includes/ChangesList.php

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