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                 } elseif ( $this->isCategorizationWithoutRevision( $rcObj ) ) {
 410                         $data['comment'] = $this->insertComment( $rcObj );
 411                 } else {
 412                         # User links
 413                         $data['userLink'] = $rcObj->userlink;
 414                         $data['userTalkLink'] = $rcObj->usertalklink;
 415                         $data['comment'] = $this->insertComment( $rcObj );
 416                 }
 417
 418                 # Rollback
 419                 $data['rollback'] = $this->getRollback( $rcObj );
 420
 421                 # Tags
 422                 $data['tags'] = $this->getTags( $rcObj, $classes );
 423
 424                 // give the hook a chance to modify the data
 425                 $success = Hooks::run( 'EnhancedChangesListModifyLineData',
 426                         array( $this, &$data, $block, $rcObj ) );
 427                 if ( !$success ) {
 428                         // skip entry if hook aborted it
 429                         return '';
 430                 }
 431
 432                 $line = '<tr' . $trClass . '><td></td><td class="mw-enhanced-rc">';
 433                 if ( isset( $data['recentChangesFlags'] ) ) {
 434                         $line .= $this->recentChangesFlags( $data['recentChangesFlags'] );
 435                         unset( $data['recentChangesFlags'] );
 436                 }
 437                 $line .= '&#160;</td><td class="mw-enhanced-rc-nested">';
 438
 439                 if ( isset( $data['timestampLink'] ) ) {
 440                         $line .= '<span class="mw-enhanced-rc-time">' . $data['timestampLink'] . '</span>';
 441                         unset( $data['timestampLink'] );
 442                 }
 443
 444                 // everything else: makes it easier for extensions to add or remove data
 445                 $line .= implode( '', $data );
 446
 447                 $line .= "</td></tr>\n";
 448
 449                 return $line;
 450         }
 451
 452         /**
 453          * Generates amount of changes (linking to diff ) & link to history.
 454          *
 455          * @param array $block
 456          * @param array $queryParams
 457          * @param bool $allLogs
 458          * @param bool $isnew
 459          * @param bool $namehidden
 460          * @return string
 461          */
 462         protected function getLogText( $block, $queryParams, $allLogs, $isnew, $namehidden ) {
 463                 if ( empty( $block ) ) {
 464                         return '';
 465                 }
 466
 467                 # Changes message
 468                 static $nchanges = array();
 469                 static $sinceLastVisitMsg = array();
 470
 471                 $n = count( $block );
 472                 if ( !isset( $nchanges[$n] ) ) {
 473                         $nchanges[$n] = $this->msg( 'nchanges' )->numParams( $n )->escaped();
 474                 }
 475
 476                 $sinceLast = 0;
 477                 $unvisitedOldid = null;
 478                 /** @var $rcObj RCCacheEntry */
 479                 foreach ( $block as $rcObj ) {
 480                         // Same logic as below inside main foreach
 481                         if ( $rcObj->watched && $rcObj->mAttribs['rc_timestamp'] >= $rcObj->watched ) {
 482                                 $sinceLast++;
 483                                 $unvisitedOldid = $rcObj->mAttribs['rc_last_oldid'];
 484                         }
 485                 }
 486                 if ( !isset( $sinceLastVisitMsg[$sinceLast] ) ) {
 487                         $sinceLastVisitMsg[$sinceLast] =
 488                                 $this->msg( 'enhancedrc-since-last-visit' )->numParams( $sinceLast )->escaped();
 489                 }
 490
 491                 $currentRevision = 0;
 492                 foreach ( $block as $rcObj ) {
 493                         if ( !$currentRevision ) {
 494                                 $currentRevision = $rcObj->mAttribs['rc_this_oldid'];
 495                         }
 496                 }
 497
 498                 # Total change link
 499                 $links = array();
 500                 /** @var $block0 RecentChange */
 501                 $block0 = $block[0];
 502                 $last = $block[count( $block ) - 1];
 503                 if ( !$allLogs && $rcObj->mAttribs['rc_type'] != RC_CATEGORIZE ) {
 504                         if ( !ChangesList::userCan( $rcObj, Revision::DELETED_TEXT, $this->getUser() ) ) {
 505                                 $links['total-changes'] = $nchanges[$n];
 506                         } elseif ( $isnew ) {
 507                                 $links['total-changes'] = $nchanges[$n];
 508                         } else {
 509                                 $links['total-changes'] = Linker::link(
 510                                         $block0->getTitle(),
 511                                         $nchanges[$n],
 512                                         array(),
 513                                         $queryParams + array(
 514                                                 'diff' => $currentRevision,
 515                                                 'oldid' => $last->mAttribs['rc_last_oldid'],
 516                                         ),
 517                                         array( 'known', 'noclasses' )
 518                                 );
 519                                 if ( $sinceLast > 0 && $sinceLast < $n ) {
 520                                         $links['total-changes-since-last'] = Linker::link(
 521                                                         $block0->getTitle(),
 522                                                         $sinceLastVisitMsg[$sinceLast],
 523                                                         array(),
 524                                                         $queryParams + array(
 525                                                                 'diff' => $currentRevision,
 526                                                                 'oldid' => $unvisitedOldid,
 527                                                         ),
 528                                                         array( 'known', 'noclasses' )
 529                                                 );
 530                                 }
 531                         }
 532                 }
 533
 534                 # History
 535                 if ( $allLogs || $rcObj->mAttribs['rc_type'] == RC_CATEGORIZE ) {
 536                         // don't show history link for logs
 537                 } elseif ( $namehidden || !$block0->getTitle()->exists() ) {
 538                         $links['history'] = $this->message['enhancedrc-history'];
 539                 } else {
 540                         $params = $queryParams;
 541                         $params['action'] = 'history';
 542
 543                         $links['history'] = Linker::linkKnown(
 544                                         $block0->getTitle(),
 545                                         $this->message['enhancedrc-history'],
 546                                         array(),
 547                                         $params
 548                                 );
 549                 }
 550
 551                 # Allow others to alter, remove or add to these links
 552                 Hooks::run( 'EnhancedChangesList::getLogText',
 553                         array( $this, &$links, $block ) );
 554
 555                 if ( !$links ) {
 556                         return '';
 557                 }
 558
 559                 $logtext = implode( $this->message['pipe-separator'], $links );
 560                 $logtext = $this->msg( 'parentheses' )->rawParams( $logtext )->escaped();
 561                 return ' ' . $logtext;
 562         }
 563
 564         /**
 565          * Enhanced RC ungrouped line.
 566          *
 567          * @param RecentChange|RCCacheEntry $rcObj
 568          * @return string A HTML formatted line (generated using $r)
 569          */
 570         protected function recentChangesBlockLine( $rcObj ) {
 571                 $data = array();
 572
 573                 $query['curid'] = $rcObj->mAttribs['rc_cur_id'];
 574
 575                 $type = $rcObj->mAttribs['rc_type'];
 576                 $logType = $rcObj->mAttribs['rc_log_type'];
 577                 $classes = array( 'mw-enhanced-rc' );
 578                 if ( $logType ) {
 579                         # Log entry
 580                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-log-' . $logType );
 581                 } else {
 582                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-ns' .
 583                                 $rcObj->mAttribs['rc_namespace'] . '-' . $rcObj->mAttribs['rc_title'] );
 584                 }
 585                 $classes[] = $rcObj->watched && $rcObj->mAttribs['rc_timestamp'] >= $rcObj->watched
 586                         ? 'mw-changeslist-line-watched' : 'mw-changeslist-line-not-watched';
 587
 588                 # Flag and Timestamp
 589                 $data['recentChangesFlags'] = array(
 590                         'newpage' => $type == RC_NEW,
 591                         'minor' => $rcObj->mAttribs['rc_minor'],
 592                         'unpatrolled' => $rcObj->unpatrolled,
 593                         'bot' => $rcObj->mAttribs['rc_bot'],
 594                 );
 595                 // timestamp is not really a link here, but is called timestampLink
 596                 // for consistency with EnhancedChangesListModifyLineData
 597                 $data['timestampLink'] = $rcObj->timestamp;
 598
 599                 # Article or log link
 600                 if ( $logType ) {
 601                         $logPage = new LogPage( $logType );
 602                         $logTitle = SpecialPage::getTitleFor( 'Log', $logType );
 603                         $logName = $logPage->getName()->escaped();
 604                         $data['logLink'] = $this->msg( 'parentheses' )
 605                                 ->rawParams( Linker::linkKnown( $logTitle, $logName ) )->escaped();
 606                 } else {
 607                         $data['articleLink'] = $this->getArticleLink( $rcObj, $rcObj->unpatrolled, $rcObj->watched );
 608                 }
 609
 610                 # Diff and hist links
 611                 if ( $type != RC_LOG && $type != RC_CATEGORIZE ) {
 612                         $query['action'] = 'history';
 613                         $data['historyLink'] = $this->getDiffHistLinks( $rcObj, $query );
 614                 }
 615                 $data['separatorAfterLinks'] = ' <span class="mw-changeslist-separator">. .</span> ';
 616
 617                 # Character diff
 618                 if ( $this->getConfig()->get( 'RCShowChangedSize' ) ) {
 619                         $cd = $this->formatCharacterDifference( $rcObj );
 620                         if ( $cd !== '' ) {
 621                                 $data['characterDiff'] = $cd;
 622                                 $data['separatorAftercharacterDiff'] = ' <span class="mw-changeslist-separator">. .</span> ';
 623                         }
 624                 }
 625
 626                 if ( $type == RC_LOG ) {
 627                         $data['logEntry'] = $this->insertLogEntry( $rcObj );
 628                 } elseif ( $this->isCategorizationWithoutRevision( $rcObj ) ) {
 629                         $data['comment'] = $this->insertComment( $rcObj );
 630                 } else {
 631                         $data['userLink'] = $rcObj->userlink;
 632                         $data['userTalkLink'] = $rcObj->usertalklink;
 633                         $data['comment'] = $this->insertComment( $rcObj );
 634                         if ( $type == RC_CATEGORIZE ) {
 635                                 $data['historyLink'] = $this->getDiffHistLinks( $rcObj, $query );
 636                         }
 637                         $data['rollback'] = $this->getRollback( $rcObj );
 638                 }
 639
 640                 # Tags
 641                 $data['tags'] = $this->getTags( $rcObj, $classes );
 642
 643                 # Show how many people are watching this if enabled
 644                 $data['watchingUsers'] = $this->numberofWatchingusers( $rcObj->numberofWatchingusers );
 645
 646                 // give the hook a chance to modify the data
 647                 $success = Hooks::run( 'EnhancedChangesListModifyBlockLineData',
 648                         array( $this, &$data, $rcObj ) );
 649                 if ( !$success ) {
 650                         // skip entry if hook aborted it
 651                         return '';
 652                 }
 653
 654                 $line = Html::openElement( 'table', array( 'class' => $classes ) ) .
 655                         Html::openElement( 'tr' );
 656                 $line .= '<td class="mw-enhanced-rc"><span class="mw-enhancedchanges-arrow-space"></span>';
 657
 658                 if ( isset( $data['recentChangesFlags'] ) ) {
 659                         $line .= $this->recentChangesFlags( $data['recentChangesFlags'] );
 660                         unset( $data['recentChangesFlags'] );
 661                 }
 662
 663                 if ( isset( $data['timestampLink'] ) ) {
 664                         $line .= '&#160;' . $data['timestampLink'];
 665                         unset( $data['timestampLink'] );
 666                 }
 667                 $line .= '&#160;</td><td>';
 668
 669                 // everything else: makes it easier for extensions to add or remove data
 670                 $line .= implode( '', $data );
 671
 672                 $line .= "</td></tr></table>\n";
 673
 674                 return $line;
 675         }
 676
 677         /**
 678          * Returns value to be used in 'historyLink' element of $data param in
 679          * EnhancedChangesListModifyBlockLineData hook.
 680          *
 681          * @since 1.27
 682          *
 683          * @param RCCacheEntry $rc
 684          * @param array $query array of key/value pairs to append as a query string
 685          * @return string HTML
 686          */
 687         public function getDiffHistLinks( RCCacheEntry $rc, array $query ) {
 688                 $pageTitle = $rc->getTitle();
 689                 if ( $rc->getAttribute( 'rc_type' ) == RC_CATEGORIZE ) {
 690                         // For categorizations we must swap the category title with the page title!
 691                         $pageTitle = Title::newFromID( $rc->getAttribute( 'rc_cur_id' ) );
 692                 }
 693
 694                 $retVal = ' ' . $this->msg( 'parentheses' )
 695                                 ->rawParams( $rc->difflink . $this->message['pipe-separator'] . Linker::linkKnown(
 696                                                 $pageTitle,
 697                                                 $this->message['hist'],
 698                                                 array(),
 699                                                 $query
 700                                         ) )->escaped();
 701                 return $retVal;
 702         }
 703
 704         /**
 705          * If enhanced RC is in use, this function takes the previously cached
 706          * RC lines, arranges them, and outputs the HTML
 707          *
 708          * @return string
 709          */
 710         protected function recentChangesBlock() {
 711                 if ( count( $this->rc_cache ) == 0 ) {
 712                         return '';
 713                 }
 714
 715                 $blockOut = '';
 716                 foreach ( $this->rc_cache as $block ) {
 717                         if ( count( $block ) < 2 ) {
 718                                 $blockOut .= $this->recentChangesBlockLine( array_shift( $block ) );
 719                         } else {
 720                                 $blockOut .= $this->recentChangesBlockGroup( $block );
 721                         }
 722                 }
 723
 724                 return '<div>' . $blockOut . '</div>';
 725         }
 726
 727         /**
 728          * Returns text for the end of RC
 729          * If enhanced RC is in use, returns pretty much all the text
 730          * @return string
 731          */
 732         public function endRecentChangesList() {
 733                 return $this->recentChangesBlock() . '</div>';
 734         }
 735 }