includes/ChangesList.php

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