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 = $rc->getTitle();
 327                         /** Check for rollback and edit permissions, disallow special pages, and only
 328                           * show a link on the top-most revision */
 329                         if ($wgUser->isAllowed('rollback') && $rc->mAttribs['page_latest'] == $rc->mAttribs['rc_this_oldid'] )
 330                         {
 331                                 $rev = new Revision( array(
 332                                         'id'        => $rc->mAttribs['rc_this_oldid'],
 333                                         'user'      => $rc->mAttribs['rc_user'],
 334                                         'user_text' => $rc->mAttribs['rc_user_text'],
 335                                         'deleted'   => $rc->mAttribs['rc_deleted']
 336                                 ) );
 337                                 $rev->setTitle( $page );
 338                                 $s .= ' '.$this->skin->generateRollback( $rev );
 339                         }
 340                 }
 341         }
 342
 343         protected function insertTags( &$s, &$rc, &$classes ) {
 344                 if ( empty($rc->mAttribs['ts_tags']) )
 345                         return;
 346
 347                 list($tagSummary, $newClasses) = ChangeTags::formatSummaryRow( $rc->mAttribs['ts_tags'], 'changeslist' );
 348                 $classes = array_merge( $classes, $newClasses );
 349                 $s .= ' ' . $tagSummary;
 350         }
 351
 352         protected function insertExtra( &$s, &$rc, &$classes ) {
 353                 ## Empty, used for subclassers to add anything special.
 354         }
 355 }
 356
 357
 358 /**
 359  * Generate a list of changes using the good old system (no javascript)
 360  */
 361 class OldChangesList extends ChangesList {
 362         /**
 363          * Format a line using the old system (aka without any javascript).
 364          */
 365         public function recentChangesLine( &$rc, $watched = false, $linenumber = NULL ) {
 366                 global $wgContLang, $wgLang, $wgRCShowChangedSize, $wgUser;
 367                 wfProfileIn( __METHOD__ );
 368                 # Should patrol-related stuff be shown?
 369                 $unpatrolled = $wgUser->useRCPatrol() && !$rc->mAttribs['rc_patrolled'];
 370
 371                 $dateheader = ''; // $s now contains only <li>...</li>, for hooks' convenience.
 372                 $this->insertDateHeader( $dateheader, $rc->mAttribs['rc_timestamp'] );
 373
 374                 $s = '';
 375                 $classes = array();
 376                 // use mw-line-even/mw-line-odd class only if linenumber is given (feature from bug 14468)
 377                 if( $linenumber ) {
 378                         if( $linenumber & 1 ) {
 379                                 $classes[] = 'mw-line-odd';
 380                         }
 381                         else {
 382                                 $classes[] = 'mw-line-even';
 383                         }
 384                 }
 385
 386                 // Moved pages
 387                 if( $rc->mAttribs['rc_type'] == RC_MOVE || $rc->mAttribs['rc_type'] == RC_MOVE_OVER_REDIRECT ) {
 388                         $this->insertMove( $s, $rc );
 389                 // Log entries
 390                 } elseif( $rc->mAttribs['rc_log_type'] ) {
 391                         $logtitle = Title::newFromText( 'Log/'.$rc->mAttribs['rc_log_type'], NS_SPECIAL );
 392                         $this->insertLog( $s, $logtitle, $rc->mAttribs['rc_log_type'] );
 393                 // Log entries (old format) or log targets, and special pages
 394                 } elseif( $rc->mAttribs['rc_namespace'] == NS_SPECIAL ) {
 395                         list( $name, $subpage ) = SpecialPage::resolveAliasWithSubpage( $rc->mAttribs['rc_title'] );
 396                         if( $name == 'Log' ) {
 397                                 $this->insertLog( $s, $rc->getTitle(), $subpage );
 398                         }
 399                 // Regular entries
 400                 } else {
 401                         $this->insertDiffHist( $s, $rc, $unpatrolled );
 402                         # M, N, b and ! (minor, new, bot and unpatrolled)
 403                         $s .= $this->recentChangesFlags( $rc->mAttribs['rc_new'], $rc->mAttribs['rc_minor'],
 404                                 $unpatrolled, '', $rc->mAttribs['rc_bot'] );
 405                         $this->insertArticleLink( $s, $rc, $unpatrolled, $watched );
 406                 }
 407                 # Edit/log timestamp
 408                 $this->insertTimestamp( $s, $rc );
 409                 # Bytes added or removed
 410                 if( $wgRCShowChangedSize ) {
 411                         $cd = $rc->getCharacterDifference();
 412                         if( $cd != '' ) {
 413                                 $s .= "$cd  . . ";
 414                         }
 415                 }
 416                 # User tool links
 417                 $this->insertUserRelatedLinks( $s, $rc );
 418                 # Log action text (if any)
 419                 $this->insertAction( $s, $rc );
 420                 # Edit or log comment
 421                 $this->insertComment( $s, $rc );
 422                 # Tags
 423                 $this->insertTags( $s, $rc, $classes );
 424                 # Rollback
 425                 $this->insertRollback( $s, $rc );
 426                 # For subclasses
 427                 $this->insertExtra( $s, $rc, $classes );
 428
 429                 # Mark revision as deleted if so
 430                 if( !$rc->mAttribs['rc_log_type'] && $this->isDeleted($rc,Revision::DELETED_TEXT) ) {
 431                    $s .= ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 432                 }
 433                 # How many users watch this page
 434                 if( $rc->numberofWatchingusers > 0 ) {
 435                         $s .= ' ' . wfMsgExt( 'number_of_watching_users_RCview',
 436                                 array( 'parsemag', 'escape' ), $wgLang->formatNum( $rc->numberofWatchingusers ) );
 437                 }
 438
 439                 wfRunHooks( 'OldChangesListRecentChangesLine', array(&$this, &$s, $rc) );
 440
 441                 wfProfileOut( __METHOD__ );
 442                 return "$dateheader<li class=\"".implode( ' ', $classes )."\">$s</li>\n";
 443         }
 444 }
 445
 446
 447 /**
 448  * Generate a list of changes using an Enhanced system (uses javascript).
 449  */
 450 class EnhancedChangesList extends ChangesList {
 451         /**
 452         *  Add the JavaScript file for enhanced changeslist
 453         *  @ return string
 454         */
 455         public function beginRecentChangesList() {
 456                 global $wgStylePath, $wgJsMimeType, $wgStyleVersion;
 457                 $this->rc_cache = array();
 458                 $this->rcMoveIndex = 0;
 459                 $this->rcCacheIndex = 0;
 460                 $this->lastdate = '';
 461                 $this->rclistOpen = false;
 462                 $script = Xml::tags( 'script', array(
 463                         'type' => $wgJsMimeType,
 464                         'src' => $wgStylePath . "/common/enhancedchanges.js?$wgStyleVersion" ), '' );
 465                 return $script;
 466         }
 467         /**
 468          * Format a line for enhanced recentchange (aka with javascript and block of lines).
 469          */
 470         public function recentChangesLine( &$baseRC, $watched = false ) {
 471                 global $wgLang, $wgContLang, $wgUser;
 472
 473                 wfProfileIn( __METHOD__ );
 474
 475                 # Create a specialised object
 476                 $rc = RCCacheEntry::newFromParent( $baseRC );
 477
 478                 # Extract fields from DB into the function scope (rc_xxxx variables)
 479                 // FIXME: Would be good to replace this extract() call with something
 480                 // that explicitly initializes variables.
 481                 extract( $rc->mAttribs );
 482                 $curIdEq = 'curid=' . $rc_cur_id;
 483
 484                 # If it's a new day, add the headline and flush the cache
 485                 $date = $wgLang->date( $rc_timestamp, true );
 486                 $ret = '';
 487                 if( $date != $this->lastdate ) {
 488                         # Process current cache
 489                         $ret = $this->recentChangesBlock();
 490                         $this->rc_cache = array();
 491                         $ret .= "<h4>{$date}</h4>\n";
 492                         $this->lastdate = $date;
 493                 }
 494
 495                 # Should patrol-related stuff be shown?
 496                 if( $wgUser->useRCPatrol() ) {
 497                         $rc->unpatrolled = !$rc_patrolled;
 498                 } else {
 499                         $rc->unpatrolled = false;
 500                 }
 501
 502                 $showdifflinks = true;
 503                 # Make article link
 504                 // Page moves
 505                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 506                         $msg = ( $rc_type == RC_MOVE ) ? "1movedto2" : "1movedto2_redir";
 507                         $clink = wfMsg( $msg, $this->skin->makeKnownLinkObj( $rc->getTitle(), '', 'redirect=no' ),
 508                           $this->skin->makeKnownLinkObj( $rc->getMovedToTitle(), '' ) );
 509                 // New unpatrolled pages
 510                 } else if( $rc->unpatrolled && $rc_type == RC_NEW ) {
 511                         $clink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '', "rcid={$rc_id}" );
 512                 // Log entries
 513                 } else if( $rc_type == RC_LOG ) {
 514                         if( $rc_log_type ) {
 515                                 $logtitle = SpecialPage::getTitleFor( 'Log', $rc_log_type );
 516                                 $clink = '(' . $this->skin->makeKnownLinkObj( $logtitle,
 517                                         LogPage::logName($rc_log_type) ) . ')';
 518                         } else {
 519                                 $clink = $this->skin->makeLinkObj( $rc->getTitle(), '' );
 520                         }
 521                         $watched = false;
 522                 // Log entries (old format) and special pages
 523                 } elseif( $rc_namespace == NS_SPECIAL ) {
 524                         list( $specialName, $logtype ) = SpecialPage::resolveAliasWithSubpage( $rc_title );
 525                         if ( $specialName == 'Log' ) {
 526                                 # Log updates, etc
 527                                 $logname = LogPage::logName( $logtype );
 528                                 $clink = '(' . $this->skin->makeKnownLinkObj( $rc->getTitle(), $logname ) . ')';
 529                         } else {
 530                                 wfDebug( "Unexpected special page in recentchanges\n" );
 531                                 $clink = '';
 532                         }
 533                 // Edits
 534                 } else {
 535                         $clink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '' );
 536                 }
 537
 538                 # Don't show unusable diff links
 539                 if ( !ChangesList::userCan($rc,Revision::DELETED_TEXT) ) {
 540                         $showdifflinks = false;
 541                 }
 542
 543                 $time = $wgContLang->time( $rc_timestamp, true, true );
 544                 $rc->watched = $watched;
 545                 $rc->link = $clink;
 546                 $rc->timestamp = $time;
 547                 $rc->numberofWatchingusers = $baseRC->numberofWatchingusers;
 548
 549                 # Make "cur" and "diff" links
 550                 if( $rc->unpatrolled ) {
 551                         $rcIdQuery = "&rcid={$rc_id}";
 552                 } else {
 553                         $rcIdQuery = '';
 554                 }
 555                 $querycur = $curIdEq."&diff=0&oldid=$rc_this_oldid";
 556                 $querydiff = $curIdEq."&diff=$rc_this_oldid&oldid=$rc_last_oldid$rcIdQuery";
 557                 $aprops = ' tabindex="'.$baseRC->counter.'"';
 558                 $curLink = $this->skin->makeKnownLinkObj( $rc->getTitle(),
 559                         $this->message['cur'], $querycur, '' ,'', $aprops );
 560
 561                 # Make "diff" an "cur" links
 562                 if( !$showdifflinks ) {
 563                    $curLink = $this->message['cur'];
 564                    $diffLink = $this->message['diff'];
 565                 } else if( in_array( $rc_type, array(RC_NEW,RC_LOG,RC_MOVE,RC_MOVE_OVER_REDIRECT) ) ) {
 566                         $curLink = ($rc_type != RC_NEW) ? $this->message['cur'] : $curLink;
 567                         $diffLink = $this->message['diff'];
 568                 } else {
 569                         $diffLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['diff'],
 570                                 $querydiff, '' ,'', $aprops );
 571                 }
 572
 573                 # Make "last" link
 574                 if( !$showdifflinks || !$rc_last_oldid ) {
 575                     $lastLink = $this->message['last'];
 576                 } else if( $rc_type == RC_LOG || $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 577                         $lastLink = $this->message['last'];
 578                 } else {
 579                         $lastLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['last'],
 580                         $curIdEq.'&diff='.$rc_this_oldid.'&oldid='.$rc_last_oldid . $rcIdQuery );
 581                 }
 582
 583                 # Make user links
 584                 if( $this->isDeleted($rc,Revision::DELETED_USER) ) {
 585                         $rc->userlink = ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 586                 } else {
 587                         $rc->userlink = $this->skin->userLink( $rc_user, $rc_user_text );
 588                         $rc->usertalklink = $this->skin->userToolLinks( $rc_user, $rc_user_text );
 589                 }
 590
 591                 $rc->lastlink = $lastLink;
 592                 $rc->curlink  = $curLink;
 593                 $rc->difflink = $diffLink;
 594
 595                 # Put accumulated information into the cache, for later display
 596                 # Page moves go on their own line
 597                 $title = $rc->getTitle();
 598                 $secureName = $title->getPrefixedDBkey();
 599                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 600                         # Use an @ character to prevent collision with page names
 601                         $this->rc_cache['@@' . ($this->rcMoveIndex++)] = array($rc);
 602                 } else {
 603                         # Logs are grouped by type
 604                         if( $rc_type == RC_LOG ){
 605                                 $secureName = SpecialPage::getTitleFor( 'Log', $rc_log_type )->getPrefixedDBkey();
 606                         }
 607                         if( !isset( $this->rc_cache[$secureName] ) ) {
 608                                 $this->rc_cache[$secureName] = array();
 609                         }
 610
 611                         array_push( $this->rc_cache[$secureName], $rc );
 612                 }
 613
 614                 wfProfileOut( __METHOD__ );
 615
 616                 return $ret;
 617         }
 618
 619         /**
 620          * Enhanced RC group
 621          */
 622         protected function recentChangesBlockGroup( $block ) {
 623                 global $wgLang, $wgContLang, $wgRCShowChangedSize;
 624
 625                 wfProfileIn( __METHOD__ );
 626
 627                 $r = '<table cellpadding="0" cellspacing="0" border="0" style="background: none"><tr>';
 628
 629                 # Collate list of users
 630                 $userlinks = array();
 631                 # Other properties
 632                 $unpatrolled = false;
 633                 $isnew = false;
 634                 $curId = $currentRevision = 0;
 635                 # Some catalyst variables...
 636                 $namehidden = true;
 637                 $allLogs = true;
 638                 foreach( $block as $rcObj ) {
 639                         $oldid = $rcObj->mAttribs['rc_last_oldid'];
 640                         if( $rcObj->mAttribs['rc_new'] ) {
 641                                 $isnew = true;
 642                         }
 643                         // If all log actions to this page were hidden, then don't
 644                         // give the name of the affected page for this block!
 645                         if( !$this->isDeleted( $rcObj, LogPage::DELETED_ACTION ) ) {
 646                                 $namehidden = false;
 647                         }
 648                         $u = $rcObj->userlink;
 649                         if( !isset( $userlinks[$u] ) ) {
 650                                 $userlinks[$u] = 0;
 651                         }
 652                         if( $rcObj->unpatrolled ) {
 653                                 $unpatrolled = true;
 654                         }
 655                         if( $rcObj->mAttribs['rc_type'] != RC_LOG ) {
 656                                 $allLogs = false;
 657                         }
 658                         # Get the latest entry with a page_id and oldid
 659                         # since logs may not have these.
 660                         if( !$curId && $rcObj->mAttribs['rc_cur_id'] ) {
 661                                 $curId = $rcObj->mAttribs['rc_cur_id'];
 662                         }
 663                         if( !$currentRevision && $rcObj->mAttribs['rc_this_oldid'] ) {
 664                                 $currentRevision = $rcObj->mAttribs['rc_this_oldid'];
 665                         }
 666
 667                         $bot = $rcObj->mAttribs['rc_bot'];
 668                         $userlinks[$u]++;
 669                 }
 670
 671                 # Sort the list and convert to text
 672                 krsort( $userlinks );
 673                 asort( $userlinks );
 674                 $users = array();
 675                 foreach( $userlinks as $userlink => $count) {
 676                         $text = $userlink;
 677                         $text .= $wgContLang->getDirMark();
 678                         if( $count > 1 ) {
 679                                 $text .= ' (' . $wgLang->formatNum( $count ) . '×)';
 680                         }
 681                         array_push( $users, $text );
 682                 }
 683
 684                 $users = ' <span class="changedby">[' .
 685                         implode( $this->message['semicolon-separator'], $users ) . ']</span>';
 686
 687                 # ID for JS visibility toggle
 688                 $jsid = $this->rcCacheIndex;
 689                 # onclick handler to toggle hidden/expanded
 690                 $toggleLink = "onclick='toggleVisibility($jsid); return false'";
 691                 # Title for <a> tags
 692                 $expandTitle = htmlspecialchars( wfMsg( 'rc-enhanced-expand' ) );
 693                 $closeTitle = htmlspecialchars( wfMsg( 'rc-enhanced-hide' ) );
 694
 695                 $tl = "<span id='mw-rc-openarrow-$jsid' class='mw-changeslist-expanded' style='visibility:hidden'><a href='#' $toggleLink title='$expandTitle'>" . $this->sideArrow() . "</a></span>";
 696                 $tl .= "<span id='mw-rc-closearrow-$jsid' class='mw-changeslist-hidden' style='display:none'><a href='#' $toggleLink title='$closeTitle'>" . $this->downArrow() . "</a></span>";
 697                 $r .= '<td valign="top" style="white-space: nowrap"><tt>'.$tl.'&nbsp;';
 698
 699                 # Main line
 700                 $r .= $this->recentChangesFlags( $isnew, false, $unpatrolled, '&nbsp;', $bot );
 701
 702                 # Timestamp
 703                 $r .= '&nbsp;'.$block[0]->timestamp.'&nbsp;</tt></td><td>';
 704
 705                 # Article link
 706                 if( $namehidden ) {
 707                         $r .= ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-event' ) . '</span>';
 708                 } else if( $allLogs ) {
 709                         $r .= $this->maybeWatchedLink( $block[0]->link, $block[0]->watched );
 710                 } else {
 711                         $this->insertArticleLink( $r, $block[0], $block[0]->unpatrolled, $block[0]->watched );
 712                 }
 713
 714                 $r .= $wgContLang->getDirMark();
 715
 716                 $curIdEq = 'curid=' . $curId;
 717                 # Changes message
 718                 $n = count($block);
 719                 static $nchanges = array();
 720                 if ( !isset( $nchanges[$n] ) ) {
 721                         $nchanges[$n] = wfMsgExt( 'nchanges', array( 'parsemag', 'escape' ), $wgLang->formatNum( $n ) );
 722                 }
 723                 # Total change link
 724                 $r .= ' ';
 725                 if( !$allLogs ) {
 726                         $r .= '(';
 727                         if( !ChangesList::userCan( $rcObj, Revision::DELETED_TEXT ) ) {
 728                                 $r .= $nchanges[$n];
 729                         } else if( $isnew ) {
 730                                 $r .= $nchanges[$n];
 731                         } else {
 732                                 $r .= $this->skin->makeKnownLinkObj( $block[0]->getTitle(),
 733                                         $nchanges[$n], $curIdEq."&diff=$currentRevision&oldid=$oldid" );
 734                         }
 735                 }
 736
 737                 # History
 738                 if( $allLogs ) {
 739                         // don't show history link for logs
 740                 } else if( $namehidden || !$block[0]->getTitle()->exists() ) {
 741                         $r .= $this->message['semicolon-separator'] . $this->message['hist'] . ')';
 742                 } else {
 743                         $r .= $this->message['semicolon-separator'] . $this->skin->makeKnownLinkObj( $block[0]->getTitle(),
 744                                 $this->message['hist'], $curIdEq . '&action=history' ) . ')';
 745                 }
 746                 $r .= ' . . ';
 747
 748                 # Character difference (does not apply if only log items)
 749                 if( $wgRCShowChangedSize && !$allLogs ) {
 750                         $last = 0;
 751                         $first = count($block) - 1;
 752                         # Some events (like logs) have an "empty" size, so we need to skip those...
 753                         while( $last < $first && $block[$last]->mAttribs['rc_new_len'] === NULL ) {
 754                                 $last++;
 755                         }
 756                         while( $first > $last && $block[$first]->mAttribs['rc_old_len'] === NULL ) {
 757                                 $first--;
 758                         }
 759                         # Get net change
 760                         $chardiff = $rcObj->getCharacterDifference( $block[$first]->mAttribs['rc_old_len'],
 761                                 $block[$last]->mAttribs['rc_new_len'] );
 762
 763                         if( $chardiff == '' ) {
 764                                 $r .= ' ';
 765                         } else {
 766                                 $r .= ' ' . $chardiff. ' . . ';
 767                         }
 768                 }
 769
 770                 $r .= $users;
 771                 $r .= $this->numberofWatchingusers($block[0]->numberofWatchingusers);
 772
 773                 $r .= "</td></tr></table>\n";
 774
 775                 # Sub-entries
 776                 $r .= '<div id="mw-rc-subentries-'.$jsid.'" class="mw-changeslist-hidden">';
 777                 $r .= '<table cellpadding="0" cellspacing="0"  border="0" style="background: none">';
 778                 foreach( $block as $rcObj ) {
 779                         # Extract fields from DB into the function scope (rc_xxxx variables)
 780                         // FIXME: Would be good to replace this extract() call with something
 781                         // that explicitly initializes variables.
 782                         # Classes to apply -- TODO implement
 783                         $classes = array();
 784                         extract( $rcObj->mAttribs );
 785
 786                         #$r .= '<tr><td valign="top">'.$this->spacerArrow();
 787                         $r .= '<tr><td valign="top">';
 788                         $r .= '<tt>'.$this->spacerIndent() . $this->spacerIndent();
 789                         $r .= $this->recentChangesFlags( $rc_new, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot );
 790                         $r .= '&nbsp;</tt></td><td valign="top">';
 791
 792                         $o = '';
 793                         if( $rc_this_oldid != 0 ) {
 794                                 $o = 'oldid='.$rc_this_oldid;
 795                         }
 796                         # Log timestamp
 797                         if( $rc_type == RC_LOG ) {
 798                                 $link = '<tt>'.$rcObj->timestamp.'</tt> ';
 799                         # Revision link
 800                         } else if( !ChangesList::userCan($rcObj,Revision::DELETED_TEXT) ) {
 801                                 $link = '<span class="history-deleted"><tt>'.$rcObj->timestamp.'</tt></span> ';
 802                         } else {
 803                                 $rcIdEq = ($rcObj->unpatrolled && $rc_type == RC_NEW) ?
 804                                         '&rcid='.$rcObj->mAttribs['rc_id'] : '';
 805                                 $link = '<tt>'.$this->skin->makeKnownLinkObj( $rcObj->getTitle(),
 806                                         $rcObj->timestamp, $curIdEq.'&'.$o.$rcIdEq ).'</tt>';
 807                                 if( $this->isDeleted($rcObj,Revision::DELETED_TEXT) )
 808                                         $link = '<span class="history-deleted">'.$link.'</span> ';
 809                         }
 810                         $r .= $link;
 811
 812                         if ( !$rc_type == RC_LOG || $rc_type == RC_NEW ) {
 813                                 $r .= ' (';
 814                                 $r .= $rcObj->curlink;
 815                                 $r .= $this->message['semicolon-separator'];
 816                                 $r .= $rcObj->lastlink;
 817                                 $r .= ')';
 818                         }
 819                         $r .= ' . . ';
 820
 821                         # Character diff
 822                         if( $wgRCShowChangedSize ) {
 823                                 $r .= ( $rcObj->getCharacterDifference() == '' ? '' : $rcObj->getCharacterDifference() . ' . . ' ) ;
 824                         }
 825                         # User links
 826                         $r .= $rcObj->userlink;
 827                         $r .= $rcObj->usertalklink;
 828                         // log action
 829                         $this->insertAction( $r, $rcObj );
 830                         // log comment
 831                         $this->insertComment( $r, $rcObj );
 832                         # Rollback
 833                         $this->insertRollback( $r, $rcObj );
 834                         # Tags
 835                         $this->insertTags( $r, $rcObj, $classes );
 836
 837                         # Mark revision as deleted
 838                         if( !$rc_log_type && $this->isDeleted($rcObj,Revision::DELETED_TEXT) ) {
 839                                 $r .= ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 840                         }
 841
 842                         $r .= "</td></tr>\n";
 843                 }
 844                 $r .= "</table></div>\n";
 845
 846                 $this->rcCacheIndex++;
 847
 848                 wfProfileOut( __METHOD__ );
 849
 850                 return $r;
 851         }
 852
 853         /**
 854          * Generate HTML for an arrow or placeholder graphic
 855          * @param string $dir one of '', 'd', 'l', 'r'
 856          * @param string $alt text
 857          * @param string $title text
 858          * @return string HTML <img> tag
 859          */
 860         protected function arrow( $dir, $alt='', $title='' ) {
 861                 global $wgStylePath;
 862                 $encUrl = htmlspecialchars( $wgStylePath . '/common/images/Arr_' . $dir . '.png' );
 863                 $encAlt = htmlspecialchars( $alt );
 864                 $encTitle = htmlspecialchars( $title );
 865                 return "<img src=\"$encUrl\" width=\"12\" height=\"12\" alt=\"$encAlt\" title=\"$encTitle\" />";
 866         }
 867
 868         /**
 869          * Generate HTML for a right- or left-facing arrow,
 870          * depending on language direction.
 871          * @return string HTML <img> tag
 872          */
 873         protected function sideArrow() {
 874                 global $wgContLang;
 875                 $dir = $wgContLang->isRTL() ? 'l' : 'r';
 876                 return $this->arrow( $dir, '+', wfMsg( 'rc-enhanced-expand' ) );
 877         }
 878
 879         /**
 880          * Generate HTML for a down-facing arrow
 881          * depending on language direction.
 882          * @return string HTML <img> tag
 883          */
 884         protected function downArrow() {
 885                 return $this->arrow( 'd', '-', wfMsg( 'rc-enhanced-hide' ) );
 886         }
 887
 888         /**
 889          * Generate HTML for a spacer image
 890          * @return string HTML <img> tag
 891          */
 892         protected function spacerArrow() {
 893                 return $this->arrow( '', codepointToUtf8( 0xa0 ) ); // non-breaking space
 894         }
 895
 896         /**
 897          * Add a set of spaces
 898          * @return string HTML <td> tag
 899          */
 900         protected function spacerIndent() {
 901                 return '&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;';
 902         }
 903
 904         /**
 905          * Enhanced RC ungrouped line.
 906          * @return string a HTML formated line (generated using $r)
 907          */
 908         protected function recentChangesBlockLine( $rcObj ) {
 909                 global $wgContLang, $wgRCShowChangedSize;
 910
 911                 wfProfileIn( __METHOD__ );
 912
 913                 # Extract fields from DB into the function scope (rc_xxxx variables)
 914                 // FIXME: Would be good to replace this extract() call with something
 915                 // that explicitly initializes variables.
 916                 $classes = array(); // TODO implement
 917                 extract( $rcObj->mAttribs );
 918                 $curIdEq = "curid={$rc_cur_id}";
 919
 920                 $r = '<table cellspacing="0" cellpadding="0" border="0" style="background: none"><tr>';
 921                 $r .= '<td valign="top" style="white-space: nowrap"><tt>' . $this->spacerArrow() . '&nbsp;';
 922                 # Flag and Timestamp
 923                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 924                         $r .= '&nbsp;&nbsp;&nbsp;&nbsp;'; // 4 flags -> 4 spaces
 925                 } else {
 926                         $r .= $this->recentChangesFlags( $rc_type == RC_NEW, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot );
 927                 }
 928                 $r .= '&nbsp;'.$rcObj->timestamp.'&nbsp;</tt></td><td>';
 929                 # Article or log link
 930                 if( $rc_log_type ) {
 931                         $logtitle = Title::newFromText( "Log/$rc_log_type", NS_SPECIAL );
 932                         $logname = LogPage::logName( $rc_log_type );
 933                         $r .= '(' . $this->skin->makeKnownLinkObj($logtitle, $logname ) . ')';
 934                 } else {
 935                         $this->insertArticleLink( $r, $rcObj, $rcObj->unpatrolled, $rcObj->watched );
 936                 }
 937                 # Diff and hist links
 938                 if ( $rc_type != RC_LOG ) {
 939                         $r .= ' ('. $rcObj->difflink . $this->message['semicolon-separator'];
 940                         $r .= $this->skin->makeKnownLinkObj( $rcObj->getTitle(), $this->message['hist'],
 941                                 $curIdEq.'&action=history' ) . ')';
 942                 }
 943                 $r .= ' . . ';
 944                 # Character diff
 945                 if( $wgRCShowChangedSize && ($cd = $rcObj->getCharacterDifference()) ) {
 946                         $r .= "$cd . . ";
 947                 }
 948                 # User/talk
 949                 $r .= ' '.$rcObj->userlink . $rcObj->usertalklink;
 950                 # Log action (if any)
 951                 if( $rc_log_type ) {
 952                         if( $this->isDeleted($rcObj,LogPage::DELETED_ACTION) ) {
 953                                 $r .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 954                         } else {
 955                                 $r .= ' ' . LogPage::actionText( $rc_log_type, $rc_log_action, $rcObj->getTitle(),
 956                                         $this->skin, LogPage::extractParams($rc_params), true, true );
 957                         }
 958                 }
 959                 $this->insertComment( $r, $rcObj );
 960                 $this->insertRollback( $r, $rcObj );
 961                 # Tags
 962                 $this->insertTags( $r, $rcObj, $classes );
 963                 # Show how many people are watching this if enabled
 964                 $r .= $this->numberofWatchingusers($rcObj->numberofWatchingusers);
 965
 966                 $r .= "</td></tr></table>\n";
 967
 968                 wfProfileOut( __METHOD__ );
 969
 970                 return $r;
 971         }
 972
 973         /**
 974          * If enhanced RC is in use, this function takes the previously cached
 975          * RC lines, arranges them, and outputs the HTML
 976          */
 977         protected function recentChangesBlock() {
 978                 if( count ( $this->rc_cache ) == 0 ) {
 979                         return '';
 980                 }
 981
 982                 wfProfileIn( __METHOD__ );
 983
 984                 $blockOut = '';
 985                 foreach( $this->rc_cache as $block ) {
 986                         if( count( $block ) < 2 ) {
 987                                 $blockOut .= $this->recentChangesBlockLine( array_shift( $block ) );
 988                         } else {
 989                                 $blockOut .= $this->recentChangesBlockGroup( $block );
 990                         }
 991                 }
 992
 993                 wfProfileOut( __METHOD__ );
 994
 995                 return '<div>'.$blockOut.'</div>';
 996         }
 997
 998         /**
 999          * Returns text for the end of RC
1000          * If enhanced RC is in use, returns pretty much all the text
1001          */
1002         public function endRecentChangesList() {
1003                 return $this->recentChangesBlock() . parent::endRecentChangesList();
1004         }
1005
1006 }