includes/ChangesList.php

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