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 Linker {
  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         // @todo Fixme: should be protected :-\
  27         var $mTitle = null;
  28         protected $mRelevantTitle = null;
  29         protected $mRelevantUser = null;
  30
  31         /** Constructor, call parent constructor */
  32         function __construct() {
  33                 parent::__construct();
  34         }
  35
  36         /**
  37          * Fetch the set of available skins.
  38          * @return array of strings
  39          */
  40         static function getSkinNames() {
  41                 global $wgValidSkinNames;
  42                 static $skinsInitialised = false;
  43
  44                 if ( !$skinsInitialised || !count( $wgValidSkinNames ) ) {
  45                         # Get a list of available skins
  46                         # Build using the regular expression '^(.*).php$'
  47                         # Array keys are all lower case, array value keep the case used by filename
  48                         #
  49                         wfProfileIn( __METHOD__ . '-init' );
  50
  51                         global $wgStyleDirectory;
  52
  53                         $skinDir = dir( $wgStyleDirectory );
  54
  55                         # while code from www.php.net
  56                         while ( false !== ( $file = $skinDir->read() ) ) {
  57                                 // Skip non-PHP files, hidden files, and '.dep' includes
  58                                 $matches = array();
  59
  60                                 if ( preg_match( '/^([^.]*)\.php$/', $file, $matches ) ) {
  61                                         $aSkin = $matches[1];
  62                                         $wgValidSkinNames[strtolower( $aSkin )] = $aSkin;
  63                                 }
  64                         }
  65                         $skinDir->close();
  66                         $skinsInitialised = true;
  67                         wfProfileOut( __METHOD__ . '-init' );
  68                 }
  69                 return $wgValidSkinNames;
  70         }
  71
  72         /**
  73          * Fetch the list of usable skins in regards to $wgSkipSkins.
  74          * Useful for Special:Preferences and other places where you
  75          * only want to show skins users _can_ use.
  76          * @return array of strings
  77          */
  78         public static function getUsableSkins() {
  79                 global $wgSkipSkins;
  80
  81                 $usableSkins = self::getSkinNames();
  82
  83                 foreach ( $wgSkipSkins as $skip ) {
  84                         unset( $usableSkins[$skip] );
  85                 }
  86
  87                 return $usableSkins;
  88         }
  89
  90         /**
  91          * Normalize a skin preference value to a form that can be loaded.
  92          * If a skin can't be found, it will fall back to the configured
  93          * default (or the old 'Classic' skin if that's broken).
  94          * @param $key String: 'monobook', 'standard', etc.
  95          * @return string
  96          */
  97         static function normalizeKey( $key ) {
  98                 global $wgDefaultSkin;
  99
 100                 $skinNames = Skin::getSkinNames();
 101
 102                 if ( $key == '' ) {
 103                         // Don't return the default immediately;
 104                         // in a misconfiguration we need to fall back.
 105                         $key = $wgDefaultSkin;
 106                 }
 107
 108                 if ( isset( $skinNames[$key] ) ) {
 109                         return $key;
 110                 }
 111
 112                 // Older versions of the software used a numeric setting
 113                 // in the user preferences.
 114                 $fallback = array(
 115                         0 => $wgDefaultSkin,
 116                         1 => 'nostalgia',
 117                         2 => 'cologneblue'
 118                 );
 119
 120                 if ( isset( $fallback[$key] ) ) {
 121                         $key = $fallback[$key];
 122                 }
 123
 124                 if ( isset( $skinNames[$key] ) ) {
 125                         return $key;
 126                 } else if ( isset( $skinNames[$wgDefaultSkin] ) ) {
 127                         return $wgDefaultSkin;
 128                 } else {
 129                         return 'vector';
 130                 }
 131         }
 132
 133         /**
 134          * Factory method for loading a skin of a given type
 135          * @param $key String: 'monobook', 'standard', etc.
 136          * @return Skin
 137          */
 138         static function &newFromKey( $key ) {
 139                 global $wgStyleDirectory;
 140
 141                 $key = Skin::normalizeKey( $key );
 142
 143                 $skinNames = Skin::getSkinNames();
 144                 $skinName = $skinNames[$key];
 145                 $className = "Skin{$skinName}";
 146
 147                 # Grab the skin class and initialise it.
 148                 if ( !class_exists( $className ) ) {
 149                         // Preload base classes to work around APC/PHP5 bug
 150                         $deps = "{$wgStyleDirectory}/{$skinName}.deps.php";
 151
 152                         if ( file_exists( $deps ) ) {
 153                                 include_once( $deps );
 154                         }
 155                         require_once( "{$wgStyleDirectory}/{$skinName}.php" );
 156
 157                         # Check if we got if not failback to default skin
 158                         if ( !class_exists( $className ) ) {
 159                                 # DO NOT die if the class isn't found. This breaks maintenance
 160                                 # scripts and can cause a user account to be unrecoverable
 161                                 # except by SQL manipulation if a previously valid skin name
 162                                 # is no longer valid.
 163                                 wfDebug( "Skin class does not exist: $className\n" );
 164                                 $className = 'SkinVector';
 165                                 require_once( "{$wgStyleDirectory}/Vector.php" );
 166                         }
 167                 }
 168                 $skin = new $className;
 169                 return $skin;
 170         }
 171
 172         /** @return string path to the skin stylesheet */
 173         function getStylesheet() {
 174                 return 'common/wikistandard.css';
 175         }
 176
 177         /** @return string skin name */
 178         public function getSkinName() {
 179                 return $this->skinname;
 180         }
 181
 182         function initPage( OutputPage $out ) {
 183                 global $wgFavicon, $wgAppleTouchIcon, $wgEnableAPI;
 184
 185                 wfProfileIn( __METHOD__ );
 186
 187                 # Generally the order of the favicon and apple-touch-icon links
 188                 # should not matter, but Konqueror (3.5.9 at least) incorrectly
 189                 # uses whichever one appears later in the HTML source. Make sure
 190                 # apple-touch-icon is specified first to avoid this.
 191                 if ( false !== $wgAppleTouchIcon ) {
 192                         $out->addLink( array( 'rel' => 'apple-touch-icon', 'href' => $wgAppleTouchIcon ) );
 193                 }
 194
 195                 if ( false !== $wgFavicon ) {
 196                         $out->addLink( array( 'rel' => 'shortcut icon', 'href' => $wgFavicon ) );
 197                 }
 198
 199                 # OpenSearch description link
 200                 $out->addLink( array(
 201                         'rel' => 'search',
 202                         'type' => 'application/opensearchdescription+xml',
 203                         'href' => wfScript( 'opensearch_desc' ),
 204                         'title' => wfMsgForContent( 'opensearch-desc' ),
 205                 ) );
 206
 207                 if ( $wgEnableAPI ) {
 208                         # Real Simple Discovery link, provides auto-discovery information
 209                         # for the MediaWiki API (and potentially additional custom API
 210                         # support such as WordPress or Twitter-compatible APIs for a
 211                         # blogging extension, etc)
 212                         $out->addLink( array(
 213                                 'rel' => 'EditURI',
 214                                 'type' => 'application/rsd+xml',
 215                                 'href' => wfExpandUrl( wfAppendQuery( wfScript( 'api' ), array( 'action' => 'rsd' ) ) ),
 216                         ) );
 217                 }
 218
 219                 $this->addMetadataLinks( $out );
 220
 221                 $this->mRevisionId = $out->mRevisionId;
 222
 223                 $this->preloadExistence();
 224
 225                 wfProfileOut( __METHOD__ );
 226         }
 227
 228         /**
 229          * Preload the existence of three commonly-requested pages in a single query
 230          */
 231         function preloadExistence() {
 232                 global $wgUser;
 233
 234                 // User/talk link
 235                 $titles = array( $wgUser->getUserPage(), $wgUser->getTalkPage() );
 236
 237                 // Other tab link
 238                 if ( $this->mTitle->getNamespace() == NS_SPECIAL ) {
 239                         // nothing
 240                 } elseif ( $this->mTitle->isTalkPage() ) {
 241                         $titles[] = $this->mTitle->getSubjectPage();
 242                 } else {
 243                         $titles[] = $this->mTitle->getTalkPage();
 244                 }
 245
 246                 $lb = new LinkBatch( $titles );
 247                 $lb->setCaller( __METHOD__ );
 248                 $lb->execute();
 249         }
 250
 251         /**
 252          * Adds metadata links below to the HTML output.
 253          * <ol>
 254          *  <li>Creative Commons
 255          *   <br />See http://wiki.creativecommons.org/Extend_Metadata.
 256          *  </li>
 257          *  <li>Dublin Core</li>
 258          *  <li>Use hreflang to specify canonical and alternate links
 259          *   <br />See http://www.google.com/support/webmasters/bin/answer.py?answer=189077
 260          *  </li>
 261          *  <li>Copyright</li>
 262          * <ol>
 263          *
 264          * @param $out Object: instance of OutputPage
 265          */
 266         function addMetadataLinks( OutputPage $out ) {
 267                 global $wgEnableDublinCoreRdf, $wgEnableCreativeCommonsRdf;
 268                 global $wgDisableLangConversion, $wgCanonicalLanguageLinks, $wgContLang;
 269                 global $wgRightsPage, $wgRightsUrl;
 270
 271                 if ( $out->isArticleRelated() ) {
 272                         # note: buggy CC software only reads first "meta" link
 273                         if ( $wgEnableCreativeCommonsRdf ) {
 274                                 $out->addMetadataLink( array(
 275                                         'title' => 'Creative Commons',
 276                                         'type' => 'application/rdf+xml',
 277                                         'href' => $this->mTitle->getLocalURL( 'action=creativecommons' ) )
 278                                 );
 279                         }
 280
 281                         if ( $wgEnableDublinCoreRdf ) {
 282                                 $out->addMetadataLink( array(
 283                                         'title' => 'Dublin Core',
 284                                         'type' => 'application/rdf+xml',
 285                                         'href' => $this->mTitle->getLocalURL( 'action=dublincore' ) )
 286                                 );
 287                         }
 288                 }
 289
 290                 if ( !$wgDisableLangConversion && $wgCanonicalLanguageLinks
 291                         && $wgContLang->hasVariants() ) {
 292
 293                         $urlvar = $wgContLang->getURLVariant();
 294
 295                         if ( !$urlvar ) {
 296                                 $variants = $wgContLang->getVariants();
 297                                 foreach ( $variants as $_v ) {
 298                                         $out->addLink( array(
 299                                                 'rel' => 'alternate',
 300                                                 'hreflang' => $_v,
 301                                                 'href' => $this->mTitle->getLocalURL( '', $_v ) )
 302                                         );
 303                                 }
 304                         } else {
 305                                 $out->addLink( array(
 306                                         'rel' => 'canonical',
 307                                         'href' => $this->mTitle->getFullURL() )
 308                                 );
 309                         }
 310                 }
 311
 312                 $copyright = '';
 313                 if ( $wgRightsPage ) {
 314                         $copy = Title::newFromText( $wgRightsPage );
 315
 316                         if ( $copy ) {
 317                                 $copyright = $copy->getLocalURL();
 318                         }
 319                 }
 320
 321                 if ( !$copyright && $wgRightsUrl ) {
 322                         $copyright = $wgRightsUrl;
 323                 }
 324
 325                 if ( $copyright ) {
 326                         $out->addLink( array(
 327                                 'rel' => 'copyright',
 328                                 'href' => $copyright )
 329                         );
 330                 }
 331         }
 332
 333         /**
 334          * Set some local variables
 335          */
 336         protected function setMembers() {
 337                 global $wgUser;
 338                 $this->mUser = $wgUser;
 339                 $this->userpage = $wgUser->getUserPage()->getPrefixedText();
 340                 $this->usercss = false;
 341         }
 342
 343         /**
 344          * Whether the revision displayed is the latest revision of the page
 345          *
 346          * @return Boolean
 347          */
 348         public function isRevisionCurrent() {
 349                 return $this->mRevisionId == 0 || $this->mRevisionId == $this->mTitle->getLatestRevID();
 350         }
 351
 352         /**
 353          * Set the title
 354          * @param $t Title object to use
 355          */
 356         public function setTitle( $t ) {
 357                 $this->mTitle = $t;
 358         }
 359
 360         /** Get the title */
 361         public function getTitle() {
 362                 return $this->mTitle;
 363         }
 364
 365         /**
 366          * Set the "relevant" title
 367          * @see self::getRelevantTitle()
 368          * @param $t Title object to use
 369          */
 370         public function setRelevantTitle( $t ) {
 371                 $this->mRelevantTitle = $t;
 372         }
 373
 374         /**
 375          * Return the "relevant" title.
 376          * A "relevant" title is not necessarily the actual title of the page.
 377          * Special pages like Special:MovePage use set the page they are acting on
 378          * as their "relevant" title, this allows the skin system to display things
 379          * such as content tabs which belong to to that page instead of displaying
 380          * a basic special page tab which has almost no meaning.
 381          */
 382         public function getRelevantTitle() {
 383                 if ( isset($this->mRelevantTitle) ) {
 384                         return $this->mRelevantTitle;
 385                 }
 386                 return $this->mTitle;
 387         }
 388
 389         /**
 390          * Set the "relevant" user
 391          * @see self::getRelevantUser()
 392          * @param $u User object to use
 393          */
 394         public function setRelevantUser( $u ) {
 395                 $this->mRelevantUser = $u;
 396         }
 397
 398         /**
 399          * Return the "relevant" user.
 400          * A "relevant" user is similar to a relevant title. Special pages like
 401          * Special:Contributions mark the user which they are relevant to so that
 402          * things like the toolbox can display the information they usually are only
 403          * able to display on a user's userpage and talkpage.
 404          */
 405         public function getRelevantUser() {
 406                 if ( isset($this->mRelevantUser) ) {
 407                         return $this->mRelevantUser;
 408                 }
 409                 $title = $this->getRelevantTitle();
 410                 if( $title->getNamespace() == NS_USER || $title->getNamespace() == NS_USER_TALK ) {
 411                         $rootUser = strtok( $title->getText(), '/' );
 412                         if ( User::isIP( $rootUser ) ) {
 413                                 $this->mRelevantUser = User::newFromName( $rootUser, false );
 414                         } else {
 415                                 $user = User::newFromName( $rootUser );
 416                                 if ( $user->isLoggedIn() ) {
 417                                         $this->mRelevantUser = $user;
 418                                 }
 419                         }
 420                         return $this->mRelevantUser;
 421                 }
 422                 return null;
 423         }
 424
 425         /**
 426          * Outputs the HTML generated by other functions.
 427          * @param $out Object: instance of OutputPage
 428          * @todo Exterminate!
 429          */
 430         function outputPage( OutputPage $out ) {
 431                 global $wgDebugComments;
 432                 wfProfileIn( __METHOD__ );
 433
 434                 $this->setMembers();
 435                 $this->initPage( $out );
 436
 437                 // See self::afterContentHook() for documentation
 438                 $afterContent = $this->afterContentHook();
 439
 440                 $out->out( $out->headElement( $this ) );
 441
 442                 if ( $wgDebugComments ) {
 443                         $out->out( "<!-- Debug output:\n" .
 444                           $out->mDebugtext . "-->\n" );
 445                 }
 446
 447                 $out->out( $this->beforeContent() );
 448
 449                 $out->out( $out->mBodytext . "\n" );
 450
 451                 $out->out( $this->afterContent() );
 452
 453                 $out->out( $afterContent );
 454
 455                 $out->out( $this->bottomScripts( $out ) );
 456
 457                 $out->out( wfReportTime() );
 458
 459                 $out->out( "\n</body></html>" );
 460                 wfProfileOut( __METHOD__ );
 461         }
 462
 463         static function makeVariablesScript( $data ) {
 464                 if ( $data ) {
 465                         return Html::inlineScript(
 466                                 ResourceLoader::makeLoaderConditionalScript( ResourceLoader::makeConfigSetScript( $data ) )
 467                         );
 468                 } else {
 469                         return '';
 470                 }
 471         }
 472
 473         /**
 474          * Make a <script> tag containing global variables
 475          * @param $skinName string Name of the skin
 476          * The odd calling convention is for backwards compatibility
 477          * @todo FIXME: Make this not depend on $wgTitle!
 478          *
 479          * Do not add things here which can be evaluated in ResourceLoaderStartupScript - in other words, without state.
 480          * You will only be adding bloat to the page and causing page caches to have to be purged on configuration changes.
 481          */
 482         static function makeGlobalVariablesScript( $skinName ) {
 483                 global $wgTitle, $wgUser, $wgRequest, $wgOut, $wgUseAjax, $wgEnableMWSuggest;
 484
 485                 $ns = $wgTitle->getNamespace();
 486                 $nsname = MWNamespace::exists( $ns ) ? MWNamespace::getCanonicalName( $ns ) : $wgTitle->getNsText();
 487                 $vars = array(
 488                         'wgCanonicalNamespace' => $nsname,
 489                         'wgCanonicalSpecialPageName' => $ns == NS_SPECIAL ?
 490                                 SpecialPage::resolveAlias( $wgTitle->getDBkey() ) : false, # bug 21115
 491                         'wgNamespaceNumber' => $wgTitle->getNamespace(),
 492                         'wgPageName' => $wgTitle->getPrefixedDBKey(),
 493                         'wgTitle' => $wgTitle->getText(),
 494                         'wgAction' => $wgRequest->getText( 'action', 'view' ),
 495                         'wgArticleId' => $wgTitle->getArticleId(),
 496                         'wgIsArticle' => $wgOut->isArticle(),
 497                         'wgUserName' => $wgUser->isAnon() ? null : $wgUser->getName(),
 498                         'wgUserGroups' => $wgUser->getEffectiveGroups(),
 499                         'wgCurRevisionId' => $wgTitle->getLatestRevID(),
 500                         'wgCategories' => $wgOut->getCategories(),
 501                         'wgBreakFrames' => $wgOut->getFrameOptions() == 'DENY',
 502                 );
 503                 foreach ( $wgTitle->getRestrictionTypes() as $type ) {
 504                         $vars['wgRestriction' . ucfirst( $type )] = $wgTitle->getRestrictions( $type );
 505                 }
 506                 if ( $wgUseAjax && $wgEnableMWSuggest && !$wgUser->getOption( 'disablesuggest', false ) ) {
 507                         $vars['wgSearchNamespaces'] = SearchEngine::userNamespaces( $wgUser );
 508                 }
 509
 510                 // Allow extensions to add their custom variables to the global JS variables
 511                 wfRunHooks( 'MakeGlobalVariablesScript', array( &$vars ) );
 512
 513                 return self::makeVariablesScript( $vars );
 514         }
 515
 516         /**
 517          * To make it harder for someone to slip a user a fake
 518          * user-JavaScript or user-CSS preview, a random token
 519          * is associated with the login session. If it's not
 520          * passed back with the preview request, we won't render
 521          * the code.
 522          *
 523          * @param $action String: 'edit', 'submit' etc.
 524          * @return bool
 525          */
 526         public function userCanPreview( $action ) {
 527                 global $wgRequest, $wgUser;
 528
 529                 if ( $action != 'submit' ) {
 530                         return false;
 531                 }
 532                 if ( !$wgRequest->wasPosted() ) {
 533                         return false;
 534                 }
 535                 if ( !$this->mTitle->userCanEditCssSubpage() ) {
 536                         return false;
 537                 }
 538                 if ( !$this->mTitle->userCanEditJsSubpage() ) {
 539                         return false;
 540                 }
 541
 542                 return $wgUser->matchEditToken(
 543                         $wgRequest->getVal( 'wpEditToken' ) );
 544         }
 545
 546         /**
 547          * Generated JavaScript action=raw&gen=js
 548          * This returns MediaWiki:Common.js and MediaWiki:[Skinname].js concate-
 549          * nated together.  For some bizarre reason, it does *not* return any
 550          * custom user JS from subpages.  Huh?
 551          *
 552          * There's absolutely no reason to have separate Monobook/Common JSes.
 553          * Any JS that cares can just check the skin variable generated at the
 554          * top.  For now Monobook.js will be maintained, but it should be consi-
 555          * dered deprecated.
 556          *
 557          * @param $skinName String: If set, overrides the skin name
 558          * @return string
 559          */
 560         public function generateUserJs( $skinName = null ) {
 561
 562                 // Stub - see ResourceLoaderSiteModule, CologneBlue, Simple and Standard skins override this
 563
 564                 return '';
 565         }
 566
 567         /**
 568          * Generate user stylesheet for action=raw&gen=css
 569          */
 570         public function generateUserStylesheet() {
 571
 572                 // Stub - see ResourceLoaderUserModule, CologneBlue, Simple and Standard skins override this
 573
 574                 return '';
 575         }
 576
 577         /**
 578          * Split for easier subclassing in SkinSimple, SkinStandard and SkinCologneBlue
 579          * Anything in here won't be generated if $wgAllowUserCssPrefs is false.
 580          */
 581         protected function reallyGenerateUserStylesheet() {
 582
 583                 // Stub - see  ResourceLoaderUserModule, CologneBlue, Simple and Standard skins override this
 584
 585                 return '';
 586         }
 587
 588         /**
 589          * @private
 590          */
 591         function setupUserCss( OutputPage $out ) {
 592                 global $wgRequest;
 593                 global $wgUseSiteCss, $wgAllowUserCss, $wgAllowUserCssPrefs;
 594
 595                 wfProfileIn( __METHOD__ );
 596
 597                 $this->setupSkinUserCss( $out );
 598                 // Add any extension CSS
 599                 foreach ( $out->getExtStyle() as $url ) {
 600                         $out->addStyle( $url );
 601                 }
 602
 603                 // Per-site custom styles
 604                 if ( $wgUseSiteCss ) {
 605                         $out->addModuleStyles( 'site' );
 606                 }
 607
 608                 // Per-user custom styles
 609                 if ( $wgAllowUserCss ) {
 610                         if ( $this->mTitle->isCssSubpage() && $this->userCanPreview( $wgRequest->getVal( 'action' ) ) ) {
 611                                 // @FIXME: properly escape the cdata!
 612                                 $out->addInlineStyle( $wgRequest->getText( 'wpTextbox1' ) );
 613                         } else {
 614                                 $out->addModuleStyles( 'user' );
 615                         }
 616                 }
 617
 618                 // Per-user preference styles
 619                 if ( $wgAllowUserCssPrefs ) {
 620                         $out->addModuleStyles( 'user.options' );
 621                 }
 622
 623                 wfProfileOut( __METHOD__ );
 624         }
 625
 626         /**
 627          * Get the query to generate a dynamic stylesheet
 628          *
 629          * @return array
 630          */
 631         public static function getDynamicStylesheetQuery() {
 632                 global $wgSquidMaxage;
 633
 634                 return array(
 635                                 'action' => 'raw',
 636                                 'maxage' => $wgSquidMaxage,
 637                                 'usemsgcache' => 'yes',
 638                                 'ctype' => 'text/css',
 639                                 'smaxage' => $wgSquidMaxage,
 640                         );
 641         }
 642
 643         /**
 644          * Add skin specific stylesheets
 645          * @param $out OutputPage
 646          * @delete
 647          */
 648         abstract function setupSkinUserCss( OutputPage $out );
 649
 650         function getPageClasses( $title ) {
 651                 $numeric = 'ns-' . $title->getNamespace();
 652
 653                 if ( $title->getNamespace() == NS_SPECIAL ) {
 654                         $type = 'ns-special';
 655                 } elseif ( $title->isTalkPage() ) {
 656                         $type = 'ns-talk';
 657                 } else {
 658                         $type = 'ns-subject';
 659                 }
 660
 661                 $name = Sanitizer::escapeClass( 'page-' . $title->getPrefixedText() );
 662
 663                 return "$numeric $type $name";
 664         }
 665
 666         /**
 667          * This will be called by OutputPage::headElement when it is creating the
 668          * <body> tag, skins can override it if they have a need to add in any
 669          * body attributes or classes of their own.
 670          */
 671         function addToBodyAttributes( $out, &$bodyAttrs ) {
 672                 // does nothing by default
 673         }
 674
 675         /**
 676          * URL to the logo
 677          */
 678         function getLogo() {
 679                 global $wgLogo;
 680                 return $wgLogo;
 681         }
 682
 683         function getCategoryLinks() {
 684                 global $wgOut, $wgUseCategoryBrowser;
 685                 global $wgContLang, $wgUser;
 686
 687                 if ( count( $wgOut->mCategoryLinks ) == 0 ) {
 688                         return '';
 689                 }
 690
 691                 # Separator
 692                 $sep = wfMsgExt( 'catseparator', array( 'parsemag', 'escapenoentities' ) );
 693
 694                 // Use Unicode bidi embedding override characters,
 695                 // to make sure links don't smash each other up in ugly ways.
 696                 $dir = $wgContLang->getDir();
 697                 $embed = "<span dir='$dir'>";
 698                 $pop = '</span>';
 699
 700                 $allCats = $wgOut->getCategoryLinks();
 701                 $s = '';
 702                 $colon = wfMsgExt( 'colon-separator', 'escapenoentities' );
 703
 704                 if ( !empty( $allCats['normal'] ) ) {
 705                         $t = $embed . implode( "{$pop} {$sep} {$embed}" , $allCats['normal'] ) . $pop;
 706
 707                         $msg = wfMsgExt( 'pagecategories', array( 'parsemag', 'escapenoentities' ), count( $allCats['normal'] ) );
 708                         $s .= '<div id="mw-normal-catlinks">' .
 709                                 $this->link( Title::newFromText( wfMsgForContent( 'pagecategorieslink' ) ), $msg )
 710                                 . $colon . $t . '</div>';
 711                 }
 712
 713                 # Hidden categories
 714                 if ( isset( $allCats['hidden'] ) ) {
 715                         if ( $wgUser->getBoolOption( 'showhiddencats' ) ) {
 716                                 $class = 'mw-hidden-cats-user-shown';
 717                         } elseif ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
 718                                 $class = 'mw-hidden-cats-ns-shown';
 719                         } else {
 720                                 $class = 'mw-hidden-cats-hidden';
 721                         }
 722
 723                         $s .= "<div id=\"mw-hidden-catlinks\" class=\"$class\">" .
 724                                 wfMsgExt( 'hidden-categories', array( 'parsemag', 'escapenoentities' ), count( $allCats['hidden'] ) ) .
 725                                 $colon . $embed . implode( "$pop $sep $embed", $allCats['hidden'] ) . $pop .
 726                                 '</div>';
 727                 }
 728
 729                 # optional 'dmoz-like' category browser. Will be shown under the list
 730                 # of categories an article belong to
 731                 if ( $wgUseCategoryBrowser ) {
 732                         $s .= '<br /><hr />';
 733
 734                         # get a big array of the parents tree
 735                         $parenttree = $this->mTitle->getParentCategoryTree();
 736                         # Skin object passed by reference cause it can not be
 737                         # accessed under the method subfunction drawCategoryBrowser
 738                         $tempout = explode( "\n", $this->drawCategoryBrowser( $parenttree, $this ) );
 739                         # Clean out bogus first entry and sort them
 740                         unset( $tempout[0] );
 741                         asort( $tempout );
 742                         # Output one per line
 743                         $s .= implode( "<br />\n", $tempout );
 744                 }
 745
 746                 return $s;
 747         }
 748
 749         /**
 750          * Render the array as a serie of links.
 751          * @param $tree Array: categories tree returned by Title::getParentCategoryTree
 752          * @param &skin Object: skin passed by reference
 753          * @return String separated by &gt;, terminate with "\n"
 754          */
 755         function drawCategoryBrowser( $tree, &$skin ) {
 756                 $return = '';
 757
 758                 foreach ( $tree as $element => $parent ) {
 759                         if ( empty( $parent ) ) {
 760                                 # element start a new list
 761                                 $return .= "\n";
 762                         } else {
 763                                 # grab the others elements
 764                                 $return .= $this->drawCategoryBrowser( $parent, $skin ) . ' &gt; ';
 765                         }
 766
 767                         # add our current element to the list
 768                         $eltitle = Title::newFromText( $element );
 769                         $return .=  $skin->link( $eltitle, $eltitle->getText() );
 770                 }
 771
 772                 return $return;
 773         }
 774
 775         function getCategories() {
 776                 $catlinks = $this->getCategoryLinks();
 777
 778                 $classes = 'catlinks';
 779
 780                 global $wgOut, $wgUser;
 781
 782                 // Check what we're showing
 783                 $allCats = $wgOut->getCategoryLinks();
 784                 $showHidden = $wgUser->getBoolOption( 'showhiddencats' ) ||
 785                                                 $this->mTitle->getNamespace() == NS_CATEGORY;
 786
 787                 if ( empty( $allCats['normal'] ) && !( !empty( $allCats['hidden'] ) && $showHidden ) ) {
 788                         $classes .= ' catlinks-allhidden';
 789                 }
 790
 791                 return "<div id='catlinks' class='$classes'>{$catlinks}</div>";
 792         }
 793
 794         /**
 795          * This runs a hook to allow extensions placing their stuff after content
 796          * and article metadata (e.g. categories).
 797          * Note: This function has nothing to do with afterContent().
 798          *
 799          * This hook is placed here in order to allow using the same hook for all
 800          * skins, both the SkinTemplate based ones and the older ones, which directly
 801          * use this class to get their data.
 802          *
 803          * The output of this function gets processed in SkinTemplate::outputPage() for
 804          * the SkinTemplate based skins, all other skins should directly echo it.
 805          *
 806          * Returns an empty string by default, if not changed by any hook function.
 807          */
 808         protected function afterContentHook() {
 809                 $data = '';
 810
 811                 if ( wfRunHooks( 'SkinAfterContent', array( &$data, $this ) ) ) {
 812                         // adding just some spaces shouldn't toggle the output
 813                         // of the whole <div/>, so we use trim() here
 814                         if ( trim( $data ) != '' ) {
 815                                 // Doing this here instead of in the skins to
 816                                 // ensure that the div has the same ID in all
 817                                 // skins
 818                                 $data = "<div id='mw-data-after-content'>\n" .
 819                                         "\t$data\n" .
 820                                         "</div>\n";
 821                         }
 822                 } else {
 823                         wfDebug( "Hook SkinAfterContent changed output processing.\n" );
 824                 }
 825
 826                 return $data;
 827         }
 828
 829         /**
 830          * Generate debug data HTML for displaying at the bottom of the main content
 831          * area.
 832          * @return String HTML containing debug data, if enabled (otherwise empty).
 833          */
 834         protected function generateDebugHTML() {
 835                 global $wgShowDebug, $wgOut;
 836
 837                 if ( $wgShowDebug ) {
 838                         $listInternals = $this->formatDebugHTML( $wgOut->mDebugtext );
 839                         return "\n<hr />\n<strong>Debug data:</strong><ul style=\"font-family:monospace;\" id=\"mw-debug-html\">" .
 840                                 $listInternals . "</ul>\n";
 841                 }
 842
 843                 return '';
 844         }
 845
 846         private function formatDebugHTML( $debugText ) {
 847                 $lines = explode( "\n", $debugText );
 848                 $curIdent = 0;
 849                 $ret = '<li>';
 850
 851                 foreach ( $lines as $line ) {
 852                         $display = ltrim( $line );
 853                         $ident = strlen( $line ) - strlen( $display );
 854                         $diff = $ident - $curIdent;
 855
 856                         if ( $display == '' ) {
 857                                 $display = "\xc2\xa0";
 858                         }
 859
 860                         if ( !$ident && $diff < 0 && substr( $display, 0, 9 ) != 'Entering ' && substr( $display, 0, 8 ) != 'Exiting ' ) {
 861                                 $ident = $curIdent;
 862                                 $diff = 0;
 863                                 $display = '<span style="background:yellow;">' . htmlspecialchars( $display ) . '</span>';
 864                         } else {
 865                                 $display = htmlspecialchars( $display );
 866                         }
 867
 868                         if ( $diff < 0 ) {
 869                                 $ret .= str_repeat( "</li></ul>\n", -$diff ) . "</li><li>\n";
 870                         } elseif ( $diff == 0 ) {
 871                                 $ret .= "</li><li>\n";
 872                         } else {
 873                                 $ret .= str_repeat( "<ul><li>\n", $diff );
 874                         }
 875                         $ret .= $display . "\n";
 876
 877                         $curIdent = $ident;
 878                 }
 879
 880                 $ret .= str_repeat( '</li></ul>', $curIdent ) . '</li>';
 881
 882                 return $ret;
 883         }
 884
 885         /**
 886          * This gets called shortly before the </body> tag.
 887          * @param $out OutputPage object
 888          * @return String HTML-wrapped JS code to be put before </body>
 889          */
 890         function bottomScripts( $out ) {
 891                 $bottomScriptText = "\n" . $out->getHeadScripts( $this );
 892                 wfRunHooks( 'SkinAfterBottomScripts', array( $this, &$bottomScriptText ) );
 893
 894                 return $bottomScriptText;
 895         }
 896
 897         /** @return string Retrievied from HTML text */
 898         function printSource() {
 899                 $url = htmlspecialchars( $this->mTitle->getFullURL() );
 900                 return wfMsg( 'retrievedfrom', '<a href="' . $url . '">' . $url . '</a>' );
 901         }
 902
 903         function getUndeleteLink() {
 904                 global $wgUser, $wgLang, $wgRequest;
 905
 906                 $action = $wgRequest->getVal( 'action', 'view' );
 907
 908                 if ( $wgUser->isAllowed( 'deletedhistory' ) &&
 909                         ( $this->mTitle->getArticleId() == 0 || $action == 'history' ) ) {
 910                         $n = $this->mTitle->isDeleted();
 911
 912                         if ( $n ) {
 913                                 if ( $wgUser->isAllowed( 'undelete' ) ) {
 914                                         $msg = 'thisisdeleted';
 915                                 } else {
 916                                         $msg = 'viewdeleted';
 917                                 }
 918
 919                                 return wfMsg(
 920                                         $msg,
 921                                         $this->link(
 922                                                 SpecialPage::getTitleFor( 'Undelete', $this->mTitle->getPrefixedDBkey() ),
 923                                                 wfMsgExt( 'restorelink', array( 'parsemag', 'escape' ), $wgLang->formatNum( $n ) ),
 924                                                 array(),
 925                                                 array(),
 926                                                 array( 'known', 'noclasses' )
 927                                         )
 928                                 );
 929                         }
 930                 }
 931
 932                 return '';
 933         }
 934
 935         function subPageSubtitle() {
 936                 $subpages = '';
 937
 938                 if ( !wfRunHooks( 'SkinSubPageSubtitle', array( &$subpages, $this ) ) ) {
 939                         return $subpages;
 940                 }
 941
 942                 global $wgOut;
 943
 944                 if ( $wgOut->isArticle() && MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
 945                         $ptext = $this->mTitle->getPrefixedText();
 946                         if ( preg_match( '/\//', $ptext ) ) {
 947                                 $links = explode( '/', $ptext );
 948                                 array_pop( $links );
 949                                 $c = 0;
 950                                 $growinglink = '';
 951                                 $display = '';
 952
 953                                 foreach ( $links as $link ) {
 954                                         $growinglink .= $link;
 955                                         $display .= $link;
 956                                         $linkObj = Title::newFromText( $growinglink );
 957
 958                                         if ( is_object( $linkObj ) && $linkObj->exists() ) {
 959                                                 $getlink = $this->link(
 960                                                         $linkObj,
 961                                                         htmlspecialchars( $display ),
 962                                                         array(),
 963                                                         array(),
 964                                                         array( 'known', 'noclasses' )
 965                                                 );
 966
 967                                                 $c++;
 968
 969                                                 if ( $c > 1 ) {
 970                                                         $subpages .= wfMsgExt( 'pipe-separator', 'escapenoentities' );
 971                                                 } else  {
 972                                                         $subpages .= '&lt; ';
 973                                                 }
 974
 975                                                 $subpages .= $getlink;
 976                                                 $display = '';
 977                                         } else {
 978                                                 $display .= '/';
 979                                         }
 980                                         $growinglink .= '/';
 981                                 }
 982                         }
 983                 }
 984
 985                 return $subpages;
 986         }
 987
 988         /**
 989          * Returns true if the IP should be shown in the header
 990          */
 991         function showIPinHeader() {
 992                 global $wgShowIPinHeader;
 993                 return $wgShowIPinHeader && session_id() != '';
 994         }
 995
 996         function getSearchLink() {
 997                 $searchPage = SpecialPage::getTitleFor( 'Search' );
 998                 return $searchPage->getLocalURL();
 999         }
1000
1001         function escapeSearchLink() {
1002                 return htmlspecialchars( $this->getSearchLink() );
1003         }
1004
1005         function getCopyright( $type = 'detect' ) {
1006                 global $wgRightsPage, $wgRightsUrl, $wgRightsText, $wgRequest;
1007
1008                 if ( $type == 'detect' ) {
1009                         $diff = $wgRequest->getVal( 'diff' );
1010
1011                         if ( is_null( $diff ) && !$this->isRevisionCurrent() && wfMsgForContent( 'history_copyright' ) !== '-' ) {
1012                                 $type = 'history';
1013                         } else {
1014                                 $type = 'normal';
1015                         }
1016                 }
1017
1018                 if ( $type == 'history' ) {
1019                         $msg = 'history_copyright';
1020                 } else {
1021                         $msg = 'copyright';
1022                 }
1023
1024                 $out = '';
1025
1026                 if ( $wgRightsPage ) {
1027                         $title = Title::newFromText( $wgRightsPage );
1028                         $link = $this->linkKnown( $title, $wgRightsText );
1029                 } elseif ( $wgRightsUrl ) {
1030                         $link = $this->makeExternalLink( $wgRightsUrl, $wgRightsText );
1031                 } elseif ( $wgRightsText ) {
1032                         $link = $wgRightsText;
1033                 } else {
1034                         # Give up now
1035                         return $out;
1036                 }
1037
1038                 // Allow for site and per-namespace customization of copyright notice.
1039                 $forContent = true;
1040
1041                 wfRunHooks( 'SkinCopyrightFooter', array( $this->mTitle, $type, &$msg, &$link, &$forContent ) );
1042
1043                 if ( $forContent ) {
1044                         $out .= wfMsgForContent( $msg, $link );
1045                 } else {
1046                         $out .= wfMsg( $msg, $link );
1047                 }
1048
1049                 return $out;
1050         }
1051
1052         function getCopyrightIcon() {
1053                 global $wgRightsUrl, $wgRightsText, $wgRightsIcon, $wgCopyrightIcon;
1054
1055                 $out = '';
1056
1057                 if ( isset( $wgCopyrightIcon ) && $wgCopyrightIcon ) {
1058                         $out = $wgCopyrightIcon;
1059                 } elseif ( $wgRightsIcon ) {
1060                         $icon = htmlspecialchars( $wgRightsIcon );
1061
1062                         if ( $wgRightsUrl ) {
1063                                 $url = htmlspecialchars( $wgRightsUrl );
1064                                 $out .= '<a href="' . $url . '">';
1065                         }
1066
1067                         $text = htmlspecialchars( $wgRightsText );
1068                         $out .= "<img src=\"$icon\" alt=\"$text\" width=\"88\" height=\"31\" />";
1069
1070                         if ( $wgRightsUrl ) {
1071                                 $out .= '</a>';
1072                         }
1073                 }
1074
1075                 return $out;
1076         }
1077
1078         /**
1079          * Gets the powered by MediaWiki icon.
1080          * @return string
1081          */
1082         function getPoweredBy() {
1083                 global $wgStylePath;
1084
1085                 $url = htmlspecialchars( "$wgStylePath/common/images/poweredby_mediawiki_88x31.png" );
1086                 $text = '<a href="http://www.mediawiki.org/"><img src="' . $url . '" height="31" width="88" alt="Powered by MediaWiki" /></a>';
1087                 wfRunHooks( 'SkinGetPoweredBy', array( &$text, $this ) );
1088                 return $text;
1089         }
1090
1091         /**
1092          * Get the timestamp of the latest revision, formatted in user language
1093          *
1094          * @param $article Article object. Used if we're working with the current revision
1095          * @return String
1096          */
1097         protected function lastModified( $article ) {
1098                 global $wgLang;
1099
1100                 if ( !$this->isRevisionCurrent() ) {
1101                         $timestamp = Revision::getTimestampFromId( $this->mTitle, $this->mRevisionId );
1102                 } else {
1103                         $timestamp = $article->getTimestamp();
1104                 }
1105
1106                 if ( $timestamp ) {
1107                         $d = $wgLang->date( $timestamp, true );
1108                         $t = $wgLang->time( $timestamp, true );
1109                         $s = ' ' . wfMsg( 'lastmodifiedat', $d, $t );
1110                 } else {
1111                         $s = '';
1112                 }
1113
1114                 if ( wfGetLB()->getLaggedSlaveMode() ) {
1115                         $s .= ' <strong>' . wfMsg( 'laggedslavemode' ) . '</strong>';
1116                 }
1117
1118                 return $s;
1119         }
1120
1121         function logoText( $align = '' ) {
1122                 if ( $align != '' ) {
1123                         $a = " align='{$align}'";
1124                 } else {
1125                         $a = '';
1126                 }
1127
1128                 $mp = wfMsg( 'mainpage' );
1129                 $mptitle = Title::newMainPage();
1130                 $url = ( is_object( $mptitle ) ? $mptitle->escapeLocalURL() : '' );
1131
1132                 $logourl = $this->getLogo();
1133                 $s = "<a href='{$url}'><img{$a} src='{$logourl}' alt='[{$mp}]' /></a>";
1134
1135                 return $s;
1136         }
1137
1138         /**
1139          * Renders a $wgFooterIcons icon acording to the method's arguments
1140          * @param $icon Array: The icon to build the html for, see $wgFooterIcons for the format of this array
1141          * @param $withImage Boolean: Whether to use the icon's image or output a text-only footericon
1142          */
1143         function makeFooterIcon( $icon, $withImage = 'withImage' ) {
1144                 if ( is_string( $icon ) ) {
1145                         $html = $icon;
1146                 } else { // Assuming array
1147                         $url = isset($icon["url"]) ? $icon["url"] : null;
1148                         unset( $icon["url"] );
1149                         if ( isset( $icon["src"] ) && $withImage === 'withImage' ) {
1150                                 $html = Html::element( 'img', $icon ); // do this the lazy way, just pass icon data as an attribute array
1151                         } else {
1152                                 $html = htmlspecialchars( $icon["alt"] );
1153                         }
1154                         if ( $url ) {
1155                                 $html = Html::rawElement( 'a', array( "href" => $url ), $html );
1156                         }
1157                 }
1158                 return $html;
1159         }
1160
1161         /**
1162          * Gets the link to the wiki's main page.
1163          * @return string
1164          */
1165         function mainPageLink() {
1166                 $s = $this->link(
1167                         Title::newMainPage(),
1168                         wfMsg( 'mainpage' ),
1169                         array(),
1170                         array(),
1171                         array( 'known', 'noclasses' )
1172                 );
1173
1174                 return $s;
1175         }
1176
1177         public function footerLink( $desc, $page ) {
1178                 // if the link description has been set to "-" in the default language,
1179                 if ( wfMsgForContent( $desc )  == '-' ) {
1180                         // then it is disabled, for all languages.
1181                         return '';
1182                 } else {
1183                         // Otherwise, we display the link for the user, described in their
1184                         // language (which may or may not be the same as the default language),
1185                         // but we make the link target be the one site-wide page.
1186                         $title = Title::newFromText( wfMsgForContent( $page ) );
1187
1188                         return $this->linkKnown(
1189                                 $title,
1190                                 wfMsgExt( $desc, array( 'parsemag', 'escapenoentities' ) )
1191                         );
1192                 }
1193         }
1194
1195         /**
1196          * Gets the link to the wiki's privacy policy page.
1197          */
1198         function privacyLink() {
1199                 return $this->footerLink( 'privacy', 'privacypage' );
1200         }
1201
1202         /**
1203          * Gets the link to the wiki's about page.
1204          */
1205         function aboutLink() {
1206                 return $this->footerLink( 'aboutsite', 'aboutpage' );
1207         }
1208
1209         /**
1210          * Gets the link to the wiki's general disclaimers page.
1211          */
1212         function disclaimerLink() {
1213                 return $this->footerLink( 'disclaimers', 'disclaimerpage' );
1214         }
1215
1216         /**
1217          * Return URL options for the 'edit page' link.
1218          * This may include an 'oldid' specifier, if the current page view is such.
1219          *
1220          * @return array
1221          * @private
1222          */
1223         function editUrlOptions() {
1224                 $options = array( 'action' => 'edit' );
1225
1226                 if ( !$this->isRevisionCurrent() ) {
1227                         $options['oldid'] = intval( $this->mRevisionId );
1228                 }
1229
1230                 return $options;
1231         }
1232
1233         function showEmailUser( $id ) {
1234                 global $wgUser;
1235                 $targetUser = User::newFromId( $id );
1236                 return $wgUser->canSendEmail() && # the sending user must have a confirmed email address
1237                         $targetUser->canReceiveEmail(); # the target user must have a confirmed email address and allow emails from users
1238         }
1239
1240         /**
1241          * Return a fully resolved style path url to images or styles stored in the common folder.
1242          * This method returns a url resolved using the configured skin style path
1243          * and includes the style version inside of the url.
1244          * @param $name String: The name or path of a skin resource file
1245          * @return String The fully resolved style path url including styleversion
1246          */
1247         function getCommonStylePath( $name ) {
1248                 global $wgStylePath, $wgStyleVersion;
1249                 return "$wgStylePath/common/$name?$wgStyleVersion";
1250         }
1251
1252         /**
1253          * Return a fully resolved style path url to images or styles stored in the curent skins's folder.
1254          * This method returns a url resolved using the configured skin style path
1255          * and includes the style version inside of the url.
1256          * @param $name String: The name or path of a skin resource file
1257          * @return String The fully resolved style path url including styleversion
1258          */
1259         function getSkinStylePath( $name ) {
1260                 global $wgStylePath, $wgStyleVersion;
1261                 return "$wgStylePath/{$this->stylename}/$name?$wgStyleVersion";
1262         }
1263
1264         /* these are used extensively in SkinTemplate, but also some other places */
1265         static function makeMainPageUrl( $urlaction = '' ) {
1266                 $title = Title::newMainPage();
1267                 self::checkTitle( $title, '' );
1268
1269                 return $title->getLocalURL( $urlaction );
1270         }
1271
1272         static function makeSpecialUrl( $name, $urlaction = '' ) {
1273                 $title = SpecialPage::getTitleFor( $name );
1274                 return $title->getLocalURL( $urlaction );
1275         }
1276
1277         static function makeSpecialUrlSubpage( $name, $subpage, $urlaction = '' ) {
1278                 $title = SpecialPage::getSafeTitleFor( $name, $subpage );
1279                 return $title->getLocalURL( $urlaction );
1280         }
1281
1282         static function makeI18nUrl( $name, $urlaction = '' ) {
1283                 $title = Title::newFromText( wfMsgForContent( $name ) );
1284                 self::checkTitle( $title, $name );
1285                 return $title->getLocalURL( $urlaction );
1286         }
1287
1288         static function makeUrl( $name, $urlaction = '' ) {
1289                 $title = Title::newFromText( $name );
1290                 self::checkTitle( $title, $name );
1291
1292                 return $title->getLocalURL( $urlaction );
1293         }
1294
1295         /**
1296          * If url string starts with http, consider as external URL, else
1297          * internal
1298          */
1299         static function makeInternalOrExternalUrl( $name ) {
1300                 if ( preg_match( '/^(?:' . wfUrlProtocols() . ')/', $name ) ) {
1301                         return $name;
1302                 } else {
1303                         return self::makeUrl( $name );
1304                 }
1305         }
1306
1307         # this can be passed the NS number as defined in Language.php
1308         static function makeNSUrl( $name, $urlaction = '', $namespace = NS_MAIN ) {
1309                 $title = Title::makeTitleSafe( $namespace, $name );
1310                 self::checkTitle( $title, $name );
1311
1312                 return $title->getLocalURL( $urlaction );
1313         }
1314
1315         /* these return an array with the 'href' and boolean 'exists' */
1316         static function makeUrlDetails( $name, $urlaction = '' ) {
1317                 $title = Title::newFromText( $name );
1318                 self::checkTitle( $title, $name );
1319
1320                 return array(
1321                         'href' => $title->getLocalURL( $urlaction ),
1322                         'exists' => $title->getArticleID() != 0,
1323                 );
1324         }
1325
1326         /**
1327          * Make URL details where the article exists (or at least it's convenient to think so)
1328          */
1329         static function makeKnownUrlDetails( $name, $urlaction = '' ) {
1330                 $title = Title::newFromText( $name );
1331                 self::checkTitle( $title, $name );
1332
1333                 return array(
1334                         'href' => $title->getLocalURL( $urlaction ),
1335                         'exists' => true
1336                 );
1337         }
1338
1339         # make sure we have some title to operate on
1340         static function checkTitle( &$title, $name ) {
1341                 if ( !is_object( $title ) ) {
1342                         $title = Title::newFromText( $name );
1343                         if ( !is_object( $title ) ) {
1344                                 $title = Title::newFromText( '--error: link target missing--' );
1345                         }
1346                 }
1347         }
1348
1349         /**
1350          * Build an array that represents the sidebar(s), the navigation bar among them
1351          *
1352          * @return array
1353          */
1354         function buildSidebar() {
1355                 global $parserMemc, $wgEnableSidebarCache, $wgSidebarCacheExpiry;
1356                 global $wgLang;
1357                 wfProfileIn( __METHOD__ );
1358
1359                 $key = wfMemcKey( 'sidebar', $wgLang->getCode() );
1360
1361                 if ( $wgEnableSidebarCache ) {
1362                         $cachedsidebar = $parserMemc->get( $key );
1363                         if ( $cachedsidebar ) {
1364                                 wfProfileOut( __METHOD__ );
1365                                 return $cachedsidebar;
1366                         }
1367                 }
1368
1369                 $bar = array();
1370                 $this->addToSidebar( $bar, 'sidebar' );
1371
1372                 wfRunHooks( 'SkinBuildSidebar', array( $this, &$bar ) );
1373                 if ( $wgEnableSidebarCache ) {
1374                         $parserMemc->set( $key, $bar, $wgSidebarCacheExpiry );
1375                 }
1376
1377                 wfProfileOut( __METHOD__ );
1378                 return $bar;
1379         }
1380         /**
1381          * Add content from a sidebar system message
1382          * Currently only used for MediaWiki:Sidebar (but may be used by Extensions)
1383          *
1384          * This is just a wrapper around addToSidebarPlain() for backwards compatibility
1385          *
1386          * @param &$bar array
1387          * @param $message String
1388          */
1389         function addToSidebar( &$bar, $message ) {
1390                 $this->addToSidebarPlain( $bar, wfMsgForContent( $message ) );
1391         }
1392
1393         /**
1394          * Add content from plain text
1395          * @since 1.17
1396          * @param &$bar array
1397          * @param $text string
1398          */
1399         function addToSidebarPlain( &$bar, $text ) {
1400                 $lines = explode( "\n", $text );
1401                 $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.
1402
1403                 $heading = '';
1404
1405                 foreach ( $lines as $line ) {
1406                         if ( strpos( $line, '*' ) !== 0 ) {
1407                                 continue;
1408                         }
1409
1410                         if ( strpos( $line, '**' ) !== 0 ) {
1411                                 $heading = trim( $line, '* ' );
1412                                 if ( !array_key_exists( $heading, $bar ) ) {
1413                                         $bar[$heading] = array();
1414                                 }
1415                         } else {
1416                                 $line = trim( $line, '* ' );
1417
1418                                 if ( strpos( $line, '|' ) !== false ) { // sanity check
1419                                         $line = array_map( 'trim', explode( '|', $line, 2 ) );
1420                                         $link = wfMsgForContent( $line[0] );
1421
1422                                         if ( $link == '-' ) {
1423                                                 continue;
1424                                         }
1425
1426                                         $text = wfMsgExt( $line[1], 'parsemag' );
1427
1428                                         if ( wfEmptyMsg( $line[1], $text ) ) {
1429                                                 $text = $line[1];
1430                                         }
1431
1432                                         if ( wfEmptyMsg( $line[0], $link ) ) {
1433                                                 $link = $line[0];
1434                                         }
1435
1436                                         if ( preg_match( '/^(?:' . wfUrlProtocols() . ')/', $link ) ) {
1437                                                 $href = $link;
1438                                         } else {
1439                                                 $title = Title::newFromText( $link );
1440
1441                                                 if ( $title ) {
1442                                                         $title = $title->fixSpecialName();
1443                                                         $href = $title->getLocalURL();
1444                                                 } else {
1445                                                         $href = 'INVALID-TITLE';
1446                                                 }
1447                                         }
1448
1449                                         $bar[$heading][] = array(
1450                                                 'text' => $text,
1451                                                 'href' => $href,
1452                                                 'id' => 'n-' . strtr( $line[1], ' ', '-' ),
1453                                                 'active' => false
1454                                         );
1455                                 } else if ( ( substr( $line, 0, 2 ) == '{{' ) && ( substr( $line, -2 ) == '}}' ) ) {
1456                                         global $wgParser, $wgTitle;
1457
1458                                         $line = substr( $line, 2, strlen( $line ) - 4 );
1459
1460                                         $options = new ParserOptions();
1461                                         $options->setEditSection( false );
1462                                         $options->setInterfaceMessage( true );
1463                                         $wikiBar[$heading] = $wgParser->parse( wfMsgForContentNoTrans( $line ) , $wgTitle, $options )->getText();
1464                                 } else {
1465                                         continue;
1466                                 }
1467                         }
1468                 }
1469
1470                 if ( count( $wikiBar ) > 0 ) {
1471                         $bar = array_merge( $bar, $wikiBar );
1472                 }
1473
1474                 return $bar;
1475         }
1476
1477         /**
1478          * Should we include common/wikiprintable.css?  Skins that have their own
1479          * print stylesheet should override this and return false.  (This is an
1480          * ugly hack to get Monobook to play nicely with
1481          * OutputPage::headElement().)
1482          *
1483          * @return bool
1484          */
1485         public function commonPrintStylesheet() {
1486                 return true;
1487         }
1488
1489         /**
1490          * Gets new talk page messages for the current user.
1491          * @return MediaWiki message or if no new talk page messages, nothing
1492          */
1493         function getNewtalks() {
1494                 global $wgUser, $wgOut;
1495
1496                 $newtalks = $wgUser->getNewMessageLinks();
1497                 $ntl = '';
1498
1499                 if ( count( $newtalks ) == 1 && $newtalks[0]['wiki'] === wfWikiID() ) {
1500                         $userTitle = $this->mUser->getUserPage();
1501                         $userTalkTitle = $userTitle->getTalkPage();
1502
1503                         if ( !$userTalkTitle->equals( $this->mTitle ) ) {
1504                                 $newMessagesLink = $this->link(
1505                                         $userTalkTitle,
1506                                         wfMsgHtml( 'newmessageslink' ),
1507                                         array(),
1508                                         array( 'redirect' => 'no' ),
1509                                         array( 'known', 'noclasses' )
1510                                 );
1511
1512                                 $newMessagesDiffLink = $this->link(
1513                                         $userTalkTitle,
1514                                         wfMsgHtml( 'newmessagesdifflink' ),
1515                                         array(),
1516                                         array( 'diff' => 'cur' ),
1517                                         array( 'known', 'noclasses' )
1518                                 );
1519
1520                                 $ntl = wfMsg(
1521                                         'youhavenewmessages',
1522                                         $newMessagesLink,
1523                                         $newMessagesDiffLink
1524                                 );
1525                                 # Disable Squid cache
1526                                 $wgOut->setSquidMaxage( 0 );
1527                         }
1528                 } elseif ( count( $newtalks ) ) {
1529                         // _>" " for BC <= 1.16
1530                         $sep = str_replace( '_', ' ', wfMsgHtml( 'newtalkseparator' ) );
1531                         $msgs = array();
1532
1533                         foreach ( $newtalks as $newtalk ) {
1534                                 $msgs[] = Xml::element(
1535                                         'a',
1536                                         array( 'href' => $newtalk['link'] ), $newtalk['wiki']
1537                                 );
1538                         }
1539                         $parts = implode( $sep, $msgs );
1540                         $ntl = wfMsgHtml( 'youhavenewmessagesmulti', $parts );
1541                         $wgOut->setSquidMaxage( 0 );
1542                 }
1543
1544                 return $ntl;
1545         }
1546 }