1581         function __call( $fname, $args ) {
1582                 $realFunction = [ 'Linker', $fname ];
1583                 if ( is_callable( $realFunction ) ) {
1584                         wfDeprecated( get_class( $this ) . '::' . $fname, '1.21' );
1585                         return call_user_func_array( $realFunction, $args );
1586                 } else {
1587                         $className = get_class( $this );
1588                         throw new MWException( "Call to undefined method $className::$fname" );
1589                 }
1590         }
1591
1592 }