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         static 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 )
 175                         $articlelink = "<strong class=\"mw-watched\">{$articlelink}</strong>";
 176                 global $wgContLang;
 177                 $articlelink .= $wgContLang->getDirMark();
 178
 179                 $s .= ' '.$articlelink;
 180         }
 181
 182         function insertTimestamp(&$s, $rc) {
 183                 global $wgLang;
 184                 # Timestamp
 185                 $s .= '; ' . $wgLang->time( $rc->mAttribs['rc_timestamp'], true, true ) . ' . . ';
 186         }
 187
 188         /** Insert links to user page, user talk page and eventually a blocking link */
 189         function insertUserRelatedLinks(&$s, &$rc) {
 190                 $s .= $this->skin->userLink( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 191                 $s .= $this->skin->userToolLinks( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 192         }
 193
 194         /** insert a formatted comment */
 195         function insertComment(&$s, &$rc) {
 196                 # Add comment
 197                 if( $rc->mAttribs['rc_type'] != RC_MOVE && $rc->mAttribs['rc_type'] != RC_MOVE_OVER_REDIRECT ) {
 198                         $s .= $this->skin->commentBlock( $rc->mAttribs['rc_comment'], $rc->getTitle() );
 199                 }
 200         }
 201
 202         /**
 203          * Check whether to enable recent changes patrol features
 204          * @return bool
 205          */
 206         function usePatrol() {
 207                 global $wgUseRCPatrol, $wgUser;
 208                 return( $wgUseRCPatrol && ($wgUser->isAllowed('patrol') || $wgUser->isAllowed('patrolmarks')) );
 209         }
 210
 211         /**
 212          * Returns the string which indicates the number of watching users
 213          */
 214         function numberofWatchingusers( $count ) {
 215                 global $wgLang;
 216                 static $cache = array();
 217                 if ( $count > 0 ) {
 218                         if ( !isset( $cache[$count] ) ) {
 219                                 $cache[$count] = wfMsgExt('number_of_watching_users_RCview',
 220                                         array('parsemag', 'escape'), $wgLang->formatNum($count));
 221                         }
 222                         return $cache[$count];
 223                 } else {
 224                         return '';
 225                 }
 226         }
 227 }
 228
 229
 230 /**
 231  * Generate a list of changes using the good old system (no javascript)
 232  */
 233 class OldChangesList extends ChangesList {
 234         /**
 235          * Format a line using the old system (aka without any javascript).
 236          */
 237         function recentChangesLine( &$rc, $watched = false ) {
 238                 global $wgContLang, $wgRCShowChangedSize;
 239
 240                 $fname = 'ChangesList::recentChangesLineOld';
 241                 wfProfileIn( $fname );
 242
 243                 # Extract DB fields into local scope
 244                 // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables.
 245                 extract( $rc->mAttribs );
 246
 247                 # Should patrol-related stuff be shown?
 248                 $unpatrolled = $this->usePatrol() && $rc_patrolled == 0;
 249
 250                 $this->insertDateHeader($s,$rc_timestamp);
 251
 252                 $s .= '<li>';
 253
 254                 // moved pages
 255                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 256                         $this->insertMove( $s, $rc );
 257                 // log entries
 258                 } elseif ( $rc_namespace == NS_SPECIAL ) {
 259                         list( $specialName, $specialSubpage ) = SpecialPage::resolveAliasWithSubpage( $rc_title );
 260                         if ( $specialName == 'Log' ) {
 261                                 $this->insertLog( $s, $rc->getTitle(), $specialSubpage );
 262                         } else {
 263                                 wfDebug( "Unexpected special page in recentchanges\n" );
 264                         }
 265                 // all other stuff
 266                 } else {
 267                         wfProfileIn($fname.'-page');
 268
 269                         $this->insertDiffHist($s, $rc, $unpatrolled);
 270
 271                         # M, N, b and ! (minor, new, bot and unpatrolled)
 272                         $s .= ' ' . $this->recentChangesFlags( $rc_type == RC_NEW, $rc_minor, $unpatrolled, '', $rc_bot );
 273                         $this->insertArticleLink($s, $rc, $unpatrolled, $watched);
 274
 275                         wfProfileOut($fname.'-page');
 276                 }
 277
 278                 wfProfileIn( $fname.'-rest' );
 279
 280                 $this->insertTimestamp($s,$rc);
 281
 282                 if( $wgRCShowChangedSize ) {
 283                         $s .= ( $rc->getCharacterDifference() == '' ? '' : $rc->getCharacterDifference() . ' . . ' );
 284                 }
 285
 286                 $this->insertUserRelatedLinks($s,$rc);
 287                 $this->insertComment($s, $rc);
 288
 289                 $s .=  rtrim(' ' . $this->numberofWatchingusers($rc->numberofWatchingusers));
 290
 291                 $s .= "</li>\n";
 292
 293                 wfProfileOut( $fname.'-rest' );
 294
 295                 wfProfileOut( $fname );
 296                 return $s;
 297         }
 298 }
 299
 300
 301 /**
 302  * Generate a list of changes using an Enhanced system (use javascript).
 303  */
 304 class EnhancedChangesList extends ChangesList {
 305         /**
 306          * Format a line for enhanced recentchange (aka with javascript and block of lines).
 307          */
 308         function recentChangesLine( &$baseRC, $watched = false ) {
 309                 global $wgLang, $wgContLang;
 310
 311                 # Create a specialised object
 312                 $rc = RCCacheEntry::newFromParent( $baseRC );
 313
 314                 # Extract fields from DB into the function scope (rc_xxxx variables)
 315                 // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables.
 316                 extract( $rc->mAttribs );
 317                 $curIdEq = 'curid=' . $rc_cur_id;
 318
 319                 # If it's a new day, add the headline and flush the cache
 320                 $date = $wgLang->date( $rc_timestamp, true);
 321                 $ret = '';
 322                 if( $date != $this->lastdate ) {
 323                         # Process current cache
 324                         $ret = $this->recentChangesBlock();
 325                         $this->rc_cache = array();
 326                         $ret .= "<h4>{$date}</h4>\n";
 327                         $this->lastdate = $date;
 328                 }
 329
 330                 # Should patrol-related stuff be shown?
 331                 if( $this->usePatrol() ) {
 332                         $rc->unpatrolled = !$rc_patrolled;
 333                 } else {
 334                         $rc->unpatrolled = false;
 335                 }
 336
 337                 # Make article link
 338                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 339                         $msg = ( $rc_type == RC_MOVE ) ? "1movedto2" : "1movedto2_redir";
 340                         $clink = wfMsg( $msg, $this->skin->makeKnownLinkObj( $rc->getTitle(), '', 'redirect=no' ),
 341                           $this->skin->makeKnownLinkObj( $rc->getMovedToTitle(), '' ) );
 342                 } elseif( $rc_namespace == NS_SPECIAL ) {
 343                         list( $specialName, $logtype ) = SpecialPage::resolveAliasWithSubpage( $rc_title );
 344                         if ( $specialName == 'Log' ) {
 345                                 # Log updates, etc
 346                                 $logname = LogPage::logName( $logtype );
 347                                 $clink = '(' . $this->skin->makeKnownLinkObj( $rc->getTitle(), $logname ) . ')';
 348                         } else {
 349                                 wfDebug( "Unexpected special page in recentchanges\n" );
 350                                 $clink = '';
 351                         }
 352                 } elseif( $rc->unpatrolled && $rc_type == RC_NEW ) {
 353                         # Unpatrolled new page, give rc_id in query
 354                         $clink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '', "rcid={$rc_id}" );
 355                 } else {
 356                         $clink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '' );
 357                 }
 358
 359                 $time = $wgContLang->time( $rc_timestamp, true, true );
 360                 $rc->watched = $watched;
 361                 $rc->link = $clink;
 362                 $rc->timestamp = $time;
 363                 $rc->numberofWatchingusers = $baseRC->numberofWatchingusers;
 364
 365                 # Make "cur" and "diff" links
 366                 if( $rc->unpatrolled ) {
 367                         $rcIdQuery = "&rcid={$rc_id}";
 368                 } else {
 369                         $rcIdQuery = '';
 370                 }
 371                 $querycur = $curIdEq."&diff=0&oldid=$rc_this_oldid";
 372                 $querydiff = $curIdEq."&diff=$rc_this_oldid&oldid=$rc_last_oldid$rcIdQuery";
 373                 $aprops = ' tabindex="'.$baseRC->counter.'"';
 374                 $curLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['cur'], $querycur, '' ,'', $aprops );
 375                 if( $rc_type == RC_NEW || $rc_type == RC_LOG || $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 376                         if( $rc_type != RC_NEW ) {
 377                                 $curLink = $this->message['cur'];
 378                         }
 379                         $diffLink = $this->message['diff'];
 380                 } else {
 381                         $diffLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['diff'], $querydiff, '' ,'', $aprops );
 382                 }
 383
 384                 # Make "last" link
 385                 if( $rc_last_oldid == 0 || $rc_type == RC_LOG || $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 386                         $lastLink = $this->message['last'];
 387                 } else {
 388                         $lastLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['last'],
 389                           $curIdEq.'&diff='.$rc_this_oldid.'&oldid='.$rc_last_oldid . $rcIdQuery );
 390                 }
 391
 392                 $rc->userlink = $this->skin->userLink( $rc_user, $rc_user_text );
 393
 394                 $rc->lastlink = $lastLink;
 395                 $rc->curlink  = $curLink;
 396                 $rc->difflink = $diffLink;
 397
 398                 $rc->usertalklink = $this->skin->userToolLinks( $rc_user, $rc_user_text );
 399
 400                 # Put accumulated information into the cache, for later display
 401                 # Page moves go on their own line
 402                 $title = $rc->getTitle();
 403                 $secureName = $title->getPrefixedDBkey();
 404                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 405                         # Use an @ character to prevent collision with page names
 406                         $this->rc_cache['@@' . ($this->rcMoveIndex++)] = array($rc);
 407                 } else {
 408                         if( !isset ( $this->rc_cache[$secureName] ) ) {
 409                                 $this->rc_cache[$secureName] = array();
 410                         }
 411                         array_push( $this->rc_cache[$secureName], $rc );
 412                 }
 413                 return $ret;
 414         }
 415
 416         /**
 417          * Enhanced RC group
 418          */
 419         function recentChangesBlockGroup( $block ) {
 420                 global $wgLang, $wgContLang, $wgRCShowChangedSize;
 421                 $r = '';
 422
 423                 # Collate list of users
 424                 $isnew = false;
 425                 $unpatrolled = false;
 426                 $userlinks = array();
 427                 foreach( $block as $rcObj ) {
 428                         $oldid = $rcObj->mAttribs['rc_last_oldid'];
 429                         if( $rcObj->mAttribs['rc_new'] ) {
 430                                 $isnew = true;
 431                         }
 432                         $u = $rcObj->userlink;
 433                         if( !isset( $userlinks[$u] ) ) {
 434                                 $userlinks[$u] = 0;
 435                         }
 436                         if( $rcObj->unpatrolled ) {
 437                                 $unpatrolled = true;
 438                         }
 439                         $bot = $rcObj->mAttribs['rc_bot'];
 440                         $userlinks[$u]++;
 441                 }
 442
 443                 # Sort the list and convert to text
 444                 krsort( $userlinks );
 445                 asort( $userlinks );
 446                 $users = array();
 447                 foreach( $userlinks as $userlink => $count) {
 448                         $text = $userlink;
 449                         $text .= $wgContLang->getDirMark();
 450                         if( $count > 1 ) {
 451                                 $text .= ' ('.$count.'&times;)';
 452                         }
 453                         array_push( $users, $text );
 454                 }
 455
 456                 $users = ' <span class="changedby">['.implode('; ',$users).']</span>';
 457
 458                 # Arrow
 459                 $rci = 'RCI'.$this->rcCacheIndex;
 460                 $rcl = 'RCL'.$this->rcCacheIndex;
 461                 $rcm = 'RCM'.$this->rcCacheIndex;
 462                 $toggleLink = "javascript:toggleVisibility('$rci','$rcm','$rcl')";
 463                 $tl  = '<span id="'.$rcm.'"><a href="'.$toggleLink.'">' . $this->sideArrow() . '</a></span>';
 464                 $tl .= '<span id="'.$rcl.'" style="display:none"><a href="'.$toggleLink.'">' . $this->downArrow() . '</a></span>';
 465                 $r .= $tl;
 466
 467                 # Main line
 468                 $r .= '<tt>';
 469                 $r .= $this->recentChangesFlags( $isnew, false, $unpatrolled, '&nbsp;', $bot );
 470
 471                 # Timestamp
 472                 $r .= ' '.$block[0]->timestamp.' </tt>';
 473
 474                 # Article link
 475                 $r .= $this->maybeWatchedLink( $block[0]->link, $block[0]->watched );
 476                 $r .= $wgContLang->getDirMark();
 477
 478                 $curIdEq = 'curid=' . $block[0]->mAttribs['rc_cur_id'];
 479                 $currentRevision = $block[0]->mAttribs['rc_this_oldid'];
 480                 if( $block[0]->mAttribs['rc_type'] != RC_LOG ) {
 481                         # Changes
 482
 483                         $n = count($block);
 484                         static $nchanges = array();
 485                         if ( !isset( $nchanges[$n] ) ) {
 486                                 $nchanges[$n] = wfMsgExt( 'nchanges', array( 'parsemag', 'escape'),
 487                                         $wgLang->formatNum( $n ) );
 488                         }
 489
 490                         $r .= ' (';
 491
 492                         if( $isnew ) {
 493                                 $r .= $nchanges[$n];
 494                         } else {
 495                                 $r .= $this->skin->makeKnownLinkObj( $block[0]->getTitle(),
 496                                         $nchanges[$n], $curIdEq."&diff=$currentRevision&oldid=$oldid" );
 497                         }
 498
 499                         $r .= ') . . ';
 500
 501                         if( $wgRCShowChangedSize ) {
 502                                 # Character difference
 503                                 $chardiff = $rcObj->getCharacterDifference( $block[ count( $block ) - 1 ]->mAttribs['rc_old_len'],
 504                                                 $block[0]->mAttribs['rc_new_len'] );
 505                                 if( $chardiff == '' ) {
 506                                         $r .= ' (';
 507                                 } else {
 508                                         $r .= ' ' . $chardiff. ' . . ';
 509                                 }
 510                         }
 511
 512                         # History
 513                         $r .= '(' . $this->skin->makeKnownLinkObj( $block[0]->getTitle(),
 514                                 $this->message['history'], $curIdEq.'&action=history' );
 515                         $r .= ')';
 516                 }
 517
 518                 $r .= $users;
 519
 520                 $r .= $this->numberofWatchingusers($block[0]->numberofWatchingusers);
 521                 $r .= "<br />\n";
 522
 523                 # Sub-entries
 524                 $r .= '<div id="'.$rci.'" style="display:none">';
 525                 foreach( $block as $rcObj ) {
 526                         # Get rc_xxxx variables
 527                         // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables.
 528                         extract( $rcObj->mAttribs );
 529
 530                         $r .= $this->spacerArrow();
 531                         $r .= '<tt>&nbsp; &nbsp; &nbsp; &nbsp;';
 532                         $r .= $this->recentChangesFlags( $rc_new, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot );
 533                         $r .= '&nbsp;</tt>';
 534
 535                         $o = '';
 536                         if( $rc_this_oldid != 0 ) {
 537                                 $o = 'oldid='.$rc_this_oldid;
 538                         }
 539                         if( $rc_type == RC_LOG ) {
 540                                 $link = $rcObj->timestamp;
 541                         } else {
 542                                 $link = $this->skin->makeKnownLinkObj( $rcObj->getTitle(), $rcObj->timestamp, $curIdEq.'&'.$o );
 543                         }
 544                         $link = '<tt>'.$link.'</tt>';
 545
 546                         $r .= $link;
 547                         $r .= ' (';
 548                         $r .= $rcObj->curlink;
 549                         $r .= '; ';
 550                         $r .= $rcObj->lastlink;
 551                         $r .= ') . . ';
 552
 553                         # Character diff
 554                         if( $wgRCShowChangedSize ) {
 555                                 $r .= ( $rcObj->getCharacterDifference() == '' ? '' : $rcObj->getCharacterDifference() . ' . . ' ) ;
 556                         }
 557
 558                         $r .= $rcObj->userlink;
 559                         $r .= $rcObj->usertalklink;
 560                         $r .= $this->skin->commentBlock( $rc_comment, $rcObj->getTitle() );
 561                         $r .= "<br />\n";
 562                 }
 563                 $r .= "</div>\n";
 564
 565                 $this->rcCacheIndex++;
 566                 return $r;
 567         }
 568
 569         function maybeWatchedLink( $link, $watched=false ) {
 570                 if( $watched ) {
 571                         // FIXME: css style might be more appropriate
 572                         return '<strong class="mw-watched">' . $link . '</strong>';
 573                 } else {
 574                         return $link;
 575                 }
 576         }
 577
 578         /**
 579          * Generate HTML for an arrow or placeholder graphic
 580          * @param string $dir one of '', 'd', 'l', 'r'
 581          * @param string $alt text
 582          * @return string HTML <img> tag
 583          * @access private
 584          */
 585         function arrow( $dir, $alt='' ) {
 586                 global $wgStylePath;
 587                 $encUrl = htmlspecialchars( $wgStylePath . '/common/images/Arr_' . $dir . '.png' );
 588                 $encAlt = htmlspecialchars( $alt );
 589                 return "<img src=\"$encUrl\" width=\"12\" height=\"12\" alt=\"$encAlt\" />";
 590         }
 591
 592         /**
 593          * Generate HTML for a right- or left-facing arrow,
 594          * depending on language direction.
 595          * @return string HTML <img> tag
 596          * @access private
 597          */
 598         function sideArrow() {
 599                 global $wgContLang;
 600                 $dir = $wgContLang->isRTL() ? 'l' : 'r';
 601                 return $this->arrow( $dir, '+' );
 602         }
 603
 604         /**
 605          * Generate HTML for a down-facing arrow
 606          * depending on language direction.
 607          * @return string HTML <img> tag
 608          * @access private
 609          */
 610         function downArrow() {
 611                 return $this->arrow( 'd', '-' );
 612         }
 613
 614         /**
 615          * Generate HTML for a spacer image
 616          * @return string HTML <img> tag
 617          * @access private
 618          */
 619         function spacerArrow() {
 620                 return $this->arrow( '', ' ' );
 621         }
 622
 623         /**
 624          * Enhanced RC ungrouped line.
 625          * @return string a HTML formated line (generated using $r)
 626          */
 627         function recentChangesBlockLine( $rcObj ) {
 628                 global $wgContLang, $wgRCShowChangedSize;
 629
 630                 # Get rc_xxxx variables
 631                 // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables.
 632                 extract( $rcObj->mAttribs );
 633                 $curIdEq = 'curid='.$rc_cur_id;
 634
 635                 $r = '';
 636
 637                 # Spacer image
 638                 $r .= $this->spacerArrow();
 639
 640                 # Flag and Timestamp
 641                 $r .= '<tt>';
 642
 643                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 644                         $r .= '&nbsp;&nbsp;&nbsp;';
 645                 } else {
 646                         $r .= $this->recentChangesFlags( $rc_type == RC_NEW, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot );
 647                 }
 648                 $r .= ' '.$rcObj->timestamp.' </tt>';
 649
 650                 # Article link
 651                 $r .= $this->maybeWatchedLink( $rcObj->link, $rcObj->watched );
 652
 653                 # Diff
 654                 $r .= ' ('. $rcObj->difflink .'; ';
 655
 656                 # Hist
 657                 $r .= $this->skin->makeKnownLinkObj( $rcObj->getTitle(), wfMsg( 'hist' ), $curIdEq.'&action=history' ) . ') . . ';
 658
 659                 # Character diff
 660                 if( $wgRCShowChangedSize ) {
 661                         $r .= ( $rcObj->getCharacterDifference() == '' ? '' : '&nbsp;' . $rcObj->getCharacterDifference() . ' . . ' ) ;
 662                 }
 663
 664                 # User/talk
 665                 $r .= $rcObj->userlink . $rcObj->usertalklink;
 666
 667                 # Comment
 668                 if( $rc_type != RC_MOVE && $rc_type != RC_MOVE_OVER_REDIRECT ) {
 669                         $r .= $this->skin->commentBlock( $rc_comment, $rcObj->getTitle() );
 670                 }
 671
 672                 $r .= $this->numberofWatchingusers($rcObj->numberofWatchingusers);
 673
 674                 $r .= "<br />\n";
 675                 return $r;
 676         }
 677
 678         /**
 679          * If enhanced RC is in use, this function takes the previously cached
 680          * RC lines, arranges them, and outputs the HTML
 681          */
 682         function recentChangesBlock() {
 683                 if( count ( $this->rc_cache ) == 0 ) {
 684                         return '';
 685                 }
 686                 $blockOut = '';
 687                 foreach( $this->rc_cache as $block ) {
 688                         if( count( $block ) < 2 ) {
 689                                 $blockOut .= $this->recentChangesBlockLine( array_shift( $block ) );
 690                         } else {
 691                                 $blockOut .= $this->recentChangesBlockGroup( $block );
 692                         }
 693                 }
 694
 695                 return '<div>'.$blockOut.'</div>';
 696         }
 697
 698         /**
 699          * Returns text for the end of RC
 700          * If enhanced RC is in use, returns pretty much all the text
 701          */
 702         function endRecentChangesList() {
 703                 return $this->recentChangesBlock() . parent::endRecentChangesList();
 704         }
 705
 706 }
 707