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 = array();
  59                 foreach ( self::getSkinNames() as $skinKey => $skinName ) {
  60                         $messages[] = "skinname-$skinKey";
  61                 }
  62                 return $messages;
  63         }
  64
  65         /**
  66          * Fetch the list of user-selectable skins in regards to $wgSkipSkins.
  67          * Useful for Special:Preferences and other places where you
  68          * only want to show skins users _can_ use.
  69          * @return string[]
  70          * @since 1.23
  71          */
  72         public static function getAllowedSkins() {
  73                 global $wgSkipSkins;
  74
  75                 $allowedSkins = self::getSkinNames();
  76
  77                 foreach ( $wgSkipSkins as $skip ) {
  78                         unset( $allowedSkins[$skip] );
  79                 }
  80
  81                 return $allowedSkins;
  82         }
  83
  84         /**
  85          * @deprecated since 1.23, use getAllowedSkins
  86          * @return string[]
  87          */
  88         public static function getUsableSkins() {
  89                 wfDeprecated( __METHOD__, '1.23' );
  90                 return self::getAllowedSkins();
  91         }
  92
  93         /**
  94          * Normalize a skin preference value to a form that can be loaded.
  95          *
  96          * If a skin can't be found, it will fall back to the configured default ($wgDefaultSkin), or the
  97          * hardcoded default ($wgFallbackSkin) if the default skin is unavailable too.
  98          *
  99          * @param string $key 'monobook', 'vector', etc.
 100          * @return string
 101          */
 102         static function normalizeKey( $key ) {
 103                 global $wgDefaultSkin, $wgFallbackSkin;
 104
 105                 $skinNames = Skin::getSkinNames();
 106
 107                 // Make keys lowercase for case-insensitive matching.
 108                 $skinNames = array_change_key_case( $skinNames, CASE_LOWER );
 109                 $key = strtolower( $key );
 110                 $defaultSkin = strtolower( $wgDefaultSkin );
 111                 $fallbackSkin = strtolower( $wgFallbackSkin );
 112
 113                 if ( $key == '' || $key == 'default' ) {
 114                         // Don't return the default immediately;
 115                         // in a misconfiguration we need to fall back.
 116                         $key = $defaultSkin;
 117                 }
 118
 119                 if ( isset( $skinNames[$key] ) ) {
 120                         return $key;
 121                 }
 122
 123                 // Older versions of the software used a numeric setting
 124                 // in the user preferences.
 125                 $fallback = array(
 126                         0 => $defaultSkin,
 127                         2 => 'cologneblue'
 128                 );
 129
 130                 if ( isset( $fallback[$key] ) ) {
 131                         $key = $fallback[$key];
 132                 }
 133
 134                 if ( isset( $skinNames[$key] ) ) {
 135                         return $key;
 136                 } elseif ( isset( $skinNames[$defaultSkin] ) ) {
 137                         return $defaultSkin;
 138                 } else {
 139                         return $fallbackSkin;
 140                 }
 141         }
 142
 143         /**
 144          * Factory method for loading a skin of a given type
 145          * @param string $key 'monobook', 'vector', etc.
 146          * @return Skin
 147          * @deprecated since 1.24; Use SkinFactory instead
 148          */
 149         static function &newFromKey( $key ) {
 150                 wfDeprecated( __METHOD__, '1.24' );
 151
 152                 $key = Skin::normalizeKey( $key );
 153                 $factory = SkinFactory::getDefaultInstance();
 154
 155                 // normalizeKey() guarantees that a skin with this key will exist.
 156                 $skin = $factory->makeSkin( $key );
 157                 return $skin;
 158         }
 159
 160         /**
 161          * @return string Skin name
 162          */
 163         public function getSkinName() {
 164                 return $this->skinname;
 165         }
 166
 167         /**
 168          * @param OutputPage $out
 169          */
 170         function initPage( OutputPage $out ) {
 171
 172                 $this->preloadExistence();
 173
 174         }
 175
 176         /**
 177          * Defines the ResourceLoader modules that should be added to the skin
 178          * It is recommended that skins wishing to override call parent::getDefaultModules()
 179          * and substitute out any modules they wish to change by using a key to look them up
 180          * @return array Array of modules with helper keys for easy overriding
 181          */
 182         public function getDefaultModules() {
 183                 global $wgIncludeLegacyJavaScript, $wgPreloadJavaScriptMwUtil, $wgUseAjax,
 184                         $wgAjaxWatch, $wgEnableAPI, $wgEnableWriteAPI;
 185
 186                 $out = $this->getOutput();
 187                 $user = $out->getUser();
 188                 $modules = array(
 189                         // modules that enhance the page content in some way
 190                         'content' => array(
 191                                 'mediawiki.page.ready',
 192                         ),
 193                         // modules that exist for legacy reasons
 194                         'legacy' => array(),
 195                         // modules relating to search functionality
 196                         'search' => array(),
 197                         // modules relating to functionality relating to watching an article
 198                         'watch' => array(),
 199                         // modules which relate to the current users preferences
 200                         'user' => array(),
 201                 );
 202                 if ( $wgIncludeLegacyJavaScript ) {
 203                         $modules['legacy'][] = 'mediawiki.legacy.wikibits';
 204                 }
 205
 206                 if ( $wgPreloadJavaScriptMwUtil ) {
 207                         $modules['legacy'][] = 'mediawiki.util';
 208                 }
 209
 210                 // Add various resources if required
 211                 if ( $wgUseAjax ) {
 212                         $modules['legacy'][] = 'mediawiki.legacy.ajax';
 213
 214                         if ( $wgEnableAPI ) {
 215                                 if ( $wgEnableWriteAPI && $wgAjaxWatch && $user->isLoggedIn()
 216                                         && $user->isAllowed( 'writeapi' )
 217                                 ) {
 218                                         $modules['watch'][] = 'mediawiki.page.watch.ajax';
 219                                 }
 220
 221                                 $modules['search'][] = 'mediawiki.searchSuggest';
 222                         }
 223                 }
 224
 225                 if ( $user->getBoolOption( 'editsectiononrightclick' ) ) {
 226                         $modules['user'][] = 'mediawiki.action.view.rightClickEdit';
 227                 }
 228
 229                 // Crazy edit-on-double-click stuff
 230                 if ( $out->isArticle() && $user->getOption( 'editondblclick' ) ) {
 231                         $modules['user'][] = 'mediawiki.action.view.dblClickEdit';
 232                 }
 233                 return $modules;
 234         }
 235
 236         /**
 237          * Preload the existence of three commonly-requested pages in a single query
 238          */
 239         function preloadExistence() {
 240                 $titles = array();
 241
 242                 $user = $this->getUser();
 243                 $title = $this->getRelevantTitle();
 244
 245                 // User/talk link
 246                 if ( $user->isLoggedIn() || $this->showIPinHeader() ) {
 247                         $titles[] = $user->getUserPage();
 248                         $titles[] = $user->getTalkPage();
 249                 }
 250
 251                 // Other tab link
 252                 if ( $title->isSpecialPage() ) {
 253                         // nothing
 254                 } elseif ( $title->isTalkPage() ) {
 255                         $titles[] = $title->getSubjectPage();
 256                 } else {
 257                         $titles[] = $title->getTalkPage();
 258                 }
 259
 260                 Hooks::run( 'SkinPreloadExistence', array( &$titles, $this ) );
 261
 262                 if ( count( $titles ) ) {
 263                         $lb = new LinkBatch( $titles );
 264                         $lb->setCaller( __METHOD__ );
 265                         $lb->execute();
 266                 }
 267         }
 268
 269         /**
 270          * Get the current revision ID
 271          *
 272          * @return int
 273          */
 274         public function getRevisionId() {
 275                 return $this->getOutput()->getRevisionId();
 276         }
 277
 278         /**
 279          * Whether the revision displayed is the latest revision of the page
 280          *
 281          * @return bool
 282          */
 283         public function isRevisionCurrent() {
 284                 $revID = $this->getRevisionId();
 285                 return $revID == 0 || $revID == $this->getTitle()->getLatestRevID();
 286         }
 287
 288         /**
 289          * Set the "relevant" title
 290          * @see self::getRelevantTitle()
 291          * @param Title $t
 292          */
 293         public function setRelevantTitle( $t ) {
 294                 $this->mRelevantTitle = $t;
 295         }
 296
 297         /**
 298          * Return the "relevant" title.
 299          * A "relevant" title is not necessarily the actual title of the page.
 300          * Special pages like Special:MovePage use set the page they are acting on
 301          * as their "relevant" title, this allows the skin system to display things
 302          * such as content tabs which belong to to that page instead of displaying
 303          * a basic special page tab which has almost no meaning.
 304          *
 305          * @return Title
 306          */
 307         public function getRelevantTitle() {
 308                 if ( isset( $this->mRelevantTitle ) ) {
 309                         return $this->mRelevantTitle;
 310                 }
 311                 return $this->getTitle();
 312         }
 313
 314         /**
 315          * Set the "relevant" user
 316          * @see self::getRelevantUser()
 317          * @param User $u
 318          */
 319         public function setRelevantUser( $u ) {
 320                 $this->mRelevantUser = $u;
 321         }
 322
 323         /**
 324          * Return the "relevant" user.
 325          * A "relevant" user is similar to a relevant title. Special pages like
 326          * Special:Contributions mark the user which they are relevant to so that
 327          * things like the toolbox can display the information they usually are only
 328          * able to display on a user's userpage and talkpage.
 329          * @return User
 330          */
 331         public function getRelevantUser() {
 332                 if ( isset( $this->mRelevantUser ) ) {
 333                         return $this->mRelevantUser;
 334                 }
 335                 $title = $this->getRelevantTitle();
 336                 if ( $title->hasSubjectNamespace( NS_USER ) ) {
 337                         $rootUser = $title->getRootText();
 338                         if ( User::isIP( $rootUser ) ) {
 339                                 $this->mRelevantUser = User::newFromName( $rootUser, false );
 340                         } else {
 341                                 $user = User::newFromName( $rootUser, false );
 342
 343                                 if ( $user ) {
 344                                         $user->load( User::READ_NORMAL );
 345
 346                                         if ( $user->isLoggedIn() ) {
 347                                                 $this->mRelevantUser = $user;
 348                                         }
 349                                 }
 350                         }
 351                         return $this->mRelevantUser;
 352                 }
 353                 return null;
 354         }
 355
 356         /**
 357          * Outputs the HTML generated by other functions.
 358          * @param OutputPage $out
 359          */
 360         abstract function outputPage( OutputPage $out = null );
 361
 362         /**
 363          * @param array $data
 364          * @return string
 365          */
 366         static function makeVariablesScript( $data ) {
 367                 if ( $data ) {
 368                         return ResourceLoader::makeInlineScript(
 369                                 ResourceLoader::makeConfigSetScript( $data )
 370                         );
 371                 } else {
 372                         return '';
 373                 }
 374         }
 375
 376         /**
 377          * Get the query to generate a dynamic stylesheet
 378          *
 379          * @return array
 380          */
 381         public static function getDynamicStylesheetQuery() {
 382                 global $wgSquidMaxage;
 383
 384                 return array(
 385                                 'action' => 'raw',
 386                                 'maxage' => $wgSquidMaxage,
 387                                 'usemsgcache' => 'yes',
 388                                 'ctype' => 'text/css',
 389                                 'smaxage' => $wgSquidMaxage,
 390                         );
 391         }
 392
 393         /**
 394          * Add skin specific stylesheets
 395          * Calling this method with an $out of anything but the same OutputPage
 396          * inside ->getOutput() is deprecated. The $out arg is kept
 397          * for compatibility purposes with skins.
 398          * @param OutputPage $out
 399          * @todo delete
 400          */
 401         abstract function setupSkinUserCss( OutputPage $out );
 402
 403         /**
 404          * TODO: document
 405          * @param Title $title
 406          * @return string
 407          */
 408         function getPageClasses( $title ) {
 409                 $numeric = 'ns-' . $title->getNamespace();
 410
 411                 if ( $title->isSpecialPage() ) {
 412                         $type = 'ns-special';
 413                         // bug 23315: provide a class based on the canonical special page name without subpages
 414                         list( $canonicalName ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );
 415                         if ( $canonicalName ) {
 416                                 $type .= ' ' . Sanitizer::escapeClass( "mw-special-$canonicalName" );
 417                         } else {
 418                                 $type .= ' mw-invalidspecialpage';
 419                         }
 420                 } elseif ( $title->isTalkPage() ) {
 421                         $type = 'ns-talk';
 422                 } else {
 423                         $type = 'ns-subject';
 424                 }
 425
 426                 $name = Sanitizer::escapeClass( 'page-' . $title->getPrefixedText() );
 427
 428                 return "$numeric $type $name";
 429         }
 430
 431         /**
 432          * Return values for <html> element
 433          * @return array Array of associative name-to-value elements for <html> element
 434          */
 435         public function getHtmlElementAttributes() {
 436                 $lang = $this->getLanguage();
 437                 return array(
 438                         'lang' => $lang->getHtmlCode(),
 439                         'dir' => $lang->getDir(),
 440                         'class' => 'client-nojs',
 441                 );
 442         }
 443
 444         /**
 445          * This will be called by OutputPage::headElement when it is creating the
 446          * "<body>" tag, skins can override it if they have a need to add in any
 447          * body attributes or classes of their own.
 448          * @param OutputPage $out
 449          * @param array $bodyAttrs
 450          */
 451         function addToBodyAttributes( $out, &$bodyAttrs ) {
 452                 // does nothing by default
 453         }
 454
 455         /**
 456          * URL to the logo
 457          * @return string
 458          */
 459         function getLogo() {
 460                 global $wgLogo;
 461                 return $wgLogo;
 462         }
 463
 464         /**
 465          * @return string
 466          */
 467         function getCategoryLinks() {
 468                 global $wgUseCategoryBrowser;
 469
 470                 $out = $this->getOutput();
 471                 $allCats = $out->getCategoryLinks();
 472
 473                 if ( !count( $allCats ) ) {
 474                         return '';
 475                 }
 476
 477                 $embed = "<li>";
 478                 $pop = "</li>";
 479
 480                 $s = '';
 481                 $colon = $this->msg( 'colon-separator' )->escaped();
 482
 483                 if ( !empty( $allCats['normal'] ) ) {
 484                         $t = $embed . implode( "{$pop}{$embed}", $allCats['normal'] ) . $pop;
 485
 486                         $msg = $this->msg( 'pagecategories' )->numParams( count( $allCats['normal'] ) )->escaped();
 487                         $linkPage = wfMessage( 'pagecategorieslink' )->inContentLanguage()->text();
 488                         $title = Title::newFromText( $linkPage );
 489                         $link = $title ? Linker::link( $title, $msg ) : $msg;
 490                         $s .= '<div id="mw-normal-catlinks" class="mw-normal-catlinks">' .
 491                                 $link . $colon . '<ul>' . $t . '</ul>' . '</div>';
 492                 }
 493
 494                 # Hidden categories
 495                 if ( isset( $allCats['hidden'] ) ) {
 496                         if ( $this->getUser()->getBoolOption( 'showhiddencats' ) ) {
 497                                 $class = ' mw-hidden-cats-user-shown';
 498                         } elseif ( $this->getTitle()->getNamespace() == NS_CATEGORY ) {
 499                                 $class = ' mw-hidden-cats-ns-shown';
 500                         } else {
 501                                 $class = ' mw-hidden-cats-hidden';
 502                         }
 503
 504                         $s .= "<div id=\"mw-hidden-catlinks\" class=\"mw-hidden-catlinks$class\">" .
 505                                 $this->msg( 'hidden-categories' )->numParams( count( $allCats['hidden'] ) )->escaped() .
 506                                 $colon . '<ul>' . $embed . implode( "{$pop}{$embed}", $allCats['hidden'] ) . $pop . '</ul>' .
 507                                 '</div>';
 508                 }
 509
 510                 # optional 'dmoz-like' category browser. Will be shown under the list
 511                 # of categories an article belong to
 512                 if ( $wgUseCategoryBrowser ) {
 513                         $s .= '<br /><hr />';
 514
 515                         # get a big array of the parents tree
 516                         $parenttree = $this->getTitle()->getParentCategoryTree();
 517                         # Skin object passed by reference cause it can not be
 518                         # accessed under the method subfunction drawCategoryBrowser
 519                         $tempout = explode( "\n", $this->drawCategoryBrowser( $parenttree ) );
 520                         # Clean out bogus first entry and sort them
 521                         unset( $tempout[0] );
 522                         asort( $tempout );
 523                         # Output one per line
 524                         $s .= implode( "<br />\n", $tempout );
 525                 }
 526
 527                 return $s;
 528         }
 529
 530         /**
 531          * Render the array as a series of links.
 532          * @param array $tree Categories tree returned by Title::getParentCategoryTree
 533          * @return string Separated by &gt;, terminate with "\n"
 534          */
 535         function drawCategoryBrowser( $tree ) {
 536                 $return = '';
 537
 538                 foreach ( $tree as $element => $parent ) {
 539                         if ( empty( $parent ) ) {
 540                                 # element start a new list
 541                                 $return .= "\n";
 542                         } else {
 543                                 # grab the others elements
 544                                 $return .= $this->drawCategoryBrowser( $parent ) . ' &gt; ';
 545                         }
 546
 547                         # add our current element to the list
 548                         $eltitle = Title::newFromText( $element );
 549                         $return .= Linker::link( $eltitle, htmlspecialchars( $eltitle->getText() ) );
 550                 }
 551
 552                 return $return;
 553         }
 554
 555         /**
 556          * @return string
 557          */
 558         function getCategories() {
 559                 $out = $this->getOutput();
 560
 561                 $catlinks = $this->getCategoryLinks();
 562
 563                 $classes = 'catlinks';
 564
 565                 // Check what we're showing
 566                 $allCats = $out->getCategoryLinks();
 567                 $showHidden = $this->getUser()->getBoolOption( 'showhiddencats' ) ||
 568                                                 $this->getTitle()->getNamespace() == NS_CATEGORY;
 569
 570                 if ( empty( $allCats['normal'] ) && !( !empty( $allCats['hidden'] ) && $showHidden ) ) {
 571                         $classes .= ' catlinks-allhidden';
 572                 }
 573
 574                 return "<div id='catlinks' class='$classes'>{$catlinks}</div>";
 575         }
 576
 577         /**
 578          * This runs a hook to allow extensions placing their stuff after content
 579          * and article metadata (e.g. categories).
 580          * Note: This function has nothing to do with afterContent().
 581          *
 582          * This hook is placed here in order to allow using the same hook for all
 583          * skins, both the SkinTemplate based ones and the older ones, which directly
 584          * use this class to get their data.
 585          *
 586          * The output of this function gets processed in SkinTemplate::outputPage() for
 587          * the SkinTemplate based skins, all other skins should directly echo it.
 588          *
 589          * @return string Empty by default, if not changed by any hook function.
 590          */
 591         protected function afterContentHook() {
 592                 $data = '';
 593
 594                 if ( Hooks::run( 'SkinAfterContent', array( &$data, $this ) ) ) {
 595                         // adding just some spaces shouldn't toggle the output
 596                         // of the whole <div/>, so we use trim() here
 597                         if ( trim( $data ) != '' ) {
 598                                 // Doing this here instead of in the skins to
 599                                 // ensure that the div has the same ID in all
 600                                 // skins
 601                                 $data = "<div id='mw-data-after-content'>\n" .
 602                                         "\t$data\n" .
 603                                         "</div>\n";
 604                         }
 605                 } else {
 606                         wfDebug( "Hook SkinAfterContent changed output processing.\n" );
 607                 }
 608
 609                 return $data;
 610         }
 611
 612         /**
 613          * Generate debug data HTML for displaying at the bottom of the main content
 614          * area.
 615          * @return string HTML containing debug data, if enabled (otherwise empty).
 616          */
 617         protected function generateDebugHTML() {
 618                 return MWDebug::getHTMLDebugLog();
 619         }
 620
 621         /**
 622          * This gets called shortly before the "</body>" tag.
 623          *
 624          * @return string HTML-wrapped JS code to be put before "</body>"
 625          */
 626         function bottomScripts() {
 627                 // TODO and the suckage continues. This function is really just a wrapper around
 628                 // OutputPage::getBottomScripts() which takes a Skin param. This should be cleaned
 629                 // up at some point
 630                 $bottomScriptText = $this->getOutput()->getBottomScripts();
 631                 Hooks::run( 'SkinAfterBottomScripts', array( $this, &$bottomScriptText ) );
 632
 633                 return $bottomScriptText;
 634         }
 635
 636         /**
 637          * Text with the permalink to the source page,
 638          * usually shown on the footer of a printed page
 639          *
 640          * @return string HTML text with an URL
 641          */
 642         function printSource() {
 643                 $oldid = $this->getRevisionId();
 644                 if ( $oldid ) {
 645                         $canonicalUrl = $this->getTitle()->getCanonicalURL( 'oldid=' . $oldid );
 646                         $url = htmlspecialchars( wfExpandIRI( $canonicalUrl ) );
 647                 } else {
 648                         // oldid not available for non existing pages
 649                         $url = htmlspecialchars( wfExpandIRI( $this->getTitle()->getCanonicalURL() ) );
 650                 }
 651
 652                 return $this->msg( 'retrievedfrom' )
 653                         ->rawParams( '<a dir="ltr" href="' . $url. '">' . $url . '</a>' )
 654                         ->parse();
 655         }
 656
 657         /**
 658          * @return string HTML
 659          */
 660         function getUndeleteLink() {
 661                 $action = $this->getRequest()->getVal( 'action', 'view' );
 662
 663                 if ( $this->getTitle()->userCan( 'deletedhistory', $this->getUser() ) &&
 664                         ( !$this->getTitle()->exists() || $action == 'history' ) ) {
 665                         $n = $this->getTitle()->isDeleted();
 666
 667                         if ( $n ) {
 668                                 if ( $this->getTitle()->quickUserCan( 'undelete', $this->getUser() ) ) {
 669                                         $msg = 'thisisdeleted';
 670                                 } else {
 671                                         $msg = 'viewdeleted';
 672                                 }
 673
 674                                 return $this->msg( $msg )->rawParams(
 675                                         Linker::linkKnown(
 676                                                 SpecialPage::getTitleFor( 'Undelete', $this->getTitle()->getPrefixedDBkey() ),
 677                                                 $this->msg( 'restorelink' )->numParams( $n )->escaped() )
 678                                         )->escaped();
 679                         }
 680                 }
 681
 682                 return '';
 683         }
 684
 685         /**
 686          * @return string
 687          */
 688         function subPageSubtitle() {
 689                 $out = $this->getOutput();
 690                 $subpages = '';
 691
 692                 if ( !Hooks::run( 'SkinSubPageSubtitle', array( &$subpages, $this, $out ) ) ) {
 693                         return $subpages;
 694                 }
 695
 696                 if ( $out->isArticle() && MWNamespace::hasSubpages( $out->getTitle()->getNamespace() ) ) {
 697                         $ptext = $this->getTitle()->getPrefixedText();
 698                         if ( preg_match( '/\//', $ptext ) ) {
 699                                 $links = explode( '/', $ptext );
 700                                 array_pop( $links );
 701                                 $c = 0;
 702                                 $growinglink = '';
 703                                 $display = '';
 704                                 $lang = $this->getLanguage();
 705
 706                                 foreach ( $links as $link ) {
 707                                         $growinglink .= $link;
 708                                         $display .= $link;
 709                                         $linkObj = Title::newFromText( $growinglink );
 710
 711                                         if ( is_object( $linkObj ) && $linkObj->isKnown() ) {
 712                                                 $getlink = Linker::linkKnown(
 713                                                         $linkObj,
 714                                                         htmlspecialchars( $display )
 715                                                 );
 716
 717                                                 $c++;
 718
 719                                                 if ( $c > 1 ) {
 720                                                         $subpages .= $lang->getDirMarkEntity() . $this->msg( 'pipe-separator' )->escaped();
 721                                                 } else {
 722                                                         $subpages .= '&lt; ';
 723                                                 }
 724
 725                                                 $subpages .= $getlink;
 726                                                 $display = '';
 727                                         } else {
 728                                                 $display .= '/';
 729                                         }
 730                                         $growinglink .= '/';
 731                                 }
 732                         }
 733                 }
 734
 735                 return $subpages;
 736         }
 737
 738         /**
 739          * Returns true if the IP should be shown in the header
 740          * @return bool
 741          */
 742         function showIPinHeader() {
 743                 global $wgShowIPinHeader;
 744                 return $wgShowIPinHeader && session_id() != '';
 745         }
 746
 747         /**
 748          * @return string
 749          */
 750         function getSearchLink() {
 751                 $searchPage = SpecialPage::getTitleFor( 'Search' );
 752                 return $searchPage->getLocalURL();
 753         }
 754
 755         /**
 756          * @return string
 757          */
 758         function escapeSearchLink() {
 759                 return htmlspecialchars( $this->getSearchLink() );
 760         }
 761
 762         /**
 763          * @param string $type
 764          * @return string
 765          */
 766         function getCopyright( $type = 'detect' ) {
 767                 global $wgRightsPage, $wgRightsUrl, $wgRightsText;
 768
 769                 if ( $type == 'detect' ) {
 770                         if ( !$this->isRevisionCurrent()
 771                                 && !$this->msg( 'history_copyright' )->inContentLanguage()->isDisabled()
 772                         ) {
 773                                 $type = 'history';
 774                         } else {
 775                                 $type = 'normal';
 776                         }
 777                 }
 778
 779                 if ( $type == 'history' ) {
 780                         $msg = 'history_copyright';
 781                 } else {
 782                         $msg = 'copyright';
 783                 }
 784
 785                 if ( $wgRightsPage ) {
 786                         $title = Title::newFromText( $wgRightsPage );
 787                         $link = Linker::linkKnown( $title, $wgRightsText );
 788                 } elseif ( $wgRightsUrl ) {
 789                         $link = Linker::makeExternalLink( $wgRightsUrl, $wgRightsText );
 790                 } elseif ( $wgRightsText ) {
 791                         $link = $wgRightsText;
 792                 } else {
 793                         # Give up now
 794                         return '';
 795                 }
 796
 797                 // Allow for site and per-namespace customization of copyright notice.
 798                 // @todo Remove deprecated $forContent param from hook handlers and then remove here.
 799                 $forContent = true;
 800
 801                 Hooks::run(
 802                         'SkinCopyrightFooter',
 803                         array( $this->getTitle(), $type, &$msg, &$link, &$forContent )
 804                 );
 805
 806                 return $this->msg( $msg )->rawParams( $link )->text();
 807         }
 808
 809         /**
 810          * @return null|string
 811          */
 812         function getCopyrightIcon() {
 813                 global $wgRightsUrl, $wgRightsText, $wgRightsIcon, $wgCopyrightIcon;
 814
 815                 $out = '';
 816
 817                 if ( $wgCopyrightIcon ) {
 818                         $out = $wgCopyrightIcon;
 819                 } elseif ( $wgRightsIcon ) {
 820                         $icon = htmlspecialchars( $wgRightsIcon );
 821
 822                         if ( $wgRightsUrl ) {
 823                                 $url = htmlspecialchars( $wgRightsUrl );
 824                                 $out .= '<a href="' . $url . '">';
 825                         }
 826
 827                         $text = htmlspecialchars( $wgRightsText );
 828                         $out .= "<img src=\"$icon\" alt=\"$text\" width=\"88\" height=\"31\" />";
 829
 830                         if ( $wgRightsUrl ) {
 831                                 $out .= '</a>';
 832                         }
 833                 }
 834
 835                 return $out;
 836         }
 837
 838         /**
 839          * Gets the powered by MediaWiki icon.
 840          * @return string
 841          */
 842         function getPoweredBy() {
 843                 global $wgResourceBasePath;
 844
 845                 $url1 = htmlspecialchars(
 846                         "$wgResourceBasePath/resources/assets/poweredby_mediawiki_88x31.png"
 847                 );
 848                 $url1_5 = htmlspecialchars(
 849                         "$wgResourceBasePath/resources/assets/poweredby_mediawiki_132x47.png"
 850                 );
 851                 $url2 = htmlspecialchars(
 852                         "$wgResourceBasePath/resources/assets/poweredby_mediawiki_176x62.png"
 853                 );
 854                 $text = '<a href="//www.mediawiki.org/"><img src="' . $url1
 855                         . '" srcset="' . $url1_5 . ' 1.5x, ' . $url2 . ' 2x" '
 856                         . 'height="31" width="88" alt="Powered by MediaWiki" /></a>';
 857                 Hooks::run( 'SkinGetPoweredBy', array( &$text, $this ) );
 858                 return $text;
 859         }
 860
 861         /**
 862          * Get the timestamp of the latest revision, formatted in user language
 863          *
 864          * @return string
 865          */
 866         protected function lastModified() {
 867                 $timestamp = $this->getOutput()->getRevisionTimestamp();
 868
 869                 # No cached timestamp, load it from the database
 870                 if ( $timestamp === null ) {
 871                         $timestamp = Revision::getTimestampFromId( $this->getTitle(), $this->getRevisionId() );
 872                 }
 873
 874                 if ( $timestamp ) {
 875                         $d = $this->getLanguage()->userDate( $timestamp, $this->getUser() );
 876                         $t = $this->getLanguage()->userTime( $timestamp, $this->getUser() );
 877                         $s = ' ' . $this->msg( 'lastmodifiedat', $d, $t )->parse();
 878                 } else {
 879                         $s = '';
 880                 }
 881
 882                 if ( wfGetLB()->getLaggedSlaveMode() ) {
 883                         $s .= ' <strong>' . $this->msg( 'laggedslavemode' )->parse() . '</strong>';
 884                 }
 885
 886                 return $s;
 887         }
 888
 889         /**
 890          * @param string $align
 891          * @return string
 892          */
 893         function logoText( $align = '' ) {
 894                 if ( $align != '' ) {
 895                         $a = " style='float: {$align};'";
 896                 } else {
 897                         $a = '';
 898                 }
 899
 900                 $mp = $this->msg( 'mainpage' )->escaped();
 901                 $mptitle = Title::newMainPage();
 902                 $url = ( is_object( $mptitle ) ? htmlspecialchars( $mptitle->getLocalURL() ) : '' );
 903
 904                 $logourl = $this->getLogo();
 905                 $s = "<a href='{$url}'><img{$a} src='{$logourl}' alt='[{$mp}]' /></a>";
 906
 907                 return $s;
 908         }
 909
 910         /**
 911          * Renders a $wgFooterIcons icon according to the method's arguments
 912          * @param array $icon The icon to build the html for, see $wgFooterIcons
 913          *   for the format of this array.
 914          * @param bool|string $withImage Whether to use the icon's image or output
 915          *   a text-only footericon.
 916          * @return string HTML
 917          */
 918         function makeFooterIcon( $icon, $withImage = 'withImage' ) {
 919                 if ( is_string( $icon ) ) {
 920                         $html = $icon;
 921                 } else { // Assuming array
 922                         $url = isset( $icon["url"] ) ? $icon["url"] : null;
 923                         unset( $icon["url"] );
 924                         if ( isset( $icon["src"] ) && $withImage === 'withImage' ) {
 925                                 // do this the lazy way, just pass icon data as an attribute array
 926                                 $html = Html::element( 'img', $icon );
 927                         } else {
 928                                 $html = htmlspecialchars( $icon["alt"] );
 929                         }
 930                         if ( $url ) {
 931                                 $html = Html::rawElement( 'a', array( "href" => $url ), $html );
 932                         }
 933                 }
 934                 return $html;
 935         }
 936
 937         /**
 938          * Gets the link to the wiki's main page.
 939          * @return string
 940          */
 941         function mainPageLink() {
 942                 $s = Linker::linkKnown(
 943                         Title::newMainPage(),
 944                         $this->msg( 'mainpage' )->escaped()
 945                 );
 946
 947                 return $s;
 948         }
 949
 950         /**
 951          * Returns an HTML link for use in the footer
 952          * @param string $desc The i18n message key for the link text
 953          * @param string $page The i18n message key for the page to link to
 954          * @return string HTML anchor
 955          */
 956         public function footerLink( $desc, $page ) {
 957                 // if the link description has been set to "-" in the default language,
 958                 if ( $this->msg( $desc )->inContentLanguage()->isDisabled() ) {
 959                         // then it is disabled, for all languages.
 960                         return '';
 961                 } else {
 962                         // Otherwise, we display the link for the user, described in their
 963                         // language (which may or may not be the same as the default language),
 964                         // but we make the link target be the one site-wide page.
 965                         $title = Title::newFromText( $this->msg( $page )->inContentLanguage()->text() );
 966
 967                         if ( !$title ) {
 968                                 return '';
 969                         }
 970
 971                         return Linker::linkKnown(
 972                                 $title,
 973                                 $this->msg( $desc )->escaped()
 974                         );
 975                 }
 976         }
 977
 978         /**
 979          * Gets the link to the wiki's privacy policy page.
 980          * @return string HTML
 981          */
 982         function privacyLink() {
 983                 return $this->footerLink( 'privacy', 'privacypage' );
 984         }
 985
 986         /**
 987          * Gets the link to the wiki's about page.
 988          * @return string HTML
 989          */
 990         function aboutLink() {
 991                 return $this->footerLink( 'aboutsite', 'aboutpage' );
 992         }
 993
 994         /**
 995          * Gets the link to the wiki's general disclaimers page.
 996          * @return string HTML
 997          */
 998         function disclaimerLink() {
 999                 return $this->footerLink( 'disclaimers', 'disclaimerpage' );
1000         }
1001
1002         /**
1003          * Return URL options for the 'edit page' link.
1004          * This may include an 'oldid' specifier, if the current page view is such.
1005          *
1006          * @return array
1007          * @private
1008          */
1009         function editUrlOptions() {
1010                 $options = array( 'action' => 'edit' );
1011
1012                 if ( !$this->isRevisionCurrent() ) {
1013                         $options['oldid'] = intval( $this->getRevisionId() );
1014                 }
1015
1016                 return $options;
1017         }
1018
1019         /**
1020          * @param User|int $id
1021          * @return bool
1022          */
1023         function showEmailUser( $id ) {
1024                 if ( $id instanceof User ) {
1025                         $targetUser = $id;
1026                 } else {
1027                         $targetUser = User::newFromId( $id );
1028                 }
1029
1030                 # The sending user must have a confirmed email address and the target
1031                 # user must have a confirmed email address and allow emails from users.
1032                 return $this->getUser()->canSendEmail() &&
1033                         $targetUser->canReceiveEmail();
1034         }
1035
1036         /**
1037          * This function previously returned a fully resolved style path URL to images or styles stored in
1038          * the legacy skins/common/ directory.
1039          *
1040          * That directory has been removed in 1.24 and the function always returns an empty string.
1041          *
1042          * @deprecated since 1.24
1043          * @param string $name The name or path of a skin resource file
1044          * @return string Empty string
1045          */
1046         function getCommonStylePath( $name ) {
1047                 wfDeprecated( __METHOD__, '1.24' );
1048                 return '';
1049         }
1050
1051         /**
1052          * Return a fully resolved style path url to images or styles stored in the current skins's folder.
1053          * This method returns a url resolved using the configured skin style path
1054          * and includes the style version inside of the url.
1055          *
1056          * Requires $stylename to be set, otherwise throws MWException.
1057          *
1058          * @param string $name The name or path of a skin resource file
1059          * @return string The fully resolved style path url including styleversion
1060          * @throws MWException
1061          */
1062         function getSkinStylePath( $name ) {
1063                 global $wgStylePath, $wgStyleVersion;
1064
1065                 if ( $this->stylename === null ) {
1066                         $class = get_class( $this );
1067                         throw new MWException( "$class::\$stylename must be set to use getSkinStylePath()" );
1068                 }
1069
1070                 return "$wgStylePath/{$this->stylename}/$name?$wgStyleVersion";
1071         }
1072
1073         /* these are used extensively in SkinTemplate, but also some other places */
1074
1075         /**
1076          * @param string $urlaction
1077          * @return string
1078          */
1079         static function makeMainPageUrl( $urlaction = '' ) {
1080                 $title = Title::newMainPage();
1081                 self::checkTitle( $title, '' );
1082
1083                 return $title->getLocalURL( $urlaction );
1084         }
1085
1086         /**
1087          * Make a URL for a Special Page using the given query and protocol.
1088          *
1089          * If $proto is set to null, make a local URL. Otherwise, make a full
1090          * URL with the protocol specified.
1091          *
1092          * @param string $name Name of the Special page
1093          * @param string $urlaction Query to append
1094          * @param string|null $proto Protocol to use or null for a local URL
1095          * @return string
1096          */
1097         static function makeSpecialUrl( $name, $urlaction = '', $proto = null ) {
1098                 $title = SpecialPage::getSafeTitleFor( $name );
1099                 if ( is_null( $proto ) ) {
1100                         return $title->getLocalURL( $urlaction );
1101                 } else {
1102                         return $title->getFullURL( $urlaction, false, $proto );
1103                 }
1104         }
1105
1106         /**
1107          * @param string $name
1108          * @param string $subpage
1109          * @param string $urlaction
1110          * @return string
1111          */
1112         static function makeSpecialUrlSubpage( $name, $subpage, $urlaction = '' ) {
1113                 $title = SpecialPage::getSafeTitleFor( $name, $subpage );
1114                 return $title->getLocalURL( $urlaction );
1115         }
1116
1117         /**
1118          * @param string $name
1119          * @param string $urlaction
1120          * @return string
1121          */
1122         static function makeI18nUrl( $name, $urlaction = '' ) {
1123                 $title = Title::newFromText( wfMessage( $name )->inContentLanguage()->text() );
1124                 self::checkTitle( $title, $name );
1125                 return $title->getLocalURL( $urlaction );
1126         }
1127
1128         /**
1129          * @param string $name
1130          * @param string $urlaction
1131          * @return string
1132          */
1133         static function makeUrl( $name, $urlaction = '' ) {
1134                 $title = Title::newFromText( $name );
1135                 self::checkTitle( $title, $name );
1136
1137                 return $title->getLocalURL( $urlaction );
1138         }
1139
1140         /**
1141          * If url string starts with http, consider as external URL, else
1142          * internal
1143          * @param string $name
1144          * @return string URL
1145          */
1146         static function makeInternalOrExternalUrl( $name ) {
1147                 if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $name ) ) {
1148                         return $name;
1149                 } else {
1150                         return self::makeUrl( $name );
1151                 }
1152         }
1153
1154         /**
1155          * this can be passed the NS number as defined in Language.php
1156          * @param string $name
1157          * @param string $urlaction
1158          * @param int $namespace
1159          * @return string
1160          */
1161         static function makeNSUrl( $name, $urlaction = '', $namespace = NS_MAIN ) {
1162                 $title = Title::makeTitleSafe( $namespace, $name );
1163                 self::checkTitle( $title, $name );
1164
1165                 return $title->getLocalURL( $urlaction );
1166         }
1167
1168         /**
1169          * these return an array with the 'href' and boolean 'exists'
1170          * @param string $name
1171          * @param string $urlaction
1172          * @return array
1173          */
1174         static function makeUrlDetails( $name, $urlaction = '' ) {
1175                 $title = Title::newFromText( $name );
1176                 self::checkTitle( $title, $name );
1177
1178                 return array(
1179                         'href' => $title->getLocalURL( $urlaction ),
1180                         'exists' => $title->isKnown(),
1181                 );
1182         }
1183
1184         /**
1185          * Make URL details where the article exists (or at least it's convenient to think so)
1186          * @param string $name Article name
1187          * @param string $urlaction
1188          * @return array
1189          */
1190         static function makeKnownUrlDetails( $name, $urlaction = '' ) {
1191                 $title = Title::newFromText( $name );
1192                 self::checkTitle( $title, $name );
1193
1194                 return array(
1195                         'href' => $title->getLocalURL( $urlaction ),
1196                         'exists' => true
1197                 );
1198         }
1199
1200         /**
1201          * make sure we have some title to operate on
1202          *
1203          * @param Title $title
1204          * @param string $name
1205          */
1206         static function checkTitle( &$title, $name ) {
1207                 if ( !is_object( $title ) ) {
1208                         $title = Title::newFromText( $name );
1209                         if ( !is_object( $title ) ) {
1210                                 $title = Title::newFromText( '--error: link target missing--' );
1211                         }
1212                 }
1213         }
1214
1215         /**
1216          * Build an array that represents the sidebar(s), the navigation bar among them.
1217          *
1218          * BaseTemplate::getSidebar can be used to simplify the format and id generation in new skins.
1219          *
1220          * The format of the returned array is array( heading => content, ... ), where:
1221          * - heading is the heading of a navigation portlet. It is either:
1222          *   - magic string to be handled by the skins ('SEARCH' / 'LANGUAGES' / 'TOOLBOX' / ...)
1223          *   - a message name (e.g. 'navigation'), the message should be HTML-escaped by the skin
1224          *   - plain text, which should be HTML-escaped by the skin
1225          * - content is the contents of the portlet. It is either:
1226          *   - HTML text (<ul><li>...</li>...</ul>)
1227          *   - array of link data in a format accepted by BaseTemplate::makeListItem()
1228          *   - (for a magic string as a key, any value)
1229          *
1230          * Note that extensions can control the sidebar contents using the SkinBuildSidebar hook
1231          * and can technically insert anything in here; skin creators are expected to handle
1232          * values described above.
1233          *
1234          * @return array
1235          */
1236         function buildSidebar() {
1237                 global $wgMemc, $wgEnableSidebarCache, $wgSidebarCacheExpiry;
1238
1239                 $key = wfMemcKey( 'sidebar', $this->getLanguage()->getCode() );
1240
1241                 if ( $wgEnableSidebarCache ) {
1242                         $cachedsidebar = $wgMemc->get( $key );
1243                         if ( $cachedsidebar ) {
1244                                 Hooks::run( 'SidebarBeforeOutput', array( $this, &$cachedsidebar ) );
1245
1246                                 return $cachedsidebar;
1247                         }
1248                 }
1249
1250                 $bar = array();
1251                 $this->addToSidebar( $bar, 'sidebar' );
1252
1253                 Hooks::run( 'SkinBuildSidebar', array( $this, &$bar ) );
1254                 if ( $wgEnableSidebarCache ) {
1255                         $wgMemc->set( $key, $bar, $wgSidebarCacheExpiry );
1256                 }
1257
1258                 Hooks::run( 'SidebarBeforeOutput', array( $this, &$bar ) );
1259
1260                 return $bar;
1261         }
1262
1263         /**
1264          * Add content from a sidebar system message
1265          * Currently only used for MediaWiki:Sidebar (but may be used by Extensions)
1266          *
1267          * This is just a wrapper around addToSidebarPlain() for backwards compatibility
1268          *
1269          * @param array $bar
1270          * @param string $message
1271          */
1272         function addToSidebar( &$bar, $message ) {
1273                 $this->addToSidebarPlain( $bar, wfMessage( $message )->inContentLanguage()->plain() );
1274         }
1275
1276         /**
1277          * Add content from plain text
1278          * @since 1.17
1279          * @param array $bar
1280          * @param string $text
1281          * @return array
1282          */
1283         function addToSidebarPlain( &$bar, $text ) {
1284                 $lines = explode( "\n", $text );
1285
1286                 $heading = '';
1287
1288                 foreach ( $lines as $line ) {
1289                         if ( strpos( $line, '*' ) !== 0 ) {
1290                                 continue;
1291                         }
1292                         $line = rtrim( $line, "\r" ); // for Windows compat
1293
1294                         if ( strpos( $line, '**' ) !== 0 ) {
1295                                 $heading = trim( $line, '* ' );
1296                                 if ( !array_key_exists( $heading, $bar ) ) {
1297                                         $bar[$heading] = array();
1298                                 }
1299                         } else {
1300                                 $line = trim( $line, '* ' );
1301
1302                                 if ( strpos( $line, '|' ) !== false ) { // sanity check
1303                                         $line = MessageCache::singleton()->transform( $line, false, null, $this->getTitle() );
1304                                         $line = array_map( 'trim', explode( '|', $line, 2 ) );
1305                                         if ( count( $line ) !== 2 ) {
1306                                                 // Second sanity check, could be hit by people doing
1307                                                 // funky stuff with parserfuncs... (bug 33321)
1308                                                 continue;
1309                                         }
1310
1311                                         $extraAttribs = array();
1312
1313                                         $msgLink = $this->msg( $line[0] )->inContentLanguage();
1314                                         if ( $msgLink->exists() ) {
1315                                                 $link = $msgLink->text();
1316                                                 if ( $link == '-' ) {
1317                                                         continue;
1318                                                 }
1319                                         } else {
1320                                                 $link = $line[0];
1321                                         }
1322                                         $msgText = $this->msg( $line[1] );
1323                                         if ( $msgText->exists() ) {
1324                                                 $text = $msgText->text();
1325                                         } else {
1326                                                 $text = $line[1];
1327                                         }
1328
1329                                         if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $link ) ) {
1330                                                 $href = $link;
1331
1332                                                 // Parser::getExternalLinkAttribs won't work here because of the Namespace things
1333                                                 global $wgNoFollowLinks, $wgNoFollowDomainExceptions;
1334                                                 if ( $wgNoFollowLinks && !wfMatchesDomainList( $href, $wgNoFollowDomainExceptions ) ) {
1335                                                         $extraAttribs['rel'] = 'nofollow';
1336                                                 }
1337
1338                                                 global $wgExternalLinkTarget;
1339                                                 if ( $wgExternalLinkTarget ) {
1340                                                         $extraAttribs['target'] = $wgExternalLinkTarget;
1341                                                 }
1342                                         } else {
1343                                                 $title = Title::newFromText( $link );
1344
1345                                                 if ( $title ) {
1346                                                         $title = $title->fixSpecialName();
1347                                                         $href = $title->getLinkURL();
1348                                                 } else {
1349                                                         $href = 'INVALID-TITLE';
1350                                                 }
1351                                         }
1352
1353                                         $bar[$heading][] = array_merge( array(
1354                                                 'text' => $text,
1355                                                 'href' => $href,
1356                                                 'id' => 'n-' . Sanitizer::escapeId( strtr( $line[1], ' ', '-' ), 'noninitial' ),
1357                                                 'active' => false
1358                                         ), $extraAttribs );
1359                                 } else {
1360                                         continue;
1361                                 }
1362                         }
1363                 }
1364
1365                 return $bar;
1366         }
1367
1368         /**
1369          * This function previously controlled whether the 'mediawiki.legacy.wikiprintable' module
1370          * should be loaded by OutputPage. That module no longer exists and the return value of this
1371          * method is ignored.
1372          *
1373          * If your skin doesn't provide its own print styles, the 'mediawiki.legacy.commonPrint' module
1374          * can be used instead (SkinTemplate-based skins do it automatically).
1375          *
1376          * @deprecated since 1.22
1377          * @return bool
1378          */
1379         public function commonPrintStylesheet() {
1380                 wfDeprecated( __METHOD__, '1.22' );
1381                 return false;
1382         }
1383
1384         /**
1385          * Gets new talk page messages for the current user and returns an
1386          * appropriate alert message (or an empty string if there are no messages)
1387          * @return string
1388          */
1389         function getNewtalks() {
1390
1391                 $newMessagesAlert = '';
1392                 $user = $this->getUser();
1393                 $newtalks = $user->getNewMessageLinks();
1394                 $out = $this->getOutput();
1395
1396                 // Allow extensions to disable or modify the new messages alert
1397                 if ( !Hooks::run( 'GetNewMessagesAlert', array( &$newMessagesAlert, $newtalks, $user, $out ) ) ) {
1398                         return '';
1399                 }
1400                 if ( $newMessagesAlert ) {
1401                         return $newMessagesAlert;
1402                 }
1403
1404                 if ( count( $newtalks ) == 1 && $newtalks[0]['wiki'] === wfWikiID() ) {
1405                         $uTalkTitle = $user->getTalkPage();
1406                         $lastSeenRev = isset( $newtalks[0]['rev'] ) ? $newtalks[0]['rev'] : null;
1407                         $nofAuthors = 0;
1408                         if ( $lastSeenRev !== null ) {
1409                                 $plural = true; // Default if we have a last seen revision: if unknown, use plural
1410                                 $latestRev = Revision::newFromTitle( $uTalkTitle, false, Revision::READ_NORMAL );
1411                                 if ( $latestRev !== null ) {
1412                                         // Singular if only 1 unseen revision, plural if several unseen revisions.
1413                                         $plural = $latestRev->getParentId() !== $lastSeenRev->getId();
1414                                         $nofAuthors = $uTalkTitle->countAuthorsBetween(
1415                                                 $lastSeenRev, $latestRev, 10, 'include_new' );
1416                                 }
1417                         } else {
1418                                 // Singular if no revision -> diff link will show latest change only in any case
1419                                 $plural = false;
1420                         }
1421                         $plural = $plural ? 999 : 1;
1422                         // 999 signifies "more than one revision". We don't know how many, and even if we did,
1423                         // the number of revisions or authors is not necessarily the same as the number of
1424                         // "messages".
1425                         $newMessagesLink = Linker::linkKnown(
1426                                 $uTalkTitle,
1427                                 $this->msg( 'newmessageslinkplural' )->params( $plural )->escaped(),
1428                                 array(),
1429                                 array( 'redirect' => 'no' )
1430                         );
1431
1432                         $newMessagesDiffLink = Linker::linkKnown(
1433                                 $uTalkTitle,
1434                                 $this->msg( 'newmessagesdifflinkplural' )->params( $plural )->escaped(),
1435                                 array(),
1436                                 $lastSeenRev !== null
1437                                         ? array( 'oldid' => $lastSeenRev->getId(), 'diff' => 'cur' )
1438                                         : array( 'diff' => 'cur' )
1439                         );
1440
1441                         if ( $nofAuthors >= 1 && $nofAuthors <= 10 ) {
1442                                 $newMessagesAlert = $this->msg(
1443                                         'youhavenewmessagesfromusers',
1444                                         $newMessagesLink,
1445                                         $newMessagesDiffLink
1446                                 )->numParams( $nofAuthors, $plural );
1447                         } else {
1448                                 // $nofAuthors === 11 signifies "11 or more" ("more than 10")
1449                                 $newMessagesAlert = $this->msg(
1450                                         $nofAuthors > 10 ? 'youhavenewmessagesmanyusers' : 'youhavenewmessages',
1451                                         $newMessagesLink,
1452                                         $newMessagesDiffLink
1453                                 )->numParams( $plural );
1454                         }
1455                         $newMessagesAlert = $newMessagesAlert->text();
1456                         # Disable Squid cache
1457                         $out->setSquidMaxage( 0 );
1458                 } elseif ( count( $newtalks ) ) {
1459                         $sep = $this->msg( 'newtalkseparator' )->escaped();
1460                         $msgs = array();
1461
1462                         foreach ( $newtalks as $newtalk ) {
1463                                 $msgs[] = Xml::element(
1464                                         'a',
1465                                         array( 'href' => $newtalk['link'] ), $newtalk['wiki']
1466                                 );
1467                         }
1468                         $parts = implode( $sep, $msgs );
1469                         $newMessagesAlert = $this->msg( 'youhavenewmessagesmulti' )->rawParams( $parts )->escaped();
1470                         $out->setSquidMaxage( 0 );
1471                 }
1472
1473                 return $newMessagesAlert;
1474         }
1475
1476         /**
1477          * Get a cached notice
1478          *
1479          * @param string $name Message name, or 'default' for $wgSiteNotice
1480          * @return string|bool HTML fragment, or false to indicate that the caller
1481          *   should fall back to the next notice in its sequence
1482          */
1483         private function getCachedNotice( $name ) {
1484                 global $wgRenderHashAppend, $parserMemc, $wgContLang;
1485
1486                 $needParse = false;
1487
1488                 if ( $name === 'default' ) {
1489                         // special case
1490                         global $wgSiteNotice;
1491                         $notice = $wgSiteNotice;
1492                         if ( empty( $notice ) ) {
1493                                 return false;
1494                         }
1495                 } else {
1496                         $msg = $this->msg( $name )->inContentLanguage();
1497                         if ( $msg->isBlank() ) {
1498                                 return '';
1499                         } elseif ( $msg->isDisabled() ) {
1500                                 return false;
1501                         }
1502                         $notice = $msg->plain();
1503                 }
1504
1505                 // Use the extra hash appender to let eg SSL variants separately cache.
1506                 $key = wfMemcKey( $name . $wgRenderHashAppend );
1507                 $cachedNotice = $parserMemc->get( $key );
1508                 if ( is_array( $cachedNotice ) ) {
1509                         if ( md5( $notice ) == $cachedNotice['hash'] ) {
1510                                 $notice = $cachedNotice['html'];
1511                         } else {
1512                                 $needParse = true;
1513                         }
1514                 } else {
1515                         $needParse = true;
1516                 }
1517
1518                 if ( $needParse ) {
1519                         $parsed = $this->getOutput()->parse( $notice );
1520                         $parserMemc->set( $key, array( 'html' => $parsed, 'hash' => md5( $notice ) ), 600 );
1521                         $notice = $parsed;
1522                 }
1523
1524                 $notice = Html::rawElement( 'div', array( 'id' => 'localNotice',
1525                         'lang' => $wgContLang->getHtmlCode(), 'dir' => $wgContLang->getDir() ), $notice );
1526                 return $notice;
1527         }
1528
1529         /**
1530          * Get a notice based on page's namespace
1531          *
1532          * @return string HTML fragment
1533          */
1534         function getNamespaceNotice() {
1535
1536                 $key = 'namespacenotice-' . $this->getTitle()->getNsText();
1537                 $namespaceNotice = $this->getCachedNotice( $key );
1538                 if ( $namespaceNotice && substr( $namespaceNotice, 0, 7 ) != '<p>&lt;' ) {
1539                         $namespaceNotice = '<div id="namespacebanner">' . $namespaceNotice . '</div>';
1540                 } else {
1541                         $namespaceNotice = '';
1542                 }
1543
1544                 return $namespaceNotice;
1545         }
1546
1547         /**
1548          * Get the site notice
1549          *
1550          * @return string HTML fragment
1551          */
1552         function getSiteNotice() {
1553                 $siteNotice = '';
1554
1555                 if ( Hooks::run( 'SiteNoticeBefore', array( &$siteNotice, $this ) ) ) {
1556                         if ( is_object( $this->getUser() ) && $this->getUser()->isLoggedIn() ) {
1557                                 $siteNotice = $this->getCachedNotice( 'sitenotice' );
1558                         } else {
1559                                 $anonNotice = $this->getCachedNotice( 'anonnotice' );
1560                                 if ( $anonNotice === false ) {
1561                                         $siteNotice = $this->getCachedNotice( 'sitenotice' );
1562                                 } else {
1563                                         $siteNotice = $anonNotice;
1564                                 }
1565                         }
1566                         if ( $siteNotice === false ) {
1567                                 $siteNotice = $this->getCachedNotice( 'default' );
1568                         }
1569                 }
1570
1571                 Hooks::run( 'SiteNoticeAfter', array( &$siteNotice, $this ) );
1572                 return $siteNotice;
1573         }
1574
1575         /**
1576          * Create a section edit link.  This supersedes editSectionLink() and
1577          * editSectionLinkForOther().
1578          *
1579          * @param Title $nt The title being linked to (may not be the same as
1580          *   the current page, if the section is included from a template)
1581          * @param string $section The designation of the section being pointed to,
1582          *   to be included in the link, like "&section=$section"
1583          * @param string $tooltip The tooltip to use for the link: will be escaped
1584          *   and wrapped in the 'editsectionhint' message
1585          * @param string $lang Language code
1586          * @return string HTML to use for edit link
1587          */
1588         public function doEditSectionLink( Title $nt, $section, $tooltip = null, $lang = false ) {
1589                 // HTML generated here should probably have userlangattributes
1590                 // added to it for LTR text on RTL pages
1591
1592                 $lang = wfGetLangObj( $lang );
1593
1594                 $attribs = array();
1595                 if ( !is_null( $tooltip ) ) {
1596                         # Bug 25462: undo double-escaping.
1597                         $tooltip = Sanitizer::decodeCharReferences( $tooltip );
1598                         $attribs['title'] = wfMessage( 'editsectionhint' )->rawParams( $tooltip )
1599                                 ->inLanguage( $lang )->text();
1600                 }
1601
1602                 $links = array(
1603                         'editsection' => array(
1604                                 'text' => wfMessage( 'editsection' )->inLanguage( $lang )->escaped(),
1605                                 'targetTitle' => $nt,
1606                                 'attribs' => $attribs,
1607                                 'query' => array( 'action' => 'edit', 'section' => $section ),
1608                                 'options' => array( 'noclasses', 'known' )
1609                         )
1610                 );
1611
1612                 Hooks::run( 'SkinEditSectionLinks', array( $this, $nt, $section, $tooltip, &$links, $lang ) );
1613
1614                 $result = '<span class="mw-editsection"><span class="mw-editsection-bracket">[</span>';
1615
1616                 $linksHtml = array();
1617                 foreach ( $links as $k => $linkDetails ) {
1618                         $linksHtml[] = Linker::link(
1619                                 $linkDetails['targetTitle'],
1620                                 $linkDetails['text'],
1621                                 $linkDetails['attribs'],
1622                                 $linkDetails['query'],
1623                                 $linkDetails['options']
1624                         );
1625                 }
1626
1627                 $result .= implode(
1628                         '<span class="mw-editsection-divider">'
1629                                 . wfMessage( 'pipe-separator' )->inLanguage( $lang )->text()
1630                                 . '</span>',
1631                         $linksHtml
1632                 );
1633
1634                 $result .= '<span class="mw-editsection-bracket">]</span></span>';
1635                 // Deprecated, use SkinEditSectionLinks hook instead
1636                 Hooks::run(
1637                         'DoEditSectionLink',
1638                         array( $this, $nt, $section, $tooltip, &$result, $lang ),
1639                         '1.25'
1640                 );
1641                 return $result;
1642         }
1643
1644         /**
1645          * Use PHP's magic __call handler to intercept legacy calls to the linker
1646          * for backwards compatibility.
1647          *
1648          * @param string $fname Name of called method
1649          * @param array $args Arguments to the method
1650          * @throws MWException
1651          * @return mixed
1652          */
1653         function __call( $fname, $args ) {
1654                 $realFunction = array( 'Linker', $fname );
1655                 if ( is_callable( $realFunction ) ) {
1656                         wfDeprecated( get_class( $this ) . '::' . $fname, '1.21' );
1657                         return call_user_func_array( $realFunction, $args );
1658                 } else {
1659                         $className = get_class( $this );
1660                         throw new MWException( "Call to undefined method $className::$fname" );
1661                 }
1662         }
1663
1664 }