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-cologneblue, skinname-monobook, skinname-modern, skinname-vector
  86                         $messages[] = "skinname-$skinKey";
  87                 }
  88                 return $messages;
  89         }
  90
  91         /**
  92          * Fetch the list of user-selectable skins in regards to $wgSkipSkins.
  93          * Useful for Special:Preferences and other places where you
  94          * only want to show skins users _can_ use.
  95          * @return array of strings
  96          */
  97         public static function getUsableSkins() {
  98                 global $wgSkipSkins;
  99
 100                 $allowedSkins = self::getSkinNames();
 101
 102                 foreach ( $wgSkipSkins as $skip ) {
 103                         unset( $allowedSkins[$skip] );
 104                 }
 105
 106                 return $allowedSkins;
 107         }
 108
 109         /**
 110          * Normalize a skin preference value to a form that can be loaded.
 111          * If a skin can't be found, it will fall back to the configured
 112          * default (or the old 'Classic' skin if that's broken).
 113          * @param string $key 'monobook', 'standard', etc.
 114          * @return string
 115          */
 116         static function normalizeKey( $key ) {
 117                 global $wgDefaultSkin;
 118
 119                 $skinNames = Skin::getSkinNames();
 120
 121                 if ( $key == '' || $key == 'default' ) {
 122                         // Don't return the default immediately;
 123                         // in a misconfiguration we need to fall back.
 124                         $key = $wgDefaultSkin;
 125                 }
 126
 127                 if ( isset( $skinNames[$key] ) ) {
 128                         return $key;
 129                 }
 130
 131                 // Older versions of the software used a numeric setting
 132                 // in the user preferences.
 133                 $fallback = array(
 134                         0 => $wgDefaultSkin,
 135                         2 => 'cologneblue'
 136                 );
 137
 138                 if ( isset( $fallback[$key] ) ) {
 139                         $key = $fallback[$key];
 140                 }
 141
 142                 if ( isset( $skinNames[$key] ) ) {
 143                         return $key;
 144                 } elseif ( isset( $skinNames[$wgDefaultSkin] ) ) {
 145                         return $wgDefaultSkin;
 146                 } else {
 147                         return 'vector';
 148                 }
 149         }
 150
 151         /**
 152          * Factory method for loading a skin of a given type
 153          * @param string $key 'monobook', 'standard', etc.
 154          * @return Skin
 155          */
 156         static function &newFromKey( $key ) {
 157                 global $wgStyleDirectory;
 158
 159                 $key = Skin::normalizeKey( $key );
 160
 161                 $skinNames = Skin::getSkinNames();
 162                 $skinName = $skinNames[$key];
 163                 $className = "Skin{$skinName}";
 164
 165                 # Grab the skin class and initialise it.
 166                 if ( !class_exists( $className ) ) {
 167
 168                         require_once "{$wgStyleDirectory}/{$skinName}.php";
 169
 170                         # Check if we got if not fallback to default skin
 171                         if ( !class_exists( $className ) ) {
 172                                 # DO NOT die if the class isn't found. This breaks maintenance
 173                                 # scripts and can cause a user account to be unrecoverable
 174                                 # except by SQL manipulation if a previously valid skin name
 175                                 # is no longer valid.
 176                                 wfDebug( "Skin class does not exist: $className\n" );
 177                                 $className = 'SkinVector';
 178                                 require_once "{$wgStyleDirectory}/Vector.php";
 179                         }
 180                 }
 181                 $skin = new $className( $key );
 182                 return $skin;
 183         }
 184
 185         /** @return string skin name */
 186         public function getSkinName() {
 187                 return $this->skinname;
 188         }
 189
 190         /**
 191          * @param $out OutputPage
 192          */
 193         function initPage( OutputPage $out ) {
 194                 wfProfileIn( __METHOD__ );
 195
 196                 $this->preloadExistence();
 197
 198                 wfProfileOut( __METHOD__ );
 199         }
 200
 201         /**
 202          * Defines the ResourceLoader modules that should be added to the skin
 203          * It is recommended that skins wishing to override call parent::getDefaultModules()
 204          * and substitute out any modules they wish to change by using a key to look them up
 205          * @return Array of modules with helper keys for easy overriding
 206          */
 207         public function getDefaultModules() {
 208                 global $wgIncludeLegacyJavaScript, $wgPreloadJavaScriptMwUtil, $wgUseAjax,
 209                         $wgAjaxWatch, $wgEnableAPI, $wgEnableWriteAPI;
 210
 211                 $out = $this->getOutput();
 212                 $user = $out->getUser();
 213                 $modules = array(
 214                         // modules that enhance the page content in some way
 215                         'content' => array(
 216                                 'mediawiki.page.ready',
 217                         ),
 218                         // modules that exist for legacy reasons
 219                         'legacy' => array(),
 220                         // modules relating to search functionality
 221                         'search' => array(),
 222                         // modules relating to functionality relating to watching an article
 223                         'watch' => array(),
 224                         // modules which relate to the current users preferences
 225                         'user' => array(),
 226                 );
 227                 if ( $wgIncludeLegacyJavaScript ) {
 228                         $modules['legacy'][] = 'mediawiki.legacy.wikibits';
 229                 }
 230
 231                 if ( $wgPreloadJavaScriptMwUtil ) {
 232                         $modules['legacy'][] = 'mediawiki.util';
 233                 }
 234
 235                 // Add various resources if required
 236                 if ( $wgUseAjax ) {
 237                         $modules['legacy'][] = 'mediawiki.legacy.ajax';
 238
 239                         if ( $wgEnableAPI ) {
 240                                 if ( $wgEnableWriteAPI && $wgAjaxWatch && $user->isLoggedIn()
 241                                         && $user->isAllowed( 'writeapi' )
 242                                 ) {
 243                                         $modules['watch'][] = 'mediawiki.page.watch.ajax';
 244                                 }
 245
 246                                 $modules['search'][] = 'mediawiki.searchSuggest';
 247                         }
 248                 }
 249
 250                 if ( $user->getBoolOption( 'editsectiononrightclick' ) ) {
 251                         $modules['user'][] = 'mediawiki.action.view.rightClickEdit';
 252                 }
 253
 254                 // Crazy edit-on-double-click stuff
 255                 if ( $out->isArticle() && $user->getOption( 'editondblclick' ) ) {
 256                         $modules['user'][] = 'mediawiki.action.view.dblClickEdit';
 257                 }
 258                 return $modules;
 259         }
 260
 261         /**
 262          * Preload the existence of three commonly-requested pages in a single query
 263          */
 264         function preloadExistence() {
 265                 $user = $this->getUser();
 266
 267                 // User/talk link
 268                 $titles = array( $user->getUserPage(), $user->getTalkPage() );
 269
 270                 // Other tab link
 271                 if ( $this->getTitle()->isSpecialPage() ) {
 272                         // nothing
 273                 } elseif ( $this->getTitle()->isTalkPage() ) {
 274                         $titles[] = $this->getTitle()->getSubjectPage();
 275                 } else {
 276                         $titles[] = $this->getTitle()->getTalkPage();
 277                 }
 278
 279                 $lb = new LinkBatch( $titles );
 280                 $lb->setCaller( __METHOD__ );
 281                 $lb->execute();
 282         }
 283
 284         /**
 285          * Get the current revision ID
 286          *
 287          * @return Integer
 288          */
 289         public function getRevisionId() {
 290                 return $this->getOutput()->getRevisionId();
 291         }
 292
 293         /**
 294          * Whether the revision displayed is the latest revision of the page
 295          *
 296          * @return Boolean
 297          */
 298         public function isRevisionCurrent() {
 299                 $revID = $this->getRevisionId();
 300                 return $revID == 0 || $revID == $this->getTitle()->getLatestRevID();
 301         }
 302
 303         /**
 304          * Set the "relevant" title
 305          * @see self::getRelevantTitle()
 306          * @param $t Title object to use
 307          */
 308         public function setRelevantTitle( $t ) {
 309                 $this->mRelevantTitle = $t;
 310         }
 311
 312         /**
 313          * Return the "relevant" title.
 314          * A "relevant" title is not necessarily the actual title of the page.
 315          * Special pages like Special:MovePage use set the page they are acting on
 316          * as their "relevant" title, this allows the skin system to display things
 317          * such as content tabs which belong to to that page instead of displaying
 318          * a basic special page tab which has almost no meaning.
 319          *
 320          * @return Title
 321          */
 322         public function getRelevantTitle() {
 323                 if ( isset( $this->mRelevantTitle ) ) {
 324                         return $this->mRelevantTitle;
 325                 }
 326                 return $this->getTitle();
 327         }
 328
 329         /**
 330          * Set the "relevant" user
 331          * @see self::getRelevantUser()
 332          * @param $u User object to use
 333          */
 334         public function setRelevantUser( $u ) {
 335                 $this->mRelevantUser = $u;
 336         }
 337
 338         /**
 339          * Return the "relevant" user.
 340          * A "relevant" user is similar to a relevant title. Special pages like
 341          * Special:Contributions mark the user which they are relevant to so that
 342          * things like the toolbox can display the information they usually are only
 343          * able to display on a user's userpage and talkpage.
 344          * @return User
 345          */
 346         public function getRelevantUser() {
 347                 if ( isset( $this->mRelevantUser ) ) {
 348                         return $this->mRelevantUser;
 349                 }
 350                 $title = $this->getRelevantTitle();
 351                 if ( $title->hasSubjectNamespace( NS_USER ) ) {
 352                         $rootUser = $title->getRootText();
 353                         if ( User::isIP( $rootUser ) ) {
 354                                 $this->mRelevantUser = User::newFromName( $rootUser, false );
 355                         } else {
 356                                 $user = User::newFromName( $rootUser, false );
 357                                 if ( $user && $user->isLoggedIn() ) {
 358                                         $this->mRelevantUser = $user;
 359                                 }
 360                         }
 361                         return $this->mRelevantUser;
 362                 }
 363                 return null;
 364         }
 365
 366         /**
 367          * Outputs the HTML generated by other functions.
 368          * @param $out OutputPage
 369          */
 370         abstract function outputPage( OutputPage $out = null );
 371
 372         /**
 373          * @param $data array
 374          * @return string
 375          */
 376         static function makeVariablesScript( $data ) {
 377                 if ( $data ) {
 378                         return Html::inlineScript(
 379                                 ResourceLoader::makeLoaderConditionalScript( ResourceLoader::makeConfigSetScript( $data ) )
 380                         );
 381                 } else {
 382                         return '';
 383                 }
 384         }
 385
 386         /**
 387          * Make a "<script>" tag containing global variables
 388          *
 389          * @deprecated in 1.19
 390          * @param $unused
 391          * @return string HTML fragment
 392          */
 393         public static function makeGlobalVariablesScript( $unused ) {
 394                 global $wgOut;
 395
 396                 wfDeprecated( __METHOD__, '1.19' );
 397
 398                 return self::makeVariablesScript( $wgOut->getJSVars() );
 399         }
 400
 401         /**
 402          * Get the query to generate a dynamic stylesheet
 403          *
 404          * @return array
 405          */
 406         public static function getDynamicStylesheetQuery() {
 407                 global $wgSquidMaxage;
 408
 409                 return array(
 410                                 'action' => 'raw',
 411                                 'maxage' => $wgSquidMaxage,
 412                                 'usemsgcache' => 'yes',
 413                                 'ctype' => 'text/css',
 414                                 'smaxage' => $wgSquidMaxage,
 415                         );
 416         }
 417
 418         /**
 419          * Add skin specific stylesheets
 420          * Calling this method with an $out of anything but the same OutputPage
 421          * inside ->getOutput() is deprecated. The $out arg is kept
 422          * for compatibility purposes with skins.
 423          * @param $out OutputPage
 424          * @todo delete
 425          */
 426         abstract function setupSkinUserCss( OutputPage $out );
 427
 428         /**
 429          * TODO: document
 430          * @param $title Title
 431          * @return String
 432          */
 433         function getPageClasses( $title ) {
 434                 $numeric = 'ns-' . $title->getNamespace();
 435
 436                 if ( $title->isSpecialPage() ) {
 437                         $type = 'ns-special';
 438                         // bug 23315: provide a class based on the canonical special page name without subpages
 439                         list( $canonicalName ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );
 440                         if ( $canonicalName ) {
 441                                 $type .= ' ' . Sanitizer::escapeClass( "mw-special-$canonicalName" );
 442                         } else {
 443                                 $type .= ' mw-invalidspecialpage';
 444                         }
 445                 } elseif ( $title->isTalkPage() ) {
 446                         $type = 'ns-talk';
 447                 } else {
 448                         $type = 'ns-subject';
 449                 }
 450
 451                 $name = Sanitizer::escapeClass( 'page-' . $title->getPrefixedText() );
 452
 453                 return "$numeric $type $name";
 454         }
 455
 456         /**
 457          * This will be called by OutputPage::headElement when it is creating the
 458          * "<body>" tag, skins can override it if they have a need to add in any
 459          * body attributes or classes of their own.
 460          * @param $out OutputPage
 461          * @param $bodyAttrs Array
 462          */
 463         function addToBodyAttributes( $out, &$bodyAttrs ) {
 464                 // does nothing by default
 465         }
 466
 467         /**
 468          * URL to the logo
 469          * @return String
 470          */
 471         function getLogo() {
 472                 global $wgLogo;
 473                 return $wgLogo;
 474         }
 475
 476         /**
 477          * @return string
 478          */
 479         function getCategoryLinks() {
 480                 global $wgUseCategoryBrowser;
 481
 482                 $out = $this->getOutput();
 483                 $allCats = $out->getCategoryLinks();
 484
 485                 if ( !count( $allCats ) ) {
 486                         return '';
 487                 }
 488
 489                 $embed = "<li>";
 490                 $pop = "</li>";
 491
 492                 $s = '';
 493                 $colon = $this->msg( 'colon-separator' )->escaped();
 494
 495                 if ( !empty( $allCats['normal'] ) ) {
 496                         $t = $embed . implode( "{$pop}{$embed}", $allCats['normal'] ) . $pop;
 497
 498                         $msg = $this->msg( 'pagecategories' )->numParams( count( $allCats['normal'] ) )->escaped();
 499                         $linkPage = wfMessage( 'pagecategorieslink' )->inContentLanguage()->text();
 500                         $s .= '<div id="mw-normal-catlinks" class="mw-normal-catlinks">' .
 501                                 Linker::link( Title::newFromText( $linkPage ), $msg )
 502                                 . $colon . '<ul>' . $t . '</ul>' . '</div>';
 503                 }
 504
 505                 # Hidden categories
 506                 if ( isset( $allCats['hidden'] ) ) {
 507                         if ( $this->getUser()->getBoolOption( 'showhiddencats' ) ) {
 508                                 $class = ' mw-hidden-cats-user-shown';
 509                         } elseif ( $this->getTitle()->getNamespace() == NS_CATEGORY ) {
 510                                 $class = ' mw-hidden-cats-ns-shown';
 511                         } else {
 512                                 $class = ' mw-hidden-cats-hidden';
 513                         }
 514
 515                         $s .= "<div id=\"mw-hidden-catlinks\" class=\"mw-hidden-catlinks$class\">" .
 516                                 $this->msg( 'hidden-categories' )->numParams( count( $allCats['hidden'] ) )->escaped() .
 517                                 $colon . '<ul>' . $embed . implode( "{$pop}{$embed}", $allCats['hidden'] ) . $pop . '</ul>' .
 518                                 '</div>';
 519                 }
 520
 521                 # optional 'dmoz-like' category browser. Will be shown under the list
 522                 # of categories an article belong to
 523                 if ( $wgUseCategoryBrowser ) {
 524                         $s .= '<br /><hr />';
 525
 526                         # get a big array of the parents tree
 527                         $parenttree = $this->getTitle()->getParentCategoryTree();
 528                         # Skin object passed by reference cause it can not be
 529                         # accessed under the method subfunction drawCategoryBrowser
 530                         $tempout = explode( "\n", $this->drawCategoryBrowser( $parenttree ) );
 531                         # Clean out bogus first entry and sort them
 532                         unset( $tempout[0] );
 533                         asort( $tempout );
 534                         # Output one per line
 535                         $s .= implode( "<br />\n", $tempout );
 536                 }
 537
 538                 return $s;
 539         }
 540
 541         /**
 542          * Render the array as a series of links.
 543          * @param array $tree categories tree returned by Title::getParentCategoryTree
 544          * @return String separated by &gt;, terminate with "\n"
 545          */
 546         function drawCategoryBrowser( $tree ) {
 547                 $return = '';
 548
 549                 foreach ( $tree as $element => $parent ) {
 550                         if ( empty( $parent ) ) {
 551                                 # element start a new list
 552                                 $return .= "\n";
 553                         } else {
 554                                 # grab the others elements
 555                                 $return .= $this->drawCategoryBrowser( $parent ) . ' &gt; ';
 556                         }
 557
 558                         # add our current element to the list
 559                         $eltitle = Title::newFromText( $element );
 560                         $return .= Linker::link( $eltitle, htmlspecialchars( $eltitle->getText() ) );
 561                 }
 562
 563                 return $return;
 564         }
 565
 566         /**
 567          * @return string
 568          */
 569         function getCategories() {
 570                 $out = $this->getOutput();
 571
 572                 $catlinks = $this->getCategoryLinks();
 573
 574                 $classes = 'catlinks';
 575
 576                 // Check what we're showing
 577                 $allCats = $out->getCategoryLinks();
 578                 $showHidden = $this->getUser()->getBoolOption( 'showhiddencats' ) ||
 579                                                 $this->getTitle()->getNamespace() == NS_CATEGORY;
 580
 581                 if ( empty( $allCats['normal'] ) && !( !empty( $allCats['hidden'] ) && $showHidden ) ) {
 582                         $classes .= ' catlinks-allhidden';
 583                 }
 584
 585                 return "<div id='catlinks' class='$classes'>{$catlinks}</div>";
 586         }
 587
 588         /**
 589          * This runs a hook to allow extensions placing their stuff after content
 590          * and article metadata (e.g. categories).
 591          * Note: This function has nothing to do with afterContent().
 592          *
 593          * This hook is placed here in order to allow using the same hook for all
 594          * skins, both the SkinTemplate based ones and the older ones, which directly
 595          * use this class to get their data.
 596          *
 597          * The output of this function gets processed in SkinTemplate::outputPage() for
 598          * the SkinTemplate based skins, all other skins should directly echo it.
 599          *
 600          * @return String, empty by default, if not changed by any hook function.
 601          */
 602         protected function afterContentHook() {
 603                 $data = '';
 604
 605                 if ( wfRunHooks( 'SkinAfterContent', array( &$data, $this ) ) ) {
 606                         // adding just some spaces shouldn't toggle the output
 607                         // of the whole <div/>, so we use trim() here
 608                         if ( trim( $data ) != '' ) {
 609                                 // Doing this here instead of in the skins to
 610                                 // ensure that the div has the same ID in all
 611                                 // skins
 612                                 $data = "<div id='mw-data-after-content'>\n" .
 613                                         "\t$data\n" .
 614                                         "</div>\n";
 615                         }
 616                 } else {
 617                         wfDebug( "Hook SkinAfterContent changed output processing.\n" );
 618                 }
 619
 620                 return $data;
 621         }
 622
 623         /**
 624          * Generate debug data HTML for displaying at the bottom of the main content
 625          * area.
 626          * @return String HTML containing debug data, if enabled (otherwise empty).
 627          */
 628         protected function generateDebugHTML() {
 629                 return MWDebug::getHTMLDebugLog();
 630         }
 631
 632         /**
 633          * This gets called shortly before the "</body>" tag.
 634          *
 635          * @return String HTML-wrapped JS code to be put before "</body>"
 636          */
 637         function bottomScripts() {
 638                 // TODO and the suckage continues. This function is really just a wrapper around
 639                 // OutputPage::getBottomScripts() which takes a Skin param. This should be cleaned
 640                 // up at some point
 641                 $bottomScriptText = $this->getOutput()->getBottomScripts();
 642                 wfRunHooks( 'SkinAfterBottomScripts', array( $this, &$bottomScriptText ) );
 643
 644                 return $bottomScriptText;
 645         }
 646
 647         /**
 648          * Text with the permalink to the source page,
 649          * usually shown on the footer of a printed page
 650          *
 651          * @return string HTML text with an URL
 652          */
 653         function printSource() {
 654                 $oldid = $this->getRevisionId();
 655                 if ( $oldid ) {
 656                         $url = htmlspecialchars( wfExpandIRI( $this->getTitle()->getCanonicalURL( 'oldid=' . $oldid ) ) );
 657                 } else {
 658                         // oldid not available for non existing pages
 659                         $url = htmlspecialchars( wfExpandIRI( $this->getTitle()->getCanonicalURL() ) );
 660                 }
 661                 return $this->msg( 'retrievedfrom', '<a href="' . $url . '">' . $url . '</a>' )->text();
 662         }
 663
 664         /**
 665          * @return String
 666          */
 667         function getUndeleteLink() {
 668                 $action = $this->getRequest()->getVal( 'action', 'view' );
 669
 670                 if ( $this->getUser()->isAllowed( 'deletedhistory' ) &&
 671                         ( $this->getTitle()->getArticleID() == 0 || $action == 'history' ) ) {
 672                         $n = $this->getTitle()->isDeleted();
 673
 674                         if ( $n ) {
 675                                 if ( $this->getUser()->isAllowed( 'undelete' ) ) {
 676                                         $msg = 'thisisdeleted';
 677                                 } else {
 678                                         $msg = 'viewdeleted';
 679                                 }
 680
 681                                 return $this->msg( $msg )->rawParams(
 682                                         Linker::linkKnown(
 683                                                 SpecialPage::getTitleFor( 'Undelete', $this->getTitle()->getPrefixedDBkey() ),
 684                                                 $this->msg( 'restorelink' )->numParams( $n )->escaped() )
 685                                         )->text();
 686                         }
 687                 }
 688
 689                 return '';
 690         }
 691
 692         /**
 693          * @return string
 694          */
 695         function subPageSubtitle() {
 696                 global $wgLang;
 697                 $out = $this->getOutput();
 698                 $subpages = '';
 699
 700                 if ( !wfRunHooks( 'SkinSubPageSubtitle', array( &$subpages, $this, $out ) ) ) {
 701                         return $subpages;
 702                 }
 703
 704                 if ( $out->isArticle() && MWNamespace::hasSubpages( $out->getTitle()->getNamespace() ) ) {
 705                         $ptext = $this->getTitle()->getPrefixedText();
 706                         if ( preg_match( '/\//', $ptext ) ) {
 707                                 $links = explode( '/', $ptext );
 708                                 array_pop( $links );
 709                                 $c = 0;
 710                                 $growinglink = '';
 711                                 $display = '';
 712
 713                                 foreach ( $links as $link ) {
 714                                         $growinglink .= $link;
 715                                         $display .= $link;
 716                                         $linkObj = Title::newFromText( $growinglink );
 717
 718                                         if ( is_object( $linkObj ) && $linkObj->isKnown() ) {
 719                                                 $getlink = Linker::linkKnown(
 720                                                         $linkObj,
 721                                                         htmlspecialchars( $display )
 722                                                 );
 723
 724                                                 $c++;
 725
 726                                                 if ( $c > 1 ) {
 727                                                         $subpages .= $wgLang->getDirMarkEntity() . $this->msg( 'pipe-separator' )->escaped();
 728                                                 } else {
 729                                                         $subpages .= '&lt; ';
 730                                                 }
 731
 732                                                 $subpages .= $getlink;
 733                                                 $display = '';
 734                                         } else {
 735                                                 $display .= '/';
 736                                         }
 737                                         $growinglink .= '/';
 738                                 }
 739                         }
 740                 }
 741
 742                 return $subpages;
 743         }
 744
 745         /**
 746          * Returns true if the IP should be shown in the header
 747          * @return Bool
 748          */
 749         function showIPinHeader() {
 750                 global $wgShowIPinHeader;
 751                 return $wgShowIPinHeader && session_id() != '';
 752         }
 753
 754         /**
 755          * @return String
 756          */
 757         function getSearchLink() {
 758                 $searchPage = SpecialPage::getTitleFor( 'Search' );
 759                 return $searchPage->getLocalURL();
 760         }
 761
 762         /**
 763          * @return string
 764          */
 765         function escapeSearchLink() {
 766                 return htmlspecialchars( $this->getSearchLink() );
 767         }
 768
 769         /**
 770          * @param $type string
 771          * @return string
 772          */
 773         function getCopyright( $type = 'detect' ) {
 774                 global $wgRightsPage, $wgRightsUrl, $wgRightsText, $wgContLang;
 775
 776                 if ( $type == 'detect' ) {
 777                         if ( !$this->isRevisionCurrent() && !$this->msg( 'history_copyright' )->inContentLanguage()->isDisabled() ) {
 778                                 $type = 'history';
 779                         } else {
 780                                 $type = 'normal';
 781                         }
 782                 }
 783
 784                 if ( $type == 'history' ) {
 785                         $msg = 'history_copyright';
 786                 } else {
 787                         $msg = 'copyright';
 788                 }
 789
 790                 if ( $wgRightsPage ) {
 791                         $title = Title::newFromText( $wgRightsPage );
 792                         $link = Linker::linkKnown( $title, $wgRightsText );
 793                 } elseif ( $wgRightsUrl ) {
 794                         $link = Linker::makeExternalLink( $wgRightsUrl, $wgRightsText );
 795                 } elseif ( $wgRightsText ) {
 796                         $link = $wgRightsText;
 797                 } else {
 798                         # Give up now
 799                         return '';
 800                 }
 801
 802                 // Allow for site and per-namespace customization of copyright notice.
 803                 $forContent = true;
 804
 805                 wfRunHooks( 'SkinCopyrightFooter', array( $this->getTitle(), $type, &$msg, &$link, &$forContent ) );
 806
 807                 $msgObj = $this->msg( $msg )->rawParams( $link );
 808                 if ( $forContent ) {
 809                         $msg = $msgObj->inContentLanguage()->text();
 810                         if ( $this->getLanguage()->getCode() !== $wgContLang->getCode() ) {
 811                                 $msg = Html::rawElement( 'span', array( 'lang' => $wgContLang->getHtmlCode(), 'dir' => $wgContLang->getDir() ), $msg );
 812                         }
 813                         return $msg;
 814                 } else {
 815                         return $msgObj->text();
 816                 }
 817         }
 818
 819         /**
 820          * @return null|string
 821          */
 822         function getCopyrightIcon() {
 823                 global $wgRightsUrl, $wgRightsText, $wgRightsIcon, $wgCopyrightIcon;
 824
 825                 $out = '';
 826
 827                 if ( isset( $wgCopyrightIcon ) && $wgCopyrightIcon ) {
 828                         $out = $wgCopyrightIcon;
 829                 } elseif ( $wgRightsIcon ) {
 830                         $icon = htmlspecialchars( $wgRightsIcon );
 831
 832                         if ( $wgRightsUrl ) {
 833                                 $url = htmlspecialchars( $wgRightsUrl );
 834                                 $out .= '<a href="' . $url . '">';
 835                         }
 836
 837                         $text = htmlspecialchars( $wgRightsText );
 838                         $out .= "<img src=\"$icon\" alt=\"$text\" width=\"88\" height=\"31\" />";
 839
 840                         if ( $wgRightsUrl ) {
 841                                 $out .= '</a>';
 842                         }
 843                 }
 844
 845                 return $out;
 846         }
 847
 848         /**
 849          * Gets the powered by MediaWiki icon.
 850          * @return string
 851          */
 852         function getPoweredBy() {
 853                 global $wgStylePath;
 854
 855                 $url = htmlspecialchars( "$wgStylePath/common/images/poweredby_mediawiki_88x31.png" );
 856                 $text = '<a href="//www.mediawiki.org/"><img src="' . $url . '" height="31" width="88" alt="Powered by MediaWiki" /></a>';
 857                 wfRunHooks( 'SkinGetPoweredBy', array( &$text, $this ) );
 858                 return $text;
 859         }
 860
 861         /**
 862          * Get the timestamp of the latest revision, formatted in user language
 863          *
 864          * @return String
 865          */
 866         protected function lastModified() {
 867                 $timestamp = $this->getOutput()->getRevisionTimestamp();
 868
 869                 # No cached timestamp, load it from the database
 870                 if ( $timestamp === null ) {
 871                         $timestamp = Revision::getTimestampFromId( $this->getTitle(), $this->getRevisionId() );
 872                 }
 873
 874                 if ( $timestamp ) {
 875                         $d = $this->getLanguage()->userDate( $timestamp, $this->getUser() );
 876                         $t = $this->getLanguage()->userTime( $timestamp, $this->getUser() );
 877                         $s = ' ' . $this->msg( 'lastmodifiedat', $d, $t )->text();
 878                 } else {
 879                         $s = '';
 880                 }
 881
 882                 if ( wfGetLB()->getLaggedSlaveMode() ) {
 883                         $s .= ' <strong>' . $this->msg( 'laggedslavemode' )->text() . '</strong>';
 884                 }
 885
 886                 return $s;
 887         }
 888
 889         /**
 890          * @param $align string
 891          * @return string
 892          */
 893         function logoText( $align = '' ) {
 894                 if ( $align != '' ) {
 895                         $a = " style='float: {$align};'";
 896                 } else {
 897                         $a = '';
 898                 }
 899
 900                 $mp = $this->msg( 'mainpage' )->escaped();
 901                 $mptitle = Title::newMainPage();
 902                 $url = ( is_object( $mptitle ) ? htmlspecialchars( $mptitle->getLocalURL() ) : '' );
 903
 904                 $logourl = $this->getLogo();
 905                 $s = "<a href='{$url}'><img{$a} src='{$logourl}' alt='[{$mp}]' /></a>";
 906
 907                 return $s;
 908         }
 909
 910         /**
 911          * Renders a $wgFooterIcons icon according to the method's arguments
 912          * @param array $icon The icon to build the html for, see $wgFooterIcons for the format of this array
 913          * @param bool|String $withImage Whether to use the icon's image or output a text-only footericon
 914          * @return String HTML
 915          */
 916         function makeFooterIcon( $icon, $withImage = 'withImage' ) {
 917                 if ( is_string( $icon ) ) {
 918                         $html = $icon;
 919                 } else { // Assuming array
 920                         $url = isset( $icon["url"] ) ? $icon["url"] : null;
 921                         unset( $icon["url"] );
 922                         if ( isset( $icon["src"] ) && $withImage === 'withImage' ) {
 923                                 $html = Html::element( 'img', $icon ); // do this the lazy way, just pass icon data as an attribute array
 924                         } else {
 925                                 $html = htmlspecialchars( $icon["alt"] );
 926                         }
 927                         if ( $url ) {
 928                                 $html = Html::rawElement( 'a', array( "href" => $url ), $html );
 929                         }
 930                 }
 931                 return $html;
 932         }
 933
 934         /**
 935          * Gets the link to the wiki's main page.
 936          * @return string
 937          */
 938         function mainPageLink() {
 939                 $s = Linker::linkKnown(
 940                         Title::newMainPage(),
 941                         $this->msg( 'mainpage' )->escaped()
 942                 );
 943
 944                 return $s;
 945         }
 946
 947         /**
 948          * @param $desc
 949          * @param $page
 950          * @return string
 951          */
 952         public function footerLink( $desc, $page ) {
 953                 // if the link description has been set to "-" in the default language,
 954                 if ( $this->msg( $desc )->inContentLanguage()->isDisabled() ) {
 955                         // then it is disabled, for all languages.
 956                         return '';
 957                 } else {
 958                         // Otherwise, we display the link for the user, described in their
 959                         // language (which may or may not be the same as the default language),
 960                         // but we make the link target be the one site-wide page.
 961                         $title = Title::newFromText( $this->msg( $page )->inContentLanguage()->text() );
 962
 963                         return Linker::linkKnown(
 964                                 $title,
 965                                 $this->msg( $desc )->escaped()
 966                         );
 967                 }
 968         }
 969
 970         /**
 971          * Gets the link to the wiki's privacy policy page.
 972          * @return String HTML
 973          */
 974         function privacyLink() {
 975                 return $this->footerLink( 'privacy', 'privacypage' );
 976         }
 977
 978         /**
 979          * Gets the link to the wiki's about page.
 980          * @return String HTML
 981          */
 982         function aboutLink() {
 983                 return $this->footerLink( 'aboutsite', 'aboutpage' );
 984         }
 985
 986         /**
 987          * Gets the link to the wiki's general disclaimers page.
 988          * @return String HTML
 989          */
 990         function disclaimerLink() {
 991                 return $this->footerLink( 'disclaimers', 'disclaimerpage' );
 992         }
 993
 994         /**
 995          * Return URL options for the 'edit page' link.
 996          * This may include an 'oldid' specifier, if the current page view is such.
 997          *
 998          * @return array
 999          * @private
1000          */
1001         function editUrlOptions() {
1002                 $options = array( 'action' => 'edit' );
1003
1004                 if ( !$this->isRevisionCurrent() ) {
1005                         $options['oldid'] = intval( $this->getRevisionId() );
1006                 }
1007
1008                 return $options;
1009         }
1010
1011         /**
1012          * @param $id User|int
1013          * @return bool
1014          */
1015         function showEmailUser( $id ) {
1016                 if ( $id instanceof User ) {
1017                         $targetUser = $id;
1018                 } else {
1019                         $targetUser = User::newFromId( $id );
1020                 }
1021                 return $this->getUser()->canSendEmail() && # the sending user must have a confirmed email address
1022                         $targetUser->canReceiveEmail(); # the target user must have a confirmed email address and allow emails from users
1023         }
1024
1025         /**
1026          * Return a fully resolved style path url to images or styles stored in the common folder.
1027          * This method returns a url resolved using the configured skin style path
1028          * and includes the style version inside of the url.
1029          * @param string $name The name or path of a skin resource file
1030          * @return String The fully resolved style path url including styleversion
1031          */
1032         function getCommonStylePath( $name ) {
1033                 global $wgStylePath, $wgStyleVersion;
1034                 return "$wgStylePath/common/$name?$wgStyleVersion";
1035         }
1036
1037         /**
1038          * Return a fully resolved style path url to images or styles stored in the current skins's folder.
1039          * This method returns a url resolved using the configured skin style path
1040          * and includes the style version inside of the url.
1041          * @param string $name The name or path of a skin resource file
1042          * @return String The fully resolved style path url including styleversion
1043          */
1044         function getSkinStylePath( $name ) {
1045                 global $wgStylePath, $wgStyleVersion;
1046                 return "$wgStylePath/{$this->stylename}/$name?$wgStyleVersion";
1047         }
1048
1049         /* these are used extensively in SkinTemplate, but also some other places */
1050
1051         /**
1052          * @param $urlaction string
1053          * @return String
1054          */
1055         static function makeMainPageUrl( $urlaction = '' ) {
1056                 $title = Title::newMainPage();
1057                 self::checkTitle( $title, '' );
1058
1059                 return $title->getLocalURL( $urlaction );
1060         }
1061
1062         /**
1063          * Make a URL for a Special Page using the given query and protocol.
1064          *
1065          * If $proto is set to null, make a local URL. Otherwise, make a full
1066          * URL with the protocol specified.
1067          *
1068          * @param string $name Name of the Special page
1069          * @param string $urlaction Query to append
1070          * @param $proto Protocol to use or null for a local URL
1071          * @return String
1072          */
1073         static function makeSpecialUrl( $name, $urlaction = '', $proto = null ) {
1074                 $title = SpecialPage::getSafeTitleFor( $name );
1075                 if ( is_null( $proto ) ) {
1076                         return $title->getLocalURL( $urlaction );
1077                 } else {
1078                         return $title->getFullURL( $urlaction, false, $proto );
1079                 }
1080         }
1081
1082         /**
1083          * @param $name string
1084          * @param $subpage string
1085          * @param $urlaction string
1086          * @return String
1087          */
1088         static function makeSpecialUrlSubpage( $name, $subpage, $urlaction = '' ) {
1089                 $title = SpecialPage::getSafeTitleFor( $name, $subpage );
1090                 return $title->getLocalURL( $urlaction );
1091         }
1092
1093         /**
1094          * @param $name string
1095          * @param $urlaction string
1096          * @return String
1097          */
1098         static function makeI18nUrl( $name, $urlaction = '' ) {
1099                 $title = Title::newFromText( wfMessage( $name )->inContentLanguage()->text() );
1100                 self::checkTitle( $title, $name );
1101                 return $title->getLocalURL( $urlaction );
1102         }
1103
1104         /**
1105          * @param $name string
1106          * @param $urlaction string
1107          * @return String
1108          */
1109         static function makeUrl( $name, $urlaction = '' ) {
1110                 $title = Title::newFromText( $name );
1111                 self::checkTitle( $title, $name );
1112
1113                 return $title->getLocalURL( $urlaction );
1114         }
1115
1116         /**
1117          * If url string starts with http, consider as external URL, else
1118          * internal
1119          * @param $name String
1120          * @return String URL
1121          */
1122         static function makeInternalOrExternalUrl( $name ) {
1123                 if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $name ) ) {
1124                         return $name;
1125                 } else {
1126                         return self::makeUrl( $name );
1127                 }
1128         }
1129
1130         /**
1131          * this can be passed the NS number as defined in Language.php
1132          * @param $name
1133          * @param $urlaction string
1134          * @param $namespace int
1135          * @return String
1136          */
1137         static function makeNSUrl( $name, $urlaction = '', $namespace = NS_MAIN ) {
1138                 $title = Title::makeTitleSafe( $namespace, $name );
1139                 self::checkTitle( $title, $name );
1140
1141                 return $title->getLocalURL( $urlaction );
1142         }
1143
1144         /**
1145          * these return an array with the 'href' and boolean 'exists'
1146          * @param $name
1147          * @param $urlaction string
1148          * @return array
1149          */
1150         static function makeUrlDetails( $name, $urlaction = '' ) {
1151                 $title = Title::newFromText( $name );
1152                 self::checkTitle( $title, $name );
1153
1154                 return array(
1155                         'href' => $title->getLocalURL( $urlaction ),
1156                         'exists' => $title->getArticleID() != 0,
1157                 );
1158         }
1159
1160         /**
1161          * Make URL details where the article exists (or at least it's convenient to think so)
1162          * @param string $name Article name
1163          * @param $urlaction String
1164          * @return Array
1165          */
1166         static function makeKnownUrlDetails( $name, $urlaction = '' ) {
1167                 $title = Title::newFromText( $name );
1168                 self::checkTitle( $title, $name );
1169
1170                 return array(
1171                         'href' => $title->getLocalURL( $urlaction ),
1172                         'exists' => true
1173                 );
1174         }
1175
1176         /**
1177          * make sure we have some title to operate on
1178          *
1179          * @param $title Title
1180          * @param $name string
1181          */
1182         static function checkTitle( &$title, $name ) {
1183                 if ( !is_object( $title ) ) {
1184                         $title = Title::newFromText( $name );
1185                         if ( !is_object( $title ) ) {
1186                                 $title = Title::newFromText( '--error: link target missing--' );
1187                         }
1188                 }
1189         }
1190
1191         /**
1192          * Build an array that represents the sidebar(s), the navigation bar among them.
1193          *
1194          * BaseTemplate::getSidebar can be used to simplify the format and id generation in new skins.
1195          *
1196          * The format of the returned array is array( heading => content, ... ), where:
1197          * - heading is the heading of a navigation portlet. It is either:
1198          *   - magic string to be handled by the skins ('SEARCH' / 'LANGUAGES' / 'TOOLBOX' / ...)
1199          *   - a message name (e.g. 'navigation'), the message should be HTML-escaped by the skin
1200          *   - plain text, which should be HTML-escaped by the skin
1201          * - content is the contents of the portlet. It is either:
1202          *   - HTML text (<ul><li>...</li>...</ul>)
1203          *   - array of link data in a format accepted by BaseTemplate::makeListItem()
1204          *   - (for a magic string as a key, any value)
1205          *
1206          * Note that extensions can control the sidebar contents using the SkinBuildSidebar hook
1207          * and can technically insert anything in here; skin creators are expected to handle
1208          * values described above.
1209          *
1210          * @return array
1211          */
1212         function buildSidebar() {
1213                 global $wgMemc, $wgEnableSidebarCache, $wgSidebarCacheExpiry;
1214                 wfProfileIn( __METHOD__ );
1215
1216                 $key = wfMemcKey( 'sidebar', $this->getLanguage()->getCode() );
1217
1218                 if ( $wgEnableSidebarCache ) {
1219                         $cachedsidebar = $wgMemc->get( $key );
1220                         if ( $cachedsidebar ) {
1221                                 wfProfileOut( __METHOD__ );
1222                                 return $cachedsidebar;
1223                         }
1224                 }
1225
1226                 $bar = array();
1227                 $this->addToSidebar( $bar, 'sidebar' );
1228
1229                 wfRunHooks( 'SkinBuildSidebar', array( $this, &$bar ) );
1230                 if ( $wgEnableSidebarCache ) {
1231                         $wgMemc->set( $key, $bar, $wgSidebarCacheExpiry );
1232                 }
1233
1234                 wfProfileOut( __METHOD__ );
1235                 return $bar;
1236         }
1237         /**
1238          * Add content from a sidebar system message
1239          * Currently only used for MediaWiki:Sidebar (but may be used by Extensions)
1240          *
1241          * This is just a wrapper around addToSidebarPlain() for backwards compatibility
1242          *
1243          * @param $bar array
1244          * @param $message String
1245          */
1246         function addToSidebar( &$bar, $message ) {
1247                 $this->addToSidebarPlain( $bar, wfMessage( $message )->inContentLanguage()->plain() );
1248         }
1249
1250         /**
1251          * Add content from plain text
1252          * @since 1.17
1253          * @param $bar array
1254          * @param $text string
1255          * @return Array
1256          */
1257         function addToSidebarPlain( &$bar, $text ) {
1258                 $lines = explode( "\n", $text );
1259
1260                 $heading = '';
1261
1262                 foreach ( $lines as $line ) {
1263                         if ( strpos( $line, '*' ) !== 0 ) {
1264                                 continue;
1265                         }
1266                         $line = rtrim( $line, "\r" ); // for Windows compat
1267
1268                         if ( strpos( $line, '**' ) !== 0 ) {
1269                                 $heading = trim( $line, '* ' );
1270                                 if ( !array_key_exists( $heading, $bar ) ) {
1271                                         $bar[$heading] = array();
1272                                 }
1273                         } else {
1274                                 $line = trim( $line, '* ' );
1275
1276                                 if ( strpos( $line, '|' ) !== false ) { // sanity check
1277                                         $line = MessageCache::singleton()->transform( $line, false, null, $this->getTitle() );
1278                                         $line = array_map( 'trim', explode( '|', $line, 2 ) );
1279                                         if ( count( $line ) !== 2 ) {
1280                                                 // Second sanity check, could be hit by people doing
1281                                                 // funky stuff with parserfuncs... (bug 33321)
1282                                                 continue;
1283                                         }
1284
1285                                         $extraAttribs = array();
1286
1287                                         $msgLink = $this->msg( $line[0] )->inContentLanguage();
1288                                         if ( $msgLink->exists() ) {
1289                                                 $link = $msgLink->text();
1290                                                 if ( $link == '-' ) {
1291                                                         continue;
1292                                                 }
1293                                         } else {
1294                                                 $link = $line[0];
1295                                         }
1296                                         $msgText = $this->msg( $line[1] );
1297                                         if ( $msgText->exists() ) {
1298                                                 $text = $msgText->text();
1299                                         } else {
1300                                                 $text = $line[1];
1301                                         }
1302
1303                                         if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $link ) ) {
1304                                                 $href = $link;
1305
1306                                                 // Parser::getExternalLinkAttribs won't work here because of the Namespace things
1307                                                 global $wgNoFollowLinks, $wgNoFollowDomainExceptions;
1308                                                 if ( $wgNoFollowLinks && !wfMatchesDomainList( $href, $wgNoFollowDomainExceptions ) ) {
1309                                                         $extraAttribs['rel'] = 'nofollow';
1310                                                 }
1311
1312                                                 global $wgExternalLinkTarget;
1313                                                 if ( $wgExternalLinkTarget ) {
1314                                                         $extraAttribs['target'] = $wgExternalLinkTarget;
1315                                                 }
1316                                         } else {
1317                                                 $title = Title::newFromText( $link );
1318
1319                                                 if ( $title ) {
1320                                                         $title = $title->fixSpecialName();
1321                                                         $href = $title->getLinkURL();
1322                                                 } else {
1323                                                         $href = 'INVALID-TITLE';
1324                                                 }
1325                                         }
1326
1327                                         $bar[$heading][] = array_merge( array(
1328                                                 'text' => $text,
1329                                                 'href' => $href,
1330                                                 'id' => 'n-' . Sanitizer::escapeId( strtr( $line[1], ' ', '-' ), 'noninitial' ),
1331                                                 'active' => false
1332                                         ), $extraAttribs );
1333                                 } else {
1334                                         continue;
1335                                 }
1336                         }
1337                 }
1338
1339                 return $bar;
1340         }
1341
1342         /**
1343          * This function previously controlled whether the 'mediawiki.legacy.wikiprintable' module
1344          * should be loaded by OutputPage. That module no longer exists and the return value of this
1345          * method is ignored.
1346          *
1347          * If your skin doesn't provide its own print styles, the 'mediawiki.legacy.commonPrint' module
1348          * can be used instead (SkinTemplate-based skins do it automatically).
1349          *
1350          * @deprecated since 1.22
1351          * @return bool
1352          */
1353         public function commonPrintStylesheet() {
1354                 wfDeprecated( __METHOD__, '1.22' );
1355                 return false;
1356         }
1357
1358         /**
1359          * Gets new talk page messages for the current user and returns an
1360          * appropriate alert message (or an empty string if there are no messages)
1361          * @return String
1362          */
1363         function getNewtalks() {
1364
1365                 $newMessagesAlert = '';
1366                 $user = $this->getUser();
1367                 $newtalks = $user->getNewMessageLinks();
1368                 $out = $this->getOutput();
1369
1370                 // Allow extensions to disable or modify the new messages alert
1371                 if ( !wfRunHooks( 'GetNewMessagesAlert', array( &$newMessagesAlert, $newtalks, $user, $out ) ) ) {
1372                         return '';
1373                 }
1374                 if ( $newMessagesAlert ) {
1375                         return $newMessagesAlert;
1376                 }
1377
1378                 if ( count( $newtalks ) == 1 && $newtalks[0]['wiki'] === wfWikiID() ) {
1379                         $uTalkTitle = $user->getTalkPage();
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 ? 999 : 1;
1396                         // 999 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                 } elseif ( count( $newtalks ) ) {
1433                         $sep = $this->msg( 'newtalkseparator' )->escaped();
1434                         $msgs = array();
1435
1436                         foreach ( $newtalks as $newtalk ) {
1437                                 $msgs[] = Xml::element(
1438                                         'a',
1439                                         array( 'href' => $newtalk['link'] ), $newtalk['wiki']
1440                                 );
1441                         }
1442                         $parts = implode( $sep, $msgs );
1443                         $newMessagesAlert = $this->msg( 'youhavenewmessagesmulti' )->rawParams( $parts )->escaped();
1444                         $out->setSquidMaxage( 0 );
1445                 }
1446
1447                 return $newMessagesAlert;
1448         }
1449
1450         /**
1451          * Get a cached notice
1452          *
1453          * @param string $name message name, or 'default' for $wgSiteNotice
1454          * @return String: HTML fragment
1455          */
1456         private function getCachedNotice( $name ) {
1457                 global $wgRenderHashAppend, $parserMemc, $wgContLang;
1458
1459                 wfProfileIn( __METHOD__ );
1460
1461                 $needParse = false;
1462
1463                 if ( $name === 'default' ) {
1464                         // special case
1465                         global $wgSiteNotice;
1466                         $notice = $wgSiteNotice;
1467                         if ( empty( $notice ) ) {
1468                                 wfProfileOut( __METHOD__ );
1469                                 return false;
1470                         }
1471                 } else {
1472                         $msg = $this->msg( $name )->inContentLanguage();
1473                         if ( $msg->isDisabled() ) {
1474                                 wfProfileOut( __METHOD__ );
1475                                 return false;
1476                         }
1477                         $notice = $msg->plain();
1478                 }
1479
1480                 // Use the extra hash appender to let eg SSL variants separately cache.
1481                 $key = wfMemcKey( $name . $wgRenderHashAppend );
1482                 $cachedNotice = $parserMemc->get( $key );
1483                 if ( is_array( $cachedNotice ) ) {
1484                         if ( md5( $notice ) == $cachedNotice['hash'] ) {
1485                                 $notice = $cachedNotice['html'];
1486                         } else {
1487                                 $needParse = true;
1488                         }
1489                 } else {
1490                         $needParse = true;
1491                 }
1492
1493                 if ( $needParse ) {
1494                         $parsed = $this->getOutput()->parse( $notice );
1495                         $parserMemc->set( $key, array( 'html' => $parsed, 'hash' => md5( $notice ) ), 600 );
1496                         $notice = $parsed;
1497                 }
1498
1499                 $notice = Html::rawElement( 'div', array( 'id' => 'localNotice',
1500                         'lang' => $wgContLang->getHtmlCode(), 'dir' => $wgContLang->getDir() ), $notice );
1501                 wfProfileOut( __METHOD__ );
1502                 return $notice;
1503         }
1504
1505         /**
1506          * Get a notice based on page's namespace
1507          *
1508          * @return String: HTML fragment
1509          */
1510         function getNamespaceNotice() {
1511                 wfProfileIn( __METHOD__ );
1512
1513                 $key = 'namespacenotice-' . $this->getTitle()->getNsText();
1514                 $namespaceNotice = $this->getCachedNotice( $key );
1515                 if ( $namespaceNotice && substr( $namespaceNotice, 0, 7 ) != '<p>&lt;' ) {
1516                         $namespaceNotice = '<div id="namespacebanner">' . $namespaceNotice . '</div>';
1517                 } else {
1518                         $namespaceNotice = '';
1519                 }
1520
1521                 wfProfileOut( __METHOD__ );
1522                 return $namespaceNotice;
1523         }
1524
1525         /**
1526          * Get the site notice
1527          *
1528          * @return String: HTML fragment
1529          */
1530         function getSiteNotice() {
1531                 wfProfileIn( __METHOD__ );
1532                 $siteNotice = '';
1533
1534                 if ( wfRunHooks( 'SiteNoticeBefore', array( &$siteNotice, $this ) ) ) {
1535                         if ( is_object( $this->getUser() ) && $this->getUser()->isLoggedIn() ) {
1536                                 $siteNotice = $this->getCachedNotice( 'sitenotice' );
1537                         } else {
1538                                 $anonNotice = $this->getCachedNotice( 'anonnotice' );
1539                                 if ( !$anonNotice ) {
1540                                         $siteNotice = $this->getCachedNotice( 'sitenotice' );
1541                                 } else {
1542                                         $siteNotice = $anonNotice;
1543                                 }
1544                         }
1545                         if ( !$siteNotice ) {
1546                                 $siteNotice = $this->getCachedNotice( 'default' );
1547                         }
1548                 }
1549
1550                 wfRunHooks( 'SiteNoticeAfter', array( &$siteNotice, $this ) );
1551                 wfProfileOut( __METHOD__ );
1552                 return $siteNotice;
1553         }
1554
1555         /**
1556          * Create a section edit link.  This supersedes editSectionLink() and
1557          * editSectionLinkForOther().
1558          *
1559          * @param $nt      Title  The title being linked to (may not be the same as
1560          *   the current page, if the section is included from a template)
1561          * @param string $section The designation of the section being pointed to,
1562          *   to be included in the link, like "&section=$section"
1563          * @param string $tooltip The tooltip to use for the link: will be escaped
1564          *   and wrapped in the 'editsectionhint' message
1565          * @param $lang    string Language code
1566          * @return         string HTML to use for edit link
1567          */
1568         public function doEditSectionLink( Title $nt, $section, $tooltip = null, $lang = false ) {
1569                 // HTML generated here should probably have userlangattributes
1570                 // added to it for LTR text on RTL pages
1571
1572                 $lang = wfGetLangObj( $lang );
1573
1574                 $attribs = array();
1575                 if ( !is_null( $tooltip ) ) {
1576                         # Bug 25462: undo double-escaping.
1577                         $tooltip = Sanitizer::decodeCharReferences( $tooltip );
1578                         $attribs['title'] = wfMessage( 'editsectionhint' )->rawParams( $tooltip )
1579                                 ->inLanguage( $lang )->text();
1580                 }
1581                 $link = Linker::link( $nt, wfMessage( 'editsection' )->inLanguage( $lang )->text(),
1582                         $attribs,
1583                         array( 'action' => 'edit', 'section' => $section ),
1584                         array( 'noclasses', 'known' )
1585                 );
1586
1587                 # Add the brackets and the span and run the hook.
1588                 $result = '<span class="mw-editsection">'
1589                         . '<span class="mw-editsection-bracket">[</span>'
1590                         . $link
1591                         . '<span class="mw-editsection-bracket">]</span>'
1592                         . '</span>';
1593
1594                 wfRunHooks( 'DoEditSectionLink', array( $this, $nt, $section, $tooltip, &$result, $lang ) );
1595                 return $result;
1596         }
1597
1598         /**
1599          * Use PHP's magic __call handler to intercept legacy calls to the linker
1600          * for backwards compatibility.
1601          *
1602          * @param string $fname Name of called method
1603          * @param array $args Arguments to the method
1604          * @throws MWException
1605          * @return mixed
1606          */
1607         function __call( $fname, $args ) {
1608                 $realFunction = array( 'Linker', $fname );
1609                 if ( is_callable( $realFunction ) ) {
1610                         wfDeprecated( get_class( $this ) . '::' . $fname, '1.21' );
1611                         return call_user_func_array( $realFunction, $args );
1612                 } else {
1613                         $className = get_class( $this );
1614                         throw new MWException( "Call to undefined method $className::$fname" );
1615                 }
1616         }
1617
1618 }