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