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                         // Give grep a chance to find the usages:
  86                         // skinname-cologneblue, skinname-monobook, skinname-modern, skinname-vector
  87                         $messages[] = "skinname-$skinKey";
  88                 }
  89                 return $messages;
  90         }
  91
  92         /**
  93          * Fetch the list of user-selectable skins in regards to $wgSkipSkins.
  94          * Useful for Special:Preferences and other places where you
  95          * only want to show skins users _can_ use.
  96          * @return array of strings
  97          */
  98         public static function getUsableSkins() {
  99                 global $wgSkipSkins;
 100
 101                 $allowedSkins = self::getSkinNames();
 102
 103                 foreach ( $wgSkipSkins as $skip ) {
 104                         unset( $allowedSkins[$skip] );
 105                 }
 106
 107                 return $allowedSkins;
 108         }
 109
 110         /**
 111          * Normalize a skin preference value to a form that can be loaded.
 112          * If a skin can't be found, it will fall back to the configured
 113          * default (or the old 'Classic' skin if that's broken).
 114          * @param string $key 'monobook', 'standard', etc.
 115          * @return string
 116          */
 117         static function normalizeKey( $key ) {
 118                 global $wgDefaultSkin;
 119
 120                 $skinNames = Skin::getSkinNames();
 121
 122                 if ( $key == '' || $key == 'default' ) {
 123                         // Don't return the default immediately;
 124                         // in a misconfiguration we need to fall back.
 125                         $key = $wgDefaultSkin;
 126                 }
 127
 128                 if ( isset( $skinNames[$key] ) ) {
 129                         return $key;
 130                 }
 131
 132                 // Older versions of the software used a numeric setting
 133                 // in the user preferences.
 134                 $fallback = array(
 135                         0 => $wgDefaultSkin,
 136                         2 => 'cologneblue'
 137                 );
 138
 139                 if ( isset( $fallback[$key] ) ) {
 140                         $key = $fallback[$key];
 141                 }
 142
 143                 if ( isset( $skinNames[$key] ) ) {
 144                         return $key;
 145                 } elseif ( isset( $skinNames[$wgDefaultSkin] ) ) {
 146                         return $wgDefaultSkin;
 147                 } else {
 148                         return 'vector';
 149                 }
 150         }
 151
 152         /**
 153          * Factory method for loading a skin of a given type
 154          * @param string $key 'monobook', 'standard', etc.
 155          * @return Skin
 156          */
 157         static function &newFromKey( $key ) {
 158                 global $wgStyleDirectory;
 159
 160                 $key = Skin::normalizeKey( $key );
 161
 162                 $skinNames = Skin::getSkinNames();
 163                 $skinName = $skinNames[$key];
 164                 $className = "Skin{$skinName}";
 165
 166                 # Grab the skin class and initialise it.
 167                 if ( !class_exists( $className ) ) {
 168
 169                         require_once "{$wgStyleDirectory}/{$skinName}.php";
 170
 171                         # Check if we got if not fallback to default skin
 172                         if ( !class_exists( $className ) ) {
 173                                 # DO NOT die if the class isn't found. This breaks maintenance
 174                                 # scripts and can cause a user account to be unrecoverable
 175                                 # except by SQL manipulation if a previously valid skin name
 176                                 # is no longer valid.
 177                                 wfDebug( "Skin class does not exist: $className\n" );
 178                                 $className = 'SkinVector';
 179                                 require_once "{$wgStyleDirectory}/Vector.php";
 180                         }
 181                 }
 182                 $skin = new $className( $key );
 183                 return $skin;
 184         }
 185
 186         /** @return string skin name */
 187         public function getSkinName() {
 188                 return $this->skinname;
 189         }
 190
 191         /**
 192          * @param $out OutputPage
 193          */
 194         function initPage( OutputPage $out ) {
 195                 wfProfileIn( __METHOD__ );
 196
 197                 $this->preloadExistence();
 198
 199                 wfProfileOut( __METHOD__ );
 200         }
 201
 202         /**
 203          * Defines the ResourceLoader modules that should be added to the skin
 204          * It is recommended that skins wishing to override call parent::getDefaultModules()
 205          * and substitute out any modules they wish to change by using a key to look them up
 206          * @return Array of modules with helper keys for easy overriding
 207          */
 208         public function getDefaultModules() {
 209                 global $wgIncludeLegacyJavaScript, $wgPreloadJavaScriptMwUtil, $wgUseAjax,
 210                         $wgAjaxWatch, $wgEnableAPI, $wgEnableWriteAPI;
 211
 212                 $out = $this->getOutput();
 213                 $user = $out->getUser();
 214                 $modules = array(
 215                         // modules that enhance the page content in some way
 216                         'content' => array(
 217                                 'mediawiki.page.ready',
 218                         ),
 219                         // modules that exist for legacy reasons
 220                         'legacy' => array(),
 221                         // modules relating to search functionality
 222                         'search' => array(),
 223                         // modules relating to functionality relating to watching an article
 224                         'watch' => array(),
 225                         // modules which relate to the current users preferences
 226                         'user' => array(),
 227                 );
 228                 if ( $wgIncludeLegacyJavaScript ) {
 229                         $modules['legacy'][] = 'mediawiki.legacy.wikibits';
 230                 }
 231
 232                 if ( $wgPreloadJavaScriptMwUtil ) {
 233                         $modules['legacy'][] = 'mediawiki.util';
 234                 }
 235
 236                 // Add various resources if required
 237                 if ( $wgUseAjax ) {
 238                         $modules['legacy'][] = 'mediawiki.legacy.ajax';
 239
 240                         if ( $wgEnableAPI ) {
 241                                 if ( $wgEnableWriteAPI && $wgAjaxWatch && $user->isLoggedIn()
 242                                         && $user->isAllowed( 'writeapi' )
 243                                 ) {
 244                                         $modules['watch'][] = 'mediawiki.page.watch.ajax';
 245                                 }
 246
 247                                 if ( !$user->getOption( 'disablesuggest', false ) ) {
 248                                         $modules['search'][] = 'mediawiki.searchSuggest';
 249                                 }
 250                         }
 251                 }
 252
 253                 if ( $user->getBoolOption( 'editsectiononrightclick' ) ) {
 254                         $modules['user'][] = 'mediawiki.action.view.rightClickEdit';
 255                 }
 256
 257                 // Crazy edit-on-double-click stuff
 258                 if ( $out->isArticle() && $user->getOption( 'editondblclick' ) ) {
 259                         $modules['user'][] = 'mediawiki.action.view.dblClickEdit';
 260                 }
 261                 return $modules;
 262         }
 263
 264         /**
 265          * Preload the existence of three commonly-requested pages in a single query
 266          */
 267         function preloadExistence() {
 268                 $user = $this->getUser();
 269
 270                 // User/talk link
 271                 $titles = array( $user->getUserPage(), $user->getTalkPage() );
 272
 273                 // Other tab link
 274                 if ( $this->getTitle()->isSpecialPage() ) {
 275                         // nothing
 276                 } elseif ( $this->getTitle()->isTalkPage() ) {
 277                         $titles[] = $this->getTitle()->getSubjectPage();
 278                 } else {
 279                         $titles[] = $this->getTitle()->getTalkPage();
 280                 }
 281
 282                 $lb = new LinkBatch( $titles );
 283                 $lb->setCaller( __METHOD__ );
 284                 $lb->execute();
 285         }
 286
 287         /**
 288          * Get the current revision ID
 289          *
 290          * @return Integer
 291          */
 292         public function getRevisionId() {
 293                 return $this->getOutput()->getRevisionId();
 294         }
 295
 296         /**
 297          * Whether the revision displayed is the latest revision of the page
 298          *
 299          * @return Boolean
 300          */
 301         public function isRevisionCurrent() {
 302                 $revID = $this->getRevisionId();
 303                 return $revID == 0 || $revID == $this->getTitle()->getLatestRevID();
 304         }
 305
 306         /**
 307          * Set the "relevant" title
 308          * @see self::getRelevantTitle()
 309          * @param $t Title object to use
 310          */
 311         public function setRelevantTitle( $t ) {
 312                 $this->mRelevantTitle = $t;
 313         }
 314
 315         /**
 316          * Return the "relevant" title.
 317          * A "relevant" title is not necessarily the actual title of the page.
 318          * Special pages like Special:MovePage use set the page they are acting on
 319          * as their "relevant" title, this allows the skin system to display things
 320          * such as content tabs which belong to to that page instead of displaying
 321          * a basic special page tab which has almost no meaning.
 322          *
 323          * @return Title
 324          */
 325         public function getRelevantTitle() {
 326                 if ( isset( $this->mRelevantTitle ) ) {
 327                         return $this->mRelevantTitle;
 328                 }
 329                 return $this->getTitle();
 330         }
 331
 332         /**
 333          * Set the "relevant" user
 334          * @see self::getRelevantUser()
 335          * @param $u User object to use
 336          */
 337         public function setRelevantUser( $u ) {
 338                 $this->mRelevantUser = $u;
 339         }
 340
 341         /**
 342          * Return the "relevant" user.
 343          * A "relevant" user is similar to a relevant title. Special pages like
 344          * Special:Contributions mark the user which they are relevant to so that
 345          * things like the toolbox can display the information they usually are only
 346          * able to display on a user's userpage and talkpage.
 347          * @return User
 348          */
 349         public function getRelevantUser() {
 350                 if ( isset( $this->mRelevantUser ) ) {
 351                         return $this->mRelevantUser;
 352                 }
 353                 $title = $this->getRelevantTitle();
 354                 if ( $title->hasSubjectNamespace( NS_USER ) ) {
 355                         $rootUser = $title->getRootText();
 356                         if ( User::isIP( $rootUser ) ) {
 357                                 $this->mRelevantUser = User::newFromName( $rootUser, false );
 358                         } else {
 359                                 $user = User::newFromName( $rootUser, false );
 360                                 if ( $user && $user->isLoggedIn() ) {
 361                                         $this->mRelevantUser = $user;
 362                                 }
 363                         }
 364                         return $this->mRelevantUser;
 365                 }
 366                 return null;
 367         }
 368
 369         /**
 370          * Outputs the HTML generated by other functions.
 371          * @param $out OutputPage
 372          */
 373         abstract function outputPage( OutputPage $out = null );
 374
 375         /**
 376          * @param $data array
 377          * @return string
 378          */
 379         static function makeVariablesScript( $data ) {
 380                 if ( $data ) {
 381                         return Html::inlineScript(
 382                                 ResourceLoader::makeLoaderConditionalScript( ResourceLoader::makeConfigSetScript( $data ) )
 383                         );
 384                 } else {
 385                         return '';
 386                 }
 387         }
 388
 389         /**
 390          * Make a "<script>" tag containing global variables
 391          *
 392          * @deprecated in 1.19
 393          * @param $unused
 394          * @return string HTML fragment
 395          */
 396         public static function makeGlobalVariablesScript( $unused ) {
 397                 global $wgOut;
 398
 399                 wfDeprecated( __METHOD__, '1.19' );
 400
 401                 return self::makeVariablesScript( $wgOut->getJSVars() );
 402         }
 403
 404         /**
 405          * Get the query to generate a dynamic stylesheet
 406          *
 407          * @return array
 408          */
 409         public static function getDynamicStylesheetQuery() {
 410                 global $wgSquidMaxage;
 411
 412                 return array(
 413                                 'action' => 'raw',
 414                                 'maxage' => $wgSquidMaxage,
 415                                 'usemsgcache' => 'yes',
 416                                 'ctype' => 'text/css',
 417                                 'smaxage' => $wgSquidMaxage,
 418                         );
 419         }
 420
 421         /**
 422          * Add skin specific stylesheets
 423          * Calling this method with an $out of anything but the same OutputPage
 424          * inside ->getOutput() is deprecated. The $out arg is kept
 425          * for compatibility purposes with skins.
 426          * @param $out OutputPage
 427          * @todo delete
 428          */
 429         abstract function setupSkinUserCss( OutputPage $out );
 430
 431         /**
 432          * TODO: document
 433          * @param $title Title
 434          * @return String
 435          */
 436         function getPageClasses( $title ) {
 437                 $numeric = 'ns-' . $title->getNamespace();
 438
 439                 if ( $title->isSpecialPage() ) {
 440                         $type = 'ns-special';
 441                         // bug 23315: provide a class based on the canonical special page name without subpages
 442                         list( $canonicalName ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );
 443                         if ( $canonicalName ) {
 444                                 $type .= ' ' . Sanitizer::escapeClass( "mw-special-$canonicalName" );
 445                         } else {
 446                                 $type .= ' mw-invalidspecialpage';
 447                         }
 448                 } elseif ( $title->isTalkPage() ) {
 449                         $type = 'ns-talk';
 450                 } else {
 451                         $type = 'ns-subject';
 452                 }
 453
 454                 $name = Sanitizer::escapeClass( 'page-' . $title->getPrefixedText() );
 455
 456                 return "$numeric $type $name";
 457         }
 458
 459         /**
 460          * This will be called by OutputPage::headElement when it is creating the
 461          * "<body>" tag, skins can override it if they have a need to add in any
 462          * body attributes or classes of their own.
 463          * @param $out OutputPage
 464          * @param $bodyAttrs Array
 465          */
 466         function addToBodyAttributes( $out, &$bodyAttrs ) {
 467                 // does nothing by default
 468         }
 469
 470         /**
 471          * URL to the logo
 472          * @return String
 473          */
 474         function getLogo() {
 475                 global $wgLogo;
 476                 return $wgLogo;
 477         }
 478
 479         /**
 480          * @return string
 481          */
 482         function getCategoryLinks() {
 483                 global $wgUseCategoryBrowser;
 484
 485                 $out = $this->getOutput();
 486                 $allCats = $out->getCategoryLinks();
 487
 488                 if ( !count( $allCats ) ) {
 489                         return '';
 490                 }
 491
 492                 $embed = "<li>";
 493                 $pop = "</li>";
 494
 495                 $s = '';
 496                 $colon = $this->msg( 'colon-separator' )->escaped();
 497
 498                 if ( !empty( $allCats['normal'] ) ) {
 499                         $t = $embed . implode( "{$pop}{$embed}", $allCats['normal'] ) . $pop;
 500
 501                         $msg = $this->msg( 'pagecategories' )->numParams( count( $allCats['normal'] ) )->escaped();
 502                         $linkPage = wfMessage( 'pagecategorieslink' )->inContentLanguage()->text();
 503                         $s .= '<div id="mw-normal-catlinks" class="mw-normal-catlinks">' .
 504                                 Linker::link( Title::newFromText( $linkPage ), $msg )
 505                                 . $colon . '<ul>' . $t . '</ul>' . '</div>';
 506                 }
 507
 508                 # Hidden categories
 509                 if ( isset( $allCats['hidden'] ) ) {
 510                         if ( $this->getUser()->getBoolOption( 'showhiddencats' ) ) {
 511                                 $class = ' mw-hidden-cats-user-shown';
 512                         } elseif ( $this->getTitle()->getNamespace() == NS_CATEGORY ) {
 513                                 $class = ' mw-hidden-cats-ns-shown';
 514                         } else {
 515                                 $class = ' mw-hidden-cats-hidden';
 516                         }
 517
 518                         $s .= "<div id=\"mw-hidden-catlinks\" class=\"mw-hidden-catlinks$class\">" .
 519                                 $this->msg( 'hidden-categories' )->numParams( count( $allCats['hidden'] ) )->escaped() .
 520                                 $colon . '<ul>' . $embed . implode( "{$pop}{$embed}", $allCats['hidden'] ) . $pop . '</ul>' .
 521                                 '</div>';
 522                 }
 523
 524                 # optional 'dmoz-like' category browser. Will be shown under the list
 525                 # of categories an article belong to
 526                 if ( $wgUseCategoryBrowser ) {
 527                         $s .= '<br /><hr />';
 528
 529                         # get a big array of the parents tree
 530                         $parenttree = $this->getTitle()->getParentCategoryTree();
 531                         # Skin object passed by reference cause it can not be
 532                         # accessed under the method subfunction drawCategoryBrowser
 533                         $tempout = explode( "\n", $this->drawCategoryBrowser( $parenttree ) );
 534                         # Clean out bogus first entry and sort them
 535                         unset( $tempout[0] );
 536                         asort( $tempout );
 537                         # Output one per line
 538                         $s .= implode( "<br />\n", $tempout );
 539                 }
 540
 541                 return $s;
 542         }
 543
 544         /**
 545          * Render the array as a series of links.
 546          * @param array $tree categories tree returned by Title::getParentCategoryTree
 547          * @return String separated by &gt;, terminate with "\n"
 548          */
 549         function drawCategoryBrowser( $tree ) {
 550                 $return = '';
 551
 552                 foreach ( $tree as $element => $parent ) {
 553                         if ( empty( $parent ) ) {
 554                                 # element start a new list
 555                                 $return .= "\n";
 556                         } else {
 557                                 # grab the others elements
 558                                 $return .= $this->drawCategoryBrowser( $parent ) . ' &gt; ';
 559                         }
 560
 561                         # add our current element to the list
 562                         $eltitle = Title::newFromText( $element );
 563                         $return .= Linker::link( $eltitle, htmlspecialchars( $eltitle->getText() ) );
 564                 }
 565
 566                 return $return;
 567         }
 568
 569         /**
 570          * @return string
 571          */
 572         function getCategories() {
 573                 $out = $this->getOutput();
 574
 575                 $catlinks = $this->getCategoryLinks();
 576
 577                 $classes = 'catlinks';
 578
 579                 // Check what we're showing
 580                 $allCats = $out->getCategoryLinks();
 581                 $showHidden = $this->getUser()->getBoolOption( 'showhiddencats' ) ||
 582                                                 $this->getTitle()->getNamespace() == NS_CATEGORY;
 583
 584                 if ( empty( $allCats['normal'] ) && !( !empty( $allCats['hidden'] ) && $showHidden ) ) {
 585                         $classes .= ' catlinks-allhidden';
 586                 }
 587
 588                 return "<div id='catlinks' class='$classes'>{$catlinks}</div>";
 589         }
 590
 591         /**
 592          * This runs a hook to allow extensions placing their stuff after content
 593          * and article metadata (e.g. categories).
 594          * Note: This function has nothing to do with afterContent().
 595          *
 596          * This hook is placed here in order to allow using the same hook for all
 597          * skins, both the SkinTemplate based ones and the older ones, which directly
 598          * use this class to get their data.
 599          *
 600          * The output of this function gets processed in SkinTemplate::outputPage() for
 601          * the SkinTemplate based skins, all other skins should directly echo it.
 602          *
 603          * @return String, empty by default, if not changed by any hook function.
 604          */
 605         protected function afterContentHook() {
 606                 $data = '';
 607
 608                 if ( wfRunHooks( 'SkinAfterContent', array( &$data, $this ) ) ) {
 609                         // adding just some spaces shouldn't toggle the output
 610                         // of the whole <div/>, so we use trim() here
 611                         if ( trim( $data ) != '' ) {
 612                                 // Doing this here instead of in the skins to
 613                                 // ensure that the div has the same ID in all
 614                                 // skins
 615                                 $data = "<div id='mw-data-after-content'>\n" .
 616                                         "\t$data\n" .
 617                                         "</div>\n";
 618                         }
 619                 } else {
 620                         wfDebug( "Hook SkinAfterContent changed output processing.\n" );
 621                 }
 622
 623                 return $data;
 624         }
 625
 626         /**
 627          * Generate debug data HTML for displaying at the bottom of the main content
 628          * area.
 629          * @return String HTML containing debug data, if enabled (otherwise empty).
 630          */
 631         protected function generateDebugHTML() {
 632                 return MWDebug::getHTMLDebugLog();
 633         }
 634
 635         /**
 636          * This gets called shortly before the "</body>" tag.
 637          *
 638          * @return String HTML-wrapped JS code to be put before "</body>"
 639          */
 640         function bottomScripts() {
 641                 // TODO and the suckage continues. This function is really just a wrapper around
 642                 // OutputPage::getBottomScripts() which takes a Skin param. This should be cleaned
 643                 // up at some point
 644                 $bottomScriptText = $this->getOutput()->getBottomScripts();
 645                 wfRunHooks( 'SkinAfterBottomScripts', array( $this, &$bottomScriptText ) );
 646
 647                 return $bottomScriptText;
 648         }
 649
 650         /**
 651          * Text with the permalink to the source page,
 652          * usually shown on the footer of a printed page
 653          *
 654          * @return string HTML text with an URL
 655          */
 656         function printSource() {
 657                 $oldid = $this->getRevisionId();
 658                 if ( $oldid ) {
 659                         $url = htmlspecialchars( wfExpandIRI( $this->getTitle()->getCanonicalURL( 'oldid=' . $oldid ) ) );
 660                 } else {
 661                         // oldid not available for non existing pages
 662                         $url = htmlspecialchars( wfExpandIRI( $this->getTitle()->getCanonicalURL() ) );
 663                 }
 664                 return $this->msg( 'retrievedfrom', '<a href="' . $url . '">' . $url . '</a>' )->text();
 665         }
 666
 667         /**
 668          * @return String
 669          */
 670         function getUndeleteLink() {
 671                 $action = $this->getRequest()->getVal( 'action', 'view' );
 672
 673                 if ( $this->getUser()->isAllowed( 'deletedhistory' ) &&
 674                         ( $this->getTitle()->getArticleID() == 0 || $action == 'history' ) ) {
 675                         $n = $this->getTitle()->isDeleted();
 676
 677                         if ( $n ) {
 678                                 if ( $this->getUser()->isAllowed( 'undelete' ) ) {
 679                                         $msg = 'thisisdeleted';
 680                                 } else {
 681                                         $msg = 'viewdeleted';
 682                                 }
 683
 684                                 return $this->msg( $msg )->rawParams(
 685                                         Linker::linkKnown(
 686                                                 SpecialPage::getTitleFor( 'Undelete', $this->getTitle()->getPrefixedDBkey() ),
 687                                                 $this->msg( 'restorelink' )->numParams( $n )->escaped() )
 688                                         )->text();
 689                         }
 690                 }
 691
 692                 return '';
 693         }
 694
 695         /**
 696          * @return string
 697          */
 698         function subPageSubtitle() {
 699                 global $wgLang;
 700                 $out = $this->getOutput();
 701                 $subpages = '';
 702
 703                 if ( !wfRunHooks( 'SkinSubPageSubtitle', array( &$subpages, $this, $out ) ) ) {
 704                         return $subpages;
 705                 }
 706
 707                 if ( $out->isArticle() && MWNamespace::hasSubpages( $out->getTitle()->getNamespace() ) ) {
 708                         $ptext = $this->getTitle()->getPrefixedText();
 709                         if ( preg_match( '/\//', $ptext ) ) {
 710                                 $links = explode( '/', $ptext );
 711                                 array_pop( $links );
 712                                 $c = 0;
 713                                 $growinglink = '';
 714                                 $display = '';
 715
 716                                 foreach ( $links as $link ) {
 717                                         $growinglink .= $link;
 718                                         $display .= $link;
 719                                         $linkObj = Title::newFromText( $growinglink );
 720
 721                                         if ( is_object( $linkObj ) && $linkObj->isKnown() ) {
 722                                                 $getlink = Linker::linkKnown(
 723                                                         $linkObj,
 724                                                         htmlspecialchars( $display )
 725                                                 );
 726
 727                                                 $c++;
 728
 729                                                 if ( $c > 1 ) {
 730                                                         $subpages .= $wgLang->getDirMarkEntity() . $this->msg( 'pipe-separator' )->escaped();
 731                                                 } else {
 732                                                         $subpages .= '&lt; ';
 733                                                 }
 734
 735                                                 $subpages .= $getlink;
 736                                                 $display = '';
 737                                         } else {
 738                                                 $display .= '/';
 739                                         }
 740                                         $growinglink .= '/';
 741                                 }
 742                         }
 743                 }
 744
 745                 return $subpages;
 746         }
 747
 748         /**
 749          * Returns true if the IP should be shown in the header
 750          * @return Bool
 751          */
 752         function showIPinHeader() {
 753                 global $wgShowIPinHeader;
 754                 return $wgShowIPinHeader && session_id() != '';
 755         }
 756
 757         /**
 758          * @return String
 759          */
 760         function getSearchLink() {
 761                 $searchPage = SpecialPage::getTitleFor( 'Search' );
 762                 return $searchPage->getLocalURL();
 763         }
 764
 765         /**
 766          * @return string
 767          */
 768         function escapeSearchLink() {
 769                 return htmlspecialchars( $this->getSearchLink() );
 770         }
 771
 772         /**
 773          * @param $type string
 774          * @return string
 775          */
 776         function getCopyright( $type = 'detect' ) {
 777                 global $wgRightsPage, $wgRightsUrl, $wgRightsText, $wgContLang;
 778
 779                 if ( $type == 'detect' ) {
 780                         if ( !$this->isRevisionCurrent() && !$this->msg( 'history_copyright' )->inContentLanguage()->isDisabled() ) {
 781                                 $type = 'history';
 782                         } else {
 783                                 $type = 'normal';
 784                         }
 785                 }
 786
 787                 if ( $type == 'history' ) {
 788                         $msg = 'history_copyright';
 789                 } else {
 790                         $msg = 'copyright';
 791                 }
 792
 793                 if ( $wgRightsPage ) {
 794                         $title = Title::newFromText( $wgRightsPage );
 795                         $link = Linker::linkKnown( $title, $wgRightsText );
 796                 } elseif ( $wgRightsUrl ) {
 797                         $link = Linker::makeExternalLink( $wgRightsUrl, $wgRightsText );
 798                 } elseif ( $wgRightsText ) {
 799                         $link = $wgRightsText;
 800                 } else {
 801                         # Give up now
 802                         return '';
 803                 }
 804
 805                 // Allow for site and per-namespace customization of copyright notice.
 806                 $forContent = true;
 807
 808                 wfRunHooks( 'SkinCopyrightFooter', array( $this->getTitle(), $type, &$msg, &$link, &$forContent ) );
 809
 810                 $msgObj = $this->msg( $msg )->rawParams( $link );
 811                 if ( $forContent ) {
 812                         $msg = $msgObj->inContentLanguage()->text();
 813                         if ( $this->getLanguage()->getCode() !== $wgContLang->getCode() ) {
 814                                 $msg = Html::rawElement( 'span', array( 'lang' => $wgContLang->getHtmlCode(), 'dir' => $wgContLang->getDir() ), $msg );
 815                         }
 816                         return $msg;
 817                 } else {
 818                         return $msgObj->text();
 819                 }
 820         }
 821
 822         /**
 823          * @return null|string
 824          */
 825         function getCopyrightIcon() {
 826                 global $wgRightsUrl, $wgRightsText, $wgRightsIcon, $wgCopyrightIcon;
 827
 828                 $out = '';
 829
 830                 if ( isset( $wgCopyrightIcon ) && $wgCopyrightIcon ) {
 831                         $out = $wgCopyrightIcon;
 832                 } elseif ( $wgRightsIcon ) {
 833                         $icon = htmlspecialchars( $wgRightsIcon );
 834
 835                         if ( $wgRightsUrl ) {
 836                                 $url = htmlspecialchars( $wgRightsUrl );
 837                                 $out .= '<a href="' . $url . '">';
 838                         }
 839
 840                         $text = htmlspecialchars( $wgRightsText );
 841                         $out .= "<img src=\"$icon\" alt=\"$text\" width=\"88\" height=\"31\" />";
 842
 843                         if ( $wgRightsUrl ) {
 844                                 $out .= '</a>';
 845                         }
 846                 }
 847
 848                 return $out;
 849         }
 850
 851         /**
 852          * Gets the powered by MediaWiki icon.
 853          * @return string
 854          */
 855         function getPoweredBy() {
 856                 global $wgStylePath;
 857
 858                 $url = htmlspecialchars( "$wgStylePath/common/images/poweredby_mediawiki_88x31.png" );
 859                 $text = '<a href="//www.mediawiki.org/"><img src="' . $url . '" height="31" width="88" alt="Powered by MediaWiki" /></a>';
 860                 wfRunHooks( 'SkinGetPoweredBy', array( &$text, $this ) );
 861                 return $text;
 862         }
 863
 864         /**
 865          * Get the timestamp of the latest revision, formatted in user language
 866          *
 867          * @return String
 868          */
 869         protected function lastModified() {
 870                 $timestamp = $this->getOutput()->getRevisionTimestamp();
 871
 872                 # No cached timestamp, load it from the database
 873                 if ( $timestamp === null ) {
 874                         $timestamp = Revision::getTimestampFromId( $this->getTitle(), $this->getRevisionId() );
 875                 }
 876
 877                 if ( $timestamp ) {
 878                         $d = $this->getLanguage()->userDate( $timestamp, $this->getUser() );
 879                         $t = $this->getLanguage()->userTime( $timestamp, $this->getUser() );
 880                         $s = ' ' . $this->msg( 'lastmodifiedat', $d, $t )->text();
 881                 } else {
 882                         $s = '';
 883                 }
 884
 885                 if ( wfGetLB()->getLaggedSlaveMode() ) {
 886                         $s .= ' <strong>' . $this->msg( 'laggedslavemode' )->text() . '</strong>';
 887                 }
 888
 889                 return $s;
 890         }
 891
 892         /**
 893          * @param $align string
 894          * @return string
 895          */
 896         function logoText( $align = '' ) {
 897                 if ( $align != '' ) {
 898                         $a = " style='float: {$align};'";
 899                 } else {
 900                         $a = '';
 901                 }
 902
 903                 $mp = $this->msg( 'mainpage' )->escaped();
 904                 $mptitle = Title::newMainPage();
 905                 $url = ( is_object( $mptitle ) ? htmlspecialchars( $mptitle->getLocalURL() ) : '' );
 906
 907                 $logourl = $this->getLogo();
 908                 $s = "<a href='{$url}'><img{$a} src='{$logourl}' alt='[{$mp}]' /></a>";
 909
 910                 return $s;
 911         }
 912
 913         /**
 914          * Renders a $wgFooterIcons icon according to the method's arguments
 915          * @param array $icon The icon to build the html for, see $wgFooterIcons for the format of this array
 916          * @param bool|String $withImage Whether to use the icon's image or output a text-only footericon
 917          * @return String HTML
 918          */
 919         function makeFooterIcon( $icon, $withImage = 'withImage' ) {
 920                 if ( is_string( $icon ) ) {
 921                         $html = $icon;
 922                 } else { // Assuming array
 923                         $url = isset( $icon["url"] ) ? $icon["url"] : null;
 924                         unset( $icon["url"] );
 925                         if ( isset( $icon["src"] ) && $withImage === 'withImage' ) {
 926                                 $html = Html::element( 'img', $icon ); // do this the lazy way, just pass icon data as an attribute array
 927                         } else {
 928                                 $html = htmlspecialchars( $icon["alt"] );
 929                         }
 930                         if ( $url ) {
 931                                 $html = Html::rawElement( 'a', array( "href" => $url ), $html );
 932                         }
 933                 }
 934                 return $html;
 935         }
 936
 937         /**
 938          * Gets the link to the wiki's main page.
 939          * @return string
 940          */
 941         function mainPageLink() {
 942                 $s = Linker::linkKnown(
 943                         Title::newMainPage(),
 944                         $this->msg( 'mainpage' )->escaped()
 945                 );
 946
 947                 return $s;
 948         }
 949
 950         /**
 951          * @param $desc
 952          * @param $page
 953          * @return string
 954          */
 955         public function footerLink( $desc, $page ) {
 956                 // if the link description has been set to "-" in the default language,
 957                 if ( $this->msg( $desc )->inContentLanguage()->isDisabled() ) {
 958                         // then it is disabled, for all languages.
 959                         return '';
 960                 } else {
 961                         // Otherwise, we display the link for the user, described in their
 962                         // language (which may or may not be the same as the default language),
 963                         // but we make the link target be the one site-wide page.
 964                         $title = Title::newFromText( $this->msg( $page )->inContentLanguage()->text() );
 965
 966                         return Linker::linkKnown(
 967                                 $title,
 968                                 $this->msg( $desc )->escaped()
 969                         );
 970                 }
 971         }
 972
 973         /**
 974          * Gets the link to the wiki's privacy policy page.
 975          * @return String HTML
 976          */
 977         function privacyLink() {
 978                 return $this->footerLink( 'privacy', 'privacypage' );
 979         }
 980
 981         /**
 982          * Gets the link to the wiki's about page.
 983          * @return String HTML
 984          */
 985         function aboutLink() {
 986                 return $this->footerLink( 'aboutsite', 'aboutpage' );
 987         }
 988
 989         /**
 990          * Gets the link to the wiki's general disclaimers page.
 991          * @return String HTML
 992          */
 993         function disclaimerLink() {
 994                 return $this->footerLink( 'disclaimers', 'disclaimerpage' );
 995         }
 996
 997         /**
 998          * Return URL options for the 'edit page' link.
 999          * This may include an 'oldid' specifier, if the current page view is such.
1000          *
1001          * @return array
1002          * @private
1003          */
1004         function editUrlOptions() {
1005                 $options = array( 'action' => 'edit' );
1006
1007                 if ( !$this->isRevisionCurrent() ) {
1008                         $options['oldid'] = intval( $this->getRevisionId() );
1009                 }
1010
1011                 return $options;
1012         }
1013
1014         /**
1015          * @param $id User|int
1016          * @return bool
1017          */
1018         function showEmailUser( $id ) {
1019                 if ( $id instanceof User ) {
1020                         $targetUser = $id;
1021                 } else {
1022                         $targetUser = User::newFromId( $id );
1023                 }
1024                 return $this->getUser()->canSendEmail() && # the sending user must have a confirmed email address
1025                         $targetUser->canReceiveEmail(); # the target user must have a confirmed email address and allow emails from users
1026         }
1027
1028         /**
1029          * Return a fully resolved style path url to images or styles stored in the common folder.
1030          * This method returns a url resolved using the configured skin style path
1031          * and includes the style version inside of the url.
1032          * @param string $name The name or path of a skin resource file
1033          * @return String The fully resolved style path url including styleversion
1034          */
1035         function getCommonStylePath( $name ) {
1036                 global $wgStylePath, $wgStyleVersion;
1037                 return "$wgStylePath/common/$name?$wgStyleVersion";
1038         }
1039
1040         /**
1041          * Return a fully resolved style path url to images or styles stored in the current skins's folder.
1042          * This method returns a url resolved using the configured skin style path
1043          * and includes the style version inside of the url.
1044          * @param string $name The name or path of a skin resource file
1045          * @return String The fully resolved style path url including styleversion
1046          */
1047         function getSkinStylePath( $name ) {
1048                 global $wgStylePath, $wgStyleVersion;
1049                 return "$wgStylePath/{$this->stylename}/$name?$wgStyleVersion";
1050         }
1051
1052         /* these are used extensively in SkinTemplate, but also some other places */
1053
1054         /**
1055          * @param $urlaction string
1056          * @return String
1057          */
1058         static function makeMainPageUrl( $urlaction = '' ) {
1059                 $title = Title::newMainPage();
1060                 self::checkTitle( $title, '' );
1061
1062                 return $title->getLocalURL( $urlaction );
1063         }
1064
1065         /**
1066          * Make a URL for a Special Page using the given query and protocol.
1067          *
1068          * If $proto is set to null, make a local URL. Otherwise, make a full
1069          * URL with the protocol specified.
1070          *
1071          * @param string $name Name of the Special page
1072          * @param string $urlaction Query to append
1073          * @param $proto Protocol to use or null for a local URL
1074          * @return String
1075          */
1076         static function makeSpecialUrl( $name, $urlaction = '', $proto = null ) {
1077                 $title = SpecialPage::getSafeTitleFor( $name );
1078                 if ( is_null( $proto ) ) {
1079                         return $title->getLocalURL( $urlaction );
1080                 } else {
1081                         return $title->getFullURL( $urlaction, false, $proto );
1082                 }
1083         }
1084
1085         /**
1086          * @param $name string
1087          * @param $subpage string
1088          * @param $urlaction string
1089          * @return String
1090          */
1091         static function makeSpecialUrlSubpage( $name, $subpage, $urlaction = '' ) {
1092                 $title = SpecialPage::getSafeTitleFor( $name, $subpage );
1093                 return $title->getLocalURL( $urlaction );
1094         }
1095
1096         /**
1097          * @param $name string
1098          * @param $urlaction string
1099          * @return String
1100          */
1101         static function makeI18nUrl( $name, $urlaction = '' ) {
1102                 $title = Title::newFromText( wfMessage( $name )->inContentLanguage()->text() );
1103                 self::checkTitle( $title, $name );
1104                 return $title->getLocalURL( $urlaction );
1105         }
1106
1107         /**
1108          * @param $name string
1109          * @param $urlaction string
1110          * @return String
1111          */
1112         static function makeUrl( $name, $urlaction = '' ) {
1113                 $title = Title::newFromText( $name );
1114                 self::checkTitle( $title, $name );
1115
1116                 return $title->getLocalURL( $urlaction );
1117         }
1118
1119         /**
1120          * If url string starts with http, consider as external URL, else
1121          * internal
1122          * @param $name String
1123          * @return String URL
1124          */
1125         static function makeInternalOrExternalUrl( $name ) {
1126                 if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $name ) ) {
1127                         return $name;
1128                 } else {
1129                         return self::makeUrl( $name );
1130                 }
1131         }
1132
1133         /**
1134          * this can be passed the NS number as defined in Language.php
1135          * @param $name
1136          * @param $urlaction string
1137          * @param $namespace int
1138          * @return String
1139          */
1140         static function makeNSUrl( $name, $urlaction = '', $namespace = NS_MAIN ) {
1141                 $title = Title::makeTitleSafe( $namespace, $name );
1142                 self::checkTitle( $title, $name );
1143
1144                 return $title->getLocalURL( $urlaction );
1145         }
1146
1147         /**
1148          * these return an array with the 'href' and boolean 'exists'
1149          * @param $name
1150          * @param $urlaction string
1151          * @return array
1152          */
1153         static function makeUrlDetails( $name, $urlaction = '' ) {
1154                 $title = Title::newFromText( $name );
1155                 self::checkTitle( $title, $name );
1156
1157                 return array(
1158                         'href' => $title->getLocalURL( $urlaction ),
1159                         'exists' => $title->getArticleID() != 0,
1160                 );
1161         }
1162
1163         /**
1164          * Make URL details where the article exists (or at least it's convenient to think so)
1165          * @param string $name Article name
1166          * @param $urlaction String
1167          * @return Array
1168          */
1169         static function makeKnownUrlDetails( $name, $urlaction = '' ) {
1170                 $title = Title::newFromText( $name );
1171                 self::checkTitle( $title, $name );
1172
1173                 return array(
1174                         'href' => $title->getLocalURL( $urlaction ),
1175                         'exists' => true
1176                 );
1177         }
1178
1179         /**
1180          * make sure we have some title to operate on
1181          *
1182          * @param $title Title
1183          * @param $name string
1184          */
1185         static function checkTitle( &$title, $name ) {
1186                 if ( !is_object( $title ) ) {
1187                         $title = Title::newFromText( $name );
1188                         if ( !is_object( $title ) ) {
1189                                 $title = Title::newFromText( '--error: link target missing--' );
1190                         }
1191                 }
1192         }
1193
1194         /**
1195          * Build an array that represents the sidebar(s), the navigation bar among them.
1196          *
1197          * BaseTemplate::getSidebar can be used to simplify the format and id generation in new skins.
1198          *
1199          * The format of the returned array is array( heading => content, ... ), where:
1200          * - heading is the heading of a navigation portlet. It is either:
1201          *   - magic string to be handled by the skins ('SEARCH' / 'LANGUAGES' / 'TOOLBOX' / ...)
1202          *   - a message name (e.g. 'navigation'), the message should be HTML-escaped by the skin
1203          *   - plain text, which should be HTML-escaped by the skin
1204          * - content is the contents of the portlet. It is either:
1205          *   - HTML text (<ul><li>...</li>...</ul>)
1206          *   - array of link data in a format accepted by BaseTemplate::makeListItem()
1207          *   - (for a magic string as a key, any value)
1208          *
1209          * Note that extensions can control the sidebar contents using the SkinBuildSidebar hook
1210          * and can technically insert anything in here; skin creators are expected to handle
1211          * values described above.
1212          *
1213          * @return array
1214          */
1215         function buildSidebar() {
1216                 global $wgMemc, $wgEnableSidebarCache, $wgSidebarCacheExpiry;
1217                 wfProfileIn( __METHOD__ );
1218
1219                 $key = wfMemcKey( 'sidebar', $this->getLanguage()->getCode() );
1220
1221                 if ( $wgEnableSidebarCache ) {
1222                         $cachedsidebar = $wgMemc->get( $key );
1223                         if ( $cachedsidebar ) {
1224                                 wfProfileOut( __METHOD__ );
1225                                 return $cachedsidebar;
1226                         }
1227                 }
1228
1229                 $bar = array();
1230                 $this->addToSidebar( $bar, 'sidebar' );
1231
1232                 wfRunHooks( 'SkinBuildSidebar', array( $this, &$bar ) );
1233                 if ( $wgEnableSidebarCache ) {
1234                         $wgMemc->set( $key, $bar, $wgSidebarCacheExpiry );
1235                 }
1236
1237                 wfProfileOut( __METHOD__ );
1238                 return $bar;
1239         }
1240         /**
1241          * Add content from a sidebar system message
1242          * Currently only used for MediaWiki:Sidebar (but may be used by Extensions)
1243          *
1244          * This is just a wrapper around addToSidebarPlain() for backwards compatibility
1245          *
1246          * @param $bar array
1247          * @param $message String
1248          */
1249         function addToSidebar( &$bar, $message ) {
1250                 $this->addToSidebarPlain( $bar, wfMessage( $message )->inContentLanguage()->plain() );
1251         }
1252
1253         /**
1254          * Add content from plain text
1255          * @since 1.17
1256          * @param $bar array
1257          * @param $text string
1258          * @return Array
1259          */
1260         function addToSidebarPlain( &$bar, $text ) {
1261                 $lines = explode( "\n", $text );
1262
1263                 $heading = '';
1264
1265                 foreach ( $lines as $line ) {
1266                         if ( strpos( $line, '*' ) !== 0 ) {
1267                                 continue;
1268                         }
1269                         $line = rtrim( $line, "\r" ); // for Windows compat
1270
1271                         if ( strpos( $line, '**' ) !== 0 ) {
1272                                 $heading = trim( $line, '* ' );
1273                                 if ( !array_key_exists( $heading, $bar ) ) {
1274                                         $bar[$heading] = array();
1275                                 }
1276                         } else {
1277                                 $line = trim( $line, '* ' );
1278
1279                                 if ( strpos( $line, '|' ) !== false ) { // sanity check
1280                                         $line = MessageCache::singleton()->transform( $line, false, null, $this->getTitle() );
1281                                         $line = array_map( 'trim', explode( '|', $line, 2 ) );
1282                                         if ( count( $line ) !== 2 ) {
1283                                                 // Second sanity check, could be hit by people doing
1284                                                 // funky stuff with parserfuncs... (bug 33321)
1285                                                 continue;
1286                                         }
1287
1288                                         $extraAttribs = array();
1289
1290                                         $msgLink = $this->msg( $line[0] )->inContentLanguage();
1291                                         if ( $msgLink->exists() ) {
1292                                                 $link = $msgLink->text();
1293                                                 if ( $link == '-' ) {
1294                                                         continue;
1295                                                 }
1296                                         } else {
1297                                                 $link = $line[0];
1298                                         }
1299                                         $msgText = $this->msg( $line[1] );
1300                                         if ( $msgText->exists() ) {
1301                                                 $text = $msgText->text();
1302                                         } else {
1303                                                 $text = $line[1];
1304                                         }
1305
1306                                         if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $link ) ) {
1307                                                 $href = $link;
1308
1309                                                 // Parser::getExternalLinkAttribs won't work here because of the Namespace things
1310                                                 global $wgNoFollowLinks, $wgNoFollowDomainExceptions;
1311                                                 if ( $wgNoFollowLinks && !wfMatchesDomainList( $href, $wgNoFollowDomainExceptions ) ) {
1312                                                         $extraAttribs['rel'] = 'nofollow';
1313                                                 }
1314
1315                                                 global $wgExternalLinkTarget;
1316                                                 if ( $wgExternalLinkTarget ) {
1317                                                         $extraAttribs['target'] = $wgExternalLinkTarget;
1318                                                 }
1319                                         } else {
1320                                                 $title = Title::newFromText( $link );
1321
1322                                                 if ( $title ) {
1323                                                         $title = $title->fixSpecialName();
1324                                                         $href = $title->getLinkURL();
1325                                                 } else {
1326                                                         $href = 'INVALID-TITLE';
1327                                                 }
1328                                         }
1329
1330                                         $bar[$heading][] = array_merge( array(
1331                                                 'text' => $text,
1332                                                 'href' => $href,
1333                                                 'id' => 'n-' . Sanitizer::escapeId( strtr( $line[1], ' ', '-' ), 'noninitial' ),
1334                                                 'active' => false
1335                                         ), $extraAttribs );
1336                                 } else {
1337                                         continue;
1338                                 }
1339                         }
1340                 }
1341
1342                 return $bar;
1343         }
1344
1345         /**
1346          * Should we load mediawiki.legacy.wikiprintable?  Skins that have their own
1347          * print stylesheet should override this and return false.  (This is an
1348          * ugly hack to get Monobook to play nicely with OutputPage::headElement().)
1349          *
1350          * @return bool
1351          */
1352         public function commonPrintStylesheet() {
1353                 return true;
1354         }
1355
1356         /**
1357          * Gets new talk page messages for the current user and returns an
1358          * appropriate alert message (or an empty string if there are no messages)
1359          * @return String
1360          */
1361         function getNewtalks() {
1362
1363                 $newMessagesAlert = '';
1364                 $user = $this->getUser();
1365                 $newtalks = $user->getNewMessageLinks();
1366                 $out = $this->getOutput();
1367
1368                 // Allow extensions to disable or modify the new messages alert
1369                 if ( !wfRunHooks( 'GetNewMessagesAlert', array( &$newMessagesAlert, $newtalks, $user, $out ) ) ) {
1370                         return '';
1371                 }
1372                 if ( $newMessagesAlert ) {
1373                         return $newMessagesAlert;
1374                 }
1375
1376                 if ( count( $newtalks ) == 1 && $newtalks[0]['wiki'] === wfWikiID() ) {
1377                         $uTalkTitle = $user->getTalkPage();
1378
1379                         if ( !$uTalkTitle->equals( $out->getTitle() ) ) {
1380                                 $lastSeenRev = isset( $newtalks[0]['rev'] ) ? $newtalks[0]['rev'] : null;
1381                                 $nofAuthors = 0;
1382                                 if ( $lastSeenRev !== null ) {
1383                                         $plural = true; // Default if we have a last seen revision: if unknown, use plural
1384                                         $latestRev = Revision::newFromTitle( $uTalkTitle, false, Revision::READ_NORMAL );
1385                                         if ( $latestRev !== null ) {
1386                                                 // Singular if only 1 unseen revision, plural if several unseen revisions.
1387                                                 $plural = $latestRev->getParentId() !== $lastSeenRev->getId();
1388                                                 $nofAuthors = $uTalkTitle->countAuthorsBetween(
1389                                                         $lastSeenRev, $latestRev, 10, 'include_new' );
1390                                         }
1391                                 } else {
1392                                         // Singular if no revision -> diff link will show latest change only in any case
1393                                         $plural = false;
1394                                 }
1395                                 $plural = $plural ? 2 : 1;
1396                                 // 2 signifies "more than one revision". We don't know how many, and even if we did,
1397                                 // the number of revisions or authors is not necessarily the same as the number of
1398                                 // "messages".
1399                                 $newMessagesLink = Linker::linkKnown(
1400                                         $uTalkTitle,
1401                                         $this->msg( 'newmessageslinkplural' )->params( $plural )->escaped(),
1402                                         array(),
1403                                         array( 'redirect' => 'no' )
1404                                 );
1405
1406                                 $newMessagesDiffLink = Linker::linkKnown(
1407                                         $uTalkTitle,
1408                                         $this->msg( 'newmessagesdifflinkplural' )->params( $plural )->escaped(),
1409                                         array(),
1410                                         $lastSeenRev !== null
1411                                                 ? array( 'oldid' => $lastSeenRev->getId(), 'diff' => 'cur' )
1412                                                 : array( 'diff' => 'cur' )
1413                                 );
1414
1415                                 if ( $nofAuthors >= 1 && $nofAuthors <= 10 ) {
1416                                         $newMessagesAlert = $this->msg(
1417                                                 'youhavenewmessagesfromusers',
1418                                                 $newMessagesLink,
1419                                                 $newMessagesDiffLink
1420                                         )->numParams( $nofAuthors );
1421                                 } else {
1422                                         // $nofAuthors === 11 signifies "11 or more" ("more than 10")
1423                                         $newMessagesAlert = $this->msg(
1424                                                 $nofAuthors > 10 ? 'youhavenewmessagesmanyusers' : 'youhavenewmessages',
1425                                                 $newMessagesLink,
1426                                                 $newMessagesDiffLink
1427                                         );
1428                                 }
1429                                 $newMessagesAlert = $newMessagesAlert->text();
1430                                 # Disable Squid cache
1431                                 $out->setSquidMaxage( 0 );
1432                         }
1433                 } elseif ( count( $newtalks ) ) {
1434                         $sep = $this->msg( 'newtalkseparator' )->escaped();
1435                         $msgs = array();
1436
1437                         foreach ( $newtalks as $newtalk ) {
1438                                 $msgs[] = Xml::element(
1439                                         'a',
1440                                         array( 'href' => $newtalk['link'] ), $newtalk['wiki']
1441                                 );
1442                         }
1443                         $parts = implode( $sep, $msgs );
1444                         $newMessagesAlert = $this->msg( 'youhavenewmessagesmulti' )->rawParams( $parts )->escaped();
1445                         $out->setSquidMaxage( 0 );
1446                 }
1447
1448                 return $newMessagesAlert;
1449         }
1450
1451         /**
1452          * Get a cached notice
1453          *
1454          * @param string $name message name, or 'default' for $wgSiteNotice
1455          * @return String: HTML fragment
1456          */
1457         private function getCachedNotice( $name ) {
1458                 global $wgRenderHashAppend, $parserMemc, $wgContLang;
1459
1460                 wfProfileIn( __METHOD__ );
1461
1462                 $needParse = false;
1463
1464                 if ( $name === 'default' ) {
1465                         // special case
1466                         global $wgSiteNotice;
1467                         $notice = $wgSiteNotice;
1468                         if ( empty( $notice ) ) {
1469                                 wfProfileOut( __METHOD__ );
1470                                 return false;
1471                         }
1472                 } else {
1473                         $msg = $this->msg( $name )->inContentLanguage();
1474                         if ( $msg->isDisabled() ) {
1475                                 wfProfileOut( __METHOD__ );
1476                                 return false;
1477                         }
1478                         $notice = $msg->plain();
1479                 }
1480
1481                 // Use the extra hash appender to let eg SSL variants separately cache.
1482                 $key = wfMemcKey( $name . $wgRenderHashAppend );
1483                 $cachedNotice = $parserMemc->get( $key );
1484                 if ( is_array( $cachedNotice ) ) {
1485                         if ( md5( $notice ) == $cachedNotice['hash'] ) {
1486                                 $notice = $cachedNotice['html'];
1487                         } else {
1488                                 $needParse = true;
1489                         }
1490                 } else {
1491                         $needParse = true;
1492                 }
1493
1494                 if ( $needParse ) {
1495                         $parsed = $this->getOutput()->parse( $notice );
1496                         $parserMemc->set( $key, array( 'html' => $parsed, 'hash' => md5( $notice ) ), 600 );
1497                         $notice = $parsed;
1498                 }
1499
1500                 $notice = Html::rawElement( 'div', array( 'id' => 'localNotice',
1501                         'lang' => $wgContLang->getHtmlCode(), 'dir' => $wgContLang->getDir() ), $notice );
1502                 wfProfileOut( __METHOD__ );
1503                 return $notice;
1504         }
1505
1506         /**
1507          * Get a notice based on page's namespace
1508          *
1509          * @return String: HTML fragment
1510          */
1511         function getNamespaceNotice() {
1512                 wfProfileIn( __METHOD__ );
1513
1514                 $key = 'namespacenotice-' . $this->getTitle()->getNsText();
1515                 $namespaceNotice = $this->getCachedNotice( $key );
1516                 if ( $namespaceNotice && substr( $namespaceNotice, 0, 7 ) != '<p>&lt;' ) {
1517                         $namespaceNotice = '<div id="namespacebanner">' . $namespaceNotice . '</div>';
1518                 } else {
1519                         $namespaceNotice = '';
1520                 }
1521
1522                 wfProfileOut( __METHOD__ );
1523                 return $namespaceNotice;
1524         }
1525
1526         /**
1527          * Get the site notice
1528          *
1529          * @return String: HTML fragment
1530          */
1531         function getSiteNotice() {
1532                 wfProfileIn( __METHOD__ );
1533                 $siteNotice = '';
1534
1535                 if ( wfRunHooks( 'SiteNoticeBefore', array( &$siteNotice, $this ) ) ) {
1536                         if ( is_object( $this->getUser() ) && $this->getUser()->isLoggedIn() ) {
1537                                 $siteNotice = $this->getCachedNotice( 'sitenotice' );
1538                         } else {
1539                                 $anonNotice = $this->getCachedNotice( 'anonnotice' );
1540                                 if ( !$anonNotice ) {
1541                                         $siteNotice = $this->getCachedNotice( 'sitenotice' );
1542                                 } else {
1543                                         $siteNotice = $anonNotice;
1544                                 }
1545                         }
1546                         if ( !$siteNotice ) {
1547                                 $siteNotice = $this->getCachedNotice( 'default' );
1548                         }
1549                 }
1550
1551                 wfRunHooks( 'SiteNoticeAfter', array( &$siteNotice, $this ) );
1552                 wfProfileOut( __METHOD__ );
1553                 return $siteNotice;
1554         }
1555
1556         /**
1557          * Create a section edit link.  This supersedes editSectionLink() and
1558          * editSectionLinkForOther().
1559          *
1560          * @param $nt      Title  The title being linked to (may not be the same as
1561          *   $wgTitle, if the section is included from a template)
1562          * @param string $section The designation of the section being pointed to,
1563          *   to be included in the link, like "&section=$section"
1564          * @param string $tooltip The tooltip to use for the link: will be escaped
1565          *   and wrapped in the 'editsectionhint' message
1566          * @param $lang    string Language code
1567          * @return         string HTML to use for edit link
1568          */
1569         public function doEditSectionLink( Title $nt, $section, $tooltip = null, $lang = false ) {
1570                 // HTML generated here should probably have userlangattributes
1571                 // added to it for LTR text on RTL pages
1572
1573                 $lang = wfGetLangObj( $lang );
1574
1575                 $attribs = array();
1576                 if ( !is_null( $tooltip ) ) {
1577                         # Bug 25462: undo double-escaping.
1578                         $tooltip = Sanitizer::decodeCharReferences( $tooltip );
1579                         $attribs['title'] = wfMessage( 'editsectionhint' )->rawParams( $tooltip )
1580                                 ->inLanguage( $lang )->text();
1581                 }
1582                 $link = Linker::link( $nt, wfMessage( 'editsection' )->inLanguage( $lang )->text(),
1583                         $attribs,
1584                         array( 'action' => 'edit', 'section' => $section ),
1585                         array( 'noclasses', 'known' )
1586                 );
1587
1588                 # Add the brackets and the span and run the hook.
1589                 $result = '<span class="mw-editsection">'
1590                         . '<span class="mw-editsection-bracket">[</span>'
1591                         . $link
1592                         . '<span class="mw-editsection-bracket">]</span>'
1593                         . '</span>';
1594
1595                 wfRunHooks( 'DoEditSectionLink', array( $this, $nt, $section, $tooltip, &$result, $lang ) );
1596                 return $result;
1597         }
1598
1599         /**
1600          * Use PHP's magic __call handler to intercept legacy calls to the linker
1601          * for backwards compatibility.
1602          *
1603          * @param string $fname Name of called method
1604          * @param array $args Arguments to the method
1605          * @throws MWException
1606          * @return mixed
1607          */
1608         function __call( $fname, $args ) {
1609                 $realFunction = array( 'Linker', $fname );
1610                 if ( is_callable( $realFunction ) ) {
1611                         wfDeprecated( get_class( $this ) . '::' . $fname, '1.21' );
1612                         return call_user_func_array( $realFunction, $args );
1613                 } else {
1614                         $className = get_class( $this );
1615                         throw new MWException( "Call to undefined method $className::$fname" );
1616                 }
1617         }
1618
1619 }