includes/changes/EnhancedChangesList.php

   1 <?php
   2 /**
   3  * Generates a list of changes using an Enhanced system (uses javascript).
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 class EnhancedChangesList extends ChangesList {
  24
  25         /**
  26          * @var RCCacheEntryFactory
  27          */
  28         protected $cacheEntryFactory;
  29
  30         /**
  31          * @var array Array of array of RCCacheEntry
  32          */
  33         protected $rc_cache;
  34
  35         /**
  36          * @param IContextSource|Skin $obj
  37          * @throws MWException
  38          */
  39         public function __construct( $obj ) {
  40                 if ( $obj instanceof Skin ) {
  41                         // @todo: deprecate constructing with Skin
  42                         $context = $obj->getContext();
  43                 } else {
  44                         if ( !$obj instanceof IContextSource ) {
  45                                 throw new MWException( 'EnhancedChangesList must be constructed with a '
  46                                         . 'context source or skin.' );
  47                         }
  48
  49                         $context = $obj;
  50                 }
  51
  52                 parent::__construct( $context );
  53
  54                 // message is set by the parent ChangesList class
  55                 $this->cacheEntryFactory = new RCCacheEntryFactory(
  56                         $context,
  57                         $this->message
  58                 );
  59         }
  60
  61         /**
  62          * Add the JavaScript file for enhanced changeslist
  63          * @return string
  64          */
  65         public function beginRecentChangesList() {
  66                 $this->rc_cache = array();
  67                 $this->rcMoveIndex = 0;
  68                 $this->rcCacheIndex = 0;
  69                 $this->lastdate = '';
  70                 $this->rclistOpen = false;
  71                 $this->getOutput()->addModuleStyles( array(
  72                         'mediawiki.special.changeslist',
  73                         'mediawiki.special.changeslist.enhanced',
  74                 ) );
  75                 $this->getOutput()->addModules( array(
  76                         'jquery.makeCollapsible',
  77                         'mediawiki.icon',
  78                 ) );
  79
  80                 return '<div class="mw-changeslist">';
  81         }
  82
  83         /**
  84          * Format a line for enhanced recentchange (aka with javascript and block of lines).
  85          *
  86          * @param RecentChange $rc
  87          * @param bool $watched
  88          * @param int $linenumber (default null)
  89          *
  90          * @return string
  91          */
  92         public function recentChangesLine( &$rc, $watched = false, $linenumber = null ) {
  93
  94                 $date = $this->getLanguage()->userDate(
  95                         $rc->mAttribs['rc_timestamp'],
  96                         $this->getUser()
  97                 );
  98
  99                 $ret = '';
 100
 101                 # If it's a new day, add the headline and flush the cache
 102                 if ( $date != $this->lastdate ) {
 103                         # Process current cache
 104                         $ret = $this->recentChangesBlock();
 105                         $this->rc_cache = array();
 106                         $ret .= Xml::element( 'h4', null, $date ) . "\n";
 107                         $this->lastdate = $date;
 108                 }
 109
 110                 $cacheEntry = $this->cacheEntryFactory->newFromRecentChange( $rc, $watched );
 111                 $this->addCacheEntry( $cacheEntry );
 112
 113                 return $ret;
 114         }
 115
 116         /**
 117          * Put accumulated information into the cache, for later display.
 118          * Page moves go on their own line.
 119          *
 120          * @param RCCacheEntry $cacheEntry
 121          */
 122         protected function addCacheEntry( RCCacheEntry $cacheEntry ) {
 123                 $cacheGroupingKey = $this->makeCacheGroupingKey( $cacheEntry );
 124
 125                 if ( !isset( $this->rc_cache[$cacheGroupingKey] ) ) {
 126                         $this->rc_cache[$cacheGroupingKey] = array();
 127                 }
 128
 129                 array_push( $this->rc_cache[$cacheGroupingKey], $cacheEntry );
 130         }
 131
 132         /**
 133          * @todo use rc_source to group, if set; fallback to rc_type
 134          *
 135          * @param RCCacheEntry $cacheEntry
 136          *
 137          * @return string
 138          */
 139         protected function makeCacheGroupingKey( RCCacheEntry $cacheEntry ) {
 140                 $title = $cacheEntry->getTitle();
 141                 $cacheGroupingKey = $title->getPrefixedDBkey();
 142
 143                 $type = $cacheEntry->mAttribs['rc_type'];
 144
 145                 if ( $type == RC_LOG ) {
 146                         // Group by log type
 147                         $cacheGroupingKey = SpecialPage::getTitleFor(
 148                                 'Log',
 149                                 $cacheEntry->mAttribs['rc_log_type']
 150                         )->getPrefixedDBkey();
 151                 }
 152
 153                 return $cacheGroupingKey;
 154         }
 155
 156         /**
 157          * Enhanced RC group
 158          * @param RCCacheEntry[] $block
 159          * @return string
 160          */
 161         protected function recentChangesBlockGroup( $block ) {
 162
 163                 # Add the namespace and title of the block as part of the class
 164                 $classes = array( 'mw-collapsible', 'mw-collapsed', 'mw-enhanced-rc' );
 165                 if ( $block[0]->mAttribs['rc_log_type'] ) {
 166                         # Log entry
 167                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-log-'
 168                                 . $block[0]->mAttribs['rc_log_type'] );
 169                 } else {
 170                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-ns'
 171                                 . $block[0]->mAttribs['rc_namespace'] . '-' . $block[0]->mAttribs['rc_title'] );
 172                 }
 173                 $classes[] = $block[0]->watched && $block[0]->mAttribs['rc_timestamp'] >= $block[0]->watched
 174                         ? 'mw-changeslist-line-watched' : 'mw-changeslist-line-not-watched';
 175                 $r = Html::openElement( 'table', array( 'class' => $classes ) ) .
 176                         Html::openElement( 'tr' );
 177
 178                 # Collate list of users
 179                 $userlinks = array();
 180                 # Other properties
 181                 $unpatrolled = false;
 182                 $isnew = false;
 183                 $allBots = true;
 184                 $allMinors = true;
 185                 $curId = 0;
 186                 # Some catalyst variables...
 187                 $namehidden = true;
 188                 $allLogs = true;
 189                 $RCShowChangedSize = $this->getConfig()->get( 'RCShowChangedSize' );
 190                 foreach ( $block as $rcObj ) {
 191                         if ( $rcObj->mAttribs['rc_type'] == RC_NEW ) {
 192                                 $isnew = true;
 193                         }
 194                         // If all log actions to this page were hidden, then don't
 195                         // give the name of the affected page for this block!
 196                         if ( !$this->isDeleted( $rcObj, LogPage::DELETED_ACTION ) ) {
 197                                 $namehidden = false;
 198                         }
 199                         $u = $rcObj->userlink;
 200                         if ( !isset( $userlinks[$u] ) ) {
 201                                 $userlinks[$u] = 0;
 202                         }
 203                         if ( $rcObj->unpatrolled ) {
 204                                 $unpatrolled = true;
 205                         }
 206                         if ( $rcObj->mAttribs['rc_type'] != RC_LOG ) {
 207                                 $allLogs = false;
 208                         }
 209                         # Get the latest entry with a page_id and oldid
 210                         # since logs may not have these.
 211                         if ( !$curId && $rcObj->mAttribs['rc_cur_id'] ) {
 212                                 $curId = $rcObj->mAttribs['rc_cur_id'];
 213                         }
 214
 215                         if ( !$rcObj->mAttribs['rc_bot'] ) {
 216                                 $allBots = false;
 217                         }
 218                         if ( !$rcObj->mAttribs['rc_minor'] ) {
 219                                 $allMinors = false;
 220                         }
 221
 222                         $userlinks[$u]++;
 223                 }
 224
 225                 # Sort the list and convert to text
 226                 krsort( $userlinks );
 227                 asort( $userlinks );
 228                 $users = array();
 229                 foreach ( $userlinks as $userlink => $count ) {
 230                         $text = $userlink;
 231                         $text .= $this->getLanguage()->getDirMark();
 232                         if ( $count > 1 ) {
 233                                 // @todo FIXME: Hardcoded '×'. Should be a message.
 234                                 $formattedCount = $this->getLanguage()->formatNum( $count ) . '×';
 235                                 $text .= ' ' . $this->msg( 'parentheses' )->rawParams( $formattedCount )->escaped();
 236                         }
 237                         array_push( $users, $text );
 238                 }
 239
 240                 $users = ' <span class="changedby">'
 241                         . $this->msg( 'brackets' )->rawParams(
 242                                 implode( $this->message['semicolon-separator'], $users )
 243                         )->escaped() . '</span>';
 244
 245                 $tl = '<span class="mw-collapsible-toggle mw-collapsible-arrow ' .
 246                         'mw-enhancedchanges-arrow mw-enhancedchanges-arrow-space"></span>';
 247                 $r .= "<td>$tl</td>";
 248
 249                 # Main line
 250                 $r .= '<td class="mw-enhanced-rc">' . $this->recentChangesFlags( array(
 251                         'newpage' => $isnew, # show, when one have this flag
 252                         'minor' => $allMinors, # show only, when all have this flag
 253                         'unpatrolled' => $unpatrolled, # show, when one have this flag
 254                         'bot' => $allBots, # show only, when all have this flag
 255                 ) );
 256
 257                 # Timestamp
 258                 $r .= '&#160;' . $block[0]->timestamp . '&#160;</td><td>';
 259
 260                 # Article link
 261                 if ( $namehidden ) {
 262                         $r .= ' <span class="history-deleted">' .
 263                                 $this->msg( 'rev-deleted-event' )->escaped() . '</span>';
 264                 } elseif ( $allLogs ) {
 265                         $r .= $this->maybeWatchedLink( $block[0]->link, $block[0]->watched );
 266                 } else {
 267                         $this->insertArticleLink( $r, $block[0], $block[0]->unpatrolled, $block[0]->watched );
 268                 }
 269
 270                 $r .= $this->getLanguage()->getDirMark();
 271
 272                 $queryParams['curid'] = $curId;
 273
 274                 # Sub-entries
 275                 $lines = '';
 276                 foreach ( $block as $i => $rcObj ) {
 277                         $line = $this->getLineData( $block, $rcObj, $queryParams );
 278                         $lines .= $line;
 279                         if ( !$line ) {
 280                                 // completely ignore this RC entry if we don't want to render it
 281                                 unset( $block[$i] );
 282                         }
 283                 }
 284                 // Further down are some assumptions that $block is a 0-indexed array
 285                 // with (count-1) as last key. Let's make sure it is.
 286                 $block = array_values( $block );
 287                 if ( empty( $block ) ) {
 288                         // if we can't show anything, don't display this block altogether
 289                         return '';
 290                 }
 291
 292                 $r .= $this->getLogText( $block, $queryParams, $allLogs, $isnew, $namehidden );
 293
 294                 $r .= ' <span class="mw-changeslist-separator">. .</span> ';
 295
 296                 # Character difference (does not apply if only log items)
 297                 if ( $RCShowChangedSize && !$allLogs ) {
 298                         $last = 0;
 299                         $first = count( $block ) - 1;
 300                         # Some events (like logs) have an "empty" size, so we need to skip those...
 301                         while ( $last < $first && $block[$last]->mAttribs['rc_new_len'] === null ) {
 302                                 $last++;
 303                         }
 304                         while ( $first > $last && $block[$first]->mAttribs['rc_old_len'] === null ) {
 305                                 $first--;
 306                         }
 307                         # Get net change
 308                         $chardiff = $this->formatCharacterDifference( $block[$first], $block[$last] );
 309
 310                         if ( $chardiff == '' ) {
 311                                 $r .= ' ';
 312                         } else {
 313                                 $r .= ' ' . $chardiff . ' <span class="mw-changeslist-separator">. .</span> ';
 314                         }
 315                 }
 316
 317                 $r .= $users;
 318                 $r .= $this->numberofWatchingusers( $block[0]->numberofWatchingusers );
 319                 $r .= '</td></tr>';
 320
 321                 if ( !$lines ) {
 322                         // if there are no lines to be rendered (all aborted by hook), don't render the block
 323                         return '';
 324                 }
 325
 326                 $r .= $lines;
 327                 $r .= "</table>\n";
 328
 329                 $this->rcCacheIndex++;
 330
 331                 return $r;
 332         }
 333
 334         /**
 335          * @param RCCacheEntry[] $block
 336          * @param RCCacheEntry $rcObj
 337          * @param array $queryParams
 338          * @return string
 339          * @throws Exception
 340          * @throws FatalError
 341          * @throws MWException
 342          */
 343         protected function getLineData( array $block, RCCacheEntry $rcObj, array $queryParams = array() ) {
 344                 $RCShowChangedSize = $this->getConfig()->get( 'RCShowChangedSize' );
 345
 346                 # Classes to apply -- TODO implement
 347                 $classes = array();
 348                 $type = $rcObj->mAttribs['rc_type'];
 349                 $data = array();
 350
 351                 $trClass = $rcObj->watched && $rcObj->mAttribs['rc_timestamp'] >= $rcObj->watched
 352                         ? ' class="mw-enhanced-watched"' : '';
 353                 $separator = ' <span class="mw-changeslist-separator">. .</span> ';
 354
 355                 $data['recentChangesFlags'] = array(
 356                         'newpage' => $type == RC_NEW,
 357                         'minor' => $rcObj->mAttribs['rc_minor'],
 358                         'unpatrolled' => $rcObj->unpatrolled,
 359                         'bot' => $rcObj->mAttribs['rc_bot'],
 360                 );
 361
 362                 $params = $queryParams;
 363
 364                 if ( $rcObj->mAttribs['rc_this_oldid'] != 0 ) {
 365                         $params['oldid'] = $rcObj->mAttribs['rc_this_oldid'];
 366                 }
 367
 368                 # Log timestamp
 369                 if ( $type == RC_LOG ) {
 370                         $link = $rcObj->timestamp;
 371                         # Revision link
 372                 } elseif ( !ChangesList::userCan( $rcObj, Revision::DELETED_TEXT, $this->getUser() ) ) {
 373                         $link = '<span class="history-deleted">' . $rcObj->timestamp . '</span> ';
 374                 } else {
 375                         $link = Linker::linkKnown(
 376                                 $rcObj->getTitle(),
 377                                 $rcObj->timestamp,
 378                                 array(),
 379                                 $params
 380                         );
 381                         if ( $this->isDeleted( $rcObj, Revision::DELETED_TEXT ) ) {
 382                                 $link = '<span class="history-deleted">' . $link . '</span> ';
 383                         }
 384                 }
 385                 $data['timestampLink'] = $link;
 386
 387                 $currentAndLastLinks = '';
 388                 if ( !$type == RC_LOG || $type == RC_NEW ) {
 389                         $currentAndLastLinks .= ' ' . $this->msg( 'parentheses' )->rawParams(
 390                                         $rcObj->curlink .
 391                                         $this->message['pipe-separator'] .
 392                                         $rcObj->lastlink
 393                                 )->escaped();
 394                 }
 395                 $data['currentAndLastLinks'] = $currentAndLastLinks;
 396                 $data['separatorAfterCurrentAndLastLinks'] = $separator;
 397
 398                 # Character diff
 399                 if ( $RCShowChangedSize ) {
 400                         $cd = $this->formatCharacterDifference( $rcObj );
 401                         if ( $cd !== '' ) {
 402                                 $data['characterDiff'] = $cd;
 403                                 $data['separatorAfterCharacterDiff'] = $separator;
 404                         }
 405                 }
 406
 407                 if ( $rcObj->mAttribs['rc_type'] == RC_LOG ) {
 408                         $data['logEntry'] = $this->insertLogEntry( $rcObj );
 409                 } else {
 410                         # User links
 411                         $data['userLink'] = $rcObj->userlink;
 412                         $data['userTalkLink'] = $rcObj->usertalklink;
 413                         $data['comment'] = $this->insertComment( $rcObj );
 414                 }
 415
 416                 # Rollback
 417                 $data['rollback'] = $this->getRollback( $rcObj );
 418
 419                 # Tags
 420                 $data['tags'] = $this->getTags( $rcObj, $classes );
 421
 422                 // give the hook a chance to modify the data
 423                 $success = Hooks::run( 'EnhancedChangesListModifyLineData',
 424                         array( $this, &$data, $block, $rcObj ) );
 425                 if ( !$success ) {
 426                         // skip entry if hook aborted it
 427                         return '';
 428                 }
 429
 430                 $line = '<tr' . $trClass . '><td></td><td class="mw-enhanced-rc">';
 431                 if ( isset( $data['recentChangesFlags'] ) ) {
 432                         $line .= $this->recentChangesFlags( $data['recentChangesFlags'] );
 433                         unset( $data['recentChangesFlags'] );
 434                 }
 435                 $line .= '&#160;</td><td class="mw-enhanced-rc-nested">';
 436
 437                 if ( isset( $data['timestampLink'] ) ) {
 438                         $line .= '<span class="mw-enhanced-rc-time">' . $data['timestampLink'] . '</span>';
 439                         unset( $data['timestampLink'] );
 440                 }
 441
 442                 // everything else: makes it easier for extensions to add or remove data
 443                 $line .= implode( '', $data );
 444
 445                 $line .= "</td></tr>\n";
 446
 447                 return $line;
 448         }
 449
 450         /**
 451          * Generates amount of changes (linking to diff ) & link to history.
 452          *
 453          * @param array $block
 454          * @param array $queryParams
 455          * @param bool $allLogs
 456          * @param bool $isnew
 457          * @param bool $namehidden
 458          * @return string
 459          */
 460         protected function getLogText( $block, $queryParams, $allLogs, $isnew, $namehidden ) {
 461                 if ( empty( $block ) ) {
 462                         return '';
 463                 }
 464
 465                 # Changes message
 466                 static $nchanges = array();
 467                 static $sinceLastVisitMsg = array();
 468
 469                 $n = count( $block );
 470                 if ( !isset( $nchanges[$n] ) ) {
 471                         $nchanges[$n] = $this->msg( 'nchanges' )->numParams( $n )->escaped();
 472                 }
 473
 474                 $sinceLast = 0;
 475                 $unvisitedOldid = null;
 476                 /** @var $rcObj RCCacheEntry */
 477                 foreach ( $block as $rcObj ) {
 478                         // Same logic as below inside main foreach
 479                         if ( $rcObj->watched && $rcObj->mAttribs['rc_timestamp'] >= $rcObj->watched ) {
 480                                 $sinceLast++;
 481                                 $unvisitedOldid = $rcObj->mAttribs['rc_last_oldid'];
 482                         }
 483                 }
 484                 if ( !isset( $sinceLastVisitMsg[$sinceLast] ) ) {
 485                         $sinceLastVisitMsg[$sinceLast] =
 486                                 $this->msg( 'enhancedrc-since-last-visit' )->numParams( $sinceLast )->escaped();
 487                 }
 488
 489                 $currentRevision = 0;
 490                 foreach ( $block as $rcObj ) {
 491                         if ( !$currentRevision ) {
 492                                 $currentRevision = $rcObj->mAttribs['rc_this_oldid'];
 493                         }
 494                 }
 495
 496                 # Total change link
 497                 $links = array();
 498                 /** @var $block0 RecentChange */
 499                 $block0 = $block[0];
 500                 $last = $block[count( $block ) - 1];
 501                 if ( !$allLogs ) {
 502                         if ( !ChangesList::userCan( $rcObj, Revision::DELETED_TEXT, $this->getUser() ) ) {
 503                                 $links['total-changes'] = $nchanges[$n];
 504                         } elseif ( $isnew ) {
 505                                 $links['total-changes'] = $nchanges[$n];
 506                         } else {
 507                                 $links['total-changes'] = Linker::link(
 508                                         $block0->getTitle(),
 509                                         $nchanges[$n],
 510                                         array(),
 511                                         $queryParams + array(
 512                                                 'diff' => $currentRevision,
 513                                                 'oldid' => $last->mAttribs['rc_last_oldid'],
 514                                         ),
 515                                         array( 'known', 'noclasses' )
 516                                 );
 517                                 if ( $sinceLast > 0 && $sinceLast < $n ) {
 518                                         $links['total-changes-since-last'] = Linker::link(
 519                                                         $block0->getTitle(),
 520                                                         $sinceLastVisitMsg[$sinceLast],
 521                                                         array(),
 522                                                         $queryParams + array(
 523                                                                 'diff' => $currentRevision,
 524                                                                 'oldid' => $unvisitedOldid,
 525                                                         ),
 526                                                         array( 'known', 'noclasses' )
 527                                                 );
 528                                 }
 529                         }
 530                 }
 531
 532                 # History
 533                 if ( $allLogs ) {
 534                         // don't show history link for logs
 535                 } elseif ( $namehidden || !$block0->getTitle()->exists() ) {
 536                         $links['history'] = $this->message['enhancedrc-history'];
 537                 } else {
 538                         $params = $queryParams;
 539                         $params['action'] = 'history';
 540
 541                         $links['history'] = Linker::linkKnown(
 542                                         $block0->getTitle(),
 543                                         $this->message['enhancedrc-history'],
 544                                         array(),
 545                                         $params
 546                                 );
 547                 }
 548
 549                 # Allow others to alter, remove or add to these links
 550                 Hooks::run( 'EnhancedChangesList::getLogText',
 551                         array( $this, &$links, $block ) );
 552
 553                 if ( !$links ) {
 554                         return '';
 555                 }
 556
 557                 $logtext = implode( $this->message['pipe-separator'], $links );
 558                 $logtext = $this->msg( 'parentheses' )->rawParams( $logtext )->escaped();
 559                 return ' ' . $logtext;
 560         }
 561
 562         /**
 563          * Enhanced RC ungrouped line.
 564          *
 565          * @param RecentChange|RCCacheEntry $rcObj
 566          * @return string A HTML formatted line (generated using $r)
 567          */
 568         protected function recentChangesBlockLine( $rcObj ) {
 569                 $data = array();
 570
 571                 $query['curid'] = $rcObj->mAttribs['rc_cur_id'];
 572
 573                 $type = $rcObj->mAttribs['rc_type'];
 574                 $logType = $rcObj->mAttribs['rc_log_type'];
 575                 $classes = array( 'mw-enhanced-rc' );
 576                 if ( $logType ) {
 577                         # Log entry
 578                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-log-' . $logType );
 579                 } else {
 580                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-ns' .
 581                                 $rcObj->mAttribs['rc_namespace'] . '-' . $rcObj->mAttribs['rc_title'] );
 582                 }
 583                 $classes[] = $rcObj->watched && $rcObj->mAttribs['rc_timestamp'] >= $rcObj->watched
 584                         ? 'mw-changeslist-line-watched' : 'mw-changeslist-line-not-watched';
 585
 586                 # Flag and Timestamp
 587                 $data['recentChangesFlags'] = array(
 588                         'newpage' => $type == RC_NEW,
 589                         'minor' => $rcObj->mAttribs['rc_minor'],
 590                         'unpatrolled' => $rcObj->unpatrolled,
 591                         'bot' => $rcObj->mAttribs['rc_bot'],
 592                 );
 593                 // timestamp is not really a link here, but is called timestampLink
 594                 // for consistency with EnhancedChangesListModifyLineData
 595                 $data['timestampLink'] = $rcObj->timestamp;
 596
 597                 # Article or log link
 598                 if ( $logType ) {
 599                         $logPage = new LogPage( $logType );
 600                         $logTitle = SpecialPage::getTitleFor( 'Log', $logType );
 601                         $logName = $logPage->getName()->escaped();
 602                         $data['logLink'] = $this->msg( 'parentheses' )
 603                                 ->rawParams( Linker::linkKnown( $logTitle, $logName ) )->escaped();
 604                 } else {
 605                         $data['articleLink'] = $this->getArticleLink( $rcObj, $rcObj->unpatrolled, $rcObj->watched );
 606                 }
 607
 608                 # Diff and hist links
 609                 if ( $type != RC_LOG ) {
 610                         $query['action'] = 'history';
 611                         $data['historyLink'] = ' ' . $this->msg( 'parentheses' )
 612                                 ->rawParams( $rcObj->difflink . $this->message['pipe-separator'] . Linker::linkKnown(
 613                                         $rcObj->getTitle(),
 614                                         $this->message['hist'],
 615                                         array(),
 616                                         $query
 617                                 ) )->escaped();
 618                 }
 619                 $data['separatorAfterLinks'] = ' <span class="mw-changeslist-separator">. .</span> ';
 620
 621                 # Character diff
 622                 if ( $this->getConfig()->get( 'RCShowChangedSize' ) ) {
 623                         $cd = $this->formatCharacterDifference( $rcObj );
 624                         if ( $cd !== '' ) {
 625                                 $data['characterDiff'] = $cd;
 626                                 $data['separatorAftercharacterDiff'] = ' <span class="mw-changeslist-separator">. .</span> ';
 627                         }
 628                 }
 629
 630                 if ( $type == RC_LOG ) {
 631                         $data['logEntry'] = $this->insertLogEntry( $rcObj );
 632                 } else {
 633                         $data['userLink'] = $rcObj->userlink;
 634                         $data['userTalkLink'] = $rcObj->usertalklink;
 635                         $data['comment'] = $this->insertComment( $rcObj );
 636                         $data['rollback'] = $this->getRollback( $rcObj );
 637                 }
 638
 639                 # Tags
 640                 $data['tags'] = $this->getTags( $rcObj, $classes );
 641
 642                 # Show how many people are watching this if enabled
 643                 $data['watchingUsers'] = $this->numberofWatchingusers( $rcObj->numberofWatchingusers );
 644
 645                 // give the hook a chance to modify the data
 646                 $success = Hooks::run( 'EnhancedChangesListModifyBlockLineData',
 647                         array( $this, &$data, $rcObj ) );
 648                 if ( !$success ) {
 649                         // skip entry if hook aborted it
 650                         return '';
 651                 }
 652
 653                 $line = Html::openElement( 'table', array( 'class' => $classes ) ) .
 654                         Html::openElement( 'tr' );
 655                 $line .= '<td class="mw-enhanced-rc"><span class="mw-enhancedchanges-arrow-space"></span>';
 656
 657                 if ( isset( $data['recentChangesFlags'] ) ) {
 658                         $line .= $this->recentChangesFlags( $data['recentChangesFlags'] );
 659                         unset( $data['recentChangesFlags'] );
 660                 }
 661
 662                 if ( isset( $data['timestampLink'] ) ) {
 663                         $line .= '&#160;' . $data['timestampLink'];
 664                         unset( $data['timestampLink'] );
 665                 }
 666                 $line .= '&#160;</td><td>';
 667
 668                 // everything else: makes it easier for extensions to add or remove data
 669                 $line .= implode( '', $data );
 670
 671                 $line .= "</td></tr></table>\n";
 672
 673                 return $line;
 674         }
 675
 676         /**
 677          * If enhanced RC is in use, this function takes the previously cached
 678          * RC lines, arranges them, and outputs the HTML
 679          *
 680          * @return string
 681          */
 682         protected function recentChangesBlock() {
 683                 if ( count( $this->rc_cache ) == 0 ) {
 684                         return '';
 685                 }
 686
 687                 $blockOut = '';
 688                 foreach ( $this->rc_cache as $block ) {
 689                         if ( count( $block ) < 2 ) {
 690                                 $blockOut .= $this->recentChangesBlockLine( array_shift( $block ) );
 691                         } else {
 692                                 $blockOut .= $this->recentChangesBlockGroup( $block );
 693                         }
 694                 }
 695
 696                 return '<div>' . $blockOut . '</div>';
 697         }
 698
 699         /**
 700          * Returns text for the end of RC
 701          * If enhanced RC is in use, returns pretty much all the text
 702          * @return string
 703          */
 704         public function endRecentChangesList() {
 705                 return $this->recentChangesBlock() . '</div>';
 706         }
 707 }