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'] && $rc->mAttribs['rc_cur_id'] ) {
 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( $page->quickUserCan('rollback') && $page->quickUserCan('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                                         'deleted'   => $rc->mAttribs['rc_deleted']
 337                                 ) );
 338                                 $rev->setTitle( $page );
 339                                 $s .= ' '.$this->skin->generateRollback( $rev );
 340                         }
 341                 }
 342         }
 343
 344         protected function insertTags( &$s, &$rc, &$classes ) {
 345                 if ( empty($rc->mAttribs['ts_tags']) )
 346                         return;
 347
 348                 list($tagSummary, $newClasses) = ChangeTags::formatSummaryRow( $rc->mAttribs['ts_tags'], 'changeslist' );
 349                 $classes = array_merge( $classes, $newClasses );
 350                 $s .= ' ' . $tagSummary;
 351         }
 352
 353         protected function insertExtra( &$s, &$rc, &$classes ) {
 354                 ## Empty, used for subclassers to add anything special.
 355         }
 356 }
 357
 358
 359 /**
 360  * Generate a list of changes using the good old system (no javascript)
 361  */
 362 class OldChangesList extends ChangesList {
 363         /**
 364          * Format a line using the old system (aka without any javascript).
 365          */
 366         public function recentChangesLine( &$rc, $watched = false, $linenumber = NULL ) {
 367                 global $wgContLang, $wgLang, $wgRCShowChangedSize, $wgUser;
 368                 wfProfileIn( __METHOD__ );
 369                 # Should patrol-related stuff be shown?
 370                 $unpatrolled = $wgUser->useRCPatrol() && !$rc->mAttribs['rc_patrolled'];
 371
 372                 $dateheader = ''; // $s now contains only <li>...</li>, for hooks' convenience.
 373                 $this->insertDateHeader( $dateheader, $rc->mAttribs['rc_timestamp'] );
 374
 375                 $s = '';
 376                 $classes = array();
 377                 // use mw-line-even/mw-line-odd class only if linenumber is given (feature from bug 14468)
 378                 if( $linenumber ) {
 379                         if( $linenumber & 1 ) {
 380                                 $classes[] = 'mw-line-odd';
 381                         }
 382                         else {
 383                                 $classes[] = 'mw-line-even';
 384                         }
 385                 }
 386
 387                 // Moved pages
 388                 if( $rc->mAttribs['rc_type'] == RC_MOVE || $rc->mAttribs['rc_type'] == RC_MOVE_OVER_REDIRECT ) {
 389                         $this->insertMove( $s, $rc );
 390                 // Log entries
 391                 } elseif( $rc->mAttribs['rc_log_type'] ) {
 392                         $logtitle = Title::newFromText( 'Log/'.$rc->mAttribs['rc_log_type'], NS_SPECIAL );
 393                         $this->insertLog( $s, $logtitle, $rc->mAttribs['rc_log_type'] );
 394                 // Log entries (old format) or log targets, and special pages
 395                 } elseif( $rc->mAttribs['rc_namespace'] == NS_SPECIAL ) {
 396                         list( $name, $subpage ) = SpecialPage::resolveAliasWithSubpage( $rc->mAttribs['rc_title'] );
 397                         if( $name == 'Log' ) {
 398                                 $this->insertLog( $s, $rc->getTitle(), $subpage );
 399                         }
 400                 // Regular entries
 401                 } else {
 402                         $this->insertDiffHist( $s, $rc, $unpatrolled );
 403                         # M, N, b and ! (minor, new, bot and unpatrolled)
 404                         $s .= $this->recentChangesFlags( $rc->mAttribs['rc_new'], $rc->mAttribs['rc_minor'],
 405                                 $unpatrolled, '', $rc->mAttribs['rc_bot'] );
 406                         $this->insertArticleLink( $s, $rc, $unpatrolled, $watched );
 407                 }
 408                 # Edit/log timestamp
 409                 $this->insertTimestamp( $s, $rc );
 410                 # Bytes added or removed
 411                 if( $wgRCShowChangedSize ) {
 412                         $cd = $rc->getCharacterDifference();
 413                         if( $cd != '' ) {
 414                                 $s .= "$cd  . . ";
 415                         }
 416                 }
 417                 # User tool links
 418                 $this->insertUserRelatedLinks( $s, $rc );
 419                 # Log action text (if any)
 420                 $this->insertAction( $s, $rc );
 421                 # Edit or log comment
 422                 $this->insertComment( $s, $rc );
 423                 # Tags
 424                 $this->insertTags( $s, $rc, $classes );
 425                 # Rollback
 426                 $this->insertRollback( $s, $rc );
 427                 # For subclasses
 428                 $this->insertExtra( $s, $rc, $classes );
 429
 430                 # Mark revision as deleted if so
 431                 if( !$rc->mAttribs['rc_log_type'] && $this->isDeleted($rc,Revision::DELETED_TEXT) ) {
 432                    $s .= ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 433                 }
 434                 # How many users watch this page
 435                 if( $rc->numberofWatchingusers > 0 ) {
 436                         $s .= ' ' . wfMsgExt( 'number_of_watching_users_RCview',
 437                                 array( 'parsemag', 'escape' ), $wgLang->formatNum( $rc->numberofWatchingusers ) );
 438                 }
 439
 440                 wfRunHooks( 'OldChangesListRecentChangesLine', array(&$this, &$s, $rc) );
 441
 442                 wfProfileOut( __METHOD__ );
 443                 return "$dateheader<li class=\"".implode( ' ', $classes )."\">$s</li>\n";
 444         }
 445 }
 446
 447
 448 /**
 449  * Generate a list of changes using an Enhanced system (uses javascript).
 450  */
 451 class EnhancedChangesList extends ChangesList {
 452         /**
 453         *  Add the JavaScript file for enhanced changeslist
 454         *  @ return string
 455         */
 456         public function beginRecentChangesList() {
 457                 global $wgStylePath, $wgJsMimeType, $wgStyleVersion;
 458                 $this->rc_cache = array();
 459                 $this->rcMoveIndex = 0;
 460                 $this->rcCacheIndex = 0;
 461                 $this->lastdate = '';
 462                 $this->rclistOpen = false;
 463                 $script = Xml::tags( 'script', array(
 464                         'type' => $wgJsMimeType,
 465                         'src' => $wgStylePath . "/common/enhancedchanges.js?$wgStyleVersion" ), '' );
 466                 return $script;
 467         }
 468         /**
 469          * Format a line for enhanced recentchange (aka with javascript and block of lines).
 470          */
 471         public function recentChangesLine( &$baseRC, $watched = false ) {
 472                 global $wgLang, $wgContLang, $wgUser;
 473
 474                 wfProfileIn( __METHOD__ );
 475
 476                 # Create a specialised object
 477                 $rc = RCCacheEntry::newFromParent( $baseRC );
 478
 479                 # Extract fields from DB into the function scope (rc_xxxx variables)
 480                 // FIXME: Would be good to replace this extract() call with something
 481                 // that explicitly initializes variables.
 482                 extract( $rc->mAttribs );
 483                 $curIdEq = 'curid=' . $rc_cur_id;
 484
 485                 # If it's a new day, add the headline and flush the cache
 486                 $date = $wgLang->date( $rc_timestamp, true );
 487                 $ret = '';
 488                 if( $date != $this->lastdate ) {
 489                         # Process current cache
 490                         $ret = $this->recentChangesBlock();
 491                         $this->rc_cache = array();
 492                         $ret .= "<h4>{$date}</h4>\n";
 493                         $this->lastdate = $date;
 494                 }
 495
 496                 # Should patrol-related stuff be shown?
 497                 if( $wgUser->useRCPatrol() ) {
 498                         $rc->unpatrolled = !$rc_patrolled;
 499                 } else {
 500                         $rc->unpatrolled = false;
 501                 }
 502
 503                 $showdifflinks = true;
 504                 # Make article link
 505                 // Page moves
 506                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 507                         $msg = ( $rc_type == RC_MOVE ) ? "1movedto2" : "1movedto2_redir";
 508                         $clink = wfMsg( $msg, $this->skin->makeKnownLinkObj( $rc->getTitle(), '', 'redirect=no' ),
 509                           $this->skin->makeKnownLinkObj( $rc->getMovedToTitle(), '' ) );
 510                 // New unpatrolled pages
 511                 } else if( $rc->unpatrolled && $rc_type == RC_NEW ) {
 512                         $clink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '', "rcid={$rc_id}" );
 513                 // Log entries
 514                 } else if( $rc_type == RC_LOG ) {
 515                         if( $rc_log_type ) {
 516                                 $logtitle = SpecialPage::getTitleFor( 'Log', $rc_log_type );
 517                                 $clink = '(' . $this->skin->makeKnownLinkObj( $logtitle,
 518                                         LogPage::logName($rc_log_type) ) . ')';
 519                         } else {
 520                                 $clink = $this->skin->makeLinkObj( $rc->getTitle(), '' );
 521                         }
 522                         $watched = false;
 523                 // Log entries (old format) and special pages
 524                 } elseif( $rc_namespace == NS_SPECIAL ) {
 525                         list( $specialName, $logtype ) = SpecialPage::resolveAliasWithSubpage( $rc_title );
 526                         if ( $specialName == 'Log' ) {
 527                                 # Log updates, etc
 528                                 $logname = LogPage::logName( $logtype );
 529                                 $clink = '(' . $this->skin->makeKnownLinkObj( $rc->getTitle(), $logname ) . ')';
 530                         } else {
 531                                 wfDebug( "Unexpected special page in recentchanges\n" );
 532                                 $clink = '';
 533                         }
 534                 // Edits
 535                 } else {
 536                         $clink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '' );
 537                 }
 538
 539                 # Don't show unusable diff links
 540                 if ( !ChangesList::userCan($rc,Revision::DELETED_TEXT) ) {
 541                         $showdifflinks = false;
 542                 }
 543
 544                 $time = $wgContLang->time( $rc_timestamp, true, true );
 545                 $rc->watched = $watched;
 546                 $rc->link = $clink;
 547                 $rc->timestamp = $time;
 548                 $rc->numberofWatchingusers = $baseRC->numberofWatchingusers;
 549
 550                 # Make "cur" and "diff" links
 551                 if( $rc->unpatrolled ) {
 552                         $rcIdQuery = "&rcid={$rc_id}";
 553                 } else {
 554                         $rcIdQuery = '';
 555                 }
 556                 $querycur = $curIdEq."&diff=0&oldid=$rc_this_oldid";
 557                 $querydiff = $curIdEq."&diff=$rc_this_oldid&oldid=$rc_last_oldid$rcIdQuery";
 558                 $aprops = ' tabindex="'.$baseRC->counter.'"';
 559                 $curLink = $this->skin->makeKnownLinkObj( $rc->getTitle(),
 560                         $this->message['cur'], $querycur, '' ,'', $aprops );
 561
 562                 # Make "diff" an "cur" links
 563                 if( !$showdifflinks ) {
 564                    $curLink = $this->message['cur'];
 565                    $diffLink = $this->message['diff'];
 566                 } else if( in_array( $rc_type, array(RC_NEW,RC_LOG,RC_MOVE,RC_MOVE_OVER_REDIRECT) ) ) {
 567                         $curLink = ($rc_type != RC_NEW) ? $this->message['cur'] : $curLink;
 568                         $diffLink = $this->message['diff'];
 569                 } else {
 570                         $diffLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['diff'],
 571                                 $querydiff, '' ,'', $aprops );
 572                 }
 573
 574                 # Make "last" link
 575                 if( !$showdifflinks || !$rc_last_oldid ) {
 576                     $lastLink = $this->message['last'];
 577                 } else if( $rc_type == RC_LOG || $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 578                         $lastLink = $this->message['last'];
 579                 } else {
 580                         $lastLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['last'],
 581                         $curIdEq.'&diff='.$rc_this_oldid.'&oldid='.$rc_last_oldid . $rcIdQuery );
 582                 }
 583
 584                 # Make user links
 585                 if( $this->isDeleted($rc,Revision::DELETED_USER) ) {
 586                         $rc->userlink = ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 587                 } else {
 588                         $rc->userlink = $this->skin->userLink( $rc_user, $rc_user_text );
 589                         $rc->usertalklink = $this->skin->userToolLinks( $rc_user, $rc_user_text );
 590                 }
 591
 592                 $rc->lastlink = $lastLink;
 593                 $rc->curlink  = $curLink;
 594                 $rc->difflink = $diffLink;
 595
 596                 # Put accumulated information into the cache, for later display
 597                 # Page moves go on their own line
 598                 $title = $rc->getTitle();
 599                 $secureName = $title->getPrefixedDBkey();
 600                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 601                         # Use an @ character to prevent collision with page names
 602                         $this->rc_cache['@@' . ($this->rcMoveIndex++)] = array($rc);
 603                 } else {
 604                         # Logs are grouped by type
 605                         if( $rc_type == RC_LOG ){
 606                                 $secureName = SpecialPage::getTitleFor( 'Log', $rc_log_type )->getPrefixedDBkey();
 607                         }
 608                         if( !isset( $this->rc_cache[$secureName] ) ) {
 609                                 $this->rc_cache[$secureName] = array();
 610                         }
 611
 612                         array_push( $this->rc_cache[$secureName], $rc );
 613                 }
 614
 615                 wfProfileOut( __METHOD__ );
 616
 617                 return $ret;
 618         }
 619
 620         /**
 621          * Enhanced RC group
 622          */
 623         protected function recentChangesBlockGroup( $block ) {
 624                 global $wgLang, $wgContLang, $wgRCShowChangedSize;
 625
 626                 wfProfileIn( __METHOD__ );
 627
 628                 $r = '<table cellpadding="0" cellspacing="0" border="0" style="background: none"><tr>';
 629
 630                 # Collate list of users
 631                 $userlinks = array();
 632                 # Other properties
 633                 $unpatrolled = false;
 634                 $isnew = false;
 635                 $curId = $currentRevision = 0;
 636                 # Some catalyst variables...
 637                 $namehidden = true;
 638                 $allLogs = true;
 639                 foreach( $block as $rcObj ) {
 640                         $oldid = $rcObj->mAttribs['rc_last_oldid'];
 641                         if( $rcObj->mAttribs['rc_new'] ) {
 642                                 $isnew = true;
 643                         }
 644                         // If all log actions to this page were hidden, then don't
 645                         // give the name of the affected page for this block!
 646                         if( !$this->isDeleted( $rcObj, LogPage::DELETED_ACTION ) ) {
 647                                 $namehidden = false;
 648                         }
 649                         $u = $rcObj->userlink;
 650                         if( !isset( $userlinks[$u] ) ) {
 651                                 $userlinks[$u] = 0;
 652                         }
 653                         if( $rcObj->unpatrolled ) {
 654                                 $unpatrolled = true;
 655                         }
 656                         if( $rcObj->mAttribs['rc_type'] != RC_LOG ) {
 657                                 $allLogs = false;
 658                         }
 659                         # Get the latest entry with a page_id and oldid
 660                         # since logs may not have these.
 661                         if( !$curId && $rcObj->mAttribs['rc_cur_id'] ) {
 662                                 $curId = $rcObj->mAttribs['rc_cur_id'];
 663                         }
 664                         if( !$currentRevision && $rcObj->mAttribs['rc_this_oldid'] ) {
 665                                 $currentRevision = $rcObj->mAttribs['rc_this_oldid'];
 666                         }
 667
 668                         $bot = $rcObj->mAttribs['rc_bot'];
 669                         $userlinks[$u]++;
 670                 }
 671
 672                 # Sort the list and convert to text
 673                 krsort( $userlinks );
 674                 asort( $userlinks );
 675                 $users = array();
 676                 foreach( $userlinks as $userlink => $count) {
 677                         $text = $userlink;
 678                         $text .= $wgContLang->getDirMark();
 679                         if( $count > 1 ) {
 680                                 $text .= ' (' . $wgLang->formatNum( $count ) . '×)';
 681                         }
 682                         array_push( $users, $text );
 683                 }
 684
 685                 $users = ' <span class="changedby">[' .
 686                         implode( $this->message['semicolon-separator'], $users ) . ']</span>';
 687
 688                 # ID for JS visibility toggle
 689                 $jsid = $this->rcCacheIndex;
 690                 # onclick handler to toggle hidden/expanded
 691                 $toggleLink = "onclick='toggleVisibility($jsid); return false'";
 692                 # Title for <a> tags
 693                 $expandTitle = htmlspecialchars( wfMsg( 'rc-enhanced-expand' ) );
 694                 $closeTitle = htmlspecialchars( wfMsg( 'rc-enhanced-hide' ) );
 695
 696                 $tl = "<span id='mw-rc-openarrow-$jsid' class='mw-changeslist-expanded' style='visibility:hidden'><a href='#' $toggleLink title='$expandTitle'>" . $this->sideArrow() . "</a></span>";
 697                 $tl .= "<span id='mw-rc-closearrow-$jsid' class='mw-changeslist-hidden' style='display:none'><a href='#' $toggleLink title='$closeTitle'>" . $this->downArrow() . "</a></span>";
 698                 $r .= '<td valign="top" style="white-space: nowrap"><tt>'.$tl.'&nbsp;';
 699
 700                 # Main line
 701                 $r .= $this->recentChangesFlags( $isnew, false, $unpatrolled, '&nbsp;', $bot );
 702
 703                 # Timestamp
 704                 $r .= '&nbsp;'.$block[0]->timestamp.'&nbsp;</tt></td><td>';
 705
 706                 # Article link
 707                 if( $namehidden ) {
 708                         $r .= ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-event' ) . '</span>';
 709                 } else if( $allLogs ) {
 710                         $r .= $this->maybeWatchedLink( $block[0]->link, $block[0]->watched );
 711                 } else {
 712                         $this->insertArticleLink( $r, $block[0], $block[0]->unpatrolled, $block[0]->watched );
 713                 }
 714
 715                 $r .= $wgContLang->getDirMark();
 716
 717                 $curIdEq = 'curid=' . $curId;
 718                 # Changes message
 719                 $n = count($block);
 720                 static $nchanges = array();
 721                 if ( !isset( $nchanges[$n] ) ) {
 722                         $nchanges[$n] = wfMsgExt( 'nchanges', array( 'parsemag', 'escape' ), $wgLang->formatNum( $n ) );
 723                 }
 724                 # Total change link
 725                 $r .= ' ';
 726                 if( !$allLogs ) {
 727                         $r .= '(';
 728                         if( !ChangesList::userCan( $rcObj, Revision::DELETED_TEXT ) ) {
 729                                 $r .= $nchanges[$n];
 730                         } else if( $isnew ) {
 731                                 $r .= $nchanges[$n];
 732                         } else {
 733                                 $r .= $this->skin->makeKnownLinkObj( $block[0]->getTitle(),
 734                                         $nchanges[$n], $curIdEq."&diff=$currentRevision&oldid=$oldid" );
 735                         }
 736                 }
 737
 738                 # History
 739                 if( $allLogs ) {
 740                         // don't show history link for logs
 741                 } else if( $namehidden || !$block[0]->getTitle()->exists() ) {
 742                         $r .= $this->message['semicolon-separator'] . $this->message['hist'] . ')';
 743                 } else {
 744                         $r .= $this->message['semicolon-separator'] . $this->skin->makeKnownLinkObj( $block[0]->getTitle(),
 745                                 $this->message['hist'], $curIdEq . '&action=history' ) . ')';
 746                 }
 747                 $r .= ' . . ';
 748
 749                 # Character difference (does not apply if only log items)
 750                 if( $wgRCShowChangedSize && !$allLogs ) {
 751                         $last = 0;
 752                         $first = count($block) - 1;
 753                         # Some events (like logs) have an "empty" size, so we need to skip those...
 754                         while( $last < $first && $block[$last]->mAttribs['rc_new_len'] === NULL ) {
 755                                 $last++;
 756                         }
 757                         while( $first > $last && $block[$first]->mAttribs['rc_old_len'] === NULL ) {
 758                                 $first--;
 759                         }
 760                         # Get net change
 761                         $chardiff = $rcObj->getCharacterDifference( $block[$first]->mAttribs['rc_old_len'],
 762                                 $block[$last]->mAttribs['rc_new_len'] );
 763
 764                         if( $chardiff == '' ) {
 765                                 $r .= ' ';
 766                         } else {
 767                                 $r .= ' ' . $chardiff. ' . . ';
 768                         }
 769                 }
 770
 771                 $r .= $users;
 772                 $r .= $this->numberofWatchingusers($block[0]->numberofWatchingusers);
 773
 774                 $r .= "</td></tr></table>\n";
 775
 776                 # Sub-entries
 777                 $r .= '<div id="mw-rc-subentries-'.$jsid.'" class="mw-changeslist-hidden">';
 778                 $r .= '<table cellpadding="0" cellspacing="0"  border="0" style="background: none">';
 779                 foreach( $block as $rcObj ) {
 780                         # Extract fields from DB into the function scope (rc_xxxx variables)
 781                         // FIXME: Would be good to replace this extract() call with something
 782                         // that explicitly initializes variables.
 783                         # Classes to apply -- TODO implement
 784                         $classes = array();
 785                         extract( $rcObj->mAttribs );
 786
 787                         #$r .= '<tr><td valign="top">'.$this->spacerArrow();
 788                         $r .= '<tr><td valign="top">';
 789                         $r .= '<tt>'.$this->spacerIndent() . $this->spacerIndent();
 790                         $r .= $this->recentChangesFlags( $rc_new, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot );
 791                         $r .= '&nbsp;</tt></td><td valign="top">';
 792
 793                         $o = '';
 794                         if( $rc_this_oldid != 0 ) {
 795                                 $o = 'oldid='.$rc_this_oldid;
 796                         }
 797                         # Log timestamp
 798                         if( $rc_type == RC_LOG ) {
 799                                 $link = '<tt>'.$rcObj->timestamp.'</tt> ';
 800                         # Revision link
 801                         } else if( !ChangesList::userCan($rcObj,Revision::DELETED_TEXT) ) {
 802                                 $link = '<span class="history-deleted"><tt>'.$rcObj->timestamp.'</tt></span> ';
 803                         } else {
 804                                 $rcIdEq = ($rcObj->unpatrolled && $rc_type == RC_NEW) ?
 805                                         '&rcid='.$rcObj->mAttribs['rc_id'] : '';
 806                                 $link = '<tt>'.$this->skin->makeKnownLinkObj( $rcObj->getTitle(),
 807                                         $rcObj->timestamp, $curIdEq.'&'.$o.$rcIdEq ).'</tt>';
 808                                 if( $this->isDeleted($rcObj,Revision::DELETED_TEXT) )
 809                                         $link = '<span class="history-deleted">'.$link.'</span> ';
 810                         }
 811                         $r .= $link;
 812
 813                         if ( !$rc_type == RC_LOG || $rc_type == RC_NEW ) {
 814                                 $r .= ' (';
 815                                 $r .= $rcObj->curlink;
 816                                 $r .= $this->message['semicolon-separator'];
 817                                 $r .= $rcObj->lastlink;
 818                                 $r .= ')';
 819                         }
 820                         $r .= ' . . ';
 821
 822                         # Character diff
 823                         if( $wgRCShowChangedSize ) {
 824                                 $r .= ( $rcObj->getCharacterDifference() == '' ? '' : $rcObj->getCharacterDifference() . ' . . ' ) ;
 825                         }
 826                         # User links
 827                         $r .= $rcObj->userlink;
 828                         $r .= $rcObj->usertalklink;
 829                         // log action
 830                         $this->insertAction( $r, $rcObj );
 831                         // log comment
 832                         $this->insertComment( $r, $rcObj );
 833                         # Rollback
 834                         $this->insertRollback( $r, $rcObj );
 835                         # Tags
 836                         $this->insertTags( $r, $rcObj, $classes );
 837
 838                         # Mark revision as deleted
 839                         if( !$rc_log_type && $this->isDeleted($rcObj,Revision::DELETED_TEXT) ) {
 840                                 $r .= ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 841                         }
 842
 843                         $r .= "</td></tr>\n";
 844                 }
 845                 $r .= "</table></div>\n";
 846
 847                 $this->rcCacheIndex++;
 848
 849                 wfProfileOut( __METHOD__ );
 850
 851                 return $r;
 852         }
 853
 854         /**
 855          * Generate HTML for an arrow or placeholder graphic
 856          * @param string $dir one of '', 'd', 'l', 'r'
 857          * @param string $alt text
 858          * @param string $title text
 859          * @return string HTML <img> tag
 860          */
 861         protected function arrow( $dir, $alt='', $title='' ) {
 862                 global $wgStylePath;
 863                 $encUrl = htmlspecialchars( $wgStylePath . '/common/images/Arr_' . $dir . '.png' );
 864                 $encAlt = htmlspecialchars( $alt );
 865                 $encTitle = htmlspecialchars( $title );
 866                 return "<img src=\"$encUrl\" width=\"12\" height=\"12\" alt=\"$encAlt\" title=\"$encTitle\" />";
 867         }
 868
 869         /**
 870          * Generate HTML for a right- or left-facing arrow,
 871          * depending on language direction.
 872          * @return string HTML <img> tag
 873          */
 874         protected function sideArrow() {
 875                 global $wgContLang;
 876                 $dir = $wgContLang->isRTL() ? 'l' : 'r';
 877                 return $this->arrow( $dir, '+', wfMsg( 'rc-enhanced-expand' ) );
 878         }
 879
 880         /**
 881          * Generate HTML for a down-facing arrow
 882          * depending on language direction.
 883          * @return string HTML <img> tag
 884          */
 885         protected function downArrow() {
 886                 return $this->arrow( 'd', '-', wfMsg( 'rc-enhanced-hide' ) );
 887         }
 888
 889         /**
 890          * Generate HTML for a spacer image
 891          * @return string HTML <img> tag
 892          */
 893         protected function spacerArrow() {
 894                 return $this->arrow( '', codepointToUtf8( 0xa0 ) ); // non-breaking space
 895         }
 896
 897         /**
 898          * Add a set of spaces
 899          * @return string HTML <td> tag
 900          */
 901         protected function spacerIndent() {
 902                 return '&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;';
 903         }
 904
 905         /**
 906          * Enhanced RC ungrouped line.
 907          * @return string a HTML formated line (generated using $r)
 908          */
 909         protected function recentChangesBlockLine( $rcObj ) {
 910                 global $wgContLang, $wgRCShowChangedSize;
 911
 912                 wfProfileIn( __METHOD__ );
 913
 914                 # Extract fields from DB into the function scope (rc_xxxx variables)
 915                 // FIXME: Would be good to replace this extract() call with something
 916                 // that explicitly initializes variables.
 917                 $classes = array(); // TODO implement
 918                 extract( $rcObj->mAttribs );
 919                 $curIdEq = "curid={$rc_cur_id}";
 920
 921                 $r = '<table cellspacing="0" cellpadding="0" border="0" style="background: none"><tr>';
 922                 $r .= '<td valign="top" style="white-space: nowrap"><tt>' . $this->spacerArrow() . '&nbsp;';
 923                 # Flag and Timestamp
 924                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 925                         $r .= '&nbsp;&nbsp;&nbsp;&nbsp;'; // 4 flags -> 4 spaces
 926                 } else {
 927                         $r .= $this->recentChangesFlags( $rc_type == RC_NEW, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot );
 928                 }
 929                 $r .= '&nbsp;'.$rcObj->timestamp.'&nbsp;</tt></td><td>';
 930                 # Article or log link
 931                 if( $rc_log_type ) {
 932                         $logtitle = Title::newFromText( "Log/$rc_log_type", NS_SPECIAL );
 933                         $logname = LogPage::logName( $rc_log_type );
 934                         $r .= '(' . $this->skin->makeKnownLinkObj($logtitle, $logname ) . ')';
 935                 } else {
 936                         $this->insertArticleLink( $r, $rcObj, $rcObj->unpatrolled, $rcObj->watched );
 937                 }
 938                 # Diff and hist links
 939                 if ( $rc_type != RC_LOG ) {
 940                         $r .= ' ('. $rcObj->difflink . $this->message['semicolon-separator'];
 941                         $r .= $this->skin->makeKnownLinkObj( $rcObj->getTitle(), $this->message['hist'],
 942                                 $curIdEq.'&action=history' ) . ')';
 943                 }
 944                 $r .= ' . . ';
 945                 # Character diff
 946                 if( $wgRCShowChangedSize && ($cd = $rcObj->getCharacterDifference()) ) {
 947                         $r .= "$cd . . ";
 948                 }
 949                 # User/talk
 950                 $r .= ' '.$rcObj->userlink . $rcObj->usertalklink;
 951                 # Log action (if any)
 952                 if( $rc_log_type ) {
 953                         if( $this->isDeleted($rcObj,LogPage::DELETED_ACTION) ) {
 954                                 $r .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 955                         } else {
 956                                 $r .= ' ' . LogPage::actionText( $rc_log_type, $rc_log_action, $rcObj->getTitle(),
 957                                         $this->skin, LogPage::extractParams($rc_params), true, true );
 958                         }
 959                 }
 960                 $this->insertComment( $r, $rcObj );
 961                 $this->insertRollback( $r, $rcObj );
 962                 # Tags
 963                 $this->insertTags( $r, $rcObj, $classes );
 964                 # Show how many people are watching this if enabled
 965                 $r .= $this->numberofWatchingusers($rcObj->numberofWatchingusers);
 966
 967                 $r .= "</td></tr></table>\n";
 968
 969                 wfProfileOut( __METHOD__ );
 970
 971                 return $r;
 972         }
 973
 974         /**
 975          * If enhanced RC is in use, this function takes the previously cached
 976          * RC lines, arranges them, and outputs the HTML
 977          */
 978         protected function recentChangesBlock() {
 979                 if( count ( $this->rc_cache ) == 0 ) {
 980                         return '';
 981                 }
 982
 983                 wfProfileIn( __METHOD__ );
 984
 985                 $blockOut = '';
 986                 foreach( $this->rc_cache as $block ) {
 987                         if( count( $block ) < 2 ) {
 988                                 $blockOut .= $this->recentChangesBlockLine( array_shift( $block ) );
 989                         } else {
 990                                 $blockOut .= $this->recentChangesBlockGroup( $block );
 991                         }
 992                 }
 993
 994                 wfProfileOut( __METHOD__ );
 995
 996                 return '<div>'.$blockOut.'</div>';
 997         }
 998
 999         /**
1000          * Returns text for the end of RC
1001          * If enhanced RC is in use, returns pretty much all the text
1002          */
1003         public function endRecentChangesList() {
1004                 return $this->recentChangesBlock() . parent::endRecentChangesList();
1005         }
1006
1007 }