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 157                                 # is no longer valid.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