includes/ChangesList.php

   1 <?php
   2
   3 /**
   4  * @todo document
   5  */
   6 class RCCacheEntry extends RecentChange {
   7         var $secureName, $link;
   8         var $curlink , $difflink, $lastlink, $usertalklink, $versionlink;
   9         var $userlink, $timestamp, $watched;
  10
  11         static function newFromParent( $rc ) {
  12                 $rc2 = new RCCacheEntry;
  13                 $rc2->mAttribs = $rc->mAttribs;
  14                 $rc2->mExtra = $rc->mExtra;
  15                 return $rc2;
  16         }
  17 }
  18
  19 /**
  20  * Class to show various lists of changes:
  21  * - what links here
  22  * - related changes
  23  * - recent changes
  24  */
  25 class ChangesList {
  26         # Called by history lists and recent changes
  27         public $skin;
  28         protected $watchlist = false;
  29
  30         /**
  31         * Changeslist contructor
  32         * @param Skin $skin
  33         */
  34         public function __construct( &$skin ) {
  35                 $this->skin =& $skin;
  36                 $this->preCacheMessages();
  37         }
  38
  39         /**
  40          * Fetch an appropriate changes list class for the specified user
  41          * Some users might want to use an enhanced list format, for instance
  42          *
  43          * @param $user User to fetch the list class for
  44          * @return ChangesList derivative
  45          */
  46         public static function newFromUser( &$user ) {
  47                 $sk = $user->getSkin();
  48                 $list = NULL;
  49                 if( wfRunHooks( 'FetchChangesList', array( &$user, &$sk, &$list ) ) ) {
  50                         return $user->getOption( 'usenewrc' ) ?
  51                                 new EnhancedChangesList( $sk ) : new OldChangesList( $sk );
  52                 } else {
  53                         return $list;
  54                 }
  55         }
  56
  57         /**
  58          * Sets the list to use a <li class="watchlist-(namespace)-(page)"> tag
  59          * @param bool $value
  60          */
  61         public function setWatchlistDivs( $value = true ) {
  62                 $this->watchlist = $value;
  63         }
  64
  65         /**
  66          * As we use the same small set of messages in various methods and that
  67          * they are called often, we call them once and save them in $this->message
  68          */
  69         private function preCacheMessages() {
  70                 if( !isset( $this->message ) ) {
  71                         foreach ( explode( ' ', 'cur diff hist last blocklink history ' .
  72                         'semicolon-separator pipe-separator' ) as $msg ) {
  73                                 $this->message[$msg] = wfMsgExt( $msg, array( 'escapenoentities' ) );
  74                         }
  75                 }
  76         }
  77
  78
  79         /**
  80          * Returns the appropriate flags for new page, minor change and patrolling
  81          * @param bool $new
  82          * @param bool $minor
  83          * @param bool $patrolled
  84          * @param string $nothing, string to use for empty space
  85          * @param bool $bot
  86          * @return string
  87          */
  88         protected function recentChangesFlags( $new, $minor, $patrolled, $nothing = '&nbsp;', $bot = false ) {
  89                 $f = $new ? self::flag( 'newpage' ) : $nothing;
  90                 $f .= $minor ? self::flag( 'minor' ) : $nothing;
  91                 $f .= $bot ? self::flag( 'bot' ) : $nothing;
  92                 $f .= $patrolled ? self::flag( 'unpatrolled' ) : $nothing;
  93                 return $f;
  94         }
  95
  96         /**
  97          * Provide the <abbr> element appropriate to a given abbreviated flag,
  98          * namely the flag indicating a new page, a minor edit, a bot edit, or an
  99          * unpatrolled edit.  By default in English it will contain "N", "m", "b",
 100          * "!" respectively, plus it will have an appropriate title and class.
 101          *
 102          * @param $key string 'newpage', 'unpatrolled', 'minor', or 'bot'
 103          * @return string Raw HTML
 104          */
 105         public static function flag( $key ) {
 106                 static $messages = null;
 107                 if ( is_null( $messages ) ) {
 108                         foreach ( explode( ' ', 'minoreditletter boteditletter newpageletter ' .
 109                         'unpatrolledletter recentchanges-label-minor recentchanges-label-bot ' .
 110                         'recentchanges-label-newpage recentchanges-label-unpatrolled' ) as $msg ) {
 111                                 $messages[$msg] = wfMsgExt( $msg, 'escapenoentities' );
 112                         }
 113                 }
 114                 # Inconsistent naming, bleh
 115                 if ( $key == 'newpage' || $key == 'unpatrolled' ) {
 116                         $key2 = $key;
 117                 } else {
 118                         $key2 = $key . 'edit';
 119                 }
 120                 return "<abbr class=\"$key\" title=\""
 121                         . $messages["recentchanges-label-$key"] . "\">"
 122                         . $messages["${key2}letter"]
 123                         . '</abbr>';
 124         }
 125
 126         /**
 127          * Some explanatory wrapper text for the given flag, to be used in a legend
 128          * explaining what the flags mean.  For instance, "N - new page".  See
 129          * also flag().
 130          *
 131          * @param $key string 'newpage', 'unpatrolled', 'minor', or 'bot'
 132          * @return string Raw HTML
 133          */
 134         public static function flagLegend( $key ) {
 135                 return wfMsgExt( "recentchanges-legend-$key", array( 'escapenoentities',
 136                         'replaceafter' ), self::flag( $key ) );
 137         }
 138
 139         /**
 140          * Returns text for the start of the tabular part of RC
 141          * @return string
 142          */
 143         public function beginRecentChangesList() {
 144                 $this->rc_cache = array();
 145                 $this->rcMoveIndex = 0;
 146                 $this->rcCacheIndex = 0;
 147                 $this->lastdate = '';
 148                 $this->rclistOpen = false;
 149                 return '';
 150         }
 151
 152         /**
 153          * Show formatted char difference
 154          * @param int $old bytes
 155          * @param int $new bytes
 156          * @returns string
 157          */
 158         public static function showCharacterDifference( $old, $new ) {
 159                 global $wgRCChangedSizeThreshold, $wgLang, $wgMiserMode;
 160                 $szdiff = $new - $old;
 161
 162                 $code = $wgLang->getCode();
 163                 static $fastCharDiff = array();
 164                 if ( !isset($fastCharDiff[$code]) ) {
 165                         $fastCharDiff[$code] = $wgMiserMode || wfMsgNoTrans( 'rc-change-size' ) === '$1';
 166                 }
 167
 168                 $formatedSize = $wgLang->formatNum($szdiff);
 169
 170                 if ( !$fastCharDiff[$code] ) {
 171                         $formatedSize = wfMsgExt( 'rc-change-size', array( 'parsemag', 'escape' ), $formatedSize );
 172                 }
 173
 174                 if( abs( $szdiff ) > abs( $wgRCChangedSizeThreshold ) ) {
 175                         $tag = 'strong';
 176                 } else {
 177                     $tag = 'span';
 178                 }
 179                 if( $szdiff === 0 ) {
 180                         return "<$tag class='mw-plusminus-null'>($formatedSize)</$tag>";
 181                 } elseif( $szdiff > 0 ) {
 182                         return "<$tag class='mw-plusminus-pos'>(+$formatedSize)</$tag>";
 183             } else {
 184                         return "<$tag class='mw-plusminus-neg'>($formatedSize)</$tag>";
 185                 }
 186         }
 187
 188         /**
 189          * Returns text for the end of RC
 190          * @return string
 191          */
 192         public function endRecentChangesList() {
 193                 if( $this->rclistOpen ) {
 194                         return "</ul>\n";
 195                 } else {
 196                         return '';
 197                 }
 198         }
 199
 200         protected function insertMove( &$s, $rc ) {
 201                 # Diff
 202                 $s .= '(' . $this->message['diff'] . ') (';
 203                 # Hist
 204                 $s .= $this->skin->link(
 205                         $rc->getMovedToTitle(),
 206                         $this->message['hist'],
 207                         array(),
 208                         array( 'action' => 'history' ),
 209                         array( 'known', 'noclasses' )
 210                 ) . ') . . ';
 211                 # "[[x]] moved to [[y]]"
 212                 $msg = ( $rc->mAttribs['rc_type'] == RC_MOVE ) ? '1movedto2' : '1movedto2_redir';
 213                 $s .= wfMsg(
 214                         $msg,
 215                         $this->skin->link(
 216                                 $rc->getTitle(),
 217                                 null,
 218                                 array(),
 219                                 array( 'redirect' => 'no' ),
 220                                 array( 'known', 'noclasses' )
 221                         ),
 222                         $this->skin->link(
 223                                 $rc->getMovedToTitle(),
 224                                 null,
 225                                 array(),
 226                                 array(),
 227                                 array( 'known', 'noclasses' )
 228                         )
 229                 );
 230         }
 231
 232         protected function insertDateHeader( &$s, $rc_timestamp ) {
 233                 global $wgLang;
 234                 # Make date header if necessary
 235                 $date = $wgLang->date( $rc_timestamp, true, true );
 236                 if( $date != $this->lastdate ) {
 237                         if( '' != $this->lastdate ) {
 238                                 $s .= "</ul>\n";
 239                         }
 240                         $s .= Xml::element( 'h4', null, $date ) . "\n<ul class=\"special\">";
 241                         $this->lastdate = $date;
 242                         $this->rclistOpen = true;
 243                 }
 244         }
 245
 246         protected function insertLog( &$s, $title, $logtype ) {
 247                 $logname = LogPage::logName( $logtype );
 248                 $s .= '(' . $this->skin->link(
 249                         $title,
 250                         $logname,
 251                         array(),
 252                         array(),
 253                         array( 'known', 'noclasses' )
 254                 ) . ')';
 255         }
 256
 257         protected function insertDiffHist( &$s, &$rc, $unpatrolled ) {
 258                 # Diff link
 259                 if( $rc->mAttribs['rc_type'] == RC_NEW || $rc->mAttribs['rc_type'] == RC_LOG ) {
 260                         $diffLink = $this->message['diff'];
 261                 } else if( !$this->userCan($rc,Revision::DELETED_TEXT) ) {
 262                         $diffLink = $this->message['diff'];
 263                 } else {
 264                         $query = array(
 265                                 'curid' => $rc->mAttribs['rc_cur_id'],
 266                                 'diff'  => $rc->mAttribs['rc_this_oldid'],
 267                                 'oldid' => $rc->mAttribs['rc_last_oldid']
 268                         );
 269
 270                         if( $unpatrolled ) {
 271                                 $query['rcid'] = $rc->mAttribs['rc_id'];
 272                         };
 273
 274                         $diffLink = $this->skin->link(
 275                                 $rc->getTitle(),
 276                                 $this->message['diff'],
 277                                 array( 'tabindex' => $rc->counter ),
 278                                 $query,
 279                                 array( 'known', 'noclasses' )
 280                         );
 281                 }
 282                 $s .= '('.$diffLink.') (';
 283                 # History link
 284                 $s .= $this->skin->link(
 285                         $rc->getTitle(),
 286                         $this->message['hist'],
 287                         array(),
 288                         array(
 289                                 'curid' => $rc->mAttribs['rc_cur_id'],
 290                                 'action' => 'history'
 291                         ),
 292                         array( 'known', 'noclasses' )
 293                 );
 294                 $s .= ') . . ';
 295         }
 296
 297         protected function insertArticleLink( &$s, &$rc, $unpatrolled, $watched ) {
 298                 global $wgContLang;
 299                 # If it's a new article, there is no diff link, but if it hasn't been
 300                 # patrolled yet, we need to give users a way to do so
 301                 $params = array();
 302
 303                 if ( $unpatrolled && $rc->mAttribs['rc_type'] == RC_NEW ) {
 304                         $params['rcid'] = $rc->mAttribs['rc_id'];
 305                 }
 306
 307                 if( $this->isDeleted($rc,Revision::DELETED_TEXT) ) {
 308                         $articlelink = $this->skin->link(
 309                                 $rc->getTitle(),
 310                                 null,
 311                                 array(),
 312                                 $params,
 313                                 array( 'known', 'noclasses' )
 314                         );
 315                         $articlelink = '<span class="history-deleted">' . $articlelink . '</span>';
 316                 } else {
 317                         $articlelink = ' '. $this->skin->link(
 318                                 $rc->getTitle(),
 319                                 null,
 320                                 array(),
 321                                 $params,
 322                                 array( 'known', 'noclasses' )
 323                         );
 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 .= $wgContLang->getDirMark();
 331
 332                 wfRunHooks( 'ChangesListInsertArticleLink',
 333                         array(&$this, &$articlelink, &$s, &$rc, $unpatrolled, $watched) );
 334
 335                 $s .= " $articlelink";
 336         }
 337
 338         protected function insertTimestamp( &$s, $rc ) {
 339                 global $wgLang;
 340                 $s .= $this->message['semicolon-separator'] .
 341                         $wgLang->time( $rc->mAttribs['rc_timestamp'], true, true ) . ' . . ';
 342         }
 343
 344         /** Insert links to user page, user talk page and eventually a blocking link */
 345         public function insertUserRelatedLinks( &$s, &$rc ) {
 346                 if( $this->isDeleted( $rc, Revision::DELETED_USER ) ) {
 347                    $s .= ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 348                 } else {
 349                   $s .= $this->skin->userLink( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 350                   $s .= $this->skin->userToolLinks( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 351                 }
 352         }
 353
 354         /** insert a formatted action */
 355         protected function insertAction( &$s, &$rc ) {
 356                 if( $rc->mAttribs['rc_type'] == RC_LOG ) {
 357                         if( $this->isDeleted( $rc, LogPage::DELETED_ACTION ) ) {
 358                                 $s .= ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-event' ) . '</span>';
 359                         } else {
 360                                 $s .= ' '.LogPage::actionText( $rc->mAttribs['rc_log_type'], $rc->mAttribs['rc_log_action'],
 361                                         $rc->getTitle(), $this->skin, LogPage::extractParams( $rc->mAttribs['rc_params'] ), true, true );
 362                         }
 363                 }
 364         }
 365
 366         /** insert a formatted comment */
 367         protected function insertComment( &$s, &$rc ) {
 368                 if( $rc->mAttribs['rc_type'] != RC_MOVE && $rc->mAttribs['rc_type'] != RC_MOVE_OVER_REDIRECT ) {
 369                         if( $this->isDeleted( $rc, Revision::DELETED_COMMENT ) ) {
 370                                 $s .= ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-comment' ) . '</span>';
 371                         } else {
 372                                 $s .= $this->skin->commentBlock( $rc->mAttribs['rc_comment'], $rc->getTitle() );
 373                         }
 374                 }
 375         }
 376
 377         /**
 378          * Check whether to enable recent changes patrol features
 379          * @return bool
 380          */
 381         public static function usePatrol() {
 382                 global $wgUser;
 383                 return $wgUser->useRCPatrol();
 384         }
 385
 386         /**
 387          * Returns the string which indicates the number of watching users
 388          */
 389         protected function numberofWatchingusers( $count ) {
 390                 global $wgLang;
 391                 static $cache = array();
 392                 if( $count > 0 ) {
 393                         if( !isset( $cache[$count] ) ) {
 394                                 $cache[$count] = wfMsgExt( 'number_of_watching_users_RCview',
 395                                         array('parsemag', 'escape' ), $wgLang->formatNum( $count ) );
 396                         }
 397                         return $cache[$count];
 398                 } else {
 399                         return '';
 400                 }
 401         }
 402
 403         /**
 404          * Determine if said field of a revision is hidden
 405          * @param RCCacheEntry $rc
 406          * @param int $field one of DELETED_* bitfield constants
 407          * @return bool
 408          */
 409         public static function isDeleted( $rc, $field ) {
 410                 return ( $rc->mAttribs['rc_deleted'] & $field ) == $field;
 411         }
 412
 413         /**
 414          * Determine if the current user is allowed to view a particular
 415          * field of this revision, if it's marked as deleted.
 416          * @param RCCacheEntry $rc
 417          * @param int $field
 418          * @return bool
 419          */
 420         public static function userCan( $rc, $field ) {
 421                 if( ( $rc->mAttribs['rc_deleted'] & $field ) == $field ) {
 422                         global $wgUser;
 423                         $permission = ( $rc->mAttribs['rc_deleted'] & Revision::DELETED_RESTRICTED ) == Revision::DELETED_RESTRICTED
 424                                 ? 'suppressrevision'
 425                                 : 'deleterevision';
 426                         wfDebug( "Checking for $permission due to $field match on {$rc->mAttribs['rc_deleted']}\n" );
 427                         return $wgUser->isAllowed( $permission );
 428                 } else {
 429                         return true;
 430                 }
 431         }
 432
 433         protected function maybeWatchedLink( $link, $watched = false ) {
 434                 if( $watched ) {
 435                         return '<strong class="mw-watched">' . $link . '</strong>';
 436                 } else {
 437                         return '<span class="mw-rc-unwatched">' . $link . '</span>';
 438                 }
 439         }
 440
 441         /** Inserts a rollback link */
 442         public function insertRollback( &$s, &$rc ) {
 443                 global $wgUser;
 444                 if( !$rc->mAttribs['rc_new'] && $rc->mAttribs['rc_this_oldid'] && $rc->mAttribs['rc_cur_id'] ) {
 445                         $page = $rc->getTitle();
 446                         /** Check for rollback and edit permissions, disallow special pages, and only
 447                           * show a link on the top-most revision */
 448                         if ($wgUser->isAllowed('rollback') && $rc->mAttribs['page_latest'] == $rc->mAttribs['rc_this_oldid'] )
 449                         {
 450                                 $rev = new Revision( array(
 451                                         'id'        => $rc->mAttribs['rc_this_oldid'],
 452                                         'user'      => $rc->mAttribs['rc_user'],
 453                                         'user_text' => $rc->mAttribs['rc_user_text'],
 454                                         'deleted'   => $rc->mAttribs['rc_deleted']
 455                                 ) );
 456                                 $rev->setTitle( $page );
 457                                 $s .= ' '.$this->skin->generateRollback( $rev );
 458                         }
 459                 }
 460         }
 461
 462         public function insertTags( &$s, &$rc, &$classes ) {
 463                 if ( empty($rc->mAttribs['ts_tags']) )
 464                         return;
 465
 466                 list($tagSummary, $newClasses) = ChangeTags::formatSummaryRow( $rc->mAttribs['ts_tags'], 'changeslist' );
 467                 $classes = array_merge( $classes, $newClasses );
 468                 $s .= ' ' . $tagSummary;
 469         }
 470
 471         public function insertExtra( &$s, &$rc, &$classes ) {
 472                 ## Empty, used for subclassers to add anything special.
 473         }
 474 }
 475
 476
 477 /**
 478  * Generate a list of changes using the good old system (no javascript)
 479  */
 480 class OldChangesList extends ChangesList {
 481         /**
 482          * Format a line using the old system (aka without any javascript).
 483          */
 484         public function recentChangesLine( &$rc, $watched = false, $linenumber = NULL ) {
 485                 global $wgLang, $wgRCShowChangedSize, $wgUser;
 486                 wfProfileIn( __METHOD__ );
 487                 # Should patrol-related stuff be shown?
 488                 $unpatrolled = $wgUser->useRCPatrol() && !$rc->mAttribs['rc_patrolled'];
 489
 490                 $dateheader = ''; // $s now contains only <li>...</li>, for hooks' convenience.
 491                 $this->insertDateHeader( $dateheader, $rc->mAttribs['rc_timestamp'] );
 492
 493                 $s = '';
 494                 $classes = array();
 495                 // use mw-line-even/mw-line-odd class only if linenumber is given (feature from bug 14468)
 496                 if( $linenumber ) {
 497                         if( $linenumber & 1 ) {
 498                                 $classes[] = 'mw-line-odd';
 499                         }
 500                         else {
 501                                 $classes[] = 'mw-line-even';
 502                         }
 503                 }
 504
 505                 // Moved pages
 506                 if( $rc->mAttribs['rc_type'] == RC_MOVE || $rc->mAttribs['rc_type'] == RC_MOVE_OVER_REDIRECT ) {
 507                         $this->insertMove( $s, $rc );
 508                 // Log entries
 509                 } elseif( $rc->mAttribs['rc_log_type'] ) {
 510                         $logtitle = Title::newFromText( 'Log/'.$rc->mAttribs['rc_log_type'], NS_SPECIAL );
 511                         $this->insertLog( $s, $logtitle, $rc->mAttribs['rc_log_type'] );
 512                 // Log entries (old format) or log targets, and special pages
 513                 } elseif( $rc->mAttribs['rc_namespace'] == NS_SPECIAL ) {
 514                         list( $name, $subpage ) = SpecialPage::resolveAliasWithSubpage( $rc->mAttribs['rc_title'] );
 515                         if( $name == 'Log' ) {
 516                                 $this->insertLog( $s, $rc->getTitle(), $subpage );
 517                         }
 518                 // Regular entries
 519                 } else {
 520                         $this->insertDiffHist( $s, $rc, $unpatrolled );
 521                         # M, N, b and ! (minor, new, bot and unpatrolled)
 522                         $s .= $this->recentChangesFlags( $rc->mAttribs['rc_new'], $rc->mAttribs['rc_minor'],
 523                                 $unpatrolled, '', $rc->mAttribs['rc_bot'] );
 524                         $this->insertArticleLink( $s, $rc, $unpatrolled, $watched );
 525                 }
 526                 # Edit/log timestamp
 527                 $this->insertTimestamp( $s, $rc );
 528                 # Bytes added or removed
 529                 if( $wgRCShowChangedSize ) {
 530                         $cd = $rc->getCharacterDifference();
 531                         if( $cd != '' ) {
 532                                 $s .= "$cd  . . ";
 533                         }
 534                 }
 535                 # User tool links
 536                 $this->insertUserRelatedLinks( $s, $rc );
 537                 # Log action text (if any)
 538                 $this->insertAction( $s, $rc );
 539                 # Edit or log comment
 540                 $this->insertComment( $s, $rc );
 541                 # Tags
 542                 $this->insertTags( $s, $rc, $classes );
 543                 # Rollback
 544                 $this->insertRollback( $s, $rc );
 545                 # For subclasses
 546                 $this->insertExtra( $s, $rc, $classes );
 547
 548                 # How many users watch this page
 549                 if( $rc->numberofWatchingusers > 0 ) {
 550                         $s .= ' ' . wfMsgExt( 'number_of_watching_users_RCview',
 551                                 array( 'parsemag', 'escape' ), $wgLang->formatNum( $rc->numberofWatchingusers ) );
 552                 }
 553
 554                 if( $this->watchlist ) {
 555                         $classes[] = Sanitizer::escapeClass( 'watchlist-'.$rc->mAttribs['rc_namespace'].'-'.$rc->mAttribs['rc_title'] );
 556                 }
 557
 558                 wfRunHooks( 'OldChangesListRecentChangesLine', array(&$this, &$s, $rc) );
 559
 560                 wfProfileOut( __METHOD__ );
 561                 return "$dateheader<li class=\"".implode( ' ', $classes )."\">".$s."</li>\n";
 562         }
 563 }
 564
 565
 566 /**
 567  * Generate a list of changes using an Enhanced system (uses javascript).
 568  */
 569 class EnhancedChangesList extends ChangesList {
 570         /**
 571         *  Add the JavaScript file for enhanced changeslist
 572         *  @ return string
 573         */
 574         public function beginRecentChangesList() {
 575                 global $wgStylePath, $wgJsMimeType, $wgStyleVersion;
 576                 $this->rc_cache = array();
 577                 $this->rcMoveIndex = 0;
 578                 $this->rcCacheIndex = 0;
 579                 $this->lastdate = '';
 580                 $this->rclistOpen = false;
 581                 $script = Xml::tags( 'script', array(
 582                         'type' => $wgJsMimeType,
 583                         'src' => $wgStylePath . "/common/enhancedchanges.js?$wgStyleVersion" ), '' );
 584                 return $script;
 585         }
 586         /**
 587          * Format a line for enhanced recentchange (aka with javascript and block of lines).
 588          */
 589         public function recentChangesLine( &$baseRC, $watched = false ) {
 590                 global $wgLang, $wgUser;
 591
 592                 wfProfileIn( __METHOD__ );
 593
 594                 # Create a specialised object
 595                 $rc = RCCacheEntry::newFromParent( $baseRC );
 596
 597                 # Extract fields from DB into the function scope (rc_xxxx variables)
 598                 // FIXME: Would be good to replace this extract() call with something
 599                 // that explicitly initializes variables.
 600                 extract( $rc->mAttribs );
 601                 $curIdEq = array( 'curid' => $rc_cur_id );
 602
 603                 # If it's a new day, add the headline and flush the cache
 604                 $date = $wgLang->date( $rc_timestamp, true );
 605                 $ret = '';
 606                 if( $date != $this->lastdate ) {
 607                         # Process current cache
 608                         $ret = $this->recentChangesBlock();
 609                         $this->rc_cache = array();
 610                         $ret .= Xml::element( 'h4', null, $date );
 611                         $this->lastdate = $date;
 612                 }
 613
 614                 # Should patrol-related stuff be shown?
 615                 if( $wgUser->useRCPatrol() ) {
 616                         $rc->unpatrolled = !$rc_patrolled;
 617                 } else {
 618                         $rc->unpatrolled = false;
 619                 }
 620
 621                 $showdifflinks = true;
 622                 # Make article link
 623                 // Page moves
 624                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 625                         $msg = ( $rc_type == RC_MOVE ) ? "1movedto2" : "1movedto2_redir";
 626                         $clink = wfMsg( $msg, $this->skin->linkKnown( $rc->getTitle(), null,
 627                                 array(), array( 'redirect' => 'no' ) ),
 628                                 $this->skin->linkKnown( $rc->getMovedToTitle() ) );
 629                 // New unpatrolled pages
 630                 } else if( $rc->unpatrolled && $rc_type == RC_NEW ) {
 631                         $clink = $this->skin->linkKnown( $rc->getTitle(), null, array(),
 632                                 array( 'rcid' => $rc_id ) );
 633                 // Log entries
 634                 } else if( $rc_type == RC_LOG ) {
 635                         if( $rc_log_type ) {
 636                                 $logtitle = SpecialPage::getTitleFor( 'Log', $rc_log_type );
 637                                 $clink = '(' . $this->skin->linkKnown( $logtitle,
 638                                         LogPage::logName($rc_log_type) ) . ')';
 639                         } else {
 640                                 $clink = $this->skin->link( $rc->getTitle() );
 641                         }
 642                         $watched = false;
 643                 // Log entries (old format) and special pages
 644                 } elseif( $rc_namespace == NS_SPECIAL ) {
 645                         list( $specialName, $logtype ) = SpecialPage::resolveAliasWithSubpage( $rc_title );
 646                         if ( $specialName == 'Log' ) {
 647                                 # Log updates, etc
 648                                 $logname = LogPage::logName( $logtype );
 649                                 $clink = '(' . $this->skin->linkKnown( $rc->getTitle(), $logname ) . ')';
 650                         } else {
 651                                 wfDebug( "Unexpected special page in recentchanges\n" );
 652                                 $clink = '';
 653                         }
 654                 // Edits
 655                 } else {
 656                         $clink = $this->skin->linkKnown( $rc->getTitle() );
 657                 }
 658
 659                 # Don't show unusable diff links
 660                 if ( !ChangesList::userCan($rc,Revision::DELETED_TEXT) ) {
 661                         $showdifflinks = false;
 662                 }
 663
 664                 $time = $wgLang->time( $rc_timestamp, true, true );
 665                 $rc->watched = $watched;
 666                 $rc->link = $clink;
 667                 $rc->timestamp = $time;
 668                 $rc->numberofWatchingusers = $baseRC->numberofWatchingusers;
 669
 670                 # Make "cur" and "diff" links.  Do not use link(), it is too slow if
 671                 # called too many times (50% of CPU time on RecentChanges!).
 672                 if( $rc->unpatrolled ) {
 673                         $rcIdQuery = array( 'rcid' => $rc_id );
 674                 } else {
 675                         $rcIdQuery = array();
 676                 }
 677                 $querycur = $curIdEq + array( 'diff' => '0', 'oldid' => $rc_this_oldid );
 678                 $querydiff = $curIdEq + array( 'diff' => $rc_this_oldid, 'oldid' =>
 679                         $rc_last_oldid ) + $rcIdQuery;
 680
 681                 if( !$showdifflinks ) {
 682                         $curLink = $this->message['cur'];
 683                         $diffLink = $this->message['diff'];
 684                 } else if( in_array( $rc_type, array(RC_NEW,RC_LOG,RC_MOVE,RC_MOVE_OVER_REDIRECT) ) ) {
 685                         if ( $rc_type != RC_NEW ) {
 686                                 $curLink = $this->message['cur'];
 687                         } else {
 688                                 $curUrl = htmlspecialchars( $rc->getTitle()->getLinkUrl( $querycur ) );
 689                                 $curLink = "<a href=\"$curUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['cur']}</a>";
 690                         }
 691                         $diffLink = $this->message['diff'];
 692                 } else {
 693                         $diffUrl = htmlspecialchars( $rc->getTitle()->getLinkUrl( $querydiff ) );
 694                         $curUrl = htmlspecialchars( $rc->getTitle()->getLinkUrl( $querycur ) );
 695                         $diffLink = "<a href=\"$diffUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['diff']}</a>";
 696                         $curLink = "<a href=\"$curUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['cur']}</a>";
 697                 }
 698
 699                 # Make "last" link
 700                 if( !$showdifflinks || !$rc_last_oldid ) {
 701                         $lastLink = $this->message['last'];
 702                 } else if( $rc_type == RC_LOG || $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 703                         $lastLink = $this->message['last'];
 704                 } else {
 705                         $lastLink = $this->skin->linkKnown( $rc->getTitle(), $this->message['last'],
 706                                 array(), $curIdEq + array('diff' => $rc_this_oldid, 'oldid' => $rc_last_oldid) + $rcIdQuery );
 707                 }
 708
 709                 # Make user links
 710                 if( $this->isDeleted($rc,Revision::DELETED_USER) ) {
 711                         $rc->userlink = ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 712                 } else {
 713                         $rc->userlink = $this->skin->userLink( $rc_user, $rc_user_text );
 714                         $rc->usertalklink = $this->skin->userToolLinks( $rc_user, $rc_user_text );
 715                 }
 716
 717                 $rc->lastlink = $lastLink;
 718                 $rc->curlink  = $curLink;
 719                 $rc->difflink = $diffLink;
 720
 721                 # Put accumulated information into the cache, for later display
 722                 # Page moves go on their own line
 723                 $title = $rc->getTitle();
 724                 $secureName = $title->getPrefixedDBkey();
 725                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 726                         # Use an @ character to prevent collision with page names
 727                         $this->rc_cache['@@' . ($this->rcMoveIndex++)] = array($rc);
 728                 } else {
 729                         # Logs are grouped by type
 730                         if( $rc_type == RC_LOG ){
 731                                 $secureName = SpecialPage::getTitleFor( 'Log', $rc_log_type )->getPrefixedDBkey();
 732                         }
 733                         if( !isset( $this->rc_cache[$secureName] ) ) {
 734                                 $this->rc_cache[$secureName] = array();
 735                         }
 736
 737                         array_push( $this->rc_cache[$secureName], $rc );
 738                 }
 739
 740                 wfProfileOut( __METHOD__ );
 741
 742                 return $ret;
 743         }
 744
 745         /**
 746          * Enhanced RC group
 747          */
 748         protected function recentChangesBlockGroup( $block ) {
 749                 global $wgLang, $wgContLang, $wgRCShowChangedSize;
 750
 751                 wfProfileIn( __METHOD__ );
 752
 753                 $r = '<table cellpadding="0" cellspacing="0" border="0" style="background: none"><tr>';
 754
 755                 # Collate list of users
 756                 $userlinks = array();
 757                 # Other properties
 758                 $unpatrolled = false;
 759                 $isnew = false;
 760                 $curId = $currentRevision = 0;
 761                 # Some catalyst variables...
 762                 $namehidden = true;
 763                 $allLogs = true;
 764                 foreach( $block as $rcObj ) {
 765                         $oldid = $rcObj->mAttribs['rc_last_oldid'];
 766                         if( $rcObj->mAttribs['rc_new'] ) {
 767                                 $isnew = true;
 768                         }
 769                         // If all log actions to this page were hidden, then don't
 770                         // give the name of the affected page for this block!
 771                         if( !$this->isDeleted( $rcObj, LogPage::DELETED_ACTION ) ) {
 772                                 $namehidden = false;
 773                         }
 774                         $u = $rcObj->userlink;
 775                         if( !isset( $userlinks[$u] ) ) {
 776                                 $userlinks[$u] = 0;
 777                         }
 778                         if( $rcObj->unpatrolled ) {
 779                                 $unpatrolled = true;
 780                         }
 781                         if( $rcObj->mAttribs['rc_type'] != RC_LOG ) {
 782                                 $allLogs = false;
 783                         }
 784                         # Get the latest entry with a page_id and oldid
 785                         # since logs may not have these.
 786                         if( !$curId && $rcObj->mAttribs['rc_cur_id'] ) {
 787                                 $curId = $rcObj->mAttribs['rc_cur_id'];
 788                         }
 789                         if( !$currentRevision && $rcObj->mAttribs['rc_this_oldid'] ) {
 790                                 $currentRevision = $rcObj->mAttribs['rc_this_oldid'];
 791                         }
 792
 793                         $bot = $rcObj->mAttribs['rc_bot'];
 794                         $userlinks[$u]++;
 795                 }
 796
 797                 # Sort the list and convert to text
 798                 krsort( $userlinks );
 799                 asort( $userlinks );
 800                 $users = array();
 801                 foreach( $userlinks as $userlink => $count) {
 802                         $text = $userlink;
 803                         $text .= $wgContLang->getDirMark();
 804                         if( $count > 1 ) {
 805                                 $text .= ' (' . $wgLang->formatNum( $count ) . '×)';
 806                         }
 807                         array_push( $users, $text );
 808                 }
 809
 810                 $users = ' <span class="changedby">[' .
 811                         implode( $this->message['semicolon-separator'], $users ) . ']</span>';
 812
 813                 # ID for JS visibility toggle
 814                 $jsid = $this->rcCacheIndex;
 815                 # onclick handler to toggle hidden/expanded
 816                 $toggleLink = "onclick='toggleVisibility($jsid); return false'";
 817                 # Title for <a> tags
 818                 $expandTitle = htmlspecialchars( wfMsg( 'rc-enhanced-expand' ) );
 819                 $closeTitle = htmlspecialchars( wfMsg( 'rc-enhanced-hide' ) );
 820
 821                 $tl = "<span id='mw-rc-openarrow-$jsid' class='mw-changeslist-expanded' style='visibility:hidden'><a href='#' $toggleLink title='$expandTitle'>" . $this->sideArrow() . "</a></span>";
 822                 $tl .= "<span id='mw-rc-closearrow-$jsid' class='mw-changeslist-hidden' style='display:none'><a href='#' $toggleLink title='$closeTitle'>" . $this->downArrow() . "</a></span>";
 823                 $r .= '<td valign="top" style="white-space: nowrap"><tt>'.$tl.'&nbsp;';
 824
 825                 # Main line
 826                 $r .= $this->recentChangesFlags( $isnew, false, $unpatrolled, '&nbsp;', $bot );
 827
 828                 # Timestamp
 829                 $r .= '&nbsp;'.$block[0]->timestamp.'&nbsp;</tt></td><td>';
 830
 831                 # Article link
 832                 if( $namehidden ) {
 833                         $r .= ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-event' ) . '</span>';
 834                 } else if( $allLogs ) {
 835                         $r .= $this->maybeWatchedLink( $block[0]->link, $block[0]->watched );
 836                 } else {
 837                         $this->insertArticleLink( $r, $block[0], $block[0]->unpatrolled, $block[0]->watched );
 838                 }
 839
 840                 $r .= $wgContLang->getDirMark();
 841
 842                 $queryParams['curid'] = $curId;
 843                 # Changes message
 844                 $n = count($block);
 845                 static $nchanges = array();
 846                 if ( !isset( $nchanges[$n] ) ) {
 847                         $nchanges[$n] = wfMsgExt( 'nchanges', array( 'parsemag', 'escape' ), $wgLang->formatNum( $n ) );
 848                 }
 849                 # Total change link
 850                 $r .= ' ';
 851                 if( !$allLogs ) {
 852                         $r .= '(';
 853                         if( !ChangesList::userCan( $rcObj, Revision::DELETED_TEXT ) ) {
 854                                 $r .= $nchanges[$n];
 855                         } else if( $isnew ) {
 856                                 $r .= $nchanges[$n];
 857                         } else {
 858                                 $params = $queryParams;
 859                                 $params['diff'] = $currentRevision;
 860                                 $params['oldid'] = $oldid;
 861
 862                                 $r .= $this->skin->link(
 863                                         $block[0]->getTitle(),
 864                                         $nchanges[$n],
 865                                         array(),
 866                                         $params,
 867                                         array( 'known', 'noclasses' )
 868                                 );
 869                         }
 870                 }
 871
 872                 # History
 873                 if( $allLogs ) {
 874                         // don't show history link for logs
 875                 } else if( $namehidden || !$block[0]->getTitle()->exists() ) {
 876                         $r .= $this->message['pipe-separator'] . $this->message['hist'] . ')';
 877                 } else {
 878                         $params = $queryParams;
 879                         $params['action'] = 'history';
 880
 881                         $r .= $this->message['pipe-separator'] .
 882                                 $this->skin->link(
 883                                         $block[0]->getTitle(),
 884                                         $this->message['hist'],
 885                                         array(),
 886                                         $params,
 887                                         array( 'known', 'noclasses' )
 888                                 ) . ')';
 889                 }
 890                 $r .= ' . . ';
 891
 892                 # Character difference (does not apply if only log items)
 893                 if( $wgRCShowChangedSize && !$allLogs ) {
 894                         $last = 0;
 895                         $first = count($block) - 1;
 896                         # Some events (like logs) have an "empty" size, so we need to skip those...
 897                         while( $last < $first && $block[$last]->mAttribs['rc_new_len'] === NULL ) {
 898                                 $last++;
 899                         }
 900                         while( $first > $last && $block[$first]->mAttribs['rc_old_len'] === NULL ) {
 901                                 $first--;
 902                         }
 903                         # Get net change
 904                         $chardiff = $rcObj->getCharacterDifference( $block[$first]->mAttribs['rc_old_len'],
 905                                 $block[$last]->mAttribs['rc_new_len'] );
 906
 907                         if( $chardiff == '' ) {
 908                                 $r .= ' ';
 909                         } else {
 910                                 $r .= ' ' . $chardiff. ' . . ';
 911                         }
 912                 }
 913
 914                 $r .= $users;
 915                 $r .= $this->numberofWatchingusers($block[0]->numberofWatchingusers);
 916
 917                 $r .= "</td></tr></table>\n";
 918
 919                 # Sub-entries
 920                 $r .= '<div id="mw-rc-subentries-'.$jsid.'" class="mw-changeslist-hidden">';
 921                 $r .= '<table cellpadding="0" cellspacing="0"  border="0" style="background: none">';
 922                 foreach( $block as $rcObj ) {
 923                         # Extract fields from DB into the function scope (rc_xxxx variables)
 924                         // FIXME: Would be good to replace this extract() call with something
 925                         // that explicitly initializes variables.
 926                         # Classes to apply -- TODO implement
 927                         $classes = array();
 928                         extract( $rcObj->mAttribs );
 929
 930                         #$r .= '<tr><td valign="top">'.$this->spacerArrow();
 931                         $r .= '<tr><td valign="top">';
 932                         $r .= '<tt>'.$this->spacerIndent() . $this->spacerIndent();
 933                         $r .= $this->recentChangesFlags( $rc_new, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot );
 934                         $r .= '&nbsp;</tt></td><td valign="top">';
 935
 936                         $params = $queryParams;
 937
 938                         if( $rc_this_oldid != 0 ) {
 939                                 $params['oldid'] = $rc_this_oldid;
 940                         }
 941
 942                         # Log timestamp
 943                         if( $rc_type == RC_LOG ) {
 944                                 $link = '<tt>'.$rcObj->timestamp.'</tt> ';
 945                         # Revision link
 946                         } else if( !ChangesList::userCan($rcObj,Revision::DELETED_TEXT) ) {
 947                                 $link = '<span class="history-deleted"><tt>'.$rcObj->timestamp.'</tt></span> ';
 948                         } else {
 949                                 if ( $rcObj->unpatrolled && $rc_type == RC_NEW) {
 950                                         $params['rcid'] = $rcObj->mAttribs['rc_id'];
 951                                 }
 952
 953                                 $link = '<tt>' .
 954                                         $this->skin->link(
 955                                                 $rcObj->getTitle(),
 956                                                 $rcObj->timestamp,
 957                                                 array(),
 958                                                 $params,
 959                                                 array( 'known', 'noclasses' )
 960                                         ) . '</tt>';
 961                                 if( $this->isDeleted($rcObj,Revision::DELETED_TEXT) )
 962                                         $link = '<span class="history-deleted">'.$link.'</span> ';
 963                         }
 964                         $r .= $link;
 965
 966                         if ( !$rc_type == RC_LOG || $rc_type == RC_NEW ) {
 967                                 $r .= ' (';
 968                                 $r .= $rcObj->curlink;
 969                                 $r .= $this->message['pipe-separator'];
 970                                 $r .= $rcObj->lastlink;
 971                                 $r .= ')';
 972                         }
 973                         $r .= ' . . ';
 974
 975                         # Character diff
 976                         if( $wgRCShowChangedSize ) {
 977                                 $r .= ( $rcObj->getCharacterDifference() == '' ? '' : $rcObj->getCharacterDifference() . ' . . ' ) ;
 978                         }
 979                         # User links
 980                         $r .= $rcObj->userlink;
 981                         $r .= $rcObj->usertalklink;
 982                         // log action
 983                         $this->insertAction( $r, $rcObj );
 984                         // log comment
 985                         $this->insertComment( $r, $rcObj );
 986                         # Rollback
 987                         $this->insertRollback( $r, $rcObj );
 988                         # Tags
 989                         $this->insertTags( $r, $rcObj, $classes );
 990
 991                         $r .= "</td></tr>\n";
 992                 }
 993                 $r .= "</table></div>\n";
 994
 995                 $this->rcCacheIndex++;
 996
 997                 wfProfileOut( __METHOD__ );
 998
 999                 return $r;
1000         }
1001
1002         /**
1003          * Generate HTML for an arrow or placeholder graphic
1004          * @param string $dir one of '', 'd', 'l', 'r'
1005          * @param string $alt text
1006          * @param string $title text
1007          * @return string HTML <img> tag
1008          */
1009         protected function arrow( $dir, $alt='', $title='' ) {
1010                 global $wgStylePath;
1011                 $encUrl = htmlspecialchars( $wgStylePath . '/common/images/Arr_' . $dir . '.png' );
1012                 $encAlt = htmlspecialchars( $alt );
1013                 $encTitle = htmlspecialchars( $title );
1014                 return "<img src=\"$encUrl\" width=\"12\" height=\"12\" alt=\"$encAlt\" title=\"$encTitle\" />";
1015         }
1016
1017         /**
1018          * Generate HTML for a right- or left-facing arrow,
1019          * depending on language direction.
1020          * @return string HTML <img> tag
1021          */
1022         protected function sideArrow() {
1023                 global $wgContLang;
1024                 $dir = $wgContLang->isRTL() ? 'l' : 'r';
1025                 return $this->arrow( $dir, '+', wfMsg( 'rc-enhanced-expand' ) );
1026         }
1027
1028         /**
1029          * Generate HTML for a down-facing arrow
1030          * depending on language direction.
1031          * @return string HTML <img> tag
1032          */
1033         protected function downArrow() {
1034                 return $this->arrow( 'd', '-', wfMsg( 'rc-enhanced-hide' ) );
1035         }
1036
1037         /**
1038          * Generate HTML for a spacer image
1039          * @return string HTML <img> tag
1040          */
1041         protected function spacerArrow() {
1042                 return $this->arrow( '', codepointToUtf8( 0xa0 ) ); // non-breaking space
1043         }
1044
1045         /**
1046          * Add a set of spaces
1047          * @return string HTML <td> tag
1048          */
1049         protected function spacerIndent() {
1050                 return '&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;';
1051         }
1052
1053         /**
1054          * Enhanced RC ungrouped line.
1055          * @return string a HTML formated line (generated using $r)
1056          */
1057         protected function recentChangesBlockLine( $rcObj ) {
1058                 global $wgRCShowChangedSize;
1059
1060                 wfProfileIn( __METHOD__ );
1061
1062                 # Extract fields from DB into the function scope (rc_xxxx variables)
1063                 // FIXME: Would be good to replace this extract() call with something
1064                 // that explicitly initializes variables.
1065                 $classes = array(); // TODO implement
1066                 extract( $rcObj->mAttribs );
1067                 $query['curid'] = $rc_cur_id;
1068
1069                 $r = '<table cellspacing="0" cellpadding="0" border="0" style="background: none"><tr>';
1070                 $r .= '<td valign="top" style="white-space: nowrap"><tt>' . $this->spacerArrow() . '&nbsp;';
1071                 # Flag and Timestamp
1072                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
1073                         $r .= '&nbsp;&nbsp;&nbsp;&nbsp;'; // 4 flags -> 4 spaces
1074                 } else {
1075                         $r .= $this->recentChangesFlags( $rc_type == RC_NEW, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot );
1076                 }
1077                 $r .= '&nbsp;'.$rcObj->timestamp.'&nbsp;</tt></td><td>';
1078                 # Article or log link
1079                 if( $rc_log_type ) {
1080                         $logtitle = Title::newFromText( "Log/$rc_log_type", NS_SPECIAL );
1081                         $logname = LogPage::logName( $rc_log_type );
1082                         $r .= '(' . $this->skin->link(
1083                                 $logtitle,
1084                                 $logname,
1085                                 array(),
1086                                 array(),
1087                                 array( 'known', 'noclasses' )
1088                         ) . ')';
1089                 } else {
1090                         $this->insertArticleLink( $r, $rcObj, $rcObj->unpatrolled, $rcObj->watched );
1091                 }
1092                 # Diff and hist links
1093                 if ( $rc_type != RC_LOG ) {
1094                         $r .= ' ('. $rcObj->difflink . $this->message['pipe-separator'];
1095                         $query['action'] = 'history';
1096                         $r .= $this->skin->link(
1097                                 $rcObj->getTitle(),
1098                                 $this->message['hist'],
1099                                 array(),
1100                                 $query,
1101                                 array( 'known', 'noclasses' )
1102                         ) . ')';
1103                 }
1104                 $r .= ' . . ';
1105                 # Character diff
1106                 if( $wgRCShowChangedSize && ($cd = $rcObj->getCharacterDifference()) ) {
1107                         $r .= "$cd . . ";
1108                 }
1109                 # User/talk
1110                 $r .= ' '.$rcObj->userlink . $rcObj->usertalklink;
1111                 # Log action (if any)
1112                 if( $rc_log_type ) {
1113                         if( $this->isDeleted($rcObj,LogPage::DELETED_ACTION) ) {
1114                                 $r .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
1115                         } else {
1116                                 $r .= ' ' . LogPage::actionText( $rc_log_type, $rc_log_action, $rcObj->getTitle(),
1117                                         $this->skin, LogPage::extractParams($rc_params), true, true );
1118                         }
1119                 }
1120                 $this->insertComment( $r, $rcObj );
1121                 $this->insertRollback( $r, $rcObj );
1122                 # Tags
1123                 $this->insertTags( $r, $rcObj, $classes );
1124                 # Show how many people are watching this if enabled
1125                 $r .= $this->numberofWatchingusers($rcObj->numberofWatchingusers);
1126
1127                 $r .= "</td></tr></table>\n";
1128
1129                 wfProfileOut( __METHOD__ );
1130
1131                 return $r;
1132         }
1133
1134         /**
1135          * If enhanced RC is in use, this function takes the previously cached
1136          * RC lines, arranges them, and outputs the HTML
1137          */
1138         protected function recentChangesBlock() {
1139                 if( count ( $this->rc_cache ) == 0 ) {
1140                         return '';
1141                 }
1142
1143                 wfProfileIn( __METHOD__ );
1144
1145                 $blockOut = '';
1146                 foreach( $this->rc_cache as $block ) {
1147                         if( count( $block ) < 2 ) {
1148                                 $blockOut .= $this->recentChangesBlockLine( array_shift( $block ) );
1149                         } else {
1150                                 $blockOut .= $this->recentChangesBlockGroup( $block );
1151                         }
1152                 }
1153
1154                 wfProfileOut( __METHOD__ );
1155
1156                 return '<div>'.$blockOut.'</div>';
1157         }
1158
1159         /**
1160          * Returns text for the end of RC
1161          * If enhanced RC is in use, returns pretty much all the text
1162          */
1163         public function endRecentChangesList() {
1164                 return $this->recentChangesBlock() . parent::endRecentChangesList();
1165         }
1166
1167 }