includes/changes/EnhancedChangesList.php

   1 <?php
   2 /**
   3  * Generates a list of changes using an Enhanced system (uses javascript).
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 class EnhancedChangesList extends ChangesList {
  24
  25         protected $rc_cache;
  26
  27         /**
  28          * Add the JavaScript file for enhanced changeslist
  29          * @return String
  30          */
  31         public function beginRecentChangesList() {
  32                 $this->rc_cache = array();
  33                 $this->rcMoveIndex = 0;
  34                 $this->rcCacheIndex = 0;
  35                 $this->lastdate = '';
  36                 $this->rclistOpen = false;
  37                 $this->getOutput()->addModuleStyles( array(
  38                         'mediawiki.special.changeslist',
  39                         'mediawiki.special.changeslist.enhanced',
  40                 ) );
  41                 $this->getOutput()->addModules( array(
  42                         'jquery.makeCollapsible',
  43                         'mediawiki.icon',
  44                         'mediawiki.special.changeslist.js',
  45                 ) );
  46
  47                 return '<div class="mw-changeslist">';
  48         }
  49
  50         /**
  51          * Format a line for enhanced recentchange (aka with javascript and block of lines).
  52          *
  53          * @param $baseRC RecentChange
  54          * @param $watched bool
  55          *
  56          * @return string
  57          */
  58         public function recentChangesLine( &$baseRC, $watched = false ) {
  59                 wfProfileIn( __METHOD__ );
  60
  61                 # If it's a new day, add the headline and flush the cache
  62                 $date = $this->getLanguage()->userDate(
  63                         $baseRC->mAttribs['rc_timestamp'],
  64                         $this->getUser()
  65                 );
  66
  67                 $ret = '';
  68
  69                 if ( $date != $this->lastdate ) {
  70                         # Process current cache
  71                         $ret = $this->recentChangesBlock();
  72                         $this->rc_cache = array();
  73                         $ret .= Xml::element( 'h4', null, $date ) . "\n";
  74                         $this->lastdate = $date;
  75                 }
  76
  77                 # Create a specialised object
  78                 $cacheEntry = RCCacheEntry::newFromParent( $baseRC );
  79
  80                 $curIdEq = array( 'curid' => $cacheEntry->mAttribs['rc_cur_id'] );
  81
  82                 # Should patrol-related stuff be shown?
  83                 $cacheEntry->unpatrolled = $this->showAsUnpatrolled( $cacheEntry );
  84
  85                 $showdifflinks = true;
  86
  87                 # Make article link
  88                 $type = $cacheEntry->mAttribs['rc_type'];
  89                 $logType = $cacheEntry->mAttribs['rc_log_type'];
  90
  91                 // Page moves, very old style, not supported anymore
  92                 if ( $type == RC_MOVE || $type == RC_MOVE_OVER_REDIRECT ) {
  93                 // New unpatrolled pages
  94                 } elseif ( $cacheEntry->unpatrolled && $type == RC_NEW ) {
  95                         $clink = Linker::linkKnown( $cacheEntry->getTitle() );
  96                 // Log entries
  97                 } elseif ( $type == RC_LOG ) {
  98                         if ( $logType ) {
  99                                 $logtitle = SpecialPage::getTitleFor( 'Log', $logType );
 100                                 $logpage = new LogPage( $logType );
 101                                 $logname = $logpage->getName()->escaped();
 102                                 $clink = $this->msg( 'parentheses' )
 103                                         ->rawParams( Linker::linkKnown( $logtitle, $logname ) )->escaped();
 104                         } else {
 105                                 $clink = Linker::link( $cacheEntry->getTitle() );
 106                         }
 107                         $watched = false;
 108                 // Log entries (old format) and special pages
 109                 } elseif ( $cacheEntry->mAttribs['rc_namespace'] == NS_SPECIAL ) {
 110                         wfDebug( "Unexpected special page in recentchanges\n" );
 111                         $clink = '';
 112                 // Edits
 113                 } else {
 114                         $clink = Linker::linkKnown( $cacheEntry->getTitle() );
 115                 }
 116
 117                 # Don't show unusable diff links
 118                 if ( !ChangesList::userCan( $cacheEntry, Revision::DELETED_TEXT, $this->getUser() ) ) {
 119                         $showdifflinks = false;
 120                 }
 121
 122                 $time = $this->getLanguage()->userTime( $cacheEntry->mAttribs['rc_timestamp'], $this->getUser() );
 123
 124                 $cacheEntry->watched = $watched;
 125                 $cacheEntry->link = $clink;
 126                 $cacheEntry->timestamp = $time;
 127                 $cacheEntry->numberofWatchingusers = $baseRC->numberofWatchingusers;
 128
 129                 # Make "cur" and "diff" links.  Do not use link(), it is too slow if
 130                 # called too many times (50% of CPU time on RecentChanges!).
 131                 $thisOldid = $cacheEntry->mAttribs['rc_this_oldid'];
 132                 $lastOldid = $cacheEntry->mAttribs['rc_last_oldid'];
 133
 134                 $querycur = $curIdEq + array( 'diff' => '0', 'oldid' => $thisOldid );
 135                 $querydiff = $curIdEq + array( 'diff' => $thisOldid, 'oldid' => $lastOldid );
 136
 137                 if ( !$showdifflinks ) {
 138                         $curLink = $this->message['cur'];
 139                         $diffLink = $this->message['diff'];
 140                 } elseif ( in_array( $type, array( RC_NEW, RC_LOG, RC_MOVE, RC_MOVE_OVER_REDIRECT ) ) ) {
 141                         if ( $type != RC_NEW ) {
 142                                 $curLink = $this->message['cur'];
 143                         } else {
 144                                 $curUrl = htmlspecialchars( $cacheEntry->getTitle()->getLinkURL( $querycur ) );
 145                                 $curLink = "<a href=\"$curUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['cur']}</a>";
 146                         }
 147                         $diffLink = $this->message['diff'];
 148                 } else {
 149                         $diffUrl = htmlspecialchars( $cacheEntry->getTitle()->getLinkURL( $querydiff ) );
 150                         $curUrl = htmlspecialchars( $cacheEntry->getTitle()->getLinkURL( $querycur ) );
 151                         $diffLink = "<a href=\"$diffUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['diff']}</a>";
 152                         $curLink = "<a href=\"$curUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['cur']}</a>";
 153                 }
 154
 155                 # Make "last" link
 156                 if ( !$showdifflinks || !$lastOldid ) {
 157                         $lastLink = $this->message['last'];
 158                 } elseif ( in_array( $type, array( RC_LOG, RC_MOVE, RC_MOVE_OVER_REDIRECT ) ) ) {
 159                         $lastLink = $this->message['last'];
 160                 } else {
 161                         $lastLink = Linker::linkKnown( $cacheEntry->getTitle(), $this->message['last'],
 162                                 array(), $curIdEq + array( 'diff' => $thisOldid, 'oldid' => $lastOldid ) );
 163                 }
 164
 165                 # Make user links
 166                 if ( $this->isDeleted( $cacheEntry, Revision::DELETED_USER ) ) {
 167                         $cacheEntry->userlink = ' <span class="history-deleted">' .
 168                                 $this->msg( 'rev-deleted-user' )->escaped() . '</span>';
 169                 } else {
 170                         $cacheEntry->userlink = Linker::userLink(
 171                                 $cacheEntry->mAttribs['rc_user'],
 172                                 $cacheEntry->mAttribs['rc_user_text']
 173                         );
 174
 175                         $cacheEntry->usertalklink = Linker::userToolLinks(
 176                                 $cacheEntry->mAttribs['rc_user'],
 177                                 $cacheEntry->mAttribs['rc_user_text']
 178                         );
 179                 }
 180
 181                 $cacheEntry->lastlink = $lastLink;
 182                 $cacheEntry->curlink = $curLink;
 183                 $cacheEntry->difflink = $diffLink;
 184
 185                 # Put accumulated information into the cache, for later display
 186                 # Page moves go on their own line
 187                 $title = $cacheEntry->getTitle();
 188                 $secureName = $title->getPrefixedDBkey();
 189
 190                 if ( $type == RC_MOVE || $type == RC_MOVE_OVER_REDIRECT ) {
 191                         # Use an @ character to prevent collision with page names
 192                         $this->rc_cache['@@' . ( $this->rcMoveIndex++ )] = array( $cacheEntry );
 193                 } else {
 194                         # Logs are grouped by type
 195                         if ( $type == RC_LOG ) {
 196                                 $secureName = SpecialPage::getTitleFor( 'Log', $logType )->getPrefixedDBkey();
 197                         }
 198                         if ( !isset( $this->rc_cache[$secureName] ) ) {
 199                                 $this->rc_cache[$secureName] = array();
 200                         }
 201
 202                         array_push( $this->rc_cache[$secureName], $cacheEntry );
 203                 }
 204
 205                 wfProfileOut( __METHOD__ );
 206
 207                 return $ret;
 208         }
 209
 210         /**
 211          * Enhanced RC group
 212          * @return string
 213          */
 214         protected function recentChangesBlockGroup( $block ) {
 215                 global $wgRCShowChangedSize;
 216
 217                 wfProfileIn( __METHOD__ );
 218
 219                 # Add the namespace and title of the block as part of the class
 220                 $classes = array( 'mw-collapsible', 'mw-collapsed', 'mw-enhanced-rc' );
 221                 if ( $block[0]->mAttribs['rc_log_type'] ) {
 222                         # Log entry
 223                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-log-'
 224                                 . $block[0]->mAttribs['rc_log_type'] . '-' . $block[0]->mAttribs['rc_title'] );
 225                 } else {
 226                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-ns'
 227                                 . $block[0]->mAttribs['rc_namespace'] . '-' . $block[0]->mAttribs['rc_title'] );
 228                 }
 229                 $classes[] = $block[0]->watched && $block[0]->mAttribs['rc_timestamp'] >= $block[0]->watched
 230                         ? 'mw-changeslist-line-watched' : 'mw-changeslist-line-not-watched';
 231                 $r = Html::openElement( 'table', array( 'class' => $classes ) ) .
 232                         Html::openElement( 'tr' );
 233
 234                 # Collate list of users
 235                 $userlinks = array();
 236                 # Other properties
 237                 $unpatrolled = false;
 238                 $isnew = false;
 239                 $allBots = true;
 240                 $allMinors = true;
 241                 $curId = $currentRevision = 0;
 242                 # Some catalyst variables...
 243                 $namehidden = true;
 244                 $allLogs = true;
 245                 foreach ( $block as $rcObj ) {
 246                         $oldid = $rcObj->mAttribs['rc_last_oldid'];
 247                         if ( $rcObj->mAttribs['rc_type'] == RC_NEW ) {
 248                                 $isnew = true;
 249                         }
 250                         // If all log actions to this page were hidden, then don't
 251                         // give the name of the affected page for this block!
 252                         if ( !$this->isDeleted( $rcObj, LogPage::DELETED_ACTION ) ) {
 253                                 $namehidden = false;
 254                         }
 255                         $u = $rcObj->userlink;
 256                         if ( !isset( $userlinks[$u] ) ) {
 257                                 $userlinks[$u] = 0;
 258                         }
 259                         if ( $rcObj->unpatrolled ) {
 260                                 $unpatrolled = true;
 261                         }
 262                         if ( $rcObj->mAttribs['rc_type'] != RC_LOG ) {
 263                                 $allLogs = false;
 264                         }
 265                         # Get the latest entry with a page_id and oldid
 266                         # since logs may not have these.
 267                         if ( !$curId && $rcObj->mAttribs['rc_cur_id'] ) {
 268                                 $curId = $rcObj->mAttribs['rc_cur_id'];
 269                         }
 270                         if ( !$currentRevision && $rcObj->mAttribs['rc_this_oldid'] ) {
 271                                 $currentRevision = $rcObj->mAttribs['rc_this_oldid'];
 272                         }
 273
 274                         if ( !$rcObj->mAttribs['rc_bot'] ) {
 275                                 $allBots = false;
 276                         }
 277                         if ( !$rcObj->mAttribs['rc_minor'] ) {
 278                                 $allMinors = false;
 279                         }
 280
 281                         $userlinks[$u]++;
 282                 }
 283
 284                 # Sort the list and convert to text
 285                 krsort( $userlinks );
 286                 asort( $userlinks );
 287                 $users = array();
 288                 foreach ( $userlinks as $userlink => $count ) {
 289                         $text = $userlink;
 290                         $text .= $this->getLanguage()->getDirMark();
 291                         if ( $count > 1 ) {
 292                                 // @todo FIXME: Hardcoded '×'. Should be a message.
 293                                 $formattedCount = $this->getLanguage()->formatNum( $count ) . '×';
 294                                 $text .= ' ' . $this->msg( 'parentheses' )->rawParams( $formattedCount )->escaped();
 295                         }
 296                         array_push( $users, $text );
 297                 }
 298
 299                 $users = ' <span class="changedby">'
 300                         . $this->msg( 'brackets' )->rawParams(
 301                                 implode( $this->message['semicolon-separator'], $users )
 302                         )->escaped() . '</span>';
 303
 304                 $tl = '<span class="mw-collapsible-toggle mw-collapsible-arrow ' .
 305                         'mw-enhancedchanges-arrow mw-enhancedchanges-arrow-space"></span>';
 306                 $r .= "<td>$tl</td>";
 307
 308                 # Main line
 309                 $r .= '<td class="mw-enhanced-rc">' . $this->recentChangesFlags( array(
 310                         'newpage' => $isnew, # show, when one have this flag
 311                         'minor' => $allMinors, # show only, when all have this flag
 312                         'unpatrolled' => $unpatrolled, # show, when one have this flag
 313                         'bot' => $allBots, # show only, when all have this flag
 314                 ) );
 315
 316                 # Timestamp
 317                 $r .= '&#160;' . $block[0]->timestamp . '&#160;</td><td>';
 318
 319                 # Article link
 320                 if ( $namehidden ) {
 321                         $r .= ' <span class="history-deleted">' .
 322                                 $this->msg( 'rev-deleted-event' )->escaped() . '</span>';
 323                 } elseif ( $allLogs ) {
 324                         $r .= $this->maybeWatchedLink( $block[0]->link, $block[0]->watched );
 325                 } else {
 326                         $this->insertArticleLink( $r, $block[0], $block[0]->unpatrolled, $block[0]->watched );
 327                 }
 328
 329                 $r .= $this->getLanguage()->getDirMark();
 330
 331                 $queryParams['curid'] = $curId;
 332
 333                 # Changes message
 334                 static $nchanges = array();
 335                 static $sinceLastVisitMsg = array();
 336
 337                 $n = count( $block );
 338                 if ( !isset( $nchanges[$n] ) ) {
 339                         $nchanges[$n] = $this->msg( 'nchanges' )->numParams( $n )->escaped();
 340                 }
 341
 342                 $sinceLast = 0;
 343                 $unvisitedOldid = null;
 344                 foreach ( $block as $rcObj ) {
 345                         // Same logic as below inside main foreach
 346                         if ( $rcObj->watched && $rcObj->mAttribs['rc_timestamp'] >= $rcObj->watched ) {
 347                                 $sinceLast++;
 348                                 $unvisitedOldid = $rcObj->mAttribs['rc_last_oldid'];
 349                         }
 350                 }
 351                 if ( !isset( $sinceLastVisitMsg[$sinceLast] ) ) {
 352                         $sinceLastVisitMsg[$sinceLast] =
 353                                 $this->msg( 'enhancedrc-since-last-visit' )->numParams( $sinceLast )->escaped();
 354                 }
 355
 356                 # Total change link
 357                 $r .= ' ';
 358                 $logtext = '';
 359                 if ( !$allLogs ) {
 360                         if ( !ChangesList::userCan( $rcObj, Revision::DELETED_TEXT, $this->getUser() ) ) {
 361                                 $logtext .= $nchanges[$n];
 362                         } elseif ( $isnew ) {
 363                                 $logtext .= $nchanges[$n];
 364                         } else {
 365                                 $logtext .= Linker::link(
 366                                         $block[0]->getTitle(),
 367                                         $nchanges[$n],
 368                                         array(),
 369                                         $queryParams + array(
 370                                                 'diff' => $currentRevision,
 371                                                 'oldid' => $oldid,
 372                                         ),
 373                                         array( 'known', 'noclasses' )
 374                                 );
 375                                 if ( $sinceLast > 0 && $sinceLast < $n ) {
 376                                         $logtext .= $this->message['pipe-separator'] . Linker::link(
 377                                                 $block[0]->getTitle(),
 378                                                 $sinceLastVisitMsg[$sinceLast],
 379                                                 array(),
 380                                                 $queryParams + array(
 381                                                         'diff' => $currentRevision,
 382                                                         'oldid' => $unvisitedOldid,
 383                                                 ),
 384                                                 array( 'known', 'noclasses' )
 385                                         );
 386                                 }
 387                         }
 388                 }
 389
 390                 # History
 391                 if ( $allLogs ) {
 392                         // don't show history link for logs
 393                 } elseif ( $namehidden || !$block[0]->getTitle()->exists() ) {
 394                         $logtext .= $this->message['pipe-separator'] . $this->message['enhancedrc-history'];
 395                 } else {
 396                         $params = $queryParams;
 397                         $params['action'] = 'history';
 398
 399                         $logtext .= $this->message['pipe-separator'] .
 400                                 Linker::linkKnown(
 401                                         $block[0]->getTitle(),
 402                                         $this->message['enhancedrc-history'],
 403                                         array(),
 404                                         $params
 405                                 );
 406                 }
 407
 408                 if ( $logtext !== '' ) {
 409                         $r .= $this->msg( 'parentheses' )->rawParams( $logtext )->escaped();
 410                 }
 411
 412                 $r .= ' <span class="mw-changeslist-separator">. .</span> ';
 413
 414                 # Character difference (does not apply if only log items)
 415                 if ( $wgRCShowChangedSize && !$allLogs ) {
 416                         $last = 0;
 417                         $first = count( $block ) - 1;
 418                         # Some events (like logs) have an "empty" size, so we need to skip those...
 419                         while ( $last < $first && $block[$last]->mAttribs['rc_new_len'] === null ) {
 420                                 $last++;
 421                         }
 422                         while ( $first > $last && $block[$first]->mAttribs['rc_old_len'] === null ) {
 423                                 $first--;
 424                         }
 425                         # Get net change
 426                         $chardiff = $this->formatCharacterDifference( $block[$first], $block[$last] );
 427
 428                         if ( $chardiff == '' ) {
 429                                 $r .= ' ';
 430                         } else {
 431                                 $r .= ' ' . $chardiff . ' <span class="mw-changeslist-separator">. .</span> ';
 432                         }
 433                 }
 434
 435                 $r .= $users;
 436                 $r .= $this->numberofWatchingusers( $block[0]->numberofWatchingusers );
 437                 $r .= '</td></tr>';
 438
 439                 # Sub-entries
 440                 foreach ( $block as $rcObj ) {
 441                         # Classes to apply -- TODO implement
 442                         $classes = array();
 443                         $type = $rcObj->mAttribs['rc_type'];
 444
 445                         $trClass = $rcObj->watched && $rcObj->mAttribs['rc_timestamp'] >= $rcObj->watched
 446                                 ? ' class="mw-enhanced-watched"' : '';
 447
 448                         $r .= '<tr' . $trClass . '><td></td><td class="mw-enhanced-rc">';
 449                         $r .= $this->recentChangesFlags( array(
 450                                 'newpage' => $type == RC_NEW,
 451                                 'minor' => $rcObj->mAttribs['rc_minor'],
 452                                 'unpatrolled' => $rcObj->unpatrolled,
 453                                 'bot' => $rcObj->mAttribs['rc_bot'],
 454                         ) );
 455                         $r .= '&#160;</td><td class="mw-enhanced-rc-nested"><span class="mw-enhanced-rc-time">';
 456
 457                         $params = $queryParams;
 458
 459                         if ( $rcObj->mAttribs['rc_this_oldid'] != 0 ) {
 460                                 $params['oldid'] = $rcObj->mAttribs['rc_this_oldid'];
 461                         }
 462
 463                         # Log timestamp
 464                         if ( $type == RC_LOG ) {
 465                                 $link = $rcObj->timestamp;
 466                         # Revision link
 467                         } elseif ( !ChangesList::userCan( $rcObj, Revision::DELETED_TEXT, $this->getUser() ) ) {
 468                                 $link = '<span class="history-deleted">' . $rcObj->timestamp . '</span> ';
 469                         } else {
 470
 471                                 $link = Linker::linkKnown(
 472                                         $rcObj->getTitle(),
 473                                         $rcObj->timestamp,
 474                                         array(),
 475                                         $params
 476                                 );
 477                                 if ( $this->isDeleted( $rcObj, Revision::DELETED_TEXT ) ) {
 478                                         $link = '<span class="history-deleted">' . $link . '</span> ';
 479                                 }
 480                         }
 481                         $r .= $link . '</span>';
 482
 483                         if ( !$type == RC_LOG || $type == RC_NEW ) {
 484                                 $r .= ' ' . $this->msg( 'parentheses' )->rawParams(
 485                                         $rcObj->curlink .
 486                                                 $this->message['pipe-separator'] .
 487                                                 $rcObj->lastlink
 488                                 )->escaped();
 489                         }
 490                         $r .= ' <span class="mw-changeslist-separator">. .</span> ';
 491
 492                         # Character diff
 493                         if ( $wgRCShowChangedSize ) {
 494                                 $cd = $this->formatCharacterDifference( $rcObj );
 495                                 if ( $cd !== '' ) {
 496                                         $r .= $cd . ' <span class="mw-changeslist-separator">. .</span> ';
 497                                 }
 498                         }
 499
 500                         if ( $rcObj->mAttribs['rc_type'] == RC_LOG ) {
 501                                 $r .= $this->insertLogEntry( $rcObj );
 502                         } else {
 503                                 # User links
 504                                 $r .= $rcObj->userlink;
 505                                 $r .= $rcObj->usertalklink;
 506                                 $r .= $this->insertComment( $rcObj );
 507                         }
 508
 509                         # Rollback
 510                         $this->insertRollback( $r, $rcObj );
 511                         # Tags
 512                         $this->insertTags( $r, $rcObj, $classes );
 513
 514                         $r .= "</td></tr>\n";
 515                 }
 516                 $r .= "</table>\n";
 517
 518                 $this->rcCacheIndex++;
 519
 520                 wfProfileOut( __METHOD__ );
 521
 522                 return $r;
 523         }
 524
 525         /**
 526          * Generate HTML for an arrow or placeholder graphic
 527          * @param string $dir one of '', 'd', 'l', 'r'
 528          * @param string $alt text
 529          * @param string $title text
 530          * @return String: HTML "<img>" tag
 531          */
 532         protected function arrow( $dir, $alt = '', $title = '' ) {
 533                 global $wgStylePath;
 534                 $encUrl = htmlspecialchars( $wgStylePath . '/common/images/Arr_' . $dir . '.png' );
 535                 $encAlt = htmlspecialchars( $alt );
 536                 $encTitle = htmlspecialchars( $title );
 537
 538                 return "<img src=\"$encUrl\" width=\"12\" height=\"12\" alt=\"$encAlt\" title=\"$encTitle\" />";
 539         }
 540
 541         /**
 542          * Generate HTML for a right- or left-facing arrow,
 543          * depending on language direction.
 544          * @return String: HTML "<img>" tag
 545          */
 546         protected function sideArrow() {
 547                 $dir = $this->getLanguage()->isRTL() ? 'l' : 'r';
 548
 549                 return $this->arrow( $dir, '+', $this->msg( 'rc-enhanced-expand' )->text() );
 550         }
 551
 552         /**
 553          * Generate HTML for a down-facing arrow
 554          * depending on language direction.
 555          * @return String: HTML "<img>" tag
 556          */
 557         protected function downArrow() {
 558                 return $this->arrow( 'd', '-', $this->msg( 'rc-enhanced-hide' )->text() );
 559         }
 560
 561         /**
 562          * Generate HTML for a spacer image
 563          * @return String: HTML "<img>" tag
 564          */
 565         protected function spacerArrow() {
 566                 return $this->arrow( '', codepointToUtf8( 0xa0 ) ); // non-breaking space
 567         }
 568
 569         /**
 570          * Enhanced RC ungrouped line.
 571          *
 572          * @param $rcObj RecentChange
 573          * @return String: a HTML formatted line (generated using $r)
 574          */
 575         protected function recentChangesBlockLine( $rcObj ) {
 576                 global $wgRCShowChangedSize;
 577
 578                 wfProfileIn( __METHOD__ );
 579                 $query['curid'] = $rcObj->mAttribs['rc_cur_id'];
 580
 581                 $type = $rcObj->mAttribs['rc_type'];
 582                 $logType = $rcObj->mAttribs['rc_log_type'];
 583                 $classes = array( 'mw-enhanced-rc' );
 584                 if ( $logType ) {
 585                         # Log entry
 586                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-log-'
 587                                 . $logType . '-' . $rcObj->mAttribs['rc_title'] );
 588                 } else {
 589                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-ns' .
 590                                 $rcObj->mAttribs['rc_namespace'] . '-' . $rcObj->mAttribs['rc_title'] );
 591                 }
 592                 $classes[] = $rcObj->watched && $rcObj->mAttribs['rc_timestamp'] >= $rcObj->watched
 593                         ? 'mw-changeslist-line-watched' : 'mw-changeslist-line-not-watched';
 594                 $r = Html::openElement( 'table', array( 'class' => $classes ) ) .
 595                         Html::openElement( 'tr' );
 596
 597                 $r .= '<td class="mw-enhanced-rc"><span class="mw-enhancedchanges-arrow-space"></span>';
 598                 # Flag and Timestamp
 599                 if ( $type == RC_MOVE || $type == RC_MOVE_OVER_REDIRECT ) {
 600                         $r .= $this->recentChangesFlags( array() ); // no flags, but need the placeholders
 601                 } else {
 602                         $r .= $this->recentChangesFlags( array(
 603                                 'newpage' => $type == RC_NEW,
 604                                 'minor' => $rcObj->mAttribs['rc_minor'],
 605                                 'unpatrolled' => $rcObj->unpatrolled,
 606                                 'bot' => $rcObj->mAttribs['rc_bot'],
 607                         ) );
 608                 }
 609                 $r .= '&#160;' . $rcObj->timestamp . '&#160;</td><td>';
 610                 # Article or log link
 611                 if ( $logType ) {
 612                         $logPage = new LogPage( $logType );
 613                         $logTitle = SpecialPage::getTitleFor( 'Log', $logType );
 614                         $logName = $logPage->getName()->escaped();
 615                         $r .= $this->msg( 'parentheses' )
 616                                 ->rawParams( Linker::linkKnown( $logTitle, $logName ) )->escaped();
 617                 } else {
 618                         $this->insertArticleLink( $r, $rcObj, $rcObj->unpatrolled, $rcObj->watched );
 619                 }
 620                 # Diff and hist links
 621                 if ( $type != RC_LOG ) {
 622                         $query['action'] = 'history';
 623                         $r .= ' ' . $this->msg( 'parentheses' )
 624                                 ->rawParams( $rcObj->difflink . $this->message['pipe-separator'] . Linker::linkKnown(
 625                                         $rcObj->getTitle(),
 626                                         $this->message['hist'],
 627                                         array(),
 628                                         $query
 629                                 ) )->escaped();
 630                 }
 631                 $r .= ' <span class="mw-changeslist-separator">. .</span> ';
 632                 # Character diff
 633                 if ( $wgRCShowChangedSize ) {
 634                         $cd = $this->formatCharacterDifference( $rcObj );
 635                         if ( $cd !== '' ) {
 636                                 $r .= $cd . ' <span class="mw-changeslist-separator">. .</span> ';
 637                         }
 638                 }
 639
 640                 if ( $type == RC_LOG ) {
 641                         $r .= $this->insertLogEntry( $rcObj );
 642                 } else {
 643                         $r .= ' ' . $rcObj->userlink . $rcObj->usertalklink;
 644                         $r .= $this->insertComment( $rcObj );
 645                         $this->insertRollback( $r, $rcObj );
 646                 }
 647
 648                 # Tags
 649                 $this->insertTags( $r, $rcObj, $classes );
 650                 # Show how many people are watching this if enabled
 651                 $r .= $this->numberofWatchingusers( $rcObj->numberofWatchingusers );
 652
 653                 $r .= "</td></tr></table>\n";
 654
 655                 wfProfileOut( __METHOD__ );
 656
 657                 return $r;
 658         }
 659
 660         /**
 661          * If enhanced RC is in use, this function takes the previously cached
 662          * RC lines, arranges them, and outputs the HTML
 663          *
 664          * @return string
 665          */
 666         protected function recentChangesBlock() {
 667                 if ( count( $this->rc_cache ) == 0 ) {
 668                         return '';
 669                 }
 670
 671                 wfProfileIn( __METHOD__ );
 672
 673                 $blockOut = '';
 674                 foreach ( $this->rc_cache as $block ) {
 675                         if ( count( $block ) < 2 ) {
 676                                 $blockOut .= $this->recentChangesBlockLine( array_shift( $block ) );
 677                         } else {
 678                                 $blockOut .= $this->recentChangesBlockGroup( $block );
 679                         }
 680                 }
 681
 682                 wfProfileOut( __METHOD__ );
 683
 684                 return '<div>' . $blockOut . '</div>';
 685         }
 686
 687         /**
 688          * Returns text for the end of RC
 689          * If enhanced RC is in use, returns pretty much all the text
 690          * @return string
 691          */
 692         public function endRecentChangesList() {
 693                 return $this->recentChangesBlock() . '</div>';
 694         }
 695 }