includes/ChangesList.php

   1 <?php
   2
   3 /**
   4  * @todo document
   5  */
   6 class RCCacheEntry extends RecentChange {
   7         var $secureName, $link;
   8         var $curlink , $difflink, $lastlink, $usertalklink, $versionlink;
   9         var $userlink, $timestamp, $watched;
  10
  11         static function newFromParent( $rc ) {
  12                 $rc2 = new RCCacheEntry;
  13                 $rc2->mAttribs = $rc->mAttribs;
  14                 $rc2->mExtra = $rc->mExtra;
  15                 return $rc2;
  16         }
  17 }
  18
  19 /**
  20  * Class to show various lists of changes:
  21  * - what links here
  22  * - related changes
  23  * - recent changes
  24  */
  25 class ChangesList {
  26         # Called by history lists and recent changes
  27         public $skin;
  28         protected $watchlist = false;
  29
  30         /**
  31         * Changeslist contructor
  32         * @param Skin $skin
  33         */
  34         public function __construct( &$skin ) {
  35                 $this->skin =& $skin;
  36                 $this->preCacheMessages();
  37         }
  38
  39         /**
  40          * Fetch an appropriate changes list class for the specified user
  41          * Some users might want to use an enhanced list format, for instance
  42          *
  43          * @param $user User to fetch the list class for
  44          * @return ChangesList derivative
  45          */
  46         public static function newFromUser( &$user ) {
  47                 $sk = $user->getSkin();
  48                 $list = NULL;
  49                 if( wfRunHooks( 'FetchChangesList', array( &$user, &$sk, &$list ) ) ) {
  50                         return $user->getOption( 'usenewrc' ) ?
  51                                 new EnhancedChangesList( $sk ) : new OldChangesList( $sk );
  52                 } else {
  53                         return $list;
  54                 }
  55         }
  56
  57         /**
  58          * Sets the list to use a <li class="watchlist-(namespace)-(page)"> tag
  59          * @param bool $value
  60          */
  61         public function setWatchlistDivs( $value = true ) {
  62                 $this->watchlist = $value;
  63         }
  64
  65         /**
  66          * As we use the same small set of messages in various methods and that
  67          * they are called often, we call them once and save them in $this->message
  68          */
  69         private function preCacheMessages() {
  70                 if( !isset( $this->message ) ) {
  71                         foreach( explode(' ', 'cur diff hist minoreditletter newpageletter last '.
  72                                 'blocklink history boteditletter semicolon-separator pipe-separator' ) as $msg ) {
  73                                 $this->message[$msg] = wfMsgExt( $msg, array( 'escapenoentities' ) );
  74                         }
  75                 }
  76         }
  77
  78
  79         /**
  80          * Returns the appropriate flags for new page, minor change and patrolling
  81          * @param bool $new
  82          * @param bool $minor
  83          * @param bool $patrolled
  84          * @param string $nothing, string to use for empty space
  85          * @param bool $bot
  86          * @return string
  87          */
  88         protected function recentChangesFlags( $new, $minor, $patrolled, $nothing = '&nbsp;', $bot = false ) {
  89                 $f = $new ?
  90                         '<abbr class="newpage">' . $this->message['newpageletter'] . '</abbr>' : $nothing;
  91                 $f .= $minor ?
  92                         '<abbr class="minor">' . $this->message['minoreditletter'] . '</abbr>' : $nothing;
  93                 $f .= $bot ? '<abbr class="bot">' . $this->message['boteditletter'] . '</abbr>' : $nothing;
  94                 $f .= $patrolled ? '<span class="unpatrolled">!</span>' : $nothing;
  95                 return $f;
  96         }
  97
  98         /**
  99          * Returns text for the start of the tabular part of RC
 100          * @return string
 101          */
 102         public function beginRecentChangesList() {
 103                 $this->rc_cache = array();
 104                 $this->rcMoveIndex = 0;
 105                 $this->rcCacheIndex = 0;
 106                 $this->lastdate = '';
 107                 $this->rclistOpen = false;
 108                 return '';
 109         }
 110
 111         /**
 112          * Show formatted char difference
 113          * @param int $old bytes
 114          * @param int $new bytes
 115          * @returns string
 116          */
 117         public static function showCharacterDifference( $old, $new ) {
 118                 global $wgRCChangedSizeThreshold, $wgLang, $wgMiserMode;
 119                 $szdiff = $new - $old;
 120
 121                 $code = $wgLang->getCode();
 122                 static $fastCharDiff = array();
 123                 if ( !isset($fastCharDiff[$code]) ) {
 124                         $fastCharDiff[$code] = $wgMiserMode || wfMsgNoTrans( 'rc-change-size' ) === '$1';
 125                 }
 126
 127                 $formatedSize = $wgLang->formatNum($szdiff);
 128
 129                 if ( !$fastCharDiff[$code] ) {
 130                         $formatedSize = wfMsgExt( 'rc-change-size', array( 'parsemag', 'escape' ), $formatedSize );
 131                 }
 132
 133                 if( abs( $szdiff ) > abs( $wgRCChangedSizeThreshold ) ) {
 134                         $tag = 'strong';
 135                 } else {
 136                     $tag = 'span';
 137                 }
 138                 if( $szdiff === 0 ) {
 139                         return "<$tag class='mw-plusminus-null'>($formatedSize)</$tag>";
 140                 } elseif( $szdiff > 0 ) {
 141                         return "<$tag class='mw-plusminus-pos'>(+$formatedSize)</$tag>";
 142             } else {
 143                         return "<$tag class='mw-plusminus-neg'>($formatedSize)</$tag>";
 144                 }
 145         }
 146
 147         /**
 148          * Returns text for the end of RC
 149          * @return string
 150          */
 151         public function endRecentChangesList() {
 152                 if( $this->rclistOpen ) {
 153                         return "</ul>\n";
 154                 } else {
 155                         return '';
 156                 }
 157         }
 158
 159         protected function insertMove( &$s, $rc ) {
 160                 # Diff
 161                 $s .= '(' . $this->message['diff'] . ') (';
 162                 # Hist
 163                 $s .= $this->skin->link(
 164                         $rc->getMovedToTitle(),
 165                         $this->message['hist'],
 166                         array(),
 167                         array( 'action' => 'history' ),
 168                         array( 'known', 'noclasses' )
 169                 ) . ') . . ';
 170                 # "[[x]] moved to [[y]]"
 171                 $msg = ( $rc->mAttribs['rc_type'] == RC_MOVE ) ? '1movedto2' : '1movedto2_redir';
 172                 $s .= wfMsg(
 173                         $msg,
 174                         $this->skin->link(
 175                                 $rc->getTitle(),
 176                                 null,
 177                                 array(),
 178                                 array( 'redirect' => 'no' ),
 179                                 array( 'known', 'noclasses' )
 180                         ),
 181                         $this->skin->link(
 182                                 $rc->getMovedToTitle(),
 183                                 null,
 184                                 array(),
 185                                 array(),
 186                                 array( 'known', 'noclasses' )
 187                         )
 188                 );
 189         }
 190
 191         protected function insertDateHeader( &$s, $rc_timestamp ) {
 192                 global $wgLang;
 193                 # Make date header if necessary
 194                 $date = $wgLang->date( $rc_timestamp, true, true );
 195                 if( $date != $this->lastdate ) {
 196                         if( '' != $this->lastdate ) {
 197                                 $s .= "</ul>\n";
 198                         }
 199                         $s .= Xml::element( 'h4', null, $date ) . "\n<ul class=\"special\">";
 200                         $this->lastdate = $date;
 201                         $this->rclistOpen = true;
 202                 }
 203         }
 204
 205         protected function insertLog( &$s, $title, $logtype ) {
 206                 $logname = LogPage::logName( $logtype );
 207                 $s .= '(' . $this->skin->link(
 208                         $title,
 209                         $logname,
 210                         array(),
 211                         array(),
 212                         array( 'known', 'noclasses' )
 213                 ) . ')';
 214         }
 215
 216         protected function insertDiffHist( &$s, &$rc, $unpatrolled ) {
 217                 # Diff link
 218                 if( $rc->mAttribs['rc_type'] == RC_NEW || $rc->mAttribs['rc_type'] == RC_LOG ) {
 219                         $diffLink = $this->message['diff'];
 220                 } else if( !$this->userCan($rc,Revision::DELETED_TEXT) ) {
 221                         $diffLink = $this->message['diff'];
 222                 } else {
 223                         $query = array(
 224                                 'curid' => $rc->mAttribs['rc_cur_id'],
 225                                 'diff'  => $rc->mAttribs['rc_this_oldid'],
 226                                 'oldid' => $rc->mAttribs['rc_last_oldid']
 227                         );
 228
 229                         if( $unpatrolled ) {
 230                                 $query['rcid'] = $rc->mAttribs['rc_id'];
 231                         };
 232
 233                         $diffLink = $this->skin->link(
 234                                 $rc->getTitle(),
 235                                 $this->message['diff'],
 236                                 array( 'tabindex' => $rc->counter ),
 237                                 $query,
 238                                 array( 'known', 'noclasses' )
 239                         );
 240                 }
 241                 $s .= '('.$diffLink.') (';
 242                 # History link
 243                 $s .= $this->skin->link(
 244                         $rc->getTitle(),
 245                         $this->message['hist'],
 246                         array(),
 247                         array(
 248                                 'curid' => $rc->mAttribs['rc_cur_id'],
 249                                 'action' => 'history'
 250                         ),
 251                         array( 'known', 'noclasses' )
 252                 );
 253                 $s .= ') . . ';
 254         }
 255
 256         protected function insertArticleLink( &$s, &$rc, $unpatrolled, $watched ) {
 257                 global $wgContLang;
 258                 # If it's a new article, there is no diff link, but if it hasn't been
 259                 # patrolled yet, we need to give users a way to do so
 260                 $params = array();
 261
 262                 if ( $unpatrolled && $rc->mAttribs['rc_type'] == RC_NEW ) {
 263                         $params['rcid'] = $rc->mAttribs['rc_id'];
 264                 }
 265
 266                 if( $this->isDeleted($rc,Revision::DELETED_TEXT) ) {
 267                         $articlelink = $this->skin->link(
 268                                 $rc->getTitle(),
 269                                 null,
 270                                 array(),
 271                                 $params,
 272                                 array( 'known', 'noclasses' )
 273                         );
 274                         $articlelink = '<span class="history-deleted">' . $articlelink . '</span>';
 275                 } else {
 276                         $articlelink = ' '. $this->skin->link(
 277                                 $rc->getTitle(),
 278                                 null,
 279                                 array(),
 280                                 $params,
 281                                 array( 'known', 'noclasses' )
 282                         );
 283                 }
 284                 # Bolden pages watched by this user
 285                 if( $watched ) {
 286                         $articlelink = "<strong class=\"mw-watched\">{$articlelink}</strong>";
 287                 }
 288                 # RTL/LTR marker
 289                 $articlelink .= $wgContLang->getDirMark();
 290
 291                 wfRunHooks( 'ChangesListInsertArticleLink',
 292                         array(&$this, &$articlelink, &$s, &$rc, $unpatrolled, $watched) );
 293
 294                 $s .= " $articlelink";
 295         }
 296
 297         protected function insertTimestamp( &$s, $rc ) {
 298                 global $wgLang;
 299                 $s .= $this->message['semicolon-separator'] .
 300                         $wgLang->time( $rc->mAttribs['rc_timestamp'], true, true ) . ' . . ';
 301         }
 302
 303         /** Insert links to user page, user talk page and eventually a blocking link */
 304         public function insertUserRelatedLinks( &$s, &$rc ) {
 305                 if( $this->isDeleted( $rc, Revision::DELETED_USER ) ) {
 306                    $s .= ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 307                 } else {
 308                   $s .= $this->skin->userLink( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 309                   $s .= $this->skin->userToolLinks( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 310                 }
 311         }
 312
 313         /** insert a formatted action */
 314         protected function insertAction( &$s, &$rc ) {
 315                 if( $rc->mAttribs['rc_type'] == RC_LOG ) {
 316                         if( $this->isDeleted( $rc, LogPage::DELETED_ACTION ) ) {
 317                                 $s .= ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-event' ) . '</span>';
 318                         } else {
 319                                 $s .= ' '.LogPage::actionText( $rc->mAttribs['rc_log_type'], $rc->mAttribs['rc_log_action'],
 320                                         $rc->getTitle(), $this->skin, LogPage::extractParams( $rc->mAttribs['rc_params'] ), true, true );
 321                         }
 322                 }
 323         }
 324
 325         /** insert a formatted comment */
 326         protected function insertComment( &$s, &$rc ) {
 327                 if( $rc->mAttribs['rc_type'] != RC_MOVE && $rc->mAttribs['rc_type'] != RC_MOVE_OVER_REDIRECT ) {
 328                         if( $this->isDeleted( $rc, Revision::DELETED_COMMENT ) ) {
 329                                 $s .= ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-comment' ) . '</span>';
 330                         } else {
 331                                 $s .= $this->skin->commentBlock( $rc->mAttribs['rc_comment'], $rc->getTitle() );
 332                         }
 333                 }
 334         }
 335
 336         /**
 337          * Check whether to enable recent changes patrol features
 338          * @return bool
 339          */
 340         public static function usePatrol() {
 341                 global $wgUser;
 342                 return $wgUser->useRCPatrol();
 343         }
 344
 345         /**
 346          * Returns the string which indicates the number of watching users
 347          */
 348         protected function numberofWatchingusers( $count ) {
 349                 global $wgLang;
 350                 static $cache = array();
 351                 if( $count > 0 ) {
 352                         if( !isset( $cache[$count] ) ) {
 353                                 $cache[$count] = wfMsgExt( 'number_of_watching_users_RCview',
 354                                         array('parsemag', 'escape' ), $wgLang->formatNum( $count ) );
 355                         }
 356                         return $cache[$count];
 357                 } else {
 358                         return '';
 359                 }
 360         }
 361
 362         /**
 363          * Determine if said field of a revision is hidden
 364          * @param RCCacheEntry $rc
 365          * @param int $field one of DELETED_* bitfield constants
 366          * @return bool
 367          */
 368         public static function isDeleted( $rc, $field ) {
 369                 return ( $rc->mAttribs['rc_deleted'] & $field ) == $field;
 370         }
 371
 372         /**
 373          * Determine if the current user is allowed to view a particular
 374          * field of this revision, if it's marked as deleted.
 375          * @param RCCacheEntry $rc
 376          * @param int $field
 377          * @return bool
 378          */
 379         public static function userCan( $rc, $field ) {
 380                 if( ( $rc->mAttribs['rc_deleted'] & $field ) == $field ) {
 381                         global $wgUser;
 382                         $permission = ( $rc->mAttribs['rc_deleted'] & Revision::DELETED_RESTRICTED ) == Revision::DELETED_RESTRICTED
 383                                 ? 'suppressrevision'
 384                                 : 'deleterevision';
 385                         wfDebug( "Checking for $permission due to $field match on {$rc->mAttribs['rc_deleted']}\n" );
 386                         return $wgUser->isAllowed( $permission );
 387                 } else {
 388                         return true;
 389                 }
 390         }
 391
 392         protected function maybeWatchedLink( $link, $watched = false ) {
 393                 if( $watched ) {
 394                         return '<strong class="mw-watched">' . $link . '</strong>';
 395                 } else {
 396                         return '<span class="mw-rc-unwatched">' . $link . '</span>';
 397                 }
 398         }
 399
 400         /** Inserts a rollback link */
 401         public function insertRollback( &$s, &$rc ) {
 402                 global $wgUser;
 403                 if( !$rc->mAttribs['rc_new'] && $rc->mAttribs['rc_this_oldid'] && $rc->mAttribs['rc_cur_id'] ) {
 404                         $page = $rc->getTitle();
 405                         /** Check for rollback and edit permissions, disallow special pages, and only
 406                           * show a link on the top-most revision */
 407                         if ($wgUser->isAllowed('rollback') && $rc->mAttribs['page_latest'] == $rc->mAttribs['rc_this_oldid'] )
 408                         {
 409                                 $rev = new Revision( array(
 410                                         'id'        => $rc->mAttribs['rc_this_oldid'],
 411                                         'user'      => $rc->mAttribs['rc_user'],
 412                                         'user_text' => $rc->mAttribs['rc_user_text'],
 413                                         'deleted'   => $rc->mAttribs['rc_deleted']
 414                                 ) );
 415                                 $rev->setTitle( $page );
 416                                 $s .= ' '.$this->skin->generateRollback( $rev );
 417                         }
 418                 }
 419         }
 420
 421         public function insertTags( &$s, &$rc, &$classes ) {
 422                 if ( empty($rc->mAttribs['ts_tags']) )
 423                         return;
 424
 425                 list($tagSummary, $newClasses) = ChangeTags::formatSummaryRow( $rc->mAttribs['ts_tags'], 'changeslist' );
 426                 $classes = array_merge( $classes, $newClasses );
 427                 $s .= ' ' . $tagSummary;
 428         }
 429
 430         public function insertExtra( &$s, &$rc, &$classes ) {
 431                 ## Empty, used for subclassers to add anything special.
 432         }
 433 }
 434
 435
 436 /**
 437  * Generate a list of changes using the good old system (no javascript)
 438  */
 439 class OldChangesList extends ChangesList {
 440         /**
 441          * Format a line using the old system (aka without any javascript).
 442          */
 443         public function recentChangesLine( &$rc, $watched = false, $linenumber = NULL ) {
 444                 global $wgLang, $wgRCShowChangedSize, $wgUser;
 445                 wfProfileIn( __METHOD__ );
 446                 # Should patrol-related stuff be shown?
 447                 $unpatrolled = $wgUser->useRCPatrol() && !$rc->mAttribs['rc_patrolled'];
 448
 449                 $dateheader = ''; // $s now contains only <li>...</li>, for hooks' convenience.
 450                 $this->insertDateHeader( $dateheader, $rc->mAttribs['rc_timestamp'] );
 451
 452                 $s = '';
 453                 $classes = array();
 454                 // use mw-line-even/mw-line-odd class only if linenumber is given (feature from bug 14468)
 455                 if( $linenumber ) {
 456                         if( $linenumber & 1 ) {
 457                                 $classes[] = 'mw-line-odd';
 458                         }
 459                         else {
 460                                 $classes[] = 'mw-line-even';
 461                         }
 462                 }
 463
 464                 // Moved pages
 465                 if( $rc->mAttribs['rc_type'] == RC_MOVE || $rc->mAttribs['rc_type'] == RC_MOVE_OVER_REDIRECT ) {
 466                         $this->insertMove( $s, $rc );
 467                 // Log entries
 468                 } elseif( $rc->mAttribs['rc_log_type'] ) {
 469                         $logtitle = Title::newFromText( 'Log/'.$rc->mAttribs['rc_log_type'], NS_SPECIAL );
 470                         $this->insertLog( $s, $logtitle, $rc->mAttribs['rc_log_type'] );
 471                 // Log entries (old format) or log targets, and special pages
 472                 } elseif( $rc->mAttribs['rc_namespace'] == NS_SPECIAL ) {
 473                         list( $name, $subpage ) = SpecialPage::resolveAliasWithSubpage( $rc->mAttribs['rc_title'] );
 474                         if( $name == 'Log' ) {
 475                                 $this->insertLog( $s, $rc->getTitle(), $subpage );
 476                         }
 477                 // Regular entries
 478                 } else {
 479                         $this->insertDiffHist( $s, $rc, $unpatrolled );
 480                         # M, N, b and ! (minor, new, bot and unpatrolled)
 481                         $s .= $this->recentChangesFlags( $rc->mAttribs['rc_new'], $rc->mAttribs['rc_minor'],
 482                                 $unpatrolled, '', $rc->mAttribs['rc_bot'] );
 483                         $this->insertArticleLink( $s, $rc, $unpatrolled, $watched );
 484                 }
 485                 # Edit/log timestamp
 486                 $this->insertTimestamp( $s, $rc );
 487                 # Bytes added or removed
 488                 if( $wgRCShowChangedSize ) {
 489                         $cd = $rc->getCharacterDifference();
 490                         if( $cd != '' ) {
 491                                 $s .= "$cd  . . ";
 492                         }
 493                 }
 494                 # User tool links
 495                 $this->insertUserRelatedLinks( $s, $rc );
 496                 # Log action text (if any)
 497                 $this->insertAction( $s, $rc );
 498                 # Edit or log comment
 499                 $this->insertComment( $s, $rc );
 500                 # Tags
 501                 $this->insertTags( $s, $rc, $classes );
 502                 # Rollback
 503                 $this->insertRollback( $s, $rc );
 504                 # For subclasses
 505                 $this->insertExtra( $s, $rc, $classes );
 506
 507                 # How many users watch this page
 508                 if( $rc->numberofWatchingusers > 0 ) {
 509                         $s .= ' ' . wfMsgExt( 'number_of_watching_users_RCview',
 510                                 array( 'parsemag', 'escape' ), $wgLang->formatNum( $rc->numberofWatchingusers ) );
 511                 }
 512
 513                 if( $this->watchlist ) {
 514                         $classes[] = Sanitizer::escapeClass( 'watchlist-'.$rc->mAttribs['rc_namespace'].'-'.$rc->mAttribs['rc_title'] );
 515                 }
 516
 517                 wfRunHooks( 'OldChangesListRecentChangesLine', array(&$this, &$s, $rc) );
 518
 519                 wfProfileOut( __METHOD__ );
 520                 return "$dateheader<li class=\"".implode( ' ', $classes )."\">".$s."</li>\n";
 521         }
 522 }
 523
 524
 525 /**
 526  * Generate a list of changes using an Enhanced system (uses javascript).
 527  */
 528 class EnhancedChangesList extends ChangesList {
 529         /**
 530         *  Add the JavaScript file for enhanced changeslist
 531         *  @ return string
 532         */
 533         public function beginRecentChangesList() {
 534                 global $wgStylePath, $wgJsMimeType, $wgStyleVersion;
 535                 $this->rc_cache = array();
 536                 $this->rcMoveIndex = 0;
 537                 $this->rcCacheIndex = 0;
 538                 $this->lastdate = '';
 539                 $this->rclistOpen = false;
 540                 $script = Xml::tags( 'script', array(
 541                         'type' => $wgJsMimeType,
 542                         'src' => $wgStylePath . "/common/enhancedchanges.js?$wgStyleVersion" ), '' );
 543                 return $script;
 544         }
 545         /**
 546          * Format a line for enhanced recentchange (aka with javascript and block of lines).
 547          */
 548         public function recentChangesLine( &$baseRC, $watched = false ) {
 549                 global $wgLang, $wgUser;
 550
 551                 wfProfileIn( __METHOD__ );
 552
 553                 # Create a specialised object
 554                 $rc = RCCacheEntry::newFromParent( $baseRC );
 555
 556                 # Extract fields from DB into the function scope (rc_xxxx variables)
 557                 // FIXME: Would be good to replace this extract() call with something
 558                 // that explicitly initializes variables.
 559                 extract( $rc->mAttribs );
 560                 $curIdEq = array( 'curid' => $rc_cur_id );
 561
 562                 # If it's a new day, add the headline and flush the cache
 563                 $date = $wgLang->date( $rc_timestamp, true );
 564                 $ret = '';
 565                 if( $date != $this->lastdate ) {
 566                         # Process current cache
 567                         $ret = $this->recentChangesBlock();
 568                         $this->rc_cache = array();
 569                         $ret .= Xml::element( 'h4', null, $date );
 570                         $this->lastdate = $date;
 571                 }
 572
 573                 # Should patrol-related stuff be shown?
 574                 if( $wgUser->useRCPatrol() ) {
 575                         $rc->unpatrolled = !$rc_patrolled;
 576                 } else {
 577                         $rc->unpatrolled = false;
 578                 }
 579
 580                 $showdifflinks = true;
 581                 # Make article link
 582                 // Page moves
 583                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 584                         $msg = ( $rc_type == RC_MOVE ) ? "1movedto2" : "1movedto2_redir";
 585                         $clink = wfMsg( $msg, $this->skin->linkKnown( $rc->getTitle(), null,
 586                                 array(), array( 'redirect' => 'no' ) ),
 587                                 $this->skin->linkKnown( $rc->getMovedToTitle() ) );
 588                 // New unpatrolled pages
 589                 } else if( $rc->unpatrolled && $rc_type == RC_NEW ) {
 590                         $clink = $this->skin->linkKnown( $rc->getTitle(), null, array(),
 591                                 array( 'rcid' => $rc_id ) );
 592                 // Log entries
 593                 } else if( $rc_type == RC_LOG ) {
 594                         if( $rc_log_type ) {
 595                                 $logtitle = SpecialPage::getTitleFor( 'Log', $rc_log_type );
 596                                 $clink = '(' . $this->skin->linkKnown( $logtitle,
 597                                         LogPage::logName($rc_log_type) ) . ')';
 598                         } else {
 599                                 $clink = $this->skin->link( $rc->getTitle() );
 600                         }
 601                         $watched = false;
 602                 // Log entries (old format) and special pages
 603                 } elseif( $rc_namespace == NS_SPECIAL ) {
 604                         list( $specialName, $logtype ) = SpecialPage::resolveAliasWithSubpage( $rc_title );
 605                         if ( $specialName == 'Log' ) {
 606                                 # Log updates, etc
 607                                 $logname = LogPage::logName( $logtype );
 608                                 $clink = '(' . $this->skin->linkKnown( $rc->getTitle(), $logname ) . ')';
 609                         } else {
 610                                 wfDebug( "Unexpected special page in recentchanges\n" );
 611                                 $clink = '';
 612                         }
 613                 // Edits
 614                 } else {
 615                         $clink = $this->skin->linkKnown( $rc->getTitle() );
 616                 }
 617
 618                 # Don't show unusable diff links
 619                 if ( !ChangesList::userCan($rc,Revision::DELETED_TEXT) ) {
 620                         $showdifflinks = false;
 621                 }
 622
 623                 $time = $wgLang->time( $rc_timestamp, true, true );
 624                 $rc->watched = $watched;
 625                 $rc->link = $clink;
 626                 $rc->timestamp = $time;
 627                 $rc->numberofWatchingusers = $baseRC->numberofWatchingusers;
 628
 629                 # Make "cur" and "diff" links.  Do not use link(), it is too slow if
 630                 # called too many times (50% of CPU time on RecentChanges!).
 631                 if( $rc->unpatrolled ) {
 632                         $rcIdQuery = array( 'rcid' => $rc_id );
 633                 } else {
 634                         $rcIdQuery = array();
 635                 }
 636                 $querycur = $curIdEq + array( 'diff' => '0', 'oldid' => $rc_this_oldid );
 637                 $querydiff = $curIdEq + array( 'diff' => $rc_this_oldid, 'oldid' =>
 638                         $rc_last_oldid ) + $rcIdQuery;
 639
 640                 if( !$showdifflinks ) {
 641                         $curLink = $this->message['cur'];
 642                         $diffLink = $this->message['diff'];
 643                 } else if( in_array( $rc_type, array(RC_NEW,RC_LOG,RC_MOVE,RC_MOVE_OVER_REDIRECT) ) ) {
 644                         if ( $rc_type != RC_NEW ) {
 645                                 $curLink = $this->message['cur'];
 646                         } else {
 647                                 $curUrl = htmlspecialchars( $rc->getTitle()->getLinkUrl( $querycur ) );
 648                                 $curLink = "<a href=\"$curUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['cur']}</a>";
 649                         }
 650                         $diffLink = $this->message['diff'];
 651                 } else {
 652                         $diffUrl = htmlspecialchars( $rc->getTitle()->getLinkUrl( $querydiff ) );
 653                         $curUrl = htmlspecialchars( $rc->getTitle()->getLinkUrl( $querycur ) );
 654                         $diffLink = "<a href=\"$diffUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['diff']}</a>";
 655                         $curLink = "<a href=\"$curUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['cur']}</a>";
 656                 }
 657
 658                 # Make "last" link
 659                 if( !$showdifflinks || !$rc_last_oldid ) {
 660                         $lastLink = $this->message['last'];
 661                 } else if( $rc_type == RC_LOG || $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 662                         $lastLink = $this->message['last'];
 663                 } else {
 664                         $lastLink = $this->skin->linkKnown( $rc->getTitle(), $this->message['last'],
 665                                 array(), $curIdEq + array('diff' => $rc_this_oldid, 'oldid' => $rc_last_oldid) + $rcIdQuery );
 666                 }
 667
 668                 # Make user links
 669                 if( $this->isDeleted($rc,Revision::DELETED_USER) ) {
 670                         $rc->userlink = ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 671                 } else {
 672                         $rc->userlink = $this->skin->userLink( $rc_user, $rc_user_text );
 673                         $rc->usertalklink = $this->skin->userToolLinks( $rc_user, $rc_user_text );
 674                 }
 675
 676                 $rc->lastlink = $lastLink;
 677                 $rc->curlink  = $curLink;
 678                 $rc->difflink = $diffLink;
 679
 680                 # Put accumulated information into the cache, for later display
 681                 # Page moves go on their own line
 682                 $title = $rc->getTitle();
 683                 $secureName = $title->getPrefixedDBkey();
 684                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 685                         # Use an @ character to prevent collision with page names
 686                         $this->rc_cache['@@' . ($this->rcMoveIndex++)] = array($rc);
 687                 } else {
 688                         # Logs are grouped by type
 689                         if( $rc_type == RC_LOG ){
 690                                 $secureName = SpecialPage::getTitleFor( 'Log', $rc_log_type )->getPrefixedDBkey();
 691                         }
 692                         if( !isset( $this->rc_cache[$secureName] ) ) {
 693                                 $this->rc_cache[$secureName] = array();
 694                         }
 695
 696                         array_push( $this->rc_cache[$secureName], $rc );
 697                 }
 698
 699                 wfProfileOut( __METHOD__ );
 700
 701                 return $ret;
 702         }
 703
 704         /**
 705          * Enhanced RC group
 706          */
 707         protected function recentChangesBlockGroup( $block ) {
 708                 global $wgLang, $wgContLang, $wgRCShowChangedSize;
 709
 710                 wfProfileIn( __METHOD__ );
 711
 712                 $r = '<table cellpadding="0" cellspacing="0" border="0" style="background: none"><tr>';
 713
 714                 # Collate list of users
 715                 $userlinks = array();
 716                 # Other properties
 717                 $unpatrolled = false;
 718                 $isnew = false;
 719                 $curId = $currentRevision = 0;
 720                 # Some catalyst variables...
 721                 $namehidden = true;
 722                 $allLogs = true;
 723                 foreach( $block as $rcObj ) {
 724                         $oldid = $rcObj->mAttribs['rc_last_oldid'];
 725                         if( $rcObj->mAttribs['rc_new'] ) {
 726                                 $isnew = true;
 727                         }
 728                         // If all log actions to this page were hidden, then don't
 729                         // give the name of the affected page for this block!
 730                         if( !$this->isDeleted( $rcObj, LogPage::DELETED_ACTION ) ) {
 731                                 $namehidden = false;
 732                         }
 733                         $u = $rcObj->userlink;
 734                         if( !isset( $userlinks[$u] ) ) {
 735                                 $userlinks[$u] = 0;
 736                         }
 737                         if( $rcObj->unpatrolled ) {
 738                                 $unpatrolled = true;
 739                         }
 740                         if( $rcObj->mAttribs['rc_type'] != RC_LOG ) {
 741                                 $allLogs = false;
 742                         }
 743                         # Get the latest entry with a page_id and oldid
 744                         # since logs may not have these.
 745                         if( !$curId && $rcObj->mAttribs['rc_cur_id'] ) {
 746                                 $curId = $rcObj->mAttribs['rc_cur_id'];
 747                         }
 748                         if( !$currentRevision && $rcObj->mAttribs['rc_this_oldid'] ) {
 749                                 $currentRevision = $rcObj->mAttribs['rc_this_oldid'];
 750                         }
 751
 752                         $bot = $rcObj->mAttribs['rc_bot'];
 753                         $userlinks[$u]++;
 754                 }
 755
 756                 # Sort the list and convert to text
 757                 krsort( $userlinks );
 758                 asort( $userlinks );
 759                 $users = array();
 760                 foreach( $userlinks as $userlink => $count) {
 761                         $text = $userlink;
 762                         $text .= $wgContLang->getDirMark();
 763                         if( $count > 1 ) {
 764                                 $text .= ' (' . $wgLang->formatNum( $count ) . '×)';
 765                         }
 766                         array_push( $users, $text );
 767                 }
 768
 769                 $users = ' <span class="changedby">[' .
 770                         implode( $this->message['semicolon-separator'], $users ) . ']</span>';
 771
 772                 # ID for JS visibility toggle
 773                 $jsid = $this->rcCacheIndex;
 774                 # onclick handler to toggle hidden/expanded
 775                 $toggleLink = "onclick='toggleVisibility($jsid); return false'";
 776                 # Title for <a> tags
 777                 $expandTitle = htmlspecialchars( wfMsg( 'rc-enhanced-expand' ) );
 778                 $closeTitle = htmlspecialchars( wfMsg( 'rc-enhanced-hide' ) );
 779
 780                 $tl = "<span id='mw-rc-openarrow-$jsid' class='mw-changeslist-expanded' style='visibility:hidden'><a href='#' $toggleLink title='$expandTitle'>" . $this->sideArrow() . "</a></span>";
 781                 $tl .= "<span id='mw-rc-closearrow-$jsid' class='mw-changeslist-hidden' style='display:none'><a href='#' $toggleLink title='$closeTitle'>" . $this->downArrow() . "</a></span>";
 782                 $r .= '<td valign="top" style="white-space: nowrap"><tt>'.$tl.'&nbsp;';
 783
 784                 # Main line
 785                 $r .= $this->recentChangesFlags( $isnew, false, $unpatrolled, '&nbsp;', $bot );
 786
 787                 # Timestamp
 788                 $r .= '&nbsp;'.$block[0]->timestamp.'&nbsp;</tt></td><td>';
 789
 790                 # Article link
 791                 if( $namehidden ) {
 792                         $r .= ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-event' ) . '</span>';
 793                 } else if( $allLogs ) {
 794                         $r .= $this->maybeWatchedLink( $block[0]->link, $block[0]->watched );
 795                 } else {
 796                         $this->insertArticleLink( $r, $block[0], $block[0]->unpatrolled, $block[0]->watched );
 797                 }
 798
 799                 $r .= $wgContLang->getDirMark();
 800
 801                 $queryParams['curid'] = $curId;
 802                 # Changes message
 803                 $n = count($block);
 804                 static $nchanges = array();
 805                 if ( !isset( $nchanges[$n] ) ) {
 806                         $nchanges[$n] = wfMsgExt( 'nchanges', array( 'parsemag', 'escape' ), $wgLang->formatNum( $n ) );
 807                 }
 808                 # Total change link
 809                 $r .= ' ';
 810                 if( !$allLogs ) {
 811                         $r .= '(';
 812                         if( !ChangesList::userCan( $rcObj, Revision::DELETED_TEXT ) ) {
 813                                 $r .= $nchanges[$n];
 814                         } else if( $isnew ) {
 815                                 $r .= $nchanges[$n];
 816                         } else {
 817                                 $params = $queryParams;
 818                                 $params['diff'] = $currentRevision;
 819                                 $params['oldid'] = $oldid;
 820
 821                                 $r .= $this->skin->link(
 822                                         $block[0]->getTitle(),
 823                                         $nchanges[$n],
 824                                         array(),
 825                                         $params,
 826                                         array( 'known', 'noclasses' )
 827                                 );
 828                         }
 829                 }
 830
 831                 # History
 832                 if( $allLogs ) {
 833                         // don't show history link for logs
 834                 } else if( $namehidden || !$block[0]->getTitle()->exists() ) {
 835                         $r .= $this->message['pipe-separator'] . $this->message['hist'] . ')';
 836                 } else {
 837                         $params = $queryParams;
 838                         $params['action'] = 'history';
 839
 840                         $r .= $this->message['pipe-separator'] .
 841                                 $this->skin->link(
 842                                         $block[0]->getTitle(),
 843                                         $this->message['hist'],
 844                                         array(),
 845                                         $params,
 846                                         array( 'known', 'noclasses' )
 847                                 ) . ')';
 848                 }
 849                 $r .= ' . . ';
 850
 851                 # Character difference (does not apply if only log items)
 852                 if( $wgRCShowChangedSize && !$allLogs ) {
 853                         $last = 0;
 854                         $first = count($block) - 1;
 855                         # Some events (like logs) have an "empty" size, so we need to skip those...
 856                         while( $last < $first && $block[$last]->mAttribs['rc_new_len'] === NULL ) {
 857                                 $last++;
 858                         }
 859                         while( $first > $last && $block[$first]->mAttribs['rc_old_len'] === NULL ) {
 860                                 $first--;
 861                         }
 862                         # Get net change
 863                         $chardiff = $rcObj->getCharacterDifference( $block[$first]->mAttribs['rc_old_len'],
 864                                 $block[$last]->mAttribs['rc_new_len'] );
 865
 866                         if( $chardiff == '' ) {
 867                                 $r .= ' ';
 868                         } else {
 869                                 $r .= ' ' . $chardiff. ' . . ';
 870                         }
 871                 }
 872
 873                 $r .= $users;
 874                 $r .= $this->numberofWatchingusers($block[0]->numberofWatchingusers);
 875
 876                 $r .= "</td></tr></table>\n";
 877
 878                 # Sub-entries
 879                 $r .= '<div id="mw-rc-subentries-'.$jsid.'" class="mw-changeslist-hidden">';
 880                 $r .= '<table cellpadding="0" cellspacing="0"  border="0" style="background: none">';
 881                 foreach( $block as $rcObj ) {
 882                         # Extract fields from DB into the function scope (rc_xxxx variables)
 883                         // FIXME: Would be good to replace this extract() call with something
 884                         // that explicitly initializes variables.
 885                         # Classes to apply -- TODO implement
 886                         $classes = array();
 887                         extract( $rcObj->mAttribs );
 888
 889                         #$r .= '<tr><td valign="top">'.$this->spacerArrow();
 890                         $r .= '<tr><td valign="top">';
 891                         $r .= '<tt>'.$this->spacerIndent() . $this->spacerIndent();
 892                         $r .= $this->recentChangesFlags( $rc_new, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot );
 893                         $r .= '&nbsp;</tt></td><td valign="top">';
 894
 895                         $params = $queryParams;
 896
 897                         if( $rc_this_oldid != 0 ) {
 898                                 $params['oldid'] = $rc_this_oldid;
 899                         }
 900
 901                         # Log timestamp
 902                         if( $rc_type == RC_LOG ) {
 903                                 $link = '<tt>'.$rcObj->timestamp.'</tt> ';
 904                         # Revision link
 905                         } else if( !ChangesList::userCan($rcObj,Revision::DELETED_TEXT) ) {
 906                                 $link = '<span class="history-deleted"><tt>'.$rcObj->timestamp.'</tt></span> ';
 907                         } else {
 908                                 if ( $rcObj->unpatrolled && $rc_type == RC_NEW) {
 909                                         $params['rcid'] = $rcObj->mAttribs['rc_id'];
 910                                 }
 911
 912                                 $link = '<tt>' .
 913                                         $this->skin->link(
 914                                                 $rcObj->getTitle(),
 915                                                 $rcObj->timestamp,
 916                                                 array(),
 917                                                 $params,
 918                                                 array( 'known', 'noclasses' )
 919                                         ) . '</tt>';
 920                                 if( $this->isDeleted($rcObj,Revision::DELETED_TEXT) )
 921                                         $link = '<span class="history-deleted">'.$link.'</span> ';
 922                         }
 923                         $r .= $link;
 924
 925                         if ( !$rc_type == RC_LOG || $rc_type == RC_NEW ) {
 926                                 $r .= ' (';
 927                                 $r .= $rcObj->curlink;
 928                                 $r .= $this->message['pipe-separator'];
 929                                 $r .= $rcObj->lastlink;
 930                                 $r .= ')';
 931                         }
 932                         $r .= ' . . ';
 933
 934                         # Character diff
 935                         if( $wgRCShowChangedSize ) {
 936                                 $r .= ( $rcObj->getCharacterDifference() == '' ? '' : $rcObj->getCharacterDifference() . ' . . ' ) ;
 937                         }
 938                         # User links
 939                         $r .= $rcObj->userlink;
 940                         $r .= $rcObj->usertalklink;
 941                         // log action
 942                         $this->insertAction( $r, $rcObj );
 943                         // log comment
 944                         $this->insertComment( $r, $rcObj );
 945                         # Rollback
 946                         $this->insertRollback( $r, $rcObj );
 947                         # Tags
 948                         $this->insertTags( $r, $rcObj, $classes );
 949
 950                         $r .= "</td></tr>\n";
 951                 }
 952                 $r .= "</table></div>\n";
 953
 954                 $this->rcCacheIndex++;
 955
 956                 wfProfileOut( __METHOD__ );
 957
 958                 return $r;
 959         }
 960
 961         /**
 962          * Generate HTML for an arrow or placeholder graphic
 963          * @param string $dir one of '', 'd', 'l', 'r'
 964          * @param string $alt text
 965          * @param string $title text
 966          * @return string HTML <img> tag
 967          */
 968         protected function arrow( $dir, $alt='', $title='' ) {
 969                 global $wgStylePath;
 970                 $encUrl = htmlspecialchars( $wgStylePath . '/common/images/Arr_' . $dir . '.png' );
 971                 $encAlt = htmlspecialchars( $alt );
 972                 $encTitle = htmlspecialchars( $title );
 973                 return "<img src=\"$encUrl\" width=\"12\" height=\"12\" alt=\"$encAlt\" title=\"$encTitle\" />";
 974         }
 975
 976         /**
 977          * Generate HTML for a right- or left-facing arrow,
 978          * depending on language direction.
 979          * @return string HTML <img> tag
 980          */
 981         protected function sideArrow() {
 982                 global $wgContLang;
 983                 $dir = $wgContLang->isRTL() ? 'l' : 'r';
 984                 return $this->arrow( $dir, '+', wfMsg( 'rc-enhanced-expand' ) );
 985         }
 986
 987         /**
 988          * Generate HTML for a down-facing arrow
 989          * depending on language direction.
 990          * @return string HTML <img> tag
 991          */
 992         protected function downArrow() {
 993                 return $this->arrow( 'd', '-', wfMsg( 'rc-enhanced-hide' ) );
 994         }
 995
 996         /**
 997          * Generate HTML for a spacer image
 998          * @return string HTML <img> tag
 999          */
1000         protected function spacerArrow() {
1001                 return $this->arrow( '', codepointToUtf8( 0xa0 ) ); // non-breaking space
1002         }
1003
1004         /**
1005          * Add a set of spaces
1006          * @return string HTML <td> tag
1007          */
1008         protected function spacerIndent() {
1009                 return '&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;';
1010         }
1011
1012         /**
1013          * Enhanced RC ungrouped line.
1014          * @return string a HTML formated line (generated using $r)
1015          */
1016         protected function recentChangesBlockLine( $rcObj ) {
1017                 global $wgRCShowChangedSize;
1018
1019                 wfProfileIn( __METHOD__ );
1020
1021                 # Extract fields from DB into the function scope (rc_xxxx variables)
1022                 // FIXME: Would be good to replace this extract() call with something
1023                 // that explicitly initializes variables.
1024                 $classes = array(); // TODO implement
1025                 extract( $rcObj->mAttribs );
1026                 $query['curid'] = $rc_cur_id;
1027
1028                 $r = '<table cellspacing="0" cellpadding="0" border="0" style="background: none"><tr>';
1029                 $r .= '<td valign="top" style="white-space: nowrap"><tt>' . $this->spacerArrow() . '&nbsp;';
1030                 # Flag and Timestamp
1031                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
1032                         $r .= '&nbsp;&nbsp;&nbsp;&nbsp;'; // 4 flags -> 4 spaces
1033                 } else {
1034                         $r .= $this->recentChangesFlags( $rc_type == RC_NEW, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot );
1035                 }
1036                 $r .= '&nbsp;'.$rcObj->timestamp.'&nbsp;</tt></td><td>';
1037                 # Article or log link
1038                 if( $rc_log_type ) {
1039                         $logtitle = Title::newFromText( "Log/$rc_log_type", NS_SPECIAL );
1040                         $logname = LogPage::logName( $rc_log_type );
1041                         $r .= '(' . $this->skin->link(
1042                                 $logtitle,
1043                                 $logname,
1044                                 array(),
1045                                 array(),
1046                                 array( 'known', 'noclasses' )
1047                         ) . ')';
1048                 } else {
1049                         $this->insertArticleLink( $r, $rcObj, $rcObj->unpatrolled, $rcObj->watched );
1050                 }
1051                 # Diff and hist links
1052                 if ( $rc_type != RC_LOG ) {
1053                         $r .= ' ('. $rcObj->difflink . $this->message['pipe-separator'];
1054                         $query['action'] = 'history';
1055                         $r .= $this->skin->link(
1056                                 $rcObj->getTitle(),
1057                                 $this->message['hist'],
1058                                 array(),
1059                                 $query,
1060                                 array( 'known', 'noclasses' )
1061                         ) . ')';
1062                 }
1063                 $r .= ' . . ';
1064                 # Character diff
1065                 if( $wgRCShowChangedSize && ($cd = $rcObj->getCharacterDifference()) ) {
1066                         $r .= "$cd . . ";
1067                 }
1068                 # User/talk
1069                 $r .= ' '.$rcObj->userlink . $rcObj->usertalklink;
1070                 # Log action (if any)
1071                 if( $rc_log_type ) {
1072                         if( $this->isDeleted($rcObj,LogPage::DELETED_ACTION) ) {
1073                                 $r .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
1074                         } else {
1075                                 $r .= ' ' . LogPage::actionText( $rc_log_type, $rc_log_action, $rcObj->getTitle(),
1076                                         $this->skin, LogPage::extractParams($rc_params), true, true );
1077                         }
1078                 }
1079                 $this->insertComment( $r, $rcObj );
1080                 $this->insertRollback( $r, $rcObj );
1081                 # Tags
1082                 $this->insertTags( $r, $rcObj, $classes );
1083                 # Show how many people are watching this if enabled
1084                 $r .= $this->numberofWatchingusers($rcObj->numberofWatchingusers);
1085
1086                 $r .= "</td></tr></table>\n";
1087
1088                 wfProfileOut( __METHOD__ );
1089
1090                 return $r;
1091         }
1092
1093         /**
1094          * If enhanced RC is in use, this function takes the previously cached
1095          * RC lines, arranges them, and outputs the HTML
1096          */
1097         protected function recentChangesBlock() {
1098                 if( count ( $this->rc_cache ) == 0 ) {
1099                         return '';
1100                 }
1101
1102                 wfProfileIn( __METHOD__ );
1103
1104                 $blockOut = '';
1105                 foreach( $this->rc_cache as $block ) {
1106                         if( count( $block ) < 2 ) {
1107                                 $blockOut .= $this->recentChangesBlockLine( array_shift( $block ) );
1108                         } else {
1109                                 $blockOut .= $this->recentChangesBlockGroup( $block );
1110                         }
1111                 }
1112
1113                 wfProfileOut( __METHOD__ );
1114
1115                 return '<div>'.$blockOut.'</div>';
1116         }
1117
1118         /**
1119          * Returns text for the end of RC
1120          * If enhanced RC is in use, returns pretty much all the text
1121          */
1122         public function endRecentChangesList() {
1123                 return $this->recentChangesBlock() . parent::endRecentChangesList();
1124         }
1125
1126 }