includes/EditPage.php

   1 <?php
   2 /**
   3  * User interface for page editing.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 use MediaWiki\Logger\LoggerFactory;
  24 use MediaWiki\MediaWikiServices;
  25 use Wikimedia\ScopedCallback;
  26
  27 /**
  28  * The edit page/HTML interface (split from Article)
  29  * The actual database and text munging is still in Article,
  30  * but it should get easier to call those from alternate
  31  * interfaces.
  32  *
  33  * EditPage cares about two distinct titles:
  34  * $this->mContextTitle is the page that forms submit to, links point to,
  35  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  36  * page in the database that is actually being edited. These are
  37  * usually the same, but they are now allowed to be different.
  38  *
  39  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  40  * headaches, which may be fatal.
  41  */
  42 class EditPage {
  43         /**
  44          * Status: Article successfully updated
  45          */
  46         const AS_SUCCESS_UPDATE = 200;
  47
  48         /**
  49          * Status: Article successfully created
  50          */
  51         const AS_SUCCESS_NEW_ARTICLE = 201;
  52
  53         /**
  54          * Status: Article update aborted by a hook function
  55          */
  56         const AS_HOOK_ERROR = 210;
  57
  58         /**
  59          * Status: A hook function returned an error
  60          */
  61         const AS_HOOK_ERROR_EXPECTED = 212;
  62
  63         /**
  64          * Status: User is blocked from editing this page
  65          */
  66         const AS_BLOCKED_PAGE_FOR_USER = 215;
  67
  68         /**
  69          * Status: Content too big (> $wgMaxArticleSize)
  70          */
  71         const AS_CONTENT_TOO_BIG = 216;
  72
  73         /**
  74          * Status: this anonymous user is not allowed to edit this page
  75          */
  76         const AS_READ_ONLY_PAGE_ANON = 218;
  77
  78         /**
  79          * Status: this logged in user is not allowed to edit this page
  80          */
  81         const AS_READ_ONLY_PAGE_LOGGED = 219;
  82
  83         /**
  84          * Status: wiki is in readonly mode (wfReadOnly() == true)
  85          */
  86         const AS_READ_ONLY_PAGE = 220;
  87
  88         /**
  89          * Status: rate limiter for action 'edit' was tripped
  90          */
  91         const AS_RATE_LIMITED = 221;
  92
  93         /**
  94          * Status: article was deleted while editing and param wpRecreate == false or form
  95          * was not posted
  96          */
  97         const AS_ARTICLE_WAS_DELETED = 222;
  98
  99         /**
 100          * Status: user tried to create this page, but is not allowed to do that
 101          * ( Title->userCan('create') == false )
 102          */
 103         const AS_NO_CREATE_PERMISSION = 223;
 104
 105         /**
 106          * Status: user tried to create a blank page and wpIgnoreBlankArticle == false
 107          */
 108         const AS_BLANK_ARTICLE = 224;
 109
 110         /**
 111          * Status: (non-resolvable) edit conflict
 112          */
 113         const AS_CONFLICT_DETECTED = 225;
 114
 115         /**
 116          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 117          * editing in his own userspace or talkspace and wpIgnoreBlankSummary == false
 118          */
 119         const AS_SUMMARY_NEEDED = 226;
 120
 121         /**
 122          * Status: user tried to create a new section without content
 123          */
 124         const AS_TEXTBOX_EMPTY = 228;
 125
 126         /**
 127          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 128          */
 129         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 130
 131         /**
 132          * Status: WikiPage::doEdit() was unsuccessful
 133          */
 134         const AS_END = 231;
 135
 136         /**
 137          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 138          */
 139         const AS_SPAM_ERROR = 232;
 140
 141         /**
 142          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 143          */
 144         const AS_IMAGE_REDIRECT_ANON = 233;
 145
 146         /**
 147          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 148          */
 149         const AS_IMAGE_REDIRECT_LOGGED = 234;
 150
 151         /**
 152          * Status: user tried to modify the content model, but is not allowed to do that
 153          * ( User::isAllowed('editcontentmodel') == false )
 154          */
 155         const AS_NO_CHANGE_CONTENT_MODEL = 235;
 156
 157         /**
 158          * Status: user tried to create self-redirect (redirect to the same article) and
 159          * wpIgnoreSelfRedirect == false
 160          */
 161         const AS_SELF_REDIRECT = 236;
 162
 163         /**
 164          * Status: an error relating to change tagging. Look at the message key for
 165          * more details
 166          */
 167         const AS_CHANGE_TAG_ERROR = 237;
 168
 169         /**
 170          * Status: can't parse content
 171          */
 172         const AS_PARSE_ERROR = 240;
 173
 174         /**
 175          * Status: when changing the content model is disallowed due to
 176          * $wgContentHandlerUseDB being false
 177          */
 178         const AS_CANNOT_USE_CUSTOM_MODEL = 241;
 179
 180         /**
 181          * HTML id and name for the beginning of the edit form.
 182          */
 183         const EDITFORM_ID = 'editform';
 184
 185         /**
 186          * Prefix of key for cookie used to pass post-edit state.
 187          * The revision id edited is added after this
 188          */
 189         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 190
 191         /**
 192          * Duration of PostEdit cookie, in seconds.
 193          * The cookie will be removed instantly if the JavaScript runs.
 194          *
 195          * Otherwise, though, we don't want the cookies to accumulate.
 196          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible
 197          * limit of only 20 cookies per domain. This still applies at least to some
 198          * versions of IE without full updates:
 199          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 200          *
 201          * A value of 20 minutes should be enough to take into account slow loads and minor
 202          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 203          */
 204         const POST_EDIT_COOKIE_DURATION = 1200;
 205
 206         /** @var Article */
 207         public $mArticle;
 208         /** @var WikiPage */
 209         private $page;
 210
 211         /** @var Title */
 212         public $mTitle;
 213
 214         /** @var null|Title */
 215         private $mContextTitle = null;
 216
 217         /** @var string */
 218         public $action = 'submit';
 219
 220         /** @var bool */
 221         public $isConflict = false;
 222
 223         /** @var bool */
 224         public $isCssJsSubpage = false;
 225
 226         /** @var bool */
 227         public $isCssSubpage = false;
 228
 229         /** @var bool */
 230         public $isJsSubpage = false;
 231
 232         /** @var bool */
 233         public $isWrongCaseCssJsPage = false;
 234
 235         /** @var bool New page or new section */
 236         public $isNew = false;
 237
 238         /** @var bool */
 239         public $deletedSinceEdit;
 240
 241         /** @var string */
 242         public $formtype;
 243
 244         /** @var bool */
 245         public $firsttime;
 246
 247         /** @var bool|stdClass */
 248         public $lastDelete;
 249
 250         /** @var bool */
 251         public $mTokenOk = false;
 252
 253         /** @var bool */
 254         public $mTokenOkExceptSuffix = false;
 255
 256         /** @var bool */
 257         public $mTriedSave = false;
 258
 259         /** @var bool */
 260         public $incompleteForm = false;
 261
 262         /** @var bool */
 263         public $tooBig = false;
 264
 265         /** @var bool */
 266         public $missingComment = false;
 267
 268         /** @var bool */
 269         public $missingSummary = false;
 270
 271         /** @var bool */
 272         public $allowBlankSummary = false;
 273
 274         /** @var bool */
 275         protected $blankArticle = false;
 276
 277         /** @var bool */
 278         protected $allowBlankArticle = false;
 279
 280         /** @var bool */
 281         protected $selfRedirect = false;
 282
 283         /** @var bool */
 284         protected $allowSelfRedirect = false;
 285
 286         /** @var string */
 287         public $autoSumm = '';
 288
 289         /** @var string */
 290         public $hookError = '';
 291
 292         /** @var ParserOutput */
 293         public $mParserOutput;
 294
 295         /** @var bool Has a summary been preset using GET parameter &summary= ? */
 296         public $hasPresetSummary = false;
 297
 298         /** @var Revision|bool */
 299         public $mBaseRevision = false;
 300
 301         /** @var bool */
 302         public $mShowSummaryField = true;
 303
 304         # Form values
 305
 306         /** @var bool */
 307         public $save = false;
 308
 309         /** @var bool */
 310         public $preview = false;
 311
 312         /** @var bool */
 313         public $diff = false;
 314
 315         /** @var bool */
 316         public $minoredit = false;
 317
 318         /** @var bool */
 319         public $watchthis = false;
 320
 321         /** @var bool */
 322         public $recreate = false;
 323
 324         /** @var string */
 325         public $textbox1 = '';
 326
 327         /** @var string */
 328         public $textbox2 = '';
 329
 330         /** @var string */
 331         public $summary = '';
 332
 333         /** @var bool */
 334         public $nosummary = false;
 335
 336         /** @var string */
 337         public $edittime = '';
 338
 339         /** @var int */
 340         private $editRevId = null;
 341
 342         /** @var string */
 343         public $section = '';
 344
 345         /** @var string */
 346         public $sectiontitle = '';
 347
 348         /** @var string */
 349         public $starttime = '';
 350
 351         /** @var int */
 352         public $oldid = 0;
 353
 354         /** @var int */
 355         public $parentRevId = 0;
 356
 357         /** @var string */
 358         public $editintro = '';
 359
 360         /** @var null */
 361         public $scrolltop = null;
 362
 363         /** @var bool */
 364         public $bot = true;
 365
 366         /** @var string */
 367         public $contentModel;
 368
 369         /** @var null|string */
 370         public $contentFormat = null;
 371
 372         /** @var null|array */
 373         private $changeTags = null;
 374
 375         # Placeholders for text injection by hooks (must be HTML)
 376         # extensions should take care to _append_ to the present value
 377
 378         /** @var string Before even the preview */
 379         public $editFormPageTop = '';
 380         public $editFormTextTop = '';
 381         public $editFormTextBeforeContent = '';
 382         public $editFormTextAfterWarn = '';
 383         public $editFormTextAfterTools = '';
 384         public $editFormTextBottom = '';
 385         public $editFormTextAfterContent = '';
 386         public $previewTextAfterContent = '';
 387         public $mPreloadContent = null;
 388
 389         /* $didSave should be set to true whenever an article was successfully altered. */
 390         public $didSave = false;
 391         public $undidRev = 0;
 392
 393         public $suppressIntro = false;
 394
 395         /** @var bool */
 396         protected $edit;
 397
 398         /** @var bool|int */
 399         protected $contentLength = false;
 400
 401         /**
 402          * @var bool Set in ApiEditPage, based on ContentHandler::allowsDirectApiEditing
 403          */
 404         private $enableApiEditOverride = false;
 405
 406         /**
 407          * @var IContextSource
 408          */
 409         protected $context;
 410
 411         /**
 412          * @var bool Whether an old revision is edited
 413          */
 414         private $isOldRev = false;
 415
 416         /**
 417          * @param Article $article
 418          */
 419         public function __construct( Article $article ) {
 420                 $this->mArticle = $article;
 421                 $this->page = $article->getPage(); // model object
 422                 $this->mTitle = $article->getTitle();
 423                 $this->context = $article->getContext();
 424
 425                 $this->contentModel = $this->mTitle->getContentModel();
 426
 427                 $handler = ContentHandler::getForModelID( $this->contentModel );
 428                 $this->contentFormat = $handler->getDefaultFormat();
 429         }
 430
 431         /**
 432          * @return Article
 433          */
 434         public function getArticle() {
 435                 return $this->mArticle;
 436         }
 437
 438         /**
 439          * @since 1.28
 440          * @return IContextSource
 441          */
 442         public function getContext() {
 443                 return $this->context;
 444         }
 445
 446         /**
 447          * @since 1.19
 448          * @return Title
 449          */
 450         public function getTitle() {
 451                 return $this->mTitle;
 452         }
 453
 454         /**
 455          * Set the context Title object
 456          *
 457          * @param Title|null $title Title object or null
 458          */
 459         public function setContextTitle( $title ) {
 460                 $this->mContextTitle = $title;
 461         }
 462
 463         /**
 464          * Get the context title object.
 465          * If not set, $wgTitle will be returned. This behavior might change in
 466          * the future to return $this->mTitle instead.
 467          *
 468          * @return Title
 469          */
 470         public function getContextTitle() {
 471                 if ( is_null( $this->mContextTitle ) ) {
 472                         global $wgTitle;
 473                         return $wgTitle;
 474                 } else {
 475                         return $this->mContextTitle;
 476                 }
 477         }
 478
 479         /**
 480          * Check if the edit page is using OOUI controls
 481          * @return bool Always true
 482          * @deprecated since 1.30
 483          */
 484         public function isOouiEnabled() {
 485                 return true;
 486         }
 487
 488         /**
 489          * Returns if the given content model is editable.
 490          *
 491          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 492          * @return bool
 493          * @throws MWException If $modelId has no known handler
 494          */
 495         public function isSupportedContentModel( $modelId ) {
 496                 return $this->enableApiEditOverride === true ||
 497                         ContentHandler::getForModelID( $modelId )->supportsDirectEditing();
 498         }
 499
 500         /**
 501          * Allow editing of content that supports API direct editing, but not general
 502          * direct editing. Set to false by default.
 503          *
 504          * @param bool $enableOverride
 505          */
 506         public function setApiEditOverride( $enableOverride ) {
 507                 $this->enableApiEditOverride = $enableOverride;
 508         }
 509
 510         /**
 511          * @deprecated since 1.29, call edit directly
 512          */
 513         public function submit() {
 514                 $this->edit();
 515         }
 516
 517         /**
 518          * This is the function that gets called for "action=edit". It
 519          * sets up various member variables, then passes execution to
 520          * another function, usually showEditForm()
 521          *
 522          * The edit form is self-submitting, so that when things like
 523          * preview and edit conflicts occur, we get the same form back
 524          * with the extra stuff added.  Only when the final submission
 525          * is made and all is well do we actually save and redirect to
 526          * the newly-edited page.
 527          */
 528         public function edit() {
 529                 global $wgOut, $wgRequest, $wgUser;
 530                 // Allow extensions to modify/prevent this form or submission
 531                 if ( !Hooks::run( 'AlternateEdit', [ $this ] ) ) {
 532                         return;
 533                 }
 534
 535                 wfDebug( __METHOD__ . ": enter\n" );
 536
 537                 // If they used redlink=1 and the page exists, redirect to the main article
 538                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 539                         $wgOut->redirect( $this->mTitle->getFullURL() );
 540                         return;
 541                 }
 542
 543                 $this->importFormData( $wgRequest );
 544                 $this->firsttime = false;
 545
 546                 if ( wfReadOnly() && $this->save ) {
 547                         // Force preview
 548                         $this->save = false;
 549                         $this->preview = true;
 550                 }
 551
 552                 if ( $this->save ) {
 553                         $this->formtype = 'save';
 554                 } elseif ( $this->preview ) {
 555                         $this->formtype = 'preview';
 556                 } elseif ( $this->diff ) {
 557                         $this->formtype = 'diff';
 558                 } else { # First time through
 559                         $this->firsttime = true;
 560                         if ( $this->previewOnOpen() ) {
 561                                 $this->formtype = 'preview';
 562                         } else {
 563                                 $this->formtype = 'initial';
 564                         }
 565                 }
 566
 567                 $permErrors = $this->getEditPermissionErrors( $this->save ? 'secure' : 'full' );
 568                 if ( $permErrors ) {
 569                         wfDebug( __METHOD__ . ": User can't edit\n" );
 570                         // Auto-block user's IP if the account was "hard" blocked
 571                         if ( !wfReadOnly() ) {
 572                                 $user = $wgUser;
 573                                 DeferredUpdates::addCallableUpdate( function () use ( $user ) {
 574                                         $user->spreadAnyEditBlock();
 575                                 } );
 576                         }
 577                         $this->displayPermissionsError( $permErrors );
 578
 579                         return;
 580                 }
 581
 582                 $revision = $this->mArticle->getRevisionFetched();
 583                 // Disallow editing revisions with content models different from the current one
 584                 // Undo edits being an exception in order to allow reverting content model changes.
 585                 if ( $revision
 586                         && $revision->getContentModel() !== $this->contentModel
 587                 ) {
 588                         $prevRev = null;
 589                         if ( $this->undidRev ) {
 590                                 $undidRevObj = Revision::newFromId( $this->undidRev );
 591                                 $prevRev = $undidRevObj ? $undidRevObj->getPrevious() : null;
 592                         }
 593                         if ( !$this->undidRev
 594                                 || !$prevRev
 595                                 || $prevRev->getContentModel() !== $this->contentModel
 596                         ) {
 597                                 $this->displayViewSourcePage(
 598                                         $this->getContentObject(),
 599                                         $this->context->msg(
 600                                                 'contentmodelediterror',
 601                                                 $revision->getContentModel(),
 602                                                 $this->contentModel
 603                                         )->plain()
 604                                 );
 605                                 return;
 606                         }
 607                 }
 608
 609                 $this->isConflict = false;
 610                 // css / js subpages of user pages get a special treatment
 611                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 612                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 613                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 614                 // @todo FIXME: Silly assignment.
 615                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 616
 617                 # Show applicable editing introductions
 618                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 619                         $this->showIntro();
 620                 }
 621
 622                 # Attempt submission here.  This will check for edit conflicts,
 623                 # and redundantly check for locked database, blocked IPs, etc.
 624                 # that edit() already checked just in case someone tries to sneak
 625                 # in the back door with a hand-edited submission URL.
 626
 627                 if ( 'save' == $this->formtype ) {
 628                         $resultDetails = null;
 629                         $status = $this->attemptSave( $resultDetails );
 630                         if ( !$this->handleStatus( $status, $resultDetails ) ) {
 631                                 return;
 632                         }
 633                 }
 634
 635                 # First time through: get contents, set time for conflict
 636                 # checking, etc.
 637                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 638                         if ( $this->initialiseForm() === false ) {
 639                                 $this->noSuchSectionPage();
 640                                 return;
 641                         }
 642
 643                         if ( !$this->mTitle->getArticleID() ) {
 644                                 Hooks::run( 'EditFormPreloadText', [ &$this->textbox1, &$this->mTitle ] );
 645                         } else {
 646                                 Hooks::run( 'EditFormInitialText', [ $this ] );
 647                         }
 648
 649                 }
 650
 651                 $this->showEditForm();
 652         }
 653
 654         /**
 655          * @param string $rigor Same format as Title::getUserPermissionErrors()
 656          * @return array
 657          */
 658         protected function getEditPermissionErrors( $rigor = 'secure' ) {
 659                 global $wgUser;
 660
 661                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser, $rigor );
 662                 # Can this title be created?
 663                 if ( !$this->mTitle->exists() ) {
 664                         $permErrors = array_merge(
 665                                 $permErrors,
 666                                 wfArrayDiff2(
 667                                         $this->mTitle->getUserPermissionsErrors( 'create', $wgUser, $rigor ),
 668                                         $permErrors
 669                                 )
 670                         );
 671                 }
 672                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 673                 $remove = [];
 674                 foreach ( $permErrors as $error ) {
 675                         if ( ( $this->preview || $this->diff )
 676                                 && (
 677                                         $error[0] == 'blockedtext' ||
 678                                         $error[0] == 'autoblockedtext' ||
 679                                         $error[0] == 'systemblockedtext'
 680                                 )
 681                         ) {
 682                                 $remove[] = $error;
 683                         }
 684                 }
 685                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 686
 687                 return $permErrors;
 688         }
 689
 690         /**
 691          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 692          * but with the following differences:
 693          * - If redlink=1, the user will be redirected to the page
 694          * - If there is content to display or the error occurs while either saving,
 695          *   previewing or showing the difference, it will be a
 696          *   "View source for ..." page displaying the source code after the error message.
 697          *
 698          * @since 1.19
 699          * @param array $permErrors Array of permissions errors, as returned by
 700          *    Title::getUserPermissionsErrors().
 701          * @throws PermissionsError
 702          */
 703         protected function displayPermissionsError( array $permErrors ) {
 704                 global $wgRequest, $wgOut;
 705
 706                 if ( $wgRequest->getBool( 'redlink' ) ) {
 707                         // The edit page was reached via a red link.
 708                         // Redirect to the article page and let them click the edit tab if
 709                         // they really want a permission error.
 710                         $wgOut->redirect( $this->mTitle->getFullURL() );
 711                         return;
 712                 }
 713
 714                 $content = $this->getContentObject();
 715
 716                 # Use the normal message if there's nothing to display
 717                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 718                         $action = $this->mTitle->exists() ? 'edit' :
 719                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 720                         throw new PermissionsError( $action, $permErrors );
 721                 }
 722
 723                 $this->displayViewSourcePage(
 724                         $content,
 725                         $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' )
 726                 );
 727         }
 728
 729         /**
 730          * Display a read-only View Source page
 731          * @param Content $content content object
 732          * @param string $errorMessage additional wikitext error message to display
 733          */
 734         protected function displayViewSourcePage( Content $content, $errorMessage = '' ) {
 735                 global $wgOut;
 736
 737                 Hooks::run( 'EditPage::showReadOnlyForm:initial', [ $this, &$wgOut ] );
 738
 739                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 740                 $wgOut->setPageTitle( $this->context->msg(
 741                         'viewsource-title',
 742                         $this->getContextTitle()->getPrefixedText()
 743                 ) );
 744                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 745                 $wgOut->addHTML( $this->editFormPageTop );
 746                 $wgOut->addHTML( $this->editFormTextTop );
 747
 748                 if ( $errorMessage !== '' ) {
 749                         $wgOut->addWikiText( $errorMessage );
 750                         $wgOut->addHTML( "<hr />\n" );
 751                 }
 752
 753                 # If the user made changes, preserve them when showing the markup
 754                 # (This happens when a user is blocked during edit, for instance)
 755                 if ( !$this->firsttime ) {
 756                         $text = $this->textbox1;
 757                         $wgOut->addWikiMsg( 'viewyourtext' );
 758                 } else {
 759                         try {
 760                                 $text = $this->toEditText( $content );
 761                         } catch ( MWException $e ) {
 762                                 # Serialize using the default format if the content model is not supported
 763                                 # (e.g. for an old revision with a different model)
 764                                 $text = $content->serialize();
 765                         }
 766                         $wgOut->addWikiMsg( 'viewsourcetext' );
 767                 }
 768
 769                 $wgOut->addHTML( $this->editFormTextBeforeContent );
 770                 $this->showTextbox( $text, 'wpTextbox1', [ 'readonly' ] );
 771                 $wgOut->addHTML( $this->editFormTextAfterContent );
 772
 773                 $wgOut->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
 774
 775                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 776
 777                 $wgOut->addHTML( $this->editFormTextBottom );
 778                 if ( $this->mTitle->exists() ) {
 779                         $wgOut->returnToMain( null, $this->mTitle );
 780                 }
 781         }
 782
 783         /**
 784          * Should we show a preview when the edit form is first shown?
 785          *
 786          * @return bool
 787          */
 788         protected function previewOnOpen() {
 789                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 790                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 791                         // Explicit override from request
 792                         return true;
 793                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 794                         // Explicit override from request
 795                         return false;
 796                 } elseif ( $this->section == 'new' ) {
 797                         // Nothing *to* preview for new sections
 798                         return false;
 799                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 800                         && $wgUser->getOption( 'previewonfirst' )
 801                 ) {
 802                         // Standard preference behavior
 803                         return true;
 804                 } elseif ( !$this->mTitle->exists()
 805                         && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 806                         && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
 807                 ) {
 808                         // Categories are special
 809                         return true;
 810                 } else {
 811                         return false;
 812                 }
 813         }
 814
 815         /**
 816          * Checks whether the user entered a skin name in uppercase,
 817          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 818          *
 819          * @return bool
 820          */
 821         protected function isWrongCaseCssJsPage() {
 822                 if ( $this->mTitle->isCssJsSubpage() ) {
 823                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 824                         $skins = array_merge(
 825                                 array_keys( Skin::getSkinNames() ),
 826                                 [ 'common' ]
 827                         );
 828                         return !in_array( $name, $skins )
 829                                 && in_array( strtolower( $name ), $skins );
 830                 } else {
 831                         return false;
 832                 }
 833         }
 834
 835         /**
 836          * Returns whether section editing is supported for the current page.
 837          * Subclasses may override this to replace the default behavior, which is
 838          * to check ContentHandler::supportsSections.
 839          *
 840          * @return bool True if this edit page supports sections, false otherwise.
 841          */
 842         protected function isSectionEditSupported() {
 843                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 844                 return $contentHandler->supportsSections();
 845         }
 846
 847         /**
 848          * This function collects the form data and uses it to populate various member variables.
 849          * @param WebRequest &$request
 850          * @throws ErrorPageError
 851          */
 852         public function importFormData( &$request ) {
 853                 global $wgContLang, $wgUser;
 854
 855                 # Section edit can come from either the form or a link
 856                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 857
 858                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 859                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 860                 }
 861
 862                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 863
 864                 if ( $request->wasPosted() ) {
 865                         # These fields need to be checked for encoding.
 866                         # Also remove trailing whitespace, but don't remove _initial_
 867                         # whitespace from the text boxes. This may be significant formatting.
 868                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 869                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 870                                 // Skip this if wpTextbox2 has input, it indicates that we came
 871                                 // from a conflict page with raw page text, not a custom form
 872                                 // modified by subclasses
 873                                 $textbox1 = $this->importContentFormData( $request );
 874                                 if ( $textbox1 !== null ) {
 875                                         $this->textbox1 = $textbox1;
 876                                 }
 877                         }
 878
 879                         # Truncate for whole multibyte characters
 880                         $this->summary = $wgContLang->truncate( $request->getText( 'wpSummary' ), 255 );
 881
 882                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 883                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 884                         # section titles.
 885                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 886
 887                         # Treat sectiontitle the same way as summary.
 888                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 889                         # currently doing double duty as both edit summary and section title. Right now this
 890                         # is just to allow API edits to work around this limitation, but this should be
 891                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 892                         $this->sectiontitle = $wgContLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 893                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 894
 895                         $this->edittime = $request->getVal( 'wpEdittime' );
 896                         $this->editRevId = $request->getIntOrNull( 'editRevId' );
 897                         $this->starttime = $request->getVal( 'wpStarttime' );
 898
 899                         $undidRev = $request->getInt( 'wpUndidRevision' );
 900                         if ( $undidRev ) {
 901                                 $this->undidRev = $undidRev;
 902                         }
 903
 904                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 905
 906                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 907                                 // wpTextbox1 field is missing, possibly due to being "too big"
 908                                 // according to some filter rules such as Suhosin's setting for
 909                                 // suhosin.request.max_value_length (d'oh)
 910                                 $this->incompleteForm = true;
 911                         } else {
 912                                 // If we receive the last parameter of the request, we can fairly
 913                                 // claim the POST request has not been truncated.
 914
 915                                 // TODO: softened the check for cutover.  Once we determine
 916                                 // that it is safe, we should complete the transition by
 917                                 // removing the "edittime" clause.
 918                                 $this->incompleteForm = ( !$request->getVal( 'wpUltimateParam' )
 919                                         && is_null( $this->edittime ) );
 920                         }
 921                         if ( $this->incompleteForm ) {
 922                                 # If the form is incomplete, force to preview.
 923                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 924                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 925                                 $this->preview = true;
 926                         } else {
 927                                 $this->preview = $request->getCheck( 'wpPreview' );
 928                                 $this->diff = $request->getCheck( 'wpDiff' );
 929
 930                                 // Remember whether a save was requested, so we can indicate
 931                                 // if we forced preview due to session failure.
 932                                 $this->mTriedSave = !$this->preview;
 933
 934                                 if ( $this->tokenOk( $request ) ) {
 935                                         # Some browsers will not report any submit button
 936                                         # if the user hits enter in the comment box.
 937                                         # The unmarked state will be assumed to be a save,
 938                                         # if the form seems otherwise complete.
 939                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 940                                 } elseif ( $this->diff ) {
 941                                         # Failed token check, but only requested "Show Changes".
 942                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 943                                 } else {
 944                                         # Page might be a hack attempt posted from
 945                                         # an external site. Preview instead of saving.
 946                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 947                                         $this->preview = true;
 948                                 }
 949                         }
 950                         $this->save = !$this->preview && !$this->diff;
 951                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 952                                 $this->edittime = null;
 953                         }
 954
 955                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 956                                 $this->starttime = null;
 957                         }
 958
 959                         $this->recreate = $request->getCheck( 'wpRecreate' );
 960
 961                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 962                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 963
 964                         # Don't force edit summaries when a user is editing their own user or talk page
 965                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 966                                 && $this->mTitle->getText() == $wgUser->getName()
 967                         ) {
 968                                 $this->allowBlankSummary = true;
 969                         } else {
 970                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
 971                                         || !$wgUser->getOption( 'forceeditsummary' );
 972                         }
 973
 974                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 975
 976                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
 977                         $this->allowSelfRedirect = $request->getBool( 'wpIgnoreSelfRedirect' );
 978
 979                         $changeTags = $request->getVal( 'wpChangeTags' );
 980                         if ( is_null( $changeTags ) || $changeTags === '' ) {
 981                                 $this->changeTags = [];
 982                         } else {
 983                                 $this->changeTags = array_filter( array_map( 'trim', explode( ',',
 984                                         $changeTags ) ) );
 985                         }
 986                 } else {
 987                         # Not a posted form? Start with nothing.
 988                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 989                         $this->textbox1 = '';
 990                         $this->summary = '';
 991                         $this->sectiontitle = '';
 992                         $this->edittime = '';
 993                         $this->editRevId = null;
 994                         $this->starttime = wfTimestampNow();
 995                         $this->edit = false;
 996                         $this->preview = false;
 997                         $this->save = false;
 998                         $this->diff = false;
 999                         $this->minoredit = false;
1000                         // Watch may be overridden by request parameters
1001                         $this->watchthis = $request->getBool( 'watchthis', false );
1002                         $this->recreate = false;
1003
1004                         // When creating a new section, we can preload a section title by passing it as the
1005                         // preloadtitle parameter in the URL (T15100)
1006                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
1007                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
1008                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
1009                                 $this->summary = $request->getVal( 'preloadtitle' );
1010                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
1011                                 $this->summary = $request->getText( 'summary' );
1012                                 if ( $this->summary !== '' ) {
1013                                         $this->hasPresetSummary = true;
1014                                 }
1015                         }
1016
1017                         if ( $request->getVal( 'minor' ) ) {
1018                                 $this->minoredit = true;
1019                         }
1020                 }
1021
1022                 $this->oldid = $request->getInt( 'oldid' );
1023                 $this->parentRevId = $request->getInt( 'parentRevId' );
1024
1025                 $this->bot = $request->getBool( 'bot', true );
1026                 $this->nosummary = $request->getBool( 'nosummary' );
1027
1028                 // May be overridden by revision.
1029                 $this->contentModel = $request->getText( 'model', $this->contentModel );
1030                 // May be overridden by revision.
1031                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
1032
1033                 try {
1034                         $handler = ContentHandler::getForModelID( $this->contentModel );
1035                 } catch ( MWUnknownContentModelException $e ) {
1036                         throw new ErrorPageError(
1037                                 'editpage-invalidcontentmodel-title',
1038                                 'editpage-invalidcontentmodel-text',
1039                                 [ wfEscapeWikiText( $this->contentModel ) ]
1040                         );
1041                 }
1042
1043                 if ( !$handler->isSupportedFormat( $this->contentFormat ) ) {
1044                         throw new ErrorPageError(
1045                                 'editpage-notsupportedcontentformat-title',
1046                                 'editpage-notsupportedcontentformat-text',
1047                                 [
1048                                         wfEscapeWikiText( $this->contentFormat ),
1049                                         wfEscapeWikiText( ContentHandler::getLocalizedName( $this->contentModel ) )
1050                                 ]
1051                         );
1052                 }
1053
1054                 /**
1055                  * @todo Check if the desired model is allowed in this namespace, and if
1056                  *   a transition from the page's current model to the new model is
1057                  *   allowed.
1058                  */
1059
1060                 $this->editintro = $request->getText( 'editintro',
1061                         // Custom edit intro for new sections
1062                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
1063
1064                 // Allow extensions to modify form data
1065                 Hooks::run( 'EditPage::importFormData', [ $this, $request ] );
1066         }
1067
1068         /**
1069          * Subpage overridable method for extracting the page content data from the
1070          * posted form to be placed in $this->textbox1, if using customized input
1071          * this method should be overridden and return the page text that will be used
1072          * for saving, preview parsing and so on...
1073          *
1074          * @param WebRequest &$request
1075          * @return string|null
1076          */
1077         protected function importContentFormData( &$request ) {
1078                 return; // Don't do anything, EditPage already extracted wpTextbox1
1079         }
1080
1081         /**
1082          * Initialise form fields in the object
1083          * Called on the first invocation, e.g. when a user clicks an edit link
1084          * @return bool If the requested section is valid
1085          */
1086         public function initialiseForm() {
1087                 global $wgUser;
1088                 $this->edittime = $this->page->getTimestamp();
1089                 $this->editRevId = $this->page->getLatest();
1090
1091                 $content = $this->getContentObject( false ); # TODO: track content object?!
1092                 if ( $content === false ) {
1093                         return false;
1094                 }
1095                 $this->textbox1 = $this->toEditText( $content );
1096
1097                 // activate checkboxes if user wants them to be always active
1098                 # Sort out the "watch" checkbox
1099                 if ( $wgUser->getOption( 'watchdefault' ) ) {
1100                         # Watch all edits
1101                         $this->watchthis = true;
1102                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1103                         # Watch creations
1104                         $this->watchthis = true;
1105                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
1106                         # Already watched
1107                         $this->watchthis = true;
1108                 }
1109                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
1110                         $this->minoredit = true;
1111                 }
1112                 if ( $this->textbox1 === false ) {
1113                         return false;
1114                 }
1115                 return true;
1116         }
1117
1118         /**
1119          * @param Content|null $def_content The default value to return
1120          *
1121          * @return Content|null Content on success, $def_content for invalid sections
1122          *
1123          * @since 1.21
1124          */
1125         protected function getContentObject( $def_content = null ) {
1126                 global $wgOut, $wgRequest, $wgUser, $wgContLang;
1127
1128                 $content = false;
1129
1130                 // For message page not locally set, use the i18n message.
1131                 // For other non-existent articles, use preload text if any.
1132                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
1133                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
1134                                 # If this is a system message, get the default text.
1135                                 $msg = $this->mTitle->getDefaultMessageText();
1136
1137                                 $content = $this->toEditContent( $msg );
1138                         }
1139                         if ( $content === false ) {
1140                                 # If requested, preload some text.
1141                                 $preload = $wgRequest->getVal( 'preload',
1142                                         // Custom preload text for new sections
1143                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1144                                 $params = $wgRequest->getArray( 'preloadparams', [] );
1145
1146                                 $content = $this->getPreloadedContent( $preload, $params );
1147                         }
1148                 // For existing pages, get text based on "undo" or section parameters.
1149                 } else {
1150                         if ( $this->section != '' ) {
1151                                 // Get section edit text (returns $def_text for invalid sections)
1152                                 $orig = $this->getOriginalContent( $wgUser );
1153                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1154
1155                                 if ( !$content ) {
1156                                         $content = $def_content;
1157                                 }
1158                         } else {
1159                                 $undoafter = $wgRequest->getInt( 'undoafter' );
1160                                 $undo = $wgRequest->getInt( 'undo' );
1161
1162                                 if ( $undo > 0 && $undoafter > 0 ) {
1163                                         $undorev = Revision::newFromId( $undo );
1164                                         $oldrev = Revision::newFromId( $undoafter );
1165
1166                                         # Sanity check, make sure it's the right page,
1167                                         # the revisions exist and they were not deleted.
1168                                         # Otherwise, $content will be left as-is.
1169                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1170                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1171                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT )
1172                                         ) {
1173                                                 $content = $this->page->getUndoContent( $undorev, $oldrev );
1174
1175                                                 if ( $content === false ) {
1176                                                         # Warn the user that something went wrong
1177                                                         $undoMsg = 'failure';
1178                                                 } else {
1179                                                         $oldContent = $this->page->getContent( Revision::RAW );
1180                                                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
1181                                                         $newContent = $content->preSaveTransform( $this->mTitle, $wgUser, $popts );
1182                                                         if ( $newContent->getModel() !== $oldContent->getModel() ) {
1183                                                                 // The undo may change content
1184                                                                 // model if its reverting the top
1185                                                                 // edit. This can result in
1186                                                                 // mismatched content model/format.
1187                                                                 $this->contentModel = $newContent->getModel();
1188                                                                 $this->contentFormat = $oldrev->getContentFormat();
1189                                                         }
1190
1191                                                         if ( $newContent->equals( $oldContent ) ) {
1192                                                                 # Tell the user that the undo results in no change,
1193                                                                 # i.e. the revisions were already undone.
1194                                                                 $undoMsg = 'nochange';
1195                                                                 $content = false;
1196                                                         } else {
1197                                                                 # Inform the user of our success and set an automatic edit summary
1198                                                                 $undoMsg = 'success';
1199
1200                                                                 # If we just undid one rev, use an autosummary
1201                                                                 $firstrev = $oldrev->getNext();
1202                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1203                                                                         $userText = $undorev->getUserText();
1204                                                                         if ( $userText === '' ) {
1205                                                                                 $undoSummary = $this->context->msg(
1206                                                                                         'undo-summary-username-hidden',
1207                                                                                         $undo
1208                                                                                 )->inContentLanguage()->text();
1209                                                                         } else {
1210                                                                                 $undoSummary = $this->context->msg(
1211                                                                                         'undo-summary',
1212                                                                                         $undo,
1213                                                                                         $userText
1214                                                                                 )->inContentLanguage()->text();
1215                                                                         }
1216                                                                         if ( $this->summary === '' ) {
1217                                                                                 $this->summary = $undoSummary;
1218                                                                         } else {
1219                                                                                 $this->summary = $undoSummary . $this->context->msg( 'colon-separator' )
1220                                                                                         ->inContentLanguage()->text() . $this->summary;
1221                                                                         }
1222                                                                         $this->undidRev = $undo;
1223                                                                 }
1224                                                                 $this->formtype = 'diff';
1225                                                         }
1226                                                 }
1227                                         } else {
1228                                                 // Failed basic sanity checks.
1229                                                 // Older revisions may have been removed since the link
1230                                                 // was created, or we may simply have got bogus input.
1231                                                 $undoMsg = 'norev';
1232                                         }
1233
1234                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1235                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1236                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
1237                                                 $this->context->msg( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1238                                 }
1239
1240                                 if ( $content === false ) {
1241                                         $content = $this->getOriginalContent( $wgUser );
1242                                 }
1243                         }
1244                 }
1245
1246                 return $content;
1247         }
1248
1249         /**
1250          * Get the content of the wanted revision, without section extraction.
1251          *
1252          * The result of this function can be used to compare user's input with
1253          * section replaced in its context (using WikiPage::replaceSectionAtRev())
1254          * to the original text of the edit.
1255          *
1256          * This differs from Article::getContent() that when a missing revision is
1257          * encountered the result will be null and not the
1258          * 'missing-revision' message.
1259          *
1260          * @since 1.19
1261          * @param User $user The user to get the revision for
1262          * @return Content|null
1263          */
1264         private function getOriginalContent( User $user ) {
1265                 if ( $this->section == 'new' ) {
1266                         return $this->getCurrentContent();
1267                 }
1268                 $revision = $this->mArticle->getRevisionFetched();
1269                 if ( $revision === null ) {
1270                         $handler = ContentHandler::getForModelID( $this->contentModel );
1271                         return $handler->makeEmptyContent();
1272                 }
1273                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1274                 return $content;
1275         }
1276
1277         /**
1278          * Get the edit's parent revision ID
1279          *
1280          * The "parent" revision is the ancestor that should be recorded in this
1281          * page's revision history.  It is either the revision ID of the in-memory
1282          * article content, or in the case of a 3-way merge in order to rebase
1283          * across a recoverable edit conflict, the ID of the newer revision to
1284          * which we have rebased this page.
1285          *
1286          * @since 1.27
1287          * @return int Revision ID
1288          */
1289         public function getParentRevId() {
1290                 if ( $this->parentRevId ) {
1291                         return $this->parentRevId;
1292                 } else {
1293                         return $this->mArticle->getRevIdFetched();
1294                 }
1295         }
1296
1297         /**
1298          * Get the current content of the page. This is basically similar to
1299          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1300          * content object is returned instead of null.
1301          *
1302          * @since 1.21
1303          * @return Content
1304          */
1305         protected function getCurrentContent() {
1306                 $rev = $this->page->getRevision();
1307                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1308
1309                 if ( $content === false || $content === null ) {
1310                         $handler = ContentHandler::getForModelID( $this->contentModel );
1311                         return $handler->makeEmptyContent();
1312                 } elseif ( !$this->undidRev ) {
1313                         // Content models should always be the same since we error
1314                         // out if they are different before this point (in ->edit()).
1315                         // The exception being, during an undo, the current revision might
1316                         // differ from the prior revision.
1317                         $logger = LoggerFactory::getInstance( 'editpage' );
1318                         if ( $this->contentModel !== $rev->getContentModel() ) {
1319                                 $logger->warning( "Overriding content model from current edit {prev} to {new}", [
1320                                         'prev' => $this->contentModel,
1321                                         'new' => $rev->getContentModel(),
1322                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1323                                         'method' => __METHOD__
1324                                 ] );
1325                                 $this->contentModel = $rev->getContentModel();
1326                         }
1327
1328                         // Given that the content models should match, the current selected
1329                         // format should be supported.
1330                         if ( !$content->isSupportedFormat( $this->contentFormat ) ) {
1331                                 $logger->warning( "Current revision content format unsupported. Overriding {prev} to {new}", [
1332
1333                                         'prev' => $this->contentFormat,
1334                                         'new' => $rev->getContentFormat(),
1335                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1336                                         'method' => __METHOD__
1337                                 ] );
1338                                 $this->contentFormat = $rev->getContentFormat();
1339                         }
1340                 }
1341                 return $content;
1342         }
1343
1344         /**
1345          * Use this method before edit() to preload some content into the edit box
1346          *
1347          * @param Content $content
1348          *
1349          * @since 1.21
1350          */
1351         public function setPreloadedContent( Content $content ) {
1352                 $this->mPreloadContent = $content;
1353         }
1354
1355         /**
1356          * Get the contents to be preloaded into the box, either set by
1357          * an earlier setPreloadText() or by loading the given page.
1358          *
1359          * @param string $preload Representing the title to preload from.
1360          * @param array $params Parameters to use (interface-message style) in the preloaded text
1361          *
1362          * @return Content
1363          *
1364          * @since 1.21
1365          */
1366         protected function getPreloadedContent( $preload, $params = [] ) {
1367                 global $wgUser;
1368
1369                 if ( !empty( $this->mPreloadContent ) ) {
1370                         return $this->mPreloadContent;
1371                 }
1372
1373                 $handler = ContentHandler::getForModelID( $this->contentModel );
1374
1375                 if ( $preload === '' ) {
1376                         return $handler->makeEmptyContent();
1377                 }
1378
1379                 $title = Title::newFromText( $preload );
1380                 # Check for existence to avoid getting MediaWiki:Noarticletext
1381                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1382                         // TODO: somehow show a warning to the user!
1383                         return $handler->makeEmptyContent();
1384                 }
1385
1386                 $page = WikiPage::factory( $title );
1387                 if ( $page->isRedirect() ) {
1388                         $title = $page->getRedirectTarget();
1389                         # Same as before
1390                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1391                                 // TODO: somehow show a warning to the user!
1392                                 return $handler->makeEmptyContent();
1393                         }
1394                         $page = WikiPage::factory( $title );
1395                 }
1396
1397                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1398                 $content = $page->getContent( Revision::RAW );
1399
1400                 if ( !$content ) {
1401                         // TODO: somehow show a warning to the user!
1402                         return $handler->makeEmptyContent();
1403                 }
1404
1405                 if ( $content->getModel() !== $handler->getModelID() ) {
1406                         $converted = $content->convert( $handler->getModelID() );
1407
1408                         if ( !$converted ) {
1409                                 // TODO: somehow show a warning to the user!
1410                                 wfDebug( "Attempt to preload incompatible content: " .
1411                                         "can't convert " . $content->getModel() .
1412                                         " to " . $handler->getModelID() );
1413
1414                                 return $handler->makeEmptyContent();
1415                         }
1416
1417                         $content = $converted;
1418                 }
1419
1420                 return $content->preloadTransform( $title, $parserOptions, $params );
1421         }
1422
1423         /**
1424          * Make sure the form isn't faking a user's credentials.
1425          *
1426          * @param WebRequest &$request
1427          * @return bool
1428          * @private
1429          */
1430         public function tokenOk( &$request ) {
1431                 global $wgUser;
1432                 $token = $request->getVal( 'wpEditToken' );
1433                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1434                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1435                 return $this->mTokenOk;
1436         }
1437
1438         /**
1439          * Sets post-edit cookie indicating the user just saved a particular revision.
1440          *
1441          * This uses a temporary cookie for each revision ID so separate saves will never
1442          * interfere with each other.
1443          *
1444          * Article::view deletes the cookie on server-side after the redirect and
1445          * converts the value to the global JavaScript variable wgPostEdit.
1446          *
1447          * If the variable were set on the server, it would be cached, which is unwanted
1448          * since the post-edit state should only apply to the load right after the save.
1449          *
1450          * @param int $statusValue The status value (to check for new article status)
1451          */
1452         protected function setPostEditCookie( $statusValue ) {
1453                 $revisionId = $this->page->getLatest();
1454                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1455
1456                 $val = 'saved';
1457                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1458                         $val = 'created';
1459                 } elseif ( $this->oldid ) {
1460                         $val = 'restored';
1461                 }
1462
1463                 $response = RequestContext::getMain()->getRequest()->response();
1464                 $response->setCookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION );
1465         }
1466
1467         /**
1468          * Attempt submission
1469          * @param array|bool &$resultDetails See docs for $result in internalAttemptSave
1470          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1471          * @return Status The resulting status object.
1472          */
1473         public function attemptSave( &$resultDetails = false ) {
1474                 global $wgUser;
1475
1476                 # Allow bots to exempt some edits from bot flagging
1477                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1478                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1479
1480                 Hooks::run( 'EditPage::attemptSave:after', [ $this, $status, $resultDetails ] );
1481
1482                 return $status;
1483         }
1484
1485         /**
1486          * Log when a page was successfully saved after the edit conflict view
1487          */
1488         private function incrementResolvedConflicts() {
1489                 global $wgRequest;
1490
1491                 if ( $wgRequest->getText( 'mode' ) !== 'conflict' ) {
1492                         return;
1493                 }
1494
1495                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
1496                 $stats->increment( 'edit.failures.conflict.resolved' );
1497         }
1498
1499         /**
1500          * Handle status, such as after attempt save
1501          *
1502          * @param Status $status
1503          * @param array|bool $resultDetails
1504          *
1505          * @throws ErrorPageError
1506          * @return bool False, if output is done, true if rest of the form should be displayed
1507          */
1508         private function handleStatus( Status $status, $resultDetails ) {
1509                 global $wgUser, $wgOut;
1510
1511                 /**
1512                  * @todo FIXME: once the interface for internalAttemptSave() is made
1513                  *   nicer, this should use the message in $status
1514                  */
1515                 if ( $status->value == self::AS_SUCCESS_UPDATE
1516                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1517                 ) {
1518                         $this->incrementResolvedConflicts();
1519
1520                         $this->didSave = true;
1521                         if ( !$resultDetails['nullEdit'] ) {
1522                                 $this->setPostEditCookie( $status->value );
1523                         }
1524                 }
1525
1526                 // "wpExtraQueryRedirect" is a hidden input to modify
1527                 // after save URL and is not used by actual edit form
1528                 $request = RequestContext::getMain()->getRequest();
1529                 $extraQueryRedirect = $request->getVal( 'wpExtraQueryRedirect' );
1530
1531                 switch ( $status->value ) {
1532                         case self::AS_HOOK_ERROR_EXPECTED:
1533                         case self::AS_CONTENT_TOO_BIG:
1534                         case self::AS_ARTICLE_WAS_DELETED:
1535                         case self::AS_CONFLICT_DETECTED:
1536                         case self::AS_SUMMARY_NEEDED:
1537                         case self::AS_TEXTBOX_EMPTY:
1538                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1539                         case self::AS_END:
1540                         case self::AS_BLANK_ARTICLE:
1541                         case self::AS_SELF_REDIRECT:
1542                                 return true;
1543
1544                         case self::AS_HOOK_ERROR:
1545                                 return false;
1546
1547                         case self::AS_CANNOT_USE_CUSTOM_MODEL:
1548                         case self::AS_PARSE_ERROR:
1549                                 $wgOut->addWikiText( '<div class="error">' . "\n" . $status->getWikiText() . '</div>' );
1550                                 return true;
1551
1552                         case self::AS_SUCCESS_NEW_ARTICLE:
1553                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1554                                 if ( $extraQueryRedirect ) {
1555                                         if ( $query === '' ) {
1556                                                 $query = $extraQueryRedirect;
1557                                         } else {
1558                                                 $query = $query . '&' . $extraQueryRedirect;
1559                                         }
1560                                 }
1561                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1562                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1563                                 return false;
1564
1565                         case self::AS_SUCCESS_UPDATE:
1566                                 $extraQuery = '';
1567                                 $sectionanchor = $resultDetails['sectionanchor'];
1568
1569                                 // Give extensions a chance to modify URL query on update
1570                                 Hooks::run(
1571                                         'ArticleUpdateBeforeRedirect',
1572                                         [ $this->mArticle, &$sectionanchor, &$extraQuery ]
1573                                 );
1574
1575                                 if ( $resultDetails['redirect'] ) {
1576                                         if ( $extraQuery == '' ) {
1577                                                 $extraQuery = 'redirect=no';
1578                                         } else {
1579                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1580                                         }
1581                                 }
1582                                 if ( $extraQueryRedirect ) {
1583                                         if ( $extraQuery === '' ) {
1584                                                 $extraQuery = $extraQueryRedirect;
1585                                         } else {
1586                                                 $extraQuery = $extraQuery . '&' . $extraQueryRedirect;
1587                                         }
1588                                 }
1589
1590                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1591                                 return false;
1592
1593                         case self::AS_SPAM_ERROR:
1594                                 $this->spamPageWithContent( $resultDetails['spam'] );
1595                                 return false;
1596
1597                         case self::AS_BLOCKED_PAGE_FOR_USER:
1598                                 throw new UserBlockedError( $wgUser->getBlock() );
1599
1600                         case self::AS_IMAGE_REDIRECT_ANON:
1601                         case self::AS_IMAGE_REDIRECT_LOGGED:
1602                                 throw new PermissionsError( 'upload' );
1603
1604                         case self::AS_READ_ONLY_PAGE_ANON:
1605                         case self::AS_READ_ONLY_PAGE_LOGGED:
1606                                 throw new PermissionsError( 'edit' );
1607
1608                         case self::AS_READ_ONLY_PAGE:
1609                                 throw new ReadOnlyError;
1610
1611                         case self::AS_RATE_LIMITED:
1612                                 throw new ThrottledError();
1613
1614                         case self::AS_NO_CREATE_PERMISSION:
1615                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1616                                 throw new PermissionsError( $permission );
1617
1618                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1619                                 throw new PermissionsError( 'editcontentmodel' );
1620
1621                         default:
1622                                 // We don't recognize $status->value. The only way that can happen
1623                                 // is if an extension hook aborted from inside ArticleSave.
1624                                 // Render the status object into $this->hookError
1625                                 // FIXME this sucks, we should just use the Status object throughout
1626                                 $this->hookError = '<div class="error">' ."\n" . $status->getWikiText() .
1627                                         '</div>';
1628                                 return true;
1629                 }
1630         }
1631
1632         /**
1633          * Run hooks that can filter edits just before they get saved.
1634          *
1635          * @param Content $content The Content to filter.
1636          * @param Status $status For reporting the outcome to the caller
1637          * @param User $user The user performing the edit
1638          *
1639          * @return bool
1640          */
1641         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1642                 // Run old style post-section-merge edit filter
1643                 if ( $this->hookError != '' ) {
1644                         # ...or the hook could be expecting us to produce an error
1645                         $status->fatal( 'hookaborted' );
1646                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1647                         return false;
1648                 }
1649
1650                 // Run new style post-section-merge edit filter
1651                 if ( !Hooks::run( 'EditFilterMergedContent',
1652                                 [ $this->mArticle->getContext(), $content, $status, $this->summary,
1653                                 $user, $this->minoredit ] )
1654                 ) {
1655                         # Error messages etc. could be handled within the hook...
1656                         if ( $status->isGood() ) {
1657                                 $status->fatal( 'hookaborted' );
1658                                 // Not setting $this->hookError here is a hack to allow the hook
1659                                 // to cause a return to the edit page without $this->hookError
1660                                 // being set. This is used by ConfirmEdit to display a captcha
1661                                 // without any error message cruft.
1662                         } else {
1663                                 $this->hookError = $status->getWikiText();
1664                         }
1665                         // Use the existing $status->value if the hook set it
1666                         if ( !$status->value ) {
1667                                 $status->value = self::AS_HOOK_ERROR;
1668                         }
1669                         return false;
1670                 } elseif ( !$status->isOK() ) {
1671                         # ...or the hook could be expecting us to produce an error
1672                         // FIXME this sucks, we should just use the Status object throughout
1673                         $this->hookError = $status->getWikiText();
1674                         $status->fatal( 'hookaborted' );
1675                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1676                         return false;
1677                 }
1678
1679                 return true;
1680         }
1681
1682         /**
1683          * Return the summary to be used for a new section.
1684          *
1685          * @param string $sectionanchor Set to the section anchor text
1686          * @return string
1687          */
1688         private function newSectionSummary( &$sectionanchor = null ) {
1689                 global $wgParser;
1690
1691                 if ( $this->sectiontitle !== '' ) {
1692                         $sectionanchor = $this->guessSectionName( $this->sectiontitle );
1693                         // If no edit summary was specified, create one automatically from the section
1694                         // title and have it link to the new section. Otherwise, respect the summary as
1695                         // passed.
1696                         if ( $this->summary === '' ) {
1697                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1698                                 return $this->context->msg( 'newsectionsummary' )
1699                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1700                         }
1701                 } elseif ( $this->summary !== '' ) {
1702                         $sectionanchor = $this->guessSectionName( $this->summary );
1703                         # This is a new section, so create a link to the new section
1704                         # in the revision summary.
1705                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1706                         return $this->context->msg( 'newsectionsummary' )
1707                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1708                 }
1709                 return $this->summary;
1710         }
1711
1712         /**
1713          * Attempt submission (no UI)
1714          *
1715          * @param array &$result Array to add statuses to, currently with the
1716          *   possible keys:
1717          *   - spam (string): Spam string from content if any spam is detected by
1718          *     matchSpamRegex.
1719          *   - sectionanchor (string): Section anchor for a section save.
1720          *   - nullEdit (bool): Set if doEditContent is OK.  True if null edit,
1721          *     false otherwise.
1722          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1723          *     revision is a redirect.
1724          * @param bool $bot True if edit is being made under the bot right.
1725          *
1726          * @return Status Status object, possibly with a message, but always with
1727          *   one of the AS_* constants in $status->value,
1728          *
1729          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1730          *   various error display idiosyncrasies. There are also lots of cases
1731          *   where error metadata is set in the object and retrieved later instead
1732          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1733          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1734          * time.
1735          */
1736         public function internalAttemptSave( &$result, $bot = false ) {
1737                 global $wgUser, $wgRequest, $wgMaxArticleSize;
1738                 global $wgContentHandlerUseDB;
1739
1740                 $status = Status::newGood();
1741
1742                 if ( !Hooks::run( 'EditPage::attemptSave', [ $this ] ) ) {
1743                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1744                         $status->fatal( 'hookaborted' );
1745                         $status->value = self::AS_HOOK_ERROR;
1746                         return $status;
1747                 }
1748
1749                 $spam = $wgRequest->getText( 'wpAntispam' );
1750                 if ( $spam !== '' ) {
1751                         wfDebugLog(
1752                                 'SimpleAntiSpam',
1753                                 $wgUser->getName() .
1754                                 ' editing "' .
1755                                 $this->mTitle->getPrefixedText() .
1756                                 '" submitted bogus field "' .
1757                                 $spam .
1758                                 '"'
1759                         );
1760                         $status->fatal( 'spamprotectionmatch', false );
1761                         $status->value = self::AS_SPAM_ERROR;
1762                         return $status;
1763                 }
1764
1765                 try {
1766                         # Construct Content object
1767                         $textbox_content = $this->toEditContent( $this->textbox1 );
1768                 } catch ( MWContentSerializationException $ex ) {
1769                         $status->fatal(
1770                                 'content-failed-to-parse',
1771                                 $this->contentModel,
1772                                 $this->contentFormat,
1773                                 $ex->getMessage()
1774                         );
1775                         $status->value = self::AS_PARSE_ERROR;
1776                         return $status;
1777                 }
1778
1779                 # Check image redirect
1780                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1781                         $textbox_content->isRedirect() &&
1782                         !$wgUser->isAllowed( 'upload' )
1783                 ) {
1784                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1785                                 $status->setResult( false, $code );
1786
1787                                 return $status;
1788                 }
1789
1790                 # Check for spam
1791                 $match = self::matchSummarySpamRegex( $this->summary );
1792                 if ( $match === false && $this->section == 'new' ) {
1793                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1794                         # regular summaries, it is added to the actual wikitext.
1795                         if ( $this->sectiontitle !== '' ) {
1796                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1797                                 $match = self::matchSpamRegex( $this->sectiontitle );
1798                         } else {
1799                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1800                                 # is used with the 'summary' parameter.
1801                                 $match = self::matchSpamRegex( $this->summary );
1802                         }
1803                 }
1804                 if ( $match === false ) {
1805                         $match = self::matchSpamRegex( $this->textbox1 );
1806                 }
1807                 if ( $match !== false ) {
1808                         $result['spam'] = $match;
1809                         $ip = $wgRequest->getIP();
1810                         $pdbk = $this->mTitle->getPrefixedDBkey();
1811                         $match = str_replace( "\n", '', $match );
1812                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1813                         $status->fatal( 'spamprotectionmatch', $match );
1814                         $status->value = self::AS_SPAM_ERROR;
1815                         return $status;
1816                 }
1817                 if ( !Hooks::run(
1818                         'EditFilter',
1819                         [ $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ] )
1820                 ) {
1821                         # Error messages etc. could be handled within the hook...
1822                         $status->fatal( 'hookaborted' );
1823                         $status->value = self::AS_HOOK_ERROR;
1824                         return $status;
1825                 } elseif ( $this->hookError != '' ) {
1826                         # ...or the hook could be expecting us to produce an error
1827                         $status->fatal( 'hookaborted' );
1828                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1829                         return $status;
1830                 }
1831
1832                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1833                         // Auto-block user's IP if the account was "hard" blocked
1834                         if ( !wfReadOnly() ) {
1835                                 $wgUser->spreadAnyEditBlock();
1836                         }
1837                         # Check block state against master, thus 'false'.
1838                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1839                         return $status;
1840                 }
1841
1842                 $this->contentLength = strlen( $this->textbox1 );
1843                 if ( $this->contentLength > $wgMaxArticleSize * 1024 ) {
1844                         // Error will be displayed by showEditForm()
1845                         $this->tooBig = true;
1846                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1847                         return $status;
1848                 }
1849
1850                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1851                         if ( $wgUser->isAnon() ) {
1852                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1853                                 return $status;
1854                         } else {
1855                                 $status->fatal( 'readonlytext' );
1856                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1857                                 return $status;
1858                         }
1859                 }
1860
1861                 $changingContentModel = false;
1862                 if ( $this->contentModel !== $this->mTitle->getContentModel() ) {
1863                         if ( !$wgContentHandlerUseDB ) {
1864                                 $status->fatal( 'editpage-cannot-use-custom-model' );
1865                                 $status->value = self::AS_CANNOT_USE_CUSTOM_MODEL;
1866                                 return $status;
1867                         } elseif ( !$wgUser->isAllowed( 'editcontentmodel' ) ) {
1868                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1869                                 return $status;
1870                         }
1871                         // Make sure the user can edit the page under the new content model too
1872                         $titleWithNewContentModel = clone $this->mTitle;
1873                         $titleWithNewContentModel->setContentModel( $this->contentModel );
1874                         if ( !$titleWithNewContentModel->userCan( 'editcontentmodel', $wgUser )
1875                                 || !$titleWithNewContentModel->userCan( 'edit', $wgUser )
1876                         ) {
1877                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1878                                 return $status;
1879                         }
1880
1881                         $changingContentModel = true;
1882                         $oldContentModel = $this->mTitle->getContentModel();
1883                 }
1884
1885                 if ( $this->changeTags ) {
1886                         $changeTagsStatus = ChangeTags::canAddTagsAccompanyingChange(
1887                                 $this->changeTags, $wgUser );
1888                         if ( !$changeTagsStatus->isOK() ) {
1889                                 $changeTagsStatus->value = self::AS_CHANGE_TAG_ERROR;
1890                                 return $changeTagsStatus;
1891                         }
1892                 }
1893
1894                 if ( wfReadOnly() ) {
1895                         $status->fatal( 'readonlytext' );
1896                         $status->value = self::AS_READ_ONLY_PAGE;
1897                         return $status;
1898                 }
1899                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 )
1900                         || ( $changingContentModel && $wgUser->pingLimiter( 'editcontentmodel' ) )
1901                 ) {
1902                         $status->fatal( 'actionthrottledtext' );
1903                         $status->value = self::AS_RATE_LIMITED;
1904                         return $status;
1905                 }
1906
1907                 # If the article has been deleted while editing, don't save it without
1908                 # confirmation
1909                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1910                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1911                         return $status;
1912                 }
1913
1914                 # Load the page data from the master. If anything changes in the meantime,
1915                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1916                 $this->page->loadPageData( 'fromdbmaster' );
1917                 $new = !$this->page->exists();
1918
1919                 if ( $new ) {
1920                         // Late check for create permission, just in case *PARANOIA*
1921                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1922                                 $status->fatal( 'nocreatetext' );
1923                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1924                                 wfDebug( __METHOD__ . ": no create permission\n" );
1925                                 return $status;
1926                         }
1927
1928                         // Don't save a new page if it's blank or if it's a MediaWiki:
1929                         // message with content equivalent to default (allow empty pages
1930                         // in this case to disable messages, see T52124)
1931                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1932                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1933                                 $defaultText = $defaultMessageText;
1934                         } else {
1935                                 $defaultText = '';
1936                         }
1937
1938                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
1939                                 $this->blankArticle = true;
1940                                 $status->fatal( 'blankarticle' );
1941                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1942                                 return $status;
1943                         }
1944
1945                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1946                                 return $status;
1947                         }
1948
1949                         $content = $textbox_content;
1950
1951                         $result['sectionanchor'] = '';
1952                         if ( $this->section == 'new' ) {
1953                                 if ( $this->sectiontitle !== '' ) {
1954                                         // Insert the section title above the content.
1955                                         $content = $content->addSectionHeader( $this->sectiontitle );
1956                                 } elseif ( $this->summary !== '' ) {
1957                                         // Insert the section title above the content.
1958                                         $content = $content->addSectionHeader( $this->summary );
1959                                 }
1960                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
1961                         }
1962
1963                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1964
1965                 } else { # not $new
1966
1967                         # Article exists. Check for edit conflict.
1968
1969                         $this->page->clear(); # Force reload of dates, etc.
1970                         $timestamp = $this->page->getTimestamp();
1971                         $latest = $this->page->getLatest();
1972
1973                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1974
1975                         // Check editRevId if set, which handles same-second timestamp collisions
1976                         if ( $timestamp != $this->edittime
1977                                 || ( $this->editRevId !== null && $this->editRevId != $latest )
1978                         ) {
1979                                 $this->isConflict = true;
1980                                 if ( $this->section == 'new' ) {
1981                                         if ( $this->page->getUserText() == $wgUser->getName() &&
1982                                                 $this->page->getComment() == $this->newSectionSummary()
1983                                         ) {
1984                                                 // Probably a duplicate submission of a new comment.
1985                                                 // This can happen when CDN resends a request after
1986                                                 // a timeout but the first one actually went through.
1987                                                 wfDebug( __METHOD__
1988                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
1989                                         } else {
1990                                                 // New comment; suppress conflict.
1991                                                 $this->isConflict = false;
1992                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1993                                         }
1994                                 } elseif ( $this->section == ''
1995                                         && Revision::userWasLastToEdit(
1996                                                 DB_MASTER, $this->mTitle->getArticleID(),
1997                                                 $wgUser->getId(), $this->edittime
1998                                         )
1999                                 ) {
2000                                         # Suppress edit conflict with self, except for section edits where merging is required.
2001                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
2002                                         $this->isConflict = false;
2003                                 }
2004                         }
2005
2006                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
2007                         if ( $this->sectiontitle !== '' ) {
2008                                 $sectionTitle = $this->sectiontitle;
2009                         } else {
2010                                 $sectionTitle = $this->summary;
2011                         }
2012
2013                         $content = null;
2014
2015                         if ( $this->isConflict ) {
2016                                 wfDebug( __METHOD__
2017                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
2018                                         . " (id '{$this->editRevId}') (article time '{$timestamp}')\n" );
2019                                 // @TODO: replaceSectionAtRev() with base ID (not prior current) for ?oldid=X case
2020                                 // ...or disable section editing for non-current revisions (not exposed anyway).
2021                                 if ( $this->editRevId !== null ) {
2022                                         $content = $this->page->replaceSectionAtRev(
2023                                                 $this->section,
2024                                                 $textbox_content,
2025                                                 $sectionTitle,
2026                                                 $this->editRevId
2027                                         );
2028                                 } else {
2029                                         $content = $this->page->replaceSectionContent(
2030                                                 $this->section,
2031                                                 $textbox_content,
2032                                                 $sectionTitle,
2033                                                 $this->edittime
2034                                         );
2035                                 }
2036                         } else {
2037                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
2038                                 $content = $this->page->replaceSectionContent(
2039                                         $this->section,
2040                                         $textbox_content,
2041                                         $sectionTitle
2042                                 );
2043                         }
2044
2045                         if ( is_null( $content ) ) {
2046                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
2047                                 $this->isConflict = true;
2048                                 $content = $textbox_content; // do not try to merge here!
2049                         } elseif ( $this->isConflict ) {
2050                                 # Attempt merge
2051                                 if ( $this->mergeChangesIntoContent( $content ) ) {
2052                                         // Successful merge! Maybe we should tell the user the good news?
2053                                         $this->isConflict = false;
2054                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
2055                                 } else {
2056                                         $this->section = '';
2057                                         $this->textbox1 = ContentHandler::getContentText( $content );
2058                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
2059                                 }
2060                         }
2061
2062                         if ( $this->isConflict ) {
2063                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
2064                                 return $status;
2065                         }
2066
2067                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
2068                                 return $status;
2069                         }
2070
2071                         if ( $this->section == 'new' ) {
2072                                 // Handle the user preference to force summaries here
2073                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
2074                                         $this->missingSummary = true;
2075                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
2076                                         $status->value = self::AS_SUMMARY_NEEDED;
2077                                         return $status;
2078                                 }
2079
2080                                 // Do not allow the user to post an empty comment
2081                                 if ( $this->textbox1 == '' ) {
2082                                         $this->missingComment = true;
2083                                         $status->fatal( 'missingcommenttext' );
2084                                         $status->value = self::AS_TEXTBOX_EMPTY;
2085                                         return $status;
2086                                 }
2087                         } elseif ( !$this->allowBlankSummary
2088                                 && !$content->equals( $this->getOriginalContent( $wgUser ) )
2089                                 && !$content->isRedirect()
2090                                 && md5( $this->summary ) == $this->autoSumm
2091                         ) {
2092                                 $this->missingSummary = true;
2093                                 $status->fatal( 'missingsummary' );
2094                                 $status->value = self::AS_SUMMARY_NEEDED;
2095                                 return $status;
2096                         }
2097
2098                         # All's well
2099                         $sectionanchor = '';
2100                         if ( $this->section == 'new' ) {
2101                                 $this->summary = $this->newSectionSummary( $sectionanchor );
2102                         } elseif ( $this->section != '' ) {
2103                                 # Try to get a section anchor from the section source, redirect
2104                                 # to edited section if header found.
2105                                 # XXX: Might be better to integrate this into Article::replaceSectionAtRev
2106                                 # for duplicate heading checking and maybe parsing.
2107                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
2108                                 # We can't deal with anchors, includes, html etc in the header for now,
2109                                 # headline would need to be parsed to improve this.
2110                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
2111                                         $sectionanchor = $this->guessSectionName( $matches[2] );
2112                                 }
2113                         }
2114                         $result['sectionanchor'] = $sectionanchor;
2115
2116                         // Save errors may fall down to the edit form, but we've now
2117                         // merged the section into full text. Clear the section field
2118                         // so that later submission of conflict forms won't try to
2119                         // replace that into a duplicated mess.
2120                         $this->textbox1 = $this->toEditText( $content );
2121                         $this->section = '';
2122
2123                         $status->value = self::AS_SUCCESS_UPDATE;
2124                 }
2125
2126                 if ( !$this->allowSelfRedirect
2127                         && $content->isRedirect()
2128                         && $content->getRedirectTarget()->equals( $this->getTitle() )
2129                 ) {
2130                         // If the page already redirects to itself, don't warn.
2131                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
2132                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
2133                                 $this->selfRedirect = true;
2134                                 $status->fatal( 'selfredirect' );
2135                                 $status->value = self::AS_SELF_REDIRECT;
2136                                 return $status;
2137                         }
2138                 }
2139
2140                 // Check for length errors again now that the section is merged in
2141                 $this->contentLength = strlen( $this->toEditText( $content ) );
2142                 if ( $this->contentLength > $wgMaxArticleSize * 1024 ) {
2143                         $this->tooBig = true;
2144                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
2145                         return $status;
2146                 }
2147
2148                 $flags = EDIT_AUTOSUMMARY |
2149                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
2150                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
2151                         ( $bot ? EDIT_FORCE_BOT : 0 );
2152
2153                 $doEditStatus = $this->page->doEditContent(
2154                         $content,
2155                         $this->summary,
2156                         $flags,
2157                         false,
2158                         $wgUser,
2159                         $content->getDefaultFormat(),
2160                         $this->changeTags,
2161                         $this->undidRev
2162                 );
2163
2164                 if ( !$doEditStatus->isOK() ) {
2165                         // Failure from doEdit()
2166                         // Show the edit conflict page for certain recognized errors from doEdit(),
2167                         // but don't show it for errors from extension hooks
2168                         $errors = $doEditStatus->getErrorsArray();
2169                         if ( in_array( $errors[0][0],
2170                                         [ 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ] )
2171                         ) {
2172                                 $this->isConflict = true;
2173                                 // Destroys data doEdit() put in $status->value but who cares
2174                                 $doEditStatus->value = self::AS_END;
2175                         }
2176                         return $doEditStatus;
2177                 }
2178
2179                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
2180                 if ( $result['nullEdit'] ) {
2181                         // We don't know if it was a null edit until now, so increment here
2182                         $wgUser->pingLimiter( 'linkpurge' );
2183                 }
2184                 $result['redirect'] = $content->isRedirect();
2185
2186                 $this->updateWatchlist();
2187
2188                 // If the content model changed, add a log entry
2189                 if ( $changingContentModel ) {
2190                         $this->addContentModelChangeLogEntry(
2191                                 $wgUser,
2192                                 $new ? false : $oldContentModel,
2193                                 $this->contentModel,
2194                                 $this->summary
2195                         );
2196                 }
2197
2198                 return $status;
2199         }
2200
2201         /**
2202          * @param User $user
2203          * @param string|false $oldModel false if the page is being newly created
2204          * @param string $newModel
2205          * @param string $reason
2206          */
2207         protected function addContentModelChangeLogEntry( User $user, $oldModel, $newModel, $reason ) {
2208                 $new = $oldModel === false;
2209                 $log = new ManualLogEntry( 'contentmodel', $new ? 'new' : 'change' );
2210                 $log->setPerformer( $user );
2211                 $log->setTarget( $this->mTitle );
2212                 $log->setComment( $reason );
2213                 $log->setParameters( [
2214                         '4::oldmodel' => $oldModel,
2215                         '5::newmodel' => $newModel
2216                 ] );
2217                 $logid = $log->insert();
2218                 $log->publish( $logid );
2219         }
2220
2221         /**
2222          * Register the change of watch status
2223          */
2224         protected function updateWatchlist() {
2225                 global $wgUser;
2226
2227                 if ( !$wgUser->isLoggedIn() ) {
2228                         return;
2229                 }
2230
2231                 $user = $wgUser;
2232                 $title = $this->mTitle;
2233                 $watch = $this->watchthis;
2234                 // Do this in its own transaction to reduce contention...
2235                 DeferredUpdates::addCallableUpdate( function () use ( $user, $title, $watch ) {
2236                         if ( $watch == $user->isWatched( $title, User::IGNORE_USER_RIGHTS ) ) {
2237                                 return; // nothing to change
2238                         }
2239                         WatchAction::doWatchOrUnwatch( $watch, $title, $user );
2240                 } );
2241         }
2242
2243         /**
2244          * Attempts to do 3-way merge of edit content with a base revision
2245          * and current content, in case of edit conflict, in whichever way appropriate
2246          * for the content type.
2247          *
2248          * @since 1.21
2249          *
2250          * @param Content $editContent
2251          *
2252          * @return bool
2253          */
2254         private function mergeChangesIntoContent( &$editContent ) {
2255                 $db = wfGetDB( DB_MASTER );
2256
2257                 // This is the revision the editor started from
2258                 $baseRevision = $this->getBaseRevision();
2259                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
2260
2261                 if ( is_null( $baseContent ) ) {
2262                         return false;
2263                 }
2264
2265                 // The current state, we want to merge updates into it
2266                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2267                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2268
2269                 if ( is_null( $currentContent ) ) {
2270                         return false;
2271                 }
2272
2273                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2274
2275                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2276
2277                 if ( $result ) {
2278                         $editContent = $result;
2279                         // Update parentRevId to what we just merged.
2280                         $this->parentRevId = $currentRevision->getId();
2281                         return true;
2282                 }
2283
2284                 return false;
2285         }
2286
2287         /**
2288          * @note: this method is very poorly named. If the user opened the form with ?oldid=X,
2289          *        one might think of X as the "base revision", which is NOT what this returns.
2290          * @return Revision Current version when the edit was started
2291          */
2292         public function getBaseRevision() {
2293                 if ( !$this->mBaseRevision ) {
2294                         $db = wfGetDB( DB_MASTER );
2295                         $this->mBaseRevision = $this->editRevId
2296                                 ? Revision::newFromId( $this->editRevId, Revision::READ_LATEST )
2297                                 : Revision::loadFromTimestamp( $db, $this->mTitle, $this->edittime );
2298                 }
2299                 return $this->mBaseRevision;
2300         }
2301
2302         /**
2303          * Check given input text against $wgSpamRegex, and return the text of the first match.
2304          *
2305          * @param string $text
2306          *
2307          * @return string|bool Matching string or false
2308          */
2309         public static function matchSpamRegex( $text ) {
2310                 global $wgSpamRegex;
2311                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2312                 $regexes = (array)$wgSpamRegex;
2313                 return self::matchSpamRegexInternal( $text, $regexes );
2314         }
2315
2316         /**
2317          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2318          *
2319          * @param string $text
2320          *
2321          * @return string|bool Matching string or false
2322          */
2323         public static function matchSummarySpamRegex( $text ) {
2324                 global $wgSummarySpamRegex;
2325                 $regexes = (array)$wgSummarySpamRegex;
2326                 return self::matchSpamRegexInternal( $text, $regexes );
2327         }
2328
2329         /**
2330          * @param string $text
2331          * @param array $regexes
2332          * @return bool|string
2333          */
2334         protected static function matchSpamRegexInternal( $text, $regexes ) {
2335                 foreach ( $regexes as $regex ) {
2336                         $matches = [];
2337                         if ( preg_match( $regex, $text, $matches ) ) {
2338                                 return $matches[0];
2339                         }
2340                 }
2341                 return false;
2342         }
2343
2344         public function setHeaders() {
2345                 global $wgOut, $wgUser, $wgAjaxEditStash;
2346
2347                 $wgOut->addModules( 'mediawiki.action.edit' );
2348                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
2349
2350                 if ( $wgUser->getOption( 'showtoolbar' ) ) {
2351                         // The addition of default buttons is handled by getEditToolbar() which
2352                         // has its own dependency on this module. The call here ensures the module
2353                         // is loaded in time (it has position "top") for other modules to register
2354                         // buttons (e.g. extensions, gadgets, user scripts).
2355                         $wgOut->addModules( 'mediawiki.toolbar' );
2356                 }
2357
2358                 if ( $wgUser->getOption( 'uselivepreview' ) ) {
2359                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
2360                 }
2361
2362                 if ( $wgUser->getOption( 'useeditwarning' ) ) {
2363                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
2364                 }
2365
2366                 # Enabled article-related sidebar, toplinks, etc.
2367                 $wgOut->setArticleRelated( true );
2368
2369                 $contextTitle = $this->getContextTitle();
2370                 if ( $this->isConflict ) {
2371                         $msg = 'editconflict';
2372                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2373                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2374                 } else {
2375                         $msg = $contextTitle->exists()
2376                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2377                                         && $contextTitle->getDefaultMessageText() !== false
2378                                 )
2379                                 ? 'editing'
2380                                 : 'creating';
2381                 }
2382
2383                 # Use the title defined by DISPLAYTITLE magic word when present
2384                 # NOTE: getDisplayTitle() returns HTML while getPrefixedText() returns plain text.
2385                 #       setPageTitle() treats the input as wikitext, which should be safe in either case.
2386                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2387                 if ( $displayTitle === false ) {
2388                         $displayTitle = $contextTitle->getPrefixedText();
2389                 }
2390                 $wgOut->setPageTitle( $this->context->msg( $msg, $displayTitle ) );
2391                 # Transmit the name of the message to JavaScript for live preview
2392                 # Keep Resources.php/mediawiki.action.edit.preview in sync with the possible keys
2393                 $wgOut->addJsConfigVars( [
2394                         'wgEditMessage' => $msg,
2395                         'wgAjaxEditStash' => $wgAjaxEditStash,
2396                 ] );
2397         }
2398
2399         /**
2400          * Show all applicable editing introductions
2401          */
2402         protected function showIntro() {
2403                 global $wgOut, $wgUser;
2404                 if ( $this->suppressIntro ) {
2405                         return;
2406                 }
2407
2408                 $namespace = $this->mTitle->getNamespace();
2409
2410                 if ( $namespace == NS_MEDIAWIKI ) {
2411                         # Show a warning if editing an interface message
2412                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2413                         # If this is a default message (but not css or js),
2414                         # show a hint that it is translatable on translatewiki.net
2415                         if ( !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2416                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2417                         ) {
2418                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2419                                 if ( $defaultMessageText !== false ) {
2420                                         $wgOut->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2421                                                 'translateinterface' );
2422                                 }
2423                         }
2424                 } elseif ( $namespace == NS_FILE ) {
2425                         # Show a hint to shared repo
2426                         $file = wfFindFile( $this->mTitle );
2427                         if ( $file && !$file->isLocal() ) {
2428                                 $descUrl = $file->getDescriptionUrl();
2429                                 # there must be a description url to show a hint to shared repo
2430                                 if ( $descUrl ) {
2431                                         if ( !$this->mTitle->exists() ) {
2432                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", [
2433                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2434                                                 ] );
2435                                         } else {
2436                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", [
2437                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2438                                                 ] );
2439                                         }
2440                                 }
2441                         }
2442                 }
2443
2444                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2445                 # Show log extract when the user is currently blocked
2446                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2447                         $username = explode( '/', $this->mTitle->getText(), 2 )[0];
2448                         $user = User::newFromName( $username, false /* allow IP users */ );
2449                         $ip = User::isIP( $username );
2450                         $block = Block::newFromTarget( $user, $user );
2451                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2452                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2453                                         [ 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ] );
2454                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
2455                                 # Show log extract if the user is currently blocked
2456                                 LogEventsList::showLogExtract(
2457                                         $wgOut,
2458                                         'block',
2459                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2460                                         '',
2461                                         [
2462                                                 'lim' => 1,
2463                                                 'showIfEmpty' => false,
2464                                                 'msgKey' => [
2465                                                         'blocked-notice-logextract',
2466                                                         $user->getName() # Support GENDER in notice
2467                                                 ]
2468                                         ]
2469                                 );
2470                         }
2471                 }
2472                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2473                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2474                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2475                                 $this->context->msg( 'helppage' )->inContentLanguage()->text()
2476                         ) );
2477                         if ( $wgUser->isLoggedIn() ) {
2478                                 $wgOut->wrapWikiMsg(
2479                                         // Suppress the external link icon, consider the help url an internal one
2480                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2481                                         [
2482                                                 'newarticletext',
2483                                                 $helpLink
2484                                         ]
2485                                 );
2486                         } else {
2487                                 $wgOut->wrapWikiMsg(
2488                                         // Suppress the external link icon, consider the help url an internal one
2489                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2490                                         [
2491                                                 'newarticletextanon',
2492                                                 $helpLink
2493                                         ]
2494                                 );
2495                         }
2496                 }
2497                 # Give a notice if the user is editing a deleted/moved page...
2498                 if ( !$this->mTitle->exists() ) {
2499                         $dbr = wfGetDB( DB_REPLICA );
2500
2501                         LogEventsList::showLogExtract( $wgOut, [ 'delete', 'move' ], $this->mTitle,
2502                                 '',
2503                                 [
2504                                         'lim' => 10,
2505                                         'conds' => [ 'log_action != ' . $dbr->addQuotes( 'revision' ) ],
2506                                         'showIfEmpty' => false,
2507                                         'msgKey' => [ 'recreate-moveddeleted-warn' ]
2508                                 ]
2509                         );
2510                 }
2511         }
2512
2513         /**
2514          * Attempt to show a custom editing introduction, if supplied
2515          *
2516          * @return bool
2517          */
2518         protected function showCustomIntro() {
2519                 if ( $this->editintro ) {
2520                         $title = Title::newFromText( $this->editintro );
2521                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2522                                 global $wgOut;
2523                                 // Added using template syntax, to take <noinclude>'s into account.
2524                                 $wgOut->addWikiTextTitleTidy(
2525                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2526                                         $this->mTitle
2527                                 );
2528                                 return true;
2529                         }
2530                 }
2531                 return false;
2532         }
2533
2534         /**
2535          * Gets an editable textual representation of $content.
2536          * The textual representation can be turned by into a Content object by the
2537          * toEditContent() method.
2538          *
2539          * If $content is null or false or a string, $content is returned unchanged.
2540          *
2541          * If the given Content object is not of a type that can be edited using
2542          * the text base EditPage, an exception will be raised. Set
2543          * $this->allowNonTextContent to true to allow editing of non-textual
2544          * content.
2545          *
2546          * @param Content|null|bool|string $content
2547          * @return string The editable text form of the content.
2548          *
2549          * @throws MWException If $content is not an instance of TextContent and
2550          *   $this->allowNonTextContent is not true.
2551          */
2552         protected function toEditText( $content ) {
2553                 if ( $content === null || $content === false || is_string( $content ) ) {
2554                         return $content;
2555                 }
2556
2557                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2558                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2559                 }
2560
2561                 return $content->serialize( $this->contentFormat );
2562         }
2563
2564         /**
2565          * Turns the given text into a Content object by unserializing it.
2566          *
2567          * If the resulting Content object is not of a type that can be edited using
2568          * the text base EditPage, an exception will be raised. Set
2569          * $this->allowNonTextContent to true to allow editing of non-textual
2570          * content.
2571          *
2572          * @param string|null|bool $text Text to unserialize
2573          * @return Content|bool|null The content object created from $text. If $text was false
2574          *   or null, false resp. null will be  returned instead.
2575          *
2576          * @throws MWException If unserializing the text results in a Content
2577          *   object that is not an instance of TextContent and
2578          *   $this->allowNonTextContent is not true.
2579          */
2580         protected function toEditContent( $text ) {
2581                 if ( $text === false || $text === null ) {
2582                         return $text;
2583                 }
2584
2585                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2586                         $this->contentModel, $this->contentFormat );
2587
2588                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2589                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2590                 }
2591
2592                 return $content;
2593         }
2594
2595         /**
2596          * Send the edit form and related headers to $wgOut
2597          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2598          *     during form output near the top, for captchas and the like.
2599          *
2600          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2601          * use the EditPage::showEditForm:fields hook instead.
2602          */
2603         public function showEditForm( $formCallback = null ) {
2604                 global $wgOut, $wgUser;
2605
2606                 # need to parse the preview early so that we know which templates are used,
2607                 # otherwise users with "show preview after edit box" will get a blank list
2608                 # we parse this near the beginning so that setHeaders can do the title
2609                 # setting work instead of leaving it in getPreviewText
2610                 $previewOutput = '';
2611                 if ( $this->formtype == 'preview' ) {
2612                         $previewOutput = $this->getPreviewText();
2613                 }
2614
2615                 // Avoid PHP 7.1 warning of passing $this by reference
2616                 $editPage = $this;
2617                 Hooks::run( 'EditPage::showEditForm:initial', [ &$editPage, &$wgOut ] );
2618
2619                 $this->setHeaders();
2620
2621                 $this->addTalkPageText();
2622                 $this->addEditNotices();
2623
2624                 if ( !$this->isConflict &&
2625                         $this->section != '' &&
2626                         !$this->isSectionEditSupported() ) {
2627                         // We use $this->section to much before this and getVal('wgSection') directly in other places
2628                         // at this point we can't reset $this->section to '' to fallback to non-section editing.
2629                         // Someone is welcome to try refactoring though
2630                         $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2631                         return;
2632                 }
2633
2634                 $this->showHeader();
2635
2636                 $wgOut->addHTML( $this->editFormPageTop );
2637
2638                 if ( $wgUser->getOption( 'previewontop' ) ) {
2639                         $this->displayPreviewArea( $previewOutput, true );
2640                 }
2641
2642                 $wgOut->addHTML( $this->editFormTextTop );
2643
2644                 $showToolbar = true;
2645                 if ( $this->wasDeletedSinceLastEdit() ) {
2646                         if ( $this->formtype == 'save' ) {
2647                                 // Hide the toolbar and edit area, user can click preview to get it back
2648                                 // Add an confirmation checkbox and explanation.
2649                                 $showToolbar = false;
2650                         } else {
2651                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2652                                         'deletedwhileediting' );
2653                         }
2654                 }
2655
2656                 // @todo add EditForm plugin interface and use it here!
2657                 //       search for textarea1 and textarea2, and allow EditForm to override all uses.
2658                 $wgOut->addHTML( Html::openElement(
2659                         'form',
2660                         [
2661                                 'class' => 'mw-editform',
2662                                 'id' => self::EDITFORM_ID,
2663                                 'name' => self::EDITFORM_ID,
2664                                 'method' => 'post',
2665                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2666                                 'enctype' => 'multipart/form-data'
2667                         ]
2668                 ) );
2669
2670                 if ( is_callable( $formCallback ) ) {
2671                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2672                         call_user_func_array( $formCallback, [ &$wgOut ] );
2673                 }
2674
2675                 // Add an empty field to trip up spambots
2676                 $wgOut->addHTML(
2677                         Xml::openElement( 'div', [ 'id' => 'antispam-container', 'style' => 'display: none;' ] )
2678                         . Html::rawElement(
2679                                 'label',
2680                                 [ 'for' => 'wpAntispam' ],
2681                                 $this->context->msg( 'simpleantispam-label' )->parse()
2682                         )
2683                         . Xml::element(
2684                                 'input',
2685                                 [
2686                                         'type' => 'text',
2687                                         'name' => 'wpAntispam',
2688                                         'id' => 'wpAntispam',
2689                                         'value' => ''
2690                                 ]
2691                         )
2692                         . Xml::closeElement( 'div' )
2693                 );
2694
2695                 // Avoid PHP 7.1 warning of passing $this by reference
2696                 $editPage = $this;
2697                 Hooks::run( 'EditPage::showEditForm:fields', [ &$editPage, &$wgOut ] );
2698
2699                 // Put these up at the top to ensure they aren't lost on early form submission
2700                 $this->showFormBeforeText();
2701
2702                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2703                         $username = $this->lastDelete->user_name;
2704                         $comment = CommentStore::newKey( 'log_comment' )->getComment( $this->lastDelete )->text;
2705
2706                         // It is better to not parse the comment at all than to have templates expanded in the middle
2707                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2708                         $key = $comment === ''
2709                                 ? 'confirmrecreate-noreason'
2710                                 : 'confirmrecreate';
2711                         $wgOut->addHTML(
2712                                 '<div class="mw-confirm-recreate">' .
2713                                         $this->context->msg( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2714                                 Xml::checkLabel( $this->context->msg( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2715                                         [ 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' ]
2716                                 ) .
2717                                 '</div>'
2718                         );
2719                 }
2720
2721                 # When the summary is hidden, also hide them on preview/show changes
2722                 if ( $this->nosummary ) {
2723                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2724                 }
2725
2726                 # If a blank edit summary was previously provided, and the appropriate
2727                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2728                 # user being bounced back more than once in the event that a summary
2729                 # is not required.
2730                 # ####
2731                 # For a bit more sophisticated detection of blank summaries, hash the
2732                 # automatic one and pass that in the hidden field wpAutoSummary.
2733                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2734                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2735                 }
2736
2737                 if ( $this->undidRev ) {
2738                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2739                 }
2740
2741                 if ( $this->selfRedirect ) {
2742                         $wgOut->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2743                 }
2744
2745                 if ( $this->hasPresetSummary ) {
2746                         // If a summary has been preset using &summary= we don't want to prompt for
2747                         // a different summary. Only prompt for a summary if the summary is blanked.
2748                         // (T19416)
2749                         $this->autoSumm = md5( '' );
2750                 }
2751
2752                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2753                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2754
2755                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2756                 $wgOut->addHTML( Html::hidden( 'parentRevId', $this->getParentRevId() ) );
2757
2758                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2759                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2760
2761                 $wgOut->enableOOUI();
2762
2763                 if ( $this->section == 'new' ) {
2764                         $this->showSummaryInput( true, $this->summary );
2765                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2766                 }
2767
2768                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2769
2770                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2771                         $wgOut->addHTML( self::getEditToolbar( $this->mTitle ) );
2772                 }
2773
2774                 if ( $this->blankArticle ) {
2775                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2776                 }
2777
2778                 if ( $this->isConflict ) {
2779                         // In an edit conflict bypass the overridable content form method
2780                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2781                         // resolved between page source edits and custom ui edits using the
2782                         // custom edit ui.
2783                         $this->textbox2 = $this->textbox1;
2784
2785                         $content = $this->getCurrentContent();
2786                         $this->textbox1 = $this->toEditText( $content );
2787
2788                         $this->showTextbox1();
2789                 } else {
2790                         $this->showContentForm();
2791                 }
2792
2793                 $wgOut->addHTML( $this->editFormTextAfterContent );
2794
2795                 $this->showStandardInputs();
2796
2797                 $this->showFormAfterText();
2798
2799                 $this->showTosSummary();
2800
2801                 $this->showEditTools();
2802
2803                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2804
2805                 $wgOut->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
2806
2807                 $wgOut->addHTML( Html::rawElement( 'div', [ 'class' => 'hiddencats' ],
2808                         Linker::formatHiddenCategories( $this->page->getHiddenCategories() ) ) );
2809
2810                 $wgOut->addHTML( Html::rawElement( 'div', [ 'class' => 'limitreport' ],
2811                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2812
2813                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2814
2815                 if ( $this->isConflict ) {
2816                         try {
2817                                 $this->showConflict();
2818                         } catch ( MWContentSerializationException $ex ) {
2819                                 // this can't really happen, but be nice if it does.
2820                                 $msg = $this->context->msg(
2821                                         'content-failed-to-parse',
2822                                         $this->contentModel,
2823                                         $this->contentFormat,
2824                                         $ex->getMessage()
2825                                 );
2826                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2827                         }
2828                 }
2829
2830                 // Set a hidden field so JS knows what edit form mode we are in
2831                 if ( $this->isConflict ) {
2832                         $mode = 'conflict';
2833                 } elseif ( $this->preview ) {
2834                         $mode = 'preview';
2835                 } elseif ( $this->diff ) {
2836                         $mode = 'diff';
2837                 } else {
2838                         $mode = 'text';
2839                 }
2840                 $wgOut->addHTML( Html::hidden( 'mode', $mode, [ 'id' => 'mw-edit-mode' ] ) );
2841
2842                 // Marker for detecting truncated form data.  This must be the last
2843                 // parameter sent in order to be of use, so do not move me.
2844                 $wgOut->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2845                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2846
2847                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2848                         $this->displayPreviewArea( $previewOutput, false );
2849                 }
2850         }
2851
2852         /**
2853          * Wrapper around TemplatesOnThisPageFormatter to make
2854          * a "templates on this page" list.
2855          *
2856          * @param Title[] $templates
2857          * @return string HTML
2858          */
2859         public function makeTemplatesOnThisPageList( array $templates ) {
2860                 $templateListFormatter = new TemplatesOnThisPageFormatter(
2861                         $this->context, MediaWikiServices::getInstance()->getLinkRenderer()
2862                 );
2863
2864                 // preview if preview, else section if section, else false
2865                 $type = false;
2866                 if ( $this->preview ) {
2867                         $type = 'preview';
2868                 } elseif ( $this->section != '' ) {
2869                         $type = 'section';
2870                 }
2871
2872                 return Html::rawElement( 'div', [ 'class' => 'templatesUsed' ],
2873                         $templateListFormatter->format( $templates, $type )
2874                 );
2875         }
2876
2877         /**
2878          * Extract the section title from current section text, if any.
2879          *
2880          * @param string $text
2881          * @return string|bool String or false
2882          */
2883         public static function extractSectionTitle( $text ) {
2884                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2885                 if ( !empty( $matches[2] ) ) {
2886                         global $wgParser;
2887                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2888                 } else {
2889                         return false;
2890                 }
2891         }
2892
2893         protected function showHeader() {
2894                 global $wgOut, $wgUser;
2895                 global $wgAllowUserCss, $wgAllowUserJs;
2896
2897                 if ( $this->isConflict ) {
2898                         $this->addExplainConflictHeader( $wgOut );
2899                         $this->editRevId = $this->page->getLatest();
2900                 } else {
2901                         if ( $this->section != '' && $this->section != 'new' ) {
2902                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2903                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); // FIXME: use Content object
2904                                         if ( $sectionTitle !== false ) {
2905                                                 $this->summary = "/* $sectionTitle */ ";
2906                                         }
2907                                 }
2908                         }
2909
2910                         $buttonLabel = $this->context->msg( $this->getSaveButtonLabel() )->text();
2911
2912                         if ( $this->missingComment ) {
2913                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2914                         }
2915
2916                         if ( $this->missingSummary && $this->section != 'new' ) {
2917                                 $wgOut->wrapWikiMsg(
2918                                         "<div id='mw-missingsummary'>\n$1\n</div>",
2919                                         [ 'missingsummary', $buttonLabel ]
2920                                 );
2921                         }
2922
2923                         if ( $this->missingSummary && $this->section == 'new' ) {
2924                                 $wgOut->wrapWikiMsg(
2925                                         "<div id='mw-missingcommentheader'>\n$1\n</div>",
2926                                         [ 'missingcommentheader', $buttonLabel ]
2927                                 );
2928                         }
2929
2930                         if ( $this->blankArticle ) {
2931                                 $wgOut->wrapWikiMsg(
2932                                         "<div id='mw-blankarticle'>\n$1\n</div>",
2933                                         [ 'blankarticle', $buttonLabel ]
2934                                 );
2935                         }
2936
2937                         if ( $this->selfRedirect ) {
2938                                 $wgOut->wrapWikiMsg(
2939                                         "<div id='mw-selfredirect'>\n$1\n</div>",
2940                                         [ 'selfredirect', $buttonLabel ]
2941                                 );
2942                         }
2943
2944                         if ( $this->hookError !== '' ) {
2945                                 $wgOut->addWikiText( $this->hookError );
2946                         }
2947
2948                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2949                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2950                         }
2951
2952                         if ( $this->section != 'new' ) {
2953                                 $revision = $this->mArticle->getRevisionFetched();
2954                                 if ( $revision ) {
2955                                         // Let sysop know that this will make private content public if saved
2956
2957                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2958                                                 $wgOut->wrapWikiMsg(
2959                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2960                                                         'rev-deleted-text-permission'
2961                                                 );
2962                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2963                                                 $wgOut->wrapWikiMsg(
2964                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2965                                                         'rev-deleted-text-view'
2966                                                 );
2967                                         }
2968
2969                                         if ( !$revision->isCurrent() ) {
2970                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2971                                                 $wgOut->addWikiMsg( 'editingold' );
2972                                                 $this->isOldRev = true;
2973                                         }
2974                                 } elseif ( $this->mTitle->exists() ) {
2975                                         // Something went wrong
2976
2977                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2978                                                 [ 'missing-revision', $this->oldid ] );
2979                                 }
2980                         }
2981                 }
2982
2983                 if ( wfReadOnly() ) {
2984                         $wgOut->wrapWikiMsg(
2985                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
2986                                 [ 'readonlywarning', wfReadOnlyReason() ]
2987                         );
2988                 } elseif ( $wgUser->isAnon() ) {
2989                         if ( $this->formtype != 'preview' ) {
2990                                 $wgOut->wrapWikiMsg(
2991                                         "<div id='mw-anon-edit-warning' class='warningbox'>\n$1\n</div>",
2992                                         [ 'anoneditwarning',
2993                                                 // Log-in link
2994                                                 SpecialPage::getTitleFor( 'Userlogin' )->getFullURL( [
2995                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
2996                                                 ] ),
2997                                                 // Sign-up link
2998                                                 SpecialPage::getTitleFor( 'CreateAccount' )->getFullURL( [
2999                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
3000                                                 ] )
3001                                         ]
3002                                 );
3003                         } else {
3004                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\" class=\"warningbox\">\n$1</div>",
3005                                         'anonpreviewwarning'
3006                                 );
3007                         }
3008                 } else {
3009                         if ( $this->isCssJsSubpage ) {
3010                                 # Check the skin exists
3011                                 if ( $this->isWrongCaseCssJsPage ) {
3012                                         $wgOut->wrapWikiMsg(
3013                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
3014                                                 [ 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ]
3015                                         );
3016                                 }
3017                                 if ( $this->getTitle()->isSubpageOf( $wgUser->getUserPage() ) ) {
3018                                         $wgOut->wrapWikiMsg( '<div class="mw-usercssjspublic">$1</div>',
3019                                                 $this->isCssSubpage ? 'usercssispublic' : 'userjsispublic'
3020                                         );
3021                                         if ( $this->formtype !== 'preview' ) {
3022                                                 if ( $this->isCssSubpage && $wgAllowUserCss ) {
3023                                                         $wgOut->wrapWikiMsg(
3024                                                                 "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
3025                                                                 [ 'usercssyoucanpreview' ]
3026                                                         );
3027                                                 }
3028
3029                                                 if ( $this->isJsSubpage && $wgAllowUserJs ) {
3030                                                         $wgOut->wrapWikiMsg(
3031                                                                 "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
3032                                                                 [ 'userjsyoucanpreview' ]
3033                                                         );
3034                                                 }
3035                                         }
3036                                 }
3037                         }
3038                 }
3039
3040                 $this->addPageProtectionWarningHeaders();
3041
3042                 $this->addLongPageWarningHeader();
3043
3044                 # Add header copyright warning
3045                 $this->showHeaderCopyrightWarning();
3046         }
3047
3048         /**
3049          * Helper function for summary input functions, which returns the neccessary
3050          * attributes for the input.
3051          *
3052          * @param array|null $inputAttrs Array of attrs to use on the input
3053          * @return array
3054          */
3055         private function getSummaryInputAttributes( array $inputAttrs = null ) {
3056                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
3057                 return ( is_array( $inputAttrs ) ? $inputAttrs : [] ) + [
3058                         'id' => 'wpSummary',
3059                         'name' => 'wpSummary',
3060                         'maxlength' => '200',
3061                         'tabindex' => 1,
3062                         'size' => 60,
3063                         'spellcheck' => 'true',
3064                 ];
3065         }
3066
3067         /**
3068          * Standard summary input and label (wgSummary), abstracted so EditPage
3069          * subclasses may reorganize the form.
3070          * Note that you do not need to worry about the label's for=, it will be
3071          * inferred by the id given to the input. You can remove them both by
3072          * passing [ 'id' => false ] to $userInputAttrs.
3073          *
3074          * @deprecated since 1.30 Use getSummaryInputWidget() instead
3075          * @param string $summary The value of the summary input
3076          * @param string $labelText The html to place inside the label
3077          * @param array $inputAttrs Array of attrs to use on the input
3078          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
3079          * @return array An array in the format [ $label, $input ]
3080          */
3081         public function getSummaryInput( $summary = "", $labelText = null,
3082                 $inputAttrs = null, $spanLabelAttrs = null
3083         ) {
3084                 wfDeprecated( __METHOD__, '1.30' );
3085                 $inputAttrs = $this->getSummaryInputAttributes( $inputAttrs );
3086                 $inputAttrs += Linker::tooltipAndAccesskeyAttribs( 'summary' );
3087
3088                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : [] ) + [
3089                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
3090                         'id' => "wpSummaryLabel"
3091                 ];
3092
3093                 $label = null;
3094                 if ( $labelText ) {
3095                         $label = Xml::tags(
3096                                 'label',
3097                                 $inputAttrs['id'] ? [ 'for' => $inputAttrs['id'] ] : null,
3098                                 $labelText
3099                         );
3100                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
3101                 }
3102
3103                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
3104
3105                 return [ $label, $input ];
3106         }
3107
3108         /**
3109          * Builds a standard summary input with a label.
3110          *
3111          * @deprecated since 1.30 Use getSummaryInputWidget() instead
3112          * @param string $summary The value of the summary input
3113          * @param string $labelText The html to place inside the label
3114          * @param array $inputAttrs Array of attrs to use on the input
3115          *
3116          * @return OOUI\FieldLayout OOUI FieldLayout with Label and Input
3117          */
3118         function getSummaryInputOOUI( $summary = "", $labelText = null, $inputAttrs = null ) {
3119                 wfDeprecated( __METHOD__, '1.30' );
3120                 $this->getSummaryInputWidget( $summary, $labelText, $inputAttrs );
3121         }
3122
3123         /**
3124          * Builds a standard summary input with a label.
3125          *
3126          * @param string $summary The value of the summary input
3127          * @param string $labelText The html to place inside the label
3128          * @param array $inputAttrs Array of attrs to use on the input
3129          *
3130          * @return OOUI\FieldLayout OOUI FieldLayout with Label and Input
3131          */
3132         function getSummaryInputWidget( $summary = "", $labelText = null, $inputAttrs = null ) {
3133                 $inputAttrs = OOUI\Element::configFromHtmlAttributes(
3134                         $this->getSummaryInputAttributes( $inputAttrs )
3135                 );
3136                 $inputAttrs += [
3137                         'title' => Linker::titleAttrib( 'summary' ),
3138                         'accessKey' => Linker::accesskey( 'summary' ),
3139                 ];
3140
3141                 // For compatibility with old scripts and extensions, we want the legacy 'id' on the `<input>`
3142                 $inputAttrs['inputId'] = $inputAttrs['id'];
3143                 $inputAttrs['id'] = 'wpSummaryWidget';
3144
3145                 return new OOUI\FieldLayout(
3146                         new OOUI\TextInputWidget( [
3147                                 'value' => $summary,
3148                                 'infusable' => true,
3149                         ] + $inputAttrs ),
3150                         [
3151                                 'label' => new OOUI\HtmlSnippet( $labelText ),
3152                                 'align' => 'top',
3153                                 'id' => 'wpSummaryLabel',
3154                                 'classes' => [ $this->missingSummary ? 'mw-summarymissed' : 'mw-summary' ],
3155                         ]
3156                 );
3157         }
3158
3159         /**
3160          * @param bool $isSubjectPreview True if this is the section subject/title
3161          *   up top, or false if this is the comment summary
3162          *   down below the textarea
3163          * @param string $summary The text of the summary to display
3164          */
3165         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
3166                 global $wgOut;
3167
3168                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
3169                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
3170                 if ( $isSubjectPreview ) {
3171                         if ( $this->nosummary ) {
3172                                 return;
3173                         }
3174                 } else {
3175                         if ( !$this->mShowSummaryField ) {
3176                                 return;
3177                         }
3178                 }
3179
3180                 $labelText = $this->context->msg( $isSubjectPreview ? 'subject' : 'summary' )->parse();
3181                 $wgOut->addHTML( $this->getSummaryInputWidget(
3182                                 $summary,
3183                                 $labelText,
3184                                 [ 'class' => $summaryClass ]
3185                         ) );
3186         }
3187
3188         /**
3189          * @param bool $isSubjectPreview True if this is the section subject/title
3190          *   up top, or false if this is the comment summary
3191          *   down below the textarea
3192          * @param string $summary The text of the summary to display
3193          * @return string
3194          */
3195         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
3196                 // avoid spaces in preview, gets always trimmed on save
3197                 $summary = trim( $summary );
3198                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
3199                         return "";
3200                 }
3201
3202                 global $wgParser;
3203
3204                 if ( $isSubjectPreview ) {
3205                         $summary = $this->context->msg( 'newsectionsummary' )
3206                                 ->rawParams( $wgParser->stripSectionName( $summary ) )
3207                                 ->inContentLanguage()->text();
3208                 }
3209
3210                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
3211
3212                 $summary = $this->context->msg( $message )->parse()
3213                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
3214                 return Xml::tags( 'div', [ 'class' => 'mw-summary-preview' ], $summary );
3215         }
3216
3217         protected function showFormBeforeText() {
3218                 global $wgOut;
3219
3220                 $wgOut->addHTML( Html::hidden( 'wpSection', htmlspecialchars( $this->section ) ) );
3221                 $wgOut->addHTML( Html::hidden( 'wpStarttime', $this->starttime ) );
3222                 $wgOut->addHTML( Html::hidden( 'wpEdittime', $this->edittime ) );
3223                 $wgOut->addHTML( Html::hidden( 'editRevId', $this->editRevId ) );
3224                 $wgOut->addHTML( Html::hidden( 'wpScrolltop', $this->scrolltop, [ 'id' => 'wpScrolltop' ] ) );
3225
3226                 if ( !$this->checkUnicodeCompliantBrowser() ) {
3227                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
3228                 }
3229         }
3230
3231         protected function showFormAfterText() {
3232                 global $wgOut, $wgUser;
3233                 /**
3234                  * To make it harder for someone to slip a user a page
3235                  * which submits an edit form to the wiki without their
3236                  * knowledge, a random token is associated with the login
3237                  * session. If it's not passed back with the submission,
3238                  * we won't save the page, or render user JavaScript and
3239                  * CSS previews.
3240                  *
3241                  * For anon editors, who may not have a session, we just
3242                  * include the constant suffix to prevent editing from
3243                  * broken text-mangling proxies.
3244                  */
3245                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
3246         }
3247
3248         /**
3249          * Subpage overridable method for printing the form for page content editing
3250          * By default this simply outputs wpTextbox1
3251          * Subclasses can override this to provide a custom UI for editing;
3252          * be it a form, or simply wpTextbox1 with a modified content that will be
3253          * reverse modified when extracted from the post data.
3254          * Note that this is basically the inverse for importContentFormData
3255          */
3256         protected function showContentForm() {
3257                 $this->showTextbox1();
3258         }
3259
3260         /**
3261          * Method to output wpTextbox1
3262          * The $textoverride method can be used by subclasses overriding showContentForm
3263          * to pass back to this method.
3264          *
3265          * @param array $customAttribs Array of html attributes to use in the textarea
3266          * @param string $textoverride Optional text to override $this->textarea1 with
3267          */
3268         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
3269                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
3270                         $attribs = [ 'style' => 'display:none;' ];
3271                 } else {
3272                         $classes = []; // Textarea CSS
3273                         if ( $this->mTitle->isProtected( 'edit' ) &&
3274                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
3275                         ) {
3276                                 # Is the title semi-protected?
3277                                 if ( $this->mTitle->isSemiProtected() ) {
3278                                         $classes[] = 'mw-textarea-sprotected';
3279                                 } else {
3280                                         # Then it must be protected based on static groups (regular)
3281                                         $classes[] = 'mw-textarea-protected';
3282                                 }
3283                                 # Is the title cascade-protected?
3284                                 if ( $this->mTitle->isCascadeProtected() ) {
3285                                         $classes[] = 'mw-textarea-cprotected';
3286                                 }
3287                         }
3288                         # Is an old revision being edited?
3289                         if ( $this->isOldRev ) {
3290                                 $classes[] = 'mw-textarea-oldrev';
3291                         }
3292
3293                         $attribs = [ 'tabindex' => 1 ];
3294
3295                         if ( is_array( $customAttribs ) ) {
3296                                 $attribs += $customAttribs;
3297                         }
3298
3299                         if ( count( $classes ) ) {
3300                                 if ( isset( $attribs['class'] ) ) {
3301                                         $classes[] = $attribs['class'];
3302                                 }
3303                                 $attribs['class'] = implode( ' ', $classes );
3304                         }
3305                 }
3306
3307                 $this->showTextbox(
3308                         $textoverride !== null ? $textoverride : $this->textbox1,
3309                         'wpTextbox1',
3310                         $attribs
3311                 );
3312         }
3313
3314         protected function showTextbox2() {
3315                 $this->showTextbox( $this->textbox2, 'wpTextbox2', [ 'tabindex' => 6, 'readonly' ] );
3316         }
3317
3318         protected function showTextbox( $text, $name, $customAttribs = [] ) {
3319                 global $wgOut, $wgUser;
3320
3321                 $wikitext = $this->safeUnicodeOutput( $text );
3322                 $wikitext = $this->addNewLineAtEnd( $wikitext );
3323
3324                 $attribs = $this->buildTextboxAttribs( $name, $customAttribs, $wgUser );
3325
3326                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
3327         }
3328
3329         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
3330                 global $wgOut;
3331                 $classes = [];
3332                 if ( $isOnTop ) {
3333                         $classes[] = 'ontop';
3334                 }
3335
3336                 $attribs = [ 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) ];
3337
3338                 if ( $this->formtype != 'preview' ) {
3339                         $attribs['style'] = 'display: none;';
3340                 }
3341
3342                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
3343
3344                 if ( $this->formtype == 'preview' ) {
3345                         $this->showPreview( $previewOutput );
3346                 } else {
3347                         // Empty content container for LivePreview
3348                         $pageViewLang = $this->mTitle->getPageViewLanguage();
3349                         $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3350                                 'class' => 'mw-content-' . $pageViewLang->getDir() ];
3351                         $wgOut->addHTML( Html::rawElement( 'div', $attribs ) );
3352                 }
3353
3354                 $wgOut->addHTML( '</div>' );
3355
3356                 if ( $this->formtype == 'diff' ) {
3357                         try {
3358                                 $this->showDiff();
3359                         } catch ( MWContentSerializationException $ex ) {
3360                                 $msg = $this->context->msg(
3361                                         'content-failed-to-parse',
3362                                         $this->contentModel,
3363                                         $this->contentFormat,
3364                                         $ex->getMessage()
3365                                 );
3366                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3367                         }
3368                 }
3369         }
3370
3371         /**
3372          * Append preview output to $wgOut.
3373          * Includes category rendering if this is a category page.
3374          *
3375          * @param string $text The HTML to be output for the preview.
3376          */
3377         protected function showPreview( $text ) {
3378                 global $wgOut;
3379                 if ( $this->mArticle instanceof CategoryPage ) {
3380                         $this->mArticle->openShowCategory();
3381                 }
3382                 # This hook seems slightly odd here, but makes things more
3383                 # consistent for extensions.
3384                 Hooks::run( 'OutputPageBeforeHTML', [ &$wgOut, &$text ] );
3385                 $wgOut->addHTML( $text );
3386                 if ( $this->mArticle instanceof CategoryPage ) {
3387                         $this->mArticle->closeShowCategory();
3388                 }
3389         }
3390
3391         /**
3392          * Get a diff between the current contents of the edit box and the
3393          * version of the page we're editing from.
3394          *
3395          * If this is a section edit, we'll replace the section as for final
3396          * save and then make a comparison.
3397          */
3398         public function showDiff() {
3399                 global $wgUser, $wgContLang, $wgOut;
3400
3401                 $oldtitlemsg = 'currentrev';
3402                 # if message does not exist, show diff against the preloaded default
3403                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3404                         $oldtext = $this->mTitle->getDefaultMessageText();
3405                         if ( $oldtext !== false ) {
3406                                 $oldtitlemsg = 'defaultmessagetext';
3407                                 $oldContent = $this->toEditContent( $oldtext );
3408                         } else {
3409                                 $oldContent = null;
3410                         }
3411                 } else {
3412                         $oldContent = $this->getCurrentContent();
3413                 }
3414
3415                 $textboxContent = $this->toEditContent( $this->textbox1 );
3416                 if ( $this->editRevId !== null ) {
3417                         $newContent = $this->page->replaceSectionAtRev(
3418                                 $this->section, $textboxContent, $this->summary, $this->editRevId
3419                         );
3420                 } else {
3421                         $newContent = $this->page->replaceSectionContent(
3422                                 $this->section, $textboxContent, $this->summary, $this->edittime
3423                         );
3424                 }
3425
3426                 if ( $newContent ) {
3427                         Hooks::run( 'EditPageGetDiffContent', [ $this, &$newContent ] );
3428
3429                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
3430                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
3431                 }
3432
3433                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3434                         $oldtitle = $this->context->msg( $oldtitlemsg )->parse();
3435                         $newtitle = $this->context->msg( 'yourtext' )->parse();
3436
3437                         if ( !$oldContent ) {
3438                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3439                         }
3440
3441                         if ( !$newContent ) {
3442                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3443                         }
3444
3445                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
3446                         $de->setContent( $oldContent, $newContent );
3447
3448                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3449                         $de->showDiffStyle();
3450                 } else {
3451                         $difftext = '';
3452                 }
3453
3454                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3455         }
3456
3457         /**
3458          * Show the header copyright warning.
3459          */
3460         protected function showHeaderCopyrightWarning() {
3461                 $msg = 'editpage-head-copy-warn';
3462                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3463                         global $wgOut;
3464                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3465                                 'editpage-head-copy-warn' );
3466                 }
3467         }
3468
3469         /**
3470          * Give a chance for site and per-namespace customizations of
3471          * terms of service summary link that might exist separately
3472          * from the copyright notice.
3473          *
3474          * This will display between the save button and the edit tools,
3475          * so should remain short!
3476          */
3477         protected function showTosSummary() {
3478                 $msg = 'editpage-tos-summary';
3479                 Hooks::run( 'EditPageTosSummary', [ $this->mTitle, &$msg ] );
3480                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3481                         global $wgOut;
3482                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
3483                         $wgOut->addWikiMsg( $msg );
3484                         $wgOut->addHTML( '</div>' );
3485                 }
3486         }
3487
3488         /**
3489          * Inserts optional text shown below edit and upload forms. Can be used to offer special
3490          * characters not present on most keyboards for copying/pasting.
3491          */
3492         protected function showEditTools() {
3493                 global $wgOut;
3494                 $wgOut->addHTML( '<div class="mw-editTools">' .
3495                         $this->context->msg( 'edittools' )->inContentLanguage()->parse() .
3496                         '</div>' );
3497         }
3498
3499         /**
3500          * Get the copyright warning
3501          *
3502          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3503          * @return string
3504          */
3505         protected function getCopywarn() {
3506                 return self::getCopyrightWarning( $this->mTitle );
3507         }
3508
3509         /**
3510          * Get the copyright warning, by default returns wikitext
3511          *
3512          * @param Title $title
3513          * @param string $format Output format, valid values are any function of a Message object
3514          * @param Language|string|null $langcode Language code or Language object.
3515          * @return string
3516          */
3517         public static function getCopyrightWarning( $title, $format = 'plain', $langcode = null ) {
3518                 global $wgRightsText;
3519                 if ( $wgRightsText ) {
3520                         $copywarnMsg = [ 'copyrightwarning',
3521                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3522                                 $wgRightsText ];
3523                 } else {
3524                         $copywarnMsg = [ 'copyrightwarning2',
3525                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' ];
3526                 }
3527                 // Allow for site and per-namespace customization of contribution/copyright notice.
3528                 Hooks::run( 'EditPageCopyrightWarning', [ $title, &$copywarnMsg ] );
3529
3530                 $msg = call_user_func_array( 'wfMessage', $copywarnMsg )->title( $title );
3531                 if ( $langcode ) {
3532                         $msg->inLanguage( $langcode );
3533                 }
3534                 return "<div id=\"editpage-copywarn\">\n" .
3535                         $msg->$format() . "\n</div>";
3536         }
3537
3538         /**
3539          * Get the Limit report for page previews
3540          *
3541          * @since 1.22
3542          * @param ParserOutput $output ParserOutput object from the parse
3543          * @return string HTML
3544          */
3545         public static function getPreviewLimitReport( $output ) {
3546                 if ( !$output || !$output->getLimitReportData() ) {
3547                         return '';
3548                 }
3549
3550                 $limitReport = Html::rawElement( 'div', [ 'class' => 'mw-limitReportExplanation' ],
3551                         wfMessage( 'limitreport-title' )->parseAsBlock()
3552                 );
3553
3554                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3555                 $limitReport .= Html::openElement( 'div', [ 'class' => 'preview-limit-report-wrapper' ] );
3556
3557                 $limitReport .= Html::openElement( 'table', [
3558                         'class' => 'preview-limit-report wikitable'
3559                 ] ) .
3560                         Html::openElement( 'tbody' );
3561
3562                 foreach ( $output->getLimitReportData() as $key => $value ) {
3563                         if ( Hooks::run( 'ParserLimitReportFormat',
3564                                 [ $key, &$value, &$limitReport, true, true ]
3565                         ) ) {
3566                                 $keyMsg = wfMessage( $key );
3567                                 $valueMsg = wfMessage( [ "$key-value-html", "$key-value" ] );
3568                                 if ( !$valueMsg->exists() ) {
3569                                         $valueMsg = new RawMessage( '$1' );
3570                                 }
3571                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3572                                         $limitReport .= Html::openElement( 'tr' ) .
3573                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3574                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
3575                                                 Html::closeElement( 'tr' );
3576                                 }
3577                         }
3578                 }
3579
3580                 $limitReport .= Html::closeElement( 'tbody' ) .
3581                         Html::closeElement( 'table' ) .
3582                         Html::closeElement( 'div' );
3583
3584                 return $limitReport;
3585         }
3586
3587         protected function showStandardInputs( &$tabindex = 2 ) {
3588                 global $wgOut;
3589                 $wgOut->addHTML( "<div class='editOptions'>\n" );
3590
3591                 if ( $this->section != 'new' ) {
3592                         $this->showSummaryInput( false, $this->summary );
3593                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3594                 }
3595
3596                 $checkboxes = $this->getCheckboxesWidget(
3597                         $tabindex,
3598                         [ 'minor' => $this->minoredit, 'watch' => $this->watchthis ]
3599                 );
3600                 $checkboxesHTML = new OOUI\HorizontalLayout( [ 'items' => $checkboxes ] );
3601
3602                 $wgOut->addHTML( "<div class='editCheckboxes'>" . $checkboxesHTML . "</div>\n" );
3603
3604                 // Show copyright warning.
3605                 $wgOut->addWikiText( $this->getCopywarn() );
3606                 $wgOut->addHTML( $this->editFormTextAfterWarn );
3607
3608                 $wgOut->addHTML( "<div class='editButtons'>\n" );
3609                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3610
3611                 $cancel = $this->getCancelLink();
3612                 if ( $cancel !== '' ) {
3613                         $cancel .= Html::element( 'span',
3614                                 [ 'class' => 'mw-editButtons-pipe-separator' ],
3615                                 $this->context->msg( 'pipe-separator' )->text() );
3616                 }
3617
3618                 $message = $this->context->msg( 'edithelppage' )->inContentLanguage()->text();
3619                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3620                 $edithelp =
3621                         Html::linkButton(
3622                                 $this->context->msg( 'edithelp' )->text(),
3623                                 [ 'target' => 'helpwindow', 'href' => $edithelpurl ],
3624                                 [ 'mw-ui-quiet' ]
3625                         ) .
3626                         $this->context->msg( 'word-separator' )->escaped() .
3627                         $this->context->msg( 'newwindow' )->parse();
3628
3629                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
3630                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
3631                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
3632
3633                 Hooks::run( 'EditPage::showStandardInputs:options', [ $this, $wgOut, &$tabindex ] );
3634
3635                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
3636         }
3637
3638         /**
3639          * Show an edit conflict. textbox1 is already shown in showEditForm().
3640          * If you want to use another entry point to this function, be careful.
3641          */
3642         protected function showConflict() {
3643                 global $wgOut;
3644
3645                 // Avoid PHP 7.1 warning of passing $this by reference
3646                 $editPage = $this;
3647                 if ( Hooks::run( 'EditPageBeforeConflictDiff', [ &$editPage, &$wgOut ] ) ) {
3648                         $this->incrementConflictStats();
3649
3650                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3651
3652                         $content1 = $this->toEditContent( $this->textbox1 );
3653                         $content2 = $this->toEditContent( $this->textbox2 );
3654
3655                         $handler = ContentHandler::getForModelID( $this->contentModel );
3656                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3657                         $de->setContent( $content2, $content1 );
3658                         $de->showDiff(
3659                                 $this->context->msg( 'yourtext' )->parse(),
3660                                 $this->context->msg( 'storedversion' )->text()
3661                         );
3662
3663                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3664                         $this->showTextbox2();
3665                 }
3666         }
3667
3668         protected function incrementConflictStats() {
3669                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
3670                 $stats->increment( 'edit.failures.conflict' );
3671                 // Only include 'standard' namespaces to avoid creating unknown numbers of statsd metrics
3672                 if (
3673                         $this->mTitle->getNamespace() >= NS_MAIN &&
3674                         $this->mTitle->getNamespace() <= NS_CATEGORY_TALK
3675                 ) {
3676                         $stats->increment( 'edit.failures.conflict.byNamespaceId.' . $this->mTitle->getNamespace() );
3677                 }
3678         }
3679
3680         /**
3681          * @return string
3682          */
3683         public function getCancelLink() {
3684                 $cancelParams = [];
3685                 if ( !$this->isConflict && $this->oldid > 0 ) {
3686                         $cancelParams['oldid'] = $this->oldid;
3687                 } elseif ( $this->getContextTitle()->isRedirect() ) {
3688                         $cancelParams['redirect'] = 'no';
3689                 }
3690
3691                 return new OOUI\ButtonWidget( [
3692                         'id' => 'mw-editform-cancel',
3693                         'href' => $this->getContextTitle()->getLinkUrl( $cancelParams ),
3694                         'label' => new OOUI\HtmlSnippet( $this->context->msg( 'cancel' )->parse() ),
3695                         'framed' => false,
3696                         'infusable' => true,
3697                         'flags' => 'destructive',
3698                 ] );
3699         }
3700
3701         /**
3702          * Returns the URL to use in the form's action attribute.
3703          * This is used by EditPage subclasses when simply customizing the action
3704          * variable in the constructor is not enough. This can be used when the
3705          * EditPage lives inside of a Special page rather than a custom page action.
3706          *
3707          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3708          * @return string
3709          */
3710         protected function getActionURL( Title $title ) {
3711                 return $title->getLocalURL( [ 'action' => $this->action ] );
3712         }
3713
3714         /**
3715          * Check if a page was deleted while the user was editing it, before submit.
3716          * Note that we rely on the logging table, which hasn't been always there,
3717          * but that doesn't matter, because this only applies to brand new
3718          * deletes.
3719          * @return bool
3720          */
3721         protected function wasDeletedSinceLastEdit() {
3722                 if ( $this->deletedSinceEdit !== null ) {
3723                         return $this->deletedSinceEdit;
3724                 }
3725
3726                 $this->deletedSinceEdit = false;
3727
3728                 if ( !$this->mTitle->exists() && $this->mTitle->isDeletedQuick() ) {
3729                         $this->lastDelete = $this->getLastDelete();
3730                         if ( $this->lastDelete ) {
3731                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3732                                 if ( $deleteTime > $this->starttime ) {
3733                                         $this->deletedSinceEdit = true;
3734                                 }
3735                         }
3736                 }
3737
3738                 return $this->deletedSinceEdit;
3739         }
3740
3741         /**
3742          * @return bool|stdClass
3743          */
3744         protected function getLastDelete() {
3745                 $dbr = wfGetDB( DB_REPLICA );
3746                 $commentQuery = CommentStore::newKey( 'log_comment' )->getJoin();
3747                 $data = $dbr->selectRow(
3748                         [ 'logging', 'user' ] + $commentQuery['tables'],
3749                         [
3750                                 'log_type',
3751                                 'log_action',
3752                                 'log_timestamp',
3753                                 'log_user',
3754                                 'log_namespace',
3755                                 'log_title',
3756                                 'log_params',
3757                                 'log_deleted',
3758                                 'user_name'
3759                         ] + $commentQuery['fields'], [
3760                                 'log_namespace' => $this->mTitle->getNamespace(),
3761                                 'log_title' => $this->mTitle->getDBkey(),
3762                                 'log_type' => 'delete',
3763                                 'log_action' => 'delete',
3764                                 'user_id=log_user'
3765                         ],
3766                         __METHOD__,
3767                         [ 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ],
3768                         [
3769                                 'user' => [ 'JOIN', 'user_id=log_user' ],
3770                         ] + $commentQuery['joins']
3771                 );
3772                 // Quick paranoid permission checks...
3773                 if ( is_object( $data ) ) {
3774                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3775                                 $data->user_name = $this->context->msg( 'rev-deleted-user' )->escaped();
3776                         }
3777
3778                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3779                                 $data->log_comment_text = $this->context->msg( 'rev-deleted-comment' )->escaped();
3780                                 $data->log_comment_data = null;
3781                         }
3782                 }
3783
3784                 return $data;
3785         }
3786
3787         /**
3788          * Get the rendered text for previewing.
3789          * @throws MWException
3790          * @return string
3791          */
3792         public function getPreviewText() {
3793                 global $wgOut, $wgRawHtml, $wgLang;
3794                 global $wgAllowUserCss, $wgAllowUserJs;
3795
3796                 if ( $wgRawHtml && !$this->mTokenOk ) {
3797                         // Could be an offsite preview attempt. This is very unsafe if
3798                         // HTML is enabled, as it could be an attack.
3799                         $parsedNote = '';
3800                         if ( $this->textbox1 !== '' ) {
3801                                 // Do not put big scary notice, if previewing the empty
3802                                 // string, which happens when you initially edit
3803                                 // a category page, due to automatic preview-on-open.
3804                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3805                                         $this->context->msg( 'session_fail_preview_html' )->text() . "</div>",
3806                                         true, /* interface */true );
3807                         }
3808                         $this->incrementEditFailureStats( 'session_loss' );
3809                         return $parsedNote;
3810                 }
3811
3812                 $note = '';
3813
3814                 try {
3815                         $content = $this->toEditContent( $this->textbox1 );
3816
3817                         $previewHTML = '';
3818                         if ( !Hooks::run(
3819                                 'AlternateEditPreview',
3820                                 [ $this, &$content, &$previewHTML, &$this->mParserOutput ] )
3821                         ) {
3822                                 return $previewHTML;
3823                         }
3824
3825                         # provide a anchor link to the editform
3826                         $continueEditing = '<span class="mw-continue-editing">' .
3827                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3828                                 $this->context->msg( 'continue-editing' )->text() . ']]</span>';
3829                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3830                                 if ( $this->mTokenOkExceptSuffix ) {
3831                                         $note = $this->context->msg( 'token_suffix_mismatch' )->plain();
3832                                         $this->incrementEditFailureStats( 'bad_token' );
3833                                 } else {
3834                                         $note = $this->context->msg( 'session_fail_preview' )->plain();
3835                                         $this->incrementEditFailureStats( 'session_loss' );
3836                                 }
3837                         } elseif ( $this->incompleteForm ) {
3838                                 $note = $this->context->msg( 'edit_form_incomplete' )->plain();
3839                                 if ( $this->mTriedSave ) {
3840                                         $this->incrementEditFailureStats( 'incomplete_form' );
3841                                 }
3842                         } else {
3843                                 $note = $this->context->msg( 'previewnote' )->plain() . ' ' . $continueEditing;
3844                         }
3845
3846                         # don't parse non-wikitext pages, show message about preview
3847                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3848                                 if ( $this->mTitle->isCssJsSubpage() ) {
3849                                         $level = 'user';
3850                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3851                                         $level = 'site';
3852                                 } else {
3853                                         $level = false;
3854                                 }
3855
3856                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3857                                         $format = 'css';
3858                                         if ( $level === 'user' && !$wgAllowUserCss ) {
3859                                                 $format = false;
3860                                         }
3861                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3862                                         $format = 'js';
3863                                         if ( $level === 'user' && !$wgAllowUserJs ) {
3864                                                 $format = false;
3865                                         }
3866                                 } else {
3867                                         $format = false;
3868                                 }
3869
3870                                 # Used messages to make sure grep find them:
3871                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3872                                 if ( $level && $format ) {
3873                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3874                                                 $this->context->msg( "{$level}{$format}preview" )->text() .
3875                                                 ' ' . $continueEditing . "</div>";
3876                                 }
3877                         }
3878
3879                         # If we're adding a comment, we need to show the
3880                         # summary as the headline
3881                         if ( $this->section === "new" && $this->summary !== "" ) {
3882                                 $content = $content->addSectionHeader( $this->summary );
3883                         }
3884
3885                         $hook_args = [ $this, &$content ];
3886                         Hooks::run( 'EditPageGetPreviewContent', $hook_args );
3887
3888                         $parserResult = $this->doPreviewParse( $content );
3889                         $parserOutput = $parserResult['parserOutput'];
3890                         $previewHTML = $parserResult['html'];
3891                         $this->mParserOutput = $parserOutput;
3892                         $wgOut->addParserOutputMetadata( $parserOutput );
3893
3894                         if ( count( $parserOutput->getWarnings() ) ) {
3895                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3896                         }
3897
3898                 } catch ( MWContentSerializationException $ex ) {
3899                         $m = $this->context->msg(
3900                                 'content-failed-to-parse',
3901                                 $this->contentModel,
3902                                 $this->contentFormat,
3903                                 $ex->getMessage()
3904                         );
3905                         $note .= "\n\n" . $m->parse();
3906                         $previewHTML = '';
3907                 }
3908
3909                 if ( $this->isConflict ) {
3910                         $conflict = '<h2 id="mw-previewconflict">'
3911                                 . $this->context->msg( 'previewconflict' )->escaped() . "</h2>\n";
3912                 } else {
3913                         $conflict = '<hr />';
3914                 }
3915
3916                 $previewhead = "<div class='previewnote'>\n" .
3917                         '<h2 id="mw-previewheader">' . $this->context->msg( 'preview' )->escaped() . "</h2>" .
3918                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3919
3920                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3921                 $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3922                         'class' => 'mw-content-' . $pageViewLang->getDir() ];
3923                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3924
3925                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3926         }
3927
3928         private function incrementEditFailureStats( $failureType ) {
3929                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
3930                 $stats->increment( 'edit.failures.' . $failureType );
3931         }
3932
3933         /**
3934          * Get parser options for a preview
3935          * @return ParserOptions
3936          */
3937         protected function getPreviewParserOptions() {
3938                 $parserOptions = $this->page->makeParserOptions( $this->mArticle->getContext() );
3939                 $parserOptions->setIsPreview( true );
3940                 $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3941                 $parserOptions->enableLimitReport();
3942                 return $parserOptions;
3943         }
3944
3945         /**
3946          * Parse the page for a preview. Subclasses may override this class, in order
3947          * to parse with different options, or to otherwise modify the preview HTML.
3948          *
3949          * @param Content $content The page content
3950          * @return array with keys:
3951          *   - parserOutput: The ParserOutput object
3952          *   - html: The HTML to be displayed
3953          */
3954         protected function doPreviewParse( Content $content ) {
3955                 global $wgUser;
3956                 $parserOptions = $this->getPreviewParserOptions();
3957                 $pstContent = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3958                 $scopedCallback = $parserOptions->setupFakeRevision(
3959                         $this->mTitle, $pstContent, $wgUser );
3960                 $parserOutput = $pstContent->getParserOutput( $this->mTitle, null, $parserOptions );
3961                 ScopedCallback::consume( $scopedCallback );
3962                 $parserOutput->setEditSectionTokens( false ); // no section edit links
3963                 return [
3964                         'parserOutput' => $parserOutput,
3965                         'html' => $parserOutput->getText() ];
3966         }
3967
3968         /**
3969          * @return array
3970          */
3971         public function getTemplates() {
3972                 if ( $this->preview || $this->section != '' ) {
3973                         $templates = [];
3974                         if ( !isset( $this->mParserOutput ) ) {
3975                                 return $templates;
3976                         }
3977                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3978                                 foreach ( array_keys( $template ) as $dbk ) {
3979                                         $templates[] = Title::makeTitle( $ns, $dbk );
3980                                 }
3981                         }
3982                         return $templates;
3983                 } else {
3984                         return $this->mTitle->getTemplateLinksFrom();
3985                 }
3986         }
3987
3988         /**
3989          * Shows a bulletin board style toolbar for common editing functions.
3990          * It can be disabled in the user preferences.
3991          *
3992          * @param Title $title Title object for the page being edited (optional)
3993          * @return string
3994          */
3995         public static function getEditToolbar( $title = null ) {
3996                 global $wgContLang, $wgOut;
3997                 global $wgEnableUploads, $wgForeignFileRepos;
3998
3999                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
4000                 $showSignature = true;
4001                 if ( $title ) {
4002                         $showSignature = MWNamespace::wantSignatures( $title->getNamespace() );
4003                 }
4004
4005                 /**
4006                  * $toolarray is an array of arrays each of which includes the
4007                  * opening tag, the closing tag, optionally a sample text that is
4008                  * inserted between the two when no selection is highlighted
4009                  * and.  The tip text is shown when the user moves the mouse
4010                  * over the button.
4011                  *
4012                  * Images are defined in ResourceLoaderEditToolbarModule.
4013                  */
4014                 $toolarray = [
4015                         [
4016                                 'id'     => 'mw-editbutton-bold',
4017                                 'open'   => '\'\'\'',
4018                                 'close'  => '\'\'\'',
4019                                 'sample' => wfMessage( 'bold_sample' )->text(),
4020                                 'tip'    => wfMessage( 'bold_tip' )->text(),
4021                         ],
4022                         [
4023                                 'id'     => 'mw-editbutton-italic',
4024                                 'open'   => '\'\'',
4025                                 'close'  => '\'\'',
4026                                 'sample' => wfMessage( 'italic_sample' )->text(),
4027                                 'tip'    => wfMessage( 'italic_tip' )->text(),
4028                         ],
4029                         [
4030                                 'id'     => 'mw-editbutton-link',
4031                                 'open'   => '[[',
4032                                 'close'  => ']]',
4033                                 'sample' => wfMessage( 'link_sample' )->text(),
4034                                 'tip'    => wfMessage( 'link_tip' )->text(),
4035                         ],
4036                         [
4037                                 'id'     => 'mw-editbutton-extlink',
4038                                 'open'   => '[',
4039                                 'close'  => ']',
4040                                 'sample' => wfMessage( 'extlink_sample' )->text(),
4041                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
4042                         ],
4043                         [
4044                                 'id'     => 'mw-editbutton-headline',
4045                                 'open'   => "\n== ",
4046                                 'close'  => " ==\n",
4047                                 'sample' => wfMessage( 'headline_sample' )->text(),
4048                                 'tip'    => wfMessage( 'headline_tip' )->text(),
4049                         ],
4050                         $imagesAvailable ? [
4051                                 'id'     => 'mw-editbutton-image',
4052                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
4053                                 'close'  => ']]',
4054                                 'sample' => wfMessage( 'image_sample' )->text(),
4055                                 'tip'    => wfMessage( 'image_tip' )->text(),
4056                         ] : false,
4057                         $imagesAvailable ? [
4058                                 'id'     => 'mw-editbutton-media',
4059                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
4060                                 'close'  => ']]',
4061                                 'sample' => wfMessage( 'media_sample' )->text(),
4062                                 'tip'    => wfMessage( 'media_tip' )->text(),
4063                         ] : false,
4064                         [
4065                                 'id'     => 'mw-editbutton-nowiki',
4066                                 'open'   => "<nowiki>",
4067                                 'close'  => "</nowiki>",
4068                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
4069                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
4070                         ],
4071                         $showSignature ? [
4072                                 'id'     => 'mw-editbutton-signature',
4073                                 'open'   => wfMessage( 'sig-text', '~~~~' )->inContentLanguage()->text(),
4074                                 'close'  => '',
4075                                 'sample' => '',
4076                                 'tip'    => wfMessage( 'sig_tip' )->text(),
4077                         ] : false,
4078                         [
4079                                 'id'     => 'mw-editbutton-hr',
4080                                 'open'   => "\n----\n",
4081                                 'close'  => '',
4082                                 'sample' => '',
4083                                 'tip'    => wfMessage( 'hr_tip' )->text(),
4084                         ]
4085                 ];
4086
4087                 $script = 'mw.loader.using("mediawiki.toolbar", function () {';
4088                 foreach ( $toolarray as $tool ) {
4089                         if ( !$tool ) {
4090                                 continue;
4091                         }
4092
4093                         $params = [
4094                                 // Images are defined in ResourceLoaderEditToolbarModule
4095                                 false,
4096                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
4097                                 // Older browsers show a "speedtip" type message only for ALT.
4098                                 // Ideally these should be different, realistically they
4099                                 // probably don't need to be.
4100                                 $tool['tip'],
4101                                 $tool['open'],
4102                                 $tool['close'],
4103                                 $tool['sample'],
4104                                 $tool['id'],
4105                         ];
4106
4107                         $script .= Xml::encodeJsCall(
4108                                 'mw.toolbar.addButton',
4109                                 $params,
4110                                 ResourceLoader::inDebugMode()
4111                         );
4112                 }
4113
4114                 $script .= '});';
4115
4116                 $toolbar = '<div id="toolbar"></div>';
4117
4118                 if ( Hooks::run( 'EditPageBeforeEditToolbar', [ &$toolbar ] ) ) {
4119                         // Only add the old toolbar cruft to the page payload if the toolbar has not
4120                         // been over-written by a hook caller
4121                         $wgOut->addScript( ResourceLoader::makeInlineScript( $script ) );
4122                 };
4123
4124                 return $toolbar;
4125         }
4126
4127         /**
4128          * Return an array of checkbox definitions.
4129          *
4130          * Array keys correspond to the `<input>` 'name' attribute to use for each checkbox.
4131          *
4132          * Array values are associative arrays with the following keys:
4133          *  - 'label-message' (required): message for label text
4134          *  - 'id' (required): 'id' attribute for the `<input>`
4135          *  - 'default' (required): default checkedness (true or false)
4136          *  - 'title-message' (optional): used to generate 'title' attribute for the `<label>`
4137          *  - 'tooltip' (optional): used to generate 'title' and 'accesskey' attributes
4138          *    from messages like 'tooltip-foo', 'accesskey-foo'
4139          *  - 'label-id' (optional): 'id' attribute for the `<label>`
4140          *  - 'legacy-name' (optional): short name for backwards-compatibility
4141          * @param array $checked Array of checkbox name (matching the 'legacy-name') => bool,
4142          *   where bool indicates the checked status of the checkbox
4143          * @return array
4144          */
4145         public function getCheckboxesDefinition( $checked ) {
4146                 global $wgUser;
4147                 $checkboxes = [];
4148
4149                 // don't show the minor edit checkbox if it's a new page or section
4150                 if ( !$this->isNew && $wgUser->isAllowed( 'minoredit' ) ) {
4151                         $checkboxes['wpMinoredit'] = [
4152                                 'id' => 'wpMinoredit',
4153                                 'label-message' => 'minoredit',
4154                                 // Uses messages: tooltip-minoredit, accesskey-minoredit
4155                                 'tooltip' => 'minoredit',
4156                                 'label-id' => 'mw-editpage-minoredit',
4157                                 'legacy-name' => 'minor',
4158                                 'default' => $checked['minor'],
4159                         ];
4160                 }
4161
4162                 if ( $wgUser->isLoggedIn() ) {
4163                         $checkboxes['wpWatchthis'] = [
4164                                 'id' => 'wpWatchthis',
4165                                 'label-message' => 'watchthis',
4166                                 // Uses messages: tooltip-watch, accesskey-watch
4167                                 'tooltip' => 'watch',
4168                                 'label-id' => 'mw-editpage-watch',
4169                                 'legacy-name' => 'watch',
4170                                 'default' => $checked['watch'],
4171                         ];
4172                 }
4173
4174                 $editPage = $this;
4175                 Hooks::run( 'EditPageGetCheckboxesDefinition', [ $editPage, &$checkboxes ] );
4176
4177                 return $checkboxes;
4178         }
4179
4180         /**
4181          * Returns an array of html code of the following checkboxes old style:
4182          * minor and watch
4183          *
4184          * @deprecated since 1.30 Use getCheckboxesWidget() or getCheckboxesDefinition() instead
4185          * @param int &$tabindex Current tabindex
4186          * @param array $checked See getCheckboxesDefinition()
4187          * @return array
4188          */
4189         public function getCheckboxes( &$tabindex, $checked ) {
4190                 global $wgUseMediaWikiUIEverywhere;
4191
4192                 $checkboxes = [];
4193                 $checkboxesDef = $this->getCheckboxesDefinition( $checked );
4194
4195                 // Backwards-compatibility for the EditPageBeforeEditChecks hook
4196                 if ( !$this->isNew ) {
4197                         $checkboxes['minor'] = '';
4198                 }
4199                 $checkboxes['watch'] = '';
4200
4201                 foreach ( $checkboxesDef as $name => $options ) {
4202                         $legacyName = isset( $options['legacy-name'] ) ? $options['legacy-name'] : $name;
4203                         $label = $this->context->msg( $options['label-message'] )->parse();
4204                         $attribs = [
4205                                 'tabindex' => ++$tabindex,
4206                                 'id' => $options['id'],
4207                         ];
4208                         $labelAttribs = [
4209                                 'for' => $options['id'],
4210                         ];
4211                         if ( isset( $options['tooltip'] ) ) {
4212                                 $attribs['accesskey'] = $this->context->msg( "accesskey-{$options['tooltip']}" )->text();
4213                                 $labelAttribs['title'] = Linker::titleAttrib( $options['tooltip'], 'withaccess' );
4214                         }
4215                         if ( isset( $options['title-message'] ) ) {
4216                                 $labelAttribs['title'] = $this->context->msg( $options['title-message'] )->text();
4217                         }
4218                         if ( isset( $options['label-id'] ) ) {
4219                                 $labelAttribs['id'] = $options['label-id'];
4220                         }
4221                         $checkboxHtml =
4222                                 Xml::check( $name, $options['default'], $attribs ) .
4223                                 '&#160;' .
4224                                 Xml::tags( 'label', $labelAttribs, $label );
4225
4226                         if ( $wgUseMediaWikiUIEverywhere ) {
4227                                 $checkboxHtml = Html::rawElement( 'div', [ 'class' => 'mw-ui-checkbox' ], $checkboxHtml );
4228                         }
4229
4230                         $checkboxes[ $legacyName ] = $checkboxHtml;
4231                 }
4232
4233                 // Avoid PHP 7.1 warning of passing $this by reference
4234                 $editPage = $this;
4235                 Hooks::run( 'EditPageBeforeEditChecks', [ &$editPage, &$checkboxes, &$tabindex ], '1.29' );
4236                 return $checkboxes;
4237         }
4238
4239         /**
4240          * Returns an array of checkboxes for the edit form, including 'minor' and 'watch' checkboxes and
4241          * any other added by extensions.
4242          *
4243          * @deprecated since 1.30 Use getCheckboxesWidget() or getCheckboxesDefinition() instead
4244          * @param int &$tabindex Current tabindex
4245          * @param array $checked Array of checkbox => bool, where bool indicates the checked
4246          *                 status of the checkbox
4247          *
4248          * @return array Associative array of string keys to OOUI\FieldLayout instances
4249          */
4250         public function getCheckboxesOOUI( &$tabindex, $checked ) {
4251                 return $this->getCheckboxesWidget( $tabindex, $checked );
4252         }
4253
4254         /**
4255          * Returns an array of checkboxes for the edit form, including 'minor' and 'watch' checkboxes and
4256          * any other added by extensions.
4257          *
4258          * @param int &$tabindex Current tabindex
4259          * @param array $checked Array of checkbox => bool, where bool indicates the checked
4260          *                 status of the checkbox
4261          *
4262          * @return array Associative array of string keys to OOUI\FieldLayout instances
4263          */
4264         public function getCheckboxesWidget( &$tabindex, $checked ) {
4265                 $checkboxes = [];
4266                 $checkboxesDef = $this->getCheckboxesDefinition( $checked );
4267
4268                 foreach ( $checkboxesDef as $name => $options ) {
4269                         $legacyName = isset( $options['legacy-name'] ) ? $options['legacy-name'] : $name;
4270
4271                         $title = null;
4272                         $accesskey = null;
4273                         if ( isset( $options['tooltip'] ) ) {
4274                                 $accesskey = $this->context->msg( "accesskey-{$options['tooltip']}" )->text();
4275                                 $title = Linker::titleAttrib( $options['tooltip'] );
4276                         }
4277                         if ( isset( $options['title-message'] ) ) {
4278                                 $title = $this->context->msg( $options['title-message'] )->text();
4279                         }
4280
4281                         $checkboxes[ $legacyName ] = new OOUI\FieldLayout(
4282                                 new OOUI\CheckboxInputWidget( [
4283                                         'tabIndex' => ++$tabindex,
4284                                         'accessKey' => $accesskey,
4285                                         'id' => $options['id'] . 'Widget',
4286                                         'inputId' => $options['id'],
4287                                         'name' => $name,
4288                                         'selected' => $options['default'],
4289                                         'infusable' => true,
4290                                 ] ),
4291                                 [
4292                                         'align' => 'inline',
4293                                         'label' => new OOUI\HtmlSnippet( $this->context->msg( $options['label-message'] )->parse() ),
4294                                         'title' => $title,
4295                                         'id' => isset( $options['label-id'] ) ? $options['label-id'] : null,
4296                                 ]
4297                         );
4298                 }
4299
4300                 // Backwards-compatibility hack to run the EditPageBeforeEditChecks hook. It's important,
4301                 // people have used it for the weirdest things completely unrelated to checkboxes...
4302                 // And if we're gonna run it, might as well allow its legacy checkboxes to be shown.
4303                 $legacyCheckboxes = [];
4304                 if ( !$this->isNew ) {
4305                         $legacyCheckboxes['minor'] = '';
4306                 }
4307                 $legacyCheckboxes['watch'] = '';
4308                 // Copy new-style checkboxes into an old-style structure
4309                 foreach ( $checkboxes as $name => $oouiLayout ) {
4310                         $legacyCheckboxes[$name] = (string)$oouiLayout;
4311                 }
4312                 // Avoid PHP 7.1 warning of passing $this by reference
4313                 $ep = $this;
4314                 Hooks::run( 'EditPageBeforeEditChecks', [ &$ep, &$legacyCheckboxes, &$tabindex ], '1.29' );
4315                 // Copy back any additional old-style checkboxes into the new-style structure
4316                 foreach ( $legacyCheckboxes as $name => $html ) {
4317                         if ( $html && !isset( $checkboxes[$name] ) ) {
4318                                 $checkboxes[$name] = new OOUI\Widget( [ 'content' => new OOUI\HtmlSnippet( $html ) ] );
4319                         }
4320                 }
4321
4322                 return $checkboxes;
4323         }
4324
4325         /**
4326          * Get the message key of the label for the button to save the page
4327          *
4328          * @return string
4329          */
4330         private function getSaveButtonLabel() {
4331                 $labelAsPublish =
4332                         $this->mArticle->getContext()->getConfig()->get( 'EditSubmitButtonLabelPublish' );
4333
4334                 // Can't use $this->isNew as that's also true if we're adding a new section to an extant page
4335                 $newPage = !$this->mTitle->exists();
4336
4337                 if ( $labelAsPublish ) {
4338                         $buttonLabelKey = $newPage ? 'publishpage' : 'publishchanges';
4339                 } else {
4340                         $buttonLabelKey = $newPage ? 'savearticle' : 'savechanges';
4341                 }
4342
4343                 return $buttonLabelKey;
4344         }
4345
4346         /**
4347          * Returns an array of html code of the following buttons:
4348          * save, diff and preview
4349          *
4350          * @param int &$tabindex Current tabindex
4351          *
4352          * @return array
4353          */
4354         public function getEditButtons( &$tabindex ) {
4355                 $buttons = [];
4356
4357                 $buttonLabel = $this->context->msg( $this->getSaveButtonLabel() )->text();
4358
4359                 $attribs = [
4360                         'name' => 'wpSave',
4361                         'tabindex' => ++$tabindex,
4362                 ];
4363
4364                 $saveConfig = OOUI\Element::configFromHtmlAttributes( $attribs );
4365                 $buttons['save'] = new OOUI\ButtonInputWidget( [
4366                         'id' => 'wpSaveWidget',
4367                         'inputId' => 'wpSave',
4368                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4369                         'useInputTag' => true,
4370                         'flags' => [ 'constructive', 'primary' ],
4371                         'label' => $buttonLabel,
4372                         'infusable' => true,
4373                         'type' => 'submit',
4374                         'title' => Linker::titleAttrib( 'save' ),
4375                         'accessKey' => Linker::accesskey( 'save' ),
4376                 ] + $saveConfig );
4377
4378                 $attribs = [
4379                         'name' => 'wpPreview',
4380                         'tabindex' => ++$tabindex,
4381                 ];
4382
4383                 $previewConfig = OOUI\Element::configFromHtmlAttributes( $attribs );
4384                 $buttons['preview'] = new OOUI\ButtonInputWidget( [
4385                         'id' => 'wpPreviewWidget',
4386                         'inputId' => 'wpPreview',
4387                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4388                         'useInputTag' => true,
4389                         'label' => $this->context->msg( 'showpreview' )->text(),
4390                         'infusable' => true,
4391                         'type' => 'submit',
4392                         'title' => Linker::titleAttrib( 'preview' ),
4393                         'accessKey' => Linker::accesskey( 'preview' ),
4394                 ] + $previewConfig );
4395
4396                 $attribs = [
4397                         'name' => 'wpDiff',
4398                         'tabindex' => ++$tabindex,
4399                 ];
4400
4401                 $diffConfig = OOUI\Element::configFromHtmlAttributes( $attribs );
4402                 $buttons['diff'] = new OOUI\ButtonInputWidget( [
4403                         'id' => 'wpDiffWidget',
4404                         'inputId' => 'wpDiff',
4405                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4406                         'useInputTag' => true,
4407                         'label' => $this->context->msg( 'showdiff' )->text(),
4408                         'infusable' => true,
4409                         'type' => 'submit',
4410                         'title' => Linker::titleAttrib( 'diff' ),
4411                         'accessKey' => Linker::accesskey( 'diff' ),
4412                 ] + $diffConfig );
4413
4414                 // Avoid PHP 7.1 warning of passing $this by reference
4415                 $editPage = $this;
4416                 Hooks::run( 'EditPageBeforeEditButtons', [ &$editPage, &$buttons, &$tabindex ] );
4417
4418                 return $buttons;
4419         }
4420
4421         /**
4422          * Creates a basic error page which informs the user that
4423          * they have attempted to edit a nonexistent section.
4424          */
4425         public function noSuchSectionPage() {
4426                 global $wgOut;
4427
4428                 $wgOut->prepareErrorPage( $this->context->msg( 'nosuchsectiontitle' ) );
4429
4430                 $res = $this->context->msg( 'nosuchsectiontext', $this->section )->parseAsBlock();
4431
4432                 // Avoid PHP 7.1 warning of passing $this by reference
4433                 $editPage = $this;
4434                 Hooks::run( 'EditPageNoSuchSection', [ &$editPage, &$res ] );
4435                 $wgOut->addHTML( $res );
4436
4437                 $wgOut->returnToMain( false, $this->mTitle );
4438         }
4439
4440         /**
4441          * Show "your edit contains spam" page with your diff and text
4442          *
4443          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
4444          */
4445         public function spamPageWithContent( $match = false ) {
4446                 global $wgOut, $wgLang;
4447                 $this->textbox2 = $this->textbox1;
4448
4449                 if ( is_array( $match ) ) {
4450                         $match = $wgLang->listToText( $match );
4451                 }
4452                 $wgOut->prepareErrorPage( $this->context->msg( 'spamprotectiontitle' ) );
4453
4454                 $wgOut->addHTML( '<div id="spamprotected">' );
4455                 $wgOut->addWikiMsg( 'spamprotectiontext' );
4456                 if ( $match ) {
4457                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
4458                 }
4459                 $wgOut->addHTML( '</div>' );
4460
4461                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
4462                 $this->showDiff();
4463
4464                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
4465                 $this->showTextbox2();
4466
4467                 $wgOut->addReturnTo( $this->getContextTitle(), [ 'action' => 'edit' ] );
4468         }
4469
4470         /**
4471          * Check if the browser is on a blacklist of user-agents known to
4472          * mangle UTF-8 data on form submission. Returns true if Unicode
4473          * should make it through, false if it's known to be a problem.
4474          * @return bool
4475          */
4476         private function checkUnicodeCompliantBrowser() {
4477                 global $wgBrowserBlackList, $wgRequest;
4478
4479                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
4480                 if ( $currentbrowser === false ) {
4481                         // No User-Agent header sent? Trust it by default...
4482                         return true;
4483                 }
4484
4485                 foreach ( $wgBrowserBlackList as $browser ) {
4486                         if ( preg_match( $browser, $currentbrowser ) ) {
4487                                 return false;
4488                         }
4489                 }
4490                 return true;
4491         }
4492
4493         /**
4494          * Filter an input field through a Unicode de-armoring process if it
4495          * came from an old browser with known broken Unicode editing issues.
4496          *
4497          * @param WebRequest $request
4498          * @param string $field
4499          * @return string
4500          */
4501         protected function safeUnicodeInput( $request, $field ) {
4502                 $text = rtrim( $request->getText( $field ) );
4503                 return $request->getBool( 'safemode' )
4504                         ? $this->unmakeSafe( $text )
4505                         : $text;
4506         }
4507
4508         /**
4509          * Filter an output field through a Unicode armoring process if it is
4510          * going to an old browser with known broken Unicode editing issues.
4511          *
4512          * @param string $text
4513          * @return string
4514          */
4515         protected function safeUnicodeOutput( $text ) {
4516                 return $this->checkUnicodeCompliantBrowser()
4517                         ? $text
4518                         : $this->makeSafe( $text );
4519         }
4520
4521         /**
4522          * A number of web browsers are known to corrupt non-ASCII characters
4523          * in a UTF-8 text editing environment. To protect against this,
4524          * detected browsers will be served an armored version of the text,
4525          * with non-ASCII chars converted to numeric HTML character references.
4526          *
4527          * Preexisting such character references will have a 0 added to them
4528          * to ensure that round-trips do not alter the original data.
4529          *
4530          * @param string $invalue
4531          * @return string
4532          */
4533         private function makeSafe( $invalue ) {
4534                 // Armor existing references for reversibility.
4535                 $invalue = strtr( $invalue, [ "&#x" => "&#x0" ] );
4536
4537                 $bytesleft = 0;
4538                 $result = "";
4539                 $working = 0;
4540                 $valueLength = strlen( $invalue );
4541                 for ( $i = 0; $i < $valueLength; $i++ ) {
4542                         $bytevalue = ord( $invalue[$i] );
4543                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
4544                                 $result .= chr( $bytevalue );
4545                                 $bytesleft = 0;
4546                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
4547                                 $working = $working << 6;
4548                                 $working += ( $bytevalue & 0x3F );
4549                                 $bytesleft--;
4550                                 if ( $bytesleft <= 0 ) {
4551                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
4552                                 }
4553                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
4554                                 $working = $bytevalue & 0x1F;
4555                                 $bytesleft = 1;
4556                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
4557                                 $working = $bytevalue & 0x0F;
4558                                 $bytesleft = 2;
4559                         } else { // 1111 0xxx
4560                                 $working = $bytevalue & 0x07;
4561                                 $bytesleft = 3;
4562                         }
4563                 }
4564                 return $result;
4565         }
4566
4567         /**
4568          * Reverse the previously applied transliteration of non-ASCII characters
4569          * back to UTF-8. Used to protect data from corruption by broken web browsers
4570          * as listed in $wgBrowserBlackList.
4571          *
4572          * @param string $invalue
4573          * @return string
4574          */
4575         private function unmakeSafe( $invalue ) {
4576                 $result = "";
4577                 $valueLength = strlen( $invalue );
4578                 for ( $i = 0; $i < $valueLength; $i++ ) {
4579                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
4580                                 $i += 3;
4581                                 $hexstring = "";
4582                                 do {
4583                                         $hexstring .= $invalue[$i];
4584                                         $i++;
4585                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
4586
4587                                 // Do some sanity checks. These aren't needed for reversibility,
4588                                 // but should help keep the breakage down if the editor
4589                                 // breaks one of the entities whilst editing.
4590                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) && ( strlen( $hexstring ) <= 6 ) ) {
4591                                         $codepoint = hexdec( $hexstring );
4592                                         $result .= UtfNormal\Utils::codepointToUtf8( $codepoint );
4593                                 } else {
4594                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
4595                                 }
4596                         } else {
4597                                 $result .= substr( $invalue, $i, 1 );
4598                         }
4599                 }
4600                 // reverse the transform that we made for reversibility reasons.
4601                 return strtr( $result, [ "&#x0" => "&#x" ] );
4602         }
4603
4604         /**
4605          * @since 1.29
4606          */
4607         protected function addEditNotices() {
4608                 global $wgOut;
4609
4610                 $editNotices = $this->mTitle->getEditNotices( $this->oldid );
4611                 if ( count( $editNotices ) ) {
4612                         $wgOut->addHTML( implode( "\n", $editNotices ) );
4613                 } else {
4614                         $msg = $this->context->msg( 'editnotice-notext' );
4615                         if ( !$msg->isDisabled() ) {
4616                                 $wgOut->addHTML(
4617                                         '<div class="mw-editnotice-notext">'
4618                                         . $msg->parseAsBlock()
4619                                         . '</div>'
4620                                 );
4621                         }
4622                 }
4623         }
4624
4625         /**
4626          * @since 1.29
4627          */
4628         protected function addTalkPageText() {
4629                 global $wgOut;
4630
4631                 if ( $this->mTitle->isTalkPage() ) {
4632                         $wgOut->addWikiMsg( 'talkpagetext' );
4633                 }
4634         }
4635
4636         /**
4637          * @since 1.29
4638          */
4639         protected function addLongPageWarningHeader() {
4640                 global $wgMaxArticleSize, $wgOut, $wgLang;
4641
4642                 if ( $this->contentLength === false ) {
4643                         $this->contentLength = strlen( $this->textbox1 );
4644                 }
4645
4646                 if ( $this->tooBig || $this->contentLength > $wgMaxArticleSize * 1024 ) {
4647                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
4648                                 [
4649                                         'longpageerror',
4650                                         $wgLang->formatNum( round( $this->contentLength / 1024, 3 ) ),
4651                                         $wgLang->formatNum( $wgMaxArticleSize )
4652                                 ]
4653                         );
4654                 } else {
4655                         if ( !$this->context->msg( 'longpage-hint' )->isDisabled() ) {
4656                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
4657                                         [
4658                                                 'longpage-hint',
4659                                                 $wgLang->formatSize( strlen( $this->textbox1 ) ),
4660                                                 strlen( $this->textbox1 )
4661                                         ]
4662                                 );
4663                         }
4664                 }
4665         }
4666
4667         /**
4668          * @since 1.29
4669          */
4670         protected function addPageProtectionWarningHeaders() {
4671                 global $wgOut;
4672
4673                 if ( $this->mTitle->isProtected( 'edit' ) &&
4674                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
4675                 ) {
4676                         # Is the title semi-protected?
4677                         if ( $this->mTitle->isSemiProtected() ) {
4678                                 $noticeMsg = 'semiprotectedpagewarning';
4679                         } else {
4680                                 # Then it must be protected based on static groups (regular)
4681                                 $noticeMsg = 'protectedpagewarning';
4682                         }
4683                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
4684                                 [ 'lim' => 1, 'msgKey' => [ $noticeMsg ] ] );
4685                 }
4686                 if ( $this->mTitle->isCascadeProtected() ) {
4687                         # Is this page under cascading protection from some source pages?
4688                         /** @var Title[] $cascadeSources */
4689                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
4690                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
4691                         $cascadeSourcesCount = count( $cascadeSources );
4692                         if ( $cascadeSourcesCount > 0 ) {
4693                                 # Explain, and list the titles responsible
4694                                 foreach ( $cascadeSources as $page ) {
4695                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
4696                                 }
4697                         }
4698                         $notice .= '</div>';
4699                         $wgOut->wrapWikiMsg( $notice, [ 'cascadeprotectedwarning', $cascadeSourcesCount ] );
4700                 }
4701                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
4702                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
4703                                 [ 'lim' => 1,
4704                                         'showIfEmpty' => false,
4705                                         'msgKey' => [ 'titleprotectedwarning' ],
4706                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ] );
4707                 }
4708         }
4709
4710         /**
4711          * @param OutputPage $out
4712          * @since 1.29
4713          */
4714         protected function addExplainConflictHeader( OutputPage $out ) {
4715                 $out->wrapWikiMsg(
4716                         "<div class='mw-explainconflict'>\n$1\n</div>",
4717                         [ 'explainconflict', $this->context->msg( $this->getSaveButtonLabel() )->text() ]
4718                 );
4719         }
4720
4721         /**
4722          * @param string $name
4723          * @param mixed[] $customAttribs
4724          * @param User $user
4725          * @return mixed[]
4726          * @since 1.29
4727          */
4728         protected function buildTextboxAttribs( $name, array $customAttribs, User $user ) {
4729                 $attribs = $customAttribs + [
4730                                 'accesskey' => ',',
4731                                 'id' => $name,
4732                                 'cols' => 80,
4733                                 'rows' => 25,
4734                                 // Avoid PHP notices when appending preferences
4735                                 // (appending allows customAttribs['style'] to still work).
4736                                 'style' => ''
4737                         ];
4738
4739                 // The following classes can be used here:
4740                 // * mw-editfont-default
4741                 // * mw-editfont-monospace
4742                 // * mw-editfont-sans-serif
4743                 // * mw-editfont-serif
4744                 $class = 'mw-editfont-' . $user->getOption( 'editfont' );
4745
4746                 if ( isset( $attribs['class'] ) ) {
4747                         if ( is_string( $attribs['class'] ) ) {
4748                                 $attribs['class'] .= ' ' . $class;
4749                         } elseif ( is_array( $attribs['class'] ) ) {
4750                                 $attribs['class'][] = $class;
4751                         }
4752                 } else {
4753                         $attribs['class'] = $class;
4754                 }
4755
4756                 $pageLang = $this->mTitle->getPageLanguage();
4757                 $attribs['lang'] = $pageLang->getHtmlCode();
4758                 $attribs['dir'] = $pageLang->getDir();
4759
4760                 return $attribs;
4761         }
4762
4763         /**
4764          * @param string $wikitext
4765          * @return string
4766          * @since 1.29
4767          */
4768         protected function addNewLineAtEnd( $wikitext ) {
4769                 if ( strval( $wikitext ) !== '' ) {
4770                         // Ensure there's a newline at the end, otherwise adding lines
4771                         // is awkward.
4772                         // But don't add a newline if the text is empty, or Firefox in XHTML
4773                         // mode will show an extra newline. A bit annoying.
4774                         $wikitext .= "\n";
4775                         return $wikitext;
4776                 }
4777                 return $wikitext;
4778         }
4779
4780         /**
4781          * Turns section name wikitext into anchors for use in HTTP redirects. Various
4782          * versions of Microsoft browsers misinterpret fragment encoding of Location: headers
4783          * resulting in mojibake in address bar. Redirect them to legacy section IDs,
4784          * if possible. All the other browsers get HTML5 if the wiki is configured for it, to
4785          * spread the new style links more efficiently.
4786          *
4787          * @param string $text
4788          * @return string
4789          */
4790         private function guessSectionName( $text ) {
4791                 global $wgParser;
4792
4793                 // Detect Microsoft browsers
4794                 $userAgent = $this->context->getRequest()->getHeader( 'User-Agent' );
4795                 if ( $userAgent && preg_match( '/MSIE|Edge/', $userAgent ) ) {
4796                         // ...and redirect them to legacy encoding, if available
4797                         return $wgParser->guessLegacySectionNameFromWikiText( $text );
4798                 }
4799                 // Meanwhile, real browsers get real anchors
4800                 return $wgParser->guessSectionNameFromWikiText( $text );
4801         }
4802 }