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 $allowedSkins;
  82         }
  83
  84         /**
  85          * Normalize a skin preference value to a form that can be loaded.
  86          *
  87          * If a skin can't be found, it will fall back to the configured default ($wgDefaultSkin), or the
  88          * hardcoded default ($wgFallbackSkin) if the default skin is unavailable too.
  89          *
  90          * @param string $key 'monobook', 'vector', etc.
  91          * @return string
  92          */
  93         static function normalizeKey( $key ) {
  94                 global $wgDefaultSkin, $wgFallbackSkin;
  95
  96                 $skinNames = Skin::getSkinNames();
  97
  98                 // Make keys lowercase for case-insensitive matching.
  99                 $skinNames = array_change_key_case( $skinNames, CASE_LOWER );
 100                 $key = strtolower( $key );
 101                 $defaultSkin = strtolower( $wgDefaultSkin );
 102                 $fallbackSkin = strtolower( $wgFallbackSkin );
 103
 104                 if ( $key == '' || $key == 'default' ) {
 105                         // Don't return the default immediately;
 106                         // in a misconfiguration we need to fall back.
 107                         $key = $defaultSkin;
 108                 }
 109
 110                 if ( isset( $skinNames[$key] ) ) {
 111                         return $key;
 112                 }
 113
 114                 // Older versions of the software used a numeric setting
 115                 // in the user preferences.
 116                 $fallback = [
 117                         0 => $defaultSkin,
 118                         2 => 'cologneblue'
 119                 ];
 120
 121                 if ( isset( $fallback[$key] ) ) {
 122                         $key = $fallback[$key];
 123                 }
 124
 125                 if ( isset( $skinNames[$key] ) ) {
 126                         return $key;
 127                 } elseif ( isset( $skinNames[$defaultSkin] ) ) {
 128                         return $defaultSkin;
 129                 } else {
 130                         return $fallbackSkin;
 131                 }
 132         }
 133
 134         /**
 135          * @return string Skin name
 136          */
 137         public function getSkinName() {
 138                 return $this->skinname;
 139         }
 140
 141         /**
 142          * @param OutputPage $out
 143          */
 144         public function initPage( OutputPage $out ) {
 145                 $this->preloadExistence();
 146         }
 147
 148         /**
 149          * Defines the ResourceLoader modules that should be added to the skin
 150          * It is recommended that skins wishing to override call parent::getDefaultModules()
 151          * and substitute out any modules they wish to change by using a key to look them up
 152          * @return array Array of modules with helper keys for easy overriding
 153          */
 154         public function getDefaultModules() {
 155                 global $wgUseAjax, $wgEnableAPI, $wgEnableWriteAPI;
 156
 157                 $out = $this->getOutput();
 158                 $user = $out->getUser();
 159                 $modules = [
 160                         // modules that enhance the page content in some way
 161                         'content' => [
 162                                 'mediawiki.page.ready',
 163                         ],
 164                         // modules that exist for legacy reasons
 165                         'legacy' => ResourceLoaderStartUpModule::getLegacyModules(),
 166                         // modules relating to search functionality
 167                         'search' => [],
 168                         // modules relating to functionality relating to watching an article
 169                         'watch' => [],
 170                         // modules which relate to the current users preferences
 171                         'user' => [],
 172                 ];
 173
 174                 // Add various resources if required
 175                 if ( $wgUseAjax && $wgEnableAPI ) {
 176                         if ( $wgEnableWriteAPI && $user->isLoggedIn()
 177                                 && $user->isAllowedAll( 'writeapi', 'viewmywatchlist', 'editmywatchlist' )
 178                                 && $this->getRelevantTitle()->canExist()
 179                         ) {
 180                                 $modules['watch'][] = 'mediawiki.page.watch.ajax';
 181                         }
 182
 183                         $modules['search'][] = 'mediawiki.searchSuggest';
 184                 }
 185
 186                 if ( $user->getBoolOption( 'editsectiononrightclick' ) ) {
 187                         $modules['user'][] = 'mediawiki.action.view.rightClickEdit';
 188                 }
 189
 190                 // Crazy edit-on-double-click stuff
 191                 if ( $out->isArticle() && $user->getOption( 'editondblclick' ) ) {
 192                         $modules['user'][] = 'mediawiki.action.view.dblClickEdit';
 193                 }
 194                 return $modules;
 195         }
 196
 197         /**
 198          * Preload the existence of three commonly-requested pages in a single query
 199          */
 200         protected function preloadExistence() {
 201                 $titles = [];
 202
 203                 // User/talk link
 204                 $user = $this->getUser();
 205                 if ( $user->isLoggedIn() ) {
 206                         $titles[] = $user->getUserPage();
 207                         $titles[] = $user->getTalkPage();
 208                 }
 209
 210                 // Check, if the page can hold some kind of content, otherwise do nothing
 211                 $title = $this->getRelevantTitle();
 212                 if ( $title->canExist() ) {
 213                         if ( $title->isTalkPage() ) {
 214                                 $titles[] = $title->getSubjectPage();
 215                         } else {
 216                                 $titles[] = $title->getTalkPage();
 217                         }
 218                 }
 219
 220                 // Footer links (used by SkinTemplate::prepareQuickTemplate)
 221                 foreach ( [
 222                         $this->footerLinkTitle( 'privacy', 'privacypage' ),
 223                         $this->footerLinkTitle( 'aboutsite', 'aboutpage' ),
 224                         $this->footerLinkTitle( 'disclaimers', 'disclaimerpage' ),
 225                 ] as $title ) {
 226                         if ( $title ) {
 227                                 $titles[] = $title;
 228                         }
 229                 }
 230
 231                 Hooks::run( 'SkinPreloadExistence', [ &$titles, $this ] );
 232
 233                 if ( $titles ) {
 234                         $lb = new LinkBatch( $titles );
 235                         $lb->setCaller( __METHOD__ );
 236                         $lb->execute();
 237                 }
 238         }
 239
 240         /**
 241          * Get the current revision ID
 242          *
 243          * @return int
 244          */
 245         public function getRevisionId() {
 246                 return $this->getOutput()->getRevisionId();
 247         }
 248
 249         /**
 250          * Whether the revision displayed is the latest revision of the page
 251          *
 252          * @return bool
 253          */
 254         public function isRevisionCurrent() {
 255                 $revID = $this->getRevisionId();
 256                 return $revID == 0 || $revID == $this->getTitle()->getLatestRevID();
 257         }
 258
 259         /**
 260          * Set the "relevant" title
 261          * @see self::getRelevantTitle()
 262          * @param Title $t
 263          */
 264         public function setRelevantTitle( $t ) {
 265                 $this->mRelevantTitle = $t;
 266         }
 267
 268         /**
 269          * Return the "relevant" title.
 270          * A "relevant" title is not necessarily the actual title of the page.
 271          * Special pages like Special:MovePage use set the page they are acting on
 272          * as their "relevant" title, this allows the skin system to display things
 273          * such as content tabs which belong to to that page instead of displaying
 274          * a basic special page tab which has almost no meaning.
 275          *
 276          * @return Title
 277          */
 278         public function getRelevantTitle() {
 279                 if ( isset( $this->mRelevantTitle ) ) {
 280                         return $this->mRelevantTitle;
 281                 }
 282                 return $this->getTitle();
 283         }
 284
 285         /**
 286          * Set the "relevant" user
 287          * @see self::getRelevantUser()
 288          * @param User $u
 289          */
 290         public function setRelevantUser( $u ) {
 291                 $this->mRelevantUser = $u;
 292         }
 293
 294         /**
 295          * Return the "relevant" user.
 296          * A "relevant" user is similar to a relevant title. Special pages like
 297          * Special:Contributions mark the user which they are relevant to so that
 298          * things like the toolbox can display the information they usually are only
 299          * able to display on a user's userpage and talkpage.
 300          * @return User
 301          */
 302         public function getRelevantUser() {
 303                 if ( isset( $this->mRelevantUser ) ) {
 304                         return $this->mRelevantUser;
 305                 }
 306                 $title = $this->getRelevantTitle();
 307                 if ( $title->hasSubjectNamespace( NS_USER ) ) {
 308                         $rootUser = $title->getRootText();
 309                         if ( User::isIP( $rootUser ) ) {
 310                                 $this->mRelevantUser = User::newFromName( $rootUser, false );
 311                         } else {
 312                                 $user = User::newFromName( $rootUser, false );
 313
 314                                 if ( $user ) {
 315                                         $user->load( User::READ_NORMAL );
 316
 317                                         if ( $user->isLoggedIn() ) {
 318                                                 $this->mRelevantUser = $user;
 319                                         }
 320                                 }
 321                         }
 322                         return $this->mRelevantUser;
 323                 }
 324                 return null;
 325         }
 326
 327         /**
 328          * Outputs the HTML generated by other functions.
 329          * @param OutputPage $out
 330          */
 331         abstract function outputPage( OutputPage $out = null );
 332
 333         /**
 334          * @param array $data
 335          * @return string
 336          */
 337         static function makeVariablesScript( $data ) {
 338                 if ( $data ) {
 339                         return ResourceLoader::makeInlineScript(
 340                                 ResourceLoader::makeConfigSetScript( $data )
 341                         );
 342                 } else {
 343                         return '';
 344                 }
 345         }
 346
 347         /**
 348          * Get the query to generate a dynamic stylesheet
 349          *
 350          * @return array
 351          */
 352         public static function getDynamicStylesheetQuery() {
 353                 global $wgSquidMaxage;
 354
 355                 return [
 356                                 'action' => 'raw',
 357                                 'maxage' => $wgSquidMaxage,
 358                                 'usemsgcache' => 'yes',
 359                                 'ctype' => 'text/css',
 360                                 'smaxage' => $wgSquidMaxage,
 361                         ];
 362         }
 363
 364         /**
 365          * Add skin specific stylesheets
 366          * Calling this method with an $out of anything but the same OutputPage
 367          * inside ->getOutput() is deprecated. The $out arg is kept
 368          * for compatibility purposes with skins.
 369          * @param OutputPage $out
 370          * @todo delete
 371          */
 372         abstract function setupSkinUserCss( OutputPage $out );
 373
 374         /**
 375          * TODO: document
 376          * @param Title $title
 377          * @return string
 378          */
 379         function getPageClasses( $title ) {
 380                 $numeric = 'ns-' . $title->getNamespace();
 381
 382                 if ( $title->isSpecialPage() ) {
 383                         $type = 'ns-special';
 384                         // T25315: provide a class based on the canonical special page name without subpages
 385                         list( $canonicalName ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );
 386                         if ( $canonicalName ) {
 387                                 $type .= ' ' . Sanitizer::escapeClass( "mw-special-$canonicalName" );
 388                         } else {
 389                                 $type .= ' mw-invalidspecialpage';
 390                         }
 391                 } elseif ( $title->isTalkPage() ) {
 392                         $type = 'ns-talk';
 393                 } else {
 394                         $type = 'ns-subject';
 395                 }
 396
 397                 $name = Sanitizer::escapeClass( 'page-' . $title->getPrefixedText() );
 398                 $root = Sanitizer::escapeClass( 'rootpage-' . $title->getRootTitle()->getPrefixedText() );
 399
 400                 return "$numeric $type $name $root";
 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          * @param OutputPage $out Defaults to $this->getOutput() if left as null
 661          * @return string
 662          */
 663         function subPageSubtitle( $out = null ) {
 664                 if ( $out === null ) {
 665                         $out = $this->getOutput();
 666                 }
 667                 $title = $out->getTitle();
 668                 $subpages = '';
 669
 670                 if ( !Hooks::run( 'SkinSubPageSubtitle', [ &$subpages, $this, $out ] ) ) {
 671                         return $subpages;
 672                 }
 673
 674                 if ( $out->isArticle() && MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 675                         $ptext = $title->getPrefixedText();
 676                         if ( strpos( $ptext, '/' ) !== false ) {
 677                                 $links = explode( '/', $ptext );
 678                                 array_pop( $links );
 679                                 $c = 0;
 680                                 $growinglink = '';
 681                                 $display = '';
 682                                 $lang = $this->getLanguage();
 683
 684                                 foreach ( $links as $link ) {
 685                                         $growinglink .= $link;
 686                                         $display .= $link;
 687                                         $linkObj = Title::newFromText( $growinglink );
 688
 689                                         if ( is_object( $linkObj ) && $linkObj->isKnown() ) {
 690                                                 $getlink = Linker::linkKnown(
 691                                                         $linkObj,
 692                                                         htmlspecialchars( $display )
 693                                                 );
 694
 695                                                 $c++;
 696
 697                                                 if ( $c > 1 ) {
 698                                                         $subpages .= $lang->getDirMarkEntity() . $this->msg( 'pipe-separator' )->escaped();
 699                                                 } else {
 700                                                         $subpages .= '&lt; ';
 701                                                 }
 702
 703                                                 $subpages .= $getlink;
 704                                                 $display = '';
 705                                         } else {
 706                                                 $display .= '/';
 707                                         }
 708                                         $growinglink .= '/';
 709                                 }
 710                         }
 711                 }
 712
 713                 return $subpages;
 714         }
 715
 716         /**
 717          * @deprecated since 1.27, feature removed
 718          * @return bool Always false
 719          */
 720         function showIPinHeader() {
 721                 wfDeprecated( __METHOD__, '1.27' );
 722                 return false;
 723         }
 724
 725         /**
 726          * @return string
 727          */
 728         function getSearchLink() {
 729                 $searchPage = SpecialPage::getTitleFor( 'Search' );
 730                 return $searchPage->getLocalURL();
 731         }
 732
 733         /**
 734          * @return string
 735          */
 736         function escapeSearchLink() {
 737                 return htmlspecialchars( $this->getSearchLink() );
 738         }
 739
 740         /**
 741          * @param string $type
 742          * @return string
 743          */
 744         function getCopyright( $type = 'detect' ) {
 745                 global $wgRightsPage, $wgRightsUrl, $wgRightsText;
 746
 747                 if ( $type == 'detect' ) {
 748                         if ( !$this->isRevisionCurrent()
 749                                 && !$this->msg( 'history_copyright' )->inContentLanguage()->isDisabled()
 750                         ) {
 751                                 $type = 'history';
 752                         } else {
 753                                 $type = 'normal';
 754                         }
 755                 }
 756
 757                 if ( $type == 'history' ) {
 758                         $msg = 'history_copyright';
 759                 } else {
 760                         $msg = 'copyright';
 761                 }
 762
 763                 if ( $wgRightsPage ) {
 764                         $title = Title::newFromText( $wgRightsPage );
 765                         $link = Linker::linkKnown( $title, $wgRightsText );
 766                 } elseif ( $wgRightsUrl ) {
 767                         $link = Linker::makeExternalLink( $wgRightsUrl, $wgRightsText );
 768                 } elseif ( $wgRightsText ) {
 769                         $link = $wgRightsText;
 770                 } else {
 771                         # Give up now
 772                         return '';
 773                 }
 774
 775                 // Allow for site and per-namespace customization of copyright notice.
 776                 // @todo Remove deprecated $forContent param from hook handlers and then remove here.
 777                 $forContent = true;
 778
 779                 Hooks::run(
 780                         'SkinCopyrightFooter',
 781                         [ $this->getTitle(), $type, &$msg, &$link, &$forContent ]
 782                 );
 783
 784                 return $this->msg( $msg )->rawParams( $link )->text();
 785         }
 786
 787         /**
 788          * @return null|string
 789          */
 790         function getCopyrightIcon() {
 791                 global $wgRightsUrl, $wgRightsText, $wgRightsIcon, $wgFooterIcons;
 792
 793                 $out = '';
 794
 795                 if ( $wgFooterIcons['copyright']['copyright'] ) {
 796                         $out = $wgFooterIcons['copyright']['copyright'];
 797                 } elseif ( $wgRightsIcon ) {
 798                         $icon = htmlspecialchars( $wgRightsIcon );
 799
 800                         if ( $wgRightsUrl ) {
 801                                 $url = htmlspecialchars( $wgRightsUrl );
 802                                 $out .= '<a href="' . $url . '">';
 803                         }
 804
 805                         $text = htmlspecialchars( $wgRightsText );
 806                         $out .= "<img src=\"$icon\" alt=\"$text\" width=\"88\" height=\"31\" />";
 807
 808                         if ( $wgRightsUrl ) {
 809                                 $out .= '</a>';
 810                         }
 811                 }
 812
 813                 return $out;
 814         }
 815
 816         /**
 817          * Gets the powered by MediaWiki icon.
 818          * @return string
 819          */
 820         function getPoweredBy() {
 821                 global $wgResourceBasePath;
 822
 823                 $url1 = htmlspecialchars(
 824                         "$wgResourceBasePath/resources/assets/poweredby_mediawiki_88x31.png"
 825                 );
 826                 $url1_5 = htmlspecialchars(
 827                         "$wgResourceBasePath/resources/assets/poweredby_mediawiki_132x47.png"
 828                 );
 829                 $url2 = htmlspecialchars(
 830                         "$wgResourceBasePath/resources/assets/poweredby_mediawiki_176x62.png"
 831                 );
 832                 $text = '<a href="//www.mediawiki.org/"><img src="' . $url1
 833                         . '" srcset="' . $url1_5 . ' 1.5x, ' . $url2 . ' 2x" '
 834                         . 'height="31" width="88" alt="Powered by MediaWiki" /></a>';
 835                 Hooks::run( 'SkinGetPoweredBy', [ &$text, $this ] );
 836                 return $text;
 837         }
 838
 839         /**
 840          * Get the timestamp of the latest revision, formatted in user language
 841          *
 842          * @return string
 843          */
 844         protected function lastModified() {
 845                 $timestamp = $this->getOutput()->getRevisionTimestamp();
 846
 847                 # No cached timestamp, load it from the database
 848                 if ( $timestamp === null ) {
 849                         $timestamp = Revision::getTimestampFromId( $this->getTitle(), $this->getRevisionId() );
 850                 }
 851
 852                 if ( $timestamp ) {
 853                         $d = $this->getLanguage()->userDate( $timestamp, $this->getUser() );
 854                         $t = $this->getLanguage()->userTime( $timestamp, $this->getUser() );
 855                         $s = ' ' . $this->msg( 'lastmodifiedat', $d, $t )->parse();
 856                 } else {
 857                         $s = '';
 858                 }
 859
 860                 if ( wfGetLB()->getLaggedReplicaMode() ) {
 861                         $s .= ' <strong>' . $this->msg( 'laggedslavemode' )->parse() . '</strong>';
 862                 }
 863
 864                 return $s;
 865         }
 866
 867         /**
 868          * @param string $align
 869          * @return string
 870          */
 871         function logoText( $align = '' ) {
 872                 if ( $align != '' ) {
 873                         $a = " style='float: {$align};'";
 874                 } else {
 875                         $a = '';
 876                 }
 877
 878                 $mp = $this->msg( 'mainpage' )->escaped();
 879                 $mptitle = Title::newMainPage();
 880                 $url = ( is_object( $mptitle ) ? htmlspecialchars( $mptitle->getLocalURL() ) : '' );
 881
 882                 $logourl = $this->getLogo();
 883                 $s = "<a href='{$url}'><img{$a} src='{$logourl}' alt='[{$mp}]' /></a>";
 884
 885                 return $s;
 886         }
 887
 888         /**
 889          * Renders a $wgFooterIcons icon according to the method's arguments
 890          * @param array $icon The icon to build the html for, see $wgFooterIcons
 891          *   for the format of this array.
 892          * @param bool|string $withImage Whether to use the icon's image or output
 893          *   a text-only footericon.
 894          * @return string HTML
 895          */
 896         function makeFooterIcon( $icon, $withImage = 'withImage' ) {
 897                 if ( is_string( $icon ) ) {
 898                         $html = $icon;
 899                 } else { // Assuming array
 900                         $url = isset( $icon["url"] ) ? $icon["url"] : null;
 901                         unset( $icon["url"] );
 902                         if ( isset( $icon["src"] ) && $withImage === 'withImage' ) {
 903                                 // do this the lazy way, just pass icon data as an attribute array
 904                                 $html = Html::element( 'img', $icon );
 905                         } else {
 906                                 $html = htmlspecialchars( $icon["alt"] );
 907                         }
 908                         if ( $url ) {
 909                                 global $wgExternalLinkTarget;
 910                                 $html = Html::rawElement( 'a',
 911                                         [ "href" => $url, "target" => $wgExternalLinkTarget ],
 912                                         $html );
 913                         }
 914                 }
 915                 return $html;
 916         }
 917
 918         /**
 919          * Gets the link to the wiki's main page.
 920          * @return string
 921          */
 922         function mainPageLink() {
 923                 $s = Linker::linkKnown(
 924                         Title::newMainPage(),
 925                         $this->msg( 'mainpage' )->escaped()
 926                 );
 927
 928                 return $s;
 929         }
 930
 931         /**
 932          * Returns an HTML link for use in the footer
 933          * @param string $desc The i18n message key for the link text
 934          * @param string $page The i18n message key for the page to link to
 935          * @return string HTML anchor
 936          */
 937         public function footerLink( $desc, $page ) {
 938                 $title = $this->footerLinkTitle( $desc, $page );
 939                 if ( !$title ) {
 940                         return '';
 941                 }
 942
 943                 return Linker::linkKnown(
 944                         $title,
 945                         $this->msg( $desc )->escaped()
 946                 );
 947         }
 948
 949         /**
 950          * @param string $desc
 951          * @param string $page
 952          * @return Title|null
 953          */
 954         private function footerLinkTitle( $desc, $page ) {
 955                 // If the link description has been set to "-" in the default language,
 956                 if ( $this->msg( $desc )->inContentLanguage()->isDisabled() ) {
 957                         // then it is disabled, for all languages.
 958                         return null;
 959                 }
 960                 // Otherwise, we display the link for the user, described in their
 961                 // language (which may or may not be the same as the default language),
 962                 // but we make the link target be the one site-wide page.
 963                 $title = Title::newFromText( $this->msg( $page )->inContentLanguage()->text() );
 964
 965                 return $title ?: null;
 966         }
 967
 968         /**
 969          * Gets the link to the wiki's privacy policy page.
 970          * @return string HTML
 971          */
 972         function privacyLink() {
 973                 return $this->footerLink( 'privacy', 'privacypage' );
 974         }
 975
 976         /**
 977          * Gets the link to the wiki's about page.
 978          * @return string HTML
 979          */
 980         function aboutLink() {
 981                 return $this->footerLink( 'aboutsite', 'aboutpage' );
 982         }
 983
 984         /**
 985          * Gets the link to the wiki's general disclaimers page.
 986          * @return string HTML
 987          */
 988         function disclaimerLink() {
 989                 return $this->footerLink( 'disclaimers', 'disclaimerpage' );
 990         }
 991
 992         /**
 993          * Return URL options for the 'edit page' link.
 994          * This may include an 'oldid' specifier, if the current page view is such.
 995          *
 996          * @return array
 997          * @private
 998          */
 999         function editUrlOptions() {
1000                 $options = [ 'action' => 'edit' ];
1001
1002                 if ( !$this->isRevisionCurrent() ) {
1003                         $options['oldid'] = intval( $this->getRevisionId() );
1004                 }
1005
1006                 return $options;
1007         }
1008
1009         /**
1010          * @param User|int $id
1011          * @return bool
1012          */
1013         function showEmailUser( $id ) {
1014                 if ( $id instanceof User ) {
1015                         $targetUser = $id;
1016                 } else {
1017                         $targetUser = User::newFromId( $id );
1018                 }
1019
1020                 # The sending user must have a confirmed email address and the target
1021                 # user must have a confirmed email address and allow emails from users.
1022                 return $this->getUser()->canSendEmail() &&
1023                         $targetUser->canReceiveEmail();
1024         }
1025
1026         /**
1027          * Return a fully resolved style path url to images or styles stored in the current skins's folder.
1028          * This method returns a url resolved using the configured skin style path
1029          * and includes the style version inside of the url.
1030          *
1031          * Requires $stylename to be set, otherwise throws MWException.
1032          *
1033          * @param string $name The name or path of a skin resource file
1034          * @return string The fully resolved style path url including styleversion
1035          * @throws MWException
1036          */
1037         function getSkinStylePath( $name ) {
1038                 global $wgStylePath, $wgStyleVersion;
1039
1040                 if ( $this->stylename === null ) {
1041                         $class = static::class;
1042                         throw new MWException( "$class::\$stylename must be set to use getSkinStylePath()" );
1043                 }
1044
1045                 return "$wgStylePath/{$this->stylename}/$name?$wgStyleVersion";
1046         }
1047
1048         /* these are used extensively in SkinTemplate, but also some other places */
1049
1050         /**
1051          * @param string $urlaction
1052          * @return string
1053          */
1054         static function makeMainPageUrl( $urlaction = '' ) {
1055                 $title = Title::newMainPage();
1056                 self::checkTitle( $title, '' );
1057
1058                 return $title->getLocalURL( $urlaction );
1059         }
1060
1061         /**
1062          * Make a URL for a Special Page using the given query and protocol.
1063          *
1064          * If $proto is set to null, make a local URL. Otherwise, make a full
1065          * URL with the protocol specified.
1066          *
1067          * @param string $name Name of the Special page
1068          * @param string $urlaction Query to append
1069          * @param string|null $proto Protocol to use or null for a local URL
1070          * @return string
1071          */
1072         static function makeSpecialUrl( $name, $urlaction = '', $proto = null ) {
1073                 $title = SpecialPage::getSafeTitleFor( $name );
1074                 if ( is_null( $proto ) ) {
1075                         return $title->getLocalURL( $urlaction );
1076                 } else {
1077                         return $title->getFullURL( $urlaction, false, $proto );
1078                 }
1079         }
1080
1081         /**
1082          * @param string $name
1083          * @param string $subpage
1084          * @param string $urlaction
1085          * @return string
1086          */
1087         static function makeSpecialUrlSubpage( $name, $subpage, $urlaction = '' ) {
1088                 $title = SpecialPage::getSafeTitleFor( $name, $subpage );
1089                 return $title->getLocalURL( $urlaction );
1090         }
1091
1092         /**
1093          * @param string $name
1094          * @param string $urlaction
1095          * @return string
1096          */
1097         static function makeI18nUrl( $name, $urlaction = '' ) {
1098                 $title = Title::newFromText( wfMessage( $name )->inContentLanguage()->text() );
1099                 self::checkTitle( $title, $name );
1100                 return $title->getLocalURL( $urlaction );
1101         }
1102
1103         /**
1104          * @param string $name
1105          * @param string $urlaction
1106          * @return string
1107          */
1108         static function makeUrl( $name, $urlaction = '' ) {
1109                 $title = Title::newFromText( $name );
1110                 self::checkTitle( $title, $name );
1111
1112                 return $title->getLocalURL( $urlaction );
1113         }
1114
1115         /**
1116          * If url string starts with http, consider as external URL, else
1117          * internal
1118          * @param string $name
1119          * @return string URL
1120          */
1121         static function makeInternalOrExternalUrl( $name ) {
1122                 if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $name ) ) {
1123                         return $name;
1124                 } else {
1125                         return self::makeUrl( $name );
1126                 }
1127         }
1128
1129         /**
1130          * this can be passed the NS number as defined in Language.php
1131          * @param string $name
1132          * @param string $urlaction
1133          * @param int $namespace
1134          * @return string
1135          */
1136         static function makeNSUrl( $name, $urlaction = '', $namespace = NS_MAIN ) {
1137                 $title = Title::makeTitleSafe( $namespace, $name );
1138                 self::checkTitle( $title, $name );
1139
1140                 return $title->getLocalURL( $urlaction );
1141         }
1142
1143         /**
1144          * these return an array with the 'href' and boolean 'exists'
1145          * @param string $name
1146          * @param string $urlaction
1147          * @return array
1148          */
1149         static function makeUrlDetails( $name, $urlaction = '' ) {
1150                 $title = Title::newFromText( $name );
1151                 self::checkTitle( $title, $name );
1152
1153                 return [
1154                         'href' => $title->getLocalURL( $urlaction ),
1155                         'exists' => $title->isKnown(),
1156                 ];
1157         }
1158
1159         /**
1160          * Make URL details where the article exists (or at least it's convenient to think so)
1161          * @param string $name Article name
1162          * @param string $urlaction
1163          * @return array
1164          */
1165         static function makeKnownUrlDetails( $name, $urlaction = '' ) {
1166                 $title = Title::newFromText( $name );
1167                 self::checkTitle( $title, $name );
1168
1169                 return [
1170                         'href' => $title->getLocalURL( $urlaction ),
1171                         'exists' => true
1172                 ];
1173         }
1174
1175         /**
1176          * make sure we have some title to operate on
1177          *
1178          * @param Title $title
1179          * @param string $name
1180          */
1181         static function checkTitle( &$title, $name ) {
1182                 if ( !is_object( $title ) ) {
1183                         $title = Title::newFromText( $name );
1184                         if ( !is_object( $title ) ) {
1185                                 $title = Title::newFromText( '--error: link target missing--' );
1186                         }
1187                 }
1188         }
1189
1190         /**
1191          * Build an array that represents the sidebar(s), the navigation bar among them.
1192          *
1193          * BaseTemplate::getSidebar can be used to simplify the format and id generation in new skins.
1194          *
1195          * The format of the returned array is [ heading => content, ... ], where:
1196          * - heading is the heading of a navigation portlet. It is either:
1197          *   - magic string to be handled by the skins ('SEARCH' / 'LANGUAGES' / 'TOOLBOX' / ...)
1198          *   - a message name (e.g. 'navigation'), the message should be HTML-escaped by the skin
1199          *   - plain text, which should be HTML-escaped by the skin
1200          * - content is the contents of the portlet. It is either:
1201          *   - HTML text (<ul><li>...</li>...</ul>)
1202          *   - array of link data in a format accepted by BaseTemplate::makeListItem()
1203          *   - (for a magic string as a key, any value)
1204          *
1205          * Note that extensions can control the sidebar contents using the SkinBuildSidebar hook
1206          * and can technically insert anything in here; skin creators are expected to handle
1207          * values described above.
1208          *
1209          * @return array
1210          */
1211         function buildSidebar() {
1212                 global $wgEnableSidebarCache, $wgSidebarCacheExpiry;
1213
1214                 $that = $this;
1215                 $callback = function () use ( $that ) {
1216                         $bar = [];
1217                         $that->addToSidebar( $bar, 'sidebar' );
1218                         Hooks::run( 'SkinBuildSidebar', [ $that, &$bar ] );
1219
1220                         return $bar;
1221                 };
1222
1223                 if ( $wgEnableSidebarCache ) {
1224                         $cache = ObjectCache::getMainWANInstance();
1225                         $sidebar = $cache->getWithSetCallback(
1226                                 $cache->makeKey( 'sidebar', $this->getLanguage()->getCode() ),
1227                                 MessageCache::singleton()->isDisabled()
1228                                         ? $cache::TTL_UNCACHEABLE // bug T133069
1229                                         : $wgSidebarCacheExpiry,
1230                                 $callback,
1231                                 [ 'lockTSE' => 30 ]
1232                         );
1233                 } else {
1234                         $sidebar = $callback();
1235                 }
1236
1237                 // Apply post-processing to the cached value
1238                 Hooks::run( 'SidebarBeforeOutput', [ $this, &$sidebar ] );
1239
1240                 return $sidebar;
1241         }
1242
1243         /**
1244          * Add content from a sidebar system message
1245          * Currently only used for MediaWiki:Sidebar (but may be used by Extensions)
1246          *
1247          * This is just a wrapper around addToSidebarPlain() for backwards compatibility
1248          *
1249          * @param array $bar
1250          * @param string $message
1251          */
1252         public function addToSidebar( &$bar, $message ) {
1253                 $this->addToSidebarPlain( $bar, wfMessage( $message )->inContentLanguage()->plain() );
1254         }
1255
1256         /**
1257          * Add content from plain text
1258          * @since 1.17
1259          * @param array $bar
1260          * @param string $text
1261          * @return array
1262          */
1263         function addToSidebarPlain( &$bar, $text ) {
1264                 $lines = explode( "\n", $text );
1265
1266                 $heading = '';
1267                 $messageTitle = $this->getConfig()->get( 'EnableSidebarCache' )
1268                         ? Title::newMainPage() : $this->getTitle();
1269
1270                 foreach ( $lines as $line ) {
1271                         if ( strpos( $line, '*' ) !== 0 ) {
1272                                 continue;
1273                         }
1274                         $line = rtrim( $line, "\r" ); // for Windows compat
1275
1276                         if ( strpos( $line, '**' ) !== 0 ) {
1277                                 $heading = trim( $line, '* ' );
1278                                 if ( !array_key_exists( $heading, $bar ) ) {
1279                                         $bar[$heading] = [];
1280                                 }
1281                         } else {
1282                                 $line = trim( $line, '* ' );
1283
1284                                 if ( strpos( $line, '|' ) !== false ) { // sanity check
1285                                         $line = MessageCache::singleton()->transform( $line, false, null, $messageTitle );
1286                                         $line = array_map( 'trim', explode( '|', $line, 2 ) );
1287                                         if ( count( $line ) !== 2 ) {
1288                                                 // Second sanity check, could be hit by people doing
1289                                                 // funky stuff with parserfuncs... (T35321)
1290                                                 continue;
1291                                         }
1292
1293                                         $extraAttribs = [];
1294
1295                                         $msgLink = $this->msg( $line[0] )->title( $messageTitle )->inContentLanguage();
1296                                         if ( $msgLink->exists() ) {
1297                                                 $link = $msgLink->text();
1298                                                 if ( $link == '-' ) {
1299                                                         continue;
1300                                                 }
1301                                         } else {
1302                                                 $link = $line[0];
1303                                         }
1304                                         $msgText = $this->msg( $line[1] )->title( $messageTitle );
1305                                         if ( $msgText->exists() ) {
1306                                                 $text = $msgText->text();
1307                                         } else {
1308                                                 $text = $line[1];
1309                                         }
1310
1311                                         if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $link ) ) {
1312                                                 $href = $link;
1313
1314                                                 // Parser::getExternalLinkAttribs won't work here because of the Namespace things
1315                                                 global $wgNoFollowLinks, $wgNoFollowDomainExceptions;
1316                                                 if ( $wgNoFollowLinks && !wfMatchesDomainList( $href, $wgNoFollowDomainExceptions ) ) {
1317                                                         $extraAttribs['rel'] = 'nofollow';
1318                                                 }
1319
1320                                                 global $wgExternalLinkTarget;
1321                                                 if ( $wgExternalLinkTarget ) {
1322                                                         $extraAttribs['target'] = $wgExternalLinkTarget;
1323                                                 }
1324                                         } else {
1325                                                 $title = Title::newFromText( $link );
1326
1327                                                 if ( $title ) {
1328                                                         $title = $title->fixSpecialName();
1329                                                         $href = $title->getLinkURL();
1330                                                 } else {
1331                                                         $href = 'INVALID-TITLE';
1332                                                 }
1333                                         }
1334
1335                                         $bar[$heading][] = array_merge( [
1336                                                 'text' => $text,
1337                                                 'href' => $href,
1338                                                 'id' => 'n-' . Sanitizer::escapeId( strtr( $line[1], ' ', '-' ), 'noninitial' ),
1339                                                 'active' => false
1340                                         ], $extraAttribs );
1341                                 } else {
1342                                         continue;
1343                                 }
1344                         }
1345                 }
1346
1347                 return $bar;
1348         }
1349
1350         /**
1351          * Gets new talk page messages for the current user and returns an
1352          * appropriate alert message (or an empty string if there are no messages)
1353          * @return string
1354          */
1355         function getNewtalks() {
1356
1357                 $newMessagesAlert = '';
1358                 $user = $this->getUser();
1359                 $newtalks = $user->getNewMessageLinks();
1360                 $out = $this->getOutput();
1361
1362                 // Allow extensions to disable or modify the new messages alert
1363                 if ( !Hooks::run( 'GetNewMessagesAlert', [ &$newMessagesAlert, $newtalks, $user, $out ] ) ) {
1364                         return '';
1365                 }
1366                 if ( $newMessagesAlert ) {
1367                         return $newMessagesAlert;
1368                 }
1369
1370                 if ( count( $newtalks ) == 1 && $newtalks[0]['wiki'] === wfWikiID() ) {
1371                         $uTalkTitle = $user->getTalkPage();
1372                         $lastSeenRev = isset( $newtalks[0]['rev'] ) ? $newtalks[0]['rev'] : null;
1373                         $nofAuthors = 0;
1374                         if ( $lastSeenRev !== null ) {
1375                                 $plural = true; // Default if we have a last seen revision: if unknown, use plural
1376                                 $latestRev = Revision::newFromTitle( $uTalkTitle, false, Revision::READ_NORMAL );
1377                                 if ( $latestRev !== null ) {
1378                                         // Singular if only 1 unseen revision, plural if several unseen revisions.
1379                                         $plural = $latestRev->getParentId() !== $lastSeenRev->getId();
1380                                         $nofAuthors = $uTalkTitle->countAuthorsBetween(
1381                                                 $lastSeenRev, $latestRev, 10, 'include_new' );
1382                                 }
1383                         } else {
1384                                 // Singular if no revision -> diff link will show latest change only in any case
1385                                 $plural = false;
1386                         }
1387                         $plural = $plural ? 999 : 1;
1388                         // 999 signifies "more than one revision". We don't know how many, and even if we did,
1389                         // the number of revisions or authors is not necessarily the same as the number of
1390                         // "messages".
1391                         $newMessagesLink = Linker::linkKnown(
1392                                 $uTalkTitle,
1393                                 $this->msg( 'newmessageslinkplural' )->params( $plural )->escaped(),
1394                                 [],
1395                                 [ 'redirect' => 'no' ]
1396                         );
1397
1398                         $newMessagesDiffLink = Linker::linkKnown(
1399                                 $uTalkTitle,
1400                                 $this->msg( 'newmessagesdifflinkplural' )->params( $plural )->escaped(),
1401                                 [],
1402                                 $lastSeenRev !== null
1403                                         ? [ 'oldid' => $lastSeenRev->getId(), 'diff' => 'cur' ]
1404                                         : [ 'diff' => 'cur' ]
1405                         );
1406
1407                         if ( $nofAuthors >= 1 && $nofAuthors <= 10 ) {
1408                                 $newMessagesAlert = $this->msg(
1409                                         'youhavenewmessagesfromusers',
1410                                         $newMessagesLink,
1411                                         $newMessagesDiffLink
1412                                 )->numParams( $nofAuthors, $plural );
1413                         } else {
1414                                 // $nofAuthors === 11 signifies "11 or more" ("more than 10")
1415                                 $newMessagesAlert = $this->msg(
1416                                         $nofAuthors > 10 ? 'youhavenewmessagesmanyusers' : 'youhavenewmessages',
1417                                         $newMessagesLink,
1418                                         $newMessagesDiffLink
1419                                 )->numParams( $plural );
1420                         }
1421                         $newMessagesAlert = $newMessagesAlert->text();
1422                         # Disable CDN cache
1423                         $out->setCdnMaxage( 0 );
1424                 } elseif ( count( $newtalks ) ) {
1425                         $sep = $this->msg( 'newtalkseparator' )->escaped();
1426                         $msgs = [];
1427
1428                         foreach ( $newtalks as $newtalk ) {
1429                                 $msgs[] = Xml::element(
1430                                         'a',
1431                                         [ 'href' => $newtalk['link'] ], $newtalk['wiki']
1432                                 );
1433                         }
1434                         $parts = implode( $sep, $msgs );
1435                         $newMessagesAlert = $this->msg( 'youhavenewmessagesmulti' )->rawParams( $parts )->escaped();
1436                         $out->setCdnMaxage( 0 );
1437                 }
1438
1439                 return $newMessagesAlert;
1440         }
1441
1442         /**
1443          * Get a cached notice
1444          *
1445          * @param string $name Message name, or 'default' for $wgSiteNotice
1446          * @return string|bool HTML fragment, or false to indicate that the caller
1447          *   should fall back to the next notice in its sequence
1448          */
1449         private function getCachedNotice( $name ) {
1450                 global $wgRenderHashAppend, $parserMemc, $wgContLang;
1451
1452                 $needParse = false;
1453
1454                 if ( $name === 'default' ) {
1455                         // special case
1456                         global $wgSiteNotice;
1457                         $notice = $wgSiteNotice;
1458                         if ( empty( $notice ) ) {
1459                                 return false;
1460                         }
1461                 } else {
1462                         $msg = $this->msg( $name )->inContentLanguage();
1463                         if ( $msg->isBlank() ) {
1464                                 return '';
1465                         } elseif ( $msg->isDisabled() ) {
1466                                 return false;
1467                         }
1468                         $notice = $msg->plain();
1469                 }
1470
1471                 // Use the extra hash appender to let eg SSL variants separately cache.
1472                 $key = wfMemcKey( $name . $wgRenderHashAppend );
1473                 $cachedNotice = $parserMemc->get( $key );
1474                 if ( is_array( $cachedNotice ) ) {
1475                         if ( md5( $notice ) == $cachedNotice['hash'] ) {
1476                                 $notice = $cachedNotice['html'];
1477                         } else {
1478                                 $needParse = true;
1479                         }
1480                 } else {
1481                         $needParse = true;
1482                 }
1483
1484                 if ( $needParse ) {
1485                         $parsed = $this->getOutput()->parse( $notice );
1486                         $parserMemc->set( $key, [ 'html' => $parsed, 'hash' => md5( $notice ) ], 600 );
1487                         $notice = $parsed;
1488                 }
1489
1490                 $notice = Html::rawElement( 'div', [ 'id' => 'localNotice',
1491                         'lang' => $wgContLang->getHtmlCode(), 'dir' => $wgContLang->getDir() ], $notice );
1492                 return $notice;
1493         }
1494
1495         /**
1496          * Get the site notice
1497          *
1498          * @return string HTML fragment
1499          */
1500         function getSiteNotice() {
1501                 $siteNotice = '';
1502
1503                 if ( Hooks::run( 'SiteNoticeBefore', [ &$siteNotice, $this ] ) ) {
1504                         if ( is_object( $this->getUser() ) && $this->getUser()->isLoggedIn() ) {
1505                                 $siteNotice = $this->getCachedNotice( 'sitenotice' );
1506                         } else {
1507                                 $anonNotice = $this->getCachedNotice( 'anonnotice' );
1508                                 if ( $anonNotice === false ) {
1509                                         $siteNotice = $this->getCachedNotice( 'sitenotice' );
1510                                 } else {
1511                                         $siteNotice = $anonNotice;
1512                                 }
1513                         }
1514                         if ( $siteNotice === false ) {
1515                                 $siteNotice = $this->getCachedNotice( 'default' );
1516                         }
1517                 }
1518
1519                 Hooks::run( 'SiteNoticeAfter', [ &$siteNotice, $this ] );
1520                 return $siteNotice;
1521         }
1522
1523         /**
1524          * Create a section edit link.  This supersedes editSectionLink() and
1525          * editSectionLinkForOther().
1526          *
1527          * @param Title $nt The title being linked to (may not be the same as
1528          *   the current page, if the section is included from a template)
1529          * @param string $section The designation of the section being pointed to,
1530          *   to be included in the link, like "&section=$section"
1531          * @param string $tooltip The tooltip to use for the link: will be escaped
1532          *   and wrapped in the 'editsectionhint' message
1533          * @param string $lang Language code
1534          * @return string HTML to use for edit link
1535          */
1536         public function doEditSectionLink( Title $nt, $section, $tooltip = null, $lang = false ) {
1537                 // HTML generated here should probably have userlangattributes
1538                 // added to it for LTR text on RTL pages
1539
1540                 $lang = wfGetLangObj( $lang );
1541
1542                 $attribs = [];
1543                 if ( !is_null( $tooltip ) ) {
1544                         # T27462: undo double-escaping.
1545                         $tooltip = Sanitizer::decodeCharReferences( $tooltip );
1546                         $attribs['title'] = wfMessage( 'editsectionhint' )->rawParams( $tooltip )
1547                                 ->inLanguage( $lang )->text();
1548                 }
1549
1550                 $links = [
1551                         'editsection' => [
1552                                 'text' => wfMessage( 'editsection' )->inLanguage( $lang )->escaped(),
1553                                 'targetTitle' => $nt,
1554                                 'attribs' => $attribs,
1555                                 'query' => [ 'action' => 'edit', 'section' => $section ],
1556                                 'options' => [ 'noclasses', 'known' ]
1557                         ]
1558                 ];
1559
1560                 Hooks::run( 'SkinEditSectionLinks', [ $this, $nt, $section, $tooltip, &$links, $lang ] );
1561
1562                 $result = '<span class="mw-editsection"><span class="mw-editsection-bracket">[</span>';
1563
1564                 $linksHtml = [];
1565                 foreach ( $links as $k => $linkDetails ) {
1566                         $linksHtml[] = Linker::link(
1567                                 $linkDetails['targetTitle'],
1568                                 $linkDetails['text'],
1569                                 $linkDetails['attribs'],
1570                                 $linkDetails['query'],
1571                                 $linkDetails['options']
1572                         );
1573                 }
1574
1575                 $result .= implode(
1576                         '<span class="mw-editsection-divider">'
1577                                 . wfMessage( 'pipe-separator' )->inLanguage( $lang )->text()
1578                                 . '</span>',
1579                         $linksHtml
1580                 );
1581
1582                 $result .= '<span class="mw-editsection-bracket">]</span></span>';
1583                 // Deprecated, use SkinEditSectionLinks hook instead
1584                 Hooks::run(
1585                         'DoEditSectionLink',
1586                         [ $this, $nt, $section, $tooltip, &$result, $lang ],
1587                         '1.25'
1588                 );
1589                 return $result;
1590         }
1591
1592 }