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 Whether an edit conflict needs to be resolved. Detected based on whether
 239          * $editRevId is different than the latest revision. When a conflict has successfully
 240          * been resolved by a 3-way-merge, this field is set to false.
 241          */
 242         public $isConflict = false;
 243
 244         /** @var bool New page or new section */
 245         public $isNew = false;
 246
 247         /** @var bool */
 248         public $deletedSinceEdit;
 249
 250         /** @var string */
 251         public $formtype;
 252
 253         /** @var bool
 254          * True the first time the edit form is rendered, false after re-rendering
 255          * with diff, save prompts, etc.
 256          */
 257         public $firsttime;
 258
 259         /** @var bool|stdClass */
 260         public $lastDelete;
 261
 262         /** @var bool */
 263         public $mTokenOk = false;
 264
 265         /** @var bool */
 266         public $mTokenOkExceptSuffix = false;
 267
 268         /** @var bool */
 269         public $mTriedSave = false;
 270
 271         /** @var bool */
 272         public $incompleteForm = false;
 273
 274         /** @var bool */
 275         public $tooBig = false;
 276
 277         /** @var bool */
 278         public $missingComment = false;
 279
 280         /** @var bool */
 281         public $missingSummary = false;
 282
 283         /** @var bool */
 284         public $allowBlankSummary = false;
 285
 286         /** @var bool */
 287         protected $blankArticle = false;
 288
 289         /** @var bool */
 290         protected $allowBlankArticle = false;
 291
 292         /** @var bool */
 293         protected $selfRedirect = false;
 294
 295         /** @var bool */
 296         protected $allowSelfRedirect = false;
 297
 298         /** @var string */
 299         public $autoSumm = '';
 300
 301         /** @var string */
 302         public $hookError = '';
 303
 304         /** @var ParserOutput */
 305         public $mParserOutput;
 306
 307         /** @var bool Has a summary been preset using GET parameter &summary= ? */
 308         public $hasPresetSummary = false;
 309
 310         /** @var Revision|bool|null A revision object corresponding to $this->editRevId. */
 311         public $mBaseRevision = false;
 312
 313         /** @var bool */
 314         public $mShowSummaryField = true;
 315
 316         # Form values
 317
 318         /** @var bool */
 319         public $save = false;
 320
 321         /** @var bool */
 322         public $preview = false;
 323
 324         /** @var bool */
 325         public $diff = false;
 326
 327         /** @var bool */
 328         public $minoredit = false;
 329
 330         /** @var bool */
 331         public $watchthis = false;
 332
 333         /** @var bool */
 334         public $recreate = false;
 335
 336         /** @var string
 337          * Page content input field.
 338          */
 339         public $textbox1 = '';
 340
 341         /** @var string */
 342         public $textbox2 = '';
 343
 344         /** @var string */
 345         public $summary = '';
 346
 347         /** @var bool
 348          * If true, hide the summary field.
 349          */
 350         public $nosummary = false;
 351
 352         /** @var string
 353          * Timestamp of the latest revision of the page when editing was initiated
 354          * on the client.
 355          */
 356         public $edittime = '';
 357
 358         /** @var int Revision ID of the latest revision of the page when editing
 359          * was initiated on the client.  This is used to detect and resolve edit
 360          * conflicts.
 361          *
 362          * @note 0 if the page did not exist at that time.
 363          * @note When starting an edit from an old revision, this still records the current
 364          * revision at the time, not the one the edit is based on.
 365          *
 366          * @see $oldid
 367          * @see getBaseRevision()
 368          */
 369         private $editRevId = null;
 370
 371         /** @var string */
 372         public $section = '';
 373
 374         /** @var string */
 375         public $sectiontitle = '';
 376
 377         /** @var string
 378          * Timestamp from the first time the edit form was rendered.
 379          */
 380         public $starttime = '';
 381
 382         /** @var int Revision ID the edit is based on, or 0 if it's the current revision.
 383          * FIXME: This isn't used in conflict resolution--provide a better
 384          * justification or merge with parentRevId.
 385          * @see $editRevId
 386          */
 387         public $oldid = 0;
 388
 389         /** @var int Revision ID the edit is based on, adjusted when an edit conflict is resolved.
 390          * @see $editRevId
 391          * @see $oldid
 392          * @see getparentRevId()
 393          */
 394         public $parentRevId = 0;
 395
 396         /** @var string */
 397         public $editintro = '';
 398
 399         /** @var null */
 400         public $scrolltop = null;
 401
 402         /** @var bool */
 403         public $bot = true;
 404
 405         /** @var string */
 406         public $contentModel;
 407
 408         /** @var null|string */
 409         public $contentFormat = null;
 410
 411         /** @var null|array */
 412         private $changeTags = null;
 413
 414         # Placeholders for text injection by hooks (must be HTML)
 415         # extensions should take care to _append_ to the present value
 416
 417         /** @var string Before even the preview */
 418         public $editFormPageTop = '';
 419         public $editFormTextTop = '';
 420         public $editFormTextBeforeContent = '';
 421         public $editFormTextAfterWarn = '';
 422         public $editFormTextAfterTools = '';
 423         public $editFormTextBottom = '';
 424         public $editFormTextAfterContent = '';
 425         public $previewTextAfterContent = '';
 426         public $mPreloadContent = null;
 427
 428         /* $didSave should be set to true whenever an article was successfully altered. */
 429         public $didSave = false;
 430         public $undidRev = 0;
 431
 432         public $suppressIntro = false;
 433
 434         /** @var bool */
 435         protected $edit;
 436
 437         /** @var bool|int */
 438         protected $contentLength = false;
 439
 440         /**
 441          * @var bool Set in ApiEditPage, based on ContentHandler::allowsDirectApiEditing
 442          */
 443         private $enableApiEditOverride = false;
 444
 445         /**
 446          * @var IContextSource
 447          */
 448         protected $context;
 449
 450         /**
 451          * @var bool Whether an old revision is edited
 452          */
 453         private $isOldRev = false;
 454
 455         /**
 456          * @var string|null What the user submitted in the 'wpUnicodeCheck' field
 457          */
 458         private $unicodeCheck;
 459
 460         /**
 461          * Factory function to create an edit conflict helper
 462          *
 463          * @var callable
 464          */
 465         private $editConflictHelperFactory;
 466
 467         /**
 468          * @var TextConflictHelper|null
 469          */
 470         private $editConflictHelper;
 471
 472         /**
 473          * @param Article $article
 474          */
 475         public function __construct( Article $article ) {
 476                 $this->mArticle = $article;
 477                 $this->page = $article->getPage(); // model object
 478                 $this->mTitle = $article->getTitle();
 479                 $this->context = $article->getContext();
 480
 481                 $this->contentModel = $this->mTitle->getContentModel();
 482
 483                 $handler = ContentHandler::getForModelID( $this->contentModel );
 484                 $this->contentFormat = $handler->getDefaultFormat();
 485                 $this->editConflictHelperFactory = [ $this, 'newTextConflictHelper' ];
 486         }
 487
 488         /**
 489          * @return Article
 490          */
 491         public function getArticle() {
 492                 return $this->mArticle;
 493         }
 494
 495         /**
 496          * @since 1.28
 497          * @return IContextSource
 498          */
 499         public function getContext() {
 500                 return $this->context;
 501         }
 502
 503         /**
 504          * @since 1.19
 505          * @return Title
 506          */
 507         public function getTitle() {
 508                 return $this->mTitle;
 509         }
 510
 511         /**
 512          * Set the context Title object
 513          *
 514          * @param Title|null $title Title object or null
 515          */
 516         public function setContextTitle( $title ) {
 517                 $this->mContextTitle = $title;
 518         }
 519
 520         /**
 521          * Get the context title object.
 522          *
 523          * If not set, $wgTitle will be returned, but this is deprecated. This will
 524          * throw an exception.
 525          *
 526          * @return Title
 527          */
 528         public function getContextTitle() {
 529                 if ( is_null( $this->mContextTitle ) ) {
 530                         wfDeprecated( __METHOD__ . ' called with no title set', '1.32' );
 531                         global $wgTitle;
 532                         return $wgTitle;
 533                 } else {
 534                         return $this->mContextTitle;
 535                 }
 536         }
 537
 538         /**
 539          * Returns if the given content model is editable.
 540          *
 541          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 542          * @return bool
 543          * @throws MWException If $modelId has no known handler
 544          */
 545         public function isSupportedContentModel( $modelId ) {
 546                 return $this->enableApiEditOverride === true ||
 547                         ContentHandler::getForModelID( $modelId )->supportsDirectEditing();
 548         }
 549
 550         /**
 551          * Allow editing of content that supports API direct editing, but not general
 552          * direct editing. Set to false by default.
 553          *
 554          * @param bool $enableOverride
 555          */
 556         public function setApiEditOverride( $enableOverride ) {
 557                 $this->enableApiEditOverride = $enableOverride;
 558         }
 559
 560         /**
 561          * @deprecated since 1.29, call edit directly
 562          */
 563         public function submit() {
 564                 wfDeprecated( __METHOD__, '1.29' );
 565                 $this->edit();
 566         }
 567
 568         /**
 569          * This is the function that gets called for "action=edit". It
 570          * sets up various member variables, then passes execution to
 571          * another function, usually showEditForm()
 572          *
 573          * The edit form is self-submitting, so that when things like
 574          * preview and edit conflicts occur, we get the same form back
 575          * with the extra stuff added.  Only when the final submission
 576          * is made and all is well do we actually save and redirect to
 577          * the newly-edited page.
 578          */
 579         public function edit() {
 580                 // Allow extensions to modify/prevent this form or submission
 581                 if ( !Hooks::run( 'AlternateEdit', [ $this ] ) ) {
 582                         return;
 583                 }
 584
 585                 wfDebug( __METHOD__ . ": enter\n" );
 586
 587                 $request = $this->context->getRequest();
 588                 // If they used redlink=1 and the page exists, redirect to the main article
 589                 if ( $request->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 590                         $this->context->getOutput()->redirect( $this->mTitle->getFullURL() );
 591                         return;
 592                 }
 593
 594                 $this->importFormData( $request );
 595                 $this->firsttime = false;
 596
 597                 if ( wfReadOnly() && $this->save ) {
 598                         // Force preview
 599                         $this->save = false;
 600                         $this->preview = true;
 601                 }
 602
 603                 if ( $this->save ) {
 604                         $this->formtype = 'save';
 605                 } elseif ( $this->preview ) {
 606                         $this->formtype = 'preview';
 607                 } elseif ( $this->diff ) {
 608                         $this->formtype = 'diff';
 609                 } else { # First time through
 610                         $this->firsttime = true;
 611                         if ( $this->previewOnOpen() ) {
 612                                 $this->formtype = 'preview';
 613                         } else {
 614                                 $this->formtype = 'initial';
 615                         }
 616                 }
 617
 618                 $permErrors = $this->getEditPermissionErrors( $this->save ? 'secure' : 'full' );
 619                 if ( $permErrors ) {
 620                         wfDebug( __METHOD__ . ": User can't edit\n" );
 621
 622                         // track block with a cookie if it doesn't exists already
 623                         $this->context->getUser()->trackBlockWithCookie();
 624
 625                         // Auto-block user's IP if the account was "hard" blocked
 626                         if ( !wfReadOnly() ) {
 627                                 DeferredUpdates::addCallableUpdate( function () {
 628                                         $this->context->getUser()->spreadAnyEditBlock();
 629                                 } );
 630                         }
 631                         $this->displayPermissionsError( $permErrors );
 632
 633                         return;
 634                 }
 635
 636                 $revision = $this->mArticle->getRevisionFetched();
 637                 // Disallow editing revisions with content models different from the current one
 638                 // Undo edits being an exception in order to allow reverting content model changes.
 639                 if ( $revision
 640                         && $revision->getContentModel() !== $this->contentModel
 641                 ) {
 642                         $prevRev = null;
 643                         if ( $this->undidRev ) {
 644                                 $undidRevObj = Revision::newFromId( $this->undidRev );
 645                                 $prevRev = $undidRevObj ? $undidRevObj->getPrevious() : null;
 646                         }
 647                         if ( !$this->undidRev
 648                                 || !$prevRev
 649                                 || $prevRev->getContentModel() !== $this->contentModel
 650                         ) {
 651                                 $this->displayViewSourcePage(
 652                                         $this->getContentObject(),
 653                                         $this->context->msg(
 654                                                 'contentmodelediterror',
 655                                                 $revision->getContentModel(),
 656                                                 $this->contentModel
 657                                         )->plain()
 658                                 );
 659                                 return;
 660                         }
 661                 }
 662
 663                 $this->isConflict = false;
 664
 665                 # Show applicable editing introductions
 666                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 667                         $this->showIntro();
 668                 }
 669
 670                 # Attempt submission here.  This will check for edit conflicts,
 671                 # and redundantly check for locked database, blocked IPs, etc.
 672                 # that edit() already checked just in case someone tries to sneak
 673                 # in the back door with a hand-edited submission URL.
 674
 675                 if ( 'save' == $this->formtype ) {
 676                         $resultDetails = null;
 677                         $status = $this->attemptSave( $resultDetails );
 678                         if ( !$this->handleStatus( $status, $resultDetails ) ) {
 679                                 return;
 680                         }
 681                 }
 682
 683                 # First time through: get contents, set time for conflict
 684                 # checking, etc.
 685                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 686                         if ( $this->initialiseForm() === false ) {
 687                                 $out = $this->context->getOutput();
 688                                 if ( $out->getRedirect() === '' ) { // mcrundo hack redirects, don't override it
 689                                         $this->noSuchSectionPage();
 690                                 }
 691                                 return;
 692                         }
 693
 694                         if ( !$this->mTitle->getArticleID() ) {
 695                                 Hooks::run( 'EditFormPreloadText', [ &$this->textbox1, &$this->mTitle ] );
 696                         } else {
 697                                 Hooks::run( 'EditFormInitialText', [ $this ] );
 698                         }
 699
 700                 }
 701
 702                 $this->showEditForm();
 703         }
 704
 705         /**
 706          * @param string $rigor Same format as Title::getUserPermissionErrors()
 707          * @return array
 708          */
 709         protected function getEditPermissionErrors( $rigor = 'secure' ) {
 710                 $user = $this->context->getUser();
 711                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $user, $rigor );
 712                 # Can this title be created?
 713                 if ( !$this->mTitle->exists() ) {
 714                         $permErrors = array_merge(
 715                                 $permErrors,
 716                                 wfArrayDiff2(
 717                                         $this->mTitle->getUserPermissionsErrors( 'create', $user, $rigor ),
 718                                         $permErrors
 719                                 )
 720                         );
 721                 }
 722                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 723                 $remove = [];
 724                 foreach ( $permErrors as $error ) {
 725                         if ( ( $this->preview || $this->diff )
 726                                 && (
 727                                         $error[0] == 'blockedtext' ||
 728                                         $error[0] == 'autoblockedtext' ||
 729                                         $error[0] == 'systemblockedtext'
 730                                 )
 731                         ) {
 732                                 $remove[] = $error;
 733                         }
 734                 }
 735                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 736
 737                 return $permErrors;
 738         }
 739
 740         /**
 741          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 742          * but with the following differences:
 743          * - If redlink=1, the user will be redirected to the page
 744          * - If there is content to display or the error occurs while either saving,
 745          *   previewing or showing the difference, it will be a
 746          *   "View source for ..." page displaying the source code after the error message.
 747          *
 748          * @since 1.19
 749          * @param array $permErrors Array of permissions errors, as returned by
 750          *    Title::getUserPermissionsErrors().
 751          * @throws PermissionsError
 752          */
 753         protected function displayPermissionsError( array $permErrors ) {
 754                 $out = $this->context->getOutput();
 755                 if ( $this->context->getRequest()->getBool( 'redlink' ) ) {
 756                         // The edit page was reached via a red link.
 757                         // Redirect to the article page and let them click the edit tab if
 758                         // they really want a permission error.
 759                         $out->redirect( $this->mTitle->getFullURL() );
 760                         return;
 761                 }
 762
 763                 $content = $this->getContentObject();
 764
 765                 # Use the normal message if there's nothing to display
 766                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 767                         $action = $this->mTitle->exists() ? 'edit' :
 768                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 769                         throw new PermissionsError( $action, $permErrors );
 770                 }
 771
 772                 $this->displayViewSourcePage(
 773                         $content,
 774                         $out->formatPermissionsErrorMessage( $permErrors, 'edit' )
 775                 );
 776         }
 777
 778         /**
 779          * Display a read-only View Source page
 780          * @param Content $content
 781          * @param string $errorMessage additional wikitext error message to display
 782          */
 783         protected function displayViewSourcePage( Content $content, $errorMessage = '' ) {
 784                 $out = $this->context->getOutput();
 785                 Hooks::run( 'EditPage::showReadOnlyForm:initial', [ $this, &$out ] );
 786
 787                 $out->setRobotPolicy( 'noindex,nofollow' );
 788                 $out->setPageTitle( $this->context->msg(
 789                         'viewsource-title',
 790                         $this->getContextTitle()->getPrefixedText()
 791                 ) );
 792                 $out->addBacklinkSubtitle( $this->getContextTitle() );
 793                 $out->addHTML( $this->editFormPageTop );
 794                 $out->addHTML( $this->editFormTextTop );
 795
 796                 if ( $errorMessage !== '' ) {
 797                         $out->addWikiText( $errorMessage );
 798                         $out->addHTML( "<hr />\n" );
 799                 }
 800
 801                 # If the user made changes, preserve them when showing the markup
 802                 # (This happens when a user is blocked during edit, for instance)
 803                 if ( !$this->firsttime ) {
 804                         $text = $this->textbox1;
 805                         $out->addWikiMsg( 'viewyourtext' );
 806                 } else {
 807                         try {
 808                                 $text = $this->toEditText( $content );
 809                         } catch ( MWException $e ) {
 810                                 # Serialize using the default format if the content model is not supported
 811                                 # (e.g. for an old revision with a different model)
 812                                 $text = $content->serialize();
 813                         }
 814                         $out->addWikiMsg( 'viewsourcetext' );
 815                 }
 816
 817                 $out->addHTML( $this->editFormTextBeforeContent );
 818                 $this->showTextbox( $text, 'wpTextbox1', [ 'readonly' ] );
 819                 $out->addHTML( $this->editFormTextAfterContent );
 820
 821                 $out->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
 822
 823                 $out->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 824
 825                 $out->addHTML( $this->editFormTextBottom );
 826                 if ( $this->mTitle->exists() ) {
 827                         $out->returnToMain( null, $this->mTitle );
 828                 }
 829         }
 830
 831         /**
 832          * Should we show a preview when the edit form is first shown?
 833          *
 834          * @return bool
 835          */
 836         protected function previewOnOpen() {
 837                 $config = $this->context->getConfig();
 838                 $previewOnOpenNamespaces = $config->get( 'PreviewOnOpenNamespaces' );
 839                 $request = $this->context->getRequest();
 840                 if ( $config->get( 'RawHtml' ) ) {
 841                         // If raw HTML is enabled, disable preview on open
 842                         // since it has to be posted with a token for
 843                         // security reasons
 844                         return false;
 845                 }
 846                 if ( $request->getVal( 'preview' ) == 'yes' ) {
 847                         // Explicit override from request
 848                         return true;
 849                 } elseif ( $request->getVal( 'preview' ) == 'no' ) {
 850                         // Explicit override from request
 851                         return false;
 852                 } elseif ( $this->section == 'new' ) {
 853                         // Nothing *to* preview for new sections
 854                         return false;
 855                 } elseif ( ( $request->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 856                         && $this->context->getUser()->getOption( 'previewonfirst' )
 857                 ) {
 858                         // Standard preference behavior
 859                         return true;
 860                 } elseif ( !$this->mTitle->exists()
 861                         && isset( $previewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 862                         && $previewOnOpenNamespaces[$this->mTitle->getNamespace()]
 863                 ) {
 864                         // Categories are special
 865                         return true;
 866                 } else {
 867                         return false;
 868                 }
 869         }
 870
 871         /**
 872          * Checks whether the user entered a skin name in uppercase,
 873          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 874          *
 875          * @return bool
 876          */
 877         protected function isWrongCaseUserConfigPage() {
 878                 if ( $this->mTitle->isUserConfigPage() ) {
 879                         $name = $this->mTitle->getSkinFromConfigSubpage();
 880                         $skins = array_merge(
 881                                 array_keys( Skin::getSkinNames() ),
 882                                 [ 'common' ]
 883                         );
 884                         return !in_array( $name, $skins )
 885                                 && in_array( strtolower( $name ), $skins );
 886                 } else {
 887                         return false;
 888                 }
 889         }
 890
 891         /**
 892          * Returns whether section editing is supported for the current page.
 893          * Subclasses may override this to replace the default behavior, which is
 894          * to check ContentHandler::supportsSections.
 895          *
 896          * @return bool True if this edit page supports sections, false otherwise.
 897          */
 898         protected function isSectionEditSupported() {
 899                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 900                 return $contentHandler->supportsSections();
 901         }
 902
 903         /**
 904          * This function collects the form data and uses it to populate various member variables.
 905          * @param WebRequest &$request
 906          * @throws ErrorPageError
 907          */
 908         public function importFormData( &$request ) {
 909                 # Section edit can come from either the form or a link
 910                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 911
 912                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 913                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 914                 }
 915
 916                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 917
 918                 if ( $request->wasPosted() ) {
 919                         # These fields need to be checked for encoding.
 920                         # Also remove trailing whitespace, but don't remove _initial_
 921                         # whitespace from the text boxes. This may be significant formatting.
 922                         $this->textbox1 = rtrim( $request->getText( 'wpTextbox1' ) );
 923                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 924                                 // Skip this if wpTextbox2 has input, it indicates that we came
 925                                 // from a conflict page with raw page text, not a custom form
 926                                 // modified by subclasses
 927                                 $textbox1 = $this->importContentFormData( $request );
 928                                 if ( $textbox1 !== null ) {
 929                                         $this->textbox1 = $textbox1;
 930                                 }
 931                         }
 932
 933                         $this->unicodeCheck = $request->getText( 'wpUnicodeCheck' );
 934
 935                         $this->summary = $request->getText( 'wpSummary' );
 936
 937                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 938                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 939                         # section titles.
 940                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 941
 942                         # Treat sectiontitle the same way as summary.
 943                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 944                         # currently doing double duty as both edit summary and section title. Right now this
 945                         # is just to allow API edits to work around this limitation, but this should be
 946                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 947                         $this->sectiontitle = $request->getText( 'wpSectionTitle' );
 948                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 949
 950                         $this->edittime = $request->getVal( 'wpEdittime' );
 951                         $this->editRevId = $request->getIntOrNull( 'editRevId' );
 952                         $this->starttime = $request->getVal( 'wpStarttime' );
 953
 954                         $undidRev = $request->getInt( 'wpUndidRevision' );
 955                         if ( $undidRev ) {
 956                                 $this->undidRev = $undidRev;
 957                         }
 958
 959                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 960
 961                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 962                                 // wpTextbox1 field is missing, possibly due to being "too big"
 963                                 // according to some filter rules such as Suhosin's setting for
 964                                 // suhosin.request.max_value_length (d'oh)
 965                                 $this->incompleteForm = true;
 966                         } else {
 967                                 // If we receive the last parameter of the request, we can fairly
 968                                 // claim the POST request has not been truncated.
 969                                 $this->incompleteForm = !$request->getVal( 'wpUltimateParam' );
 970                         }
 971                         if ( $this->incompleteForm ) {
 972                                 # If the form is incomplete, force to preview.
 973                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 974                                 wfDebug( "POST DATA: " . var_export( $request->getPostValues(), true ) . "\n" );
 975                                 $this->preview = true;
 976                         } else {
 977                                 $this->preview = $request->getCheck( 'wpPreview' );
 978                                 $this->diff = $request->getCheck( 'wpDiff' );
 979
 980                                 // Remember whether a save was requested, so we can indicate
 981                                 // if we forced preview due to session failure.
 982                                 $this->mTriedSave = !$this->preview;
 983
 984                                 if ( $this->tokenOk( $request ) ) {
 985                                         # Some browsers will not report any submit button
 986                                         # if the user hits enter in the comment box.
 987                                         # The unmarked state will be assumed to be a save,
 988                                         # if the form seems otherwise complete.
 989                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 990                                 } elseif ( $this->diff ) {
 991                                         # Failed token check, but only requested "Show Changes".
 992                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 993                                 } else {
 994                                         # Page might be a hack attempt posted from
 995                                         # an external site. Preview instead of saving.
 996                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 997                                         $this->preview = true;
 998                                 }
 999                         }
1000                         $this->save = !$this->preview && !$this->diff;
1001                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
1002                                 $this->edittime = null;
1003                         }
1004
1005                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
1006                                 $this->starttime = null;
1007                         }
1008
1009                         $this->recreate = $request->getCheck( 'wpRecreate' );
1010
1011                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
1012                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
1013
1014                         $user = $this->context->getUser();
1015                         # Don't force edit summaries when a user is editing their own user or talk page
1016                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
1017                                 && $this->mTitle->getText() == $user->getName()
1018                         ) {
1019                                 $this->allowBlankSummary = true;
1020                         } else {
1021                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
1022                                         || !$user->getOption( 'forceeditsummary' );
1023                         }
1024
1025                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
1026
1027                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
1028                         $this->allowSelfRedirect = $request->getBool( 'wpIgnoreSelfRedirect' );
1029
1030                         $changeTags = $request->getVal( 'wpChangeTags' );
1031                         if ( is_null( $changeTags ) || $changeTags === '' ) {
1032                                 $this->changeTags = [];
1033                         } else {
1034                                 $this->changeTags = array_filter( array_map( 'trim', explode( ',',
1035                                         $changeTags ) ) );
1036                         }
1037                 } else {
1038                         # Not a posted form? Start with nothing.
1039                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
1040                         $this->textbox1 = '';
1041                         $this->summary = '';
1042                         $this->sectiontitle = '';
1043                         $this->edittime = '';
1044                         $this->editRevId = null;
1045                         $this->starttime = wfTimestampNow();
1046                         $this->edit = false;
1047                         $this->preview = false;
1048                         $this->save = false;
1049                         $this->diff = false;
1050                         $this->minoredit = false;
1051                         // Watch may be overridden by request parameters
1052                         $this->watchthis = $request->getBool( 'watchthis', false );
1053                         $this->recreate = false;
1054
1055                         // When creating a new section, we can preload a section title by passing it as the
1056                         // preloadtitle parameter in the URL (T15100)
1057                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
1058                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
1059                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
1060                                 $this->summary = $request->getVal( 'preloadtitle' );
1061                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) !== '' ) {
1062                                 $this->summary = $request->getText( 'summary' );
1063                                 if ( $this->summary !== '' ) {
1064                                         $this->hasPresetSummary = true;
1065                                 }
1066                         }
1067
1068                         if ( $request->getVal( 'minor' ) ) {
1069                                 $this->minoredit = true;
1070                         }
1071                 }
1072
1073                 $this->oldid = $request->getInt( 'oldid' );
1074                 $this->parentRevId = $request->getInt( 'parentRevId' );
1075
1076                 $this->bot = $request->getBool( 'bot', true );
1077                 $this->nosummary = $request->getBool( 'nosummary' );
1078
1079                 // May be overridden by revision.
1080                 $this->contentModel = $request->getText( 'model', $this->contentModel );
1081                 // May be overridden by revision.
1082                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
1083
1084                 try {
1085                         $handler = ContentHandler::getForModelID( $this->contentModel );
1086                 } catch ( MWUnknownContentModelException $e ) {
1087                         throw new ErrorPageError(
1088                                 'editpage-invalidcontentmodel-title',
1089                                 'editpage-invalidcontentmodel-text',
1090                                 [ wfEscapeWikiText( $this->contentModel ) ]
1091                         );
1092                 }
1093
1094                 if ( !$handler->isSupportedFormat( $this->contentFormat ) ) {
1095                         throw new ErrorPageError(
1096                                 'editpage-notsupportedcontentformat-title',
1097                                 'editpage-notsupportedcontentformat-text',
1098                                 [
1099                                         wfEscapeWikiText( $this->contentFormat ),
1100                                         wfEscapeWikiText( ContentHandler::getLocalizedName( $this->contentModel ) )
1101                                 ]
1102                         );
1103                 }
1104
1105                 /**
1106                  * @todo Check if the desired model is allowed in this namespace, and if
1107                  *   a transition from the page's current model to the new model is
1108                  *   allowed.
1109                  */
1110
1111                 $this->editintro = $request->getText( 'editintro',
1112                         // Custom edit intro for new sections
1113                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
1114
1115                 // Allow extensions to modify form data
1116                 Hooks::run( 'EditPage::importFormData', [ $this, $request ] );
1117         }
1118
1119         /**
1120          * Subpage overridable method for extracting the page content data from the
1121          * posted form to be placed in $this->textbox1, if using customized input
1122          * this method should be overridden and return the page text that will be used
1123          * for saving, preview parsing and so on...
1124          *
1125          * @param WebRequest &$request
1126          * @return string|null
1127          */
1128         protected function importContentFormData( &$request ) {
1129                 return; // Don't do anything, EditPage already extracted wpTextbox1
1130         }
1131
1132         /**
1133          * Initialise form fields in the object
1134          * Called on the first invocation, e.g. when a user clicks an edit link
1135          * @return bool If the requested section is valid
1136          */
1137         public function initialiseForm() {
1138                 $this->edittime = $this->page->getTimestamp();
1139                 $this->editRevId = $this->page->getLatest();
1140
1141                 $content = $this->getContentObject( false ); # TODO: track content object?!
1142                 if ( $content === false ) {
1143                         return false;
1144                 }
1145                 $this->textbox1 = $this->toEditText( $content );
1146
1147                 $user = $this->context->getUser();
1148                 // activate checkboxes if user wants them to be always active
1149                 # Sort out the "watch" checkbox
1150                 if ( $user->getOption( 'watchdefault' ) ) {
1151                         # Watch all edits
1152                         $this->watchthis = true;
1153                 } elseif ( $user->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1154                         # Watch creations
1155                         $this->watchthis = true;
1156                 } elseif ( $user->isWatched( $this->mTitle ) ) {
1157                         # Already watched
1158                         $this->watchthis = true;
1159                 }
1160                 if ( $user->getOption( 'minordefault' ) && !$this->isNew ) {
1161                         $this->minoredit = true;
1162                 }
1163                 if ( $this->textbox1 === false ) {
1164                         return false;
1165                 }
1166                 return true;
1167         }
1168
1169         /**
1170          * @param Content|null $def_content The default value to return
1171          *
1172          * @return Content|null Content on success, $def_content for invalid sections
1173          *
1174          * @since 1.21
1175          */
1176         protected function getContentObject( $def_content = null ) {
1177                 $content = false;
1178
1179                 $user = $this->context->getUser();
1180                 $request = $this->context->getRequest();
1181                 // For message page not locally set, use the i18n message.
1182                 // For other non-existent articles, use preload text if any.
1183                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
1184                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
1185                                 # If this is a system message, get the default text.
1186                                 $msg = $this->mTitle->getDefaultMessageText();
1187
1188                                 $content = $this->toEditContent( $msg );
1189                         }
1190                         if ( $content === false ) {
1191                                 # If requested, preload some text.
1192                                 $preload = $request->getVal( 'preload',
1193                                         // Custom preload text for new sections
1194                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1195                                 $params = $request->getArray( 'preloadparams', [] );
1196
1197                                 $content = $this->getPreloadedContent( $preload, $params );
1198                         }
1199                 // For existing pages, get text based on "undo" or section parameters.
1200                 } else {
1201                         if ( $this->section != '' ) {
1202                                 // Get section edit text (returns $def_text for invalid sections)
1203                                 $orig = $this->getOriginalContent( $user );
1204                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1205
1206                                 if ( !$content ) {
1207                                         $content = $def_content;
1208                                 }
1209                         } else {
1210                                 $undoafter = $request->getInt( 'undoafter' );
1211                                 $undo = $request->getInt( 'undo' );
1212
1213                                 if ( $undo > 0 && $undoafter > 0 ) {
1214                                         $undorev = Revision::newFromId( $undo );
1215                                         $oldrev = Revision::newFromId( $undoafter );
1216                                         $undoMsg = null;
1217
1218                                         # Sanity check, make sure it's the right page,
1219                                         # the revisions exist and they were not deleted.
1220                                         # Otherwise, $content will be left as-is.
1221                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1222                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1223                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT )
1224                                         ) {
1225                                                 if ( WikiPage::hasDifferencesOutsideMainSlot( $undorev, $oldrev ) ) {
1226                                                         // Hack for undo while EditPage can't handle multi-slot editing
1227                                                         $this->context->getOutput()->redirect( $this->mTitle->getFullURL( [
1228                                                                 'action' => 'mcrundo',
1229                                                                 'undo' => $undo,
1230                                                                 'undoafter' => $undoafter,
1231                                                         ] ) );
1232                                                         return false;
1233                                                 } else {
1234                                                         $content = $this->page->getUndoContent( $undorev, $oldrev );
1235
1236                                                         if ( $content === false ) {
1237                                                                 # Warn the user that something went wrong
1238                                                                 $undoMsg = 'failure';
1239                                                         }
1240                                                 }
1241
1242                                                 if ( $undoMsg === null ) {
1243                                                         $oldContent = $this->page->getContent( Revision::RAW );
1244                                                         $popts = ParserOptions::newFromUserAndLang(
1245                                                                 $user, MediaWikiServices::getInstance()->getContentLanguage() );
1246                                                         $newContent = $content->preSaveTransform( $this->mTitle, $user, $popts );
1247                                                         if ( $newContent->getModel() !== $oldContent->getModel() ) {
1248                                                                 // The undo may change content
1249                                                                 // model if its reverting the top
1250                                                                 // edit. This can result in
1251                                                                 // mismatched content model/format.
1252                                                                 $this->contentModel = $newContent->getModel();
1253                                                                 $this->contentFormat = $oldrev->getContentFormat();
1254                                                         }
1255
1256                                                         if ( $newContent->equals( $oldContent ) ) {
1257                                                                 # Tell the user that the undo results in no change,
1258                                                                 # i.e. the revisions were already undone.
1259                                                                 $undoMsg = 'nochange';
1260                                                                 $content = false;
1261                                                         } else {
1262                                                                 # Inform the user of our success and set an automatic edit summary
1263                                                                 $undoMsg = 'success';
1264
1265                                                                 # If we just undid one rev, use an autosummary
1266                                                                 $firstrev = $oldrev->getNext();
1267                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1268                                                                         $userText = $undorev->getUserText();
1269                                                                         if ( $userText === '' ) {
1270                                                                                 $undoSummary = $this->context->msg(
1271                                                                                         'undo-summary-username-hidden',
1272                                                                                         $undo
1273                                                                                 )->inContentLanguage()->text();
1274                                                                         } else {
1275                                                                                 $undoSummary = $this->context->msg(
1276                                                                                         'undo-summary',
1277                                                                                         $undo,
1278                                                                                         $userText
1279                                                                                 )->inContentLanguage()->text();
1280                                                                         }
1281                                                                         if ( $this->summary === '' ) {
1282                                                                                 $this->summary = $undoSummary;
1283                                                                         } else {
1284                                                                                 $this->summary = $undoSummary . $this->context->msg( 'colon-separator' )
1285                                                                                         ->inContentLanguage()->text() . $this->summary;
1286                                                                         }
1287                                                                         $this->undidRev = $undo;
1288                                                                 }
1289                                                                 $this->formtype = 'diff';
1290                                                         }
1291                                                 }
1292                                         } else {
1293                                                 // Failed basic sanity checks.
1294                                                 // Older revisions may have been removed since the link
1295                                                 // was created, or we may simply have got bogus input.
1296                                                 $undoMsg = 'norev';
1297                                         }
1298
1299                                         $out = $this->context->getOutput();
1300                                         // Messages: undo-success, undo-failure, undo-main-slot-only, undo-norev,
1301                                         // undo-nochange.
1302                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1303                                         $this->editFormPageTop .= $out->parse( "<div class=\"{$class}\">" .
1304                                                 $this->context->msg( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1305                                 }
1306
1307                                 if ( $content === false ) {
1308                                         $content = $this->getOriginalContent( $user );
1309                                 }
1310                         }
1311                 }
1312
1313                 return $content;
1314         }
1315
1316         /**
1317          * Get the content of the wanted revision, without section extraction.
1318          *
1319          * The result of this function can be used to compare user's input with
1320          * section replaced in its context (using WikiPage::replaceSectionAtRev())
1321          * to the original text of the edit.
1322          *
1323          * This differs from Article::getContent() that when a missing revision is
1324          * encountered the result will be null and not the
1325          * 'missing-revision' message.
1326          *
1327          * @since 1.19
1328          * @param User $user The user to get the revision for
1329          * @return Content|null
1330          */
1331         private function getOriginalContent( User $user ) {
1332                 if ( $this->section == 'new' ) {
1333                         return $this->getCurrentContent();
1334                 }
1335                 $revision = $this->mArticle->getRevisionFetched();
1336                 if ( $revision === null ) {
1337                         $handler = ContentHandler::getForModelID( $this->contentModel );
1338                         return $handler->makeEmptyContent();
1339                 }
1340                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1341                 return $content;
1342         }
1343
1344         /**
1345          * Get the edit's parent revision ID
1346          *
1347          * The "parent" revision is the ancestor that should be recorded in this
1348          * page's revision history.  It is either the revision ID of the in-memory
1349          * article content, or in the case of a 3-way merge in order to rebase
1350          * across a recoverable edit conflict, the ID of the newer revision to
1351          * which we have rebased this page.
1352          *
1353          * @since 1.27
1354          * @return int Revision ID
1355          */
1356         public function getParentRevId() {
1357                 if ( $this->parentRevId ) {
1358                         return $this->parentRevId;
1359                 } else {
1360                         return $this->mArticle->getRevIdFetched();
1361                 }
1362         }
1363
1364         /**
1365          * Get the current content of the page. This is basically similar to
1366          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1367          * content object is returned instead of null.
1368          *
1369          * @since 1.21
1370          * @return Content
1371          */
1372         protected function getCurrentContent() {
1373                 $rev = $this->page->getRevision();
1374                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1375
1376                 if ( $content === false || $content === null ) {
1377                         $handler = ContentHandler::getForModelID( $this->contentModel );
1378                         return $handler->makeEmptyContent();
1379                 } elseif ( !$this->undidRev ) {
1380                         // Content models should always be the same since we error
1381                         // out if they are different before this point (in ->edit()).
1382                         // The exception being, during an undo, the current revision might
1383                         // differ from the prior revision.
1384                         $logger = LoggerFactory::getInstance( 'editpage' );
1385                         if ( $this->contentModel !== $rev->getContentModel() ) {
1386                                 $logger->warning( "Overriding content model from current edit {prev} to {new}", [
1387                                         'prev' => $this->contentModel,
1388                                         'new' => $rev->getContentModel(),
1389                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1390                                         'method' => __METHOD__
1391                                 ] );
1392                                 $this->contentModel = $rev->getContentModel();
1393                         }
1394
1395                         // Given that the content models should match, the current selected
1396                         // format should be supported.
1397                         if ( !$content->isSupportedFormat( $this->contentFormat ) ) {
1398                                 $logger->warning( "Current revision content format unsupported. Overriding {prev} to {new}", [
1399
1400                                         'prev' => $this->contentFormat,
1401                                         'new' => $rev->getContentFormat(),
1402                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1403                                         'method' => __METHOD__
1404                                 ] );
1405                                 $this->contentFormat = $rev->getContentFormat();
1406                         }
1407                 }
1408                 return $content;
1409         }
1410
1411         /**
1412          * Use this method before edit() to preload some content into the edit box
1413          *
1414          * @param Content $content
1415          *
1416          * @since 1.21
1417          */
1418         public function setPreloadedContent( Content $content ) {
1419                 $this->mPreloadContent = $content;
1420         }
1421
1422         /**
1423          * Get the contents to be preloaded into the box, either set by
1424          * an earlier setPreloadText() or by loading the given page.
1425          *
1426          * @param string $preload Representing the title to preload from.
1427          * @param array $params Parameters to use (interface-message style) in the preloaded text
1428          *
1429          * @return Content
1430          *
1431          * @since 1.21
1432          */
1433         protected function getPreloadedContent( $preload, $params = [] ) {
1434                 if ( !empty( $this->mPreloadContent ) ) {
1435                         return $this->mPreloadContent;
1436                 }
1437
1438                 $handler = ContentHandler::getForModelID( $this->contentModel );
1439
1440                 if ( $preload === '' ) {
1441                         return $handler->makeEmptyContent();
1442                 }
1443
1444                 $user = $this->context->getUser();
1445                 $title = Title::newFromText( $preload );
1446                 # Check for existence to avoid getting MediaWiki:Noarticletext
1447                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $user ) ) {
1448                         // TODO: somehow show a warning to the user!
1449                         return $handler->makeEmptyContent();
1450                 }
1451
1452                 $page = WikiPage::factory( $title );
1453                 if ( $page->isRedirect() ) {
1454                         $title = $page->getRedirectTarget();
1455                         # Same as before
1456                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $user ) ) {
1457                                 // TODO: somehow show a warning to the user!
1458                                 return $handler->makeEmptyContent();
1459                         }
1460                         $page = WikiPage::factory( $title );
1461                 }
1462
1463                 $parserOptions = ParserOptions::newFromUser( $user );
1464                 $content = $page->getContent( Revision::RAW );
1465
1466                 if ( !$content ) {
1467                         // TODO: somehow show a warning to the user!
1468                         return $handler->makeEmptyContent();
1469                 }
1470
1471                 if ( $content->getModel() !== $handler->getModelID() ) {
1472                         $converted = $content->convert( $handler->getModelID() );
1473
1474                         if ( !$converted ) {
1475                                 // TODO: somehow show a warning to the user!
1476                                 wfDebug( "Attempt to preload incompatible content: " .
1477                                         "can't convert " . $content->getModel() .
1478                                         " to " . $handler->getModelID() );
1479
1480                                 return $handler->makeEmptyContent();
1481                         }
1482
1483                         $content = $converted;
1484                 }
1485
1486                 return $content->preloadTransform( $title, $parserOptions, $params );
1487         }
1488
1489         /**
1490          * Make sure the form isn't faking a user's credentials.
1491          *
1492          * @param WebRequest &$request
1493          * @return bool
1494          * @private
1495          */
1496         public function tokenOk( &$request ) {
1497                 $token = $request->getVal( 'wpEditToken' );
1498                 $user = $this->context->getUser();
1499                 $this->mTokenOk = $user->matchEditToken( $token );
1500                 $this->mTokenOkExceptSuffix = $user->matchEditTokenNoSuffix( $token );
1501                 return $this->mTokenOk;
1502         }
1503
1504         /**
1505          * Sets post-edit cookie indicating the user just saved a particular revision.
1506          *
1507          * This uses a temporary cookie for each revision ID so separate saves will never
1508          * interfere with each other.
1509          *
1510          * Article::view deletes the cookie on server-side after the redirect and
1511          * converts the value to the global JavaScript variable wgPostEdit.
1512          *
1513          * If the variable were set on the server, it would be cached, which is unwanted
1514          * since the post-edit state should only apply to the load right after the save.
1515          *
1516          * @param int $statusValue The status value (to check for new article status)
1517          */
1518         protected function setPostEditCookie( $statusValue ) {
1519                 $revisionId = $this->page->getLatest();
1520                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1521
1522                 $val = 'saved';
1523                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1524                         $val = 'created';
1525                 } elseif ( $this->oldid ) {
1526                         $val = 'restored';
1527                 }
1528
1529                 $response = $this->context->getRequest()->response();
1530                 $response->setCookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION );
1531         }
1532
1533         /**
1534          * Attempt submission
1535          * @param array|bool &$resultDetails See docs for $result in internalAttemptSave
1536          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1537          * @return Status The resulting status object.
1538          */
1539         public function attemptSave( &$resultDetails = false ) {
1540                 // TODO: MCR: treat $this->minoredit like $this->bot and check isAllowed( 'minoredit' )!
1541                 // Also, add $this->autopatrol like $this->bot and check isAllowed( 'autopatrol' )!
1542                 // This is needed since PageUpdater no longer checks these rights!
1543
1544                 // Allow bots to exempt some edits from bot flagging
1545                 $bot = $this->context->getUser()->isAllowed( 'bot' ) && $this->bot;
1546                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1547
1548                 Hooks::run( 'EditPage::attemptSave:after', [ $this, $status, $resultDetails ] );
1549
1550                 return $status;
1551         }
1552
1553         /**
1554          * Log when a page was successfully saved after the edit conflict view
1555          */
1556         private function incrementResolvedConflicts() {
1557                 if ( $this->context->getRequest()->getText( 'mode' ) !== 'conflict' ) {
1558                         return;
1559                 }
1560
1561                 $this->getEditConflictHelper()->incrementResolvedStats();
1562         }
1563
1564         /**
1565          * Handle status, such as after attempt save
1566          *
1567          * @param Status $status
1568          * @param array|bool $resultDetails
1569          *
1570          * @throws ErrorPageError
1571          * @return bool False, if output is done, true if rest of the form should be displayed
1572          */
1573         private function handleStatus( Status $status, $resultDetails ) {
1574                 /**
1575                  * @todo FIXME: once the interface for internalAttemptSave() is made
1576                  *   nicer, this should use the message in $status
1577                  */
1578                 if ( $status->value == self::AS_SUCCESS_UPDATE
1579                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1580                 ) {
1581                         $this->incrementResolvedConflicts();
1582
1583                         $this->didSave = true;
1584                         if ( !$resultDetails['nullEdit'] ) {
1585                                 $this->setPostEditCookie( $status->value );
1586                         }
1587                 }
1588
1589                 $out = $this->context->getOutput();
1590
1591                 // "wpExtraQueryRedirect" is a hidden input to modify
1592                 // after save URL and is not used by actual edit form
1593                 $request = $this->context->getRequest();
1594                 $extraQueryRedirect = $request->getVal( 'wpExtraQueryRedirect' );
1595
1596                 switch ( $status->value ) {
1597                         case self::AS_HOOK_ERROR_EXPECTED:
1598                         case self::AS_CONTENT_TOO_BIG:
1599                         case self::AS_ARTICLE_WAS_DELETED:
1600                         case self::AS_CONFLICT_DETECTED:
1601                         case self::AS_SUMMARY_NEEDED:
1602                         case self::AS_TEXTBOX_EMPTY:
1603                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1604                         case self::AS_END:
1605                         case self::AS_BLANK_ARTICLE:
1606                         case self::AS_SELF_REDIRECT:
1607                                 return true;
1608
1609                         case self::AS_HOOK_ERROR:
1610                                 return false;
1611
1612                         case self::AS_CANNOT_USE_CUSTOM_MODEL:
1613                         case self::AS_PARSE_ERROR:
1614                         case self::AS_UNICODE_NOT_SUPPORTED:
1615                                 $out->addWikiText( '<div class="error">' . "\n" . $status->getWikiText() . '</div>' );
1616                                 return true;
1617
1618                         case self::AS_SUCCESS_NEW_ARTICLE:
1619                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1620                                 if ( $extraQueryRedirect ) {
1621                                         if ( $query === '' ) {
1622                                                 $query = $extraQueryRedirect;
1623                                         } else {
1624                                                 $query = $query . '&' . $extraQueryRedirect;
1625                                         }
1626                                 }
1627                                 $anchor = $resultDetails['sectionanchor'] ?? '';
1628                                 $out->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1629                                 return false;
1630
1631                         case self::AS_SUCCESS_UPDATE:
1632                                 $extraQuery = '';
1633                                 $sectionanchor = $resultDetails['sectionanchor'];
1634
1635                                 // Give extensions a chance to modify URL query on update
1636                                 Hooks::run(
1637                                         'ArticleUpdateBeforeRedirect',
1638                                         [ $this->mArticle, &$sectionanchor, &$extraQuery ]
1639                                 );
1640
1641                                 if ( $resultDetails['redirect'] ) {
1642                                         if ( $extraQuery == '' ) {
1643                                                 $extraQuery = 'redirect=no';
1644                                         } else {
1645                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1646                                         }
1647                                 }
1648                                 if ( $extraQueryRedirect ) {
1649                                         if ( $extraQuery === '' ) {
1650                                                 $extraQuery = $extraQueryRedirect;
1651                                         } else {
1652                                                 $extraQuery = $extraQuery . '&' . $extraQueryRedirect;
1653                                         }
1654                                 }
1655
1656                                 $out->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1657                                 return false;
1658
1659                         case self::AS_SPAM_ERROR:
1660                                 $this->spamPageWithContent( $resultDetails['spam'] );
1661                                 return false;
1662
1663                         case self::AS_BLOCKED_PAGE_FOR_USER:
1664                                 throw new UserBlockedError( $this->context->getUser()->getBlock() );
1665
1666                         case self::AS_IMAGE_REDIRECT_ANON:
1667                         case self::AS_IMAGE_REDIRECT_LOGGED:
1668                                 throw new PermissionsError( 'upload' );
1669
1670                         case self::AS_READ_ONLY_PAGE_ANON:
1671                         case self::AS_READ_ONLY_PAGE_LOGGED:
1672                                 throw new PermissionsError( 'edit' );
1673
1674                         case self::AS_READ_ONLY_PAGE:
1675                                 throw new ReadOnlyError;
1676
1677                         case self::AS_RATE_LIMITED:
1678                                 throw new ThrottledError();
1679
1680                         case self::AS_NO_CREATE_PERMISSION:
1681                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1682                                 throw new PermissionsError( $permission );
1683
1684                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1685                                 throw new PermissionsError( 'editcontentmodel' );
1686
1687                         default:
1688                                 // We don't recognize $status->value. The only way that can happen
1689                                 // is if an extension hook aborted from inside ArticleSave.
1690                                 // Render the status object into $this->hookError
1691                                 // FIXME this sucks, we should just use the Status object throughout
1692                                 $this->hookError = '<div class="error">' ."\n" . $status->getWikiText() .
1693                                         '</div>';
1694                                 return true;
1695                 }
1696         }
1697
1698         /**
1699          * Run hooks that can filter edits just before they get saved.
1700          *
1701          * @param Content $content The Content to filter.
1702          * @param Status $status For reporting the outcome to the caller
1703          * @param User $user The user performing the edit
1704          *
1705          * @return bool
1706          */
1707         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1708                 // Run old style post-section-merge edit filter
1709                 if ( $this->hookError != '' ) {
1710                         # ...or the hook could be expecting us to produce an error
1711                         $status->fatal( 'hookaborted' );
1712                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1713                         return false;
1714                 }
1715
1716                 // Run new style post-section-merge edit filter
1717                 if ( !Hooks::run( 'EditFilterMergedContent',
1718                                 [ $this->context, $content, $status, $this->summary,
1719                                 $user, $this->minoredit ] )
1720                 ) {
1721                         # Error messages etc. could be handled within the hook...
1722                         if ( $status->isGood() ) {
1723                                 $status->fatal( 'hookaborted' );
1724                                 // Not setting $this->hookError here is a hack to allow the hook
1725                                 // to cause a return to the edit page without $this->hookError
1726                                 // being set. This is used by ConfirmEdit to display a captcha
1727                                 // without any error message cruft.
1728                         } else {
1729                                 $this->hookError = $this->formatStatusErrors( $status );
1730                         }
1731                         // Use the existing $status->value if the hook set it
1732                         if ( !$status->value ) {
1733                                 $status->value = self::AS_HOOK_ERROR;
1734                         }
1735                         return false;
1736                 } elseif ( !$status->isOK() ) {
1737                         # ...or the hook could be expecting us to produce an error
1738                         // FIXME this sucks, we should just use the Status object throughout
1739                         $this->hookError = $this->formatStatusErrors( $status );
1740                         $status->fatal( 'hookaborted' );
1741                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1742                         return false;
1743                 }
1744
1745                 return true;
1746         }
1747
1748         /**
1749          * Wrap status errors in an errorbox for increased visibility
1750          *
1751          * @param Status $status
1752          * @return string Wikitext
1753          */
1754         private function formatStatusErrors( Status $status ) {
1755                 $errmsg = $status->getWikiText(
1756                         'edit-error-short',
1757                         'edit-error-long',
1758                         $this->context->getLanguage()
1759                 );
1760                 return <<<ERROR
1761 <div class="errorbox">
1762 {$errmsg}
1763 </div>
1764 <br clear="all" />
1765 ERROR;
1766         }
1767
1768         /**
1769          * Return the summary to be used for a new section.
1770          *
1771          * @param string $sectionanchor Set to the section anchor text
1772          * @return string
1773          */
1774         private function newSectionSummary( &$sectionanchor = null ) {
1775                 global $wgParser;
1776
1777                 if ( $this->sectiontitle !== '' ) {
1778                         $sectionanchor = $this->guessSectionName( $this->sectiontitle );
1779                         // If no edit summary was specified, create one automatically from the section
1780                         // title and have it link to the new section. Otherwise, respect the summary as
1781                         // passed.
1782                         if ( $this->summary === '' ) {
1783                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1784                                 return $this->context->msg( 'newsectionsummary' )
1785                                         ->plaintextParams( $cleanSectionTitle )->inContentLanguage()->text();
1786                         }
1787                 } elseif ( $this->summary !== '' ) {
1788                         $sectionanchor = $this->guessSectionName( $this->summary );
1789                         # This is a new section, so create a link to the new section
1790                         # in the revision summary.
1791                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1792                         return $this->context->msg( 'newsectionsummary' )
1793                                 ->plaintextParams( $cleanSummary )->inContentLanguage()->text();
1794                 }
1795                 return $this->summary;
1796         }
1797
1798         /**
1799          * Attempt submission (no UI)
1800          *
1801          * @param array &$result Array to add statuses to, currently with the
1802          *   possible keys:
1803          *   - spam (string): Spam string from content if any spam is detected by
1804          *     matchSpamRegex.
1805          *   - sectionanchor (string): Section anchor for a section save.
1806          *   - nullEdit (bool): Set if doEditContent is OK.  True if null edit,
1807          *     false otherwise.
1808          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1809          *     revision is a redirect.
1810          * @param bool $bot True if edit is being made under the bot right.
1811          *
1812          * @return Status Status object, possibly with a message, but always with
1813          *   one of the AS_* constants in $status->value,
1814          *
1815          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1816          *   various error display idiosyncrasies. There are also lots of cases
1817          *   where error metadata is set in the object and retrieved later instead
1818          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1819          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1820          * time.
1821          */
1822         public function internalAttemptSave( &$result, $bot = false ) {
1823                 $status = Status::newGood();
1824                 $user = $this->context->getUser();
1825
1826                 if ( !Hooks::run( 'EditPage::attemptSave', [ $this ] ) ) {
1827                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1828                         $status->fatal( 'hookaborted' );
1829                         $status->value = self::AS_HOOK_ERROR;
1830                         return $status;
1831                 }
1832
1833                 if ( $this->unicodeCheck !== self::UNICODE_CHECK ) {
1834                         $status->fatal( 'unicode-support-fail' );
1835                         $status->value = self::AS_UNICODE_NOT_SUPPORTED;
1836                         return $status;
1837                 }
1838
1839                 $request = $this->context->getRequest();
1840                 $spam = $request->getText( 'wpAntispam' );
1841                 if ( $spam !== '' ) {
1842                         wfDebugLog(
1843                                 'SimpleAntiSpam',
1844                                 $user->getName() .
1845                                 ' editing "' .
1846                                 $this->mTitle->getPrefixedText() .
1847                                 '" submitted bogus field "' .
1848                                 $spam .
1849                                 '"'
1850                         );
1851                         $status->fatal( 'spamprotectionmatch', false );
1852                         $status->value = self::AS_SPAM_ERROR;
1853                         return $status;
1854                 }
1855
1856                 try {
1857                         # Construct Content object
1858                         $textbox_content = $this->toEditContent( $this->textbox1 );
1859                 } catch ( MWContentSerializationException $ex ) {
1860                         $status->fatal(
1861                                 'content-failed-to-parse',
1862                                 $this->contentModel,
1863                                 $this->contentFormat,
1864                                 $ex->getMessage()
1865                         );
1866                         $status->value = self::AS_PARSE_ERROR;
1867                         return $status;
1868                 }
1869
1870                 # Check image redirect
1871                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1872                         $textbox_content->isRedirect() &&
1873                         !$user->isAllowed( 'upload' )
1874                 ) {
1875                                 $code = $user->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1876                                 $status->setResult( false, $code );
1877
1878                                 return $status;
1879                 }
1880
1881                 # Check for spam
1882                 $match = self::matchSummarySpamRegex( $this->summary );
1883                 if ( $match === false && $this->section == 'new' ) {
1884                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1885                         # regular summaries, it is added to the actual wikitext.
1886                         if ( $this->sectiontitle !== '' ) {
1887                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1888                                 $match = self::matchSpamRegex( $this->sectiontitle );
1889                         } else {
1890                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1891                                 # is used with the 'summary' parameter.
1892                                 $match = self::matchSpamRegex( $this->summary );
1893                         }
1894                 }
1895                 if ( $match === false ) {
1896                         $match = self::matchSpamRegex( $this->textbox1 );
1897                 }
1898                 if ( $match !== false ) {
1899                         $result['spam'] = $match;
1900                         $ip = $request->getIP();
1901                         $pdbk = $this->mTitle->getPrefixedDBkey();
1902                         $match = str_replace( "\n", '', $match );
1903                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1904                         $status->fatal( 'spamprotectionmatch', $match );
1905                         $status->value = self::AS_SPAM_ERROR;
1906                         return $status;
1907                 }
1908                 if ( !Hooks::run(
1909                         'EditFilter',
1910                         [ $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ] )
1911                 ) {
1912                         # Error messages etc. could be handled within the hook...
1913                         $status->fatal( 'hookaborted' );
1914                         $status->value = self::AS_HOOK_ERROR;
1915                         return $status;
1916                 } elseif ( $this->hookError != '' ) {
1917                         # ...or the hook could be expecting us to produce an error
1918                         $status->fatal( 'hookaborted' );
1919                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1920                         return $status;
1921                 }
1922
1923                 if ( $user->isBlockedFrom( $this->mTitle, false ) ) {
1924                         // Auto-block user's IP if the account was "hard" blocked
1925                         if ( !wfReadOnly() ) {
1926                                 $user->spreadAnyEditBlock();
1927                         }
1928                         # Check block state against master, thus 'false'.
1929                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1930                         return $status;
1931                 }
1932
1933                 $this->contentLength = strlen( $this->textbox1 );
1934                 $config = $this->context->getConfig();
1935                 $maxArticleSize = $config->get( 'MaxArticleSize' );
1936                 if ( $this->contentLength > $maxArticleSize * 1024 ) {
1937                         // Error will be displayed by showEditForm()
1938                         $this->tooBig = true;
1939                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1940                         return $status;
1941                 }
1942
1943                 if ( !$user->isAllowed( 'edit' ) ) {
1944                         if ( $user->isAnon() ) {
1945                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1946                                 return $status;
1947                         } else {
1948                                 $status->fatal( 'readonlytext' );
1949                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1950                                 return $status;
1951                         }
1952                 }
1953
1954                 $changingContentModel = false;
1955                 if ( $this->contentModel !== $this->mTitle->getContentModel() ) {
1956                         if ( !$config->get( 'ContentHandlerUseDB' ) ) {
1957                                 $status->fatal( 'editpage-cannot-use-custom-model' );
1958                                 $status->value = self::AS_CANNOT_USE_CUSTOM_MODEL;
1959                                 return $status;
1960                         } elseif ( !$user->isAllowed( 'editcontentmodel' ) ) {
1961                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1962                                 return $status;
1963                         }
1964                         // Make sure the user can edit the page under the new content model too
1965                         $titleWithNewContentModel = clone $this->mTitle;
1966                         $titleWithNewContentModel->setContentModel( $this->contentModel );
1967                         if ( !$titleWithNewContentModel->userCan( 'editcontentmodel', $user )
1968                                 || !$titleWithNewContentModel->userCan( 'edit', $user )
1969                         ) {
1970                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1971                                 return $status;
1972                         }
1973
1974                         $changingContentModel = true;
1975                         $oldContentModel = $this->mTitle->getContentModel();
1976                 }
1977
1978                 if ( $this->changeTags ) {
1979                         $changeTagsStatus = ChangeTags::canAddTagsAccompanyingChange(
1980                                 $this->changeTags, $user );
1981                         if ( !$changeTagsStatus->isOK() ) {
1982                                 $changeTagsStatus->value = self::AS_CHANGE_TAG_ERROR;
1983                                 return $changeTagsStatus;
1984                         }
1985                 }
1986
1987                 if ( wfReadOnly() ) {
1988                         $status->fatal( 'readonlytext' );
1989                         $status->value = self::AS_READ_ONLY_PAGE;
1990                         return $status;
1991                 }
1992                 if ( $user->pingLimiter() || $user->pingLimiter( 'linkpurge', 0 )
1993                         || ( $changingContentModel && $user->pingLimiter( 'editcontentmodel' ) )
1994                 ) {
1995                         $status->fatal( 'actionthrottledtext' );
1996                         $status->value = self::AS_RATE_LIMITED;
1997                         return $status;
1998                 }
1999
2000                 # If the article has been deleted while editing, don't save it without
2001                 # confirmation
2002                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
2003                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
2004                         return $status;
2005                 }
2006
2007                 # Load the page data from the master. If anything changes in the meantime,
2008                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
2009                 $this->page->loadPageData( 'fromdbmaster' );
2010                 $new = !$this->page->exists();
2011
2012                 if ( $new ) {
2013                         // Late check for create permission, just in case *PARANOIA*
2014                         if ( !$this->mTitle->userCan( 'create', $user ) ) {
2015                                 $status->fatal( 'nocreatetext' );
2016                                 $status->value = self::AS_NO_CREATE_PERMISSION;
2017                                 wfDebug( __METHOD__ . ": no create permission\n" );
2018                                 return $status;
2019                         }
2020
2021                         // Don't save a new page if it's blank or if it's a MediaWiki:
2022                         // message with content equivalent to default (allow empty pages
2023                         // in this case to disable messages, see T52124)
2024                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
2025                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
2026                                 $defaultText = $defaultMessageText;
2027                         } else {
2028                                 $defaultText = '';
2029                         }
2030
2031                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
2032                                 $this->blankArticle = true;
2033                                 $status->fatal( 'blankarticle' );
2034                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
2035                                 return $status;
2036                         }
2037
2038                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $user ) ) {
2039                                 return $status;
2040                         }
2041
2042                         $content = $textbox_content;
2043
2044                         $result['sectionanchor'] = '';
2045                         if ( $this->section == 'new' ) {
2046                                 if ( $this->sectiontitle !== '' ) {
2047                                         // Insert the section title above the content.
2048                                         $content = $content->addSectionHeader( $this->sectiontitle );
2049                                 } elseif ( $this->summary !== '' ) {
2050                                         // Insert the section title above the content.
2051                                         $content = $content->addSectionHeader( $this->summary );
2052                                 }
2053                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
2054                         }
2055
2056                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
2057
2058                 } else { # not $new
2059
2060                         # Article exists. Check for edit conflict.
2061
2062                         $this->page->clear(); # Force reload of dates, etc.
2063                         $timestamp = $this->page->getTimestamp();
2064                         $latest = $this->page->getLatest();
2065
2066                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
2067
2068                         // An edit conflict is detected if the current revision is different from the
2069                         // revision that was current when editing was initiated on the client.
2070                         // This is checked based on the timestamp and revision ID.
2071                         // TODO: the timestamp based check can probably go away now.
2072                         if ( $timestamp != $this->edittime
2073                                 || ( $this->editRevId !== null && $this->editRevId != $latest )
2074                         ) {
2075                                 $this->isConflict = true;
2076                                 if ( $this->section == 'new' ) {
2077                                         if ( $this->page->getUserText() == $user->getName() &&
2078                                                 $this->page->getComment() == $this->newSectionSummary()
2079                                         ) {
2080                                                 // Probably a duplicate submission of a new comment.
2081                                                 // This can happen when CDN resends a request after
2082                                                 // a timeout but the first one actually went through.
2083                                                 wfDebug( __METHOD__
2084                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
2085                                         } else {
2086                                                 // New comment; suppress conflict.
2087                                                 $this->isConflict = false;
2088                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
2089                                         }
2090                                 } elseif ( $this->section == ''
2091                                         && Revision::userWasLastToEdit(
2092                                                 DB_MASTER, $this->mTitle->getArticleID(),
2093                                                 $user->getId(), $this->edittime
2094                                         )
2095                                 ) {
2096                                         # Suppress edit conflict with self, except for section edits where merging is required.
2097                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
2098                                         $this->isConflict = false;
2099                                 }
2100                         }
2101
2102                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
2103                         if ( $this->sectiontitle !== '' ) {
2104                                 $sectionTitle = $this->sectiontitle;
2105                         } else {
2106                                 $sectionTitle = $this->summary;
2107                         }
2108
2109                         $content = null;
2110
2111                         if ( $this->isConflict ) {
2112                                 wfDebug( __METHOD__
2113                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
2114                                         . " (id '{$this->editRevId}') (article time '{$timestamp}')\n" );
2115                                 // @TODO: replaceSectionAtRev() with base ID (not prior current) for ?oldid=X case
2116                                 // ...or disable section editing for non-current revisions (not exposed anyway).
2117                                 if ( $this->editRevId !== null ) {
2118                                         $content = $this->page->replaceSectionAtRev(
2119                                                 $this->section,
2120                                                 $textbox_content,
2121                                                 $sectionTitle,
2122                                                 $this->editRevId
2123                                         );
2124                                 } else {
2125                                         $content = $this->page->replaceSectionContent(
2126                                                 $this->section,
2127                                                 $textbox_content,
2128                                                 $sectionTitle,
2129                                                 $this->edittime
2130                                         );
2131                                 }
2132                         } else {
2133                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
2134                                 $content = $this->page->replaceSectionContent(
2135                                         $this->section,
2136                                         $textbox_content,
2137                                         $sectionTitle
2138                                 );
2139                         }
2140
2141                         if ( is_null( $content ) ) {
2142                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
2143                                 $this->isConflict = true;
2144                                 $content = $textbox_content; // do not try to merge here!
2145                         } elseif ( $this->isConflict ) {
2146                                 # Attempt merge
2147                                 if ( $this->mergeChangesIntoContent( $content ) ) {
2148                                         // Successful merge! Maybe we should tell the user the good news?
2149                                         $this->isConflict = false;
2150                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
2151                                 } else {
2152                                         $this->section = '';
2153                                         $this->textbox1 = ContentHandler::getContentText( $content );
2154                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
2155                                 }
2156                         }
2157
2158                         if ( $this->isConflict ) {
2159                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
2160                                 return $status;
2161                         }
2162
2163                         if ( !$this->runPostMergeFilters( $content, $status, $user ) ) {
2164                                 return $status;
2165                         }
2166
2167                         if ( $this->section == 'new' ) {
2168                                 // Handle the user preference to force summaries here
2169                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
2170                                         $this->missingSummary = true;
2171                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
2172                                         $status->value = self::AS_SUMMARY_NEEDED;
2173                                         return $status;
2174                                 }
2175
2176                                 // Do not allow the user to post an empty comment
2177                                 if ( $this->textbox1 == '' ) {
2178                                         $this->missingComment = true;
2179                                         $status->fatal( 'missingcommenttext' );
2180                                         $status->value = self::AS_TEXTBOX_EMPTY;
2181                                         return $status;
2182                                 }
2183                         } elseif ( !$this->allowBlankSummary
2184                                 && !$content->equals( $this->getOriginalContent( $user ) )
2185                                 && !$content->isRedirect()
2186                                 && md5( $this->summary ) == $this->autoSumm
2187                         ) {
2188                                 $this->missingSummary = true;
2189                                 $status->fatal( 'missingsummary' );
2190                                 $status->value = self::AS_SUMMARY_NEEDED;
2191                                 return $status;
2192                         }
2193
2194                         # All's well
2195                         $sectionanchor = '';
2196                         if ( $this->section == 'new' ) {
2197                                 $this->summary = $this->newSectionSummary( $sectionanchor );
2198                         } elseif ( $this->section != '' ) {
2199                                 # Try to get a section anchor from the section source, redirect
2200                                 # to edited section if header found.
2201                                 # XXX: Might be better to integrate this into Article::replaceSectionAtRev
2202                                 # for duplicate heading checking and maybe parsing.
2203                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
2204                                 # We can't deal with anchors, includes, html etc in the header for now,
2205                                 # headline would need to be parsed to improve this.
2206                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
2207                                         $sectionanchor = $this->guessSectionName( $matches[2] );
2208                                 }
2209                         }
2210                         $result['sectionanchor'] = $sectionanchor;
2211
2212                         // Save errors may fall down to the edit form, but we've now
2213                         // merged the section into full text. Clear the section field
2214                         // so that later submission of conflict forms won't try to
2215                         // replace that into a duplicated mess.
2216                         $this->textbox1 = $this->toEditText( $content );
2217                         $this->section = '';
2218
2219                         $status->value = self::AS_SUCCESS_UPDATE;
2220                 }
2221
2222                 if ( !$this->allowSelfRedirect
2223                         && $content->isRedirect()
2224                         && $content->getRedirectTarget()->equals( $this->getTitle() )
2225                 ) {
2226                         // If the page already redirects to itself, don't warn.
2227                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
2228                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
2229                                 $this->selfRedirect = true;
2230                                 $status->fatal( 'selfredirect' );
2231                                 $status->value = self::AS_SELF_REDIRECT;
2232                                 return $status;
2233                         }
2234                 }
2235
2236                 // Check for length errors again now that the section is merged in
2237                 $this->contentLength = strlen( $this->toEditText( $content ) );
2238                 if ( $this->contentLength > $maxArticleSize * 1024 ) {
2239                         $this->tooBig = true;
2240                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
2241                         return $status;
2242                 }
2243
2244                 $flags = EDIT_AUTOSUMMARY |
2245                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
2246                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
2247                         ( $bot ? EDIT_FORCE_BOT : 0 );
2248
2249                 $doEditStatus = $this->page->doEditContent(
2250                         $content,
2251                         $this->summary,
2252                         $flags,
2253                         false,
2254                         $user,
2255                         $content->getDefaultFormat(),
2256                         $this->changeTags,
2257                         $this->undidRev
2258                 );
2259
2260                 if ( !$doEditStatus->isOK() ) {
2261                         // Failure from doEdit()
2262                         // Show the edit conflict page for certain recognized errors from doEdit(),
2263                         // but don't show it for errors from extension hooks
2264                         $errors = $doEditStatus->getErrorsArray();
2265                         if ( in_array( $errors[0][0],
2266                                         [ 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ] )
2267                         ) {
2268                                 $this->isConflict = true;
2269                                 // Destroys data doEdit() put in $status->value but who cares
2270                                 $doEditStatus->value = self::AS_END;
2271                         }
2272                         return $doEditStatus;
2273                 }
2274
2275                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
2276                 if ( $result['nullEdit'] ) {
2277                         // We don't know if it was a null edit until now, so increment here
2278                         $user->pingLimiter( 'linkpurge' );
2279                 }
2280                 $result['redirect'] = $content->isRedirect();
2281
2282                 $this->updateWatchlist();
2283
2284                 // If the content model changed, add a log entry
2285                 if ( $changingContentModel ) {
2286                         $this->addContentModelChangeLogEntry(
2287                                 $user,
2288                                 $new ? false : $oldContentModel,
2289                                 $this->contentModel,
2290                                 $this->summary
2291                         );
2292                 }
2293
2294                 return $status;
2295         }
2296
2297         /**
2298          * @param User $user
2299          * @param string|false $oldModel false if the page is being newly created
2300          * @param string $newModel
2301          * @param string $reason
2302          */
2303         protected function addContentModelChangeLogEntry( User $user, $oldModel, $newModel, $reason ) {
2304                 $new = $oldModel === false;
2305                 $log = new ManualLogEntry( 'contentmodel', $new ? 'new' : 'change' );
2306                 $log->setPerformer( $user );
2307                 $log->setTarget( $this->mTitle );
2308                 $log->setComment( $reason );
2309                 $log->setParameters( [
2310                         '4::oldmodel' => $oldModel,
2311                         '5::newmodel' => $newModel
2312                 ] );
2313                 $logid = $log->insert();
2314                 $log->publish( $logid );
2315         }
2316
2317         /**
2318          * Register the change of watch status
2319          */
2320         protected function updateWatchlist() {
2321                 $user = $this->context->getUser();
2322                 if ( !$user->isLoggedIn() ) {
2323                         return;
2324                 }
2325
2326                 $title = $this->mTitle;
2327                 $watch = $this->watchthis;
2328                 // Do this in its own transaction to reduce contention...
2329                 DeferredUpdates::addCallableUpdate( function () use ( $user, $title, $watch ) {
2330                         if ( $watch == $user->isWatched( $title, User::IGNORE_USER_RIGHTS ) ) {
2331                                 return; // nothing to change
2332                         }
2333                         WatchAction::doWatchOrUnwatch( $watch, $title, $user );
2334                 } );
2335         }
2336
2337         /**
2338          * Attempts to do 3-way merge of edit content with a base revision
2339          * and current content, in case of edit conflict, in whichever way appropriate
2340          * for the content type.
2341          *
2342          * @since 1.21
2343          *
2344          * @param Content $editContent
2345          *
2346          * @return bool
2347          */
2348         private function mergeChangesIntoContent( &$editContent ) {
2349                 $db = wfGetDB( DB_MASTER );
2350
2351                 // This is the revision that was current at the time editing was initiated on the client,
2352                 // even if the edit was based on an old revision.
2353                 $baseRevision = $this->getBaseRevision();
2354                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
2355
2356                 if ( is_null( $baseContent ) ) {
2357                         return false;
2358                 }
2359
2360                 // The current state, we want to merge updates into it
2361                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2362                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2363
2364                 if ( is_null( $currentContent ) ) {
2365                         return false;
2366                 }
2367
2368                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2369
2370                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2371
2372                 if ( $result ) {
2373                         $editContent = $result;
2374                         // Update parentRevId to what we just merged.
2375                         $this->parentRevId = $currentRevision->getId();
2376                         return true;
2377                 }
2378
2379                 return false;
2380         }
2381
2382         /**
2383          * Returns the revision that was current at the time editing was initiated on the client,
2384          * even if the edit was based on an old revision.
2385          *
2386          * @warning this method is very poorly named. If the user opened the form with ?oldid=X,
2387          *        one might think of X as the "base revision", which is NOT what this returns,
2388          *        see oldid for that. One might further assume that this corresponds to the $baseRevId
2389          *        parameter of WikiPage::doEditContent, which is not the case either.
2390          *        getExpectedParentRevision() would perhaps be a better name.
2391          *
2392          * @return Revision|null Current version when editing was initiated on the client
2393          */
2394         public function getBaseRevision() {
2395                 if ( !$this->mBaseRevision ) {
2396                         $db = wfGetDB( DB_MASTER );
2397                         $this->mBaseRevision = $this->editRevId
2398                                 ? Revision::newFromId( $this->editRevId, Revision::READ_LATEST )
2399                                 : Revision::loadFromTimestamp( $db, $this->mTitle, $this->edittime );
2400                 }
2401                 return $this->mBaseRevision;
2402         }
2403
2404         /**
2405          * Check given input text against $wgSpamRegex, and return the text of the first match.
2406          *
2407          * @param string $text
2408          *
2409          * @return string|bool Matching string or false
2410          */
2411         public static function matchSpamRegex( $text ) {
2412                 global $wgSpamRegex;
2413                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2414                 $regexes = (array)$wgSpamRegex;
2415                 return self::matchSpamRegexInternal( $text, $regexes );
2416         }
2417
2418         /**
2419          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2420          *
2421          * @param string $text
2422          *
2423          * @return string|bool Matching string or false
2424          */
2425         public static function matchSummarySpamRegex( $text ) {
2426                 global $wgSummarySpamRegex;
2427                 $regexes = (array)$wgSummarySpamRegex;
2428                 return self::matchSpamRegexInternal( $text, $regexes );
2429         }
2430
2431         /**
2432          * @param string $text
2433          * @param array $regexes
2434          * @return bool|string
2435          */
2436         protected static function matchSpamRegexInternal( $text, $regexes ) {
2437                 foreach ( $regexes as $regex ) {
2438                         $matches = [];
2439                         if ( preg_match( $regex, $text, $matches ) ) {
2440                                 return $matches[0];
2441                         }
2442                 }
2443                 return false;
2444         }
2445
2446         public function setHeaders() {
2447                 $out = $this->context->getOutput();
2448
2449                 $out->addModules( 'mediawiki.action.edit' );
2450                 $out->addModuleStyles( 'mediawiki.action.edit.styles' );
2451                 $out->addModuleStyles( 'mediawiki.editfont.styles' );
2452
2453                 $user = $this->context->getUser();
2454                 if ( $user->getOption( 'showtoolbar' ) ) {
2455                         // The addition of default buttons is handled by getEditToolbar() which
2456                         // has its own dependency on this module. The call here ensures the module
2457                         // is loaded in time (it has position "top") for other modules to register
2458                         // buttons (e.g. extensions, gadgets, user scripts).
2459                         $out->addModules( 'mediawiki.toolbar' );
2460                 }
2461
2462                 if ( $user->getOption( 'uselivepreview' ) ) {
2463                         $out->addModules( 'mediawiki.action.edit.preview' );
2464                 }
2465
2466                 if ( $user->getOption( 'useeditwarning' ) ) {
2467                         $out->addModules( 'mediawiki.action.edit.editWarning' );
2468                 }
2469
2470                 # Enabled article-related sidebar, toplinks, etc.
2471                 $out->setArticleRelated( true );
2472
2473                 $contextTitle = $this->getContextTitle();
2474                 if ( $this->isConflict ) {
2475                         $msg = 'editconflict';
2476                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2477                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2478                 } else {
2479                         $msg = $contextTitle->exists()
2480                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2481                                         && $contextTitle->getDefaultMessageText() !== false
2482                                 )
2483                                 ? 'editing'
2484                                 : 'creating';
2485                 }
2486
2487                 # Use the title defined by DISPLAYTITLE magic word when present
2488                 # NOTE: getDisplayTitle() returns HTML while getPrefixedText() returns plain text.
2489                 #       setPageTitle() treats the input as wikitext, which should be safe in either case.
2490                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2491                 if ( $displayTitle === false ) {
2492                         $displayTitle = $contextTitle->getPrefixedText();
2493                 } else {
2494                         $out->setDisplayTitle( $displayTitle );
2495                 }
2496                 $out->setPageTitle( $this->context->msg( $msg, $displayTitle ) );
2497
2498                 $config = $this->context->getConfig();
2499
2500                 # Transmit the name of the message to JavaScript for live preview
2501                 # Keep Resources.php/mediawiki.action.edit.preview in sync with the possible keys
2502                 $out->addJsConfigVars( [
2503                         'wgEditMessage' => $msg,
2504                         'wgAjaxEditStash' => $config->get( 'AjaxEditStash' ),
2505                 ] );
2506
2507                 // Add whether to use 'save' or 'publish' messages to JavaScript for post-edit, other
2508                 // editors, etc.
2509                 $out->addJsConfigVars(
2510                         'wgEditSubmitButtonLabelPublish',
2511                         $config->get( 'EditSubmitButtonLabelPublish' )
2512                 );
2513         }
2514
2515         /**
2516          * Show all applicable editing introductions
2517          */
2518         protected function showIntro() {
2519                 if ( $this->suppressIntro ) {
2520                         return;
2521                 }
2522
2523                 $out = $this->context->getOutput();
2524                 $namespace = $this->mTitle->getNamespace();
2525
2526                 if ( $namespace == NS_MEDIAWIKI ) {
2527                         # Show a warning if editing an interface message
2528                         $out->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2529                         # If this is a default message (but not css, json, or js),
2530                         # show a hint that it is translatable on translatewiki.net
2531                         if (
2532                                 !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2533                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JSON )
2534                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2535                         ) {
2536                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2537                                 if ( $defaultMessageText !== false ) {
2538                                         $out->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2539                                                 'translateinterface' );
2540                                 }
2541                         }
2542                 } elseif ( $namespace == NS_FILE ) {
2543                         # Show a hint to shared repo
2544                         $file = wfFindFile( $this->mTitle );
2545                         if ( $file && !$file->isLocal() ) {
2546                                 $descUrl = $file->getDescriptionUrl();
2547                                 # there must be a description url to show a hint to shared repo
2548                                 if ( $descUrl ) {
2549                                         if ( !$this->mTitle->exists() ) {
2550                                                 $out->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", [
2551                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2552                                                 ] );
2553                                         } else {
2554                                                 $out->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", [
2555                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2556                                                 ] );
2557                                         }
2558                                 }
2559                         }
2560                 }
2561
2562                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2563                 # Show log extract when the user is currently blocked
2564                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2565                         $username = explode( '/', $this->mTitle->getText(), 2 )[0];
2566                         $user = User::newFromName( $username, false /* allow IP users */ );
2567                         $ip = User::isIP( $username );
2568                         $block = Block::newFromTarget( $user, $user );
2569                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2570                                 $out->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2571                                         [ 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ] );
2572                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
2573                                 # Show log extract if the user is currently blocked
2574                                 LogEventsList::showLogExtract(
2575                                         $out,
2576                                         'block',
2577                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2578                                         '',
2579                                         [
2580                                                 'lim' => 1,
2581                                                 'showIfEmpty' => false,
2582                                                 'msgKey' => [
2583                                                         'blocked-notice-logextract',
2584                                                         $user->getName() # Support GENDER in notice
2585                                                 ]
2586                                         ]
2587                                 );
2588                         }
2589                 }
2590                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2591                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2592                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2593                                 $this->context->msg( 'helppage' )->inContentLanguage()->text()
2594                         ) );
2595                         if ( $this->context->getUser()->isLoggedIn() ) {
2596                                 $out->wrapWikiMsg(
2597                                         // Suppress the external link icon, consider the help url an internal one
2598                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2599                                         [
2600                                                 'newarticletext',
2601                                                 $helpLink
2602                                         ]
2603                                 );
2604                         } else {
2605                                 $out->wrapWikiMsg(
2606                                         // Suppress the external link icon, consider the help url an internal one
2607                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2608                                         [
2609                                                 'newarticletextanon',
2610                                                 $helpLink
2611                                         ]
2612                                 );
2613                         }
2614                 }
2615                 # Give a notice if the user is editing a deleted/moved page...
2616                 if ( !$this->mTitle->exists() ) {
2617                         $dbr = wfGetDB( DB_REPLICA );
2618
2619                         LogEventsList::showLogExtract( $out, [ 'delete', 'move' ], $this->mTitle,
2620                                 '',
2621                                 [
2622                                         'lim' => 10,
2623                                         'conds' => [ 'log_action != ' . $dbr->addQuotes( 'revision' ) ],
2624                                         'showIfEmpty' => false,
2625                                         'msgKey' => [ 'recreate-moveddeleted-warn' ]
2626                                 ]
2627                         );
2628                 }
2629         }
2630
2631         /**
2632          * Attempt to show a custom editing introduction, if supplied
2633          *
2634          * @return bool
2635          */
2636         protected function showCustomIntro() {
2637                 if ( $this->editintro ) {
2638                         $title = Title::newFromText( $this->editintro );
2639                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2640                                 // Added using template syntax, to take <noinclude>'s into account.
2641                                 $this->context->getOutput()->addWikiTextTitleTidy(
2642                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2643                                         $this->mTitle
2644                                 );
2645                                 return true;
2646                         }
2647                 }
2648                 return false;
2649         }
2650
2651         /**
2652          * Gets an editable textual representation of $content.
2653          * The textual representation can be turned by into a Content object by the
2654          * toEditContent() method.
2655          *
2656          * If $content is null or false or a string, $content is returned unchanged.
2657          *
2658          * If the given Content object is not of a type that can be edited using
2659          * the text base EditPage, an exception will be raised. Set
2660          * $this->allowNonTextContent to true to allow editing of non-textual
2661          * content.
2662          *
2663          * @param Content|null|bool|string $content
2664          * @return string The editable text form of the content.
2665          *
2666          * @throws MWException If $content is not an instance of TextContent and
2667          *   $this->allowNonTextContent is not true.
2668          */
2669         protected function toEditText( $content ) {
2670                 if ( $content === null || $content === false || is_string( $content ) ) {
2671                         return $content;
2672                 }
2673
2674                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2675                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2676                 }
2677
2678                 return $content->serialize( $this->contentFormat );
2679         }
2680
2681         /**
2682          * Turns the given text into a Content object by unserializing it.
2683          *
2684          * If the resulting Content object is not of a type that can be edited using
2685          * the text base EditPage, an exception will be raised. Set
2686          * $this->allowNonTextContent to true to allow editing of non-textual
2687          * content.
2688          *
2689          * @param string|null|bool $text Text to unserialize
2690          * @return Content|bool|null The content object created from $text. If $text was false
2691          *   or null, false resp. null will be  returned instead.
2692          *
2693          * @throws MWException If unserializing the text results in a Content
2694          *   object that is not an instance of TextContent and
2695          *   $this->allowNonTextContent is not true.
2696          */
2697         protected function toEditContent( $text ) {
2698                 if ( $text === false || $text === null ) {
2699                         return $text;
2700                 }
2701
2702                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2703                         $this->contentModel, $this->contentFormat );
2704
2705                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2706                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2707                 }
2708
2709                 return $content;
2710         }
2711
2712         /**
2713          * Send the edit form and related headers to OutputPage
2714          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2715          *     during form output near the top, for captchas and the like.
2716          *
2717          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2718          * use the EditPage::showEditForm:fields hook instead.
2719          */
2720         public function showEditForm( $formCallback = null ) {
2721                 # need to parse the preview early so that we know which templates are used,
2722                 # otherwise users with "show preview after edit box" will get a blank list
2723                 # we parse this near the beginning so that setHeaders can do the title
2724                 # setting work instead of leaving it in getPreviewText
2725                 $previewOutput = '';
2726                 if ( $this->formtype == 'preview' ) {
2727                         $previewOutput = $this->getPreviewText();
2728                 }
2729
2730                 $out = $this->context->getOutput();
2731
2732                 // Avoid PHP 7.1 warning of passing $this by reference
2733                 $editPage = $this;
2734                 Hooks::run( 'EditPage::showEditForm:initial', [ &$editPage, &$out ] );
2735
2736                 $this->setHeaders();
2737
2738                 $this->addTalkPageText();
2739                 $this->addEditNotices();
2740
2741                 if ( !$this->isConflict &&
2742                         $this->section != '' &&
2743                         !$this->isSectionEditSupported() ) {
2744                         // We use $this->section to much before this and getVal('wgSection') directly in other places
2745                         // at this point we can't reset $this->section to '' to fallback to non-section editing.
2746                         // Someone is welcome to try refactoring though
2747                         $out->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2748                         return;
2749                 }
2750
2751                 $this->showHeader();
2752
2753                 $out->addHTML( $this->editFormPageTop );
2754
2755                 $user = $this->context->getUser();
2756                 if ( $user->getOption( 'previewontop' ) ) {
2757                         $this->displayPreviewArea( $previewOutput, true );
2758                 }
2759
2760                 $out->addHTML( $this->editFormTextTop );
2761
2762                 $showToolbar = true;
2763                 if ( $this->wasDeletedSinceLastEdit() ) {
2764                         if ( $this->formtype == 'save' ) {
2765                                 // Hide the toolbar and edit area, user can click preview to get it back
2766                                 // Add an confirmation checkbox and explanation.
2767                                 $showToolbar = false;
2768                         } else {
2769                                 $out->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2770                                         'deletedwhileediting' );
2771                         }
2772                 }
2773
2774                 // @todo add EditForm plugin interface and use it here!
2775                 //       search for textarea1 and textarea2, and allow EditForm to override all uses.
2776                 $out->addHTML( Html::openElement(
2777                         'form',
2778                         [
2779                                 'class' => 'mw-editform',
2780                                 'id' => self::EDITFORM_ID,
2781                                 'name' => self::EDITFORM_ID,
2782                                 'method' => 'post',
2783                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2784                                 'enctype' => 'multipart/form-data'
2785                         ]
2786                 ) );
2787
2788                 if ( is_callable( $formCallback ) ) {
2789                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2790                         call_user_func_array( $formCallback, [ &$out ] );
2791                 }
2792
2793                 // Add a check for Unicode support
2794                 $out->addHTML( Html::hidden( 'wpUnicodeCheck', self::UNICODE_CHECK ) );
2795
2796                 // Add an empty field to trip up spambots
2797                 $out->addHTML(
2798                         Xml::openElement( 'div', [ 'id' => 'antispam-container', 'style' => 'display: none;' ] )
2799                         . Html::rawElement(
2800                                 'label',
2801                                 [ 'for' => 'wpAntispam' ],
2802                                 $this->context->msg( 'simpleantispam-label' )->parse()
2803                         )
2804                         . Xml::element(
2805                                 'input',
2806                                 [
2807                                         'type' => 'text',
2808                                         'name' => 'wpAntispam',
2809                                         'id' => 'wpAntispam',
2810                                         'value' => ''
2811                                 ]
2812                         )
2813                         . Xml::closeElement( 'div' )
2814                 );
2815
2816                 // Avoid PHP 7.1 warning of passing $this by reference
2817                 $editPage = $this;
2818                 Hooks::run( 'EditPage::showEditForm:fields', [ &$editPage, &$out ] );
2819
2820                 // Put these up at the top to ensure they aren't lost on early form submission
2821                 $this->showFormBeforeText();
2822
2823                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2824                         $username = $this->lastDelete->user_name;
2825                         $comment = CommentStore::getStore()
2826                                 ->getComment( 'log_comment', $this->lastDelete )->text;
2827
2828                         // It is better to not parse the comment at all than to have templates expanded in the middle
2829                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2830                         $key = $comment === ''
2831                                 ? 'confirmrecreate-noreason'
2832                                 : 'confirmrecreate';
2833                         $out->addHTML(
2834                                 '<div class="mw-confirm-recreate">' .
2835                                         $this->context->msg( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2836                                 Xml::checkLabel( $this->context->msg( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2837                                         [ 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' ]
2838                                 ) .
2839                                 '</div>'
2840                         );
2841                 }
2842
2843                 # When the summary is hidden, also hide them on preview/show changes
2844                 if ( $this->nosummary ) {
2845                         $out->addHTML( Html::hidden( 'nosummary', true ) );
2846                 }
2847
2848                 # If a blank edit summary was previously provided, and the appropriate
2849                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2850                 # user being bounced back more than once in the event that a summary
2851                 # is not required.
2852                 # ####
2853                 # For a bit more sophisticated detection of blank summaries, hash the
2854                 # automatic one and pass that in the hidden field wpAutoSummary.
2855                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2856                         $out->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2857                 }
2858
2859                 if ( $this->undidRev ) {
2860                         $out->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2861                 }
2862
2863                 if ( $this->selfRedirect ) {
2864                         $out->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2865                 }
2866
2867                 if ( $this->hasPresetSummary ) {
2868                         // If a summary has been preset using &summary= we don't want to prompt for
2869                         // a different summary. Only prompt for a summary if the summary is blanked.
2870                         // (T19416)
2871                         $this->autoSumm = md5( '' );
2872                 }
2873
2874                 $autosumm = $this->autoSumm !== '' ? $this->autoSumm : md5( $this->summary );
2875                 $out->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2876
2877                 $out->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2878                 $out->addHTML( Html::hidden( 'parentRevId', $this->getParentRevId() ) );
2879
2880                 $out->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2881                 $out->addHTML( Html::hidden( 'model', $this->contentModel ) );
2882
2883                 $out->enableOOUI();
2884
2885                 if ( $this->section == 'new' ) {
2886                         $this->showSummaryInput( true, $this->summary );
2887                         $out->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2888                 }
2889
2890                 $out->addHTML( $this->editFormTextBeforeContent );
2891                 if ( $this->isConflict ) {
2892                         // In an edit conflict, we turn textbox2 into the user's text,
2893                         // and textbox1 into the stored version
2894                         $this->textbox2 = $this->textbox1;
2895
2896                         $content = $this->getCurrentContent();
2897                         $this->textbox1 = $this->toEditText( $content );
2898
2899                         $editConflictHelper = $this->getEditConflictHelper();
2900                         $editConflictHelper->setTextboxes( $this->textbox2, $this->textbox1 );
2901                         $editConflictHelper->setContentModel( $this->contentModel );
2902                         $editConflictHelper->setContentFormat( $this->contentFormat );
2903                         $out->addHTML( $editConflictHelper->getEditFormHtmlBeforeContent() );
2904                 }
2905
2906                 if ( !$this->mTitle->isUserConfigPage() && $showToolbar && $user->getOption( 'showtoolbar' ) ) {
2907                         $out->addHTML( self::getEditToolbar( $this->mTitle ) );
2908                 }
2909
2910                 if ( $this->blankArticle ) {
2911                         $out->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2912                 }
2913
2914                 if ( $this->isConflict ) {
2915                         // In an edit conflict bypass the overridable content form method
2916                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2917                         // resolved between page source edits and custom ui edits using the
2918                         // custom edit ui.
2919                         $conflictTextBoxAttribs = [];
2920                         if ( $this->wasDeletedSinceLastEdit() ) {
2921                                 $conflictTextBoxAttribs['style'] = 'display:none;';
2922                         } elseif ( $this->isOldRev ) {
2923                                 $conflictTextBoxAttribs['class'] = 'mw-textarea-oldrev';
2924                         }
2925
2926                         $out->addHTML( $editConflictHelper->getEditConflictMainTextBox( $conflictTextBoxAttribs ) );
2927                         $out->addHTML( $editConflictHelper->getEditFormHtmlAfterContent() );
2928                 } else {
2929                         $this->showContentForm();
2930                 }
2931
2932                 $out->addHTML( $this->editFormTextAfterContent );
2933
2934                 $this->showStandardInputs();
2935
2936                 $this->showFormAfterText();
2937
2938                 $this->showTosSummary();
2939
2940                 $this->showEditTools();
2941
2942                 $out->addHTML( $this->editFormTextAfterTools . "\n" );
2943
2944                 $out->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
2945
2946                 $out->addHTML( Html::rawElement( 'div', [ 'class' => 'hiddencats' ],
2947                         Linker::formatHiddenCategories( $this->page->getHiddenCategories() ) ) );
2948
2949                 $out->addHTML( Html::rawElement( 'div', [ 'class' => 'limitreport' ],
2950                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2951
2952                 $out->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2953
2954                 if ( $this->isConflict ) {
2955                         try {
2956                                 $this->showConflict();
2957                         } catch ( MWContentSerializationException $ex ) {
2958                                 // this can't really happen, but be nice if it does.
2959                                 $msg = $this->context->msg(
2960                                         'content-failed-to-parse',
2961                                         $this->contentModel,
2962                                         $this->contentFormat,
2963                                         $ex->getMessage()
2964                                 );
2965                                 $out->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2966                         }
2967                 }
2968
2969                 // Set a hidden field so JS knows what edit form mode we are in
2970                 if ( $this->isConflict ) {
2971                         $mode = 'conflict';
2972                 } elseif ( $this->preview ) {
2973                         $mode = 'preview';
2974                 } elseif ( $this->diff ) {
2975                         $mode = 'diff';
2976                 } else {
2977                         $mode = 'text';
2978                 }
2979                 $out->addHTML( Html::hidden( 'mode', $mode, [ 'id' => 'mw-edit-mode' ] ) );
2980
2981                 // Marker for detecting truncated form data.  This must be the last
2982                 // parameter sent in order to be of use, so do not move me.
2983                 $out->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2984                 $out->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2985
2986                 if ( !$user->getOption( 'previewontop' ) ) {
2987                         $this->displayPreviewArea( $previewOutput, false );
2988                 }
2989         }
2990
2991         /**
2992          * Wrapper around TemplatesOnThisPageFormatter to make
2993          * a "templates on this page" list.
2994          *
2995          * @param Title[] $templates
2996          * @return string HTML
2997          */
2998         public function makeTemplatesOnThisPageList( array $templates ) {
2999                 $templateListFormatter = new TemplatesOnThisPageFormatter(
3000                         $this->context, MediaWikiServices::getInstance()->getLinkRenderer()
3001                 );
3002
3003                 // preview if preview, else section if section, else false
3004                 $type = false;
3005                 if ( $this->preview ) {
3006                         $type = 'preview';
3007                 } elseif ( $this->section != '' ) {
3008                         $type = 'section';
3009                 }
3010
3011                 return Html::rawElement( 'div', [ 'class' => 'templatesUsed' ],
3012                         $templateListFormatter->format( $templates, $type )
3013                 );
3014         }
3015
3016         /**
3017          * Extract the section title from current section text, if any.
3018          *
3019          * @param string $text
3020          * @return string|bool String or false
3021          */
3022         public static function extractSectionTitle( $text ) {
3023                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
3024                 if ( !empty( $matches[2] ) ) {
3025                         global $wgParser;
3026                         return $wgParser->stripSectionName( trim( $matches[2] ) );
3027                 } else {
3028                         return false;
3029                 }
3030         }
3031
3032         protected function showHeader() {
3033                 $out = $this->context->getOutput();
3034                 $user = $this->context->getUser();
3035                 if ( $this->isConflict ) {
3036                         $this->addExplainConflictHeader( $out );
3037                         $this->editRevId = $this->page->getLatest();
3038                 } else {
3039                         if ( $this->section != '' && $this->section != 'new' ) {
3040                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
3041                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); // FIXME: use Content object
3042                                         if ( $sectionTitle !== false ) {
3043                                                 $this->summary = "/* $sectionTitle */ ";
3044                                         }
3045                                 }
3046                         }
3047
3048                         $buttonLabel = $this->context->msg( $this->getSubmitButtonLabel() )->text();
3049
3050                         if ( $this->missingComment ) {
3051                                 $out->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
3052                         }
3053
3054                         if ( $this->missingSummary && $this->section != 'new' ) {
3055                                 $out->wrapWikiMsg(
3056                                         "<div id='mw-missingsummary'>\n$1\n</div>",
3057                                         [ 'missingsummary', $buttonLabel ]
3058                                 );
3059                         }
3060
3061                         if ( $this->missingSummary && $this->section == 'new' ) {
3062                                 $out->wrapWikiMsg(
3063                                         "<div id='mw-missingcommentheader'>\n$1\n</div>",
3064                                         [ 'missingcommentheader', $buttonLabel ]
3065                                 );
3066                         }
3067
3068                         if ( $this->blankArticle ) {
3069                                 $out->wrapWikiMsg(
3070                                         "<div id='mw-blankarticle'>\n$1\n</div>",
3071                                         [ 'blankarticle', $buttonLabel ]
3072                                 );
3073                         }
3074
3075                         if ( $this->selfRedirect ) {
3076                                 $out->wrapWikiMsg(
3077                                         "<div id='mw-selfredirect'>\n$1\n</div>",
3078                                         [ 'selfredirect', $buttonLabel ]
3079                                 );
3080                         }
3081
3082                         if ( $this->hookError !== '' ) {
3083                                 $out->addWikiText( $this->hookError );
3084                         }
3085
3086                         if ( $this->section != 'new' ) {
3087                                 $revision = $this->mArticle->getRevisionFetched();
3088                                 if ( $revision ) {
3089                                         // Let sysop know that this will make private content public if saved
3090
3091                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $user ) ) {
3092                                                 $out->wrapWikiMsg(
3093                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
3094                                                         'rev-deleted-text-permission'
3095                                                 );
3096                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
3097                                                 $out->wrapWikiMsg(
3098                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
3099                                                         'rev-deleted-text-view'
3100                                                 );
3101                                         }
3102
3103                                         if ( !$revision->isCurrent() ) {
3104                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
3105                                                 $out->addWikiMsg( 'editingold' );
3106                                                 $this->isOldRev = true;
3107                                         }
3108                                 } elseif ( $this->mTitle->exists() ) {
3109                                         // Something went wrong
3110
3111                                         $out->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
3112                                                 [ 'missing-revision', $this->oldid ] );
3113                                 }
3114                         }
3115                 }
3116
3117                 if ( wfReadOnly() ) {
3118                         $out->wrapWikiMsg(
3119                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
3120                                 [ 'readonlywarning', wfReadOnlyReason() ]
3121                         );
3122                 } elseif ( $user->isAnon() ) {
3123                         if ( $this->formtype != 'preview' ) {
3124                                 $out->wrapWikiMsg(
3125                                         "<div id='mw-anon-edit-warning' class='warningbox'>\n$1\n</div>",
3126                                         [ 'anoneditwarning',
3127                                                 // Log-in link
3128                                                 SpecialPage::getTitleFor( 'Userlogin' )->getFullURL( [
3129                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
3130                                                 ] ),
3131                                                 // Sign-up link
3132                                                 SpecialPage::getTitleFor( 'CreateAccount' )->getFullURL( [
3133                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
3134                                                 ] )
3135                                         ]
3136                                 );
3137                         } else {
3138                                 $out->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\" class=\"warningbox\">\n$1</div>",
3139                                         'anonpreviewwarning'
3140                                 );
3141                         }
3142                 } else {
3143                         if ( $this->mTitle->isUserConfigPage() ) {
3144                                 # Check the skin exists
3145                                 if ( $this->isWrongCaseUserConfigPage() ) {
3146                                         $out->wrapWikiMsg(
3147                                                 "<div class='error' id='mw-userinvalidconfigtitle'>\n$1\n</div>",
3148                                                 [ 'userinvalidconfigtitle', $this->mTitle->getSkinFromConfigSubpage() ]
3149                                         );
3150                                 }
3151                                 if ( $this->getTitle()->isSubpageOf( $user->getUserPage() ) ) {
3152                                         $isUserCssConfig = $this->mTitle->isUserCssConfigPage();
3153                                         $isUserJsonConfig = $this->mTitle->isUserJsonConfigPage();
3154                                         $isUserJsConfig = $this->mTitle->isUserJsConfigPage();
3155
3156                                         $warning = $isUserCssConfig
3157                                                 ? 'usercssispublic'
3158                                                 : ( $isUserJsonConfig ? 'userjsonispublic' : 'userjsispublic' );
3159
3160                                         $out->wrapWikiMsg( '<div class="mw-userconfigpublic">$1</div>', $warning );
3161
3162                                         if ( $this->formtype !== 'preview' ) {
3163                                                 $config = $this->context->getConfig();
3164                                                 if ( $isUserCssConfig && $config->get( 'AllowUserCss' ) ) {
3165                                                         $out->wrapWikiMsg(
3166                                                                 "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
3167                                                                 [ 'usercssyoucanpreview' ]
3168                                                         );
3169                                                 } elseif ( $isUserJsonConfig /* No comparable 'AllowUserJson' */ ) {
3170                                                         $out->wrapWikiMsg(
3171                                                                 "<div id='mw-userjsonyoucanpreview'>\n$1\n</div>",
3172                                                                 [ 'userjsonyoucanpreview' ]
3173                                                         );
3174                                                 } elseif ( $isUserJsConfig && $config->get( 'AllowUserJs' ) ) {
3175                                                         $out->wrapWikiMsg(
3176                                                                 "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
3177                                                                 [ 'userjsyoucanpreview' ]
3178                                                         );
3179                                                 }
3180                                         }
3181                                 }
3182                         }
3183                 }
3184
3185                 $this->addPageProtectionWarningHeaders();
3186
3187                 $this->addLongPageWarningHeader();
3188
3189                 # Add header copyright warning
3190                 $this->showHeaderCopyrightWarning();
3191         }
3192
3193         /**
3194          * Helper function for summary input functions, which returns the necessary
3195          * attributes for the input.
3196          *
3197          * @param array|null $inputAttrs Array of attrs to use on the input
3198          * @return array
3199          */
3200         private function getSummaryInputAttributes( array $inputAttrs = null ) {
3201                 $conf = $this->context->getConfig();
3202                 $oldCommentSchema = $conf->get( 'CommentTableSchemaMigrationStage' ) === MIGRATION_OLD;
3203                 // HTML maxlength uses "UTF-16 code units", which means that characters outside BMP
3204                 // (e.g. emojis) count for two each. This limit is overridden in JS to instead count
3205                 // Unicode codepoints (or 255 UTF-8 bytes for old schema).
3206                 return ( is_array( $inputAttrs ) ? $inputAttrs : [] ) + [
3207                         'id' => 'wpSummary',
3208                         'name' => 'wpSummary',
3209                         'maxlength' => $oldCommentSchema ? 200 : CommentStore::COMMENT_CHARACTER_LIMIT,
3210                         'tabindex' => 1,
3211                         'size' => 60,
3212                         'spellcheck' => 'true',
3213                 ];
3214         }
3215
3216         /**
3217          * Builds a standard summary input with a label.
3218          *
3219          * @param string $summary The value of the summary input
3220          * @param string|null $labelText The html to place inside the label
3221          * @param array|null $inputAttrs Array of attrs to use on the input
3222          *
3223          * @return OOUI\FieldLayout OOUI FieldLayout with Label and Input
3224          */
3225         function getSummaryInputWidget( $summary = "", $labelText = null, $inputAttrs = null ) {
3226                 $inputAttrs = OOUI\Element::configFromHtmlAttributes(
3227                         $this->getSummaryInputAttributes( $inputAttrs )
3228                 );
3229                 $inputAttrs += [
3230                         'title' => Linker::titleAttrib( 'summary' ),
3231                         'accessKey' => Linker::accesskey( 'summary' ),
3232                 ];
3233
3234                 // For compatibility with old scripts and extensions, we want the legacy 'id' on the `<input>`
3235                 $inputAttrs['inputId'] = $inputAttrs['id'];
3236                 $inputAttrs['id'] = 'wpSummaryWidget';
3237
3238                 return new OOUI\FieldLayout(
3239                         new OOUI\TextInputWidget( [
3240                                 'value' => $summary,
3241                                 'infusable' => true,
3242                         ] + $inputAttrs ),
3243                         [
3244                                 'label' => new OOUI\HtmlSnippet( $labelText ),
3245                                 'align' => 'top',
3246                                 'id' => 'wpSummaryLabel',
3247                                 'classes' => [ $this->missingSummary ? 'mw-summarymissed' : 'mw-summary' ],
3248                         ]
3249                 );
3250         }
3251
3252         /**
3253          * @param bool $isSubjectPreview True if this is the section subject/title
3254          *   up top, or false if this is the comment summary
3255          *   down below the textarea
3256          * @param string $summary The text of the summary to display
3257          */
3258         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
3259                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
3260                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
3261                 if ( $isSubjectPreview ) {
3262                         if ( $this->nosummary ) {
3263                                 return;
3264                         }
3265                 } else {
3266                         if ( !$this->mShowSummaryField ) {
3267                                 return;
3268                         }
3269                 }
3270
3271                 $labelText = $this->context->msg( $isSubjectPreview ? 'subject' : 'summary' )->parse();
3272                 $this->context->getOutput()->addHTML( $this->getSummaryInputWidget(
3273                                 $summary,
3274                                 $labelText,
3275                                 [ 'class' => $summaryClass ]
3276                         ) );
3277         }
3278
3279         /**
3280          * @param bool $isSubjectPreview True if this is the section subject/title
3281          *   up top, or false if this is the comment summary
3282          *   down below the textarea
3283          * @param string $summary The text of the summary to display
3284          * @return string
3285          */
3286         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
3287                 // avoid spaces in preview, gets always trimmed on save
3288                 $summary = trim( $summary );
3289                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
3290                         return "";
3291                 }
3292
3293                 global $wgParser;
3294
3295                 if ( $isSubjectPreview ) {
3296                         $summary = $this->context->msg( 'newsectionsummary' )
3297                                 ->rawParams( $wgParser->stripSectionName( $summary ) )
3298                                 ->inContentLanguage()->text();
3299                 }
3300
3301                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
3302
3303                 $summary = $this->context->msg( $message )->parse()
3304                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
3305                 return Xml::tags( 'div', [ 'class' => 'mw-summary-preview' ], $summary );
3306         }
3307
3308         protected function showFormBeforeText() {
3309                 $out = $this->context->getOutput();
3310                 $out->addHTML( Html::hidden( 'wpSection', $this->section ) );
3311                 $out->addHTML( Html::hidden( 'wpStarttime', $this->starttime ) );
3312                 $out->addHTML( Html::hidden( 'wpEdittime', $this->edittime ) );
3313                 $out->addHTML( Html::hidden( 'editRevId', $this->editRevId ) );
3314                 $out->addHTML( Html::hidden( 'wpScrolltop', $this->scrolltop, [ 'id' => 'wpScrolltop' ] ) );
3315         }
3316
3317         protected function showFormAfterText() {
3318                 /**
3319                  * To make it harder for someone to slip a user a page
3320                  * which submits an edit form to the wiki without their
3321                  * knowledge, a random token is associated with the login
3322                  * session. If it's not passed back with the submission,
3323                  * we won't save the page, or render user JavaScript and
3324                  * CSS previews.
3325                  *
3326                  * For anon editors, who may not have a session, we just
3327                  * include the constant suffix to prevent editing from
3328                  * broken text-mangling proxies.
3329                  */
3330                 $this->context->getOutput()->addHTML(
3331                         "\n" .
3332                         Html::hidden( "wpEditToken", $this->context->getUser()->getEditToken() ) .
3333                         "\n"
3334                 );
3335         }
3336
3337         /**
3338          * Subpage overridable method for printing the form for page content editing
3339          * By default this simply outputs wpTextbox1
3340          * Subclasses can override this to provide a custom UI for editing;
3341          * be it a form, or simply wpTextbox1 with a modified content that will be
3342          * reverse modified when extracted from the post data.
3343          * Note that this is basically the inverse for importContentFormData
3344          */
3345         protected function showContentForm() {
3346                 $this->showTextbox1();
3347         }
3348
3349         /**
3350          * Method to output wpTextbox1
3351          * The $textoverride method can be used by subclasses overriding showContentForm
3352          * to pass back to this method.
3353          *
3354          * @param array|null $customAttribs Array of html attributes to use in the textarea
3355          * @param string|null $textoverride Optional text to override $this->textarea1 with
3356          */
3357         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
3358                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
3359                         $attribs = [ 'style' => 'display:none;' ];
3360                 } else {
3361                         $builder = new TextboxBuilder();
3362                         $classes = $builder->getTextboxProtectionCSSClasses( $this->getTitle() );
3363
3364                         # Is an old revision being edited?
3365                         if ( $this->isOldRev ) {
3366                                 $classes[] = 'mw-textarea-oldrev';
3367                         }
3368
3369                         $attribs = [ 'tabindex' => 1 ];
3370
3371                         if ( is_array( $customAttribs ) ) {
3372                                 $attribs += $customAttribs;
3373                         }
3374
3375                         $attribs = $builder->mergeClassesIntoAttributes( $classes, $attribs );
3376                 }
3377
3378                 $this->showTextbox(
3379                         $textoverride ?? $this->textbox1,
3380                         'wpTextbox1',
3381                         $attribs
3382                 );
3383         }
3384
3385         protected function showTextbox2() {
3386                 $this->showTextbox( $this->textbox2, 'wpTextbox2', [ 'tabindex' => 6, 'readonly' ] );
3387         }
3388
3389         protected function showTextbox( $text, $name, $customAttribs = [] ) {
3390                 $builder = new TextboxBuilder();
3391                 $attribs = $builder->buildTextboxAttribs(
3392                         $name,
3393                         $customAttribs,
3394                         $this->context->getUser(),
3395                         $this->mTitle
3396                 );
3397
3398                 $this->context->getOutput()->addHTML(
3399                         Html::textarea( $name, $builder->addNewLineAtEnd( $text ), $attribs )
3400                 );
3401         }
3402
3403         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
3404                 $classes = [];
3405                 if ( $isOnTop ) {
3406                         $classes[] = 'ontop';
3407                 }
3408
3409                 $attribs = [ 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) ];
3410
3411                 if ( $this->formtype != 'preview' ) {
3412                         $attribs['style'] = 'display: none;';
3413                 }
3414
3415                 $out = $this->context->getOutput();
3416                 $out->addHTML( Xml::openElement( 'div', $attribs ) );
3417
3418                 if ( $this->formtype == 'preview' ) {
3419                         $this->showPreview( $previewOutput );
3420                 } else {
3421                         // Empty content container for LivePreview
3422                         $pageViewLang = $this->mTitle->getPageViewLanguage();
3423                         $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3424                                 'class' => 'mw-content-' . $pageViewLang->getDir() ];
3425                         $out->addHTML( Html::rawElement( 'div', $attribs ) );
3426                 }
3427
3428                 $out->addHTML( '</div>' );
3429
3430                 if ( $this->formtype == 'diff' ) {
3431                         try {
3432                                 $this->showDiff();
3433                         } catch ( MWContentSerializationException $ex ) {
3434                                 $msg = $this->context->msg(
3435                                         'content-failed-to-parse',
3436                                         $this->contentModel,
3437                                         $this->contentFormat,
3438                                         $ex->getMessage()
3439                                 );
3440                                 $out->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3441                         }
3442                 }
3443         }
3444
3445         /**
3446          * Append preview output to OutputPage.
3447          * Includes category rendering if this is a category page.
3448          *
3449          * @param string $text The HTML to be output for the preview.
3450          */
3451         protected function showPreview( $text ) {
3452                 if ( $this->mArticle instanceof CategoryPage ) {
3453                         $this->mArticle->openShowCategory();
3454                 }
3455                 # This hook seems slightly odd here, but makes things more
3456                 # consistent for extensions.
3457                 $out = $this->context->getOutput();
3458                 Hooks::run( 'OutputPageBeforeHTML', [ &$out, &$text ] );
3459                 $out->addHTML( $text );
3460                 if ( $this->mArticle instanceof CategoryPage ) {
3461                         $this->mArticle->closeShowCategory();
3462                 }
3463         }
3464
3465         /**
3466          * Get a diff between the current contents of the edit box and the
3467          * version of the page we're editing from.
3468          *
3469          * If this is a section edit, we'll replace the section as for final
3470          * save and then make a comparison.
3471          */
3472         public function showDiff() {
3473                 $oldtitlemsg = 'currentrev';
3474                 # if message does not exist, show diff against the preloaded default
3475                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3476                         $oldtext = $this->mTitle->getDefaultMessageText();
3477                         if ( $oldtext !== false ) {
3478                                 $oldtitlemsg = 'defaultmessagetext';
3479                                 $oldContent = $this->toEditContent( $oldtext );
3480                         } else {
3481                                 $oldContent = null;
3482                         }
3483                 } else {
3484                         $oldContent = $this->getCurrentContent();
3485                 }
3486
3487                 $textboxContent = $this->toEditContent( $this->textbox1 );
3488                 if ( $this->editRevId !== null ) {
3489                         $newContent = $this->page->replaceSectionAtRev(
3490                                 $this->section, $textboxContent, $this->summary, $this->editRevId
3491                         );
3492                 } else {
3493                         $newContent = $this->page->replaceSectionContent(
3494                                 $this->section, $textboxContent, $this->summary, $this->edittime
3495                         );
3496                 }
3497
3498                 if ( $newContent ) {
3499                         Hooks::run( 'EditPageGetDiffContent', [ $this, &$newContent ] );
3500
3501                         $user = $this->context->getUser();
3502                         $popts = ParserOptions::newFromUserAndLang( $user,
3503                                 MediaWikiServices::getInstance()->getContentLanguage() );
3504                         $newContent = $newContent->preSaveTransform( $this->mTitle, $user, $popts );
3505                 }
3506
3507                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3508                         $oldtitle = $this->context->msg( $oldtitlemsg )->parse();
3509                         $newtitle = $this->context->msg( 'yourtext' )->parse();
3510
3511                         if ( !$oldContent ) {
3512                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3513                         }
3514
3515                         if ( !$newContent ) {
3516                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3517                         }
3518
3519                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->context );
3520                         $de->setContent( $oldContent, $newContent );
3521
3522                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3523                         $de->showDiffStyle();
3524                 } else {
3525                         $difftext = '';
3526                 }
3527
3528                 $this->context->getOutput()->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3529         }
3530
3531         /**
3532          * Show the header copyright warning.
3533          */
3534         protected function showHeaderCopyrightWarning() {
3535                 $msg = 'editpage-head-copy-warn';
3536                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3537                         $this->context->getOutput()->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3538                                 'editpage-head-copy-warn' );
3539                 }
3540         }
3541
3542         /**
3543          * Give a chance for site and per-namespace customizations of
3544          * terms of service summary link that might exist separately
3545          * from the copyright notice.
3546          *
3547          * This will display between the save button and the edit tools,
3548          * so should remain short!
3549          */
3550         protected function showTosSummary() {
3551                 $msg = 'editpage-tos-summary';
3552                 Hooks::run( 'EditPageTosSummary', [ $this->mTitle, &$msg ] );
3553                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3554                         $out = $this->context->getOutput();
3555                         $out->addHTML( '<div class="mw-tos-summary">' );
3556                         $out->addWikiMsg( $msg );
3557                         $out->addHTML( '</div>' );
3558                 }
3559         }
3560
3561         /**
3562          * Inserts optional text shown below edit and upload forms. Can be used to offer special
3563          * characters not present on most keyboards for copying/pasting.
3564          */
3565         protected function showEditTools() {
3566                 $this->context->getOutput()->addHTML( '<div class="mw-editTools">' .
3567                         $this->context->msg( 'edittools' )->inContentLanguage()->parse() .
3568                         '</div>' );
3569         }
3570
3571         /**
3572          * Get the copyright warning
3573          *
3574          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3575          * @return string
3576          */
3577         protected function getCopywarn() {
3578                 return self::getCopyrightWarning( $this->mTitle );
3579         }
3580
3581         /**
3582          * Get the copyright warning, by default returns wikitext
3583          *
3584          * @param Title $title
3585          * @param string $format Output format, valid values are any function of a Message object
3586          * @param Language|string|null $langcode Language code or Language object.
3587          * @return string
3588          */
3589         public static function getCopyrightWarning( $title, $format = 'plain', $langcode = null ) {
3590                 global $wgRightsText;
3591                 if ( $wgRightsText ) {
3592                         $copywarnMsg = [ 'copyrightwarning',
3593                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3594                                 $wgRightsText ];
3595                 } else {
3596                         $copywarnMsg = [ 'copyrightwarning2',
3597                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' ];
3598                 }
3599                 // Allow for site and per-namespace customization of contribution/copyright notice.
3600                 Hooks::run( 'EditPageCopyrightWarning', [ $title, &$copywarnMsg ] );
3601
3602                 $msg = wfMessage( ...$copywarnMsg )->title( $title );
3603                 if ( $langcode ) {
3604                         $msg->inLanguage( $langcode );
3605                 }
3606                 return "<div id=\"editpage-copywarn\">\n" .
3607                         $msg->$format() . "\n</div>";
3608         }
3609
3610         /**
3611          * Get the Limit report for page previews
3612          *
3613          * @since 1.22
3614          * @param ParserOutput|null $output ParserOutput object from the parse
3615          * @return string HTML
3616          */
3617         public static function getPreviewLimitReport( ParserOutput $output = null ) {
3618                 global $wgLang;
3619
3620                 if ( !$output || !$output->getLimitReportData() ) {
3621                         return '';
3622                 }
3623
3624                 $limitReport = Html::rawElement( 'div', [ 'class' => 'mw-limitReportExplanation' ],
3625                         wfMessage( 'limitreport-title' )->parseAsBlock()
3626                 );
3627
3628                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3629                 $limitReport .= Html::openElement( 'div', [ 'class' => 'preview-limit-report-wrapper' ] );
3630
3631                 $limitReport .= Html::openElement( 'table', [
3632                         'class' => 'preview-limit-report wikitable'
3633                 ] ) .
3634                         Html::openElement( 'tbody' );
3635
3636                 foreach ( $output->getLimitReportData() as $key => $value ) {
3637                         if ( Hooks::run( 'ParserLimitReportFormat',
3638                                 [ $key, &$value, &$limitReport, true, true ]
3639                         ) ) {
3640                                 $keyMsg = wfMessage( $key );
3641                                 $valueMsg = wfMessage( [ "$key-value-html", "$key-value" ] );
3642                                 if ( !$valueMsg->exists() ) {
3643                                         $valueMsg = new RawMessage( '$1' );
3644                                 }
3645                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3646                                         $limitReport .= Html::openElement( 'tr' ) .
3647                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3648                                                 Html::rawElement( 'td', null,
3649                                                         $wgLang->formatNum( $valueMsg->params( $value )->parse() )
3650                                                 ) .
3651                                                 Html::closeElement( 'tr' );
3652                                 }
3653                         }
3654                 }
3655
3656                 $limitReport .= Html::closeElement( 'tbody' ) .
3657                         Html::closeElement( 'table' ) .
3658                         Html::closeElement( 'div' );
3659
3660                 return $limitReport;
3661         }
3662
3663         protected function showStandardInputs( &$tabindex = 2 ) {
3664                 $out = $this->context->getOutput();
3665                 $out->addHTML( "<div class='editOptions'>\n" );
3666
3667                 if ( $this->section != 'new' ) {
3668                         $this->showSummaryInput( false, $this->summary );
3669                         $out->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3670                 }
3671
3672                 $checkboxes = $this->getCheckboxesWidget(
3673                         $tabindex,
3674                         [ 'minor' => $this->minoredit, 'watch' => $this->watchthis ]
3675                 );
3676                 $checkboxesHTML = new OOUI\HorizontalLayout( [ 'items' => $checkboxes ] );
3677
3678                 $out->addHTML( "<div class='editCheckboxes'>" . $checkboxesHTML . "</div>\n" );
3679
3680                 // Show copyright warning.
3681                 $out->addWikiText( $this->getCopywarn() );
3682                 $out->addHTML( $this->editFormTextAfterWarn );
3683
3684                 $out->addHTML( "<div class='editButtons'>\n" );
3685                 $out->addHTML( implode( "\n", $this->getEditButtons( $tabindex ) ) . "\n" );
3686
3687                 $cancel = $this->getCancelLink();
3688
3689                 $message = $this->context->msg( 'edithelppage' )->inContentLanguage()->text();
3690                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3691                 $edithelp =
3692                         Html::linkButton(
3693                                 $this->context->msg( 'edithelp' )->text(),
3694                                 [ 'target' => 'helpwindow', 'href' => $edithelpurl ],
3695                                 [ 'mw-ui-quiet' ]
3696                         ) .
3697                         $this->context->msg( 'word-separator' )->escaped() .
3698                         $this->context->msg( 'newwindow' )->parse();
3699
3700                 $out->addHTML( "        <span class='cancelLink'>{$cancel}</span>\n" );
3701                 $out->addHTML( "        <span class='editHelp'>{$edithelp}</span>\n" );
3702                 $out->addHTML( "</div><!-- editButtons -->\n" );
3703
3704                 Hooks::run( 'EditPage::showStandardInputs:options', [ $this, $out, &$tabindex ] );
3705
3706                 $out->addHTML( "</div><!-- editOptions -->\n" );
3707         }
3708
3709         /**
3710          * Show an edit conflict. textbox1 is already shown in showEditForm().
3711          * If you want to use another entry point to this function, be careful.
3712          */
3713         protected function showConflict() {
3714                 $out = $this->context->getOutput();
3715                 // Avoid PHP 7.1 warning of passing $this by reference
3716                 $editPage = $this;
3717                 if ( Hooks::run( 'EditPageBeforeConflictDiff', [ &$editPage, &$out ] ) ) {
3718                         $this->incrementConflictStats();
3719
3720                         $this->getEditConflictHelper()->showEditFormTextAfterFooters();
3721                 }
3722         }
3723
3724         protected function incrementConflictStats() {
3725                 $this->getEditConflictHelper()->incrementConflictStats();
3726         }
3727
3728         /**
3729          * @return string
3730          */
3731         public function getCancelLink() {
3732                 $cancelParams = [];
3733                 if ( !$this->isConflict && $this->oldid > 0 ) {
3734                         $cancelParams['oldid'] = $this->oldid;
3735                 } elseif ( $this->getContextTitle()->isRedirect() ) {
3736                         $cancelParams['redirect'] = 'no';
3737                 }
3738
3739                 return new OOUI\ButtonWidget( [
3740                         'id' => 'mw-editform-cancel',
3741                         'href' => $this->getContextTitle()->getLinkURL( $cancelParams ),
3742                         'label' => new OOUI\HtmlSnippet( $this->context->msg( 'cancel' )->parse() ),
3743                         'framed' => false,
3744                         'infusable' => true,
3745                         'flags' => 'destructive',
3746                 ] );
3747         }
3748
3749         /**
3750          * Returns the URL to use in the form's action attribute.
3751          * This is used by EditPage subclasses when simply customizing the action
3752          * variable in the constructor is not enough. This can be used when the
3753          * EditPage lives inside of a Special page rather than a custom page action.
3754          *
3755          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3756          * @return string
3757          */
3758         protected function getActionURL( Title $title ) {
3759                 return $title->getLocalURL( [ 'action' => $this->action ] );
3760         }
3761
3762         /**
3763          * Check if a page was deleted while the user was editing it, before submit.
3764          * Note that we rely on the logging table, which hasn't been always there,
3765          * but that doesn't matter, because this only applies to brand new
3766          * deletes.
3767          * @return bool
3768          */
3769         protected function wasDeletedSinceLastEdit() {
3770                 if ( $this->deletedSinceEdit !== null ) {
3771                         return $this->deletedSinceEdit;
3772                 }
3773
3774                 $this->deletedSinceEdit = false;
3775
3776                 if ( !$this->mTitle->exists() && $this->mTitle->isDeletedQuick() ) {
3777                         $this->lastDelete = $this->getLastDelete();
3778                         if ( $this->lastDelete ) {
3779                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3780                                 if ( $deleteTime > $this->starttime ) {
3781                                         $this->deletedSinceEdit = true;
3782                                 }
3783                         }
3784                 }
3785
3786                 return $this->deletedSinceEdit;
3787         }
3788
3789         /**
3790          * Get the last log record of this page being deleted, if ever.  This is
3791          * used to detect whether a delete occurred during editing.
3792          * @return bool|stdClass
3793          */
3794         protected function getLastDelete() {
3795                 $dbr = wfGetDB( DB_REPLICA );
3796                 $commentQuery = CommentStore::getStore()->getJoin( 'log_comment' );
3797                 $actorQuery = ActorMigration::newMigration()->getJoin( 'log_user' );
3798                 $data = $dbr->selectRow(
3799                         array_merge( [ 'logging' ], $commentQuery['tables'], $actorQuery['tables'], [ 'user' ] ),
3800                         [
3801                                 'log_type',
3802                                 'log_action',
3803                                 'log_timestamp',
3804                                 'log_namespace',
3805                                 'log_title',
3806                                 'log_params',
3807                                 'log_deleted',
3808                                 'user_name'
3809                         ] + $commentQuery['fields'] + $actorQuery['fields'],
3810                         [
3811                                 'log_namespace' => $this->mTitle->getNamespace(),
3812                                 'log_title' => $this->mTitle->getDBkey(),
3813                                 'log_type' => 'delete',
3814                                 'log_action' => 'delete',
3815                         ],
3816                         __METHOD__,
3817                         [ 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ],
3818                         [
3819                                 'user' => [ 'JOIN', 'user_id=' . $actorQuery['fields']['log_user'] ],
3820                         ] + $commentQuery['joins'] + $actorQuery['joins']
3821                 );
3822                 // Quick paranoid permission checks...
3823                 if ( is_object( $data ) ) {
3824                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3825                                 $data->user_name = $this->context->msg( 'rev-deleted-user' )->escaped();
3826                         }
3827
3828                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3829                                 $data->log_comment_text = $this->context->msg( 'rev-deleted-comment' )->escaped();
3830                                 $data->log_comment_data = null;
3831                         }
3832                 }
3833
3834                 return $data;
3835         }
3836
3837         /**
3838          * Get the rendered text for previewing.
3839          * @throws MWException
3840          * @return string
3841          */
3842         public function getPreviewText() {
3843                 $out = $this->context->getOutput();
3844                 $config = $this->context->getConfig();
3845
3846                 if ( $config->get( 'RawHtml' ) && !$this->mTokenOk ) {
3847                         // Could be an offsite preview attempt. This is very unsafe if
3848                         // HTML is enabled, as it could be an attack.
3849                         $parsedNote = '';
3850                         if ( $this->textbox1 !== '' ) {
3851                                 // Do not put big scary notice, if previewing the empty
3852                                 // string, which happens when you initially edit
3853                                 // a category page, due to automatic preview-on-open.
3854                                 $parsedNote = $out->parse( "<div class='previewnote'>" .
3855                                         $this->context->msg( 'session_fail_preview_html' )->text() . "</div>",
3856                                         true, /* interface */true );
3857                         }
3858                         $this->incrementEditFailureStats( 'session_loss' );
3859                         return $parsedNote;
3860                 }
3861
3862                 $note = '';
3863
3864                 try {
3865                         $content = $this->toEditContent( $this->textbox1 );
3866
3867                         $previewHTML = '';
3868                         if ( !Hooks::run(
3869                                 'AlternateEditPreview',
3870                                 [ $this, &$content, &$previewHTML, &$this->mParserOutput ] )
3871                         ) {
3872                                 return $previewHTML;
3873                         }
3874
3875                         # provide a anchor link to the editform
3876                         $continueEditing = '<span class="mw-continue-editing">' .
3877                                 '[[#' . self::EDITFORM_ID . '|' .
3878                                 $this->context->getLanguage()->getArrow() . ' ' .
3879                                 $this->context->msg( 'continue-editing' )->text() . ']]</span>';
3880                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3881                                 if ( $this->mTokenOkExceptSuffix ) {
3882                                         $note = $this->context->msg( 'token_suffix_mismatch' )->plain();
3883                                         $this->incrementEditFailureStats( 'bad_token' );
3884                                 } else {
3885                                         $note = $this->context->msg( 'session_fail_preview' )->plain();
3886                                         $this->incrementEditFailureStats( 'session_loss' );
3887                                 }
3888                         } elseif ( $this->incompleteForm ) {
3889                                 $note = $this->context->msg( 'edit_form_incomplete' )->plain();
3890                                 if ( $this->mTriedSave ) {
3891                                         $this->incrementEditFailureStats( 'incomplete_form' );
3892                                 }
3893                         } else {
3894                                 $note = $this->context->msg( 'previewnote' )->plain() . ' ' . $continueEditing;
3895                         }
3896
3897                         # don't parse non-wikitext pages, show message about preview
3898                         if ( $this->mTitle->isUserConfigPage() || $this->mTitle->isSiteConfigPage() ) {
3899                                 if ( $this->mTitle->isUserConfigPage() ) {
3900                                         $level = 'user';
3901                                 } elseif ( $this->mTitle->isSiteConfigPage() ) {
3902                                         $level = 'site';
3903                                 } else {
3904                                         $level = false;
3905                                 }
3906
3907                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3908                                         $format = 'css';
3909                                         if ( $level === 'user' && !$config->get( 'AllowUserCss' ) ) {
3910                                                 $format = false;
3911                                         }
3912                                 } elseif ( $content->getModel() == CONTENT_MODEL_JSON ) {
3913                                         $format = 'json';
3914                                         if ( $level === 'user' /* No comparable 'AllowUserJson' */ ) {
3915                                                 $format = false;
3916                                         }
3917                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3918                                         $format = 'js';
3919                                         if ( $level === 'user' && !$config->get( 'AllowUserJs' ) ) {
3920                                                 $format = false;
3921                                         }
3922                                 } else {
3923                                         $format = false;
3924                                 }
3925
3926                                 # Used messages to make sure grep find them:
3927                                 # Messages: usercsspreview, userjsonpreview, userjspreview,
3928                                 #   sitecsspreview, sitejsonpreview, sitejspreview
3929                                 if ( $level && $format ) {
3930                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3931                                                 $this->context->msg( "{$level}{$format}preview" )->text() .
3932                                                 ' ' . $continueEditing . "</div>";
3933                                 }
3934                         }
3935
3936                         # If we're adding a comment, we need to show the
3937                         # summary as the headline
3938                         if ( $this->section === "new" && $this->summary !== "" ) {
3939                                 $content = $content->addSectionHeader( $this->summary );
3940                         }
3941
3942                         $hook_args = [ $this, &$content ];
3943                         Hooks::run( 'EditPageGetPreviewContent', $hook_args );
3944
3945                         $parserResult = $this->doPreviewParse( $content );
3946                         $parserOutput = $parserResult['parserOutput'];
3947                         $previewHTML = $parserResult['html'];
3948                         $this->mParserOutput = $parserOutput;
3949                         $out->addParserOutputMetadata( $parserOutput );
3950                         if ( $out->userCanPreview() ) {
3951                                 $out->addContentOverride( $this->getTitle(), $content );
3952                         }
3953
3954                         if ( count( $parserOutput->getWarnings() ) ) {
3955                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3956                         }
3957
3958                 } catch ( MWContentSerializationException $ex ) {
3959                         $m = $this->context->msg(
3960                                 'content-failed-to-parse',
3961                                 $this->contentModel,
3962                                 $this->contentFormat,
3963                                 $ex->getMessage()
3964                         );
3965                         $note .= "\n\n" . $m->parse();
3966                         $previewHTML = '';
3967                 }
3968
3969                 if ( $this->isConflict ) {
3970                         $conflict = '<h2 id="mw-previewconflict">'
3971                                 . $this->context->msg( 'previewconflict' )->escaped() . "</h2>\n";
3972                 } else {
3973                         $conflict = '<hr />';
3974                 }
3975
3976                 $previewhead = "<div class='previewnote'>\n" .
3977                         '<h2 id="mw-previewheader">' . $this->context->msg( 'preview' )->escaped() . "</h2>" .
3978                         $out->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3979
3980                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3981                 $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3982                         'class' => 'mw-content-' . $pageViewLang->getDir() ];
3983                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3984
3985                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3986         }
3987
3988         private function incrementEditFailureStats( $failureType ) {
3989                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
3990                 $stats->increment( 'edit.failures.' . $failureType );
3991         }
3992
3993         /**
3994          * Get parser options for a preview
3995          * @return ParserOptions
3996          */
3997         protected function getPreviewParserOptions() {
3998                 $parserOptions = $this->page->makeParserOptions( $this->context );
3999                 $parserOptions->setIsPreview( true );
4000                 $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
4001                 $parserOptions->enableLimitReport();
4002
4003                 // XXX: we could call $parserOptions->setCurrentRevisionCallback here to force the
4004                 // current revision to be null during PST, until setupFakeRevision is called on
4005                 // the ParserOptions. Currently, we rely on Parser::getRevisionObject() to ignore
4006                 // existing revisions in preview mode.
4007
4008                 return $parserOptions;
4009         }
4010
4011         /**
4012          * Parse the page for a preview. Subclasses may override this class, in order
4013          * to parse with different options, or to otherwise modify the preview HTML.
4014          *
4015          * @param Content $content The page content
4016          * @return array with keys:
4017          *   - parserOutput: The ParserOutput object
4018          *   - html: The HTML to be displayed
4019          */
4020         protected function doPreviewParse( Content $content ) {
4021                 $user = $this->context->getUser();
4022                 $parserOptions = $this->getPreviewParserOptions();
4023
4024                 // NOTE: preSaveTransform doesn't have a fake revision to operate on.
4025                 // Parser::getRevisionObject() will return null in preview mode,
4026                 // causing the context user to be used for {{subst:REVISIONUSER}}.
4027                 // XXX: Alternatively, we could also call setupFakeRevision() a second time:
4028                 // once before PST with $content, and then after PST with $pstContent.
4029                 $pstContent = $content->preSaveTransform( $this->mTitle, $user, $parserOptions );
4030                 $scopedCallback = $parserOptions->setupFakeRevision( $this->mTitle, $pstContent, $user );
4031                 $parserOutput = $pstContent->getParserOutput( $this->mTitle, null, $parserOptions );
4032                 ScopedCallback::consume( $scopedCallback );
4033                 return [
4034                         'parserOutput' => $parserOutput,
4035                         'html' => $parserOutput->getText( [
4036                                 'enableSectionEditLinks' => false
4037                         ] )
4038                 ];
4039         }
4040
4041         /**
4042          * @return array
4043          */
4044         public function getTemplates() {
4045                 if ( $this->preview || $this->section != '' ) {
4046                         $templates = [];
4047                         if ( !isset( $this->mParserOutput ) ) {
4048                                 return $templates;
4049                         }
4050                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
4051                                 foreach ( array_keys( $template ) as $dbk ) {
4052                                         $templates[] = Title::makeTitle( $ns, $dbk );
4053                                 }
4054                         }
4055                         return $templates;
4056                 } else {
4057                         return $this->mTitle->getTemplateLinksFrom();
4058                 }
4059         }
4060
4061         /**
4062          * Shows a bulletin board style toolbar for common editing functions.
4063          * It can be disabled in the user preferences.
4064          *
4065          * @param Title|null $title Title object for the page being edited (optional)
4066          * @return string
4067          */
4068         public static function getEditToolbar( $title = null ) {
4069                 global $wgOut, $wgEnableUploads, $wgForeignFileRepos;
4070
4071                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
4072                 $showSignature = true;
4073                 if ( $title ) {
4074                         $showSignature = MWNamespace::wantSignatures( $title->getNamespace() );
4075                 }
4076
4077                 $contLang = MediaWikiServices::getInstance()->getContentLanguage();
4078
4079                 /**
4080                  * $toolarray is an array of arrays each of which includes the
4081                  * opening tag, the closing tag, optionally a sample text that is
4082                  * inserted between the two when no selection is highlighted
4083                  * and.  The tip text is shown when the user moves the mouse
4084                  * over the button.
4085                  *
4086                  * Images are defined in ResourceLoaderEditToolbarModule.
4087                  */
4088                 $toolarray = [
4089                         [
4090                                 'id'     => 'mw-editbutton-bold',
4091                                 'open'   => '\'\'\'',
4092                                 'close'  => '\'\'\'',
4093                                 'sample' => wfMessage( 'bold_sample' )->text(),
4094                                 'tip'    => wfMessage( 'bold_tip' )->text(),
4095                         ],
4096                         [
4097                                 'id'     => 'mw-editbutton-italic',
4098                                 'open'   => '\'\'',
4099                                 'close'  => '\'\'',
4100                                 'sample' => wfMessage( 'italic_sample' )->text(),
4101                                 'tip'    => wfMessage( 'italic_tip' )->text(),
4102                         ],
4103                         [
4104                                 'id'     => 'mw-editbutton-link',
4105                                 'open'   => '[[',
4106                                 'close'  => ']]',
4107                                 'sample' => wfMessage( 'link_sample' )->text(),
4108                                 'tip'    => wfMessage( 'link_tip' )->text(),
4109                         ],
4110                         [
4111                                 'id'     => 'mw-editbutton-extlink',
4112                                 'open'   => '[',
4113                                 'close'  => ']',
4114                                 'sample' => wfMessage( 'extlink_sample' )->text(),
4115                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
4116                         ],
4117                         [
4118                                 'id'     => 'mw-editbutton-headline',
4119                                 'open'   => "\n== ",
4120                                 'close'  => " ==\n",
4121                                 'sample' => wfMessage( 'headline_sample' )->text(),
4122                                 'tip'    => wfMessage( 'headline_tip' )->text(),
4123                         ],
4124                         $imagesAvailable ? [
4125                                 'id'     => 'mw-editbutton-image',
4126                                 'open'   => '[[' . $contLang->getNsText( NS_FILE ) . ':',
4127                                 'close'  => ']]',
4128                                 'sample' => wfMessage( 'image_sample' )->text(),
4129                                 'tip'    => wfMessage( 'image_tip' )->text(),
4130                         ] : false,
4131                         $imagesAvailable ? [
4132                                 'id'     => 'mw-editbutton-media',
4133                                 'open'   => '[[' . $contLang->getNsText( NS_MEDIA ) . ':',
4134                                 'close'  => ']]',
4135                                 'sample' => wfMessage( 'media_sample' )->text(),
4136                                 'tip'    => wfMessage( 'media_tip' )->text(),
4137                         ] : false,
4138                         [
4139                                 'id'     => 'mw-editbutton-nowiki',
4140                                 'open'   => "<nowiki>",
4141                                 'close'  => "</nowiki>",
4142                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
4143                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
4144                         ],
4145                         $showSignature ? [
4146                                 'id'     => 'mw-editbutton-signature',
4147                                 'open'   => wfMessage( 'sig-text', '~~~~' )->inContentLanguage()->text(),
4148                                 'close'  => '',
4149                                 'sample' => '',
4150                                 'tip'    => wfMessage( 'sig_tip' )->text(),
4151                         ] : false,
4152                         [
4153                                 'id'     => 'mw-editbutton-hr',
4154                                 'open'   => "\n----\n",
4155                                 'close'  => '',
4156                                 'sample' => '',
4157                                 'tip'    => wfMessage( 'hr_tip' )->text(),
4158                         ]
4159                 ];
4160
4161                 $script = '';
4162                 foreach ( $toolarray as $tool ) {
4163                         if ( !$tool ) {
4164                                 continue;
4165                         }
4166
4167                         $params = [
4168                                 // Images are defined in ResourceLoaderEditToolbarModule
4169                                 false,
4170                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
4171                                 // Older browsers show a "speedtip" type message only for ALT.
4172                                 // Ideally these should be different, realistically they
4173                                 // probably don't need to be.
4174                                 $tool['tip'],
4175                                 $tool['open'],
4176                                 $tool['close'],
4177                                 $tool['sample'],
4178                                 $tool['id'],
4179                         ];
4180
4181                         $script .= Xml::encodeJsCall(
4182                                 'mw.toolbar.addButton',
4183                                 $params,
4184                                 ResourceLoader::inDebugMode()
4185                         );
4186                 }
4187
4188                 $toolbar = '<div id="toolbar"></div>';
4189
4190                 if ( Hooks::run( 'EditPageBeforeEditToolbar', [ &$toolbar ] ) ) {
4191                         // Only add the old toolbar cruft to the page payload if the toolbar has not
4192                         // been over-written by a hook caller
4193                         $nonce = $wgOut->getCSPNonce();
4194                         $wgOut->addScript( Html::inlineScript(
4195                                 ResourceLoader::makeInlineCodeWithModule( 'mediawiki.toolbar', $script ),
4196                                 $nonce
4197                         ) );
4198                 };
4199
4200                 return $toolbar;
4201         }
4202
4203         /**
4204          * Return an array of checkbox definitions.
4205          *
4206          * Array keys correspond to the `<input>` 'name' attribute to use for each checkbox.
4207          *
4208          * Array values are associative arrays with the following keys:
4209          *  - 'label-message' (required): message for label text
4210          *  - 'id' (required): 'id' attribute for the `<input>`
4211          *  - 'default' (required): default checkedness (true or false)
4212          *  - 'title-message' (optional): used to generate 'title' attribute for the `<label>`
4213          *  - 'tooltip' (optional): used to generate 'title' and 'accesskey' attributes
4214          *    from messages like 'tooltip-foo', 'accesskey-foo'
4215          *  - 'label-id' (optional): 'id' attribute for the `<label>`
4216          *  - 'legacy-name' (optional): short name for backwards-compatibility
4217          * @param array $checked Array of checkbox name (matching the 'legacy-name') => bool,
4218          *   where bool indicates the checked status of the checkbox
4219          * @return array
4220          */
4221         public function getCheckboxesDefinition( $checked ) {
4222                 $checkboxes = [];
4223
4224                 $user = $this->context->getUser();
4225                 // don't show the minor edit checkbox if it's a new page or section
4226                 if ( !$this->isNew && $user->isAllowed( 'minoredit' ) ) {
4227                         $checkboxes['wpMinoredit'] = [
4228                                 'id' => 'wpMinoredit',
4229                                 'label-message' => 'minoredit',
4230                                 // Uses messages: tooltip-minoredit, accesskey-minoredit
4231                                 'tooltip' => 'minoredit',
4232                                 'label-id' => 'mw-editpage-minoredit',
4233                                 'legacy-name' => 'minor',
4234                                 'default' => $checked['minor'],
4235                         ];
4236                 }
4237
4238                 if ( $user->isLoggedIn() ) {
4239                         $checkboxes['wpWatchthis'] = [
4240                                 'id' => 'wpWatchthis',
4241                                 'label-message' => 'watchthis',
4242                                 // Uses messages: tooltip-watch, accesskey-watch
4243                                 'tooltip' => 'watch',
4244                                 'label-id' => 'mw-editpage-watch',
4245                                 'legacy-name' => 'watch',
4246                                 'default' => $checked['watch'],
4247                         ];
4248                 }
4249
4250                 $editPage = $this;
4251                 Hooks::run( 'EditPageGetCheckboxesDefinition', [ $editPage, &$checkboxes ] );
4252
4253                 return $checkboxes;
4254         }
4255
4256         /**
4257          * Returns an array of checkboxes for the edit form, including 'minor' and 'watch' checkboxes and
4258          * any other added by extensions.
4259          *
4260          * @param int &$tabindex Current tabindex
4261          * @param array $checked Array of checkbox => bool, where bool indicates the checked
4262          *                 status of the checkbox
4263          *
4264          * @return array Associative array of string keys to OOUI\FieldLayout instances
4265          */
4266         public function getCheckboxesWidget( &$tabindex, $checked ) {
4267                 $checkboxes = [];
4268                 $checkboxesDef = $this->getCheckboxesDefinition( $checked );
4269
4270                 foreach ( $checkboxesDef as $name => $options ) {
4271                         $legacyName = $options['legacy-name'] ?? $name;
4272
4273                         $title = null;
4274                         $accesskey = null;
4275                         if ( isset( $options['tooltip'] ) ) {
4276                                 $accesskey = $this->context->msg( "accesskey-{$options['tooltip']}" )->text();
4277                                 $title = Linker::titleAttrib( $options['tooltip'] );
4278                         }
4279                         if ( isset( $options['title-message'] ) ) {
4280                                 $title = $this->context->msg( $options['title-message'] )->text();
4281                         }
4282
4283                         $checkboxes[ $legacyName ] = new OOUI\FieldLayout(
4284                                 new OOUI\CheckboxInputWidget( [
4285                                         'tabIndex' => ++$tabindex,
4286                                         'accessKey' => $accesskey,
4287                                         'id' => $options['id'] . 'Widget',
4288                                         'inputId' => $options['id'],
4289                                         'name' => $name,
4290                                         'selected' => $options['default'],
4291                                         'infusable' => true,
4292                                 ] ),
4293                                 [
4294                                         'align' => 'inline',
4295                                         'label' => new OOUI\HtmlSnippet( $this->context->msg( $options['label-message'] )->parse() ),
4296                                         'title' => $title,
4297                                         'id' => $options['label-id'] ?? null,
4298                                 ]
4299                         );
4300                 }
4301
4302                 return $checkboxes;
4303         }
4304
4305         /**
4306          * Get the message key of the label for the button to save the page
4307          *
4308          * @since 1.30
4309          * @return string
4310          */
4311         protected function getSubmitButtonLabel() {
4312                 $labelAsPublish =
4313                         $this->context->getConfig()->get( 'EditSubmitButtonLabelPublish' );
4314
4315                 // Can't use $this->isNew as that's also true if we're adding a new section to an extant page
4316                 $newPage = !$this->mTitle->exists();
4317
4318                 if ( $labelAsPublish ) {
4319                         $buttonLabelKey = $newPage ? 'publishpage' : 'publishchanges';
4320                 } else {
4321                         $buttonLabelKey = $newPage ? 'savearticle' : 'savechanges';
4322                 }
4323
4324                 return $buttonLabelKey;
4325         }
4326
4327         /**
4328          * Returns an array of html code of the following buttons:
4329          * save, diff and preview
4330          *
4331          * @param int &$tabindex Current tabindex
4332          *
4333          * @return array
4334          */
4335         public function getEditButtons( &$tabindex ) {
4336                 $buttons = [];
4337
4338                 $labelAsPublish =
4339                         $this->context->getConfig()->get( 'EditSubmitButtonLabelPublish' );
4340
4341                 $buttonLabel = $this->context->msg( $this->getSubmitButtonLabel() )->text();
4342                 $buttonTooltip = $labelAsPublish ? 'publish' : 'save';
4343
4344                 $buttons['save'] = new OOUI\ButtonInputWidget( [
4345                         'name' => 'wpSave',
4346                         'tabIndex' => ++$tabindex,
4347                         'id' => 'wpSaveWidget',
4348                         'inputId' => 'wpSave',
4349                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4350                         'useInputTag' => true,
4351                         'flags' => [ 'progressive', 'primary' ],
4352                         'label' => $buttonLabel,
4353                         'infusable' => true,
4354                         'type' => 'submit',
4355                         // Messages used: tooltip-save, tooltip-publish
4356                         'title' => Linker::titleAttrib( $buttonTooltip ),
4357                         // Messages used: accesskey-save, accesskey-publish
4358                         'accessKey' => Linker::accesskey( $buttonTooltip ),
4359                 ] );
4360
4361                 $buttons['preview'] = new OOUI\ButtonInputWidget( [
4362                         'name' => 'wpPreview',
4363                         'tabIndex' => ++$tabindex,
4364                         'id' => 'wpPreviewWidget',
4365                         'inputId' => 'wpPreview',
4366                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4367                         'useInputTag' => true,
4368                         'label' => $this->context->msg( 'showpreview' )->text(),
4369                         'infusable' => true,
4370                         'type' => 'submit',
4371                         // Message used: tooltip-preview
4372                         'title' => Linker::titleAttrib( 'preview' ),
4373                         // Message used: accesskey-preview
4374                         'accessKey' => Linker::accesskey( 'preview' ),
4375                 ] );
4376
4377                 $buttons['diff'] = new OOUI\ButtonInputWidget( [
4378                         'name' => 'wpDiff',
4379                         'tabIndex' => ++$tabindex,
4380                         'id' => 'wpDiffWidget',
4381                         'inputId' => 'wpDiff',
4382                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4383                         'useInputTag' => true,
4384                         'label' => $this->context->msg( 'showdiff' )->text(),
4385                         'infusable' => true,
4386                         'type' => 'submit',
4387                         // Message used: tooltip-diff
4388                         'title' => Linker::titleAttrib( 'diff' ),
4389                         // Message used: accesskey-diff
4390                         'accessKey' => Linker::accesskey( 'diff' ),
4391                 ] );
4392
4393                 // Avoid PHP 7.1 warning of passing $this by reference
4394                 $editPage = $this;
4395                 Hooks::run( 'EditPageBeforeEditButtons', [ &$editPage, &$buttons, &$tabindex ] );
4396
4397                 return $buttons;
4398         }
4399
4400         /**
4401          * Creates a basic error page which informs the user that
4402          * they have attempted to edit a nonexistent section.
4403          */
4404         public function noSuchSectionPage() {
4405                 $out = $this->context->getOutput();
4406                 $out->prepareErrorPage( $this->context->msg( 'nosuchsectiontitle' ) );
4407
4408                 $res = $this->context->msg( 'nosuchsectiontext', $this->section )->parseAsBlock();
4409
4410                 // Avoid PHP 7.1 warning of passing $this by reference
4411                 $editPage = $this;
4412                 Hooks::run( 'EditPageNoSuchSection', [ &$editPage, &$res ] );
4413                 $out->addHTML( $res );
4414
4415                 $out->returnToMain( false, $this->mTitle );
4416         }
4417
4418         /**
4419          * Show "your edit contains spam" page with your diff and text
4420          *
4421          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
4422          */
4423         public function spamPageWithContent( $match = false ) {
4424                 $this->textbox2 = $this->textbox1;
4425
4426                 if ( is_array( $match ) ) {
4427                         $match = $this->context->getLanguage()->listToText( $match );
4428                 }
4429                 $out = $this->context->getOutput();
4430                 $out->prepareErrorPage( $this->context->msg( 'spamprotectiontitle' ) );
4431
4432                 $out->addHTML( '<div id="spamprotected">' );
4433                 $out->addWikiMsg( 'spamprotectiontext' );
4434                 if ( $match ) {
4435                         $out->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
4436                 }
4437                 $out->addHTML( '</div>' );
4438
4439                 $out->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
4440                 $this->showDiff();
4441
4442                 $out->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
4443                 $this->showTextbox2();
4444
4445                 $out->addReturnTo( $this->getContextTitle(), [ 'action' => 'edit' ] );
4446         }
4447
4448         /**
4449          * Filter an input field through a Unicode de-armoring process if it
4450          * came from an old browser with known broken Unicode editing issues.
4451          *
4452          * @deprecated since 1.30, does nothing
4453          *
4454          * @param WebRequest $request
4455          * @param string $field
4456          * @return string
4457          */
4458         protected function safeUnicodeInput( $request, $field ) {
4459                 return rtrim( $request->getText( $field ) );
4460         }
4461
4462         /**
4463          * Filter an output field through a Unicode armoring process if it is
4464          * going to an old browser with known broken Unicode editing issues.
4465          *
4466          * @deprecated since 1.30, does nothing
4467          *
4468          * @param string $text
4469          * @return string
4470          */
4471         protected function safeUnicodeOutput( $text ) {
4472                 return $text;
4473         }
4474
4475         /**
4476          * @since 1.29
4477          */
4478         protected function addEditNotices() {
4479                 $out = $this->context->getOutput();
4480                 $editNotices = $this->mTitle->getEditNotices( $this->oldid );
4481                 if ( count( $editNotices ) ) {
4482                         $out->addHTML( implode( "\n", $editNotices ) );
4483                 } else {
4484                         $msg = $this->context->msg( 'editnotice-notext' );
4485                         if ( !$msg->isDisabled() ) {
4486                                 $out->addHTML(
4487                                         '<div class="mw-editnotice-notext">'
4488                                         . $msg->parseAsBlock()
4489                                         . '</div>'
4490                                 );
4491                         }
4492                 }
4493         }
4494
4495         /**
4496          * @since 1.29
4497          */
4498         protected function addTalkPageText() {
4499                 if ( $this->mTitle->isTalkPage() ) {
4500                         $this->context->getOutput()->addWikiMsg( 'talkpagetext' );
4501                 }
4502         }
4503
4504         /**
4505          * @since 1.29
4506          */
4507         protected function addLongPageWarningHeader() {
4508                 if ( $this->contentLength === false ) {
4509                         $this->contentLength = strlen( $this->textbox1 );
4510                 }
4511
4512                 $out = $this->context->getOutput();
4513                 $lang = $this->context->getLanguage();
4514                 $maxArticleSize = $this->context->getConfig()->get( 'MaxArticleSize' );
4515                 if ( $this->tooBig || $this->contentLength > $maxArticleSize * 1024 ) {
4516                         $out->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
4517                                 [
4518                                         'longpageerror',
4519                                         $lang->formatNum( round( $this->contentLength / 1024, 3 ) ),
4520                                         $lang->formatNum( $maxArticleSize )
4521                                 ]
4522                         );
4523                 } else {
4524                         if ( !$this->context->msg( 'longpage-hint' )->isDisabled() ) {
4525                                 $out->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
4526                                         [
4527                                                 'longpage-hint',
4528                                                 $lang->formatSize( strlen( $this->textbox1 ) ),
4529                                                 strlen( $this->textbox1 )
4530                                         ]
4531                                 );
4532                         }
4533                 }
4534         }
4535
4536         /**
4537          * @since 1.29
4538          */
4539         protected function addPageProtectionWarningHeaders() {
4540                 $out = $this->context->getOutput();
4541                 if ( $this->mTitle->isProtected( 'edit' ) &&
4542                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
4543                 ) {
4544                         # Is the title semi-protected?
4545                         if ( $this->mTitle->isSemiProtected() ) {
4546                                 $noticeMsg = 'semiprotectedpagewarning';
4547                         } else {
4548                                 # Then it must be protected based on static groups (regular)
4549                                 $noticeMsg = 'protectedpagewarning';
4550                         }
4551                         LogEventsList::showLogExtract( $out, 'protect', $this->mTitle, '',
4552                                 [ 'lim' => 1, 'msgKey' => [ $noticeMsg ] ] );
4553                 }
4554                 if ( $this->mTitle->isCascadeProtected() ) {
4555                         # Is this page under cascading protection from some source pages?
4556                         /** @var Title[] $cascadeSources */
4557                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
4558                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
4559                         $cascadeSourcesCount = count( $cascadeSources );
4560                         if ( $cascadeSourcesCount > 0 ) {
4561                                 # Explain, and list the titles responsible
4562                                 foreach ( $cascadeSources as $page ) {
4563                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
4564                                 }
4565                         }
4566                         $notice .= '</div>';
4567                         $out->wrapWikiMsg( $notice, [ 'cascadeprotectedwarning', $cascadeSourcesCount ] );
4568                 }
4569                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
4570                         LogEventsList::showLogExtract( $out, 'protect', $this->mTitle, '',
4571                                 [ 'lim' => 1,
4572                                         'showIfEmpty' => false,
4573                                         'msgKey' => [ 'titleprotectedwarning' ],
4574                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ] );
4575                 }
4576         }
4577
4578         /**
4579          * @param OutputPage $out
4580          * @since 1.29
4581          */
4582         protected function addExplainConflictHeader( OutputPage $out ) {
4583                 $out->addHTML(
4584                         $this->getEditConflictHelper()->getExplainHeader()
4585                 );
4586         }
4587
4588         /**
4589          * @param string $name
4590          * @param mixed[] $customAttribs
4591          * @param User $user
4592          * @return mixed[]
4593          * @since 1.29
4594          */
4595         protected function buildTextboxAttribs( $name, array $customAttribs, User $user ) {
4596                 return ( new TextboxBuilder() )->buildTextboxAttribs(
4597                         $name, $customAttribs, $user, $this->mTitle
4598                 );
4599         }
4600
4601         /**
4602          * @param string $wikitext
4603          * @return string
4604          * @since 1.29
4605          */
4606         protected function addNewLineAtEnd( $wikitext ) {
4607                 return ( new TextboxBuilder() )->addNewLineAtEnd( $wikitext );
4608         }
4609
4610         /**
4611          * Turns section name wikitext into anchors for use in HTTP redirects. Various
4612          * versions of Microsoft browsers misinterpret fragment encoding of Location: headers
4613          * resulting in mojibake in address bar. Redirect them to legacy section IDs,
4614          * if possible. All the other browsers get HTML5 if the wiki is configured for it, to
4615          * spread the new style links more efficiently.
4616          *
4617          * @param string $text
4618          * @return string
4619          */
4620         private function guessSectionName( $text ) {
4621                 global $wgParser;
4622
4623                 // Detect Microsoft browsers
4624                 $userAgent = $this->context->getRequest()->getHeader( 'User-Agent' );
4625                 if ( $userAgent && preg_match( '/MSIE|Edge/', $userAgent ) ) {
4626                         // ...and redirect them to legacy encoding, if available
4627                         return $wgParser->guessLegacySectionNameFromWikiText( $text );
4628                 }
4629                 // Meanwhile, real browsers get real anchors
4630                 return $wgParser->guessSectionNameFromWikiText( $text );
4631         }
4632
4633         /**
4634          * Set a factory function to create an EditConflictHelper
4635          *
4636          * @param callable $factory Factory function
4637          * @since 1.31
4638          */
4639         public function setEditConflictHelperFactory( callable $factory ) {
4640                 $this->editConflictHelperFactory = $factory;
4641                 $this->editConflictHelper = null;
4642         }
4643
4644         /**
4645          * @return TextConflictHelper
4646          */
4647         private function getEditConflictHelper() {
4648                 if ( !$this->editConflictHelper ) {
4649                         $this->editConflictHelper = call_user_func(
4650                                 $this->editConflictHelperFactory,
4651                                 $this->getSubmitButtonLabel()
4652                         );
4653                 }
4654
4655                 return $this->editConflictHelper;
4656         }
4657
4658         /**
4659          * @param string $submitButtonLabel
4660          * @return TextConflictHelper
4661          */
4662         private function newTextConflictHelper( $submitButtonLabel ) {
4663                 return new TextConflictHelper(
4664                         $this->getTitle(),
4665                         $this->getContext()->getOutput(),
4666                         MediaWikiServices::getInstance()->getStatsdDataFactory(),
4667                         $submitButtonLabel
4668                 );
4669         }
4670 }