includes/skins/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                 return SkinFactory::getDefaultInstance()->getSkinNames();
  51         }
  52
  53         /**
  54          * Fetch the skinname messages for available skins.
  55          * @return string[]
  56          */
  57         static function getSkinNameMessages() {
  58                 $messages = array();
  59                 foreach ( self::getSkinNames() as $skinKey => $skinName ) {
  60                         $messages[] = "skinname-$skinKey";
  61                 }
  62                 return $messages;
  63         }
  64
  65         /**
  66          * Fetch the list of user-selectable skins in regards to $wgSkipSkins.
  67          * Useful for Special:Preferences and other places where you
  68          * only want to show skins users _can_ use.
  69          * @return string[]
  70          * @since 1.23
  71          */
  72         public static function getAllowedSkins() {
  73                 global $wgSkipSkins;
  74
  75                 $allowedSkins = self::getSkinNames();
  76
  77                 foreach ( $wgSkipSkins as $skip ) {
  78                         unset( $allowedSkins[$skip] );
  79                 }
  80
  81                 return $allowedSkins;
  82         }
  83
  84         /**
  85          * @deprecated since 1.23, use getAllowedSkins
  86          * @return string[]
  87          */
  88         public static function getUsableSkins() {
  89                 wfDeprecated( __METHOD__, '1.23' );
  90                 return self::getAllowedSkins();
  91         }
  92
  93         /**
  94          * Normalize a skin preference value to a form that can be loaded.
  95          *
  96          * If a skin can't be found, it will fall back to the configured default ($wgDefaultSkin), or the
  97          * hardcoded default ($wgFallbackSkin) if the default skin is unavailable too.
  98          *
  99          * @param string $key 'monobook', 'vector', etc.
 100          * @return string
 101          */
 102         static function normalizeKey( $key ) {
 103                 global $wgDefaultSkin, $wgFallbackSkin;
 104
 105                 $skinNames = Skin::getSkinNames();
 106
 107                 // Make keys lowercase for case-insensitive matching.
 108                 $skinNames = array_change_key_case( $skinNames, CASE_LOWER );
 109                 $key = strtolower( $key );
 110                 $defaultSkin = strtolower( $wgDefaultSkin );
 111                 $fallbackSkin = strtolower( $wgFallbackSkin );
 112
 113                 if ( $key == '' || $key == 'default' ) {
 114                         // Don't return the default immediately;
 115                         // in a misconfiguration we need to fall back.
 116                         $key = $defaultSkin;
 117                 }
 118
 119                 if ( isset( $skinNames[$key] ) ) {
 120                         return $key;
 121                 }
 122
 123                 // Older versions of the software used a numeric setting
 124                 // in the user preferences.
 125                 $fallback = array(
 126                         0 => $defaultSkin,
 127                         2 => 'cologneblue'
 128                 );
 129
 130                 if ( isset( $fallback[$key] ) ) {
 131                         $key = $fallback[$key];
 132                 }
 133
 134                 if ( isset( $skinNames[$key] ) ) {
 135                         return $key;
 136                 } elseif ( isset( $skinNames[$defaultSkin] ) ) {
 137                         return $defaultSkin;
 138                 } else {
 139                         return $fallbackSkin;
 140                 }
 141         }
 142
 143         /**
 144          * Factory method for loading a skin of a given type
 145          * @param string $key 'monobook', 'vector', etc.
 146          * @return Skin
 147          * @deprecated since 1.24; Use SkinFactory instead
 148          */
 149         static function &newFromKey( $key ) {
 150                 wfDeprecated( __METHOD__, '1.24' );
 151
 152                 $key = Skin::normalizeKey( $key );
 153                 $factory = SkinFactory::getDefaultInstance();
 154
 155                 // normalizeKey() guarantees that a skin with this key will exist.
 156                 $skin = $factory->makeSkin( $key );
 157                 return $skin;
 158         }
 159
 160         /**
 161          * @return string Skin name
 162          */
 163         public function getSkinName() {
 164                 return $this->skinname;
 165         }
 166
 167         /**
 168          * @param OutputPage $out
 169          */
 170         function initPage( OutputPage $out ) {
 171
 172                 $this->preloadExistence();
 173
 174         }
 175
 176         /**
 177          * Defines the ResourceLoader modules that should be added to the skin
 178          * It is recommended that skins wishing to override call parent::getDefaultModules()
 179          * and substitute out any modules they wish to change by using a key to look them up
 180          * @return array Array of modules with helper keys for easy overriding
 181          */
 182         public function getDefaultModules() {
 183                 global $wgIncludeLegacyJavaScript, $wgPreloadJavaScriptMwUtil, $wgUseAjax,
 184                         $wgAjaxWatch, $wgEnableAPI, $wgEnableWriteAPI;
 185
 186                 $out = $this->getOutput();
 187                 $user = $out->getUser();
 188                 $modules = array(
 189                         // modules that enhance the page content in some way
 190                         'content' => array(
 191                                 'mediawiki.page.ready',
 192                         ),
 193                         // modules that exist for legacy reasons
 194                         'legacy' => array(),
 195                         // modules relating to search functionality
 196                         'search' => array(),
 197                         // modules relating to functionality relating to watching an article
 198                         'watch' => array(),
 199                         // modules which relate to the current users preferences
 200                         'user' => array(),
 201                 );
 202                 if ( $wgIncludeLegacyJavaScript ) {
 203                         $modules['legacy'][] = 'mediawiki.legacy.wikibits';
 204                 }
 205
 206                 if ( $wgPreloadJavaScriptMwUtil ) {
 207                         $modules['legacy'][] = 'mediawiki.util';
 208                 }
 209
 210                 // Add various resources if required
 211                 if ( $wgUseAjax ) {
 212                         if ( $wgEnableAPI ) {
 213                                 if ( $wgEnableWriteAPI && $wgAjaxWatch && $user->isLoggedIn()
 214                                         && $user->isAllowed( 'writeapi' )
 215                                 ) {
 216                                         $modules['watch'][] = 'mediawiki.page.watch.ajax';
 217                                 }
 218
 219                                 $modules['search'][] = 'mediawiki.searchSuggest';
 220                         }
 221                 }
 222
 223                 if ( $user->getBoolOption( 'editsectiononrightclick' ) ) {
 224                         $modules['user'][] = 'mediawiki.action.view.rightClickEdit';
 225                 }
 226
 227                 // Crazy edit-on-double-click stuff
 228                 if ( $out->isArticle() && $user->getOption( 'editondblclick' ) ) {
 229                         $modules['user'][] = 'mediawiki.action.view.dblClickEdit';
 230                 }
 231                 return $modules;
 232         }
 233
 234         /**
 235          * Preload the existence of three commonly-requested pages in a single query
 236          */
 237         function preloadExistence() {
 238                 $titles = array();
 239
 240                 $user = $this->getUser();
 241                 $title = $this->getRelevantTitle();
 242
 243                 // User/talk link
 244                 if ( $user->isLoggedIn() || $this->showIPinHeader() ) {
 245                         $titles[] = $user->getUserPage();
 246                         $titles[] = $user->getTalkPage();
 247                 }
 248
 249                 // Other tab link
 250                 if ( $title->isSpecialPage() ) {
 251                         // nothing
 252                 } elseif ( $title->isTalkPage() ) {
 253                         $titles[] = $title->getSubjectPage();
 254                 } else {
 255                         $titles[] = $title->getTalkPage();
 256                 }
 257
 258                 Hooks::run( 'SkinPreloadExistence', array( &$titles, $this ) );
 259
 260                 if ( count( $titles ) ) {
 261                         $lb = new LinkBatch( $titles );
 262                         $lb->setCaller( __METHOD__ );
 263                         $lb->execute();
 264                 }
 265         }
 266
 267         /**
 268          * Get the current revision ID
 269          *
 270          * @return int
 271          */
 272         public function getRevisionId() {
 273                 return $this->getOutput()->getRevisionId();
 274         }
 275
 276         /**
 277          * Whether the revision displayed is the latest revision of the page
 278          *
 279          * @return bool
 280          */
 281         public function isRevisionCurrent() {
 282                 $revID = $this->getRevisionId();
 283                 return $revID == 0 || $revID == $this->getTitle()->getLatestRevID();
 284         }
 285
 286         /**
 287          * Set the "relevant" title
 288          * @see self::getRelevantTitle()
 289          * @param Title $t
 290          */
 291         public function setRelevantTitle( $t ) {
 292                 $this->mRelevantTitle = $t;
 293         }
 294
 295         /**
 296          * Return the "relevant" title.
 297          * A "relevant" title is not necessarily the actual title of the page.
 298          * Special pages like Special:MovePage use set the page they are acting on
 299          * as their "relevant" title, this allows the skin system to display things
 300          * such as content tabs which belong to to that page instead of displaying
 301          * a basic special page tab which has almost no meaning.
 302          *
 303          * @return Title
 304          */
 305         public function getRelevantTitle() {
 306                 if ( isset( $this->mRelevantTitle ) ) {
 307                         return $this->mRelevantTitle;
 308                 }
 309                 return $this->getTitle();
 310         }
 311
 312         /**
 313          * Set the "relevant" user
 314          * @see self::getRelevantUser()
 315          * @param User $u
 316          */
 317         public function setRelevantUser( $u ) {
 318                 $this->mRelevantUser = $u;
 319         }
 320
 321         /**
 322          * Return the "relevant" user.
 323          * A "relevant" user is similar to a relevant title. Special pages like
 324          * Special:Contributions mark the user which they are relevant to so that
 325          * things like the toolbox can display the information they usually are only
 326          * able to display on a user's userpage and talkpage.
 327          * @return User
 328          */
 329         public function getRelevantUser() {
 330                 if ( isset( $this->mRelevantUser ) ) {
 331                         return $this->mRelevantUser;
 332                 }
 333                 $title = $this->getRelevantTitle();
 334                 if ( $title->hasSubjectNamespace( NS_USER ) ) {
 335                         $rootUser = $title->getRootText();
 336                         if ( User::isIP( $rootUser ) ) {
 337                                 $this->mRelevantUser = User::newFromName( $rootUser, false );
 338                         } else {
 339                                 $user = User::newFromName( $rootUser, false );
 340
 341                                 if ( $user ) {
 342                                         $user->load( User::READ_NORMAL );
 343
 344                                         if ( $user->isLoggedIn() ) {
 345                                                 $this->mRelevantUser = $user;
 346                                         }
 347                                 }
 348                         }
 349                         return $this->mRelevantUser;
 350                 }
 351                 return null;
 352         }
 353
 354         /**
 355          * Outputs the HTML generated by other functions.
 356          * @param OutputPage $out
 357          */
 358         abstract function outputPage( OutputPage $out = null );
 359
 360         /**
 361          * @param array $data
 362          * @return string
 363          */
 364         static function makeVariablesScript( $data ) {
 365                 if ( $data ) {
 366                         return ResourceLoader::makeInlineScript(
 367                                 ResourceLoader::makeConfigSetScript( $data )
 368                         );
 369                 } else {
 370                         return '';
 371                 }
 372         }
 373
 374         /**
 375          * Get the query to generate a dynamic stylesheet
 376          *
 377          * @return array
 378          */
 379         public static function getDynamicStylesheetQuery() {
 380                 global $wgSquidMaxage;
 381
 382                 return array(
 383                                 'action' => 'raw',
 384                                 'maxage' => $wgSquidMaxage,
 385                                 'usemsgcache' => 'yes',
 386                                 'ctype' => 'text/css',
 387                                 'smaxage' => $wgSquidMaxage,
 388                         );
 389         }
 390
 391         /**
 392          * Add skin specific stylesheets
 393          * Calling this method with an $out of anything but the same OutputPage
 394          * inside ->getOutput() is deprecated. The $out arg is kept
 395          * for compatibility purposes with skins.
 396          * @param OutputPage $out
 397          * @todo delete
 398          */
 399         abstract function setupSkinUserCss( OutputPage $out );
 400
 401         /**
 402          * TODO: document
 403          * @param Title $title
 404          * @return string
 405          */
 406         function getPageClasses( $title ) {
 407                 $numeric = 'ns-' . $title->getNamespace();
 408
 409                 if ( $title->isSpecialPage() ) {
 410                         $type = 'ns-special';
 411                         // bug 23315: provide a class based on the canonical special page name without subpages
 412                         list( $canonicalName ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );
 413                         if ( $canonicalName ) {
 414                                 $type .= ' ' . Sanitizer::escapeClass( "mw-special-$canonicalName" );
 415                         } else {
 416                                 $type .= ' mw-invalidspecialpage';
 417                         }
 418                 } elseif ( $title->isTalkPage() ) {
 419                         $type = 'ns-talk';
 420                 } else {
 421                         $type = 'ns-subject';
 422                 }
 423
 424                 $name = Sanitizer::escapeClass( 'page-' . $title->getPrefixedText() );
 425
 426                 return "$numeric $type $name";
 427         }
 428
 429         /**
 430          * Return values for <html> element
 431          * @return array Array of associative name-to-value elements for <html> element
 432          */
 433         public function getHtmlElementAttributes() {
 434                 $lang = $this->getLanguage();
 435                 return array(
 436                         'lang' => $lang->getHtmlCode(),
 437                         'dir' => $lang->getDir(),
 438                         'class' => 'client-nojs',
 439                 );
 440         }
 441
 442         /**
 443          * This will be called by OutputPage::headElement when it is creating the
 444          * "<body>" tag, skins can override it if they have a need to add in any
 445          * body attributes or classes of their own.
 446          * @param OutputPage $out
 447          * @param array $bodyAttrs
 448          */
 449         function addToBodyAttributes( $out, &$bodyAttrs ) {
 450                 // does nothing by default
 451         }
 452
 453         /**
 454          * URL to the logo
 455          * @return string
 456          */
 457         function getLogo() {
 458                 global $wgLogo;
 459                 return $wgLogo;
 460         }
 461
 462         /**
 463          * @return string
 464          */
 465         function getCategoryLinks() {
 466                 global $wgUseCategoryBrowser;
 467
 468                 $out = $this->getOutput();
 469                 $allCats = $out->getCategoryLinks();
 470
 471                 if ( !count( $allCats ) ) {
 472                         return '';
 473                 }
 474
 475                 $embed = "<li>";
 476                 $pop = "</li>";
 477
 478                 $s = '';
 479                 $colon = $this->msg( 'colon-separator' )->escaped();
 480
 481                 if ( !empty( $allCats['normal'] ) ) {
 482                         $t = $embed . implode( "{$pop}{$embed}", $allCats['normal'] ) . $pop;
 483
 484                         $msg = $this->msg( 'pagecategories' )->numParams( count( $allCats['normal'] ) )->escaped();
 485                         $linkPage = wfMessage( 'pagecategorieslink' )->inContentLanguage()->text();
 486                         $title = Title::newFromText( $linkPage );
 487                         $link = $title ? Linker::link( $title, $msg ) : $msg;
 488                         $s .= '<div id="mw-normal-catlinks" class="mw-normal-catlinks">' .
 489                                 $link . $colon . '<ul>' . $t . '</ul>' . '</div>';
 490                 }
 491
 492                 # Hidden categories
 493                 if ( isset( $allCats['hidden'] ) ) {
 494                         if ( $this->getUser()->getBoolOption( 'showhiddencats' ) ) {
 495                                 $class = ' mw-hidden-cats-user-shown';
 496                         } elseif ( $this->getTitle()->getNamespace() == NS_CATEGORY ) {
 497                                 $class = ' mw-hidden-cats-ns-shown';
 498                         } else {
 499                                 $class = ' mw-hidden-cats-hidden';
 500                         }
 501
 502                         $s .= "<div id=\"mw-hidden-catlinks\" class=\"mw-hidden-catlinks$class\">" .
 503                                 $this->msg( 'hidden-categories' )->numParams( count( $allCats['hidden'] ) )->escaped() .
 504                                 $colon . '<ul>' . $embed . implode( "{$pop}{$embed}", $allCats['hidden'] ) . $pop . '</ul>' .
 505                                 '</div>';
 506                 }
 507
 508                 # optional 'dmoz-like' category browser. Will be shown under the list
 509                 # of categories an article belong to
 510                 if ( $wgUseCategoryBrowser ) {
 511                         $s .= '<br /><hr />';
 512
 513                         # get a big array of the parents tree
 514                         $parenttree = $this->getTitle()->getParentCategoryTree();
 515                         # Skin object passed by reference cause it can not be
 516                         # accessed under the method subfunction drawCategoryBrowser
 517                         $tempout = explode( "\n", $this->drawCategoryBrowser( $parenttree ) );
 518                         # Clean out bogus first entry and sort them
 519                         unset( $tempout[0] );
 520                         asort( $tempout );
 521                         # Output one per line
 522                         $s .= implode( "<br />\n", $tempout );
 523                 }
 524
 525                 return $s;
 526         }
 527
 528         /**
 529          * Render the array as a series of links.
 530          * @param array $tree Categories tree returned by Title::getParentCategoryTree
 531          * @return string Separated by &gt;, terminate with "\n"
 532          */
 533         function drawCategoryBrowser( $tree ) {
 534                 $return = '';
 535
 536                 foreach ( $tree as $element => $parent ) {
 537                         if ( empty( $parent ) ) {
 538                                 # element start a new list
 539                                 $return .= "\n";
 540                         } else {
 541                                 # grab the others elements
 542                                 $return .= $this->drawCategoryBrowser( $parent ) . ' &gt; ';
 543                         }
 544
 545                         # add our current element to the list
 546                         $eltitle = Title::newFromText( $element );
 547                         $return .= Linker::link( $eltitle, htmlspecialchars( $eltitle->getText() ) );
 548                 }
 549
 550                 return $return;
 551         }
 552
 553         /**
 554          * @return string
 555          */
 556         function getCategories() {
 557                 $out = $this->getOutput();
 558
 559                 $catlinks = $this->getCategoryLinks();
 560
 561                 $classes = 'catlinks';
 562
 563                 // Check what we're showing
 564                 $allCats = $out->getCategoryLinks();
 565                 $showHidden = $this->getUser()->getBoolOption( 'showhiddencats' ) ||
 566                                                 $this->getTitle()->getNamespace() == NS_CATEGORY;
 567
 568                 if ( empty( $allCats['normal'] ) && !( !empty( $allCats['hidden'] ) && $showHidden ) ) {
 569                         $classes .= ' catlinks-allhidden';
 570                 }
 571
 572                 return "<div id='catlinks' class='$classes'>{$catlinks}</div>";
 573         }
 574
 575         /**
 576          * This runs a hook to allow extensions placing their stuff after content
 577          * and article metadata (e.g. categories).
 578          * Note: This function has nothing to do with afterContent().
 579          *
 580          * This hook is placed here in order to allow using the same hook for all
 581          * skins, both the SkinTemplate based ones and the older ones, which directly
 582          * use this class to get their data.
 583          *
 584          * The output of this function gets processed in SkinTemplate::outputPage() for
 585          * the SkinTemplate based skins, all other skins should directly echo it.
 586          *
 587          * @return string Empty by default, if not changed by any hook function.
 588          */
 589         protected function afterContentHook() {
 590                 $data = '';
 591
 592                 if ( Hooks::run( 'SkinAfterContent', array( &$data, $this ) ) ) {
 593                         // adding just some spaces shouldn't toggle the output
 594                         // of the whole <div/>, so we use trim() here
 595                         if ( trim( $data ) != '' ) {
 596                                 // Doing this here instead of in the skins to
 597                                 // ensure that the div has the same ID in all
 598                                 // skins
 599                                 $data = "<div id='mw-data-after-content'>\n" .
 600                                         "\t$data\n" .
 601                                         "</div>\n";
 602                         }
 603                 } else {
 604                         wfDebug( "Hook SkinAfterContent changed output processing.\n" );
 605                 }
 606
 607                 return $data;
 608         }
 609
 610         /**
 611          * Generate debug data HTML for displaying at the bottom of the main content
 612          * area.
 613          * @return string HTML containing debug data, if enabled (otherwise empty).
 614          */
 615         protected function generateDebugHTML() {
 616                 return MWDebug::getHTMLDebugLog();
 617         }
 618
 619         /**
 620          * This gets called shortly before the "</body>" tag.
 621          *
 622          * @return string HTML-wrapped JS code to be put before "</body>"
 623          */
 624         function bottomScripts() {
 625                 // TODO and the suckage continues. This function is really just a wrapper around
 626                 // OutputPage::getBottomScripts() which takes a Skin param. This should be cleaned
 627                 // up at some point
 628                 $bottomScriptText = $this->getOutput()->getBottomScripts();
 629                 Hooks::run( 'SkinAfterBottomScripts', array( $this, &$bottomScriptText ) );
 630
 631                 return $bottomScriptText;
 632         }
 633
 634         /**
 635          * Text with the permalink to the source page,
 636          * usually shown on the footer of a printed page
 637          *
 638          * @return string HTML text with an URL
 639          */
 640         function printSource() {
 641                 $oldid = $this->getRevisionId();
 642                 if ( $oldid ) {
 643                         $canonicalUrl = $this->getTitle()->getCanonicalURL( 'oldid=' . $oldid );
 644                         $url = htmlspecialchars( wfExpandIRI( $canonicalUrl ) );
 645                 } else {
 646                         // oldid not available for non existing pages
 647                         $url = htmlspecialchars( wfExpandIRI( $this->getTitle()->getCanonicalURL() ) );
 648                 }
 649
 650                 return $this->msg( 'retrievedfrom' )
 651                         ->rawParams( '<a dir="ltr" href="' . $url . '">' . $url . '</a>' )
 652                         ->parse();
 653         }
 654
 655         /**
 656          * @return string HTML
 657          */
 658         function getUndeleteLink() {
 659                 $action = $this->getRequest()->getVal( 'action', 'view' );
 660
 661                 if ( $this->getTitle()->userCan( 'deletedhistory', $this->getUser() ) &&
 662                         ( !$this->getTitle()->exists() || $action == 'history' ) ) {
 663                         $n = $this->getTitle()->isDeleted();
 664
 665                         if ( $n ) {
 666                                 if ( $this->getTitle()->quickUserCan( 'undelete', $this->getUser() ) ) {
 667                                         $msg = 'thisisdeleted';
 668                                 } else {
 669                                         $msg = 'viewdeleted';
 670                                 }
 671
 672                                 return $this->msg( $msg )->rawParams(
 673                                         Linker::linkKnown(
 674                                                 SpecialPage::getTitleFor( 'Undelete', $this->getTitle()->getPrefixedDBkey() ),
 675                                                 $this->msg( 'restorelink' )->numParams( $n )->escaped() )
 676                                         )->escaped();
 677                         }
 678                 }
 679
 680                 return '';
 681         }
 682
 683         /**
 684          * @return string
 685          */
 686         function subPageSubtitle() {
 687                 $out = $this->getOutput();
 688                 $subpages = '';
 689
 690                 if ( !Hooks::run( 'SkinSubPageSubtitle', array( &$subpages, $this, $out ) ) ) {
 691                         return $subpages;
 692                 }
 693
 694                 if ( $out->isArticle() && MWNamespace::hasSubpages( $out->getTitle()->getNamespace() ) ) {
 695                         $ptext = $this->getTitle()->getPrefixedText();
 696                         if ( preg_match( '/\//', $ptext ) ) {
 697                                 $links = explode( '/', $ptext );
 698                                 array_pop( $links );
 699                                 $c = 0;
 700                                 $growinglink = '';
 701                                 $display = '';
 702                                 $lang = $this->getLanguage();
 703
 704                                 foreach ( $links as $link ) {
 705                                         $growinglink .= $link;
 706                                         $display .= $link;
 707                                         $linkObj = Title::newFromText( $growinglink );
 708
 709                                         if ( is_object( $linkObj ) && $linkObj->isKnown() ) {
 710                                                 $getlink = Linker::linkKnown(
 711                                                         $linkObj,
 712                                                         htmlspecialchars( $display )
 713                                                 );
 714
 715                                                 $c++;
 716
 717                                                 if ( $c > 1 ) {
 718                                                         $subpages .= $lang->getDirMarkEntity() . $this->msg( 'pipe-separator' )->escaped();
 719                                                 } else {
 720                                                         $subpages .= '&lt; ';
 721                                                 }
 722
 723                                                 $subpages .= $getlink;
 724                                                 $display = '';
 725                                         } else {
 726                                                 $display .= '/';
 727                                         }
 728                                         $growinglink .= '/';
 729                                 }
 730                         }
 731                 }
 732
 733                 return $subpages;
 734         }
 735
 736         /**
 737          * Returns true if the IP should be shown in the header
 738          * @return bool
 739          */
 740         function showIPinHeader() {
 741                 global $wgShowIPinHeader;
 742                 return $wgShowIPinHeader && session_id() != '';
 743         }
 744
 745         /**
 746          * @return string
 747          */
 748         function getSearchLink() {
 749                 $searchPage = SpecialPage::getTitleFor( 'Search' );
 750                 return $searchPage->getLocalURL();
 751         }
 752
 753         /**
 754          * @return string
 755          */
 756         function escapeSearchLink() {
 757                 return htmlspecialchars( $this->getSearchLink() );
 758         }
 759
 760         /**
 761          * @param string $type
 762          * @return string
 763          */
 764         function getCopyright( $type = 'detect' ) {
 765                 global $wgRightsPage, $wgRightsUrl, $wgRightsText;
 766
 767                 if ( $type == 'detect' ) {
 768                         if ( !$this->isRevisionCurrent()
 769                                 && !$this->msg( 'history_copyright' )->inContentLanguage()->isDisabled()
 770                         ) {
 771                                 $type = 'history';
 772                         } else {
 773                                 $type = 'normal';
 774                         }
 775                 }
 776
 777                 if ( $type == 'history' ) {
 778                         $msg = 'history_copyright';
 779                 } else {
 780                         $msg = 'copyright';
 781                 }
 782
 783                 if ( $wgRightsPage ) {
 784                         $title = Title::newFromText( $wgRightsPage );
 785                         $link = Linker::linkKnown( $title, $wgRightsText );
 786                 } elseif ( $wgRightsUrl ) {
 787                         $link = Linker::makeExternalLink( $wgRightsUrl, $wgRightsText );
 788                 } elseif ( $wgRightsText ) {
 789                         $link = $wgRightsText;
 790                 } else {
 791                         # Give up now
 792                         return '';
 793                 }
 794
 795                 // Allow for site and per-namespace customization of copyright notice.
 796                 // @todo Remove deprecated $forContent param from hook handlers and then remove here.
 797                 $forContent = true;
 798
 799                 Hooks::run(
 800                         'SkinCopyrightFooter',
 801                         array( $this->getTitle(), $type, &$msg, &$link, &$forContent )
 802                 );
 803
 804                 return $this->msg( $msg )->rawParams( $link )->text();
 805         }
 806
 807         /**
 808          * @return null|string
 809          */
 810         function getCopyrightIcon() {
 811                 global $wgRightsUrl, $wgRightsText, $wgRightsIcon, $wgCopyrightIcon;
 812
 813                 $out = '';
 814
 815                 if ( $wgCopyrightIcon ) {
 816                         $out = $wgCopyrightIcon;
 817                 } elseif ( $wgRightsIcon ) {
 818                         $icon = htmlspecialchars( $wgRightsIcon );
 819
 820                         if ( $wgRightsUrl ) {
 821                                 $url = htmlspecialchars( $wgRightsUrl );
 822                                 $out .= '<a href="' . $url . '">';
 823                         }
 824
 825                         $text = htmlspecialchars( $wgRightsText );
 826                         $out .= "<img src=\"$icon\" alt=\"$text\" width=\"88\" height=\"31\" />";
 827
 828                         if ( $wgRightsUrl ) {
 829                                 $out .= '</a>';
 830                         }
 831                 }
 832
 833                 return $out;
 834         }
 835
 836         /**
 837          * Gets the powered by MediaWiki icon.
 838          * @return string
 839          */
 840         function getPoweredBy() {
 841                 global $wgResourceBasePath;
 842
 843                 $url1 = htmlspecialchars(
 844                         "$wgResourceBasePath/resources/assets/poweredby_mediawiki_88x31.png"
 845                 );
 846                 $url1_5 = htmlspecialchars(
 847                         "$wgResourceBasePath/resources/assets/poweredby_mediawiki_132x47.png"
 848                 );
 849                 $url2 = htmlspecialchars(
 850                         "$wgResourceBasePath/resources/assets/poweredby_mediawiki_176x62.png"
 851                 );
 852                 $text = '<a href="//www.mediawiki.org/"><img src="' . $url1
 853                         . '" srcset="' . $url1_5 . ' 1.5x, ' . $url2 . ' 2x" '
 854                         . 'height="31" width="88" alt="Powered by MediaWiki" /></a>';
 855                 Hooks::run( 'SkinGetPoweredBy', array( &$text, $this ) );
 856                 return $text;
 857         }
 858
 859         /**
 860          * Get the timestamp of the latest revision, formatted in user language
 861          *
 862          * @return string
 863          */
 864         protected function lastModified() {
 865                 $timestamp = $this->getOutput()->getRevisionTimestamp();
 866
 867                 # No cached timestamp, load it from the database
 868                 if ( $timestamp === null ) {
 869                         $timestamp = Revision::getTimestampFromId( $this->getTitle(), $this->getRevisionId() );
 870                 }
 871
 872                 if ( $timestamp ) {
 873                         $d = $this->getLanguage()->userDate( $timestamp, $this->getUser() );
 874                         $t = $this->getLanguage()->userTime( $timestamp, $this->getUser() );
 875                         $s = ' ' . $this->msg( 'lastmodifiedat', $d, $t )->parse();
 876                 } else {
 877                         $s = '';
 878                 }
 879
 880                 if ( wfGetLB()->getLaggedSlaveMode() ) {
 881                         $s .= ' <strong>' . $this->msg( 'laggedslavemode' )->parse() . '</strong>';
 882                 }
 883
 884                 return $s;
 885         }
 886
 887         /**
 888          * @param string $align
 889          * @return string
 890          */
 891         function logoText( $align = '' ) {
 892                 if ( $align != '' ) {
 893                         $a = " style='float: {$align};'";
 894                 } else {
 895                         $a = '';
 896                 }
 897
 898                 $mp = $this->msg( 'mainpage' )->escaped();
 899                 $mptitle = Title::newMainPage();
 900                 $url = ( is_object( $mptitle ) ? htmlspecialchars( $mptitle->getLocalURL() ) : '' );
 901
 902                 $logourl = $this->getLogo();
 903                 $s = "<a href='{$url}'><img{$a} src='{$logourl}' alt='[{$mp}]' /></a>";
 904
 905                 return $s;
 906         }
 907
 908         /**
 909          * Renders a $wgFooterIcons icon according to the method's arguments
 910          * @param array $icon The icon to build the html for, see $wgFooterIcons
 911          *   for the format of this array.
 912          * @param bool|string $withImage Whether to use the icon's image or output
 913          *   a text-only footericon.
 914          * @return string HTML
 915          */
 916         function makeFooterIcon( $icon, $withImage = 'withImage' ) {
 917                 if ( is_string( $icon ) ) {
 918                         $html = $icon;
 919                 } else { // Assuming array
 920                         $url = isset( $icon["url"] ) ? $icon["url"] : null;
 921                         unset( $icon["url"] );
 922                         if ( isset( $icon["src"] ) && $withImage === 'withImage' ) {
 923                                 // do this the lazy way, just pass icon data as an attribute array
 924                                 $html = Html::element( 'img', $icon );
 925                         } else {
 926                                 $html = htmlspecialchars( $icon["alt"] );
 927                         }
 928                         if ( $url ) {
 929                                 $html = Html::rawElement( 'a', array( "href" => $url ), $html );
 930                         }
 931                 }
 932                 return $html;
 933         }
 934
 935         /**
 936          * Gets the link to the wiki's main page.
 937          * @return string
 938          */
 939         function mainPageLink() {
 940                 $s = Linker::linkKnown(
 941                         Title::newMainPage(),
 942                         $this->msg( 'mainpage' )->escaped()
 943                 );
 944
 945                 return $s;
 946         }
 947
 948         /**
 949          * Returns an HTML link for use in the footer
 950          * @param string $desc The i18n message key for the link text
 951          * @param string $page The i18n message key for the page to link to
 952          * @return string HTML anchor
 953          */
 954         public function footerLink( $desc, $page ) {
 955                 // if the link description has been set to "-" in the default language,
 956                 if ( $this->msg( $desc )->inContentLanguage()->isDisabled() ) {
 957                         // then it is disabled, for all languages.
 958                         return '';
 959                 } else {
 960                         // Otherwise, we display the link for the user, described in their
 961                         // language (which may or may not be the same as the default language),
 962                         // but we make the link target be the one site-wide page.
 963                         $title = Title::newFromText( $this->msg( $page )->inContentLanguage()->text() );
 964
 965                         if ( !$title ) {
 966                                 return '';
 967                         }
 968
 969                         return Linker::linkKnown(
 970                                 $title,
 971                                 $this->msg( $desc )->escaped()
 972                         );
 973                 }
 974         }
 975
 976         /**
 977          * Gets the link to the wiki's privacy policy page.
 978          * @return string HTML
 979          */
 980         function privacyLink() {
 981                 return $this->footerLink( 'privacy', 'privacypage' );
 982         }
 983
 984         /**
 985          * Gets the link to the wiki's about page.
 986          * @return string HTML
 987          */
 988         function aboutLink() {
 989                 return $this->footerLink( 'aboutsite', 'aboutpage' );
 990         }
 991
 992         /**
 993          * Gets the link to the wiki's general disclaimers page.
 994          * @return string HTML
 995          */
 996         function disclaimerLink() {
 997                 return $this->footerLink( 'disclaimers', 'disclaimerpage' );
 998         }
 999
1000         /**
1001          * Return URL options for the 'edit page' link.
1002          * This may include an 'oldid' specifier, if the current page view is such.
1003          *
1004          * @return array
1005          * @private
1006          */
1007         function editUrlOptions() {
1008                 $options = array( 'action' => 'edit' );
1009
1010                 if ( !$this->isRevisionCurrent() ) {
1011                         $options['oldid'] = intval( $this->getRevisionId() );
1012                 }
1013
1014                 return $options;
1015         }
1016
1017         /**
1018          * @param User|int $id
1019          * @return bool
1020          */
1021         function showEmailUser( $id ) {
1022                 if ( $id instanceof User ) {
1023                         $targetUser = $id;
1024                 } else {
1025                         $targetUser = User::newFromId( $id );
1026                 }
1027
1028                 # The sending user must have a confirmed email address and the target
1029                 # user must have a confirmed email address and allow emails from users.
1030                 return $this->getUser()->canSendEmail() &&
1031                         $targetUser->canReceiveEmail();
1032         }
1033
1034         /**
1035          * This function previously returned a fully resolved style path URL to images or styles stored in
1036          * the legacy skins/common/ directory.
1037          *
1038          * That directory has been removed in 1.24 and the function always returns an empty string.
1039          *
1040          * @deprecated since 1.24
1041          * @param string $name The name or path of a skin resource file
1042          * @return string Empty string
1043          */
1044         function getCommonStylePath( $name ) {
1045                 wfDeprecated( __METHOD__, '1.24' );
1046                 return '';
1047         }
1048
1049         /**
1050          * Return a fully resolved style path url to images or styles stored in the current skins's folder.
1051          * This method returns a url resolved using the configured skin style path
1052          * and includes the style version inside of the url.
1053          *
1054          * Requires $stylename to be set, otherwise throws MWException.
1055          *
1056          * @param string $name The name or path of a skin resource file
1057          * @return string The fully resolved style path url including styleversion
1058          * @throws MWException
1059          */
1060         function getSkinStylePath( $name ) {
1061                 global $wgStylePath, $wgStyleVersion;
1062
1063                 if ( $this->stylename === null ) {
1064                         $class = get_class( $this );
1065                         throw new MWException( "$class::\$stylename must be set to use getSkinStylePath()" );
1066                 }
1067
1068                 return "$wgStylePath/{$this->stylename}/$name?$wgStyleVersion";
1069         }
1070
1071         /* these are used extensively in SkinTemplate, but also some other places */
1072
1073         /**
1074          * @param string $urlaction
1075          * @return string
1076          */
1077         static function makeMainPageUrl( $urlaction = '' ) {
1078                 $title = Title::newMainPage();
1079                 self::checkTitle( $title, '' );
1080
1081                 return $title->getLocalURL( $urlaction );
1082         }
1083
1084         /**
1085          * Make a URL for a Special Page using the given query and protocol.
1086          *
1087          * If $proto is set to null, make a local URL. Otherwise, make a full
1088          * URL with the protocol specified.
1089          *
1090          * @param string $name Name of the Special page
1091          * @param string $urlaction Query to append
1092          * @param string|null $proto Protocol to use or null for a local URL
1093          * @return string
1094          */
1095         static function makeSpecialUrl( $name, $urlaction = '', $proto = null ) {
1096                 $title = SpecialPage::getSafeTitleFor( $name );
1097                 if ( is_null( $proto ) ) {
1098                         return $title->getLocalURL( $urlaction );
1099                 } else {
1100                         return $title->getFullURL( $urlaction, false, $proto );
1101                 }
1102         }
1103
1104         /**
1105          * @param string $name
1106          * @param string $subpage
1107          * @param string $urlaction
1108          * @return string
1109          */
1110         static function makeSpecialUrlSubpage( $name, $subpage, $urlaction = '' ) {
1111                 $title = SpecialPage::getSafeTitleFor( $name, $subpage );
1112                 return $title->getLocalURL( $urlaction );
1113         }
1114
1115         /**
1116          * @param string $name
1117          * @param string $urlaction
1118          * @return string
1119          */
1120         static function makeI18nUrl( $name, $urlaction = '' ) {
1121                 $title = Title::newFromText( wfMessage( $name )->inContentLanguage()->text() );
1122                 self::checkTitle( $title, $name );
1123                 return $title->getLocalURL( $urlaction );
1124         }
1125
1126         /**
1127          * @param string $name
1128          * @param string $urlaction
1129          * @return string
1130          */
1131         static function makeUrl( $name, $urlaction = '' ) {
1132                 $title = Title::newFromText( $name );
1133                 self::checkTitle( $title, $name );
1134
1135                 return $title->getLocalURL( $urlaction );
1136         }
1137
1138         /**
1139          * If url string starts with http, consider as external URL, else
1140          * internal
1141          * @param string $name
1142          * @return string URL
1143          */
1144         static function makeInternalOrExternalUrl( $name ) {
1145                 if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $name ) ) {
1146                         return $name;
1147                 } else {
1148                         return self::makeUrl( $name );
1149                 }
1150         }
1151
1152         /**
1153          * this can be passed the NS number as defined in Language.php
1154          * @param string $name
1155          * @param string $urlaction
1156          * @param int $namespace
1157          * @return string
1158          */
1159         static function makeNSUrl( $name, $urlaction = '', $namespace = NS_MAIN ) {
1160                 $title = Title::makeTitleSafe( $namespace, $name );
1161                 self::checkTitle( $title, $name );
1162
1163                 return $title->getLocalURL( $urlaction );
1164         }
1165
1166         /**
1167          * these return an array with the 'href' and boolean 'exists'
1168          * @param string $name
1169          * @param string $urlaction
1170          * @return array
1171          */
1172         static function makeUrlDetails( $name, $urlaction = '' ) {
1173                 $title = Title::newFromText( $name );
1174                 self::checkTitle( $title, $name );
1175
1176                 return array(
1177                         'href' => $title->getLocalURL( $urlaction ),
1178                         'exists' => $title->isKnown(),
1179                 );
1180         }
1181
1182         /**
1183          * Make URL details where the article exists (or at least it's convenient to think so)
1184          * @param string $name Article name
1185          * @param string $urlaction
1186          * @return array
1187          */
1188         static function makeKnownUrlDetails( $name, $urlaction = '' ) {
1189                 $title = Title::newFromText( $name );
1190                 self::checkTitle( $title, $name );
1191
1192                 return array(
1193                         'href' => $title->getLocalURL( $urlaction ),
1194                         'exists' => true
1195                 );
1196         }
1197
1198         /**
1199          * make sure we have some title to operate on
1200          *
1201          * @param Title $title
1202          * @param string $name
1203          */
1204         static function checkTitle( &$title, $name ) {
1205                 if ( !is_object( $title ) ) {
1206                         $title = Title::newFromText( $name );
1207                         if ( !is_object( $title ) ) {
1208                                 $title = Title::newFromText( '--error: link target missing--' );
1209                         }
1210                 }
1211         }
1212
1213         /**
1214          * Build an array that represents the sidebar(s), the navigation bar among them.
1215          *
1216          * BaseTemplate::getSidebar can be used to simplify the format and id generation in new skins.
1217          *
1218          * The format of the returned array is array( heading => content, ... ), where:
1219          * - heading is the heading of a navigation portlet. It is either:
1220          *   - magic string to be handled by the skins ('SEARCH' / 'LANGUAGES' / 'TOOLBOX' / ...)
1221          *   - a message name (e.g. 'navigation'), the message should be HTML-escaped by the skin
1222          *   - plain text, which should be HTML-escaped by the skin
1223          * - content is the contents of the portlet. It is either:
1224          *   - HTML text (<ul><li>...</li>...</ul>)
1225          *   - array of link data in a format accepted by BaseTemplate::makeListItem()
1226          *   - (for a magic string as a key, any value)
1227          *
1228          * Note that extensions can control the sidebar contents using the SkinBuildSidebar hook
1229          * and can technically insert anything in here; skin creators are expected to handle
1230          * values described above.
1231          *
1232          * @return array
1233          */
1234         function buildSidebar() {
1235                 global $wgEnableSidebarCache, $wgSidebarCacheExpiry;
1236
1237                 $cache = ObjectCache::getMainWANInstance();
1238                 $key = wfMemcKey( 'sidebar', $this->getLanguage()->getCode() );
1239
1240                 if ( $wgEnableSidebarCache ) {
1241                         $cachedsidebar = $cache->get( $key );
1242                         if ( $cachedsidebar ) {
1243                                 Hooks::run( 'SidebarBeforeOutput', array( $this, &$cachedsidebar ) );
1244
1245                                 return $cachedsidebar;
1246                         }
1247                 }
1248
1249                 $bar = array();
1250                 $this->addToSidebar( $bar, 'sidebar' );
1251
1252                 Hooks::run( 'SkinBuildSidebar', array( $this, &$bar ) );
1253                 if ( $wgEnableSidebarCache ) {
1254                         $cache->set( $key, $bar, $wgSidebarCacheExpiry );
1255                 }
1256
1257                 Hooks::run( 'SidebarBeforeOutput', array( $this, &$bar ) );
1258
1259                 return $bar;
1260         }
1261
1262         /**
1263          * Add content from a sidebar system message
1264          * Currently only used for MediaWiki:Sidebar (but may be used by Extensions)
1265          *
1266          * This is just a wrapper around addToSidebarPlain() for backwards compatibility
1267          *
1268          * @param array $bar
1269          * @param string $message
1270          */
1271         function addToSidebar( &$bar, $message ) {
1272                 $this->addToSidebarPlain( $bar, wfMessage( $message )->inContentLanguage()->plain() );
1273         }
1274
1275         /**
1276          * Add content from plain text
1277          * @since 1.17
1278          * @param array $bar
1279          * @param string $text
1280          * @return array
1281          */
1282         function addToSidebarPlain( &$bar, $text ) {
1283                 $lines = explode( "\n", $text );
1284
1285                 $heading = '';
1286
1287                 foreach ( $lines as $line ) {
1288                         if ( strpos( $line, '*' ) !== 0 ) {
1289                                 continue;
1290                         }
1291                         $line = rtrim( $line, "\r" ); // for Windows compat
1292
1293                         if ( strpos( $line, '**' ) !== 0 ) {
1294                                 $heading = trim( $line, '* ' );
1295                                 if ( !array_key_exists( $heading, $bar ) ) {
1296                                         $bar[$heading] = array();
1297                                 }
1298                         } else {
1299                                 $line = trim( $line, '* ' );
1300
1301                                 if ( strpos( $line, '|' ) !== false ) { // sanity check
1302                                         $line = MessageCache::singleton()->transform( $line, false, null, $this->getTitle() );
1303                                         $line = array_map( 'trim', explode( '|', $line, 2 ) );
1304                                         if ( count( $line ) !== 2 ) {
1305                                                 // Second sanity check, could be hit by people doing
1306                                                 // funky stuff with parserfuncs... (bug 33321)
1307                                                 continue;
1308                                         }
1309
1310                                         $extraAttribs = array();
1311
1312                                         $msgLink = $this->msg( $line[0] )->inContentLanguage();
1313                                         if ( $msgLink->exists() ) {
1314                                                 $link = $msgLink->text();
1315                                                 if ( $link == '-' ) {
1316                                                         continue;
1317                                                 }
1318                                         } else {
1319                                                 $link = $line[0];
1320                                         }
1321                                         $msgText = $this->msg( $line[1] );
1322                                         if ( $msgText->exists() ) {
1323                                                 $text = $msgText->text();
1324                                         } else {
1325                                                 $text = $line[1];
1326                                         }
1327
1328                                         if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $link ) ) {
1329                                                 $href = $link;
1330
1331                                                 // Parser::getExternalLinkAttribs won't work here because of the Namespace things
1332                                                 global $wgNoFollowLinks, $wgNoFollowDomainExceptions;
1333                                                 if ( $wgNoFollowLinks && !wfMatchesDomainList( $href, $wgNoFollowDomainExceptions ) ) {
1334                                                         $extraAttribs['rel'] = 'nofollow';
1335                                                 }
1336
1337                                                 global $wgExternalLinkTarget;
1338                                                 if ( $wgExternalLinkTarget ) {
1339                                                         $extraAttribs['target'] = $wgExternalLinkTarget;
1340                                                 }
1341                                         } else {
1342                                                 $title = Title::newFromText( $link );
1343
1344                                                 if ( $title ) {
1345                                                         $title = $title->fixSpecialName();
1346                                                         $href = $title->getLinkURL();
1347                                                 } else {
1348                                                         $href = 'INVALID-TITLE';
1349                                                 }
1350                                         }
1351
1352                                         $bar[$heading][] = array_merge( array(
1353                                                 'text' => $text,
1354                                                 'href' => $href,
1355                                                 'id' => 'n-' . Sanitizer::escapeId( strtr( $line[1], ' ', '-' ), 'noninitial' ),
1356                                                 'active' => false
1357                                         ), $extraAttribs );
1358                                 } else {
1359                                         continue;
1360                                 }
1361                         }
1362                 }
1363
1364                 return $bar;
1365         }
1366
1367         /**
1368          * This function previously controlled whether the 'mediawiki.legacy.wikiprintable' module
1369          * should be loaded by OutputPage. That module no longer exists and the return value of this
1370          * method is ignored.
1371          *
1372          * If your skin doesn't provide its own print styles, the 'mediawiki.legacy.commonPrint' module
1373          * can be used instead (SkinTemplate-based skins do it automatically).
1374          *
1375          * @deprecated since 1.22
1376          * @return bool
1377          */
1378         public function commonPrintStylesheet() {
1379                 wfDeprecated( __METHOD__, '1.22' );
1380                 return false;
1381         }
1382
1383         /**
1384          * Gets new talk page messages for the current user and returns an
1385          * appropriate alert message (or an empty string if there are no messages)
1386          * @return string
1387          */
1388         function getNewtalks() {
1389
1390                 $newMessagesAlert = '';
1391                 $user = $this->getUser();
1392                 $newtalks = $user->getNewMessageLinks();
1393                 $out = $this->getOutput();
1394
1395                 // Allow extensions to disable or modify the new messages alert
1396                 if ( !Hooks::run( 'GetNewMessagesAlert', array( &$newMessagesAlert, $newtalks, $user, $out ) ) ) {
1397                         return '';
1398                 }
1399                 if ( $newMessagesAlert ) {
1400                         return $newMessagesAlert;
1401                 }
1402
1403                 if ( count( $newtalks ) == 1 && $newtalks[0]['wiki'] === wfWikiID() ) {
1404                         $uTalkTitle = $user->getTalkPage();
1405                         $lastSeenRev = isset( $newtalks[0]['rev'] ) ? $newtalks[0]['rev'] : null;
1406                         $nofAuthors = 0;
1407                         if ( $lastSeenRev !== null ) {
1408                                 $plural = true; // Default if we have a last seen revision: if unknown, use plural
1409                                 $latestRev = Revision::newFromTitle( $uTalkTitle, false, Revision::READ_NORMAL );
1410                                 if ( $latestRev !== null ) {
1411                                         // Singular if only 1 unseen revision, plural if several unseen revisions.
1412                                         $plural = $latestRev->getParentId() !== $lastSeenRev->getId();
1413                                         $nofAuthors = $uTalkTitle->countAuthorsBetween(
1414                                                 $lastSeenRev, $latestRev, 10, 'include_new' );
1415                                 }
1416                         } else {
1417                                 // Singular if no revision -> diff link will show latest change only in any case
1418                                 $plural = false;
1419                         }
1420                         $plural = $plural ? 999 : 1;
1421                         // 999 signifies "more than one revision". We don't know how many, and even if we did,
1422                         // the number of revisions or authors is not necessarily the same as the number of
1423                         // "messages".
1424                         $newMessagesLink = Linker::linkKnown(
1425                                 $uTalkTitle,
1426                                 $this->msg( 'newmessageslinkplural' )->params( $plural )->escaped(),
1427                                 array(),
1428                                 array( 'redirect' => 'no' )
1429                         );
1430
1431                         $newMessagesDiffLink = Linker::linkKnown(
1432                                 $uTalkTitle,
1433                                 $this->msg( 'newmessagesdifflinkplural' )->params( $plural )->escaped(),
1434                                 array(),
1435                                 $lastSeenRev !== null
1436                                         ? array( 'oldid' => $lastSeenRev->getId(), 'diff' => 'cur' )
1437                                         : array( 'diff' => 'cur' )
1438                         );
1439
1440                         if ( $nofAuthors >= 1 && $nofAuthors <= 10 ) {
1441                                 $newMessagesAlert = $this->msg(
1442                                         'youhavenewmessagesfromusers',
1443                                         $newMessagesLink,
1444                                         $newMessagesDiffLink
1445                                 )->numParams( $nofAuthors, $plural );
1446                         } else {
1447                                 // $nofAuthors === 11 signifies "11 or more" ("more than 10")
1448                                 $newMessagesAlert = $this->msg(
1449                                         $nofAuthors > 10 ? 'youhavenewmessagesmanyusers' : 'youhavenewmessages',
1450                                         $newMessagesLink,
1451                                         $newMessagesDiffLink
1452                                 )->numParams( $plural );
1453                         }
1454                         $newMessagesAlert = $newMessagesAlert->text();
1455                         # Disable Squid cache
1456                         $out->setSquidMaxage( 0 );
1457                 } elseif ( count( $newtalks ) ) {
1458                         $sep = $this->msg( 'newtalkseparator' )->escaped();
1459                         $msgs = array();
1460
1461                         foreach ( $newtalks as $newtalk ) {
1462                                 $msgs[] = Xml::element(
1463                                         'a',
1464                                         array( 'href' => $newtalk['link'] ), $newtalk['wiki']
1465                                 );
1466                         }
1467                         $parts = implode( $sep, $msgs );
1468                         $newMessagesAlert = $this->msg( 'youhavenewmessagesmulti' )->rawParams( $parts )->escaped();
1469                         $out->setSquidMaxage( 0 );
1470                 }
1471
1472                 return $newMessagesAlert;
1473         }
1474
1475         /**
1476          * Get a cached notice
1477          *
1478          * @param string $name Message name, or 'default' for $wgSiteNotice
1479          * @return string|bool HTML fragment, or false to indicate that the caller
1480          *   should fall back to the next notice in its sequence
1481          */
1482         private function getCachedNotice( $name ) {
1483                 global $wgRenderHashAppend, $parserMemc, $wgContLang;
1484
1485                 $needParse = false;
1486
1487                 if ( $name === 'default' ) {
1488                         // special case
1489                         global $wgSiteNotice;
1490                         $notice = $wgSiteNotice;
1491                         if ( empty( $notice ) ) {
1492                                 return false;
1493                         }
1494                 } else {
1495                         $msg = $this->msg( $name )->inContentLanguage();
1496                         if ( $msg->isBlank() ) {
1497                                 return '';
1498                         } elseif ( $msg->isDisabled() ) {
1499                                 return false;
1500                         }
1501                         $notice = $msg->plain();
1502                 }
1503
1504                 // Use the extra hash appender to let eg SSL variants separately cache.
1505                 $key = wfMemcKey( $name . $wgRenderHashAppend );
1506                 $cachedNotice = $parserMemc->get( $key );
1507                 if ( is_array( $cachedNotice ) ) {
1508                         if ( md5( $notice ) == $cachedNotice['hash'] ) {
1509                                 $notice = $cachedNotice['html'];
1510                         } else {
1511                                 $needParse = true;
1512                         }
1513                 } else {
1514                         $needParse = true;
1515                 }
1516
1517                 if ( $needParse ) {
1518                         $parsed = $this->getOutput()->parse( $notice );
1519                         $parserMemc->set( $key, array( 'html' => $parsed, 'hash' => md5( $notice ) ), 600 );
1520                         $notice = $parsed;
1521                 }
1522
1523                 $notice = Html::rawElement( 'div', array( 'id' => 'localNotice',
1524                         'lang' => $wgContLang->getHtmlCode(), 'dir' => $wgContLang->getDir() ), $notice );
1525                 return $notice;
1526         }
1527
1528         /**
1529          * Get a notice based on page's namespace
1530          *
1531          * @return string HTML fragment
1532          */
1533         function getNamespaceNotice() {
1534
1535                 $key = 'namespacenotice-' . $this->getTitle()->getNsText();
1536                 $namespaceNotice = $this->getCachedNotice( $key );
1537                 if ( $namespaceNotice && substr( $namespaceNotice, 0, 7 ) != '<p>&lt;' ) {
1538                         $namespaceNotice = '<div id="namespacebanner">' . $namespaceNotice . '</div>';
1539                 } else {
1540                         $namespaceNotice = '';
1541                 }
1542
1543                 return $namespaceNotice;
1544         }
1545
1546         /**
1547          * Get the site notice
1548          *
1549          * @return string HTML fragment
1550          */
1551         function getSiteNotice() {
1552                 $siteNotice = '';
1553
1554                 if ( Hooks::run( 'SiteNoticeBefore', array( &$siteNotice, $this ) ) ) {
1555                         if ( is_object( $this->getUser() ) && $this->getUser()->isLoggedIn() ) {
1556                                 $siteNotice = $this->getCachedNotice( 'sitenotice' );
1557                         } else {
1558                                 $anonNotice = $this->getCachedNotice( 'anonnotice' );
1559                                 if ( $anonNotice === false ) {
1560                                         $siteNotice = $this->getCachedNotice( 'sitenotice' );
1561                                 } else {
1562                                         $siteNotice = $anonNotice;
1563                                 }
1564                         }
1565                         if ( $siteNotice === false ) {
1566                                 $siteNotice = $this->getCachedNotice( 'default' );
1567                         }
1568                 }
1569
1570                 Hooks::run( 'SiteNoticeAfter', array( &$siteNotice, $this ) );
1571                 return $siteNotice;
1572         }
1573
1574         /**
1575          * Create a section edit link.  This supersedes editSectionLink() and
1576          * editSectionLinkForOther().
1577          *
1578          * @param Title $nt The title being linked to (may not be the same as
1579          *   the current page, if the section is included from a template)
1580          * @param string $section The designation of the section being pointed to,
1581          *   to be included in the link, like "&section=$section"
1582          * @param string $tooltip The tooltip to use for the link: will be escaped
1583          *   and wrapped in the 'editsectionhint' message
1584          * @param string $lang Language code
1585          * @return string HTML to use for edit link
1586          */
1587         public function doEditSectionLink( Title $nt, $section, $tooltip = null, $lang = false ) {
1588                 // HTML generated here should probably have userlangattributes
1589                 // added to it for LTR text on RTL pages
1590
1591                 $lang = wfGetLangObj( $lang );
1592
1593                 $attribs = array();
1594                 if ( !is_null( $tooltip ) ) {
1595                         # Bug 25462: undo double-escaping.
1596                         $tooltip = Sanitizer::decodeCharReferences( $tooltip );
1597                         $attribs['title'] = wfMessage( 'editsectionhint' )->rawParams( $tooltip )
1598                                 ->inLanguage( $lang )->text();
1599                 }
1600
1601                 $links = array(
1602                         'editsection' => array(
1603                                 'text' => wfMessage( 'editsection' )->inLanguage( $lang )->escaped(),
1604                                 'targetTitle' => $nt,
1605                                 'attribs' => $attribs,
1606                                 'query' => array( 'action' => 'edit', 'section' => $section ),
1607                                 'options' => array( 'noclasses', 'known' )
1608                         )
1609                 );
1610
1611                 Hooks::run( 'SkinEditSectionLinks', array( $this, $nt, $section, $tooltip, &$links, $lang ) );
1612
1613                 $result = '<span class="mw-editsection"><span class="mw-editsection-bracket">[</span>';
1614
1615                 $linksHtml = array();
1616                 foreach ( $links as $k => $linkDetails ) {
1617                         $linksHtml[] = Linker::link(
1618                                 $linkDetails['targetTitle'],
1619                                 $linkDetails['text'],
1620                                 $linkDetails['attribs'],
1621                                 $linkDetails['query'],
1622                                 $linkDetails['options']
1623                         );
1624                 }
1625
1626                 $result .= implode(
1627                         '<span class="mw-editsection-divider">'
1628                                 . wfMessage( 'pipe-separator' )->inLanguage( $lang )->text()
1629                                 . '</span>',
1630                         $linksHtml
1631                 );
1632
1633                 $result .= '<span class="mw-editsection-bracket">]</span></span>';
1634                 // Deprecated, use SkinEditSectionLinks hook instead
1635                 Hooks::run(
1636                         'DoEditSectionLink',
1637                         array( $this, $nt, $section, $tooltip, &$result, $lang ),
1638                         '1.25'
1639                 );
1640                 return $result;
1641         }
1642
1643         /**
1644          * Use PHP's magic __call handler to intercept legacy calls to the linker
1645          * for backwards compatibility.
1646          *
1647          * @param string $fname Name of called method
1648          * @param array $args Arguments to the method
1649          * @throws MWException
1650          * @return mixed
1651          */
1652         function __call( $fname, $args ) {
1653                 $realFunction = array( 'Linker', $fname );
1654                 if ( is_callable( $realFunction ) ) {
1655                         wfDeprecated( get_class( $this ) . '::' . $fname, '1.21' );
1656                         return call_user_func_array( $realFunction, $args );
1657                 } else {
1658                         $className = get_class( $this );
1659                         throw new MWException( "Call to undefined method $className::$fname" );
1660                 }
1661         }
1662
1663 }