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         /**#@+
  20          * @private
  21          */
  22         var $mWatchLinkNum = 0; // Appended to end of watch link id's
  23         /**#@-*/
  24         protected $mRevisionId; // The revision ID we're looking at, null if not applicable.
  25         protected $skinname = 'standard';
  26         protected $mRelevantTitle = null;
  27         protected $mRelevantUser = null;
  28
  29         /**
  30          * Fetch the set of available skins.
  31          * @return array of strings
  32          */
  33         static function getSkinNames() {
  34                 global $wgValidSkinNames;
  35                 static $skinsInitialised = false;
  36
  37                 if ( !$skinsInitialised || !count( $wgValidSkinNames ) ) {
  38                         # Get a list of available skins
  39                         # Build using the regular expression '^(.*).php$'
  40                         # Array keys are all lower case, array value keep the case used by filename
  41                         #
  42                         wfProfileIn( __METHOD__ . '-init' );
  43
  44                         global $wgStyleDirectory;
  45
  46                         $skinDir = dir( $wgStyleDirectory );
  47
  48                         # while code from www.php.net
  49                         while ( false !== ( $file = $skinDir->read() ) ) {
  50                                 // Skip non-PHP files, hidden files, and '.dep' includes
  51                                 $matches = array();
  52
  53                                 if ( preg_match( '/^([^.]*)\.php$/', $file, $matches ) ) {
  54                                         $aSkin = $matches[1];
  55                                         $wgValidSkinNames[strtolower( $aSkin )] = $aSkin;
  56                                 }
  57                         }
  58                         $skinDir->close();
  59                         $skinsInitialised = true;
  60                         wfProfileOut( __METHOD__ . '-init' );
  61                 }
  62                 return $wgValidSkinNames;
  63         }
  64
  65         /**
  66          * Fetch the list of usable skins in regards to $wgSkipSkins.
  67          * Useful for Special:Preferences and other places where you
  68          * only want to show skins users _can_ use.
  69          * @return array of strings
  70          */
  71         public static function getUsableSkins() {
  72                 global $wgSkipSkins;
  73
  74                 $usableSkins = self::getSkinNames();
  75
  76                 foreach ( $wgSkipSkins as $skip ) {
  77                         unset( $usableSkins[$skip] );
  78                 }
  79
  80                 return $usableSkins;
  81         }
  82
  83         /**
  84          * Normalize a skin preference value to a form that can be loaded.
  85          * If a skin can't be found, it will fall back to the configured
  86          * default (or the old 'Classic' skin if that's broken).
  87          * @param $key String: 'monobook', 'standard', etc.
  88          * @return string
  89          */
  90         static function normalizeKey( $key ) {
  91                 global $wgDefaultSkin;
  92
  93                 $skinNames = Skin::getSkinNames();
  94
  95                 if ( $key == '' ) {
  96                         // Don't return the default immediately;
  97                         // in a misconfiguration we need to fall back.
  98                         $key = $wgDefaultSkin;
  99                 }
 100
 101                 if ( isset( $skinNames[$key] ) ) {
 102                         return $key;
 103                 }
 104
 105                 // Older versions of the software used a numeric setting
 106                 // in the user preferences.
 107                 $fallback = array(
 108                         0 => $wgDefaultSkin,
 109                         1 => 'nostalgia',
 110                         2 => 'cologneblue'
 111                 );
 112
 113                 if ( isset( $fallback[$key] ) ) {
 114                         $key = $fallback[$key];
 115                 }
 116
 117                 if ( isset( $skinNames[$key] ) ) {
 118                         return $key;
 119                 } else if ( isset( $skinNames[$wgDefaultSkin] ) ) {
 120                         return $wgDefaultSkin;
 121                 } else {
 122                         return 'vector';
 123                 }
 124         }
 125
 126         /**
 127          * Factory method for loading a skin of a given type
 128          * @param $key String: 'monobook', 'standard', etc.
 129          * @return Skin
 130          */
 131         static function &newFromKey( $key ) {
 132                 global $wgStyleDirectory;
 133
 134                 $key = Skin::normalizeKey( $key );
 135
 136                 $skinNames = Skin::getSkinNames();
 137                 $skinName = $skinNames[$key];
 138                 $className = "Skin{$skinName}";
 139
 140                 # Grab the skin class and initialise it.
 141                 if ( !class_exists( $className ) ) {
 142                         // Preload base classes to work around APC/PHP5 bug
 143                         $deps = "{$wgStyleDirectory}/{$skinName}.deps.php";
 144
 145                         if ( file_exists( $deps ) ) {
 146                                 include_once( $deps );
 147                         }
 148                         require_once( "{$wgStyleDirectory}/{$skinName}.php" );
 149
 150                         # Check if we got if not failback to default skin
 151                         if ( !class_exists( $className ) ) {
 152                                 # DO NOT die if the class isn't found. This breaks maintenance
 153                                 # scripts and can cause a user account to be unrecoverable
 154                                 # except by SQL manipulation if a previously valid skin name
 155                                 # is no longer valid.
 156                                 wfDebug( "Skin class does not exist: $className\n" );
 157                                 $className = 'SkinVector';
 158                                 require_once( "{$wgStyleDirectory}/Vector.php" );
 159                         }
 160                 }
 161                 $skin = new $className;
 162                 return $skin;
 163         }
 164
 165         /** @return string path to the skin stylesheet */
 166         function getStylesheet() {
 167                 return 'common/wikistandard.css';
 168         }
 169
 170         /** @return string skin name */
 171         public function getSkinName() {
 172                 return $this->skinname;
 173         }
 174
 175         function initPage( OutputPage $out ) {
 176                 wfProfileIn( __METHOD__ );
 177
 178                 $this->mRevisionId = $out->mRevisionId;
 179                 $this->preloadExistence();
 180                 $this->setMembers();
 181
 182                 wfProfileOut( __METHOD__ );
 183         }
 184
 185         /**
 186          * Preload the existence of three commonly-requested pages in a single query
 187          */
 188         function preloadExistence() {
 189                 $user = $this->getContext()->getUser();
 190
 191                 // User/talk link
 192                 $titles = array( $user->getUserPage(), $user->getTalkPage() );
 193
 194                 // Other tab link
 195                 if ( $this->getTitle()->getNamespace() == NS_SPECIAL ) {
 196                         // nothing
 197                 } elseif ( $this->getTitle()->isTalkPage() ) {
 198                         $titles[] = $this->getTitle()->getSubjectPage();
 199                 } else {
 200                         $titles[] = $this->getTitle()->getTalkPage();
 201                 }
 202
 203                 $lb = new LinkBatch( $titles );
 204                 $lb->setCaller( __METHOD__ );
 205                 $lb->execute();
 206         }
 207
 208         /**
 209          * Set some local variables
 210          */
 211         protected function setMembers() {
 212                 $this->userpage = $this->getContext()->getUser()->getUserPage()->getPrefixedText();
 213                 $this->usercss = false;
 214         }
 215
 216         /**
 217          * Whether the revision displayed is the latest revision of the page
 218          *
 219          * @return Boolean
 220          */
 221         public function isRevisionCurrent() {
 222                 return $this->mRevisionId == 0 || $this->mRevisionId == $this->getTitle()->getLatestRevID();
 223         }
 224
 225         /**
 226          * Set the RequestContext used in this instance
 227          *
 228          * @param RequestContext $context
 229          */
 230         public function setContext( RequestContext $context ) {
 231                 $this->mContext = $context;
 232         }
 233
 234         /**
 235          * Get the RequestContext used in this instance
 236          *
 237          * @return RequestContext
 238          */
 239         public function getContext() {
 240                 if ( !isset($this->mContext) ) {
 241                         wfDebug( __METHOD__ . " called and \$mContext is null. Using RequestContext::getMain(); for sanity\n" );
 242                         $this->mContext = RequestContext::getMain();
 243                 }
 244                 return $this->mContext;
 245         }
 246
 247         /** Get the title
 248          *
 249          * @return Title
 250          */
 251         public function getTitle() {
 252                 return $this->getContext()->getTitle();
 253         }
 254
 255         /**
 256          * Set the "relevant" title
 257          * @see self::getRelevantTitle()
 258          * @param $t Title object to use
 259          */
 260         public function setRelevantTitle( $t ) {
 261                 $this->mRelevantTitle = $t;
 262         }
 263
 264         /**
 265          * Return the "relevant" title.
 266          * A "relevant" title is not necessarily the actual title of the page.
 267          * Special pages like Special:MovePage use set the page they are acting on
 268          * as their "relevant" title, this allows the skin system to display things
 269          * such as content tabs which belong to to that page instead of displaying
 270          * a basic special page tab which has almost no meaning.
 271          */
 272         public function getRelevantTitle() {
 273                 if ( isset($this->mRelevantTitle) ) {
 274                         return $this->mRelevantTitle;
 275                 }
 276                 return $this->getTitle();
 277         }
 278
 279         /**
 280          * Set the "relevant" user
 281          * @see self::getRelevantUser()
 282          * @param $u User object to use
 283          */
 284         public function setRelevantUser( $u ) {
 285                 $this->mRelevantUser = $u;
 286         }
 287
 288         /**
 289          * Return the "relevant" user.
 290          * A "relevant" user is similar to a relevant title. Special pages like
 291          * Special:Contributions mark the user which they are relevant to so that
 292          * things like the toolbox can display the information they usually are only
 293          * able to display on a user's userpage and talkpage.
 294          */
 295         public function getRelevantUser() {
 296                 if ( isset($this->mRelevantUser) ) {
 297                         return $this->mRelevantUser;
 298                 }
 299                 $title = $this->getRelevantTitle();
 300                 if( $title->getNamespace() == NS_USER || $title->getNamespace() == NS_USER_TALK ) {
 301                         $rootUser = strtok( $title->getText(), '/' );
 302                         if ( User::isIP( $rootUser ) ) {
 303                                 $this->mRelevantUser = User::newFromName( $rootUser, false );
 304                         } else {
 305                                 $user = User::newFromName( $rootUser );
 306                                 if ( $user->isLoggedIn() ) {
 307                                         $this->mRelevantUser = $user;
 308                                 }
 309                         }
 310                         return $this->mRelevantUser;
 311                 }
 312                 return null;
 313         }
 314
 315         /**
 316          * Outputs the HTML generated by other functions.
 317          * @param $out Object: instance of OutputPage
 318          * @todo Exterminate!
 319          */
 320         function outputPage( OutputPage $out ) {
 321                 global $wgDebugComments;
 322                 wfProfileIn( __METHOD__ );
 323
 324                 $this->initPage( $out );
 325
 326                 // See self::afterContentHook() for documentation
 327                 $afterContent = $this->afterContentHook();
 328
 329                 $out->out( $out->headElement( $this ) );
 330
 331                 if ( $wgDebugComments ) {
 332                         $out->out( "<!-- Debug output:\n" .
 333                           $out->mDebugtext . "-->\n" );
 334                 }
 335
 336                 $out->out( $this->beforeContent() );
 337
 338                 $out->out( $out->mBodytext . "\n" );
 339
 340                 $out->out( $this->afterContent() );
 341
 342                 $out->out( $afterContent );
 343
 344                 $out->out( $this->bottomScripts( $out ) );
 345
 346                 $out->out( wfReportTime() );
 347
 348                 $out->out( "\n</body></html>" );
 349                 wfProfileOut( __METHOD__ );
 350         }
 351
 352         static function makeVariablesScript( $data ) {
 353                 if ( $data ) {
 354                         return Html::inlineScript(
 355                                 ResourceLoader::makeLoaderConditionalScript( ResourceLoader::makeConfigSetScript( $data ) )
 356                         );
 357                 } else {
 358                         return '';
 359                 }
 360         }
 361
 362         /**
 363          * To make it harder for someone to slip a user a fake
 364          * user-JavaScript or user-CSS preview, a random token
 365          * is associated with the login session. If it's not
 366          * passed back with the preview request, we won't render
 367          * the code.
 368          *
 369          * @param $action String: 'edit', 'submit' etc.
 370          * @return bool
 371          */
 372         public function userCanPreview( $action ) {
 373                 if ( $action != 'submit' ) {
 374                         return false;
 375                 }
 376                 if ( !$this->getContext()->getRequest()->wasPosted() ) {
 377                         return false;
 378                 }
 379                 if ( !$this->getTitle()->userCanEditCssSubpage() ) {
 380                         return false;
 381                 }
 382                 if ( !$this->getTitle()->userCanEditJsSubpage() ) {
 383                         return false;
 384                 }
 385
 386                 return $this->getContext()->getUser()->matchEditToken(
 387                         $this->getContext()->getRequest()->getVal( 'wpEditToken' ) );
 388         }
 389
 390         /**
 391          * Generated JavaScript action=raw&gen=js
 392          * This returns MediaWiki:Common.js and MediaWiki:[Skinname].js concate-
 393          * nated together.  For some bizarre reason, it does *not* return any
 394          * custom user JS from subpages.  Huh?
 395          *
 396          * There's absolutely no reason to have separate Monobook/Common JSes.
 397          * Any JS that cares can just check the skin variable generated at the
 398          * top.  For now Monobook.js will be maintained, but it should be consi-
 399          * dered deprecated.
 400          *
 401          * @param $skinName String: If set, overrides the skin name
 402          * @return string
 403          */
 404         public function generateUserJs( $skinName = null ) {
 405
 406                 // Stub - see ResourceLoaderSiteModule, CologneBlue, Simple and Standard skins override this
 407
 408                 return '';
 409         }
 410
 411         /**
 412          * Generate user stylesheet for action=raw&gen=css
 413          */
 414         public function generateUserStylesheet() {
 415
 416                 // Stub - see ResourceLoaderUserModule, CologneBlue, Simple and Standard skins override this
 417
 418                 return '';
 419         }
 420
 421         /**
 422          * Split for easier subclassing in SkinSimple, SkinStandard and SkinCologneBlue
 423          * Anything in here won't be generated if $wgAllowUserCssPrefs is false.
 424          */
 425         protected function reallyGenerateUserStylesheet() {
 426
 427                 // Stub - see  ResourceLoaderUserModule, CologneBlue, Simple and Standard skins override this
 428
 429                 return '';
 430         }
 431
 432         /**
 433          * @private
 434          */
 435         function setupUserCss( OutputPage $out ) {
 436                 global $wgUseSiteCss, $wgAllowUserCss, $wgAllowUserCssPrefs;
 437
 438                 wfProfileIn( __METHOD__ );
 439
 440                 $this->setupSkinUserCss( $out );
 441                 // Add any extension CSS
 442                 foreach ( $out->getExtStyle() as $url ) {
 443                         $out->addStyle( $url );
 444                 }
 445
 446                 // Per-site custom styles
 447                 if ( $wgUseSiteCss ) {
 448                         $out->addModuleStyles( array( 'site', 'noscript' ) );
 449                         if( $this->getContext()->getUser()->isLoggedIn() ){
 450                                 $out->addModuleStyles( 'user.groups' );
 451                         }
 452                 }
 453
 454                 // Per-user custom styles
 455                 if ( $wgAllowUserCss ) {
 456                         if ( $this->getTitle()->isCssSubpage() && $this->userCanPreview( $this->getContext()->getRequest()->getVal( 'action' ) ) ) {
 457                                 // @FIXME: properly escape the cdata!
 458                                 $out->addInlineStyle( $this->getContext()->getRequest()->getText( 'wpTextbox1' ) );
 459                         } else {
 460                                 $out->addModuleStyles( 'user' );
 461                         }
 462                 }
 463
 464                 // Per-user preference styles
 465                 if ( $wgAllowUserCssPrefs ) {
 466                         $out->addModuleStyles( 'user.options' );
 467                 }
 468
 469                 wfProfileOut( __METHOD__ );
 470         }
 471
 472         /**
 473          * Get the query to generate a dynamic stylesheet
 474          *
 475          * @return array
 476          */
 477         public static function getDynamicStylesheetQuery() {
 478                 global $wgSquidMaxage;
 479
 480                 return array(
 481                                 'action' => 'raw',
 482                                 'maxage' => $wgSquidMaxage,
 483                                 'usemsgcache' => 'yes',
 484                                 'ctype' => 'text/css',
 485                                 'smaxage' => $wgSquidMaxage,
 486                         );
 487         }
 488
 489         /**
 490          * Add skin specific stylesheets
 491          * @param $out OutputPage
 492          * @delete
 493          */
 494         abstract function setupSkinUserCss( OutputPage $out );
 495
 496         function getPageClasses( $title ) {
 497                 $numeric = 'ns-' . $title->getNamespace();
 498
 499                 if ( $title->getNamespace() == NS_SPECIAL ) {
 500                         $type = 'ns-special';
 501                         // bug 23315: provide a class based on the canonical special page name without subpages
 502                         list( $canonicalName ) = SpecialPage::resolveAliasWithSubpage( $title->getDBkey() );
 503                         if ( $canonicalName ) {
 504                                 $type .= ' ' . Sanitizer::escapeClass( "mw-special-$canonicalName" );
 505                         } else {
 506                                 $type .= ' mw-invalidspecialpage';
 507                         }
 508                 } elseif ( $title->isTalkPage() ) {
 509                         $type = 'ns-talk';
 510                 } else {
 511                         $type = 'ns-subject';
 512                 }
 513
 514                 $name = Sanitizer::escapeClass( 'page-' . $title->getPrefixedText() );
 515
 516                 return "$numeric $type $name";
 517         }
 518
 519         /**
 520          * This will be called by OutputPage::headElement when it is creating the
 521          * <body> tag, skins can override it if they have a need to add in any
 522          * body attributes or classes of their own.
 523          */
 524         function addToBodyAttributes( $out, &$bodyAttrs ) {
 525                 // does nothing by default
 526         }
 527
 528         /**
 529          * URL to the logo
 530          */
 531         function getLogo() {
 532                 global $wgLogo;
 533                 return $wgLogo;
 534         }
 535
 536         /**
 537          * The format without an explicit $out argument is deprecated
 538          */
 539         function getCategoryLinks( OutputPage $out=null ) {
 540                 global $wgUseCategoryBrowser, $wgContLang;
 541
 542                 if ( count( $out->mCategoryLinks ) == 0 ) {
 543                         return '';
 544                 }
 545
 546                 # Separator
 547                 $sep = wfMsgExt( 'catseparator', array( 'parsemag', 'escapenoentities' ) );
 548
 549                 // Use Unicode bidi embedding override characters,
 550                 // to make sure links don't smash each other up in ugly ways.
 551                 $dir = $wgContLang->getDir();
 552                 $embed = "<span dir='$dir'>";
 553                 $pop = '</span>';
 554
 555                 $allCats = $out->getCategoryLinks();
 556                 $s = '';
 557                 $colon = wfMsgExt( 'colon-separator', 'escapenoentities' );
 558
 559                 if ( !empty( $allCats['normal'] ) ) {
 560                         $t = $embed . implode( "{$pop} {$sep} {$embed}" , $allCats['normal'] ) . $pop;
 561
 562                         $msg = wfMsgExt( 'pagecategories', array( 'parsemag', 'escapenoentities' ), count( $allCats['normal'] ) );
 563                         $s .= '<div id="mw-normal-catlinks">' .
 564                                 $this->link( Title::newFromText( wfMsgForContent( 'pagecategorieslink' ) ), $msg )
 565                                 . $colon . $t . '</div>';
 566                 }
 567
 568                 # Hidden categories
 569                 if ( isset( $allCats['hidden'] ) ) {
 570                         if ( $this->getContext()->getUser()->getBoolOption( 'showhiddencats' ) ) {
 571                                 $class = 'mw-hidden-cats-user-shown';
 572                         } elseif ( $this->getTitle()->getNamespace() == NS_CATEGORY ) {
 573                                 $class = 'mw-hidden-cats-ns-shown';
 574                         } else {
 575                                 $class = 'mw-hidden-cats-hidden';
 576                         }
 577
 578                         $s .= "<div id=\"mw-hidden-catlinks\" class=\"$class\">" .
 579                                 wfMsgExt( 'hidden-categories', array( 'parsemag', 'escapenoentities' ), count( $allCats['hidden'] ) ) .
 580                                 $colon . $embed . implode( "$pop $sep $embed", $allCats['hidden'] ) . $pop .
 581                                 '</div>';
 582                 }
 583
 584                 # optional 'dmoz-like' category browser. Will be shown under the list
 585                 # of categories an article belong to
 586                 if ( $wgUseCategoryBrowser ) {
 587                         $s .= '<br /><hr />';
 588
 589                         # get a big array of the parents tree
 590                         $parenttree = $this->getTitle()->getParentCategoryTree();
 591                         # Skin object passed by reference cause it can not be
 592                         # accessed under the method subfunction drawCategoryBrowser
 593                         $tempout = explode( "\n", $this->drawCategoryBrowser( $parenttree, $this ) );
 594                         # Clean out bogus first entry and sort them
 595                         unset( $tempout[0] );
 596                         asort( $tempout );
 597                         # Output one per line
 598                         $s .= implode( "<br />\n", $tempout );
 599                 }
 600
 601                 return $s;
 602         }
 603
 604         /**
 605          * Render the array as a serie of links.
 606          * @param $tree Array: categories tree returned by Title::getParentCategoryTree
 607          * @param &skin Object: skin passed by reference
 608          * @return String separated by &gt;, terminate with "\n"
 609          */
 610         function drawCategoryBrowser( $tree, &$skin ) {
 611                 $return = '';
 612
 613                 foreach ( $tree as $element => $parent ) {
 614                         if ( empty( $parent ) ) {
 615                                 # element start a new list
 616                                 $return .= "\n";
 617                         } else {
 618                                 # grab the others elements
 619                                 $return .= $this->drawCategoryBrowser( $parent, $skin ) . ' &gt; ';
 620                         }
 621
 622                         # add our current element to the list
 623                         $eltitle = Title::newFromText( $element );
 624                         $return .=  $skin->link( $eltitle, $eltitle->getText() );
 625                 }
 626
 627                 return $return;
 628         }
 629
 630         /**
 631          * The ->getCategories() form is deprecated, please instead use
 632          * the ->getCategories( $out ) form with whatout OutputPage is on hand
 633          */
 634         function getCategories( OutputPage $out=null ) {
 635
 636                 $catlinks = $this->getCategoryLinks( $out );
 637
 638                 $classes = 'catlinks';
 639
 640                 // Check what we're showing
 641                 $allCats = $out->getCategoryLinks();
 642                 $showHidden = $this->getContext()->getUser()->getBoolOption( 'showhiddencats' ) ||
 643                                                 $this->getTitle()->getNamespace() == NS_CATEGORY;
 644
 645                 if ( empty( $allCats['normal'] ) && !( !empty( $allCats['hidden'] ) && $showHidden ) ) {
 646                         $classes .= ' catlinks-allhidden';
 647                 }
 648
 649                 return "<div id='catlinks' class='$classes'>{$catlinks}</div>";
 650         }
 651
 652         /**
 653          * This runs a hook to allow extensions placing their stuff after content
 654          * and article metadata (e.g. categories).
 655          * Note: This function has nothing to do with afterContent().
 656          *
 657          * This hook is placed here in order to allow using the same hook for all
 658          * skins, both the SkinTemplate based ones and the older ones, which directly
 659          * use this class to get their data.
 660          *
 661          * The output of this function gets processed in SkinTemplate::outputPage() for
 662          * the SkinTemplate based skins, all other skins should directly echo it.
 663          *
 664          * Returns an empty string by default, if not changed by any hook function.
 665          */
 666         protected function afterContentHook() {
 667                 $data = '';
 668
 669                 if ( wfRunHooks( 'SkinAfterContent', array( &$data, $this ) ) ) {
 670                         // adding just some spaces shouldn't toggle the output
 671                         // of the whole <div/>, so we use trim() here
 672                         if ( trim( $data ) != '' ) {
 673                                 // Doing this here instead of in the skins to
 674                                 // ensure that the div has the same ID in all
 675                                 // skins
 676                                 $data = "<div id='mw-data-after-content'>\n" .
 677                                         "\t$data\n" .
 678                                         "</div>\n";
 679                         }
 680                 } else {
 681                         wfDebug( "Hook SkinAfterContent changed output processing.\n" );
 682                 }
 683
 684                 return $data;
 685         }
 686
 687         /**
 688          * Generate debug data HTML for displaying at the bottom of the main content
 689          * area.
 690          * @return String HTML containing debug data, if enabled (otherwise empty).
 691          */
 692         protected function generateDebugHTML( OutputPage $out ) {
 693                 global $wgShowDebug;
 694
 695                 if ( $wgShowDebug ) {
 696                         $listInternals = $this->formatDebugHTML( $out->mDebugtext );
 697                         return "\n<hr />\n<strong>Debug data:</strong><ul id=\"mw-debug-html\">" .
 698                                 $listInternals . "</ul>\n";
 699                 }
 700
 701                 return '';
 702         }
 703
 704         private function formatDebugHTML( $debugText ) {
 705                 global $wgDebugTimestamps;
 706
 707                 $lines = explode( "\n", $debugText );
 708                 $curIdent = 0;
 709                 $ret = '<li>';
 710
 711                 foreach ( $lines as $line ) {
 712                         $pre = '';
 713                         if ( $wgDebugTimestamps ) {
 714                                 $matches = array();
 715                                 if ( preg_match( '/^(\d+\.\d+\s{2})/', $line, $matches ) ) {
 716                                         $pre = $matches[1];
 717                                         $line = substr( $line, strlen( $pre ) );
 718                                 }
 719                         }
 720                         $display = ltrim( $line );
 721                         $ident = strlen( $line ) - strlen( $display );
 722                         $diff = $ident - $curIdent;
 723
 724                         $display = $pre . $display;
 725                         if ( $display == '' ) {
 726                                 $display = "\xc2\xa0";
 727                         }
 728
 729                         if ( !$ident && $diff < 0 && substr( $display, 0, 9 ) != 'Entering ' && substr( $display, 0, 8 ) != 'Exiting ' ) {
 730                                 $ident = $curIdent;
 731                                 $diff = 0;
 732                                 $display = '<span style="background:yellow;">' . htmlspecialchars( $display ) . '</span>';
 733                         } else {
 734                                 $display = htmlspecialchars( $display );
 735                         }
 736
 737                         if ( $diff < 0 ) {
 738                                 $ret .= str_repeat( "</li></ul>\n", -$diff ) . "</li><li>\n";
 739                         } elseif ( $diff == 0 ) {
 740                                 $ret .= "</li><li>\n";
 741                         } else {
 742                                 $ret .= str_repeat( "<ul><li>\n", $diff );
 743                         }
 744                         $ret .= "<tt>$display</tt>\n";
 745
 746                         $curIdent = $ident;
 747                 }
 748
 749                 $ret .= str_repeat( '</li></ul>', $curIdent ) . '</li>';
 750
 751                 return $ret;
 752         }
 753
 754         /**
 755          * This gets called shortly before the </body> tag.
 756          * @param $out OutputPage object
 757          * @return String HTML-wrapped JS code to be put before </body>
 758          */
 759         function bottomScripts( $out ) {
 760                 $bottomScriptText = "\n" . $out->getHeadScripts( $this );
 761                 wfRunHooks( 'SkinAfterBottomScripts', array( $this, &$bottomScriptText ) );
 762
 763                 return $bottomScriptText;
 764         }
 765
 766         /** @return string Retrievied from HTML text */
 767         function printSource() {
 768                 $url = htmlspecialchars( $this->getTitle()->getFullURL() );
 769                 return wfMsg( 'retrievedfrom', '<a href="' . $url . '">' . $url . '</a>' );
 770         }
 771
 772         function getUndeleteLink() {
 773                 $action = $this->getContext()->getRequest()->getVal( 'action', 'view' );
 774
 775                 if ( $this->getContext()->getUser()->isAllowed( 'deletedhistory' ) &&
 776                         ( $this->getTitle()->getArticleId() == 0 || $action == 'history' ) ) {
 777                         $n = $this->getTitle()->isDeleted();
 778
 779                         if ( $n ) {
 780                                 if ( $this->getContext()->getUser()->isAllowed( 'undelete' ) ) {
 781                                         $msg = 'thisisdeleted';
 782                                 } else {
 783                                         $msg = 'viewdeleted';
 784                                 }
 785
 786                                 return wfMsg(
 787                                         $msg,
 788                                         $this->link(
 789                                                 SpecialPage::getTitleFor( 'Undelete', $this->getTitle()->getPrefixedDBkey() ),
 790                                                 wfMsgExt( 'restorelink', array( 'parsemag', 'escape' ), $this->getContext()->getLang()->formatNum( $n ) ),
 791                                                 array(),
 792                                                 array(),
 793                                                 array( 'known', 'noclasses' )
 794                                         )
 795                                 );
 796                         }
 797                 }
 798
 799                 return '';
 800         }
 801
 802         /**
 803          * The format without an explicit $out argument is deprecated
 804          */
 805         function subPageSubtitle( OutputPage $out=null ) {
 806                 $out = $this->getContext()->getOutput();
 807                 $subpages = '';
 808
 809                 if ( !wfRunHooks( 'SkinSubPageSubtitle', array( &$subpages, $this, $out ) ) ) {
 810                         return $subpages;
 811                 }
 812
 813                 if ( $out->isArticle() && MWNamespace::hasSubpages( $out->getTitle()->getNamespace() ) ) {
 814                         $ptext = $this->getTitle()->getPrefixedText();
 815                         if ( preg_match( '/\//', $ptext ) ) {
 816                                 $links = explode( '/', $ptext );
 817                                 array_pop( $links );
 818                                 $c = 0;
 819                                 $growinglink = '';
 820                                 $display = '';
 821
 822                                 foreach ( $links as $link ) {
 823                                         $growinglink .= $link;
 824                                         $display .= $link;
 825                                         $linkObj = Title::newFromText( $growinglink );
 826
 827                                         if ( is_object( $linkObj ) && $linkObj->exists() ) {
 828                                                 $getlink = $this->link(
 829                                                         $linkObj,
 830                                                         htmlspecialchars( $display ),
 831                                                         array(),
 832                                                         array(),
 833                                                         array( 'known', 'noclasses' )
 834                                                 );
 835
 836                                                 $c++;
 837
 838                                                 if ( $c > 1 ) {
 839                                                         $subpages .= wfMsgExt( 'pipe-separator', 'escapenoentities' );
 840                                                 } else  {
 841                                                         $subpages .= '&lt; ';
 842                                                 }
 843
 844                                                 $subpages .= $getlink;
 845                                                 $display = '';
 846                                         } else {
 847                                                 $display .= '/';
 848                                         }
 849                                         $growinglink .= '/';
 850                                 }
 851                         }
 852                 }
 853
 854                 return $subpages;
 855         }
 856
 857         /**
 858          * Returns true if the IP should be shown in the header
 859          */
 860         function showIPinHeader() {
 861                 global $wgShowIPinHeader;
 862                 return $wgShowIPinHeader && session_id() != '';
 863         }
 864
 865         function getSearchLink() {
 866                 $searchPage = SpecialPage::getTitleFor( 'Search' );
 867                 return $searchPage->getLocalURL();
 868         }
 869
 870         function escapeSearchLink() {
 871                 return htmlspecialchars( $this->getSearchLink() );
 872         }
 873
 874         function getCopyright( $type = 'detect' ) {
 875                 global $wgRightsPage, $wgRightsUrl, $wgRightsText;
 876
 877                 if ( $type == 'detect' ) {
 878                         $diff = $this->getContext()->getRequest()->getVal( 'diff' );
 879
 880                         if ( is_null( $diff ) && !$this->isRevisionCurrent() && wfMsgForContent( 'history_copyright' ) !== '-' ) {
 881                                 $type = 'history';
 882                         } else {
 883                                 $type = 'normal';
 884                         }
 885                 }
 886
 887                 if ( $type == 'history' ) {
 888                         $msg = 'history_copyright';
 889                 } else {
 890                         $msg = 'copyright';
 891                 }
 892
 893                 $out = '';
 894
 895                 if ( $wgRightsPage ) {
 896                         $title = Title::newFromText( $wgRightsPage );
 897                         $link = $this->linkKnown( $title, $wgRightsText );
 898                 } elseif ( $wgRightsUrl ) {
 899                         $link = $this->makeExternalLink( $wgRightsUrl, $wgRightsText );
 900                 } elseif ( $wgRightsText ) {
 901                         $link = $wgRightsText;
 902                 } else {
 903                         # Give up now
 904                         return $out;
 905                 }
 906
 907                 // Allow for site and per-namespace customization of copyright notice.
 908                 $forContent = true;
 909
 910                 wfRunHooks( 'SkinCopyrightFooter', array( $this->getTitle(), $type, &$msg, &$link, &$forContent ) );
 911
 912                 if ( $forContent ) {
 913                         $out .= wfMsgForContent( $msg, $link );
 914                 } else {
 915                         $out .= wfMsg( $msg, $link );
 916                 }
 917
 918                 return $out;
 919         }
 920
 921         function getCopyrightIcon() {
 922                 global $wgRightsUrl, $wgRightsText, $wgRightsIcon, $wgCopyrightIcon;
 923
 924                 $out = '';
 925
 926                 if ( isset( $wgCopyrightIcon ) && $wgCopyrightIcon ) {
 927                         $out = $wgCopyrightIcon;
 928                 } elseif ( $wgRightsIcon ) {
 929                         $icon = htmlspecialchars( $wgRightsIcon );
 930
 931                         if ( $wgRightsUrl ) {
 932                                 $url = htmlspecialchars( $wgRightsUrl );
 933                                 $out .= '<a href="' . $url . '">';
 934                         }
 935
 936                         $text = htmlspecialchars( $wgRightsText );
 937                         $out .= "<img src=\"$icon\" alt=\"$text\" width=\"88\" height=\"31\" />";
 938
 939                         if ( $wgRightsUrl ) {
 940                                 $out .= '</a>';
 941                         }
 942                 }
 943
 944                 return $out;
 945         }
 946
 947         /**
 948          * Gets the powered by MediaWiki icon.
 949          * @return string
 950          */
 951         function getPoweredBy() {
 952                 global $wgStylePath;
 953
 954                 $url = htmlspecialchars( "$wgStylePath/common/images/poweredby_mediawiki_88x31.png" );
 955                 $text = '<a href="http://www.mediawiki.org/"><img src="' . $url . '" height="31" width="88" alt="Powered by MediaWiki" /></a>';
 956                 wfRunHooks( 'SkinGetPoweredBy', array( &$text, $this ) );
 957                 return $text;
 958         }
 959
 960         /**
 961          * Get the timestamp of the latest revision, formatted in user language
 962          *
 963          * @param $article Article object. Used if we're working with the current revision
 964          * @return String
 965          */
 966         protected function lastModified( $article ) {
 967                 if ( !$this->isRevisionCurrent() ) {
 968                         $timestamp = Revision::getTimestampFromId( $this->getTitle(), $this->mRevisionId );
 969                 } else {
 970                         $timestamp = $article->getTimestamp();
 971                 }
 972
 973                 if ( $timestamp ) {
 974                         $d = $this->getContext()->getLang()->date( $timestamp, true );
 975                         $t = $this->getContext()->getLang()->time( $timestamp, true );
 976                         $s = ' ' . wfMsg( 'lastmodifiedat', $d, $t );
 977                 } else {
 978                         $s = '';
 979                 }
 980
 981                 if ( wfGetLB()->getLaggedSlaveMode() ) {
 982                         $s .= ' <strong>' . wfMsg( 'laggedslavemode' ) . '</strong>';
 983                 }
 984
 985                 return $s;
 986         }
 987
 988         function logoText( $align = '' ) {
 989                 if ( $align != '' ) {
 990                         $a = " align='{$align}'";
 991                 } else {
 992                         $a = '';
 993                 }
 994
 995                 $mp = wfMsg( 'mainpage' );
 996                 $mptitle = Title::newMainPage();
 997                 $url = ( is_object( $mptitle ) ? $mptitle->escapeLocalURL() : '' );
 998
 999                 $logourl = $this->getLogo();
1000                 $s = "<a href='{$url}'><img{$a} src='{$logourl}' alt='[{$mp}]' /></a>";
1001
1002                 return $s;
1003         }
1004
1005         /**
1006          * Renders a $wgFooterIcons icon acording to the method's arguments
1007          * @param $icon Array: The icon to build the html for, see $wgFooterIcons for the format of this array
1008          * @param $withImage Boolean: Whether to use the icon's image or output a text-only footericon
1009          */
1010         function makeFooterIcon( $icon, $withImage = 'withImage' ) {
1011                 if ( is_string( $icon ) ) {
1012                         $html = $icon;
1013                 } else { // Assuming array
1014                         $url = isset($icon["url"]) ? $icon["url"] : null;
1015                         unset( $icon["url"] );
1016                         if ( isset( $icon["src"] ) && $withImage === 'withImage' ) {
1017                                 $html = Html::element( 'img', $icon ); // do this the lazy way, just pass icon data as an attribute array
1018                         } else {
1019                                 $html = htmlspecialchars( $icon["alt"] );
1020                         }
1021                         if ( $url ) {
1022                                 $html = Html::rawElement( 'a', array( "href" => $url ), $html );
1023                         }
1024                 }
1025                 return $html;
1026         }
1027
1028         /**
1029          * Gets the link to the wiki's main page.
1030          * @return string
1031          */
1032         function mainPageLink() {
1033                 $s = $this->link(
1034                         Title::newMainPage(),
1035                         wfMsg( 'mainpage' ),
1036                         array(),
1037                         array(),
1038                         array( 'known', 'noclasses' )
1039                 );
1040
1041                 return $s;
1042         }
1043
1044         public function footerLink( $desc, $page ) {
1045                 // if the link description has been set to "-" in the default language,
1046                 if ( wfMsgForContent( $desc )  == '-' ) {
1047                         // then it is disabled, for all languages.
1048                         return '';
1049                 } else {
1050                         // Otherwise, we display the link for the user, described in their
1051                         // language (which may or may not be the same as the default language),
1052                         // but we make the link target be the one site-wide page.
1053                         $title = Title::newFromText( wfMsgForContent( $page ) );
1054
1055                         return $this->linkKnown(
1056                                 $title,
1057                                 wfMsgExt( $desc, array( 'parsemag', 'escapenoentities' ) )
1058                         );
1059                 }
1060         }
1061
1062         /**
1063          * Gets the link to the wiki's privacy policy page.
1064          */
1065         function privacyLink() {
1066                 return $this->footerLink( 'privacy', 'privacypage' );
1067         }
1068
1069         /**
1070          * Gets the link to the wiki's about page.
1071          */
1072         function aboutLink() {
1073                 return $this->footerLink( 'aboutsite', 'aboutpage' );
1074         }
1075
1076         /**
1077          * Gets the link to the wiki's general disclaimers page.
1078          */
1079         function disclaimerLink() {
1080                 return $this->footerLink( 'disclaimers', 'disclaimerpage' );
1081         }
1082
1083         /**
1084          * Return URL options for the 'edit page' link.
1085          * This may include an 'oldid' specifier, if the current page view is such.
1086          *
1087          * @return array
1088          * @private
1089          */
1090         function editUrlOptions() {
1091                 $options = array( 'action' => 'edit' );
1092
1093                 if ( !$this->isRevisionCurrent() ) {
1094                         $options['oldid'] = intval( $this->mRevisionId );
1095                 }
1096
1097                 return $options;
1098         }
1099
1100         function showEmailUser( $id ) {
1101                 $targetUser = User::newFromId( $id );
1102                 return $this->getContext()->getUser()->canSendEmail() && # the sending user must have a confirmed email address
1103                         $targetUser->canReceiveEmail(); # the target user must have a confirmed email address and allow emails from users
1104         }
1105
1106         /**
1107          * Return a fully resolved style path url to images or styles stored in the common folder.
1108          * This method returns a url resolved using the configured skin style path
1109          * and includes the style version inside of the url.
1110          * @param $name String: The name or path of a skin resource file
1111          * @return String The fully resolved style path url including styleversion
1112          */
1113         function getCommonStylePath( $name ) {
1114                 global $wgStylePath, $wgStyleVersion;
1115                 return "$wgStylePath/common/$name?$wgStyleVersion";
1116         }
1117
1118         /**
1119          * Return a fully resolved style path url to images or styles stored in the curent skins's folder.
1120          * This method returns a url resolved using the configured skin style path
1121          * and includes the style version inside of the url.
1122          * @param $name String: The name or path of a skin resource file
1123          * @return String The fully resolved style path url including styleversion
1124          */
1125         function getSkinStylePath( $name ) {
1126                 global $wgStylePath, $wgStyleVersion;
1127                 return "$wgStylePath/{$this->stylename}/$name?$wgStyleVersion";
1128         }
1129
1130         /* these are used extensively in SkinTemplate, but also some other places */
1131         static function makeMainPageUrl( $urlaction = '' ) {
1132                 $title = Title::newMainPage();
1133                 self::checkTitle( $title, '' );
1134
1135                 return $title->getLocalURL( $urlaction );
1136         }
1137
1138         static function makeSpecialUrl( $name, $urlaction = '' ) {
1139                 $title = SpecialPage::getTitleFor( $name );
1140                 return $title->getLocalURL( $urlaction );
1141         }
1142
1143         static function makeSpecialUrlSubpage( $name, $subpage, $urlaction = '' ) {
1144                 $title = SpecialPage::getSafeTitleFor( $name, $subpage );
1145                 return $title->getLocalURL( $urlaction );
1146         }
1147
1148         static function makeI18nUrl( $name, $urlaction = '' ) {
1149                 $title = Title::newFromText( wfMsgForContent( $name ) );
1150                 self::checkTitle( $title, $name );
1151                 return $title->getLocalURL( $urlaction );
1152         }
1153
1154         static function makeUrl( $name, $urlaction = '' ) {
1155                 $title = Title::newFromText( $name );
1156                 self::checkTitle( $title, $name );
1157
1158                 return $title->getLocalURL( $urlaction );
1159         }
1160
1161         /**
1162          * If url string starts with http, consider as external URL, else
1163          * internal
1164          */
1165         static function makeInternalOrExternalUrl( $name ) {
1166                 if ( preg_match( '/^(?:' . wfUrlProtocols() . ')/', $name ) ) {
1167                         return $name;
1168                 } else {
1169                         return self::makeUrl( $name );
1170                 }
1171         }
1172
1173         # this can be passed the NS number as defined in Language.php
1174         static function makeNSUrl( $name, $urlaction = '', $namespace = NS_MAIN ) {
1175                 $title = Title::makeTitleSafe( $namespace, $name );
1176                 self::checkTitle( $title, $name );
1177
1178                 return $title->getLocalURL( $urlaction );
1179         }
1180
1181         /* these return an array with the 'href' and boolean 'exists' */
1182         static function makeUrlDetails( $name, $urlaction = '' ) {
1183                 $title = Title::newFromText( $name );
1184                 self::checkTitle( $title, $name );
1185
1186                 return array(
1187                         'href' => $title->getLocalURL( $urlaction ),
1188                         'exists' => $title->getArticleID() != 0,
1189                 );
1190         }
1191
1192         /**
1193          * Make URL details where the article exists (or at least it's convenient to think so)
1194          */
1195         static function makeKnownUrlDetails( $name, $urlaction = '' ) {
1196                 $title = Title::newFromText( $name );
1197                 self::checkTitle( $title, $name );
1198
1199                 return array(
1200                         'href' => $title->getLocalURL( $urlaction ),
1201                         'exists' => true
1202                 );
1203         }
1204
1205         # make sure we have some title to operate on
1206         static function checkTitle( &$title, $name ) {
1207                 if ( !is_object( $title ) ) {
1208                         $title = Title::newFromText( $name );
1209                         if ( !is_object( $title ) ) {
1210                                 $title = Title::newFromText( '--error: link target missing--' );
1211                         }
1212                 }
1213         }
1214
1215         /**
1216          * Build an array that represents the sidebar(s), the navigation bar among them
1217          *
1218          * @return array
1219          */
1220         function buildSidebar() {
1221                 global $parserMemc, $wgEnableSidebarCache, $wgSidebarCacheExpiry;
1222                 wfProfileIn( __METHOD__ );
1223
1224                 $key = wfMemcKey( 'sidebar', $this->getContext()->getLang()->getCode() );
1225
1226                 if ( $wgEnableSidebarCache ) {
1227                         $cachedsidebar = $parserMemc->get( $key );
1228                         if ( $cachedsidebar ) {
1229                                 wfProfileOut( __METHOD__ );
1230                                 return $cachedsidebar;
1231                         }
1232                 }
1233
1234                 $bar = array();
1235                 $this->addToSidebar( $bar, 'sidebar' );
1236
1237                 wfRunHooks( 'SkinBuildSidebar', array( $this, &$bar ) );
1238                 if ( $wgEnableSidebarCache ) {
1239                         $parserMemc->set( $key, $bar, $wgSidebarCacheExpiry );
1240                 }
1241
1242                 wfProfileOut( __METHOD__ );
1243                 return $bar;
1244         }
1245         /**
1246          * Add content from a sidebar system message
1247          * Currently only used for MediaWiki:Sidebar (but may be used by Extensions)
1248          *
1249          * This is just a wrapper around addToSidebarPlain() for backwards compatibility
1250          *
1251          * @param &$bar array
1252          * @param $message String
1253          */
1254         function addToSidebar( &$bar, $message ) {
1255                 $this->addToSidebarPlain( $bar, wfMsgForContentNoTrans( $message ) );
1256         }
1257
1258         /**
1259          * Add content from plain text
1260          * @since 1.17
1261          * @param &$bar array
1262          * @param $text string
1263          */
1264         function addToSidebarPlain( &$bar, $text ) {
1265                 $lines = explode( "\n", $text );
1266                 $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.
1267
1268                 $heading = '';
1269
1270                 foreach ( $lines as $line ) {
1271                         if ( strpos( $line, '*' ) !== 0 ) {
1272                                 continue;
1273                         }
1274
1275                         if ( strpos( $line, '**' ) !== 0 ) {
1276                                 $heading = trim( $line, '* ' );
1277                                 if ( !array_key_exists( $heading, $bar ) ) {
1278                                         $bar[$heading] = array();
1279                                 }
1280                         } else {
1281                                 $line = trim( $line, '* ' );
1282
1283                                 if ( strpos( $line, '|' ) !== false ) { // sanity check
1284                                         $line = MessageCache::singleton()->transform( $line, false, null, $this->getTitle() );
1285                                         $line = array_map( 'trim', explode( '|', $line, 2 ) );
1286                                         $link = wfMsgForContent( $line[0] );
1287
1288                                         if ( $link == '-' ) {
1289                                                 continue;
1290                                         }
1291
1292                                         $text = wfMsgExt( $line[1], 'parsemag' );
1293
1294                                         if ( wfEmptyMsg( $line[1] ) ) {
1295                                                 $text = $line[1];
1296                                         }
1297
1298                                         if ( wfEmptyMsg( $line[0] ) ) {
1299                                                 $link = $line[0];
1300                                         }
1301
1302                                         if ( preg_match( '/^(?:' . wfUrlProtocols() . ')/', $link ) ) {
1303                                                 $href = $link;
1304                                         } else {
1305                                                 $title = Title::newFromText( $link );
1306
1307                                                 if ( $title ) {
1308                                                         $title = $title->fixSpecialName();
1309                                                         $href = $title->getLocalURL();
1310                                                 } else {
1311                                                         $href = 'INVALID-TITLE';
1312                                                 }
1313                                         }
1314
1315                                         $bar[$heading][] = array(
1316                                                 'text' => $text,
1317                                                 'href' => $href,
1318                                                 'id' => 'n-' . strtr( $line[1], ' ', '-' ),
1319                                                 'active' => false
1320                                         );
1321                                 } else if ( ( substr( $line, 0, 2 ) == '{{' ) && ( substr( $line, -2 ) == '}}' ) ) {
1322                                         global $wgParser;
1323
1324                                         $line = substr( $line, 2, strlen( $line ) - 4 );
1325
1326                                         $options = new ParserOptions();
1327                                         $options->setEditSection( false );
1328                                         $options->setInterfaceMessage( true );
1329                                         $wikiBar[$heading] = $wgParser->parse( wfMsgForContentNoTrans( $line ) , $this->getTitle(), $options )->getText();
1330                                 } else {
1331                                         continue;
1332                                 }
1333                         }
1334                 }
1335
1336                 if ( count( $wikiBar ) > 0 ) {
1337                         $bar = array_merge( $bar, $wikiBar );
1338                 }
1339
1340                 return $bar;
1341         }
1342
1343         /**
1344          * Should we include common/wikiprintable.css?  Skins that have their own
1345          * print stylesheet should override this and return false.  (This is an
1346          * ugly hack to get Monobook to play nicely with
1347          * OutputPage::headElement().)
1348          *
1349          * @return bool
1350          */
1351         public function commonPrintStylesheet() {
1352                 return true;
1353         }
1354
1355         /**
1356          * Gets new talk page messages for the current user.
1357          * @return MediaWiki message or if no new talk page messages, nothing
1358          */
1359         function getNewtalks() {
1360                 $out = $this->getContext()->getOutput();
1361
1362                 $newtalks = $this->getContext()->getUser()->getNewMessageLinks();
1363                 $ntl = '';
1364
1365                 if ( count( $newtalks ) == 1 && $newtalks[0]['wiki'] === wfWikiID() ) {
1366                         $userTitle = $this->mUser->getUserPage();
1367                         $userTalkTitle = $userTitle->getTalkPage();
1368
1369                         if ( !$userTalkTitle->equals( $out->getTitle() ) ) {
1370                                 $newMessagesLink = $this->link(
1371                                         $userTalkTitle,
1372                                         wfMsgHtml( 'newmessageslink' ),
1373                                         array(),
1374                                         array( 'redirect' => 'no' ),
1375                                         array( 'known', 'noclasses' )
1376                                 );
1377
1378                                 $newMessagesDiffLink = $this->link(
1379                                         $userTalkTitle,
1380                                         wfMsgHtml( 'newmessagesdifflink' ),
1381                                         array(),
1382                                         array( 'diff' => 'cur' ),
1383                                         array( 'known', 'noclasses' )
1384                                 );
1385
1386                                 $ntl = wfMsg(
1387                                         'youhavenewmessages',
1388                                         $newMessagesLink,
1389                                         $newMessagesDiffLink
1390                                 );
1391                                 # Disable Squid cache
1392                                 $out->setSquidMaxage( 0 );
1393                         }
1394                 } elseif ( count( $newtalks ) ) {
1395                         // _>" " for BC <= 1.16
1396                         $sep = str_replace( '_', ' ', wfMsgHtml( 'newtalkseparator' ) );
1397                         $msgs = array();
1398
1399                         foreach ( $newtalks as $newtalk ) {
1400                                 $msgs[] = Xml::element(
1401                                         'a',
1402                                         array( 'href' => $newtalk['link'] ), $newtalk['wiki']
1403                                 );
1404                         }
1405                         $parts = implode( $sep, $msgs );
1406                         $ntl = wfMsgHtml( 'youhavenewmessagesmulti', $parts );
1407                         $out->setSquidMaxage( 0 );
1408                 }
1409
1410                 return $ntl;
1411         }
1412
1413         /**
1414          * Get a cached notice
1415          *
1416          * @param $name String: message name, or 'default' for $wgSiteNotice
1417          * @return String: HTML fragment
1418          */
1419         private function getCachedNotice( $name ) {
1420                 global $wgRenderHashAppend, $parserMemc;
1421
1422                 wfProfileIn( __METHOD__ );
1423
1424                 $needParse = false;
1425
1426                 if( $name === 'default' ) {
1427                         // special case
1428                         global $wgSiteNotice;
1429                         $notice = $wgSiteNotice;
1430                         if( empty( $notice ) ) {
1431                                 wfProfileOut( __METHOD__ );
1432                                 return false;
1433                         }
1434                 } else {
1435                         $msg = wfMessage( $name )->inContentLanguage();
1436                         if( $msg->isDisabled() ) {
1437                                 wfProfileOut( __METHOD__ );
1438                                 return false;
1439                         }
1440                         $notice = $msg->plain();
1441                 }
1442
1443                 // Use the extra hash appender to let eg SSL variants separately cache.
1444                 $key = wfMemcKey( $name . $wgRenderHashAppend );
1445                 $cachedNotice = $parserMemc->get( $key );
1446                 if( is_array( $cachedNotice ) ) {
1447                         if( md5( $notice ) == $cachedNotice['hash'] ) {
1448                                 $notice = $cachedNotice['html'];
1449                         } else {
1450                                 $needParse = true;
1451                         }
1452                 } else {
1453                         $needParse = true;
1454                 }
1455
1456                 if ( $needParse ) {
1457                         $parsed = $this->getContext()->getOutput()->parse( $notice );
1458                         $parserMemc->set( $key, array( 'html' => $parsed, 'hash' => md5( $notice ) ), 600 );
1459                         $notice = $parsed;
1460                 }
1461
1462                 $notice = '<div id="localNotice">' .$notice . '</div>';
1463                 wfProfileOut( __METHOD__ );
1464                 return $notice;
1465         }
1466
1467         /**
1468          * Get a notice based on page's namespace
1469          *
1470          * @return String: HTML fragment
1471          */
1472         function getNamespaceNotice() {
1473                 wfProfileIn( __METHOD__ );
1474
1475                 $key = 'namespacenotice-' . $this->getTitle()->getNsText();
1476                 $namespaceNotice = $this->getCachedNotice( $key );
1477                 if ( $namespaceNotice && substr( $namespaceNotice, 0, 7 ) != '<p>&lt;' ) {
1478                         $namespaceNotice = '<div id="namespacebanner">' . $namespaceNotice . '</div>';
1479                 } else {
1480                         $namespaceNotice = '';
1481                 }
1482
1483                 wfProfileOut( __METHOD__ );
1484                 return $namespaceNotice;
1485         }
1486
1487         /**
1488          * Get the site notice
1489          *
1490          * @return String: HTML fragment
1491          */
1492         function getSiteNotice() {
1493                 wfProfileIn( __METHOD__ );
1494                 $siteNotice = '';
1495
1496                 if ( wfRunHooks( 'SiteNoticeBefore', array( &$siteNotice, $this ) ) ) {
1497                         if ( is_object( $this->getContext()->getUser() ) && $this->getContext()->getUser()->isLoggedIn() ) {
1498                                 $siteNotice = $this->getCachedNotice( 'sitenotice' );
1499                         } else {
1500                                 $anonNotice = $this->getCachedNotice( 'anonnotice' );
1501                                 if ( !$anonNotice ) {
1502                                         $siteNotice = $this->getCachedNotice( 'sitenotice' );
1503                                 } else {
1504                                         $siteNotice = $anonNotice;
1505                                 }
1506                         }
1507                         if ( !$siteNotice ) {
1508                                 $siteNotice = $this->getCachedNotice( 'default' );
1509                         }
1510                 }
1511
1512                 wfRunHooks( 'SiteNoticeAfter', array( &$siteNotice, $this ) );
1513                 wfProfileOut( __METHOD__ );
1514                 return $siteNotice;
1515         }
1516
1517         /**
1518          * Create a section edit link.  This supersedes editSectionLink() and
1519          * editSectionLinkForOther().
1520          *
1521          * @param $nt      Title  The title being linked to (may not be the same as
1522          *   $wgTitle, if the section is included from a template)
1523          * @param $section string The designation of the section being pointed to,
1524          *   to be included in the link, like "&section=$section"
1525          * @param $tooltip string The tooltip to use for the link: will be escaped
1526          *   and wrapped in the 'editsectionhint' message
1527          * @param $lang    string Language code
1528          * @return         string HTML to use for edit link
1529          */
1530         public function doEditSectionLink( Title $nt, $section, $tooltip = null, $lang = false ) {
1531                 // HTML generated here should probably have userlangattributes
1532                 // added to it for LTR text on RTL pages
1533                 $attribs = array();
1534                 if ( !is_null( $tooltip ) ) {
1535                         # Bug 25462: undo double-escaping.
1536                         $tooltip = Sanitizer::decodeCharReferences( $tooltip );
1537                         $attribs['title'] = wfMsgReal( 'editsectionhint', array( $tooltip ), true, $lang );
1538                 }
1539                 $link = Linker::link( $nt, wfMsgExt( 'editsection', array( 'language' => $lang ) ),
1540                         $attribs,
1541                         array( 'action' => 'edit', 'section' => $section ),
1542                         array( 'noclasses', 'known' )
1543                 );
1544
1545                 # Run the old hook.  This takes up half of the function . . . hopefully
1546                 # we can rid of it someday.
1547                 $attribs = '';
1548                 if ( $tooltip ) {
1549                         $attribs = htmlspecialchars( wfMsgReal( 'editsectionhint', array( $tooltip ), true, $lang ) );
1550                         $attribs = " title=\"$attribs\"";
1551                 }
1552                 $result = null;
1553                 wfRunHooks( 'EditSectionLink', array( &$this, $nt, $section, $attribs, $link, &$result, $lang ) );
1554                 if ( !is_null( $result ) ) {
1555                         # For reverse compatibility, add the brackets *after* the hook is
1556                         # run, and even add them to hook-provided text.  (This is the main
1557                         # reason that the EditSectionLink hook is deprecated in favor of
1558                         # DoEditSectionLink: it can't change the brackets or the span.)
1559                         $result = wfMsgExt( 'editsection-brackets', array( 'escape', 'replaceafter', 'language' => $lang ), $result );
1560                         return "<span class=\"editsection\">$result</span>";
1561                 }
1562
1563                 # Add the brackets and the span, and *then* run the nice new hook, with
1564                 # clean and non-redundant arguments.
1565                 $result = wfMsgExt( 'editsection-brackets', array( 'escape', 'replaceafter', 'language' => $lang ), $link );
1566                 $result = "<span class=\"editsection\">$result</span>";
1567
1568                 wfRunHooks( 'DoEditSectionLink', array( $this, $nt, $section, $tooltip, &$result, $lang ) );
1569                 return $result;
1570         }
1571
1572         /**
1573          * Use PHP's magic __call handler to intercept legacy calls to the linker
1574          * for backwards compatibility.
1575          *
1576          * @param $fname String Name of called method
1577          * @param $args Array Arguments to the method
1578          */
1579         function __call( $fname, $args ) {
1580                 if ( method_exists( 'Linker', $fname ) ) {
1581                         return call_user_func_array( array( 'Linker', $fname ), $args );
1582                 } else {
1583                         $className = get_class( $this );
1584                         throw new MWException( "Call to undefined method $className::$fname" );
1585                 }
1586         }
1587
1588 }