includes/Skin.php

   1 <?php
   2 /**
   3  * @defgroup Skins Skins
   4  */
   5
   6 if ( !defined( 'MEDIAWIKI' ) ) {
   7         die( 1 );
   8 }
   9
  10 /**
  11  * The main skin class that provide methods and properties for all other skins.
  12  * This base class is also the "Standard" skin.
  13  *
  14  * See docs/skin.txt for more information.
  15  *
  16  * @ingroup Skins
  17  */
  18 abstract class Skin {
  19         /**#@+
  20          * @private
  21          */
  22         var $mWatchLinkNum = 0; // Appended to end of watch link id's
  23         /**#@-*/
  24         protected $mRevisionId; // The revision ID we're looking at, null if not applicable.
  25         protected $skinname = 'standard';
  26         protected $mRelevantTitle = null;
  27         protected $mRelevantUser = null;
  28
  29         /**
  30          * Fetch the set of available skins.
  31          * @return array of strings
  32          */
  33         static function getSkinNames() {
  34                 global $wgValidSkinNames;
  35                 static $skinsInitialised = false;
  36
  37                 if ( !$skinsInitialised || !count( $wgValidSkinNames ) ) {
  38                         # Get a list of available skins
  39                         # Build using the regular expression '^(.*).php$'
  40                         # Array keys are all lower case, array value keep the case used by filename
  41                         #
  42                         wfProfileIn( __METHOD__ . '-init' );
  43
  44                         global $wgStyleDirectory;
  45
  46                         $skinDir = dir( $wgStyleDirectory );
  47
  48                         # while code from www.php.net
  49                         while ( false !== ( $file = $skinDir->read() ) ) {
  50                                 // Skip non-PHP files, hidden files, and '.dep' includes
  51                                 $matches = array();
  52
  53                                 if ( preg_match( '/^([^.]*)\.php$/', $file, $matches ) ) {
  54                                         $aSkin = $matches[1];
  55                                         $wgValidSkinNames[strtolower( $aSkin )] = $aSkin;
  56                                 }
  57                         }
  58                         $skinDir->close();
  59                         $skinsInitialised = true;
  60                         wfProfileOut( __METHOD__ . '-init' );
  61                 }
  62                 return $wgValidSkinNames;
  63         }
  64
  65         /**
  66          * Fetch the list of usable skins in regards to $wgSkipSkins.
  67          * Useful for Special:Preferences and other places where you
  68          * only want to show skins users _can_ use.
  69          * @return array of strings
  70          */
  71         public static function getUsableSkins() {
  72                 global $wgSkipSkins;
  73
  74                 $usableSkins = self::getSkinNames();
  75
  76                 foreach ( $wgSkipSkins as $skip ) {
  77                         unset( $usableSkins[$skip] );
  78                 }
  79
  80                 return $usableSkins;
  81         }
  82
  83         /**
  84          * Normalize a skin preference value to a form that can be loaded.
  85          * If a skin can't be found, it will fall back to the configured
  86          * default (or the old 'Classic' skin if that's broken).
  87          * @param $key String: 'monobook', 'standard', etc.
  88          * @return string
  89          */
  90         static function normalizeKey( $key ) {
  91                 global $wgDefaultSkin;
  92
  93                 $skinNames = Skin::getSkinNames();
  94
  95                 if ( $key == '' ) {
  96                         // Don't return the default immediately;
  97                         // in a misconfiguration we need to fall back.
  98                         $key = $wgDefaultSkin;
  99                 }
 100
 101                 if ( isset( $skinNames[$key] ) ) {
 102                         return $key;
 103                 }
 104
 105                 // Older versions of the software used a numeric setting
 106                 // in the user preferences.
 107                 $fallback = array(
 108                         0 => $wgDefaultSkin,
 109                         1 => 'nostalgia',
 110                         2 => 'cologneblue'
 111                 );
 112
 113                 if ( isset( $fallback[$key] ) ) {
 114                         $key = $fallback[$key];
 115                 }
 116
 117                 if ( isset( $skinNames[$key] ) ) {
 118                         return $key;
 119                 } else if ( isset( $skinNames[$wgDefaultSkin] ) ) {
 120                         return $wgDefaultSkin;
 121                 } else {
 122                         return 'vector';
 123                 }
 124         }
 125
 126         /**
 127          * Factory method for loading a skin of a given type
 128          * @param $key String: 'monobook', 'standard', etc.
 129          * @return Skin
 130          */
 131         static function &newFromKey( $key ) {
 132                 global $wgStyleDirectory;
 133
 134                 $key = Skin::normalizeKey( $key );
 135
 136                 $skinNames = Skin::getSkinNames();
 137                 $skinName = $skinNames[$key];
 138                 $className = "Skin{$skinName}";
 139
 140                 # Grab the skin class and initialise it.
 141                 if ( !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 = $this->getContext()->getUser();
 194
 195                 // User/talk link
 196                 $titles = array( $user->getUserPage(), $user->getTalkPage() );
 197
 198                 // Other tab link
 199                 if ( $this->getTitle()->getNamespace() == NS_SPECIAL ) {
 200                         // nothing
 201                 } elseif ( $this->getTitle()->isTalkPage() ) {
 202                         $titles[] = $this->getTitle()->getSubjectPage();
 203                 } else {
 204                         $titles[] = $this->getTitle()->getTalkPage();
 205                 }
 206
 207                 $lb = new LinkBatch( $titles );
 208                 $lb->setCaller( __METHOD__ );
 209                 $lb->execute();
 210         }
 211
 212         /**
 213          * Set some local variables
 214          */
 215         protected function setMembers() {
 216                 $this->userpage = $this->getContext()->getUser()->getUserPage()->getPrefixedText();
 217                 $this->usercss = false;
 218         }
 219
 220         /**
 221          * Whether the revision displayed is the latest revision of the page
 222          *
 223          * @return Boolean
 224          */
 225         public function isRevisionCurrent() {
 226                 return $this->mRevisionId == 0 || $this->mRevisionId == $this->getTitle()->getLatestRevID();
 227         }
 228
 229         /**
 230          * Set the RequestContext used in this instance
 231          *
 232          * @param RequestContext $context
 233          */
 234         public function setContext( RequestContext $context ) {
 235                 $this->mContext = $context;
 236         }
 237
 238         /**
 239          * Get the RequestContext used in this instance
 240          *
 241          * @return RequestContext
 242          */
 243         public function getContext() {
 244                 if ( !isset($this->mContext) ) {
 245                         wfDebug( __METHOD__ . " called and \$mContext is null. Using RequestContext::getMain(); for sanity\n" );
 246                         $this->mContext = RequestContext::getMain();
 247                 }
 248                 return $this->mContext;
 249         }
 250
 251         /** Get the title
 252          *
 253          * @return Title
 254          */
 255         public function getTitle() {
 256                 return $this->getContext()->getTitle();
 257         }
 258
 259         /** Get the user
 260          *
 261          * @return User
 262          */
 263         public function getUser() {
 264                 return $this->getContext()->getUser();
 265         }
 266
 267         /**
 268          * Set the "relevant" title
 269          * @see self::getRelevantTitle()
 270          * @param $t Title object to use
 271          */
 272         public function setRelevantTitle( $t ) {
 273                 $this->mRelevantTitle = $t;
 274         }
 275
 276         /**
 277          * Return the "relevant" title.
 278          * A "relevant" title is not necessarily the actual title of the page.
 279          * Special pages like Special:MovePage use set the page they are acting on
 280          * as their "relevant" title, this allows the skin system to display things
 281          * such as content tabs which belong to to that page instead of displaying
 282          * a basic special page tab which has almost no meaning.
 283          */
 284         public function getRelevantTitle() {
 285                 if ( isset($this->mRelevantTitle) ) {
 286                         return $this->mRelevantTitle;
 287                 }
 288                 return $this->getTitle();
 289         }
 290
 291         /**
 292          * Set the "relevant" user
 293          * @see self::getRelevantUser()
 294          * @param $u User object to use
 295          */
 296         public function setRelevantUser( $u ) {
 297                 $this->mRelevantUser = $u;
 298         }
 299
 300         /**
 301          * Return the "relevant" user.
 302          * A "relevant" user is similar to a relevant title. Special pages like
 303          * Special:Contributions mark the user which they are relevant to so that
 304          * things like the toolbox can display the information they usually are only
 305          * able to display on a user's userpage and talkpage.
 306          */
 307         public function getRelevantUser() {
 308                 if ( isset($this->mRelevantUser) ) {
 309                         return $this->mRelevantUser;
 310                 }
 311                 $title = $this->getRelevantTitle();
 312                 if( $title->getNamespace() == NS_USER || $title->getNamespace() == NS_USER_TALK ) {
 313                         $rootUser = strtok( $title->getText(), '/' );
 314                         if ( User::isIP( $rootUser ) ) {
 315                                 $this->mRelevantUser = User::newFromName( $rootUser, false );
 316                         } else {
 317                                 $user = User::newFromName( $rootUser );
 318                                 if ( $user->isLoggedIn() ) {
 319                                         $this->mRelevantUser = $user;
 320                                 }
 321                         }
 322                         return $this->mRelevantUser;
 323                 }
 324                 return null;
 325         }
 326
 327         /**
 328          * Outputs the HTML generated by other functions.
 329          * @param $out Object: instance of OutputPage
 330          */
 331         abstract function outputPage( OutputPage $out );
 332
 333         static function makeVariablesScript( $data ) {
 334                 if ( $data ) {
 335                         return Html::inlineScript(
 336                                 ResourceLoader::makeLoaderConditionalScript( ResourceLoader::makeConfigSetScript( $data ) )
 337                         );
 338                 } else {
 339                         return '';
 340                 }
 341         }
 342
 343         /**
 344          * To make it harder for someone to slip a user a fake
 345          * user-JavaScript or user-CSS preview, a random token
 346          * is associated with the login session. If it's not
 347          * passed back with the preview request, we won't render
 348          * the code.
 349          *
 350          * @param $action String: 'edit', 'submit' etc.
 351          * @return bool
 352          */
 353         public function userCanPreview( $action ) {
 354                 if ( $action != 'submit' ) {
 355                         return false;
 356                 }
 357                 if ( !$this->getContext()->getRequest()->wasPosted() ) {
 358                         return false;
 359                 }
 360                 if ( !$this->getTitle()->userCanEditCssSubpage() ) {
 361                         return false;
 362                 }
 363                 if ( !$this->getTitle()->userCanEditJsSubpage() ) {
 364                         return false;
 365                 }
 366
 367                 return $this->getContext()->getUser()->matchEditToken(
 368                         $this->getContext()->getRequest()->getVal( 'wpEditToken' ) );
 369         }
 370
 371         /**
 372          * Generated JavaScript action=raw&gen=js
 373          * This returns MediaWiki:Common.js and MediaWiki:[Skinname].js concate-
 374          * nated together.  For some bizarre reason, it does *not* return any
 375          * custom user JS from subpages.  Huh?
 376          *
 377          * There's absolutely no reason to have separate Monobook/Common JSes.
 378          * Any JS that cares can just check the skin variable generated at the
 379          * top.  For now Monobook.js will be maintained, but it should be consi-
 380          * dered deprecated.
 381          *
 382          * @param $skinName String: If set, overrides the skin name
 383          * @return string
 384          */
 385         public function generateUserJs( $skinName = null ) {
 386
 387                 // Stub - see ResourceLoaderSiteModule, CologneBlue, Simple and Standard skins override this
 388
 389                 return '';
 390         }
 391
 392         /**
 393          * Generate user stylesheet for action=raw&gen=css
 394          */
 395         public function generateUserStylesheet() {
 396
 397                 // Stub - see ResourceLoaderUserModule, CologneBlue, Simple and Standard skins override this
 398
 399                 return '';
 400         }
 401
 402         /**
 403          * Split for easier subclassing in SkinSimple, SkinStandard and SkinCologneBlue
 404          * Anything in here won't be generated if $wgAllowUserCssPrefs is false.
 405          */
 406         protected function reallyGenerateUserStylesheet() {
 407
 408                 // Stub - see  ResourceLoaderUserModule, CologneBlue, Simple and Standard skins override this
 409
 410                 return '';
 411         }
 412
 413         /**
 414          * @private
 415          */
 416         function setupUserCss( OutputPage $out ) {
 417                 global $wgUseSiteCss, $wgAllowUserCss, $wgAllowUserCssPrefs;
 418
 419                 wfProfileIn( __METHOD__ );
 420
 421                 $this->setupSkinUserCss( $out );
 422                 // Add any extension CSS
 423                 foreach ( $out->getExtStyle() as $url ) {
 424                         $out->addStyle( $url );
 425                 }
 426
 427                 // Per-site custom styles
 428                 if ( $wgUseSiteCss ) {
 429                         $out->addModuleStyles( array( 'site', 'noscript' ) );
 430                         if( $this->getContext()->getUser()->isLoggedIn() ){
 431                                 $out->addModuleStyles( 'user.groups' );
 432                         }
 433                 }
 434
 435                 // Per-user custom styles
 436                 if ( $wgAllowUserCss ) {
 437                         if ( $this->getTitle()->isCssSubpage() && $this->userCanPreview( $this->getContext()->getRequest()->getVal( 'action' ) ) ) {
 438                                 // @FIXME: properly escape the cdata!
 439                                 $out->addInlineStyle( $this->getContext()->getRequest()->getText( 'wpTextbox1' ) );
 440                         } else {
 441                                 $out->addModuleStyles( 'user' );
 442                         }
 443                 }
 444
 445                 // Per-user preference styles
 446                 if ( $wgAllowUserCssPrefs ) {
 447                         $out->addModuleStyles( 'user.options' );
 448                 }
 449
 450                 wfProfileOut( __METHOD__ );
 451         }
 452
 453         /**
 454          * Get the query to generate a dynamic stylesheet
 455          *
 456          * @return array
 457          */
 458         public static function getDynamicStylesheetQuery() {
 459                 global $wgSquidMaxage;
 460
 461                 return array(
 462                                 'action' => 'raw',
 463                                 'maxage' => $wgSquidMaxage,
 464                                 'usemsgcache' => 'yes',
 465                                 'ctype' => 'text/css',
 466                                 'smaxage' => $wgSquidMaxage,
 467                         );
 468         }
 469
 470         /**
 471          * Add skin specific stylesheets
 472          * @param $out OutputPage
 473          * @delete
 474          */
 475         abstract function setupSkinUserCss( OutputPage $out );
 476
 477         function getPageClasses( $title ) {
 478                 $numeric = 'ns-' . $title->getNamespace();
 479
 480                 if ( $title->getNamespace() == NS_SPECIAL ) {
 481                         $type = 'ns-special';
 482                         // bug 23315: provide a class based on the canonical special page name without subpages
 483                         list( $canonicalName ) = SpecialPage::resolveAliasWithSubpage( $title->getDBkey() );
 484                         if ( $canonicalName ) {
 485                                 $type .= ' ' . Sanitizer::escapeClass( "mw-special-$canonicalName" );
 486                         } else {
 487                                 $type .= ' mw-invalidspecialpage';
 488                         }
 489                 } elseif ( $title->isTalkPage() ) {
 490                         $type = 'ns-talk';
 491                 } else {
 492                         $type = 'ns-subject';
 493                 }
 494
 495                 $name = Sanitizer::escapeClass( 'page-' . $title->getPrefixedText() );
 496
 497                 return "$numeric $type $name";
 498         }
 499
 500         /**
 501          * This will be called by OutputPage::headElement when it is creating the
 502          * <body> tag, skins can override it if they have a need to add in any
 503          * body attributes or classes of their own.
 504          */
 505         function addToBodyAttributes( $out, &$bodyAttrs ) {
 506                 // does nothing by default
 507         }
 508
 509         /**
 510          * URL to the logo
 511          */
 512         function getLogo() {
 513                 global $wgLogo;
 514                 return $wgLogo;
 515         }
 516
 517         /**
 518          * The format without an explicit $out argument is deprecated
 519          */
 520         function getCategoryLinks( OutputPage $out=null ) {
 521                 global $wgUseCategoryBrowser, $wgContLang;
 522
 523                 if ( count( $out->mCategoryLinks ) == 0 ) {
 524                         return '';
 525                 }
 526
 527                 # Separator
 528                 $sep = wfMsgExt( 'catseparator', array( 'parsemag', 'escapenoentities' ) );
 529
 530                 // Use Unicode bidi embedding override characters,
 531                 // to make sure links don't smash each other up in ugly ways.
 532                 $dir = $wgContLang->getDir();
 533                 $embed = "<span dir='$dir'>";
 534                 $pop = '</span>';
 535
 536                 $allCats = $out->getCategoryLinks();
 537                 $s = '';
 538                 $colon = wfMsgExt( 'colon-separator', 'escapenoentities' );
 539
 540                 if ( !empty( $allCats['normal'] ) ) {
 541                         $t = $embed . implode( "{$pop} {$sep} {$embed}" , $allCats['normal'] ) . $pop;
 542
 543                         $msg = wfMsgExt( 'pagecategories', array( 'parsemag', 'escapenoentities' ), count( $allCats['normal'] ) );
 544                         $s .= '<div id="mw-normal-catlinks">' .
 545                                 $this->link( Title::newFromText( wfMsgForContent( 'pagecategorieslink' ) ), $msg )
 546                                 . $colon . $t . '</div>';
 547                 }
 548
 549                 # Hidden categories
 550                 if ( isset( $allCats['hidden'] ) ) {
 551                         if ( $this->getContext()->getUser()->getBoolOption( 'showhiddencats' ) ) {
 552                                 $class = 'mw-hidden-cats-user-shown';
 553                         } elseif ( $this->getTitle()->getNamespace() == NS_CATEGORY ) {
 554                                 $class = 'mw-hidden-cats-ns-shown';
 555                         } else {
 556                                 $class = 'mw-hidden-cats-hidden';
 557                         }
 558
 559                         $s .= "<div id=\"mw-hidden-catlinks\" class=\"$class\">" .
 560                                 wfMsgExt( 'hidden-categories', array( 'parsemag', 'escapenoentities' ), count( $allCats['hidden'] ) ) .
 561                                 $colon . $embed . implode( "$pop $sep $embed", $allCats['hidden'] ) . $pop .
 562                                 '</div>';
 563                 }
 564
 565                 # optional 'dmoz-like' category browser. Will be shown under the list
 566                 # of categories an article belong to
 567                 if ( $wgUseCategoryBrowser ) {
 568                         $s .= '<br /><hr />';
 569
 570                         # get a big array of the parents tree
 571                         $parenttree = $this->getTitle()->getParentCategoryTree();
 572                         # Skin object passed by reference cause it can not be
 573                         # accessed under the method subfunction drawCategoryBrowser
 574                         $tempout = explode( "\n", $this->drawCategoryBrowser( $parenttree, $this ) );
 575                         # Clean out bogus first entry and sort them
 576                         unset( $tempout[0] );
 577                         asort( $tempout );
 578                         # Output one per line
 579                         $s .= implode( "<br />\n", $tempout );
 580                 }
 581
 582                 return $s;
 583         }
 584
 585         /**
 586          * Render the array as a serie of links.
 587          * @param $tree Array: categories tree returned by Title::getParentCategoryTree
 588          * @param &skin Object: skin passed by reference
 589          * @return String separated by &gt;, terminate with "\n"
 590          */
 591         function drawCategoryBrowser( $tree, &$skin ) {
 592                 $return = '';
 593
 594                 foreach ( $tree as $element => $parent ) {
 595                         if ( empty( $parent ) ) {
 596                                 # element start a new list
 597                                 $return .= "\n";
 598                         } else {
 599                                 # grab the others elements
 600                                 $return .= $this->drawCategoryBrowser( $parent, $skin ) . ' &gt; ';
 601                         }
 602
 603                         # add our current element to the list
 604                         $eltitle = Title::newFromText( $element );
 605                         $return .=  $skin->link( $eltitle, $eltitle->getText() );
 606                 }
 607
 608                 return $return;
 609         }
 610
 611         /**
 612          * The ->getCategories() form is deprecated, please instead use
 613          * the ->getCategories( $out ) form with whatout OutputPage is on hand
 614          */
 615         function getCategories( OutputPage $out=null ) {
 616
 617                 $catlinks = $this->getCategoryLinks( $out );
 618
 619                 $classes = 'catlinks';
 620
 621                 // Check what we're showing
 622                 $allCats = $out->getCategoryLinks();
 623                 $showHidden = $this->getContext()->getUser()->getBoolOption( 'showhiddencats' ) ||
 624                                                 $this->getTitle()->getNamespace() == NS_CATEGORY;
 625
 626                 if ( empty( $allCats['normal'] ) && !( !empty( $allCats['hidden'] ) && $showHidden ) ) {
 627                         $classes .= ' catlinks-allhidden';
 628                 }
 629
 630                 return "<div id='catlinks' class='$classes'>{$catlinks}</div>";
 631         }
 632
 633         /**
 634          * This runs a hook to allow extensions placing their stuff after content
 635          * and article metadata (e.g. categories).
 636          * Note: This function has nothing to do with afterContent().
 637          *
 638          * This hook is placed here in order to allow using the same hook for all
 639          * skins, both the SkinTemplate based ones and the older ones, which directly
 640          * use this class to get their data.
 641          *
 642          * The output of this function gets processed in SkinTemplate::outputPage() for
 643          * the SkinTemplate based skins, all other skins should directly echo it.
 644          *
 645          * Returns an empty string by default, if not changed by any hook function.
 646          */
 647         protected function afterContentHook() {
 648                 $data = '';
 649
 650                 if ( wfRunHooks( 'SkinAfterContent', array( &$data, $this ) ) ) {
 651                         // adding just some spaces shouldn't toggle the output
 652                         // of the whole <div/>, so we use trim() here
 653                         if ( trim( $data ) != '' ) {
 654                                 // Doing this here instead of in the skins to
 655                                 // ensure that the div has the same ID in all
 656                                 // skins
 657                                 $data = "<div id='mw-data-after-content'>\n" .
 658                                         "\t$data\n" .
 659                                         "</div>\n";
 660                         }
 661                 } else {
 662                         wfDebug( "Hook SkinAfterContent changed output processing.\n" );
 663                 }
 664
 665                 return $data;
 666         }
 667
 668         /**
 669          * Generate debug data HTML for displaying at the bottom of the main content
 670          * area.
 671          * @return String HTML containing debug data, if enabled (otherwise empty).
 672          */
 673         protected function generateDebugHTML( OutputPage $out ) {
 674                 global $wgShowDebug;
 675
 676                 if ( $wgShowDebug ) {
 677                         $listInternals = $this->formatDebugHTML( $out->mDebugtext );
 678                         return "\n<hr />\n<strong>Debug data:</strong><ul id=\"mw-debug-html\">" .
 679                                 $listInternals . "</ul>\n";
 680                 }
 681
 682                 return '';
 683         }
 684
 685         private function formatDebugHTML( $debugText ) {
 686                 global $wgDebugTimestamps;
 687
 688                 $lines = explode( "\n", $debugText );
 689                 $curIdent = 0;
 690                 $ret = '<li>';
 691
 692                 foreach ( $lines as $line ) {
 693                         $pre = '';
 694                         if ( $wgDebugTimestamps ) {
 695                                 $matches = array();
 696                                 if ( preg_match( '/^(\d+\.\d+\s{2})/', $line, $matches ) ) {
 697                                         $pre = $matches[1];
 698                                         $line = substr( $line, strlen( $pre ) );
 699                                 }
 700                         }
 701                         $display = ltrim( $line );
 702                         $ident = strlen( $line ) - strlen( $display );
 703                         $diff = $ident - $curIdent;
 704
 705                         $display = $pre . $display;
 706                         if ( $display == '' ) {
 707                                 $display = "\xc2\xa0";
 708                         }
 709
 710                         if ( !$ident && $diff < 0 && substr( $display, 0, 9 ) != 'Entering ' && substr( $display, 0, 8 ) != 'Exiting ' ) {
 711                                 $ident = $curIdent;
 712                                 $diff = 0;
 713                                 $display = '<span style="background:yellow;">' . htmlspecialchars( $display ) . '</span>';
 714                         } else {
 715                                 $display = htmlspecialchars( $display );
 716                         }
 717
 718                         if ( $diff < 0 ) {
 719                                 $ret .= str_repeat( "</li></ul>\n", -$diff ) . "</li><li>\n";
 720                         } elseif ( $diff == 0 ) {
 721                                 $ret .= "</li><li>\n";
 722                         } else {
 723                                 $ret .= str_repeat( "<ul><li>\n", $diff );
 724                         }
 725                         $ret .= "<tt>$display</tt>\n";
 726
 727                         $curIdent = $ident;
 728                 }
 729
 730                 $ret .= str_repeat( '</li></ul>', $curIdent ) . '</li>';
 731
 732                 return $ret;
 733         }
 734
 735         /**
 736          * This gets called shortly before the </body> tag.
 737          * @param $out OutputPage object
 738          * @return String HTML-wrapped JS code to be put before </body>
 739          */
 740         function bottomScripts( $out ) {
 741                 $bottomScriptText = "\n" . $out->getHeadScripts( $this );
 742                 wfRunHooks( 'SkinAfterBottomScripts', array( $this, &$bottomScriptText ) );
 743
 744                 return $bottomScriptText;
 745         }
 746
 747         /** @return string Retrievied from HTML text */
 748         function printSource() {
 749                 $url = htmlspecialchars( $this->getTitle()->getFullURL() );
 750                 return wfMsg( 'retrievedfrom', '<a href="' . $url . '">' . $url . '</a>' );
 751         }
 752
 753         function getUndeleteLink() {
 754                 $action = $this->getContext()->getRequest()->getVal( 'action', 'view' );
 755
 756                 if ( $this->getContext()->getUser()->isAllowed( 'deletedhistory' ) &&
 757                         ( $this->getTitle()->getArticleId() == 0 || $action == 'history' ) ) {
 758                         $n = $this->getTitle()->isDeleted();
 759
 760                         if ( $n ) {
 761                                 if ( $this->getContext()->getUser()->isAllowed( 'undelete' ) ) {
 762                                         $msg = 'thisisdeleted';
 763                                 } else {
 764                                         $msg = 'viewdeleted';
 765                                 }
 766
 767                                 return wfMsg(
 768                                         $msg,
 769                                         $this->link(
 770                                                 SpecialPage::getTitleFor( 'Undelete', $this->getTitle()->getPrefixedDBkey() ),
 771                                                 wfMsgExt( 'restorelink', array( 'parsemag', 'escape' ), $this->getContext()->getLang()->formatNum( $n ) ),
 772                                                 array(),
 773                                                 array(),
 774                                                 array( 'known', 'noclasses' )
 775                                         )
 776                                 );
 777                         }
 778                 }
 779
 780                 return '';
 781         }
 782
 783         /**
 784          * The format without an explicit $out argument is deprecated
 785          */
 786         function subPageSubtitle( OutputPage $out=null ) {
 787                 $out = $this->getContext()->getOutput();
 788                 $subpages = '';
 789
 790                 if ( !wfRunHooks( 'SkinSubPageSubtitle', array( &$subpages, $this, $out ) ) ) {
 791                         return $subpages;
 792                 }
 793
 794                 if ( $out->isArticle() && MWNamespace::hasSubpages( $out->getTitle()->getNamespace() ) ) {
 795                         $ptext = $this->getTitle()->getPrefixedText();
 796                         if ( preg_match( '/\//', $ptext ) ) {
 797                                 $links = explode( '/', $ptext );
 798                                 array_pop( $links );
 799                                 $c = 0;
 800                                 $growinglink = '';
 801                                 $display = '';
 802
 803                                 foreach ( $links as $link ) {
 804                                         $growinglink .= $link;
 805                                         $display .= $link;
 806                                         $linkObj = Title::newFromText( $growinglink );
 807
 808                                         if ( is_object( $linkObj ) && $linkObj->exists() ) {
 809                                                 $getlink = $this->link(
 810                                                         $linkObj,
 811                                                         htmlspecialchars( $display ),
 812                                                         array(),
 813                                                         array(),
 814                                                         array( 'known', 'noclasses' )
 815                                                 );
 816
 817                                                 $c++;
 818
 819                                                 if ( $c > 1 ) {
 820                                                         $subpages .= wfMsgExt( 'pipe-separator', 'escapenoentities' );
 821                                                 } else  {
 822                                                         $subpages .= '&lt; ';
 823                                                 }
 824
 825                                                 $subpages .= $getlink;
 826                                                 $display = '';
 827                                         } else {
 828                                                 $display .= '/';
 829                                         }
 830                                         $growinglink .= '/';
 831                                 }
 832                         }
 833                 }
 834
 835                 return $subpages;
 836         }
 837
 838         /**
 839          * Returns true if the IP should be shown in the header
 840          */
 841         function showIPinHeader() {
 842                 global $wgShowIPinHeader;
 843                 return $wgShowIPinHeader && session_id() != '';
 844         }
 845
 846         function getSearchLink() {
 847                 $searchPage = SpecialPage::getTitleFor( 'Search' );
 848                 return $searchPage->getLocalURL();
 849         }
 850
 851         function escapeSearchLink() {
 852                 return htmlspecialchars( $this->getSearchLink() );
 853         }
 854
 855         function getCopyright( $type = 'detect' ) {
 856                 global $wgRightsPage, $wgRightsUrl, $wgRightsText;
 857
 858                 if ( $type == 'detect' ) {
 859                         $diff = $this->getContext()->getRequest()->getVal( 'diff' );
 860
 861                         if ( is_null( $diff ) && !$this->isRevisionCurrent() && wfMsgForContent( 'history_copyright' ) !== '-' ) {
 862                                 $type = 'history';
 863                         } else {
 864                                 $type = 'normal';
 865                         }
 866                 }
 867
 868                 if ( $type == 'history' ) {
 869                         $msg = 'history_copyright';
 870                 } else {
 871                         $msg = 'copyright';
 872                 }
 873
 874                 $out = '';
 875
 876                 if ( $wgRightsPage ) {
 877                         $title = Title::newFromText( $wgRightsPage );
 878                         $link = $this->linkKnown( $title, $wgRightsText );
 879                 } elseif ( $wgRightsUrl ) {
 880                         $link = $this->makeExternalLink( $wgRightsUrl, $wgRightsText );
 881                 } elseif ( $wgRightsText ) {
 882                         $link = $wgRightsText;
 883                 } else {
 884                         # Give up now
 885                         return $out;
 886                 }
 887
 888                 // Allow for site and per-namespace customization of copyright notice.
 889                 $forContent = true;
 890
 891                 wfRunHooks( 'SkinCopyrightFooter', array( $this->getTitle(), $type, &$msg, &$link, &$forContent ) );
 892
 893                 if ( $forContent ) {
 894                         $out .= wfMsgForContent( $msg, $link );
 895                 } else {
 896                         $out .= wfMsg( $msg, $link );
 897                 }
 898
 899                 return $out;
 900         }
 901
 902         function getCopyrightIcon() {
 903                 global $wgRightsUrl, $wgRightsText, $wgRightsIcon, $wgCopyrightIcon;
 904
 905                 $out = '';
 906
 907                 if ( isset( $wgCopyrightIcon ) && $wgCopyrightIcon ) {
 908                         $out = $wgCopyrightIcon;
 909                 } elseif ( $wgRightsIcon ) {
 910                         $icon = htmlspecialchars( $wgRightsIcon );
 911
 912                         if ( $wgRightsUrl ) {
 913                                 $url = htmlspecialchars( $wgRightsUrl );
 914                                 $out .= '<a href="' . $url . '">';
 915                         }
 916
 917                         $text = htmlspecialchars( $wgRightsText );
 918                         $out .= "<img src=\"$icon\" alt=\"$text\" width=\"88\" height=\"31\" />";
 919
 920                         if ( $wgRightsUrl ) {
 921                                 $out .= '</a>';
 922                         }
 923                 }
 924
 925                 return $out;
 926         }
 927
 928         /**
 929          * Gets the powered by MediaWiki icon.
 930          * @return string
 931          */
 932         function getPoweredBy() {
 933                 global $wgStylePath;
 934
 935                 $url = htmlspecialchars( "$wgStylePath/common/images/poweredby_mediawiki_88x31.png" );
 936                 $text = '<a href="http://www.mediawiki.org/"><img src="' . $url . '" height="31" width="88" alt="Powered by MediaWiki" /></a>';
 937                 wfRunHooks( 'SkinGetPoweredBy', array( &$text, $this ) );
 938                 return $text;
 939         }
 940
 941         /**
 942          * Get the timestamp of the latest revision, formatted in user language
 943          *
 944          * @param $article Article object. Used if we're working with the current revision
 945          * @return String
 946          */
 947         protected function lastModified( $article ) {
 948                 if ( !$this->isRevisionCurrent() ) {
 949                         $timestamp = Revision::getTimestampFromId( $this->getTitle(), $this->mRevisionId );
 950                 } else {
 951                         $timestamp = $article->getTimestamp();
 952                 }
 953
 954                 if ( $timestamp ) {
 955                         $d = $this->getContext()->getLang()->date( $timestamp, true );
 956                         $t = $this->getContext()->getLang()->time( $timestamp, true );
 957                         $s = ' ' . wfMsg( 'lastmodifiedat', $d, $t );
 958                 } else {
 959                         $s = '';
 960                 }
 961
 962                 if ( wfGetLB()->getLaggedSlaveMode() ) {
 963                         $s .= ' <strong>' . wfMsg( 'laggedslavemode' ) . '</strong>';
 964                 }
 965
 966                 return $s;
 967         }
 968
 969         function logoText( $align = '' ) {
 970                 if ( $align != '' ) {
 971                         $a = " align='{$align}'";
 972                 } else {
 973                         $a = '';
 974                 }
 975
 976                 $mp = wfMsg( 'mainpage' );
 977                 $mptitle = Title::newMainPage();
 978                 $url = ( is_object( $mptitle ) ? $mptitle->escapeLocalURL() : '' );
 979
 980                 $logourl = $this->getLogo();
 981                 $s = "<a href='{$url}'><img{$a} src='{$logourl}' alt='[{$mp}]' /></a>";
 982
 983                 return $s;
 984         }
 985
 986         /**
 987          * Renders a $wgFooterIcons icon acording to the method's arguments
 988          * @param $icon Array: The icon to build the html for, see $wgFooterIcons for the format of this array
 989          * @param $withImage Boolean: Whether to use the icon's image or output a text-only footericon
 990          */
 991         function makeFooterIcon( $icon, $withImage = 'withImage' ) {
 992                 if ( is_string( $icon ) ) {
 993                         $html = $icon;
 994                 } else { // Assuming array
 995                         $url = isset($icon["url"]) ? $icon["url"] : null;
 996                         unset( $icon["url"] );
 997                         if ( isset( $icon["src"] ) && $withImage === 'withImage' ) {
 998                                 $html = Html::element( 'img', $icon ); // do this the lazy way, just pass icon data as an attribute array
 999                         } else {
1000                                 $html = htmlspecialchars( $icon["alt"] );
1001                         }
1002                         if ( $url ) {
1003                                 $html = Html::rawElement( 'a', array( "href" => $url ), $html );
1004                         }
1005                 }
1006                 return $html;
1007         }
1008
1009         /**
1010          * Gets the link to the wiki's main page.
1011          * @return string
1012          */
1013         function mainPageLink() {
1014                 $s = $this->link(
1015                         Title::newMainPage(),
1016                         wfMsg( 'mainpage' ),
1017                         array(),
1018                         array(),
1019                         array( 'known', 'noclasses' )
1020                 );
1021
1022                 return $s;
1023         }
1024
1025         public function footerLink( $desc, $page ) {
1026                 // if the link description has been set to "-" in the default language,
1027                 if ( wfMsgForContent( $desc )  == '-' ) {
1028                         // then it is disabled, for all languages.
1029                         return '';
1030                 } else {
1031                         // Otherwise, we display the link for the user, described in their
1032                         // language (which may or may not be the same as the default language),
1033                         // but we make the link target be the one site-wide page.
1034                         $title = Title::newFromText( wfMsgForContent( $page ) );
1035
1036                         return $this->linkKnown(
1037                                 $title,
1038                                 wfMsgExt( $desc, array( 'parsemag', 'escapenoentities' ) )
1039                         );
1040                 }
1041         }
1042
1043         /**
1044          * Gets the link to the wiki's privacy policy page.
1045          */
1046         function privacyLink() {
1047                 return $this->footerLink( 'privacy', 'privacypage' );
1048         }
1049
1050         /**
1051          * Gets the link to the wiki's about page.
1052          */
1053         function aboutLink() {
1054                 return $this->footerLink( 'aboutsite', 'aboutpage' );
1055         }
1056
1057         /**
1058          * Gets the link to the wiki's general disclaimers page.
1059          */
1060         function disclaimerLink() {
1061                 return $this->footerLink( 'disclaimers', 'disclaimerpage' );
1062         }
1063
1064         /**
1065          * Return URL options for the 'edit page' link.
1066          * This may include an 'oldid' specifier, if the current page view is such.
1067          *
1068          * @return array
1069          * @private
1070          */
1071         function editUrlOptions() {
1072                 $options = array( 'action' => 'edit' );
1073
1074                 if ( !$this->isRevisionCurrent() ) {
1075                         $options['oldid'] = intval( $this->mRevisionId );
1076                 }
1077
1078                 return $options;
1079         }
1080
1081         function showEmailUser( $id ) {
1082                 $targetUser = User::newFromId( $id );
1083                 return $this->getContext()->getUser()->canSendEmail() && # the sending user must have a confirmed email address
1084                         $targetUser->canReceiveEmail(); # the target user must have a confirmed email address and allow emails from users
1085         }
1086
1087         /**
1088          * Return a fully resolved style path url to images or styles stored in the common folder.
1089          * This method returns a url resolved using the configured skin style path
1090          * and includes the style version inside of the url.
1091          * @param $name String: The name or path of a skin resource file
1092          * @return String The fully resolved style path url including styleversion
1093          */
1094         function getCommonStylePath( $name ) {
1095                 global $wgStylePath, $wgStyleVersion;
1096                 return "$wgStylePath/common/$name?$wgStyleVersion";
1097         }
1098
1099         /**
1100          * Return a fully resolved style path url to images or styles stored in the curent skins's folder.
1101          * This method returns a url resolved using the configured skin style path
1102          * and includes the style version inside of the url.
1103          * @param $name String: The name or path of a skin resource file
1104          * @return String The fully resolved style path url including styleversion
1105          */
1106         function getSkinStylePath( $name ) {
1107                 global $wgStylePath, $wgStyleVersion;
1108                 return "$wgStylePath/{$this->stylename}/$name?$wgStyleVersion";
1109         }
1110
1111         /* these are used extensively in SkinTemplate, but also some other places */
1112         static function makeMainPageUrl( $urlaction = '' ) {
1113                 $title = Title::newMainPage();
1114                 self::checkTitle( $title, '' );
1115
1116                 return $title->getLocalURL( $urlaction );
1117         }
1118
1119         static function makeSpecialUrl( $name, $urlaction = '' ) {
1120                 $title = SpecialPage::getTitleFor( $name );
1121                 return $title->getLocalURL( $urlaction );
1122         }
1123
1124         static function makeSpecialUrlSubpage( $name, $subpage, $urlaction = '' ) {
1125                 $title = SpecialPage::getSafeTitleFor( $name, $subpage );
1126                 return $title->getLocalURL( $urlaction );
1127         }
1128
1129         static function makeI18nUrl( $name, $urlaction = '' ) {
1130                 $title = Title::newFromText( wfMsgForContent( $name ) );
1131                 self::checkTitle( $title, $name );
1132                 return $title->getLocalURL( $urlaction );
1133         }
1134
1135         static function makeUrl( $name, $urlaction = '' ) {
1136                 $title = Title::newFromText( $name );
1137                 self::checkTitle( $title, $name );
1138
1139                 return $title->getLocalURL( $urlaction );
1140         }
1141
1142         /**
1143          * If url string starts with http, consider as external URL, else
1144          * internal
1145          */
1146         static function makeInternalOrExternalUrl( $name ) {
1147                 if ( preg_match( '/^(?:' . wfUrlProtocols() . ')/', $name ) ) {
1148                         return $name;
1149                 } else {
1150                         return self::makeUrl( $name );
1151                 }
1152         }
1153
1154         # this can be passed the NS number as defined in Language.php
1155         static function makeNSUrl( $name, $urlaction = '', $namespace = NS_MAIN ) {
1156                 $title = Title::makeTitleSafe( $namespace, $name );
1157                 self::checkTitle( $title, $name );
1158
1159                 return $title->getLocalURL( $urlaction );
1160         }
1161
1162         /* these return an array with the 'href' and boolean 'exists' */
1163         static function makeUrlDetails( $name, $urlaction = '' ) {
1164                 $title = Title::newFromText( $name );
1165                 self::checkTitle( $title, $name );
1166
1167                 return array(
1168                         'href' => $title->getLocalURL( $urlaction ),
1169                         'exists' => $title->getArticleID() != 0,
1170                 );
1171         }
1172
1173         /**
1174          * Make URL details where the article exists (or at least it's convenient to think so)
1175          */
1176         static function makeKnownUrlDetails( $name, $urlaction = '' ) {
1177                 $title = Title::newFromText( $name );
1178                 self::checkTitle( $title, $name );
1179
1180                 return array(
1181                         'href' => $title->getLocalURL( $urlaction ),
1182                         'exists' => true
1183                 );
1184         }
1185
1186         # make sure we have some title to operate on
1187         static function checkTitle( &$title, $name ) {
1188                 if ( !is_object( $title ) ) {
1189                         $title = Title::newFromText( $name );
1190                         if ( !is_object( $title ) ) {
1191                                 $title = Title::newFromText( '--error: link target missing--' );
1192                         }
1193                 }
1194         }
1195
1196         /**
1197          * Build an array that represents the sidebar(s), the navigation bar among them
1198          *
1199          * @return array
1200          */
1201         function buildSidebar() {
1202                 global $parserMemc, $wgEnableSidebarCache, $wgSidebarCacheExpiry;
1203                 wfProfileIn( __METHOD__ );
1204
1205                 $key = wfMemcKey( 'sidebar', $this->getContext()->getLang()->getCode() );
1206
1207                 if ( $wgEnableSidebarCache ) {
1208                         $cachedsidebar = $parserMemc->get( $key );
1209                         if ( $cachedsidebar ) {
1210                                 wfProfileOut( __METHOD__ );
1211                                 return $cachedsidebar;
1212                         }
1213                 }
1214
1215                 $bar = array();
1216                 $this->addToSidebar( $bar, 'sidebar' );
1217
1218                 wfRunHooks( 'SkinBuildSidebar', array( $this, &$bar ) );
1219                 if ( $wgEnableSidebarCache ) {
1220                         $parserMemc->set( $key, $bar, $wgSidebarCacheExpiry );
1221                 }
1222
1223                 wfProfileOut( __METHOD__ );
1224                 return $bar;
1225         }
1226         /**
1227          * Add content from a sidebar system message
1228          * Currently only used for MediaWiki:Sidebar (but may be used by Extensions)
1229          *
1230          * This is just a wrapper around addToSidebarPlain() for backwards compatibility
1231          *
1232          * @param &$bar array
1233          * @param $message String
1234          */
1235         function addToSidebar( &$bar, $message ) {
1236                 $this->addToSidebarPlain( $bar, wfMsgForContentNoTrans( $message ) );
1237         }
1238
1239         /**
1240          * Add content from plain text
1241          * @since 1.17
1242          * @param &$bar array
1243          * @param $text string
1244          */
1245         function addToSidebarPlain( &$bar, $text ) {
1246                 $lines = explode( "\n", $text );
1247                 $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.
1248
1249                 $heading = '';
1250
1251                 foreach ( $lines as $line ) {
1252                         if ( strpos( $line, '*' ) !== 0 ) {
1253                                 continue;
1254                         }
1255
1256                         if ( strpos( $line, '**' ) !== 0 ) {
1257                                 $heading = trim( $line, '* ' );
1258                                 if ( !array_key_exists( $heading, $bar ) ) {
1259                                         $bar[$heading] = array();
1260                                 }
1261                         } else {
1262                                 $line = trim( $line, '* ' );
1263
1264                                 if ( strpos( $line, '|' ) !== false ) { // sanity check
1265                                         $line = MessageCache::singleton()->transform( $line, false, null, $this->getTitle() );
1266                                         $line = array_map( 'trim', explode( '|', $line, 2 ) );
1267                                         $link = wfMsgForContent( $line[0] );
1268
1269                                         if ( $link == '-' ) {
1270                                                 continue;
1271                                         }
1272
1273                                         $text = wfMsgExt( $line[1], 'parsemag' );
1274
1275                                         if ( wfEmptyMsg( $line[1] ) ) {
1276                                                 $text = $line[1];
1277                                         }
1278
1279                                         if ( wfEmptyMsg( $line[0] ) ) {
1280                                                 $link = $line[0];
1281                                         }
1282
1283                                         if ( preg_match( '/^(?:' . wfUrlProtocols() . ')/', $link ) ) {
1284                                                 $href = $link;
1285                                         } else {
1286                                                 $title = Title::newFromText( $link );
1287
1288                                                 if ( $title ) {
1289                                                         $title = $title->fixSpecialName();
1290                                                         $href = $title->getLocalURL();
1291                                                 } else {
1292                                                         $href = 'INVALID-TITLE';
1293                                                 }
1294                                         }
1295
1296                                         $bar[$heading][] = array(
1297                                                 'text' => $text,
1298                                                 'href' => $href,
1299                                                 'id' => 'n-' . strtr( $line[1], ' ', '-' ),
1300                                                 'active' => false
1301                                         );
1302                                 } else if ( ( substr( $line, 0, 2 ) == '{{' ) && ( substr( $line, -2 ) == '}}' ) ) {
1303                                         global $wgParser;
1304
1305                                         $line = substr( $line, 2, strlen( $line ) - 4 );
1306
1307                                         $options = new ParserOptions();
1308                                         $options->setEditSection( false );
1309                                         $options->setInterfaceMessage( true );
1310                                         $wikiBar[$heading] = $wgParser->parse( wfMsgForContentNoTrans( $line ) , $this->getTitle(), $options )->getText();
1311                                 } else {
1312                                         continue;
1313                                 }
1314                         }
1315                 }
1316
1317                 if ( count( $wikiBar ) > 0 ) {
1318                         $bar = array_merge( $bar, $wikiBar );
1319                 }
1320
1321                 return $bar;
1322         }
1323
1324         /**
1325          * Should we include common/wikiprintable.css?  Skins that have their own
1326          * print stylesheet should override this and return false.  (This is an
1327          * ugly hack to get Monobook to play nicely with
1328          * OutputPage::headElement().)
1329          *
1330          * @return bool
1331          */
1332         public function commonPrintStylesheet() {
1333                 return true;
1334         }
1335
1336         /**
1337          * Gets new talk page messages for the current user.
1338          * @return MediaWiki message or if no new talk page messages, nothing
1339          */
1340         function getNewtalks() {
1341                 $out = $this->getContext()->getOutput();
1342
1343                 $newtalks = $this->getContext()->getUser()->getNewMessageLinks();
1344                 $ntl = '';
1345
1346                 if ( count( $newtalks ) == 1 && $newtalks[0]['wiki'] === wfWikiID() ) {
1347                         $userTitle = $this->getUser()->getUserPage();
1348                         $userTalkTitle = $userTitle->getTalkPage();
1349
1350                         if ( !$userTalkTitle->equals( $out->getTitle() ) ) {
1351                                 $newMessagesLink = $this->link(
1352                                         $userTalkTitle,
1353                                         wfMsgHtml( 'newmessageslink' ),
1354                                         array(),
1355                                         array( 'redirect' => 'no' ),
1356                                         array( 'known', 'noclasses' )
1357                                 );
1358
1359                                 $newMessagesDiffLink = $this->link(
1360                                         $userTalkTitle,
1361                                         wfMsgHtml( 'newmessagesdifflink' ),
1362                                         array(),
1363                                         array( 'diff' => 'cur' ),
1364                                         array( 'known', 'noclasses' )
1365                                 );
1366
1367                                 $ntl = wfMsg(
1368                                         'youhavenewmessages',
1369                                         $newMessagesLink,
1370                                         $newMessagesDiffLink
1371                                 );
1372                                 # Disable Squid cache
1373                                 $out->setSquidMaxage( 0 );
1374                         }
1375                 } elseif ( count( $newtalks ) ) {
1376                         // _>" " for BC <= 1.16
1377                         $sep = str_replace( '_', ' ', wfMsgHtml( 'newtalkseparator' ) );
1378                         $msgs = array();
1379
1380                         foreach ( $newtalks as $newtalk ) {
1381                                 $msgs[] = Xml::element(
1382                                         'a',
1383                                         array( 'href' => $newtalk['link'] ), $newtalk['wiki']
1384                                 );
1385                         }
1386                         $parts = implode( $sep, $msgs );
1387                         $ntl = wfMsgHtml( 'youhavenewmessagesmulti', $parts );
1388                         $out->setSquidMaxage( 0 );
1389                 }
1390
1391                 return $ntl;
1392         }
1393
1394         /**
1395          * Get a cached notice
1396          *
1397          * @param $name String: message name, or 'default' for $wgSiteNotice
1398          * @return String: HTML fragment
1399          */
1400         private function getCachedNotice( $name ) {
1401                 global $wgRenderHashAppend, $parserMemc;
1402
1403                 wfProfileIn( __METHOD__ );
1404
1405                 $needParse = false;
1406
1407                 if( $name === 'default' ) {
1408                         // special case
1409                         global $wgSiteNotice;
1410                         $notice = $wgSiteNotice;
1411                         if( empty( $notice ) ) {
1412                                 wfProfileOut( __METHOD__ );
1413                                 return false;
1414                         }
1415                 } else {
1416                         $msg = wfMessage( $name )->inContentLanguage();
1417                         if( $msg->isDisabled() ) {
1418                                 wfProfileOut( __METHOD__ );
1419                                 return false;
1420                         }
1421                         $notice = $msg->plain();
1422                 }
1423
1424                 // Use the extra hash appender to let eg SSL variants separately cache.
1425                 $key = wfMemcKey( $name . $wgRenderHashAppend );
1426                 $cachedNotice = $parserMemc->get( $key );
1427                 if( is_array( $cachedNotice ) ) {
1428                         if( md5( $notice ) == $cachedNotice['hash'] ) {
1429                                 $notice = $cachedNotice['html'];
1430                         } else {
1431                                 $needParse = true;
1432                         }
1433                 } else {
1434                         $needParse = true;
1435                 }
1436
1437                 if ( $needParse ) {
1438                         $parsed = $this->getContext()->getOutput()->parse( $notice );
1439                         $parserMemc->set( $key, array( 'html' => $parsed, 'hash' => md5( $notice ) ), 600 );
1440                         $notice = $parsed;
1441                 }
1442
1443                 $notice = '<div id="localNotice">' .$notice . '</div>';
1444                 wfProfileOut( __METHOD__ );
1445                 return $notice;
1446         }
1447
1448         /**
1449          * Get a notice based on page's namespace
1450          *
1451          * @return String: HTML fragment
1452          */
1453         function getNamespaceNotice() {
1454                 wfProfileIn( __METHOD__ );
1455
1456                 $key = 'namespacenotice-' . $this->getTitle()->getNsText();
1457                 $namespaceNotice = $this->getCachedNotice( $key );
1458                 if ( $namespaceNotice && substr( $namespaceNotice, 0, 7 ) != '<p>&lt;' ) {
1459                         $namespaceNotice = '<div id="namespacebanner">' . $namespaceNotice . '</div>';
1460                 } else {
1461                         $namespaceNotice = '';
1462                 }
1463
1464                 wfProfileOut( __METHOD__ );
1465                 return $namespaceNotice;
1466         }
1467
1468         /**
1469          * Get the site notice
1470          *
1471          * @return String: HTML fragment
1472          */
1473         function getSiteNotice() {
1474                 wfProfileIn( __METHOD__ );
1475                 $siteNotice = '';
1476
1477                 if ( wfRunHooks( 'SiteNoticeBefore', array( &$siteNotice, $this ) ) ) {
1478                         if ( is_object( $this->getContext()->getUser() ) && $this->getContext()->getUser()->isLoggedIn() ) {
1479                                 $siteNotice = $this->getCachedNotice( 'sitenotice' );
1480                         } else {
1481                                 $anonNotice = $this->getCachedNotice( 'anonnotice' );
1482                                 if ( !$anonNotice ) {
1483                                         $siteNotice = $this->getCachedNotice( 'sitenotice' );
1484                                 } else {
1485                                         $siteNotice = $anonNotice;
1486                                 }
1487                         }
1488                         if ( !$siteNotice ) {
1489                                 $siteNotice = $this->getCachedNotice( 'default' );
1490                         }
1491                 }
1492
1493                 wfRunHooks( 'SiteNoticeAfter', array( &$siteNotice, $this ) );
1494                 wfProfileOut( __METHOD__ );
1495                 return $siteNotice;
1496         }
1497
1498         /**
1499          * Create a section edit link.  This supersedes editSectionLink() and
1500          * editSectionLinkForOther().
1501          *
1502          * @param $nt      Title  The title being linked to (may not be the same as
1503          *   $wgTitle, if the section is included from a template)
1504          * @param $section string The designation of the section being pointed to,
1505          *   to be included in the link, like "&section=$section"
1506          * @param $tooltip string The tooltip to use for the link: will be escaped
1507          *   and wrapped in the 'editsectionhint' message
1508          * @param $lang    string Language code
1509          * @return         string HTML to use for edit link
1510          */
1511         public function doEditSectionLink( Title $nt, $section, $tooltip = null, $lang = false ) {
1512                 // HTML generated here should probably have userlangattributes
1513                 // added to it for LTR text on RTL pages
1514                 $attribs = array();
1515                 if ( !is_null( $tooltip ) ) {
1516                         # Bug 25462: undo double-escaping.
1517                         $tooltip = Sanitizer::decodeCharReferences( $tooltip );
1518                         $attribs['title'] = wfMsgReal( 'editsectionhint', array( $tooltip ), true, $lang );
1519                 }
1520                 $link = Linker::link( $nt, wfMsgExt( 'editsection', array( 'language' => $lang ) ),
1521                         $attribs,
1522                         array( 'action' => 'edit', 'section' => $section ),
1523                         array( 'noclasses', 'known' )
1524                 );
1525
1526                 # Run the old hook.  This takes up half of the function . . . hopefully
1527                 # we can rid of it someday.
1528                 $attribs = '';
1529                 if ( $tooltip ) {
1530                         $attribs = htmlspecialchars( wfMsgReal( 'editsectionhint', array( $tooltip ), true, $lang ) );
1531                         $attribs = " title=\"$attribs\"";
1532                 }
1533                 $result = null;
1534                 wfRunHooks( 'EditSectionLink', array( &$this, $nt, $section, $attribs, $link, &$result, $lang ) );
1535                 if ( !is_null( $result ) ) {
1536                         # For reverse compatibility, add the brackets *after* the hook is
1537                         # run, and even add them to hook-provided text.  (This is the main
1538                         # reason that the EditSectionLink hook is deprecated in favor of
1539                         # DoEditSectionLink: it can't change the brackets or the span.)
1540                         $result = wfMsgExt( 'editsection-brackets', array( 'escape', 'replaceafter', 'language' => $lang ), $result );
1541                         return "<span class=\"editsection\">$result</span>";
1542                 }
1543
1544                 # Add the brackets and the span, and *then* run the nice new hook, with
1545                 # clean and non-redundant arguments.
1546                 $result = wfMsgExt( 'editsection-brackets', array( 'escape', 'replaceafter', 'language' => $lang ), $link );
1547                 $result = "<span class=\"editsection\">$result</span>";
1548
1549                 wfRunHooks( 'DoEditSectionLink', array( $this, $nt, $section, $tooltip, &$result, $lang ) );
1550                 return $result;
1551         }
1552
1553         /**
1554          * Use PHP's magic __call handler to intercept legacy calls to the linker
1555          * for backwards compatibility.
1556          *
1557          * @param $fname String Name of called method
1558          * @param $args Array Arguments to the method
1559          */
1560         function __call( $fname, $args ) {
1561                 $realFunction = array( 'Linker', $fname );
1562                 if ( is_callable( $realFunction ) ) {
1563                         return call_user_func_array( $realFunction, $args );
1564                 } else {
1565                         $className = get_class( $this );
1566                         throw new MWException( "Call to undefined method $className::$fname" );
1567                 }
1568         }
1569
1570 }