includes/ChangesList.php

   1 <?php
   2 /**
   3  * Classes to show various lists of changes:
   4  * - watchlist
   5  * - related changes
   6  * - recent changes
   7  *
   8  * @file
   9  */
  10
  11 /**
  12  * @todo document
  13  */
  14 class RCCacheEntry extends RecentChange {
  15         var $secureName, $link;
  16         var $curlink , $difflink, $lastlink, $usertalklink, $versionlink;
  17         var $userlink, $timestamp, $watched;
  18
  19         /**
  20          * @param $rc RecentChange
  21          * @return RCCacheEntry
  22          */
  23         static function newFromParent( $rc ) {
  24                 $rc2 = new RCCacheEntry;
  25                 $rc2->mAttribs = $rc->mAttribs;
  26                 $rc2->mExtra = $rc->mExtra;
  27                 return $rc2;
  28         }
  29 }
  30
  31 /**
  32  * Base class for all changes lists
  33  */
  34 class ChangesList extends ContextSource {
  35
  36         /**
  37          * @var Skin
  38          */
  39         public $skin;
  40
  41         protected $watchlist = false;
  42
  43         protected $message;
  44
  45         /**
  46          * Changeslist contructor
  47          *
  48          * @param $obj Skin or IContextSource
  49          */
  50         public function __construct( $obj ) {
  51                 if ( $obj instanceof IContextSource ) {
  52                         $this->setContext( $obj );
  53                         $this->skin = $obj->getSkin();
  54                 } else {
  55                         $this->setContext( $obj->getContext() );
  56                         $this->skin = $obj;
  57                 }
  58                 $this->preCacheMessages();
  59         }
  60
  61         /**
  62          * Fetch an appropriate changes list class for the main context
  63          * This first argument used to be an User object.
  64          *
  65          * @deprecated in 1.18; use newFromContext() instead
  66          * @param $unused Unused
  67          * @return ChangesList|EnhancedChangesList|OldChangesList derivative
  68          */
  69         public static function newFromUser( $unused ) {
  70                 wfDeprecated( __METHOD__, '1.18' );
  71                 return self::newFromContext( RequestContext::getMain() );
  72         }
  73
  74         /**
  75          * Fetch an appropriate changes list class for the specified context
  76          * Some users might want to use an enhanced list format, for instance
  77          *
  78          * @param $context IContextSource to use
  79          * @return ChangesList|EnhancedChangesList|OldChangesList derivative
  80          */
  81         public static function newFromContext( IContextSource $context ) {
  82                 $user = $context->getUser();
  83                 $sk = $context->getSkin();
  84                 $list = null;
  85                 if( wfRunHooks( 'FetchChangesList', array( $user, &$sk, &$list ) ) ) {
  86                         $new = $context->getRequest()->getBool( 'enhanced', $user->getOption( 'usenewrc' ) );
  87                         return $new ? new EnhancedChangesList( $context ) : new OldChangesList( $context );
  88                 } else {
  89                         return $list;
  90                 }
  91         }
  92
  93         /**
  94          * Sets the list to use a <li class="watchlist-(namespace)-(page)"> tag
  95          * @param $value Boolean
  96          */
  97         public function setWatchlistDivs( $value = true ) {
  98                 $this->watchlist = $value;
  99         }
 100
 101         /**
 102          * As we use the same small set of messages in various methods and that
 103          * they are called often, we call them once and save them in $this->message
 104          */
 105         private function preCacheMessages() {
 106                 if( !isset( $this->message ) ) {
 107                         foreach ( explode( ' ', 'cur diff hist last blocklink history ' .
 108                         'semicolon-separator pipe-separator' ) as $msg ) {
 109                                 $this->message[$msg] = wfMsgExt( $msg, array( 'escapenoentities' ) );
 110                         }
 111                 }
 112         }
 113
 114         /**
 115          * Returns the appropriate flags for new page, minor change and patrolling
 116          * @param $flags Array Associative array of 'flag' => Bool
 117          * @param $nothing String to use for empty space
 118          * @return String
 119          */
 120         protected function recentChangesFlags( $flags, $nothing = '&#160;' ) {
 121                 $f = '';
 122                 foreach( array( 'newpage', 'minor', 'bot', 'unpatrolled' ) as $flag ){
 123                         $f .= isset( $flags[$flag] ) && $flags[$flag]
 124                                 ? self::flag( $flag )
 125                                 : $nothing;
 126                 }
 127                 return $f;
 128         }
 129
 130         /**
 131          * Provide the <abbr> element appropriate to a given abbreviated flag,
 132          * namely the flag indicating a new page, a minor edit, a bot edit, or an
 133          * unpatrolled edit.  By default in English it will contain "N", "m", "b",
 134          * "!" respectively, plus it will have an appropriate title and class.
 135          *
 136          * @param $flag String: 'newpage', 'unpatrolled', 'minor', or 'bot'
 137          * @return String: Raw HTML
 138          */
 139         public static function flag( $flag ) {
 140                 static $messages = null;
 141                 if ( is_null( $messages ) ) {
 142                         $messages = array(
 143                                 'newpage' => array( 'newpageletter', 'recentchanges-label-newpage' ),
 144                                 'minoredit' => array( 'minoreditletter', 'recentchanges-label-minor' ),
 145                                 'botedit' => array( 'boteditletter', 'recentchanges-label-bot' ),
 146                                 'unpatrolled' => array( 'unpatrolledletter', 'recentchanges-label-unpatrolled' ),
 147                         );
 148                         foreach( $messages as &$value ) {
 149                                 $value[0] = wfMsgExt( $value[0], 'escapenoentities' );
 150                                 $value[1] = wfMsgExt( $value[1], 'escapenoentities' );
 151                         }
 152                 }
 153
 154                 # Inconsistent naming, bleh
 155                 $map = array(
 156                         'newpage' => 'newpage',
 157                         'minor' => 'minoredit',
 158                         'bot' => 'botedit',
 159                         'unpatrolled' => 'unpatrolled',
 160                         'minoredit' => 'minoredit',
 161                         'botedit' => 'botedit',
 162                 );
 163                 $flag = $map[$flag];
 164
 165                 return "<abbr class='$flag' title='" . $messages[$flag][1] . "'>" . $messages[$flag][0] . '</abbr>';
 166         }
 167
 168         /**
 169          * Returns text for the start of the tabular part of RC
 170          * @return String
 171          */
 172         public function beginRecentChangesList() {
 173                 $this->rc_cache = array();
 174                 $this->rcMoveIndex = 0;
 175                 $this->rcCacheIndex = 0;
 176                 $this->lastdate = '';
 177                 $this->rclistOpen = false;
 178                 return '';
 179         }
 180
 181         /**
 182          * Show formatted char difference
 183          * @param $old Integer: bytes
 184          * @param $new Integer: bytes
 185          * @return String
 186          */
 187         public static function showCharacterDifference( $old, $new ) {
 188                 global $wgRCChangedSizeThreshold, $wgLang, $wgMiserMode;
 189                 $szdiff = $new - $old;
 190
 191                 $code = $wgLang->getCode();
 192                 static $fastCharDiff = array();
 193                 if ( !isset($fastCharDiff[$code]) ) {
 194                         $fastCharDiff[$code] = $wgMiserMode || wfMsgNoTrans( 'rc-change-size' ) === '$1';
 195                 }
 196
 197                 $formattedSize = $wgLang->formatNum($szdiff);
 198
 199                 if ( !$fastCharDiff[$code] ) {
 200                         $formattedSize = wfMsgExt( 'rc-change-size', array( 'parsemag' ), $formattedSize );
 201                 }
 202
 203                 if( abs( $szdiff ) > abs( $wgRCChangedSizeThreshold ) ) {
 204                         $tag = 'strong';
 205                 } else {
 206                         $tag = 'span';
 207                 }
 208
 209                 if ( $szdiff === 0 ) {
 210                         $formattedSizeClass = 'mw-plusminus-null';
 211                 }
 212                 if ( $szdiff > 0 ) {
 213                         $formattedSize = '+' . $formattedSize;
 214                         $formattedSizeClass = 'mw-plusminus-pos';
 215                 }
 216                 if ( $szdiff < 0 ) {
 217                         $formattedSizeClass = 'mw-plusminus-neg';
 218                 }
 219
 220                 $formattedTotalSize = wfMsgExt( 'rc-change-size-new', 'parsemag', $wgLang->formatNum( $new ) );
 221
 222                 return Html::element( $tag,
 223                         array( 'dir' => 'ltr', 'class' => $formattedSizeClass, 'title' => $formattedTotalSize ),
 224                         wfMessage( 'parentheses', $formattedSize )->plain() ) . $wgLang->getDirMark();
 225         }
 226
 227         /**
 228          * Returns text for the end of RC
 229          * @return String
 230          */
 231         public function endRecentChangesList() {
 232                 if( $this->rclistOpen ) {
 233                         return "</ul>\n";
 234                 } else {
 235                         return '';
 236                 }
 237         }
 238
 239         public function insertDateHeader( &$s, $rc_timestamp ) {
 240                 # Make date header if necessary
 241                 $date = $this->getLanguage()->date( $rc_timestamp, true, true );
 242                 if( $date != $this->lastdate ) {
 243                         if( $this->lastdate != '' ) {
 244                                 $s .= "</ul>\n";
 245                         }
 246                         $s .= Xml::element( 'h4', null, $date ) . "\n<ul class=\"special\">";
 247                         $this->lastdate = $date;
 248                         $this->rclistOpen = true;
 249                 }
 250         }
 251
 252         public function insertLog( &$s, $title, $logtype ) {
 253                 $page = new LogPage( $logtype );
 254                 $logname = $page->getName()->escaped();
 255                 $s .= '(' . Linker::linkKnown( $title, $logname ) . ')';
 256         }
 257
 258         /**
 259          * @param $s
 260          * @param $rc RecentChange
 261          * @param $unpatrolled
 262          */
 263         public function insertDiffHist( &$s, &$rc, $unpatrolled ) {
 264                 # Diff link
 265                 if( $rc->mAttribs['rc_type'] == RC_NEW || $rc->mAttribs['rc_type'] == RC_LOG ) {
 266                         $diffLink = $this->message['diff'];
 267                 } elseif ( !self::userCan( $rc, Revision::DELETED_TEXT, $this->getUser() ) ) {
 268                         $diffLink = $this->message['diff'];
 269                 } else {
 270                         $query = array(
 271                                 'curid' => $rc->mAttribs['rc_cur_id'],
 272                                 'diff'  => $rc->mAttribs['rc_this_oldid'],
 273                                 'oldid' => $rc->mAttribs['rc_last_oldid']
 274                         );
 275
 276                         if( $unpatrolled ) {
 277                                 $query['rcid'] = $rc->mAttribs['rc_id'];
 278                         };
 279
 280                         $diffLink = Linker::linkKnown(
 281                                 $rc->getTitle(),
 282                                 $this->message['diff'],
 283                                 array( 'tabindex' => $rc->counter ),
 284                                 $query
 285                         );
 286                 }
 287                 $s .= '(' . $diffLink . $this->message['pipe-separator'];
 288                 # History link
 289                 $s .= Linker::linkKnown(
 290                         $rc->getTitle(),
 291                         $this->message['hist'],
 292                         array(),
 293                         array(
 294                                 'curid' => $rc->mAttribs['rc_cur_id'],
 295                                 'action' => 'history'
 296                         )
 297                 );
 298                 $s .= ') . . ';
 299         }
 300
 301         /**
 302          * @param $s
 303          * @param $rc RecentChange
 304          * @param $unpatrolled
 305          * @param $watched
 306          */
 307         public function insertArticleLink( &$s, &$rc, $unpatrolled, $watched ) {
 308                 # If it's a new article, there is no diff link, but if it hasn't been
 309                 # patrolled yet, we need to give users a way to do so
 310                 $params = array();
 311
 312                 if ( $unpatrolled && $rc->mAttribs['rc_type'] == RC_NEW ) {
 313                         $params['rcid'] = $rc->mAttribs['rc_id'];
 314                 }
 315
 316                 $articlelink = Linker::linkKnown(
 317                         $rc->getTitle(),
 318                         null,
 319                         array(),
 320                         $params
 321                 );
 322                 if( $this->isDeleted($rc,Revision::DELETED_TEXT) ) {
 323                         $articlelink = '<span class="history-deleted">' . $articlelink . '</span>';
 324                 }
 325                 # Bolden pages watched by this user
 326                 if( $watched ) {
 327                         $articlelink = "<strong class=\"mw-watched\">{$articlelink}</strong>";
 328                 }
 329                 # RTL/LTR marker
 330                 $articlelink .= $this->getLanguage()->getDirMark();
 331
 332                 wfRunHooks( 'ChangesListInsertArticleLink',
 333                         array(&$this, &$articlelink, &$s, &$rc, $unpatrolled, $watched) );
 334
 335                 $s .= " $articlelink";
 336         }
 337
 338         /**
 339          * @param $s
 340          * @param $rc RecentChange
 341          */
 342         public function insertTimestamp( &$s, $rc ) {
 343                 $s .= $this->message['semicolon-separator'] .
 344                         $this->getLanguage()->time( $rc->mAttribs['rc_timestamp'], true, true ) . ' . . ';
 345         }
 346
 347         /** Insert links to user page, user talk page and eventually a blocking link
 348          *
 349          * @param $rc RecentChange
 350          */
 351         public function insertUserRelatedLinks( &$s, &$rc ) {
 352                 if( $this->isDeleted( $rc, Revision::DELETED_USER ) ) {
 353                         $s .= ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 354                 } else {
 355                         $s .= $this->getLanguage()->getDirMark() . Linker::userLink( $rc->mAttribs['rc_user'],
 356                                 $rc->mAttribs['rc_user_text'] );
 357                         $s .= Linker::userToolLinks( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 358                 }
 359         }
 360
 361         /**
 362          * insert a formatted action
 363          *
 364          * @param $rc RecentChange
 365          */
 366         public function insertLogEntry( $rc ) {
 367                 $formatter = LogFormatter::newFromRow( $rc->mAttribs );
 368                 $formatter->setShowUserToolLinks( true );
 369                 $mark = $this->getLanguage()->getDirMark();
 370                 return $formatter->getActionText() . " $mark" . $formatter->getComment();
 371         }
 372
 373         /**
 374          * Insert a formatted comment
 375          * @param $rc RecentChange
 376          */
 377         public function insertComment( $rc ) {
 378                 if( $rc->mAttribs['rc_type'] != RC_MOVE && $rc->mAttribs['rc_type'] != RC_MOVE_OVER_REDIRECT ) {
 379                         if( $this->isDeleted( $rc, Revision::DELETED_COMMENT ) ) {
 380                                 return ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-comment' ) . '</span>';
 381                         } else {
 382                                 return Linker::commentBlock( $rc->mAttribs['rc_comment'], $rc->getTitle() );
 383                         }
 384                 }
 385         }
 386
 387         /**
 388          * Check whether to enable recent changes patrol features
 389          * @return Boolean
 390          */
 391         public static function usePatrol() {
 392                 global $wgUser;
 393                 return $wgUser->useRCPatrol();
 394         }
 395
 396         /**
 397          * Returns the string which indicates the number of watching users
 398          */
 399         protected function numberofWatchingusers( $count ) {
 400                 static $cache = array();
 401                 if( $count > 0 ) {
 402                         if( !isset( $cache[$count] ) ) {
 403                                 $cache[$count] = wfMsgExt( 'number_of_watching_users_RCview',
 404                                         array('parsemag', 'escape' ), $this->getLanguage()->formatNum( $count ) );
 405                         }
 406                         return $cache[$count];
 407                 } else {
 408                         return '';
 409                 }
 410         }
 411
 412         /**
 413          * Determine if said field of a revision is hidden
 414          * @param $rc RCCacheEntry
 415          * @param $field Integer: one of DELETED_* bitfield constants
 416          * @return Boolean
 417          */
 418         public static function isDeleted( $rc, $field ) {
 419                 return ( $rc->mAttribs['rc_deleted'] & $field ) == $field;
 420         }
 421
 422         /**
 423          * Determine if the current user is allowed to view a particular
 424          * field of this revision, if it's marked as deleted.
 425          * @param $rc RCCacheEntry
 426          * @param $field Integer
 427          * @param $user User object to check, or null to use $wgUser
 428          * @return Boolean
 429          */
 430         public static function userCan( $rc, $field, User $user = null ) {
 431                 if( $rc->mAttribs['rc_type'] == RC_LOG ) {
 432                         return LogEventsList::userCanBitfield( $rc->mAttribs['rc_deleted'], $field, $user );
 433                 } else {
 434                         return Revision::userCanBitfield( $rc->mAttribs['rc_deleted'], $field, $user );
 435                 }
 436         }
 437
 438         /**
 439          * @param $link string
 440          * @param $watched bool
 441          * @return string
 442          */
 443         protected function maybeWatchedLink( $link, $watched = false ) {
 444                 if( $watched ) {
 445                         return '<strong class="mw-watched">' . $link . '</strong>';
 446                 } else {
 447                         return '<span class="mw-rc-unwatched">' . $link . '</span>';
 448                 }
 449         }
 450
 451         /** Inserts a rollback link
 452          *
 453          * @param $s string
 454          * @param $rc RecentChange
 455          */
 456         public function insertRollback( &$s, &$rc ) {
 457                 if( !$rc->mAttribs['rc_new'] && $rc->mAttribs['rc_this_oldid'] && $rc->mAttribs['rc_cur_id'] ) {
 458                         $page = $rc->getTitle();
 459                         /** Check for rollback and edit permissions, disallow special pages, and only
 460                           * show a link on the top-most revision */
 461                         if ( $this->getUser()->isAllowed('rollback') && $rc->mAttribs['page_latest'] == $rc->mAttribs['rc_this_oldid'] )
 462                         {
 463                                 $rev = new Revision( array(
 464                                         'id'        => $rc->mAttribs['rc_this_oldid'],
 465                                         'user'      => $rc->mAttribs['rc_user'],
 466                                         'user_text' => $rc->mAttribs['rc_user_text'],
 467                                         'deleted'   => $rc->mAttribs['rc_deleted']
 468                                 ) );
 469                                 $rev->setTitle( $page );
 470                                 $s .= ' '.Linker::generateRollback( $rev, $this->getContext() );
 471                         }
 472                 }
 473         }
 474
 475         /**
 476          * @param $s string
 477          * @param $rc RecentChange
 478          * @param $classes
 479          */
 480         public function insertTags( &$s, &$rc, &$classes ) {
 481                 if ( empty($rc->mAttribs['ts_tags']) )
 482                         return;
 483
 484                 list($tagSummary, $newClasses) = ChangeTags::formatSummaryRow( $rc->mAttribs['ts_tags'], 'changeslist' );
 485                 $classes = array_merge( $classes, $newClasses );
 486                 $s .= ' ' . $tagSummary;
 487         }
 488
 489         public function insertExtra( &$s, &$rc, &$classes ) {
 490                 ## Empty, used for subclassers to add anything special.
 491         }
 492
 493         protected function showAsUnpatrolled( RecentChange $rc ) {
 494                 $unpatrolled = false;
 495                 if ( !$rc->mAttribs['rc_patrolled'] ) {
 496                         if ( $this->getUser()->useRCPatrol() ) {
 497                                 $unpatrolled = true;
 498                         } elseif ( $this->getUser()->useNPPatrol() && $rc->mAttribs['rc_new'] ) {
 499                                 $unpatrolled = true;
 500                         }
 501                 }
 502                 return $unpatrolled;
 503         }
 504 }
 505
 506
 507 /**
 508  * Generate a list of changes using the good old system (no javascript)
 509  */
 510 class OldChangesList extends ChangesList {
 511         /**
 512          * Format a line using the old system (aka without any javascript).
 513          *
 514          * @param $rc RecentChange
 515          */
 516         public function recentChangesLine( &$rc, $watched = false, $linenumber = null ) {
 517                 global $wgRCShowChangedSize;
 518                 wfProfileIn( __METHOD__ );
 519
 520                 # Should patrol-related stuff be shown?
 521                 $unpatrolled = $this->showAsUnpatrolled( $rc );
 522
 523                 $dateheader = ''; // $s now contains only <li>...</li>, for hooks' convenience.
 524                 $this->insertDateHeader( $dateheader, $rc->mAttribs['rc_timestamp'] );
 525
 526                 $s = '';
 527                 $classes = array();
 528                 // use mw-line-even/mw-line-odd class only if linenumber is given (feature from bug 14468)
 529                 if( $linenumber ) {
 530                         if( $linenumber & 1 ) {
 531                                 $classes[] = 'mw-line-odd';
 532                         }
 533                         else {
 534                                 $classes[] = 'mw-line-even';
 535                         }
 536                 }
 537
 538                 // Moved pages (very very old, not supported anymore)
 539                 if( $rc->mAttribs['rc_type'] == RC_MOVE || $rc->mAttribs['rc_type'] == RC_MOVE_OVER_REDIRECT ) {
 540                 // Log entries
 541                 } elseif( $rc->mAttribs['rc_log_type'] ) {
 542                         $logtitle = SpecialPage::getTitleFor( 'Log', $rc->mAttribs['rc_log_type'] );
 543                         $this->insertLog( $s, $logtitle, $rc->mAttribs['rc_log_type'] );
 544                 // Log entries (old format) or log targets, and special pages
 545                 } elseif( $rc->mAttribs['rc_namespace'] == NS_SPECIAL ) {
 546                         list( $name, $subpage ) = SpecialPageFactory::resolveAlias( $rc->mAttribs['rc_title'] );
 547                         if( $name == 'Log' ) {
 548                                 $this->insertLog( $s, $rc->getTitle(), $subpage );
 549                         }
 550                 // Regular entries
 551                 } else {
 552                         $this->insertDiffHist( $s, $rc, $unpatrolled );
 553                         # M, N, b and ! (minor, new, bot and unpatrolled)
 554                         $s .= $this->recentChangesFlags(
 555                                 array(
 556                                         'newpage' => $rc->mAttribs['rc_new'],
 557                                         'minor' => $rc->mAttribs['rc_minor'],
 558                                         'unpatrolled' => $unpatrolled,
 559                                         'bot' => $rc->mAttribs['rc_bot']
 560                                 ),
 561                                 ''
 562                         );
 563                         $this->insertArticleLink( $s, $rc, $unpatrolled, $watched );
 564                 }
 565                 # Edit/log timestamp
 566                 $this->insertTimestamp( $s, $rc );
 567                 # Bytes added or removed
 568                 if( $wgRCShowChangedSize ) {
 569                         $cd = $rc->getCharacterDifference();
 570                         if( $cd != '' ) {
 571                                 $s .= "$cd  . . ";
 572                         }
 573                 }
 574
 575                 if ( $rc->mAttribs['rc_type'] == RC_LOG ) {
 576                         $s .= $this->insertLogEntry( $rc );
 577                 } else {
 578                         # User tool links
 579                         $this->insertUserRelatedLinks( $s, $rc );
 580                         # LTR/RTL direction mark
 581                         $s .= $this->getLanguage()->getDirMark();
 582                         $s .= $this->insertComment( $rc );
 583                 }
 584
 585                 # Tags
 586                 $this->insertTags( $s, $rc, $classes );
 587                 # Rollback
 588                 $this->insertRollback( $s, $rc );
 589                 # For subclasses
 590                 $this->insertExtra( $s, $rc, $classes );
 591
 592                 # How many users watch this page
 593                 if( $rc->numberofWatchingusers > 0 ) {
 594                         $s .= ' ' . wfMsgExt( 'number_of_watching_users_RCview',
 595                                 array( 'parsemag', 'escape' ), $this->getLanguage()->formatNum( $rc->numberofWatchingusers ) );
 596                 }
 597
 598                 if( $this->watchlist ) {
 599                         $classes[] = Sanitizer::escapeClass( 'watchlist-'.$rc->mAttribs['rc_namespace'].'-'.$rc->mAttribs['rc_title'] );
 600                 }
 601
 602                 wfRunHooks( 'OldChangesListRecentChangesLine', array(&$this, &$s, $rc) );
 603
 604                 wfProfileOut( __METHOD__ );
 605                 return "$dateheader<li class=\"".implode( ' ', $classes )."\">".$s."</li>\n";
 606         }
 607 }
 608
 609
 610 /**
 611  * Generate a list of changes using an Enhanced system (uses javascript).
 612  */
 613 class EnhancedChangesList extends ChangesList {
 614
 615         protected $rc_cache;
 616
 617         /**
 618          * Add the JavaScript file for enhanced changeslist
 619          * @return String
 620          */
 621         public function beginRecentChangesList() {
 622                 $this->rc_cache = array();
 623                 $this->rcMoveIndex = 0;
 624                 $this->rcCacheIndex = 0;
 625                 $this->lastdate = '';
 626                 $this->rclistOpen = false;
 627                 $this->getOutput()->addModuleStyles( 'mediawiki.special.changeslist' );
 628                 return '';
 629         }
 630         /**
 631          * Format a line for enhanced recentchange (aka with javascript and block of lines).
 632          *
 633          * @param $baseRC RecentChange
 634          * @param $watched bool
 635          *
 636          * @return string
 637          */
 638         public function recentChangesLine( &$baseRC, $watched = false ) {
 639                 wfProfileIn( __METHOD__ );
 640
 641                 # Create a specialised object
 642                 $rc = RCCacheEntry::newFromParent( $baseRC );
 643
 644                 $curIdEq = array( 'curid' => $rc->mAttribs['rc_cur_id'] );
 645
 646                 # If it's a new day, add the headline and flush the cache
 647                 $date = $this->getLanguage()->date( $rc->mAttribs['rc_timestamp'], true );
 648                 $ret = '';
 649                 if( $date != $this->lastdate ) {
 650                         # Process current cache
 651                         $ret = $this->recentChangesBlock();
 652                         $this->rc_cache = array();
 653                         $ret .= Xml::element( 'h4', null, $date ) . "\n";
 654                         $this->lastdate = $date;
 655                 }
 656
 657                 # Should patrol-related stuff be shown?
 658                 $rc->unpatrolled = $this->showAsUnpatrolled( $rc );
 659
 660                 $showdifflinks = true;
 661                 # Make article link
 662                 $type = $rc->mAttribs['rc_type'];
 663                 $logType = $rc->mAttribs['rc_log_type'];
 664                 // Page moves, very old style, not supported anymore
 665                 if( $type == RC_MOVE || $type == RC_MOVE_OVER_REDIRECT ) {
 666                 // New unpatrolled pages
 667                 } elseif( $rc->unpatrolled && $type == RC_NEW ) {
 668                         $clink = Linker::linkKnown( $rc->getTitle(), null, array(),
 669                                 array( 'rcid' => $rc->mAttribs['rc_id'] ) );
 670                 // Log entries
 671                 } elseif( $type == RC_LOG ) {
 672                         if( $logType ) {
 673                                 $logtitle = SpecialPage::getTitleFor( 'Log', $logType );
 674                                 $logpage = new LogPage( $logType );
 675                                 $logname = $logpage->getName()->escaped();
 676                                 $clink = '(' . Linker::linkKnown( $logtitle, $logname ) . ')';
 677                         } else {
 678                                 $clink = Linker::link( $rc->getTitle() );
 679                         }
 680                         $watched = false;
 681                 // Log entries (old format) and special pages
 682                 } elseif( $rc->mAttribs['rc_namespace'] == NS_SPECIAL ) {
 683                         wfDebug( "Unexpected special page in recentchanges\n" );
 684                         $clink = '';
 685                 // Edits
 686                 } else {
 687                         $clink = Linker::linkKnown( $rc->getTitle() );
 688                 }
 689
 690                 # Don't show unusable diff links
 691                 if ( !ChangesList::userCan( $rc, Revision::DELETED_TEXT, $this->getUser() ) ) {
 692                         $showdifflinks = false;
 693                 }
 694
 695                 $time = $this->getLanguage()->time( $rc->mAttribs['rc_timestamp'], true, true );
 696                 $rc->watched = $watched;
 697                 $rc->link = $clink;
 698                 $rc->timestamp = $time;
 699                 $rc->numberofWatchingusers = $baseRC->numberofWatchingusers;
 700
 701                 # Make "cur" and "diff" links.  Do not use link(), it is too slow if
 702                 # called too many times (50% of CPU time on RecentChanges!).
 703                 $thisOldid = $rc->mAttribs['rc_this_oldid'];
 704                 $lastOldid = $rc->mAttribs['rc_last_oldid'];
 705                 if( $rc->unpatrolled ) {
 706                         $rcIdQuery = array( 'rcid' => $rc->mAttribs['rc_id'] );
 707                 } else {
 708                         $rcIdQuery = array();
 709                 }
 710                 $querycur = $curIdEq + array( 'diff' => '0', 'oldid' => $thisOldid );
 711                 $querydiff = $curIdEq + array( 'diff' => $thisOldid, 'oldid' =>
 712                         $lastOldid ) + $rcIdQuery;
 713
 714                 if( !$showdifflinks ) {
 715                         $curLink = $this->message['cur'];
 716                         $diffLink = $this->message['diff'];
 717                 } elseif( in_array( $type, array( RC_NEW, RC_LOG, RC_MOVE, RC_MOVE_OVER_REDIRECT ) ) ) {
 718                         if ( $type != RC_NEW ) {
 719                                 $curLink = $this->message['cur'];
 720                         } else {
 721                                 $curUrl = htmlspecialchars( $rc->getTitle()->getLinkURL( $querycur ) );
 722                                 $curLink = "<a href=\"$curUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['cur']}</a>";
 723                         }
 724                         $diffLink = $this->message['diff'];
 725                 } else {
 726                         $diffUrl = htmlspecialchars( $rc->getTitle()->getLinkURL( $querydiff ) );
 727                         $curUrl = htmlspecialchars( $rc->getTitle()->getLinkURL( $querycur ) );
 728                         $diffLink = "<a href=\"$diffUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['diff']}</a>";
 729                         $curLink = "<a href=\"$curUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['cur']}</a>";
 730                 }
 731
 732                 # Make "last" link
 733                 if( !$showdifflinks || !$lastOldid ) {
 734                         $lastLink = $this->message['last'];
 735                 } elseif( in_array( $type, array( RC_LOG, RC_MOVE, RC_MOVE_OVER_REDIRECT ) ) ) {
 736                         $lastLink = $this->message['last'];
 737                 } else {
 738                         $lastLink = Linker::linkKnown( $rc->getTitle(), $this->message['last'],
 739                                 array(), $curIdEq + array('diff' => $thisOldid, 'oldid' => $lastOldid) + $rcIdQuery );
 740                 }
 741
 742                 # Make user links
 743                 if( $this->isDeleted( $rc, Revision::DELETED_USER ) ) {
 744                         $rc->userlink = ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 745                 } else {
 746                         $rc->userlink = Linker::userLink( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 747                         $rc->usertalklink = Linker::userToolLinks( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 748                 }
 749
 750                 $rc->lastlink = $lastLink;
 751                 $rc->curlink  = $curLink;
 752                 $rc->difflink = $diffLink;
 753
 754                 # Put accumulated information into the cache, for later display
 755                 # Page moves go on their own line
 756                 $title = $rc->getTitle();
 757                 $secureName = $title->getPrefixedDBkey();
 758                 if( $type == RC_MOVE || $type == RC_MOVE_OVER_REDIRECT ) {
 759                         # Use an @ character to prevent collision with page names
 760                         $this->rc_cache['@@' . ($this->rcMoveIndex++)] = array($rc);
 761                 } else {
 762                         # Logs are grouped by type
 763                         if( $type == RC_LOG ){
 764                                 $secureName = SpecialPage::getTitleFor( 'Log', $logType )->getPrefixedDBkey();
 765                         }
 766                         if( !isset( $this->rc_cache[$secureName] ) ) {
 767                                 $this->rc_cache[$secureName] = array();
 768                         }
 769
 770                         array_push( $this->rc_cache[$secureName], $rc );
 771                 }
 772
 773                 wfProfileOut( __METHOD__ );
 774
 775                 return $ret;
 776         }
 777
 778         /**
 779          * Enhanced RC group
 780          */
 781         protected function recentChangesBlockGroup( $block ) {
 782                 global $wgRCShowChangedSize;
 783
 784                 wfProfileIn( __METHOD__ );
 785
 786                 # Add the namespace and title of the block as part of the class
 787                 if ( $block[0]->mAttribs['rc_log_type'] ) {
 788                         # Log entry
 789                         $classes = 'mw-collapsible mw-collapsed mw-enhanced-rc ' . Sanitizer::escapeClass( 'mw-changeslist-log-'
 790                                         . $block[0]->mAttribs['rc_log_type'] . '-' . $block[0]->mAttribs['rc_title'] );
 791                 } else {
 792                         $classes = 'mw-collapsible mw-collapsed mw-enhanced-rc ' . Sanitizer::escapeClass( 'mw-changeslist-ns'
 793                                         . $block[0]->mAttribs['rc_namespace'] . '-' . $block[0]->mAttribs['rc_title'] );
 794                 }
 795                 $r = Html::openElement( 'table', array( 'class' => $classes ) ) .
 796                         Html::openElement( 'tr' );
 797
 798                 # Collate list of users
 799                 $userlinks = array();
 800                 # Other properties
 801                 $unpatrolled = false;
 802                 $isnew = false;
 803                 $curId = $currentRevision = 0;
 804                 # Some catalyst variables...
 805                 $namehidden = true;
 806                 $allLogs = true;
 807                 foreach( $block as $rcObj ) {
 808                         $oldid = $rcObj->mAttribs['rc_last_oldid'];
 809                         if( $rcObj->mAttribs['rc_new'] ) {
 810                                 $isnew = true;
 811                         }
 812                         // If all log actions to this page were hidden, then don't
 813                         // give the name of the affected page for this block!
 814                         if( !$this->isDeleted( $rcObj, LogPage::DELETED_ACTION ) ) {
 815                                 $namehidden = false;
 816                         }
 817                         $u = $rcObj->userlink;
 818                         if( !isset( $userlinks[$u] ) ) {
 819                                 $userlinks[$u] = 0;
 820                         }
 821                         if( $rcObj->unpatrolled ) {
 822                                 $unpatrolled = true;
 823                         }
 824                         if( $rcObj->mAttribs['rc_type'] != RC_LOG ) {
 825                                 $allLogs = false;
 826                         }
 827                         # Get the latest entry with a page_id and oldid
 828                         # since logs may not have these.
 829                         if( !$curId && $rcObj->mAttribs['rc_cur_id'] ) {
 830                                 $curId = $rcObj->mAttribs['rc_cur_id'];
 831                         }
 832                         if( !$currentRevision && $rcObj->mAttribs['rc_this_oldid'] ) {
 833                                 $currentRevision = $rcObj->mAttribs['rc_this_oldid'];
 834                         }
 835
 836                         $bot = $rcObj->mAttribs['rc_bot'];
 837                         $userlinks[$u]++;
 838                 }
 839
 840                 # Sort the list and convert to text
 841                 krsort( $userlinks );
 842                 asort( $userlinks );
 843                 $users = array();
 844                 foreach( $userlinks as $userlink => $count) {
 845                         $text = $userlink;
 846                         $text .= $this->getLanguage()->getDirMark();
 847                         if( $count > 1 ) {
 848                                 $text .= ' (' . $this->getLanguage()->formatNum( $count ) . '×)';
 849                         }
 850                         array_push( $users, $text );
 851                 }
 852
 853                 $users = ' <span class="changedby">[' .
 854                         implode( $this->message['semicolon-separator'], $users ) . ']</span>';
 855
 856                 # Title for <a> tags
 857                 $expandTitle = htmlspecialchars( wfMsg( 'rc-enhanced-expand' ) );
 858                 $closeTitle = htmlspecialchars( wfMsg( 'rc-enhanced-hide' ) );
 859
 860                 $tl = "<span class='mw-collapsible-toggle'>"
 861                         . "<span class='mw-rc-openarrow'>"
 862                         . "<a href='#' title='$expandTitle'>{$this->sideArrow()}</a>"
 863                         . "</span><span class='mw-rc-closearrow'>"
 864                         . "<a href='#' title='$closeTitle'>{$this->downArrow()}</a>"
 865                         . "</span></span>";
 866                 $r .= "<td>$tl</td>";
 867
 868                 # Main line
 869                 $r .= '<td class="mw-enhanced-rc">' . $this->recentChangesFlags( array(
 870                         'newpage' => $isnew,
 871                         'minor' => false,
 872                         'unpatrolled' => $unpatrolled,
 873                         'bot' => $bot ,
 874                 ) );
 875
 876                 # Timestamp
 877                 $r .= '&#160;'.$block[0]->timestamp.'&#160;</td><td>';
 878
 879                 # Article link
 880                 if( $namehidden ) {
 881                         $r .= ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-event' ) . '</span>';
 882                 } elseif( $allLogs ) {
 883                         $r .= $this->maybeWatchedLink( $block[0]->link, $block[0]->watched );
 884                 } else {
 885                         $this->insertArticleLink( $r, $block[0], $block[0]->unpatrolled, $block[0]->watched );
 886                 }
 887
 888                 $r .= $this->getLanguage()->getDirMark();
 889
 890                 $queryParams['curid'] = $curId;
 891                 # Changes message
 892                 $n = count($block);
 893                 static $nchanges = array();
 894                 if ( !isset( $nchanges[$n] ) ) {
 895                         $nchanges[$n] = wfMsgExt( 'nchanges', array( 'parsemag', 'escape' ), $this->getLanguage()->formatNum( $n ) );
 896                 }
 897                 # Total change link
 898                 $r .= ' ';
 899                 if( !$allLogs ) {
 900                         $r .= '(';
 901                         if( !ChangesList::userCan( $rcObj, Revision::DELETED_TEXT, $this->getUser() ) ) {
 902                                 $r .= $nchanges[$n];
 903                         } elseif( $isnew ) {
 904                                 $r .= $nchanges[$n];
 905                         } else {
 906                                 $params = $queryParams;
 907                                 $params['diff'] = $currentRevision;
 908                                 $params['oldid'] = $oldid;
 909
 910                                 $r .= Linker::link(
 911                                         $block[0]->getTitle(),
 912                                         $nchanges[$n],
 913                                         array(),
 914                                         $params,
 915                                         array( 'known', 'noclasses' )
 916                                 );
 917                         }
 918                 }
 919
 920                 # History
 921                 if( $allLogs ) {
 922                         // don't show history link for logs
 923                 } elseif( $namehidden || !$block[0]->getTitle()->exists() ) {
 924                         $r .= $this->message['pipe-separator'] . $this->message['hist'] . ')';
 925                 } else {
 926                         $params = $queryParams;
 927                         $params['action'] = 'history';
 928
 929                         $r .= $this->message['pipe-separator'] .
 930                                 Linker::linkKnown(
 931                                         $block[0]->getTitle(),
 932                                         $this->message['hist'],
 933                                         array(),
 934                                         $params
 935                                 ) . ')';
 936                 }
 937                 $r .= ' . . ';
 938
 939                 # Character difference (does not apply if only log items)
 940                 if( $wgRCShowChangedSize && !$allLogs ) {
 941                         $last = 0;
 942                         $first = count($block) - 1;
 943                         # Some events (like logs) have an "empty" size, so we need to skip those...
 944                         while( $last < $first && $block[$last]->mAttribs['rc_new_len'] === null ) {
 945                                 $last++;
 946                         }
 947                         while( $first > $last && $block[$first]->mAttribs['rc_old_len'] === null ) {
 948                                 $first--;
 949                         }
 950                         # Get net change
 951                         $chardiff = $rcObj->getCharacterDifference( $block[$first]->mAttribs['rc_old_len'],
 952                                 $block[$last]->mAttribs['rc_new_len'] );
 953
 954                         if( $chardiff == '' ) {
 955                                 $r .= ' ';
 956                         } else {
 957                                 $r .= ' ' . $chardiff. ' . . ';
 958                         }
 959                 }
 960
 961                 $r .= $users;
 962                 $r .= $this->numberofWatchingusers($block[0]->numberofWatchingusers);
 963
 964                 # Sub-entries
 965                 foreach( $block as $rcObj ) {
 966                         # Classes to apply -- TODO implement
 967                         $classes = array();
 968                         $type = $rcObj->mAttribs['rc_type'];
 969
 970                         #$r .= '<tr><td valign="top">'.$this->spacerArrow();
 971                         $r .= '<tr><td></td><td class="mw-enhanced-rc">';
 972                         $r .= $this->recentChangesFlags( array(
 973                                 'newpage' => $rcObj->mAttribs['rc_new'],
 974                                 'minor' => $rcObj->mAttribs['rc_minor'],
 975                                 'unpatrolled' => $rcObj->unpatrolled,
 976                                 'bot' => $rcObj->mAttribs['rc_bot'],
 977                         ) );
 978                         $r .= '&#160;</td><td class="mw-enhanced-rc-nested"><span class="mw-enhanced-rc-time">';
 979
 980                         $params = $queryParams;
 981
 982                         if( $rcObj->mAttribs['rc_this_oldid'] != 0 ) {
 983                                 $params['oldid'] = $rcObj->mAttribs['rc_this_oldid'];
 984                         }
 985
 986                         # Log timestamp
 987                         if( $type == RC_LOG ) {
 988                                 $link = $rcObj->timestamp;
 989                         # Revision link
 990                         } elseif( !ChangesList::userCan( $rcObj, Revision::DELETED_TEXT, $this->getUser() ) ) {
 991                                 $link = '<span class="history-deleted">'.$rcObj->timestamp.'</span> ';
 992                         } else {
 993                                 if ( $rcObj->unpatrolled && $type == RC_NEW) {
 994                                         $params['rcid'] = $rcObj->mAttribs['rc_id'];
 995                                 }
 996
 997                                 $link = Linker::linkKnown(
 998                                                 $rcObj->getTitle(),
 999                                                 $rcObj->timestamp,
1000                                                 array(),
1001                                                 $params
1002                                         );
1003                                 if( $this->isDeleted($rcObj,Revision::DELETED_TEXT) )
1004                                         $link = '<span class="history-deleted">'.$link.'</span> ';
1005                         }
1006                         $r .= $link . '</span>';
1007
1008                         if ( !$type == RC_LOG || $type == RC_NEW ) {
1009                                 $r .= ' (';
1010                                 $r .= $rcObj->curlink;
1011                                 $r .= $this->message['pipe-separator'];
1012                                 $r .= $rcObj->lastlink;
1013                                 $r .= ')';
1014                         }
1015                         $r .= ' . . ';
1016
1017                         # Character diff
1018                         if( $wgRCShowChangedSize && $rcObj->getCharacterDifference() ) {
1019                                 $r .= $rcObj->getCharacterDifference() . ' . . ' ;
1020                         }
1021
1022                         if ( $rcObj->mAttribs['rc_type'] == RC_LOG ) {
1023                                 $r .= $this->insertLogEntry( $rcObj );
1024                         } else {
1025                                 # User links
1026                                 $r .= $rcObj->userlink;
1027                                 $r .= $rcObj->usertalklink;
1028                                 $r .= $this->insertComment( $rcObj );
1029                         }
1030
1031                         # Rollback
1032                         $this->insertRollback( $r, $rcObj );
1033                         # Tags
1034                         $this->insertTags( $r, $rcObj, $classes );
1035
1036                         $r .= "</td></tr>\n";
1037                 }
1038                 $r .= "</table>\n";
1039
1040                 $this->rcCacheIndex++;
1041
1042                 wfProfileOut( __METHOD__ );
1043
1044                 return $r;
1045         }
1046
1047         /**
1048          * Generate HTML for an arrow or placeholder graphic
1049          * @param $dir String: one of '', 'd', 'l', 'r'
1050          * @param $alt String: text
1051          * @param $title String: text
1052          * @return String: HTML <img> tag
1053          */
1054         protected function arrow( $dir, $alt='', $title='' ) {
1055                 global $wgStylePath;
1056                 $encUrl = htmlspecialchars( $wgStylePath . '/common/images/Arr_' . $dir . '.png' );
1057                 $encAlt = htmlspecialchars( $alt );
1058                 $encTitle = htmlspecialchars( $title );
1059                 return "<img src=\"$encUrl\" width=\"12\" height=\"12\" alt=\"$encAlt\" title=\"$encTitle\" />";
1060         }
1061
1062         /**
1063          * Generate HTML for a right- or left-facing arrow,
1064          * depending on language direction.
1065          * @return String: HTML <img> tag
1066          */
1067         protected function sideArrow() {
1068                 global $wgLang;
1069                 $dir = $wgLang->isRTL() ? 'l' : 'r';
1070                 return $this->arrow( $dir, '+', wfMsg( 'rc-enhanced-expand' ) );
1071         }
1072
1073         /**
1074          * Generate HTML for a down-facing arrow
1075          * depending on language direction.
1076          * @return String: HTML <img> tag
1077          */
1078         protected function downArrow() {
1079                 return $this->arrow( 'd', '-', wfMsg( 'rc-enhanced-hide' ) );
1080         }
1081
1082         /**
1083          * Generate HTML for a spacer image
1084          * @return String: HTML <img> tag
1085          */
1086         protected function spacerArrow() {
1087                 return $this->arrow( '', codepointToUtf8( 0xa0 ) ); // non-breaking space
1088         }
1089
1090         /**
1091          * Enhanced RC ungrouped line.
1092          *
1093          * @param $rcObj RecentChange
1094          * @return String: a HTML formatted line (generated using $r)
1095          */
1096         protected function recentChangesBlockLine( $rcObj ) {
1097                 global $wgRCShowChangedSize;
1098
1099                 wfProfileIn( __METHOD__ );
1100                 $query['curid'] = $rcObj->mAttribs['rc_cur_id'];
1101
1102                 $type = $rcObj->mAttribs['rc_type'];
1103                 $logType = $rcObj->mAttribs['rc_log_type'];
1104                 if( $logType ) {
1105                         # Log entry
1106                         $classes = 'mw-enhanced-rc ' . Sanitizer::escapeClass( 'mw-changeslist-log-'
1107                                         . $logType . '-' . $rcObj->mAttribs['rc_title'] );
1108                 } else {
1109                         $classes = 'mw-enhanced-rc ' . Sanitizer::escapeClass( 'mw-changeslist-ns' .
1110                                         $rcObj->mAttribs['rc_namespace'] . '-' . $rcObj->mAttribs['rc_title'] );
1111                 }
1112                 $r = Html::openElement( 'table', array( 'class' => $classes ) ) .
1113                         Html::openElement( 'tr' );
1114
1115                 $r .= '<td class="mw-enhanced-rc">' . $this->spacerArrow();
1116                 # Flag and Timestamp
1117                 if( $type == RC_MOVE || $type == RC_MOVE_OVER_REDIRECT ) {
1118                         $r .= '&#160;&#160;&#160;&#160;'; // 4 flags -> 4 spaces
1119                 } else {
1120                         $r .= $this->recentChangesFlags( array(
1121                                 'newpage' => $type == RC_NEW,
1122                                 'minor' => $rcObj->mAttribs['rc_minor'],
1123                                 'unpatrolled' => $rcObj->unpatrolled,
1124                                 'bot' => $rcObj->mAttribs['rc_bot'],
1125                         ) );
1126                 }
1127                 $r .= '&#160;'.$rcObj->timestamp.'&#160;</td><td>';
1128                 # Article or log link
1129                 if( $logType ) {
1130                         $logtitle = SpecialPage::getTitleFor( 'Log', $logType );
1131                         $logname = LogPage::logName( $logType );
1132                         $r .= '(' . Linker::linkKnown( $logtitle, htmlspecialchars( $logname ) ) . ')';
1133                 } else {
1134                         $this->insertArticleLink( $r, $rcObj, $rcObj->unpatrolled, $rcObj->watched );
1135                 }
1136                 # Diff and hist links
1137                 if ( $type != RC_LOG ) {
1138                         $r .= ' ('. $rcObj->difflink . $this->message['pipe-separator'];
1139                         $query['action'] = 'history';
1140                         $r .= Linker::linkKnown(
1141                                 $rcObj->getTitle(),
1142                                 $this->message['hist'],
1143                                 array(),
1144                                 $query
1145                         ) . ')';
1146                 }
1147                 $r .= ' . . ';
1148                 # Character diff
1149                 if( $wgRCShowChangedSize && ($cd = $rcObj->getCharacterDifference()) ) {
1150                         $r .= "$cd . . ";
1151                 }
1152
1153                 if ( $type == RC_LOG ) {
1154                         $r .= $this->insertLogEntry( $rcObj );
1155                 } else {
1156                         $r .= ' '.$rcObj->userlink . $rcObj->usertalklink;
1157                         $r .= $this->insertComment( $rcObj );
1158                         $r .= $this->insertRollback( $r, $rcObj );
1159                 }
1160
1161                 # Tags
1162                 $classes = explode( ' ', $classes );
1163                 $this->insertTags( $r, $rcObj, $classes );
1164                 # Show how many people are watching this if enabled
1165                 $r .= $this->numberofWatchingusers($rcObj->numberofWatchingusers);
1166
1167                 $r .= "</td></tr></table>\n";
1168
1169                 wfProfileOut( __METHOD__ );
1170
1171                 return $r;
1172         }
1173
1174         /**
1175          * If enhanced RC is in use, this function takes the previously cached
1176          * RC lines, arranges them, and outputs the HTML
1177          *
1178          * @return string
1179          */
1180         protected function recentChangesBlock() {
1181                 if( count ( $this->rc_cache ) == 0 ) {
1182                         return '';
1183                 }
1184
1185                 wfProfileIn( __METHOD__ );
1186
1187                 $blockOut = '';
1188                 foreach( $this->rc_cache as $block ) {
1189                         if( count( $block ) < 2 ) {
1190                                 $blockOut .= $this->recentChangesBlockLine( array_shift( $block ) );
1191                         } else {
1192                                 $blockOut .= $this->recentChangesBlockGroup( $block );
1193                         }
1194                 }
1195
1196                 wfProfileOut( __METHOD__ );
1197
1198                 return '<div>'.$blockOut.'</div>';
1199         }
1200
1201         /**
1202          * Returns text for the end of RC
1203          * If enhanced RC is in use, returns pretty much all the text
1204          * @return string
1205          */
1206         public function endRecentChangesList() {
1207                 return $this->recentChangesBlock() . parent::endRecentChangesList();
1208         }
1209
1210 }