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                 $tableClasses = array( 'mw-collapsible', 'mw-collapsed', 'mw-enhanced-rc' );
 165                 if ( $block[0]->mAttribs['rc_log_type'] ) {
 166                         # Log entry
 167                         $tableClasses[] = Sanitizer::escapeClass( 'mw-changeslist-log-'
 168                                 . $block[0]->mAttribs['rc_log_type'] );
 169                 } else {
 170                         $tableClasses[] = Sanitizer::escapeClass( 'mw-changeslist-ns'
 171                                 . $block[0]->mAttribs['rc_namespace'] . '-' . $block[0]->mAttribs['rc_title'] );
 172                 }
 173                 if ( $block[0]->watched
 174                         && $block[0]->mAttribs['rc_timestamp'] >= $block[0]->watched
 175                 ) {
 176                         $tableClasses[] = 'mw-changeslist-line-watched';
 177                 } else {
 178                         $tableClasses[] = 'mw-changeslist-line-not-watched';
 179                 }
 180
 181                 # Collate list of users
 182                 $userlinks = array();
 183                 # Other properties
 184                 $curId = 0;
 185                 # Some catalyst variables...
 186                 $namehidden = true;
 187                 $allLogs = true;
 188                 $RCShowChangedSize = $this->getConfig()->get( 'RCShowChangedSize' );
 189                 $collectedRcFlags = array(
 190                         // All are by bots?
 191                         'bot' => true,
 192                         // Includes a new page?
 193                         'newpage' => false,
 194                         // All are minor edits?
 195                         'minor' => true,
 196                         // Contains an unpatrolled edit?
 197                         'unpatrolled' => false,
 198                 );
 199                 foreach ( $block as $rcObj ) {
 200                         if ( $rcObj->mAttribs['rc_type'] == RC_NEW ) {
 201                                 $collectedRcFlags['newpage'] = true;
 202                         }
 203                         // If all log actions to this page were hidden, then don't
 204                         // give the name of the affected page for this block!
 205                         if ( !$this->isDeleted( $rcObj, LogPage::DELETED_ACTION ) ) {
 206                                 $namehidden = false;
 207                         }
 208                         $u = $rcObj->userlink;
 209                         if ( !isset( $userlinks[$u] ) ) {
 210                                 $userlinks[$u] = 0;
 211                         }
 212                         if ( $rcObj->unpatrolled ) {
 213                                 $collectedRcFlags['unpatrolled'] = true;
 214                         }
 215                         if ( $rcObj->mAttribs['rc_type'] != RC_LOG ) {
 216                                 $allLogs = false;
 217                         }
 218                         # Get the latest entry with a page_id and oldid
 219                         # since logs may not have these.
 220                         if ( !$curId && $rcObj->mAttribs['rc_cur_id'] ) {
 221                                 $curId = $rcObj->mAttribs['rc_cur_id'];
 222                         }
 223
 224                         if ( !$rcObj->mAttribs['rc_bot'] ) {
 225                                 $collectedRcFlags['bot'] = false;
 226                         }
 227                         if ( !$rcObj->mAttribs['rc_minor'] ) {
 228                                 $collectedRcFlags['minor'] = false;
 229                         }
 230
 231                         $userlinks[$u]++;
 232                 }
 233
 234                 # Sort the list and convert to text
 235                 krsort( $userlinks );
 236                 asort( $userlinks );
 237                 $users = array();
 238                 foreach ( $userlinks as $userlink => $count ) {
 239                         $text = $userlink;
 240                         $text .= $this->getLanguage()->getDirMark();
 241                         if ( $count > 1 ) {
 242                                 // @todo FIXME: Hardcoded '×'. Should be a message.
 243                                 $formattedCount = $this->getLanguage()->formatNum( $count ) . '×';
 244                                 $text .= ' ' . $this->msg( 'parentheses' )->rawParams( $formattedCount )->escaped();
 245                         }
 246                         array_push( $users, $text );
 247                 }
 248
 249                 # Article link
 250                 $articleLink = '';
 251                 $revDeletedMsg = false;
 252                 if ( $namehidden ) {
 253                         $revDeletedMsg = $this->msg( 'rev-deleted-event' )->escaped();
 254                 } elseif ( $allLogs ) {
 255                         $articleLink = $this->maybeWatchedLink( $block[0]->link, $block[0]->watched );
 256                 } else {
 257                         $articleLink = $this->getArticleLink( $block[0], $block[0]->unpatrolled, $block[0]->watched );
 258                 }
 259
 260                 $queryParams['curid'] = $curId;
 261
 262                 # Sub-entries
 263                 $lines = array();
 264                 foreach ( $block as $i => $rcObj ) {
 265                         $line = $this->getLineData( $block, $rcObj, $queryParams );
 266                         if ( !$line ) {
 267                                 // completely ignore this RC entry if we don't want to render it
 268                                 unset( $block[$i] );
 269                         }
 270                         $lines[] = $line;
 271                 }
 272                 // Further down are some assumptions that $block is a 0-indexed array
 273                 // with (count-1) as last key. Let's make sure it is.
 274                 $block = array_values( $block );
 275
 276                 if ( empty( $block ) || !$lines ) {
 277                         // if we can't show anything, don't display this block altogether
 278                         return '';
 279                 }
 280
 281                 $logText = $this->getLogText( $block, $queryParams, $allLogs,
 282                         $collectedRcFlags['newpage'], $namehidden
 283                 );
 284
 285                 # Character difference (does not apply if only log items)
 286                 $charDifference = false;
 287                 if ( $RCShowChangedSize && !$allLogs ) {
 288                         $last = 0;
 289                         $first = count( $block ) - 1;
 290                         # Some events (like logs) have an "empty" size, so we need to skip those...
 291                         while ( $last < $first && $block[$last]->mAttribs['rc_new_len'] === null ) {
 292                                 $last++;
 293                         }
 294                         while ( $first > $last && $block[$first]->mAttribs['rc_old_len'] === null ) {
 295                                 $first--;
 296                         }
 297                         # Get net change
 298                         $charDifference = $this->formatCharacterDifference( $block[$first], $block[$last] );
 299                 }
 300
 301                 $numberofWatchingusers = $this->numberofWatchingusers( $block[0]->numberofWatchingusers );
 302                 $usersList = $this->msg( 'brackets' )->rawParams(
 303                         implode( $this->message['semicolon-separator'], $users )
 304                 )->escaped();
 305
 306                 $templateParams = array(
 307                         'articleLink' => $articleLink,
 308                         'charDifference' => $charDifference,
 309                         'collectedRcFlags' => $this->recentChangesFlags( $collectedRcFlags ),
 310                         'languageDirMark' => $this->getLanguage()->getDirMark(),
 311                         'lines' => $lines,
 312                         'logText' => $logText,
 313                         'numberofWatchingusers' => $numberofWatchingusers,
 314                         'rev-deleted-event' => $revDeletedMsg,
 315                         'tableClasses' => $tableClasses,
 316                         'timestamp' => $block[0]->timestamp,
 317                         'users' => $usersList,
 318                 );
 319
 320                 $this->rcCacheIndex++;
 321
 322                 $templateParser = new TemplateParser();
 323                 return $templateParser->processTemplate(
 324                         'EnhancedChangesListGroup',
 325                         $templateParams
 326                 );
 327         }
 328
 329         /**
 330          * @param RCCacheEntry[] $block
 331          * @param RCCacheEntry $rcObj
 332          * @param array $queryParams
 333          * @return array
 334          * @throws Exception
 335          * @throws FatalError
 336          * @throws MWException
 337          */
 338         protected function getLineData( array $block, RCCacheEntry $rcObj, array $queryParams = array() ) {
 339                 $RCShowChangedSize = $this->getConfig()->get( 'RCShowChangedSize' );
 340
 341                 # Classes to apply -- TODO implement
 342                 $classes = array();
 343                 $type = $rcObj->mAttribs['rc_type'];
 344                 $data = array();
 345                 $lineParams = array();
 346
 347                 if ( $rcObj->watched
 348                         && $rcObj->mAttribs['rc_timestamp'] >= $rcObj->watched
 349                 ) {
 350                         $lineParams['classes'] = array( 'mw-enhanced-watched' );
 351                 }
 352                 $separator = ' <span class="mw-changeslist-separator">. .</span> ';
 353
 354                 $data['recentChangesFlags'] = array(
 355                         'newpage' => $type == RC_NEW,
 356                         'minor' => $rcObj->mAttribs['rc_minor'],
 357                         'unpatrolled' => $rcObj->unpatrolled,
 358                         'bot' => $rcObj->mAttribs['rc_bot'],
 359                 );
 360
 361                 $params = $queryParams;
 362
 363                 if ( $rcObj->mAttribs['rc_this_oldid'] != 0 ) {
 364                         $params['oldid'] = $rcObj->mAttribs['rc_this_oldid'];
 365                 }
 366
 367                 # Log timestamp
 368                 if ( $type == RC_LOG ) {
 369                         $link = $rcObj->timestamp;
 370                         # Revision link
 371                 } elseif ( !ChangesList::userCan( $rcObj, Revision::DELETED_TEXT, $this->getUser() ) ) {
 372                         $link = '<span class="history-deleted">' . $rcObj->timestamp . '</span> ';
 373                 } else {
 374                         $link = Linker::linkKnown(
 375                                 $rcObj->getTitle(),
 376                                 $rcObj->timestamp,
 377                                 array(),
 378                                 $params
 379                         );
 380                         if ( $this->isDeleted( $rcObj, Revision::DELETED_TEXT ) ) {
 381                                 $link = '<span class="history-deleted">' . $link . '</span> ';
 382                         }
 383                 }
 384                 $data['timestampLink'] = $link;
 385
 386                 $currentAndLastLinks = '';
 387                 if ( !$type == RC_LOG || $type == RC_NEW ) {
 388                         $currentAndLastLinks .= ' ' . $this->msg( 'parentheses' )->rawParams(
 389                                         $rcObj->curlink .
 390                                         $this->message['pipe-separator'] .
 391                                         $rcObj->lastlink
 392                                 )->escaped();
 393                 }
 394                 $data['currentAndLastLinks'] = $currentAndLastLinks;
 395                 $data['separatorAfterCurrentAndLastLinks'] = $separator;
 396
 397                 # Character diff
 398                 if ( $RCShowChangedSize ) {
 399                         $cd = $this->formatCharacterDifference( $rcObj );
 400                         if ( $cd !== '' ) {
 401                                 $data['characterDiff'] = $cd;
 402                                 $data['separatorAfterCharacterDiff'] = $separator;
 403                         }
 404                 }
 405
 406                 if ( $rcObj->mAttribs['rc_type'] == RC_LOG ) {
 407                         $data['logEntry'] = $this->insertLogEntry( $rcObj );
 408                 } elseif ( $this->isCategorizationWithoutRevision( $rcObj ) ) {
 409                         $data['comment'] = $this->insertComment( $rcObj );
 410                 } else {
 411                         # User links
 412                         $data['userLink'] = $rcObj->userlink;
 413                         $data['userTalkLink'] = $rcObj->usertalklink;
 414                         $data['comment'] = $this->insertComment( $rcObj );
 415                 }
 416
 417                 # Rollback
 418                 $data['rollback'] = $this->getRollback( $rcObj );
 419
 420                 # Tags
 421                 $data['tags'] = $this->getTags( $rcObj, $classes );
 422
 423                 // give the hook a chance to modify the data
 424                 $success = Hooks::run( 'EnhancedChangesListModifyLineData',
 425                         array( $this, &$data, $block, $rcObj ) );
 426                 if ( !$success ) {
 427                         // skip entry if hook aborted it
 428                         return array();
 429                 }
 430
 431                 if ( isset( $data['recentChangesFlags'] ) ) {
 432                         $lineParams['recentChangesFlags'] = $this->recentChangesFlags( $data['recentChangesFlags'] );
 433                         unset( $data['recentChangesFlags'] );
 434                 }
 435
 436                 if ( isset( $data['timestampLink'] ) ) {
 437                         $lineParams['timestampLink'] = $data['timestampLink'];
 438                         unset( $data['timestampLink'] );
 439                 }
 440
 441                 // everything else: makes it easier for extensions to add or remove data
 442                 $lineParams['data'] = array_values( $data );
 443
 444                 return $lineParams;
 445         }
 446
 447         /**
 448          * Generates amount of changes (linking to diff ) & link to history.
 449          *
 450          * @param array $block
 451          * @param array $queryParams
 452          * @param bool $allLogs
 453          * @param bool $isnew
 454          * @param bool $namehidden
 455          * @return string
 456          */
 457         protected function getLogText( $block, $queryParams, $allLogs, $isnew, $namehidden ) {
 458                 if ( empty( $block ) ) {
 459                         return '';
 460                 }
 461
 462                 # Changes message
 463                 static $nchanges = array();
 464                 static $sinceLastVisitMsg = array();
 465
 466                 $n = count( $block );
 467                 if ( !isset( $nchanges[$n] ) ) {
 468                         $nchanges[$n] = $this->msg( 'nchanges' )->numParams( $n )->escaped();
 469                 }
 470
 471                 $sinceLast = 0;
 472                 $unvisitedOldid = null;
 473                 /** @var $rcObj RCCacheEntry */
 474                 foreach ( $block as $rcObj ) {
 475                         // Same logic as below inside main foreach
 476                         if ( $rcObj->watched && $rcObj->mAttribs['rc_timestamp'] >= $rcObj->watched ) {
 477                                 $sinceLast++;
 478                                 $unvisitedOldid = $rcObj->mAttribs['rc_last_oldid'];
 479                         }
 480                 }
 481                 if ( !isset( $sinceLastVisitMsg[$sinceLast] ) ) {
 482                         $sinceLastVisitMsg[$sinceLast] =
 483                                 $this->msg( 'enhancedrc-since-last-visit' )->numParams( $sinceLast )->escaped();
 484                 }
 485
 486                 $currentRevision = 0;
 487                 foreach ( $block as $rcObj ) {
 488                         if ( !$currentRevision ) {
 489                                 $currentRevision = $rcObj->mAttribs['rc_this_oldid'];
 490                         }
 491                 }
 492
 493                 # Total change link
 494                 $links = array();
 495                 /** @var $block0 RecentChange */
 496                 $block0 = $block[0];
 497                 $last = $block[count( $block ) - 1];
 498                 if ( !$allLogs && $rcObj->mAttribs['rc_type'] != RC_CATEGORIZE ) {
 499                         if ( !ChangesList::userCan( $rcObj, Revision::DELETED_TEXT, $this->getUser() ) ) {
 500                                 $links['total-changes'] = $nchanges[$n];
 501                         } elseif ( $isnew ) {
 502                                 $links['total-changes'] = $nchanges[$n];
 503                         } else {
 504                                 $links['total-changes'] = Linker::link(
 505                                         $block0->getTitle(),
 506                                         $nchanges[$n],
 507                                         array(),
 508                                         $queryParams + array(
 509                                                 'diff' => $currentRevision,
 510                                                 'oldid' => $last->mAttribs['rc_last_oldid'],
 511                                         ),
 512                                         array( 'known', 'noclasses' )
 513                                 );
 514                                 if ( $sinceLast > 0 && $sinceLast < $n ) {
 515                                         $links['total-changes-since-last'] = Linker::link(
 516                                                         $block0->getTitle(),
 517                                                         $sinceLastVisitMsg[$sinceLast],
 518                                                         array(),
 519                                                         $queryParams + array(
 520                                                                 'diff' => $currentRevision,
 521                                                                 'oldid' => $unvisitedOldid,
 522                                                         ),
 523                                                         array( 'known', 'noclasses' )
 524                                                 );
 525                                 }
 526                         }
 527                 }
 528
 529                 # History
 530                 if ( $allLogs || $rcObj->mAttribs['rc_type'] == RC_CATEGORIZE ) {
 531                         // don't show history link for logs
 532                 } elseif ( $namehidden || !$block0->getTitle()->exists() ) {
 533                         $links['history'] = $this->message['enhancedrc-history'];
 534                 } else {
 535                         $params = $queryParams;
 536                         $params['action'] = 'history';
 537
 538                         $links['history'] = Linker::linkKnown(
 539                                         $block0->getTitle(),
 540                                         $this->message['enhancedrc-history'],
 541                                         array(),
 542                                         $params
 543                                 );
 544                 }
 545
 546                 # Allow others to alter, remove or add to these links
 547                 Hooks::run( 'EnhancedChangesList::getLogText',
 548                         array( $this, &$links, $block ) );
 549
 550                 if ( !$links ) {
 551                         return '';
 552                 }
 553
 554                 $logtext = implode( $this->message['pipe-separator'], $links );
 555                 $logtext = $this->msg( 'parentheses' )->rawParams( $logtext )->escaped();
 556                 return ' ' . $logtext;
 557         }
 558
 559         /**
 560          * Enhanced RC ungrouped line.
 561          *
 562          * @param RecentChange|RCCacheEntry $rcObj
 563          * @return string A HTML formatted line (generated using $r)
 564          */
 565         protected function recentChangesBlockLine( $rcObj ) {
 566                 $data = array();
 567
 568                 $query['curid'] = $rcObj->mAttribs['rc_cur_id'];
 569
 570                 $type = $rcObj->mAttribs['rc_type'];
 571                 $logType = $rcObj->mAttribs['rc_log_type'];
 572                 $classes = array( 'mw-enhanced-rc' );
 573                 if ( $logType ) {
 574                         # Log entry
 575                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-log-' . $logType );
 576                 } else {
 577                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-ns' .
 578                                 $rcObj->mAttribs['rc_namespace'] . '-' . $rcObj->mAttribs['rc_title'] );
 579                 }
 580                 $classes[] = $rcObj->watched && $rcObj->mAttribs['rc_timestamp'] >= $rcObj->watched
 581                         ? 'mw-changeslist-line-watched' : 'mw-changeslist-line-not-watched';
 582
 583                 # Flag and Timestamp
 584                 $data['recentChangesFlags'] = array(
 585                         'newpage' => $type == RC_NEW,
 586                         'minor' => $rcObj->mAttribs['rc_minor'],
 587                         'unpatrolled' => $rcObj->unpatrolled,
 588                         'bot' => $rcObj->mAttribs['rc_bot'],
 589                 );
 590                 // timestamp is not really a link here, but is called timestampLink
 591                 // for consistency with EnhancedChangesListModifyLineData
 592                 $data['timestampLink'] = $rcObj->timestamp;
 593
 594                 # Article or log link
 595                 if ( $logType ) {
 596                         $logPage = new LogPage( $logType );
 597                         $logTitle = SpecialPage::getTitleFor( 'Log', $logType );
 598                         $logName = $logPage->getName()->escaped();
 599                         $data['logLink'] = $this->msg( 'parentheses' )
 600                                 ->rawParams( Linker::linkKnown( $logTitle, $logName ) )->escaped();
 601                 } else {
 602                         $data['articleLink'] = $this->getArticleLink( $rcObj, $rcObj->unpatrolled, $rcObj->watched );
 603                 }
 604
 605                 # Diff and hist links
 606                 if ( $type != RC_LOG && $type != RC_CATEGORIZE ) {
 607                         $query['action'] = 'history';
 608                         $data['historyLink'] = $this->getDiffHistLinks( $rcObj, $query );
 609                 }
 610                 $data['separatorAfterLinks'] = ' <span class="mw-changeslist-separator">. .</span> ';
 611
 612                 # Character diff
 613                 if ( $this->getConfig()->get( 'RCShowChangedSize' ) ) {
 614                         $cd = $this->formatCharacterDifference( $rcObj );
 615                         if ( $cd !== '' ) {
 616                                 $data['characterDiff'] = $cd;
 617                                 $data['separatorAftercharacterDiff'] = ' <span class="mw-changeslist-separator">. .</span> ';
 618                         }
 619                 }
 620
 621                 if ( $type == RC_LOG ) {
 622                         $data['logEntry'] = $this->insertLogEntry( $rcObj );
 623                 } elseif ( $this->isCategorizationWithoutRevision( $rcObj ) ) {
 624                         $data['comment'] = $this->insertComment( $rcObj );
 625                 } else {
 626                         $data['userLink'] = $rcObj->userlink;
 627                         $data['userTalkLink'] = $rcObj->usertalklink;
 628                         $data['comment'] = $this->insertComment( $rcObj );
 629                         if ( $type == RC_CATEGORIZE ) {
 630                                 $data['historyLink'] = $this->getDiffHistLinks( $rcObj, $query );
 631                         }
 632                         $data['rollback'] = $this->getRollback( $rcObj );
 633                 }
 634
 635                 # Tags
 636                 $data['tags'] = $this->getTags( $rcObj, $classes );
 637
 638                 # Show how many people are watching this if enabled
 639                 $data['watchingUsers'] = $this->numberofWatchingusers( $rcObj->numberofWatchingusers );
 640
 641                 // give the hook a chance to modify the data
 642                 $success = Hooks::run( 'EnhancedChangesListModifyBlockLineData',
 643                         array( $this, &$data, $rcObj ) );
 644                 if ( !$success ) {
 645                         // skip entry if hook aborted it
 646                         return '';
 647                 }
 648
 649                 $line = Html::openElement( 'table', array( 'class' => $classes ) ) .
 650                         Html::openElement( 'tr' );
 651                 $line .= '<td class="mw-enhanced-rc"><span class="mw-enhancedchanges-arrow-space"></span>';
 652
 653                 if ( isset( $data['recentChangesFlags'] ) ) {
 654                         $line .= $this->recentChangesFlags( $data['recentChangesFlags'] );
 655                         unset( $data['recentChangesFlags'] );
 656                 }
 657
 658                 if ( isset( $data['timestampLink'] ) ) {
 659                         $line .= '&#160;' . $data['timestampLink'];
 660                         unset( $data['timestampLink'] );
 661                 }
 662                 $line .= '&#160;</td><td>';
 663
 664                 // everything else: makes it easier for extensions to add or remove data
 665                 $line .= implode( '', $data );
 666
 667                 $line .= "</td></tr></table>\n";
 668
 669                 return $line;
 670         }
 671
 672         /**
 673          * Returns value to be used in 'historyLink' element of $data param in
 674          * EnhancedChangesListModifyBlockLineData hook.
 675          *
 676          * @since 1.27
 677          *
 678          * @param RCCacheEntry $rc
 679          * @param array $query array of key/value pairs to append as a query string
 680          * @return string HTML
 681          */
 682         public function getDiffHistLinks( RCCacheEntry $rc, array $query ) {
 683                 $pageTitle = $rc->getTitle();
 684                 if ( $rc->getAttribute( 'rc_type' ) == RC_CATEGORIZE ) {
 685                         // For categorizations we must swap the category title with the page title!
 686                         $pageTitle = Title::newFromID( $rc->getAttribute( 'rc_cur_id' ) );
 687                 }
 688
 689                 $retVal = ' ' . $this->msg( 'parentheses' )
 690                                 ->rawParams( $rc->difflink . $this->message['pipe-separator'] . Linker::linkKnown(
 691                                                 $pageTitle,
 692                                                 $this->message['hist'],
 693                                                 array(),
 694                                                 $query
 695                                         ) )->escaped();
 696                 return $retVal;
 697         }
 698
 699         /**
 700          * If enhanced RC is in use, this function takes the previously cached
 701          * RC lines, arranges them, and outputs the HTML
 702          *
 703          * @return string
 704          */
 705         protected function recentChangesBlock() {
 706                 if ( count( $this->rc_cache ) == 0 ) {
 707                         return '';
 708                 }
 709
 710                 $blockOut = '';
 711                 foreach ( $this->rc_cache as $block ) {
 712                         if ( count( $block ) < 2 ) {
 713                                 $blockOut .= $this->recentChangesBlockLine( array_shift( $block ) );
 714                         } else {
 715                                 $blockOut .= $this->recentChangesBlockGroup( $block );
 716                         }
 717                 }
 718
 719                 return '<div>' . $blockOut . '</div>';
 720         }
 721
 722         /**
 723          * Returns text for the end of RC
 724          * If enhanced RC is in use, returns pretty much all the text
 725          * @return string
 726          */
 727         public function endRecentChangesList() {
 728                 return $this->recentChangesBlock() . '</div>';
 729         }
 730 }