includes/ChangesList.php

   1 <?php
   2
   3 /**
   4  * @todo document
   5  */
   6 class RCCacheEntry extends RecentChange
   7 {
   8         var $secureName, $link;
   9         var $curlink , $difflink, $lastlink , $usertalklink , $versionlink ;
  10         var $userlink, $timestamp, $watched;
  11
  12         static function newFromParent( $rc ) {
  13                 $rc2 = new RCCacheEntry;
  14                 $rc2->mAttribs = $rc->mAttribs;
  15                 $rc2->mExtra = $rc->mExtra;
  16                 return $rc2;
  17         }
  18 } ;
  19
  20 /**
  21  * Class to show various lists of changes:
  22  * - what links here
  23  * - related changes
  24  * - recent changes
  25  */
  26 class ChangesList {
  27         # Called by history lists and recent changes
  28         #
  29
  30         /**
  31         * Changeslist contructor
  32         * @param Skin $skin
  33         */
  34         function __construct( &$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' ) ? new EnhancedChangesList( $sk ) : new OldChangesList( $sk );
  51                 } else {
  52                         return $list;
  53                 }
  54         }
  55
  56         /**
  57          * As we use the same small set of messages in various methods and that
  58          * they are called often, we call them once and save them in $this->message
  59          */
  60         private function preCacheMessages() {
  61                 // Precache various messages
  62                 if( !isset( $this->message ) ) {
  63                         foreach( explode(' ', 'cur diff hist minoreditletter newpageletter last '.
  64                                 'blocklink history boteditletter semicolon-separator' ) as $msg ) {
  65                                 $this->message[$msg] = wfMsgExt( $msg, array( 'escapenoentities' ) );
  66                         }
  67                 }
  68         }
  69
  70
  71         /**
  72          * Returns the appropriate flags for new page, minor change and patrolling
  73          * @param bool $new
  74          * @param bool $minor
  75          * @param bool $patrolled
  76          * @param string $nothing, string to use for empty space
  77          * @param bool $bot
  78          * @return string
  79          */
  80         protected function recentChangesFlags( $new, $minor, $patrolled, $nothing = '&nbsp;', $bot = false ) {
  81                 $f = $new ? '<span class="newpage">' . $this->message['newpageletter'] . '</span>'
  82                                 : $nothing;
  83                 $f .= $minor ? '<span class="minor">' . $this->message['minoreditletter'] . '</span>'
  84                                 : $nothing;
  85                 $f .= $bot ? '<span class="bot">' . $this->message['boteditletter'] . '</span>' : $nothing;
  86                 $f .= $patrolled ? '<span class="unpatrolled">!</span>' : $nothing;
  87                 return $f;
  88         }
  89
  90         /**
  91          * Returns text for the start of the tabular part of RC
  92          * @return string
  93          */
  94         public function beginRecentChangesList() {
  95                 $this->rc_cache = array();
  96                 $this->rcMoveIndex = 0;
  97                 $this->rcCacheIndex = 0;
  98                 $this->lastdate = '';
  99                 $this->rclistOpen = false;
 100                 return '';
 101         }
 102
 103         /**
 104          * Returns text for the end of RC
 105          * @return string
 106          */
 107         public function endRecentChangesList() {
 108                 if( $this->rclistOpen ) {
 109                         return "</ul>\n";
 110                 } else {
 111                         return '';
 112                 }
 113         }
 114
 115         protected function insertMove( &$s, $rc ) {
 116                 # Diff
 117                 $s .= '(' . $this->message['diff'] . ') (';
 118                 # Hist
 119                 $s .= $this->skin->makeKnownLinkObj( $rc->getMovedToTitle(), $this->message['hist'], 'action=history' ) .
 120                         ') . . ';
 121
 122                 # "[[x]] moved to [[y]]"
 123                 $msg = ( $rc->mAttribs['rc_type'] == RC_MOVE ) ? '1movedto2' : '1movedto2_redir';
 124                 $s .= wfMsg( $msg, $this->skin->makeKnownLinkObj( $rc->getTitle(), '', 'redirect=no', '', '', '', 'class="mw-redirect"' ),
 125                         $this->skin->makeKnownLinkObj( $rc->getMovedToTitle(), '' ) );
 126         }
 127
 128         protected function insertDateHeader(&$s, $rc_timestamp) {
 129                 global $wgLang;
 130
 131                 # Make date header if necessary
 132                 $date = $wgLang->date( $rc_timestamp, true, true );
 133                 $s = '';
 134                 if( $date != $this->lastdate ) {
 135                         if( '' != $this->lastdate ) {
 136                                 $s .= "</ul>\n";
 137                         }
 138                         $s .= '<h4>'.$date."</h4>\n<ul class=\"special\">";
 139                         $this->lastdate = $date;
 140                         $this->rclistOpen = true;
 141                 }
 142         }
 143
 144         protected function insertLog(&$s, $title, $logtype) {
 145                 $logname = LogPage::logName( $logtype );
 146                 $s .= '(' . $this->skin->makeKnownLinkObj($title, $logname ) . ')';
 147         }
 148
 149         protected function insertDiffHist(&$s, &$rc, $unpatrolled) {
 150                 # Diff link
 151                 if( !$this->userCan($rc,Revision::DELETED_TEXT) ) {
 152                         $diffLink = $this->message['diff'];
 153                 } else if( $rc->mAttribs['rc_type'] == RC_NEW || $rc->mAttribs['rc_type'] == RC_LOG ) {
 154                         $diffLink = $this->message['diff'];
 155                 } else {
 156                         $rcidparam = $unpatrolled
 157                                 ? array( 'rcid' => $rc->mAttribs['rc_id'] )
 158                                 : array();
 159                         $diffLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['diff'],
 160                                 wfArrayToCGI( array(
 161                                         'curid' => $rc->mAttribs['rc_cur_id'],
 162                                         'diff'  => $rc->mAttribs['rc_this_oldid'],
 163                                         'oldid' => $rc->mAttribs['rc_last_oldid'] ),
 164                                         $rcidparam ),
 165                                 '', '', ' tabindex="'.$rc->counter.'"');
 166                 }
 167                 $s .= '('.$diffLink.') (';
 168
 169                 # History link
 170                 $s .= $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['hist'],
 171                         wfArrayToCGI( array(
 172                                 'curid' => $rc->mAttribs['rc_cur_id'],
 173                                 'action' => 'history' ) ) );
 174                 $s .= ') . . ';
 175         }
 176
 177         protected function insertArticleLink(&$s, &$rc, $unpatrolled, $watched) {
 178                 # Article link
 179                 # If it's a new article, there is no diff link, but if it hasn't been
 180                 # patrolled yet, we need to give users a way to do so
 181                 $params = ( $unpatrolled && $rc->mAttribs['rc_type'] == RC_NEW )
 182                         ? 'rcid='.$rc->mAttribs['rc_id']
 183                         : '';
 184                 if( $this->isDeleted($rc,Revision::DELETED_TEXT) ) {
 185                         $articlelink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '', $params );
 186                         $articlelink = '<span class="history-deleted">'.$articlelink.'</span>';
 187                 } else {
 188                     $articlelink = ' '. $this->skin->makeKnownLinkObj( $rc->getTitle(), '', $params );
 189                 }
 190                 if( $watched )
 191                         $articlelink = "<strong class=\"mw-watched\">{$articlelink}</strong>";
 192                 global $wgContLang;
 193                 $articlelink .= $wgContLang->getDirMark();
 194
 195                 wfRunHooks('ChangesListInsertArticleLink',
 196                         array(&$this, &$articlelink, &$s, &$rc, $unpatrolled, $watched));
 197
 198                 $s .= ' '.$articlelink;
 199         }
 200
 201         protected function insertTimestamp(&$s, $rc) {
 202                 global $wgLang;
 203                 # Timestamp
 204                 $s .= $this->message['semicolon-separator'] . ' ' . $wgLang->time( $rc->mAttribs['rc_timestamp'], true, true ) . ' . . ';
 205         }
 206
 207         /** Insert links to user page, user talk page and eventually a blocking link */
 208         protected function insertUserRelatedLinks(&$s, &$rc) {
 209                 if ( $this->isDeleted($rc,Revision::DELETED_USER) ) {
 210                    $s .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-user') . '</span>';
 211                 } else {
 212                   $s .= $this->skin->userLink( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 213                   $s .= $this->skin->userToolLinks( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 214                 }
 215         }
 216
 217         /** insert a formatted action */
 218         protected function insertAction(&$s, &$rc) {
 219                 # Add action
 220                 if( $rc->mAttribs['rc_type'] == RC_LOG ) {
 221                         // log action
 222                         if ( $this->isDeleted($rc,LogPage::DELETED_ACTION) ) {
 223                                 $s .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 224                         } else {
 225                                 $s .= ' ' . LogPage::actionText( $rc->mAttribs['rc_log_type'], $rc->mAttribs['rc_log_action'],
 226                                         $rc->getTitle(), $this->skin, LogPage::extractParams($rc->mAttribs['rc_params']), true, true );
 227                         }
 228                 }
 229         }
 230
 231         /** insert a formatted comment */
 232         protected function insertComment(&$s, &$rc) {
 233                 # Add comment
 234                 if( $rc->mAttribs['rc_type'] != RC_MOVE && $rc->mAttribs['rc_type'] != RC_MOVE_OVER_REDIRECT ) {
 235                         // log comment
 236                         if ( $this->isDeleted($rc,Revision::DELETED_COMMENT) ) {
 237                                 $s .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-comment') . '</span>';
 238                         } else {
 239                                 $s .= $this->skin->commentBlock( $rc->mAttribs['rc_comment'], $rc->getTitle() );
 240                         }
 241                 }
 242         }
 243
 244         /**
 245          * Check whether to enable recent changes patrol features
 246          * @return bool
 247          */
 248         public static function usePatrol() {
 249                 global $wgUser;
 250                 return $wgUser->useRCPatrol();
 251         }
 252
 253         /**
 254          * Returns the string which indicates the number of watching users
 255          */
 256         protected function numberofWatchingusers( $count ) {
 257                 global $wgLang;
 258                 static $cache = array();
 259                 if ( $count > 0 ) {
 260                         if ( !isset( $cache[$count] ) ) {
 261                                 $cache[$count] = wfMsgExt('number_of_watching_users_RCview',
 262                                         array('parsemag', 'escape'), $wgLang->formatNum($count));
 263                         }
 264                         return $cache[$count];
 265                 } else {
 266                         return '';
 267                 }
 268         }
 269
 270         /**
 271          * Determine if said field of a revision is hidden
 272          * @param RCCacheEntry $rc
 273          * @param int $field one of DELETED_* bitfield constants
 274          * @return bool
 275          */
 276         public static function isDeleted( $rc, $field ) {
 277                 return ($rc->mAttribs['rc_deleted'] & $field) == $field;
 278         }
 279
 280         /**
 281          * Determine if the current user is allowed to view a particular
 282          * field of this revision, if it's marked as deleted.
 283          * @param RCCacheEntry $rc
 284          * @param int $field
 285          * @return bool
 286          */
 287         public static function userCan( $rc, $field ) {
 288                 if( ( $rc->mAttribs['rc_deleted'] & $field ) == $field ) {
 289                         global $wgUser;
 290                         $permission = ( $rc->mAttribs['rc_deleted'] & Revision::DELETED_RESTRICTED ) == Revision::DELETED_RESTRICTED
 291                                 ? 'suppressrevision'
 292                                 : 'deleterevision';
 293                         wfDebug( "Checking for $permission due to $field match on $rc->mAttribs['rc_deleted']\n" );
 294                         return $wgUser->isAllowed( $permission );
 295                 } else {
 296                         return true;
 297                 }
 298         }
 299 }
 300
 301
 302 /**
 303  * Generate a list of changes using the good old system (no javascript)
 304  */
 305 class OldChangesList extends ChangesList {
 306         /**
 307          * Format a line using the old system (aka without any javascript).
 308          */
 309         public function recentChangesLine( &$rc, $watched = false ) {
 310                 global $wgContLang, $wgRCShowChangedSize, $wgUser;
 311
 312                 $fname = 'ChangesList::recentChangesLineOld';
 313                 wfProfileIn( $fname );
 314
 315                 # Extract DB fields into local scope
 316                 // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables.
 317                 extract( $rc->mAttribs );
 318
 319                 # Should patrol-related stuff be shown?
 320                 $unpatrolled = $wgUser->useRCPatrol() && $rc_patrolled == 0;
 321
 322                 $this->insertDateHeader($s,$rc_timestamp);
 323
 324                 $s .= '<li>';
 325
 326                 // Moved pages
 327                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 328                         $this->insertMove( $s, $rc );
 329                 // Log entries
 330                 } elseif( $rc_log_type ) {
 331                         $logtitle = Title::newFromText( "Log/$rc_log_type", NS_SPECIAL );
 332                         $this->insertLog( $s, $logtitle, $rc_log_type );
 333                 // Log entries (old format) or log targets, and special pages
 334                 } elseif( $rc_namespace == NS_SPECIAL ) {
 335                         list( $specialName, $specialSubpage ) = SpecialPage::resolveAliasWithSubpage( $rc_title );
 336                         if ( $specialName == 'Log' ) {
 337                                 $this->insertLog( $s, $rc->getTitle(), $specialSubpage );
 338                         } else {
 339                                 wfDebug( "Unexpected special page in recentchanges\n" );
 340                         }
 341                 // Regular entries
 342                 } else {
 343                         wfProfileIn($fname.'-page');
 344
 345                         $this->insertDiffHist($s, $rc, $unpatrolled);
 346
 347                         # M, N, b and ! (minor, new, bot and unpatrolled)
 348                         $s .= $this->recentChangesFlags( $rc_type == RC_NEW, $rc_minor, $unpatrolled, '', $rc_bot );
 349                         $this->insertArticleLink($s, $rc, $unpatrolled, $watched);
 350
 351                         wfProfileOut($fname.'-page');
 352                 }
 353
 354                 wfProfileIn( $fname.'-rest' );
 355
 356                 $this->insertTimestamp($s,$rc);
 357
 358                 if( $wgRCShowChangedSize ) {
 359                         $s .= ( $rc->getCharacterDifference() == '' ? '' : $rc->getCharacterDifference() . ' . . ' );
 360                 }
 361                 # User tool links
 362                 $this->insertUserRelatedLinks($s,$rc);
 363                 # Log action text (if any)
 364                 $this->insertAction($s, $rc);
 365                 # Edit or log comment
 366                 $this->insertComment($s, $rc);
 367
 368                 # Mark revision as deleted if so
 369                 if ( !$rc_log_type && $this->isDeleted($rc,Revision::DELETED_TEXT) )
 370                    $s .= ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 371                 if($rc->numberofWatchingusers > 0) {
 372                         $s .= ' ' . wfMsg('number_of_watching_users_RCview',  $wgContLang->formatNum($rc->numberofWatchingusers));
 373                 }
 374
 375                 $s .= "</li>\n";
 376
 377                 wfProfileOut( $fname.'-rest' );
 378
 379                 wfProfileOut( $fname );
 380                 return $s;
 381         }
 382 }
 383
 384
 385 /**
 386  * Generate a list of changes using an Enhanced system (use javascript).
 387  */
 388 class EnhancedChangesList extends ChangesList {
 389         /**
 390          * Format a line for enhanced recentchange (aka with javascript and block of lines).
 391          */
 392         public function recentChangesLine( &$baseRC, $watched = false ) {
 393                 global $wgLang, $wgContLang, $wgUser;
 394
 395                 # Create a specialised object
 396                 $rc = RCCacheEntry::newFromParent( $baseRC );
 397
 398                 # Extract fields from DB into the function scope (rc_xxxx variables)
 399                 // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables.
 400                 extract( $rc->mAttribs );
 401                 $curIdEq = 'curid=' . $rc_cur_id;
 402
 403                 # If it's a new day, add the headline and flush the cache
 404                 $date = $wgLang->date( $rc_timestamp, true);
 405                 $ret = '';
 406                 if( $date != $this->lastdate ) {
 407                         # Process current cache
 408                         $ret = $this->recentChangesBlock();
 409                         $this->rc_cache = array();
 410                         $ret .= "<h4>{$date}</h4>\n";
 411                         $this->lastdate = $date;
 412                 }
 413
 414                 # Should patrol-related stuff be shown?
 415                 if( $wgUser->useRCPatrol() ) {
 416                         $rc->unpatrolled = !$rc_patrolled;
 417                 } else {
 418                         $rc->unpatrolled = false;
 419                 }
 420
 421                 $showdifflinks = true;
 422                 # Make article link
 423                 // Page moves
 424                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 425                         $msg = ( $rc_type == RC_MOVE ) ? "1movedto2" : "1movedto2_redir";
 426                         $clink = wfMsg( $msg, $this->skin->makeKnownLinkObj( $rc->getTitle(), '', 'redirect=no' ),
 427                           $this->skin->makeKnownLinkObj( $rc->getMovedToTitle(), '' ) );
 428                 // Log entries (old format) and special pages
 429                 } elseif( $rc_namespace == NS_SPECIAL ) {
 430                         list( $specialName, $logtype ) = SpecialPage::resolveAliasWithSubpage( $rc_title );
 431                         if ( $specialName == 'Log' ) {
 432                                 # Log updates, etc
 433                                 $logname = LogPage::logName( $logtype );
 434                                 $clink = '(' . $this->skin->makeKnownLinkObj( $rc->getTitle(), $logname ) . ')';
 435                         } else {
 436                                 wfDebug( "Unexpected special page in recentchanges\n" );
 437                                 $clink = '';
 438                         }
 439                 // New unpatrolled pages
 440                 } else if( $rc->unpatrolled && $rc_type == RC_NEW ) {
 441                         $clink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '', "rcid={$rc_id}" );
 442                 // Log entries
 443                 } else if( $rc_type == RC_LOG ) {
 444                         if( $rc_log_type ) {
 445                                 $logtitle = SpecialPage::getTitleFor( 'Log', $rc_log_type );
 446                                 $clink = '(' . $this->skin->makeKnownLinkObj( $logtitle, LogPage::logName($rc_log_type) ) . ')';
 447                         } else {
 448                                 $clink = $this->skin->makeLinkObj( $rc->getTitle(), '' );
 449                         }
 450                         $watched = false;
 451                 // Edits
 452                 } else {
 453                         $clink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '' );
 454                 }
 455
 456                 # Don't show unusable diff links
 457                 if ( !ChangesList::userCan($rc,Revision::DELETED_TEXT) ) {
 458                         $showdifflinks = false;
 459                 }
 460
 461                 $time = $wgContLang->time( $rc_timestamp, true, true );
 462                 $rc->watched = $watched;
 463                 $rc->link = $clink;
 464                 $rc->timestamp = $time;
 465                 $rc->numberofWatchingusers = $baseRC->numberofWatchingusers;
 466
 467                 # Make "cur" and "diff" links
 468                 if( $rc->unpatrolled ) {
 469                         $rcIdQuery = "&rcid={$rc_id}";
 470                 } else {
 471                         $rcIdQuery = '';
 472                 }
 473                 $querycur = $curIdEq."&diff=0&oldid=$rc_this_oldid";
 474                 $querydiff = $curIdEq."&diff=$rc_this_oldid&oldid=$rc_last_oldid$rcIdQuery";
 475                 $aprops = ' tabindex="'.$baseRC->counter.'"';
 476                 $curLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['cur'], $querycur, '' ,'', $aprops );
 477
 478                 # Make "diff" an "cur" links
 479                 if( !$showdifflinks ) {
 480                    $curLink = $this->message['cur'];
 481                    $diffLink = $this->message['diff'];
 482                 } else if( $rc_type == RC_NEW || $rc_type == RC_LOG || $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 483                         if( $rc_type != RC_NEW ) {
 484                                 $curLink = $this->message['cur'];
 485                         }
 486                         $diffLink = $this->message['diff'];
 487                 } else {
 488                         $diffLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['diff'], $querydiff, '' ,'', $aprops );
 489                 }
 490
 491                 # Make "last" link
 492                 if( !$showdifflinks ) {
 493                     $lastLink = $this->message['last'];
 494                 } else if( $rc_last_oldid == 0 || $rc_type == RC_LOG || $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 495                         $lastLink = $this->message['last'];
 496                 } else {
 497                         $lastLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['last'],
 498                         $curIdEq.'&diff='.$rc_this_oldid.'&oldid='.$rc_last_oldid . $rcIdQuery );
 499                 }
 500
 501                 # Make user links
 502                 if( $this->isDeleted($rc,Revision::DELETED_USER) ) {
 503                         $rc->userlink = ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-user') . '</span>';
 504                 } else {
 505                         $rc->userlink = $this->skin->userLink( $rc_user, $rc_user_text );
 506                         $rc->usertalklink = $this->skin->userToolLinks( $rc_user, $rc_user_text );
 507                 }
 508
 509                 $rc->lastlink = $lastLink;
 510                 $rc->curlink  = $curLink;
 511                 $rc->difflink = $diffLink;
 512
 513                 # Put accumulated information into the cache, for later display
 514                 # Page moves go on their own line
 515                 $title = $rc->getTitle();
 516                 $secureName = $title->getPrefixedDBkey();
 517                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 518                         # Use an @ character to prevent collision with page names
 519                         $this->rc_cache['@@' . ($this->rcMoveIndex++)] = array($rc);
 520                 } else {
 521                         # Logs are grouped by type
 522                         if( $rc_type == RC_LOG ){
 523                                 $secureName = SpecialPage::getTitleFor( 'Log', $rc_log_type )->getPrefixedDBkey();
 524                         }
 525                         if( !isset( $this->rc_cache[$secureName] ) ) {
 526                                 $this->rc_cache[$secureName] = array();
 527                         }
 528                         array_push( $this->rc_cache[$secureName], $rc );
 529                 }
 530                 return $ret;
 531         }
 532
 533         /**
 534          * Enhanced RC group
 535          */
 536         protected function recentChangesBlockGroup( $block ) {
 537                 global $wgLang, $wgContLang, $wgRCShowChangedSize;
 538                 $r = '<table cellpadding="0" cellspacing="0" border="0" style="background: none"><tr>';
 539
 540                 # Collate list of users
 541                 $userlinks = array();
 542                 # Other properties
 543                 $unpatrolled = false;
 544                 $isnew = false;
 545                 $curId = $currentRevision = 0;
 546                 # Some catalyst variables...
 547                 $namehidden = true;
 548                 $alllogs = true;
 549                 foreach( $block as $rcObj ) {
 550                         $oldid = $rcObj->mAttribs['rc_last_oldid'];
 551                         if( $rcObj->mAttribs['rc_new'] ) {
 552                                 $isnew = true;
 553                         }
 554                         // If all log actions to this page were hidden, then don't
 555                         // give the name of the affected page for this block!
 556                         if( !$this->isDeleted( $rcObj, LogPage::DELETED_ACTION ) ) {
 557                                 $namehidden = false;
 558                         }
 559                         $u = $rcObj->userlink;
 560                         if( !isset( $userlinks[$u] ) ) {
 561                                 $userlinks[$u] = 0;
 562                         }
 563                         if( $rcObj->unpatrolled ) {
 564                                 $unpatrolled = true;
 565                         }
 566                         if( $rcObj->mAttribs['rc_type'] != RC_LOG ) {
 567                                 $alllogs = false;
 568                         }
 569                         # Get the latest entry with a page_id and oldid
 570                         # since logs may not have these.
 571                         if( !$curId && $rcObj->mAttribs['rc_cur_id'] ) {
 572                                 $curId = $rcObj->mAttribs['rc_cur_id'];
 573                         }
 574                         if( !$currentRevision && $rcObj->mAttribs['rc_this_oldid'] ) {
 575                                 $currentRevision = $rcObj->mAttribs['rc_this_oldid'];
 576                         }
 577
 578                         $bot = $rcObj->mAttribs['rc_bot'];
 579                         $userlinks[$u]++;
 580                 }
 581
 582                 # Sort the list and convert to text
 583                 krsort( $userlinks );
 584                 asort( $userlinks );
 585                 $users = array();
 586                 foreach( $userlinks as $userlink => $count) {
 587                         $text = $userlink;
 588                         $text .= $wgContLang->getDirMark();
 589                         if( $count > 1 ) {
 590                                 $text .= ' ('.$count.'&times;)';
 591                         }
 592                         array_push( $users, $text );
 593                 }
 594
 595                 $users = ' <span class="changedby">[' . implode( $this->message['semicolon-separator'] . ' ', $users ) . ']</span>';
 596
 597                 # Arrow
 598                 $rci = 'RCI'.$this->rcCacheIndex;
 599                 $rcl = 'RCL'.$this->rcCacheIndex;
 600                 $rcm = 'RCM'.$this->rcCacheIndex;
 601                 $toggleLink = "javascript:toggleVisibility('$rci','$rcm','$rcl')";
 602                 $tl  = '<span id="'.$rcm.'"><a href="'.$toggleLink.'">' . $this->sideArrow() . '</a></span>';
 603                 $tl .= '<span id="'.$rcl.'" style="display:none"><a href="'.$toggleLink.'">' . $this->downArrow() . '</a></span>';
 604                 $r .= '<td valign="top" style="white-space: nowrap"><tt>'.$tl.'&nbsp;';
 605
 606                 # Main line
 607                 $r .= $this->recentChangesFlags( $isnew, false, $unpatrolled, '&nbsp;', $bot );
 608
 609                 # Timestamp
 610                 $r .= '&nbsp;'.$block[0]->timestamp.'&nbsp;</tt></td><td>';
 611
 612                 # Article link
 613                 if( $namehidden ) {
 614                         $r .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 615                 } else {
 616                         $r .= $this->maybeWatchedLink( $block[0]->link, $block[0]->watched );
 617                 }
 618
 619                 $r .= $wgContLang->getDirMark();
 620
 621                 $curIdEq = 'curid=' . $curId;
 622                 # Changes message
 623                 $n = count($block);
 624                 static $nchanges = array();
 625                 if ( !isset( $nchanges[$n] ) ) {
 626                         $nchanges[$n] = wfMsgExt( 'nchanges', array( 'parsemag', 'escape' ), $wgLang->formatNum( $n ) );
 627                 }
 628                 # Total change link
 629                 $r .= ' ';
 630                 if( !$alllogs ) {
 631                         $r .= '(';
 632                         if( !ChangesList::userCan($rcObj,Revision::DELETED_TEXT) ) {
 633                                 $r .= $nchanges[$n];
 634                         } else if( $isnew ) {
 635                                 $r .= $nchanges[$n];
 636                         } else {
 637                                 $r .= $this->skin->makeKnownLinkObj( $block[0]->getTitle(),
 638                                         $nchanges[$n], $curIdEq."&diff=$currentRevision&oldid=$oldid" );
 639                         }
 640                         $r .= ') . . ';
 641                 }
 642
 643                 # Character difference (does not apply if only log items)
 644                 if( $wgRCShowChangedSize && !$alllogs ) {
 645                         $last = 0;
 646                         $first = count($block) - 1;
 647                         # Some events (like logs) have an "empty" size, so we need to skip those...
 648                         while( $last < $first && $block[$last]->mAttribs['rc_new_len'] === NULL ) {
 649                                 $last++;
 650                         }
 651                         while( $first > $last && $block[$first]->mAttribs['rc_old_len'] === NULL ) {
 652                                 $first--;
 653                         }
 654                         # Get net change
 655                         $chardiff = $rcObj->getCharacterDifference( $block[$first]->mAttribs['rc_old_len'],
 656                                 $block[$last]->mAttribs['rc_new_len'] );
 657
 658                         if( $chardiff == '' ) {
 659                                 $r .= ' ';
 660                         } else {
 661                                 $r .= ' ' . $chardiff. ' . . ';
 662                         }
 663                 }
 664
 665                 # History
 666                 if( $alllogs ) {
 667                         // don't show history link for logs
 668                 } else if( $namehidden || !$block[0]->getTitle()->exists() ) {
 669                         $r .= '(' . $this->message['history'] . ')';
 670                 } else {
 671                         $r .= '(' . $this->skin->makeKnownLinkObj( $block[0]->getTitle(),
 672                                 $this->message['history'], $curIdEq.'&action=history' ) . ')';
 673                 }
 674
 675                 $r .= $users;
 676                 $r .= $this->numberofWatchingusers($block[0]->numberofWatchingusers);
 677
 678                 $r .= "</td></tr></table>\n";
 679
 680                 # Sub-entries
 681                 $r .= '<div id="'.$rci.'" style="display:none;"><table cellpadding="0" cellspacing="0"  border="0" style="background: none">';
 682                 foreach( $block as $rcObj ) {
 683                         # Get rc_xxxx variables
 684                         // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables.
 685                         extract( $rcObj->mAttribs );
 686
 687                         #$r .= '<tr><td valign="top">'.$this->spacerArrow();
 688                         $r .= '<tr><td valign="top">';
 689                         $r .= '<tt>'.$this->spacerIndent() . $this->spacerIndent();
 690                         $r .= $this->recentChangesFlags( $rc_new, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot );
 691                         $r .= '&nbsp;</tt></td><td valign="top">';
 692
 693                         $o = '';
 694                         if( $rc_this_oldid != 0 ) {
 695                                 $o = 'oldid='.$rc_this_oldid;
 696                         }
 697                         # Log timestamp
 698                         if( $rc_type == RC_LOG ) {
 699                                 $link = '<tt>'.$rcObj->timestamp.'</tt> ';
 700                         # Revision link
 701                         } else if( !ChangesList::userCan($rcObj,Revision::DELETED_TEXT) ) {
 702                                 $link = '<span class="history-deleted"><tt>'.$rcObj->timestamp.'</tt></span> ';
 703                         } else {
 704                                 $rcIdEq = ($rcObj->unpatrolled && $rc_type == RC_NEW) ? '&rcid='.$rcObj->mAttribs['rc_id'] : '';
 705
 706                                 $link = '<tt>'.$this->skin->makeKnownLinkObj( $rcObj->getTitle(), $rcObj->timestamp, $curIdEq.'&'.$o.$rcIdEq ).'</tt>';
 707                                 if( $this->isDeleted($rcObj,Revision::DELETED_TEXT) )
 708                                         $link = '<span class="history-deleted">'.$link.'</span> ';
 709                         }
 710                         $r .= $link;
 711
 712                         if ( !$rc_type == RC_LOG || $rc_type == RC_NEW ) {
 713                                 $r .= ' (';
 714                                 $r .= $rcObj->curlink;
 715                                 $r .= $this->message['semicolon-separator'] . ' ';
 716                                 $r .= $rcObj->lastlink;
 717                                 $r .= ')';
 718                         }
 719                         $r .= ' . . ';
 720
 721                         # Character diff
 722                         if( $wgRCShowChangedSize ) {
 723                                 $r .= ( $rcObj->getCharacterDifference() == '' ? '' : $rcObj->getCharacterDifference() . ' . . ' ) ;
 724                         }
 725                         # User links
 726                         $r .= $rcObj->userlink;
 727                         $r .= $rcObj->usertalklink;
 728                         // log action
 729                         parent::insertAction( $r, $rcObj );
 730                         // log comment
 731                         parent::insertComment( $r, $rcObj );
 732                         # Mark revision as deleted
 733                         if( !$rc_log_type && $this->isDeleted($rcObj,Revision::DELETED_TEXT) ) {
 734                                 $r .= ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 735                         }
 736
 737                         $r .= "</td></tr>\n";
 738                 }
 739                 $r .= "</table></div>\n";
 740
 741                 $this->rcCacheIndex++;
 742                 return $r;
 743         }
 744
 745         protected function maybeWatchedLink( $link, $watched=false ) {
 746                 if( $watched ) {
 747                         // FIXME: css style might be more appropriate
 748                         return '<strong class="mw-watched">' . $link . '</strong>';
 749                 } else {
 750                         return $link;
 751                 }
 752         }
 753
 754         /**
 755          * Generate HTML for an arrow or placeholder graphic
 756          * @param string $dir one of '', 'd', 'l', 'r'
 757          * @param string $alt text
 758          * @return string HTML <img> tag
 759          */
 760         protected function arrow( $dir, $alt='' ) {
 761                 global $wgStylePath;
 762                 $encUrl = htmlspecialchars( $wgStylePath . '/common/images/Arr_' . $dir . '.png' );
 763                 $encAlt = htmlspecialchars( $alt );
 764                 return "<img src=\"$encUrl\" width=\"12\" height=\"12\" alt=\"$encAlt\" />";
 765         }
 766
 767         /**
 768          * Generate HTML for a right- or left-facing arrow,
 769          * depending on language direction.
 770          * @return string HTML <img> tag
 771          */
 772         protected function sideArrow() {
 773                 global $wgContLang;
 774                 $dir = $wgContLang->isRTL() ? 'l' : 'r';
 775                 return $this->arrow( $dir, '+' );
 776         }
 777
 778         /**
 779          * Generate HTML for a down-facing arrow
 780          * depending on language direction.
 781          * @return string HTML <img> tag
 782          */
 783         protected function downArrow() {
 784                 return $this->arrow( 'd', '-' );
 785         }
 786
 787         /**
 788          * Generate HTML for a spacer image
 789          * @return string HTML <img> tag
 790          */
 791         protected function spacerArrow() {
 792                 return $this->arrow( '', ' ' );
 793         }
 794
 795         /**
 796          * Add a set of spaces
 797          * @return string HTML <td> tag
 798          */
 799         protected function spacerIndent() {
 800                 return '&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;';
 801         }
 802
 803         /**
 804          * Enhanced RC ungrouped line.
 805          * @return string a HTML formated line (generated using $r)
 806          */
 807         protected function recentChangesBlockLine( $rcObj ) {
 808                 global $wgContLang, $wgRCShowChangedSize;
 809
 810                 # Get rc_xxxx variables
 811                 // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables.
 812                 extract( $rcObj->mAttribs );
 813                 $curIdEq = 'curid='.$rc_cur_id;
 814
 815                 $r = '<table cellspacing="0" cellpadding="0" border="0" style="background: none"><tr>';
 816
 817                 $r .= '<td valign="top" style="white-space: nowrap"><tt>' . $this->spacerArrow() . '&nbsp;';
 818
 819                 # Flag and Timestamp
 820                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 821                         $r .= '&nbsp;&nbsp;&nbsp;&nbsp;'; // 4 flags -> 4 spaces
 822                 } else {
 823                         $r .= $this->recentChangesFlags( $rc_type == RC_NEW, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot );
 824                 }
 825                 $r .= '&nbsp;'.$rcObj->timestamp.'&nbsp;</tt></td><td>';
 826
 827                 # Article or log link
 828                 if( $rc_log_type ) {
 829                         $logtitle = Title::newFromText( "Log/$rc_log_type", NS_SPECIAL );
 830                         $logname = LogPage::logName( $rc_log_type );
 831                         $r .= '(' . $this->skin->makeKnownLinkObj($logtitle, $logname ) . ')';
 832                 } else if( !$this->userCan($rcObj,Revision::DELETED_TEXT) ) {
 833                         $r .= '<span class="history-deleted">' . $rcObj->link . '</span>';
 834                 } else {
 835                         $r .= $this->maybeWatchedLink( $rcObj->link, $rcObj->watched );
 836                 }
 837
 838                 # Diff and hist links
 839                 if ( $rc_type != RC_LOG ) {
 840                    $r .= ' ('. $rcObj->difflink . $this->message['semicolon-separator'] . ' ';
 841                    $r .= $this->skin->makeKnownLinkObj( $rcObj->getTitle(), wfMsg( 'hist' ), $curIdEq.'&action=history' ) . ')';
 842                 }
 843                 $r .= ' . . ';
 844
 845                 # Character diff
 846                 if( $wgRCShowChangedSize ) {
 847                         $r .= ( $rcObj->getCharacterDifference() == '' ? '' : '&nbsp;' . $rcObj->getCharacterDifference() . ' . . ' ) ;
 848                 }
 849
 850                 # User/talk
 851                 $r .= ' '.$rcObj->userlink . $rcObj->usertalklink;
 852
 853                 # Log action (if any)
 854                 if( $rc_log_type ) {
 855                         if( $this->isDeleted($rcObj,LogPage::DELETED_ACTION) ) {
 856                                 $r .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 857                         } else {
 858                                 $r .= ' ' . LogPage::actionText( $rc_log_type, $rc_log_action, $rcObj->getTitle(),
 859                                         $this->skin, LogPage::extractParams($rc_params), true, true );
 860                         }
 861                 }
 862
 863                 # Edit or log comment
 864                 if( $rc_type != RC_MOVE && $rc_type != RC_MOVE_OVER_REDIRECT ) {
 865                         // log comment
 866                         if ( $this->isDeleted($rcObj,LogPage::DELETED_COMMENT) ) {
 867                            $r .= ' <span class="history-deleted">' . wfMsg('rev-deleted-comment') . '</span>';
 868                         } else {
 869                           $r .= $this->skin->commentBlock( $rc_comment, $rcObj->getTitle() );
 870                         }
 871                 }
 872
 873                 # Show how many people are watching this if enabled
 874                 $r .= $this->numberofWatchingusers($rcObj->numberofWatchingusers);
 875
 876                 $r .= "</td></tr></table>\n";
 877                 return $r;
 878         }
 879
 880         /**
 881          * If enhanced RC is in use, this function takes the previously cached
 882          * RC lines, arranges them, and outputs the HTML
 883          */
 884         protected function recentChangesBlock() {
 885                 if( count ( $this->rc_cache ) == 0 ) {
 886                         return '';
 887                 }
 888                 $blockOut = '';
 889                 foreach( $this->rc_cache as $block ) {
 890                         if( count( $block ) < 2 ) {
 891                                 $blockOut .= $this->recentChangesBlockLine( array_shift( $block ) );
 892                         } else {
 893                                 $blockOut .= $this->recentChangesBlockGroup( $block );
 894                         }
 895                 }
 896
 897                 return '<div>'.$blockOut.'</div>';
 898         }
 899
 900         /**
 901          * Returns text for the end of RC
 902          * If enhanced RC is in use, returns pretty much all the text
 903          */
 904         public function endRecentChangesList() {
 905                 return $this->recentChangesBlock() . parent::endRecentChangesList();
 906         }
 907
 908 }