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         /**
  27          * todo Fixme: should be protected :-\
  28          * @var Title
  29          */
  30         var $mTitle = null;
  31         protected $mRelevantTitle = null;
  32         protected $mRelevantUser = null;
  33
  34         /**
  35          * Fetch the set of available skins.
  36          * @return array of strings
  37          */
  38         static function getSkinNames() {
  39                 global $wgValidSkinNames;
  40                 static $skinsInitialised = false;
  41
  42                 if ( !$skinsInitialised || !count( $wgValidSkinNames ) ) {
  43                         # Get a list of available skins
  44                         # Build using the regular expression '^(.*).php$'
  45                         # Array keys are all lower case, array value keep the case used by filename
  46                         #
  47                         wfProfileIn( __METHOD__ . '-init' );
  48
  49                         global $wgStyleDirectory;
  50
  51                         $skinDir = dir( $wgStyleDirectory );
  52
  53                         # while code from www.php.net
  54                         while ( false !== ( $file = $skinDir->read() ) ) {
  55                                 // Skip non-PHP files, hidden files, and '.dep' includes
  56                                 $matches = array();
  57
  58                                 if ( preg_match( '/^([^.]*)\.php$/', $file, $matches ) ) {
  59                                         $aSkin = $matches[1];
  60                                         $wgValidSkinNames[strtolower( $aSkin )] = $aSkin;
  61                                 }
  62                         }
  63                         $skinDir->close();
  64                         $skinsInitialised = true;
  65                         wfProfileOut( __METHOD__ . '-init' );
  66                 }
  67                 return $wgValidSkinNames;
  68         }
  69
  70         /**
  71          * Fetch the list of usable skins in regards to $wgSkipSkins.
  72          * Useful for Special:Preferences and other places where you
  73          * only want to show skins users _can_ use.
  74          * @return array of strings
  75          */
  76         public static function getUsableSkins() {
  77                 global $wgSkipSkins;
  78
  79                 $usableSkins = self::getSkinNames();
  80
  81                 foreach ( $wgSkipSkins as $skip ) {
  82                         unset( $usableSkins[$skip] );
  83                 }
  84
  85                 return $usableSkins;
  86         }
  87
  88         /**
  89          * Normalize a skin preference value to a form that can be loaded.
  90          * If a skin can't be found, it will fall back to the configured
  91          * default (or the old 'Classic' skin if that's broken).
  92          * @param $key String: 'monobook', 'standard', etc.
  93          * @return string
  94          */
  95         static function normalizeKey( $key ) {
  96                 global $wgDefaultSkin;
  97
  98                 $skinNames = Skin::getSkinNames();
  99
 100                 if ( $key == '' ) {
 101                         // Don't return the default immediately;
 102                         // in a misconfiguration we need to fall back.
 103                         $key = $wgDefaultSkin;
 104                 }
 105
 106                 if ( isset( $skinNames[$key] ) ) {
 107                         return $key;
 108                 }
 109
 110                 // Older versions of the software used a numeric setting
 111                 // in the user preferences.
 112                 $fallback = array(
 113                         0 => $wgDefaultSkin,
 114                         1 => 'nostalgia',
 115                         2 => 'cologneblue'
 116                 );
 117
 118                 if ( isset( $fallback[$key] ) ) {
 119                         $key = $fallback[$key];
 120                 }
 121
 122                 if ( isset( $skinNames[$key] ) ) {
 123                         return $key;
 124                 } else if ( isset( $skinNames[$wgDefaultSkin] ) ) {
 125                         return $wgDefaultSkin;
 126                 } else {
 127                         return 'vector';
 128                 }
 129         }
 130
 131         /**
 132          * Factory method for loading a skin of a given type
 133          * @param $key String: 'monobook', 'standard', etc.
 134          * @return Skin
 135          */
 136         static function &newFromKey( $key ) {
 137                 global $wgStyleDirectory;
 138
 139                 $key = Skin::normalizeKey( $key );
 140
 141                 $skinNames = Skin::getSkinNames();
 142                 $skinName = $skinNames[$key];
 143                 $className = "Skin{$skinName}";
 144
 145                 # Grab the skin class and initialise it.
 146                 if ( !class_exists( $className ) ) {
 147                         // Preload base classes to work around APC/PHP5 bug
 148                         $deps = "{$wgStyleDirectory}/{$skinName}.deps.php";
 149
 150                         if ( file_exists( $deps ) ) {
 151                                 include_once( $deps );
 152                         }
 153                         require_once( "{$wgStyleDirectory}/{$skinName}.php" );
 154
 155                         # Check if we got if not failback to default skin
 156                         if ( !class_exists( $className ) ) {
 157                                 # DO NOT die if the class isn't found. This breaks maintenance
 158                                 # scripts and can cause a user account to be unrecoverable
 159                                 # except by SQL manipulation if a previously valid skin name
 160                                 # is no longer valid.
 161                                 wfDebug( "Skin class does not exist: $className\n" );
 162                                 $className = 'SkinVector';
 163                                 require_once( "{$wgStyleDirectory}/Vector.php" );
 164                         }
 165                 }
 166                 $skin = new $className;
 167                 return $skin;
 168         }
 169
 170         /** @return string path to the skin stylesheet */
 171         function getStylesheet() {
 172                 return 'common/wikistandard.css';
 173         }
 174
 175         /** @return string skin name */
 176         public function getSkinName() {
 177                 return $this->skinname;
 178         }
 179
 180         function initPage( OutputPage $out ) {
 181                 wfProfileIn( __METHOD__ );
 182
 183                 $this->mRevisionId = $out->mRevisionId;
 184                 $this->preloadExistence();
 185                 $this->setMembers();
 186
 187                 wfProfileOut( __METHOD__ );
 188         }
 189
 190         /**
 191          * Preload the existence of three commonly-requested pages in a single query
 192          */
 193         function preloadExistence() {
 194                 global $wgUser;
 195
 196                 // User/talk link
 197                 $titles = array( $wgUser->getUserPage(), $wgUser->getTalkPage() );
 198
 199                 // Other tab link
 200                 if ( $this->mTitle->getNamespace() == NS_SPECIAL ) {
 201                         // nothing
 202                 } elseif ( $this->mTitle->isTalkPage() ) {
 203                         $titles[] = $this->mTitle->getSubjectPage();
 204                 } else {
 205                         $titles[] = $this->mTitle->getTalkPage();
 206                 }
 207
 208                 $lb = new LinkBatch( $titles );
 209                 $lb->setCaller( __METHOD__ );
 210                 $lb->execute();
 211         }
 212
 213         /**
 214          * Set some local variables
 215          */
 216         protected function setMembers() {
 217                 global $wgUser;
 218                 $this->mUser = $wgUser;
 219                 $this->userpage = $wgUser->getUserPage()->getPrefixedText();
 220                 $this->usercss = false;
 221         }
 222
 223         /**
 224          * Whether the revision displayed is the latest revision of the page
 225          *
 226          * @return Boolean
 227          */
 228         public function isRevisionCurrent() {
 229                 return $this->mRevisionId == 0 || $this->mRevisionId == $this->mTitle->getLatestRevID();
 230         }
 231
 232         /**
 233          * Set the title
 234          * @param $t Title object to use
 235          */
 236         public function setTitle( $t ) {
 237                 $this->mTitle = $t;
 238         }
 239
 240         /** Get the title
 241          *
 242          * @return Title
 243          */
 244         public function getTitle() {
 245                 return $this->mTitle;
 246         }
 247
 248         /**
 249          * Set the "relevant" title
 250          * @see self::getRelevantTitle()
 251          * @param $t Title object to use
 252          */
 253         public function setRelevantTitle( $t ) {
 254                 $this->mRelevantTitle = $t;
 255         }
 256
 257         /**
 258          * Return the "relevant" title.
 259          * A "relevant" title is not necessarily the actual title of the page.
 260          * Special pages like Special:MovePage use set the page they are acting on
 261          * as their "relevant" title, this allows the skin system to display things
 262          * such as content tabs which belong to to that page instead of displaying
 263          * a basic special page tab which has almost no meaning.
 264          */
 265         public function getRelevantTitle() {
 266                 if ( isset($this->mRelevantTitle) ) {
 267                         return $this->mRelevantTitle;
 268                 }
 269                 return $this->mTitle;
 270         }
 271
 272         /**
 273          * Set the "relevant" user
 274          * @see self::getRelevantUser()
 275          * @param $u User object to use
 276          */
 277         public function setRelevantUser( $u ) {
 278                 $this->mRelevantUser = $u;
 279         }
 280
 281         /**
 282          * Return the "relevant" user.
 283          * A "relevant" user is similar to a relevant title. Special pages like
 284          * Special:Contributions mark the user which they are relevant to so that
 285          * things like the toolbox can display the information they usually are only
 286          * able to display on a user's userpage and talkpage.
 287          */
 288         public function getRelevantUser() {
 289                 if ( isset($this->mRelevantUser) ) {
 290                         return $this->mRelevantUser;
 291                 }
 292                 $title = $this->getRelevantTitle();
 293                 if( $title->getNamespace() == NS_USER || $title->getNamespace() == NS_USER_TALK ) {
 294                         $rootUser = strtok( $title->getText(), '/' );
 295                         if ( User::isIP( $rootUser ) ) {
 296                                 $this->mRelevantUser = User::newFromName( $rootUser, false );
 297                         } else {
 298                                 $user = User::newFromName( $rootUser );
 299                                 if ( $user->isLoggedIn() ) {
 300                                         $this->mRelevantUser = $user;
 301                                 }
 302                         }
 303                         return $this->mRelevantUser;
 304                 }
 305                 return null;
 306         }
 307
 308         /**
 309          * Outputs the HTML generated by other functions.
 310          * @param $out Object: instance of OutputPage
 311          * @todo Exterminate!
 312          */
 313         function outputPage( OutputPage $out ) {
 314                 global $wgDebugComments;
 315                 wfProfileIn( __METHOD__ );
 316
 317                 $this->initPage( $out );
 318
 319                 // See self::afterContentHook() for documentation
 320                 $afterContent = $this->afterContentHook();
 321
 322                 $out->out( $out->headElement( $this ) );
 323
 324                 if ( $wgDebugComments ) {
 325                         $out->out( "<!-- Debug output:\n" .
 326                           $out->mDebugtext . "-->\n" );
 327                 }
 328
 329                 $out->out( $this->beforeContent() );
 330
 331                 $out->out( $out->mBodytext . "\n" );
 332
 333                 $out->out( $this->afterContent() );
 334
 335                 $out->out( $afterContent );
 336
 337                 $out->out( $this->bottomScripts( $out ) );
 338
 339                 $out->out( wfReportTime() );
 340
 341                 $out->out( "\n</body></html>" );
 342                 wfProfileOut( __METHOD__ );
 343         }
 344
 345         static function makeVariablesScript( $data ) {
 346                 if ( $data ) {
 347                         return Html::inlineScript(
 348                                 ResourceLoader::makeLoaderConditionalScript( ResourceLoader::makeConfigSetScript( $data ) )
 349                         );
 350                 } else {
 351                         return '';
 352                 }
 353         }
 354
 355         /**
 356          * To make it harder for someone to slip a user a fake
 357          * user-JavaScript or user-CSS preview, a random token
 358          * is associated with the login session. If it's not
 359          * passed back with the preview request, we won't render
 360          * the code.
 361          *
 362          * @param $action String: 'edit', 'submit' etc.
 363          * @return bool
 364          */
 365         public function userCanPreview( $action ) {
 366                 global $wgRequest, $wgUser;
 367
 368                 if ( $action != 'submit' ) {
 369                         return false;
 370                 }
 371                 if ( !$wgRequest->wasPosted() ) {
 372                         return false;
 373                 }
 374                 if ( !$this->mTitle->userCanEditCssSubpage() ) {
 375                         return false;
 376                 }
 377                 if ( !$this->mTitle->userCanEditJsSubpage() ) {
 378                         return false;
 379                 }
 380
 381                 return $wgUser->matchEditToken(
 382                         $wgRequest->getVal( 'wpEditToken' ) );
 383         }
 384
 385         /**
 386          * Generated JavaScript action=raw&gen=js
 387          * This returns MediaWiki:Common.js and MediaWiki:[Skinname].js concate-
 388          * nated together.  For some bizarre reason, it does *not* return any
 389          * custom user JS from subpages.  Huh?
 390          *
 391          * There's absolutely no reason to have separate Monobook/Common JSes.
 392          * Any JS that cares can just check the skin variable generated at the
 393          * top.  For now Monobook.js will be maintained, but it should be consi-
 394          * dered deprecated.
 395          *
 396          * @param $skinName String: If set, overrides the skin name
 397          * @return string
 398          */
 399         public function generateUserJs( $skinName = null ) {
 400
 401                 // Stub - see ResourceLoaderSiteModule, CologneBlue, Simple and Standard skins override this
 402
 403                 return '';
 404         }
 405
 406         /**
 407          * Generate user stylesheet for action=raw&gen=css
 408          */
 409         public function generateUserStylesheet() {
 410
 411                 // Stub - see ResourceLoaderUserModule, CologneBlue, Simple and Standard skins override this
 412
 413                 return '';
 414         }
 415
 416         /**
 417          * Split for easier subclassing in SkinSimple, SkinStandard and SkinCologneBlue
 418          * Anything in here won't be generated if $wgAllowUserCssPrefs is false.
 419          */
 420         protected function reallyGenerateUserStylesheet() {
 421
 422                 // Stub - see  ResourceLoaderUserModule, CologneBlue, Simple and Standard skins override this
 423
 424                 return '';
 425         }
 426
 427         /**
 428          * @private
 429          */
 430         function setupUserCss( OutputPage $out ) {
 431                 global $wgRequest, $wgUser;
 432                 global $wgUseSiteCss, $wgAllowUserCss, $wgAllowUserCssPrefs;
 433
 434                 wfProfileIn( __METHOD__ );
 435
 436                 $this->setupSkinUserCss( $out );
 437                 // Add any extension CSS
 438                 foreach ( $out->getExtStyle() as $url ) {
 439                         $out->addStyle( $url );
 440                 }
 441
 442                 // Per-site custom styles
 443                 if ( $wgUseSiteCss ) {
 444                         $out->addModuleStyles( array( 'site', 'noscript' ) );
 445                         if( $wgUser->isLoggedIn() ){
 446                                 $out->addModuleStyles( 'user.groups' );
 447                         }
 448                 }
 449
 450                 // Per-user custom styles
 451                 if ( $wgAllowUserCss ) {
 452                         if ( $this->mTitle->isCssSubpage() && $this->userCanPreview( $wgRequest->getVal( 'action' ) ) ) {
 453                                 // @FIXME: properly escape the cdata!
 454                                 $out->addInlineStyle( $wgRequest->getText( 'wpTextbox1' ) );
 455                         } else {
 456                                 $out->addModuleStyles( 'user' );
 457                         }
 458                 }
 459
 460                 // Per-user preference styles
 461                 if ( $wgAllowUserCssPrefs ) {
 462                         $out->addModuleStyles( 'user.options' );
 463                 }
 464
 465                 wfProfileOut( __METHOD__ );
 466         }
 467
 468         /**
 469          * Get the query to generate a dynamic stylesheet
 470          *
 471          * @return array
 472          */
 473         public static function getDynamicStylesheetQuery() {
 474                 global $wgSquidMaxage;
 475
 476                 return array(
 477                                 'action' => 'raw',
 478                                 'maxage' => $wgSquidMaxage,
 479                                 'usemsgcache' => 'yes',
 480                                 'ctype' => 'text/css',
 481                                 'smaxage' => $wgSquidMaxage,
 482                         );
 483         }
 484
 485         /**
 486          * Add skin specific stylesheets
 487          * @param $out OutputPage
 488          * @delete
 489          */
 490         abstract function setupSkinUserCss( OutputPage $out );
 491
 492         function getPageClasses( $title ) {
 493                 $numeric = 'ns-' . $title->getNamespace();
 494
 495                 if ( $title->getNamespace() == NS_SPECIAL ) {
 496                         $type = 'ns-special';
 497                         // bug 23315: provide a class based on the canonical special page name without subpages
 498                         list( $canonicalName ) = SpecialPage::resolveAliasWithSubpage( $title->getDBkey() );
 499                         if ( $canonicalName ) {
 500                                 $type .= ' ' . Sanitizer::escapeClass( "mw-special-$canonicalName" );
 501                         } else {
 502                                 $type .= ' mw-invalidspecialpage';
 503                         }
 504                 } elseif ( $title->isTalkPage() ) {
 505                         $type = 'ns-talk';
 506                 } else {
 507                         $type = 'ns-subject';
 508                 }
 509
 510                 $name = Sanitizer::escapeClass( 'page-' . $title->getPrefixedText() );
 511
 512                 return "$numeric $type $name";
 513         }
 514
 515         /**
 516          * This will be called by OutputPage::headElement when it is creating the
 517          * <body> tag, skins can override it if they have a need to add in any
 518          * body attributes or classes of their own.
 519          */
 520         function addToBodyAttributes( $out, &$bodyAttrs ) {
 521                 // does nothing by default
 522         }
 523
 524         /**
 525          * URL to the logo
 526          */
 527         function getLogo() {
 528                 global $wgLogo;
 529                 return $wgLogo;
 530         }
 531
 532         /**
 533          * The format without an explicit $out argument is deprecated
 534          */
 535         function getCategoryLinks( OutputPage $out=null ) {
 536                 global $wgUseCategoryBrowser, $wgContLang, $wgUser;
 537
 538                 if ( is_null( $out ) ) {
 539                         // Backwards compatibility for when there was no $out arg
 540                         global $wgOut;
 541                         $out = $wgOut;
 542                 }
 543
 544                 if ( count( $out->mCategoryLinks ) == 0 ) {
 545                         return '';
 546                 }
 547
 548                 # Separator
 549                 $sep = wfMsgExt( 'catseparator', array( 'parsemag', 'escapenoentities' ) );
 550
 551                 // Use Unicode bidi embedding override characters,
 552                 // to make sure links don't smash each other up in ugly ways.
 553                 $dir = $wgContLang->getDir();
 554                 $embed = "<span dir='$dir'>";
 555                 $pop = '</span>';
 556
 557                 $allCats = $out->getCategoryLinks();
 558                 $s = '';
 559                 $colon = wfMsgExt( 'colon-separator', 'escapenoentities' );
 560
 561                 if ( !empty( $allCats['normal'] ) ) {
 562                         $t = $embed . implode( "{$pop} {$sep} {$embed}" , $allCats['normal'] ) . $pop;
 563
 564                         $msg = wfMsgExt( 'pagecategories', array( 'parsemag', 'escapenoentities' ), count( $allCats['normal'] ) );
 565                         $s .= '<div id="mw-normal-catlinks">' .
 566                                 $this->link( Title::newFromText( wfMsgForContent( 'pagecategorieslink' ) ), $msg )
 567                                 . $colon . $t . '</div>';
 568                 }
 569
 570                 # Hidden categories
 571                 if ( isset( $allCats['hidden'] ) ) {
 572                         if ( $wgUser->getBoolOption( 'showhiddencats' ) ) {
 573                                 $class = 'mw-hidden-cats-user-shown';
 574                         } elseif ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
 575                                 $class = 'mw-hidden-cats-ns-shown';
 576                         } else {
 577                                 $class = 'mw-hidden-cats-hidden';
 578                         }
 579
 580                         $s .= "<div id=\"mw-hidden-catlinks\" class=\"$class\">" .
 581                                 wfMsgExt( 'hidden-categories', array( 'parsemag', 'escapenoentities' ), count( $allCats['hidden'] ) ) .
 582                                 $colon . $embed . implode( "$pop $sep $embed", $allCats['hidden'] ) . $pop .
 583                                 '</div>';
 584                 }
 585
 586                 # optional 'dmoz-like' category browser. Will be shown under the list
 587                 # of categories an article belong to
 588                 if ( $wgUseCategoryBrowser ) {
 589                         $s .= '<br /><hr />';
 590
 591                         # get a big array of the parents tree
 592                         $parenttree = $this->mTitle->getParentCategoryTree();
 593                         # Skin object passed by reference cause it can not be
 594                         # accessed under the method subfunction drawCategoryBrowser
 595                         $tempout = explode( "\n", $this->drawCategoryBrowser( $parenttree, $this ) );
 596                         # Clean out bogus first entry and sort them
 597                         unset( $tempout[0] );
 598                         asort( $tempout );
 599                         # Output one per line
 600                         $s .= implode( "<br />\n", $tempout );
 601                 }
 602
 603                 return $s;
 604         }
 605
 606         /**
 607          * Render the array as a serie of links.
 608          * @param $tree Array: categories tree returned by Title::getParentCategoryTree
 609          * @param &skin Object: skin passed by reference
 610          * @return String separated by &gt;, terminate with "\n"
 611          */
 612         function drawCategoryBrowser( $tree, &$skin ) {
 613                 $return = '';
 614
 615                 foreach ( $tree as $element => $parent ) {
 616                         if ( empty( $parent ) ) {
 617                                 # element start a new list
 618                                 $return .= "\n";
 619                         } else {
 620                                 # grab the others elements
 621                                 $return .= $this->drawCategoryBrowser( $parent, $skin ) . ' &gt; ';
 622                         }
 623
 624                         # add our current element to the list
 625                         $eltitle = Title::newFromText( $element );
 626                         $return .=  $skin->link( $eltitle, $eltitle->getText() );
 627                 }
 628
 629                 return $return;
 630         }
 631
 632         /**
 633          * The ->getCategories() form is deprecated, please instead use
 634          * the ->getCategories( $out ) form with whatout OutputPage is on hand
 635          */
 636         function getCategories( OutputPage $out=null ) {
 637                 if ( is_null( $out ) ) {
 638                         // Backwards compatibility for when there was no $out arg
 639                         global $wgOut;
 640                         $out = $wgOut;
 641                 }
 642
 643                 $catlinks = $this->getCategoryLinks( $out );
 644
 645                 $classes = 'catlinks';
 646
 647                 global $wgUser;
 648
 649                 // Check what we're showing
 650                 $allCats = $out->getCategoryLinks();
 651                 $showHidden = $wgUser->getBoolOption( 'showhiddencats' ) ||
 652                                                 $this->mTitle->getNamespace() == NS_CATEGORY;
 653
 654                 if ( empty( $allCats['normal'] ) && !( !empty( $allCats['hidden'] ) && $showHidden ) ) {
 655                         $classes .= ' catlinks-allhidden';
 656                 }
 657
 658                 return "<div id='catlinks' class='$classes'>{$catlinks}</div>";
 659         }
 660
 661         /**
 662          * This runs a hook to allow extensions placing their stuff after content
 663          * and article metadata (e.g. categories).
 664          * Note: This function has nothing to do with afterContent().
 665          *
 666          * This hook is placed here in order to allow using the same hook for all
 667          * skins, both the SkinTemplate based ones and the older ones, which directly
 668          * use this class to get their data.
 669          *
 670          * The output of this function gets processed in SkinTemplate::outputPage() for
 671          * the SkinTemplate based skins, all other skins should directly echo it.
 672          *
 673          * Returns an empty string by default, if not changed by any hook function.
 674          */
 675         protected function afterContentHook() {
 676                 $data = '';
 677
 678                 if ( wfRunHooks( 'SkinAfterContent', array( &$data, $this ) ) ) {
 679                         // adding just some spaces shouldn't toggle the output
 680                         // of the whole <div/>, so we use trim() here
 681                         if ( trim( $data ) != '' ) {
 682                                 // Doing this here instead of in the skins to
 683                                 // ensure that the div has the same ID in all
 684                                 // skins
 685                                 $data = "<div id='mw-data-after-content'>\n" .
 686                                         "\t$data\n" .
 687                                         "</div>\n";
 688                         }
 689                 } else {
 690                         wfDebug( "Hook SkinAfterContent changed output processing.\n" );
 691                 }
 692
 693                 return $data;
 694         }
 695
 696         /**
 697          * Generate debug data HTML for displaying at the bottom of the main content
 698          * area.
 699          * @return String HTML containing debug data, if enabled (otherwise empty).
 700          */
 701         protected function generateDebugHTML( OutputPage $out ) {
 702                 global $wgShowDebug;
 703
 704                 if ( $wgShowDebug ) {
 705                         $listInternals = $this->formatDebugHTML( $out->mDebugtext );
 706                         return "\n<hr />\n<strong>Debug data:</strong><ul id=\"mw-debug-html\">" .
 707                                 $listInternals . "</ul>\n";
 708                 }
 709
 710                 return '';
 711         }
 712
 713         private function formatDebugHTML( $debugText ) {
 714                 global $wgDebugTimestamps;
 715
 716                 $lines = explode( "\n", $debugText );
 717                 $curIdent = 0;
 718                 $ret = '<li>';
 719
 720                 foreach ( $lines as $line ) {
 721                         $pre = '';
 722                         if ( $wgDebugTimestamps ) {
 723                                 $matches = array();
 724                                 if ( preg_match( '/^(\d+\.\d+\s{2})/', $line, $matches ) ) {
 725                                         $pre = $matches[1];
 726                                         $line = substr( $line, strlen( $pre ) );
 727                                 }
 728                         }
 729                         $display = ltrim( $line );
 730                         $ident = strlen( $line ) - strlen( $display );
 731                         $diff = $ident - $curIdent;
 732
 733                         $display = $pre . $display;
 734                         if ( $display == '' ) {
 735                                 $display = "\xc2\xa0";
 736                         }
 737
 738                         if ( !$ident && $diff < 0 && substr( $display, 0, 9 ) != 'Entering ' && substr( $display, 0, 8 ) != 'Exiting ' ) {
 739                                 $ident = $curIdent;
 740                                 $diff = 0;
 741                                 $display = '<span style="background:yellow;">' . htmlspecialchars( $display ) . '</span>';
 742                         } else {
 743                                 $display = htmlspecialchars( $display );
 744                         }
 745
 746                         if ( $diff < 0 ) {
 747                                 $ret .= str_repeat( "</li></ul>\n", -$diff ) . "</li><li>\n";
 748                         } elseif ( $diff == 0 ) {
 749                                 $ret .= "</li><li>\n";
 750                         } else {
 751                                 $ret .= str_repeat( "<ul><li>\n", $diff );
 752                         }
 753                         $ret .= "<tt>$display</tt>\n";
 754
 755                         $curIdent = $ident;
 756                 }
 757
 758                 $ret .= str_repeat( '</li></ul>', $curIdent ) . '</li>';
 759
 760                 return $ret;
 761         }
 762
 763         /**
 764          * This gets called shortly before the </body> tag.
 765          * @param $out OutputPage object
 766          * @return String HTML-wrapped JS code to be put before </body>
 767          */
 768         function bottomScripts( $out ) {
 769                 $bottomScriptText = "\n" . $out->getHeadScripts( $this );
 770                 wfRunHooks( 'SkinAfterBottomScripts', array( $this, &$bottomScriptText ) );
 771
 772                 return $bottomScriptText;
 773         }
 774
 775         /** @return string Retrievied from HTML text */
 776         function printSource() {
 777                 $url = htmlspecialchars( $this->mTitle->getFullURL() );
 778                 return wfMsg( 'retrievedfrom', '<a href="' . $url . '">' . $url . '</a>' );
 779         }
 780
 781         function getUndeleteLink() {
 782                 global $wgUser, $wgLang, $wgRequest;
 783
 784                 $action = $wgRequest->getVal( 'action', 'view' );
 785
 786                 if ( $wgUser->isAllowed( 'deletedhistory' ) &&
 787                         ( $this->mTitle->getArticleId() == 0 || $action == 'history' ) ) {
 788                         $n = $this->mTitle->isDeleted();
 789
 790                         if ( $n ) {
 791                                 if ( $wgUser->isAllowed( 'undelete' ) ) {
 792                                         $msg = 'thisisdeleted';
 793                                 } else {
 794                                         $msg = 'viewdeleted';
 795                                 }
 796
 797                                 return wfMsg(
 798                                         $msg,
 799                                         $this->link(
 800                                                 SpecialPage::getTitleFor( 'Undelete', $this->mTitle->getPrefixedDBkey() ),
 801                                                 wfMsgExt( 'restorelink', array( 'parsemag', 'escape' ), $wgLang->formatNum( $n ) ),
 802                                                 array(),
 803                                                 array(),
 804                                                 array( 'known', 'noclasses' )
 805                                         )
 806                                 );
 807                         }
 808                 }
 809
 810                 return '';
 811         }
 812
 813         /**
 814          * The format without an explicit $out argument is deprecated
 815          */
 816         function subPageSubtitle( OutputPage $out=null ) {
 817                 if ( is_null( $out ) ) {
 818                         // Backwards compatibility for when there was no $out arg
 819                         global $wgOut;
 820                         $out = $wgOut;
 821                 }
 822
 823                 $subpages = '';
 824
 825                 if ( !wfRunHooks( 'SkinSubPageSubtitle', array( &$subpages, $this, $out ) ) ) {
 826                         return $subpages;
 827                 }
 828
 829                 if ( $out->isArticle() && MWNamespace::hasSubpages( $out->getTitle()->getNamespace() ) ) {
 830                         $ptext = $this->mTitle->getPrefixedText();
 831                         if ( preg_match( '/\//', $ptext ) ) {
 832                                 $links = explode( '/', $ptext );
 833                                 array_pop( $links );
 834                                 $c = 0;
 835                                 $growinglink = '';
 836                                 $display = '';
 837
 838                                 foreach ( $links as $link ) {
 839                                         $growinglink .= $link;
 840                                         $display .= $link;
 841                                         $linkObj = Title::newFromText( $growinglink );
 842
 843                                         if ( is_object( $linkObj ) && $linkObj->exists() ) {
 844                                                 $getlink = $this->link(
 845                                                         $linkObj,
 846                                                         htmlspecialchars( $display ),
 847                                                         array(),
 848                                                         array(),
 849                                                         array( 'known', 'noclasses' )
 850                                                 );
 851
 852                                                 $c++;
 853
 854                                                 if ( $c > 1 ) {
 855                                                         $subpages .= wfMsgExt( 'pipe-separator', 'escapenoentities' );
 856                                                 } else  {
 857                                                         $subpages .= '&lt; ';
 858                                                 }
 859
 860                                                 $subpages .= $getlink;
 861                                                 $display = '';
 862                                         } else {
 863                                                 $display .= '/';
 864                                         }
 865                                         $growinglink .= '/';
 866                                 }
 867                         }
 868                 }
 869
 870                 return $subpages;
 871         }
 872
 873         /**
 874          * Returns true if the IP should be shown in the header
 875          */
 876         function showIPinHeader() {
 877                 global $wgShowIPinHeader;
 878                 return $wgShowIPinHeader && session_id() != '';
 879         }
 880
 881         function getSearchLink() {
 882                 $searchPage = SpecialPage::getTitleFor( 'Search' );
 883                 return $searchPage->getLocalURL();
 884         }
 885
 886         function escapeSearchLink() {
 887                 return htmlspecialchars( $this->getSearchLink() );
 888         }
 889
 890         function getCopyright( $type = 'detect' ) {
 891                 global $wgRightsPage, $wgRightsUrl, $wgRightsText, $wgRequest;
 892
 893                 if ( $type == 'detect' ) {
 894                         $diff = $wgRequest->getVal( 'diff' );
 895
 896                         if ( is_null( $diff ) && !$this->isRevisionCurrent() && wfMsgForContent( 'history_copyright' ) !== '-' ) {
 897                                 $type = 'history';
 898                         } else {
 899                                 $type = 'normal';
 900                         }
 901                 }
 902
 903                 if ( $type == 'history' ) {
 904                         $msg = 'history_copyright';
 905                 } else {
 906                         $msg = 'copyright';
 907                 }
 908
 909                 $out = '';
 910
 911                 if ( $wgRightsPage ) {
 912                         $title = Title::newFromText( $wgRightsPage );
 913                         $link = $this->linkKnown( $title, $wgRightsText );
 914                 } elseif ( $wgRightsUrl ) {
 915                         $link = $this->makeExternalLink( $wgRightsUrl, $wgRightsText );
 916                 } elseif ( $wgRightsText ) {
 917                         $link = $wgRightsText;
 918                 } else {
 919                         # Give up now
 920                         return $out;
 921                 }
 922
 923                 // Allow for site and per-namespace customization of copyright notice.
 924                 $forContent = true;
 925
 926                 wfRunHooks( 'SkinCopyrightFooter', array( $this->mTitle, $type, &$msg, &$link, &$forContent ) );
 927
 928                 if ( $forContent ) {
 929                         $out .= wfMsgForContent( $msg, $link );
 930                 } else {
 931                         $out .= wfMsg( $msg, $link );
 932                 }
 933
 934                 return $out;
 935         }
 936
 937         function getCopyrightIcon() {
 938                 global $wgRightsUrl, $wgRightsText, $wgRightsIcon, $wgCopyrightIcon;
 939
 940                 $out = '';
 941
 942                 if ( isset( $wgCopyrightIcon ) && $wgCopyrightIcon ) {
 943                         $out = $wgCopyrightIcon;
 944                 } elseif ( $wgRightsIcon ) {
 945                         $icon = htmlspecialchars( $wgRightsIcon );
 946
 947                         if ( $wgRightsUrl ) {
 948                                 $url = htmlspecialchars( $wgRightsUrl );
 949                                 $out .= '<a href="' . $url . '">';
 950                         }
 951
 952                         $text = htmlspecialchars( $wgRightsText );
 953                         $out .= "<img src=\"$icon\" alt=\"$text\" width=\"88\" height=\"31\" />";
 954
 955                         if ( $wgRightsUrl ) {
 956                                 $out .= '</a>';
 957                         }
 958                 }
 959
 960                 return $out;
 961         }
 962
 963         /**
 964          * Gets the powered by MediaWiki icon.
 965          * @return string
 966          */
 967         function getPoweredBy() {
 968                 global $wgStylePath;
 969
 970                 $url = htmlspecialchars( "$wgStylePath/common/images/poweredby_mediawiki_88x31.png" );
 971                 $text = '<a href="http://www.mediawiki.org/"><img src="' . $url . '" height="31" width="88" alt="Powered by MediaWiki" /></a>';
 972                 wfRunHooks( 'SkinGetPoweredBy', array( &$text, $this ) );
 973                 return $text;
 974         }
 975
 976         /**
 977          * Get the timestamp of the latest revision, formatted in user language
 978          *
 979          * @param $article Article object. Used if we're working with the current revision
 980          * @return String
 981          */
 982         protected function lastModified( $article ) {
 983                 global $wgLang;
 984
 985                 if ( !$this->isRevisionCurrent() ) {
 986                         $timestamp = Revision::getTimestampFromId( $this->mTitle, $this->mRevisionId );
 987                 } else {
 988                         $timestamp = $article->getTimestamp();
 989                 }
 990
 991                 if ( $timestamp ) {
 992                         $d = $wgLang->date( $timestamp, true );
 993                         $t = $wgLang->time( $timestamp, true );
 994                         $s = ' ' . wfMsg( 'lastmodifiedat', $d, $t );
 995                 } else {
 996                         $s = '';
 997                 }
 998
 999                 if ( wfGetLB()->getLaggedSlaveMode() ) {
1000                         $s .= ' <strong>' . wfMsg( 'laggedslavemode' ) . '</strong>';
1001                 }
1002
1003                 return $s;
1004         }
1005
1006         function logoText( $align = '' ) {
1007                 if ( $align != '' ) {
1008                         $a = " align='{$align}'";
1009                 } else {
1010                         $a = '';
1011                 }
1012
1013                 $mp = wfMsg( 'mainpage' );
1014                 $mptitle = Title::newMainPage();
1015                 $url = ( is_object( $mptitle ) ? $mptitle->escapeLocalURL() : '' );
1016
1017                 $logourl = $this->getLogo();
1018                 $s = "<a href='{$url}'><img{$a} src='{$logourl}' alt='[{$mp}]' /></a>";
1019
1020                 return $s;
1021         }
1022
1023         /**
1024          * Renders a $wgFooterIcons icon acording to the method's arguments
1025          * @param $icon Array: The icon to build the html for, see $wgFooterIcons for the format of this array
1026          * @param $withImage Boolean: Whether to use the icon's image or output a text-only footericon
1027          */
1028         function makeFooterIcon( $icon, $withImage = 'withImage' ) {
1029                 if ( is_string( $icon ) ) {
1030                         $html = $icon;
1031                 } else { // Assuming array
1032                         $url = isset($icon["url"]) ? $icon["url"] : null;
1033                         unset( $icon["url"] );
1034                         if ( isset( $icon["src"] ) && $withImage === 'withImage' ) {
1035                                 $html = Html::element( 'img', $icon ); // do this the lazy way, just pass icon data as an attribute array
1036                         } else {
1037                                 $html = htmlspecialchars( $icon["alt"] );
1038                         }
1039                         if ( $url ) {
1040                                 $html = Html::rawElement( 'a', array( "href" => $url ), $html );
1041                         }
1042                 }
1043                 return $html;
1044         }
1045
1046         /**
1047          * Gets the link to the wiki's main page.
1048          * @return string
1049          */
1050         function mainPageLink() {
1051                 $s = $this->link(
1052                         Title::newMainPage(),
1053                         wfMsg( 'mainpage' ),
1054                         array(),
1055                         array(),
1056                         array( 'known', 'noclasses' )
1057                 );
1058
1059                 return $s;
1060         }
1061
1062         public function footerLink( $desc, $page ) {
1063                 // if the link description has been set to "-" in the default language,
1064                 if ( wfMsgForContent( $desc )  == '-' ) {
1065                         // then it is disabled, for all languages.
1066                         return '';
1067                 } else {
1068                         // Otherwise, we display the link for the user, described in their
1069                         // language (which may or may not be the same as the default language),
1070                         // but we make the link target be the one site-wide page.
1071                         $title = Title::newFromText( wfMsgForContent( $page ) );
1072
1073                         return $this->linkKnown(
1074                                 $title,
1075                                 wfMsgExt( $desc, array( 'parsemag', 'escapenoentities' ) )
1076                         );
1077                 }
1078         }
1079
1080         /**
1081          * Gets the link to the wiki's privacy policy page.
1082          */
1083         function privacyLink() {
1084                 return $this->footerLink( 'privacy', 'privacypage' );
1085         }
1086
1087         /**
1088          * Gets the link to the wiki's about page.
1089          */
1090         function aboutLink() {
1091                 return $this->footerLink( 'aboutsite', 'aboutpage' );
1092         }
1093
1094         /**
1095          * Gets the link to the wiki's general disclaimers page.
1096          */
1097         function disclaimerLink() {
1098                 return $this->footerLink( 'disclaimers', 'disclaimerpage' );
1099         }
1100
1101         /**
1102          * Return URL options for the 'edit page' link.
1103          * This may include an 'oldid' specifier, if the current page view is such.
1104          *
1105          * @return array
1106          * @private
1107          */
1108         function editUrlOptions() {
1109                 $options = array( 'action' => 'edit' );
1110
1111                 if ( !$this->isRevisionCurrent() ) {
1112                         $options['oldid'] = intval( $this->mRevisionId );
1113                 }
1114
1115                 return $options;
1116         }
1117
1118         function showEmailUser( $id ) {
1119                 global $wgUser;
1120                 $targetUser = User::newFromId( $id );
1121                 return $wgUser->canSendEmail() && # the sending user must have a confirmed email address
1122                         $targetUser->canReceiveEmail(); # the target user must have a confirmed email address and allow emails from users
1123         }
1124
1125         /**
1126          * Return a fully resolved style path url to images or styles stored in the common folder.
1127          * This method returns a url resolved using the configured skin style path
1128          * and includes the style version inside of the url.
1129          * @param $name String: The name or path of a skin resource file
1130          * @return String The fully resolved style path url including styleversion
1131          */
1132         function getCommonStylePath( $name ) {
1133                 global $wgStylePath, $wgStyleVersion;
1134                 return "$wgStylePath/common/$name?$wgStyleVersion";
1135         }
1136
1137         /**
1138          * Return a fully resolved style path url to images or styles stored in the curent skins's folder.
1139          * This method returns a url resolved using the configured skin style path
1140          * and includes the style version inside of the url.
1141          * @param $name String: The name or path of a skin resource file
1142          * @return String The fully resolved style path url including styleversion
1143          */
1144         function getSkinStylePath( $name ) {
1145                 global $wgStylePath, $wgStyleVersion;
1146                 return "$wgStylePath/{$this->stylename}/$name?$wgStyleVersion";
1147         }
1148
1149         /* these are used extensively in SkinTemplate, but also some other places */
1150         static function makeMainPageUrl( $urlaction = '' ) {
1151                 $title = Title::newMainPage();
1152                 self::checkTitle( $title, '' );
1153
1154                 return $title->getLocalURL( $urlaction );
1155         }
1156
1157         static function makeSpecialUrl( $name, $urlaction = '' ) {
1158                 $title = SpecialPage::getTitleFor( $name );
1159                 return $title->getLocalURL( $urlaction );
1160         }
1161
1162         static function makeSpecialUrlSubpage( $name, $subpage, $urlaction = '' ) {
1163                 $title = SpecialPage::getSafeTitleFor( $name, $subpage );
1164                 return $title->getLocalURL( $urlaction );
1165         }
1166
1167         static function makeI18nUrl( $name, $urlaction = '' ) {
1168                 $title = Title::newFromText( wfMsgForContent( $name ) );
1169                 self::checkTitle( $title, $name );
1170                 return $title->getLocalURL( $urlaction );
1171         }
1172
1173         static function makeUrl( $name, $urlaction = '' ) {
1174                 $title = Title::newFromText( $name );
1175                 self::checkTitle( $title, $name );
1176
1177                 return $title->getLocalURL( $urlaction );
1178         }
1179
1180         /**
1181          * If url string starts with http, consider as external URL, else
1182          * internal
1183          */
1184         static function makeInternalOrExternalUrl( $name ) {
1185                 if ( preg_match( '/^(?:' . wfUrlProtocols() . ')/', $name ) ) {
1186                         return $name;
1187                 } else {
1188                         return self::makeUrl( $name );
1189                 }
1190         }
1191
1192         # this can be passed the NS number as defined in Language.php
1193         static function makeNSUrl( $name, $urlaction = '', $namespace = NS_MAIN ) {
1194                 $title = Title::makeTitleSafe( $namespace, $name );
1195                 self::checkTitle( $title, $name );
1196
1197                 return $title->getLocalURL( $urlaction );
1198         }
1199
1200         /* these return an array with the 'href' and boolean 'exists' */
1201         static function makeUrlDetails( $name, $urlaction = '' ) {
1202                 $title = Title::newFromText( $name );
1203                 self::checkTitle( $title, $name );
1204
1205                 return array(
1206                         'href' => $title->getLocalURL( $urlaction ),
1207                         'exists' => $title->getArticleID() != 0,
1208                 );
1209         }
1210
1211         /**
1212          * Make URL details where the article exists (or at least it's convenient to think so)
1213          */
1214         static function makeKnownUrlDetails( $name, $urlaction = '' ) {
1215                 $title = Title::newFromText( $name );
1216                 self::checkTitle( $title, $name );
1217
1218                 return array(
1219                         'href' => $title->getLocalURL( $urlaction ),
1220                         'exists' => true
1221                 );
1222         }
1223
1224         # make sure we have some title to operate on
1225         static function checkTitle( &$title, $name ) {
1226                 if ( !is_object( $title ) ) {
1227                         $title = Title::newFromText( $name );
1228                         if ( !is_object( $title ) ) {
1229                                 $title = Title::newFromText( '--error: link target missing--' );
1230                         }
1231                 }
1232         }
1233
1234         /**
1235          * Build an array that represents the sidebar(s), the navigation bar among them
1236          *
1237          * @return array
1238          */
1239         function buildSidebar() {
1240                 global $parserMemc, $wgEnableSidebarCache, $wgSidebarCacheExpiry;
1241                 global $wgLang;
1242                 wfProfileIn( __METHOD__ );
1243
1244                 $key = wfMemcKey( 'sidebar', $wgLang->getCode() );
1245
1246                 if ( $wgEnableSidebarCache ) {
1247                         $cachedsidebar = $parserMemc->get( $key );
1248                         if ( $cachedsidebar ) {
1249                                 wfProfileOut( __METHOD__ );
1250                                 return $cachedsidebar;
1251                         }
1252                 }
1253
1254                 $bar = array();
1255                 $this->addToSidebar( $bar, 'sidebar' );
1256
1257                 wfRunHooks( 'SkinBuildSidebar', array( $this, &$bar ) );
1258                 if ( $wgEnableSidebarCache ) {
1259                         $parserMemc->set( $key, $bar, $wgSidebarCacheExpiry );
1260                 }
1261
1262                 wfProfileOut( __METHOD__ );
1263                 return $bar;
1264         }
1265         /**
1266          * Add content from a sidebar system message
1267          * Currently only used for MediaWiki:Sidebar (but may be used by Extensions)
1268          *
1269          * This is just a wrapper around addToSidebarPlain() for backwards compatibility
1270          *
1271          * @param &$bar array
1272          * @param $message String
1273          */
1274         function addToSidebar( &$bar, $message ) {
1275                 $this->addToSidebarPlain( $bar, wfMsgForContentNoTrans( $message ) );
1276         }
1277
1278         /**
1279          * Add content from plain text
1280          * @since 1.17
1281          * @param &$bar array
1282          * @param $text string
1283          */
1284         function addToSidebarPlain( &$bar, $text ) {
1285                 $lines = explode( "\n", $text );
1286                 $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.
1287
1288                 $heading = '';
1289
1290                 foreach ( $lines as $line ) {
1291                         if ( strpos( $line, '*' ) !== 0 ) {
1292                                 continue;
1293                         }
1294
1295                         if ( strpos( $line, '**' ) !== 0 ) {
1296                                 $heading = trim( $line, '* ' );
1297                                 if ( !array_key_exists( $heading, $bar ) ) {
1298                                         $bar[$heading] = array();
1299                                 }
1300                         } else {
1301                                 $line = trim( $line, '* ' );
1302
1303                                 if ( strpos( $line, '|' ) !== false ) { // sanity check
1304                                         $line = MessageCache::singleton()->transform( $line, false, null, $this->mTitle );
1305                                         $line = array_map( 'trim', explode( '|', $line, 2 ) );
1306                                         $link = wfMsgForContent( $line[0] );
1307
1308                                         if ( $link == '-' ) {
1309                                                 continue;
1310                                         }
1311
1312                                         $text = wfMsgExt( $line[1], 'parsemag' );
1313
1314                                         if ( wfEmptyMsg( $line[1] ) ) {
1315                                                 $text = $line[1];
1316                                         }
1317
1318                                         if ( wfEmptyMsg( $line[0] ) ) {
1319                                                 $link = $line[0];
1320                                         }
1321
1322                                         if ( preg_match( '/^(?:' . wfUrlProtocols() . ')/', $link ) ) {
1323                                                 $href = $link;
1324                                         } else {
1325                                                 $title = Title::newFromText( $link );
1326
1327                                                 if ( $title ) {
1328                                                         $title = $title->fixSpecialName();
1329                                                         $href = $title->getLocalURL();
1330                                                 } else {
1331                                                         $href = 'INVALID-TITLE';
1332                                                 }
1333                                         }
1334
1335                                         $bar[$heading][] = array(
1336                                                 'text' => $text,
1337                                                 'href' => $href,
1338                                                 'id' => 'n-' . strtr( $line[1], ' ', '-' ),
1339                                                 'active' => false
1340                                         );
1341                                 } else if ( ( substr( $line, 0, 2 ) == '{{' ) && ( substr( $line, -2 ) == '}}' ) ) {
1342                                         global $wgParser;
1343
1344                                         $line = substr( $line, 2, strlen( $line ) - 4 );
1345
1346                                         $options = new ParserOptions();
1347                                         $options->setEditSection( false );
1348                                         $options->setInterfaceMessage( true );
1349                                         $wikiBar[$heading] = $wgParser->parse( wfMsgForContentNoTrans( $line ) , $this->mTitle, $options )->getText();
1350                                 } else {
1351                                         continue;
1352                                 }
1353                         }
1354                 }
1355
1356                 if ( count( $wikiBar ) > 0 ) {
1357                         $bar = array_merge( $bar, $wikiBar );
1358                 }
1359
1360                 return $bar;
1361         }
1362
1363         /**
1364          * Should we include common/wikiprintable.css?  Skins that have their own
1365          * print stylesheet should override this and return false.  (This is an
1366          * ugly hack to get Monobook to play nicely with
1367          * OutputPage::headElement().)
1368          *
1369          * @return bool
1370          */
1371         public function commonPrintStylesheet() {
1372                 return true;
1373         }
1374
1375         /**
1376          * Gets new talk page messages for the current user.
1377          * @return MediaWiki message or if no new talk page messages, nothing
1378          * The format without an explicit $out argument is deprecated
1379          */
1380         function getNewtalks( OutputPage $out=null ) {
1381                 global $wgUser;
1382
1383                 if ( is_null( $out ) ) {
1384                         // Backwards compatibility for when there was no $out arg
1385                         global $wgOut;
1386                         $out = $wgOut;
1387                 }
1388
1389                 $newtalks = $wgUser->getNewMessageLinks();
1390                 $ntl = '';
1391
1392                 if ( count( $newtalks ) == 1 && $newtalks[0]['wiki'] === wfWikiID() ) {
1393                         $userTitle = $this->mUser->getUserPage();
1394                         $userTalkTitle = $userTitle->getTalkPage();
1395
1396                         if ( !$userTalkTitle->equals( $out->getTitle() ) ) {
1397                                 $newMessagesLink = $this->link(
1398                                         $userTalkTitle,
1399                                         wfMsgHtml( 'newmessageslink' ),
1400                                         array(),
1401                                         array( 'redirect' => 'no' ),
1402                                         array( 'known', 'noclasses' )
1403                                 );
1404
1405                                 $newMessagesDiffLink = $this->link(
1406                                         $userTalkTitle,
1407                                         wfMsgHtml( 'newmessagesdifflink' ),
1408                                         array(),
1409                                         array( 'diff' => 'cur' ),
1410                                         array( 'known', 'noclasses' )
1411                                 );
1412
1413                                 $ntl = wfMsg(
1414                                         'youhavenewmessages',
1415                                         $newMessagesLink,
1416                                         $newMessagesDiffLink
1417                                 );
1418                                 # Disable Squid cache
1419                                 $out->setSquidMaxage( 0 );
1420                         }
1421                 } elseif ( count( $newtalks ) ) {
1422                         // _>" " for BC <= 1.16
1423                         $sep = str_replace( '_', ' ', wfMsgHtml( 'newtalkseparator' ) );
1424                         $msgs = array();
1425
1426                         foreach ( $newtalks as $newtalk ) {
1427                                 $msgs[] = Xml::element(
1428                                         'a',
1429                                         array( 'href' => $newtalk['link'] ), $newtalk['wiki']
1430                                 );
1431                         }
1432                         $parts = implode( $sep, $msgs );
1433                         $ntl = wfMsgHtml( 'youhavenewmessagesmulti', $parts );
1434                         $out->setSquidMaxage( 0 );
1435                 }
1436
1437                 return $ntl;
1438         }
1439
1440         /**
1441          * Get a cached notice
1442          *
1443          * @param $name String: message name, or 'default' for $wgSiteNotice
1444          * @return String: HTML fragment
1445          */
1446         private function getCachedNotice( $name ) {
1447                 global $wgOut, $wgRenderHashAppend, $parserMemc;
1448
1449                 wfProfileIn( __METHOD__ );
1450
1451                 $needParse = false;
1452
1453                 if( $name === 'default' ) {
1454                         // special case
1455                         global $wgSiteNotice;
1456                         $notice = $wgSiteNotice;
1457                         if( empty( $notice ) ) {
1458                                 wfProfileOut( __METHOD__ );
1459                                 return false;
1460                         }
1461                 } else {
1462                         $msg = wfMessage( $name )->inContentLanguage();
1463                         if( $msg->isDisabled() ) {
1464                                 wfProfileOut( __METHOD__ );
1465                                 return false;
1466                         }
1467                         $notice = $msg->plain();
1468                 }
1469
1470                 // Use the extra hash appender to let eg SSL variants separately cache.
1471                 $key = wfMemcKey( $name . $wgRenderHashAppend );
1472                 $cachedNotice = $parserMemc->get( $key );
1473                 if( is_array( $cachedNotice ) ) {
1474                         if( md5( $notice ) == $cachedNotice['hash'] ) {
1475                                 $notice = $cachedNotice['html'];
1476                         } else {
1477                                 $needParse = true;
1478                         }
1479                 } else {
1480                         $needParse = true;
1481                 }
1482
1483                 if ( $needParse ) {
1484                         if( is_object( $wgOut ) ) {
1485                                 $parsed = $wgOut->parse( $notice );
1486                                 $parserMemc->set( $key, array( 'html' => $parsed, 'hash' => md5( $notice ) ), 600 );
1487                                 $notice = $parsed;
1488                         } else {
1489                                 wfDebug( 'Skin::getCachedNotice called for ' . $name . ' with no $wgOut available' . "\n" );
1490                                 $notice = '';
1491                         }
1492                 }
1493
1494                 $notice = '<div id="localNotice">' .$notice . '</div>';
1495                 wfProfileOut( __METHOD__ );
1496                 return $notice;
1497         }
1498
1499         /**
1500          * Get a notice based on page's namespace
1501          *
1502          * @return String: HTML fragment
1503          */
1504         function getNamespaceNotice() {
1505                 wfProfileIn( __METHOD__ );
1506
1507                 $key = 'namespacenotice-' . $this->mTitle->getNsText();
1508                 $namespaceNotice = $this->getCachedNotice( $key );
1509                 if ( $namespaceNotice && substr( $namespaceNotice, 0, 7 ) != '<p>&lt;' ) {
1510                         $namespaceNotice = '<div id="namespacebanner">' . $namespaceNotice . '</div>';
1511                 } else {
1512                         $namespaceNotice = '';
1513                 }
1514
1515                 wfProfileOut( __METHOD__ );
1516                 return $namespaceNotice;
1517         }
1518
1519         /**
1520          * Get the site notice
1521          *
1522          * @return String: HTML fragment
1523          */
1524         function getSiteNotice() {
1525                 global $wgUser;
1526
1527                 wfProfileIn( __METHOD__ );
1528                 $siteNotice = '';
1529
1530                 if ( wfRunHooks( 'SiteNoticeBefore', array( &$siteNotice, $this ) ) ) {
1531                         if ( is_object( $wgUser ) && $wgUser->isLoggedIn() ) {
1532                                 $siteNotice = $this->getCachedNotice( 'sitenotice' );
1533                         } else {
1534                                 $anonNotice = $this->getCachedNotice( 'anonnotice' );
1535                                 if ( !$anonNotice ) {
1536                                         $siteNotice = $this->getCachedNotice( 'sitenotice' );
1537                                 } else {
1538                                         $siteNotice = $anonNotice;
1539                                 }
1540                         }
1541                         if ( !$siteNotice ) {
1542                                 $siteNotice = $this->getCachedNotice( 'default' );
1543                         }
1544                 }
1545
1546                 wfRunHooks( 'SiteNoticeAfter', array( &$siteNotice, $this ) );
1547                 wfProfileOut( __METHOD__ );
1548                 return $siteNotice;
1549         }
1550
1551         /**
1552          * Create a section edit link.  This supersedes editSectionLink() and
1553          * editSectionLinkForOther().
1554          *
1555          * @param $nt      Title  The title being linked to (may not be the same as
1556          *   $wgTitle, if the section is included from a template)
1557          * @param $section string The designation of the section being pointed to,
1558          *   to be included in the link, like "&section=$section"
1559          * @param $tooltip string The tooltip to use for the link: will be escaped
1560          *   and wrapped in the 'editsectionhint' message
1561          * @param $lang    string Language code
1562          * @return         string HTML to use for edit link
1563          */
1564         public function doEditSectionLink( Title $nt, $section, $tooltip = null, $lang = false ) {
1565                 // HTML generated here should probably have userlangattributes
1566                 // added to it for LTR text on RTL pages
1567                 $attribs = array();
1568                 if ( !is_null( $tooltip ) ) {
1569                         # Bug 25462: undo double-escaping.
1570                         $tooltip = Sanitizer::decodeCharReferences( $tooltip );
1571                         $attribs['title'] = wfMsgReal( 'editsectionhint', array( $tooltip ), true, $lang );
1572                 }
1573                 $link = Linker::link( $nt, wfMsgExt( 'editsection', array( 'language' => $lang ) ),
1574                         $attribs,
1575                         array( 'action' => 'edit', 'section' => $section ),
1576                         array( 'noclasses', 'known' )
1577                 );
1578
1579                 # Run the old hook.  This takes up half of the function . . . hopefully
1580                 # we can rid of it someday.
1581                 $attribs = '';
1582                 if ( $tooltip ) {
1583                         $attribs = htmlspecialchars( wfMsgReal( 'editsectionhint', array( $tooltip ), true, $lang ) );
1584                         $attribs = " title=\"$attribs\"";
1585                 }
1586                 $result = null;
1587                 wfRunHooks( 'EditSectionLink', array( &$this, $nt, $section, $attribs, $link, &$result, $lang ) );
1588                 if ( !is_null( $result ) ) {
1589                         # For reverse compatibility, add the brackets *after* the hook is
1590                         # run, and even add them to hook-provided text.  (This is the main
1591                         # reason that the EditSectionLink hook is deprecated in favor of
1592                         # DoEditSectionLink: it can't change the brackets or the span.)
1593                         $result = wfMsgExt( 'editsection-brackets', array( 'escape', 'replaceafter', 'language' => $lang ), $result );
1594                         return "<span class=\"editsection\">$result</span>";
1595                 }
1596
1597                 # Add the brackets and the span, and *then* run the nice new hook, with
1598                 # clean and non-redundant arguments.
1599                 $result = wfMsgExt( 'editsection-brackets', array( 'escape', 'replaceafter', 'language' => $lang ), $link );
1600                 $result = "<span class=\"editsection\">$result</span>";
1601
1602                 wfRunHooks( 'DoEditSectionLink', array( $this, $nt, $section, $tooltip, &$result, $lang ) );
1603                 return $result;
1604         }
1605
1606         /**
1607          * Use PHP's magic __call handler to intercept legacy calls to the linker
1608          * for backwards compatibility.
1609          *
1610          * @param $fname String Name of called method
1611          * @param $args Array Arguments to the method
1612          */
1613         function __call( $fname, $args ) {
1614                 if ( method_exists( 'Linker', $fname ) ) {
1615                         return call_user_func_array( array( 'Linker', $fname ), $args );
1616                 } else {
1617                         $className = get_class( $this );
1618                         throw new MWException( "Call to undefined method $className::$fName" );
1619                 }
1620         }
1621
1622 }