includes/Skin.php

   1 <?php
   2 /**
   3  * Base class for all skins.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * @defgroup Skins Skins
  25  */
  26
  27 /**
  28  * The main skin class which provides methods and properties for all other skins.
  29  * This base class is also the "Standard" skin.
  30  *
  31  * See docs/skin.txt for more information.
  32  *
  33  * @ingroup Skins
  34  */
  35 abstract class Skin extends ContextSource {
  36         protected $skinname = 'standard';
  37         protected $mRelevantTitle = null;
  38         protected $mRelevantUser = null;
  39
  40         /**
  41          * Fetch the set of available skins.
  42          * @return array associative array of strings
  43          */
  44         static function getSkinNames() {
  45                 global $wgValidSkinNames;
  46                 static $skinsInitialised = false;
  47
  48                 if ( !$skinsInitialised || !count( $wgValidSkinNames ) ) {
  49                         # Get a list of available skins
  50                         # Build using the regular expression '^(.*).php$'
  51                         # Array keys are all lower case, array value keep the case used by filename
  52                         #
  53                         wfProfileIn( __METHOD__ . '-init' );
  54
  55                         global $wgStyleDirectory;
  56
  57                         $skinDir = dir( $wgStyleDirectory );
  58
  59                         if ( $skinDir !== false && $skinDir !== null ) {
  60                                 # while code from www.php.net
  61                                 while ( false !== ( $file = $skinDir->read() ) ) {
  62                                         // Skip non-PHP files, hidden files, and '.dep' includes
  63                                         $matches = array();
  64
  65                                         if ( preg_match( '/^([^.]*)\.php$/', $file, $matches ) ) {
  66                                                 $aSkin = $matches[1];
  67                                                 $wgValidSkinNames[strtolower( $aSkin )] = $aSkin;
  68                                         }
  69                                 }
  70                                 $skinDir->close();
  71                         }
  72                         $skinsInitialised = true;
  73                         wfProfileOut( __METHOD__ . '-init' );
  74                 }
  75                 return $wgValidSkinNames;
  76         }
  77
  78         /**
  79          * Fetch the skinname messages for available skins.
  80          * @return array of strings
  81          */
  82         static function getSkinNameMessages() {
  83                 $messages = array();
  84                 foreach ( self::getSkinNames() as $skinKey => $skinName ) {
  85                         $messages[] = "skinname-$skinKey";
  86                 }
  87                 return $messages;
  88         }
  89
  90         /**
  91          * Fetch the list of user-selectable skins in regards to $wgSkipSkins.
  92          * Useful for Special:Preferences and other places where you
  93          * only want to show skins users _can_ use.
  94          * @return array of strings
  95          */
  96         public static function getUsableSkins() {
  97                 global $wgSkipSkins;
  98
  99                 $allowedSkins = self::getSkinNames();
 100
 101                 foreach ( $wgSkipSkins as $skip ) {
 102                         unset( $allowedSkins[$skip] );
 103                 }
 104
 105                 return $allowedSkins;
 106         }
 107
 108         /**
 109          * Normalize a skin preference value to a form that can be loaded.
 110          * If a skin can't be found, it will fall back to the configured
 111          * default (or the old 'Classic' skin if that's broken).
 112          * @param string $key 'monobook', 'standard', etc.
 113          * @return string
 114          */
 115         static function normalizeKey( $key ) {
 116                 global $wgDefaultSkin;
 117
 118                 $skinNames = Skin::getSkinNames();
 119
 120                 if ( $key == '' || $key == 'default' ) {
 121                         // Don't return the default immediately;
 122                         // in a misconfiguration we need to fall back.
 123                         $key = $wgDefaultSkin;
 124                 }
 125
 126                 if ( isset( $skinNames[$key] ) ) {
 127                         return $key;
 128                 }
 129
 130                 // Older versions of the software used a numeric setting
 131                 // in the user preferences.
 132                 $fallback = array(
 133                         0 => $wgDefaultSkin,
 134                         2 => 'cologneblue'
 135                 );
 136
 137                 if ( isset( $fallback[$key] ) ) {
 138                         $key = $fallback[$key];
 139                 }
 140
 141                 if ( isset( $skinNames[$key] ) ) {
 142                         return $key;
 143                 } elseif ( isset( $skinNames[$wgDefaultSkin] ) ) {
 144                         return $wgDefaultSkin;
 145                 } else {
 146                         return 'vector';
 147                 }
 148         }
 149
 150         /**
 151          * Factory method for loading a skin of a given type
 152          * @param string $key 'monobook', 'standard', etc.
 153          * @return Skin
 154          */
 155         static function &newFromKey( $key ) {
 156                 global $wgStyleDirectory;
 157
 158                 $key = Skin::normalizeKey( $key );
 159
 160                 $skinNames = Skin::getSkinNames();
 161                 $skinName = $skinNames[$key];
 162                 $className = "Skin{$skinName}";
 163
 164                 # Grab the skin class and initialise it.
 165                 if ( !class_exists( $className ) ) {
 166
 167                         require_once "{$wgStyleDirectory}/{$skinName}.php";
 168
 169                         # Check if we got if not fallback to default skin
 170                         if ( !class_exists( $className ) ) {
 171                                 # DO NOT die if the class isn't found. This breaks maintenance
 172                                 # scripts and can cause a user account to be unrecoverable
 173                                 # except by SQL manipulation if a previously valid skin name
 174                                 # is no longer valid.
 175                                 wfDebug( "Skin class does not exist: $className\n" );
 176                                 $className = 'SkinVector';
 177                                 require_once "{$wgStyleDirectory}/Vector.php";
 178                         }
 179                 }
 180                 $skin = new $className( $key );
 181                 return $skin;
 182         }
 183
 184         /** @return string skin name */
 185         public function getSkinName() {
 186                 return $this->skinname;
 187         }
 188
 189         /**
 190          * @param $out OutputPage
 191          */
 192         function initPage( OutputPage $out ) {
 193                 wfProfileIn( __METHOD__ );
 194
 195                 $this->preloadExistence();
 196
 197                 wfProfileOut( __METHOD__ );
 198         }
 199
 200         /**
 201          * Preload the existence of three commonly-requested pages in a single query
 202          */
 203         function preloadExistence() {
 204                 $user = $this->getUser();
 205
 206                 // User/talk link
 207                 $titles = array( $user->getUserPage(), $user->getTalkPage() );
 208
 209                 // Other tab link
 210                 if ( $this->getTitle()->isSpecialPage() ) {
 211                         // nothing
 212                 } elseif ( $this->getTitle()->isTalkPage() ) {
 213                         $titles[] = $this->getTitle()->getSubjectPage();
 214                 } else {
 215                         $titles[] = $this->getTitle()->getTalkPage();
 216                 }
 217
 218                 $lb = new LinkBatch( $titles );
 219                 $lb->setCaller( __METHOD__ );
 220                 $lb->execute();
 221         }
 222
 223         /**
 224          * Get the current revision ID
 225          *
 226          * @return Integer
 227          */
 228         public function getRevisionId() {
 229                 return $this->getOutput()->getRevisionId();
 230         }
 231
 232         /**
 233          * Whether the revision displayed is the latest revision of the page
 234          *
 235          * @return Boolean
 236          */
 237         public function isRevisionCurrent() {
 238                 $revID = $this->getRevisionId();
 239                 return $revID == 0 || $revID == $this->getTitle()->getLatestRevID();
 240         }
 241
 242         /**
 243          * Set the "relevant" title
 244          * @see self::getRelevantTitle()
 245          * @param $t Title object to use
 246          */
 247         public function setRelevantTitle( $t ) {
 248                 $this->mRelevantTitle = $t;
 249         }
 250
 251         /**
 252          * Return the "relevant" title.
 253          * A "relevant" title is not necessarily the actual title of the page.
 254          * Special pages like Special:MovePage use set the page they are acting on
 255          * as their "relevant" title, this allows the skin system to display things
 256          * such as content tabs which belong to to that page instead of displaying
 257          * a basic special page tab which has almost no meaning.
 258          *
 259          * @return Title
 260          */
 261         public function getRelevantTitle() {
 262                 if ( isset( $this->mRelevantTitle ) ) {
 263                         return $this->mRelevantTitle;
 264                 }
 265                 return $this->getTitle();
 266         }
 267
 268         /**
 269          * Set the "relevant" user
 270          * @see self::getRelevantUser()
 271          * @param $u User object to use
 272          */
 273         public function setRelevantUser( $u ) {
 274                 $this->mRelevantUser = $u;
 275         }
 276
 277         /**
 278          * Return the "relevant" user.
 279          * A "relevant" user is similar to a relevant title. Special pages like
 280          * Special:Contributions mark the user which they are relevant to so that
 281          * things like the toolbox can display the information they usually are only
 282          * able to display on a user's userpage and talkpage.
 283          * @return User
 284          */
 285         public function getRelevantUser() {
 286                 if ( isset( $this->mRelevantUser ) ) {
 287                         return $this->mRelevantUser;
 288                 }
 289                 $title = $this->getRelevantTitle();
 290                 if ( $title->hasSubjectNamespace( NS_USER ) ) {
 291                         $rootUser = $title->getRootText();
 292                         if ( User::isIP( $rootUser ) ) {
 293                                 $this->mRelevantUser = User::newFromName( $rootUser, false );
 294                         } else {
 295                                 $user = User::newFromName( $rootUser, false );
 296                                 if ( $user && $user->isLoggedIn() ) {
 297                                         $this->mRelevantUser = $user;
 298                                 }
 299                         }
 300                         return $this->mRelevantUser;
 301                 }
 302                 return null;
 303         }
 304
 305         /**
 306          * Outputs the HTML generated by other functions.
 307          * @param $out OutputPage
 308          */
 309         abstract function outputPage( OutputPage $out = null );
 310
 311         /**
 312          * @param $data array
 313          * @return string
 314          */
 315         static function makeVariablesScript( $data ) {
 316                 if ( $data ) {
 317                         return Html::inlineScript(
 318                                 ResourceLoader::makeLoaderConditionalScript( ResourceLoader::makeConfigSetScript( $data ) )
 319                         );
 320                 } else {
 321                         return '';
 322                 }
 323         }
 324
 325         /**
 326          * Make a "<script>" tag containing global variables
 327          *
 328          * @deprecated in 1.19
 329          * @param $unused
 330          * @return string HTML fragment
 331          */
 332         public static function makeGlobalVariablesScript( $unused ) {
 333                 global $wgOut;
 334
 335                 wfDeprecated( __METHOD__, '1.19' );
 336
 337                 return self::makeVariablesScript( $wgOut->getJSVars() );
 338         }
 339
 340         /**
 341          * Get the query to generate a dynamic stylesheet
 342          *
 343          * @return array
 344          */
 345         public static function getDynamicStylesheetQuery() {
 346                 global $wgSquidMaxage;
 347
 348                 return array(
 349                                 'action' => 'raw',
 350                                 'maxage' => $wgSquidMaxage,
 351                                 'usemsgcache' => 'yes',
 352                                 'ctype' => 'text/css',
 353                                 'smaxage' => $wgSquidMaxage,
 354                         );
 355         }
 356
 357         /**
 358          * Add skin specific stylesheets
 359          * Calling this method with an $out of anything but the same OutputPage
 360          * inside ->getOutput() is deprecated. The $out arg is kept
 361          * for compatibility purposes with skins.
 362          * @param $out OutputPage
 363          * @todo delete
 364          */
 365         abstract function setupSkinUserCss( OutputPage $out );
 366
 367         /**
 368          * TODO: document
 369          * @param $title Title
 370          * @return String
 371          */
 372         function getPageClasses( $title ) {
 373                 $numeric = 'ns-' . $title->getNamespace();
 374
 375                 if ( $title->isSpecialPage() ) {
 376                         $type = 'ns-special';
 377                         // bug 23315: provide a class based on the canonical special page name without subpages
 378                         list( $canonicalName ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );
 379                         if ( $canonicalName ) {
 380                                 $type .= ' ' . Sanitizer::escapeClass( "mw-special-$canonicalName" );
 381                         } else {
 382                                 $type .= ' mw-invalidspecialpage';
 383                         }
 384                 } elseif ( $title->isTalkPage() ) {
 385                         $type = 'ns-talk';
 386                 } else {
 387                         $type = 'ns-subject';
 388                 }
 389
 390                 $name = Sanitizer::escapeClass( 'page-' . $title->getPrefixedText() );
 391
 392                 return "$numeric $type $name";
 393         }
 394
 395         /**
 396          * This will be called by OutputPage::headElement when it is creating the
 397          * "<body>" tag, skins can override it if they have a need to add in any
 398          * body attributes or classes of their own.
 399          * @param $out OutputPage
 400          * @param $bodyAttrs Array
 401          */
 402         function addToBodyAttributes( $out, &$bodyAttrs ) {
 403                 // does nothing by default
 404         }
 405
 406         /**
 407          * URL to the logo
 408          * @return String
 409          */
 410         function getLogo() {
 411                 global $wgLogo;
 412                 return $wgLogo;
 413         }
 414
 415         /**
 416          * @return string
 417          */
 418         function getCategoryLinks() {
 419                 global $wgUseCategoryBrowser;
 420
 421                 $out = $this->getOutput();
 422                 $allCats = $out->getCategoryLinks();
 423
 424                 if ( !count( $allCats ) ) {
 425                         return '';
 426                 }
 427
 428                 $embed = "<li>";
 429                 $pop = "</li>";
 430
 431                 $s = '';
 432                 $colon = $this->msg( 'colon-separator' )->escaped();
 433
 434                 if ( !empty( $allCats['normal'] ) ) {
 435                         $t = $embed . implode( "{$pop}{$embed}", $allCats['normal'] ) . $pop;
 436
 437                         $msg = $this->msg( 'pagecategories' )->numParams( count( $allCats['normal'] ) )->escaped();
 438                         $linkPage = wfMessage( 'pagecategorieslink' )->inContentLanguage()->text();
 439                         $s .= '<div id="mw-normal-catlinks" class="mw-normal-catlinks">' .
 440                                 Linker::link( Title::newFromText( $linkPage ), $msg )
 441                                 . $colon . '<ul>' . $t . '</ul>' . '</div>';
 442                 }
 443
 444                 # Hidden categories
 445                 if ( isset( $allCats['hidden'] ) ) {
 446                         if ( $this->getUser()->getBoolOption( 'showhiddencats' ) ) {
 447                                 $class = ' mw-hidden-cats-user-shown';
 448                         } elseif ( $this->getTitle()->getNamespace() == NS_CATEGORY ) {
 449                                 $class = ' mw-hidden-cats-ns-shown';
 450                         } else {
 451                                 $class = ' mw-hidden-cats-hidden';
 452                         }
 453
 454                         $s .= "<div id=\"mw-hidden-catlinks\" class=\"mw-hidden-catlinks$class\">" .
 455                                 $this->msg( 'hidden-categories' )->numParams( count( $allCats['hidden'] ) )->escaped() .
 456                                 $colon . '<ul>' . $embed . implode( "{$pop}{$embed}", $allCats['hidden'] ) . $pop . '</ul>' .
 457                                 '</div>';
 458                 }
 459
 460                 # optional 'dmoz-like' category browser. Will be shown under the list
 461                 # of categories an article belong to
 462                 if ( $wgUseCategoryBrowser ) {
 463                         $s .= '<br /><hr />';
 464
 465                         # get a big array of the parents tree
 466                         $parenttree = $this->getTitle()->getParentCategoryTree();
 467                         # Skin object passed by reference cause it can not be
 468                         # accessed under the method subfunction drawCategoryBrowser
 469                         $tempout = explode( "\n", $this->drawCategoryBrowser( $parenttree ) );
 470                         # Clean out bogus first entry and sort them
 471                         unset( $tempout[0] );
 472                         asort( $tempout );
 473                         # Output one per line
 474                         $s .= implode( "<br />\n", $tempout );
 475                 }
 476
 477                 return $s;
 478         }
 479
 480         /**
 481          * Render the array as a series of links.
 482          * @param array $tree categories tree returned by Title::getParentCategoryTree
 483          * @return String separated by &gt;, terminate with "\n"
 484          */
 485         function drawCategoryBrowser( $tree ) {
 486                 $return = '';
 487
 488                 foreach ( $tree as $element => $parent ) {
 489                         if ( empty( $parent ) ) {
 490                                 # element start a new list
 491                                 $return .= "\n";
 492                         } else {
 493                                 # grab the others elements
 494                                 $return .= $this->drawCategoryBrowser( $parent ) . ' &gt; ';
 495                         }
 496
 497                         # add our current element to the list
 498                         $eltitle = Title::newFromText( $element );
 499                         $return .= Linker::link( $eltitle, htmlspecialchars( $eltitle->getText() ) );
 500                 }
 501
 502                 return $return;
 503         }
 504
 505         /**
 506          * @return string
 507          */
 508         function getCategories() {
 509                 $out = $this->getOutput();
 510
 511                 $catlinks = $this->getCategoryLinks();
 512
 513                 $classes = 'catlinks';
 514
 515                 // Check what we're showing
 516                 $allCats = $out->getCategoryLinks();
 517                 $showHidden = $this->getUser()->getBoolOption( 'showhiddencats' ) ||
 518                                                 $this->getTitle()->getNamespace() == NS_CATEGORY;
 519
 520                 if ( empty( $allCats['normal'] ) && !( !empty( $allCats['hidden'] ) && $showHidden ) ) {
 521                         $classes .= ' catlinks-allhidden';
 522                 }
 523
 524                 return "<div id='catlinks' class='$classes'>{$catlinks}</div>";
 525         }
 526
 527         /**
 528          * This runs a hook to allow extensions placing their stuff after content
 529          * and article metadata (e.g. categories).
 530          * Note: This function has nothing to do with afterContent().
 531          *
 532          * This hook is placed here in order to allow using the same hook for all
 533          * skins, both the SkinTemplate based ones and the older ones, which directly
 534          * use this class to get their data.
 535          *
 536          * The output of this function gets processed in SkinTemplate::outputPage() for
 537          * the SkinTemplate based skins, all other skins should directly echo it.
 538          *
 539          * @return String, empty by default, if not changed by any hook function.
 540          */
 541         protected function afterContentHook() {
 542                 $data = '';
 543
 544                 if ( wfRunHooks( 'SkinAfterContent', array( &$data, $this ) ) ) {
 545                         // adding just some spaces shouldn't toggle the output
 546                         // of the whole <div/>, so we use trim() here
 547                         if ( trim( $data ) != '' ) {
 548                                 // Doing this here instead of in the skins to
 549                                 // ensure that the div has the same ID in all
 550                                 // skins
 551                                 $data = "<div id='mw-data-after-content'>\n" .
 552                                         "\t$data\n" .
 553                                         "</div>\n";
 554                         }
 555                 } else {
 556                         wfDebug( "Hook SkinAfterContent changed output processing.\n" );
 557                 }
 558
 559                 return $data;
 560         }
 561
 562         /**
 563          * Generate debug data HTML for displaying at the bottom of the main content
 564          * area.
 565          * @return String HTML containing debug data, if enabled (otherwise empty).
 566          */
 567         protected function generateDebugHTML() {
 568                 return MWDebug::getHTMLDebugLog();
 569         }
 570
 571         /**
 572          * This gets called shortly before the "</body>" tag.
 573          *
 574          * @return String HTML-wrapped JS code to be put before "</body>"
 575          */
 576         function bottomScripts() {
 577                 // TODO and the suckage continues. This function is really just a wrapper around
 578                 // OutputPage::getBottomScripts() which takes a Skin param. This should be cleaned
 579                 // up at some point
 580                 $bottomScriptText = $this->getOutput()->getBottomScripts();
 581                 wfRunHooks( 'SkinAfterBottomScripts', array( $this, &$bottomScriptText ) );
 582
 583                 return $bottomScriptText;
 584         }
 585
 586         /**
 587          * Text with the permalink to the source page,
 588          * usually shown on the footer of a printed page
 589          *
 590          * @return string HTML text with an URL
 591          */
 592         function printSource() {
 593                 $oldid = $this->getRevisionId();
 594                 if ( $oldid ) {
 595                         $url = htmlspecialchars( wfExpandIRI( $this->getTitle()->getCanonicalURL( 'oldid=' . $oldid ) ) );
 596                 } else {
 597                         // oldid not available for non existing pages
 598                         $url = htmlspecialchars( wfExpandIRI( $this->getTitle()->getCanonicalURL() ) );
 599                 }
 600                 return $this->msg( 'retrievedfrom', '<a href="' . $url . '">' . $url . '</a>' )->text();
 601         }
 602
 603         /**
 604          * @return String
 605          */
 606         function getUndeleteLink() {
 607                 $action = $this->getRequest()->getVal( 'action', 'view' );
 608
 609                 if ( $this->getUser()->isAllowed( 'deletedhistory' ) &&
 610                         ( $this->getTitle()->getArticleID() == 0 || $action == 'history' ) ) {
 611                         $n = $this->getTitle()->isDeleted();
 612
 613                         if ( $n ) {
 614                                 if ( $this->getUser()->isAllowed( 'undelete' ) ) {
 615                                         $msg = 'thisisdeleted';
 616                                 } else {
 617                                         $msg = 'viewdeleted';
 618                                 }
 619
 620                                 return $this->msg( $msg )->rawParams(
 621                                         Linker::linkKnown(
 622                                                 SpecialPage::getTitleFor( 'Undelete', $this->getTitle()->getPrefixedDBkey() ),
 623                                                 $this->msg( 'restorelink' )->numParams( $n )->escaped() )
 624                                         )->text();
 625                         }
 626                 }
 627
 628                 return '';
 629         }
 630
 631         /**
 632          * @return string
 633          */
 634         function subPageSubtitle() {
 635                 global $wgLang;
 636                 $out = $this->getOutput();
 637                 $subpages = '';
 638
 639                 if ( !wfRunHooks( 'SkinSubPageSubtitle', array( &$subpages, $this, $out ) ) ) {
 640                         return $subpages;
 641                 }
 642
 643                 if ( $out->isArticle() && MWNamespace::hasSubpages( $out->getTitle()->getNamespace() ) ) {
 644                         $ptext = $this->getTitle()->getPrefixedText();
 645                         if ( preg_match( '/\//', $ptext ) ) {
 646                                 $links = explode( '/', $ptext );
 647                                 array_pop( $links );
 648                                 $c = 0;
 649                                 $growinglink = '';
 650                                 $display = '';
 651
 652                                 foreach ( $links as $link ) {
 653                                         $growinglink .= $link;
 654                                         $display .= $link;
 655                                         $linkObj = Title::newFromText( $growinglink );
 656
 657                                         if ( is_object( $linkObj ) && $linkObj->isKnown() ) {
 658                                                 $getlink = Linker::linkKnown(
 659                                                         $linkObj,
 660                                                         htmlspecialchars( $display )
 661                                                 );
 662
 663                                                 $c++;
 664
 665                                                 if ( $c > 1 ) {
 666                                                         $subpages .= $wgLang->getDirMarkEntity() . $this->msg( 'pipe-separator' )->escaped();
 667                                                 } else {
 668                                                         $subpages .= '&lt; ';
 669                                                 }
 670
 671                                                 $subpages .= $getlink;
 672                                                 $display = '';
 673                                         } else {
 674                                                 $display .= '/';
 675                                         }
 676                                         $growinglink .= '/';
 677                                 }
 678                         }
 679                 }
 680
 681                 return $subpages;
 682         }
 683
 684         /**
 685          * Returns true if the IP should be shown in the header
 686          * @return Bool
 687          */
 688         function showIPinHeader() {
 689                 global $wgShowIPinHeader;
 690                 return $wgShowIPinHeader && session_id() != '';
 691         }
 692
 693         /**
 694          * @return String
 695          */
 696         function getSearchLink() {
 697                 $searchPage = SpecialPage::getTitleFor( 'Search' );
 698                 return $searchPage->getLocalURL();
 699         }
 700
 701         /**
 702          * @return string
 703          */
 704         function escapeSearchLink() {
 705                 return htmlspecialchars( $this->getSearchLink() );
 706         }
 707
 708         /**
 709          * @param $type string
 710          * @return string
 711          */
 712         function getCopyright( $type = 'detect' ) {
 713                 global $wgRightsPage, $wgRightsUrl, $wgRightsText, $wgContLang;
 714
 715                 if ( $type == 'detect' ) {
 716                         if ( !$this->isRevisionCurrent() && !$this->msg( 'history_copyright' )->inContentLanguage()->isDisabled() ) {
 717                                 $type = 'history';
 718                         } else {
 719                                 $type = 'normal';
 720                         }
 721                 }
 722
 723                 if ( $type == 'history' ) {
 724                         $msg = 'history_copyright';
 725                 } else {
 726                         $msg = 'copyright';
 727                 }
 728
 729                 if ( $wgRightsPage ) {
 730                         $title = Title::newFromText( $wgRightsPage );
 731                         $link = Linker::linkKnown( $title, $wgRightsText );
 732                 } elseif ( $wgRightsUrl ) {
 733                         $link = Linker::makeExternalLink( $wgRightsUrl, $wgRightsText );
 734                 } elseif ( $wgRightsText ) {
 735                         $link = $wgRightsText;
 736                 } else {
 737                         # Give up now
 738                         return '';
 739                 }
 740
 741                 // Allow for site and per-namespace customization of copyright notice.
 742                 $forContent = true;
 743
 744                 wfRunHooks( 'SkinCopyrightFooter', array( $this->getTitle(), $type, &$msg, &$link, &$forContent ) );
 745
 746                 $msgObj = $this->msg( $msg )->rawParams( $link );
 747                 if ( $forContent ) {
 748                         $msg = $msgObj->inContentLanguage()->text();
 749                         if ( $this->getLanguage()->getCode() !== $wgContLang->getCode() ) {
 750                                 $msg = Html::rawElement( 'span', array( 'lang' => $wgContLang->getHtmlCode(), 'dir' => $wgContLang->getDir() ), $msg );
 751                         }
 752                         return $msg;
 753                 } else {
 754                         return $msgObj->text();
 755                 }
 756         }
 757
 758         /**
 759          * @return null|string
 760          */
 761         function getCopyrightIcon() {
 762                 global $wgRightsUrl, $wgRightsText, $wgRightsIcon, $wgCopyrightIcon;
 763
 764                 $out = '';
 765
 766                 if ( isset( $wgCopyrightIcon ) && $wgCopyrightIcon ) {
 767                         $out = $wgCopyrightIcon;
 768                 } elseif ( $wgRightsIcon ) {
 769                         $icon = htmlspecialchars( $wgRightsIcon );
 770
 771                         if ( $wgRightsUrl ) {
 772                                 $url = htmlspecialchars( $wgRightsUrl );
 773                                 $out .= '<a href="' . $url . '">';
 774                         }
 775
 776                         $text = htmlspecialchars( $wgRightsText );
 777                         $out .= "<img src=\"$icon\" alt=\"$text\" width=\"88\" height=\"31\" />";
 778
 779                         if ( $wgRightsUrl ) {
 780                                 $out .= '</a>';
 781                         }
 782                 }
 783
 784                 return $out;
 785         }
 786
 787         /**
 788          * Gets the powered by MediaWiki icon.
 789          * @return string
 790          */
 791         function getPoweredBy() {
 792                 global $wgStylePath;
 793
 794                 $url = htmlspecialchars( "$wgStylePath/common/images/poweredby_mediawiki_88x31.png" );
 795                 $text = '<a href="//www.mediawiki.org/"><img src="' . $url . '" height="31" width="88" alt="Powered by MediaWiki" /></a>';
 796                 wfRunHooks( 'SkinGetPoweredBy', array( &$text, $this ) );
 797                 return $text;
 798         }
 799
 800         /**
 801          * Get the timestamp of the latest revision, formatted in user language
 802          *
 803          * @return String
 804          */
 805         protected function lastModified() {
 806                 $timestamp = $this->getOutput()->getRevisionTimestamp();
 807
 808                 # No cached timestamp, load it from the database
 809                 if ( $timestamp === null ) {
 810                         $timestamp = Revision::getTimestampFromId( $this->getTitle(), $this->getRevisionId() );
 811                 }
 812
 813                 if ( $timestamp ) {
 814                         $d = $this->getLanguage()->userDate( $timestamp, $this->getUser() );
 815                         $t = $this->getLanguage()->userTime( $timestamp, $this->getUser() );
 816                         $s = ' ' . $this->msg( 'lastmodifiedat', $d, $t )->text();
 817                 } else {
 818                         $s = '';
 819                 }
 820
 821                 if ( wfGetLB()->getLaggedSlaveMode() ) {
 822                         $s .= ' <strong>' . $this->msg( 'laggedslavemode' )->text() . '</strong>';
 823                 }
 824
 825                 return $s;
 826         }
 827
 828         /**
 829          * @param $align string
 830          * @return string
 831          */
 832         function logoText( $align = '' ) {
 833                 if ( $align != '' ) {
 834                         $a = " style='float: {$align};'";
 835                 } else {
 836                         $a = '';
 837                 }
 838
 839                 $mp = $this->msg( 'mainpage' )->escaped();
 840                 $mptitle = Title::newMainPage();
 841                 $url = ( is_object( $mptitle ) ? htmlspecialchars( $mptitle->getLocalURL() ) : '' );
 842
 843                 $logourl = $this->getLogo();
 844                 $s = "<a href='{$url}'><img{$a} src='{$logourl}' alt='[{$mp}]' /></a>";
 845
 846                 return $s;
 847         }
 848
 849         /**
 850          * Renders a $wgFooterIcons icon according to the method's arguments
 851          * @param array $icon The icon to build the html for, see $wgFooterIcons for the format of this array
 852          * @param bool|String $withImage Whether to use the icon's image or output a text-only footericon
 853          * @return String HTML
 854          */
 855         function makeFooterIcon( $icon, $withImage = 'withImage' ) {
 856                 if ( is_string( $icon ) ) {
 857                         $html = $icon;
 858                 } else { // Assuming array
 859                         $url = isset( $icon["url"] ) ? $icon["url"] : null;
 860                         unset( $icon["url"] );
 861                         if ( isset( $icon["src"] ) && $withImage === 'withImage' ) {
 862                                 $html = Html::element( 'img', $icon ); // do this the lazy way, just pass icon data as an attribute array
 863                         } else {
 864                                 $html = htmlspecialchars( $icon["alt"] );
 865                         }
 866                         if ( $url ) {
 867                                 $html = Html::rawElement( 'a', array( "href" => $url ), $html );
 868                         }
 869                 }
 870                 return $html;
 871         }
 872
 873         /**
 874          * Gets the link to the wiki's main page.
 875          * @return string
 876          */
 877         function mainPageLink() {
 878                 $s = Linker::linkKnown(
 879                         Title::newMainPage(),
 880                         $this->msg( 'mainpage' )->escaped()
 881                 );
 882
 883                 return $s;
 884         }
 885
 886         /**
 887          * @param $desc
 888          * @param $page
 889          * @return string
 890          */
 891         public function footerLink( $desc, $page ) {
 892                 // if the link description has been set to "-" in the default language,
 893                 if ( $this->msg( $desc )->inContentLanguage()->isDisabled() ) {
 894                         // then it is disabled, for all languages.
 895                         return '';
 896                 } else {
 897                         // Otherwise, we display the link for the user, described in their
 898                         // language (which may or may not be the same as the default language),
 899                         // but we make the link target be the one site-wide page.
 900                         $title = Title::newFromText( $this->msg( $page )->inContentLanguage()->text() );
 901
 902                         return Linker::linkKnown(
 903                                 $title,
 904                                 $this->msg( $desc )->escaped()
 905                         );
 906                 }
 907         }
 908
 909         /**
 910          * Gets the link to the wiki's privacy policy page.
 911          * @return String HTML
 912          */
 913         function privacyLink() {
 914                 return $this->footerLink( 'privacy', 'privacypage' );
 915         }
 916
 917         /**
 918          * Gets the link to the wiki's about page.
 919          * @return String HTML
 920          */
 921         function aboutLink() {
 922                 return $this->footerLink( 'aboutsite', 'aboutpage' );
 923         }
 924
 925         /**
 926          * Gets the link to the wiki's general disclaimers page.
 927          * @return String HTML
 928          */
 929         function disclaimerLink() {
 930                 return $this->footerLink( 'disclaimers', 'disclaimerpage' );
 931         }
 932
 933         /**
 934          * Return URL options for the 'edit page' link.
 935          * This may include an 'oldid' specifier, if the current page view is such.
 936          *
 937          * @return array
 938          * @private
 939          */
 940         function editUrlOptions() {
 941                 $options = array( 'action' => 'edit' );
 942
 943                 if ( !$this->isRevisionCurrent() ) {
 944                         $options['oldid'] = intval( $this->getRevisionId() );
 945                 }
 946
 947                 return $options;
 948         }
 949
 950         /**
 951          * @param $id User|int
 952          * @return bool
 953          */
 954         function showEmailUser( $id ) {
 955                 if ( $id instanceof User ) {
 956                         $targetUser = $id;
 957                 } else {
 958                         $targetUser = User::newFromId( $id );
 959                 }
 960                 return $this->getUser()->canSendEmail() && # the sending user must have a confirmed email address
 961                         $targetUser->canReceiveEmail(); # the target user must have a confirmed email address and allow emails from users
 962         }
 963
 964         /**
 965          * Return a fully resolved style path url to images or styles stored in the common folder.
 966          * This method returns a url resolved using the configured skin style path
 967          * and includes the style version inside of the url.
 968          * @param string $name The name or path of a skin resource file
 969          * @return String The fully resolved style path url including styleversion
 970          */
 971         function getCommonStylePath( $name ) {
 972                 global $wgStylePath, $wgStyleVersion;
 973                 return "$wgStylePath/common/$name?$wgStyleVersion";
 974         }
 975
 976         /**
 977          * Return a fully resolved style path url to images or styles stored in the current skins's folder.
 978          * This method returns a url resolved using the configured skin style path
 979          * and includes the style version inside of the url.
 980          * @param string $name The name or path of a skin resource file
 981          * @return String The fully resolved style path url including styleversion
 982          */
 983         function getSkinStylePath( $name ) {
 984                 global $wgStylePath, $wgStyleVersion;
 985                 return "$wgStylePath/{$this->stylename}/$name?$wgStyleVersion";
 986         }
 987
 988         /* these are used extensively in SkinTemplate, but also some other places */
 989
 990         /**
 991          * @param $urlaction string
 992          * @return String
 993          */
 994         static function makeMainPageUrl( $urlaction = '' ) {
 995                 $title = Title::newMainPage();
 996                 self::checkTitle( $title, '' );
 997
 998                 return $title->getLocalURL( $urlaction );
 999         }
1000
1001         /**
1002          * Make a URL for a Special Page using the given query and protocol.
1003          *
1004          * If $proto is set to null, make a local URL. Otherwise, make a full
1005          * URL with the protocol specified.
1006          *
1007          * @param string $name Name of the Special page
1008          * @param string $urlaction Query to append
1009          * @param $proto Protocol to use or null for a local URL
1010          * @return String
1011          */
1012         static function makeSpecialUrl( $name, $urlaction = '', $proto = null ) {
1013                 $title = SpecialPage::getSafeTitleFor( $name );
1014                 if ( is_null( $proto ) ) {
1015                         return $title->getLocalURL( $urlaction );
1016                 } else {
1017                         return $title->getFullURL( $urlaction, false, $proto );
1018                 }
1019         }
1020
1021         /**
1022          * @param $name string
1023          * @param $subpage string
1024          * @param $urlaction string
1025          * @return String
1026          */
1027         static function makeSpecialUrlSubpage( $name, $subpage, $urlaction = '' ) {
1028                 $title = SpecialPage::getSafeTitleFor( $name, $subpage );
1029                 return $title->getLocalURL( $urlaction );
1030         }
1031
1032         /**
1033          * @param $name string
1034          * @param $urlaction string
1035          * @return String
1036          */
1037         static function makeI18nUrl( $name, $urlaction = '' ) {
1038                 $title = Title::newFromText( wfMessage( $name )->inContentLanguage()->text() );
1039                 self::checkTitle( $title, $name );
1040                 return $title->getLocalURL( $urlaction );
1041         }
1042
1043         /**
1044          * @param $name string
1045          * @param $urlaction string
1046          * @return String
1047          */
1048         static function makeUrl( $name, $urlaction = '' ) {
1049                 $title = Title::newFromText( $name );
1050                 self::checkTitle( $title, $name );
1051
1052                 return $title->getLocalURL( $urlaction );
1053         }
1054
1055         /**
1056          * If url string starts with http, consider as external URL, else
1057          * internal
1058          * @param $name String
1059          * @return String URL
1060          */
1061         static function makeInternalOrExternalUrl( $name ) {
1062                 if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $name ) ) {
1063                         return $name;
1064                 } else {
1065                         return self::makeUrl( $name );
1066                 }
1067         }
1068
1069         /**
1070          * this can be passed the NS number as defined in Language.php
1071          * @param $name
1072          * @param $urlaction string
1073          * @param $namespace int
1074          * @return String
1075          */
1076         static function makeNSUrl( $name, $urlaction = '', $namespace = NS_MAIN ) {
1077                 $title = Title::makeTitleSafe( $namespace, $name );
1078                 self::checkTitle( $title, $name );
1079
1080                 return $title->getLocalURL( $urlaction );
1081         }
1082
1083         /**
1084          * these return an array with the 'href' and boolean 'exists'
1085          * @param $name
1086          * @param $urlaction string
1087          * @return array
1088          */
1089         static function makeUrlDetails( $name, $urlaction = '' ) {
1090                 $title = Title::newFromText( $name );
1091                 self::checkTitle( $title, $name );
1092
1093                 return array(
1094                         'href' => $title->getLocalURL( $urlaction ),
1095                         'exists' => $title->getArticleID() != 0,
1096                 );
1097         }
1098
1099         /**
1100          * Make URL details where the article exists (or at least it's convenient to think so)
1101          * @param string $name Article name
1102          * @param $urlaction String
1103          * @return Array
1104          */
1105         static function makeKnownUrlDetails( $name, $urlaction = '' ) {
1106                 $title = Title::newFromText( $name );
1107                 self::checkTitle( $title, $name );
1108
1109                 return array(
1110                         'href' => $title->getLocalURL( $urlaction ),
1111                         'exists' => true
1112                 );
1113         }
1114
1115         /**
1116          * make sure we have some title to operate on
1117          *
1118          * @param $title Title
1119          * @param $name string
1120          */
1121         static function checkTitle( &$title, $name ) {
1122                 if ( !is_object( $title ) ) {
1123                         $title = Title::newFromText( $name );
1124                         if ( !is_object( $title ) ) {
1125                                 $title = Title::newFromText( '--error: link target missing--' );
1126                         }
1127                 }
1128         }
1129
1130         /**
1131          * Build an array that represents the sidebar(s), the navigation bar among them.
1132          *
1133          * BaseTemplate::getSidebar can be used to simplify the format and id generation in new skins.
1134          *
1135          * The format of the returned array is array( heading => content, ... ), where:
1136          * - heading is the heading of a navigation portlet. It is either:
1137          *   - magic string to be handled by the skins ('SEARCH' / 'LANGUAGES' / 'TOOLBOX' / ...)
1138          *   - a message name (e.g. 'navigation'), the message should be HTML-escaped by the skin
1139          *   - plain text, which should be HTML-escaped by the skin
1140          * - content is the contents of the portlet. It is either:
1141          *   - HTML text (<ul><li>...</li>...</ul>)
1142          *   - array of link data in a format accepted by BaseTemplate::makeListItem()
1143          *   - (for a magic string as a key, any value)
1144          *
1145          * Note that extensions can control the sidebar contents using the SkinBuildSidebar hook
1146          * and can technically insert anything in here; skin creators are expected to handle
1147          * values described above.
1148          *
1149          * @return array
1150          */
1151         function buildSidebar() {
1152                 global $wgMemc, $wgEnableSidebarCache, $wgSidebarCacheExpiry;
1153                 wfProfileIn( __METHOD__ );
1154
1155                 $key = wfMemcKey( 'sidebar', $this->getLanguage()->getCode() );
1156
1157                 if ( $wgEnableSidebarCache ) {
1158                         $cachedsidebar = $wgMemc->get( $key );
1159                         if ( $cachedsidebar ) {
1160                                 wfProfileOut( __METHOD__ );
1161                                 return $cachedsidebar;
1162                         }
1163                 }
1164
1165                 $bar = array();
1166                 $this->addToSidebar( $bar, 'sidebar' );
1167
1168                 wfRunHooks( 'SkinBuildSidebar', array( $this, &$bar ) );
1169                 if ( $wgEnableSidebarCache ) {
1170                         $wgMemc->set( $key, $bar, $wgSidebarCacheExpiry );
1171                 }
1172
1173                 wfProfileOut( __METHOD__ );
1174                 return $bar;
1175         }
1176         /**
1177          * Add content from a sidebar system message
1178          * Currently only used for MediaWiki:Sidebar (but may be used by Extensions)
1179          *
1180          * This is just a wrapper around addToSidebarPlain() for backwards compatibility
1181          *
1182          * @param $bar array
1183          * @param $message String
1184          */
1185         function addToSidebar( &$bar, $message ) {
1186                 $this->addToSidebarPlain( $bar, wfMessage( $message )->inContentLanguage()->plain() );
1187         }
1188
1189         /**
1190          * Add content from plain text
1191          * @since 1.17
1192          * @param $bar array
1193          * @param $text string
1194          * @return Array
1195          */
1196         function addToSidebarPlain( &$bar, $text ) {
1197                 $lines = explode( "\n", $text );
1198
1199                 $heading = '';
1200
1201                 foreach ( $lines as $line ) {
1202                         if ( strpos( $line, '*' ) !== 0 ) {
1203                                 continue;
1204                         }
1205                         $line = rtrim( $line, "\r" ); // for Windows compat
1206
1207                         if ( strpos( $line, '**' ) !== 0 ) {
1208                                 $heading = trim( $line, '* ' );
1209                                 if ( !array_key_exists( $heading, $bar ) ) {
1210                                         $bar[$heading] = array();
1211                                 }
1212                         } else {
1213                                 $line = trim( $line, '* ' );
1214
1215                                 if ( strpos( $line, '|' ) !== false ) { // sanity check
1216                                         $line = MessageCache::singleton()->transform( $line, false, null, $this->getTitle() );
1217                                         $line = array_map( 'trim', explode( '|', $line, 2 ) );
1218                                         if ( count( $line ) !== 2 ) {
1219                                                 // Second sanity check, could be hit by people doing
1220                                                 // funky stuff with parserfuncs... (bug 33321)
1221                                                 continue;
1222                                         }
1223
1224                                         $extraAttribs = array();
1225
1226                                         $msgLink = $this->msg( $line[0] )->inContentLanguage();
1227                                         if ( $msgLink->exists() ) {
1228                                                 $link = $msgLink->text();
1229                                                 if ( $link == '-' ) {
1230                                                         continue;
1231                                                 }
1232                                         } else {
1233                                                 $link = $line[0];
1234                                         }
1235                                         $msgText = $this->msg( $line[1] );
1236                                         if ( $msgText->exists() ) {
1237                                                 $text = $msgText->text();
1238                                         } else {
1239                                                 $text = $line[1];
1240                                         }
1241
1242                                         if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $link ) ) {
1243                                                 $href = $link;
1244
1245                                                 // Parser::getExternalLinkAttribs won't work here because of the Namespace things
1246                                                 global $wgNoFollowLinks, $wgNoFollowDomainExceptions;
1247                                                 if ( $wgNoFollowLinks && !wfMatchesDomainList( $href, $wgNoFollowDomainExceptions ) ) {
1248                                                         $extraAttribs['rel'] = 'nofollow';
1249                                                 }
1250
1251                                                 global $wgExternalLinkTarget;
1252                                                 if ( $wgExternalLinkTarget ) {
1253                                                         $extraAttribs['target'] = $wgExternalLinkTarget;
1254                                                 }
1255                                         } else {
1256                                                 $title = Title::newFromText( $link );
1257
1258                                                 if ( $title ) {
1259                                                         $title = $title->fixSpecialName();
1260                                                         $href = $title->getLinkURL();
1261                                                 } else {
1262                                                         $href = 'INVALID-TITLE';
1263                                                 }
1264                                         }
1265
1266                                         $bar[$heading][] = array_merge( array(
1267                                                 'text' => $text,
1268                                                 'href' => $href,
1269                                                 'id' => 'n-' . Sanitizer::escapeId( strtr( $line[1], ' ', '-' ), 'noninitial' ),
1270                                                 'active' => false
1271                                         ), $extraAttribs );
1272                                 } else {
1273                                         continue;
1274                                 }
1275                         }
1276                 }
1277
1278                 return $bar;
1279         }
1280
1281         /**
1282          * Should we load mediawiki.legacy.wikiprintable?  Skins that have their own
1283          * print stylesheet should override this and return false.  (This is an
1284          * ugly hack to get Monobook to play nicely with OutputPage::headElement().)
1285          *
1286          * @return bool
1287          */
1288         public function commonPrintStylesheet() {
1289                 return true;
1290         }
1291
1292         /**
1293          * Gets new talk page messages for the current user and returns an
1294          * appropriate alert message (or an empty string if there are no messages)
1295          * @return String
1296          */
1297         function getNewtalks() {
1298
1299                 $newMessagesAlert = '';
1300                 $user = $this->getUser();
1301                 $newtalks = $user->getNewMessageLinks();
1302                 $out = $this->getOutput();
1303
1304                 // Allow extensions to disable or modify the new messages alert
1305                 if ( !wfRunHooks( 'GetNewMessagesAlert', array( &$newMessagesAlert, $newtalks, $user, $out ) ) ) {
1306                         return '';
1307                 }
1308                 if ( $newMessagesAlert ) {
1309                         return $newMessagesAlert;
1310                 }
1311
1312                 if ( count( $newtalks ) == 1 && $newtalks[0]['wiki'] === wfWikiID() ) {
1313                         $uTalkTitle = $user->getTalkPage();
1314
1315                         if ( !$uTalkTitle->equals( $out->getTitle() ) ) {
1316                                 $lastSeenRev = isset( $newtalks[0]['rev'] ) ? $newtalks[0]['rev'] : null;
1317                                 $nofAuthors = 0;
1318                                 if ( $lastSeenRev !== null ) {
1319                                         $plural = true; // Default if we have a last seen revision: if unknown, use plural
1320                                         $latestRev = Revision::newFromTitle( $uTalkTitle, false, Revision::READ_NORMAL );
1321                                         if ( $latestRev !== null ) {
1322                                                 // Singular if only 1 unseen revision, plural if several unseen revisions.
1323                                                 $plural = $latestRev->getParentId() !== $lastSeenRev->getId();
1324                                                 $nofAuthors = $uTalkTitle->countAuthorsBetween(
1325                                                         $lastSeenRev, $latestRev, 10, 'include_new' );
1326                                         }
1327                                 } else {
1328                                         // Singular if no revision -> diff link will show latest change only in any case
1329                                         $plural = false;
1330                                 }
1331                                 $plural = $plural ? 2 : 1;
1332                                 // 2 signifies "more than one revision". We don't know how many, and even if we did,
1333                                 // the number of revisions or authors is not necessarily the same as the number of
1334                                 // "messages".
1335                                 $newMessagesLink = Linker::linkKnown(
1336                                         $uTalkTitle,
1337                                         $this->msg( 'newmessageslinkplural' )->params( $plural )->escaped(),
1338                                         array(),
1339                                         array( 'redirect' => 'no' )
1340                                 );
1341
1342                                 $newMessagesDiffLink = Linker::linkKnown(
1343                                         $uTalkTitle,
1344                                         $this->msg( 'newmessagesdifflinkplural' )->params( $plural )->escaped(),
1345                                         array(),
1346                                         $lastSeenRev !== null
1347                                                 ? array( 'oldid' => $lastSeenRev->getId(), 'diff' => 'cur' )
1348                                                 : array( 'diff' => 'cur' )
1349                                 );
1350
1351                                 if ( $nofAuthors >= 1 && $nofAuthors <= 10 ) {
1352                                         $newMessagesAlert = $this->msg(
1353                                                 'youhavenewmessagesfromusers',
1354                                                 $newMessagesLink,
1355                                                 $newMessagesDiffLink
1356                                         )->numParams( $nofAuthors );
1357                                 } else {
1358                                         // $nofAuthors === 11 signifies "11 or more" ("more than 10")
1359                                         $newMessagesAlert = $this->msg(
1360                                                 $nofAuthors > 10 ? 'youhavenewmessagesmanyusers' : 'youhavenewmessages',
1361                                                 $newMessagesLink,
1362                                                 $newMessagesDiffLink
1363                                         );
1364                                 }
1365                                 $newMessagesAlert = $newMessagesAlert->text();
1366                                 # Disable Squid cache
1367                                 $out->setSquidMaxage( 0 );
1368                         }
1369                 } elseif ( count( $newtalks ) ) {
1370                         $sep = $this->msg( 'newtalkseparator' )->escaped();
1371                         $msgs = array();
1372
1373                         foreach ( $newtalks as $newtalk ) {
1374                                 $msgs[] = Xml::element(
1375                                         'a',
1376                                         array( 'href' => $newtalk['link'] ), $newtalk['wiki']
1377                                 );
1378                         }
1379                         $parts = implode( $sep, $msgs );
1380                         $newMessagesAlert = $this->msg( 'youhavenewmessagesmulti' )->rawParams( $parts )->escaped();
1381                         $out->setSquidMaxage( 0 );
1382                 }
1383
1384                 return $newMessagesAlert;
1385         }
1386
1387         /**
1388          * Get a cached notice
1389          *
1390          * @param string $name message name, or 'default' for $wgSiteNotice
1391          * @return String: HTML fragment
1392          */
1393         private function getCachedNotice( $name ) {
1394                 global $wgRenderHashAppend, $parserMemc, $wgContLang;
1395
1396                 wfProfileIn( __METHOD__ );
1397
1398                 $needParse = false;
1399
1400                 if ( $name === 'default' ) {
1401                         // special case
1402                         global $wgSiteNotice;
1403                         $notice = $wgSiteNotice;
1404                         if ( empty( $notice ) ) {
1405                                 wfProfileOut( __METHOD__ );
1406                                 return false;
1407                         }
1408                 } else {
1409                         $msg = $this->msg( $name )->inContentLanguage();
1410                         if ( $msg->isDisabled() ) {
1411                                 wfProfileOut( __METHOD__ );
1412                                 return false;
1413                         }
1414                         $notice = $msg->plain();
1415                 }
1416
1417                 // Use the extra hash appender to let eg SSL variants separately cache.
1418                 $key = wfMemcKey( $name . $wgRenderHashAppend );
1419                 $cachedNotice = $parserMemc->get( $key );
1420                 if ( is_array( $cachedNotice ) ) {
1421                         if ( md5( $notice ) == $cachedNotice['hash'] ) {
1422                                 $notice = $cachedNotice['html'];
1423                         } else {
1424                                 $needParse = true;
1425                         }
1426                 } else {
1427                         $needParse = true;
1428                 }
1429
1430                 if ( $needParse ) {
1431                         $parsed = $this->getOutput()->parse( $notice );
1432                         $parserMemc->set( $key, array( 'html' => $parsed, 'hash' => md5( $notice ) ), 600 );
1433                         $notice = $parsed;
1434                 }
1435
1436                 $notice = Html::rawElement( 'div', array( 'id' => 'localNotice',
1437                         'lang' => $wgContLang->getHtmlCode(), 'dir' => $wgContLang->getDir() ), $notice );
1438                 wfProfileOut( __METHOD__ );
1439                 return $notice;
1440         }
1441
1442         /**
1443          * Get a notice based on page's namespace
1444          *
1445          * @return String: HTML fragment
1446          */
1447         function getNamespaceNotice() {
1448                 wfProfileIn( __METHOD__ );
1449
1450                 $key = 'namespacenotice-' . $this->getTitle()->getNsText();
1451                 $namespaceNotice = $this->getCachedNotice( $key );
1452                 if ( $namespaceNotice && substr( $namespaceNotice, 0, 7 ) != '<p>&lt;' ) {
1453                         $namespaceNotice = '<div id="namespacebanner">' . $namespaceNotice . '</div>';
1454                 } else {
1455                         $namespaceNotice = '';
1456                 }
1457
1458                 wfProfileOut( __METHOD__ );
1459                 return $namespaceNotice;
1460         }
1461
1462         /**
1463          * Get the site notice
1464          *
1465          * @return String: HTML fragment
1466          */
1467         function getSiteNotice() {
1468                 wfProfileIn( __METHOD__ );
1469                 $siteNotice = '';
1470
1471                 if ( wfRunHooks( 'SiteNoticeBefore', array( &$siteNotice, $this ) ) ) {
1472                         if ( is_object( $this->getUser() ) && $this->getUser()->isLoggedIn() ) {
1473                                 $siteNotice = $this->getCachedNotice( 'sitenotice' );
1474                         } else {
1475                                 $anonNotice = $this->getCachedNotice( 'anonnotice' );
1476                                 if ( !$anonNotice ) {
1477                                         $siteNotice = $this->getCachedNotice( 'sitenotice' );
1478                                 } else {
1479                                         $siteNotice = $anonNotice;
1480                                 }
1481                         }
1482                         if ( !$siteNotice ) {
1483                                 $siteNotice = $this->getCachedNotice( 'default' );
1484                         }
1485                 }
1486
1487                 wfRunHooks( 'SiteNoticeAfter', array( &$siteNotice, $this ) );
1488                 wfProfileOut( __METHOD__ );
1489                 return $siteNotice;
1490         }
1491
1492         /**
1493          * Create a section edit link.  This supersedes editSectionLink() and
1494          * editSectionLinkForOther().
1495          *
1496          * @param $nt      Title  The title being linked to (may not be the same as
1497          *   $wgTitle, if the section is included from a template)
1498          * @param string $section The designation of the section being pointed to,
1499          *   to be included in the link, like "&section=$section"
1500          * @param string $tooltip The tooltip to use for the link: will be escaped
1501          *   and wrapped in the 'editsectionhint' message
1502          * @param $lang    string Language code
1503          * @return         string HTML to use for edit link
1504          */
1505         public function doEditSectionLink( Title $nt, $section, $tooltip = null, $lang = false ) {
1506                 // HTML generated here should probably have userlangattributes
1507                 // added to it for LTR text on RTL pages
1508
1509                 $lang = wfGetLangObj( $lang );
1510
1511                 $attribs = array();
1512                 if ( !is_null( $tooltip ) ) {
1513                         # Bug 25462: undo double-escaping.
1514                         $tooltip = Sanitizer::decodeCharReferences( $tooltip );
1515                         $attribs['title'] = wfMessage( 'editsectionhint' )->rawParams( $tooltip )
1516                                 ->inLanguage( $lang )->text();
1517                 }
1518                 $link = Linker::link( $nt, wfMessage( 'editsection' )->inLanguage( $lang )->text(),
1519                         $attribs,
1520                         array( 'action' => 'edit', 'section' => $section ),
1521                         array( 'noclasses', 'known' )
1522                 );
1523
1524                 # Run the old hook.  This takes up half of the function . . . hopefully
1525                 # we can rid of it someday.
1526                 $attribs = '';
1527                 if ( $tooltip ) {
1528                         $attribs = wfMessage( 'editsectionhint' )->rawParams( $tooltip )
1529                                 ->inLanguage( $lang )->escaped();
1530                         $attribs = " title=\"$attribs\"";
1531                 }
1532                 $result = null;
1533                 wfRunHooks( 'EditSectionLink', array( &$this, $nt, $section, $attribs, $link, &$result, $lang ) );
1534                 if ( !is_null( $result ) ) {
1535                         # For reverse compatibility, add the brackets *after* the hook is
1536                         # run, and even add them to hook-provided text.  (This is the main
1537                         # reason that the EditSectionLink hook is deprecated in favor of
1538                         # DoEditSectionLink: it can't change the brackets or the span.)
1539                         $result = wfMessage( 'editsection-brackets' )->rawParams( $result )
1540                                 ->inLanguage( $lang )->escaped();
1541                         return "<span class=\"mw-editsection\">$result</span>";
1542                 }
1543
1544                 # Add the brackets and the span, and *then* run the nice new hook, with
1545                 # clean and non-redundant arguments.
1546                 $result = wfMessage( 'editsection-brackets' )->rawParams( $link )
1547                         ->inLanguage( $lang )->escaped();
1548                 $result = "<span class=\"mw-editsection\">$result</span>";
1549
1550                 wfRunHooks( 'DoEditSectionLink', array( $this, $nt, $section, $tooltip, &$result, $lang ) );
1551                 return $result;
1552         }
1553
1554         /**
1555          * Use PHP's magic __call handler to intercept legacy calls to the linker
1556          * for backwards compatibility.
1557          *
1558          * @param string $fname Name of called method
1559          * @param array $args Arguments to the method
1560          * @throws MWException
1561          * @return mixed
1562          */
1563         function __call( $fname, $args ) {
1564                 $realFunction = array( 'Linker', $fname );
1565                 if ( is_callable( $realFunction ) ) {
1566                         wfDeprecated( get_class( $this ) . '::' . $fname, '1.21' );
1567                         return call_user_func_array( $realFunction, $args );
1568                 } else {
1569                         $className = get_class( $this );
1570                         throw new MWException( "Call to undefined method $className::$fname" );
1571                 }
1572         }
1573
1574 }