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