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          * @var string Stylesheets set to use. Subdirectory in skins/ where various stylesheets are
  41          *   located. Only needs to be set if you intend to use the getSkinStylePath() method.
  42          */
  43         public $stylename = null;
  44
  45         /**
  46          * Fetch the set of available skins.
  47          * @return array Associative array of strings
  48          */
  49         static function getSkinNames() {
  50                 global $wgValidSkinNames;
  51                 static $skinsInitialised = false;
  52
  53                 if ( !$skinsInitialised || !count( $wgValidSkinNames ) ) {
  54                         # Get a list of available skins
  55                         # Build using the regular expression '^(.*).php$'
  56                         # Array keys are all lower case, array value keep the case used by filename
  57                         #
  58                         wfProfileIn( __METHOD__ . '-init' );
  59
  60                         global $wgStyleDirectory;
  61
  62                         $skinDir = dir( $wgStyleDirectory );
  63
  64                         if ( $skinDir !== false && $skinDir !== null ) {
  65                                 # while code from www.php.net
  66                                 while ( false !== ( $file = $skinDir->read() ) ) {
  67                                         // Skip non-PHP files, hidden files, and '.dep' includes
  68                                         $matches = array();
  69
  70                                         if ( preg_match( '/^([^.]*)\.php$/', $file, $matches ) ) {
  71                                                 $aSkin = $matches[1];
  72
  73                                                 // Explicitly disallow loading core skins via the autodiscovery mechanism.
  74                                                 //
  75                                                 // They should be loaded already (in a non-autodicovery way), but old files might still
  76                                                 // exist on the server because our MW version upgrade process is widely documented as
  77                                                 // requiring just copying over all files, without removing old ones.
  78                                                 //
  79                                                 // This is one of the reasons we should have never used autodiscovery in the first
  80                                                 // place. This hack can be safely removed when autodiscovery is gone.
  81                                                 if ( in_array( $aSkin, array( 'CologneBlue', 'Modern', 'MonoBook', 'Vector' ) ) ) {
  82                                                         wfLogWarning(
  83                                                                 "An old copy of the $aSkin skin was found in your skins/ directory. " .
  84                                                                 "You should remove it to avoid problems in the future." .
  85                                                                 "See https://www.mediawiki.org/wiki/Manual:Skin_autodiscovery for details."
  86                                                         );
  87                                                         continue;
  88                                                 }
  89
  90                                                 wfLogWarning(
  91                                                         "A skin using autodiscovery mechanism, $aSkin, was found in your skins/ directory. " .
  92                                                         "The mechanism will be removed in MediaWiki 1.25 and the skin will no longer be recognized. " .
  93                                                         "See https://www.mediawiki.org/wiki/Manual:Skin_autodiscovery for information how to fix this."
  94                                                 );
  95                                                 $wgValidSkinNames[strtolower( $aSkin )] = $aSkin;
  96                                         }
  97                                 }
  98                                 $skinDir->close();
  99                         }
 100                         $skinsInitialised = true;
 101                         wfProfileOut( __METHOD__ . '-init' );
 102                 }
 103                 return $wgValidSkinNames;
 104         }
 105
 106         /**
 107          * Fetch the skinname messages for available skins.
 108          * @return string[]
 109          */
 110         static function getSkinNameMessages() {
 111                 $messages = array();
 112                 foreach ( self::getSkinNames() as $skinKey => $skinName ) {
 113                         $messages[] = "skinname-$skinKey";
 114                 }
 115                 return $messages;
 116         }
 117
 118         /**
 119          * Fetch the list of user-selectable skins in regards to $wgSkipSkins.
 120          * Useful for Special:Preferences and other places where you
 121          * only want to show skins users _can_ use.
 122          * @return string[]
 123          * @since 1.23
 124          */
 125         public static function getAllowedSkins() {
 126                 global $wgSkipSkins;
 127
 128                 $allowedSkins = self::getSkinNames();
 129
 130                 foreach ( $wgSkipSkins as $skip ) {
 131                         unset( $allowedSkins[$skip] );
 132                 }
 133
 134                 return $allowedSkins;
 135         }
 136
 137         /**
 138          * @deprecated since 1.23, use getAllowedSkins
 139          * @return string[]
 140          */
 141         public static function getUsableSkins() {
 142                 wfDeprecated( __METHOD__, '1.23' );
 143                 return self::getAllowedSkins();
 144         }
 145
 146         /**
 147          * Normalize a skin preference value to a form that can be loaded.
 148          * If a skin can't be found, it will fall back to the configured
 149          * default, or the hardcoded default if that's broken.
 150          * @param string $key 'monobook', 'vector', etc.
 151          * @return string
 152          */
 153         static function normalizeKey( $key ) {
 154                 global $wgDefaultSkin;
 155
 156                 $skinNames = Skin::getSkinNames();
 157
 158                 if ( $key == '' || $key == 'default' ) {
 159                         // Don't return the default immediately;
 160                         // in a misconfiguration we need to fall back.
 161                         $key = $wgDefaultSkin;
 162                 }
 163
 164                 if ( isset( $skinNames[$key] ) ) {
 165                         return $key;
 166                 }
 167
 168                 // Older versions of the software used a numeric setting
 169                 // in the user preferences.
 170                 $fallback = array(
 171                         0 => $wgDefaultSkin,
 172                         2 => 'cologneblue'
 173                 );
 174
 175                 if ( isset( $fallback[$key] ) ) {
 176                         $key = $fallback[$key];
 177                 }
 178
 179                 if ( isset( $skinNames[$key] ) ) {
 180                         return $key;
 181                 } elseif ( isset( $skinNames[$wgDefaultSkin] ) ) {
 182                         return $wgDefaultSkin;
 183                 } else {
 184                         return 'vector';
 185                 }
 186         }
 187
 188         /**
 189          * Factory method for loading a skin of a given type
 190          * @param string $key 'monobook', 'vector', etc.
 191          * @return Skin
 192          */
 193         static function &newFromKey( $key ) {
 194                 global $wgStyleDirectory;
 195
 196                 $key = Skin::normalizeKey( $key );
 197
 198                 $skinNames = Skin::getSkinNames();
 199                 $skinName = $skinNames[$key];
 200                 $className = "Skin{$skinName}";
 201
 202                 # Grab the skin class and initialise it.
 203                 if ( !class_exists( $className ) ) {
 204
 205                         require_once "{$wgStyleDirectory}/{$skinName}.php";
 206
 207                         # Check if we got if not fallback to default skin
 208                         if ( !class_exists( $className ) ) {
 209                                 # DO NOT die if the class isn't found. This breaks maintenance
 210                                 # scripts and can cause a user account to be unrecoverable
 211                                 # except by SQL manipulation if a previously valid skin name
 212                                 # is no longer valid.
 213                                 wfDebug( "Skin class does not exist: $className\n" );
 214                                 $className = 'SkinVector';
 215                         }
 216                 }
 217                 $skin = new $className( $key );
 218                 return $skin;
 219         }
 220
 221         /**
 222          * @return string Skin name
 223          */
 224         public function getSkinName() {
 225                 return $this->skinname;
 226         }
 227
 228         /**
 229          * @param OutputPage $out
 230          */
 231         function initPage( OutputPage $out ) {
 232                 wfProfileIn( __METHOD__ );
 233
 234                 $this->preloadExistence();
 235
 236                 wfProfileOut( __METHOD__ );
 237         }
 238
 239         /**
 240          * Defines the ResourceLoader modules that should be added to the skin
 241          * It is recommended that skins wishing to override call parent::getDefaultModules()
 242          * and substitute out any modules they wish to change by using a key to look them up
 243          * @return array Array of modules with helper keys for easy overriding
 244          */
 245         public function getDefaultModules() {
 246                 global $wgIncludeLegacyJavaScript, $wgPreloadJavaScriptMwUtil, $wgUseAjax,
 247                         $wgAjaxWatch, $wgEnableAPI, $wgEnableWriteAPI;
 248
 249                 $out = $this->getOutput();
 250                 $user = $out->getUser();
 251                 $modules = array(
 252                         // modules that enhance the page content in some way
 253                         'content' => array(
 254                                 'mediawiki.page.ready',
 255                         ),
 256                         // modules that exist for legacy reasons
 257                         'legacy' => array(),
 258                         // modules relating to search functionality
 259                         'search' => array(),
 260                         // modules relating to functionality relating to watching an article
 261                         'watch' => array(),
 262                         // modules which relate to the current users preferences
 263                         'user' => array(),
 264                 );
 265                 if ( $wgIncludeLegacyJavaScript ) {
 266                         $modules['legacy'][] = 'mediawiki.legacy.wikibits';
 267                 }
 268
 269                 if ( $wgPreloadJavaScriptMwUtil ) {
 270                         $modules['legacy'][] = 'mediawiki.util';
 271                 }
 272
 273                 // Add various resources if required
 274                 if ( $wgUseAjax ) {
 275                         $modules['legacy'][] = 'mediawiki.legacy.ajax';
 276
 277                         if ( $wgEnableAPI ) {
 278                                 if ( $wgEnableWriteAPI && $wgAjaxWatch && $user->isLoggedIn()
 279                                         && $user->isAllowed( 'writeapi' )
 280                                 ) {
 281                                         $modules['watch'][] = 'mediawiki.page.watch.ajax';
 282                                 }
 283
 284                                 $modules['search'][] = 'mediawiki.searchSuggest';
 285                         }
 286                 }
 287
 288                 if ( $user->getBoolOption( 'editsectiononrightclick' ) ) {
 289                         $modules['user'][] = 'mediawiki.action.view.rightClickEdit';
 290                 }
 291
 292                 // Crazy edit-on-double-click stuff
 293                 if ( $out->isArticle() && $user->getOption( 'editondblclick' ) ) {
 294                         $modules['user'][] = 'mediawiki.action.view.dblClickEdit';
 295                 }
 296                 return $modules;
 297         }
 298
 299         /**
 300          * Preload the existence of three commonly-requested pages in a single query
 301          */
 302         function preloadExistence() {
 303                 $user = $this->getUser();
 304
 305                 // User/talk link
 306                 $titles = array( $user->getUserPage(), $user->getTalkPage() );
 307
 308                 // Other tab link
 309                 if ( $this->getTitle()->isSpecialPage() ) {
 310                         // nothing
 311                 } elseif ( $this->getTitle()->isTalkPage() ) {
 312                         $titles[] = $this->getTitle()->getSubjectPage();
 313                 } else {
 314                         $titles[] = $this->getTitle()->getTalkPage();
 315                 }
 316
 317                 $lb = new LinkBatch( $titles );
 318                 $lb->setCaller( __METHOD__ );
 319                 $lb->execute();
 320         }
 321
 322         /**
 323          * Get the current revision ID
 324          *
 325          * @return int
 326          */
 327         public function getRevisionId() {
 328                 return $this->getOutput()->getRevisionId();
 329         }
 330
 331         /**
 332          * Whether the revision displayed is the latest revision of the page
 333          *
 334          * @return bool
 335          */
 336         public function isRevisionCurrent() {
 337                 $revID = $this->getRevisionId();
 338                 return $revID == 0 || $revID == $this->getTitle()->getLatestRevID();
 339         }
 340
 341         /**
 342          * Set the "relevant" title
 343          * @see self::getRelevantTitle()
 344          * @param Title $t
 345          */
 346         public function setRelevantTitle( $t ) {
 347                 $this->mRelevantTitle = $t;
 348         }
 349
 350         /**
 351          * Return the "relevant" title.
 352          * A "relevant" title is not necessarily the actual title of the page.
 353          * Special pages like Special:MovePage use set the page they are acting on
 354          * as their "relevant" title, this allows the skin system to display things
 355          * such as content tabs which belong to to that page instead of displaying
 356          * a basic special page tab which has almost no meaning.
 357          *
 358          * @return Title
 359          */
 360         public function getRelevantTitle() {
 361                 if ( isset( $this->mRelevantTitle ) ) {
 362                         return $this->mRelevantTitle;
 363                 }
 364                 return $this->getTitle();
 365         }
 366
 367         /**
 368          * Set the "relevant" user
 369          * @see self::getRelevantUser()
 370          * @param User $u
 371          */
 372         public function setRelevantUser( $u ) {
 373                 $this->mRelevantUser = $u;
 374         }
 375
 376         /**
 377          * Return the "relevant" user.
 378          * A "relevant" user is similar to a relevant title. Special pages like
 379          * Special:Contributions mark the user which they are relevant to so that
 380          * things like the toolbox can display the information they usually are only
 381          * able to display on a user's userpage and talkpage.
 382          * @return User
 383          */
 384         public function getRelevantUser() {
 385                 if ( isset( $this->mRelevantUser ) ) {
 386                         return $this->mRelevantUser;
 387                 }
 388                 $title = $this->getRelevantTitle();
 389                 if ( $title->hasSubjectNamespace( NS_USER ) ) {
 390                         $rootUser = $title->getRootText();
 391                         if ( User::isIP( $rootUser ) ) {
 392                                 $this->mRelevantUser = User::newFromName( $rootUser, false );
 393                         } else {
 394                                 $user = User::newFromName( $rootUser, false );
 395                                 if ( $user && $user->isLoggedIn() ) {
 396                                         $this->mRelevantUser = $user;
 397                                 }
 398                         }
 399                         return $this->mRelevantUser;
 400                 }
 401                 return null;
 402         }
 403
 404         /**
 405          * Outputs the HTML generated by other functions.
 406          * @param OutputPage $out
 407          */
 408         abstract function outputPage( OutputPage $out = null );
 409
 410         /**
 411          * @param array $data
 412          * @return string
 413          */
 414         static function makeVariablesScript( $data ) {
 415                 if ( $data ) {
 416                         return Html::inlineScript(
 417                                 ResourceLoader::makeLoaderConditionalScript( ResourceLoader::makeConfigSetScript( $data ) )
 418                         );
 419                 } else {
 420                         return '';
 421                 }
 422         }
 423
 424         /**
 425          * Make a "<script>" tag containing global variables
 426          *
 427          * @deprecated since 1.19
 428          * @param mixed $unused
 429          * @return string HTML fragment
 430          */
 431         public static function makeGlobalVariablesScript( $unused ) {
 432                 global $wgOut;
 433
 434                 wfDeprecated( __METHOD__, '1.19' );
 435
 436                 return self::makeVariablesScript( $wgOut->getJSVars() );
 437         }
 438
 439         /**
 440          * Get the query to generate a dynamic stylesheet
 441          *
 442          * @return array
 443          */
 444         public static function getDynamicStylesheetQuery() {
 445                 global $wgSquidMaxage;
 446
 447                 return array(
 448                                 'action' => 'raw',
 449                                 'maxage' => $wgSquidMaxage,
 450                                 'usemsgcache' => 'yes',
 451                                 'ctype' => 'text/css',
 452                                 'smaxage' => $wgSquidMaxage,
 453                         );
 454         }
 455
 456         /**
 457          * Add skin specific stylesheets
 458          * Calling this method with an $out of anything but the same OutputPage
 459          * inside ->getOutput() is deprecated. The $out arg is kept
 460          * for compatibility purposes with skins.
 461          * @param OutputPage $out
 462          * @todo delete
 463          */
 464         abstract function setupSkinUserCss( OutputPage $out );
 465
 466         /**
 467          * TODO: document
 468          * @param Title $title
 469          * @return string
 470          */
 471         function getPageClasses( $title ) {
 472                 $numeric = 'ns-' . $title->getNamespace();
 473
 474                 if ( $title->isSpecialPage() ) {
 475                         $type = 'ns-special';
 476                         // bug 23315: provide a class based on the canonical special page name without subpages
 477                         list( $canonicalName ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );
 478                         if ( $canonicalName ) {
 479                                 $type .= ' ' . Sanitizer::escapeClass( "mw-special-$canonicalName" );
 480                         } else {
 481                                 $type .= ' mw-invalidspecialpage';
 482                         }
 483                 } elseif ( $title->isTalkPage() ) {
 484                         $type = 'ns-talk';
 485                 } else {
 486                         $type = 'ns-subject';
 487                 }
 488
 489                 $name = Sanitizer::escapeClass( 'page-' . $title->getPrefixedText() );
 490
 491                 return "$numeric $type $name";
 492         }
 493
 494         /*
 495          * Return values for <html> element
 496          * @return array of associative name-to-value elements for <html> element
 497          */
 498         public function getHtmlElementAttributes() {
 499                 $lang = $this->getLanguage();
 500                 return array(
 501                         'lang' => $lang->getHtmlCode(),
 502                         'dir' => $lang->getDir(),
 503                         'class' => 'client-nojs',
 504                 );
 505         }
 506
 507         /**
 508          * This will be called by OutputPage::headElement when it is creating the
 509          * "<body>" tag, skins can override it if they have a need to add in any
 510          * body attributes or classes of their own.
 511          * @param OutputPage $out
 512          * @param array $bodyAttrs
 513          */
 514         function addToBodyAttributes( $out, &$bodyAttrs ) {
 515                 // does nothing by default
 516         }
 517
 518         /**
 519          * URL to the logo
 520          * @return string
 521          */
 522         function getLogo() {
 523                 global $wgLogo;
 524                 return $wgLogo;
 525         }
 526
 527         /**
 528          * @return string
 529          */
 530         function getCategoryLinks() {
 531                 global $wgUseCategoryBrowser;
 532
 533                 $out = $this->getOutput();
 534                 $allCats = $out->getCategoryLinks();
 535
 536                 if ( !count( $allCats ) ) {
 537                         return '';
 538                 }
 539
 540                 $embed = "<li>";
 541                 $pop = "</li>";
 542
 543                 $s = '';
 544                 $colon = $this->msg( 'colon-separator' )->escaped();
 545
 546                 if ( !empty( $allCats['normal'] ) ) {
 547                         $t = $embed . implode( "{$pop}{$embed}", $allCats['normal'] ) . $pop;
 548
 549                         $msg = $this->msg( 'pagecategories' )->numParams( count( $allCats['normal'] ) )->escaped();
 550                         $linkPage = wfMessage( 'pagecategorieslink' )->inContentLanguage()->text();
 551                         $s .= '<div id="mw-normal-catlinks" class="mw-normal-catlinks">' .
 552                                 Linker::link( Title::newFromText( $linkPage ), $msg )
 553                                 . $colon . '<ul>' . $t . '</ul>' . '</div>';
 554                 }
 555
 556                 # Hidden categories
 557                 if ( isset( $allCats['hidden'] ) ) {
 558                         if ( $this->getUser()->getBoolOption( 'showhiddencats' ) ) {
 559                                 $class = ' mw-hidden-cats-user-shown';
 560                         } elseif ( $this->getTitle()->getNamespace() == NS_CATEGORY ) {
 561                                 $class = ' mw-hidden-cats-ns-shown';
 562                         } else {
 563                                 $class = ' mw-hidden-cats-hidden';
 564                         }
 565
 566                         $s .= "<div id=\"mw-hidden-catlinks\" class=\"mw-hidden-catlinks$class\">" .
 567                                 $this->msg( 'hidden-categories' )->numParams( count( $allCats['hidden'] ) )->escaped() .
 568                                 $colon . '<ul>' . $embed . implode( "{$pop}{$embed}", $allCats['hidden'] ) . $pop . '</ul>' .
 569                                 '</div>';
 570                 }
 571
 572                 # optional 'dmoz-like' category browser. Will be shown under the list
 573                 # of categories an article belong to
 574                 if ( $wgUseCategoryBrowser ) {
 575                         $s .= '<br /><hr />';
 576
 577                         # get a big array of the parents tree
 578                         $parenttree = $this->getTitle()->getParentCategoryTree();
 579                         # Skin object passed by reference cause it can not be
 580                         # accessed under the method subfunction drawCategoryBrowser
 581                         $tempout = explode( "\n", $this->drawCategoryBrowser( $parenttree ) );
 582                         # Clean out bogus first entry and sort them
 583                         unset( $tempout[0] );
 584                         asort( $tempout );
 585                         # Output one per line
 586                         $s .= implode( "<br />\n", $tempout );
 587                 }
 588
 589                 return $s;
 590         }
 591
 592         /**
 593          * Render the array as a series of links.
 594          * @param array $tree Categories tree returned by Title::getParentCategoryTree
 595          * @return string Separated by &gt;, terminate with "\n"
 596          */
 597         function drawCategoryBrowser( $tree ) {
 598                 $return = '';
 599
 600                 foreach ( $tree as $element => $parent ) {
 601                         if ( empty( $parent ) ) {
 602                                 # element start a new list
 603                                 $return .= "\n";
 604                         } else {
 605                                 # grab the others elements
 606                                 $return .= $this->drawCategoryBrowser( $parent ) . ' &gt; ';
 607                         }
 608
 609                         # add our current element to the list
 610                         $eltitle = Title::newFromText( $element );
 611                         $return .= Linker::link( $eltitle, htmlspecialchars( $eltitle->getText() ) );
 612                 }
 613
 614                 return $return;
 615         }
 616
 617         /**
 618          * @return string
 619          */
 620         function getCategories() {
 621                 $out = $this->getOutput();
 622
 623                 $catlinks = $this->getCategoryLinks();
 624
 625                 $classes = 'catlinks';
 626
 627                 // Check what we're showing
 628                 $allCats = $out->getCategoryLinks();
 629                 $showHidden = $this->getUser()->getBoolOption( 'showhiddencats' ) ||
 630                                                 $this->getTitle()->getNamespace() == NS_CATEGORY;
 631
 632                 if ( empty( $allCats['normal'] ) && !( !empty( $allCats['hidden'] ) && $showHidden ) ) {
 633                         $classes .= ' catlinks-allhidden';
 634                 }
 635
 636                 return "<div id='catlinks' class='$classes'>{$catlinks}</div>";
 637         }
 638
 639         /**
 640          * This runs a hook to allow extensions placing their stuff after content
 641          * and article metadata (e.g. categories).
 642          * Note: This function has nothing to do with afterContent().
 643          *
 644          * This hook is placed here in order to allow using the same hook for all
 645          * skins, both the SkinTemplate based ones and the older ones, which directly
 646          * use this class to get their data.
 647          *
 648          * The output of this function gets processed in SkinTemplate::outputPage() for
 649          * the SkinTemplate based skins, all other skins should directly echo it.
 650          *
 651          * @return string Empty by default, if not changed by any hook function.
 652          */
 653         protected function afterContentHook() {
 654                 $data = '';
 655
 656                 if ( wfRunHooks( 'SkinAfterContent', array( &$data, $this ) ) ) {
 657                         // adding just some spaces shouldn't toggle the output
 658                         // of the whole <div/>, so we use trim() here
 659                         if ( trim( $data ) != '' ) {
 660                                 // Doing this here instead of in the skins to
 661                                 // ensure that the div has the same ID in all
 662                                 // skins
 663                                 $data = "<div id='mw-data-after-content'>\n" .
 664                                         "\t$data\n" .
 665                                         "</div>\n";
 666                         }
 667                 } else {
 668                         wfDebug( "Hook SkinAfterContent changed output processing.\n" );
 669                 }
 670
 671                 return $data;
 672         }
 673
 674         /**
 675          * Generate debug data HTML for displaying at the bottom of the main content
 676          * area.
 677          * @return string HTML containing debug data, if enabled (otherwise empty).
 678          */
 679         protected function generateDebugHTML() {
 680                 return MWDebug::getHTMLDebugLog();
 681         }
 682
 683         /**
 684          * This gets called shortly before the "</body>" tag.
 685          *
 686          * @return string HTML-wrapped JS code to be put before "</body>"
 687          */
 688         function bottomScripts() {
 689                 // TODO and the suckage continues. This function is really just a wrapper around
 690                 // OutputPage::getBottomScripts() which takes a Skin param. This should be cleaned
 691                 // up at some point
 692                 $bottomScriptText = $this->getOutput()->getBottomScripts();
 693                 wfRunHooks( 'SkinAfterBottomScripts', array( $this, &$bottomScriptText ) );
 694
 695                 return $bottomScriptText;
 696         }
 697
 698         /**
 699          * Text with the permalink to the source page,
 700          * usually shown on the footer of a printed page
 701          *
 702          * @return string HTML text with an URL
 703          */
 704         function printSource() {
 705                 $oldid = $this->getRevisionId();
 706                 if ( $oldid ) {
 707                         $canonicalUrl = $this->getTitle()->getCanonicalURL( 'oldid=' . $oldid );
 708                         $url = htmlspecialchars( wfExpandIRI( $canonicalUrl ) );
 709                 } else {
 710                         // oldid not available for non existing pages
 711                         $url = htmlspecialchars( wfExpandIRI( $this->getTitle()->getCanonicalURL() ) );
 712                 }
 713
 714                 return $this->msg( 'retrievedfrom', '<a dir="ltr" href="' . $url
 715                         . '">' . $url . '</a>' )->text();
 716         }
 717
 718         /**
 719          * @return string
 720          */
 721         function getUndeleteLink() {
 722                 $action = $this->getRequest()->getVal( 'action', 'view' );
 723
 724                 if ( $this->getUser()->isAllowed( 'deletedhistory' ) &&
 725                         ( $this->getTitle()->getArticleID() == 0 || $action == 'history' ) ) {
 726                         $n = $this->getTitle()->isDeleted();
 727
 728                         if ( $n ) {
 729                                 if ( $this->getUser()->isAllowed( 'undelete' ) ) {
 730                                         $msg = 'thisisdeleted';
 731                                 } else {
 732                                         $msg = 'viewdeleted';
 733                                 }
 734
 735                                 return $this->msg( $msg )->rawParams(
 736                                         Linker::linkKnown(
 737                                                 SpecialPage::getTitleFor( 'Undelete', $this->getTitle()->getPrefixedDBkey() ),
 738                                                 $this->msg( 'restorelink' )->numParams( $n )->escaped() )
 739                                         )->text();
 740                         }
 741                 }
 742
 743                 return '';
 744         }
 745
 746         /**
 747          * @return string
 748          */
 749         function subPageSubtitle() {
 750                 $out = $this->getOutput();
 751                 $subpages = '';
 752
 753                 if ( !wfRunHooks( 'SkinSubPageSubtitle', array( &$subpages, $this, $out ) ) ) {
 754                         return $subpages;
 755                 }
 756
 757                 if ( $out->isArticle() && MWNamespace::hasSubpages( $out->getTitle()->getNamespace() ) ) {
 758                         $ptext = $this->getTitle()->getPrefixedText();
 759                         if ( preg_match( '/\//', $ptext ) ) {
 760                                 $links = explode( '/', $ptext );
 761                                 array_pop( $links );
 762                                 $c = 0;
 763                                 $growinglink = '';
 764                                 $display = '';
 765                                 $lang = $this->getLanguage();
 766
 767                                 foreach ( $links as $link ) {
 768                                         $growinglink .= $link;
 769                                         $display .= $link;
 770                                         $linkObj = Title::newFromText( $growinglink );
 771
 772                                         if ( is_object( $linkObj ) && $linkObj->isKnown() ) {
 773                                                 $getlink = Linker::linkKnown(
 774                                                         $linkObj,
 775                                                         htmlspecialchars( $display )
 776                                                 );
 777
 778                                                 $c++;
 779
 780                                                 if ( $c > 1 ) {
 781                                                         $subpages .= $lang->getDirMarkEntity() . $this->msg( 'pipe-separator' )->escaped();
 782                                                 } else {
 783                                                         $subpages .= '&lt; ';
 784                                                 }
 785
 786                                                 $subpages .= $getlink;
 787                                                 $display = '';
 788                                         } else {
 789                                                 $display .= '/';
 790                                         }
 791                                         $growinglink .= '/';
 792                                 }
 793                         }
 794                 }
 795
 796                 return $subpages;
 797         }
 798
 799         /**
 800          * Returns true if the IP should be shown in the header
 801          * @return bool
 802          */
 803         function showIPinHeader() {
 804                 global $wgShowIPinHeader;
 805                 return $wgShowIPinHeader && session_id() != '';
 806         }
 807
 808         /**
 809          * @return string
 810          */
 811         function getSearchLink() {
 812                 $searchPage = SpecialPage::getTitleFor( 'Search' );
 813                 return $searchPage->getLocalURL();
 814         }
 815
 816         /**
 817          * @return string
 818          */
 819         function escapeSearchLink() {
 820                 return htmlspecialchars( $this->getSearchLink() );
 821         }
 822
 823         /**
 824          * @param string $type
 825          * @return string
 826          */
 827         function getCopyright( $type = 'detect' ) {
 828                 global $wgRightsPage, $wgRightsUrl, $wgRightsText, $wgContLang;
 829
 830                 if ( $type == 'detect' ) {
 831                         if ( !$this->isRevisionCurrent()
 832                                 && !$this->msg( 'history_copyright' )->inContentLanguage()->isDisabled()
 833                         ) {
 834                                 $type = 'history';
 835                         } else {
 836                                 $type = 'normal';
 837                         }
 838                 }
 839
 840                 if ( $type == 'history' ) {
 841                         $msg = 'history_copyright';
 842                 } else {
 843                         $msg = 'copyright';
 844                 }
 845
 846                 if ( $wgRightsPage ) {
 847                         $title = Title::newFromText( $wgRightsPage );
 848                         $link = Linker::linkKnown( $title, $wgRightsText );
 849                 } elseif ( $wgRightsUrl ) {
 850                         $link = Linker::makeExternalLink( $wgRightsUrl, $wgRightsText );
 851                 } elseif ( $wgRightsText ) {
 852                         $link = $wgRightsText;
 853                 } else {
 854                         # Give up now
 855                         return '';
 856                 }
 857
 858                 // Allow for site and per-namespace customization of copyright notice.
 859                 // @todo Remove deprecated $forContent param from hook handlers and then remove here.
 860                 $forContent = true;
 861
 862                 wfRunHooks(
 863                         'SkinCopyrightFooter',
 864                         array( $this->getTitle(), $type, &$msg, &$link, &$forContent )
 865                 );
 866
 867                 return $this->msg( $msg )->rawParams( $link )->text();
 868         }
 869
 870         /**
 871          * @return null|string
 872          */
 873         function getCopyrightIcon() {
 874                 global $wgRightsUrl, $wgRightsText, $wgRightsIcon, $wgCopyrightIcon;
 875
 876                 $out = '';
 877
 878                 if ( isset( $wgCopyrightIcon ) && $wgCopyrightIcon ) {
 879                         $out = $wgCopyrightIcon;
 880                 } elseif ( $wgRightsIcon ) {
 881                         $icon = htmlspecialchars( $wgRightsIcon );
 882
 883                         if ( $wgRightsUrl ) {
 884                                 $url = htmlspecialchars( $wgRightsUrl );
 885                                 $out .= '<a href="' . $url . '">';
 886                         }
 887
 888                         $text = htmlspecialchars( $wgRightsText );
 889                         $out .= "<img src=\"$icon\" alt=\"$text\" width=\"88\" height=\"31\" />";
 890
 891                         if ( $wgRightsUrl ) {
 892                                 $out .= '</a>';
 893                         }
 894                 }
 895
 896                 return $out;
 897         }
 898
 899         /**
 900          * Gets the powered by MediaWiki icon.
 901          * @return string
 902          */
 903         function getPoweredBy() {
 904                 global $wgStylePath;
 905
 906                 $url = htmlspecialchars( "$wgStylePath/common/images/poweredby_mediawiki_88x31.png" );
 907                 $text = '<a href="//www.mediawiki.org/"><img src="' . $url
 908                         . '" height="31" width="88" alt="Powered by MediaWiki" /></a>';
 909                 wfRunHooks( 'SkinGetPoweredBy', array( &$text, $this ) );
 910                 return $text;
 911         }
 912
 913         /**
 914          * Get the timestamp of the latest revision, formatted in user language
 915          *
 916          * @return string
 917          */
 918         protected function lastModified() {
 919                 $timestamp = $this->getOutput()->getRevisionTimestamp();
 920
 921                 # No cached timestamp, load it from the database
 922                 if ( $timestamp === null ) {
 923                         $timestamp = Revision::getTimestampFromId( $this->getTitle(), $this->getRevisionId() );
 924                 }
 925
 926                 if ( $timestamp ) {
 927                         $d = $this->getLanguage()->userDate( $timestamp, $this->getUser() );
 928                         $t = $this->getLanguage()->userTime( $timestamp, $this->getUser() );
 929                         $s = ' ' . $this->msg( 'lastmodifiedat', $d, $t )->text();
 930                 } else {
 931                         $s = '';
 932                 }
 933
 934                 if ( wfGetLB()->getLaggedSlaveMode() ) {
 935                         $s .= ' <strong>' . $this->msg( 'laggedslavemode' )->text() . '</strong>';
 936                 }
 937
 938                 return $s;
 939         }
 940
 941         /**
 942          * @param string $align
 943          * @return string
 944          */
 945         function logoText( $align = '' ) {
 946                 if ( $align != '' ) {
 947                         $a = " style='float: {$align};'";
 948                 } else {
 949                         $a = '';
 950                 }
 951
 952                 $mp = $this->msg( 'mainpage' )->escaped();
 953                 $mptitle = Title::newMainPage();
 954                 $url = ( is_object( $mptitle ) ? htmlspecialchars( $mptitle->getLocalURL() ) : '' );
 955
 956                 $logourl = $this->getLogo();
 957                 $s = "<a href='{$url}'><img{$a} src='{$logourl}' alt='[{$mp}]' /></a>";
 958
 959                 return $s;
 960         }
 961
 962         /**
 963          * Renders a $wgFooterIcons icon according to the method's arguments
 964          * @param array $icon The icon to build the html for, see $wgFooterIcons
 965          *   for the format of this array.
 966          * @param bool|string $withImage Whether to use the icon's image or output
 967          *   a text-only footericon.
 968          * @return string HTML
 969          */
 970         function makeFooterIcon( $icon, $withImage = 'withImage' ) {
 971                 if ( is_string( $icon ) ) {
 972                         $html = $icon;
 973                 } else { // Assuming array
 974                         $url = isset( $icon["url"] ) ? $icon["url"] : null;
 975                         unset( $icon["url"] );
 976                         if ( isset( $icon["src"] ) && $withImage === 'withImage' ) {
 977                                 // do this the lazy way, just pass icon data as an attribute array
 978                                 $html = Html::element( 'img', $icon );
 979                         } else {
 980                                 $html = htmlspecialchars( $icon["alt"] );
 981                         }
 982                         if ( $url ) {
 983                                 $html = Html::rawElement( 'a', array( "href" => $url ), $html );
 984                         }
 985                 }
 986                 return $html;
 987         }
 988
 989         /**
 990          * Gets the link to the wiki's main page.
 991          * @return string
 992          */
 993         function mainPageLink() {
 994                 $s = Linker::linkKnown(
 995                         Title::newMainPage(),
 996                         $this->msg( 'mainpage' )->escaped()
 997                 );
 998
 999                 return $s;
1000         }
1001
1002         /**
1003          * Returns an HTML link for use in the footer
1004          * @param string $desc i18n message key for the link text
1005          * @param string $page i18n message key for the page to link to
1006          * @return string HTML anchor
1007          */
1008         public function footerLink( $desc, $page ) {
1009                 // if the link description has been set to "-" in the default language,
1010                 if ( $this->msg( $desc )->inContentLanguage()->isDisabled() ) {
1011                         // then it is disabled, for all languages.
1012                         return '';
1013                 } else {
1014                         // Otherwise, we display the link for the user, described in their
1015                         // language (which may or may not be the same as the default language),
1016                         // but we make the link target be the one site-wide page.
1017                         $title = Title::newFromText( $this->msg( $page )->inContentLanguage()->text() );
1018
1019                         return Linker::linkKnown(
1020                                 $title,
1021                                 $this->msg( $desc )->escaped()
1022                         );
1023                 }
1024         }
1025
1026         /**
1027          * Gets the link to the wiki's privacy policy page.
1028          * @return string HTML
1029          */
1030         function privacyLink() {
1031                 return $this->footerLink( 'privacy', 'privacypage' );
1032         }
1033
1034         /**
1035          * Gets the link to the wiki's about page.
1036          * @return string HTML
1037          */
1038         function aboutLink() {
1039                 return $this->footerLink( 'aboutsite', 'aboutpage' );
1040         }
1041
1042         /**
1043          * Gets the link to the wiki's general disclaimers page.
1044          * @return string HTML
1045          */
1046         function disclaimerLink() {
1047                 return $this->footerLink( 'disclaimers', 'disclaimerpage' );
1048         }
1049
1050         /**
1051          * Return URL options for the 'edit page' link.
1052          * This may include an 'oldid' specifier, if the current page view is such.
1053          *
1054          * @return array
1055          * @private
1056          */
1057         function editUrlOptions() {
1058                 $options = array( 'action' => 'edit' );
1059
1060                 if ( !$this->isRevisionCurrent() ) {
1061                         $options['oldid'] = intval( $this->getRevisionId() );
1062                 }
1063
1064                 return $options;
1065         }
1066
1067         /**
1068          * @param User|int $id
1069          * @return bool
1070          */
1071         function showEmailUser( $id ) {
1072                 if ( $id instanceof User ) {
1073                         $targetUser = $id;
1074                 } else {
1075                         $targetUser = User::newFromId( $id );
1076                 }
1077
1078                 # The sending user must have a confirmed email address and the target
1079                 # user must have a confirmed email address and allow emails from users.
1080                 return $this->getUser()->canSendEmail() &&
1081                         $targetUser->canReceiveEmail();
1082         }
1083
1084         /**
1085          * Return a fully resolved style path url to images or styles stored in the common folder.
1086          * This method returns a url resolved using the configured skin style path
1087          * and includes the style version inside of the url.
1088          * @param string $name The name or path of a skin resource file
1089          * @return string The fully resolved style path url including styleversion
1090          */
1091         function getCommonStylePath( $name ) {
1092                 global $wgStylePath, $wgStyleVersion;
1093                 return "$wgStylePath/common/$name?$wgStyleVersion";
1094         }
1095
1096         /**
1097          * Return a fully resolved style path url to images or styles stored in the current skins's folder.
1098          * This method returns a url resolved using the configured skin style path
1099          * and includes the style version inside of the url.
1100          *
1101          * Requires $stylename to be set, otherwise throws MWException.
1102          *
1103          * @param string $name The name or path of a skin resource file
1104          * @return string The fully resolved style path url including styleversion
1105          */
1106         function getSkinStylePath( $name ) {
1107                 global $wgStylePath, $wgStyleVersion;
1108
1109                 if ( $this->stylename === null ) {
1110                         $class = get_class( $this );
1111                         throw new MWException( "$class::\$stylename must be set to use getSkinStylePath()" );
1112                 }
1113
1114                 return "$wgStylePath/{$this->stylename}/$name?$wgStyleVersion";
1115         }
1116
1117         /* these are used extensively in SkinTemplate, but also some other places */
1118
1119         /**
1120          * @param string $urlaction
1121          * @return string
1122          */
1123         static function makeMainPageUrl( $urlaction = '' ) {
1124                 $title = Title::newMainPage();
1125                 self::checkTitle( $title, '' );
1126
1127                 return $title->getLocalURL( $urlaction );
1128         }
1129
1130         /**
1131          * Make a URL for a Special Page using the given query and protocol.
1132          *
1133          * If $proto is set to null, make a local URL. Otherwise, make a full
1134          * URL with the protocol specified.
1135          *
1136          * @param string $name Name of the Special page
1137          * @param string $urlaction Query to append
1138          * @param string|null $proto Protocol to use or null for a local URL
1139          * @return string
1140          */
1141         static function makeSpecialUrl( $name, $urlaction = '', $proto = null ) {
1142                 $title = SpecialPage::getSafeTitleFor( $name );
1143                 if ( is_null( $proto ) ) {
1144                         return $title->getLocalURL( $urlaction );
1145                 } else {
1146                         return $title->getFullURL( $urlaction, false, $proto );
1147                 }
1148         }
1149
1150         /**
1151          * @param string $name
1152          * @param string $subpage
1153          * @param string $urlaction
1154          * @return string
1155          */
1156         static function makeSpecialUrlSubpage( $name, $subpage, $urlaction = '' ) {
1157                 $title = SpecialPage::getSafeTitleFor( $name, $subpage );
1158                 return $title->getLocalURL( $urlaction );
1159         }
1160
1161         /**
1162          * @param string $name
1163          * @param string $urlaction
1164          * @return string
1165          */
1166         static function makeI18nUrl( $name, $urlaction = '' ) {
1167                 $title = Title::newFromText( wfMessage( $name )->inContentLanguage()->text() );
1168                 self::checkTitle( $title, $name );
1169                 return $title->getLocalURL( $urlaction );
1170         }
1171
1172         /**
1173          * @param string $name
1174          * @param string $urlaction
1175          * @return string
1176          */
1177         static function makeUrl( $name, $urlaction = '' ) {
1178                 $title = Title::newFromText( $name );
1179                 self::checkTitle( $title, $name );
1180
1181                 return $title->getLocalURL( $urlaction );
1182         }
1183
1184         /**
1185          * If url string starts with http, consider as external URL, else
1186          * internal
1187          * @param string $name
1188          * @return string URL
1189          */
1190         static function makeInternalOrExternalUrl( $name ) {
1191                 if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $name ) ) {
1192                         return $name;
1193                 } else {
1194                         return self::makeUrl( $name );
1195                 }
1196         }
1197
1198         /**
1199          * this can be passed the NS number as defined in Language.php
1200          * @param string $name
1201          * @param string $urlaction
1202          * @param int $namespace
1203          * @return string
1204          */
1205         static function makeNSUrl( $name, $urlaction = '', $namespace = NS_MAIN ) {
1206                 $title = Title::makeTitleSafe( $namespace, $name );
1207                 self::checkTitle( $title, $name );
1208
1209                 return $title->getLocalURL( $urlaction );
1210         }
1211
1212         /**
1213          * these return an array with the 'href' and boolean 'exists'
1214          * @param string $name
1215          * @param string $urlaction
1216          * @return array
1217          */
1218         static function makeUrlDetails( $name, $urlaction = '' ) {
1219                 $title = Title::newFromText( $name );
1220                 self::checkTitle( $title, $name );
1221
1222                 return array(
1223                         'href' => $title->getLocalURL( $urlaction ),
1224                         'exists' => $title->getArticleID() != 0,
1225                 );
1226         }
1227
1228         /**
1229          * Make URL details where the article exists (or at least it's convenient to think so)
1230          * @param string $name Article name
1231          * @param string $urlaction
1232          * @return array
1233          */
1234         static function makeKnownUrlDetails( $name, $urlaction = '' ) {
1235                 $title = Title::newFromText( $name );
1236                 self::checkTitle( $title, $name );
1237
1238                 return array(
1239                         'href' => $title->getLocalURL( $urlaction ),
1240                         'exists' => true
1241                 );
1242         }
1243
1244         /**
1245          * make sure we have some title to operate on
1246          *
1247          * @param Title $title
1248          * @param string $name
1249          */
1250         static function checkTitle( &$title, $name ) {
1251                 if ( !is_object( $title ) ) {
1252                         $title = Title::newFromText( $name );
1253                         if ( !is_object( $title ) ) {
1254                                 $title = Title::newFromText( '--error: link target missing--' );
1255                         }
1256                 }
1257         }
1258
1259         /**
1260          * Build an array that represents the sidebar(s), the navigation bar among them.
1261          *
1262          * BaseTemplate::getSidebar can be used to simplify the format and id generation in new skins.
1263          *
1264          * The format of the returned array is array( heading => content, ... ), where:
1265          * - heading is the heading of a navigation portlet. It is either:
1266          *   - magic string to be handled by the skins ('SEARCH' / 'LANGUAGES' / 'TOOLBOX' / ...)
1267          *   - a message name (e.g. 'navigation'), the message should be HTML-escaped by the skin
1268          *   - plain text, which should be HTML-escaped by the skin
1269          * - content is the contents of the portlet. It is either:
1270          *   - HTML text (<ul><li>...</li>...</ul>)
1271          *   - array of link data in a format accepted by BaseTemplate::makeListItem()
1272          *   - (for a magic string as a key, any value)
1273          *
1274          * Note that extensions can control the sidebar contents using the SkinBuildSidebar hook
1275          * and can technically insert anything in here; skin creators are expected to handle
1276          * values described above.
1277          *
1278          * @return array
1279          */
1280         function buildSidebar() {
1281                 global $wgMemc, $wgEnableSidebarCache, $wgSidebarCacheExpiry;
1282                 wfProfileIn( __METHOD__ );
1283
1284                 $key = wfMemcKey( 'sidebar', $this->getLanguage()->getCode() );
1285
1286                 if ( $wgEnableSidebarCache ) {
1287                         $cachedsidebar = $wgMemc->get( $key );
1288                         if ( $cachedsidebar ) {
1289                                 wfRunHooks( 'SidebarBeforeOutput', array( $this, &$cachedsidebar ) );
1290
1291                                 wfProfileOut( __METHOD__ );
1292                                 return $cachedsidebar;
1293                         }
1294                 }
1295
1296                 $bar = array();
1297                 $this->addToSidebar( $bar, 'sidebar' );
1298
1299                 wfRunHooks( 'SkinBuildSidebar', array( $this, &$bar ) );
1300                 if ( $wgEnableSidebarCache ) {
1301                         $wgMemc->set( $key, $bar, $wgSidebarCacheExpiry );
1302                 }
1303
1304                 wfRunHooks( 'SidebarBeforeOutput', array( $this, &$bar ) );
1305
1306                 wfProfileOut( __METHOD__ );
1307                 return $bar;
1308         }
1309
1310         /**
1311          * Add content from a sidebar system message
1312          * Currently only used for MediaWiki:Sidebar (but may be used by Extensions)
1313          *
1314          * This is just a wrapper around addToSidebarPlain() for backwards compatibility
1315          *
1316          * @param array $bar
1317          * @param string $message
1318          */
1319         function addToSidebar( &$bar, $message ) {
1320                 $this->addToSidebarPlain( $bar, wfMessage( $message )->inContentLanguage()->plain() );
1321         }
1322
1323         /**
1324          * Add content from plain text
1325          * @since 1.17
1326          * @param array $bar
1327          * @param string $text
1328          * @return array
1329          */
1330         function addToSidebarPlain( &$bar, $text ) {
1331                 $lines = explode( "\n", $text );
1332
1333                 $heading = '';
1334
1335                 foreach ( $lines as $line ) {
1336                         if ( strpos( $line, '*' ) !== 0 ) {
1337                                 continue;
1338                         }
1339                         $line = rtrim( $line, "\r" ); // for Windows compat
1340
1341                         if ( strpos( $line, '**' ) !== 0 ) {
1342                                 $heading = trim( $line, '* ' );
1343                                 if ( !array_key_exists( $heading, $bar ) ) {
1344                                         $bar[$heading] = array();
1345                                 }
1346                         } else {
1347                                 $line = trim( $line, '* ' );
1348
1349                                 if ( strpos( $line, '|' ) !== false ) { // sanity check
1350                                         $line = MessageCache::singleton()->transform( $line, false, null, $this->getTitle() );
1351                                         $line = array_map( 'trim', explode( '|', $line, 2 ) );
1352                                         if ( count( $line ) !== 2 ) {
1353                                                 // Second sanity check, could be hit by people doing
1354                                                 // funky stuff with parserfuncs... (bug 33321)
1355                                                 continue;
1356                                         }
1357
1358                                         $extraAttribs = array();
1359
1360                                         $msgLink = $this->msg( $line[0] )->inContentLanguage();
1361                                         if ( $msgLink->exists() ) {
1362                                                 $link = $msgLink->text();
1363                                                 if ( $link == '-' ) {
1364                                                         continue;
1365                                                 }
1366                                         } else {
1367                                                 $link = $line[0];
1368                                         }
1369                                         $msgText = $this->msg( $line[1] );
1370                                         if ( $msgText->exists() ) {
1371                                                 $text = $msgText->text();
1372                                         } else {
1373                                                 $text = $line[1];
1374                                         }
1375
1376                                         if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $link ) ) {
1377                                                 $href = $link;
1378
1379                                                 // Parser::getExternalLinkAttribs won't work here because of the Namespace things
1380                                                 global $wgNoFollowLinks, $wgNoFollowDomainExceptions;
1381                                                 if ( $wgNoFollowLinks && !wfMatchesDomainList( $href, $wgNoFollowDomainExceptions ) ) {
1382                                                         $extraAttribs['rel'] = 'nofollow';
1383                                                 }
1384
1385                                                 global $wgExternalLinkTarget;
1386                                                 if ( $wgExternalLinkTarget ) {
1387                                                         $extraAttribs['target'] = $wgExternalLinkTarget;
1388                                                 }
1389                                         } else {
1390                                                 $title = Title::newFromText( $link );
1391
1392                                                 if ( $title ) {
1393                                                         $title = $title->fixSpecialName();
1394                                                         $href = $title->getLinkURL();
1395                                                 } else {
1396                                                         $href = 'INVALID-TITLE';
1397                                                 }
1398                                         }
1399
1400                                         $bar[$heading][] = array_merge( array(
1401                                                 'text' => $text,
1402                                                 'href' => $href,
1403                                                 'id' => 'n-' . Sanitizer::escapeId( strtr( $line[1], ' ', '-' ), 'noninitial' ),
1404                                                 'active' => false
1405                                         ), $extraAttribs );
1406                                 } else {
1407                                         continue;
1408                                 }
1409                         }
1410                 }
1411
1412                 return $bar;
1413         }
1414
1415         /**
1416          * This function previously controlled whether the 'mediawiki.legacy.wikiprintable' module
1417          * should be loaded by OutputPage. That module no longer exists and the return value of this
1418          * method is ignored.
1419          *
1420          * If your skin doesn't provide its own print styles, the 'mediawiki.legacy.commonPrint' module
1421          * can be used instead (SkinTemplate-based skins do it automatically).
1422          *
1423          * @deprecated since 1.22
1424          * @return bool
1425          */
1426         public function commonPrintStylesheet() {
1427                 wfDeprecated( __METHOD__, '1.22' );
1428                 return false;
1429         }
1430
1431         /**
1432          * Gets new talk page messages for the current user and returns an
1433          * appropriate alert message (or an empty string if there are no messages)
1434          * @return string
1435          */
1436         function getNewtalks() {
1437
1438                 $newMessagesAlert = '';
1439                 $user = $this->getUser();
1440                 $newtalks = $user->getNewMessageLinks();
1441                 $out = $this->getOutput();
1442
1443                 // Allow extensions to disable or modify the new messages alert
1444                 if ( !wfRunHooks( 'GetNewMessagesAlert', array( &$newMessagesAlert, $newtalks, $user, $out ) ) ) {
1445                         return '';
1446                 }
1447                 if ( $newMessagesAlert ) {
1448                         return $newMessagesAlert;
1449                 }
1450
1451                 if ( count( $newtalks ) == 1 && $newtalks[0]['wiki'] === wfWikiID() ) {
1452                         $uTalkTitle = $user->getTalkPage();
1453                         $lastSeenRev = isset( $newtalks[0]['rev'] ) ? $newtalks[0]['rev'] : null;
1454                         $nofAuthors = 0;
1455                         if ( $lastSeenRev !== null ) {
1456                                 $plural = true; // Default if we have a last seen revision: if unknown, use plural
1457                                 $latestRev = Revision::newFromTitle( $uTalkTitle, false, Revision::READ_NORMAL );
1458                                 if ( $latestRev !== null ) {
1459                                         // Singular if only 1 unseen revision, plural if several unseen revisions.
1460                                         $plural = $latestRev->getParentId() !== $lastSeenRev->getId();
1461                                         $nofAuthors = $uTalkTitle->countAuthorsBetween(
1462                                                 $lastSeenRev, $latestRev, 10, 'include_new' );
1463                                 }
1464                         } else {
1465                                 // Singular if no revision -> diff link will show latest change only in any case
1466                                 $plural = false;
1467                         }
1468                         $plural = $plural ? 999 : 1;
1469                         // 999 signifies "more than one revision". We don't know how many, and even if we did,
1470                         // the number of revisions or authors is not necessarily the same as the number of
1471                         // "messages".
1472                         $newMessagesLink = Linker::linkKnown(
1473                                 $uTalkTitle,
1474                                 $this->msg( 'newmessageslinkplural' )->params( $plural )->escaped(),
1475                                 array(),
1476                                 array( 'redirect' => 'no' )
1477                         );
1478
1479                         $newMessagesDiffLink = Linker::linkKnown(
1480                                 $uTalkTitle,
1481                                 $this->msg( 'newmessagesdifflinkplural' )->params( $plural )->escaped(),
1482                                 array(),
1483                                 $lastSeenRev !== null
1484                                         ? array( 'oldid' => $lastSeenRev->getId(), 'diff' => 'cur' )
1485                                         : array( 'diff' => 'cur' )
1486                         );
1487
1488                         if ( $nofAuthors >= 1 && $nofAuthors <= 10 ) {
1489                                 $newMessagesAlert = $this->msg(
1490                                         'youhavenewmessagesfromusers',
1491                                         $newMessagesLink,
1492                                         $newMessagesDiffLink
1493                                 )->numParams( $nofAuthors, $plural );
1494                         } else {
1495                                 // $nofAuthors === 11 signifies "11 or more" ("more than 10")
1496                                 $newMessagesAlert = $this->msg(
1497                                         $nofAuthors > 10 ? 'youhavenewmessagesmanyusers' : 'youhavenewmessages',
1498                                         $newMessagesLink,
1499                                         $newMessagesDiffLink
1500                                 )->numParams( $plural );
1501                         }
1502                         $newMessagesAlert = $newMessagesAlert->text();
1503                         # Disable Squid cache
1504                         $out->setSquidMaxage( 0 );
1505                 } elseif ( count( $newtalks ) ) {
1506                         $sep = $this->msg( 'newtalkseparator' )->escaped();
1507                         $msgs = array();
1508
1509                         foreach ( $newtalks as $newtalk ) {
1510                                 $msgs[] = Xml::element(
1511                                         'a',
1512                                         array( 'href' => $newtalk['link'] ), $newtalk['wiki']
1513                                 );
1514                         }
1515                         $parts = implode( $sep, $msgs );
1516                         $newMessagesAlert = $this->msg( 'youhavenewmessagesmulti' )->rawParams( $parts )->escaped();
1517                         $out->setSquidMaxage( 0 );
1518                 }
1519
1520                 return $newMessagesAlert;
1521         }
1522
1523         /**
1524          * Get a cached notice
1525          *
1526          * @param string $name Message name, or 'default' for $wgSiteNotice
1527          * @return string HTML fragment
1528          */
1529         private function getCachedNotice( $name ) {
1530                 global $wgRenderHashAppend, $parserMemc, $wgContLang;
1531
1532                 wfProfileIn( __METHOD__ );
1533
1534                 $needParse = false;
1535
1536                 if ( $name === 'default' ) {
1537                         // special case
1538                         global $wgSiteNotice;
1539                         $notice = $wgSiteNotice;
1540                         if ( empty( $notice ) ) {
1541                                 wfProfileOut( __METHOD__ );
1542                                 return false;
1543                         }
1544                 } else {
1545                         $msg = $this->msg( $name )->inContentLanguage();
1546                         if ( $msg->isDisabled() ) {
1547                                 wfProfileOut( __METHOD__ );
1548                                 return false;
1549                         }
1550                         $notice = $msg->plain();
1551                 }
1552
1553                 // Use the extra hash appender to let eg SSL variants separately cache.
1554                 $key = wfMemcKey( $name . $wgRenderHashAppend );
1555                 $cachedNotice = $parserMemc->get( $key );
1556                 if ( is_array( $cachedNotice ) ) {
1557                         if ( md5( $notice ) == $cachedNotice['hash'] ) {
1558                                 $notice = $cachedNotice['html'];
1559                         } else {
1560                                 $needParse = true;
1561                         }
1562                 } else {
1563                         $needParse = true;
1564                 }
1565
1566                 if ( $needParse ) {
1567                         $parsed = $this->getOutput()->parse( $notice );
1568                         $parserMemc->set( $key, array( 'html' => $parsed, 'hash' => md5( $notice ) ), 600 );
1569                         $notice = $parsed;
1570                 }
1571
1572                 $notice = Html::rawElement( 'div', array( 'id' => 'localNotice',
1573                         'lang' => $wgContLang->getHtmlCode(), 'dir' => $wgContLang->getDir() ), $notice );
1574                 wfProfileOut( __METHOD__ );
1575                 return $notice;
1576         }
1577
1578         /**
1579          * Get a notice based on page's namespace
1580          *
1581          * @return string HTML fragment
1582          */
1583         function getNamespaceNotice() {
1584                 wfProfileIn( __METHOD__ );
1585
1586                 $key = 'namespacenotice-' . $this->getTitle()->getNsText();
1587                 $namespaceNotice = $this->getCachedNotice( $key );
1588                 if ( $namespaceNotice && substr( $namespaceNotice, 0, 7 ) != '<p>&lt;' ) {
1589                         $namespaceNotice = '<div id="namespacebanner">' . $namespaceNotice . '</div>';
1590                 } else {
1591                         $namespaceNotice = '';
1592                 }
1593
1594                 wfProfileOut( __METHOD__ );
1595                 return $namespaceNotice;
1596         }
1597
1598         /**
1599          * Get the site notice
1600          *
1601          * @return string HTML fragment
1602          */
1603         function getSiteNotice() {
1604                 wfProfileIn( __METHOD__ );
1605                 $siteNotice = '';
1606
1607                 if ( wfRunHooks( 'SiteNoticeBefore', array( &$siteNotice, $this ) ) ) {
1608                         if ( is_object( $this->getUser() ) && $this->getUser()->isLoggedIn() ) {
1609                                 $siteNotice = $this->getCachedNotice( 'sitenotice' );
1610                         } else {
1611                                 $anonNotice = $this->getCachedNotice( 'anonnotice' );
1612                                 if ( !$anonNotice ) {
1613                                         $siteNotice = $this->getCachedNotice( 'sitenotice' );
1614                                 } else {
1615                                         $siteNotice = $anonNotice;
1616                                 }
1617                         }
1618                         if ( !$siteNotice ) {
1619                                 $siteNotice = $this->getCachedNotice( 'default' );
1620                         }
1621                 }
1622
1623                 wfRunHooks( 'SiteNoticeAfter', array( &$siteNotice, $this ) );
1624                 wfProfileOut( __METHOD__ );
1625                 return $siteNotice;
1626         }
1627
1628         /**
1629          * Create a section edit link.  This supersedes editSectionLink() and
1630          * editSectionLinkForOther().
1631          *
1632          * @param Title $nt The title being linked to (may not be the same as
1633          *   the current page, if the section is included from a template)
1634          * @param string $section The designation of the section being pointed to,
1635          *   to be included in the link, like "&section=$section"
1636          * @param string $tooltip The tooltip to use for the link: will be escaped
1637          *   and wrapped in the 'editsectionhint' message
1638          * @param string $lang Language code
1639          * @return string HTML to use for edit link
1640          */
1641         public function doEditSectionLink( Title $nt, $section, $tooltip = null, $lang = false ) {
1642                 // HTML generated here should probably have userlangattributes
1643                 // added to it for LTR text on RTL pages
1644
1645                 $lang = wfGetLangObj( $lang );
1646
1647                 $attribs = array();
1648                 if ( !is_null( $tooltip ) ) {
1649                         # Bug 25462: undo double-escaping.
1650                         $tooltip = Sanitizer::decodeCharReferences( $tooltip );
1651                         $attribs['title'] = wfMessage( 'editsectionhint' )->rawParams( $tooltip )
1652                                 ->inLanguage( $lang )->text();
1653                 }
1654                 $link = Linker::link( $nt, wfMessage( 'editsection' )->inLanguage( $lang )->text(),
1655                         $attribs,
1656                         array( 'action' => 'edit', 'section' => $section ),
1657                         array( 'noclasses', 'known' )
1658                 );
1659
1660                 # Add the brackets and the span and run the hook.
1661                 $result = '<span class="mw-editsection">'
1662                         . '<span class="mw-editsection-bracket">[</span>'
1663                         . $link
1664                         . '<span class="mw-editsection-bracket">]</span>'
1665                         . '</span>';
1666
1667                 wfRunHooks( 'DoEditSectionLink', array( $this, $nt, $section, $tooltip, &$result, $lang ) );
1668                 return $result;
1669         }
1670
1671         /**
1672          * Use PHP's magic __call handler to intercept legacy calls to the linker
1673          * for backwards compatibility.
1674          *
1675          * @param string $fname Name of called method
1676          * @param array $args Arguments to the method
1677          * @throws MWException
1678          * @return mixed
1679          */
1680         function __call( $fname, $args ) {
1681                 $realFunction = array( 'Linker', $fname );
1682                 if ( is_callable( $realFunction ) ) {
1683                         wfDeprecated( get_class( $this ) . '::' . $fname, '1.21' );
1684                         return call_user_func_array( $realFunction, $args );
1685                 } else {
1686                         $className = get_class( $this );
1687                         throw new MWException( "Call to undefined method $className::$fname" );
1688                 }
1689         }
1690
1691 }