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  *
  30  * See docs/skin.txt for more information.
  31  *
  32  * @ingroup Skins
  33  */
  34 abstract class Skin extends ContextSource {
  35         protected $skinname = null;
  36         protected $mRelevantTitle = null;
  37         protected $mRelevantUser = null;
  38
  39         /**
  40          * Fetch the set of available skins.
  41          * @return array Associative array of strings
  42          */
  43         static function getSkinNames() {
  44                 global $wgValidSkinNames;
  45                 static $skinsInitialised = false;
  46
  47                 if ( !$skinsInitialised || !count( $wgValidSkinNames ) ) {
  48                         # Get a list of available skins
  49                         # Build using the regular expression '^(.*).php$'
  50                         # Array keys are all lower case, array value keep the case used by filename
  51                         #
  52                         wfProfileIn( __METHOD__ . '-init' );
  53
  54                         global $wgStyleDirectory;
  55
  56                         $skinDir = dir( $wgStyleDirectory );
  57
  58                         if ( $skinDir !== false && $skinDir !== null ) {
  59                                 # while code from www.php.net
  60                                 while ( false !== ( $file = $skinDir->read() ) ) {
  61                                         // Skip non-PHP files, hidden files, and '.dep' includes
  62                                         $matches = array();
  63
  64                                         if ( preg_match( '/^([^.]*)\.php$/', $file, $matches ) ) {
  65                                                 $aSkin = $matches[1];
  66
  67                                                 // Explicitly disallow loading core skins via the autodiscovery mechanism.
  68                                                 //
  69                                                 // They should be loaded already (in a non-autodicovery way), but old files might still
  70                                                 // exist on the server because our MW version upgrade process is widely documented as
  71                                                 // requiring just copying over all files, without removing old ones.
  72                                                 //
  73                                                 // This is one of the reasons we should have never used autodiscovery in the first
  74                                                 // place. This hack can be safely removed when autodiscovery is gone.
  75                                                 if ( in_array( $aSkin, array( 'CologneBlue', 'Modern', 'MonoBook', 'Vector' ) ) ) {
  76                                                         continue;
  77                                                 }
  78
  79                                                 $wgValidSkinNames[strtolower( $aSkin )] = $aSkin;
  80                                         }
  81                                 }
  82                                 $skinDir->close();
  83                         }
  84                         $skinsInitialised = true;
  85                         wfProfileOut( __METHOD__ . '-init' );
  86                 }
  87                 return $wgValidSkinNames;
  88         }
  89
  90         /**
  91          * Fetch the skinname messages for available skins.
  92          * @return string[]
  93          */
  94         static function getSkinNameMessages() {
  95                 $messages = array();
  96                 foreach ( self::getSkinNames() as $skinKey => $skinName ) {
  97                         // Messages: skinname-vector, skinname-monobook
  98                         $messages[] = "skinname-$skinKey";
  99                 }
 100                 return $messages;
 101         }
 102
 103         /**
 104          * Fetch the list of user-selectable skins in regards to $wgSkipSkins.
 105          * Useful for Special:Preferences and other places where you
 106          * only want to show skins users _can_ use.
 107          * @return string[]
 108          * @since 1.23
 109          */
 110         public static function getAllowedSkins() {
 111                 global $wgSkipSkins;
 112
 113                 $allowedSkins = self::getSkinNames();
 114
 115                 foreach ( $wgSkipSkins as $skip ) {
 116                         unset( $allowedSkins[$skip] );
 117                 }
 118
 119                 return $allowedSkins;
 120         }
 121
 122         /**
 123          * @deprecated since 1.23, use getAllowedSkins
 124          * @return string[]
 125          */
 126         public static function getUsableSkins() {
 127                 wfDeprecated( __METHOD__, '1.23' );
 128                 return self::getAllowedSkins();
 129         }
 130
 131         /**
 132          * Normalize a skin preference value to a form that can be loaded.
 133          * If a skin can't be found, it will fall back to the configured
 134          * default, or the hardcoded default if that's broken.
 135          * @param string $key 'monobook', 'vector', etc.
 136          * @return string
 137          */
 138         static function normalizeKey( $key ) {
 139                 global $wgDefaultSkin;
 140
 141                 $skinNames = Skin::getSkinNames();
 142
 143                 if ( $key == '' || $key == 'default' ) {
 144                         // Don't return the default immediately;
 145                         // in a misconfiguration we need to fall back.
 146                         $key = $wgDefaultSkin;
 147                 }
 148
 149                 if ( isset( $skinNames[$key] ) ) {
 150                         return $key;
 151                 }
 152
 153                 // Older versions of the software used a numeric setting
 154                 // in the user preferences.
 155                 $fallback = array(
 156                         0 => $wgDefaultSkin,
 157                         2 => 'cologneblue'
 158                 );
 159
 160                 if ( isset( $fallback[$key] ) ) {
 161                         $key = $fallback[$key];
 162                 }
 163
 164                 if ( isset( $skinNames[$key] ) ) {
 165                         return $key;
 166                 } elseif ( isset( $skinNames[$wgDefaultSkin] ) ) {
 167                         return $wgDefaultSkin;
 168                 } else {
 169                         return 'vector';
 170                 }
 171         }
 172
 173         /**
 174          * Factory method for loading a skin of a given type
 175          * @param string $key 'monobook', 'vector', etc.
 176          * @return Skin
 177          */
 178         static function &newFromKey( $key ) {
 179                 global $wgStyleDirectory;
 180
 181                 $key = Skin::normalizeKey( $key );
 182
 183                 $skinNames = Skin::getSkinNames();
 184                 $skinName = $skinNames[$key];
 185                 $className = "Skin{$skinName}";
 186
 187                 # Grab the skin class and initialise it.
 188                 if ( !class_exists( $className ) ) {
 189
 190                         require_once "{$wgStyleDirectory}/{$skinName}.php";
 191
 192                         # Check if we got if not fallback to default skin
 193                         if ( !class_exists( $className ) ) {
 194                                 # DO NOT die if the class isn't found. This breaks maintenance
 195                                 # scripts and can cause a user account to be unrecoverable
 196                                 # except by SQL manipulation if a previously valid skin name
 197                                 # is no longer valid.
 198                                 wfDebug( "Skin class does not exist: $className\n" );
 199                                 $className = 'SkinVector';
 200                         }
 201                 }
 202                 $skin = new $className( $key );
 203                 return $skin;
 204         }
 205
 206         /**
 207          * @return string Skin name
 208          */
 209         public function getSkinName() {
 210                 return $this->skinname;
 211         }
 212
 213         /**
 214          * @param OutputPage $out
 215          */
 216         function initPage( OutputPage $out ) {
 217                 wfProfileIn( __METHOD__ );
 218
 219                 $this->preloadExistence();
 220
 221                 wfProfileOut( __METHOD__ );
 222         }
 223
 224         /**
 225          * Defines the ResourceLoader modules that should be added to the skin
 226          * It is recommended that skins wishing to override call parent::getDefaultModules()
 227          * and substitute out any modules they wish to change by using a key to look them up
 228          * @return array Array of modules with helper keys for easy overriding
 229          */
 230         public function getDefaultModules() {
 231                 global $wgIncludeLegacyJavaScript, $wgPreloadJavaScriptMwUtil, $wgUseAjax,
 232                         $wgAjaxWatch, $wgEnableAPI, $wgEnableWriteAPI;
 233
 234                 $out = $this->getOutput();
 235                 $user = $out->getUser();
 236                 $modules = array(
 237                         // modules that enhance the page content in some way
 238                         'content' => array(
 239                                 'mediawiki.page.ready',
 240                         ),
 241                         // modules that exist for legacy reasons
 242                         'legacy' => array(),
 243                         // modules relating to search functionality
 244                         'search' => array(),
 245                         // modules relating to functionality relating to watching an article
 246                         'watch' => array(),
 247                         // modules which relate to the current users preferences
 248                         'user' => array(),
 249                 );
 250                 if ( $wgIncludeLegacyJavaScript ) {
 251                         $modules['legacy'][] = 'mediawiki.legacy.wikibits';
 252                 }
 253
 254                 if ( $wgPreloadJavaScriptMwUtil ) {
 255                         $modules['legacy'][] = 'mediawiki.util';
 256                 }
 257
 258                 // Add various resources if required
 259                 if ( $wgUseAjax ) {
 260                         $modules['legacy'][] = 'mediawiki.legacy.ajax';
 261
 262                         if ( $wgEnableAPI ) {
 263                                 if ( $wgEnableWriteAPI && $wgAjaxWatch && $user->isLoggedIn()
 264                                         && $user->isAllowed( 'writeapi' )
 265                                 ) {
 266                                         $modules['watch'][] = 'mediawiki.page.watch.ajax';
 267                                 }
 268
 269                                 $modules['search'][] = 'mediawiki.searchSuggest';
 270                         }
 271                 }
 272
 273                 if ( $user->getBoolOption( 'editsectiononrightclick' ) ) {
 274                         $modules['user'][] = 'mediawiki.action.view.rightClickEdit';
 275                 }
 276
 277                 // Crazy edit-on-double-click stuff
 278                 if ( $out->isArticle() && $user->getOption( 'editondblclick' ) ) {
 279                         $modules['user'][] = 'mediawiki.action.view.dblClickEdit';
 280                 }
 281                 return $modules;
 282         }
 283
 284         /**
 285          * Preload the existence of three commonly-requested pages in a single query
 286          */
 287         function preloadExistence() {
 288                 $user = $this->getUser();
 289
 290                 // User/talk link
 291                 $titles = array( $user->getUserPage(), $user->getTalkPage() );
 292
 293                 // Other tab link
 294                 if ( $this->getTitle()->isSpecialPage() ) {
 295                         // nothing
 296                 } elseif ( $this->getTitle()->isTalkPage() ) {
 297                         $titles[] = $this->getTitle()->getSubjectPage();
 298                 } else {
 299                         $titles[] = $this->getTitle()->getTalkPage();
 300                 }
 301
 302                 $lb = new LinkBatch( $titles );
 303                 $lb->setCaller( __METHOD__ );
 304                 $lb->execute();
 305         }
 306
 307         /**
 308          * Get the current revision ID
 309          *
 310          * @return int
 311          */
 312         public function getRevisionId() {
 313                 return $this->getOutput()->getRevisionId();
 314         }
 315
 316         /**
 317          * Whether the revision displayed is the latest revision of the page
 318          *
 319          * @return bool
 320          */
 321         public function isRevisionCurrent() {
 322                 $revID = $this->getRevisionId();
 323                 return $revID == 0 || $revID == $this->getTitle()->getLatestRevID();
 324         }
 325
 326         /**
 327          * Set the "relevant" title
 328          * @see self::getRelevantTitle()
 329          * @param Title $t
 330          */
 331         public function setRelevantTitle( $t ) {
 332                 $this->mRelevantTitle = $t;
 333         }
 334
 335         /**
 336          * Return the "relevant" title.
 337          * A "relevant" title is not necessarily the actual title of the page.
 338          * Special pages like Special:MovePage use set the page they are acting on
 339          * as their "relevant" title, this allows the skin system to display things
 340          * such as content tabs which belong to to that page instead of displaying
 341          * a basic special page tab which has almost no meaning.
 342          *
 343          * @return Title
 344          */
 345         public function getRelevantTitle() {
 346                 if ( isset( $this->mRelevantTitle ) ) {
 347                         return $this->mRelevantTitle;
 348                 }
 349                 return $this->getTitle();
 350         }
 351
 352         /**
 353          * Set the "relevant" user
 354          * @see self::getRelevantUser()
 355          * @param User $u
 356          */
 357         public function setRelevantUser( $u ) {
 358                 $this->mRelevantUser = $u;
 359         }
 360
 361         /**
 362          * Return the "relevant" user.
 363          * A "relevant" user is similar to a relevant title. Special pages like
 364          * Special:Contributions mark the user which they are relevant to so that
 365          * things like the toolbox can display the information they usually are only
 366          * able to display on a user's userpage and talkpage.
 367          * @return User
 368          */
 369         public function getRelevantUser() {
 370                 if ( isset( $this->mRelevantUser ) ) {
 371                         return $this->mRelevantUser;
 372                 }
 373                 $title = $this->getRelevantTitle();
 374                 if ( $title->hasSubjectNamespace( NS_USER ) ) {
 375                         $rootUser = $title->getRootText();
 376                         if ( User::isIP( $rootUser ) ) {
 377                                 $this->mRelevantUser = User::newFromName( $rootUser, false );
 378                         } else {
 379                                 $user = User::newFromName( $rootUser, false );
 380                                 if ( $user && $user->isLoggedIn() ) {
 381                                         $this->mRelevantUser = $user;
 382                                 }
 383                         }
 384                         return $this->mRelevantUser;
 385                 }
 386                 return null;
 387         }
 388
 389         /**
 390          * Outputs the HTML generated by other functions.
 391          * @param OutputPage $out
 392          */
 393         abstract function outputPage( OutputPage $out = null );
 394
 395         /**
 396          * @param array $data
 397          * @return string
 398          */
 399         static function makeVariablesScript( $data ) {
 400                 if ( $data ) {
 401                         return Html::inlineScript(
 402                                 ResourceLoader::makeLoaderConditionalScript( ResourceLoader::makeConfigSetScript( $data ) )
 403                         );
 404                 } else {
 405                         return '';
 406                 }
 407         }
 408
 409         /**
 410          * Make a "<script>" tag containing global variables
 411          *
 412          * @deprecated since 1.19
 413          * @param mixed $unused
 414          * @return string HTML fragment
 415          */
 416         public static function makeGlobalVariablesScript( $unused ) {
 417                 global $wgOut;
 418
 419                 wfDeprecated( __METHOD__, '1.19' );
 420
 421                 return self::makeVariablesScript( $wgOut->getJSVars() );
 422         }
 423
 424         /**
 425          * Get the query to generate a dynamic stylesheet
 426          *
 427          * @return array
 428          */
 429         public static function getDynamicStylesheetQuery() {
 430                 global $wgSquidMaxage;
 431
 432                 return array(
 433                                 'action' => 'raw',
 434                                 'maxage' => $wgSquidMaxage,
 435                                 'usemsgcache' => 'yes',
 436                                 'ctype' => 'text/css',
 437                                 'smaxage' => $wgSquidMaxage,
 438                         );
 439         }
 440
 441         /**
 442          * Add skin specific stylesheets
 443          * Calling this method with an $out of anything but the same OutputPage
 444          * inside ->getOutput() is deprecated. The $out arg is kept
 445          * for compatibility purposes with skins.
 446          * @param OutputPage $out
 447          * @todo delete
 448          */
 449         abstract function setupSkinUserCss( OutputPage $out );
 450
 451         /**
 452          * TODO: document
 453          * @param Title $title
 454          * @return string
 455          */
 456         function getPageClasses( $title ) {
 457                 $numeric = 'ns-' . $title->getNamespace();
 458
 459                 if ( $title->isSpecialPage() ) {
 460                         $type = 'ns-special';
 461                         // bug 23315: provide a class based on the canonical special page name without subpages
 462                         list( $canonicalName ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );
 463                         if ( $canonicalName ) {
 464                                 $type .= ' ' . Sanitizer::escapeClass( "mw-special-$canonicalName" );
 465                         } else {
 466                                 $type .= ' mw-invalidspecialpage';
 467                         }
 468                 } elseif ( $title->isTalkPage() ) {
 469                         $type = 'ns-talk';
 470                 } else {
 471                         $type = 'ns-subject';
 472                 }
 473
 474                 $name = Sanitizer::escapeClass( 'page-' . $title->getPrefixedText() );
 475
 476                 return "$numeric $type $name";
 477         }
 478
 479         /*
 480          * Return values for <html> element
 481          * @return array of associative name-to-value elements for <html> element
 482          */
 483         public function getHtmlElementAttributes() {
 484                 $lang = $this->getLanguage();
 485                 return array(
 486                         'lang' => $lang->getHtmlCode(),
 487                         'dir' => $lang->getDir(),
 488                         'class' => 'client-nojs',
 489                 );
 490         }
 491
 492         /**
 493          * This will be called by OutputPage::headElement when it is creating the
 494          * "<body>" tag, skins can override it if they have a need to add in any
 495          * body attributes or classes of their own.
 496          * @param OutputPage $out
 497          * @param array $bodyAttrs
 498          */
 499         function addToBodyAttributes( $out, &$bodyAttrs ) {
 500                 // does nothing by default
 501         }
 502
 503         /**
 504          * URL to the logo
 505          * @return string
 506          */
 507         function getLogo() {
 508                 global $wgLogo;
 509                 return $wgLogo;
 510         }
 511
 512         /**
 513          * @return string
 514          */
 515         function getCategoryLinks() {
 516                 global $wgUseCategoryBrowser;
 517
 518                 $out = $this->getOutput();
 519                 $allCats = $out->getCategoryLinks();
 520
 521                 if ( !count( $allCats ) ) {
 522                         return '';
 523                 }
 524
 525                 $embed = "<li>";
 526                 $pop = "</li>";
 527
 528                 $s = '';
 529                 $colon = $this->msg( 'colon-separator' )->escaped();
 530
 531                 if ( !empty( $allCats['normal'] ) ) {
 532                         $t = $embed . implode( "{$pop}{$embed}", $allCats['normal'] ) . $pop;
 533
 534                         $msg = $this->msg( 'pagecategories' )->numParams( count( $allCats['normal'] ) )->escaped();
 535                         $linkPage = wfMessage( 'pagecategorieslink' )->inContentLanguage()->text();
 536                         $s .= '<div id="mw-normal-catlinks" class="mw-normal-catlinks">' .
 537                                 Linker::link( Title::newFromText( $linkPage ), $msg )
 538                                 . $colon . '<ul>' . $t . '</ul>' . '</div>';
 539                 }
 540
 541                 # Hidden categories
 542                 if ( isset( $allCats['hidden'] ) ) {
 543                         if ( $this->getUser()->getBoolOption( 'showhiddencats' ) ) {
 544                                 $class = ' mw-hidden-cats-user-shown';
 545                         } elseif ( $this->getTitle()->getNamespace() == NS_CATEGORY ) {
 546                                 $class = ' mw-hidden-cats-ns-shown';
 547                         } else {
 548                                 $class = ' mw-hidden-cats-hidden';
 549                         }
 550
 551                         $s .= "<div id=\"mw-hidden-catlinks\" class=\"mw-hidden-catlinks$class\">" .
 552                                 $this->msg( 'hidden-categories' )->numParams( count( $allCats['hidden'] ) )->escaped() .
 553                                 $colon . '<ul>' . $embed . implode( "{$pop}{$embed}", $allCats['hidden'] ) . $pop . '</ul>' .
 554                                 '</div>';
 555                 }
 556
 557                 # optional 'dmoz-like' category browser. Will be shown under the list
 558                 # of categories an article belong to
 559                 if ( $wgUseCategoryBrowser ) {
 560                         $s .= '<br /><hr />';
 561
 562                         # get a big array of the parents tree
 563                         $parenttree = $this->getTitle()->getParentCategoryTree();
 564                         # Skin object passed by reference cause it can not be
 565                         # accessed under the method subfunction drawCategoryBrowser
 566                         $tempout = explode( "\n", $this->drawCategoryBrowser( $parenttree ) );
 567                         # Clean out bogus first entry and sort them
 568                         unset( $tempout[0] );
 569                         asort( $tempout );
 570                         # Output one per line
 571                         $s .= implode( "<br />\n", $tempout );
 572                 }
 573
 574                 return $s;
 575         }
 576
 577         /**
 578          * Render the array as a series of links.
 579          * @param array $tree Categories tree returned by Title::getParentCategoryTree
 580          * @return string Separated by &gt;, terminate with "\n"
 581          */
 582         function drawCategoryBrowser( $tree ) {
 583                 $return = '';
 584
 585                 foreach ( $tree as $element => $parent ) {
 586                         if ( empty( $parent ) ) {
 587                                 # element start a new list
 588                                 $return .= "\n";
 589                         } else {
 590                                 # grab the others elements
 591                                 $return .= $this->drawCategoryBrowser( $parent ) . ' &gt; ';
 592                         }
 593
 594                         # add our current element to the list
 595                         $eltitle = Title::newFromText( $element );
 596                         $return .= Linker::link( $eltitle, htmlspecialchars( $eltitle->getText() ) );
 597                 }
 598
 599                 return $return;
 600         }
 601
 602         /**
 603          * @return string
 604          */
 605         function getCategories() {
 606                 $out = $this->getOutput();
 607
 608                 $catlinks = $this->getCategoryLinks();
 609
 610                 $classes = 'catlinks';
 611
 612                 // Check what we're showing
 613                 $allCats = $out->getCategoryLinks();
 614                 $showHidden = $this->getUser()->getBoolOption( 'showhiddencats' ) ||
 615                                                 $this->getTitle()->getNamespace() == NS_CATEGORY;
 616
 617                 if ( empty( $allCats['normal'] ) && !( !empty( $allCats['hidden'] ) && $showHidden ) ) {
 618                         $classes .= ' catlinks-allhidden';
 619                 }
 620
 621                 return "<div id='catlinks' class='$classes'>{$catlinks}</div>";
 622         }
 623
 624         /**
 625          * This runs a hook to allow extensions placing their stuff after content
 626          * and article metadata (e.g. categories).
 627          * Note: This function has nothing to do with afterContent().
 628          *
 629          * This hook is placed here in order to allow using the same hook for all
 630          * skins, both the SkinTemplate based ones and the older ones, which directly
 631          * use this class to get their data.
 632          *
 633          * The output of this function gets processed in SkinTemplate::outputPage() for
 634          * the SkinTemplate based skins, all other skins should directly echo it.
 635          *
 636          * @return string Empty by default, if not changed by any hook function.
 637          */
 638         protected function afterContentHook() {
 639                 $data = '';
 640
 641                 if ( wfRunHooks( 'SkinAfterContent', array( &$data, $this ) ) ) {
 642                         // adding just some spaces shouldn't toggle the output
 643                         // of the whole <div/>, so we use trim() here
 644                         if ( trim( $data ) != '' ) {
 645                                 // Doing this here instead of in the skins to
 646                                 // ensure that the div has the same ID in all
 647                                 // skins
 648                                 $data = "<div id='mw-data-after-content'>\n" .
 649                                         "\t$data\n" .
 650                                         "</div>\n";
 651                         }
 652                 } else {
 653                         wfDebug( "Hook SkinAfterContent changed output processing.\n" );
 654                 }
 655
 656                 return $data;
 657         }
 658
 659         /**
 660          * Generate debug data HTML for displaying at the bottom of the main content
 661          * area.
 662          * @return string HTML containing debug data, if enabled (otherwise empty).
 663          */
 664         protected function generateDebugHTML() {
 665                 return MWDebug::getHTMLDebugLog();
 666         }
 667
 668         /**
 669          * This gets called shortly before the "</body>" tag.
 670          *
 671          * @return string HTML-wrapped JS code to be put before "</body>"
 672          */
 673         function bottomScripts() {
 674                 // TODO and the suckage continues. This function is really just a wrapper around
 675                 // OutputPage::getBottomScripts() which takes a Skin param. This should be cleaned
 676                 // up at some point
 677                 $bottomScriptText = $this->getOutput()->getBottomScripts();
 678                 wfRunHooks( 'SkinAfterBottomScripts', array( $this, &$bottomScriptText ) );
 679
 680                 return $bottomScriptText;
 681         }
 682
 683         /**
 684          * Text with the permalink to the source page,
 685          * usually shown on the footer of a printed page
 686          *
 687          * @return string HTML text with an URL
 688          */
 689         function printSource() {
 690                 $oldid = $this->getRevisionId();
 691                 if ( $oldid ) {
 692                         $canonicalUrl = $this->getTitle()->getCanonicalURL( 'oldid=' . $oldid );
 693                         $url = htmlspecialchars( wfExpandIRI( $canonicalUrl ) );
 694                 } else {
 695                         // oldid not available for non existing pages
 696                         $url = htmlspecialchars( wfExpandIRI( $this->getTitle()->getCanonicalURL() ) );
 697                 }
 698
 699                 return $this->msg( 'retrievedfrom', '<a dir="ltr" href="' . $url
 700                         . '">' . $url . '</a>' )->text();
 701         }
 702
 703         /**
 704          * @return string
 705          */
 706         function getUndeleteLink() {
 707                 $action = $this->getRequest()->getVal( 'action', 'view' );
 708
 709                 if ( $this->getUser()->isAllowed( 'deletedhistory' ) &&
 710                         ( $this->getTitle()->getArticleID() == 0 || $action == 'history' ) ) {
 711                         $n = $this->getTitle()->isDeleted();
 712
 713                         if ( $n ) {
 714                                 if ( $this->getUser()->isAllowed( 'undelete' ) ) {
 715                                         $msg = 'thisisdeleted';
 716                                 } else {
 717                                         $msg = 'viewdeleted';
 718                                 }
 719
 720                                 return $this->msg( $msg )->rawParams(
 721                                         Linker::linkKnown(
 722                                                 SpecialPage::getTitleFor( 'Undelete', $this->getTitle()->getPrefixedDBkey() ),
 723                                                 $this->msg( 'restorelink' )->numParams( $n )->escaped() )
 724                                         )->text();
 725                         }
 726                 }
 727
 728                 return '';
 729         }
 730
 731         /**
 732          * @return string
 733          */
 734         function subPageSubtitle() {
 735                 $out = $this->getOutput();
 736                 $subpages = '';
 737
 738                 if ( !wfRunHooks( 'SkinSubPageSubtitle', array( &$subpages, $this, $out ) ) ) {
 739                         return $subpages;
 740                 }
 741
 742                 if ( $out->isArticle() && MWNamespace::hasSubpages( $out->getTitle()->getNamespace() ) ) {
 743                         $ptext = $this->getTitle()->getPrefixedText();
 744                         if ( preg_match( '/\//', $ptext ) ) {
 745                                 $links = explode( '/', $ptext );
 746                                 array_pop( $links );
 747                                 $c = 0;
 748                                 $growinglink = '';
 749                                 $display = '';
 750                                 $lang = $this->getLanguage();
 751
 752                                 foreach ( $links as $link ) {
 753                                         $growinglink .= $link;
 754                                         $display .= $link;
 755                                         $linkObj = Title::newFromText( $growinglink );
 756
 757                                         if ( is_object( $linkObj ) && $linkObj->isKnown() ) {
 758                                                 $getlink = Linker::linkKnown(
 759                                                         $linkObj,
 760                                                         htmlspecialchars( $display )
 761                                                 );
 762
 763                                                 $c++;
 764
 765                                                 if ( $c > 1 ) {
 766                                                         $subpages .= $lang->getDirMarkEntity() . $this->msg( 'pipe-separator' )->escaped();
 767                                                 } else {
 768                                                         $subpages .= '&lt; ';
 769                                                 }
 770
 771                                                 $subpages .= $getlink;
 772                                                 $display = '';
 773                                         } else {
 774                                                 $display .= '/';
 775                                         }
 776                                         $growinglink .= '/';
 777                                 }
 778                         }
 779                 }
 780
 781                 return $subpages;
 782         }
 783
 784         /**
 785          * Returns true if the IP should be shown in the header
 786          * @return bool
 787          */
 788         function showIPinHeader() {
 789                 global $wgShowIPinHeader;
 790                 return $wgShowIPinHeader && session_id() != '';
 791         }
 792
 793         /**
 794          * @return string
 795          */
 796         function getSearchLink() {
 797                 $searchPage = SpecialPage::getTitleFor( 'Search' );
 798                 return $searchPage->getLocalURL();
 799         }
 800
 801         /**
 802          * @return string
 803          */
 804         function escapeSearchLink() {
 805                 return htmlspecialchars( $this->getSearchLink() );
 806         }
 807
 808         /**
 809          * @param string $type
 810          * @return string
 811          */
 812         function getCopyright( $type = 'detect' ) {
 813                 global $wgRightsPage, $wgRightsUrl, $wgRightsText, $wgContLang;
 814
 815                 if ( $type == 'detect' ) {
 816                         if ( !$this->isRevisionCurrent()
 817                                 && !$this->msg( 'history_copyright' )->inContentLanguage()->isDisabled()
 818                         ) {
 819                                 $type = 'history';
 820                         } else {
 821                                 $type = 'normal';
 822                         }
 823                 }
 824
 825                 if ( $type == 'history' ) {
 826                         $msg = 'history_copyright';
 827                 } else {
 828                         $msg = 'copyright';
 829                 }
 830
 831                 if ( $wgRightsPage ) {
 832                         $title = Title::newFromText( $wgRightsPage );
 833                         $link = Linker::linkKnown( $title, $wgRightsText );
 834                 } elseif ( $wgRightsUrl ) {
 835                         $link = Linker::makeExternalLink( $wgRightsUrl, $wgRightsText );
 836                 } elseif ( $wgRightsText ) {
 837                         $link = $wgRightsText;
 838                 } else {
 839                         # Give up now
 840                         return '';
 841                 }
 842
 843                 // Allow for site and per-namespace customization of copyright notice.
 844                 // @todo Remove deprecated $forContent param from hook handlers and then remove here.
 845                 $forContent = true;
 846
 847                 wfRunHooks(
 848                         'SkinCopyrightFooter',
 849                         array( $this->getTitle(), $type, &$msg, &$link, &$forContent )
 850                 );
 851
 852                 return $this->msg( $msg )->rawParams( $link )->text();
 853         }
 854
 855         /**
 856          * @return null|string
 857          */
 858         function getCopyrightIcon() {
 859                 global $wgRightsUrl, $wgRightsText, $wgRightsIcon, $wgCopyrightIcon;
 860
 861                 $out = '';
 862
 863                 if ( isset( $wgCopyrightIcon ) && $wgCopyrightIcon ) {
 864                         $out = $wgCopyrightIcon;
 865                 } elseif ( $wgRightsIcon ) {
 866                         $icon = htmlspecialchars( $wgRightsIcon );
 867
 868                         if ( $wgRightsUrl ) {
 869                                 $url = htmlspecialchars( $wgRightsUrl );
 870                                 $out .= '<a href="' . $url . '">';
 871                         }
 872
 873                         $text = htmlspecialchars( $wgRightsText );
 874                         $out .= "<img src=\"$icon\" alt=\"$text\" width=\"88\" height=\"31\" />";
 875
 876                         if ( $wgRightsUrl ) {
 877                                 $out .= '</a>';
 878                         }
 879                 }
 880
 881                 return $out;
 882         }
 883
 884         /**
 885          * Gets the powered by MediaWiki icon.
 886          * @return string
 887          */
 888         function getPoweredBy() {
 889                 global $wgStylePath;
 890
 891                 $url = htmlspecialchars( "$wgStylePath/common/images/poweredby_mediawiki_88x31.png" );
 892                 $text = '<a href="//www.mediawiki.org/"><img src="' . $url
 893                         . '" height="31" width="88" alt="Powered by MediaWiki" /></a>';
 894                 wfRunHooks( 'SkinGetPoweredBy', array( &$text, $this ) );
 895                 return $text;
 896         }
 897
 898         /**
 899          * Get the timestamp of the latest revision, formatted in user language
 900          *
 901          * @return string
 902          */
 903         protected function lastModified() {
 904                 $timestamp = $this->getOutput()->getRevisionTimestamp();
 905
 906                 # No cached timestamp, load it from the database
 907                 if ( $timestamp === null ) {
 908                         $timestamp = Revision::getTimestampFromId( $this->getTitle(), $this->getRevisionId() );
 909                 }
 910
 911                 if ( $timestamp ) {
 912                         $d = $this->getLanguage()->userDate( $timestamp, $this->getUser() );
 913                         $t = $this->getLanguage()->userTime( $timestamp, $this->getUser() );
 914                         $s = ' ' . $this->msg( 'lastmodifiedat', $d, $t )->text();
 915                 } else {
 916                         $s = '';
 917                 }
 918
 919                 if ( wfGetLB()->getLaggedSlaveMode() ) {
 920                         $s .= ' <strong>' . $this->msg( 'laggedslavemode' )->text() . '</strong>';
 921                 }
 922
 923                 return $s;
 924         }
 925
 926         /**
 927          * @param string $align
 928          * @return string
 929          */
 930         function logoText( $align = '' ) {
 931                 if ( $align != '' ) {
 932                         $a = " style='float: {$align};'";
 933                 } else {
 934                         $a = '';
 935                 }
 936
 937                 $mp = $this->msg( 'mainpage' )->escaped();
 938                 $mptitle = Title::newMainPage();
 939                 $url = ( is_object( $mptitle ) ? htmlspecialchars( $mptitle->getLocalURL() ) : '' );
 940
 941                 $logourl = $this->getLogo();
 942                 $s = "<a href='{$url}'><img{$a} src='{$logourl}' alt='[{$mp}]' /></a>";
 943
 944                 return $s;
 945         }
 946
 947         /**
 948          * Renders a $wgFooterIcons icon according to the method's arguments
 949          * @param array $icon The icon to build the html for, see $wgFooterIcons
 950          *   for the format of this array.
 951          * @param bool|string $withImage Whether to use the icon's image or output
 952          *   a text-only footericon.
 953          * @return string HTML
 954          */
 955         function makeFooterIcon( $icon, $withImage = 'withImage' ) {
 956                 if ( is_string( $icon ) ) {
 957                         $html = $icon;
 958                 } else { // Assuming array
 959                         $url = isset( $icon["url"] ) ? $icon["url"] : null;
 960                         unset( $icon["url"] );
 961                         if ( isset( $icon["src"] ) && $withImage === 'withImage' ) {
 962                                 // do this the lazy way, just pass icon data as an attribute array
 963                                 $html = Html::element( 'img', $icon );
 964                         } else {
 965                                 $html = htmlspecialchars( $icon["alt"] );
 966                         }
 967                         if ( $url ) {
 968                                 $html = Html::rawElement( 'a', array( "href" => $url ), $html );
 969                         }
 970                 }
 971                 return $html;
 972         }
 973
 974         /**
 975          * Gets the link to the wiki's main page.
 976          * @return string
 977          */
 978         function mainPageLink() {
 979                 $s = Linker::linkKnown(
 980                         Title::newMainPage(),
 981                         $this->msg( 'mainpage' )->escaped()
 982                 );
 983
 984                 return $s;
 985         }
 986
 987         /**
 988          * Returns an HTML link for use in the footer
 989          * @param string $desc i18n message key for the link text
 990          * @param string $page i18n message key for the page to link to
 991          * @return string HTML anchor
 992          */
 993         public function footerLink( $desc, $page ) {
 994                 // if the link description has been set to "-" in the default language,
 995                 if ( $this->msg( $desc )->inContentLanguage()->isDisabled() ) {
 996                         // then it is disabled, for all languages.
 997                         return '';
 998                 } else {
 999                         // Otherwise, we display the link for the user, described in their
1000                         // language (which may or may not be the same as the default language),
1001                         // but we make the link target be the one site-wide page.
1002                         $title = Title::newFromText( $this->msg( $page )->inContentLanguage()->text() );
1003
1004                         return Linker::linkKnown(
1005                                 $title,
1006                                 $this->msg( $desc )->escaped()
1007                         );
1008                 }
1009         }
1010
1011         /**
1012          * Gets the link to the wiki's privacy policy page.
1013          * @return string HTML
1014          */
1015         function privacyLink() {
1016                 return $this->footerLink( 'privacy', 'privacypage' );
1017         }
1018
1019         /**
1020          * Gets the link to the wiki's about page.
1021          * @return string HTML
1022          */
1023         function aboutLink() {
1024                 return $this->footerLink( 'aboutsite', 'aboutpage' );
1025         }
1026
1027         /**
1028          * Gets the link to the wiki's general disclaimers page.
1029          * @return string HTML
1030          */
1031         function disclaimerLink() {
1032                 return $this->footerLink( 'disclaimers', 'disclaimerpage' );
1033         }
1034
1035         /**
1036          * Return URL options for the 'edit page' link.
1037          * This may include an 'oldid' specifier, if the current page view is such.
1038          *
1039          * @return array
1040          * @private
1041          */
1042         function editUrlOptions() {
1043                 $options = array( 'action' => 'edit' );
1044
1045                 if ( !$this->isRevisionCurrent() ) {
1046                         $options['oldid'] = intval( $this->getRevisionId() );
1047                 }
1048
1049                 return $options;
1050         }
1051
1052         /**
1053          * @param User|int $id
1054          * @return bool
1055          */
1056         function showEmailUser( $id ) {
1057                 if ( $id instanceof User ) {
1058                         $targetUser = $id;
1059                 } else {
1060                         $targetUser = User::newFromId( $id );
1061                 }
1062
1063                 # The sending user must have a confirmed email address and the target
1064                 # user must have a confirmed email address and allow emails from users.
1065                 return $this->getUser()->canSendEmail() &&
1066                         $targetUser->canReceiveEmail();
1067         }
1068
1069         /**
1070          * Return a fully resolved style path url to images or styles stored in the common folder.
1071          * This method returns a url resolved using the configured skin style path
1072          * and includes the style version inside of the url.
1073          * @param string $name The name or path of a skin resource file
1074          * @return string The fully resolved style path url including styleversion
1075          */
1076         function getCommonStylePath( $name ) {
1077                 global $wgStylePath, $wgStyleVersion;
1078                 return "$wgStylePath/common/$name?$wgStyleVersion";
1079         }
1080
1081         /**
1082          * Return a fully resolved style path url to images or styles stored in the current skins's folder.
1083          * This method returns a url resolved using the configured skin style path
1084          * and includes the style version inside of the url.
1085          * @param string $name The name or path of a skin resource file
1086          * @return string The fully resolved style path url including styleversion
1087          */
1088         function getSkinStylePath( $name ) {
1089                 global $wgStylePath, $wgStyleVersion;
1090                 return "$wgStylePath/{$this->stylename}/$name?$wgStyleVersion";
1091         }
1092
1093         /* these are used extensively in SkinTemplate, but also some other places */
1094
1095         /**
1096          * @param string $urlaction
1097          * @return string
1098          */
1099         static function makeMainPageUrl( $urlaction = '' ) {
1100                 $title = Title::newMainPage();
1101                 self::checkTitle( $title, '' );
1102
1103                 return $title->getLocalURL( $urlaction );
1104         }
1105
1106         /**
1107          * Make a URL for a Special Page using the given query and protocol.
1108          *
1109          * If $proto is set to null, make a local URL. Otherwise, make a full
1110          * URL with the protocol specified.
1111          *
1112          * @param string $name Name of the Special page
1113          * @param string $urlaction Query to append
1114          * @param string|null $proto Protocol to use or null for a local URL
1115          * @return string
1116          */
1117         static function makeSpecialUrl( $name, $urlaction = '', $proto = null ) {
1118                 $title = SpecialPage::getSafeTitleFor( $name );
1119                 if ( is_null( $proto ) ) {
1120                         return $title->getLocalURL( $urlaction );
1121                 } else {
1122                         return $title->getFullURL( $urlaction, false, $proto );
1123                 }
1124         }
1125
1126         /**
1127          * @param string $name
1128          * @param string $subpage
1129          * @param string $urlaction
1130          * @return string
1131          */
1132         static function makeSpecialUrlSubpage( $name, $subpage, $urlaction = '' ) {
1133                 $title = SpecialPage::getSafeTitleFor( $name, $subpage );
1134                 return $title->getLocalURL( $urlaction );
1135         }
1136
1137         /**
1138          * @param string $name
1139          * @param string $urlaction
1140          * @return string
1141          */
1142         static function makeI18nUrl( $name, $urlaction = '' ) {
1143                 $title = Title::newFromText( wfMessage( $name )->inContentLanguage()->text() );
1144                 self::checkTitle( $title, $name );
1145                 return $title->getLocalURL( $urlaction );
1146         }
1147
1148         /**
1149          * @param string $name
1150          * @param string $urlaction
1151          * @return string
1152          */
1153         static function makeUrl( $name, $urlaction = '' ) {
1154                 $title = Title::newFromText( $name );
1155                 self::checkTitle( $title, $name );
1156
1157                 return $title->getLocalURL( $urlaction );
1158         }
1159
1160         /**
1161          * If url string starts with http, consider as external URL, else
1162          * internal
1163          * @param string $name
1164          * @return string URL
1165          */
1166         static function makeInternalOrExternalUrl( $name ) {
1167                 if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $name ) ) {
1168                         return $name;
1169                 } else {
1170                         return self::makeUrl( $name );
1171                 }
1172         }
1173
1174         /**
1175          * this can be passed the NS number as defined in Language.php
1176          * @param string $name
1177          * @param string $urlaction
1178          * @param int $namespace
1179          * @return string
1180          */
1181         static function makeNSUrl( $name, $urlaction = '', $namespace = NS_MAIN ) {
1182                 $title = Title::makeTitleSafe( $namespace, $name );
1183                 self::checkTitle( $title, $name );
1184
1185                 return $title->getLocalURL( $urlaction );
1186         }
1187
1188         /**
1189          * these return an array with the 'href' and boolean 'exists'
1190          * @param string $name
1191          * @param string $urlaction
1192          * @return array
1193          */
1194         static function makeUrlDetails( $name, $urlaction = '' ) {
1195                 $title = Title::newFromText( $name );
1196                 self::checkTitle( $title, $name );
1197
1198                 return array(
1199                         'href' => $title->getLocalURL( $urlaction ),
1200                         'exists' => $title->getArticleID() != 0,
1201                 );
1202         }
1203
1204         /**
1205          * Make URL details where the article exists (or at least it's convenient to think so)
1206          * @param string $name Article name
1207          * @param string $urlaction
1208          * @return array
1209          */
1210         static function makeKnownUrlDetails( $name, $urlaction = '' ) {
1211                 $title = Title::newFromText( $name );
1212                 self::checkTitle( $title, $name );
1213
1214                 return array(
1215                         'href' => $title->getLocalURL( $urlaction ),
1216                         'exists' => true
1217                 );
1218         }
1219
1220         /**
1221          * make sure we have some title to operate on
1222          *
1223          * @param Title $title
1224          * @param string $name
1225          */
1226         static function checkTitle( &$title, $name ) {
1227                 if ( !is_object( $title ) ) {
1228                         $title = Title::newFromText( $name );
1229                         if ( !is_object( $title ) ) {
1230                                 $title = Title::newFromText( '--error: link target missing--' );
1231                         }
1232                 }
1233         }
1234
1235         /**
1236          * Build an array that represents the sidebar(s), the navigation bar among them.
1237          *
1238          * BaseTemplate::getSidebar can be used to simplify the format and id generation in new skins.
1239          *
1240          * The format of the returned array is array( heading => content, ... ), where:
1241          * - heading is the heading of a navigation portlet. It is either:
1242          *   - magic string to be handled by the skins ('SEARCH' / 'LANGUAGES' / 'TOOLBOX' / ...)
1243          *   - a message name (e.g. 'navigation'), the message should be HTML-escaped by the skin
1244          *   - plain text, which should be HTML-escaped by the skin
1245          * - content is the contents of the portlet. It is either:
1246          *   - HTML text (<ul><li>...</li>...</ul>)
1247          *   - array of link data in a format accepted by BaseTemplate::makeListItem()
1248          *   - (for a magic string as a key, any value)
1249          *
1250          * Note that extensions can control the sidebar contents using the SkinBuildSidebar hook
1251          * and can technically insert anything in here; skin creators are expected to handle
1252          * values described above.
1253          *
1254          * @return array
1255          */
1256         function buildSidebar() {
1257                 global $wgMemc, $wgEnableSidebarCache, $wgSidebarCacheExpiry;
1258                 wfProfileIn( __METHOD__ );
1259
1260                 $key = wfMemcKey( 'sidebar', $this->getLanguage()->getCode() );
1261
1262                 if ( $wgEnableSidebarCache ) {
1263                         $cachedsidebar = $wgMemc->get( $key );
1264                         if ( $cachedsidebar ) {
1265                                 wfRunHooks( 'SidebarBeforeOutput', array( $this, &$cachedsidebar ) );
1266
1267                                 wfProfileOut( __METHOD__ );
1268                                 return $cachedsidebar;
1269                         }
1270                 }
1271
1272                 $bar = array();
1273                 $this->addToSidebar( $bar, 'sidebar' );
1274
1275                 wfRunHooks( 'SkinBuildSidebar', array( $this, &$bar ) );
1276                 if ( $wgEnableSidebarCache ) {
1277                         $wgMemc->set( $key, $bar, $wgSidebarCacheExpiry );
1278                 }
1279
1280                 wfRunHooks( 'SidebarBeforeOutput', array( $this, &$bar ) );
1281
1282                 wfProfileOut( __METHOD__ );
1283                 return $bar;
1284         }
1285
1286         /**
1287          * Add content from a sidebar system message
1288          * Currently only used for MediaWiki:Sidebar (but may be used by Extensions)
1289          *
1290          * This is just a wrapper around addToSidebarPlain() for backwards compatibility
1291          *
1292          * @param array $bar
1293          * @param string $message
1294          */
1295         function addToSidebar( &$bar, $message ) {
1296                 $this->addToSidebarPlain( $bar, wfMessage( $message )->inContentLanguage()->plain() );
1297         }
1298
1299         /**
1300          * Add content from plain text
1301          * @since 1.17
1302          * @param array $bar
1303          * @param string $text
1304          * @return array
1305          */
1306         function addToSidebarPlain( &$bar, $text ) {
1307                 $lines = explode( "\n", $text );
1308
1309                 $heading = '';
1310
1311                 foreach ( $lines as $line ) {
1312                         if ( strpos( $line, '*' ) !== 0 ) {
1313                                 continue;
1314                         }
1315                         $line = rtrim( $line, "\r" ); // for Windows compat
1316
1317                         if ( strpos( $line, '**' ) !== 0 ) {
1318                                 $heading = trim( $line, '* ' );
1319                                 if ( !array_key_exists( $heading, $bar ) ) {
1320                                         $bar[$heading] = array();
1321                                 }
1322                         } else {
1323                                 $line = trim( $line, '* ' );
1324
1325                                 if ( strpos( $line, '|' ) !== false ) { // sanity check
1326                                         $line = MessageCache::singleton()->transform( $line, false, null, $this->getTitle() );
1327                                         $line = array_map( 'trim', explode( '|', $line, 2 ) );
1328                                         if ( count( $line ) !== 2 ) {
1329                                                 // Second sanity check, could be hit by people doing
1330                                                 // funky stuff with parserfuncs... (bug 33321)
1331                                                 continue;
1332                                         }
1333
1334                                         $extraAttribs = array();
1335
1336                                         $msgLink = $this->msg( $line[0] )->inContentLanguage();
1337                                         if ( $msgLink->exists() ) {
1338                                                 $link = $msgLink->text();
1339                                                 if ( $link == '-' ) {
1340                                                         continue;
1341                                                 }
1342                                         } else {
1343                                                 $link = $line[0];
1344                                         }
1345                                         $msgText = $this->msg( $line[1] );
1346                                         if ( $msgText->exists() ) {
1347                                                 $text = $msgText->text();
1348                                         } else {
1349                                                 $text = $line[1];
1350                                         }
1351
1352                                         if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $link ) ) {
1353                                                 $href = $link;
1354
1355                                                 // Parser::getExternalLinkAttribs won't work here because of the Namespace things
1356                                                 global $wgNoFollowLinks, $wgNoFollowDomainExceptions;
1357                                                 if ( $wgNoFollowLinks && !wfMatchesDomainList( $href, $wgNoFollowDomainExceptions ) ) {
1358                                                         $extraAttribs['rel'] = 'nofollow';
1359                                                 }
1360
1361                                                 global $wgExternalLinkTarget;
1362                                                 if ( $wgExternalLinkTarget ) {
1363                                                         $extraAttribs['target'] = $wgExternalLinkTarget;
1364                                                 }
1365                                         } else {
1366                                                 $title = Title::newFromText( $link );
1367
1368                                                 if ( $title ) {
1369                                                         $title = $title->fixSpecialName();
1370                                                         $href = $title->getLinkURL();
1371                                                 } else {
1372                                                         $href = 'INVALID-TITLE';
1373                                                 }
1374                                         }
1375
1376                                         $bar[$heading][] = array_merge( array(
1377                                                 'text' => $text,
1378                                                 'href' => $href,
1379                                                 'id' => 'n-' . Sanitizer::escapeId( strtr( $line[1], ' ', '-' ), 'noninitial' ),
1380                                                 'active' => false
1381                                         ), $extraAttribs );
1382                                 } else {
1383                                         continue;
1384                                 }
1385                         }
1386                 }
1387
1388                 return $bar;
1389         }
1390
1391         /**
1392          * This function previously controlled whether the 'mediawiki.legacy.wikiprintable' module
1393          * should be loaded by OutputPage. That module no longer exists and the return value of this
1394          * method is ignored.
1395          *
1396          * If your skin doesn't provide its own print styles, the 'mediawiki.legacy.commonPrint' module
1397          * can be used instead (SkinTemplate-based skins do it automatically).
1398          *
1399          * @deprecated since 1.22
1400          * @return bool
1401          */
1402         public function commonPrintStylesheet() {
1403                 wfDeprecated( __METHOD__, '1.22' );
1404                 return false;
1405         }
1406
1407         /**
1408          * Gets new talk page messages for the current user and returns an
1409          * appropriate alert message (or an empty string if there are no messages)
1410          * @return string
1411          */
1412         function getNewtalks() {
1413
1414                 $newMessagesAlert = '';
1415                 $user = $this->getUser();
1416                 $newtalks = $user->getNewMessageLinks();
1417                 $out = $this->getOutput();
1418
1419                 // Allow extensions to disable or modify the new messages alert
1420                 if ( !wfRunHooks( 'GetNewMessagesAlert', array( &$newMessagesAlert, $newtalks, $user, $out ) ) ) {
1421                         return '';
1422                 }
1423                 if ( $newMessagesAlert ) {
1424                         return $newMessagesAlert;
1425                 }
1426
1427                 if ( count( $newtalks ) == 1 && $newtalks[0]['wiki'] === wfWikiID() ) {
1428                         $uTalkTitle = $user->getTalkPage();
1429                         $lastSeenRev = isset( $newtalks[0]['rev'] ) ? $newtalks[0]['rev'] : null;
1430                         $nofAuthors = 0;
1431                         if ( $lastSeenRev !== null ) {
1432                                 $plural = true; // Default if we have a last seen revision: if unknown, use plural
1433                                 $latestRev = Revision::newFromTitle( $uTalkTitle, false, Revision::READ_NORMAL );
1434                                 if ( $latestRev !== null ) {
1435                                         // Singular if only 1 unseen revision, plural if several unseen revisions.
1436                                         $plural = $latestRev->getParentId() !== $lastSeenRev->getId();
1437                                         $nofAuthors = $uTalkTitle->countAuthorsBetween(
1438                                                 $lastSeenRev, $latestRev, 10, 'include_new' );
1439                                 }
1440                         } else {
1441                                 // Singular if no revision -> diff link will show latest change only in any case
1442                                 $plural = false;
1443                         }
1444                         $plural = $plural ? 999 : 1;
1445                         // 999 signifies "more than one revision". We don't know how many, and even if we did,
1446                         // the number of revisions or authors is not necessarily the same as the number of
1447                         // "messages".
1448                         $newMessagesLink = Linker::linkKnown(
1449                                 $uTalkTitle,
1450                                 $this->msg( 'newmessageslinkplural' )->params( $plural )->escaped(),
1451                                 array(),
1452                                 array( 'redirect' => 'no' )
1453                         );
1454
1455                         $newMessagesDiffLink = Linker::linkKnown(
1456                                 $uTalkTitle,
1457                                 $this->msg( 'newmessagesdifflinkplural' )->params( $plural )->escaped(),
1458                                 array(),
1459                                 $lastSeenRev !== null
1460                                         ? array( 'oldid' => $lastSeenRev->getId(), 'diff' => 'cur' )
1461                                         : array( 'diff' => 'cur' )
1462                         );
1463
1464                         if ( $nofAuthors >= 1 && $nofAuthors <= 10 ) {
1465                                 $newMessagesAlert = $this->msg(
1466                                         'youhavenewmessagesfromusers',
1467                                         $newMessagesLink,
1468                                         $newMessagesDiffLink
1469                                 )->numParams( $nofAuthors, $plural );
1470                         } else {
1471                                 // $nofAuthors === 11 signifies "11 or more" ("more than 10")
1472                                 $newMessagesAlert = $this->msg(
1473                                         $nofAuthors > 10 ? 'youhavenewmessagesmanyusers' : 'youhavenewmessages',
1474                                         $newMessagesLink,
1475                                         $newMessagesDiffLink
1476                                 )->numParams( $plural );
1477                         }
1478                         $newMessagesAlert = $newMessagesAlert->text();
1479                         # Disable Squid cache
1480                         $out->setSquidMaxage( 0 );
1481                 } elseif ( count( $newtalks ) ) {
1482                         $sep = $this->msg( 'newtalkseparator' )->escaped();
1483                         $msgs = array();
1484
1485                         foreach ( $newtalks as $newtalk ) {
1486                                 $msgs[] = Xml::element(
1487                                         'a',
1488                                         array( 'href' => $newtalk['link'] ), $newtalk['wiki']
1489                                 );
1490                         }
1491                         $parts = implode( $sep, $msgs );
1492                         $newMessagesAlert = $this->msg( 'youhavenewmessagesmulti' )->rawParams( $parts )->escaped();
1493                         $out->setSquidMaxage( 0 );
1494                 }
1495
1496                 return $newMessagesAlert;
1497         }
1498
1499         /**
1500          * Get a cached notice
1501          *
1502          * @param string $name Message name, or 'default' for $wgSiteNotice
1503          * @return string HTML fragment
1504          */
1505         private function getCachedNotice( $name ) {
1506                 global $wgRenderHashAppend, $parserMemc, $wgContLang;
1507
1508                 wfProfileIn( __METHOD__ );
1509
1510                 $needParse = false;
1511
1512                 if ( $name === 'default' ) {
1513                         // special case
1514                         global $wgSiteNotice;
1515                         $notice = $wgSiteNotice;
1516                         if ( empty( $notice ) ) {
1517                                 wfProfileOut( __METHOD__ );
1518                                 return false;
1519                         }
1520                 } else {
1521                         $msg = $this->msg( $name )->inContentLanguage();
1522                         if ( $msg->isDisabled() ) {
1523                                 wfProfileOut( __METHOD__ );
1524                                 return false;
1525                         }
1526                         $notice = $msg->plain();
1527                 }
1528
1529                 // Use the extra hash appender to let eg SSL variants separately cache.
1530                 $key = wfMemcKey( $name . $wgRenderHashAppend );
1531                 $cachedNotice = $parserMemc->get( $key );
1532                 if ( is_array( $cachedNotice ) ) {
1533                         if ( md5( $notice ) == $cachedNotice['hash'] ) {
1534                                 $notice = $cachedNotice['html'];
1535                         } else {
1536                                 $needParse = true;
1537                         }
1538                 } else {
1539                         $needParse = true;
1540                 }
1541
1542                 if ( $needParse ) {
1543                         $parsed = $this->getOutput()->parse( $notice );
1544                         $parserMemc->set( $key, array( 'html' => $parsed, 'hash' => md5( $notice ) ), 600 );
1545                         $notice = $parsed;
1546                 }
1547
1548                 $notice = Html::rawElement( 'div', array( 'id' => 'localNotice',
1549                         'lang' => $wgContLang->getHtmlCode(), 'dir' => $wgContLang->getDir() ), $notice );
1550                 wfProfileOut( __METHOD__ );
1551                 return $notice;
1552         }
1553
1554         /**
1555          * Get a notice based on page's namespace
1556          *
1557          * @return string HTML fragment
1558          */
1559         function getNamespaceNotice() {
1560                 wfProfileIn( __METHOD__ );
1561
1562                 $key = 'namespacenotice-' . $this->getTitle()->getNsText();
1563                 $namespaceNotice = $this->getCachedNotice( $key );
1564                 if ( $namespaceNotice && substr( $namespaceNotice, 0, 7 ) != '<p>&lt;' ) {
1565                         $namespaceNotice = '<div id="namespacebanner">' . $namespaceNotice . '</div>';
1566                 } else {
1567                         $namespaceNotice = '';
1568                 }
1569
1570                 wfProfileOut( __METHOD__ );
1571                 return $namespaceNotice;
1572         }
1573
1574         /**
1575          * Get the site notice
1576          *
1577          * @return string HTML fragment
1578          */
1579         function getSiteNotice() {
1580                 wfProfileIn( __METHOD__ );
1581                 $siteNotice = '';
1582
1583                 if ( wfRunHooks( 'SiteNoticeBefore', array( &$siteNotice, $this ) ) ) {
1584                         if ( is_object( $this->getUser() ) && $this->getUser()->isLoggedIn() ) {
1585                                 $siteNotice = $this->getCachedNotice( 'sitenotice' );
1586                         } else {
1587                                 $anonNotice = $this->getCachedNotice( 'anonnotice' );
1588                                 if ( !$anonNotice ) {
1589                                         $siteNotice = $this->getCachedNotice( 'sitenotice' );
1590                                 } else {
1591                                         $siteNotice = $anonNotice;
1592                                 }
1593                         }
1594                         if ( !$siteNotice ) {
1595                                 $siteNotice = $this->getCachedNotice( 'default' );
1596                         }
1597                 }
1598
1599                 wfRunHooks( 'SiteNoticeAfter', array( &$siteNotice, $this ) );
1600                 wfProfileOut( __METHOD__ );
1601                 return $siteNotice;
1602         }
1603
1604         /**
1605          * Create a section edit link.  This supersedes editSectionLink() and
1606          * editSectionLinkForOther().
1607          *
1608          * @param Title $nt The title being linked to (may not be the same as
1609          *   the current page, if the section is included from a template)
1610          * @param string $section The designation of the section being pointed to,
1611          *   to be included in the link, like "&section=$section"
1612          * @param string $tooltip The tooltip to use for the link: will be escaped
1613          *   and wrapped in the 'editsectionhint' message
1614          * @param string $lang Language code
1615          * @return string HTML to use for edit link
1616          */
1617         public function doEditSectionLink( Title $nt, $section, $tooltip = null, $lang = false ) {
1618                 // HTML generated here should probably have userlangattributes
1619                 // added to it for LTR text on RTL pages
1620
1621                 $lang = wfGetLangObj( $lang );
1622
1623                 $attribs = array();
1624                 if ( !is_null( $tooltip ) ) {
1625                         # Bug 25462: undo double-escaping.
1626                         $tooltip = Sanitizer::decodeCharReferences( $tooltip );
1627                         $attribs['title'] = wfMessage( 'editsectionhint' )->rawParams( $tooltip )
1628                                 ->inLanguage( $lang )->text();
1629                 }
1630                 $link = Linker::link( $nt, wfMessage( 'editsection' )->inLanguage( $lang )->text(),
1631                         $attribs,
1632                         array( 'action' => 'edit', 'section' => $section ),
1633                         array( 'noclasses', 'known' )
1634                 );
1635
1636                 # Add the brackets and the span and run the hook.
1637                 $result = '<span class="mw-editsection">'
1638                         . '<span class="mw-editsection-bracket">[</span>'
1639                         . $link
1640                         . '<span class="mw-editsection-bracket">]</span>'
1641                         . '</span>';
1642
1643                 wfRunHooks( 'DoEditSectionLink', array( $this, $nt, $section, $tooltip, &$result, $lang ) );
1644                 return $result;
1645         }
1646
1647         /**
1648          * Use PHP's magic __call handler to intercept legacy calls to the linker
1649          * for backwards compatibility.
1650          *
1651          * @param string $fname Name of called method
1652          * @param array $args Arguments to the method
1653          * @throws MWException
1654          * @return mixed
1655          */
1656         function __call( $fname, $args ) {
1657                 $realFunction = array( 'Linker', $fname );
1658                 if ( is_callable( $realFunction ) ) {
1659                         wfDeprecated( get_class( $this ) . '::' . $fname, '1.21' );
1660                         return call_user_func_array( $realFunction, $args );
1661                 } else {
1662                         $className = get_class( $this );
1663                         throw new MWException( "Call to undefined method $className::$fname" );
1664                 }
1665         }
1666
1667 }