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\EditPage\TextboxBuilder;
  24 use MediaWiki\EditPage\TextConflictHelper;
  25 use MediaWiki\Logger\LoggerFactory;
  26 use MediaWiki\MediaWikiServices;
  27 use Wikimedia\ScopedCallback;
  28
  29 /**
  30  * The edit page/HTML interface (split from Article)
  31  * The actual database and text munging is still in Article,
  32  * but it should get easier to call those from alternate
  33  * interfaces.
  34  *
  35  * EditPage cares about two distinct titles:
  36  * $this->mContextTitle is the page that forms submit to, links point to,
  37  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  38  * page in the database that is actually being edited. These are
  39  * usually the same, but they are now allowed to be different.
  40  *
  41  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  42  * headaches, which may be fatal.
  43  */
  44 class EditPage {
  45         /**
  46          * Used for Unicode support checks
  47          */
  48         const UNICODE_CHECK = 'ℳ𝒲♥𝓊𝓃𝒾𝒸ℴ𝒹ℯ';
  49
  50         /**
  51          * Status: Article successfully updated
  52          */
  53         const AS_SUCCESS_UPDATE = 200;
  54
  55         /**
  56          * Status: Article successfully created
  57          */
  58         const AS_SUCCESS_NEW_ARTICLE = 201;
  59
  60         /**
  61          * Status: Article update aborted by a hook function
  62          */
  63         const AS_HOOK_ERROR = 210;
  64
  65         /**
  66          * Status: A hook function returned an error
  67          */
  68         const AS_HOOK_ERROR_EXPECTED = 212;
  69
  70         /**
  71          * Status: User is blocked from editing this page
  72          */
  73         const AS_BLOCKED_PAGE_FOR_USER = 215;
  74
  75         /**
  76          * Status: Content too big (> $wgMaxArticleSize)
  77          */
  78         const AS_CONTENT_TOO_BIG = 216;
  79
  80         /**
  81          * Status: this anonymous user is not allowed to edit this page
  82          */
  83         const AS_READ_ONLY_PAGE_ANON = 218;
  84
  85         /**
  86          * Status: this logged in user is not allowed to edit this page
  87          */
  88         const AS_READ_ONLY_PAGE_LOGGED = 219;
  89
  90         /**
  91          * Status: wiki is in readonly mode (wfReadOnly() == true)
  92          */
  93         const AS_READ_ONLY_PAGE = 220;
  94
  95         /**
  96          * Status: rate limiter for action 'edit' was tripped
  97          */
  98         const AS_RATE_LIMITED = 221;
  99
 100         /**
 101          * Status: article was deleted while editing and param wpRecreate == false or form
 102          * was not posted
 103          */
 104         const AS_ARTICLE_WAS_DELETED = 222;
 105
 106         /**
 107          * Status: user tried to create this page, but is not allowed to do that
 108          * ( Title->userCan('create') == false )
 109          */
 110         const AS_NO_CREATE_PERMISSION = 223;
 111
 112         /**
 113          * Status: user tried to create a blank page and wpIgnoreBlankArticle == false
 114          */
 115         const AS_BLANK_ARTICLE = 224;
 116
 117         /**
 118          * Status: (non-resolvable) edit conflict
 119          */
 120         const AS_CONFLICT_DETECTED = 225;
 121
 122         /**
 123          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 124          * editing in his own userspace or talkspace and wpIgnoreBlankSummary == false
 125          */
 126         const AS_SUMMARY_NEEDED = 226;
 127
 128         /**
 129          * Status: user tried to create a new section without content
 130          */
 131         const AS_TEXTBOX_EMPTY = 228;
 132
 133         /**
 134          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 135          */
 136         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 137
 138         /**
 139          * Status: WikiPage::doEdit() was unsuccessful
 140          */
 141         const AS_END = 231;
 142
 143         /**
 144          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 145          */
 146         const AS_SPAM_ERROR = 232;
 147
 148         /**
 149          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 150          */
 151         const AS_IMAGE_REDIRECT_ANON = 233;
 152
 153         /**
 154          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 155          */
 156         const AS_IMAGE_REDIRECT_LOGGED = 234;
 157
 158         /**
 159          * Status: user tried to modify the content model, but is not allowed to do that
 160          * ( User::isAllowed('editcontentmodel') == false )
 161          */
 162         const AS_NO_CHANGE_CONTENT_MODEL = 235;
 163
 164         /**
 165          * Status: user tried to create self-redirect (redirect to the same article) and
 166          * wpIgnoreSelfRedirect == false
 167          */
 168         const AS_SELF_REDIRECT = 236;
 169
 170         /**
 171          * Status: an error relating to change tagging. Look at the message key for
 172          * more details
 173          */
 174         const AS_CHANGE_TAG_ERROR = 237;
 175
 176         /**
 177          * Status: can't parse content
 178          */
 179         const AS_PARSE_ERROR = 240;
 180
 181         /**
 182          * Status: when changing the content model is disallowed due to
 183          * $wgContentHandlerUseDB being false
 184          */
 185         const AS_CANNOT_USE_CUSTOM_MODEL = 241;
 186
 187         /**
 188          * Status: edit rejected because browser doesn't support Unicode.
 189          */
 190         const AS_UNICODE_NOT_SUPPORTED = 242;
 191
 192         /**
 193          * HTML id and name for the beginning of the edit form.
 194          */
 195         const EDITFORM_ID = 'editform';
 196
 197         /**
 198          * Prefix of key for cookie used to pass post-edit state.
 199          * The revision id edited is added after this
 200          */
 201         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 202
 203         /**
 204          * Duration of PostEdit cookie, in seconds.
 205          * The cookie will be removed instantly if the JavaScript runs.
 206          *
 207          * Otherwise, though, we don't want the cookies to accumulate.
 208          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible
 209          * limit of only 20 cookies per domain. This still applies at least to some
 210          * versions of IE without full updates:
 211          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 212          *
 213          * A value of 20 minutes should be enough to take into account slow loads and minor
 214          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 215          */
 216         const POST_EDIT_COOKIE_DURATION = 1200;
 217
 218         /**
 219          * @deprecated for public usage since 1.30 use EditPage::getArticle()
 220          * @var Article
 221          */
 222         public $mArticle;
 223         /** @var WikiPage */
 224         private $page;
 225
 226         /**
 227          * @deprecated for public usage since 1.30 use EditPage::getTitle()
 228          * @var Title
 229          */
 230         public $mTitle;
 231
 232         /** @var null|Title */
 233         private $mContextTitle = null;
 234
 235         /** @var string */
 236         public $action = 'submit';
 237
 238         /** @var bool */
 239         public $isConflict = false;
 240
 241         /** @var bool New page or new section */
 242         public $isNew = false;
 243
 244         /** @var bool */
 245         public $deletedSinceEdit;
 246
 247         /** @var string */
 248         public $formtype;
 249
 250         /** @var bool */
 251         public $firsttime;
 252
 253         /** @var bool|stdClass */
 254         public $lastDelete;
 255
 256         /** @var bool */
 257         public $mTokenOk = false;
 258
 259         /** @var bool */
 260         public $mTokenOkExceptSuffix = false;
 261
 262         /** @var bool */
 263         public $mTriedSave = false;
 264
 265         /** @var bool */
 266         public $incompleteForm = false;
 267
 268         /** @var bool */
 269         public $tooBig = false;
 270
 271         /** @var bool */
 272         public $missingComment = false;
 273
 274         /** @var bool */
 275         public $missingSummary = false;
 276
 277         /** @var bool */
 278         public $allowBlankSummary = false;
 279
 280         /** @var bool */
 281         protected $blankArticle = false;
 282
 283         /** @var bool */
 284         protected $allowBlankArticle = false;
 285
 286         /** @var bool */
 287         protected $selfRedirect = false;
 288
 289         /** @var bool */
 290         protected $allowSelfRedirect = false;
 291
 292         /** @var string */
 293         public $autoSumm = '';
 294
 295         /** @var string */
 296         public $hookError = '';
 297
 298         /** @var ParserOutput */
 299         public $mParserOutput;
 300
 301         /** @var bool Has a summary been preset using GET parameter &summary= ? */
 302         public $hasPresetSummary = false;
 303
 304         /** @var Revision|bool|null */
 305         public $mBaseRevision = false;
 306
 307         /** @var bool */
 308         public $mShowSummaryField = true;
 309
 310         # Form values
 311
 312         /** @var bool */
 313         public $save = false;
 314
 315         /** @var bool */
 316         public $preview = false;
 317
 318         /** @var bool */
 319         public $diff = false;
 320
 321         /** @var bool */
 322         public $minoredit = false;
 323
 324         /** @var bool */
 325         public $watchthis = false;
 326
 327         /** @var bool */
 328         public $recreate = false;
 329
 330         /** @var string */
 331         public $textbox1 = '';
 332
 333         /** @var string */
 334         public $textbox2 = '';
 335
 336         /** @var string */
 337         public $summary = '';
 338
 339         /** @var bool */
 340         public $nosummary = false;
 341
 342         /** @var string */
 343         public $edittime = '';
 344
 345         /** @var int */
 346         private $editRevId = null;
 347
 348         /** @var string */
 349         public $section = '';
 350
 351         /** @var string */
 352         public $sectiontitle = '';
 353
 354         /** @var string */
 355         public $starttime = '';
 356
 357         /** @var int */
 358         public $oldid = 0;
 359
 360         /** @var int */
 361         public $parentRevId = 0;
 362
 363         /** @var string */
 364         public $editintro = '';
 365
 366         /** @var null */
 367         public $scrolltop = null;
 368
 369         /** @var bool */
 370         public $bot = true;
 371
 372         /** @var string */
 373         public $contentModel;
 374
 375         /** @var null|string */
 376         public $contentFormat = null;
 377
 378         /** @var null|array */
 379         private $changeTags = null;
 380
 381         # Placeholders for text injection by hooks (must be HTML)
 382         # extensions should take care to _append_ to the present value
 383
 384         /** @var string Before even the preview */
 385         public $editFormPageTop = '';
 386         public $editFormTextTop = '';
 387         public $editFormTextBeforeContent = '';
 388         public $editFormTextAfterWarn = '';
 389         public $editFormTextAfterTools = '';
 390         public $editFormTextBottom = '';
 391         public $editFormTextAfterContent = '';
 392         public $previewTextAfterContent = '';
 393         public $mPreloadContent = null;
 394
 395         /* $didSave should be set to true whenever an article was successfully altered. */
 396         public $didSave = false;
 397         public $undidRev = 0;
 398
 399         public $suppressIntro = false;
 400
 401         /** @var bool */
 402         protected $edit;
 403
 404         /** @var bool|int */
 405         protected $contentLength = false;
 406
 407         /**
 408          * @var bool Set in ApiEditPage, based on ContentHandler::allowsDirectApiEditing
 409          */
 410         private $enableApiEditOverride = false;
 411
 412         /**
 413          * @var IContextSource
 414          */
 415         protected $context;
 416
 417         /**
 418          * @var bool Whether an old revision is edited
 419          */
 420         private $isOldRev = false;
 421
 422         /**
 423          * @var string|null What the user submitted in the 'wpUnicodeCheck' field
 424          */
 425         private $unicodeCheck;
 426
 427         /**
 428          * Factory function to create an edit conflict helper
 429          *
 430          * @var callable
 431          */
 432         private $editConflictHelperFactory;
 433
 434         /**
 435          * @var TextConflictHelper|null
 436          */
 437         private $editConflictHelper;
 438
 439         /**
 440          * @param Article $article
 441          */
 442         public function __construct( Article $article ) {
 443                 $this->mArticle = $article;
 444                 $this->page = $article->getPage(); // model object
 445                 $this->mTitle = $article->getTitle();
 446                 $this->context = $article->getContext();
 447
 448                 $this->contentModel = $this->mTitle->getContentModel();
 449
 450                 $handler = ContentHandler::getForModelID( $this->contentModel );
 451                 $this->contentFormat = $handler->getDefaultFormat();
 452                 $this->editConflictHelperFactory = [ $this, 'newTextConflictHelper' ];
 453         }
 454
 455         /**
 456          * @return Article
 457          */
 458         public function getArticle() {
 459                 return $this->mArticle;
 460         }
 461
 462         /**
 463          * @since 1.28
 464          * @return IContextSource
 465          */
 466         public function getContext() {
 467                 return $this->context;
 468         }
 469
 470         /**
 471          * @since 1.19
 472          * @return Title
 473          */
 474         public function getTitle() {
 475                 return $this->mTitle;
 476         }
 477
 478         /**
 479          * Set the context Title object
 480          *
 481          * @param Title|null $title Title object or null
 482          */
 483         public function setContextTitle( $title ) {
 484                 $this->mContextTitle = $title;
 485         }
 486
 487         /**
 488          * Get the context title object.
 489          * If not set, $wgTitle will be returned. This behavior might change in
 490          * the future to return $this->mTitle instead.
 491          *
 492          * @return Title
 493          */
 494         public function getContextTitle() {
 495                 if ( is_null( $this->mContextTitle ) ) {
 496                         wfDebugLog(
 497                                 'GlobalTitleFail',
 498                                 __METHOD__ . ' called by ' . wfGetAllCallers( 5 ) . ' with no title set.'
 499                         );
 500                         global $wgTitle;
 501                         return $wgTitle;
 502                 } else {
 503                         return $this->mContextTitle;
 504                 }
 505         }
 506
 507         /**
 508          * Check if the edit page is using OOUI controls
 509          * @return bool Always true
 510          * @deprecated since 1.30
 511          */
 512         public function isOouiEnabled() {
 513                 wfDeprecated( __METHOD__, '1.30' );
 514                 return true;
 515         }
 516
 517         /**
 518          * Returns if the given content model is editable.
 519          *
 520          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 521          * @return bool
 522          * @throws MWException If $modelId has no known handler
 523          */
 524         public function isSupportedContentModel( $modelId ) {
 525                 return $this->enableApiEditOverride === true ||
 526                         ContentHandler::getForModelID( $modelId )->supportsDirectEditing();
 527         }
 528
 529         /**
 530          * Allow editing of content that supports API direct editing, but not general
 531          * direct editing. Set to false by default.
 532          *
 533          * @param bool $enableOverride
 534          */
 535         public function setApiEditOverride( $enableOverride ) {
 536                 $this->enableApiEditOverride = $enableOverride;
 537         }
 538
 539         /**
 540          * @deprecated since 1.29, call edit directly
 541          */
 542         public function submit() {
 543                 wfDeprecated( __METHOD__, '1.29' );
 544                 $this->edit();
 545         }
 546
 547         /**
 548          * This is the function that gets called for "action=edit". It
 549          * sets up various member variables, then passes execution to
 550          * another function, usually showEditForm()
 551          *
 552          * The edit form is self-submitting, so that when things like
 553          * preview and edit conflicts occur, we get the same form back
 554          * with the extra stuff added.  Only when the final submission
 555          * is made and all is well do we actually save and redirect to
 556          * the newly-edited page.
 557          */
 558         public function edit() {
 559                 // Allow extensions to modify/prevent this form or submission
 560                 if ( !Hooks::run( 'AlternateEdit', [ $this ] ) ) {
 561                         return;
 562                 }
 563
 564                 wfDebug( __METHOD__ . ": enter\n" );
 565
 566                 $request = $this->context->getRequest();
 567                 // If they used redlink=1 and the page exists, redirect to the main article
 568                 if ( $request->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 569                         $this->context->getOutput()->redirect( $this->mTitle->getFullURL() );
 570                         return;
 571                 }
 572
 573                 $this->importFormData( $request );
 574                 $this->firsttime = false;
 575
 576                 if ( wfReadOnly() && $this->save ) {
 577                         // Force preview
 578                         $this->save = false;
 579                         $this->preview = true;
 580                 }
 581
 582                 if ( $this->save ) {
 583                         $this->formtype = 'save';
 584                 } elseif ( $this->preview ) {
 585                         $this->formtype = 'preview';
 586                 } elseif ( $this->diff ) {
 587                         $this->formtype = 'diff';
 588                 } else { # First time through
 589                         $this->firsttime = true;
 590                         if ( $this->previewOnOpen() ) {
 591                                 $this->formtype = 'preview';
 592                         } else {
 593                                 $this->formtype = 'initial';
 594                         }
 595                 }
 596
 597                 $permErrors = $this->getEditPermissionErrors( $this->save ? 'secure' : 'full' );
 598                 if ( $permErrors ) {
 599                         wfDebug( __METHOD__ . ": User can't edit\n" );
 600                         // Auto-block user's IP if the account was "hard" blocked
 601                         if ( !wfReadOnly() ) {
 602                                 DeferredUpdates::addCallableUpdate( function () {
 603                                         $this->context->getUser()->spreadAnyEditBlock();
 604                                 } );
 605                         }
 606                         $this->displayPermissionsError( $permErrors );
 607
 608                         return;
 609                 }
 610
 611                 $revision = $this->mArticle->getRevisionFetched();
 612                 // Disallow editing revisions with content models different from the current one
 613                 // Undo edits being an exception in order to allow reverting content model changes.
 614                 if ( $revision
 615                         && $revision->getContentModel() !== $this->contentModel
 616                 ) {
 617                         $prevRev = null;
 618                         if ( $this->undidRev ) {
 619                                 $undidRevObj = Revision::newFromId( $this->undidRev );
 620                                 $prevRev = $undidRevObj ? $undidRevObj->getPrevious() : null;
 621                         }
 622                         if ( !$this->undidRev
 623                                 || !$prevRev
 624                                 || $prevRev->getContentModel() !== $this->contentModel
 625                         ) {
 626                                 $this->displayViewSourcePage(
 627                                         $this->getContentObject(),
 628                                         $this->context->msg(
 629                                                 'contentmodelediterror',
 630                                                 $revision->getContentModel(),
 631                                                 $this->contentModel
 632                                         )->plain()
 633                                 );
 634                                 return;
 635                         }
 636                 }
 637
 638                 $this->isConflict = false;
 639
 640                 # Show applicable editing introductions
 641                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 642                         $this->showIntro();
 643                 }
 644
 645                 # Attempt submission here.  This will check for edit conflicts,
 646                 # and redundantly check for locked database, blocked IPs, etc.
 647                 # that edit() already checked just in case someone tries to sneak
 648                 # in the back door with a hand-edited submission URL.
 649
 650                 if ( 'save' == $this->formtype ) {
 651                         $resultDetails = null;
 652                         $status = $this->attemptSave( $resultDetails );
 653                         if ( !$this->handleStatus( $status, $resultDetails ) ) {
 654                                 return;
 655                         }
 656                 }
 657
 658                 # First time through: get contents, set time for conflict
 659                 # checking, etc.
 660                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 661                         if ( $this->initialiseForm() === false ) {
 662                                 $this->noSuchSectionPage();
 663                                 return;
 664                         }
 665
 666                         if ( !$this->mTitle->getArticleID() ) {
 667                                 Hooks::run( 'EditFormPreloadText', [ &$this->textbox1, &$this->mTitle ] );
 668                         } else {
 669                                 Hooks::run( 'EditFormInitialText', [ $this ] );
 670                         }
 671
 672                 }
 673
 674                 $this->showEditForm();
 675         }
 676
 677         /**
 678          * @param string $rigor Same format as Title::getUserPermissionErrors()
 679          * @return array
 680          */
 681         protected function getEditPermissionErrors( $rigor = 'secure' ) {
 682                 $user = $this->context->getUser();
 683                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $user, $rigor );
 684                 # Can this title be created?
 685                 if ( !$this->mTitle->exists() ) {
 686                         $permErrors = array_merge(
 687                                 $permErrors,
 688                                 wfArrayDiff2(
 689                                         $this->mTitle->getUserPermissionsErrors( 'create', $user, $rigor ),
 690                                         $permErrors
 691                                 )
 692                         );
 693                 }
 694                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 695                 $remove = [];
 696                 foreach ( $permErrors as $error ) {
 697                         if ( ( $this->preview || $this->diff )
 698                                 && (
 699                                         $error[0] == 'blockedtext' ||
 700                                         $error[0] == 'autoblockedtext' ||
 701                                         $error[0] == 'systemblockedtext'
 702                                 )
 703                         ) {
 704                                 $remove[] = $error;
 705                         }
 706                 }
 707                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 708
 709                 return $permErrors;
 710         }
 711
 712         /**
 713          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 714          * but with the following differences:
 715          * - If redlink=1, the user will be redirected to the page
 716          * - If there is content to display or the error occurs while either saving,
 717          *   previewing or showing the difference, it will be a
 718          *   "View source for ..." page displaying the source code after the error message.
 719          *
 720          * @since 1.19
 721          * @param array $permErrors Array of permissions errors, as returned by
 722          *    Title::getUserPermissionsErrors().
 723          * @throws PermissionsError
 724          */
 725         protected function displayPermissionsError( array $permErrors ) {
 726                 $out = $this->context->getOutput();
 727                 if ( $this->context->getRequest()->getBool( 'redlink' ) ) {
 728                         // The edit page was reached via a red link.
 729                         // Redirect to the article page and let them click the edit tab if
 730                         // they really want a permission error.
 731                         $out->redirect( $this->mTitle->getFullURL() );
 732                         return;
 733                 }
 734
 735                 $content = $this->getContentObject();
 736
 737                 # Use the normal message if there's nothing to display
 738                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 739                         $action = $this->mTitle->exists() ? 'edit' :
 740                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 741                         throw new PermissionsError( $action, $permErrors );
 742                 }
 743
 744                 $this->displayViewSourcePage(
 745                         $content,
 746                         $out->formatPermissionsErrorMessage( $permErrors, 'edit' )
 747                 );
 748         }
 749
 750         /**
 751          * Display a read-only View Source page
 752          * @param Content $content
 753          * @param string $errorMessage additional wikitext error message to display
 754          */
 755         protected function displayViewSourcePage( Content $content, $errorMessage = '' ) {
 756                 $out = $this->context->getOutput();
 757                 Hooks::run( 'EditPage::showReadOnlyForm:initial', [ $this, &$out ] );
 758
 759                 $out->setRobotPolicy( 'noindex,nofollow' );
 760                 $out->setPageTitle( $this->context->msg(
 761                         'viewsource-title',
 762                         $this->getContextTitle()->getPrefixedText()
 763                 ) );
 764                 $out->addBacklinkSubtitle( $this->getContextTitle() );
 765                 $out->addHTML( $this->editFormPageTop );
 766                 $out->addHTML( $this->editFormTextTop );
 767
 768                 if ( $errorMessage !== '' ) {
 769                         $out->addWikiText( $errorMessage );
 770                         $out->addHTML( "<hr />\n" );
 771                 }
 772
 773                 # If the user made changes, preserve them when showing the markup
 774                 # (This happens when a user is blocked during edit, for instance)
 775                 if ( !$this->firsttime ) {
 776                         $text = $this->textbox1;
 777                         $out->addWikiMsg( 'viewyourtext' );
 778                 } else {
 779                         try {
 780                                 $text = $this->toEditText( $content );
 781                         } catch ( MWException $e ) {
 782                                 # Serialize using the default format if the content model is not supported
 783                                 # (e.g. for an old revision with a different model)
 784                                 $text = $content->serialize();
 785                         }
 786                         $out->addWikiMsg( 'viewsourcetext' );
 787                 }
 788
 789                 $out->addHTML( $this->editFormTextBeforeContent );
 790                 $this->showTextbox( $text, 'wpTextbox1', [ 'readonly' ] );
 791                 $out->addHTML( $this->editFormTextAfterContent );
 792
 793                 $out->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
 794
 795                 $out->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 796
 797                 $out->addHTML( $this->editFormTextBottom );
 798                 if ( $this->mTitle->exists() ) {
 799                         $out->returnToMain( null, $this->mTitle );
 800                 }
 801         }
 802
 803         /**
 804          * Should we show a preview when the edit form is first shown?
 805          *
 806          * @return bool
 807          */
 808         protected function previewOnOpen() {
 809                 $config = $this->context->getConfig();
 810                 $previewOnOpenNamespaces = $config->get( 'PreviewOnOpenNamespaces' );
 811                 $request = $this->context->getRequest();
 812                 if ( $config->get( 'RawHtml' ) ) {
 813                         // If raw HTML is enabled, disable preview on open
 814                         // since it has to be posted with a token for
 815                         // security reasons
 816                         return false;
 817                 }
 818                 if ( $request->getVal( 'preview' ) == 'yes' ) {
 819                         // Explicit override from request
 820                         return true;
 821                 } elseif ( $request->getVal( 'preview' ) == 'no' ) {
 822                         // Explicit override from request
 823                         return false;
 824                 } elseif ( $this->section == 'new' ) {
 825                         // Nothing *to* preview for new sections
 826                         return false;
 827                 } elseif ( ( $request->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 828                         && $this->context->getUser()->getOption( 'previewonfirst' )
 829                 ) {
 830                         // Standard preference behavior
 831                         return true;
 832                 } elseif ( !$this->mTitle->exists()
 833                         && isset( $previewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 834                         && $previewOnOpenNamespaces[$this->mTitle->getNamespace()]
 835                 ) {
 836                         // Categories are special
 837                         return true;
 838                 } else {
 839                         return false;
 840                 }
 841         }
 842
 843         /**
 844          * Checks whether the user entered a skin name in uppercase,
 845          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 846          *
 847          * @return bool
 848          */
 849         protected function isWrongCaseUserConfigPage() {
 850                 if ( $this->mTitle->isUserConfigPage() ) {
 851                         $name = $this->mTitle->getSkinFromConfigSubpage();
 852                         $skins = array_merge(
 853                                 array_keys( Skin::getSkinNames() ),
 854                                 [ 'common' ]
 855                         );
 856                         return !in_array( $name, $skins )
 857                                 && in_array( strtolower( $name ), $skins );
 858                 } else {
 859                         return false;
 860                 }
 861         }
 862
 863         /**
 864          * Returns whether section editing is supported for the current page.
 865          * Subclasses may override this to replace the default behavior, which is
 866          * to check ContentHandler::supportsSections.
 867          *
 868          * @return bool True if this edit page supports sections, false otherwise.
 869          */
 870         protected function isSectionEditSupported() {
 871                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 872                 return $contentHandler->supportsSections();
 873         }
 874
 875         /**
 876          * This function collects the form data and uses it to populate various member variables.
 877          * @param WebRequest &$request
 878          * @throws ErrorPageError
 879          */
 880         public function importFormData( &$request ) {
 881                 # Section edit can come from either the form or a link
 882                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 883
 884                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 885                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 886                 }
 887
 888                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 889
 890                 if ( $request->wasPosted() ) {
 891                         # These fields need to be checked for encoding.
 892                         # Also remove trailing whitespace, but don't remove _initial_
 893                         # whitespace from the text boxes. This may be significant formatting.
 894                         $this->textbox1 = rtrim( $request->getText( 'wpTextbox1' ) );
 895                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 896                                 // Skip this if wpTextbox2 has input, it indicates that we came
 897                                 // from a conflict page with raw page text, not a custom form
 898                                 // modified by subclasses
 899                                 $textbox1 = $this->importContentFormData( $request );
 900                                 if ( $textbox1 !== null ) {
 901                                         $this->textbox1 = $textbox1;
 902                                 }
 903                         }
 904
 905                         $this->unicodeCheck = $request->getText( 'wpUnicodeCheck' );
 906
 907                         $this->summary = $request->getText( 'wpSummary' );
 908
 909                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 910                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 911                         # section titles.
 912                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 913
 914                         # Treat sectiontitle the same way as summary.
 915                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 916                         # currently doing double duty as both edit summary and section title. Right now this
 917                         # is just to allow API edits to work around this limitation, but this should be
 918                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 919                         $this->sectiontitle = $request->getText( 'wpSectionTitle' );
 920                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 921
 922                         $this->edittime = $request->getVal( 'wpEdittime' );
 923                         $this->editRevId = $request->getIntOrNull( 'editRevId' );
 924                         $this->starttime = $request->getVal( 'wpStarttime' );
 925
 926                         $undidRev = $request->getInt( 'wpUndidRevision' );
 927                         if ( $undidRev ) {
 928                                 $this->undidRev = $undidRev;
 929                         }
 930
 931                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 932
 933                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 934                                 // wpTextbox1 field is missing, possibly due to being "too big"
 935                                 // according to some filter rules such as Suhosin's setting for
 936                                 // suhosin.request.max_value_length (d'oh)
 937                                 $this->incompleteForm = true;
 938                         } else {
 939                                 // If we receive the last parameter of the request, we can fairly
 940                                 // claim the POST request has not been truncated.
 941
 942                                 // TODO: softened the check for cutover.  Once we determine
 943                                 // that it is safe, we should complete the transition by
 944                                 // removing the "edittime" clause.
 945                                 $this->incompleteForm = ( !$request->getVal( 'wpUltimateParam' )
 946                                         && is_null( $this->edittime ) );
 947                         }
 948                         if ( $this->incompleteForm ) {
 949                                 # If the form is incomplete, force to preview.
 950                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 951                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 952                                 $this->preview = true;
 953                         } else {
 954                                 $this->preview = $request->getCheck( 'wpPreview' );
 955                                 $this->diff = $request->getCheck( 'wpDiff' );
 956
 957                                 // Remember whether a save was requested, so we can indicate
 958                                 // if we forced preview due to session failure.
 959                                 $this->mTriedSave = !$this->preview;
 960
 961                                 if ( $this->tokenOk( $request ) ) {
 962                                         # Some browsers will not report any submit button
 963                                         # if the user hits enter in the comment box.
 964                                         # The unmarked state will be assumed to be a save,
 965                                         # if the form seems otherwise complete.
 966                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 967                                 } elseif ( $this->diff ) {
 968                                         # Failed token check, but only requested "Show Changes".
 969                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 970                                 } else {
 971                                         # Page might be a hack attempt posted from
 972                                         # an external site. Preview instead of saving.
 973                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 974                                         $this->preview = true;
 975                                 }
 976                         }
 977                         $this->save = !$this->preview && !$this->diff;
 978                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 979                                 $this->edittime = null;
 980                         }
 981
 982                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 983                                 $this->starttime = null;
 984                         }
 985
 986                         $this->recreate = $request->getCheck( 'wpRecreate' );
 987
 988                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 989                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 990
 991                         $user = $this->context->getUser();
 992                         # Don't force edit summaries when a user is editing their own user or talk page
 993                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 994                                 && $this->mTitle->getText() == $user->getName()
 995                         ) {
 996                                 $this->allowBlankSummary = true;
 997                         } else {
 998                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
 999                                         || !$user->getOption( 'forceeditsummary' );
1000                         }
1001
1002                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
1003
1004                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
1005                         $this->allowSelfRedirect = $request->getBool( 'wpIgnoreSelfRedirect' );
1006
1007                         $changeTags = $request->getVal( 'wpChangeTags' );
1008                         if ( is_null( $changeTags ) || $changeTags === '' ) {
1009                                 $this->changeTags = [];
1010                         } else {
1011                                 $this->changeTags = array_filter( array_map( 'trim', explode( ',',
1012                                         $changeTags ) ) );
1013                         }
1014                 } else {
1015                         # Not a posted form? Start with nothing.
1016                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
1017                         $this->textbox1 = '';
1018                         $this->summary = '';
1019                         $this->sectiontitle = '';
1020                         $this->edittime = '';
1021                         $this->editRevId = null;
1022                         $this->starttime = wfTimestampNow();
1023                         $this->edit = false;
1024                         $this->preview = false;
1025                         $this->save = false;
1026                         $this->diff = false;
1027                         $this->minoredit = false;
1028                         // Watch may be overridden by request parameters
1029                         $this->watchthis = $request->getBool( 'watchthis', false );
1030                         $this->recreate = false;
1031
1032                         // When creating a new section, we can preload a section title by passing it as the
1033                         // preloadtitle parameter in the URL (T15100)
1034                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
1035                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
1036                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
1037                                 $this->summary = $request->getVal( 'preloadtitle' );
1038                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
1039                                 $this->summary = $request->getText( 'summary' );
1040                                 if ( $this->summary !== '' ) {
1041                                         $this->hasPresetSummary = true;
1042                                 }
1043                         }
1044
1045                         if ( $request->getVal( 'minor' ) ) {
1046                                 $this->minoredit = true;
1047                         }
1048                 }
1049
1050                 $this->oldid = $request->getInt( 'oldid' );
1051                 $this->parentRevId = $request->getInt( 'parentRevId' );
1052
1053                 $this->bot = $request->getBool( 'bot', true );
1054                 $this->nosummary = $request->getBool( 'nosummary' );
1055
1056                 // May be overridden by revision.
1057                 $this->contentModel = $request->getText( 'model', $this->contentModel );
1058                 // May be overridden by revision.
1059                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
1060
1061                 try {
1062                         $handler = ContentHandler::getForModelID( $this->contentModel );
1063                 } catch ( MWUnknownContentModelException $e ) {
1064                         throw new ErrorPageError(
1065                                 'editpage-invalidcontentmodel-title',
1066                                 'editpage-invalidcontentmodel-text',
1067                                 [ wfEscapeWikiText( $this->contentModel ) ]
1068                         );
1069                 }
1070
1071                 if ( !$handler->isSupportedFormat( $this->contentFormat ) ) {
1072                         throw new ErrorPageError(
1073                                 'editpage-notsupportedcontentformat-title',
1074                                 'editpage-notsupportedcontentformat-text',
1075                                 [
1076                                         wfEscapeWikiText( $this->contentFormat ),
1077                                         wfEscapeWikiText( ContentHandler::getLocalizedName( $this->contentModel ) )
1078                                 ]
1079                         );
1080                 }
1081
1082                 /**
1083                  * @todo Check if the desired model is allowed in this namespace, and if
1084                  *   a transition from the page's current model to the new model is
1085                  *   allowed.
1086                  */
1087
1088                 $this->editintro = $request->getText( 'editintro',
1089                         // Custom edit intro for new sections
1090                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
1091
1092                 // Allow extensions to modify form data
1093                 Hooks::run( 'EditPage::importFormData', [ $this, $request ] );
1094         }
1095
1096         /**
1097          * Subpage overridable method for extracting the page content data from the
1098          * posted form to be placed in $this->textbox1, if using customized input
1099          * this method should be overridden and return the page text that will be used
1100          * for saving, preview parsing and so on...
1101          *
1102          * @param WebRequest &$request
1103          * @return string|null
1104          */
1105         protected function importContentFormData( &$request ) {
1106                 return; // Don't do anything, EditPage already extracted wpTextbox1
1107         }
1108
1109         /**
1110          * Initialise form fields in the object
1111          * Called on the first invocation, e.g. when a user clicks an edit link
1112          * @return bool If the requested section is valid
1113          */
1114         public function initialiseForm() {
1115                 $this->edittime = $this->page->getTimestamp();
1116                 $this->editRevId = $this->page->getLatest();
1117
1118                 $content = $this->getContentObject( false ); # TODO: track content object?!
1119                 if ( $content === false ) {
1120                         return false;
1121                 }
1122                 $this->textbox1 = $this->toEditText( $content );
1123
1124                 $user = $this->context->getUser();
1125                 // activate checkboxes if user wants them to be always active
1126                 # Sort out the "watch" checkbox
1127                 if ( $user->getOption( 'watchdefault' ) ) {
1128                         # Watch all edits
1129                         $this->watchthis = true;
1130                 } elseif ( $user->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1131                         # Watch creations
1132                         $this->watchthis = true;
1133                 } elseif ( $user->isWatched( $this->mTitle ) ) {
1134                         # Already watched
1135                         $this->watchthis = true;
1136                 }
1137                 if ( $user->getOption( 'minordefault' ) && !$this->isNew ) {
1138                         $this->minoredit = true;
1139                 }
1140                 if ( $this->textbox1 === false ) {
1141                         return false;
1142                 }
1143                 return true;
1144         }
1145
1146         /**
1147          * @param Content|null $def_content The default value to return
1148          *
1149          * @return Content|null Content on success, $def_content for invalid sections
1150          *
1151          * @since 1.21
1152          */
1153         protected function getContentObject( $def_content = null ) {
1154                 global $wgContLang;
1155
1156                 $content = false;
1157
1158                 $user = $this->context->getUser();
1159                 $request = $this->context->getRequest();
1160                 // For message page not locally set, use the i18n message.
1161                 // For other non-existent articles, use preload text if any.
1162                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
1163                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
1164                                 # If this is a system message, get the default text.
1165                                 $msg = $this->mTitle->getDefaultMessageText();
1166
1167                                 $content = $this->toEditContent( $msg );
1168                         }
1169                         if ( $content === false ) {
1170                                 # If requested, preload some text.
1171                                 $preload = $request->getVal( 'preload',
1172                                         // Custom preload text for new sections
1173                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1174                                 $params = $request->getArray( 'preloadparams', [] );
1175
1176                                 $content = $this->getPreloadedContent( $preload, $params );
1177                         }
1178                 // For existing pages, get text based on "undo" or section parameters.
1179                 } else {
1180                         if ( $this->section != '' ) {
1181                                 // Get section edit text (returns $def_text for invalid sections)
1182                                 $orig = $this->getOriginalContent( $user );
1183                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1184
1185                                 if ( !$content ) {
1186                                         $content = $def_content;
1187                                 }
1188                         } else {
1189                                 $undoafter = $request->getInt( 'undoafter' );
1190                                 $undo = $request->getInt( 'undo' );
1191
1192                                 if ( $undo > 0 && $undoafter > 0 ) {
1193                                         $undorev = Revision::newFromId( $undo );
1194                                         $oldrev = Revision::newFromId( $undoafter );
1195
1196                                         # Sanity check, make sure it's the right page,
1197                                         # the revisions exist and they were not deleted.
1198                                         # Otherwise, $content will be left as-is.
1199                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1200                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1201                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT )
1202                                         ) {
1203                                                 $content = $this->page->getUndoContent( $undorev, $oldrev );
1204
1205                                                 if ( $content === false ) {
1206                                                         # Warn the user that something went wrong
1207                                                         $undoMsg = 'failure';
1208                                                 } else {
1209                                                         $oldContent = $this->page->getContent( Revision::RAW );
1210                                                         $popts = ParserOptions::newFromUserAndLang( $user, $wgContLang );
1211                                                         $newContent = $content->preSaveTransform( $this->mTitle, $user, $popts );
1212                                                         if ( $newContent->getModel() !== $oldContent->getModel() ) {
1213                                                                 // The undo may change content
1214                                                                 // model if its reverting the top
1215                                                                 // edit. This can result in
1216                                                                 // mismatched content model/format.
1217                                                                 $this->contentModel = $newContent->getModel();
1218                                                                 $this->contentFormat = $oldrev->getContentFormat();
1219                                                         }
1220
1221                                                         if ( $newContent->equals( $oldContent ) ) {
1222                                                                 # Tell the user that the undo results in no change,
1223                                                                 # i.e. the revisions were already undone.
1224                                                                 $undoMsg = 'nochange';
1225                                                                 $content = false;
1226                                                         } else {
1227                                                                 # Inform the user of our success and set an automatic edit summary
1228                                                                 $undoMsg = 'success';
1229
1230                                                                 # If we just undid one rev, use an autosummary
1231                                                                 $firstrev = $oldrev->getNext();
1232                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1233                                                                         $userText = $undorev->getUserText();
1234                                                                         if ( $userText === '' ) {
1235                                                                                 $undoSummary = $this->context->msg(
1236                                                                                         'undo-summary-username-hidden',
1237                                                                                         $undo
1238                                                                                 )->inContentLanguage()->text();
1239                                                                         } else {
1240                                                                                 $undoSummary = $this->context->msg(
1241                                                                                         'undo-summary',
1242                                                                                         $undo,
1243                                                                                         $userText
1244                                                                                 )->inContentLanguage()->text();
1245                                                                         }
1246                                                                         if ( $this->summary === '' ) {
1247                                                                                 $this->summary = $undoSummary;
1248                                                                         } else {
1249                                                                                 $this->summary = $undoSummary . $this->context->msg( 'colon-separator' )
1250                                                                                         ->inContentLanguage()->text() . $this->summary;
1251                                                                         }
1252                                                                         $this->undidRev = $undo;
1253                                                                 }
1254                                                                 $this->formtype = 'diff';
1255                                                         }
1256                                                 }
1257                                         } else {
1258                                                 // Failed basic sanity checks.
1259                                                 // Older revisions may have been removed since the link
1260                                                 // was created, or we may simply have got bogus input.
1261                                                 $undoMsg = 'norev';
1262                                         }
1263
1264                                         $out = $this->context->getOutput();
1265                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1266                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1267                                         $this->editFormPageTop .= $out->parse( "<div class=\"{$class}\">" .
1268                                                 $this->context->msg( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1269                                 }
1270
1271                                 if ( $content === false ) {
1272                                         $content = $this->getOriginalContent( $user );
1273                                 }
1274                         }
1275                 }
1276
1277                 return $content;
1278         }
1279
1280         /**
1281          * Get the content of the wanted revision, without section extraction.
1282          *
1283          * The result of this function can be used to compare user's input with
1284          * section replaced in its context (using WikiPage::replaceSectionAtRev())
1285          * to the original text of the edit.
1286          *
1287          * This differs from Article::getContent() that when a missing revision is
1288          * encountered the result will be null and not the
1289          * 'missing-revision' message.
1290          *
1291          * @since 1.19
1292          * @param User $user The user to get the revision for
1293          * @return Content|null
1294          */
1295         private function getOriginalContent( User $user ) {
1296                 if ( $this->section == 'new' ) {
1297                         return $this->getCurrentContent();
1298                 }
1299                 $revision = $this->mArticle->getRevisionFetched();
1300                 if ( $revision === null ) {
1301                         $handler = ContentHandler::getForModelID( $this->contentModel );
1302                         return $handler->makeEmptyContent();
1303                 }
1304                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1305                 return $content;
1306         }
1307
1308         /**
1309          * Get the edit's parent revision ID
1310          *
1311          * The "parent" revision is the ancestor that should be recorded in this
1312          * page's revision history.  It is either the revision ID of the in-memory
1313          * article content, or in the case of a 3-way merge in order to rebase
1314          * across a recoverable edit conflict, the ID of the newer revision to
1315          * which we have rebased this page.
1316          *
1317          * @since 1.27
1318          * @return int Revision ID
1319          */
1320         public function getParentRevId() {
1321                 if ( $this->parentRevId ) {
1322                         return $this->parentRevId;
1323                 } else {
1324                         return $this->mArticle->getRevIdFetched();
1325                 }
1326         }
1327
1328         /**
1329          * Get the current content of the page. This is basically similar to
1330          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1331          * content object is returned instead of null.
1332          *
1333          * @since 1.21
1334          * @return Content
1335          */
1336         protected function getCurrentContent() {
1337                 $rev = $this->page->getRevision();
1338                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1339
1340                 if ( $content === false || $content === null ) {
1341                         $handler = ContentHandler::getForModelID( $this->contentModel );
1342                         return $handler->makeEmptyContent();
1343                 } elseif ( !$this->undidRev ) {
1344                         // Content models should always be the same since we error
1345                         // out if they are different before this point (in ->edit()).
1346                         // The exception being, during an undo, the current revision might
1347                         // differ from the prior revision.
1348                         $logger = LoggerFactory::getInstance( 'editpage' );
1349                         if ( $this->contentModel !== $rev->getContentModel() ) {
1350                                 $logger->warning( "Overriding content model from current edit {prev} to {new}", [
1351                                         'prev' => $this->contentModel,
1352                                         'new' => $rev->getContentModel(),
1353                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1354                                         'method' => __METHOD__
1355                                 ] );
1356                                 $this->contentModel = $rev->getContentModel();
1357                         }
1358
1359                         // Given that the content models should match, the current selected
1360                         // format should be supported.
1361                         if ( !$content->isSupportedFormat( $this->contentFormat ) ) {
1362                                 $logger->warning( "Current revision content format unsupported. Overriding {prev} to {new}", [
1363
1364                                         'prev' => $this->contentFormat,
1365                                         'new' => $rev->getContentFormat(),
1366                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1367                                         'method' => __METHOD__
1368                                 ] );
1369                                 $this->contentFormat = $rev->getContentFormat();
1370                         }
1371                 }
1372                 return $content;
1373         }
1374
1375         /**
1376          * Use this method before edit() to preload some content into the edit box
1377          *
1378          * @param Content $content
1379          *
1380          * @since 1.21
1381          */
1382         public function setPreloadedContent( Content $content ) {
1383                 $this->mPreloadContent = $content;
1384         }
1385
1386         /**
1387          * Get the contents to be preloaded into the box, either set by
1388          * an earlier setPreloadText() or by loading the given page.
1389          *
1390          * @param string $preload Representing the title to preload from.
1391          * @param array $params Parameters to use (interface-message style) in the preloaded text
1392          *
1393          * @return Content
1394          *
1395          * @since 1.21
1396          */
1397         protected function getPreloadedContent( $preload, $params = [] ) {
1398                 if ( !empty( $this->mPreloadContent ) ) {
1399                         return $this->mPreloadContent;
1400                 }
1401
1402                 $handler = ContentHandler::getForModelID( $this->contentModel );
1403
1404                 if ( $preload === '' ) {
1405                         return $handler->makeEmptyContent();
1406                 }
1407
1408                 $user = $this->context->getUser();
1409                 $title = Title::newFromText( $preload );
1410                 # Check for existence to avoid getting MediaWiki:Noarticletext
1411                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $user ) ) {
1412                         // TODO: somehow show a warning to the user!
1413                         return $handler->makeEmptyContent();
1414                 }
1415
1416                 $page = WikiPage::factory( $title );
1417                 if ( $page->isRedirect() ) {
1418                         $title = $page->getRedirectTarget();
1419                         # Same as before
1420                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $user ) ) {
1421                                 // TODO: somehow show a warning to the user!
1422                                 return $handler->makeEmptyContent();
1423                         }
1424                         $page = WikiPage::factory( $title );
1425                 }
1426
1427                 $parserOptions = ParserOptions::newFromUser( $user );
1428                 $content = $page->getContent( Revision::RAW );
1429
1430                 if ( !$content ) {
1431                         // TODO: somehow show a warning to the user!
1432                         return $handler->makeEmptyContent();
1433                 }
1434
1435                 if ( $content->getModel() !== $handler->getModelID() ) {
1436                         $converted = $content->convert( $handler->getModelID() );
1437
1438                         if ( !$converted ) {
1439                                 // TODO: somehow show a warning to the user!
1440                                 wfDebug( "Attempt to preload incompatible content: " .
1441                                         "can't convert " . $content->getModel() .
1442                                         " to " . $handler->getModelID() );
1443
1444                                 return $handler->makeEmptyContent();
1445                         }
1446
1447                         $content = $converted;
1448                 }
1449
1450                 return $content->preloadTransform( $title, $parserOptions, $params );
1451         }
1452
1453         /**
1454          * Make sure the form isn't faking a user's credentials.
1455          *
1456          * @param WebRequest &$request
1457          * @return bool
1458          * @private
1459          */
1460         public function tokenOk( &$request ) {
1461                 $token = $request->getVal( 'wpEditToken' );
1462                 $user = $this->context->getUser();
1463                 $this->mTokenOk = $user->matchEditToken( $token );
1464                 $this->mTokenOkExceptSuffix = $user->matchEditTokenNoSuffix( $token );
1465                 return $this->mTokenOk;
1466         }
1467
1468         /**
1469          * Sets post-edit cookie indicating the user just saved a particular revision.
1470          *
1471          * This uses a temporary cookie for each revision ID so separate saves will never
1472          * interfere with each other.
1473          *
1474          * Article::view deletes the cookie on server-side after the redirect and
1475          * converts the value to the global JavaScript variable wgPostEdit.
1476          *
1477          * If the variable were set on the server, it would be cached, which is unwanted
1478          * since the post-edit state should only apply to the load right after the save.
1479          *
1480          * @param int $statusValue The status value (to check for new article status)
1481          */
1482         protected function setPostEditCookie( $statusValue ) {
1483                 $revisionId = $this->page->getLatest();
1484                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1485
1486                 $val = 'saved';
1487                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1488                         $val = 'created';
1489                 } elseif ( $this->oldid ) {
1490                         $val = 'restored';
1491                 }
1492
1493                 $response = $this->context->getRequest()->response();
1494                 $response->setCookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION );
1495         }
1496
1497         /**
1498          * Attempt submission
1499          * @param array|bool &$resultDetails See docs for $result in internalAttemptSave
1500          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1501          * @return Status The resulting status object.
1502          */
1503         public function attemptSave( &$resultDetails = false ) {
1504                 # Allow bots to exempt some edits from bot flagging
1505                 $bot = $this->context->getUser()->isAllowed( 'bot' ) && $this->bot;
1506                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1507
1508                 Hooks::run( 'EditPage::attemptSave:after', [ $this, $status, $resultDetails ] );
1509
1510                 return $status;
1511         }
1512
1513         /**
1514          * Log when a page was successfully saved after the edit conflict view
1515          */
1516         private function incrementResolvedConflicts() {
1517                 if ( $this->context->getRequest()->getText( 'mode' ) !== 'conflict' ) {
1518                         return;
1519                 }
1520
1521                 $this->getEditConflictHelper()->incrementResolvedStats();
1522         }
1523
1524         /**
1525          * Handle status, such as after attempt save
1526          *
1527          * @param Status $status
1528          * @param array|bool $resultDetails
1529          *
1530          * @throws ErrorPageError
1531          * @return bool False, if output is done, true if rest of the form should be displayed
1532          */
1533         private function handleStatus( Status $status, $resultDetails ) {
1534                 /**
1535                  * @todo FIXME: once the interface for internalAttemptSave() is made
1536                  *   nicer, this should use the message in $status
1537                  */
1538                 if ( $status->value == self::AS_SUCCESS_UPDATE
1539                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1540                 ) {
1541                         $this->incrementResolvedConflicts();
1542
1543                         $this->didSave = true;
1544                         if ( !$resultDetails['nullEdit'] ) {
1545                                 $this->setPostEditCookie( $status->value );
1546                         }
1547                 }
1548
1549                 $out = $this->context->getOutput();
1550
1551                 // "wpExtraQueryRedirect" is a hidden input to modify
1552                 // after save URL and is not used by actual edit form
1553                 $request = $this->context->getRequest();
1554                 $extraQueryRedirect = $request->getVal( 'wpExtraQueryRedirect' );
1555
1556                 switch ( $status->value ) {
1557                         case self::AS_HOOK_ERROR_EXPECTED:
1558                         case self::AS_CONTENT_TOO_BIG:
1559                         case self::AS_ARTICLE_WAS_DELETED:
1560                         case self::AS_CONFLICT_DETECTED:
1561                         case self::AS_SUMMARY_NEEDED:
1562                         case self::AS_TEXTBOX_EMPTY:
1563                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1564                         case self::AS_END:
1565                         case self::AS_BLANK_ARTICLE:
1566                         case self::AS_SELF_REDIRECT:
1567                                 return true;
1568
1569                         case self::AS_HOOK_ERROR:
1570                                 return false;
1571
1572                         case self::AS_CANNOT_USE_CUSTOM_MODEL:
1573                         case self::AS_PARSE_ERROR:
1574                         case self::AS_UNICODE_NOT_SUPPORTED:
1575                                 $out->addWikiText( '<div class="error">' . "\n" . $status->getWikiText() . '</div>' );
1576                                 return true;
1577
1578                         case self::AS_SUCCESS_NEW_ARTICLE:
1579                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1580                                 if ( $extraQueryRedirect ) {
1581                                         if ( $query === '' ) {
1582                                                 $query = $extraQueryRedirect;
1583                                         } else {
1584                                                 $query = $query . '&' . $extraQueryRedirect;
1585                                         }
1586                                 }
1587                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1588                                 $out->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1589                                 return false;
1590
1591                         case self::AS_SUCCESS_UPDATE:
1592                                 $extraQuery = '';
1593                                 $sectionanchor = $resultDetails['sectionanchor'];
1594
1595                                 // Give extensions a chance to modify URL query on update
1596                                 Hooks::run(
1597                                         'ArticleUpdateBeforeRedirect',
1598                                         [ $this->mArticle, &$sectionanchor, &$extraQuery ]
1599                                 );
1600
1601                                 if ( $resultDetails['redirect'] ) {
1602                                         if ( $extraQuery == '' ) {
1603                                                 $extraQuery = 'redirect=no';
1604                                         } else {
1605                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1606                                         }
1607                                 }
1608                                 if ( $extraQueryRedirect ) {
1609                                         if ( $extraQuery === '' ) {
1610                                                 $extraQuery = $extraQueryRedirect;
1611                                         } else {
1612                                                 $extraQuery = $extraQuery . '&' . $extraQueryRedirect;
1613                                         }
1614                                 }
1615
1616                                 $out->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1617                                 return false;
1618
1619                         case self::AS_SPAM_ERROR:
1620                                 $this->spamPageWithContent( $resultDetails['spam'] );
1621                                 return false;
1622
1623                         case self::AS_BLOCKED_PAGE_FOR_USER:
1624                                 throw new UserBlockedError( $this->context->getUser()->getBlock() );
1625
1626                         case self::AS_IMAGE_REDIRECT_ANON:
1627                         case self::AS_IMAGE_REDIRECT_LOGGED:
1628                                 throw new PermissionsError( 'upload' );
1629
1630                         case self::AS_READ_ONLY_PAGE_ANON:
1631                         case self::AS_READ_ONLY_PAGE_LOGGED:
1632                                 throw new PermissionsError( 'edit' );
1633
1634                         case self::AS_READ_ONLY_PAGE:
1635                                 throw new ReadOnlyError;
1636
1637                         case self::AS_RATE_LIMITED:
1638                                 throw new ThrottledError();
1639
1640                         case self::AS_NO_CREATE_PERMISSION:
1641                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1642                                 throw new PermissionsError( $permission );
1643
1644                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1645                                 throw new PermissionsError( 'editcontentmodel' );
1646
1647                         default:
1648                                 // We don't recognize $status->value. The only way that can happen
1649                                 // is if an extension hook aborted from inside ArticleSave.
1650                                 // Render the status object into $this->hookError
1651                                 // FIXME this sucks, we should just use the Status object throughout
1652                                 $this->hookError = '<div class="error">' ."\n" . $status->getWikiText() .
1653                                         '</div>';
1654                                 return true;
1655                 }
1656         }
1657
1658         /**
1659          * Run hooks that can filter edits just before they get saved.
1660          *
1661          * @param Content $content The Content to filter.
1662          * @param Status $status For reporting the outcome to the caller
1663          * @param User $user The user performing the edit
1664          *
1665          * @return bool
1666          */
1667         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1668                 // Run old style post-section-merge edit filter
1669                 if ( $this->hookError != '' ) {
1670                         # ...or the hook could be expecting us to produce an error
1671                         $status->fatal( 'hookaborted' );
1672                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1673                         return false;
1674                 }
1675
1676                 // Run new style post-section-merge edit filter
1677                 if ( !Hooks::run( 'EditFilterMergedContent',
1678                                 [ $this->context, $content, $status, $this->summary,
1679                                 $user, $this->minoredit ] )
1680                 ) {
1681                         # Error messages etc. could be handled within the hook...
1682                         if ( $status->isGood() ) {
1683                                 $status->fatal( 'hookaborted' );
1684                                 // Not setting $this->hookError here is a hack to allow the hook
1685                                 // to cause a return to the edit page without $this->hookError
1686                                 // being set. This is used by ConfirmEdit to display a captcha
1687                                 // without any error message cruft.
1688                         } else {
1689                                 $this->hookError = $this->formatStatusErrors( $status );
1690                         }
1691                         // Use the existing $status->value if the hook set it
1692                         if ( !$status->value ) {
1693                                 $status->value = self::AS_HOOK_ERROR;
1694                         }
1695                         return false;
1696                 } elseif ( !$status->isOK() ) {
1697                         # ...or the hook could be expecting us to produce an error
1698                         // FIXME this sucks, we should just use the Status object throughout
1699                         $this->hookError = $this->formatStatusErrors( $status );
1700                         $status->fatal( 'hookaborted' );
1701                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1702                         return false;
1703                 }
1704
1705                 return true;
1706         }
1707
1708         /**
1709          * Wrap status errors in an errorbox for increased visiblity
1710          *
1711          * @param Status $status
1712          * @return string Wikitext
1713          */
1714         private function formatStatusErrors( Status $status ) {
1715                 $errmsg = $status->getWikiText(
1716                         'edit-error-short',
1717                         'edit-error-long',
1718                         $this->context->getLanguage()
1719                 );
1720                 return <<<ERROR
1721 <div class="errorbox">
1722 {$errmsg}
1723 </div>
1724 <br clear="all" />
1725 ERROR;
1726         }
1727
1728         /**
1729          * Return the summary to be used for a new section.
1730          *
1731          * @param string $sectionanchor Set to the section anchor text
1732          * @return string
1733          */
1734         private function newSectionSummary( &$sectionanchor = null ) {
1735                 global $wgParser;
1736
1737                 if ( $this->sectiontitle !== '' ) {
1738                         $sectionanchor = $this->guessSectionName( $this->sectiontitle );
1739                         // If no edit summary was specified, create one automatically from the section
1740                         // title and have it link to the new section. Otherwise, respect the summary as
1741                         // passed.
1742                         if ( $this->summary === '' ) {
1743                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1744                                 return $this->context->msg( 'newsectionsummary' )
1745                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1746                         }
1747                 } elseif ( $this->summary !== '' ) {
1748                         $sectionanchor = $this->guessSectionName( $this->summary );
1749                         # This is a new section, so create a link to the new section
1750                         # in the revision summary.
1751                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1752                         return $this->context->msg( 'newsectionsummary' )
1753                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1754                 }
1755                 return $this->summary;
1756         }
1757
1758         /**
1759          * Attempt submission (no UI)
1760          *
1761          * @param array &$result Array to add statuses to, currently with the
1762          *   possible keys:
1763          *   - spam (string): Spam string from content if any spam is detected by
1764          *     matchSpamRegex.
1765          *   - sectionanchor (string): Section anchor for a section save.
1766          *   - nullEdit (bool): Set if doEditContent is OK.  True if null edit,
1767          *     false otherwise.
1768          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1769          *     revision is a redirect.
1770          * @param bool $bot True if edit is being made under the bot right.
1771          *
1772          * @return Status Status object, possibly with a message, but always with
1773          *   one of the AS_* constants in $status->value,
1774          *
1775          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1776          *   various error display idiosyncrasies. There are also lots of cases
1777          *   where error metadata is set in the object and retrieved later instead
1778          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1779          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1780          * time.
1781          */
1782         public function internalAttemptSave( &$result, $bot = false ) {
1783                 $status = Status::newGood();
1784                 $user = $this->context->getUser();
1785
1786                 if ( !Hooks::run( 'EditPage::attemptSave', [ $this ] ) ) {
1787                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1788                         $status->fatal( 'hookaborted' );
1789                         $status->value = self::AS_HOOK_ERROR;
1790                         return $status;
1791                 }
1792
1793                 if ( $this->unicodeCheck !== self::UNICODE_CHECK ) {
1794                         $status->fatal( 'unicode-support-fail' );
1795                         $status->value = self::AS_UNICODE_NOT_SUPPORTED;
1796                         return $status;
1797                 }
1798
1799                 $request = $this->context->getRequest();
1800                 $spam = $request->getText( 'wpAntispam' );
1801                 if ( $spam !== '' ) {
1802                         wfDebugLog(
1803                                 'SimpleAntiSpam',
1804                                 $user->getName() .
1805                                 ' editing "' .
1806                                 $this->mTitle->getPrefixedText() .
1807                                 '" submitted bogus field "' .
1808                                 $spam .
1809                                 '"'
1810                         );
1811                         $status->fatal( 'spamprotectionmatch', false );
1812                         $status->value = self::AS_SPAM_ERROR;
1813                         return $status;
1814                 }
1815
1816                 try {
1817                         # Construct Content object
1818                         $textbox_content = $this->toEditContent( $this->textbox1 );
1819                 } catch ( MWContentSerializationException $ex ) {
1820                         $status->fatal(
1821                                 'content-failed-to-parse',
1822                                 $this->contentModel,
1823                                 $this->contentFormat,
1824                                 $ex->getMessage()
1825                         );
1826                         $status->value = self::AS_PARSE_ERROR;
1827                         return $status;
1828                 }
1829
1830                 # Check image redirect
1831                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1832                         $textbox_content->isRedirect() &&
1833                         !$user->isAllowed( 'upload' )
1834                 ) {
1835                                 $code = $user->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1836                                 $status->setResult( false, $code );
1837
1838                                 return $status;
1839                 }
1840
1841                 # Check for spam
1842                 $match = self::matchSummarySpamRegex( $this->summary );
1843                 if ( $match === false && $this->section == 'new' ) {
1844                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1845                         # regular summaries, it is added to the actual wikitext.
1846                         if ( $this->sectiontitle !== '' ) {
1847                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1848                                 $match = self::matchSpamRegex( $this->sectiontitle );
1849                         } else {
1850                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1851                                 # is used with the 'summary' parameter.
1852                                 $match = self::matchSpamRegex( $this->summary );
1853                         }
1854                 }
1855                 if ( $match === false ) {
1856                         $match = self::matchSpamRegex( $this->textbox1 );
1857                 }
1858                 if ( $match !== false ) {
1859                         $result['spam'] = $match;
1860                         $ip = $request->getIP();
1861                         $pdbk = $this->mTitle->getPrefixedDBkey();
1862                         $match = str_replace( "\n", '', $match );
1863                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1864                         $status->fatal( 'spamprotectionmatch', $match );
1865                         $status->value = self::AS_SPAM_ERROR;
1866                         return $status;
1867                 }
1868                 if ( !Hooks::run(
1869                         'EditFilter',
1870                         [ $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ] )
1871                 ) {
1872                         # Error messages etc. could be handled within the hook...
1873                         $status->fatal( 'hookaborted' );
1874                         $status->value = self::AS_HOOK_ERROR;
1875                         return $status;
1876                 } elseif ( $this->hookError != '' ) {
1877                         # ...or the hook could be expecting us to produce an error
1878                         $status->fatal( 'hookaborted' );
1879                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1880                         return $status;
1881                 }
1882
1883                 if ( $user->isBlockedFrom( $this->mTitle, false ) ) {
1884                         // Auto-block user's IP if the account was "hard" blocked
1885                         if ( !wfReadOnly() ) {
1886                                 $user->spreadAnyEditBlock();
1887                         }
1888                         # Check block state against master, thus 'false'.
1889                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1890                         return $status;
1891                 }
1892
1893                 $this->contentLength = strlen( $this->textbox1 );
1894                 $config = $this->context->getConfig();
1895                 $maxArticleSize = $config->get( 'MaxArticleSize' );
1896                 if ( $this->contentLength > $maxArticleSize * 1024 ) {
1897                         // Error will be displayed by showEditForm()
1898                         $this->tooBig = true;
1899                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1900                         return $status;
1901                 }
1902
1903                 if ( !$user->isAllowed( 'edit' ) ) {
1904                         if ( $user->isAnon() ) {
1905                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1906                                 return $status;
1907                         } else {
1908                                 $status->fatal( 'readonlytext' );
1909                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1910                                 return $status;
1911                         }
1912                 }
1913
1914                 $changingContentModel = false;
1915                 if ( $this->contentModel !== $this->mTitle->getContentModel() ) {
1916                         if ( !$config->get( 'ContentHandlerUseDB' ) ) {
1917                                 $status->fatal( 'editpage-cannot-use-custom-model' );
1918                                 $status->value = self::AS_CANNOT_USE_CUSTOM_MODEL;
1919                                 return $status;
1920                         } elseif ( !$user->isAllowed( 'editcontentmodel' ) ) {
1921                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1922                                 return $status;
1923                         }
1924                         // Make sure the user can edit the page under the new content model too
1925                         $titleWithNewContentModel = clone $this->mTitle;
1926                         $titleWithNewContentModel->setContentModel( $this->contentModel );
1927                         if ( !$titleWithNewContentModel->userCan( 'editcontentmodel', $user )
1928                                 || !$titleWithNewContentModel->userCan( 'edit', $user )
1929                         ) {
1930                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1931                                 return $status;
1932                         }
1933
1934                         $changingContentModel = true;
1935                         $oldContentModel = $this->mTitle->getContentModel();
1936                 }
1937
1938                 if ( $this->changeTags ) {
1939                         $changeTagsStatus = ChangeTags::canAddTagsAccompanyingChange(
1940                                 $this->changeTags, $user );
1941                         if ( !$changeTagsStatus->isOK() ) {
1942                                 $changeTagsStatus->value = self::AS_CHANGE_TAG_ERROR;
1943                                 return $changeTagsStatus;
1944                         }
1945                 }
1946
1947                 if ( wfReadOnly() ) {
1948                         $status->fatal( 'readonlytext' );
1949                         $status->value = self::AS_READ_ONLY_PAGE;
1950                         return $status;
1951                 }
1952                 if ( $user->pingLimiter() || $user->pingLimiter( 'linkpurge', 0 )
1953                         || ( $changingContentModel && $user->pingLimiter( 'editcontentmodel' ) )
1954                 ) {
1955                         $status->fatal( 'actionthrottledtext' );
1956                         $status->value = self::AS_RATE_LIMITED;
1957                         return $status;
1958                 }
1959
1960                 # If the article has been deleted while editing, don't save it without
1961                 # confirmation
1962                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1963                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1964                         return $status;
1965                 }
1966
1967                 # Load the page data from the master. If anything changes in the meantime,
1968                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1969                 $this->page->loadPageData( 'fromdbmaster' );
1970                 $new = !$this->page->exists();
1971
1972                 if ( $new ) {
1973                         // Late check for create permission, just in case *PARANOIA*
1974                         if ( !$this->mTitle->userCan( 'create', $user ) ) {
1975                                 $status->fatal( 'nocreatetext' );
1976                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1977                                 wfDebug( __METHOD__ . ": no create permission\n" );
1978                                 return $status;
1979                         }
1980
1981                         // Don't save a new page if it's blank or if it's a MediaWiki:
1982                         // message with content equivalent to default (allow empty pages
1983                         // in this case to disable messages, see T52124)
1984                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1985                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1986                                 $defaultText = $defaultMessageText;
1987                         } else {
1988                                 $defaultText = '';
1989                         }
1990
1991                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
1992                                 $this->blankArticle = true;
1993                                 $status->fatal( 'blankarticle' );
1994                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1995                                 return $status;
1996                         }
1997
1998                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $user ) ) {
1999                                 return $status;
2000                         }
2001
2002                         $content = $textbox_content;
2003
2004                         $result['sectionanchor'] = '';
2005                         if ( $this->section == 'new' ) {
2006                                 if ( $this->sectiontitle !== '' ) {
2007                                         // Insert the section title above the content.
2008                                         $content = $content->addSectionHeader( $this->sectiontitle );
2009                                 } elseif ( $this->summary !== '' ) {
2010                                         // Insert the section title above the content.
2011                                         $content = $content->addSectionHeader( $this->summary );
2012                                 }
2013                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
2014                         }
2015
2016                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
2017
2018                 } else { # not $new
2019
2020                         # Article exists. Check for edit conflict.
2021
2022                         $this->page->clear(); # Force reload of dates, etc.
2023                         $timestamp = $this->page->getTimestamp();
2024                         $latest = $this->page->getLatest();
2025
2026                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
2027
2028                         // Check editRevId if set, which handles same-second timestamp collisions
2029                         if ( $timestamp != $this->edittime
2030                                 || ( $this->editRevId !== null && $this->editRevId != $latest )
2031                         ) {
2032                                 $this->isConflict = true;
2033                                 if ( $this->section == 'new' ) {
2034                                         if ( $this->page->getUserText() == $user->getName() &&
2035                                                 $this->page->getComment() == $this->newSectionSummary()
2036                                         ) {
2037                                                 // Probably a duplicate submission of a new comment.
2038                                                 // This can happen when CDN resends a request after
2039                                                 // a timeout but the first one actually went through.
2040                                                 wfDebug( __METHOD__
2041                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
2042                                         } else {
2043                                                 // New comment; suppress conflict.
2044                                                 $this->isConflict = false;
2045                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
2046                                         }
2047                                 } elseif ( $this->section == ''
2048                                         && Revision::userWasLastToEdit(
2049                                                 DB_MASTER, $this->mTitle->getArticleID(),
2050                                                 $user->getId(), $this->edittime
2051                                         )
2052                                 ) {
2053                                         # Suppress edit conflict with self, except for section edits where merging is required.
2054                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
2055                                         $this->isConflict = false;
2056                                 }
2057                         }
2058
2059                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
2060                         if ( $this->sectiontitle !== '' ) {
2061                                 $sectionTitle = $this->sectiontitle;
2062                         } else {
2063                                 $sectionTitle = $this->summary;
2064                         }
2065
2066                         $content = null;
2067
2068                         if ( $this->isConflict ) {
2069                                 wfDebug( __METHOD__
2070                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
2071                                         . " (id '{$this->editRevId}') (article time '{$timestamp}')\n" );
2072                                 // @TODO: replaceSectionAtRev() with base ID (not prior current) for ?oldid=X case
2073                                 // ...or disable section editing for non-current revisions (not exposed anyway).
2074                                 if ( $this->editRevId !== null ) {
2075                                         $content = $this->page->replaceSectionAtRev(
2076                                                 $this->section,
2077                                                 $textbox_content,
2078                                                 $sectionTitle,
2079                                                 $this->editRevId
2080                                         );
2081                                 } else {
2082                                         $content = $this->page->replaceSectionContent(
2083                                                 $this->section,
2084                                                 $textbox_content,
2085                                                 $sectionTitle,
2086                                                 $this->edittime
2087                                         );
2088                                 }
2089                         } else {
2090                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
2091                                 $content = $this->page->replaceSectionContent(
2092                                         $this->section,
2093                                         $textbox_content,
2094                                         $sectionTitle
2095                                 );
2096                         }
2097
2098                         if ( is_null( $content ) ) {
2099                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
2100                                 $this->isConflict = true;
2101                                 $content = $textbox_content; // do not try to merge here!
2102                         } elseif ( $this->isConflict ) {
2103                                 # Attempt merge
2104                                 if ( $this->mergeChangesIntoContent( $content ) ) {
2105                                         // Successful merge! Maybe we should tell the user the good news?
2106                                         $this->isConflict = false;
2107                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
2108                                 } else {
2109                                         $this->section = '';
2110                                         $this->textbox1 = ContentHandler::getContentText( $content );
2111                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
2112                                 }
2113                         }
2114
2115                         if ( $this->isConflict ) {
2116                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
2117                                 return $status;
2118                         }
2119
2120                         if ( !$this->runPostMergeFilters( $content, $status, $user ) ) {
2121                                 return $status;
2122                         }
2123
2124                         if ( $this->section == 'new' ) {
2125                                 // Handle the user preference to force summaries here
2126                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
2127                                         $this->missingSummary = true;
2128                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
2129                                         $status->value = self::AS_SUMMARY_NEEDED;
2130                                         return $status;
2131                                 }
2132
2133                                 // Do not allow the user to post an empty comment
2134                                 if ( $this->textbox1 == '' ) {
2135                                         $this->missingComment = true;
2136                                         $status->fatal( 'missingcommenttext' );
2137                                         $status->value = self::AS_TEXTBOX_EMPTY;
2138                                         return $status;
2139                                 }
2140                         } elseif ( !$this->allowBlankSummary
2141                                 && !$content->equals( $this->getOriginalContent( $user ) )
2142                                 && !$content->isRedirect()
2143                                 && md5( $this->summary ) == $this->autoSumm
2144                         ) {
2145                                 $this->missingSummary = true;
2146                                 $status->fatal( 'missingsummary' );
2147                                 $status->value = self::AS_SUMMARY_NEEDED;
2148                                 return $status;
2149                         }
2150
2151                         # All's well
2152                         $sectionanchor = '';
2153                         if ( $this->section == 'new' ) {
2154                                 $this->summary = $this->newSectionSummary( $sectionanchor );
2155                         } elseif ( $this->section != '' ) {
2156                                 # Try to get a section anchor from the section source, redirect
2157                                 # to edited section if header found.
2158                                 # XXX: Might be better to integrate this into Article::replaceSectionAtRev
2159                                 # for duplicate heading checking and maybe parsing.
2160                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
2161                                 # We can't deal with anchors, includes, html etc in the header for now,
2162                                 # headline would need to be parsed to improve this.
2163                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
2164                                         $sectionanchor = $this->guessSectionName( $matches[2] );
2165                                 }
2166                         }
2167                         $result['sectionanchor'] = $sectionanchor;
2168
2169                         // Save errors may fall down to the edit form, but we've now
2170                         // merged the section into full text. Clear the section field
2171                         // so that later submission of conflict forms won't try to
2172                         // replace that into a duplicated mess.
2173                         $this->textbox1 = $this->toEditText( $content );
2174                         $this->section = '';
2175
2176                         $status->value = self::AS_SUCCESS_UPDATE;
2177                 }
2178
2179                 if ( !$this->allowSelfRedirect
2180                         && $content->isRedirect()
2181                         && $content->getRedirectTarget()->equals( $this->getTitle() )
2182                 ) {
2183                         // If the page already redirects to itself, don't warn.
2184                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
2185                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
2186                                 $this->selfRedirect = true;
2187                                 $status->fatal( 'selfredirect' );
2188                                 $status->value = self::AS_SELF_REDIRECT;
2189                                 return $status;
2190                         }
2191                 }
2192
2193                 // Check for length errors again now that the section is merged in
2194                 $this->contentLength = strlen( $this->toEditText( $content ) );
2195                 if ( $this->contentLength > $maxArticleSize * 1024 ) {
2196                         $this->tooBig = true;
2197                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
2198                         return $status;
2199                 }
2200
2201                 $flags = EDIT_AUTOSUMMARY |
2202                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
2203                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
2204                         ( $bot ? EDIT_FORCE_BOT : 0 );
2205
2206                 $doEditStatus = $this->page->doEditContent(
2207                         $content,
2208                         $this->summary,
2209                         $flags,
2210                         false,
2211                         $user,
2212                         $content->getDefaultFormat(),
2213                         $this->changeTags,
2214                         $this->undidRev
2215                 );
2216
2217                 if ( !$doEditStatus->isOK() ) {
2218                         // Failure from doEdit()
2219                         // Show the edit conflict page for certain recognized errors from doEdit(),
2220                         // but don't show it for errors from extension hooks
2221                         $errors = $doEditStatus->getErrorsArray();
2222                         if ( in_array( $errors[0][0],
2223                                         [ 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ] )
2224                         ) {
2225                                 $this->isConflict = true;
2226                                 // Destroys data doEdit() put in $status->value but who cares
2227                                 $doEditStatus->value = self::AS_END;
2228                         }
2229                         return $doEditStatus;
2230                 }
2231
2232                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
2233                 if ( $result['nullEdit'] ) {
2234                         // We don't know if it was a null edit until now, so increment here
2235                         $user->pingLimiter( 'linkpurge' );
2236                 }
2237                 $result['redirect'] = $content->isRedirect();
2238
2239                 $this->updateWatchlist();
2240
2241                 // If the content model changed, add a log entry
2242                 if ( $changingContentModel ) {
2243                         $this->addContentModelChangeLogEntry(
2244                                 $user,
2245                                 $new ? false : $oldContentModel,
2246                                 $this->contentModel,
2247                                 $this->summary
2248                         );
2249                 }
2250
2251                 return $status;
2252         }
2253
2254         /**
2255          * @param User $user
2256          * @param string|false $oldModel false if the page is being newly created
2257          * @param string $newModel
2258          * @param string $reason
2259          */
2260         protected function addContentModelChangeLogEntry( User $user, $oldModel, $newModel, $reason ) {
2261                 $new = $oldModel === false;
2262                 $log = new ManualLogEntry( 'contentmodel', $new ? 'new' : 'change' );
2263                 $log->setPerformer( $user );
2264                 $log->setTarget( $this->mTitle );
2265                 $log->setComment( $reason );
2266                 $log->setParameters( [
2267                         '4::oldmodel' => $oldModel,
2268                         '5::newmodel' => $newModel
2269                 ] );
2270                 $logid = $log->insert();
2271                 $log->publish( $logid );
2272         }
2273
2274         /**
2275          * Register the change of watch status
2276          */
2277         protected function updateWatchlist() {
2278                 $user = $this->context->getUser();
2279                 if ( !$user->isLoggedIn() ) {
2280                         return;
2281                 }
2282
2283                 $title = $this->mTitle;
2284                 $watch = $this->watchthis;
2285                 // Do this in its own transaction to reduce contention...
2286                 DeferredUpdates::addCallableUpdate( function () use ( $user, $title, $watch ) {
2287                         if ( $watch == $user->isWatched( $title, User::IGNORE_USER_RIGHTS ) ) {
2288                                 return; // nothing to change
2289                         }
2290                         WatchAction::doWatchOrUnwatch( $watch, $title, $user );
2291                 } );
2292         }
2293
2294         /**
2295          * Attempts to do 3-way merge of edit content with a base revision
2296          * and current content, in case of edit conflict, in whichever way appropriate
2297          * for the content type.
2298          *
2299          * @since 1.21
2300          *
2301          * @param Content $editContent
2302          *
2303          * @return bool
2304          */
2305         private function mergeChangesIntoContent( &$editContent ) {
2306                 $db = wfGetDB( DB_MASTER );
2307
2308                 // This is the revision the editor started from
2309                 $baseRevision = $this->getBaseRevision();
2310                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
2311
2312                 if ( is_null( $baseContent ) ) {
2313                         return false;
2314                 }
2315
2316                 // The current state, we want to merge updates into it
2317                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2318                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2319
2320                 if ( is_null( $currentContent ) ) {
2321                         return false;
2322                 }
2323
2324                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2325
2326                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2327
2328                 if ( $result ) {
2329                         $editContent = $result;
2330                         // Update parentRevId to what we just merged.
2331                         $this->parentRevId = $currentRevision->getId();
2332                         return true;
2333                 }
2334
2335                 return false;
2336         }
2337
2338         /**
2339          * @note: this method is very poorly named. If the user opened the form with ?oldid=X,
2340          *        one might think of X as the "base revision", which is NOT what this returns.
2341          * @return Revision|null Current version when the edit was started
2342          */
2343         public function getBaseRevision() {
2344                 if ( !$this->mBaseRevision ) {
2345                         $db = wfGetDB( DB_MASTER );
2346                         $this->mBaseRevision = $this->editRevId
2347                                 ? Revision::newFromId( $this->editRevId, Revision::READ_LATEST )
2348                                 : Revision::loadFromTimestamp( $db, $this->mTitle, $this->edittime );
2349                 }
2350                 return $this->mBaseRevision;
2351         }
2352
2353         /**
2354          * Check given input text against $wgSpamRegex, and return the text of the first match.
2355          *
2356          * @param string $text
2357          *
2358          * @return string|bool Matching string or false
2359          */
2360         public static function matchSpamRegex( $text ) {
2361                 global $wgSpamRegex;
2362                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2363                 $regexes = (array)$wgSpamRegex;
2364                 return self::matchSpamRegexInternal( $text, $regexes );
2365         }
2366
2367         /**
2368          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2369          *
2370          * @param string $text
2371          *
2372          * @return string|bool Matching string or false
2373          */
2374         public static function matchSummarySpamRegex( $text ) {
2375                 global $wgSummarySpamRegex;
2376                 $regexes = (array)$wgSummarySpamRegex;
2377                 return self::matchSpamRegexInternal( $text, $regexes );
2378         }
2379
2380         /**
2381          * @param string $text
2382          * @param array $regexes
2383          * @return bool|string
2384          */
2385         protected static function matchSpamRegexInternal( $text, $regexes ) {
2386                 foreach ( $regexes as $regex ) {
2387                         $matches = [];
2388                         if ( preg_match( $regex, $text, $matches ) ) {
2389                                 return $matches[0];
2390                         }
2391                 }
2392                 return false;
2393         }
2394
2395         public function setHeaders() {
2396                 $out = $this->context->getOutput();
2397
2398                 $out->addModules( 'mediawiki.action.edit' );
2399                 $out->addModuleStyles( 'mediawiki.action.edit.styles' );
2400                 $out->addModuleStyles( 'mediawiki.editfont.styles' );
2401
2402                 $user = $this->context->getUser();
2403                 if ( $user->getOption( 'showtoolbar' ) ) {
2404                         // The addition of default buttons is handled by getEditToolbar() which
2405                         // has its own dependency on this module. The call here ensures the module
2406                         // is loaded in time (it has position "top") for other modules to register
2407                         // buttons (e.g. extensions, gadgets, user scripts).
2408                         $out->addModules( 'mediawiki.toolbar' );
2409                 }
2410
2411                 if ( $user->getOption( 'uselivepreview' ) ) {
2412                         $out->addModules( 'mediawiki.action.edit.preview' );
2413                 }
2414
2415                 if ( $user->getOption( 'useeditwarning' ) ) {
2416                         $out->addModules( 'mediawiki.action.edit.editWarning' );
2417                 }
2418
2419                 # Enabled article-related sidebar, toplinks, etc.
2420                 $out->setArticleRelated( true );
2421
2422                 $contextTitle = $this->getContextTitle();
2423                 if ( $this->isConflict ) {
2424                         $msg = 'editconflict';
2425                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2426                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2427                 } else {
2428                         $msg = $contextTitle->exists()
2429                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2430                                         && $contextTitle->getDefaultMessageText() !== false
2431                                 )
2432                                 ? 'editing'
2433                                 : 'creating';
2434                 }
2435
2436                 # Use the title defined by DISPLAYTITLE magic word when present
2437                 # NOTE: getDisplayTitle() returns HTML while getPrefixedText() returns plain text.
2438                 #       setPageTitle() treats the input as wikitext, which should be safe in either case.
2439                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2440                 if ( $displayTitle === false ) {
2441                         $displayTitle = $contextTitle->getPrefixedText();
2442                 }
2443                 $out->setPageTitle( $this->context->msg( $msg, $displayTitle ) );
2444
2445                 $config = $this->context->getConfig();
2446
2447                 # Transmit the name of the message to JavaScript for live preview
2448                 # Keep Resources.php/mediawiki.action.edit.preview in sync with the possible keys
2449                 $out->addJsConfigVars( [
2450                         'wgEditMessage' => $msg,
2451                         'wgAjaxEditStash' => $config->get( 'AjaxEditStash' ),
2452                 ] );
2453
2454                 // Add whether to use 'save' or 'publish' messages to JavaScript for post-edit, other
2455                 // editors, etc.
2456                 $out->addJsConfigVars(
2457                         'wgEditSubmitButtonLabelPublish',
2458                         $config->get( 'EditSubmitButtonLabelPublish' )
2459                 );
2460         }
2461
2462         /**
2463          * Show all applicable editing introductions
2464          */
2465         protected function showIntro() {
2466                 if ( $this->suppressIntro ) {
2467                         return;
2468                 }
2469
2470                 $out = $this->context->getOutput();
2471                 $namespace = $this->mTitle->getNamespace();
2472
2473                 if ( $namespace == NS_MEDIAWIKI ) {
2474                         # Show a warning if editing an interface message
2475                         $out->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2476                         # If this is a default message (but not css or js),
2477                         # show a hint that it is translatable on translatewiki.net
2478                         if ( !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2479                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2480                         ) {
2481                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2482                                 if ( $defaultMessageText !== false ) {
2483                                         $out->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2484                                                 'translateinterface' );
2485                                 }
2486                         }
2487                 } elseif ( $namespace == NS_FILE ) {
2488                         # Show a hint to shared repo
2489                         $file = wfFindFile( $this->mTitle );
2490                         if ( $file && !$file->isLocal() ) {
2491                                 $descUrl = $file->getDescriptionUrl();
2492                                 # there must be a description url to show a hint to shared repo
2493                                 if ( $descUrl ) {
2494                                         if ( !$this->mTitle->exists() ) {
2495                                                 $out->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", [
2496                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2497                                                 ] );
2498                                         } else {
2499                                                 $out->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", [
2500                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2501                                                 ] );
2502                                         }
2503                                 }
2504                         }
2505                 }
2506
2507                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2508                 # Show log extract when the user is currently blocked
2509                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2510                         $username = explode( '/', $this->mTitle->getText(), 2 )[0];
2511                         $user = User::newFromName( $username, false /* allow IP users */ );
2512                         $ip = User::isIP( $username );
2513                         $block = Block::newFromTarget( $user, $user );
2514                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2515                                 $out->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2516                                         [ 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ] );
2517                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
2518                                 # Show log extract if the user is currently blocked
2519                                 LogEventsList::showLogExtract(
2520                                         $out,
2521                                         'block',
2522                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2523                                         '',
2524                                         [
2525                                                 'lim' => 1,
2526                                                 'showIfEmpty' => false,
2527                                                 'msgKey' => [
2528                                                         'blocked-notice-logextract',
2529                                                         $user->getName() # Support GENDER in notice
2530                                                 ]
2531                                         ]
2532                                 );
2533                         }
2534                 }
2535                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2536                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2537                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2538                                 $this->context->msg( 'helppage' )->inContentLanguage()->text()
2539                         ) );
2540                         if ( $this->context->getUser()->isLoggedIn() ) {
2541                                 $out->wrapWikiMsg(
2542                                         // Suppress the external link icon, consider the help url an internal one
2543                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2544                                         [
2545                                                 'newarticletext',
2546                                                 $helpLink
2547                                         ]
2548                                 );
2549                         } else {
2550                                 $out->wrapWikiMsg(
2551                                         // Suppress the external link icon, consider the help url an internal one
2552                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2553                                         [
2554                                                 'newarticletextanon',
2555                                                 $helpLink
2556                                         ]
2557                                 );
2558                         }
2559                 }
2560                 # Give a notice if the user is editing a deleted/moved page...
2561                 if ( !$this->mTitle->exists() ) {
2562                         $dbr = wfGetDB( DB_REPLICA );
2563
2564                         LogEventsList::showLogExtract( $out, [ 'delete', 'move' ], $this->mTitle,
2565                                 '',
2566                                 [
2567                                         'lim' => 10,
2568                                         'conds' => [ 'log_action != ' . $dbr->addQuotes( 'revision' ) ],
2569                                         'showIfEmpty' => false,
2570                                         'msgKey' => [ 'recreate-moveddeleted-warn' ]
2571                                 ]
2572                         );
2573                 }
2574         }
2575
2576         /**
2577          * Attempt to show a custom editing introduction, if supplied
2578          *
2579          * @return bool
2580          */
2581         protected function showCustomIntro() {
2582                 if ( $this->editintro ) {
2583                         $title = Title::newFromText( $this->editintro );
2584                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2585                                 // Added using template syntax, to take <noinclude>'s into account.
2586                                 $this->context->getOutput()->addWikiTextTitleTidy(
2587                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2588                                         $this->mTitle
2589                                 );
2590                                 return true;
2591                         }
2592                 }
2593                 return false;
2594         }
2595
2596         /**
2597          * Gets an editable textual representation of $content.
2598          * The textual representation can be turned by into a Content object by the
2599          * toEditContent() method.
2600          *
2601          * If $content is null or false or a string, $content is returned unchanged.
2602          *
2603          * If the given Content object is not of a type that can be edited using
2604          * the text base EditPage, an exception will be raised. Set
2605          * $this->allowNonTextContent to true to allow editing of non-textual
2606          * content.
2607          *
2608          * @param Content|null|bool|string $content
2609          * @return string The editable text form of the content.
2610          *
2611          * @throws MWException If $content is not an instance of TextContent and
2612          *   $this->allowNonTextContent is not true.
2613          */
2614         protected function toEditText( $content ) {
2615                 if ( $content === null || $content === false || is_string( $content ) ) {
2616                         return $content;
2617                 }
2618
2619                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2620                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2621                 }
2622
2623                 return $content->serialize( $this->contentFormat );
2624         }
2625
2626         /**
2627          * Turns the given text into a Content object by unserializing it.
2628          *
2629          * If the resulting Content object is not of a type that can be edited using
2630          * the text base EditPage, an exception will be raised. Set
2631          * $this->allowNonTextContent to true to allow editing of non-textual
2632          * content.
2633          *
2634          * @param string|null|bool $text Text to unserialize
2635          * @return Content|bool|null The content object created from $text. If $text was false
2636          *   or null, false resp. null will be  returned instead.
2637          *
2638          * @throws MWException If unserializing the text results in a Content
2639          *   object that is not an instance of TextContent and
2640          *   $this->allowNonTextContent is not true.
2641          */
2642         protected function toEditContent( $text ) {
2643                 if ( $text === false || $text === null ) {
2644                         return $text;
2645                 }
2646
2647                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2648                         $this->contentModel, $this->contentFormat );
2649
2650                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2651                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2652                 }
2653
2654                 return $content;
2655         }
2656
2657         /**
2658          * Send the edit form and related headers to OutputPage
2659          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2660          *     during form output near the top, for captchas and the like.
2661          *
2662          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2663          * use the EditPage::showEditForm:fields hook instead.
2664          */
2665         public function showEditForm( $formCallback = null ) {
2666                 # need to parse the preview early so that we know which templates are used,
2667                 # otherwise users with "show preview after edit box" will get a blank list
2668                 # we parse this near the beginning so that setHeaders can do the title
2669                 # setting work instead of leaving it in getPreviewText
2670                 $previewOutput = '';
2671                 if ( $this->formtype == 'preview' ) {
2672                         $previewOutput = $this->getPreviewText();
2673                 }
2674
2675                 $out = $this->context->getOutput();
2676
2677                 // Avoid PHP 7.1 warning of passing $this by reference
2678                 $editPage = $this;
2679                 Hooks::run( 'EditPage::showEditForm:initial', [ &$editPage, &$out ] );
2680
2681                 $this->setHeaders();
2682
2683                 $this->addTalkPageText();
2684                 $this->addEditNotices();
2685
2686                 if ( !$this->isConflict &&
2687                         $this->section != '' &&
2688                         !$this->isSectionEditSupported() ) {
2689                         // We use $this->section to much before this and getVal('wgSection') directly in other places
2690                         // at this point we can't reset $this->section to '' to fallback to non-section editing.
2691                         // Someone is welcome to try refactoring though
2692                         $out->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2693                         return;
2694                 }
2695
2696                 $this->showHeader();
2697
2698                 $out->addHTML( $this->editFormPageTop );
2699
2700                 $user = $this->context->getUser();
2701                 if ( $user->getOption( 'previewontop' ) ) {
2702                         $this->displayPreviewArea( $previewOutput, true );
2703                 }
2704
2705                 $out->addHTML( $this->editFormTextTop );
2706
2707                 $showToolbar = true;
2708                 if ( $this->wasDeletedSinceLastEdit() ) {
2709                         if ( $this->formtype == 'save' ) {
2710                                 // Hide the toolbar and edit area, user can click preview to get it back
2711                                 // Add an confirmation checkbox and explanation.
2712                                 $showToolbar = false;
2713                         } else {
2714                                 $out->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2715                                         'deletedwhileediting' );
2716                         }
2717                 }
2718
2719                 // @todo add EditForm plugin interface and use it here!
2720                 //       search for textarea1 and textarea2, and allow EditForm to override all uses.
2721                 $out->addHTML( Html::openElement(
2722                         'form',
2723                         [
2724                                 'class' => 'mw-editform',
2725                                 'id' => self::EDITFORM_ID,
2726                                 'name' => self::EDITFORM_ID,
2727                                 'method' => 'post',
2728                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2729                                 'enctype' => 'multipart/form-data'
2730                         ]
2731                 ) );
2732
2733                 if ( is_callable( $formCallback ) ) {
2734                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2735                         call_user_func_array( $formCallback, [ &$out ] );
2736                 }
2737
2738                 // Add a check for Unicode support
2739                 $out->addHTML( Html::hidden( 'wpUnicodeCheck', self::UNICODE_CHECK ) );
2740
2741                 // Add an empty field to trip up spambots
2742                 $out->addHTML(
2743                         Xml::openElement( 'div', [ 'id' => 'antispam-container', 'style' => 'display: none;' ] )
2744                         . Html::rawElement(
2745                                 'label',
2746                                 [ 'for' => 'wpAntispam' ],
2747                                 $this->context->msg( 'simpleantispam-label' )->parse()
2748                         )
2749                         . Xml::element(
2750                                 'input',
2751                                 [
2752                                         'type' => 'text',
2753                                         'name' => 'wpAntispam',
2754                                         'id' => 'wpAntispam',
2755                                         'value' => ''
2756                                 ]
2757                         )
2758                         . Xml::closeElement( 'div' )
2759                 );
2760
2761                 // Avoid PHP 7.1 warning of passing $this by reference
2762                 $editPage = $this;
2763                 Hooks::run( 'EditPage::showEditForm:fields', [ &$editPage, &$out ] );
2764
2765                 // Put these up at the top to ensure they aren't lost on early form submission
2766                 $this->showFormBeforeText();
2767
2768                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2769                         $username = $this->lastDelete->user_name;
2770                         $comment = CommentStore::getStore()
2771                                 ->getComment( 'log_comment', $this->lastDelete )->text;
2772
2773                         // It is better to not parse the comment at all than to have templates expanded in the middle
2774                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2775                         $key = $comment === ''
2776                                 ? 'confirmrecreate-noreason'
2777                                 : 'confirmrecreate';
2778                         $out->addHTML(
2779                                 '<div class="mw-confirm-recreate">' .
2780                                         $this->context->msg( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2781                                 Xml::checkLabel( $this->context->msg( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2782                                         [ 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' ]
2783                                 ) .
2784                                 '</div>'
2785                         );
2786                 }
2787
2788                 # When the summary is hidden, also hide them on preview/show changes
2789                 if ( $this->nosummary ) {
2790                         $out->addHTML( Html::hidden( 'nosummary', true ) );
2791                 }
2792
2793                 # If a blank edit summary was previously provided, and the appropriate
2794                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2795                 # user being bounced back more than once in the event that a summary
2796                 # is not required.
2797                 # ####
2798                 # For a bit more sophisticated detection of blank summaries, hash the
2799                 # automatic one and pass that in the hidden field wpAutoSummary.
2800                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2801                         $out->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2802                 }
2803
2804                 if ( $this->undidRev ) {
2805                         $out->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2806                 }
2807
2808                 if ( $this->selfRedirect ) {
2809                         $out->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2810                 }
2811
2812                 if ( $this->hasPresetSummary ) {
2813                         // If a summary has been preset using &summary= we don't want to prompt for
2814                         // a different summary. Only prompt for a summary if the summary is blanked.
2815                         // (T19416)
2816                         $this->autoSumm = md5( '' );
2817                 }
2818
2819                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2820                 $out->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2821
2822                 $out->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2823                 $out->addHTML( Html::hidden( 'parentRevId', $this->getParentRevId() ) );
2824
2825                 $out->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2826                 $out->addHTML( Html::hidden( 'model', $this->contentModel ) );
2827
2828                 $out->enableOOUI();
2829
2830                 if ( $this->section == 'new' ) {
2831                         $this->showSummaryInput( true, $this->summary );
2832                         $out->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2833                 }
2834
2835                 $out->addHTML( $this->editFormTextBeforeContent );
2836                 if ( $this->isConflict ) {
2837                         // In an edit conflict, we turn textbox2 into the user's text,
2838                         // and textbox1 into the stored version
2839                         $this->textbox2 = $this->textbox1;
2840
2841                         $content = $this->getCurrentContent();
2842                         $this->textbox1 = $this->toEditText( $content );
2843
2844                         $editConflictHelper = $this->getEditConflictHelper();
2845                         $editConflictHelper->setTextboxes( $this->textbox2, $this->textbox1 );
2846                         $editConflictHelper->setContentModel( $this->contentModel );
2847                         $editConflictHelper->setContentFormat( $this->contentFormat );
2848                         $out->addHTML( $editConflictHelper->getEditFormHtmlBeforeContent() );
2849                 }
2850
2851                 if ( !$this->mTitle->isUserConfigPage() && $showToolbar && $user->getOption( 'showtoolbar' ) ) {
2852                         $out->addHTML( self::getEditToolbar( $this->mTitle ) );
2853                 }
2854
2855                 if ( $this->blankArticle ) {
2856                         $out->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2857                 }
2858
2859                 if ( $this->isConflict ) {
2860                         // In an edit conflict bypass the overridable content form method
2861                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2862                         // resolved between page source edits and custom ui edits using the
2863                         // custom edit ui.
2864                         $conflictTextBoxAttribs = [];
2865                         if ( $this->wasDeletedSinceLastEdit() ) {
2866                                 $conflictTextBoxAttribs['style'] = 'display:none;';
2867                         } elseif ( $this->isOldRev ) {
2868                                 $conflictTextBoxAttribs['class'] = 'mw-textarea-oldrev';
2869                         }
2870
2871                         $out->addHTML( $editConflictHelper->getEditConflictMainTextBox( $conflictTextBoxAttribs ) );
2872                         $out->addHTML( $editConflictHelper->getEditFormHtmlAfterContent() );
2873                 } else {
2874                         $this->showContentForm();
2875                 }
2876
2877                 $out->addHTML( $this->editFormTextAfterContent );
2878
2879                 $this->showStandardInputs();
2880
2881                 $this->showFormAfterText();
2882
2883                 $this->showTosSummary();
2884
2885                 $this->showEditTools();
2886
2887                 $out->addHTML( $this->editFormTextAfterTools . "\n" );
2888
2889                 $out->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
2890
2891                 $out->addHTML( Html::rawElement( 'div', [ 'class' => 'hiddencats' ],
2892                         Linker::formatHiddenCategories( $this->page->getHiddenCategories() ) ) );
2893
2894                 $out->addHTML( Html::rawElement( 'div', [ 'class' => 'limitreport' ],
2895                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2896
2897                 $out->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2898
2899                 if ( $this->isConflict ) {
2900                         try {
2901                                 $this->showConflict();
2902                         } catch ( MWContentSerializationException $ex ) {
2903                                 // this can't really happen, but be nice if it does.
2904                                 $msg = $this->context->msg(
2905                                         'content-failed-to-parse',
2906                                         $this->contentModel,
2907                                         $this->contentFormat,
2908                                         $ex->getMessage()
2909                                 );
2910                                 $out->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2911                         }
2912                 }
2913
2914                 // Set a hidden field so JS knows what edit form mode we are in
2915                 if ( $this->isConflict ) {
2916                         $mode = 'conflict';
2917                 } elseif ( $this->preview ) {
2918                         $mode = 'preview';
2919                 } elseif ( $this->diff ) {
2920                         $mode = 'diff';
2921                 } else {
2922                         $mode = 'text';
2923                 }
2924                 $out->addHTML( Html::hidden( 'mode', $mode, [ 'id' => 'mw-edit-mode' ] ) );
2925
2926                 // Marker for detecting truncated form data.  This must be the last
2927                 // parameter sent in order to be of use, so do not move me.
2928                 $out->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2929                 $out->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2930
2931                 if ( !$user->getOption( 'previewontop' ) ) {
2932                         $this->displayPreviewArea( $previewOutput, false );
2933                 }
2934         }
2935
2936         /**
2937          * Wrapper around TemplatesOnThisPageFormatter to make
2938          * a "templates on this page" list.
2939          *
2940          * @param Title[] $templates
2941          * @return string HTML
2942          */
2943         public function makeTemplatesOnThisPageList( array $templates ) {
2944                 $templateListFormatter = new TemplatesOnThisPageFormatter(
2945                         $this->context, MediaWikiServices::getInstance()->getLinkRenderer()
2946                 );
2947
2948                 // preview if preview, else section if section, else false
2949                 $type = false;
2950                 if ( $this->preview ) {
2951                         $type = 'preview';
2952                 } elseif ( $this->section != '' ) {
2953                         $type = 'section';
2954                 }
2955
2956                 return Html::rawElement( 'div', [ 'class' => 'templatesUsed' ],
2957                         $templateListFormatter->format( $templates, $type )
2958                 );
2959         }
2960
2961         /**
2962          * Extract the section title from current section text, if any.
2963          *
2964          * @param string $text
2965          * @return string|bool String or false
2966          */
2967         public static function extractSectionTitle( $text ) {
2968                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2969                 if ( !empty( $matches[2] ) ) {
2970                         global $wgParser;
2971                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2972                 } else {
2973                         return false;
2974                 }
2975         }
2976
2977         protected function showHeader() {
2978                 $out = $this->context->getOutput();
2979                 $user = $this->context->getUser();
2980                 if ( $this->isConflict ) {
2981                         $this->addExplainConflictHeader( $out );
2982                         $this->editRevId = $this->page->getLatest();
2983                 } else {
2984                         if ( $this->section != '' && $this->section != 'new' ) {
2985                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2986                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); // FIXME: use Content object
2987                                         if ( $sectionTitle !== false ) {
2988                                                 $this->summary = "/* $sectionTitle */ ";
2989                                         }
2990                                 }
2991                         }
2992
2993                         $buttonLabel = $this->context->msg( $this->getSubmitButtonLabel() )->text();
2994
2995                         if ( $this->missingComment ) {
2996                                 $out->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2997                         }
2998
2999                         if ( $this->missingSummary && $this->section != 'new' ) {
3000                                 $out->wrapWikiMsg(
3001                                         "<div id='mw-missingsummary'>\n$1\n</div>",
3002                                         [ 'missingsummary', $buttonLabel ]
3003                                 );
3004                         }
3005
3006                         if ( $this->missingSummary && $this->section == 'new' ) {
3007                                 $out->wrapWikiMsg(
3008                                         "<div id='mw-missingcommentheader'>\n$1\n</div>",
3009                                         [ 'missingcommentheader', $buttonLabel ]
3010                                 );
3011                         }
3012
3013                         if ( $this->blankArticle ) {
3014                                 $out->wrapWikiMsg(
3015                                         "<div id='mw-blankarticle'>\n$1\n</div>",
3016                                         [ 'blankarticle', $buttonLabel ]
3017                                 );
3018                         }
3019
3020                         if ( $this->selfRedirect ) {
3021                                 $out->wrapWikiMsg(
3022                                         "<div id='mw-selfredirect'>\n$1\n</div>",
3023                                         [ 'selfredirect', $buttonLabel ]
3024                                 );
3025                         }
3026
3027                         if ( $this->hookError !== '' ) {
3028                                 $out->addWikiText( $this->hookError );
3029                         }
3030
3031                         if ( $this->section != 'new' ) {
3032                                 $revision = $this->mArticle->getRevisionFetched();
3033                                 if ( $revision ) {
3034                                         // Let sysop know that this will make private content public if saved
3035
3036                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $user ) ) {
3037                                                 $out->wrapWikiMsg(
3038                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
3039                                                         'rev-deleted-text-permission'
3040                                                 );
3041                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
3042                                                 $out->wrapWikiMsg(
3043                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
3044                                                         'rev-deleted-text-view'
3045                                                 );
3046                                         }
3047
3048                                         if ( !$revision->isCurrent() ) {
3049                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
3050                                                 $out->addWikiMsg( 'editingold' );
3051                                                 $this->isOldRev = true;
3052                                         }
3053                                 } elseif ( $this->mTitle->exists() ) {
3054                                         // Something went wrong
3055
3056                                         $out->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
3057                                                 [ 'missing-revision', $this->oldid ] );
3058                                 }
3059                         }
3060                 }
3061
3062                 if ( wfReadOnly() ) {
3063                         $out->wrapWikiMsg(
3064                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
3065                                 [ 'readonlywarning', wfReadOnlyReason() ]
3066                         );
3067                 } elseif ( $user->isAnon() ) {
3068                         if ( $this->formtype != 'preview' ) {
3069                                 $out->wrapWikiMsg(
3070                                         "<div id='mw-anon-edit-warning' class='warningbox'>\n$1\n</div>",
3071                                         [ 'anoneditwarning',
3072                                                 // Log-in link
3073                                                 SpecialPage::getTitleFor( 'Userlogin' )->getFullURL( [
3074                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
3075                                                 ] ),
3076                                                 // Sign-up link
3077                                                 SpecialPage::getTitleFor( 'CreateAccount' )->getFullURL( [
3078                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
3079                                                 ] )
3080                                         ]
3081                                 );
3082                         } else {
3083                                 $out->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\" class=\"warningbox\">\n$1</div>",
3084                                         'anonpreviewwarning'
3085                                 );
3086                         }
3087                 } else {
3088                         if ( $this->mTitle->isUserConfigPage() ) {
3089                                 # Check the skin exists
3090                                 if ( $this->isWrongCaseUserConfigPage() ) {
3091                                         $out->wrapWikiMsg(
3092                                                 "<div class='error' id='mw-userinvalidconfigtitle'>\n$1\n</div>",
3093                                                 [ 'userinvalidconfigtitle', $this->mTitle->getSkinFromConfigSubpage() ]
3094                                         );
3095                                 }
3096                                 if ( $this->getTitle()->isSubpageOf( $user->getUserPage() ) ) {
3097                                         $isUserCssConfig = $this->mTitle->isUserCssConfigPage();
3098
3099                                         $warning = $isUserCssConfig
3100                                                 ? 'usercssispublic'
3101                                                 : 'userjsispublic';
3102
3103                                         $out->wrapWikiMsg( '<div class="mw-userconfigpublic">$1</div>', $warning );
3104
3105                                         if ( $this->formtype !== 'preview' ) {
3106                                                 $config = $this->context->getConfig();
3107                                                 if ( $isUserCssConfig && $config->get( 'AllowUserCss' ) ) {
3108                                                         $out->wrapWikiMsg(
3109                                                                 "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
3110                                                                 [ 'usercssyoucanpreview' ]
3111                                                         );
3112                                                 }
3113
3114                                                 if ( $this->mTitle->isJsSubpage() && $config->get( 'AllowUserJs' ) ) {
3115                                                         $out->wrapWikiMsg(
3116                                                                 "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
3117                                                                 [ 'userjsyoucanpreview' ]
3118                                                         );
3119                                                 }
3120                                         }
3121                                 }
3122                         }
3123                 }
3124
3125                 $this->addPageProtectionWarningHeaders();
3126
3127                 $this->addLongPageWarningHeader();
3128
3129                 # Add header copyright warning
3130                 $this->showHeaderCopyrightWarning();
3131         }
3132
3133         /**
3134          * Helper function for summary input functions, which returns the neccessary
3135          * attributes for the input.
3136          *
3137          * @param array|null $inputAttrs Array of attrs to use on the input
3138          * @return array
3139          */
3140         private function getSummaryInputAttributes( array $inputAttrs = null ) {
3141                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
3142                 return ( is_array( $inputAttrs ) ? $inputAttrs : [] ) + [
3143                         'id' => 'wpSummary',
3144                         'name' => 'wpSummary',
3145                         'maxlength' => '200',
3146                         'tabindex' => 1,
3147                         'size' => 60,
3148                         'spellcheck' => 'true',
3149                 ];
3150         }
3151
3152         /**
3153          * Standard summary input and label (wgSummary), abstracted so EditPage
3154          * subclasses may reorganize the form.
3155          * Note that you do not need to worry about the label's for=, it will be
3156          * inferred by the id given to the input. You can remove them both by
3157          * passing [ 'id' => false ] to $userInputAttrs.
3158          *
3159          * @deprecated since 1.30 Use getSummaryInputWidget() instead
3160          * @param string $summary The value of the summary input
3161          * @param string $labelText The html to place inside the label
3162          * @param array $inputAttrs Array of attrs to use on the input
3163          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
3164          * @return array An array in the format [ $label, $input ]
3165          */
3166         public function getSummaryInput( $summary = "", $labelText = null,
3167                 $inputAttrs = null, $spanLabelAttrs = null
3168         ) {
3169                 wfDeprecated( __METHOD__, '1.30' );
3170                 $inputAttrs = $this->getSummaryInputAttributes( $inputAttrs );
3171                 $inputAttrs += Linker::tooltipAndAccesskeyAttribs( 'summary' );
3172
3173                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : [] ) + [
3174                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
3175                         'id' => "wpSummaryLabel"
3176                 ];
3177
3178                 $label = null;
3179                 if ( $labelText ) {
3180                         $label = Xml::tags(
3181                                 'label',
3182                                 $inputAttrs['id'] ? [ 'for' => $inputAttrs['id'] ] : null,
3183                                 $labelText
3184                         );
3185                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
3186                 }
3187
3188                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
3189
3190                 return [ $label, $input ];
3191         }
3192
3193         /**
3194          * Builds a standard summary input with a label.
3195          *
3196          * @deprecated since 1.30 Use getSummaryInputWidget() instead
3197          * @param string $summary The value of the summary input
3198          * @param string $labelText The html to place inside the label
3199          * @param array $inputAttrs Array of attrs to use on the input
3200          *
3201          * @return OOUI\FieldLayout OOUI FieldLayout with Label and Input
3202          */
3203         function getSummaryInputOOUI( $summary = "", $labelText = null, $inputAttrs = null ) {
3204                 wfDeprecated( __METHOD__, '1.30' );
3205                 return $this->getSummaryInputWidget( $summary, $labelText, $inputAttrs );
3206         }
3207
3208         /**
3209          * Builds a standard summary input with a label.
3210          *
3211          * @param string $summary The value of the summary input
3212          * @param string $labelText The html to place inside the label
3213          * @param array $inputAttrs Array of attrs to use on the input
3214          *
3215          * @return OOUI\FieldLayout OOUI FieldLayout with Label and Input
3216          */
3217         function getSummaryInputWidget( $summary = "", $labelText = null, $inputAttrs = null ) {
3218                 $inputAttrs = OOUI\Element::configFromHtmlAttributes(
3219                         $this->getSummaryInputAttributes( $inputAttrs )
3220                 );
3221                 $inputAttrs += [
3222                         'title' => Linker::titleAttrib( 'summary' ),
3223                         'accessKey' => Linker::accesskey( 'summary' ),
3224                 ];
3225
3226                 // For compatibility with old scripts and extensions, we want the legacy 'id' on the `<input>`
3227                 $inputAttrs['inputId'] = $inputAttrs['id'];
3228                 $inputAttrs['id'] = 'wpSummaryWidget';
3229
3230                 return new OOUI\FieldLayout(
3231                         new OOUI\TextInputWidget( [
3232                                 'value' => $summary,
3233                                 'infusable' => true,
3234                         ] + $inputAttrs ),
3235                         [
3236                                 'label' => new OOUI\HtmlSnippet( $labelText ),
3237                                 'align' => 'top',
3238                                 'id' => 'wpSummaryLabel',
3239                                 'classes' => [ $this->missingSummary ? 'mw-summarymissed' : 'mw-summary' ],
3240                         ]
3241                 );
3242         }
3243
3244         /**
3245          * @param bool $isSubjectPreview True if this is the section subject/title
3246          *   up top, or false if this is the comment summary
3247          *   down below the textarea
3248          * @param string $summary The text of the summary to display
3249          */
3250         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
3251                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
3252                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
3253                 if ( $isSubjectPreview ) {
3254                         if ( $this->nosummary ) {
3255                                 return;
3256                         }
3257                 } else {
3258                         if ( !$this->mShowSummaryField ) {
3259                                 return;
3260                         }
3261                 }
3262
3263                 $labelText = $this->context->msg( $isSubjectPreview ? 'subject' : 'summary' )->parse();
3264                 $this->context->getOutput()->addHTML( $this->getSummaryInputWidget(
3265                                 $summary,
3266                                 $labelText,
3267                                 [ 'class' => $summaryClass ]
3268                         ) );
3269         }
3270
3271         /**
3272          * @param bool $isSubjectPreview True if this is the section subject/title
3273          *   up top, or false if this is the comment summary
3274          *   down below the textarea
3275          * @param string $summary The text of the summary to display
3276          * @return string
3277          */
3278         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
3279                 // avoid spaces in preview, gets always trimmed on save
3280                 $summary = trim( $summary );
3281                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
3282                         return "";
3283                 }
3284
3285                 global $wgParser;
3286
3287                 if ( $isSubjectPreview ) {
3288                         $summary = $this->context->msg( 'newsectionsummary' )
3289                                 ->rawParams( $wgParser->stripSectionName( $summary ) )
3290                                 ->inContentLanguage()->text();
3291                 }
3292
3293                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
3294
3295                 $summary = $this->context->msg( $message )->parse()
3296                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
3297                 return Xml::tags( 'div', [ 'class' => 'mw-summary-preview' ], $summary );
3298         }
3299
3300         protected function showFormBeforeText() {
3301                 $out = $this->context->getOutput();
3302                 $out->addHTML( Html::hidden( 'wpSection', $this->section ) );
3303                 $out->addHTML( Html::hidden( 'wpStarttime', $this->starttime ) );
3304                 $out->addHTML( Html::hidden( 'wpEdittime', $this->edittime ) );
3305                 $out->addHTML( Html::hidden( 'editRevId', $this->editRevId ) );
3306                 $out->addHTML( Html::hidden( 'wpScrolltop', $this->scrolltop, [ 'id' => 'wpScrolltop' ] ) );
3307         }
3308
3309         protected function showFormAfterText() {
3310                 /**
3311                  * To make it harder for someone to slip a user a page
3312                  * which submits an edit form to the wiki without their
3313                  * knowledge, a random token is associated with the login
3314                  * session. If it's not passed back with the submission,
3315                  * we won't save the page, or render user JavaScript and
3316                  * CSS previews.
3317                  *
3318                  * For anon editors, who may not have a session, we just
3319                  * include the constant suffix to prevent editing from
3320                  * broken text-mangling proxies.
3321                  */
3322                 $this->context->getOutput()->addHTML(
3323                         "\n" .
3324                         Html::hidden( "wpEditToken", $this->context->getUser()->getEditToken() ) .
3325                         "\n"
3326                 );
3327         }
3328
3329         /**
3330          * Subpage overridable method for printing the form for page content editing
3331          * By default this simply outputs wpTextbox1
3332          * Subclasses can override this to provide a custom UI for editing;
3333          * be it a form, or simply wpTextbox1 with a modified content that will be
3334          * reverse modified when extracted from the post data.
3335          * Note that this is basically the inverse for importContentFormData
3336          */
3337         protected function showContentForm() {
3338                 $this->showTextbox1();
3339         }
3340
3341         /**
3342          * Method to output wpTextbox1
3343          * The $textoverride method can be used by subclasses overriding showContentForm
3344          * to pass back to this method.
3345          *
3346          * @param array $customAttribs Array of html attributes to use in the textarea
3347          * @param string $textoverride Optional text to override $this->textarea1 with
3348          */
3349         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
3350                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
3351                         $attribs = [ 'style' => 'display:none;' ];
3352                 } else {
3353                         $builder = new TextboxBuilder();
3354                         $classes = $builder->getTextboxProtectionCSSClasses( $this->getTitle() );
3355
3356                         # Is an old revision being edited?
3357                         if ( $this->isOldRev ) {
3358                                 $classes[] = 'mw-textarea-oldrev';
3359                         }
3360
3361                         $attribs = [ 'tabindex' => 1 ];
3362
3363                         if ( is_array( $customAttribs ) ) {
3364                                 $attribs += $customAttribs;
3365                         }
3366
3367                         $attribs = $builder->mergeClassesIntoAttributes( $classes, $attribs );
3368                 }
3369
3370                 $this->showTextbox(
3371                         $textoverride !== null ? $textoverride : $this->textbox1,
3372                         'wpTextbox1',
3373                         $attribs
3374                 );
3375         }
3376
3377         protected function showTextbox2() {
3378                 $this->showTextbox( $this->textbox2, 'wpTextbox2', [ 'tabindex' => 6, 'readonly' ] );
3379         }
3380
3381         protected function showTextbox( $text, $name, $customAttribs = [] ) {
3382                 $builder = new TextboxBuilder();
3383                 $attribs = $builder->buildTextboxAttribs(
3384                         $name,
3385                         $customAttribs,
3386                         $this->context->getUser(),
3387                         $this->mTitle
3388                 );
3389
3390                 $this->context->getOutput()->addHTML(
3391                         Html::textarea( $name, $builder->addNewLineAtEnd( $text ), $attribs )
3392                 );
3393         }
3394
3395         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
3396                 $classes = [];
3397                 if ( $isOnTop ) {
3398                         $classes[] = 'ontop';
3399                 }
3400
3401                 $attribs = [ 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) ];
3402
3403                 if ( $this->formtype != 'preview' ) {
3404                         $attribs['style'] = 'display: none;';
3405                 }
3406
3407                 $out = $this->context->getOutput();
3408                 $out->addHTML( Xml::openElement( 'div', $attribs ) );
3409
3410                 if ( $this->formtype == 'preview' ) {
3411                         $this->showPreview( $previewOutput );
3412                 } else {
3413                         // Empty content container for LivePreview
3414                         $pageViewLang = $this->mTitle->getPageViewLanguage();
3415                         $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3416                                 'class' => 'mw-content-' . $pageViewLang->getDir() ];
3417                         $out->addHTML( Html::rawElement( 'div', $attribs ) );
3418                 }
3419
3420                 $out->addHTML( '</div>' );
3421
3422                 if ( $this->formtype == 'diff' ) {
3423                         try {
3424                                 $this->showDiff();
3425                         } catch ( MWContentSerializationException $ex ) {
3426                                 $msg = $this->context->msg(
3427                                         'content-failed-to-parse',
3428                                         $this->contentModel,
3429                                         $this->contentFormat,
3430                                         $ex->getMessage()
3431                                 );
3432                                 $out->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3433                         }
3434                 }
3435         }
3436
3437         /**
3438          * Append preview output to OutputPage.
3439          * Includes category rendering if this is a category page.
3440          *
3441          * @param string $text The HTML to be output for the preview.
3442          */
3443         protected function showPreview( $text ) {
3444                 if ( $this->mArticle instanceof CategoryPage ) {
3445                         $this->mArticle->openShowCategory();
3446                 }
3447                 # This hook seems slightly odd here, but makes things more
3448                 # consistent for extensions.
3449                 $out = $this->context->getOutput();
3450                 Hooks::run( 'OutputPageBeforeHTML', [ &$out, &$text ] );
3451                 $out->addHTML( $text );
3452                 if ( $this->mArticle instanceof CategoryPage ) {
3453                         $this->mArticle->closeShowCategory();
3454                 }
3455         }
3456
3457         /**
3458          * Get a diff between the current contents of the edit box and the
3459          * version of the page we're editing from.
3460          *
3461          * If this is a section edit, we'll replace the section as for final
3462          * save and then make a comparison.
3463          */
3464         public function showDiff() {
3465                 global $wgContLang;
3466
3467                 $oldtitlemsg = 'currentrev';
3468                 # if message does not exist, show diff against the preloaded default
3469                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3470                         $oldtext = $this->mTitle->getDefaultMessageText();
3471                         if ( $oldtext !== false ) {
3472                                 $oldtitlemsg = 'defaultmessagetext';
3473                                 $oldContent = $this->toEditContent( $oldtext );
3474                         } else {
3475                                 $oldContent = null;
3476                         }
3477                 } else {
3478                         $oldContent = $this->getCurrentContent();
3479                 }
3480
3481                 $textboxContent = $this->toEditContent( $this->textbox1 );
3482                 if ( $this->editRevId !== null ) {
3483                         $newContent = $this->page->replaceSectionAtRev(
3484                                 $this->section, $textboxContent, $this->summary, $this->editRevId
3485                         );
3486                 } else {
3487                         $newContent = $this->page->replaceSectionContent(
3488                                 $this->section, $textboxContent, $this->summary, $this->edittime
3489                         );
3490                 }
3491
3492                 if ( $newContent ) {
3493                         Hooks::run( 'EditPageGetDiffContent', [ $this, &$newContent ] );
3494
3495                         $user = $this->context->getUser();
3496                         $popts = ParserOptions::newFromUserAndLang( $user, $wgContLang );
3497                         $newContent = $newContent->preSaveTransform( $this->mTitle, $user, $popts );
3498                 }
3499
3500                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3501                         $oldtitle = $this->context->msg( $oldtitlemsg )->parse();
3502                         $newtitle = $this->context->msg( 'yourtext' )->parse();
3503
3504                         if ( !$oldContent ) {
3505                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3506                         }
3507
3508                         if ( !$newContent ) {
3509                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3510                         }
3511
3512                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->context );
3513                         $de->setContent( $oldContent, $newContent );
3514
3515                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3516                         $de->showDiffStyle();
3517                 } else {
3518                         $difftext = '';
3519                 }
3520
3521                 $this->context->getOutput()->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3522         }
3523
3524         /**
3525          * Show the header copyright warning.
3526          */
3527         protected function showHeaderCopyrightWarning() {
3528                 $msg = 'editpage-head-copy-warn';
3529                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3530                         $this->context->getOutput()->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3531                                 'editpage-head-copy-warn' );
3532                 }
3533         }
3534
3535         /**
3536          * Give a chance for site and per-namespace customizations of
3537          * terms of service summary link that might exist separately
3538          * from the copyright notice.
3539          *
3540          * This will display between the save button and the edit tools,
3541          * so should remain short!
3542          */
3543         protected function showTosSummary() {
3544                 $msg = 'editpage-tos-summary';
3545                 Hooks::run( 'EditPageTosSummary', [ $this->mTitle, &$msg ] );
3546                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3547                         $out = $this->context->getOutput();
3548                         $out->addHTML( '<div class="mw-tos-summary">' );
3549                         $out->addWikiMsg( $msg );
3550                         $out->addHTML( '</div>' );
3551                 }
3552         }
3553
3554         /**
3555          * Inserts optional text shown below edit and upload forms. Can be used to offer special
3556          * characters not present on most keyboards for copying/pasting.
3557          */
3558         protected function showEditTools() {
3559                 $this->context->getOutput()->addHTML( '<div class="mw-editTools">' .
3560                         $this->context->msg( 'edittools' )->inContentLanguage()->parse() .
3561                         '</div>' );
3562         }
3563
3564         /**
3565          * Get the copyright warning
3566          *
3567          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3568          * @return string
3569          */
3570         protected function getCopywarn() {
3571                 return self::getCopyrightWarning( $this->mTitle );
3572         }
3573
3574         /**
3575          * Get the copyright warning, by default returns wikitext
3576          *
3577          * @param Title $title
3578          * @param string $format Output format, valid values are any function of a Message object
3579          * @param Language|string|null $langcode Language code or Language object.
3580          * @return string
3581          */
3582         public static function getCopyrightWarning( $title, $format = 'plain', $langcode = null ) {
3583                 global $wgRightsText;
3584                 if ( $wgRightsText ) {
3585                         $copywarnMsg = [ 'copyrightwarning',
3586                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3587                                 $wgRightsText ];
3588                 } else {
3589                         $copywarnMsg = [ 'copyrightwarning2',
3590                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' ];
3591                 }
3592                 // Allow for site and per-namespace customization of contribution/copyright notice.
3593                 Hooks::run( 'EditPageCopyrightWarning', [ $title, &$copywarnMsg ] );
3594
3595                 $msg = call_user_func_array( 'wfMessage', $copywarnMsg )->title( $title );
3596                 if ( $langcode ) {
3597                         $msg->inLanguage( $langcode );
3598                 }
3599                 return "<div id=\"editpage-copywarn\">\n" .
3600                         $msg->$format() . "\n</div>";
3601         }
3602
3603         /**
3604          * Get the Limit report for page previews
3605          *
3606          * @since 1.22
3607          * @param ParserOutput $output ParserOutput object from the parse
3608          * @return string HTML
3609          */
3610         public static function getPreviewLimitReport( $output ) {
3611                 global $wgLang;
3612
3613                 if ( !$output || !$output->getLimitReportData() ) {
3614                         return '';
3615                 }
3616
3617                 $limitReport = Html::rawElement( 'div', [ 'class' => 'mw-limitReportExplanation' ],
3618                         wfMessage( 'limitreport-title' )->parseAsBlock()
3619                 );
3620
3621                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3622                 $limitReport .= Html::openElement( 'div', [ 'class' => 'preview-limit-report-wrapper' ] );
3623
3624                 $limitReport .= Html::openElement( 'table', [
3625                         'class' => 'preview-limit-report wikitable'
3626                 ] ) .
3627                         Html::openElement( 'tbody' );
3628
3629                 foreach ( $output->getLimitReportData() as $key => $value ) {
3630                         if ( Hooks::run( 'ParserLimitReportFormat',
3631                                 [ $key, &$value, &$limitReport, true, true ]
3632                         ) ) {
3633                                 $keyMsg = wfMessage( $key );
3634                                 $valueMsg = wfMessage( [ "$key-value-html", "$key-value" ] );
3635                                 if ( !$valueMsg->exists() ) {
3636                                         $valueMsg = new RawMessage( '$1' );
3637                                 }
3638                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3639                                         $limitReport .= Html::openElement( 'tr' ) .
3640                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3641                                                 Html::rawElement( 'td', null,
3642                                                         $wgLang->formatNum( $valueMsg->params( $value )->parse() )
3643                                                 ) .
3644                                                 Html::closeElement( 'tr' );
3645                                 }
3646                         }
3647                 }
3648
3649                 $limitReport .= Html::closeElement( 'tbody' ) .
3650                         Html::closeElement( 'table' ) .
3651                         Html::closeElement( 'div' );
3652
3653                 return $limitReport;
3654         }
3655
3656         protected function showStandardInputs( &$tabindex = 2 ) {
3657                 $out = $this->context->getOutput();
3658                 $out->addHTML( "<div class='editOptions'>\n" );
3659
3660                 if ( $this->section != 'new' ) {
3661                         $this->showSummaryInput( false, $this->summary );
3662                         $out->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3663                 }
3664
3665                 $checkboxes = $this->getCheckboxesWidget(
3666                         $tabindex,
3667                         [ 'minor' => $this->minoredit, 'watch' => $this->watchthis ]
3668                 );
3669                 $checkboxesHTML = new OOUI\HorizontalLayout( [ 'items' => $checkboxes ] );
3670
3671                 $out->addHTML( "<div class='editCheckboxes'>" . $checkboxesHTML . "</div>\n" );
3672
3673                 // Show copyright warning.
3674                 $out->addWikiText( $this->getCopywarn() );
3675                 $out->addHTML( $this->editFormTextAfterWarn );
3676
3677                 $out->addHTML( "<div class='editButtons'>\n" );
3678                 $out->addHTML( implode( "\n", $this->getEditButtons( $tabindex ) ) . "\n" );
3679
3680                 $cancel = $this->getCancelLink();
3681
3682                 $message = $this->context->msg( 'edithelppage' )->inContentLanguage()->text();
3683                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3684                 $edithelp =
3685                         Html::linkButton(
3686                                 $this->context->msg( 'edithelp' )->text(),
3687                                 [ 'target' => 'helpwindow', 'href' => $edithelpurl ],
3688                                 [ 'mw-ui-quiet' ]
3689                         ) .
3690                         $this->context->msg( 'word-separator' )->escaped() .
3691                         $this->context->msg( 'newwindow' )->parse();
3692
3693                 $out->addHTML( "        <span class='cancelLink'>{$cancel}</span>\n" );
3694                 $out->addHTML( "        <span class='editHelp'>{$edithelp}</span>\n" );
3695                 $out->addHTML( "</div><!-- editButtons -->\n" );
3696
3697                 Hooks::run( 'EditPage::showStandardInputs:options', [ $this, $out, &$tabindex ] );
3698
3699                 $out->addHTML( "</div><!-- editOptions -->\n" );
3700         }
3701
3702         /**
3703          * Show an edit conflict. textbox1 is already shown in showEditForm().
3704          * If you want to use another entry point to this function, be careful.
3705          */
3706         protected function showConflict() {
3707                 $out = $this->context->getOutput();
3708                 // Avoid PHP 7.1 warning of passing $this by reference
3709                 $editPage = $this;
3710                 if ( Hooks::run( 'EditPageBeforeConflictDiff', [ &$editPage, &$out ] ) ) {
3711                         $this->incrementConflictStats();
3712
3713                         $this->getEditConflictHelper()->showEditFormTextAfterFooters();
3714                 }
3715         }
3716
3717         protected function incrementConflictStats() {
3718                 $this->getEditConflictHelper()->incrementConflictStats();
3719         }
3720
3721         /**
3722          * @return string
3723          */
3724         public function getCancelLink() {
3725                 $cancelParams = [];
3726                 if ( !$this->isConflict && $this->oldid > 0 ) {
3727                         $cancelParams['oldid'] = $this->oldid;
3728                 } elseif ( $this->getContextTitle()->isRedirect() ) {
3729                         $cancelParams['redirect'] = 'no';
3730                 }
3731
3732                 return new OOUI\ButtonWidget( [
3733                         'id' => 'mw-editform-cancel',
3734                         'href' => $this->getContextTitle()->getLinkURL( $cancelParams ),
3735                         'label' => new OOUI\HtmlSnippet( $this->context->msg( 'cancel' )->parse() ),
3736                         'framed' => false,
3737                         'infusable' => true,
3738                         'flags' => 'destructive',
3739                 ] );
3740         }
3741
3742         /**
3743          * Returns the URL to use in the form's action attribute.
3744          * This is used by EditPage subclasses when simply customizing the action
3745          * variable in the constructor is not enough. This can be used when the
3746          * EditPage lives inside of a Special page rather than a custom page action.
3747          *
3748          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3749          * @return string
3750          */
3751         protected function getActionURL( Title $title ) {
3752                 return $title->getLocalURL( [ 'action' => $this->action ] );
3753         }
3754
3755         /**
3756          * Check if a page was deleted while the user was editing it, before submit.
3757          * Note that we rely on the logging table, which hasn't been always there,
3758          * but that doesn't matter, because this only applies to brand new
3759          * deletes.
3760          * @return bool
3761          */
3762         protected function wasDeletedSinceLastEdit() {
3763                 if ( $this->deletedSinceEdit !== null ) {
3764                         return $this->deletedSinceEdit;
3765                 }
3766
3767                 $this->deletedSinceEdit = false;
3768
3769                 if ( !$this->mTitle->exists() && $this->mTitle->isDeletedQuick() ) {
3770                         $this->lastDelete = $this->getLastDelete();
3771                         if ( $this->lastDelete ) {
3772                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3773                                 if ( $deleteTime > $this->starttime ) {
3774                                         $this->deletedSinceEdit = true;
3775                                 }
3776                         }
3777                 }
3778
3779                 return $this->deletedSinceEdit;
3780         }
3781
3782         /**
3783          * @return bool|stdClass
3784          */
3785         protected function getLastDelete() {
3786                 $dbr = wfGetDB( DB_REPLICA );
3787                 $commentQuery = CommentStore::getStore()->getJoin( 'log_comment' );
3788                 $data = $dbr->selectRow(
3789                         [ 'logging', 'user' ] + $commentQuery['tables'],
3790                         [
3791                                 'log_type',
3792                                 'log_action',
3793                                 'log_timestamp',
3794                                 'log_user',
3795                                 'log_namespace',
3796                                 'log_title',
3797                                 'log_params',
3798                                 'log_deleted',
3799                                 'user_name'
3800                         ] + $commentQuery['fields'], [
3801                                 'log_namespace' => $this->mTitle->getNamespace(),
3802                                 'log_title' => $this->mTitle->getDBkey(),
3803                                 'log_type' => 'delete',
3804                                 'log_action' => 'delete',
3805                                 'user_id=log_user'
3806                         ],
3807                         __METHOD__,
3808                         [ 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ],
3809                         [
3810                                 'user' => [ 'JOIN', 'user_id=log_user' ],
3811                         ] + $commentQuery['joins']
3812                 );
3813                 // Quick paranoid permission checks...
3814                 if ( is_object( $data ) ) {
3815                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3816                                 $data->user_name = $this->context->msg( 'rev-deleted-user' )->escaped();
3817                         }
3818
3819                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3820                                 $data->log_comment_text = $this->context->msg( 'rev-deleted-comment' )->escaped();
3821                                 $data->log_comment_data = null;
3822                         }
3823                 }
3824
3825                 return $data;
3826         }
3827
3828         /**
3829          * Get the rendered text for previewing.
3830          * @throws MWException
3831          * @return string
3832          */
3833         public function getPreviewText() {
3834                 $out = $this->context->getOutput();
3835                 $config = $this->context->getConfig();
3836
3837                 if ( $config->get( 'RawHtml' ) && !$this->mTokenOk ) {
3838                         // Could be an offsite preview attempt. This is very unsafe if
3839                         // HTML is enabled, as it could be an attack.
3840                         $parsedNote = '';
3841                         if ( $this->textbox1 !== '' ) {
3842                                 // Do not put big scary notice, if previewing the empty
3843                                 // string, which happens when you initially edit
3844                                 // a category page, due to automatic preview-on-open.
3845                                 $parsedNote = $out->parse( "<div class='previewnote'>" .
3846                                         $this->context->msg( 'session_fail_preview_html' )->text() . "</div>",
3847                                         true, /* interface */true );
3848                         }
3849                         $this->incrementEditFailureStats( 'session_loss' );
3850                         return $parsedNote;
3851                 }
3852
3853                 $note = '';
3854
3855                 try {
3856                         $content = $this->toEditContent( $this->textbox1 );
3857
3858                         $previewHTML = '';
3859                         if ( !Hooks::run(
3860                                 'AlternateEditPreview',
3861                                 [ $this, &$content, &$previewHTML, &$this->mParserOutput ] )
3862                         ) {
3863                                 return $previewHTML;
3864                         }
3865
3866                         # provide a anchor link to the editform
3867                         $continueEditing = '<span class="mw-continue-editing">' .
3868                                 '[[#' . self::EDITFORM_ID . '|' .
3869                                 $this->context->getLanguage()->getArrow() . ' ' .
3870                                 $this->context->msg( 'continue-editing' )->text() . ']]</span>';
3871                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3872                                 if ( $this->mTokenOkExceptSuffix ) {
3873                                         $note = $this->context->msg( 'token_suffix_mismatch' )->plain();
3874                                         $this->incrementEditFailureStats( 'bad_token' );
3875                                 } else {
3876                                         $note = $this->context->msg( 'session_fail_preview' )->plain();
3877                                         $this->incrementEditFailureStats( 'session_loss' );
3878                                 }
3879                         } elseif ( $this->incompleteForm ) {
3880                                 $note = $this->context->msg( 'edit_form_incomplete' )->plain();
3881                                 if ( $this->mTriedSave ) {
3882                                         $this->incrementEditFailureStats( 'incomplete_form' );
3883                                 }
3884                         } else {
3885                                 $note = $this->context->msg( 'previewnote' )->plain() . ' ' . $continueEditing;
3886                         }
3887
3888                         # don't parse non-wikitext pages, show message about preview
3889                         if ( $this->mTitle->isUserConfigPage() || $this->mTitle->isSiteConfigPage() ) {
3890                                 if ( $this->mTitle->isUserConfigPage() ) {
3891                                         $level = 'user';
3892                                 } elseif ( $this->mTitle->isSiteConfigPage() ) {
3893                                         $level = 'site';
3894                                 } else {
3895                                         $level = false;
3896                                 }
3897
3898                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3899                                         $format = 'css';
3900                                         if ( $level === 'user' && !$config->get( 'AllowUserCss' ) ) {
3901                                                 $format = false;
3902                                         }
3903                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3904                                         $format = 'js';
3905                                         if ( $level === 'user' && !$config->get( 'AllowUserJs' ) ) {
3906                                                 $format = false;
3907                                         }
3908                                 } else {
3909                                         $format = false;
3910                                 }
3911
3912                                 # Used messages to make sure grep find them:
3913                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3914                                 if ( $level && $format ) {
3915                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3916                                                 $this->context->msg( "{$level}{$format}preview" )->text() .
3917                                                 ' ' . $continueEditing . "</div>";
3918                                 }
3919                         }
3920
3921                         # If we're adding a comment, we need to show the
3922                         # summary as the headline
3923                         if ( $this->section === "new" && $this->summary !== "" ) {
3924                                 $content = $content->addSectionHeader( $this->summary );
3925                         }
3926
3927                         $hook_args = [ $this, &$content ];
3928                         Hooks::run( 'EditPageGetPreviewContent', $hook_args );
3929
3930                         $parserResult = $this->doPreviewParse( $content );
3931                         $parserOutput = $parserResult['parserOutput'];
3932                         $previewHTML = $parserResult['html'];
3933                         $this->mParserOutput = $parserOutput;
3934                         $out->addParserOutputMetadata( $parserOutput );
3935
3936                         if ( count( $parserOutput->getWarnings() ) ) {
3937                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3938                         }
3939
3940                 } catch ( MWContentSerializationException $ex ) {
3941                         $m = $this->context->msg(
3942                                 'content-failed-to-parse',
3943                                 $this->contentModel,
3944                                 $this->contentFormat,
3945                                 $ex->getMessage()
3946                         );
3947                         $note .= "\n\n" . $m->parse();
3948                         $previewHTML = '';
3949                 }
3950
3951                 if ( $this->isConflict ) {
3952                         $conflict = '<h2 id="mw-previewconflict">'
3953                                 . $this->context->msg( 'previewconflict' )->escaped() . "</h2>\n";
3954                 } else {
3955                         $conflict = '<hr />';
3956                 }
3957
3958                 $previewhead = "<div class='previewnote'>\n" .
3959                         '<h2 id="mw-previewheader">' . $this->context->msg( 'preview' )->escaped() . "</h2>" .
3960                         $out->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3961
3962                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3963                 $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3964                         'class' => 'mw-content-' . $pageViewLang->getDir() ];
3965                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3966
3967                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3968         }
3969
3970         private function incrementEditFailureStats( $failureType ) {
3971                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
3972                 $stats->increment( 'edit.failures.' . $failureType );
3973         }
3974
3975         /**
3976          * Get parser options for a preview
3977          * @return ParserOptions
3978          */
3979         protected function getPreviewParserOptions() {
3980                 $parserOptions = $this->page->makeParserOptions( $this->context );
3981                 $parserOptions->setIsPreview( true );
3982                 $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3983                 $parserOptions->enableLimitReport();
3984                 return $parserOptions;
3985         }
3986
3987         /**
3988          * Parse the page for a preview. Subclasses may override this class, in order
3989          * to parse with different options, or to otherwise modify the preview HTML.
3990          *
3991          * @param Content $content The page content
3992          * @return array with keys:
3993          *   - parserOutput: The ParserOutput object
3994          *   - html: The HTML to be displayed
3995          */
3996         protected function doPreviewParse( Content $content ) {
3997                 $user = $this->context->getUser();
3998                 $parserOptions = $this->getPreviewParserOptions();
3999                 $pstContent = $content->preSaveTransform( $this->mTitle, $user, $parserOptions );
4000                 $scopedCallback = $parserOptions->setupFakeRevision(
4001                         $this->mTitle, $pstContent, $user );
4002                 $parserOutput = $pstContent->getParserOutput( $this->mTitle, null, $parserOptions );
4003                 ScopedCallback::consume( $scopedCallback );
4004                 return [
4005                         'parserOutput' => $parserOutput,
4006                         'html' => $parserOutput->getText( [
4007                                 'enableSectionEditLinks' => false
4008                         ] )
4009                 ];
4010         }
4011
4012         /**
4013          * @return array
4014          */
4015         public function getTemplates() {
4016                 if ( $this->preview || $this->section != '' ) {
4017                         $templates = [];
4018                         if ( !isset( $this->mParserOutput ) ) {
4019                                 return $templates;
4020                         }
4021                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
4022                                 foreach ( array_keys( $template ) as $dbk ) {
4023                                         $templates[] = Title::makeTitle( $ns, $dbk );
4024                                 }
4025                         }
4026                         return $templates;
4027                 } else {
4028                         return $this->mTitle->getTemplateLinksFrom();
4029                 }
4030         }
4031
4032         /**
4033          * Shows a bulletin board style toolbar for common editing functions.
4034          * It can be disabled in the user preferences.
4035          *
4036          * @param Title $title Title object for the page being edited (optional)
4037          * @return string
4038          */
4039         public static function getEditToolbar( $title = null ) {
4040                 global $wgContLang, $wgOut;
4041                 global $wgEnableUploads, $wgForeignFileRepos;
4042
4043                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
4044                 $showSignature = true;
4045                 if ( $title ) {
4046                         $showSignature = MWNamespace::wantSignatures( $title->getNamespace() );
4047                 }
4048
4049                 /**
4050                  * $toolarray is an array of arrays each of which includes the
4051                  * opening tag, the closing tag, optionally a sample text that is
4052                  * inserted between the two when no selection is highlighted
4053                  * and.  The tip text is shown when the user moves the mouse
4054                  * over the button.
4055                  *
4056                  * Images are defined in ResourceLoaderEditToolbarModule.
4057                  */
4058                 $toolarray = [
4059                         [
4060                                 'id'     => 'mw-editbutton-bold',
4061                                 'open'   => '\'\'\'',
4062                                 'close'  => '\'\'\'',
4063                                 'sample' => wfMessage( 'bold_sample' )->text(),
4064                                 'tip'    => wfMessage( 'bold_tip' )->text(),
4065                         ],
4066                         [
4067                                 'id'     => 'mw-editbutton-italic',
4068                                 'open'   => '\'\'',
4069                                 'close'  => '\'\'',
4070                                 'sample' => wfMessage( 'italic_sample' )->text(),
4071                                 'tip'    => wfMessage( 'italic_tip' )->text(),
4072                         ],
4073                         [
4074                                 'id'     => 'mw-editbutton-link',
4075                                 'open'   => '[[',
4076                                 'close'  => ']]',
4077                                 'sample' => wfMessage( 'link_sample' )->text(),
4078                                 'tip'    => wfMessage( 'link_tip' )->text(),
4079                         ],
4080                         [
4081                                 'id'     => 'mw-editbutton-extlink',
4082                                 'open'   => '[',
4083                                 'close'  => ']',
4084                                 'sample' => wfMessage( 'extlink_sample' )->text(),
4085                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
4086                         ],
4087                         [
4088                                 'id'     => 'mw-editbutton-headline',
4089                                 'open'   => "\n== ",
4090                                 'close'  => " ==\n",
4091                                 'sample' => wfMessage( 'headline_sample' )->text(),
4092                                 'tip'    => wfMessage( 'headline_tip' )->text(),
4093                         ],
4094                         $imagesAvailable ? [
4095                                 'id'     => 'mw-editbutton-image',
4096                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
4097                                 'close'  => ']]',
4098                                 'sample' => wfMessage( 'image_sample' )->text(),
4099                                 'tip'    => wfMessage( 'image_tip' )->text(),
4100                         ] : false,
4101                         $imagesAvailable ? [
4102                                 'id'     => 'mw-editbutton-media',
4103                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
4104                                 'close'  => ']]',
4105                                 'sample' => wfMessage( 'media_sample' )->text(),
4106                                 'tip'    => wfMessage( 'media_tip' )->text(),
4107                         ] : false,
4108                         [
4109                                 'id'     => 'mw-editbutton-nowiki',
4110                                 'open'   => "<nowiki>",
4111                                 'close'  => "</nowiki>",
4112                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
4113                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
4114                         ],
4115                         $showSignature ? [
4116                                 'id'     => 'mw-editbutton-signature',
4117                                 'open'   => wfMessage( 'sig-text', '~~~~' )->inContentLanguage()->text(),
4118                                 'close'  => '',
4119                                 'sample' => '',
4120                                 'tip'    => wfMessage( 'sig_tip' )->text(),
4121                         ] : false,
4122                         [
4123                                 'id'     => 'mw-editbutton-hr',
4124                                 'open'   => "\n----\n",
4125                                 'close'  => '',
4126                                 'sample' => '',
4127                                 'tip'    => wfMessage( 'hr_tip' )->text(),
4128                         ]
4129                 ];
4130
4131                 $script = 'mw.loader.using("mediawiki.toolbar", function () {';
4132                 foreach ( $toolarray as $tool ) {
4133                         if ( !$tool ) {
4134                                 continue;
4135                         }
4136
4137                         $params = [
4138                                 // Images are defined in ResourceLoaderEditToolbarModule
4139                                 false,
4140                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
4141                                 // Older browsers show a "speedtip" type message only for ALT.
4142                                 // Ideally these should be different, realistically they
4143                                 // probably don't need to be.
4144                                 $tool['tip'],
4145                                 $tool['open'],
4146                                 $tool['close'],
4147                                 $tool['sample'],
4148                                 $tool['id'],
4149                         ];
4150
4151                         $script .= Xml::encodeJsCall(
4152                                 'mw.toolbar.addButton',
4153                                 $params,
4154                                 ResourceLoader::inDebugMode()
4155                         );
4156                 }
4157
4158                 $script .= '});';
4159
4160                 $toolbar = '<div id="toolbar"></div>';
4161
4162                 if ( Hooks::run( 'EditPageBeforeEditToolbar', [ &$toolbar ] ) ) {
4163                         // Only add the old toolbar cruft to the page payload if the toolbar has not
4164                         // been over-written by a hook caller
4165                         $wgOut->addScript( ResourceLoader::makeInlineScript( $script ) );
4166                 };
4167
4168                 return $toolbar;
4169         }
4170
4171         /**
4172          * Return an array of checkbox definitions.
4173          *
4174          * Array keys correspond to the `<input>` 'name' attribute to use for each checkbox.
4175          *
4176          * Array values are associative arrays with the following keys:
4177          *  - 'label-message' (required): message for label text
4178          *  - 'id' (required): 'id' attribute for the `<input>`
4179          *  - 'default' (required): default checkedness (true or false)
4180          *  - 'title-message' (optional): used to generate 'title' attribute for the `<label>`
4181          *  - 'tooltip' (optional): used to generate 'title' and 'accesskey' attributes
4182          *    from messages like 'tooltip-foo', 'accesskey-foo'
4183          *  - 'label-id' (optional): 'id' attribute for the `<label>`
4184          *  - 'legacy-name' (optional): short name for backwards-compatibility
4185          * @param array $checked Array of checkbox name (matching the 'legacy-name') => bool,
4186          *   where bool indicates the checked status of the checkbox
4187          * @return array
4188          */
4189         public function getCheckboxesDefinition( $checked ) {
4190                 $checkboxes = [];
4191
4192                 $user = $this->context->getUser();
4193                 // don't show the minor edit checkbox if it's a new page or section
4194                 if ( !$this->isNew && $user->isAllowed( 'minoredit' ) ) {
4195                         $checkboxes['wpMinoredit'] = [
4196                                 'id' => 'wpMinoredit',
4197                                 'label-message' => 'minoredit',
4198                                 // Uses messages: tooltip-minoredit, accesskey-minoredit
4199                                 'tooltip' => 'minoredit',
4200                                 'label-id' => 'mw-editpage-minoredit',
4201                                 'legacy-name' => 'minor',
4202                                 'default' => $checked['minor'],
4203                         ];
4204                 }
4205
4206                 if ( $user->isLoggedIn() ) {
4207                         $checkboxes['wpWatchthis'] = [
4208                                 'id' => 'wpWatchthis',
4209                                 'label-message' => 'watchthis',
4210                                 // Uses messages: tooltip-watch, accesskey-watch
4211                                 'tooltip' => 'watch',
4212                                 'label-id' => 'mw-editpage-watch',
4213                                 'legacy-name' => 'watch',
4214                                 'default' => $checked['watch'],
4215                         ];
4216                 }
4217
4218                 $editPage = $this;
4219                 Hooks::run( 'EditPageGetCheckboxesDefinition', [ $editPage, &$checkboxes ] );
4220
4221                 return $checkboxes;
4222         }
4223
4224         /**
4225          * Returns an array of html code of the following checkboxes old style:
4226          * minor and watch
4227          *
4228          * @deprecated since 1.30 Use getCheckboxesWidget() or getCheckboxesDefinition() instead
4229          * @param int &$tabindex Current tabindex
4230          * @param array $checked See getCheckboxesDefinition()
4231          * @return array
4232          */
4233         public function getCheckboxes( &$tabindex, $checked ) {
4234                 wfDeprecated( __METHOD__, '1.30' );
4235                 $checkboxes = [];
4236                 $checkboxesDef = $this->getCheckboxesDefinition( $checked );
4237
4238                 // Backwards-compatibility for the EditPageBeforeEditChecks hook
4239                 if ( !$this->isNew ) {
4240                         $checkboxes['minor'] = '';
4241                 }
4242                 $checkboxes['watch'] = '';
4243
4244                 foreach ( $checkboxesDef as $name => $options ) {
4245                         $legacyName = isset( $options['legacy-name'] ) ? $options['legacy-name'] : $name;
4246                         $label = $this->context->msg( $options['label-message'] )->parse();
4247                         $attribs = [
4248                                 'tabindex' => ++$tabindex,
4249                                 'id' => $options['id'],
4250                         ];
4251                         $labelAttribs = [
4252                                 'for' => $options['id'],
4253                         ];
4254                         if ( isset( $options['tooltip'] ) ) {
4255                                 $attribs['accesskey'] = $this->context->msg( "accesskey-{$options['tooltip']}" )->text();
4256                                 $labelAttribs['title'] = Linker::titleAttrib( $options['tooltip'], 'withaccess' );
4257                         }
4258                         if ( isset( $options['title-message'] ) ) {
4259                                 $labelAttribs['title'] = $this->context->msg( $options['title-message'] )->text();
4260                         }
4261                         if ( isset( $options['label-id'] ) ) {
4262                                 $labelAttribs['id'] = $options['label-id'];
4263                         }
4264                         $checkboxHtml =
4265                                 Xml::check( $name, $options['default'], $attribs ) .
4266                                 '&#160;' .
4267                                 Xml::tags( 'label', $labelAttribs, $label );
4268
4269                         $checkboxes[ $legacyName ] = $checkboxHtml;
4270                 }
4271
4272                 // Avoid PHP 7.1 warning of passing $this by reference
4273                 $editPage = $this;
4274                 Hooks::run( 'EditPageBeforeEditChecks', [ &$editPage, &$checkboxes, &$tabindex ], '1.29' );
4275                 return $checkboxes;
4276         }
4277
4278         /**
4279          * Returns an array of checkboxes for the edit form, including 'minor' and 'watch' checkboxes and
4280          * any other added by extensions.
4281          *
4282          * @deprecated since 1.30 Use getCheckboxesWidget() or getCheckboxesDefinition() instead
4283          * @param int &$tabindex Current tabindex
4284          * @param array $checked Array of checkbox => bool, where bool indicates the checked
4285          *                 status of the checkbox
4286          *
4287          * @return array Associative array of string keys to OOUI\FieldLayout instances
4288          */
4289         public function getCheckboxesOOUI( &$tabindex, $checked ) {
4290                 wfDeprecated( __METHOD__, '1.30' );
4291                 return $this->getCheckboxesWidget( $tabindex, $checked );
4292         }
4293
4294         /**
4295          * Returns an array of checkboxes for the edit form, including 'minor' and 'watch' checkboxes and
4296          * any other added by extensions.
4297          *
4298          * @param int &$tabindex Current tabindex
4299          * @param array $checked Array of checkbox => bool, where bool indicates the checked
4300          *                 status of the checkbox
4301          *
4302          * @return array Associative array of string keys to OOUI\FieldLayout instances
4303          */
4304         public function getCheckboxesWidget( &$tabindex, $checked ) {
4305                 $checkboxes = [];
4306                 $checkboxesDef = $this->getCheckboxesDefinition( $checked );
4307
4308                 foreach ( $checkboxesDef as $name => $options ) {
4309                         $legacyName = isset( $options['legacy-name'] ) ? $options['legacy-name'] : $name;
4310
4311                         $title = null;
4312                         $accesskey = null;
4313                         if ( isset( $options['tooltip'] ) ) {
4314                                 $accesskey = $this->context->msg( "accesskey-{$options['tooltip']}" )->text();
4315                                 $title = Linker::titleAttrib( $options['tooltip'] );
4316                         }
4317                         if ( isset( $options['title-message'] ) ) {
4318                                 $title = $this->context->msg( $options['title-message'] )->text();
4319                         }
4320
4321                         $checkboxes[ $legacyName ] = new OOUI\FieldLayout(
4322                                 new OOUI\CheckboxInputWidget( [
4323                                         'tabIndex' => ++$tabindex,
4324                                         'accessKey' => $accesskey,
4325                                         'id' => $options['id'] . 'Widget',
4326                                         'inputId' => $options['id'],
4327                                         'name' => $name,
4328                                         'selected' => $options['default'],
4329                                         'infusable' => true,
4330                                 ] ),
4331                                 [
4332                                         'align' => 'inline',
4333                                         'label' => new OOUI\HtmlSnippet( $this->context->msg( $options['label-message'] )->parse() ),
4334                                         'title' => $title,
4335                                         'id' => isset( $options['label-id'] ) ? $options['label-id'] : null,
4336                                 ]
4337                         );
4338                 }
4339
4340                 // Backwards-compatibility hack to run the EditPageBeforeEditChecks hook. It's important,
4341                 // people have used it for the weirdest things completely unrelated to checkboxes...
4342                 // And if we're gonna run it, might as well allow its legacy checkboxes to be shown.
4343                 $legacyCheckboxes = [];
4344                 if ( !$this->isNew ) {
4345                         $legacyCheckboxes['minor'] = '';
4346                 }
4347                 $legacyCheckboxes['watch'] = '';
4348                 // Copy new-style checkboxes into an old-style structure
4349                 foreach ( $checkboxes as $name => $oouiLayout ) {
4350                         $legacyCheckboxes[$name] = (string)$oouiLayout;
4351                 }
4352                 // Avoid PHP 7.1 warning of passing $this by reference
4353                 $ep = $this;
4354                 Hooks::run( 'EditPageBeforeEditChecks', [ &$ep, &$legacyCheckboxes, &$tabindex ], '1.29' );
4355                 // Copy back any additional old-style checkboxes into the new-style structure
4356                 foreach ( $legacyCheckboxes as $name => $html ) {
4357                         if ( $html && !isset( $checkboxes[$name] ) ) {
4358                                 $checkboxes[$name] = new OOUI\Widget( [ 'content' => new OOUI\HtmlSnippet( $html ) ] );
4359                         }
4360                 }
4361
4362                 return $checkboxes;
4363         }
4364
4365         /**
4366          * Get the message key of the label for the button to save the page
4367          *
4368          * @since 1.30
4369          * @return string
4370          */
4371         protected function getSubmitButtonLabel() {
4372                 $labelAsPublish =
4373                         $this->context->getConfig()->get( 'EditSubmitButtonLabelPublish' );
4374
4375                 // Can't use $this->isNew as that's also true if we're adding a new section to an extant page
4376                 $newPage = !$this->mTitle->exists();
4377
4378                 if ( $labelAsPublish ) {
4379                         $buttonLabelKey = $newPage ? 'publishpage' : 'publishchanges';
4380                 } else {
4381                         $buttonLabelKey = $newPage ? 'savearticle' : 'savechanges';
4382                 }
4383
4384                 return $buttonLabelKey;
4385         }
4386
4387         /**
4388          * Returns an array of html code of the following buttons:
4389          * save, diff and preview
4390          *
4391          * @param int &$tabindex Current tabindex
4392          *
4393          * @return array
4394          */
4395         public function getEditButtons( &$tabindex ) {
4396                 $buttons = [];
4397
4398                 $labelAsPublish =
4399                         $this->context->getConfig()->get( 'EditSubmitButtonLabelPublish' );
4400
4401                 $buttonLabel = $this->context->msg( $this->getSubmitButtonLabel() )->text();
4402                 $buttonTooltip = $labelAsPublish ? 'publish' : 'save';
4403
4404                 $buttons['save'] = new OOUI\ButtonInputWidget( [
4405                         'name' => 'wpSave',
4406                         'tabIndex' => ++$tabindex,
4407                         'id' => 'wpSaveWidget',
4408                         'inputId' => 'wpSave',
4409                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4410                         'useInputTag' => true,
4411                         'flags' => [ 'progressive', 'primary' ],
4412                         'label' => $buttonLabel,
4413                         'infusable' => true,
4414                         'type' => 'submit',
4415                         // Messages used: tooltip-save, tooltip-publish
4416                         'title' => Linker::titleAttrib( $buttonTooltip ),
4417                         // Messages used: accesskey-save, accesskey-publish
4418                         'accessKey' => Linker::accesskey( $buttonTooltip ),
4419                 ] );
4420
4421                 $buttons['preview'] = new OOUI\ButtonInputWidget( [
4422                         'name' => 'wpPreview',
4423                         'tabIndex' => ++$tabindex,
4424                         'id' => 'wpPreviewWidget',
4425                         'inputId' => 'wpPreview',
4426                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4427                         'useInputTag' => true,
4428                         'label' => $this->context->msg( 'showpreview' )->text(),
4429                         'infusable' => true,
4430                         'type' => 'submit',
4431                         // Message used: tooltip-preview
4432                         'title' => Linker::titleAttrib( 'preview' ),
4433                         // Message used: accesskey-preview
4434                         'accessKey' => Linker::accesskey( 'preview' ),
4435                 ] );
4436
4437                 $buttons['diff'] = new OOUI\ButtonInputWidget( [
4438                         'name' => 'wpDiff',
4439                         'tabIndex' => ++$tabindex,
4440                         'id' => 'wpDiffWidget',
4441                         'inputId' => 'wpDiff',
4442                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4443                         'useInputTag' => true,
4444                         'label' => $this->context->msg( 'showdiff' )->text(),
4445                         'infusable' => true,
4446                         'type' => 'submit',
4447                         // Message used: tooltip-diff
4448                         'title' => Linker::titleAttrib( 'diff' ),
4449                         // Message used: accesskey-diff
4450                         'accessKey' => Linker::accesskey( 'diff' ),
4451                 ] );
4452
4453                 // Avoid PHP 7.1 warning of passing $this by reference
4454                 $editPage = $this;
4455                 Hooks::run( 'EditPageBeforeEditButtons', [ &$editPage, &$buttons, &$tabindex ] );
4456
4457                 return $buttons;
4458         }
4459
4460         /**
4461          * Creates a basic error page which informs the user that
4462          * they have attempted to edit a nonexistent section.
4463          */
4464         public function noSuchSectionPage() {
4465                 $out = $this->context->getOutput();
4466                 $out->prepareErrorPage( $this->context->msg( 'nosuchsectiontitle' ) );
4467
4468                 $res = $this->context->msg( 'nosuchsectiontext', $this->section )->parseAsBlock();
4469
4470                 // Avoid PHP 7.1 warning of passing $this by reference
4471                 $editPage = $this;
4472                 Hooks::run( 'EditPageNoSuchSection', [ &$editPage, &$res ] );
4473                 $out->addHTML( $res );
4474
4475                 $out->returnToMain( false, $this->mTitle );
4476         }
4477
4478         /**
4479          * Show "your edit contains spam" page with your diff and text
4480          *
4481          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
4482          */
4483         public function spamPageWithContent( $match = false ) {
4484                 $this->textbox2 = $this->textbox1;
4485
4486                 if ( is_array( $match ) ) {
4487                         $match = $this->context->getLanguage()->listToText( $match );
4488                 }
4489                 $out = $this->context->getOutput();
4490                 $out->prepareErrorPage( $this->context->msg( 'spamprotectiontitle' ) );
4491
4492                 $out->addHTML( '<div id="spamprotected">' );
4493                 $out->addWikiMsg( 'spamprotectiontext' );
4494                 if ( $match ) {
4495                         $out->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
4496                 }
4497                 $out->addHTML( '</div>' );
4498
4499                 $out->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
4500                 $this->showDiff();
4501
4502                 $out->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
4503                 $this->showTextbox2();
4504
4505                 $out->addReturnTo( $this->getContextTitle(), [ 'action' => 'edit' ] );
4506         }
4507
4508         /**
4509          * Filter an input field through a Unicode de-armoring process if it
4510          * came from an old browser with known broken Unicode editing issues.
4511          *
4512          * @deprecated since 1.30, does nothing
4513          *
4514          * @param WebRequest $request
4515          * @param string $field
4516          * @return string
4517          */
4518         protected function safeUnicodeInput( $request, $field ) {
4519                 return rtrim( $request->getText( $field ) );
4520         }
4521
4522         /**
4523          * Filter an output field through a Unicode armoring process if it is
4524          * going to an old browser with known broken Unicode editing issues.
4525          *
4526          * @deprecated since 1.30, does nothing
4527          *
4528          * @param string $text
4529          * @return string
4530          */
4531         protected function safeUnicodeOutput( $text ) {
4532                 return $text;
4533         }
4534
4535         /**
4536          * @since 1.29
4537          */
4538         protected function addEditNotices() {
4539                 $out = $this->context->getOutput();
4540                 $editNotices = $this->mTitle->getEditNotices( $this->oldid );
4541                 if ( count( $editNotices ) ) {
4542                         $out->addHTML( implode( "\n", $editNotices ) );
4543                 } else {
4544                         $msg = $this->context->msg( 'editnotice-notext' );
4545                         if ( !$msg->isDisabled() ) {
4546                                 $out->addHTML(
4547                                         '<div class="mw-editnotice-notext">'
4548                                         . $msg->parseAsBlock()
4549                                         . '</div>'
4550                                 );
4551                         }
4552                 }
4553         }
4554
4555         /**
4556          * @since 1.29
4557          */
4558         protected function addTalkPageText() {
4559                 if ( $this->mTitle->isTalkPage() ) {
4560                         $this->context->getOutput()->addWikiMsg( 'talkpagetext' );
4561                 }
4562         }
4563
4564         /**
4565          * @since 1.29
4566          */
4567         protected function addLongPageWarningHeader() {
4568                 if ( $this->contentLength === false ) {
4569                         $this->contentLength = strlen( $this->textbox1 );
4570                 }
4571
4572                 $out = $this->context->getOutput();
4573                 $lang = $this->context->getLanguage();
4574                 $maxArticleSize = $this->context->getConfig()->get( 'MaxArticleSize' );
4575                 if ( $this->tooBig || $this->contentLength > $maxArticleSize * 1024 ) {
4576                         $out->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
4577                                 [
4578                                         'longpageerror',
4579                                         $lang->formatNum( round( $this->contentLength / 1024, 3 ) ),
4580                                         $lang->formatNum( $maxArticleSize )
4581                                 ]
4582                         );
4583                 } else {
4584                         if ( !$this->context->msg( 'longpage-hint' )->isDisabled() ) {
4585                                 $out->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
4586                                         [
4587                                                 'longpage-hint',
4588                                                 $lang->formatSize( strlen( $this->textbox1 ) ),
4589                                                 strlen( $this->textbox1 )
4590                                         ]
4591                                 );
4592                         }
4593                 }
4594         }
4595
4596         /**
4597          * @since 1.29
4598          */
4599         protected function addPageProtectionWarningHeaders() {
4600                 $out = $this->context->getOutput();
4601                 if ( $this->mTitle->isProtected( 'edit' ) &&
4602                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
4603                 ) {
4604                         # Is the title semi-protected?
4605                         if ( $this->mTitle->isSemiProtected() ) {
4606                                 $noticeMsg = 'semiprotectedpagewarning';
4607                         } else {
4608                                 # Then it must be protected based on static groups (regular)
4609                                 $noticeMsg = 'protectedpagewarning';
4610                         }
4611                         LogEventsList::showLogExtract( $out, 'protect', $this->mTitle, '',
4612                                 [ 'lim' => 1, 'msgKey' => [ $noticeMsg ] ] );
4613                 }
4614                 if ( $this->mTitle->isCascadeProtected() ) {
4615                         # Is this page under cascading protection from some source pages?
4616                         /** @var Title[] $cascadeSources */
4617                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
4618                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
4619                         $cascadeSourcesCount = count( $cascadeSources );
4620                         if ( $cascadeSourcesCount > 0 ) {
4621                                 # Explain, and list the titles responsible
4622                                 foreach ( $cascadeSources as $page ) {
4623                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
4624                                 }
4625                         }
4626                         $notice .= '</div>';
4627                         $out->wrapWikiMsg( $notice, [ 'cascadeprotectedwarning', $cascadeSourcesCount ] );
4628                 }
4629                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
4630                         LogEventsList::showLogExtract( $out, 'protect', $this->mTitle, '',
4631                                 [ 'lim' => 1,
4632                                         'showIfEmpty' => false,
4633                                         'msgKey' => [ 'titleprotectedwarning' ],
4634                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ] );
4635                 }
4636         }
4637
4638         /**
4639          * @param OutputPage $out
4640          * @since 1.29
4641          */
4642         protected function addExplainConflictHeader( OutputPage $out ) {
4643                 $out->addHTML(
4644                         $this->getEditConflictHelper()->getExplainHeader()
4645                 );
4646         }
4647
4648         /**
4649          * @param string $name
4650          * @param mixed[] $customAttribs
4651          * @param User $user
4652          * @return mixed[]
4653          * @since 1.29
4654          */
4655         protected function buildTextboxAttribs( $name, array $customAttribs, User $user ) {
4656                 return ( new TextboxBuilder() )->buildTextboxAttribs(
4657                         $name, $customAttribs, $user, $this->mTitle
4658                 );
4659         }
4660
4661         /**
4662          * @param string $wikitext
4663          * @return string
4664          * @since 1.29
4665          */
4666         protected function addNewLineAtEnd( $wikitext ) {
4667                 return ( new TextboxBuilder() )->addNewLineAtEnd( $wikitext );
4668         }
4669
4670         /**
4671          * Turns section name wikitext into anchors for use in HTTP redirects. Various
4672          * versions of Microsoft browsers misinterpret fragment encoding of Location: headers
4673          * resulting in mojibake in address bar. Redirect them to legacy section IDs,
4674          * if possible. All the other browsers get HTML5 if the wiki is configured for it, to
4675          * spread the new style links more efficiently.
4676          *
4677          * @param string $text
4678          * @return string
4679          */
4680         private function guessSectionName( $text ) {
4681                 global $wgParser;
4682
4683                 // Detect Microsoft browsers
4684                 $userAgent = $this->context->getRequest()->getHeader( 'User-Agent' );
4685                 if ( $userAgent && preg_match( '/MSIE|Edge/', $userAgent ) ) {
4686                         // ...and redirect them to legacy encoding, if available
4687                         return $wgParser->guessLegacySectionNameFromWikiText( $text );
4688                 }
4689                 // Meanwhile, real browsers get real anchors
4690                 return $wgParser->guessSectionNameFromWikiText( $text );
4691         }
4692
4693         /**
4694          * Set a factory function to create an EditConflictHelper
4695          *
4696          * @param callable $factory Factory function
4697          * @since 1.31
4698          */
4699         public function setEditConflictHelperFactory( callable $factory ) {
4700                 $this->editConflictHelperFactory = $factory;
4701                 $this->editConflictHelper = null;
4702         }
4703
4704         /**
4705          * @return TextConflictHelper
4706          */
4707         private function getEditConflictHelper() {
4708                 if ( !$this->editConflictHelper ) {
4709                         $this->editConflictHelper = call_user_func(
4710                                 $this->editConflictHelperFactory,
4711                                 $this->getSubmitButtonLabel()
4712                         );
4713                 }
4714
4715                 return $this->editConflictHelper;
4716         }
4717
4718         /**
4719          * @param string $submitButtonLabel
4720          * @return TextConflictHelper
4721          */
4722         private function newTextConflictHelper( $submitButtonLabel ) {
4723                 return new TextConflictHelper(
4724                         $this->getTitle(),
4725                         $this->getContext()->getOutput(),
4726                         MediaWikiServices::getInstance()->getStatsdDataFactory(),
4727                         $submitButtonLabel
4728                 );
4729         }
4730 }