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