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         protected function maybeWatchedLink( $link, $watched=false ) {
 300                 if( $watched ) {
 301                         // FIXME: css style might be more appropriate
 302                         return '<strong class="mw-watched">' . $link . '</strong>';
 303                 } else {
 304                         return '<span class="mw-rc-unwatched">' . $link . '</span>';
 305                 }
 306         }
 307 }
 308
 309
 310 /**
 311  * Generate a list of changes using the good old system (no javascript)
 312  */
 313 class OldChangesList extends ChangesList {
 314         /**
 315          * Format a line using the old system (aka without any javascript).
 316          */
 317         public function recentChangesLine( &$rc, $watched = false ) {
 318                 global $wgContLang, $wgRCShowChangedSize, $wgUser;
 319
 320                 $fname = 'ChangesList::recentChangesLineOld';
 321                 wfProfileIn( $fname );
 322
 323                 # Extract DB fields into local scope
 324                 // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables.
 325                 extract( $rc->mAttribs );
 326
 327                 # Should patrol-related stuff be shown?
 328                 $unpatrolled = $wgUser->useRCPatrol() && $rc_patrolled == 0;
 329
 330                 $dateheader = ""; // $s now contains only <li>...</li>, for hooks' convenience.
 331                 $this->insertDateHeader($dateheader,$rc_timestamp);
 332
 333                 $s = '';
 334
 335                 // Moved pages
 336                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 337                         $this->insertMove( $s, $rc );
 338                 // Log entries
 339                 } elseif( $rc_log_type ) {
 340                         $logtitle = Title::newFromText( "Log/$rc_log_type", NS_SPECIAL );
 341                         $this->insertLog( $s, $logtitle, $rc_log_type );
 342                 // Log entries (old format) or log targets, and special pages
 343                 } elseif( $rc_namespace == NS_SPECIAL ) {
 344                         list( $specialName, $specialSubpage ) = SpecialPage::resolveAliasWithSubpage( $rc_title );
 345                         if ( $specialName == 'Log' ) {
 346                                 $this->insertLog( $s, $rc->getTitle(), $specialSubpage );
 347                         } else {
 348                                 wfDebug( "Unexpected special page in recentchanges\n" );
 349                         }
 350                 // Regular entries
 351                 } else {
 352                         wfProfileIn($fname.'-page');
 353
 354                         $this->insertDiffHist($s, $rc, $unpatrolled);
 355
 356                         # M, N, b and ! (minor, new, bot and unpatrolled)
 357                         $s .= $this->recentChangesFlags( $rc_type == RC_NEW, $rc_minor, $unpatrolled, '', $rc_bot );
 358                         $this->insertArticleLink($s, $rc, $unpatrolled, $watched);
 359
 360                         wfProfileOut($fname.'-page');
 361                 }
 362
 363                 wfProfileIn( $fname.'-rest' );
 364
 365                 $this->insertTimestamp($s,$rc);
 366
 367                 if( $wgRCShowChangedSize ) {
 368                         $s .= ( $rc->getCharacterDifference() == '' ? '' : $rc->getCharacterDifference() . ' . . ' );
 369                 }
 370                 # User tool links
 371                 $this->insertUserRelatedLinks($s,$rc);
 372                 # Log action text (if any)
 373                 $this->insertAction($s, $rc);
 374                 # Edit or log comment
 375                 $this->insertComment($s, $rc);
 376
 377                 # Mark revision as deleted if so
 378                 if ( !$rc_log_type && $this->isDeleted($rc,Revision::DELETED_TEXT) )
 379                    $s .= ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 380                 if($rc->numberofWatchingusers > 0) {
 381                         $s .= ' ' . wfMsg('number_of_watching_users_RCview',  $wgContLang->formatNum($rc->numberofWatchingusers));
 382                 }
 383
 384                 wfRunHooks( 'OldChangesListRecentChangesLine', array(&$this, &$s, $rc) );
 385
 386                 $s = "<li>$s</li>\n";
 387
 388                 wfProfileOut( $fname.'-rest' );
 389
 390                 wfProfileOut( $fname );
 391                 return $dateheader . $s;
 392         }
 393 }
 394
 395
 396 /**
 397  * Generate a list of changes using an Enhanced system (use javascript).
 398  */
 399 class EnhancedChangesList extends ChangesList {
 400
 401         /**
 402         *  Add the JavaScript file for enhanced changeslist
 403         *  @ return string
 404         */
 405         public function beginRecentChangesList() {
 406                 global $wgStylePath, $wgJsMimeType, $wgStyleVersion;
 407                 $this->rc_cache = array();
 408                 $this->rcMoveIndex = 0;
 409                 $this->rcCacheIndex = 0;
 410                 $this->lastdate = '';
 411                 $this->rclistOpen = false;
 412                 $script = Xml::tags( 'script', array(
 413                         'type' => $wgJsMimeType,
 414                         'src' => $wgStylePath . "/common/enhancedchanges.js?$wgStyleVersion" ), '' );
 415                 return $script;
 416         }
 417         /**
 418          * Format a line for enhanced recentchange (aka with javascript and block of lines).
 419          */
 420         public function recentChangesLine( &$baseRC, $watched = false ) {
 421                 global $wgLang, $wgContLang, $wgUser;
 422
 423                 # Create a specialised object
 424                 $rc = RCCacheEntry::newFromParent( $baseRC );
 425
 426                 # Extract fields from DB into the function scope (rc_xxxx variables)
 427                 // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables.
 428                 extract( $rc->mAttribs );
 429                 $curIdEq = 'curid=' . $rc_cur_id;
 430
 431                 # If it's a new day, add the headline and flush the cache
 432                 $date = $wgLang->date( $rc_timestamp, true);
 433                 $ret = '';
 434                 if( $date != $this->lastdate ) {
 435                         # Process current cache
 436                         $ret = $this->recentChangesBlock();
 437                         $this->rc_cache = array();
 438                         $ret .= "<h4>{$date}</h4>\n";
 439                         $this->lastdate = $date;
 440                 }
 441
 442                 # Should patrol-related stuff be shown?
 443                 if( $wgUser->useRCPatrol() ) {
 444                         $rc->unpatrolled = !$rc_patrolled;
 445                 } else {
 446                         $rc->unpatrolled = false;
 447                 }
 448
 449                 $showdifflinks = true;
 450                 # Make article link
 451                 // Page moves
 452                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 453                         $msg = ( $rc_type == RC_MOVE ) ? "1movedto2" : "1movedto2_redir";
 454                         $clink = wfMsg( $msg, $this->skin->makeKnownLinkObj( $rc->getTitle(), '', 'redirect=no' ),
 455                           $this->skin->makeKnownLinkObj( $rc->getMovedToTitle(), '' ) );
 456                 // Log entries (old format) and special pages
 457                 } elseif( $rc_namespace == NS_SPECIAL ) {
 458                         list( $specialName, $logtype ) = SpecialPage::resolveAliasWithSubpage( $rc_title );
 459                         if ( $specialName == 'Log' ) {
 460                                 # Log updates, etc
 461                                 $logname = LogPage::logName( $logtype );
 462                                 $clink = '(' . $this->skin->makeKnownLinkObj( $rc->getTitle(), $logname ) . ')';
 463                         } else {
 464                                 wfDebug( "Unexpected special page in recentchanges\n" );
 465                                 $clink = '';
 466                         }
 467                 // New unpatrolled pages
 468                 } else if( $rc->unpatrolled && $rc_type == RC_NEW ) {
 469                         $clink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '', "rcid={$rc_id}" );
 470                 // Log entries
 471                 } else if( $rc_type == RC_LOG ) {
 472                         if( $rc_log_type ) {
 473                                 $logtitle = SpecialPage::getTitleFor( 'Log', $rc_log_type );
 474                                 $clink = '(' . $this->skin->makeKnownLinkObj( $logtitle, LogPage::logName($rc_log_type) ) . ')';
 475                         } else {
 476                                 $clink = $this->skin->makeLinkObj( $rc->getTitle(), '' );
 477                         }
 478                         $watched = false;
 479                 // Edits
 480                 } else {
 481                         $clink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '' );
 482                 }
 483
 484                 # Don't show unusable diff links
 485                 if ( !ChangesList::userCan($rc,Revision::DELETED_TEXT) ) {
 486                         $showdifflinks = false;
 487                 }
 488
 489                 $time = $wgContLang->time( $rc_timestamp, true, true );
 490                 $rc->watched = $watched;
 491                 $rc->link = $clink;
 492                 $rc->timestamp = $time;
 493                 $rc->numberofWatchingusers = $baseRC->numberofWatchingusers;
 494
 495                 # Make "cur" and "diff" links
 496                 if( $rc->unpatrolled ) {
 497                         $rcIdQuery = "&rcid={$rc_id}";
 498                 } else {
 499                         $rcIdQuery = '';
 500                 }
 501                 $querycur = $curIdEq."&diff=0&oldid=$rc_this_oldid";
 502                 $querydiff = $curIdEq."&diff=$rc_this_oldid&oldid=$rc_last_oldid$rcIdQuery";
 503                 $aprops = ' tabindex="'.$baseRC->counter.'"';
 504                 $curLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['cur'], $querycur, '' ,'', $aprops );
 505
 506                 # Make "diff" an "cur" links
 507                 if( !$showdifflinks ) {
 508                    $curLink = $this->message['cur'];
 509                    $diffLink = $this->message['diff'];
 510                 } else if( $rc_type == RC_NEW || $rc_type == RC_LOG || $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 511                         if( $rc_type != RC_NEW ) {
 512                                 $curLink = $this->message['cur'];
 513                         }
 514                         $diffLink = $this->message['diff'];
 515                 } else {
 516                         $diffLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['diff'], $querydiff, '' ,'', $aprops );
 517                 }
 518
 519                 # Make "last" link
 520                 if( !$showdifflinks ) {
 521                     $lastLink = $this->message['last'];
 522                 } else if( $rc_last_oldid == 0 || $rc_type == RC_LOG || $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 523                         $lastLink = $this->message['last'];
 524                 } else {
 525                         $lastLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['last'],
 526                         $curIdEq.'&diff='.$rc_this_oldid.'&oldid='.$rc_last_oldid . $rcIdQuery );
 527                 }
 528
 529                 # Make user links
 530                 if( $this->isDeleted($rc,Revision::DELETED_USER) ) {
 531                         $rc->userlink = ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-user') . '</span>';
 532                 } else {
 533                         $rc->userlink = $this->skin->userLink( $rc_user, $rc_user_text );
 534                         $rc->usertalklink = $this->skin->userToolLinks( $rc_user, $rc_user_text );
 535                 }
 536
 537                 $rc->lastlink = $lastLink;
 538                 $rc->curlink  = $curLink;
 539                 $rc->difflink = $diffLink;
 540
 541                 # Put accumulated information into the cache, for later display
 542                 # Page moves go on their own line
 543                 $title = $rc->getTitle();
 544                 $secureName = $title->getPrefixedDBkey();
 545                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 546                         # Use an @ character to prevent collision with page names
 547                         $this->rc_cache['@@' . ($this->rcMoveIndex++)] = array($rc);
 548                 } else {
 549                         # Logs are grouped by type
 550                         if( $rc_type == RC_LOG ){
 551                                 $secureName = SpecialPage::getTitleFor( 'Log', $rc_log_type )->getPrefixedDBkey();
 552                         }
 553                         if( !isset( $this->rc_cache[$secureName] ) ) {
 554                                 $this->rc_cache[$secureName] = array();
 555                         }
 556                         array_push( $this->rc_cache[$secureName], $rc );
 557                 }
 558                 return $ret;
 559         }
 560
 561         /**
 562          * Enhanced RC group
 563          */
 564         protected function recentChangesBlockGroup( $block ) {
 565                 global $wgLang, $wgContLang, $wgRCShowChangedSize;
 566                 $r = '<table cellpadding="0" cellspacing="0" border="0" style="background: none"><tr>';
 567
 568                 # Collate list of users
 569                 $userlinks = array();
 570                 # Other properties
 571                 $unpatrolled = false;
 572                 $isnew = false;
 573                 $curId = $currentRevision = 0;
 574                 # Some catalyst variables...
 575                 $namehidden = true;
 576                 $alllogs = true;
 577                 foreach( $block as $rcObj ) {
 578                         $oldid = $rcObj->mAttribs['rc_last_oldid'];
 579                         if( $rcObj->mAttribs['rc_new'] ) {
 580                                 $isnew = true;
 581                         }
 582                         // If all log actions to this page were hidden, then don't
 583                         // give the name of the affected page for this block!
 584                         if( !$this->isDeleted( $rcObj, LogPage::DELETED_ACTION ) ) {
 585                                 $namehidden = false;
 586                         }
 587                         $u = $rcObj->userlink;
 588                         if( !isset( $userlinks[$u] ) ) {
 589                                 $userlinks[$u] = 0;
 590                         }
 591                         if( $rcObj->unpatrolled ) {
 592                                 $unpatrolled = true;
 593                         }
 594                         if( $rcObj->mAttribs['rc_type'] != RC_LOG ) {
 595                                 $alllogs = false;
 596                         }
 597                         # Get the latest entry with a page_id and oldid
 598                         # since logs may not have these.
 599                         if( !$curId && $rcObj->mAttribs['rc_cur_id'] ) {
 600                                 $curId = $rcObj->mAttribs['rc_cur_id'];
 601                         }
 602                         if( !$currentRevision && $rcObj->mAttribs['rc_this_oldid'] ) {
 603                                 $currentRevision = $rcObj->mAttribs['rc_this_oldid'];
 604                         }
 605
 606                         $bot = $rcObj->mAttribs['rc_bot'];
 607                         $userlinks[$u]++;
 608                 }
 609
 610                 # Sort the list and convert to text
 611                 krsort( $userlinks );
 612                 asort( $userlinks );
 613                 $users = array();
 614                 foreach( $userlinks as $userlink => $count) {
 615                         $text = $userlink;
 616                         $text .= $wgContLang->getDirMark();
 617                         if( $count > 1 ) {
 618                                 $text .= ' (' . $wgLang->formatNum( $count ) . '×)';
 619                         }
 620                         array_push( $users, $text );
 621                 }
 622
 623                 $users = ' <span class="changedby">[' . implode( $this->message['semicolon-separator'], $users ) . ']</span>';
 624
 625                 # ID for JS visibility toggle
 626                 $jsid = $this->rcCacheIndex;
 627                 # onclick handler to toggle hidden/expanded
 628                 $toggleLink = "onclick='toggleVisibility($jsid); return false'";
 629                 # Title for <a> tags
 630                 $expandTitle = htmlspecialchars( wfMsg('rc-enhanced-expand') );
 631                 $closeTitle = htmlspecialchars( wfMsg('rc-enhanced-hide') );
 632
 633                 $tl  = "<span id='mw-rc-openarrow-$jsid' class='mw-changeslist-expanded' style='visibility:hidden'><a href='#' $toggleLink title='$expandTitle'>" . $this->sideArrow() . "</a></span>";
 634                 $tl .= "<span id='mw-rc-closearrow-$jsid' class='mw-changeslist-hidden' style='display:none'><a href='#' $toggleLink title='$closeTitle'>" . $this->downArrow() . "</a></span>";
 635                 $r .= '<td valign="top" style="white-space: nowrap"><tt>'.$tl.'&nbsp;';
 636
 637                 # Main line
 638                 $r .= $this->recentChangesFlags( $isnew, false, $unpatrolled, '&nbsp;', $bot );
 639
 640                 # Timestamp
 641                 $r .= '&nbsp;'.$block[0]->timestamp.'&nbsp;</tt></td><td>';
 642
 643                 # Article link
 644                 if( $namehidden ) {
 645                         $r .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 646                 } else {
 647                         $r .= $this->maybeWatchedLink( $block[0]->link, $block[0]->watched );
 648                 }
 649
 650                 $r .= $wgContLang->getDirMark();
 651
 652                 $curIdEq = 'curid=' . $curId;
 653                 # Changes message
 654                 $n = count($block);
 655                 static $nchanges = array();
 656                 if ( !isset( $nchanges[$n] ) ) {
 657                         $nchanges[$n] = wfMsgExt( 'nchanges', array( 'parsemag', 'escape' ), $wgLang->formatNum( $n ) );
 658                 }
 659                 # Total change link
 660                 $r .= ' ';
 661                 if( !$alllogs ) {
 662                         $r .= '(';
 663                         if( !ChangesList::userCan($rcObj,Revision::DELETED_TEXT) ) {
 664                                 $r .= $nchanges[$n];
 665                         } else if( $isnew ) {
 666                                 $r .= $nchanges[$n];
 667                         } else {
 668                                 $r .= $this->skin->makeKnownLinkObj( $block[0]->getTitle(),
 669                                         $nchanges[$n], $curIdEq."&diff=$currentRevision&oldid=$oldid" );
 670                         }
 671                         $r .= ') . . ';
 672                 }
 673
 674                 # Character difference (does not apply if only log items)
 675                 if( $wgRCShowChangedSize && !$alllogs ) {
 676                         $last = 0;
 677                         $first = count($block) - 1;
 678                         # Some events (like logs) have an "empty" size, so we need to skip those...
 679                         while( $last < $first && $block[$last]->mAttribs['rc_new_len'] === NULL ) {
 680                                 $last++;
 681                         }
 682                         while( $first > $last && $block[$first]->mAttribs['rc_old_len'] === NULL ) {
 683                                 $first--;
 684                         }
 685                         # Get net change
 686                         $chardiff = $rcObj->getCharacterDifference( $block[$first]->mAttribs['rc_old_len'],
 687                                 $block[$last]->mAttribs['rc_new_len'] );
 688
 689                         if( $chardiff == '' ) {
 690                                 $r .= ' ';
 691                         } else {
 692                                 $r .= ' ' . $chardiff. ' . . ';
 693                         }
 694                 }
 695
 696                 # History
 697                 if( $alllogs ) {
 698                         // don't show history link for logs
 699                 } else if( $namehidden || !$block[0]->getTitle()->exists() ) {
 700                         $r .= '(' . $this->message['history'] . ')';
 701                 } else {
 702                         $r .= '(' . $this->skin->makeKnownLinkObj( $block[0]->getTitle(),
 703                                 $this->message['history'], $curIdEq.'&action=history' ) . ')';
 704                 }
 705
 706                 $r .= $users;
 707                 $r .= $this->numberofWatchingusers($block[0]->numberofWatchingusers);
 708
 709                 $r .= "</td></tr></table>\n";
 710
 711                 # Sub-entries
 712                 $r .= '<div id="mw-rc-subentries-'.$jsid.'" class="mw-changeslist-hidden"><table cellpadding="0" cellspacing="0"  border="0" style="background: none">';
 713                 foreach( $block as $rcObj ) {
 714                         # Get rc_xxxx variables
 715                         // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables.
 716                         extract( $rcObj->mAttribs );
 717
 718                         #$r .= '<tr><td valign="top">'.$this->spacerArrow();
 719                         $r .= '<tr><td valign="top">';
 720                         $r .= '<tt>'.$this->spacerIndent() . $this->spacerIndent();
 721                         $r .= $this->recentChangesFlags( $rc_new, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot );
 722                         $r .= '&nbsp;</tt></td><td valign="top">';
 723
 724                         $o = '';
 725                         if( $rc_this_oldid != 0 ) {
 726                                 $o = 'oldid='.$rc_this_oldid;
 727                         }
 728                         # Log timestamp
 729                         if( $rc_type == RC_LOG ) {
 730                                 $link = '<tt>'.$rcObj->timestamp.'</tt> ';
 731                         # Revision link
 732                         } else if( !ChangesList::userCan($rcObj,Revision::DELETED_TEXT) ) {
 733                                 $link = '<span class="history-deleted"><tt>'.$rcObj->timestamp.'</tt></span> ';
 734                         } else {
 735                                 $rcIdEq = ($rcObj->unpatrolled && $rc_type == RC_NEW) ? '&rcid='.$rcObj->mAttribs['rc_id'] : '';
 736
 737                                 $link = '<tt>'.$this->skin->makeKnownLinkObj( $rcObj->getTitle(), $rcObj->timestamp, $curIdEq.'&'.$o.$rcIdEq ).'</tt>';
 738                                 if( $this->isDeleted($rcObj,Revision::DELETED_TEXT) )
 739                                         $link = '<span class="history-deleted">'.$link.'</span> ';
 740                         }
 741                         $r .= $link;
 742
 743                         if ( !$rc_type == RC_LOG || $rc_type == RC_NEW ) {
 744                                 $r .= ' (';
 745                                 $r .= $rcObj->curlink;
 746                                 $r .= $this->message['semicolon-separator'];
 747                                 $r .= $rcObj->lastlink;
 748                                 $r .= ')';
 749                         }
 750                         $r .= ' . . ';
 751
 752                         # Character diff
 753                         if( $wgRCShowChangedSize ) {
 754                                 $r .= ( $rcObj->getCharacterDifference() == '' ? '' : $rcObj->getCharacterDifference() . ' . . ' ) ;
 755                         }
 756                         # User links
 757                         $r .= $rcObj->userlink;
 758                         $r .= $rcObj->usertalklink;
 759                         // log action
 760                         parent::insertAction( $r, $rcObj );
 761                         // log comment
 762                         parent::insertComment( $r, $rcObj );
 763                         # Mark revision as deleted
 764                         if( !$rc_log_type && $this->isDeleted($rcObj,Revision::DELETED_TEXT) ) {
 765                                 $r .= ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 766                         }
 767
 768                         $r .= "</td></tr>\n";
 769                 }
 770                 $r .= "</table></div>\n";
 771
 772                 $this->rcCacheIndex++;
 773                 return $r;
 774         }
 775
 776         /**
 777          * Generate HTML for an arrow or placeholder graphic
 778          * @param string $dir one of '', 'd', 'l', 'r'
 779          * @param string $alt text
 780          * @param string $title text
 781          * @return string HTML <img> tag
 782          */
 783         protected function arrow( $dir, $alt='', $title='' ) {
 784                 global $wgStylePath;
 785                 $encUrl = htmlspecialchars( $wgStylePath . '/common/images/Arr_' . $dir . '.png' );
 786                 $encAlt = htmlspecialchars( $alt );
 787                 $encTitle = htmlspecialchars( $title );
 788                 return "<img src=\"$encUrl\" width=\"12\" height=\"12\" alt=\"$encAlt\" title=\"$encTitle\" />";
 789         }
 790
 791         /**
 792          * Generate HTML for a right- or left-facing arrow,
 793          * depending on language direction.
 794          * @return string HTML <img> tag
 795          */
 796         protected function sideArrow() {
 797                 global $wgContLang;
 798                 $dir = $wgContLang->isRTL() ? 'l' : 'r';
 799                 return $this->arrow( $dir, '+', wfMsg('rc-enhanced-expand') );
 800         }
 801
 802         /**
 803          * Generate HTML for a down-facing arrow
 804          * depending on language direction.
 805          * @return string HTML <img> tag
 806          */
 807         protected function downArrow() {
 808                 return $this->arrow( 'd', '-', wfMsg('rc-enhanced-hide') );
 809         }
 810
 811         /**
 812          * Generate HTML for a spacer image
 813          * @return string HTML <img> tag
 814          */
 815         protected function spacerArrow() {
 816                 return $this->arrow( '', codepointToUtf8( 0xa0 ) ); // non-breaking space
 817         }
 818
 819         /**
 820          * Add a set of spaces
 821          * @return string HTML <td> tag
 822          */
 823         protected function spacerIndent() {
 824                 return '&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;';
 825         }
 826
 827         /**
 828          * Enhanced RC ungrouped line.
 829          * @return string a HTML formated line (generated using $r)
 830          */
 831         protected function recentChangesBlockLine( $rcObj ) {
 832                 global $wgContLang, $wgRCShowChangedSize;
 833
 834                 # Get rc_xxxx variables
 835                 // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables.
 836                 extract( $rcObj->mAttribs );
 837                 $curIdEq = 'curid='.$rc_cur_id;
 838
 839                 $r = '<table cellspacing="0" cellpadding="0" border="0" style="background: none"><tr>';
 840
 841                 $r .= '<td valign="top" style="white-space: nowrap"><tt>' . $this->spacerArrow() . '&nbsp;';
 842
 843                 # Flag and Timestamp
 844                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 845                         $r .= '&nbsp;&nbsp;&nbsp;&nbsp;'; // 4 flags -> 4 spaces
 846                 } else {
 847                         $r .= $this->recentChangesFlags( $rc_type == RC_NEW, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot );
 848                 }
 849                 $r .= '&nbsp;'.$rcObj->timestamp.'&nbsp;</tt></td><td>';
 850
 851                 # Article or log link
 852                 if( $rc_log_type ) {
 853                         $logtitle = Title::newFromText( "Log/$rc_log_type", NS_SPECIAL );
 854                         $logname = LogPage::logName( $rc_log_type );
 855                         $r .= '(' . $this->skin->makeKnownLinkObj($logtitle, $logname ) . ')';
 856                 } else if( !$this->userCan($rcObj,Revision::DELETED_TEXT) ) {
 857                         $r .= '<span class="history-deleted">' . $rcObj->link . '</span>';
 858                 } else {
 859                         $r .= $this->maybeWatchedLink( $rcObj->link, $rcObj->watched );
 860                 }
 861
 862                 # Diff and hist links
 863                 if ( $rc_type != RC_LOG ) {
 864                    $r .= ' ('. $rcObj->difflink . $this->message['semicolon-separator'];
 865                    $r .= $this->skin->makeKnownLinkObj( $rcObj->getTitle(), wfMsg( 'hist' ), $curIdEq.'&action=history' ) . ')';
 866                 }
 867                 $r .= ' . . ';
 868
 869                 # Character diff
 870                 if( $wgRCShowChangedSize ) {
 871                         $r .= ( $rcObj->getCharacterDifference() == '' ? '' : '&nbsp;' . $rcObj->getCharacterDifference() . ' . . ' ) ;
 872                 }
 873
 874                 # User/talk
 875                 $r .= ' '.$rcObj->userlink . $rcObj->usertalklink;
 876
 877                 # Log action (if any)
 878                 if( $rc_log_type ) {
 879                         if( $this->isDeleted($rcObj,LogPage::DELETED_ACTION) ) {
 880                                 $r .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 881                         } else {
 882                                 $r .= ' ' . LogPage::actionText( $rc_log_type, $rc_log_action, $rcObj->getTitle(),
 883                                         $this->skin, LogPage::extractParams($rc_params), true, true );
 884                         }
 885                 }
 886
 887                 # Edit or log comment
 888                 if( $rc_type != RC_MOVE && $rc_type != RC_MOVE_OVER_REDIRECT ) {
 889                         // log comment
 890                         if ( $this->isDeleted($rcObj,LogPage::DELETED_COMMENT) ) {
 891                            $r .= ' <span class="history-deleted">' . wfMsg('rev-deleted-comment') . '</span>';
 892                         } else {
 893                           $r .= $this->skin->commentBlock( $rc_comment, $rcObj->getTitle() );
 894                         }
 895                 }
 896
 897                 # Show how many people are watching this if enabled
 898                 $r .= $this->numberofWatchingusers($rcObj->numberofWatchingusers);
 899
 900                 $r .= "</td></tr></table>\n";
 901                 return $r;
 902         }
 903
 904         /**
 905          * If enhanced RC is in use, this function takes the previously cached
 906          * RC lines, arranges them, and outputs the HTML
 907          */
 908         protected function recentChangesBlock() {
 909                 if( count ( $this->rc_cache ) == 0 ) {
 910                         return '';
 911                 }
 912                 $blockOut = '';
 913                 foreach( $this->rc_cache as $block ) {
 914                         if( count( $block ) < 2 ) {
 915                                 $blockOut .= $this->recentChangesBlockLine( array_shift( $block ) );
 916                         } else {
 917                                 $blockOut .= $this->recentChangesBlockGroup( $block );
 918                         }
 919                 }
 920
 921                 return '<div>'.$blockOut.'</div>';
 922         }
 923
 924         /**
 925          * Returns text for the end of RC
 926          * If enhanced RC is in use, returns pretty much all the text
 927          */
 928         public function endRecentChangesList() {
 929                 return $this->recentChangesBlock() . parent::endRecentChangesList();
 930         }
 931
 932 }