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