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                 $this->usercss = false;
 211         }
 212
 213         /**
 214          * Set the RequestContext used in this instance
 215          *
 216          * @param RequestContext $context
 217          */
 218         public function setContext( RequestContext $context ) {
 219                 $this->mContext = $context;
 220         }
 221
 222         /**
 223          * Get the RequestContext used in this instance
 224          *
 225          * @return RequestContext
 226          */
 227         public function getContext() {
 228                 if ( !isset($this->mContext) ) {
 229                         wfDebug( __METHOD__ . " called and \$mContext is null. Using RequestContext::getMain(); for sanity\n" );
 230                         $this->mContext = RequestContext::getMain();
 231                 }
 232                 return $this->mContext;
 233         }
 234
 235         /** Get the title
 236          *
 237          * @return Title
 238          */
 239         public function getTitle() {
 240                 return $this->getContext()->getTitle();
 241         }
 242
 243         /** Get the user
 244          *
 245          * @return User
 246          */
 247         public function getUser() {
 248                 return $this->getContext()->getUser();
 249         }
 250
 251         /**
 252          * Get the current revision ID
 253          *
 254          * @return Integer
 255          */
 256         public function getRevisionId() {
 257                 return $this->getContext()->getOutput()->getRevisionId();
 258         }
 259
 260         /**
 261          * Whether the revision displayed is the latest revision of the page
 262          *
 263          * @return Boolean
 264          */
 265         public function isRevisionCurrent() {
 266                 $revID = $this->getRevisionId();
 267                 return $revID == 0 || $revID == $this->getTitle()->getLatestRevID();
 268         }
 269
 270         /**
 271          * Set the "relevant" title
 272          * @see self::getRelevantTitle()
 273          * @param $t Title object to use
 274          */
 275         public function setRelevantTitle( $t ) {
 276                 $this->mRelevantTitle = $t;
 277         }
 278
 279         /**
 280          * Return the "relevant" title.
 281          * A "relevant" title is not necessarily the actual title of the page.
 282          * Special pages like Special:MovePage use set the page they are acting on
 283          * as their "relevant" title, this allows the skin system to display things
 284          * such as content tabs which belong to to that page instead of displaying
 285          * a basic special page tab which has almost no meaning.
 286          */
 287         public function getRelevantTitle() {
 288                 if ( isset($this->mRelevantTitle) ) {
 289                         return $this->mRelevantTitle;
 290                 }
 291                 return $this->getTitle();
 292         }
 293
 294         /**
 295          * Set the "relevant" user
 296          * @see self::getRelevantUser()
 297          * @param $u User object to use
 298          */
 299         public function setRelevantUser( $u ) {
 300                 $this->mRelevantUser = $u;
 301         }
 302
 303         /**
 304          * Return the "relevant" user.
 305          * A "relevant" user is similar to a relevant title. Special pages like
 306          * Special:Contributions mark the user which they are relevant to so that
 307          * things like the toolbox can display the information they usually are only
 308          * able to display on a user's userpage and talkpage.
 309          * @return User
 310          */
 311         public function getRelevantUser() {
 312                 if ( isset($this->mRelevantUser) ) {
 313                         return $this->mRelevantUser;
 314                 }
 315                 $title = $this->getRelevantTitle();
 316                 if( $title->getNamespace() == NS_USER || $title->getNamespace() == NS_USER_TALK ) {
 317                         $rootUser = strtok( $title->getText(), '/' );
 318                         if ( User::isIP( $rootUser ) ) {
 319                                 $this->mRelevantUser = User::newFromName( $rootUser, false );
 320                         } else {
 321                                 $user = User::newFromName( $rootUser );
 322                                 if ( $user->isLoggedIn() ) {
 323                                         $this->mRelevantUser = $user;
 324                                 }
 325                         }
 326                         return $this->mRelevantUser;
 327                 }
 328                 return null;
 329         }
 330
 331         /**
 332          * Outputs the HTML generated by other functions.
 333          * @param $out Object: instance of OutputPage
 334          */
 335         abstract function outputPage( OutputPage $out );
 336
 337         static function makeVariablesScript( $data ) {
 338                 if ( $data ) {
 339                         return Html::inlineScript(
 340                                 ResourceLoader::makeLoaderConditionalScript( ResourceLoader::makeConfigSetScript( $data ) )
 341                         );
 342                 } else {
 343                         return '';
 344                 }
 345         }
 346
 347         /**
 348          * To make it harder for someone to slip a user a fake
 349          * user-JavaScript or user-CSS preview, a random token
 350          * is associated with the login session. If it's not
 351          * passed back with the preview request, we won't render
 352          * the code.
 353          *
 354          * @param $action String: 'edit', 'submit' etc.
 355          * @return bool
 356          */
 357         public function userCanPreview( $action ) {
 358                 if ( $action != 'submit' ) {
 359                         return false;
 360                 }
 361                 if ( !$this->getContext()->getRequest()->wasPosted() ) {
 362                         return false;
 363                 }
 364                 if ( !$this->getTitle()->userCanEditCssSubpage() ) {
 365                         return false;
 366                 }
 367                 if ( !$this->getTitle()->userCanEditJsSubpage() ) {
 368                         return false;
 369                 }
 370
 371                 return $this->getContext()->getUser()->matchEditToken(
 372                         $this->getContext()->getRequest()->getVal( 'wpEditToken' ) );
 373         }
 374
 375         /**
 376          * Generated JavaScript action=raw&gen=js
 377          * This used to load MediaWiki:Common.js and the skin-specific style
 378          * before the RessourceLoader.
 379          *
 380          * @deprecated Use the RessourceLoader instead. This may be removed at some
 381          * point.
 382          * @param $skinName String: If set, overrides the skin name
 383          * @return String
 384          */
 385         public function generateUserJs( $skinName = null ) {
 386                 return '';
 387         }
 388
 389         /**
 390          * Generate user stylesheet for action=raw&gen=css
 391          *
 392          * @deprecated Use the RessourceLoader instead. This may be removed at some
 393          * point.
 394          * @return String
 395          */
 396         public function generateUserStylesheet() {
 397                 return '';
 398         }
 399
 400         /**
 401          * @private
 402          */
 403         function setupUserCss( OutputPage $out ) {
 404                 global $wgUseSiteCss, $wgAllowUserCss, $wgAllowUserCssPrefs;
 405
 406                 wfProfileIn( __METHOD__ );
 407
 408                 $this->setupSkinUserCss( $out );
 409                 // Add any extension CSS
 410                 foreach ( $out->getExtStyle() as $url ) {
 411                         $out->addStyle( $url );
 412                 }
 413
 414                 // Per-site custom styles
 415                 if ( $wgUseSiteCss ) {
 416                         $out->addModuleStyles( array( 'site', 'noscript' ) );
 417                         if( $this->getContext()->getUser()->isLoggedIn() ){
 418                                 $out->addModuleStyles( 'user.groups' );
 419                         }
 420                 }
 421
 422                 // Per-user custom styles
 423                 if ( $wgAllowUserCss ) {
 424                         if ( $this->getTitle()->isCssSubpage() && $this->userCanPreview( $this->getContext()->getRequest()->getVal( 'action' ) ) ) {
 425                                 // @FIXME: properly escape the cdata!
 426                                 $out->addInlineStyle( $this->getContext()->getRequest()->getText( 'wpTextbox1' ) );
 427                         } else {
 428                                 $out->addModuleStyles( 'user' );
 429                         }
 430                 }
 431
 432                 // Per-user preference styles
 433                 if ( $wgAllowUserCssPrefs ) {
 434                         $out->addModuleStyles( 'user.options' );
 435                 }
 436
 437                 wfProfileOut( __METHOD__ );
 438         }
 439
 440         /**
 441          * Get the query to generate a dynamic stylesheet
 442          *
 443          * @return array
 444          */
 445         public static function getDynamicStylesheetQuery() {
 446                 global $wgSquidMaxage;
 447
 448                 return array(
 449                                 'action' => 'raw',
 450                                 'maxage' => $wgSquidMaxage,
 451                                 'usemsgcache' => 'yes',
 452                                 'ctype' => 'text/css',
 453                                 'smaxage' => $wgSquidMaxage,
 454                         );
 455         }
 456
 457         /**
 458          * Add skin specific stylesheets
 459          * @param $out OutputPage
 460          * @delete
 461          */
 462         abstract function setupSkinUserCss( OutputPage $out );
 463
 464         /**
 465          * TODO: document
 466          * @param $title Title
 467          * @return String
 468          */
 469         function getPageClasses( $title ) {
 470                 $numeric = 'ns-' . $title->getNamespace();
 471
 472                 if ( $title->getNamespace() == NS_SPECIAL ) {
 473                         $type = 'ns-special';
 474                         // bug 23315: provide a class based on the canonical special page name without subpages
 475                         list( $canonicalName ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );
 476                         if ( $canonicalName ) {
 477                                 $type .= ' ' . Sanitizer::escapeClass( "mw-special-$canonicalName" );
 478                         } else {
 479                                 $type .= ' mw-invalidspecialpage';
 480                         }
 481                 } elseif ( $title->isTalkPage() ) {
 482                         $type = 'ns-talk';
 483                 } else {
 484                         $type = 'ns-subject';
 485                 }
 486
 487                 $name = Sanitizer::escapeClass( 'page-' . $title->getPrefixedText() );
 488
 489                 return "$numeric $type $name";
 490         }
 491
 492         /**
 493          * This will be called by OutputPage::headElement when it is creating the
 494          * <body> tag, skins can override it if they have a need to add in any
 495          * body attributes or classes of their own.
 496          */
 497         function addToBodyAttributes( $out, &$bodyAttrs ) {
 498                 // does nothing by default
 499         }
 500
 501         /**
 502          * URL to the logo
 503          */
 504         function getLogo() {
 505                 global $wgLogo;
 506                 return $wgLogo;
 507         }
 508
 509         /**
 510          * The format without an explicit $out argument is deprecated
 511          */
 512         function getCategoryLinks( OutputPage $out=null ) {
 513                 global $wgUseCategoryBrowser, $wgContLang;
 514
 515                 if( $out === null ){
 516                         $out = $this->getContext()->output;
 517                 }
 518
 519                 if ( count( $out->mCategoryLinks ) == 0 ) {
 520                         return '';
 521                 }
 522
 523                 # Separator
 524                 $sep = wfMsgExt( 'catseparator', array( 'parsemag', 'escapenoentities' ) );
 525
 526                 // Use Unicode bidi embedding override characters,
 527                 // to make sure links don't smash each other up in ugly ways.
 528                 $dir = $wgContLang->getDir();
 529                 $embed = "<span dir='$dir'>";
 530                 $pop = '</span>';
 531
 532                 $allCats = $out->getCategoryLinks();
 533                 $s = '';
 534                 $colon = wfMsgExt( 'colon-separator', 'escapenoentities' );
 535
 536                 if ( !empty( $allCats['normal'] ) ) {
 537                         $t = $embed . implode( "{$pop} {$sep} {$embed}" , $allCats['normal'] ) . $pop;
 538
 539                         $msg = wfMsgExt( 'pagecategories', array( 'parsemag', 'escapenoentities' ), count( $allCats['normal'] ) );
 540                         $s .= '<div id="mw-normal-catlinks">' .
 541                                 Linker::link( Title::newFromText( wfMsgForContent( 'pagecategorieslink' ) ), $msg )
 542                                 . $colon . $t . '</div>';
 543                 }
 544
 545                 # Hidden categories
 546                 if ( isset( $allCats['hidden'] ) ) {
 547                         if ( $this->getContext()->getUser()->getBoolOption( 'showhiddencats' ) ) {
 548                                 $class = 'mw-hidden-cats-user-shown';
 549                         } elseif ( $this->getTitle()->getNamespace() == NS_CATEGORY ) {
 550                                 $class = 'mw-hidden-cats-ns-shown';
 551                         } else {
 552                                 $class = 'mw-hidden-cats-hidden';
 553                         }
 554
 555                         $s .= "<div id=\"mw-hidden-catlinks\" class=\"$class\">" .
 556                                 wfMsgExt( 'hidden-categories', array( 'parsemag', 'escapenoentities' ), count( $allCats['hidden'] ) ) .
 557                                 $colon . $embed . implode( "$pop $sep $embed", $allCats['hidden'] ) . $pop .
 558                                 '</div>';
 559                 }
 560
 561                 # optional 'dmoz-like' category browser. Will be shown under the list
 562                 # of categories an article belong to
 563                 if ( $wgUseCategoryBrowser ) {
 564                         $s .= '<br /><hr />';
 565
 566                         # get a big array of the parents tree
 567                         $parenttree = $this->getTitle()->getParentCategoryTree();
 568                         # Skin object passed by reference cause it can not be
 569                         # accessed under the method subfunction drawCategoryBrowser
 570                         $tempout = explode( "\n", $this->drawCategoryBrowser( $parenttree, $this ) );
 571                         # Clean out bogus first entry and sort them
 572                         unset( $tempout[0] );
 573                         asort( $tempout );
 574                         # Output one per line
 575                         $s .= implode( "<br />\n", $tempout );
 576                 }
 577
 578                 return $s;
 579         }
 580
 581         /**
 582          * Render the array as a serie of links.
 583          * @param $tree Array: categories tree returned by Title::getParentCategoryTree
 584          * @return String separated by &gt;, terminate with "\n"
 585          */
 586         function drawCategoryBrowser( $tree ) {
 587                 $return = '';
 588
 589                 foreach ( $tree as $element => $parent ) {
 590                         if ( empty( $parent ) ) {
 591                                 # element start a new list
 592                                 $return .= "\n";
 593                         } else {
 594                                 # grab the others elements
 595                                 $return .= $this->drawCategoryBrowser( $parent ) . ' &gt; ';
 596                         }
 597
 598                         # add our current element to the list
 599                         $eltitle = Title::newFromText( $element );
 600                         $return .=  Linker::link( $eltitle, $eltitle->getText() );
 601                 }
 602
 603                 return $return;
 604         }
 605
 606         /**
 607          * The ->getCategories() form is deprecated, please instead use
 608          * the ->getCategories( $out ) form with whatout OutputPage is on hand
 609          */
 610         function getCategories( OutputPage $out=null ) {
 611
 612                 $catlinks = $this->getCategoryLinks( $out );
 613
 614                 $classes = 'catlinks';
 615
 616                 // Check what we're showing
 617                 $allCats = $out->getCategoryLinks();
 618                 $showHidden = $this->getContext()->getUser()->getBoolOption( 'showhiddencats' ) ||
 619                                                 $this->getTitle()->getNamespace() == NS_CATEGORY;
 620
 621                 if ( empty( $allCats['normal'] ) && !( !empty( $allCats['hidden'] ) && $showHidden ) ) {
 622                         $classes .= ' catlinks-allhidden';
 623                 }
 624
 625                 return "<div id='catlinks' class='$classes'>{$catlinks}</div>";
 626         }
 627
 628         /**
 629          * This runs a hook to allow extensions placing their stuff after content
 630          * and article metadata (e.g. categories).
 631          * Note: This function has nothing to do with afterContent().
 632          *
 633          * This hook is placed here in order to allow using the same hook for all
 634          * skins, both the SkinTemplate based ones and the older ones, which directly
 635          * use this class to get their data.
 636          *
 637          * The output of this function gets processed in SkinTemplate::outputPage() for
 638          * the SkinTemplate based skins, all other skins should directly echo it.
 639          *
 640          * Returns an empty string by default, if not changed by any hook function.
 641          */
 642         protected function afterContentHook() {
 643                 $data = '';
 644
 645                 if ( wfRunHooks( 'SkinAfterContent', array( &$data, $this ) ) ) {
 646                         // adding just some spaces shouldn't toggle the output
 647                         // of the whole <div/>, so we use trim() here
 648                         if ( trim( $data ) != '' ) {
 649                                 // Doing this here instead of in the skins to
 650                                 // ensure that the div has the same ID in all
 651                                 // skins
 652                                 $data = "<div id='mw-data-after-content'>\n" .
 653                                         "\t$data\n" .
 654                                         "</div>\n";
 655                         }
 656                 } else {
 657                         wfDebug( "Hook SkinAfterContent changed output processing.\n" );
 658                 }
 659
 660                 return $data;
 661         }
 662
 663         /**
 664          * Generate debug data HTML for displaying at the bottom of the main content
 665          * area.
 666          * @return String HTML containing debug data, if enabled (otherwise empty).
 667          */
 668         protected function generateDebugHTML( OutputPage $out ) {
 669                 global $wgShowDebug;
 670
 671                 if ( $wgShowDebug ) {
 672                         $listInternals = $this->formatDebugHTML( $out->mDebugtext );
 673                         return "\n<hr />\n<strong>Debug data:</strong><ul id=\"mw-debug-html\">" .
 674                                 $listInternals . "</ul>\n";
 675                 }
 676
 677                 return '';
 678         }
 679
 680         private function formatDebugHTML( $debugText ) {
 681                 global $wgDebugTimestamps;
 682
 683                 $lines = explode( "\n", $debugText );
 684                 $curIdent = 0;
 685                 $ret = '<li>';
 686
 687                 foreach ( $lines as $line ) {
 688                         $pre = '';
 689                         if ( $wgDebugTimestamps ) {
 690                                 $matches = array();
 691                                 if ( preg_match( '/^(\d+\.\d+\s{2})/', $line, $matches ) ) {
 692                                         $pre = $matches[1];
 693                                         $line = substr( $line, strlen( $pre ) );
 694                                 }
 695                         }
 696                         $display = ltrim( $line );
 697                         $ident = strlen( $line ) - strlen( $display );
 698                         $diff = $ident - $curIdent;
 699
 700                         $display = $pre . $display;
 701                         if ( $display == '' ) {
 702                                 $display = "\xc2\xa0";
 703                         }
 704
 705                         if ( !$ident && $diff < 0 && substr( $display, 0, 9 ) != 'Entering ' && substr( $display, 0, 8 ) != 'Exiting ' ) {
 706                                 $ident = $curIdent;
 707                                 $diff = 0;
 708                                 $display = '<span style="background:yellow;">' . htmlspecialchars( $display ) . '</span>';
 709                         } else {
 710                                 $display = htmlspecialchars( $display );
 711                         }
 712
 713                         if ( $diff < 0 ) {
 714                                 $ret .= str_repeat( "</li></ul>\n", -$diff ) . "</li><li>\n";
 715                         } elseif ( $diff == 0 ) {
 716                                 $ret .= "</li><li>\n";
 717                         } else {
 718                                 $ret .= str_repeat( "<ul><li>\n", $diff );
 719                         }
 720                         $ret .= "<tt>$display</tt>\n";
 721
 722                         $curIdent = $ident;
 723                 }
 724
 725                 $ret .= str_repeat( '</li></ul>', $curIdent ) . '</li>';
 726
 727                 return $ret;
 728         }
 729
 730         /**
 731          * This gets called shortly before the </body> tag.
 732          * @param $out OutputPage object
 733          * @return String HTML-wrapped JS code to be put before </body>
 734          */
 735         function bottomScripts( $out ) {
 736                 // TODO and the suckage continues. This function is really just a wrapper around
 737                 // OutputPage::getBottomScripts() which takes a Skin param. This should be cleaned
 738                 // up at some point
 739                 $bottomScriptText = $out->getBottomScripts( $this );
 740                 wfRunHooks( 'SkinAfterBottomScripts', array( $this, &$bottomScriptText ) );
 741
 742                 return $bottomScriptText;
 743         }
 744
 745         /** @return string Retrievied from HTML text */
 746         function printSource() {
 747                 $url = htmlspecialchars( $this->getTitle()->getFullURL() );
 748                 return wfMsg( 'retrievedfrom', '<a href="' . $url . '">' . $url . '</a>' );
 749         }
 750
 751         function getUndeleteLink() {
 752                 $action = $this->getContext()->getRequest()->getVal( 'action', 'view' );
 753
 754                 if ( $this->getContext()->getUser()->isAllowed( 'deletedhistory' ) &&
 755                         ( $this->getTitle()->getArticleId() == 0 || $action == 'history' ) ) {
 756                         $n = $this->getTitle()->isDeleted();
 757
 758                         if ( $n ) {
 759                                 if ( $this->getContext()->getUser()->isAllowed( 'undelete' ) ) {
 760                                         $msg = 'thisisdeleted';
 761                                 } else {
 762                                         $msg = 'viewdeleted';
 763                                 }
 764
 765                                 return wfMsg(
 766                                         $msg,
 767                                         Linker::link(
 768                                                 SpecialPage::getTitleFor( 'Undelete', $this->getTitle()->getPrefixedDBkey() ),
 769                                                 wfMsgExt( 'restorelink', array( 'parsemag', 'escape' ), $this->getContext()->getLang()->formatNum( $n ) ),
 770                                                 array(),
 771                                                 array(),
 772                                                 array( 'known', 'noclasses' )
 773                                         )
 774                                 );
 775                         }
 776                 }
 777
 778                 return '';
 779         }
 780
 781         /**
 782          * The format without an explicit $out argument is deprecated
 783          */
 784         function subPageSubtitle( OutputPage $out=null ) {
 785                 $out = $this->getContext()->getOutput();
 786                 $subpages = '';
 787
 788                 if ( !wfRunHooks( 'SkinSubPageSubtitle', array( &$subpages, $this, $out ) ) ) {
 789                         return $subpages;
 790                 }
 791
 792                 if ( $out->isArticle() && MWNamespace::hasSubpages( $out->getTitle()->getNamespace() ) ) {
 793                         $ptext = $this->getTitle()->getPrefixedText();
 794                         if ( preg_match( '/\//', $ptext ) ) {
 795                                 $links = explode( '/', $ptext );
 796                                 array_pop( $links );
 797                                 $c = 0;
 798                                 $growinglink = '';
 799                                 $display = '';
 800
 801                                 foreach ( $links as $link ) {
 802                                         $growinglink .= $link;
 803                                         $display .= $link;
 804                                         $linkObj = Title::newFromText( $growinglink );
 805
 806                                         if ( is_object( $linkObj ) && $linkObj->exists() ) {
 807                                                 $getlink = $this->link(
 808                                                         $linkObj,
 809                                                         htmlspecialchars( $display ),
 810                                                         array(),
 811                                                         array(),
 812                                                         array( 'known', 'noclasses' )
 813                                                 );
 814
 815                                                 $c++;
 816
 817                                                 if ( $c > 1 ) {
 818                                                         $subpages .= wfMsgExt( 'pipe-separator', 'escapenoentities' );
 819                                                 } else  {
 820                                                         $subpages .= '&lt; ';
 821                                                 }
 822
 823                                                 $subpages .= $getlink;
 824                                                 $display = '';
 825                                         } else {
 826                                                 $display .= '/';
 827                                         }
 828                                         $growinglink .= '/';
 829                                 }
 830                         }
 831                 }
 832
 833                 return $subpages;
 834         }
 835
 836         /**
 837          * Returns true if the IP should be shown in the header
 838          */
 839         function showIPinHeader() {
 840                 global $wgShowIPinHeader;
 841                 return $wgShowIPinHeader && session_id() != '';
 842         }
 843
 844         function getSearchLink() {
 845                 $searchPage = SpecialPage::getTitleFor( 'Search' );
 846                 return $searchPage->getLocalURL();
 847         }
 848
 849         function escapeSearchLink() {
 850                 return htmlspecialchars( $this->getSearchLink() );
 851         }
 852
 853         function getCopyright( $type = 'detect' ) {
 854                 global $wgRightsPage, $wgRightsUrl, $wgRightsText;
 855
 856                 if ( $type == 'detect' ) {
 857                         $diff = $this->getContext()->getRequest()->getVal( 'diff' );
 858
 859                         if ( is_null( $diff ) && !$this->isRevisionCurrent() && wfMsgForContent( 'history_copyright' ) !== '-' ) {
 860                                 $type = 'history';
 861                         } else {
 862                                 $type = 'normal';
 863                         }
 864                 }
 865
 866                 if ( $type == 'history' ) {
 867                         $msg = 'history_copyright';
 868                 } else {
 869                         $msg = 'copyright';
 870                 }
 871
 872                 $out = '';
 873
 874                 if ( $wgRightsPage ) {
 875                         $title = Title::newFromText( $wgRightsPage );
 876                         $link = Linker::linkKnown( $title, $wgRightsText );
 877                 } elseif ( $wgRightsUrl ) {
 878                         $link = Linker::makeExternalLink( $wgRightsUrl, $wgRightsText );
 879                 } elseif ( $wgRightsText ) {
 880                         $link = $wgRightsText;
 881                 } else {
 882                         # Give up now
 883                         return $out;
 884                 }
 885
 886                 // Allow for site and per-namespace customization of copyright notice.
 887                 $forContent = true;
 888
 889                 wfRunHooks( 'SkinCopyrightFooter', array( $this->getTitle(), $type, &$msg, &$link, &$forContent ) );
 890
 891                 if ( $forContent ) {
 892                         $out .= wfMsgForContent( $msg, $link );
 893                 } else {
 894                         $out .= wfMsg( $msg, $link );
 895                 }
 896
 897                 return $out;
 898         }
 899
 900         function getCopyrightIcon() {
 901                 global $wgRightsUrl, $wgRightsText, $wgRightsIcon, $wgCopyrightIcon;
 902
 903                 $out = '';
 904
 905                 if ( isset( $wgCopyrightIcon ) && $wgCopyrightIcon ) {
 906                         $out = $wgCopyrightIcon;
 907                 } elseif ( $wgRightsIcon ) {
 908                         $icon = htmlspecialchars( $wgRightsIcon );
 909
 910                         if ( $wgRightsUrl ) {
 911                                 $url = htmlspecialchars( $wgRightsUrl );
 912                                 $out .= '<a href="' . $url . '">';
 913                         }
 914
 915                         $text = htmlspecialchars( $wgRightsText );
 916                         $out .= "<img src=\"$icon\" alt=\"$text\" width=\"88\" height=\"31\" />";
 917
 918                         if ( $wgRightsUrl ) {
 919                                 $out .= '</a>';
 920                         }
 921                 }
 922
 923                 return $out;
 924         }
 925
 926         /**
 927          * Gets the powered by MediaWiki icon.
 928          * @return string
 929          */
 930         function getPoweredBy() {
 931                 global $wgStylePath;
 932
 933                 $url = htmlspecialchars( "$wgStylePath/common/images/poweredby_mediawiki_88x31.png" );
 934                 $text = '<a href="http://www.mediawiki.org/"><img src="' . $url . '" height="31" width="88" alt="Powered by MediaWiki" /></a>';
 935                 wfRunHooks( 'SkinGetPoweredBy', array( &$text, $this ) );
 936                 return $text;
 937         }
 938
 939         /**
 940          * Get the timestamp of the latest revision, formatted in user language
 941          *
 942          * @param $article Article object. Used if we're working with the current revision
 943          * @return String
 944          */
 945         protected function lastModified( $article ) {
 946                 if ( !$this->isRevisionCurrent() ) {
 947                         $timestamp = Revision::getTimestampFromId( $this->getTitle(), $this->getRevisionId() );
 948                 } else {
 949                         $timestamp = $article->getTimestamp();
 950                 }
 951
 952                 if ( $timestamp ) {
 953                         $d = $this->getContext()->getLang()->date( $timestamp, true );
 954                         $t = $this->getContext()->getLang()->time( $timestamp, true );
 955                         $s = ' ' . wfMsg( 'lastmodifiedat', $d, $t );
 956                 } else {
 957                         $s = '';
 958                 }
 959
 960                 if ( wfGetLB()->getLaggedSlaveMode() ) {
 961                         $s .= ' <strong>' . wfMsg( 'laggedslavemode' ) . '</strong>';
 962                 }
 963
 964                 return $s;
 965         }
 966
 967         function logoText( $align = '' ) {
 968                 if ( $align != '' ) {
 969                         $a = " align='{$align}'";
 970                 } else {
 971                         $a = '';
 972                 }
 973
 974                 $mp = wfMsg( 'mainpage' );
 975                 $mptitle = Title::newMainPage();
 976                 $url = ( is_object( $mptitle ) ? $mptitle->escapeLocalURL() : '' );
 977
 978                 $logourl = $this->getLogo();
 979                 $s = "<a href='{$url}'><img{$a} src='{$logourl}' alt='[{$mp}]' /></a>";
 980
 981                 return $s;
 982         }
 983
 984         /**
 985          * Renders a $wgFooterIcons icon acording to the method's arguments
 986          * @param $icon Array: The icon to build the html for, see $wgFooterIcons for the format of this array
 987          * @param $withImage Boolean: Whether to use the icon's image or output a text-only footericon
 988          */
 989         function makeFooterIcon( $icon, $withImage = 'withImage' ) {
 990                 if ( is_string( $icon ) ) {
 991                         $html = $icon;
 992                 } else { // Assuming array
 993                         $url = isset($icon["url"]) ? $icon["url"] : null;
 994                         unset( $icon["url"] );
 995                         if ( isset( $icon["src"] ) && $withImage === 'withImage' ) {
 996                                 $html = Html::element( 'img', $icon ); // do this the lazy way, just pass icon data as an attribute array
 997                         } else {
 998                                 $html = htmlspecialchars( $icon["alt"] );
 999                         }
1000                         if ( $url ) {
1001                                 $html = Html::rawElement( 'a', array( "href" => $url ), $html );
1002                         }
1003                 }
1004                 return $html;
1005         }
1006
1007         /**
1008          * Gets the link to the wiki's main page.
1009          * @return string
1010          */
1011         function mainPageLink() {
1012                 $s = Linker::link(
1013                         Title::newMainPage(),
1014                         wfMsg( 'mainpage' ),
1015                         array(),
1016                         array(),
1017                         array( 'known', 'noclasses' )
1018                 );
1019
1020                 return $s;
1021         }
1022
1023         public function footerLink( $desc, $page ) {
1024                 // if the link description has been set to "-" in the default language,
1025                 if ( wfMsgForContent( $desc )  == '-' ) {
1026                         // then it is disabled, for all languages.
1027                         return '';
1028                 } else {
1029                         // Otherwise, we display the link for the user, described in their
1030                         // language (which may or may not be the same as the default language),
1031                         // but we make the link target be the one site-wide page.
1032                         $title = Title::newFromText( wfMsgForContent( $page ) );
1033
1034                         return Linker::linkKnown(
1035                                 $title,
1036                                 wfMsgExt( $desc, array( 'parsemag', 'escapenoentities' ) )
1037                         );
1038                 }
1039         }
1040
1041         /**
1042          * Gets the link to the wiki's privacy policy page.
1043          */
1044         function privacyLink() {
1045                 return $this->footerLink( 'privacy', 'privacypage' );
1046         }
1047
1048         /**
1049          * Gets the link to the wiki's about page.
1050          */
1051         function aboutLink() {
1052                 return $this->footerLink( 'aboutsite', 'aboutpage' );
1053         }
1054
1055         /**
1056          * Gets the link to the wiki's general disclaimers page.
1057          */
1058         function disclaimerLink() {
1059                 return $this->footerLink( 'disclaimers', 'disclaimerpage' );
1060         }
1061
1062         /**
1063          * Return URL options for the 'edit page' link.
1064          * This may include an 'oldid' specifier, if the current page view is such.
1065          *
1066          * @return array
1067          * @private
1068          */
1069         function editUrlOptions() {
1070                 $options = array( 'action' => 'edit' );
1071
1072                 if ( !$this->isRevisionCurrent() ) {
1073                         $options['oldid'] = intval( $this->getRevisionId() );
1074                 }
1075
1076                 return $options;
1077         }
1078
1079         function showEmailUser( $id ) {
1080                 $targetUser = User::newFromId( $id );
1081                 return $this->getContext()->getUser()->canSendEmail() && # the sending user must have a confirmed email address
1082                         $targetUser->canReceiveEmail(); # the target user must have a confirmed email address and allow emails from users
1083         }
1084
1085         /**
1086          * Return a fully resolved style path url to images or styles stored in the common folder.
1087          * This method returns a url resolved using the configured skin style path
1088          * and includes the style version inside of the url.
1089          * @param $name String: The name or path of a skin resource file
1090          * @return String The fully resolved style path url including styleversion
1091          */
1092         function getCommonStylePath( $name ) {
1093                 global $wgStylePath, $wgStyleVersion;
1094                 return "$wgStylePath/common/$name?$wgStyleVersion";
1095         }
1096
1097         /**
1098          * Return a fully resolved style path url to images or styles stored in the curent skins's folder.
1099          * This method returns a url resolved using the configured skin style path
1100          * and includes the style version inside of the url.
1101          * @param $name String: The name or path of a skin resource file
1102          * @return String The fully resolved style path url including styleversion
1103          */
1104         function getSkinStylePath( $name ) {
1105                 global $wgStylePath, $wgStyleVersion;
1106                 return "$wgStylePath/{$this->stylename}/$name?$wgStyleVersion";
1107         }
1108
1109         /* these are used extensively in SkinTemplate, but also some other places */
1110         static function makeMainPageUrl( $urlaction = '' ) {
1111                 $title = Title::newMainPage();
1112                 self::checkTitle( $title, '' );
1113
1114                 return $title->getLocalURL( $urlaction );
1115         }
1116
1117         static function makeSpecialUrl( $name, $urlaction = '' ) {
1118                 $title = SpecialPage::getSafeTitleFor( $name );
1119                 return $title->getLocalURL( $urlaction );
1120         }
1121
1122         static function makeSpecialUrlSubpage( $name, $subpage, $urlaction = '' ) {
1123                 $title = SpecialPage::getSafeTitleFor( $name, $subpage );
1124                 return $title->getLocalURL( $urlaction );
1125         }
1126
1127         static function makeI18nUrl( $name, $urlaction = '' ) {
1128                 $title = Title::newFromText( wfMsgForContent( $name ) );
1129                 self::checkTitle( $title, $name );
1130                 return $title->getLocalURL( $urlaction );
1131         }
1132
1133         static function makeUrl( $name, $urlaction = '' ) {
1134                 $title = Title::newFromText( $name );
1135                 self::checkTitle( $title, $name );
1136
1137                 return $title->getLocalURL( $urlaction );
1138         }
1139
1140         /**
1141          * If url string starts with http, consider as external URL, else
1142          * internal
1143          */
1144         static function makeInternalOrExternalUrl( $name ) {
1145                 if ( preg_match( '/^(?:' . wfUrlProtocols() . ')/', $name ) ) {
1146                         return $name;
1147                 } else {
1148                         return self::makeUrl( $name );
1149                 }
1150         }
1151
1152         # this can be passed the NS number as defined in Language.php
1153         static function makeNSUrl( $name, $urlaction = '', $namespace = NS_MAIN ) {
1154                 $title = Title::makeTitleSafe( $namespace, $name );
1155                 self::checkTitle( $title, $name );
1156
1157                 return $title->getLocalURL( $urlaction );
1158         }
1159
1160         /* these return an array with the 'href' and boolean 'exists' */
1161         static function makeUrlDetails( $name, $urlaction = '' ) {
1162                 $title = Title::newFromText( $name );
1163                 self::checkTitle( $title, $name );
1164
1165                 return array(
1166                         'href' => $title->getLocalURL( $urlaction ),
1167                         'exists' => $title->getArticleID() != 0,
1168                 );
1169         }
1170
1171         /**
1172          * Make URL details where the article exists (or at least it's convenient to think so)
1173          */
1174         static function makeKnownUrlDetails( $name, $urlaction = '' ) {
1175                 $title = Title::newFromText( $name );
1176                 self::checkTitle( $title, $name );
1177
1178                 return array(
1179                         'href' => $title->getLocalURL( $urlaction ),
1180                         'exists' => true
1181                 );
1182         }
1183
1184         # make sure we have some title to operate on
1185         static function checkTitle( &$title, $name ) {
1186                 if ( !is_object( $title ) ) {
1187                         $title = Title::newFromText( $name );
1188                         if ( !is_object( $title ) ) {
1189                                 $title = Title::newFromText( '--error: link target missing--' );
1190                         }
1191                 }
1192         }
1193
1194         /**
1195          * Build an array that represents the sidebar(s), the navigation bar among them
1196          *
1197          * @return array
1198          */
1199         function buildSidebar() {
1200                 global $parserMemc, $wgEnableSidebarCache, $wgSidebarCacheExpiry;
1201                 wfProfileIn( __METHOD__ );
1202
1203                 $key = wfMemcKey( 'sidebar', $this->getContext()->getLang()->getCode() );
1204
1205                 if ( $wgEnableSidebarCache ) {
1206                         $cachedsidebar = $parserMemc->get( $key );
1207                         if ( $cachedsidebar ) {
1208                                 wfProfileOut( __METHOD__ );
1209                                 return $cachedsidebar;
1210                         }
1211                 }
1212
1213                 $bar = array();
1214                 $this->addToSidebar( $bar, 'sidebar' );
1215
1216                 wfRunHooks( 'SkinBuildSidebar', array( $this, &$bar ) );
1217                 if ( $wgEnableSidebarCache ) {
1218                         $parserMemc->set( $key, $bar, $wgSidebarCacheExpiry );
1219                 }
1220
1221                 wfProfileOut( __METHOD__ );
1222                 return $bar;
1223         }
1224         /**
1225          * Add content from a sidebar system message
1226          * Currently only used for MediaWiki:Sidebar (but may be used by Extensions)
1227          *
1228          * This is just a wrapper around addToSidebarPlain() for backwards compatibility
1229          *
1230          * @param &$bar array
1231          * @param $message String
1232          */
1233         function addToSidebar( &$bar, $message ) {
1234                 $this->addToSidebarPlain( $bar, wfMsgForContentNoTrans( $message ) );
1235         }
1236
1237         /**
1238          * Add content from plain text
1239          * @since 1.17
1240          * @param &$bar array
1241          * @param $text string
1242          */
1243         function addToSidebarPlain( &$bar, $text ) {
1244                 $lines = explode( "\n", $text );
1245                 $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.
1246
1247                 $heading = '';
1248
1249                 foreach ( $lines as $line ) {
1250                         if ( strpos( $line, '*' ) !== 0 ) {
1251                                 continue;
1252                         }
1253
1254                         if ( strpos( $line, '**' ) !== 0 ) {
1255                                 $heading = trim( $line, '* ' );
1256                                 if ( !array_key_exists( $heading, $bar ) ) {
1257                                         $bar[$heading] = array();
1258                                 }
1259                         } else {
1260                                 $line = trim( $line, '* ' );
1261
1262                                 if ( strpos( $line, '|' ) !== false ) { // sanity check
1263                                         $line = MessageCache::singleton()->transform( $line, false, null, $this->getTitle() );
1264                                         $line = array_map( 'trim', explode( '|', $line, 2 ) );
1265                                         $link = wfMsgForContent( $line[0] );
1266
1267                                         if ( $link == '-' ) {
1268                                                 continue;
1269                                         }
1270
1271                                         $text = wfMsgExt( $line[1], 'parsemag' );
1272
1273                                         if ( wfEmptyMsg( $line[1] ) ) {
1274                                                 $text = $line[1];
1275                                         }
1276
1277                                         if ( wfEmptyMsg( $line[0] ) ) {
1278                                                 $link = $line[0];
1279                                         }
1280
1281                                         if ( preg_match( '/^(?:' . wfUrlProtocols() . ')/', $link ) ) {
1282                                                 $href = $link;
1283                                         } else {
1284                                                 $title = Title::newFromText( $link );
1285
1286                                                 if ( $title ) {
1287                                                         $title = $title->fixSpecialName();
1288                                                         $href = $title->getLocalURL();
1289                                                 } else {
1290                                                         $href = 'INVALID-TITLE';
1291                                                 }
1292                                         }
1293
1294                                         $bar[$heading][] = array(
1295                                                 'text' => $text,
1296                                                 'href' => $href,
1297                                                 'id' => 'n-' . strtr( $line[1], ' ', '-' ),
1298                                                 'active' => false
1299                                         );
1300                                 } else if ( ( substr( $line, 0, 2 ) == '{{' ) && ( substr( $line, -2 ) == '}}' ) ) {
1301                                         global $wgParser;
1302
1303                                         $line = substr( $line, 2, strlen( $line ) - 4 );
1304
1305                                         $options = new ParserOptions();
1306                                         $options->setEditSection( false );
1307                                         $options->setInterfaceMessage( true );
1308                                         $wikiBar[$heading] = $wgParser->parse( wfMsgForContentNoTrans( $line ) , $this->getTitle(), $options )->getText();
1309                                 } else {
1310                                         continue;
1311                                 }
1312                         }
1313                 }
1314
1315                 if ( count( $wikiBar ) > 0 ) {
1316                         $bar = array_merge( $bar, $wikiBar );
1317                 }
1318
1319                 return $bar;
1320         }
1321
1322         /**
1323          * Should we include common/wikiprintable.css?  Skins that have their own
1324          * print stylesheet should override this and return false.  (This is an
1325          * ugly hack to get Monobook to play nicely with
1326          * OutputPage::headElement().)
1327          *
1328          * @return bool
1329          */
1330         public function commonPrintStylesheet() {
1331                 return true;
1332         }
1333
1334         /**
1335          * Gets new talk page messages for the current user.
1336          * @return MediaWiki message or if no new talk page messages, nothing
1337          */
1338         function getNewtalks() {
1339                 $out = $this->getContext()->getOutput();
1340
1341                 $newtalks = $this->getContext()->getUser()->getNewMessageLinks();
1342                 $ntl = '';
1343
1344                 if ( count( $newtalks ) == 1 && $newtalks[0]['wiki'] === wfWikiID() ) {
1345                         $userTitle = $this->getUser()->getUserPage();
1346                         $userTalkTitle = $userTitle->getTalkPage();
1347
1348                         if ( !$userTalkTitle->equals( $out->getTitle() ) ) {
1349                                 $newMessagesLink = $this->link(
1350                                         $userTalkTitle,
1351                                         wfMsgHtml( 'newmessageslink' ),
1352                                         array(),
1353                                         array( 'redirect' => 'no' ),
1354                                         array( 'known', 'noclasses' )
1355                                 );
1356
1357                                 $newMessagesDiffLink = $this->link(
1358                                         $userTalkTitle,
1359                                         wfMsgHtml( 'newmessagesdifflink' ),
1360                                         array(),
1361                                         array( 'diff' => 'cur' ),
1362                                         array( 'known', 'noclasses' )
1363                                 );
1364
1365                                 $ntl = wfMsg(
1366                                         'youhavenewmessages',
1367                                         $newMessagesLink,
1368                                         $newMessagesDiffLink
1369                                 );
1370                                 # Disable Squid cache
1371                                 $out->setSquidMaxage( 0 );
1372                         }
1373                 } elseif ( count( $newtalks ) ) {
1374                         // _>" " for BC <= 1.16
1375                         $sep = str_replace( '_', ' ', wfMsgHtml( 'newtalkseparator' ) );
1376                         $msgs = array();
1377
1378                         foreach ( $newtalks as $newtalk ) {
1379                                 $msgs[] = Xml::element(
1380                                         'a',
1381                                         array( 'href' => $newtalk['link'] ), $newtalk['wiki']
1382                                 );
1383                         }
1384                         $parts = implode( $sep, $msgs );
1385                         $ntl = wfMsgHtml( 'youhavenewmessagesmulti', $parts );
1386                         $out->setSquidMaxage( 0 );
1387                 }
1388
1389                 return $ntl;
1390         }
1391
1392         /**
1393          * Get a cached notice
1394          *
1395          * @param $name String: message name, or 'default' for $wgSiteNotice
1396          * @return String: HTML fragment
1397          */
1398         private function getCachedNotice( $name ) {
1399                 global $wgRenderHashAppend, $parserMemc;
1400
1401                 wfProfileIn( __METHOD__ );
1402
1403                 $needParse = false;
1404
1405                 if( $name === 'default' ) {
1406                         // special case
1407                         global $wgSiteNotice;
1408                         $notice = $wgSiteNotice;
1409                         if( empty( $notice ) ) {
1410                                 wfProfileOut( __METHOD__ );
1411                                 return false;
1412                         }
1413                 } else {
1414                         $msg = wfMessage( $name )->inContentLanguage();
1415                         if( $msg->isDisabled() ) {
1416                                 wfProfileOut( __METHOD__ );
1417                                 return false;
1418                         }
1419                         $notice = $msg->plain();
1420                 }
1421
1422                 // Use the extra hash appender to let eg SSL variants separately cache.
1423                 $key = wfMemcKey( $name . $wgRenderHashAppend );
1424                 $cachedNotice = $parserMemc->get( $key );
1425                 if( is_array( $cachedNotice ) ) {
1426                         if( md5( $notice ) == $cachedNotice['hash'] ) {
1427                                 $notice = $cachedNotice['html'];
1428                         } else {
1429                                 $needParse = true;
1430                         }
1431                 } else {
1432                         $needParse = true;
1433                 }
1434
1435                 if ( $needParse ) {
1436                         $parsed = $this->getContext()->getOutput()->parse( $notice );
1437                         $parserMemc->set( $key, array( 'html' => $parsed, 'hash' => md5( $notice ) ), 600 );
1438                         $notice = $parsed;
1439                 }
1440
1441                 $notice = '<div id="localNotice">' .$notice . '</div>';
1442                 wfProfileOut( __METHOD__ );
1443                 return $notice;
1444         }
1445
1446         /**
1447          * Get a notice based on page's namespace
1448          *
1449          * @return String: HTML fragment
1450          */
1451         function getNamespaceNotice() {
1452                 wfProfileIn( __METHOD__ );
1453
1454                 $key = 'namespacenotice-' . $this->getTitle()->getNsText();
1455                 $namespaceNotice = $this->getCachedNotice( $key );
1456                 if ( $namespaceNotice && substr( $namespaceNotice, 0, 7 ) != '<p>&lt;' ) {
1457                         $namespaceNotice = '<div id="namespacebanner">' . $namespaceNotice . '</div>';
1458                 } else {
1459                         $namespaceNotice = '';
1460                 }
1461
1462                 wfProfileOut( __METHOD__ );
1463                 return $namespaceNotice;
1464         }
1465
1466         /**
1467          * Get the site notice
1468          *
1469          * @return String: HTML fragment
1470          */
1471         function getSiteNotice() {
1472                 wfProfileIn( __METHOD__ );
1473                 $siteNotice = '';
1474
1475                 if ( wfRunHooks( 'SiteNoticeBefore', array( &$siteNotice, $this ) ) ) {
1476                         if ( is_object( $this->getContext()->getUser() ) && $this->getContext()->getUser()->isLoggedIn() ) {
1477                                 $siteNotice = $this->getCachedNotice( 'sitenotice' );
1478                         } else {
1479                                 $anonNotice = $this->getCachedNotice( 'anonnotice' );
1480                                 if ( !$anonNotice ) {
1481                                         $siteNotice = $this->getCachedNotice( 'sitenotice' );
1482                                 } else {
1483                                         $siteNotice = $anonNotice;
1484                                 }
1485                         }
1486                         if ( !$siteNotice ) {
1487                                 $siteNotice = $this->getCachedNotice( 'default' );
1488                         }
1489                 }
1490
1491                 wfRunHooks( 'SiteNoticeAfter', array( &$siteNotice, $this ) );
1492                 wfProfileOut( __METHOD__ );
1493                 return $siteNotice;
1494         }
1495
1496         /**
1497          * Create a section edit link.  This supersedes editSectionLink() and
1498          * editSectionLinkForOther().
1499          *
1500          * @param $nt      Title  The title being linked to (may not be the same as
1501          *   $wgTitle, if the section is included from a template)
1502          * @param $section string The designation of the section being pointed to,
1503          *   to be included in the link, like "&section=$section"
1504          * @param $tooltip string The tooltip to use for the link: will be escaped
1505          *   and wrapped in the 'editsectionhint' message
1506          * @param $lang    string Language code
1507          * @return         string HTML to use for edit link
1508          */
1509         public function doEditSectionLink( Title $nt, $section, $tooltip = null, $lang = false ) {
1510                 // HTML generated here should probably have userlangattributes
1511                 // added to it for LTR text on RTL pages
1512                 $attribs = array();
1513                 if ( !is_null( $tooltip ) ) {
1514                         # Bug 25462: undo double-escaping.
1515                         $tooltip = Sanitizer::decodeCharReferences( $tooltip );
1516                         $attribs['title'] = wfMsgExt( 'editsectionhint', array( 'language' => $lang, 'parsemag' ), $tooltip );
1517                 }
1518                 $link = Linker::link( $nt, wfMsgExt( 'editsection', array( 'language' => $lang ) ),
1519                         $attribs,
1520                         array( 'action' => 'edit', 'section' => $section ),
1521                         array( 'noclasses', 'known' )
1522                 );
1523
1524                 # Run the old hook.  This takes up half of the function . . . hopefully
1525                 # we can rid of it someday.
1526                 $attribs = '';
1527                 if ( $tooltip ) {
1528                         $attribs = wfMsgExt( 'editsectionhint', array( 'language' => $lang, 'parsemag', 'escape' ), $tooltip );
1529                         $attribs = " title=\"$attribs\"";
1530                 }
1531                 $result = null;
1532                 wfRunHooks( 'EditSectionLink', array( &$this, $nt, $section, $attribs, $link, &$result, $lang ) );
1533                 if ( !is_null( $result ) ) {
1534                         # For reverse compatibility, add the brackets *after* the hook is
1535                         # run, and even add them to hook-provided text.  (This is the main
1536                         # reason that the EditSectionLink hook is deprecated in favor of
1537                         # DoEditSectionLink: it can't change the brackets or the span.)
1538                         $result = wfMsgExt( 'editsection-brackets', array( 'escape', 'replaceafter', 'language' => $lang ), $result );
1539                         return "<span class=\"editsection\">$result</span>";
1540                 }
1541
1542                 # Add the brackets and the span, and *then* run the nice new hook, with
1543                 # clean and non-redundant arguments.
1544                 $result = wfMsgExt( 'editsection-brackets', array( 'escape', 'replaceafter', 'language' => $lang ), $link );
1545                 $result = "<span class=\"editsection\">$result</span>";
1546
1547                 wfRunHooks( 'DoEditSectionLink', array( $this, $nt, $section, $tooltip, &$result, $lang ) );
1548                 return $result;
1549         }
1550
1551         /**
1552          * Use PHP's magic __call handler to intercept legacy calls to the linker
1553          * for backwards compatibility.
1554          *
1555          * @param $fname String Name of called method
1556          * @param $args Array Arguments to the method
1557          */
1558         function __call( $fname, $args ) {
1559                 $realFunction = array( 'Linker', $fname );
1560                 if ( is_callable( $realFunction ) ) {
1561                         return call_user_func_array( $realFunction, $args );
1562                 } else {
1563                         $className = get_class( $this );
1564                         throw new MWException( "Call to undefined method $className::$fname" );
1565                 }
1566         }
1567
1568 }