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                 $attribs = array( 'tabindex' => $baseRC->counter );
 567
 568                 if( !$showdifflinks ) {
 569                         $curLink = $this->message['cur'];
 570                         $diffLink = $this->message['diff'];
 571                 } else if( in_array( $rc_type, array(RC_NEW,RC_LOG,RC_MOVE,RC_MOVE_OVER_REDIRECT) ) ) {
 572                         if ( $rc_type != RC_NEW ) {
 573                                 $curLink = $this->message['cur'];
 574                         } else {
 575                                 $curUrl = wfUrlencode( wfAppendQuery( $rc->getTitle()->getLinkUrl(), $querycur ) );
 576                                 $curLink = "<a href=\"$curUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['cur']}</a>";
 577                         }
 578                         $diffLink = $this->message['diff'];
 579                 } else {
 580                         $url = $rc->getTitle()->getLinkUrl();
 581                         $diffUrl = wfUrlencode( wfAppendQuery( $url, $querydiff ) );
 582                         $curUrl = wfUrlencode( wfAppendQuery( $url, $querycur ) );
 583                         $diffLink = "<a href=\"$diffUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['diff']}</a>";
 584                         $curLink = "<a href=\"$curUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['cur']}</a>";
 585                 }
 586
 587                 # Make "last" link
 588                 if( !$showdifflinks || !$rc_last_oldid ) {
 589                     $lastLink = $this->message['last'];
 590                 } else if( $rc_type == RC_LOG || $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 591                         $lastLink = $this->message['last'];
 592                 } else {
 593                         $lastLink = $this->skin->linkKnown( $rc->getTitle(), $this->message['last'],
 594                                 array(), $curIdEq + array('diff' => $rc_this_oldid, 'oldid' => $rc_last_oldid) + $rcIdQuery );
 595                 }
 596
 597                 # Make user links
 598                 if( $this->isDeleted($rc,Revision::DELETED_USER) ) {
 599                         $rc->userlink = ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 600                 } else {
 601                         $rc->userlink = $this->skin->userLink( $rc_user, $rc_user_text );
 602                         $rc->usertalklink = $this->skin->userToolLinks( $rc_user, $rc_user_text );
 603                 }
 604
 605                 $rc->lastlink = $lastLink;
 606                 $rc->curlink  = $curLink;
 607                 $rc->difflink = $diffLink;
 608
 609                 # Put accumulated information into the cache, for later display
 610                 # Page moves go on their own line
 611                 $title = $rc->getTitle();
 612                 $secureName = $title->getPrefixedDBkey();
 613                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 614                         # Use an @ character to prevent collision with page names
 615                         $this->rc_cache['@@' . ($this->rcMoveIndex++)] = array($rc);
 616                 } else {
 617                         # Logs are grouped by type
 618                         if( $rc_type == RC_LOG ){
 619                                 $secureName = SpecialPage::getTitleFor( 'Log', $rc_log_type )->getPrefixedDBkey();
 620                         }
 621                         if( !isset( $this->rc_cache[$secureName] ) ) {
 622                                 $this->rc_cache[$secureName] = array();
 623                         }
 624
 625                         array_push( $this->rc_cache[$secureName], $rc );
 626                 }
 627
 628                 wfProfileOut( __METHOD__ );
 629
 630                 return $ret;
 631         }
 632
 633         /**
 634          * Enhanced RC group
 635          */
 636         protected function recentChangesBlockGroup( $block ) {
 637                 global $wgLang, $wgContLang, $wgRCShowChangedSize;
 638
 639                 wfProfileIn( __METHOD__ );
 640
 641                 $r = '<table cellpadding="0" cellspacing="0" border="0" style="background: none"><tr>';
 642
 643                 # Collate list of users
 644                 $userlinks = array();
 645                 # Other properties
 646                 $unpatrolled = false;
 647                 $isnew = false;
 648                 $curId = $currentRevision = 0;
 649                 # Some catalyst variables...
 650                 $namehidden = true;
 651                 $allLogs = true;
 652                 foreach( $block as $rcObj ) {
 653                         $oldid = $rcObj->mAttribs['rc_last_oldid'];
 654                         if( $rcObj->mAttribs['rc_new'] ) {
 655                                 $isnew = true;
 656                         }
 657                         // If all log actions to this page were hidden, then don't
 658                         // give the name of the affected page for this block!
 659                         if( !$this->isDeleted( $rcObj, LogPage::DELETED_ACTION ) ) {
 660                                 $namehidden = false;
 661                         }
 662                         $u = $rcObj->userlink;
 663                         if( !isset( $userlinks[$u] ) ) {
 664                                 $userlinks[$u] = 0;
 665                         }
 666                         if( $rcObj->unpatrolled ) {
 667                                 $unpatrolled = true;
 668                         }
 669                         if( $rcObj->mAttribs['rc_type'] != RC_LOG ) {
 670                                 $allLogs = false;
 671                         }
 672                         # Get the latest entry with a page_id and oldid
 673                         # since logs may not have these.
 674                         if( !$curId && $rcObj->mAttribs['rc_cur_id'] ) {
 675                                 $curId = $rcObj->mAttribs['rc_cur_id'];
 676                         }
 677                         if( !$currentRevision && $rcObj->mAttribs['rc_this_oldid'] ) {
 678                                 $currentRevision = $rcObj->mAttribs['rc_this_oldid'];
 679                         }
 680
 681                         $bot = $rcObj->mAttribs['rc_bot'];
 682                         $userlinks[$u]++;
 683                 }
 684
 685                 # Sort the list and convert to text
 686                 krsort( $userlinks );
 687                 asort( $userlinks );
 688                 $users = array();
 689                 foreach( $userlinks as $userlink => $count) {
 690                         $text = $userlink;
 691                         $text .= $wgContLang->getDirMark();
 692                         if( $count > 1 ) {
 693                                 $text .= ' (' . $wgLang->formatNum( $count ) . '×)';
 694                         }
 695                         array_push( $users, $text );
 696                 }
 697
 698                 $users = ' <span class="changedby">[' .
 699                         implode( $this->message['semicolon-separator'], $users ) . ']</span>';
 700
 701                 # ID for JS visibility toggle
 702                 $jsid = $this->rcCacheIndex;
 703                 # onclick handler to toggle hidden/expanded
 704                 $toggleLink = "onclick='toggleVisibility($jsid); return false'";
 705                 # Title for <a> tags
 706                 $expandTitle = htmlspecialchars( wfMsg( 'rc-enhanced-expand' ) );
 707                 $closeTitle = htmlspecialchars( wfMsg( 'rc-enhanced-hide' ) );
 708
 709                 $tl = "<span id='mw-rc-openarrow-$jsid' class='mw-changeslist-expanded' style='visibility:hidden'><a href='#' $toggleLink title='$expandTitle'>" . $this->sideArrow() . "</a></span>";
 710                 $tl .= "<span id='mw-rc-closearrow-$jsid' class='mw-changeslist-hidden' style='display:none'><a href='#' $toggleLink title='$closeTitle'>" . $this->downArrow() . "</a></span>";
 711                 $r .= '<td valign="top" style="white-space: nowrap"><tt>'.$tl.'&nbsp;';
 712
 713                 # Main line
 714                 $r .= $this->recentChangesFlags( $isnew, false, $unpatrolled, '&nbsp;', $bot );
 715
 716                 # Timestamp
 717                 $r .= '&nbsp;'.$block[0]->timestamp.'&nbsp;</tt></td><td>';
 718
 719                 # Article link
 720                 if( $namehidden ) {
 721                         $r .= ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-event' ) . '</span>';
 722                 } else if( $allLogs ) {
 723                         $r .= $this->maybeWatchedLink( $block[0]->link, $block[0]->watched );
 724                 } else {
 725                         $this->insertArticleLink( $r, $block[0], $block[0]->unpatrolled, $block[0]->watched );
 726                 }
 727
 728                 $r .= $wgContLang->getDirMark();
 729
 730                 $curIdEq = 'curid=' . $curId;
 731                 # Changes message
 732                 $n = count($block);
 733                 static $nchanges = array();
 734                 if ( !isset( $nchanges[$n] ) ) {
 735                         $nchanges[$n] = wfMsgExt( 'nchanges', array( 'parsemag', 'escape' ), $wgLang->formatNum( $n ) );
 736                 }
 737                 # Total change link
 738                 $r .= ' ';
 739                 if( !$allLogs ) {
 740                         $r .= '(';
 741                         if( !ChangesList::userCan( $rcObj, Revision::DELETED_TEXT ) ) {
 742                                 $r .= $nchanges[$n];
 743                         } else if( $isnew ) {
 744                                 $r .= $nchanges[$n];
 745                         } else {
 746                                 $r .= $this->skin->makeKnownLinkObj( $block[0]->getTitle(),
 747                                         $nchanges[$n], $curIdEq."&diff=$currentRevision&oldid=$oldid" );
 748                         }
 749                 }
 750
 751                 # History
 752                 if( $allLogs ) {
 753                         // don't show history link for logs
 754                 } else if( $namehidden || !$block[0]->getTitle()->exists() ) {
 755                         $r .= $this->message['semicolon-separator'] . $this->message['hist'] . ')';
 756                 } else {
 757                         $r .= $this->message['semicolon-separator'] . $this->skin->makeKnownLinkObj( $block[0]->getTitle(),
 758                                 $this->message['hist'], $curIdEq . '&action=history' ) . ')';
 759                 }
 760                 $r .= ' . . ';
 761
 762                 # Character difference (does not apply if only log items)
 763                 if( $wgRCShowChangedSize && !$allLogs ) {
 764                         $last = 0;
 765                         $first = count($block) - 1;
 766                         # Some events (like logs) have an "empty" size, so we need to skip those...
 767                         while( $last < $first && $block[$last]->mAttribs['rc_new_len'] === NULL ) {
 768                                 $last++;
 769                         }
 770                         while( $first > $last && $block[$first]->mAttribs['rc_old_len'] === NULL ) {
 771                                 $first--;
 772                         }
 773                         # Get net change
 774                         $chardiff = $rcObj->getCharacterDifference( $block[$first]->mAttribs['rc_old_len'],
 775                                 $block[$last]->mAttribs['rc_new_len'] );
 776
 777                         if( $chardiff == '' ) {
 778                                 $r .= ' ';
 779                         } else {
 780                                 $r .= ' ' . $chardiff. ' . . ';
 781                         }
 782                 }
 783
 784                 $r .= $users;
 785                 $r .= $this->numberofWatchingusers($block[0]->numberofWatchingusers);
 786
 787                 $r .= "</td></tr></table>\n";
 788
 789                 # Sub-entries
 790                 $r .= '<div id="mw-rc-subentries-'.$jsid.'" class="mw-changeslist-hidden">';
 791                 $r .= '<table cellpadding="0" cellspacing="0"  border="0" style="background: none">';
 792                 foreach( $block as $rcObj ) {
 793                         # Extract fields from DB into the function scope (rc_xxxx variables)
 794                         // FIXME: Would be good to replace this extract() call with something
 795                         // that explicitly initializes variables.
 796                         # Classes to apply -- TODO implement
 797                         $classes = array();
 798                         extract( $rcObj->mAttribs );
 799
 800                         #$r .= '<tr><td valign="top">'.$this->spacerArrow();
 801                         $r .= '<tr><td valign="top">';
 802                         $r .= '<tt>'.$this->spacerIndent() . $this->spacerIndent();
 803                         $r .= $this->recentChangesFlags( $rc_new, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot );
 804                         $r .= '&nbsp;</tt></td><td valign="top">';
 805
 806                         $o = '';
 807                         if( $rc_this_oldid != 0 ) {
 808                                 $o = 'oldid='.$rc_this_oldid;
 809                         }
 810                         # Log timestamp
 811                         if( $rc_type == RC_LOG ) {
 812                                 $link = '<tt>'.$rcObj->timestamp.'</tt> ';
 813                         # Revision link
 814                         } else if( !ChangesList::userCan($rcObj,Revision::DELETED_TEXT) ) {
 815                                 $link = '<span class="history-deleted"><tt>'.$rcObj->timestamp.'</tt></span> ';
 816                         } else {
 817                                 $rcIdEq = ($rcObj->unpatrolled && $rc_type == RC_NEW) ?
 818                                         '&rcid='.$rcObj->mAttribs['rc_id'] : '';
 819                                 $link = '<tt>'.$this->skin->makeKnownLinkObj( $rcObj->getTitle(),
 820                                         $rcObj->timestamp, $curIdEq.'&'.$o.$rcIdEq ).'</tt>';
 821                                 if( $this->isDeleted($rcObj,Revision::DELETED_TEXT) )
 822                                         $link = '<span class="history-deleted">'.$link.'</span> ';
 823                         }
 824                         $r .= $link;
 825
 826                         if ( !$rc_type == RC_LOG || $rc_type == RC_NEW ) {
 827                                 $r .= ' (';
 828                                 $r .= $rcObj->curlink;
 829                                 $r .= $this->message['semicolon-separator'];
 830                                 $r .= $rcObj->lastlink;
 831                                 $r .= ')';
 832                         }
 833                         $r .= ' . . ';
 834
 835                         # Character diff
 836                         if( $wgRCShowChangedSize ) {
 837                                 $r .= ( $rcObj->getCharacterDifference() == '' ? '' : $rcObj->getCharacterDifference() . ' . . ' ) ;
 838                         }
 839                         # User links
 840                         $r .= $rcObj->userlink;
 841                         $r .= $rcObj->usertalklink;
 842                         // log action
 843                         $this->insertAction( $r, $rcObj );
 844                         // log comment
 845                         $this->insertComment( $r, $rcObj );
 846                         # Rollback
 847                         $this->insertRollback( $r, $rcObj );
 848                         # Tags
 849                         $this->insertTags( $r, $rcObj, $classes );
 850
 851                         # Mark revision as deleted
 852                         if( !$rc_log_type && $this->isDeleted($rcObj,Revision::DELETED_TEXT) ) {
 853                                 $r .= ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 854                         }
 855
 856                         $r .= "</td></tr>\n";
 857                 }
 858                 $r .= "</table></div>\n";
 859
 860                 $this->rcCacheIndex++;
 861
 862                 wfProfileOut( __METHOD__ );
 863
 864                 return $r;
 865         }
 866
 867         /**
 868          * Generate HTML for an arrow or placeholder graphic
 869          * @param string $dir one of '', 'd', 'l', 'r'
 870          * @param string $alt text
 871          * @param string $title text
 872          * @return string HTML <img> tag
 873          */
 874         protected function arrow( $dir, $alt='', $title='' ) {
 875                 global $wgStylePath;
 876                 $encUrl = htmlspecialchars( $wgStylePath . '/common/images/Arr_' . $dir . '.png' );
 877                 $encAlt = htmlspecialchars( $alt );
 878                 $encTitle = htmlspecialchars( $title );
 879                 return "<img src=\"$encUrl\" width=\"12\" height=\"12\" alt=\"$encAlt\" title=\"$encTitle\" />";
 880         }
 881
 882         /**
 883          * Generate HTML for a right- or left-facing arrow,
 884          * depending on language direction.
 885          * @return string HTML <img> tag
 886          */
 887         protected function sideArrow() {
 888                 global $wgContLang;
 889                 $dir = $wgContLang->isRTL() ? 'l' : 'r';
 890                 return $this->arrow( $dir, '+', wfMsg( 'rc-enhanced-expand' ) );
 891         }
 892
 893         /**
 894          * Generate HTML for a down-facing arrow
 895          * depending on language direction.
 896          * @return string HTML <img> tag
 897          */
 898         protected function downArrow() {
 899                 return $this->arrow( 'd', '-', wfMsg( 'rc-enhanced-hide' ) );
 900         }
 901
 902         /**
 903          * Generate HTML for a spacer image
 904          * @return string HTML <img> tag
 905          */
 906         protected function spacerArrow() {
 907                 return $this->arrow( '', codepointToUtf8( 0xa0 ) ); // non-breaking space
 908         }
 909
 910         /**
 911          * Add a set of spaces
 912          * @return string HTML <td> tag
 913          */
 914         protected function spacerIndent() {
 915                 return '&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;';
 916         }
 917
 918         /**
 919          * Enhanced RC ungrouped line.
 920          * @return string a HTML formated line (generated using $r)
 921          */
 922         protected function recentChangesBlockLine( $rcObj ) {
 923                 global $wgContLang, $wgRCShowChangedSize;
 924
 925                 wfProfileIn( __METHOD__ );
 926
 927                 # Extract fields from DB into the function scope (rc_xxxx variables)
 928                 // FIXME: Would be good to replace this extract() call with something
 929                 // that explicitly initializes variables.
 930                 $classes = array(); // TODO implement
 931                 extract( $rcObj->mAttribs );
 932                 $curIdEq = "curid={$rc_cur_id}";
 933
 934                 $r = '<table cellspacing="0" cellpadding="0" border="0" style="background: none"><tr>';
 935                 $r .= '<td valign="top" style="white-space: nowrap"><tt>' . $this->spacerArrow() . '&nbsp;';
 936                 # Flag and Timestamp
 937                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 938                         $r .= '&nbsp;&nbsp;&nbsp;&nbsp;'; // 4 flags -> 4 spaces
 939                 } else {
 940                         $r .= $this->recentChangesFlags( $rc_type == RC_NEW, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot );
 941                 }
 942                 $r .= '&nbsp;'.$rcObj->timestamp.'&nbsp;</tt></td><td>';
 943                 # Article or log link
 944                 if( $rc_log_type ) {
 945                         $logtitle = Title::newFromText( "Log/$rc_log_type", NS_SPECIAL );
 946                         $logname = LogPage::logName( $rc_log_type );
 947                         $r .= '(' . $this->skin->makeKnownLinkObj($logtitle, $logname ) . ')';
 948                 } else {
 949                         $this->insertArticleLink( $r, $rcObj, $rcObj->unpatrolled, $rcObj->watched );
 950                 }
 951                 # Diff and hist links
 952                 if ( $rc_type != RC_LOG ) {
 953                         $r .= ' ('. $rcObj->difflink . $this->message['semicolon-separator'];
 954                         $r .= $this->skin->makeKnownLinkObj( $rcObj->getTitle(), $this->message['hist'],
 955                                 $curIdEq.'&action=history' ) . ')';
 956                 }
 957                 $r .= ' . . ';
 958                 # Character diff
 959                 if( $wgRCShowChangedSize && ($cd = $rcObj->getCharacterDifference()) ) {
 960                         $r .= "$cd . . ";
 961                 }
 962                 # User/talk
 963                 $r .= ' '.$rcObj->userlink . $rcObj->usertalklink;
 964                 # Log action (if any)
 965                 if( $rc_log_type ) {
 966                         if( $this->isDeleted($rcObj,LogPage::DELETED_ACTION) ) {
 967                                 $r .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 968                         } else {
 969                                 $r .= ' ' . LogPage::actionText( $rc_log_type, $rc_log_action, $rcObj->getTitle(),
 970                                         $this->skin, LogPage::extractParams($rc_params), true, true );
 971                         }
 972                 }
 973                 $this->insertComment( $r, $rcObj );
 974                 $this->insertRollback( $r, $rcObj );
 975                 # Tags
 976                 $this->insertTags( $r, $rcObj, $classes );
 977                 # Show how many people are watching this if enabled
 978                 $r .= $this->numberofWatchingusers($rcObj->numberofWatchingusers);
 979
 980                 $r .= "</td></tr></table>\n";
 981
 982                 wfProfileOut( __METHOD__ );
 983
 984                 return $r;
 985         }
 986
 987         /**
 988          * If enhanced RC is in use, this function takes the previously cached
 989          * RC lines, arranges them, and outputs the HTML
 990          */
 991         protected function recentChangesBlock() {
 992                 if( count ( $this->rc_cache ) == 0 ) {
 993                         return '';
 994                 }
 995
 996                 wfProfileIn( __METHOD__ );
 997
 998                 $blockOut = '';
 999                 foreach( $this->rc_cache as $block ) {
1000                         if( count( $block ) < 2 ) {
1001                                 $blockOut .= $this->recentChangesBlockLine( array_shift( $block ) );
1002                         } else {
1003                                 $blockOut .= $this->recentChangesBlockGroup( $block );
1004                         }
1005                 }
1006
1007                 wfProfileOut( __METHOD__ );
1008
1009                 return '<div>'.$blockOut.'</div>';
1010         }
1011
1012         /**
1013          * Returns text for the end of RC
1014          * If enhanced RC is in use, returns pretty much all the text
1015          */
1016         public function endRecentChangesList() {
1017                 return $this->recentChangesBlock() . parent::endRecentChangesList();
1018         }
1019
1020 }