includes/ChangesList.php

   1 <?php
   2 /**
   3  * Contain class to show various lists of change:
   4  * - what's link here
   5  * - related changes
   6  * - recent changes
   7  */
   8
   9 /**
  10  * @todo document
  11  */
  12 class RCCacheEntry extends RecentChange
  13 {
  14         var $secureName, $link;
  15         var $curlinks, $difflink, $lastlink , $usertalklink , $versionlink ;
  16         var $userlink, $timestamp, $watched;
  17
  18         function newFromParent( $rc )
  19         {
  20                 $rc2 = new RCCacheEntry;
  21                 $rc2->mAttribs = $rc->mAttribs;
  22                 $rc2->mExtra = $rc->mExtra;
  23                 return $rc2;
  24         }
  25 } ;
  26
  27 /**
  28  * @package MediaWiki
  29  */
  30 class ChangesList {
  31         # Called by history lists and recent changes
  32         #
  33
  34         /** @todo document */
  35         function __construct( &$skin ) {
  36                 $this->skin =& $skin;
  37                 $this->preCacheMessages();
  38         }
  39
  40         /**
  41          * Fetch an appropriate changes list class for the specified user
  42          * Some users might want to use an enhanced list format, for instance
  43          *
  44          * @param $user User to fetch the list class for
  45          * @return ChangesList derivative
  46          */
  47         public static function newFromUser( &$user ) {
  48                 $sk = $user->getSkin();
  49                 $list = NULL;
  50                 if( wfRunHooks( 'FetchChangesList', array( &$user, &$sk, &$list ) ) ) {
  51                         return $user->getOption( 'usenewrc' ) ? new EnhancedChangesList( $sk ) : new OldChangesList( $sk );
  52                 } else {
  53                         return $list;
  54                 }
  55         }
  56
  57         /**
  58          * As we use the same small set of messages in various methods and that
  59          * they are called often, we call them once and save them in $this->message
  60          */
  61         function preCacheMessages() {
  62                 // Precache various messages
  63                 if( !isset( $this->message ) ) {
  64                         foreach( explode(' ', 'cur diff hist minoreditletter newpageletter last '.
  65                                 'blocklink history boteditletter' ) as $msg ) {
  66                                 $this->message[$msg] = wfMsgExt( $msg, array( 'escape') );
  67                         }
  68                 }
  69         }
  70
  71
  72         /**
  73          * Returns the appropriate flags for new page, minor change and patrolling
  74          */
  75         function recentChangesFlags( $new, $minor, $patrolled, $nothing = '&nbsp;', $bot = false ) {
  76                 $f = $new ? '<span class="newpage">' . $this->message['newpageletter'] . '</span>'
  77                                 : $nothing;
  78                 $f .= $minor ? '<span class="minor">' . $this->message['minoreditletter'] . '</span>'
  79                                 : $nothing;
  80                 $f .= $bot ? '<span class="bot">' . $this->message['boteditletter'] . '</span>' : $nothing;
  81                 $f .= $patrolled ? '<span class="unpatrolled">!</span>' : $nothing;
  82                 return "<tt>$f</tt>";
  83         }
  84
  85         /**
  86          * Returns text for the start of the tabular part of RC
  87          */
  88         function beginRecentChangesList() {
  89                 $this->rc_cache = array();
  90                 $this->rcMoveIndex = 0;
  91                 $this->rcCacheIndex = 0;
  92                 $this->lastdate = '';
  93                 $this->rclistOpen = false;
  94                 return '';
  95         }
  96
  97         /**
  98          * Returns text for the end of RC
  99          */
 100         function endRecentChangesList() {
 101                 if( $this->rclistOpen ) {
 102                         return "</ul>\n";
 103                 } else {
 104                         return '';
 105                 }
 106         }
 107
 108         /**
 109          * int $field one of DELETED_* bitfield constants
 110          * @return bool
 111          */
 112         function isDeleted( $rc, $field ) {
 113                 return ($rc->mAttribs['rc_deleted'] & $field) == $field;
 114         }
 115
 116         /**
 117          * Determine if the current user is allowed to view a particular
 118          * field of this revision, if it's marked as deleted.
 119          * @param int $field
 120          * @return bool
 121          */
 122         function userCan( $rc, $field ) {
 123                 if( ( $rc->mAttribs['rc_deleted'] & $field ) == $field ) {
 124                         global $wgUser;
 125                         $permission = ( $rc->mAttribs['rc_deleted'] & Revision::DELETED_RESTRICTED ) == Revision::DELETED_RESTRICTED
 126                                 ? 'hiderevision'
 127                                 : 'deleterevision';
 128                         wfDebug( "Checking for $permission due to $field match on $rc->mAttribs['rc_deleted']\n" );
 129                         return $wgUser->isAllowed( $permission );
 130                 } else {
 131                         return true;
 132                 }
 133         }
 134
 135         function insertMove( &$s, $rc ) {
 136                 # Diff
 137                 $s .= '(' . $this->message['diff'] . ') (';
 138                 # Hist
 139                 $s .= $this->skin->makeKnownLinkObj( $rc->getMovedToTitle(), $this->message['hist'], 'action=history' ) .
 140                         ') . . ';
 141
 142                 # "[[x]] moved to [[y]]"
 143                 $msg = ( $rc->mAttribs['rc_type'] == RC_MOVE ) ? '1movedto2' : '1movedto2_redir';
 144                 $s .= wfMsg( $msg, $this->skin->makeKnownLinkObj( $rc->getTitle(), '', 'redirect=no' ),
 145                         $this->skin->makeKnownLinkObj( $rc->getMovedToTitle(), '' ) );
 146         }
 147
 148         function insertDateHeader(&$s, $rc_timestamp) {
 149                 global $wgLang;
 150
 151                 # Make date header if necessary
 152                 $date = $wgLang->date( $rc_timestamp, true, true );
 153                 $s = '';
 154                 if( $date != $this->lastdate ) {
 155                         if( '' != $this->lastdate ) {
 156                                 $s .= "</ul>\n";
 157                         }
 158                         $s .= '<h4>'.$date."</h4>\n<ul class=\"special\">";
 159                         $this->lastdate = $date;
 160                         $this->rclistOpen = true;
 161                 }
 162         }
 163
 164         function insertLog(&$s, $title, $logtype) {
 165                 $logname = LogPage::logName( $logtype );
 166                 $s .= '(' . $this->skin->makeKnownLinkObj($title, $logname ) . ')';
 167         }
 168
 169         function insertDiffHist(&$s, &$rc, $unpatrolled) {
 170                 # Diff link
 171                 if( !$this->userCan($rc,Revision::DELETED_TEXT) ) {
 172                         $diffLink = $this->message['diff'];
 173                 } else if( $rc->mAttribs['rc_type'] == RC_NEW || $rc->mAttribs['rc_type'] == RC_LOG) {
 174                         $diffLink = $this->message['diff'];
 175                 } else {
 176                         $rcidparam = $unpatrolled
 177                                 ? array( 'rcid' => $rc->mAttribs['rc_id'] )
 178                                 : array();
 179                         $diffLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['diff'],
 180                                 wfArrayToCGI( array(
 181                                         'curid' => $rc->mAttribs['rc_cur_id'],
 182                                         'diff'  => $rc->mAttribs['rc_this_oldid'],
 183                                         'oldid' => $rc->mAttribs['rc_last_oldid'] ),
 184                                         $rcidparam ),
 185                                 '', '', ' tabindex="'.$rc->counter.'"');
 186                 }
 187                 $s .= '('.$diffLink.') (';
 188
 189                 # History link
 190                 $s .= $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['hist'],
 191                         wfArrayToCGI( array(
 192                                 'curid' => $rc->mAttribs['rc_cur_id'],
 193                                 'action' => 'history' ) ) );
 194                 $s .= ') . . ';
 195         }
 196
 197         function insertArticleLink(&$s, &$rc, $unpatrolled, $watched) {
 198                 # Article link
 199                 # If it's a new article, there is no diff link, but if it hasn't been
 200                 # patrolled yet, we need to give users a way to do so
 201                 $params = ( $unpatrolled && $rc->mAttribs['rc_type'] == RC_NEW )
 202                         ? 'rcid='.$rc->mAttribs['rc_id']
 203                         : '';
 204                 if( $this->isDeleted($rc,Revision::DELETED_TEXT) ) {
 205                         $articlelink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '', $params );
 206                         $articlelink = '<span class="history-deleted">'.$articlelink.'</span>';
 207                 } else {
 208                     $articlelink = ' '. $this->skin->makeKnownLinkObj( $rc->getTitle(), '', $params );
 209                 }
 210                 if($watched) $articlelink = '<strong>'.$articlelink.'</strong>';
 211                 global $wgContLang;
 212                 $articlelink .= $wgContLang->getDirMark();
 213
 214                 $s .= ' '.$articlelink;
 215         }
 216
 217         function insertTimestamp(&$s, $rc) {
 218                 global $wgLang;
 219                 # Timestamp
 220                 $s .= '; ' . $wgLang->time( $rc->mAttribs['rc_timestamp'], true, true ) . ' . . ';
 221         }
 222
 223         /** Insert links to user page, user talk page and eventually a blocking link */
 224         function insertUserRelatedLinks(&$s, &$rc) {
 225                 if ( $this->isDeleted($rc,Revision::DELETED_USER) ) {
 226                    $s .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-user') . '</span>';
 227                 } else {
 228                   $s .= $this->skin->userLink( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 229                   $s .= $this->skin->userToolLinks( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 230                 }
 231         }
 232
 233         /** insert a formatted action */
 234         function insertAction(&$s, &$rc) {
 235                 # Add comment
 236                 if( $rc->mAttribs['rc_type'] == RC_LOG ) {
 237                         // log action
 238                         if ( $this->isDeleted($rc,LogViewer::DELETED_ACTION) ) {
 239                                 $s .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 240                         } else {
 241                                 $s .= ' ' . LogPage::actionText( $rc->mAttribs['rc_log_type'], $rc->mAttribs['rc_log_action'], $rc->getTitle(), $this->skin, LogPage::extractParams($rc->mAttribs['rc_params']), true, true );
 242                         }
 243                 }
 244         }
 245
 246         /** insert a formatted comment */
 247         function insertComment(&$s, &$rc) {
 248                 # Add comment
 249                 if( $rc->mAttribs['rc_type'] != RC_MOVE && $rc->mAttribs['rc_type'] != RC_MOVE_OVER_REDIRECT ) {
 250                         // log comment
 251                         if ( $this->isDeleted($rc,Revision::DELETED_COMMENT) ) {
 252                                 $s .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-comment') . '</span>';
 253                         } else {
 254                                 $s .= $this->skin->commentBlock( $rc->mAttribs['rc_comment'], $rc->getTitle() );
 255                         }
 256                 }
 257         }
 258
 259         /**
 260          * Check whether to enable recent changes patrol features
 261          * @return bool
 262          */
 263         function usePatrol() {
 264                 global $wgUseRCPatrol, $wgUser;
 265                 return( $wgUseRCPatrol && $wgUser->isAllowed( 'patrol' ) );
 266         }
 267
 268         /**
 269          * Returns the string which indicates the number of watching users
 270          */
 271         function numberofWatchingusers( $count ) {
 272                 global $wgLang;
 273                 static $cache = array();
 274                 if ( $count > 0 ) {
 275                         if ( !isset( $cache[$count] ) ) {
 276                                 $cache[$count] = wfMsgExt('number_of_watching_users_RCview',
 277                                         array('parsemag', 'escape'), $wgLang->formatNum($count));
 278                         }
 279                         return $cache[$count];
 280                 } else {
 281                         return '';
 282                 }
 283         }
 284 }
 285
 286
 287 /**
 288  * Generate a list of changes using the good old system (no javascript)
 289  */
 290 class OldChangesList extends ChangesList {
 291         /**
 292          * Format a line using the old system (aka without any javascript).
 293          */
 294         function recentChangesLine( &$rc, $watched = false ) {
 295                 global $wgContLang, $wgRCShowChangedSize;
 296
 297                 $fname = 'ChangesList::recentChangesLineOld';
 298                 wfProfileIn( $fname );
 299
 300                 # Extract DB fields into local scope
 301                 // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables.
 302                 extract( $rc->mAttribs );
 303
 304                 # Should patrol-related stuff be shown?
 305                 $unpatrolled = $this->usePatrol() && $rc_patrolled == 0;
 306
 307                 $this->insertDateHeader($s,$rc_timestamp);
 308
 309                 $s .= '<li>';
 310
 311                 // Moved pages
 312                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 313                         $this->insertMove( $s, $rc );
 314                 // Log entries (old format) or log targets, and special pages
 315                 } elseif( $rc_namespace == NS_SPECIAL ) {
 316                         list( $specialName, $specialSubpage ) = SpecialPage::resolveAliasWithSubpage( $rc_title );
 317                         if ( $specialName == 'Log' ) {
 318                                 $this->insertLog( $s, $rc->getTitle(), $specialSubpage );
 319                         } else {
 320                                 wfDebug( "Unexpected special page in recentchanges\n" );
 321                         }
 322                 // Log entries
 323                 } elseif( $rc_log_type !='' ) {
 324                         $logtitle = Title::newFromText( "Log/$rc_log_type", NS_SPECIAL );
 325                         $this->insertLog( $s, $logtitle, $rc_log_type );
 326                 // All other stuff
 327                 }  else {
 328                         wfProfileIn($fname.'-page');
 329
 330                         $this->insertDiffHist($s, $rc, $unpatrolled);
 331
 332                         # M, N, b and ! (minor, new, bot and unpatrolled)
 333                         $s .= ' ' . $this->recentChangesFlags( $rc_type == RC_NEW, $rc_minor, $unpatrolled, '', $rc_bot );
 334                         $this->insertArticleLink($s, $rc, $unpatrolled, $watched);
 335
 336                         wfProfileOut($fname.'-page');
 337                 }
 338
 339                 wfProfileIn( $fname.'-rest' );
 340
 341                 $this->insertTimestamp($s,$rc);
 342
 343                 if( $wgRCShowChangedSize ) {
 344                         $s .= ( $rc->getCharacterDifference() == '' ? '' : $rc->getCharacterDifference() . ' . . ' );
 345                 }
 346
 347                 $this->insertUserRelatedLinks($s,$rc);
 348                 $this->insertAction($s, $rc);
 349                 $this->insertComment($s, $rc);
 350
 351                 # Mark revision as deleted
 352                 if ( !$rc_log_type && $this->isDeleted($rc,Revision::DELETED_TEXT) )
 353                    $s .= ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 354                 if($rc->numberofWatchingusers > 0) {
 355                         $s .= ' ' . wfMsg('number_of_watching_users_RCview',  $wgContLang->formatNum($rc->numberofWatchingusers));
 356                 }
 357
 358                 $s .= "</li>\n";
 359
 360                 wfProfileOut( $fname.'-rest' );
 361
 362                 wfProfileOut( $fname );
 363                 return $s;
 364         }
 365 }
 366
 367
 368 /**
 369  * Generate a list of changes using an Enhanced system (use javascript).
 370  */
 371 class EnhancedChangesList extends ChangesList {
 372         /**
 373          * Format a line for enhanced recentchange (aka with javascript and block of lines).
 374          */
 375         function recentChangesLine( &$baseRC, $watched = false ) {
 376                 global $wgLang, $wgContLang;
 377
 378                 # Create a specialised object
 379                 $rc = RCCacheEntry::newFromParent( $baseRC );
 380
 381                 # Extract fields from DB into the function scope (rc_xxxx variables)
 382                 // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables.
 383                 extract( $rc->mAttribs );
 384                 $curIdEq = 'curid=' . $rc_cur_id;
 385
 386                 # If it's a new day, add the headline and flush the cache
 387                 $date = $wgLang->date( $rc_timestamp, true);
 388                 $ret = '';
 389                 if( $date != $this->lastdate ) {
 390                         # Process current cache
 391                         $ret = $this->recentChangesBlock();
 392                         $this->rc_cache = array();
 393                         $ret .= "<h4>{$date}</h4>\n";
 394                         $this->lastdate = $date;
 395                 }
 396
 397                 # Should patrol-related stuff be shown?
 398                 if( $this->usePatrol() ) {
 399                         $rc->unpatrolled = !$rc_patrolled;
 400                 } else {
 401                         $rc->unpatrolled = false;
 402                 }
 403
 404                 $showrev=true;
 405                 # Make article link
 406                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 407                         $msg = ( $rc_type == RC_MOVE ) ? "1movedto2" : "1movedto2_redir";
 408                         $clink = wfMsg( $msg, $this->skin->makeKnownLinkObj( $rc->getTitle(), '', 'redirect=no' ),
 409                           $this->skin->makeKnownLinkObj( $rc->getMovedToTitle(), '' ) );
 410                 } else if( $rc_namespace == NS_SPECIAL ) {
 411                 // Log entries (old format) and special pages
 412                         list( $specialName, $logtype ) = SpecialPage::resolveAliasWithSubpage( $rc_title );
 413                         if ( $specialName == 'Log' ) {
 414                                 # Log updates, etc
 415                                 $logname = LogPage::logName( $logtype );
 416                                 $clink = '(' . $this->skin->makeKnownLinkObj( $rc->getTitle(), $logname ) . ')';
 417                         } else {
 418                                 wfDebug( "Unexpected special page in recentchanges\n" );
 419                                 $clink = '';
 420                         }
 421                 } elseif ( $rc_log_type !='' ) {
 422                 // Log entries
 423                         $logtitle = Title::newFromText( "Log/$rc_log_type", NS_SPECIAL );
 424                         $logname = LogPage::logName( $rc_log_type );
 425                         $clink = '(' . $this->skin->makeKnownLinkObj($logtitle, $logname ) . ')';
 426                 } if ( $this->isDeleted($rc,Revision::DELETED_TEXT) ) {
 427                     $clink = '<span class="history-deleted">' . $this->skin->makeKnownLinkObj( $rc->getTitle(), '' ) . '</span>';
 428                     if ( !ChangesList::userCan($rc,Revision::DELETED_TEXT) )
 429                        $showrev=false;
 430                 } else if( $rc->unpatrolled && $rc_type == RC_NEW ) {
 431                         # Unpatrolled new page, give rc_id in query
 432                         $clink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '', "rcid={$rc_id}" );
 433                 } else {
 434                         $clink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '' );
 435                 }
 436
 437                 $time = $wgContLang->time( $rc_timestamp, true, true );
 438                 $rc->watched = $watched;
 439                 $rc->link = $clink;
 440                 $rc->timestamp = $time;
 441                 $rc->numberofWatchingusers = $baseRC->numberofWatchingusers;
 442
 443                 # Make "cur" and "diff" links
 444                 if( $rc->unpatrolled ) {
 445                         $rcIdQuery = "&rcid={$rc_id}";
 446                 } else {
 447                         $rcIdQuery = '';
 448                 }
 449                 $querycur = $curIdEq."&diff=0&oldid=$rc_this_oldid";
 450                 $querydiff = $curIdEq."&diff=$rc_this_oldid&oldid=$rc_last_oldid$rcIdQuery";
 451                 $aprops = ' tabindex="'.$baseRC->counter.'"';
 452                 $curLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['cur'], $querycur, '' ,'', $aprops );
 453                 if ( !$showrev ) {
 454                    $curLink = $this->message['cur'];
 455                    $diffLink = $this->message['diff'];
 456                 } else if( $rc_type == RC_NEW || $rc_type == RC_LOG || $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 457                         if( $rc_type != RC_NEW ) {
 458                                 $curLink = $this->message['cur'];
 459                         }
 460                         $diffLink = $this->message['diff'];
 461                 } else {
 462                         $diffLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['diff'], $querydiff, '' ,'', $aprops );
 463                 }
 464
 465                 # Make "last" link
 466                 if ( !$showrev ) {
 467                     $lastLink = $this->message['last'];
 468                 } else if( $rc_last_oldid == 0 || $rc_type == RC_LOG || $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 469                         $lastLink = $this->message['last'];
 470                 } else {
 471                         $lastLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['last'],
 472                         $curIdEq.'&diff='.$rc_this_oldid.'&oldid='.$rc_last_oldid . $rcIdQuery );
 473                 }
 474
 475                 # Make user links
 476                 if ( $this->isDeleted($rc,Revision::DELETED_USER) ) {
 477                         $rc->userlink = ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-user') . '</span>';
 478                 } else {
 479                         $rc->userlink = $this->skin->userLink( $rc_user, $rc_user_text );
 480                         $rc->usertalklink = $this->skin->userToolLinks( $rc_user, $rc_user_text );
 481                 }
 482
 483                 $rc->lastlink = $lastLink;
 484                 $rc->curlink  = $curLink;
 485                 $rc->difflink = $diffLink;
 486
 487                 # Put accumulated information into the cache, for later display
 488                 # Page moves go on their own line
 489                 $title = $rc->getTitle();
 490                 $secureName = $title->getPrefixedDBkey();
 491                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 492                         # Use an @ character to prevent collision with page names
 493                         $this->rc_cache['@@' . ($this->rcMoveIndex++)] = array($rc);
 494                 } else {
 495                         if( !isset ( $this->rc_cache[$secureName] ) ) {
 496                                 $this->rc_cache[$secureName] = array();
 497                         }
 498                         array_push( $this->rc_cache[$secureName], $rc );
 499                 }
 500                 return $ret;
 501         }
 502
 503         /**
 504          * Enhanced RC group
 505          */
 506         function recentChangesBlockGroup( $block ) {
 507                 global $wgLang, $wgContLang, $wgRCShowChangedSize;
 508                 $r = '<table cellpadding="0" cellspacing="0"><tr>';
 509
 510                 # Collate list of users
 511                 $isnew = false;
 512                 $namehidden = true;
 513                 $unpatrolled = false;
 514                 $userlinks = array();
 515                 foreach( $block as $rcObj ) {
 516                         $oldid = $rcObj->mAttribs['rc_last_oldid'];
 517                         if( $rcObj->mAttribs['rc_new'] ) {
 518                                 $isnew = true;
 519                         }
 520                         // if all log actions to this page were hidden, then don't
 521                         // give the name of the affected page for this block
 522                         if( !($rcObj->mAttribs['rc_deleted'] & LogViewer::DELETED_ACTION) ) {
 523                                 $namehidden = false;
 524                         }
 525                         $u = $rcObj->userlink;
 526                         if( !isset( $userlinks[$u] ) ) {
 527                                 $userlinks[$u] = 0;
 528                         }
 529                         if( $rcObj->unpatrolled ) {
 530                                 $unpatrolled = true;
 531                         }
 532                         $bot = $rcObj->mAttribs['rc_bot'];
 533                         $userlinks[$u]++;
 534                 }
 535
 536                 # Sort the list and convert to text
 537                 krsort( $userlinks );
 538                 asort( $userlinks );
 539                 $users = array();
 540                 foreach( $userlinks as $userlink => $count) {
 541                         $text = $userlink;
 542                         $text .= $wgContLang->getDirMark();
 543                         if( $count > 1 ) {
 544                                 $text .= ' ('.$count.'&times;)';
 545                         }
 546                         array_push( $users, $text );
 547                 }
 548
 549                 $users = ' <span class="changedby">['.implode('; ',$users).']</span>';
 550
 551                 # Arrow
 552                 $rci = 'RCI'.$this->rcCacheIndex;
 553                 $rcl = 'RCL'.$this->rcCacheIndex;
 554                 $rcm = 'RCM'.$this->rcCacheIndex;
 555                 $toggleLink = "javascript:toggleVisibility('$rci','$rcm','$rcl')";
 556                 $tl  = '<span id="'.$rcm.'"><a href="'.$toggleLink.'">' . $this->sideArrow() . '</a></span>';
 557                 $tl .= '<span id="'.$rcl.'" style="display:none"><a href="'.$toggleLink.'">' . $this->downArrow() . '</a></span>';
 558                 $r .= '<td valign="top">'.$tl;
 559
 560                 # Main line
 561                 $r .= ' '.$this->recentChangesFlags( $isnew, false, $unpatrolled, '&nbsp;', $bot );
 562
 563                 # Timestamp
 564                 $r .= ' '.$block[0]->timestamp.'&nbsp;&nbsp;</td><td>';
 565
 566                 # Article link
 567                 if ( $namehidden )
 568                         $r .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 569                 else
 570                         $r .= $this->maybeWatchedLink( $block[0]->link, $block[0]->watched );
 571                 $r .= $wgContLang->getDirMark();
 572
 573                 $curIdEq = 'curid=' . $block[0]->mAttribs['rc_cur_id'];
 574                 $currentRevision = $block[0]->mAttribs['rc_this_oldid'];
 575                 if( $block[0]->mAttribs['rc_type'] != RC_LOG ) {
 576                         # Changes
 577                         $n = count($block);
 578                         static $nchanges = array();
 579                         if ( !isset( $nchanges[$n] ) ) {
 580                                 $nchanges[$n] = wfMsgExt( 'nchanges', array( 'parsemag', 'escape'),
 581                                         $wgLang->formatNum( $n ) );
 582                         }
 583
 584                         $r .= ' (';
 585
 586                         if( !ChangesList::userCan($rcObj,Revision::DELETED_TEXT) ) {
 587                             $r .= $nchanges[$n];
 588                         } else if( $isnew ) {
 589                                 $r .= $nchanges[$n];
 590                         } else {
 591                                 $r .= $this->skin->makeKnownLinkObj( $block[0]->getTitle(),
 592                                         $nchanges[$n], $curIdEq."&diff=$currentRevision&oldid=$oldid" );
 593                         }
 594
 595                         # Character difference
 596                         $chardiff = $rcObj->getCharacterDifference( $block[ count( $block ) - 1 ]->mAttribs['rc_old_len'],
 597                                         $block[0]->mAttribs['rc_new_len'] );
 598                         if( $chardiff == '' ) {
 599                                 $r .= '; ';
 600                         } else {
 601                                 $r .= '; ' . $chardiff . ' ';
 602                         }
 603
 604                         # History
 605                         $r .= $this->skin->makeKnownLinkObj( $block[0]->getTitle(), $this->message['history'], $curIdEq.'&action=history' );
 606
 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>' . $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 ?>