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\Block\DatabaseBlock;
  24 use MediaWiki\EditPage\TextboxBuilder;
  25 use MediaWiki\EditPage\TextConflictHelper;
  26 use MediaWiki\Logger\LoggerFactory;
  27 use MediaWiki\MediaWikiServices;
  28 use MediaWiki\Storage\RevisionRecord;
  29 use Wikimedia\ScopedCallback;
  30
  31 /**
  32  * The edit page/HTML interface (split from Article)
  33  * The actual database and text munging is still in Article,
  34  * but it should get easier to call those from alternate
  35  * interfaces.
  36  *
  37  * EditPage cares about two distinct titles:
  38  * $this->mContextTitle is the page that forms submit to, links point to,
  39  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  40  * page in the database that is actually being edited. These are
  41  * usually the same, but they are now allowed to be different.
  42  *
  43  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  44  * headaches, which may be fatal.
  45  */
  46 class EditPage {
  47         /**
  48          * Used for Unicode support checks
  49          */
  50         const UNICODE_CHECK = 'ℳ𝒲♥𝓊𝓃𝒾𝒸ℴ𝒹ℯ';
  51
  52         /**
  53          * Status: Article successfully updated
  54          */
  55         const AS_SUCCESS_UPDATE = 200;
  56
  57         /**
  58          * Status: Article successfully created
  59          */
  60         const AS_SUCCESS_NEW_ARTICLE = 201;
  61
  62         /**
  63          * Status: Article update aborted by a hook function
  64          */
  65         const AS_HOOK_ERROR = 210;
  66
  67         /**
  68          * Status: A hook function returned an error
  69          */
  70         const AS_HOOK_ERROR_EXPECTED = 212;
  71
  72         /**
  73          * Status: User is blocked from editing this page
  74          */
  75         const AS_BLOCKED_PAGE_FOR_USER = 215;
  76
  77         /**
  78          * Status: Content too big (> $wgMaxArticleSize)
  79          */
  80         const AS_CONTENT_TOO_BIG = 216;
  81
  82         /**
  83          * Status: this anonymous user is not allowed to edit this page
  84          */
  85         const AS_READ_ONLY_PAGE_ANON = 218;
  86
  87         /**
  88          * Status: this logged in user is not allowed to edit this page
  89          */
  90         const AS_READ_ONLY_PAGE_LOGGED = 219;
  91
  92         /**
  93          * Status: wiki is in readonly mode (wfReadOnly() == true)
  94          */
  95         const AS_READ_ONLY_PAGE = 220;
  96
  97         /**
  98          * Status: rate limiter for action 'edit' was tripped
  99          */
 100         const AS_RATE_LIMITED = 221;
 101
 102         /**
 103          * Status: article was deleted while editing and param wpRecreate == false or form
 104          * was not posted
 105          */
 106         const AS_ARTICLE_WAS_DELETED = 222;
 107
 108         /**
 109          * Status: user tried to create this page, but is not allowed to do that
 110          * ( Title->userCan('create') == false )
 111          */
 112         const AS_NO_CREATE_PERMISSION = 223;
 113
 114         /**
 115          * Status: user tried to create a blank page and wpIgnoreBlankArticle == false
 116          */
 117         const AS_BLANK_ARTICLE = 224;
 118
 119         /**
 120          * Status: (non-resolvable) edit conflict
 121          */
 122         const AS_CONFLICT_DETECTED = 225;
 123
 124         /**
 125          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 126          * editing in his own userspace or talkspace and wpIgnoreBlankSummary == false
 127          */
 128         const AS_SUMMARY_NEEDED = 226;
 129
 130         /**
 131          * Status: user tried to create a new section without content
 132          */
 133         const AS_TEXTBOX_EMPTY = 228;
 134
 135         /**
 136          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 137          */
 138         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 139
 140         /**
 141          * Status: WikiPage::doEdit() was unsuccessful
 142          */
 143         const AS_END = 231;
 144
 145         /**
 146          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 147          */
 148         const AS_SPAM_ERROR = 232;
 149
 150         /**
 151          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 152          */
 153         const AS_IMAGE_REDIRECT_ANON = 233;
 154
 155         /**
 156          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 157          */
 158         const AS_IMAGE_REDIRECT_LOGGED = 234;
 159
 160         /**
 161          * Status: user tried to modify the content model, but is not allowed to do that
 162          * ( User::isAllowed('editcontentmodel') == false )
 163          */
 164         const AS_NO_CHANGE_CONTENT_MODEL = 235;
 165
 166         /**
 167          * Status: user tried to create self-redirect (redirect to the same article) and
 168          * wpIgnoreSelfRedirect == false
 169          */
 170         const AS_SELF_REDIRECT = 236;
 171
 172         /**
 173          * Status: an error relating to change tagging. Look at the message key for
 174          * more details
 175          */
 176         const AS_CHANGE_TAG_ERROR = 237;
 177
 178         /**
 179          * Status: can't parse content
 180          */
 181         const AS_PARSE_ERROR = 240;
 182
 183         /**
 184          * Status: when changing the content model is disallowed due to
 185          * $wgContentHandlerUseDB being false
 186          */
 187         const AS_CANNOT_USE_CUSTOM_MODEL = 241;
 188
 189         /**
 190          * Status: edit rejected because browser doesn't support Unicode.
 191          */
 192         const AS_UNICODE_NOT_SUPPORTED = 242;
 193
 194         /**
 195          * HTML id and name for the beginning of the edit form.
 196          */
 197         const EDITFORM_ID = 'editform';
 198
 199         /**
 200          * Prefix of key for cookie used to pass post-edit state.
 201          * The revision id edited is added after this
 202          */
 203         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 204
 205         /**
 206          * Duration of PostEdit cookie, in seconds.
 207          * The cookie will be removed instantly if the JavaScript runs.
 208          *
 209          * Otherwise, though, we don't want the cookies to accumulate.
 210          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible
 211          * limit of only 20 cookies per domain. This still applies at least to some
 212          * versions of IE without full updates:
 213          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 214          *
 215          * A value of 20 minutes should be enough to take into account slow loads and minor
 216          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 217          */
 218         const POST_EDIT_COOKIE_DURATION = 1200;
 219
 220         /**
 221          * @deprecated for public usage since 1.30 use EditPage::getArticle()
 222          * @var Article
 223          */
 224         public $mArticle;
 225         /** @var WikiPage */
 226         private $page;
 227
 228         /**
 229          * @deprecated for public usage since 1.30 use EditPage::getTitle()
 230          * @var Title
 231          */
 232         public $mTitle;
 233
 234         /** @var null|Title */
 235         private $mContextTitle = null;
 236
 237         /** @var string */
 238         public $action = 'submit';
 239
 240         /** @var bool Whether an edit conflict needs to be resolved. Detected based on whether
 241          * $editRevId is different than the latest revision. When a conflict has successfully
 242          * been resolved by a 3-way-merge, this field is set to false.
 243          */
 244         public $isConflict = false;
 245
 246         /** @var bool New page or new section */
 247         public $isNew = false;
 248
 249         /** @var bool */
 250         public $deletedSinceEdit;
 251
 252         /** @var string */
 253         public $formtype;
 254
 255         /** @var bool
 256          * True the first time the edit form is rendered, false after re-rendering
 257          * with diff, save prompts, etc.
 258          */
 259         public $firsttime;
 260
 261         /** @var bool|stdClass */
 262         public $lastDelete;
 263
 264         /** @var bool */
 265         public $mTokenOk = false;
 266
 267         /** @var bool */
 268         public $mTokenOkExceptSuffix = false;
 269
 270         /** @var bool */
 271         public $mTriedSave = false;
 272
 273         /** @var bool */
 274         public $incompleteForm = false;
 275
 276         /** @var bool */
 277         public $tooBig = false;
 278
 279         /** @var bool */
 280         public $missingComment = false;
 281
 282         /** @var bool */
 283         public $missingSummary = false;
 284
 285         /** @var bool */
 286         public $allowBlankSummary = false;
 287
 288         /** @var bool */
 289         protected $blankArticle = false;
 290
 291         /** @var bool */
 292         protected $allowBlankArticle = false;
 293
 294         /** @var bool */
 295         protected $selfRedirect = false;
 296
 297         /** @var bool */
 298         protected $allowSelfRedirect = false;
 299
 300         /** @var string */
 301         public $autoSumm = '';
 302
 303         /** @var string */
 304         public $hookError = '';
 305
 306         /** @var ParserOutput */
 307         public $mParserOutput;
 308
 309         /** @var bool Has a summary been preset using GET parameter &summary= ? */
 310         public $hasPresetSummary = false;
 311
 312         /** @var Revision|bool|null A revision object corresponding to $this->editRevId. */
 313         public $mBaseRevision = false;
 314
 315         /** @var bool */
 316         public $mShowSummaryField = true;
 317
 318         # Form values
 319
 320         /** @var bool */
 321         public $save = false;
 322
 323         /** @var bool */
 324         public $preview = false;
 325
 326         /** @var bool */
 327         public $diff = false;
 328
 329         /** @var bool */
 330         public $minoredit = false;
 331
 332         /** @var bool */
 333         public $watchthis = false;
 334
 335         /** @var bool */
 336         public $recreate = false;
 337
 338         /** @var string
 339          * Page content input field.
 340          */
 341         public $textbox1 = '';
 342
 343         /** @var string */
 344         public $textbox2 = '';
 345
 346         /** @var string */
 347         public $summary = '';
 348
 349         /** @var bool
 350          * If true, hide the summary field.
 351          */
 352         public $nosummary = false;
 353
 354         /** @var string
 355          * Timestamp of the latest revision of the page when editing was initiated
 356          * on the client.
 357          */
 358         public $edittime = '';
 359
 360         /** @var int Revision ID of the latest revision of the page when editing
 361          * was initiated on the client.  This is used to detect and resolve edit
 362          * conflicts.
 363          *
 364          * @note 0 if the page did not exist at that time.
 365          * @note When starting an edit from an old revision, this still records the current
 366          * revision at the time, not the one the edit is based on.
 367          *
 368          * @see $oldid
 369          * @see getBaseRevision()
 370          */
 371         private $editRevId = null;
 372
 373         /** @var string */
 374         public $section = '';
 375
 376         /** @var string */
 377         public $sectiontitle = '';
 378
 379         /** @var string
 380          * Timestamp from the first time the edit form was rendered.
 381          */
 382         public $starttime = '';
 383
 384         /** @var int Revision ID the edit is based on, or 0 if it's the current revision.
 385          * FIXME: This isn't used in conflict resolution--provide a better
 386          * justification or merge with parentRevId.
 387          * @see $editRevId
 388          */
 389         public $oldid = 0;
 390
 391         /** @var int Revision ID the edit is based on, adjusted when an edit conflict is resolved.
 392          * @see $editRevId
 393          * @see $oldid
 394          * @see getparentRevId()
 395          */
 396         public $parentRevId = 0;
 397
 398         /** @var string */
 399         public $editintro = '';
 400
 401         /** @var null */
 402         public $scrolltop = null;
 403
 404         /** @var bool */
 405         public $bot = true;
 406
 407         /** @var string */
 408         public $contentModel;
 409
 410         /** @var null|string */
 411         public $contentFormat = null;
 412
 413         /** @var null|array */
 414         private $changeTags = null;
 415
 416         # Placeholders for text injection by hooks (must be HTML)
 417         # extensions should take care to _append_ to the present value
 418
 419         /** @var string Before even the preview */
 420         public $editFormPageTop = '';
 421         public $editFormTextTop = '';
 422         public $editFormTextBeforeContent = '';
 423         public $editFormTextAfterWarn = '';
 424         public $editFormTextAfterTools = '';
 425         public $editFormTextBottom = '';
 426         public $editFormTextAfterContent = '';
 427         public $previewTextAfterContent = '';
 428         public $mPreloadContent = null;
 429
 430         /* $didSave should be set to true whenever an article was successfully altered. */
 431         public $didSave = false;
 432         public $undidRev = 0;
 433
 434         public $suppressIntro = false;
 435
 436         /** @var bool */
 437         protected $edit;
 438
 439         /** @var bool|int */
 440         protected $contentLength = false;
 441
 442         /**
 443          * @var bool Set in ApiEditPage, based on ContentHandler::allowsDirectApiEditing
 444          */
 445         private $enableApiEditOverride = false;
 446
 447         /**
 448          * @var IContextSource
 449          */
 450         protected $context;
 451
 452         /**
 453          * @var bool Whether an old revision is edited
 454          */
 455         private $isOldRev = false;
 456
 457         /**
 458          * @var string|null What the user submitted in the 'wpUnicodeCheck' field
 459          */
 460         private $unicodeCheck;
 461
 462         /**
 463          * Factory function to create an edit conflict helper
 464          *
 465          * @var callable
 466          */
 467         private $editConflictHelperFactory;
 468
 469         /**
 470          * @var TextConflictHelper|null
 471          */
 472         private $editConflictHelper;
 473
 474         /**
 475          * @param Article $article
 476          */
 477         public function __construct( Article $article ) {
 478                 $this->mArticle = $article;
 479                 $this->page = $article->getPage(); // model object
 480                 $this->mTitle = $article->getTitle();
 481
 482                 // Make sure the local context is in sync with other member variables.
 483                 // Particularly make sure everything is using the same WikiPage instance.
 484                 // This should probably be the case in Article as well, but it's
 485                 // particularly important for EditPage, to make use of the in-place caching
 486                 // facility in WikiPage::prepareContentForEdit.
 487                 $this->context = new DerivativeContext( $article->getContext() );
 488                 $this->context->setWikiPage( $this->page );
 489                 $this->context->setTitle( $this->mTitle );
 490
 491                 $this->contentModel = $this->mTitle->getContentModel();
 492
 493                 $handler = ContentHandler::getForModelID( $this->contentModel );
 494                 $this->contentFormat = $handler->getDefaultFormat();
 495                 $this->editConflictHelperFactory = [ $this, 'newTextConflictHelper' ];
 496         }
 497
 498         /**
 499          * @return Article
 500          */
 501         public function getArticle() {
 502                 return $this->mArticle;
 503         }
 504
 505         /**
 506          * @since 1.28
 507          * @return IContextSource
 508          */
 509         public function getContext() {
 510                 return $this->context;
 511         }
 512
 513         /**
 514          * @since 1.19
 515          * @return Title
 516          */
 517         public function getTitle() {
 518                 return $this->mTitle;
 519         }
 520
 521         /**
 522          * Set the context Title object
 523          *
 524          * @param Title|null $title Title object or null
 525          */
 526         public function setContextTitle( $title ) {
 527                 $this->mContextTitle = $title;
 528         }
 529
 530         /**
 531          * Get the context title object.
 532          *
 533          * If not set, $wgTitle will be returned, but this is deprecated. This will
 534          * throw an exception.
 535          *
 536          * @return Title
 537          */
 538         public function getContextTitle() {
 539                 if ( is_null( $this->mContextTitle ) ) {
 540                         wfDeprecated( __METHOD__ . ' called with no title set', '1.32' );
 541                         global $wgTitle;
 542                         return $wgTitle;
 543                 } else {
 544                         return $this->mContextTitle;
 545                 }
 546         }
 547
 548         /**
 549          * Returns if the given content model is editable.
 550          *
 551          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 552          * @return bool
 553          * @throws MWException If $modelId has no known handler
 554          */
 555         public function isSupportedContentModel( $modelId ) {
 556                 return $this->enableApiEditOverride === true ||
 557                         ContentHandler::getForModelID( $modelId )->supportsDirectEditing();
 558         }
 559
 560         /**
 561          * Allow editing of content that supports API direct editing, but not general
 562          * direct editing. Set to false by default.
 563          *
 564          * @param bool $enableOverride
 565          */
 566         public function setApiEditOverride( $enableOverride ) {
 567                 $this->enableApiEditOverride = $enableOverride;
 568         }
 569
 570         /**
 571          * This is the function that gets called for "action=edit". It
 572          * sets up various member variables, then passes execution to
 573          * another function, usually showEditForm()
 574          *
 575          * The edit form is self-submitting, so that when things like
 576          * preview and edit conflicts occur, we get the same form back
 577          * with the extra stuff added.  Only when the final submission
 578          * is made and all is well do we actually save and redirect to
 579          * the newly-edited page.
 580          */
 581         public function edit() {
 582                 // Allow extensions to modify/prevent this form or submission
 583                 if ( !Hooks::run( 'AlternateEdit', [ $this ] ) ) {
 584                         return;
 585                 }
 586
 587                 wfDebug( __METHOD__ . ": enter\n" );
 588
 589                 $request = $this->context->getRequest();
 590                 // If they used redlink=1 and the page exists, redirect to the main article
 591                 if ( $request->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 592                         $this->context->getOutput()->redirect( $this->mTitle->getFullURL() );
 593                         return;
 594                 }
 595
 596                 $this->importFormData( $request );
 597                 $this->firsttime = false;
 598
 599                 if ( wfReadOnly() && $this->save ) {
 600                         // Force preview
 601                         $this->save = false;
 602                         $this->preview = true;
 603                 }
 604
 605                 if ( $this->save ) {
 606                         $this->formtype = 'save';
 607                 } elseif ( $this->preview ) {
 608                         $this->formtype = 'preview';
 609                 } elseif ( $this->diff ) {
 610                         $this->formtype = 'diff';
 611                 } else { # First time through
 612                         $this->firsttime = true;
 613                         if ( $this->previewOnOpen() ) {
 614                                 $this->formtype = 'preview';
 615                         } else {
 616                                 $this->formtype = 'initial';
 617                         }
 618                 }
 619
 620                 $permErrors = $this->getEditPermissionErrors( $this->save ? 'secure' : 'full' );
 621                 if ( $permErrors ) {
 622                         wfDebug( __METHOD__ . ": User can't edit\n" );
 623
 624                         if ( $this->context->getUser()->getBlock() ) {
 625                                 // Track block with a cookie if it doesn't exist already
 626                                 MediaWikiServices::getInstance()->getBlockManager()
 627                                         ->trackBlockWithCookie( $this->context->getUser() );
 628
 629                                 // Auto-block user's IP if the account was "hard" blocked
 630                                 if ( !wfReadOnly() ) {
 631                                         DeferredUpdates::addCallableUpdate( function () {
 632                                                 $this->context->getUser()->spreadAnyEditBlock();
 633                                         } );
 634                                 }
 635                         }
 636                         $this->displayPermissionsError( $permErrors );
 637
 638                         return;
 639                 }
 640
 641                 $revision = $this->mArticle->getRevisionFetched();
 642                 // Disallow editing revisions with content models different from the current one
 643                 // Undo edits being an exception in order to allow reverting content model changes.
 644                 if ( $revision
 645                         && $revision->getContentModel() !== $this->contentModel
 646                 ) {
 647                         $prevRev = null;
 648                         if ( $this->undidRev ) {
 649                                 $undidRevObj = Revision::newFromId( $this->undidRev );
 650                                 $prevRev = $undidRevObj ? $undidRevObj->getPrevious() : null;
 651                         }
 652                         if ( !$this->undidRev
 653                                 || !$prevRev
 654                                 || $prevRev->getContentModel() !== $this->contentModel
 655                         ) {
 656                                 $this->displayViewSourcePage(
 657                                         $this->getContentObject(),
 658                                         $this->context->msg(
 659                                                 'contentmodelediterror',
 660                                                 $revision->getContentModel(),
 661                                                 $this->contentModel
 662                                         )->plain()
 663                                 );
 664                                 return;
 665                         }
 666                 }
 667
 668                 $this->isConflict = false;
 669
 670                 # Show applicable editing introductions
 671                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 672                         $this->showIntro();
 673                 }
 674
 675                 # Attempt submission here.  This will check for edit conflicts,
 676                 # and redundantly check for locked database, blocked IPs, etc.
 677                 # that edit() already checked just in case someone tries to sneak
 678                 # in the back door with a hand-edited submission URL.
 679
 680                 if ( $this->formtype == 'save' ) {
 681                         $resultDetails = null;
 682                         $status = $this->attemptSave( $resultDetails );
 683                         if ( !$this->handleStatus( $status, $resultDetails ) ) {
 684                                 return;
 685                         }
 686                 }
 687
 688                 # First time through: get contents, set time for conflict
 689                 # checking, etc.
 690                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 691                         if ( $this->initialiseForm() === false ) {
 692                                 return;
 693                         }
 694
 695                         if ( !$this->mTitle->getArticleID() ) {
 696                                 Hooks::run( 'EditFormPreloadText', [ &$this->textbox1, &$this->mTitle ] );
 697                         } else {
 698                                 Hooks::run( 'EditFormInitialText', [ $this ] );
 699                         }
 700
 701                 }
 702
 703                 $this->showEditForm();
 704         }
 705
 706         /**
 707          * @param string $rigor Same format as Title::getUserPermissionErrors()
 708          * @return array
 709          */
 710         protected function getEditPermissionErrors( $rigor = 'secure' ) {
 711                 $user = $this->context->getUser();
 712                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $user, $rigor );
 713                 # Can this title be created?
 714                 if ( !$this->mTitle->exists() ) {
 715                         $permErrors = array_merge(
 716                                 $permErrors,
 717                                 wfArrayDiff2(
 718                                         $this->mTitle->getUserPermissionsErrors( 'create', $user, $rigor ),
 719                                         $permErrors
 720                                 )
 721                         );
 722                 }
 723                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 724                 $remove = [];
 725                 foreach ( $permErrors as $error ) {
 726                         if ( ( $this->preview || $this->diff )
 727                                 && (
 728                                         $error[0] == 'blockedtext' ||
 729                                         $error[0] == 'autoblockedtext' ||
 730                                         $error[0] == 'systemblockedtext'
 731                                 )
 732                         ) {
 733                                 $remove[] = $error;
 734                         }
 735                 }
 736                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 737
 738                 return $permErrors;
 739         }
 740
 741         /**
 742          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 743          * but with the following differences:
 744          * - If redlink=1, the user will be redirected to the page
 745          * - If there is content to display or the error occurs while either saving,
 746          *   previewing or showing the difference, it will be a
 747          *   "View source for ..." page displaying the source code after the error message.
 748          *
 749          * @since 1.19
 750          * @param array $permErrors Array of permissions errors, as returned by
 751          *    Title::getUserPermissionsErrors().
 752          * @throws PermissionsError
 753          */
 754         protected function displayPermissionsError( array $permErrors ) {
 755                 $out = $this->context->getOutput();
 756                 if ( $this->context->getRequest()->getBool( 'redlink' ) ) {
 757                         // The edit page was reached via a red link.
 758                         // Redirect to the article page and let them click the edit tab if
 759                         // they really want a permission error.
 760                         $out->redirect( $this->mTitle->getFullURL() );
 761                         return;
 762                 }
 763
 764                 $content = $this->getContentObject();
 765
 766                 # Use the normal message if there's nothing to display
 767                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 768                         $action = $this->mTitle->exists() ? 'edit' :
 769                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 770                         throw new PermissionsError( $action, $permErrors );
 771                 }
 772
 773                 $this->displayViewSourcePage(
 774                         $content,
 775                         $out->formatPermissionsErrorMessage( $permErrors, 'edit' )
 776                 );
 777         }
 778
 779         /**
 780          * Display a read-only View Source page
 781          * @param Content $content
 782          * @param string $errorMessage additional wikitext error message to display
 783          */
 784         protected function displayViewSourcePage( Content $content, $errorMessage = '' ) {
 785                 $out = $this->context->getOutput();
 786                 Hooks::run( 'EditPage::showReadOnlyForm:initial', [ $this, &$out ] );
 787
 788                 $out->setRobotPolicy( 'noindex,nofollow' );
 789                 $out->setPageTitle( $this->context->msg(
 790                         'viewsource-title',
 791                         $this->getContextTitle()->getPrefixedText()
 792                 ) );
 793                 $out->addBacklinkSubtitle( $this->getContextTitle() );
 794                 $out->addHTML( $this->editFormPageTop );
 795                 $out->addHTML( $this->editFormTextTop );
 796
 797                 if ( $errorMessage !== '' ) {
 798                         $out->addWikiTextAsInterface( $errorMessage );
 799                         $out->addHTML( "<hr />\n" );
 800                 }
 801
 802                 # If the user made changes, preserve them when showing the markup
 803                 # (This happens when a user is blocked during edit, for instance)
 804                 if ( !$this->firsttime ) {
 805                         $text = $this->textbox1;
 806                         $out->addWikiMsg( 'viewyourtext' );
 807                 } else {
 808                         try {
 809                                 $text = $this->toEditText( $content );
 810                         } catch ( MWException $e ) {
 811                                 # Serialize using the default format if the content model is not supported
 812                                 # (e.g. for an old revision with a different model)
 813                                 $text = $content->serialize();
 814                         }
 815                         $out->addWikiMsg( 'viewsourcetext' );
 816                 }
 817
 818                 $out->addHTML( $this->editFormTextBeforeContent );
 819                 $this->showTextbox( $text, 'wpTextbox1', [ 'readonly' ] );
 820                 $out->addHTML( $this->editFormTextAfterContent );
 821
 822                 $out->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
 823
 824                 $out->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 825
 826                 $out->addHTML( $this->editFormTextBottom );
 827                 if ( $this->mTitle->exists() ) {
 828                         $out->returnToMain( null, $this->mTitle );
 829                 }
 830         }
 831
 832         /**
 833          * Should we show a preview when the edit form is first shown?
 834          *
 835          * @return bool
 836          */
 837         protected function previewOnOpen() {
 838                 $config = $this->context->getConfig();
 839                 $previewOnOpenNamespaces = $config->get( 'PreviewOnOpenNamespaces' );
 840                 $request = $this->context->getRequest();
 841                 if ( $config->get( 'RawHtml' ) ) {
 842                         // If raw HTML is enabled, disable preview on open
 843                         // since it has to be posted with a token for
 844                         // security reasons
 845                         return false;
 846                 }
 847                 if ( $request->getVal( 'preview' ) == 'yes' ) {
 848                         // Explicit override from request
 849                         return true;
 850                 } elseif ( $request->getVal( 'preview' ) == 'no' ) {
 851                         // Explicit override from request
 852                         return false;
 853                 } elseif ( $this->section == 'new' ) {
 854                         // Nothing *to* preview for new sections
 855                         return false;
 856                 } elseif ( ( $request->getCheck( 'preload' ) || $this->mTitle->exists() )
 857                         && $this->context->getUser()->getOption( 'previewonfirst' )
 858                 ) {
 859                         // Standard preference behavior
 860                         return true;
 861                 } elseif ( !$this->mTitle->exists()
 862                         && isset( $previewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 863                         && $previewOnOpenNamespaces[$this->mTitle->getNamespace()]
 864                 ) {
 865                         // Categories are special
 866                         return true;
 867                 } else {
 868                         return false;
 869                 }
 870         }
 871
 872         /**
 873          * Checks whether the user entered a skin name in uppercase,
 874          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 875          *
 876          * @return bool
 877          */
 878         protected function isWrongCaseUserConfigPage() {
 879                 if ( $this->mTitle->isUserConfigPage() ) {
 880                         $name = $this->mTitle->getSkinFromConfigSubpage();
 881                         $skins = array_merge(
 882                                 array_keys( Skin::getSkinNames() ),
 883                                 [ 'common' ]
 884                         );
 885                         return !in_array( $name, $skins )
 886                                 && in_array( strtolower( $name ), $skins );
 887                 } else {
 888                         return false;
 889                 }
 890         }
 891
 892         /**
 893          * Returns whether section editing is supported for the current page.
 894          * Subclasses may override this to replace the default behavior, which is
 895          * to check ContentHandler::supportsSections.
 896          *
 897          * @return bool True if this edit page supports sections, false otherwise.
 898          */
 899         protected function isSectionEditSupported() {
 900                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 901                 return $contentHandler->supportsSections();
 902         }
 903
 904         /**
 905          * This function collects the form data and uses it to populate various member variables.
 906          * @param WebRequest &$request
 907          * @throws ErrorPageError
 908          */
 909         public function importFormData( &$request ) {
 910                 # Section edit can come from either the form or a link
 911                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 912
 913                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 914                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 915                 }
 916
 917                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 918
 919                 if ( $request->wasPosted() ) {
 920                         # These fields need to be checked for encoding.
 921                         # Also remove trailing whitespace, but don't remove _initial_
 922                         # whitespace from the text boxes. This may be significant formatting.
 923                         $this->textbox1 = rtrim( $request->getText( 'wpTextbox1' ) );
 924                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 925                                 // Skip this if wpTextbox2 has input, it indicates that we came
 926                                 // from a conflict page with raw page text, not a custom form
 927                                 // modified by subclasses
 928                                 $textbox1 = $this->importContentFormData( $request );
 929                                 if ( $textbox1 !== null ) {
 930                                         $this->textbox1 = $textbox1;
 931                                 }
 932                         }
 933
 934                         $this->unicodeCheck = $request->getText( 'wpUnicodeCheck' );
 935
 936                         $this->summary = $request->getText( 'wpSummary' );
 937
 938                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 939                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 940                         # section titles.
 941                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 942
 943                         # Treat sectiontitle the same way as summary.
 944                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 945                         # currently doing double duty as both edit summary and section title. Right now this
 946                         # is just to allow API edits to work around this limitation, but this should be
 947                         # incorporated into the actual edit form when EditPage is rewritten (T20654, T28312).
 948                         $this->sectiontitle = $request->getText( 'wpSectionTitle' );
 949                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 950
 951                         $this->edittime = $request->getVal( 'wpEdittime' );
 952                         $this->editRevId = $request->getIntOrNull( 'editRevId' );
 953                         $this->starttime = $request->getVal( 'wpStarttime' );
 954
 955                         $undidRev = $request->getInt( 'wpUndidRevision' );
 956                         if ( $undidRev ) {
 957                                 $this->undidRev = $undidRev;
 958                         }
 959
 960                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 961
 962                         if ( $this->textbox1 === '' && !$request->getCheck( 'wpTextbox1' ) ) {
 963                                 // wpTextbox1 field is missing, possibly due to being "too big"
 964                                 // according to some filter rules such as Suhosin's setting for
 965                                 // suhosin.request.max_value_length (d'oh)
 966                                 $this->incompleteForm = true;
 967                         } else {
 968                                 // If we receive the last parameter of the request, we can fairly
 969                                 // claim the POST request has not been truncated.
 970                                 $this->incompleteForm = !$request->getVal( 'wpUltimateParam' );
 971                         }
 972                         if ( $this->incompleteForm ) {
 973                                 # If the form is incomplete, force to preview.
 974                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 975                                 wfDebug( "POST DATA: " . var_export( $request->getPostValues(), true ) . "\n" );
 976                                 $this->preview = true;
 977                         } else {
 978                                 $this->preview = $request->getCheck( 'wpPreview' );
 979                                 $this->diff = $request->getCheck( 'wpDiff' );
 980
 981                                 // Remember whether a save was requested, so we can indicate
 982                                 // if we forced preview due to session failure.
 983                                 $this->mTriedSave = !$this->preview;
 984
 985                                 if ( $this->tokenOk( $request ) ) {
 986                                         # Some browsers will not report any submit button
 987                                         # if the user hits enter in the comment box.
 988                                         # The unmarked state will be assumed to be a save,
 989                                         # if the form seems otherwise complete.
 990                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 991                                 } elseif ( $this->diff ) {
 992                                         # Failed token check, but only requested "Show Changes".
 993                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 994                                 } else {
 995                                         # Page might be a hack attempt posted from
 996                                         # an external site. Preview instead of saving.
 997                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 998                                         $this->preview = true;
 999                                 }
1000                         }
1001                         $this->save = !$this->preview && !$this->diff;
1002                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
1003                                 $this->edittime = null;
1004                         }
1005
1006                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
1007                                 $this->starttime = null;
1008                         }
1009
1010                         $this->recreate = $request->getCheck( 'wpRecreate' );
1011
1012                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
1013                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
1014
1015                         $user = $this->context->getUser();
1016                         # Don't force edit summaries when a user is editing their own user or talk page
1017                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
1018                                 && $this->mTitle->getText() == $user->getName()
1019                         ) {
1020                                 $this->allowBlankSummary = true;
1021                         } else {
1022                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
1023                                         || !$user->getOption( 'forceeditsummary' );
1024                         }
1025
1026                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
1027
1028                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
1029                         $this->allowSelfRedirect = $request->getBool( 'wpIgnoreSelfRedirect' );
1030
1031                         $changeTags = $request->getVal( 'wpChangeTags' );
1032                         if ( is_null( $changeTags ) || $changeTags === '' ) {
1033                                 $this->changeTags = [];
1034                         } else {
1035                                 $this->changeTags = array_filter( array_map( 'trim', explode( ',',
1036                                         $changeTags ) ) );
1037                         }
1038                 } else {
1039                         # Not a posted form? Start with nothing.
1040                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
1041                         $this->textbox1 = '';
1042                         $this->summary = '';
1043                         $this->sectiontitle = '';
1044                         $this->edittime = '';
1045                         $this->editRevId = null;
1046                         $this->starttime = wfTimestampNow();
1047                         $this->edit = false;
1048                         $this->preview = false;
1049                         $this->save = false;
1050                         $this->diff = false;
1051                         $this->minoredit = false;
1052                         // Watch may be overridden by request parameters
1053                         $this->watchthis = $request->getBool( 'watchthis', false );
1054                         $this->recreate = false;
1055
1056                         // When creating a new section, we can preload a section title by passing it as the
1057                         // preloadtitle parameter in the URL (T15100)
1058                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
1059                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
1060                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
1061                                 $this->summary = $request->getVal( 'preloadtitle' );
1062                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) !== '' ) {
1063                                 $this->summary = $request->getText( 'summary' );
1064                                 if ( $this->summary !== '' ) {
1065                                         $this->hasPresetSummary = true;
1066                                 }
1067                         }
1068
1069                         if ( $request->getVal( 'minor' ) ) {
1070                                 $this->minoredit = true;
1071                         }
1072                 }
1073
1074                 $this->oldid = $request->getInt( 'oldid' );
1075                 $this->parentRevId = $request->getInt( 'parentRevId' );
1076
1077                 $this->bot = $request->getBool( 'bot', true );
1078                 $this->nosummary = $request->getBool( 'nosummary' );
1079
1080                 // May be overridden by revision.
1081                 $this->contentModel = $request->getText( 'model', $this->contentModel );
1082                 // May be overridden by revision.
1083                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
1084
1085                 try {
1086                         $handler = ContentHandler::getForModelID( $this->contentModel );
1087                 } catch ( MWUnknownContentModelException $e ) {
1088                         throw new ErrorPageError(
1089                                 'editpage-invalidcontentmodel-title',
1090                                 'editpage-invalidcontentmodel-text',
1091                                 [ wfEscapeWikiText( $this->contentModel ) ]
1092                         );
1093                 }
1094
1095                 if ( !$handler->isSupportedFormat( $this->contentFormat ) ) {
1096                         throw new ErrorPageError(
1097                                 'editpage-notsupportedcontentformat-title',
1098                                 'editpage-notsupportedcontentformat-text',
1099                                 [
1100                                         wfEscapeWikiText( $this->contentFormat ),
1101                                         wfEscapeWikiText( ContentHandler::getLocalizedName( $this->contentModel ) )
1102                                 ]
1103                         );
1104                 }
1105
1106                 /**
1107                  * @todo Check if the desired model is allowed in this namespace, and if
1108                  *   a transition from the page's current model to the new model is
1109                  *   allowed.
1110                  */
1111
1112                 $this->editintro = $request->getText( 'editintro',
1113                         // Custom edit intro for new sections
1114                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
1115
1116                 // Allow extensions to modify form data
1117                 Hooks::run( 'EditPage::importFormData', [ $this, $request ] );
1118         }
1119
1120         /**
1121          * Subpage overridable method for extracting the page content data from the
1122          * posted form to be placed in $this->textbox1, if using customized input
1123          * this method should be overridden and return the page text that will be used
1124          * for saving, preview parsing and so on...
1125          *
1126          * @param WebRequest &$request
1127          * @return string|null
1128          */
1129         protected function importContentFormData( &$request ) {
1130                 return null; // Don't do anything, EditPage already extracted wpTextbox1
1131         }
1132
1133         /**
1134          * Initialise form fields in the object
1135          * Called on the first invocation, e.g. when a user clicks an edit link
1136          * @return bool If the requested section is valid
1137          */
1138         public function initialiseForm() {
1139                 $this->edittime = $this->page->getTimestamp();
1140                 $this->editRevId = $this->page->getLatest();
1141
1142                 $content = $this->getContentObject( false ); # TODO: track content object?!
1143                 if ( $content === false ) {
1144                         $out = $this->context->getOutput();
1145                         if ( $out->getRedirect() === '' ) { // mcrundo hack redirects, don't override it
1146                                 $this->noSuchSectionPage();
1147                         }
1148                         return false;
1149                 }
1150
1151                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
1152                         $modelMsg = $this->getContext()->msg( 'content-model-' . $content->getModel() );
1153                         $modelName = $modelMsg->exists() ? $modelMsg->text() : $content->getModel();
1154
1155                         $out = $this->context->getOutput();
1156                         $out->showErrorPage(
1157                                 'modeleditnotsupported-title',
1158                                 'modeleditnotsupported-text',
1159                                 $modelName
1160                         );
1161                         return false;
1162                 }
1163
1164                 $this->textbox1 = $this->toEditText( $content );
1165
1166                 $user = $this->context->getUser();
1167                 // activate checkboxes if user wants them to be always active
1168                 # Sort out the "watch" checkbox
1169                 if ( $user->getOption( 'watchdefault' ) ) {
1170                         # Watch all edits
1171                         $this->watchthis = true;
1172                 } elseif ( $user->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1173                         # Watch creations
1174                         $this->watchthis = true;
1175                 } elseif ( $user->isWatched( $this->mTitle ) ) {
1176                         # Already watched
1177                         $this->watchthis = true;
1178                 }
1179                 if ( $user->getOption( 'minordefault' ) && !$this->isNew ) {
1180                         $this->minoredit = true;
1181                 }
1182                 if ( $this->textbox1 === false ) {
1183                         return false;
1184                 }
1185                 return true;
1186         }
1187
1188         /**
1189          * @param Content|null $def_content The default value to return
1190          *
1191          * @return Content|null Content on success, $def_content for invalid sections
1192          *
1193          * @since 1.21
1194          */
1195         protected function getContentObject( $def_content = null ) {
1196                 $content = false;
1197
1198                 $user = $this->context->getUser();
1199                 $request = $this->context->getRequest();
1200                 // For message page not locally set, use the i18n message.
1201                 // For other non-existent articles, use preload text if any.
1202                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
1203                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
1204                                 # If this is a system message, get the default text.
1205                                 $msg = $this->mTitle->getDefaultMessageText();
1206
1207                                 $content = $this->toEditContent( $msg );
1208                         }
1209                         if ( $content === false ) {
1210                                 # If requested, preload some text.
1211                                 $preload = $request->getVal( 'preload',
1212                                         // Custom preload text for new sections
1213                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1214                                 $params = $request->getArray( 'preloadparams', [] );
1215
1216                                 $content = $this->getPreloadedContent( $preload, $params );
1217                         }
1218                 // For existing pages, get text based on "undo" or section parameters.
1219                 } elseif ( $this->section != '' ) {
1220                         // Get section edit text (returns $def_text for invalid sections)
1221                         $orig = $this->getOriginalContent( $user );
1222                         $content = $orig ? $orig->getSection( $this->section ) : null;
1223
1224                         if ( !$content ) {
1225                                 $content = $def_content;
1226                         }
1227                 } else {
1228                         $undoafter = $request->getInt( 'undoafter' );
1229                         $undo = $request->getInt( 'undo' );
1230
1231                         if ( $undo > 0 && $undoafter > 0 ) {
1232                                 $undorev = Revision::newFromId( $undo );
1233                                 $oldrev = Revision::newFromId( $undoafter );
1234                                 $undoMsg = null;
1235
1236                                 # Sanity check, make sure it's the right page,
1237                                 # the revisions exist and they were not deleted.
1238                                 # Otherwise, $content will be left as-is.
1239                                 if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1240                                         !$undorev->isDeleted( RevisionRecord::DELETED_TEXT ) &&
1241                                         !$oldrev->isDeleted( RevisionRecord::DELETED_TEXT )
1242                                 ) {
1243                                         if ( WikiPage::hasDifferencesOutsideMainSlot( $undorev, $oldrev )
1244                                                 || !$this->isSupportedContentModel( $oldrev->getContentModel() )
1245                                         ) {
1246                                                 // Hack for undo while EditPage can't handle multi-slot editing
1247                                                 $this->context->getOutput()->redirect( $this->mTitle->getFullURL( [
1248                                                         'action' => 'mcrundo',
1249                                                         'undo' => $undo,
1250                                                         'undoafter' => $undoafter,
1251                                                 ] ) );
1252                                                 return false;
1253                                         } else {
1254                                                 $content = $this->page->getUndoContent( $undorev, $oldrev );
1255
1256                                                 if ( $content === false ) {
1257                                                         # Warn the user that something went wrong
1258                                                         $undoMsg = 'failure';
1259                                                 }
1260                                         }
1261
1262                                         if ( $undoMsg === null ) {
1263                                                 $oldContent = $this->page->getContent( RevisionRecord::RAW );
1264                                                 $popts = ParserOptions::newFromUserAndLang(
1265                                                         $user, MediaWikiServices::getInstance()->getContentLanguage() );
1266                                                 $newContent = $content->preSaveTransform( $this->mTitle, $user, $popts );
1267                                                 if ( $newContent->getModel() !== $oldContent->getModel() ) {
1268                                                         // The undo may change content
1269                                                         // model if its reverting the top
1270                                                         // edit. This can result in
1271                                                         // mismatched content model/format.
1272                                                         $this->contentModel = $newContent->getModel();
1273                                                         $this->contentFormat = $oldrev->getContentFormat();
1274                                                 }
1275
1276                                                 if ( $newContent->equals( $oldContent ) ) {
1277                                                         # Tell the user that the undo results in no change,
1278                                                         # i.e. the revisions were already undone.
1279                                                         $undoMsg = 'nochange';
1280                                                         $content = false;
1281                                                 } else {
1282                                                         # Inform the user of our success and set an automatic edit summary
1283                                                         $undoMsg = 'success';
1284
1285                                                         # If we just undid one rev, use an autosummary
1286                                                         $firstrev = $oldrev->getNext();
1287                                                         if ( $firstrev && $firstrev->getId() == $undo ) {
1288                                                                 $userText = $undorev->getUserText();
1289                                                                 if ( $userText === '' ) {
1290                                                                         $undoSummary = $this->context->msg(
1291                                                                                 'undo-summary-username-hidden',
1292                                                                                 $undo
1293                                                                         )->inContentLanguage()->text();
1294                                                                 } else {
1295                                                                         $undoSummary = $this->context->msg(
1296                                                                                 'undo-summary',
1297                                                                                 $undo,
1298                                                                                 $userText
1299                                                                         )->inContentLanguage()->text();
1300                                                                 }
1301                                                                 if ( $this->summary === '' ) {
1302                                                                         $this->summary = $undoSummary;
1303                                                                 } else {
1304                                                                         $this->summary = $undoSummary . $this->context->msg( 'colon-separator' )
1305                                                                                 ->inContentLanguage()->text() . $this->summary;
1306                                                                 }
1307                                                                 $this->undidRev = $undo;
1308                                                         }
1309                                                         $this->formtype = 'diff';
1310                                                 }
1311                                         }
1312                                 } else {
1313                                         // Failed basic sanity checks.
1314                                         // Older revisions may have been removed since the link
1315                                         // was created, or we may simply have got bogus input.
1316                                         $undoMsg = 'norev';
1317                                 }
1318
1319                                 $out = $this->context->getOutput();
1320                                 // Messages: undo-success, undo-failure, undo-main-slot-only, undo-norev,
1321                                 // undo-nochange.
1322                                 $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1323                                 $this->editFormPageTop .= Html::rawElement(
1324                                         'div', [ 'class' => $class ],
1325                                         $out->parseAsInterface(
1326                                                 $this->context->msg( 'undo-' . $undoMsg )->plain()
1327                                         )
1328                                 );
1329                         }
1330
1331                         if ( $content === false ) {
1332                                 // Hack for restoring old revisions while EditPage
1333                                 // can't handle multi-slot editing.
1334
1335                                 $curRevision = $this->page->getRevision();
1336                                 $oldRevision = $this->mArticle->getRevisionFetched();
1337
1338                                 if ( $curRevision
1339                                         && $oldRevision
1340                                         && $curRevision->getId() !== $oldRevision->getId()
1341                                         && ( WikiPage::hasDifferencesOutsideMainSlot( $oldRevision, $curRevision )
1342                                                 || !$this->isSupportedContentModel( $oldRevision->getContentModel() ) )
1343                                 ) {
1344                                         $this->context->getOutput()->redirect(
1345                                                 $this->mTitle->getFullURL(
1346                                                         [
1347                                                                 'action' => 'mcrrestore',
1348                                                                 'restore' => $oldRevision->getId(),
1349                                                         ]
1350                                                 )
1351                                         );
1352
1353                                         return false;
1354                                 }
1355                         }
1356
1357                         if ( $content === false ) {
1358                                 $content = $this->getOriginalContent( $user );
1359                         }
1360                 }
1361
1362                 return $content;
1363         }
1364
1365         /**
1366          * Get the content of the wanted revision, without section extraction.
1367          *
1368          * The result of this function can be used to compare user's input with
1369          * section replaced in its context (using WikiPage::replaceSectionAtRev())
1370          * to the original text of the edit.
1371          *
1372          * This differs from Article::getContent() that when a missing revision is
1373          * encountered the result will be null and not the
1374          * 'missing-revision' message.
1375          *
1376          * @since 1.19
1377          * @param User $user The user to get the revision for
1378          * @return Content|null
1379          */
1380         private function getOriginalContent( User $user ) {
1381                 if ( $this->section == 'new' ) {
1382                         return $this->getCurrentContent();
1383                 }
1384                 $revision = $this->mArticle->getRevisionFetched();
1385                 if ( $revision === null ) {
1386                         $handler = ContentHandler::getForModelID( $this->contentModel );
1387                         return $handler->makeEmptyContent();
1388                 }
1389                 $content = $revision->getContent( RevisionRecord::FOR_THIS_USER, $user );
1390                 return $content;
1391         }
1392
1393         /**
1394          * Get the edit's parent revision ID
1395          *
1396          * The "parent" revision is the ancestor that should be recorded in this
1397          * page's revision history.  It is either the revision ID of the in-memory
1398          * article content, or in the case of a 3-way merge in order to rebase
1399          * across a recoverable edit conflict, the ID of the newer revision to
1400          * which we have rebased this page.
1401          *
1402          * @since 1.27
1403          * @return int Revision ID
1404          */
1405         public function getParentRevId() {
1406                 if ( $this->parentRevId ) {
1407                         return $this->parentRevId;
1408                 } else {
1409                         return $this->mArticle->getRevIdFetched();
1410                 }
1411         }
1412
1413         /**
1414          * Get the current content of the page. This is basically similar to
1415          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1416          * content object is returned instead of null.
1417          *
1418          * @since 1.21
1419          * @return Content
1420          */
1421         protected function getCurrentContent() {
1422                 $rev = $this->page->getRevision();
1423                 $content = $rev ? $rev->getContent( RevisionRecord::RAW ) : null;
1424
1425                 if ( $content === false || $content === null ) {
1426                         $handler = ContentHandler::getForModelID( $this->contentModel );
1427                         return $handler->makeEmptyContent();
1428                 } elseif ( !$this->undidRev ) {
1429                         // Content models should always be the same since we error
1430                         // out if they are different before this point (in ->edit()).
1431                         // The exception being, during an undo, the current revision might
1432                         // differ from the prior revision.
1433                         $logger = LoggerFactory::getInstance( 'editpage' );
1434                         if ( $this->contentModel !== $rev->getContentModel() ) {
1435                                 $logger->warning( "Overriding content model from current edit {prev} to {new}", [
1436                                         'prev' => $this->contentModel,
1437                                         'new' => $rev->getContentModel(),
1438                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1439                                         'method' => __METHOD__
1440                                 ] );
1441                                 $this->contentModel = $rev->getContentModel();
1442                         }
1443
1444                         // Given that the content models should match, the current selected
1445                         // format should be supported.
1446                         if ( !$content->isSupportedFormat( $this->contentFormat ) ) {
1447                                 $logger->warning( "Current revision content format unsupported. Overriding {prev} to {new}", [
1448
1449                                         'prev' => $this->contentFormat,
1450                                         'new' => $rev->getContentFormat(),
1451                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1452                                         'method' => __METHOD__
1453                                 ] );
1454                                 $this->contentFormat = $rev->getContentFormat();
1455                         }
1456                 }
1457                 return $content;
1458         }
1459
1460         /**
1461          * Use this method before edit() to preload some content into the edit box
1462          *
1463          * @param Content $content
1464          *
1465          * @since 1.21
1466          */
1467         public function setPreloadedContent( Content $content ) {
1468                 $this->mPreloadContent = $content;
1469         }
1470
1471         /**
1472          * Get the contents to be preloaded into the box, either set by
1473          * an earlier setPreloadText() or by loading the given page.
1474          *
1475          * @param string $preload Representing the title to preload from.
1476          * @param array $params Parameters to use (interface-message style) in the preloaded text
1477          *
1478          * @return Content
1479          *
1480          * @since 1.21
1481          */
1482         protected function getPreloadedContent( $preload, $params = [] ) {
1483                 if ( !empty( $this->mPreloadContent ) ) {
1484                         return $this->mPreloadContent;
1485                 }
1486
1487                 $handler = ContentHandler::getForModelID( $this->contentModel );
1488
1489                 if ( $preload === '' ) {
1490                         return $handler->makeEmptyContent();
1491                 }
1492
1493                 $user = $this->context->getUser();
1494                 $title = Title::newFromText( $preload );
1495
1496                 # Check for existence to avoid getting MediaWiki:Noarticletext
1497                 if ( !$this->isPageExistingAndViewable( $title, $user ) ) {
1498                         // TODO: somehow show a warning to the user!
1499                         return $handler->makeEmptyContent();
1500                 }
1501
1502                 $page = WikiPage::factory( $title );
1503                 if ( $page->isRedirect() ) {
1504                         $title = $page->getRedirectTarget();
1505                         # Same as before
1506                         if ( !$this->isPageExistingAndViewable( $title, $user ) ) {
1507                                 // TODO: somehow show a warning to the user!
1508                                 return $handler->makeEmptyContent();
1509                         }
1510                         $page = WikiPage::factory( $title );
1511                 }
1512
1513                 $parserOptions = ParserOptions::newFromUser( $user );
1514                 $content = $page->getContent( RevisionRecord::RAW );
1515
1516                 if ( !$content ) {
1517                         // TODO: somehow show a warning to the user!
1518                         return $handler->makeEmptyContent();
1519                 }
1520
1521                 if ( $content->getModel() !== $handler->getModelID() ) {
1522                         $converted = $content->convert( $handler->getModelID() );
1523
1524                         if ( !$converted ) {
1525                                 // TODO: somehow show a warning to the user!
1526                                 wfDebug( "Attempt to preload incompatible content: " .
1527                                         "can't convert " . $content->getModel() .
1528                                         " to " . $handler->getModelID() );
1529
1530                                 return $handler->makeEmptyContent();
1531                         }
1532
1533                         $content = $converted;
1534                 }
1535
1536                 return $content->preloadTransform( $title, $parserOptions, $params );
1537         }
1538
1539         /**
1540          * Verify if a given title exists and the given user is allowed to view it
1541          *
1542          * @see EditPage::getPreloadedContent()
1543          * @param Title|null $title
1544          * @param User $user
1545          * @return bool
1546          * @throws Exception
1547          */
1548         private function isPageExistingAndViewable( $title, User $user ) {
1549                 $permissionManager = MediaWikiServices::getInstance()->getPermissionManager();
1550
1551                 return $title && $title->exists() && $permissionManager->userCan( 'read', $user, $title );
1552         }
1553
1554         /**
1555          * Make sure the form isn't faking a user's credentials.
1556          *
1557          * @param WebRequest &$request
1558          * @return bool
1559          * @private
1560          */
1561         public function tokenOk( &$request ) {
1562                 $token = $request->getVal( 'wpEditToken' );
1563                 $user = $this->context->getUser();
1564                 $this->mTokenOk = $user->matchEditToken( $token );
1565                 $this->mTokenOkExceptSuffix = $user->matchEditTokenNoSuffix( $token );
1566                 return $this->mTokenOk;
1567         }
1568
1569         /**
1570          * Sets post-edit cookie indicating the user just saved a particular revision.
1571          *
1572          * This uses a temporary cookie for each revision ID so separate saves will never
1573          * interfere with each other.
1574          *
1575          * Article::view deletes the cookie on server-side after the redirect and
1576          * converts the value to the global JavaScript variable wgPostEdit.
1577          *
1578          * If the variable were set on the server, it would be cached, which is unwanted
1579          * since the post-edit state should only apply to the load right after the save.
1580          *
1581          * @param int $statusValue The status value (to check for new article status)
1582          */
1583         protected function setPostEditCookie( $statusValue ) {
1584                 $revisionId = $this->page->getLatest();
1585                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1586
1587                 $val = 'saved';
1588                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1589                         $val = 'created';
1590                 } elseif ( $this->oldid ) {
1591                         $val = 'restored';
1592                 }
1593
1594                 $response = $this->context->getRequest()->response();
1595                 $response->setCookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION );
1596         }
1597
1598         /**
1599          * Attempt submission
1600          * @param array|bool &$resultDetails See docs for $result in internalAttemptSave
1601          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1602          * @return Status The resulting status object.
1603          */
1604         public function attemptSave( &$resultDetails = false ) {
1605                 // TODO: MCR: treat $this->minoredit like $this->bot and check isAllowed( 'minoredit' )!
1606                 // Also, add $this->autopatrol like $this->bot and check isAllowed( 'autopatrol' )!
1607                 // This is needed since PageUpdater no longer checks these rights!
1608
1609                 // Allow bots to exempt some edits from bot flagging
1610                 $permissionManager = MediaWikiServices::getInstance()->getPermissionManager();
1611                 $bot = $permissionManager->userHasRight( $this->context->getUser(), 'bot' ) && $this->bot;
1612                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1613
1614                 Hooks::run( 'EditPage::attemptSave:after', [ $this, $status, $resultDetails ] );
1615
1616                 return $status;
1617         }
1618
1619         /**
1620          * Log when a page was successfully saved after the edit conflict view
1621          */
1622         private function incrementResolvedConflicts() {
1623                 if ( $this->context->getRequest()->getText( 'mode' ) !== 'conflict' ) {
1624                         return;
1625                 }
1626
1627                 $this->getEditConflictHelper()->incrementResolvedStats();
1628         }
1629
1630         /**
1631          * Handle status, such as after attempt save
1632          *
1633          * @param Status $status
1634          * @param array|bool $resultDetails
1635          *
1636          * @throws ErrorPageError
1637          * @return bool False, if output is done, true if rest of the form should be displayed
1638          */
1639         private function handleStatus( Status $status, $resultDetails ) {
1640                 /**
1641                  * @todo FIXME: once the interface for internalAttemptSave() is made
1642                  *   nicer, this should use the message in $status
1643                  */
1644                 if ( $status->value == self::AS_SUCCESS_UPDATE
1645                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1646                 ) {
1647                         $this->incrementResolvedConflicts();
1648
1649                         $this->didSave = true;
1650                         if ( !$resultDetails['nullEdit'] ) {
1651                                 $this->setPostEditCookie( $status->value );
1652                         }
1653                 }
1654
1655                 $out = $this->context->getOutput();
1656
1657                 // "wpExtraQueryRedirect" is a hidden input to modify
1658                 // after save URL and is not used by actual edit form
1659                 $request = $this->context->getRequest();
1660                 $extraQueryRedirect = $request->getVal( 'wpExtraQueryRedirect' );
1661
1662                 switch ( $status->value ) {
1663                         case self::AS_HOOK_ERROR_EXPECTED:
1664                         case self::AS_CONTENT_TOO_BIG:
1665                         case self::AS_ARTICLE_WAS_DELETED:
1666                         case self::AS_CONFLICT_DETECTED:
1667                         case self::AS_SUMMARY_NEEDED:
1668                         case self::AS_TEXTBOX_EMPTY:
1669                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1670                         case self::AS_END:
1671                         case self::AS_BLANK_ARTICLE:
1672                         case self::AS_SELF_REDIRECT:
1673                                 return true;
1674
1675                         case self::AS_HOOK_ERROR:
1676                                 return false;
1677
1678                         case self::AS_CANNOT_USE_CUSTOM_MODEL:
1679                         case self::AS_PARSE_ERROR:
1680                         case self::AS_UNICODE_NOT_SUPPORTED:
1681                                 $out->wrapWikiTextAsInterface( 'error', $status->getWikiText() );
1682                                 return true;
1683
1684                         case self::AS_SUCCESS_NEW_ARTICLE:
1685                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1686                                 if ( $extraQueryRedirect ) {
1687                                         if ( $query !== '' ) {
1688                                                 $query .= '&';
1689                                         }
1690                                         $query .= $extraQueryRedirect;
1691                                 }
1692                                 $anchor = $resultDetails['sectionanchor'] ?? '';
1693                                 $out->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1694                                 return false;
1695
1696                         case self::AS_SUCCESS_UPDATE:
1697                                 $extraQuery = '';
1698                                 $sectionanchor = $resultDetails['sectionanchor'];
1699
1700                                 // Give extensions a chance to modify URL query on update
1701                                 Hooks::run(
1702                                         'ArticleUpdateBeforeRedirect',
1703                                         [ $this->mArticle, &$sectionanchor, &$extraQuery ]
1704                                 );
1705
1706                                 if ( $resultDetails['redirect'] ) {
1707                                         if ( $extraQuery !== '' ) {
1708                                                 $extraQuery = '&' . $extraQuery;
1709                                         }
1710                                         $extraQuery = 'redirect=no' . $extraQuery;
1711                                 }
1712                                 if ( $extraQueryRedirect ) {
1713                                         if ( $extraQuery !== '' ) {
1714                                                 $extraQuery .= '&';
1715                                         }
1716                                         $extraQuery .= $extraQueryRedirect;
1717                                 }
1718
1719                                 $out->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1720                                 return false;
1721
1722                         case self::AS_SPAM_ERROR:
1723                                 $this->spamPageWithContent( $resultDetails['spam'] );
1724                                 return false;
1725
1726                         case self::AS_BLOCKED_PAGE_FOR_USER:
1727                                 throw new UserBlockedError( $this->context->getUser()->getBlock() );
1728
1729                         case self::AS_IMAGE_REDIRECT_ANON:
1730                         case self::AS_IMAGE_REDIRECT_LOGGED:
1731                                 throw new PermissionsError( 'upload' );
1732
1733                         case self::AS_READ_ONLY_PAGE_ANON:
1734                         case self::AS_READ_ONLY_PAGE_LOGGED:
1735                                 throw new PermissionsError( 'edit' );
1736
1737                         case self::AS_READ_ONLY_PAGE:
1738                                 throw new ReadOnlyError;
1739
1740                         case self::AS_RATE_LIMITED:
1741                                 throw new ThrottledError();
1742
1743                         case self::AS_NO_CREATE_PERMISSION:
1744                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1745                                 throw new PermissionsError( $permission );
1746
1747                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1748                                 throw new PermissionsError( 'editcontentmodel' );
1749
1750                         default:
1751                                 // We don't recognize $status->value. The only way that can happen
1752                                 // is if an extension hook aborted from inside ArticleSave.
1753                                 // Render the status object into $this->hookError
1754                                 // FIXME this sucks, we should just use the Status object throughout
1755                                 $this->hookError = '<div class="error">' . "\n" . $status->getWikiText() .
1756                                         '</div>';
1757                                 return true;
1758                 }
1759         }
1760
1761         /**
1762          * Run hooks that can filter edits just before they get saved.
1763          *
1764          * @param Content $content The Content to filter.
1765          * @param Status $status For reporting the outcome to the caller
1766          * @param User $user The user performing the edit
1767          *
1768          * @return bool
1769          */
1770         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1771                 // Run old style post-section-merge edit filter
1772                 if ( $this->hookError != '' ) {
1773                         # ...or the hook could be expecting us to produce an error
1774                         $status->fatal( 'hookaborted' );
1775                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1776                         return false;
1777                 }
1778
1779                 // Run new style post-section-merge edit filter
1780                 if ( !Hooks::run( 'EditFilterMergedContent',
1781                                 [ $this->context, $content, $status, $this->summary,
1782                                 $user, $this->minoredit ] )
1783                 ) {
1784                         # Error messages etc. could be handled within the hook...
1785                         if ( $status->isGood() ) {
1786                                 $status->fatal( 'hookaborted' );
1787                                 // Not setting $this->hookError here is a hack to allow the hook
1788                                 // to cause a return to the edit page without $this->hookError
1789                                 // being set. This is used by ConfirmEdit to display a captcha
1790                                 // without any error message cruft.
1791                         } else {
1792                                 $this->hookError = $this->formatStatusErrors( $status );
1793                         }
1794                         // Use the existing $status->value if the hook set it
1795                         if ( !$status->value ) {
1796                                 $status->value = self::AS_HOOK_ERROR;
1797                         }
1798                         return false;
1799                 } elseif ( !$status->isOK() ) {
1800                         # ...or the hook could be expecting us to produce an error
1801                         // FIXME this sucks, we should just use the Status object throughout
1802                         if ( !$status->getErrors() ) {
1803                                 // Provide a fallback error message if none was set
1804                                 $status->fatal( 'hookaborted' );
1805                         }
1806                         $this->hookError = $this->formatStatusErrors( $status );
1807                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1808                         return false;
1809                 }
1810
1811                 return true;
1812         }
1813
1814         /**
1815          * Wrap status errors in an errorbox for increased visibility
1816          *
1817          * @param Status $status
1818          * @return string Wikitext
1819          */
1820         private function formatStatusErrors( Status $status ) {
1821                 $errmsg = $status->getWikiText(
1822                         'edit-error-short',
1823                         'edit-error-long',
1824                         $this->context->getLanguage()
1825                 );
1826                 return <<<ERROR
1827 <div class="errorbox">
1828 {$errmsg}
1829 </div>
1830 <br clear="all" />
1831 ERROR;
1832         }
1833
1834         /**
1835          * Return the summary to be used for a new section.
1836          *
1837          * @param string $sectionanchor Set to the section anchor text
1838          * @return string
1839          */
1840         private function newSectionSummary( &$sectionanchor = null ) {
1841                 if ( $this->sectiontitle !== '' ) {
1842                         $sectionanchor = $this->guessSectionName( $this->sectiontitle );
1843                         // If no edit summary was specified, create one automatically from the section
1844                         // title and have it link to the new section. Otherwise, respect the summary as
1845                         // passed.
1846                         if ( $this->summary === '' ) {
1847                                 $cleanSectionTitle = MediaWikiServices::getInstance()->getParser()
1848                                         ->stripSectionName( $this->sectiontitle );
1849                                 return $this->context->msg( 'newsectionsummary' )
1850                                         ->plaintextParams( $cleanSectionTitle )->inContentLanguage()->text();
1851                         }
1852                 } elseif ( $this->summary !== '' ) {
1853                         $sectionanchor = $this->guessSectionName( $this->summary );
1854                         # This is a new section, so create a link to the new section
1855                         # in the revision summary.
1856                         $cleanSummary = MediaWikiServices::getInstance()->getParser()
1857                                 ->stripSectionName( $this->summary );
1858                         return $this->context->msg( 'newsectionsummary' )
1859                                 ->plaintextParams( $cleanSummary )->inContentLanguage()->text();
1860                 }
1861                 return $this->summary;
1862         }
1863
1864         /**
1865          * Attempt submission (no UI)
1866          *
1867          * @param array &$result Array to add statuses to, currently with the
1868          *   possible keys:
1869          *   - spam (string): Spam string from content if any spam is detected by
1870          *     matchSpamRegex.
1871          *   - sectionanchor (string): Section anchor for a section save.
1872          *   - nullEdit (bool): Set if doEditContent is OK.  True if null edit,
1873          *     false otherwise.
1874          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1875          *     revision is a redirect.
1876          * @param bool $bot True if edit is being made under the bot right.
1877          *
1878          * @return Status Status object, possibly with a message, but always with
1879          *   one of the AS_* constants in $status->value,
1880          *
1881          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1882          *   various error display idiosyncrasies. There are also lots of cases
1883          *   where error metadata is set in the object and retrieved later instead
1884          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1885          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1886          * time.
1887          */
1888         public function internalAttemptSave( &$result, $bot = false ) {
1889                 $status = Status::newGood();
1890                 $user = $this->context->getUser();
1891                 $permissionManager = MediaWikiServices::getInstance()->getPermissionManager();
1892
1893                 if ( !Hooks::run( 'EditPage::attemptSave', [ $this ] ) ) {
1894                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1895                         $status->fatal( 'hookaborted' );
1896                         $status->value = self::AS_HOOK_ERROR;
1897                         return $status;
1898                 }
1899
1900                 if ( $this->unicodeCheck !== self::UNICODE_CHECK ) {
1901                         $status->fatal( 'unicode-support-fail' );
1902                         $status->value = self::AS_UNICODE_NOT_SUPPORTED;
1903                         return $status;
1904                 }
1905
1906                 $request = $this->context->getRequest();
1907                 $spam = $request->getText( 'wpAntispam' );
1908                 if ( $spam !== '' ) {
1909                         wfDebugLog(
1910                                 'SimpleAntiSpam',
1911                                 $user->getName() .
1912                                 ' editing "' .
1913                                 $this->mTitle->getPrefixedText() .
1914                                 '" submitted bogus field "' .
1915                                 $spam .
1916                                 '"'
1917                         );
1918                         $status->fatal( 'spamprotectionmatch', false );
1919                         $status->value = self::AS_SPAM_ERROR;
1920                         return $status;
1921                 }
1922
1923                 try {
1924                         # Construct Content object
1925                         $textbox_content = $this->toEditContent( $this->textbox1 );
1926                 } catch ( MWContentSerializationException $ex ) {
1927                         $status->fatal(
1928                                 'content-failed-to-parse',
1929                                 $this->contentModel,
1930                                 $this->contentFormat,
1931                                 $ex->getMessage()
1932                         );
1933                         $status->value = self::AS_PARSE_ERROR;
1934                         return $status;
1935                 }
1936
1937                 # Check image redirect
1938                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1939                         $textbox_content->isRedirect() &&
1940                         !$permissionManager->userHasRight( $user, 'upload' )
1941                 ) {
1942                                 $code = $user->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1943                                 $status->setResult( false, $code );
1944
1945                                 return $status;
1946                 }
1947
1948                 # Check for spam
1949                 $match = self::matchSummarySpamRegex( $this->summary );
1950                 if ( $match === false && $this->section == 'new' ) {
1951                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1952                         # regular summaries, it is added to the actual wikitext.
1953                         if ( $this->sectiontitle !== '' ) {
1954                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1955                                 $match = self::matchSpamRegex( $this->sectiontitle );
1956                         } else {
1957                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1958                                 # is used with the 'summary' parameter.
1959                                 $match = self::matchSpamRegex( $this->summary );
1960                         }
1961                 }
1962                 if ( $match === false ) {
1963                         $match = self::matchSpamRegex( $this->textbox1 );
1964                 }
1965                 if ( $match !== false ) {
1966                         $result['spam'] = $match;
1967                         $ip = $request->getIP();
1968                         $pdbk = $this->mTitle->getPrefixedDBkey();
1969                         $match = str_replace( "\n", '', $match );
1970                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1971                         $status->fatal( 'spamprotectionmatch', $match );
1972                         $status->value = self::AS_SPAM_ERROR;
1973                         return $status;
1974                 }
1975                 if ( !Hooks::run(
1976                         'EditFilter',
1977                         [ $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ] )
1978                 ) {
1979                         # Error messages etc. could be handled within the hook...
1980                         $status->fatal( 'hookaborted' );
1981                         $status->value = self::AS_HOOK_ERROR;
1982                         return $status;
1983                 } elseif ( $this->hookError != '' ) {
1984                         # ...or the hook could be expecting us to produce an error
1985                         $status->fatal( 'hookaborted' );
1986                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1987                         return $status;
1988                 }
1989
1990                 if ( $permissionManager->isBlockedFrom( $user, $this->mTitle ) ) {
1991                         // Auto-block user's IP if the account was "hard" blocked
1992                         if ( !wfReadOnly() ) {
1993                                 $user->spreadAnyEditBlock();
1994                         }
1995                         # Check block state against master, thus 'false'.
1996                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1997                         return $status;
1998                 }
1999
2000                 $this->contentLength = strlen( $this->textbox1 );
2001                 $config = $this->context->getConfig();
2002                 $maxArticleSize = $config->get( 'MaxArticleSize' );
2003                 if ( $this->contentLength > $maxArticleSize * 1024 ) {
2004                         // Error will be displayed by showEditForm()
2005                         $this->tooBig = true;
2006                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
2007                         return $status;
2008                 }
2009
2010                 if ( !$permissionManager->userHasRight( $user, 'edit' ) ) {
2011                         if ( $user->isAnon() ) {
2012                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
2013                                 return $status;
2014                         } else {
2015                                 $status->fatal( 'readonlytext' );
2016                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
2017                                 return $status;
2018                         }
2019                 }
2020
2021                 $changingContentModel = false;
2022                 if ( $this->contentModel !== $this->mTitle->getContentModel() ) {
2023                         if ( !$config->get( 'ContentHandlerUseDB' ) ) {
2024                                 $status->fatal( 'editpage-cannot-use-custom-model' );
2025                                 $status->value = self::AS_CANNOT_USE_CUSTOM_MODEL;
2026                                 return $status;
2027                         } elseif ( !$permissionManager->userHasRight( $user, 'editcontentmodel' ) ) {
2028                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
2029                                 return $status;
2030                         }
2031                         // Make sure the user can edit the page under the new content model too
2032                         $titleWithNewContentModel = clone $this->mTitle;
2033                         $titleWithNewContentModel->setContentModel( $this->contentModel );
2034
2035                         $canEditModel = $permissionManager->userCan(
2036                                 'editcontentmodel',
2037                                 $user,
2038                                 $titleWithNewContentModel
2039                         );
2040
2041                         if (
2042                                 !$canEditModel
2043                                 || !$permissionManager->userCan( 'edit', $user, $titleWithNewContentModel )
2044                         ) {
2045                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
2046
2047                                 return $status;
2048                         }
2049
2050                         $changingContentModel = true;
2051                         $oldContentModel = $this->mTitle->getContentModel();
2052                 }
2053
2054                 if ( $this->changeTags ) {
2055                         $changeTagsStatus = ChangeTags::canAddTagsAccompanyingChange(
2056                                 $this->changeTags, $user );
2057                         if ( !$changeTagsStatus->isOK() ) {
2058                                 $changeTagsStatus->value = self::AS_CHANGE_TAG_ERROR;
2059                                 return $changeTagsStatus;
2060                         }
2061                 }
2062
2063                 if ( wfReadOnly() ) {
2064                         $status->fatal( 'readonlytext' );
2065                         $status->value = self::AS_READ_ONLY_PAGE;
2066                         return $status;
2067                 }
2068                 if ( $user->pingLimiter() || $user->pingLimiter( 'linkpurge', 0 )
2069                         || ( $changingContentModel && $user->pingLimiter( 'editcontentmodel' ) )
2070                 ) {
2071                         $status->fatal( 'actionthrottledtext' );
2072                         $status->value = self::AS_RATE_LIMITED;
2073                         return $status;
2074                 }
2075
2076                 # If the article has been deleted while editing, don't save it without
2077                 # confirmation
2078                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
2079                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
2080                         return $status;
2081                 }
2082
2083                 # Load the page data from the master. If anything changes in the meantime,
2084                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
2085                 $this->page->loadPageData( 'fromdbmaster' );
2086                 $new = !$this->page->exists();
2087
2088                 if ( $new ) {
2089                         // Late check for create permission, just in case *PARANOIA*
2090                         if ( !$permissionManager->userCan( 'create', $user, $this->mTitle ) ) {
2091                                 $status->fatal( 'nocreatetext' );
2092                                 $status->value = self::AS_NO_CREATE_PERMISSION;
2093                                 wfDebug( __METHOD__ . ": no create permission\n" );
2094                                 return $status;
2095                         }
2096
2097                         // Don't save a new page if it's blank or if it's a MediaWiki:
2098                         // message with content equivalent to default (allow empty pages
2099                         // in this case to disable messages, see T52124)
2100                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
2101                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
2102                                 $defaultText = $defaultMessageText;
2103                         } else {
2104                                 $defaultText = '';
2105                         }
2106
2107                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
2108                                 $this->blankArticle = true;
2109                                 $status->fatal( 'blankarticle' );
2110                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
2111                                 return $status;
2112                         }
2113
2114                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $user ) ) {
2115                                 return $status;
2116                         }
2117
2118                         $content = $textbox_content;
2119
2120                         $result['sectionanchor'] = '';
2121                         if ( $this->section == 'new' ) {
2122                                 if ( $this->sectiontitle !== '' ) {
2123                                         // Insert the section title above the content.
2124                                         $content = $content->addSectionHeader( $this->sectiontitle );
2125                                 } elseif ( $this->summary !== '' ) {
2126                                         // Insert the section title above the content.
2127                                         $content = $content->addSectionHeader( $this->summary );
2128                                 }
2129                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
2130                         }
2131
2132                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
2133
2134                 } else { # not $new
2135
2136                         # Article exists. Check for edit conflict.
2137
2138                         $this->page->clear(); # Force reload of dates, etc.
2139                         $timestamp = $this->page->getTimestamp();
2140                         $latest = $this->page->getLatest();
2141
2142                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
2143
2144                         // An edit conflict is detected if the current revision is different from the
2145                         // revision that was current when editing was initiated on the client.
2146                         // This is checked based on the timestamp and revision ID.
2147                         // TODO: the timestamp based check can probably go away now.
2148                         if ( $timestamp != $this->edittime
2149                                 || ( $this->editRevId !== null && $this->editRevId != $latest )
2150                         ) {
2151                                 $this->isConflict = true;
2152                                 if ( $this->section == 'new' ) {
2153                                         if ( $this->page->getUserText() == $user->getName() &&
2154                                                 $this->page->getComment() == $this->newSectionSummary()
2155                                         ) {
2156                                                 // Probably a duplicate submission of a new comment.
2157                                                 // This can happen when CDN resends a request after
2158                                                 // a timeout but the first one actually went through.
2159                                                 wfDebug( __METHOD__
2160                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
2161                                         } else {
2162                                                 // New comment; suppress conflict.
2163                                                 $this->isConflict = false;
2164                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
2165                                         }
2166                                 } elseif ( $this->section == ''
2167                                         && Revision::userWasLastToEdit(
2168                                                 DB_MASTER, $this->mTitle->getArticleID(),
2169                                                 $user->getId(), $this->edittime
2170                                         )
2171                                 ) {
2172                                         # Suppress edit conflict with self, except for section edits where merging is required.
2173                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
2174                                         $this->isConflict = false;
2175                                 }
2176                         }
2177
2178                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
2179                         if ( $this->sectiontitle !== '' ) {
2180                                 $sectionTitle = $this->sectiontitle;
2181                         } else {
2182                                 $sectionTitle = $this->summary;
2183                         }
2184
2185                         $content = null;
2186
2187                         if ( $this->isConflict ) {
2188                                 wfDebug( __METHOD__
2189                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
2190                                         . " (id '{$this->editRevId}') (article time '{$timestamp}')\n" );
2191                                 // @TODO: replaceSectionAtRev() with base ID (not prior current) for ?oldid=X case
2192                                 // ...or disable section editing for non-current revisions (not exposed anyway).
2193                                 if ( $this->editRevId !== null ) {
2194                                         $content = $this->page->replaceSectionAtRev(
2195                                                 $this->section,
2196                                                 $textbox_content,
2197                                                 $sectionTitle,
2198                                                 $this->editRevId
2199                                         );
2200                                 } else {
2201                                         $content = $this->page->replaceSectionContent(
2202                                                 $this->section,
2203                                                 $textbox_content,
2204                                                 $sectionTitle,
2205                                                 $this->edittime
2206                                         );
2207                                 }
2208                         } else {
2209                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
2210                                 $content = $this->page->replaceSectionContent(
2211                                         $this->section,
2212                                         $textbox_content,
2213                                         $sectionTitle
2214                                 );
2215                         }
2216
2217                         if ( is_null( $content ) ) {
2218                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
2219                                 $this->isConflict = true;
2220                                 $content = $textbox_content; // do not try to merge here!
2221                         } elseif ( $this->isConflict ) {
2222                                 # Attempt merge
2223                                 if ( $this->mergeChangesIntoContent( $content ) ) {
2224                                         // Successful merge! Maybe we should tell the user the good news?
2225                                         $this->isConflict = false;
2226                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
2227                                 } else {
2228                                         $this->section = '';
2229                                         $this->textbox1 = ContentHandler::getContentText( $content );
2230                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
2231                                 }
2232                         }
2233
2234                         if ( $this->isConflict ) {
2235                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
2236                                 return $status;
2237                         }
2238
2239                         if ( !$this->runPostMergeFilters( $content, $status, $user ) ) {
2240                                 return $status;
2241                         }
2242
2243                         if ( $this->section == 'new' ) {
2244                                 // Handle the user preference to force summaries here
2245                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
2246                                         $this->missingSummary = true;
2247                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
2248                                         $status->value = self::AS_SUMMARY_NEEDED;
2249                                         return $status;
2250                                 }
2251
2252                                 // Do not allow the user to post an empty comment
2253                                 if ( $this->textbox1 == '' ) {
2254                                         $this->missingComment = true;
2255                                         $status->fatal( 'missingcommenttext' );
2256                                         $status->value = self::AS_TEXTBOX_EMPTY;
2257                                         return $status;
2258                                 }
2259                         } elseif ( !$this->allowBlankSummary
2260                                 && !$content->equals( $this->getOriginalContent( $user ) )
2261                                 && !$content->isRedirect()
2262                                 && md5( $this->summary ) == $this->autoSumm
2263                         ) {
2264                                 $this->missingSummary = true;
2265                                 $status->fatal( 'missingsummary' );
2266                                 $status->value = self::AS_SUMMARY_NEEDED;
2267                                 return $status;
2268                         }
2269
2270                         # All's well
2271                         $sectionanchor = '';
2272                         if ( $this->section == 'new' ) {
2273                                 $this->summary = $this->newSectionSummary( $sectionanchor );
2274                         } elseif ( $this->section != '' ) {
2275                                 # Try to get a section anchor from the section source, redirect
2276                                 # to edited section if header found.
2277                                 # XXX: Might be better to integrate this into Article::replaceSectionAtRev
2278                                 # for duplicate heading checking and maybe parsing.
2279                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
2280                                 # We can't deal with anchors, includes, html etc in the header for now,
2281                                 # headline would need to be parsed to improve this.
2282                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
2283                                         $sectionanchor = $this->guessSectionName( $matches[2] );
2284                                 }
2285                         }
2286                         $result['sectionanchor'] = $sectionanchor;
2287
2288                         // Save errors may fall down to the edit form, but we've now
2289                         // merged the section into full text. Clear the section field
2290                         // so that later submission of conflict forms won't try to
2291                         // replace that into a duplicated mess.
2292                         $this->textbox1 = $this->toEditText( $content );
2293                         $this->section = '';
2294
2295                         $status->value = self::AS_SUCCESS_UPDATE;
2296                 }
2297
2298                 if ( !$this->allowSelfRedirect
2299                         && $content->isRedirect()
2300                         && $content->getRedirectTarget()->equals( $this->getTitle() )
2301                 ) {
2302                         // If the page already redirects to itself, don't warn.
2303                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
2304                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
2305                                 $this->selfRedirect = true;
2306                                 $status->fatal( 'selfredirect' );
2307                                 $status->value = self::AS_SELF_REDIRECT;
2308                                 return $status;
2309                         }
2310                 }
2311
2312                 // Check for length errors again now that the section is merged in
2313                 $this->contentLength = strlen( $this->toEditText( $content ) );
2314                 if ( $this->contentLength > $maxArticleSize * 1024 ) {
2315                         $this->tooBig = true;
2316                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
2317                         return $status;
2318                 }
2319
2320                 $flags = EDIT_AUTOSUMMARY |
2321                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
2322                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
2323                         ( $bot ? EDIT_FORCE_BOT : 0 );
2324
2325                 $doEditStatus = $this->page->doEditContent(
2326                         $content,
2327                         $this->summary,
2328                         $flags,
2329                         false,
2330                         $user,
2331                         $content->getDefaultFormat(),
2332                         $this->changeTags,
2333                         $this->undidRev
2334                 );
2335
2336                 if ( !$doEditStatus->isOK() ) {
2337                         // Failure from doEdit()
2338                         // Show the edit conflict page for certain recognized errors from doEdit(),
2339                         // but don't show it for errors from extension hooks
2340                         $errors = $doEditStatus->getErrorsArray();
2341                         if ( in_array( $errors[0][0],
2342                                         [ 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ] )
2343                         ) {
2344                                 $this->isConflict = true;
2345                                 // Destroys data doEdit() put in $status->value but who cares
2346                                 $doEditStatus->value = self::AS_END;
2347                         }
2348                         return $doEditStatus;
2349                 }
2350
2351                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
2352                 if ( $result['nullEdit'] ) {
2353                         // We don't know if it was a null edit until now, so increment here
2354                         $user->pingLimiter( 'linkpurge' );
2355                 }
2356                 $result['redirect'] = $content->isRedirect();
2357
2358                 $this->updateWatchlist();
2359
2360                 // If the content model changed, add a log entry
2361                 if ( $changingContentModel ) {
2362                         $this->addContentModelChangeLogEntry(
2363                                 $user,
2364                                 $new ? false : $oldContentModel,
2365                                 $this->contentModel,
2366                                 $this->summary
2367                         );
2368                 }
2369
2370                 return $status;
2371         }
2372
2373         /**
2374          * @param User $user
2375          * @param string|false $oldModel false if the page is being newly created
2376          * @param string $newModel
2377          * @param string $reason
2378          */
2379         protected function addContentModelChangeLogEntry( User $user, $oldModel, $newModel, $reason ) {
2380                 $new = $oldModel === false;
2381                 $log = new ManualLogEntry( 'contentmodel', $new ? 'new' : 'change' );
2382                 $log->setPerformer( $user );
2383                 $log->setTarget( $this->mTitle );
2384                 $log->setComment( $reason );
2385                 $log->setParameters( [
2386                         '4::oldmodel' => $oldModel,
2387                         '5::newmodel' => $newModel
2388                 ] );
2389                 $logid = $log->insert();
2390                 $log->publish( $logid );
2391         }
2392
2393         /**
2394          * Register the change of watch status
2395          */
2396         protected function updateWatchlist() {
2397                 $user = $this->context->getUser();
2398                 if ( !$user->isLoggedIn() ) {
2399                         return;
2400                 }
2401
2402                 $title = $this->mTitle;
2403                 $watch = $this->watchthis;
2404                 // Do this in its own transaction to reduce contention...
2405                 DeferredUpdates::addCallableUpdate( function () use ( $user, $title, $watch ) {
2406                         if ( $watch == $user->isWatched( $title, User::IGNORE_USER_RIGHTS ) ) {
2407                                 return; // nothing to change
2408                         }
2409                         WatchAction::doWatchOrUnwatch( $watch, $title, $user );
2410                 } );
2411         }
2412
2413         /**
2414          * Attempts to do 3-way merge of edit content with a base revision
2415          * and current content, in case of edit conflict, in whichever way appropriate
2416          * for the content type.
2417          *
2418          * @since 1.21
2419          *
2420          * @param Content $editContent
2421          *
2422          * @return bool
2423          */
2424         private function mergeChangesIntoContent( &$editContent ) {
2425                 $db = wfGetDB( DB_MASTER );
2426
2427                 // This is the revision that was current at the time editing was initiated on the client,
2428                 // even if the edit was based on an old revision.
2429                 $baseRevision = $this->getBaseRevision();
2430                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
2431
2432                 if ( is_null( $baseContent ) ) {
2433                         return false;
2434                 }
2435
2436                 // The current state, we want to merge updates into it
2437                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2438                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2439
2440                 if ( is_null( $currentContent ) ) {
2441                         return false;
2442                 }
2443
2444                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2445
2446                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2447
2448                 if ( $result ) {
2449                         $editContent = $result;
2450                         // Update parentRevId to what we just merged.
2451                         $this->parentRevId = $currentRevision->getId();
2452                         return true;
2453                 }
2454
2455                 return false;
2456         }
2457
2458         /**
2459          * Returns the revision that was current at the time editing was initiated on the client,
2460          * even if the edit was based on an old revision.
2461          *
2462          * @warning this method is very poorly named. If the user opened the form with ?oldid=X,
2463          *        one might think of X as the "base revision", which is NOT what this returns,
2464          *        see oldid for that. One might further assume that this corresponds to the $baseRevId
2465          *        parameter of WikiPage::doEditContent, which is not the case either.
2466          *        getExpectedParentRevision() would perhaps be a better name.
2467          *
2468          * @return Revision|null Current version when editing was initiated on the client
2469          */
2470         public function getBaseRevision() {
2471                 if ( !$this->mBaseRevision ) {
2472                         $db = wfGetDB( DB_MASTER );
2473                         $this->mBaseRevision = $this->editRevId
2474                                 ? Revision::newFromId( $this->editRevId, Revision::READ_LATEST )
2475                                 : Revision::loadFromTimestamp( $db, $this->mTitle, $this->edittime );
2476                 }
2477                 return $this->mBaseRevision;
2478         }
2479
2480         /**
2481          * Check given input text against $wgSpamRegex, and return the text of the first match.
2482          *
2483          * @param string $text
2484          *
2485          * @return string|bool Matching string or false
2486          */
2487         public static function matchSpamRegex( $text ) {
2488                 global $wgSpamRegex;
2489                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2490                 $regexes = (array)$wgSpamRegex;
2491                 return self::matchSpamRegexInternal( $text, $regexes );
2492         }
2493
2494         /**
2495          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2496          *
2497          * @param string $text
2498          *
2499          * @return string|bool Matching string or false
2500          */
2501         public static function matchSummarySpamRegex( $text ) {
2502                 global $wgSummarySpamRegex;
2503                 $regexes = (array)$wgSummarySpamRegex;
2504                 return self::matchSpamRegexInternal( $text, $regexes );
2505         }
2506
2507         /**
2508          * @param string $text
2509          * @param array $regexes
2510          * @return bool|string
2511          */
2512         protected static function matchSpamRegexInternal( $text, $regexes ) {
2513                 foreach ( $regexes as $regex ) {
2514                         $matches = [];
2515                         if ( preg_match( $regex, $text, $matches ) ) {
2516                                 return $matches[0];
2517                         }
2518                 }
2519                 return false;
2520         }
2521
2522         public function setHeaders() {
2523                 $out = $this->context->getOutput();
2524
2525                 $out->addModules( 'mediawiki.action.edit' );
2526                 $out->addModuleStyles( 'mediawiki.action.edit.styles' );
2527                 $out->addModuleStyles( 'mediawiki.editfont.styles' );
2528
2529                 $user = $this->context->getUser();
2530
2531                 if ( $user->getOption( 'uselivepreview' ) ) {
2532                         $out->addModules( 'mediawiki.action.edit.preview' );
2533                 }
2534
2535                 if ( $user->getOption( 'useeditwarning' ) ) {
2536                         $out->addModules( 'mediawiki.action.edit.editWarning' );
2537                 }
2538
2539                 # Enabled article-related sidebar, toplinks, etc.
2540                 $out->setArticleRelated( true );
2541
2542                 $contextTitle = $this->getContextTitle();
2543                 if ( $this->isConflict ) {
2544                         $msg = 'editconflict';
2545                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2546                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2547                 } else {
2548                         $msg = $contextTitle->exists()
2549                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2550                                         && $contextTitle->getDefaultMessageText() !== false
2551                                 )
2552                                 ? 'editing'
2553                                 : 'creating';
2554                 }
2555
2556                 # Use the title defined by DISPLAYTITLE magic word when present
2557                 # NOTE: getDisplayTitle() returns HTML while getPrefixedText() returns plain text.
2558                 #       setPageTitle() treats the input as wikitext, which should be safe in either case.
2559                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2560                 if ( $displayTitle === false ) {
2561                         $displayTitle = $contextTitle->getPrefixedText();
2562                 } else {
2563                         $out->setDisplayTitle( $displayTitle );
2564                 }
2565                 $out->setPageTitle( $this->context->msg( $msg, $displayTitle ) );
2566
2567                 $config = $this->context->getConfig();
2568
2569                 # Transmit the name of the message to JavaScript for live preview
2570                 # Keep Resources.php/mediawiki.action.edit.preview in sync with the possible keys
2571                 $out->addJsConfigVars( [
2572                         'wgEditMessage' => $msg,
2573                         'wgAjaxEditStash' => $config->get( 'AjaxEditStash' ),
2574                 ] );
2575
2576                 // Add whether to use 'save' or 'publish' messages to JavaScript for post-edit, other
2577                 // editors, etc.
2578                 $out->addJsConfigVars(
2579                         'wgEditSubmitButtonLabelPublish',
2580                         $config->get( 'EditSubmitButtonLabelPublish' )
2581                 );
2582         }
2583
2584         /**
2585          * Show all applicable editing introductions
2586          */
2587         protected function showIntro() {
2588                 if ( $this->suppressIntro ) {
2589                         return;
2590                 }
2591
2592                 $out = $this->context->getOutput();
2593                 $namespace = $this->mTitle->getNamespace();
2594
2595                 if ( $namespace == NS_MEDIAWIKI ) {
2596                         # Show a warning if editing an interface message
2597                         $out->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2598                         # If this is a default message (but not css, json, or js),
2599                         # show a hint that it is translatable on translatewiki.net
2600                         if (
2601                                 !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2602                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JSON )
2603                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2604                         ) {
2605                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2606                                 if ( $defaultMessageText !== false ) {
2607                                         $out->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2608                                                 'translateinterface' );
2609                                 }
2610                         }
2611                 } elseif ( $namespace == NS_FILE ) {
2612                         # Show a hint to shared repo
2613                         $file = MediaWikiServices::getInstance()->getRepoGroup()->findFile( $this->mTitle );
2614                         if ( $file && !$file->isLocal() ) {
2615                                 $descUrl = $file->getDescriptionUrl();
2616                                 # there must be a description url to show a hint to shared repo
2617                                 if ( $descUrl ) {
2618                                         if ( !$this->mTitle->exists() ) {
2619                                                 $out->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", [
2620                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2621                                                 ] );
2622                                         } else {
2623                                                 $out->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", [
2624                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2625                                                 ] );
2626                                         }
2627                                 }
2628                         }
2629                 }
2630
2631                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2632                 # Show log extract when the user is currently blocked
2633                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2634                         $username = explode( '/', $this->mTitle->getText(), 2 )[0];
2635                         $user = User::newFromName( $username, false /* allow IP users */ );
2636                         $ip = User::isIP( $username );
2637                         $block = DatabaseBlock::newFromTarget( $user, $user );
2638                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2639                                 $out->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2640                                         [ 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ] );
2641                         } elseif (
2642                                 !is_null( $block ) &&
2643                                 $block->getType() != DatabaseBlock::TYPE_AUTO &&
2644                                 ( $block->isSitewide() || $user->isBlockedFrom( $this->mTitle ) )
2645                         ) {
2646                                 // Show log extract if the user is sitewide blocked or is partially
2647                                 // blocked and not allowed to edit their user page or user talk page
2648                                 LogEventsList::showLogExtract(
2649                                         $out,
2650                                         'block',
2651                                         MediaWikiServices::getInstance()->getNamespaceInfo()->
2652                                                 getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2653                                         '',
2654                                         [
2655                                                 'lim' => 1,
2656                                                 'showIfEmpty' => false,
2657                                                 'msgKey' => [
2658                                                         'blocked-notice-logextract',
2659                                                         $user->getName() # Support GENDER in notice
2660                                                 ]
2661                                         ]
2662                                 );
2663                         }
2664                 }
2665                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2666                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2667                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2668                                 $this->context->msg( 'helppage' )->inContentLanguage()->text()
2669                         ) );
2670                         if ( $this->context->getUser()->isLoggedIn() ) {
2671                                 $out->wrapWikiMsg(
2672                                         // Suppress the external link icon, consider the help url an internal one
2673                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2674                                         [
2675                                                 'newarticletext',
2676                                                 $helpLink
2677                                         ]
2678                                 );
2679                         } else {
2680                                 $out->wrapWikiMsg(
2681                                         // Suppress the external link icon, consider the help url an internal one
2682                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2683                                         [
2684                                                 'newarticletextanon',
2685                                                 $helpLink
2686                                         ]
2687                                 );
2688                         }
2689                 }
2690                 # Give a notice if the user is editing a deleted/moved page...
2691                 if ( !$this->mTitle->exists() ) {
2692                         $dbr = wfGetDB( DB_REPLICA );
2693
2694                         LogEventsList::showLogExtract( $out, [ 'delete', 'move' ], $this->mTitle,
2695                                 '',
2696                                 [
2697                                         'lim' => 10,
2698                                         'conds' => [ 'log_action != ' . $dbr->addQuotes( 'revision' ) ],
2699                                         'showIfEmpty' => false,
2700                                         'msgKey' => [ 'recreate-moveddeleted-warn' ]
2701                                 ]
2702                         );
2703                 }
2704         }
2705
2706         /**
2707          * Attempt to show a custom editing introduction, if supplied
2708          *
2709          * @return bool
2710          */
2711         protected function showCustomIntro() {
2712                 if ( $this->editintro ) {
2713                         $title = Title::newFromText( $this->editintro );
2714                         if ( $this->isPageExistingAndViewable( $title, $this->context->getUser() ) ) {
2715                                 // Added using template syntax, to take <noinclude>'s into account.
2716                                 $this->context->getOutput()->addWikiTextAsContent(
2717                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2718                                         /*linestart*/true,
2719                                         $this->mTitle
2720                                 );
2721                                 return true;
2722                         }
2723                 }
2724                 return false;
2725         }
2726
2727         /**
2728          * Gets an editable textual representation of $content.
2729          * The textual representation can be turned by into a Content object by the
2730          * toEditContent() method.
2731          *
2732          * If $content is null or false or a string, $content is returned unchanged.
2733          *
2734          * If the given Content object is not of a type that can be edited using
2735          * the text base EditPage, an exception will be raised. Set
2736          * $this->allowNonTextContent to true to allow editing of non-textual
2737          * content.
2738          *
2739          * @param Content|null|bool|string $content
2740          * @return string The editable text form of the content.
2741          *
2742          * @throws MWException If $content is not an instance of TextContent and
2743          *   $this->allowNonTextContent is not true.
2744          */
2745         protected function toEditText( $content ) {
2746                 if ( $content === null || $content === false || is_string( $content ) ) {
2747                         return $content;
2748                 }
2749
2750                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2751                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2752                 }
2753
2754                 return $content->serialize( $this->contentFormat );
2755         }
2756
2757         /**
2758          * Turns the given text into a Content object by unserializing it.
2759          *
2760          * If the resulting Content object is not of a type that can be edited using
2761          * the text base EditPage, an exception will be raised. Set
2762          * $this->allowNonTextContent to true to allow editing of non-textual
2763          * content.
2764          *
2765          * @param string|null|bool $text Text to unserialize
2766          * @return Content|bool|null The content object created from $text. If $text was false
2767          *   or null, then false or null will be returned instead.
2768          *
2769          * @throws MWException If unserializing the text results in a Content
2770          *   object that is not an instance of TextContent and
2771          *   $this->allowNonTextContent is not true.
2772          */
2773         protected function toEditContent( $text ) {
2774                 if ( $text === false || $text === null ) {
2775                         return $text;
2776                 }
2777
2778                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2779                         $this->contentModel, $this->contentFormat );
2780
2781                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2782                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2783                 }
2784
2785                 return $content;
2786         }
2787
2788         /**
2789          * Send the edit form and related headers to OutputPage
2790          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2791          *     during form output near the top, for captchas and the like.
2792          *
2793          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2794          * use the EditPage::showEditForm:fields hook instead.
2795          */
2796         public function showEditForm( $formCallback = null ) {
2797                 # need to parse the preview early so that we know which templates are used,
2798                 # otherwise users with "show preview after edit box" will get a blank list
2799                 # we parse this near the beginning so that setHeaders can do the title
2800                 # setting work instead of leaving it in getPreviewText
2801                 $previewOutput = '';
2802                 if ( $this->formtype == 'preview' ) {
2803                         $previewOutput = $this->getPreviewText();
2804                 }
2805
2806                 $out = $this->context->getOutput();
2807
2808                 // Avoid PHP 7.1 warning of passing $this by reference
2809                 $editPage = $this;
2810                 Hooks::run( 'EditPage::showEditForm:initial', [ &$editPage, &$out ] );
2811
2812                 $this->setHeaders();
2813
2814                 $this->addTalkPageText();
2815                 $this->addEditNotices();
2816
2817                 if ( !$this->isConflict &&
2818                         $this->section != '' &&
2819                         !$this->isSectionEditSupported() ) {
2820                         // We use $this->section to much before this and getVal('wgSection') directly in other places
2821                         // at this point we can't reset $this->section to '' to fallback to non-section editing.
2822                         // Someone is welcome to try refactoring though
2823                         $out->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2824                         return;
2825                 }
2826
2827                 $this->showHeader();
2828
2829                 $out->addHTML( $this->editFormPageTop );
2830
2831                 $user = $this->context->getUser();
2832                 if ( $user->getOption( 'previewontop' ) ) {
2833                         $this->displayPreviewArea( $previewOutput, true );
2834                 }
2835
2836                 $out->addHTML( $this->editFormTextTop );
2837
2838                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype !== 'save' ) {
2839                         $out->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2840                                 'deletedwhileediting' );
2841                 }
2842
2843                 // @todo add EditForm plugin interface and use it here!
2844                 //       search for textarea1 and textarea2, and allow EditForm to override all uses.
2845                 $out->addHTML( Html::openElement(
2846                         'form',
2847                         [
2848                                 'class' => 'mw-editform',
2849                                 'id' => self::EDITFORM_ID,
2850                                 'name' => self::EDITFORM_ID,
2851                                 'method' => 'post',
2852                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2853                                 'enctype' => 'multipart/form-data'
2854                         ]
2855                 ) );
2856
2857                 if ( is_callable( $formCallback ) ) {
2858                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2859                         call_user_func_array( $formCallback, [ &$out ] );
2860                 }
2861
2862                 // Add a check for Unicode support
2863                 $out->addHTML( Html::hidden( 'wpUnicodeCheck', self::UNICODE_CHECK ) );
2864
2865                 // Add an empty field to trip up spambots
2866                 $out->addHTML(
2867                         Xml::openElement( 'div', [ 'id' => 'antispam-container', 'style' => 'display: none;' ] )
2868                         . Html::rawElement(
2869                                 'label',
2870                                 [ 'for' => 'wpAntispam' ],
2871                                 $this->context->msg( 'simpleantispam-label' )->parse()
2872                         )
2873                         . Xml::element(
2874                                 'input',
2875                                 [
2876                                         'type' => 'text',
2877                                         'name' => 'wpAntispam',
2878                                         'id' => 'wpAntispam',
2879                                         'value' => ''
2880                                 ]
2881                         )
2882                         . Xml::closeElement( 'div' )
2883                 );
2884
2885                 // Avoid PHP 7.1 warning of passing $this by reference
2886                 $editPage = $this;
2887                 Hooks::run( 'EditPage::showEditForm:fields', [ &$editPage, &$out ] );
2888
2889                 // Put these up at the top to ensure they aren't lost on early form submission
2890                 $this->showFormBeforeText();
2891
2892                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2893                         $username = $this->lastDelete->user_name;
2894                         $comment = CommentStore::getStore()
2895                                 ->getComment( 'log_comment', $this->lastDelete )->text;
2896
2897                         // It is better to not parse the comment at all than to have templates expanded in the middle
2898                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2899                         $key = $comment === ''
2900                                 ? 'confirmrecreate-noreason'
2901                                 : 'confirmrecreate';
2902                         $out->addHTML(
2903                                 '<div class="mw-confirm-recreate">' .
2904                                         $this->context->msg( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2905                                 Xml::checkLabel( $this->context->msg( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2906                                         [ 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' ]
2907                                 ) .
2908                                 '</div>'
2909                         );
2910                 }
2911
2912                 # When the summary is hidden, also hide them on preview/show changes
2913                 if ( $this->nosummary ) {
2914                         $out->addHTML( Html::hidden( 'nosummary', true ) );
2915                 }
2916
2917                 # If a blank edit summary was previously provided, and the appropriate
2918                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2919                 # user being bounced back more than once in the event that a summary
2920                 # is not required.
2921                 # ####
2922                 # For a bit more sophisticated detection of blank summaries, hash the
2923                 # automatic one and pass that in the hidden field wpAutoSummary.
2924                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2925                         $out->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2926                 }
2927
2928                 if ( $this->undidRev ) {
2929                         $out->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2930                 }
2931
2932                 if ( $this->selfRedirect ) {
2933                         $out->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2934                 }
2935
2936                 if ( $this->hasPresetSummary ) {
2937                         // If a summary has been preset using &summary= we don't want to prompt for
2938                         // a different summary. Only prompt for a summary if the summary is blanked.
2939                         // (T19416)
2940                         $this->autoSumm = md5( '' );
2941                 }
2942
2943                 $autosumm = $this->autoSumm !== '' ? $this->autoSumm : md5( $this->summary );
2944                 $out->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2945
2946                 $out->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2947                 $out->addHTML( Html::hidden( 'parentRevId', $this->getParentRevId() ) );
2948
2949                 $out->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2950                 $out->addHTML( Html::hidden( 'model', $this->contentModel ) );
2951
2952                 $out->enableOOUI();
2953
2954                 if ( $this->section == 'new' ) {
2955                         $this->showSummaryInput( true, $this->summary );
2956                         $out->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2957                 }
2958
2959                 $out->addHTML( $this->editFormTextBeforeContent );
2960                 if ( $this->isConflict ) {
2961                         // In an edit conflict, we turn textbox2 into the user's text,
2962                         // and textbox1 into the stored version
2963                         $this->textbox2 = $this->textbox1;
2964
2965                         $content = $this->getCurrentContent();
2966                         $this->textbox1 = $this->toEditText( $content );
2967
2968                         $editConflictHelper = $this->getEditConflictHelper();
2969                         $editConflictHelper->setTextboxes( $this->textbox2, $this->textbox1 );
2970                         $editConflictHelper->setContentModel( $this->contentModel );
2971                         $editConflictHelper->setContentFormat( $this->contentFormat );
2972                         $out->addHTML( $editConflictHelper->getEditFormHtmlBeforeContent() );
2973                 }
2974
2975                 if ( !$this->mTitle->isUserConfigPage() ) {
2976                         $out->addHTML( self::getEditToolbar() );
2977                 }
2978
2979                 if ( $this->blankArticle ) {
2980                         $out->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2981                 }
2982
2983                 if ( $this->isConflict ) {
2984                         // In an edit conflict bypass the overridable content form method
2985                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2986                         // resolved between page source edits and custom ui edits using the
2987                         // custom edit ui.
2988                         $conflictTextBoxAttribs = [];
2989                         if ( $this->wasDeletedSinceLastEdit() ) {
2990                                 $conflictTextBoxAttribs['style'] = 'display:none;';
2991                         } elseif ( $this->isOldRev ) {
2992                                 $conflictTextBoxAttribs['class'] = 'mw-textarea-oldrev';
2993                         }
2994
2995                         $out->addHTML( $editConflictHelper->getEditConflictMainTextBox( $conflictTextBoxAttribs ) );
2996                         $out->addHTML( $editConflictHelper->getEditFormHtmlAfterContent() );
2997                 } else {
2998                         $this->showContentForm();
2999                 }
3000
3001                 $out->addHTML( $this->editFormTextAfterContent );
3002
3003                 $this->showStandardInputs();
3004
3005                 $this->showFormAfterText();
3006
3007                 $this->showTosSummary();
3008
3009                 $this->showEditTools();
3010
3011                 $out->addHTML( $this->editFormTextAfterTools . "\n" );
3012
3013                 $out->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
3014
3015                 $out->addHTML( Html::rawElement( 'div', [ 'class' => 'hiddencats' ],
3016                         Linker::formatHiddenCategories( $this->page->getHiddenCategories() ) ) );
3017
3018                 $out->addHTML( Html::rawElement( 'div', [ 'class' => 'limitreport' ],
3019                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
3020
3021                 $out->addModules( 'mediawiki.action.edit.collapsibleFooter' );
3022
3023                 if ( $this->isConflict ) {
3024                         try {
3025                                 $this->showConflict();
3026                         } catch ( MWContentSerializationException $ex ) {
3027                                 // this can't really happen, but be nice if it does.
3028                                 $msg = $this->context->msg(
3029                                         'content-failed-to-parse',
3030                                         $this->contentModel,
3031                                         $this->contentFormat,
3032                                         $ex->getMessage()
3033                                 );
3034                                 $out->wrapWikiTextAsInterface( 'error', $msg->plain() );
3035                         }
3036                 }
3037
3038                 // Set a hidden field so JS knows what edit form mode we are in
3039                 if ( $this->isConflict ) {
3040                         $mode = 'conflict';
3041                 } elseif ( $this->preview ) {
3042                         $mode = 'preview';
3043                 } elseif ( $this->diff ) {
3044                         $mode = 'diff';
3045                 } else {
3046                         $mode = 'text';
3047                 }
3048                 $out->addHTML( Html::hidden( 'mode', $mode, [ 'id' => 'mw-edit-mode' ] ) );
3049
3050                 // Marker for detecting truncated form data.  This must be the last
3051                 // parameter sent in order to be of use, so do not move me.
3052                 $out->addHTML( Html::hidden( 'wpUltimateParam', true ) );
3053                 $out->addHTML( $this->editFormTextBottom . "\n</form>\n" );
3054
3055                 if ( !$user->getOption( 'previewontop' ) ) {
3056                         $this->displayPreviewArea( $previewOutput, false );
3057                 }
3058         }
3059
3060         /**
3061          * Wrapper around TemplatesOnThisPageFormatter to make
3062          * a "templates on this page" list.
3063          *
3064          * @param Title[] $templates
3065          * @return string HTML
3066          */
3067         public function makeTemplatesOnThisPageList( array $templates ) {
3068                 $templateListFormatter = new TemplatesOnThisPageFormatter(
3069                         $this->context, MediaWikiServices::getInstance()->getLinkRenderer()
3070                 );
3071
3072                 // preview if preview, else section if section, else false
3073                 $type = false;
3074                 if ( $this->preview ) {
3075                         $type = 'preview';
3076                 } elseif ( $this->section != '' ) {
3077                         $type = 'section';
3078                 }
3079
3080                 return Html::rawElement( 'div', [ 'class' => 'templatesUsed' ],
3081                         $templateListFormatter->format( $templates, $type )
3082                 );
3083         }
3084
3085         /**
3086          * Extract the section title from current section text, if any.
3087          *
3088          * @param string $text
3089          * @return string|bool String or false
3090          */
3091         public static function extractSectionTitle( $text ) {
3092                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
3093                 if ( !empty( $matches[2] ) ) {
3094                         return MediaWikiServices::getInstance()->getParser()
3095                                 ->stripSectionName( trim( $matches[2] ) );
3096                 } else {
3097                         return false;
3098                 }
3099         }
3100
3101         protected function showHeader() {
3102                 $out = $this->context->getOutput();
3103                 $user = $this->context->getUser();
3104                 if ( $this->isConflict ) {
3105                         $this->addExplainConflictHeader( $out );
3106                         $this->editRevId = $this->page->getLatest();
3107                 } else {
3108                         if ( $this->section != '' && $this->section != 'new' && !$this->summary &&
3109                                 !$this->preview && !$this->diff
3110                         ) {
3111                                 $sectionTitle = self::extractSectionTitle( $this->textbox1 ); // FIXME: use Content object
3112                                 if ( $sectionTitle !== false ) {
3113                                         $this->summary = "/* $sectionTitle */ ";
3114                                 }
3115                         }
3116
3117                         $buttonLabel = $this->context->msg( $this->getSubmitButtonLabel() )->text();
3118
3119                         if ( $this->missingComment ) {
3120                                 $out->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
3121                         }
3122
3123                         if ( $this->missingSummary && $this->section != 'new' ) {
3124                                 $out->wrapWikiMsg(
3125                                         "<div id='mw-missingsummary'>\n$1\n</div>",
3126                                         [ 'missingsummary', $buttonLabel ]
3127                                 );
3128                         }
3129
3130                         if ( $this->missingSummary && $this->section == 'new' ) {
3131                                 $out->wrapWikiMsg(
3132                                         "<div id='mw-missingcommentheader'>\n$1\n</div>",
3133                                         [ 'missingcommentheader', $buttonLabel ]
3134                                 );
3135                         }
3136
3137                         if ( $this->blankArticle ) {
3138                                 $out->wrapWikiMsg(
3139                                         "<div id='mw-blankarticle'>\n$1\n</div>",
3140                                         [ 'blankarticle', $buttonLabel ]
3141                                 );
3142                         }
3143
3144                         if ( $this->selfRedirect ) {
3145                                 $out->wrapWikiMsg(
3146                                         "<div id='mw-selfredirect'>\n$1\n</div>",
3147                                         [ 'selfredirect', $buttonLabel ]
3148                                 );
3149                         }
3150
3151                         if ( $this->hookError !== '' ) {
3152                                 $out->addWikiTextAsInterface( $this->hookError );
3153                         }
3154
3155                         if ( $this->section != 'new' ) {
3156                                 $revision = $this->mArticle->getRevisionFetched();
3157                                 if ( $revision ) {
3158                                         // Let sysop know that this will make private content public if saved
3159
3160                                         if ( !$revision->userCan( RevisionRecord::DELETED_TEXT, $user ) ) {
3161                                                 $out->wrapWikiMsg(
3162                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
3163                                                         'rev-deleted-text-permission'
3164                                                 );
3165                                         } elseif ( $revision->isDeleted( RevisionRecord::DELETED_TEXT ) ) {
3166                                                 $out->wrapWikiMsg(
3167                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
3168                                                         'rev-deleted-text-view'
3169                                                 );
3170                                         }
3171
3172                                         if ( !$revision->isCurrent() ) {
3173                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
3174                                                 $out->wrapWikiMsg(
3175                                                         Html::warningBox( "\n$1\n" ),
3176                                                         'editingold'
3177                                                 );
3178                                                 $this->isOldRev = true;
3179                                         }
3180                                 } elseif ( $this->mTitle->exists() ) {
3181                                         // Something went wrong
3182
3183                                         $out->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
3184                                                 [ 'missing-revision', $this->oldid ] );
3185                                 }
3186                         }
3187                 }
3188
3189                 if ( wfReadOnly() ) {
3190                         $out->wrapWikiMsg(
3191                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
3192                                 [ 'readonlywarning', wfReadOnlyReason() ]
3193                         );
3194                 } elseif ( $user->isAnon() ) {
3195                         if ( $this->formtype != 'preview' ) {
3196                                 $returntoquery = array_diff_key(
3197                                         $this->context->getRequest()->getValues(),
3198                                         [ 'title' => true, 'returnto' => true, 'returntoquery' => true ]
3199                                 );
3200                                 $out->wrapWikiMsg(
3201                                         "<div id='mw-anon-edit-warning' class='warningbox'>\n$1\n</div>",
3202                                         [ 'anoneditwarning',
3203                                                 // Log-in link
3204                                                 SpecialPage::getTitleFor( 'Userlogin' )->getFullURL( [
3205                                                         'returnto' => $this->getTitle()->getPrefixedDBkey(),
3206                                                         'returntoquery' => wfArrayToCgi( $returntoquery ),
3207                                                 ] ),
3208                                                 // Sign-up link
3209                                                 SpecialPage::getTitleFor( 'CreateAccount' )->getFullURL( [
3210                                                         'returnto' => $this->getTitle()->getPrefixedDBkey(),
3211                                                         'returntoquery' => wfArrayToCgi( $returntoquery ),
3212                                                 ] )
3213                                         ]
3214                                 );
3215                         } else {
3216                                 $out->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\" class=\"warningbox\">\n$1</div>",
3217                                         'anonpreviewwarning'
3218                                 );
3219                         }
3220                 } elseif ( $this->mTitle->isUserConfigPage() ) {
3221                         # Check the skin exists
3222                         if ( $this->isWrongCaseUserConfigPage() ) {
3223                                 $out->wrapWikiMsg(
3224                                         "<div class='error' id='mw-userinvalidconfigtitle'>\n$1\n</div>",
3225                                         [ 'userinvalidconfigtitle', $this->mTitle->getSkinFromConfigSubpage() ]
3226                                 );
3227                         }
3228                         if ( $this->getTitle()->isSubpageOf( $user->getUserPage() ) ) {
3229                                 $isUserCssConfig = $this->mTitle->isUserCssConfigPage();
3230                                 $isUserJsonConfig = $this->mTitle->isUserJsonConfigPage();
3231                                 $isUserJsConfig = $this->mTitle->isUserJsConfigPage();
3232
3233                                 $warning = $isUserCssConfig
3234                                         ? 'usercssispublic'
3235                                         : ( $isUserJsonConfig ? 'userjsonispublic' : 'userjsispublic' );
3236
3237                                 $out->wrapWikiMsg( '<div class="mw-userconfigpublic">$1</div>', $warning );
3238
3239                                 if ( $this->formtype !== 'preview' ) {
3240                                         $config = $this->context->getConfig();
3241                                         if ( $isUserCssConfig && $config->get( 'AllowUserCss' ) ) {
3242                                                 $out->wrapWikiMsg(
3243                                                         "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
3244                                                         [ 'usercssyoucanpreview' ]
3245                                                 );
3246                                         } elseif ( $isUserJsonConfig /* No comparable 'AllowUserJson' */ ) {
3247                                                 $out->wrapWikiMsg(
3248                                                         "<div id='mw-userjsonyoucanpreview'>\n$1\n</div>",
3249                                                         [ 'userjsonyoucanpreview' ]
3250                                                 );
3251                                         } elseif ( $isUserJsConfig && $config->get( 'AllowUserJs' ) ) {
3252                                                 $out->wrapWikiMsg(
3253                                                         "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
3254                                                         [ 'userjsyoucanpreview' ]
3255                                                 );
3256                                         }
3257                                 }
3258                         }
3259                 }
3260
3261                 $this->addPageProtectionWarningHeaders();
3262
3263                 $this->addLongPageWarningHeader();
3264
3265                 # Add header copyright warning
3266                 $this->showHeaderCopyrightWarning();
3267         }
3268
3269         /**
3270          * Helper function for summary input functions, which returns the necessary
3271          * attributes for the input.
3272          *
3273          * @param array|null $inputAttrs Array of attrs to use on the input
3274          * @return array
3275          */
3276         private function getSummaryInputAttributes( array $inputAttrs = null ) {
3277                 // HTML maxlength uses "UTF-16 code units", which means that characters outside BMP
3278                 // (e.g. emojis) count for two each. This limit is overridden in JS to instead count
3279                 // Unicode codepoints.
3280                 return ( is_array( $inputAttrs ) ? $inputAttrs : [] ) + [
3281                         'id' => 'wpSummary',
3282                         'name' => 'wpSummary',
3283                         'maxlength' => CommentStore::COMMENT_CHARACTER_LIMIT,
3284                         'tabindex' => 1,
3285                         'size' => 60,
3286                         'spellcheck' => 'true',
3287                 ];
3288         }
3289
3290         /**
3291          * Builds a standard summary input with a label.
3292          *
3293          * @param string $summary The value of the summary input
3294          * @param string|null $labelText The html to place inside the label
3295          * @param array|null $inputAttrs Array of attrs to use on the input
3296          *
3297          * @return OOUI\FieldLayout OOUI FieldLayout with Label and Input
3298          */
3299         function getSummaryInputWidget( $summary = "", $labelText = null, $inputAttrs = null ) {
3300                 $inputAttrs = OOUI\Element::configFromHtmlAttributes(
3301                         $this->getSummaryInputAttributes( $inputAttrs )
3302                 );
3303                 $inputAttrs += [
3304                         'title' => Linker::titleAttrib( 'summary' ),
3305                         'accessKey' => Linker::accesskey( 'summary' ),
3306                 ];
3307
3308                 // For compatibility with old scripts and extensions, we want the legacy 'id' on the `<input>`
3309                 $inputAttrs['inputId'] = $inputAttrs['id'];
3310                 $inputAttrs['id'] = 'wpSummaryWidget';
3311
3312                 return new OOUI\FieldLayout(
3313                         new OOUI\TextInputWidget( [
3314                                 'value' => $summary,
3315                                 'infusable' => true,
3316                         ] + $inputAttrs ),
3317                         [
3318                                 'label' => new OOUI\HtmlSnippet( $labelText ),
3319                                 'align' => 'top',
3320                                 'id' => 'wpSummaryLabel',
3321                                 'classes' => [ $this->missingSummary ? 'mw-summarymissed' : 'mw-summary' ],
3322                         ]
3323                 );
3324         }
3325
3326         /**
3327          * @param bool $isSubjectPreview True if this is the section subject/title
3328          *   up top, or false if this is the comment summary
3329          *   down below the textarea
3330          * @param string $summary The text of the summary to display
3331          */
3332         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
3333                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
3334                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
3335                 if ( $isSubjectPreview ) {
3336                         if ( $this->nosummary ) {
3337                                 return;
3338                         }
3339                 } elseif ( !$this->mShowSummaryField ) {
3340                         return;
3341                 }
3342
3343                 $labelText = $this->context->msg( $isSubjectPreview ? 'subject' : 'summary' )->parse();
3344                 $this->context->getOutput()->addHTML( $this->getSummaryInputWidget(
3345                                 $summary,
3346                                 $labelText,
3347                                 [ 'class' => $summaryClass ]
3348                         ) );
3349         }
3350
3351         /**
3352          * @param bool $isSubjectPreview True if this is the section subject/title
3353          *   up top, or false if this is the comment summary
3354          *   down below the textarea
3355          * @param string $summary The text of the summary to display
3356          * @return string
3357          */
3358         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
3359                 // avoid spaces in preview, gets always trimmed on save
3360                 $summary = trim( $summary );
3361                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
3362                         return "";
3363                 }
3364
3365                 if ( $isSubjectPreview ) {
3366                         $summary = $this->context->msg( 'newsectionsummary' )
3367                                 ->rawParams( MediaWikiServices::getInstance()->getParser()
3368                                         ->stripSectionName( $summary ) )
3369                                 ->inContentLanguage()->text();
3370                 }
3371
3372                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
3373
3374                 $summary = $this->context->msg( $message )->parse()
3375                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
3376                 return Xml::tags( 'div', [ 'class' => 'mw-summary-preview' ], $summary );
3377         }
3378
3379         protected function showFormBeforeText() {
3380                 $out = $this->context->getOutput();
3381                 $out->addHTML( Html::hidden( 'wpSection', $this->section ) );
3382                 $out->addHTML( Html::hidden( 'wpStarttime', $this->starttime ) );
3383                 $out->addHTML( Html::hidden( 'wpEdittime', $this->edittime ) );
3384                 $out->addHTML( Html::hidden( 'editRevId', $this->editRevId ) );
3385                 $out->addHTML( Html::hidden( 'wpScrolltop', $this->scrolltop, [ 'id' => 'wpScrolltop' ] ) );
3386         }
3387
3388         protected function showFormAfterText() {
3389                 /**
3390                  * To make it harder for someone to slip a user a page
3391                  * which submits an edit form to the wiki without their
3392                  * knowledge, a random token is associated with the login
3393                  * session. If it's not passed back with the submission,
3394                  * we won't save the page, or render user JavaScript and
3395                  * CSS previews.
3396                  *
3397                  * For anon editors, who may not have a session, we just
3398                  * include the constant suffix to prevent editing from
3399                  * broken text-mangling proxies.
3400                  */
3401                 $this->context->getOutput()->addHTML(
3402                         "\n" .
3403                         Html::hidden( "wpEditToken", $this->context->getUser()->getEditToken() ) .
3404                         "\n"
3405                 );
3406         }
3407
3408         /**
3409          * Subpage overridable method for printing the form for page content editing
3410          * By default this simply outputs wpTextbox1
3411          * Subclasses can override this to provide a custom UI for editing;
3412          * be it a form, or simply wpTextbox1 with a modified content that will be
3413          * reverse modified when extracted from the post data.
3414          * Note that this is basically the inverse for importContentFormData
3415          */
3416         protected function showContentForm() {
3417                 $this->showTextbox1();
3418         }
3419
3420         /**
3421          * Method to output wpTextbox1
3422          * The $textoverride method can be used by subclasses overriding showContentForm
3423          * to pass back to this method.
3424          *
3425          * @param array|null $customAttribs Array of html attributes to use in the textarea
3426          * @param string|null $textoverride Optional text to override $this->textarea1 with
3427          */
3428         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
3429                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
3430                         $attribs = [ 'style' => 'display:none;' ];
3431                 } else {
3432                         $builder = new TextboxBuilder();
3433                         $classes = $builder->getTextboxProtectionCSSClasses( $this->getTitle() );
3434
3435                         # Is an old revision being edited?
3436                         if ( $this->isOldRev ) {
3437                                 $classes[] = 'mw-textarea-oldrev';
3438                         }
3439
3440                         $attribs = [ 'tabindex' => 1 ];
3441
3442                         if ( is_array( $customAttribs ) ) {
3443                                 $attribs += $customAttribs;
3444                         }
3445
3446                         $attribs = $builder->mergeClassesIntoAttributes( $classes, $attribs );
3447                 }
3448
3449                 $this->showTextbox(
3450                         $textoverride ?? $this->textbox1,
3451                         'wpTextbox1',
3452                         $attribs
3453                 );
3454         }
3455
3456         protected function showTextbox2() {
3457                 $this->showTextbox( $this->textbox2, 'wpTextbox2', [ 'tabindex' => 6, 'readonly' ] );
3458         }
3459
3460         protected function showTextbox( $text, $name, $customAttribs = [] ) {
3461                 $builder = new TextboxBuilder();
3462                 $attribs = $builder->buildTextboxAttribs(
3463                         $name,
3464                         $customAttribs,
3465                         $this->context->getUser(),
3466                         $this->mTitle
3467                 );
3468
3469                 $this->context->getOutput()->addHTML(
3470                         Html::textarea( $name, $builder->addNewLineAtEnd( $text ), $attribs )
3471                 );
3472         }
3473
3474         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
3475                 $classes = [];
3476                 if ( $isOnTop ) {
3477                         $classes[] = 'ontop';
3478                 }
3479
3480                 $attribs = [ 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) ];
3481
3482                 if ( $this->formtype != 'preview' ) {
3483                         $attribs['style'] = 'display: none;';
3484                 }
3485
3486                 $out = $this->context->getOutput();
3487                 $out->addHTML( Xml::openElement( 'div', $attribs ) );
3488
3489                 if ( $this->formtype == 'preview' ) {
3490                         $this->showPreview( $previewOutput );
3491                 } else {
3492                         // Empty content container for LivePreview
3493                         $pageViewLang = $this->mTitle->getPageViewLanguage();
3494                         $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3495                                 'class' => 'mw-content-' . $pageViewLang->getDir() ];
3496                         $out->addHTML( Html::rawElement( 'div', $attribs ) );
3497                 }
3498
3499                 $out->addHTML( '</div>' );
3500
3501                 if ( $this->formtype == 'diff' ) {
3502                         try {
3503                                 $this->showDiff();
3504                         } catch ( MWContentSerializationException $ex ) {
3505                                 $msg = $this->context->msg(
3506                                         'content-failed-to-parse',
3507                                         $this->contentModel,
3508                                         $this->contentFormat,
3509                                         $ex->getMessage()
3510                                 );
3511                                 $out->wrapWikiTextAsInterface( 'error', $msg->plain() );
3512                         }
3513                 }
3514         }
3515
3516         /**
3517          * Append preview output to OutputPage.
3518          * Includes category rendering if this is a category page.
3519          *
3520          * @param string $text The HTML to be output for the preview.
3521          */
3522         protected function showPreview( $text ) {
3523                 if ( $this->mArticle instanceof CategoryPage ) {
3524                         $this->mArticle->openShowCategory();
3525                 }
3526                 # This hook seems slightly odd here, but makes things more
3527                 # consistent for extensions.
3528                 $out = $this->context->getOutput();
3529                 Hooks::run( 'OutputPageBeforeHTML', [ &$out, &$text ] );
3530                 $out->addHTML( $text );
3531                 if ( $this->mArticle instanceof CategoryPage ) {
3532                         $this->mArticle->closeShowCategory();
3533                 }
3534         }
3535
3536         /**
3537          * Get a diff between the current contents of the edit box and the
3538          * version of the page we're editing from.
3539          *
3540          * If this is a section edit, we'll replace the section as for final
3541          * save and then make a comparison.
3542          */
3543         public function showDiff() {
3544                 $oldtitlemsg = 'currentrev';
3545                 # if message does not exist, show diff against the preloaded default
3546                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3547                         $oldtext = $this->mTitle->getDefaultMessageText();
3548                         if ( $oldtext !== false ) {
3549                                 $oldtitlemsg = 'defaultmessagetext';
3550                                 $oldContent = $this->toEditContent( $oldtext );
3551                         } else {
3552                                 $oldContent = null;
3553                         }
3554                 } else {
3555                         $oldContent = $this->getCurrentContent();
3556                 }
3557
3558                 $textboxContent = $this->toEditContent( $this->textbox1 );
3559                 if ( $this->editRevId !== null ) {
3560                         $newContent = $this->page->replaceSectionAtRev(
3561                                 $this->section, $textboxContent, $this->summary, $this->editRevId
3562                         );
3563                 } else {
3564                         $newContent = $this->page->replaceSectionContent(
3565                                 $this->section, $textboxContent, $this->summary, $this->edittime
3566                         );
3567                 }
3568
3569                 if ( $newContent ) {
3570                         Hooks::run( 'EditPageGetDiffContent', [ $this, &$newContent ] );
3571
3572                         $user = $this->context->getUser();
3573                         $popts = ParserOptions::newFromUserAndLang( $user,
3574                                 MediaWikiServices::getInstance()->getContentLanguage() );
3575                         $newContent = $newContent->preSaveTransform( $this->mTitle, $user, $popts );
3576                 }
3577
3578                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3579                         $oldtitle = $this->context->msg( $oldtitlemsg )->parse();
3580                         $newtitle = $this->context->msg( 'yourtext' )->parse();
3581
3582                         if ( !$oldContent ) {
3583                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3584                         }
3585
3586                         if ( !$newContent ) {
3587                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3588                         }
3589
3590                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->context );
3591                         $de->setContent( $oldContent, $newContent );
3592
3593                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3594                         $de->showDiffStyle();
3595                 } else {
3596                         $difftext = '';
3597                 }
3598
3599                 $this->context->getOutput()->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3600         }
3601
3602         /**
3603          * Show the header copyright warning.
3604          */
3605         protected function showHeaderCopyrightWarning() {
3606                 $msg = 'editpage-head-copy-warn';
3607                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3608                         $this->context->getOutput()->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3609                                 'editpage-head-copy-warn' );
3610                 }
3611         }
3612
3613         /**
3614          * Give a chance for site and per-namespace customizations of
3615          * terms of service summary link that might exist separately
3616          * from the copyright notice.
3617          *
3618          * This will display between the save button and the edit tools,
3619          * so should remain short!
3620          */
3621         protected function showTosSummary() {
3622                 $msg = 'editpage-tos-summary';
3623                 Hooks::run( 'EditPageTosSummary', [ $this->mTitle, &$msg ] );
3624                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3625                         $out = $this->context->getOutput();
3626                         $out->addHTML( '<div class="mw-tos-summary">' );
3627                         $out->addWikiMsg( $msg );
3628                         $out->addHTML( '</div>' );
3629                 }
3630         }
3631
3632         /**
3633          * Inserts optional text shown below edit and upload forms. Can be used to offer special
3634          * characters not present on most keyboards for copying/pasting.
3635          */
3636         protected function showEditTools() {
3637                 $this->context->getOutput()->addHTML( '<div class="mw-editTools">' .
3638                         $this->context->msg( 'edittools' )->inContentLanguage()->parse() .
3639                         '</div>' );
3640         }
3641
3642         /**
3643          * Get the copyright warning
3644          *
3645          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3646          * @return string
3647          */
3648         protected function getCopywarn() {
3649                 return self::getCopyrightWarning( $this->mTitle );
3650         }
3651
3652         /**
3653          * Get the copyright warning, by default returns wikitext
3654          *
3655          * @param Title $title
3656          * @param string $format Output format, valid values are any function of a Message object
3657          * @param Language|string|null $langcode Language code or Language object.
3658          * @return string
3659          */
3660         public static function getCopyrightWarning( $title, $format = 'plain', $langcode = null ) {
3661                 global $wgRightsText;
3662                 if ( $wgRightsText ) {
3663                         $copywarnMsg = [ 'copyrightwarning',
3664                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3665                                 $wgRightsText ];
3666                 } else {
3667                         $copywarnMsg = [ 'copyrightwarning2',
3668                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' ];
3669                 }
3670                 // Allow for site and per-namespace customization of contribution/copyright notice.
3671                 Hooks::run( 'EditPageCopyrightWarning', [ $title, &$copywarnMsg ] );
3672
3673                 $msg = wfMessage( ...$copywarnMsg )->title( $title );
3674                 if ( $langcode ) {
3675                         $msg->inLanguage( $langcode );
3676                 }
3677                 return "<div id=\"editpage-copywarn\">\n" .
3678                         $msg->$format() . "\n</div>";
3679         }
3680
3681         /**
3682          * Get the Limit report for page previews
3683          *
3684          * @since 1.22
3685          * @param ParserOutput|null $output ParserOutput object from the parse
3686          * @return string HTML
3687          */
3688         public static function getPreviewLimitReport( ParserOutput $output = null ) {
3689                 global $wgLang;
3690
3691                 if ( !$output || !$output->getLimitReportData() ) {
3692                         return '';
3693                 }
3694
3695                 $limitReport = Html::rawElement( 'div', [ 'class' => 'mw-limitReportExplanation' ],
3696                         wfMessage( 'limitreport-title' )->parseAsBlock()
3697                 );
3698
3699                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3700                 $limitReport .= Html::openElement( 'div', [ 'class' => 'preview-limit-report-wrapper' ] );
3701
3702                 $limitReport .= Html::openElement( 'table', [
3703                         'class' => 'preview-limit-report wikitable'
3704                 ] ) .
3705                         Html::openElement( 'tbody' );
3706
3707                 foreach ( $output->getLimitReportData() as $key => $value ) {
3708                         if ( Hooks::run( 'ParserLimitReportFormat',
3709                                 [ $key, &$value, &$limitReport, true, true ]
3710                         ) ) {
3711                                 $keyMsg = wfMessage( $key );
3712                                 $valueMsg = wfMessage( [ "$key-value-html", "$key-value" ] );
3713                                 if ( !$valueMsg->exists() ) {
3714                                         $valueMsg = new RawMessage( '$1' );
3715                                 }
3716                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3717                                         $limitReport .= Html::openElement( 'tr' ) .
3718                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3719                                                 Html::rawElement( 'td', null,
3720                                                         $wgLang->formatNum( $valueMsg->params( $value )->parse() )
3721                                                 ) .
3722                                                 Html::closeElement( 'tr' );
3723                                 }
3724                         }
3725                 }
3726
3727                 $limitReport .= Html::closeElement( 'tbody' ) .
3728                         Html::closeElement( 'table' ) .
3729                         Html::closeElement( 'div' );
3730
3731                 return $limitReport;
3732         }
3733
3734         protected function showStandardInputs( &$tabindex = 2 ) {
3735                 $out = $this->context->getOutput();
3736                 $out->addHTML( "<div class='editOptions'>\n" );
3737
3738                 if ( $this->section != 'new' ) {
3739                         $this->showSummaryInput( false, $this->summary );
3740                         $out->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3741                 }
3742
3743                 $checkboxes = $this->getCheckboxesWidget(
3744                         $tabindex,
3745                         [ 'minor' => $this->minoredit, 'watch' => $this->watchthis ]
3746                 );
3747                 $checkboxesHTML = new OOUI\HorizontalLayout( [ 'items' => $checkboxes ] );
3748
3749                 $out->addHTML( "<div class='editCheckboxes'>" . $checkboxesHTML . "</div>\n" );
3750
3751                 // Show copyright warning.
3752                 $out->addWikiTextAsInterface( $this->getCopywarn() );
3753                 $out->addHTML( $this->editFormTextAfterWarn );
3754
3755                 $out->addHTML( "<div class='editButtons'>\n" );
3756                 $out->addHTML( implode( "\n", $this->getEditButtons( $tabindex ) ) . "\n" );
3757
3758                 $cancel = $this->getCancelLink();
3759
3760                 $message = $this->context->msg( 'edithelppage' )->inContentLanguage()->text();
3761                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3762                 $edithelp =
3763                         Html::linkButton(
3764                                 $this->context->msg( 'edithelp' )->text(),
3765                                 [ 'target' => 'helpwindow', 'href' => $edithelpurl ],
3766                                 [ 'mw-ui-quiet' ]
3767                         ) .
3768                         $this->context->msg( 'word-separator' )->escaped() .
3769                         $this->context->msg( 'newwindow' )->parse();
3770
3771                 $out->addHTML( "        <span class='cancelLink'>{$cancel}</span>\n" );
3772                 $out->addHTML( "        <span class='editHelp'>{$edithelp}</span>\n" );
3773                 $out->addHTML( "</div><!-- editButtons -->\n" );
3774
3775                 Hooks::run( 'EditPage::showStandardInputs:options', [ $this, $out, &$tabindex ] );
3776
3777                 $out->addHTML( "</div><!-- editOptions -->\n" );
3778         }
3779
3780         /**
3781          * Show an edit conflict. textbox1 is already shown in showEditForm().
3782          * If you want to use another entry point to this function, be careful.
3783          */
3784         protected function showConflict() {
3785                 $out = $this->context->getOutput();
3786                 // Avoid PHP 7.1 warning of passing $this by reference
3787                 $editPage = $this;
3788                 if ( Hooks::run( 'EditPageBeforeConflictDiff', [ &$editPage, &$out ] ) ) {
3789                         $this->incrementConflictStats();
3790
3791                         $this->getEditConflictHelper()->showEditFormTextAfterFooters();
3792                 }
3793         }
3794
3795         protected function incrementConflictStats() {
3796                 $this->getEditConflictHelper()->incrementConflictStats();
3797         }
3798
3799         /**
3800          * @return string
3801          */
3802         public function getCancelLink() {
3803                 $cancelParams = [];
3804                 if ( !$this->isConflict && $this->oldid > 0 ) {
3805                         $cancelParams['oldid'] = $this->oldid;
3806                 } elseif ( $this->getContextTitle()->isRedirect() ) {
3807                         $cancelParams['redirect'] = 'no';
3808                 }
3809
3810                 return new OOUI\ButtonWidget( [
3811                         'id' => 'mw-editform-cancel',
3812                         'href' => $this->getContextTitle()->getLinkURL( $cancelParams ),
3813                         'label' => new OOUI\HtmlSnippet( $this->context->msg( 'cancel' )->parse() ),
3814                         'framed' => false,
3815                         'infusable' => true,
3816                         'flags' => 'destructive',
3817                 ] );
3818         }
3819
3820         /**
3821          * Returns the URL to use in the form's action attribute.
3822          * This is used by EditPage subclasses when simply customizing the action
3823          * variable in the constructor is not enough. This can be used when the
3824          * EditPage lives inside of a Special page rather than a custom page action.
3825          *
3826          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3827          * @return string
3828          */
3829         protected function getActionURL( Title $title ) {
3830                 return $title->getLocalURL( [ 'action' => $this->action ] );
3831         }
3832
3833         /**
3834          * Check if a page was deleted while the user was editing it, before submit.
3835          * Note that we rely on the logging table, which hasn't been always there,
3836          * but that doesn't matter, because this only applies to brand new
3837          * deletes.
3838          * @return bool
3839          */
3840         protected function wasDeletedSinceLastEdit() {
3841                 if ( $this->deletedSinceEdit !== null ) {
3842                         return $this->deletedSinceEdit;
3843                 }
3844
3845                 $this->deletedSinceEdit = false;
3846
3847                 if ( !$this->mTitle->exists() && $this->mTitle->isDeletedQuick() ) {
3848                         $this->lastDelete = $this->getLastDelete();
3849                         if ( $this->lastDelete ) {
3850                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3851                                 if ( $deleteTime > $this->starttime ) {
3852                                         $this->deletedSinceEdit = true;
3853                                 }
3854                         }
3855                 }
3856
3857                 return $this->deletedSinceEdit;
3858         }
3859
3860         /**
3861          * Get the last log record of this page being deleted, if ever.  This is
3862          * used to detect whether a delete occurred during editing.
3863          * @return bool|stdClass
3864          */
3865         protected function getLastDelete() {
3866                 $dbr = wfGetDB( DB_REPLICA );
3867                 $commentQuery = CommentStore::getStore()->getJoin( 'log_comment' );
3868                 $actorQuery = ActorMigration::newMigration()->getJoin( 'log_user' );
3869                 $data = $dbr->selectRow(
3870                         array_merge( [ 'logging' ], $commentQuery['tables'], $actorQuery['tables'], [ 'user' ] ),
3871                         [
3872                                 'log_type',
3873                                 'log_action',
3874                                 'log_timestamp',
3875                                 'log_namespace',
3876                                 'log_title',
3877                                 'log_params',
3878                                 'log_deleted',
3879                                 'user_name'
3880                         ] + $commentQuery['fields'] + $actorQuery['fields'],
3881                         [
3882                                 'log_namespace' => $this->mTitle->getNamespace(),
3883                                 'log_title' => $this->mTitle->getDBkey(),
3884                                 'log_type' => 'delete',
3885                                 'log_action' => 'delete',
3886                         ],
3887                         __METHOD__,
3888                         [ 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ],
3889                         [
3890                                 'user' => [ 'JOIN', 'user_id=' . $actorQuery['fields']['log_user'] ],
3891                         ] + $commentQuery['joins'] + $actorQuery['joins']
3892                 );
3893                 // Quick paranoid permission checks...
3894                 if ( is_object( $data ) ) {
3895                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3896                                 $data->user_name = $this->context->msg( 'rev-deleted-user' )->escaped();
3897                         }
3898
3899                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3900                                 $data->log_comment_text = $this->context->msg( 'rev-deleted-comment' )->escaped();
3901                                 $data->log_comment_data = null;
3902                         }
3903                 }
3904
3905                 return $data;
3906         }
3907
3908         /**
3909          * Get the rendered text for previewing.
3910          * @throws MWException
3911          * @return string
3912          */
3913         public function getPreviewText() {
3914                 $out = $this->context->getOutput();
3915                 $config = $this->context->getConfig();
3916
3917                 if ( $config->get( 'RawHtml' ) && !$this->mTokenOk ) {
3918                         // Could be an offsite preview attempt. This is very unsafe if
3919                         // HTML is enabled, as it could be an attack.
3920                         $parsedNote = '';
3921                         if ( $this->textbox1 !== '' ) {
3922                                 // Do not put big scary notice, if previewing the empty
3923                                 // string, which happens when you initially edit
3924                                 // a category page, due to automatic preview-on-open.
3925                                 $parsedNote = Html::rawElement( 'div', [ 'class' => 'previewnote' ],
3926                                         $out->parseAsInterface(
3927                                                 $this->context->msg( 'session_fail_preview_html' )->plain()
3928                                         ) );
3929                         }
3930                         $this->incrementEditFailureStats( 'session_loss' );
3931                         return $parsedNote;
3932                 }
3933
3934                 $note = '';
3935
3936                 try {
3937                         $content = $this->toEditContent( $this->textbox1 );
3938
3939                         $previewHTML = '';
3940                         if ( !Hooks::run(
3941                                 'AlternateEditPreview',
3942                                 [ $this, &$content, &$previewHTML, &$this->mParserOutput ] )
3943                         ) {
3944                                 return $previewHTML;
3945                         }
3946
3947                         # provide a anchor link to the editform
3948                         $continueEditing = '<span class="mw-continue-editing">' .
3949                                 '[[#' . self::EDITFORM_ID . '|' .
3950                                 $this->context->getLanguage()->getArrow() . ' ' .
3951                                 $this->context->msg( 'continue-editing' )->text() . ']]</span>';
3952                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3953                                 if ( $this->mTokenOkExceptSuffix ) {
3954                                         $note = $this->context->msg( 'token_suffix_mismatch' )->plain();
3955                                         $this->incrementEditFailureStats( 'bad_token' );
3956                                 } else {
3957                                         $note = $this->context->msg( 'session_fail_preview' )->plain();
3958                                         $this->incrementEditFailureStats( 'session_loss' );
3959                                 }
3960                         } elseif ( $this->incompleteForm ) {
3961                                 $note = $this->context->msg( 'edit_form_incomplete' )->plain();
3962                                 if ( $this->mTriedSave ) {
3963                                         $this->incrementEditFailureStats( 'incomplete_form' );
3964                                 }
3965                         } else {
3966                                 $note = $this->context->msg( 'previewnote' )->plain() . ' ' . $continueEditing;
3967                         }
3968
3969                         # don't parse non-wikitext pages, show message about preview
3970                         if ( $this->mTitle->isUserConfigPage() || $this->mTitle->isSiteConfigPage() ) {
3971                                 if ( $this->mTitle->isUserConfigPage() ) {
3972                                         $level = 'user';
3973                                 } elseif ( $this->mTitle->isSiteConfigPage() ) {
3974                                         $level = 'site';
3975                                 } else {
3976                                         $level = false;
3977                                 }
3978
3979                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3980                                         $format = 'css';
3981                                         if ( $level === 'user' && !$config->get( 'AllowUserCss' ) ) {
3982                                                 $format = false;
3983                                         }
3984                                 } elseif ( $content->getModel() == CONTENT_MODEL_JSON ) {
3985                                         $format = 'json';
3986                                         if ( $level === 'user' /* No comparable 'AllowUserJson' */ ) {
3987                                                 $format = false;
3988                                         }
3989                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3990                                         $format = 'js';
3991                                         if ( $level === 'user' && !$config->get( 'AllowUserJs' ) ) {
3992                                                 $format = false;
3993                                         }
3994                                 } else {
3995                                         $format = false;
3996                                 }
3997
3998                                 # Used messages to make sure grep find them:
3999                                 # Messages: usercsspreview, userjsonpreview, userjspreview,
4000                                 #   sitecsspreview, sitejsonpreview, sitejspreview
4001                                 if ( $level && $format ) {
4002                                         $note = "<div id='mw-{$level}{$format}preview'>" .
4003                                                 $this->context->msg( "{$level}{$format}preview" )->plain() .
4004                                                 ' ' . $continueEditing . "</div>";
4005                                 }
4006                         }
4007
4008                         # If we're adding a comment, we need to show the
4009                         # summary as the headline
4010                         if ( $this->section === "new" && $this->summary !== "" ) {
4011                                 $content = $content->addSectionHeader( $this->summary );
4012                         }
4013
4014                         $hook_args = [ $this, &$content ];
4015                         Hooks::run( 'EditPageGetPreviewContent', $hook_args );
4016
4017                         $parserResult = $this->doPreviewParse( $content );
4018                         $parserOutput = $parserResult['parserOutput'];
4019                         $previewHTML = $parserResult['html'];
4020                         $this->mParserOutput = $parserOutput;
4021                         $out->addParserOutputMetadata( $parserOutput );
4022                         if ( $out->userCanPreview() ) {
4023                                 $out->addContentOverride( $this->getTitle(), $content );
4024                         }
4025
4026                         if ( count( $parserOutput->getWarnings() ) ) {
4027                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
4028                         }
4029
4030                 } catch ( MWContentSerializationException $ex ) {
4031                         $m = $this->context->msg(
4032                                 'content-failed-to-parse',
4033                                 $this->contentModel,
4034                                 $this->contentFormat,
4035                                 $ex->getMessage()
4036                         );
4037                         $note .= "\n\n" . $m->plain(); # gets parsed down below
4038                         $previewHTML = '';
4039                 }
4040
4041                 if ( $this->isConflict ) {
4042                         $conflict = Html::rawElement(
4043                                 'h2', [ 'id' => 'mw-previewconflict' ],
4044                                 $this->context->msg( 'previewconflict' )->escaped()
4045                         );
4046                 } else {
4047                         $conflict = '<hr />';
4048                 }
4049
4050                 $previewhead = Html::rawElement(
4051                         'div', [ 'class' => 'previewnote' ],
4052                         Html::rawElement(
4053                                 'h2', [ 'id' => 'mw-previewheader' ],
4054                                 $this->context->msg( 'preview' )->escaped()
4055                         ) .
4056                         $out->parseAsInterface( $note ) . $conflict
4057                 );
4058
4059                 $pageViewLang = $this->mTitle->getPageViewLanguage();
4060                 $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
4061                         'class' => 'mw-content-' . $pageViewLang->getDir() ];
4062                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
4063
4064                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
4065         }
4066
4067         private function incrementEditFailureStats( $failureType ) {
4068                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
4069                 $stats->increment( 'edit.failures.' . $failureType );
4070         }
4071
4072         /**
4073          * Get parser options for a preview
4074          * @return ParserOptions
4075          */
4076         protected function getPreviewParserOptions() {
4077                 $parserOptions = $this->page->makeParserOptions( $this->context );
4078                 $parserOptions->setIsPreview( true );
4079                 $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
4080                 $parserOptions->enableLimitReport();
4081
4082                 // XXX: we could call $parserOptions->setCurrentRevisionCallback here to force the
4083                 // current revision to be null during PST, until setupFakeRevision is called on
4084                 // the ParserOptions. Currently, we rely on Parser::getRevisionObject() to ignore
4085                 // existing revisions in preview mode.
4086
4087                 return $parserOptions;
4088         }
4089
4090         /**
4091          * Parse the page for a preview. Subclasses may override this class, in order
4092          * to parse with different options, or to otherwise modify the preview HTML.
4093          *
4094          * @param Content $content The page content
4095          * @return array with keys:
4096          *   - parserOutput: The ParserOutput object
4097          *   - html: The HTML to be displayed
4098          */
4099         protected function doPreviewParse( Content $content ) {
4100                 $user = $this->context->getUser();
4101                 $parserOptions = $this->getPreviewParserOptions();
4102
4103                 // NOTE: preSaveTransform doesn't have a fake revision to operate on.
4104                 // Parser::getRevisionObject() will return null in preview mode,
4105                 // causing the context user to be used for {{subst:REVISIONUSER}}.
4106                 // XXX: Alternatively, we could also call setupFakeRevision() a second time:
4107                 // once before PST with $content, and then after PST with $pstContent.
4108                 $pstContent = $content->preSaveTransform( $this->mTitle, $user, $parserOptions );
4109                 $scopedCallback = $parserOptions->setupFakeRevision( $this->mTitle, $pstContent, $user );
4110                 $parserOutput = $pstContent->getParserOutput( $this->mTitle, null, $parserOptions );
4111                 ScopedCallback::consume( $scopedCallback );
4112                 return [
4113                         'parserOutput' => $parserOutput,
4114                         'html' => $parserOutput->getText( [
4115                                 'enableSectionEditLinks' => false
4116                         ] )
4117                 ];
4118         }
4119
4120         /**
4121          * @return array
4122          */
4123         public function getTemplates() {
4124                 if ( $this->preview || $this->section != '' ) {
4125                         $templates = [];
4126                         if ( !isset( $this->mParserOutput ) ) {
4127                                 return $templates;
4128                         }
4129                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
4130                                 foreach ( array_keys( $template ) as $dbk ) {
4131                                         $templates[] = Title::makeTitle( $ns, $dbk );
4132                                 }
4133                         }
4134                         return $templates;
4135                 } else {
4136                         return $this->mTitle->getTemplateLinksFrom();
4137                 }
4138         }
4139
4140         /**
4141          * Allow extensions to provide a toolbar.
4142          *
4143          * @return string|null
4144          */
4145         public static function getEditToolbar() {
4146                 $startingToolbar = '<div id="toolbar"></div>';
4147                 $toolbar = $startingToolbar;
4148
4149                 if ( !Hooks::run( 'EditPageBeforeEditToolbar', [ &$toolbar ] ) ) {
4150                         return null;
4151                 }
4152                 // Don't add a pointless `<div>` to the page unless a hook caller populated it
4153                 return ( $toolbar === $startingToolbar ) ? null : $toolbar;
4154         }
4155
4156         /**
4157          * Return an array of checkbox definitions.
4158          *
4159          * Array keys correspond to the `<input>` 'name' attribute to use for each checkbox.
4160          *
4161          * Array values are associative arrays with the following keys:
4162          *  - 'label-message' (required): message for label text
4163          *  - 'id' (required): 'id' attribute for the `<input>`
4164          *  - 'default' (required): default checkedness (true or false)
4165          *  - 'title-message' (optional): used to generate 'title' attribute for the `<label>`
4166          *  - 'tooltip' (optional): used to generate 'title' and 'accesskey' attributes
4167          *    from messages like 'tooltip-foo', 'accesskey-foo'
4168          *  - 'label-id' (optional): 'id' attribute for the `<label>`
4169          *  - 'legacy-name' (optional): short name for backwards-compatibility
4170          * @param array $checked Array of checkbox name (matching the 'legacy-name') => bool,
4171          *   where bool indicates the checked status of the checkbox
4172          * @return array[]
4173          */
4174         public function getCheckboxesDefinition( $checked ) {
4175                 $checkboxes = [];
4176
4177                 $user = $this->context->getUser();
4178                 // don't show the minor edit checkbox if it's a new page or section
4179                 $permissionManager = MediaWikiServices::getInstance()->getPermissionManager();
4180                 if ( !$this->isNew && $permissionManager->userHasRight( $user, 'minoredit' ) ) {
4181                         $checkboxes['wpMinoredit'] = [
4182                                 'id' => 'wpMinoredit',
4183                                 'label-message' => 'minoredit',
4184                                 // Uses messages: tooltip-minoredit, accesskey-minoredit
4185                                 'tooltip' => 'minoredit',
4186                                 'label-id' => 'mw-editpage-minoredit',
4187                                 'legacy-name' => 'minor',
4188                                 'default' => $checked['minor'],
4189                         ];
4190                 }
4191
4192                 if ( $user->isLoggedIn() ) {
4193                         $checkboxes['wpWatchthis'] = [
4194                                 'id' => 'wpWatchthis',
4195                                 'label-message' => 'watchthis',
4196                                 // Uses messages: tooltip-watch, accesskey-watch
4197                                 'tooltip' => 'watch',
4198                                 'label-id' => 'mw-editpage-watch',
4199                                 'legacy-name' => 'watch',
4200                                 'default' => $checked['watch'],
4201                         ];
4202                 }
4203
4204                 $editPage = $this;
4205                 Hooks::run( 'EditPageGetCheckboxesDefinition', [ $editPage, &$checkboxes ] );
4206
4207                 return $checkboxes;
4208         }
4209
4210         /**
4211          * Returns an array of checkboxes for the edit form, including 'minor' and 'watch' checkboxes and
4212          * any other added by extensions.
4213          *
4214          * @param int &$tabindex Current tabindex
4215          * @param array $checked Array of checkbox => bool, where bool indicates the checked
4216          *                 status of the checkbox
4217          *
4218          * @return array Associative array of string keys to OOUI\FieldLayout instances
4219          */
4220         public function getCheckboxesWidget( &$tabindex, $checked ) {
4221                 $checkboxes = [];
4222                 $checkboxesDef = $this->getCheckboxesDefinition( $checked );
4223
4224                 foreach ( $checkboxesDef as $name => $options ) {
4225                         $legacyName = $options['legacy-name'] ?? $name;
4226
4227                         $title = null;
4228                         $accesskey = null;
4229                         if ( isset( $options['tooltip'] ) ) {
4230                                 $accesskey = $this->context->msg( "accesskey-{$options['tooltip']}" )->text();
4231                                 $title = Linker::titleAttrib( $options['tooltip'] );
4232                         }
4233                         if ( isset( $options['title-message'] ) ) {
4234                                 $title = $this->context->msg( $options['title-message'] )->text();
4235                         }
4236
4237                         $checkboxes[ $legacyName ] = new OOUI\FieldLayout(
4238                                 new OOUI\CheckboxInputWidget( [
4239                                         'tabIndex' => ++$tabindex,
4240                                         'accessKey' => $accesskey,
4241                                         'id' => $options['id'] . 'Widget',
4242                                         'inputId' => $options['id'],
4243                                         'name' => $name,
4244                                         'selected' => $options['default'],
4245                                         'infusable' => true,
4246                                 ] ),
4247                                 [
4248                                         'align' => 'inline',
4249                                         'label' => new OOUI\HtmlSnippet( $this->context->msg( $options['label-message'] )->parse() ),
4250                                         'title' => $title,
4251                                         'id' => $options['label-id'] ?? null,
4252                                 ]
4253                         );
4254                 }
4255
4256                 return $checkboxes;
4257         }
4258
4259         /**
4260          * Get the message key of the label for the button to save the page
4261          *
4262          * @since 1.30
4263          * @return string
4264          */
4265         protected function getSubmitButtonLabel() {
4266                 $labelAsPublish =
4267                         $this->context->getConfig()->get( 'EditSubmitButtonLabelPublish' );
4268
4269                 // Can't use $this->isNew as that's also true if we're adding a new section to an extant page
4270                 $newPage = !$this->mTitle->exists();
4271
4272                 if ( $labelAsPublish ) {
4273                         $buttonLabelKey = $newPage ? 'publishpage' : 'publishchanges';
4274                 } else {
4275                         $buttonLabelKey = $newPage ? 'savearticle' : 'savechanges';
4276                 }
4277
4278                 return $buttonLabelKey;
4279         }
4280
4281         /**
4282          * Returns an array of html code of the following buttons:
4283          * save, diff and preview
4284          *
4285          * @param int &$tabindex Current tabindex
4286          *
4287          * @return array
4288          */
4289         public function getEditButtons( &$tabindex ) {
4290                 $buttons = [];
4291
4292                 $labelAsPublish =
4293                         $this->context->getConfig()->get( 'EditSubmitButtonLabelPublish' );
4294
4295                 $buttonLabel = $this->context->msg( $this->getSubmitButtonLabel() )->text();
4296                 $buttonTooltip = $labelAsPublish ? 'publish' : 'save';
4297
4298                 $buttons['save'] = new OOUI\ButtonInputWidget( [
4299                         'name' => 'wpSave',
4300                         'tabIndex' => ++$tabindex,
4301                         'id' => 'wpSaveWidget',
4302                         'inputId' => 'wpSave',
4303                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4304                         'useInputTag' => true,
4305                         'flags' => [ 'progressive', 'primary' ],
4306                         'label' => $buttonLabel,
4307                         'infusable' => true,
4308                         'type' => 'submit',
4309                         // Messages used: tooltip-save, tooltip-publish
4310                         'title' => Linker::titleAttrib( $buttonTooltip ),
4311                         // Messages used: accesskey-save, accesskey-publish
4312                         'accessKey' => Linker::accesskey( $buttonTooltip ),
4313                 ] );
4314
4315                 $buttons['preview'] = new OOUI\ButtonInputWidget( [
4316                         'name' => 'wpPreview',
4317                         'tabIndex' => ++$tabindex,
4318                         'id' => 'wpPreviewWidget',
4319                         'inputId' => 'wpPreview',
4320                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4321                         'useInputTag' => true,
4322                         'label' => $this->context->msg( 'showpreview' )->text(),
4323                         'infusable' => true,
4324                         'type' => 'submit',
4325                         // Message used: tooltip-preview
4326                         'title' => Linker::titleAttrib( 'preview' ),
4327                         // Message used: accesskey-preview
4328                         'accessKey' => Linker::accesskey( 'preview' ),
4329                 ] );
4330
4331                 $buttons['diff'] = new OOUI\ButtonInputWidget( [
4332                         'name' => 'wpDiff',
4333                         'tabIndex' => ++$tabindex,
4334                         'id' => 'wpDiffWidget',
4335                         'inputId' => 'wpDiff',
4336                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4337                         'useInputTag' => true,
4338                         'label' => $this->context->msg( 'showdiff' )->text(),
4339                         'infusable' => true,
4340                         'type' => 'submit',
4341                         // Message used: tooltip-diff
4342                         'title' => Linker::titleAttrib( 'diff' ),
4343                         // Message used: accesskey-diff
4344                         'accessKey' => Linker::accesskey( 'diff' ),
4345                 ] );
4346
4347                 // Avoid PHP 7.1 warning of passing $this by reference
4348                 $editPage = $this;
4349                 Hooks::run( 'EditPageBeforeEditButtons', [ &$editPage, &$buttons, &$tabindex ] );
4350
4351                 return $buttons;
4352         }
4353
4354         /**
4355          * Creates a basic error page which informs the user that
4356          * they have attempted to edit a nonexistent section.
4357          */
4358         public function noSuchSectionPage() {
4359                 $out = $this->context->getOutput();
4360                 $out->prepareErrorPage( $this->context->msg( 'nosuchsectiontitle' ) );
4361
4362                 $res = $this->context->msg( 'nosuchsectiontext', $this->section )->parseAsBlock();
4363
4364                 // Avoid PHP 7.1 warning of passing $this by reference
4365                 $editPage = $this;
4366                 Hooks::run( 'EditPageNoSuchSection', [ &$editPage, &$res ] );
4367                 $out->addHTML( $res );
4368
4369                 $out->returnToMain( false, $this->mTitle );
4370         }
4371
4372         /**
4373          * Show "your edit contains spam" page with your diff and text
4374          *
4375          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
4376          */
4377         public function spamPageWithContent( $match = false ) {
4378                 $this->textbox2 = $this->textbox1;
4379
4380                 if ( is_array( $match ) ) {
4381                         $match = $this->context->getLanguage()->listToText( $match );
4382                 }
4383                 $out = $this->context->getOutput();
4384                 $out->prepareErrorPage( $this->context->msg( 'spamprotectiontitle' ) );
4385
4386                 $out->addHTML( '<div id="spamprotected">' );
4387                 $out->addWikiMsg( 'spamprotectiontext' );
4388                 if ( $match ) {
4389                         $out->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
4390                 }
4391                 $out->addHTML( '</div>' );
4392
4393                 $out->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
4394                 $this->showDiff();
4395
4396                 $out->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
4397                 $this->showTextbox2();
4398
4399                 $out->addReturnTo( $this->getContextTitle(), [ 'action' => 'edit' ] );
4400         }
4401
4402         /**
4403          * @since 1.29
4404          */
4405         protected function addEditNotices() {
4406                 $out = $this->context->getOutput();
4407                 $editNotices = $this->mTitle->getEditNotices( $this->oldid );
4408                 if ( count( $editNotices ) ) {
4409                         $out->addHTML( implode( "\n", $editNotices ) );
4410                 } else {
4411                         $msg = $this->context->msg( 'editnotice-notext' );
4412                         if ( !$msg->isDisabled() ) {
4413                                 $out->addHTML(
4414                                         '<div class="mw-editnotice-notext">'
4415                                         . $msg->parseAsBlock()
4416                                         . '</div>'
4417                                 );
4418                         }
4419                 }
4420         }
4421
4422         /**
4423          * @since 1.29
4424          */
4425         protected function addTalkPageText() {
4426                 if ( $this->mTitle->isTalkPage() ) {
4427                         $this->context->getOutput()->addWikiMsg( 'talkpagetext' );
4428                 }
4429         }
4430
4431         /**
4432          * @since 1.29
4433          */
4434         protected function addLongPageWarningHeader() {
4435                 if ( $this->contentLength === false ) {
4436                         $this->contentLength = strlen( $this->textbox1 );
4437                 }
4438
4439                 $out = $this->context->getOutput();
4440                 $lang = $this->context->getLanguage();
4441                 $maxArticleSize = $this->context->getConfig()->get( 'MaxArticleSize' );
4442                 if ( $this->tooBig || $this->contentLength > $maxArticleSize * 1024 ) {
4443                         $out->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
4444                                 [
4445                                         'longpageerror',
4446                                         $lang->formatNum( round( $this->contentLength / 1024, 3 ) ),
4447                                         $lang->formatNum( $maxArticleSize )
4448                                 ]
4449                         );
4450                 } elseif ( !$this->context->msg( 'longpage-hint' )->isDisabled() ) {
4451                         $out->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
4452                                 [
4453                                         'longpage-hint',
4454                                         $lang->formatSize( strlen( $this->textbox1 ) ),
4455                                         strlen( $this->textbox1 )
4456                                 ]
4457                         );
4458                 }
4459         }
4460
4461         /**
4462          * @since 1.29
4463          */
4464         protected function addPageProtectionWarningHeaders() {
4465                 $out = $this->context->getOutput();
4466                 if ( $this->mTitle->isProtected( 'edit' ) &&
4467                         MediaWikiServices::getInstance()->getPermissionManager()->getNamespaceRestrictionLevels(
4468                                 $this->getTitle()->getNamespace()
4469                         ) !== [ '' ]
4470                 ) {
4471                         # Is the title semi-protected?
4472                         if ( $this->mTitle->isSemiProtected() ) {
4473                                 $noticeMsg = 'semiprotectedpagewarning';
4474                         } else {
4475                                 # Then it must be protected based on static groups (regular)
4476                                 $noticeMsg = 'protectedpagewarning';
4477                         }
4478                         LogEventsList::showLogExtract( $out, 'protect', $this->mTitle, '',
4479                                 [ 'lim' => 1, 'msgKey' => [ $noticeMsg ] ] );
4480                 }
4481                 if ( $this->mTitle->isCascadeProtected() ) {
4482                         # Is this page under cascading protection from some source pages?
4483                         /** @var Title[] $cascadeSources */
4484                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
4485                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
4486                         $cascadeSourcesCount = count( $cascadeSources );
4487                         if ( $cascadeSourcesCount > 0 ) {
4488                                 # Explain, and list the titles responsible
4489                                 foreach ( $cascadeSources as $page ) {
4490                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
4491                                 }
4492                         }
4493                         $notice .= '</div>';
4494                         $out->wrapWikiMsg( $notice, [ 'cascadeprotectedwarning', $cascadeSourcesCount ] );
4495                 }
4496                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
4497                         LogEventsList::showLogExtract( $out, 'protect', $this->mTitle, '',
4498                                 [ 'lim' => 1,
4499                                         'showIfEmpty' => false,
4500                                         'msgKey' => [ 'titleprotectedwarning' ],
4501                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ] );
4502                 }
4503         }
4504
4505         /**
4506          * @param OutputPage $out
4507          * @since 1.29
4508          */
4509         protected function addExplainConflictHeader( OutputPage $out ) {
4510                 $out->addHTML(
4511                         $this->getEditConflictHelper()->getExplainHeader()
4512                 );
4513         }
4514
4515         /**
4516          * @param string $name
4517          * @param mixed[] $customAttribs
4518          * @param User $user
4519          * @return mixed[]
4520          * @since 1.29
4521          */
4522         protected function buildTextboxAttribs( $name, array $customAttribs, User $user ) {
4523                 return ( new TextboxBuilder() )->buildTextboxAttribs(
4524                         $name, $customAttribs, $user, $this->mTitle
4525                 );
4526         }
4527
4528         /**
4529          * @param string $wikitext
4530          * @return string
4531          * @since 1.29
4532          */
4533         protected function addNewLineAtEnd( $wikitext ) {
4534                 return ( new TextboxBuilder() )->addNewLineAtEnd( $wikitext );
4535         }
4536
4537         /**
4538          * Turns section name wikitext into anchors for use in HTTP redirects. Various
4539          * versions of Microsoft browsers misinterpret fragment encoding of Location: headers
4540          * resulting in mojibake in address bar. Redirect them to legacy section IDs,
4541          * if possible. All the other browsers get HTML5 if the wiki is configured for it, to
4542          * spread the new style links more efficiently.
4543          *
4544          * @param string $text
4545          * @return string
4546          */
4547         private function guessSectionName( $text ) {
4548                 // Detect Microsoft browsers
4549                 $userAgent = $this->context->getRequest()->getHeader( 'User-Agent' );
4550                 $parser = MediaWikiServices::getInstance()->getParser();
4551                 if ( $userAgent && preg_match( '/MSIE|Edge/', $userAgent ) ) {
4552                         // ...and redirect them to legacy encoding, if available
4553                         return $parser->guessLegacySectionNameFromWikiText( $text );
4554                 }
4555                 // Meanwhile, real browsers get real anchors
4556                 $name = $parser->guessSectionNameFromWikiText( $text );
4557                 // With one little caveat: per T216029, fragments in HTTP redirects need to be urlencoded,
4558                 // otherwise Chrome double-escapes the rest of the URL.
4559                 return '#' . urlencode( mb_substr( $name, 1 ) );
4560         }
4561
4562         /**
4563          * Set a factory function to create an EditConflictHelper
4564          *
4565          * @param callable $factory Factory function
4566          * @since 1.31
4567          */
4568         public function setEditConflictHelperFactory( callable $factory ) {
4569                 $this->editConflictHelperFactory = $factory;
4570                 $this->editConflictHelper = null;
4571         }
4572
4573         /**
4574          * @return TextConflictHelper
4575          */
4576         private function getEditConflictHelper() {
4577                 if ( !$this->editConflictHelper ) {
4578                         $this->editConflictHelper = call_user_func(
4579                                 $this->editConflictHelperFactory,
4580                                 $this->getSubmitButtonLabel()
4581                         );
4582                 }
4583
4584                 return $this->editConflictHelper;
4585         }
4586
4587         /**
4588          * @param string $submitButtonLabel
4589          * @return TextConflictHelper
4590          */
4591         private function newTextConflictHelper( $submitButtonLabel ) {
4592                 return new TextConflictHelper(
4593                         $this->getTitle(),
4594                         $this->getContext()->getOutput(),
4595                         MediaWikiServices::getInstance()->getStatsdDataFactory(),
4596                         $submitButtonLabel
4597                 );
4598         }
4599 }