includes/skins/Skin.php

   1 <?php
   2 /**
   3  * Base class for all skins.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 use MediaWiki\MediaWikiServices;
  24
  25 /**
  26  * @defgroup Skins Skins
  27  */
  28
  29 /**
  30  * The main skin class which provides methods and properties for all other skins.
  31  *
  32  * See docs/skin.txt for more information.
  33  *
  34  * @ingroup Skins
  35  */
  36 abstract class Skin extends ContextSource {
  37         /**
  38          * @var string|null
  39          */
  40         protected $skinname = null;
  41
  42         protected $mRelevantTitle = null;
  43         protected $mRelevantUser = null;
  44
  45         /**
  46          * @var string Stylesheets set to use. Subdirectory in skins/ where various stylesheets are
  47          *   located. Only needs to be set if you intend to use the getSkinStylePath() method.
  48          */
  49         public $stylename = null;
  50
  51         /**
  52          * Fetch the set of available skins.
  53          * @return array Associative array of strings
  54          */
  55         static function getSkinNames() {
  56                 return SkinFactory::getDefaultInstance()->getSkinNames();
  57         }
  58
  59         /**
  60          * Fetch the skinname messages for available skins.
  61          * @return string[]
  62          */
  63         static function getSkinNameMessages() {
  64                 $messages = [];
  65                 foreach ( self::getSkinNames() as $skinKey => $skinName ) {
  66                         $messages[] = "skinname-$skinKey";
  67                 }
  68                 return $messages;
  69         }
  70
  71         /**
  72          * Fetch the list of user-selectable skins in regards to $wgSkipSkins.
  73          * Useful for Special:Preferences and other places where you
  74          * only want to show skins users _can_ use.
  75          * @return string[]
  76          * @since 1.23
  77          */
  78         public static function getAllowedSkins() {
  79                 global $wgSkipSkins;
  80
  81                 $allowedSkins = self::getSkinNames();
  82
  83                 foreach ( $wgSkipSkins as $skip ) {
  84                         unset( $allowedSkins[$skip] );
  85                 }
  86
  87                 return $allowedSkins;
  88         }
  89
  90         /**
  91          * Normalize a skin preference value to a form that can be loaded.
  92          *
  93          * If a skin can't be found, it will fall back to the configured default ($wgDefaultSkin), or the
  94          * hardcoded default ($wgFallbackSkin) if the default skin is unavailable too.
  95          *
  96          * @param string $key 'monobook', 'vector', etc.
  97          * @return string
  98          */
  99         static function normalizeKey( $key ) {
 100                 global $wgDefaultSkin, $wgFallbackSkin;
 101
 102                 $skinNames = self::getSkinNames();
 103
 104                 // Make keys lowercase for case-insensitive matching.
 105                 $skinNames = array_change_key_case( $skinNames, CASE_LOWER );
 106                 $key = strtolower( $key );
 107                 $defaultSkin = strtolower( $wgDefaultSkin );
 108                 $fallbackSkin = strtolower( $wgFallbackSkin );
 109
 110                 if ( $key == '' || $key == 'default' ) {
 111                         // Don't return the default immediately;
 112                         // in a misconfiguration we need to fall back.
 113                         $key = $defaultSkin;
 114                 }
 115
 116                 if ( isset( $skinNames[$key] ) ) {
 117                         return $key;
 118                 }
 119
 120                 // Older versions of the software used a numeric setting
 121                 // in the user preferences.
 122                 $fallback = [
 123                         0 => $defaultSkin,
 124                         2 => 'cologneblue'
 125                 ];
 126
 127                 if ( isset( $fallback[$key] ) ) {
 128                         $key = $fallback[$key];
 129                 }
 130
 131                 if ( isset( $skinNames[$key] ) ) {
 132                         return $key;
 133                 } elseif ( isset( $skinNames[$defaultSkin] ) ) {
 134                         return $defaultSkin;
 135                 } else {
 136                         return $fallbackSkin;
 137                 }
 138         }
 139
 140         /**
 141          * @since 1.31
 142          * @param string|null $skinname
 143          */
 144         public function __construct( $skinname = null ) {
 145                 if ( is_string( $skinname ) ) {
 146                         $this->skinname = $skinname;
 147                 }
 148         }
 149
 150         /**
 151          * @return string|null Skin name
 152          */
 153         public function getSkinName() {
 154                 return $this->skinname;
 155         }
 156
 157         /**
 158          * @param OutputPage $out
 159          */
 160         public function initPage( OutputPage $out ) {
 161                 $this->preloadExistence();
 162         }
 163
 164         /**
 165          * Defines the ResourceLoader modules that should be added to the skin
 166          * It is recommended that skins wishing to override call parent::getDefaultModules()
 167          * and substitute out any modules they wish to change by using a key to look them up
 168          *
 169          * Any modules defined with the 'styles' key will be added as render blocking CSS via
 170          * Output::addModuleStyles. Similarly, each key should refer to a list of modules
 171          *
 172          * @return array Array of modules with helper keys for easy overriding
 173          */
 174         public function getDefaultModules() {
 175                 $out = $this->getOutput();
 176                 $config = $this->getConfig();
 177                 $user = $this->getUser();
 178
 179                 // Modules declared in the $modules literal are loaded
 180                 // for ALL users, on ALL pages, in ALL skins.
 181                 // Keep this list as small as possible!
 182                 $modules = [
 183                         'styles' => [
 184                                 // The 'styles' key sets render-blocking style modules
 185                                 // Unlike other keys in $modules, this is an associative array
 186                                 // where each key is its own group pointing to a list of modules
 187                                 'core' => [
 188                                         'mediawiki.legacy.shared',
 189                                         'mediawiki.legacy.commonPrint',
 190                                 ],
 191                                 'content' => [],
 192                                 'syndicate' => [],
 193                         ],
 194                         'core' => [
 195                                 'site',
 196                                 'mediawiki.page.startup',
 197                                 'mediawiki.user',
 198                         ],
 199                         // modules that enhance the content in some way
 200                         'content' => [
 201                                 'mediawiki.page.ready',
 202                         ],
 203                         // modules relating to search functionality
 204                         'search' => [],
 205                         // modules relating to functionality relating to watching an article
 206                         'watch' => [],
 207                         // modules which relate to the current users preferences
 208                         'user' => [],
 209                         // modules relating to RSS/Atom Feeds
 210                         'syndicate' => [],
 211                 ];
 212
 213                 // Support for high-density display images if enabled
 214                 if ( $config->get( 'ResponsiveImages' ) ) {
 215                         $modules['core'][] = 'mediawiki.hidpi';
 216                 }
 217
 218                 // Preload jquery.tablesorter for mediawiki.page.ready
 219                 if ( strpos( $out->getHTML(), 'sortable' ) !== false ) {
 220                         $modules['content'][] = 'jquery.tablesorter';
 221                         $modules['styles']['content'][] = 'jquery.tablesorter.styles';
 222                 }
 223
 224                 // Preload jquery.makeCollapsible for mediawiki.page.ready
 225                 if ( strpos( $out->getHTML(), 'mw-collapsible' ) !== false ) {
 226                         $modules['content'][] = 'jquery.makeCollapsible';
 227                         $modules['styles']['content'][] = 'jquery.makeCollapsible.styles';
 228                 }
 229
 230                 // Deprecated since 1.26: Unconditional loading of mediawiki.ui.button
 231                 // on every page is deprecated. Express a dependency instead.
 232                 if ( strpos( $out->getHTML(), 'mw-ui-button' ) !== false ) {
 233                         $modules['styles']['content'][] = 'mediawiki.ui.button';
 234                 }
 235
 236                 if ( $out->isTOCEnabled() ) {
 237                         $modules['content'][] = 'mediawiki.toc';
 238                         $modules['styles']['content'][] = 'mediawiki.toc.styles';
 239                 }
 240
 241                 // Add various resources if required
 242                 if ( $user->isLoggedIn()
 243                         && $user->isAllowedAll( 'writeapi', 'viewmywatchlist', 'editmywatchlist' )
 244                         && $this->getRelevantTitle()->canExist()
 245                 ) {
 246                         $modules['watch'][] = 'mediawiki.page.watch.ajax';
 247                 }
 248
 249                 $modules['search'][] = 'mediawiki.searchSuggest';
 250
 251                 if ( $user->getBoolOption( 'editsectiononrightclick' ) ) {
 252                         $modules['user'][] = 'mediawiki.action.view.rightClickEdit';
 253                 }
 254
 255                 // Crazy edit-on-double-click stuff
 256                 if ( $out->isArticle() && $user->getOption( 'editondblclick' ) ) {
 257                         $modules['user'][] = 'mediawiki.action.view.dblClickEdit';
 258                 }
 259
 260                 if ( $out->isSyndicated() ) {
 261                         $modules['styles']['syndicate'][] = 'mediawiki.feedlink';
 262                 }
 263
 264                 return $modules;
 265         }
 266
 267         /**
 268          * Preload the existence of three commonly-requested pages in a single query
 269          */
 270         protected function preloadExistence() {
 271                 $titles = [];
 272
 273                 // User/talk link
 274                 $user = $this->getUser();
 275                 if ( $user->isLoggedIn() ) {
 276                         $titles[] = $user->getUserPage();
 277                         $titles[] = $user->getTalkPage();
 278                 }
 279
 280                 // Check, if the page can hold some kind of content, otherwise do nothing
 281                 $title = $this->getRelevantTitle();
 282                 if ( $title->canExist() ) {
 283                         if ( $title->isTalkPage() ) {
 284                                 $titles[] = $title->getSubjectPage();
 285                         } else {
 286                                 $titles[] = $title->getTalkPage();
 287                         }
 288                 }
 289
 290                 // Footer links (used by SkinTemplate::prepareQuickTemplate)
 291                 foreach ( [
 292                         $this->footerLinkTitle( 'privacy', 'privacypage' ),
 293                         $this->footerLinkTitle( 'aboutsite', 'aboutpage' ),
 294                         $this->footerLinkTitle( 'disclaimers', 'disclaimerpage' ),
 295                 ] as $title ) {
 296                         if ( $title ) {
 297                                 $titles[] = $title;
 298                         }
 299                 }
 300
 301                 Hooks::run( 'SkinPreloadExistence', [ &$titles, $this ] );
 302
 303                 if ( $titles ) {
 304                         $lb = new LinkBatch( $titles );
 305                         $lb->setCaller( __METHOD__ );
 306                         $lb->execute();
 307                 }
 308         }
 309
 310         /**
 311          * Get the current revision ID
 312          *
 313          * @return int
 314          */
 315         public function getRevisionId() {
 316                 return $this->getOutput()->getRevisionId();
 317         }
 318
 319         /**
 320          * Whether the revision displayed is the latest revision of the page
 321          *
 322          * @return bool
 323          */
 324         public function isRevisionCurrent() {
 325                 $revID = $this->getRevisionId();
 326                 return $revID == 0 || $revID == $this->getTitle()->getLatestRevID();
 327         }
 328
 329         /**
 330          * Set the "relevant" title
 331          * @see self::getRelevantTitle()
 332          * @param Title $t
 333          */
 334         public function setRelevantTitle( $t ) {
 335                 $this->mRelevantTitle = $t;
 336         }
 337
 338         /**
 339          * Return the "relevant" title.
 340          * A "relevant" title is not necessarily the actual title of the page.
 341          * Special pages like Special:MovePage use set the page they are acting on
 342          * as their "relevant" title, this allows the skin system to display things
 343          * such as content tabs which belong to to that page instead of displaying
 344          * a basic special page tab which has almost no meaning.
 345          *
 346          * @return Title
 347          */
 348         public function getRelevantTitle() {
 349                 if ( isset( $this->mRelevantTitle ) ) {
 350                         return $this->mRelevantTitle;
 351                 }
 352                 return $this->getTitle();
 353         }
 354
 355         /**
 356          * Set the "relevant" user
 357          * @see self::getRelevantUser()
 358          * @param User $u
 359          */
 360         public function setRelevantUser( $u ) {
 361                 $this->mRelevantUser = $u;
 362         }
 363
 364         /**
 365          * Return the "relevant" user.
 366          * A "relevant" user is similar to a relevant title. Special pages like
 367          * Special:Contributions mark the user which they are relevant to so that
 368          * things like the toolbox can display the information they usually are only
 369          * able to display on a user's userpage and talkpage.
 370          * @return User
 371          */
 372         public function getRelevantUser() {
 373                 if ( isset( $this->mRelevantUser ) ) {
 374                         return $this->mRelevantUser;
 375                 }
 376                 $title = $this->getRelevantTitle();
 377                 if ( $title->hasSubjectNamespace( NS_USER ) ) {
 378                         $rootUser = $title->getRootText();
 379                         if ( User::isIP( $rootUser ) ) {
 380                                 $this->mRelevantUser = User::newFromName( $rootUser, false );
 381                         } else {
 382                                 $user = User::newFromName( $rootUser, false );
 383
 384                                 if ( $user ) {
 385                                         $user->load( User::READ_NORMAL );
 386
 387                                         if ( $user->isLoggedIn() ) {
 388                                                 $this->mRelevantUser = $user;
 389                                         }
 390                                 }
 391                         }
 392                         return $this->mRelevantUser;
 393                 }
 394                 return null;
 395         }
 396
 397         /**
 398          * Outputs the HTML generated by other functions.
 399          * @param OutputPage $out
 400          */
 401         abstract function outputPage( OutputPage $out = null );
 402
 403         /**
 404          * @param array $data
 405          * @return string
 406          */
 407         static function makeVariablesScript( $data ) {
 408                 if ( $data ) {
 409                         return ResourceLoader::makeInlineScript(
 410                                 ResourceLoader::makeConfigSetScript( $data )
 411                         );
 412                 } else {
 413                         return '';
 414                 }
 415         }
 416
 417         /**
 418          * Get the query to generate a dynamic stylesheet
 419          *
 420          * @return array
 421          */
 422         public static function getDynamicStylesheetQuery() {
 423                 global $wgSquidMaxage;
 424
 425                 return [
 426                                 'action' => 'raw',
 427                                 'maxage' => $wgSquidMaxage,
 428                                 'usemsgcache' => 'yes',
 429                                 'ctype' => 'text/css',
 430                                 'smaxage' => $wgSquidMaxage,
 431                         ];
 432         }
 433
 434         /**
 435          * Hook point for adding style modules to OutputPage.
 436          *
 437          * @deprecated since 1.32 Use getDefaultModules() instead.
 438          * @param OutputPage $out Legacy parameter, identical to $this->getOutput()
 439          */
 440         public function setupSkinUserCss( OutputPage $out ) {
 441                 // Stub.
 442         }
 443
 444         /**
 445          * TODO: document
 446          * @param Title $title
 447          * @return string
 448          */
 449         function getPageClasses( $title ) {
 450                 $numeric = 'ns-' . $title->getNamespace();
 451
 452                 if ( $title->isSpecialPage() ) {
 453                         $type = 'ns-special';
 454                         // T25315: provide a class based on the canonical special page name without subpages
 455                         list( $canonicalName ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );
 456                         if ( $canonicalName ) {
 457                                 $type .= ' ' . Sanitizer::escapeClass( "mw-special-$canonicalName" );
 458                         } else {
 459                                 $type .= ' mw-invalidspecialpage';
 460                         }
 461                 } elseif ( $title->isTalkPage() ) {
 462                         $type = 'ns-talk';
 463                 } else {
 464                         $type = 'ns-subject';
 465                 }
 466
 467                 $name = Sanitizer::escapeClass( 'page-' . $title->getPrefixedText() );
 468                 $root = Sanitizer::escapeClass( 'rootpage-' . $title->getRootTitle()->getPrefixedText() );
 469
 470                 return "$numeric $type $name $root";
 471         }
 472
 473         /**
 474          * Return values for <html> element
 475          * @return array Array of associative name-to-value elements for <html> element
 476          */
 477         public function getHtmlElementAttributes() {
 478                 $lang = $this->getLanguage();
 479                 return [
 480                         'lang' => $lang->getHtmlCode(),
 481                         'dir' => $lang->getDir(),
 482                         'class' => 'client-nojs',
 483                 ];
 484         }
 485
 486         /**
 487          * This will be called by OutputPage::headElement when it is creating the
 488          * "<body>" tag, skins can override it if they have a need to add in any
 489          * body attributes or classes of their own.
 490          * @param OutputPage $out
 491          * @param array &$bodyAttrs
 492          */
 493         function addToBodyAttributes( $out, &$bodyAttrs ) {
 494                 // does nothing by default
 495         }
 496
 497         /**
 498          * URL to the logo
 499          * @return string
 500          */
 501         function getLogo() {
 502                 global $wgLogo;
 503                 return $wgLogo;
 504         }
 505
 506         /**
 507          * Whether the logo should be preloaded with an HTTP link header or not
 508          * @since 1.29
 509          * @return bool
 510          */
 511         public function shouldPreloadLogo() {
 512                 return false;
 513         }
 514
 515         /**
 516          * @return string HTML
 517          */
 518         function getCategoryLinks() {
 519                 global $wgUseCategoryBrowser;
 520
 521                 $out = $this->getOutput();
 522                 $allCats = $out->getCategoryLinks();
 523
 524                 if ( !count( $allCats ) ) {
 525                         return '';
 526                 }
 527
 528                 $embed = "<li>";
 529                 $pop = "</li>";
 530
 531                 $s = '';
 532                 $colon = $this->msg( 'colon-separator' )->escaped();
 533
 534                 if ( !empty( $allCats['normal'] ) ) {
 535                         $t = $embed . implode( "{$pop}{$embed}", $allCats['normal'] ) . $pop;
 536
 537                         $msg = $this->msg( 'pagecategories' )->numParams( count( $allCats['normal'] ) )->escaped();
 538                         $linkPage = wfMessage( 'pagecategorieslink' )->inContentLanguage()->text();
 539                         $title = Title::newFromText( $linkPage );
 540                         $link = $title ? Linker::link( $title, $msg ) : $msg;
 541                         $s .= '<div id="mw-normal-catlinks" class="mw-normal-catlinks">' .
 542                                 $link . $colon . '<ul>' . $t . '</ul>' . '</div>';
 543                 }
 544
 545                 # Hidden categories
 546                 if ( isset( $allCats['hidden'] ) ) {
 547                         if ( $this->getUser()->getBoolOption( 'showhiddencats' ) ) {
 548                                 $class = ' mw-hidden-cats-user-shown';
 549                         } elseif ( $this->getTitle()->getNamespace() == NS_CATEGORY ) {
 550                                 $class = ' mw-hidden-cats-ns-shown';
 551                         } else {
 552                                 $class = ' mw-hidden-cats-hidden';
 553                         }
 554
 555                         $s .= "<div id=\"mw-hidden-catlinks\" class=\"mw-hidden-catlinks$class\">" .
 556                                 $this->msg( 'hidden-categories' )->numParams( count( $allCats['hidden'] ) )->escaped() .
 557                                 $colon . '<ul>' . $embed . implode( "{$pop}{$embed}", $allCats['hidden'] ) . $pop . '</ul>' .
 558                                 '</div>';
 559                 }
 560
 561                 # optional 'dmoz-like' category browser. Will be shown under the list
 562                 # of categories an article belong to
 563                 if ( $wgUseCategoryBrowser ) {
 564                         $s .= '<br /><hr />';
 565
 566                         # get a big array of the parents tree
 567                         $parenttree = $this->getTitle()->getParentCategoryTree();
 568                         # Skin object passed by reference cause it can not be
 569                         # accessed under the method subfunction drawCategoryBrowser
 570                         $tempout = explode( "\n", $this->drawCategoryBrowser( $parenttree ) );
 571                         # Clean out bogus first entry and sort them
 572                         unset( $tempout[0] );
 573                         asort( $tempout );
 574                         # Output one per line
 575                         $s .= implode( "<br />\n", $tempout );
 576                 }
 577
 578                 return $s;
 579         }
 580
 581         /**
 582          * Render the array as a series of links.
 583          * @param array $tree Categories tree returned by Title::getParentCategoryTree
 584          * @return string Separated by &gt;, terminate with "\n"
 585          */
 586         function drawCategoryBrowser( $tree ) {
 587                 $return = '';
 588
 589                 foreach ( $tree as $element => $parent ) {
 590                         if ( empty( $parent ) ) {
 591                                 # element start a new list
 592                                 $return .= "\n";
 593                         } else {
 594                                 # grab the others elements
 595                                 $return .= $this->drawCategoryBrowser( $parent ) . ' &gt; ';
 596                         }
 597
 598                         # add our current element to the list
 599                         $eltitle = Title::newFromText( $element );
 600                         $return .= Linker::link( $eltitle, htmlspecialchars( $eltitle->getText() ) );
 601                 }
 602
 603                 return $return;
 604         }
 605
 606         /**
 607          * @return string HTML
 608          */
 609         function getCategories() {
 610                 $out = $this->getOutput();
 611                 $catlinks = $this->getCategoryLinks();
 612
 613                 // Check what we're showing
 614                 $allCats = $out->getCategoryLinks();
 615                 $showHidden = $this->getUser()->getBoolOption( 'showhiddencats' ) ||
 616                                                 $this->getTitle()->getNamespace() == NS_CATEGORY;
 617
 618                 $classes = [ 'catlinks' ];
 619                 if ( empty( $allCats['normal'] ) && !( !empty( $allCats['hidden'] ) && $showHidden ) ) {
 620                         $classes[] = 'catlinks-allhidden';
 621                 }
 622
 623                 return Html::rawElement(
 624                         'div',
 625                         [ 'id' => 'catlinks', 'class' => $classes, 'data-mw' => 'interface' ],
 626                         $catlinks
 627                 );
 628         }
 629
 630         /**
 631          * This runs a hook to allow extensions placing their stuff after content
 632          * and article metadata (e.g. categories).
 633          * Note: This function has nothing to do with afterContent().
 634          *
 635          * This hook is placed here in order to allow using the same hook for all
 636          * skins, both the SkinTemplate based ones and the older ones, which directly
 637          * use this class to get their data.
 638          *
 639          * The output of this function gets processed in SkinTemplate::outputPage() for
 640          * the SkinTemplate based skins, all other skins should directly echo it.
 641          *
 642          * @return string Empty by default, if not changed by any hook function.
 643          */
 644         protected function afterContentHook() {
 645                 $data = '';
 646
 647                 if ( Hooks::run( 'SkinAfterContent', [ &$data, $this ] ) ) {
 648                         // adding just some spaces shouldn't toggle the output
 649                         // of the whole <div/>, so we use trim() here
 650                         if ( trim( $data ) != '' ) {
 651                                 // Doing this here instead of in the skins to
 652                                 // ensure that the div has the same ID in all
 653                                 // skins
 654                                 $data = "<div id='mw-data-after-content'>\n" .
 655                                         "\t$data\n" .
 656                                         "</div>\n";
 657                         }
 658                 } else {
 659                         wfDebug( "Hook SkinAfterContent changed output processing.\n" );
 660                 }
 661
 662                 return $data;
 663         }
 664
 665         /**
 666          * Generate debug data HTML for displaying at the bottom of the main content
 667          * area.
 668          * @return string HTML containing debug data, if enabled (otherwise empty).
 669          */
 670         protected function generateDebugHTML() {
 671                 return MWDebug::getHTMLDebugLog();
 672         }
 673
 674         /**
 675          * This gets called shortly before the "</body>" tag.
 676          *
 677          * @return string HTML-wrapped JS code to be put before "</body>"
 678          */
 679         function bottomScripts() {
 680                 // TODO and the suckage continues. This function is really just a wrapper around
 681                 // OutputPage::getBottomScripts() which takes a Skin param. This should be cleaned
 682                 // up at some point
 683                 $bottomScriptText = $this->getOutput()->getBottomScripts();
 684                 Hooks::run( 'SkinAfterBottomScripts', [ $this, &$bottomScriptText ] );
 685
 686                 return $bottomScriptText;
 687         }
 688
 689         /**
 690          * Text with the permalink to the source page,
 691          * usually shown on the footer of a printed page
 692          *
 693          * @return string HTML text with an URL
 694          */
 695         function printSource() {
 696                 $oldid = $this->getRevisionId();
 697                 if ( $oldid ) {
 698                         $canonicalUrl = $this->getTitle()->getCanonicalURL( 'oldid=' . $oldid );
 699                         $url = htmlspecialchars( wfExpandIRI( $canonicalUrl ) );
 700                 } else {
 701                         // oldid not available for non existing pages
 702                         $url = htmlspecialchars( wfExpandIRI( $this->getTitle()->getCanonicalURL() ) );
 703                 }
 704
 705                 return $this->msg( 'retrievedfrom' )
 706                         ->rawParams( '<a dir="ltr" href="' . $url . '">' . $url . '</a>' )
 707                         ->parse();
 708         }
 709
 710         /**
 711          * @return string HTML
 712          */
 713         function getUndeleteLink() {
 714                 $action = $this->getRequest()->getVal( 'action', 'view' );
 715
 716                 if ( $this->getTitle()->userCan( 'deletedhistory', $this->getUser() ) &&
 717                         ( !$this->getTitle()->exists() || $action == 'history' ) ) {
 718                         $n = $this->getTitle()->isDeleted();
 719
 720                         if ( $n ) {
 721                                 if ( $this->getTitle()->quickUserCan( 'undelete', $this->getUser() ) ) {
 722                                         $msg = 'thisisdeleted';
 723                                 } else {
 724                                         $msg = 'viewdeleted';
 725                                 }
 726
 727                                 return $this->msg( $msg )->rawParams(
 728                                         Linker::linkKnown(
 729                                                 SpecialPage::getTitleFor( 'Undelete', $this->getTitle()->getPrefixedDBkey() ),
 730                                                 $this->msg( 'restorelink' )->numParams( $n )->escaped() )
 731                                         )->escaped();
 732                         }
 733                 }
 734
 735                 return '';
 736         }
 737
 738         /**
 739          * @param OutputPage $out Defaults to $this->getOutput() if left as null
 740          * @return string
 741          */
 742         function subPageSubtitle( $out = null ) {
 743                 if ( $out === null ) {
 744                         $out = $this->getOutput();
 745                 }
 746                 $title = $out->getTitle();
 747                 $subpages = '';
 748
 749                 if ( !Hooks::run( 'SkinSubPageSubtitle', [ &$subpages, $this, $out ] ) ) {
 750                         return $subpages;
 751                 }
 752
 753                 if ( $out->isArticle() && MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 754                         $ptext = $title->getPrefixedText();
 755                         if ( strpos( $ptext, '/' ) !== false ) {
 756                                 $links = explode( '/', $ptext );
 757                                 array_pop( $links );
 758                                 $c = 0;
 759                                 $growinglink = '';
 760                                 $display = '';
 761                                 $lang = $this->getLanguage();
 762
 763                                 foreach ( $links as $link ) {
 764                                         $growinglink .= $link;
 765                                         $display .= $link;
 766                                         $linkObj = Title::newFromText( $growinglink );
 767
 768                                         if ( is_object( $linkObj ) && $linkObj->isKnown() ) {
 769                                                 $getlink = Linker::linkKnown(
 770                                                         $linkObj,
 771                                                         htmlspecialchars( $display )
 772                                                 );
 773
 774                                                 $c++;
 775
 776                                                 if ( $c > 1 ) {
 777                                                         $subpages .= $lang->getDirMarkEntity() . $this->msg( 'pipe-separator' )->escaped();
 778                                                 } else {
 779                                                         $subpages .= '&lt; ';
 780                                                 }
 781
 782                                                 $subpages .= $getlink;
 783                                                 $display = '';
 784                                         } else {
 785                                                 $display .= '/';
 786                                         }
 787                                         $growinglink .= '/';
 788                                 }
 789                         }
 790                 }
 791
 792                 return $subpages;
 793         }
 794
 795         /**
 796          * @return string
 797          */
 798         function getSearchLink() {
 799                 $searchPage = SpecialPage::getTitleFor( 'Search' );
 800                 return $searchPage->getLocalURL();
 801         }
 802
 803         /**
 804          * @return string
 805          */
 806         function escapeSearchLink() {
 807                 return htmlspecialchars( $this->getSearchLink() );
 808         }
 809
 810         /**
 811          * @param string $type
 812          * @return string
 813          */
 814         function getCopyright( $type = 'detect' ) {
 815                 global $wgRightsPage, $wgRightsUrl, $wgRightsText;
 816
 817                 if ( $type == 'detect' ) {
 818                         if ( !$this->isRevisionCurrent()
 819                                 && !$this->msg( 'history_copyright' )->inContentLanguage()->isDisabled()
 820                         ) {
 821                                 $type = 'history';
 822                         } else {
 823                                 $type = 'normal';
 824                         }
 825                 }
 826
 827                 if ( $type == 'history' ) {
 828                         $msg = 'history_copyright';
 829                 } else {
 830                         $msg = 'copyright';
 831                 }
 832
 833                 if ( $wgRightsPage ) {
 834                         $title = Title::newFromText( $wgRightsPage );
 835                         $link = Linker::linkKnown( $title, $wgRightsText );
 836                 } elseif ( $wgRightsUrl ) {
 837                         $link = Linker::makeExternalLink( $wgRightsUrl, $wgRightsText );
 838                 } elseif ( $wgRightsText ) {
 839                         $link = $wgRightsText;
 840                 } else {
 841                         # Give up now
 842                         return '';
 843                 }
 844
 845                 // Allow for site and per-namespace customization of copyright notice.
 846                 // @todo Remove deprecated $forContent param from hook handlers and then remove here.
 847                 $forContent = true;
 848
 849                 Hooks::run(
 850                         'SkinCopyrightFooter',
 851                         [ $this->getTitle(), $type, &$msg, &$link, &$forContent ]
 852                 );
 853
 854                 return $this->msg( $msg )->rawParams( $link )->text();
 855         }
 856
 857         /**
 858          * @return null|string
 859          */
 860         function getCopyrightIcon() {
 861                 global $wgRightsUrl, $wgRightsText, $wgRightsIcon, $wgFooterIcons;
 862
 863                 $out = '';
 864
 865                 if ( $wgFooterIcons['copyright']['copyright'] ) {
 866                         $out = $wgFooterIcons['copyright']['copyright'];
 867                 } elseif ( $wgRightsIcon ) {
 868                         $icon = htmlspecialchars( $wgRightsIcon );
 869
 870                         if ( $wgRightsUrl ) {
 871                                 $url = htmlspecialchars( $wgRightsUrl );
 872                                 $out .= '<a href="' . $url . '">';
 873                         }
 874
 875                         $text = htmlspecialchars( $wgRightsText );
 876                         $out .= "<img src=\"$icon\" alt=\"$text\" width=\"88\" height=\"31\" />";
 877
 878                         if ( $wgRightsUrl ) {
 879                                 $out .= '</a>';
 880                         }
 881                 }
 882
 883                 return $out;
 884         }
 885
 886         /**
 887          * Gets the powered by MediaWiki icon.
 888          * @return string
 889          */
 890         function getPoweredBy() {
 891                 global $wgResourceBasePath;
 892
 893                 $url1 = htmlspecialchars(
 894                         "$wgResourceBasePath/resources/assets/poweredby_mediawiki_88x31.png"
 895                 );
 896                 $url1_5 = htmlspecialchars(
 897                         "$wgResourceBasePath/resources/assets/poweredby_mediawiki_132x47.png"
 898                 );
 899                 $url2 = htmlspecialchars(
 900                         "$wgResourceBasePath/resources/assets/poweredby_mediawiki_176x62.png"
 901                 );
 902                 $text = '<a href="//www.mediawiki.org/"><img src="' . $url1
 903                         . '" srcset="' . $url1_5 . ' 1.5x, ' . $url2 . ' 2x" '
 904                         . 'height="31" width="88" alt="Powered by MediaWiki" /></a>';
 905                 Hooks::run( 'SkinGetPoweredBy', [ &$text, $this ] );
 906                 return $text;
 907         }
 908
 909         /**
 910          * Get the timestamp of the latest revision, formatted in user language
 911          *
 912          * @return string
 913          */
 914         protected function lastModified() {
 915                 $timestamp = $this->getOutput()->getRevisionTimestamp();
 916
 917                 # No cached timestamp, load it from the database
 918                 if ( $timestamp === null ) {
 919                         $timestamp = Revision::getTimestampFromId( $this->getTitle(), $this->getRevisionId() );
 920                 }
 921
 922                 if ( $timestamp ) {
 923                         $d = $this->getLanguage()->userDate( $timestamp, $this->getUser() );
 924                         $t = $this->getLanguage()->userTime( $timestamp, $this->getUser() );
 925                         $s = ' ' . $this->msg( 'lastmodifiedat', $d, $t )->parse();
 926                 } else {
 927                         $s = '';
 928                 }
 929
 930                 if ( MediaWikiServices::getInstance()->getDBLoadBalancer()->getLaggedReplicaMode() ) {
 931                         $s .= ' <strong>' . $this->msg( 'laggedslavemode' )->parse() . '</strong>';
 932                 }
 933
 934                 return $s;
 935         }
 936
 937         /**
 938          * @param string $align
 939          * @return string
 940          */
 941         function logoText( $align = '' ) {
 942                 if ( $align != '' ) {
 943                         $a = " style='float: {$align};'";
 944                 } else {
 945                         $a = '';
 946                 }
 947
 948                 $mp = $this->msg( 'mainpage' )->escaped();
 949                 $mptitle = Title::newMainPage();
 950                 $url = ( is_object( $mptitle ) ? htmlspecialchars( $mptitle->getLocalURL() ) : '' );
 951
 952                 $logourl = $this->getLogo();
 953                 $s = "<a href='{$url}'><img{$a} src='{$logourl}' alt='[{$mp}]' /></a>";
 954
 955                 return $s;
 956         }
 957
 958         /**
 959          * Renders a $wgFooterIcons icon according to the method's arguments
 960          * @param array $icon The icon to build the html for, see $wgFooterIcons
 961          *   for the format of this array.
 962          * @param bool|string $withImage Whether to use the icon's image or output
 963          *   a text-only footericon.
 964          * @return string HTML
 965          */
 966         function makeFooterIcon( $icon, $withImage = 'withImage' ) {
 967                 if ( is_string( $icon ) ) {
 968                         $html = $icon;
 969                 } else { // Assuming array
 970                         $url = isset( $icon["url"] ) ? $icon["url"] : null;
 971                         unset( $icon["url"] );
 972                         if ( isset( $icon["src"] ) && $withImage === 'withImage' ) {
 973                                 // do this the lazy way, just pass icon data as an attribute array
 974                                 $html = Html::element( 'img', $icon );
 975                         } else {
 976                                 $html = htmlspecialchars( $icon["alt"] );
 977                         }
 978                         if ( $url ) {
 979                                 global $wgExternalLinkTarget;
 980                                 $html = Html::rawElement( 'a',
 981                                         [ "href" => $url, "target" => $wgExternalLinkTarget ],
 982                                         $html );
 983                         }
 984                 }
 985                 return $html;
 986         }
 987
 988         /**
 989          * Gets the link to the wiki's main page.
 990          * @return string
 991          */
 992         function mainPageLink() {
 993                 $s = Linker::linkKnown(
 994                         Title::newMainPage(),
 995                         $this->msg( 'mainpage' )->escaped()
 996                 );
 997
 998                 return $s;
 999         }
1000
1001         /**
1002          * Returns an HTML link for use in the footer
1003          * @param string $desc The i18n message key for the link text
1004          * @param string $page The i18n message key for the page to link to
1005          * @return string HTML anchor
1006          */
1007         public function footerLink( $desc, $page ) {
1008                 $title = $this->footerLinkTitle( $desc, $page );
1009                 if ( !$title ) {
1010                         return '';
1011                 }
1012
1013                 return Linker::linkKnown(
1014                         $title,
1015                         $this->msg( $desc )->escaped()
1016                 );
1017         }
1018
1019         /**
1020          * @param string $desc
1021          * @param string $page
1022          * @return Title|null
1023          */
1024         private function footerLinkTitle( $desc, $page ) {
1025                 // If the link description has been set to "-" in the default language,
1026                 if ( $this->msg( $desc )->inContentLanguage()->isDisabled() ) {
1027                         // then it is disabled, for all languages.
1028                         return null;
1029                 }
1030                 // Otherwise, we display the link for the user, described in their
1031                 // language (which may or may not be the same as the default language),
1032                 // but we make the link target be the one site-wide page.
1033                 $title = Title::newFromText( $this->msg( $page )->inContentLanguage()->text() );
1034
1035                 return $title ?: null;
1036         }
1037
1038         /**
1039          * Gets the link to the wiki's privacy policy page.
1040          * @return string HTML
1041          */
1042         function privacyLink() {
1043                 return $this->footerLink( 'privacy', 'privacypage' );
1044         }
1045
1046         /**
1047          * Gets the link to the wiki's about page.
1048          * @return string HTML
1049          */
1050         function aboutLink() {
1051                 return $this->footerLink( 'aboutsite', 'aboutpage' );
1052         }
1053
1054         /**
1055          * Gets the link to the wiki's general disclaimers page.
1056          * @return string HTML
1057          */
1058         function disclaimerLink() {
1059                 return $this->footerLink( 'disclaimers', 'disclaimerpage' );
1060         }
1061
1062         /**
1063          * Return URL options for the 'edit page' link.
1064          * This may include an 'oldid' specifier, if the current page view is such.
1065          *
1066          * @return array
1067          * @private
1068          */
1069         function editUrlOptions() {
1070                 $options = [ 'action' => 'edit' ];
1071
1072                 if ( !$this->isRevisionCurrent() ) {
1073                         $options['oldid'] = intval( $this->getRevisionId() );
1074                 }
1075
1076                 return $options;
1077         }
1078
1079         /**
1080          * @param User|int $id
1081          * @return bool
1082          */
1083         function showEmailUser( $id ) {
1084                 if ( $id instanceof User ) {
1085                         $targetUser = $id;
1086                 } else {
1087                         $targetUser = User::newFromId( $id );
1088                 }
1089
1090                 # The sending user must have a confirmed email address and the receiving
1091                 # user must accept emails from the sender.
1092                 return $this->getUser()->canSendEmail()
1093                         && SpecialEmailUser::validateTarget( $targetUser, $this->getUser() ) === '';
1094         }
1095
1096         /**
1097          * Return a fully resolved style path url to images or styles stored in the current skins's folder.
1098          * This method returns a url resolved using the configured skin style path
1099          * and includes the style version inside of the url.
1100          *
1101          * Requires $stylename to be set, otherwise throws MWException.
1102          *
1103          * @param string $name The name or path of a skin resource file
1104          * @return string The fully resolved style path url including styleversion
1105          * @throws MWException
1106          */
1107         function getSkinStylePath( $name ) {
1108                 global $wgStylePath, $wgStyleVersion;
1109
1110                 if ( $this->stylename === null ) {
1111                         $class = static::class;
1112                         throw new MWException( "$class::\$stylename must be set to use getSkinStylePath()" );
1113                 }
1114
1115                 return "$wgStylePath/{$this->stylename}/$name?$wgStyleVersion";
1116         }
1117
1118         /* these are used extensively in SkinTemplate, but also some other places */
1119
1120         /**
1121          * @param string|string[] $urlaction
1122          * @return string
1123          */
1124         static function makeMainPageUrl( $urlaction = '' ) {
1125                 $title = Title::newMainPage();
1126                 self::checkTitle( $title, '' );
1127
1128                 return $title->getLinkURL( $urlaction );
1129         }
1130
1131         /**
1132          * Make a URL for a Special Page using the given query and protocol.
1133          *
1134          * If $proto is set to null, make a local URL. Otherwise, make a full
1135          * URL with the protocol specified.
1136          *
1137          * @param string $name Name of the Special page
1138          * @param string|string[] $urlaction Query to append
1139          * @param string|null $proto Protocol to use or null for a local URL
1140          * @return string
1141          */
1142         static function makeSpecialUrl( $name, $urlaction = '', $proto = null ) {
1143                 $title = SpecialPage::getSafeTitleFor( $name );
1144                 if ( is_null( $proto ) ) {
1145                         return $title->getLocalURL( $urlaction );
1146                 } else {
1147                         return $title->getFullURL( $urlaction, false, $proto );
1148                 }
1149         }
1150
1151         /**
1152          * @param string $name
1153          * @param string $subpage
1154          * @param string|string[] $urlaction
1155          * @return string
1156          */
1157         static function makeSpecialUrlSubpage( $name, $subpage, $urlaction = '' ) {
1158                 $title = SpecialPage::getSafeTitleFor( $name, $subpage );
1159                 return $title->getLocalURL( $urlaction );
1160         }
1161
1162         /**
1163          * @param string $name
1164          * @param string|string[] $urlaction
1165          * @return string
1166          */
1167         static function makeI18nUrl( $name, $urlaction = '' ) {
1168                 $title = Title::newFromText( wfMessage( $name )->inContentLanguage()->text() );
1169                 self::checkTitle( $title, $name );
1170                 return $title->getLocalURL( $urlaction );
1171         }
1172
1173         /**
1174          * @param string $name
1175          * @param string|string[] $urlaction
1176          * @return string
1177          */
1178         static function makeUrl( $name, $urlaction = '' ) {
1179                 $title = Title::newFromText( $name );
1180                 self::checkTitle( $title, $name );
1181
1182                 return $title->getLocalURL( $urlaction );
1183         }
1184
1185         /**
1186          * If url string starts with http, consider as external URL, else
1187          * internal
1188          * @param string $name
1189          * @return string URL
1190          */
1191         static function makeInternalOrExternalUrl( $name ) {
1192                 if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $name ) ) {
1193                         return $name;
1194                 } else {
1195                         return self::makeUrl( $name );
1196                 }
1197         }
1198
1199         /**
1200          * this can be passed the NS number as defined in Language.php
1201          * @param string $name
1202          * @param string|string[] $urlaction
1203          * @param int $namespace
1204          * @return string
1205          */
1206         static function makeNSUrl( $name, $urlaction = '', $namespace = NS_MAIN ) {
1207                 $title = Title::makeTitleSafe( $namespace, $name );
1208                 self::checkTitle( $title, $name );
1209
1210                 return $title->getLocalURL( $urlaction );
1211         }
1212
1213         /**
1214          * these return an array with the 'href' and boolean 'exists'
1215          * @param string $name
1216          * @param string|string[] $urlaction
1217          * @return array
1218          */
1219         static function makeUrlDetails( $name, $urlaction = '' ) {
1220                 $title = Title::newFromText( $name );
1221                 self::checkTitle( $title, $name );
1222
1223                 return [
1224                         'href' => $title->getLocalURL( $urlaction ),
1225                         'exists' => $title->isKnown(),
1226                 ];
1227         }
1228
1229         /**
1230          * Make URL details where the article exists (or at least it's convenient to think so)
1231          * @param string $name Article name
1232          * @param string|string[] $urlaction
1233          * @return array
1234          */
1235         static function makeKnownUrlDetails( $name, $urlaction = '' ) {
1236                 $title = Title::newFromText( $name );
1237                 self::checkTitle( $title, $name );
1238
1239                 return [
1240                         'href' => $title->getLocalURL( $urlaction ),
1241                         'exists' => true
1242                 ];
1243         }
1244
1245         /**
1246          * make sure we have some title to operate on
1247          *
1248          * @param Title &$title
1249          * @param string $name
1250          */
1251         static function checkTitle( &$title, $name ) {
1252                 if ( !is_object( $title ) ) {
1253                         $title = Title::newFromText( $name );
1254                         if ( !is_object( $title ) ) {
1255                                 $title = Title::newFromText( '--error: link target missing--' );
1256                         }
1257                 }
1258         }
1259
1260         /**
1261          * Build an array that represents the sidebar(s), the navigation bar among them.
1262          *
1263          * BaseTemplate::getSidebar can be used to simplify the format and id generation in new skins.
1264          *
1265          * The format of the returned array is [ heading => content, ... ], where:
1266          * - heading is the heading of a navigation portlet. It is either:
1267          *   - magic string to be handled by the skins ('SEARCH' / 'LANGUAGES' / 'TOOLBOX' / ...)
1268          *   - a message name (e.g. 'navigation'), the message should be HTML-escaped by the skin
1269          *   - plain text, which should be HTML-escaped by the skin
1270          * - content is the contents of the portlet. It is either:
1271          *   - HTML text (<ul><li>...</li>...</ul>)
1272          *   - array of link data in a format accepted by BaseTemplate::makeListItem()
1273          *   - (for a magic string as a key, any value)
1274          *
1275          * Note that extensions can control the sidebar contents using the SkinBuildSidebar hook
1276          * and can technically insert anything in here; skin creators are expected to handle
1277          * values described above.
1278          *
1279          * @return array
1280          */
1281         public function buildSidebar() {
1282                 global $wgEnableSidebarCache, $wgSidebarCacheExpiry;
1283
1284                 $callback = function ( $old = null, &$ttl = null ) {
1285                         $bar = [];
1286                         $this->addToSidebar( $bar, 'sidebar' );
1287                         Hooks::run( 'SkinBuildSidebar', [ $this, &$bar ] );
1288                         if ( MessageCache::singleton()->isDisabled() ) {
1289                                 $ttl = WANObjectCache::TTL_UNCACHEABLE; // bug T133069
1290                         }
1291
1292                         return $bar;
1293                 };
1294
1295                 $msgCache = MessageCache::singleton();
1296                 $wanCache = MediaWikiServices::getInstance()->getMainWANObjectCache();
1297
1298                 $sidebar = $wgEnableSidebarCache
1299                         ? $wanCache->getWithSetCallback(
1300                                 $wanCache->makeKey( 'sidebar', $this->getLanguage()->getCode() ),
1301                                 $wgSidebarCacheExpiry,
1302                                 $callback,
1303                                 [
1304                                         'checkKeys' => [
1305                                                 // Unless there is both no exact $code override nor an i18n definition
1306                                                 // in the the software, the only MediaWiki page to check is for $code.
1307                                                 $msgCache->getCheckKey( $this->getLanguage()->getCode() )
1308                                         ],
1309                                         'lockTSE' => 30
1310                                 ]
1311                         )
1312                         : $callback();
1313
1314                 // Apply post-processing to the cached value
1315                 Hooks::run( 'SidebarBeforeOutput', [ $this, &$sidebar ] );
1316
1317                 return $sidebar;
1318         }
1319
1320         /**
1321          * Add content from a sidebar system message
1322          * Currently only used for MediaWiki:Sidebar (but may be used by Extensions)
1323          *
1324          * This is just a wrapper around addToSidebarPlain() for backwards compatibility
1325          *
1326          * @param array &$bar
1327          * @param string $message
1328          */
1329         public function addToSidebar( &$bar, $message ) {
1330                 $this->addToSidebarPlain( $bar, wfMessage( $message )->inContentLanguage()->plain() );
1331         }
1332
1333         /**
1334          * Add content from plain text
1335          * @since 1.17
1336          * @param array &$bar
1337          * @param string $text
1338          * @return array
1339          */
1340         function addToSidebarPlain( &$bar, $text ) {
1341                 $lines = explode( "\n", $text );
1342
1343                 $heading = '';
1344                 $messageTitle = $this->getConfig()->get( 'EnableSidebarCache' )
1345                         ? Title::newMainPage() : $this->getTitle();
1346
1347                 foreach ( $lines as $line ) {
1348                         if ( strpos( $line, '*' ) !== 0 ) {
1349                                 continue;
1350                         }
1351                         $line = rtrim( $line, "\r" ); // for Windows compat
1352
1353                         if ( strpos( $line, '**' ) !== 0 ) {
1354                                 $heading = trim( $line, '* ' );
1355                                 if ( !array_key_exists( $heading, $bar ) ) {
1356                                         $bar[$heading] = [];
1357                                 }
1358                         } else {
1359                                 $line = trim( $line, '* ' );
1360
1361                                 if ( strpos( $line, '|' ) !== false ) { // sanity check
1362                                         $line = MessageCache::singleton()->transform( $line, false, null, $messageTitle );
1363                                         $line = array_map( 'trim', explode( '|', $line, 2 ) );
1364                                         if ( count( $line ) !== 2 ) {
1365                                                 // Second sanity check, could be hit by people doing
1366                                                 // funky stuff with parserfuncs... (T35321)
1367                                                 continue;
1368                                         }
1369
1370                                         $extraAttribs = [];
1371
1372                                         $msgLink = $this->msg( $line[0] )->title( $messageTitle )->inContentLanguage();
1373                                         if ( $msgLink->exists() ) {
1374                                                 $link = $msgLink->text();
1375                                                 if ( $link == '-' ) {
1376                                                         continue;
1377                                                 }
1378                                         } else {
1379                                                 $link = $line[0];
1380                                         }
1381                                         $msgText = $this->msg( $line[1] )->title( $messageTitle );
1382                                         if ( $msgText->exists() ) {
1383                                                 $text = $msgText->text();
1384                                         } else {
1385                                                 $text = $line[1];
1386                                         }
1387
1388                                         if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $link ) ) {
1389                                                 $href = $link;
1390
1391                                                 // Parser::getExternalLinkAttribs won't work here because of the Namespace things
1392                                                 global $wgNoFollowLinks, $wgNoFollowDomainExceptions;
1393                                                 if ( $wgNoFollowLinks && !wfMatchesDomainList( $href, $wgNoFollowDomainExceptions ) ) {
1394                                                         $extraAttribs['rel'] = 'nofollow';
1395                                                 }
1396
1397                                                 global $wgExternalLinkTarget;
1398                                                 if ( $wgExternalLinkTarget ) {
1399                                                         $extraAttribs['target'] = $wgExternalLinkTarget;
1400                                                 }
1401                                         } else {
1402                                                 $title = Title::newFromText( $link );
1403
1404                                                 if ( $title ) {
1405                                                         $title = $title->fixSpecialName();
1406                                                         $href = $title->getLinkURL();
1407                                                 } else {
1408                                                         $href = 'INVALID-TITLE';
1409                                                 }
1410                                         }
1411
1412                                         $bar[$heading][] = array_merge( [
1413                                                 'text' => $text,
1414                                                 'href' => $href,
1415                                                 'id' => Sanitizer::escapeIdForAttribute( 'n-' . strtr( $line[1], ' ', '-' ) ),
1416                                                 'active' => false,
1417                                         ], $extraAttribs );
1418                                 } else {
1419                                         continue;
1420                                 }
1421                         }
1422                 }
1423
1424                 return $bar;
1425         }
1426
1427         /**
1428          * Gets new talk page messages for the current user and returns an
1429          * appropriate alert message (or an empty string if there are no messages)
1430          * @return string
1431          */
1432         function getNewtalks() {
1433                 $newMessagesAlert = '';
1434                 $user = $this->getUser();
1435                 $newtalks = $user->getNewMessageLinks();
1436                 $out = $this->getOutput();
1437
1438                 // Allow extensions to disable or modify the new messages alert
1439                 if ( !Hooks::run( 'GetNewMessagesAlert', [ &$newMessagesAlert, $newtalks, $user, $out ] ) ) {
1440                         return '';
1441                 }
1442                 if ( $newMessagesAlert ) {
1443                         return $newMessagesAlert;
1444                 }
1445
1446                 if ( count( $newtalks ) == 1 && $newtalks[0]['wiki'] === wfWikiID() ) {
1447                         $uTalkTitle = $user->getTalkPage();
1448                         $lastSeenRev = isset( $newtalks[0]['rev'] ) ? $newtalks[0]['rev'] : null;
1449                         $nofAuthors = 0;
1450                         if ( $lastSeenRev !== null ) {
1451                                 $plural = true; // Default if we have a last seen revision: if unknown, use plural
1452                                 $latestRev = Revision::newFromTitle( $uTalkTitle, false, Revision::READ_NORMAL );
1453                                 if ( $latestRev !== null ) {
1454                                         // Singular if only 1 unseen revision, plural if several unseen revisions.
1455                                         $plural = $latestRev->getParentId() !== $lastSeenRev->getId();
1456                                         $nofAuthors = $uTalkTitle->countAuthorsBetween(
1457                                                 $lastSeenRev, $latestRev, 10, 'include_new' );
1458                                 }
1459                         } else {
1460                                 // Singular if no revision -> diff link will show latest change only in any case
1461                                 $plural = false;
1462                         }
1463                         $plural = $plural ? 999 : 1;
1464                         // 999 signifies "more than one revision". We don't know how many, and even if we did,
1465                         // the number of revisions or authors is not necessarily the same as the number of
1466                         // "messages".
1467                         $newMessagesLink = Linker::linkKnown(
1468                                 $uTalkTitle,
1469                                 $this->msg( 'newmessageslinkplural' )->params( $plural )->escaped(),
1470                                 [],
1471                                 [ 'redirect' => 'no' ]
1472                         );
1473
1474                         $newMessagesDiffLink = Linker::linkKnown(
1475                                 $uTalkTitle,
1476                                 $this->msg( 'newmessagesdifflinkplural' )->params( $plural )->escaped(),
1477                                 [],
1478                                 $lastSeenRev !== null
1479                                         ? [ 'oldid' => $lastSeenRev->getId(), 'diff' => 'cur' ]
1480                                         : [ 'diff' => 'cur' ]
1481                         );
1482
1483                         if ( $nofAuthors >= 1 && $nofAuthors <= 10 ) {
1484                                 $newMessagesAlert = $this->msg(
1485                                         'youhavenewmessagesfromusers',
1486                                         $newMessagesLink,
1487                                         $newMessagesDiffLink
1488                                 )->numParams( $nofAuthors, $plural );
1489                         } else {
1490                                 // $nofAuthors === 11 signifies "11 or more" ("more than 10")
1491                                 $newMessagesAlert = $this->msg(
1492                                         $nofAuthors > 10 ? 'youhavenewmessagesmanyusers' : 'youhavenewmessages',
1493                                         $newMessagesLink,
1494                                         $newMessagesDiffLink
1495                                 )->numParams( $plural );
1496                         }
1497                         $newMessagesAlert = $newMessagesAlert->text();
1498                         # Disable CDN cache
1499                         $out->setCdnMaxage( 0 );
1500                 } elseif ( count( $newtalks ) ) {
1501                         $sep = $this->msg( 'newtalkseparator' )->escaped();
1502                         $msgs = [];
1503
1504                         foreach ( $newtalks as $newtalk ) {
1505                                 $msgs[] = Xml::element(
1506                                         'a',
1507                                         [ 'href' => $newtalk['link'] ], $newtalk['wiki']
1508                                 );
1509                         }
1510                         $parts = implode( $sep, $msgs );
1511                         $newMessagesAlert = $this->msg( 'youhavenewmessagesmulti' )->rawParams( $parts )->escaped();
1512                         $out->setCdnMaxage( 0 );
1513                 }
1514
1515                 return $newMessagesAlert;
1516         }
1517
1518         /**
1519          * Get a cached notice
1520          *
1521          * @param string $name Message name, or 'default' for $wgSiteNotice
1522          * @return string|bool HTML fragment, or false to indicate that the caller
1523          *   should fall back to the next notice in its sequence
1524          */
1525         private function getCachedNotice( $name ) {
1526                 global $wgRenderHashAppend, $wgContLang;
1527
1528                 $needParse = false;
1529
1530                 if ( $name === 'default' ) {
1531                         // special case
1532                         global $wgSiteNotice;
1533                         $notice = $wgSiteNotice;
1534                         if ( empty( $notice ) ) {
1535                                 return false;
1536                         }
1537                 } else {
1538                         $msg = $this->msg( $name )->inContentLanguage();
1539                         if ( $msg->isBlank() ) {
1540                                 return '';
1541                         } elseif ( $msg->isDisabled() ) {
1542                                 return false;
1543                         }
1544                         $notice = $msg->plain();
1545                 }
1546
1547                 $cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
1548                 $parsed = $cache->getWithSetCallback(
1549                         // Use the extra hash appender to let eg SSL variants separately cache
1550                         // Key is verified with md5 hash of unparsed wikitext
1551                         $cache->makeKey( $name, $wgRenderHashAppend, md5( $notice ) ),
1552                         // TTL in seconds
1553                         600,
1554                         function () use ( $notice ) {
1555                                 return $this->getOutput()->parse( $notice );
1556                         }
1557                 );
1558
1559                 return Html::rawElement(
1560                         'div',
1561                         [
1562                                 'id' => 'localNotice',
1563                                 'lang' => $wgContLang->getHtmlCode(),
1564                                 'dir' => $wgContLang->getDir()
1565                         ],
1566                         $parsed
1567                 );
1568         }
1569
1570         /**
1571          * Get the site notice
1572          *
1573          * @return string HTML fragment
1574          */
1575         function getSiteNotice() {
1576                 $siteNotice = '';
1577
1578                 if ( Hooks::run( 'SiteNoticeBefore', [ &$siteNotice, $this ] ) ) {
1579                         if ( is_object( $this->getUser() ) && $this->getUser()->isLoggedIn() ) {
1580                                 $siteNotice = $this->getCachedNotice( 'sitenotice' );
1581                         } else {
1582                                 $anonNotice = $this->getCachedNotice( 'anonnotice' );
1583                                 if ( $anonNotice === false ) {
1584                                         $siteNotice = $this->getCachedNotice( 'sitenotice' );
1585                                 } else {
1586                                         $siteNotice = $anonNotice;
1587                                 }
1588                         }
1589                         if ( $siteNotice === false ) {
1590                                 $siteNotice = $this->getCachedNotice( 'default' );
1591                         }
1592                 }
1593
1594                 Hooks::run( 'SiteNoticeAfter', [ &$siteNotice, $this ] );
1595                 return $siteNotice;
1596         }
1597
1598         /**
1599          * Create a section edit link.  This supersedes editSectionLink() and
1600          * editSectionLinkForOther().
1601          *
1602          * @param Title $nt The title being linked to (may not be the same as
1603          *   the current page, if the section is included from a template)
1604          * @param string $section The designation of the section being pointed to,
1605          *   to be included in the link, like "&section=$section"
1606          * @param string $tooltip The tooltip to use for the link: will be escaped
1607          *   and wrapped in the 'editsectionhint' message
1608          * @param string $lang Language code
1609          * @return string HTML to use for edit link
1610          */
1611         public function doEditSectionLink( Title $nt, $section, $tooltip = null, $lang = false ) {
1612                 // HTML generated here should probably have userlangattributes
1613                 // added to it for LTR text on RTL pages
1614
1615                 $lang = wfGetLangObj( $lang );
1616
1617                 $attribs = [];
1618                 if ( !is_null( $tooltip ) ) {
1619                         $attribs['title'] = wfMessage( 'editsectionhint' )->rawParams( $tooltip )
1620                                 ->inLanguage( $lang )->text();
1621                 }
1622
1623                 $links = [
1624                         'editsection' => [
1625                                 'text' => wfMessage( 'editsection' )->inLanguage( $lang )->escaped(),
1626                                 'targetTitle' => $nt,
1627                                 'attribs' => $attribs,
1628                                 'query' => [ 'action' => 'edit', 'section' => $section ],
1629                                 'options' => [ 'noclasses', 'known' ]
1630                         ]
1631                 ];
1632
1633                 Hooks::run( 'SkinEditSectionLinks', [ $this, $nt, $section, $tooltip, &$links, $lang ] );
1634
1635                 $result = '<span class="mw-editsection"><span class="mw-editsection-bracket">[</span>';
1636
1637                 $linksHtml = [];
1638                 foreach ( $links as $k => $linkDetails ) {
1639                         $linksHtml[] = Linker::link(
1640                                 $linkDetails['targetTitle'],
1641                                 $linkDetails['text'],
1642                                 $linkDetails['attribs'],
1643                                 $linkDetails['query'],
1644                                 $linkDetails['options']
1645                         );
1646                 }
1647
1648                 $result .= implode(
1649                         '<span class="mw-editsection-divider">'
1650                                 . wfMessage( 'pipe-separator' )->inLanguage( $lang )->escaped()
1651                                 . '</span>',
1652                         $linksHtml
1653                 );
1654
1655                 $result .= '<span class="mw-editsection-bracket">]</span></span>';
1656                 // Deprecated, use SkinEditSectionLinks hook instead
1657                 Hooks::run(
1658                         'DoEditSectionLink',
1659                         [ $this, $nt, $section, $tooltip, &$result, $lang ],
1660                         '1.25'
1661                 );
1662                 return $result;
1663         }
1664
1665 }