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
  29         /**
  30         * Changeslist contructor
  31         * @param Skin $skin
  32         */
  33         public function __construct( &$skin ) {
  34                 $this->skin =& $skin;
  35                 $this->preCacheMessages();
  36         }
  37
  38         /**
  39          * Fetch an appropriate changes list class for the specified user
  40          * Some users might want to use an enhanced list format, for instance
  41          *
  42          * @param $user User to fetch the list class for
  43          * @return ChangesList derivative
  44          */
  45         public static function newFromUser( &$user ) {
  46                 $sk = $user->getSkin();
  47                 $list = NULL;
  48                 if( wfRunHooks( 'FetchChangesList', array( &$user, &$sk, &$list ) ) ) {
  49                         return $user->getOption( 'usenewrc' ) ?
  50                                 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                 if( !isset( $this->message ) ) {
  62                         foreach( explode(' ', 'cur diff hist minoreditletter newpageletter last '.
  63                                 'blocklink history boteditletter semicolon-separator' ) as $msg ) {
  64                                 $this->message[$msg] = wfMsgExt( $msg, array( 'escapenoentities' ) );
  65                         }
  66                 }
  67         }
  68
  69
  70         /**
  71          * Returns the appropriate flags for new page, minor change and patrolling
  72          * @param bool $new
  73          * @param bool $minor
  74          * @param bool $patrolled
  75          * @param string $nothing, string to use for empty space
  76          * @param bool $bot
  77          * @return string
  78          */
  79         protected function recentChangesFlags( $new, $minor, $patrolled, $nothing = '&nbsp;', $bot = false ) {
  80                 $f = $new ?
  81                         '<span class="newpage">' . $this->message['newpageletter'] . '</span>' : $nothing;
  82                 $f .= $minor ?
  83                         '<span class="minor">' . $this->message['minoreditletter'] . '</span>' : $nothing;
  84                 $f .= $bot ? '<span class="bot">' . $this->message['boteditletter'] . '</span>' : $nothing;
  85                 $f .= $patrolled ? '<span class="unpatrolled">!</span>' : $nothing;
  86                 return $f;
  87         }
  88
  89         /**
  90          * Returns text for the start of the tabular part of RC
  91          * @return string
  92          */
  93         public function beginRecentChangesList() {
  94                 $this->rc_cache = array();
  95                 $this->rcMoveIndex = 0;
  96                 $this->rcCacheIndex = 0;
  97                 $this->lastdate = '';
  98                 $this->rclistOpen = false;
  99                 return '';
 100         }
 101
 102         /**
 103          * Show formatted char difference
 104          * @param int $old bytes
 105          * @param int $new bytes
 106          * @returns string
 107          */
 108         public static function showCharacterDifference( $old, $new ) {
 109                 global $wgRCChangedSizeThreshold, $wgLang;
 110                 $szdiff = $new - $old;
 111                 $formatedSize = wfMsgExt( 'rc-change-size', array( 'parsemag', 'escape' ), $wgLang->formatNum( $szdiff ) );
 112                 if( abs( $szdiff ) > abs( $wgRCChangedSizeThreshold ) ) {
 113                         $tag = 'strong';
 114                 } else {
 115                     $tag = 'span';
 116                 }
 117                 if( $szdiff === 0 ) {
 118                         return "<$tag class='mw-plusminus-null'>($formatedSize)</$tag>";
 119                 } elseif( $szdiff > 0 ) {
 120                         return "<$tag class='mw-plusminus-pos'>(+$formatedSize)</$tag>";
 121             } else {
 122                         return "<$tag class='mw-plusminus-neg'>($formatedSize)</$tag>";
 123                 }
 124         }
 125
 126         /**
 127          * Returns text for the end of RC
 128          * @return string
 129          */
 130         public function endRecentChangesList() {
 131                 if( $this->rclistOpen ) {
 132                         return "</ul>\n";
 133                 } else {
 134                         return '';
 135                 }
 136         }
 137
 138         protected function insertMove( &$s, $rc ) {
 139                 # Diff
 140                 $s .= '(' . $this->message['diff'] . ') (';
 141                 # Hist
 142                 $s .= $this->skin->makeKnownLinkObj( $rc->getMovedToTitle(), $this->message['hist'],
 143                         'action=history' ) . ') . . ';
 144                 # "[[x]] moved to [[y]]"
 145                 $msg = ( $rc->mAttribs['rc_type'] == RC_MOVE ) ? '1movedto2' : '1movedto2_redir';
 146                 $s .= wfMsg( $msg, $this->skin->makeKnownLinkObj( $rc->getTitle(), '', 'redirect=no' ),
 147                         $this->skin->makeKnownLinkObj( $rc->getMovedToTitle(), '' ) );
 148         }
 149
 150         protected function insertDateHeader( &$s, $rc_timestamp ) {
 151                 global $wgLang;
 152                 # Make date header if necessary
 153                 $date = $wgLang->date( $rc_timestamp, true, true );
 154                 if( $date != $this->lastdate ) {
 155                         if( '' != $this->lastdate ) {
 156                                 $s .= "</ul>\n";
 157                         }
 158                         $s .= '<h4>'.$date."</h4>\n<ul class=\"special\">";
 159                         $this->lastdate = $date;
 160                         $this->rclistOpen = true;
 161                 }
 162         }
 163
 164         protected function insertLog( &$s, $title, $logtype ) {
 165                 $logname = LogPage::logName( $logtype );
 166                 $s .= '(' . $this->skin->makeKnownLinkObj($title, $logname ) . ')';
 167         }
 168
 169         protected function insertDiffHist( &$s, &$rc, $unpatrolled ) {
 170                 # Diff link
 171                 if( $rc->mAttribs['rc_type'] == RC_NEW || $rc->mAttribs['rc_type'] == RC_LOG ) {
 172                         $diffLink = $this->message['diff'];
 173                 } else if( !$this->userCan($rc,Revision::DELETED_TEXT) ) {
 174                         $diffLink = $this->message['diff'];
 175                 } else {
 176                         $rcidparam = $unpatrolled ? array( 'rcid' => $rc->mAttribs['rc_id'] ) : array();
 177                         $diffLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['diff'],
 178                                 wfArrayToCGI( array(
 179                                         'curid' => $rc->mAttribs['rc_cur_id'],
 180                                         'diff'  => $rc->mAttribs['rc_this_oldid'],
 181                                         'oldid' => $rc->mAttribs['rc_last_oldid'] ),
 182                                         $rcidparam ),
 183                                 '', '', ' tabindex="'.$rc->counter.'"');
 184                 }
 185                 $s .= '('.$diffLink.') (';
 186                 # History link
 187                 $s .= $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['hist'],
 188                         wfArrayToCGI( array(
 189                                 'curid' => $rc->mAttribs['rc_cur_id'],
 190                                 'action' => 'history' ) ) );
 191                 $s .= ') . . ';
 192         }
 193
 194         protected function insertArticleLink( &$s, &$rc, $unpatrolled, $watched ) {
 195                 global $wgContLang;
 196                 # If it's a new article, there is no diff link, but if it hasn't been
 197                 # patrolled yet, we need to give users a way to do so
 198                 $params = ( $unpatrolled && $rc->mAttribs['rc_type'] == RC_NEW ) ?
 199                         'rcid='.$rc->mAttribs['rc_id'] : '';
 200                 if( $this->isDeleted($rc,Revision::DELETED_TEXT) ) {
 201                         $articlelink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '', $params );
 202                         $articlelink = '<span class="history-deleted">'.$articlelink.'</span>';
 203                 } else {
 204                     $articlelink = ' '. $this->skin->makeKnownLinkObj( $rc->getTitle(), '', $params );
 205                 }
 206                 # Bolden pages watched by this user
 207                 if( $watched ) {
 208                         $articlelink = "<strong class=\"mw-watched\">{$articlelink}</strong>";
 209                 }
 210                 # RTL/LTR marker
 211                 $articlelink .= $wgContLang->getDirMark();
 212
 213                 wfRunHooks( 'ChangesListInsertArticleLink',
 214                         array(&$this, &$articlelink, &$s, &$rc, $unpatrolled, $watched) );
 215
 216                 $s .= " $articlelink";
 217         }
 218
 219         protected function insertTimestamp( &$s, $rc ) {
 220                 global $wgLang;
 221                 $s .= $this->message['semicolon-separator'] .
 222                         $wgLang->time( $rc->mAttribs['rc_timestamp'], true, true ) . ' . . ';
 223         }
 224
 225         /** Insert links to user page, user talk page and eventually a blocking link */
 226         public function insertUserRelatedLinks( &$s, &$rc ) {
 227                 if( $this->isDeleted( $rc, Revision::DELETED_USER ) ) {
 228                    $s .= ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 229                 } else {
 230                   $s .= $this->skin->userLink( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 231                   $s .= $this->skin->userToolLinks( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 232                 }
 233         }
 234
 235         /** insert a formatted action */
 236         protected function insertAction( &$s, &$rc ) {
 237                 if( $rc->mAttribs['rc_type'] == RC_LOG ) {
 238                         if( $this->isDeleted( $rc, LogPage::DELETED_ACTION ) ) {
 239                                 $s .= ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-event' ) . '</span>';
 240                         } else {
 241                                 $s .= ' '.LogPage::actionText( $rc->mAttribs['rc_log_type'], $rc->mAttribs['rc_log_action'],
 242                                         $rc->getTitle(), $this->skin, LogPage::extractParams( $rc->mAttribs['rc_params'] ), true, true );
 243                         }
 244                 }
 245         }
 246
 247         /** insert a formatted comment */
 248         protected function insertComment( &$s, &$rc ) {
 249                 if( $rc->mAttribs['rc_type'] != RC_MOVE && $rc->mAttribs['rc_type'] != RC_MOVE_OVER_REDIRECT ) {
 250                         if( $this->isDeleted( $rc, Revision::DELETED_COMMENT ) ) {
 251                                 $s .= ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-comment' ) . '</span>';
 252                         } else {
 253                                 $s .= $this->skin->commentBlock( $rc->mAttribs['rc_comment'], $rc->getTitle() );
 254                         }
 255                 }
 256         }
 257
 258         /**
 259          * Check whether to enable recent changes patrol features
 260          * @return bool
 261          */
 262         public static function usePatrol() {
 263                 global $wgUser;
 264                 return $wgUser->useRCPatrol();
 265         }
 266
 267         /**
 268          * Returns the string which indicates the number of watching users
 269          */
 270         protected function numberofWatchingusers( $count ) {
 271                 global $wgLang;
 272                 static $cache = array();
 273                 if( $count > 0 ) {
 274                         if( !isset( $cache[$count] ) ) {
 275                                 $cache[$count] = wfMsgExt( 'number_of_watching_users_RCview',
 276                                         array('parsemag', 'escape' ), $wgLang->formatNum( $count ) );
 277                         }
 278                         return $cache[$count];
 279                 } else {
 280                         return '';
 281                 }
 282         }
 283
 284         /**
 285          * Determine if said field of a revision is hidden
 286          * @param RCCacheEntry $rc
 287          * @param int $field one of DELETED_* bitfield constants
 288          * @return bool
 289          */
 290         public static function isDeleted( $rc, $field ) {
 291                 return ( $rc->mAttribs['rc_deleted'] & $field ) == $field;
 292         }
 293
 294         /**
 295          * Determine if the current user is allowed to view a particular
 296          * field of this revision, if it's marked as deleted.
 297          * @param RCCacheEntry $rc
 298          * @param int $field
 299          * @return bool
 300          */
 301         public static function userCan( $rc, $field ) {
 302                 if( ( $rc->mAttribs['rc_deleted'] & $field ) == $field ) {
 303                         global $wgUser;
 304                         $permission = ( $rc->mAttribs['rc_deleted'] & Revision::DELETED_RESTRICTED ) == Revision::DELETED_RESTRICTED
 305                                 ? 'suppressrevision'
 306                                 : 'deleterevision';
 307                         wfDebug( "Checking for $permission due to $field match on {$rc->mAttribs['rc_deleted']}\n" );
 308                         return $wgUser->isAllowed( $permission );
 309                 } else {
 310                         return true;
 311                 }
 312         }
 313
 314         protected function maybeWatchedLink( $link, $watched=false ) {
 315                 if( $watched ) {
 316                         return '<strong class="mw-watched">' . $link . '</strong>';
 317                 } else {
 318                         return '<span class="mw-rc-unwatched">' . $link . '</span>';
 319                 }
 320         }
 321
 322         /** Inserts a rollback link */
 323         protected function insertRollback( &$s, &$rc ) {
 324                 global $wgUser;
 325                 if( !$rc->mAttribs['rc_new'] && $rc->mAttribs['rc_this_oldid'] && $wgUser->isAllowed('rollback') ) {
 326                         $page = $rc->getTitle();
 327                         /** Check for rollback and edit permissions, disallow special pages, and only
 328                           * show a link on the top-most revision */
 329                         if( $rc->mAttribs['rc_cur_id'] > 0 && $page->userCan('rollback') && $page->userCan('edit')
 330                                 && $page->getLatestRevID() == $rc->mAttribs['rc_this_oldid'] )
 331                         {
 332                                 $rev = new Revision( array(
 333                                         'id'        => $rc->mAttribs['rc_this_oldid'],
 334                                         'user'      => $rc->mAttribs['rc_user'],
 335                                         'user_text' => $rc->mAttribs['rc_user_text']
 336                                 ) );
 337                                 $s .= ' '.$this->skin->generateRollback( $rev );
 338                         }
 339                 }
 340         }
 341
 342         protected function insertTags( &$s, &$rc, &$classes ) {
 343                 if ( empty($rc->mAttribs['ts_tags']) )
 344                         return;
 345
 346                 list($tagSummary, $newClasses) = ChangeTags::formatSummaryRow( $rc->mAttribs['ts_tags'], 'changeslist' );
 347                 $classes = array_merge( $classes, $newClasses );
 348                 $s .= ' ' . $tagSummary;
 349         }
 350 }
 351
 352
 353 /**
 354  * Generate a list of changes using the good old system (no javascript)
 355  */
 356 class OldChangesList extends ChangesList {
 357         /**
 358          * Format a line using the old system (aka without any javascript).
 359          */
 360         public function recentChangesLine( &$rc, $watched = false ) {
 361                 global $wgContLang, $wgLang, $wgRCShowChangedSize, $wgUser;
 362                 wfProfileIn( __METHOD__ );
 363                 # Should patrol-related stuff be shown?
 364                 $unpatrolled = $wgUser->useRCPatrol() && !$rc->mAttribs['rc_patrolled'];
 365
 366                 $dateheader = ''; // $s now contains only <li>...</li>, for hooks' convenience.
 367                 $this->insertDateHeader( $dateheader, $rc->mAttribs['rc_timestamp'] );
 368
 369                 $s = '';
 370                 $classes = array();
 371                 // Moved pages
 372                 if( $rc->mAttribs['rc_type'] == RC_MOVE || $rc->mAttribs['rc_type'] == RC_MOVE_OVER_REDIRECT ) {
 373                         $this->insertMove( $s, $rc );
 374                 // Log entries
 375                 } elseif( $rc->mAttribs['rc_log_type'] ) {
 376                         $logtitle = Title::newFromText( 'Log/'.$rc->mAttribs['rc_log_type'], NS_SPECIAL );
 377                         $this->insertLog( $s, $logtitle, $rc->mAttribs['rc_log_type'] );
 378                 // Log entries (old format) or log targets, and special pages
 379                 } elseif( $rc->mAttribs['rc_namespace'] == NS_SPECIAL ) {
 380                         list( $name, $subpage ) = SpecialPage::resolveAliasWithSubpage( $rc->mAttribs['rc_title'] );
 381                         if( $name == 'Log' ) {
 382                                 $this->insertLog( $s, $rc->getTitle(), $subpage );
 383                         }
 384                 // Regular entries
 385                 } else {
 386                         $this->insertDiffHist( $s, $rc, $unpatrolled );
 387                         # M, N, b and ! (minor, new, bot and unpatrolled)
 388                         $s .= $this->recentChangesFlags( $rc->mAttribs['rc_new'], $rc->mAttribs['rc_minor'],
 389                                 $unpatrolled, '', $rc->mAttribs['rc_bot'] );
 390                         $this->insertArticleLink( $s, $rc, $unpatrolled, $watched );
 391                 }
 392                 # Edit/log timestamp
 393                 $this->insertTimestamp( $s, $rc );
 394                 # Bytes added or removed
 395                 if( $wgRCShowChangedSize ) {
 396                         $cd = $rc->getCharacterDifference();
 397                         if( $cd != '' ) {
 398                                 $s .= "$cd  . . ";
 399                         }
 400                 }
 401                 # User tool links
 402                 $this->insertUserRelatedLinks( $s, $rc );
 403                 # Log action text (if any)
 404                 $this->insertAction( $s, $rc );
 405                 # Edit or log comment
 406                 $this->insertComment( $s, $rc );
 407                 # Tags
 408                 $this->insertTags( $s, $rc, $classes );
 409                 # Rollback
 410                 $this->insertRollback( $s, $rc );
 411                 # Mark revision as deleted if so
 412                 if( !$rc->mAttribs['rc_log_type'] && $this->isDeleted($rc,Revision::DELETED_TEXT) ) {
 413                    $s .= ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 414                 }
 415                 # How many users watch this page
 416                 if( $rc->numberofWatchingusers > 0 ) {
 417                         $s .= ' ' . wfMsgExt( 'number_of_watching_users_RCview',
 418                                 array( 'parsemag', 'escape' ), $wgLang->formatNum( $rc->numberofWatchingusers ) );
 419                 }
 420
 421                 wfRunHooks( 'OldChangesListRecentChangesLine', array(&$this, &$s, $rc) );
 422
 423                 wfProfileOut( __METHOD__ );
 424                 return "$dateheader<li class=\"".implode( ' ', $classes )."\">$s</li>\n";
 425         }
 426 }
 427
 428
 429 /**
 430  * Generate a list of changes using an Enhanced system (uses javascript).
 431  */
 432 class EnhancedChangesList extends ChangesList {
 433         /**
 434         *  Add the JavaScript file for enhanced changeslist
 435         *  @ return string
 436         */
 437         public function beginRecentChangesList() {
 438                 global $wgStylePath, $wgJsMimeType, $wgStyleVersion;
 439                 $this->rc_cache = array();
 440                 $this->rcMoveIndex = 0;
 441                 $this->rcCacheIndex = 0;
 442                 $this->lastdate = '';
 443                 $this->rclistOpen = false;
 444                 $script = Xml::tags( 'script', array(
 445                         'type' => $wgJsMimeType,
 446                         'src' => $wgStylePath . "/common/enhancedchanges.js?$wgStyleVersion" ), '' );
 447                 return $script;
 448         }
 449         /**
 450          * Format a line for enhanced recentchange (aka with javascript and block of lines).
 451          */
 452         public function recentChangesLine( &$baseRC, $watched = false ) {
 453                 global $wgLang, $wgContLang, $wgUser;
 454
 455                 # Create a specialised object
 456                 $rc = RCCacheEntry::newFromParent( $baseRC );
 457
 458                 # Extract fields from DB into the function scope (rc_xxxx variables)
 459                 // FIXME: Would be good to replace this extract() call with something
 460                 // that explicitly initializes variables.
 461                 extract( $rc->mAttribs );
 462                 $curIdEq = 'curid=' . $rc_cur_id;
 463
 464                 # If it's a new day, add the headline and flush the cache
 465                 $date = $wgLang->date( $rc_timestamp, true );
 466                 $ret = '';
 467                 if( $date != $this->lastdate ) {
 468                         # Process current cache
 469                         $ret = $this->recentChangesBlock();
 470                         $this->rc_cache = array();
 471                         $ret .= "<h4>{$date}</h4>\n";
 472                         $this->lastdate = $date;
 473                 }
 474
 475                 # Should patrol-related stuff be shown?
 476                 if( $wgUser->useRCPatrol() ) {
 477                         $rc->unpatrolled = !$rc_patrolled;
 478                 } else {
 479                         $rc->unpatrolled = false;
 480                 }
 481
 482                 $showdifflinks = true;
 483                 # Make article link
 484                 // Page moves
 485                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 486                         $msg = ( $rc_type == RC_MOVE ) ? "1movedto2" : "1movedto2_redir";
 487                         $clink = wfMsg( $msg, $this->skin->makeKnownLinkObj( $rc->getTitle(), '', 'redirect=no' ),
 488                           $this->skin->makeKnownLinkObj( $rc->getMovedToTitle(), '' ) );
 489                 // New unpatrolled pages
 490                 } else if( $rc->unpatrolled && $rc_type == RC_NEW ) {
 491                         $clink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '', "rcid={$rc_id}" );
 492                 // Log entries
 493                 } else if( $rc_type == RC_LOG ) {
 494                         if( $rc_log_type ) {
 495                                 $logtitle = SpecialPage::getTitleFor( 'Log', $rc_log_type );
 496                                 $clink = '(' . $this->skin->makeKnownLinkObj( $logtitle,
 497                                         LogPage::logName($rc_log_type) ) . ')';
 498                         } else {
 499                                 $clink = $this->skin->makeLinkObj( $rc->getTitle(), '' );
 500                         }
 501                         $watched = false;
 502                 // Log entries (old format) and special pages
 503                 } elseif( $rc_namespace == NS_SPECIAL ) {
 504                         list( $specialName, $logtype ) = SpecialPage::resolveAliasWithSubpage( $rc_title );
 505                         if ( $specialName == 'Log' ) {
 506                                 # Log updates, etc
 507                                 $logname = LogPage::logName( $logtype );
 508                                 $clink = '(' . $this->skin->makeKnownLinkObj( $rc->getTitle(), $logname ) . ')';
 509                         } else {
 510                                 wfDebug( "Unexpected special page in recentchanges\n" );
 511                                 $clink = '';
 512                         }
 513                 // Edits
 514                 } else {
 515                         $clink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '' );
 516                 }
 517
 518                 # Don't show unusable diff links
 519                 if ( !ChangesList::userCan($rc,Revision::DELETED_TEXT) ) {
 520                         $showdifflinks = false;
 521                 }
 522
 523                 $time = $wgContLang->time( $rc_timestamp, true, true );
 524                 $rc->watched = $watched;
 525                 $rc->link = $clink;
 526                 $rc->timestamp = $time;
 527                 $rc->numberofWatchingusers = $baseRC->numberofWatchingusers;
 528
 529                 # Make "cur" and "diff" links
 530                 if( $rc->unpatrolled ) {
 531                         $rcIdQuery = "&rcid={$rc_id}";
 532                 } else {
 533                         $rcIdQuery = '';
 534                 }
 535                 $querycur = $curIdEq."&diff=0&oldid=$rc_this_oldid";
 536                 $querydiff = $curIdEq."&diff=$rc_this_oldid&oldid=$rc_last_oldid$rcIdQuery";
 537                 $aprops = ' tabindex="'.$baseRC->counter.'"';
 538                 $curLink = $this->skin->makeKnownLinkObj( $rc->getTitle(),
 539                         $this->message['cur'], $querycur, '' ,'', $aprops );
 540
 541                 # Make "diff" an "cur" links
 542                 if( !$showdifflinks ) {
 543                    $curLink = $this->message['cur'];
 544                    $diffLink = $this->message['diff'];
 545                 } else if( in_array( $rc_type, array(RC_NEW,RC_LOG,RC_MOVE,RC_MOVE_OVER_REDIRECT) ) ) {
 546                         $curLink = ($rc_type != RC_NEW) ? $this->message['cur'] : $curLink;
 547                         $diffLink = $this->message['diff'];
 548                 } else {
 549                         $diffLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['diff'],
 550                                 $querydiff, '' ,'', $aprops );
 551                 }
 552
 553                 # Make "last" link
 554                 if( !$showdifflinks || !$rc_last_oldid ) {
 555                     $lastLink = $this->message['last'];
 556                 } else if( $rc_type == RC_LOG || $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 557                         $lastLink = $this->message['last'];
 558                 } else {
 559                         $lastLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['last'],
 560                         $curIdEq.'&diff='.$rc_this_oldid.'&oldid='.$rc_last_oldid . $rcIdQuery );
 561                 }
 562
 563                 # Make user links
 564                 if( $this->isDeleted($rc,Revision::DELETED_USER) ) {
 565                         $rc->userlink = ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 566                 } else {
 567                         $rc->userlink = $this->skin->userLink( $rc_user, $rc_user_text );
 568                         $rc->usertalklink = $this->skin->userToolLinks( $rc_user, $rc_user_text );
 569                 }
 570
 571                 $rc->lastlink = $lastLink;
 572                 $rc->curlink  = $curLink;
 573                 $rc->difflink = $diffLink;
 574
 575                 # Put accumulated information into the cache, for later display
 576                 # Page moves go on their own line
 577                 $title = $rc->getTitle();
 578                 $secureName = $title->getPrefixedDBkey();
 579                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 580                         # Use an @ character to prevent collision with page names
 581                         $this->rc_cache['@@' . ($this->rcMoveIndex++)] = array($rc);
 582                 } else {
 583                         # Logs are grouped by type
 584                         if( $rc_type == RC_LOG ){
 585                                 $secureName = SpecialPage::getTitleFor( 'Log', $rc_log_type )->getPrefixedDBkey();
 586                         }
 587                         if( !isset( $this->rc_cache[$secureName] ) ) {
 588                                 $this->rc_cache[$secureName] = array();
 589                         }
 590                         array_push( $this->rc_cache[$secureName], $rc );
 591                 }
 592                 return $ret;
 593         }
 594
 595         /**
 596          * Enhanced RC group
 597          */
 598         protected function recentChangesBlockGroup( $block ) {
 599                 global $wgLang, $wgContLang, $wgRCShowChangedSize;
 600                 $r = '<table cellpadding="0" cellspacing="0" border="0" style="background: none"><tr>';
 601
 602                 # Collate list of users
 603                 $userlinks = array();
 604                 # Other properties
 605                 $unpatrolled = false;
 606                 $isnew = false;
 607                 $curId = $currentRevision = 0;
 608                 # Some catalyst variables...
 609                 $namehidden = true;
 610                 $allLogs = true;
 611                 foreach( $block as $rcObj ) {
 612                         $oldid = $rcObj->mAttribs['rc_last_oldid'];
 613                         if( $rcObj->mAttribs['rc_new'] ) {
 614                                 $isnew = true;
 615                         }
 616                         // If all log actions to this page were hidden, then don't
 617                         // give the name of the affected page for this block!
 618                         if( !$this->isDeleted( $rcObj, LogPage::DELETED_ACTION ) ) {
 619                                 $namehidden = false;
 620                         }
 621                         $u = $rcObj->userlink;
 622                         if( !isset( $userlinks[$u] ) ) {
 623                                 $userlinks[$u] = 0;
 624                         }
 625                         if( $rcObj->unpatrolled ) {
 626                                 $unpatrolled = true;
 627                         }
 628                         if( $rcObj->mAttribs['rc_type'] != RC_LOG ) {
 629                                 $allLogs = false;
 630                         }
 631                         # Get the latest entry with a page_id and oldid
 632                         # since logs may not have these.
 633                         if( !$curId && $rcObj->mAttribs['rc_cur_id'] ) {
 634                                 $curId = $rcObj->mAttribs['rc_cur_id'];
 635                         }
 636                         if( !$currentRevision && $rcObj->mAttribs['rc_this_oldid'] ) {
 637                                 $currentRevision = $rcObj->mAttribs['rc_this_oldid'];
 638                         }
 639
 640                         $bot = $rcObj->mAttribs['rc_bot'];
 641                         $userlinks[$u]++;
 642                 }
 643
 644                 # Sort the list and convert to text
 645                 krsort( $userlinks );
 646                 asort( $userlinks );
 647                 $users = array();
 648                 foreach( $userlinks as $userlink => $count) {
 649                         $text = $userlink;
 650                         $text .= $wgContLang->getDirMark();
 651                         if( $count > 1 ) {
 652                                 $text .= ' (' . $wgLang->formatNum( $count ) . '×)';
 653                         }
 654                         array_push( $users, $text );
 655                 }
 656
 657                 $users = ' <span class="changedby">[' .
 658                         implode( $this->message['semicolon-separator'], $users ) . ']</span>';
 659
 660                 # ID for JS visibility toggle
 661                 $jsid = $this->rcCacheIndex;
 662                 # onclick handler to toggle hidden/expanded
 663                 $toggleLink = "onclick='toggleVisibility($jsid); return false'";
 664                 # Title for <a> tags
 665                 $expandTitle = htmlspecialchars( wfMsg( 'rc-enhanced-expand' ) );
 666                 $closeTitle = htmlspecialchars( wfMsg( 'rc-enhanced-hide' ) );
 667
 668                 $tl = "<span id='mw-rc-openarrow-$jsid' class='mw-changeslist-expanded' style='visibility:hidden'><a href='#' $toggleLink title='$expandTitle'>" . $this->sideArrow() . "</a></span>";
 669                 $tl .= "<span id='mw-rc-closearrow-$jsid' class='mw-changeslist-hidden' style='display:none'><a href='#' $toggleLink title='$closeTitle'>" . $this->downArrow() . "</a></span>";
 670                 $r .= '<td valign="top" style="white-space: nowrap"><tt>'.$tl.'&nbsp;';
 671
 672                 # Main line
 673                 $r .= $this->recentChangesFlags( $isnew, false, $unpatrolled, '&nbsp;', $bot );
 674
 675                 # Timestamp
 676                 $r .= '&nbsp;'.$block[0]->timestamp.'&nbsp;</tt></td><td>';
 677
 678                 # Article link
 679                 if( $namehidden ) {
 680                         $r .= ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-event' ) . '</span>';
 681                 } else if( $allLogs ) {
 682                         $r .= $this->maybeWatchedLink( $block[0]->link, $block[0]->watched );
 683                 } else {
 684                         $this->insertArticleLink( $r, $block[0], $block[0]->unpatrolled, $block[0]->watched );
 685                 }
 686
 687                 $r .= $wgContLang->getDirMark();
 688
 689                 $curIdEq = 'curid=' . $curId;
 690                 # Changes message
 691                 $n = count($block);
 692                 static $nchanges = array();
 693                 if ( !isset( $nchanges[$n] ) ) {
 694                         $nchanges[$n] = wfMsgExt( 'nchanges', array( 'parsemag', 'escape' ), $wgLang->formatNum( $n ) );
 695                 }
 696                 # Total change link
 697                 $r .= ' ';
 698                 if( !$allLogs ) {
 699                         $r .= '(';
 700                         if( !ChangesList::userCan( $rcObj, Revision::DELETED_TEXT ) ) {
 701                                 $r .= $nchanges[$n];
 702                         } else if( $isnew ) {
 703                                 $r .= $nchanges[$n];
 704                         } else {
 705                                 $r .= $this->skin->makeKnownLinkObj( $block[0]->getTitle(),
 706                                         $nchanges[$n], $curIdEq."&diff=$currentRevision&oldid=$oldid" );
 707                         }
 708                 }
 709
 710                 # History
 711                 if( $allLogs ) {
 712                         // don't show history link for logs
 713                 } else if( $namehidden || !$block[0]->getTitle()->exists() ) {
 714                         $r .= $this->message['semicolon-separator'] . $this->message['hist'] . ')';
 715                 } else {
 716                         $r .= $this->message['semicolon-separator'] . $this->skin->makeKnownLinkObj( $block[0]->getTitle(),
 717                                 $this->message['hist'], $curIdEq . '&action=history' ) . ')';
 718                 }
 719                 $r .= ' . . ';
 720
 721                 # Character difference (does not apply if only log items)
 722                 if( $wgRCShowChangedSize && !$allLogs ) {
 723                         $last = 0;
 724                         $first = count($block) - 1;
 725                         # Some events (like logs) have an "empty" size, so we need to skip those...
 726                         while( $last < $first && $block[$last]->mAttribs['rc_new_len'] === NULL ) {
 727                                 $last++;
 728                         }
 729                         while( $first > $last && $block[$first]->mAttribs['rc_old_len'] === NULL ) {
 730                                 $first--;
 731                         }
 732                         # Get net change
 733                         $chardiff = $rcObj->getCharacterDifference( $block[$first]->mAttribs['rc_old_len'],
 734                                 $block[$last]->mAttribs['rc_new_len'] );
 735
 736                         if( $chardiff == '' ) {
 737                                 $r .= ' ';
 738                         } else {
 739                                 $r .= ' ' . $chardiff. ' . . ';
 740                         }
 741                 }
 742
 743                 $r .= $users;
 744                 $r .= $this->numberofWatchingusers($block[0]->numberofWatchingusers);
 745
 746                 $r .= "</td></tr></table>\n";
 747
 748                 # Sub-entries
 749                 $r .= '<div id="mw-rc-subentries-'.$jsid.'" class="mw-changeslist-hidden">';
 750                 $r .= '<table cellpadding="0" cellspacing="0"  border="0" style="background: none">';
 751                 foreach( $block as $rcObj ) {
 752                         # Extract fields from DB into the function scope (rc_xxxx variables)
 753                         // FIXME: Would be good to replace this extract() call with something
 754                         // that explicitly initializes variables.
 755                         extract( $rcObj->mAttribs );
 756
 757                         #$r .= '<tr><td valign="top">'.$this->spacerArrow();
 758                         $r .= '<tr><td valign="top">';
 759                         $r .= '<tt>'.$this->spacerIndent() . $this->spacerIndent();
 760                         $r .= $this->recentChangesFlags( $rc_new, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot );
 761                         $r .= '&nbsp;</tt></td><td valign="top">';
 762
 763                         $o = '';
 764                         if( $rc_this_oldid != 0 ) {
 765                                 $o = 'oldid='.$rc_this_oldid;
 766                         }
 767                         # Log timestamp
 768                         if( $rc_type == RC_LOG ) {
 769                                 $link = '<tt>'.$rcObj->timestamp.'</tt> ';
 770                         # Revision link
 771                         } else if( !ChangesList::userCan($rcObj,Revision::DELETED_TEXT) ) {
 772                                 $link = '<span class="history-deleted"><tt>'.$rcObj->timestamp.'</tt></span> ';
 773                         } else {
 774                                 $rcIdEq = ($rcObj->unpatrolled && $rc_type == RC_NEW) ?
 775                                         '&rcid='.$rcObj->mAttribs['rc_id'] : '';
 776                                 $link = '<tt>'.$this->skin->makeKnownLinkObj( $rcObj->getTitle(),
 777                                         $rcObj->timestamp, $curIdEq.'&'.$o.$rcIdEq ).'</tt>';
 778                                 if( $this->isDeleted($rcObj,Revision::DELETED_TEXT) )
 779                                         $link = '<span class="history-deleted">'.$link.'</span> ';
 780                         }
 781                         $r .= $link;
 782
 783                         if ( !$rc_type == RC_LOG || $rc_type == RC_NEW ) {
 784                                 $r .= ' (';
 785                                 $r .= $rcObj->curlink;
 786                                 $r .= $this->message['semicolon-separator'];
 787                                 $r .= $rcObj->lastlink;
 788                                 $r .= ')';
 789                         }
 790                         $r .= ' . . ';
 791
 792                         # Character diff
 793                         if( $wgRCShowChangedSize ) {
 794                                 $r .= ( $rcObj->getCharacterDifference() == '' ? '' : $rcObj->getCharacterDifference() . ' . . ' ) ;
 795                         }
 796                         # User links
 797                         $r .= $rcObj->userlink;
 798                         $r .= $rcObj->usertalklink;
 799                         // log action
 800                         $this->insertAction( $r, $rcObj );
 801                         // log comment
 802                         $this->insertComment( $r, $rcObj );
 803                         # Rollback
 804                         $this->insertRollback( $r, $rcObj );
 805                         # Mark revision as deleted
 806                         if( !$rc_log_type && $this->isDeleted($rcObj,Revision::DELETED_TEXT) ) {
 807                                 $r .= ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 808                         }
 809
 810                         $r .= "</td></tr>\n";
 811                 }
 812                 $r .= "</table></div>\n";
 813
 814                 $this->rcCacheIndex++;
 815                 return $r;
 816         }
 817
 818         /**
 819          * Generate HTML for an arrow or placeholder graphic
 820          * @param string $dir one of '', 'd', 'l', 'r'
 821          * @param string $alt text
 822          * @param string $title text
 823          * @return string HTML <img> tag
 824          */
 825         protected function arrow( $dir, $alt='', $title='' ) {
 826                 global $wgStylePath;
 827                 $encUrl = htmlspecialchars( $wgStylePath . '/common/images/Arr_' . $dir . '.png' );
 828                 $encAlt = htmlspecialchars( $alt );
 829                 $encTitle = htmlspecialchars( $title );
 830                 return "<img src=\"$encUrl\" width=\"12\" height=\"12\" alt=\"$encAlt\" title=\"$encTitle\" />";
 831         }
 832
 833         /**
 834          * Generate HTML for a right- or left-facing arrow,
 835          * depending on language direction.
 836          * @return string HTML <img> tag
 837          */
 838         protected function sideArrow() {
 839                 global $wgContLang;
 840                 $dir = $wgContLang->isRTL() ? 'l' : 'r';
 841                 return $this->arrow( $dir, '+', wfMsg( 'rc-enhanced-expand' ) );
 842         }
 843
 844         /**
 845          * Generate HTML for a down-facing arrow
 846          * depending on language direction.
 847          * @return string HTML <img> tag
 848          */
 849         protected function downArrow() {
 850                 return $this->arrow( 'd', '-', wfMsg( 'rc-enhanced-hide' ) );
 851         }
 852
 853         /**
 854          * Generate HTML for a spacer image
 855          * @return string HTML <img> tag
 856          */
 857         protected function spacerArrow() {
 858                 return $this->arrow( '', codepointToUtf8( 0xa0 ) ); // non-breaking space
 859         }
 860
 861         /**
 862          * Add a set of spaces
 863          * @return string HTML <td> tag
 864          */
 865         protected function spacerIndent() {
 866                 return '&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;';
 867         }
 868
 869         /**
 870          * Enhanced RC ungrouped line.
 871          * @return string a HTML formated line (generated using $r)
 872          */
 873         protected function recentChangesBlockLine( $rcObj ) {
 874                 global $wgContLang, $wgRCShowChangedSize;
 875                 # Extract fields from DB into the function scope (rc_xxxx variables)
 876                 // FIXME: Would be good to replace this extract() call with something
 877                 // that explicitly initializes variables.
 878                 extract( $rcObj->mAttribs );
 879                 $curIdEq = "curid={$rc_cur_id}";
 880
 881                 $r = '<table cellspacing="0" cellpadding="0" border="0" style="background: none"><tr>';
 882                 $r .= '<td valign="top" style="white-space: nowrap"><tt>' . $this->spacerArrow() . '&nbsp;';
 883                 # Flag and Timestamp
 884                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 885                         $r .= '&nbsp;&nbsp;&nbsp;&nbsp;'; // 4 flags -> 4 spaces
 886                 } else {
 887                         $r .= $this->recentChangesFlags( $rc_type == RC_NEW, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot );
 888                 }
 889                 $r .= '&nbsp;'.$rcObj->timestamp.'&nbsp;</tt></td><td>';
 890                 # Article or log link
 891                 if( $rc_log_type ) {
 892                         $logtitle = Title::newFromText( "Log/$rc_log_type", NS_SPECIAL );
 893                         $logname = LogPage::logName( $rc_log_type );
 894                         $r .= '(' . $this->skin->makeKnownLinkObj($logtitle, $logname ) . ')';
 895                 } else {
 896                         $this->insertArticleLink( $r, $rcObj, $rcObj->unpatrolled, $rcObj->watched );
 897                 }
 898                 # Diff and hist links
 899                 if ( $rc_type != RC_LOG ) {
 900                         $r .= ' ('. $rcObj->difflink . $this->message['semicolon-separator'];
 901                         $r .= $this->skin->makeKnownLinkObj( $rcObj->getTitle(), $this->message['hist'],
 902                                 $curIdEq.'&action=history' ) . ')';
 903                 }
 904                 $r .= ' . . ';
 905                 # Character diff
 906                 if( $wgRCShowChangedSize && ($cd = $rcObj->getCharacterDifference()) ) {
 907                         $r .= "$cd . . ";
 908                 }
 909                 # User/talk
 910                 $r .= ' '.$rcObj->userlink . $rcObj->usertalklink;
 911                 # Log action (if any)
 912                 if( $rc_log_type ) {
 913                         if( $this->isDeleted($rcObj,LogPage::DELETED_ACTION) ) {
 914                                 $r .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 915                         } else {
 916                                 $r .= ' ' . LogPage::actionText( $rc_log_type, $rc_log_action, $rcObj->getTitle(),
 917                                         $this->skin, LogPage::extractParams($rc_params), true, true );
 918                         }
 919                 }
 920                 $this->insertComment( $r, $rcObj );
 921                 $this->insertRollback( $r, $rcObj );
 922                 # Show how many people are watching this if enabled
 923                 $r .= $this->numberofWatchingusers($rcObj->numberofWatchingusers);
 924
 925                 $r .= "</td></tr></table>\n";
 926                 return $r;
 927         }
 928
 929         /**
 930          * If enhanced RC is in use, this function takes the previously cached
 931          * RC lines, arranges them, and outputs the HTML
 932          */
 933         protected function recentChangesBlock() {
 934                 if( count ( $this->rc_cache ) == 0 ) {
 935                         return '';
 936                 }
 937                 $blockOut = '';
 938                 foreach( $this->rc_cache as $block ) {
 939                         if( count( $block ) < 2 ) {
 940                                 $blockOut .= $this->recentChangesBlockLine( array_shift( $block ) );
 941                         } else {
 942                                 $blockOut .= $this->recentChangesBlockGroup( $block );
 943                         }
 944                 }
 945                 return '<div>'.$blockOut.'</div>';
 946         }
 947
 948         /**
 949          * Returns text for the end of RC
 950          * If enhanced RC is in use, returns pretty much all the text
 951          */
 952         public function endRecentChangesList() {
 953                 return $this->recentChangesBlock() . parent::endRecentChangesList();
 954         }
 955
 956 }