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                 } elseif ( 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 = $t;
 276         }
 277
 278         /**
 279          * Return the "relevant" title.
 280          * A "relevant" title is not necessarily the actual title of the page.
 281          * Special pages like Special:MovePage use set the page they are acting on
 282          * as their "relevant" title, this allows the skin system to display things
 283          * such as content tabs which belong to to that page instead of displaying
 284          * a basic special page tab which has almost no meaning.
 285          *
 286          * @return Title
 287          */
 288         public function getRelevantTitle() {
 289                 if ( isset($this->mRelevantTitle) ) {
 290                         return $this->mRelevantTitle;
 291                 }
 292                 return $this->getTitle();
 293         }
 294
 295         /**
 296          * Set the "relevant" user
 297          * @see self::getRelevantUser()
 298          * @param $u User object to use
 299          */
 300         public function setRelevantUser( $u ) {
 301                 $this->mRelevantUser = $u;
 302         }
 303
 304         /**
 305          * Return the "relevant" user.
 306          * A "relevant" user is similar to a relevant title. Special pages like
 307          * Special:Contributions mark the user which they are relevant to so that
 308          * things like the toolbox can display the information they usually are only
 309          * able to display on a user's userpage and talkpage.
 310          * @return User
 311          */
 312         public function getRelevantUser() {
 313                 if ( isset($this->mRelevantUser) ) {
 314                         return $this->mRelevantUser;
 315                 }
 316                 $title = $this->getRelevantTitle();
 317                 if( $title->getNamespace() == NS_USER || $title->getNamespace() == NS_USER_TALK ) {
 318                         $rootUser = strtok( $title->getText(), '/' );
 319                         if ( User::isIP( $rootUser ) ) {
 320                                 $this->mRelevantUser = User::newFromName( $rootUser, false );
 321                         } else {
 322                                 $user = User::newFromName( $rootUser );
 323                                 if ( $user->isLoggedIn() ) {
 324                                         $this->mRelevantUser = $user;
 325                                 }
 326                         }
 327                         return $this->mRelevantUser;
 328                 }
 329                 return null;
 330         }
 331
 332         /**
 333          * Outputs the HTML generated by other functions.
 334          * @param $out OutputPage
 335          */
 336         abstract function outputPage( OutputPage $out );
 337
 338         static function makeVariablesScript( $data ) {
 339                 if ( $data ) {
 340                         return Html::inlineScript(
 341                                 ResourceLoader::makeLoaderConditionalScript( ResourceLoader::makeConfigSetScript( $data ) )
 342                         );
 343                 } else {
 344                         return '';
 345                 }
 346         }
 347
 348         /**
 349          * To make it harder for someone to slip a user a fake
 350          * user-JavaScript or user-CSS preview, a random token
 351          * is associated with the login session. If it's not
 352          * passed back with the preview request, we won't render
 353          * the code.
 354          *
 355          * @param $action String: 'edit', 'submit' etc.
 356          * @return bool
 357          */
 358         public function userCanPreview( $action ) {
 359                 if ( $action != 'submit' ) {
 360                         return false;
 361                 }
 362                 if ( !$this->getContext()->getRequest()->wasPosted() ) {
 363                         return false;
 364                 }
 365                 if ( !$this->getTitle()->userCanEditCssSubpage() ) {
 366                         return false;
 367                 }
 368                 if ( !$this->getTitle()->userCanEditJsSubpage() ) {
 369                         return false;
 370                 }
 371
 372                 return $this->getContext()->getUser()->matchEditToken(
 373                         $this->getContext()->getRequest()->getVal( 'wpEditToken' ) );
 374         }
 375
 376         /**
 377          * Generated JavaScript action=raw&gen=js
 378          * This used to load MediaWiki:Common.js and the skin-specific style
 379          * before the ResourceLoader.
 380          *
 381          * @deprecated since 1.18 Use the ResourceLoader instead. This may be removed at some
 382          * point.
 383          * @param $skinName String: If set, overrides the skin name
 384          * @return String
 385          */
 386         public function generateUserJs( $skinName = null ) {
 387                 return '';
 388         }
 389
 390         /**
 391          * Generate user stylesheet for action=raw&gen=css
 392          *
 393          * @deprecated since 1.18 Use the ResourceLoader instead. This may be removed at some
 394          * point.
 395          * @return String
 396          */
 397         public function generateUserStylesheet() {
 398                 return '';
 399         }
 400
 401         /**
 402          * @private
 403          * @todo document
 404          * @param $out OutputPage
 405          */
 406         function setupUserCss( OutputPage $out ) {
 407                 global $wgUseSiteCss, $wgAllowUserCss, $wgAllowUserCssPrefs;
 408
 409                 wfProfileIn( __METHOD__ );
 410
 411                 $this->setupSkinUserCss( $out );
 412                 // Add any extension CSS
 413                 foreach ( $out->getExtStyle() as $url ) {
 414                         $out->addStyle( $url );
 415                 }
 416
 417                 // Per-site custom styles
 418                 if ( $wgUseSiteCss ) {
 419                         $out->addModuleStyles( array( 'site', 'noscript' ) );
 420                         if( $this->getContext()->getUser()->isLoggedIn() ){
 421                                 $out->addModuleStyles( 'user.groups' );
 422                         }
 423                 }
 424
 425                 // Per-user custom styles
 426                 if ( $wgAllowUserCss ) {
 427                         if ( $this->getTitle()->isCssSubpage() && $this->userCanPreview( $this->getContext()->getRequest()->getVal( 'action' ) ) ) {
 428                                 // @todo FIXME: Properly escape the cdata!
 429                                 $out->addInlineStyle( $this->getContext()->getRequest()->getText( 'wpTextbox1' ) );
 430                         } else {
 431                                 $out->addModuleStyles( 'user' );
 432                         }
 433                 }
 434
 435                 // Per-user preference styles
 436                 if ( $wgAllowUserCssPrefs ) {
 437                         $out->addModuleStyles( 'user.options' );
 438                 }
 439
 440                 wfProfileOut( __METHOD__ );
 441         }
 442
 443         /**
 444          * Get the query to generate a dynamic stylesheet
 445          *
 446          * @return array
 447          */
 448         public static function getDynamicStylesheetQuery() {
 449                 global $wgSquidMaxage;
 450
 451                 return array(
 452                                 'action' => 'raw',
 453                                 'maxage' => $wgSquidMaxage,
 454                                 'usemsgcache' => 'yes',
 455                                 'ctype' => 'text/css',
 456                                 'smaxage' => $wgSquidMaxage,
 457                         );
 458         }
 459
 460         /**
 461          * Add skin specific stylesheets
 462          * Calling this method with an $out of anything but the same OutputPage
 463          * inside ->getContext()->getOutput() is deprecated. The $out arg is kept
 464          * for compatibility purposes with skins.
 465          * @param $out OutputPage
 466          * @delete
 467          */
 468         abstract function setupSkinUserCss( OutputPage $out );
 469
 470         /**
 471          * TODO: document
 472          * @param $title Title
 473          * @return String
 474          */
 475         function getPageClasses( $title ) {
 476                 $numeric = 'ns-' . $title->getNamespace();
 477
 478                 if ( $title->getNamespace() == NS_SPECIAL ) {
 479                         $type = 'ns-special';
 480                         // bug 23315: provide a class based on the canonical special page name without subpages
 481                         list( $canonicalName ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );
 482                         if ( $canonicalName ) {
 483                                 $type .= ' ' . Sanitizer::escapeClass( "mw-special-$canonicalName" );
 484                         } else {
 485                                 $type .= ' mw-invalidspecialpage';
 486                         }
 487                 } elseif ( $title->isTalkPage() ) {
 488                         $type = 'ns-talk';
 489                 } else {
 490                         $type = 'ns-subject';
 491                 }
 492
 493                 $name = Sanitizer::escapeClass( 'page-' . $title->getPrefixedText() );
 494
 495                 return "$numeric $type $name";
 496         }
 497
 498         /**
 499          * This will be called by OutputPage::headElement when it is creating the
 500          * <body> tag, skins can override it if they have a need to add in any
 501          * body attributes or classes of their own.
 502          * @param $out OutputPage
 503          * @param $bodyAttrs Array
 504          */
 505         function addToBodyAttributes( $out, &$bodyAttrs ) {
 506                 // does nothing by default
 507         }
 508
 509         /**
 510          * URL to the logo
 511          * @return String
 512          */
 513         function getLogo() {
 514                 global $wgLogo;
 515                 return $wgLogo;
 516         }
 517
 518         function getCategoryLinks() {
 519                 global $wgUseCategoryBrowser, $wgContLang;
 520
 521                 $out = $this->getContext()->getOutput();
 522
 523                 if ( count( $out->mCategoryLinks ) == 0 ) {
 524                         return '';
 525                 }
 526
 527                 # Separator
 528                 $sep = wfMsgExt( 'catseparator', array( 'parsemag', 'escapenoentities' ) );
 529
 530                 // Use Unicode bidi embedding override characters,
 531                 // to make sure links don't smash each other up in ugly ways.
 532                 $dir = $wgContLang->getDir();
 533                 $embed = "<span dir='$dir'>";
 534                 $pop = '</span>';
 535
 536                 $allCats = $out->getCategoryLinks();
 537                 $s = '';
 538                 $colon = wfMsgExt( 'colon-separator', 'escapenoentities' );
 539
 540                 if ( !empty( $allCats['normal'] ) ) {
 541                         $t = $embed . implode( "{$pop} {$sep} {$embed}" , $allCats['normal'] ) . $pop;
 542
 543                         $msg = wfMsgExt( 'pagecategories', array( 'parsemag', 'escapenoentities' ), count( $allCats['normal'] ) );
 544                         $s .= '<div id="mw-normal-catlinks">' .
 545                                 Linker::link( Title::newFromText( wfMsgForContent( 'pagecategorieslink' ) ), $msg )
 546                                 . $colon . $t . '</div>';
 547                 }
 548
 549                 # Hidden categories
 550                 if ( isset( $allCats['hidden'] ) ) {
 551                         if ( $this->getContext()->getUser()->getBoolOption( 'showhiddencats' ) ) {
 552                                 $class = 'mw-hidden-cats-user-shown';
 553                         } elseif ( $this->getTitle()->getNamespace() == NS_CATEGORY ) {
 554                                 $class = 'mw-hidden-cats-ns-shown';
 555                         } else {
 556                                 $class = 'mw-hidden-cats-hidden';
 557                         }
 558
 559                         $s .= "<div id=\"mw-hidden-catlinks\" class=\"$class\">" .
 560                                 wfMsgExt( 'hidden-categories', array( 'parsemag', 'escapenoentities' ), count( $allCats['hidden'] ) ) .
 561                                 $colon . $embed . implode( "$pop $sep $embed", $allCats['hidden'] ) . $pop .
 562                                 '</div>';
 563                 }
 564
 565                 # optional 'dmoz-like' category browser. Will be shown under the list
 566                 # of categories an article belong to
 567                 if ( $wgUseCategoryBrowser ) {
 568                         $s .= '<br /><hr />';
 569
 570                         # get a big array of the parents tree
 571                         $parenttree = $this->getTitle()->getParentCategoryTree();
 572                         # Skin object passed by reference cause it can not be
 573                         # accessed under the method subfunction drawCategoryBrowser
 574                         $tempout = explode( "\n", $this->drawCategoryBrowser( $parenttree ) );
 575                         # Clean out bogus first entry and sort them
 576                         unset( $tempout[0] );
 577                         asort( $tempout );
 578                         # Output one per line
 579                         $s .= implode( "<br />\n", $tempout );
 580                 }
 581
 582                 return $s;
 583         }
 584
 585         /**
 586          * Render the array as a serie of links.
 587          * @param $tree Array: categories tree returned by Title::getParentCategoryTree
 588          * @return String separated by &gt;, terminate with "\n"
 589          */
 590         function drawCategoryBrowser( $tree ) {
 591                 $return = '';
 592
 593                 foreach ( $tree as $element => $parent ) {
 594                         if ( empty( $parent ) ) {
 595                                 # element start a new list
 596                                 $return .= "\n";
 597                         } else {
 598                                 # grab the others elements
 599                                 $return .= $this->drawCategoryBrowser( $parent ) . ' &gt; ';
 600                         }
 601
 602                         # add our current element to the list
 603                         $eltitle = Title::newFromText( $element );
 604                         $return .=  Linker::link( $eltitle, $eltitle->getText() );
 605                 }
 606
 607                 return $return;
 608         }
 609
 610         function getCategories() {
 611                 $out = $this->getContext()->getOutput();
 612
 613                 $catlinks = $this->getCategoryLinks();
 614
 615                 $classes = 'catlinks';
 616
 617                 // Check what we're showing
 618                 $allCats = $out->getCategoryLinks();
 619                 $showHidden = $this->getContext()->getUser()->getBoolOption( 'showhiddencats' ) ||
 620                                                 $this->getTitle()->getNamespace() == NS_CATEGORY;
 621
 622                 if ( empty( $allCats['normal'] ) && !( !empty( $allCats['hidden'] ) && $showHidden ) ) {
 623                         $classes .= ' catlinks-allhidden';
 624                 }
 625
 626                 return "<div id='catlinks' class='$classes'>{$catlinks}</div>";
 627         }
 628
 629         /**
 630          * This runs a hook to allow extensions placing their stuff after content
 631          * and article metadata (e.g. categories).
 632          * Note: This function has nothing to do with afterContent().
 633          *
 634          * This hook is placed here in order to allow using the same hook for all
 635          * skins, both the SkinTemplate based ones and the older ones, which directly
 636          * use this class to get their data.
 637          *
 638          * The output of this function gets processed in SkinTemplate::outputPage() for
 639          * the SkinTemplate based skins, all other skins should directly echo it.
 640          *
 641          * @return String, empty by default, if not changed by any hook function.
 642          */
 643         protected function afterContentHook() {
 644                 $data = '';
 645
 646                 if ( wfRunHooks( 'SkinAfterContent', array( &$data, $this ) ) ) {
 647                         // adding just some spaces shouldn't toggle the output
 648                         // of the whole <div/>, so we use trim() here
 649                         if ( trim( $data ) != '' ) {
 650                                 // Doing this here instead of in the skins to
 651                                 // ensure that the div has the same ID in all
 652                                 // skins
 653                                 $data = "<div id='mw-data-after-content'>\n" .
 654                                         "\t$data\n" .
 655                                         "</div>\n";
 656                         }
 657                 } else {
 658                         wfDebug( "Hook SkinAfterContent changed output processing.\n" );
 659                 }
 660
 661                 return $data;
 662         }
 663
 664         /**
 665          * Generate debug data HTML for displaying at the bottom of the main content
 666          * area.
 667          * @return String HTML containing debug data, if enabled (otherwise empty).
 668          */
 669         protected function generateDebugHTML() {
 670                 global $wgShowDebug;
 671
 672                 if ( $wgShowDebug ) {
 673                         $listInternals = $this->formatDebugHTML( $this->getContext()->getOutput()->mDebugtext );
 674                         return "\n<hr />\n<strong>Debug data:</strong><ul id=\"mw-debug-html\">" .
 675                                 $listInternals . "</ul>\n";
 676                 }
 677
 678                 return '';
 679         }
 680
 681         private function formatDebugHTML( $debugText ) {
 682                 global $wgDebugTimestamps;
 683
 684                 $lines = explode( "\n", $debugText );
 685                 $curIdent = 0;
 686                 $ret = '<li>';
 687
 688                 foreach ( $lines as $line ) {
 689                         $pre = '';
 690                         if ( $wgDebugTimestamps ) {
 691                                 $matches = array();
 692                                 if ( preg_match( '/^(\d+\.\d+\s{2})/', $line, $matches ) ) {
 693                                         $pre = $matches[1];
 694                                         $line = substr( $line, strlen( $pre ) );
 695                                 }
 696                         }
 697                         $display = ltrim( $line );
 698                         $ident = strlen( $line ) - strlen( $display );
 699                         $diff = $ident - $curIdent;
 700
 701                         $display = $pre . $display;
 702                         if ( $display == '' ) {
 703                                 $display = "\xc2\xa0";
 704                         }
 705
 706                         if ( !$ident && $diff < 0 && substr( $display, 0, 9 ) != 'Entering ' && substr( $display, 0, 8 ) != 'Exiting ' ) {
 707                                 $ident = $curIdent;
 708                                 $diff = 0;
 709                                 $display = '<span style="background:yellow;">' . htmlspecialchars( $display ) . '</span>';
 710                         } else {
 711                                 $display = htmlspecialchars( $display );
 712                         }
 713
 714                         if ( $diff < 0 ) {
 715                                 $ret .= str_repeat( "</li></ul>\n", -$diff ) . "</li><li>\n";
 716                         } elseif ( $diff == 0 ) {
 717                                 $ret .= "</li><li>\n";
 718                         } else {
 719                                 $ret .= str_repeat( "<ul><li>\n", $diff );
 720                         }
 721                         $ret .= "<tt>$display</tt>\n";
 722
 723                         $curIdent = $ident;
 724                 }
 725
 726                 $ret .= str_repeat( '</li></ul>', $curIdent ) . '</li>';
 727
 728                 return $ret;
 729         }
 730
 731         /**
 732          * This gets called shortly before the </body> tag.
 733          * @param $out OutputPage object
 734          * @return String HTML-wrapped JS code to be put before </body>
 735          */
 736         function bottomScripts( $out ) {
 737                 // TODO and the suckage continues. This function is really just a wrapper around
 738                 // OutputPage::getBottomScripts() which takes a Skin param. This should be cleaned
 739                 // up at some point
 740                 $bottomScriptText = $out->getBottomScripts( $this );
 741                 wfRunHooks( 'SkinAfterBottomScripts', array( $this, &$bottomScriptText ) );
 742
 743                 return $bottomScriptText;
 744         }
 745
 746         /** @return string Retrievied from HTML text */
 747         function printSource() {
 748                 $url = htmlspecialchars( $this->getTitle()->getFullURL() );
 749                 return wfMsg( 'retrievedfrom', '<a href="' . $url . '">' . $url . '</a>' );
 750         }
 751
 752         function getUndeleteLink() {
 753                 $action = $this->getContext()->getRequest()->getVal( 'action', 'view' );
 754
 755                 if ( $this->getContext()->getUser()->isAllowed( 'deletedhistory' ) &&
 756                         ( $this->getTitle()->getArticleId() == 0 || $action == 'history' ) ) {
 757                         $n = $this->getTitle()->isDeleted();
 758
 759                         if ( $n ) {
 760                                 if ( $this->getContext()->getUser()->isAllowed( 'undelete' ) ) {
 761                                         $msg = 'thisisdeleted';
 762                                 } else {
 763                                         $msg = 'viewdeleted';
 764                                 }
 765
 766                                 return wfMsg(
 767                                         $msg,
 768                                         Linker::link(
 769                                                 SpecialPage::getTitleFor( 'Undelete', $this->getTitle()->getPrefixedDBkey() ),
 770                                                 wfMsgExt( 'restorelink', array( 'parsemag', 'escape' ), $this->getContext()->getLang()->formatNum( $n ) ),
 771                                                 array(),
 772                                                 array(),
 773                                                 array( 'known', 'noclasses' )
 774                                         )
 775                                 );
 776                         }
 777                 }
 778
 779                 return '';
 780         }
 781
 782         function subPageSubtitle() {
 783                 $out = $this->getContext()->getOutput();
 784                 $subpages = '';
 785
 786                 if ( !wfRunHooks( 'SkinSubPageSubtitle', array( &$subpages, $this, $out ) ) ) {
 787                         return $subpages;
 788                 }
 789
 790                 if ( $out->isArticle() && MWNamespace::hasSubpages( $out->getTitle()->getNamespace() ) ) {
 791                         $ptext = $this->getTitle()->getPrefixedText();
 792                         if ( preg_match( '/\//', $ptext ) ) {
 793                                 $links = explode( '/', $ptext );
 794                                 array_pop( $links );
 795                                 $c = 0;
 796                                 $growinglink = '';
 797                                 $display = '';
 798
 799                                 foreach ( $links as $link ) {
 800                                         $growinglink .= $link;
 801                                         $display .= $link;
 802                                         $linkObj = Title::newFromText( $growinglink );
 803
 804                                         if ( is_object( $linkObj ) && $linkObj->exists() ) {
 805                                                 $getlink = $this->link(
 806                                                         $linkObj,
 807                                                         htmlspecialchars( $display ),
 808                                                         array(),
 809                                                         array(),
 810                                                         array( 'known', 'noclasses' )
 811                                                 );
 812
 813                                                 $c++;
 814
 815                                                 if ( $c > 1 ) {
 816                                                         $subpages .= wfMsgExt( 'pipe-separator', 'escapenoentities' );
 817                                                 } else  {
 818                                                         $subpages .= '&lt; ';
 819                                                 }
 820
 821                                                 $subpages .= $getlink;
 822                                                 $display = '';
 823                                         } else {
 824                                                 $display .= '/';
 825                                         }
 826                                         $growinglink .= '/';
 827                                 }
 828                         }
 829                 }
 830
 831                 return $subpages;
 832         }
 833
 834         /**
 835          * Returns true if the IP should be shown in the header
 836          * @return Bool
 837          */
 838         function showIPinHeader() {
 839                 global $wgShowIPinHeader;
 840                 return $wgShowIPinHeader && session_id() != '';
 841         }
 842
 843         function getSearchLink() {
 844                 $searchPage = SpecialPage::getTitleFor( 'Search' );
 845                 return $searchPage->getLocalURL();
 846         }
 847
 848         function escapeSearchLink() {
 849                 return htmlspecialchars( $this->getSearchLink() );
 850         }
 851
 852         function getCopyright( $type = 'detect' ) {
 853                 global $wgRightsPage, $wgRightsUrl, $wgRightsText;
 854
 855                 if ( $type == 'detect' ) {
 856                         $diff = $this->getContext()->getRequest()->getVal( 'diff' );
 857
 858                         if ( is_null( $diff ) && !$this->isRevisionCurrent() && wfMsgForContent( 'history_copyright' ) !== '-' ) {
 859                                 $type = 'history';
 860                         } else {
 861                                 $type = 'normal';
 862                         }
 863                 }
 864
 865                 if ( $type == 'history' ) {
 866                         $msg = 'history_copyright';
 867                 } else {
 868                         $msg = 'copyright';
 869                 }
 870
 871                 $out = '';
 872
 873                 if ( $wgRightsPage ) {
 874                         $title = Title::newFromText( $wgRightsPage );
 875                         $link = Linker::linkKnown( $title, $wgRightsText );
 876                 } elseif ( $wgRightsUrl ) {
 877                         $link = Linker::makeExternalLink( $wgRightsUrl, $wgRightsText );
 878                 } elseif ( $wgRightsText ) {
 879                         $link = $wgRightsText;
 880                 } else {
 881                         # Give up now
 882                         return $out;
 883                 }
 884
 885                 // Allow for site and per-namespace customization of copyright notice.
 886                 $forContent = true;
 887
 888                 wfRunHooks( 'SkinCopyrightFooter', array( $this->getTitle(), $type, &$msg, &$link, &$forContent ) );
 889
 890                 if ( $forContent ) {
 891                         $out .= wfMsgForContent( $msg, $link );
 892                 } else {
 893                         $out .= wfMsg( $msg, $link );
 894                 }
 895
 896                 return $out;
 897         }
 898
 899         function getCopyrightIcon() {
 900                 global $wgRightsUrl, $wgRightsText, $wgRightsIcon, $wgCopyrightIcon;
 901
 902                 $out = '';
 903
 904                 if ( isset( $wgCopyrightIcon ) && $wgCopyrightIcon ) {
 905                         $out = $wgCopyrightIcon;
 906                 } elseif ( $wgRightsIcon ) {
 907                         $icon = htmlspecialchars( $wgRightsIcon );
 908
 909                         if ( $wgRightsUrl ) {
 910                                 $url = htmlspecialchars( $wgRightsUrl );
 911                                 $out .= '<a href="' . $url . '">';
 912                         }
 913
 914                         $text = htmlspecialchars( $wgRightsText );
 915                         $out .= "<img src=\"$icon\" alt=\"$text\" width=\"88\" height=\"31\" />";
 916
 917                         if ( $wgRightsUrl ) {
 918                                 $out .= '</a>';
 919                         }
 920                 }
 921
 922                 return $out;
 923         }
 924
 925         /**
 926          * Gets the powered by MediaWiki icon.
 927          * @return string
 928          */
 929         function getPoweredBy() {
 930                 global $wgStylePath;
 931
 932                 $url = htmlspecialchars( "$wgStylePath/common/images/poweredby_mediawiki_88x31.png" );
 933                 $text = '<a href="http://www.mediawiki.org/"><img src="' . $url . '" height="31" width="88" alt="Powered by MediaWiki" /></a>';
 934                 wfRunHooks( 'SkinGetPoweredBy', array( &$text, $this ) );
 935                 return $text;
 936         }
 937
 938         /**
 939          * Get the timestamp of the latest revision, formatted in user language
 940          *
 941          * @param $article Article object. Used if we're working with the current revision
 942          * @return String
 943          */
 944         protected function lastModified( $article ) {
 945                 if ( !$this->isRevisionCurrent() ) {
 946                         $timestamp = Revision::getTimestampFromId( $this->getTitle(), $this->getRevisionId() );
 947                 } else {
 948                         $timestamp = $article->getTimestamp();
 949                 }
 950
 951                 if ( $timestamp ) {
 952                         $d = $this->getContext()->getLang()->date( $timestamp, true );
 953                         $t = $this->getContext()->getLang()->time( $timestamp, true );
 954                         $s = ' ' . wfMsg( 'lastmodifiedat', $d, $t );
 955                 } else {
 956                         $s = '';
 957                 }
 958
 959                 if ( wfGetLB()->getLaggedSlaveMode() ) {
 960                         $s .= ' <strong>' . wfMsg( 'laggedslavemode' ) . '</strong>';
 961                 }
 962
 963                 return $s;
 964         }
 965
 966         function logoText( $align = '' ) {
 967                 if ( $align != '' ) {
 968                         $a = " align='{$align}'";
 969                 } else {
 970                         $a = '';
 971                 }
 972
 973                 $mp = wfMsg( 'mainpage' );
 974                 $mptitle = Title::newMainPage();
 975                 $url = ( is_object( $mptitle ) ? $mptitle->escapeLocalURL() : '' );
 976
 977                 $logourl = $this->getLogo();
 978                 $s = "<a href='{$url}'><img{$a} src='{$logourl}' alt='[{$mp}]' /></a>";
 979
 980                 return $s;
 981         }
 982
 983         /**
 984          * Renders a $wgFooterIcons icon acording to the method's arguments
 985          * @param $icon Array: The icon to build the html for, see $wgFooterIcons for the format of this array
 986          * @param $withImage Bool|String: Whether to use the icon's image or output a text-only footericon
 987          * @return String HTML
 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          * @return String HTML
1044          */
1045         function privacyLink() {
1046                 return $this->footerLink( 'privacy', 'privacypage' );
1047         }
1048
1049         /**
1050          * Gets the link to the wiki's about page.
1051          * @return String HTML
1052          */
1053         function aboutLink() {
1054                 return $this->footerLink( 'aboutsite', 'aboutpage' );
1055         }
1056
1057         /**
1058          * Gets the link to the wiki's general disclaimers page.
1059          * @return String HTML
1060          */
1061         function disclaimerLink() {
1062                 return $this->footerLink( 'disclaimers', 'disclaimerpage' );
1063         }
1064
1065         /**
1066          * Return URL options for the 'edit page' link.
1067          * This may include an 'oldid' specifier, if the current page view is such.
1068          *
1069          * @return array
1070          * @private
1071          */
1072         function editUrlOptions() {
1073                 $options = array( 'action' => 'edit' );
1074
1075                 if ( !$this->isRevisionCurrent() ) {
1076                         $options['oldid'] = intval( $this->getRevisionId() );
1077                 }
1078
1079                 return $options;
1080         }
1081
1082         function showEmailUser( $id ) {
1083                 $targetUser = User::newFromId( $id );
1084                 return $this->getContext()->getUser()->canSendEmail() && # the sending user must have a confirmed email address
1085                         $targetUser->canReceiveEmail(); # the target user must have a confirmed email address and allow emails from users
1086         }
1087
1088         /**
1089          * Return a fully resolved style path url to images or styles stored in the common 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 getCommonStylePath( $name ) {
1096                 global $wgStylePath, $wgStyleVersion;
1097                 return "$wgStylePath/common/$name?$wgStyleVersion";
1098         }
1099
1100         /**
1101          * Return a fully resolved style path url to images or styles stored in the curent skins's folder.
1102          * This method returns a url resolved using the configured skin style path
1103          * and includes the style version inside of the url.
1104          * @param $name String: The name or path of a skin resource file
1105          * @return String The fully resolved style path url including styleversion
1106          */
1107         function getSkinStylePath( $name ) {
1108                 global $wgStylePath, $wgStyleVersion;
1109                 return "$wgStylePath/{$this->stylename}/$name?$wgStyleVersion";
1110         }
1111
1112         /* these are used extensively in SkinTemplate, but also some other places */
1113         static function makeMainPageUrl( $urlaction = '' ) {
1114                 $title = Title::newMainPage();
1115                 self::checkTitle( $title, '' );
1116
1117                 return $title->getLocalURL( $urlaction );
1118         }
1119
1120         static function makeSpecialUrl( $name, $urlaction = '' ) {
1121                 $title = SpecialPage::getSafeTitleFor( $name );
1122                 return $title->getLocalURL( $urlaction );
1123         }
1124
1125         static function makeSpecialUrlSubpage( $name, $subpage, $urlaction = '' ) {
1126                 $title = SpecialPage::getSafeTitleFor( $name, $subpage );
1127                 return $title->getLocalURL( $urlaction );
1128         }
1129
1130         static function makeI18nUrl( $name, $urlaction = '' ) {
1131                 $title = Title::newFromText( wfMsgForContent( $name ) );
1132                 self::checkTitle( $title, $name );
1133                 return $title->getLocalURL( $urlaction );
1134         }
1135
1136         static function makeUrl( $name, $urlaction = '' ) {
1137                 $title = Title::newFromText( $name );
1138                 self::checkTitle( $title, $name );
1139
1140                 return $title->getLocalURL( $urlaction );
1141         }
1142
1143         /**
1144          * If url string starts with http, consider as external URL, else
1145          * internal
1146          * @param $name String
1147          * @return String URL
1148          */
1149         static function makeInternalOrExternalUrl( $name ) {
1150                 if ( preg_match( '/^(?:' . wfUrlProtocols() . ')/', $name ) ) {
1151                         return $name;
1152                 } else {
1153                         return self::makeUrl( $name );
1154                 }
1155         }
1156
1157         # this can be passed the NS number as defined in Language.php
1158         static function makeNSUrl( $name, $urlaction = '', $namespace = NS_MAIN ) {
1159                 $title = Title::makeTitleSafe( $namespace, $name );
1160                 self::checkTitle( $title, $name );
1161
1162                 return $title->getLocalURL( $urlaction );
1163         }
1164
1165         /* these return an array with the 'href' and boolean 'exists' */
1166         static function makeUrlDetails( $name, $urlaction = '' ) {
1167                 $title = Title::newFromText( $name );
1168                 self::checkTitle( $title, $name );
1169
1170                 return array(
1171                         'href' => $title->getLocalURL( $urlaction ),
1172                         'exists' => $title->getArticleID() != 0,
1173                 );
1174         }
1175
1176         /**
1177          * Make URL details where the article exists (or at least it's convenient to think so)
1178          * @param $name String Article name
1179          * @param $urlaction String
1180          * @return Array
1181          */
1182         static function makeKnownUrlDetails( $name, $urlaction = '' ) {
1183                 $title = Title::newFromText( $name );
1184                 self::checkTitle( $title, $name );
1185
1186                 return array(
1187                         'href' => $title->getLocalURL( $urlaction ),
1188                         'exists' => true
1189                 );
1190         }
1191
1192         # make sure we have some title to operate on
1193         static function checkTitle( &$title, $name ) {
1194                 if ( !is_object( $title ) ) {
1195                         $title = Title::newFromText( $name );
1196                         if ( !is_object( $title ) ) {
1197                                 $title = Title::newFromText( '--error: link target missing--' );
1198                         }
1199                 }
1200         }
1201
1202         /**
1203          * Build an array that represents the sidebar(s), the navigation bar among them
1204          *
1205          * @return array
1206          */
1207         function buildSidebar() {
1208                 global $parserMemc, $wgEnableSidebarCache, $wgSidebarCacheExpiry;
1209                 wfProfileIn( __METHOD__ );
1210
1211                 $key = wfMemcKey( 'sidebar', $this->getContext()->getLang()->getCode() );
1212
1213                 if ( $wgEnableSidebarCache ) {
1214                         $cachedsidebar = $parserMemc->get( $key );
1215                         if ( $cachedsidebar ) {
1216                                 wfProfileOut( __METHOD__ );
1217                                 return $cachedsidebar;
1218                         }
1219                 }
1220
1221                 $bar = array();
1222                 $this->addToSidebar( $bar, 'sidebar' );
1223
1224                 wfRunHooks( 'SkinBuildSidebar', array( $this, &$bar ) );
1225                 if ( $wgEnableSidebarCache ) {
1226                         $parserMemc->set( $key, $bar, $wgSidebarCacheExpiry );
1227                 }
1228
1229                 wfProfileOut( __METHOD__ );
1230                 return $bar;
1231         }
1232         /**
1233          * Add content from a sidebar system message
1234          * Currently only used for MediaWiki:Sidebar (but may be used by Extensions)
1235          *
1236          * This is just a wrapper around addToSidebarPlain() for backwards compatibility
1237          *
1238          * @param &$bar array
1239          * @param $message String
1240          */
1241         function addToSidebar( &$bar, $message ) {
1242                 $this->addToSidebarPlain( $bar, wfMsgForContentNoTrans( $message ) );
1243         }
1244
1245         /**
1246          * Add content from plain text
1247          * @since 1.17
1248          * @param &$bar array
1249          * @param $text string
1250          * @return Array
1251          */
1252         function addToSidebarPlain( &$bar, $text ) {
1253                 $lines = explode( "\n", $text );
1254                 $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.
1255
1256                 $heading = '';
1257
1258                 foreach ( $lines as $line ) {
1259                         if ( strpos( $line, '*' ) !== 0 ) {
1260                                 continue;
1261                         }
1262
1263                         if ( strpos( $line, '**' ) !== 0 ) {
1264                                 $heading = trim( $line, '* ' );
1265                                 if ( !array_key_exists( $heading, $bar ) ) {
1266                                         $bar[$heading] = array();
1267                                 }
1268                         } else {
1269                                 $line = trim( $line, '* ' );
1270
1271                                 if ( strpos( $line, '|' ) !== false ) { // sanity check
1272                                         $line = MessageCache::singleton()->transform( $line, false, null, $this->getTitle() );
1273                                         $line = array_map( 'trim', explode( '|', $line, 2 ) );
1274                                         $extraAttribs = array();
1275
1276                                         $msgLink = wfMessage( $line[0] )->inContentLanguage();
1277                                         if ( $msgLink->exists() ) {
1278                                                 $link = $msgLink->text();
1279                                                 if ( $link == '-' ) {
1280                                                         continue;
1281                                                 }
1282                                         } else {
1283                                                 $link = $line[0];
1284                                         }
1285
1286                                         $msgText = wfMessage( $line[1] );
1287                                         if ( $msgText->exists() ) {
1288                                                 $text = $msgText->text();
1289                                         } else {
1290                                                 $text = $line[1];
1291                                         }
1292
1293                                         if ( preg_match( '/^(?:' . wfUrlProtocols() . ')/', $link ) ) {
1294                                                 $href = $link;
1295                                                 //Parser::getExternalLinkAttribs won't work here because of the Namespace things
1296                                                 global $wgNoFollowLinks;
1297                                                 if ( $wgNoFollowLinks ) {
1298                                                         $extraAttribs['rel'] = 'nofollow';
1299
1300                                                         global $wgNoFollowDomainExceptions;
1301                                                         if ( $wgNoFollowDomainExceptions ) {
1302                                                                 $bits = wfParseUrl( $url );
1303                                                                 if ( is_array( $bits ) && isset( $bits['host'] ) ) {
1304                                                                         foreach ( $wgNoFollowDomainExceptions as $domain ) {
1305                                                                                 if ( substr( $bits['host'], -strlen( $domain ) ) == $domain ) {
1306                                                                                         unset( $extraAttribs['rel'] );
1307                                                                                         break;
1308                                                                                 }
1309                                                                         }
1310                                                                 }
1311                                                         }
1312                                                 }
1313                                                 global $wgExternalLinkTarget;
1314                                                 if ( $wgExternalLinkTarget) {
1315                                                         $extraAttribs['target'] = $wgExternalLinkTarget;
1316                                                 }
1317                                         } else {
1318                                                 $title = Title::newFromText( $link );
1319
1320                                                 if ( $title ) {
1321                                                         $title = $title->fixSpecialName();
1322                                                         $href = $title->getLocalURL();
1323                                                 } else {
1324                                                         $href = 'INVALID-TITLE';
1325                                                 }
1326                                         }
1327
1328                                         $bar[$heading][] = array_merge( array(
1329                                                 'text' => $text,
1330                                                 'href' => $href,
1331                                                 'id' => 'n-' . strtr( $line[1], ' ', '-' ),
1332                                                 'active' => false
1333                                         ), $extraAttribs );
1334                                 } elseif ( ( substr( $line, 0, 2 ) == '{{' ) && ( substr( $line, -2 ) == '}}' ) ) {
1335                                         global $wgParser;
1336
1337                                         $line = substr( $line, 2, strlen( $line ) - 4 );
1338
1339                                         $options = new ParserOptions();
1340                                         $options->setEditSection( false );
1341                                         $options->setInterfaceMessage( true );
1342                                         $wikiBar[$heading] = $wgParser->parse( wfMsgForContentNoTrans( $line ) , $this->getTitle(), $options )->getText();
1343                                 } else {
1344                                         continue;
1345                                 }
1346                         }
1347                 }
1348
1349                 if ( count( $wikiBar ) > 0 ) {
1350                         $bar = array_merge( $bar, $wikiBar );
1351                 }
1352
1353                 return $bar;
1354         }
1355
1356         /**
1357          * Should we include common/wikiprintable.css?  Skins that have their own
1358          * print stylesheet should override this and return false.  (This is an
1359          * ugly hack to get Monobook to play nicely with
1360          * OutputPage::headElement().)
1361          *
1362          * @return bool
1363          */
1364         public function commonPrintStylesheet() {
1365                 return true;
1366         }
1367
1368         /**
1369          * Gets new talk page messages for the current user.
1370          * @return MediaWiki message or if no new talk page messages, nothing
1371          */
1372         function getNewtalks() {
1373                 $out = $this->getContext()->getOutput();
1374
1375                 $newtalks = $this->getContext()->getUser()->getNewMessageLinks();
1376                 $ntl = '';
1377
1378                 if ( count( $newtalks ) == 1 && $newtalks[0]['wiki'] === wfWikiID() ) {
1379                         $userTitle = $this->getUser()->getUserPage();
1380                         $userTalkTitle = $userTitle->getTalkPage();
1381
1382                         if ( !$userTalkTitle->equals( $out->getTitle() ) ) {
1383                                 $newMessagesLink = $this->link(
1384                                         $userTalkTitle,
1385                                         wfMsgHtml( 'newmessageslink' ),
1386                                         array(),
1387                                         array( 'redirect' => 'no' ),
1388                                         array( 'known', 'noclasses' )
1389                                 );
1390
1391                                 $newMessagesDiffLink = $this->link(
1392                                         $userTalkTitle,
1393                                         wfMsgHtml( 'newmessagesdifflink' ),
1394                                         array(),
1395                                         array( 'diff' => 'cur' ),
1396                                         array( 'known', 'noclasses' )
1397                                 );
1398
1399                                 $ntl = wfMsg(
1400                                         'youhavenewmessages',
1401                                         $newMessagesLink,
1402                                         $newMessagesDiffLink
1403                                 );
1404                                 # Disable Squid cache
1405                                 $out->setSquidMaxage( 0 );
1406                         }
1407                 } elseif ( count( $newtalks ) ) {
1408                         // _>" " for BC <= 1.16
1409                         $sep = str_replace( '_', ' ', wfMsgHtml( 'newtalkseparator' ) );
1410                         $msgs = array();
1411
1412                         foreach ( $newtalks as $newtalk ) {
1413                                 $msgs[] = Xml::element(
1414                                         'a',
1415                                         array( 'href' => $newtalk['link'] ), $newtalk['wiki']
1416                                 );
1417                         }
1418                         $parts = implode( $sep, $msgs );
1419                         $ntl = wfMsgHtml( 'youhavenewmessagesmulti', $parts );
1420                         $out->setSquidMaxage( 0 );
1421                 }
1422
1423                 return $ntl;
1424         }
1425
1426         /**
1427          * Get a cached notice
1428          *
1429          * @param $name String: message name, or 'default' for $wgSiteNotice
1430          * @return String: HTML fragment
1431          */
1432         private function getCachedNotice( $name ) {
1433                 global $wgRenderHashAppend, $parserMemc;
1434
1435                 wfProfileIn( __METHOD__ );
1436
1437                 $needParse = false;
1438
1439                 if( $name === 'default' ) {
1440                         // special case
1441                         global $wgSiteNotice;
1442                         $notice = $wgSiteNotice;
1443                         if( empty( $notice ) ) {
1444                                 wfProfileOut( __METHOD__ );
1445                                 return false;
1446                         }
1447                 } else {
1448                         $msg = wfMessage( $name )->inContentLanguage();
1449                         if( $msg->isDisabled() ) {
1450                                 wfProfileOut( __METHOD__ );
1451                                 return false;
1452                         }
1453                         $notice = $msg->plain();
1454                 }
1455
1456                 // Use the extra hash appender to let eg SSL variants separately cache.
1457                 $key = wfMemcKey( $name . $wgRenderHashAppend );
1458                 $cachedNotice = $parserMemc->get( $key );
1459                 if( is_array( $cachedNotice ) ) {
1460                         if( md5( $notice ) == $cachedNotice['hash'] ) {
1461                                 $notice = $cachedNotice['html'];
1462                         } else {
1463                                 $needParse = true;
1464                         }
1465                 } else {
1466                         $needParse = true;
1467                 }
1468
1469                 if ( $needParse ) {
1470                         $parsed = $this->getContext()->getOutput()->parse( $notice );
1471                         $parserMemc->set( $key, array( 'html' => $parsed, 'hash' => md5( $notice ) ), 600 );
1472                         $notice = $parsed;
1473                 }
1474
1475                 $notice = '<div id="localNotice">' .$notice . '</div>';
1476                 wfProfileOut( __METHOD__ );
1477                 return $notice;
1478         }
1479
1480         /**
1481          * Get a notice based on page's namespace
1482          *
1483          * @return String: HTML fragment
1484          */
1485         function getNamespaceNotice() {
1486                 wfProfileIn( __METHOD__ );
1487
1488                 $key = 'namespacenotice-' . $this->getTitle()->getNsText();
1489                 $namespaceNotice = $this->getCachedNotice( $key );
1490                 if ( $namespaceNotice && substr( $namespaceNotice, 0, 7 ) != '<p>&lt;' ) {
1491                         $namespaceNotice = '<div id="namespacebanner">' . $namespaceNotice . '</div>';
1492                 } else {
1493                         $namespaceNotice = '';
1494                 }
1495
1496                 wfProfileOut( __METHOD__ );
1497                 return $namespaceNotice;
1498         }
1499
1500         /**
1501          * Get the site notice
1502          *
1503          * @return String: HTML fragment
1504          */
1505         function getSiteNotice() {
1506                 wfProfileIn( __METHOD__ );
1507                 $siteNotice = '';
1508
1509                 if ( wfRunHooks( 'SiteNoticeBefore', array( &$siteNotice, $this ) ) ) {
1510                         if ( is_object( $this->getContext()->getUser() ) && $this->getContext()->getUser()->isLoggedIn() ) {
1511                                 $siteNotice = $this->getCachedNotice( 'sitenotice' );
1512                         } else {
1513                                 $anonNotice = $this->getCachedNotice( 'anonnotice' );
1514                                 if ( !$anonNotice ) {
1515                                         $siteNotice = $this->getCachedNotice( 'sitenotice' );
1516                                 } else {
1517                                         $siteNotice = $anonNotice;
1518                                 }
1519                         }
1520                         if ( !$siteNotice ) {
1521                                 $siteNotice = $this->getCachedNotice( 'default' );
1522                         }
1523                 }
1524
1525                 wfRunHooks( 'SiteNoticeAfter', array( &$siteNotice, $this ) );
1526                 wfProfileOut( __METHOD__ );
1527                 return $siteNotice;
1528         }
1529
1530         /**
1531          * Create a section edit link.  This supersedes editSectionLink() and
1532          * editSectionLinkForOther().
1533          *
1534          * @param $nt      Title  The title being linked to (may not be the same as
1535          *   $wgTitle, if the section is included from a template)
1536          * @param $section string The designation of the section being pointed to,
1537          *   to be included in the link, like "&section=$section"
1538          * @param $tooltip string The tooltip to use for the link: will be escaped
1539          *   and wrapped in the 'editsectionhint' message
1540          * @param $lang    string Language code
1541          * @return         string HTML to use for edit link
1542          */
1543         public function doEditSectionLink( Title $nt, $section, $tooltip = null, $lang = false ) {
1544                 // HTML generated here should probably have userlangattributes
1545                 // added to it for LTR text on RTL pages
1546                 $attribs = array();
1547                 if ( !is_null( $tooltip ) ) {
1548                         # Bug 25462: undo double-escaping.
1549                         $tooltip = Sanitizer::decodeCharReferences( $tooltip );
1550                         $attribs['title'] = wfMsgExt( 'editsectionhint', array( 'language' => $lang, 'parsemag' ), $tooltip );
1551                 }
1552                 $link = Linker::link( $nt, wfMsgExt( 'editsection', array( 'language' => $lang ) ),
1553                         $attribs,
1554                         array( 'action' => 'edit', 'section' => $section ),
1555                         array( 'noclasses', 'known' )
1556                 );
1557
1558                 # Run the old hook.  This takes up half of the function . . . hopefully
1559                 # we can rid of it someday.
1560                 $attribs = '';
1561                 if ( $tooltip ) {
1562                         $attribs = wfMsgExt( 'editsectionhint', array( 'language' => $lang, 'parsemag', 'escape' ), $tooltip );
1563                         $attribs = " title=\"$attribs\"";
1564                 }
1565                 $result = null;
1566                 wfRunHooks( 'EditSectionLink', array( &$this, $nt, $section, $attribs, $link, &$result, $lang ) );
1567                 if ( !is_null( $result ) ) {
1568                         # For reverse compatibility, add the brackets *after* the hook is
1569                         # run, and even add them to hook-provided text.  (This is the main
1570                         # reason that the EditSectionLink hook is deprecated in favor of
1571                         # DoEditSectionLink: it can't change the brackets or the span.)
1572                         $result = wfMsgExt( 'editsection-brackets', array( 'escape', 'replaceafter', 'language' => $lang ), $result );
1573                         return "<span class=\"editsection\">$result</span>";
1574                 }
1575
1576                 # Add the brackets and the span, and *then* run the nice new hook, with
1577                 # clean and non-redundant arguments.
1578                 $result = wfMsgExt( 'editsection-brackets', array( 'escape', 'replaceafter', 'language' => $lang ), $link );
1579                 $result = "<span class=\"editsection\">$result</span>";
1580
1581                 wfRunHooks( 'DoEditSectionLink', array( $this, $nt, $section, $tooltip, &$result, $lang ) );
1582                 return $result;
1583         }
1584
1585         /**
1586          * Use PHP's magic __call handler to intercept legacy calls to the linker
1587          * for backwards compatibility.
1588          *
1589          * @param $fname String Name of called method
1590          * @param $args Array Arguments to the method
1591          */
1592         function __call( $fname, $args ) {
1593                 $realFunction = array( 'Linker', $fname );
1594                 if ( is_callable( $realFunction ) ) {
1595                         return call_user_func_array( $realFunction, $args );
1596                 } else {
1597                         $className = get_class( $this );
1598                         throw new MWException( "Call to undefined method $className::$fname" );
1599                 }
1600         }
1601
1602 }