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', 'enhancedrc-history', '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         public function recentChangesFlags( $flags, $nothing = '&#160;' ) {
 140                 global $wgRecentChangesFlags;
 141                 $f = '';
 142                 foreach ( array_keys( $wgRecentChangesFlags ) as $flag ) {
 143                         $f .= isset( $flags[$flag] ) && $flags[$flag]
 144                                 ? self::flag( $flag )
 145                                 : $nothing;
 146                 }
 147                 return $f;
 148         }
 149
 150         /**
 151          * Provide the "<abbr>" element appropriate to a given abbreviated flag,
 152          * namely the flag indicating a new page, a minor edit, a bot edit, or an
 153          * unpatrolled edit.  By default in English it will contain "N", "m", "b",
 154          * "!" respectively, plus it will have an appropriate title and class.
 155          *
 156          * @param string $flag One key of $wgRecentChangesFlags
 157          * @return String: Raw HTML
 158          */
 159         public static function flag( $flag ) {
 160                 static $flagInfos = null;
 161                 if ( is_null( $flagInfos ) ) {
 162                         global $wgRecentChangesFlags;
 163                         $flagInfos = array();
 164                         foreach ( $wgRecentChangesFlags as $key => $value ) {
 165                                 $flagInfos[$key]['letter'] = wfMessage( $value['letter'] )->escaped();
 166                                 $flagInfos[$key]['title'] = wfMessage( $value['title'] )->escaped();
 167                                 // Allow customized class name, fall back to flag name
 168                                 $flagInfos[$key]['class'] = Sanitizer::escapeClass(
 169                                         isset( $value['class'] ) ? $value['class'] : $key );
 170                         }
 171                 }
 172
 173                 // Inconsistent naming, bleh, kepted for b/c
 174                 $map = array(
 175                         'minoredit' => 'minor',
 176                         'botedit' => 'bot',
 177                 );
 178                 if ( isset( $map[$flag] ) ) {
 179                         $flag = $map[$flag];
 180                 }
 181
 182                 return "<abbr class='" . $flagInfos[$flag]['class'] . "' title='" . $flagInfos[$flag]['title'] . "'>" .
 183                         $flagInfos[$flag]['letter'] .
 184                         '</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                 $params = array();
 366
 367                 $articlelink = Linker::linkKnown(
 368                         $rc->getTitle(),
 369                         null,
 370                         array( 'class' => 'mw-changeslist-title' ),
 371                         $params
 372                 );
 373                 if ( $this->isDeleted( $rc, Revision::DELETED_TEXT ) ) {
 374                         $articlelink = '<span class="history-deleted">' . $articlelink . '</span>';
 375                 }
 376                 # To allow for boldening pages watched by this user
 377                 $articlelink = "<span class=\"mw-title\">{$articlelink}</span>";
 378                 # RTL/LTR marker
 379                 $articlelink .= $this->getLanguage()->getDirMark();
 380
 381                 wfRunHooks( 'ChangesListInsertArticleLink',
 382                         array( &$this, &$articlelink, &$s, &$rc, $unpatrolled, $watched ) );
 383
 384                 $s .= " $articlelink";
 385         }
 386
 387         /**
 388          * Get the timestamp from $rc formatted with current user's settings
 389          * and a separator
 390          *
 391          * @param $rc RecentChange
 392          * @return string HTML fragment
 393          */
 394         public function getTimestamp( $rc ) {
 395                 return $this->message['semicolon-separator'] . '<span class="mw-changeslist-date">' .
 396                         $this->getLanguage()->userTime( $rc->mAttribs['rc_timestamp'], $this->getUser() ) . '</span> <span class="mw-changeslist-separator">. .</span> ';
 397         }
 398
 399         /**
 400          * Insert time timestamp string from $rc into $s
 401          *
 402          * @param string $s HTML to update
 403          * @param $rc RecentChange
 404          */
 405         public function insertTimestamp( &$s, $rc ) {
 406                 $s .= $this->getTimestamp( $rc );
 407         }
 408
 409         /**
 410          * Insert links to user page, user talk page and eventually a blocking link
 411          *
 412          * @param &$s String HTML to update
 413          * @param &$rc RecentChange
 414          */
 415         public function insertUserRelatedLinks( &$s, &$rc ) {
 416                 if ( $this->isDeleted( $rc, Revision::DELETED_USER ) ) {
 417                         $s .= ' <span class="history-deleted">' . $this->msg( 'rev-deleted-user' )->escaped() . '</span>';
 418                 } else {
 419                         $s .= $this->getLanguage()->getDirMark() . Linker::userLink( $rc->mAttribs['rc_user'],
 420                                 $rc->mAttribs['rc_user_text'] );
 421                         $s .= Linker::userToolLinks( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 422                 }
 423         }
 424
 425         /**
 426          * Insert a formatted action
 427          *
 428          * @param $rc RecentChange
 429          * @return string
 430          */
 431         public function insertLogEntry( $rc ) {
 432                 $formatter = LogFormatter::newFromRow( $rc->mAttribs );
 433                 $formatter->setContext( $this->getContext() );
 434                 $formatter->setShowUserToolLinks( true );
 435                 $mark = $this->getLanguage()->getDirMark();
 436                 return $formatter->getActionText() . " $mark" . $formatter->getComment();
 437         }
 438
 439         /**
 440          * Insert a formatted comment
 441          * @param $rc RecentChange
 442          * @return string
 443          */
 444         public function insertComment( $rc ) {
 445                 if ( $rc->mAttribs['rc_type'] != RC_MOVE && $rc->mAttribs['rc_type'] != RC_MOVE_OVER_REDIRECT ) {
 446                         if ( $this->isDeleted( $rc, Revision::DELETED_COMMENT ) ) {
 447                                 return ' <span class="history-deleted">' . $this->msg( 'rev-deleted-comment' )->escaped() . '</span>';
 448                         } else {
 449                                 return Linker::commentBlock( $rc->mAttribs['rc_comment'], $rc->getTitle() );
 450                         }
 451                 }
 452                 return '';
 453         }
 454
 455         /**
 456          * Check whether to enable recent changes patrol features
 457          *
 458          * @deprecated since 1.22
 459          * @return Boolean
 460          */
 461         public static function usePatrol() {
 462                 global $wgUser;
 463
 464                 wfDeprecated( __METHOD__, '1.22' );
 465
 466                 return $wgUser->useRCPatrol();
 467         }
 468
 469         /**
 470          * Returns the string which indicates the number of watching users
 471          * @return string
 472          */
 473         protected function numberofWatchingusers( $count ) {
 474                 static $cache = array();
 475                 if ( $count > 0 ) {
 476                         if ( !isset( $cache[$count] ) ) {
 477                                 $cache[$count] = $this->msg( 'number_of_watching_users_RCview' )->numParams( $count )->escaped();
 478                         }
 479                         return $cache[$count];
 480                 } else {
 481                         return '';
 482                 }
 483         }
 484
 485         /**
 486          * Determine if said field of a revision is hidden
 487          * @param $rc RCCacheEntry
 488          * @param $field Integer: one of DELETED_* bitfield constants
 489          * @return Boolean
 490          */
 491         public static function isDeleted( $rc, $field ) {
 492                 return ( $rc->mAttribs['rc_deleted'] & $field ) == $field;
 493         }
 494
 495         /**
 496          * Determine if the current user is allowed to view a particular
 497          * field of this revision, if it's marked as deleted.
 498          * @param $rc RCCacheEntry
 499          * @param $field Integer
 500          * @param $user User object to check, or null to use $wgUser
 501          * @return Boolean
 502          */
 503         public static function userCan( $rc, $field, User $user = null ) {
 504                 if ( $rc->mAttribs['rc_type'] == RC_LOG ) {
 505                         return LogEventsList::userCanBitfield( $rc->mAttribs['rc_deleted'], $field, $user );
 506                 } else {
 507                         return Revision::userCanBitfield( $rc->mAttribs['rc_deleted'], $field, $user );
 508                 }
 509         }
 510
 511         /**
 512          * @param $link string
 513          * @param $watched bool
 514          * @return string
 515          */
 516         protected function maybeWatchedLink( $link, $watched = false ) {
 517                 if ( $watched ) {
 518                         return '<strong class="mw-watched">' . $link . '</strong>';
 519                 } else {
 520                         return '<span class="mw-rc-unwatched">' . $link . '</span>';
 521                 }
 522         }
 523
 524         /** Inserts a rollback link
 525          *
 526          * @param $s string
 527          * @param $rc RecentChange
 528          */
 529         public function insertRollback( &$s, &$rc ) {
 530                 if ( $rc->mAttribs['rc_type'] == RC_EDIT && $rc->mAttribs['rc_this_oldid'] && $rc->mAttribs['rc_cur_id'] ) {
 531                         $page = $rc->getTitle();
 532                         /** Check for rollback and edit permissions, disallow special pages, and only
 533                           * show a link on the top-most revision */
 534                         if ( $this->getUser()->isAllowed( 'rollback' ) && $rc->mAttribs['page_latest'] == $rc->mAttribs['rc_this_oldid'] )
 535                         {
 536                                 $rev = new Revision( array(
 537                                         'title' => $page,
 538                                         'id' => $rc->mAttribs['rc_this_oldid'],
 539                                         'user' => $rc->mAttribs['rc_user'],
 540                                         'user_text' => $rc->mAttribs['rc_user_text'],
 541                                         'deleted' => $rc->mAttribs['rc_deleted']
 542                                 ) );
 543                                 $s .= ' ' . Linker::generateRollback( $rev, $this->getContext() );
 544                         }
 545                 }
 546         }
 547
 548         /**
 549          * @param $s string
 550          * @param $rc RecentChange
 551          * @param $classes
 552          */
 553         public function insertTags( &$s, &$rc, &$classes ) {
 554                 if ( empty( $rc->mAttribs['ts_tags'] ) ) {
 555                         return;
 556                 }
 557
 558                 list( $tagSummary, $newClasses ) = ChangeTags::formatSummaryRow( $rc->mAttribs['ts_tags'], 'changeslist' );
 559                 $classes = array_merge( $classes, $newClasses );
 560                 $s .= ' ' . $tagSummary;
 561         }
 562
 563         public function insertExtra( &$s, &$rc, &$classes ) {
 564                 // Empty, used for subclasses to add anything special.
 565         }
 566
 567         protected function showAsUnpatrolled( RecentChange $rc ) {
 568                 $unpatrolled = false;
 569                 if ( !$rc->mAttribs['rc_patrolled'] ) {
 570                         if ( $this->getUser()->useRCPatrol() ) {
 571                                 $unpatrolled = true;
 572                         } elseif ( $this->getUser()->useNPPatrol() && $rc->mAttribs['rc_type'] == RC_NEW ) {
 573                                 $unpatrolled = true;
 574                         }
 575                 }
 576                 return $unpatrolled;
 577         }
 578 }
 579
 580 /**
 581  * Generate a list of changes using the good old system (no javascript)
 582  */
 583 class OldChangesList extends ChangesList {
 584         /**
 585          * Format a line using the old system (aka without any javascript).
 586          *
 587          * @param $rc RecentChange, passed by reference
 588          * @param bool $watched (default false)
 589          * @param int $linenumber (default null)
 590          *
 591          * @return string|bool
 592          */
 593         public function recentChangesLine( &$rc, $watched = false, $linenumber = null ) {
 594                 global $wgRCShowChangedSize;
 595                 wfProfileIn( __METHOD__ );
 596
 597                 # Should patrol-related stuff be shown?
 598                 $unpatrolled = $this->showAsUnpatrolled( $rc );
 599
 600                 $dateheader = ''; // $s now contains only <li>...</li>, for hooks' convenience.
 601                 $this->insertDateHeader( $dateheader, $rc->mAttribs['rc_timestamp'] );
 602
 603                 $s = '';
 604                 $classes = array();
 605                 // use mw-line-even/mw-line-odd class only if linenumber is given (feature from bug 14468)
 606                 if ( $linenumber ) {
 607                         if ( $linenumber & 1 ) {
 608                                 $classes[] = 'mw-line-odd';
 609                         } else {
 610                                 $classes[] = 'mw-line-even';
 611                         }
 612                 }
 613
 614                 // Indicate watched status on the line to allow for more
 615                 // comprehensive styling.
 616                 $classes[] = $watched && $rc->mAttribs['rc_timestamp'] >= $watched
 617                         ? 'mw-changeslist-line-watched' : 'mw-changeslist-line-not-watched';
 618
 619                 // Moved pages (very very old, not supported anymore)
 620                 if ( $rc->mAttribs['rc_type'] == RC_MOVE || $rc->mAttribs['rc_type'] == RC_MOVE_OVER_REDIRECT ) {
 621                 // Log entries
 622                 } elseif ( $rc->mAttribs['rc_log_type'] ) {
 623                         $logtitle = SpecialPage::getTitleFor( 'Log', $rc->mAttribs['rc_log_type'] );
 624                         $this->insertLog( $s, $logtitle, $rc->mAttribs['rc_log_type'] );
 625                 // Log entries (old format) or log targets, and special pages
 626                 } elseif ( $rc->mAttribs['rc_namespace'] == NS_SPECIAL ) {
 627                         list( $name, $subpage ) = SpecialPageFactory::resolveAlias( $rc->mAttribs['rc_title'] );
 628                         if ( $name == 'Log' ) {
 629                                 $this->insertLog( $s, $rc->getTitle(), $subpage );
 630                         }
 631                 // Regular entries
 632                 } else {
 633                         $this->insertDiffHist( $s, $rc, $unpatrolled );
 634                         # M, N, b and ! (minor, new, bot and unpatrolled)
 635                         $s .= $this->recentChangesFlags(
 636                                 array(
 637                                         'newpage' => $rc->mAttribs['rc_type'] == RC_NEW,
 638                                         'minor' => $rc->mAttribs['rc_minor'],
 639                                         'unpatrolled' => $unpatrolled,
 640                                         'bot' => $rc->mAttribs['rc_bot']
 641                                 ),
 642                                 ''
 643                         );
 644                         $this->insertArticleLink( $s, $rc, $unpatrolled, $watched );
 645                 }
 646                 # Edit/log timestamp
 647                 $this->insertTimestamp( $s, $rc );
 648                 # Bytes added or removed
 649                 if ( $wgRCShowChangedSize ) {
 650                         $cd = $this->formatCharacterDifference( $rc );
 651                         if ( $cd !== '' ) {
 652                                 $s .= $cd . '  <span class="mw-changeslist-separator">. .</span> ';
 653                         }
 654                 }
 655
 656                 if ( $rc->mAttribs['rc_type'] == RC_LOG ) {
 657                         $s .= $this->insertLogEntry( $rc );
 658                 } else {
 659                         # User tool links
 660                         $this->insertUserRelatedLinks( $s, $rc );
 661                         # LTR/RTL direction mark
 662                         $s .= $this->getLanguage()->getDirMark();
 663                         $s .= $this->insertComment( $rc );
 664                 }
 665
 666                 # Tags
 667                 $this->insertTags( $s, $rc, $classes );
 668                 # Rollback
 669                 $this->insertRollback( $s, $rc );
 670                 # For subclasses
 671                 $this->insertExtra( $s, $rc, $classes );
 672
 673                 # How many users watch this page
 674                 if ( $rc->numberofWatchingusers > 0 ) {
 675                         $s .= ' ' . $this->numberofWatchingusers( $rc->numberofWatchingusers );
 676                 }
 677
 678                 if ( $this->watchlist ) {
 679                         $classes[] = Sanitizer::escapeClass( 'watchlist-' . $rc->mAttribs['rc_namespace'] . '-' . $rc->mAttribs['rc_title'] );
 680                 }
 681
 682                 if ( !wfRunHooks( 'OldChangesListRecentChangesLine', array( &$this, &$s, $rc, &$classes ) ) ) {
 683                         wfProfileOut( __METHOD__ );
 684                         return false;
 685                 }
 686
 687                 wfProfileOut( __METHOD__ );
 688                 return "$dateheader<li class=\"" . implode( ' ', $classes ) . "\">" . $s . "</li>\n";
 689         }
 690 }
 691
 692 /**
 693  * Generate a list of changes using an Enhanced system (uses javascript).
 694  */
 695 class EnhancedChangesList extends ChangesList {
 696
 697         protected $rc_cache;
 698
 699         /**
 700          * Add the JavaScript file for enhanced changeslist
 701          * @return String
 702          */
 703         public function beginRecentChangesList() {
 704                 $this->rc_cache = array();
 705                 $this->rcMoveIndex = 0;
 706                 $this->rcCacheIndex = 0;
 707                 $this->lastdate = '';
 708                 $this->rclistOpen = false;
 709                 $this->getOutput()->addModuleStyles( array(
 710                         'mediawiki.special.changeslist',
 711                         'mediawiki.special.changeslist.enhanced',
 712                 ) );
 713                 $this->getOutput()->addModules( array(
 714                         'jquery.makeCollapsible',
 715                         'mediawiki.icon',
 716                 ) );
 717                 return '';
 718         }
 719         /**
 720          * Format a line for enhanced recentchange (aka with javascript and block of lines).
 721          *
 722          * @param $baseRC RecentChange
 723          * @param $watched bool
 724          *
 725          * @return string
 726          */
 727         public function recentChangesLine( &$baseRC, $watched = false ) {
 728                 wfProfileIn( __METHOD__ );
 729
 730                 # Create a specialised object
 731                 $rc = RCCacheEntry::newFromParent( $baseRC );
 732
 733                 $curIdEq = array( 'curid' => $rc->mAttribs['rc_cur_id'] );
 734
 735                 # If it's a new day, add the headline and flush the cache
 736                 $date = $this->getLanguage()->userDate( $rc->mAttribs['rc_timestamp'], $this->getUser() );
 737                 $ret = '';
 738                 if ( $date != $this->lastdate ) {
 739                         # Process current cache
 740                         $ret = $this->recentChangesBlock();
 741                         $this->rc_cache = array();
 742                         $ret .= Xml::element( 'h4', null, $date ) . "\n";
 743                         $this->lastdate = $date;
 744                 }
 745
 746                 # Should patrol-related stuff be shown?
 747                 $rc->unpatrolled = $this->showAsUnpatrolled( $rc );
 748
 749                 $showdifflinks = true;
 750                 # Make article link
 751                 $type = $rc->mAttribs['rc_type'];
 752                 $logType = $rc->mAttribs['rc_log_type'];
 753                 // Page moves, very old style, not supported anymore
 754                 if ( $type == RC_MOVE || $type == RC_MOVE_OVER_REDIRECT ) {
 755                 // New unpatrolled pages
 756                 } elseif ( $rc->unpatrolled && $type == RC_NEW ) {
 757                         $clink = Linker::linkKnown( $rc->getTitle() );
 758                 // Log entries
 759                 } elseif ( $type == RC_LOG ) {
 760                         if ( $logType ) {
 761                                 $logtitle = SpecialPage::getTitleFor( 'Log', $logType );
 762                                 $logpage = new LogPage( $logType );
 763                                 $logname = $logpage->getName()->escaped();
 764                                 $clink = $this->msg( 'parentheses' )->rawParams( Linker::linkKnown( $logtitle, $logname ) )->escaped();
 765                         } else {
 766                                 $clink = Linker::link( $rc->getTitle() );
 767                         }
 768                         $watched = false;
 769                 // Log entries (old format) and special pages
 770                 } elseif ( $rc->mAttribs['rc_namespace'] == NS_SPECIAL ) {
 771                         wfDebug( "Unexpected special page in recentchanges\n" );
 772                         $clink = '';
 773                 // Edits
 774                 } else {
 775                         $clink = Linker::linkKnown( $rc->getTitle() );
 776                 }
 777
 778                 # Don't show unusable diff links
 779                 if ( !ChangesList::userCan( $rc, Revision::DELETED_TEXT, $this->getUser() ) ) {
 780                         $showdifflinks = false;
 781                 }
 782
 783                 $time = $this->getLanguage()->userTime( $rc->mAttribs['rc_timestamp'], $this->getUser() );
 784                 $rc->watched = $watched;
 785                 $rc->link = $clink;
 786                 $rc->timestamp = $time;
 787                 $rc->numberofWatchingusers = $baseRC->numberofWatchingusers;
 788
 789                 # Make "cur" and "diff" links.  Do not use link(), it is too slow if
 790                 # called too many times (50% of CPU time on RecentChanges!).
 791                 $thisOldid = $rc->mAttribs['rc_this_oldid'];
 792                 $lastOldid = $rc->mAttribs['rc_last_oldid'];
 793
 794                 $querycur = $curIdEq + array( 'diff' => '0', 'oldid' => $thisOldid );
 795                 $querydiff = $curIdEq + array( 'diff' => $thisOldid, 'oldid' => $lastOldid );
 796
 797                 if ( !$showdifflinks ) {
 798                         $curLink = $this->message['cur'];
 799                         $diffLink = $this->message['diff'];
 800                 } elseif ( in_array( $type, array( RC_NEW, RC_LOG, RC_MOVE, RC_MOVE_OVER_REDIRECT ) ) ) {
 801                         if ( $type != RC_NEW ) {
 802                                 $curLink = $this->message['cur'];
 803                         } else {
 804                                 $curUrl = htmlspecialchars( $rc->getTitle()->getLinkURL( $querycur ) );
 805                                 $curLink = "<a href=\"$curUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['cur']}</a>";
 806                         }
 807                         $diffLink = $this->message['diff'];
 808                 } else {
 809                         $diffUrl = htmlspecialchars( $rc->getTitle()->getLinkURL( $querydiff ) );
 810                         $curUrl = htmlspecialchars( $rc->getTitle()->getLinkURL( $querycur ) );
 811                         $diffLink = "<a href=\"$diffUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['diff']}</a>";
 812                         $curLink = "<a href=\"$curUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['cur']}</a>";
 813                 }
 814
 815                 # Make "last" link
 816                 if ( !$showdifflinks || !$lastOldid ) {
 817                         $lastLink = $this->message['last'];
 818                 } elseif ( in_array( $type, array( RC_LOG, RC_MOVE, RC_MOVE_OVER_REDIRECT ) ) ) {
 819                         $lastLink = $this->message['last'];
 820                 } else {
 821                         $lastLink = Linker::linkKnown( $rc->getTitle(), $this->message['last'],
 822                                 array(), $curIdEq + array( 'diff' => $thisOldid, 'oldid' => $lastOldid ) );
 823                 }
 824
 825                 # Make user links
 826                 if ( $this->isDeleted( $rc, Revision::DELETED_USER ) ) {
 827                         $rc->userlink = ' <span class="history-deleted">' . $this->msg( 'rev-deleted-user' )->escaped() . '</span>';
 828                 } else {
 829                         $rc->userlink = Linker::userLink( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 830                         $rc->usertalklink = Linker::userToolLinks( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 831                 }
 832
 833                 $rc->lastlink = $lastLink;
 834                 $rc->curlink = $curLink;
 835                 $rc->difflink = $diffLink;
 836
 837                 # Put accumulated information into the cache, for later display
 838                 # Page moves go on their own line
 839                 $title = $rc->getTitle();
 840                 $secureName = $title->getPrefixedDBkey();
 841                 if ( $type == RC_MOVE || $type == RC_MOVE_OVER_REDIRECT ) {
 842                         # Use an @ character to prevent collision with page names
 843                         $this->rc_cache['@@' . ( $this->rcMoveIndex++ )] = array( $rc );
 844                 } else {
 845                         # Logs are grouped by type
 846                         if ( $type == RC_LOG ) {
 847                                 $secureName = SpecialPage::getTitleFor( 'Log', $logType )->getPrefixedDBkey();
 848                         }
 849                         if ( !isset( $this->rc_cache[$secureName] ) ) {
 850                                 $this->rc_cache[$secureName] = array();
 851                         }
 852
 853                         array_push( $this->rc_cache[$secureName], $rc );
 854                 }
 855
 856                 wfProfileOut( __METHOD__ );
 857
 858                 return $ret;
 859         }
 860
 861         /**
 862          * Enhanced RC group
 863          * @return string
 864          */
 865         protected function recentChangesBlockGroup( $block ) {
 866                 global $wgRCShowChangedSize;
 867
 868                 wfProfileIn( __METHOD__ );
 869
 870                 # Add the namespace and title of the block as part of the class
 871                 $classes = array( 'mw-collapsible', 'mw-collapsed', 'mw-enhanced-rc' );
 872                 if ( $block[0]->mAttribs['rc_log_type'] ) {
 873                         # Log entry
 874                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-log-'
 875                                         . $block[0]->mAttribs['rc_log_type'] . '-' . $block[0]->mAttribs['rc_title'] );
 876                 } else {
 877                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-ns'
 878                                         . $block[0]->mAttribs['rc_namespace'] . '-' . $block[0]->mAttribs['rc_title'] );
 879                 }
 880                 $classes[] = $block[0]->watched && $block[0]->mAttribs['rc_timestamp'] >= $block[0]->watched
 881                         ? 'mw-changeslist-line-watched' : 'mw-changeslist-line-not-watched';
 882                 $r = Html::openElement( 'table', array( 'class' => $classes ) ) .
 883                         Html::openElement( 'tr' );
 884
 885                 # Collate list of users
 886                 $userlinks = array();
 887                 # Other properties
 888                 $unpatrolled = false;
 889                 $isnew = false;
 890                 $allBots = true;
 891                 $allMinors = true;
 892                 $curId = $currentRevision = 0;
 893                 # Some catalyst variables...
 894                 $namehidden = true;
 895                 $allLogs = true;
 896                 foreach ( $block as $rcObj ) {
 897                         $oldid = $rcObj->mAttribs['rc_last_oldid'];
 898                         if ( $rcObj->mAttribs['rc_type'] == RC_NEW ) {
 899                                 $isnew = true;
 900                         }
 901                         // If all log actions to this page were hidden, then don't
 902                         // give the name of the affected page for this block!
 903                         if ( !$this->isDeleted( $rcObj, LogPage::DELETED_ACTION ) ) {
 904                                 $namehidden = false;
 905                         }
 906                         $u = $rcObj->userlink;
 907                         if ( !isset( $userlinks[$u] ) ) {
 908                                 $userlinks[$u] = 0;
 909                         }
 910                         if ( $rcObj->unpatrolled ) {
 911                                 $unpatrolled = true;
 912                         }
 913                         if ( $rcObj->mAttribs['rc_type'] != RC_LOG ) {
 914                                 $allLogs = false;
 915                         }
 916                         # Get the latest entry with a page_id and oldid
 917                         # since logs may not have these.
 918                         if ( !$curId && $rcObj->mAttribs['rc_cur_id'] ) {
 919                                 $curId = $rcObj->mAttribs['rc_cur_id'];
 920                         }
 921                         if ( !$currentRevision && $rcObj->mAttribs['rc_this_oldid'] ) {
 922                                 $currentRevision = $rcObj->mAttribs['rc_this_oldid'];
 923                         }
 924
 925                         if ( !$rcObj->mAttribs['rc_bot'] ) {
 926                                 $allBots = false;
 927                         }
 928                         if ( !$rcObj->mAttribs['rc_minor'] ) {
 929                                 $allMinors = false;
 930                         }
 931
 932                         $userlinks[$u]++;
 933                 }
 934
 935                 # Sort the list and convert to text
 936                 krsort( $userlinks );
 937                 asort( $userlinks );
 938                 $users = array();
 939                 foreach ( $userlinks as $userlink => $count ) {
 940                         $text = $userlink;
 941                         $text .= $this->getLanguage()->getDirMark();
 942                         if ( $count > 1 ) {
 943                                 $text .= ' ' . $this->msg( 'parentheses' )->rawParams( $this->getLanguage()->formatNum( $count ) . '×' )->escaped();
 944                         }
 945                         array_push( $users, $text );
 946                 }
 947
 948                 $users = ' <span class="changedby">'
 949                         . $this->msg( 'brackets' )->rawParams(
 950                                 implode( $this->message['semicolon-separator'], $users )
 951                         )->escaped() . '</span>';
 952
 953                 $tl = '<span class="mw-collapsible-toggle mw-collapsible-arrow mw-enhancedchanges-arrow mw-enhancedchanges-arrow-space"></span>';
 954                 $r .= "<td>$tl</td>";
 955
 956                 # Main line
 957                 $r .= '<td class="mw-enhanced-rc">' . $this->recentChangesFlags( array(
 958                         'newpage' => $isnew, # show, when one have this flag
 959                         'minor' => $allMinors, # show only, when all have this flag
 960                         'unpatrolled' => $unpatrolled, # show, when one have this flag
 961                         'bot' => $allBots, # show only, when all have this flag
 962                 ) );
 963
 964                 # Timestamp
 965                 $r .= '&#160;' . $block[0]->timestamp . '&#160;</td><td>';
 966
 967                 # Article link
 968                 if ( $namehidden ) {
 969                         $r .= ' <span class="history-deleted">' . $this->msg( 'rev-deleted-event' )->escaped() . '</span>';
 970                 } elseif ( $allLogs ) {
 971                         $r .= $this->maybeWatchedLink( $block[0]->link, $block[0]->watched );
 972                 } else {
 973                         $this->insertArticleLink( $r, $block[0], $block[0]->unpatrolled, $block[0]->watched );
 974                 }
 975
 976                 $r .= $this->getLanguage()->getDirMark();
 977
 978                 $queryParams['curid'] = $curId;
 979
 980                 # Changes message
 981                 static $nchanges = array();
 982                 static $sinceLastVisitMsg = array();
 983
 984                 $n = count( $block );
 985                 if ( !isset( $nchanges[$n] ) ) {
 986                         $nchanges[$n] = $this->msg( 'nchanges' )->numParams( $n )->escaped();
 987                 }
 988
 989                 $sinceLast = 0;
 990                 $unvisitedOldid = null;
 991                 foreach ( $block as $rcObj ) {
 992                         // Same logic as below inside main foreach
 993                         if ( $rcObj->watched && $rcObj->mAttribs['rc_timestamp'] >= $rcObj->watched ) {
 994                                 $sinceLast++;
 995                                 $unvisitedOldid = $rcObj->mAttribs['rc_last_oldid'];
 996                         }
 997                 }
 998                 if ( !isset( $sinceLastVisitMsg[$sinceLast] ) ) {
 999                         $sinceLastVisitMsg[$sinceLast] =
1000                                 $this->msg( 'enhancedrc-since-last-visit' )->numParams( $sinceLast )->escaped();
1001                 }
1002
1003                 # Total change link
1004                 $r .= ' ';
1005                 $logtext = '';
1006                 if ( !$allLogs ) {
1007                         if ( !ChangesList::userCan( $rcObj, Revision::DELETED_TEXT, $this->getUser() ) ) {
1008                                 $logtext .= $nchanges[$n];
1009                         } elseif ( $isnew ) {
1010                                 $logtext .= $nchanges[$n];
1011                         } else {
1012                                 $logtext .= Linker::link(
1013                                         $block[0]->getTitle(),
1014                                         $nchanges[$n],
1015                                         array(),
1016                                         $queryParams + array(
1017                                                 'diff' => $currentRevision,
1018                                                 'oldid' => $oldid,
1019                                         ),
1020                                         array( 'known', 'noclasses' )
1021                                 );
1022                                 if ( $sinceLast > 0 && $sinceLast < $n ) {
1023                                         $logtext .= $this->message['pipe-separator'] . Linker::link(
1024                                                 $block[0]->getTitle(),
1025                                                 $sinceLastVisitMsg[$sinceLast],
1026                                                 array(),
1027                                                 $queryParams + array(
1028                                                         'diff' => $currentRevision,
1029                                                         'oldid' => $unvisitedOldid,
1030                                                 ),
1031                                                 array( 'known', 'noclasses' )
1032                                         );
1033                                 }
1034                         }
1035                 }
1036
1037                 # History
1038                 if ( $allLogs ) {
1039                         // don't show history link for logs
1040                 } elseif ( $namehidden || !$block[0]->getTitle()->exists() ) {
1041                         $logtext .= $this->message['pipe-separator'] . $this->message['enhancedrc-history'];
1042                 } else {
1043                         $params = $queryParams;
1044                         $params['action'] = 'history';
1045
1046                         $logtext .= $this->message['pipe-separator'] .
1047                                 Linker::linkKnown(
1048                                         $block[0]->getTitle(),
1049                                         $this->message['enhancedrc-history'],
1050                                         array(),
1051                                         $params
1052                                 );
1053                 }
1054
1055                 if ( $logtext !== '' ) {
1056                         $r .= $this->msg( 'parentheses' )->rawParams( $logtext )->escaped();
1057                 }
1058
1059                 $r .= ' <span class="mw-changeslist-separator">. .</span> ';
1060
1061                 # Character difference (does not apply if only log items)
1062                 if ( $wgRCShowChangedSize && !$allLogs ) {
1063                         $last = 0;
1064                         $first = count( $block ) - 1;
1065                         # Some events (like logs) have an "empty" size, so we need to skip those...
1066                         while ( $last < $first && $block[$last]->mAttribs['rc_new_len'] === null ) {
1067                                 $last++;
1068                         }
1069                         while ( $first > $last && $block[$first]->mAttribs['rc_old_len'] === null ) {
1070                                 $first--;
1071                         }
1072                         # Get net change
1073                         $chardiff = $this->formatCharacterDifference( $block[$first], $block[$last] );
1074
1075                         if ( $chardiff == '' ) {
1076                                 $r .= ' ';
1077                         } else {
1078                                 $r .= ' ' . $chardiff . ' <span class="mw-changeslist-separator">. .</span> ';
1079                         }
1080                 }
1081
1082                 $r .= $users;
1083                 $r .= $this->numberofWatchingusers( $block[0]->numberofWatchingusers );
1084
1085                 # Sub-entries
1086                 foreach ( $block as $rcObj ) {
1087                         # Classes to apply -- TODO implement
1088                         $classes = array();
1089                         $type = $rcObj->mAttribs['rc_type'];
1090
1091                         $trClass = $rcObj->watched && $rcObj->mAttribs['rc_timestamp'] >= $rcObj->watched
1092                                 ? ' class="mw-enhanced-watched"' : '';
1093
1094                         $r .= '<tr' . $trClass . '><td></td><td class="mw-enhanced-rc">';
1095                         $r .= $this->recentChangesFlags( array(
1096                                 'newpage' => $type == RC_NEW,
1097                                 'minor' => $rcObj->mAttribs['rc_minor'],
1098                                 'unpatrolled' => $rcObj->unpatrolled,
1099                                 'bot' => $rcObj->mAttribs['rc_bot'],
1100                         ) );
1101                         $r .= '&#160;</td><td class="mw-enhanced-rc-nested"><span class="mw-enhanced-rc-time">';
1102
1103                         $params = $queryParams;
1104
1105                         if ( $rcObj->mAttribs['rc_this_oldid'] != 0 ) {
1106                                 $params['oldid'] = $rcObj->mAttribs['rc_this_oldid'];
1107                         }
1108
1109                         # Log timestamp
1110                         if ( $type == RC_LOG ) {
1111                                 $link = $rcObj->timestamp;
1112                         # Revision link
1113                         } elseif ( !ChangesList::userCan( $rcObj, Revision::DELETED_TEXT, $this->getUser() ) ) {
1114                                 $link = '<span class="history-deleted">' . $rcObj->timestamp . '</span> ';
1115                         } else {
1116
1117                                 $link = Linker::linkKnown(
1118                                                 $rcObj->getTitle(),
1119                                                 $rcObj->timestamp,
1120                                                 array(),
1121                                                 $params
1122                                         );
1123                                 if ( $this->isDeleted( $rcObj, Revision::DELETED_TEXT ) ) {
1124                                         $link = '<span class="history-deleted">' . $link . '</span> ';
1125                                 }
1126                         }
1127                         $r .= $link . '</span>';
1128
1129                         if ( !$type == RC_LOG || $type == RC_NEW ) {
1130                                 $r .= ' ' . $this->msg( 'parentheses' )->rawParams( $rcObj->curlink . $this->message['pipe-separator'] . $rcObj->lastlink )->escaped();
1131                         }
1132                         $r .= ' <span class="mw-changeslist-separator">. .</span> ';
1133
1134                         # Character diff
1135                         if ( $wgRCShowChangedSize ) {
1136                                 $cd = $this->formatCharacterDifference( $rcObj );
1137                                 if ( $cd !== '' ) {
1138                                         $r .= $cd . ' <span class="mw-changeslist-separator">. .</span> ';
1139                                 }
1140                         }
1141
1142                         if ( $rcObj->mAttribs['rc_type'] == RC_LOG ) {
1143                                 $r .= $this->insertLogEntry( $rcObj );
1144                         } else {
1145                                 # User links
1146                                 $r .= $rcObj->userlink;
1147                                 $r .= $rcObj->usertalklink;
1148                                 $r .= $this->insertComment( $rcObj );
1149                         }
1150
1151                         # Rollback
1152                         $this->insertRollback( $r, $rcObj );
1153                         # Tags
1154                         $this->insertTags( $r, $rcObj, $classes );
1155
1156                         $r .= "</td></tr>\n";
1157                 }
1158                 $r .= "</table>\n";
1159
1160                 $this->rcCacheIndex++;
1161
1162                 wfProfileOut( __METHOD__ );
1163
1164                 return $r;
1165         }
1166
1167         /**
1168          * Generate HTML for an arrow or placeholder graphic
1169          * @param string $dir one of '', 'd', 'l', 'r'
1170          * @param string $alt text
1171          * @param string $title text
1172          * @return String: HTML "<img>" tag
1173          */
1174         protected function arrow( $dir, $alt = '', $title = '' ) {
1175                 global $wgStylePath;
1176                 $encUrl = htmlspecialchars( $wgStylePath . '/common/images/Arr_' . $dir . '.png' );
1177                 $encAlt = htmlspecialchars( $alt );
1178                 $encTitle = htmlspecialchars( $title );
1179                 return "<img src=\"$encUrl\" width=\"12\" height=\"12\" alt=\"$encAlt\" title=\"$encTitle\" />";
1180         }
1181
1182         /**
1183          * Generate HTML for a right- or left-facing arrow,
1184          * depending on language direction.
1185          * @return String: HTML "<img>" tag
1186          */
1187         protected function sideArrow() {
1188                 $dir = $this->getLanguage()->isRTL() ? 'l' : 'r';
1189                 return $this->arrow( $dir, '+', $this->msg( 'rc-enhanced-expand' )->text() );
1190         }
1191
1192         /**
1193          * Generate HTML for a down-facing arrow
1194          * depending on language direction.
1195          * @return String: HTML "<img>" tag
1196          */
1197         protected function downArrow() {
1198                 return $this->arrow( 'd', '-', $this->msg( 'rc-enhanced-hide' )->text() );
1199         }
1200
1201         /**
1202          * Generate HTML for a spacer image
1203          * @return String: HTML "<img>" tag
1204          */
1205         protected function spacerArrow() {
1206                 return $this->arrow( '', codepointToUtf8( 0xa0 ) ); // non-breaking space
1207         }
1208
1209         /**
1210          * Enhanced RC ungrouped line.
1211          *
1212          * @param $rcObj RecentChange
1213          * @return String: a HTML formatted line (generated using $r)
1214          */
1215         protected function recentChangesBlockLine( $rcObj ) {
1216                 global $wgRCShowChangedSize;
1217
1218                 wfProfileIn( __METHOD__ );
1219                 $query['curid'] = $rcObj->mAttribs['rc_cur_id'];
1220
1221                 $type = $rcObj->mAttribs['rc_type'];
1222                 $logType = $rcObj->mAttribs['rc_log_type'];
1223                 $classes = array( 'mw-enhanced-rc' );
1224                 if ( $logType ) {
1225                         # Log entry
1226                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-log-'
1227                                         . $logType . '-' . $rcObj->mAttribs['rc_title'] );
1228                 } else {
1229                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-ns' .
1230                                         $rcObj->mAttribs['rc_namespace'] . '-' . $rcObj->mAttribs['rc_title'] );
1231                 }
1232                 $classes[] = $rcObj->watched && $rcObj->mAttribs['rc_timestamp'] >= $rcObj->watched
1233                         ? 'mw-changeslist-line-watched' : 'mw-changeslist-line-not-watched';
1234                 $r = Html::openElement( 'table', array( 'class' => $classes ) ) .
1235                         Html::openElement( 'tr' );
1236
1237                 $r .= '<td class="mw-enhanced-rc"><span class="mw-enhancedchanges-arrow-space"></span>';
1238                 # Flag and Timestamp
1239                 if ( $type == RC_MOVE || $type == RC_MOVE_OVER_REDIRECT ) {
1240                         $r .= $this->recentChangesFlags( array() ); // no flags, but need the placeholders
1241                 } else {
1242                         $r .= $this->recentChangesFlags( array(
1243                                 'newpage' => $type == RC_NEW,
1244                                 'minor' => $rcObj->mAttribs['rc_minor'],
1245                                 'unpatrolled' => $rcObj->unpatrolled,
1246                                 'bot' => $rcObj->mAttribs['rc_bot'],
1247                         ) );
1248                 }
1249                 $r .= '&#160;' . $rcObj->timestamp . '&#160;</td><td>';
1250                 # Article or log link
1251                 if ( $logType ) {
1252                         $logPage = new LogPage( $logType );
1253                         $logTitle = SpecialPage::getTitleFor( 'Log', $logType );
1254                         $logName = $logPage->getName()->escaped();
1255                         $r .= $this->msg( 'parentheses' )->rawParams( Linker::linkKnown( $logTitle, $logName ) )->escaped();
1256                 } else {
1257                         $this->insertArticleLink( $r, $rcObj, $rcObj->unpatrolled, $rcObj->watched );
1258                 }
1259                 # Diff and hist links
1260                 if ( $type != RC_LOG ) {
1261                         $query['action'] = 'history';
1262                         $r .= ' ' . $this->msg( 'parentheses' )->rawParams( $rcObj->difflink . $this->message['pipe-separator'] . Linker::linkKnown(
1263                                 $rcObj->getTitle(),
1264                                 $this->message['hist'],
1265                                 array(),
1266                                 $query
1267                         ) )->escaped();
1268                 }
1269                 $r .= ' <span class="mw-changeslist-separator">. .</span> ';
1270                 # Character diff
1271                 if ( $wgRCShowChangedSize ) {
1272                         $cd = $this->formatCharacterDifference( $rcObj );
1273                         if ( $cd !== '' ) {
1274                                 $r .= $cd . ' <span class="mw-changeslist-separator">. .</span> ';
1275                         }
1276                 }
1277
1278                 if ( $type == RC_LOG ) {
1279                         $r .= $this->insertLogEntry( $rcObj );
1280                 } else {
1281                         $r .= ' ' . $rcObj->userlink . $rcObj->usertalklink;
1282                         $r .= $this->insertComment( $rcObj );
1283                         $this->insertRollback( $r, $rcObj );
1284                 }
1285
1286                 # Tags
1287                 $this->insertTags( $r, $rcObj, $classes );
1288                 # Show how many people are watching this if enabled
1289                 $r .= $this->numberofWatchingusers( $rcObj->numberofWatchingusers );
1290
1291                 $r .= "</td></tr></table>\n";
1292
1293                 wfProfileOut( __METHOD__ );
1294
1295                 return $r;
1296         }
1297
1298         /**
1299          * If enhanced RC is in use, this function takes the previously cached
1300          * RC lines, arranges them, and outputs the HTML
1301          *
1302          * @return string
1303          */
1304         protected function recentChangesBlock() {
1305                 if ( count ( $this->rc_cache ) == 0 ) {
1306                         return '';
1307                 }
1308
1309                 wfProfileIn( __METHOD__ );
1310
1311                 $blockOut = '';
1312                 foreach ( $this->rc_cache as $block ) {
1313                         if ( count( $block ) < 2 ) {
1314                                 $blockOut .= $this->recentChangesBlockLine( array_shift( $block ) );
1315                         } else {
1316                                 $blockOut .= $this->recentChangesBlockGroup( $block );
1317                         }
1318                 }
1319
1320                 wfProfileOut( __METHOD__ );
1321
1322                 return '<div>' . $blockOut . '</div>';
1323         }
1324
1325         /**
1326          * Returns text for the end of RC
1327          * If enhanced RC is in use, returns pretty much all the text
1328          * @return string
1329          */
1330         public function endRecentChangesList() {
1331                 return $this->recentChangesBlock() . parent::endRecentChangesList();
1332         }
1333
1334 }