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          * Editing modes. EDIT_CLEAR is no longer used; the "Clear" link scared people
  40          * too much. Now it's passed on to the raw editor, from which it's very easy to clear.
  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', 'editmywatchlist' );
  54         }
  55
  56         /**
  57          * Main execution point
  58          *
  59          * @param int $mode
  60          */
  61         public function execute( $mode ) {
  62                 $this->setHeaders();
  63
  64                 # Anons don't get a watchlist
  65                 $this->requireLogin( 'watchlistanontext' );
  66
  67                 $out = $this->getOutput();
  68
  69                 $this->checkPermissions();
  70                 $this->checkReadOnly();
  71
  72                 $this->outputHeader();
  73
  74                 $out->addSubtitle( $this->msg( 'watchlistfor2', $this->getUser()->getName() )
  75                         ->rawParams( SpecialEditWatchlist::buildTools( null ) ) );
  76
  77                 # B/C: $mode used to be waaay down the parameter list, and the first parameter
  78                 # was $wgUser
  79                 if ( $mode instanceof User ) {
  80                         $args = func_get_args();
  81                         if ( count( $args ) >= 4 ) {
  82                                 $mode = $args[3];
  83                         }
  84                 }
  85                 $mode = self::getMode( $this->getRequest(), $mode );
  86
  87                 switch ( $mode ) {
  88                         case self::EDIT_RAW:
  89                                 $out->setPageTitle( $this->msg( 'watchlistedit-raw-title' ) );
  90                                 $form = $this->getRawForm();
  91                                 if ( $form->show() ) {
  92                                         $out->addHTML( $this->successMessage );
  93                                         $out->addReturnTo( SpecialPage::getTitleFor( 'Watchlist' ) );
  94                                 }
  95                                 break;
  96
  97                         case self::EDIT_NORMAL:
  98                         default:
  99                                 $out->setPageTitle( $this->msg( 'watchlistedit-normal-title' ) );
 100                                 $form = $this->getNormalForm();
 101                                 if ( $form->show() ) {
 102                                         $out->addHTML( $this->successMessage );
 103                                         $out->addReturnTo( SpecialPage::getTitleFor( 'Watchlist' ) );
 104                                 } elseif ( $this->toc !== false ) {
 105                                         $out->prependHTML( $this->toc );
 106                                         $out->addModules( 'mediawiki.toc' );
 107                                 }
 108                                 break;
 109                 }
 110         }
 111
 112         /**
 113          * Extract a list of titles from a blob of text, returning
 114          * (prefixed) strings; unwatchable titles are ignored
 115          *
 116          * @param string $list
 117          * @return array
 118          */
 119         private function extractTitles( $list ) {
 120                 $list = explode( "\n", trim( $list ) );
 121                 if ( !is_array( $list ) ) {
 122                         return array();
 123                 }
 124
 125                 $titles = array();
 126
 127                 foreach ( $list as $text ) {
 128                         $text = trim( $text );
 129                         if ( strlen( $text ) > 0 ) {
 130                                 $title = Title::newFromText( $text );
 131                                 if ( $title instanceof Title && $title->isWatchable() ) {
 132                                         $titles[] = $title;
 133                                 }
 134                         }
 135                 }
 136
 137                 GenderCache::singleton()->doTitlesArray( $titles );
 138
 139                 $list = array();
 140                 /** @var Title $title */
 141                 foreach ( $titles as $title ) {
 142                         $list[] = $title->getPrefixedText();
 143                 }
 144
 145                 return array_unique( $list );
 146         }
 147
 148         public function submitRaw( $data ) {
 149                 $wanted = $this->extractTitles( $data['Titles'] );
 150                 $current = $this->getWatchlist();
 151
 152                 if ( count( $wanted ) > 0 ) {
 153                         $toWatch = array_diff( $wanted, $current );
 154                         $toUnwatch = array_diff( $current, $wanted );
 155                         $this->watchTitles( $toWatch );
 156                         $this->unwatchTitles( $toUnwatch );
 157                         $this->getUser()->invalidateCache();
 158
 159                         if ( count( $toWatch ) > 0 || count( $toUnwatch ) > 0 ) {
 160                                 $this->successMessage = $this->msg( 'watchlistedit-raw-done' )->parse();
 161                         } else {
 162                                 return false;
 163                         }
 164
 165                         if ( count( $toWatch ) > 0 ) {
 166                                 $this->successMessage .= ' ' . $this->msg( 'watchlistedit-raw-added' )
 167                                         ->numParams( count( $toWatch ) )->parse();
 168                                 $this->showTitles( $toWatch, $this->successMessage );
 169                         }
 170
 171                         if ( count( $toUnwatch ) > 0 ) {
 172                                 $this->successMessage .= ' ' . $this->msg( 'watchlistedit-raw-removed' )
 173                                         ->numParams( count( $toUnwatch ) )->parse();
 174                                 $this->showTitles( $toUnwatch, $this->successMessage );
 175                         }
 176                 } else {
 177                         $this->clearWatchlist();
 178                         $this->getUser()->invalidateCache();
 179
 180                         if ( count( $current ) > 0 ) {
 181                                 $this->successMessage = $this->msg( 'watchlistedit-raw-done' )->parse();
 182                         } else {
 183                                 return false;
 184                         }
 185
 186                         $this->successMessage .= ' ' . $this->msg( 'watchlistedit-raw-removed' )
 187                                 ->numParams( count( $current ) )->parse();
 188                         $this->showTitles( $current, $this->successMessage );
 189                 }
 190
 191                 return true;
 192         }
 193
 194         /**
 195          * Print out a list of linked titles
 196          *
 197          * $titles can be an array of strings or Title objects; the former
 198          * is preferred, since Titles are very memory-heavy
 199          *
 200          * @param array $titles Array of strings, or Title objects
 201          * @param string $output
 202          */
 203         private function showTitles( $titles, &$output ) {
 204                 $talk = $this->msg( 'talkpagelinktext' )->escaped();
 205                 // Do a batch existence check
 206                 $batch = new LinkBatch();
 207                 foreach ( $titles as $title ) {
 208                         if ( !$title instanceof Title ) {
 209                                 $title = Title::newFromText( $title );
 210                         }
 211
 212                         if ( $title instanceof Title ) {
 213                                 $batch->addObj( $title );
 214                                 $batch->addObj( $title->getTalkPage() );
 215                         }
 216                 }
 217
 218                 $batch->execute();
 219
 220                 // Print out the list
 221                 $output .= "<ul>\n";
 222
 223                 foreach ( $titles as $title ) {
 224                         if ( !$title instanceof Title ) {
 225                                 $title = Title::newFromText( $title );
 226                         }
 227
 228                         if ( $title instanceof Title ) {
 229                                 $output .= "<li>"
 230                                         . Linker::link( $title )
 231                                         . ' (' . Linker::link( $title->getTalkPage(), $talk )
 232                                         . ")</li>\n";
 233                         }
 234                 }
 235
 236                 $output .= "</ul>\n";
 237         }
 238
 239         /**
 240          * Prepare a list of titles on a user's watchlist (excluding talk pages)
 241          * and return an array of (prefixed) strings
 242          *
 243          * @return array
 244          */
 245         private function getWatchlist() {
 246                 $list = array();
 247                 $dbr = wfGetDB( DB_MASTER );
 248
 249                 $res = $dbr->select(
 250                         'watchlist',
 251                         array(
 252                                 'wl_namespace', 'wl_title'
 253                         ), array(
 254                                 'wl_user' => $this->getUser()->getId(),
 255                         ),
 256                         __METHOD__
 257                 );
 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
 264                                 if ( $this->checkTitle( $title, $row->wl_namespace, $row->wl_title )
 265                                         && !$title->isTalkPage()
 266                                 ) {
 267                                         $titles[] = $title;
 268                                 }
 269                         }
 270                         $res->free();
 271
 272                         GenderCache::singleton()->doTitlesArray( $titles );
 273
 274                         foreach ( $titles as $title ) {
 275                                 $list[] = $title->getPrefixedText();
 276                         }
 277                 }
 278
 279                 $this->cleanupWatchlist();
 280
 281                 return $list;
 282         }
 283
 284         /**
 285          * Get a list of titles on a user's watchlist, excluding talk pages,
 286          * and return as a two-dimensional array with namespace and title.
 287          *
 288          * @return array
 289          */
 290         private function getWatchlistInfo() {
 291                 $titles = array();
 292                 $dbr = wfGetDB( DB_MASTER );
 293
 294                 $res = $dbr->select(
 295                         array( 'watchlist' ),
 296                         array( 'wl_namespace', 'wl_title' ),
 297                         array( 'wl_user' => $this->getUser()->getId() ),
 298                         __METHOD__,
 299                         array( 'ORDER BY' => array( 'wl_namespace', 'wl_title' ) )
 300                 );
 301
 302                 $lb = new LinkBatch();
 303
 304                 foreach ( $res as $row ) {
 305                         $lb->add( $row->wl_namespace, $row->wl_title );
 306                         if ( !MWNamespace::isTalk( $row->wl_namespace ) ) {
 307                                 $titles[$row->wl_namespace][$row->wl_title] = 1;
 308                         }
 309                 }
 310
 311                 $lb->execute();
 312
 313                 return $titles;
 314         }
 315
 316         /**
 317          * Validates watchlist entry
 318          *
 319          * @param Title $title
 320          * @param int $namespace
 321          * @param string $dbKey
 322          * @return bool Whether this item is valid
 323          */
 324         private function checkTitle( $title, $namespace, $dbKey ) {
 325                 if ( $title
 326                         && ( $title->isExternal()
 327                                 || $title->getNamespace() < 0
 328                         )
 329                 ) {
 330                         $title = false; // unrecoverable
 331                 }
 332
 333                 if ( !$title
 334                         || $title->getNamespace() != $namespace
 335                         || $title->getDBkey() != $dbKey
 336                 ) {
 337                         $this->badItems[] = array( $title, $namespace, $dbKey );
 338                 }
 339
 340                 return (bool)$title;
 341         }
 342
 343         /**
 344          * Attempts to clean up broken items
 345          */
 346         private function cleanupWatchlist() {
 347                 if ( !count( $this->badItems ) ) {
 348                         return; //nothing to do
 349                 }
 350
 351                 $dbw = wfGetDB( DB_MASTER );
 352                 $user = $this->getUser();
 353
 354                 foreach ( $this->badItems as $row ) {
 355                         list( $title, $namespace, $dbKey ) = $row;
 356                         $action = $title ? 'cleaning up' : 'deleting';
 357                         wfDebug( "User {$user->getName()} has broken watchlist item ns($namespace):$dbKey, $action.\n" );
 358
 359                         $dbw->delete( 'watchlist',
 360                                 array(
 361                                         'wl_user' => $user->getId(),
 362                                         'wl_namespace' => $namespace,
 363                                         'wl_title' => $dbKey,
 364                                 ),
 365                                 __METHOD__
 366                         );
 367
 368                         // Can't just do an UPDATE instead of DELETE/INSERT due to unique index
 369                         if ( $title ) {
 370                                 $user->addWatch( $title );
 371                         }
 372                 }
 373         }
 374
 375         /**
 376          * Remove all titles from a user's watchlist
 377          */
 378         private function clearWatchlist() {
 379                 $dbw = wfGetDB( DB_MASTER );
 380                 $dbw->delete(
 381                         'watchlist',
 382                         array( 'wl_user' => $this->getUser()->getId() ),
 383                         __METHOD__
 384                 );
 385         }
 386
 387         /**
 388          * Add a list of titles to a user's watchlist
 389          *
 390          * $titles can be an array of strings or Title objects; the former
 391          * is preferred, since Titles are very memory-heavy
 392          *
 393          * @param array $titles Array of strings, or Title objects
 394          */
 395         private function watchTitles( $titles ) {
 396                 $dbw = wfGetDB( DB_MASTER );
 397                 $rows = array();
 398
 399                 foreach ( $titles as $title ) {
 400                         if ( !$title instanceof Title ) {
 401                                 $title = Title::newFromText( $title );
 402                         }
 403
 404                         if ( $title instanceof Title ) {
 405                                 $rows[] = array(
 406                                         'wl_user' => $this->getUser()->getId(),
 407                                         'wl_namespace' => MWNamespace::getSubject( $title->getNamespace() ),
 408                                         'wl_title' => $title->getDBkey(),
 409                                         'wl_notificationtimestamp' => null,
 410                                 );
 411                                 $rows[] = array(
 412                                         'wl_user' => $this->getUser()->getId(),
 413                                         'wl_namespace' => MWNamespace::getTalk( $title->getNamespace() ),
 414                                         'wl_title' => $title->getDBkey(),
 415                                         'wl_notificationtimestamp' => null,
 416                                 );
 417                         }
 418                 }
 419
 420                 $dbw->insert( 'watchlist', $rows, __METHOD__, 'IGNORE' );
 421         }
 422
 423         /**
 424          * Remove a list of titles from a user's watchlist
 425          *
 426          * $titles can be an array of strings or Title objects; the former
 427          * is preferred, since Titles are very memory-heavy
 428          *
 429          * @param array $titles Array of strings, or Title objects
 430          */
 431         private function unwatchTitles( $titles ) {
 432                 $dbw = wfGetDB( DB_MASTER );
 433
 434                 foreach ( $titles as $title ) {
 435                         if ( !$title instanceof Title ) {
 436                                 $title = Title::newFromText( $title );
 437                         }
 438
 439                         if ( $title instanceof Title ) {
 440                                 $dbw->delete(
 441                                         'watchlist',
 442                                         array(
 443                                                 'wl_user' => $this->getUser()->getId(),
 444                                                 'wl_namespace' => MWNamespace::getSubject( $title->getNamespace() ),
 445                                                 'wl_title' => $title->getDBkey(),
 446                                         ),
 447                                         __METHOD__
 448                                 );
 449
 450                                 $dbw->delete(
 451                                         'watchlist',
 452                                         array(
 453                                                 'wl_user' => $this->getUser()->getId(),
 454                                                 'wl_namespace' => MWNamespace::getTalk( $title->getNamespace() ),
 455                                                 'wl_title' => $title->getDBkey(),
 456                                         ),
 457                                         __METHOD__
 458                                 );
 459
 460                                 $page = WikiPage::factory( $title );
 461                                 wfRunHooks( 'UnwatchArticleComplete', array( $this->getUser(), &$page ) );
 462                         }
 463                 }
 464         }
 465
 466         public function submitNormal( $data ) {
 467                 $removed = array();
 468
 469                 foreach ( $data as $titles ) {
 470                         $this->unwatchTitles( $titles );
 471                         $removed = array_merge( $removed, $titles );
 472                 }
 473
 474                 if ( count( $removed ) > 0 ) {
 475                         $this->successMessage = $this->msg( 'watchlistedit-normal-done'
 476                         )->numParams( count( $removed ) )->parse();
 477                         $this->showTitles( $removed, $this->successMessage );
 478
 479                         return true;
 480                 } else {
 481                         return false;
 482                 }
 483         }
 484
 485         /**
 486          * Get the standard watchlist editing form
 487          *
 488          * @return HTMLForm
 489          */
 490         protected function getNormalForm() {
 491                 global $wgContLang;
 492
 493                 $fields = array();
 494                 $count = 0;
 495
 496                 foreach ( $this->getWatchlistInfo() as $namespace => $pages ) {
 497                         if ( $namespace >= 0 ) {
 498                                 $fields['TitlesNs' . $namespace] = array(
 499                                         'class' => 'EditWatchlistCheckboxSeriesField',
 500                                         'options' => array(),
 501                                         'section' => "ns$namespace",
 502                                 );
 503                         }
 504
 505                         foreach ( array_keys( $pages ) as $dbkey ) {
 506                                 $title = Title::makeTitleSafe( $namespace, $dbkey );
 507
 508                                 if ( $this->checkTitle( $title, $namespace, $dbkey ) ) {
 509                                         $text = $this->buildRemoveLine( $title );
 510                                         $fields['TitlesNs' . $namespace]['options'][$text] = $title->getPrefixedText();
 511                                         $count++;
 512                                 }
 513                         }
 514                 }
 515                 $this->cleanupWatchlist();
 516
 517                 if ( count( $fields ) > 1 && $count > 30 ) {
 518                         $this->toc = Linker::tocIndent();
 519                         $tocLength = 0;
 520
 521                         foreach ( $fields as $data ) {
 522                                 # strip out the 'ns' prefix from the section name:
 523                                 $ns = substr( $data['section'], 2 );
 524
 525                                 $nsText = ( $ns == NS_MAIN )
 526                                         ? $this->msg( 'blanknamespace' )->escaped()
 527                                         : htmlspecialchars( $wgContLang->getFormattedNsText( $ns ) );
 528                                 $this->toc .= Linker::tocLine( "editwatchlist-{$data['section']}", $nsText,
 529                                         $this->getLanguage()->formatNum( ++$tocLength ), 1 ) . Linker::tocLineEnd();
 530                         }
 531
 532                         $this->toc = Linker::tocList( $this->toc );
 533                 } else {
 534                         $this->toc = false;
 535                 }
 536
 537                 $context = new DerivativeContext( $this->getContext() );
 538                 $context->setTitle( $this->getPageTitle() ); // Remove subpage
 539                 $form = new EditWatchlistNormalHTMLForm( $fields, $context );
 540                 $form->setSubmitTextMsg( 'watchlistedit-normal-submit' );
 541                 # Used message keys: 'accesskey-watchlistedit-normal-submit', 'tooltip-watchlistedit-normal-submit'
 542                 $form->setSubmitTooltip( 'watchlistedit-normal-submit' );
 543                 $form->setWrapperLegendMsg( 'watchlistedit-normal-legend' );
 544                 $form->addHeaderText( $this->msg( 'watchlistedit-normal-explain' )->parse() );
 545                 $form->setSubmitCallback( array( $this, 'submitNormal' ) );
 546
 547                 return $form;
 548         }
 549
 550         /**
 551          * Build the label for a checkbox, with a link to the title, and various additional bits
 552          *
 553          * @param Title $title
 554          * @return string
 555          */
 556         private function buildRemoveLine( $title ) {
 557                 $link = Linker::link( $title );
 558
 559                 if ( $title->isRedirect() ) {
 560                         // Linker already makes class mw-redirect, so this is redundant
 561                         $link = '<span class="watchlistredir">' . $link . '</span>';
 562                 }
 563
 564                 $tools[] = Linker::link( $title->getTalkPage(), $this->msg( 'talkpagelinktext' )->escaped() );
 565
 566                 if ( $title->exists() ) {
 567                         $tools[] = Linker::linkKnown(
 568                                 $title,
 569                                 $this->msg( 'history_short' )->escaped(),
 570                                 array(),
 571                                 array( 'action' => 'history' )
 572                         );
 573                 }
 574
 575                 if ( $title->getNamespace() == NS_USER && !$title->isSubpage() ) {
 576                         $tools[] = Linker::linkKnown(
 577                                 SpecialPage::getTitleFor( 'Contributions', $title->getText() ),
 578                                 $this->msg( 'contributions' )->escaped()
 579                         );
 580                 }
 581
 582                 wfRunHooks( 'WatchlistEditorBuildRemoveLine', array( &$tools, $title, $title->isRedirect(), $this->getSkin() ) );
 583
 584                 return $link . " (" . $this->getLanguage()->pipeList( $tools ) . ")";
 585         }
 586
 587         /**
 588          * Get a form for editing the watchlist in "raw" mode
 589          *
 590          * @return HTMLForm
 591          */
 592         protected function getRawForm() {
 593                 $titles = implode( $this->getWatchlist(), "\n" );
 594                 $fields = array(
 595                         'Titles' => array(
 596                                 'type' => 'textarea',
 597                                 'label-message' => 'watchlistedit-raw-titles',
 598                                 'default' => $titles,
 599                         ),
 600                 );
 601                 $context = new DerivativeContext( $this->getContext() );
 602                 $context->setTitle( $this->getPageTitle( 'raw' ) ); // Reset subpage
 603                 $form = new HTMLForm( $fields, $context );
 604                 $form->setSubmitTextMsg( 'watchlistedit-raw-submit' );
 605                 # Used message keys: 'accesskey-watchlistedit-raw-submit', 'tooltip-watchlistedit-raw-submit'
 606                 $form->setSubmitTooltip( 'watchlistedit-raw-submit' );
 607                 $form->setWrapperLegendMsg( 'watchlistedit-raw-legend' );
 608                 $form->addHeaderText( $this->msg( 'watchlistedit-raw-explain' )->parse() );
 609                 $form->setSubmitCallback( array( $this, 'submitRaw' ) );
 610
 611                 return $form;
 612         }
 613
 614         /**
 615          * Determine whether we are editing the watchlist, and if so, what
 616          * kind of editing operation
 617          *
 618          * @param WebRequest $request
 619          * @param string $par
 620          * @return int
 621          */
 622         public static function getMode( $request, $par ) {
 623                 $mode = strtolower( $request->getVal( 'action', $par ) );
 624
 625                 switch ( $mode ) {
 626                         case 'clear':
 627                         case self::EDIT_CLEAR:
 628                         case 'raw':
 629                         case self::EDIT_RAW:
 630                                 return self::EDIT_RAW;
 631                         case 'edit':
 632                         case self::EDIT_NORMAL:
 633                                 return self::EDIT_NORMAL;
 634                         default:
 635                                 return false;
 636                 }
 637         }
 638
 639         /**
 640          * Build a set of links for convenient navigation
 641          * between watchlist viewing and editing modes
 642          *
 643          * @param null $unused
 644          * @return string
 645          */
 646         public static function buildTools( $unused ) {
 647                 global $wgLang;
 648
 649                 $tools = array();
 650                 $modes = array(
 651                         'view' => array( 'Watchlist', false ),
 652                         'edit' => array( 'EditWatchlist', false ),
 653                         'raw' => array( 'EditWatchlist', 'raw' ),
 654                 );
 655
 656                 foreach ( $modes as $mode => $arr ) {
 657                         // can use messages 'watchlisttools-view', 'watchlisttools-edit', 'watchlisttools-raw'
 658                         $tools[] = Linker::linkKnown(
 659                                 SpecialPage::getTitleFor( $arr[0], $arr[1] ),
 660                                 wfMessage( "watchlisttools-{$mode}" )->escaped()
 661                         );
 662                 }
 663
 664                 return Html::rawElement(
 665                         'span',
 666                         array( 'class' => 'mw-watchlist-toollinks' ),
 667                         wfMessage( 'parentheses', $wgLang->pipeList( $tools ) )->text()
 668                 );
 669         }
 670 }
 671
 672 # B/C since 1.18
 673 class WatchlistEditor extends SpecialEditWatchlist {
 674 }
 675
 676 /**
 677  * Extend HTMLForm purely so we can have a more sane way of getting the section headers
 678  */
 679 class EditWatchlistNormalHTMLForm extends HTMLForm {
 680         public function getLegend( $namespace ) {
 681                 $namespace = substr( $namespace, 2 );
 682
 683                 return $namespace == NS_MAIN
 684                         ? $this->msg( 'blanknamespace' )->escaped()
 685                         : htmlspecialchars( $this->getContext()->getLanguage()->getFormattedNsText( $namespace ) );
 686         }
 687
 688         public function getBody() {
 689                 return $this->displaySection( $this->mFieldTree, '', 'editwatchlist-' );
 690         }
 691 }
 692
 693 class EditWatchlistCheckboxSeriesField extends HTMLMultiSelectField {
 694         /**
 695          * HTMLMultiSelectField throws validation errors if we get input data
 696          * that doesn't match the data set in the form setup. This causes
 697          * problems if something gets removed from the watchlist while the
 698          * form is open (bug 32126), but we know that invalid items will
 699          * be harmless so we can override it here.
 700          *
 701          * @param string $value the value the field was submitted with
 702          * @param array $alldata the data collected from the form
 703          * @return bool|string Bool true on success, or String error to display.
 704          */
 705         function validate( $value, $alldata ) {
 706                 // Need to call into grandparent to be a good citizen. :)
 707                 return HTMLFormField::validate( $value, $alldata );
 708         }
 709 }