includes/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  * This base class is also the "Standard" skin.
  30  *
  31  * See docs/skin.txt for more information.
  32  *
  33  * @ingroup Skins
  34  */
  35 abstract class Skin extends ContextSource {
  36         protected $skinname = 'standard';
  37         protected $mRelevantTitle = null;
  38         protected $mRelevantUser = null;
  39
  40         /**
  41          * Fetch the set of available skins.
  42          * @return array associative array of strings
  43          */
  44         static function getSkinNames() {
  45                 global $wgValidSkinNames;
  46                 static $skinsInitialised = false;
  47
  48                 if ( !$skinsInitialised || !count( $wgValidSkinNames ) ) {
  49                         # Get a list of available skins
  50                         # Build using the regular expression '^(.*).php$'
  51                         # Array keys are all lower case, array value keep the case used by filename
  52                         #
  53                         wfProfileIn( __METHOD__ . '-init' );
  54
  55                         global $wgStyleDirectory;
  56
  57                         $skinDir = dir( $wgStyleDirectory );
  58
  59                         if ( $skinDir !== false && $skinDir !== null ) {
  60                                 # while code from www.php.net
  61                                 while ( false !== ( $file = $skinDir->read() ) ) {
  62                                         // Skip non-PHP files, hidden files, and '.dep' includes
  63                                         $matches = array();
  64
  65                                         if ( preg_match( '/^([^.]*)\.php$/', $file, $matches ) ) {
  66                                                 $aSkin = $matches[1];
  67                                                 $wgValidSkinNames[strtolower( $aSkin )] = $aSkin;
  68                                         }
  69                                 }
  70                                 $skinDir->close();
  71                         }
  72                         $skinsInitialised = true;
  73                         wfProfileOut( __METHOD__ . '-init' );
  74                 }
  75                 return $wgValidSkinNames;
  76         }
  77
  78         /**
  79          * Fetch the skinname messages for available skins.
  80          * @return array of strings
  81          */
  82         static function getSkinNameMessages() {
  83                 $messages = array();
  84                 foreach ( self::getSkinNames() as $skinKey => $skinName ) {
  85                         $messages[] = "skinname-$skinKey";
  86                 }
  87                 return $messages;
  88         }
  89
  90         /**
  91          * Fetch the list of user-selectable skins in regards to $wgSkipSkins.
  92          * Useful for Special:Preferences and other places where you
  93          * only want to show skins users _can_ use.
  94          * @return array of strings
  95          */
  96         public static function getUsableSkins() {
  97                 global $wgSkipSkins;
  98
  99                 $allowedSkins = self::getSkinNames();
 100
 101                 foreach ( $wgSkipSkins as $skip ) {
 102                         unset( $allowedSkins[$skip] );
 103                 }
 104
 105                 return $allowedSkins;
 106         }
 107
 108         /**
 109          * Normalize a skin preference value to a form that can be loaded.
 110          * If a skin can't be found, it will fall back to the configured
 111          * default (or the old 'Classic' skin if that's broken).
 112          * @param string $key 'monobook', 'standard', etc.
 113          * @return string
 114          */
 115         static function normalizeKey( $key ) {
 116                 global $wgDefaultSkin;
 117
 118                 $skinNames = Skin::getSkinNames();
 119
 120                 if ( $key == '' || $key == 'default' ) {
 121                         // Don't return the default immediately;
 122                         // in a misconfiguration we need to fall back.
 123                         $key = $wgDefaultSkin;
 124                 }
 125
 126                 if ( isset( $skinNames[$key] ) ) {
 127                         return $key;
 128                 }
 129
 130                 // Older versions of the software used a numeric setting
 131                 // in the user preferences.
 132                 $fallback = array(
 133                         0 => $wgDefaultSkin,
 134                         2 => 'cologneblue'
 135                 );
 136
 137                 if ( isset( $fallback[$key] ) ) {
 138                         $key = $fallback[$key];
 139                 }
 140
 141                 if ( isset( $skinNames[$key] ) ) {
 142                         return $key;
 143                 } elseif ( isset( $skinNames[$wgDefaultSkin] ) ) {
 144                         return $wgDefaultSkin;
 145                 } else {
 146                         return 'vector';
 147                 }
 148         }
 149
 150         /**
 151          * Factory method for loading a skin of a given type
 152          * @param string $key 'monobook', 'standard', etc.
 153          * @return Skin
 154          */
 155         static function &newFromKey( $key ) {
 156                 global $wgStyleDirectory;
 157
 158                 $key = Skin::normalizeKey( $key );
 159
 160                 $skinNames = Skin::getSkinNames();
 161                 $skinName = $skinNames[$key];
 162                 $className = "Skin{$skinName}";
 163
 164                 # Grab the skin class and initialise it.
 165                 if ( !class_exists( $className ) ) {
 166
 167                         require_once "{$wgStyleDirectory}/{$skinName}.php";
 168
 169                         # Check if we got if not fallback to default skin
 170                         if ( !class_exists( $className ) ) {
 171                                 # DO NOT die if the class isn't found. This breaks maintenance
 172                                 # scripts and can cause a user account to be unrecoverable
 173                                 # except by SQL manipulation if a previously valid skin name
 174                                 # is no longer valid.
 175                                 wfDebug( "Skin class does not exist: $className\n" );
 176                                 $className = 'SkinVector';
 177                                 require_once "{$wgStyleDirectory}/Vector.php";
 178                         }
 179                 }
 180                 $skin = new $className( $key );
 181                 return $skin;
 182         }
 183
 184         /** @return string skin name */
 185         public function getSkinName() {
 186                 return $this->skinname;
 187         }
 188
 189         /**
 190          * @param $out OutputPage
 191          */
 192         function initPage( OutputPage $out ) {
 193                 wfProfileIn( __METHOD__ );
 194
 195                 $this->preloadExistence();
 196
 197                 wfProfileOut( __METHOD__ );
 198         }
 199
 200         /**
 201          * Defines the ResourceLoader modules that should be added to the skin
 202          * It is recommended that skins wishing to override call parent::getDefaultModules()
 203          * and substitute out any modules they wish to change by using a key to look them up
 204          * @return Array of modules with helper keys for easy overriding
 205          */
 206         public function getDefaultModules() {
 207                 global $wgIncludeLegacyJavaScript, $wgPreloadJavaScriptMwUtil, $wgUseAjax,
 208                         $wgAjaxWatch, $wgEnableAPI, $wgEnableWriteAPI;
 209
 210                 $out = $this->getOutput();
 211                 $user = $out->getUser();
 212                 $modules = array(
 213                         // modules that enhance the page content in some way
 214                         'content' => array(
 215                                 'mediawiki.page.ready',
 216                         ),
 217                         // modules that exist for legacy reasons
 218                         'legacy' => array(),
 219                         // modules relating to search functionality
 220                         'search' => array(),
 221                         // modules relating to functionality relating to watching an article
 222                         'watch' => array(),
 223                         // modules which relate to the current users preferences
 224                         'user' => array(),
 225                 );
 226                 if ( $wgIncludeLegacyJavaScript ) {
 227                         $modules['legacy'][] = 'mediawiki.legacy.wikibits';
 228                 }
 229
 230                 if ( $wgPreloadJavaScriptMwUtil ) {
 231                         $modules['legacy'][] = 'mediawiki.util';
 232                 }
 233
 234                 // Add various resources if required
 235                 if ( $wgUseAjax ) {
 236                         $modules['legacy'][] = 'mediawiki.legacy.ajax';
 237
 238                         if ( $wgEnableAPI ) {
 239                                 if ( $wgEnableWriteAPI && $wgAjaxWatch && $user->isLoggedIn()
 240                                         && $user->isAllowed( 'writeapi' )
 241                                 ) {
 242                                         $modules['watch'][] = 'mediawiki.page.watch.ajax';
 243                                 }
 244
 245                                 if ( !$user->getOption( 'disablesuggest', false ) ) {
 246                                         $modules['search'][] = 'mediawiki.searchSuggest';
 247                                 }
 248                         }
 249                 }
 250
 251                 if ( $user->getBoolOption( 'editsectiononrightclick' ) ) {
 252                         $modules['user'][] = 'mediawiki.action.view.rightClickEdit';
 253                 }
 254
 255                 // Crazy edit-on-double-click stuff
 256                 if ( $out->isArticle() && $user->getOption( 'editondblclick' ) ) {
 257                         $modules['user'][] = 'mediawiki.action.view.dblClickEdit';
 258                 }
 259                 return $modules;
 260         }
 261
 262         /**
 263          * Preload the existence of three commonly-requested pages in a single query
 264          */
 265         function preloadExistence() {
 266                 $user = $this->getUser();
 267
 268                 // User/talk link
 269                 $titles = array( $user->getUserPage(), $user->getTalkPage() );
 270
 271                 // Other tab link
 272                 if ( $this->getTitle()->isSpecialPage() ) {
 273                         // nothing
 274                 } elseif ( $this->getTitle()->isTalkPage() ) {
 275                         $titles[] = $this->getTitle()->getSubjectPage();
 276                 } else {
 277                         $titles[] = $this->getTitle()->getTalkPage();
 278                 }
 279
 280                 $lb = new LinkBatch( $titles );
 281                 $lb->setCaller( __METHOD__ );
 282                 $lb->execute();
 283         }
 284
 285         /**
 286          * Get the current revision ID
 287          *
 288          * @return Integer
 289          */
 290         public function getRevisionId() {
 291                 return $this->getOutput()->getRevisionId();
 292         }
 293
 294         /**
 295          * Whether the revision displayed is the latest revision of the page
 296          *
 297          * @return Boolean
 298          */
 299         public function isRevisionCurrent() {
 300                 $revID = $this->getRevisionId();
 301                 return $revID == 0 || $revID == $this->getTitle()->getLatestRevID();
 302         }
 303
 304         /**
 305          * Set the "relevant" title
 306          * @see self::getRelevantTitle()
 307          * @param $t Title object to use
 308          */
 309         public function setRelevantTitle( $t ) {
 310                 $this->mRelevantTitle = $t;
 311         }
 312
 313         /**
 314          * Return the "relevant" title.
 315          * A "relevant" title is not necessarily the actual title of the page.
 316          * Special pages like Special:MovePage use set the page they are acting on
 317          * as their "relevant" title, this allows the skin system to display things
 318          * such as content tabs which belong to to that page instead of displaying
 319          * a basic special page tab which has almost no meaning.
 320          *
 321          * @return Title
 322          */
 323         public function getRelevantTitle() {
 324                 if ( isset( $this->mRelevantTitle ) ) {
 325                         return $this->mRelevantTitle;
 326                 }
 327                 return $this->getTitle();
 328         }
 329
 330         /**
 331          * Set the "relevant" user
 332          * @see self::getRelevantUser()
 333          * @param $u User object to use
 334          */
 335         public function setRelevantUser( $u ) {
 336                 $this->mRelevantUser = $u;
 337         }
 338
 339         /**
 340          * Return the "relevant" user.
 341          * A "relevant" user is similar to a relevant title. Special pages like
 342          * Special:Contributions mark the user which they are relevant to so that
 343          * things like the toolbox can display the information they usually are only
 344          * able to display on a user's userpage and talkpage.
 345          * @return User
 346          */
 347         public function getRelevantUser() {
 348                 if ( isset( $this->mRelevantUser ) ) {
 349                         return $this->mRelevantUser;
 350                 }
 351                 $title = $this->getRelevantTitle();
 352                 if ( $title->hasSubjectNamespace( NS_USER ) ) {
 353                         $rootUser = $title->getRootText();
 354                         if ( User::isIP( $rootUser ) ) {
 355                                 $this->mRelevantUser = User::newFromName( $rootUser, false );
 356                         } else {
 357                                 $user = User::newFromName( $rootUser, false );
 358                                 if ( $user && $user->isLoggedIn() ) {
 359                                         $this->mRelevantUser = $user;
 360                                 }
 361                         }
 362                         return $this->mRelevantUser;
 363                 }
 364                 return null;
 365         }
 366
 367         /**
 368          * Outputs the HTML generated by other functions.
 369          * @param $out OutputPage
 370          */
 371         abstract function outputPage( OutputPage $out = null );
 372
 373         /**
 374          * @param $data array
 375          * @return string
 376          */
 377         static function makeVariablesScript( $data ) {
 378                 if ( $data ) {
 379                         return Html::inlineScript(
 380                                 ResourceLoader::makeLoaderConditionalScript( ResourceLoader::makeConfigSetScript( $data ) )
 381                         );
 382                 } else {
 383                         return '';
 384                 }
 385         }
 386
 387         /**
 388          * Make a "<script>" tag containing global variables
 389          *
 390          * @deprecated in 1.19
 391          * @param $unused
 392          * @return string HTML fragment
 393          */
 394         public static function makeGlobalVariablesScript( $unused ) {
 395                 global $wgOut;
 396
 397                 wfDeprecated( __METHOD__, '1.19' );
 398
 399                 return self::makeVariablesScript( $wgOut->getJSVars() );
 400         }
 401
 402         /**
 403          * Get the query to generate a dynamic stylesheet
 404          *
 405          * @return array
 406          */
 407         public static function getDynamicStylesheetQuery() {
 408                 global $wgSquidMaxage;
 409
 410                 return array(
 411                                 'action' => 'raw',
 412                                 'maxage' => $wgSquidMaxage,
 413                                 'usemsgcache' => 'yes',
 414                                 'ctype' => 'text/css',
 415                                 'smaxage' => $wgSquidMaxage,
 416                         );
 417         }
 418
 419         /**
 420          * Add skin specific stylesheets
 421          * Calling this method with an $out of anything but the same OutputPage
 422          * inside ->getOutput() is deprecated. The $out arg is kept
 423          * for compatibility purposes with skins.
 424          * @param $out OutputPage
 425          * @todo delete
 426          */
 427         abstract function setupSkinUserCss( OutputPage $out );
 428
 429         /**
 430          * TODO: document
 431          * @param $title Title
 432          * @return String
 433          */
 434         function getPageClasses( $title ) {
 435                 $numeric = 'ns-' . $title->getNamespace();
 436
 437                 if ( $title->isSpecialPage() ) {
 438                         $type = 'ns-special';
 439                         // bug 23315: provide a class based on the canonical special page name without subpages
 440                         list( $canonicalName ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );
 441                         if ( $canonicalName ) {
 442                                 $type .= ' ' . Sanitizer::escapeClass( "mw-special-$canonicalName" );
 443                         } else {
 444                                 $type .= ' mw-invalidspecialpage';
 445                         }
 446                 } elseif ( $title->isTalkPage() ) {
 447                         $type = 'ns-talk';
 448                 } else {
 449                         $type = 'ns-subject';
 450                 }
 451
 452                 $name = Sanitizer::escapeClass( 'page-' . $title->getPrefixedText() );
 453
 454                 return "$numeric $type $name";
 455         }
 456
 457         /**
 458          * This will be called by OutputPage::headElement when it is creating the
 459          * "<body>" tag, skins can override it if they have a need to add in any
 460          * body attributes or classes of their own.
 461          * @param $out OutputPage
 462          * @param $bodyAttrs Array
 463          */
 464         function addToBodyAttributes( $out, &$bodyAttrs ) {
 465                 // does nothing by default
 466         }
 467
 468         /**
 469          * URL to the logo
 470          * @return String
 471          */
 472         function getLogo() {
 473                 global $wgLogo;
 474                 return $wgLogo;
 475         }
 476
 477         /**
 478          * @return string
 479          */
 480         function getCategoryLinks() {
 481                 global $wgUseCategoryBrowser;
 482
 483                 $out = $this->getOutput();
 484                 $allCats = $out->getCategoryLinks();
 485
 486                 if ( !count( $allCats ) ) {
 487                         return '';
 488                 }
 489
 490                 $embed = "<li>";
 491                 $pop = "</li>";
 492
 493                 $s = '';
 494                 $colon = $this->msg( 'colon-separator' )->escaped();
 495
 496                 if ( !empty( $allCats['normal'] ) ) {
 497                         $t = $embed . implode( "{$pop}{$embed}", $allCats['normal'] ) . $pop;
 498
 499                         $msg = $this->msg( 'pagecategories' )->numParams( count( $allCats['normal'] ) )->escaped();
 500                         $linkPage = wfMessage( 'pagecategorieslink' )->inContentLanguage()->text();
 501                         $s .= '<div id="mw-normal-catlinks" class="mw-normal-catlinks">' .
 502                                 Linker::link( Title::newFromText( $linkPage ), $msg )
 503                                 . $colon . '<ul>' . $t . '</ul>' . '</div>';
 504                 }
 505
 506                 # Hidden categories
 507                 if ( isset( $allCats['hidden'] ) ) {
 508                         if ( $this->getUser()->getBoolOption( 'showhiddencats' ) ) {
 509                                 $class = ' mw-hidden-cats-user-shown';
 510                         } elseif ( $this->getTitle()->getNamespace() == NS_CATEGORY ) {
 511                                 $class = ' mw-hidden-cats-ns-shown';
 512                         } else {
 513                                 $class = ' mw-hidden-cats-hidden';
 514                         }
 515
 516                         $s .= "<div id=\"mw-hidden-catlinks\" class=\"mw-hidden-catlinks$class\">" .
 517                                 $this->msg( 'hidden-categories' )->numParams( count( $allCats['hidden'] ) )->escaped() .
 518                                 $colon . '<ul>' . $embed . implode( "{$pop}{$embed}", $allCats['hidden'] ) . $pop . '</ul>' .
 519                                 '</div>';
 520                 }
 521
 522                 # optional 'dmoz-like' category browser. Will be shown under the list
 523                 # of categories an article belong to
 524                 if ( $wgUseCategoryBrowser ) {
 525                         $s .= '<br /><hr />';
 526
 527                         # get a big array of the parents tree
 528                         $parenttree = $this->getTitle()->getParentCategoryTree();
 529                         # Skin object passed by reference cause it can not be
 530                         # accessed under the method subfunction drawCategoryBrowser
 531                         $tempout = explode( "\n", $this->drawCategoryBrowser( $parenttree ) );
 532                         # Clean out bogus first entry and sort them
 533                         unset( $tempout[0] );
 534                         asort( $tempout );
 535                         # Output one per line
 536                         $s .= implode( "<br />\n", $tempout );
 537                 }
 538
 539                 return $s;
 540         }
 541
 542         /**
 543          * Render the array as a series of links.
 544          * @param array $tree categories tree returned by Title::getParentCategoryTree
 545          * @return String separated by &gt;, terminate with "\n"
 546          */
 547         function drawCategoryBrowser( $tree ) {
 548                 $return = '';
 549
 550                 foreach ( $tree as $element => $parent ) {
 551                         if ( empty( $parent ) ) {
 552                                 # element start a new list
 553                                 $return .= "\n";
 554                         } else {
 555                                 # grab the others elements
 556                                 $return .= $this->drawCategoryBrowser( $parent ) . ' &gt; ';
 557                         }
 558
 559                         # add our current element to the list
 560                         $eltitle = Title::newFromText( $element );
 561                         $return .= Linker::link( $eltitle, htmlspecialchars( $eltitle->getText() ) );
 562                 }
 563
 564                 return $return;
 565         }
 566
 567         /**
 568          * @return string
 569          */
 570         function getCategories() {
 571                 $out = $this->getOutput();
 572
 573                 $catlinks = $this->getCategoryLinks();
 574
 575                 $classes = 'catlinks';
 576
 577                 // Check what we're showing
 578                 $allCats = $out->getCategoryLinks();
 579                 $showHidden = $this->getUser()->getBoolOption( 'showhiddencats' ) ||
 580                                                 $this->getTitle()->getNamespace() == NS_CATEGORY;
 581
 582                 if ( empty( $allCats['normal'] ) && !( !empty( $allCats['hidden'] ) && $showHidden ) ) {
 583                         $classes .= ' catlinks-allhidden';
 584                 }
 585
 586                 return "<div id='catlinks' class='$classes'>{$catlinks}</div>";
 587         }
 588
 589         /**
 590          * This runs a hook to allow extensions placing their stuff after content
 591          * and article metadata (e.g. categories).
 592          * Note: This function has nothing to do with afterContent().
 593          *
 594          * This hook is placed here in order to allow using the same hook for all
 595          * skins, both the SkinTemplate based ones and the older ones, which directly
 596          * use this class to get their data.
 597          *
 598          * The output of this function gets processed in SkinTemplate::outputPage() for
 599          * the SkinTemplate based skins, all other skins should directly echo it.
 600          *
 601          * @return String, empty by default, if not changed by any hook function.
 602          */
 603         protected function afterContentHook() {
 604                 $data = '';
 605
 606                 if ( wfRunHooks( 'SkinAfterContent', array( &$data, $this ) ) ) {
 607                         // adding just some spaces shouldn't toggle the output
 608                         // of the whole <div/>, so we use trim() here
 609                         if ( trim( $data ) != '' ) {
 610                                 // Doing this here instead of in the skins to
 611                                 // ensure that the div has the same ID in all
 612                                 // skins
 613                                 $data = "<div id='mw-data-after-content'>\n" .
 614                                         "\t$data\n" .
 615                                         "</div>\n";
 616                         }
 617                 } else {
 618                         wfDebug( "Hook SkinAfterContent changed output processing.\n" );
 619                 }
 620
 621                 return $data;
 622         }
 623
 624         /**
 625          * Generate debug data HTML for displaying at the bottom of the main content
 626          * area.
 627          * @return String HTML containing debug data, if enabled (otherwise empty).
 628          */
 629         protected function generateDebugHTML() {
 630                 return MWDebug::getHTMLDebugLog();
 631         }
 632
 633         /**
 634          * This gets called shortly before the "</body>" tag.
 635          *
 636          * @return String HTML-wrapped JS code to be put before "</body>"
 637          */
 638         function bottomScripts() {
 639                 // TODO and the suckage continues. This function is really just a wrapper around
 640                 // OutputPage::getBottomScripts() which takes a Skin param. This should be cleaned
 641                 // up at some point
 642                 $bottomScriptText = $this->getOutput()->getBottomScripts();
 643                 wfRunHooks( 'SkinAfterBottomScripts', array( $this, &$bottomScriptText ) );
 644
 645                 return $bottomScriptText;
 646         }
 647
 648         /**
 649          * Text with the permalink to the source page,
 650          * usually shown on the footer of a printed page
 651          *
 652          * @return string HTML text with an URL
 653          */
 654         function printSource() {
 655                 $oldid = $this->getRevisionId();
 656                 if ( $oldid ) {
 657                         $url = htmlspecialchars( wfExpandIRI( $this->getTitle()->getCanonicalURL( 'oldid=' . $oldid ) ) );
 658                 } else {
 659                         // oldid not available for non existing pages
 660                         $url = htmlspecialchars( wfExpandIRI( $this->getTitle()->getCanonicalURL() ) );
 661                 }
 662                 return $this->msg( 'retrievedfrom', '<a href="' . $url . '">' . $url . '</a>' )->text();
 663         }
 664
 665         /**
 666          * @return String
 667          */
 668         function getUndeleteLink() {
 669                 $action = $this->getRequest()->getVal( 'action', 'view' );
 670
 671                 if ( $this->getUser()->isAllowed( 'deletedhistory' ) &&
 672                         ( $this->getTitle()->getArticleID() == 0 || $action == 'history' ) ) {
 673                         $n = $this->getTitle()->isDeleted();
 674
 675                         if ( $n ) {
 676                                 if ( $this->getUser()->isAllowed( 'undelete' ) ) {
 677                                         $msg = 'thisisdeleted';
 678                                 } else {
 679                                         $msg = 'viewdeleted';
 680                                 }
 681
 682                                 return $this->msg( $msg )->rawParams(
 683                                         Linker::linkKnown(
 684                                                 SpecialPage::getTitleFor( 'Undelete', $this->getTitle()->getPrefixedDBkey() ),
 685                                                 $this->msg( 'restorelink' )->numParams( $n )->escaped() )
 686                                         )->text();
 687                         }
 688                 }
 689
 690                 return '';
 691         }
 692
 693         /**
 694          * @return string
 695          */
 696         function subPageSubtitle() {
 697                 global $wgLang;
 698                 $out = $this->getOutput();
 699                 $subpages = '';
 700
 701                 if ( !wfRunHooks( 'SkinSubPageSubtitle', array( &$subpages, $this, $out ) ) ) {
 702                         return $subpages;
 703                 }
 704
 705                 if ( $out->isArticle() && MWNamespace::hasSubpages( $out->getTitle()->getNamespace() ) ) {
 706                         $ptext = $this->getTitle()->getPrefixedText();
 707                         if ( preg_match( '/\//', $ptext ) ) {
 708                                 $links = explode( '/', $ptext );
 709                                 array_pop( $links );
 710                                 $c = 0;
 711                                 $growinglink = '';
 712                                 $display = '';
 713
 714                                 foreach ( $links as $link ) {
 715                                         $growinglink .= $link;
 716                                         $display .= $link;
 717                                         $linkObj = Title::newFromText( $growinglink );
 718
 719                                         if ( is_object( $linkObj ) && $linkObj->isKnown() ) {
 720                                                 $getlink = Linker::linkKnown(
 721                                                         $linkObj,
 722                                                         htmlspecialchars( $display )
 723                                                 );
 724
 725                                                 $c++;
 726
 727                                                 if ( $c > 1 ) {
 728                                                         $subpages .= $wgLang->getDirMarkEntity() . $this->msg( 'pipe-separator' )->escaped();
 729                                                 } else {
 730                                                         $subpages .= '&lt; ';
 731                                                 }
 732
 733                                                 $subpages .= $getlink;
 734                                                 $display = '';
 735                                         } else {
 736                                                 $display .= '/';
 737                                         }
 738                                         $growinglink .= '/';
 739                                 }
 740                         }
 741                 }
 742
 743                 return $subpages;
 744         }
 745
 746         /**
 747          * Returns true if the IP should be shown in the header
 748          * @return Bool
 749          */
 750         function showIPinHeader() {
 751                 global $wgShowIPinHeader;
 752                 return $wgShowIPinHeader && session_id() != '';
 753         }
 754
 755         /**
 756          * @return String
 757          */
 758         function getSearchLink() {
 759                 $searchPage = SpecialPage::getTitleFor( 'Search' );
 760                 return $searchPage->getLocalURL();
 761         }
 762
 763         /**
 764          * @return string
 765          */
 766         function escapeSearchLink() {
 767                 return htmlspecialchars( $this->getSearchLink() );
 768         }
 769
 770         /**
 771          * @param $type string
 772          * @return string
 773          */
 774         function getCopyright( $type = 'detect' ) {
 775                 global $wgRightsPage, $wgRightsUrl, $wgRightsText, $wgContLang;
 776
 777                 if ( $type == 'detect' ) {
 778                         if ( !$this->isRevisionCurrent() && !$this->msg( 'history_copyright' )->inContentLanguage()->isDisabled() ) {
 779                                 $type = 'history';
 780                         } else {
 781                                 $type = 'normal';
 782                         }
 783                 }
 784
 785                 if ( $type == 'history' ) {
 786                         $msg = 'history_copyright';
 787                 } else {
 788                         $msg = 'copyright';
 789                 }
 790
 791                 if ( $wgRightsPage ) {
 792                         $title = Title::newFromText( $wgRightsPage );
 793                         $link = Linker::linkKnown( $title, $wgRightsText );
 794                 } elseif ( $wgRightsUrl ) {
 795                         $link = Linker::makeExternalLink( $wgRightsUrl, $wgRightsText );
 796                 } elseif ( $wgRightsText ) {
 797                         $link = $wgRightsText;
 798                 } else {
 799                         # Give up now
 800                         return '';
 801                 }
 802
 803                 // Allow for site and per-namespace customization of copyright notice.
 804                 $forContent = true;
 805
 806                 wfRunHooks( 'SkinCopyrightFooter', array( $this->getTitle(), $type, &$msg, &$link, &$forContent ) );
 807
 808                 $msgObj = $this->msg( $msg )->rawParams( $link );
 809                 if ( $forContent ) {
 810                         $msg = $msgObj->inContentLanguage()->text();
 811                         if ( $this->getLanguage()->getCode() !== $wgContLang->getCode() ) {
 812                                 $msg = Html::rawElement( 'span', array( 'lang' => $wgContLang->getHtmlCode(), 'dir' => $wgContLang->getDir() ), $msg );
 813                         }
 814                         return $msg;
 815                 } else {
 816                         return $msgObj->text();
 817                 }
 818         }
 819
 820         /**
 821          * @return null|string
 822          */
 823         function getCopyrightIcon() {
 824                 global $wgRightsUrl, $wgRightsText, $wgRightsIcon, $wgCopyrightIcon;
 825
 826                 $out = '';
 827
 828                 if ( isset( $wgCopyrightIcon ) && $wgCopyrightIcon ) {
 829                         $out = $wgCopyrightIcon;
 830                 } elseif ( $wgRightsIcon ) {
 831                         $icon = htmlspecialchars( $wgRightsIcon );
 832
 833                         if ( $wgRightsUrl ) {
 834                                 $url = htmlspecialchars( $wgRightsUrl );
 835                                 $out .= '<a href="' . $url . '">';
 836                         }
 837
 838                         $text = htmlspecialchars( $wgRightsText );
 839                         $out .= "<img src=\"$icon\" alt=\"$text\" width=\"88\" height=\"31\" />";
 840
 841                         if ( $wgRightsUrl ) {
 842                                 $out .= '</a>';
 843                         }
 844                 }
 845
 846                 return $out;
 847         }
 848
 849         /**
 850          * Gets the powered by MediaWiki icon.
 851          * @return string
 852          */
 853         function getPoweredBy() {
 854                 global $wgStylePath;
 855
 856                 $url = htmlspecialchars( "$wgStylePath/common/images/poweredby_mediawiki_88x31.png" );
 857                 $text = '<a href="//www.mediawiki.org/"><img src="' . $url . '" height="31" width="88" alt="Powered by MediaWiki" /></a>';
 858                 wfRunHooks( 'SkinGetPoweredBy', array( &$text, $this ) );
 859                 return $text;
 860         }
 861
 862         /**
 863          * Get the timestamp of the latest revision, formatted in user language
 864          *
 865          * @return String
 866          */
 867         protected function lastModified() {
 868                 $timestamp = $this->getOutput()->getRevisionTimestamp();
 869
 870                 # No cached timestamp, load it from the database
 871                 if ( $timestamp === null ) {
 872                         $timestamp = Revision::getTimestampFromId( $this->getTitle(), $this->getRevisionId() );
 873                 }
 874
 875                 if ( $timestamp ) {
 876                         $d = $this->getLanguage()->userDate( $timestamp, $this->getUser() );
 877                         $t = $this->getLanguage()->userTime( $timestamp, $this->getUser() );
 878                         $s = ' ' . $this->msg( 'lastmodifiedat', $d, $t )->text();
 879                 } else {
 880                         $s = '';
 881                 }
 882
 883                 if ( wfGetLB()->getLaggedSlaveMode() ) {
 884                         $s .= ' <strong>' . $this->msg( 'laggedslavemode' )->text() . '</strong>';
 885                 }
 886
 887                 return $s;
 888         }
 889
 890         /**
 891          * @param $align string
 892          * @return string
 893          */
 894         function logoText( $align = '' ) {
 895                 if ( $align != '' ) {
 896                         $a = " style='float: {$align};'";
 897                 } else {
 898                         $a = '';
 899                 }
 900
 901                 $mp = $this->msg( 'mainpage' )->escaped();
 902                 $mptitle = Title::newMainPage();
 903                 $url = ( is_object( $mptitle ) ? htmlspecialchars( $mptitle->getLocalURL() ) : '' );
 904
 905                 $logourl = $this->getLogo();
 906                 $s = "<a href='{$url}'><img{$a} src='{$logourl}' alt='[{$mp}]' /></a>";
 907
 908                 return $s;
 909         }
 910
 911         /**
 912          * Renders a $wgFooterIcons icon according to the method's arguments
 913          * @param array $icon The icon to build the html for, see $wgFooterIcons for the format of this array
 914          * @param bool|String $withImage Whether to use the icon's image or output a text-only footericon
 915          * @return String HTML
 916          */
 917         function makeFooterIcon( $icon, $withImage = 'withImage' ) {
 918                 if ( is_string( $icon ) ) {
 919                         $html = $icon;
 920                 } else { // Assuming array
 921                         $url = isset( $icon["url"] ) ? $icon["url"] : null;
 922                         unset( $icon["url"] );
 923                         if ( isset( $icon["src"] ) && $withImage === 'withImage' ) {
 924                                 $html = Html::element( 'img', $icon ); // do this the lazy way, just pass icon data as an attribute array
 925                         } else {
 926                                 $html = htmlspecialchars( $icon["alt"] );
 927                         }
 928                         if ( $url ) {
 929                                 $html = Html::rawElement( 'a', array( "href" => $url ), $html );
 930                         }
 931                 }
 932                 return $html;
 933         }
 934
 935         /**
 936          * Gets the link to the wiki's main page.
 937          * @return string
 938          */
 939         function mainPageLink() {
 940                 $s = Linker::linkKnown(
 941                         Title::newMainPage(),
 942                         $this->msg( 'mainpage' )->escaped()
 943                 );
 944
 945                 return $s;
 946         }
 947
 948         /**
 949          * @param $desc
 950          * @param $page
 951          * @return string
 952          */
 953         public function footerLink( $desc, $page ) {
 954                 // if the link description has been set to "-" in the default language,
 955                 if ( $this->msg( $desc )->inContentLanguage()->isDisabled() ) {
 956                         // then it is disabled, for all languages.
 957                         return '';
 958                 } else {
 959                         // Otherwise, we display the link for the user, described in their
 960                         // language (which may or may not be the same as the default language),
 961                         // but we make the link target be the one site-wide page.
 962                         $title = Title::newFromText( $this->msg( $page )->inContentLanguage()->text() );
 963
 964                         return Linker::linkKnown(
 965                                 $title,
 966                                 $this->msg( $desc )->escaped()
 967                         );
 968                 }
 969         }
 970
 971         /**
 972          * Gets the link to the wiki's privacy policy page.
 973          * @return String HTML
 974          */
 975         function privacyLink() {
 976                 return $this->footerLink( 'privacy', 'privacypage' );
 977         }
 978
 979         /**
 980          * Gets the link to the wiki's about page.
 981          * @return String HTML
 982          */
 983         function aboutLink() {
 984                 return $this->footerLink( 'aboutsite', 'aboutpage' );
 985         }
 986
 987         /**
 988          * Gets the link to the wiki's general disclaimers page.
 989          * @return String HTML
 990          */
 991         function disclaimerLink() {
 992                 return $this->footerLink( 'disclaimers', 'disclaimerpage' );
 993         }
 994
 995         /**
 996          * Return URL options for the 'edit page' link.
 997          * This may include an 'oldid' specifier, if the current page view is such.
 998          *
 999          * @return array
1000          * @private
1001          */
1002         function editUrlOptions() {
1003                 $options = array( 'action' => 'edit' );
1004
1005                 if ( !$this->isRevisionCurrent() ) {
1006                         $options['oldid'] = intval( $this->getRevisionId() );
1007                 }
1008
1009                 return $options;
1010         }
1011
1012         /**
1013          * @param $id User|int
1014          * @return bool
1015          */
1016         function showEmailUser( $id ) {
1017                 if ( $id instanceof User ) {
1018                         $targetUser = $id;
1019                 } else {
1020                         $targetUser = User::newFromId( $id );
1021                 }
1022                 return $this->getUser()->canSendEmail() && # the sending user must have a confirmed email address
1023                         $targetUser->canReceiveEmail(); # the target user must have a confirmed email address and allow emails from users
1024         }
1025
1026         /**
1027          * Return a fully resolved style path url to images or styles stored in the common folder.
1028          * This method returns a url resolved using the configured skin style path
1029          * and includes the style version inside of the url.
1030          * @param string $name The name or path of a skin resource file
1031          * @return String The fully resolved style path url including styleversion
1032          */
1033         function getCommonStylePath( $name ) {
1034                 global $wgStylePath, $wgStyleVersion;
1035                 return "$wgStylePath/common/$name?$wgStyleVersion";
1036         }
1037
1038         /**
1039          * Return a fully resolved style path url to images or styles stored in the current skins's folder.
1040          * This method returns a url resolved using the configured skin style path
1041          * and includes the style version inside of the url.
1042          * @param string $name The name or path of a skin resource file
1043          * @return String The fully resolved style path url including styleversion
1044          */
1045         function getSkinStylePath( $name ) {
1046                 global $wgStylePath, $wgStyleVersion;
1047                 return "$wgStylePath/{$this->stylename}/$name?$wgStyleVersion";
1048         }
1049
1050         /* these are used extensively in SkinTemplate, but also some other places */
1051
1052         /**
1053          * @param $urlaction string
1054          * @return String
1055          */
1056         static function makeMainPageUrl( $urlaction = '' ) {
1057                 $title = Title::newMainPage();
1058                 self::checkTitle( $title, '' );
1059
1060                 return $title->getLocalURL( $urlaction );
1061         }
1062
1063         /**
1064          * Make a URL for a Special Page using the given query and protocol.
1065          *
1066          * If $proto is set to null, make a local URL. Otherwise, make a full
1067          * URL with the protocol specified.
1068          *
1069          * @param string $name Name of the Special page
1070          * @param string $urlaction Query to append
1071          * @param $proto Protocol to use or null for a local URL
1072          * @return String
1073          */
1074         static function makeSpecialUrl( $name, $urlaction = '', $proto = null ) {
1075                 $title = SpecialPage::getSafeTitleFor( $name );
1076                 if ( is_null( $proto ) ) {
1077                         return $title->getLocalURL( $urlaction );
1078                 } else {
1079                         return $title->getFullURL( $urlaction, false, $proto );
1080                 }
1081         }
1082
1083         /**
1084          * @param $name string
1085          * @param $subpage string
1086          * @param $urlaction string
1087          * @return String
1088          */
1089         static function makeSpecialUrlSubpage( $name, $subpage, $urlaction = '' ) {
1090                 $title = SpecialPage::getSafeTitleFor( $name, $subpage );
1091                 return $title->getLocalURL( $urlaction );
1092         }
1093
1094         /**
1095          * @param $name string
1096          * @param $urlaction string
1097          * @return String
1098          */
1099         static function makeI18nUrl( $name, $urlaction = '' ) {
1100                 $title = Title::newFromText( wfMessage( $name )->inContentLanguage()->text() );
1101                 self::checkTitle( $title, $name );
1102                 return $title->getLocalURL( $urlaction );
1103         }
1104
1105         /**
1106          * @param $name string
1107          * @param $urlaction string
1108          * @return String
1109          */
1110         static function makeUrl( $name, $urlaction = '' ) {
1111                 $title = Title::newFromText( $name );
1112                 self::checkTitle( $title, $name );
1113
1114                 return $title->getLocalURL( $urlaction );
1115         }
1116
1117         /**
1118          * If url string starts with http, consider as external URL, else
1119          * internal
1120          * @param $name String
1121          * @return String URL
1122          */
1123         static function makeInternalOrExternalUrl( $name ) {
1124                 if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $name ) ) {
1125                         return $name;
1126                 } else {
1127                         return self::makeUrl( $name );
1128                 }
1129         }
1130
1131         /**
1132          * this can be passed the NS number as defined in Language.php
1133          * @param $name
1134          * @param $urlaction string
1135          * @param $namespace int
1136          * @return String
1137          */
1138         static function makeNSUrl( $name, $urlaction = '', $namespace = NS_MAIN ) {
1139                 $title = Title::makeTitleSafe( $namespace, $name );
1140                 self::checkTitle( $title, $name );
1141
1142                 return $title->getLocalURL( $urlaction );
1143         }
1144
1145         /**
1146          * these return an array with the 'href' and boolean 'exists'
1147          * @param $name
1148          * @param $urlaction string
1149          * @return array
1150          */
1151         static function makeUrlDetails( $name, $urlaction = '' ) {
1152                 $title = Title::newFromText( $name );
1153                 self::checkTitle( $title, $name );
1154
1155                 return array(
1156                         'href' => $title->getLocalURL( $urlaction ),
1157                         'exists' => $title->getArticleID() != 0,
1158                 );
1159         }
1160
1161         /**
1162          * Make URL details where the article exists (or at least it's convenient to think so)
1163          * @param string $name Article name
1164          * @param $urlaction String
1165          * @return Array
1166          */
1167         static function makeKnownUrlDetails( $name, $urlaction = '' ) {
1168                 $title = Title::newFromText( $name );
1169                 self::checkTitle( $title, $name );
1170
1171                 return array(
1172                         'href' => $title->getLocalURL( $urlaction ),
1173                         'exists' => true
1174                 );
1175         }
1176
1177         /**
1178          * make sure we have some title to operate on
1179          *
1180          * @param $title Title
1181          * @param $name string
1182          */
1183         static function checkTitle( &$title, $name ) {
1184                 if ( !is_object( $title ) ) {
1185                         $title = Title::newFromText( $name );
1186                         if ( !is_object( $title ) ) {
1187                                 $title = Title::newFromText( '--error: link target missing--' );
1188                         }
1189                 }
1190         }
1191
1192         /**
1193          * Build an array that represents the sidebar(s), the navigation bar among them.
1194          *
1195          * BaseTemplate::getSidebar can be used to simplify the format and id generation in new skins.
1196          *
1197          * The format of the returned array is array( heading => content, ... ), where:
1198          * - heading is the heading of a navigation portlet. It is either:
1199          *   - magic string to be handled by the skins ('SEARCH' / 'LANGUAGES' / 'TOOLBOX' / ...)
1200          *   - a message name (e.g. 'navigation'), the message should be HTML-escaped by the skin
1201          *   - plain text, which should be HTML-escaped by the skin
1202          * - content is the contents of the portlet. It is either:
1203          *   - HTML text (<ul><li>...</li>...</ul>)
1204          *   - array of link data in a format accepted by BaseTemplate::makeListItem()
1205          *   - (for a magic string as a key, any value)
1206          *
1207          * Note that extensions can control the sidebar contents using the SkinBuildSidebar hook
1208          * and can technically insert anything in here; skin creators are expected to handle
1209          * values described above.
1210          *
1211          * @return array
1212          */
1213         function buildSidebar() {
1214                 global $wgMemc, $wgEnableSidebarCache, $wgSidebarCacheExpiry;
1215                 wfProfileIn( __METHOD__ );
1216
1217                 $key = wfMemcKey( 'sidebar', $this->getLanguage()->getCode() );
1218
1219                 if ( $wgEnableSidebarCache ) {
1220                         $cachedsidebar = $wgMemc->get( $key );
1221                         if ( $cachedsidebar ) {
1222                                 wfProfileOut( __METHOD__ );
1223                                 return $cachedsidebar;
1224                         }
1225                 }
1226
1227                 $bar = array();
1228                 $this->addToSidebar( $bar, 'sidebar' );
1229
1230                 wfRunHooks( 'SkinBuildSidebar', array( $this, &$bar ) );
1231                 if ( $wgEnableSidebarCache ) {
1232                         $wgMemc->set( $key, $bar, $wgSidebarCacheExpiry );
1233                 }
1234
1235                 wfProfileOut( __METHOD__ );
1236                 return $bar;
1237         }
1238         /**
1239          * Add content from a sidebar system message
1240          * Currently only used for MediaWiki:Sidebar (but may be used by Extensions)
1241          *
1242          * This is just a wrapper around addToSidebarPlain() for backwards compatibility
1243          *
1244          * @param $bar array
1245          * @param $message String
1246          */
1247         function addToSidebar( &$bar, $message ) {
1248                 $this->addToSidebarPlain( $bar, wfMessage( $message )->inContentLanguage()->plain() );
1249         }
1250
1251         /**
1252          * Add content from plain text
1253          * @since 1.17
1254          * @param $bar array
1255          * @param $text string
1256          * @return Array
1257          */
1258         function addToSidebarPlain( &$bar, $text ) {
1259                 $lines = explode( "\n", $text );
1260
1261                 $heading = '';
1262
1263                 foreach ( $lines as $line ) {
1264                         if ( strpos( $line, '*' ) !== 0 ) {
1265                                 continue;
1266                         }
1267                         $line = rtrim( $line, "\r" ); // for Windows compat
1268
1269                         if ( strpos( $line, '**' ) !== 0 ) {
1270                                 $heading = trim( $line, '* ' );
1271                                 if ( !array_key_exists( $heading, $bar ) ) {
1272                                         $bar[$heading] = array();
1273                                 }
1274                         } else {
1275                                 $line = trim( $line, '* ' );
1276
1277                                 if ( strpos( $line, '|' ) !== false ) { // sanity check
1278                                         $line = MessageCache::singleton()->transform( $line, false, null, $this->getTitle() );
1279                                         $line = array_map( 'trim', explode( '|', $line, 2 ) );
1280                                         if ( count( $line ) !== 2 ) {
1281                                                 // Second sanity check, could be hit by people doing
1282                                                 // funky stuff with parserfuncs... (bug 33321)
1283                                                 continue;
1284                                         }
1285
1286                                         $extraAttribs = array();
1287
1288                                         $msgLink = $this->msg( $line[0] )->inContentLanguage();
1289                                         if ( $msgLink->exists() ) {
1290                                                 $link = $msgLink->text();
1291                                                 if ( $link == '-' ) {
1292                                                         continue;
1293                                                 }
1294                                         } else {
1295                                                 $link = $line[0];
1296                                         }
1297                                         $msgText = $this->msg( $line[1] );
1298                                         if ( $msgText->exists() ) {
1299                                                 $text = $msgText->text();
1300                                         } else {
1301                                                 $text = $line[1];
1302                                         }
1303
1304                                         if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $link ) ) {
1305                                                 $href = $link;
1306
1307                                                 // Parser::getExternalLinkAttribs won't work here because of the Namespace things
1308                                                 global $wgNoFollowLinks, $wgNoFollowDomainExceptions;
1309                                                 if ( $wgNoFollowLinks && !wfMatchesDomainList( $href, $wgNoFollowDomainExceptions ) ) {
1310                                                         $extraAttribs['rel'] = 'nofollow';
1311                                                 }
1312
1313                                                 global $wgExternalLinkTarget;
1314                                                 if ( $wgExternalLinkTarget ) {
1315                                                         $extraAttribs['target'] = $wgExternalLinkTarget;
1316                                                 }
1317                                         } else {
1318                                                 $title = Title::newFromText( $link );
1319
1320                                                 if ( $title ) {
1321                                                         $title = $title->fixSpecialName();
1322                                                         $href = $title->getLinkURL();
1323                                                 } else {
1324                                                         $href = 'INVALID-TITLE';
1325                                                 }
1326                                         }
1327
1328                                         $bar[$heading][] = array_merge( array(
1329                                                 'text' => $text,
1330                                                 'href' => $href,
1331                                                 'id' => 'n-' . Sanitizer::escapeId( strtr( $line[1], ' ', '-' ), 'noninitial' ),
1332                                                 'active' => false
1333                                         ), $extraAttribs );
1334                                 } else {
1335                                         continue;
1336                                 }
1337                         }
1338                 }
1339
1340                 return $bar;
1341         }
1342
1343         /**
1344          * Should we load mediawiki.legacy.wikiprintable?  Skins that have their own
1345          * print stylesheet should override this and return false.  (This is an
1346          * ugly hack to get Monobook to play nicely with OutputPage::headElement().)
1347          *
1348          * @return bool
1349          */
1350         public function commonPrintStylesheet() {
1351                 return true;
1352         }
1353
1354         /**
1355          * Gets new talk page messages for the current user and returns an
1356          * appropriate alert message (or an empty string if there are no messages)
1357          * @return String
1358          */
1359         function getNewtalks() {
1360
1361                 $newMessagesAlert = '';
1362                 $user = $this->getUser();
1363                 $newtalks = $user->getNewMessageLinks();
1364                 $out = $this->getOutput();
1365
1366                 // Allow extensions to disable or modify the new messages alert
1367                 if ( !wfRunHooks( 'GetNewMessagesAlert', array( &$newMessagesAlert, $newtalks, $user, $out ) ) ) {
1368                         return '';
1369                 }
1370                 if ( $newMessagesAlert ) {
1371                         return $newMessagesAlert;
1372                 }
1373
1374                 if ( count( $newtalks ) == 1 && $newtalks[0]['wiki'] === wfWikiID() ) {
1375                         $uTalkTitle = $user->getTalkPage();
1376
1377                         if ( !$uTalkTitle->equals( $out->getTitle() ) ) {
1378                                 $lastSeenRev = isset( $newtalks[0]['rev'] ) ? $newtalks[0]['rev'] : null;
1379                                 $nofAuthors = 0;
1380                                 if ( $lastSeenRev !== null ) {
1381                                         $plural = true; // Default if we have a last seen revision: if unknown, use plural
1382                                         $latestRev = Revision::newFromTitle( $uTalkTitle, false, Revision::READ_NORMAL );
1383                                         if ( $latestRev !== null ) {
1384                                                 // Singular if only 1 unseen revision, plural if several unseen revisions.
1385                                                 $plural = $latestRev->getParentId() !== $lastSeenRev->getId();
1386                                                 $nofAuthors = $uTalkTitle->countAuthorsBetween(
1387                                                         $lastSeenRev, $latestRev, 10, 'include_new' );
1388                                         }
1389                                 } else {
1390                                         // Singular if no revision -> diff link will show latest change only in any case
1391                                         $plural = false;
1392                                 }
1393                                 $plural = $plural ? 2 : 1;
1394                                 // 2 signifies "more than one revision". We don't know how many, and even if we did,
1395                                 // the number of revisions or authors is not necessarily the same as the number of
1396                                 // "messages".
1397                                 $newMessagesLink = Linker::linkKnown(
1398                                         $uTalkTitle,
1399                                         $this->msg( 'newmessageslinkplural' )->params( $plural )->escaped(),
1400                                         array(),
1401                                         array( 'redirect' => 'no' )
1402                                 );
1403
1404                                 $newMessagesDiffLink = Linker::linkKnown(
1405                                         $uTalkTitle,
1406                                         $this->msg( 'newmessagesdifflinkplural' )->params( $plural )->escaped(),
1407                                         array(),
1408                                         $lastSeenRev !== null
1409                                                 ? array( 'oldid' => $lastSeenRev->getId(), 'diff' => 'cur' )
1410                                                 : array( 'diff' => 'cur' )
1411                                 );
1412
1413                                 if ( $nofAuthors >= 1 && $nofAuthors <= 10 ) {
1414                                         $newMessagesAlert = $this->msg(
1415                                                 'youhavenewmessagesfromusers',
1416                                                 $newMessagesLink,
1417                                                 $newMessagesDiffLink
1418                                         )->numParams( $nofAuthors );
1419                                 } else {
1420                                         // $nofAuthors === 11 signifies "11 or more" ("more than 10")
1421                                         $newMessagesAlert = $this->msg(
1422                                                 $nofAuthors > 10 ? 'youhavenewmessagesmanyusers' : 'youhavenewmessages',
1423                                                 $newMessagesLink,
1424                                                 $newMessagesDiffLink
1425                                         );
1426                                 }
1427                                 $newMessagesAlert = $newMessagesAlert->text();
1428                                 # Disable Squid cache
1429                                 $out->setSquidMaxage( 0 );
1430                         }
1431                 } elseif ( count( $newtalks ) ) {
1432                         $sep = $this->msg( 'newtalkseparator' )->escaped();
1433                         $msgs = array();
1434
1435                         foreach ( $newtalks as $newtalk ) {
1436                                 $msgs[] = Xml::element(
1437                                         'a',
1438                                         array( 'href' => $newtalk['link'] ), $newtalk['wiki']
1439                                 );
1440                         }
1441                         $parts = implode( $sep, $msgs );
1442                         $newMessagesAlert = $this->msg( 'youhavenewmessagesmulti' )->rawParams( $parts )->escaped();
1443                         $out->setSquidMaxage( 0 );
1444                 }
1445
1446                 return $newMessagesAlert;
1447         }
1448
1449         /**
1450          * Get a cached notice
1451          *
1452          * @param string $name message name, or 'default' for $wgSiteNotice
1453          * @return String: HTML fragment
1454          */
1455         private function getCachedNotice( $name ) {
1456                 global $wgRenderHashAppend, $parserMemc, $wgContLang;
1457
1458                 wfProfileIn( __METHOD__ );
1459
1460                 $needParse = false;
1461
1462                 if ( $name === 'default' ) {
1463                         // special case
1464                         global $wgSiteNotice;
1465                         $notice = $wgSiteNotice;
1466                         if ( empty( $notice ) ) {
1467                                 wfProfileOut( __METHOD__ );
1468                                 return false;
1469                         }
1470                 } else {
1471                         $msg = $this->msg( $name )->inContentLanguage();
1472                         if ( $msg->isDisabled() ) {
1473                                 wfProfileOut( __METHOD__ );
1474                                 return false;
1475                         }
1476                         $notice = $msg->plain();
1477                 }
1478
1479                 // Use the extra hash appender to let eg SSL variants separately cache.
1480                 $key = wfMemcKey( $name . $wgRenderHashAppend );
1481                 $cachedNotice = $parserMemc->get( $key );
1482                 if ( is_array( $cachedNotice ) ) {
1483                         if ( md5( $notice ) == $cachedNotice['hash'] ) {
1484                                 $notice = $cachedNotice['html'];
1485                         } else {
1486                                 $needParse = true;
1487                         }
1488                 } else {
1489                         $needParse = true;
1490                 }
1491
1492                 if ( $needParse ) {
1493                         $parsed = $this->getOutput()->parse( $notice );
1494                         $parserMemc->set( $key, array( 'html' => $parsed, 'hash' => md5( $notice ) ), 600 );
1495                         $notice = $parsed;
1496                 }
1497
1498                 $notice = Html::rawElement( 'div', array( 'id' => 'localNotice',
1499                         'lang' => $wgContLang->getHtmlCode(), 'dir' => $wgContLang->getDir() ), $notice );
1500                 wfProfileOut( __METHOD__ );
1501                 return $notice;
1502         }
1503
1504         /**
1505          * Get a notice based on page's namespace
1506          *
1507          * @return String: HTML fragment
1508          */
1509         function getNamespaceNotice() {
1510                 wfProfileIn( __METHOD__ );
1511
1512                 $key = 'namespacenotice-' . $this->getTitle()->getNsText();
1513                 $namespaceNotice = $this->getCachedNotice( $key );
1514                 if ( $namespaceNotice && substr( $namespaceNotice, 0, 7 ) != '<p>&lt;' ) {
1515                         $namespaceNotice = '<div id="namespacebanner">' . $namespaceNotice . '</div>';
1516                 } else {
1517                         $namespaceNotice = '';
1518                 }
1519
1520                 wfProfileOut( __METHOD__ );
1521                 return $namespaceNotice;
1522         }
1523
1524         /**
1525          * Get the site notice
1526          *
1527          * @return String: HTML fragment
1528          */
1529         function getSiteNotice() {
1530                 wfProfileIn( __METHOD__ );
1531                 $siteNotice = '';
1532
1533                 if ( wfRunHooks( 'SiteNoticeBefore', array( &$siteNotice, $this ) ) ) {
1534                         if ( is_object( $this->getUser() ) && $this->getUser()->isLoggedIn() ) {
1535                                 $siteNotice = $this->getCachedNotice( 'sitenotice' );
1536                         } else {
1537                                 $anonNotice = $this->getCachedNotice( 'anonnotice' );
1538                                 if ( !$anonNotice ) {
1539                                         $siteNotice = $this->getCachedNotice( 'sitenotice' );
1540                                 } else {
1541                                         $siteNotice = $anonNotice;
1542                                 }
1543                         }
1544                         if ( !$siteNotice ) {
1545                                 $siteNotice = $this->getCachedNotice( 'default' );
1546                         }
1547                 }
1548
1549                 wfRunHooks( 'SiteNoticeAfter', array( &$siteNotice, $this ) );
1550                 wfProfileOut( __METHOD__ );
1551                 return $siteNotice;
1552         }
1553
1554         /**
1555          * Create a section edit link.  This supersedes editSectionLink() and
1556          * editSectionLinkForOther().
1557          *
1558          * @param $nt      Title  The title being linked to (may not be the same as
1559          *   $wgTitle, if the section is included from a template)
1560          * @param string $section The designation of the section being pointed to,
1561          *   to be included in the link, like "&section=$section"
1562          * @param string $tooltip The tooltip to use for the link: will be escaped
1563          *   and wrapped in the 'editsectionhint' message
1564          * @param $lang    string Language code
1565          * @return         string HTML to use for edit link
1566          */
1567         public function doEditSectionLink( Title $nt, $section, $tooltip = null, $lang = false ) {
1568                 // HTML generated here should probably have userlangattributes
1569                 // added to it for LTR text on RTL pages
1570
1571                 $lang = wfGetLangObj( $lang );
1572
1573                 $attribs = array();
1574                 if ( !is_null( $tooltip ) ) {
1575                         # Bug 25462: undo double-escaping.
1576                         $tooltip = Sanitizer::decodeCharReferences( $tooltip );
1577                         $attribs['title'] = wfMessage( 'editsectionhint' )->rawParams( $tooltip )
1578                                 ->inLanguage( $lang )->text();
1579                 }
1580                 $link = Linker::link( $nt, wfMessage( 'editsection' )->inLanguage( $lang )->text(),
1581                         $attribs,
1582                         array( 'action' => 'edit', 'section' => $section ),
1583                         array( 'noclasses', 'known' )
1584                 );
1585
1586                 # Add the brackets and the span and run the hook.
1587                 $result = '<span class="mw-editsection">'
1588                         . '<span class="mw-editsection-bracket">[</span>'
1589                         . $link
1590                         . '<span class="mw-editsection-bracket">]</span>'
1591                         . '</span>';
1592
1593                 wfRunHooks( 'DoEditSectionLink', array( $this, $nt, $section, $tooltip, &$result, $lang ) );
1594                 return $result;
1595         }
1596
1597         /**
1598          * Use PHP's magic __call handler to intercept legacy calls to the linker
1599          * for backwards compatibility.
1600          *
1601          * @param string $fname Name of called method
1602          * @param array $args Arguments to the method
1603          * @throws MWException
1604          * @return mixed
1605          */
1606         function __call( $fname, $args ) {
1607                 $realFunction = array( 'Linker', $fname );
1608                 if ( is_callable( $realFunction ) ) {
1609                         wfDeprecated( get_class( $this ) . '::' . $fname, '1.21' );
1610                         return call_user_func_array( $realFunction, $args );
1611                 } else {
1612                         $className = get_class( $this );
1613                         throw new MWException( "Call to undefined method $className::$fname" );
1614                 }
1615         }
1616
1617 }