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