includes/Skin.php

   1 <?php
   2 /**
   3  * Base class for all skins.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * @defgroup Skins Skins
  25  */
  26
  27 /**
  28  * The main skin class which provides methods and properties for all other skins.
  29  * This base class is also the "Standard" skin.
  30  *
  31  * See docs/skin.txt for more information.
  32  *
  33  * @ingroup Skins
  34  */
  35 abstract class Skin extends ContextSource {
  36         protected $skinname = 'standard';
  37         protected $mRelevantTitle = null;
  38         protected $mRelevantUser = null;
  39
  40         /**
  41          * Fetch the set of available skins.
  42          * @return array Associative array of strings
  43          */
  44         static function getSkinNames() {
  45                 global $wgValidSkinNames;
  46                 static $skinsInitialised = false;
  47
  48                 if ( !$skinsInitialised || !count( $wgValidSkinNames ) ) {
  49                         # Get a list of available skins
  50                         # Build using the regular expression '^(.*).php$'
  51                         # Array keys are all lower case, array value keep the case used by filename
  52                         #
  53                         wfProfileIn( __METHOD__ . '-init' );
  54
  55                         global $wgStyleDirectory;
  56
  57                         $skinDir = dir( $wgStyleDirectory );
  58
  59                         if ( $skinDir !== false && $skinDir !== null ) {
  60                                 # while code from www.php.net
  61                                 while ( false !== ( $file = $skinDir->read() ) ) {
  62                                         // Skip non-PHP files, hidden files, and '.dep' includes
  63                                         $matches = array();
  64
  65                                         if ( preg_match( '/^([^.]*)\.php$/', $file, $matches ) ) {
  66                                                 $aSkin = $matches[1];
  67                                                 $wgValidSkinNames[strtolower( $aSkin )] = $aSkin;
  68                                         }
  69                                 }
  70                                 $skinDir->close();
  71                         }
  72                         $skinsInitialised = true;
  73                         wfProfileOut( __METHOD__ . '-init' );
  74                 }
  75                 return $wgValidSkinNames;
  76         }
  77
  78         /**
  79          * Fetch the skinname messages for available skins.
  80          * @return string[]
  81          */
  82         static function getSkinNameMessages() {
  83                 $messages = array();
  84                 foreach ( self::getSkinNames() as $skinKey => $skinName ) {
  85                         // Messages: skinname-cologneblue, skinname-monobook, skinname-modern, skinname-vector
  86                         $messages[] = "skinname-$skinKey";
  87                 }
  88                 return $messages;
  89         }
  90
  91         /**
  92          * Fetch the list of user-selectable skins in regards to $wgSkipSkins.
  93          * Useful for Special:Preferences and other places where you
  94          * only want to show skins users _can_ use.
  95          * @return string[]
  96          * @since 1.23
  97          */
  98         public static function getAllowedSkins() {
  99                 global $wgSkipSkins;
 100
 101                 $allowedSkins = self::getSkinNames();
 102
 103                 foreach ( $wgSkipSkins as $skip ) {
 104                         unset( $allowedSkins[$skip] );
 105                 }
 106
 107                 return $allowedSkins;
 108         }
 109
 110         /**
 111          * @deprecated since 1.23, use getAllowedSkins
 112          * @return string[]
 113          */
 114         public static function getUsableSkins() {
 115                 wfDeprecated( __METHOD__, '1.23' );
 116                 return self::getAllowedSkins();
 117         }
 118
 119         /**
 120          * Normalize a skin preference value to a form that can be loaded.
 121          * If a skin can't be found, it will fall back to the configured
 122          * default (or the old 'Classic' skin if that's broken).
 123          * @param string $key 'monobook', 'standard', etc.
 124          * @return string
 125          */
 126         static function normalizeKey( $key ) {
 127                 global $wgDefaultSkin;
 128
 129                 $skinNames = Skin::getSkinNames();
 130
 131                 if ( $key == '' || $key == 'default' ) {
 132                         // Don't return the default immediately;
 133                         // in a misconfiguration we need to fall back.
 134                         $key = $wgDefaultSkin;
 135                 }
 136
 137                 if ( isset( $skinNames[$key] ) ) {
 138                         return $key;
 139                 }
 140
 141                 // Older versions of the software used a numeric setting
 142                 // in the user preferences.
 143                 $fallback = array(
 144                         0 => $wgDefaultSkin,
 145                         2 => 'cologneblue'
 146                 );
 147
 148                 if ( isset( $fallback[$key] ) ) {
 149                         $key = $fallback[$key];
 150                 }
 151
 152                 if ( isset( $skinNames[$key] ) ) {
 153                         return $key;
 154                 } elseif ( isset( $skinNames[$wgDefaultSkin] ) ) {
 155                         return $wgDefaultSkin;
 156                 } else {
 157                         return 'vector';
 158                 }
 159         }
 160
 161         /**
 162          * Factory method for loading a skin of a given type
 163          * @param string $key 'monobook', 'standard', etc.
 164          * @return Skin
 165          */
 166         static function &newFromKey( $key ) {
 167                 global $wgStyleDirectory;
 168
 169                 $key = Skin::normalizeKey( $key );
 170
 171                 $skinNames = Skin::getSkinNames();
 172                 $skinName = $skinNames[$key];
 173                 $className = "Skin{$skinName}";
 174
 175                 # Grab the skin class and initialise it.
 176                 if ( !class_exists( $className ) ) {
 177
 178                         require_once "{$wgStyleDirectory}/{$skinName}.php";
 179
 180                         # Check if we got if not fallback to default skin
 181                         if ( !class_exists( $className ) ) {
 182                                 # DO NOT die if the class isn't found. This breaks maintenance
 183                                 # scripts and can cause a user account to be unrecoverable
 184                                 # except by SQL manipulation if a previously valid skin name
 185                                 # is no longer valid.
 186                                 wfDebug( "Skin class does not exist: $className\n" );
 187                                 $className = 'SkinVector';
 188                                 require_once "{$wgStyleDirectory}/Vector.php";
 189                         }
 190                 }
 191                 $skin = new $className( $key );
 192                 return $skin;
 193         }
 194
 195         /**
 196          * @return string Skin name
 197          */
 198         public function getSkinName() {
 199                 return $this->skinname;
 200         }
 201
 202         /**
 203          * @param OutputPage $out
 204          */
 205         function initPage( OutputPage $out ) {
 206                 wfProfileIn( __METHOD__ );
 207
 208                 $this->preloadExistence();
 209
 210                 wfProfileOut( __METHOD__ );
 211         }
 212
 213         /**
 214          * Defines the ResourceLoader modules that should be added to the skin
 215          * It is recommended that skins wishing to override call parent::getDefaultModules()
 216          * and substitute out any modules they wish to change by using a key to look them up
 217          * @return array Array of modules with helper keys for easy overriding
 218          */
 219         public function getDefaultModules() {
 220                 global $wgIncludeLegacyJavaScript, $wgPreloadJavaScriptMwUtil, $wgUseAjax,
 221                         $wgAjaxWatch, $wgEnableAPI, $wgEnableWriteAPI;
 222
 223                 $out = $this->getOutput();
 224                 $user = $out->getUser();
 225                 $modules = array(
 226                         // modules that enhance the page content in some way
 227                         'content' => array(
 228                                 'mediawiki.page.ready',
 229                         ),
 230                         // modules that exist for legacy reasons
 231                         'legacy' => array(),
 232                         // modules relating to search functionality
 233                         'search' => array(),
 234                         // modules relating to functionality relating to watching an article
 235                         'watch' => array(),
 236                         // modules which relate to the current users preferences
 237                         'user' => array(),
 238                 );
 239                 if ( $wgIncludeLegacyJavaScript ) {
 240                         $modules['legacy'][] = 'mediawiki.legacy.wikibits';
 241                 }
 242
 243                 if ( $wgPreloadJavaScriptMwUtil ) {
 244                         $modules['legacy'][] = 'mediawiki.util';
 245                 }
 246
 247                 // Add various resources if required
 248                 if ( $wgUseAjax ) {
 249                         $modules['legacy'][] = 'mediawiki.legacy.ajax';
 250
 251                         if ( $wgEnableAPI ) {
 252                                 if ( $wgEnableWriteAPI && $wgAjaxWatch && $user->isLoggedIn()
 253                                         && $user->isAllowed( 'writeapi' )
 254                                 ) {
 255                                         $modules['watch'][] = 'mediawiki.page.watch.ajax';
 256                                 }
 257
 258                                 $modules['search'][] = 'mediawiki.searchSuggest';
 259                         }
 260                 }
 261
 262                 if ( $user->getBoolOption( 'editsectiononrightclick' ) ) {
 263                         $modules['user'][] = 'mediawiki.action.view.rightClickEdit';
 264                 }
 265
 266                 // Crazy edit-on-double-click stuff
 267                 if ( $out->isArticle() && $user->getOption( 'editondblclick' ) ) {
 268                         $modules['user'][] = 'mediawiki.action.view.dblClickEdit';
 269                 }
 270                 return $modules;
 271         }
 272
 273         /**
 274          * Preload the existence of three commonly-requested pages in a single query
 275          */
 276         function preloadExistence() {
 277                 $user = $this->getUser();
 278
 279                 // User/talk link
 280                 $titles = array( $user->getUserPage(), $user->getTalkPage() );
 281
 282                 // Other tab link
 283                 if ( $this->getTitle()->isSpecialPage() ) {
 284                         // nothing
 285                 } elseif ( $this->getTitle()->isTalkPage() ) {
 286                         $titles[] = $this->getTitle()->getSubjectPage();
 287                 } else {
 288                         $titles[] = $this->getTitle()->getTalkPage();
 289                 }
 290
 291                 $lb = new LinkBatch( $titles );
 292                 $lb->setCaller( __METHOD__ );
 293                 $lb->execute();
 294         }
 295
 296         /**
 297          * Get the current revision ID
 298          *
 299          * @return int
 300          */
 301         public function getRevisionId() {
 302                 return $this->getOutput()->getRevisionId();
 303         }
 304
 305         /**
 306          * Whether the revision displayed is the latest revision of the page
 307          *
 308          * @return bool
 309          */
 310         public function isRevisionCurrent() {
 311                 $revID = $this->getRevisionId();
 312                 return $revID == 0 || $revID == $this->getTitle()->getLatestRevID();
 313         }
 314
 315         /**
 316          * Set the "relevant" title
 317          * @see self::getRelevantTitle()
 318          * @param Title $t
 319          */
 320         public function setRelevantTitle( $t ) {
 321                 $this->mRelevantTitle = $t;
 322         }
 323
 324         /**
 325          * Return the "relevant" title.
 326          * A "relevant" title is not necessarily the actual title of the page.
 327          * Special pages like Special:MovePage use set the page they are acting on
 328          * as their "relevant" title, this allows the skin system to display things
 329          * such as content tabs which belong to to that page instead of displaying
 330          * a basic special page tab which has almost no meaning.
 331          *
 332          * @return Title
 333          */
 334         public function getRelevantTitle() {
 335                 if ( isset( $this->mRelevantTitle ) ) {
 336                         return $this->mRelevantTitle;
 337                 }
 338                 return $this->getTitle();
 339         }
 340
 341         /**
 342          * Set the "relevant" user
 343          * @see self::getRelevantUser()
 344          * @param User $u
 345          */
 346         public function setRelevantUser( $u ) {
 347                 $this->mRelevantUser = $u;
 348         }
 349
 350         /**
 351          * Return the "relevant" user.
 352          * A "relevant" user is similar to a relevant title. Special pages like
 353          * Special:Contributions mark the user which they are relevant to so that
 354          * things like the toolbox can display the information they usually are only
 355          * able to display on a user's userpage and talkpage.
 356          * @return User
 357          */
 358         public function getRelevantUser() {
 359                 if ( isset( $this->mRelevantUser ) ) {
 360                         return $this->mRelevantUser;
 361                 }
 362                 $title = $this->getRelevantTitle();
 363                 if ( $title->hasSubjectNamespace( NS_USER ) ) {
 364                         $rootUser = $title->getRootText();
 365                         if ( User::isIP( $rootUser ) ) {
 366                                 $this->mRelevantUser = User::newFromName( $rootUser, false );
 367                         } else {
 368                                 $user = User::newFromName( $rootUser, false );
 369                                 if ( $user && $user->isLoggedIn() ) {
 370                                         $this->mRelevantUser = $user;
 371                                 }
 372                         }
 373                         return $this->mRelevantUser;
 374                 }
 375                 return null;
 376         }
 377
 378         /**
 379          * Outputs the HTML generated by other functions.
 380          * @param OutputPage $out
 381          */
 382         abstract function outputPage( OutputPage $out = null );
 383
 384         /**
 385          * @param array $data
 386          * @return string
 387          */
 388         static function makeVariablesScript( $data ) {
 389                 if ( $data ) {
 390                         return Html::inlineScript(
 391                                 ResourceLoader::makeLoaderConditionalScript( ResourceLoader::makeConfigSetScript( $data ) )
 392                         );
 393                 } else {
 394                         return '';
 395                 }
 396         }
 397
 398         /**
 399          * Make a "<script>" tag containing global variables
 400          *
 401          * @deprecated since 1.19
 402          * @param mixed $unused
 403          * @return string HTML fragment
 404          */
 405         public static function makeGlobalVariablesScript( $unused ) {
 406                 global $wgOut;
 407
 408                 wfDeprecated( __METHOD__, '1.19' );
 409
 410                 return self::makeVariablesScript( $wgOut->getJSVars() );
 411         }
 412
 413         /**
 414          * Get the query to generate a dynamic stylesheet
 415          *
 416          * @return array
 417          */
 418         public static function getDynamicStylesheetQuery() {
 419                 global $wgSquidMaxage;
 420
 421                 return array(
 422                                 'action' => 'raw',
 423                                 'maxage' => $wgSquidMaxage,
 424                                 'usemsgcache' => 'yes',
 425                                 'ctype' => 'text/css',
 426                                 'smaxage' => $wgSquidMaxage,
 427                         );
 428         }
 429
 430         /**
 431          * Add skin specific stylesheets
 432          * Calling this method with an $out of anything but the same OutputPage
 433          * inside ->getOutput() is deprecated. The $out arg is kept
 434          * for compatibility purposes with skins.
 435          * @param OutputPage $out
 436          * @todo delete
 437          */
 438         abstract function setupSkinUserCss( OutputPage $out );
 439
 440         /**
 441          * TODO: document
 442          * @param Title $title
 443          * @return string
 444          */
 445         function getPageClasses( $title ) {
 446                 $numeric = 'ns-' . $title->getNamespace();
 447
 448                 if ( $title->isSpecialPage() ) {
 449                         $type = 'ns-special';
 450                         // bug 23315: provide a class based on the canonical special page name without subpages
 451                         list( $canonicalName ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );
 452                         if ( $canonicalName ) {
 453                                 $type .= ' ' . Sanitizer::escapeClass( "mw-special-$canonicalName" );
 454                         } else {
 455                                 $type .= ' mw-invalidspecialpage';
 456                         }
 457                 } elseif ( $title->isTalkPage() ) {
 458                         $type = 'ns-talk';
 459                 } else {
 460                         $type = 'ns-subject';
 461                 }
 462
 463                 $name = Sanitizer::escapeClass( 'page-' . $title->getPrefixedText() );
 464
 465                 return "$numeric $type $name";
 466         }
 467
 468         /*
 469          * Return values for <html> element
 470          * @return array of associative name-to-value elements for <html> element
 471          */
 472         public function getHtmlElementAttributes() {
 473                 $lang = $this->getLanguage();
 474                 return array(
 475                         'lang' => $lang->getHtmlCode(),
 476                         'dir' => $lang->getDir(),
 477                         'class' => 'client-nojs',
 478                 );
 479         }
 480
 481         /**
 482          * This will be called by OutputPage::headElement when it is creating the
 483          * "<body>" tag, skins can override it if they have a need to add in any
 484          * body attributes or classes of their own.
 485          * @param OutputPage $out
 486          * @param array $bodyAttrs
 487          */
 488         function addToBodyAttributes( $out, &$bodyAttrs ) {
 489                 // does nothing by default
 490         }
 491
 492         /**
 493          * URL to the logo
 494          * @return string
 495          */
 496         function getLogo() {
 497                 global $wgLogo;
 498                 return $wgLogo;
 499         }
 500
 501         /**
 502          * @return string
 503          */
 504         function getCategoryLinks() {
 505                 global $wgUseCategoryBrowser;
 506
 507                 $out = $this->getOutput();
 508                 $allCats = $out->getCategoryLinks();
 509
 510                 if ( !count( $allCats ) ) {
 511                         return '';
 512                 }
 513
 514                 $embed = "<li>";
 515                 $pop = "</li>";
 516
 517                 $s = '';
 518                 $colon = $this->msg( 'colon-separator' )->escaped();
 519
 520                 if ( !empty( $allCats['normal'] ) ) {
 521                         $t = $embed . implode( "{$pop}{$embed}", $allCats['normal'] ) . $pop;
 522
 523                         $msg = $this->msg( 'pagecategories' )->numParams( count( $allCats['normal'] ) )->escaped();
 524                         $linkPage = wfMessage( 'pagecategorieslink' )->inContentLanguage()->text();
 525                         $s .= '<div id="mw-normal-catlinks" class="mw-normal-catlinks">' .
 526                                 Linker::link( Title::newFromText( $linkPage ), $msg )
 527                                 . $colon . '<ul>' . $t . '</ul>' . '</div>';
 528                 }
 529
 530                 # Hidden categories
 531                 if ( isset( $allCats['hidden'] ) ) {
 532                         if ( $this->getUser()->getBoolOption( 'showhiddencats' ) ) {
 533                                 $class = ' mw-hidden-cats-user-shown';
 534                         } elseif ( $this->getTitle()->getNamespace() == NS_CATEGORY ) {
 535                                 $class = ' mw-hidden-cats-ns-shown';
 536                         } else {
 537                                 $class = ' mw-hidden-cats-hidden';
 538                         }
 539
 540                         $s .= "<div id=\"mw-hidden-catlinks\" class=\"mw-hidden-catlinks$class\">" .
 541                                 $this->msg( 'hidden-categories' )->numParams( count( $allCats['hidden'] ) )->escaped() .
 542                                 $colon . '<ul>' . $embed . implode( "{$pop}{$embed}", $allCats['hidden'] ) . $pop . '</ul>' .
 543                                 '</div>';
 544                 }
 545
 546                 # optional 'dmoz-like' category browser. Will be shown under the list
 547                 # of categories an article belong to
 548                 if ( $wgUseCategoryBrowser ) {
 549                         $s .= '<br /><hr />';
 550
 551                         # get a big array of the parents tree
 552                         $parenttree = $this->getTitle()->getParentCategoryTree();
 553                         # Skin object passed by reference cause it can not be
 554                         # accessed under the method subfunction drawCategoryBrowser
 555                         $tempout = explode( "\n", $this->drawCategoryBrowser( $parenttree ) );
 556                         # Clean out bogus first entry and sort them
 557                         unset( $tempout[0] );
 558                         asort( $tempout );
 559                         # Output one per line
 560                         $s .= implode( "<br />\n", $tempout );
 561                 }
 562
 563                 return $s;
 564         }
 565
 566         /**
 567          * Render the array as a series of links.
 568          * @param array $tree Categories tree returned by Title::getParentCategoryTree
 569          * @return string Separated by &gt;, terminate with "\n"
 570          */
 571         function drawCategoryBrowser( $tree ) {
 572                 $return = '';
 573
 574                 foreach ( $tree as $element => $parent ) {
 575                         if ( empty( $parent ) ) {
 576                                 # element start a new list
 577                                 $return .= "\n";
 578                         } else {
 579                                 # grab the others elements
 580                                 $return .= $this->drawCategoryBrowser( $parent ) . ' &gt; ';
 581                         }
 582
 583                         # add our current element to the list
 584                         $eltitle = Title::newFromText( $element );
 585                         $return .= Linker::link( $eltitle, htmlspecialchars( $eltitle->getText() ) );
 586                 }
 587
 588                 return $return;
 589         }
 590
 591         /**
 592          * @return string
 593          */
 594         function getCategories() {
 595                 $out = $this->getOutput();
 596
 597                 $catlinks = $this->getCategoryLinks();
 598
 599                 $classes = 'catlinks';
 600
 601                 // Check what we're showing
 602                 $allCats = $out->getCategoryLinks();
 603                 $showHidden = $this->getUser()->getBoolOption( 'showhiddencats' ) ||
 604                                                 $this->getTitle()->getNamespace() == NS_CATEGORY;
 605
 606                 if ( empty( $allCats['normal'] ) && !( !empty( $allCats['hidden'] ) && $showHidden ) ) {
 607                         $classes .= ' catlinks-allhidden';
 608                 }
 609
 610                 return "<div id='catlinks' class='$classes'>{$catlinks}</div>";
 611         }
 612
 613         /**
 614          * This runs a hook to allow extensions placing their stuff after content
 615          * and article metadata (e.g. categories).
 616          * Note: This function has nothing to do with afterContent().
 617          *
 618          * This hook is placed here in order to allow using the same hook for all
 619          * skins, both the SkinTemplate based ones and the older ones, which directly
 620          * use this class to get their data.
 621          *
 622          * The output of this function gets processed in SkinTemplate::outputPage() for
 623          * the SkinTemplate based skins, all other skins should directly echo it.
 624          *
 625          * @return string Empty by default, if not changed by any hook function.
 626          */
 627         protected function afterContentHook() {
 628                 $data = '';
 629
 630                 if ( wfRunHooks( 'SkinAfterContent', array( &$data, $this ) ) ) {
 631                         // adding just some spaces shouldn't toggle the output
 632                         // of the whole <div/>, so we use trim() here
 633                         if ( trim( $data ) != '' ) {
 634                                 // Doing this here instead of in the skins to
 635                                 // ensure that the div has the same ID in all
 636                                 // skins
 637                                 $data = "<div id='mw-data-after-content'>\n" .
 638                                         "\t$data\n" .
 639                                         "</div>\n";
 640                         }
 641                 } else {
 642                         wfDebug( "Hook SkinAfterContent changed output processing.\n" );
 643                 }
 644
 645                 return $data;
 646         }
 647
 648         /**
 649          * Generate debug data HTML for displaying at the bottom of the main content
 650          * area.
 651          * @return string HTML containing debug data, if enabled (otherwise empty).
 652          */
 653         protected function generateDebugHTML() {
 654                 return MWDebug::getHTMLDebugLog();
 655         }
 656
 657         /**
 658          * This gets called shortly before the "</body>" tag.
 659          *
 660          * @return string HTML-wrapped JS code to be put before "</body>"
 661          */
 662         function bottomScripts() {
 663                 // TODO and the suckage continues. This function is really just a wrapper around
 664                 // OutputPage::getBottomScripts() which takes a Skin param. This should be cleaned
 665                 // up at some point
 666                 $bottomScriptText = $this->getOutput()->getBottomScripts();
 667                 wfRunHooks( 'SkinAfterBottomScripts', array( $this, &$bottomScriptText ) );
 668
 669                 return $bottomScriptText;
 670         }
 671
 672         /**
 673          * Text with the permalink to the source page,
 674          * usually shown on the footer of a printed page
 675          *
 676          * @return string HTML text with an URL
 677          */
 678         function printSource() {
 679                 $oldid = $this->getRevisionId();
 680                 if ( $oldid ) {
 681                         $url = htmlspecialchars( wfExpandIRI( $this->getTitle()->getCanonicalURL( 'oldid=' . $oldid ) ) );
 682                 } else {
 683                         // oldid not available for non existing pages
 684                         $url = htmlspecialchars( wfExpandIRI( $this->getTitle()->getCanonicalURL() ) );
 685                 }
 686                 return $this->msg( 'retrievedfrom', '<a dir="ltr" href="' . $url . '">' . $url . '</a>' )->text();
 687         }
 688
 689         /**
 690          * @return string
 691          */
 692         function getUndeleteLink() {
 693                 $action = $this->getRequest()->getVal( 'action', 'view' );
 694
 695                 if ( $this->getUser()->isAllowed( 'deletedhistory' ) &&
 696                         ( $this->getTitle()->getArticleID() == 0 || $action == 'history' ) ) {
 697                         $n = $this->getTitle()->isDeleted();
 698
 699                         if ( $n ) {
 700                                 if ( $this->getUser()->isAllowed( 'undelete' ) ) {
 701                                         $msg = 'thisisdeleted';
 702                                 } else {
 703                                         $msg = 'viewdeleted';
 704                                 }
 705
 706                                 return $this->msg( $msg )->rawParams(
 707                                         Linker::linkKnown(
 708                                                 SpecialPage::getTitleFor( 'Undelete', $this->getTitle()->getPrefixedDBkey() ),
 709                                                 $this->msg( 'restorelink' )->numParams( $n )->escaped() )
 710                                         )->text();
 711                         }
 712                 }
 713
 714                 return '';
 715         }
 716
 717         /**
 718          * @return string
 719          */
 720         function subPageSubtitle() {
 721                 global $wgLang;
 722                 $out = $this->getOutput();
 723                 $subpages = '';
 724
 725                 if ( !wfRunHooks( 'SkinSubPageSubtitle', array( &$subpages, $this, $out ) ) ) {
 726                         return $subpages;
 727                 }
 728
 729                 if ( $out->isArticle() && MWNamespace::hasSubpages( $out->getTitle()->getNamespace() ) ) {
 730                         $ptext = $this->getTitle()->getPrefixedText();
 731                         if ( preg_match( '/\//', $ptext ) ) {
 732                                 $links = explode( '/', $ptext );
 733                                 array_pop( $links );
 734                                 $c = 0;
 735                                 $growinglink = '';
 736                                 $display = '';
 737
 738                                 foreach ( $links as $link ) {
 739                                         $growinglink .= $link;
 740                                         $display .= $link;
 741                                         $linkObj = Title::newFromText( $growinglink );
 742
 743                                         if ( is_object( $linkObj ) && $linkObj->isKnown() ) {
 744                                                 $getlink = Linker::linkKnown(
 745                                                         $linkObj,
 746                                                         htmlspecialchars( $display )
 747                                                 );
 748
 749                                                 $c++;
 750
 751                                                 if ( $c > 1 ) {
 752                                                         $subpages .= $wgLang->getDirMarkEntity() . $this->msg( 'pipe-separator' )->escaped();
 753                                                 } else {
 754                                                         $subpages .= '&lt; ';
 755                                                 }
 756
 757                                                 $subpages .= $getlink;
 758                                                 $display = '';
 759                                         } else {
 760                                                 $display .= '/';
 761                                         }
 762                                         $growinglink .= '/';
 763                                 }
 764                         }
 765                 }
 766
 767                 return $subpages;
 768         }
 769
 770         /**
 771          * Returns true if the IP should be shown in the header
 772          * @return bool
 773          */
 774         function showIPinHeader() {
 775                 global $wgShowIPinHeader;
 776                 return $wgShowIPinHeader && session_id() != '';
 777         }
 778
 779         /**
 780          * @return string
 781          */
 782         function getSearchLink() {
 783                 $searchPage = SpecialPage::getTitleFor( 'Search' );
 784                 return $searchPage->getLocalURL();
 785         }
 786
 787         /**
 788          * @return string
 789          */
 790         function escapeSearchLink() {
 791                 return htmlspecialchars( $this->getSearchLink() );
 792         }
 793
 794         /**
 795          * @param string $type
 796          * @return string
 797          */
 798         function getCopyright( $type = 'detect' ) {
 799                 global $wgRightsPage, $wgRightsUrl, $wgRightsText, $wgContLang;
 800
 801                 if ( $type == 'detect' ) {
 802                         if ( !$this->isRevisionCurrent() && !$this->msg( 'history_copyright' )->inContentLanguage()->isDisabled() ) {
 803                                 $type = 'history';
 804                         } else {
 805                                 $type = 'normal';
 806                         }
 807                 }
 808
 809                 if ( $type == 'history' ) {
 810                         $msg = 'history_copyright';
 811                 } else {
 812                         $msg = 'copyright';
 813                 }
 814
 815                 if ( $wgRightsPage ) {
 816                         $title = Title::newFromText( $wgRightsPage );
 817                         $link = Linker::linkKnown( $title, $wgRightsText );
 818                 } elseif ( $wgRightsUrl ) {
 819                         $link = Linker::makeExternalLink( $wgRightsUrl, $wgRightsText );
 820                 } elseif ( $wgRightsText ) {
 821                         $link = $wgRightsText;
 822                 } else {
 823                         # Give up now
 824                         return '';
 825                 }
 826
 827                 // Allow for site and per-namespace customization of copyright notice.
 828                 $forContent = true;
 829
 830                 wfRunHooks( 'SkinCopyrightFooter', array( $this->getTitle(), $type, &$msg, &$link, &$forContent ) );
 831
 832                 $msgObj = $this->msg( $msg )->rawParams( $link );
 833                 if ( $forContent ) {
 834                         $msg = $msgObj->inContentLanguage()->text();
 835                         if ( $this->getLanguage()->getCode() !== $wgContLang->getCode() ) {
 836                                 $msg = Html::rawElement( 'span', array( 'lang' => $wgContLang->getHtmlCode(), 'dir' => $wgContLang->getDir() ), $msg );
 837                         }
 838                         return $msg;
 839                 } else {
 840                         return $msgObj->text();
 841                 }
 842         }
 843
 844         /**
 845          * @return null|string
 846          */
 847         function getCopyrightIcon() {
 848                 global $wgRightsUrl, $wgRightsText, $wgRightsIcon, $wgCopyrightIcon;
 849
 850                 $out = '';
 851
 852                 if ( isset( $wgCopyrightIcon ) && $wgCopyrightIcon ) {
 853                         $out = $wgCopyrightIcon;
 854                 } elseif ( $wgRightsIcon ) {
 855                         $icon = htmlspecialchars( $wgRightsIcon );
 856
 857                         if ( $wgRightsUrl ) {
 858                                 $url = htmlspecialchars( $wgRightsUrl );
 859                                 $out .= '<a href="' . $url . '">';
 860                         }
 861
 862                         $text = htmlspecialchars( $wgRightsText );
 863                         $out .= "<img src=\"$icon\" alt=\"$text\" width=\"88\" height=\"31\" />";
 864
 865                         if ( $wgRightsUrl ) {
 866                                 $out .= '</a>';
 867                         }
 868                 }
 869
 870                 return $out;
 871         }
 872
 873         /**
 874          * Gets the powered by MediaWiki icon.
 875          * @return string
 876          */
 877         function getPoweredBy() {
 878                 global $wgStylePath;
 879
 880                 $url = htmlspecialchars( "$wgStylePath/common/images/poweredby_mediawiki_88x31.png" );
 881                 $text = '<a href="//www.mediawiki.org/"><img src="' . $url . '" height="31" width="88" alt="Powered by MediaWiki" /></a>';
 882                 wfRunHooks( 'SkinGetPoweredBy', array( &$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 for the format of this array
 938          * @param bool|string $withImage Whether to use the icon's image or output a text-only footericon
 939          * @return string HTML
 940          */
 941         function makeFooterIcon( $icon, $withImage = 'withImage' ) {
 942                 if ( is_string( $icon ) ) {
 943                         $html = $icon;
 944                 } else { // Assuming array
 945                         $url = isset( $icon["url"] ) ? $icon["url"] : null;
 946                         unset( $icon["url"] );
 947                         if ( isset( $icon["src"] ) && $withImage === 'withImage' ) {
 948                                 $html = Html::element( 'img', $icon ); // do this the lazy way, just pass icon data as an attribute array
 949                         } else {
 950                                 $html = htmlspecialchars( $icon["alt"] );
 951                         }
 952                         if ( $url ) {
 953                                 $html = Html::rawElement( 'a', array( "href" => $url ), $html );
 954                         }
 955                 }
 956                 return $html;
 957         }
 958
 959         /**
 960          * Gets the link to the wiki's main page.
 961          * @return string
 962          */
 963         function mainPageLink() {
 964                 $s = Linker::linkKnown(
 965                         Title::newMainPage(),
 966                         $this->msg( 'mainpage' )->escaped()
 967                 );
 968
 969                 return $s;
 970         }
 971
 972         /**
 973          * Returns an HTML link for use in the footer
 974          * @param string $desc i18n message key for the link text
 975          * @param string $page i18n message key for the page to link to
 976          * @return string HTML anchor
 977          */
 978         public function footerLink( $desc, $page ) {
 979                 // if the link description has been set to "-" in the default language,
 980                 if ( $this->msg( $desc )->inContentLanguage()->isDisabled() ) {
 981                         // then it is disabled, for all languages.
 982                         return '';
 983                 } else {
 984                         // Otherwise, we display the link for the user, described in their
 985                         // language (which may or may not be the same as the default language),
 986                         // but we make the link target be the one site-wide page.
 987                         $title = Title::newFromText( $this->msg( $page )->inContentLanguage()->text() );
 988
 989                         return Linker::linkKnown(
 990                                 $title,
 991                                 $this->msg( $desc )->escaped()
 992                         );
 993                 }
 994         }
 995
 996         /**
 997          * Gets the link to the wiki's privacy policy page.
 998          * @return string HTML
 999          */
1000         function privacyLink() {
1001                 return $this->footerLink( 'privacy', 'privacypage' );
1002         }
1003
1004         /**
1005          * Gets the link to the wiki's about page.
1006          * @return string HTML
1007          */
1008         function aboutLink() {
1009                 return $this->footerLink( 'aboutsite', 'aboutpage' );
1010         }
1011
1012         /**
1013          * Gets the link to the wiki's general disclaimers page.
1014          * @return string HTML
1015          */
1016         function disclaimerLink() {
1017                 return $this->footerLink( 'disclaimers', 'disclaimerpage' );
1018         }
1019
1020         /**
1021          * Return URL options for the 'edit page' link.
1022          * This may include an 'oldid' specifier, if the current page view is such.
1023          *
1024          * @return array
1025          * @private
1026          */
1027         function editUrlOptions() {
1028                 $options = array( 'action' => 'edit' );
1029
1030                 if ( !$this->isRevisionCurrent() ) {
1031                         $options['oldid'] = intval( $this->getRevisionId() );
1032                 }
1033
1034                 return $options;
1035         }
1036
1037         /**
1038          * @param User|int $id
1039          * @return bool
1040          */
1041         function showEmailUser( $id ) {
1042                 if ( $id instanceof User ) {
1043                         $targetUser = $id;
1044                 } else {
1045                         $targetUser = User::newFromId( $id );
1046                 }
1047                 return $this->getUser()->canSendEmail() && # the sending user must have a confirmed email address
1048                         $targetUser->canReceiveEmail(); # the target user must have a confirmed email address and allow emails from users
1049         }
1050
1051         /**
1052          * Return a fully resolved style path url to images or styles stored in the common folder.
1053          * This method returns a url resolved using the configured skin style path
1054          * and includes the style version inside of the url.
1055          * @param string $name The name or path of a skin resource file
1056          * @return string The fully resolved style path url including styleversion
1057          */
1058         function getCommonStylePath( $name ) {
1059                 global $wgStylePath, $wgStyleVersion;
1060                 return "$wgStylePath/common/$name?$wgStyleVersion";
1061         }
1062
1063         /**
1064          * Return a fully resolved style path url to images or styles stored in the current skins's folder.
1065          * This method returns a url resolved using the configured skin style path
1066          * and includes the style version inside of the url.
1067          * @param string $name The name or path of a skin resource file
1068          * @return string The fully resolved style path url including styleversion
1069          */
1070         function getSkinStylePath( $name ) {
1071                 global $wgStylePath, $wgStyleVersion;
1072                 return "$wgStylePath/{$this->stylename}/$name?$wgStyleVersion";
1073         }
1074
1075         /* these are used extensively in SkinTemplate, but also some other places */
1076
1077         /**
1078          * @param string $urlaction
1079          * @return string
1080          */
1081         static function makeMainPageUrl( $urlaction = '' ) {
1082                 $title = Title::newMainPage();
1083                 self::checkTitle( $title, '' );
1084
1085                 return $title->getLocalURL( $urlaction );
1086         }
1087
1088         /**
1089          * Make a URL for a Special Page using the given query and protocol.
1090          *
1091          * If $proto is set to null, make a local URL. Otherwise, make a full
1092          * URL with the protocol specified.
1093          *
1094          * @param string $name Name of the Special page
1095          * @param string $urlaction Query to append
1096          * @param string|null $proto Protocol to use or null for a local URL
1097          * @return string
1098          */
1099         static function makeSpecialUrl( $name, $urlaction = '', $proto = null ) {
1100                 $title = SpecialPage::getSafeTitleFor( $name );
1101                 if ( is_null( $proto ) ) {
1102                         return $title->getLocalURL( $urlaction );
1103                 } else {
1104                         return $title->getFullURL( $urlaction, false, $proto );
1105                 }
1106         }
1107
1108         /**
1109          * @param string $name
1110          * @param string $subpage
1111          * @param string $urlaction
1112          * @return string
1113          */
1114         static function makeSpecialUrlSubpage( $name, $subpage, $urlaction = '' ) {
1115                 $title = SpecialPage::getSafeTitleFor( $name, $subpage );
1116                 return $title->getLocalURL( $urlaction );
1117         }
1118
1119         /**
1120          * @param string $name
1121          * @param string $urlaction
1122          * @return string
1123          */
1124         static function makeI18nUrl( $name, $urlaction = '' ) {
1125                 $title = Title::newFromText( wfMessage( $name )->inContentLanguage()->text() );
1126                 self::checkTitle( $title, $name );
1127                 return $title->getLocalURL( $urlaction );
1128         }
1129
1130         /**
1131          * @param string $name
1132          * @param string $urlaction
1133          * @return string
1134          */
1135         static function makeUrl( $name, $urlaction = '' ) {
1136                 $title = Title::newFromText( $name );
1137                 self::checkTitle( $title, $name );
1138
1139                 return $title->getLocalURL( $urlaction );
1140         }
1141
1142         /**
1143          * If url string starts with http, consider as external URL, else
1144          * internal
1145          * @param string $name
1146          * @return string URL
1147          */
1148         static function makeInternalOrExternalUrl( $name ) {
1149                 if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $name ) ) {
1150                         return $name;
1151                 } else {
1152                         return self::makeUrl( $name );
1153                 }
1154         }
1155
1156         /**
1157          * this can be passed the NS number as defined in Language.php
1158          * @param string $name
1159          * @param string $urlaction
1160          * @param int $namespace
1161          * @return string
1162          */
1163         static function makeNSUrl( $name, $urlaction = '', $namespace = NS_MAIN ) {
1164                 $title = Title::makeTitleSafe( $namespace, $name );
1165                 self::checkTitle( $title, $name );
1166
1167                 return $title->getLocalURL( $urlaction );
1168         }
1169
1170         /**
1171          * these return an array with the 'href' and boolean 'exists'
1172          * @param string $name
1173          * @param string $urlaction
1174          * @return array
1175          */
1176         static function makeUrlDetails( $name, $urlaction = '' ) {
1177                 $title = Title::newFromText( $name );
1178                 self::checkTitle( $title, $name );
1179
1180                 return array(
1181                         'href' => $title->getLocalURL( $urlaction ),
1182                         'exists' => $title->getArticleID() != 0,
1183                 );
1184         }
1185
1186         /**
1187          * Make URL details where the article exists (or at least it's convenient to think so)
1188          * @param string $name Article name
1189          * @param string $urlaction
1190          * @return array
1191          */
1192         static function makeKnownUrlDetails( $name, $urlaction = '' ) {
1193                 $title = Title::newFromText( $name );
1194                 self::checkTitle( $title, $name );
1195
1196                 return array(
1197                         'href' => $title->getLocalURL( $urlaction ),
1198                         'exists' => true
1199                 );
1200         }
1201
1202         /**
1203          * make sure we have some title to operate on
1204          *
1205          * @param Title $title
1206          * @param string $name
1207          */
1208         static function checkTitle( &$title, $name ) {
1209                 if ( !is_object( $title ) ) {
1210                         $title = Title::newFromText( $name );
1211                         if ( !is_object( $title ) ) {
1212                                 $title = Title::newFromText( '--error: link target missing--' );
1213                         }
1214                 }
1215         }
1216
1217         /**
1218          * Build an array that represents the sidebar(s), the navigation bar among them.
1219          *
1220          * BaseTemplate::getSidebar can be used to simplify the format and id generation in new skins.
1221          *
1222          * The format of the returned array is array( heading => content, ... ), where:
1223          * - heading is the heading of a navigation portlet. It is either:
1224          *   - magic string to be handled by the skins ('SEARCH' / 'LANGUAGES' / 'TOOLBOX' / ...)
1225          *   - a message name (e.g. 'navigation'), the message should be HTML-escaped by the skin
1226          *   - plain text, which should be HTML-escaped by the skin
1227          * - content is the contents of the portlet. It is either:
1228          *   - HTML text (<ul><li>...</li>...</ul>)
1229          *   - array of link data in a format accepted by BaseTemplate::makeListItem()
1230          *   - (for a magic string as a key, any value)
1231          *
1232          * Note that extensions can control the sidebar contents using the SkinBuildSidebar hook
1233          * and can technically insert anything in here; skin creators are expected to handle
1234          * values described above.
1235          *
1236          * @return array
1237          */
1238         function buildSidebar() {
1239                 global $wgMemc, $wgEnableSidebarCache, $wgSidebarCacheExpiry;
1240                 wfProfileIn( __METHOD__ );
1241
1242                 $key = wfMemcKey( 'sidebar', $this->getLanguage()->getCode() );
1243
1244                 if ( $wgEnableSidebarCache ) {
1245                         $cachedsidebar = $wgMemc->get( $key );
1246                         if ( $cachedsidebar ) {
1247                                 wfProfileOut( __METHOD__ );
1248                                 return $cachedsidebar;
1249                         }
1250                 }
1251
1252                 $bar = array();
1253                 $this->addToSidebar( $bar, 'sidebar' );
1254
1255                 wfRunHooks( 'SkinBuildSidebar', array( $this, &$bar ) );
1256                 if ( $wgEnableSidebarCache ) {
1257                         $wgMemc->set( $key, $bar, $wgSidebarCacheExpiry );
1258                 }
1259
1260                 wfProfileOut( __METHOD__ );
1261                 return $bar;
1262         }
1263
1264         /**
1265          * Add content from a sidebar system message
1266          * Currently only used for MediaWiki:Sidebar (but may be used by Extensions)
1267          *
1268          * This is just a wrapper around addToSidebarPlain() for backwards compatibility
1269          *
1270          * @param array $bar
1271          * @param string $message
1272          */
1273         function addToSidebar( &$bar, $message ) {
1274                 $this->addToSidebarPlain( $bar, wfMessage( $message )->inContentLanguage()->plain() );
1275         }
1276
1277         /**
1278          * Add content from plain text
1279          * @since 1.17
1280          * @param array $bar
1281          * @param string $text
1282          * @return array
1283          */
1284         function addToSidebarPlain( &$bar, $text ) {
1285                 $lines = explode( "\n", $text );
1286
1287                 $heading = '';
1288
1289                 foreach ( $lines as $line ) {
1290                         if ( strpos( $line, '*' ) !== 0 ) {
1291                                 continue;
1292                         }
1293                         $line = rtrim( $line, "\r" ); // for Windows compat
1294
1295                         if ( strpos( $line, '**' ) !== 0 ) {
1296                                 $heading = trim( $line, '* ' );
1297                                 if ( !array_key_exists( $heading, $bar ) ) {
1298                                         $bar[$heading] = array();
1299                                 }
1300                         } else {
1301                                 $line = trim( $line, '* ' );
1302
1303                                 if ( strpos( $line, '|' ) !== false ) { // sanity check
1304                                         $line = MessageCache::singleton()->transform( $line, false, null, $this->getTitle() );
1305                                         $line = array_map( 'trim', explode( '|', $line, 2 ) );
1306                                         if ( count( $line ) !== 2 ) {
1307                                                 // Second sanity check, could be hit by people doing
1308                                                 // funky stuff with parserfuncs... (bug 33321)
1309                                                 continue;
1310                                         }
1311
1312                                         $extraAttribs = array();
1313
1314                                         $msgLink = $this->msg( $line[0] )->inContentLanguage();
1315                                         if ( $msgLink->exists() ) {
1316                                                 $link = $msgLink->text();
1317                                                 if ( $link == '-' ) {
1318                                                         continue;
1319                                                 }
1320                                         } else {
1321                                                 $link = $line[0];
1322                                         }
1323                                         $msgText = $this->msg( $line[1] );
1324                                         if ( $msgText->exists() ) {
1325                                                 $text = $msgText->text();
1326                                         } else {
1327                                                 $text = $line[1];
1328                                         }
1329
1330                                         if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $link ) ) {
1331                                                 $href = $link;
1332
1333                                                 // Parser::getExternalLinkAttribs won't work here because of the Namespace things
1334                                                 global $wgNoFollowLinks, $wgNoFollowDomainExceptions;
1335                                                 if ( $wgNoFollowLinks && !wfMatchesDomainList( $href, $wgNoFollowDomainExceptions ) ) {
1336                                                         $extraAttribs['rel'] = 'nofollow';
1337                                                 }
1338
1339                                                 global $wgExternalLinkTarget;
1340                                                 if ( $wgExternalLinkTarget ) {
1341                                                         $extraAttribs['target'] = $wgExternalLinkTarget;
1342                                                 }
1343                                         } else {
1344                                                 $title = Title::newFromText( $link );
1345
1346                                                 if ( $title ) {
1347                                                         $title = $title->fixSpecialName();
1348                                                         $href = $title->getLinkURL();
1349                                                 } else {
1350                                                         $href = 'INVALID-TITLE';
1351                                                 }
1352                                         }
1353
1354                                         $bar[$heading][] = array_merge( array(
1355                                                 'text' => $text,
1356                                                 'href' => $href,
1357                                                 'id' => 'n-' . Sanitizer::escapeId( strtr( $line[1], ' ', '-' ), 'noninitial' ),
1358                                                 'active' => false
1359                                         ), $extraAttribs );
1360                                 } else {
1361                                         continue;
1362                                 }
1363                         }
1364                 }
1365
1366                 return $bar;
1367         }
1368
1369         /**
1370          * This function previously controlled whether the 'mediawiki.legacy.wikiprintable' module
1371          * should be loaded by OutputPage. That module no longer exists and the return value of this
1372          * method is ignored.
1373          *
1374          * If your skin doesn't provide its own print styles, the 'mediawiki.legacy.commonPrint' module
1375          * can be used instead (SkinTemplate-based skins do it automatically).
1376          *
1377          * @deprecated since 1.22
1378          * @return bool
1379          */
1380         public function commonPrintStylesheet() {
1381                 wfDeprecated( __METHOD__, '1.22' );
1382                 return false;
1383         }
1384
1385         /**
1386          * Gets new talk page messages for the current user and returns an
1387          * appropriate alert message (or an empty string if there are no messages)
1388          * @return string
1389          */
1390         function getNewtalks() {
1391
1392                 $newMessagesAlert = '';
1393                 $user = $this->getUser();
1394                 $newtalks = $user->getNewMessageLinks();
1395                 $out = $this->getOutput();
1396
1397                 // Allow extensions to disable or modify the new messages alert
1398                 if ( !wfRunHooks( 'GetNewMessagesAlert', array( &$newMessagesAlert, $newtalks, $user, $out ) ) ) {
1399                         return '';
1400                 }
1401                 if ( $newMessagesAlert ) {
1402                         return $newMessagesAlert;
1403                 }
1404
1405                 if ( count( $newtalks ) == 1 && $newtalks[0]['wiki'] === wfWikiID() ) {
1406                         $uTalkTitle = $user->getTalkPage();
1407                         $lastSeenRev = isset( $newtalks[0]['rev'] ) ? $newtalks[0]['rev'] : null;
1408                         $nofAuthors = 0;
1409                         if ( $lastSeenRev !== null ) {
1410                                 $plural = true; // Default if we have a last seen revision: if unknown, use plural
1411                                 $latestRev = Revision::newFromTitle( $uTalkTitle, false, Revision::READ_NORMAL );
1412                                 if ( $latestRev !== null ) {
1413                                         // Singular if only 1 unseen revision, plural if several unseen revisions.
1414                                         $plural = $latestRev->getParentId() !== $lastSeenRev->getId();
1415                                         $nofAuthors = $uTalkTitle->countAuthorsBetween(
1416                                                 $lastSeenRev, $latestRev, 10, 'include_new' );
1417                                 }
1418                         } else {
1419                                 // Singular if no revision -> diff link will show latest change only in any case
1420                                 $plural = false;
1421                         }
1422                         $plural = $plural ? 999 : 1;
1423                         // 999 signifies "more than one revision". We don't know how many, and even if we did,
1424                         // the number of revisions or authors is not necessarily the same as the number of
1425                         // "messages".
1426                         $newMessagesLink = Linker::linkKnown(
1427                                 $uTalkTitle,
1428                                 $this->msg( 'newmessageslinkplural' )->params( $plural )->escaped(),
1429                                 array(),
1430                                 array( 'redirect' => 'no' )
1431                         );
1432
1433                         $newMessagesDiffLink = Linker::linkKnown(
1434                                 $uTalkTitle,
1435                                 $this->msg( 'newmessagesdifflinkplural' )->params( $plural )->escaped(),
1436                                 array(),
1437                                 $lastSeenRev !== null
1438                                         ? array( 'oldid' => $lastSeenRev->getId(), 'diff' => 'cur' )
1439                                         : array( 'diff' => 'cur' )
1440                         );
1441
1442                         if ( $nofAuthors >= 1 && $nofAuthors <= 10 ) {
1443                                 $newMessagesAlert = $this->msg(
1444                                         'youhavenewmessagesfromusers',
1445                                         $newMessagesLink,
1446                                         $newMessagesDiffLink
1447                                 )->numParams( $nofAuthors, $plural );
1448                         } else {
1449                                 // $nofAuthors === 11 signifies "11 or more" ("more than 10")
1450                                 $newMessagesAlert = $this->msg(
1451                                         $nofAuthors > 10 ? 'youhavenewmessagesmanyusers' : 'youhavenewmessages',
1452                                         $newMessagesLink,
1453                                         $newMessagesDiffLink
1454                                 )->numParams( $plural );
1455                         }
1456                         $newMessagesAlert = $newMessagesAlert->text();
1457                         # Disable Squid cache
1458                         $out->setSquidMaxage( 0 );
1459                 } elseif ( count( $newtalks ) ) {
1460                         $sep = $this->msg( 'newtalkseparator' )->escaped();
1461                         $msgs = array();
1462
1463                         foreach ( $newtalks as $newtalk ) {
1464                                 $msgs[] = Xml::element(
1465                                         'a',
1466                                         array( 'href' => $newtalk['link'] ), $newtalk['wiki']
1467                                 );
1468                         }
1469                         $parts = implode( $sep, $msgs );
1470                         $newMessagesAlert = $this->msg( 'youhavenewmessagesmulti' )->rawParams( $parts )->escaped();
1471                         $out->setSquidMaxage( 0 );
1472                 }
1473
1474                 return $newMessagesAlert;
1475         }
1476
1477         /**
1478          * Get a cached notice
1479          *
1480          * @param string $name Message name, or 'default' for $wgSiteNotice
1481          * @return string HTML fragment
1482          */
1483         private function getCachedNotice( $name ) {
1484                 global $wgRenderHashAppend, $parserMemc, $wgContLang;
1485
1486                 wfProfileIn( __METHOD__ );
1487
1488                 $needParse = false;
1489
1490                 if ( $name === 'default' ) {
1491                         // special case
1492                         global $wgSiteNotice;
1493                         $notice = $wgSiteNotice;
1494                         if ( empty( $notice ) ) {
1495                                 wfProfileOut( __METHOD__ );
1496                                 return false;
1497                         }
1498                 } else {
1499                         $msg = $this->msg( $name )->inContentLanguage();
1500                         if ( $msg->isDisabled() ) {
1501                                 wfProfileOut( __METHOD__ );
1502                                 return false;
1503                         }
1504                         $notice = $msg->plain();
1505                 }
1506
1507                 // Use the extra hash appender to let eg SSL variants separately cache.
1508                 $key = wfMemcKey( $name . $wgRenderHashAppend );
1509                 $cachedNotice = $parserMemc->get( $key );
1510                 if ( is_array( $cachedNotice ) ) {
1511                         if ( md5( $notice ) == $cachedNotice['hash'] ) {
1512                                 $notice = $cachedNotice['html'];
1513                         } else {
1514                                 $needParse = true;
1515                         }
1516                 } else {
1517                         $needParse = true;
1518                 }
1519
1520                 if ( $needParse ) {
1521                         $parsed = $this->getOutput()->parse( $notice );
1522                         $parserMemc->set( $key, array( 'html' => $parsed, 'hash' => md5( $notice ) ), 600 );
1523                         $notice = $parsed;
1524                 }
1525
1526                 $notice = Html::rawElement( 'div', array( 'id' => 'localNotice',
1527                         'lang' => $wgContLang->getHtmlCode(), 'dir' => $wgContLang->getDir() ), $notice );
1528                 wfProfileOut( __METHOD__ );
1529                 return $notice;
1530         }
1531
1532         /**
1533          * Get a notice based on page's namespace
1534          *
1535          * @return string HTML fragment
1536          */
1537         function getNamespaceNotice() {
1538                 wfProfileIn( __METHOD__ );
1539
1540                 $key = 'namespacenotice-' . $this->getTitle()->getNsText();
1541                 $namespaceNotice = $this->getCachedNotice( $key );
1542                 if ( $namespaceNotice && substr( $namespaceNotice, 0, 7 ) != '<p>&lt;' ) {
1543                         $namespaceNotice = '<div id="namespacebanner">' . $namespaceNotice . '</div>';
1544                 } else {
1545                         $namespaceNotice = '';
1546                 }
1547
1548                 wfProfileOut( __METHOD__ );
1549                 return $namespaceNotice;
1550         }
1551
1552         /**
1553          * Get the site notice
1554          *
1555          * @return string HTML fragment
1556          */
1557         function getSiteNotice() {
1558                 wfProfileIn( __METHOD__ );
1559                 $siteNotice = '';
1560
1561                 if ( wfRunHooks( 'SiteNoticeBefore', array( &$siteNotice, $this ) ) ) {
1562                         if ( is_object( $this->getUser() ) && $this->getUser()->isLoggedIn() ) {
1563                                 $siteNotice = $this->getCachedNotice( 'sitenotice' );
1564                         } else {
1565                                 $anonNotice = $this->getCachedNotice( 'anonnotice' );
1566                                 if ( !$anonNotice ) {
1567                                         $siteNotice = $this->getCachedNotice( 'sitenotice' );
1568                                 } else {
1569                                         $siteNotice = $anonNotice;
1570                                 }
1571                         }
1572                         if ( !$siteNotice ) {
1573                                 $siteNotice = $this->getCachedNotice( 'default' );
1574                         }
1575                 }
1576
1577                 wfRunHooks( 'SiteNoticeAfter', array( &$siteNotice, $this ) );
1578                 wfProfileOut( __METHOD__ );
1579                 return $siteNotice;
1580         }
1581
1582         /**
1583          * Create a section edit link.  This supersedes editSectionLink() and
1584          * editSectionLinkForOther().
1585          *
1586          * @param Title $nt The title being linked to (may not be the same as
1587          *   the current page, if the section is included from a template)
1588          * @param string $section The designation of the section being pointed to,
1589          *   to be included in the link, like "&section=$section"
1590          * @param string $tooltip The tooltip to use for the link: will be escaped
1591          *   and wrapped in the 'editsectionhint' message
1592          * @param string $lang Language code
1593          * @return string HTML to use for edit link
1594          */
1595         public function doEditSectionLink( Title $nt, $section, $tooltip = null, $lang = false ) {
1596                 // HTML generated here should probably have userlangattributes
1597                 // added to it for LTR text on RTL pages
1598
1599                 $lang = wfGetLangObj( $lang );
1600
1601                 $attribs = array();
1602                 if ( !is_null( $tooltip ) ) {
1603                         # Bug 25462: undo double-escaping.
1604                         $tooltip = Sanitizer::decodeCharReferences( $tooltip );
1605                         $attribs['title'] = wfMessage( 'editsectionhint' )->rawParams( $tooltip )
1606                                 ->inLanguage( $lang )->text();
1607                 }
1608                 $link = Linker::link( $nt, wfMessage( 'editsection' )->inLanguage( $lang )->text(),
1609                         $attribs,
1610                         array( 'action' => 'edit', 'section' => $section ),
1611                         array( 'noclasses', 'known' )
1612                 );
1613
1614                 # Add the brackets and the span and run the hook.
1615                 $result = '<span class="mw-editsection">'
1616                         . '<span class="mw-editsection-bracket">[</span>'
1617                         . $link
1618                         . '<span class="mw-editsection-bracket">]</span>'
1619                         . '</span>';
1620
1621                 wfRunHooks( 'DoEditSectionLink', array( $this, $nt, $section, $tooltip, &$result, $lang ) );
1622                 return $result;
1623         }
1624
1625         /**
1626          * Use PHP's magic __call handler to intercept legacy calls to the linker
1627          * for backwards compatibility.
1628          *
1629          * @param string $fname Name of called method
1630          * @param array $args Arguments to the method
1631          * @throws MWException
1632          * @return mixed
1633          */
1634         function __call( $fname, $args ) {
1635                 $realFunction = array( 'Linker', $fname );
1636                 if ( is_callable( $realFunction ) ) {
1637                         wfDeprecated( get_class( $this ) . '::' . $fname, '1.21' );
1638                         return call_user_func_array( $realFunction, $args );
1639                 } else {
1640                         $className = get_class( $this );
1641                         throw new MWException( "Call to undefined method $className::$fname" );
1642                 }
1643         }
1644
1645 }