includes/specials/SpecialEditWatchlist.php

   1 <?php
   2 /**
   3  * @defgroup Watchlist Users watchlist handling
   4  */
   5
   6 /**
   7  * Implements Special:EditWatchlist
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  22  * http://www.gnu.org/copyleft/gpl.html
  23  *
  24  * @file
  25  * @ingroup SpecialPage
  26  * @ingroup Watchlist
  27  */
  28
  29 /**
  30  * Provides the UI through which users can perform editing
  31  * operations on their watchlist
  32  *
  33  * @ingroup SpecialPage
  34  * @ingroup Watchlist
  35  * @author Rob Church <robchur@gmail.com>
  36  */
  37 class SpecialEditWatchlist extends UnlistedSpecialPage {
  38
  39         /**
  40          * Editing modes
  41          */
  42         const EDIT_CLEAR = 1;
  43         const EDIT_RAW = 2;
  44         const EDIT_NORMAL = 3;
  45
  46         protected $successMessage;
  47
  48         protected $toc;
  49
  50         private $badItems = array();
  51
  52         public function __construct() {
  53                 parent::__construct( 'EditWatchlist' );
  54         }
  55
  56         /**
  57          * Main execution point
  58          *
  59          * @param $mode int
  60          */
  61         public function execute( $mode ) {
  62                 $this->setHeaders();
  63
  64                 $out = $this->getOutput();
  65
  66                 # Anons don't get a watchlist
  67                 if( $this->getUser()->isAnon() ) {
  68                         $out->setPageTitle( $this->msg( 'watchnologin' ) );
  69                         $llink = Linker::linkKnown(
  70                                 SpecialPage::getTitleFor( 'Userlogin' ),
  71                                 $this->msg( 'loginreqlink' )->escaped(),
  72                                 array(),
  73                                 array( 'returnto' => $this->getTitle()->getPrefixedText() )
  74                         );
  75                         $out->addHTML( $this->msg( 'watchlistanontext' )->rawParams( $llink )->parse() );
  76                         return;
  77                 }
  78
  79                 $this->checkPermissions();
  80                 $this->checkReadOnly();
  81
  82                 $this->outputHeader();
  83
  84                 $out->addSubtitle( $this->msg( 'watchlistfor2', $this->getUser()->getName()
  85                         )->rawParams( SpecialEditWatchlist::buildTools( null ) ) );
  86
  87                 # B/C: $mode used to be waaay down the parameter list, and the first parameter
  88                 # was $wgUser
  89                 if( $mode instanceof User ) {
  90                         $args = func_get_args();
  91                         if( count( $args >= 4 ) ) {
  92                                 $mode = $args[3];
  93                         }
  94                 }
  95                 $mode = self::getMode( $this->getRequest(), $mode );
  96
  97                 switch( $mode ) {
  98                         case self::EDIT_CLEAR:
  99                                 // The "Clear" link scared people too much.
 100                                 // Pass on to the raw editor, from which it's very easy to clear.
 101
 102                         case self::EDIT_RAW:
 103                                 $out->setPageTitle( $this->msg( 'watchlistedit-raw-title' ) );
 104                                 $form = $this->getRawForm();
 105                                 if( $form->show() ) {
 106                                         $out->addHTML( $this->successMessage );
 107                                         $out->addReturnTo( SpecialPage::getTitleFor( 'Watchlist' ) );
 108                                 }
 109                                 break;
 110
 111                         case self::EDIT_NORMAL:
 112                         default:
 113                                 $out->setPageTitle( $this->msg( 'watchlistedit-normal-title' ) );
 114                                 $form = $this->getNormalForm();
 115                                 if( $form->show() ) {
 116                                         $out->addHTML( $this->successMessage );
 117                                         $out->addReturnTo( SpecialPage::getTitleFor( 'Watchlist' ) );
 118                                 } elseif ( $this->toc !== false ) {
 119                                         $out->prependHTML( $this->toc );
 120                                 }
 121                                 break;
 122                 }
 123         }
 124
 125         /**
 126          * Extract a list of titles from a blob of text, returning
 127          * (prefixed) strings; unwatchable titles are ignored
 128          *
 129          * @param $list String
 130          * @return array
 131          */
 132         private function extractTitles( $list ) {
 133                 $list = explode( "\n", trim( $list ) );
 134                 if( !is_array( $list ) ) {
 135                         return array();
 136                 }
 137                 $titles = array();
 138                 foreach( $list as $text ) {
 139                         $text = trim( $text );
 140                         if( strlen( $text ) > 0 ) {
 141                                 $title = Title::newFromText( $text );
 142                                 if( $title instanceof Title && $title->isWatchable() ) {
 143                                         $titles[] = $title;
 144                                 }
 145                         }
 146                 }
 147
 148                 GenderCache::singleton()->doTitlesArray( $titles );
 149
 150                 $list = array();
 151                 foreach( $titles as $title ) {
 152                         $list[] = $title->getPrefixedText();
 153                 }
 154                 return array_unique( $list );
 155         }
 156
 157         public function submitRaw( $data ) {
 158                 $wanted = $this->extractTitles( $data['Titles'] );
 159                 $current = $this->getWatchlist();
 160
 161                 if( count( $wanted ) > 0 ) {
 162                         $toWatch = array_diff( $wanted, $current );
 163                         $toUnwatch = array_diff( $current, $wanted );
 164                         $this->watchTitles( $toWatch );
 165                         $this->unwatchTitles( $toUnwatch );
 166                         $this->getUser()->invalidateCache();
 167
 168                         if( count( $toWatch ) > 0 || count( $toUnwatch ) > 0 ) {
 169                                 $this->successMessage = $this->msg( 'watchlistedit-raw-done' )->parse();
 170                         } else {
 171                                 return false;
 172                         }
 173
 174                         if( count( $toWatch ) > 0 ) {
 175                                 $this->successMessage .= ' ' . $this->msg( 'watchlistedit-raw-added'
 176                                         )->numParams( count( $toWatch ) )->parse();
 177                                 $this->showTitles( $toWatch, $this->successMessage );
 178                         }
 179
 180                         if( count( $toUnwatch ) > 0 ) {
 181                                 $this->successMessage .= ' ' . $this->msg( 'watchlistedit-raw-removed'
 182                                         )->numParams( count( $toUnwatch ) )->parse();
 183                                 $this->showTitles( $toUnwatch, $this->successMessage );
 184                         }
 185                 } else {
 186                         $this->clearWatchlist();
 187                         $this->getUser()->invalidateCache();
 188
 189                         if( count( $current ) > 0 ) {
 190                                 $this->successMessage = $this->msg( 'watchlistedit-raw-done' )->parse();
 191                         } else {
 192                                 return false;
 193                         }
 194
 195                         $this->successMessage .= ' ' . $this->msg( 'watchlistedit-raw-removed'
 196                                 )->numParams( count( $current ) )->parse();
 197                         $this->showTitles( $current, $this->successMessage );
 198                 }
 199                 return true;
 200         }
 201
 202         /**
 203          * Print out a list of linked titles
 204          *
 205          * $titles can be an array of strings or Title objects; the former
 206          * is preferred, since Titles are very memory-heavy
 207          *
 208          * @param $titles array of strings, or Title objects
 209          * @param $output String
 210          */
 211         private function showTitles( $titles, &$output ) {
 212                 $talk = $this->msg( 'talkpagelinktext' )->escaped();
 213                 // Do a batch existence check
 214                 $batch = new LinkBatch();
 215                 foreach( $titles as $title ) {
 216                         if( !$title instanceof Title ) {
 217                                 $title = Title::newFromText( $title );
 218                         }
 219                         if( $title instanceof Title ) {
 220                                 $batch->addObj( $title );
 221                                 $batch->addObj( $title->getTalkPage() );
 222                         }
 223                 }
 224                 $batch->execute();
 225                 // Print out the list
 226                 $output .= "<ul>\n";
 227                 foreach( $titles as $title ) {
 228                         if( !$title instanceof Title ) {
 229                                 $title = Title::newFromText( $title );
 230                         }
 231                         if( $title instanceof Title ) {
 232                                 $output .= "<li>"
 233                                         . Linker::link( $title )
 234                                         . ' (' . Linker::link( $title->getTalkPage(), $talk )
 235                                         . ")</li>\n";
 236                         }
 237                 }
 238                 $output .= "</ul>\n";
 239         }
 240
 241         /**
 242          * Prepare a list of titles on a user's watchlist (excluding talk pages)
 243          * and return an array of (prefixed) strings
 244          *
 245          * @return array
 246          */
 247         private function getWatchlist() {
 248                 $list = array();
 249                 $dbr = wfGetDB( DB_MASTER );
 250                 $res = $dbr->select(
 251                         'watchlist',
 252                         array(
 253                                 'wl_namespace', 'wl_title'
 254                         ), array(
 255                                 'wl_user' => $this->getUser()->getId(),
 256                         ),
 257                         __METHOD__
 258                 );
 259                 if( $res->numRows() > 0 ) {
 260                         $titles = array();
 261                         foreach ( $res as $row ) {
 262                                 $title = Title::makeTitleSafe( $row->wl_namespace, $row->wl_title );
 263                                 if ( $this->checkTitle( $title, $row->wl_namespace, $row->wl_title )
 264                                         && !$title->isTalkPage()
 265                                 ) {
 266                                         $titles[] = $title;
 267                                 }
 268                         }
 269                         $res->free();
 270
 271                         GenderCache::singleton()->doTitlesArray( $titles );
 272
 273                         foreach( $titles as $title ) {
 274                                 $list[] = $title->getPrefixedText();
 275                         }
 276                 }
 277                 $this->cleanupWatchlist();
 278                 return $list;
 279         }
 280
 281         /**
 282          * Get a list of titles on a user's watchlist, excluding talk pages,
 283          * and return as a two-dimensional array with namespace and title.
 284          *
 285          * @return array
 286          */
 287         private function getWatchlistInfo() {
 288                 $titles = array();
 289                 $dbr = wfGetDB( DB_MASTER );
 290
 291                 $res = $dbr->select(
 292                         array( 'watchlist' ),
 293                         array( 'wl_namespace', 'wl_title' ),
 294                         array( 'wl_user' => $this->getUser()->getId() ),
 295                         __METHOD__,
 296                         array( 'ORDER BY' => array( 'wl_namespace', 'wl_title' ) )
 297                 );
 298
 299                 $lb = new LinkBatch();
 300                 foreach ( $res as $row ) {
 301                         $lb->add( $row->wl_namespace, $row->wl_title );
 302                         if ( !MWNamespace::isTalk( $row->wl_namespace ) ) {
 303                                 $titles[$row->wl_namespace][$row->wl_title] = 1;
 304                         }
 305                 }
 306
 307                 $lb->execute();
 308                 return $titles;
 309         }
 310
 311         /**
 312          * Validates watchlist entry
 313          *
 314          * @param Title $title
 315          * @param int $namespace
 316          * @param String $dbKey
 317          * @return bool: Whether this item is valid
 318          */
 319         private function checkTitle( $title, $namespace, $dbKey ) {
 320                 if ( $title
 321                         && ( $title->isExternal()
 322                                 || $title->getNamespace() < 0
 323                         )
 324                 ) {
 325                         $title = false; // unrecoverable
 326                 }
 327                 if ( !$title
 328                         || $title->getNamespace() != $namespace
 329                         || $title->getDBkey() != $dbKey
 330                 ) {
 331                         $this->badItems[] = array( $title, $namespace, $dbKey );
 332                 }
 333                 return (bool)$title;
 334         }
 335
 336         /**
 337          * Attempts to clean up broken items
 338          */
 339         private function cleanupWatchlist() {
 340                 if( !count( $this->badItems ) ) {
 341                         return; //nothing to do
 342                 }
 343                 $dbw = wfGetDB( DB_MASTER );
 344                 $user = $this->getUser();
 345                 foreach ( $this->badItems as $row ) {
 346                         list( $title, $namespace, $dbKey ) = $row;
 347                         wfDebug( "User {$user->getName()} has broken watchlist item ns($namespace):$dbKey, "
 348                                 . ( $title ? 'cleaning up' : 'deleting' ) . ".\n"
 349                         );
 350
 351                         $dbw->delete( 'watchlist',
 352                                 array(
 353                                         'wl_user' => $user->getId(),
 354                                         'wl_namespace' => $namespace,
 355                                         'wl_title' => $dbKey,
 356                                 ),
 357                                 __METHOD__
 358                         );
 359
 360                         // Can't just do an UPDATE instead of DELETE/INSERT due to unique index
 361                         if ( $title ) {
 362                                 $user->addWatch( $title );
 363                         }
 364                 }
 365         }
 366
 367         /**
 368          * Remove all titles from a user's watchlist
 369          */
 370         private function clearWatchlist() {
 371                 $dbw = wfGetDB( DB_MASTER );
 372                 $dbw->delete(
 373                         'watchlist',
 374                         array( 'wl_user' => $this->getUser()->getId() ),
 375                         __METHOD__
 376                 );
 377         }
 378
 379         /**
 380          * Add a list of titles to a user's watchlist
 381          *
 382          * $titles can be an array of strings or Title objects; the former
 383          * is preferred, since Titles are very memory-heavy
 384          *
 385          * @param $titles Array of strings, or Title objects
 386          */
 387         private function watchTitles( $titles ) {
 388                 $dbw = wfGetDB( DB_MASTER );
 389                 $rows = array();
 390                 foreach( $titles as $title ) {
 391                         if( !$title instanceof Title ) {
 392                                 $title = Title::newFromText( $title );
 393                         }
 394                         if( $title instanceof Title ) {
 395                                 $rows[] = array(
 396                                         'wl_user' => $this->getUser()->getId(),
 397                                         'wl_namespace' => MWNamespace::getSubject( $title->getNamespace() ),
 398                                         'wl_title' => $title->getDBkey(),
 399                                         'wl_notificationtimestamp' => null,
 400                                 );
 401                                 $rows[] = array(
 402                                         'wl_user' => $this->getUser()->getId(),
 403                                         'wl_namespace' => MWNamespace::getTalk( $title->getNamespace() ),
 404                                         'wl_title' => $title->getDBkey(),
 405                                         'wl_notificationtimestamp' => null,
 406                                 );
 407                         }
 408                 }
 409                 $dbw->insert( 'watchlist', $rows, __METHOD__, 'IGNORE' );
 410         }
 411
 412         /**
 413          * Remove a list of titles from a user's watchlist
 414          *
 415          * $titles can be an array of strings or Title objects; the former
 416          * is preferred, since Titles are very memory-heavy
 417          *
 418          * @param $titles Array of strings, or Title objects
 419          */
 420         private function unwatchTitles( $titles ) {
 421                 $dbw = wfGetDB( DB_MASTER );
 422                 foreach( $titles as $title ) {
 423                         if( !$title instanceof Title ) {
 424                                 $title = Title::newFromText( $title );
 425                         }
 426                         if( $title instanceof Title ) {
 427                                 $dbw->delete(
 428                                         'watchlist',
 429                                         array(
 430                                                 'wl_user' => $this->getUser()->getId(),
 431                                                 'wl_namespace' => MWNamespace::getSubject( $title->getNamespace() ),
 432                                                 'wl_title' => $title->getDBkey(),
 433                                         ),
 434                                         __METHOD__
 435                                 );
 436                                 $dbw->delete(
 437                                         'watchlist',
 438                                         array(
 439                                                 'wl_user' => $this->getUser()->getId(),
 440                                                 'wl_namespace' => MWNamespace::getTalk( $title->getNamespace() ),
 441                                                 'wl_title' => $title->getDBkey(),
 442                                         ),
 443                                         __METHOD__
 444                                 );
 445                                 $page = WikiPage::factory( $title );
 446                                 wfRunHooks( 'UnwatchArticleComplete', array( $this->getUser(), &$page ) );
 447                         }
 448                 }
 449         }
 450
 451         public function submitNormal( $data ) {
 452                 $removed = array();
 453
 454                 foreach( $data as $titles ) {
 455                         $this->unwatchTitles( $titles );
 456                         $removed = array_merge( $removed, $titles );
 457                 }
 458
 459                 if( count( $removed ) > 0 ) {
 460                         $this->successMessage = $this->msg( 'watchlistedit-normal-done'
 461                                 )->numParams( count( $removed ) )->parse();
 462                         $this->showTitles( $removed, $this->successMessage );
 463                         return true;
 464                 } else {
 465                         return false;
 466                 }
 467         }
 468
 469         /**
 470          * Get the standard watchlist editing form
 471          *
 472          * @return HTMLForm
 473          */
 474         protected function getNormalForm() {
 475                 global $wgContLang;
 476
 477                 $fields = array();
 478                 $count = 0;
 479
 480                 foreach( $this->getWatchlistInfo() as $namespace => $pages ) {
 481                         if ( $namespace >= 0 ) {
 482                                 $fields['TitlesNs' . $namespace] = array(
 483                                         'class' => 'EditWatchlistCheckboxSeriesField',
 484                                         'options' => array(),
 485                                         'section' => "ns$namespace",
 486                                 );
 487                         }
 488
 489                         foreach( array_keys( $pages ) as $dbkey ) {
 490                                 $title = Title::makeTitleSafe( $namespace, $dbkey );
 491                                 if ( $this->checkTitle( $title, $namespace, $dbkey ) ) {
 492                                         $text = $this->buildRemoveLine( $title );
 493                                         $fields['TitlesNs' . $namespace]['options'][$text] = $title->getPrefixedText();
 494                                         $count++;
 495                                 }
 496                         }
 497                 }
 498                 $this->cleanupWatchlist();
 499
 500                 if ( count( $fields ) > 1 && $count > 30 ) {
 501                         $this->toc = Linker::tocIndent();
 502                         $tocLength = 0;
 503                         foreach( $fields as $data ) {
 504
 505                                 # strip out the 'ns' prefix from the section name:
 506                                 $ns = substr( $data['section'], 2 );
 507
 508                                 $nsText = ($ns == NS_MAIN)
 509                                         ? $this->msg( 'blanknamespace' )->escaped()
 510                                         : htmlspecialchars( $wgContLang->getFormattedNsText( $ns ) );
 511                                 $this->toc .= Linker::tocLine( "editwatchlist-{$data['section']}", $nsText,
 512                                         $this->getLanguage()->formatNum( ++$tocLength ), 1 ) . Linker::tocLineEnd();
 513                         }
 514                         $this->toc = Linker::tocList( $this->toc );
 515                 } else {
 516                         $this->toc = false;
 517                 }
 518
 519                 $form = new EditWatchlistNormalHTMLForm( $fields, $this->getContext() );
 520                 $form->setTitle( $this->getTitle() );
 521                 $form->setSubmitTextMsg( 'watchlistedit-normal-submit' );
 522                 # Used message keys: 'accesskey-watchlistedit-normal-submit', 'tooltip-watchlistedit-normal-submit'
 523                 $form->setSubmitTooltip( 'watchlistedit-normal-submit' );
 524                 $form->setWrapperLegendMsg( 'watchlistedit-normal-legend' );
 525                 $form->addHeaderText( $this->msg( 'watchlistedit-normal-explain' )->parse() );
 526                 $form->setSubmitCallback( array( $this, 'submitNormal' ) );
 527                 return $form;
 528         }
 529
 530         /**
 531          * Build the label for a checkbox, with a link to the title, and various additional bits
 532          *
 533          * @param $title Title
 534          * @return string
 535          */
 536         private function buildRemoveLine( $title ) {
 537                 $link = Linker::link( $title );
 538                 if( $title->isRedirect() ) {
 539                         // Linker already makes class mw-redirect, so this is redundant
 540                         $link = '<span class="watchlistredir">' . $link . '</span>';
 541                 }
 542                 $tools[] = Linker::link( $title->getTalkPage(), $this->msg( 'talkpagelinktext' )->escaped() );
 543                 if( $title->exists() ) {
 544                         $tools[] = Linker::linkKnown(
 545                                 $title,
 546                                 $this->msg( 'history_short' )->escaped(),
 547                                 array(),
 548                                 array( 'action' => 'history' )
 549                         );
 550                 }
 551                 if( $title->getNamespace() == NS_USER && !$title->isSubpage() ) {
 552                         $tools[] = Linker::linkKnown(
 553                                 SpecialPage::getTitleFor( 'Contributions', $title->getText() ),
 554                                 $this->msg( 'contributions' )->escaped()
 555                         );
 556                 }
 557
 558                 wfRunHooks( 'WatchlistEditorBuildRemoveLine', array( &$tools, $title, $title->isRedirect(), $this->getSkin() ) );
 559
 560                 return $link . " (" . $this->getLanguage()->pipeList( $tools ) . ")";
 561         }
 562
 563         /**
 564          * Get a form for editing the watchlist in "raw" mode
 565          *
 566          * @return HTMLForm
 567          */
 568         protected function getRawForm() {
 569                 $titles = implode( $this->getWatchlist(), "\n" );
 570                 $fields = array(
 571                         'Titles' => array(
 572                                 'type' => 'textarea',
 573                                 'label-message' => 'watchlistedit-raw-titles',
 574                                 'default' => $titles,
 575                         ),
 576                 );
 577                 $form = new HTMLForm( $fields, $this->getContext() );
 578                 $form->setTitle( $this->getTitle( 'raw' ) );
 579                 $form->setSubmitTextMsg( 'watchlistedit-raw-submit' );
 580                 # Used message keys: 'accesskey-watchlistedit-raw-submit', 'tooltip-watchlistedit-raw-submit'
 581                 $form->setSubmitTooltip( 'watchlistedit-raw-submit' );
 582                 $form->setWrapperLegendMsg( 'watchlistedit-raw-legend' );
 583                 $form->addHeaderText( $this->msg( 'watchlistedit-raw-explain' )->parse() );
 584                 $form->setSubmitCallback( array( $this, 'submitRaw' ) );
 585                 return $form;
 586         }
 587
 588         /**
 589          * Determine whether we are editing the watchlist, and if so, what
 590          * kind of editing operation
 591          *
 592          * @param $request WebRequest
 593          * @param $par mixed
 594          * @return int
 595          */
 596         public static function getMode( $request, $par ) {
 597                 $mode = strtolower( $request->getVal( 'action', $par ) );
 598                 switch( $mode ) {
 599                         case 'clear':
 600                         case self::EDIT_CLEAR:
 601                                 return self::EDIT_CLEAR;
 602
 603                         case 'raw':
 604                         case self::EDIT_RAW:
 605                                 return self::EDIT_RAW;
 606
 607                         case 'edit':
 608                         case self::EDIT_NORMAL:
 609                                 return self::EDIT_NORMAL;
 610
 611                         default:
 612                                 return false;
 613                 }
 614         }
 615
 616         /**
 617          * Build a set of links for convenient navigation
 618          * between watchlist viewing and editing modes
 619          *
 620          * @param $unused
 621          * @return string
 622          */
 623         public static function buildTools( $unused ) {
 624                 global $wgLang;
 625
 626                 $tools = array();
 627                 $modes = array(
 628                         'view' => array( 'Watchlist', false ),
 629                         'edit' => array( 'EditWatchlist', false ),
 630                         'raw' => array( 'EditWatchlist', 'raw' ),
 631                 );
 632                 foreach( $modes as $mode => $arr ) {
 633                         // can use messages 'watchlisttools-view', 'watchlisttools-edit', 'watchlisttools-raw'
 634                         $tools[] = Linker::linkKnown(
 635                                 SpecialPage::getTitleFor( $arr[0], $arr[1] ),
 636                                 wfMessage( "watchlisttools-{$mode}" )->escaped()
 637                         );
 638                 }
 639                 return Html::rawElement( 'span',
 640                                         array( 'class' => 'mw-watchlist-toollinks' ),
 641                                         wfMessage( 'parentheses', $wgLang->pipeList( $tools ) )->text() );
 642         }
 643 }
 644
 645 # B/C since 1.18
 646 class WatchlistEditor extends SpecialEditWatchlist {}
 647
 648 /**
 649  * Extend HTMLForm purely so we can have a more sane way of getting the section headers
 650  */
 651 class EditWatchlistNormalHTMLForm extends HTMLForm {
 652         public function getLegend( $namespace ) {
 653                 $namespace = substr( $namespace, 2 );
 654                 return $namespace == NS_MAIN
 655                         ? $this->msg( 'blanknamespace' )->escaped()
 656                         : htmlspecialchars( $this->getContext()->getLanguage()->getFormattedNsText( $namespace ) );
 657         }
 658         public function getBody() {
 659                 return $this->displaySection( $this->mFieldTree, '', 'editwatchlist-' );
 660         }
 661 }
 662
 663 class EditWatchlistCheckboxSeriesField extends HTMLMultiSelectField {
 664         /**
 665          * HTMLMultiSelectField throws validation errors if we get input data
 666          * that doesn't match the data set in the form setup. This causes
 667          * problems if something gets removed from the watchlist while the
 668          * form is open (bug 32126), but we know that invalid items will
 669          * be harmless so we can override it here.
 670          *
 671          * @param $value String the value the field was submitted with
 672          * @param $alldata Array the data collected from the form
 673          * @return Mixed Bool true on success, or String error to display.
 674          */
 675         function validate( $value, $alldata ) {
 676                 // Need to call into grandparent to be a good citizen. :)
 677                 return HTMLFormField::validate( $value, $alldata );
 678         }
 679 }