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         /** @var array Array of array of RCCacheEntry */
  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 RecentChange $baseRC
  54          * @param bool $watched
  55          *
  56          * @return string
  57          */
  58         public function recentChangesLine( &$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                         $clink = '';
  94                 // New unpatrolled pages
  95                 } elseif ( $cacheEntry->unpatrolled && $type == RC_NEW ) {
  96                         $clink = Linker::linkKnown( $cacheEntry->getTitle() );
  97                 // Log entries
  98                 } elseif ( $type == RC_LOG ) {
  99                         if ( $logType ) {
 100                                 $logtitle = SpecialPage::getTitleFor( 'Log', $logType );
 101                                 $logpage = new LogPage( $logType );
 102                                 $logname = $logpage->getName()->escaped();
 103                                 $clink = $this->msg( 'parentheses' )
 104                                         ->rawParams( Linker::linkKnown( $logtitle, $logname ) )->escaped();
 105                         } else {
 106                                 $clink = Linker::link( $cacheEntry->getTitle() );
 107                         }
 108                         $watched = false;
 109                 // Log entries (old format) and special pages
 110                 } elseif ( $cacheEntry->mAttribs['rc_namespace'] == NS_SPECIAL ) {
 111                         wfDebug( "Unexpected special page in recentchanges\n" );
 112                         $clink = '';
 113                 // Edits
 114                 } else {
 115                         $clink = Linker::linkKnown( $cacheEntry->getTitle() );
 116                 }
 117
 118                 # Don't show unusable diff links
 119                 if ( !ChangesList::userCan( $cacheEntry, Revision::DELETED_TEXT, $this->getUser() ) ) {
 120                         $showdifflinks = false;
 121                 }
 122
 123                 $time = $this->getLanguage()->userTime( $cacheEntry->mAttribs['rc_timestamp'], $this->getUser() );
 124
 125                 $cacheEntry->watched = $watched;
 126                 $cacheEntry->link = $clink;
 127                 $cacheEntry->timestamp = $time;
 128                 $cacheEntry->numberofWatchingusers = $baseRC->numberofWatchingusers;
 129
 130                 # Make "cur" and "diff" links.  Do not use link(), it is too slow if
 131                 # called too many times (50% of CPU time on RecentChanges!).
 132                 $thisOldid = $cacheEntry->mAttribs['rc_this_oldid'];
 133                 $lastOldid = $cacheEntry->mAttribs['rc_last_oldid'];
 134
 135                 $querycur = $curIdEq + array( 'diff' => '0', 'oldid' => $thisOldid );
 136                 $querydiff = $curIdEq + array( 'diff' => $thisOldid, 'oldid' => $lastOldid );
 137
 138                 if ( !$showdifflinks ) {
 139                         $curLink = $this->message['cur'];
 140                         $diffLink = $this->message['diff'];
 141                 } elseif ( in_array( $type, array( RC_NEW, RC_LOG, RC_MOVE, RC_MOVE_OVER_REDIRECT ) ) ) {
 142                         if ( $type != RC_NEW ) {
 143                                 $curLink = $this->message['cur'];
 144                         } else {
 145                                 $curUrl = htmlspecialchars( $cacheEntry->getTitle()->getLinkURL( $querycur ) );
 146                                 $curLink = "<a href=\"$curUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['cur']}</a>";
 147                         }
 148                         $diffLink = $this->message['diff'];
 149                 } else {
 150                         $diffUrl = htmlspecialchars( $cacheEntry->getTitle()->getLinkURL( $querydiff ) );
 151                         $curUrl = htmlspecialchars( $cacheEntry->getTitle()->getLinkURL( $querycur ) );
 152                         $diffLink = "<a href=\"$diffUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['diff']}</a>";
 153                         $curLink = "<a href=\"$curUrl\" tabindex=\"{$baseRC->counter}\">{$this->message['cur']}</a>";
 154                 }
 155
 156                 # Make "last" link
 157                 if ( !$showdifflinks || !$lastOldid ) {
 158                         $lastLink = $this->message['last'];
 159                 } elseif ( in_array( $type, array( RC_LOG, RC_MOVE, RC_MOVE_OVER_REDIRECT ) ) ) {
 160                         $lastLink = $this->message['last'];
 161                 } else {
 162                         $lastLink = Linker::linkKnown( $cacheEntry->getTitle(), $this->message['last'],
 163                                 array(), $curIdEq + array( 'diff' => $thisOldid, 'oldid' => $lastOldid ) );
 164                 }
 165
 166                 # Make user links
 167                 if ( $this->isDeleted( $cacheEntry, Revision::DELETED_USER ) ) {
 168                         $cacheEntry->userlink = ' <span class="history-deleted">' .
 169                                 $this->msg( 'rev-deleted-user' )->escaped() . '</span>';
 170                 } else {
 171                         $cacheEntry->userlink = Linker::userLink(
 172                                 $cacheEntry->mAttribs['rc_user'],
 173                                 $cacheEntry->mAttribs['rc_user_text']
 174                         );
 175
 176                         $cacheEntry->usertalklink = Linker::userToolLinks(
 177                                 $cacheEntry->mAttribs['rc_user'],
 178                                 $cacheEntry->mAttribs['rc_user_text']
 179                         );
 180                 }
 181
 182                 $cacheEntry->lastlink = $lastLink;
 183                 $cacheEntry->curlink = $curLink;
 184                 $cacheEntry->difflink = $diffLink;
 185
 186                 # Put accumulated information into the cache, for later display
 187                 # Page moves go on their own line
 188                 $title = $cacheEntry->getTitle();
 189                 $secureName = $title->getPrefixedDBkey();
 190
 191                 if ( $type == RC_MOVE || $type == RC_MOVE_OVER_REDIRECT ) {
 192                         # Use an @ character to prevent collision with page names
 193                         $this->rc_cache['@@' . ( $this->rcMoveIndex++ )] = array( $cacheEntry );
 194                 } else {
 195                         # Logs are grouped by type
 196                         if ( $type == RC_LOG ) {
 197                                 $secureName = SpecialPage::getTitleFor( 'Log', $logType )->getPrefixedDBkey();
 198                         }
 199                         if ( !isset( $this->rc_cache[$secureName] ) ) {
 200                                 $this->rc_cache[$secureName] = array();
 201                         }
 202
 203                         array_push( $this->rc_cache[$secureName], $cacheEntry );
 204                 }
 205
 206                 wfProfileOut( __METHOD__ );
 207
 208                 return $ret;
 209         }
 210
 211         /**
 212          * Enhanced RC group
 213          * @param RCCacheEntry[] $block
 214          * @return string
 215          */
 216         protected function recentChangesBlockGroup( $block ) {
 217                 global $wgRCShowChangedSize;
 218
 219                 wfProfileIn( __METHOD__ );
 220
 221                 # Add the namespace and title of the block as part of the class
 222                 $classes = array( 'mw-collapsible', 'mw-collapsed', 'mw-enhanced-rc' );
 223                 if ( $block[0]->mAttribs['rc_log_type'] ) {
 224                         # Log entry
 225                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-log-'
 226                                 . $block[0]->mAttribs['rc_log_type'] );
 227                 } else {
 228                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-ns'
 229                                 . $block[0]->mAttribs['rc_namespace'] . '-' . $block[0]->mAttribs['rc_title'] );
 230                 }
 231                 $classes[] = $block[0]->watched && $block[0]->mAttribs['rc_timestamp'] >= $block[0]->watched
 232                         ? 'mw-changeslist-line-watched' : 'mw-changeslist-line-not-watched';
 233                 $r = Html::openElement( 'table', array( 'class' => $classes ) ) .
 234                         Html::openElement( 'tr' );
 235
 236                 # Collate list of users
 237                 $userlinks = array();
 238                 # Other properties
 239                 $unpatrolled = false;
 240                 $isnew = false;
 241                 $allBots = true;
 242                 $allMinors = true;
 243                 $curId = $currentRevision = 0;
 244                 # Some catalyst variables...
 245                 $namehidden = true;
 246                 $allLogs = true;
 247                 $oldid = '';
 248                 foreach ( $block as $rcObj ) {
 249                         $oldid = $rcObj->mAttribs['rc_last_oldid'];
 250                         if ( $rcObj->mAttribs['rc_type'] == RC_NEW ) {
 251                                 $isnew = true;
 252                         }
 253                         // If all log actions to this page were hidden, then don't
 254                         // give the name of the affected page for this block!
 255                         if ( !$this->isDeleted( $rcObj, LogPage::DELETED_ACTION ) ) {
 256                                 $namehidden = false;
 257                         }
 258                         $u = $rcObj->userlink;
 259                         if ( !isset( $userlinks[$u] ) ) {
 260                                 $userlinks[$u] = 0;
 261                         }
 262                         if ( $rcObj->unpatrolled ) {
 263                                 $unpatrolled = true;
 264                         }
 265                         if ( $rcObj->mAttribs['rc_type'] != RC_LOG ) {
 266                                 $allLogs = false;
 267                         }
 268                         # Get the latest entry with a page_id and oldid
 269                         # since logs may not have these.
 270                         if ( !$curId && $rcObj->mAttribs['rc_cur_id'] ) {
 271                                 $curId = $rcObj->mAttribs['rc_cur_id'];
 272                         }
 273                         if ( !$currentRevision && $rcObj->mAttribs['rc_this_oldid'] ) {
 274                                 $currentRevision = $rcObj->mAttribs['rc_this_oldid'];
 275                         }
 276
 277                         if ( !$rcObj->mAttribs['rc_bot'] ) {
 278                                 $allBots = false;
 279                         }
 280                         if ( !$rcObj->mAttribs['rc_minor'] ) {
 281                                 $allMinors = false;
 282                         }
 283
 284                         $userlinks[$u]++;
 285                 }
 286
 287                 # Sort the list and convert to text
 288                 krsort( $userlinks );
 289                 asort( $userlinks );
 290                 $users = array();
 291                 foreach ( $userlinks as $userlink => $count ) {
 292                         $text = $userlink;
 293                         $text .= $this->getLanguage()->getDirMark();
 294                         if ( $count > 1 ) {
 295                                 // @todo FIXME: Hardcoded '×'. Should be a message.
 296                                 $formattedCount = $this->getLanguage()->formatNum( $count ) . '×';
 297                                 $text .= ' ' . $this->msg( 'parentheses' )->rawParams( $formattedCount )->escaped();
 298                         }
 299                         array_push( $users, $text );
 300                 }
 301
 302                 $users = ' <span class="changedby">'
 303                         . $this->msg( 'brackets' )->rawParams(
 304                                 implode( $this->message['semicolon-separator'], $users )
 305                         )->escaped() . '</span>';
 306
 307                 $tl = '<span class="mw-collapsible-toggle mw-collapsible-arrow ' .
 308                         'mw-enhancedchanges-arrow mw-enhancedchanges-arrow-space"></span>';
 309                 $r .= "<td>$tl</td>";
 310
 311                 # Main line
 312                 $r .= '<td class="mw-enhanced-rc">' . $this->recentChangesFlags( array(
 313                         'newpage' => $isnew, # show, when one have this flag
 314                         'minor' => $allMinors, # show only, when all have this flag
 315                         'unpatrolled' => $unpatrolled, # show, when one have this flag
 316                         'bot' => $allBots, # show only, when all have this flag
 317                 ) );
 318
 319                 # Timestamp
 320                 $r .= '&#160;' . $block[0]->timestamp . '&#160;</td><td>';
 321
 322                 # Article link
 323                 if ( $namehidden ) {
 324                         $r .= ' <span class="history-deleted">' .
 325                                 $this->msg( 'rev-deleted-event' )->escaped() . '</span>';
 326                 } elseif ( $allLogs ) {
 327                         $r .= $this->maybeWatchedLink( $block[0]->link, $block[0]->watched );
 328                 } else {
 329                         $this->insertArticleLink( $r, $block[0], $block[0]->unpatrolled, $block[0]->watched );
 330                 }
 331
 332                 $r .= $this->getLanguage()->getDirMark();
 333
 334                 $queryParams['curid'] = $curId;
 335
 336                 # Changes message
 337                 static $nchanges = array();
 338                 static $sinceLastVisitMsg = array();
 339
 340                 $n = count( $block );
 341                 if ( !isset( $nchanges[$n] ) ) {
 342                         $nchanges[$n] = $this->msg( 'nchanges' )->numParams( $n )->escaped();
 343                 }
 344
 345                 $sinceLast = 0;
 346                 $unvisitedOldid = null;
 347                 /** @var $rcObj RCCacheEntry */
 348                 foreach ( $block as $rcObj ) {
 349                         // Same logic as below inside main foreach
 350                         if ( $rcObj->watched && $rcObj->mAttribs['rc_timestamp'] >= $rcObj->watched ) {
 351                                 $sinceLast++;
 352                                 $unvisitedOldid = $rcObj->mAttribs['rc_last_oldid'];
 353                         }
 354                 }
 355                 if ( !isset( $sinceLastVisitMsg[$sinceLast] ) ) {
 356                         $sinceLastVisitMsg[$sinceLast] =
 357                                 $this->msg( 'enhancedrc-since-last-visit' )->numParams( $sinceLast )->escaped();
 358                 }
 359
 360                 # Total change link
 361                 $r .= ' ';
 362                 $logtext = '';
 363                 /** @var $block0 RecentChange */
 364                 $block0 = $block[0];
 365                 if ( !$allLogs ) {
 366                         if ( !ChangesList::userCan( $rcObj, Revision::DELETED_TEXT, $this->getUser() ) ) {
 367                                 $logtext .= $nchanges[$n];
 368                         } elseif ( $isnew ) {
 369                                 $logtext .= $nchanges[$n];
 370                         } else {
 371                                 $logtext .= Linker::link(
 372                                         $block0->getTitle(),
 373                                         $nchanges[$n],
 374                                         array(),
 375                                         $queryParams + array(
 376                                                 'diff' => $currentRevision,
 377                                                 'oldid' => $oldid,
 378                                         ),
 379                                         array( 'known', 'noclasses' )
 380                                 );
 381                                 if ( $sinceLast > 0 && $sinceLast < $n ) {
 382                                         $logtext .= $this->message['pipe-separator'] . Linker::link(
 383                                                 $block0->getTitle(),
 384                                                 $sinceLastVisitMsg[$sinceLast],
 385                                                 array(),
 386                                                 $queryParams + array(
 387                                                         'diff' => $currentRevision,
 388                                                         'oldid' => $unvisitedOldid,
 389                                                 ),
 390                                                 array( 'known', 'noclasses' )
 391                                         );
 392                                 }
 393                         }
 394                 }
 395
 396                 # History
 397                 if ( $allLogs ) {
 398                         // don't show history link for logs
 399                 } elseif ( $namehidden || !$block0->getTitle()->exists() ) {
 400                         $logtext .= $this->message['pipe-separator'] . $this->message['enhancedrc-history'];
 401                 } else {
 402                         $params = $queryParams;
 403                         $params['action'] = 'history';
 404
 405                         $logtext .= $this->message['pipe-separator'] .
 406                                 Linker::linkKnown(
 407                                         $block0->getTitle(),
 408                                         $this->message['enhancedrc-history'],
 409                                         array(),
 410                                         $params
 411                                 );
 412                 }
 413
 414                 if ( $logtext !== '' ) {
 415                         $r .= $this->msg( 'parentheses' )->rawParams( $logtext )->escaped();
 416                 }
 417
 418                 $r .= ' <span class="mw-changeslist-separator">. .</span> ';
 419
 420                 # Character difference (does not apply if only log items)
 421                 if ( $wgRCShowChangedSize && !$allLogs ) {
 422                         $last = 0;
 423                         $first = count( $block ) - 1;
 424                         # Some events (like logs) have an "empty" size, so we need to skip those...
 425                         while ( $last < $first && $block[$last]->mAttribs['rc_new_len'] === null ) {
 426                                 $last++;
 427                         }
 428                         while ( $first > $last && $block[$first]->mAttribs['rc_old_len'] === null ) {
 429                                 $first--;
 430                         }
 431                         # Get net change
 432                         $chardiff = $this->formatCharacterDifference( $block[$first], $block[$last] );
 433
 434                         if ( $chardiff == '' ) {
 435                                 $r .= ' ';
 436                         } else {
 437                                 $r .= ' ' . $chardiff . ' <span class="mw-changeslist-separator">. .</span> ';
 438                         }
 439                 }
 440
 441                 $r .= $users;
 442                 $r .= $this->numberofWatchingusers( $block0->numberofWatchingusers );
 443                 $r .= '</td></tr>';
 444
 445                 # Sub-entries
 446                 foreach ( $block as $rcObj ) {
 447                         # Classes to apply -- TODO implement
 448                         $classes = array();
 449                         $type = $rcObj->mAttribs['rc_type'];
 450
 451                         $trClass = $rcObj->watched && $rcObj->mAttribs['rc_timestamp'] >= $rcObj->watched
 452                                 ? ' class="mw-enhanced-watched"' : '';
 453
 454                         $r .= '<tr' . $trClass . '><td></td><td class="mw-enhanced-rc">';
 455                         $r .= $this->recentChangesFlags( array(
 456                                 'newpage' => $type == RC_NEW,
 457                                 'minor' => $rcObj->mAttribs['rc_minor'],
 458                                 'unpatrolled' => $rcObj->unpatrolled,
 459                                 'bot' => $rcObj->mAttribs['rc_bot'],
 460                         ) );
 461                         $r .= '&#160;</td><td class="mw-enhanced-rc-nested"><span class="mw-enhanced-rc-time">';
 462
 463                         $params = $queryParams;
 464
 465                         if ( $rcObj->mAttribs['rc_this_oldid'] != 0 ) {
 466                                 $params['oldid'] = $rcObj->mAttribs['rc_this_oldid'];
 467                         }
 468
 469                         # Log timestamp
 470                         if ( $type == RC_LOG ) {
 471                                 $link = $rcObj->timestamp;
 472                         # Revision link
 473                         } elseif ( !ChangesList::userCan( $rcObj, Revision::DELETED_TEXT, $this->getUser() ) ) {
 474                                 $link = '<span class="history-deleted">' . $rcObj->timestamp . '</span> ';
 475                         } else {
 476
 477                                 $link = Linker::linkKnown(
 478                                         $rcObj->getTitle(),
 479                                         $rcObj->timestamp,
 480                                         array(),
 481                                         $params
 482                                 );
 483                                 if ( $this->isDeleted( $rcObj, Revision::DELETED_TEXT ) ) {
 484                                         $link = '<span class="history-deleted">' . $link . '</span> ';
 485                                 }
 486                         }
 487                         $r .= $link . '</span>';
 488
 489                         if ( !$type == RC_LOG || $type == RC_NEW ) {
 490                                 $r .= ' ' . $this->msg( 'parentheses' )->rawParams(
 491                                         $rcObj->curlink .
 492                                                 $this->message['pipe-separator'] .
 493                                                 $rcObj->lastlink
 494                                 )->escaped();
 495                         }
 496                         $r .= ' <span class="mw-changeslist-separator">. .</span> ';
 497
 498                         # Character diff
 499                         if ( $wgRCShowChangedSize ) {
 500                                 $cd = $this->formatCharacterDifference( $rcObj );
 501                                 if ( $cd !== '' ) {
 502                                         $r .= $cd . ' <span class="mw-changeslist-separator">. .</span> ';
 503                                 }
 504                         }
 505
 506                         if ( $rcObj->mAttribs['rc_type'] == RC_LOG ) {
 507                                 $r .= $this->insertLogEntry( $rcObj );
 508                         } else {
 509                                 # User links
 510                                 $r .= $rcObj->userlink;
 511                                 $r .= $rcObj->usertalklink;
 512                                 $r .= $this->insertComment( $rcObj );
 513                         }
 514
 515                         # Rollback
 516                         $this->insertRollback( $r, $rcObj );
 517                         # Tags
 518                         $this->insertTags( $r, $rcObj, $classes );
 519
 520                         $r .= "</td></tr>\n";
 521                 }
 522                 $r .= "</table>\n";
 523
 524                 $this->rcCacheIndex++;
 525
 526                 wfProfileOut( __METHOD__ );
 527
 528                 return $r;
 529         }
 530
 531         /**
 532          * Generate HTML for an arrow or placeholder graphic
 533          * @param string $dir One of '', 'd', 'l', 'r'
 534          * @param string $alt
 535          * @param string $title
 536          * @return string HTML "<img>" tag
 537          */
 538         protected function arrow( $dir, $alt = '', $title = '' ) {
 539                 global $wgStylePath;
 540                 $encUrl = htmlspecialchars( $wgStylePath . '/common/images/Arr_' . $dir . '.png' );
 541                 $encAlt = htmlspecialchars( $alt );
 542                 $encTitle = htmlspecialchars( $title );
 543
 544                 return "<img src=\"$encUrl\" width=\"12\" height=\"12\" alt=\"$encAlt\" title=\"$encTitle\" />";
 545         }
 546
 547         /**
 548          * Generate HTML for a right- or left-facing arrow,
 549          * depending on language direction.
 550          * @return string HTML "<img>" tag
 551          */
 552         protected function sideArrow() {
 553                 $dir = $this->getLanguage()->isRTL() ? 'l' : 'r';
 554
 555                 return $this->arrow( $dir, '+', $this->msg( 'rc-enhanced-expand' )->text() );
 556         }
 557
 558         /**
 559          * Generate HTML for a down-facing arrow
 560          * depending on language direction.
 561          * @return string HTML "<img>" tag
 562          */
 563         protected function downArrow() {
 564                 return $this->arrow( 'd', '-', $this->msg( 'rc-enhanced-hide' )->text() );
 565         }
 566
 567         /**
 568          * Generate HTML for a spacer image
 569          * @return string HTML "<img>" tag
 570          */
 571         protected function spacerArrow() {
 572                 return $this->arrow( '', codepointToUtf8( 0xa0 ) ); // non-breaking space
 573         }
 574
 575         /**
 576          * Enhanced RC ungrouped line.
 577          *
 578          * @param RecentChange|RCCacheEntry $rcObj
 579          * @return string A HTML formatted line (generated using $r)
 580          */
 581         protected function recentChangesBlockLine( $rcObj ) {
 582                 global $wgRCShowChangedSize;
 583
 584                 wfProfileIn( __METHOD__ );
 585                 $query['curid'] = $rcObj->mAttribs['rc_cur_id'];
 586
 587                 $type = $rcObj->mAttribs['rc_type'];
 588                 $logType = $rcObj->mAttribs['rc_log_type'];
 589                 $classes = array( 'mw-enhanced-rc' );
 590                 if ( $logType ) {
 591                         # Log entry
 592                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-log-' . $logType );
 593                 } else {
 594                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-ns' .
 595                                 $rcObj->mAttribs['rc_namespace'] . '-' . $rcObj->mAttribs['rc_title'] );
 596                 }
 597                 $classes[] = $rcObj->watched && $rcObj->mAttribs['rc_timestamp'] >= $rcObj->watched
 598                         ? 'mw-changeslist-line-watched' : 'mw-changeslist-line-not-watched';
 599                 $r = Html::openElement( 'table', array( 'class' => $classes ) ) .
 600                         Html::openElement( 'tr' );
 601
 602                 $r .= '<td class="mw-enhanced-rc"><span class="mw-enhancedchanges-arrow-space"></span>';
 603                 # Flag and Timestamp
 604                 if ( $type == RC_MOVE || $type == RC_MOVE_OVER_REDIRECT ) {
 605                         $r .= $this->recentChangesFlags( array() ); // no flags, but need the placeholders
 606                 } else {
 607                         $r .= $this->recentChangesFlags( array(
 608                                 'newpage' => $type == RC_NEW,
 609                                 'minor' => $rcObj->mAttribs['rc_minor'],
 610                                 'unpatrolled' => $rcObj->unpatrolled,
 611                                 'bot' => $rcObj->mAttribs['rc_bot'],
 612                         ) );
 613                 }
 614                 $r .= '&#160;' . $rcObj->timestamp . '&#160;</td><td>';
 615                 # Article or log link
 616                 if ( $logType ) {
 617                         $logPage = new LogPage( $logType );
 618                         $logTitle = SpecialPage::getTitleFor( 'Log', $logType );
 619                         $logName = $logPage->getName()->escaped();
 620                         $r .= $this->msg( 'parentheses' )
 621                                 ->rawParams( Linker::linkKnown( $logTitle, $logName ) )->escaped();
 622                 } else {
 623                         $this->insertArticleLink( $r, $rcObj, $rcObj->unpatrolled, $rcObj->watched );
 624                 }
 625                 # Diff and hist links
 626                 if ( $type != RC_LOG ) {
 627                         $query['action'] = 'history';
 628                         $r .= ' ' . $this->msg( 'parentheses' )
 629                                 ->rawParams( $rcObj->difflink . $this->message['pipe-separator'] . Linker::linkKnown(
 630                                         $rcObj->getTitle(),
 631                                         $this->message['hist'],
 632                                         array(),
 633                                         $query
 634                                 ) )->escaped();
 635                 }
 636                 $r .= ' <span class="mw-changeslist-separator">. .</span> ';
 637                 # Character diff
 638                 if ( $wgRCShowChangedSize ) {
 639                         $cd = $this->formatCharacterDifference( $rcObj );
 640                         if ( $cd !== '' ) {
 641                                 $r .= $cd . ' <span class="mw-changeslist-separator">. .</span> ';
 642                         }
 643                 }
 644
 645                 if ( $type == RC_LOG ) {
 646                         $r .= $this->insertLogEntry( $rcObj );
 647                 } else {
 648                         $r .= ' ' . $rcObj->userlink . $rcObj->usertalklink;
 649                         $r .= $this->insertComment( $rcObj );
 650                         $this->insertRollback( $r, $rcObj );
 651                 }
 652
 653                 # Tags
 654                 $this->insertTags( $r, $rcObj, $classes );
 655                 # Show how many people are watching this if enabled
 656                 $r .= $this->numberofWatchingusers( $rcObj->numberofWatchingusers );
 657
 658                 $r .= "</td></tr></table>\n";
 659
 660                 wfProfileOut( __METHOD__ );
 661
 662                 return $r;
 663         }
 664
 665         /**
 666          * If enhanced RC is in use, this function takes the previously cached
 667          * RC lines, arranges them, and outputs the HTML
 668          *
 669          * @return string
 670          */
 671         protected function recentChangesBlock() {
 672                 if ( count( $this->rc_cache ) == 0 ) {
 673                         return '';
 674                 }
 675
 676                 wfProfileIn( __METHOD__ );
 677
 678                 $blockOut = '';
 679                 foreach ( $this->rc_cache as $block ) {
 680                         if ( count( $block ) < 2 ) {
 681                                 $blockOut .= $this->recentChangesBlockLine( array_shift( $block ) );
 682                         } else {
 683                                 $blockOut .= $this->recentChangesBlockGroup( $block );
 684                         }
 685                 }
 686
 687                 wfProfileOut( __METHOD__ );
 688
 689                 return '<div>' . $blockOut . '</div>';
 690         }
 691
 692         /**
 693          * Returns text for the end of RC
 694          * If enhanced RC is in use, returns pretty much all the text
 695          * @return string
 696          */
 697         public function endRecentChangesList() {
 698                 return $this->recentChangesBlock() . '</div>';
 699         }
 700 }