includes/Skin.php

   1 <?php
   2 /**
   3  * @defgroup Skins Skins
   4  */
   5
   6 if ( !defined( 'MEDIAWIKI' ) ) {
   7         die( 1 );
   8 }
   9
  10 /**
  11  * The main skin class that provide methods and properties for all other skins.
  12  * This base class is also the "Standard" skin.
  13  *
  14  * See docs/skin.txt for more information.
  15  *
  16  * @ingroup Skins
  17  */
  18 abstract class Skin {
  19         /**#@+
  20          * @private
  21          */
  22         var $mWatchLinkNum = 0; // Appended to end of watch link id's
  23         /**#@-*/
  24         protected $mRevisionId; // The revision ID we're looking at, null if not applicable.
  25         protected $skinname = 'standard';
  26         protected $mRelevantTitle = null;
  27         protected $mRelevantUser = null;
  28
  29         /**
  30          * Fetch the set of available skins.
  31          * @return array of strings
  32          */
  33         static function getSkinNames() {
  34                 global $wgValidSkinNames;
  35                 static $skinsInitialised = false;
  36
  37                 if ( !$skinsInitialised || !count( $wgValidSkinNames ) ) {
  38                         # Get a list of available skins
  39                         # Build using the regular expression '^(.*).php$'
  40                         # Array keys are all lower case, array value keep the case used by filename
  41                         #
  42                         wfProfileIn( __METHOD__ . '-init' );
  43
  44                         global $wgStyleDirectory;
  45
  46                         $skinDir = dir( $wgStyleDirectory );
  47
  48                         # while code from www.php.net
  49                         while ( false !== ( $file = $skinDir->read() ) ) {
  50                                 // Skip non-PHP files, hidden files, and '.dep' includes
  51                                 $matches = array();
  52
  53                                 if ( preg_match( '/^([^.]*)\.php$/', $file, $matches ) ) {
  54                                         $aSkin = $matches[1];
  55                                         $wgValidSkinNames[strtolower( $aSkin )] = $aSkin;
  56                                 }
  57                         }
  58                         $skinDir->close();
  59                         $skinsInitialised = true;
  60                         wfProfileOut( __METHOD__ . '-init' );
  61                 }
  62                 return $wgValidSkinNames;
  63         }
  64
  65         /**
  66          * Fetch the list of usable skins in regards to $wgSkipSkins.
  67          * Useful for Special:Preferences and other places where you
  68          * only want to show skins users _can_ use.
  69          * @return array of strings
  70          */
  71         public static function getUsableSkins() {
  72                 global $wgSkipSkins;
  73
  74                 $usableSkins = self::getSkinNames();
  75
  76                 foreach ( $wgSkipSkins as $skip ) {
  77                         unset( $usableSkins[$skip] );
  78                 }
  79
  80                 return $usableSkins;
  81         }
  82
  83         /**
  84          * Normalize a skin preference value to a form that can be loaded.
  85          * If a skin can't be found, it will fall back to the configured
  86          * default (or the old 'Classic' skin if that's broken).
  87          * @param $key String: 'monobook', 'standard', etc.
  88          * @return string
  89          */
  90         static function normalizeKey( $key ) {
  91                 global $wgDefaultSkin;
  92
  93                 $skinNames = Skin::getSkinNames();
  94
  95                 if ( $key == '' ) {
  96                         // Don't return the default immediately;
  97                         // in a misconfiguration we need to fall back.
  98                         $key = $wgDefaultSkin;
  99                 }
 100
 101                 if ( isset( $skinNames[$key] ) ) {
 102                         return $key;
 103                 }
 104
 105                 // Older versions of the software used a numeric setting
 106                 // in the user preferences.
 107                 $fallback = array(
 108                         0 => $wgDefaultSkin,
 109                         1 => 'nostalgia',
 110                         2 => 'cologneblue'
 111                 );
 112
 113                 if ( isset( $fallback[$key] ) ) {
 114                         $key = $fallback[$key];
 115                 }
 116
 117                 if ( isset( $skinNames[$key] ) ) {
 118                         return $key;
 119                 } else if ( isset( $skinNames[$wgDefaultSkin] ) ) {
 120                         return $wgDefaultSkin;
 121                 } else {
 122                         return 'vector';
 123                 }
 124         }
 125
 126         /**
 127          * Factory method for loading a skin of a given type
 128          * @param $key String: 'monobook', 'standard', etc.
 129          * @return Skin
 130          */
 131         static function &newFromKey( $key ) {
 132                 global $wgStyleDirectory;
 133
 134                 $key = Skin::normalizeKey( $key );
 135
 136                 $skinNames = Skin::getSkinNames();
 137                 $skinName = $skinNames[$key];
 138                 $className = "Skin{$skinName}";
 139
 140                 # Grab the skin class and initialise it.
 141                 if ( !class_exists( $className ) ) {
 142                         // Preload base classes to work around APC/PHP5 bug
 143                         $deps = "{$wgStyleDirectory}/{$skinName}.deps.php";
 144
 145                         if ( file_exists( $deps ) ) {
 146                                 include_once( $deps );
 147                         }
 148                         require_once( "{$wgStyleDirectory}/{$skinName}.php" );
 149
 150                         # Check if we got if not failback to default skin
 151                         if ( !class_exists( $className ) ) {
 152                                 # DO NOT die if the class isn't found. This breaks maintenance
 153                                 # scripts and can cause a user account to be unrecoverable
 154                                 # except by SQL manipulation if a previously valid skin name
 155                                 # is no longer valid.
 156                                 wfDebug( "Skin class does not exist: $className\n" );
 157                                 $className = 'SkinVector';
 158                                 require_once( "{$wgStyleDirectory}/Vector.php" );
 159                         }
 160                 }
 161                 $skin = new $className;
 162                 return $skin;
 163         }
 164
 165         /** @return string path to the skin stylesheet */
 166         function getStylesheet() {
 167                 return 'common/wikistandard.css';
 168         }
 169
 170         /** @return string skin name */
 171         public function getSkinName() {
 172                 return $this->skinname;
 173         }
 174
 175         function initPage( OutputPage $out ) {
 176                 wfProfileIn( __METHOD__ );
 177
 178                 $this->mRevisionId = $out->mRevisionId;
 179                 $this->preloadExistence();
 180                 $this->setMembers();
 181
 182                 wfProfileOut( __METHOD__ );
 183         }
 184
 185         /**
 186          * Preload the existence of three commonly-requested pages in a single query
 187          */
 188         function preloadExistence() {
 189                 $user = $this->getContext()->getUser();
 190
 191                 // User/talk link
 192                 $titles = array( $user->getUserPage(), $user->getTalkPage() );
 193
 194                 // Other tab link
 195                 if ( $this->getTitle()->getNamespace() == NS_SPECIAL ) {
 196                         // nothing
 197                 } elseif ( $this->getTitle()->isTalkPage() ) {
 198                         $titles[] = $this->getTitle()->getSubjectPage();
 199                 } else {
 200                         $titles[] = $this->getTitle()->getTalkPage();
 201                 }
 202
 203                 $lb = new LinkBatch( $titles );
 204                 $lb->setCaller( __METHOD__ );
 205                 $lb->execute();
 206         }
 207
 208         /**
 209          * Set some local variables
 210          */
 211         protected function setMembers() {
 212                 $this->userpage = $this->getContext()->getUser()->getUserPage()->getPrefixedText();
 213                 $this->usercss = false;
 214         }
 215
 216         /**
 217          * Whether the revision displayed is the latest revision of the page
 218          *
 219          * @return Boolean
 220          */
 221         public function isRevisionCurrent() {
 222                 return $this->mRevisionId == 0 || $this->mRevisionId == $this->getTitle()->getLatestRevID();
 223         }
 224
 225         /**
 226          * Set the RequestContext used in this instance
 227          *
 228          * @param RequestContext $context
 229          */
 230         public function setContext( RequestContext $context ) {
 231                 $this->mContext = $context;
 232         }
 233
 234         /**
 235          * Get the RequestContext used in this instance
 236          *
 237          * @return RequestContext
 238          */
 239         public function getContext() {
 240                 if ( !isset($this->mContext) ) {
 241                         wfDebug( __METHOD__ . " called and \$mContext is null. Using RequestContext::getMain(); for sanity\n" );
 242                         $this->mContext = RequestContext::getMain();
 243                 }
 244                 return $this->mContext;
 245         }
 246
 247         /** Get the title
 248          *
 249          * @return Title
 250          */
 251         public function getTitle() {
 252                 return $this->getContext()->getTitle();
 253         }
 254
 255         /** Get the user
 256          *
 257          * @return User
 258          */
 259         public function getUser() {
 260                 return $this->getContext()->getUser();
 261         }
 262
 263         /**
 264          * Set the "relevant" title
 265          * @see self::getRelevantTitle()
 266          * @param $t Title object to use
 267          */
 268         public function setRelevantTitle( $t ) {
 269                 $this->mRelevantTitle = $t;
 270         }
 271
 272         /**
 273          * Return the "relevant" title.
 274          * A "relevant" title is not necessarily the actual title of the page.
 275          * Special pages like Special:MovePage use set the page they are acting on
 276          * as their "relevant" title, this allows the skin system to display things
 277          * such as content tabs which belong to to that page instead of displaying
 278          * a basic special page tab which has almost no meaning.
 279          */
 280         public function getRelevantTitle() {
 281                 if ( isset($this->mRelevantTitle) ) {
 282                         return $this->mRelevantTitle;
 283                 }
 284                 return $this->getTitle();
 285         }
 286
 287         /**
 288          * Set the "relevant" user
 289          * @see self::getRelevantUser()
 290          * @param $u User object to use
 291          */
 292         public function setRelevantUser( $u ) {
 293                 $this->mRelevantUser = $u;
 294         }
 295
 296         /**
 297          * Return the "relevant" user.
 298          * A "relevant" user is similar to a relevant title. Special pages like
 299          * Special:Contributions mark the user which they are relevant to so that
 300          * things like the toolbox can display the information they usually are only
 301          * able to display on a user's userpage and talkpage.
 302          */
 303         public function getRelevantUser() {
 304                 if ( isset($this->mRelevantUser) ) {
 305                         return $this->mRelevantUser;
 306                 }
 307                 $title = $this->getRelevantTitle();
 308                 if( $title->getNamespace() == NS_USER || $title->getNamespace() == NS_USER_TALK ) {
 309                         $rootUser = strtok( $title->getText(), '/' );
 310                         if ( User::isIP( $rootUser ) ) {
 311                                 $this->mRelevantUser = User::newFromName( $rootUser, false );
 312                         } else {
 313                                 $user = User::newFromName( $rootUser );
 314                                 if ( $user->isLoggedIn() ) {
 315                                         $this->mRelevantUser = $user;
 316                                 }
 317                         }
 318                         return $this->mRelevantUser;
 319                 }
 320                 return null;
 321         }
 322
 323         /**
 324          * Outputs the HTML generated by other functions.
 325          * @param $out Object: instance of OutputPage
 326          */
 327         abstract function outputPage( OutputPage $out );
 328
 329         static function makeVariablesScript( $data ) {
 330                 if ( $data ) {
 331                         return Html::inlineScript(
 332                                 ResourceLoader::makeLoaderConditionalScript( ResourceLoader::makeConfigSetScript( $data ) )
 333                         );
 334                 } else {
 335                         return '';
 336                 }
 337         }
 338
 339         /**
 340          * To make it harder for someone to slip a user a fake
 341          * user-JavaScript or user-CSS preview, a random token
 342          * is associated with the login session. If it's not
 343          * passed back with the preview request, we won't render
 344          * the code.
 345          *
 346          * @param $action String: 'edit', 'submit' etc.
 347          * @return bool
 348          */
 349         public function userCanPreview( $action ) {
 350                 if ( $action != 'submit' ) {
 351                         return false;
 352                 }
 353                 if ( !$this->getContext()->getRequest()->wasPosted() ) {
 354                         return false;
 355                 }
 356                 if ( !$this->getTitle()->userCanEditCssSubpage() ) {
 357                         return false;
 358                 }
 359                 if ( !$this->getTitle()->userCanEditJsSubpage() ) {
 360                         return false;
 361                 }
 362
 363                 return $this->getContext()->getUser()->matchEditToken(
 364                         $this->getContext()->getRequest()->getVal( 'wpEditToken' ) );
 365         }
 366
 367         /**
 368          * Generated JavaScript action=raw&gen=js
 369          * This returns MediaWiki:Common.js and MediaWiki:[Skinname].js concate-
 370          * nated together.  For some bizarre reason, it does *not* return any
 371          * custom user JS from subpages.  Huh?
 372          *
 373          * There's absolutely no reason to have separate Monobook/Common JSes.
 374          * Any JS that cares can just check the skin variable generated at the
 375          * top.  For now Monobook.js will be maintained, but it should be consi-
 376          * dered deprecated.
 377          *
 378          * @param $skinName String: If set, overrides the skin name
 379          * @return string
 380          */
 381         public function generateUserJs( $skinName = null ) {
 382
 383                 // Stub - see ResourceLoaderSiteModule, CologneBlue, Simple and Standard skins override this
 384
 385                 return '';
 386         }
 387
 388         /**
 389          * Generate user stylesheet for action=raw&gen=css
 390          */
 391         public function generateUserStylesheet() {
 392
 393                 // Stub - see ResourceLoaderUserModule, CologneBlue, Simple and Standard skins override this
 394
 395                 return '';
 396         }
 397
 398         /**
 399          * Split for easier subclassing in SkinSimple, SkinStandard and SkinCologneBlue
 400          * Anything in here won't be generated if $wgAllowUserCssPrefs is false.
 401          */
 402         protected function reallyGenerateUserStylesheet() {
 403
 404                 // Stub - see  ResourceLoaderUserModule, CologneBlue, Simple and Standard skins override this
 405
 406                 return '';
 407         }
 408
 409         /**
 410          * @private
 411          */
 412         function setupUserCss( OutputPage $out ) {
 413                 global $wgUseSiteCss, $wgAllowUserCss, $wgAllowUserCssPrefs;
 414
 415                 wfProfileIn( __METHOD__ );
 416
 417                 $this->setupSkinUserCss( $out );
 418                 // Add any extension CSS
 419                 foreach ( $out->getExtStyle() as $url ) {
 420                         $out->addStyle( $url );
 421                 }
 422
 423                 // Per-site custom styles
 424                 if ( $wgUseSiteCss ) {
 425                         $out->addModuleStyles( array( 'site', 'noscript' ) );
 426                         if( $this->getContext()->getUser()->isLoggedIn() ){
 427                                 $out->addModuleStyles( 'user.groups' );
 428                         }
 429                 }
 430
 431                 // Per-user custom styles
 432                 if ( $wgAllowUserCss ) {
 433                         if ( $this->getTitle()->isCssSubpage() && $this->userCanPreview( $this->getContext()->getRequest()->getVal( 'action' ) ) ) {
 434                                 // @FIXME: properly escape the cdata!
 435                                 $out->addInlineStyle( $this->getContext()->getRequest()->getText( 'wpTextbox1' ) );
 436                         } else {
 437                                 $out->addModuleStyles( 'user' );
 438                         }
 439                 }
 440
 441                 // Per-user preference styles
 442                 if ( $wgAllowUserCssPrefs ) {
 443                         $out->addModuleStyles( 'user.options' );
 444                 }
 445
 446                 wfProfileOut( __METHOD__ );
 447         }
 448
 449         /**
 450          * Get the query to generate a dynamic stylesheet
 451          *
 452          * @return array
 453          */
 454         public static function getDynamicStylesheetQuery() {
 455                 global $wgSquidMaxage;
 456
 457                 return array(
 458                                 'action' => 'raw',
 459                                 'maxage' => $wgSquidMaxage,
 460                                 'usemsgcache' => 'yes',
 461                                 'ctype' => 'text/css',
 462                                 'smaxage' => $wgSquidMaxage,
 463                         );
 464         }
 465
 466         /**
 467          * Add skin specific stylesheets
 468          * @param $out OutputPage
 469          * @delete
 470          */
 471         abstract function setupSkinUserCss( OutputPage $out );
 472
 473         function getPageClasses( $title ) {
 474                 $numeric = 'ns-' . $title->getNamespace();
 475
 476                 if ( $title->getNamespace() == NS_SPECIAL ) {
 477                         $type = 'ns-special';
 478                         // bug 23315: provide a class based on the canonical special page name without subpages
 479                         list( $canonicalName ) = SpecialPage::resolveAliasWithSubpage( $title->getDBkey() );
 480                         if ( $canonicalName ) {
 481                                 $type .= ' ' . Sanitizer::escapeClass( "mw-special-$canonicalName" );
 482                         } else {
 483                                 $type .= ' mw-invalidspecialpage';
 484                         }
 485                 } elseif ( $title->isTalkPage() ) {
 486                         $type = 'ns-talk';
 487                 } else {
 488                         $type = 'ns-subject';
 489                 }
 490
 491                 $name = Sanitizer::escapeClass( 'page-' . $title->getPrefixedText() );
 492
 493                 return "$numeric $type $name";
 494         }
 495
 496         /**
 497          * This will be called by OutputPage::headElement when it is creating the
 498          * <body> tag, skins can override it if they have a need to add in any
 499          * body attributes or classes of their own.
 500          */
 501         function addToBodyAttributes( $out, &$bodyAttrs ) {
 502                 // does nothing by default
 503         }
 504
 505         /**
 506          * URL to the logo
 507          */
 508         function getLogo() {
 509                 global $wgLogo;
 510                 return $wgLogo;
 511         }
 512
 513         /**
 514          * The format without an explicit $out argument is deprecated
 515          */
 516         function getCategoryLinks( OutputPage $out=null ) {
 517                 global $wgUseCategoryBrowser, $wgContLang;
 518
 519                 if ( count( $out->mCategoryLinks ) == 0 ) {
 520                         return '';
 521                 }
 522
 523                 # Separator
 524                 $sep = wfMsgExt( 'catseparator', array( 'parsemag', 'escapenoentities' ) );
 525
 526                 // Use Unicode bidi embedding override characters,
 527                 // to make sure links don't smash each other up in ugly ways.
 528                 $dir = $wgContLang->getDir();
 529                 $embed = "<span dir='$dir'>";
 530                 $pop = '</span>';
 531
 532                 $allCats = $out->getCategoryLinks();
 533                 $s = '';
 534                 $colon = wfMsgExt( 'colon-separator', 'escapenoentities' );
 535
 536                 if ( !empty( $allCats['normal'] ) ) {
 537                         $t = $embed . implode( "{$pop} {$sep} {$embed}" , $allCats['normal'] ) . $pop;
 538
 539                         $msg = wfMsgExt( 'pagecategories', array( 'parsemag', 'escapenoentities' ), count( $allCats['normal'] ) );
 540                         $s .= '<div id="mw-normal-catlinks">' .
 541                                 $this->link( Title::newFromText( wfMsgForContent( 'pagecategorieslink' ) ), $msg )
 542                                 . $colon . $t . '</div>';
 543                 }
 544
 545                 # Hidden categories
 546                 if ( isset( $allCats['hidden'] ) ) {
 547                         if ( $this->getContext()->getUser()->getBoolOption( 'showhiddencats' ) ) {
 548                                 $class = 'mw-hidden-cats-user-shown';
 549                         } elseif ( $this->getTitle()->getNamespace() == NS_CATEGORY ) {
 550                                 $class = 'mw-hidden-cats-ns-shown';
 551                         } else {
 552                                 $class = 'mw-hidden-cats-hidden';
 553                         }
 554
 555                         $s .= "<div id=\"mw-hidden-catlinks\" class=\"$class\">" .
 556                                 wfMsgExt( 'hidden-categories', array( 'parsemag', 'escapenoentities' ), count( $allCats['hidden'] ) ) .
 557                                 $colon . $embed . implode( "$pop $sep $embed", $allCats['hidden'] ) . $pop .
 558                                 '</div>';
 559                 }
 560
 561                 # optional 'dmoz-like' category browser. Will be shown under the list
 562                 # of categories an article belong to
 563                 if ( $wgUseCategoryBrowser ) {
 564                         $s .= '<br /><hr />';
 565
 566                         # get a big array of the parents tree
 567                         $parenttree = $this->getTitle()->getParentCategoryTree();
 568                         # Skin object passed by reference cause it can not be
 569                         # accessed under the method subfunction drawCategoryBrowser
 570                         $tempout = explode( "\n", $this->drawCategoryBrowser( $parenttree, $this ) );
 571                         # Clean out bogus first entry and sort them
 572                         unset( $tempout[0] );
 573                         asort( $tempout );
 574                         # Output one per line
 575                         $s .= implode( "<br />\n", $tempout );
 576                 }
 577
 578                 return $s;
 579         }
 580
 581         /**
 582          * Render the array as a serie of links.
 583          * @param $tree Array: categories tree returned by Title::getParentCategoryTree
 584          * @param &skin Object: skin passed by reference
 585          * @return String separated by &gt;, terminate with "\n"
 586          */
 587         function drawCategoryBrowser( $tree, &$skin ) {
 588                 $return = '';
 589
 590                 foreach ( $tree as $element => $parent ) {
 591                         if ( empty( $parent ) ) {
 592                                 # element start a new list
 593                                 $return .= "\n";
 594                         } else {
 595                                 # grab the others elements
 596                                 $return .= $this->drawCategoryBrowser( $parent, $skin ) . ' &gt; ';
 597                         }
 598
 599                         # add our current element to the list
 600                         $eltitle = Title::newFromText( $element );
 601                         $return .=  $skin->link( $eltitle, $eltitle->getText() );
 602                 }
 603
 604                 return $return;
 605         }
 606
 607         /**
 608          * The ->getCategories() form is deprecated, please instead use
 609          * the ->getCategories( $out ) form with whatout OutputPage is on hand
 610          */
 611         function getCategories( OutputPage $out=null ) {
 612
 613                 $catlinks = $this->getCategoryLinks( $out );
 614
 615                 $classes = 'catlinks';
 616
 617                 // Check what we're showing
 618                 $allCats = $out->getCategoryLinks();
 619                 $showHidden = $this->getContext()->getUser()->getBoolOption( 'showhiddencats' ) ||
 620                                                 $this->getTitle()->getNamespace() == NS_CATEGORY;
 621
 622                 if ( empty( $allCats['normal'] ) && !( !empty( $allCats['hidden'] ) && $showHidden ) ) {
 623                         $classes .= ' catlinks-allhidden';
 624                 }
 625
 626                 return "<div id='catlinks' class='$classes'>{$catlinks}</div>";
 627         }
 628
 629         /**
 630          * This runs a hook to allow extensions placing their stuff after content
 631          * and article metadata (e.g. categories).
 632          * Note: This function has nothing to do with afterContent().
 633          *
 634          * This hook is placed here in order to allow using the same hook for all
 635          * skins, both the SkinTemplate based ones and the older ones, which directly
 636          * use this class to get their data.
 637          *
 638          * The output of this function gets processed in SkinTemplate::outputPage() for
 639          * the SkinTemplate based skins, all other skins should directly echo it.
 640          *
 641          * Returns an empty string by default, if not changed by any hook function.
 642          */
 643         protected function afterContentHook() {
 644                 $data = '';
 645
 646                 if ( wfRunHooks( 'SkinAfterContent', array( &$data, $this ) ) ) {
 647                         // adding just some spaces shouldn't toggle the output
 648                         // of the whole <div/>, so we use trim() here
 649                         if ( trim( $data ) != '' ) {
 650                                 // Doing this here instead of in the skins to
 651                                 // ensure that the div has the same ID in all
 652                                 // skins
 653                                 $data = "<div id='mw-data-after-content'>\n" .
 654                                         "\t$data\n" .
 655                                         "</div>\n";
 656                         }
 657                 } else {
 658                         wfDebug( "Hook SkinAfterContent changed output processing.\n" );
 659                 }
 660
 661                 return $data;
 662         }
 663
 664         /**
 665          * Generate debug data HTML for displaying at the bottom of the main content
 666          * area.
 667          * @return String HTML containing debug data, if enabled (otherwise empty).
 668          */
 669         protected function generateDebugHTML( OutputPage $out ) {
 670                 global $wgShowDebug;
 671
 672                 if ( $wgShowDebug ) {
 673                         $listInternals = $this->formatDebugHTML( $out->mDebugtext );
 674                         return "\n<hr />\n<strong>Debug data:</strong><ul id=\"mw-debug-html\">" .
 675                                 $listInternals . "</ul>\n";
 676                 }
 677
 678                 return '';
 679         }
 680
 681         private function formatDebugHTML( $debugText ) {
 682                 global $wgDebugTimestamps;
 683
 684                 $lines = explode( "\n", $debugText );
 685                 $curIdent = 0;
 686                 $ret = '<li>';
 687
 688                 foreach ( $lines as $line ) {
 689                         $pre = '';
 690                         if ( $wgDebugTimestamps ) {
 691                                 $matches = array();
 692                                 if ( preg_match( '/^(\d+\.\d+\s{2})/', $line, $matches ) ) {
 693                                         $pre = $matches[1];
 694                                         $line = substr( $line, strlen( $pre ) );
 695                                 }
 696                         }
 697                         $display = ltrim( $line );
 698                         $ident = strlen( $line ) - strlen( $display );
 699                         $diff = $ident - $curIdent;
 700
 701                         $display = $pre . $display;
 702                         if ( $display == '' ) {
 703                                 $display = "\xc2\xa0";
 704                         }
 705
 706                         if ( !$ident && $diff < 0 && substr( $display, 0, 9 ) != 'Entering ' && substr( $display, 0, 8 ) != 'Exiting ' ) {
 707                                 $ident = $curIdent;
 708                                 $diff = 0;
 709                                 $display = '<span style="background:yellow;">' . htmlspecialchars( $display ) . '</span>';
 710                         } else {
 711                                 $display = htmlspecialchars( $display );
 712                         }
 713
 714                         if ( $diff < 0 ) {
 715                                 $ret .= str_repeat( "</li></ul>\n", -$diff ) . "</li><li>\n";
 716                         } elseif ( $diff == 0 ) {
 717                                 $ret .= "</li><li>\n";
 718                         } else {
 719                                 $ret .= str_repeat( "<ul><li>\n", $diff );
 720                         }
 721                         $ret .= "<tt>$display</tt>\n";
 722
 723                         $curIdent = $ident;
 724                 }
 725
 726                 $ret .= str_repeat( '</li></ul>', $curIdent ) . '</li>';
 727
 728                 return $ret;
 729         }
 730
 731         /**
 732          * This gets called shortly before the </body> tag.
 733          * @param $out OutputPage object
 734          * @return String HTML-wrapped JS code to be put before </body>
 735          */
 736         function bottomScripts( $out ) {
 737                 $bottomScriptText = "\n" . $out->getHeadScripts( $this );
 738                 wfRunHooks( 'SkinAfterBottomScripts', array( $this, &$bottomScriptText ) );
 739
 740                 return $bottomScriptText;
 741         }
 742
 743         /** @return string Retrievied from HTML text */
 744         function printSource() {
 745                 $url = htmlspecialchars( $this->getTitle()->getFullURL() );
 746                 return wfMsg( 'retrievedfrom', '<a href="' . $url . '">' . $url . '</a>' );
 747         }
 748
 749         function getUndeleteLink() {
 750                 $action = $this->getContext()->getRequest()->getVal( 'action', 'view' );
 751
 752                 if ( $this->getContext()->getUser()->isAllowed( 'deletedhistory' ) &&
 753                         ( $this->getTitle()->getArticleId() == 0 || $action == 'history' ) ) {
 754                         $n = $this->getTitle()->isDeleted();
 755
 756                         if ( $n ) {
 757                                 if ( $this->getContext()->getUser()->isAllowed( 'undelete' ) ) {
 758                                         $msg = 'thisisdeleted';
 759                                 } else {
 760                                         $msg = 'viewdeleted';
 761                                 }
 762
 763                                 return wfMsg(
 764                                         $msg,
 765                                         $this->link(
 766                                                 SpecialPage::getTitleFor( 'Undelete', $this->getTitle()->getPrefixedDBkey() ),
 767                                                 wfMsgExt( 'restorelink', array( 'parsemag', 'escape' ), $this->getContext()->getLang()->formatNum( $n ) ),
 768                                                 array(),
 769                                                 array(),
 770                                                 array( 'known', 'noclasses' )
 771                                         )
 772                                 );
 773                         }
 774                 }
 775
 776                 return '';
 777         }
 778
 779         /**
 780          * The format without an explicit $out argument is deprecated
 781          */
 782         function subPageSubtitle( OutputPage $out=null ) {
 783                 $out = $this->getContext()->getOutput();
 784                 $subpages = '';
 785
 786                 if ( !wfRunHooks( 'SkinSubPageSubtitle', array( &$subpages, $this, $out ) ) ) {
 787                         return $subpages;
 788                 }
 789
 790                 if ( $out->isArticle() && MWNamespace::hasSubpages( $out->getTitle()->getNamespace() ) ) {
 791                         $ptext = $this->getTitle()->getPrefixedText();
 792                         if ( preg_match( '/\//', $ptext ) ) {
 793                                 $links = explode( '/', $ptext );
 794                                 array_pop( $links );
 795                                 $c = 0;
 796                                 $growinglink = '';
 797                                 $display = '';
 798
 799                                 foreach ( $links as $link ) {
 800                                         $growinglink .= $link;
 801                                         $display .= $link;
 802                                         $linkObj = Title::newFromText( $growinglink );
 803
 804                                         if ( is_object( $linkObj ) && $linkObj->exists() ) {
 805                                                 $getlink = $this->link(
 806                                                         $linkObj,
 807                                                         htmlspecialchars( $display ),
 808                                                         array(),
 809                                                         array(),
 810                                                         array( 'known', 'noclasses' )
 811                                                 );
 812
 813                                                 $c++;
 814
 815                                                 if ( $c > 1 ) {
 816                                                         $subpages .= wfMsgExt( 'pipe-separator', 'escapenoentities' );
 817                                                 } else  {
 818                                                         $subpages .= '&lt; ';
 819                                                 }
 820
 821                                                 $subpages .= $getlink;
 822                                                 $display = '';
 823                                         } else {
 824                                                 $display .= '/';
 825                                         }
 826                                         $growinglink .= '/';
 827                                 }
 828                         }
 829                 }
 830
 831                 return $subpages;
 832         }
 833
 834         /**
 835          * Returns true if the IP should be shown in the header
 836          */
 837         function showIPinHeader() {
 838                 global $wgShowIPinHeader;
 839                 return $wgShowIPinHeader && session_id() != '';
 840         }
 841
 842         function getSearchLink() {
 843                 $searchPage = SpecialPage::getTitleFor( 'Search' );
 844                 return $searchPage->getLocalURL();
 845         }
 846
 847         function escapeSearchLink() {
 848                 return htmlspecialchars( $this->getSearchLink() );
 849         }
 850
 851         function getCopyright( $type = 'detect' ) {
 852                 global $wgRightsPage, $wgRightsUrl, $wgRightsText;
 853
 854                 if ( $type == 'detect' ) {
 855                         $diff = $this->getContext()->getRequest()->getVal( 'diff' );
 856
 857                         if ( is_null( $diff ) && !$this->isRevisionCurrent() && wfMsgForContent( 'history_copyright' ) !== '-' ) {
 858                                 $type = 'history';
 859                         } else {
 860                                 $type = 'normal';
 861                         }
 862                 }
 863
 864                 if ( $type == 'history' ) {
 865                         $msg = 'history_copyright';
 866                 } else {
 867                         $msg = 'copyright';
 868                 }
 869
 870                 $out = '';
 871
 872                 if ( $wgRightsPage ) {
 873                         $title = Title::newFromText( $wgRightsPage );
 874                         $link = $this->linkKnown( $title, $wgRightsText );
 875                 } elseif ( $wgRightsUrl ) {
 876                         $link = $this->makeExternalLink( $wgRightsUrl, $wgRightsText );
 877                 } elseif ( $wgRightsText ) {
 878                         $link = $wgRightsText;
 879                 } else {
 880                         # Give up now
 881                         return $out;
 882                 }
 883
 884                 // Allow for site and per-namespace customization of copyright notice.
 885                 $forContent = true;
 886
 887                 wfRunHooks( 'SkinCopyrightFooter', array( $this->getTitle(), $type, &$msg, &$link, &$forContent ) );
 888
 889                 if ( $forContent ) {
 890                         $out .= wfMsgForContent( $msg, $link );
 891                 } else {
 892                         $out .= wfMsg( $msg, $link );
 893                 }
 894
 895                 return $out;
 896         }
 897
 898         function getCopyrightIcon() {
 899                 global $wgRightsUrl, $wgRightsText, $wgRightsIcon, $wgCopyrightIcon;
 900
 901                 $out = '';
 902
 903                 if ( isset( $wgCopyrightIcon ) && $wgCopyrightIcon ) {
 904                         $out = $wgCopyrightIcon;
 905                 } elseif ( $wgRightsIcon ) {
 906                         $icon = htmlspecialchars( $wgRightsIcon );
 907
 908                         if ( $wgRightsUrl ) {
 909                                 $url = htmlspecialchars( $wgRightsUrl );
 910                                 $out .= '<a href="' . $url . '">';
 911                         }
 912
 913                         $text = htmlspecialchars( $wgRightsText );
 914                         $out .= "<img src=\"$icon\" alt=\"$text\" width=\"88\" height=\"31\" />";
 915
 916                         if ( $wgRightsUrl ) {
 917                                 $out .= '</a>';
 918                         }
 919                 }
 920
 921                 return $out;
 922         }
 923
 924         /**
 925          * Gets the powered by MediaWiki icon.
 926          * @return string
 927          */
 928         function getPoweredBy() {
 929                 global $wgStylePath;
 930
 931                 $url = htmlspecialchars( "$wgStylePath/common/images/poweredby_mediawiki_88x31.png" );
 932                 $text = '<a href="http://www.mediawiki.org/"><img src="' . $url . '" height="31" width="88" alt="Powered by MediaWiki" /></a>';
 933                 wfRunHooks( 'SkinGetPoweredBy', array( &$text, $this ) );
 934                 return $text;
 935         }
 936
 937         /**
 938          * Get the timestamp of the latest revision, formatted in user language
 939          *
 940          * @param $article Article object. Used if we're working with the current revision
 941          * @return String
 942          */
 943         protected function lastModified( $article ) {
 944                 if ( !$this->isRevisionCurrent() ) {
 945                         $timestamp = Revision::getTimestampFromId( $this->getTitle(), $this->mRevisionId );
 946                 } else {
 947                         $timestamp = $article->getTimestamp();
 948                 }
 949
 950                 if ( $timestamp ) {
 951                         $d = $this->getContext()->getLang()->date( $timestamp, true );
 952                         $t = $this->getContext()->getLang()->time( $timestamp, true );
 953                         $s = ' ' . wfMsg( 'lastmodifiedat', $d, $t );
 954                 } else {
 955                         $s = '';
 956                 }
 957
 958                 if ( wfGetLB()->getLaggedSlaveMode() ) {
 959                         $s .= ' <strong>' . wfMsg( 'laggedslavemode' ) . '</strong>';
 960                 }
 961
 962                 return $s;
 963         }
 964
 965         function logoText( $align = '' ) {
 966                 if ( $align != '' ) {
 967                         $a = " align='{$align}'";
 968                 } else {
 969                         $a = '';
 970                 }
 971
 972                 $mp = wfMsg( 'mainpage' );
 973                 $mptitle = Title::newMainPage();
 974                 $url = ( is_object( $mptitle ) ? $mptitle->escapeLocalURL() : '' );
 975
 976                 $logourl = $this->getLogo();
 977                 $s = "<a href='{$url}'><img{$a} src='{$logourl}' alt='[{$mp}]' /></a>";
 978
 979                 return $s;
 980         }
 981
 982         /**
 983          * Renders a $wgFooterIcons icon acording to the method's arguments
 984          * @param $icon Array: The icon to build the html for, see $wgFooterIcons for the format of this array
 985          * @param $withImage Boolean: Whether to use the icon's image or output a text-only footericon
 986          */
 987         function makeFooterIcon( $icon, $withImage = 'withImage' ) {
 988                 if ( is_string( $icon ) ) {
 989                         $html = $icon;
 990                 } else { // Assuming array
 991                         $url = isset($icon["url"]) ? $icon["url"] : null;
 992                         unset( $icon["url"] );
 993                         if ( isset( $icon["src"] ) && $withImage === 'withImage' ) {
 994                                 $html = Html::element( 'img', $icon ); // do this the lazy way, just pass icon data as an attribute array
 995                         } else {
 996                                 $html = htmlspecialchars( $icon["alt"] );
 997                         }
 998                         if ( $url ) {
 999                                 $html = Html::rawElement( 'a', array( "href" => $url ), $html );
1000                         }
1001                 }
1002                 return $html;
1003         }
1004
1005         /**
1006          * Gets the link to the wiki's main page.
1007          * @return string
1008          */
1009         function mainPageLink() {
1010                 $s = $this->link(
1011                         Title::newMainPage(),
1012                         wfMsg( 'mainpage' ),
1013                         array(),
1014                         array(),
1015                         array( 'known', 'noclasses' )
1016                 );
1017
1018                 return $s;
1019         }
1020
1021         public function footerLink( $desc, $page ) {
1022                 // if the link description has been set to "-" in the default language,
1023                 if ( wfMsgForContent( $desc )  == '-' ) {
1024                         // then it is disabled, for all languages.
1025                         return '';
1026                 } else {
1027                         // Otherwise, we display the link for the user, described in their
1028                         // language (which may or may not be the same as the default language),
1029                         // but we make the link target be the one site-wide page.
1030                         $title = Title::newFromText( wfMsgForContent( $page ) );
1031
1032                         return $this->linkKnown(
1033                                 $title,
1034                                 wfMsgExt( $desc, array( 'parsemag', 'escapenoentities' ) )
1035                         );
1036                 }
1037         }
1038
1039         /**
1040          * Gets the link to the wiki's privacy policy page.
1041          */
1042         function privacyLink() {
1043                 return $this->footerLink( 'privacy', 'privacypage' );
1044         }
1045
1046         /**
1047          * Gets the link to the wiki's about page.
1048          */
1049         function aboutLink() {
1050                 return $this->footerLink( 'aboutsite', 'aboutpage' );
1051         }
1052
1053         /**
1054          * Gets the link to the wiki's general disclaimers page.
1055          */
1056         function disclaimerLink() {
1057                 return $this->footerLink( 'disclaimers', 'disclaimerpage' );
1058         }
1059
1060         /**
1061          * Return URL options for the 'edit page' link.
1062          * This may include an 'oldid' specifier, if the current page view is such.
1063          *
1064          * @return array
1065          * @private
1066          */
1067         function editUrlOptions() {
1068                 $options = array( 'action' => 'edit' );
1069
1070                 if ( !$this->isRevisionCurrent() ) {
1071                         $options['oldid'] = intval( $this->mRevisionId );
1072                 }
1073
1074                 return $options;
1075         }
1076
1077         function showEmailUser( $id ) {
1078                 $targetUser = User::newFromId( $id );
1079                 return $this->getContext()->getUser()->canSendEmail() && # the sending user must have a confirmed email address
1080                         $targetUser->canReceiveEmail(); # the target user must have a confirmed email address and allow emails from users
1081         }
1082
1083         /**
1084          * Return a fully resolved style path url to images or styles stored in the common folder.
1085          * This method returns a url resolved using the configured skin style path
1086          * and includes the style version inside of the url.
1087          * @param $name String: The name or path of a skin resource file
1088          * @return String The fully resolved style path url including styleversion
1089          */
1090         function getCommonStylePath( $name ) {
1091                 global $wgStylePath, $wgStyleVersion;
1092                 return "$wgStylePath/common/$name?$wgStyleVersion";
1093         }
1094
1095         /**
1096          * Return a fully resolved style path url to images or styles stored in the curent skins's folder.
1097          * This method returns a url resolved using the configured skin style path
1098          * and includes the style version inside of the url.
1099          * @param $name String: The name or path of a skin resource file
1100          * @return String The fully resolved style path url including styleversion
1101          */
1102         function getSkinStylePath( $name ) {
1103                 global $wgStylePath, $wgStyleVersion;
1104                 return "$wgStylePath/{$this->stylename}/$name?$wgStyleVersion";
1105         }
1106
1107         /* these are used extensively in SkinTemplate, but also some other places */
1108         static function makeMainPageUrl( $urlaction = '' ) {
1109                 $title = Title::newMainPage();
1110                 self::checkTitle( $title, '' );
1111
1112                 return $title->getLocalURL( $urlaction );
1113         }
1114
1115         static function makeSpecialUrl( $name, $urlaction = '' ) {
1116                 $title = SpecialPage::getTitleFor( $name );
1117                 return $title->getLocalURL( $urlaction );
1118         }
1119
1120         static function makeSpecialUrlSubpage( $name, $subpage, $urlaction = '' ) {
1121                 $title = SpecialPage::getSafeTitleFor( $name, $subpage );
1122                 return $title->getLocalURL( $urlaction );
1123         }
1124
1125         static function makeI18nUrl( $name, $urlaction = '' ) {
1126                 $title = Title::newFromText( wfMsgForContent( $name ) );
1127                 self::checkTitle( $title, $name );
1128                 return $title->getLocalURL( $urlaction );
1129         }
1130
1131         static function makeUrl( $name, $urlaction = '' ) {
1132                 $title = Title::newFromText( $name );
1133                 self::checkTitle( $title, $name );
1134
1135                 return $title->getLocalURL( $urlaction );
1136         }
1137
1138         /**
1139          * If url string starts with http, consider as external URL, else
1140          * internal
1141          */
1142         static function makeInternalOrExternalUrl( $name ) {
1143                 if ( preg_match( '/^(?:' . wfUrlProtocols() . ')/', $name ) ) {
1144                         return $name;
1145                 } else {
1146                         return self::makeUrl( $name );
1147                 }
1148         }
1149
1150         # this can be passed the NS number as defined in Language.php
1151         static function makeNSUrl( $name, $urlaction = '', $namespace = NS_MAIN ) {
1152                 $title = Title::makeTitleSafe( $namespace, $name );
1153                 self::checkTitle( $title, $name );
1154
1155                 return $title->getLocalURL( $urlaction );
1156         }
1157
1158         /* these return an array with the 'href' and boolean 'exists' */
1159         static function makeUrlDetails( $name, $urlaction = '' ) {
1160                 $title = Title::newFromText( $name );
1161                 self::checkTitle( $title, $name );
1162
1163                 return array(
1164                         'href' => $title->getLocalURL( $urlaction ),
1165                         'exists' => $title->getArticleID() != 0,
1166                 );
1167         }
1168
1169         /**
1170          * Make URL details where the article exists (or at least it's convenient to think so)
1171          */
1172         static function makeKnownUrlDetails( $name, $urlaction = '' ) {
1173                 $title = Title::newFromText( $name );
1174                 self::checkTitle( $title, $name );
1175
1176                 return array(
1177                         'href' => $title->getLocalURL( $urlaction ),
1178                         'exists' => true
1179                 );
1180         }
1181
1182         # make sure we have some title to operate on
1183         static function checkTitle( &$title, $name ) {
1184                 if ( !is_object( $title ) ) {
1185                         $title = Title::newFromText( $name );
1186                         if ( !is_object( $title ) ) {
1187                                 $title = Title::newFromText( '--error: link target missing--' );
1188                         }
1189                 }
1190         }
1191
1192         /**
1193          * Build an array that represents the sidebar(s), the navigation bar among them
1194          *
1195          * @return array
1196          */
1197         function buildSidebar() {
1198                 global $parserMemc, $wgEnableSidebarCache, $wgSidebarCacheExpiry;
1199                 wfProfileIn( __METHOD__ );
1200
1201                 $key = wfMemcKey( 'sidebar', $this->getContext()->getLang()->getCode() );
1202
1203                 if ( $wgEnableSidebarCache ) {
1204                         $cachedsidebar = $parserMemc->get( $key );
1205                         if ( $cachedsidebar ) {
1206                                 wfProfileOut( __METHOD__ );
1207                                 return $cachedsidebar;
1208                         }
1209                 }
1210
1211                 $bar = array();
1212                 $this->addToSidebar( $bar, 'sidebar' );
1213
1214                 wfRunHooks( 'SkinBuildSidebar', array( $this, &$bar ) );
1215                 if ( $wgEnableSidebarCache ) {
1216                         $parserMemc->set( $key, $bar, $wgSidebarCacheExpiry );
1217                 }
1218
1219                 wfProfileOut( __METHOD__ );
1220                 return $bar;
1221         }
1222         /**
1223          * Add content from a sidebar system message
1224          * Currently only used for MediaWiki:Sidebar (but may be used by Extensions)
1225          *
1226          * This is just a wrapper around addToSidebarPlain() for backwards compatibility
1227          *
1228          * @param &$bar array
1229          * @param $message String
1230          */
1231         function addToSidebar( &$bar, $message ) {
1232                 $this->addToSidebarPlain( $bar, wfMsgForContentNoTrans( $message ) );
1233         }
1234
1235         /**
1236          * Add content from plain text
1237          * @since 1.17
1238          * @param &$bar array
1239          * @param $text string
1240          */
1241         function addToSidebarPlain( &$bar, $text ) {
1242                 $lines = explode( "\n", $text );
1243                 $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.
1244
1245                 $heading = '';
1246
1247                 foreach ( $lines as $line ) {
1248                         if ( strpos( $line, '*' ) !== 0 ) {
1249                                 continue;
1250                         }
1251
1252                         if ( strpos( $line, '**' ) !== 0 ) {
1253                                 $heading = trim( $line, '* ' );
1254                                 if ( !array_key_exists( $heading, $bar ) ) {
1255                                         $bar[$heading] = array();
1256                                 }
1257                         } else {
1258                                 $line = trim( $line, '* ' );
1259
1260                                 if ( strpos( $line, '|' ) !== false ) { // sanity check
1261                                         $line = MessageCache::singleton()->transform( $line, false, null, $this->getTitle() );
1262                                         $line = array_map( 'trim', explode( '|', $line, 2 ) );
1263                                         $link = wfMsgForContent( $line[0] );
1264
1265                                         if ( $link == '-' ) {
1266                                                 continue;
1267                                         }
1268
1269                                         $text = wfMsgExt( $line[1], 'parsemag' );
1270
1271                                         if ( wfEmptyMsg( $line[1] ) ) {
1272                                                 $text = $line[1];
1273                                         }
1274
1275                                         if ( wfEmptyMsg( $line[0] ) ) {
1276                                                 $link = $line[0];
1277                                         }
1278
1279                                         if ( preg_match( '/^(?:' . wfUrlProtocols() . ')/', $link ) ) {
1280                                                 $href = $link;
1281                                         } else {
1282                                                 $title = Title::newFromText( $link );
1283
1284                                                 if ( $title ) {
1285                                                         $title = $title->fixSpecialName();
1286                                                         $href = $title->getLocalURL();
1287                                                 } else {
1288                                                         $href = 'INVALID-TITLE';
1289                                                 }
1290                                         }
1291
1292                                         $bar[$heading][] = array(
1293                                                 'text' => $text,
1294                                                 'href' => $href,
1295                                                 'id' => 'n-' . strtr( $line[1], ' ', '-' ),
1296                                                 'active' => false
1297                                         );
1298                                 } else if ( ( substr( $line, 0, 2 ) == '{{' ) && ( substr( $line, -2 ) == '}}' ) ) {
1299                                         global $wgParser;
1300
1301                                         $line = substr( $line, 2, strlen( $line ) - 4 );
1302
1303                                         $options = new ParserOptions();
1304                                         $options->setEditSection( false );
1305                                         $options->setInterfaceMessage( true );
1306                                         $wikiBar[$heading] = $wgParser->parse( wfMsgForContentNoTrans( $line ) , $this->getTitle(), $options )->getText();
1307                                 } else {
1308                                         continue;
1309                                 }
1310                         }
1311                 }
1312
1313                 if ( count( $wikiBar ) > 0 ) {
1314                         $bar = array_merge( $bar, $wikiBar );
1315                 }
1316
1317                 return $bar;
1318         }
1319
1320         /**
1321          * Should we include common/wikiprintable.css?  Skins that have their own
1322          * print stylesheet should override this and return false.  (This is an
1323          * ugly hack to get Monobook to play nicely with
1324          * OutputPage::headElement().)
1325          *
1326          * @return bool
1327          */
1328         public function commonPrintStylesheet() {
1329                 return true;
1330         }
1331
1332         /**
1333          * Gets new talk page messages for the current user.
1334          * @return MediaWiki message or if no new talk page messages, nothing
1335          */
1336         function getNewtalks() {
1337                 $out = $this->getContext()->getOutput();
1338
1339                 $newtalks = $this->getContext()->getUser()->getNewMessageLinks();
1340                 $ntl = '';
1341
1342                 if ( count( $newtalks ) == 1 && $newtalks[0]['wiki'] === wfWikiID() ) {
1343                         $userTitle = $this->getUser()->getUserPage();
1344                         $userTalkTitle = $userTitle->getTalkPage();
1345
1346                         if ( !$userTalkTitle->equals( $out->getTitle() ) ) {
1347                                 $newMessagesLink = $this->link(
1348                                         $userTalkTitle,
1349                                         wfMsgHtml( 'newmessageslink' ),
1350                                         array(),
1351                                         array( 'redirect' => 'no' ),
1352                                         array( 'known', 'noclasses' )
1353                                 );
1354
1355                                 $newMessagesDiffLink = $this->link(
1356                                         $userTalkTitle,
1357                                         wfMsgHtml( 'newmessagesdifflink' ),
1358                                         array(),
1359                                         array( 'diff' => 'cur' ),
1360                                         array( 'known', 'noclasses' )
1361                                 );
1362
1363                                 $ntl = wfMsg(
1364                                         'youhavenewmessages',
1365                                         $newMessagesLink,
1366                                         $newMessagesDiffLink
1367                                 );
1368                                 # Disable Squid cache
1369                                 $out->setSquidMaxage( 0 );
1370                         }
1371                 } elseif ( count( $newtalks ) ) {
1372                         // _>" " for BC <= 1.16
1373                         $sep = str_replace( '_', ' ', wfMsgHtml( 'newtalkseparator' ) );
1374                         $msgs = array();
1375
1376                         foreach ( $newtalks as $newtalk ) {
1377                                 $msgs[] = Xml::element(
1378                                         'a',
1379                                         array( 'href' => $newtalk['link'] ), $newtalk['wiki']
1380                                 );
1381                         }
1382                         $parts = implode( $sep, $msgs );
1383                         $ntl = wfMsgHtml( 'youhavenewmessagesmulti', $parts );
1384                         $out->setSquidMaxage( 0 );
1385                 }
1386
1387                 return $ntl;
1388         }
1389
1390         /**
1391          * Get a cached notice
1392          *
1393          * @param $name String: message name, or 'default' for $wgSiteNotice
1394          * @return String: HTML fragment
1395          */
1396         private function getCachedNotice( $name ) {
1397                 global $wgRenderHashAppend, $parserMemc;
1398
1399                 wfProfileIn( __METHOD__ );
1400
1401                 $needParse = false;
1402
1403                 if( $name === 'default' ) {
1404                         // special case
1405                         global $wgSiteNotice;
1406                         $notice = $wgSiteNotice;
1407                         if( empty( $notice ) ) {
1408                                 wfProfileOut( __METHOD__ );
1409                                 return false;
1410                         }
1411                 } else {
1412                         $msg = wfMessage( $name )->inContentLanguage();
1413                         if( $msg->isDisabled() ) {
1414                                 wfProfileOut( __METHOD__ );
1415                                 return false;
1416                         }
1417                         $notice = $msg->plain();
1418                 }
1419
1420                 // Use the extra hash appender to let eg SSL variants separately cache.
1421                 $key = wfMemcKey( $name . $wgRenderHashAppend );
1422                 $cachedNotice = $parserMemc->get( $key );
1423                 if( is_array( $cachedNotice ) ) {
1424                         if( md5( $notice ) == $cachedNotice['hash'] ) {
1425                                 $notice = $cachedNotice['html'];
1426                         } else {
1427                                 $needParse = true;
1428                         }
1429                 } else {
1430                         $needParse = true;
1431                 }
1432
1433                 if ( $needParse ) {
1434                         $parsed = $this->getContext()->getOutput()->parse( $notice );
1435                         $parserMemc->set( $key, array( 'html' => $parsed, 'hash' => md5( $notice ) ), 600 );
1436                         $notice = $parsed;
1437                 }
1438
1439                 $notice = '<div id="localNotice">' .$notice . '</div>';
1440                 wfProfileOut( __METHOD__ );
1441                 return $notice;
1442         }
1443
1444         /**
1445          * Get a notice based on page's namespace
1446          *
1447          * @return String: HTML fragment
1448          */
1449         function getNamespaceNotice() {
1450                 wfProfileIn( __METHOD__ );
1451
1452                 $key = 'namespacenotice-' . $this->getTitle()->getNsText();
1453                 $namespaceNotice = $this->getCachedNotice( $key );
1454                 if ( $namespaceNotice && substr( $namespaceNotice, 0, 7 ) != '<p>&lt;' ) {
1455                         $namespaceNotice = '<div id="namespacebanner">' . $namespaceNotice . '</div>';
1456                 } else {
1457                         $namespaceNotice = '';
1458                 }
1459
1460                 wfProfileOut( __METHOD__ );
1461                 return $namespaceNotice;
1462         }
1463
1464         /**
1465          * Get the site notice
1466          *
1467          * @return String: HTML fragment
1468          */
1469         function getSiteNotice() {
1470                 wfProfileIn( __METHOD__ );
1471                 $siteNotice = '';
1472
1473                 if ( wfRunHooks( 'SiteNoticeBefore', array( &$siteNotice, $this ) ) ) {
1474                         if ( is_object( $this->getContext()->getUser() ) && $this->getContext()->getUser()->isLoggedIn() ) {
1475                                 $siteNotice = $this->getCachedNotice( 'sitenotice' );
1476                         } else {
1477                                 $anonNotice = $this->getCachedNotice( 'anonnotice' );
1478                                 if ( !$anonNotice ) {
1479                                         $siteNotice = $this->getCachedNotice( 'sitenotice' );
1480                                 } else {
1481                                         $siteNotice = $anonNotice;
1482                                 }
1483                         }
1484                         if ( !$siteNotice ) {
1485                                 $siteNotice = $this->getCachedNotice( 'default' );
1486                         }
1487                 }
1488
1489                 wfRunHooks( 'SiteNoticeAfter', array( &$siteNotice, $this ) );
1490                 wfProfileOut( __METHOD__ );
1491                 return $siteNotice;
1492         }
1493
1494         /**
1495          * Create a section edit link.  This supersedes editSectionLink() and
1496          * editSectionLinkForOther().
1497          *
1498          * @param $nt      Title  The title being linked to (may not be the same as
1499          *   $wgTitle, if the section is included from a template)
1500          * @param $section string The designation of the section being pointed to,
1501          *   to be included in the link, like "&section=$section"
1502          * @param $tooltip string The tooltip to use for the link: will be escaped
1503          *   and wrapped in the 'editsectionhint' message
1504          * @param $lang    string Language code
1505          * @return         string HTML to use for edit link
1506          */
1507         public function doEditSectionLink( Title $nt, $section, $tooltip = null, $lang = false ) {
1508                 // HTML generated here should probably have userlangattributes
1509                 // added to it for LTR text on RTL pages
1510                 $attribs = array();
1511                 if ( !is_null( $tooltip ) ) {
1512                         # Bug 25462: undo double-escaping.
1513                         $tooltip = Sanitizer::decodeCharReferences( $tooltip );
1514                         $attribs['title'] = wfMsgReal( 'editsectionhint', array( $tooltip ), true, $lang );
1515                 }
1516                 $link = Linker::link( $nt, wfMsgExt( 'editsection', array( 'language' => $lang ) ),
1517                         $attribs,
1518                         array( 'action' => 'edit', 'section' => $section ),
1519                         array( 'noclasses', 'known' )
1520                 );
1521
1522                 # Run the old hook.  This takes up half of the function . . . hopefully
1523                 # we can rid of it someday.
1524                 $attribs = '';
1525                 if ( $tooltip ) {
1526                         $attribs = htmlspecialchars( wfMsgReal( 'editsectionhint', array( $tooltip ), true, $lang ) );
1527                         $attribs = " title=\"$attribs\"";
1528                 }
1529                 $result = null;
1530                 wfRunHooks( 'EditSectionLink', array( &$this, $nt, $section, $attribs, $link, &$result, $lang ) );
1531                 if ( !is_null( $result ) ) {
1532                         # For reverse compatibility, add the brackets *after* the hook is
1533                         # run, and even add them to hook-provided text.  (This is the main
1534                         # reason that the EditSectionLink hook is deprecated in favor of
1535                         # DoEditSectionLink: it can't change the brackets or the span.)
1536                         $result = wfMsgExt( 'editsection-brackets', array( 'escape', 'replaceafter', 'language' => $lang ), $result );
1537                         return "<span class=\"editsection\">$result</span>";
1538                 }
1539
1540                 # Add the brackets and the span, and *then* run the nice new hook, with
1541                 # clean and non-redundant arguments.
1542                 $result = wfMsgExt( 'editsection-brackets', array( 'escape', 'replaceafter', 'language' => $lang ), $link );
1543                 $result = "<span class=\"editsection\">$result</span>";
1544
1545                 wfRunHooks( 'DoEditSectionLink', array( $this, $nt, $section, $tooltip, &$result, $lang ) );
1546                 return $result;
1547         }
1548
1549         /**
1550          * Use PHP's magic __call handler to intercept legacy calls to the linker
1551          * for backwards compatibility.
1552          *
1553          * @param $fname String Name of called method
1554          * @param $args Array Arguments to the method
1555          */
1556         function __call( $fname, $args ) {
1557                 $realFunction = array( 'Linker', $fname );
1558                 if ( is_callable( $realFunction ) ) {
1559                         return call_user_func_array( $realFunction, $args );
1560                 } else {
1561                         $className = get_class( $this );
1562                         throw new MWException( "Call to undefined method $className::$fname" );
1563                 }
1564         }
1565
1566 }