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()->addModuleStyles( '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                 global $wgUseRCPatrol;
 366
 367                 $params = array();
 368
 369                 // In case we got a page creation which is yet unpatrolled and
 370                 // recent changes patrolling is enabled, the user probably rather
 371                 // wants to patrol the whole page (first revision) instead of seeing
 372                 // a patrollink for the current revision.
 373                 if ( $wgUseRCPatrol && $unpatrolled && $rc->getAttribute( 'rc_type' ) == RC_NEW ) {
 374                         $params['patrolpage'] = 1;
 375                 }
 376
 377                 $articlelink = Linker::linkKnown(
 378                         $rc->getTitle(),
 379                         null,
 380                         array( 'class' => 'mw-changeslist-title' ),
 381                         $params
 382                 );
 383                 if ( $this->isDeleted( $rc, Revision::DELETED_TEXT ) ) {
 384                         $articlelink = '<span class="history-deleted">' . $articlelink . '</span>';
 385                 }
 386                 # To allow for boldening pages watched by this user
 387                 $articlelink = "<span class=\"mw-title\">{$articlelink}</span>";
 388                 # RTL/LTR marker
 389                 $articlelink .= $this->getLanguage()->getDirMark();
 390
 391                 wfRunHooks( 'ChangesListInsertArticleLink',
 392                         array( &$this, &$articlelink, &$s, &$rc, $unpatrolled, $watched ) );
 393
 394                 $s .= " $articlelink";
 395         }
 396
 397         /**
 398          * Get the timestamp from $rc formatted with current user's settings
 399          * and a separator
 400          *
 401          * @param $rc RecentChange
 402          * @return string HTML fragment
 403          */
 404         public function getTimestamp( $rc ) {
 405                 return $this->message['semicolon-separator'] . '<span class="mw-changeslist-date">' .
 406                         $this->getLanguage()->userTime( $rc->mAttribs['rc_timestamp'], $this->getUser() ) . '</span> <span class="mw-changeslist-separator">. .</span> ';
 407         }
 408
 409         /**
 410          * Insert time timestamp string from $rc into $s
 411          *
 412          * @param string $s HTML to update
 413          * @param $rc RecentChange
 414          */
 415         public function insertTimestamp( &$s, $rc ) {
 416                 $s .= $this->getTimestamp( $rc );
 417         }
 418
 419         /**
 420          * Insert links to user page, user talk page and eventually a blocking link
 421          *
 422          * @param &$s String HTML to update
 423          * @param &$rc RecentChange
 424          */
 425         public function insertUserRelatedLinks( &$s, &$rc ) {
 426                 if ( $this->isDeleted( $rc, Revision::DELETED_USER ) ) {
 427                         $s .= ' <span class="history-deleted">' . $this->msg( 'rev-deleted-user' )->escaped() . '</span>';
 428                 } else {
 429                         $s .= $this->getLanguage()->getDirMark() . Linker::userLink( $rc->mAttribs['rc_user'],
 430                                 $rc->mAttribs['rc_user_text'] );
 431                         $s .= Linker::userToolLinks( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 432                 }
 433         }
 434
 435         /**
 436          * Insert a formatted action
 437          *
 438          * @param $rc RecentChange
 439          * @return string
 440          */
 441         public function insertLogEntry( $rc ) {
 442                 $formatter = LogFormatter::newFromRow( $rc->mAttribs );
 443                 $formatter->setContext( $this->getContext() );
 444                 $formatter->setShowUserToolLinks( true );
 445                 $mark = $this->getLanguage()->getDirMark();
 446                 return $formatter->getActionText() . " $mark" . $formatter->getComment();
 447         }
 448
 449         /**
 450          * Insert a formatted comment
 451          * @param $rc RecentChange
 452          * @return string
 453          */
 454         public function insertComment( $rc ) {
 455                 if ( $rc->mAttribs['rc_type'] != RC_MOVE && $rc->mAttribs['rc_type'] != RC_MOVE_OVER_REDIRECT ) {
 456                         if ( $this->isDeleted( $rc, Revision::DELETED_COMMENT ) ) {
 457                                 return ' <span class="history-deleted">' . $this->msg( 'rev-deleted-comment' )->escaped() . '</span>';
 458                         } else {
 459                                 return Linker::commentBlock( $rc->mAttribs['rc_comment'], $rc->getTitle() );
 460                         }
 461                 }
 462                 return '';
 463         }
 464
 465         /**
 466          * Check whether to enable recent changes patrol features
 467          * @return Boolean
 468          */
 469         public static function usePatrol() {
 470                 global $wgUser;
 471                 return $wgUser->useRCPatrol();
 472         }
 473
 474         /**
 475          * Returns the string which indicates the number of watching users
 476          * @return string
 477          */
 478         protected function numberofWatchingusers( $count ) {
 479                 static $cache = array();
 480                 if ( $count > 0 ) {
 481                         if ( !isset( $cache[$count] ) ) {
 482                                 $cache[$count] = $this->msg( 'number_of_watching_users_RCview' )->numParams( $count )->escaped();
 483                         }
 484                         return $cache[$count];
 485                 } else {
 486                         return '';
 487                 }
 488         }
 489
 490         /**
 491          * Determine if said field of a revision is hidden
 492          * @param $rc RCCacheEntry
 493          * @param $field Integer: one of DELETED_* bitfield constants
 494          * @return Boolean
 495          */
 496         public static function isDeleted( $rc, $field ) {
 497                 return ( $rc->mAttribs['rc_deleted'] & $field ) == $field;
 498         }
 499
 500         /**
 501          * Determine if the current user is allowed to view a particular
 502          * field of this revision, if it's marked as deleted.
 503          * @param $rc RCCacheEntry
 504          * @param $field Integer
 505          * @param $user User object to check, or null to use $wgUser
 506          * @return Boolean
 507          */
 508         public static function userCan( $rc, $field, User $user = null ) {
 509                 if ( $rc->mAttribs['rc_type'] == RC_LOG ) {
 510                         return LogEventsList::userCanBitfield( $rc->mAttribs['rc_deleted'], $field, $user );
 511                 } else {
 512                         return Revision::userCanBitfield( $rc->mAttribs['rc_deleted'], $field, $user );
 513                 }
 514         }
 515
 516         /**
 517          * @param $link string
 518          * @param $watched bool
 519          * @return string
 520          */
 521         protected function maybeWatchedLink( $link, $watched = false ) {
 522                 if ( $watched ) {
 523                         return '<strong class="mw-watched">' . $link . '</strong>';
 524                 } else {
 525                         return '<span class="mw-rc-unwatched">' . $link . '</span>';
 526                 }
 527         }
 528
 529         /** Inserts a rollback link
 530          *
 531          * @param $s string
 532          * @param $rc RecentChange
 533          */
 534         public function insertRollback( &$s, &$rc ) {
 535                 if ( $rc->mAttribs['rc_type'] != RC_NEW && $rc->mAttribs['rc_this_oldid'] && $rc->mAttribs['rc_cur_id'] ) {
 536                         $page = $rc->getTitle();
 537                         /** Check for rollback and edit permissions, disallow special pages, and only
 538                           * show a link on the top-most revision */
 539                         if ( $this->getUser()->isAllowed( 'rollback' ) && $rc->mAttribs['page_latest'] == $rc->mAttribs['rc_this_oldid'] )
 540                         {
 541                                 $rev = new Revision( array(
 542                                         'title' => $page,
 543                                         'id' => $rc->mAttribs['rc_this_oldid'],
 544                                         'user' => $rc->mAttribs['rc_user'],
 545                                         'user_text' => $rc->mAttribs['rc_user_text'],
 546                                         'deleted' => $rc->mAttribs['rc_deleted']
 547                                 ) );
 548                                 $s .= ' ' . Linker::generateRollback( $rev, $this->getContext() );
 549                         }
 550                 }
 551         }
 552
 553         /**
 554          * @param $s string
 555          * @param $rc RecentChange
 556          * @param $classes
 557          */
 558         public function insertTags( &$s, &$rc, &$classes ) {
 559                 if ( empty( $rc->mAttribs['ts_tags'] ) ) {
 560                         return;
 561                 }
 562
 563                 list( $tagSummary, $newClasses ) = ChangeTags::formatSummaryRow( $rc->mAttribs['ts_tags'], 'changeslist' );
 564                 $classes = array_merge( $classes, $newClasses );
 565                 $s .= ' ' . $tagSummary;
 566         }
 567
 568         public function insertExtra( &$s, &$rc, &$classes ) {
 569                 // Empty, used for subclasses to add anything special.
 570         }
 571
 572         protected function showAsUnpatrolled( RecentChange $rc ) {
 573                 $unpatrolled = false;
 574                 if ( !$rc->mAttribs['rc_patrolled'] ) {
 575                         if ( $this->getUser()->useRCPatrol() ) {
 576                                 $unpatrolled = true;
 577                         } elseif ( $this->getUser()->useNPPatrol() && $rc->mAttribs['rc_type'] == RC_NEW ) {
 578                                 $unpatrolled = true;
 579                         }
 580                 }
 581                 return $unpatrolled;
 582         }
 583 }
 584
 585 /**
 586  * Generate a list of changes using the good old system (no javascript)
 587  */
 588 class OldChangesList extends ChangesList {
 589         /**
 590          * Format a line using the old system (aka without any javascript).
 591          *
 592          * @param $rc RecentChange, passed by reference
 593          * @param bool $watched (default false)
 594          * @param int $linenumber (default null)
 595          *
 596          * @return string|bool
 597          */
 598         public function recentChangesLine( &$rc, $watched = false, $linenumber = null ) {
 599                 global $wgRCShowChangedSize;
 600                 wfProfileIn( __METHOD__ );
 601
 602                 # Should patrol-related stuff be shown?
 603                 $unpatrolled = $this->showAsUnpatrolled( $rc );
 604
 605                 $dateheader = ''; // $s now contains only <li>...</li>, for hooks' convenience.
 606                 $this->insertDateHeader( $dateheader, $rc->mAttribs['rc_timestamp'] );
 607
 608                 $s = '';
 609                 $classes = array();
 610                 // use mw-line-even/mw-line-odd class only if linenumber is given (feature from bug 14468)
 611                 if ( $linenumber ) {
 612                         if ( $linenumber & 1 ) {
 613                                 $classes[] = 'mw-line-odd';
 614                         } else {
 615                                 $classes[] = 'mw-line-even';
 616                         }
 617                 }
 618
 619                 // Indicate watched status on the line to allow for more
 620                 // comprehensive styling.
 621                 $classes[] = $watched && $rc->mAttribs['rc_timestamp'] >= $watched
 622                         ? 'mw-changeslist-line-watched' : 'mw-changeslist-line-not-watched';
 623
 624                 // Moved pages (very very old, not supported anymore)
 625                 if ( $rc->mAttribs['rc_type'] == RC_MOVE || $rc->mAttribs['rc_type'] == RC_MOVE_OVER_REDIRECT ) {
 626                 // Log entries
 627                 } elseif ( $rc->mAttribs['rc_log_type'] ) {
 628                         $logtitle = SpecialPage::getTitleFor( 'Log', $rc->mAttribs['rc_log_type'] );
 629                         $this->insertLog( $s, $logtitle, $rc->mAttribs['rc_log_type'] );
 630                 // Log entries (old format) or log targets, and special pages
 631                 } elseif ( $rc->mAttribs['rc_namespace'] == NS_SPECIAL ) {
 632                         list( $name, $subpage ) = SpecialPageFactory::resolveAlias( $rc->mAttribs['rc_title'] );
 633                         if ( $name == 'Log' ) {
 634                                 $this->insertLog( $s, $rc->getTitle(), $subpage );
 635                         }
 636                 // Regular entries
 637                 } else {
 638                         $this->insertDiffHist( $s, $rc, $unpatrolled );
 639                         # M, N, b and ! (minor, new, bot and unpatrolled)
 640                         $s .= $this->recentChangesFlags(
 641                                 array(
 642                                         'newpage' => $rc->mAttribs['rc_type'] == RC_NEW,
 643                                         'minor' => $rc->mAttribs['rc_minor'],
 644                                         'unpatrolled' => $unpatrolled,
 645                                         'bot' => $rc->mAttribs['rc_bot']
 646                                 ),
 647                                 ''
 648                         );
 649                         $this->insertArticleLink( $s, $rc, $unpatrolled, $watched );
 650                 }
 651                 # Edit/log timestamp
 652                 $this->insertTimestamp( $s, $rc );
 653                 # Bytes added or removed
 654                 if ( $wgRCShowChangedSize ) {
 655                         $cd = $this->formatCharacterDifference( $rc );
 656                         if ( $cd !== '' ) {
 657                                 $s .= $cd . '  <span class="mw-changeslist-separator">. .</span> ';
 658                         }
 659                 }
 660
 661                 if ( $rc->mAttribs['rc_type'] == RC_LOG ) {
 662                         $s .= $this->insertLogEntry( $rc );
 663                 } else {
 664                         # User tool links
 665                         $this->insertUserRelatedLinks( $s, $rc );
 666                         # LTR/RTL direction mark
 667                         $s .= $this->getLanguage()->getDirMark();
 668                         $s .= $this->insertComment( $rc );
 669                 }
 670
 671                 # Tags
 672                 $this->insertTags( $s, $rc, $classes );
 673                 # Rollback
 674                 $this->insertRollback( $s, $rc );
 675                 # For subclasses
 676                 $this->insertExtra( $s, $rc, $classes );
 677
 678                 # How many users watch this page
 679                 if ( $rc->numberofWatchingusers > 0 ) {
 680                         $s .= ' ' . $this->numberofWatchingusers( $rc->numberofWatchingusers );
 681                 }
 682
 683                 if ( $this->watchlist ) {
 684                         $classes[] = Sanitizer::escapeClass( 'watchlist-' . $rc->mAttribs['rc_namespace'] . '-' . $rc->mAttribs['rc_title'] );
 685                 }
 686
 687                 if ( !wfRunHooks( 'OldChangesListRecentChangesLine', array( &$this, &$s, $rc, &$classes ) ) ) {
 688                         wfProfileOut( __METHOD__ );
 689                         return false;
 690                 }
 691
 692                 wfProfileOut( __METHOD__ );
 693                 return "$dateheader<li class=\"" . implode( ' ', $classes ) . "\">" . $s . "</li>\n";
 694         }
 695 }
 696
 697 /**
 698  * Generate a list of changes using an Enhanced system (uses javascript).
 699  */
 700 class EnhancedChangesList extends ChangesList {
 701
 702         protected $rc_cache;
 703
 704         /**
 705          * Add the JavaScript file for enhanced changeslist
 706          * @return String
 707          */
 708         public function beginRecentChangesList() {
 709                 $this->rc_cache = array();
 710                 $this->rcMoveIndex = 0;
 711                 $this->rcCacheIndex = 0;
 712                 $this->lastdate = '';
 713                 $this->rclistOpen = false;
 714                 $this->getOutput()->addModuleStyles( 'mediawiki.special.changeslist' );
 715                 return '';
 716         }
 717         /**
 718          * Format a line for enhanced recentchange (aka with javascript and block of lines).
 719          *
 720          * @param $baseRC RecentChange
 721          * @param $watched bool
 722          *
 723          * @return string
 724          */
 725         public function recentChangesLine( &$baseRC, $watched = false ) {
 726                 wfProfileIn( __METHOD__ );
 727
 728                 # Create a specialised object
 729                 $rc = RCCacheEntry::newFromParent( $baseRC );
 730
 731                 $curIdEq = array( 'curid' => $rc->mAttribs['rc_cur_id'] );
 732
 733                 # If it's a new day, add the headline and flush the cache
 734                 $date = $this->getLanguage()->userDate( $rc->mAttribs['rc_timestamp'], $this->getUser() );
 735                 $ret = '';
 736                 if ( $date != $this->lastdate ) {
 737                         # Process current cache
 738                         $ret = $this->recentChangesBlock();
 739                         $this->rc_cache = array();
 740                         $ret .= Xml::element( 'h4', null, $date ) . "\n";
 741                         $this->lastdate = $date;
 742                 }
 743
 744                 # Should patrol-related stuff be shown?
 745                 $rc->unpatrolled = $this->showAsUnpatrolled( $rc );
 746
 747                 $showdifflinks = true;
 748                 # Make article link
 749                 $type = $rc->mAttribs['rc_type'];
 750                 $logType = $rc->mAttribs['rc_log_type'];
 751                 // Page moves, very old style, not supported anymore
 752                 if ( $type == RC_MOVE || $type == RC_MOVE_OVER_REDIRECT ) {
 753                 // New unpatrolled pages
 754                 } elseif ( $rc->unpatrolled && $type == RC_NEW ) {
 755                         $clink = Linker::linkKnown( $rc->getTitle() );
 756                 // Log entries
 757                 } elseif ( $type == RC_LOG ) {
 758                         if ( $logType ) {
 759                                 $logtitle = SpecialPage::getTitleFor( 'Log', $logType );
 760                                 $logpage = new LogPage( $logType );
 761                                 $logname = $logpage->getName()->escaped();
 762                                 $clink = $this->msg( 'parentheses' )->rawParams( Linker::linkKnown( $logtitle, $logname ) )->escaped();
 763                         } else {
 764                                 $clink = Linker::link( $rc->getTitle() );
 765                         }
 766                         $watched = false;
 767                 // Log entries (old format) and special pages
 768                 } elseif ( $rc->mAttribs['rc_namespace'] == NS_SPECIAL ) {
 769                         wfDebug( "Unexpected special page in recentchanges\n" );
 770                         $clink = '';
 771                 // Edits
 772                 } else {
 773                         $clink = Linker::linkKnown( $rc->getTitle() );
 774                 }
 775
 776                 # Don't show unusable diff links
 777                 if ( !ChangesList::userCan( $rc, Revision::DELETED_TEXT, $this->getUser() ) ) {
 778                         $showdifflinks = false;
 779                 }
 780
 781                 $time = $this->getLanguage()->userTime( $rc->mAttribs['rc_timestamp'], $this->getUser() );
 782                 $rc->watched = $watched;
 783                 $rc->link = $clink;
 784                 $rc->timestamp = $time;
 785                 $rc->numberofWatchingusers = $baseRC->numberofWatchingusers;
 786
 787                 # Make "cur" and "diff" links.  Do not use link(), it is too slow if
 788                 # called too many times (50% of CPU time on RecentChanges!).
 789                 $thisOldid = $rc->mAttribs['rc_this_oldid'];
 790                 $lastOldid = $rc->mAttribs['rc_last_oldid'];
 791
 792                 $querycur = $curIdEq + array( 'diff' => '0', 'oldid' => $thisOldid );
 793                 $querydiff = $curIdEq + array( 'diff' => $thisOldid, 'oldid' => $lastOldid );
 794
 795                 if ( !$showdifflinks ) {
 796                         $curLink = $this->message['cur'];
 797                         $diffLink = $this->message['diff'];
 798                 } elseif ( in_array( $type, array( RC_NEW, RC_LOG, RC_MOVE, RC_MOVE_OVER_REDIRECT ) ) ) {
 799                         if ( $type != RC_NEW ) {
 800                                 $curLink = $this->message['cur'];
 801                         } else {
 802                                 $curUrl = htmlspecialchars( $rc->getTitle()->getLinkURL( $querycur ) );
 803                                 $curLink = "<a href=\"$curUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['cur']}</a>";
 804                         }
 805                         $diffLink = $this->message['diff'];
 806                 } else {
 807                         $diffUrl = htmlspecialchars( $rc->getTitle()->getLinkURL( $querydiff ) );
 808                         $curUrl = htmlspecialchars( $rc->getTitle()->getLinkURL( $querycur ) );
 809                         $diffLink = "<a href=\"$diffUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['diff']}</a>";
 810                         $curLink = "<a href=\"$curUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['cur']}</a>";
 811                 }
 812
 813                 # Make "last" link
 814                 if ( !$showdifflinks || !$lastOldid ) {
 815                         $lastLink = $this->message['last'];
 816                 } elseif ( in_array( $type, array( RC_LOG, RC_MOVE, RC_MOVE_OVER_REDIRECT ) ) ) {
 817                         $lastLink = $this->message['last'];
 818                 } else {
 819                         $lastLink = Linker::linkKnown( $rc->getTitle(), $this->message['last'],
 820                                 array(), $curIdEq + array( 'diff' => $thisOldid, 'oldid' => $lastOldid ) );
 821                 }
 822
 823                 # Make user links
 824                 if ( $this->isDeleted( $rc, Revision::DELETED_USER ) ) {
 825                         $rc->userlink = ' <span class="history-deleted">' . $this->msg( 'rev-deleted-user' )->escaped() . '</span>';
 826                 } else {
 827                         $rc->userlink = Linker::userLink( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 828                         $rc->usertalklink = Linker::userToolLinks( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 829                 }
 830
 831                 $rc->lastlink = $lastLink;
 832                 $rc->curlink = $curLink;
 833                 $rc->difflink = $diffLink;
 834
 835                 # Put accumulated information into the cache, for later display
 836                 # Page moves go on their own line
 837                 $title = $rc->getTitle();
 838                 $secureName = $title->getPrefixedDBkey();
 839                 if ( $type == RC_MOVE || $type == RC_MOVE_OVER_REDIRECT ) {
 840                         # Use an @ character to prevent collision with page names
 841                         $this->rc_cache['@@' . ( $this->rcMoveIndex++ )] = array( $rc );
 842                 } else {
 843                         # Logs are grouped by type
 844                         if ( $type == RC_LOG ) {
 845                                 $secureName = SpecialPage::getTitleFor( 'Log', $logType )->getPrefixedDBkey();
 846                         }
 847                         if ( !isset( $this->rc_cache[$secureName] ) ) {
 848                                 $this->rc_cache[$secureName] = array();
 849                         }
 850
 851                         array_push( $this->rc_cache[$secureName], $rc );
 852                 }
 853
 854                 wfProfileOut( __METHOD__ );
 855
 856                 return $ret;
 857         }
 858
 859         /**
 860          * Enhanced RC group
 861          * @return string
 862          */
 863         protected function recentChangesBlockGroup( $block ) {
 864                 global $wgRCShowChangedSize;
 865
 866                 wfProfileIn( __METHOD__ );
 867
 868                 # Add the namespace and title of the block as part of the class
 869                 $classes = array( 'mw-collapsible', 'mw-collapsed', 'mw-enhanced-rc' );
 870                 if ( $block[0]->mAttribs['rc_log_type'] ) {
 871                         # Log entry
 872                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-log-'
 873                                         . $block[0]->mAttribs['rc_log_type'] . '-' . $block[0]->mAttribs['rc_title'] );
 874                 } else {
 875                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-ns'
 876                                         . $block[0]->mAttribs['rc_namespace'] . '-' . $block[0]->mAttribs['rc_title'] );
 877                 }
 878                 $classes[] = $block[0]->watched && $block[0]->mAttribs['rc_timestamp'] >= $block[0]->watched
 879                         ? 'mw-changeslist-line-watched' : 'mw-changeslist-line-not-watched';
 880                 $r = Html::openElement( 'table', array( 'class' => $classes ) ) .
 881                         Html::openElement( 'tr' );
 882
 883                 # Collate list of users
 884                 $userlinks = array();
 885                 # Other properties
 886                 $unpatrolled = false;
 887                 $isnew = false;
 888                 $allBots = true;
 889                 $allMinors = true;
 890                 $curId = $currentRevision = 0;
 891                 # Some catalyst variables...
 892                 $namehidden = true;
 893                 $allLogs = true;
 894                 foreach ( $block as $rcObj ) {
 895                         $oldid = $rcObj->mAttribs['rc_last_oldid'];
 896                         if ( $rcObj->mAttribs['rc_type'] == RC_NEW ) {
 897                                 $isnew = true;
 898                         }
 899                         // If all log actions to this page were hidden, then don't
 900                         // give the name of the affected page for this block!
 901                         if ( !$this->isDeleted( $rcObj, LogPage::DELETED_ACTION ) ) {
 902                                 $namehidden = false;
 903                         }
 904                         $u = $rcObj->userlink;
 905                         if ( !isset( $userlinks[$u] ) ) {
 906                                 $userlinks[$u] = 0;
 907                         }
 908                         if ( $rcObj->unpatrolled ) {
 909                                 $unpatrolled = true;
 910                         }
 911                         if ( $rcObj->mAttribs['rc_type'] != RC_LOG ) {
 912                                 $allLogs = false;
 913                         }
 914                         # Get the latest entry with a page_id and oldid
 915                         # since logs may not have these.
 916                         if ( !$curId && $rcObj->mAttribs['rc_cur_id'] ) {
 917                                 $curId = $rcObj->mAttribs['rc_cur_id'];
 918                         }
 919                         if ( !$currentRevision && $rcObj->mAttribs['rc_this_oldid'] ) {
 920                                 $currentRevision = $rcObj->mAttribs['rc_this_oldid'];
 921                         }
 922
 923                         if ( !$rcObj->mAttribs['rc_bot'] ) {
 924                                 $allBots = false;
 925                         }
 926                         if ( !$rcObj->mAttribs['rc_minor'] ) {
 927                                 $allMinors = false;
 928                         }
 929
 930                         $userlinks[$u]++;
 931                 }
 932
 933                 # Sort the list and convert to text
 934                 krsort( $userlinks );
 935                 asort( $userlinks );
 936                 $users = array();
 937                 foreach ( $userlinks as $userlink => $count ) {
 938                         $text = $userlink;
 939                         $text .= $this->getLanguage()->getDirMark();
 940                         if ( $count > 1 ) {
 941                                 $text .= ' ' . $this->msg( 'parentheses' )->rawParams( $this->getLanguage()->formatNum( $count ) . '×' )->escaped();
 942                         }
 943                         array_push( $users, $text );
 944                 }
 945
 946                 $users = ' <span class="changedby">'
 947                         . $this->msg( 'brackets' )->rawParams(
 948                                 implode( $this->message['semicolon-separator'], $users )
 949                         )->escaped() . '</span>';
 950
 951                 $tl = '<span class="mw-collapsible-toggle mw-enhancedchanges-arrow mw-enhancedchanges-arrow-space"></span>';
 952                 $r .= "<td>$tl</td>";
 953
 954                 # Main line
 955                 $r .= '<td class="mw-enhanced-rc">' . $this->recentChangesFlags( array(
 956                         'newpage' => $isnew, # show, when one have this flag
 957                         'minor' => $allMinors, # show only, when all have this flag
 958                         'unpatrolled' => $unpatrolled, # show, when one have this flag
 959                         'bot' => $allBots, # show only, when all have this flag
 960                 ) );
 961
 962                 # Timestamp
 963                 $r .= '&#160;' . $block[0]->timestamp . '&#160;</td><td>';
 964
 965                 # Article link
 966                 if ( $namehidden ) {
 967                         $r .= ' <span class="history-deleted">' . $this->msg( 'rev-deleted-event' )->escaped() . '</span>';
 968                 } elseif ( $allLogs ) {
 969                         $r .= $this->maybeWatchedLink( $block[0]->link, $block[0]->watched );
 970                 } else {
 971                         $this->insertArticleLink( $r, $block[0], $block[0]->unpatrolled, $block[0]->watched );
 972                 }
 973
 974                 $r .= $this->getLanguage()->getDirMark();
 975
 976                 $queryParams['curid'] = $curId;
 977                 # Changes message
 978                 $n = count( $block );
 979                 static $nchanges = array();
 980                 if ( !isset( $nchanges[$n] ) ) {
 981                         $nchanges[$n] = $this->msg( 'nchanges' )->numParams( $n )->escaped();
 982                 }
 983                 # Total change link
 984                 $r .= ' ';
 985                 $logtext = '';
 986                 if ( !$allLogs ) {
 987                         if ( !ChangesList::userCan( $rcObj, Revision::DELETED_TEXT, $this->getUser() ) ) {
 988                                 $logtext .= $nchanges[$n];
 989                         } elseif ( $isnew ) {
 990                                 $logtext .= $nchanges[$n];
 991                         } else {
 992                                 $params = $queryParams;
 993                                 $params['diff'] = $currentRevision;
 994                                 $params['oldid'] = $oldid;
 995
 996                                 $logtext .= Linker::link(
 997                                         $block[0]->getTitle(),
 998                                         $nchanges[$n],
 999                                         array(),
1000                                         $params,
1001                                         array( 'known', 'noclasses' )
1002                                 );
1003                         }
1004                 }
1005
1006                 # History
1007                 if ( $allLogs ) {
1008                         // don't show history link for logs
1009                 } elseif ( $namehidden || !$block[0]->getTitle()->exists() ) {
1010                         $logtext .= $this->message['pipe-separator'] . $this->message['hist'];
1011                 } else {
1012                         $params = $queryParams;
1013                         $params['action'] = 'history';
1014
1015                         $logtext .= $this->message['pipe-separator'] .
1016                                 Linker::linkKnown(
1017                                         $block[0]->getTitle(),
1018                                         $this->message['hist'],
1019                                         array(),
1020                                         $params
1021                                 );
1022                 }
1023
1024                 if ( $logtext !== '' ) {
1025                         $r .= $this->msg( 'parentheses' )->rawParams( $logtext )->escaped();
1026                 }
1027
1028                 $r .= ' <span class="mw-changeslist-separator">. .</span> ';
1029
1030                 # Character difference (does not apply if only log items)
1031                 if ( $wgRCShowChangedSize && !$allLogs ) {
1032                         $last = 0;
1033                         $first = count( $block ) - 1;
1034                         # Some events (like logs) have an "empty" size, so we need to skip those...
1035                         while ( $last < $first && $block[$last]->mAttribs['rc_new_len'] === null ) {
1036                                 $last++;
1037                         }
1038                         while ( $first > $last && $block[$first]->mAttribs['rc_old_len'] === null ) {
1039                                 $first--;
1040                         }
1041                         # Get net change
1042                         $chardiff = $this->formatCharacterDifference( $block[$first], $block[$last] );
1043
1044                         if ( $chardiff == '' ) {
1045                                 $r .= ' ';
1046                         } else {
1047                                 $r .= ' ' . $chardiff . ' <span class="mw-changeslist-separator">. .</span> ';
1048                         }
1049                 }
1050
1051                 $r .= $users;
1052                 $r .= $this->numberofWatchingusers( $block[0]->numberofWatchingusers );
1053
1054                 # Sub-entries
1055                 foreach ( $block as $rcObj ) {
1056                         # Classes to apply -- TODO implement
1057                         $classes = array();
1058                         $type = $rcObj->mAttribs['rc_type'];
1059
1060                         $trClass = $rcObj->watched && $rcObj->mAttribs['rc_timestamp'] >= $rcObj->watched
1061                                 ? ' class="mw-enhanced-watched"' : '';
1062
1063                         $r .= '<tr' . $trClass . '><td></td><td class="mw-enhanced-rc">';
1064                         $r .= $this->recentChangesFlags( array(
1065                                 'newpage' => $type == RC_NEW,
1066                                 'minor' => $rcObj->mAttribs['rc_minor'],
1067                                 'unpatrolled' => $rcObj->unpatrolled,
1068                                 'bot' => $rcObj->mAttribs['rc_bot'],
1069                         ) );
1070                         $r .= '&#160;</td><td class="mw-enhanced-rc-nested"><span class="mw-enhanced-rc-time">';
1071
1072                         $params = $queryParams;
1073
1074                         if ( $rcObj->mAttribs['rc_this_oldid'] != 0 ) {
1075                                 $params['oldid'] = $rcObj->mAttribs['rc_this_oldid'];
1076                         }
1077
1078                         # Log timestamp
1079                         if ( $type == RC_LOG ) {
1080                                 $link = $rcObj->timestamp;
1081                         # Revision link
1082                         } elseif ( !ChangesList::userCan( $rcObj, Revision::DELETED_TEXT, $this->getUser() ) ) {
1083                                 $link = '<span class="history-deleted">' . $rcObj->timestamp . '</span> ';
1084                         } else {
1085
1086                                 $link = Linker::linkKnown(
1087                                                 $rcObj->getTitle(),
1088                                                 $rcObj->timestamp,
1089                                                 array(),
1090                                                 $params
1091                                         );
1092                                 if ( $this->isDeleted( $rcObj, Revision::DELETED_TEXT ) ) {
1093                                         $link = '<span class="history-deleted">' . $link . '</span> ';
1094                                 }
1095                         }
1096                         $r .= $link . '</span>';
1097
1098                         if ( !$type == RC_LOG || $type == RC_NEW ) {
1099                                 $r .= ' ' . $this->msg( 'parentheses' )->rawParams( $rcObj->curlink . $this->message['pipe-separator'] . $rcObj->lastlink )->escaped();
1100                         }
1101                         $r .= ' <span class="mw-changeslist-separator">. .</span> ';
1102
1103                         # Character diff
1104                         if ( $wgRCShowChangedSize ) {
1105                                 $cd = $this->formatCharacterDifference( $rcObj );
1106                                 if ( $cd !== '' ) {
1107                                         $r .= $cd . ' <span class="mw-changeslist-separator">. .</span> ';
1108                                 }
1109                         }
1110
1111                         if ( $rcObj->mAttribs['rc_type'] == RC_LOG ) {
1112                                 $r .= $this->insertLogEntry( $rcObj );
1113                         } else {
1114                                 # User links
1115                                 $r .= $rcObj->userlink;
1116                                 $r .= $rcObj->usertalklink;
1117                                 $r .= $this->insertComment( $rcObj );
1118                         }
1119
1120                         # Rollback
1121                         $this->insertRollback( $r, $rcObj );
1122                         # Tags
1123                         $this->insertTags( $r, $rcObj, $classes );
1124
1125                         $r .= "</td></tr>\n";
1126                 }
1127                 $r .= "</table>\n";
1128
1129                 $this->rcCacheIndex++;
1130
1131                 wfProfileOut( __METHOD__ );
1132
1133                 return $r;
1134         }
1135
1136         /**
1137          * Generate HTML for an arrow or placeholder graphic
1138          * @param string $dir one of '', 'd', 'l', 'r'
1139          * @param string $alt text
1140          * @param string $title text
1141          * @return String: HTML "<img>" tag
1142          */
1143         protected function arrow( $dir, $alt = '', $title = '' ) {
1144                 global $wgStylePath;
1145                 $encUrl = htmlspecialchars( $wgStylePath . '/common/images/Arr_' . $dir . '.png' );
1146                 $encAlt = htmlspecialchars( $alt );
1147                 $encTitle = htmlspecialchars( $title );
1148                 return "<img src=\"$encUrl\" width=\"12\" height=\"12\" alt=\"$encAlt\" title=\"$encTitle\" />";
1149         }
1150
1151         /**
1152          * Generate HTML for a right- or left-facing arrow,
1153          * depending on language direction.
1154          * @return String: HTML "<img>" tag
1155          */
1156         protected function sideArrow() {
1157                 $dir = $this->getLanguage()->isRTL() ? 'l' : 'r';
1158                 return $this->arrow( $dir, '+', $this->msg( 'rc-enhanced-expand' )->text() );
1159         }
1160
1161         /**
1162          * Generate HTML for a down-facing arrow
1163          * depending on language direction.
1164          * @return String: HTML "<img>" tag
1165          */
1166         protected function downArrow() {
1167                 return $this->arrow( 'd', '-', $this->msg( 'rc-enhanced-hide' )->text() );
1168         }
1169
1170         /**
1171          * Generate HTML for a spacer image
1172          * @return String: HTML "<img>" tag
1173          */
1174         protected function spacerArrow() {
1175                 return $this->arrow( '', codepointToUtf8( 0xa0 ) ); // non-breaking space
1176         }
1177
1178         /**
1179          * Enhanced RC ungrouped line.
1180          *
1181          * @param $rcObj RecentChange
1182          * @return String: a HTML formatted line (generated using $r)
1183          */
1184         protected function recentChangesBlockLine( $rcObj ) {
1185                 global $wgRCShowChangedSize;
1186
1187                 wfProfileIn( __METHOD__ );
1188                 $query['curid'] = $rcObj->mAttribs['rc_cur_id'];
1189
1190                 $type = $rcObj->mAttribs['rc_type'];
1191                 $logType = $rcObj->mAttribs['rc_log_type'];
1192                 $classes = array( 'mw-enhanced-rc' );
1193                 if ( $logType ) {
1194                         # Log entry
1195                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-log-'
1196                                         . $logType . '-' . $rcObj->mAttribs['rc_title'] );
1197                 } else {
1198                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-ns' .
1199                                         $rcObj->mAttribs['rc_namespace'] . '-' . $rcObj->mAttribs['rc_title'] );
1200                 }
1201                 $classes[] = $rcObj->watched && $rcObj->mAttribs['rc_timestamp'] >= $rcObj->watched
1202                         ? 'mw-changeslist-line-watched' : 'mw-changeslist-line-not-watched';
1203                 $r = Html::openElement( 'table', array( 'class' => $classes ) ) .
1204                         Html::openElement( 'tr' );
1205
1206                 $r .= '<td class="mw-enhanced-rc"><span class="mw-enhancedchanges-arrow-space"></span>';
1207                 # Flag and Timestamp
1208                 if ( $type == RC_MOVE || $type == RC_MOVE_OVER_REDIRECT ) {
1209                         $r .= '&#160;&#160;&#160;&#160;'; // 4 flags -> 4 spaces
1210                 } else {
1211                         $r .= $this->recentChangesFlags( array(
1212                                 'newpage' => $type == RC_NEW,
1213                                 'minor' => $rcObj->mAttribs['rc_minor'],
1214                                 'unpatrolled' => $rcObj->unpatrolled,
1215                                 'bot' => $rcObj->mAttribs['rc_bot'],
1216                         ) );
1217                 }
1218                 $r .= '&#160;' . $rcObj->timestamp . '&#160;</td><td>';
1219                 # Article or log link
1220                 if ( $logType ) {
1221                         $logPage = new LogPage( $logType );
1222                         $logTitle = SpecialPage::getTitleFor( 'Log', $logType );
1223                         $logName = $logPage->getName()->escaped();
1224                         $r .= $this->msg( 'parentheses' )->rawParams( Linker::linkKnown( $logTitle, $logName ) )->escaped();
1225                 } else {
1226                         $this->insertArticleLink( $r, $rcObj, $rcObj->unpatrolled, $rcObj->watched );
1227                 }
1228                 # Diff and hist links
1229                 if ( $type != RC_LOG ) {
1230                         $query['action'] = 'history';
1231                         $r .= ' ' . $this->msg( 'parentheses' )->rawParams( $rcObj->difflink . $this->message['pipe-separator'] . Linker::linkKnown(
1232                                 $rcObj->getTitle(),
1233                                 $this->message['hist'],
1234                                 array(),
1235                                 $query
1236                         ) )->escaped();
1237                 }
1238                 $r .= ' <span class="mw-changeslist-separator">. .</span> ';
1239                 # Character diff
1240                 if ( $wgRCShowChangedSize ) {
1241                         $cd = $this->formatCharacterDifference( $rcObj );
1242                         if ( $cd !== '' ) {
1243                                 $r .= $cd . ' <span class="mw-changeslist-separator">. .</span> ';
1244                         }
1245                 }
1246
1247                 if ( $type == RC_LOG ) {
1248                         $r .= $this->insertLogEntry( $rcObj );
1249                 } else {
1250                         $r .= ' ' . $rcObj->userlink . $rcObj->usertalklink;
1251                         $r .= $this->insertComment( $rcObj );
1252                         $this->insertRollback( $r, $rcObj );
1253                 }
1254
1255                 # Tags
1256                 $this->insertTags( $r, $rcObj, $classes );
1257                 # Show how many people are watching this if enabled
1258                 $r .= $this->numberofWatchingusers( $rcObj->numberofWatchingusers );
1259
1260                 $r .= "</td></tr></table>\n";
1261
1262                 wfProfileOut( __METHOD__ );
1263
1264                 return $r;
1265         }
1266
1267         /**
1268          * If enhanced RC is in use, this function takes the previously cached
1269          * RC lines, arranges them, and outputs the HTML
1270          *
1271          * @return string
1272          */
1273         protected function recentChangesBlock() {
1274                 if ( count ( $this->rc_cache ) == 0 ) {
1275                         return '';
1276                 }
1277
1278                 wfProfileIn( __METHOD__ );
1279
1280                 $blockOut = '';
1281                 foreach ( $this->rc_cache as $block ) {
1282                         if ( count( $block ) < 2 ) {
1283                                 $blockOut .= $this->recentChangesBlockLine( array_shift( $block ) );
1284                         } else {
1285                                 $blockOut .= $this->recentChangesBlockGroup( $block );
1286                         }
1287                 }
1288
1289                 wfProfileOut( __METHOD__ );
1290
1291                 return '<div>' . $blockOut . '</div>';
1292         }
1293
1294         /**
1295          * Returns text for the end of RC
1296          * If enhanced RC is in use, returns pretty much all the text
1297          * @return string
1298          */
1299         public function endRecentChangesList() {
1300                 return $this->recentChangesBlock() . parent::endRecentChangesList();
1301         }
1302
1303 }