includes/ChangesList.php

   1 <?php
   2 /**
   3  * Classes to show lists of changes.
   4  *
   5  * These can be:
   6  * - watchlist
   7  * - related changes
   8  * - recent changes
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License along
  21  * with this program; if not, write to the Free Software Foundation, Inc.,
  22  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  23  * http://www.gnu.org/copyleft/gpl.html
  24  *
  25  * @file
  26  */
  27
  28 /**
  29  * @todo document
  30  */
  31 class RCCacheEntry extends RecentChange {
  32         var $secureName, $link;
  33         var $curlink, $difflink, $lastlink, $usertalklink, $versionlink;
  34         var $userlink, $timestamp, $watched;
  35
  36         /**
  37          * @param $rc RecentChange
  38          * @return RCCacheEntry
  39          */
  40         static function newFromParent( $rc ) {
  41                 $rc2 = new RCCacheEntry;
  42                 $rc2->mAttribs = $rc->mAttribs;
  43                 $rc2->mExtra = $rc->mExtra;
  44                 return $rc2;
  45         }
  46 }
  47
  48 /**
  49  * Base class for all changes lists
  50  */
  51 class ChangesList extends ContextSource {
  52
  53         /**
  54          * @var Skin
  55          */
  56         public $skin;
  57
  58         protected $watchlist = false;
  59
  60         protected $message;
  61
  62         /**
  63          * Changeslist constructor
  64          *
  65          * @param $obj Skin or IContextSource
  66          */
  67         public function __construct( $obj ) {
  68                 if ( $obj instanceof IContextSource ) {
  69                         $this->setContext( $obj );
  70                         $this->skin = $obj->getSkin();
  71                 } else {
  72                         $this->setContext( $obj->getContext() );
  73                         $this->skin = $obj;
  74                 }
  75                 $this->preCacheMessages();
  76         }
  77
  78         /**
  79          * Fetch an appropriate changes list class for the main context
  80          * This first argument used to be an User object.
  81          *
  82          * @deprecated in 1.18; use newFromContext() instead
  83          * @param string|User $unused Unused
  84          * @return ChangesList|EnhancedChangesList|OldChangesList derivative
  85          */
  86         public static function newFromUser( $unused ) {
  87                 wfDeprecated( __METHOD__, '1.18' );
  88                 return self::newFromContext( RequestContext::getMain() );
  89         }
  90
  91         /**
  92          * Fetch an appropriate changes list class for the specified context
  93          * Some users might want to use an enhanced list format, for instance
  94          *
  95          * @param $context IContextSource to use
  96          * @return ChangesList|EnhancedChangesList|OldChangesList derivative
  97          */
  98         public static function newFromContext( IContextSource $context ) {
  99                 $user = $context->getUser();
 100                 $sk = $context->getSkin();
 101                 $list = null;
 102                 if ( wfRunHooks( 'FetchChangesList', array( $user, &$sk, &$list ) ) ) {
 103                         $new = $context->getRequest()->getBool( 'enhanced', $user->getOption( 'usenewrc' ) );
 104                         return $new ? new EnhancedChangesList( $context ) : new OldChangesList( $context );
 105                 } else {
 106                         return $list;
 107                 }
 108         }
 109
 110         /**
 111          * Sets the list to use a "<li class='watchlist-(namespace)-(page)'>" tag
 112          * @param $value Boolean
 113          */
 114         public function setWatchlistDivs( $value = true ) {
 115                 $this->watchlist = $value;
 116         }
 117
 118         /**
 119          * As we use the same small set of messages in various methods and that
 120          * they are called often, we call them once and save them in $this->message
 121          */
 122         private function preCacheMessages() {
 123                 if ( !isset( $this->message ) ) {
 124                         foreach ( array(
 125                                 'cur', 'diff', 'hist', 'last', 'blocklink', 'history',
 126                                 'semicolon-separator', 'pipe-separator' ) as $msg
 127                         ) {
 128                                 $this->message[$msg] = $this->msg( $msg )->escaped();
 129                         }
 130                 }
 131         }
 132
 133         /**
 134          * Returns the appropriate flags for new page, minor change and patrolling
 135          * @param array $flags Associative array of 'flag' => Bool
 136          * @param string $nothing to use for empty space
 137          * @return String
 138          */
 139         protected function recentChangesFlags( $flags, $nothing = '&#160;' ) {
 140                 $f = '';
 141                 foreach ( array( 'newpage', 'minor', 'bot', 'unpatrolled' ) as $flag ) {
 142                         $f .= isset( $flags[$flag] ) && $flags[$flag]
 143                                 ? self::flag( $flag )
 144                                 : $nothing;
 145                 }
 146                 return $f;
 147         }
 148
 149         /**
 150          * Provide the "<abbr>" element appropriate to a given abbreviated flag,
 151          * namely the flag indicating a new page, a minor edit, a bot edit, or an
 152          * unpatrolled edit.  By default in English it will contain "N", "m", "b",
 153          * "!" respectively, plus it will have an appropriate title and class.
 154          *
 155          * @param string $flag 'newpage', 'unpatrolled', 'minor', or 'bot'
 156          * @return String: Raw HTML
 157          */
 158         public static function flag( $flag ) {
 159                 static $messages = null;
 160                 if ( is_null( $messages ) ) {
 161                         $messages = array(
 162                                 'newpage' => array( 'newpageletter', 'recentchanges-label-newpage' ),
 163                                 'minoredit' => array( 'minoreditletter', 'recentchanges-label-minor' ),
 164                                 'botedit' => array( 'boteditletter', 'recentchanges-label-bot' ),
 165                                 'unpatrolled' => array( 'unpatrolledletter', 'recentchanges-label-unpatrolled' ),
 166                         );
 167                         foreach ( $messages as &$value ) {
 168                                 $value[0] = wfMessage( $value[0] )->escaped();
 169                                 $value[1] = wfMessage( $value[1] )->escaped();
 170                         }
 171                 }
 172
 173                 # Inconsistent naming, bleh
 174                 $map = array(
 175                         'newpage' => 'newpage',
 176                         'minor' => 'minoredit',
 177                         'bot' => 'botedit',
 178                         'unpatrolled' => 'unpatrolled',
 179                         'minoredit' => 'minoredit',
 180                         'botedit' => 'botedit',
 181                 );
 182                 $flag = $map[$flag];
 183
 184                 return "<abbr class='$flag' title='" . $messages[$flag][1] . "'>" . $messages[$flag][0] . '</abbr>';
 185         }
 186
 187         /**
 188          * Returns text for the start of the tabular part of RC
 189          * @return String
 190          */
 191         public function beginRecentChangesList() {
 192                 $this->rc_cache = array();
 193                 $this->rcMoveIndex = 0;
 194                 $this->rcCacheIndex = 0;
 195                 $this->lastdate = '';
 196                 $this->rclistOpen = false;
 197                 $this->getOutput()->addModules( 'mediawiki.special.changeslist' );
 198                 return '';
 199         }
 200
 201         /**
 202          * Show formatted char difference
 203          * @param $old Integer: bytes
 204          * @param $new Integer: bytes
 205          * @param $context IContextSource context to use
 206          * @return String
 207          */
 208         public static function showCharacterDifference( $old, $new, IContextSource $context = null ) {
 209                 global $wgRCChangedSizeThreshold, $wgMiserMode;
 210
 211                 if ( !$context ) {
 212                         $context = RequestContext::getMain();
 213                 }
 214
 215                 $new = (int)$new;
 216                 $old = (int)$old;
 217                 $szdiff = $new - $old;
 218
 219                 $lang = $context->getLanguage();
 220                 $code = $lang->getCode();
 221                 static $fastCharDiff = array();
 222                 if ( !isset( $fastCharDiff[$code] ) ) {
 223                         $fastCharDiff[$code] = $wgMiserMode || $context->msg( 'rc-change-size' )->plain() === '$1';
 224                 }
 225
 226                 $formattedSize = $lang->formatNum( $szdiff );
 227
 228                 if ( !$fastCharDiff[$code] ) {
 229                         $formattedSize = $context->msg( 'rc-change-size', $formattedSize )->text();
 230                 }
 231
 232                 if ( abs( $szdiff ) > abs( $wgRCChangedSizeThreshold ) ) {
 233                         $tag = 'strong';
 234                 } else {
 235                         $tag = 'span';
 236                 }
 237
 238                 if ( $szdiff === 0 ) {
 239                         $formattedSizeClass = 'mw-plusminus-null';
 240                 }
 241                 if ( $szdiff > 0 ) {
 242                         $formattedSize = '+' . $formattedSize;
 243                         $formattedSizeClass = 'mw-plusminus-pos';
 244                 }
 245                 if ( $szdiff < 0 ) {
 246                         $formattedSizeClass = 'mw-plusminus-neg';
 247                 }
 248
 249                 $formattedTotalSize = $context->msg( 'rc-change-size-new' )->numParams( $new )->text();
 250
 251                 return Html::element( $tag,
 252                         array( 'dir' => 'ltr', 'class' => $formattedSizeClass, 'title' => $formattedTotalSize ),
 253                         $context->msg( 'parentheses', $formattedSize )->plain() ) . $lang->getDirMark();
 254         }
 255
 256         /**
 257          * Format the character difference of one or several changes.
 258          *
 259          * @param $old RecentChange
 260          * @param $new RecentChange last change to use, if not provided, $old will be used
 261          * @return string HTML fragment
 262          */
 263         public function formatCharacterDifference( RecentChange $old, RecentChange $new = null ) {
 264                 $oldlen = $old->mAttribs['rc_old_len'];
 265
 266                 if ( $new ) {
 267                         $newlen = $new->mAttribs['rc_new_len'];
 268                 } else {
 269                         $newlen = $old->mAttribs['rc_new_len'];
 270                 }
 271
 272                 if ( $oldlen === null || $newlen === null ) {
 273                         return '';
 274                 }
 275
 276                 return self::showCharacterDifference( $oldlen, $newlen, $this->getContext() );
 277         }
 278
 279         /**
 280          * Returns text for the end of RC
 281          * @return String
 282          */
 283         public function endRecentChangesList() {
 284                 if ( $this->rclistOpen ) {
 285                         return "</ul>\n";
 286                 } else {
 287                         return '';
 288                 }
 289         }
 290
 291         /**
 292          * @param string $s HTML to update
 293          * @param $rc_timestamp mixed
 294          */
 295         public function insertDateHeader( &$s, $rc_timestamp ) {
 296                 # Make date header if necessary
 297                 $date = $this->getLanguage()->userDate( $rc_timestamp, $this->getUser() );
 298                 if ( $date != $this->lastdate ) {
 299                         if ( $this->lastdate != '' ) {
 300                                 $s .= "</ul>\n";
 301                         }
 302                         $s .= Xml::element( 'h4', null, $date ) . "\n<ul class=\"special\">";
 303                         $this->lastdate = $date;
 304                         $this->rclistOpen = true;
 305                 }
 306         }
 307
 308         /**
 309          * @param string $s HTML to update
 310          * @param $title Title
 311          * @param $logtype string
 312          */
 313         public function insertLog( &$s, $title, $logtype ) {
 314                 $page = new LogPage( $logtype );
 315                 $logname = $page->getName()->escaped();
 316                 $s .= $this->msg( 'parentheses' )->rawParams( Linker::linkKnown( $title, $logname ) )->escaped();
 317         }
 318
 319         /**
 320          * @param string $s HTML to update
 321          * @param $rc RecentChange
 322          * @param $unpatrolled
 323          */
 324         public function insertDiffHist( &$s, &$rc, $unpatrolled ) {
 325                 # Diff link
 326                 if ( $rc->mAttribs['rc_type'] == RC_NEW || $rc->mAttribs['rc_type'] == RC_LOG ) {
 327                         $diffLink = $this->message['diff'];
 328                 } elseif ( !self::userCan( $rc, Revision::DELETED_TEXT, $this->getUser() ) ) {
 329                         $diffLink = $this->message['diff'];
 330                 } else {
 331                         $query = array(
 332                                 'curid' => $rc->mAttribs['rc_cur_id'],
 333                                 'diff' => $rc->mAttribs['rc_this_oldid'],
 334                                 'oldid' => $rc->mAttribs['rc_last_oldid']
 335                         );
 336
 337                         $diffLink = Linker::linkKnown(
 338                                 $rc->getTitle(),
 339                                 $this->message['diff'],
 340                                 array( 'tabindex' => $rc->counter ),
 341                                 $query
 342                         );
 343                 }
 344                 $diffhist = $diffLink . $this->message['pipe-separator'];
 345                 # History link
 346                 $diffhist .= Linker::linkKnown(
 347                         $rc->getTitle(),
 348                         $this->message['hist'],
 349                         array(),
 350                         array(
 351                                 'curid' => $rc->mAttribs['rc_cur_id'],
 352                                 'action' => 'history'
 353                         )
 354                 );
 355                 $s .= $this->msg( 'parentheses' )->rawParams( $diffhist )->escaped() . ' <span class="mw-changeslist-separator">. .</span> ';
 356         }
 357
 358         /**
 359          * @param string $s HTML to update
 360          * @param $rc RecentChange
 361          * @param $unpatrolled
 362          * @param $watched
 363          */
 364         public function insertArticleLink( &$s, &$rc, $unpatrolled, $watched ) {
 365                 # If it's a new article, there is no diff link, but if it hasn't been
 366                 # patrolled yet, we need to give users a way to do so
 367                 $params = array();
 368
 369                 $articlelink = Linker::linkKnown(
 370                         $rc->getTitle(),
 371                         null,
 372                         array( 'class' => 'mw-changeslist-title' ),
 373                         $params
 374                 );
 375                 if ( $this->isDeleted( $rc, Revision::DELETED_TEXT ) ) {
 376                         $articlelink = '<span class="history-deleted">' . $articlelink . '</span>';
 377                 }
 378                 # To allow for boldening pages watched by this user
 379                 $articlelink = "<span class=\"mw-title\">{$articlelink}</span>";
 380                 # RTL/LTR marker
 381                 $articlelink .= $this->getLanguage()->getDirMark();
 382
 383                 wfRunHooks( 'ChangesListInsertArticleLink',
 384                         array( &$this, &$articlelink, &$s, &$rc, $unpatrolled, $watched ) );
 385
 386                 $s .= " $articlelink";
 387         }
 388
 389         /**
 390          * Get the timestamp from $rc formatted with current user's settings
 391          * and a separator
 392          *
 393          * @param $rc RecentChange
 394          * @return string HTML fragment
 395          */
 396         public function getTimestamp( $rc ) {
 397                 return $this->message['semicolon-separator'] . '<span class="mw-changeslist-date">' .
 398                         $this->getLanguage()->userTime( $rc->mAttribs['rc_timestamp'], $this->getUser() ) . '</span> <span class="mw-changeslist-separator">. .</span> ';
 399         }
 400
 401         /**
 402          * Insert time timestamp string from $rc into $s
 403          *
 404          * @param string $s HTML to update
 405          * @param $rc RecentChange
 406          */
 407         public function insertTimestamp( &$s, $rc ) {
 408                 $s .= $this->getTimestamp( $rc );
 409         }
 410
 411         /**
 412          * Insert links to user page, user talk page and eventually a blocking link
 413          *
 414          * @param &$s String HTML to update
 415          * @param &$rc RecentChange
 416          */
 417         public function insertUserRelatedLinks( &$s, &$rc ) {
 418                 if ( $this->isDeleted( $rc, Revision::DELETED_USER ) ) {
 419                         $s .= ' <span class="history-deleted">' . $this->msg( 'rev-deleted-user' )->escaped() . '</span>';
 420                 } else {
 421                         $s .= $this->getLanguage()->getDirMark() . Linker::userLink( $rc->mAttribs['rc_user'],
 422                                 $rc->mAttribs['rc_user_text'] );
 423                         $s .= Linker::userToolLinks( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 424                 }
 425         }
 426
 427         /**
 428          * Insert a formatted action
 429          *
 430          * @param $rc RecentChange
 431          * @return string
 432          */
 433         public function insertLogEntry( $rc ) {
 434                 $formatter = LogFormatter::newFromRow( $rc->mAttribs );
 435                 $formatter->setContext( $this->getContext() );
 436                 $formatter->setShowUserToolLinks( true );
 437                 $mark = $this->getLanguage()->getDirMark();
 438                 return $formatter->getActionText() . " $mark" . $formatter->getComment();
 439         }
 440
 441         /**
 442          * Insert a formatted comment
 443          * @param $rc RecentChange
 444          * @return string
 445          */
 446         public function insertComment( $rc ) {
 447                 if ( $rc->mAttribs['rc_type'] != RC_MOVE && $rc->mAttribs['rc_type'] != RC_MOVE_OVER_REDIRECT ) {
 448                         if ( $this->isDeleted( $rc, Revision::DELETED_COMMENT ) ) {
 449                                 return ' <span class="history-deleted">' . $this->msg( 'rev-deleted-comment' )->escaped() . '</span>';
 450                         } else {
 451                                 return Linker::commentBlock( $rc->mAttribs['rc_comment'], $rc->getTitle() );
 452                         }
 453                 }
 454                 return '';
 455         }
 456
 457         /**
 458          * Check whether to enable recent changes patrol features
 459          * @return Boolean
 460          */
 461         public static function usePatrol() {
 462                 global $wgUser;
 463                 return $wgUser->useRCPatrol();
 464         }
 465
 466         /**
 467          * Returns the string which indicates the number of watching users
 468          * @return string
 469          */
 470         protected function numberofWatchingusers( $count ) {
 471                 static $cache = array();
 472                 if ( $count > 0 ) {
 473                         if ( !isset( $cache[$count] ) ) {
 474                                 $cache[$count] = $this->msg( 'number_of_watching_users_RCview' )->numParams( $count )->escaped();
 475                         }
 476                         return $cache[$count];
 477                 } else {
 478                         return '';
 479                 }
 480         }
 481
 482         /**
 483          * Determine if said field of a revision is hidden
 484          * @param $rc RCCacheEntry
 485          * @param $field Integer: one of DELETED_* bitfield constants
 486          * @return Boolean
 487          */
 488         public static function isDeleted( $rc, $field ) {
 489                 return ( $rc->mAttribs['rc_deleted'] & $field ) == $field;
 490         }
 491
 492         /**
 493          * Determine if the current user is allowed to view a particular
 494          * field of this revision, if it's marked as deleted.
 495          * @param $rc RCCacheEntry
 496          * @param $field Integer
 497          * @param $user User object to check, or null to use $wgUser
 498          * @return Boolean
 499          */
 500         public static function userCan( $rc, $field, User $user = null ) {
 501                 if ( $rc->mAttribs['rc_type'] == RC_LOG ) {
 502                         return LogEventsList::userCanBitfield( $rc->mAttribs['rc_deleted'], $field, $user );
 503                 } else {
 504                         return Revision::userCanBitfield( $rc->mAttribs['rc_deleted'], $field, $user );
 505                 }
 506         }
 507
 508         /**
 509          * @param $link string
 510          * @param $watched bool
 511          * @return string
 512          */
 513         protected function maybeWatchedLink( $link, $watched = false ) {
 514                 if ( $watched ) {
 515                         return '<strong class="mw-watched">' . $link . '</strong>';
 516                 } else {
 517                         return '<span class="mw-rc-unwatched">' . $link . '</span>';
 518                 }
 519         }
 520
 521         /** Inserts a rollback link
 522          *
 523          * @param $s string
 524          * @param $rc RecentChange
 525          */
 526         public function insertRollback( &$s, &$rc ) {
 527                 if ( $rc->mAttribs['rc_type'] != RC_NEW && $rc->mAttribs['rc_this_oldid'] && $rc->mAttribs['rc_cur_id'] ) {
 528                         $page = $rc->getTitle();
 529                         /** Check for rollback and edit permissions, disallow special pages, and only
 530                           * show a link on the top-most revision */
 531                         if ( $this->getUser()->isAllowed( 'rollback' ) && $rc->mAttribs['page_latest'] == $rc->mAttribs['rc_this_oldid'] )
 532                         {
 533                                 $rev = new Revision( array(
 534                                         'title' => $page,
 535                                         'id' => $rc->mAttribs['rc_this_oldid'],
 536                                         'user' => $rc->mAttribs['rc_user'],
 537                                         'user_text' => $rc->mAttribs['rc_user_text'],
 538                                         'deleted' => $rc->mAttribs['rc_deleted']
 539                                 ) );
 540                                 $s .= ' ' . Linker::generateRollback( $rev, $this->getContext() );
 541                         }
 542                 }
 543         }
 544
 545         /**
 546          * @param $s string
 547          * @param $rc RecentChange
 548          * @param $classes
 549          */
 550         public function insertTags( &$s, &$rc, &$classes ) {
 551                 if ( empty( $rc->mAttribs['ts_tags'] ) ) {
 552                         return;
 553                 }
 554
 555                 list( $tagSummary, $newClasses ) = ChangeTags::formatSummaryRow( $rc->mAttribs['ts_tags'], 'changeslist' );
 556                 $classes = array_merge( $classes, $newClasses );
 557                 $s .= ' ' . $tagSummary;
 558         }
 559
 560         public function insertExtra( &$s, &$rc, &$classes ) {
 561                 // Empty, used for subclasses to add anything special.
 562         }
 563
 564         protected function showAsUnpatrolled( RecentChange $rc ) {
 565                 $unpatrolled = false;
 566                 if ( !$rc->mAttribs['rc_patrolled'] ) {
 567                         if ( $this->getUser()->useRCPatrol() ) {
 568                                 $unpatrolled = true;
 569                         } elseif ( $this->getUser()->useNPPatrol() && $rc->mAttribs['rc_type'] == RC_NEW ) {
 570                                 $unpatrolled = true;
 571                         }
 572                 }
 573                 return $unpatrolled;
 574         }
 575 }
 576
 577 /**
 578  * Generate a list of changes using the good old system (no javascript)
 579  */
 580 class OldChangesList extends ChangesList {
 581         /**
 582          * Format a line using the old system (aka without any javascript).
 583          *
 584          * @param $rc RecentChange, passed by reference
 585          * @param bool $watched (default false)
 586          * @param int $linenumber (default null)
 587          *
 588          * @return string|bool
 589          */
 590         public function recentChangesLine( &$rc, $watched = false, $linenumber = null ) {
 591                 global $wgRCShowChangedSize;
 592                 wfProfileIn( __METHOD__ );
 593
 594                 # Should patrol-related stuff be shown?
 595                 $unpatrolled = $this->showAsUnpatrolled( $rc );
 596
 597                 $dateheader = ''; // $s now contains only <li>...</li>, for hooks' convenience.
 598                 $this->insertDateHeader( $dateheader, $rc->mAttribs['rc_timestamp'] );
 599
 600                 $s = '';
 601                 $classes = array();
 602                 // use mw-line-even/mw-line-odd class only if linenumber is given (feature from bug 14468)
 603                 if ( $linenumber ) {
 604                         if ( $linenumber & 1 ) {
 605                                 $classes[] = 'mw-line-odd';
 606                         } else {
 607                                 $classes[] = 'mw-line-even';
 608                         }
 609                 }
 610
 611                 // Indicate watched status on the line to allow for more
 612                 // comprehensive styling.
 613                 $classes[] = $watched && $rc->mAttribs['rc_timestamp'] >= $watched
 614                         ? 'mw-changeslist-line-watched' : 'mw-changeslist-line-not-watched';
 615
 616                 // Moved pages (very very old, not supported anymore)
 617                 if ( $rc->mAttribs['rc_type'] == RC_MOVE || $rc->mAttribs['rc_type'] == RC_MOVE_OVER_REDIRECT ) {
 618                 // Log entries
 619                 } elseif ( $rc->mAttribs['rc_log_type'] ) {
 620                         $logtitle = SpecialPage::getTitleFor( 'Log', $rc->mAttribs['rc_log_type'] );
 621                         $this->insertLog( $s, $logtitle, $rc->mAttribs['rc_log_type'] );
 622                 // Log entries (old format) or log targets, and special pages
 623                 } elseif ( $rc->mAttribs['rc_namespace'] == NS_SPECIAL ) {
 624                         list( $name, $subpage ) = SpecialPageFactory::resolveAlias( $rc->mAttribs['rc_title'] );
 625                         if ( $name == 'Log' ) {
 626                                 $this->insertLog( $s, $rc->getTitle(), $subpage );
 627                         }
 628                 // Regular entries
 629                 } else {
 630                         $this->insertDiffHist( $s, $rc, $unpatrolled );
 631                         # M, N, b and ! (minor, new, bot and unpatrolled)
 632                         $s .= $this->recentChangesFlags(
 633                                 array(
 634                                         'newpage' => $rc->mAttribs['rc_type'] == RC_NEW,
 635                                         'minor' => $rc->mAttribs['rc_minor'],
 636                                         'unpatrolled' => $unpatrolled,
 637                                         'bot' => $rc->mAttribs['rc_bot']
 638                                 ),
 639                                 ''
 640                         );
 641                         $this->insertArticleLink( $s, $rc, $unpatrolled, $watched );
 642                 }
 643                 # Edit/log timestamp
 644                 $this->insertTimestamp( $s, $rc );
 645                 # Bytes added or removed
 646                 if ( $wgRCShowChangedSize ) {
 647                         $cd = $this->formatCharacterDifference( $rc );
 648                         if ( $cd !== '' ) {
 649                                 $s .= $cd . '  <span class="mw-changeslist-separator">. .</span> ';
 650                         }
 651                 }
 652
 653                 if ( $rc->mAttribs['rc_type'] == RC_LOG ) {
 654                         $s .= $this->insertLogEntry( $rc );
 655                 } else {
 656                         # User tool links
 657                         $this->insertUserRelatedLinks( $s, $rc );
 658                         # LTR/RTL direction mark
 659                         $s .= $this->getLanguage()->getDirMark();
 660                         $s .= $this->insertComment( $rc );
 661                 }
 662
 663                 # Tags
 664                 $this->insertTags( $s, $rc, $classes );
 665                 # Rollback
 666                 $this->insertRollback( $s, $rc );
 667                 # For subclasses
 668                 $this->insertExtra( $s, $rc, $classes );
 669
 670                 # How many users watch this page
 671                 if ( $rc->numberofWatchingusers > 0 ) {
 672                         $s .= ' ' . $this->numberofWatchingusers( $rc->numberofWatchingusers );
 673                 }
 674
 675                 if ( $this->watchlist ) {
 676                         $classes[] = Sanitizer::escapeClass( 'watchlist-' . $rc->mAttribs['rc_namespace'] . '-' . $rc->mAttribs['rc_title'] );
 677                 }
 678
 679                 if ( !wfRunHooks( 'OldChangesListRecentChangesLine', array( &$this, &$s, $rc, &$classes ) ) ) {
 680                         wfProfileOut( __METHOD__ );
 681                         return false;
 682                 }
 683
 684                 wfProfileOut( __METHOD__ );
 685                 return "$dateheader<li class=\"" . implode( ' ', $classes ) . "\">" . $s . "</li>\n";
 686         }
 687 }
 688
 689 /**
 690  * Generate a list of changes using an Enhanced system (uses javascript).
 691  */
 692 class EnhancedChangesList extends ChangesList {
 693
 694         protected $rc_cache;
 695
 696         /**
 697          * Add the JavaScript file for enhanced changeslist
 698          * @return String
 699          */
 700         public function beginRecentChangesList() {
 701                 $this->rc_cache = array();
 702                 $this->rcMoveIndex = 0;
 703                 $this->rcCacheIndex = 0;
 704                 $this->lastdate = '';
 705                 $this->rclistOpen = false;
 706                 $this->getOutput()->addModules( 'mediawiki.special.changeslist' );
 707                 return '';
 708         }
 709         /**
 710          * Format a line for enhanced recentchange (aka with javascript and block of lines).
 711          *
 712          * @param $baseRC RecentChange
 713          * @param $watched bool
 714          *
 715          * @return string
 716          */
 717         public function recentChangesLine( &$baseRC, $watched = false ) {
 718                 wfProfileIn( __METHOD__ );
 719
 720                 # Create a specialised object
 721                 $rc = RCCacheEntry::newFromParent( $baseRC );
 722
 723                 $curIdEq = array( 'curid' => $rc->mAttribs['rc_cur_id'] );
 724
 725                 # If it's a new day, add the headline and flush the cache
 726                 $date = $this->getLanguage()->userDate( $rc->mAttribs['rc_timestamp'], $this->getUser() );
 727                 $ret = '';
 728                 if ( $date != $this->lastdate ) {
 729                         # Process current cache
 730                         $ret = $this->recentChangesBlock();
 731                         $this->rc_cache = array();
 732                         $ret .= Xml::element( 'h4', null, $date ) . "\n";
 733                         $this->lastdate = $date;
 734                 }
 735
 736                 # Should patrol-related stuff be shown?
 737                 $rc->unpatrolled = $this->showAsUnpatrolled( $rc );
 738
 739                 $showdifflinks = true;
 740                 # Make article link
 741                 $type = $rc->mAttribs['rc_type'];
 742                 $logType = $rc->mAttribs['rc_log_type'];
 743                 // Page moves, very old style, not supported anymore
 744                 if ( $type == RC_MOVE || $type == RC_MOVE_OVER_REDIRECT ) {
 745                 // New unpatrolled pages
 746                 } elseif ( $rc->unpatrolled && $type == RC_NEW ) {
 747                         $clink = Linker::linkKnown( $rc->getTitle() );
 748                 // Log entries
 749                 } elseif ( $type == RC_LOG ) {
 750                         if ( $logType ) {
 751                                 $logtitle = SpecialPage::getTitleFor( 'Log', $logType );
 752                                 $logpage = new LogPage( $logType );
 753                                 $logname = $logpage->getName()->escaped();
 754                                 $clink = $this->msg( 'parentheses' )->rawParams( Linker::linkKnown( $logtitle, $logname ) )->escaped();
 755                         } else {
 756                                 $clink = Linker::link( $rc->getTitle() );
 757                         }
 758                         $watched = false;
 759                 // Log entries (old format) and special pages
 760                 } elseif ( $rc->mAttribs['rc_namespace'] == NS_SPECIAL ) {
 761                         wfDebug( "Unexpected special page in recentchanges\n" );
 762                         $clink = '';
 763                 // Edits
 764                 } else {
 765                         $clink = Linker::linkKnown( $rc->getTitle() );
 766                 }
 767
 768                 # Don't show unusable diff links
 769                 if ( !ChangesList::userCan( $rc, Revision::DELETED_TEXT, $this->getUser() ) ) {
 770                         $showdifflinks = false;
 771                 }
 772
 773                 $time = $this->getLanguage()->userTime( $rc->mAttribs['rc_timestamp'], $this->getUser() );
 774                 $rc->watched = $watched;
 775                 $rc->link = $clink;
 776                 $rc->timestamp = $time;
 777                 $rc->numberofWatchingusers = $baseRC->numberofWatchingusers;
 778
 779                 # Make "cur" and "diff" links.  Do not use link(), it is too slow if
 780                 # called too many times (50% of CPU time on RecentChanges!).
 781                 $thisOldid = $rc->mAttribs['rc_this_oldid'];
 782                 $lastOldid = $rc->mAttribs['rc_last_oldid'];
 783
 784                 $querycur = $curIdEq + array( 'diff' => '0', 'oldid' => $thisOldid );
 785                 $querydiff = $curIdEq + array( 'diff' => $thisOldid, 'oldid' => $lastOldid );
 786
 787                 if ( !$showdifflinks ) {
 788                         $curLink = $this->message['cur'];
 789                         $diffLink = $this->message['diff'];
 790                 } elseif ( in_array( $type, array( RC_NEW, RC_LOG, RC_MOVE, RC_MOVE_OVER_REDIRECT ) ) ) {
 791                         if ( $type != RC_NEW ) {
 792                                 $curLink = $this->message['cur'];
 793                         } else {
 794                                 $curUrl = htmlspecialchars( $rc->getTitle()->getLinkURL( $querycur ) );
 795                                 $curLink = "<a href=\"$curUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['cur']}</a>";
 796                         }
 797                         $diffLink = $this->message['diff'];
 798                 } else {
 799                         $diffUrl = htmlspecialchars( $rc->getTitle()->getLinkURL( $querydiff ) );
 800                         $curUrl = htmlspecialchars( $rc->getTitle()->getLinkURL( $querycur ) );
 801                         $diffLink = "<a href=\"$diffUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['diff']}</a>";
 802                         $curLink = "<a href=\"$curUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['cur']}</a>";
 803                 }
 804
 805                 # Make "last" link
 806                 if ( !$showdifflinks || !$lastOldid ) {
 807                         $lastLink = $this->message['last'];
 808                 } elseif ( in_array( $type, array( RC_LOG, RC_MOVE, RC_MOVE_OVER_REDIRECT ) ) ) {
 809                         $lastLink = $this->message['last'];
 810                 } else {
 811                         $lastLink = Linker::linkKnown( $rc->getTitle(), $this->message['last'],
 812                                 array(), $curIdEq + array( 'diff' => $thisOldid, 'oldid' => $lastOldid ) );
 813                 }
 814
 815                 # Make user links
 816                 if ( $this->isDeleted( $rc, Revision::DELETED_USER ) ) {
 817                         $rc->userlink = ' <span class="history-deleted">' . $this->msg( 'rev-deleted-user' )->escaped() . '</span>';
 818                 } else {
 819                         $rc->userlink = Linker::userLink( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 820                         $rc->usertalklink = Linker::userToolLinks( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 821                 }
 822
 823                 $rc->lastlink = $lastLink;
 824                 $rc->curlink = $curLink;
 825                 $rc->difflink = $diffLink;
 826
 827                 # Put accumulated information into the cache, for later display
 828                 # Page moves go on their own line
 829                 $title = $rc->getTitle();
 830                 $secureName = $title->getPrefixedDBkey();
 831                 if ( $type == RC_MOVE || $type == RC_MOVE_OVER_REDIRECT ) {
 832                         # Use an @ character to prevent collision with page names
 833                         $this->rc_cache['@@' . ( $this->rcMoveIndex++ )] = array( $rc );
 834                 } else {
 835                         # Logs are grouped by type
 836                         if ( $type == RC_LOG ) {
 837                                 $secureName = SpecialPage::getTitleFor( 'Log', $logType )->getPrefixedDBkey();
 838                         }
 839                         if ( !isset( $this->rc_cache[$secureName] ) ) {
 840                                 $this->rc_cache[$secureName] = array();
 841                         }
 842
 843                         array_push( $this->rc_cache[$secureName], $rc );
 844                 }
 845
 846                 wfProfileOut( __METHOD__ );
 847
 848                 return $ret;
 849         }
 850
 851         /**
 852          * Enhanced RC group
 853          * @return string
 854          */
 855         protected function recentChangesBlockGroup( $block ) {
 856                 global $wgRCShowChangedSize;
 857
 858                 wfProfileIn( __METHOD__ );
 859
 860                 # Add the namespace and title of the block as part of the class
 861                 $classes = array( 'mw-collapsible', 'mw-collapsed', 'mw-enhanced-rc' );
 862                 if ( $block[0]->mAttribs['rc_log_type'] ) {
 863                         # Log entry
 864                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-log-'
 865                                         . $block[0]->mAttribs['rc_log_type'] . '-' . $block[0]->mAttribs['rc_title'] );
 866                 } else {
 867                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-ns'
 868                                         . $block[0]->mAttribs['rc_namespace'] . '-' . $block[0]->mAttribs['rc_title'] );
 869                 }
 870                 $classes[] = $block[0]->watched && $block[0]->mAttribs['rc_timestamp'] >= $block[0]->watched
 871                         ? 'mw-changeslist-line-watched' : 'mw-changeslist-line-not-watched';
 872                 $r = Html::openElement( 'table', array( 'class' => $classes ) ) .
 873                         Html::openElement( 'tr' );
 874
 875                 # Collate list of users
 876                 $userlinks = array();
 877                 # Other properties
 878                 $unpatrolled = false;
 879                 $isnew = false;
 880                 $allBots = true;
 881                 $allMinors = true;
 882                 $curId = $currentRevision = 0;
 883                 # Some catalyst variables...
 884                 $namehidden = true;
 885                 $allLogs = true;
 886                 foreach ( $block as $rcObj ) {
 887                         $oldid = $rcObj->mAttribs['rc_last_oldid'];
 888                         if ( $rcObj->mAttribs['rc_type'] == RC_NEW ) {
 889                                 $isnew = true;
 890                         }
 891                         // If all log actions to this page were hidden, then don't
 892                         // give the name of the affected page for this block!
 893                         if ( !$this->isDeleted( $rcObj, LogPage::DELETED_ACTION ) ) {
 894                                 $namehidden = false;
 895                         }
 896                         $u = $rcObj->userlink;
 897                         if ( !isset( $userlinks[$u] ) ) {
 898                                 $userlinks[$u] = 0;
 899                         }
 900                         if ( $rcObj->unpatrolled ) {
 901                                 $unpatrolled = true;
 902                         }
 903                         if ( $rcObj->mAttribs['rc_type'] != RC_LOG ) {
 904                                 $allLogs = false;
 905                         }
 906                         # Get the latest entry with a page_id and oldid
 907                         # since logs may not have these.
 908                         if ( !$curId && $rcObj->mAttribs['rc_cur_id'] ) {
 909                                 $curId = $rcObj->mAttribs['rc_cur_id'];
 910                         }
 911                         if ( !$currentRevision && $rcObj->mAttribs['rc_this_oldid'] ) {
 912                                 $currentRevision = $rcObj->mAttribs['rc_this_oldid'];
 913                         }
 914
 915                         if ( !$rcObj->mAttribs['rc_bot'] ) {
 916                                 $allBots = false;
 917                         }
 918                         if ( !$rcObj->mAttribs['rc_minor'] ) {
 919                                 $allMinors = false;
 920                         }
 921
 922                         $userlinks[$u]++;
 923                 }
 924
 925                 # Sort the list and convert to text
 926                 krsort( $userlinks );
 927                 asort( $userlinks );
 928                 $users = array();
 929                 foreach ( $userlinks as $userlink => $count ) {
 930                         $text = $userlink;
 931                         $text .= $this->getLanguage()->getDirMark();
 932                         if ( $count > 1 ) {
 933                                 $text .= ' ' . $this->msg( 'parentheses' )->rawParams( $this->getLanguage()->formatNum( $count ) . '×' )->escaped();
 934                         }
 935                         array_push( $users, $text );
 936                 }
 937
 938                 $users = ' <span class="changedby">'
 939                         . $this->msg( 'brackets' )->rawParams(
 940                                 implode( $this->message['semicolon-separator'], $users )
 941                         )->escaped() . '</span>';
 942
 943                 $tl = '<span class="mw-collapsible-toggle mw-collapsible-arrow mw-enhancedchanges-arrow mw-enhancedchanges-arrow-space"></span>';
 944                 $r .= "<td>$tl</td>";
 945
 946                 # Main line
 947                 $r .= '<td class="mw-enhanced-rc">' . $this->recentChangesFlags( array(
 948                         'newpage' => $isnew, # show, when one have this flag
 949                         'minor' => $allMinors, # show only, when all have this flag
 950                         'unpatrolled' => $unpatrolled, # show, when one have this flag
 951                         'bot' => $allBots, # show only, when all have this flag
 952                 ) );
 953
 954                 # Timestamp
 955                 $r .= '&#160;' . $block[0]->timestamp . '&#160;</td><td>';
 956
 957                 # Article link
 958                 if ( $namehidden ) {
 959                         $r .= ' <span class="history-deleted">' . $this->msg( 'rev-deleted-event' )->escaped() . '</span>';
 960                 } elseif ( $allLogs ) {
 961                         $r .= $this->maybeWatchedLink( $block[0]->link, $block[0]->watched );
 962                 } else {
 963                         $this->insertArticleLink( $r, $block[0], $block[0]->unpatrolled, $block[0]->watched );
 964                 }
 965
 966                 $r .= $this->getLanguage()->getDirMark();
 967
 968                 $queryParams['curid'] = $curId;
 969                 # Changes message
 970                 $n = count( $block );
 971                 static $nchanges = array();
 972                 if ( !isset( $nchanges[$n] ) ) {
 973                         $nchanges[$n] = $this->msg( 'nchanges' )->numParams( $n )->escaped();
 974                 }
 975                 # Total change link
 976                 $r .= ' ';
 977                 $logtext = '';
 978                 if ( !$allLogs ) {
 979                         if ( !ChangesList::userCan( $rcObj, Revision::DELETED_TEXT, $this->getUser() ) ) {
 980                                 $logtext .= $nchanges[$n];
 981                         } elseif ( $isnew ) {
 982                                 $logtext .= $nchanges[$n];
 983                         } else {
 984                                 $params = $queryParams;
 985                                 $params['diff'] = $currentRevision;
 986                                 $params['oldid'] = $oldid;
 987
 988                                 $logtext .= Linker::link(
 989                                         $block[0]->getTitle(),
 990                                         $nchanges[$n],
 991                                         array(),
 992                                         $params,
 993                                         array( 'known', 'noclasses' )
 994                                 );
 995                         }
 996                 }
 997
 998                 # History
 999                 if ( $allLogs ) {
1000                         // don't show history link for logs
1001                 } elseif ( $namehidden || !$block[0]->getTitle()->exists() ) {
1002                         $logtext .= $this->message['pipe-separator'] . $this->message['hist'];
1003                 } else {
1004                         $params = $queryParams;
1005                         $params['action'] = 'history';
1006
1007                         $logtext .= $this->message['pipe-separator'] .
1008                                 Linker::linkKnown(
1009                                         $block[0]->getTitle(),
1010                                         $this->message['hist'],
1011                                         array(),
1012                                         $params
1013                                 );
1014                 }
1015
1016                 if ( $logtext !== '' ) {
1017                         $r .= $this->msg( 'parentheses' )->rawParams( $logtext )->escaped();
1018                 }
1019
1020                 $r .= ' <span class="mw-changeslist-separator">. .</span> ';
1021
1022                 # Character difference (does not apply if only log items)
1023                 if ( $wgRCShowChangedSize && !$allLogs ) {
1024                         $last = 0;
1025                         $first = count( $block ) - 1;
1026                         # Some events (like logs) have an "empty" size, so we need to skip those...
1027                         while ( $last < $first && $block[$last]->mAttribs['rc_new_len'] === null ) {
1028                                 $last++;
1029                         }
1030                         while ( $first > $last && $block[$first]->mAttribs['rc_old_len'] === null ) {
1031                                 $first--;
1032                         }
1033                         # Get net change
1034                         $chardiff = $this->formatCharacterDifference( $block[$first], $block[$last] );
1035
1036                         if ( $chardiff == '' ) {
1037                                 $r .= ' ';
1038                         } else {
1039                                 $r .= ' ' . $chardiff . ' <span class="mw-changeslist-separator">. .</span> ';
1040                         }
1041                 }
1042
1043                 $r .= $users;
1044                 $r .= $this->numberofWatchingusers( $block[0]->numberofWatchingusers );
1045
1046                 # Sub-entries
1047                 foreach ( $block as $rcObj ) {
1048                         # Classes to apply -- TODO implement
1049                         $classes = array();
1050                         $type = $rcObj->mAttribs['rc_type'];
1051
1052                         $trClass = $rcObj->watched && $rcObj->mAttribs['rc_timestamp'] >= $rcObj->watched
1053                                 ? ' class="mw-enhanced-watched"' : '';
1054
1055                         $r .= '<tr' . $trClass . '><td></td><td class="mw-enhanced-rc">';
1056                         $r .= $this->recentChangesFlags( array(
1057                                 'newpage' => $type == RC_NEW,
1058                                 'minor' => $rcObj->mAttribs['rc_minor'],
1059                                 'unpatrolled' => $rcObj->unpatrolled,
1060                                 'bot' => $rcObj->mAttribs['rc_bot'],
1061                         ) );
1062                         $r .= '&#160;</td><td class="mw-enhanced-rc-nested"><span class="mw-enhanced-rc-time">';
1063
1064                         $params = $queryParams;
1065
1066                         if ( $rcObj->mAttribs['rc_this_oldid'] != 0 ) {
1067                                 $params['oldid'] = $rcObj->mAttribs['rc_this_oldid'];
1068                         }
1069
1070                         # Log timestamp
1071                         if ( $type == RC_LOG ) {
1072                                 $link = $rcObj->timestamp;
1073                         # Revision link
1074                         } elseif ( !ChangesList::userCan( $rcObj, Revision::DELETED_TEXT, $this->getUser() ) ) {
1075                                 $link = '<span class="history-deleted">' . $rcObj->timestamp . '</span> ';
1076                         } else {
1077
1078                                 $link = Linker::linkKnown(
1079                                                 $rcObj->getTitle(),
1080                                                 $rcObj->timestamp,
1081                                                 array(),
1082                                                 $params
1083                                         );
1084                                 if ( $this->isDeleted( $rcObj, Revision::DELETED_TEXT ) ) {
1085                                         $link = '<span class="history-deleted">' . $link . '</span> ';
1086                                 }
1087                         }
1088                         $r .= $link . '</span>';
1089
1090                         if ( !$type == RC_LOG || $type == RC_NEW ) {
1091                                 $r .= ' ' . $this->msg( 'parentheses' )->rawParams( $rcObj->curlink . $this->message['pipe-separator'] . $rcObj->lastlink )->escaped();
1092                         }
1093                         $r .= ' <span class="mw-changeslist-separator">. .</span> ';
1094
1095                         # Character diff
1096                         if ( $wgRCShowChangedSize ) {
1097                                 $cd = $this->formatCharacterDifference( $rcObj );
1098                                 if ( $cd !== '' ) {
1099                                         $r .= $cd . ' <span class="mw-changeslist-separator">. .</span> ';
1100                                 }
1101                         }
1102
1103                         if ( $rcObj->mAttribs['rc_type'] == RC_LOG ) {
1104                                 $r .= $this->insertLogEntry( $rcObj );
1105                         } else {
1106                                 # User links
1107                                 $r .= $rcObj->userlink;
1108                                 $r .= $rcObj->usertalklink;
1109                                 $r .= $this->insertComment( $rcObj );
1110                         }
1111
1112                         # Rollback
1113                         $this->insertRollback( $r, $rcObj );
1114                         # Tags
1115                         $this->insertTags( $r, $rcObj, $classes );
1116
1117                         $r .= "</td></tr>\n";
1118                 }
1119                 $r .= "</table>\n";
1120
1121                 $this->rcCacheIndex++;
1122
1123                 wfProfileOut( __METHOD__ );
1124
1125                 return $r;
1126         }
1127
1128         /**
1129          * Generate HTML for an arrow or placeholder graphic
1130          * @param string $dir one of '', 'd', 'l', 'r'
1131          * @param string $alt text
1132          * @param string $title text
1133          * @return String: HTML "<img>" tag
1134          */
1135         protected function arrow( $dir, $alt = '', $title = '' ) {
1136                 global $wgStylePath;
1137                 $encUrl = htmlspecialchars( $wgStylePath . '/common/images/Arr_' . $dir . '.png' );
1138                 $encAlt = htmlspecialchars( $alt );
1139                 $encTitle = htmlspecialchars( $title );
1140                 return "<img src=\"$encUrl\" width=\"12\" height=\"12\" alt=\"$encAlt\" title=\"$encTitle\" />";
1141         }
1142
1143         /**
1144          * Generate HTML for a right- or left-facing arrow,
1145          * depending on language direction.
1146          * @return String: HTML "<img>" tag
1147          */
1148         protected function sideArrow() {
1149                 $dir = $this->getLanguage()->isRTL() ? 'l' : 'r';
1150                 return $this->arrow( $dir, '+', $this->msg( 'rc-enhanced-expand' )->text() );
1151         }
1152
1153         /**
1154          * Generate HTML for a down-facing arrow
1155          * depending on language direction.
1156          * @return String: HTML "<img>" tag
1157          */
1158         protected function downArrow() {
1159                 return $this->arrow( 'd', '-', $this->msg( 'rc-enhanced-hide' )->text() );
1160         }
1161
1162         /**
1163          * Generate HTML for a spacer image
1164          * @return String: HTML "<img>" tag
1165          */
1166         protected function spacerArrow() {
1167                 return $this->arrow( '', codepointToUtf8( 0xa0 ) ); // non-breaking space
1168         }
1169
1170         /**
1171          * Enhanced RC ungrouped line.
1172          *
1173          * @param $rcObj RecentChange
1174          * @return String: a HTML formatted line (generated using $r)
1175          */
1176         protected function recentChangesBlockLine( $rcObj ) {
1177                 global $wgRCShowChangedSize;
1178
1179                 wfProfileIn( __METHOD__ );
1180                 $query['curid'] = $rcObj->mAttribs['rc_cur_id'];
1181
1182                 $type = $rcObj->mAttribs['rc_type'];
1183                 $logType = $rcObj->mAttribs['rc_log_type'];
1184                 $classes = array( 'mw-enhanced-rc' );
1185                 if ( $logType ) {
1186                         # Log entry
1187                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-log-'
1188                                         . $logType . '-' . $rcObj->mAttribs['rc_title'] );
1189                 } else {
1190                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-ns' .
1191                                         $rcObj->mAttribs['rc_namespace'] . '-' . $rcObj->mAttribs['rc_title'] );
1192                 }
1193                 $classes[] = $rcObj->watched && $rcObj->mAttribs['rc_timestamp'] >= $rcObj->watched
1194                         ? 'mw-changeslist-line-watched' : 'mw-changeslist-line-not-watched';
1195                 $r = Html::openElement( 'table', array( 'class' => $classes ) ) .
1196                         Html::openElement( 'tr' );
1197
1198                 $r .= '<td class="mw-enhanced-rc"><span class="mw-enhancedchanges-arrow-space"></span>';
1199                 # Flag and Timestamp
1200                 if ( $type == RC_MOVE || $type == RC_MOVE_OVER_REDIRECT ) {
1201                         $r .= '&#160;&#160;&#160;&#160;'; // 4 flags -> 4 spaces
1202                 } else {
1203                         $r .= $this->recentChangesFlags( array(
1204                                 'newpage' => $type == RC_NEW,
1205                                 'minor' => $rcObj->mAttribs['rc_minor'],
1206                                 'unpatrolled' => $rcObj->unpatrolled,
1207                                 'bot' => $rcObj->mAttribs['rc_bot'],
1208                         ) );
1209                 }
1210                 $r .= '&#160;' . $rcObj->timestamp . '&#160;</td><td>';
1211                 # Article or log link
1212                 if ( $logType ) {
1213                         $logPage = new LogPage( $logType );
1214                         $logTitle = SpecialPage::getTitleFor( 'Log', $logType );
1215                         $logName = $logPage->getName()->escaped();
1216                         $r .= $this->msg( 'parentheses' )->rawParams( Linker::linkKnown( $logTitle, $logName ) )->escaped();
1217                 } else {
1218                         $this->insertArticleLink( $r, $rcObj, $rcObj->unpatrolled, $rcObj->watched );
1219                 }
1220                 # Diff and hist links
1221                 if ( $type != RC_LOG ) {
1222                         $query['action'] = 'history';
1223                         $r .= ' ' . $this->msg( 'parentheses' )->rawParams( $rcObj->difflink . $this->message['pipe-separator'] . Linker::linkKnown(
1224                                 $rcObj->getTitle(),
1225                                 $this->message['hist'],
1226                                 array(),
1227                                 $query
1228                         ) )->escaped();
1229                 }
1230                 $r .= ' <span class="mw-changeslist-separator">. .</span> ';
1231                 # Character diff
1232                 if ( $wgRCShowChangedSize ) {
1233                         $cd = $this->formatCharacterDifference( $rcObj );
1234                         if ( $cd !== '' ) {
1235                                 $r .= $cd . ' <span class="mw-changeslist-separator">. .</span> ';
1236                         }
1237                 }
1238
1239                 if ( $type == RC_LOG ) {
1240                         $r .= $this->insertLogEntry( $rcObj );
1241                 } else {
1242                         $r .= ' ' . $rcObj->userlink . $rcObj->usertalklink;
1243                         $r .= $this->insertComment( $rcObj );
1244                         $this->insertRollback( $r, $rcObj );
1245                 }
1246
1247                 # Tags
1248                 $this->insertTags( $r, $rcObj, $classes );
1249                 # Show how many people are watching this if enabled
1250                 $r .= $this->numberofWatchingusers( $rcObj->numberofWatchingusers );
1251
1252                 $r .= "</td></tr></table>\n";
1253
1254                 wfProfileOut( __METHOD__ );
1255
1256                 return $r;
1257         }
1258
1259         /**
1260          * If enhanced RC is in use, this function takes the previously cached
1261          * RC lines, arranges them, and outputs the HTML
1262          *
1263          * @return string
1264          */
1265         protected function recentChangesBlock() {
1266                 if ( count ( $this->rc_cache ) == 0 ) {
1267                         return '';
1268                 }
1269
1270                 wfProfileIn( __METHOD__ );
1271
1272                 $blockOut = '';
1273                 foreach ( $this->rc_cache as $block ) {
1274                         if ( count( $block ) < 2 ) {
1275                                 $blockOut .= $this->recentChangesBlockLine( array_shift( $block ) );
1276                         } else {
1277                                 $blockOut .= $this->recentChangesBlockGroup( $block );
1278                         }
1279                 }
1280
1281                 wfProfileOut( __METHOD__ );
1282
1283                 return '<div>' . $blockOut . '</div>';
1284         }
1285
1286         /**
1287          * Returns text for the end of RC
1288          * If enhanced RC is in use, returns pretty much all the text
1289          * @return string
1290          */
1291         public function endRecentChangesList() {
1292                 return $this->recentChangesBlock() . parent::endRecentChangesList();
1293         }
1294
1295 }