includes/ChangesList.php

   1 <?php
   2
   3 /**
   4  * @todo document
   5  */
   6 class RCCacheEntry extends RecentChange {
   7         var $secureName, $link;
   8         var $curlink , $difflink, $lastlink, $usertalklink, $versionlink;
   9         var $userlink, $timestamp, $watched;
  10
  11         static function newFromParent( $rc ) {
  12                 $rc2 = new RCCacheEntry;
  13                 $rc2->mAttribs = $rc->mAttribs;
  14                 $rc2->mExtra = $rc->mExtra;
  15                 return $rc2;
  16         }
  17 }
  18
  19 /**
  20  * Class to show various lists of changes:
  21  * - what links here
  22  * - related changes
  23  * - recent changes
  24  */
  25 class ChangesList {
  26         # Called by history lists and recent changes
  27         public $skin;
  28         protected $watchlist = false;
  29
  30         /**
  31         * Changeslist contructor
  32         * @param Skin $skin
  33         */
  34         public function __construct( &$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' ) ?
  51                                 new EnhancedChangesList( $sk ) : new OldChangesList( $sk );
  52                 } else {
  53                         return $list;
  54                 }
  55         }
  56
  57         /**
  58          * Sets the list to use a <li class="watchlist-(namespace)-(page)"> tag
  59          * @param bool $value
  60          */
  61         public function setWatchlistDivs( $value = true ) {
  62                 $this->watchlist = $value;
  63         }
  64
  65         /**
  66          * As we use the same small set of messages in various methods and that
  67          * they are called often, we call them once and save them in $this->message
  68          */
  69         private function preCacheMessages() {
  70                 if( !isset( $this->message ) ) {
  71                         foreach( explode(' ', 'cur diff hist minoreditletter newpageletter last '.
  72                                 'blocklink history boteditletter semicolon-separator' ) as $msg ) {
  73                                 $this->message[$msg] = wfMsgExt( $msg, array( 'escapenoentities' ) );
  74                         }
  75                 }
  76         }
  77
  78
  79         /**
  80          * Returns the appropriate flags for new page, minor change and patrolling
  81          * @param bool $new
  82          * @param bool $minor
  83          * @param bool $patrolled
  84          * @param string $nothing, string to use for empty space
  85          * @param bool $bot
  86          * @return string
  87          */
  88         protected function recentChangesFlags( $new, $minor, $patrolled, $nothing = '&nbsp;', $bot = false ) {
  89                 $f = $new ?
  90                         '<span class="newpage">' . $this->message['newpageletter'] . '</span>' : $nothing;
  91                 $f .= $minor ?
  92                         '<span class="minor">' . $this->message['minoreditletter'] . '</span>' : $nothing;
  93                 $f .= $bot ? '<span class="bot">' . $this->message['boteditletter'] . '</span>' : $nothing;
  94                 $f .= $patrolled ? '<span class="unpatrolled">!</span>' : $nothing;
  95                 return $f;
  96         }
  97
  98         /**
  99          * Returns text for the start of the tabular part of RC
 100          * @return string
 101          */
 102         public function beginRecentChangesList() {
 103                 $this->rc_cache = array();
 104                 $this->rcMoveIndex = 0;
 105                 $this->rcCacheIndex = 0;
 106                 $this->lastdate = '';
 107                 $this->rclistOpen = false;
 108                 return '';
 109         }
 110
 111         /**
 112          * Show formatted char difference
 113          * @param int $old bytes
 114          * @param int $new bytes
 115          * @returns string
 116          */
 117         public static function showCharacterDifference( $old, $new ) {
 118                 global $wgRCChangedSizeThreshold, $wgLang, $wgMiserMode;
 119                 $szdiff = $new - $old;
 120
 121                 $code = $wgLang->getCode();
 122                 static $fastCharDiff = array();
 123                 if ( !isset($fastCharDiff[$code]) ) {
 124                         $fastCharDiff[$code] = $wgMiserMode || wfMsgNoTrans( 'rc-change-size' ) === '$1';
 125                 }
 126
 127                 $formatedSize = $wgLang->formatNum($szdiff);
 128
 129                 if ( !$fastCharDiff[$code] ) {
 130                         $formatedSize = wfMsgExt( 'rc-change-size', array( 'parsemag', 'escape' ), $formatedSize );
 131                 }
 132
 133                 if( abs( $szdiff ) > abs( $wgRCChangedSizeThreshold ) ) {
 134                         $tag = 'strong';
 135                 } else {
 136                     $tag = 'span';
 137                 }
 138                 if( $szdiff === 0 ) {
 139                         return "<$tag class='mw-plusminus-null'>($formatedSize)</$tag>";
 140                 } elseif( $szdiff > 0 ) {
 141                         return "<$tag class='mw-plusminus-pos'>(+$formatedSize)</$tag>";
 142             } else {
 143                         return "<$tag class='mw-plusminus-neg'>($formatedSize)</$tag>";
 144                 }
 145         }
 146
 147         /**
 148          * Returns text for the end of RC
 149          * @return string
 150          */
 151         public function endRecentChangesList() {
 152                 if( $this->rclistOpen ) {
 153                         return "</ul>\n";
 154                 } else {
 155                         return '';
 156                 }
 157         }
 158
 159         protected function insertMove( &$s, $rc ) {
 160                 # Diff
 161                 $s .= '(' . $this->message['diff'] . ') (';
 162                 # Hist
 163                 $s .= $this->skin->makeKnownLinkObj( $rc->getMovedToTitle(), $this->message['hist'],
 164                         'action=history' ) . ') . . ';
 165                 # "[[x]] moved to [[y]]"
 166                 $msg = ( $rc->mAttribs['rc_type'] == RC_MOVE ) ? '1movedto2' : '1movedto2_redir';
 167                 $s .= wfMsg( $msg, $this->skin->makeKnownLinkObj( $rc->getTitle(), '', 'redirect=no' ),
 168                         $this->skin->makeKnownLinkObj( $rc->getMovedToTitle(), '' ) );
 169         }
 170
 171         protected function insertDateHeader( &$s, $rc_timestamp ) {
 172                 global $wgLang;
 173                 # Make date header if necessary
 174                 $date = $wgLang->date( $rc_timestamp, true, true );
 175                 if( $date != $this->lastdate ) {
 176                         if( '' != $this->lastdate ) {
 177                                 $s .= "</ul>\n";
 178                         }
 179                         $s .= Xml::element( 'h4', null, $date ) . "\n<ul class=\"special\">";
 180                         $this->lastdate = $date;
 181                         $this->rclistOpen = true;
 182                 }
 183         }
 184
 185         protected function insertLog( &$s, $title, $logtype ) {
 186                 $logname = LogPage::logName( $logtype );
 187                 $s .= '(' . $this->skin->makeKnownLinkObj($title, $logname ) . ')';
 188         }
 189
 190         protected function insertDiffHist( &$s, &$rc, $unpatrolled ) {
 191                 # Diff link
 192                 if( $rc->mAttribs['rc_type'] == RC_NEW || $rc->mAttribs['rc_type'] == RC_LOG ) {
 193                         $diffLink = $this->message['diff'];
 194                 } else if( !$this->userCan($rc,Revision::DELETED_TEXT) ) {
 195                         $diffLink = $this->message['diff'];
 196                 } else {
 197                         $rcidparam = $unpatrolled ? array( 'rcid' => $rc->mAttribs['rc_id'] ) : array();
 198                         $diffLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['diff'],
 199                                 wfArrayToCGI( array(
 200                                         'curid' => $rc->mAttribs['rc_cur_id'],
 201                                         'diff'  => $rc->mAttribs['rc_this_oldid'],
 202                                         'oldid' => $rc->mAttribs['rc_last_oldid'] ),
 203                                         $rcidparam ),
 204                                 '', '', ' tabindex="'.$rc->counter.'"');
 205                 }
 206                 $s .= '('.$diffLink.') (';
 207                 # History link
 208                 $s .= $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['hist'],
 209                         wfArrayToCGI( array(
 210                                 'curid' => $rc->mAttribs['rc_cur_id'],
 211                                 'action' => 'history' ) ) );
 212                 $s .= ') . . ';
 213         }
 214
 215         protected function insertArticleLink( &$s, &$rc, $unpatrolled, $watched ) {
 216                 global $wgContLang;
 217                 # If it's a new article, there is no diff link, but if it hasn't been
 218                 # patrolled yet, we need to give users a way to do so
 219                 $params = ( $unpatrolled && $rc->mAttribs['rc_type'] == RC_NEW ) ?
 220                         'rcid='.$rc->mAttribs['rc_id'] : '';
 221                 if( $this->isDeleted($rc,Revision::DELETED_TEXT) ) {
 222                         $articlelink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '', $params );
 223                         $articlelink = '<span class="history-deleted">'.$articlelink.'</span>';
 224                 } else {
 225                     $articlelink = ' '. $this->skin->makeKnownLinkObj( $rc->getTitle(), '', $params );
 226                 }
 227                 # Bolden pages watched by this user
 228                 if( $watched ) {
 229                         $articlelink = "<strong class=\"mw-watched\">{$articlelink}</strong>";
 230                 }
 231                 # RTL/LTR marker
 232                 $articlelink .= $wgContLang->getDirMark();
 233
 234                 wfRunHooks( 'ChangesListInsertArticleLink',
 235                         array(&$this, &$articlelink, &$s, &$rc, $unpatrolled, $watched) );
 236
 237                 $s .= " $articlelink";
 238         }
 239
 240         protected function insertTimestamp( &$s, $rc ) {
 241                 global $wgLang;
 242                 $s .= $this->message['semicolon-separator'] .
 243                         $wgLang->time( $rc->mAttribs['rc_timestamp'], true, true ) . ' . . ';
 244         }
 245
 246         /** Insert links to user page, user talk page and eventually a blocking link */
 247         public function insertUserRelatedLinks( &$s, &$rc ) {
 248                 if( $this->isDeleted( $rc, Revision::DELETED_USER ) ) {
 249                    $s .= ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 250                 } else {
 251                   $s .= $this->skin->userLink( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 252                   $s .= $this->skin->userToolLinks( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 253                 }
 254         }
 255
 256         /** insert a formatted action */
 257         protected function insertAction( &$s, &$rc ) {
 258                 if( $rc->mAttribs['rc_type'] == RC_LOG ) {
 259                         if( $this->isDeleted( $rc, LogPage::DELETED_ACTION ) ) {
 260                                 $s .= ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-event' ) . '</span>';
 261                         } else {
 262                                 $s .= ' '.LogPage::actionText( $rc->mAttribs['rc_log_type'], $rc->mAttribs['rc_log_action'],
 263                                         $rc->getTitle(), $this->skin, LogPage::extractParams( $rc->mAttribs['rc_params'] ), true, true );
 264                         }
 265                 }
 266         }
 267
 268         /** insert a formatted comment */
 269         protected function insertComment( &$s, &$rc ) {
 270                 if( $rc->mAttribs['rc_type'] != RC_MOVE && $rc->mAttribs['rc_type'] != RC_MOVE_OVER_REDIRECT ) {
 271                         if( $this->isDeleted( $rc, Revision::DELETED_COMMENT ) ) {
 272                                 $s .= ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-comment' ) . '</span>';
 273                         } else {
 274                                 $s .= $this->skin->commentBlock( $rc->mAttribs['rc_comment'], $rc->getTitle() );
 275                         }
 276                 }
 277         }
 278
 279         /**
 280          * Check whether to enable recent changes patrol features
 281          * @return bool
 282          */
 283         public static function usePatrol() {
 284                 global $wgUser;
 285                 return $wgUser->useRCPatrol();
 286         }
 287
 288         /**
 289          * Returns the string which indicates the number of watching users
 290          */
 291         protected function numberofWatchingusers( $count ) {
 292                 global $wgLang;
 293                 static $cache = array();
 294                 if( $count > 0 ) {
 295                         if( !isset( $cache[$count] ) ) {
 296                                 $cache[$count] = wfMsgExt( 'number_of_watching_users_RCview',
 297                                         array('parsemag', 'escape' ), $wgLang->formatNum( $count ) );
 298                         }
 299                         return $cache[$count];
 300                 } else {
 301                         return '';
 302                 }
 303         }
 304
 305         /**
 306          * Determine if said field of a revision is hidden
 307          * @param RCCacheEntry $rc
 308          * @param int $field one of DELETED_* bitfield constants
 309          * @return bool
 310          */
 311         public static function isDeleted( $rc, $field ) {
 312                 return ( $rc->mAttribs['rc_deleted'] & $field ) == $field;
 313         }
 314
 315         /**
 316          * Determine if the current user is allowed to view a particular
 317          * field of this revision, if it's marked as deleted.
 318          * @param RCCacheEntry $rc
 319          * @param int $field
 320          * @return bool
 321          */
 322         public static function userCan( $rc, $field ) {
 323                 if( ( $rc->mAttribs['rc_deleted'] & $field ) == $field ) {
 324                         global $wgUser;
 325                         $permission = ( $rc->mAttribs['rc_deleted'] & Revision::DELETED_RESTRICTED ) == Revision::DELETED_RESTRICTED
 326                                 ? 'suppressrevision'
 327                                 : 'deleterevision';
 328                         wfDebug( "Checking for $permission due to $field match on {$rc->mAttribs['rc_deleted']}\n" );
 329                         return $wgUser->isAllowed( $permission );
 330                 } else {
 331                         return true;
 332                 }
 333         }
 334
 335         protected function maybeWatchedLink( $link, $watched=false ) {
 336                 if( $watched ) {
 337                         return '<strong class="mw-watched">' . $link . '</strong>';
 338                 } else {
 339                         return '<span class="mw-rc-unwatched">' . $link . '</span>';
 340                 }
 341         }
 342
 343         /** Inserts a rollback link */
 344         protected function insertRollback( &$s, &$rc ) {
 345                 global $wgUser;
 346                 if( !$rc->mAttribs['rc_new'] && $rc->mAttribs['rc_this_oldid'] && $rc->mAttribs['rc_cur_id'] ) {
 347                         $page = $rc->getTitle();
 348                         /** Check for rollback and edit permissions, disallow special pages, and only
 349                           * show a link on the top-most revision */
 350                         if ($wgUser->isAllowed('rollback') && $rc->mAttribs['page_latest'] == $rc->mAttribs['rc_this_oldid'] )
 351                         {
 352                                 $rev = new Revision( array(
 353                                         'id'        => $rc->mAttribs['rc_this_oldid'],
 354                                         'user'      => $rc->mAttribs['rc_user'],
 355                                         'user_text' => $rc->mAttribs['rc_user_text'],
 356                                         'deleted'   => $rc->mAttribs['rc_deleted']
 357                                 ) );
 358                                 $rev->setTitle( $page );
 359                                 $s .= ' '.$this->skin->generateRollback( $rev );
 360                         }
 361                 }
 362         }
 363
 364         protected function insertTags( &$s, &$rc, &$classes ) {
 365                 if ( empty($rc->mAttribs['ts_tags']) )
 366                         return;
 367
 368                 list($tagSummary, $newClasses) = ChangeTags::formatSummaryRow( $rc->mAttribs['ts_tags'], 'changeslist' );
 369                 $classes = array_merge( $classes, $newClasses );
 370                 $s .= ' ' . $tagSummary;
 371         }
 372
 373         protected function insertExtra( &$s, &$rc, &$classes ) {
 374                 ## Empty, used for subclassers to add anything special.
 375         }
 376 }
 377
 378
 379 /**
 380  * Generate a list of changes using the good old system (no javascript)
 381  */
 382 class OldChangesList extends ChangesList {
 383         /**
 384          * Format a line using the old system (aka without any javascript).
 385          */
 386         public function recentChangesLine( &$rc, $watched = false, $linenumber = NULL ) {
 387                 global $wgLang, $wgRCShowChangedSize, $wgUser;
 388                 wfProfileIn( __METHOD__ );
 389                 # Should patrol-related stuff be shown?
 390                 $unpatrolled = $wgUser->useRCPatrol() && !$rc->mAttribs['rc_patrolled'];
 391
 392                 $dateheader = ''; // $s now contains only <li>...</li>, for hooks' convenience.
 393                 $this->insertDateHeader( $dateheader, $rc->mAttribs['rc_timestamp'] );
 394
 395                 $s = '';
 396                 $classes = array();
 397                 // use mw-line-even/mw-line-odd class only if linenumber is given (feature from bug 14468)
 398                 if( $linenumber ) {
 399                         if( $linenumber & 1 ) {
 400                                 $classes[] = 'mw-line-odd';
 401                         }
 402                         else {
 403                                 $classes[] = 'mw-line-even';
 404                         }
 405                 }
 406
 407                 // Moved pages
 408                 if( $rc->mAttribs['rc_type'] == RC_MOVE || $rc->mAttribs['rc_type'] == RC_MOVE_OVER_REDIRECT ) {
 409                         $this->insertMove( $s, $rc );
 410                 // Log entries
 411                 } elseif( $rc->mAttribs['rc_log_type'] ) {
 412                         $logtitle = Title::newFromText( 'Log/'.$rc->mAttribs['rc_log_type'], NS_SPECIAL );
 413                         $this->insertLog( $s, $logtitle, $rc->mAttribs['rc_log_type'] );
 414                 // Log entries (old format) or log targets, and special pages
 415                 } elseif( $rc->mAttribs['rc_namespace'] == NS_SPECIAL ) {
 416                         list( $name, $subpage ) = SpecialPage::resolveAliasWithSubpage( $rc->mAttribs['rc_title'] );
 417                         if( $name == 'Log' ) {
 418                                 $this->insertLog( $s, $rc->getTitle(), $subpage );
 419                         }
 420                 // Regular entries
 421                 } else {
 422                         $this->insertDiffHist( $s, $rc, $unpatrolled );
 423                         # M, N, b and ! (minor, new, bot and unpatrolled)
 424                         $s .= $this->recentChangesFlags( $rc->mAttribs['rc_new'], $rc->mAttribs['rc_minor'],
 425                                 $unpatrolled, '', $rc->mAttribs['rc_bot'] );
 426                         $this->insertArticleLink( $s, $rc, $unpatrolled, $watched );
 427                 }
 428                 # Edit/log timestamp
 429                 $this->insertTimestamp( $s, $rc );
 430                 # Bytes added or removed
 431                 if( $wgRCShowChangedSize ) {
 432                         $cd = $rc->getCharacterDifference();
 433                         if( $cd != '' ) {
 434                                 $s .= "$cd  . . ";
 435                         }
 436                 }
 437                 # User tool links
 438                 $this->insertUserRelatedLinks( $s, $rc );
 439                 # Log action text (if any)
 440                 $this->insertAction( $s, $rc );
 441                 # Edit or log comment
 442                 $this->insertComment( $s, $rc );
 443                 # Tags
 444                 $this->insertTags( $s, $rc, $classes );
 445                 # Rollback
 446                 $this->insertRollback( $s, $rc );
 447                 # For subclasses
 448                 $this->insertExtra( $s, $rc, $classes );
 449
 450                 # Mark revision as deleted if so
 451                 if( !$rc->mAttribs['rc_log_type'] && $this->isDeleted($rc,Revision::DELETED_TEXT) ) {
 452                    $s .= ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 453                 }
 454                 # How many users watch this page
 455                 if( $rc->numberofWatchingusers > 0 ) {
 456                         $s .= ' ' . wfMsgExt( 'number_of_watching_users_RCview',
 457                                 array( 'parsemag', 'escape' ), $wgLang->formatNum( $rc->numberofWatchingusers ) );
 458                 }
 459
 460                 if( $this->watchlist ) {
 461                         $classes[] = Sanitizer::escapeClass( 'watchlist-'.$rc->mAttribs['rc_namespace'].'-'.$rc->mAttribs['rc_title'] );
 462                 }
 463
 464                 wfRunHooks( 'OldChangesListRecentChangesLine', array(&$this, &$s, $rc) );
 465
 466                 wfProfileOut( __METHOD__ );
 467                 return "$dateheader<li class=\"".implode( ' ', $classes )."\">".$s."</li>\n";
 468         }
 469 }
 470
 471
 472 /**
 473  * Generate a list of changes using an Enhanced system (uses javascript).
 474  */
 475 class EnhancedChangesList extends ChangesList {
 476         /**
 477         *  Add the JavaScript file for enhanced changeslist
 478         *  @ return string
 479         */
 480         public function beginRecentChangesList() {
 481                 global $wgStylePath, $wgJsMimeType, $wgStyleVersion;
 482                 $this->rc_cache = array();
 483                 $this->rcMoveIndex = 0;
 484                 $this->rcCacheIndex = 0;
 485                 $this->lastdate = '';
 486                 $this->rclistOpen = false;
 487                 $script = Xml::tags( 'script', array(
 488                         'type' => $wgJsMimeType,
 489                         'src' => $wgStylePath . "/common/enhancedchanges.js?$wgStyleVersion" ), '' );
 490                 return $script;
 491         }
 492         /**
 493          * Format a line for enhanced recentchange (aka with javascript and block of lines).
 494          */
 495         public function recentChangesLine( &$baseRC, $watched = false ) {
 496                 global $wgLang, $wgUser;
 497
 498                 wfProfileIn( __METHOD__ );
 499
 500                 # Create a specialised object
 501                 $rc = RCCacheEntry::newFromParent( $baseRC );
 502
 503                 # Extract fields from DB into the function scope (rc_xxxx variables)
 504                 // FIXME: Would be good to replace this extract() call with something
 505                 // that explicitly initializes variables.
 506                 extract( $rc->mAttribs );
 507                 $curIdEq = array( 'curid' => $rc_cur_id );
 508
 509                 # If it's a new day, add the headline and flush the cache
 510                 $date = $wgLang->date( $rc_timestamp, true );
 511                 $ret = '';
 512                 if( $date != $this->lastdate ) {
 513                         # Process current cache
 514                         $ret = $this->recentChangesBlock();
 515                         $this->rc_cache = array();
 516                         $ret .= Xml::element( 'h4', null, $date );
 517                         $this->lastdate = $date;
 518                 }
 519
 520                 # Should patrol-related stuff be shown?
 521                 if( $wgUser->useRCPatrol() ) {
 522                         $rc->unpatrolled = !$rc_patrolled;
 523                 } else {
 524                         $rc->unpatrolled = false;
 525                 }
 526
 527                 $showdifflinks = true;
 528                 # Make article link
 529                 // Page moves
 530                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 531                         $msg = ( $rc_type == RC_MOVE ) ? "1movedto2" : "1movedto2_redir";
 532                         $clink = wfMsg( $msg, $this->skin->linkKnown( $rc->getTitle(), null,
 533                                 array(), array( 'redirect' => 'no' ) ),
 534                                 $this->skin->linkKnown( $rc->getMovedToTitle() ) );
 535                 // New unpatrolled pages
 536                 } else if( $rc->unpatrolled && $rc_type == RC_NEW ) {
 537                         $clink = $this->skin->linkKnown( $rc->getTitle(), null, array(),
 538                                 array( 'rcid' => $rc_id ) );
 539                 // Log entries
 540                 } else if( $rc_type == RC_LOG ) {
 541                         if( $rc_log_type ) {
 542                                 $logtitle = SpecialPage::getTitleFor( 'Log', $rc_log_type );
 543                                 $clink = '(' . $this->skin->linkKnown( $logtitle,
 544                                         LogPage::logName($rc_log_type) ) . ')';
 545                         } else {
 546                                 $clink = $this->skin->link( $rc->getTitle() );
 547                         }
 548                         $watched = false;
 549                 // Log entries (old format) and special pages
 550                 } elseif( $rc_namespace == NS_SPECIAL ) {
 551                         list( $specialName, $logtype ) = SpecialPage::resolveAliasWithSubpage( $rc_title );
 552                         if ( $specialName == 'Log' ) {
 553                                 # Log updates, etc
 554                                 $logname = LogPage::logName( $logtype );
 555                                 $clink = '(' . $this->skin->linkKnown( $rc->getTitle(), $logname ) . ')';
 556                         } else {
 557                                 wfDebug( "Unexpected special page in recentchanges\n" );
 558                                 $clink = '';
 559                         }
 560                 // Edits
 561                 } else {
 562                         $clink = $this->skin->linkKnown( $rc->getTitle() );
 563                 }
 564
 565                 # Don't show unusable diff links
 566                 if ( !ChangesList::userCan($rc,Revision::DELETED_TEXT) ) {
 567                         $showdifflinks = false;
 568                 }
 569
 570                 $time = $wgLang->time( $rc_timestamp, true, true );
 571                 $rc->watched = $watched;
 572                 $rc->link = $clink;
 573                 $rc->timestamp = $time;
 574                 $rc->numberofWatchingusers = $baseRC->numberofWatchingusers;
 575
 576                 # Make "cur" and "diff" links.  Don't use link(), it's too slow if
 577                 # called too many times (50% of CPU time on RecentChanges!).
 578                 if( $rc->unpatrolled ) {
 579                         $rcIdQuery = array( 'rcid' => $rc_id );
 580                 } else {
 581                         $rcIdQuery = array();
 582                 }
 583                 $querycur = $curIdEq + array( 'diff' => '0', 'oldid' => $rc_this_oldid );
 584                 $querydiff = $curIdEq + array( 'diff' => $rc_this_oldid, 'oldid' =>
 585                         $rc_last_oldid ) + $rcIdQuery;
 586
 587                 if( !$showdifflinks ) {
 588                         $curLink = $this->message['cur'];
 589                         $diffLink = $this->message['diff'];
 590                 } else if( in_array( $rc_type, array(RC_NEW,RC_LOG,RC_MOVE,RC_MOVE_OVER_REDIRECT) ) ) {
 591                         if ( $rc_type != RC_NEW ) {
 592                                 $curLink = $this->message['cur'];
 593                         } else {
 594                                 $curUrl = htmlspecialchars( $rc->getTitle()->getLinkUrl( $querycur ) );
 595                                 $curLink = "<a href=\"$curUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['cur']}</a>";
 596                         }
 597                         $diffLink = $this->message['diff'];
 598                 } else {
 599                         $diffUrl = htmlspecialchars( $rc->getTitle()->getLinkUrl( $querydiff ) );
 600                         $curUrl = htmlspecialchars( $rc->getTitle()->getLinkUrl( $querycur ) );
 601                         $diffLink = "<a href=\"$diffUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['diff']}</a>";
 602                         $curLink = "<a href=\"$curUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['cur']}</a>";
 603                 }
 604
 605                 # Make "last" link
 606                 if( !$showdifflinks || !$rc_last_oldid ) {
 607                     $lastLink = $this->message['last'];
 608                 } else if( $rc_type == RC_LOG || $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 609                         $lastLink = $this->message['last'];
 610                 } else {
 611                         $lastLink = $this->skin->linkKnown( $rc->getTitle(), $this->message['last'],
 612                                 array(), $curIdEq + array('diff' => $rc_this_oldid, 'oldid' => $rc_last_oldid) + $rcIdQuery );
 613                 }
 614
 615                 # Make user links
 616                 if( $this->isDeleted($rc,Revision::DELETED_USER) ) {
 617                         $rc->userlink = ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 618                 } else {
 619                         $rc->userlink = $this->skin->userLink( $rc_user, $rc_user_text );
 620                         $rc->usertalklink = $this->skin->userToolLinks( $rc_user, $rc_user_text );
 621                 }
 622
 623                 $rc->lastlink = $lastLink;
 624                 $rc->curlink  = $curLink;
 625                 $rc->difflink = $diffLink;
 626
 627                 # Put accumulated information into the cache, for later display
 628                 # Page moves go on their own line
 629                 $title = $rc->getTitle();
 630                 $secureName = $title->getPrefixedDBkey();
 631                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 632                         # Use an @ character to prevent collision with page names
 633                         $this->rc_cache['@@' . ($this->rcMoveIndex++)] = array($rc);
 634                 } else {
 635                         # Logs are grouped by type
 636                         if( $rc_type == RC_LOG ){
 637                                 $secureName = SpecialPage::getTitleFor( 'Log', $rc_log_type )->getPrefixedDBkey();
 638                         }
 639                         if( !isset( $this->rc_cache[$secureName] ) ) {
 640                                 $this->rc_cache[$secureName] = array();
 641                         }
 642
 643                         array_push( $this->rc_cache[$secureName], $rc );
 644                 }
 645
 646                 wfProfileOut( __METHOD__ );
 647
 648                 return $ret;
 649         }
 650
 651         /**
 652          * Enhanced RC group
 653          */
 654         protected function recentChangesBlockGroup( $block ) {
 655                 global $wgLang, $wgContLang, $wgRCShowChangedSize;
 656
 657                 wfProfileIn( __METHOD__ );
 658
 659                 $r = '<table cellpadding="0" cellspacing="0" border="0" style="background: none"><tr>';
 660
 661                 # Collate list of users
 662                 $userlinks = array();
 663                 # Other properties
 664                 $unpatrolled = false;
 665                 $isnew = false;
 666                 $curId = $currentRevision = 0;
 667                 # Some catalyst variables...
 668                 $namehidden = true;
 669                 $allLogs = true;
 670                 foreach( $block as $rcObj ) {
 671                         $oldid = $rcObj->mAttribs['rc_last_oldid'];
 672                         if( $rcObj->mAttribs['rc_new'] ) {
 673                                 $isnew = true;
 674                         }
 675                         // If all log actions to this page were hidden, then don't
 676                         // give the name of the affected page for this block!
 677                         if( !$this->isDeleted( $rcObj, LogPage::DELETED_ACTION ) ) {
 678                                 $namehidden = false;
 679                         }
 680                         $u = $rcObj->userlink;
 681                         if( !isset( $userlinks[$u] ) ) {
 682                                 $userlinks[$u] = 0;
 683                         }
 684                         if( $rcObj->unpatrolled ) {
 685                                 $unpatrolled = true;
 686                         }
 687                         if( $rcObj->mAttribs['rc_type'] != RC_LOG ) {
 688                                 $allLogs = false;
 689                         }
 690                         # Get the latest entry with a page_id and oldid
 691                         # since logs may not have these.
 692                         if( !$curId && $rcObj->mAttribs['rc_cur_id'] ) {
 693                                 $curId = $rcObj->mAttribs['rc_cur_id'];
 694                         }
 695                         if( !$currentRevision && $rcObj->mAttribs['rc_this_oldid'] ) {
 696                                 $currentRevision = $rcObj->mAttribs['rc_this_oldid'];
 697                         }
 698
 699                         $bot = $rcObj->mAttribs['rc_bot'];
 700                         $userlinks[$u]++;
 701                 }
 702
 703                 # Sort the list and convert to text
 704                 krsort( $userlinks );
 705                 asort( $userlinks );
 706                 $users = array();
 707                 foreach( $userlinks as $userlink => $count) {
 708                         $text = $userlink;
 709                         $text .= $wgContLang->getDirMark();
 710                         if( $count > 1 ) {
 711                                 $text .= ' (' . $wgLang->formatNum( $count ) . '×)';
 712                         }
 713                         array_push( $users, $text );
 714                 }
 715
 716                 $users = ' <span class="changedby">[' .
 717                         implode( $this->message['semicolon-separator'], $users ) . ']</span>';
 718
 719                 # ID for JS visibility toggle
 720                 $jsid = $this->rcCacheIndex;
 721                 # onclick handler to toggle hidden/expanded
 722                 $toggleLink = "onclick='toggleVisibility($jsid); return false'";
 723                 # Title for <a> tags
 724                 $expandTitle = htmlspecialchars( wfMsg( 'rc-enhanced-expand' ) );
 725                 $closeTitle = htmlspecialchars( wfMsg( 'rc-enhanced-hide' ) );
 726
 727                 $tl = "<span id='mw-rc-openarrow-$jsid' class='mw-changeslist-expanded' style='visibility:hidden'><a href='#' $toggleLink title='$expandTitle'>" . $this->sideArrow() . "</a></span>";
 728                 $tl .= "<span id='mw-rc-closearrow-$jsid' class='mw-changeslist-hidden' style='display:none'><a href='#' $toggleLink title='$closeTitle'>" . $this->downArrow() . "</a></span>";
 729                 $r .= '<td valign="top" style="white-space: nowrap"><tt>'.$tl.'&nbsp;';
 730
 731                 # Main line
 732                 $r .= $this->recentChangesFlags( $isnew, false, $unpatrolled, '&nbsp;', $bot );
 733
 734                 # Timestamp
 735                 $r .= '&nbsp;'.$block[0]->timestamp.'&nbsp;</tt></td><td>';
 736
 737                 # Article link
 738                 if( $namehidden ) {
 739                         $r .= ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-event' ) . '</span>';
 740                 } else if( $allLogs ) {
 741                         $r .= $this->maybeWatchedLink( $block[0]->link, $block[0]->watched );
 742                 } else {
 743                         $this->insertArticleLink( $r, $block[0], $block[0]->unpatrolled, $block[0]->watched );
 744                 }
 745
 746                 $r .= $wgContLang->getDirMark();
 747
 748                 $curIdEq = 'curid=' . $curId;
 749                 # Changes message
 750                 $n = count($block);
 751                 static $nchanges = array();
 752                 if ( !isset( $nchanges[$n] ) ) {
 753                         $nchanges[$n] = wfMsgExt( 'nchanges', array( 'parsemag', 'escape' ), $wgLang->formatNum( $n ) );
 754                 }
 755                 # Total change link
 756                 $r .= ' ';
 757                 if( !$allLogs ) {
 758                         $r .= '(';
 759                         if( !ChangesList::userCan( $rcObj, Revision::DELETED_TEXT ) ) {
 760                                 $r .= $nchanges[$n];
 761                         } else if( $isnew ) {
 762                                 $r .= $nchanges[$n];
 763                         } else {
 764                                 $r .= $this->skin->makeKnownLinkObj( $block[0]->getTitle(),
 765                                         $nchanges[$n], $curIdEq."&diff=$currentRevision&oldid=$oldid" );
 766                         }
 767                 }
 768
 769                 # History
 770                 if( $allLogs ) {
 771                         // don't show history link for logs
 772                 } else if( $namehidden || !$block[0]->getTitle()->exists() ) {
 773                         $r .= $this->message['semicolon-separator'] . $this->message['hist'] . ')';
 774                 } else {
 775                         $r .= $this->message['semicolon-separator'] . $this->skin->makeKnownLinkObj( $block[0]->getTitle(),
 776                                 $this->message['hist'], $curIdEq . '&action=history' ) . ')';
 777                 }
 778                 $r .= ' . . ';
 779
 780                 # Character difference (does not apply if only log items)
 781                 if( $wgRCShowChangedSize && !$allLogs ) {
 782                         $last = 0;
 783                         $first = count($block) - 1;
 784                         # Some events (like logs) have an "empty" size, so we need to skip those...
 785                         while( $last < $first && $block[$last]->mAttribs['rc_new_len'] === NULL ) {
 786                                 $last++;
 787                         }
 788                         while( $first > $last && $block[$first]->mAttribs['rc_old_len'] === NULL ) {
 789                                 $first--;
 790                         }
 791                         # Get net change
 792                         $chardiff = $rcObj->getCharacterDifference( $block[$first]->mAttribs['rc_old_len'],
 793                                 $block[$last]->mAttribs['rc_new_len'] );
 794
 795                         if( $chardiff == '' ) {
 796                                 $r .= ' ';
 797                         } else {
 798                                 $r .= ' ' . $chardiff. ' . . ';
 799                         }
 800                 }
 801
 802                 $r .= $users;
 803                 $r .= $this->numberofWatchingusers($block[0]->numberofWatchingusers);
 804
 805                 $r .= "</td></tr></table>\n";
 806
 807                 # Sub-entries
 808                 $r .= '<div id="mw-rc-subentries-'.$jsid.'" class="mw-changeslist-hidden">';
 809                 $r .= '<table cellpadding="0" cellspacing="0"  border="0" style="background: none">';
 810                 foreach( $block as $rcObj ) {
 811                         # Extract fields from DB into the function scope (rc_xxxx variables)
 812                         // FIXME: Would be good to replace this extract() call with something
 813                         // that explicitly initializes variables.
 814                         # Classes to apply -- TODO implement
 815                         $classes = array();
 816                         extract( $rcObj->mAttribs );
 817
 818                         #$r .= '<tr><td valign="top">'.$this->spacerArrow();
 819                         $r .= '<tr><td valign="top">';
 820                         $r .= '<tt>'.$this->spacerIndent() . $this->spacerIndent();
 821                         $r .= $this->recentChangesFlags( $rc_new, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot );
 822                         $r .= '&nbsp;</tt></td><td valign="top">';
 823
 824                         $o = '';
 825                         if( $rc_this_oldid != 0 ) {
 826                                 $o = 'oldid='.$rc_this_oldid;
 827                         }
 828                         # Log timestamp
 829                         if( $rc_type == RC_LOG ) {
 830                                 $link = '<tt>'.$rcObj->timestamp.'</tt> ';
 831                         # Revision link
 832                         } else if( !ChangesList::userCan($rcObj,Revision::DELETED_TEXT) ) {
 833                                 $link = '<span class="history-deleted"><tt>'.$rcObj->timestamp.'</tt></span> ';
 834                         } else {
 835                                 $rcIdEq = ($rcObj->unpatrolled && $rc_type == RC_NEW) ?
 836                                         '&rcid='.$rcObj->mAttribs['rc_id'] : '';
 837                                 $link = '<tt>'.$this->skin->makeKnownLinkObj( $rcObj->getTitle(),
 838                                         $rcObj->timestamp, $curIdEq.'&'.$o.$rcIdEq ).'</tt>';
 839                                 if( $this->isDeleted($rcObj,Revision::DELETED_TEXT) )
 840                                         $link = '<span class="history-deleted">'.$link.'</span> ';
 841                         }
 842                         $r .= $link;
 843
 844                         if ( !$rc_type == RC_LOG || $rc_type == RC_NEW ) {
 845                                 $r .= ' (';
 846                                 $r .= $rcObj->curlink;
 847                                 $r .= $this->message['semicolon-separator'];
 848                                 $r .= $rcObj->lastlink;
 849                                 $r .= ')';
 850                         }
 851                         $r .= ' . . ';
 852
 853                         # Character diff
 854                         if( $wgRCShowChangedSize ) {
 855                                 $r .= ( $rcObj->getCharacterDifference() == '' ? '' : $rcObj->getCharacterDifference() . ' . . ' ) ;
 856                         }
 857                         # User links
 858                         $r .= $rcObj->userlink;
 859                         $r .= $rcObj->usertalklink;
 860                         // log action
 861                         $this->insertAction( $r, $rcObj );
 862                         // log comment
 863                         $this->insertComment( $r, $rcObj );
 864                         # Rollback
 865                         $this->insertRollback( $r, $rcObj );
 866                         # Tags
 867                         $this->insertTags( $r, $rcObj, $classes );
 868
 869                         # Mark revision as deleted
 870                         if( !$rc_log_type && $this->isDeleted($rcObj,Revision::DELETED_TEXT) ) {
 871                                 $r .= ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 872                         }
 873
 874                         $r .= "</td></tr>\n";
 875                 }
 876                 $r .= "</table></div>\n";
 877
 878                 $this->rcCacheIndex++;
 879
 880                 wfProfileOut( __METHOD__ );
 881
 882                 return $r;
 883         }
 884
 885         /**
 886          * Generate HTML for an arrow or placeholder graphic
 887          * @param string $dir one of '', 'd', 'l', 'r'
 888          * @param string $alt text
 889          * @param string $title text
 890          * @return string HTML <img> tag
 891          */
 892         protected function arrow( $dir, $alt='', $title='' ) {
 893                 global $wgStylePath;
 894                 $encUrl = htmlspecialchars( $wgStylePath . '/common/images/Arr_' . $dir . '.png' );
 895                 $encAlt = htmlspecialchars( $alt );
 896                 $encTitle = htmlspecialchars( $title );
 897                 return "<img src=\"$encUrl\" width=\"12\" height=\"12\" alt=\"$encAlt\" title=\"$encTitle\" />";
 898         }
 899
 900         /**
 901          * Generate HTML for a right- or left-facing arrow,
 902          * depending on language direction.
 903          * @return string HTML <img> tag
 904          */
 905         protected function sideArrow() {
 906                 global $wgContLang;
 907                 $dir = $wgContLang->isRTL() ? 'l' : 'r';
 908                 return $this->arrow( $dir, '+', wfMsg( 'rc-enhanced-expand' ) );
 909         }
 910
 911         /**
 912          * Generate HTML for a down-facing arrow
 913          * depending on language direction.
 914          * @return string HTML <img> tag
 915          */
 916         protected function downArrow() {
 917                 return $this->arrow( 'd', '-', wfMsg( 'rc-enhanced-hide' ) );
 918         }
 919
 920         /**
 921          * Generate HTML for a spacer image
 922          * @return string HTML <img> tag
 923          */
 924         protected function spacerArrow() {
 925                 return $this->arrow( '', codepointToUtf8( 0xa0 ) ); // non-breaking space
 926         }
 927
 928         /**
 929          * Add a set of spaces
 930          * @return string HTML <td> tag
 931          */
 932         protected function spacerIndent() {
 933                 return '&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;';
 934         }
 935
 936         /**
 937          * Enhanced RC ungrouped line.
 938          * @return string a HTML formated line (generated using $r)
 939          */
 940         protected function recentChangesBlockLine( $rcObj ) {
 941                 global $wgRCShowChangedSize;
 942
 943                 wfProfileIn( __METHOD__ );
 944
 945                 # Extract fields from DB into the function scope (rc_xxxx variables)
 946                 // FIXME: Would be good to replace this extract() call with something
 947                 // that explicitly initializes variables.
 948                 $classes = array(); // TODO implement
 949                 extract( $rcObj->mAttribs );
 950                 $curIdEq = "curid={$rc_cur_id}";
 951
 952                 $r = '<table cellspacing="0" cellpadding="0" border="0" style="background: none"><tr>';
 953                 $r .= '<td valign="top" style="white-space: nowrap"><tt>' . $this->spacerArrow() . '&nbsp;';
 954                 # Flag and Timestamp
 955                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 956                         $r .= '&nbsp;&nbsp;&nbsp;&nbsp;'; // 4 flags -> 4 spaces
 957                 } else {
 958                         $r .= $this->recentChangesFlags( $rc_type == RC_NEW, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot );
 959                 }
 960                 $r .= '&nbsp;'.$rcObj->timestamp.'&nbsp;</tt></td><td>';
 961                 # Article or log link
 962                 if( $rc_log_type ) {
 963                         $logtitle = Title::newFromText( "Log/$rc_log_type", NS_SPECIAL );
 964                         $logname = LogPage::logName( $rc_log_type );
 965                         $r .= '(' . $this->skin->makeKnownLinkObj($logtitle, $logname ) . ')';
 966                 } else {
 967                         $this->insertArticleLink( $r, $rcObj, $rcObj->unpatrolled, $rcObj->watched );
 968                 }
 969                 # Diff and hist links
 970                 if ( $rc_type != RC_LOG ) {
 971                         $r .= ' ('. $rcObj->difflink . $this->message['semicolon-separator'];
 972                         $r .= $this->skin->makeKnownLinkObj( $rcObj->getTitle(), $this->message['hist'],
 973                                 $curIdEq.'&action=history' ) . ')';
 974                 }
 975                 $r .= ' . . ';
 976                 # Character diff
 977                 if( $wgRCShowChangedSize && ($cd = $rcObj->getCharacterDifference()) ) {
 978                         $r .= "$cd . . ";
 979                 }
 980                 # User/talk
 981                 $r .= ' '.$rcObj->userlink . $rcObj->usertalklink;
 982                 # Log action (if any)
 983                 if( $rc_log_type ) {
 984                         if( $this->isDeleted($rcObj,LogPage::DELETED_ACTION) ) {
 985                                 $r .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 986                         } else {
 987                                 $r .= ' ' . LogPage::actionText( $rc_log_type, $rc_log_action, $rcObj->getTitle(),
 988                                         $this->skin, LogPage::extractParams($rc_params), true, true );
 989                         }
 990                 }
 991                 $this->insertComment( $r, $rcObj );
 992                 $this->insertRollback( $r, $rcObj );
 993                 # Tags
 994                 $this->insertTags( $r, $rcObj, $classes );
 995                 # Show how many people are watching this if enabled
 996                 $r .= $this->numberofWatchingusers($rcObj->numberofWatchingusers);
 997
 998                 $r .= "</td></tr></table>\n";
 999
1000                 wfProfileOut( __METHOD__ );
1001
1002                 return $r;
1003         }
1004
1005         /**
1006          * If enhanced RC is in use, this function takes the previously cached
1007          * RC lines, arranges them, and outputs the HTML
1008          */
1009         protected function recentChangesBlock() {
1010                 if( count ( $this->rc_cache ) == 0 ) {
1011                         return '';
1012                 }
1013
1014                 wfProfileIn( __METHOD__ );
1015
1016                 $blockOut = '';
1017                 foreach( $this->rc_cache as $block ) {
1018                         if( count( $block ) < 2 ) {
1019                                 $blockOut .= $this->recentChangesBlockLine( array_shift( $block ) );
1020                         } else {
1021                                 $blockOut .= $this->recentChangesBlockGroup( $block );
1022                         }
1023                 }
1024
1025                 wfProfileOut( __METHOD__ );
1026
1027                 return '<div>'.$blockOut.'</div>';
1028         }
1029
1030         /**
1031          * Returns text for the end of RC
1032          * If enhanced RC is in use, returns pretty much all the text
1033          */
1034         public function endRecentChangesList() {
1035                 return $this->recentChangesBlock() . parent::endRecentChangesList();
1036         }
1037
1038 }