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 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 integer */
 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 null|string */
 367         public $contentModel = null;
 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          * Returns if the given content model is editable.
 481          *
 482          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 483          * @return bool
 484          * @throws MWException If $modelId has no known handler
 485          */
 486         public function isSupportedContentModel( $modelId ) {
 487                 return $this->enableApiEditOverride === true ||
 488                         ContentHandler::getForModelID( $modelId )->supportsDirectEditing();
 489         }
 490
 491         /**
 492          * Allow editing of content that supports API direct editing, but not general
 493          * direct editing. Set to false by default.
 494          *
 495          * @param bool $enableOverride
 496          */
 497         public function setApiEditOverride( $enableOverride ) {
 498                 $this->enableApiEditOverride = $enableOverride;
 499         }
 500
 501         function submit() {
 502                 $this->edit();
 503         }
 504
 505         /**
 506          * This is the function that gets called for "action=edit". It
 507          * sets up various member variables, then passes execution to
 508          * another function, usually showEditForm()
 509          *
 510          * The edit form is self-submitting, so that when things like
 511          * preview and edit conflicts occur, we get the same form back
 512          * with the extra stuff added.  Only when the final submission
 513          * is made and all is well do we actually save and redirect to
 514          * the newly-edited page.
 515          */
 516         function edit() {
 517                 global $wgOut, $wgRequest, $wgUser;
 518                 // Allow extensions to modify/prevent this form or submission
 519                 if ( !Hooks::run( 'AlternateEdit', [ $this ] ) ) {
 520                         return;
 521                 }
 522
 523                 wfDebug( __METHOD__ . ": enter\n" );
 524
 525                 // If they used redlink=1 and the page exists, redirect to the main article
 526                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 527                         $wgOut->redirect( $this->mTitle->getFullURL() );
 528                         return;
 529                 }
 530
 531                 $this->importFormData( $wgRequest );
 532                 $this->firsttime = false;
 533
 534                 if ( wfReadOnly() && $this->save ) {
 535                         // Force preview
 536                         $this->save = false;
 537                         $this->preview = true;
 538                 }
 539
 540                 if ( $this->save ) {
 541                         $this->formtype = 'save';
 542                 } elseif ( $this->preview ) {
 543                         $this->formtype = 'preview';
 544                 } elseif ( $this->diff ) {
 545                         $this->formtype = 'diff';
 546                 } else { # First time through
 547                         $this->firsttime = true;
 548                         if ( $this->previewOnOpen() ) {
 549                                 $this->formtype = 'preview';
 550                         } else {
 551                                 $this->formtype = 'initial';
 552                         }
 553                 }
 554
 555                 $permErrors = $this->getEditPermissionErrors( $this->save ? 'secure' : 'full' );
 556                 if ( $permErrors ) {
 557                         wfDebug( __METHOD__ . ": User can't edit\n" );
 558                         // Auto-block user's IP if the account was "hard" blocked
 559                         if ( !wfReadOnly() ) {
 560                                 $user = $wgUser;
 561                                 DeferredUpdates::addCallableUpdate( function () use ( $user ) {
 562                                         $user->spreadAnyEditBlock();
 563                                 } );
 564                         }
 565                         $this->displayPermissionsError( $permErrors );
 566
 567                         return;
 568                 }
 569
 570                 $revision = $this->mArticle->getRevisionFetched();
 571                 // Disallow editing revisions with content models different from the current one
 572                 // Undo edits being an exception in order to allow reverting content model changes.
 573                 if ( $revision
 574                         && $revision->getContentModel() !== $this->contentModel
 575                 ) {
 576                         $prevRev = null;
 577                         if ( $this->undidRev ) {
 578                                 $undidRevObj = Revision::newFromId( $this->undidRev );
 579                                 $prevRev = $undidRevObj ? $undidRevObj->getPrevious() : null;
 580                         }
 581                         if ( !$this->undidRev
 582                                 || !$prevRev
 583                                 || $prevRev->getContentModel() !== $this->contentModel
 584                         ) {
 585                                 $this->displayViewSourcePage(
 586                                         $this->getContentObject(),
 587                                         $this->context->msg(
 588                                                 'contentmodelediterror',
 589                                                 $revision->getContentModel(),
 590                                                 $this->contentModel
 591                                         )->plain()
 592                                 );
 593                                 return;
 594                         }
 595                 }
 596
 597                 $this->isConflict = false;
 598                 // css / js subpages of user pages get a special treatment
 599                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 600                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 601                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 602                 // @todo FIXME: Silly assignment.
 603                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 604
 605                 # Show applicable editing introductions
 606                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 607                         $this->showIntro();
 608                 }
 609
 610                 # Attempt submission here.  This will check for edit conflicts,
 611                 # and redundantly check for locked database, blocked IPs, etc.
 612                 # that edit() already checked just in case someone tries to sneak
 613                 # in the back door with a hand-edited submission URL.
 614
 615                 if ( 'save' == $this->formtype ) {
 616                         $resultDetails = null;
 617                         $status = $this->attemptSave( $resultDetails );
 618                         if ( !$this->handleStatus( $status, $resultDetails ) ) {
 619                                 return;
 620                         }
 621                 }
 622
 623                 # First time through: get contents, set time for conflict
 624                 # checking, etc.
 625                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 626                         if ( $this->initialiseForm() === false ) {
 627                                 $this->noSuchSectionPage();
 628                                 return;
 629                         }
 630
 631                         if ( !$this->mTitle->getArticleID() ) {
 632                                 Hooks::run( 'EditFormPreloadText', [ &$this->textbox1, &$this->mTitle ] );
 633                         } else {
 634                                 Hooks::run( 'EditFormInitialText', [ $this ] );
 635                         }
 636
 637                 }
 638
 639                 $this->showEditForm();
 640         }
 641
 642         /**
 643          * @param string $rigor Same format as Title::getUserPermissionErrors()
 644          * @return array
 645          */
 646         protected function getEditPermissionErrors( $rigor = 'secure' ) {
 647                 global $wgUser;
 648
 649                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser, $rigor );
 650                 # Can this title be created?
 651                 if ( !$this->mTitle->exists() ) {
 652                         $permErrors = array_merge(
 653                                 $permErrors,
 654                                 wfArrayDiff2(
 655                                         $this->mTitle->getUserPermissionsErrors( 'create', $wgUser, $rigor ),
 656                                         $permErrors
 657                                 )
 658                         );
 659                 }
 660                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 661                 $remove = [];
 662                 foreach ( $permErrors as $error ) {
 663                         if ( ( $this->preview || $this->diff )
 664                                 && ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' )
 665                         ) {
 666                                 $remove[] = $error;
 667                         }
 668                 }
 669                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 670
 671                 return $permErrors;
 672         }
 673
 674         /**
 675          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 676          * but with the following differences:
 677          * - If redlink=1, the user will be redirected to the page
 678          * - If there is content to display or the error occurs while either saving,
 679          *   previewing or showing the difference, it will be a
 680          *   "View source for ..." page displaying the source code after the error message.
 681          *
 682          * @since 1.19
 683          * @param array $permErrors Array of permissions errors, as returned by
 684          *    Title::getUserPermissionsErrors().
 685          * @throws PermissionsError
 686          */
 687         protected function displayPermissionsError( array $permErrors ) {
 688                 global $wgRequest, $wgOut;
 689
 690                 if ( $wgRequest->getBool( 'redlink' ) ) {
 691                         // The edit page was reached via a red link.
 692                         // Redirect to the article page and let them click the edit tab if
 693                         // they really want a permission error.
 694                         $wgOut->redirect( $this->mTitle->getFullURL() );
 695                         return;
 696                 }
 697
 698                 $content = $this->getContentObject();
 699
 700                 # Use the normal message if there's nothing to display
 701                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 702                         $action = $this->mTitle->exists() ? 'edit' :
 703                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 704                         throw new PermissionsError( $action, $permErrors );
 705                 }
 706
 707                 $this->displayViewSourcePage(
 708                         $content,
 709                         $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' )
 710                 );
 711         }
 712
 713         /**
 714          * Display a read-only View Source page
 715          * @param Content $content content object
 716          * @param string $errorMessage additional wikitext error message to display
 717          */
 718         protected function displayViewSourcePage( Content $content, $errorMessage = '' ) {
 719                 global $wgOut;
 720
 721                 Hooks::run( 'EditPage::showReadOnlyForm:initial', [ $this, &$wgOut ] );
 722
 723                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 724                 $wgOut->setPageTitle( $this->context->msg(
 725                         'viewsource-title',
 726                         $this->getContextTitle()->getPrefixedText()
 727                 ) );
 728                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 729                 $wgOut->addHTML( $this->editFormPageTop );
 730                 $wgOut->addHTML( $this->editFormTextTop );
 731
 732                 if ( $errorMessage !== '' ) {
 733                         $wgOut->addWikiText( $errorMessage );
 734                         $wgOut->addHTML( "<hr />\n" );
 735                 }
 736
 737                 # If the user made changes, preserve them when showing the markup
 738                 # (This happens when a user is blocked during edit, for instance)
 739                 if ( !$this->firsttime ) {
 740                         $text = $this->textbox1;
 741                         $wgOut->addWikiMsg( 'viewyourtext' );
 742                 } else {
 743                         try {
 744                                 $text = $this->toEditText( $content );
 745                         } catch ( MWException $e ) {
 746                                 # Serialize using the default format if the content model is not supported
 747                                 # (e.g. for an old revision with a different model)
 748                                 $text = $content->serialize();
 749                         }
 750                         $wgOut->addWikiMsg( 'viewsourcetext' );
 751                 }
 752
 753                 $wgOut->addHTML( $this->editFormTextBeforeContent );
 754                 $this->showTextbox( $text, 'wpTextbox1', [ 'readonly' ] );
 755                 $wgOut->addHTML( $this->editFormTextAfterContent );
 756
 757                 $wgOut->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
 758
 759                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 760
 761                 $wgOut->addHTML( $this->editFormTextBottom );
 762                 if ( $this->mTitle->exists() ) {
 763                         $wgOut->returnToMain( null, $this->mTitle );
 764                 }
 765         }
 766
 767         /**
 768          * Should we show a preview when the edit form is first shown?
 769          *
 770          * @return bool
 771          */
 772         protected function previewOnOpen() {
 773                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 774                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 775                         // Explicit override from request
 776                         return true;
 777                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 778                         // Explicit override from request
 779                         return false;
 780                 } elseif ( $this->section == 'new' ) {
 781                         // Nothing *to* preview for new sections
 782                         return false;
 783                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 784                         && $wgUser->getOption( 'previewonfirst' )
 785                 ) {
 786                         // Standard preference behavior
 787                         return true;
 788                 } elseif ( !$this->mTitle->exists()
 789                         && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 790                         && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
 791                 ) {
 792                         // Categories are special
 793                         return true;
 794                 } else {
 795                         return false;
 796                 }
 797         }
 798
 799         /**
 800          * Checks whether the user entered a skin name in uppercase,
 801          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 802          *
 803          * @return bool
 804          */
 805         protected function isWrongCaseCssJsPage() {
 806                 if ( $this->mTitle->isCssJsSubpage() ) {
 807                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 808                         $skins = array_merge(
 809                                 array_keys( Skin::getSkinNames() ),
 810                                 [ 'common' ]
 811                         );
 812                         return !in_array( $name, $skins )
 813                                 && in_array( strtolower( $name ), $skins );
 814                 } else {
 815                         return false;
 816                 }
 817         }
 818
 819         /**
 820          * Returns whether section editing is supported for the current page.
 821          * Subclasses may override this to replace the default behavior, which is
 822          * to check ContentHandler::supportsSections.
 823          *
 824          * @return bool True if this edit page supports sections, false otherwise.
 825          */
 826         protected function isSectionEditSupported() {
 827                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 828                 return $contentHandler->supportsSections();
 829         }
 830
 831         /**
 832          * This function collects the form data and uses it to populate various member variables.
 833          * @param WebRequest $request
 834          * @throws ErrorPageError
 835          */
 836         function importFormData( &$request ) {
 837                 global $wgContLang, $wgUser;
 838
 839                 # Section edit can come from either the form or a link
 840                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 841
 842                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 843                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 844                 }
 845
 846                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 847
 848                 if ( $request->wasPosted() ) {
 849                         # These fields need to be checked for encoding.
 850                         # Also remove trailing whitespace, but don't remove _initial_
 851                         # whitespace from the text boxes. This may be significant formatting.
 852                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 853                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 854                                 // Skip this if wpTextbox2 has input, it indicates that we came
 855                                 // from a conflict page with raw page text, not a custom form
 856                                 // modified by subclasses
 857                                 $textbox1 = $this->importContentFormData( $request );
 858                                 if ( $textbox1 !== null ) {
 859                                         $this->textbox1 = $textbox1;
 860                                 }
 861                         }
 862
 863                         # Truncate for whole multibyte characters
 864                         $this->summary = $wgContLang->truncate( $request->getText( 'wpSummary' ), 255 );
 865
 866                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 867                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 868                         # section titles.
 869                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 870
 871                         # Treat sectiontitle the same way as summary.
 872                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 873                         # currently doing double duty as both edit summary and section title. Right now this
 874                         # is just to allow API edits to work around this limitation, but this should be
 875                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 876                         $this->sectiontitle = $wgContLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 877                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 878
 879                         $this->edittime = $request->getVal( 'wpEdittime' );
 880                         $this->editRevId = $request->getIntOrNull( 'editRevId' );
 881                         $this->starttime = $request->getVal( 'wpStarttime' );
 882
 883                         $undidRev = $request->getInt( 'wpUndidRevision' );
 884                         if ( $undidRev ) {
 885                                 $this->undidRev = $undidRev;
 886                         }
 887
 888                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 889
 890                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 891                                 // wpTextbox1 field is missing, possibly due to being "too big"
 892                                 // according to some filter rules such as Suhosin's setting for
 893                                 // suhosin.request.max_value_length (d'oh)
 894                                 $this->incompleteForm = true;
 895                         } else {
 896                                 // If we receive the last parameter of the request, we can fairly
 897                                 // claim the POST request has not been truncated.
 898
 899                                 // TODO: softened the check for cutover.  Once we determine
 900                                 // that it is safe, we should complete the transition by
 901                                 // removing the "edittime" clause.
 902                                 $this->incompleteForm = ( !$request->getVal( 'wpUltimateParam' )
 903                                         && is_null( $this->edittime ) );
 904                         }
 905                         if ( $this->incompleteForm ) {
 906                                 # If the form is incomplete, force to preview.
 907                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 908                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 909                                 $this->preview = true;
 910                         } else {
 911                                 $this->preview = $request->getCheck( 'wpPreview' );
 912                                 $this->diff = $request->getCheck( 'wpDiff' );
 913
 914                                 // Remember whether a save was requested, so we can indicate
 915                                 // if we forced preview due to session failure.
 916                                 $this->mTriedSave = !$this->preview;
 917
 918                                 if ( $this->tokenOk( $request ) ) {
 919                                         # Some browsers will not report any submit button
 920                                         # if the user hits enter in the comment box.
 921                                         # The unmarked state will be assumed to be a save,
 922                                         # if the form seems otherwise complete.
 923                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 924                                 } elseif ( $this->diff ) {
 925                                         # Failed token check, but only requested "Show Changes".
 926                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 927                                 } else {
 928                                         # Page might be a hack attempt posted from
 929                                         # an external site. Preview instead of saving.
 930                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 931                                         $this->preview = true;
 932                                 }
 933                         }
 934                         $this->save = !$this->preview && !$this->diff;
 935                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 936                                 $this->edittime = null;
 937                         }
 938
 939                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 940                                 $this->starttime = null;
 941                         }
 942
 943                         $this->recreate = $request->getCheck( 'wpRecreate' );
 944
 945                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 946                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 947
 948                         # Don't force edit summaries when a user is editing their own user or talk page
 949                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 950                                 && $this->mTitle->getText() == $wgUser->getName()
 951                         ) {
 952                                 $this->allowBlankSummary = true;
 953                         } else {
 954                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
 955                                         || !$wgUser->getOption( 'forceeditsummary' );
 956                         }
 957
 958                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 959
 960                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
 961                         $this->allowSelfRedirect = $request->getBool( 'wpIgnoreSelfRedirect' );
 962
 963                         $changeTags = $request->getVal( 'wpChangeTags' );
 964                         if ( is_null( $changeTags ) || $changeTags === '' ) {
 965                                 $this->changeTags = [];
 966                         } else {
 967                                 $this->changeTags = array_filter( array_map( 'trim', explode( ',',
 968                                         $changeTags ) ) );
 969                         }
 970                 } else {
 971                         # Not a posted form? Start with nothing.
 972                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 973                         $this->textbox1 = '';
 974                         $this->summary = '';
 975                         $this->sectiontitle = '';
 976                         $this->edittime = '';
 977                         $this->editRevId = null;
 978                         $this->starttime = wfTimestampNow();
 979                         $this->edit = false;
 980                         $this->preview = false;
 981                         $this->save = false;
 982                         $this->diff = false;
 983                         $this->minoredit = false;
 984                         // Watch may be overridden by request parameters
 985                         $this->watchthis = $request->getBool( 'watchthis', false );
 986                         $this->recreate = false;
 987
 988                         // When creating a new section, we can preload a section title by passing it as the
 989                         // preloadtitle parameter in the URL (Bug 13100)
 990                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 991                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 992                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 993                                 $this->summary = $request->getVal( 'preloadtitle' );
 994                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 995                                 $this->summary = $request->getText( 'summary' );
 996                                 if ( $this->summary !== '' ) {
 997                                         $this->hasPresetSummary = true;
 998                                 }
 999                         }
1000
1001                         if ( $request->getVal( 'minor' ) ) {
1002                                 $this->minoredit = true;
1003                         }
1004                 }
1005
1006                 $this->oldid = $request->getInt( 'oldid' );
1007                 $this->parentRevId = $request->getInt( 'parentRevId' );
1008
1009                 $this->bot = $request->getBool( 'bot', true );
1010                 $this->nosummary = $request->getBool( 'nosummary' );
1011
1012                 // May be overridden by revision.
1013                 $this->contentModel = $request->getText( 'model', $this->contentModel );
1014                 // May be overridden by revision.
1015                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
1016
1017                 try {
1018                         $handler = ContentHandler::getForModelID( $this->contentModel );
1019                 } catch ( MWUnknownContentModelException $e ) {
1020                         throw new ErrorPageError(
1021                                 'editpage-invalidcontentmodel-title',
1022                                 'editpage-invalidcontentmodel-text',
1023                                 [ $this->contentModel ]
1024                         );
1025                 }
1026
1027                 if ( !$handler->isSupportedFormat( $this->contentFormat ) ) {
1028                         throw new ErrorPageError(
1029                                 'editpage-notsupportedcontentformat-title',
1030                                 'editpage-notsupportedcontentformat-text',
1031                                 [ $this->contentFormat, ContentHandler::getLocalizedName( $this->contentModel ) ]
1032                         );
1033                 }
1034
1035                 /**
1036                  * @todo Check if the desired model is allowed in this namespace, and if
1037                  *   a transition from the page's current model to the new model is
1038                  *   allowed.
1039                  */
1040
1041                 $this->editintro = $request->getText( 'editintro',
1042                         // Custom edit intro for new sections
1043                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
1044
1045                 // Allow extensions to modify form data
1046                 Hooks::run( 'EditPage::importFormData', [ $this, $request ] );
1047
1048         }
1049
1050         /**
1051          * Subpage overridable method for extracting the page content data from the
1052          * posted form to be placed in $this->textbox1, if using customized input
1053          * this method should be overridden and return the page text that will be used
1054          * for saving, preview parsing and so on...
1055          *
1056          * @param WebRequest $request
1057          * @return string|null
1058          */
1059         protected function importContentFormData( &$request ) {
1060                 return; // Don't do anything, EditPage already extracted wpTextbox1
1061         }
1062
1063         /**
1064          * Initialise form fields in the object
1065          * Called on the first invocation, e.g. when a user clicks an edit link
1066          * @return bool If the requested section is valid
1067          */
1068         function initialiseForm() {
1069                 global $wgUser;
1070                 $this->edittime = $this->page->getTimestamp();
1071                 $this->editRevId = $this->page->getLatest();
1072
1073                 $content = $this->getContentObject( false ); # TODO: track content object?!
1074                 if ( $content === false ) {
1075                         return false;
1076                 }
1077                 $this->textbox1 = $this->toEditText( $content );
1078
1079                 // activate checkboxes if user wants them to be always active
1080                 # Sort out the "watch" checkbox
1081                 if ( $wgUser->getOption( 'watchdefault' ) ) {
1082                         # Watch all edits
1083                         $this->watchthis = true;
1084                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1085                         # Watch creations
1086                         $this->watchthis = true;
1087                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
1088                         # Already watched
1089                         $this->watchthis = true;
1090                 }
1091                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
1092                         $this->minoredit = true;
1093                 }
1094                 if ( $this->textbox1 === false ) {
1095                         return false;
1096                 }
1097                 return true;
1098         }
1099
1100         /**
1101          * @param Content|null $def_content The default value to return
1102          *
1103          * @return Content|null Content on success, $def_content for invalid sections
1104          *
1105          * @since 1.21
1106          */
1107         protected function getContentObject( $def_content = null ) {
1108                 global $wgOut, $wgRequest, $wgUser, $wgContLang;
1109
1110                 $content = false;
1111
1112                 // For message page not locally set, use the i18n message.
1113                 // For other non-existent articles, use preload text if any.
1114                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
1115                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
1116                                 # If this is a system message, get the default text.
1117                                 $msg = $this->mTitle->getDefaultMessageText();
1118
1119                                 $content = $this->toEditContent( $msg );
1120                         }
1121                         if ( $content === false ) {
1122                                 # If requested, preload some text.
1123                                 $preload = $wgRequest->getVal( 'preload',
1124                                         // Custom preload text for new sections
1125                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1126                                 $params = $wgRequest->getArray( 'preloadparams', [] );
1127
1128                                 $content = $this->getPreloadedContent( $preload, $params );
1129                         }
1130                 // For existing pages, get text based on "undo" or section parameters.
1131                 } else {
1132                         if ( $this->section != '' ) {
1133                                 // Get section edit text (returns $def_text for invalid sections)
1134                                 $orig = $this->getOriginalContent( $wgUser );
1135                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1136
1137                                 if ( !$content ) {
1138                                         $content = $def_content;
1139                                 }
1140                         } else {
1141                                 $undoafter = $wgRequest->getInt( 'undoafter' );
1142                                 $undo = $wgRequest->getInt( 'undo' );
1143
1144                                 if ( $undo > 0 && $undoafter > 0 ) {
1145                                         $undorev = Revision::newFromId( $undo );
1146                                         $oldrev = Revision::newFromId( $undoafter );
1147
1148                                         # Sanity check, make sure it's the right page,
1149                                         # the revisions exist and they were not deleted.
1150                                         # Otherwise, $content will be left as-is.
1151                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1152                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1153                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT )
1154                                         ) {
1155                                                 $content = $this->page->getUndoContent( $undorev, $oldrev );
1156
1157                                                 if ( $content === false ) {
1158                                                         # Warn the user that something went wrong
1159                                                         $undoMsg = 'failure';
1160                                                 } else {
1161                                                         $oldContent = $this->page->getContent( Revision::RAW );
1162                                                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
1163                                                         $newContent = $content->preSaveTransform( $this->mTitle, $wgUser, $popts );
1164                                                         if ( $newContent->getModel() !== $oldContent->getModel() ) {
1165                                                                 // The undo may change content
1166                                                                 // model if its reverting the top
1167                                                                 // edit. This can result in
1168                                                                 // mismatched content model/format.
1169                                                                 $this->contentModel = $newContent->getModel();
1170                                                                 $this->contentFormat = $oldrev->getContentFormat();
1171                                                         }
1172
1173                                                         if ( $newContent->equals( $oldContent ) ) {
1174                                                                 # Tell the user that the undo results in no change,
1175                                                                 # i.e. the revisions were already undone.
1176                                                                 $undoMsg = 'nochange';
1177                                                                 $content = false;
1178                                                         } else {
1179                                                                 # Inform the user of our success and set an automatic edit summary
1180                                                                 $undoMsg = 'success';
1181
1182                                                                 # If we just undid one rev, use an autosummary
1183                                                                 $firstrev = $oldrev->getNext();
1184                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1185                                                                         $userText = $undorev->getUserText();
1186                                                                         if ( $userText === '' ) {
1187                                                                                 $undoSummary = $this->context->msg(
1188                                                                                         'undo-summary-username-hidden',
1189                                                                                         $undo
1190                                                                                 )->inContentLanguage()->text();
1191                                                                         } else {
1192                                                                                 $undoSummary = $this->context->msg(
1193                                                                                         'undo-summary',
1194                                                                                         $undo,
1195                                                                                         $userText
1196                                                                                 )->inContentLanguage()->text();
1197                                                                         }
1198                                                                         if ( $this->summary === '' ) {
1199                                                                                 $this->summary = $undoSummary;
1200                                                                         } else {
1201                                                                                 $this->summary = $undoSummary . $this->context->msg( 'colon-separator' )
1202                                                                                         ->inContentLanguage()->text() . $this->summary;
1203                                                                         }
1204                                                                         $this->undidRev = $undo;
1205                                                                 }
1206                                                                 $this->formtype = 'diff';
1207                                                         }
1208                                                 }
1209                                         } else {
1210                                                 // Failed basic sanity checks.
1211                                                 // Older revisions may have been removed since the link
1212                                                 // was created, or we may simply have got bogus input.
1213                                                 $undoMsg = 'norev';
1214                                         }
1215
1216                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1217                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1218                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
1219                                                 $this->context->msg( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1220                                 }
1221
1222                                 if ( $content === false ) {
1223                                         $content = $this->getOriginalContent( $wgUser );
1224                                 }
1225                         }
1226                 }
1227
1228                 return $content;
1229         }
1230
1231         /**
1232          * Get the content of the wanted revision, without section extraction.
1233          *
1234          * The result of this function can be used to compare user's input with
1235          * section replaced in its context (using WikiPage::replaceSectionAtRev())
1236          * to the original text of the edit.
1237          *
1238          * This differs from Article::getContent() that when a missing revision is
1239          * encountered the result will be null and not the
1240          * 'missing-revision' message.
1241          *
1242          * @since 1.19
1243          * @param User $user The user to get the revision for
1244          * @return Content|null
1245          */
1246         private function getOriginalContent( User $user ) {
1247                 if ( $this->section == 'new' ) {
1248                         return $this->getCurrentContent();
1249                 }
1250                 $revision = $this->mArticle->getRevisionFetched();
1251                 if ( $revision === null ) {
1252                         if ( !$this->contentModel ) {
1253                                 $this->contentModel = $this->getTitle()->getContentModel();
1254                         }
1255                         $handler = ContentHandler::getForModelID( $this->contentModel );
1256
1257                         return $handler->makeEmptyContent();
1258                 }
1259                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1260                 return $content;
1261         }
1262
1263         /**
1264          * Get the edit's parent revision ID
1265          *
1266          * The "parent" revision is the ancestor that should be recorded in this
1267          * page's revision history.  It is either the revision ID of the in-memory
1268          * article content, or in the case of a 3-way merge in order to rebase
1269          * across a recoverable edit conflict, the ID of the newer revision to
1270          * which we have rebased this page.
1271          *
1272          * @since 1.27
1273          * @return int Revision ID
1274          */
1275         public function getParentRevId() {
1276                 if ( $this->parentRevId ) {
1277                         return $this->parentRevId;
1278                 } else {
1279                         return $this->mArticle->getRevIdFetched();
1280                 }
1281         }
1282
1283         /**
1284          * Get the current content of the page. This is basically similar to
1285          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1286          * content object is returned instead of null.
1287          *
1288          * @since 1.21
1289          * @return Content
1290          */
1291         protected function getCurrentContent() {
1292                 $rev = $this->page->getRevision();
1293                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1294
1295                 if ( $content === false || $content === null ) {
1296                         if ( !$this->contentModel ) {
1297                                 $this->contentModel = $this->getTitle()->getContentModel();
1298                         }
1299                         $handler = ContentHandler::getForModelID( $this->contentModel );
1300
1301                         return $handler->makeEmptyContent();
1302                 } elseif ( !$this->undidRev ) {
1303                         // Content models should always be the same since we error
1304                         // out if they are different before this point (in ->edit()).
1305                         // The exception being, during an undo, the current revision might
1306                         // differ from the prior revision.
1307                         $logger = LoggerFactory::getInstance( 'editpage' );
1308                         if ( $this->contentModel !== $rev->getContentModel() ) {
1309                                 $logger->warning( "Overriding content model from current edit {prev} to {new}", [
1310                                         'prev' => $this->contentModel,
1311                                         'new' => $rev->getContentModel(),
1312                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1313                                         'method' => __METHOD__
1314                                 ] );
1315                                 $this->contentModel = $rev->getContentModel();
1316                         }
1317
1318                         // Given that the content models should match, the current selected
1319                         // format should be supported.
1320                         if ( !$content->isSupportedFormat( $this->contentFormat ) ) {
1321                                 $logger->warning( "Current revision content format unsupported. Overriding {prev} to {new}", [
1322
1323                                         'prev' => $this->contentFormat,
1324                                         'new' => $rev->getContentFormat(),
1325                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1326                                         'method' => __METHOD__
1327                                 ] );
1328                                 $this->contentFormat = $rev->getContentFormat();
1329                         }
1330                 }
1331                 return $content;
1332         }
1333
1334         /**
1335          * Use this method before edit() to preload some content into the edit box
1336          *
1337          * @param Content $content
1338          *
1339          * @since 1.21
1340          */
1341         public function setPreloadedContent( Content $content ) {
1342                 $this->mPreloadContent = $content;
1343         }
1344
1345         /**
1346          * Get the contents to be preloaded into the box, either set by
1347          * an earlier setPreloadText() or by loading the given page.
1348          *
1349          * @param string $preload Representing the title to preload from.
1350          * @param array $params Parameters to use (interface-message style) in the preloaded text
1351          *
1352          * @return Content
1353          *
1354          * @since 1.21
1355          */
1356         protected function getPreloadedContent( $preload, $params = [] ) {
1357                 global $wgUser;
1358
1359                 if ( !empty( $this->mPreloadContent ) ) {
1360                         return $this->mPreloadContent;
1361                 }
1362
1363                 $handler = ContentHandler::getForModelID( $this->contentModel );
1364
1365                 if ( $preload === '' ) {
1366                         return $handler->makeEmptyContent();
1367                 }
1368
1369                 $title = Title::newFromText( $preload );
1370                 # Check for existence to avoid getting MediaWiki:Noarticletext
1371                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1372                         // TODO: somehow show a warning to the user!
1373                         return $handler->makeEmptyContent();
1374                 }
1375
1376                 $page = WikiPage::factory( $title );
1377                 if ( $page->isRedirect() ) {
1378                         $title = $page->getRedirectTarget();
1379                         # Same as before
1380                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1381                                 // TODO: somehow show a warning to the user!
1382                                 return $handler->makeEmptyContent();
1383                         }
1384                         $page = WikiPage::factory( $title );
1385                 }
1386
1387                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1388                 $content = $page->getContent( Revision::RAW );
1389
1390                 if ( !$content ) {
1391                         // TODO: somehow show a warning to the user!
1392                         return $handler->makeEmptyContent();
1393                 }
1394
1395                 if ( $content->getModel() !== $handler->getModelID() ) {
1396                         $converted = $content->convert( $handler->getModelID() );
1397
1398                         if ( !$converted ) {
1399                                 // TODO: somehow show a warning to the user!
1400                                 wfDebug( "Attempt to preload incompatible content: " .
1401                                         "can't convert " . $content->getModel() .
1402                                         " to " . $handler->getModelID() );
1403
1404                                 return $handler->makeEmptyContent();
1405                         }
1406
1407                         $content = $converted;
1408                 }
1409
1410                 return $content->preloadTransform( $title, $parserOptions, $params );
1411         }
1412
1413         /**
1414          * Make sure the form isn't faking a user's credentials.
1415          *
1416          * @param WebRequest $request
1417          * @return bool
1418          * @private
1419          */
1420         function tokenOk( &$request ) {
1421                 global $wgUser;
1422                 $token = $request->getVal( 'wpEditToken' );
1423                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1424                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1425                 return $this->mTokenOk;
1426         }
1427
1428         /**
1429          * Sets post-edit cookie indicating the user just saved a particular revision.
1430          *
1431          * This uses a temporary cookie for each revision ID so separate saves will never
1432          * interfere with each other.
1433          *
1434          * The cookie is deleted in the mediawiki.action.view.postEdit JS module after
1435          * the redirect.  It must be clearable by JavaScript code, so it must not be
1436          * marked HttpOnly. The JavaScript code converts the cookie to a wgPostEdit config
1437          * variable.
1438          *
1439          * If the variable were set on the server, it would be cached, which is unwanted
1440          * since the post-edit state should only apply to the load right after the save.
1441          *
1442          * @param int $statusValue The status value (to check for new article status)
1443          */
1444         protected function setPostEditCookie( $statusValue ) {
1445                 $revisionId = $this->page->getLatest();
1446                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1447
1448                 $val = 'saved';
1449                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1450                         $val = 'created';
1451                 } elseif ( $this->oldid ) {
1452                         $val = 'restored';
1453                 }
1454
1455                 $response = RequestContext::getMain()->getRequest()->response();
1456                 $response->setCookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION, [
1457                         'httpOnly' => false,
1458                 ] );
1459         }
1460
1461         /**
1462          * Attempt submission
1463          * @param array|bool $resultDetails See docs for $result in internalAttemptSave
1464          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1465          * @return Status The resulting status object.
1466          */
1467         public function attemptSave( &$resultDetails = false ) {
1468                 global $wgUser;
1469
1470                 # Allow bots to exempt some edits from bot flagging
1471                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1472                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1473
1474                 Hooks::run( 'EditPage::attemptSave:after', [ $this, $status, $resultDetails ] );
1475
1476                 return $status;
1477         }
1478
1479         /**
1480          * Handle status, such as after attempt save
1481          *
1482          * @param Status $status
1483          * @param array|bool $resultDetails
1484          *
1485          * @throws ErrorPageError
1486          * @return bool False, if output is done, true if rest of the form should be displayed
1487          */
1488         private function handleStatus( Status $status, $resultDetails ) {
1489                 global $wgUser, $wgOut;
1490
1491                 /**
1492                  * @todo FIXME: once the interface for internalAttemptSave() is made
1493                  *   nicer, this should use the message in $status
1494                  */
1495                 if ( $status->value == self::AS_SUCCESS_UPDATE
1496                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1497                 ) {
1498                         $this->didSave = true;
1499                         if ( !$resultDetails['nullEdit'] ) {
1500                                 $this->setPostEditCookie( $status->value );
1501                         }
1502                 }
1503
1504                 // "wpExtraQueryRedirect" is a hidden input to modify
1505                 // after save URL and is not used by actual edit form
1506                 $request = RequestContext::getMain()->getRequest();
1507                 $extraQueryRedirect = $request->getVal( 'wpExtraQueryRedirect' );
1508
1509                 switch ( $status->value ) {
1510                         case self::AS_HOOK_ERROR_EXPECTED:
1511                         case self::AS_CONTENT_TOO_BIG:
1512                         case self::AS_ARTICLE_WAS_DELETED:
1513                         case self::AS_CONFLICT_DETECTED:
1514                         case self::AS_SUMMARY_NEEDED:
1515                         case self::AS_TEXTBOX_EMPTY:
1516                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1517                         case self::AS_END:
1518                         case self::AS_BLANK_ARTICLE:
1519                         case self::AS_SELF_REDIRECT:
1520                                 return true;
1521
1522                         case self::AS_HOOK_ERROR:
1523                                 return false;
1524
1525                         case self::AS_CANNOT_USE_CUSTOM_MODEL:
1526                         case self::AS_PARSE_ERROR:
1527                                 $wgOut->addWikiText( '<div class="error">' . "\n" . $status->getWikiText() . '</div>' );
1528                                 return true;
1529
1530                         case self::AS_SUCCESS_NEW_ARTICLE:
1531                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1532                                 if ( $extraQueryRedirect ) {
1533                                         if ( $query === '' ) {
1534                                                 $query = $extraQueryRedirect;
1535                                         } else {
1536                                                 $query = $query . '&' . $extraQueryRedirect;
1537                                         }
1538                                 }
1539                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1540                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1541                                 return false;
1542
1543                         case self::AS_SUCCESS_UPDATE:
1544                                 $extraQuery = '';
1545                                 $sectionanchor = $resultDetails['sectionanchor'];
1546
1547                                 // Give extensions a chance to modify URL query on update
1548                                 Hooks::run(
1549                                         'ArticleUpdateBeforeRedirect',
1550                                         [ $this->mArticle, &$sectionanchor, &$extraQuery ]
1551                                 );
1552
1553                                 if ( $resultDetails['redirect'] ) {
1554                                         if ( $extraQuery == '' ) {
1555                                                 $extraQuery = 'redirect=no';
1556                                         } else {
1557                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1558                                         }
1559                                 }
1560                                 if ( $extraQueryRedirect ) {
1561                                         if ( $extraQuery === '' ) {
1562                                                 $extraQuery = $extraQueryRedirect;
1563                                         } else {
1564                                                 $extraQuery = $extraQuery . '&' . $extraQueryRedirect;
1565                                         }
1566                                 }
1567
1568                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1569                                 return false;
1570
1571                         case self::AS_SPAM_ERROR:
1572                                 $this->spamPageWithContent( $resultDetails['spam'] );
1573                                 return false;
1574
1575                         case self::AS_BLOCKED_PAGE_FOR_USER:
1576                                 throw new UserBlockedError( $wgUser->getBlock() );
1577
1578                         case self::AS_IMAGE_REDIRECT_ANON:
1579                         case self::AS_IMAGE_REDIRECT_LOGGED:
1580                                 throw new PermissionsError( 'upload' );
1581
1582                         case self::AS_READ_ONLY_PAGE_ANON:
1583                         case self::AS_READ_ONLY_PAGE_LOGGED:
1584                                 throw new PermissionsError( 'edit' );
1585
1586                         case self::AS_READ_ONLY_PAGE:
1587                                 throw new ReadOnlyError;
1588
1589                         case self::AS_RATE_LIMITED:
1590                                 throw new ThrottledError();
1591
1592                         case self::AS_NO_CREATE_PERMISSION:
1593                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1594                                 throw new PermissionsError( $permission );
1595
1596                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1597                                 throw new PermissionsError( 'editcontentmodel' );
1598
1599                         default:
1600                                 // We don't recognize $status->value. The only way that can happen
1601                                 // is if an extension hook aborted from inside ArticleSave.
1602                                 // Render the status object into $this->hookError
1603                                 // FIXME this sucks, we should just use the Status object throughout
1604                                 $this->hookError = '<div class="error">' ."\n" . $status->getWikiText() .
1605                                         '</div>';
1606                                 return true;
1607                 }
1608         }
1609
1610         /**
1611          * Run hooks that can filter edits just before they get saved.
1612          *
1613          * @param Content $content The Content to filter.
1614          * @param Status $status For reporting the outcome to the caller
1615          * @param User $user The user performing the edit
1616          *
1617          * @return bool
1618          */
1619         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1620                 // Run old style post-section-merge edit filter
1621                 if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged',
1622                         [ $this, $content, &$this->hookError, $this->summary ],
1623                         '1.21'
1624                 ) ) {
1625                         # Error messages etc. could be handled within the hook...
1626                         $status->fatal( 'hookaborted' );
1627                         $status->value = self::AS_HOOK_ERROR;
1628                         return false;
1629                 } elseif ( $this->hookError != '' ) {
1630                         # ...or the hook could be expecting us to produce an error
1631                         $status->fatal( 'hookaborted' );
1632                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1633                         return false;
1634                 }
1635
1636                 // Run new style post-section-merge edit filter
1637                 if ( !Hooks::run( 'EditFilterMergedContent',
1638                                 [ $this->mArticle->getContext(), $content, $status, $this->summary,
1639                                 $user, $this->minoredit ] )
1640                 ) {
1641                         # Error messages etc. could be handled within the hook...
1642                         if ( $status->isGood() ) {
1643                                 $status->fatal( 'hookaborted' );
1644                                 // Not setting $this->hookError here is a hack to allow the hook
1645                                 // to cause a return to the edit page without $this->hookError
1646                                 // being set. This is used by ConfirmEdit to display a captcha
1647                                 // without any error message cruft.
1648                         } else {
1649                                 $this->hookError = $this->formatStatusErrors( $status );
1650                         }
1651                         // Use the existing $status->value if the hook set it
1652                         if ( !$status->value ) {
1653                                 $status->value = self::AS_HOOK_ERROR;
1654                         }
1655                         return false;
1656                 } elseif ( !$status->isOK() ) {
1657                         # ...or the hook could be expecting us to produce an error
1658                         // FIXME this sucks, we should just use the Status object throughout
1659                         $this->hookError = $this->formatStatusErrors( $status );
1660                         $status->fatal( 'hookaborted' );
1661                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1662                         return false;
1663                 }
1664
1665                 return true;
1666         }
1667
1668         /**
1669          * Wrap status errors in an errorbox for increased visiblity
1670          *
1671          * @param Status $status
1672          * @return string
1673          */
1674         private function formatStatusErrors( Status $status ) {
1675                 $errmsg = $status->getHTML(
1676                         'edit-error-short',
1677                         'edit-error-long',
1678                         $this->context->getLanguage()
1679                 );
1680                 return <<<ERROR
1681 <div class="errorbox">
1682 {$errmsg}
1683 </div>
1684 <br clear="all" />
1685 ERROR;
1686         }
1687
1688         /**
1689          * Return the summary to be used for a new section.
1690          *
1691          * @param string $sectionanchor Set to the section anchor text
1692          * @return string
1693          */
1694         private function newSectionSummary( &$sectionanchor = null ) {
1695                 global $wgParser;
1696
1697                 if ( $this->sectiontitle !== '' ) {
1698                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1699                         // If no edit summary was specified, create one automatically from the section
1700                         // title and have it link to the new section. Otherwise, respect the summary as
1701                         // passed.
1702                         if ( $this->summary === '' ) {
1703                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1704                                 return $this->context->msg( 'newsectionsummary' )
1705                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1706                         }
1707                 } elseif ( $this->summary !== '' ) {
1708                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1709                         # This is a new section, so create a link to the new section
1710                         # in the revision summary.
1711                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1712                         return $this->context->msg( 'newsectionsummary' )
1713                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1714                 }
1715                 return $this->summary;
1716         }
1717
1718         /**
1719          * Attempt submission (no UI)
1720          *
1721          * @param array $result Array to add statuses to, currently with the
1722          *   possible keys:
1723          *   - spam (string): Spam string from content if any spam is detected by
1724          *     matchSpamRegex.
1725          *   - sectionanchor (string): Section anchor for a section save.
1726          *   - nullEdit (boolean): Set if doEditContent is OK.  True if null edit,
1727          *     false otherwise.
1728          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1729          *     revision is a redirect.
1730          * @param bool $bot True if edit is being made under the bot right.
1731          *
1732          * @return Status Status object, possibly with a message, but always with
1733          *   one of the AS_* constants in $status->value,
1734          *
1735          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1736          *   various error display idiosyncrasies. There are also lots of cases
1737          *   where error metadata is set in the object and retrieved later instead
1738          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1739          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1740          * time.
1741          */
1742         function internalAttemptSave( &$result, $bot = false ) {
1743                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1744                 global $wgContentHandlerUseDB;
1745
1746                 $status = Status::newGood();
1747
1748                 if ( !Hooks::run( 'EditPage::attemptSave', [ $this ] ) ) {
1749                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1750                         $status->fatal( 'hookaborted' );
1751                         $status->value = self::AS_HOOK_ERROR;
1752                         return $status;
1753                 }
1754
1755                 $spam = $wgRequest->getText( 'wpAntispam' );
1756                 if ( $spam !== '' ) {
1757                         wfDebugLog(
1758                                 'SimpleAntiSpam',
1759                                 $wgUser->getName() .
1760                                 ' editing "' .
1761                                 $this->mTitle->getPrefixedText() .
1762                                 '" submitted bogus field "' .
1763                                 $spam .
1764                                 '"'
1765                         );
1766                         $status->fatal( 'spamprotectionmatch', false );
1767                         $status->value = self::AS_SPAM_ERROR;
1768                         return $status;
1769                 }
1770
1771                 try {
1772                         # Construct Content object
1773                         $textbox_content = $this->toEditContent( $this->textbox1 );
1774                 } catch ( MWContentSerializationException $ex ) {
1775                         $status->fatal(
1776                                 'content-failed-to-parse',
1777                                 $this->contentModel,
1778                                 $this->contentFormat,
1779                                 $ex->getMessage()
1780                         );
1781                         $status->value = self::AS_PARSE_ERROR;
1782                         return $status;
1783                 }
1784
1785                 # Check image redirect
1786                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1787                         $textbox_content->isRedirect() &&
1788                         !$wgUser->isAllowed( 'upload' )
1789                 ) {
1790                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1791                                 $status->setResult( false, $code );
1792
1793                                 return $status;
1794                 }
1795
1796                 # Check for spam
1797                 $match = self::matchSummarySpamRegex( $this->summary );
1798                 if ( $match === false && $this->section == 'new' ) {
1799                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1800                         # regular summaries, it is added to the actual wikitext.
1801                         if ( $this->sectiontitle !== '' ) {
1802                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1803                                 $match = self::matchSpamRegex( $this->sectiontitle );
1804                         } else {
1805                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1806                                 # is used with the 'summary' parameter.
1807                                 $match = self::matchSpamRegex( $this->summary );
1808                         }
1809                 }
1810                 if ( $match === false ) {
1811                         $match = self::matchSpamRegex( $this->textbox1 );
1812                 }
1813                 if ( $match !== false ) {
1814                         $result['spam'] = $match;
1815                         $ip = $wgRequest->getIP();
1816                         $pdbk = $this->mTitle->getPrefixedDBkey();
1817                         $match = str_replace( "\n", '', $match );
1818                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1819                         $status->fatal( 'spamprotectionmatch', $match );
1820                         $status->value = self::AS_SPAM_ERROR;
1821                         return $status;
1822                 }
1823                 if ( !Hooks::run(
1824                         'EditFilter',
1825                         [ $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ] )
1826                 ) {
1827                         # Error messages etc. could be handled within the hook...
1828                         $status->fatal( 'hookaborted' );
1829                         $status->value = self::AS_HOOK_ERROR;
1830                         return $status;
1831                 } elseif ( $this->hookError != '' ) {
1832                         # ...or the hook could be expecting us to produce an error
1833                         $status->fatal( 'hookaborted' );
1834                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1835                         return $status;
1836                 }
1837
1838                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1839                         // Auto-block user's IP if the account was "hard" blocked
1840                         if ( !wfReadOnly() ) {
1841                                 $wgUser->spreadAnyEditBlock();
1842                         }
1843                         # Check block state against master, thus 'false'.
1844                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1845                         return $status;
1846                 }
1847
1848                 $this->contentLength = strlen( $this->textbox1 );
1849                 if ( $this->contentLength > $wgMaxArticleSize * 1024 ) {
1850                         // Error will be displayed by showEditForm()
1851                         $this->tooBig = true;
1852                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1853                         return $status;
1854                 }
1855
1856                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1857                         if ( $wgUser->isAnon() ) {
1858                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1859                                 return $status;
1860                         } else {
1861                                 $status->fatal( 'readonlytext' );
1862                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1863                                 return $status;
1864                         }
1865                 }
1866
1867                 $changingContentModel = false;
1868                 if ( $this->contentModel !== $this->mTitle->getContentModel() ) {
1869                         if ( !$wgContentHandlerUseDB ) {
1870                                 $status->fatal( 'editpage-cannot-use-custom-model' );
1871                                 $status->value = self::AS_CANNOT_USE_CUSTOM_MODEL;
1872                                 return $status;
1873                         } elseif ( !$wgUser->isAllowed( 'editcontentmodel' ) ) {
1874                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1875                                 return $status;
1876                         }
1877                         // Make sure the user can edit the page under the new content model too
1878                         $titleWithNewContentModel = clone $this->mTitle;
1879                         $titleWithNewContentModel->setContentModel( $this->contentModel );
1880                         if ( !$titleWithNewContentModel->userCan( 'editcontentmodel', $wgUser )
1881                                 || !$titleWithNewContentModel->userCan( 'edit', $wgUser )
1882                         ) {
1883                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1884                                 return $status;
1885                         }
1886
1887                         $changingContentModel = true;
1888                         $oldContentModel = $this->mTitle->getContentModel();
1889                 }
1890
1891                 if ( $this->changeTags ) {
1892                         $changeTagsStatus = ChangeTags::canAddTagsAccompanyingChange(
1893                                 $this->changeTags, $wgUser );
1894                         if ( !$changeTagsStatus->isOK() ) {
1895                                 $changeTagsStatus->value = self::AS_CHANGE_TAG_ERROR;
1896                                 return $changeTagsStatus;
1897                         }
1898                 }
1899
1900                 if ( wfReadOnly() ) {
1901                         $status->fatal( 'readonlytext' );
1902                         $status->value = self::AS_READ_ONLY_PAGE;
1903                         return $status;
1904                 }
1905                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 )
1906                         || ( $changingContentModel && $wgUser->pingLimiter( 'editcontentmodel' ) )
1907                 ) {
1908                         $status->fatal( 'actionthrottledtext' );
1909                         $status->value = self::AS_RATE_LIMITED;
1910                         return $status;
1911                 }
1912
1913                 # If the article has been deleted while editing, don't save it without
1914                 # confirmation
1915                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1916                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1917                         return $status;
1918                 }
1919
1920                 # Load the page data from the master. If anything changes in the meantime,
1921                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1922                 $this->page->loadPageData( 'fromdbmaster' );
1923                 $new = !$this->page->exists();
1924
1925                 if ( $new ) {
1926                         // Late check for create permission, just in case *PARANOIA*
1927                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1928                                 $status->fatal( 'nocreatetext' );
1929                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1930                                 wfDebug( __METHOD__ . ": no create permission\n" );
1931                                 return $status;
1932                         }
1933
1934                         // Don't save a new page if it's blank or if it's a MediaWiki:
1935                         // message with content equivalent to default (allow empty pages
1936                         // in this case to disable messages, see bug 50124)
1937                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1938                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1939                                 $defaultText = $defaultMessageText;
1940                         } else {
1941                                 $defaultText = '';
1942                         }
1943
1944                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
1945                                 $this->blankArticle = true;
1946                                 $status->fatal( 'blankarticle' );
1947                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1948                                 return $status;
1949                         }
1950
1951                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1952                                 return $status;
1953                         }
1954
1955                         $content = $textbox_content;
1956
1957                         $result['sectionanchor'] = '';
1958                         if ( $this->section == 'new' ) {
1959                                 if ( $this->sectiontitle !== '' ) {
1960                                         // Insert the section title above the content.
1961                                         $content = $content->addSectionHeader( $this->sectiontitle );
1962                                 } elseif ( $this->summary !== '' ) {
1963                                         // Insert the section title above the content.
1964                                         $content = $content->addSectionHeader( $this->summary );
1965                                 }
1966                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
1967                         }
1968
1969                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1970
1971                 } else { # not $new
1972
1973                         # Article exists. Check for edit conflict.
1974
1975                         $this->page->clear(); # Force reload of dates, etc.
1976                         $timestamp = $this->page->getTimestamp();
1977                         $latest = $this->page->getLatest();
1978
1979                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1980
1981                         // Check editRevId if set, which handles same-second timestamp collisions
1982                         if ( $timestamp != $this->edittime
1983                                 || ( $this->editRevId !== null && $this->editRevId != $latest )
1984                         ) {
1985                                 $this->isConflict = true;
1986                                 if ( $this->section == 'new' ) {
1987                                         if ( $this->page->getUserText() == $wgUser->getName() &&
1988                                                 $this->page->getComment() == $this->newSectionSummary()
1989                                         ) {
1990                                                 // Probably a duplicate submission of a new comment.
1991                                                 // This can happen when CDN resends a request after
1992                                                 // a timeout but the first one actually went through.
1993                                                 wfDebug( __METHOD__
1994                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
1995                                         } else {
1996                                                 // New comment; suppress conflict.
1997                                                 $this->isConflict = false;
1998                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1999                                         }
2000                                 } elseif ( $this->section == ''
2001                                         && Revision::userWasLastToEdit(
2002                                                 DB_MASTER, $this->mTitle->getArticleID(),
2003                                                 $wgUser->getId(), $this->edittime
2004                                         )
2005                                 ) {
2006                                         # Suppress edit conflict with self, except for section edits where merging is required.
2007                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
2008                                         $this->isConflict = false;
2009                                 }
2010                         }
2011
2012                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
2013                         if ( $this->sectiontitle !== '' ) {
2014                                 $sectionTitle = $this->sectiontitle;
2015                         } else {
2016                                 $sectionTitle = $this->summary;
2017                         }
2018
2019                         $content = null;
2020
2021                         if ( $this->isConflict ) {
2022                                 wfDebug( __METHOD__
2023                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
2024                                         . " (id '{$this->editRevId}') (article time '{$timestamp}')\n" );
2025                                 // @TODO: replaceSectionAtRev() with base ID (not prior current) for ?oldid=X case
2026                                 // ...or disable section editing for non-current revisions (not exposed anyway).
2027                                 if ( $this->editRevId !== null ) {
2028                                         $content = $this->page->replaceSectionAtRev(
2029                                                 $this->section,
2030                                                 $textbox_content,
2031                                                 $sectionTitle,
2032                                                 $this->editRevId
2033                                         );
2034                                 } else {
2035                                         $content = $this->page->replaceSectionContent(
2036                                                 $this->section,
2037                                                 $textbox_content,
2038                                                 $sectionTitle,
2039                                                 $this->edittime
2040                                         );
2041                                 }
2042                         } else {
2043                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
2044                                 $content = $this->page->replaceSectionContent(
2045                                         $this->section,
2046                                         $textbox_content,
2047                                         $sectionTitle
2048                                 );
2049                         }
2050
2051                         if ( is_null( $content ) ) {
2052                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
2053                                 $this->isConflict = true;
2054                                 $content = $textbox_content; // do not try to merge here!
2055                         } elseif ( $this->isConflict ) {
2056                                 # Attempt merge
2057                                 if ( $this->mergeChangesIntoContent( $content ) ) {
2058                                         // Successful merge! Maybe we should tell the user the good news?
2059                                         $this->isConflict = false;
2060                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
2061                                 } else {
2062                                         $this->section = '';
2063                                         $this->textbox1 = ContentHandler::getContentText( $content );
2064                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
2065                                 }
2066                         }
2067
2068                         if ( $this->isConflict ) {
2069                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
2070                                 return $status;
2071                         }
2072
2073                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
2074                                 return $status;
2075                         }
2076
2077                         if ( $this->section == 'new' ) {
2078                                 // Handle the user preference to force summaries here
2079                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
2080                                         $this->missingSummary = true;
2081                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
2082                                         $status->value = self::AS_SUMMARY_NEEDED;
2083                                         return $status;
2084                                 }
2085
2086                                 // Do not allow the user to post an empty comment
2087                                 if ( $this->textbox1 == '' ) {
2088                                         $this->missingComment = true;
2089                                         $status->fatal( 'missingcommenttext' );
2090                                         $status->value = self::AS_TEXTBOX_EMPTY;
2091                                         return $status;
2092                                 }
2093                         } elseif ( !$this->allowBlankSummary
2094                                 && !$content->equals( $this->getOriginalContent( $wgUser ) )
2095                                 && !$content->isRedirect()
2096                                 && md5( $this->summary ) == $this->autoSumm
2097                         ) {
2098                                 $this->missingSummary = true;
2099                                 $status->fatal( 'missingsummary' );
2100                                 $status->value = self::AS_SUMMARY_NEEDED;
2101                                 return $status;
2102                         }
2103
2104                         # All's well
2105                         $sectionanchor = '';
2106                         if ( $this->section == 'new' ) {
2107                                 $this->summary = $this->newSectionSummary( $sectionanchor );
2108                         } elseif ( $this->section != '' ) {
2109                                 # Try to get a section anchor from the section source, redirect
2110                                 # to edited section if header found.
2111                                 # XXX: Might be better to integrate this into Article::replaceSectionAtRev
2112                                 # for duplicate heading checking and maybe parsing.
2113                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
2114                                 # We can't deal with anchors, includes, html etc in the header for now,
2115                                 # headline would need to be parsed to improve this.
2116                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
2117                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
2118                                 }
2119                         }
2120                         $result['sectionanchor'] = $sectionanchor;
2121
2122                         // Save errors may fall down to the edit form, but we've now
2123                         // merged the section into full text. Clear the section field
2124                         // so that later submission of conflict forms won't try to
2125                         // replace that into a duplicated mess.
2126                         $this->textbox1 = $this->toEditText( $content );
2127                         $this->section = '';
2128
2129                         $status->value = self::AS_SUCCESS_UPDATE;
2130                 }
2131
2132                 if ( !$this->allowSelfRedirect
2133                         && $content->isRedirect()
2134                         && $content->getRedirectTarget()->equals( $this->getTitle() )
2135                 ) {
2136                         // If the page already redirects to itself, don't warn.
2137                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
2138                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
2139                                 $this->selfRedirect = true;
2140                                 $status->fatal( 'selfredirect' );
2141                                 $status->value = self::AS_SELF_REDIRECT;
2142                                 return $status;
2143                         }
2144                 }
2145
2146                 // Check for length errors again now that the section is merged in
2147                 $this->contentLength = strlen( $this->toEditText( $content ) );
2148                 if ( $this->contentLength > $wgMaxArticleSize * 1024 ) {
2149                         $this->tooBig = true;
2150                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
2151                         return $status;
2152                 }
2153
2154                 $flags = EDIT_AUTOSUMMARY |
2155                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
2156                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
2157                         ( $bot ? EDIT_FORCE_BOT : 0 );
2158
2159                 $doEditStatus = $this->page->doEditContent(
2160                         $content,
2161                         $this->summary,
2162                         $flags,
2163                         false,
2164                         $wgUser,
2165                         $content->getDefaultFormat(),
2166                         $this->changeTags
2167                 );
2168
2169                 if ( !$doEditStatus->isOK() ) {
2170                         // Failure from doEdit()
2171                         // Show the edit conflict page for certain recognized errors from doEdit(),
2172                         // but don't show it for errors from extension hooks
2173                         $errors = $doEditStatus->getErrorsArray();
2174                         if ( in_array( $errors[0][0],
2175                                         [ 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ] )
2176                         ) {
2177                                 $this->isConflict = true;
2178                                 // Destroys data doEdit() put in $status->value but who cares
2179                                 $doEditStatus->value = self::AS_END;
2180                         }
2181                         return $doEditStatus;
2182                 }
2183
2184                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
2185                 if ( $result['nullEdit'] ) {
2186                         // We don't know if it was a null edit until now, so increment here
2187                         $wgUser->pingLimiter( 'linkpurge' );
2188                 }
2189                 $result['redirect'] = $content->isRedirect();
2190
2191                 $this->updateWatchlist();
2192
2193                 // If the content model changed, add a log entry
2194                 if ( $changingContentModel ) {
2195                         $this->addContentModelChangeLogEntry(
2196                                 $wgUser,
2197                                 $new ? false : $oldContentModel,
2198                                 $this->contentModel,
2199                                 $this->summary
2200                         );
2201                 }
2202
2203                 return $status;
2204         }
2205
2206         /**
2207          * @param User $user
2208          * @param string|false $oldModel false if the page is being newly created
2209          * @param string $newModel
2210          * @param string $reason
2211          */
2212         protected function addContentModelChangeLogEntry( User $user, $oldModel, $newModel, $reason ) {
2213                 $new = $oldModel === false;
2214                 $log = new ManualLogEntry( 'contentmodel', $new ? 'new' : 'change' );
2215                 $log->setPerformer( $user );
2216                 $log->setTarget( $this->mTitle );
2217                 $log->setComment( $reason );
2218                 $log->setParameters( [
2219                         '4::oldmodel' => $oldModel,
2220                         '5::newmodel' => $newModel
2221                 ] );
2222                 $logid = $log->insert();
2223                 $log->publish( $logid );
2224         }
2225
2226         /**
2227          * Register the change of watch status
2228          */
2229         protected function updateWatchlist() {
2230                 global $wgUser;
2231
2232                 if ( !$wgUser->isLoggedIn() ) {
2233                         return;
2234                 }
2235
2236                 $user = $wgUser;
2237                 $title = $this->mTitle;
2238                 $watch = $this->watchthis;
2239                 // Do this in its own transaction to reduce contention...
2240                 DeferredUpdates::addCallableUpdate( function () use ( $user, $title, $watch ) {
2241                         if ( $watch == $user->isWatched( $title, User::IGNORE_USER_RIGHTS ) ) {
2242                                 return; // nothing to change
2243                         }
2244                         WatchAction::doWatchOrUnwatch( $watch, $title, $user );
2245                 } );
2246         }
2247
2248         /**
2249          * Attempts to do 3-way merge of edit content with a base revision
2250          * and current content, in case of edit conflict, in whichever way appropriate
2251          * for the content type.
2252          *
2253          * @since 1.21
2254          *
2255          * @param Content $editContent
2256          *
2257          * @return bool
2258          */
2259         private function mergeChangesIntoContent( &$editContent ) {
2260
2261                 $db = wfGetDB( DB_MASTER );
2262
2263                 // This is the revision the editor started from
2264                 $baseRevision = $this->getBaseRevision();
2265                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
2266
2267                 if ( is_null( $baseContent ) ) {
2268                         return false;
2269                 }
2270
2271                 // The current state, we want to merge updates into it
2272                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2273                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2274
2275                 if ( is_null( $currentContent ) ) {
2276                         return false;
2277                 }
2278
2279                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2280
2281                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2282
2283                 if ( $result ) {
2284                         $editContent = $result;
2285                         // Update parentRevId to what we just merged.
2286                         $this->parentRevId = $currentRevision->getId();
2287                         return true;
2288                 }
2289
2290                 return false;
2291         }
2292
2293         /**
2294          * @note: this method is very poorly named. If the user opened the form with ?oldid=X,
2295          *        one might think of X as the "base revision", which is NOT what this returns.
2296          * @return Revision Current version when the edit was started
2297          */
2298         function getBaseRevision() {
2299                 if ( !$this->mBaseRevision ) {
2300                         $db = wfGetDB( DB_MASTER );
2301                         $this->mBaseRevision = $this->editRevId
2302                                 ? Revision::newFromId( $this->editRevId, Revision::READ_LATEST )
2303                                 : Revision::loadFromTimestamp( $db, $this->mTitle, $this->edittime );
2304                 }
2305                 return $this->mBaseRevision;
2306         }
2307
2308         /**
2309          * Check given input text against $wgSpamRegex, and return the text of the first match.
2310          *
2311          * @param string $text
2312          *
2313          * @return string|bool Matching string or false
2314          */
2315         public static function matchSpamRegex( $text ) {
2316                 global $wgSpamRegex;
2317                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2318                 $regexes = (array)$wgSpamRegex;
2319                 return self::matchSpamRegexInternal( $text, $regexes );
2320         }
2321
2322         /**
2323          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2324          *
2325          * @param string $text
2326          *
2327          * @return string|bool Matching string or false
2328          */
2329         public static function matchSummarySpamRegex( $text ) {
2330                 global $wgSummarySpamRegex;
2331                 $regexes = (array)$wgSummarySpamRegex;
2332                 return self::matchSpamRegexInternal( $text, $regexes );
2333         }
2334
2335         /**
2336          * @param string $text
2337          * @param array $regexes
2338          * @return bool|string
2339          */
2340         protected static function matchSpamRegexInternal( $text, $regexes ) {
2341                 foreach ( $regexes as $regex ) {
2342                         $matches = [];
2343                         if ( preg_match( $regex, $text, $matches ) ) {
2344                                 return $matches[0];
2345                         }
2346                 }
2347                 return false;
2348         }
2349
2350         function setHeaders() {
2351                 global $wgOut, $wgUser, $wgAjaxEditStash;
2352
2353                 $wgOut->addModules( 'mediawiki.action.edit' );
2354                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
2355
2356                 if ( $wgUser->getOption( 'showtoolbar' ) ) {
2357                         // The addition of default buttons is handled by getEditToolbar() which
2358                         // has its own dependency on this module. The call here ensures the module
2359                         // is loaded in time (it has position "top") for other modules to register
2360                         // buttons (e.g. extensions, gadgets, user scripts).
2361                         $wgOut->addModules( 'mediawiki.toolbar' );
2362                 }
2363
2364                 if ( $wgUser->getOption( 'uselivepreview' ) ) {
2365                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
2366                 }
2367
2368                 if ( $wgUser->getOption( 'useeditwarning' ) ) {
2369                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
2370                 }
2371
2372                 # Enabled article-related sidebar, toplinks, etc.
2373                 $wgOut->setArticleRelated( true );
2374
2375                 $contextTitle = $this->getContextTitle();
2376                 if ( $this->isConflict ) {
2377                         $msg = 'editconflict';
2378                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2379                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2380                 } else {
2381                         $msg = $contextTitle->exists()
2382                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2383                                         && $contextTitle->getDefaultMessageText() !== false
2384                                 )
2385                                 ? 'editing'
2386                                 : 'creating';
2387                 }
2388
2389                 # Use the title defined by DISPLAYTITLE magic word when present
2390                 # NOTE: getDisplayTitle() returns HTML while getPrefixedText() returns plain text.
2391                 #       setPageTitle() treats the input as wikitext, which should be safe in either case.
2392                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2393                 if ( $displayTitle === false ) {
2394                         $displayTitle = $contextTitle->getPrefixedText();
2395                 }
2396                 $wgOut->setPageTitle( $this->context->msg( $msg, $displayTitle ) );
2397                 # Transmit the name of the message to JavaScript for live preview
2398                 # Keep Resources.php/mediawiki.action.edit.preview in sync with the possible keys
2399                 $wgOut->addJsConfigVars( [
2400                         'wgEditMessage' => $msg,
2401                         'wgAjaxEditStash' => $wgAjaxEditStash,
2402                 ] );
2403         }
2404
2405         /**
2406          * Show all applicable editing introductions
2407          */
2408         protected function showIntro() {
2409                 global $wgOut, $wgUser;
2410                 if ( $this->suppressIntro ) {
2411                         return;
2412                 }
2413
2414                 $namespace = $this->mTitle->getNamespace();
2415
2416                 if ( $namespace == NS_MEDIAWIKI ) {
2417                         # Show a warning if editing an interface message
2418                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2419                         # If this is a default message (but not css or js),
2420                         # show a hint that it is translatable on translatewiki.net
2421                         if ( !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2422                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2423                         ) {
2424                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2425                                 if ( $defaultMessageText !== false ) {
2426                                         $wgOut->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2427                                                 'translateinterface' );
2428                                 }
2429                         }
2430                 } elseif ( $namespace == NS_FILE ) {
2431                         # Show a hint to shared repo
2432                         $file = wfFindFile( $this->mTitle );
2433                         if ( $file && !$file->isLocal() ) {
2434                                 $descUrl = $file->getDescriptionUrl();
2435                                 # there must be a description url to show a hint to shared repo
2436                                 if ( $descUrl ) {
2437                                         if ( !$this->mTitle->exists() ) {
2438                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", [
2439                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2440                                                 ] );
2441                                         } else {
2442                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", [
2443                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2444                                                 ] );
2445                                         }
2446                                 }
2447                         }
2448                 }
2449
2450                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2451                 # Show log extract when the user is currently blocked
2452                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2453                         $username = explode( '/', $this->mTitle->getText(), 2 )[0];
2454                         $user = User::newFromName( $username, false /* allow IP users*/ );
2455                         $ip = User::isIP( $username );
2456                         $block = Block::newFromTarget( $user, $user );
2457                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2458                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2459                                         [ 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ] );
2460                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
2461                                 # Show log extract if the user is currently blocked
2462                                 LogEventsList::showLogExtract(
2463                                         $wgOut,
2464                                         'block',
2465                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2466                                         '',
2467                                         [
2468                                                 'lim' => 1,
2469                                                 'showIfEmpty' => false,
2470                                                 'msgKey' => [
2471                                                         'blocked-notice-logextract',
2472                                                         $user->getName() # Support GENDER in notice
2473                                                 ]
2474                                         ]
2475                                 );
2476                         }
2477                 }
2478                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2479                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2480                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2481                                 $this->context->msg( 'helppage' )->inContentLanguage()->text()
2482                         ) );
2483                         if ( $wgUser->isLoggedIn() ) {
2484                                 $wgOut->wrapWikiMsg(
2485                                         // Suppress the external link icon, consider the help url an internal one
2486                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2487                                         [
2488                                                 'newarticletext',
2489                                                 $helpLink
2490                                         ]
2491                                 );
2492                         } else {
2493                                 $wgOut->wrapWikiMsg(
2494                                         // Suppress the external link icon, consider the help url an internal one
2495                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2496                                         [
2497                                                 'newarticletextanon',
2498                                                 $helpLink
2499                                         ]
2500                                 );
2501                         }
2502                 }
2503                 # Give a notice if the user is editing a deleted/moved page...
2504                 if ( !$this->mTitle->exists() ) {
2505                         LogEventsList::showLogExtract( $wgOut, [ 'delete', 'move' ], $this->mTitle,
2506                                 '',
2507                                 [
2508                                         'lim' => 10,
2509                                         'conds' => [ "log_action != 'revision'" ],
2510                                         'showIfEmpty' => false,
2511                                         'msgKey' => [ 'recreate-moveddeleted-warn' ]
2512                                 ]
2513                         );
2514                 }
2515         }
2516
2517         /**
2518          * Attempt to show a custom editing introduction, if supplied
2519          *
2520          * @return bool
2521          */
2522         protected function showCustomIntro() {
2523                 if ( $this->editintro ) {
2524                         $title = Title::newFromText( $this->editintro );
2525                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2526                                 global $wgOut;
2527                                 // Added using template syntax, to take <noinclude>'s into account.
2528                                 $wgOut->addWikiTextTitleTidy(
2529                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2530                                         $this->mTitle
2531                                 );
2532                                 return true;
2533                         }
2534                 }
2535                 return false;
2536         }
2537
2538         /**
2539          * Gets an editable textual representation of $content.
2540          * The textual representation can be turned by into a Content object by the
2541          * toEditContent() method.
2542          *
2543          * If $content is null or false or a string, $content is returned unchanged.
2544          *
2545          * If the given Content object is not of a type that can be edited using
2546          * the text base EditPage, an exception will be raised. Set
2547          * $this->allowNonTextContent to true to allow editing of non-textual
2548          * content.
2549          *
2550          * @param Content|null|bool|string $content
2551          * @return string The editable text form of the content.
2552          *
2553          * @throws MWException If $content is not an instance of TextContent and
2554          *   $this->allowNonTextContent is not true.
2555          */
2556         protected function toEditText( $content ) {
2557                 if ( $content === null || $content === false || is_string( $content ) ) {
2558                         return $content;
2559                 }
2560
2561                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2562                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2563                 }
2564
2565                 return $content->serialize( $this->contentFormat );
2566         }
2567
2568         /**
2569          * Turns the given text into a Content object by unserializing it.
2570          *
2571          * If the resulting Content object is not of a type that can be edited using
2572          * the text base EditPage, an exception will be raised. Set
2573          * $this->allowNonTextContent to true to allow editing of non-textual
2574          * content.
2575          *
2576          * @param string|null|bool $text Text to unserialize
2577          * @return Content|bool|null The content object created from $text. If $text was false
2578          *   or null, false resp. null will be  returned instead.
2579          *
2580          * @throws MWException If unserializing the text results in a Content
2581          *   object that is not an instance of TextContent and
2582          *   $this->allowNonTextContent is not true.
2583          */
2584         protected function toEditContent( $text ) {
2585                 if ( $text === false || $text === null ) {
2586                         return $text;
2587                 }
2588
2589                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2590                         $this->contentModel, $this->contentFormat );
2591
2592                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2593                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2594                 }
2595
2596                 return $content;
2597         }
2598
2599         /**
2600          * Send the edit form and related headers to $wgOut
2601          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2602          *     during form output near the top, for captchas and the like.
2603          *
2604          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2605          * use the EditPage::showEditForm:fields hook instead.
2606          */
2607         function showEditForm( $formCallback = null ) {
2608                 global $wgOut, $wgUser;
2609
2610                 # need to parse the preview early so that we know which templates are used,
2611                 # otherwise users with "show preview after edit box" will get a blank list
2612                 # we parse this near the beginning so that setHeaders can do the title
2613                 # setting work instead of leaving it in getPreviewText
2614                 $previewOutput = '';
2615                 if ( $this->formtype == 'preview' ) {
2616                         $previewOutput = $this->getPreviewText();
2617                 }
2618
2619                 Hooks::run( 'EditPage::showEditForm:initial', [ &$this, &$wgOut ] );
2620
2621                 $this->setHeaders();
2622
2623                 $this->addTalkPageText();
2624                 $this->addEditNotices();
2625
2626                 if ( !$this->isConflict &&
2627                         $this->section != '' &&
2628                         !$this->isSectionEditSupported() ) {
2629                         // We use $this->section to much before this and getVal('wgSection') directly in other places
2630                         // at this point we can't reset $this->section to '' to fallback to non-section editing.
2631                         // Someone is welcome to try refactoring though
2632                         $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2633                         return;
2634                 }
2635
2636                 $this->showHeader();
2637
2638                 $wgOut->addHTML( $this->editFormPageTop );
2639
2640                 if ( $wgUser->getOption( 'previewontop' ) ) {
2641                         $this->displayPreviewArea( $previewOutput, true );
2642                 }
2643
2644                 $wgOut->addHTML( $this->editFormTextTop );
2645
2646                 $showToolbar = true;
2647                 if ( $this->wasDeletedSinceLastEdit() ) {
2648                         if ( $this->formtype == 'save' ) {
2649                                 // Hide the toolbar and edit area, user can click preview to get it back
2650                                 // Add an confirmation checkbox and explanation.
2651                                 $showToolbar = false;
2652                         } else {
2653                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2654                                         'deletedwhileediting' );
2655                         }
2656                 }
2657
2658                 // @todo add EditForm plugin interface and use it here!
2659                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2660                 $wgOut->addHTML( Html::openElement(
2661                         'form',
2662                         [
2663                                 'id' => self::EDITFORM_ID,
2664                                 'name' => self::EDITFORM_ID,
2665                                 'method' => 'post',
2666                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2667                                 'enctype' => 'multipart/form-data'
2668                         ]
2669                 ) );
2670
2671                 if ( is_callable( $formCallback ) ) {
2672                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2673                         call_user_func_array( $formCallback, [ &$wgOut ] );
2674                 }
2675
2676                 // Add an empty field to trip up spambots
2677                 $wgOut->addHTML(
2678                         Xml::openElement( 'div', [ 'id' => 'antispam-container', 'style' => 'display: none;' ] )
2679                         . Html::rawElement(
2680                                 'label',
2681                                 [ 'for' => 'wpAntispam' ],
2682                                 $this->context->msg( 'simpleantispam-label' )->parse()
2683                         )
2684                         . Xml::element(
2685                                 'input',
2686                                 [
2687                                         'type' => 'text',
2688                                         'name' => 'wpAntispam',
2689                                         'id' => 'wpAntispam',
2690                                         'value' => ''
2691                                 ]
2692                         )
2693                         . Xml::closeElement( 'div' )
2694                 );
2695
2696                 Hooks::run( 'EditPage::showEditForm:fields', [ &$this, &$wgOut ] );
2697
2698                 // Put these up at the top to ensure they aren't lost on early form submission
2699                 $this->showFormBeforeText();
2700
2701                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2702                         $username = $this->lastDelete->user_name;
2703                         $comment = $this->lastDelete->log_comment;
2704
2705                         // It is better to not parse the comment at all than to have templates expanded in the middle
2706                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2707                         $key = $comment === ''
2708                                 ? 'confirmrecreate-noreason'
2709                                 : 'confirmrecreate';
2710                         $wgOut->addHTML(
2711                                 '<div class="mw-confirm-recreate">' .
2712                                         $this->context->msg( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2713                                 Xml::checkLabel( $this->context->msg( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2714                                         [ 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' ]
2715                                 ) .
2716                                 '</div>'
2717                         );
2718                 }
2719
2720                 # When the summary is hidden, also hide them on preview/show changes
2721                 if ( $this->nosummary ) {
2722                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2723                 }
2724
2725                 # If a blank edit summary was previously provided, and the appropriate
2726                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2727                 # user being bounced back more than once in the event that a summary
2728                 # is not required.
2729                 # ####
2730                 # For a bit more sophisticated detection of blank summaries, hash the
2731                 # automatic one and pass that in the hidden field wpAutoSummary.
2732                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2733                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2734                 }
2735
2736                 if ( $this->undidRev ) {
2737                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2738                 }
2739
2740                 if ( $this->selfRedirect ) {
2741                         $wgOut->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2742                 }
2743
2744                 if ( $this->hasPresetSummary ) {
2745                         // If a summary has been preset using &summary= we don't want to prompt for
2746                         // a different summary. Only prompt for a summary if the summary is blanked.
2747                         // (Bug 17416)
2748                         $this->autoSumm = md5( '' );
2749                 }
2750
2751                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2752                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2753
2754                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2755                 $wgOut->addHTML( Html::hidden( 'parentRevId', $this->getParentRevId() ) );
2756
2757                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2758                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2759
2760                 if ( $this->section == 'new' ) {
2761                         $this->showSummaryInput( true, $this->summary );
2762                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2763                 }
2764
2765                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2766
2767                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2768                         $wgOut->addHTML( EditPage::getEditToolbar( $this->mTitle ) );
2769                 }
2770
2771                 if ( $this->blankArticle ) {
2772                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2773                 }
2774
2775                 if ( $this->isConflict ) {
2776                         // In an edit conflict bypass the overridable content form method
2777                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2778                         // resolved between page source edits and custom ui edits using the
2779                         // custom edit ui.
2780                         $this->textbox2 = $this->textbox1;
2781
2782                         $content = $this->getCurrentContent();
2783                         $this->textbox1 = $this->toEditText( $content );
2784
2785                         $this->showTextbox1();
2786                 } else {
2787                         $this->showContentForm();
2788                 }
2789
2790                 $wgOut->addHTML( $this->editFormTextAfterContent );
2791
2792                 $this->showStandardInputs();
2793
2794                 $this->showFormAfterText();
2795
2796                 $this->showTosSummary();
2797
2798                 $this->showEditTools();
2799
2800                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2801
2802                 $wgOut->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
2803
2804                 $wgOut->addHTML( Html::rawElement( 'div', [ 'class' => 'hiddencats' ],
2805                         Linker::formatHiddenCategories( $this->page->getHiddenCategories() ) ) );
2806
2807                 $wgOut->addHTML( Html::rawElement( 'div', [ 'class' => 'limitreport' ],
2808                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2809
2810                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2811
2812                 if ( $this->isConflict ) {
2813                         try {
2814                                 $this->showConflict();
2815                         } catch ( MWContentSerializationException $ex ) {
2816                                 // this can't really happen, but be nice if it does.
2817                                 $msg = $this->context->msg(
2818                                         'content-failed-to-parse',
2819                                         $this->contentModel,
2820                                         $this->contentFormat,
2821                                         $ex->getMessage()
2822                                 );
2823                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2824                         }
2825                 }
2826
2827                 // Set a hidden field so JS knows what edit form mode we are in
2828                 if ( $this->isConflict ) {
2829                         $mode = 'conflict';
2830                 } elseif ( $this->preview ) {
2831                         $mode = 'preview';
2832                 } elseif ( $this->diff ) {
2833                         $mode = 'diff';
2834                 } else {
2835                         $mode = 'text';
2836                 }
2837                 $wgOut->addHTML( Html::hidden( 'mode', $mode, [ 'id' => 'mw-edit-mode' ] ) );
2838
2839                 // Marker for detecting truncated form data.  This must be the last
2840                 // parameter sent in order to be of use, so do not move me.
2841                 $wgOut->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2842                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2843
2844                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2845                         $this->displayPreviewArea( $previewOutput, false );
2846                 }
2847
2848         }
2849
2850         /**
2851          * Wrapper around TemplatesOnThisPageFormatter to make
2852          * a "templates on this page" list.
2853          *
2854          * @param Title[] $templates
2855          * @return string HTML
2856          */
2857         protected function makeTemplatesOnThisPageList( array $templates ) {
2858                 $templateListFormatter = new TemplatesOnThisPageFormatter(
2859                         $this->context, MediaWikiServices::getInstance()->getLinkRenderer()
2860                 );
2861
2862                 // preview if preview, else section if section, else false
2863                 $type = false;
2864                 if ( $this->preview ) {
2865                         $type = 'preview';
2866                 } elseif ( $this->section != '' ) {
2867                         $type = 'section';
2868                 }
2869
2870                 return Html::rawElement( 'div', [ 'class' => 'templatesUsed' ],
2871                         $templateListFormatter->format( $templates, $type )
2872                 );
2873
2874         }
2875
2876         /**
2877          * Extract the section title from current section text, if any.
2878          *
2879          * @param string $text
2880          * @return string|bool String or false
2881          */
2882         public static function extractSectionTitle( $text ) {
2883                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2884                 if ( !empty( $matches[2] ) ) {
2885                         global $wgParser;
2886                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2887                 } else {
2888                         return false;
2889                 }
2890         }
2891
2892         protected function showHeader() {
2893                 global $wgAllowUserCss, $wgAllowUserJs;
2894
2895                 if ( $this->isConflict ) {
2896                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2897                         $this->editRevId = $this->page->getLatest();
2898                 } else {
2899                         if ( $this->section != '' && $this->section != 'new' ) {
2900                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2901                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); // FIXME: use Content object
2902                                         if ( $sectionTitle !== false ) {
2903                                                 $this->summary = "/* $sectionTitle */ ";
2904                                         }
2905                                 }
2906                         }
2907
2908                         if ( $this->missingComment ) {
2909                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2910                         }
2911
2912                         if ( $this->missingSummary && $this->section != 'new' ) {
2913                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2914                         }
2915
2916                         if ( $this->missingSummary && $this->section == 'new' ) {
2917                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2918                         }
2919
2920                         if ( $this->blankArticle ) {
2921                                 $wgOut->wrapWikiMsg( "<div id='mw-blankarticle'>\n$1\n</div>", 'blankarticle' );
2922                         }
2923
2924                         if ( $this->selfRedirect ) {
2925                                 $wgOut->wrapWikiMsg( "<div id='mw-selfredirect'>\n$1\n</div>", 'selfredirect' );
2926                         }
2927
2928                         if ( $this->hookError !== '' ) {
2929                                 $wgOut->addWikiText( $this->hookError );
2930                         }
2931
2932                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2933                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2934                         }
2935
2936                         if ( $this->section != 'new' ) {
2937                                 $revision = $this->mArticle->getRevisionFetched();
2938                                 if ( $revision ) {
2939                                         // Let sysop know that this will make private content public if saved
2940
2941                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2942                                                 $wgOut->wrapWikiMsg(
2943                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2944                                                         'rev-deleted-text-permission'
2945                                                 );
2946                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2947                                                 $wgOut->wrapWikiMsg(
2948                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2949                                                         'rev-deleted-text-view'
2950                                                 );
2951                                         }
2952
2953                                         if ( !$revision->isCurrent() ) {
2954                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2955                                                 $wgOut->addWikiMsg( 'editingold' );
2956                                                 $this->isOldRev = true;
2957                                         }
2958                                 } elseif ( $this->mTitle->exists() ) {
2959                                         // Something went wrong
2960
2961                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2962                                                 [ 'missing-revision', $this->oldid ] );
2963                                 }
2964                         }
2965                 }
2966
2967                 if ( wfReadOnly() ) {
2968                         $wgOut->wrapWikiMsg(
2969                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
2970                                 [ 'readonlywarning', wfReadOnlyReason() ]
2971                         );
2972                 } elseif ( $wgUser->isAnon() ) {
2973                         if ( $this->formtype != 'preview' ) {
2974                                 $wgOut->wrapWikiMsg(
2975                                         "<div id='mw-anon-edit-warning' class='warningbox'>\n$1\n</div>",
2976                                         [ 'anoneditwarning',
2977                                                 // Log-in link
2978                                                 SpecialPage::getTitleFor( 'Userlogin' )->getFullURL( [
2979                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
2980                                                 ] ),
2981                                                 // Sign-up link
2982                                                 SpecialPage::getTitleFor( 'CreateAccount' )->getFullURL( [
2983                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
2984                                                 ] )
2985                                         ]
2986                                 );
2987                         } else {
2988                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\" class=\"warningbox\">\n$1</div>",
2989                                         'anonpreviewwarning'
2990                                 );
2991                         }
2992                 } else {
2993                         if ( $this->isCssJsSubpage ) {
2994                                 # Check the skin exists
2995                                 if ( $this->isWrongCaseCssJsPage ) {
2996                                         $wgOut->wrapWikiMsg(
2997                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
2998                                                 [ 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ]
2999                                         );
3000                                 }
3001                                 if ( $this->getTitle()->isSubpageOf( $wgUser->getUserPage() ) ) {
3002                                         $wgOut->wrapWikiMsg( '<div class="mw-usercssjspublic">$1</div>',
3003                                                 $this->isCssSubpage ? 'usercssispublic' : 'userjsispublic'
3004                                         );
3005                                         if ( $this->formtype !== 'preview' ) {
3006                                                 if ( $this->isCssSubpage && $wgAllowUserCss ) {
3007                                                         $wgOut->wrapWikiMsg(
3008                                                                 "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
3009                                                                 [ 'usercssyoucanpreview' ]
3010                                                         );
3011                                                 }
3012
3013                                                 if ( $this->isJsSubpage && $wgAllowUserJs ) {
3014                                                         $wgOut->wrapWikiMsg(
3015                                                                 "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
3016                                                                 [ 'userjsyoucanpreview' ]
3017                                                         );
3018                                                 }
3019                                         }
3020                                 }
3021                         }
3022                 }
3023
3024                 $this->addPageProtectionWarningHeaders();
3025
3026                 $this->addLongPageWarningHeader();
3027
3028                 # Add header copyright warning
3029                 $this->showHeaderCopyrightWarning();
3030         }
3031
3032         /**
3033          * Standard summary input and label (wgSummary), abstracted so EditPage
3034          * subclasses may reorganize the form.
3035          * Note that you do not need to worry about the label's for=, it will be
3036          * inferred by the id given to the input. You can remove them both by
3037          * passing [ 'id' => false ] to $userInputAttrs.
3038          *
3039          * @param string $summary The value of the summary input
3040          * @param string $labelText The html to place inside the label
3041          * @param array $inputAttrs Array of attrs to use on the input
3042          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
3043          *
3044          * @return array An array in the format [ $label, $input ]
3045          */
3046         function getSummaryInput( $summary = "", $labelText = null,
3047                 $inputAttrs = null, $spanLabelAttrs = null
3048         ) {
3049                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
3050                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : [] ) + [
3051                         'id' => 'wpSummary',
3052                         'maxlength' => '200',
3053                         'tabindex' => '1',
3054                         'size' => 60,
3055                         'spellcheck' => 'true',
3056                 ] + Linker::tooltipAndAccesskeyAttribs( 'summary' );
3057
3058                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : [] ) + [
3059                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
3060                         'id' => "wpSummaryLabel"
3061                 ];
3062
3063                 $label = null;
3064                 if ( $labelText ) {
3065                         $label = Xml::tags(
3066                                 'label',
3067                                 $inputAttrs['id'] ? [ 'for' => $inputAttrs['id'] ] : null,
3068                                 $labelText
3069                         );
3070                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
3071                 }
3072
3073                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
3074
3075                 return [ $label, $input ];
3076         }
3077
3078         /**
3079          * @param bool $isSubjectPreview True if this is the section subject/title
3080          *   up top, or false if this is the comment summary
3081          *   down below the textarea
3082          * @param string $summary The text of the summary to display
3083          */
3084         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
3085                 global $wgOut;
3086                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
3087                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
3088                 if ( $isSubjectPreview ) {
3089                         if ( $this->nosummary ) {
3090                                 return;
3091                         }
3092                 } else {
3093                         if ( !$this->mShowSummaryField ) {
3094                                 return;
3095                         }
3096                 }
3097                 $labelText = $this->context->msg( $isSubjectPreview ? 'subject' : 'summary' )->parse();
3098                 list( $label, $input ) = $this->getSummaryInput(
3099                         $summary,
3100                         $labelText,
3101                         [ 'class' => $summaryClass ],
3102                         []
3103                 );
3104                 $wgOut->addHTML( "{$label} {$input}" );
3105         }
3106
3107         /**
3108          * @param bool $isSubjectPreview True if this is the section subject/title
3109          *   up top, or false if this is the comment summary
3110          *   down below the textarea
3111          * @param string $summary The text of the summary to display
3112          * @return string
3113          */
3114         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
3115                 // avoid spaces in preview, gets always trimmed on save
3116                 $summary = trim( $summary );
3117                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
3118                         return "";
3119                 }
3120
3121                 global $wgParser;
3122
3123                 if ( $isSubjectPreview ) {
3124                         $summary = $this->context->msg( 'newsectionsummary' )
3125                                 ->rawParams( $wgParser->stripSectionName( $summary ) )
3126                                 ->inContentLanguage()->text();
3127                 }
3128
3129                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
3130
3131                 $summary = $this->context->msg( $message )->parse()
3132                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
3133                 return Xml::tags( 'div', [ 'class' => 'mw-summary-preview' ], $summary );
3134         }
3135
3136         protected function showFormBeforeText() {
3137                 global $wgOut;
3138                 $section = htmlspecialchars( $this->section );
3139                 $wgOut->addHTML( <<<HTML
3140 <input type='hidden' value="{$section}" name="wpSection"/>
3141 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
3142 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
3143 <input type='hidden' value="{$this->editRevId}" name="editRevId" />
3144 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
3145
3146 HTML
3147                 );
3148                 if ( !$this->checkUnicodeCompliantBrowser() ) {
3149                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
3150                 }
3151         }
3152
3153         protected function showFormAfterText() {
3154                 global $wgOut, $wgUser;
3155                 /**
3156                  * To make it harder for someone to slip a user a page
3157                  * which submits an edit form to the wiki without their
3158                  * knowledge, a random token is associated with the login
3159                  * session. If it's not passed back with the submission,
3160                  * we won't save the page, or render user JavaScript and
3161                  * CSS previews.
3162                  *
3163                  * For anon editors, who may not have a session, we just
3164                  * include the constant suffix to prevent editing from
3165                  * broken text-mangling proxies.
3166                  */
3167                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
3168         }
3169
3170         /**
3171          * Subpage overridable method for printing the form for page content editing
3172          * By default this simply outputs wpTextbox1
3173          * Subclasses can override this to provide a custom UI for editing;
3174          * be it a form, or simply wpTextbox1 with a modified content that will be
3175          * reverse modified when extracted from the post data.
3176          * Note that this is basically the inverse for importContentFormData
3177          */
3178         protected function showContentForm() {
3179                 $this->showTextbox1();
3180         }
3181
3182         /**
3183          * Method to output wpTextbox1
3184          * The $textoverride method can be used by subclasses overriding showContentForm
3185          * to pass back to this method.
3186          *
3187          * @param array $customAttribs Array of html attributes to use in the textarea
3188          * @param string $textoverride Optional text to override $this->textarea1 with
3189          */
3190         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
3191                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
3192                         $attribs = [ 'style' => 'display:none;' ];
3193                 } else {
3194                         $classes = []; // Textarea CSS
3195                         if ( $this->mTitle->isProtected( 'edit' ) &&
3196                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
3197                         ) {
3198                                 # Is the title semi-protected?
3199                                 if ( $this->mTitle->isSemiProtected() ) {
3200                                         $classes[] = 'mw-textarea-sprotected';
3201                                 } else {
3202                                         # Then it must be protected based on static groups (regular)
3203                                         $classes[] = 'mw-textarea-protected';
3204                                 }
3205                                 # Is the title cascade-protected?
3206                                 if ( $this->mTitle->isCascadeProtected() ) {
3207                                         $classes[] = 'mw-textarea-cprotected';
3208                                 }
3209                         }
3210                         # Is an old revision being edited?
3211                         if ( $this->isOldRev ) {
3212                                 $classes[] = 'mw-textarea-oldrev';
3213                         }
3214
3215                         $attribs = [ 'tabindex' => 1 ];
3216
3217                         if ( is_array( $customAttribs ) ) {
3218                                 $attribs += $customAttribs;
3219                         }
3220
3221                         if ( count( $classes ) ) {
3222                                 if ( isset( $attribs['class'] ) ) {
3223                                         $classes[] = $attribs['class'];
3224                                 }
3225                                 $attribs['class'] = implode( ' ', $classes );
3226                         }
3227                 }
3228
3229                 $this->showTextbox(
3230                         $textoverride !== null ? $textoverride : $this->textbox1,
3231                         'wpTextbox1',
3232                         $attribs
3233                 );
3234         }
3235
3236         protected function showTextbox2() {
3237                 $this->showTextbox( $this->textbox2, 'wpTextbox2', [ 'tabindex' => 6, 'readonly' ] );
3238         }
3239
3240         protected function showTextbox( $text, $name, $customAttribs = [] ) {
3241                 global $wgOut, $wgUser;
3242
3243                 $wikitext = $this->safeUnicodeOutput( $text );
3244                 if ( strval( $wikitext ) !== '' ) {
3245                         // Ensure there's a newline at the end, otherwise adding lines
3246                         // is awkward.
3247                         // But don't add a newline if the ext is empty, or Firefox in XHTML
3248                         // mode will show an extra newline. A bit annoying.
3249                         $wikitext .= "\n";
3250                 }
3251
3252                 $attribs = $customAttribs + [
3253                         'accesskey' => ',',
3254                         'id' => $name,
3255                         'cols' => $wgUser->getIntOption( 'cols' ),
3256                         'rows' => $wgUser->getIntOption( 'rows' ),
3257                         // Avoid PHP notices when appending preferences
3258                         // (appending allows customAttribs['style'] to still work).
3259                         'style' => ''
3260                 ];
3261
3262                 // The following classes can be used here:
3263                 // * mw-editfont-default
3264                 // * mw-editfont-monospace
3265                 // * mw-editfont-sans-serif
3266                 // * mw-editfont-serif
3267                 $class = 'mw-editfont-' . $wgUser->getOption( 'editfont' );
3268
3269                 if ( isset( $attribs['class'] ) ) {
3270                         if ( is_string( $attribs['class'] ) ) {
3271                                 $attribs['class'] .= ' ' . $class;
3272                         } elseif ( is_array( $attribs['class'] ) ) {
3273                                 $attribs['class'][] = $class;
3274                         }
3275                 } else {
3276                         $attribs['class'] = $class;
3277                 }
3278
3279                 $pageLang = $this->mTitle->getPageLanguage();
3280                 $attribs['lang'] = $pageLang->getHtmlCode();
3281                 $attribs['dir'] = $pageLang->getDir();
3282
3283                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
3284         }
3285
3286         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
3287                 global $wgOut;
3288                 $classes = [];
3289                 if ( $isOnTop ) {
3290                         $classes[] = 'ontop';
3291                 }
3292
3293                 $attribs = [ 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) ];
3294
3295                 if ( $this->formtype != 'preview' ) {
3296                         $attribs['style'] = 'display: none;';
3297                 }
3298
3299                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
3300
3301                 if ( $this->formtype == 'preview' ) {
3302                         $this->showPreview( $previewOutput );
3303                 } else {
3304                         // Empty content container for LivePreview
3305                         $pageViewLang = $this->mTitle->getPageViewLanguage();
3306                         $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3307                                 'class' => 'mw-content-' . $pageViewLang->getDir() ];
3308                         $wgOut->addHTML( Html::rawElement( 'div', $attribs ) );
3309                 }
3310
3311                 $wgOut->addHTML( '</div>' );
3312
3313                 if ( $this->formtype == 'diff' ) {
3314                         try {
3315                                 $this->showDiff();
3316                         } catch ( MWContentSerializationException $ex ) {
3317                                 $msg = $this->context->msg(
3318                                         'content-failed-to-parse',
3319                                         $this->contentModel,
3320                                         $this->contentFormat,
3321                                         $ex->getMessage()
3322                                 );
3323                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3324                         }
3325                 }
3326         }
3327
3328         /**
3329          * Append preview output to $wgOut.
3330          * Includes category rendering if this is a category page.
3331          *
3332          * @param string $text The HTML to be output for the preview.
3333          */
3334         protected function showPreview( $text ) {
3335                 global $wgOut;
3336                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3337                         $this->mArticle->openShowCategory();
3338                 }
3339                 # This hook seems slightly odd here, but makes things more
3340                 # consistent for extensions.
3341                 Hooks::run( 'OutputPageBeforeHTML', [ &$wgOut, &$text ] );
3342                 $wgOut->addHTML( $text );
3343                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3344                         $this->mArticle->closeShowCategory();
3345                 }
3346         }
3347
3348         /**
3349          * Get a diff between the current contents of the edit box and the
3350          * version of the page we're editing from.
3351          *
3352          * If this is a section edit, we'll replace the section as for final
3353          * save and then make a comparison.
3354          */
3355         function showDiff() {
3356                 global $wgUser, $wgContLang, $wgOut;
3357
3358                 $oldtitlemsg = 'currentrev';
3359                 # if message does not exist, show diff against the preloaded default
3360                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3361                         $oldtext = $this->mTitle->getDefaultMessageText();
3362                         if ( $oldtext !== false ) {
3363                                 $oldtitlemsg = 'defaultmessagetext';
3364                                 $oldContent = $this->toEditContent( $oldtext );
3365                         } else {
3366                                 $oldContent = null;
3367                         }
3368                 } else {
3369                         $oldContent = $this->getCurrentContent();
3370                 }
3371
3372                 $textboxContent = $this->toEditContent( $this->textbox1 );
3373                 if ( $this->editRevId !== null ) {
3374                         $newContent = $this->page->replaceSectionAtRev(
3375                                 $this->section, $textboxContent, $this->summary, $this->editRevId
3376                         );
3377                 } else {
3378                         $newContent = $this->page->replaceSectionContent(
3379                                 $this->section, $textboxContent, $this->summary, $this->edittime
3380                         );
3381                 }
3382
3383                 if ( $newContent ) {
3384                         ContentHandler::runLegacyHooks( 'EditPageGetDiffText', [ $this, &$newContent ], '1.21' );
3385                         Hooks::run( 'EditPageGetDiffContent', [ $this, &$newContent ] );
3386
3387                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
3388                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
3389                 }
3390
3391                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3392                         $oldtitle = $this->context->msg( $oldtitlemsg )->parse();
3393                         $newtitle = $this->context->msg( 'yourtext' )->parse();
3394
3395                         if ( !$oldContent ) {
3396                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3397                         }
3398
3399                         if ( !$newContent ) {
3400                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3401                         }
3402
3403                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
3404                         $de->setContent( $oldContent, $newContent );
3405
3406                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3407                         $de->showDiffStyle();
3408                 } else {
3409                         $difftext = '';
3410                 }
3411
3412                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3413         }
3414
3415         /**
3416          * Show the header copyright warning.
3417          */
3418         protected function showHeaderCopyrightWarning() {
3419                 $msg = 'editpage-head-copy-warn';
3420                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3421                         global $wgOut;
3422                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3423                                 'editpage-head-copy-warn' );
3424                 }
3425         }
3426
3427         /**
3428          * Give a chance for site and per-namespace customizations of
3429          * terms of service summary link that might exist separately
3430          * from the copyright notice.
3431          *
3432          * This will display between the save button and the edit tools,
3433          * so should remain short!
3434          */
3435         protected function showTosSummary() {
3436                 $msg = 'editpage-tos-summary';
3437                 Hooks::run( 'EditPageTosSummary', [ $this->mTitle, &$msg ] );
3438                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3439                         global $wgOut;
3440                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
3441                         $wgOut->addWikiMsg( $msg );
3442                         $wgOut->addHTML( '</div>' );
3443                 }
3444         }
3445
3446         protected function showEditTools() {
3447                 global $wgOut;
3448                 $wgOut->addHTML( '<div class="mw-editTools">' .
3449                         $this->context->msg( 'edittools' )->inContentLanguage()->parse() .
3450                         '</div>' );
3451         }
3452
3453         /**
3454          * Get the copyright warning
3455          *
3456          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3457          * @return string
3458          */
3459         protected function getCopywarn() {
3460                 return self::getCopyrightWarning( $this->mTitle );
3461         }
3462
3463         /**
3464          * Get the copyright warning, by default returns wikitext
3465          *
3466          * @param Title $title
3467          * @param string $format Output format, valid values are any function of a Message object
3468          * @return string
3469          */
3470         public static function getCopyrightWarning( $title, $format = 'plain', $langcode = null ) {
3471                 global $wgRightsText;
3472                 if ( $wgRightsText ) {
3473                         $copywarnMsg = [ 'copyrightwarning',
3474                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3475                                 $wgRightsText ];
3476                 } else {
3477                         $copywarnMsg = [ 'copyrightwarning2',
3478                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' ];
3479                 }
3480                 // Allow for site and per-namespace customization of contribution/copyright notice.
3481                 Hooks::run( 'EditPageCopyrightWarning', [ $title, &$copywarnMsg ] );
3482
3483                 $msg = call_user_func_array( 'wfMessage', $copywarnMsg )->title( $title );
3484                 if ( $langcode ) {
3485                         $msg->inLanguage( $langcode );
3486                 }
3487                 return "<div id=\"editpage-copywarn\">\n" .
3488                         $msg->$format() . "\n</div>";
3489         }
3490
3491         /**
3492          * Get the Limit report for page previews
3493          *
3494          * @since 1.22
3495          * @param ParserOutput $output ParserOutput object from the parse
3496          * @return string HTML
3497          */
3498         public static function getPreviewLimitReport( $output ) {
3499                 if ( !$output || !$output->getLimitReportData() ) {
3500                         return '';
3501                 }
3502
3503                 $limitReport = Html::rawElement( 'div', [ 'class' => 'mw-limitReportExplanation' ],
3504                         wfMessage( 'limitreport-title' )->parseAsBlock()
3505                 );
3506
3507                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3508                 $limitReport .= Html::openElement( 'div', [ 'class' => 'preview-limit-report-wrapper' ] );
3509
3510                 $limitReport .= Html::openElement( 'table', [
3511                         'class' => 'preview-limit-report wikitable'
3512                 ] ) .
3513                         Html::openElement( 'tbody' );
3514
3515                 foreach ( $output->getLimitReportData()['limitreport'] as $key => $value ) {
3516                         if ( Hooks::run( 'ParserLimitReportFormat',
3517                                 [ $key, &$value, &$limitReport, true, true ]
3518                         ) ) {
3519                                 $keyMsg = wfMessage( "limitreport-$key" );
3520                                 $valueMsg = wfMessage(
3521                                         [ "limitreport-$key-value-html", "limitreport-$key-value" ]
3522                                 );
3523                                 if ( !$valueMsg->exists() ) {
3524                                         $valueMsg = new RawMessage( '$1' );
3525                                 }
3526                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3527                                         // If it's a value/limit array, convert it for $1/$2
3528                                         if ( is_array( $value ) && isset( $value['value'] ) ) {
3529                                                 $value = [ $value['value'], $value['limit'] ];
3530                                         }
3531                                         $limitReport .= Html::openElement( 'tr' ) .
3532                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3533                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
3534                                                 Html::closeElement( 'tr' );
3535                                 }
3536                         }
3537                 }
3538
3539                 $limitReport .= Html::closeElement( 'tbody' ) .
3540                         Html::closeElement( 'table' ) .
3541                         Html::closeElement( 'div' );
3542
3543                 return $limitReport;
3544         }
3545
3546         protected function showStandardInputs( &$tabindex = 2 ) {
3547                 global $wgOut;
3548                 $wgOut->addHTML( "<div class='editOptions'>\n" );
3549
3550                 if ( $this->section != 'new' ) {
3551                         $this->showSummaryInput( false, $this->summary );
3552                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3553                 }
3554
3555                 $checkboxes = $this->getCheckboxes( $tabindex,
3556                         [ 'minor' => $this->minoredit, 'watch' => $this->watchthis ] );
3557                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
3558
3559                 // Show copyright warning.
3560                 $wgOut->addWikiText( $this->getCopywarn() );
3561                 $wgOut->addHTML( $this->editFormTextAfterWarn );
3562
3563                 $wgOut->addHTML( "<div class='editButtons'>\n" );
3564                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3565
3566                 $cancel = $this->getCancelLink();
3567                 if ( $cancel !== '' ) {
3568                         $cancel .= Html::element( 'span',
3569                                 [ 'class' => 'mw-editButtons-pipe-separator' ],
3570                                 $this->context->msg( 'pipe-separator' )->text() );
3571                 }
3572
3573                 $message = $this->context->msg( 'edithelppage' )->inContentLanguage()->text();
3574                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3575                 $attrs = [
3576                         'target' => 'helpwindow',
3577                         'href' => $edithelpurl,
3578                 ];
3579                 $edithelp = Html::linkButton( $this->context->msg( 'edithelp' )->text(),
3580                         $attrs, [ 'mw-ui-quiet' ] ) .
3581                         $this->context->msg( 'word-separator' )->escaped() .
3582                         $this->context->msg( 'newwindow' )->parse();
3583
3584                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
3585                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
3586                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
3587
3588                 Hooks::run( 'EditPage::showStandardInputs:options', [ $this, $wgOut, &$tabindex ] );
3589
3590                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
3591         }
3592
3593         /**
3594          * Show an edit conflict. textbox1 is already shown in showEditForm().
3595          * If you want to use another entry point to this function, be careful.
3596          */
3597         protected function showConflict() {
3598                 global $wgOut;
3599
3600                 if ( Hooks::run( 'EditPageBeforeConflictDiff', [ &$this, &$wgOut ] ) ) {
3601                         $stats = $wgOut->getContext()->getStats();
3602                         $stats->increment( 'edit.failures.conflict' );
3603                         // Only include 'standard' namespaces to avoid creating unknown numbers of statsd metrics
3604                         if (
3605                                 $this->mTitle->getNamespace() >= NS_MAIN &&
3606                                 $this->mTitle->getNamespace() <= NS_CATEGORY_TALK
3607                         ) {
3608                                 $stats->increment( 'edit.failures.conflict.byNamespaceId.' . $this->mTitle->getNamespace() );
3609                         }
3610
3611                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3612
3613                         $content1 = $this->toEditContent( $this->textbox1 );
3614                         $content2 = $this->toEditContent( $this->textbox2 );
3615
3616                         $handler = ContentHandler::getForModelID( $this->contentModel );
3617                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3618                         $de->setContent( $content2, $content1 );
3619                         $de->showDiff(
3620                                 $this->context->msg( 'yourtext' )->parse(),
3621                                 $this->context->msg( 'storedversion' )->text()
3622                         );
3623
3624                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3625                         $this->showTextbox2();
3626                 }
3627         }
3628
3629         /**
3630          * @return string
3631          */
3632         public function getCancelLink() {
3633                 $cancelParams = [];
3634                 if ( !$this->isConflict && $this->oldid > 0 ) {
3635                         $cancelParams['oldid'] = $this->oldid;
3636                 } elseif ( $this->getContextTitle()->isRedirect() ) {
3637                         $cancelParams['redirect'] = 'no';
3638                 }
3639                 $attrs = [ 'id' => 'mw-editform-cancel' ];
3640
3641                 return Linker::linkKnown(
3642                         $this->getContextTitle(),
3643                         $this->context->msg( 'cancel' )->parse(),
3644                         Html::buttonAttributes( $attrs, [ 'mw-ui-quiet' ] ),
3645                         $cancelParams
3646                 );
3647         }
3648
3649         /**
3650          * Returns the URL to use in the form's action attribute.
3651          * This is used by EditPage subclasses when simply customizing the action
3652          * variable in the constructor is not enough. This can be used when the
3653          * EditPage lives inside of a Special page rather than a custom page action.
3654          *
3655          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3656          * @return string
3657          */
3658         protected function getActionURL( Title $title ) {
3659                 return $title->getLocalURL( [ 'action' => $this->action ] );
3660         }
3661
3662         /**
3663          * Check if a page was deleted while the user was editing it, before submit.
3664          * Note that we rely on the logging table, which hasn't been always there,
3665          * but that doesn't matter, because this only applies to brand new
3666          * deletes.
3667          * @return bool
3668          */
3669         protected function wasDeletedSinceLastEdit() {
3670                 if ( $this->deletedSinceEdit !== null ) {
3671                         return $this->deletedSinceEdit;
3672                 }
3673
3674                 $this->deletedSinceEdit = false;
3675
3676                 if ( !$this->mTitle->exists() && $this->mTitle->isDeletedQuick() ) {
3677                         $this->lastDelete = $this->getLastDelete();
3678                         if ( $this->lastDelete ) {
3679                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3680                                 if ( $deleteTime > $this->starttime ) {
3681                                         $this->deletedSinceEdit = true;
3682                                 }
3683                         }
3684                 }
3685
3686                 return $this->deletedSinceEdit;
3687         }
3688
3689         /**
3690          * @return bool|stdClass
3691          */
3692         protected function getLastDelete() {
3693                 $dbr = wfGetDB( DB_REPLICA );
3694                 $data = $dbr->selectRow(
3695                         [ 'logging', 'user' ],
3696                         [
3697                                 'log_type',
3698                                 'log_action',
3699                                 'log_timestamp',
3700                                 'log_user',
3701                                 'log_namespace',
3702                                 'log_title',
3703                                 'log_comment',
3704                                 'log_params',
3705                                 'log_deleted',
3706                                 'user_name'
3707                         ], [
3708                                 'log_namespace' => $this->mTitle->getNamespace(),
3709                                 'log_title' => $this->mTitle->getDBkey(),
3710                                 'log_type' => 'delete',
3711                                 'log_action' => 'delete',
3712                                 'user_id=log_user'
3713                         ],
3714                         __METHOD__,
3715                         [ 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ]
3716                 );
3717                 // Quick paranoid permission checks...
3718                 if ( is_object( $data ) ) {
3719                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3720                                 $data->user_name = $this->context->msg( 'rev-deleted-user' )->escaped();
3721                         }
3722
3723                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3724                                 $data->log_comment = $this->context->msg( 'rev-deleted-comment' )->escaped();
3725                         }
3726                 }
3727
3728                 return $data;
3729         }
3730
3731         /**
3732          * Get the rendered text for previewing.
3733          * @throws MWException
3734          * @return string
3735          */
3736         function getPreviewText() {
3737                 global $wgOut, $wgRawHtml, $wgLang;
3738                 global $wgAllowUserCss, $wgAllowUserJs;
3739
3740                 $stats = $wgOut->getContext()->getStats();
3741
3742                 if ( $wgRawHtml && !$this->mTokenOk ) {
3743                         // Could be an offsite preview attempt. This is very unsafe if
3744                         // HTML is enabled, as it could be an attack.
3745                         $parsedNote = '';
3746                         if ( $this->textbox1 !== '' ) {
3747                                 // Do not put big scary notice, if previewing the empty
3748                                 // string, which happens when you initially edit
3749                                 // a category page, due to automatic preview-on-open.
3750                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3751                                         $this->context->msg( 'session_fail_preview_html' )->text() . "</div>",
3752                                         true, /* interface */true );
3753                         }
3754                         $stats->increment( 'edit.failures.session_loss' );
3755                         return $parsedNote;
3756                 }
3757
3758                 $note = '';
3759
3760                 try {
3761                         $content = $this->toEditContent( $this->textbox1 );
3762
3763                         $previewHTML = '';
3764                         if ( !Hooks::run(
3765                                 'AlternateEditPreview',
3766                                 [ $this, &$content, &$previewHTML, &$this->mParserOutput ] )
3767                         ) {
3768                                 return $previewHTML;
3769                         }
3770
3771                         # provide a anchor link to the editform
3772                         $continueEditing = '<span class="mw-continue-editing">' .
3773                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3774                                 $this->context->msg( 'continue-editing' )->text() . ']]</span>';
3775                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3776                                 if ( $this->mTokenOkExceptSuffix ) {
3777                                         $note = $this->context->msg( 'token_suffix_mismatch' )->plain();
3778                                         $stats->increment( 'edit.failures.bad_token' );
3779                                 } else {
3780                                         $note = $this->context->msg( 'session_fail_preview' )->plain();
3781                                         $stats->increment( 'edit.failures.session_loss' );
3782                                 }
3783                         } elseif ( $this->incompleteForm ) {
3784                                 $note = $this->context->msg( 'edit_form_incomplete' )->plain();
3785                                 if ( $this->mTriedSave ) {
3786                                         $stats->increment( 'edit.failures.incomplete_form' );
3787                                 }
3788                         } else {
3789                                 $note = $this->context->msg( 'previewnote' )->plain() . ' ' . $continueEditing;
3790                         }
3791
3792                         # don't parse non-wikitext pages, show message about preview
3793                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3794                                 if ( $this->mTitle->isCssJsSubpage() ) {
3795                                         $level = 'user';
3796                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3797                                         $level = 'site';
3798                                 } else {
3799                                         $level = false;
3800                                 }
3801
3802                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3803                                         $format = 'css';
3804                                         if ( $level === 'user' && !$wgAllowUserCss ) {
3805                                                 $format = false;
3806                                         }
3807                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3808                                         $format = 'js';
3809                                         if ( $level === 'user' && !$wgAllowUserJs ) {
3810                                                 $format = false;
3811                                         }
3812                                 } else {
3813                                         $format = false;
3814                                 }
3815
3816                                 # Used messages to make sure grep find them:
3817                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3818                                 if ( $level && $format ) {
3819                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3820                                                 $this->context->msg( "{$level}{$format}preview" )->text() .
3821                                                 ' ' . $continueEditing . "</div>";
3822                                 }
3823                         }
3824
3825                         # If we're adding a comment, we need to show the
3826                         # summary as the headline
3827                         if ( $this->section === "new" && $this->summary !== "" ) {
3828                                 $content = $content->addSectionHeader( $this->summary );
3829                         }
3830
3831                         $hook_args = [ $this, &$content ];
3832                         ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args, '1.25' );
3833                         Hooks::run( 'EditPageGetPreviewContent', $hook_args );
3834
3835                         $parserResult = $this->doPreviewParse( $content );
3836                         $parserOutput = $parserResult['parserOutput'];
3837                         $previewHTML = $parserResult['html'];
3838                         $this->mParserOutput = $parserOutput;
3839                         $wgOut->addParserOutputMetadata( $parserOutput );
3840
3841                         if ( count( $parserOutput->getWarnings() ) ) {
3842                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3843                         }
3844
3845                 } catch ( MWContentSerializationException $ex ) {
3846                         $m = $this->context->msg(
3847                                 'content-failed-to-parse',
3848                                 $this->contentModel,
3849                                 $this->contentFormat,
3850                                 $ex->getMessage()
3851                         );
3852                         $note .= "\n\n" . $m->parse();
3853                         $previewHTML = '';
3854                 }
3855
3856                 if ( $this->isConflict ) {
3857                         $conflict = '<h2 id="mw-previewconflict">'
3858                                 . $this->context->msg( 'previewconflict' )->escaped() . "</h2>\n";
3859                 } else {
3860                         $conflict = '<hr />';
3861                 }
3862
3863                 $previewhead = "<div class='previewnote'>\n" .
3864                         '<h2 id="mw-previewheader">' . $this->context->msg( 'preview' )->escaped() . "</h2>" .
3865                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3866
3867                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3868                 $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3869                         'class' => 'mw-content-' . $pageViewLang->getDir() ];
3870                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3871
3872                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3873         }
3874
3875         /**
3876          * Get parser options for a preview
3877          * @return ParserOptions
3878          */
3879         protected function getPreviewParserOptions() {
3880                 $parserOptions = $this->page->makeParserOptions( $this->mArticle->getContext() );
3881                 $parserOptions->setIsPreview( true );
3882                 $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3883                 $parserOptions->enableLimitReport();
3884                 return $parserOptions;
3885         }
3886
3887         /**
3888          * Parse the page for a preview. Subclasses may override this class, in order
3889          * to parse with different options, or to otherwise modify the preview HTML.
3890          *
3891          * @param Content $content The page content
3892          * @return array with keys:
3893          *   - parserOutput: The ParserOutput object
3894          *   - html: The HTML to be displayed
3895          */
3896         protected function doPreviewParse( Content $content ) {
3897                 global $wgUser;
3898                 $parserOptions = $this->getPreviewParserOptions();
3899                 $pstContent = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3900                 $scopedCallback = $parserOptions->setupFakeRevision(
3901                         $this->mTitle, $pstContent, $wgUser );
3902                 $parserOutput = $pstContent->getParserOutput( $this->mTitle, null, $parserOptions );
3903                 ScopedCallback::consume( $scopedCallback );
3904                 $parserOutput->setEditSectionTokens( false ); // no section edit links
3905                 return [
3906                         'parserOutput' => $parserOutput,
3907                         'html' => $parserOutput->getText() ];
3908         }
3909
3910         /**
3911          * @return array
3912          */
3913         function getTemplates() {
3914                 if ( $this->preview || $this->section != '' ) {
3915                         $templates = [];
3916                         if ( !isset( $this->mParserOutput ) ) {
3917                                 return $templates;
3918                         }
3919                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3920                                 foreach ( array_keys( $template ) as $dbk ) {
3921                                         $templates[] = Title::makeTitle( $ns, $dbk );
3922                                 }
3923                         }
3924                         return $templates;
3925                 } else {
3926                         return $this->mTitle->getTemplateLinksFrom();
3927                 }
3928         }
3929
3930         /**
3931          * Shows a bulletin board style toolbar for common editing functions.
3932          * It can be disabled in the user preferences.
3933          *
3934          * @param Title $title Title object for the page being edited (optional)
3935          * @return string
3936          */
3937         static function getEditToolbar( $title = null ) {
3938                 global $wgContLang, $wgOut;
3939                 global $wgEnableUploads, $wgForeignFileRepos;
3940
3941                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3942                 $showSignature = true;
3943                 if ( $title ) {
3944                         $showSignature = MWNamespace::wantSignatures( $title->getNamespace() );
3945                 }
3946
3947                 /**
3948                  * $toolarray is an array of arrays each of which includes the
3949                  * opening tag, the closing tag, optionally a sample text that is
3950                  * inserted between the two when no selection is highlighted
3951                  * and.  The tip text is shown when the user moves the mouse
3952                  * over the button.
3953                  *
3954                  * Images are defined in ResourceLoaderEditToolbarModule.
3955                  */
3956                 $toolarray = [
3957                         [
3958                                 'id'     => 'mw-editbutton-bold',
3959                                 'open'   => '\'\'\'',
3960                                 'close'  => '\'\'\'',
3961                                 'sample' => wfMessage( 'bold_sample' )->text(),
3962                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3963                         ],
3964                         [
3965                                 'id'     => 'mw-editbutton-italic',
3966                                 'open'   => '\'\'',
3967                                 'close'  => '\'\'',
3968                                 'sample' => wfMessage( 'italic_sample' )->text(),
3969                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3970                         ],
3971                         [
3972                                 'id'     => 'mw-editbutton-link',
3973                                 'open'   => '[[',
3974                                 'close'  => ']]',
3975                                 'sample' => wfMessage( 'link_sample' )->text(),
3976                                 'tip'    => wfMessage( 'link_tip' )->text(),
3977                         ],
3978                         [
3979                                 'id'     => 'mw-editbutton-extlink',
3980                                 'open'   => '[',
3981                                 'close'  => ']',
3982                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3983                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3984                         ],
3985                         [
3986                                 'id'     => 'mw-editbutton-headline',
3987                                 'open'   => "\n== ",
3988                                 'close'  => " ==\n",
3989                                 'sample' => wfMessage( 'headline_sample' )->text(),
3990                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3991                         ],
3992                         $imagesAvailable ? [
3993                                 'id'     => 'mw-editbutton-image',
3994                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3995                                 'close'  => ']]',
3996                                 'sample' => wfMessage( 'image_sample' )->text(),
3997                                 'tip'    => wfMessage( 'image_tip' )->text(),
3998                         ] : false,
3999                         $imagesAvailable ? [
4000                                 'id'     => 'mw-editbutton-media',
4001                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
4002                                 'close'  => ']]',
4003                                 'sample' => wfMessage( 'media_sample' )->text(),
4004                                 'tip'    => wfMessage( 'media_tip' )->text(),
4005                         ] : false,
4006                         [
4007                                 'id'     => 'mw-editbutton-nowiki',
4008                                 'open'   => "<nowiki>",
4009                                 'close'  => "</nowiki>",
4010                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
4011                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
4012                         ],
4013                         $showSignature ? [
4014                                 'id'     => 'mw-editbutton-signature',
4015                                 'open'   => wfMessage( 'sig-text', '~~~~' )->inContentLanguage()->text(),
4016                                 'close'  => '',
4017                                 'sample' => '',
4018                                 'tip'    => wfMessage( 'sig_tip' )->text(),
4019                         ] : false,
4020                         [
4021                                 'id'     => 'mw-editbutton-hr',
4022                                 'open'   => "\n----\n",
4023                                 'close'  => '',
4024                                 'sample' => '',
4025                                 'tip'    => wfMessage( 'hr_tip' )->text(),
4026                         ]
4027                 ];
4028
4029                 $script = 'mw.loader.using("mediawiki.toolbar", function () {';
4030                 foreach ( $toolarray as $tool ) {
4031                         if ( !$tool ) {
4032                                 continue;
4033                         }
4034
4035                         $params = [
4036                                 // Images are defined in ResourceLoaderEditToolbarModule
4037                                 false,
4038                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
4039                                 // Older browsers show a "speedtip" type message only for ALT.
4040                                 // Ideally these should be different, realistically they
4041                                 // probably don't need to be.
4042                                 $tool['tip'],
4043                                 $tool['open'],
4044                                 $tool['close'],
4045                                 $tool['sample'],
4046                                 $tool['id'],
4047                         ];
4048
4049                         $script .= Xml::encodeJsCall(
4050                                 'mw.toolbar.addButton',
4051                                 $params,
4052                                 ResourceLoader::inDebugMode()
4053                         );
4054                 }
4055
4056                 $script .= '});';
4057                 $wgOut->addScript( ResourceLoader::makeInlineScript( $script ) );
4058
4059                 $toolbar = '<div id="toolbar"></div>';
4060
4061                 Hooks::run( 'EditPageBeforeEditToolbar', [ &$toolbar ] );
4062
4063                 return $toolbar;
4064         }
4065
4066         /**
4067          * Returns an array of html code of the following checkboxes:
4068          * minor and watch
4069          *
4070          * @param int $tabindex Current tabindex
4071          * @param array $checked Array of checkbox => bool, where bool indicates the checked
4072          *                 status of the checkbox
4073          *
4074          * @return array
4075          */
4076         public function getCheckboxes( &$tabindex, $checked ) {
4077                 global $wgUser, $wgUseMediaWikiUIEverywhere;
4078
4079                 $checkboxes = [];
4080
4081                 // don't show the minor edit checkbox if it's a new page or section
4082                 if ( !$this->isNew ) {
4083                         $checkboxes['minor'] = '';
4084                         $minorLabel = $this->context->msg( 'minoredit' )->parse();
4085                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
4086                                 $attribs = [
4087                                         'tabindex' => ++$tabindex,
4088                                         'accesskey' => $this->context->msg( 'accesskey-minoredit' )->text(),
4089                                         'id' => 'wpMinoredit',
4090                                 ];
4091                                 $minorEditHtml =
4092                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
4093                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
4094                                         Xml::expandAttributes( [ 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ] ) .
4095                                         ">{$minorLabel}</label>";
4096
4097                                 if ( $wgUseMediaWikiUIEverywhere ) {
4098                                         $checkboxes['minor'] = Html::openElement( 'div', [ 'class' => 'mw-ui-checkbox' ] ) .
4099                                                 $minorEditHtml .
4100                                         Html::closeElement( 'div' );
4101                                 } else {
4102                                         $checkboxes['minor'] = $minorEditHtml;
4103                                 }
4104                         }
4105                 }
4106
4107                 $watchLabel = $this->context->msg( 'watchthis' )->parse();
4108                 $checkboxes['watch'] = '';
4109                 if ( $wgUser->isLoggedIn() ) {
4110                         $attribs = [
4111                                 'tabindex' => ++$tabindex,
4112                                 'accesskey' => $this->context->msg( 'accesskey-watch' )->text(),
4113                                 'id' => 'wpWatchthis',
4114                         ];
4115                         $watchThisHtml =
4116                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
4117                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
4118                                 Xml::expandAttributes( [ 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ] ) .
4119                                 ">{$watchLabel}</label>";
4120                         if ( $wgUseMediaWikiUIEverywhere ) {
4121                                 $checkboxes['watch'] = Html::openElement( 'div', [ 'class' => 'mw-ui-checkbox' ] ) .
4122                                         $watchThisHtml .
4123                                         Html::closeElement( 'div' );
4124                         } else {
4125                                 $checkboxes['watch'] = $watchThisHtml;
4126                         }
4127                 }
4128                 Hooks::run( 'EditPageBeforeEditChecks', [ &$this, &$checkboxes, &$tabindex ] );
4129                 return $checkboxes;
4130         }
4131
4132         /**
4133          * Returns an array of html code of the following buttons:
4134          * save, diff, preview and live
4135          *
4136          * @param int $tabindex Current tabindex
4137          *
4138          * @return array
4139          */
4140         public function getEditButtons( &$tabindex ) {
4141                 $buttons = [];
4142
4143                 $labelAsPublish =
4144                         $this->mArticle->getContext()->getConfig()->get( 'EditSubmitButtonLabelPublish' );
4145
4146                 // Can't use $this->isNew as that's also true if we're adding a new section to an extant page
4147                 if ( $labelAsPublish ) {
4148                         $buttonLabelKey = !$this->mTitle->exists() ? 'publishpage' : 'publishchanges';
4149                 } else {
4150                         $buttonLabelKey = !$this->mTitle->exists() ? 'savearticle' : 'savechanges';
4151                 }
4152                 $buttonLabel = $this->context->msg( $buttonLabelKey )->text();
4153                 $attribs = [
4154                         'id' => 'wpSave',
4155                         'name' => 'wpSave',
4156                         'tabindex' => ++$tabindex,
4157                 ] + Linker::tooltipAndAccesskeyAttribs( 'save' );
4158                 $buttons['save'] = Html::submitButton( $buttonLabel, $attribs, [ 'mw-ui-progressive' ] );
4159
4160                 ++$tabindex; // use the same for preview and live preview
4161                 $attribs = [
4162                         'id' => 'wpPreview',
4163                         'name' => 'wpPreview',
4164                         'tabindex' => $tabindex,
4165                 ] + Linker::tooltipAndAccesskeyAttribs( 'preview' );
4166                 $buttons['preview'] = Html::submitButton( $this->context->msg( 'showpreview' )->text(),
4167                         $attribs );
4168                 $buttons['live'] = '';
4169
4170                 $attribs = [
4171                         'id' => 'wpDiff',
4172                         'name' => 'wpDiff',
4173                         'tabindex' => ++$tabindex,
4174                 ] + Linker::tooltipAndAccesskeyAttribs( 'diff' );
4175                 $buttons['diff'] = Html::submitButton( $this->context->msg( 'showdiff' )->text(),
4176                         $attribs );
4177
4178                 Hooks::run( 'EditPageBeforeEditButtons', [ &$this, &$buttons, &$tabindex ] );
4179                 return $buttons;
4180         }
4181
4182         /**
4183          * Creates a basic error page which informs the user that
4184          * they have attempted to edit a nonexistent section.
4185          */
4186         function noSuchSectionPage() {
4187                 global $wgOut;
4188
4189                 $wgOut->prepareErrorPage( $this->context->msg( 'nosuchsectiontitle' ) );
4190
4191                 $res = $this->context->msg( 'nosuchsectiontext', $this->section )->parseAsBlock();
4192                 Hooks::run( 'EditPageNoSuchSection', [ &$this, &$res ] );
4193                 $wgOut->addHTML( $res );
4194
4195                 $wgOut->returnToMain( false, $this->mTitle );
4196         }
4197
4198         /**
4199          * Show "your edit contains spam" page with your diff and text
4200          *
4201          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
4202          */
4203         public function spamPageWithContent( $match = false ) {
4204                 global $wgOut, $wgLang;
4205                 $this->textbox2 = $this->textbox1;
4206
4207                 if ( is_array( $match ) ) {
4208                         $match = $wgLang->listToText( $match );
4209                 }
4210                 $wgOut->prepareErrorPage( $this->context->msg( 'spamprotectiontitle' ) );
4211
4212                 $wgOut->addHTML( '<div id="spamprotected">' );
4213                 $wgOut->addWikiMsg( 'spamprotectiontext' );
4214                 if ( $match ) {
4215                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
4216                 }
4217                 $wgOut->addHTML( '</div>' );
4218
4219                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
4220                 $this->showDiff();
4221
4222                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
4223                 $this->showTextbox2();
4224
4225                 $wgOut->addReturnTo( $this->getContextTitle(), [ 'action' => 'edit' ] );
4226         }
4227
4228         /**
4229          * Check if the browser is on a blacklist of user-agents known to
4230          * mangle UTF-8 data on form submission. Returns true if Unicode
4231          * should make it through, false if it's known to be a problem.
4232          * @return bool
4233          */
4234         private function checkUnicodeCompliantBrowser() {
4235                 global $wgBrowserBlackList, $wgRequest;
4236
4237                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
4238                 if ( $currentbrowser === false ) {
4239                         // No User-Agent header sent? Trust it by default...
4240                         return true;
4241                 }
4242
4243                 foreach ( $wgBrowserBlackList as $browser ) {
4244                         if ( preg_match( $browser, $currentbrowser ) ) {
4245                                 return false;
4246                         }
4247                 }
4248                 return true;
4249         }
4250
4251         /**
4252          * Filter an input field through a Unicode de-armoring process if it
4253          * came from an old browser with known broken Unicode editing issues.
4254          *
4255          * @param WebRequest $request
4256          * @param string $field
4257          * @return string
4258          */
4259         protected function safeUnicodeInput( $request, $field ) {
4260                 $text = rtrim( $request->getText( $field ) );
4261                 return $request->getBool( 'safemode' )
4262                         ? $this->unmakeSafe( $text )
4263                         : $text;
4264         }
4265
4266         /**
4267          * Filter an output field through a Unicode armoring process if it is
4268          * going to an old browser with known broken Unicode editing issues.
4269          *
4270          * @param string $text
4271          * @return string
4272          */
4273         protected function safeUnicodeOutput( $text ) {
4274                 return $this->checkUnicodeCompliantBrowser()
4275                         ? $text
4276                         : $this->makeSafe( $text );
4277         }
4278
4279         /**
4280          * A number of web browsers are known to corrupt non-ASCII characters
4281          * in a UTF-8 text editing environment. To protect against this,
4282          * detected browsers will be served an armored version of the text,
4283          * with non-ASCII chars converted to numeric HTML character references.
4284          *
4285          * Preexisting such character references will have a 0 added to them
4286          * to ensure that round-trips do not alter the original data.
4287          *
4288          * @param string $invalue
4289          * @return string
4290          */
4291         private function makeSafe( $invalue ) {
4292                 // Armor existing references for reversibility.
4293                 $invalue = strtr( $invalue, [ "&#x" => "&#x0" ] );
4294
4295                 $bytesleft = 0;
4296                 $result = "";
4297                 $working = 0;
4298                 $valueLength = strlen( $invalue );
4299                 for ( $i = 0; $i < $valueLength; $i++ ) {
4300                         $bytevalue = ord( $invalue[$i] );
4301                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
4302                                 $result .= chr( $bytevalue );
4303                                 $bytesleft = 0;
4304                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
4305                                 $working = $working << 6;
4306                                 $working += ( $bytevalue & 0x3F );
4307                                 $bytesleft--;
4308                                 if ( $bytesleft <= 0 ) {
4309                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
4310                                 }
4311                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
4312                                 $working = $bytevalue & 0x1F;
4313                                 $bytesleft = 1;
4314                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
4315                                 $working = $bytevalue & 0x0F;
4316                                 $bytesleft = 2;
4317                         } else { // 1111 0xxx
4318                                 $working = $bytevalue & 0x07;
4319                                 $bytesleft = 3;
4320                         }
4321                 }
4322                 return $result;
4323         }
4324
4325         /**
4326          * Reverse the previously applied transliteration of non-ASCII characters
4327          * back to UTF-8. Used to protect data from corruption by broken web browsers
4328          * as listed in $wgBrowserBlackList.
4329          *
4330          * @param string $invalue
4331          * @return string
4332          */
4333         private function unmakeSafe( $invalue ) {
4334                 $result = "";
4335                 $valueLength = strlen( $invalue );
4336                 for ( $i = 0; $i < $valueLength; $i++ ) {
4337                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
4338                                 $i += 3;
4339                                 $hexstring = "";
4340                                 do {
4341                                         $hexstring .= $invalue[$i];
4342                                         $i++;
4343                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
4344
4345                                 // Do some sanity checks. These aren't needed for reversibility,
4346                                 // but should help keep the breakage down if the editor
4347                                 // breaks one of the entities whilst editing.
4348                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) && ( strlen( $hexstring ) <= 6 ) ) {
4349                                         $codepoint = hexdec( $hexstring );
4350                                         $result .= UtfNormal\Utils::codepointToUtf8( $codepoint );
4351                                 } else {
4352                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
4353                                 }
4354                         } else {
4355                                 $result .= substr( $invalue, $i, 1 );
4356                         }
4357                 }
4358                 // reverse the transform that we made for reversibility reasons.
4359                 return strtr( $result, [ "&#x0" => "&#x" ] );
4360         }
4361
4362         protected function addEditNotices() {
4363                 global $wgOut;
4364
4365                 $editNotices = $this->mTitle->getEditNotices( $this->oldid );
4366                 if ( count( $editNotices ) ) {
4367                         $wgOut->addHTML( implode( "\n", $editNotices ) );
4368                 } else {
4369                         $msg = $this->context->msg( 'editnotice-notext' );
4370                         if ( !$msg->isDisabled() ) {
4371                                 $wgOut->addHTML(
4372                                         '<div class="mw-editnotice-notext">'
4373                                         . $msg->parseAsBlock()
4374                                         . '</div>'
4375                                 );
4376                         }
4377                 }
4378         }
4379
4380         protected function addTalkPageText() {
4381                 global $wgOut;
4382
4383                 if ( $this->mTitle->isTalkPage() ) {
4384                         $wgOut->addWikiMsg( 'talkpagetext' );
4385                 }
4386         }
4387
4388         /**
4389          * @since 1.29
4390          */
4391         protected function addLongPageWarningHeader() {
4392                 global $wgMaxArticleSize, $wgOut, $wgLang;
4393
4394                 if ( $this->contentLength === false ) {
4395                         $this->contentLength = strlen( $this->textbox1 );
4396                 }
4397
4398                 if ( $this->tooBig || $this->contentLength > $wgMaxArticleSize * 1024 ) {
4399                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
4400                                 [
4401                                         'longpageerror',
4402                                         $wgLang->formatNum( round( $this->contentLength / 1024, 3 ) ),
4403                                         $wgLang->formatNum( $wgMaxArticleSize )
4404                                 ]
4405                         );
4406                 } else {
4407                         if ( !$this->context->msg( 'longpage-hint' )->isDisabled() ) {
4408                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
4409                                         [
4410                                                 'longpage-hint',
4411                                                 $wgLang->formatSize( strlen( $this->textbox1 ) ),
4412                                                 strlen( $this->textbox1 )
4413                                         ]
4414                                 );
4415                         }
4416                 }
4417         }
4418
4419         /**
4420          * @since 1.29
4421          */
4422         protected function addPageProtectionWarningHeaders() {
4423                 global $wgOut;
4424
4425                 if ( $this->mTitle->isProtected( 'edit' ) &&
4426                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
4427                 ) {
4428                         # Is the title semi-protected?
4429                         if ( $this->mTitle->isSemiProtected() ) {
4430                                 $noticeMsg = 'semiprotectedpagewarning';
4431                         } else {
4432                                 # Then it must be protected based on static groups (regular)
4433                                 $noticeMsg = 'protectedpagewarning';
4434                         }
4435                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
4436                                 [ 'lim' => 1, 'msgKey' => [ $noticeMsg ] ] );
4437                 }
4438                 if ( $this->mTitle->isCascadeProtected() ) {
4439                         # Is this page under cascading protection from some source pages?
4440                         /** @var Title[] $cascadeSources */
4441                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
4442                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
4443                         $cascadeSourcesCount = count( $cascadeSources );
4444                         if ( $cascadeSourcesCount > 0 ) {
4445                                 # Explain, and list the titles responsible
4446                                 foreach ( $cascadeSources as $page ) {
4447                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
4448                                 }
4449                         }
4450                         $notice .= '</div>';
4451                         $wgOut->wrapWikiMsg( $notice, [ 'cascadeprotectedwarning', $cascadeSourcesCount ] );
4452                 }
4453                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
4454                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
4455                                 [ 'lim' => 1,
4456                                         'showIfEmpty' => false,
4457                                         'msgKey' => [ 'titleprotectedwarning' ],
4458                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ] );
4459                 }
4460         }
4461 }