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 $rc2;
  17         }
  18 } ;
  19
  20 /**
  21  * Class to show various lists of changes:
  22  * - what links here
  23  * - related changes
  24  * - recent changes
  25  */
  26 class ChangesList {
  27         # Called by history lists and recent changes
  28         #
  29
  30         /** @todo document */
  31         function __construct( &$skin ) {
  32                 $this->skin =& $skin;
  33                 $this->preCacheMessages();
  34         }
  35
  36         /**
  37          * Fetch an appropriate changes list class for the specified user
  38          * Some users might want to use an enhanced list format, for instance
  39          *
  40          * @param $user User to fetch the list class for
  41          * @return ChangesList derivative
  42          */
  43         public static function newFromUser( &$user ) {
  44                 $sk = $user->getSkin();
  45                 $list = NULL;
  46                 if( wfRunHooks( 'FetchChangesList', array( &$user, &$sk, &$list ) ) ) {
  47                         return $user->getOption( 'usenewrc' ) ? new EnhancedChangesList( $sk ) : new OldChangesList( $sk );
  48                 } else {
  49                         return $list;
  50                 }
  51         }
  52
  53         /**
  54          * As we use the same small set of messages in various methods and that
  55          * they are called often, we call them once and save them in $this->message
  56          */
  57         function preCacheMessages() {
  58                 // Precache various messages
  59                 if( !isset( $this->message ) ) {
  60                         foreach( explode(' ', 'cur diff hist minoreditletter newpageletter last '.
  61                                 'blocklink history boteditletter' ) as $msg ) {
  62                                 $this->message[$msg] = wfMsgExt( $msg, array( 'escape') );
  63                         }
  64                 }
  65         }
  66
  67
  68         /**
  69          * Returns the appropriate flags for new page, minor change and patrolling
  70          */
  71         function recentChangesFlags( $new, $minor, $patrolled, $nothing = '&nbsp;', $bot = false ) {
  72                 $f = $new ? '<span class="newpage">' . $this->message['newpageletter'] . '</span>'
  73                                 : $nothing;
  74                 $f .= $minor ? '<span class="minor">' . $this->message['minoreditletter'] . '</span>'
  75                                 : $nothing;
  76                 $f .= $bot ? '<span class="bot">' . $this->message['boteditletter'] . '</span>' : $nothing;
  77                 $f .= $patrolled ? '<span class="unpatrolled">!</span>' : $nothing;
  78                 return "<tt>$f</tt>";
  79         }
  80
  81         /**
  82          * Returns text for the start of the tabular part of RC
  83          */
  84         function beginRecentChangesList() {
  85                 $this->rc_cache = array();
  86                 $this->rcMoveIndex = 0;
  87                 $this->rcCacheIndex = 0;
  88                 $this->lastdate = '';
  89                 $this->rclistOpen = false;
  90                 return '';
  91         }
  92
  93         /**
  94          * Returns text for the end of RC
  95          */
  96         function endRecentChangesList() {
  97                 if( $this->rclistOpen ) {
  98                         return "</ul>\n";
  99                 } else {
 100                         return '';
 101                 }
 102         }
 103
 104         /**
 105          * int $field one of DELETED_* bitfield constants
 106          * @return bool
 107          */
 108         function isDeleted( $rc, $field ) {
 109                 return ($rc->mAttribs['rc_deleted'] & $field) == $field;
 110         }
 111
 112         /**
 113          * Determine if the current user is allowed to view a particular
 114          * field of this revision, if it's marked as deleted.
 115          * @param int $field
 116          * @return bool
 117          */
 118         function userCan( $rc, $field ) {
 119                 if( ( $rc->mAttribs['rc_deleted'] & $field ) == $field ) {
 120                         global $wgUser;
 121                         $permission = ( $rc->mAttribs['rc_deleted'] & Revision::DELETED_RESTRICTED ) == Revision::DELETED_RESTRICTED
 122                                 ? 'hiderevision'
 123                                 : 'deleterevision';
 124                         wfDebug( "Checking for $permission due to $field match on $rc->mAttribs['rc_deleted']\n" );
 125                         return $wgUser->isAllowed( $permission );
 126                 } else {
 127                         return true;
 128                 }
 129         }
 130
 131         function insertMove( &$s, $rc ) {
 132                 # Diff
 133                 $s .= '(' . $this->message['diff'] . ') (';
 134                 # Hist
 135                 $s .= $this->skin->makeKnownLinkObj( $rc->getMovedToTitle(), $this->message['hist'], 'action=history' ) .
 136                         ') . . ';
 137
 138                 # "[[x]] moved to [[y]]"
 139                 $msg = ( $rc->mAttribs['rc_type'] == RC_MOVE ) ? '1movedto2' : '1movedto2_redir';
 140                 $s .= wfMsg( $msg, $this->skin->makeKnownLinkObj( $rc->getTitle(), '', 'redirect=no' ),
 141                         $this->skin->makeKnownLinkObj( $rc->getMovedToTitle(), '' ) );
 142         }
 143
 144         function insertDateHeader(&$s, $rc_timestamp) {
 145                 global $wgLang;
 146
 147                 # Make date header if necessary
 148                 $date = $wgLang->date( $rc_timestamp, true, true );
 149                 $s = '';
 150                 if( $date != $this->lastdate ) {
 151                         if( '' != $this->lastdate ) {
 152                                 $s .= "</ul>\n";
 153                         }
 154                         $s .= '<h4>'.$date."</h4>\n<ul class=\"special\">";
 155                         $this->lastdate = $date;
 156                         $this->rclistOpen = true;
 157                 }
 158         }
 159
 160         function insertLog(&$s, $title, $logtype) {
 161                 $logname = LogPage::logName( $logtype );
 162                 $s .= '(' . $this->skin->makeKnownLinkObj($title, $logname ) . ')';
 163         }
 164
 165         function insertDiffHist(&$s, &$rc, $unpatrolled) {
 166                 # Diff link
 167                 if( !$this->userCan($rc,Revision::DELETED_TEXT) ) {
 168                         $diffLink = $this->message['diff'];
 169                 } else if( $rc->mAttribs['rc_type'] == RC_NEW || $rc->mAttribs['rc_type'] == RC_LOG ) {
 170                         $diffLink = $this->message['diff'];
 171                 } else {
 172                         $rcidparam = $unpatrolled
 173                                 ? array( 'rcid' => $rc->mAttribs['rc_id'] )
 174                                 : array();
 175                         $diffLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['diff'],
 176                                 wfArrayToCGI( array(
 177                                         'curid' => $rc->mAttribs['rc_cur_id'],
 178                                         'diff'  => $rc->mAttribs['rc_this_oldid'],
 179                                         'oldid' => $rc->mAttribs['rc_last_oldid'] ),
 180                                         $rcidparam ),
 181                                 '', '', ' tabindex="'.$rc->counter.'"');
 182                 }
 183                 $s .= '('.$diffLink.') (';
 184
 185                 # History link
 186                 $s .= $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['hist'],
 187                         wfArrayToCGI( array(
 188                                 'curid' => $rc->mAttribs['rc_cur_id'],
 189                                 'action' => 'history' ) ) );
 190                 $s .= ') . . ';
 191         }
 192
 193         function insertArticleLink(&$s, &$rc, $unpatrolled, $watched) {
 194                 # Article link
 195                 # If it's a new article, there is no diff link, but if it hasn't been
 196                 # patrolled yet, we need to give users a way to do so
 197                 $params = ( $unpatrolled && $rc->mAttribs['rc_type'] == RC_NEW )
 198                         ? 'rcid='.$rc->mAttribs['rc_id']
 199                         : '';
 200                 if( $this->isDeleted($rc,Revision::DELETED_TEXT) ) {
 201                         $articlelink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '', $params );
 202                         $articlelink = '<span class="history-deleted">'.$articlelink.'</span>';
 203                 } else {
 204                     $articlelink = ' '. $this->skin->makeKnownLinkObj( $rc->getTitle(), '', $params );
 205                 }
 206                 if( $watched )
 207                         $articlelink = "<strong class=\"mw-watched\">{$articlelink}</strong>";
 208                 global $wgContLang;
 209                 $articlelink .= $wgContLang->getDirMark();
 210
 211                 $s .= ' '.$articlelink;
 212         }
 213
 214         function insertTimestamp(&$s, $rc) {
 215                 global $wgLang;
 216                 # Timestamp
 217                 $s .= '; ' . $wgLang->time( $rc->mAttribs['rc_timestamp'], true, true ) . ' . . ';
 218         }
 219
 220         /** Insert links to user page, user talk page and eventually a blocking link */
 221         function insertUserRelatedLinks(&$s, &$rc) {
 222                 if ( $this->isDeleted($rc,Revision::DELETED_USER) ) {
 223                    $s .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-user') . '</span>';
 224                 } else {
 225                   $s .= $this->skin->userLink( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 226                   $s .= $this->skin->userToolLinks( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 227                 }
 228         }
 229
 230         /** insert a formatted action */
 231         function insertAction(&$s, &$rc) {
 232                 # Add comment
 233                 if( $rc->mAttribs['rc_type'] == RC_LOG ) {
 234                         // log action
 235                         if ( $this->isDeleted($rc,LogViewer::DELETED_ACTION) ) {
 236                                 $s .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 237                         } else {
 238                                 $s .= ' ' . LogPage::actionText( $rc->mAttribs['rc_log_type'], $rc->mAttribs['rc_log_action'],
 239                                         $rc->getTitle(), $this->skin, LogPage::extractParams($rc->mAttribs['rc_params']), true, true );
 240                         }
 241                 }
 242         }
 243
 244         /** insert a formatted comment */
 245         function insertComment(&$s, &$rc) {
 246                 # Add comment
 247                 if( $rc->mAttribs['rc_type'] != RC_MOVE && $rc->mAttribs['rc_type'] != RC_MOVE_OVER_REDIRECT ) {
 248                         // log comment
 249                         if ( $this->isDeleted($rc,Revision::DELETED_COMMENT) ) {
 250                                 $s .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-comment') . '</span>';
 251                         } else {
 252                                 $s .= $this->skin->commentBlock( $rc->mAttribs['rc_comment'], $rc->getTitle() );
 253                         }
 254                 }
 255         }
 256
 257         /**
 258          * Check whether to enable recent changes patrol features
 259          * @return bool
 260          */
 261         function usePatrol() {
 262                 global $wgUseRCPatrol, $wgUser;
 263                 return( $wgUseRCPatrol && ($wgUser->isAllowed('patrol') || $wgUser->isAllowed('patrolmarks')) );
 264         }
 265
 266         /**
 267          * Returns the string which indicates the number of watching users
 268          */
 269         function numberofWatchingusers( $count ) {
 270                 global $wgLang;
 271                 static $cache = array();
 272                 if ( $count > 0 ) {
 273                         if ( !isset( $cache[$count] ) ) {
 274                                 $cache[$count] = wfMsgExt('number_of_watching_users_RCview',
 275                                         array('parsemag', 'escape'), $wgLang->formatNum($count));
 276                         }
 277                         return $cache[$count];
 278                 } else {
 279                         return '';
 280                 }
 281         }
 282 }
 283
 284
 285 /**
 286  * Generate a list of changes using the good old system (no javascript)
 287  */
 288 class OldChangesList extends ChangesList {
 289         /**
 290          * Format a line using the old system (aka without any javascript).
 291          */
 292         function recentChangesLine( &$rc, $watched = false ) {
 293                 global $wgContLang, $wgRCShowChangedSize;
 294
 295                 $fname = 'ChangesList::recentChangesLineOld';
 296                 wfProfileIn( $fname );
 297
 298                 # Extract DB fields into local scope
 299                 // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables.
 300                 extract( $rc->mAttribs );
 301
 302                 # Should patrol-related stuff be shown?
 303                 $unpatrolled = $this->usePatrol() && $rc_patrolled == 0;
 304
 305                 $this->insertDateHeader($s,$rc_timestamp);
 306
 307                 $s .= '<li>';
 308
 309                 // Moved pages
 310                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 311                         $this->insertMove( $s, $rc );
 312                 // Log entries
 313                 } elseif( $rc_log_type !='' ) {
 314                         $logtitle = Title::newFromText( "Log/$rc_log_type", NS_SPECIAL );
 315                         $this->insertLog( $s, $logtitle, $rc_log_type );
 316                 // Log entries (old format) or log targets, and special pages
 317                 } elseif( $rc_namespace == NS_SPECIAL ) {
 318                         list( $specialName, $specialSubpage ) = SpecialPage::resolveAliasWithSubpage( $rc_title );
 319                         if ( $specialName == 'Log' ) {
 320                                 $this->insertLog( $s, $rc->getTitle(), $specialSubpage );
 321                         } else {
 322                                 wfDebug( "Unexpected special page in recentchanges\n" );
 323                         }
 324                 // Log entries
 325                 } else {
 326                         wfProfileIn($fname.'-page');
 327
 328                         $this->insertDiffHist($s, $rc, $unpatrolled);
 329
 330                         # M, N, b and ! (minor, new, bot and unpatrolled)
 331                         $s .= ' ' . $this->recentChangesFlags( $rc_type == RC_NEW, $rc_minor, $unpatrolled, '', $rc_bot );
 332                         $this->insertArticleLink($s, $rc, $unpatrolled, $watched);
 333
 334                         wfProfileOut($fname.'-page');
 335                 }
 336
 337                 wfProfileIn( $fname.'-rest' );
 338
 339                 $this->insertTimestamp($s,$rc);
 340
 341                 if( $wgRCShowChangedSize ) {
 342                         $s .= ( $rc->getCharacterDifference() == '' ? '' : $rc->getCharacterDifference() . ' . . ' );
 343                 }
 344
 345                 $this->insertUserRelatedLinks($s,$rc);
 346                 $this->insertAction($s, $rc);
 347                 $this->insertComment($s, $rc);
 348
 349                 # Mark revision as deleted
 350                 if ( !$rc_log_type && $this->isDeleted($rc,Revision::DELETED_TEXT) )
 351                    $s .= ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 352                 if($rc->numberofWatchingusers > 0) {
 353                         $s .= ' ' . wfMsg('number_of_watching_users_RCview',  $wgContLang->formatNum($rc->numberofWatchingusers));
 354                 }
 355
 356                 $s .= "</li>\n";
 357
 358                 wfProfileOut( $fname.'-rest' );
 359
 360                 wfProfileOut( $fname );
 361                 return $s;
 362         }
 363 }
 364
 365
 366 /**
 367  * Generate a list of changes using an Enhanced system (use javascript).
 368  */
 369 class EnhancedChangesList extends ChangesList {
 370         /**
 371          * Format a line for enhanced recentchange (aka with javascript and block of lines).
 372          */
 373         function recentChangesLine( &$baseRC, $watched = false ) {
 374                 global $wgLang, $wgContLang;
 375
 376                 # Create a specialised object
 377                 $rc = RCCacheEntry::newFromParent( $baseRC );
 378
 379                 # Extract fields from DB into the function scope (rc_xxxx variables)
 380                 // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables.
 381                 extract( $rc->mAttribs );
 382                 $curIdEq = 'curid=' . $rc_cur_id;
 383
 384                 # If it's a new day, add the headline and flush the cache
 385                 $date = $wgLang->date( $rc_timestamp, true);
 386                 $ret = '';
 387                 if( $date != $this->lastdate ) {
 388                         # Process current cache
 389                         $ret = $this->recentChangesBlock();
 390                         $this->rc_cache = array();
 391                         $ret .= "<h4>{$date}</h4>\n";
 392                         $this->lastdate = $date;
 393                 }
 394
 395                 # Should patrol-related stuff be shown?
 396                 if( $this->usePatrol() ) {
 397                         $rc->unpatrolled = !$rc_patrolled;
 398                 } else {
 399                         $rc->unpatrolled = false;
 400                 }
 401
 402                 $showrev=true;
 403                 # Make article link
 404                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 405                         $msg = ( $rc_type == RC_MOVE ) ? "1movedto2" : "1movedto2_redir";
 406                         $clink = wfMsg( $msg, $this->skin->makeKnownLinkObj( $rc->getTitle(), '', 'redirect=no' ),
 407                           $this->skin->makeKnownLinkObj( $rc->getMovedToTitle(), '' ) );
 408                 } else if( $rc_namespace == NS_SPECIAL ) {
 409                 // Log entries (old format) and special pages
 410                         list( $specialName, $logtype ) = SpecialPage::resolveAliasWithSubpage( $rc_title );
 411                         if ( $specialName == 'Log' ) {
 412                                 # Log updates, etc
 413                                 $logname = LogPage::logName( $logtype );
 414                                 $clink = '(' . $this->skin->makeKnownLinkObj( $rc->getTitle(), $logname ) . ')';
 415                         } else {
 416                                 wfDebug( "Unexpected special page in recentchanges\n" );
 417                                 $clink = '';
 418                         }
 419                 } elseif ( $rc_log_type !='' ) {
 420                 // Log entries
 421                         $logtitle = Title::newFromText( "Log/$rc_log_type", NS_SPECIAL );
 422                         $logname = LogPage::logName( $rc_log_type );
 423                         $clink = '(' . $this->skin->makeKnownLinkObj($logtitle, $logname ) . ')';
 424                 } if ( $this->isDeleted($rc,Revision::DELETED_TEXT) ) {
 425                     $clink = '<span class="history-deleted">' . $this->skin->makeKnownLinkObj( $rc->getTitle(), '' ) . '</span>';
 426                     if ( !ChangesList::userCan($rc,Revision::DELETED_TEXT) )
 427                        $showrev=false;
 428                 } else if( $rc->unpatrolled && $rc_type == RC_NEW ) {
 429                         # Unpatrolled new page, give rc_id in query
 430                         $clink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '', "rcid={$rc_id}" );
 431                 } else {
 432                         $clink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '' );
 433                 }
 434
 435                 $time = $wgContLang->time( $rc_timestamp, true, true );
 436                 $rc->watched = $watched;
 437                 $rc->link = $clink;
 438                 $rc->timestamp = $time;
 439                 $rc->numberofWatchingusers = $baseRC->numberofWatchingusers;
 440
 441                 # Make "cur" and "diff" links
 442                 if( $rc->unpatrolled ) {
 443                         $rcIdQuery = "&rcid={$rc_id}";
 444                 } else {
 445                         $rcIdQuery = '';
 446                 }
 447                 $querycur = $curIdEq."&diff=0&oldid=$rc_this_oldid";
 448                 $querydiff = $curIdEq."&diff=$rc_this_oldid&oldid=$rc_last_oldid$rcIdQuery";
 449                 $aprops = ' tabindex="'.$baseRC->counter.'"';
 450                 $curLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['cur'], $querycur, '' ,'', $aprops );
 451                 if ( !$showrev ) {
 452                    $curLink = $this->message['cur'];
 453                    $diffLink = $this->message['diff'];
 454                 } else if( $rc_type == RC_NEW || $rc_type == RC_LOG || $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 455                         if( $rc_type != RC_NEW ) {
 456                                 $curLink = $this->message['cur'];
 457                         }
 458                         $diffLink = $this->message['diff'];
 459                 } else {
 460                         $diffLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['diff'], $querydiff, '' ,'', $aprops );
 461                 }
 462
 463                 # Make "last" link
 464                 if ( !$showrev ) {
 465                     $lastLink = $this->message['last'];
 466                 } else if( $rc_last_oldid == 0 || $rc_type == RC_LOG || $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 467                         $lastLink = $this->message['last'];
 468                 } else {
 469                         $lastLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['last'],
 470                         $curIdEq.'&diff='.$rc_this_oldid.'&oldid='.$rc_last_oldid . $rcIdQuery );
 471                 }
 472
 473                 # Make user links
 474                 if ( $this->isDeleted($rc,Revision::DELETED_USER) ) {
 475                         $rc->userlink = ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-user') . '</span>';
 476                 } else {
 477                         $rc->userlink = $this->skin->userLink( $rc_user, $rc_user_text );
 478                         $rc->usertalklink = $this->skin->userToolLinks( $rc_user, $rc_user_text );
 479                 }
 480
 481                 $rc->lastlink = $lastLink;
 482                 $rc->curlink  = $curLink;
 483                 $rc->difflink = $diffLink;
 484
 485                 # Put accumulated information into the cache, for later display
 486                 # Page moves go on their own line
 487                 $title = $rc->getTitle();
 488                 $secureName = $title->getPrefixedDBkey();
 489                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 490                         # Use an @ character to prevent collision with page names
 491                         $this->rc_cache['@@' . ($this->rcMoveIndex++)] = array($rc);
 492                 } else {
 493                         if( !isset ( $this->rc_cache[$secureName] ) ) {
 494                                 $this->rc_cache[$secureName] = array();
 495                         }
 496                         array_push( $this->rc_cache[$secureName], $rc );
 497                 }
 498                 return $ret;
 499         }
 500
 501         /**
 502          * Enhanced RC group
 503          */
 504         function recentChangesBlockGroup( $block ) {
 505                 global $wgLang, $wgContLang, $wgRCShowChangedSize;
 506                 $r = '<table cellpadding="0" cellspacing="0"><tr>';
 507
 508                 # Collate list of users
 509                 $isnew = false;
 510                 $namehidden = true;
 511                 $unpatrolled = false;
 512                 $userlinks = array();
 513                 foreach( $block as $rcObj ) {
 514                         $oldid = $rcObj->mAttribs['rc_last_oldid'];
 515                         if( $rcObj->mAttribs['rc_new'] ) {
 516                                 $isnew = true;
 517                         }
 518                         // if all log actions to this page were hidden, then don't
 519                         // give the name of the affected page for this block
 520                         if( !($rcObj->mAttribs['rc_deleted'] & LogViewer::DELETED_ACTION) ) {
 521                                 $namehidden = false;
 522                         }
 523                         $u = $rcObj->userlink;
 524                         if( !isset( $userlinks[$u] ) ) {
 525                                 $userlinks[$u] = 0;
 526                         }
 527                         if( $rcObj->unpatrolled ) {
 528                                 $unpatrolled = true;
 529                         }
 530                         $bot = $rcObj->mAttribs['rc_bot'];
 531                         $userlinks[$u]++;
 532                 }
 533
 534                 # Sort the list and convert to text
 535                 krsort( $userlinks );
 536                 asort( $userlinks );
 537                 $users = array();
 538                 foreach( $userlinks as $userlink => $count) {
 539                         $text = $userlink;
 540                         $text .= $wgContLang->getDirMark();
 541                         if( $count > 1 ) {
 542                                 $text .= ' ('.$count.'&times;)';
 543                         }
 544                         array_push( $users, $text );
 545                 }
 546
 547                 $users = ' <span class="changedby">['.implode('; ',$users).']</span>';
 548
 549                 # Arrow
 550                 $rci = 'RCI'.$this->rcCacheIndex;
 551                 $rcl = 'RCL'.$this->rcCacheIndex;
 552                 $rcm = 'RCM'.$this->rcCacheIndex;
 553                 $toggleLink = "javascript:toggleVisibility('$rci','$rcm','$rcl')";
 554                 $tl  = '<span id="'.$rcm.'"><a href="'.$toggleLink.'">' . $this->sideArrow() . '</a></span>';
 555                 $tl .= '<span id="'.$rcl.'" style="display:none"><a href="'.$toggleLink.'">' . $this->downArrow() . '</a></span>';
 556                 $r .= '<td valign="top">'.$tl;
 557
 558                 # Main line
 559                 $r .= ' '.$this->recentChangesFlags( $isnew, false, $unpatrolled, '&nbsp;', $bot );
 560
 561                 # Timestamp
 562                 $r .= '&nbsp;'.$block[0]->timestamp.'&nbsp;&nbsp;</td><td>';
 563
 564                 # Article link
 565                 if ( $namehidden )
 566                         $r .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 567                 else
 568                         $r .= $this->maybeWatchedLink( $block[0]->link, $block[0]->watched );
 569                 $r .= $wgContLang->getDirMark();
 570
 571                 $curIdEq = 'curid=' . $block[0]->mAttribs['rc_cur_id'];
 572                 $currentRevision = $block[0]->mAttribs['rc_this_oldid'];
 573                 if( $block[0]->mAttribs['rc_type'] != RC_LOG ) {
 574                         # Changes
 575                         $n = count($block);
 576                         static $nchanges = array();
 577                         if ( !isset( $nchanges[$n] ) ) {
 578                                 $nchanges[$n] = wfMsgExt( 'nchanges', array( 'parsemag', 'escape'),
 579                                         $wgLang->formatNum( $n ) );
 580                         }
 581
 582                         $r .= ' (';
 583
 584                         if( !ChangesList::userCan($rcObj,Revision::DELETED_TEXT) ) {
 585                             $r .= $nchanges[$n];
 586                         } else if( $isnew ) {
 587                                 $r .= $nchanges[$n];
 588                         } else {
 589                                 $r .= $this->skin->makeKnownLinkObj( $block[0]->getTitle(),
 590                                         $nchanges[$n], $curIdEq."&diff=$currentRevision&oldid=$oldid" );
 591                         }
 592
 593                         if( $wgRCShowChangedSize ) {
 594                                 # Character difference
 595                                 $chardiff = $rcObj->getCharacterDifference( $block[ count( $block ) - 1 ]->mAttribs['rc_old_len'],
 596                                                 $block[0]->mAttribs['rc_new_len'] );
 597                                 if( $chardiff == '' ) {
 598                                         $r .= ') ';
 599                                 } else {
 600                                         $r .= ' ' . $chardiff. ' . . ';
 601                                 }
 602                         }
 603
 604                         # History
 605                         $r .= '(' . $this->skin->makeKnownLinkObj( $block[0]->getTitle(),
 606                                 $this->message['history'], $curIdEq.'&action=history' );
 607                         $r .= ')';
 608                 }
 609
 610                 $r .= $users;
 611                 $r .=$this->numberofWatchingusers($block[0]->numberofWatchingusers);
 612
 613                 $r .= "</td></tr></table>\n";
 614
 615                 # Sub-entries
 616                 $r .= '<div id="'.$rci.'" style="display:none; font-size:95%;"><table cellpadding="0" cellspacing="0">';
 617                 foreach( $block as $rcObj ) {
 618                         # Get rc_xxxx variables
 619                         // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables.
 620                         extract( $rcObj->mAttribs );
 621
 622                         #$r .= '<tr><td valign="top">'.$this->spacerArrow();
 623                         $r .= '<tr><td valign="top">'.$this->spacerIndent();
 624                         $r .= '&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;';
 625                         $r .= $this->recentChangesFlags( $rc_new, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot );
 626                         $r .= '&nbsp;&nbsp;</td><td valign="top">';
 627
 628                         $o = '';
 629                         if( $rc_this_oldid != 0 ) {
 630                                 $o = 'oldid='.$rc_this_oldid;
 631                         }
 632                         # Revision link
 633                         if( $rc_type == RC_LOG ) {
 634                                 $link = $rcObj->timestamp.' ';
 635                         } else if( !ChangesList::userCan($rcObj,Revision::DELETED_TEXT) ) {
 636                                 $link = '<span class="history-deleted">'.$rcObj->timestamp.'</span> ';
 637                         } else {
 638                                 $link = $this->skin->makeKnownLinkObj( $rcObj->getTitle(), $rcObj->timestamp, $curIdEq.'&'.$o );
 639                                 if( $this->isDeleted($rcObj,Revision::DELETED_TEXT) )
 640                                         $link = '<span class="history-deleted">'.$link.'</span> ';
 641                         }
 642                         $r .= $link;
 643
 644                         if ( !$rc_log_type ) {
 645                                 $r .= ' (';
 646                                 $r .= $rcObj->curlink;
 647                                 $r .= '; ';
 648                                 $r .= $rcObj->lastlink;
 649                                 $r .= ')';
 650                         } else {
 651                                 $logname = LogPage::logName( $rc_log_type );
 652                                 $logtitle = Title::newFromText( "Log/$rc_log_type", NS_SPECIAL );
 653                                 $r .= '(' . $this->skin->makeKnownLinkObj($logtitle, $logname ) . ')';
 654                         }
 655                         $r .= ' . . ';
 656
 657                         # Character diff
 658                         if( $wgRCShowChangedSize ) {
 659                                 $r .= ( $rcObj->getCharacterDifference() == '' ? '' : $rcObj->getCharacterDifference() . ' . . ' ) ;
 660                         }
 661                         # User links
 662                         $r .= $rcObj->userlink;
 663                         $r .= $rcObj->usertalklink;
 664                         // log action
 665                         parent::insertAction($r, $rcObj);
 666                         // log comment
 667                         parent::insertComment($r, $rcObj);
 668                         # Mark revision as deleted
 669                         if ( !$rc_log_type && $this->isDeleted($rcObj,Revision::DELETED_TEXT) )
 670                                 $s .= ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 671
 672                         $r .= "</td></tr>\n";
 673                 }
 674                 $r .= "</table></div>\n";
 675
 676                 $this->rcCacheIndex++;
 677                 return $r;
 678         }
 679
 680         function maybeWatchedLink( $link, $watched=false ) {
 681                 if( $watched ) {
 682                         // FIXME: css style might be more appropriate
 683                         return '<strong class="mw-watched">' . $link . '</strong>';
 684                 } else {
 685                         return $link;
 686                 }
 687         }
 688
 689         /**
 690          * Generate HTML for an arrow or placeholder graphic
 691          * @param string $dir one of '', 'd', 'l', 'r'
 692          * @param string $alt text
 693          * @return string HTML <img> tag
 694          * @access private
 695          */
 696         function arrow( $dir, $alt='' ) {
 697                 global $wgStylePath;
 698                 $encUrl = htmlspecialchars( $wgStylePath . '/common/images/Arr_' . $dir . '.png' );
 699                 $encAlt = htmlspecialchars( $alt );
 700                 return "<img src=\"$encUrl\" width=\"12\" height=\"12\" alt=\"$encAlt\" />";
 701         }
 702
 703         /**
 704          * Generate HTML for a right- or left-facing arrow,
 705          * depending on language direction.
 706          * @return string HTML <img> tag
 707          * @access private
 708          */
 709         function sideArrow() {
 710                 global $wgContLang;
 711                 $dir = $wgContLang->isRTL() ? 'l' : 'r';
 712                 return $this->arrow( $dir, '+' );
 713         }
 714
 715         /**
 716          * Generate HTML for a down-facing arrow
 717          * depending on language direction.
 718          * @return string HTML <img> tag
 719          * @access private
 720          */
 721         function downArrow() {
 722                 return $this->arrow( 'd', '-' );
 723         }
 724
 725         /**
 726          * Generate HTML for a spacer image
 727          * @return string HTML <img> tag
 728          * @access private
 729          */
 730         function spacerArrow() {
 731         //FIXME: problems with FF 1.5x
 732                 return $this->arrow( '', ' ' );
 733         }
 734
 735         /**
 736          * Generate HTML for the equivilant of a spacer image for tables
 737          * @return string HTML <td> tag
 738          * @access private
 739          */
 740         function spacerColumn() {
 741                 return '<td width="12"></td>';
 742         }
 743
 744         // Adds a few spaces
 745         function spacerIndent() {
 746                 return '&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;';
 747         }
 748
 749         /**
 750          * Enhanced RC ungrouped line.
 751          * @return string a HTML formated line (generated using $r)
 752          */
 753         function recentChangesBlockLine( $rcObj ) {
 754                 global $wgContLang, $wgRCShowChangedSize;
 755
 756                 # Get rc_xxxx variables
 757                 // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables.
 758                 extract( $rcObj->mAttribs );
 759                 $curIdEq = 'curid='.$rc_cur_id;
 760
 761                 $r = '<table cellspacing="0" cellpadding="0"><tr><td>';
 762
 763                 # spacerArrow() causes issues in FF
 764                 $r .= $this->spacerColumn();
 765                 $r .= '<td valign="top">';
 766
 767                 # Flag and Timestamp
 768                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 769                         $r .= '&nbsp;&nbsp;&nbsp;&nbsp;';
 770                 } else {
 771                         $r .= '&nbsp;'.$this->recentChangesFlags( $rc_type == RC_NEW, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot );
 772                 }
 773                 $r .= '&nbsp;'.$rcObj->timestamp.'&nbsp;&nbsp;</td><td>';
 774
 775                 # Article link
 776                 if ( $rc_log_type !='' ) {
 777                         $logtitle = Title::newFromText( "Log/$rc_log_type", NS_SPECIAL );
 778                         $logname = LogPage::logName( $rc_log_type );
 779                         $r .= '(' . $this->skin->makeKnownLinkObj($logtitle, $logname ) . ')';
 780                 // All other stuff
 781                 } else {
 782                         $r .= $this->maybeWatchedLink( $rcObj->link, $rcObj->watched );
 783                 }
 784                 if ( $rc_type != RC_LOG ) {
 785                    # Diff
 786                    $r .= ' ('. $rcObj->difflink .'; ';
 787                    # Hist
 788                    $r .= $this->skin->makeKnownLinkObj( $rcObj->getTitle(), wfMsg( 'hist' ), $curIdEq.'&action=history' ) . ')';
 789                 }
 790                 $r .= ' . . ';
 791
 792                 # Character diff
 793                 if( $wgRCShowChangedSize ) {
 794                         $r .= ( $rcObj->getCharacterDifference() == '' ? '' : '&nbsp;' . $rcObj->getCharacterDifference() . ' . . ' ) ;
 795                 }
 796
 797                 # User/talk
 798                 $r .= ' '.$rcObj->userlink . $rcObj->usertalklink;
 799
 800                 # Comment
 801                 if( $rc_type != RC_MOVE && $rc_type != RC_MOVE_OVER_REDIRECT ) {
 802                         // log action
 803                         if ( $this->isDeleted($rcObj,LogViewer::DELETED_ACTION) ) {
 804                            $r .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 805                         } else {
 806                                 $r .= ' ' . LogPage::actionText( $rc_log_type, $rc_log_action, $rcObj->getTitle(), $this->skin, LogPage::extractParams($rc_params), true, true );
 807                         }
 808                         // log comment
 809                         if ( $this->isDeleted($rcObj,LogViewer::DELETED_COMMENT) ) {
 810                            $r .= ' <span class="history-deleted">' . wfMsg('rev-deleted-comment') . '</span>';
 811                         } else {
 812                           $r .= $this->skin->commentBlock( $rc_comment, $rcObj->getTitle() );
 813                         }
 814                 }
 815
 816                 $r .= $this->numberofWatchingusers($rcObj->numberofWatchingusers);
 817
 818                 $r .= "</td></tr></table>\n";
 819                 return $r;
 820         }
 821
 822         /**
 823          * If enhanced RC is in use, this function takes the previously cached
 824          * RC lines, arranges them, and outputs the HTML
 825          */
 826         function recentChangesBlock() {
 827                 if( count ( $this->rc_cache ) == 0 ) {
 828                         return '';
 829                 }
 830                 $blockOut = '';
 831                 foreach( $this->rc_cache as $block ) {
 832                         if( count( $block ) < 2 ) {
 833                                 $blockOut .= $this->recentChangesBlockLine( array_shift( $block ) );
 834                         } else {
 835                                 $blockOut .= $this->recentChangesBlockGroup( $block );
 836                         }
 837                 }
 838
 839                 return '<div>'.$blockOut.'</div>';
 840         }
 841
 842         /**
 843          * Returns text for the end of RC
 844          * If enhanced RC is in use, returns pretty much all the text
 845          */
 846         function endRecentChangesList() {
 847                 return $this->recentChangesBlock() . parent::endRecentChangesList();
 848         }
 849
 850 }
 851