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