includes/ChangesList.php

   1 <?php
   2
   3 /**
   4  * @todo document
   5  */
   6 class RCCacheEntry extends RecentChange
   7 {
   8         var $secureName, $link;
   9         var $curlink , $difflink, $lastlink , $usertalklink , $versionlink ;
  10         var $userlink, $timestamp, $watched;
  11
  12         function newFromParent( $rc ) {
  13                 $rc2 = new RCCacheEntry;
  14                 $rc2->mAttribs = $rc->mAttribs;
  15                 $rc2->mExtra = $rc->mExtra;
  16                 return $rc2;
  17         }
  18 } ;
  19
  20 /**
  21  * Class to show various lists of changes:
  22  * - what links here
  23  * - related changes
  24  * - recent changes
  25  */
  26 class ChangesList {
  27         # Called by history lists and recent changes
  28         #
  29
  30         /** @todo document */
  31         function __construct( &$skin ) {
  32                 $this->skin =& $skin;
  33                 $this->preCacheMessages();
  34         }
  35
  36         /**
  37          * Fetch an appropriate changes list class for the specified user
  38          * Some users might want to use an enhanced list format, for instance
  39          *
  40          * @param $user User to fetch the list class for
  41          * @return ChangesList derivative
  42          */
  43         public static function newFromUser( &$user ) {
  44                 $sk = $user->getSkin();
  45                 $list = NULL;
  46                 if( wfRunHooks( 'FetchChangesList', array( &$user, &$sk, &$list ) ) ) {
  47                         return $user->getOption( 'usenewrc' ) ? new EnhancedChangesList( $sk ) : new OldChangesList( $sk );
  48                 } else {
  49                         return $list;
  50                 }
  51         }
  52
  53         /**
  54          * As we use the same small set of messages in various methods and that
  55          * they are called often, we call them once and save them in $this->message
  56          */
  57         function preCacheMessages() {
  58                 // Precache various messages
  59                 if( !isset( $this->message ) ) {
  60                         foreach( explode(' ', 'cur diff hist minoreditletter newpageletter last '.
  61                                 'blocklink history boteditletter' ) as $msg ) {
  62                                 $this->message[$msg] = wfMsgExt( $msg, array( 'escape') );
  63                         }
  64                 }
  65         }
  66
  67
  68         /**
  69          * Returns the appropriate flags for new page, minor change and patrolling
  70          */
  71         function recentChangesFlags( $new, $minor, $patrolled, $nothing = '&nbsp;', $bot = false ) {
  72                 $f = $new ? '<span class="newpage">' . $this->message['newpageletter'] . '</span>'
  73                                 : $nothing;
  74                 $f .= $minor ? '<span class="minor">' . $this->message['minoreditletter'] . '</span>'
  75                                 : $nothing;
  76                 $f .= $bot ? '<span class="bot">' . $this->message['boteditletter'] . '</span>' : $nothing;
  77                 $f .= $patrolled ? '<span class="unpatrolled">!</span>' : $nothing;
  78                 return $f;
  79         }
  80
  81         /**
  82          * Returns text for the start of the tabular part of RC
  83          */
  84         function beginRecentChangesList() {
  85                 $this->rc_cache = array();
  86                 $this->rcMoveIndex = 0;
  87                 $this->rcCacheIndex = 0;
  88                 $this->lastdate = '';
  89                 $this->rclistOpen = false;
  90                 return '';
  91         }
  92
  93         /**
  94          * Returns text for the end of RC
  95          */
  96         function endRecentChangesList() {
  97                 if( $this->rclistOpen ) {
  98                         return "</ul>\n";
  99                 } else {
 100                         return '';
 101                 }
 102         }
 103
 104
 105         function insertMove( &$s, $rc ) {
 106                 # Diff
 107                 $s .= '(' . $this->message['diff'] . ') (';
 108                 # Hist
 109                 $s .= $this->skin->makeKnownLinkObj( $rc->getMovedToTitle(), $this->message['hist'], 'action=history' ) .
 110                         ') . . ';
 111
 112                 # "[[x]] moved to [[y]]"
 113                 $msg = ( $rc->mAttribs['rc_type'] == RC_MOVE ) ? '1movedto2' : '1movedto2_redir';
 114                 $s .= wfMsg( $msg, $this->skin->makeKnownLinkObj( $rc->getTitle(), '', 'redirect=no' ),
 115                         $this->skin->makeKnownLinkObj( $rc->getMovedToTitle(), '' ) );
 116         }
 117
 118         function insertDateHeader(&$s, $rc_timestamp) {
 119                 global $wgLang;
 120
 121                 # Make date header if necessary
 122                 $date = $wgLang->date( $rc_timestamp, true, true );
 123                 $s = '';
 124                 if( $date != $this->lastdate ) {
 125                         if( '' != $this->lastdate ) {
 126                                 $s .= "</ul>\n";
 127                         }
 128                         $s .= '<h4>'.$date."</h4>\n<ul class=\"special\">";
 129                         $this->lastdate = $date;
 130                         $this->rclistOpen = true;
 131                 }
 132         }
 133
 134         function insertLog(&$s, $title, $logtype) {
 135                 $logname = LogPage::logName( $logtype );
 136                 $s .= '(' . $this->skin->makeKnownLinkObj($title, $logname ) . ')';
 137         }
 138
 139
 140         function insertDiffHist(&$s, &$rc, $unpatrolled) {
 141                 # Diff link
 142                 if( $rc->mAttribs['rc_type'] == RC_NEW || $rc->mAttribs['rc_type'] == RC_LOG ) {
 143                         $diffLink = $this->message['diff'];
 144                 } else {
 145                         $rcidparam = $unpatrolled
 146                                 ? array( 'rcid' => $rc->mAttribs['rc_id'] )
 147                                 : array();
 148                         $diffLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['diff'],
 149                                 wfArrayToCGI( array(
 150                                         'curid' => $rc->mAttribs['rc_cur_id'],
 151                                         'diff'  => $rc->mAttribs['rc_this_oldid'],
 152                                         'oldid' => $rc->mAttribs['rc_last_oldid'] ),
 153                                         $rcidparam ),
 154                                 '', '', ' tabindex="'.$rc->counter.'"');
 155                 }
 156                 $s .= '('.$diffLink.') (';
 157
 158                 # History link
 159                 $s .= $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['hist'],
 160                         wfArrayToCGI( array(
 161                                 'curid' => $rc->mAttribs['rc_cur_id'],
 162                                 'action' => 'history' ) ) );
 163                 $s .= ') . . ';
 164         }
 165
 166         function insertArticleLink(&$s, &$rc, $unpatrolled, $watched) {
 167                 # Article link
 168                 # If it's a new article, there is no diff link, but if it hasn't been
 169                 # patrolled yet, we need to give users a way to do so
 170                 $params = ( $unpatrolled && $rc->mAttribs['rc_type'] == RC_NEW )
 171                         ? 'rcid='.$rc->mAttribs['rc_id']
 172                         : '';
 173                 $articlelink = ' '. $this->skin->makeKnownLinkObj( $rc->getTitle(), '', $params );
 174                 if($watched) $articlelink = '<strong>'.$articlelink.'</strong>';
 175                 global $wgContLang;
 176                 $articlelink .= $wgContLang->getDirMark();
 177
 178                 $s .= ' '.$articlelink;
 179         }
 180
 181         function insertTimestamp(&$s, $rc) {
 182                 global $wgLang;
 183                 # Timestamp
 184                 $s .= '; ' . $wgLang->time( $rc->mAttribs['rc_timestamp'], true, true ) . ' . . ';
 185         }
 186
 187         /** Insert links to user page, user talk page and eventually a blocking link */
 188         function insertUserRelatedLinks(&$s, &$rc) {
 189                 $s .= $this->skin->userLink( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 190                 $s .= $this->skin->userToolLinks( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 191         }
 192
 193         /** insert a formatted comment */
 194         function insertComment(&$s, &$rc) {
 195                 # Add comment
 196                 if( $rc->mAttribs['rc_type'] != RC_MOVE && $rc->mAttribs['rc_type'] != RC_MOVE_OVER_REDIRECT ) {
 197                         $s .= $this->skin->commentBlock( $rc->mAttribs['rc_comment'], $rc->getTitle() );
 198                 }
 199         }
 200
 201         /**
 202          * Check whether to enable recent changes patrol features
 203          * @return bool
 204          */
 205         function usePatrol() {
 206                 global $wgUseRCPatrol, $wgUser;
 207                 return( $wgUseRCPatrol && $wgUser->isAllowed( 'patrol' ) );
 208         }
 209
 210         /**
 211          * Returns the string which indicates the number of watching users
 212          */
 213         function numberofWatchingusers( $count ) {
 214                 global $wgLang;
 215                 static $cache = array();
 216                 if ( $count > 0 ) {
 217                         if ( !isset( $cache[$count] ) ) {
 218                                 $cache[$count] = wfMsgExt('number_of_watching_users_RCview',
 219                                         array('parsemag', 'escape'), $wgLang->formatNum($count));
 220                         }
 221                         return $cache[$count];
 222                 } else {
 223                         return '';
 224                 }
 225         }
 226 }
 227
 228
 229 /**
 230  * Generate a list of changes using the good old system (no javascript)
 231  */
 232 class OldChangesList extends ChangesList {
 233         /**
 234          * Format a line using the old system (aka without any javascript).
 235          */
 236         function recentChangesLine( &$rc, $watched = false ) {
 237                 global $wgContLang, $wgRCShowChangedSize;
 238
 239                 $fname = 'ChangesList::recentChangesLineOld';
 240                 wfProfileIn( $fname );
 241
 242                 # Extract DB fields into local scope
 243                 // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables.
 244                 extract( $rc->mAttribs );
 245
 246                 # Should patrol-related stuff be shown?
 247                 $unpatrolled = $this->usePatrol() && $rc_patrolled == 0;
 248
 249                 $this->insertDateHeader($s,$rc_timestamp);
 250
 251                 $s .= '<li>';
 252
 253                 // moved pages
 254                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 255                         $this->insertMove( $s, $rc );
 256                 // log entries
 257                 } elseif ( $rc_namespace == NS_SPECIAL ) {
 258                         list( $specialName, $specialSubpage ) = SpecialPage::resolveAliasWithSubpage( $rc_title );
 259                         if ( $specialName == 'Log' ) {
 260                                 $this->insertLog( $s, $rc->getTitle(), $specialSubpage );
 261                         } else {
 262                                 wfDebug( "Unexpected special page in recentchanges\n" );
 263                         }
 264                 // all other stuff
 265                 } else {
 266                         wfProfileIn($fname.'-page');
 267
 268                         $this->insertDiffHist($s, $rc, $unpatrolled);
 269
 270                         # M, N, b and ! (minor, new, bot and unpatrolled)
 271                         $s .= ' ' . $this->recentChangesFlags( $rc_type == RC_NEW, $rc_minor, $unpatrolled, '', $rc_bot );
 272                         $this->insertArticleLink($s, $rc, $unpatrolled, $watched);
 273
 274                         wfProfileOut($fname.'-page');
 275                 }
 276
 277                 wfProfileIn( $fname.'-rest' );
 278
 279                 $this->insertTimestamp($s,$rc);
 280
 281                 if( $wgRCShowChangedSize ) {
 282                         $s .= ( $rc->getCharacterDifference() == '' ? '' : $rc->getCharacterDifference() . ' . . ' );
 283                 }
 284
 285                 $this->insertUserRelatedLinks($s,$rc);
 286                 $this->insertComment($s, $rc);
 287
 288                 $s .=  rtrim(' ' . $this->numberofWatchingusers($rc->numberofWatchingusers));
 289
 290                 $s .= "</li>\n";
 291
 292                 wfProfileOut( $fname.'-rest' );
 293
 294                 wfProfileOut( $fname );
 295                 return $s;
 296         }
 297 }
 298
 299
 300 /**
 301  * Generate a list of changes using an Enhanced system (use javascript).
 302  */
 303 class EnhancedChangesList extends ChangesList {
 304         /**
 305          * Format a line for enhanced recentchange (aka with javascript and block of lines).
 306          */
 307         function recentChangesLine( &$baseRC, $watched = false ) {
 308                 global $wgLang, $wgContLang;
 309
 310                 # Create a specialised object
 311                 $rc = RCCacheEntry::newFromParent( $baseRC );
 312
 313                 # Extract fields from DB into the function scope (rc_xxxx variables)
 314                 // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables.
 315                 extract( $rc->mAttribs );
 316                 $curIdEq = 'curid=' . $rc_cur_id;
 317
 318                 # If it's a new day, add the headline and flush the cache
 319                 $date = $wgLang->date( $rc_timestamp, true);
 320                 $ret = '';
 321                 if( $date != $this->lastdate ) {
 322                         # Process current cache
 323                         $ret = $this->recentChangesBlock();
 324                         $this->rc_cache = array();
 325                         $ret .= "<h4>{$date}</h4>\n";
 326                         $this->lastdate = $date;
 327                 }
 328
 329                 # Should patrol-related stuff be shown?
 330                 if( $this->usePatrol() ) {
 331                         $rc->unpatrolled = !$rc_patrolled;
 332                 } else {
 333                         $rc->unpatrolled = false;
 334                 }
 335
 336                 # Make article link
 337                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 338                         $msg = ( $rc_type == RC_MOVE ) ? "1movedto2" : "1movedto2_redir";
 339                         $clink = wfMsg( $msg, $this->skin->makeKnownLinkObj( $rc->getTitle(), '', 'redirect=no' ),
 340                           $this->skin->makeKnownLinkObj( $rc->getMovedToTitle(), '' ) );
 341                 } elseif( $rc_namespace == NS_SPECIAL ) {
 342                         list( $specialName, $logtype ) = SpecialPage::resolveAliasWithSubpage( $rc_title );
 343                         if ( $specialName == 'Log' ) {
 344                                 # Log updates, etc
 345                                 $logname = LogPage::logName( $logtype );
 346                                 $clink = '(' . $this->skin->makeKnownLinkObj( $rc->getTitle(), $logname ) . ')';
 347                         } else {
 348                                 wfDebug( "Unexpected special page in recentchanges\n" );
 349                                 $clink = '';
 350                         }
 351                 } elseif( $rc->unpatrolled && $rc_type == RC_NEW ) {
 352                         # Unpatrolled new page, give rc_id in query
 353                         $clink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '', "rcid={$rc_id}" );
 354                 } else {
 355                         $clink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '' );
 356                 }
 357
 358                 $time = $wgContLang->time( $rc_timestamp, true, true );
 359                 $rc->watched = $watched;
 360                 $rc->link = $clink;
 361                 $rc->timestamp = $time;
 362                 $rc->numberofWatchingusers = $baseRC->numberofWatchingusers;
 363
 364                 # Make "cur" and "diff" links
 365                 if( $rc->unpatrolled ) {
 366                         $rcIdQuery = "&rcid={$rc_id}";
 367                 } else {
 368                         $rcIdQuery = '';
 369                 }
 370                 $querycur = $curIdEq."&diff=0&oldid=$rc_this_oldid";
 371                 $querydiff = $curIdEq."&diff=$rc_this_oldid&oldid=$rc_last_oldid$rcIdQuery";
 372                 $aprops = ' tabindex="'.$baseRC->counter.'"';
 373                 $curLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['cur'], $querycur, '' ,'', $aprops );
 374                 if( $rc_type == RC_NEW || $rc_type == RC_LOG || $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 375                         if( $rc_type != RC_NEW ) {
 376                                 $curLink = $this->message['cur'];
 377                         }
 378                         $diffLink = $this->message['diff'];
 379                 } else {
 380                         $diffLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['diff'], $querydiff, '' ,'', $aprops );
 381                 }
 382
 383                 # Make "last" link
 384                 if( $rc_last_oldid == 0 || $rc_type == RC_LOG || $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 385                         $lastLink = $this->message['last'];
 386                 } else {
 387                         $lastLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['last'],
 388                           $curIdEq.'&diff='.$rc_this_oldid.'&oldid='.$rc_last_oldid . $rcIdQuery );
 389                 }
 390
 391                 $rc->userlink = $this->skin->userLink( $rc_user, $rc_user_text );
 392
 393                 $rc->lastlink = $lastLink;
 394                 $rc->curlink  = $curLink;
 395                 $rc->difflink = $diffLink;
 396
 397                 $rc->usertalklink = $this->skin->userToolLinks( $rc_user, $rc_user_text );
 398
 399                 # Put accumulated information into the cache, for later display
 400                 # Page moves go on their own line
 401                 $title = $rc->getTitle();
 402                 $secureName = $title->getPrefixedDBkey();
 403                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 404                         # Use an @ character to prevent collision with page names
 405                         $this->rc_cache['@@' . ($this->rcMoveIndex++)] = array($rc);
 406                 } else {
 407                         if( !isset ( $this->rc_cache[$secureName] ) ) {
 408                                 $this->rc_cache[$secureName] = array();
 409                         }
 410                         array_push( $this->rc_cache[$secureName], $rc );
 411                 }
 412                 return $ret;
 413         }
 414
 415         /**
 416          * Enhanced RC group
 417          */
 418         function recentChangesBlockGroup( $block ) {
 419                 global $wgLang, $wgContLang, $wgRCShowChangedSize;
 420                 $r = '';
 421
 422                 # Collate list of users
 423                 $isnew = false;
 424                 $unpatrolled = false;
 425                 $userlinks = array();
 426                 foreach( $block as $rcObj ) {
 427                         $oldid = $rcObj->mAttribs['rc_last_oldid'];
 428                         if( $rcObj->mAttribs['rc_new'] ) {
 429                                 $isnew = true;
 430                         }
 431                         $u = $rcObj->userlink;
 432                         if( !isset( $userlinks[$u] ) ) {
 433                                 $userlinks[$u] = 0;
 434                         }
 435                         if( $rcObj->unpatrolled ) {
 436                                 $unpatrolled = true;
 437                         }
 438                         $bot = $rcObj->mAttribs['rc_bot'];
 439                         $userlinks[$u]++;
 440                 }
 441
 442                 # Sort the list and convert to text
 443                 krsort( $userlinks );
 444                 asort( $userlinks );
 445                 $users = array();
 446                 foreach( $userlinks as $userlink => $count) {
 447                         $text = $userlink;
 448                         $text .= $wgContLang->getDirMark();
 449                         if( $count > 1 ) {
 450                                 $text .= ' ('.$count.'&times;)';
 451                         }
 452                         array_push( $users, $text );
 453                 }
 454
 455                 $users = ' <span class="changedby">['.implode('; ',$users).']</span>';
 456
 457                 # Arrow
 458                 $rci = 'RCI'.$this->rcCacheIndex;
 459                 $rcl = 'RCL'.$this->rcCacheIndex;
 460                 $rcm = 'RCM'.$this->rcCacheIndex;
 461                 $toggleLink = "javascript:toggleVisibility('$rci','$rcm','$rcl')";
 462                 $tl  = '<span id="'.$rcm.'"><a href="'.$toggleLink.'">' . $this->sideArrow() . '</a></span>';
 463                 $tl .= '<span id="'.$rcl.'" style="display:none"><a href="'.$toggleLink.'">' . $this->downArrow() . '</a></span>';
 464                 $r .= $tl;
 465
 466                 # Main line
 467                 $r .= '<tt>';
 468                 $r .= $this->recentChangesFlags( $isnew, false, $unpatrolled, '&nbsp;', $bot );
 469
 470                 # Timestamp
 471                 $r .= ' '.$block[0]->timestamp.' </tt>';
 472
 473                 # Article link
 474                 $r .= $this->maybeWatchedLink( $block[0]->link, $block[0]->watched );
 475                 $r .= $wgContLang->getDirMark();
 476
 477                 $curIdEq = 'curid=' . $block[0]->mAttribs['rc_cur_id'];
 478                 $currentRevision = $block[0]->mAttribs['rc_this_oldid'];
 479                 if( $block[0]->mAttribs['rc_type'] != RC_LOG ) {
 480                         # Changes
 481
 482                         $n = count($block);
 483                         static $nchanges = array();
 484                         if ( !isset( $nchanges[$n] ) ) {
 485                                 $nchanges[$n] = wfMsgExt( 'nchanges', array( 'parsemag', 'escape'),
 486                                         $wgLang->formatNum( $n ) );
 487                         }
 488
 489                         $r .= ' (';
 490
 491                         if( $isnew ) {
 492                                 $r .= $nchanges[$n];
 493                         } else {
 494                                 $r .= $this->skin->makeKnownLinkObj( $block[0]->getTitle(),
 495                                         $nchanges[$n], $curIdEq."&diff=$currentRevision&oldid=$oldid" );
 496                         }
 497
 498                         $r .= ') . . ';
 499
 500                         # Character difference
 501                         $chardiff = $rcObj->getCharacterDifference( $block[ count( $block ) - 1 ]->mAttribs['rc_old_len'],
 502                                         $block[0]->mAttribs['rc_new_len'] );
 503                         if( $chardiff == '' ) {
 504                                 $r .= ' (';
 505                         } else {
 506                                 $r .= ' ' . $chardiff. ' . . (';
 507                         }
 508
 509
 510                         # History
 511                         $r .= $this->skin->makeKnownLinkObj( $block[0]->getTitle(),
 512                                 $this->message['history'], $curIdEq.'&action=history' );
 513                         $r .= ')';
 514                 }
 515
 516                 $r .= $users;
 517
 518                 $r .= $this->numberofWatchingusers($block[0]->numberofWatchingusers);
 519                 $r .= "<br />\n";
 520
 521                 # Sub-entries
 522                 $r .= '<div id="'.$rci.'" style="display:none">';
 523                 foreach( $block as $rcObj ) {
 524                         # Get rc_xxxx variables
 525                         // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables.
 526                         extract( $rcObj->mAttribs );
 527
 528                         $r .= $this->spacerArrow();
 529                         $r .= '<tt>&nbsp; &nbsp; &nbsp; &nbsp;';
 530                         $r .= $this->recentChangesFlags( $rc_new, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot );
 531                         $r .= '&nbsp;</tt>';
 532
 533                         $o = '';
 534                         if( $rc_this_oldid != 0 ) {
 535                                 $o = 'oldid='.$rc_this_oldid;
 536                         }
 537                         if( $rc_type == RC_LOG ) {
 538                                 $link = $rcObj->timestamp;
 539                         } else {
 540                                 $link = $this->skin->makeKnownLinkObj( $rcObj->getTitle(), $rcObj->timestamp, $curIdEq.'&'.$o );
 541                         }
 542                         $link = '<tt>'.$link.'</tt>';
 543
 544                         $r .= $link;
 545                         $r .= ' (';
 546                         $r .= $rcObj->curlink;
 547                         $r .= '; ';
 548                         $r .= $rcObj->lastlink;
 549                         $r .= ') . . ';
 550
 551                         # Character diff
 552                         if( $wgRCShowChangedSize ) {
 553                                 $r .= ( $rcObj->getCharacterDifference() == '' ? '' : $rcObj->getCharacterDifference() . ' . . ' ) ;
 554                         }
 555
 556                         $r .= $rcObj->userlink;
 557                         $r .= $rcObj->usertalklink;
 558                         $r .= $this->skin->commentBlock( $rc_comment, $rcObj->getTitle() );
 559                         $r .= "<br />\n";
 560                 }
 561                 $r .= "</div>\n";
 562
 563                 $this->rcCacheIndex++;
 564                 return $r;
 565         }
 566
 567         function maybeWatchedLink( $link, $watched=false ) {
 568                 if( $watched ) {
 569                         // FIXME: css style might be more appropriate
 570                         return '<strong>' . $link . '</strong>';
 571                 } else {
 572                         return $link;
 573                 }
 574         }
 575
 576         /**
 577          * Generate HTML for an arrow or placeholder graphic
 578          * @param string $dir one of '', 'd', 'l', 'r'
 579          * @param string $alt text
 580          * @return string HTML <img> tag
 581          * @access private
 582          */
 583         function arrow( $dir, $alt='' ) {
 584                 global $wgStylePath;
 585                 $encUrl = htmlspecialchars( $wgStylePath . '/common/images/Arr_' . $dir . '.png' );
 586                 $encAlt = htmlspecialchars( $alt );
 587                 return "<img src=\"$encUrl\" width=\"12\" height=\"12\" alt=\"$encAlt\" />";
 588         }
 589
 590         /**
 591          * Generate HTML for a right- or left-facing arrow,
 592          * depending on language direction.
 593          * @return string HTML <img> tag
 594          * @access private
 595          */
 596         function sideArrow() {
 597                 global $wgContLang;
 598                 $dir = $wgContLang->isRTL() ? 'l' : 'r';
 599                 return $this->arrow( $dir, '+' );
 600         }
 601
 602         /**
 603          * Generate HTML for a down-facing arrow
 604          * depending on language direction.
 605          * @return string HTML <img> tag
 606          * @access private
 607          */
 608         function downArrow() {
 609                 return $this->arrow( 'd', '-' );
 610         }
 611
 612         /**
 613          * Generate HTML for a spacer image
 614          * @return string HTML <img> tag
 615          * @access private
 616          */
 617         function spacerArrow() {
 618                 return $this->arrow( '', ' ' );
 619         }
 620
 621         /**
 622          * Enhanced RC ungrouped line.
 623          * @return string a HTML formated line (generated using $r)
 624          */
 625         function recentChangesBlockLine( $rcObj ) {
 626                 global $wgContLang, $wgRCShowChangedSize;
 627
 628                 # Get rc_xxxx variables
 629                 // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables.
 630                 extract( $rcObj->mAttribs );
 631                 $curIdEq = 'curid='.$rc_cur_id;
 632
 633                 $r = '';
 634
 635                 # Spacer image
 636                 $r .= $this->spacerArrow();
 637
 638                 # Flag and Timestamp
 639                 $r .= '<tt>';
 640
 641                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 642                         $r .= '&nbsp;&nbsp;&nbsp;';
 643                 } else {
 644                         $r .= $this->recentChangesFlags( $rc_type == RC_NEW, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot );
 645                 }
 646                 $r .= ' '.$rcObj->timestamp.' </tt>';
 647
 648                 # Article link
 649                 $r .= $this->maybeWatchedLink( $rcObj->link, $rcObj->watched );
 650
 651                 # Diff
 652                 $r .= ' ('. $rcObj->difflink .'; ';
 653
 654                 # Hist
 655                 $r .= $this->skin->makeKnownLinkObj( $rcObj->getTitle(), wfMsg( 'hist' ), $curIdEq.'&action=history' ) . ') . . ';
 656
 657                 # Character diff
 658                 if( $wgRCShowChangedSize ) {
 659                         $r .= ( $rcObj->getCharacterDifference() == '' ? '' : '&nbsp;' . $rcObj->getCharacterDifference() . ' . . ' ) ;
 660                 }
 661
 662                 # User/talk
 663                 $r .= $rcObj->userlink . $rcObj->usertalklink;
 664
 665                 # Comment
 666                 if( $rc_type != RC_MOVE && $rc_type != RC_MOVE_OVER_REDIRECT ) {
 667                         $r .= $this->skin->commentBlock( $rc_comment, $rcObj->getTitle() );
 668                 }
 669
 670                 $r .= $this->numberofWatchingusers($rcObj->numberofWatchingusers);
 671
 672                 $r .= "<br />\n";
 673                 return $r;
 674         }
 675
 676         /**
 677          * If enhanced RC is in use, this function takes the previously cached
 678          * RC lines, arranges them, and outputs the HTML
 679          */
 680         function recentChangesBlock() {
 681                 if( count ( $this->rc_cache ) == 0 ) {
 682                         return '';
 683                 }
 684                 $blockOut = '';
 685                 foreach( $this->rc_cache as $block ) {
 686                         if( count( $block ) < 2 ) {
 687                                 $blockOut .= $this->recentChangesBlockLine( array_shift( $block ) );
 688                         } else {
 689                                 $blockOut .= $this->recentChangesBlockGroup( $block );
 690                         }
 691                 }
 692
 693                 return '<div>'.$blockOut.'</div>';
 694         }
 695
 696         /**
 697          * Returns text for the end of RC
 698          * If enhanced RC is in use, returns pretty much all the text
 699          */
 700         function endRecentChangesList() {
 701                 return $this->recentChangesBlock() . parent::endRecentChangesList();
 702         }
 703
 704 }
 705 ?>