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' ),
 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                 if( $date != $this->lastdate ) {
 134                         if( '' != $this->lastdate ) {
 135                                 $s .= "</ul>\n";
 136                         }
 137                         $s .= '<h4>'.$date."</h4>\n<ul class=\"special\">";
 138                         $this->lastdate = $date;
 139                         $this->rclistOpen = true;
 140                 }
 141         }
 142
 143         protected function insertLog(&$s, $title, $logtype) {
 144                 $logname = LogPage::logName( $logtype );
 145                 $s .= '(' . $this->skin->makeKnownLinkObj($title, $logname ) . ')';
 146         }
 147
 148         protected function insertDiffHist(&$s, &$rc, $unpatrolled) {
 149                 # Diff link
 150                 if( !$this->userCan($rc,Revision::DELETED_TEXT) ) {
 151                         $diffLink = $this->message['diff'];
 152                 } else if( $rc->mAttribs['rc_type'] == RC_NEW || $rc->mAttribs['rc_type'] == RC_LOG ) {
 153                         $diffLink = $this->message['diff'];
 154                 } else {
 155                         $rcidparam = $unpatrolled
 156                                 ? array( 'rcid' => $rc->mAttribs['rc_id'] )
 157                                 : array();
 158                         $diffLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['diff'],
 159                                 wfArrayToCGI( array(
 160                                         'curid' => $rc->mAttribs['rc_cur_id'],
 161                                         'diff'  => $rc->mAttribs['rc_this_oldid'],
 162                                         'oldid' => $rc->mAttribs['rc_last_oldid'] ),
 163                                         $rcidparam ),
 164                                 '', '', ' tabindex="'.$rc->counter.'"');
 165                 }
 166                 $s .= '('.$diffLink.') (';
 167
 168                 # History link
 169                 $s .= $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['hist'],
 170                         wfArrayToCGI( array(
 171                                 'curid' => $rc->mAttribs['rc_cur_id'],
 172                                 'action' => 'history' ) ) );
 173                 $s .= ') . . ';
 174         }
 175
 176         protected function insertArticleLink(&$s, &$rc, $unpatrolled, $watched) {
 177                 # Article link
 178                 # If it's a new article, there is no diff link, but if it hasn't been
 179                 # patrolled yet, we need to give users a way to do so
 180                 $params = ( $unpatrolled && $rc->mAttribs['rc_type'] == RC_NEW )
 181                         ? 'rcid='.$rc->mAttribs['rc_id']
 182                         : '';
 183                 if( $this->isDeleted($rc,Revision::DELETED_TEXT) ) {
 184                         $articlelink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '', $params );
 185                         $articlelink = '<span class="history-deleted">'.$articlelink.'</span>';
 186                 } else {
 187                     $articlelink = ' '. $this->skin->makeKnownLinkObj( $rc->getTitle(), '', $params );
 188                 }
 189                 if( $watched )
 190                         $articlelink = "<strong class=\"mw-watched\">{$articlelink}</strong>";
 191                 global $wgContLang;
 192                 $articlelink .= $wgContLang->getDirMark();
 193
 194                 wfRunHooks('ChangesListInsertArticleLink',
 195                         array(&$this, &$articlelink, &$s, &$rc, $unpatrolled, $watched));
 196
 197                 $s .= ' '.$articlelink;
 198         }
 199
 200         protected function insertTimestamp(&$s, $rc) {
 201                 global $wgLang;
 202                 # Timestamp
 203                 $s .= $this->message['semicolon-separator'] . $wgLang->time( $rc->mAttribs['rc_timestamp'], true, true ) . ' . . ';
 204         }
 205
 206         /** Insert links to user page, user talk page and eventually a blocking link */
 207         public function insertUserRelatedLinks(&$s, &$rc) {
 208                 if ( $this->isDeleted($rc,Revision::DELETED_USER) ) {
 209                    $s .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-user') . '</span>';
 210                 } else {
 211                   $s .= $this->skin->userLink( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 212                   $s .= $this->skin->userToolLinks( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 213                 }
 214         }
 215
 216         /** insert a formatted action */
 217         protected function insertAction(&$s, &$rc) {
 218                 # Add action
 219                 if( $rc->mAttribs['rc_type'] == RC_LOG ) {
 220                         // log action
 221                         if ( $this->isDeleted($rc,LogPage::DELETED_ACTION) ) {
 222                                 $s .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 223                         } else {
 224                                 $s .= ' ' . LogPage::actionText( $rc->mAttribs['rc_log_type'], $rc->mAttribs['rc_log_action'],
 225                                         $rc->getTitle(), $this->skin, LogPage::extractParams($rc->mAttribs['rc_params']), true, true );
 226                         }
 227                 }
 228         }
 229
 230         /** insert a formatted comment */
 231         protected function insertComment(&$s, &$rc) {
 232                 # Add comment
 233                 if( $rc->mAttribs['rc_type'] != RC_MOVE && $rc->mAttribs['rc_type'] != RC_MOVE_OVER_REDIRECT ) {
 234                         // log comment
 235                         if ( $this->isDeleted($rc,Revision::DELETED_COMMENT) ) {
 236                                 $s .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-comment') . '</span>';
 237                         } else {
 238                                 $s .= $this->skin->commentBlock( $rc->mAttribs['rc_comment'], $rc->getTitle() );
 239                         }
 240                 }
 241         }
 242
 243         /**
 244          * Check whether to enable recent changes patrol features
 245          * @return bool
 246          */
 247         public static function usePatrol() {
 248                 global $wgUser;
 249                 return $wgUser->useRCPatrol();
 250         }
 251
 252         /**
 253          * Returns the string which indicates the number of watching users
 254          */
 255         protected function numberofWatchingusers( $count ) {
 256                 global $wgLang;
 257                 static $cache = array();
 258                 if ( $count > 0 ) {
 259                         if ( !isset( $cache[$count] ) ) {
 260                                 $cache[$count] = wfMsgExt('number_of_watching_users_RCview',
 261                                         array('parsemag', 'escape'), $wgLang->formatNum($count));
 262                         }
 263                         return $cache[$count];
 264                 } else {
 265                         return '';
 266                 }
 267         }
 268
 269         /**
 270          * Determine if said field of a revision is hidden
 271          * @param RCCacheEntry $rc
 272          * @param int $field one of DELETED_* bitfield constants
 273          * @return bool
 274          */
 275         public static function isDeleted( $rc, $field ) {
 276                 return ($rc->mAttribs['rc_deleted'] & $field) == $field;
 277         }
 278
 279         /**
 280          * Determine if the current user is allowed to view a particular
 281          * field of this revision, if it's marked as deleted.
 282          * @param RCCacheEntry $rc
 283          * @param int $field
 284          * @return bool
 285          */
 286         public static function userCan( $rc, $field ) {
 287                 if( ( $rc->mAttribs['rc_deleted'] & $field ) == $field ) {
 288                         global $wgUser;
 289                         $permission = ( $rc->mAttribs['rc_deleted'] & Revision::DELETED_RESTRICTED ) == Revision::DELETED_RESTRICTED
 290                                 ? 'suppressrevision'
 291                                 : 'deleterevision';
 292                         wfDebug( "Checking for $permission due to $field match on $rc->mAttribs['rc_deleted']\n" );
 293                         return $wgUser->isAllowed( $permission );
 294                 } else {
 295                         return true;
 296                 }
 297         }
 298 }
 299
 300
 301 /**
 302  * Generate a list of changes using the good old system (no javascript)
 303  */
 304 class OldChangesList extends ChangesList {
 305         /**
 306          * Format a line using the old system (aka without any javascript).
 307          */
 308         public function recentChangesLine( &$rc, $watched = false ) {
 309                 global $wgContLang, $wgRCShowChangedSize, $wgUser;
 310
 311                 $fname = 'ChangesList::recentChangesLineOld';
 312                 wfProfileIn( $fname );
 313
 314                 # Extract DB fields into local scope
 315                 // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables.
 316                 extract( $rc->mAttribs );
 317
 318                 # Should patrol-related stuff be shown?
 319                 $unpatrolled = $wgUser->useRCPatrol() && $rc_patrolled == 0;
 320
 321                 $dateheader = ""; // $s now contains only <li>...</li>, for hooks' convenience.
 322                 $this->insertDateHeader($dateheader,$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                 $s .= "</li>\n";
 376
 377                 wfRunHooks('OldChangesListRecentChangesLine', array(&$this, &$s, &$rc));
 378
 379                 wfProfileOut( $fname.'-rest' );
 380
 381                 wfProfileOut( $fname );
 382                 return $dateheader . $s;
 383         }
 384 }
 385
 386
 387 /**
 388  * Generate a list of changes using an Enhanced system (use javascript).
 389  */
 390 class EnhancedChangesList extends ChangesList {
 391         /**
 392          * Format a line for enhanced recentchange (aka with javascript and block of lines).
 393          */
 394         public function recentChangesLine( &$baseRC, $watched = false ) {
 395                 global $wgLang, $wgContLang, $wgUser;
 396
 397                 # Create a specialised object
 398                 $rc = RCCacheEntry::newFromParent( $baseRC );
 399
 400                 # Extract fields from DB into the function scope (rc_xxxx variables)
 401                 // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables.
 402                 extract( $rc->mAttribs );
 403                 $curIdEq = 'curid=' . $rc_cur_id;
 404
 405                 # If it's a new day, add the headline and flush the cache
 406                 $date = $wgLang->date( $rc_timestamp, true);
 407                 $ret = '';
 408                 if( $date != $this->lastdate ) {
 409                         # Process current cache
 410                         $ret = $this->recentChangesBlock();
 411                         $this->rc_cache = array();
 412                         $ret .= "<h4>{$date}</h4>\n";
 413                         $this->lastdate = $date;
 414                 }
 415
 416                 # Should patrol-related stuff be shown?
 417                 if( $wgUser->useRCPatrol() ) {
 418                         $rc->unpatrolled = !$rc_patrolled;
 419                 } else {
 420                         $rc->unpatrolled = false;
 421                 }
 422
 423                 $showdifflinks = true;
 424                 # Make article link
 425                 // Page moves
 426                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 427                         $msg = ( $rc_type == RC_MOVE ) ? "1movedto2" : "1movedto2_redir";
 428                         $clink = wfMsg( $msg, $this->skin->makeKnownLinkObj( $rc->getTitle(), '', 'redirect=no' ),
 429                           $this->skin->makeKnownLinkObj( $rc->getMovedToTitle(), '' ) );
 430                 // Log entries (old format) and special pages
 431                 } elseif( $rc_namespace == NS_SPECIAL ) {
 432                         list( $specialName, $logtype ) = SpecialPage::resolveAliasWithSubpage( $rc_title );
 433                         if ( $specialName == 'Log' ) {
 434                                 # Log updates, etc
 435                                 $logname = LogPage::logName( $logtype );
 436                                 $clink = '(' . $this->skin->makeKnownLinkObj( $rc->getTitle(), $logname ) . ')';
 437                         } else {
 438                                 wfDebug( "Unexpected special page in recentchanges\n" );
 439                                 $clink = '';
 440                         }
 441                 // New unpatrolled pages
 442                 } else if( $rc->unpatrolled && $rc_type == RC_NEW ) {
 443                         $clink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '', "rcid={$rc_id}" );
 444                 // Log entries
 445                 } else if( $rc_type == RC_LOG ) {
 446                         if( $rc_log_type ) {
 447                                 $logtitle = SpecialPage::getTitleFor( 'Log', $rc_log_type );
 448                                 $clink = '(' . $this->skin->makeKnownLinkObj( $logtitle, LogPage::logName($rc_log_type) ) . ')';
 449                         } else {
 450                                 $clink = $this->skin->makeLinkObj( $rc->getTitle(), '' );
 451                         }
 452                         $watched = false;
 453                 // Edits
 454                 } else {
 455                         $clink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '' );
 456                 }
 457
 458                 # Don't show unusable diff links
 459                 if ( !ChangesList::userCan($rc,Revision::DELETED_TEXT) ) {
 460                         $showdifflinks = false;
 461                 }
 462
 463                 $time = $wgContLang->time( $rc_timestamp, true, true );
 464                 $rc->watched = $watched;
 465                 $rc->link = $clink;
 466                 $rc->timestamp = $time;
 467                 $rc->numberofWatchingusers = $baseRC->numberofWatchingusers;
 468
 469                 # Make "cur" and "diff" links
 470                 if( $rc->unpatrolled ) {
 471                         $rcIdQuery = "&rcid={$rc_id}";
 472                 } else {
 473                         $rcIdQuery = '';
 474                 }
 475                 $querycur = $curIdEq."&diff=0&oldid=$rc_this_oldid";
 476                 $querydiff = $curIdEq."&diff=$rc_this_oldid&oldid=$rc_last_oldid$rcIdQuery";
 477                 $aprops = ' tabindex="'.$baseRC->counter.'"';
 478                 $curLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['cur'], $querycur, '' ,'', $aprops );
 479
 480                 # Make "diff" an "cur" links
 481                 if( !$showdifflinks ) {
 482                    $curLink = $this->message['cur'];
 483                    $diffLink = $this->message['diff'];
 484                 } else if( $rc_type == RC_NEW || $rc_type == RC_LOG || $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 485                         if( $rc_type != RC_NEW ) {
 486                                 $curLink = $this->message['cur'];
 487                         }
 488                         $diffLink = $this->message['diff'];
 489                 } else {
 490                         $diffLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['diff'], $querydiff, '' ,'', $aprops );
 491                 }
 492
 493                 # Make "last" link
 494                 if( !$showdifflinks ) {
 495                     $lastLink = $this->message['last'];
 496                 } else if( $rc_last_oldid == 0 || $rc_type == RC_LOG || $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 497                         $lastLink = $this->message['last'];
 498                 } else {
 499                         $lastLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['last'],
 500                         $curIdEq.'&diff='.$rc_this_oldid.'&oldid='.$rc_last_oldid . $rcIdQuery );
 501                 }
 502
 503                 # Make user links
 504                 if( $this->isDeleted($rc,Revision::DELETED_USER) ) {
 505                         $rc->userlink = ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-user') . '</span>';
 506                 } else {
 507                         $rc->userlink = $this->skin->userLink( $rc_user, $rc_user_text );
 508                         $rc->usertalklink = $this->skin->userToolLinks( $rc_user, $rc_user_text );
 509                 }
 510
 511                 $rc->lastlink = $lastLink;
 512                 $rc->curlink  = $curLink;
 513                 $rc->difflink = $diffLink;
 514
 515                 # Put accumulated information into the cache, for later display
 516                 # Page moves go on their own line
 517                 $title = $rc->getTitle();
 518                 $secureName = $title->getPrefixedDBkey();
 519                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 520                         # Use an @ character to prevent collision with page names
 521                         $this->rc_cache['@@' . ($this->rcMoveIndex++)] = array($rc);
 522                 } else {
 523                         # Logs are grouped by type
 524                         if( $rc_type == RC_LOG ){
 525                                 $secureName = SpecialPage::getTitleFor( 'Log', $rc_log_type )->getPrefixedDBkey();
 526                         }
 527                         if( !isset( $this->rc_cache[$secureName] ) ) {
 528                                 $this->rc_cache[$secureName] = array();
 529                         }
 530                         array_push( $this->rc_cache[$secureName], $rc );
 531                 }
 532                 return $ret;
 533         }
 534
 535         /**
 536          * Enhanced RC group
 537          */
 538         protected function recentChangesBlockGroup( $block ) {
 539                 global $wgLang, $wgContLang, $wgRCShowChangedSize;
 540                 $r = '<table cellpadding="0" cellspacing="0" border="0" style="background: none"><tr>';
 541
 542                 # Collate list of users
 543                 $userlinks = array();
 544                 # Other properties
 545                 $unpatrolled = false;
 546                 $isnew = false;
 547                 $curId = $currentRevision = 0;
 548                 # Some catalyst variables...
 549                 $namehidden = true;
 550                 $alllogs = true;
 551                 foreach( $block as $rcObj ) {
 552                         $oldid = $rcObj->mAttribs['rc_last_oldid'];
 553                         if( $rcObj->mAttribs['rc_new'] ) {
 554                                 $isnew = true;
 555                         }
 556                         // If all log actions to this page were hidden, then don't
 557                         // give the name of the affected page for this block!
 558                         if( !$this->isDeleted( $rcObj, LogPage::DELETED_ACTION ) ) {
 559                                 $namehidden = false;
 560                         }
 561                         $u = $rcObj->userlink;
 562                         if( !isset( $userlinks[$u] ) ) {
 563                                 $userlinks[$u] = 0;
 564                         }
 565                         if( $rcObj->unpatrolled ) {
 566                                 $unpatrolled = true;
 567                         }
 568                         if( $rcObj->mAttribs['rc_type'] != RC_LOG ) {
 569                                 $alllogs = false;
 570                         }
 571                         # Get the latest entry with a page_id and oldid
 572                         # since logs may not have these.
 573                         if( !$curId && $rcObj->mAttribs['rc_cur_id'] ) {
 574                                 $curId = $rcObj->mAttribs['rc_cur_id'];
 575                         }
 576                         if( !$currentRevision && $rcObj->mAttribs['rc_this_oldid'] ) {
 577                                 $currentRevision = $rcObj->mAttribs['rc_this_oldid'];
 578                         }
 579
 580                         $bot = $rcObj->mAttribs['rc_bot'];
 581                         $userlinks[$u]++;
 582                 }
 583
 584                 # Sort the list and convert to text
 585                 krsort( $userlinks );
 586                 asort( $userlinks );
 587                 $users = array();
 588                 foreach( $userlinks as $userlink => $count) {
 589                         $text = $userlink;
 590                         $text .= $wgContLang->getDirMark();
 591                         if( $count > 1 ) {
 592                                 $text .= ' (' . $wgLang->formatNum( $count ) . '×)';
 593                         }
 594                         array_push( $users, $text );
 595                 }
 596
 597                 $users = ' <span class="changedby">[' . implode( $this->message['semicolon-separator'], $users ) . ']</span>';
 598
 599                 # Arrow
 600                 $rci = 'RCI'.$this->rcCacheIndex;
 601                 $rcl = 'RCL'.$this->rcCacheIndex;
 602                 $rcm = 'RCM'.$this->rcCacheIndex;
 603                 $toggleLink = "javascript:toggleVisibility('$rci','$rcm','$rcl')";
 604                 $tl  = '<span id="'.$rcm.'"><a href="'.$toggleLink.'">' . $this->sideArrow() . '</a></span>';
 605                 $tl .= '<span id="'.$rcl.'" style="display:none"><a href="'.$toggleLink.'">' . $this->downArrow() . '</a></span>';
 606                 $r .= '<td valign="top" style="white-space: nowrap"><tt>'.$tl.'&nbsp;';
 607
 608                 # Main line
 609                 $r .= $this->recentChangesFlags( $isnew, false, $unpatrolled, '&nbsp;', $bot );
 610
 611                 # Timestamp
 612                 $r .= '&nbsp;'.$block[0]->timestamp.'&nbsp;</tt></td><td>';
 613
 614                 # Article link
 615                 if( $namehidden ) {
 616                         $r .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 617                 } else {
 618                         $r .= $this->maybeWatchedLink( $block[0]->link, $block[0]->watched );
 619                 }
 620
 621                 $r .= $wgContLang->getDirMark();
 622
 623                 $curIdEq = 'curid=' . $curId;
 624                 # Changes message
 625                 $n = count($block);
 626                 static $nchanges = array();
 627                 if ( !isset( $nchanges[$n] ) ) {
 628                         $nchanges[$n] = wfMsgExt( 'nchanges', array( 'parsemag', 'escape' ), $wgLang->formatNum( $n ) );
 629                 }
 630                 # Total change link
 631                 $r .= ' ';
 632                 if( !$alllogs ) {
 633                         $r .= '(';
 634                         if( !ChangesList::userCan($rcObj,Revision::DELETED_TEXT) ) {
 635                                 $r .= $nchanges[$n];
 636                         } else if( $isnew ) {
 637                                 $r .= $nchanges[$n];
 638                         } else {
 639                                 $r .= $this->skin->makeKnownLinkObj( $block[0]->getTitle(),
 640                                         $nchanges[$n], $curIdEq."&diff=$currentRevision&oldid=$oldid" );
 641                         }
 642                         $r .= ') . . ';
 643                 }
 644
 645                 # Character difference (does not apply if only log items)
 646                 if( $wgRCShowChangedSize && !$alllogs ) {
 647                         $last = 0;
 648                         $first = count($block) - 1;
 649                         # Some events (like logs) have an "empty" size, so we need to skip those...
 650                         while( $last < $first && $block[$last]->mAttribs['rc_new_len'] === NULL ) {
 651                                 $last++;
 652                         }
 653                         while( $first > $last && $block[$first]->mAttribs['rc_old_len'] === NULL ) {
 654                                 $first--;
 655                         }
 656                         # Get net change
 657                         $chardiff = $rcObj->getCharacterDifference( $block[$first]->mAttribs['rc_old_len'],
 658                                 $block[$last]->mAttribs['rc_new_len'] );
 659
 660                         if( $chardiff == '' ) {
 661                                 $r .= ' ';
 662                         } else {
 663                                 $r .= ' ' . $chardiff. ' . . ';
 664                         }
 665                 }
 666
 667                 # History
 668                 if( $alllogs ) {
 669                         // don't show history link for logs
 670                 } else if( $namehidden || !$block[0]->getTitle()->exists() ) {
 671                         $r .= '(' . $this->message['history'] . ')';
 672                 } else {
 673                         $r .= '(' . $this->skin->makeKnownLinkObj( $block[0]->getTitle(),
 674                                 $this->message['history'], $curIdEq.'&action=history' ) . ')';
 675                 }
 676
 677                 $r .= $users;
 678                 $r .= $this->numberofWatchingusers($block[0]->numberofWatchingusers);
 679
 680                 $r .= "</td></tr></table>\n";
 681
 682                 # Sub-entries
 683                 $r .= '<div id="'.$rci.'" style="display:none;"><table cellpadding="0" cellspacing="0"  border="0" style="background: none">';
 684                 foreach( $block as $rcObj ) {
 685                         # Get rc_xxxx variables
 686                         // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables.
 687                         extract( $rcObj->mAttribs );
 688
 689                         #$r .= '<tr><td valign="top">'.$this->spacerArrow();
 690                         $r .= '<tr><td valign="top">';
 691                         $r .= '<tt>'.$this->spacerIndent() . $this->spacerIndent();
 692                         $r .= $this->recentChangesFlags( $rc_new, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot );
 693                         $r .= '&nbsp;</tt></td><td valign="top">';
 694
 695                         $o = '';
 696                         if( $rc_this_oldid != 0 ) {
 697                                 $o = 'oldid='.$rc_this_oldid;
 698                         }
 699                         # Log timestamp
 700                         if( $rc_type == RC_LOG ) {
 701                                 $link = '<tt>'.$rcObj->timestamp.'</tt> ';
 702                         # Revision link
 703                         } else if( !ChangesList::userCan($rcObj,Revision::DELETED_TEXT) ) {
 704                                 $link = '<span class="history-deleted"><tt>'.$rcObj->timestamp.'</tt></span> ';
 705                         } else {
 706                                 $rcIdEq = ($rcObj->unpatrolled && $rc_type == RC_NEW) ? '&rcid='.$rcObj->mAttribs['rc_id'] : '';
 707
 708                                 $link = '<tt>'.$this->skin->makeKnownLinkObj( $rcObj->getTitle(), $rcObj->timestamp, $curIdEq.'&'.$o.$rcIdEq ).'</tt>';
 709                                 if( $this->isDeleted($rcObj,Revision::DELETED_TEXT) )
 710                                         $link = '<span class="history-deleted">'.$link.'</span> ';
 711                         }
 712                         $r .= $link;
 713
 714                         if ( !$rc_type == RC_LOG || $rc_type == RC_NEW ) {
 715                                 $r .= ' (';
 716                                 $r .= $rcObj->curlink;
 717                                 $r .= $this->message['semicolon-separator'];
 718                                 $r .= $rcObj->lastlink;
 719                                 $r .= ')';
 720                         }
 721                         $r .= ' . . ';
 722
 723                         # Character diff
 724                         if( $wgRCShowChangedSize ) {
 725                                 $r .= ( $rcObj->getCharacterDifference() == '' ? '' : $rcObj->getCharacterDifference() . ' . . ' ) ;
 726                         }
 727                         # User links
 728                         $r .= $rcObj->userlink;
 729                         $r .= $rcObj->usertalklink;
 730                         // log action
 731                         parent::insertAction( $r, $rcObj );
 732                         // log comment
 733                         parent::insertComment( $r, $rcObj );
 734                         # Mark revision as deleted
 735                         if( !$rc_log_type && $this->isDeleted($rcObj,Revision::DELETED_TEXT) ) {
 736                                 $r .= ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 737                         }
 738
 739                         $r .= "</td></tr>\n";
 740                 }
 741                 $r .= "</table></div>\n";
 742
 743                 $this->rcCacheIndex++;
 744                 return $r;
 745         }
 746
 747         protected function maybeWatchedLink( $link, $watched=false ) {
 748                 if( $watched ) {
 749                         // FIXME: css style might be more appropriate
 750                         return '<strong class="mw-watched">' . $link . '</strong>';
 751                 } else {
 752                         return $link;
 753                 }
 754         }
 755
 756         /**
 757          * Generate HTML for an arrow or placeholder graphic
 758          * @param string $dir one of '', 'd', 'l', 'r'
 759          * @param string $alt text
 760          * @return string HTML <img> tag
 761          */
 762         protected function arrow( $dir, $alt='' ) {
 763                 global $wgStylePath;
 764                 $encUrl = htmlspecialchars( $wgStylePath . '/common/images/Arr_' . $dir . '.png' );
 765                 $encAlt = htmlspecialchars( $alt );
 766                 return "<img src=\"$encUrl\" width=\"12\" height=\"12\" alt=\"$encAlt\" />";
 767         }
 768
 769         /**
 770          * Generate HTML for a right- or left-facing arrow,
 771          * depending on language direction.
 772          * @return string HTML <img> tag
 773          */
 774         protected function sideArrow() {
 775                 global $wgContLang;
 776                 $dir = $wgContLang->isRTL() ? 'l' : 'r';
 777                 return $this->arrow( $dir, '+' );
 778         }
 779
 780         /**
 781          * Generate HTML for a down-facing arrow
 782          * depending on language direction.
 783          * @return string HTML <img> tag
 784          */
 785         protected function downArrow() {
 786                 return $this->arrow( 'd', '-' );
 787         }
 788
 789         /**
 790          * Generate HTML for a spacer image
 791          * @return string HTML <img> tag
 792          */
 793         protected function spacerArrow() {
 794                 return $this->arrow( '', ' ' );
 795         }
 796
 797         /**
 798          * Add a set of spaces
 799          * @return string HTML <td> tag
 800          */
 801         protected function spacerIndent() {
 802                 return '&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;';
 803         }
 804
 805         /**
 806          * Enhanced RC ungrouped line.
 807          * @return string a HTML formated line (generated using $r)
 808          */
 809         protected function recentChangesBlockLine( $rcObj ) {
 810                 global $wgContLang, $wgRCShowChangedSize;
 811
 812                 # Get rc_xxxx variables
 813                 // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables.
 814                 extract( $rcObj->mAttribs );
 815                 $curIdEq = 'curid='.$rc_cur_id;
 816
 817                 $r = '<table cellspacing="0" cellpadding="0" border="0" style="background: none"><tr>';
 818
 819                 $r .= '<td valign="top" style="white-space: nowrap"><tt>' . $this->spacerArrow() . '&nbsp;';
 820
 821                 # Flag and Timestamp
 822                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 823                         $r .= '&nbsp;&nbsp;&nbsp;&nbsp;'; // 4 flags -> 4 spaces
 824                 } else {
 825                         $r .= $this->recentChangesFlags( $rc_type == RC_NEW, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot );
 826                 }
 827                 $r .= '&nbsp;'.$rcObj->timestamp.'&nbsp;</tt></td><td>';
 828
 829                 # Article or log link
 830                 if( $rc_log_type ) {
 831                         $logtitle = Title::newFromText( "Log/$rc_log_type", NS_SPECIAL );
 832                         $logname = LogPage::logName( $rc_log_type );
 833                         $r .= '(' . $this->skin->makeKnownLinkObj($logtitle, $logname ) . ')';
 834                 } else if( !$this->userCan($rcObj,Revision::DELETED_TEXT) ) {
 835                         $r .= '<span class="history-deleted">' . $rcObj->link . '</span>';
 836                 } else {
 837                         $r .= $this->maybeWatchedLink( $rcObj->link, $rcObj->watched );
 838                 }
 839
 840                 # Diff and hist links
 841                 if ( $rc_type != RC_LOG ) {
 842                    $r .= ' ('. $rcObj->difflink . $this->message['semicolon-separator'];
 843                    $r .= $this->skin->makeKnownLinkObj( $rcObj->getTitle(), wfMsg( 'hist' ), $curIdEq.'&action=history' ) . ')';
 844                 }
 845                 $r .= ' . . ';
 846
 847                 # Character diff
 848                 if( $wgRCShowChangedSize ) {
 849                         $r .= ( $rcObj->getCharacterDifference() == '' ? '' : '&nbsp;' . $rcObj->getCharacterDifference() . ' . . ' ) ;
 850                 }
 851
 852                 # User/talk
 853                 $r .= ' '.$rcObj->userlink . $rcObj->usertalklink;
 854
 855                 # Log action (if any)
 856                 if( $rc_log_type ) {
 857                         if( $this->isDeleted($rcObj,LogPage::DELETED_ACTION) ) {
 858                                 $r .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 859                         } else {
 860                                 $r .= ' ' . LogPage::actionText( $rc_log_type, $rc_log_action, $rcObj->getTitle(),
 861                                         $this->skin, LogPage::extractParams($rc_params), true, true );
 862                         }
 863                 }
 864
 865                 # Edit or log comment
 866                 if( $rc_type != RC_MOVE && $rc_type != RC_MOVE_OVER_REDIRECT ) {
 867                         // log comment
 868                         if ( $this->isDeleted($rcObj,LogPage::DELETED_COMMENT) ) {
 869                            $r .= ' <span class="history-deleted">' . wfMsg('rev-deleted-comment') . '</span>';
 870                         } else {
 871                           $r .= $this->skin->commentBlock( $rc_comment, $rcObj->getTitle() );
 872                         }
 873                 }
 874
 875                 # Show how many people are watching this if enabled
 876                 $r .= $this->numberofWatchingusers($rcObj->numberofWatchingusers);
 877
 878                 $r .= "</td></tr></table>\n";
 879                 return $r;
 880         }
 881
 882         /**
 883          * If enhanced RC is in use, this function takes the previously cached
 884          * RC lines, arranges them, and outputs the HTML
 885          */
 886         protected function recentChangesBlock() {
 887                 if( count ( $this->rc_cache ) == 0 ) {
 888                         return '';
 889                 }
 890                 $blockOut = '';
 891                 foreach( $this->rc_cache as $block ) {
 892                         if( count( $block ) < 2 ) {
 893                                 $blockOut .= $this->recentChangesBlockLine( array_shift( $block ) );
 894                         } else {
 895                                 $blockOut .= $this->recentChangesBlockGroup( $block );
 896                         }
 897                 }
 898
 899                 return '<div>'.$blockOut.'</div>';
 900         }
 901
 902         /**
 903          * Returns text for the end of RC
 904          * If enhanced RC is in use, returns pretty much all the text
 905          */
 906         public function endRecentChangesList() {
 907                 return $this->recentChangesBlock() . parent::endRecentChangesList();
 908         }
 909
 910 }