includes/changes/ChangesList.php

   1 <?php
   2 /**
   3  * Base class for all changes lists.
   4  *
   5  * The class is used for formatting recent changes, related changes and watchlist.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  20  * http://www.gnu.org/copyleft/gpl.html
  21  *
  22  * @file
  23  */
  24 use MediaWiki\Linker\LinkRenderer;
  25 use MediaWiki\MediaWikiServices;
  26 use Wikimedia\Rdbms\ResultWrapper;
  27
  28 class ChangesList extends ContextSource {
  29         const CSS_CLASS_PREFIX = 'mw-changeslist-';
  30
  31         /**
  32          * @var Skin
  33          */
  34         public $skin;
  35
  36         protected $watchlist = false;
  37         protected $lastdate;
  38         protected $message;
  39         protected $rc_cache;
  40         protected $rcCacheIndex;
  41         protected $rclistOpen;
  42         protected $rcMoveIndex;
  43
  44         /** @var callable */
  45         protected $changeLinePrefixer;
  46
  47         /** @var BagOStuff */
  48         protected $watchMsgCache;
  49
  50         /**
  51          * @var LinkRenderer
  52          */
  53         protected $linkRenderer;
  54
  55         /**
  56          * @var array
  57          */
  58         protected $filterGroups;
  59
  60         /**
  61          * Changeslist constructor
  62          *
  63          * @param Skin|IContextSource $obj
  64          * @param array $filterGroups Array of ChangesListFilterGroup objects (currently optional)
  65          */
  66         public function __construct( $obj, array $filterGroups = [] ) {
  67                 if ( $obj instanceof IContextSource ) {
  68                         $this->setContext( $obj );
  69                         $this->skin = $obj->getSkin();
  70                 } else {
  71                         $this->setContext( $obj->getContext() );
  72                         $this->skin = $obj;
  73                 }
  74                 $this->preCacheMessages();
  75                 $this->watchMsgCache = new HashBagOStuff( [ 'maxKeys' => 50 ] );
  76                 $this->linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
  77                 $this->filterGroups = $filterGroups;
  78         }
  79
  80         /**
  81          * Fetch an appropriate changes list class for the specified context
  82          * Some users might want to use an enhanced list format, for instance
  83          *
  84          * @param IContextSource $context
  85          * @param array $groups Array of ChangesListFilterGroup objects (currently optional)
  86          * @return ChangesList
  87          */
  88         public static function newFromContext( IContextSource $context, array $groups = [] ) {
  89                 $user = $context->getUser();
  90                 $sk = $context->getSkin();
  91                 $list = null;
  92                 if ( Hooks::run( 'FetchChangesList', [ $user, &$sk, &$list ] ) ) {
  93                         $new = $context->getRequest()->getBool( 'enhanced', $user->getOption( 'usenewrc' ) );
  94
  95                         return $new ?
  96                                 new EnhancedChangesList( $context, $groups ) :
  97                                 new OldChangesList( $context, $groups );
  98                 } else {
  99                         return $list;
 100                 }
 101         }
 102
 103         /**
 104          * Format a line
 105          *
 106          * @since 1.27
 107          *
 108          * @param RecentChange &$rc Passed by reference
 109          * @param bool $watched (default false)
 110          * @param int $linenumber (default null)
 111          *
 112          * @return string|bool
 113          */
 114         public function recentChangesLine( &$rc, $watched = false, $linenumber = null ) {
 115                 throw new RuntimeException( 'recentChangesLine should be implemented' );
 116         }
 117
 118         /**
 119          * Sets the list to use a "<li class='watchlist-(namespace)-(page)'>" tag
 120          * @param bool $value
 121          */
 122         public function setWatchlistDivs( $value = true ) {
 123                 $this->watchlist = $value;
 124         }
 125
 126         /**
 127          * @return bool True when setWatchlistDivs has been called
 128          * @since 1.23
 129          */
 130         public function isWatchlist() {
 131                 return (bool)$this->watchlist;
 132         }
 133
 134         /**
 135          * As we use the same small set of messages in various methods and that
 136          * they are called often, we call them once and save them in $this->message
 137          */
 138         private function preCacheMessages() {
 139                 if ( !isset( $this->message ) ) {
 140                         foreach ( [
 141                                 'cur', 'diff', 'hist', 'enhancedrc-history', 'last', 'blocklink', 'history',
 142                                 'semicolon-separator', 'pipe-separator' ] as $msg
 143                         ) {
 144                                 $this->message[$msg] = $this->msg( $msg )->escaped();
 145                         }
 146                 }
 147         }
 148
 149         /**
 150          * Returns the appropriate flags for new page, minor change and patrolling
 151          * @param array $flags Associative array of 'flag' => Bool
 152          * @param string $nothing To use for empty space
 153          * @return string
 154          */
 155         public function recentChangesFlags( $flags, $nothing = '&#160;' ) {
 156                 $f = '';
 157                 foreach ( array_keys( $this->getConfig()->get( 'RecentChangesFlags' ) ) as $flag ) {
 158                         $f .= isset( $flags[$flag] ) && $flags[$flag]
 159                                 ? self::flag( $flag, $this->getContext() )
 160                                 : $nothing;
 161                 }
 162
 163                 return $f;
 164         }
 165
 166         /**
 167          * Get an array of default HTML class attributes for the change.
 168          *
 169          * @param RecentChange|RCCacheEntry $rc
 170          * @param string|bool $watched Optionally timestamp for adding watched class
 171          *
 172          * @return array of classes
 173          */
 174         protected function getHTMLClasses( $rc, $watched ) {
 175                 $classes = [ self::CSS_CLASS_PREFIX . 'line' ];
 176                 $logType = $rc->mAttribs['rc_log_type'];
 177
 178                 if ( $logType ) {
 179                         $classes[] = self::CSS_CLASS_PREFIX . 'log';
 180                         $classes[] = Sanitizer::escapeClass( self::CSS_CLASS_PREFIX . 'log-' . $logType );
 181                 } else {
 182                         $classes[] = self::CSS_CLASS_PREFIX . 'edit';
 183                         $classes[] = Sanitizer::escapeClass( self::CSS_CLASS_PREFIX . 'ns' .
 184                                 $rc->mAttribs['rc_namespace'] . '-' . $rc->mAttribs['rc_title'] );
 185                 }
 186                 $classes[] = Sanitizer::escapeClass( self::CSS_CLASS_PREFIX . 'ns-' .
 187                         $rc->mAttribs['rc_namespace'] );
 188
 189                 // Indicate watched status on the line to allow for more
 190                 // comprehensive styling.
 191                 $classes[] = $watched && $rc->mAttribs['rc_timestamp'] >= $watched
 192                         ? self::CSS_CLASS_PREFIX . 'line-watched'
 193                         : self::CSS_CLASS_PREFIX . 'line-not-watched';
 194
 195                 $classes = array_merge( $classes, $this->getHTMLClassesForFilters( $rc ) );
 196
 197                 return $classes;
 198         }
 199
 200         /**
 201          * Get an array of CSS classes attributed to filters for this row
 202          *
 203          * @param RecentChange $rc
 204          * @return array Array of CSS classes
 205          */
 206         protected function getHTMLClassesForFilters( $rc ) {
 207                 $classes = [];
 208
 209                 if ( $this->filterGroups !== null ) {
 210                         foreach ( $this->filterGroups as $filterGroup ) {
 211                                 foreach ( $filterGroup->getFilters() as $filter ) {
 212                                         $filter->applyCssClassIfNeeded( $this, $rc, $classes );
 213                                 }
 214                         }
 215                 }
 216
 217                 return $classes;
 218         }
 219
 220         /**
 221          * Make an "<abbr>" element for a given change flag. The flag indicating a new page, minor edit,
 222          * bot edit, or unpatrolled edit. In English it typically contains "N", "m", "b", or "!".
 223          *
 224          * @param string $flag One key of $wgRecentChangesFlags
 225          * @param IContextSource $context
 226          * @return string HTML
 227          */
 228         public static function flag( $flag, IContextSource $context = null ) {
 229                 static $map = [ 'minoredit' => 'minor', 'botedit' => 'bot' ];
 230                 static $flagInfos = null;
 231
 232                 if ( is_null( $flagInfos ) ) {
 233                         global $wgRecentChangesFlags;
 234                         $flagInfos = [];
 235                         foreach ( $wgRecentChangesFlags as $key => $value ) {
 236                                 $flagInfos[$key]['letter'] = $value['letter'];
 237                                 $flagInfos[$key]['title'] = $value['title'];
 238                                 // Allow customized class name, fall back to flag name
 239                                 $flagInfos[$key]['class'] = isset( $value['class'] ) ? $value['class'] : $key;
 240                         }
 241                 }
 242
 243                 $context = $context ?: RequestContext::getMain();
 244
 245                 // Inconsistent naming, kepted for b/c
 246                 if ( isset( $map[$flag] ) ) {
 247                         $flag = $map[$flag];
 248                 }
 249
 250                 $info = $flagInfos[$flag];
 251                 return Html::element( 'abbr', [
 252                         'class' => $info['class'],
 253                         'title' => wfMessage( $info['title'] )->setContext( $context )->text(),
 254                 ], wfMessage( $info['letter'] )->setContext( $context )->text() );
 255         }
 256
 257         /**
 258          * Returns text for the start of the tabular part of RC
 259          * @return string
 260          */
 261         public function beginRecentChangesList() {
 262                 $this->rc_cache = [];
 263                 $this->rcMoveIndex = 0;
 264                 $this->rcCacheIndex = 0;
 265                 $this->lastdate = '';
 266                 $this->rclistOpen = false;
 267                 $this->getOutput()->addModuleStyles( 'mediawiki.special.changeslist' );
 268
 269                 return '<div class="mw-changeslist">';
 270         }
 271
 272         /**
 273          * @param ResultWrapper|array $rows
 274          */
 275         public function initChangesListRows( $rows ) {
 276                 Hooks::run( 'ChangesListInitRows', [ $this, $rows ] );
 277         }
 278
 279         /**
 280          * Show formatted char difference
 281          *
 282          * Needs the css module 'mediawiki.special.changeslist' to style output
 283          *
 284          * @param int $old Number of bytes
 285          * @param int $new Number of bytes
 286          * @param IContextSource $context
 287          * @return string
 288          */
 289         public static function showCharacterDifference( $old, $new, IContextSource $context = null ) {
 290                 if ( !$context ) {
 291                         $context = RequestContext::getMain();
 292                 }
 293
 294                 $new = (int)$new;
 295                 $old = (int)$old;
 296                 $szdiff = $new - $old;
 297
 298                 $lang = $context->getLanguage();
 299                 $config = $context->getConfig();
 300                 $code = $lang->getCode();
 301                 static $fastCharDiff = [];
 302                 if ( !isset( $fastCharDiff[$code] ) ) {
 303                         $fastCharDiff[$code] = $config->get( 'MiserMode' )
 304                                 || $context->msg( 'rc-change-size' )->plain() === '$1';
 305                 }
 306
 307                 $formattedSize = $lang->formatNum( $szdiff );
 308
 309                 if ( !$fastCharDiff[$code] ) {
 310                         $formattedSize = $context->msg( 'rc-change-size', $formattedSize )->text();
 311                 }
 312
 313                 if ( abs( $szdiff ) > abs( $config->get( 'RCChangedSizeThreshold' ) ) ) {
 314                         $tag = 'strong';
 315                 } else {
 316                         $tag = 'span';
 317                 }
 318
 319                 if ( $szdiff === 0 ) {
 320                         $formattedSizeClass = 'mw-plusminus-null';
 321                 } elseif ( $szdiff > 0 ) {
 322                         $formattedSize = '+' . $formattedSize;
 323                         $formattedSizeClass = 'mw-plusminus-pos';
 324                 } else {
 325                         $formattedSizeClass = 'mw-plusminus-neg';
 326                 }
 327
 328                 $formattedTotalSize = $context->msg( 'rc-change-size-new' )->numParams( $new )->text();
 329
 330                 return Html::element( $tag,
 331                         [ 'dir' => 'ltr', 'class' => $formattedSizeClass, 'title' => $formattedTotalSize ],
 332                         $context->msg( 'parentheses', $formattedSize )->plain() ) . $lang->getDirMark();
 333         }
 334
 335         /**
 336          * Format the character difference of one or several changes.
 337          *
 338          * @param RecentChange $old
 339          * @param RecentChange $new Last change to use, if not provided, $old will be used
 340          * @return string HTML fragment
 341          */
 342         public function formatCharacterDifference( RecentChange $old, RecentChange $new = null ) {
 343                 $oldlen = $old->mAttribs['rc_old_len'];
 344
 345                 if ( $new ) {
 346                         $newlen = $new->mAttribs['rc_new_len'];
 347                 } else {
 348                         $newlen = $old->mAttribs['rc_new_len'];
 349                 }
 350
 351                 if ( $oldlen === null || $newlen === null ) {
 352                         return '';
 353                 }
 354
 355                 return self::showCharacterDifference( $oldlen, $newlen, $this->getContext() );
 356         }
 357
 358         /**
 359          * Returns text for the end of RC
 360          * @return string
 361          */
 362         public function endRecentChangesList() {
 363                 $out = $this->rclistOpen ? "</ul>\n" : '';
 364                 $out .= '</div>';
 365
 366                 return $out;
 367         }
 368
 369         /**
 370          * @param string &$s HTML to update
 371          * @param mixed $rc_timestamp
 372          */
 373         public function insertDateHeader( &$s, $rc_timestamp ) {
 374                 # Make date header if necessary
 375                 $date = $this->getLanguage()->userDate( $rc_timestamp, $this->getUser() );
 376                 if ( $date != $this->lastdate ) {
 377                         if ( $this->lastdate != '' ) {
 378                                 $s .= "</ul>\n";
 379                         }
 380                         $s .= Xml::element( 'h4', null, $date ) . "\n<ul class=\"special\">";
 381                         $this->lastdate = $date;
 382                         $this->rclistOpen = true;
 383                 }
 384         }
 385
 386         /**
 387          * @param string &$s HTML to update
 388          * @param Title $title
 389          * @param string $logtype
 390          */
 391         public function insertLog( &$s, $title, $logtype ) {
 392                 $page = new LogPage( $logtype );
 393                 $logname = $page->getName()->setContext( $this->getContext() )->text();
 394                 $s .= $this->msg( 'parentheses' )->rawParams(
 395                         $this->linkRenderer->makeKnownLink( $title, $logname )
 396                 )->escaped();
 397         }
 398
 399         /**
 400          * @param string &$s HTML to update
 401          * @param RecentChange &$rc
 402          * @param bool|null $unpatrolled Unused variable, since 1.27.
 403          */
 404         public function insertDiffHist( &$s, &$rc, $unpatrolled = null ) {
 405                 # Diff link
 406                 if (
 407                         $rc->mAttribs['rc_type'] == RC_NEW ||
 408                         $rc->mAttribs['rc_type'] == RC_LOG ||
 409                         $rc->mAttribs['rc_type'] == RC_CATEGORIZE
 410                 ) {
 411                         $diffLink = $this->message['diff'];
 412                 } elseif ( !self::userCan( $rc, Revision::DELETED_TEXT, $this->getUser() ) ) {
 413                         $diffLink = $this->message['diff'];
 414                 } else {
 415                         $query = [
 416                                 'curid' => $rc->mAttribs['rc_cur_id'],
 417                                 'diff' => $rc->mAttribs['rc_this_oldid'],
 418                                 'oldid' => $rc->mAttribs['rc_last_oldid']
 419                         ];
 420
 421                         $diffLink = $this->linkRenderer->makeKnownLink(
 422                                 $rc->getTitle(),
 423                                 new HtmlArmor( $this->message['diff'] ),
 424                                 [ 'class' => 'mw-changeslist-diff' ],
 425                                 $query
 426                         );
 427                 }
 428                 if ( $rc->mAttribs['rc_type'] == RC_CATEGORIZE ) {
 429                         $diffhist = $diffLink . $this->message['pipe-separator'] . $this->message['hist'];
 430                 } else {
 431                         $diffhist = $diffLink . $this->message['pipe-separator'];
 432                         # History link
 433                         $diffhist .= $this->linkRenderer->makeKnownLink(
 434                                 $rc->getTitle(),
 435                                 new HtmlArmor( $this->message['hist'] ),
 436                                 [ 'class' => 'mw-changeslist-history' ],
 437                                 [
 438                                         'curid' => $rc->mAttribs['rc_cur_id'],
 439                                         'action' => 'history'
 440                                 ]
 441                         );
 442                 }
 443
 444                 // @todo FIXME: Hard coded ". .". Is there a message for this? Should there be?
 445                 $s .= $this->msg( 'parentheses' )->rawParams( $diffhist )->escaped() .
 446                         ' <span class="mw-changeslist-separator">. .</span> ';
 447         }
 448
 449         /**
 450          * @param string &$s Article link will be appended to this string, in place.
 451          * @param RecentChange $rc
 452          * @param bool $unpatrolled
 453          * @param bool $watched
 454          * @deprecated since 1.27, use getArticleLink instead.
 455          */
 456         public function insertArticleLink( &$s, RecentChange $rc, $unpatrolled, $watched ) {
 457                 $s .= $this->getArticleLink( $rc, $unpatrolled, $watched );
 458         }
 459
 460         /**
 461          * @param RecentChange &$rc
 462          * @param bool $unpatrolled
 463          * @param bool $watched
 464          * @return string HTML
 465          * @since 1.26
 466          */
 467         public function getArticleLink( &$rc, $unpatrolled, $watched ) {
 468                 $params = [];
 469                 if ( $rc->getTitle()->isRedirect() ) {
 470                         $params = [ 'redirect' => 'no' ];
 471                 }
 472
 473                 $articlelink = $this->linkRenderer->makeLink(
 474                         $rc->getTitle(),
 475                         null,
 476                         [ 'class' => 'mw-changeslist-title' ],
 477                         $params
 478                 );
 479                 if ( $this->isDeleted( $rc, Revision::DELETED_TEXT ) ) {
 480                         $articlelink = '<span class="history-deleted">' . $articlelink . '</span>';
 481                 }
 482                 # To allow for boldening pages watched by this user
 483                 $articlelink = "<span class=\"mw-title\">{$articlelink}</span>";
 484                 # RTL/LTR marker
 485                 $articlelink .= $this->getLanguage()->getDirMark();
 486
 487                 # TODO: Deprecate the $s argument, it seems happily unused.
 488                 $s = '';
 489                 # Avoid PHP 7.1 warning from passing $this by reference
 490                 $changesList = $this;
 491                 Hooks::run( 'ChangesListInsertArticleLink',
 492                         [ &$changesList, &$articlelink, &$s, &$rc, $unpatrolled, $watched ] );
 493
 494                 return "{$s} {$articlelink}";
 495         }
 496
 497         /**
 498          * Get the timestamp from $rc formatted with current user's settings
 499          * and a separator
 500          *
 501          * @param RecentChange $rc
 502          * @return string HTML fragment
 503          */
 504         public function getTimestamp( $rc ) {
 505                 // @todo FIXME: Hard coded ". .". Is there a message for this? Should there be?
 506                 return $this->message['semicolon-separator'] . '<span class="mw-changeslist-date">' .
 507                         $this->getLanguage()->userTime(
 508                                 $rc->mAttribs['rc_timestamp'],
 509                                 $this->getUser()
 510                         ) . '</span> <span class="mw-changeslist-separator">. .</span> ';
 511         }
 512
 513         /**
 514          * Insert time timestamp string from $rc into $s
 515          *
 516          * @param string &$s HTML to update
 517          * @param RecentChange $rc
 518          */
 519         public function insertTimestamp( &$s, $rc ) {
 520                 $s .= $this->getTimestamp( $rc );
 521         }
 522
 523         /**
 524          * Insert links to user page, user talk page and eventually a blocking link
 525          *
 526          * @param string &$s HTML to update
 527          * @param RecentChange &$rc
 528          */
 529         public function insertUserRelatedLinks( &$s, &$rc ) {
 530                 if ( $this->isDeleted( $rc, Revision::DELETED_USER ) ) {
 531                         $s .= ' <span class="history-deleted">' .
 532                                 $this->msg( 'rev-deleted-user' )->escaped() . '</span>';
 533                 } else {
 534                         $s .= $this->getLanguage()->getDirMark() . Linker::userLink( $rc->mAttribs['rc_user'],
 535                                 $rc->mAttribs['rc_user_text'] );
 536                         $s .= Linker::userToolLinks( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 537                 }
 538         }
 539
 540         /**
 541          * Insert a formatted action
 542          *
 543          * @param RecentChange $rc
 544          * @return string
 545          */
 546         public function insertLogEntry( $rc ) {
 547                 $formatter = LogFormatter::newFromRow( $rc->mAttribs );
 548                 $formatter->setContext( $this->getContext() );
 549                 $formatter->setShowUserToolLinks( true );
 550                 $mark = $this->getLanguage()->getDirMark();
 551
 552                 return $formatter->getActionText() . " $mark" . $formatter->getComment();
 553         }
 554
 555         /**
 556          * Insert a formatted comment
 557          * @param RecentChange $rc
 558          * @return string
 559          */
 560         public function insertComment( $rc ) {
 561                 if ( $this->isDeleted( $rc, Revision::DELETED_COMMENT ) ) {
 562                         return ' <span class="history-deleted">' .
 563                                 $this->msg( 'rev-deleted-comment' )->escaped() . '</span>';
 564                 } else {
 565                         return Linker::commentBlock( $rc->mAttribs['rc_comment'], $rc->getTitle() );
 566                 }
 567         }
 568
 569         /**
 570          * Returns the string which indicates the number of watching users
 571          * @param int $count Number of user watching a page
 572          * @return string
 573          */
 574         protected function numberofWatchingusers( $count ) {
 575                 if ( $count <= 0 ) {
 576                         return '';
 577                 }
 578                 $cache = $this->watchMsgCache;
 579                 return $cache->getWithSetCallback( $count, $cache::TTL_INDEFINITE,
 580                         function () use ( $count ) {
 581                                 return $this->msg( 'number_of_watching_users_RCview' )
 582                                         ->numParams( $count )->escaped();
 583                         }
 584                 );
 585         }
 586
 587         /**
 588          * Determine if said field of a revision is hidden
 589          * @param RCCacheEntry|RecentChange $rc
 590          * @param int $field One of DELETED_* bitfield constants
 591          * @return bool
 592          */
 593         public static function isDeleted( $rc, $field ) {
 594                 return ( $rc->mAttribs['rc_deleted'] & $field ) == $field;
 595         }
 596
 597         /**
 598          * Determine if the current user is allowed to view a particular
 599          * field of this revision, if it's marked as deleted.
 600          * @param RCCacheEntry|RecentChange $rc
 601          * @param int $field
 602          * @param User $user User object to check, or null to use $wgUser
 603          * @return bool
 604          */
 605         public static function userCan( $rc, $field, User $user = null ) {
 606                 if ( $rc->mAttribs['rc_type'] == RC_LOG ) {
 607                         return LogEventsList::userCanBitfield( $rc->mAttribs['rc_deleted'], $field, $user );
 608                 } else {
 609                         return Revision::userCanBitfield( $rc->mAttribs['rc_deleted'], $field, $user );
 610                 }
 611         }
 612
 613         /**
 614          * @param string $link
 615          * @param bool $watched
 616          * @return string
 617          */
 618         protected function maybeWatchedLink( $link, $watched = false ) {
 619                 if ( $watched ) {
 620                         return '<strong class="mw-watched">' . $link . '</strong>';
 621                 } else {
 622                         return '<span class="mw-rc-unwatched">' . $link . '</span>';
 623                 }
 624         }
 625
 626         /** Inserts a rollback link
 627          *
 628          * @param string &$s
 629          * @param RecentChange &$rc
 630          */
 631         public function insertRollback( &$s, &$rc ) {
 632                 if ( $rc->mAttribs['rc_type'] == RC_EDIT
 633                         && $rc->mAttribs['rc_this_oldid']
 634                         && $rc->mAttribs['rc_cur_id']
 635                 ) {
 636                         $page = $rc->getTitle();
 637                         /** Check for rollback and edit permissions, disallow special pages, and only
 638                          * show a link on the top-most revision */
 639                         if ( $this->getUser()->isAllowed( 'rollback' )
 640                                 && $rc->mAttribs['page_latest'] == $rc->mAttribs['rc_this_oldid']
 641                         ) {
 642                                 $rev = new Revision( [
 643                                         'title' => $page,
 644                                         'id' => $rc->mAttribs['rc_this_oldid'],
 645                                         'user' => $rc->mAttribs['rc_user'],
 646                                         'user_text' => $rc->mAttribs['rc_user_text'],
 647                                         'deleted' => $rc->mAttribs['rc_deleted']
 648                                 ] );
 649                                 $s .= ' ' . Linker::generateRollback( $rev, $this->getContext() );
 650                         }
 651                 }
 652         }
 653
 654         /**
 655          * @param RecentChange $rc
 656          * @return string
 657          * @since 1.26
 658          */
 659         public function getRollback( RecentChange $rc ) {
 660                 $s = '';
 661                 $this->insertRollback( $s, $rc );
 662                 return $s;
 663         }
 664
 665         /**
 666          * @param string &$s
 667          * @param RecentChange &$rc
 668          * @param array &$classes
 669          */
 670         public function insertTags( &$s, &$rc, &$classes ) {
 671                 if ( empty( $rc->mAttribs['ts_tags'] ) ) {
 672                         return;
 673                 }
 674
 675                 list( $tagSummary, $newClasses ) = ChangeTags::formatSummaryRow(
 676                         $rc->mAttribs['ts_tags'],
 677                         'changeslist',
 678                         $this->getContext()
 679                 );
 680                 $classes = array_merge( $classes, $newClasses );
 681                 $s .= ' ' . $tagSummary;
 682         }
 683
 684         /**
 685          * @param RecentChange $rc
 686          * @param array &$classes
 687          * @return string
 688          * @since 1.26
 689          */
 690         public function getTags( RecentChange $rc, array &$classes ) {
 691                 $s = '';
 692                 $this->insertTags( $s, $rc, $classes );
 693                 return $s;
 694         }
 695
 696         public function insertExtra( &$s, &$rc, &$classes ) {
 697                 // Empty, used for subclasses to add anything special.
 698         }
 699
 700         protected function showAsUnpatrolled( RecentChange $rc ) {
 701                 return self::isUnpatrolled( $rc, $this->getUser() );
 702         }
 703
 704         /**
 705          * @param object|RecentChange $rc Database row from recentchanges or a RecentChange object
 706          * @param User $user
 707          * @return bool
 708          */
 709         public static function isUnpatrolled( $rc, User $user ) {
 710                 if ( $rc instanceof RecentChange ) {
 711                         $isPatrolled = $rc->mAttribs['rc_patrolled'];
 712                         $rcType = $rc->mAttribs['rc_type'];
 713                         $rcLogType = $rc->mAttribs['rc_log_type'];
 714                 } else {
 715                         $isPatrolled = $rc->rc_patrolled;
 716                         $rcType = $rc->rc_type;
 717                         $rcLogType = $rc->rc_log_type;
 718                 }
 719
 720                 if ( !$isPatrolled ) {
 721                         if ( $user->useRCPatrol() ) {
 722                                 return true;
 723                         }
 724                         if ( $user->useNPPatrol() && $rcType == RC_NEW ) {
 725                                 return true;
 726                         }
 727                         if ( $user->useFilePatrol() && $rcLogType == 'upload' ) {
 728                                 return true;
 729                         }
 730                 }
 731
 732                 return false;
 733         }
 734
 735         /**
 736          * Determines whether a revision is linked to this change; this may not be the case
 737          * when the categorization wasn't done by an edit but a conditional parser function
 738          *
 739          * @since 1.27
 740          *
 741          * @param RecentChange|RCCacheEntry $rcObj
 742          * @return bool
 743          */
 744         protected function isCategorizationWithoutRevision( $rcObj ) {
 745                 return intval( $rcObj->getAttribute( 'rc_type' ) ) === RC_CATEGORIZE
 746                         && intval( $rcObj->getAttribute( 'rc_this_oldid' ) ) === 0;
 747         }
 748
 749         /**
 750          * Get recommended data attributes for a change line.
 751          * @param RecentChange $rc
 752          * @return string[] attribute name => value
 753          */
 754         protected function getDataAttributes( RecentChange $rc ) {
 755                 $attrs = [];
 756
 757                 $type = $rc->getAttribute( 'rc_source' );
 758                 switch ( $type ) {
 759                         case RecentChange::SRC_EDIT:
 760                         case RecentChange::SRC_NEW:
 761                                 $attrs['data-mw-revid'] = $rc->mAttribs['rc_this_oldid'];
 762                                 break;
 763                         case RecentChange::SRC_LOG:
 764                                 $attrs['data-mw-logid'] = $rc->mAttribs['rc_logid'];
 765                                 $attrs['data-mw-logaction'] =
 766                                         $rc->mAttribs['rc_log_type'] . '/' . $rc->mAttribs['rc_log_action'];
 767                                 break;
 768                 }
 769
 770                 $attrs[ 'data-mw-ts' ] = $rc->getAttribute( 'rc_timestamp' );
 771
 772                 return $attrs;
 773         }
 774
 775         /**
 776          * Sets the callable that generates a change line prefix added to the beginning of each line.
 777          *
 778          * @param callable $prefixer Callable to run that generates the change line prefix.
 779          *     Takes three parameters: a RecentChange object, a ChangesList object,
 780          *     and whether the current entry is a grouped entry.
 781          */
 782         public function setChangeLinePrefixer( callable $prefixer ) {
 783                 $this->changeLinePrefixer = $prefixer;
 784         }
 785 }