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  *
  30  * See docs/skin.txt for more information.
  31  *
  32  * @ingroup Skins
  33  */
  34 abstract class Skin extends ContextSource {
  35         protected $skinname = null;
  36         protected $mRelevantTitle = null;
  37         protected $mRelevantUser = null;
  38
  39         /**
  40          * Fetch the set of available skins.
  41          * @return array Associative array of strings
  42          */
  43         static function getSkinNames() {
  44                 global $wgValidSkinNames;
  45                 static $skinsInitialised = false;
  46
  47                 if ( !$skinsInitialised || !count( $wgValidSkinNames ) ) {
  48                         # Get a list of available skins
  49                         # Build using the regular expression '^(.*).php$'
  50                         # Array keys are all lower case, array value keep the case used by filename
  51                         #
  52                         wfProfileIn( __METHOD__ . '-init' );
  53
  54                         global $wgStyleDirectory;
  55
  56                         $skinDir = dir( $wgStyleDirectory );
  57
  58                         if ( $skinDir !== false && $skinDir !== null ) {
  59                                 # while code from www.php.net
  60                                 while ( false !== ( $file = $skinDir->read() ) ) {
  61                                         // Skip non-PHP files, hidden files, and '.dep' includes
  62                                         $matches = array();
  63
  64                                         if ( preg_match( '/^([^.]*)\.php$/', $file, $matches ) ) {
  65                                                 $aSkin = $matches[1];
  66                                                 $wgValidSkinNames[strtolower( $aSkin )] = $aSkin;
  67                                         }
  68                                 }
  69                                 $skinDir->close();
  70                         }
  71                         $skinsInitialised = true;
  72                         wfProfileOut( __METHOD__ . '-init' );
  73                 }
  74                 return $wgValidSkinNames;
  75         }
  76
  77         /**
  78          * Fetch the skinname messages for available skins.
  79          * @return string[]
  80          */
  81         static function getSkinNameMessages() {
  82                 $messages = array();
  83                 foreach ( self::getSkinNames() as $skinKey => $skinName ) {
  84                         // Messages: skinname-vector, skinname-monobook
  85                         $messages[] = "skinname-$skinKey";
  86                 }
  87                 return $messages;
  88         }
  89
  90         /**
  91          * Fetch the list of user-selectable skins in regards to $wgSkipSkins.
  92          * Useful for Special:Preferences and other places where you
  93          * only want to show skins users _can_ use.
  94          * @return string[]
  95          * @since 1.23
  96          */
  97         public static function getAllowedSkins() {
  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          * @deprecated since 1.23, use getAllowedSkins
 111          * @return string[]
 112          */
 113         public static function getUsableSkins() {
 114                 wfDeprecated( __METHOD__, '1.23' );
 115                 return self::getAllowedSkins();
 116         }
 117
 118         /**
 119          * Normalize a skin preference value to a form that can be loaded.
 120          * If a skin can't be found, it will fall back to the configured
 121          * default, or the hardcoded default if that's broken.
 122          * @param string $key 'monobook', 'vector', etc.
 123          * @return string
 124          */
 125         static function normalizeKey( $key ) {
 126                 global $wgDefaultSkin;
 127
 128                 $skinNames = Skin::getSkinNames();
 129
 130                 if ( $key == '' || $key == 'default' ) {
 131                         // Don't return the default immediately;
 132                         // in a misconfiguration we need to fall back.
 133                         $key = $wgDefaultSkin;
 134                 }
 135
 136                 if ( isset( $skinNames[$key] ) ) {
 137                         return $key;
 138                 }
 139
 140                 // Older versions of the software used a numeric setting
 141                 // in the user preferences.
 142                 $fallback = array(
 143                         0 => $wgDefaultSkin,
 144                         2 => 'cologneblue'
 145                 );
 146
 147                 if ( isset( $fallback[$key] ) ) {
 148                         $key = $fallback[$key];
 149                 }
 150
 151                 if ( isset( $skinNames[$key] ) ) {
 152                         return $key;
 153                 } elseif ( isset( $skinNames[$wgDefaultSkin] ) ) {
 154                         return $wgDefaultSkin;
 155                 } else {
 156                         return 'vector';
 157                 }
 158         }
 159
 160         /**
 161          * Factory method for loading a skin of a given type
 162          * @param string $key 'monobook', 'vector', etc.
 163          * @return Skin
 164          */
 165         static function &newFromKey( $key ) {
 166                 global $wgStyleDirectory;
 167
 168                 $key = Skin::normalizeKey( $key );
 169
 170                 $skinNames = Skin::getSkinNames();
 171                 $skinName = $skinNames[$key];
 172                 $className = "Skin{$skinName}";
 173
 174                 # Grab the skin class and initialise it.
 175                 if ( !class_exists( $className ) ) {
 176
 177                         require_once "{$wgStyleDirectory}/{$skinName}.php";
 178
 179                         # Check if we got if not fallback to default skin
 180                         if ( !class_exists( $className ) ) {
 181                                 # DO NOT die if the class isn't found. This breaks maintenance
 182                                 # scripts and can cause a user account to be unrecoverable
 183                                 # except by SQL manipulation if a previously valid skin name
 184                                 # is no longer valid.
 185                                 wfDebug( "Skin class does not exist: $className\n" );
 186                                 $className = 'SkinVector';
 187                                 require_once "{$wgStyleDirectory}/Vector.php";
 188                         }
 189                 }
 190                 $skin = new $className( $key );
 191                 return $skin;
 192         }
 193
 194         /**
 195          * @return string Skin name
 196          */
 197         public function getSkinName() {
 198                 return $this->skinname;
 199         }
 200
 201         /**
 202          * @param OutputPage $out
 203          */
 204         function initPage( OutputPage $out ) {
 205                 wfProfileIn( __METHOD__ );
 206
 207                 $this->preloadExistence();
 208
 209                 wfProfileOut( __METHOD__ );
 210         }
 211
 212         /**
 213          * Defines the ResourceLoader modules that should be added to the skin
 214          * It is recommended that skins wishing to override call parent::getDefaultModules()
 215          * and substitute out any modules they wish to change by using a key to look them up
 216          * @return array Array of modules with helper keys for easy overriding
 217          */
 218         public function getDefaultModules() {
 219                 global $wgIncludeLegacyJavaScript, $wgPreloadJavaScriptMwUtil, $wgUseAjax,
 220                         $wgAjaxWatch, $wgEnableAPI, $wgEnableWriteAPI;
 221
 222                 $out = $this->getOutput();
 223                 $user = $out->getUser();
 224                 $modules = array(
 225                         // modules that enhance the page content in some way
 226                         'content' => array(
 227                                 'mediawiki.page.ready',
 228                         ),
 229                         // modules that exist for legacy reasons
 230                         'legacy' => array(),
 231                         // modules relating to search functionality
 232                         'search' => array(),
 233                         // modules relating to functionality relating to watching an article
 234                         'watch' => array(),
 235                         // modules which relate to the current users preferences
 236                         'user' => array(),
 237                 );
 238                 if ( $wgIncludeLegacyJavaScript ) {
 239                         $modules['legacy'][] = 'mediawiki.legacy.wikibits';
 240                 }
 241
 242                 if ( $wgPreloadJavaScriptMwUtil ) {
 243                         $modules['legacy'][] = 'mediawiki.util';
 244                 }
 245
 246                 // Add various resources if required
 247                 if ( $wgUseAjax ) {
 248                         $modules['legacy'][] = 'mediawiki.legacy.ajax';
 249
 250                         if ( $wgEnableAPI ) {
 251                                 if ( $wgEnableWriteAPI && $wgAjaxWatch && $user->isLoggedIn()
 252                                         && $user->isAllowed( 'writeapi' )
 253                                 ) {
 254                                         $modules['watch'][] = 'mediawiki.page.watch.ajax';
 255                                 }
 256
 257                                 $modules['search'][] = 'mediawiki.searchSuggest';
 258                         }
 259                 }
 260
 261                 if ( $user->getBoolOption( 'editsectiononrightclick' ) ) {
 262                         $modules['user'][] = 'mediawiki.action.view.rightClickEdit';
 263                 }
 264
 265                 // Crazy edit-on-double-click stuff
 266                 if ( $out->isArticle() && $user->getOption( 'editondblclick' ) ) {
 267                         $modules['user'][] = 'mediawiki.action.view.dblClickEdit';
 268                 }
 269                 return $modules;
 270         }
 271
 272         /**
 273          * Preload the existence of three commonly-requested pages in a single query
 274          */
 275         function preloadExistence() {
 276                 $user = $this->getUser();
 277
 278                 // User/talk link
 279                 $titles = array( $user->getUserPage(), $user->getTalkPage() );
 280
 281                 // Other tab link
 282                 if ( $this->getTitle()->isSpecialPage() ) {
 283                         // nothing
 284                 } elseif ( $this->getTitle()->isTalkPage() ) {
 285                         $titles[] = $this->getTitle()->getSubjectPage();
 286                 } else {
 287                         $titles[] = $this->getTitle()->getTalkPage();
 288                 }
 289
 290                 $lb = new LinkBatch( $titles );
 291                 $lb->setCaller( __METHOD__ );
 292                 $lb->execute();
 293         }
 294
 295         /**
 296          * Get the current revision ID
 297          *
 298          * @return int
 299          */
 300         public function getRevisionId() {
 301                 return $this->getOutput()->getRevisionId();
 302         }
 303
 304         /**
 305          * Whether the revision displayed is the latest revision of the page
 306          *
 307          * @return bool
 308          */
 309         public function isRevisionCurrent() {
 310                 $revID = $this->getRevisionId();
 311                 return $revID == 0 || $revID == $this->getTitle()->getLatestRevID();
 312         }
 313
 314         /**
 315          * Set the "relevant" title
 316          * @see self::getRelevantTitle()
 317          * @param Title $t
 318          */
 319         public function setRelevantTitle( $t ) {
 320                 $this->mRelevantTitle = $t;
 321         }
 322
 323         /**
 324          * Return the "relevant" title.
 325          * A "relevant" title is not necessarily the actual title of the page.
 326          * Special pages like Special:MovePage use set the page they are acting on
 327          * as their "relevant" title, this allows the skin system to display things
 328          * such as content tabs which belong to to that page instead of displaying
 329          * a basic special page tab which has almost no meaning.
 330          *
 331          * @return Title
 332          */
 333         public function getRelevantTitle() {
 334                 if ( isset( $this->mRelevantTitle ) ) {
 335                         return $this->mRelevantTitle;
 336                 }
 337                 return $this->getTitle();
 338         }
 339
 340         /**
 341          * Set the "relevant" user
 342          * @see self::getRelevantUser()
 343          * @param User $u
 344          */
 345         public function setRelevantUser( $u ) {
 346                 $this->mRelevantUser = $u;
 347         }
 348
 349         /**
 350          * Return the "relevant" user.
 351          * A "relevant" user is similar to a relevant title. Special pages like
 352          * Special:Contributions mark the user which they are relevant to so that
 353          * things like the toolbox can display the information they usually are only
 354          * able to display on a user's userpage and talkpage.
 355          * @return User
 356          */
 357         public function getRelevantUser() {
 358                 if ( isset( $this->mRelevantUser ) ) {
 359                         return $this->mRelevantUser;
 360                 }
 361                 $title = $this->getRelevantTitle();
 362                 if ( $title->hasSubjectNamespace( NS_USER ) ) {
 363                         $rootUser = $title->getRootText();
 364                         if ( User::isIP( $rootUser ) ) {
 365                                 $this->mRelevantUser = User::newFromName( $rootUser, false );
 366                         } else {
 367                                 $user = User::newFromName( $rootUser, false );
 368                                 if ( $user && $user->isLoggedIn() ) {
 369                                         $this->mRelevantUser = $user;
 370                                 }
 371                         }
 372                         return $this->mRelevantUser;
 373                 }
 374                 return null;
 375         }
 376
 377         /**
 378          * Outputs the HTML generated by other functions.
 379          * @param OutputPage $out
 380          */
 381         abstract function outputPage( OutputPage $out = null );
 382
 383         /**
 384          * @param array $data
 385          * @return string
 386          */
 387         static function makeVariablesScript( $data ) {
 388                 if ( $data ) {
 389                         return Html::inlineScript(
 390                                 ResourceLoader::makeLoaderConditionalScript( ResourceLoader::makeConfigSetScript( $data ) )
 391                         );
 392                 } else {
 393                         return '';
 394                 }
 395         }
 396
 397         /**
 398          * Make a "<script>" tag containing global variables
 399          *
 400          * @deprecated since 1.19
 401          * @param mixed $unused
 402          * @return string HTML fragment
 403          */
 404         public static function makeGlobalVariablesScript( $unused ) {
 405                 global $wgOut;
 406
 407                 wfDeprecated( __METHOD__, '1.19' );
 408
 409                 return self::makeVariablesScript( $wgOut->getJSVars() );
 410         }
 411
 412         /**
 413          * Get the query to generate a dynamic stylesheet
 414          *
 415          * @return array
 416          */
 417         public static function getDynamicStylesheetQuery() {
 418                 global $wgSquidMaxage;
 419
 420                 return array(
 421                                 'action' => 'raw',
 422                                 'maxage' => $wgSquidMaxage,
 423                                 'usemsgcache' => 'yes',
 424                                 'ctype' => 'text/css',
 425                                 'smaxage' => $wgSquidMaxage,
 426                         );
 427         }
 428
 429         /**
 430          * Add skin specific stylesheets
 431          * Calling this method with an $out of anything but the same OutputPage
 432          * inside ->getOutput() is deprecated. The $out arg is kept
 433          * for compatibility purposes with skins.
 434          * @param OutputPage $out
 435          * @todo delete
 436          */
 437         abstract function setupSkinUserCss( OutputPage $out );
 438
 439         /**
 440          * TODO: document
 441          * @param Title $title
 442          * @return string
 443          */
 444         function getPageClasses( $title ) {
 445                 $numeric = 'ns-' . $title->getNamespace();
 446
 447                 if ( $title->isSpecialPage() ) {
 448                         $type = 'ns-special';
 449                         // bug 23315: provide a class based on the canonical special page name without subpages
 450                         list( $canonicalName ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );
 451                         if ( $canonicalName ) {
 452                                 $type .= ' ' . Sanitizer::escapeClass( "mw-special-$canonicalName" );
 453                         } else {
 454                                 $type .= ' mw-invalidspecialpage';
 455                         }
 456                 } elseif ( $title->isTalkPage() ) {
 457                         $type = 'ns-talk';
 458                 } else {
 459                         $type = 'ns-subject';
 460                 }
 461
 462                 $name = Sanitizer::escapeClass( 'page-' . $title->getPrefixedText() );
 463
 464                 return "$numeric $type $name";
 465         }
 466
 467         /*
 468          * Return values for <html> element
 469          * @return array of associative name-to-value elements for <html> element
 470          */
 471         public function getHtmlElementAttributes() {
 472                 $lang = $this->getLanguage();
 473                 return array(
 474                         'lang' => $lang->getHtmlCode(),
 475                         'dir' => $lang->getDir(),
 476                         'class' => 'client-nojs',
 477                 );
 478         }
 479
 480         /**
 481          * This will be called by OutputPage::headElement when it is creating the
 482          * "<body>" tag, skins can override it if they have a need to add in any
 483          * body attributes or classes of their own.
 484          * @param OutputPage $out
 485          * @param array $bodyAttrs
 486          */
 487         function addToBodyAttributes( $out, &$bodyAttrs ) {
 488                 // does nothing by default
 489         }
 490
 491         /**
 492          * URL to the logo
 493          * @return string
 494          */
 495         function getLogo() {
 496                 global $wgLogo;
 497                 return $wgLogo;
 498         }
 499
 500         /**
 501          * @return string
 502          */
 503         function getCategoryLinks() {
 504                 global $wgUseCategoryBrowser;
 505
 506                 $out = $this->getOutput();
 507                 $allCats = $out->getCategoryLinks();
 508
 509                 if ( !count( $allCats ) ) {
 510                         return '';
 511                 }
 512
 513                 $embed = "<li>";
 514                 $pop = "</li>";
 515
 516                 $s = '';
 517                 $colon = $this->msg( 'colon-separator' )->escaped();
 518
 519                 if ( !empty( $allCats['normal'] ) ) {
 520                         $t = $embed . implode( "{$pop}{$embed}", $allCats['normal'] ) . $pop;
 521
 522                         $msg = $this->msg( 'pagecategories' )->numParams( count( $allCats['normal'] ) )->escaped();
 523                         $linkPage = wfMessage( 'pagecategorieslink' )->inContentLanguage()->text();
 524                         $s .= '<div id="mw-normal-catlinks" class="mw-normal-catlinks">' .
 525                                 Linker::link( Title::newFromText( $linkPage ), $msg )
 526                                 . $colon . '<ul>' . $t . '</ul>' . '</div>';
 527                 }
 528
 529                 # Hidden categories
 530                 if ( isset( $allCats['hidden'] ) ) {
 531                         if ( $this->getUser()->getBoolOption( 'showhiddencats' ) ) {
 532                                 $class = ' mw-hidden-cats-user-shown';
 533                         } elseif ( $this->getTitle()->getNamespace() == NS_CATEGORY ) {
 534                                 $class = ' mw-hidden-cats-ns-shown';
 535                         } else {
 536                                 $class = ' mw-hidden-cats-hidden';
 537                         }
 538
 539                         $s .= "<div id=\"mw-hidden-catlinks\" class=\"mw-hidden-catlinks$class\">" .
 540                                 $this->msg( 'hidden-categories' )->numParams( count( $allCats['hidden'] ) )->escaped() .
 541                                 $colon . '<ul>' . $embed . implode( "{$pop}{$embed}", $allCats['hidden'] ) . $pop . '</ul>' .
 542                                 '</div>';
 543                 }
 544
 545                 # optional 'dmoz-like' category browser. Will be shown under the list
 546                 # of categories an article belong to
 547                 if ( $wgUseCategoryBrowser ) {
 548                         $s .= '<br /><hr />';
 549
 550                         # get a big array of the parents tree
 551                         $parenttree = $this->getTitle()->getParentCategoryTree();
 552                         # Skin object passed by reference cause it can not be
 553                         # accessed under the method subfunction drawCategoryBrowser
 554                         $tempout = explode( "\n", $this->drawCategoryBrowser( $parenttree ) );
 555                         # Clean out bogus first entry and sort them
 556                         unset( $tempout[0] );
 557                         asort( $tempout );
 558                         # Output one per line
 559                         $s .= implode( "<br />\n", $tempout );
 560                 }
 561
 562                 return $s;
 563         }
 564
 565         /**
 566          * Render the array as a series of links.
 567          * @param array $tree Categories tree returned by Title::getParentCategoryTree
 568          * @return string Separated by &gt;, terminate with "\n"
 569          */
 570         function drawCategoryBrowser( $tree ) {
 571                 $return = '';
 572
 573                 foreach ( $tree as $element => $parent ) {
 574                         if ( empty( $parent ) ) {
 575                                 # element start a new list
 576                                 $return .= "\n";
 577                         } else {
 578                                 # grab the others elements
 579                                 $return .= $this->drawCategoryBrowser( $parent ) . ' &gt; ';
 580                         }
 581
 582                         # add our current element to the list
 583                         $eltitle = Title::newFromText( $element );
 584                         $return .= Linker::link( $eltitle, htmlspecialchars( $eltitle->getText() ) );
 585                 }
 586
 587                 return $return;
 588         }
 589
 590         /**
 591          * @return string
 592          */
 593         function getCategories() {
 594                 $out = $this->getOutput();
 595
 596                 $catlinks = $this->getCategoryLinks();
 597
 598                 $classes = 'catlinks';
 599
 600                 // Check what we're showing
 601                 $allCats = $out->getCategoryLinks();
 602                 $showHidden = $this->getUser()->getBoolOption( 'showhiddencats' ) ||
 603                                                 $this->getTitle()->getNamespace() == NS_CATEGORY;
 604
 605                 if ( empty( $allCats['normal'] ) && !( !empty( $allCats['hidden'] ) && $showHidden ) ) {
 606                         $classes .= ' catlinks-allhidden';
 607                 }
 608
 609                 return "<div id='catlinks' class='$classes'>{$catlinks}</div>";
 610         }
 611
 612         /**
 613          * This runs a hook to allow extensions placing their stuff after content
 614          * and article metadata (e.g. categories).
 615          * Note: This function has nothing to do with afterContent().
 616          *
 617          * This hook is placed here in order to allow using the same hook for all
 618          * skins, both the SkinTemplate based ones and the older ones, which directly
 619          * use this class to get their data.
 620          *
 621          * The output of this function gets processed in SkinTemplate::outputPage() for
 622          * the SkinTemplate based skins, all other skins should directly echo it.
 623          *
 624          * @return string Empty by default, if not changed by any hook function.
 625          */
 626         protected function afterContentHook() {
 627                 $data = '';
 628
 629                 if ( wfRunHooks( 'SkinAfterContent', array( &$data, $this ) ) ) {
 630                         // adding just some spaces shouldn't toggle the output
 631                         // of the whole <div/>, so we use trim() here
 632                         if ( trim( $data ) != '' ) {
 633                                 // Doing this here instead of in the skins to
 634                                 // ensure that the div has the same ID in all
 635                                 // skins
 636                                 $data = "<div id='mw-data-after-content'>\n" .
 637                                         "\t$data\n" .
 638                                         "</div>\n";
 639                         }
 640                 } else {
 641                         wfDebug( "Hook SkinAfterContent changed output processing.\n" );
 642                 }
 643
 644                 return $data;
 645         }
 646
 647         /**
 648          * Generate debug data HTML for displaying at the bottom of the main content
 649          * area.
 650          * @return string HTML containing debug data, if enabled (otherwise empty).
 651          */
 652         protected function generateDebugHTML() {
 653                 return MWDebug::getHTMLDebugLog();
 654         }
 655
 656         /**
 657          * This gets called shortly before the "</body>" tag.
 658          *
 659          * @return string HTML-wrapped JS code to be put before "</body>"
 660          */
 661         function bottomScripts() {
 662                 // TODO and the suckage continues. This function is really just a wrapper around
 663                 // OutputPage::getBottomScripts() which takes a Skin param. This should be cleaned
 664                 // up at some point
 665                 $bottomScriptText = $this->getOutput()->getBottomScripts();
 666                 wfRunHooks( 'SkinAfterBottomScripts', array( $this, &$bottomScriptText ) );
 667
 668                 return $bottomScriptText;
 669         }
 670
 671         /**
 672          * Text with the permalink to the source page,
 673          * usually shown on the footer of a printed page
 674          *
 675          * @return string HTML text with an URL
 676          */
 677         function printSource() {
 678                 $oldid = $this->getRevisionId();
 679                 if ( $oldid ) {
 680                         $canonicalUrl = $this->getTitle()->getCanonicalURL( 'oldid=' . $oldid );
 681                         $url = htmlspecialchars( wfExpandIRI( $canonicalUrl ) );
 682                 } else {
 683                         // oldid not available for non existing pages
 684                         $url = htmlspecialchars( wfExpandIRI( $this->getTitle()->getCanonicalURL() ) );
 685                 }
 686
 687                 return $this->msg( 'retrievedfrom', '<a dir="ltr" href="' . $url
 688                         . '">' . $url . '</a>' )->text();
 689         }
 690
 691         /**
 692          * @return string
 693          */
 694         function getUndeleteLink() {
 695                 $action = $this->getRequest()->getVal( 'action', 'view' );
 696
 697                 if ( $this->getUser()->isAllowed( 'deletedhistory' ) &&
 698                         ( $this->getTitle()->getArticleID() == 0 || $action == 'history' ) ) {
 699                         $n = $this->getTitle()->isDeleted();
 700
 701                         if ( $n ) {
 702                                 if ( $this->getUser()->isAllowed( 'undelete' ) ) {
 703                                         $msg = 'thisisdeleted';
 704                                 } else {
 705                                         $msg = 'viewdeleted';
 706                                 }
 707
 708                                 return $this->msg( $msg )->rawParams(
 709                                         Linker::linkKnown(
 710                                                 SpecialPage::getTitleFor( 'Undelete', $this->getTitle()->getPrefixedDBkey() ),
 711                                                 $this->msg( 'restorelink' )->numParams( $n )->escaped() )
 712                                         )->text();
 713                         }
 714                 }
 715
 716                 return '';
 717         }
 718
 719         /**
 720          * @return string
 721          */
 722         function subPageSubtitle() {
 723                 $out = $this->getOutput();
 724                 $subpages = '';
 725
 726                 if ( !wfRunHooks( 'SkinSubPageSubtitle', array( &$subpages, $this, $out ) ) ) {
 727                         return $subpages;
 728                 }
 729
 730                 if ( $out->isArticle() && MWNamespace::hasSubpages( $out->getTitle()->getNamespace() ) ) {
 731                         $ptext = $this->getTitle()->getPrefixedText();
 732                         if ( preg_match( '/\//', $ptext ) ) {
 733                                 $links = explode( '/', $ptext );
 734                                 array_pop( $links );
 735                                 $c = 0;
 736                                 $growinglink = '';
 737                                 $display = '';
 738                                 $lang = $this->getLanguage();
 739
 740                                 foreach ( $links as $link ) {
 741                                         $growinglink .= $link;
 742                                         $display .= $link;
 743                                         $linkObj = Title::newFromText( $growinglink );
 744
 745                                         if ( is_object( $linkObj ) && $linkObj->isKnown() ) {
 746                                                 $getlink = Linker::linkKnown(
 747                                                         $linkObj,
 748                                                         htmlspecialchars( $display )
 749                                                 );
 750
 751                                                 $c++;
 752
 753                                                 if ( $c > 1 ) {
 754                                                         $subpages .= $lang->getDirMarkEntity() . $this->msg( 'pipe-separator' )->escaped();
 755                                                 } else {
 756                                                         $subpages .= '&lt; ';
 757                                                 }
 758
 759                                                 $subpages .= $getlink;
 760                                                 $display = '';
 761                                         } else {
 762                                                 $display .= '/';
 763                                         }
 764                                         $growinglink .= '/';
 765                                 }
 766                         }
 767                 }
 768
 769                 return $subpages;
 770         }
 771
 772         /**
 773          * Returns true if the IP should be shown in the header
 774          * @return bool
 775          */
 776         function showIPinHeader() {
 777                 global $wgShowIPinHeader;
 778                 return $wgShowIPinHeader && session_id() != '';
 779         }
 780
 781         /**
 782          * @return string
 783          */
 784         function getSearchLink() {
 785                 $searchPage = SpecialPage::getTitleFor( 'Search' );
 786                 return $searchPage->getLocalURL();
 787         }
 788
 789         /**
 790          * @return string
 791          */
 792         function escapeSearchLink() {
 793                 return htmlspecialchars( $this->getSearchLink() );
 794         }
 795
 796         /**
 797          * @param string $type
 798          * @return string
 799          */
 800         function getCopyright( $type = 'detect' ) {
 801                 global $wgRightsPage, $wgRightsUrl, $wgRightsText, $wgContLang;
 802
 803                 if ( $type == 'detect' ) {
 804                         if ( !$this->isRevisionCurrent()
 805                                 && !$this->msg( 'history_copyright' )->inContentLanguage()->isDisabled()
 806                         ) {
 807                                 $type = 'history';
 808                         } else {
 809                                 $type = 'normal';
 810                         }
 811                 }
 812
 813                 if ( $type == 'history' ) {
 814                         $msg = 'history_copyright';
 815                 } else {
 816                         $msg = 'copyright';
 817                 }
 818
 819                 if ( $wgRightsPage ) {
 820                         $title = Title::newFromText( $wgRightsPage );
 821                         $link = Linker::linkKnown( $title, $wgRightsText );
 822                 } elseif ( $wgRightsUrl ) {
 823                         $link = Linker::makeExternalLink( $wgRightsUrl, $wgRightsText );
 824                 } elseif ( $wgRightsText ) {
 825                         $link = $wgRightsText;
 826                 } else {
 827                         # Give up now
 828                         return '';
 829                 }
 830
 831                 // Allow for site and per-namespace customization of copyright notice.
 832                 // @todo Remove deprecated $forContent param from hook handlers and then remove here.
 833                 $forContent = true;
 834
 835                 wfRunHooks(
 836                         'SkinCopyrightFooter',
 837                         array( $this->getTitle(), $type, &$msg, &$link, &$forContent )
 838                 );
 839
 840                 return $this->msg( $msg )->rawParams( $link )->text();
 841         }
 842
 843         /**
 844          * @return null|string
 845          */
 846         function getCopyrightIcon() {
 847                 global $wgRightsUrl, $wgRightsText, $wgRightsIcon, $wgCopyrightIcon;
 848
 849                 $out = '';
 850
 851                 if ( isset( $wgCopyrightIcon ) && $wgCopyrightIcon ) {
 852                         $out = $wgCopyrightIcon;
 853                 } elseif ( $wgRightsIcon ) {
 854                         $icon = htmlspecialchars( $wgRightsIcon );
 855
 856                         if ( $wgRightsUrl ) {
 857                                 $url = htmlspecialchars( $wgRightsUrl );
 858                                 $out .= '<a href="' . $url . '">';
 859                         }
 860
 861                         $text = htmlspecialchars( $wgRightsText );
 862                         $out .= "<img src=\"$icon\" alt=\"$text\" width=\"88\" height=\"31\" />";
 863
 864                         if ( $wgRightsUrl ) {
 865                                 $out .= '</a>';
 866                         }
 867                 }
 868
 869                 return $out;
 870         }
 871
 872         /**
 873          * Gets the powered by MediaWiki icon.
 874          * @return string
 875          */
 876         function getPoweredBy() {
 877                 global $wgStylePath;
 878
 879                 $url = htmlspecialchars( "$wgStylePath/common/images/poweredby_mediawiki_88x31.png" );
 880                 $text = '<a href="//www.mediawiki.org/"><img src="' . $url
 881                         . '" height="31" width="88" alt="Powered by MediaWiki" /></a>';
 882                 wfRunHooks( 'SkinGetPoweredBy', array( &$text, $this ) );
 883                 return $text;
 884         }
 885
 886         /**
 887          * Get the timestamp of the latest revision, formatted in user language
 888          *
 889          * @return string
 890          */
 891         protected function lastModified() {
 892                 $timestamp = $this->getOutput()->getRevisionTimestamp();
 893
 894                 # No cached timestamp, load it from the database
 895                 if ( $timestamp === null ) {
 896                         $timestamp = Revision::getTimestampFromId( $this->getTitle(), $this->getRevisionId() );
 897                 }
 898
 899                 if ( $timestamp ) {
 900                         $d = $this->getLanguage()->userDate( $timestamp, $this->getUser() );
 901                         $t = $this->getLanguage()->userTime( $timestamp, $this->getUser() );
 902                         $s = ' ' . $this->msg( 'lastmodifiedat', $d, $t )->text();
 903                 } else {
 904                         $s = '';
 905                 }
 906
 907                 if ( wfGetLB()->getLaggedSlaveMode() ) {
 908                         $s .= ' <strong>' . $this->msg( 'laggedslavemode' )->text() . '</strong>';
 909                 }
 910
 911                 return $s;
 912         }
 913
 914         /**
 915          * @param string $align
 916          * @return string
 917          */
 918         function logoText( $align = '' ) {
 919                 if ( $align != '' ) {
 920                         $a = " style='float: {$align};'";
 921                 } else {
 922                         $a = '';
 923                 }
 924
 925                 $mp = $this->msg( 'mainpage' )->escaped();
 926                 $mptitle = Title::newMainPage();
 927                 $url = ( is_object( $mptitle ) ? htmlspecialchars( $mptitle->getLocalURL() ) : '' );
 928
 929                 $logourl = $this->getLogo();
 930                 $s = "<a href='{$url}'><img{$a} src='{$logourl}' alt='[{$mp}]' /></a>";
 931
 932                 return $s;
 933         }
 934
 935         /**
 936          * Renders a $wgFooterIcons icon according to the method's arguments
 937          * @param array $icon The icon to build the html for, see $wgFooterIcons
 938          *   for the format of this array.
 939          * @param bool|string $withImage Whether to use the icon's image or output
 940          *   a text-only footericon.
 941          * @return string HTML
 942          */
 943         function makeFooterIcon( $icon, $withImage = 'withImage' ) {
 944                 if ( is_string( $icon ) ) {
 945                         $html = $icon;
 946                 } else { // Assuming array
 947                         $url = isset( $icon["url"] ) ? $icon["url"] : null;
 948                         unset( $icon["url"] );
 949                         if ( isset( $icon["src"] ) && $withImage === 'withImage' ) {
 950                                 // do this the lazy way, just pass icon data as an attribute array
 951                                 $html = Html::element( 'img', $icon );
 952                         } else {
 953                                 $html = htmlspecialchars( $icon["alt"] );
 954                         }
 955                         if ( $url ) {
 956                                 $html = Html::rawElement( 'a', array( "href" => $url ), $html );
 957                         }
 958                 }
 959                 return $html;
 960         }
 961
 962         /**
 963          * Gets the link to the wiki's main page.
 964          * @return string
 965          */
 966         function mainPageLink() {
 967                 $s = Linker::linkKnown(
 968                         Title::newMainPage(),
 969                         $this->msg( 'mainpage' )->escaped()
 970                 );
 971
 972                 return $s;
 973         }
 974
 975         /**
 976          * Returns an HTML link for use in the footer
 977          * @param string $desc i18n message key for the link text
 978          * @param string $page i18n message key for the page to link to
 979          * @return string HTML anchor
 980          */
 981         public function footerLink( $desc, $page ) {
 982                 // if the link description has been set to "-" in the default language,
 983                 if ( $this->msg( $desc )->inContentLanguage()->isDisabled() ) {
 984                         // then it is disabled, for all languages.
 985                         return '';
 986                 } else {
 987                         // Otherwise, we display the link for the user, described in their
 988                         // language (which may or may not be the same as the default language),
 989                         // but we make the link target be the one site-wide page.
 990                         $title = Title::newFromText( $this->msg( $page )->inContentLanguage()->text() );
 991
 992                         return Linker::linkKnown(
 993                                 $title,
 994                                 $this->msg( $desc )->escaped()
 995                         );
 996                 }
 997         }
 998
 999         /**
1000          * Gets the link to the wiki's privacy policy page.
1001          * @return string HTML
1002          */
1003         function privacyLink() {
1004                 return $this->footerLink( 'privacy', 'privacypage' );
1005         }
1006
1007         /**
1008          * Gets the link to the wiki's about page.
1009          * @return string HTML
1010          */
1011         function aboutLink() {
1012                 return $this->footerLink( 'aboutsite', 'aboutpage' );
1013         }
1014
1015         /**
1016          * Gets the link to the wiki's general disclaimers page.
1017          * @return string HTML
1018          */
1019         function disclaimerLink() {
1020                 return $this->footerLink( 'disclaimers', 'disclaimerpage' );
1021         }
1022
1023         /**
1024          * Return URL options for the 'edit page' link.
1025          * This may include an 'oldid' specifier, if the current page view is such.
1026          *
1027          * @return array
1028          * @private
1029          */
1030         function editUrlOptions() {
1031                 $options = array( 'action' => 'edit' );
1032
1033                 if ( !$this->isRevisionCurrent() ) {
1034                         $options['oldid'] = intval( $this->getRevisionId() );
1035                 }
1036
1037                 return $options;
1038         }
1039
1040         /**
1041          * @param User|int $id
1042          * @return bool
1043          */
1044         function showEmailUser( $id ) {
1045                 if ( $id instanceof User ) {
1046                         $targetUser = $id;
1047                 } else {
1048                         $targetUser = User::newFromId( $id );
1049                 }
1050
1051                 # The sending user must have a confirmed email address and the target
1052                 # user must have a confirmed email address and allow emails from users.
1053                 return $this->getUser()->canSendEmail() &&
1054                         $targetUser->canReceiveEmail();
1055         }
1056
1057         /**
1058          * Return a fully resolved style path url to images or styles stored in the common folder.
1059          * This method returns a url resolved using the configured skin style path
1060          * and includes the style version inside of the url.
1061          * @param string $name The name or path of a skin resource file
1062          * @return string The fully resolved style path url including styleversion
1063          */
1064         function getCommonStylePath( $name ) {
1065                 global $wgStylePath, $wgStyleVersion;
1066                 return "$wgStylePath/common/$name?$wgStyleVersion";
1067         }
1068
1069         /**
1070          * Return a fully resolved style path url to images or styles stored in the current skins's folder.
1071          * This method returns a url resolved using the configured skin style path
1072          * and includes the style version inside of the url.
1073          * @param string $name The name or path of a skin resource file
1074          * @return string The fully resolved style path url including styleversion
1075          */
1076         function getSkinStylePath( $name ) {
1077                 global $wgStylePath, $wgStyleVersion;
1078                 return "$wgStylePath/{$this->stylename}/$name?$wgStyleVersion";
1079         }
1080
1081         /* these are used extensively in SkinTemplate, but also some other places */
1082
1083         /**
1084          * @param string $urlaction
1085          * @return string
1086          */
1087         static function makeMainPageUrl( $urlaction = '' ) {
1088                 $title = Title::newMainPage();
1089                 self::checkTitle( $title, '' );
1090
1091                 return $title->getLocalURL( $urlaction );
1092         }
1093
1094         /**
1095          * Make a URL for a Special Page using the given query and protocol.
1096          *
1097          * If $proto is set to null, make a local URL. Otherwise, make a full
1098          * URL with the protocol specified.
1099          *
1100          * @param string $name Name of the Special page
1101          * @param string $urlaction Query to append
1102          * @param string|null $proto Protocol to use or null for a local URL
1103          * @return string
1104          */
1105         static function makeSpecialUrl( $name, $urlaction = '', $proto = null ) {
1106                 $title = SpecialPage::getSafeTitleFor( $name );
1107                 if ( is_null( $proto ) ) {
1108                         return $title->getLocalURL( $urlaction );
1109                 } else {
1110                         return $title->getFullURL( $urlaction, false, $proto );
1111                 }
1112         }
1113
1114         /**
1115          * @param string $name
1116          * @param string $subpage
1117          * @param string $urlaction
1118          * @return string
1119          */
1120         static function makeSpecialUrlSubpage( $name, $subpage, $urlaction = '' ) {
1121                 $title = SpecialPage::getSafeTitleFor( $name, $subpage );
1122                 return $title->getLocalURL( $urlaction );
1123         }
1124
1125         /**
1126          * @param string $name
1127          * @param string $urlaction
1128          * @return string
1129          */
1130         static function makeI18nUrl( $name, $urlaction = '' ) {
1131                 $title = Title::newFromText( wfMessage( $name )->inContentLanguage()->text() );
1132                 self::checkTitle( $title, $name );
1133                 return $title->getLocalURL( $urlaction );
1134         }
1135
1136         /**
1137          * @param string $name
1138          * @param string $urlaction
1139          * @return string
1140          */
1141         static function makeUrl( $name, $urlaction = '' ) {
1142                 $title = Title::newFromText( $name );
1143                 self::checkTitle( $title, $name );
1144
1145                 return $title->getLocalURL( $urlaction );
1146         }
1147
1148         /**
1149          * If url string starts with http, consider as external URL, else
1150          * internal
1151          * @param string $name
1152          * @return string URL
1153          */
1154         static function makeInternalOrExternalUrl( $name ) {
1155                 if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $name ) ) {
1156                         return $name;
1157                 } else {
1158                         return self::makeUrl( $name );
1159                 }
1160         }
1161
1162         /**
1163          * this can be passed the NS number as defined in Language.php
1164          * @param string $name
1165          * @param string $urlaction
1166          * @param int $namespace
1167          * @return string
1168          */
1169         static function makeNSUrl( $name, $urlaction = '', $namespace = NS_MAIN ) {
1170                 $title = Title::makeTitleSafe( $namespace, $name );
1171                 self::checkTitle( $title, $name );
1172
1173                 return $title->getLocalURL( $urlaction );
1174         }
1175
1176         /**
1177          * these return an array with the 'href' and boolean 'exists'
1178          * @param string $name
1179          * @param string $urlaction
1180          * @return array
1181          */
1182         static function makeUrlDetails( $name, $urlaction = '' ) {
1183                 $title = Title::newFromText( $name );
1184                 self::checkTitle( $title, $name );
1185
1186                 return array(
1187                         'href' => $title->getLocalURL( $urlaction ),
1188                         'exists' => $title->getArticleID() != 0,
1189                 );
1190         }
1191
1192         /**
1193          * Make URL details where the article exists (or at least it's convenient to think so)
1194          * @param string $name Article name
1195          * @param string $urlaction
1196          * @return array
1197          */
1198         static function makeKnownUrlDetails( $name, $urlaction = '' ) {
1199                 $title = Title::newFromText( $name );
1200                 self::checkTitle( $title, $name );
1201
1202                 return array(
1203                         'href' => $title->getLocalURL( $urlaction ),
1204                         'exists' => true
1205                 );
1206         }
1207
1208         /**
1209          * make sure we have some title to operate on
1210          *
1211          * @param Title $title
1212          * @param string $name
1213          */
1214         static function checkTitle( &$title, $name ) {
1215                 if ( !is_object( $title ) ) {
1216                         $title = Title::newFromText( $name );
1217                         if ( !is_object( $title ) ) {
1218                                 $title = Title::newFromText( '--error: link target missing--' );
1219                         }
1220                 }
1221         }
1222
1223         /**
1224          * Build an array that represents the sidebar(s), the navigation bar among them.
1225          *
1226          * BaseTemplate::getSidebar can be used to simplify the format and id generation in new skins.
1227          *
1228          * The format of the returned array is array( heading => content, ... ), where:
1229          * - heading is the heading of a navigation portlet. It is either:
1230          *   - magic string to be handled by the skins ('SEARCH' / 'LANGUAGES' / 'TOOLBOX' / ...)
1231          *   - a message name (e.g. 'navigation'), the message should be HTML-escaped by the skin
1232          *   - plain text, which should be HTML-escaped by the skin
1233          * - content is the contents of the portlet. It is either:
1234          *   - HTML text (<ul><li>...</li>...</ul>)
1235          *   - array of link data in a format accepted by BaseTemplate::makeListItem()
1236          *   - (for a magic string as a key, any value)
1237          *
1238          * Note that extensions can control the sidebar contents using the SkinBuildSidebar hook
1239          * and can technically insert anything in here; skin creators are expected to handle
1240          * values described above.
1241          *
1242          * @return array
1243          */
1244         function buildSidebar() {
1245                 global $wgMemc, $wgEnableSidebarCache, $wgSidebarCacheExpiry;
1246                 wfProfileIn( __METHOD__ );
1247
1248                 $key = wfMemcKey( 'sidebar', $this->getLanguage()->getCode() );
1249
1250                 if ( $wgEnableSidebarCache ) {
1251                         $cachedsidebar = $wgMemc->get( $key );
1252                         if ( $cachedsidebar ) {
1253                                 wfRunHooks( 'SidebarBeforeOutput', array( $this, &$cachedsidebar ) );
1254
1255                                 wfProfileOut( __METHOD__ );
1256                                 return $cachedsidebar;
1257                         }
1258                 }
1259
1260                 $bar = array();
1261                 $this->addToSidebar( $bar, 'sidebar' );
1262
1263                 wfRunHooks( 'SkinBuildSidebar', array( $this, &$bar ) );
1264                 if ( $wgEnableSidebarCache ) {
1265                         $wgMemc->set( $key, $bar, $wgSidebarCacheExpiry );
1266                 }
1267
1268                 wfRunHooks( 'SidebarBeforeOutput', array( $this, &$bar ) );
1269
1270                 wfProfileOut( __METHOD__ );
1271                 return $bar;
1272         }
1273
1274         /**
1275          * Add content from a sidebar system message
1276          * Currently only used for MediaWiki:Sidebar (but may be used by Extensions)
1277          *
1278          * This is just a wrapper around addToSidebarPlain() for backwards compatibility
1279          *
1280          * @param array $bar
1281          * @param string $message
1282          */
1283         function addToSidebar( &$bar, $message ) {
1284                 $this->addToSidebarPlain( $bar, wfMessage( $message )->inContentLanguage()->plain() );
1285         }
1286
1287         /**
1288          * Add content from plain text
1289          * @since 1.17
1290          * @param array $bar
1291          * @param string $text
1292          * @return array
1293          */
1294         function addToSidebarPlain( &$bar, $text ) {
1295                 $lines = explode( "\n", $text );
1296
1297                 $heading = '';
1298
1299                 foreach ( $lines as $line ) {
1300                         if ( strpos( $line, '*' ) !== 0 ) {
1301                                 continue;
1302                         }
1303                         $line = rtrim( $line, "\r" ); // for Windows compat
1304
1305                         if ( strpos( $line, '**' ) !== 0 ) {
1306                                 $heading = trim( $line, '* ' );
1307                                 if ( !array_key_exists( $heading, $bar ) ) {
1308                                         $bar[$heading] = array();
1309                                 }
1310                         } else {
1311                                 $line = trim( $line, '* ' );
1312
1313                                 if ( strpos( $line, '|' ) !== false ) { // sanity check
1314                                         $line = MessageCache::singleton()->transform( $line, false, null, $this->getTitle() );
1315                                         $line = array_map( 'trim', explode( '|', $line, 2 ) );
1316                                         if ( count( $line ) !== 2 ) {
1317                                                 // Second sanity check, could be hit by people doing
1318                                                 // funky stuff with parserfuncs... (bug 33321)
1319                                                 continue;
1320                                         }
1321
1322                                         $extraAttribs = array();
1323
1324                                         $msgLink = $this->msg( $line[0] )->inContentLanguage();
1325                                         if ( $msgLink->exists() ) {
1326                                                 $link = $msgLink->text();
1327                                                 if ( $link == '-' ) {
1328                                                         continue;
1329                                                 }
1330                                         } else {
1331                                                 $link = $line[0];
1332                                         }
1333                                         $msgText = $this->msg( $line[1] );
1334                                         if ( $msgText->exists() ) {
1335                                                 $text = $msgText->text();
1336                                         } else {
1337                                                 $text = $line[1];
1338                                         }
1339
1340                                         if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $link ) ) {
1341                                                 $href = $link;
1342
1343                                                 // Parser::getExternalLinkAttribs won't work here because of the Namespace things
1344                                                 global $wgNoFollowLinks, $wgNoFollowDomainExceptions;
1345                                                 if ( $wgNoFollowLinks && !wfMatchesDomainList( $href, $wgNoFollowDomainExceptions ) ) {
1346                                                         $extraAttribs['rel'] = 'nofollow';
1347                                                 }
1348
1349                                                 global $wgExternalLinkTarget;
1350                                                 if ( $wgExternalLinkTarget ) {
1351                                                         $extraAttribs['target'] = $wgExternalLinkTarget;
1352                                                 }
1353                                         } else {
1354                                                 $title = Title::newFromText( $link );
1355
1356                                                 if ( $title ) {
1357                                                         $title = $title->fixSpecialName();
1358                                                         $href = $title->getLinkURL();
1359                                                 } else {
1360                                                         $href = 'INVALID-TITLE';
1361                                                 }
1362                                         }
1363
1364                                         $bar[$heading][] = array_merge( array(
1365                                                 'text' => $text,
1366                                                 'href' => $href,
1367                                                 'id' => 'n-' . Sanitizer::escapeId( strtr( $line[1], ' ', '-' ), 'noninitial' ),
1368                                                 'active' => false
1369                                         ), $extraAttribs );
1370                                 } else {
1371                                         continue;
1372                                 }
1373                         }
1374                 }
1375
1376                 return $bar;
1377         }
1378
1379         /**
1380          * This function previously controlled whether the 'mediawiki.legacy.wikiprintable' module
1381          * should be loaded by OutputPage. That module no longer exists and the return value of this
1382          * method is ignored.
1383          *
1384          * If your skin doesn't provide its own print styles, the 'mediawiki.legacy.commonPrint' module
1385          * can be used instead (SkinTemplate-based skins do it automatically).
1386          *
1387          * @deprecated since 1.22
1388          * @return bool
1389          */
1390         public function commonPrintStylesheet() {
1391                 wfDeprecated( __METHOD__, '1.22' );
1392                 return false;
1393         }
1394
1395         /**
1396          * Gets new talk page messages for the current user and returns an
1397          * appropriate alert message (or an empty string if there are no messages)
1398          * @return string
1399          */
1400         function getNewtalks() {
1401
1402                 $newMessagesAlert = '';
1403                 $user = $this->getUser();
1404                 $newtalks = $user->getNewMessageLinks();
1405                 $out = $this->getOutput();
1406
1407                 // Allow extensions to disable or modify the new messages alert
1408                 if ( !wfRunHooks( 'GetNewMessagesAlert', array( &$newMessagesAlert, $newtalks, $user, $out ) ) ) {
1409                         return '';
1410                 }
1411                 if ( $newMessagesAlert ) {
1412                         return $newMessagesAlert;
1413                 }
1414
1415                 if ( count( $newtalks ) == 1 && $newtalks[0]['wiki'] === wfWikiID() ) {
1416                         $uTalkTitle = $user->getTalkPage();
1417                         $lastSeenRev = isset( $newtalks[0]['rev'] ) ? $newtalks[0]['rev'] : null;
1418                         $nofAuthors = 0;
1419                         if ( $lastSeenRev !== null ) {
1420                                 $plural = true; // Default if we have a last seen revision: if unknown, use plural
1421                                 $latestRev = Revision::newFromTitle( $uTalkTitle, false, Revision::READ_NORMAL );
1422                                 if ( $latestRev !== null ) {
1423                                         // Singular if only 1 unseen revision, plural if several unseen revisions.
1424                                         $plural = $latestRev->getParentId() !== $lastSeenRev->getId();
1425                                         $nofAuthors = $uTalkTitle->countAuthorsBetween(
1426                                                 $lastSeenRev, $latestRev, 10, 'include_new' );
1427                                 }
1428                         } else {
1429                                 // Singular if no revision -> diff link will show latest change only in any case
1430                                 $plural = false;
1431                         }
1432                         $plural = $plural ? 999 : 1;
1433                         // 999 signifies "more than one revision". We don't know how many, and even if we did,
1434                         // the number of revisions or authors is not necessarily the same as the number of
1435                         // "messages".
1436                         $newMessagesLink = Linker::linkKnown(
1437                                 $uTalkTitle,
1438                                 $this->msg( 'newmessageslinkplural' )->params( $plural )->escaped(),
1439                                 array(),
1440                                 array( 'redirect' => 'no' )
1441                         );
1442
1443                         $newMessagesDiffLink = Linker::linkKnown(
1444                                 $uTalkTitle,
1445                                 $this->msg( 'newmessagesdifflinkplural' )->params( $plural )->escaped(),
1446                                 array(),
1447                                 $lastSeenRev !== null
1448                                         ? array( 'oldid' => $lastSeenRev->getId(), 'diff' => 'cur' )
1449                                         : array( 'diff' => 'cur' )
1450                         );
1451
1452                         if ( $nofAuthors >= 1 && $nofAuthors <= 10 ) {
1453                                 $newMessagesAlert = $this->msg(
1454                                         'youhavenewmessagesfromusers',
1455                                         $newMessagesLink,
1456                                         $newMessagesDiffLink
1457                                 )->numParams( $nofAuthors, $plural );
1458                         } else {
1459                                 // $nofAuthors === 11 signifies "11 or more" ("more than 10")
1460                                 $newMessagesAlert = $this->msg(
1461                                         $nofAuthors > 10 ? 'youhavenewmessagesmanyusers' : 'youhavenewmessages',
1462                                         $newMessagesLink,
1463                                         $newMessagesDiffLink
1464                                 )->numParams( $plural );
1465                         }
1466                         $newMessagesAlert = $newMessagesAlert->text();
1467                         # Disable Squid cache
1468                         $out->setSquidMaxage( 0 );
1469                 } elseif ( count( $newtalks ) ) {
1470                         $sep = $this->msg( 'newtalkseparator' )->escaped();
1471                         $msgs = array();
1472
1473                         foreach ( $newtalks as $newtalk ) {
1474                                 $msgs[] = Xml::element(
1475                                         'a',
1476                                         array( 'href' => $newtalk['link'] ), $newtalk['wiki']
1477                                 );
1478                         }
1479                         $parts = implode( $sep, $msgs );
1480                         $newMessagesAlert = $this->msg( 'youhavenewmessagesmulti' )->rawParams( $parts )->escaped();
1481                         $out->setSquidMaxage( 0 );
1482                 }
1483
1484                 return $newMessagesAlert;
1485         }
1486
1487         /**
1488          * Get a cached notice
1489          *
1490          * @param string $name Message name, or 'default' for $wgSiteNotice
1491          * @return string HTML fragment
1492          */
1493         private function getCachedNotice( $name ) {
1494                 global $wgRenderHashAppend, $parserMemc, $wgContLang;
1495
1496                 wfProfileIn( __METHOD__ );
1497
1498                 $needParse = false;
1499
1500                 if ( $name === 'default' ) {
1501                         // special case
1502                         global $wgSiteNotice;
1503                         $notice = $wgSiteNotice;
1504                         if ( empty( $notice ) ) {
1505                                 wfProfileOut( __METHOD__ );
1506                                 return false;
1507                         }
1508                 } else {
1509                         $msg = $this->msg( $name )->inContentLanguage();
1510                         if ( $msg->isDisabled() ) {
1511                                 wfProfileOut( __METHOD__ );
1512                                 return false;
1513                         }
1514                         $notice = $msg->plain();
1515                 }
1516
1517                 // Use the extra hash appender to let eg SSL variants separately cache.
1518                 $key = wfMemcKey( $name . $wgRenderHashAppend );
1519                 $cachedNotice = $parserMemc->get( $key );
1520                 if ( is_array( $cachedNotice ) ) {
1521                         if ( md5( $notice ) == $cachedNotice['hash'] ) {
1522                                 $notice = $cachedNotice['html'];
1523                         } else {
1524                                 $needParse = true;
1525                         }
1526                 } else {
1527                         $needParse = true;
1528                 }
1529
1530                 if ( $needParse ) {
1531                         $parsed = $this->getOutput()->parse( $notice );
1532                         $parserMemc->set( $key, array( 'html' => $parsed, 'hash' => md5( $notice ) ), 600 );
1533                         $notice = $parsed;
1534                 }
1535
1536                 $notice = Html::rawElement( 'div', array( 'id' => 'localNotice',
1537                         'lang' => $wgContLang->getHtmlCode(), 'dir' => $wgContLang->getDir() ), $notice );
1538                 wfProfileOut( __METHOD__ );
1539                 return $notice;
1540         }
1541
1542         /**
1543          * Get a notice based on page's namespace
1544          *
1545          * @return string HTML fragment
1546          */
1547         function getNamespaceNotice() {
1548                 wfProfileIn( __METHOD__ );
1549
1550                 $key = 'namespacenotice-' . $this->getTitle()->getNsText();
1551                 $namespaceNotice = $this->getCachedNotice( $key );
1552                 if ( $namespaceNotice && substr( $namespaceNotice, 0, 7 ) != '<p>&lt;' ) {
1553                         $namespaceNotice = '<div id="namespacebanner">' . $namespaceNotice . '</div>';
1554                 } else {
1555                         $namespaceNotice = '';
1556                 }
1557
1558                 wfProfileOut( __METHOD__ );
1559                 return $namespaceNotice;
1560         }
1561
1562         /**
1563          * Get the site notice
1564          *
1565          * @return string HTML fragment
1566          */
1567         function getSiteNotice() {
1568                 wfProfileIn( __METHOD__ );
1569                 $siteNotice = '';
1570
1571                 if ( wfRunHooks( 'SiteNoticeBefore', array( &$siteNotice, $this ) ) ) {
1572                         if ( is_object( $this->getUser() ) && $this->getUser()->isLoggedIn() ) {
1573                                 $siteNotice = $this->getCachedNotice( 'sitenotice' );
1574                         } else {
1575                                 $anonNotice = $this->getCachedNotice( 'anonnotice' );
1576                                 if ( !$anonNotice ) {
1577                                         $siteNotice = $this->getCachedNotice( 'sitenotice' );
1578                                 } else {
1579                                         $siteNotice = $anonNotice;
1580                                 }
1581                         }
1582                         if ( !$siteNotice ) {
1583                                 $siteNotice = $this->getCachedNotice( 'default' );
1584                         }
1585                 }
1586
1587                 wfRunHooks( 'SiteNoticeAfter', array( &$siteNotice, $this ) );
1588                 wfProfileOut( __METHOD__ );
1589                 return $siteNotice;
1590         }
1591
1592         /**
1593          * Create a section edit link.  This supersedes editSectionLink() and
1594          * editSectionLinkForOther().
1595          *
1596          * @param Title $nt The title being linked to (may not be the same as
1597          *   the current page, if the section is included from a template)
1598          * @param string $section The designation of the section being pointed to,
1599          *   to be included in the link, like "&section=$section"
1600          * @param string $tooltip The tooltip to use for the link: will be escaped
1601          *   and wrapped in the 'editsectionhint' message
1602          * @param string $lang Language code
1603          * @return string HTML to use for edit link
1604          */
1605         public function doEditSectionLink( Title $nt, $section, $tooltip = null, $lang = false ) {
1606                 // HTML generated here should probably have userlangattributes
1607                 // added to it for LTR text on RTL pages
1608
1609                 $lang = wfGetLangObj( $lang );
1610
1611                 $attribs = array();
1612                 if ( !is_null( $tooltip ) ) {
1613                         # Bug 25462: undo double-escaping.
1614                         $tooltip = Sanitizer::decodeCharReferences( $tooltip );
1615                         $attribs['title'] = wfMessage( 'editsectionhint' )->rawParams( $tooltip )
1616                                 ->inLanguage( $lang )->text();
1617                 }
1618                 $link = Linker::link( $nt, wfMessage( 'editsection' )->inLanguage( $lang )->text(),
1619                         $attribs,
1620                         array( 'action' => 'edit', 'section' => $section ),
1621                         array( 'noclasses', 'known' )
1622                 );
1623
1624                 # Add the brackets and the span and run the hook.
1625                 $result = '<span class="mw-editsection">'
1626                         . '<span class="mw-editsection-bracket">[</span>'
1627                         . $link
1628                         . '<span class="mw-editsection-bracket">]</span>'
1629                         . '</span>';
1630
1631                 wfRunHooks( 'DoEditSectionLink', array( $this, $nt, $section, $tooltip, &$result, $lang ) );
1632                 return $result;
1633         }
1634
1635         /**
1636          * Use PHP's magic __call handler to intercept legacy calls to the linker
1637          * for backwards compatibility.
1638          *
1639          * @param string $fname Name of called method
1640          * @param array $args Arguments to the method
1641          * @throws MWException
1642          * @return mixed
1643          */
1644         function __call( $fname, $args ) {
1645                 $realFunction = array( 'Linker', $fname );
1646                 if ( is_callable( $realFunction ) ) {
1647                         wfDeprecated( get_class( $this ) . '::' . $fname, '1.21' );
1648                         return call_user_func_array( $realFunction, $args );
1649                 } else {
1650                         $className = get_class( $this );
1651                         throw new MWException( "Call to undefined method $className::$fname" );
1652                 }
1653         }
1654
1655 }