includes/Skin.php

   1 <?php
   2 /**
   3  * @defgroup Skins Skins
   4  */
   5
   6 if ( !defined( 'MEDIAWIKI' ) ) {
   7         die( 1 );
   8 }
   9
  10 /**
  11  * The main skin class that provide methods and properties for all other skins.
  12  * This base class is also the "Standard" skin.
  13  *
  14  * See docs/skin.txt for more information.
  15  *
  16  * @ingroup Skins
  17  */
  18 abstract class Skin {
  19         protected $skinname = 'standard';
  20         protected $mRelevantTitle = null;
  21         protected $mRelevantUser = null;
  22
  23         /**
  24          * Fetch the set of available skins.
  25          * @return array of strings
  26          */
  27         static function getSkinNames() {
  28                 global $wgValidSkinNames;
  29                 static $skinsInitialised = false;
  30
  31                 if ( !$skinsInitialised || !count( $wgValidSkinNames ) ) {
  32                         # Get a list of available skins
  33                         # Build using the regular expression '^(.*).php$'
  34                         # Array keys are all lower case, array value keep the case used by filename
  35                         #
  36                         wfProfileIn( __METHOD__ . '-init' );
  37
  38                         global $wgStyleDirectory;
  39
  40                         $skinDir = dir( $wgStyleDirectory );
  41
  42                         # while code from www.php.net
  43                         while ( false !== ( $file = $skinDir->read() ) ) {
  44                                 // Skip non-PHP files, hidden files, and '.dep' includes
  45                                 $matches = array();
  46
  47                                 if ( preg_match( '/^([^.]*)\.php$/', $file, $matches ) ) {
  48                                         $aSkin = $matches[1];
  49                                         $wgValidSkinNames[strtolower( $aSkin )] = $aSkin;
  50                                 }
  51                         }
  52                         $skinDir->close();
  53                         $skinsInitialised = true;
  54                         wfProfileOut( __METHOD__ . '-init' );
  55                 }
  56                 return $wgValidSkinNames;
  57         }
  58
  59         /**
  60          * Fetch the list of usable skins in regards to $wgSkipSkins.
  61          * Useful for Special:Preferences and other places where you
  62          * only want to show skins users _can_ use.
  63          * @return array of strings
  64          */
  65         public static function getUsableSkins() {
  66                 global $wgSkipSkins;
  67
  68                 $usableSkins = self::getSkinNames();
  69
  70                 foreach ( $wgSkipSkins as $skip ) {
  71                         unset( $usableSkins[$skip] );
  72                 }
  73
  74                 return $usableSkins;
  75         }
  76
  77         /**
  78          * Normalize a skin preference value to a form that can be loaded.
  79          * If a skin can't be found, it will fall back to the configured
  80          * default (or the old 'Classic' skin if that's broken).
  81          * @param $key String: 'monobook', 'standard', etc.
  82          * @return string
  83          */
  84         static function normalizeKey( $key ) {
  85                 global $wgDefaultSkin;
  86
  87                 $skinNames = Skin::getSkinNames();
  88
  89                 if ( $key == '' ) {
  90                         // Don't return the default immediately;
  91                         // in a misconfiguration we need to fall back.
  92                         $key = $wgDefaultSkin;
  93                 }
  94
  95                 if ( isset( $skinNames[$key] ) ) {
  96                         return $key;
  97                 }
  98
  99                 // Older versions of the software used a numeric setting
 100                 // in the user preferences.
 101                 $fallback = array(
 102                         0 => $wgDefaultSkin,
 103                         1 => 'nostalgia',
 104                         2 => 'cologneblue'
 105                 );
 106
 107                 if ( isset( $fallback[$key] ) ) {
 108                         $key = $fallback[$key];
 109                 }
 110
 111                 if ( isset( $skinNames[$key] ) ) {
 112                         return $key;
 113                 } else if ( isset( $skinNames[$wgDefaultSkin] ) ) {
 114                         return $wgDefaultSkin;
 115                 } else {
 116                         return 'vector';
 117                 }
 118         }
 119
 120         /**
 121          * Factory method for loading a skin of a given type
 122          * @param $key String: 'monobook', 'standard', etc.
 123          * @return Skin
 124          */
 125         static function &newFromKey( $key ) {
 126                 global $wgStyleDirectory;
 127
 128                 $key = Skin::normalizeKey( $key );
 129
 130                 $skinNames = Skin::getSkinNames();
 131                 $skinName = $skinNames[$key];
 132                 $className = "Skin{$skinName}";
 133
 134                 # Grab the skin class and initialise it.
 135                 if ( !MWInit::classExists( $className ) ) {
 136
 137                         if ( !defined( 'MW_COMPILED' ) ) {
 138                                 // Preload base classes to work around APC/PHP5 bug
 139                                 $deps = "{$wgStyleDirectory}/{$skinName}.deps.php";
 140                                 if ( file_exists( $deps ) ) {
 141                                         include_once( $deps );
 142                                 }
 143                                 require_once( "{$wgStyleDirectory}/{$skinName}.php" );
 144                         }
 145
 146                         # Check if we got if not failback to default skin
 147                         if ( !MWInit::classExists( $className ) ) {
 148                                 # DO NOT die if the class isn't found. This breaks maintenance
 149                                 # scripts and can cause a user account to be unrecoverable
 150                                 # except by SQL manipulation if a previously valid skin name
 151                                 # is no longer valid.
 152                                 wfDebug( "Skin class does not exist: $className\n" );
 153                                 $className = 'SkinVector';
 154                                 if ( !defined( 'MW_COMPILED' ) ) {
 155                                         require_once( "{$wgStyleDirectory}/Vector.php" );
 156                                 }
 157                         }
 158                 }
 159                 $skin = new $className;
 160                 return $skin;
 161         }
 162
 163         /** @return string path to the skin stylesheet */
 164         function getStylesheet() {
 165                 return 'common/wikistandard.css';
 166         }
 167
 168         /** @return string skin name */
 169         public function getSkinName() {
 170                 return $this->skinname;
 171         }
 172
 173         function initPage( OutputPage $out ) {
 174                 wfProfileIn( __METHOD__ );
 175
 176                 $this->preloadExistence();
 177                 $this->setMembers();
 178
 179                 wfProfileOut( __METHOD__ );
 180         }
 181
 182         /**
 183          * Preload the existence of three commonly-requested pages in a single query
 184          */
 185         function preloadExistence() {
 186                 $user = $this->getContext()->getUser();
 187
 188                 // User/talk link
 189                 $titles = array( $user->getUserPage(), $user->getTalkPage() );
 190
 191                 // Other tab link
 192                 if ( $this->getTitle()->getNamespace() == NS_SPECIAL ) {
 193                         // nothing
 194                 } elseif ( $this->getTitle()->isTalkPage() ) {
 195                         $titles[] = $this->getTitle()->getSubjectPage();
 196                 } else {
 197                         $titles[] = $this->getTitle()->getTalkPage();
 198                 }
 199
 200                 $lb = new LinkBatch( $titles );
 201                 $lb->setCaller( __METHOD__ );
 202                 $lb->execute();
 203         }
 204
 205         /**
 206          * Set some local variables
 207          */
 208         protected function setMembers() {
 209                 $this->userpage = $this->getContext()->getUser()->getUserPage()->getPrefixedText();
 210         }
 211
 212         /**
 213          * Set the RequestContext used in this instance
 214          *
 215          * @param RequestContext $context
 216          */
 217         public function setContext( RequestContext $context ) {
 218                 $this->mContext = $context;
 219         }
 220
 221         /**
 222          * Get the RequestContext used in this instance
 223          *
 224          * @return RequestContext
 225          */
 226         public function getContext() {
 227                 if ( !isset($this->mContext) ) {
 228                         wfDebug( __METHOD__ . " called and \$mContext is null. Using RequestContext::getMain(); for sanity\n" );
 229                         $this->mContext = RequestContext::getMain();
 230                 }
 231                 return $this->mContext;
 232         }
 233
 234         /** Get the title
 235          *
 236          * @return Title
 237          */
 238         public function getTitle() {
 239                 return $this->getContext()->getTitle();
 240         }
 241
 242         /** Get the user
 243          *
 244          * @return User
 245          */
 246         public function getUser() {
 247                 return $this->getContext()->getUser();
 248         }
 249
 250         /**
 251          * Get the current revision ID
 252          *
 253          * @return Integer
 254          */
 255         public function getRevisionId() {
 256                 return $this->getContext()->getOutput()->getRevisionId();
 257         }
 258
 259         /**
 260          * Whether the revision displayed is the latest revision of the page
 261          *
 262          * @return Boolean
 263          */
 264         public function isRevisionCurrent() {
 265                 $revID = $this->getRevisionId();
 266                 return $revID == 0 || $revID == $this->getTitle()->getLatestRevID();
 267         }
 268
 269         /**
 270          * Set the "relevant" title
 271          * @see self::getRelevantTitle()
 272          * @param $t Title object to use
 273          */
 274         public function setRelevantTitle( $t ) {
 275                 $this->mRelevantTitle = $t;
 276         }
 277
 278         /**
 279          * Return the "relevant" title.
 280          * A "relevant" title is not necessarily the actual title of the page.
 281          * Special pages like Special:MovePage use set the page they are acting on
 282          * as their "relevant" title, this allows the skin system to display things
 283          * such as content tabs which belong to to that page instead of displaying
 284          * a basic special page tab which has almost no meaning.
 285          */
 286         public function getRelevantTitle() {
 287                 if ( isset($this->mRelevantTitle) ) {
 288                         return $this->mRelevantTitle;
 289                 }
 290                 return $this->getTitle();
 291         }
 292
 293         /**
 294          * Set the "relevant" user
 295          * @see self::getRelevantUser()
 296          * @param $u User object to use
 297          */
 298         public function setRelevantUser( $u ) {
 299                 $this->mRelevantUser = $u;
 300         }
 301
 302         /**
 303          * Return the "relevant" user.
 304          * A "relevant" user is similar to a relevant title. Special pages like
 305          * Special:Contributions mark the user which they are relevant to so that
 306          * things like the toolbox can display the information they usually are only
 307          * able to display on a user's userpage and talkpage.
 308          * @return User
 309          */
 310         public function getRelevantUser() {
 311                 if ( isset($this->mRelevantUser) ) {
 312                         return $this->mRelevantUser;
 313                 }
 314                 $title = $this->getRelevantTitle();
 315                 if( $title->getNamespace() == NS_USER || $title->getNamespace() == NS_USER_TALK ) {
 316                         $rootUser = strtok( $title->getText(), '/' );
 317                         if ( User::isIP( $rootUser ) ) {
 318                                 $this->mRelevantUser = User::newFromName( $rootUser, false );
 319                         } else {
 320                                 $user = User::newFromName( $rootUser );
 321                                 if ( $user->isLoggedIn() ) {
 322                                         $this->mRelevantUser = $user;
 323                                 }
 324                         }
 325                         return $this->mRelevantUser;
 326                 }
 327                 return null;
 328         }
 329
 330         /**
 331          * Outputs the HTML generated by other functions.
 332          * @param $out Object: instance of OutputPage
 333          */
 334         abstract function outputPage( OutputPage $out );
 335
 336         static function makeVariablesScript( $data ) {
 337                 if ( $data ) {
 338                         return Html::inlineScript(
 339                                 ResourceLoader::makeLoaderConditionalScript( ResourceLoader::makeConfigSetScript( $data ) )
 340                         );
 341                 } else {
 342                         return '';
 343                 }
 344         }
 345
 346         /**
 347          * To make it harder for someone to slip a user a fake
 348          * user-JavaScript or user-CSS preview, a random token
 349          * is associated with the login session. If it's not
 350          * passed back with the preview request, we won't render
 351          * the code.
 352          *
 353          * @param $action String: 'edit', 'submit' etc.
 354          * @return bool
 355          */
 356         public function userCanPreview( $action ) {
 357                 if ( $action != 'submit' ) {
 358                         return false;
 359                 }
 360                 if ( !$this->getContext()->getRequest()->wasPosted() ) {
 361                         return false;
 362                 }
 363                 if ( !$this->getTitle()->userCanEditCssSubpage() ) {
 364                         return false;
 365                 }
 366                 if ( !$this->getTitle()->userCanEditJsSubpage() ) {
 367                         return false;
 368                 }
 369
 370                 return $this->getContext()->getUser()->matchEditToken(
 371                         $this->getContext()->getRequest()->getVal( 'wpEditToken' ) );
 372         }
 373
 374         /**
 375          * Generated JavaScript action=raw&gen=js
 376          * This used to load MediaWiki:Common.js and the skin-specific style
 377          * before the ResourceLoader.
 378          *
 379          * @deprecated since 1.18 Use the ResourceLoader instead. This may be removed at some
 380          * point.
 381          * @param $skinName String: If set, overrides the skin name
 382          * @return String
 383          */
 384         public function generateUserJs( $skinName = null ) {
 385                 return '';
 386         }
 387
 388         /**
 389          * Generate user stylesheet for action=raw&gen=css
 390          *
 391          * @deprecated since 1.18 Use the ResourceLoader instead. This may be removed at some
 392          * point.
 393          * @return String
 394          */
 395         public function generateUserStylesheet() {
 396                 return '';
 397         }
 398
 399         /**
 400          * @private
 401          */
 402         function setupUserCss( OutputPage $out ) {
 403                 global $wgUseSiteCss, $wgAllowUserCss, $wgAllowUserCssPrefs;
 404
 405                 wfProfileIn( __METHOD__ );
 406
 407                 $this->setupSkinUserCss( $out );
 408                 // Add any extension CSS
 409                 foreach ( $out->getExtStyle() as $url ) {
 410                         $out->addStyle( $url );
 411                 }
 412
 413                 // Per-site custom styles
 414                 if ( $wgUseSiteCss ) {
 415                         $out->addModuleStyles( array( 'site', 'noscript' ) );
 416                         if( $this->getContext()->getUser()->isLoggedIn() ){
 417                                 $out->addModuleStyles( 'user.groups' );
 418                         }
 419                 }
 420
 421                 // Per-user custom styles
 422                 if ( $wgAllowUserCss ) {
 423                         if ( $this->getTitle()->isCssSubpage() && $this->userCanPreview( $this->getContext()->getRequest()->getVal( 'action' ) ) ) {
 424                                 // @FIXME: properly escape the cdata!
 425                                 $out->addInlineStyle( $this->getContext()->getRequest()->getText( 'wpTextbox1' ) );
 426                         } else {
 427                                 $out->addModuleStyles( 'user' );
 428                         }
 429                 }
 430
 431                 // Per-user preference styles
 432                 if ( $wgAllowUserCssPrefs ) {
 433                         $out->addModuleStyles( 'user.options' );
 434                 }
 435
 436                 wfProfileOut( __METHOD__ );
 437         }
 438
 439         /**
 440          * Get the query to generate a dynamic stylesheet
 441          *
 442          * @return array
 443          */
 444         public static function getDynamicStylesheetQuery() {
 445                 global $wgSquidMaxage;
 446
 447                 return array(
 448                                 'action' => 'raw',
 449                                 'maxage' => $wgSquidMaxage,
 450                                 'usemsgcache' => 'yes',
 451                                 'ctype' => 'text/css',
 452                                 'smaxage' => $wgSquidMaxage,
 453                         );
 454         }
 455
 456         /**
 457          * Add skin specific stylesheets
 458          * Calling this method with an $out of anything but the same OutputPage
 459          * inside ->getContext()->getOutput() is deprecated. The $out arg is kept
 460          * for compatibility purposes with skins.
 461          * @param $out OutputPage
 462          * @delete
 463          */
 464         abstract function setupSkinUserCss( OutputPage $out );
 465
 466         /**
 467          * TODO: document
 468          * @param $title Title
 469          * @return String
 470          */
 471         function getPageClasses( $title ) {
 472                 $numeric = 'ns-' . $title->getNamespace();
 473
 474                 if ( $title->getNamespace() == NS_SPECIAL ) {
 475                         $type = 'ns-special';
 476                         // bug 23315: provide a class based on the canonical special page name without subpages
 477                         list( $canonicalName ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );
 478                         if ( $canonicalName ) {
 479                                 $type .= ' ' . Sanitizer::escapeClass( "mw-special-$canonicalName" );
 480                         } else {
 481                                 $type .= ' mw-invalidspecialpage';
 482                         }
 483                 } elseif ( $title->isTalkPage() ) {
 484                         $type = 'ns-talk';
 485                 } else {
 486                         $type = 'ns-subject';
 487                 }
 488
 489                 $name = Sanitizer::escapeClass( 'page-' . $title->getPrefixedText() );
 490
 491                 return "$numeric $type $name";
 492         }
 493
 494         /**
 495          * This will be called by OutputPage::headElement when it is creating the
 496          * <body> tag, skins can override it if they have a need to add in any
 497          * body attributes or classes of their own.
 498          */
 499         function addToBodyAttributes( $out, &$bodyAttrs ) {
 500                 // does nothing by default
 501         }
 502
 503         /**
 504          * URL to the logo
 505          */
 506         function getLogo() {
 507                 global $wgLogo;
 508                 return $wgLogo;
 509         }
 510
 511         function getCategoryLinks() {
 512                 global $wgUseCategoryBrowser, $wgContLang;
 513
 514                 $out = $this->getContext()->output;
 515
 516                 if ( count( $out->mCategoryLinks ) == 0 ) {
 517                         return '';
 518                 }
 519
 520                 # Separator
 521                 $sep = wfMsgExt( 'catseparator', array( 'parsemag', 'escapenoentities' ) );
 522
 523                 // Use Unicode bidi embedding override characters,
 524                 // to make sure links don't smash each other up in ugly ways.
 525                 $dir = $wgContLang->getDir();
 526                 $embed = "<span dir='$dir'>";
 527                 $pop = '</span>';
 528
 529                 $allCats = $out->getCategoryLinks();
 530                 $s = '';
 531                 $colon = wfMsgExt( 'colon-separator', 'escapenoentities' );
 532
 533                 if ( !empty( $allCats['normal'] ) ) {
 534                         $t = $embed . implode( "{$pop} {$sep} {$embed}" , $allCats['normal'] ) . $pop;
 535
 536                         $msg = wfMsgExt( 'pagecategories', array( 'parsemag', 'escapenoentities' ), count( $allCats['normal'] ) );
 537                         $s .= '<div id="mw-normal-catlinks">' .
 538                                 Linker::link( Title::newFromText( wfMsgForContent( 'pagecategorieslink' ) ), $msg )
 539                                 . $colon . $t . '</div>';
 540                 }
 541
 542                 # Hidden categories
 543                 if ( isset( $allCats['hidden'] ) ) {
 544                         if ( $this->getContext()->getUser()->getBoolOption( 'showhiddencats' ) ) {
 545                                 $class = 'mw-hidden-cats-user-shown';
 546                         } elseif ( $this->getTitle()->getNamespace() == NS_CATEGORY ) {
 547                                 $class = 'mw-hidden-cats-ns-shown';
 548                         } else {
 549                                 $class = 'mw-hidden-cats-hidden';
 550                         }
 551
 552                         $s .= "<div id=\"mw-hidden-catlinks\" class=\"$class\">" .
 553                                 wfMsgExt( 'hidden-categories', array( 'parsemag', 'escapenoentities' ), count( $allCats['hidden'] ) ) .
 554                                 $colon . $embed . implode( "$pop $sep $embed", $allCats['hidden'] ) . $pop .
 555                                 '</div>';
 556                 }
 557
 558                 # optional 'dmoz-like' category browser. Will be shown under the list
 559                 # of categories an article belong to
 560                 if ( $wgUseCategoryBrowser ) {
 561                         $s .= '<br /><hr />';
 562
 563                         # get a big array of the parents tree
 564                         $parenttree = $this->getTitle()->getParentCategoryTree();
 565                         # Skin object passed by reference cause it can not be
 566                         # accessed under the method subfunction drawCategoryBrowser
 567                         $tempout = explode( "\n", $this->drawCategoryBrowser( $parenttree, $this ) );
 568                         # Clean out bogus first entry and sort them
 569                         unset( $tempout[0] );
 570                         asort( $tempout );
 571                         # Output one per line
 572                         $s .= implode( "<br />\n", $tempout );
 573                 }
 574
 575                 return $s;
 576         }
 577
 578         /**
 579          * Render the array as a serie of links.
 580          * @param $tree Array: categories tree returned by Title::getParentCategoryTree
 581          * @return String separated by &gt;, terminate with "\n"
 582          */
 583         function drawCategoryBrowser( $tree ) {
 584                 $return = '';
 585
 586                 foreach ( $tree as $element => $parent ) {
 587                         if ( empty( $parent ) ) {
 588                                 # element start a new list
 589                                 $return .= "\n";
 590                         } else {
 591                                 # grab the others elements
 592                                 $return .= $this->drawCategoryBrowser( $parent ) . ' &gt; ';
 593                         }
 594
 595                         # add our current element to the list
 596                         $eltitle = Title::newFromText( $element );
 597                         $return .=  Linker::link( $eltitle, $eltitle->getText() );
 598                 }
 599
 600                 return $return;
 601         }
 602
 603         function getCategories() {
 604                 $out = $this->getContext()->output;
 605
 606                 $catlinks = $this->getCategoryLinks();
 607
 608                 $classes = 'catlinks';
 609
 610                 // Check what we're showing
 611                 $allCats = $out->getCategoryLinks();
 612                 $showHidden = $this->getContext()->getUser()->getBoolOption( 'showhiddencats' ) ||
 613                                                 $this->getTitle()->getNamespace() == NS_CATEGORY;
 614
 615                 if ( empty( $allCats['normal'] ) && !( !empty( $allCats['hidden'] ) && $showHidden ) ) {
 616                         $classes .= ' catlinks-allhidden';
 617                 }
 618
 619                 return "<div id='catlinks' class='$classes'>{$catlinks}</div>";
 620         }
 621
 622         /**
 623          * This runs a hook to allow extensions placing their stuff after content
 624          * and article metadata (e.g. categories).
 625          * Note: This function has nothing to do with afterContent().
 626          *
 627          * This hook is placed here in order to allow using the same hook for all
 628          * skins, both the SkinTemplate based ones and the older ones, which directly
 629          * use this class to get their data.
 630          *
 631          * The output of this function gets processed in SkinTemplate::outputPage() for
 632          * the SkinTemplate based skins, all other skins should directly echo it.
 633          *
 634          * Returns an empty string by default, if not changed by any hook function.
 635          */
 636         protected function afterContentHook() {
 637                 $data = '';
 638
 639                 if ( wfRunHooks( 'SkinAfterContent', array( &$data, $this ) ) ) {
 640                         // adding just some spaces shouldn't toggle the output
 641                         // of the whole <div/>, so we use trim() here
 642                         if ( trim( $data ) != '' ) {
 643                                 // Doing this here instead of in the skins to
 644                                 // ensure that the div has the same ID in all
 645                                 // skins
 646                                 $data = "<div id='mw-data-after-content'>\n" .
 647                                         "\t$data\n" .
 648                                         "</div>\n";
 649                         }
 650                 } else {
 651                         wfDebug( "Hook SkinAfterContent changed output processing.\n" );
 652                 }
 653
 654                 return $data;
 655         }
 656
 657         /**
 658          * Generate debug data HTML for displaying at the bottom of the main content
 659          * area.
 660          * @return String HTML containing debug data, if enabled (otherwise empty).
 661          */
 662         protected function generateDebugHTML() {
 663                 global $wgShowDebug;
 664
 665                 if ( $wgShowDebug ) {
 666                         $listInternals = $this->formatDebugHTML( $this->getContext()->getOutput()->mDebugtext );
 667                         return "\n<hr />\n<strong>Debug data:</strong><ul id=\"mw-debug-html\">" .
 668                                 $listInternals . "</ul>\n";
 669                 }
 670
 671                 return '';
 672         }
 673
 674         private function formatDebugHTML( $debugText ) {
 675                 global $wgDebugTimestamps;
 676
 677                 $lines = explode( "\n", $debugText );
 678                 $curIdent = 0;
 679                 $ret = '<li>';
 680
 681                 foreach ( $lines as $line ) {
 682                         $pre = '';
 683                         if ( $wgDebugTimestamps ) {
 684                                 $matches = array();
 685                                 if ( preg_match( '/^(\d+\.\d+\s{2})/', $line, $matches ) ) {
 686                                         $pre = $matches[1];
 687                                         $line = substr( $line, strlen( $pre ) );
 688                                 }
 689                         }
 690                         $display = ltrim( $line );
 691                         $ident = strlen( $line ) - strlen( $display );
 692                         $diff = $ident - $curIdent;
 693
 694                         $display = $pre . $display;
 695                         if ( $display == '' ) {
 696                                 $display = "\xc2\xa0";
 697                         }
 698
 699                         if ( !$ident && $diff < 0 && substr( $display, 0, 9 ) != 'Entering ' && substr( $display, 0, 8 ) != 'Exiting ' ) {
 700                                 $ident = $curIdent;
 701                                 $diff = 0;
 702                                 $display = '<span style="background:yellow;">' . htmlspecialchars( $display ) . '</span>';
 703                         } else {
 704                                 $display = htmlspecialchars( $display );
 705                         }
 706
 707                         if ( $diff < 0 ) {
 708                                 $ret .= str_repeat( "</li></ul>\n", -$diff ) . "</li><li>\n";
 709                         } elseif ( $diff == 0 ) {
 710                                 $ret .= "</li><li>\n";
 711                         } else {
 712                                 $ret .= str_repeat( "<ul><li>\n", $diff );
 713                         }
 714                         $ret .= "<tt>$display</tt>\n";
 715
 716                         $curIdent = $ident;
 717                 }
 718
 719                 $ret .= str_repeat( '</li></ul>', $curIdent ) . '</li>';
 720
 721                 return $ret;
 722         }
 723
 724         /**
 725          * This gets called shortly before the </body> tag.
 726          * @param $out OutputPage object
 727          * @return String HTML-wrapped JS code to be put before </body>
 728          */
 729         function bottomScripts( $out ) {
 730                 // TODO and the suckage continues. This function is really just a wrapper around
 731                 // OutputPage::getBottomScripts() which takes a Skin param. This should be cleaned
 732                 // up at some point
 733                 $bottomScriptText = $out->getBottomScripts( $this );
 734                 wfRunHooks( 'SkinAfterBottomScripts', array( $this, &$bottomScriptText ) );
 735
 736                 return $bottomScriptText;
 737         }
 738
 739         /** @return string Retrievied from HTML text */
 740         function printSource() {
 741                 $url = htmlspecialchars( $this->getTitle()->getFullURL() );
 742                 return wfMsg( 'retrievedfrom', '<a href="' . $url . '">' . $url . '</a>' );
 743         }
 744
 745         function getUndeleteLink() {
 746                 $action = $this->getContext()->getRequest()->getVal( 'action', 'view' );
 747
 748                 if ( $this->getContext()->getUser()->isAllowed( 'deletedhistory' ) &&
 749                         ( $this->getTitle()->getArticleId() == 0 || $action == 'history' ) ) {
 750                         $n = $this->getTitle()->isDeleted();
 751
 752                         if ( $n ) {
 753                                 if ( $this->getContext()->getUser()->isAllowed( 'undelete' ) ) {
 754                                         $msg = 'thisisdeleted';
 755                                 } else {
 756                                         $msg = 'viewdeleted';
 757                                 }
 758
 759                                 return wfMsg(
 760                                         $msg,
 761                                         Linker::link(
 762                                                 SpecialPage::getTitleFor( 'Undelete', $this->getTitle()->getPrefixedDBkey() ),
 763                                                 wfMsgExt( 'restorelink', array( 'parsemag', 'escape' ), $this->getContext()->getLang()->formatNum( $n ) ),
 764                                                 array(),
 765                                                 array(),
 766                                                 array( 'known', 'noclasses' )
 767                                         )
 768                                 );
 769                         }
 770                 }
 771
 772                 return '';
 773         }
 774
 775         function subPageSubtitle() {
 776                 $out = $this->getContext()->getOutput();
 777                 $subpages = '';
 778
 779                 if ( !wfRunHooks( 'SkinSubPageSubtitle', array( &$subpages, $this, $out ) ) ) {
 780                         return $subpages;
 781                 }
 782
 783                 if ( $out->isArticle() && MWNamespace::hasSubpages( $out->getTitle()->getNamespace() ) ) {
 784                         $ptext = $this->getTitle()->getPrefixedText();
 785                         if ( preg_match( '/\//', $ptext ) ) {
 786                                 $links = explode( '/', $ptext );
 787                                 array_pop( $links );
 788                                 $c = 0;
 789                                 $growinglink = '';
 790                                 $display = '';
 791
 792                                 foreach ( $links as $link ) {
 793                                         $growinglink .= $link;
 794                                         $display .= $link;
 795                                         $linkObj = Title::newFromText( $growinglink );
 796
 797                                         if ( is_object( $linkObj ) && $linkObj->exists() ) {
 798                                                 $getlink = $this->link(
 799                                                         $linkObj,
 800                                                         htmlspecialchars( $display ),
 801                                                         array(),
 802                                                         array(),
 803                                                         array( 'known', 'noclasses' )
 804                                                 );
 805
 806                                                 $c++;
 807
 808                                                 if ( $c > 1 ) {
 809                                                         $subpages .= wfMsgExt( 'pipe-separator', 'escapenoentities' );
 810                                                 } else  {
 811                                                         $subpages .= '&lt; ';
 812                                                 }
 813
 814                                                 $subpages .= $getlink;
 815                                                 $display = '';
 816                                         } else {
 817                                                 $display .= '/';
 818                                         }
 819                                         $growinglink .= '/';
 820                                 }
 821                         }
 822                 }
 823
 824                 return $subpages;
 825         }
 826
 827         /**
 828          * Returns true if the IP should be shown in the header
 829          */
 830         function showIPinHeader() {
 831                 global $wgShowIPinHeader;
 832                 return $wgShowIPinHeader && session_id() != '';
 833         }
 834
 835         function getSearchLink() {
 836                 $searchPage = SpecialPage::getTitleFor( 'Search' );
 837                 return $searchPage->getLocalURL();
 838         }
 839
 840         function escapeSearchLink() {
 841                 return htmlspecialchars( $this->getSearchLink() );
 842         }
 843
 844         function getCopyright( $type = 'detect' ) {
 845                 global $wgRightsPage, $wgRightsUrl, $wgRightsText;
 846
 847                 if ( $type == 'detect' ) {
 848                         $diff = $this->getContext()->getRequest()->getVal( 'diff' );
 849
 850                         if ( is_null( $diff ) && !$this->isRevisionCurrent() && wfMsgForContent( 'history_copyright' ) !== '-' ) {
 851                                 $type = 'history';
 852                         } else {
 853                                 $type = 'normal';
 854                         }
 855                 }
 856
 857                 if ( $type == 'history' ) {
 858                         $msg = 'history_copyright';
 859                 } else {
 860                         $msg = 'copyright';
 861                 }
 862
 863                 $out = '';
 864
 865                 if ( $wgRightsPage ) {
 866                         $title = Title::newFromText( $wgRightsPage );
 867                         $link = Linker::linkKnown( $title, $wgRightsText );
 868                 } elseif ( $wgRightsUrl ) {
 869                         $link = Linker::makeExternalLink( $wgRightsUrl, $wgRightsText );
 870                 } elseif ( $wgRightsText ) {
 871                         $link = $wgRightsText;
 872                 } else {
 873                         # Give up now
 874                         return $out;
 875                 }
 876
 877                 // Allow for site and per-namespace customization of copyright notice.
 878                 $forContent = true;
 879
 880                 wfRunHooks( 'SkinCopyrightFooter', array( $this->getTitle(), $type, &$msg, &$link, &$forContent ) );
 881
 882                 if ( $forContent ) {
 883                         $out .= wfMsgForContent( $msg, $link );
 884                 } else {
 885                         $out .= wfMsg( $msg, $link );
 886                 }
 887
 888                 return $out;
 889         }
 890
 891         function getCopyrightIcon() {
 892                 global $wgRightsUrl, $wgRightsText, $wgRightsIcon, $wgCopyrightIcon;
 893
 894                 $out = '';
 895
 896                 if ( isset( $wgCopyrightIcon ) && $wgCopyrightIcon ) {
 897                         $out = $wgCopyrightIcon;
 898                 } elseif ( $wgRightsIcon ) {
 899                         $icon = htmlspecialchars( $wgRightsIcon );
 900
 901                         if ( $wgRightsUrl ) {
 902                                 $url = htmlspecialchars( $wgRightsUrl );
 903                                 $out .= '<a href="' . $url . '">';
 904                         }
 905
 906                         $text = htmlspecialchars( $wgRightsText );
 907                         $out .= "<img src=\"$icon\" alt=\"$text\" width=\"88\" height=\"31\" />";
 908
 909                         if ( $wgRightsUrl ) {
 910                                 $out .= '</a>';
 911                         }
 912                 }
 913
 914                 return $out;
 915         }
 916
 917         /**
 918          * Gets the powered by MediaWiki icon.
 919          * @return string
 920          */
 921         function getPoweredBy() {
 922                 global $wgStylePath;
 923
 924                 $url = htmlspecialchars( "$wgStylePath/common/images/poweredby_mediawiki_88x31.png" );
 925                 $text = '<a href="http://www.mediawiki.org/"><img src="' . $url . '" height="31" width="88" alt="Powered by MediaWiki" /></a>';
 926                 wfRunHooks( 'SkinGetPoweredBy', array( &$text, $this ) );
 927                 return $text;
 928         }
 929
 930         /**
 931          * Get the timestamp of the latest revision, formatted in user language
 932          *
 933          * @param $article Article object. Used if we're working with the current revision
 934          * @return String
 935          */
 936         protected function lastModified( $article ) {
 937                 if ( !$this->isRevisionCurrent() ) {
 938                         $timestamp = Revision::getTimestampFromId( $this->getTitle(), $this->getRevisionId() );
 939                 } else {
 940                         $timestamp = $article->getTimestamp();
 941                 }
 942
 943                 if ( $timestamp ) {
 944                         $d = $this->getContext()->getLang()->date( $timestamp, true );
 945                         $t = $this->getContext()->getLang()->time( $timestamp, true );
 946                         $s = ' ' . wfMsg( 'lastmodifiedat', $d, $t );
 947                 } else {
 948                         $s = '';
 949                 }
 950
 951                 if ( wfGetLB()->getLaggedSlaveMode() ) {
 952                         $s .= ' <strong>' . wfMsg( 'laggedslavemode' ) . '</strong>';
 953                 }
 954
 955                 return $s;
 956         }
 957
 958         function logoText( $align = '' ) {
 959                 if ( $align != '' ) {
 960                         $a = " align='{$align}'";
 961                 } else {
 962                         $a = '';
 963                 }
 964
 965                 $mp = wfMsg( 'mainpage' );
 966                 $mptitle = Title::newMainPage();
 967                 $url = ( is_object( $mptitle ) ? $mptitle->escapeLocalURL() : '' );
 968
 969                 $logourl = $this->getLogo();
 970                 $s = "<a href='{$url}'><img{$a} src='{$logourl}' alt='[{$mp}]' /></a>";
 971
 972                 return $s;
 973         }
 974
 975         /**
 976          * Renders a $wgFooterIcons icon acording to the method's arguments
 977          * @param $icon Array: The icon to build the html for, see $wgFooterIcons for the format of this array
 978          * @param $withImage Boolean: Whether to use the icon's image or output a text-only footericon
 979          */
 980         function makeFooterIcon( $icon, $withImage = 'withImage' ) {
 981                 if ( is_string( $icon ) ) {
 982                         $html = $icon;
 983                 } else { // Assuming array
 984                         $url = isset($icon["url"]) ? $icon["url"] : null;
 985                         unset( $icon["url"] );
 986                         if ( isset( $icon["src"] ) && $withImage === 'withImage' ) {
 987                                 $html = Html::element( 'img', $icon ); // do this the lazy way, just pass icon data as an attribute array
 988                         } else {
 989                                 $html = htmlspecialchars( $icon["alt"] );
 990                         }
 991                         if ( $url ) {
 992                                 $html = Html::rawElement( 'a', array( "href" => $url ), $html );
 993                         }
 994                 }
 995                 return $html;
 996         }
 997
 998         /**
 999          * Gets the link to the wiki's main page.
1000          * @return string
1001          */
1002         function mainPageLink() {
1003                 $s = Linker::link(
1004                         Title::newMainPage(),
1005                         wfMsg( 'mainpage' ),
1006                         array(),
1007                         array(),
1008                         array( 'known', 'noclasses' )
1009                 );
1010
1011                 return $s;
1012         }
1013
1014         public function footerLink( $desc, $page ) {
1015                 // if the link description has been set to "-" in the default language,
1016                 if ( wfMsgForContent( $desc )  == '-' ) {
1017                         // then it is disabled, for all languages.
1018                         return '';
1019                 } else {
1020                         // Otherwise, we display the link for the user, described in their
1021                         // language (which may or may not be the same as the default language),
1022                         // but we make the link target be the one site-wide page.
1023                         $title = Title::newFromText( wfMsgForContent( $page ) );
1024
1025                         return Linker::linkKnown(
1026                                 $title,
1027                                 wfMsgExt( $desc, array( 'parsemag', 'escapenoentities' ) )
1028                         );
1029                 }
1030         }
1031
1032         /**
1033          * Gets the link to the wiki's privacy policy page.
1034          */
1035         function privacyLink() {
1036                 return $this->footerLink( 'privacy', 'privacypage' );
1037         }
1038
1039         /**
1040          * Gets the link to the wiki's about page.
1041          */
1042         function aboutLink() {
1043                 return $this->footerLink( 'aboutsite', 'aboutpage' );
1044         }
1045
1046         /**
1047          * Gets the link to the wiki's general disclaimers page.
1048          */
1049         function disclaimerLink() {
1050                 return $this->footerLink( 'disclaimers', 'disclaimerpage' );
1051         }
1052
1053         /**
1054          * Return URL options for the 'edit page' link.
1055          * This may include an 'oldid' specifier, if the current page view is such.
1056          *
1057          * @return array
1058          * @private
1059          */
1060         function editUrlOptions() {
1061                 $options = array( 'action' => 'edit' );
1062
1063                 if ( !$this->isRevisionCurrent() ) {
1064                         $options['oldid'] = intval( $this->getRevisionId() );
1065                 }
1066
1067                 return $options;
1068         }
1069
1070         function showEmailUser( $id ) {
1071                 $targetUser = User::newFromId( $id );
1072                 return $this->getContext()->getUser()->canSendEmail() && # the sending user must have a confirmed email address
1073                         $targetUser->canReceiveEmail(); # the target user must have a confirmed email address and allow emails from users
1074         }
1075
1076         /**
1077          * Return a fully resolved style path url to images or styles stored in the common folder.
1078          * This method returns a url resolved using the configured skin style path
1079          * and includes the style version inside of the url.
1080          * @param $name String: The name or path of a skin resource file
1081          * @return String The fully resolved style path url including styleversion
1082          */
1083         function getCommonStylePath( $name ) {
1084                 global $wgStylePath, $wgStyleVersion;
1085                 return "$wgStylePath/common/$name?$wgStyleVersion";
1086         }
1087
1088         /**
1089          * Return a fully resolved style path url to images or styles stored in the curent skins's folder.
1090          * This method returns a url resolved using the configured skin style path
1091          * and includes the style version inside of the url.
1092          * @param $name String: The name or path of a skin resource file
1093          * @return String The fully resolved style path url including styleversion
1094          */
1095         function getSkinStylePath( $name ) {
1096                 global $wgStylePath, $wgStyleVersion;
1097                 return "$wgStylePath/{$this->stylename}/$name?$wgStyleVersion";
1098         }
1099
1100         /* these are used extensively in SkinTemplate, but also some other places */
1101         static function makeMainPageUrl( $urlaction = '' ) {
1102                 $title = Title::newMainPage();
1103                 self::checkTitle( $title, '' );
1104
1105                 return $title->getLocalURL( $urlaction );
1106         }
1107
1108         static function makeSpecialUrl( $name, $urlaction = '' ) {
1109                 $title = SpecialPage::getSafeTitleFor( $name );
1110                 return $title->getLocalURL( $urlaction );
1111         }
1112
1113         static function makeSpecialUrlSubpage( $name, $subpage, $urlaction = '' ) {
1114                 $title = SpecialPage::getSafeTitleFor( $name, $subpage );
1115                 return $title->getLocalURL( $urlaction );
1116         }
1117
1118         static function makeI18nUrl( $name, $urlaction = '' ) {
1119                 $title = Title::newFromText( wfMsgForContent( $name ) );
1120                 self::checkTitle( $title, $name );
1121                 return $title->getLocalURL( $urlaction );
1122         }
1123
1124         static function makeUrl( $name, $urlaction = '' ) {
1125                 $title = Title::newFromText( $name );
1126                 self::checkTitle( $title, $name );
1127
1128                 return $title->getLocalURL( $urlaction );
1129         }
1130
1131         /**
1132          * If url string starts with http, consider as external URL, else
1133          * internal
1134          */
1135         static function makeInternalOrExternalUrl( $name ) {
1136                 if ( preg_match( '/^(?:' . wfUrlProtocols() . ')/', $name ) ) {
1137                         return $name;
1138                 } else {
1139                         return self::makeUrl( $name );
1140                 }
1141         }
1142
1143         # this can be passed the NS number as defined in Language.php
1144         static function makeNSUrl( $name, $urlaction = '', $namespace = NS_MAIN ) {
1145                 $title = Title::makeTitleSafe( $namespace, $name );
1146                 self::checkTitle( $title, $name );
1147
1148                 return $title->getLocalURL( $urlaction );
1149         }
1150
1151         /* these return an array with the 'href' and boolean 'exists' */
1152         static function makeUrlDetails( $name, $urlaction = '' ) {
1153                 $title = Title::newFromText( $name );
1154                 self::checkTitle( $title, $name );
1155
1156                 return array(
1157                         'href' => $title->getLocalURL( $urlaction ),
1158                         'exists' => $title->getArticleID() != 0,
1159                 );
1160         }
1161
1162         /**
1163          * Make URL details where the article exists (or at least it's convenient to think so)
1164          */
1165         static function makeKnownUrlDetails( $name, $urlaction = '' ) {
1166                 $title = Title::newFromText( $name );
1167                 self::checkTitle( $title, $name );
1168
1169                 return array(
1170                         'href' => $title->getLocalURL( $urlaction ),
1171                         'exists' => true
1172                 );
1173         }
1174
1175         # make sure we have some title to operate on
1176         static function checkTitle( &$title, $name ) {
1177                 if ( !is_object( $title ) ) {
1178                         $title = Title::newFromText( $name );
1179                         if ( !is_object( $title ) ) {
1180                                 $title = Title::newFromText( '--error: link target missing--' );
1181                         }
1182                 }
1183         }
1184
1185         /**
1186          * Build an array that represents the sidebar(s), the navigation bar among them
1187          *
1188          * @return array
1189          */
1190         function buildSidebar() {
1191                 global $parserMemc, $wgEnableSidebarCache, $wgSidebarCacheExpiry;
1192                 wfProfileIn( __METHOD__ );
1193
1194                 $key = wfMemcKey( 'sidebar', $this->getContext()->getLang()->getCode() );
1195
1196                 if ( $wgEnableSidebarCache ) {
1197                         $cachedsidebar = $parserMemc->get( $key );
1198                         if ( $cachedsidebar ) {
1199                                 wfProfileOut( __METHOD__ );
1200                                 return $cachedsidebar;
1201                         }
1202                 }
1203
1204                 $bar = array();
1205                 $this->addToSidebar( $bar, 'sidebar' );
1206
1207                 wfRunHooks( 'SkinBuildSidebar', array( $this, &$bar ) );
1208                 if ( $wgEnableSidebarCache ) {
1209                         $parserMemc->set( $key, $bar, $wgSidebarCacheExpiry );
1210                 }
1211
1212                 wfProfileOut( __METHOD__ );
1213                 return $bar;
1214         }
1215         /**
1216          * Add content from a sidebar system message
1217          * Currently only used for MediaWiki:Sidebar (but may be used by Extensions)
1218          *
1219          * This is just a wrapper around addToSidebarPlain() for backwards compatibility
1220          *
1221          * @param &$bar array
1222          * @param $message String
1223          */
1224         function addToSidebar( &$bar, $message ) {
1225                 $this->addToSidebarPlain( $bar, wfMsgForContentNoTrans( $message ) );
1226         }
1227
1228         /**
1229          * Add content from plain text
1230          * @since 1.17
1231          * @param &$bar array
1232          * @param $text string
1233          */
1234         function addToSidebarPlain( &$bar, $text ) {
1235                 $lines = explode( "\n", $text );
1236                 $wikiBar = array(); # We need to handle the wikitext on a different variable, to avoid trying to do an array operation on text, which would be a fatal error.
1237
1238                 $heading = '';
1239
1240                 foreach ( $lines as $line ) {
1241                         if ( strpos( $line, '*' ) !== 0 ) {
1242                                 continue;
1243                         }
1244
1245                         if ( strpos( $line, '**' ) !== 0 ) {
1246                                 $heading = trim( $line, '* ' );
1247                                 if ( !array_key_exists( $heading, $bar ) ) {
1248                                         $bar[$heading] = array();
1249                                 }
1250                         } else {
1251                                 $line = trim( $line, '* ' );
1252
1253                                 if ( strpos( $line, '|' ) !== false ) { // sanity check
1254                                         $line = MessageCache::singleton()->transform( $line, false, null, $this->getTitle() );
1255                                         $line = array_map( 'trim', explode( '|', $line, 2 ) );
1256                                         $link = wfMsgForContent( $line[0] );
1257
1258                                         if ( $link == '-' ) {
1259                                                 continue;
1260                                         }
1261
1262                                         $text = wfMsgExt( $line[1], 'parsemag' );
1263
1264                                         if ( wfEmptyMsg( $line[1] ) ) {
1265                                                 $text = $line[1];
1266                                         }
1267
1268                                         if ( wfEmptyMsg( $line[0] ) ) {
1269                                                 $link = $line[0];
1270                                         }
1271
1272                                         if ( preg_match( '/^(?:' . wfUrlProtocols() . ')/', $link ) ) {
1273                                                 $href = $link;
1274                                         } else {
1275                                                 $title = Title::newFromText( $link );
1276
1277                                                 if ( $title ) {
1278                                                         $title = $title->fixSpecialName();
1279                                                         $href = $title->getLocalURL();
1280                                                 } else {
1281                                                         $href = 'INVALID-TITLE';
1282                                                 }
1283                                         }
1284
1285                                         $bar[$heading][] = array(
1286                                                 'text' => $text,
1287                                                 'href' => $href,
1288                                                 'id' => 'n-' . strtr( $line[1], ' ', '-' ),
1289                                                 'active' => false
1290                                         );
1291                                 } else if ( ( substr( $line, 0, 2 ) == '{{' ) && ( substr( $line, -2 ) == '}}' ) ) {
1292                                         global $wgParser;
1293
1294                                         $line = substr( $line, 2, strlen( $line ) - 4 );
1295
1296                                         $options = new ParserOptions();
1297                                         $options->setEditSection( false );
1298                                         $options->setInterfaceMessage( true );
1299                                         $wikiBar[$heading] = $wgParser->parse( wfMsgForContentNoTrans( $line ) , $this->getTitle(), $options )->getText();
1300                                 } else {
1301                                         continue;
1302                                 }
1303                         }
1304                 }
1305
1306                 if ( count( $wikiBar ) > 0 ) {
1307                         $bar = array_merge( $bar, $wikiBar );
1308                 }
1309
1310                 return $bar;
1311         }
1312
1313         /**
1314          * Should we include common/wikiprintable.css?  Skins that have their own
1315          * print stylesheet should override this and return false.  (This is an
1316          * ugly hack to get Monobook to play nicely with
1317          * OutputPage::headElement().)
1318          *
1319          * @return bool
1320          */
1321         public function commonPrintStylesheet() {
1322                 return true;
1323         }
1324
1325         /**
1326          * Gets new talk page messages for the current user.
1327          * @return MediaWiki message or if no new talk page messages, nothing
1328          */
1329         function getNewtalks() {
1330                 $out = $this->getContext()->getOutput();
1331
1332                 $newtalks = $this->getContext()->getUser()->getNewMessageLinks();
1333                 $ntl = '';
1334
1335                 if ( count( $newtalks ) == 1 && $newtalks[0]['wiki'] === wfWikiID() ) {
1336                         $userTitle = $this->getUser()->getUserPage();
1337                         $userTalkTitle = $userTitle->getTalkPage();
1338
1339                         if ( !$userTalkTitle->equals( $out->getTitle() ) ) {
1340                                 $newMessagesLink = $this->link(
1341                                         $userTalkTitle,
1342                                         wfMsgHtml( 'newmessageslink' ),
1343                                         array(),
1344                                         array( 'redirect' => 'no' ),
1345                                         array( 'known', 'noclasses' )
1346                                 );
1347
1348                                 $newMessagesDiffLink = $this->link(
1349                                         $userTalkTitle,
1350                                         wfMsgHtml( 'newmessagesdifflink' ),
1351                                         array(),
1352                                         array( 'diff' => 'cur' ),
1353                                         array( 'known', 'noclasses' )
1354                                 );
1355
1356                                 $ntl = wfMsg(
1357                                         'youhavenewmessages',
1358                                         $newMessagesLink,
1359                                         $newMessagesDiffLink
1360                                 );
1361                                 # Disable Squid cache
1362                                 $out->setSquidMaxage( 0 );
1363                         }
1364                 } elseif ( count( $newtalks ) ) {
1365                         // _>" " for BC <= 1.16
1366                         $sep = str_replace( '_', ' ', wfMsgHtml( 'newtalkseparator' ) );
1367                         $msgs = array();
1368
1369                         foreach ( $newtalks as $newtalk ) {
1370                                 $msgs[] = Xml::element(
1371                                         'a',
1372                                         array( 'href' => $newtalk['link'] ), $newtalk['wiki']
1373                                 );
1374                         }
1375                         $parts = implode( $sep, $msgs );
1376                         $ntl = wfMsgHtml( 'youhavenewmessagesmulti', $parts );
1377                         $out->setSquidMaxage( 0 );
1378                 }
1379
1380                 return $ntl;
1381         }
1382
1383         /**
1384          * Get a cached notice
1385          *
1386          * @param $name String: message name, or 'default' for $wgSiteNotice
1387          * @return String: HTML fragment
1388          */
1389         private function getCachedNotice( $name ) {
1390                 global $wgRenderHashAppend, $parserMemc;
1391
1392                 wfProfileIn( __METHOD__ );
1393
1394                 $needParse = false;
1395
1396                 if( $name === 'default' ) {
1397                         // special case
1398                         global $wgSiteNotice;
1399                         $notice = $wgSiteNotice;
1400                         if( empty( $notice ) ) {
1401                                 wfProfileOut( __METHOD__ );
1402                                 return false;
1403                         }
1404                 } else {
1405                         $msg = wfMessage( $name )->inContentLanguage();
1406                         if( $msg->isDisabled() ) {
1407                                 wfProfileOut( __METHOD__ );
1408                                 return false;
1409                         }
1410                         $notice = $msg->plain();
1411                 }
1412
1413                 // Use the extra hash appender to let eg SSL variants separately cache.
1414                 $key = wfMemcKey( $name . $wgRenderHashAppend );
1415                 $cachedNotice = $parserMemc->get( $key );
1416                 if( is_array( $cachedNotice ) ) {
1417                         if( md5( $notice ) == $cachedNotice['hash'] ) {
1418                                 $notice = $cachedNotice['html'];
1419                         } else {
1420                                 $needParse = true;
1421                         }
1422                 } else {
1423                         $needParse = true;
1424                 }
1425
1426                 if ( $needParse ) {
1427                         $parsed = $this->getContext()->getOutput()->parse( $notice );
1428                         $parserMemc->set( $key, array( 'html' => $parsed, 'hash' => md5( $notice ) ), 600 );
1429                         $notice = $parsed;
1430                 }
1431
1432                 $notice = '<div id="localNotice">' .$notice . '</div>';
1433                 wfProfileOut( __METHOD__ );
1434                 return $notice;
1435         }
1436
1437         /**
1438          * Get a notice based on page's namespace
1439          *
1440          * @return String: HTML fragment
1441          */
1442         function getNamespaceNotice() {
1443                 wfProfileIn( __METHOD__ );
1444
1445                 $key = 'namespacenotice-' . $this->getTitle()->getNsText();
1446                 $namespaceNotice = $this->getCachedNotice( $key );
1447                 if ( $namespaceNotice && substr( $namespaceNotice, 0, 7 ) != '<p>&lt;' ) {
1448                         $namespaceNotice = '<div id="namespacebanner">' . $namespaceNotice . '</div>';
1449                 } else {
1450                         $namespaceNotice = '';
1451                 }
1452
1453                 wfProfileOut( __METHOD__ );
1454                 return $namespaceNotice;
1455         }
1456
1457         /**
1458          * Get the site notice
1459          *
1460          * @return String: HTML fragment
1461          */
1462         function getSiteNotice() {
1463                 wfProfileIn( __METHOD__ );
1464                 $siteNotice = '';
1465
1466                 if ( wfRunHooks( 'SiteNoticeBefore', array( &$siteNotice, $this ) ) ) {
1467                         if ( is_object( $this->getContext()->getUser() ) && $this->getContext()->getUser()->isLoggedIn() ) {
1468                                 $siteNotice = $this->getCachedNotice( 'sitenotice' );
1469                         } else {
1470                                 $anonNotice = $this->getCachedNotice( 'anonnotice' );
1471                                 if ( !$anonNotice ) {
1472                                         $siteNotice = $this->getCachedNotice( 'sitenotice' );
1473                                 } else {
1474                                         $siteNotice = $anonNotice;
1475                                 }
1476                         }
1477                         if ( !$siteNotice ) {
1478                                 $siteNotice = $this->getCachedNotice( 'default' );
1479                         }
1480                 }
1481
1482                 wfRunHooks( 'SiteNoticeAfter', array( &$siteNotice, $this ) );
1483                 wfProfileOut( __METHOD__ );
1484                 return $siteNotice;
1485         }
1486
1487         /**
1488          * Create a section edit link.  This supersedes editSectionLink() and
1489          * editSectionLinkForOther().
1490          *
1491          * @param $nt      Title  The title being linked to (may not be the same as
1492          *   $wgTitle, if the section is included from a template)
1493          * @param $section string The designation of the section being pointed to,
1494          *   to be included in the link, like "&section=$section"
1495          * @param $tooltip string The tooltip to use for the link: will be escaped
1496          *   and wrapped in the 'editsectionhint' message
1497          * @param $lang    string Language code
1498          * @return         string HTML to use for edit link
1499          */
1500         public function doEditSectionLink( Title $nt, $section, $tooltip = null, $lang = false ) {
1501                 // HTML generated here should probably have userlangattributes
1502                 // added to it for LTR text on RTL pages
1503                 $attribs = array();
1504                 if ( !is_null( $tooltip ) ) {
1505                         # Bug 25462: undo double-escaping.
1506                         $tooltip = Sanitizer::decodeCharReferences( $tooltip );
1507                         $attribs['title'] = wfMsgExt( 'editsectionhint', array( 'language' => $lang, 'parsemag' ), $tooltip );
1508                 }
1509                 $link = Linker::link( $nt, wfMsgExt( 'editsection', array( 'language' => $lang ) ),
1510                         $attribs,
1511                         array( 'action' => 'edit', 'section' => $section ),
1512                         array( 'noclasses', 'known' )
1513                 );
1514
1515                 # Run the old hook.  This takes up half of the function . . . hopefully
1516                 # we can rid of it someday.
1517                 $attribs = '';
1518                 if ( $tooltip ) {
1519                         $attribs = wfMsgExt( 'editsectionhint', array( 'language' => $lang, 'parsemag', 'escape' ), $tooltip );
1520                         $attribs = " title=\"$attribs\"";
1521                 }
1522                 $result = null;
1523                 wfRunHooks( 'EditSectionLink', array( &$this, $nt, $section, $attribs, $link, &$result, $lang ) );
1524                 if ( !is_null( $result ) ) {
1525                         # For reverse compatibility, add the brackets *after* the hook is
1526                         # run, and even add them to hook-provided text.  (This is the main
1527                         # reason that the EditSectionLink hook is deprecated in favor of
1528                         # DoEditSectionLink: it can't change the brackets or the span.)
1529                         $result = wfMsgExt( 'editsection-brackets', array( 'escape', 'replaceafter', 'language' => $lang ), $result );
1530                         return "<span class=\"editsection\">$result</span>";
1531                 }
1532
1533                 # Add the brackets and the span, and *then* run the nice new hook, with
1534                 # clean and non-redundant arguments.
1535                 $result = wfMsgExt( 'editsection-brackets', array( 'escape', 'replaceafter', 'language' => $lang ), $link );
1536                 $result = "<span class=\"editsection\">$result</span>";
1537
1538                 wfRunHooks( 'DoEditSectionLink', array( $this, $nt, $section, $tooltip, &$result, $lang ) );
1539                 return $result;
1540         }
1541
1542         /**
1543          * Use PHP's magic __call handler to intercept legacy calls to the linker
1544          * for backwards compatibility.
1545          *
1546          * @param $fname String Name of called method
1547          * @param $args Array Arguments to the method
1548          */
1549         function __call( $fname, $args ) {
1550                 $realFunction = array( 'Linker', $fname );
1551                 if ( is_callable( $realFunction ) ) {
1552                         return call_user_func_array( $realFunction, $args );
1553                 } else {
1554                         $className = get_class( $this );
1555                         throw new MWException( "Call to undefined method $className::$fname" );
1556                 }
1557         }
1558
1559 }