includes/ChangesList.php

   1 <?php
   2 /**
   3  * Classes to show various lists of changes:
   4  * - watchlist
   5  * - related changes
   6  * - recent changes
   7  *
   8  * @file
   9  */
  10
  11 /**
  12  * @todo document
  13  */
  14 class RCCacheEntry extends RecentChange {
  15         var $secureName, $link;
  16         var $curlink , $difflink, $lastlink, $usertalklink, $versionlink;
  17         var $userlink, $timestamp, $watched;
  18
  19         /**
  20          * @param $rc RecentChange
  21          * @return RCCacheEntry
  22          */
  23         static function newFromParent( $rc ) {
  24                 $rc2 = new RCCacheEntry;
  25                 $rc2->mAttribs = $rc->mAttribs;
  26                 $rc2->mExtra = $rc->mExtra;
  27                 return $rc2;
  28         }
  29 }
  30
  31 /**
  32  * Base class for all changes lists
  33  */
  34 class ChangesList extends ContextSource {
  35
  36         /**
  37          * @var Skin
  38          */
  39         public $skin;
  40
  41         protected $watchlist = false;
  42
  43         protected $message;
  44
  45         /**
  46          * Changeslist contructor
  47          *
  48          * @param $obj Skin or IContextSource
  49          */
  50         public function __construct( $obj ) {
  51                 if ( $obj instanceof IContextSource ) {
  52                         $this->setContext( $obj );
  53                         $this->skin = $obj->getSkin();
  54                 } else {
  55                         $this->setContext( $obj->getContext() );
  56                         $this->skin = $obj;
  57                 }
  58                 $this->preCacheMessages();
  59         }
  60
  61         /**
  62          * Fetch an appropriate changes list class for the main context
  63          * This first argument used to be an User object.
  64          *
  65          * @deprecated in 1.18; use newFromContext() instead
  66          * @param $unused Unused
  67          * @return ChangesList|EnhancedChangesList|OldChangesList derivative
  68          */
  69         public static function newFromUser( $unused ) {
  70                 return self::newFromContext( RequestContext::getMain() );
  71         }
  72
  73         /**
  74          * Fetch an appropriate changes list class for the specified context
  75          * Some users might want to use an enhanced list format, for instance
  76          *
  77          * @param $context IContextSource to use
  78          * @return ChangesList|EnhancedChangesList|OldChangesList derivative
  79          */
  80         public static function newFromContext( IContextSource $context ) {
  81                 $user = $context->getUser();
  82                 $sk = $context->getSkin();
  83                 $list = null;
  84                 if( wfRunHooks( 'FetchChangesList', array( $user, &$sk, &$list ) ) ) {
  85                         $new = $context->getRequest()->getBool( 'enhanced', $user->getOption( 'usenewrc' ) );
  86                         return $new ? new EnhancedChangesList( $context ) : new OldChangesList( $context );
  87                 } else {
  88                         return $list;
  89                 }
  90         }
  91
  92         /**
  93          * Sets the list to use a <li class="watchlist-(namespace)-(page)"> tag
  94          * @param $value Boolean
  95          */
  96         public function setWatchlistDivs( $value = true ) {
  97                 $this->watchlist = $value;
  98         }
  99
 100         /**
 101          * As we use the same small set of messages in various methods and that
 102          * they are called often, we call them once and save them in $this->message
 103          */
 104         private function preCacheMessages() {
 105                 if( !isset( $this->message ) ) {
 106                         foreach ( explode( ' ', 'cur diff hist last blocklink history ' .
 107                         'semicolon-separator pipe-separator' ) as $msg ) {
 108                                 $this->message[$msg] = wfMsgExt( $msg, array( 'escapenoentities' ) );
 109                         }
 110                 }
 111         }
 112
 113         /**
 114          * Returns the appropriate flags for new page, minor change and patrolling
 115          * @param $flags Array Associative array of 'flag' => Bool
 116          * @param $nothing String to use for empty space
 117          * @return String
 118          */
 119         protected function recentChangesFlags( $flags, $nothing = '&#160;' ) {
 120                 $f = '';
 121                 foreach( array( 'newpage', 'minor', 'bot', 'unpatrolled' ) as $flag ){
 122                         $f .= isset( $flags[$flag] ) && $flags[$flag]
 123                                 ? self::flag( $flag )
 124                                 : $nothing;
 125                 }
 126                 return $f;
 127         }
 128
 129         /**
 130          * Provide the <abbr> element appropriate to a given abbreviated flag,
 131          * namely the flag indicating a new page, a minor edit, a bot edit, or an
 132          * unpatrolled edit.  By default in English it will contain "N", "m", "b",
 133          * "!" respectively, plus it will have an appropriate title and class.
 134          *
 135          * @param $flag String: 'newpage', 'unpatrolled', 'minor', or 'bot'
 136          * @return String: Raw HTML
 137          */
 138         public static function flag( $flag ) {
 139                 static $messages = null;
 140                 if ( is_null( $messages ) ) {
 141                         $messages = array(
 142                                 'newpage' => array( 'newpageletter', 'recentchanges-label-newpage' ),
 143                                 'minoredit' => array( 'minoreditletter', 'recentchanges-label-minor' ),
 144                                 'botedit' => array( 'boteditletter', 'recentchanges-label-bot' ),
 145                                 'unpatrolled' => array( 'unpatrolledletter', 'recentchanges-label-unpatrolled' ),
 146                         );
 147                         foreach( $messages as &$value ) {
 148                                 $value[0] = wfMsgExt( $value[0], 'escapenoentities' );
 149                                 $value[1] = wfMsgExt( $value[1], 'escapenoentities' );
 150                         }
 151                 }
 152
 153                 # Inconsistent naming, bleh
 154                 $map = array(
 155                         'newpage' => 'newpage',
 156                         'minor' => 'minoredit',
 157                         'bot' => 'botedit',
 158                         'unpatrolled' => 'unpatrolled',
 159                         'minoredit' => 'minoredit',
 160                         'botedit' => 'botedit',
 161                 );
 162                 $flag = $map[$flag];
 163
 164                 return "<abbr class='$flag' title='" . $messages[$flag][1] . "'>" . $messages[$flag][0] . '</abbr>';
 165         }
 166
 167         /**
 168          * Returns text for the start of the tabular part of RC
 169          * @return String
 170          */
 171         public function beginRecentChangesList() {
 172                 $this->rc_cache = array();
 173                 $this->rcMoveIndex = 0;
 174                 $this->rcCacheIndex = 0;
 175                 $this->lastdate = '';
 176                 $this->rclistOpen = false;
 177                 return '';
 178         }
 179
 180         /**
 181          * Show formatted char difference
 182          * @param $old Integer: bytes
 183          * @param $new Integer: bytes
 184          * @return String
 185          */
 186         public static function showCharacterDifference( $old, $new ) {
 187                 global $wgRCChangedSizeThreshold, $wgLang, $wgMiserMode;
 188                 $szdiff = $new - $old;
 189
 190                 $code = $wgLang->getCode();
 191                 static $fastCharDiff = array();
 192                 if ( !isset($fastCharDiff[$code]) ) {
 193                         $fastCharDiff[$code] = $wgMiserMode || wfMsgNoTrans( 'rc-change-size' ) === '$1';
 194                 }
 195
 196                 $formatedSize = $wgLang->formatNum($szdiff);
 197
 198                 if ( !$fastCharDiff[$code] ) {
 199                         $formatedSize = wfMsgExt( 'rc-change-size', array( 'parsemag', 'escape' ), $formatedSize );
 200                 }
 201
 202                 if( abs( $szdiff ) > abs( $wgRCChangedSizeThreshold ) ) {
 203                         $tag = 'strong';
 204                 } else {
 205                         $tag = 'span';
 206                 }
 207                 if( $szdiff === 0 ) {
 208                         return "<$tag class='mw-plusminus-null'>($formatedSize)</$tag>";
 209                 } elseif( $szdiff > 0 ) {
 210                         return "<$tag class='mw-plusminus-pos'>(+$formatedSize)</$tag>";
 211                 } else {
 212                         return "<$tag class='mw-plusminus-neg'>($formatedSize)</$tag>";
 213                 }
 214         }
 215
 216         /**
 217          * Returns text for the end of RC
 218          * @return String
 219          */
 220         public function endRecentChangesList() {
 221                 if( $this->rclistOpen ) {
 222                         return "</ul>\n";
 223                 } else {
 224                         return '';
 225                 }
 226         }
 227
 228         public function insertDateHeader( &$s, $rc_timestamp ) {
 229                 # Make date header if necessary
 230                 $date = $this->getLang()->date( $rc_timestamp, true, true );
 231                 if( $date != $this->lastdate ) {
 232                         if( $this->lastdate != '' ) {
 233                                 $s .= "</ul>\n";
 234                         }
 235                         $s .= Xml::element( 'h4', null, $date ) . "\n<ul class=\"special\">";
 236                         $this->lastdate = $date;
 237                         $this->rclistOpen = true;
 238                 }
 239         }
 240
 241         public function insertLog( &$s, $title, $logtype ) {
 242                 $page = new LogPage( $logtype );
 243                 $logname = $page->getName()->escaped();
 244                 $s .= '(' . Linker::linkKnown( $title, $logname ) . ')';
 245         }
 246
 247         /**
 248          * @param $s
 249          * @param $rc RecentChange
 250          * @param $unpatrolled
 251          * @return void
 252          */
 253         public function insertDiffHist( &$s, &$rc, $unpatrolled ) {
 254                 # Diff link
 255                 if( $rc->mAttribs['rc_type'] == RC_NEW || $rc->mAttribs['rc_type'] == RC_LOG ) {
 256                         $diffLink = $this->message['diff'];
 257                 } elseif( !self::userCan($rc,Revision::DELETED_TEXT) ) {
 258                         $diffLink = $this->message['diff'];
 259                 } else {
 260                         $query = array(
 261                                 'curid' => $rc->mAttribs['rc_cur_id'],
 262                                 'diff'  => $rc->mAttribs['rc_this_oldid'],
 263                                 'oldid' => $rc->mAttribs['rc_last_oldid']
 264                         );
 265
 266                         if( $unpatrolled ) {
 267                                 $query['rcid'] = $rc->mAttribs['rc_id'];
 268                         };
 269
 270                         $diffLink = Linker::linkKnown(
 271                                 $rc->getTitle(),
 272                                 $this->message['diff'],
 273                                 array( 'tabindex' => $rc->counter ),
 274                                 $query
 275                         );
 276                 }
 277                 $s .= '(' . $diffLink . $this->message['pipe-separator'];
 278                 # History link
 279                 $s .= Linker::linkKnown(
 280                         $rc->getTitle(),
 281                         $this->message['hist'],
 282                         array(),
 283                         array(
 284                                 'curid' => $rc->mAttribs['rc_cur_id'],
 285                                 'action' => 'history'
 286                         )
 287                 );
 288                 $s .= ') . . ';
 289         }
 290
 291         /**
 292          * @param $s
 293          * @param $rc RecentChange
 294          * @param $unpatrolled
 295          * @param $watched
 296          * @return void
 297          */
 298         public function insertArticleLink( &$s, &$rc, $unpatrolled, $watched ) {
 299                 # If it's a new article, there is no diff link, but if it hasn't been
 300                 # patrolled yet, we need to give users a way to do so
 301                 $params = array();
 302
 303                 if ( $unpatrolled && $rc->mAttribs['rc_type'] == RC_NEW ) {
 304                         $params['rcid'] = $rc->mAttribs['rc_id'];
 305                 }
 306
 307                 if( $this->isDeleted($rc,Revision::DELETED_TEXT) ) {
 308                         $articlelink = Linker::linkKnown(
 309                                 $rc->getTitle(),
 310                                 null,
 311                                 array(),
 312                                 $params
 313                         );
 314                         $articlelink = '<span class="history-deleted">' . $articlelink . '</span>';
 315                 } else {
 316                         $articlelink = ' '. Linker::linkKnown(
 317                                 $rc->getTitle(),
 318                                 null,
 319                                 array(),
 320                                 $params
 321                         );
 322                 }
 323                 # Bolden pages watched by this user
 324                 if( $watched ) {
 325                         $articlelink = "<strong class=\"mw-watched\">{$articlelink}</strong>";
 326                 }
 327                 # RTL/LTR marker
 328                 $articlelink .= $this->getLang()->getDirMark();
 329
 330                 wfRunHooks( 'ChangesListInsertArticleLink',
 331                         array(&$this, &$articlelink, &$s, &$rc, $unpatrolled, $watched) );
 332
 333                 $s .= " $articlelink";
 334         }
 335
 336         /**
 337          * @param $s
 338          * @param $rc RecentChange
 339          * @return void
 340          */
 341         public function insertTimestamp( &$s, $rc ) {
 342                 $s .= $this->message['semicolon-separator'] .
 343                         $this->getLang()->time( $rc->mAttribs['rc_timestamp'], true, true ) . ' . . ';
 344         }
 345
 346         /** Insert links to user page, user talk page and eventually a blocking link
 347          *
 348          * @param $rc RecentChange
 349          */
 350         public function insertUserRelatedLinks( &$s, &$rc ) {
 351                 if( $this->isDeleted( $rc, Revision::DELETED_USER ) ) {
 352                         $s .= ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 353                 } else {
 354                         $s .= Linker::userLink( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 355                         $s .= Linker::userToolLinks( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 356                 }
 357         }
 358
 359         /** insert a formatted action
 360          *
 361          * @param $rc RecentChange
 362          */
 363         public function insertLogEntry( $rc ) {
 364                 $formatter = LogFormatter::newFromRow( $rc->mAttribs );
 365                 $formatter->setShowUserToolLinks( true );
 366                 $mark = $this->getLang()->getDirMark();
 367                 return $formatter->getActionText() . " $mark" . $formatter->getComment();
 368         }
 369
 370         /**
 371          * Check whether to enable recent changes patrol features
 372          * @return Boolean
 373          */
 374         public static function usePatrol() {
 375                 global $wgUser;
 376                 return $wgUser->useRCPatrol();
 377         }
 378
 379         /**
 380          * Returns the string which indicates the number of watching users
 381          */
 382         protected function numberofWatchingusers( $count ) {
 383                 static $cache = array();
 384                 if( $count > 0 ) {
 385                         if( !isset( $cache[$count] ) ) {
 386                                 $cache[$count] = wfMsgExt( 'number_of_watching_users_RCview',
 387                                         array('parsemag', 'escape' ), $this->getLang()->formatNum( $count ) );
 388                         }
 389                         return $cache[$count];
 390                 } else {
 391                         return '';
 392                 }
 393         }
 394
 395         /**
 396          * Determine if said field of a revision is hidden
 397          * @param $rc RCCacheEntry
 398          * @param $field Integer: one of DELETED_* bitfield constants
 399          * @return Boolean
 400          */
 401         public static function isDeleted( $rc, $field ) {
 402                 return ( $rc->mAttribs['rc_deleted'] & $field ) == $field;
 403         }
 404
 405         /**
 406          * Determine if the current user is allowed to view a particular
 407          * field of this revision, if it's marked as deleted.
 408          * @param $rc RCCacheEntry
 409          * @param $field Integer
 410          * @return Boolean
 411          */
 412         public static function userCan( $rc, $field ) {
 413                 if( $rc->mAttribs['rc_type'] == RC_LOG ) {
 414                         return LogEventsList::userCanBitfield( $rc->mAttribs['rc_deleted'], $field );
 415                 } else {
 416                         return Revision::userCanBitfield( $rc->mAttribs['rc_deleted'], $field );
 417                 }
 418         }
 419
 420         protected function maybeWatchedLink( $link, $watched = false ) {
 421                 if( $watched ) {
 422                         return '<strong class="mw-watched">' . $link . '</strong>';
 423                 } else {
 424                         return '<span class="mw-rc-unwatched">' . $link . '</span>';
 425                 }
 426         }
 427
 428         /** Inserts a rollback link
 429          *
 430          * @param $s
 431          * @param $rc RecentChange
 432          */
 433         public function insertRollback( &$s, &$rc ) {
 434                 if( !$rc->mAttribs['rc_new'] && $rc->mAttribs['rc_this_oldid'] && $rc->mAttribs['rc_cur_id'] ) {
 435                         $page = $rc->getTitle();
 436                         /** Check for rollback and edit permissions, disallow special pages, and only
 437                           * show a link on the top-most revision */
 438                         if ( $this->getUser()->isAllowed('rollback') && $rc->mAttribs['page_latest'] == $rc->mAttribs['rc_this_oldid'] )
 439                         {
 440                                 $rev = new Revision( array(
 441                                         'id'        => $rc->mAttribs['rc_this_oldid'],
 442                                         'user'      => $rc->mAttribs['rc_user'],
 443                                         'user_text' => $rc->mAttribs['rc_user_text'],
 444                                         'deleted'   => $rc->mAttribs['rc_deleted']
 445                                 ) );
 446                                 $rev->setTitle( $page );
 447                                 $s .= ' '.Linker::generateRollback( $rev, $this->getContext() );
 448                         }
 449                 }
 450         }
 451
 452         /**
 453          * @param $s
 454          * @param $rc RecentChange
 455          * @param $classes
 456          * @return
 457          */
 458         public function insertTags( &$s, &$rc, &$classes ) {
 459                 if ( empty($rc->mAttribs['ts_tags']) )
 460                         return;
 461
 462                 list($tagSummary, $newClasses) = ChangeTags::formatSummaryRow( $rc->mAttribs['ts_tags'], 'changeslist' );
 463                 $classes = array_merge( $classes, $newClasses );
 464                 $s .= ' ' . $tagSummary;
 465         }
 466
 467         public function insertExtra( &$s, &$rc, &$classes ) {
 468                 ## Empty, used for subclassers to add anything special.
 469         }
 470 }
 471
 472
 473 /**
 474  * Generate a list of changes using the good old system (no javascript)
 475  */
 476 class OldChangesList extends ChangesList {
 477         /**
 478          * Format a line using the old system (aka without any javascript).
 479          *
 480          * @param $rc RecentChange
 481          */
 482         public function recentChangesLine( &$rc, $watched = false, $linenumber = null ) {
 483                 global $wgRCShowChangedSize;
 484                 wfProfileIn( __METHOD__ );
 485                 # Should patrol-related stuff be shown?
 486                 $unpatrolled = $this->getUser()->useRCPatrol() && !$rc->mAttribs['rc_patrolled'];
 487
 488                 $dateheader = ''; // $s now contains only <li>...</li>, for hooks' convenience.
 489                 $this->insertDateHeader( $dateheader, $rc->mAttribs['rc_timestamp'] );
 490
 491                 $s = '';
 492                 $classes = array();
 493                 // use mw-line-even/mw-line-odd class only if linenumber is given (feature from bug 14468)
 494                 if( $linenumber ) {
 495                         if( $linenumber & 1 ) {
 496                                 $classes[] = 'mw-line-odd';
 497                         }
 498                         else {
 499                                 $classes[] = 'mw-line-even';
 500                         }
 501                 }
 502
 503                 // Moved pages (very very old, not supported anymore)
 504                 if( $rc->mAttribs['rc_type'] == RC_MOVE || $rc->mAttribs['rc_type'] == RC_MOVE_OVER_REDIRECT ) {
 505                 // Log entries
 506                 } elseif( $rc->mAttribs['rc_log_type'] ) {
 507                         $logtitle = Title::newFromText( 'Log/'.$rc->mAttribs['rc_log_type'], NS_SPECIAL );
 508                         $this->insertLog( $s, $logtitle, $rc->mAttribs['rc_log_type'] );
 509                 // Log entries (old format) or log targets, and special pages
 510                 } elseif( $rc->mAttribs['rc_namespace'] == NS_SPECIAL ) {
 511                         list( $name, $subpage ) = SpecialPageFactory::resolveAlias( $rc->mAttribs['rc_title'] );
 512                         if( $name == 'Log' ) {
 513                                 $this->insertLog( $s, $rc->getTitle(), $subpage );
 514                         }
 515                 // Regular entries
 516                 } else {
 517                         $this->insertDiffHist( $s, $rc, $unpatrolled );
 518                         # M, N, b and ! (minor, new, bot and unpatrolled)
 519                         $s .= $this->recentChangesFlags(
 520                                 array(
 521                                         'newpage' => $rc->mAttribs['rc_new'],
 522                                         'minor' => $rc->mAttribs['rc_minor'],
 523                                         'unpatrolled' => $unpatrolled,
 524                                         'bot' => $rc->mAttribs['rc_bot']
 525                                 ),
 526                                 ''
 527                         );
 528                         $this->insertArticleLink( $s, $rc, $unpatrolled, $watched );
 529                 }
 530                 # Edit/log timestamp
 531                 $this->insertTimestamp( $s, $rc );
 532                 # Bytes added or removed
 533                 if( $wgRCShowChangedSize ) {
 534                         $cd = $rc->getCharacterDifference();
 535                         if( $cd != '' ) {
 536                                 $s .= "$cd  . . ";
 537                         }
 538                 }
 539
 540                 if ( $rc->mAttribs['rc_type'] == RC_LOG ) {
 541                         $s .= $this->insertLogEntry( $rc );
 542                 } else {
 543                         # User tool links
 544                         $this->insertUserRelatedLinks( $s, $rc );
 545                         # LTR/RTL direction mark
 546                         $s .= $this->getLang()->getDirMark();
 547                 }
 548
 549                 # Tags
 550                 $this->insertTags( $s, $rc, $classes );
 551                 # Rollback
 552                 $this->insertRollback( $s, $rc );
 553                 # For subclasses
 554                 $this->insertExtra( $s, $rc, $classes );
 555
 556                 # How many users watch this page
 557                 if( $rc->numberofWatchingusers > 0 ) {
 558                         $s .= ' ' . wfMsgExt( 'number_of_watching_users_RCview',
 559                                 array( 'parsemag', 'escape' ), $this->getLang()->formatNum( $rc->numberofWatchingusers ) );
 560                 }
 561
 562                 if( $this->watchlist ) {
 563                         $classes[] = Sanitizer::escapeClass( 'watchlist-'.$rc->mAttribs['rc_namespace'].'-'.$rc->mAttribs['rc_title'] );
 564                 }
 565
 566                 wfRunHooks( 'OldChangesListRecentChangesLine', array(&$this, &$s, $rc) );
 567
 568                 wfProfileOut( __METHOD__ );
 569                 return "$dateheader<li class=\"".implode( ' ', $classes )."\">".$s."</li>\n";
 570         }
 571 }
 572
 573
 574 /**
 575  * Generate a list of changes using an Enhanced system (uses javascript).
 576  */
 577 class EnhancedChangesList extends ChangesList {
 578         /**
 579          * Add the JavaScript file for enhanced changeslist
 580          * @return String
 581          */
 582         public function beginRecentChangesList() {
 583                 $this->rc_cache = array();
 584                 $this->rcMoveIndex = 0;
 585                 $this->rcCacheIndex = 0;
 586                 $this->lastdate = '';
 587                 $this->rclistOpen = false;
 588                 $this->getOutput()->addModuleStyles( 'mediawiki.special.changeslist' );
 589                 return '';
 590         }
 591         /**
 592          * Format a line for enhanced recentchange (aka with javascript and block of lines).
 593          *
 594          * @param $baseRC RecentChange
 595          * @param $watched bool
 596          *
 597          * @return string
 598          */
 599         public function recentChangesLine( &$baseRC, $watched = false ) {
 600                 wfProfileIn( __METHOD__ );
 601
 602                 # Create a specialised object
 603                 $rc = RCCacheEntry::newFromParent( $baseRC );
 604
 605                 $curIdEq = array( 'curid' => $rc->mAttribs['rc_cur_id'] );
 606
 607                 # If it's a new day, add the headline and flush the cache
 608                 $date = $this->getLang()->date( $rc->mAttribs['rc_timestamp'], true );
 609                 $ret = '';
 610                 if( $date != $this->lastdate ) {
 611                         # Process current cache
 612                         $ret = $this->recentChangesBlock();
 613                         $this->rc_cache = array();
 614                         $ret .= Xml::element( 'h4', null, $date ) . "\n";
 615                         $this->lastdate = $date;
 616                 }
 617
 618                 # Should patrol-related stuff be shown?
 619                 if( $this->getUser()->useRCPatrol() ) {
 620                         $rc->unpatrolled = !$rc->mAttribs['rc_patrolled'];
 621                 } else {
 622                         $rc->unpatrolled = false;
 623                 }
 624
 625                 $showdifflinks = true;
 626                 # Make article link
 627                 $type = $rc->mAttribs['rc_type'];
 628                 $logType = $rc->mAttribs['rc_log_type'];
 629                 // Page moves, very old style, not supported anymore
 630                 if( $type == RC_MOVE || $type == RC_MOVE_OVER_REDIRECT ) {
 631                 // New unpatrolled pages
 632                 } elseif( $rc->unpatrolled && $type == RC_NEW ) {
 633                         $clink = Linker::linkKnown( $rc->getTitle(), null, array(),
 634                                 array( 'rcid' => $rc->mAttribs['rc_id'] ) );
 635                 // Log entries
 636                 } elseif( $type == RC_LOG ) {
 637                         if( $logType ) {
 638                                 $logtitle = SpecialPage::getTitleFor( 'Log', $logType );
 639                                 $clink = '(' . Linker::linkKnown( $logtitle,
 640                                         LogPage::logName( $logType ) ) . ')';
 641                         } else {
 642                                 $clink = Linker::link( $rc->getTitle() );
 643                         }
 644                         $watched = false;
 645                 // Log entries (old format) and special pages
 646                 } elseif( $rc->mAttribs['rc_namespace'] == NS_SPECIAL ) {
 647                         list( $specialName, $logtype ) = SpecialPageFactory::resolveAlias( $rc->mAttribs['rc_title'] );
 648                         if ( $specialName == 'Log' ) {
 649                                 # Log updates, etc
 650                                 $logname = LogPage::logName( $logtype );
 651                                 $clink = '(' . Linker::linkKnown( $rc->getTitle(), $logname ) . ')';
 652                         } else {
 653                                 wfDebug( "Unexpected special page in recentchanges\n" );
 654                                 $clink = '';
 655                         }
 656                 // Edits
 657                 } else {
 658                         $clink = Linker::linkKnown( $rc->getTitle() );
 659                 }
 660
 661                 # Don't show unusable diff links
 662                 if ( !ChangesList::userCan($rc,Revision::DELETED_TEXT) ) {
 663                         $showdifflinks = false;
 664                 }
 665
 666                 $time = $this->getLang()->time( $rc->mAttribs['rc_timestamp'], true, true );
 667                 $rc->watched = $watched;
 668                 $rc->link = $clink;
 669                 $rc->timestamp = $time;
 670                 $rc->numberofWatchingusers = $baseRC->numberofWatchingusers;
 671
 672                 # Make "cur" and "diff" links.  Do not use link(), it is too slow if
 673                 # called too many times (50% of CPU time on RecentChanges!).
 674                 $thisOldid = $rc->mAttribs['rc_this_oldid'];
 675                 $lastOldid = $rc->mAttribs['rc_last_oldid'];
 676                 if( $rc->unpatrolled ) {
 677                         $rcIdQuery = array( 'rcid' => $rc->mAttribs['rc_id'] );
 678                 } else {
 679                         $rcIdQuery = array();
 680                 }
 681                 $querycur = $curIdEq + array( 'diff' => '0', 'oldid' => $thisOldid );
 682                 $querydiff = $curIdEq + array( 'diff' => $thisOldid, 'oldid' =>
 683                         $lastOldid ) + $rcIdQuery;
 684
 685                 if( !$showdifflinks ) {
 686                         $curLink = $this->message['cur'];
 687                         $diffLink = $this->message['diff'];
 688                 } elseif( in_array( $type, array( RC_NEW, RC_LOG, RC_MOVE, RC_MOVE_OVER_REDIRECT ) ) ) {
 689                         if ( $type != RC_NEW ) {
 690                                 $curLink = $this->message['cur'];
 691                         } else {
 692                                 $curUrl = htmlspecialchars( $rc->getTitle()->getLinkUrl( $querycur ) );
 693                                 $curLink = "<a href=\"$curUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['cur']}</a>";
 694                         }
 695                         $diffLink = $this->message['diff'];
 696                 } else {
 697                         $diffUrl = htmlspecialchars( $rc->getTitle()->getLinkUrl( $querydiff ) );
 698                         $curUrl = htmlspecialchars( $rc->getTitle()->getLinkUrl( $querycur ) );
 699                         $diffLink = "<a href=\"$diffUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['diff']}</a>";
 700                         $curLink = "<a href=\"$curUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['cur']}</a>";
 701                 }
 702
 703                 # Make "last" link
 704                 if( !$showdifflinks || !$lastOldid ) {
 705                         $lastLink = $this->message['last'];
 706                 } elseif( in_array( $type, array( RC_LOG, RC_MOVE, RC_MOVE_OVER_REDIRECT ) ) ) {
 707                         $lastLink = $this->message['last'];
 708                 } else {
 709                         $lastLink = Linker::linkKnown( $rc->getTitle(), $this->message['last'],
 710                                 array(), $curIdEq + array('diff' => $thisOldid, 'oldid' => $lastOldid) + $rcIdQuery );
 711                 }
 712
 713                 # Make user links
 714                 if( $this->isDeleted( $rc, Revision::DELETED_USER ) ) {
 715                         $rc->userlink = ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 716                 } else {
 717                         $rc->userlink = Linker::userLink( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 718                         $rc->usertalklink = Linker::userToolLinks( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 719                 }
 720
 721                 $rc->lastlink = $lastLink;
 722                 $rc->curlink  = $curLink;
 723                 $rc->difflink = $diffLink;
 724
 725                 # Put accumulated information into the cache, for later display
 726                 # Page moves go on their own line
 727                 $title = $rc->getTitle();
 728                 $secureName = $title->getPrefixedDBkey();
 729                 if( $type == RC_MOVE || $type == RC_MOVE_OVER_REDIRECT ) {
 730                         # Use an @ character to prevent collision with page names
 731                         $this->rc_cache['@@' . ($this->rcMoveIndex++)] = array($rc);
 732                 } else {
 733                         # Logs are grouped by type
 734                         if( $type == RC_LOG ){
 735                                 $secureName = SpecialPage::getTitleFor( 'Log', $logType )->getPrefixedDBkey();
 736                         }
 737                         if( !isset( $this->rc_cache[$secureName] ) ) {
 738                                 $this->rc_cache[$secureName] = array();
 739                         }
 740
 741                         array_push( $this->rc_cache[$secureName], $rc );
 742                 }
 743
 744                 wfRunHooks( 'EnhancedChangesListRecentChangesLine', array(&$this, &$s, $rc) );
 745
 746                 wfProfileOut( __METHOD__ );
 747
 748                 return $ret;
 749         }
 750
 751         /**
 752          * Enhanced RC group
 753          */
 754         protected function recentChangesBlockGroup( $block ) {
 755                 global $wgRCShowChangedSize;
 756
 757                 wfProfileIn( __METHOD__ );
 758
 759                 # Add the namespace and title of the block as part of the class
 760                 if ( $block[0]->mAttribs['rc_log_type'] ) {
 761                         # Log entry
 762                         $classes = 'mw-collapsible mw-collapsed mw-enhanced-rc ' . Sanitizer::escapeClass( 'mw-changeslist-log-' . $block[0]->mAttribs['rc_log_type'] . '-' . $block[0]->mAttribs['rc_title'] );
 763                 } else {
 764                         $classes = 'mw-collapsible mw-collapsed mw-enhanced-rc ' . Sanitizer::escapeClass( 'mw-changeslist-ns' . $block[0]->mAttribs['rc_namespace'] . '-' . $block[0]->mAttribs['rc_title'] );
 765                 }
 766                 $r = Html::openElement( 'table', array( 'class' => $classes ) ) .
 767                         Html::openElement( 'tr' );
 768
 769                 # Collate list of users
 770                 $userlinks = array();
 771                 # Other properties
 772                 $unpatrolled = false;
 773                 $isnew = false;
 774                 $curId = $currentRevision = 0;
 775                 # Some catalyst variables...
 776                 $namehidden = true;
 777                 $allLogs = true;
 778                 foreach( $block as $rcObj ) {
 779                         $oldid = $rcObj->mAttribs['rc_last_oldid'];
 780                         if( $rcObj->mAttribs['rc_new'] ) {
 781                                 $isnew = true;
 782                         }
 783                         // If all log actions to this page were hidden, then don't
 784                         // give the name of the affected page for this block!
 785                         if( !$this->isDeleted( $rcObj, LogPage::DELETED_ACTION ) ) {
 786                                 $namehidden = false;
 787                         }
 788                         $u = $rcObj->userlink;
 789                         if( !isset( $userlinks[$u] ) ) {
 790                                 $userlinks[$u] = 0;
 791                         }
 792                         if( $rcObj->unpatrolled ) {
 793                                 $unpatrolled = true;
 794                         }
 795                         if( $rcObj->mAttribs['rc_type'] != RC_LOG ) {
 796                                 $allLogs = false;
 797                         }
 798                         # Get the latest entry with a page_id and oldid
 799                         # since logs may not have these.
 800                         if( !$curId && $rcObj->mAttribs['rc_cur_id'] ) {
 801                                 $curId = $rcObj->mAttribs['rc_cur_id'];
 802                         }
 803                         if( !$currentRevision && $rcObj->mAttribs['rc_this_oldid'] ) {
 804                                 $currentRevision = $rcObj->mAttribs['rc_this_oldid'];
 805                         }
 806
 807                         $bot = $rcObj->mAttribs['rc_bot'];
 808                         $userlinks[$u]++;
 809                 }
 810
 811                 # Sort the list and convert to text
 812                 krsort( $userlinks );
 813                 asort( $userlinks );
 814                 $users = array();
 815                 foreach( $userlinks as $userlink => $count) {
 816                         $text = $userlink;
 817                         $text .= $this->getLang()->getDirMark();
 818                         if( $count > 1 ) {
 819                                 $text .= ' (' . $this->getLang()->formatNum( $count ) . '×)';
 820                         }
 821                         array_push( $users, $text );
 822                 }
 823
 824                 $users = ' <span class="changedby">[' .
 825                         implode( $this->message['semicolon-separator'], $users ) . ']</span>';
 826
 827                 # Title for <a> tags
 828                 $expandTitle = htmlspecialchars( wfMsg( 'rc-enhanced-expand' ) );
 829                 $closeTitle = htmlspecialchars( wfMsg( 'rc-enhanced-hide' ) );
 830
 831                 $tl = "<span class='mw-collapsible-toggle'>"
 832                         . "<span class='mw-rc-openarrow'>"
 833                         . "<a href='#' title='$expandTitle'>{$this->sideArrow()}</a>"
 834                         . "</span><span class='mw-rc-closearrow'>"
 835                         . "<a href='#' title='$closeTitle'>{$this->downArrow()}</a>"
 836                         . "</span></span>";
 837                 $r .= "<td>$tl</td>";
 838
 839                 # Main line
 840                 $r .= '<td class="mw-enhanced-rc">' . $this->recentChangesFlags( array(
 841                         'newpage' => $isnew,
 842                         'minor' => false,
 843                         'unpatrolled' => $unpatrolled,
 844                         'bot' => $bot ,
 845                 ) );
 846
 847                 # Timestamp
 848                 $r .= '&#160;'.$block[0]->timestamp.'&#160;</td><td>';
 849
 850                 # Article link
 851                 if( $namehidden ) {
 852                         $r .= ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-event' ) . '</span>';
 853                 } elseif( $allLogs ) {
 854                         $r .= $this->maybeWatchedLink( $block[0]->link, $block[0]->watched );
 855                 } else {
 856                         $this->insertArticleLink( $r, $block[0], $block[0]->unpatrolled, $block[0]->watched );
 857                 }
 858
 859                 $r .= $this->getLang()->getDirMark();
 860
 861                 $queryParams['curid'] = $curId;
 862                 # Changes message
 863                 $n = count($block);
 864                 static $nchanges = array();
 865                 if ( !isset( $nchanges[$n] ) ) {
 866                         $nchanges[$n] = wfMsgExt( 'nchanges', array( 'parsemag', 'escape' ), $this->getLang()->formatNum( $n ) );
 867                 }
 868                 # Total change link
 869                 $r .= ' ';
 870                 if( !$allLogs ) {
 871                         $r .= '(';
 872                         if( !ChangesList::userCan( $rcObj, Revision::DELETED_TEXT ) ) {
 873                                 $r .= $nchanges[$n];
 874                         } elseif( $isnew ) {
 875                                 $r .= $nchanges[$n];
 876                         } else {
 877                                 $params = $queryParams;
 878                                 $params['diff'] = $currentRevision;
 879                                 $params['oldid'] = $oldid;
 880
 881                                 $r .= Linker::link(
 882                                         $block[0]->getTitle(),
 883                                         $nchanges[$n],
 884                                         array(),
 885                                         $params,
 886                                         array( 'known', 'noclasses' )
 887                                 );
 888                         }
 889                 }
 890
 891                 # History
 892                 if( $allLogs ) {
 893                         // don't show history link for logs
 894                 } elseif( $namehidden || !$block[0]->getTitle()->exists() ) {
 895                         $r .= $this->message['pipe-separator'] . $this->message['hist'] . ')';
 896                 } else {
 897                         $params = $queryParams;
 898                         $params['action'] = 'history';
 899
 900                         $r .= $this->message['pipe-separator'] .
 901                                 Linker::linkKnown(
 902                                         $block[0]->getTitle(),
 903                                         $this->message['hist'],
 904                                         array(),
 905                                         $params
 906                                 ) . ')';
 907                 }
 908                 $r .= ' . . ';
 909
 910                 # Character difference (does not apply if only log items)
 911                 if( $wgRCShowChangedSize && !$allLogs ) {
 912                         $last = 0;
 913                         $first = count($block) - 1;
 914                         # Some events (like logs) have an "empty" size, so we need to skip those...
 915                         while( $last < $first && $block[$last]->mAttribs['rc_new_len'] === null ) {
 916                                 $last++;
 917                         }
 918                         while( $first > $last && $block[$first]->mAttribs['rc_old_len'] === null ) {
 919                                 $first--;
 920                         }
 921                         # Get net change
 922                         $chardiff = $rcObj->getCharacterDifference( $block[$first]->mAttribs['rc_old_len'],
 923                                 $block[$last]->mAttribs['rc_new_len'] );
 924
 925                         if( $chardiff == '' ) {
 926                                 $r .= ' ';
 927                         } else {
 928                                 $r .= ' ' . $chardiff. ' . . ';
 929                         }
 930                 }
 931
 932                 $r .= $users;
 933                 $r .= $this->numberofWatchingusers($block[0]->numberofWatchingusers);
 934
 935                 # Sub-entries
 936                 foreach( $block as $rcObj ) {
 937                         # Classes to apply -- TODO implement
 938                         $classes = array();
 939                         $type = $rcObj->mAttribs['rc_type'];
 940
 941                         #$r .= '<tr><td valign="top">'.$this->spacerArrow();
 942                         $r .= '<tr><td></td><td class="mw-enhanced-rc">';
 943                         $r .= $this->recentChangesFlags( array(
 944                                 'newpage' => $rcObj->mAttribs['rc_new'],
 945                                 'minor' => $rcObj->mAttribs['rc_minor'],
 946                                 'unpatrolled' => $rcObj->unpatrolled,
 947                                 'bot' => $rcObj->mAttribs['rc_bot'],
 948                         ) );
 949                         $r .= '&#160;</td><td class="mw-enhanced-rc-nested"><span class="mw-enhanced-rc-time">';
 950
 951                         $params = $queryParams;
 952
 953                         if( $rcObj->mAttribs['rc_this_oldid'] != 0 ) {
 954                                 $params['oldid'] = $rcObj->mAttribs['rc_this_oldid'];
 955                         }
 956
 957                         # Log timestamp
 958                         if( $type == RC_LOG ) {
 959                                 $link = $rcObj->timestamp;
 960                         # Revision link
 961                         } elseif( !ChangesList::userCan($rcObj,Revision::DELETED_TEXT) ) {
 962                                 $link = '<span class="history-deleted">'.$rcObj->timestamp.'</span> ';
 963                         } else {
 964                                 if ( $rcObj->unpatrolled && $type == RC_NEW) {
 965                                         $params['rcid'] = $rcObj->mAttribs['rc_id'];
 966                                 }
 967
 968                                 $link = Linker::linkKnown(
 969                                                 $rcObj->getTitle(),
 970                                                 $rcObj->timestamp,
 971                                                 array(),
 972                                                 $params
 973                                         );
 974                                 if( $this->isDeleted($rcObj,Revision::DELETED_TEXT) )
 975                                         $link = '<span class="history-deleted">'.$link.'</span> ';
 976                         }
 977                         $r .= $link . '</span>';
 978
 979                         if ( !$type == RC_LOG || $type == RC_NEW ) {
 980                                 $r .= ' (';
 981                                 $r .= $rcObj->curlink;
 982                                 $r .= $this->message['pipe-separator'];
 983                                 $r .= $rcObj->lastlink;
 984                                 $r .= ')';
 985                         }
 986                         $r .= ' . . ';
 987
 988                         # Character diff
 989                         if( $wgRCShowChangedSize && $rcObj->getCharacterDifference() ) {
 990                                 $r .= $rcObj->getCharacterDifference() . ' . . ' ;
 991                         }
 992
 993                         if ( $rcObj->mAttribs['rc_type'] == RC_LOG ) {
 994                                 $r .= $this->insertLogEntry( $rcObj );
 995                         } else {
 996                                 # User links
 997                                 $r .= $rcObj->userlink;
 998                                 $r .= $rcObj->usertalklink;
 999                         }
1000
1001                         # Rollback
1002                         $this->insertRollback( $r, $rcObj );
1003                         # Tags
1004                         $this->insertTags( $r, $rcObj, $classes );
1005
1006                         $r .= "</td></tr>\n";
1007                 }
1008                 $r .= "</table>\n";
1009
1010                 $this->rcCacheIndex++;
1011
1012                 wfProfileOut( __METHOD__ );
1013
1014                 return $r;
1015         }
1016
1017         /**
1018          * Generate HTML for an arrow or placeholder graphic
1019          * @param $dir String: one of '', 'd', 'l', 'r'
1020          * @param $alt String: text
1021          * @param $title String: text
1022          * @return String: HTML <img> tag
1023          */
1024         protected function arrow( $dir, $alt='', $title='' ) {
1025                 global $wgStylePath;
1026                 $encUrl = htmlspecialchars( $wgStylePath . '/common/images/Arr_' . $dir . '.png' );
1027                 $encAlt = htmlspecialchars( $alt );
1028                 $encTitle = htmlspecialchars( $title );
1029                 return "<img src=\"$encUrl\" width=\"12\" height=\"12\" alt=\"$encAlt\" title=\"$encTitle\" />";
1030         }
1031
1032         /**
1033          * Generate HTML for a right- or left-facing arrow,
1034          * depending on language direction.
1035          * @return String: HTML <img> tag
1036          */
1037         protected function sideArrow() {
1038                 global $wgContLang;
1039                 $dir = $wgContLang->isRTL() ? 'l' : 'r';
1040                 return $this->arrow( $dir, '+', wfMsg( 'rc-enhanced-expand' ) );
1041         }
1042
1043         /**
1044          * Generate HTML for a down-facing arrow
1045          * depending on language direction.
1046          * @return String: HTML <img> tag
1047          */
1048         protected function downArrow() {
1049                 return $this->arrow( 'd', '-', wfMsg( 'rc-enhanced-hide' ) );
1050         }
1051
1052         /**
1053          * Generate HTML for a spacer image
1054          * @return String: HTML <img> tag
1055          */
1056         protected function spacerArrow() {
1057                 return $this->arrow( '', codepointToUtf8( 0xa0 ) ); // non-breaking space
1058         }
1059
1060         /**
1061          * Enhanced RC ungrouped line.
1062          *
1063          * @param $rcObj RecentChange
1064          * @return String: a HTML formated line (generated using $r)
1065          */
1066         protected function recentChangesBlockLine( $rcObj ) {
1067                 global $wgRCShowChangedSize;
1068
1069                 wfProfileIn( __METHOD__ );
1070                 $query['curid'] = $rcObj->mAttribs['rc_cur_id'];
1071
1072                 $type = $rcObj->mAttribs['rc_type'];
1073                 $logType = $rcObj->mAttribs['rc_log_type'];
1074                 if( $logType ) {
1075                         # Log entry
1076                         $classes = 'mw-enhanced-rc ' . Sanitizer::escapeClass( 'mw-changeslist-log-' . $logType . '-' . $rcObj->mAttribs['rc_title'] );
1077                 } else {
1078                         $classes = 'mw-enhanced-rc ' . Sanitizer::escapeClass( 'mw-changeslist-ns' . $rcObj->mAttribs['rc_namespace'] . '-' . $rcObj->mAttribs['rc_title'] );
1079                 }
1080                 $r = Html::openElement( 'table', array( 'class' => $classes ) ) .
1081                         Html::openElement( 'tr' );
1082
1083                 $r .= '<td class="mw-enhanced-rc">' . $this->spacerArrow();
1084                 # Flag and Timestamp
1085                 if( $type == RC_MOVE || $type == RC_MOVE_OVER_REDIRECT ) {
1086                         $r .= '&#160;&#160;&#160;&#160;'; // 4 flags -> 4 spaces
1087                 } else {
1088                         $r .= $this->recentChangesFlags( array(
1089                                 'newpage' => $type == RC_NEW,
1090                                 'mino' => $rcObj->mAttribs['rc_minor'],
1091                                 'unpatrolled' => $rcObj->unpatrolled,
1092                                 'bot' => $rcObj->mAttribs['rc_bot'],
1093                         ) );
1094                 }
1095                 $r .= '&#160;'.$rcObj->timestamp.'&#160;</td><td>';
1096                 # Article or log link
1097                 if( $logType ) {
1098                         $logtitle = SpecialPage::getTitleFor( 'Log', $logType );
1099                         $logname = LogPage::logName( $logType );
1100                         $r .= '(' . Linker::linkKnown( $logtitle, htmlspecialchars( $logname ) ) . ')';
1101                 } else {
1102                         $this->insertArticleLink( $r, $rcObj, $rcObj->unpatrolled, $rcObj->watched );
1103                 }
1104                 # Diff and hist links
1105                 if ( $type != RC_LOG ) {
1106                         $r .= ' ('. $rcObj->difflink . $this->message['pipe-separator'];
1107                         $query['action'] = 'history';
1108                         $r .= Linker::linkKnown(
1109                                 $rcObj->getTitle(),
1110                                 $this->message['hist'],
1111                                 array(),
1112                                 $query
1113                         ) . ')';
1114                 }
1115                 $r .= ' . . ';
1116                 # Character diff
1117                 if( $wgRCShowChangedSize && ($cd = $rcObj->getCharacterDifference()) ) {
1118                         $r .= "$cd . . ";
1119                 }
1120
1121                 if ( $type == RC_LOG ) {
1122                         $r .= $this->insertLogEntry( $rcObj );
1123                 } else {
1124                         $r .= ' '.$rcObj->userlink . $rcObj->usertalklink;
1125                 }
1126
1127                 # Tags
1128                 $classes = explode( ' ', $classes );
1129                 $this->insertTags( $r, $rcObj, $classes );
1130                 # Show how many people are watching this if enabled
1131                 $r .= $this->numberofWatchingusers($rcObj->numberofWatchingusers);
1132
1133                 $r .= "</td></tr></table>\n";
1134
1135                 wfProfileOut( __METHOD__ );
1136
1137                 return $r;
1138         }
1139
1140         /**
1141          * If enhanced RC is in use, this function takes the previously cached
1142          * RC lines, arranges them, and outputs the HTML
1143          *
1144          * @return string
1145          */
1146         protected function recentChangesBlock() {
1147                 if( count ( $this->rc_cache ) == 0 ) {
1148                         return '';
1149                 }
1150
1151                 wfProfileIn( __METHOD__ );
1152
1153                 $blockOut = '';
1154                 foreach( $this->rc_cache as $block ) {
1155                         if( count( $block ) < 2 ) {
1156                                 $blockOut .= $this->recentChangesBlockLine( array_shift( $block ) );
1157                         } else {
1158                                 $blockOut .= $this->recentChangesBlockGroup( $block );
1159                         }
1160                 }
1161
1162                 wfProfileOut( __METHOD__ );
1163
1164                 return '<div>'.$blockOut.'</div>';
1165         }
1166
1167         /**
1168          * Returns text for the end of RC
1169          * If enhanced RC is in use, returns pretty much all the text
1170          */
1171         public function endRecentChangesList() {
1172                 return $this->recentChangesBlock() . parent::endRecentChangesList();
1173         }
1174
1175 }