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'],
 143                         'action=history' ) . ') . . ';
 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( $rc->mAttribs['rc_type'] == RC_NEW || $rc->mAttribs['rc_type'] == RC_LOG ) {
 172                         $diffLink = $this->message['diff'];
 173                 } else if( !$this->userCan($rc,Revision::DELETED_TEXT) ) {
 174                         $diffLink = $this->message['diff'];
 175                 } else {
 176                         $rcidparam = $unpatrolled ? array( 'rcid' => $rc->mAttribs['rc_id'] ) : array();
 177                         $diffLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['diff'],
 178                                 wfArrayToCGI( array(
 179                                         'curid' => $rc->mAttribs['rc_cur_id'],
 180                                         'diff'  => $rc->mAttribs['rc_this_oldid'],
 181                                         'oldid' => $rc->mAttribs['rc_last_oldid'] ),
 182                                         $rcidparam ),
 183                                 '', '', ' tabindex="'.$rc->counter.'"');
 184                 }
 185                 $s .= '('.$diffLink.') (';
 186                 # History link
 187                 $s .= $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['hist'],
 188                         wfArrayToCGI( array(
 189                                 'curid' => $rc->mAttribs['rc_cur_id'],
 190                                 'action' => 'history' ) ) );
 191                 $s .= ') . . ';
 192         }
 193
 194         protected function insertArticleLink( &$s, &$rc, $unpatrolled, $watched ) {
 195                 global $wgContLang;
 196                 # If it's a new article, there is no diff link, but if it hasn't been
 197                 # patrolled yet, we need to give users a way to do so
 198                 $params = ( $unpatrolled && $rc->mAttribs['rc_type'] == RC_NEW ) ?
 199                         'rcid='.$rc->mAttribs['rc_id'] : '';
 200                 if( $this->isDeleted($rc,Revision::DELETED_TEXT) ) {
 201                         $articlelink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '', $params );
 202                         $articlelink = '<span class="history-deleted">'.$articlelink.'</span>';
 203                 } else {
 204                     $articlelink = ' '. $this->skin->makeKnownLinkObj( $rc->getTitle(), '', $params );
 205                 }
 206                 # Bolden pages watched by this user
 207                 if( $watched ) {
 208                         $articlelink = "<strong class=\"mw-watched\">{$articlelink}</strong>";
 209                 }
 210                 # RTL/LTR marker
 211                 $articlelink .= $wgContLang->getDirMark();
 212
 213                 wfRunHooks( 'ChangesListInsertArticleLink',
 214                         array(&$this, &$articlelink, &$s, &$rc, $unpatrolled, $watched) );
 215
 216                 $s .= " $articlelink";
 217         }
 218
 219         protected function insertTimestamp( &$s, $rc ) {
 220                 global $wgLang;
 221                 $s .= $this->message['semicolon-separator'] .
 222                         $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                 if( $rc->mAttribs['rc_type'] == RC_LOG ) {
 238                         if( $this->isDeleted( $rc, LogPage::DELETED_ACTION ) ) {
 239                                 $s .= ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-event' ) . '</span>';
 240                         } else {
 241                                 $s .= ' '.LogPage::actionText( $rc->mAttribs['rc_log_type'], $rc->mAttribs['rc_log_action'],
 242                                         $rc->getTitle(), $this->skin, LogPage::extractParams( $rc->mAttribs['rc_params'] ), true, true );
 243                         }
 244                 }
 245         }
 246
 247         /** insert a formatted comment */
 248         protected function insertComment( &$s, &$rc ) {
 249                 if( $rc->mAttribs['rc_type'] != RC_MOVE && $rc->mAttribs['rc_type'] != RC_MOVE_OVER_REDIRECT ) {
 250                         if( $this->isDeleted( $rc, Revision::DELETED_COMMENT ) ) {
 251                                 $s .= ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-comment' ) . '</span>';
 252                         } else {
 253                                 $s .= $this->skin->commentBlock( $rc->mAttribs['rc_comment'], $rc->getTitle() );
 254                         }
 255                 }
 256         }
 257
 258         /**
 259          * Check whether to enable recent changes patrol features
 260          * @return bool
 261          */
 262         public static function usePatrol() {
 263                 global $wgUser;
 264                 return $wgUser->useRCPatrol();
 265         }
 266
 267         /**
 268          * Returns the string which indicates the number of watching users
 269          */
 270         protected function numberofWatchingusers( $count ) {
 271                 global $wgLang;
 272                 static $cache = array();
 273                 if( $count > 0 ) {
 274                         if( !isset( $cache[$count] ) ) {
 275                                 $cache[$count] = wfMsgExt( 'number_of_watching_users_RCview',
 276                                         array('parsemag', 'escape' ), $wgLang->formatNum( $count ) );
 277                         }
 278                         return $cache[$count];
 279                 } else {
 280                         return '';
 281                 }
 282         }
 283
 284         /**
 285          * Determine if said field of a revision is hidden
 286          * @param RCCacheEntry $rc
 287          * @param int $field one of DELETED_* bitfield constants
 288          * @return bool
 289          */
 290         public static function isDeleted( $rc, $field ) {
 291                 return ( $rc->mAttribs['rc_deleted'] & $field ) == $field;
 292         }
 293
 294         /**
 295          * Determine if the current user is allowed to view a particular
 296          * field of this revision, if it's marked as deleted.
 297          * @param RCCacheEntry $rc
 298          * @param int $field
 299          * @return bool
 300          */
 301         public static function userCan( $rc, $field ) {
 302                 if( ( $rc->mAttribs['rc_deleted'] & $field ) == $field ) {
 303                         global $wgUser;
 304                         $permission = ( $rc->mAttribs['rc_deleted'] & Revision::DELETED_RESTRICTED ) == Revision::DELETED_RESTRICTED
 305                                 ? 'suppressrevision'
 306                                 : 'deleterevision';
 307                         wfDebug( "Checking for $permission due to $field match on {$rc->mAttribs['rc_deleted']}\n" );
 308                         return $wgUser->isAllowed( $permission );
 309                 } else {
 310                         return true;
 311                 }
 312         }
 313
 314         protected function maybeWatchedLink( $link, $watched=false ) {
 315                 if( $watched ) {
 316                         return '<strong class="mw-watched">' . $link . '</strong>';
 317                 } else {
 318                         return '<span class="mw-rc-unwatched">' . $link . '</span>';
 319                 }
 320         }
 321
 322         /** Inserts a rollback link */
 323         protected function insertRollback( &$s, &$rc ) {
 324                 global $wgUser;
 325                 if( !$rc->mAttribs['rc_new'] && $rc->mAttribs['rc_this_oldid'] && $wgUser->isAllowed('rollback') ) {
 326                         $page = $rc->getTitle();
 327                         /** Check for rollback and edit permissions, disallow special pages, and only
 328                           * show a link on the top-most revision */
 329                         if( $rc->mAttribs['rc_cur_id'] > 0 && $page->userCan('rollback') && $page->userCan('edit')
 330                                 && $page->getLatestRevID() == $rc->mAttribs['rc_this_oldid'] )
 331                         {
 332                                 $rev = new Revision( array(
 333                                         'id'        => $rc->mAttribs['rc_this_oldid'],
 334                                         'user'      => $rc->mAttribs['rc_user'],
 335                                         'user_text' => $rc->mAttribs['rc_user_text']
 336                                 ) );
 337                                 $s .= ' '.$this->skin->generateRollback( $rev );
 338                         }
 339                 }
 340         }
 341 }
 342
 343
 344 /**
 345  * Generate a list of changes using the good old system (no javascript)
 346  */
 347 class OldChangesList extends ChangesList {
 348         /**
 349          * Format a line using the old system (aka without any javascript).
 350          */
 351         public function recentChangesLine( &$rc, $watched = false ) {
 352                 global $wgContLang, $wgLang, $wgRCShowChangedSize, $wgUser;
 353                 wfProfileIn( __METHOD__ );
 354                 # Should patrol-related stuff be shown?
 355                 $unpatrolled = $wgUser->useRCPatrol() && !$rc->mAttribs['rc_patrolled'];
 356
 357                 $dateheader = ''; // $s now contains only <li>...</li>, for hooks' convenience.
 358                 $this->insertDateHeader( $dateheader, $rc->mAttribs['rc_timestamp'] );
 359
 360                 $s = '';
 361                 // Moved pages
 362                 if( $rc->mAttribs['rc_type'] == RC_MOVE || $rc->mAttribs['rc_type'] == RC_MOVE_OVER_REDIRECT ) {
 363                         $this->insertMove( $s, $rc );
 364                 // Log entries
 365                 } elseif( $rc->mAttribs['rc_log_type'] ) {
 366                         $logtitle = Title::newFromText( 'Log/'.$rc->mAttribs['rc_log_type'], NS_SPECIAL );
 367                         $this->insertLog( $s, $logtitle, $rc->mAttribs['rc_log_type'] );
 368                 // Log entries (old format) or log targets, and special pages
 369                 } elseif( $rc->mAttribs['rc_namespace'] == NS_SPECIAL ) {
 370                         list( $name, $subpage ) = SpecialPage::resolveAliasWithSubpage( $rc->mAttribs['rc_title'] );
 371                         if( $name == 'Log' ) {
 372                                 $this->insertLog( $s, $rc->getTitle(), $subpage );
 373                         }
 374                 // Regular entries
 375                 } else {
 376                         $this->insertDiffHist( $s, $rc, $unpatrolled );
 377                         # M, N, b and ! (minor, new, bot and unpatrolled)
 378                         $s .= $this->recentChangesFlags( $rc->mAttribs['rc_new'], $rc->mAttribs['rc_minor'],
 379                                 $unpatrolled, '', $rc->mAttribs['rc_bot'] );
 380                         $this->insertArticleLink( $s, $rc, $unpatrolled, $watched );
 381                 }
 382                 # Edit/log timestamp
 383                 $this->insertTimestamp( $s, $rc );
 384                 # Bytes added or removed
 385                 if( $wgRCShowChangedSize ) {
 386                         $cd = $rc->getCharacterDifference();
 387                         if( $cd != '' ) {
 388                                 $s .= "$cd  . . ";
 389                         }
 390                 }
 391                 # User tool links
 392                 $this->insertUserRelatedLinks( $s, $rc );
 393                 # Log action text (if any)
 394                 $this->insertAction( $s, $rc );
 395                 # Edit or log comment
 396                 $this->insertComment( $s, $rc );
 397                 # Rollback
 398                 $this->insertRollback( $s, $rc );
 399                 # Mark revision as deleted if so
 400                 if( !$rc->mAttribs['rc_log_type'] && $this->isDeleted($rc,Revision::DELETED_TEXT) ) {
 401                    $s .= ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 402                 }
 403                 # How many users watch this page
 404                 if( $rc->numberofWatchingusers > 0 ) {
 405                         $s .= ' ' . wfMsgExt( 'number_of_watching_users_RCview',
 406                                 array( 'parsemag', 'escape' ), $wgLang->formatNum( $rc->numberofWatchingusers ) );
 407                 }
 408
 409                 wfRunHooks( 'OldChangesListRecentChangesLine', array(&$this, &$s, $rc) );
 410
 411                 wfProfileOut( __METHOD__ );
 412                 return "$dateheader<li>$s</li>\n";
 413         }
 414 }
 415
 416
 417 /**
 418  * Generate a list of changes using an Enhanced system (uses javascript).
 419  */
 420 class EnhancedChangesList extends ChangesList {
 421         /**
 422         *  Add the JavaScript file for enhanced changeslist
 423         *  @ return string
 424         */
 425         public function beginRecentChangesList() {
 426                 global $wgStylePath, $wgJsMimeType, $wgStyleVersion;
 427                 $this->rc_cache = array();
 428                 $this->rcMoveIndex = 0;
 429                 $this->rcCacheIndex = 0;
 430                 $this->lastdate = '';
 431                 $this->rclistOpen = false;
 432                 $script = Xml::tags( 'script', array(
 433                         'type' => $wgJsMimeType,
 434                         'src' => $wgStylePath . "/common/enhancedchanges.js?$wgStyleVersion" ), '' );
 435                 return $script;
 436         }
 437         /**
 438          * Format a line for enhanced recentchange (aka with javascript and block of lines).
 439          */
 440         public function recentChangesLine( &$baseRC, $watched = false ) {
 441                 global $wgLang, $wgContLang, $wgUser;
 442
 443                 # Create a specialised object
 444                 $rc = RCCacheEntry::newFromParent( $baseRC );
 445
 446                 # Extract fields from DB into the function scope (rc_xxxx variables)
 447                 // FIXME: Would be good to replace this extract() call with something
 448                 // that explicitly initializes variables.
 449                 extract( $rc->mAttribs );
 450                 $curIdEq = 'curid=' . $rc_cur_id;
 451
 452                 # If it's a new day, add the headline and flush the cache
 453                 $date = $wgLang->date( $rc_timestamp, true );
 454                 $ret = '';
 455                 if( $date != $this->lastdate ) {
 456                         # Process current cache
 457                         $ret = $this->recentChangesBlock();
 458                         $this->rc_cache = array();
 459                         $ret .= "<h4>{$date}</h4>\n";
 460                         $this->lastdate = $date;
 461                 }
 462
 463                 # Should patrol-related stuff be shown?
 464                 if( $wgUser->useRCPatrol() ) {
 465                         $rc->unpatrolled = !$rc_patrolled;
 466                 } else {
 467                         $rc->unpatrolled = false;
 468                 }
 469
 470                 $showdifflinks = true;
 471                 # Make article link
 472                 // Page moves
 473                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 474                         $msg = ( $rc_type == RC_MOVE ) ? "1movedto2" : "1movedto2_redir";
 475                         $clink = wfMsg( $msg, $this->skin->makeKnownLinkObj( $rc->getTitle(), '', 'redirect=no' ),
 476                           $this->skin->makeKnownLinkObj( $rc->getMovedToTitle(), '' ) );
 477                 // New unpatrolled pages
 478                 } else if( $rc->unpatrolled && $rc_type == RC_NEW ) {
 479                         $clink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '', "rcid={$rc_id}" );
 480                 // Log entries
 481                 } else if( $rc_type == RC_LOG ) {
 482                         if( $rc_log_type ) {
 483                                 $logtitle = SpecialPage::getTitleFor( 'Log', $rc_log_type );
 484                                 $clink = '(' . $this->skin->makeKnownLinkObj( $logtitle,
 485                                         LogPage::logName($rc_log_type) ) . ')';
 486                         } else {
 487                                 $clink = $this->skin->makeLinkObj( $rc->getTitle(), '' );
 488                         }
 489                         $watched = false;
 490                 // Log entries (old format) and special pages
 491                 } elseif( $rc_namespace == NS_SPECIAL ) {
 492                         list( $specialName, $logtype ) = SpecialPage::resolveAliasWithSubpage( $rc_title );
 493                         if ( $specialName == 'Log' ) {
 494                                 # Log updates, etc
 495                                 $logname = LogPage::logName( $logtype );
 496                                 $clink = '(' . $this->skin->makeKnownLinkObj( $rc->getTitle(), $logname ) . ')';
 497                         } else {
 498                                 wfDebug( "Unexpected special page in recentchanges\n" );
 499                                 $clink = '';
 500                         }
 501                 // Edits
 502                 } else {
 503                         $clink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '' );
 504                 }
 505
 506                 # Don't show unusable diff links
 507                 if ( !ChangesList::userCan($rc,Revision::DELETED_TEXT) ) {
 508                         $showdifflinks = false;
 509                 }
 510
 511                 $time = $wgContLang->time( $rc_timestamp, true, true );
 512                 $rc->watched = $watched;
 513                 $rc->link = $clink;
 514                 $rc->timestamp = $time;
 515                 $rc->numberofWatchingusers = $baseRC->numberofWatchingusers;
 516
 517                 # Make "cur" and "diff" links
 518                 if( $rc->unpatrolled ) {
 519                         $rcIdQuery = "&rcid={$rc_id}";
 520                 } else {
 521                         $rcIdQuery = '';
 522                 }
 523                 $querycur = $curIdEq."&diff=0&oldid=$rc_this_oldid";
 524                 $querydiff = $curIdEq."&diff=$rc_this_oldid&oldid=$rc_last_oldid$rcIdQuery";
 525                 $aprops = ' tabindex="'.$baseRC->counter.'"';
 526                 $curLink = $this->skin->makeKnownLinkObj( $rc->getTitle(),
 527                         $this->message['cur'], $querycur, '' ,'', $aprops );
 528
 529                 # Make "diff" an "cur" links
 530                 if( !$showdifflinks ) {
 531                    $curLink = $this->message['cur'];
 532                    $diffLink = $this->message['diff'];
 533                 } else if( in_array( $rc_type, array(RC_NEW,RC_LOG,RC_MOVE,RC_MOVE_OVER_REDIRECT) ) ) {
 534                         $curLink = ($rc_type != RC_NEW) ? $this->message['cur'] : $curLink;
 535                         $diffLink = $this->message['diff'];
 536                 } else {
 537                         $diffLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['diff'],
 538                                 $querydiff, '' ,'', $aprops );
 539                 }
 540
 541                 # Make "last" link
 542                 if( !$showdifflinks || !$rc_last_oldid ) {
 543                     $lastLink = $this->message['last'];
 544                 } else if( $rc_type == RC_LOG || $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 545                         $lastLink = $this->message['last'];
 546                 } else {
 547                         $lastLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['last'],
 548                         $curIdEq.'&diff='.$rc_this_oldid.'&oldid='.$rc_last_oldid . $rcIdQuery );
 549                 }
 550
 551                 # Make user links
 552                 if( $this->isDeleted($rc,Revision::DELETED_USER) ) {
 553                         $rc->userlink = ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 554                 } else {
 555                         $rc->userlink = $this->skin->userLink( $rc_user, $rc_user_text );
 556                         $rc->usertalklink = $this->skin->userToolLinks( $rc_user, $rc_user_text );
 557                 }
 558
 559                 $rc->lastlink = $lastLink;
 560                 $rc->curlink  = $curLink;
 561                 $rc->difflink = $diffLink;
 562
 563                 # Put accumulated information into the cache, for later display
 564                 # Page moves go on their own line
 565                 $title = $rc->getTitle();
 566                 $secureName = $title->getPrefixedDBkey();
 567                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 568                         # Use an @ character to prevent collision with page names
 569                         $this->rc_cache['@@' . ($this->rcMoveIndex++)] = array($rc);
 570                 } else {
 571                         # Logs are grouped by type
 572                         if( $rc_type == RC_LOG ){
 573                                 $secureName = SpecialPage::getTitleFor( 'Log', $rc_log_type )->getPrefixedDBkey();
 574                         }
 575                         if( !isset( $this->rc_cache[$secureName] ) ) {
 576                                 $this->rc_cache[$secureName] = array();
 577                         }
 578                         array_push( $this->rc_cache[$secureName], $rc );
 579                 }
 580                 return $ret;
 581         }
 582
 583         /**
 584          * Enhanced RC group
 585          */
 586         protected function recentChangesBlockGroup( $block ) {
 587                 global $wgLang, $wgContLang, $wgRCShowChangedSize;
 588                 $r = '<table cellpadding="0" cellspacing="0" border="0" style="background: none"><tr>';
 589
 590                 # Collate list of users
 591                 $userlinks = array();
 592                 # Other properties
 593                 $unpatrolled = false;
 594                 $isnew = false;
 595                 $curId = $currentRevision = 0;
 596                 # Some catalyst variables...
 597                 $namehidden = true;
 598                 $allLogs = true;
 599                 foreach( $block as $rcObj ) {
 600                         $oldid = $rcObj->mAttribs['rc_last_oldid'];
 601                         if( $rcObj->mAttribs['rc_new'] ) {
 602                                 $isnew = true;
 603                         }
 604                         // If all log actions to this page were hidden, then don't
 605                         // give the name of the affected page for this block!
 606                         if( !$this->isDeleted( $rcObj, LogPage::DELETED_ACTION ) ) {
 607                                 $namehidden = false;
 608                         }
 609                         $u = $rcObj->userlink;
 610                         if( !isset( $userlinks[$u] ) ) {
 611                                 $userlinks[$u] = 0;
 612                         }
 613                         if( $rcObj->unpatrolled ) {
 614                                 $unpatrolled = true;
 615                         }
 616                         if( $rcObj->mAttribs['rc_type'] != RC_LOG ) {
 617                                 $allLogs = false;
 618                         }
 619                         # Get the latest entry with a page_id and oldid
 620                         # since logs may not have these.
 621                         if( !$curId && $rcObj->mAttribs['rc_cur_id'] ) {
 622                                 $curId = $rcObj->mAttribs['rc_cur_id'];
 623                         }
 624                         if( !$currentRevision && $rcObj->mAttribs['rc_this_oldid'] ) {
 625                                 $currentRevision = $rcObj->mAttribs['rc_this_oldid'];
 626                         }
 627
 628                         $bot = $rcObj->mAttribs['rc_bot'];
 629                         $userlinks[$u]++;
 630                 }
 631
 632                 # Sort the list and convert to text
 633                 krsort( $userlinks );
 634                 asort( $userlinks );
 635                 $users = array();
 636                 foreach( $userlinks as $userlink => $count) {
 637                         $text = $userlink;
 638                         $text .= $wgContLang->getDirMark();
 639                         if( $count > 1 ) {
 640                                 $text .= ' (' . $wgLang->formatNum( $count ) . '×)';
 641                         }
 642                         array_push( $users, $text );
 643                 }
 644
 645                 $users = ' <span class="changedby">[' .
 646                         implode( $this->message['semicolon-separator'], $users ) . ']</span>';
 647
 648                 # ID for JS visibility toggle
 649                 $jsid = $this->rcCacheIndex;
 650                 # onclick handler to toggle hidden/expanded
 651                 $toggleLink = "onclick='toggleVisibility($jsid); return false'";
 652                 # Title for <a> tags
 653                 $expandTitle = htmlspecialchars( wfMsg( 'rc-enhanced-expand' ) );
 654                 $closeTitle = htmlspecialchars( wfMsg( 'rc-enhanced-hide' ) );
 655
 656                 $tl = "<span id='mw-rc-openarrow-$jsid' class='mw-changeslist-expanded' style='visibility:hidden'><a href='#' $toggleLink title='$expandTitle'>" . $this->sideArrow() . "</a></span>";
 657                 $tl .= "<span id='mw-rc-closearrow-$jsid' class='mw-changeslist-hidden' style='display:none'><a href='#' $toggleLink title='$closeTitle'>" . $this->downArrow() . "</a></span>";
 658                 $r .= '<td valign="top" style="white-space: nowrap"><tt>'.$tl.'&nbsp;';
 659
 660                 # Main line
 661                 $r .= $this->recentChangesFlags( $isnew, false, $unpatrolled, '&nbsp;', $bot );
 662
 663                 # Timestamp
 664                 $r .= '&nbsp;'.$block[0]->timestamp.'&nbsp;</tt></td><td>';
 665
 666                 # Article link
 667                 if( $namehidden ) {
 668                         $r .= ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-event' ) . '</span>';
 669                 } else if( $allLogs ) {
 670                         $r .= $this->maybeWatchedLink( $block[0]->link, $block[0]->watched );
 671                 } else {
 672                         $this->insertArticleLink( $r, $block[0], $block[0]->unpatrolled, $block[0]->watched );
 673                 }
 674
 675                 $r .= $wgContLang->getDirMark();
 676
 677                 $curIdEq = 'curid=' . $curId;
 678                 # Changes message
 679                 $n = count($block);
 680                 static $nchanges = array();
 681                 if ( !isset( $nchanges[$n] ) ) {
 682                         $nchanges[$n] = wfMsgExt( 'nchanges', array( 'parsemag', 'escape' ), $wgLang->formatNum( $n ) );
 683                 }
 684                 # Total change link
 685                 $r .= ' ';
 686                 if( !$allLogs ) {
 687                         $r .= '(';
 688                         if( !ChangesList::userCan( $rcObj, Revision::DELETED_TEXT ) ) {
 689                                 $r .= $nchanges[$n];
 690                         } else if( $isnew ) {
 691                                 $r .= $nchanges[$n];
 692                         } else {
 693                                 $r .= $this->skin->makeKnownLinkObj( $block[0]->getTitle(),
 694                                         $nchanges[$n], $curIdEq."&diff=$currentRevision&oldid=$oldid" );
 695                         }
 696                 }
 697
 698                 # History
 699                 if( $allLogs ) {
 700                         // don't show history link for logs
 701                 } else if( $namehidden || !$block[0]->getTitle()->exists() ) {
 702                         $r .= $this->message['semicolon-separator'] . $this->message['hist'] . ')';
 703                 } else {
 704                         $r .= $this->message['semicolon-separator'] . $this->skin->makeKnownLinkObj( $block[0]->getTitle(),
 705                                 $this->message['hist'], $curIdEq . '&action=history' ) . ')';
 706                 }
 707                 $r .= ' . . ';
 708
 709                 # Character difference (does not apply if only log items)
 710                 if( $wgRCShowChangedSize && !$allLogs ) {
 711                         $last = 0;
 712                         $first = count($block) - 1;
 713                         # Some events (like logs) have an "empty" size, so we need to skip those...
 714                         while( $last < $first && $block[$last]->mAttribs['rc_new_len'] === NULL ) {
 715                                 $last++;
 716                         }
 717                         while( $first > $last && $block[$first]->mAttribs['rc_old_len'] === NULL ) {
 718                                 $first--;
 719                         }
 720                         # Get net change
 721                         $chardiff = $rcObj->getCharacterDifference( $block[$first]->mAttribs['rc_old_len'],
 722                                 $block[$last]->mAttribs['rc_new_len'] );
 723
 724                         if( $chardiff == '' ) {
 725                                 $r .= ' ';
 726                         } else {
 727                                 $r .= ' ' . $chardiff. ' . . ';
 728                         }
 729                 }
 730
 731                 $r .= $users;
 732                 $r .= $this->numberofWatchingusers($block[0]->numberofWatchingusers);
 733
 734                 $r .= "</td></tr></table>\n";
 735
 736                 # Sub-entries
 737                 $r .= '<div id="mw-rc-subentries-'.$jsid.'" class="mw-changeslist-hidden">';
 738                 $r .= '<table cellpadding="0" cellspacing="0"  border="0" style="background: none">';
 739                 foreach( $block as $rcObj ) {
 740                         # Extract fields from DB into the function scope (rc_xxxx variables)
 741                         // FIXME: Would be good to replace this extract() call with something
 742                         // that explicitly initializes variables.
 743                         extract( $rcObj->mAttribs );
 744
 745                         #$r .= '<tr><td valign="top">'.$this->spacerArrow();
 746                         $r .= '<tr><td valign="top">';
 747                         $r .= '<tt>'.$this->spacerIndent() . $this->spacerIndent();
 748                         $r .= $this->recentChangesFlags( $rc_new, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot );
 749                         $r .= '&nbsp;</tt></td><td valign="top">';
 750
 751                         $o = '';
 752                         if( $rc_this_oldid != 0 ) {
 753                                 $o = 'oldid='.$rc_this_oldid;
 754                         }
 755                         # Log timestamp
 756                         if( $rc_type == RC_LOG ) {
 757                                 $link = '<tt>'.$rcObj->timestamp.'</tt> ';
 758                         # Revision link
 759                         } else if( !ChangesList::userCan($rcObj,Revision::DELETED_TEXT) ) {
 760                                 $link = '<span class="history-deleted"><tt>'.$rcObj->timestamp.'</tt></span> ';
 761                         } else {
 762                                 $rcIdEq = ($rcObj->unpatrolled && $rc_type == RC_NEW) ?
 763                                         '&rcid='.$rcObj->mAttribs['rc_id'] : '';
 764                                 $link = '<tt>'.$this->skin->makeKnownLinkObj( $rcObj->getTitle(),
 765                                         $rcObj->timestamp, $curIdEq.'&'.$o.$rcIdEq ).'</tt>';
 766                                 if( $this->isDeleted($rcObj,Revision::DELETED_TEXT) )
 767                                         $link = '<span class="history-deleted">'.$link.'</span> ';
 768                         }
 769                         $r .= $link;
 770
 771                         if ( !$rc_type == RC_LOG || $rc_type == RC_NEW ) {
 772                                 $r .= ' (';
 773                                 $r .= $rcObj->curlink;
 774                                 $r .= $this->message['semicolon-separator'];
 775                                 $r .= $rcObj->lastlink;
 776                                 $r .= ')';
 777                         }
 778                         $r .= ' . . ';
 779
 780                         # Character diff
 781                         if( $wgRCShowChangedSize ) {
 782                                 $r .= ( $rcObj->getCharacterDifference() == '' ? '' : $rcObj->getCharacterDifference() . ' . . ' ) ;
 783                         }
 784                         # User links
 785                         $r .= $rcObj->userlink;
 786                         $r .= $rcObj->usertalklink;
 787                         // log action
 788                         $this->insertAction( $r, $rcObj );
 789                         // log comment
 790                         $this->insertComment( $r, $rcObj );
 791                         # Rollback
 792                         $this->insertRollback( $r, $rcObj );
 793                         # Mark revision as deleted
 794                         if( !$rc_log_type && $this->isDeleted($rcObj,Revision::DELETED_TEXT) ) {
 795                                 $r .= ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 796                         }
 797
 798                         $r .= "</td></tr>\n";
 799                 }
 800                 $r .= "</table></div>\n";
 801
 802                 $this->rcCacheIndex++;
 803                 return $r;
 804         }
 805
 806         /**
 807          * Generate HTML for an arrow or placeholder graphic
 808          * @param string $dir one of '', 'd', 'l', 'r'
 809          * @param string $alt text
 810          * @param string $title text
 811          * @return string HTML <img> tag
 812          */
 813         protected function arrow( $dir, $alt='', $title='' ) {
 814                 global $wgStylePath;
 815                 $encUrl = htmlspecialchars( $wgStylePath . '/common/images/Arr_' . $dir . '.png' );
 816                 $encAlt = htmlspecialchars( $alt );
 817                 $encTitle = htmlspecialchars( $title );
 818                 return "<img src=\"$encUrl\" width=\"12\" height=\"12\" alt=\"$encAlt\" title=\"$encTitle\" />";
 819         }
 820
 821         /**
 822          * Generate HTML for a right- or left-facing arrow,
 823          * depending on language direction.
 824          * @return string HTML <img> tag
 825          */
 826         protected function sideArrow() {
 827                 global $wgContLang;
 828                 $dir = $wgContLang->isRTL() ? 'l' : 'r';
 829                 return $this->arrow( $dir, '+', wfMsg( 'rc-enhanced-expand' ) );
 830         }
 831
 832         /**
 833          * Generate HTML for a down-facing arrow
 834          * depending on language direction.
 835          * @return string HTML <img> tag
 836          */
 837         protected function downArrow() {
 838                 return $this->arrow( 'd', '-', wfMsg( 'rc-enhanced-hide' ) );
 839         }
 840
 841         /**
 842          * Generate HTML for a spacer image
 843          * @return string HTML <img> tag
 844          */
 845         protected function spacerArrow() {
 846                 return $this->arrow( '', codepointToUtf8( 0xa0 ) ); // non-breaking space
 847         }
 848
 849         /**
 850          * Add a set of spaces
 851          * @return string HTML <td> tag
 852          */
 853         protected function spacerIndent() {
 854                 return '&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;';
 855         }
 856
 857         /**
 858          * Enhanced RC ungrouped line.
 859          * @return string a HTML formated line (generated using $r)
 860          */
 861         protected function recentChangesBlockLine( $rcObj ) {
 862                 global $wgContLang, $wgRCShowChangedSize;
 863                 # Extract fields from DB into the function scope (rc_xxxx variables)
 864                 // FIXME: Would be good to replace this extract() call with something
 865                 // that explicitly initializes variables.
 866                 extract( $rcObj->mAttribs );
 867                 $curIdEq = "curid={$rc_cur_id}";
 868
 869                 $r = '<table cellspacing="0" cellpadding="0" border="0" style="background: none"><tr>';
 870                 $r .= '<td valign="top" style="white-space: nowrap"><tt>' . $this->spacerArrow() . '&nbsp;';
 871                 # Flag and Timestamp
 872                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 873                         $r .= '&nbsp;&nbsp;&nbsp;&nbsp;'; // 4 flags -> 4 spaces
 874                 } else {
 875                         $r .= $this->recentChangesFlags( $rc_type == RC_NEW, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot );
 876                 }
 877                 $r .= '&nbsp;'.$rcObj->timestamp.'&nbsp;</tt></td><td>';
 878                 # Article or log link
 879                 if( $rc_log_type ) {
 880                         $logtitle = Title::newFromText( "Log/$rc_log_type", NS_SPECIAL );
 881                         $logname = LogPage::logName( $rc_log_type );
 882                         $r .= '(' . $this->skin->makeKnownLinkObj($logtitle, $logname ) . ')';
 883                 } else {
 884                         $this->insertArticleLink( $r, $rcObj, $rcObj->unpatrolled, $rcObj->watched );
 885                 }
 886                 # Diff and hist links
 887                 if ( $rc_type != RC_LOG ) {
 888                         $r .= ' ('. $rcObj->difflink . $this->message['semicolon-separator'];
 889                         $r .= $this->skin->makeKnownLinkObj( $rcObj->getTitle(), $this->message['hist'],
 890                                 $curIdEq.'&action=history' ) . ')';
 891                 }
 892                 $r .= ' . . ';
 893                 # Character diff
 894                 if( $wgRCShowChangedSize && ($cd = $rcObj->getCharacterDifference()) ) {
 895                         $r .= "$cd . . ";
 896                 }
 897                 # User/talk
 898                 $r .= ' '.$rcObj->userlink . $rcObj->usertalklink;
 899                 # Log action (if any)
 900                 if( $rc_log_type ) {
 901                         if( $this->isDeleted($rcObj,LogPage::DELETED_ACTION) ) {
 902                                 $r .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 903                         } else {
 904                                 $r .= ' ' . LogPage::actionText( $rc_log_type, $rc_log_action, $rcObj->getTitle(),
 905                                         $this->skin, LogPage::extractParams($rc_params), true, true );
 906                         }
 907                 }
 908                 $this->insertComment( $r, $rcObj );
 909                 $this->insertRollback( $r, $rcObj );
 910                 # Show how many people are watching this if enabled
 911                 $r .= $this->numberofWatchingusers($rcObj->numberofWatchingusers);
 912
 913                 $r .= "</td></tr></table>\n";
 914                 return $r;
 915         }
 916
 917         /**
 918          * If enhanced RC is in use, this function takes the previously cached
 919          * RC lines, arranges them, and outputs the HTML
 920          */
 921         protected function recentChangesBlock() {
 922                 if( count ( $this->rc_cache ) == 0 ) {
 923                         return '';
 924                 }
 925                 $blockOut = '';
 926                 foreach( $this->rc_cache as $block ) {
 927                         if( count( $block ) < 2 ) {
 928                                 $blockOut .= $this->recentChangesBlockLine( array_shift( $block ) );
 929                         } else {
 930                                 $blockOut .= $this->recentChangesBlockGroup( $block );
 931                         }
 932                 }
 933                 return '<div>'.$blockOut.'</div>';
 934         }
 935
 936         /**
 937          * Returns text for the end of RC
 938          * If enhanced RC is in use, returns pretty much all the text
 939          */
 940         public function endRecentChangesList() {
 941                 return $this->recentChangesBlock() . parent::endRecentChangesList();
 942         }
 943
 944 }