includes/ChangesList.php

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