includes/Skin.php

   1 <?php
   2 /**
   3  * @defgroup Skins Skins
   4  */
   5
   6 if ( !defined( 'MEDIAWIKI' ) ) {
   7         die( 1 );
   8 }
   9
  10 /**
  11  * The main skin class that provide methods and properties for all other skins.
  12  * This base class is also the "Standard" skin.
  13  *
  14  * See docs/skin.txt for more information.
  15  *
  16  * @ingroup Skins
  17  */
  18 abstract class Skin extends ContextSource {
  19         protected $skinname = 'standard';
  20         protected $mRelevantTitle = null;
  21         protected $mRelevantUser = null;
  22
  23         /**
  24          * Fetch the set of available skins.
  25          * @return array of strings
  26          */
  27         static function getSkinNames() {
  28                 global $wgValidSkinNames;
  29                 static $skinsInitialised = false;
  30
  31                 if ( !$skinsInitialised || !count( $wgValidSkinNames ) ) {
  32                         # Get a list of available skins
  33                         # Build using the regular expression '^(.*).php$'
  34                         # Array keys are all lower case, array value keep the case used by filename
  35                         #
  36                         wfProfileIn( __METHOD__ . '-init' );
  37
  38                         global $wgStyleDirectory;
  39
  40                         $skinDir = dir( $wgStyleDirectory );
  41
  42                         # while code from www.php.net
  43                         while ( false !== ( $file = $skinDir->read() ) ) {
  44                                 // Skip non-PHP files, hidden files, and '.dep' includes
  45                                 $matches = array();
  46
  47                                 if ( preg_match( '/^([^.]*)\.php$/', $file, $matches ) ) {
  48                                         $aSkin = $matches[1];
  49                                         $wgValidSkinNames[strtolower( $aSkin )] = $aSkin;
  50                                 }
  51                         }
  52                         $skinDir->close();
  53                         $skinsInitialised = true;
  54                         wfProfileOut( __METHOD__ . '-init' );
  55                 }
  56                 return $wgValidSkinNames;
  57         }
  58
  59         /**
  60          * Fetch the list of usable skins in regards to $wgSkipSkins.
  61          * Useful for Special:Preferences and other places where you
  62          * only want to show skins users _can_ use.
  63          * @return array of strings
  64          */
  65         public static function getUsableSkins() {
  66                 global $wgSkipSkins;
  67
  68                 $usableSkins = self::getSkinNames();
  69
  70                 foreach ( $wgSkipSkins as $skip ) {
  71                         unset( $usableSkins[$skip] );
  72                 }
  73
  74                 return $usableSkins;
  75         }
  76
  77         /**
  78          * Normalize a skin preference value to a form that can be loaded.
  79          * If a skin can't be found, it will fall back to the configured
  80          * default (or the old 'Classic' skin if that's broken).
  81          * @param $key String: 'monobook', 'standard', etc.
  82          * @return string
  83          */
  84         static function normalizeKey( $key ) {
  85                 global $wgDefaultSkin;
  86
  87                 $skinNames = Skin::getSkinNames();
  88
  89                 if ( $key == '' ) {
  90                         // Don't return the default immediately;
  91                         // in a misconfiguration we need to fall back.
  92                         $key = $wgDefaultSkin;
  93                 }
  94
  95                 if ( isset( $skinNames[$key] ) ) {
  96                         return $key;
  97                 }
  98
  99                 // Older versions of the software used a numeric setting
 100                 // in the user preferences.
 101                 $fallback = array(
 102                         0 => $wgDefaultSkin,
 103                         1 => 'nostalgia',
 104                         2 => 'cologneblue'
 105                 );
 106
 107                 if ( isset( $fallback[$key] ) ) {
 108                         $key = $fallback[$key];
 109                 }
 110
 111                 if ( isset( $skinNames[$key] ) ) {
 112                         return $key;
 113                 } elseif ( isset( $skinNames[$wgDefaultSkin] ) ) {
 114                         return $wgDefaultSkin;
 115                 } else {
 116                         return 'vector';
 117                 }
 118         }
 119
 120         /**
 121          * Factory method for loading a skin of a given type
 122          * @param $key String: 'monobook', 'standard', etc.
 123          * @return Skin
 124          */
 125         static function &newFromKey( $key ) {
 126                 global $wgStyleDirectory;
 127
 128                 $key = Skin::normalizeKey( $key );
 129
 130                 $skinNames = Skin::getSkinNames();
 131                 $skinName = $skinNames[$key];
 132                 $className = "Skin{$skinName}";
 133
 134                 # Grab the skin class and initialise it.
 135                 if ( !MWInit::classExists( $className ) ) {
 136
 137                         if ( !defined( 'MW_COMPILED' ) ) {
 138                                 // Preload base classes to work around APC/PHP5 bug
 139                                 $deps = "{$wgStyleDirectory}/{$skinName}.deps.php";
 140                                 if ( file_exists( $deps ) ) {
 141                                         include_once( $deps );
 142                                 }
 143                                 require_once( "{$wgStyleDirectory}/{$skinName}.php" );
 144                         }
 145
 146                         # Check if we got if not failback to default skin
 147                         if ( !MWInit::classExists( $className ) ) {
 148                                 # DO NOT die if the class isn't found. This breaks maintenance
 149                                 # scripts and can cause a user account to be unrecoverable
 150                                 # except by SQL manipulation if a previously valid skin name
 151                                 # is no longer valid.
 152                                 wfDebug( "Skin class does not exist: $className\n" );
 153                                 $className = 'SkinVector';
 154                                 if ( !defined( 'MW_COMPILED' ) ) {
 155                                         require_once( "{$wgStyleDirectory}/Vector.php" );
 156                                 }
 157                         }
 158                 }
 159                 $skin = new $className;
 160                 return $skin;
 161         }
 162
 163         /** @return string path to the skin stylesheet */
 164         function getStylesheet() {
 165                 return 'common/wikistandard.css';
 166         }
 167
 168         /** @return string skin name */
 169         public function getSkinName() {
 170                 return $this->skinname;
 171         }
 172
 173         function initPage( OutputPage $out ) {
 174                 wfProfileIn( __METHOD__ );
 175
 176                 $this->preloadExistence();
 177                 $this->setMembers();
 178
 179                 wfProfileOut( __METHOD__ );
 180         }
 181
 182         /**
 183          * Preload the existence of three commonly-requested pages in a single query
 184          */
 185         function preloadExistence() {
 186                 $user = $this->getUser();
 187
 188                 // User/talk link
 189                 $titles = array( $user->getUserPage(), $user->getTalkPage() );
 190
 191                 // Other tab link
 192                 if ( $this->getTitle()->getNamespace() == NS_SPECIAL ) {
 193                         // nothing
 194                 } elseif ( $this->getTitle()->isTalkPage() ) {
 195                         $titles[] = $this->getTitle()->getSubjectPage();
 196                 } else {
 197                         $titles[] = $this->getTitle()->getTalkPage();
 198                 }
 199
 200                 $lb = new LinkBatch( $titles );
 201                 $lb->setCaller( __METHOD__ );
 202                 $lb->execute();
 203         }
 204
 205         /**
 206          * Set some local variables
 207          */
 208         protected function setMembers() {
 209                 $this->userpage = $this->getUser()->getUserPage()->getPrefixedText();
 210         }
 211
 212         /**
 213          * Get the current revision ID
 214          *
 215          * @return Integer
 216          */
 217         public function getRevisionId() {
 218                 return $this->getOutput()->getRevisionId();
 219         }
 220
 221         /**
 222          * Whether the revision displayed is the latest revision of the page
 223          *
 224          * @return Boolean
 225          */
 226         public function isRevisionCurrent() {
 227                 $revID = $this->getRevisionId();
 228                 return $revID == 0 || $revID == $this->getTitle()->getLatestRevID();
 229         }
 230
 231         /**
 232          * Set the "relevant" title
 233          * @see self::getRelevantTitle()
 234          * @param $t Title object to use
 235          */
 236         public function setRelevantTitle( $t ) {
 237                 $this->mRelevantTitle = $t;
 238         }
 239
 240         /**
 241          * Return the "relevant" title.
 242          * A "relevant" title is not necessarily the actual title of the page.
 243          * Special pages like Special:MovePage use set the page they are acting on
 244          * as their "relevant" title, this allows the skin system to display things
 245          * such as content tabs which belong to to that page instead of displaying
 246          * a basic special page tab which has almost no meaning.
 247          *
 248          * @return Title
 249          */
 250         public function getRelevantTitle() {
 251                 if ( isset($this->mRelevantTitle) ) {
 252                         return $this->mRelevantTitle;
 253                 }
 254                 return $this->getTitle();
 255         }
 256
 257         /**
 258          * Set the "relevant" user
 259          * @see self::getRelevantUser()
 260          * @param $u User object to use
 261          */
 262         public function setRelevantUser( $u ) {
 263                 $this->mRelevantUser = $u;
 264         }
 265
 266         /**
 267          * Return the "relevant" user.
 268          * A "relevant" user is similar to a relevant title. Special pages like
 269          * Special:Contributions mark the user which they are relevant to so that
 270          * things like the toolbox can display the information they usually are only
 271          * able to display on a user's userpage and talkpage.
 272          * @return User
 273          */
 274         public function getRelevantUser() {
 275                 if ( isset($this->mRelevantUser) ) {
 276                         return $this->mRelevantUser;
 277                 }
 278                 $title = $this->getRelevantTitle();
 279                 if( $title->getNamespace() == NS_USER || $title->getNamespace() == NS_USER_TALK ) {
 280                         $rootUser = strtok( $title->getText(), '/' );
 281                         if ( User::isIP( $rootUser ) ) {
 282                                 $this->mRelevantUser = User::newFromName( $rootUser, false );
 283                         } else {
 284                                 $user = User::newFromName( $rootUser );
 285                                 if ( $user->isLoggedIn() ) {
 286                                         $this->mRelevantUser = $user;
 287                                 }
 288                         }
 289                         return $this->mRelevantUser;
 290                 }
 291                 return null;
 292         }
 293
 294         /**
 295          * Outputs the HTML generated by other functions.
 296          * @param $out OutputPage
 297          */
 298         abstract function outputPage( OutputPage $out );
 299
 300         static function makeVariablesScript( $data ) {
 301                 if ( $data ) {
 302                         return Html::inlineScript(
 303                                 ResourceLoader::makeLoaderConditionalScript( ResourceLoader::makeConfigSetScript( $data ) )
 304                         );
 305                 } else {
 306                         return '';
 307                 }
 308         }
 309
 310         /**
 311          * To make it harder for someone to slip a user a fake
 312          * user-JavaScript or user-CSS preview, a random token
 313          * is associated with the login session. If it's not
 314          * passed back with the preview request, we won't render
 315          * the code.
 316          *
 317          * @param $action String: 'edit', 'submit' etc.
 318          * @return bool
 319          */
 320         public function userCanPreview( $action ) {
 321                 if ( $action != 'submit' ) {
 322                         return false;
 323                 }
 324                 if ( !$this->getRequest()->wasPosted() ) {
 325                         return false;
 326                 }
 327                 if ( !$this->getTitle()->userCanEditCssSubpage() ) {
 328                         return false;
 329                 }
 330                 if ( !$this->getTitle()->userCanEditJsSubpage() ) {
 331                         return false;
 332                 }
 333
 334                 return $this->getUser()->matchEditToken(
 335                         $this->getRequest()->getVal( 'wpEditToken' ) );
 336         }
 337
 338         /**
 339          * Generated JavaScript action=raw&gen=js
 340          * This used to load MediaWiki:Common.js and the skin-specific style
 341          * before the ResourceLoader.
 342          *
 343          * @deprecated since 1.18 Use the ResourceLoader instead. This may be removed at some
 344          * point.
 345          * @param $skinName String: If set, overrides the skin name
 346          * @return String
 347          */
 348         public function generateUserJs( $skinName = null ) {
 349                 return '';
 350         }
 351
 352         /**
 353          * Generate user stylesheet for action=raw&gen=css
 354          *
 355          * @deprecated since 1.18 Use the ResourceLoader instead. This may be removed at some
 356          * point.
 357          * @return String
 358          */
 359         public function generateUserStylesheet() {
 360                 return '';
 361         }
 362
 363         /**
 364          * @private
 365          * @todo document
 366          * @param $out OutputPage
 367          */
 368         function setupUserCss( OutputPage $out ) {
 369                 global $wgUseSiteCss, $wgAllowUserCss, $wgAllowUserCssPrefs;
 370
 371                 wfProfileIn( __METHOD__ );
 372
 373                 $this->setupSkinUserCss( $out );
 374                 // Add any extension CSS
 375                 foreach ( $out->getExtStyle() as $url ) {
 376                         $out->addStyle( $url );
 377                 }
 378
 379                 // Per-site custom styles
 380                 if ( $wgUseSiteCss ) {
 381                         $out->addModuleStyles( array( 'site', 'noscript' ) );
 382                         if( $this->getUser()->isLoggedIn() ){
 383                                 $out->addModuleStyles( 'user.groups' );
 384                         }
 385                 }
 386
 387                 // Per-user custom styles
 388                 if ( $wgAllowUserCss ) {
 389                         if ( $this->getTitle()->isCssSubpage() && $this->userCanPreview( $this->getRequest()->getVal( 'action' ) ) ) {
 390                                 // @todo FIXME: Properly escape the cdata!
 391                                 $out->addInlineStyle( $this->getRequest()->getText( 'wpTextbox1' ) );
 392                         } else {
 393                                 $out->addModuleStyles( 'user' );
 394                         }
 395                 }
 396
 397                 // Per-user preference styles
 398                 if ( $wgAllowUserCssPrefs ) {
 399                         $out->addModuleStyles( 'user.options' );
 400                 }
 401
 402                 wfProfileOut( __METHOD__ );
 403         }
 404
 405         /**
 406          * Get the query to generate a dynamic stylesheet
 407          *
 408          * @return array
 409          */
 410         public static function getDynamicStylesheetQuery() {
 411                 global $wgSquidMaxage;
 412
 413                 return array(
 414                                 'action' => 'raw',
 415                                 'maxage' => $wgSquidMaxage,
 416                                 'usemsgcache' => 'yes',
 417                                 'ctype' => 'text/css',
 418                                 'smaxage' => $wgSquidMaxage,
 419                         );
 420         }
 421
 422         /**
 423          * Add skin specific stylesheets
 424          * Calling this method with an $out of anything but the same OutputPage
 425          * inside ->getOutput() is deprecated. The $out arg is kept
 426          * for compatibility purposes with skins.
 427          * @param $out OutputPage
 428          * @delete
 429          */
 430         abstract function setupSkinUserCss( OutputPage $out );
 431
 432         /**
 433          * TODO: document
 434          * @param $title Title
 435          * @return String
 436          */
 437         function getPageClasses( $title ) {
 438                 global $wgRequest;
 439                 $numeric = 'ns-' . $title->getNamespace();
 440
 441                 if ( $title->getNamespace() == NS_SPECIAL ) {
 442                         $type = 'ns-special';
 443                         // bug 23315: provide a class based on the canonical special page name without subpages
 444                         list( $canonicalName ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );
 445                         if ( $canonicalName ) {
 446                                 $type .= ' ' . Sanitizer::escapeClass( "mw-special-$canonicalName" );
 447                         } else {
 448                                 $type .= ' mw-invalidspecialpage';
 449                         }
 450                 } elseif ( $title->isTalkPage() ) {
 451                         $type = 'ns-talk';
 452                 } else {
 453                         $type = 'ns-subject';
 454                 }
 455
 456                 $name = Sanitizer::escapeClass( 'page-' . $title->getPrefixedText() );
 457
 458                 if ( $wgRequest->getVal('action') ) {
 459                         $action = 'action-' . $wgRequest->getVal('action');
 460                 } else {
 461                         $action = 'action-view';
 462                 }
 463                 return "$numeric $type $name $action";
 464         }
 465
 466         /**
 467          * This will be called by OutputPage::headElement when it is creating the
 468          * <body> tag, skins can override it if they have a need to add in any
 469          * body attributes or classes of their own.
 470          * @param $out OutputPage
 471          * @param $bodyAttrs Array
 472          */
 473         function addToBodyAttributes( $out, &$bodyAttrs ) {
 474                 // does nothing by default
 475         }
 476
 477         /**
 478          * URL to the logo
 479          * @return String
 480          */
 481         function getLogo() {
 482                 global $wgLogo;
 483                 return $wgLogo;
 484         }
 485
 486         function getCategoryLinks() {
 487                 global $wgUseCategoryBrowser;
 488
 489                 $out = $this->getOutput();
 490
 491                 if ( count( $out->mCategoryLinks ) == 0 ) {
 492                         return '';
 493                 }
 494
 495                 $embed = "<li>";
 496                 $pop = "</li>";
 497
 498                 $allCats = $out->getCategoryLinks();
 499                 $s = '';
 500                 $colon = wfMsgExt( 'colon-separator', 'escapenoentities' );
 501
 502                 if ( !empty( $allCats['normal'] ) ) {
 503                         $t = $embed . implode( "{$pop}{$embed}" , $allCats['normal'] ) . $pop;
 504
 505                         $msg = wfMsgExt( 'pagecategories', array( 'parsemag', 'escapenoentities' ), count( $allCats['normal'] ) );
 506                         $s .= '<div id="mw-normal-catlinks">' .
 507                                 Linker::link( Title::newFromText( wfMsgForContent( 'pagecategorieslink' ) ), $msg )
 508                                 . $colon . '<ul>' . $t . '</ul>' . '</div>';
 509                 }
 510
 511                 # Hidden categories
 512                 if ( isset( $allCats['hidden'] ) ) {
 513                         if ( $this->getUser()->getBoolOption( 'showhiddencats' ) ) {
 514                                 $class = 'mw-hidden-cats-user-shown';
 515                         } elseif ( $this->getTitle()->getNamespace() == NS_CATEGORY ) {
 516                                 $class = 'mw-hidden-cats-ns-shown';
 517                         } else {
 518                                 $class = 'mw-hidden-cats-hidden';
 519                         }
 520
 521                         $s .= "<div id=\"mw-hidden-catlinks\" class=\"$class\">" .
 522                                 wfMsgExt( 'hidden-categories', array( 'parsemag', 'escapenoentities' ), count( $allCats['hidden'] ) ) .
 523                                 $colon . '<ul>' . $embed . implode( "{$pop}{$embed}" , $allCats['hidden'] ) . $pop . '</ul>' .
 524                                 '</div>';
 525                 }
 526
 527                 # optional 'dmoz-like' category browser. Will be shown under the list
 528                 # of categories an article belong to
 529                 if ( $wgUseCategoryBrowser ) {
 530                         $s .= '<br /><hr />';
 531
 532                         # get a big array of the parents tree
 533                         $parenttree = $this->getTitle()->getParentCategoryTree();
 534                         # Skin object passed by reference cause it can not be
 535                         # accessed under the method subfunction drawCategoryBrowser
 536                         $tempout = explode( "\n", $this->drawCategoryBrowser( $parenttree ) );
 537                         # Clean out bogus first entry and sort them
 538                         unset( $tempout[0] );
 539                         asort( $tempout );
 540                         # Output one per line
 541                         $s .= implode( "<br />\n", $tempout );
 542                 }
 543
 544                 return $s;
 545         }
 546
 547         /**
 548          * Render the array as a serie of links.
 549          * @param $tree Array: categories tree returned by Title::getParentCategoryTree
 550          * @return String separated by &gt;, terminate with "\n"
 551          */
 552         function drawCategoryBrowser( $tree ) {
 553                 $return = '';
 554
 555                 foreach ( $tree as $element => $parent ) {
 556                         if ( empty( $parent ) ) {
 557                                 # element start a new list
 558                                 $return .= "\n";
 559                         } else {
 560                                 # grab the others elements
 561                                 $return .= $this->drawCategoryBrowser( $parent ) . ' &gt; ';
 562                         }
 563
 564                         # add our current element to the list
 565                         $eltitle = Title::newFromText( $element );
 566                         $return .=  Linker::link( $eltitle, $eltitle->getText() );
 567                 }
 568
 569                 return $return;
 570         }
 571
 572         function getCategories() {
 573                 $out = $this->getOutput();
 574
 575                 $catlinks = $this->getCategoryLinks();
 576
 577                 $classes = 'catlinks';
 578
 579                 // Check what we're showing
 580                 $allCats = $out->getCategoryLinks();
 581                 $showHidden = $this->getUser()->getBoolOption( 'showhiddencats' ) ||
 582                                                 $this->getTitle()->getNamespace() == NS_CATEGORY;
 583
 584                 if ( empty( $allCats['normal'] ) && !( !empty( $allCats['hidden'] ) && $showHidden ) ) {
 585                         $classes .= ' catlinks-allhidden';
 586                 }
 587
 588                 return "<div id='catlinks' class='$classes'>{$catlinks}</div>";
 589         }
 590
 591         /**
 592          * This runs a hook to allow extensions placing their stuff after content
 593          * and article metadata (e.g. categories).
 594          * Note: This function has nothing to do with afterContent().
 595          *
 596          * This hook is placed here in order to allow using the same hook for all
 597          * skins, both the SkinTemplate based ones and the older ones, which directly
 598          * use this class to get their data.
 599          *
 600          * The output of this function gets processed in SkinTemplate::outputPage() for
 601          * the SkinTemplate based skins, all other skins should directly echo it.
 602          *
 603          * @return String, empty by default, if not changed by any hook function.
 604          */
 605         protected function afterContentHook() {
 606                 $data = '';
 607
 608                 if ( wfRunHooks( 'SkinAfterContent', array( &$data, $this ) ) ) {
 609                         // adding just some spaces shouldn't toggle the output
 610                         // of the whole <div/>, so we use trim() here
 611                         if ( trim( $data ) != '' ) {
 612                                 // Doing this here instead of in the skins to
 613                                 // ensure that the div has the same ID in all
 614                                 // skins
 615                                 $data = "<div id='mw-data-after-content'>\n" .
 616                                         "\t$data\n" .
 617                                         "</div>\n";
 618                         }
 619                 } else {
 620                         wfDebug( "Hook SkinAfterContent changed output processing.\n" );
 621                 }
 622
 623                 return $data;
 624         }
 625
 626         /**
 627          * Generate debug data HTML for displaying at the bottom of the main content
 628          * area.
 629          * @return String HTML containing debug data, if enabled (otherwise empty).
 630          */
 631         protected function generateDebugHTML() {
 632                 global $wgShowDebug;
 633
 634                 if ( $wgShowDebug ) {
 635                         $listInternals = $this->formatDebugHTML( $this->getOutput()->mDebugtext );
 636                         return "\n<hr />\n<strong>Debug data:</strong><ul id=\"mw-debug-html\">" .
 637                                 $listInternals . "</ul>\n";
 638                 }
 639
 640                 return '';
 641         }
 642
 643         private function formatDebugHTML( $debugText ) {
 644                 global $wgDebugTimestamps;
 645
 646                 $lines = explode( "\n", $debugText );
 647                 $curIdent = 0;
 648                 $ret = '<li>';
 649
 650                 foreach ( $lines as $line ) {
 651                         $pre = '';
 652                         if ( $wgDebugTimestamps ) {
 653                                 $matches = array();
 654                                 if ( preg_match( '/^(\d+\.\d+\s{2})/', $line, $matches ) ) {
 655                                         $pre = $matches[1];
 656                                         $line = substr( $line, strlen( $pre ) );
 657                                 }
 658                         }
 659                         $display = ltrim( $line );
 660                         $ident = strlen( $line ) - strlen( $display );
 661                         $diff = $ident - $curIdent;
 662
 663                         $display = $pre . $display;
 664                         if ( $display == '' ) {
 665                                 $display = "\xc2\xa0";
 666                         }
 667
 668                         if ( !$ident && $diff < 0 && substr( $display, 0, 9 ) != 'Entering ' && substr( $display, 0, 8 ) != 'Exiting ' ) {
 669                                 $ident = $curIdent;
 670                                 $diff = 0;
 671                                 $display = '<span style="background:yellow;">' . htmlspecialchars( $display ) . '</span>';
 672                         } else {
 673                                 $display = htmlspecialchars( $display );
 674                         }
 675
 676                         if ( $diff < 0 ) {
 677                                 $ret .= str_repeat( "</li></ul>\n", -$diff ) . "</li><li>\n";
 678                         } elseif ( $diff == 0 ) {
 679                                 $ret .= "</li><li>\n";
 680                         } else {
 681                                 $ret .= str_repeat( "<ul><li>\n", $diff );
 682                         }
 683                         $ret .= "<tt>$display</tt>\n";
 684
 685                         $curIdent = $ident;
 686                 }
 687
 688                 $ret .= str_repeat( '</li></ul>', $curIdent ) . '</li>';
 689
 690                 return $ret;
 691         }
 692
 693         /**
 694          * This gets called shortly before the </body> tag.
 695          * @param $out OutputPage object
 696          * @return String HTML-wrapped JS code to be put before </body>
 697          */
 698         function bottomScripts( $out ) {
 699                 // TODO and the suckage continues. This function is really just a wrapper around
 700                 // OutputPage::getBottomScripts() which takes a Skin param. This should be cleaned
 701                 // up at some point
 702                 $bottomScriptText = $out->getBottomScripts( $this );
 703                 wfRunHooks( 'SkinAfterBottomScripts', array( $this, &$bottomScriptText ) );
 704
 705                 return $bottomScriptText;
 706         }
 707
 708         /** @return string Retrievied from HTML text */
 709         function printSource() {
 710                 $url = htmlspecialchars( $this->getTitle()->getFullURL() );
 711                 return wfMsg( 'retrievedfrom', '<a href="' . $url . '">' . $url . '</a>' );
 712         }
 713
 714         function getUndeleteLink() {
 715                 $action = $this->getRequest()->getVal( 'action', 'view' );
 716
 717                 if ( $this->getUser()->isAllowed( 'deletedhistory' ) &&
 718                         ( $this->getTitle()->getArticleId() == 0 || $action == 'history' ) ) {
 719
 720                         $includeSuppressed = $this->getUser()->isAllowed( 'suppressrevision' );
 721                         $n = $this->getTitle()->isDeleted( $includeSuppressed );
 722
 723                         if ( $n ) {
 724                                 if ( $this->getUser()->isAllowed( 'undelete' ) ) {
 725                                         $msg = 'thisisdeleted';
 726                                 } else {
 727                                         $msg = 'viewdeleted';
 728                                 }
 729
 730                                 return wfMsg(
 731                                         $msg,
 732                                         Linker::link(
 733                                                 SpecialPage::getTitleFor( 'Undelete', $this->getTitle()->getPrefixedDBkey() ),
 734                                                 wfMsgExt( 'restorelink', array( 'parsemag', 'escape' ), $this->getLang()->formatNum( $n ) ),
 735                                                 array(),
 736                                                 array(),
 737                                                 array( 'known', 'noclasses' )
 738                                         )
 739                                 );
 740                         }
 741                 }
 742
 743                 return '';
 744         }
 745
 746         function subPageSubtitle() {
 747                 $out = $this->getOutput();
 748                 $subpages = '';
 749
 750                 if ( !wfRunHooks( 'SkinSubPageSubtitle', array( &$subpages, $this, $out ) ) ) {
 751                         return $subpages;
 752                 }
 753
 754                 if ( $out->isArticle() && MWNamespace::hasSubpages( $out->getTitle()->getNamespace() ) ) {
 755                         $ptext = $this->getTitle()->getPrefixedText();
 756                         if ( preg_match( '/\//', $ptext ) ) {
 757                                 $links = explode( '/', $ptext );
 758                                 array_pop( $links );
 759                                 $c = 0;
 760                                 $growinglink = '';
 761                                 $display = '';
 762
 763                                 foreach ( $links as $link ) {
 764                                         $growinglink .= $link;
 765                                         $display .= $link;
 766                                         $linkObj = Title::newFromText( $growinglink );
 767
 768                                         if ( is_object( $linkObj ) && $linkObj->exists() ) {
 769                                                 $getlink = $this->link(
 770                                                         $linkObj,
 771                                                         htmlspecialchars( $display ),
 772                                                         array(),
 773                                                         array(),
 774                                                         array( 'known', 'noclasses' )
 775                                                 );
 776
 777                                                 $c++;
 778
 779                                                 if ( $c > 1 ) {
 780                                                         $subpages .= wfMsgExt( 'pipe-separator', 'escapenoentities' );
 781                                                 } else  {
 782                                                         $subpages .= '&lt; ';
 783                                                 }
 784
 785                                                 $subpages .= $getlink;
 786                                                 $display = '';
 787                                         } else {
 788                                                 $display .= '/';
 789                                         }
 790                                         $growinglink .= '/';
 791                                 }
 792                         }
 793                 }
 794
 795                 return $subpages;
 796         }
 797
 798         /**
 799          * Returns true if the IP should be shown in the header
 800          * @return Bool
 801          */
 802         function showIPinHeader() {
 803                 global $wgShowIPinHeader;
 804                 return $wgShowIPinHeader && session_id() != '';
 805         }
 806
 807         function getSearchLink() {
 808                 $searchPage = SpecialPage::getTitleFor( 'Search' );
 809                 return $searchPage->getLocalURL();
 810         }
 811
 812         function escapeSearchLink() {
 813                 return htmlspecialchars( $this->getSearchLink() );
 814         }
 815
 816         function getCopyright( $type = 'detect' ) {
 817                 global $wgRightsPage, $wgRightsUrl, $wgRightsText;
 818
 819                 if ( $type == 'detect' ) {
 820                         $diff = $this->getRequest()->getVal( 'diff' );
 821
 822                         if ( is_null( $diff ) && !$this->isRevisionCurrent() && wfMsgForContent( 'history_copyright' ) !== '-' ) {
 823                                 $type = 'history';
 824                         } else {
 825                                 $type = 'normal';
 826                         }
 827                 }
 828
 829                 if ( $type == 'history' ) {
 830                         $msg = 'history_copyright';
 831                 } else {
 832                         $msg = 'copyright';
 833                 }
 834
 835                 $out = '';
 836
 837                 if ( $wgRightsPage ) {
 838                         $title = Title::newFromText( $wgRightsPage );
 839                         $link = Linker::linkKnown( $title, $wgRightsText );
 840                 } elseif ( $wgRightsUrl ) {
 841                         $link = Linker::makeExternalLink( $wgRightsUrl, $wgRightsText );
 842                 } elseif ( $wgRightsText ) {
 843                         $link = $wgRightsText;
 844                 } else {
 845                         # Give up now
 846                         return $out;
 847                 }
 848
 849                 // Allow for site and per-namespace customization of copyright notice.
 850                 $forContent = true;
 851
 852                 wfRunHooks( 'SkinCopyrightFooter', array( $this->getTitle(), $type, &$msg, &$link, &$forContent ) );
 853
 854                 if ( $forContent ) {
 855                         $out .= wfMsgForContent( $msg, $link );
 856                 } else {
 857                         $out .= wfMsg( $msg, $link );
 858                 }
 859
 860                 return $out;
 861         }
 862
 863         function getCopyrightIcon() {
 864                 global $wgRightsUrl, $wgRightsText, $wgRightsIcon, $wgCopyrightIcon;
 865
 866                 $out = '';
 867
 868                 if ( isset( $wgCopyrightIcon ) && $wgCopyrightIcon ) {
 869                         $out = $wgCopyrightIcon;
 870                 } elseif ( $wgRightsIcon ) {
 871                         $icon = htmlspecialchars( $wgRightsIcon );
 872
 873                         if ( $wgRightsUrl ) {
 874                                 $url = htmlspecialchars( $wgRightsUrl );
 875                                 $out .= '<a href="' . $url . '">';
 876                         }
 877
 878                         $text = htmlspecialchars( $wgRightsText );
 879                         $out .= "<img src=\"$icon\" alt=\"$text\" width=\"88\" height=\"31\" />";
 880
 881                         if ( $wgRightsUrl ) {
 882                                 $out .= '</a>';
 883                         }
 884                 }
 885
 886                 return $out;
 887         }
 888
 889         /**
 890          * Gets the powered by MediaWiki icon.
 891          * @return string
 892          */
 893         function getPoweredBy() {
 894                 global $wgStylePath;
 895
 896                 $url = htmlspecialchars( "$wgStylePath/common/images/poweredby_mediawiki_88x31.png" );
 897                 $text = '<a href="http://www.mediawiki.org/"><img src="' . $url . '" height="31" width="88" alt="Powered by MediaWiki" /></a>';
 898                 wfRunHooks( 'SkinGetPoweredBy', array( &$text, $this ) );
 899                 return $text;
 900         }
 901
 902         /**
 903          * Get the timestamp of the latest revision, formatted in user language
 904          *
 905          * @param $article Article object. Used if we're working with the current revision
 906          * @return String
 907          */
 908         protected function lastModified( $article ) {
 909                 if ( !$this->isRevisionCurrent() ) {
 910                         $timestamp = Revision::getTimestampFromId( $this->getTitle(), $this->getRevisionId() );
 911                 } else {
 912                         $timestamp = $article->getTimestamp();
 913                 }
 914
 915                 if ( $timestamp ) {
 916                         $d = $this->getLang()->date( $timestamp, true );
 917                         $t = $this->getLang()->time( $timestamp, true );
 918                         $s = ' ' . wfMsg( 'lastmodifiedat', $d, $t );
 919                 } else {
 920                         $s = '';
 921                 }
 922
 923                 if ( wfGetLB()->getLaggedSlaveMode() ) {
 924                         $s .= ' <strong>' . wfMsg( 'laggedslavemode' ) . '</strong>';
 925                 }
 926
 927                 return $s;
 928         }
 929
 930         function logoText( $align = '' ) {
 931                 if ( $align != '' ) {
 932                         $a = " align='{$align}'";
 933                 } else {
 934                         $a = '';
 935                 }
 936
 937                 $mp = wfMsg( 'mainpage' );
 938                 $mptitle = Title::newMainPage();
 939                 $url = ( is_object( $mptitle ) ? $mptitle->escapeLocalURL() : '' );
 940
 941                 $logourl = $this->getLogo();
 942                 $s = "<a href='{$url}'><img{$a} src='{$logourl}' alt='[{$mp}]' /></a>";
 943
 944                 return $s;
 945         }
 946
 947         /**
 948          * Renders a $wgFooterIcons icon acording to the method's arguments
 949          * @param $icon Array: The icon to build the html for, see $wgFooterIcons for the format of this array
 950          * @param $withImage Bool|String: Whether to use the icon's image or output a text-only footericon
 951          * @return String HTML
 952          */
 953         function makeFooterIcon( $icon, $withImage = 'withImage' ) {
 954                 if ( is_string( $icon ) ) {
 955                         $html = $icon;
 956                 } else { // Assuming array
 957                         $url = isset($icon["url"]) ? $icon["url"] : null;
 958                         unset( $icon["url"] );
 959                         if ( isset( $icon["src"] ) && $withImage === 'withImage' ) {
 960                                 $html = Html::element( 'img', $icon ); // do this the lazy way, just pass icon data as an attribute array
 961                         } else {
 962                                 $html = htmlspecialchars( $icon["alt"] );
 963                         }
 964                         if ( $url ) {
 965                                 $html = Html::rawElement( 'a', array( "href" => $url ), $html );
 966                         }
 967                 }
 968                 return $html;
 969         }
 970
 971         /**
 972          * Gets the link to the wiki's main page.
 973          * @return string
 974          */
 975         function mainPageLink() {
 976                 $s = Linker::link(
 977                         Title::newMainPage(),
 978                         wfMsg( 'mainpage' ),
 979                         array(),
 980                         array(),
 981                         array( 'known', 'noclasses' )
 982                 );
 983
 984                 return $s;
 985         }
 986
 987         public function footerLink( $desc, $page ) {
 988                 // if the link description has been set to "-" in the default language,
 989                 if ( wfMsgForContent( $desc )  == '-' ) {
 990                         // then it is disabled, for all languages.
 991                         return '';
 992                 } else {
 993                         // Otherwise, we display the link for the user, described in their
 994                         // language (which may or may not be the same as the default language),
 995                         // but we make the link target be the one site-wide page.
 996                         $title = Title::newFromText( wfMsgForContent( $page ) );
 997
 998                         return Linker::linkKnown(
 999                                 $title,
1000                                 wfMsgExt( $desc, array( 'parsemag', 'escapenoentities' ) )
1001                         );
1002                 }
1003         }
1004
1005         /**
1006          * Gets the link to the wiki's privacy policy page.
1007          * @return String HTML
1008          */
1009         function privacyLink() {
1010                 return $this->footerLink( 'privacy', 'privacypage' );
1011         }
1012
1013         /**
1014          * Gets the link to the wiki's about page.
1015          * @return String HTML
1016          */
1017         function aboutLink() {
1018                 return $this->footerLink( 'aboutsite', 'aboutpage' );
1019         }
1020
1021         /**
1022          * Gets the link to the wiki's general disclaimers page.
1023          * @return String HTML
1024          */
1025         function disclaimerLink() {
1026                 return $this->footerLink( 'disclaimers', 'disclaimerpage' );
1027         }
1028
1029         /**
1030          * Return URL options for the 'edit page' link.
1031          * This may include an 'oldid' specifier, if the current page view is such.
1032          *
1033          * @return array
1034          * @private
1035          */
1036         function editUrlOptions() {
1037                 $options = array( 'action' => 'edit' );
1038
1039                 if ( !$this->isRevisionCurrent() ) {
1040                         $options['oldid'] = intval( $this->getRevisionId() );
1041                 }
1042
1043                 return $options;
1044         }
1045
1046         function showEmailUser( $id ) {
1047                 $targetUser = User::newFromId( $id );
1048                 return $this->getUser()->canSendEmail() && # the sending user must have a confirmed email address
1049                         $targetUser->canReceiveEmail(); # the target user must have a confirmed email address and allow emails from users
1050         }
1051
1052         /**
1053          * Return a fully resolved style path url to images or styles stored in the common folder.
1054          * This method returns a url resolved using the configured skin style path
1055          * and includes the style version inside of the url.
1056          * @param $name String: The name or path of a skin resource file
1057          * @return String The fully resolved style path url including styleversion
1058          */
1059         function getCommonStylePath( $name ) {
1060                 global $wgStylePath, $wgStyleVersion;
1061                 return "$wgStylePath/common/$name?$wgStyleVersion";
1062         }
1063
1064         /**
1065          * Return a fully resolved style path url to images or styles stored in the curent skins's folder.
1066          * This method returns a url resolved using the configured skin style path
1067          * and includes the style version inside of the url.
1068          * @param $name String: The name or path of a skin resource file
1069          * @return String The fully resolved style path url including styleversion
1070          */
1071         function getSkinStylePath( $name ) {
1072                 global $wgStylePath, $wgStyleVersion;
1073                 return "$wgStylePath/{$this->stylename}/$name?$wgStyleVersion";
1074         }
1075
1076         /* these are used extensively in SkinTemplate, but also some other places */
1077         static function makeMainPageUrl( $urlaction = '' ) {
1078                 $title = Title::newMainPage();
1079                 self::checkTitle( $title, '' );
1080
1081                 return $title->getLocalURL( $urlaction );
1082         }
1083
1084         static function makeSpecialUrl( $name, $urlaction = '' ) {
1085                 $title = SpecialPage::getSafeTitleFor( $name );
1086                 return $title->getLocalURL( $urlaction );
1087         }
1088
1089         static function makeSpecialUrlSubpage( $name, $subpage, $urlaction = '' ) {
1090                 $title = SpecialPage::getSafeTitleFor( $name, $subpage );
1091                 return $title->getLocalURL( $urlaction );
1092         }
1093
1094         static function makeI18nUrl( $name, $urlaction = '' ) {
1095                 $title = Title::newFromText( wfMsgForContent( $name ) );
1096                 self::checkTitle( $title, $name );
1097                 return $title->getLocalURL( $urlaction );
1098         }
1099
1100         static function makeUrl( $name, $urlaction = '' ) {
1101                 $title = Title::newFromText( $name );
1102                 self::checkTitle( $title, $name );
1103
1104                 return $title->getLocalURL( $urlaction );
1105         }
1106
1107         /**
1108          * If url string starts with http, consider as external URL, else
1109          * internal
1110          * @param $name String
1111          * @return String URL
1112          */
1113         static function makeInternalOrExternalUrl( $name ) {
1114                 if ( preg_match( '/^(?:' . wfUrlProtocols() . ')/', $name ) ) {
1115                         return $name;
1116                 } else {
1117                         return self::makeUrl( $name );
1118                 }
1119         }
1120
1121         # this can be passed the NS number as defined in Language.php
1122         static function makeNSUrl( $name, $urlaction = '', $namespace = NS_MAIN ) {
1123                 $title = Title::makeTitleSafe( $namespace, $name );
1124                 self::checkTitle( $title, $name );
1125
1126                 return $title->getLocalURL( $urlaction );
1127         }
1128
1129         /* these return an array with the 'href' and boolean 'exists' */
1130         static function makeUrlDetails( $name, $urlaction = '' ) {
1131                 $title = Title::newFromText( $name );
1132                 self::checkTitle( $title, $name );
1133
1134                 return array(
1135                         'href' => $title->getLocalURL( $urlaction ),
1136                         'exists' => $title->getArticleID() != 0,
1137                 );
1138         }
1139
1140         /**
1141          * Make URL details where the article exists (or at least it's convenient to think so)
1142          * @param $name String Article name
1143          * @param $urlaction String
1144          * @return Array
1145          */
1146         static function makeKnownUrlDetails( $name, $urlaction = '' ) {
1147                 $title = Title::newFromText( $name );
1148                 self::checkTitle( $title, $name );
1149
1150                 return array(
1151                         'href' => $title->getLocalURL( $urlaction ),
1152                         'exists' => true
1153                 );
1154         }
1155
1156         # make sure we have some title to operate on
1157         static function checkTitle( &$title, $name ) {
1158                 if ( !is_object( $title ) ) {
1159                         $title = Title::newFromText( $name );
1160                         if ( !is_object( $title ) ) {
1161                                 $title = Title::newFromText( '--error: link target missing--' );
1162                         }
1163                 }
1164         }
1165
1166         /**
1167          * Build an array that represents the sidebar(s), the navigation bar among them
1168          *
1169          * @return array
1170          */
1171         function buildSidebar() {
1172                 global $parserMemc, $wgEnableSidebarCache, $wgSidebarCacheExpiry;
1173                 wfProfileIn( __METHOD__ );
1174
1175                 $key = wfMemcKey( 'sidebar', $this->getLang()->getCode() );
1176
1177                 if ( $wgEnableSidebarCache ) {
1178                         $cachedsidebar = $parserMemc->get( $key );
1179                         if ( $cachedsidebar ) {
1180                                 wfProfileOut( __METHOD__ );
1181                                 return $cachedsidebar;
1182                         }
1183                 }
1184
1185                 $bar = array();
1186                 $this->addToSidebar( $bar, 'sidebar' );
1187
1188                 wfRunHooks( 'SkinBuildSidebar', array( $this, &$bar ) );
1189                 if ( $wgEnableSidebarCache ) {
1190                         $parserMemc->set( $key, $bar, $wgSidebarCacheExpiry );
1191                 }
1192
1193                 wfProfileOut( __METHOD__ );
1194                 return $bar;
1195         }
1196         /**
1197          * Add content from a sidebar system message
1198          * Currently only used for MediaWiki:Sidebar (but may be used by Extensions)
1199          *
1200          * This is just a wrapper around addToSidebarPlain() for backwards compatibility
1201          *
1202          * @param &$bar array
1203          * @param $message String
1204          */
1205         function addToSidebar( &$bar, $message ) {
1206                 $this->addToSidebarPlain( $bar, wfMsgForContentNoTrans( $message ) );
1207         }
1208
1209         /**
1210          * Add content from plain text
1211          * @since 1.17
1212          * @param &$bar array
1213          * @param $text string
1214          * @return Array
1215          */
1216         function addToSidebarPlain( &$bar, $text ) {
1217                 $lines = explode( "\n", $text );
1218                 $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.
1219
1220                 $heading = '';
1221
1222                 foreach ( $lines as $line ) {
1223                         if ( strpos( $line, '*' ) !== 0 ) {
1224                                 continue;
1225                         }
1226
1227                         if ( strpos( $line, '**' ) !== 0 ) {
1228                                 $heading = trim( $line, '* ' );
1229                                 if ( !array_key_exists( $heading, $bar ) ) {
1230                                         $bar[$heading] = array();
1231                                 }
1232                         } else {
1233                                 $line = trim( $line, '* ' );
1234
1235                                 if ( strpos( $line, '|' ) !== false ) { // sanity check
1236                                         $line = MessageCache::singleton()->transform( $line, false, null, $this->getTitle() );
1237                                         $line = array_map( 'trim', explode( '|', $line, 2 ) );
1238                                         $extraAttribs = array();
1239
1240                                         $msgLink = wfMessage( $line[0] )->inContentLanguage();
1241                                         if ( $msgLink->exists() ) {
1242                                                 $link = $msgLink->text();
1243                                                 if ( $link == '-' ) {
1244                                                         continue;
1245                                                 }
1246                                         } else {
1247                                                 $link = $line[0];
1248                                         }
1249
1250                                         $msgText = wfMessage( $line[1] );
1251                                         if ( $msgText->exists() ) {
1252                                                 $text = $msgText->text();
1253                                         } else {
1254                                                 $text = $line[1];
1255                                         }
1256
1257                                         if ( preg_match( '/^(?:' . wfUrlProtocols() . ')/', $link ) ) {
1258                                                 $href = $link;
1259                                                 //Parser::getExternalLinkAttribs won't work here because of the Namespace things
1260                                                 global $wgNoFollowLinks;
1261                                                 if ( $wgNoFollowLinks ) {
1262                                                         $extraAttribs['rel'] = 'nofollow';
1263
1264                                                         global $wgNoFollowDomainExceptions;
1265                                                         if ( $wgNoFollowDomainExceptions ) {
1266                                                                 $bits = wfParseUrl( $url );
1267                                                                 if ( is_array( $bits ) && isset( $bits['host'] ) ) {
1268                                                                         foreach ( $wgNoFollowDomainExceptions as $domain ) {
1269                                                                                 if ( substr( $bits['host'], -strlen( $domain ) ) == $domain ) {
1270                                                                                         unset( $extraAttribs['rel'] );
1271                                                                                         break;
1272                                                                                 }
1273                                                                         }
1274                                                                 }
1275                                                         }
1276                                                 }
1277                                                 global $wgExternalLinkTarget;
1278                                                 if ( $wgExternalLinkTarget) {
1279                                                         $extraAttribs['target'] = $wgExternalLinkTarget;
1280                                                 }
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_merge( array(
1293                                                 'text' => $text,
1294                                                 'href' => $href,
1295                                                 'id' => 'n-' . Sanitizer::escapeId( strtr( $line[1], ' ', '-' ), 'noninitial' ),
1296                                                 'active' => false
1297                                         ), $extraAttribs );
1298                                 } elseif ( ( 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->getOutput();
1338
1339                 $newtalks = $this->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, $wgContLang;
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->getOutput()->parse( $notice );
1435                         $parserMemc->set( $key, array( 'html' => $parsed, 'hash' => md5( $notice ) ), 600 );
1436                         $notice = $parsed;
1437                 }
1438
1439                 $notice = Html::rawElement( 'div', array( 'id' => 'localNotice',
1440                         'lang' => $wgContLang->getCode(), 'dir' => $wgContLang->getDir() ), $notice );
1441                 wfProfileOut( __METHOD__ );
1442                 return $notice;
1443         }
1444
1445         /**
1446          * Get a notice based on page's namespace
1447          *
1448          * @return String: HTML fragment
1449          */
1450         function getNamespaceNotice() {
1451                 wfProfileIn( __METHOD__ );
1452
1453                 $key = 'namespacenotice-' . $this->getTitle()->getNsText();
1454                 $namespaceNotice = $this->getCachedNotice( $key );
1455                 if ( $namespaceNotice && substr( $namespaceNotice, 0, 7 ) != '<p>&lt;' ) {
1456                         $namespaceNotice = '<div id="namespacebanner">' . $namespaceNotice . '</div>';
1457                 } else {
1458                         $namespaceNotice = '';
1459                 }
1460
1461                 wfProfileOut( __METHOD__ );
1462                 return $namespaceNotice;
1463         }
1464
1465         /**
1466          * Get the site notice
1467          *
1468          * @return String: HTML fragment
1469          */
1470         function getSiteNotice() {
1471                 wfProfileIn( __METHOD__ );
1472                 $siteNotice = '';
1473
1474                 if ( wfRunHooks( 'SiteNoticeBefore', array( &$siteNotice, $this ) ) ) {
1475                         if ( is_object( $this->getUser() ) && $this->getUser()->isLoggedIn() ) {
1476                                 $siteNotice = $this->getCachedNotice( 'sitenotice' );
1477                         } else {
1478                                 $anonNotice = $this->getCachedNotice( 'anonnotice' );
1479                                 if ( !$anonNotice ) {
1480                                         $siteNotice = $this->getCachedNotice( 'sitenotice' );
1481                                 } else {
1482                                         $siteNotice = $anonNotice;
1483                                 }
1484                         }
1485                         if ( !$siteNotice ) {
1486                                 $siteNotice = $this->getCachedNotice( 'default' );
1487                         }
1488                 }
1489
1490                 wfRunHooks( 'SiteNoticeAfter', array( &$siteNotice, $this ) );
1491                 wfProfileOut( __METHOD__ );
1492                 return $siteNotice;
1493         }
1494
1495         /**
1496          * Create a section edit link.  This supersedes editSectionLink() and
1497          * editSectionLinkForOther().
1498          *
1499          * @param $nt      Title  The title being linked to (may not be the same as
1500          *   $wgTitle, if the section is included from a template)
1501          * @param $section string The designation of the section being pointed to,
1502          *   to be included in the link, like "&section=$section"
1503          * @param $tooltip string The tooltip to use for the link: will be escaped
1504          *   and wrapped in the 'editsectionhint' message
1505          * @param $lang    string Language code
1506          * @return         string HTML to use for edit link
1507          */
1508         public function doEditSectionLink( Title $nt, $section, $tooltip = null, $lang = false ) {
1509                 // HTML generated here should probably have userlangattributes
1510                 // added to it for LTR text on RTL pages
1511                 $attribs = array();
1512                 if ( !is_null( $tooltip ) ) {
1513                         # Bug 25462: undo double-escaping.
1514                         $tooltip = Sanitizer::decodeCharReferences( $tooltip );
1515                         $attribs['title'] = wfMsgExt( 'editsectionhint', array( 'language' => $lang, 'parsemag' ), $tooltip );
1516                 }
1517                 $link = Linker::link( $nt, wfMsgExt( 'editsection', array( 'language' => $lang ) ),
1518                         $attribs,
1519                         array( 'action' => 'edit', 'section' => $section ),
1520                         array( 'noclasses', 'known' )
1521                 );
1522
1523                 # Run the old hook.  This takes up half of the function . . . hopefully
1524                 # we can rid of it someday.
1525                 $attribs = '';
1526                 if ( $tooltip ) {
1527                         $attribs = wfMsgExt( 'editsectionhint', array( 'language' => $lang, 'parsemag', 'escape' ), $tooltip );
1528                         $attribs = " title=\"$attribs\"";
1529                 }
1530                 $result = null;
1531                 wfRunHooks( 'EditSectionLink', array( &$this, $nt, $section, $attribs, $link, &$result, $lang ) );
1532                 if ( !is_null( $result ) ) {
1533                         # For reverse compatibility, add the brackets *after* the hook is
1534                         # run, and even add them to hook-provided text.  (This is the main
1535                         # reason that the EditSectionLink hook is deprecated in favor of
1536                         # DoEditSectionLink: it can't change the brackets or the span.)
1537                         $result = wfMsgExt( 'editsection-brackets', array( 'escape', 'replaceafter', 'language' => $lang ), $result );
1538                         return "<span class=\"editsection\">$result</span>";
1539                 }
1540
1541                 # Add the brackets and the span, and *then* run the nice new hook, with
1542                 # clean and non-redundant arguments.
1543                 $result = wfMsgExt( 'editsection-brackets', array( 'escape', 'replaceafter', 'language' => $lang ), $link );
1544                 $result = "<span class=\"editsection\">$result</span>";
1545
1546                 wfRunHooks( 'DoEditSectionLink', array( $this, $nt, $section, $tooltip, &$result, $lang ) );
1547                 return $result;
1548         }
1549
1550         /**
1551          * Use PHP's magic __call handler to intercept legacy calls to the linker
1552          * for backwards compatibility.
1553          *
1554          * @param $fname String Name of called method
1555          * @param $args Array Arguments to the method
1556          */
1557         function __call( $fname, $args ) {
1558                 $realFunction = array( 'Linker', $fname );
1559                 if ( is_callable( $realFunction ) ) {
1560                         return call_user_func_array( $realFunction, $args );
1561                 } else {
1562                         $className = get_class( $this );
1563                         throw new MWException( "Call to undefined method $className::$fname" );
1564                 }
1565         }
1566
1567 }