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, $wgMiserMode;
 110                 $szdiff = $new - $old;
 111
 112                 $code = $wgLang->getCode();
 113                 static $fastCharDiff = array();
 114                 if ( !isset($fastCharDiff[$code]) ) {
 115                         $fastCharDiff[$code] = $wgMiserMode || wfMsgNoTrans( 'rc-change-size' ) === '$1';
 116                 }
 117
 118                 $formatedSize = $wgLang->formatNum($szdiff);
 119
 120                 if ( !$fastCharDiff[$code] ) {
 121                         $formatedSize = wfMsgExt( 'rc-change-size', array( 'parsemag', 'escape' ), $formatedSize );
 122                 }
 123
 124                 if( abs( $szdiff ) > abs( $wgRCChangedSizeThreshold ) ) {
 125                         $tag = 'strong';
 126                 } else {
 127                     $tag = 'span';
 128                 }
 129                 if( $szdiff === 0 ) {
 130                         return "<$tag class='mw-plusminus-null'>($formatedSize)</$tag>";
 131                 } elseif( $szdiff > 0 ) {
 132                         return "<$tag class='mw-plusminus-pos'>(+$formatedSize)</$tag>";
 133             } else {
 134                         return "<$tag class='mw-plusminus-neg'>($formatedSize)</$tag>";
 135                 }
 136         }
 137
 138         /**
 139          * Returns text for the end of RC
 140          * @return string
 141          */
 142         public function endRecentChangesList() {
 143                 if( $this->rclistOpen ) {
 144                         return "</ul>\n";
 145                 } else {
 146                         return '';
 147                 }
 148         }
 149
 150         protected function insertMove( &$s, $rc ) {
 151                 # Diff
 152                 $s .= '(' . $this->message['diff'] . ') (';
 153                 # Hist
 154                 $s .= $this->skin->makeKnownLinkObj( $rc->getMovedToTitle(), $this->message['hist'],
 155                         'action=history' ) . ') . . ';
 156                 # "[[x]] moved to [[y]]"
 157                 $msg = ( $rc->mAttribs['rc_type'] == RC_MOVE ) ? '1movedto2' : '1movedto2_redir';
 158                 $s .= wfMsg( $msg, $this->skin->makeKnownLinkObj( $rc->getTitle(), '', 'redirect=no' ),
 159                         $this->skin->makeKnownLinkObj( $rc->getMovedToTitle(), '' ) );
 160         }
 161
 162         protected function insertDateHeader( &$s, $rc_timestamp ) {
 163                 global $wgLang;
 164                 # Make date header if necessary
 165                 $date = $wgLang->date( $rc_timestamp, true, true );
 166                 if( $date != $this->lastdate ) {
 167                         if( '' != $this->lastdate ) {
 168                                 $s .= "</ul>\n";
 169                         }
 170                         $s .= '<h4>'.$date."</h4>\n<ul class=\"special\">";
 171                         $this->lastdate = $date;
 172                         $this->rclistOpen = true;
 173                 }
 174         }
 175
 176         protected function insertLog( &$s, $title, $logtype ) {
 177                 $logname = LogPage::logName( $logtype );
 178                 $s .= '(' . $this->skin->makeKnownLinkObj($title, $logname ) . ')';
 179         }
 180
 181         protected function insertDiffHist( &$s, &$rc, $unpatrolled ) {
 182                 # Diff link
 183                 if( $rc->mAttribs['rc_type'] == RC_NEW || $rc->mAttribs['rc_type'] == RC_LOG ) {
 184                         $diffLink = $this->message['diff'];
 185                 } else if( !$this->userCan($rc,Revision::DELETED_TEXT) ) {
 186                         $diffLink = $this->message['diff'];
 187                 } else {
 188                         $rcidparam = $unpatrolled ? array( 'rcid' => $rc->mAttribs['rc_id'] ) : array();
 189                         $diffLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['diff'],
 190                                 wfArrayToCGI( array(
 191                                         'curid' => $rc->mAttribs['rc_cur_id'],
 192                                         'diff'  => $rc->mAttribs['rc_this_oldid'],
 193                                         'oldid' => $rc->mAttribs['rc_last_oldid'] ),
 194                                         $rcidparam ),
 195                                 '', '', ' tabindex="'.$rc->counter.'"');
 196                 }
 197                 $s .= '('.$diffLink.') (';
 198                 # History link
 199                 $s .= $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['hist'],
 200                         wfArrayToCGI( array(
 201                                 'curid' => $rc->mAttribs['rc_cur_id'],
 202                                 'action' => 'history' ) ) );
 203                 $s .= ') . . ';
 204         }
 205
 206         protected function insertArticleLink( &$s, &$rc, $unpatrolled, $watched ) {
 207                 global $wgContLang;
 208                 # If it's a new article, there is no diff link, but if it hasn't been
 209                 # patrolled yet, we need to give users a way to do so
 210                 $params = ( $unpatrolled && $rc->mAttribs['rc_type'] == RC_NEW ) ?
 211                         'rcid='.$rc->mAttribs['rc_id'] : '';
 212                 if( $this->isDeleted($rc,Revision::DELETED_TEXT) ) {
 213                         $articlelink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '', $params );
 214                         $articlelink = '<span class="history-deleted">'.$articlelink.'</span>';
 215                 } else {
 216                     $articlelink = ' '. $this->skin->makeKnownLinkObj( $rc->getTitle(), '', $params );
 217                 }
 218                 # Bolden pages watched by this user
 219                 if( $watched ) {
 220                         $articlelink = "<strong class=\"mw-watched\">{$articlelink}</strong>";
 221                 }
 222                 # RTL/LTR marker
 223                 $articlelink .= $wgContLang->getDirMark();
 224
 225                 wfRunHooks( 'ChangesListInsertArticleLink',
 226                         array(&$this, &$articlelink, &$s, &$rc, $unpatrolled, $watched) );
 227
 228                 $s .= " $articlelink";
 229         }
 230
 231         protected function insertTimestamp( &$s, $rc ) {
 232                 global $wgLang;
 233                 $s .= $this->message['semicolon-separator'] .
 234                         $wgLang->time( $rc->mAttribs['rc_timestamp'], true, true ) . ' . . ';
 235         }
 236
 237         /** Insert links to user page, user talk page and eventually a blocking link */
 238         public function insertUserRelatedLinks( &$s, &$rc ) {
 239                 if( $this->isDeleted( $rc, Revision::DELETED_USER ) ) {
 240                    $s .= ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 241                 } else {
 242                   $s .= $this->skin->userLink( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 243                   $s .= $this->skin->userToolLinks( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 244                 }
 245         }
 246
 247         /** insert a formatted action */
 248         protected function insertAction( &$s, &$rc ) {
 249                 if( $rc->mAttribs['rc_type'] == RC_LOG ) {
 250                         if( $this->isDeleted( $rc, LogPage::DELETED_ACTION ) ) {
 251                                 $s .= ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-event' ) . '</span>';
 252                         } else {
 253                                 $s .= ' '.LogPage::actionText( $rc->mAttribs['rc_log_type'], $rc->mAttribs['rc_log_action'],
 254                                         $rc->getTitle(), $this->skin, LogPage::extractParams( $rc->mAttribs['rc_params'] ), true, true );
 255                         }
 256                 }
 257         }
 258
 259         /** insert a formatted comment */
 260         protected function insertComment( &$s, &$rc ) {
 261                 if( $rc->mAttribs['rc_type'] != RC_MOVE && $rc->mAttribs['rc_type'] != RC_MOVE_OVER_REDIRECT ) {
 262                         if( $this->isDeleted( $rc, Revision::DELETED_COMMENT ) ) {
 263                                 $s .= ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-comment' ) . '</span>';
 264                         } else {
 265                                 $s .= $this->skin->commentBlock( $rc->mAttribs['rc_comment'], $rc->getTitle() );
 266                         }
 267                 }
 268         }
 269
 270         /**
 271          * Check whether to enable recent changes patrol features
 272          * @return bool
 273          */
 274         public static function usePatrol() {
 275                 global $wgUser;
 276                 return $wgUser->useRCPatrol();
 277         }
 278
 279         /**
 280          * Returns the string which indicates the number of watching users
 281          */
 282         protected function numberofWatchingusers( $count ) {
 283                 global $wgLang;
 284                 static $cache = array();
 285                 if( $count > 0 ) {
 286                         if( !isset( $cache[$count] ) ) {
 287                                 $cache[$count] = wfMsgExt( 'number_of_watching_users_RCview',
 288                                         array('parsemag', 'escape' ), $wgLang->formatNum( $count ) );
 289                         }
 290                         return $cache[$count];
 291                 } else {
 292                         return '';
 293                 }
 294         }
 295
 296         /**
 297          * Determine if said field of a revision is hidden
 298          * @param RCCacheEntry $rc
 299          * @param int $field one of DELETED_* bitfield constants
 300          * @return bool
 301          */
 302         public static function isDeleted( $rc, $field ) {
 303                 return ( $rc->mAttribs['rc_deleted'] & $field ) == $field;
 304         }
 305
 306         /**
 307          * Determine if the current user is allowed to view a particular
 308          * field of this revision, if it's marked as deleted.
 309          * @param RCCacheEntry $rc
 310          * @param int $field
 311          * @return bool
 312          */
 313         public static function userCan( $rc, $field ) {
 314                 if( ( $rc->mAttribs['rc_deleted'] & $field ) == $field ) {
 315                         global $wgUser;
 316                         $permission = ( $rc->mAttribs['rc_deleted'] & Revision::DELETED_RESTRICTED ) == Revision::DELETED_RESTRICTED
 317                                 ? 'suppressrevision'
 318                                 : 'deleterevision';
 319                         wfDebug( "Checking for $permission due to $field match on {$rc->mAttribs['rc_deleted']}\n" );
 320                         return $wgUser->isAllowed( $permission );
 321                 } else {
 322                         return true;
 323                 }
 324         }
 325
 326         protected function maybeWatchedLink( $link, $watched=false ) {
 327                 if( $watched ) {
 328                         return '<strong class="mw-watched">' . $link . '</strong>';
 329                 } else {
 330                         return '<span class="mw-rc-unwatched">' . $link . '</span>';
 331                 }
 332         }
 333
 334         /** Inserts a rollback link */
 335         protected function insertRollback( &$s, &$rc ) {
 336                 global $wgUser;
 337                 if( !$rc->mAttribs['rc_new'] && $rc->mAttribs['rc_this_oldid'] && $rc->mAttribs['rc_cur_id'] ) {
 338                         $page = $rc->getTitle();
 339                         /** Check for rollback and edit permissions, disallow special pages, and only
 340                           * show a link on the top-most revision */
 341                         if ($wgUser->isAllowed('rollback') && $rc->mAttribs['page_latest'] == $rc->mAttribs['rc_this_oldid'] )
 342                         {
 343                                 $rev = new Revision( array(
 344                                         'id'        => $rc->mAttribs['rc_this_oldid'],
 345                                         'user'      => $rc->mAttribs['rc_user'],
 346                                         'user_text' => $rc->mAttribs['rc_user_text'],
 347                                         'deleted'   => $rc->mAttribs['rc_deleted']
 348                                 ) );
 349                                 $rev->setTitle( $page );
 350                                 $s .= ' '.$this->skin->generateRollback( $rev );
 351                         }
 352                 }
 353         }
 354
 355         protected function insertTags( &$s, &$rc, &$classes ) {
 356                 if ( empty($rc->mAttribs['ts_tags']) )
 357                         return;
 358
 359                 list($tagSummary, $newClasses) = ChangeTags::formatSummaryRow( $rc->mAttribs['ts_tags'], 'changeslist' );
 360                 $classes = array_merge( $classes, $newClasses );
 361                 $s .= ' ' . $tagSummary;
 362         }
 363
 364         protected function insertExtra( &$s, &$rc, &$classes ) {
 365                 ## Empty, used for subclassers to add anything special.
 366         }
 367 }
 368
 369
 370 /**
 371  * Generate a list of changes using the good old system (no javascript)
 372  */
 373 class OldChangesList extends ChangesList {
 374         /**
 375          * Format a line using the old system (aka without any javascript).
 376          */
 377         public function recentChangesLine( &$rc, $watched = false, $linenumber = NULL ) {
 378                 global $wgLang, $wgRCShowChangedSize, $wgUser;
 379                 wfProfileIn( __METHOD__ );
 380                 # Should patrol-related stuff be shown?
 381                 $unpatrolled = $wgUser->useRCPatrol() && !$rc->mAttribs['rc_patrolled'];
 382
 383                 $dateheader = ''; // $s now contains only <li>...</li>, for hooks' convenience.
 384                 $this->insertDateHeader( $dateheader, $rc->mAttribs['rc_timestamp'] );
 385
 386                 $s = '';
 387                 $classes = array();
 388                 // use mw-line-even/mw-line-odd class only if linenumber is given (feature from bug 14468)
 389                 if( $linenumber ) {
 390                         if( $linenumber & 1 ) {
 391                                 $classes[] = 'mw-line-odd';
 392                         }
 393                         else {
 394                                 $classes[] = 'mw-line-even';
 395                         }
 396                 }
 397
 398                 // Moved pages
 399                 if( $rc->mAttribs['rc_type'] == RC_MOVE || $rc->mAttribs['rc_type'] == RC_MOVE_OVER_REDIRECT ) {
 400                         $this->insertMove( $s, $rc );
 401                 // Log entries
 402                 } elseif( $rc->mAttribs['rc_log_type'] ) {
 403                         $logtitle = Title::newFromText( 'Log/'.$rc->mAttribs['rc_log_type'], NS_SPECIAL );
 404                         $this->insertLog( $s, $logtitle, $rc->mAttribs['rc_log_type'] );
 405                 // Log entries (old format) or log targets, and special pages
 406                 } elseif( $rc->mAttribs['rc_namespace'] == NS_SPECIAL ) {
 407                         list( $name, $subpage ) = SpecialPage::resolveAliasWithSubpage( $rc->mAttribs['rc_title'] );
 408                         if( $name == 'Log' ) {
 409                                 $this->insertLog( $s, $rc->getTitle(), $subpage );
 410                         }
 411                 // Regular entries
 412                 } else {
 413                         $this->insertDiffHist( $s, $rc, $unpatrolled );
 414                         # M, N, b and ! (minor, new, bot and unpatrolled)
 415                         $s .= $this->recentChangesFlags( $rc->mAttribs['rc_new'], $rc->mAttribs['rc_minor'],
 416                                 $unpatrolled, '', $rc->mAttribs['rc_bot'] );
 417                         $this->insertArticleLink( $s, $rc, $unpatrolled, $watched );
 418                 }
 419                 # Edit/log timestamp
 420                 $this->insertTimestamp( $s, $rc );
 421                 # Bytes added or removed
 422                 if( $wgRCShowChangedSize ) {
 423                         $cd = $rc->getCharacterDifference();
 424                         if( $cd != '' ) {
 425                                 $s .= "$cd  . . ";
 426                         }
 427                 }
 428                 # User tool links
 429                 $this->insertUserRelatedLinks( $s, $rc );
 430                 # Log action text (if any)
 431                 $this->insertAction( $s, $rc );
 432                 # Edit or log comment
 433                 $this->insertComment( $s, $rc );
 434                 # Tags
 435                 $this->insertTags( $s, $rc, $classes );
 436                 # Rollback
 437                 $this->insertRollback( $s, $rc );
 438                 # For subclasses
 439                 $this->insertExtra( $s, $rc, $classes );
 440
 441                 # Mark revision as deleted if so
 442                 if( !$rc->mAttribs['rc_log_type'] && $this->isDeleted($rc,Revision::DELETED_TEXT) ) {
 443                    $s .= ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 444                 }
 445                 # How many users watch this page
 446                 if( $rc->numberofWatchingusers > 0 ) {
 447                         $s .= ' ' . wfMsgExt( 'number_of_watching_users_RCview',
 448                                 array( 'parsemag', 'escape' ), $wgLang->formatNum( $rc->numberofWatchingusers ) );
 449                 }
 450
 451                 wfRunHooks( 'OldChangesListRecentChangesLine', array(&$this, &$s, $rc) );
 452
 453                 wfProfileOut( __METHOD__ );
 454                 return "$dateheader<li class=\"".implode( ' ', $classes )."\">$s</li>\n";
 455         }
 456 }
 457
 458
 459 /**
 460  * Generate a list of changes using an Enhanced system (uses javascript).
 461  */
 462 class EnhancedChangesList extends ChangesList {
 463         /**
 464         *  Add the JavaScript file for enhanced changeslist
 465         *  @ return string
 466         */
 467         public function beginRecentChangesList() {
 468                 global $wgStylePath, $wgJsMimeType, $wgStyleVersion;
 469                 $this->rc_cache = array();
 470                 $this->rcMoveIndex = 0;
 471                 $this->rcCacheIndex = 0;
 472                 $this->lastdate = '';
 473                 $this->rclistOpen = false;
 474                 $script = Xml::tags( 'script', array(
 475                         'type' => $wgJsMimeType,
 476                         'src' => $wgStylePath . "/common/enhancedchanges.js?$wgStyleVersion" ), '' );
 477                 return $script;
 478         }
 479         /**
 480          * Format a line for enhanced recentchange (aka with javascript and block of lines).
 481          */
 482         public function recentChangesLine( &$baseRC, $watched = false ) {
 483                 global $wgLang, $wgUser;
 484
 485                 wfProfileIn( __METHOD__ );
 486
 487                 # Create a specialised object
 488                 $rc = RCCacheEntry::newFromParent( $baseRC );
 489
 490                 # Extract fields from DB into the function scope (rc_xxxx variables)
 491                 // FIXME: Would be good to replace this extract() call with something
 492                 // that explicitly initializes variables.
 493                 extract( $rc->mAttribs );
 494                 $curIdEq = array( 'curid' => $rc_cur_id );
 495
 496                 # If it's a new day, add the headline and flush the cache
 497                 $date = $wgLang->date( $rc_timestamp, true );
 498                 $ret = '';
 499                 if( $date != $this->lastdate ) {
 500                         # Process current cache
 501                         $ret = $this->recentChangesBlock();
 502                         $this->rc_cache = array();
 503                         $ret .= "<h4>{$date}</h4>\n";
 504                         $this->lastdate = $date;
 505                 }
 506
 507                 # Should patrol-related stuff be shown?
 508                 if( $wgUser->useRCPatrol() ) {
 509                         $rc->unpatrolled = !$rc_patrolled;
 510                 } else {
 511                         $rc->unpatrolled = false;
 512                 }
 513
 514                 $showdifflinks = true;
 515                 # Make article link
 516                 // Page moves
 517                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 518                         $msg = ( $rc_type == RC_MOVE ) ? "1movedto2" : "1movedto2_redir";
 519                         $clink = wfMsg( $msg, $this->skin->linkKnown( $rc->getTitle(), null,
 520                                 array(), array( 'redirect' => 'no' ) ),
 521                                 $this->skin->linkKnown( $rc->getMovedToTitle() ) );
 522                 // New unpatrolled pages
 523                 } else if( $rc->unpatrolled && $rc_type == RC_NEW ) {
 524                         $clink = $this->skin->linkKnown( $rc->getTitle(), null, array(),
 525                                 array( 'rcid' => $rc_id ) );
 526                 // Log entries
 527                 } else if( $rc_type == RC_LOG ) {
 528                         if( $rc_log_type ) {
 529                                 $logtitle = SpecialPage::getTitleFor( 'Log', $rc_log_type );
 530                                 $clink = '(' . $this->skin->linkKnown( $logtitle,
 531                                         LogPage::logName($rc_log_type) ) . ')';
 532                         } else {
 533                                 $clink = $this->skin->link( $rc->getTitle() );
 534                         }
 535                         $watched = false;
 536                 // Log entries (old format) and special pages
 537                 } elseif( $rc_namespace == NS_SPECIAL ) {
 538                         list( $specialName, $logtype ) = SpecialPage::resolveAliasWithSubpage( $rc_title );
 539                         if ( $specialName == 'Log' ) {
 540                                 # Log updates, etc
 541                                 $logname = LogPage::logName( $logtype );
 542                                 $clink = '(' . $this->skin->linkKnown( $rc->getTitle(), $logname ) . ')';
 543                         } else {
 544                                 wfDebug( "Unexpected special page in recentchanges\n" );
 545                                 $clink = '';
 546                         }
 547                 // Edits
 548                 } else {
 549                         $clink = $this->skin->linkKnown( $rc->getTitle() );
 550                 }
 551
 552                 # Don't show unusable diff links
 553                 if ( !ChangesList::userCan($rc,Revision::DELETED_TEXT) ) {
 554                         $showdifflinks = false;
 555                 }
 556
 557                 $time = $wgLang->time( $rc_timestamp, true, true );
 558                 $rc->watched = $watched;
 559                 $rc->link = $clink;
 560                 $rc->timestamp = $time;
 561                 $rc->numberofWatchingusers = $baseRC->numberofWatchingusers;
 562
 563                 # Make "cur" and "diff" links.  Don't use link(), it's too slow if
 564                 # called too many times (50% of CPU time on RecentChanges!).
 565                 if( $rc->unpatrolled ) {
 566                         $rcIdQuery = array( 'rcid' => $rc_id );
 567                 } else {
 568                         $rcIdQuery = array();
 569                 }
 570                 $querycur = $curIdEq + array( 'diff' => '0', 'oldid' => $rc_this_oldid );
 571                 $querydiff = $curIdEq + array( 'diff' => $rc_this_oldid, 'oldid' =>
 572                         $rc_last_oldid ) + $rcIdQuery;
 573
 574                 if( !$showdifflinks ) {
 575                         $curLink = $this->message['cur'];
 576                         $diffLink = $this->message['diff'];
 577                 } else if( in_array( $rc_type, array(RC_NEW,RC_LOG,RC_MOVE,RC_MOVE_OVER_REDIRECT) ) ) {
 578                         if ( $rc_type != RC_NEW ) {
 579                                 $curLink = $this->message['cur'];
 580                         } else {
 581                                 $curUrl = htmlspecialchars( $rc->getTitle()->getLinkUrl( $querycur ) );
 582                                 $curLink = "<a href=\"$curUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['cur']}</a>";
 583                         }
 584                         $diffLink = $this->message['diff'];
 585                 } else {
 586                         $diffUrl = htmlspecialchars( $rc->getTitle()->getLinkUrl( $querydiff ) );
 587                         $curUrl = htmlspecialchars( $rc->getTitle()->getLinkUrl( $querycur ) );
 588                         $diffLink = "<a href=\"$diffUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['diff']}</a>";
 589                         $curLink = "<a href=\"$curUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['cur']}</a>";
 590                 }
 591
 592                 # Make "last" link
 593                 if( !$showdifflinks || !$rc_last_oldid ) {
 594                     $lastLink = $this->message['last'];
 595                 } else if( $rc_type == RC_LOG || $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 596                         $lastLink = $this->message['last'];
 597                 } else {
 598                         $lastLink = $this->skin->linkKnown( $rc->getTitle(), $this->message['last'],
 599                                 array(), $curIdEq + array('diff' => $rc_this_oldid, 'oldid' => $rc_last_oldid) + $rcIdQuery );
 600                 }
 601
 602                 # Make user links
 603                 if( $this->isDeleted($rc,Revision::DELETED_USER) ) {
 604                         $rc->userlink = ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 605                 } else {
 606                         $rc->userlink = $this->skin->userLink( $rc_user, $rc_user_text );
 607                         $rc->usertalklink = $this->skin->userToolLinks( $rc_user, $rc_user_text );
 608                 }
 609
 610                 $rc->lastlink = $lastLink;
 611                 $rc->curlink  = $curLink;
 612                 $rc->difflink = $diffLink;
 613
 614                 # Put accumulated information into the cache, for later display
 615                 # Page moves go on their own line
 616                 $title = $rc->getTitle();
 617                 $secureName = $title->getPrefixedDBkey();
 618                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 619                         # Use an @ character to prevent collision with page names
 620                         $this->rc_cache['@@' . ($this->rcMoveIndex++)] = array($rc);
 621                 } else {
 622                         # Logs are grouped by type
 623                         if( $rc_type == RC_LOG ){
 624                                 $secureName = SpecialPage::getTitleFor( 'Log', $rc_log_type )->getPrefixedDBkey();
 625                         }
 626                         if( !isset( $this->rc_cache[$secureName] ) ) {
 627                                 $this->rc_cache[$secureName] = array();
 628                         }
 629
 630                         array_push( $this->rc_cache[$secureName], $rc );
 631                 }
 632
 633                 wfProfileOut( __METHOD__ );
 634
 635                 return $ret;
 636         }
 637
 638         /**
 639          * Enhanced RC group
 640          */
 641         protected function recentChangesBlockGroup( $block ) {
 642                 global $wgLang, $wgContLang, $wgRCShowChangedSize;
 643
 644                 wfProfileIn( __METHOD__ );
 645
 646                 $r = '<table cellpadding="0" cellspacing="0" border="0" style="background: none"><tr>';
 647
 648                 # Collate list of users
 649                 $userlinks = array();
 650                 # Other properties
 651                 $unpatrolled = false;
 652                 $isnew = false;
 653                 $curId = $currentRevision = 0;
 654                 # Some catalyst variables...
 655                 $namehidden = true;
 656                 $allLogs = true;
 657                 foreach( $block as $rcObj ) {
 658                         $oldid = $rcObj->mAttribs['rc_last_oldid'];
 659                         if( $rcObj->mAttribs['rc_new'] ) {
 660                                 $isnew = true;
 661                         }
 662                         // If all log actions to this page were hidden, then don't
 663                         // give the name of the affected page for this block!
 664                         if( !$this->isDeleted( $rcObj, LogPage::DELETED_ACTION ) ) {
 665                                 $namehidden = false;
 666                         }
 667                         $u = $rcObj->userlink;
 668                         if( !isset( $userlinks[$u] ) ) {
 669                                 $userlinks[$u] = 0;
 670                         }
 671                         if( $rcObj->unpatrolled ) {
 672                                 $unpatrolled = true;
 673                         }
 674                         if( $rcObj->mAttribs['rc_type'] != RC_LOG ) {
 675                                 $allLogs = false;
 676                         }
 677                         # Get the latest entry with a page_id and oldid
 678                         # since logs may not have these.
 679                         if( !$curId && $rcObj->mAttribs['rc_cur_id'] ) {
 680                                 $curId = $rcObj->mAttribs['rc_cur_id'];
 681                         }
 682                         if( !$currentRevision && $rcObj->mAttribs['rc_this_oldid'] ) {
 683                                 $currentRevision = $rcObj->mAttribs['rc_this_oldid'];
 684                         }
 685
 686                         $bot = $rcObj->mAttribs['rc_bot'];
 687                         $userlinks[$u]++;
 688                 }
 689
 690                 # Sort the list and convert to text
 691                 krsort( $userlinks );
 692                 asort( $userlinks );
 693                 $users = array();
 694                 foreach( $userlinks as $userlink => $count) {
 695                         $text = $userlink;
 696                         $text .= $wgContLang->getDirMark();
 697                         if( $count > 1 ) {
 698                                 $text .= ' (' . $wgLang->formatNum( $count ) . '×)';
 699                         }
 700                         array_push( $users, $text );
 701                 }
 702
 703                 $users = ' <span class="changedby">[' .
 704                         implode( $this->message['semicolon-separator'], $users ) . ']</span>';
 705
 706                 # ID for JS visibility toggle
 707                 $jsid = $this->rcCacheIndex;
 708                 # onclick handler to toggle hidden/expanded
 709                 $toggleLink = "onclick='toggleVisibility($jsid); return false'";
 710                 # Title for <a> tags
 711                 $expandTitle = htmlspecialchars( wfMsg( 'rc-enhanced-expand' ) );
 712                 $closeTitle = htmlspecialchars( wfMsg( 'rc-enhanced-hide' ) );
 713
 714                 $tl = "<span id='mw-rc-openarrow-$jsid' class='mw-changeslist-expanded' style='visibility:hidden'><a href='#' $toggleLink title='$expandTitle'>" . $this->sideArrow() . "</a></span>";
 715                 $tl .= "<span id='mw-rc-closearrow-$jsid' class='mw-changeslist-hidden' style='display:none'><a href='#' $toggleLink title='$closeTitle'>" . $this->downArrow() . "</a></span>";
 716                 $r .= '<td valign="top" style="white-space: nowrap"><tt>'.$tl.'&nbsp;';
 717
 718                 # Main line
 719                 $r .= $this->recentChangesFlags( $isnew, false, $unpatrolled, '&nbsp;', $bot );
 720
 721                 # Timestamp
 722                 $r .= '&nbsp;'.$block[0]->timestamp.'&nbsp;</tt></td><td>';
 723
 724                 # Article link
 725                 if( $namehidden ) {
 726                         $r .= ' <span class="history-deleted">' . wfMsgHtml( 'rev-deleted-event' ) . '</span>';
 727                 } else if( $allLogs ) {
 728                         $r .= $this->maybeWatchedLink( $block[0]->link, $block[0]->watched );
 729                 } else {
 730                         $this->insertArticleLink( $r, $block[0], $block[0]->unpatrolled, $block[0]->watched );
 731                 }
 732
 733                 $r .= $wgContLang->getDirMark();
 734
 735                 $curIdEq = 'curid=' . $curId;
 736                 # Changes message
 737                 $n = count($block);
 738                 static $nchanges = array();
 739                 if ( !isset( $nchanges[$n] ) ) {
 740                         $nchanges[$n] = wfMsgExt( 'nchanges', array( 'parsemag', 'escape' ), $wgLang->formatNum( $n ) );
 741                 }
 742                 # Total change link
 743                 $r .= ' ';
 744                 if( !$allLogs ) {
 745                         $r .= '(';
 746                         if( !ChangesList::userCan( $rcObj, Revision::DELETED_TEXT ) ) {
 747                                 $r .= $nchanges[$n];
 748                         } else if( $isnew ) {
 749                                 $r .= $nchanges[$n];
 750                         } else {
 751                                 $r .= $this->skin->makeKnownLinkObj( $block[0]->getTitle(),
 752                                         $nchanges[$n], $curIdEq."&diff=$currentRevision&oldid=$oldid" );
 753                         }
 754                 }
 755
 756                 # History
 757                 if( $allLogs ) {
 758                         // don't show history link for logs
 759                 } else if( $namehidden || !$block[0]->getTitle()->exists() ) {
 760                         $r .= $this->message['semicolon-separator'] . $this->message['hist'] . ')';
 761                 } else {
 762                         $r .= $this->message['semicolon-separator'] . $this->skin->makeKnownLinkObj( $block[0]->getTitle(),
 763                                 $this->message['hist'], $curIdEq . '&action=history' ) . ')';
 764                 }
 765                 $r .= ' . . ';
 766
 767                 # Character difference (does not apply if only log items)
 768                 if( $wgRCShowChangedSize && !$allLogs ) {
 769                         $last = 0;
 770                         $first = count($block) - 1;
 771                         # Some events (like logs) have an "empty" size, so we need to skip those...
 772                         while( $last < $first && $block[$last]->mAttribs['rc_new_len'] === NULL ) {
 773                                 $last++;
 774                         }
 775                         while( $first > $last && $block[$first]->mAttribs['rc_old_len'] === NULL ) {
 776                                 $first--;
 777                         }
 778                         # Get net change
 779                         $chardiff = $rcObj->getCharacterDifference( $block[$first]->mAttribs['rc_old_len'],
 780                                 $block[$last]->mAttribs['rc_new_len'] );
 781
 782                         if( $chardiff == '' ) {
 783                                 $r .= ' ';
 784                         } else {
 785                                 $r .= ' ' . $chardiff. ' . . ';
 786                         }
 787                 }
 788
 789                 $r .= $users;
 790                 $r .= $this->numberofWatchingusers($block[0]->numberofWatchingusers);
 791
 792                 $r .= "</td></tr></table>\n";
 793
 794                 # Sub-entries
 795                 $r .= '<div id="mw-rc-subentries-'.$jsid.'" class="mw-changeslist-hidden">';
 796                 $r .= '<table cellpadding="0" cellspacing="0"  border="0" style="background: none">';
 797                 foreach( $block as $rcObj ) {
 798                         # Extract fields from DB into the function scope (rc_xxxx variables)
 799                         // FIXME: Would be good to replace this extract() call with something
 800                         // that explicitly initializes variables.
 801                         # Classes to apply -- TODO implement
 802                         $classes = array();
 803                         extract( $rcObj->mAttribs );
 804
 805                         #$r .= '<tr><td valign="top">'.$this->spacerArrow();
 806                         $r .= '<tr><td valign="top">';
 807                         $r .= '<tt>'.$this->spacerIndent() . $this->spacerIndent();
 808                         $r .= $this->recentChangesFlags( $rc_new, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot );
 809                         $r .= '&nbsp;</tt></td><td valign="top">';
 810
 811                         $o = '';
 812                         if( $rc_this_oldid != 0 ) {
 813                                 $o = 'oldid='.$rc_this_oldid;
 814                         }
 815                         # Log timestamp
 816                         if( $rc_type == RC_LOG ) {
 817                                 $link = '<tt>'.$rcObj->timestamp.'</tt> ';
 818                         # Revision link
 819                         } else if( !ChangesList::userCan($rcObj,Revision::DELETED_TEXT) ) {
 820                                 $link = '<span class="history-deleted"><tt>'.$rcObj->timestamp.'</tt></span> ';
 821                         } else {
 822                                 $rcIdEq = ($rcObj->unpatrolled && $rc_type == RC_NEW) ?
 823                                         '&rcid='.$rcObj->mAttribs['rc_id'] : '';
 824                                 $link = '<tt>'.$this->skin->makeKnownLinkObj( $rcObj->getTitle(),
 825                                         $rcObj->timestamp, $curIdEq.'&'.$o.$rcIdEq ).'</tt>';
 826                                 if( $this->isDeleted($rcObj,Revision::DELETED_TEXT) )
 827                                         $link = '<span class="history-deleted">'.$link.'</span> ';
 828                         }
 829                         $r .= $link;
 830
 831                         if ( !$rc_type == RC_LOG || $rc_type == RC_NEW ) {
 832                                 $r .= ' (';
 833                                 $r .= $rcObj->curlink;
 834                                 $r .= $this->message['semicolon-separator'];
 835                                 $r .= $rcObj->lastlink;
 836                                 $r .= ')';
 837                         }
 838                         $r .= ' . . ';
 839
 840                         # Character diff
 841                         if( $wgRCShowChangedSize ) {
 842                                 $r .= ( $rcObj->getCharacterDifference() == '' ? '' : $rcObj->getCharacterDifference() . ' . . ' ) ;
 843                         }
 844                         # User links
 845                         $r .= $rcObj->userlink;
 846                         $r .= $rcObj->usertalklink;
 847                         // log action
 848                         $this->insertAction( $r, $rcObj );
 849                         // log comment
 850                         $this->insertComment( $r, $rcObj );
 851                         # Rollback
 852                         $this->insertRollback( $r, $rcObj );
 853                         # Tags
 854                         $this->insertTags( $r, $rcObj, $classes );
 855
 856                         # Mark revision as deleted
 857                         if( !$rc_log_type && $this->isDeleted($rcObj,Revision::DELETED_TEXT) ) {
 858                                 $r .= ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 859                         }
 860
 861                         $r .= "</td></tr>\n";
 862                 }
 863                 $r .= "</table></div>\n";
 864
 865                 $this->rcCacheIndex++;
 866
 867                 wfProfileOut( __METHOD__ );
 868
 869                 return $r;
 870         }
 871
 872         /**
 873          * Generate HTML for an arrow or placeholder graphic
 874          * @param string $dir one of '', 'd', 'l', 'r'
 875          * @param string $alt text
 876          * @param string $title text
 877          * @return string HTML <img> tag
 878          */
 879         protected function arrow( $dir, $alt='', $title='' ) {
 880                 global $wgStylePath;
 881                 $encUrl = htmlspecialchars( $wgStylePath . '/common/images/Arr_' . $dir . '.png' );
 882                 $encAlt = htmlspecialchars( $alt );
 883                 $encTitle = htmlspecialchars( $title );
 884                 return "<img src=\"$encUrl\" width=\"12\" height=\"12\" alt=\"$encAlt\" title=\"$encTitle\" />";
 885         }
 886
 887         /**
 888          * Generate HTML for a right- or left-facing arrow,
 889          * depending on language direction.
 890          * @return string HTML <img> tag
 891          */
 892         protected function sideArrow() {
 893                 global $wgContLang;
 894                 $dir = $wgContLang->isRTL() ? 'l' : 'r';
 895                 return $this->arrow( $dir, '+', wfMsg( 'rc-enhanced-expand' ) );
 896         }
 897
 898         /**
 899          * Generate HTML for a down-facing arrow
 900          * depending on language direction.
 901          * @return string HTML <img> tag
 902          */
 903         protected function downArrow() {
 904                 return $this->arrow( 'd', '-', wfMsg( 'rc-enhanced-hide' ) );
 905         }
 906
 907         /**
 908          * Generate HTML for a spacer image
 909          * @return string HTML <img> tag
 910          */
 911         protected function spacerArrow() {
 912                 return $this->arrow( '', codepointToUtf8( 0xa0 ) ); // non-breaking space
 913         }
 914
 915         /**
 916          * Add a set of spaces
 917          * @return string HTML <td> tag
 918          */
 919         protected function spacerIndent() {
 920                 return '&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;';
 921         }
 922
 923         /**
 924          * Enhanced RC ungrouped line.
 925          * @return string a HTML formated line (generated using $r)
 926          */
 927         protected function recentChangesBlockLine( $rcObj ) {
 928                 global $wgRCShowChangedSize;
 929
 930                 wfProfileIn( __METHOD__ );
 931
 932                 # Extract fields from DB into the function scope (rc_xxxx variables)
 933                 // FIXME: Would be good to replace this extract() call with something
 934                 // that explicitly initializes variables.
 935                 $classes = array(); // TODO implement
 936                 extract( $rcObj->mAttribs );
 937                 $curIdEq = "curid={$rc_cur_id}";
 938
 939                 $r = '<table cellspacing="0" cellpadding="0" border="0" style="background: none"><tr>';
 940                 $r .= '<td valign="top" style="white-space: nowrap"><tt>' . $this->spacerArrow() . '&nbsp;';
 941                 # Flag and Timestamp
 942                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 943                         $r .= '&nbsp;&nbsp;&nbsp;&nbsp;'; // 4 flags -> 4 spaces
 944                 } else {
 945                         $r .= $this->recentChangesFlags( $rc_type == RC_NEW, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot );
 946                 }
 947                 $r .= '&nbsp;'.$rcObj->timestamp.'&nbsp;</tt></td><td>';
 948                 # Article or log link
 949                 if( $rc_log_type ) {
 950                         $logtitle = Title::newFromText( "Log/$rc_log_type", NS_SPECIAL );
 951                         $logname = LogPage::logName( $rc_log_type );
 952                         $r .= '(' . $this->skin->makeKnownLinkObj($logtitle, $logname ) . ')';
 953                 } else {
 954                         $this->insertArticleLink( $r, $rcObj, $rcObj->unpatrolled, $rcObj->watched );
 955                 }
 956                 # Diff and hist links
 957                 if ( $rc_type != RC_LOG ) {
 958                         $r .= ' ('. $rcObj->difflink . $this->message['semicolon-separator'];
 959                         $r .= $this->skin->makeKnownLinkObj( $rcObj->getTitle(), $this->message['hist'],
 960                                 $curIdEq.'&action=history' ) . ')';
 961                 }
 962                 $r .= ' . . ';
 963                 # Character diff
 964                 if( $wgRCShowChangedSize && ($cd = $rcObj->getCharacterDifference()) ) {
 965                         $r .= "$cd . . ";
 966                 }
 967                 # User/talk
 968                 $r .= ' '.$rcObj->userlink . $rcObj->usertalklink;
 969                 # Log action (if any)
 970                 if( $rc_log_type ) {
 971                         if( $this->isDeleted($rcObj,LogPage::DELETED_ACTION) ) {
 972                                 $r .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 973                         } else {
 974                                 $r .= ' ' . LogPage::actionText( $rc_log_type, $rc_log_action, $rcObj->getTitle(),
 975                                         $this->skin, LogPage::extractParams($rc_params), true, true );
 976                         }
 977                 }
 978                 $this->insertComment( $r, $rcObj );
 979                 $this->insertRollback( $r, $rcObj );
 980                 # Tags
 981                 $this->insertTags( $r, $rcObj, $classes );
 982                 # Show how many people are watching this if enabled
 983                 $r .= $this->numberofWatchingusers($rcObj->numberofWatchingusers);
 984
 985                 $r .= "</td></tr></table>\n";
 986
 987                 wfProfileOut( __METHOD__ );
 988
 989                 return $r;
 990         }
 991
 992         /**
 993          * If enhanced RC is in use, this function takes the previously cached
 994          * RC lines, arranges them, and outputs the HTML
 995          */
 996         protected function recentChangesBlock() {
 997                 if( count ( $this->rc_cache ) == 0 ) {
 998                         return '';
 999                 }
1000
1001                 wfProfileIn( __METHOD__ );
1002
1003                 $blockOut = '';
1004                 foreach( $this->rc_cache as $block ) {
1005                         if( count( $block ) < 2 ) {
1006                                 $blockOut .= $this->recentChangesBlockLine( array_shift( $block ) );
1007                         } else {
1008                                 $blockOut .= $this->recentChangesBlockGroup( $block );
1009                         }
1010                 }
1011
1012                 wfProfileOut( __METHOD__ );
1013
1014                 return '<div>'.$blockOut.'</div>';
1015         }
1016
1017         /**
1018          * Returns text for the end of RC
1019          * If enhanced RC is in use, returns pretty much all the text
1020          */
1021         public function endRecentChangesList() {
1022                 return $this->recentChangesBlock() . parent::endRecentChangesList();
1023         }
1024
1025 }