includes/EditPage.php

   1 <?php
   2 /**
   3  * User interface for page editing.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 use MediaWiki\Logger\LoggerFactory;
  24 use MediaWiki\MediaWikiServices;
  25 use Wikimedia\ScopedCallback;
  26
  27 /**
  28  * The edit page/HTML interface (split from Article)
  29  * The actual database and text munging is still in Article,
  30  * but it should get easier to call those from alternate
  31  * interfaces.
  32  *
  33  * EditPage cares about two distinct titles:
  34  * $this->mContextTitle is the page that forms submit to, links point to,
  35  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  36  * page in the database that is actually being edited. These are
  37  * usually the same, but they are now allowed to be different.
  38  *
  39  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  40  * headaches, which may be fatal.
  41  */
  42 class EditPage {
  43         /**
  44          * Status: Article successfully updated
  45          */
  46         const AS_SUCCESS_UPDATE = 200;
  47
  48         /**
  49          * Status: Article successfully created
  50          */
  51         const AS_SUCCESS_NEW_ARTICLE = 201;
  52
  53         /**
  54          * Status: Article update aborted by a hook function
  55          */
  56         const AS_HOOK_ERROR = 210;
  57
  58         /**
  59          * Status: A hook function returned an error
  60          */
  61         const AS_HOOK_ERROR_EXPECTED = 212;
  62
  63         /**
  64          * Status: User is blocked from editing this page
  65          */
  66         const AS_BLOCKED_PAGE_FOR_USER = 215;
  67
  68         /**
  69          * Status: Content too big (> $wgMaxArticleSize)
  70          */
  71         const AS_CONTENT_TOO_BIG = 216;
  72
  73         /**
  74          * Status: this anonymous user is not allowed to edit this page
  75          */
  76         const AS_READ_ONLY_PAGE_ANON = 218;
  77
  78         /**
  79          * Status: this logged in user is not allowed to edit this page
  80          */
  81         const AS_READ_ONLY_PAGE_LOGGED = 219;
  82
  83         /**
  84          * Status: wiki is in readonly mode (wfReadOnly() == true)
  85          */
  86         const AS_READ_ONLY_PAGE = 220;
  87
  88         /**
  89          * Status: rate limiter for action 'edit' was tripped
  90          */
  91         const AS_RATE_LIMITED = 221;
  92
  93         /**
  94          * Status: article was deleted while editing and param wpRecreate == false or form
  95          * was not posted
  96          */
  97         const AS_ARTICLE_WAS_DELETED = 222;
  98
  99         /**
 100          * Status: user tried to create this page, but is not allowed to do that
 101          * ( Title->userCan('create') == false )
 102          */
 103         const AS_NO_CREATE_PERMISSION = 223;
 104
 105         /**
 106          * Status: user tried to create a blank page and wpIgnoreBlankArticle == false
 107          */
 108         const AS_BLANK_ARTICLE = 224;
 109
 110         /**
 111          * Status: (non-resolvable) edit conflict
 112          */
 113         const AS_CONFLICT_DETECTED = 225;
 114
 115         /**
 116          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 117          * editing in his own userspace or talkspace and wpIgnoreBlankSummary == false
 118          */
 119         const AS_SUMMARY_NEEDED = 226;
 120
 121         /**
 122          * Status: user tried to create a new section without content
 123          */
 124         const AS_TEXTBOX_EMPTY = 228;
 125
 126         /**
 127          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 128          */
 129         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 130
 131         /**
 132          * Status: WikiPage::doEdit() was unsuccessful
 133          */
 134         const AS_END = 231;
 135
 136         /**
 137          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 138          */
 139         const AS_SPAM_ERROR = 232;
 140
 141         /**
 142          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 143          */
 144         const AS_IMAGE_REDIRECT_ANON = 233;
 145
 146         /**
 147          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 148          */
 149         const AS_IMAGE_REDIRECT_LOGGED = 234;
 150
 151         /**
 152          * Status: user tried to modify the content model, but is not allowed to do that
 153          * ( User::isAllowed('editcontentmodel') == false )
 154          */
 155         const AS_NO_CHANGE_CONTENT_MODEL = 235;
 156
 157         /**
 158          * Status: user tried to create self-redirect (redirect to the same article) and
 159          * wpIgnoreSelfRedirect == false
 160          */
 161         const AS_SELF_REDIRECT = 236;
 162
 163         /**
 164          * Status: an error relating to change tagging. Look at the message key for
 165          * more details
 166          */
 167         const AS_CHANGE_TAG_ERROR = 237;
 168
 169         /**
 170          * Status: can't parse content
 171          */
 172         const AS_PARSE_ERROR = 240;
 173
 174         /**
 175          * Status: when changing the content model is disallowed due to
 176          * $wgContentHandlerUseDB being false
 177          */
 178         const AS_CANNOT_USE_CUSTOM_MODEL = 241;
 179
 180         /**
 181          * HTML id and name for the beginning of the edit form.
 182          */
 183         const EDITFORM_ID = 'editform';
 184
 185         /**
 186          * Prefix of key for cookie used to pass post-edit state.
 187          * The revision id edited is added after this
 188          */
 189         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 190
 191         /**
 192          * Duration of PostEdit cookie, in seconds.
 193          * The cookie will be removed instantly if the JavaScript runs.
 194          *
 195          * Otherwise, though, we don't want the cookies to accumulate.
 196          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible
 197          * limit of only 20 cookies per domain. This still applies at least to some
 198          * versions of IE without full updates:
 199          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 200          *
 201          * A value of 20 minutes should be enough to take into account slow loads and minor
 202          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 203          */
 204         const POST_EDIT_COOKIE_DURATION = 1200;
 205
 206         /** @var Article */
 207         public $mArticle;
 208         /** @var WikiPage */
 209         private $page;
 210
 211         /** @var Title */
 212         public $mTitle;
 213
 214         /** @var null|Title */
 215         private $mContextTitle = null;
 216
 217         /** @var string */
 218         public $action = 'submit';
 219
 220         /** @var bool */
 221         public $isConflict = false;
 222
 223         /** @var bool */
 224         public $isCssJsSubpage = false;
 225
 226         /** @var bool */
 227         public $isCssSubpage = false;
 228
 229         /** @var bool */
 230         public $isJsSubpage = false;
 231
 232         /** @var bool */
 233         public $isWrongCaseCssJsPage = false;
 234
 235         /** @var bool New page or new section */
 236         public $isNew = false;
 237
 238         /** @var bool */
 239         public $deletedSinceEdit;
 240
 241         /** @var string */
 242         public $formtype;
 243
 244         /** @var bool */
 245         public $firsttime;
 246
 247         /** @var bool|stdClass */
 248         public $lastDelete;
 249
 250         /** @var bool */
 251         public $mTokenOk = false;
 252
 253         /** @var bool */
 254         public $mTokenOkExceptSuffix = false;
 255
 256         /** @var bool */
 257         public $mTriedSave = false;
 258
 259         /** @var bool */
 260         public $incompleteForm = false;
 261
 262         /** @var bool */
 263         public $tooBig = false;
 264
 265         /** @var bool */
 266         public $missingComment = false;
 267
 268         /** @var bool */
 269         public $missingSummary = false;
 270
 271         /** @var bool */
 272         public $allowBlankSummary = false;
 273
 274         /** @var bool */
 275         protected $blankArticle = false;
 276
 277         /** @var bool */
 278         protected $allowBlankArticle = false;
 279
 280         /** @var bool */
 281         protected $selfRedirect = false;
 282
 283         /** @var bool */
 284         protected $allowSelfRedirect = false;
 285
 286         /** @var string */
 287         public $autoSumm = '';
 288
 289         /** @var string */
 290         public $hookError = '';
 291
 292         /** @var ParserOutput */
 293         public $mParserOutput;
 294
 295         /** @var bool Has a summary been preset using GET parameter &summary= ? */
 296         public $hasPresetSummary = false;
 297
 298         /** @var Revision|bool */
 299         public $mBaseRevision = false;
 300
 301         /** @var bool */
 302         public $mShowSummaryField = true;
 303
 304         # Form values
 305
 306         /** @var bool */
 307         public $save = false;
 308
 309         /** @var bool */
 310         public $preview = false;
 311
 312         /** @var bool */
 313         public $diff = false;
 314
 315         /** @var bool */
 316         public $minoredit = false;
 317
 318         /** @var bool */
 319         public $watchthis = false;
 320
 321         /** @var bool */
 322         public $recreate = false;
 323
 324         /** @var string */
 325         public $textbox1 = '';
 326
 327         /** @var string */
 328         public $textbox2 = '';
 329
 330         /** @var string */
 331         public $summary = '';
 332
 333         /** @var bool */
 334         public $nosummary = false;
 335
 336         /** @var string */
 337         public $edittime = '';
 338
 339         /** @var integer */
 340         private $editRevId = null;
 341
 342         /** @var string */
 343         public $section = '';
 344
 345         /** @var string */
 346         public $sectiontitle = '';
 347
 348         /** @var string */
 349         public $starttime = '';
 350
 351         /** @var int */
 352         public $oldid = 0;
 353
 354         /** @var int */
 355         public $parentRevId = 0;
 356
 357         /** @var string */
 358         public $editintro = '';
 359
 360         /** @var null */
 361         public $scrolltop = null;
 362
 363         /** @var bool */
 364         public $bot = true;
 365
 366         /** @var string */
 367         public $contentModel;
 368
 369         /** @var null|string */
 370         public $contentFormat = null;
 371
 372         /** @var null|array */
 373         private $changeTags = null;
 374
 375         # Placeholders for text injection by hooks (must be HTML)
 376         # extensions should take care to _append_ to the present value
 377
 378         /** @var string Before even the preview */
 379         public $editFormPageTop = '';
 380         public $editFormTextTop = '';
 381         public $editFormTextBeforeContent = '';
 382         public $editFormTextAfterWarn = '';
 383         public $editFormTextAfterTools = '';
 384         public $editFormTextBottom = '';
 385         public $editFormTextAfterContent = '';
 386         public $previewTextAfterContent = '';
 387         public $mPreloadContent = null;
 388
 389         /* $didSave should be set to true whenever an article was successfully altered. */
 390         public $didSave = false;
 391         public $undidRev = 0;
 392
 393         public $suppressIntro = false;
 394
 395         /** @var bool */
 396         protected $edit;
 397
 398         /** @var bool|int */
 399         protected $contentLength = false;
 400
 401         /**
 402          * @var bool Set in ApiEditPage, based on ContentHandler::allowsDirectApiEditing
 403          */
 404         private $enableApiEditOverride = false;
 405
 406         /**
 407          * @var IContextSource
 408          */
 409         protected $context;
 410
 411         /**
 412          * @var bool Whether an old revision is edited
 413          */
 414         private $isOldRev = false;
 415
 416         /**
 417          * @var bool Whether OOUI should be enabled here
 418          */
 419         private $oouiEnabled = false;
 420
 421         /**
 422          * @param Article $article
 423          */
 424         public function __construct( Article $article ) {
 425                 global $wgOOUIEditPage;
 426
 427                 $this->mArticle = $article;
 428                 $this->page = $article->getPage(); // model object
 429                 $this->mTitle = $article->getTitle();
 430                 $this->context = $article->getContext();
 431
 432                 $this->contentModel = $this->mTitle->getContentModel();
 433
 434                 $handler = ContentHandler::getForModelID( $this->contentModel );
 435                 $this->contentFormat = $handler->getDefaultFormat();
 436
 437                 $this->oouiEnabled = $wgOOUIEditPage;
 438         }
 439
 440         /**
 441          * @return Article
 442          */
 443         public function getArticle() {
 444                 return $this->mArticle;
 445         }
 446
 447         /**
 448          * @since 1.28
 449          * @return IContextSource
 450          */
 451         public function getContext() {
 452                 return $this->context;
 453         }
 454
 455         /**
 456          * @since 1.19
 457          * @return Title
 458          */
 459         public function getTitle() {
 460                 return $this->mTitle;
 461         }
 462
 463         /**
 464          * Set the context Title object
 465          *
 466          * @param Title|null $title Title object or null
 467          */
 468         public function setContextTitle( $title ) {
 469                 $this->mContextTitle = $title;
 470         }
 471
 472         /**
 473          * Get the context title object.
 474          * If not set, $wgTitle will be returned. This behavior might change in
 475          * the future to return $this->mTitle instead.
 476          *
 477          * @return Title
 478          */
 479         public function getContextTitle() {
 480                 if ( is_null( $this->mContextTitle ) ) {
 481                         global $wgTitle;
 482                         return $wgTitle;
 483                 } else {
 484                         return $this->mContextTitle;
 485                 }
 486         }
 487
 488         /**
 489          * Check if the edit page is using OOUI controls
 490          * @return bool
 491          */
 492         public function isOouiEnabled() {
 493                 return $this->oouiEnabled;
 494         }
 495
 496         /**
 497          * Returns if the given content model is editable.
 498          *
 499          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 500          * @return bool
 501          * @throws MWException If $modelId has no known handler
 502          */
 503         public function isSupportedContentModel( $modelId ) {
 504                 return $this->enableApiEditOverride === true ||
 505                         ContentHandler::getForModelID( $modelId )->supportsDirectEditing();
 506         }
 507
 508         /**
 509          * Allow editing of content that supports API direct editing, but not general
 510          * direct editing. Set to false by default.
 511          *
 512          * @param bool $enableOverride
 513          */
 514         public function setApiEditOverride( $enableOverride ) {
 515                 $this->enableApiEditOverride = $enableOverride;
 516         }
 517
 518         /**
 519          * @deprecated since 1.29, call edit directly
 520          */
 521         public function submit() {
 522                 $this->edit();
 523         }
 524
 525         /**
 526          * This is the function that gets called for "action=edit". It
 527          * sets up various member variables, then passes execution to
 528          * another function, usually showEditForm()
 529          *
 530          * The edit form is self-submitting, so that when things like
 531          * preview and edit conflicts occur, we get the same form back
 532          * with the extra stuff added.  Only when the final submission
 533          * is made and all is well do we actually save and redirect to
 534          * the newly-edited page.
 535          */
 536         public function edit() {
 537                 global $wgOut, $wgRequest, $wgUser;
 538                 // Allow extensions to modify/prevent this form or submission
 539                 if ( !Hooks::run( 'AlternateEdit', [ $this ] ) ) {
 540                         return;
 541                 }
 542
 543                 wfDebug( __METHOD__ . ": enter\n" );
 544
 545                 // If they used redlink=1 and the page exists, redirect to the main article
 546                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 547                         $wgOut->redirect( $this->mTitle->getFullURL() );
 548                         return;
 549                 }
 550
 551                 $this->importFormData( $wgRequest );
 552                 $this->firsttime = false;
 553
 554                 if ( wfReadOnly() && $this->save ) {
 555                         // Force preview
 556                         $this->save = false;
 557                         $this->preview = true;
 558                 }
 559
 560                 if ( $this->save ) {
 561                         $this->formtype = 'save';
 562                 } elseif ( $this->preview ) {
 563                         $this->formtype = 'preview';
 564                 } elseif ( $this->diff ) {
 565                         $this->formtype = 'diff';
 566                 } else { # First time through
 567                         $this->firsttime = true;
 568                         if ( $this->previewOnOpen() ) {
 569                                 $this->formtype = 'preview';
 570                         } else {
 571                                 $this->formtype = 'initial';
 572                         }
 573                 }
 574
 575                 $permErrors = $this->getEditPermissionErrors( $this->save ? 'secure' : 'full' );
 576                 if ( $permErrors ) {
 577                         wfDebug( __METHOD__ . ": User can't edit\n" );
 578                         // Auto-block user's IP if the account was "hard" blocked
 579                         if ( !wfReadOnly() ) {
 580                                 $user = $wgUser;
 581                                 DeferredUpdates::addCallableUpdate( function () use ( $user ) {
 582                                         $user->spreadAnyEditBlock();
 583                                 } );
 584                         }
 585                         $this->displayPermissionsError( $permErrors );
 586
 587                         return;
 588                 }
 589
 590                 $revision = $this->mArticle->getRevisionFetched();
 591                 // Disallow editing revisions with content models different from the current one
 592                 // Undo edits being an exception in order to allow reverting content model changes.
 593                 if ( $revision
 594                         && $revision->getContentModel() !== $this->contentModel
 595                 ) {
 596                         $prevRev = null;
 597                         if ( $this->undidRev ) {
 598                                 $undidRevObj = Revision::newFromId( $this->undidRev );
 599                                 $prevRev = $undidRevObj ? $undidRevObj->getPrevious() : null;
 600                         }
 601                         if ( !$this->undidRev
 602                                 || !$prevRev
 603                                 || $prevRev->getContentModel() !== $this->contentModel
 604                         ) {
 605                                 $this->displayViewSourcePage(
 606                                         $this->getContentObject(),
 607                                         $this->context->msg(
 608                                                 'contentmodelediterror',
 609                                                 $revision->getContentModel(),
 610                                                 $this->contentModel
 611                                         )->plain()
 612                                 );
 613                                 return;
 614                         }
 615                 }
 616
 617                 $this->isConflict = false;
 618                 // css / js subpages of user pages get a special treatment
 619                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 620                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 621                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 622                 // @todo FIXME: Silly assignment.
 623                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 624
 625                 # Show applicable editing introductions
 626                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 627                         $this->showIntro();
 628                 }
 629
 630                 # Attempt submission here.  This will check for edit conflicts,
 631                 # and redundantly check for locked database, blocked IPs, etc.
 632                 # that edit() already checked just in case someone tries to sneak
 633                 # in the back door with a hand-edited submission URL.
 634
 635                 if ( 'save' == $this->formtype ) {
 636                         $resultDetails = null;
 637                         $status = $this->attemptSave( $resultDetails );
 638                         if ( !$this->handleStatus( $status, $resultDetails ) ) {
 639                                 return;
 640                         }
 641                 }
 642
 643                 # First time through: get contents, set time for conflict
 644                 # checking, etc.
 645                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 646                         if ( $this->initialiseForm() === false ) {
 647                                 $this->noSuchSectionPage();
 648                                 return;
 649                         }
 650
 651                         if ( !$this->mTitle->getArticleID() ) {
 652                                 Hooks::run( 'EditFormPreloadText', [ &$this->textbox1, &$this->mTitle ] );
 653                         } else {
 654                                 Hooks::run( 'EditFormInitialText', [ $this ] );
 655                         }
 656
 657                 }
 658
 659                 $this->showEditForm();
 660         }
 661
 662         /**
 663          * @param string $rigor Same format as Title::getUserPermissionErrors()
 664          * @return array
 665          */
 666         protected function getEditPermissionErrors( $rigor = 'secure' ) {
 667                 global $wgUser;
 668
 669                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser, $rigor );
 670                 # Can this title be created?
 671                 if ( !$this->mTitle->exists() ) {
 672                         $permErrors = array_merge(
 673                                 $permErrors,
 674                                 wfArrayDiff2(
 675                                         $this->mTitle->getUserPermissionsErrors( 'create', $wgUser, $rigor ),
 676                                         $permErrors
 677                                 )
 678                         );
 679                 }
 680                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 681                 $remove = [];
 682                 foreach ( $permErrors as $error ) {
 683                         if ( ( $this->preview || $this->diff )
 684                                 && (
 685                                         $error[0] == 'blockedtext' ||
 686                                         $error[0] == 'autoblockedtext' ||
 687                                         $error[0] == 'systemblockedtext'
 688                                 )
 689                         ) {
 690                                 $remove[] = $error;
 691                         }
 692                 }
 693                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 694
 695                 return $permErrors;
 696         }
 697
 698         /**
 699          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 700          * but with the following differences:
 701          * - If redlink=1, the user will be redirected to the page
 702          * - If there is content to display or the error occurs while either saving,
 703          *   previewing or showing the difference, it will be a
 704          *   "View source for ..." page displaying the source code after the error message.
 705          *
 706          * @since 1.19
 707          * @param array $permErrors Array of permissions errors, as returned by
 708          *    Title::getUserPermissionsErrors().
 709          * @throws PermissionsError
 710          */
 711         protected function displayPermissionsError( array $permErrors ) {
 712                 global $wgRequest, $wgOut;
 713
 714                 if ( $wgRequest->getBool( 'redlink' ) ) {
 715                         // The edit page was reached via a red link.
 716                         // Redirect to the article page and let them click the edit tab if
 717                         // they really want a permission error.
 718                         $wgOut->redirect( $this->mTitle->getFullURL() );
 719                         return;
 720                 }
 721
 722                 $content = $this->getContentObject();
 723
 724                 # Use the normal message if there's nothing to display
 725                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 726                         $action = $this->mTitle->exists() ? 'edit' :
 727                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 728                         throw new PermissionsError( $action, $permErrors );
 729                 }
 730
 731                 $this->displayViewSourcePage(
 732                         $content,
 733                         $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' )
 734                 );
 735         }
 736
 737         /**
 738          * Display a read-only View Source page
 739          * @param Content $content content object
 740          * @param string $errorMessage additional wikitext error message to display
 741          */
 742         protected function displayViewSourcePage( Content $content, $errorMessage = '' ) {
 743                 global $wgOut;
 744
 745                 Hooks::run( 'EditPage::showReadOnlyForm:initial', [ $this, &$wgOut ] );
 746
 747                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 748                 $wgOut->setPageTitle( $this->context->msg(
 749                         'viewsource-title',
 750                         $this->getContextTitle()->getPrefixedText()
 751                 ) );
 752                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 753                 $wgOut->addHTML( $this->editFormPageTop );
 754                 $wgOut->addHTML( $this->editFormTextTop );
 755
 756                 if ( $errorMessage !== '' ) {
 757                         $wgOut->addWikiText( $errorMessage );
 758                         $wgOut->addHTML( "<hr />\n" );
 759                 }
 760
 761                 # If the user made changes, preserve them when showing the markup
 762                 # (This happens when a user is blocked during edit, for instance)
 763                 if ( !$this->firsttime ) {
 764                         $text = $this->textbox1;
 765                         $wgOut->addWikiMsg( 'viewyourtext' );
 766                 } else {
 767                         try {
 768                                 $text = $this->toEditText( $content );
 769                         } catch ( MWException $e ) {
 770                                 # Serialize using the default format if the content model is not supported
 771                                 # (e.g. for an old revision with a different model)
 772                                 $text = $content->serialize();
 773                         }
 774                         $wgOut->addWikiMsg( 'viewsourcetext' );
 775                 }
 776
 777                 $wgOut->addHTML( $this->editFormTextBeforeContent );
 778                 $this->showTextbox( $text, 'wpTextbox1', [ 'readonly' ] );
 779                 $wgOut->addHTML( $this->editFormTextAfterContent );
 780
 781                 $wgOut->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
 782
 783                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 784
 785                 $wgOut->addHTML( $this->editFormTextBottom );
 786                 if ( $this->mTitle->exists() ) {
 787                         $wgOut->returnToMain( null, $this->mTitle );
 788                 }
 789         }
 790
 791         /**
 792          * Should we show a preview when the edit form is first shown?
 793          *
 794          * @return bool
 795          */
 796         protected function previewOnOpen() {
 797                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 798                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 799                         // Explicit override from request
 800                         return true;
 801                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 802                         // Explicit override from request
 803                         return false;
 804                 } elseif ( $this->section == 'new' ) {
 805                         // Nothing *to* preview for new sections
 806                         return false;
 807                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 808                         && $wgUser->getOption( 'previewonfirst' )
 809                 ) {
 810                         // Standard preference behavior
 811                         return true;
 812                 } elseif ( !$this->mTitle->exists()
 813                         && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 814                         && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
 815                 ) {
 816                         // Categories are special
 817                         return true;
 818                 } else {
 819                         return false;
 820                 }
 821         }
 822
 823         /**
 824          * Checks whether the user entered a skin name in uppercase,
 825          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 826          *
 827          * @return bool
 828          */
 829         protected function isWrongCaseCssJsPage() {
 830                 if ( $this->mTitle->isCssJsSubpage() ) {
 831                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 832                         $skins = array_merge(
 833                                 array_keys( Skin::getSkinNames() ),
 834                                 [ 'common' ]
 835                         );
 836                         return !in_array( $name, $skins )
 837                                 && in_array( strtolower( $name ), $skins );
 838                 } else {
 839                         return false;
 840                 }
 841         }
 842
 843         /**
 844          * Returns whether section editing is supported for the current page.
 845          * Subclasses may override this to replace the default behavior, which is
 846          * to check ContentHandler::supportsSections.
 847          *
 848          * @return bool True if this edit page supports sections, false otherwise.
 849          */
 850         protected function isSectionEditSupported() {
 851                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 852                 return $contentHandler->supportsSections();
 853         }
 854
 855         /**
 856          * This function collects the form data and uses it to populate various member variables.
 857          * @param WebRequest $request
 858          * @throws ErrorPageError
 859          */
 860         public function importFormData( &$request ) {
 861                 global $wgContLang, $wgUser;
 862
 863                 # Allow users to change the mode for testing
 864                 $this->oouiEnabled = $request->getFuzzyBool( 'ooui', $this->oouiEnabled );
 865
 866                 # Section edit can come from either the form or a link
 867                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 868
 869                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 870                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 871                 }
 872
 873                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 874
 875                 if ( $request->wasPosted() ) {
 876                         # These fields need to be checked for encoding.
 877                         # Also remove trailing whitespace, but don't remove _initial_
 878                         # whitespace from the text boxes. This may be significant formatting.
 879                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 880                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 881                                 // Skip this if wpTextbox2 has input, it indicates that we came
 882                                 // from a conflict page with raw page text, not a custom form
 883                                 // modified by subclasses
 884                                 $textbox1 = $this->importContentFormData( $request );
 885                                 if ( $textbox1 !== null ) {
 886                                         $this->textbox1 = $textbox1;
 887                                 }
 888                         }
 889
 890                         # Truncate for whole multibyte characters
 891                         $this->summary = $wgContLang->truncate( $request->getText( 'wpSummary' ), 255 );
 892
 893                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 894                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 895                         # section titles.
 896                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 897
 898                         # Treat sectiontitle the same way as summary.
 899                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 900                         # currently doing double duty as both edit summary and section title. Right now this
 901                         # is just to allow API edits to work around this limitation, but this should be
 902                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 903                         $this->sectiontitle = $wgContLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 904                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 905
 906                         $this->edittime = $request->getVal( 'wpEdittime' );
 907                         $this->editRevId = $request->getIntOrNull( 'editRevId' );
 908                         $this->starttime = $request->getVal( 'wpStarttime' );
 909
 910                         $undidRev = $request->getInt( 'wpUndidRevision' );
 911                         if ( $undidRev ) {
 912                                 $this->undidRev = $undidRev;
 913                         }
 914
 915                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 916
 917                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 918                                 // wpTextbox1 field is missing, possibly due to being "too big"
 919                                 // according to some filter rules such as Suhosin's setting for
 920                                 // suhosin.request.max_value_length (d'oh)
 921                                 $this->incompleteForm = true;
 922                         } else {
 923                                 // If we receive the last parameter of the request, we can fairly
 924                                 // claim the POST request has not been truncated.
 925
 926                                 // TODO: softened the check for cutover.  Once we determine
 927                                 // that it is safe, we should complete the transition by
 928                                 // removing the "edittime" clause.
 929                                 $this->incompleteForm = ( !$request->getVal( 'wpUltimateParam' )
 930                                         && is_null( $this->edittime ) );
 931                         }
 932                         if ( $this->incompleteForm ) {
 933                                 # If the form is incomplete, force to preview.
 934                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 935                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 936                                 $this->preview = true;
 937                         } else {
 938                                 $this->preview = $request->getCheck( 'wpPreview' );
 939                                 $this->diff = $request->getCheck( 'wpDiff' );
 940
 941                                 // Remember whether a save was requested, so we can indicate
 942                                 // if we forced preview due to session failure.
 943                                 $this->mTriedSave = !$this->preview;
 944
 945                                 if ( $this->tokenOk( $request ) ) {
 946                                         # Some browsers will not report any submit button
 947                                         # if the user hits enter in the comment box.
 948                                         # The unmarked state will be assumed to be a save,
 949                                         # if the form seems otherwise complete.
 950                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 951                                 } elseif ( $this->diff ) {
 952                                         # Failed token check, but only requested "Show Changes".
 953                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 954                                 } else {
 955                                         # Page might be a hack attempt posted from
 956                                         # an external site. Preview instead of saving.
 957                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 958                                         $this->preview = true;
 959                                 }
 960                         }
 961                         $this->save = !$this->preview && !$this->diff;
 962                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 963                                 $this->edittime = null;
 964                         }
 965
 966                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 967                                 $this->starttime = null;
 968                         }
 969
 970                         $this->recreate = $request->getCheck( 'wpRecreate' );
 971
 972                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 973                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 974
 975                         # Don't force edit summaries when a user is editing their own user or talk page
 976                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 977                                 && $this->mTitle->getText() == $wgUser->getName()
 978                         ) {
 979                                 $this->allowBlankSummary = true;
 980                         } else {
 981                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
 982                                         || !$wgUser->getOption( 'forceeditsummary' );
 983                         }
 984
 985                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 986
 987                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
 988                         $this->allowSelfRedirect = $request->getBool( 'wpIgnoreSelfRedirect' );
 989
 990                         $changeTags = $request->getVal( 'wpChangeTags' );
 991                         if ( is_null( $changeTags ) || $changeTags === '' ) {
 992                                 $this->changeTags = [];
 993                         } else {
 994                                 $this->changeTags = array_filter( array_map( 'trim', explode( ',',
 995                                         $changeTags ) ) );
 996                         }
 997                 } else {
 998                         # Not a posted form? Start with nothing.
 999                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
1000                         $this->textbox1 = '';
1001                         $this->summary = '';
1002                         $this->sectiontitle = '';
1003                         $this->edittime = '';
1004                         $this->editRevId = null;
1005                         $this->starttime = wfTimestampNow();
1006                         $this->edit = false;
1007                         $this->preview = false;
1008                         $this->save = false;
1009                         $this->diff = false;
1010                         $this->minoredit = false;
1011                         // Watch may be overridden by request parameters
1012                         $this->watchthis = $request->getBool( 'watchthis', false );
1013                         $this->recreate = false;
1014
1015                         // When creating a new section, we can preload a section title by passing it as the
1016                         // preloadtitle parameter in the URL (T15100)
1017                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
1018                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
1019                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
1020                                 $this->summary = $request->getVal( 'preloadtitle' );
1021                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
1022                                 $this->summary = $request->getText( 'summary' );
1023                                 if ( $this->summary !== '' ) {
1024                                         $this->hasPresetSummary = true;
1025                                 }
1026                         }
1027
1028                         if ( $request->getVal( 'minor' ) ) {
1029                                 $this->minoredit = true;
1030                         }
1031                 }
1032
1033                 $this->oldid = $request->getInt( 'oldid' );
1034                 $this->parentRevId = $request->getInt( 'parentRevId' );
1035
1036                 $this->bot = $request->getBool( 'bot', true );
1037                 $this->nosummary = $request->getBool( 'nosummary' );
1038
1039                 // May be overridden by revision.
1040                 $this->contentModel = $request->getText( 'model', $this->contentModel );
1041                 // May be overridden by revision.
1042                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
1043
1044                 try {
1045                         $handler = ContentHandler::getForModelID( $this->contentModel );
1046                 } catch ( MWUnknownContentModelException $e ) {
1047                         throw new ErrorPageError(
1048                                 'editpage-invalidcontentmodel-title',
1049                                 'editpage-invalidcontentmodel-text',
1050                                 [ wfEscapeWikiText( $this->contentModel ) ]
1051                         );
1052                 }
1053
1054                 if ( !$handler->isSupportedFormat( $this->contentFormat ) ) {
1055                         throw new ErrorPageError(
1056                                 'editpage-notsupportedcontentformat-title',
1057                                 'editpage-notsupportedcontentformat-text',
1058                                 [
1059                                         wfEscapeWikiText( $this->contentFormat ),
1060                                         wfEscapeWikiText( ContentHandler::getLocalizedName( $this->contentModel ) )
1061                                 ]
1062                         );
1063                 }
1064
1065                 /**
1066                  * @todo Check if the desired model is allowed in this namespace, and if
1067                  *   a transition from the page's current model to the new model is
1068                  *   allowed.
1069                  */
1070
1071                 $this->editintro = $request->getText( 'editintro',
1072                         // Custom edit intro for new sections
1073                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
1074
1075                 // Allow extensions to modify form data
1076                 Hooks::run( 'EditPage::importFormData', [ $this, $request ] );
1077         }
1078
1079         /**
1080          * Subpage overridable method for extracting the page content data from the
1081          * posted form to be placed in $this->textbox1, if using customized input
1082          * this method should be overridden and return the page text that will be used
1083          * for saving, preview parsing and so on...
1084          *
1085          * @param WebRequest $request
1086          * @return string|null
1087          */
1088         protected function importContentFormData( &$request ) {
1089                 return; // Don't do anything, EditPage already extracted wpTextbox1
1090         }
1091
1092         /**
1093          * Initialise form fields in the object
1094          * Called on the first invocation, e.g. when a user clicks an edit link
1095          * @return bool If the requested section is valid
1096          */
1097         public function initialiseForm() {
1098                 global $wgUser;
1099                 $this->edittime = $this->page->getTimestamp();
1100                 $this->editRevId = $this->page->getLatest();
1101
1102                 $content = $this->getContentObject( false ); # TODO: track content object?!
1103                 if ( $content === false ) {
1104                         return false;
1105                 }
1106                 $this->textbox1 = $this->toEditText( $content );
1107
1108                 // activate checkboxes if user wants them to be always active
1109                 # Sort out the "watch" checkbox
1110                 if ( $wgUser->getOption( 'watchdefault' ) ) {
1111                         # Watch all edits
1112                         $this->watchthis = true;
1113                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1114                         # Watch creations
1115                         $this->watchthis = true;
1116                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
1117                         # Already watched
1118                         $this->watchthis = true;
1119                 }
1120                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
1121                         $this->minoredit = true;
1122                 }
1123                 if ( $this->textbox1 === false ) {
1124                         return false;
1125                 }
1126                 return true;
1127         }
1128
1129         /**
1130          * @param Content|null $def_content The default value to return
1131          *
1132          * @return Content|null Content on success, $def_content for invalid sections
1133          *
1134          * @since 1.21
1135          */
1136         protected function getContentObject( $def_content = null ) {
1137                 global $wgOut, $wgRequest, $wgUser, $wgContLang;
1138
1139                 $content = false;
1140
1141                 // For message page not locally set, use the i18n message.
1142                 // For other non-existent articles, use preload text if any.
1143                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
1144                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
1145                                 # If this is a system message, get the default text.
1146                                 $msg = $this->mTitle->getDefaultMessageText();
1147
1148                                 $content = $this->toEditContent( $msg );
1149                         }
1150                         if ( $content === false ) {
1151                                 # If requested, preload some text.
1152                                 $preload = $wgRequest->getVal( 'preload',
1153                                         // Custom preload text for new sections
1154                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1155                                 $params = $wgRequest->getArray( 'preloadparams', [] );
1156
1157                                 $content = $this->getPreloadedContent( $preload, $params );
1158                         }
1159                 // For existing pages, get text based on "undo" or section parameters.
1160                 } else {
1161                         if ( $this->section != '' ) {
1162                                 // Get section edit text (returns $def_text for invalid sections)
1163                                 $orig = $this->getOriginalContent( $wgUser );
1164                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1165
1166                                 if ( !$content ) {
1167                                         $content = $def_content;
1168                                 }
1169                         } else {
1170                                 $undoafter = $wgRequest->getInt( 'undoafter' );
1171                                 $undo = $wgRequest->getInt( 'undo' );
1172
1173                                 if ( $undo > 0 && $undoafter > 0 ) {
1174                                         $undorev = Revision::newFromId( $undo );
1175                                         $oldrev = Revision::newFromId( $undoafter );
1176
1177                                         # Sanity check, make sure it's the right page,
1178                                         # the revisions exist and they were not deleted.
1179                                         # Otherwise, $content will be left as-is.
1180                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1181                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1182                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT )
1183                                         ) {
1184                                                 $content = $this->page->getUndoContent( $undorev, $oldrev );
1185
1186                                                 if ( $content === false ) {
1187                                                         # Warn the user that something went wrong
1188                                                         $undoMsg = 'failure';
1189                                                 } else {
1190                                                         $oldContent = $this->page->getContent( Revision::RAW );
1191                                                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
1192                                                         $newContent = $content->preSaveTransform( $this->mTitle, $wgUser, $popts );
1193                                                         if ( $newContent->getModel() !== $oldContent->getModel() ) {
1194                                                                 // The undo may change content
1195                                                                 // model if its reverting the top
1196                                                                 // edit. This can result in
1197                                                                 // mismatched content model/format.
1198                                                                 $this->contentModel = $newContent->getModel();
1199                                                                 $this->contentFormat = $oldrev->getContentFormat();
1200                                                         }
1201
1202                                                         if ( $newContent->equals( $oldContent ) ) {
1203                                                                 # Tell the user that the undo results in no change,
1204                                                                 # i.e. the revisions were already undone.
1205                                                                 $undoMsg = 'nochange';
1206                                                                 $content = false;
1207                                                         } else {
1208                                                                 # Inform the user of our success and set an automatic edit summary
1209                                                                 $undoMsg = 'success';
1210
1211                                                                 # If we just undid one rev, use an autosummary
1212                                                                 $firstrev = $oldrev->getNext();
1213                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1214                                                                         $userText = $undorev->getUserText();
1215                                                                         if ( $userText === '' ) {
1216                                                                                 $undoSummary = $this->context->msg(
1217                                                                                         'undo-summary-username-hidden',
1218                                                                                         $undo
1219                                                                                 )->inContentLanguage()->text();
1220                                                                         } else {
1221                                                                                 $undoSummary = $this->context->msg(
1222                                                                                         'undo-summary',
1223                                                                                         $undo,
1224                                                                                         $userText
1225                                                                                 )->inContentLanguage()->text();
1226                                                                         }
1227                                                                         if ( $this->summary === '' ) {
1228                                                                                 $this->summary = $undoSummary;
1229                                                                         } else {
1230                                                                                 $this->summary = $undoSummary . $this->context->msg( 'colon-separator' )
1231                                                                                         ->inContentLanguage()->text() . $this->summary;
1232                                                                         }
1233                                                                         $this->undidRev = $undo;
1234                                                                 }
1235                                                                 $this->formtype = 'diff';
1236                                                         }
1237                                                 }
1238                                         } else {
1239                                                 // Failed basic sanity checks.
1240                                                 // Older revisions may have been removed since the link
1241                                                 // was created, or we may simply have got bogus input.
1242                                                 $undoMsg = 'norev';
1243                                         }
1244
1245                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1246                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1247                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
1248                                                 $this->context->msg( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1249                                 }
1250
1251                                 if ( $content === false ) {
1252                                         $content = $this->getOriginalContent( $wgUser );
1253                                 }
1254                         }
1255                 }
1256
1257                 return $content;
1258         }
1259
1260         /**
1261          * Get the content of the wanted revision, without section extraction.
1262          *
1263          * The result of this function can be used to compare user's input with
1264          * section replaced in its context (using WikiPage::replaceSectionAtRev())
1265          * to the original text of the edit.
1266          *
1267          * This differs from Article::getContent() that when a missing revision is
1268          * encountered the result will be null and not the
1269          * 'missing-revision' message.
1270          *
1271          * @since 1.19
1272          * @param User $user The user to get the revision for
1273          * @return Content|null
1274          */
1275         private function getOriginalContent( User $user ) {
1276                 if ( $this->section == 'new' ) {
1277                         return $this->getCurrentContent();
1278                 }
1279                 $revision = $this->mArticle->getRevisionFetched();
1280                 if ( $revision === null ) {
1281                         $handler = ContentHandler::getForModelID( $this->contentModel );
1282                         return $handler->makeEmptyContent();
1283                 }
1284                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1285                 return $content;
1286         }
1287
1288         /**
1289          * Get the edit's parent revision ID
1290          *
1291          * The "parent" revision is the ancestor that should be recorded in this
1292          * page's revision history.  It is either the revision ID of the in-memory
1293          * article content, or in the case of a 3-way merge in order to rebase
1294          * across a recoverable edit conflict, the ID of the newer revision to
1295          * which we have rebased this page.
1296          *
1297          * @since 1.27
1298          * @return int Revision ID
1299          */
1300         public function getParentRevId() {
1301                 if ( $this->parentRevId ) {
1302                         return $this->parentRevId;
1303                 } else {
1304                         return $this->mArticle->getRevIdFetched();
1305                 }
1306         }
1307
1308         /**
1309          * Get the current content of the page. This is basically similar to
1310          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1311          * content object is returned instead of null.
1312          *
1313          * @since 1.21
1314          * @return Content
1315          */
1316         protected function getCurrentContent() {
1317                 $rev = $this->page->getRevision();
1318                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1319
1320                 if ( $content === false || $content === null ) {
1321                         $handler = ContentHandler::getForModelID( $this->contentModel );
1322                         return $handler->makeEmptyContent();
1323                 } elseif ( !$this->undidRev ) {
1324                         // Content models should always be the same since we error
1325                         // out if they are different before this point (in ->edit()).
1326                         // The exception being, during an undo, the current revision might
1327                         // differ from the prior revision.
1328                         $logger = LoggerFactory::getInstance( 'editpage' );
1329                         if ( $this->contentModel !== $rev->getContentModel() ) {
1330                                 $logger->warning( "Overriding content model from current edit {prev} to {new}", [
1331                                         'prev' => $this->contentModel,
1332                                         'new' => $rev->getContentModel(),
1333                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1334                                         'method' => __METHOD__
1335                                 ] );
1336                                 $this->contentModel = $rev->getContentModel();
1337                         }
1338
1339                         // Given that the content models should match, the current selected
1340                         // format should be supported.
1341                         if ( !$content->isSupportedFormat( $this->contentFormat ) ) {
1342                                 $logger->warning( "Current revision content format unsupported. Overriding {prev} to {new}", [
1343
1344                                         'prev' => $this->contentFormat,
1345                                         'new' => $rev->getContentFormat(),
1346                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1347                                         'method' => __METHOD__
1348                                 ] );
1349                                 $this->contentFormat = $rev->getContentFormat();
1350                         }
1351                 }
1352                 return $content;
1353         }
1354
1355         /**
1356          * Use this method before edit() to preload some content into the edit box
1357          *
1358          * @param Content $content
1359          *
1360          * @since 1.21
1361          */
1362         public function setPreloadedContent( Content $content ) {
1363                 $this->mPreloadContent = $content;
1364         }
1365
1366         /**
1367          * Get the contents to be preloaded into the box, either set by
1368          * an earlier setPreloadText() or by loading the given page.
1369          *
1370          * @param string $preload Representing the title to preload from.
1371          * @param array $params Parameters to use (interface-message style) in the preloaded text
1372          *
1373          * @return Content
1374          *
1375          * @since 1.21
1376          */
1377         protected function getPreloadedContent( $preload, $params = [] ) {
1378                 global $wgUser;
1379
1380                 if ( !empty( $this->mPreloadContent ) ) {
1381                         return $this->mPreloadContent;
1382                 }
1383
1384                 $handler = ContentHandler::getForModelID( $this->contentModel );
1385
1386                 if ( $preload === '' ) {
1387                         return $handler->makeEmptyContent();
1388                 }
1389
1390                 $title = Title::newFromText( $preload );
1391                 # Check for existence to avoid getting MediaWiki:Noarticletext
1392                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1393                         // TODO: somehow show a warning to the user!
1394                         return $handler->makeEmptyContent();
1395                 }
1396
1397                 $page = WikiPage::factory( $title );
1398                 if ( $page->isRedirect() ) {
1399                         $title = $page->getRedirectTarget();
1400                         # Same as before
1401                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1402                                 // TODO: somehow show a warning to the user!
1403                                 return $handler->makeEmptyContent();
1404                         }
1405                         $page = WikiPage::factory( $title );
1406                 }
1407
1408                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1409                 $content = $page->getContent( Revision::RAW );
1410
1411                 if ( !$content ) {
1412                         // TODO: somehow show a warning to the user!
1413                         return $handler->makeEmptyContent();
1414                 }
1415
1416                 if ( $content->getModel() !== $handler->getModelID() ) {
1417                         $converted = $content->convert( $handler->getModelID() );
1418
1419                         if ( !$converted ) {
1420                                 // TODO: somehow show a warning to the user!
1421                                 wfDebug( "Attempt to preload incompatible content: " .
1422                                         "can't convert " . $content->getModel() .
1423                                         " to " . $handler->getModelID() );
1424
1425                                 return $handler->makeEmptyContent();
1426                         }
1427
1428                         $content = $converted;
1429                 }
1430
1431                 return $content->preloadTransform( $title, $parserOptions, $params );
1432         }
1433
1434         /**
1435          * Make sure the form isn't faking a user's credentials.
1436          *
1437          * @param WebRequest $request
1438          * @return bool
1439          * @private
1440          */
1441         public function tokenOk( &$request ) {
1442                 global $wgUser;
1443                 $token = $request->getVal( 'wpEditToken' );
1444                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1445                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1446                 return $this->mTokenOk;
1447         }
1448
1449         /**
1450          * Sets post-edit cookie indicating the user just saved a particular revision.
1451          *
1452          * This uses a temporary cookie for each revision ID so separate saves will never
1453          * interfere with each other.
1454          *
1455          * Article::view deletes the cookie on server-side after the redirect and
1456          * converts the value to the global JavaScript variable wgPostEdit.
1457          *
1458          * If the variable were set on the server, it would be cached, which is unwanted
1459          * since the post-edit state should only apply to the load right after the save.
1460          *
1461          * @param int $statusValue The status value (to check for new article status)
1462          */
1463         protected function setPostEditCookie( $statusValue ) {
1464                 $revisionId = $this->page->getLatest();
1465                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1466
1467                 $val = 'saved';
1468                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1469                         $val = 'created';
1470                 } elseif ( $this->oldid ) {
1471                         $val = 'restored';
1472                 }
1473
1474                 $response = RequestContext::getMain()->getRequest()->response();
1475                 $response->setCookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION );
1476         }
1477
1478         /**
1479          * Attempt submission
1480          * @param array|bool $resultDetails See docs for $result in internalAttemptSave
1481          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1482          * @return Status The resulting status object.
1483          */
1484         public function attemptSave( &$resultDetails = false ) {
1485                 global $wgUser;
1486
1487                 # Allow bots to exempt some edits from bot flagging
1488                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1489                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1490
1491                 Hooks::run( 'EditPage::attemptSave:after', [ $this, $status, $resultDetails ] );
1492
1493                 return $status;
1494         }
1495
1496         /**
1497          * Handle status, such as after attempt save
1498          *
1499          * @param Status $status
1500          * @param array|bool $resultDetails
1501          *
1502          * @throws ErrorPageError
1503          * @return bool False, if output is done, true if rest of the form should be displayed
1504          */
1505         private function handleStatus( Status $status, $resultDetails ) {
1506                 global $wgUser, $wgOut;
1507
1508                 /**
1509                  * @todo FIXME: once the interface for internalAttemptSave() is made
1510                  *   nicer, this should use the message in $status
1511                  */
1512                 if ( $status->value == self::AS_SUCCESS_UPDATE
1513                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1514                 ) {
1515                         $this->didSave = true;
1516                         if ( !$resultDetails['nullEdit'] ) {
1517                                 $this->setPostEditCookie( $status->value );
1518                         }
1519                 }
1520
1521                 // "wpExtraQueryRedirect" is a hidden input to modify
1522                 // after save URL and is not used by actual edit form
1523                 $request = RequestContext::getMain()->getRequest();
1524                 $extraQueryRedirect = $request->getVal( 'wpExtraQueryRedirect' );
1525
1526                 switch ( $status->value ) {
1527                         case self::AS_HOOK_ERROR_EXPECTED:
1528                         case self::AS_CONTENT_TOO_BIG:
1529                         case self::AS_ARTICLE_WAS_DELETED:
1530                         case self::AS_CONFLICT_DETECTED:
1531                         case self::AS_SUMMARY_NEEDED:
1532                         case self::AS_TEXTBOX_EMPTY:
1533                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1534                         case self::AS_END:
1535                         case self::AS_BLANK_ARTICLE:
1536                         case self::AS_SELF_REDIRECT:
1537                                 return true;
1538
1539                         case self::AS_HOOK_ERROR:
1540                                 return false;
1541
1542                         case self::AS_CANNOT_USE_CUSTOM_MODEL:
1543                         case self::AS_PARSE_ERROR:
1544                                 $wgOut->addWikiText( '<div class="error">' . "\n" . $status->getWikiText() . '</div>' );
1545                                 return true;
1546
1547                         case self::AS_SUCCESS_NEW_ARTICLE:
1548                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1549                                 if ( $extraQueryRedirect ) {
1550                                         if ( $query === '' ) {
1551                                                 $query = $extraQueryRedirect;
1552                                         } else {
1553                                                 $query = $query . '&' . $extraQueryRedirect;
1554                                         }
1555                                 }
1556                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1557                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1558                                 return false;
1559
1560                         case self::AS_SUCCESS_UPDATE:
1561                                 $extraQuery = '';
1562                                 $sectionanchor = $resultDetails['sectionanchor'];
1563
1564                                 // Give extensions a chance to modify URL query on update
1565                                 Hooks::run(
1566                                         'ArticleUpdateBeforeRedirect',
1567                                         [ $this->mArticle, &$sectionanchor, &$extraQuery ]
1568                                 );
1569
1570                                 if ( $resultDetails['redirect'] ) {
1571                                         if ( $extraQuery == '' ) {
1572                                                 $extraQuery = 'redirect=no';
1573                                         } else {
1574                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1575                                         }
1576                                 }
1577                                 if ( $extraQueryRedirect ) {
1578                                         if ( $extraQuery === '' ) {
1579                                                 $extraQuery = $extraQueryRedirect;
1580                                         } else {
1581                                                 $extraQuery = $extraQuery . '&' . $extraQueryRedirect;
1582                                         }
1583                                 }
1584
1585                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1586                                 return false;
1587
1588                         case self::AS_SPAM_ERROR:
1589                                 $this->spamPageWithContent( $resultDetails['spam'] );
1590                                 return false;
1591
1592                         case self::AS_BLOCKED_PAGE_FOR_USER:
1593                                 throw new UserBlockedError( $wgUser->getBlock() );
1594
1595                         case self::AS_IMAGE_REDIRECT_ANON:
1596                         case self::AS_IMAGE_REDIRECT_LOGGED:
1597                                 throw new PermissionsError( 'upload' );
1598
1599                         case self::AS_READ_ONLY_PAGE_ANON:
1600                         case self::AS_READ_ONLY_PAGE_LOGGED:
1601                                 throw new PermissionsError( 'edit' );
1602
1603                         case self::AS_READ_ONLY_PAGE:
1604                                 throw new ReadOnlyError;
1605
1606                         case self::AS_RATE_LIMITED:
1607                                 throw new ThrottledError();
1608
1609                         case self::AS_NO_CREATE_PERMISSION:
1610                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1611                                 throw new PermissionsError( $permission );
1612
1613                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1614                                 throw new PermissionsError( 'editcontentmodel' );
1615
1616                         default:
1617                                 // We don't recognize $status->value. The only way that can happen
1618                                 // is if an extension hook aborted from inside ArticleSave.
1619                                 // Render the status object into $this->hookError
1620                                 // FIXME this sucks, we should just use the Status object throughout
1621                                 $this->hookError = '<div class="error">' ."\n" . $status->getWikiText() .
1622                                         '</div>';
1623                                 return true;
1624                 }
1625         }
1626
1627         /**
1628          * Run hooks that can filter edits just before they get saved.
1629          *
1630          * @param Content $content The Content to filter.
1631          * @param Status $status For reporting the outcome to the caller
1632          * @param User $user The user performing the edit
1633          *
1634          * @return bool
1635          */
1636         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1637                 // Run old style post-section-merge edit filter
1638                 if ( $this->hookError != '' ) {
1639                         # ...or the hook could be expecting us to produce an error
1640                         $status->fatal( 'hookaborted' );
1641                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1642                         return false;
1643                 }
1644
1645                 // Run new style post-section-merge edit filter
1646                 if ( !Hooks::run( 'EditFilterMergedContent',
1647                                 [ $this->mArticle->getContext(), $content, $status, $this->summary,
1648                                 $user, $this->minoredit ] )
1649                 ) {
1650                         # Error messages etc. could be handled within the hook...
1651                         if ( $status->isGood() ) {
1652                                 $status->fatal( 'hookaborted' );
1653                                 // Not setting $this->hookError here is a hack to allow the hook
1654                                 // to cause a return to the edit page without $this->hookError
1655                                 // being set. This is used by ConfirmEdit to display a captcha
1656                                 // without any error message cruft.
1657                         } else {
1658                                 $this->hookError = $status->getWikiText();
1659                         }
1660                         // Use the existing $status->value if the hook set it
1661                         if ( !$status->value ) {
1662                                 $status->value = self::AS_HOOK_ERROR;
1663                         }
1664                         return false;
1665                 } elseif ( !$status->isOK() ) {
1666                         # ...or the hook could be expecting us to produce an error
1667                         // FIXME this sucks, we should just use the Status object throughout
1668                         $this->hookError = $status->getWikiText();
1669                         $status->fatal( 'hookaborted' );
1670                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1671                         return false;
1672                 }
1673
1674                 return true;
1675         }
1676
1677         /**
1678          * Return the summary to be used for a new section.
1679          *
1680          * @param string $sectionanchor Set to the section anchor text
1681          * @return string
1682          */
1683         private function newSectionSummary( &$sectionanchor = null ) {
1684                 global $wgParser;
1685
1686                 if ( $this->sectiontitle !== '' ) {
1687                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1688                         // If no edit summary was specified, create one automatically from the section
1689                         // title and have it link to the new section. Otherwise, respect the summary as
1690                         // passed.
1691                         if ( $this->summary === '' ) {
1692                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1693                                 return $this->context->msg( 'newsectionsummary' )
1694                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1695                         }
1696                 } elseif ( $this->summary !== '' ) {
1697                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1698                         # This is a new section, so create a link to the new section
1699                         # in the revision summary.
1700                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1701                         return $this->context->msg( 'newsectionsummary' )
1702                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1703                 }
1704                 return $this->summary;
1705         }
1706
1707         /**
1708          * Attempt submission (no UI)
1709          *
1710          * @param array $result Array to add statuses to, currently with the
1711          *   possible keys:
1712          *   - spam (string): Spam string from content if any spam is detected by
1713          *     matchSpamRegex.
1714          *   - sectionanchor (string): Section anchor for a section save.
1715          *   - nullEdit (boolean): Set if doEditContent is OK.  True if null edit,
1716          *     false otherwise.
1717          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1718          *     revision is a redirect.
1719          * @param bool $bot True if edit is being made under the bot right.
1720          *
1721          * @return Status Status object, possibly with a message, but always with
1722          *   one of the AS_* constants in $status->value,
1723          *
1724          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1725          *   various error display idiosyncrasies. There are also lots of cases
1726          *   where error metadata is set in the object and retrieved later instead
1727          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1728          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1729          * time.
1730          */
1731         public function internalAttemptSave( &$result, $bot = false ) {
1732                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1733                 global $wgContentHandlerUseDB;
1734
1735                 $status = Status::newGood();
1736
1737                 if ( !Hooks::run( 'EditPage::attemptSave', [ $this ] ) ) {
1738                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1739                         $status->fatal( 'hookaborted' );
1740                         $status->value = self::AS_HOOK_ERROR;
1741                         return $status;
1742                 }
1743
1744                 $spam = $wgRequest->getText( 'wpAntispam' );
1745                 if ( $spam !== '' ) {
1746                         wfDebugLog(
1747                                 'SimpleAntiSpam',
1748                                 $wgUser->getName() .
1749                                 ' editing "' .
1750                                 $this->mTitle->getPrefixedText() .
1751                                 '" submitted bogus field "' .
1752                                 $spam .
1753                                 '"'
1754                         );
1755                         $status->fatal( 'spamprotectionmatch', false );
1756                         $status->value = self::AS_SPAM_ERROR;
1757                         return $status;
1758                 }
1759
1760                 try {
1761                         # Construct Content object
1762                         $textbox_content = $this->toEditContent( $this->textbox1 );
1763                 } catch ( MWContentSerializationException $ex ) {
1764                         $status->fatal(
1765                                 'content-failed-to-parse',
1766                                 $this->contentModel,
1767                                 $this->contentFormat,
1768                                 $ex->getMessage()
1769                         );
1770                         $status->value = self::AS_PARSE_ERROR;
1771                         return $status;
1772                 }
1773
1774                 # Check image redirect
1775                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1776                         $textbox_content->isRedirect() &&
1777                         !$wgUser->isAllowed( 'upload' )
1778                 ) {
1779                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1780                                 $status->setResult( false, $code );
1781
1782                                 return $status;
1783                 }
1784
1785                 # Check for spam
1786                 $match = self::matchSummarySpamRegex( $this->summary );
1787                 if ( $match === false && $this->section == 'new' ) {
1788                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1789                         # regular summaries, it is added to the actual wikitext.
1790                         if ( $this->sectiontitle !== '' ) {
1791                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1792                                 $match = self::matchSpamRegex( $this->sectiontitle );
1793                         } else {
1794                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1795                                 # is used with the 'summary' parameter.
1796                                 $match = self::matchSpamRegex( $this->summary );
1797                         }
1798                 }
1799                 if ( $match === false ) {
1800                         $match = self::matchSpamRegex( $this->textbox1 );
1801                 }
1802                 if ( $match !== false ) {
1803                         $result['spam'] = $match;
1804                         $ip = $wgRequest->getIP();
1805                         $pdbk = $this->mTitle->getPrefixedDBkey();
1806                         $match = str_replace( "\n", '', $match );
1807                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1808                         $status->fatal( 'spamprotectionmatch', $match );
1809                         $status->value = self::AS_SPAM_ERROR;
1810                         return $status;
1811                 }
1812                 if ( !Hooks::run(
1813                         'EditFilter',
1814                         [ $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ] )
1815                 ) {
1816                         # Error messages etc. could be handled within the hook...
1817                         $status->fatal( 'hookaborted' );
1818                         $status->value = self::AS_HOOK_ERROR;
1819                         return $status;
1820                 } elseif ( $this->hookError != '' ) {
1821                         # ...or the hook could be expecting us to produce an error
1822                         $status->fatal( 'hookaborted' );
1823                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1824                         return $status;
1825                 }
1826
1827                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1828                         // Auto-block user's IP if the account was "hard" blocked
1829                         if ( !wfReadOnly() ) {
1830                                 $wgUser->spreadAnyEditBlock();
1831                         }
1832                         # Check block state against master, thus 'false'.
1833                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1834                         return $status;
1835                 }
1836
1837                 $this->contentLength = strlen( $this->textbox1 );
1838                 if ( $this->contentLength > $wgMaxArticleSize * 1024 ) {
1839                         // Error will be displayed by showEditForm()
1840                         $this->tooBig = true;
1841                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1842                         return $status;
1843                 }
1844
1845                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1846                         if ( $wgUser->isAnon() ) {
1847                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1848                                 return $status;
1849                         } else {
1850                                 $status->fatal( 'readonlytext' );
1851                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1852                                 return $status;
1853                         }
1854                 }
1855
1856                 $changingContentModel = false;
1857                 if ( $this->contentModel !== $this->mTitle->getContentModel() ) {
1858                         if ( !$wgContentHandlerUseDB ) {
1859                                 $status->fatal( 'editpage-cannot-use-custom-model' );
1860                                 $status->value = self::AS_CANNOT_USE_CUSTOM_MODEL;
1861                                 return $status;
1862                         } elseif ( !$wgUser->isAllowed( 'editcontentmodel' ) ) {
1863                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1864                                 return $status;
1865                         }
1866                         // Make sure the user can edit the page under the new content model too
1867                         $titleWithNewContentModel = clone $this->mTitle;
1868                         $titleWithNewContentModel->setContentModel( $this->contentModel );
1869                         if ( !$titleWithNewContentModel->userCan( 'editcontentmodel', $wgUser )
1870                                 || !$titleWithNewContentModel->userCan( 'edit', $wgUser )
1871                         ) {
1872                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1873                                 return $status;
1874                         }
1875
1876                         $changingContentModel = true;
1877                         $oldContentModel = $this->mTitle->getContentModel();
1878                 }
1879
1880                 if ( $this->changeTags ) {
1881                         $changeTagsStatus = ChangeTags::canAddTagsAccompanyingChange(
1882                                 $this->changeTags, $wgUser );
1883                         if ( !$changeTagsStatus->isOK() ) {
1884                                 $changeTagsStatus->value = self::AS_CHANGE_TAG_ERROR;
1885                                 return $changeTagsStatus;
1886                         }
1887                 }
1888
1889                 if ( wfReadOnly() ) {
1890                         $status->fatal( 'readonlytext' );
1891                         $status->value = self::AS_READ_ONLY_PAGE;
1892                         return $status;
1893                 }
1894                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 )
1895                         || ( $changingContentModel && $wgUser->pingLimiter( 'editcontentmodel' ) )
1896                 ) {
1897                         $status->fatal( 'actionthrottledtext' );
1898                         $status->value = self::AS_RATE_LIMITED;
1899                         return $status;
1900                 }
1901
1902                 # If the article has been deleted while editing, don't save it without
1903                 # confirmation
1904                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1905                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1906                         return $status;
1907                 }
1908
1909                 # Load the page data from the master. If anything changes in the meantime,
1910                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1911                 $this->page->loadPageData( 'fromdbmaster' );
1912                 $new = !$this->page->exists();
1913
1914                 if ( $new ) {
1915                         // Late check for create permission, just in case *PARANOIA*
1916                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1917                                 $status->fatal( 'nocreatetext' );
1918                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1919                                 wfDebug( __METHOD__ . ": no create permission\n" );
1920                                 return $status;
1921                         }
1922
1923                         // Don't save a new page if it's blank or if it's a MediaWiki:
1924                         // message with content equivalent to default (allow empty pages
1925                         // in this case to disable messages, see T52124)
1926                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1927                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1928                                 $defaultText = $defaultMessageText;
1929                         } else {
1930                                 $defaultText = '';
1931                         }
1932
1933                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
1934                                 $this->blankArticle = true;
1935                                 $status->fatal( 'blankarticle' );
1936                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1937                                 return $status;
1938                         }
1939
1940                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1941                                 return $status;
1942                         }
1943
1944                         $content = $textbox_content;
1945
1946                         $result['sectionanchor'] = '';
1947                         if ( $this->section == 'new' ) {
1948                                 if ( $this->sectiontitle !== '' ) {
1949                                         // Insert the section title above the content.
1950                                         $content = $content->addSectionHeader( $this->sectiontitle );
1951                                 } elseif ( $this->summary !== '' ) {
1952                                         // Insert the section title above the content.
1953                                         $content = $content->addSectionHeader( $this->summary );
1954                                 }
1955                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
1956                         }
1957
1958                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1959
1960                 } else { # not $new
1961
1962                         # Article exists. Check for edit conflict.
1963
1964                         $this->page->clear(); # Force reload of dates, etc.
1965                         $timestamp = $this->page->getTimestamp();
1966                         $latest = $this->page->getLatest();
1967
1968                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1969
1970                         // Check editRevId if set, which handles same-second timestamp collisions
1971                         if ( $timestamp != $this->edittime
1972                                 || ( $this->editRevId !== null && $this->editRevId != $latest )
1973                         ) {
1974                                 $this->isConflict = true;
1975                                 if ( $this->section == 'new' ) {
1976                                         if ( $this->page->getUserText() == $wgUser->getName() &&
1977                                                 $this->page->getComment() == $this->newSectionSummary()
1978                                         ) {
1979                                                 // Probably a duplicate submission of a new comment.
1980                                                 // This can happen when CDN resends a request after
1981                                                 // a timeout but the first one actually went through.
1982                                                 wfDebug( __METHOD__
1983                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
1984                                         } else {
1985                                                 // New comment; suppress conflict.
1986                                                 $this->isConflict = false;
1987                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1988                                         }
1989                                 } elseif ( $this->section == ''
1990                                         && Revision::userWasLastToEdit(
1991                                                 DB_MASTER, $this->mTitle->getArticleID(),
1992                                                 $wgUser->getId(), $this->edittime
1993                                         )
1994                                 ) {
1995                                         # Suppress edit conflict with self, except for section edits where merging is required.
1996                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1997                                         $this->isConflict = false;
1998                                 }
1999                         }
2000
2001                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
2002                         if ( $this->sectiontitle !== '' ) {
2003                                 $sectionTitle = $this->sectiontitle;
2004                         } else {
2005                                 $sectionTitle = $this->summary;
2006                         }
2007
2008                         $content = null;
2009
2010                         if ( $this->isConflict ) {
2011                                 wfDebug( __METHOD__
2012                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
2013                                         . " (id '{$this->editRevId}') (article time '{$timestamp}')\n" );
2014                                 // @TODO: replaceSectionAtRev() with base ID (not prior current) for ?oldid=X case
2015                                 // ...or disable section editing for non-current revisions (not exposed anyway).
2016                                 if ( $this->editRevId !== null ) {
2017                                         $content = $this->page->replaceSectionAtRev(
2018                                                 $this->section,
2019                                                 $textbox_content,
2020                                                 $sectionTitle,
2021                                                 $this->editRevId
2022                                         );
2023                                 } else {
2024                                         $content = $this->page->replaceSectionContent(
2025                                                 $this->section,
2026                                                 $textbox_content,
2027                                                 $sectionTitle,
2028                                                 $this->edittime
2029                                         );
2030                                 }
2031                         } else {
2032                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
2033                                 $content = $this->page->replaceSectionContent(
2034                                         $this->section,
2035                                         $textbox_content,
2036                                         $sectionTitle
2037                                 );
2038                         }
2039
2040                         if ( is_null( $content ) ) {
2041                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
2042                                 $this->isConflict = true;
2043                                 $content = $textbox_content; // do not try to merge here!
2044                         } elseif ( $this->isConflict ) {
2045                                 # Attempt merge
2046                                 if ( $this->mergeChangesIntoContent( $content ) ) {
2047                                         // Successful merge! Maybe we should tell the user the good news?
2048                                         $this->isConflict = false;
2049                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
2050                                 } else {
2051                                         $this->section = '';
2052                                         $this->textbox1 = ContentHandler::getContentText( $content );
2053                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
2054                                 }
2055                         }
2056
2057                         if ( $this->isConflict ) {
2058                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
2059                                 return $status;
2060                         }
2061
2062                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
2063                                 return $status;
2064                         }
2065
2066                         if ( $this->section == 'new' ) {
2067                                 // Handle the user preference to force summaries here
2068                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
2069                                         $this->missingSummary = true;
2070                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
2071                                         $status->value = self::AS_SUMMARY_NEEDED;
2072                                         return $status;
2073                                 }
2074
2075                                 // Do not allow the user to post an empty comment
2076                                 if ( $this->textbox1 == '' ) {
2077                                         $this->missingComment = true;
2078                                         $status->fatal( 'missingcommenttext' );
2079                                         $status->value = self::AS_TEXTBOX_EMPTY;
2080                                         return $status;
2081                                 }
2082                         } elseif ( !$this->allowBlankSummary
2083                                 && !$content->equals( $this->getOriginalContent( $wgUser ) )
2084                                 && !$content->isRedirect()
2085                                 && md5( $this->summary ) == $this->autoSumm
2086                         ) {
2087                                 $this->missingSummary = true;
2088                                 $status->fatal( 'missingsummary' );
2089                                 $status->value = self::AS_SUMMARY_NEEDED;
2090                                 return $status;
2091                         }
2092
2093                         # All's well
2094                         $sectionanchor = '';
2095                         if ( $this->section == 'new' ) {
2096                                 $this->summary = $this->newSectionSummary( $sectionanchor );
2097                         } elseif ( $this->section != '' ) {
2098                                 # Try to get a section anchor from the section source, redirect
2099                                 # to edited section if header found.
2100                                 # XXX: Might be better to integrate this into Article::replaceSectionAtRev
2101                                 # for duplicate heading checking and maybe parsing.
2102                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
2103                                 # We can't deal with anchors, includes, html etc in the header for now,
2104                                 # headline would need to be parsed to improve this.
2105                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
2106                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
2107                                 }
2108                         }
2109                         $result['sectionanchor'] = $sectionanchor;
2110
2111                         // Save errors may fall down to the edit form, but we've now
2112                         // merged the section into full text. Clear the section field
2113                         // so that later submission of conflict forms won't try to
2114                         // replace that into a duplicated mess.
2115                         $this->textbox1 = $this->toEditText( $content );
2116                         $this->section = '';
2117
2118                         $status->value = self::AS_SUCCESS_UPDATE;
2119                 }
2120
2121                 if ( !$this->allowSelfRedirect
2122                         && $content->isRedirect()
2123                         && $content->getRedirectTarget()->equals( $this->getTitle() )
2124                 ) {
2125                         // If the page already redirects to itself, don't warn.
2126                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
2127                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
2128                                 $this->selfRedirect = true;
2129                                 $status->fatal( 'selfredirect' );
2130                                 $status->value = self::AS_SELF_REDIRECT;
2131                                 return $status;
2132                         }
2133                 }
2134
2135                 // Check for length errors again now that the section is merged in
2136                 $this->contentLength = strlen( $this->toEditText( $content ) );
2137                 if ( $this->contentLength > $wgMaxArticleSize * 1024 ) {
2138                         $this->tooBig = true;
2139                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
2140                         return $status;
2141                 }
2142
2143                 $flags = EDIT_AUTOSUMMARY |
2144                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
2145                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
2146                         ( $bot ? EDIT_FORCE_BOT : 0 );
2147
2148                 $doEditStatus = $this->page->doEditContent(
2149                         $content,
2150                         $this->summary,
2151                         $flags,
2152                         false,
2153                         $wgUser,
2154                         $content->getDefaultFormat(),
2155                         $this->changeTags,
2156                         $this->undidRev
2157                 );
2158
2159                 if ( !$doEditStatus->isOK() ) {
2160                         // Failure from doEdit()
2161                         // Show the edit conflict page for certain recognized errors from doEdit(),
2162                         // but don't show it for errors from extension hooks
2163                         $errors = $doEditStatus->getErrorsArray();
2164                         if ( in_array( $errors[0][0],
2165                                         [ 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ] )
2166                         ) {
2167                                 $this->isConflict = true;
2168                                 // Destroys data doEdit() put in $status->value but who cares
2169                                 $doEditStatus->value = self::AS_END;
2170                         }
2171                         return $doEditStatus;
2172                 }
2173
2174                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
2175                 if ( $result['nullEdit'] ) {
2176                         // We don't know if it was a null edit until now, so increment here
2177                         $wgUser->pingLimiter( 'linkpurge' );
2178                 }
2179                 $result['redirect'] = $content->isRedirect();
2180
2181                 $this->updateWatchlist();
2182
2183                 // If the content model changed, add a log entry
2184                 if ( $changingContentModel ) {
2185                         $this->addContentModelChangeLogEntry(
2186                                 $wgUser,
2187                                 $new ? false : $oldContentModel,
2188                                 $this->contentModel,
2189                                 $this->summary
2190                         );
2191                 }
2192
2193                 return $status;
2194         }
2195
2196         /**
2197          * @param User $user
2198          * @param string|false $oldModel false if the page is being newly created
2199          * @param string $newModel
2200          * @param string $reason
2201          */
2202         protected function addContentModelChangeLogEntry( User $user, $oldModel, $newModel, $reason ) {
2203                 $new = $oldModel === false;
2204                 $log = new ManualLogEntry( 'contentmodel', $new ? 'new' : 'change' );
2205                 $log->setPerformer( $user );
2206                 $log->setTarget( $this->mTitle );
2207                 $log->setComment( $reason );
2208                 $log->setParameters( [
2209                         '4::oldmodel' => $oldModel,
2210                         '5::newmodel' => $newModel
2211                 ] );
2212                 $logid = $log->insert();
2213                 $log->publish( $logid );
2214         }
2215
2216         /**
2217          * Register the change of watch status
2218          */
2219         protected function updateWatchlist() {
2220                 global $wgUser;
2221
2222                 if ( !$wgUser->isLoggedIn() ) {
2223                         return;
2224                 }
2225
2226                 $user = $wgUser;
2227                 $title = $this->mTitle;
2228                 $watch = $this->watchthis;
2229                 // Do this in its own transaction to reduce contention...
2230                 DeferredUpdates::addCallableUpdate( function () use ( $user, $title, $watch ) {
2231                         if ( $watch == $user->isWatched( $title, User::IGNORE_USER_RIGHTS ) ) {
2232                                 return; // nothing to change
2233                         }
2234                         WatchAction::doWatchOrUnwatch( $watch, $title, $user );
2235                 } );
2236         }
2237
2238         /**
2239          * Attempts to do 3-way merge of edit content with a base revision
2240          * and current content, in case of edit conflict, in whichever way appropriate
2241          * for the content type.
2242          *
2243          * @since 1.21
2244          *
2245          * @param Content $editContent
2246          *
2247          * @return bool
2248          */
2249         private function mergeChangesIntoContent( &$editContent ) {
2250                 $db = wfGetDB( DB_MASTER );
2251
2252                 // This is the revision the editor started from
2253                 $baseRevision = $this->getBaseRevision();
2254                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
2255
2256                 if ( is_null( $baseContent ) ) {
2257                         return false;
2258                 }
2259
2260                 // The current state, we want to merge updates into it
2261                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2262                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2263
2264                 if ( is_null( $currentContent ) ) {
2265                         return false;
2266                 }
2267
2268                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2269
2270                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2271
2272                 if ( $result ) {
2273                         $editContent = $result;
2274                         // Update parentRevId to what we just merged.
2275                         $this->parentRevId = $currentRevision->getId();
2276                         return true;
2277                 }
2278
2279                 return false;
2280         }
2281
2282         /**
2283          * @note: this method is very poorly named. If the user opened the form with ?oldid=X,
2284          *        one might think of X as the "base revision", which is NOT what this returns.
2285          * @return Revision Current version when the edit was started
2286          */
2287         public function getBaseRevision() {
2288                 if ( !$this->mBaseRevision ) {
2289                         $db = wfGetDB( DB_MASTER );
2290                         $this->mBaseRevision = $this->editRevId
2291                                 ? Revision::newFromId( $this->editRevId, Revision::READ_LATEST )
2292                                 : Revision::loadFromTimestamp( $db, $this->mTitle, $this->edittime );
2293                 }
2294                 return $this->mBaseRevision;
2295         }
2296
2297         /**
2298          * Check given input text against $wgSpamRegex, and return the text of the first match.
2299          *
2300          * @param string $text
2301          *
2302          * @return string|bool Matching string or false
2303          */
2304         public static function matchSpamRegex( $text ) {
2305                 global $wgSpamRegex;
2306                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2307                 $regexes = (array)$wgSpamRegex;
2308                 return self::matchSpamRegexInternal( $text, $regexes );
2309         }
2310
2311         /**
2312          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2313          *
2314          * @param string $text
2315          *
2316          * @return string|bool Matching string or false
2317          */
2318         public static function matchSummarySpamRegex( $text ) {
2319                 global $wgSummarySpamRegex;
2320                 $regexes = (array)$wgSummarySpamRegex;
2321                 return self::matchSpamRegexInternal( $text, $regexes );
2322         }
2323
2324         /**
2325          * @param string $text
2326          * @param array $regexes
2327          * @return bool|string
2328          */
2329         protected static function matchSpamRegexInternal( $text, $regexes ) {
2330                 foreach ( $regexes as $regex ) {
2331                         $matches = [];
2332                         if ( preg_match( $regex, $text, $matches ) ) {
2333                                 return $matches[0];
2334                         }
2335                 }
2336                 return false;
2337         }
2338
2339         public function setHeaders() {
2340                 global $wgOut, $wgUser, $wgAjaxEditStash;
2341
2342                 $wgOut->addModules( 'mediawiki.action.edit' );
2343                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
2344
2345                 if ( $wgUser->getOption( 'showtoolbar' ) ) {
2346                         // The addition of default buttons is handled by getEditToolbar() which
2347                         // has its own dependency on this module. The call here ensures the module
2348                         // is loaded in time (it has position "top") for other modules to register
2349                         // buttons (e.g. extensions, gadgets, user scripts).
2350                         $wgOut->addModules( 'mediawiki.toolbar' );
2351                 }
2352
2353                 if ( $wgUser->getOption( 'uselivepreview' ) ) {
2354                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
2355                 }
2356
2357                 if ( $wgUser->getOption( 'useeditwarning' ) ) {
2358                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
2359                 }
2360
2361                 # Enabled article-related sidebar, toplinks, etc.
2362                 $wgOut->setArticleRelated( true );
2363
2364                 $contextTitle = $this->getContextTitle();
2365                 if ( $this->isConflict ) {
2366                         $msg = 'editconflict';
2367                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2368                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2369                 } else {
2370                         $msg = $contextTitle->exists()
2371                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2372                                         && $contextTitle->getDefaultMessageText() !== false
2373                                 )
2374                                 ? 'editing'
2375                                 : 'creating';
2376                 }
2377
2378                 # Use the title defined by DISPLAYTITLE magic word when present
2379                 # NOTE: getDisplayTitle() returns HTML while getPrefixedText() returns plain text.
2380                 #       setPageTitle() treats the input as wikitext, which should be safe in either case.
2381                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2382                 if ( $displayTitle === false ) {
2383                         $displayTitle = $contextTitle->getPrefixedText();
2384                 }
2385                 $wgOut->setPageTitle( $this->context->msg( $msg, $displayTitle ) );
2386                 # Transmit the name of the message to JavaScript for live preview
2387                 # Keep Resources.php/mediawiki.action.edit.preview in sync with the possible keys
2388                 $wgOut->addJsConfigVars( [
2389                         'wgEditMessage' => $msg,
2390                         'wgAjaxEditStash' => $wgAjaxEditStash,
2391                 ] );
2392         }
2393
2394         /**
2395          * Show all applicable editing introductions
2396          */
2397         protected function showIntro() {
2398                 global $wgOut, $wgUser;
2399                 if ( $this->suppressIntro ) {
2400                         return;
2401                 }
2402
2403                 $namespace = $this->mTitle->getNamespace();
2404
2405                 if ( $namespace == NS_MEDIAWIKI ) {
2406                         # Show a warning if editing an interface message
2407                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2408                         # If this is a default message (but not css or js),
2409                         # show a hint that it is translatable on translatewiki.net
2410                         if ( !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2411                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2412                         ) {
2413                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2414                                 if ( $defaultMessageText !== false ) {
2415                                         $wgOut->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2416                                                 'translateinterface' );
2417                                 }
2418                         }
2419                 } elseif ( $namespace == NS_FILE ) {
2420                         # Show a hint to shared repo
2421                         $file = wfFindFile( $this->mTitle );
2422                         if ( $file && !$file->isLocal() ) {
2423                                 $descUrl = $file->getDescriptionUrl();
2424                                 # there must be a description url to show a hint to shared repo
2425                                 if ( $descUrl ) {
2426                                         if ( !$this->mTitle->exists() ) {
2427                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", [
2428                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2429                                                 ] );
2430                                         } else {
2431                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", [
2432                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2433                                                 ] );
2434                                         }
2435                                 }
2436                         }
2437                 }
2438
2439                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2440                 # Show log extract when the user is currently blocked
2441                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2442                         $username = explode( '/', $this->mTitle->getText(), 2 )[0];
2443                         $user = User::newFromName( $username, false /* allow IP users */ );
2444                         $ip = User::isIP( $username );
2445                         $block = Block::newFromTarget( $user, $user );
2446                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2447                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2448                                         [ 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ] );
2449                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
2450                                 # Show log extract if the user is currently blocked
2451                                 LogEventsList::showLogExtract(
2452                                         $wgOut,
2453                                         'block',
2454                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2455                                         '',
2456                                         [
2457                                                 'lim' => 1,
2458                                                 'showIfEmpty' => false,
2459                                                 'msgKey' => [
2460                                                         'blocked-notice-logextract',
2461                                                         $user->getName() # Support GENDER in notice
2462                                                 ]
2463                                         ]
2464                                 );
2465                         }
2466                 }
2467                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2468                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2469                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2470                                 $this->context->msg( 'helppage' )->inContentLanguage()->text()
2471                         ) );
2472                         if ( $wgUser->isLoggedIn() ) {
2473                                 $wgOut->wrapWikiMsg(
2474                                         // Suppress the external link icon, consider the help url an internal one
2475                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2476                                         [
2477                                                 'newarticletext',
2478                                                 $helpLink
2479                                         ]
2480                                 );
2481                         } else {
2482                                 $wgOut->wrapWikiMsg(
2483                                         // Suppress the external link icon, consider the help url an internal one
2484                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2485                                         [
2486                                                 'newarticletextanon',
2487                                                 $helpLink
2488                                         ]
2489                                 );
2490                         }
2491                 }
2492                 # Give a notice if the user is editing a deleted/moved page...
2493                 if ( !$this->mTitle->exists() ) {
2494                         $dbr = wfGetDB( DB_REPLICA );
2495
2496                         LogEventsList::showLogExtract( $wgOut, [ 'delete', 'move' ], $this->mTitle,
2497                                 '',
2498                                 [
2499                                         'lim' => 10,
2500                                         'conds' => [ 'log_action != ' . $dbr->addQuotes( 'revision' ) ],
2501                                         'showIfEmpty' => false,
2502                                         'msgKey' => [ 'recreate-moveddeleted-warn' ]
2503                                 ]
2504                         );
2505                 }
2506         }
2507
2508         /**
2509          * Attempt to show a custom editing introduction, if supplied
2510          *
2511          * @return bool
2512          */
2513         protected function showCustomIntro() {
2514                 if ( $this->editintro ) {
2515                         $title = Title::newFromText( $this->editintro );
2516                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2517                                 global $wgOut;
2518                                 // Added using template syntax, to take <noinclude>'s into account.
2519                                 $wgOut->addWikiTextTitleTidy(
2520                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2521                                         $this->mTitle
2522                                 );
2523                                 return true;
2524                         }
2525                 }
2526                 return false;
2527         }
2528
2529         /**
2530          * Gets an editable textual representation of $content.
2531          * The textual representation can be turned by into a Content object by the
2532          * toEditContent() method.
2533          *
2534          * If $content is null or false or a string, $content is returned unchanged.
2535          *
2536          * If the given Content object is not of a type that can be edited using
2537          * the text base EditPage, an exception will be raised. Set
2538          * $this->allowNonTextContent to true to allow editing of non-textual
2539          * content.
2540          *
2541          * @param Content|null|bool|string $content
2542          * @return string The editable text form of the content.
2543          *
2544          * @throws MWException If $content is not an instance of TextContent and
2545          *   $this->allowNonTextContent is not true.
2546          */
2547         protected function toEditText( $content ) {
2548                 if ( $content === null || $content === false || is_string( $content ) ) {
2549                         return $content;
2550                 }
2551
2552                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2553                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2554                 }
2555
2556                 return $content->serialize( $this->contentFormat );
2557         }
2558
2559         /**
2560          * Turns the given text into a Content object by unserializing it.
2561          *
2562          * If the resulting Content object is not of a type that can be edited using
2563          * the text base EditPage, an exception will be raised. Set
2564          * $this->allowNonTextContent to true to allow editing of non-textual
2565          * content.
2566          *
2567          * @param string|null|bool $text Text to unserialize
2568          * @return Content|bool|null The content object created from $text. If $text was false
2569          *   or null, false resp. null will be  returned instead.
2570          *
2571          * @throws MWException If unserializing the text results in a Content
2572          *   object that is not an instance of TextContent and
2573          *   $this->allowNonTextContent is not true.
2574          */
2575         protected function toEditContent( $text ) {
2576                 if ( $text === false || $text === null ) {
2577                         return $text;
2578                 }
2579
2580                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2581                         $this->contentModel, $this->contentFormat );
2582
2583                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2584                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2585                 }
2586
2587                 return $content;
2588         }
2589
2590         /**
2591          * Send the edit form and related headers to $wgOut
2592          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2593          *     during form output near the top, for captchas and the like.
2594          *
2595          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2596          * use the EditPage::showEditForm:fields hook instead.
2597          */
2598         public function showEditForm( $formCallback = null ) {
2599                 global $wgOut, $wgUser;
2600
2601                 # need to parse the preview early so that we know which templates are used,
2602                 # otherwise users with "show preview after edit box" will get a blank list
2603                 # we parse this near the beginning so that setHeaders can do the title
2604                 # setting work instead of leaving it in getPreviewText
2605                 $previewOutput = '';
2606                 if ( $this->formtype == 'preview' ) {
2607                         $previewOutput = $this->getPreviewText();
2608                 }
2609
2610                 // Avoid PHP 7.1 warning of passing $this by reference
2611                 $editPage = $this;
2612                 Hooks::run( 'EditPage::showEditForm:initial', [ &$editPage, &$wgOut ] );
2613
2614                 $this->setHeaders();
2615
2616                 $this->addTalkPageText();
2617                 $this->addEditNotices();
2618
2619                 if ( !$this->isConflict &&
2620                         $this->section != '' &&
2621                         !$this->isSectionEditSupported() ) {
2622                         // We use $this->section to much before this and getVal('wgSection') directly in other places
2623                         // at this point we can't reset $this->section to '' to fallback to non-section editing.
2624                         // Someone is welcome to try refactoring though
2625                         $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2626                         return;
2627                 }
2628
2629                 $this->showHeader();
2630
2631                 $wgOut->addHTML( $this->editFormPageTop );
2632
2633                 if ( $wgUser->getOption( 'previewontop' ) ) {
2634                         $this->displayPreviewArea( $previewOutput, true );
2635                 }
2636
2637                 $wgOut->addHTML( $this->editFormTextTop );
2638
2639                 $showToolbar = true;
2640                 if ( $this->wasDeletedSinceLastEdit() ) {
2641                         if ( $this->formtype == 'save' ) {
2642                                 // Hide the toolbar and edit area, user can click preview to get it back
2643                                 // Add an confirmation checkbox and explanation.
2644                                 $showToolbar = false;
2645                         } else {
2646                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2647                                         'deletedwhileediting' );
2648                         }
2649                 }
2650
2651                 // @todo add EditForm plugin interface and use it here!
2652                 //       search for textarea1 and textarea2, and allow EditForm to override all uses.
2653                 $wgOut->addHTML( Html::openElement(
2654                         'form',
2655                         [
2656                                 'class' => $this->oouiEnabled ? 'mw-editform-ooui' : 'mw-editform-legacy',
2657                                 'id' => self::EDITFORM_ID,
2658                                 'name' => self::EDITFORM_ID,
2659                                 'method' => 'post',
2660                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2661                                 'enctype' => 'multipart/form-data'
2662                         ]
2663                 ) );
2664
2665                 if ( is_callable( $formCallback ) ) {
2666                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2667                         call_user_func_array( $formCallback, [ &$wgOut ] );
2668                 }
2669
2670                 // Add an empty field to trip up spambots
2671                 $wgOut->addHTML(
2672                         Xml::openElement( 'div', [ 'id' => 'antispam-container', 'style' => 'display: none;' ] )
2673                         . Html::rawElement(
2674                                 'label',
2675                                 [ 'for' => 'wpAntispam' ],
2676                                 $this->context->msg( 'simpleantispam-label' )->parse()
2677                         )
2678                         . Xml::element(
2679                                 'input',
2680                                 [
2681                                         'type' => 'text',
2682                                         'name' => 'wpAntispam',
2683                                         'id' => 'wpAntispam',
2684                                         'value' => ''
2685                                 ]
2686                         )
2687                         . Xml::closeElement( 'div' )
2688                 );
2689
2690                 // Avoid PHP 7.1 warning of passing $this by reference
2691                 $editPage = $this;
2692                 Hooks::run( 'EditPage::showEditForm:fields', [ &$editPage, &$wgOut ] );
2693
2694                 // Put these up at the top to ensure they aren't lost on early form submission
2695                 $this->showFormBeforeText();
2696
2697                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2698                         $username = $this->lastDelete->user_name;
2699                         $comment = $this->lastDelete->log_comment;
2700
2701                         // It is better to not parse the comment at all than to have templates expanded in the middle
2702                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2703                         $key = $comment === ''
2704                                 ? 'confirmrecreate-noreason'
2705                                 : 'confirmrecreate';
2706                         $wgOut->addHTML(
2707                                 '<div class="mw-confirm-recreate">' .
2708                                         $this->context->msg( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2709                                 Xml::checkLabel( $this->context->msg( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2710                                         [ 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' ]
2711                                 ) .
2712                                 '</div>'
2713                         );
2714                 }
2715
2716                 # When the summary is hidden, also hide them on preview/show changes
2717                 if ( $this->nosummary ) {
2718                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2719                 }
2720
2721                 # If a blank edit summary was previously provided, and the appropriate
2722                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2723                 # user being bounced back more than once in the event that a summary
2724                 # is not required.
2725                 # ####
2726                 # For a bit more sophisticated detection of blank summaries, hash the
2727                 # automatic one and pass that in the hidden field wpAutoSummary.
2728                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2729                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2730                 }
2731
2732                 if ( $this->undidRev ) {
2733                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2734                 }
2735
2736                 if ( $this->selfRedirect ) {
2737                         $wgOut->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2738                 }
2739
2740                 if ( $this->hasPresetSummary ) {
2741                         // If a summary has been preset using &summary= we don't want to prompt for
2742                         // a different summary. Only prompt for a summary if the summary is blanked.
2743                         // (T19416)
2744                         $this->autoSumm = md5( '' );
2745                 }
2746
2747                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2748                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2749
2750                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2751                 $wgOut->addHTML( Html::hidden( 'parentRevId', $this->getParentRevId() ) );
2752
2753                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2754                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2755
2756                 // Preserve &ooui=1 / &ooui=0 from URL parameters after submitting the page for preview
2757                 $wgOut->addHTML( Html::hidden( 'ooui', $this->oouiEnabled ? '1' : '0' ) );
2758
2759                 // following functions will need OOUI, enable it only once; here.
2760                 if ( $this->oouiEnabled ) {
2761                         $wgOut->enableOOUI();
2762                 }
2763
2764                 if ( $this->section == 'new' ) {
2765                         $this->showSummaryInput( true, $this->summary );
2766                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2767                 }
2768
2769                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2770
2771                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2772                         $wgOut->addHTML( EditPage::getEditToolbar( $this->mTitle ) );
2773                 }
2774
2775                 if ( $this->blankArticle ) {
2776                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2777                 }
2778
2779                 if ( $this->isConflict ) {
2780                         // In an edit conflict bypass the overridable content form method
2781                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2782                         // resolved between page source edits and custom ui edits using the
2783                         // custom edit ui.
2784                         $this->textbox2 = $this->textbox1;
2785
2786                         $content = $this->getCurrentContent();
2787                         $this->textbox1 = $this->toEditText( $content );
2788
2789                         $this->showTextbox1();
2790                 } else {
2791                         $this->showContentForm();
2792                 }
2793
2794                 $wgOut->addHTML( $this->editFormTextAfterContent );
2795
2796                 $this->showStandardInputs();
2797
2798                 $this->showFormAfterText();
2799
2800                 $this->showTosSummary();
2801
2802                 $this->showEditTools();
2803
2804                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2805
2806                 $wgOut->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
2807
2808                 $wgOut->addHTML( Html::rawElement( 'div', [ 'class' => 'hiddencats' ],
2809                         Linker::formatHiddenCategories( $this->page->getHiddenCategories() ) ) );
2810
2811                 $wgOut->addHTML( Html::rawElement( 'div', [ 'class' => 'limitreport' ],
2812                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2813
2814                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2815
2816                 if ( $this->isConflict ) {
2817                         try {
2818                                 $this->showConflict();
2819                         } catch ( MWContentSerializationException $ex ) {
2820                                 // this can't really happen, but be nice if it does.
2821                                 $msg = $this->context->msg(
2822                                         'content-failed-to-parse',
2823                                         $this->contentModel,
2824                                         $this->contentFormat,
2825                                         $ex->getMessage()
2826                                 );
2827                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2828                         }
2829                 }
2830
2831                 // Set a hidden field so JS knows what edit form mode we are in
2832                 if ( $this->isConflict ) {
2833                         $mode = 'conflict';
2834                 } elseif ( $this->preview ) {
2835                         $mode = 'preview';
2836                 } elseif ( $this->diff ) {
2837                         $mode = 'diff';
2838                 } else {
2839                         $mode = 'text';
2840                 }
2841                 $wgOut->addHTML( Html::hidden( 'mode', $mode, [ 'id' => 'mw-edit-mode' ] ) );
2842
2843                 // Marker for detecting truncated form data.  This must be the last
2844                 // parameter sent in order to be of use, so do not move me.
2845                 $wgOut->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2846                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2847
2848                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2849                         $this->displayPreviewArea( $previewOutput, false );
2850                 }
2851         }
2852
2853         /**
2854          * Wrapper around TemplatesOnThisPageFormatter to make
2855          * a "templates on this page" list.
2856          *
2857          * @param Title[] $templates
2858          * @return string HTML
2859          */
2860         public function makeTemplatesOnThisPageList( array $templates ) {
2861                 $templateListFormatter = new TemplatesOnThisPageFormatter(
2862                         $this->context, MediaWikiServices::getInstance()->getLinkRenderer()
2863                 );
2864
2865                 // preview if preview, else section if section, else false
2866                 $type = false;
2867                 if ( $this->preview ) {
2868                         $type = 'preview';
2869                 } elseif ( $this->section != '' ) {
2870                         $type = 'section';
2871                 }
2872
2873                 return Html::rawElement( 'div', [ 'class' => 'templatesUsed' ],
2874                         $templateListFormatter->format( $templates, $type )
2875                 );
2876         }
2877
2878         /**
2879          * Extract the section title from current section text, if any.
2880          *
2881          * @param string $text
2882          * @return string|bool String or false
2883          */
2884         public static function extractSectionTitle( $text ) {
2885                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2886                 if ( !empty( $matches[2] ) ) {
2887                         global $wgParser;
2888                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2889                 } else {
2890                         return false;
2891                 }
2892         }
2893
2894         protected function showHeader() {
2895                 global $wgOut, $wgUser;
2896                 global $wgAllowUserCss, $wgAllowUserJs;
2897
2898                 if ( $this->isConflict ) {
2899                         $this->addExplainConflictHeader( $wgOut );
2900                         $this->editRevId = $this->page->getLatest();
2901                 } else {
2902                         if ( $this->section != '' && $this->section != 'new' ) {
2903                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2904                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); // FIXME: use Content object
2905                                         if ( $sectionTitle !== false ) {
2906                                                 $this->summary = "/* $sectionTitle */ ";
2907                                         }
2908                                 }
2909                         }
2910
2911                         $buttonLabel = $this->context->msg( $this->getSaveButtonLabel() )->text();
2912
2913                         if ( $this->missingComment ) {
2914                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2915                         }
2916
2917                         if ( $this->missingSummary && $this->section != 'new' ) {
2918                                 $wgOut->wrapWikiMsg(
2919                                         "<div id='mw-missingsummary'>\n$1\n</div>",
2920                                         [ 'missingsummary', $buttonLabel ]
2921                                 );
2922                         }
2923
2924                         if ( $this->missingSummary && $this->section == 'new' ) {
2925                                 $wgOut->wrapWikiMsg(
2926                                         "<div id='mw-missingcommentheader'>\n$1\n</div>",
2927                                         [ 'missingcommentheader', $buttonLabel ]
2928                                 );
2929                         }
2930
2931                         if ( $this->blankArticle ) {
2932                                 $wgOut->wrapWikiMsg(
2933                                         "<div id='mw-blankarticle'>\n$1\n</div>",
2934                                         [ 'blankarticle', $buttonLabel ]
2935                                 );
2936                         }
2937
2938                         if ( $this->selfRedirect ) {
2939                                 $wgOut->wrapWikiMsg(
2940                                         "<div id='mw-selfredirect'>\n$1\n</div>",
2941                                         [ 'selfredirect', $buttonLabel ]
2942                                 );
2943                         }
2944
2945                         if ( $this->hookError !== '' ) {
2946                                 $wgOut->addWikiText( $this->hookError );
2947                         }
2948
2949                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2950                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2951                         }
2952
2953                         if ( $this->section != 'new' ) {
2954                                 $revision = $this->mArticle->getRevisionFetched();
2955                                 if ( $revision ) {
2956                                         // Let sysop know that this will make private content public if saved
2957
2958                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2959                                                 $wgOut->wrapWikiMsg(
2960                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2961                                                         'rev-deleted-text-permission'
2962                                                 );
2963                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2964                                                 $wgOut->wrapWikiMsg(
2965                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2966                                                         'rev-deleted-text-view'
2967                                                 );
2968                                         }
2969
2970                                         if ( !$revision->isCurrent() ) {
2971                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2972                                                 $wgOut->addWikiMsg( 'editingold' );
2973                                                 $this->isOldRev = true;
2974                                         }
2975                                 } elseif ( $this->mTitle->exists() ) {
2976                                         // Something went wrong
2977
2978                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2979                                                 [ 'missing-revision', $this->oldid ] );
2980                                 }
2981                         }
2982                 }
2983
2984                 if ( wfReadOnly() ) {
2985                         $wgOut->wrapWikiMsg(
2986                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
2987                                 [ 'readonlywarning', wfReadOnlyReason() ]
2988                         );
2989                 } elseif ( $wgUser->isAnon() ) {
2990                         if ( $this->formtype != 'preview' ) {
2991                                 $wgOut->wrapWikiMsg(
2992                                         "<div id='mw-anon-edit-warning' class='warningbox'>\n$1\n</div>",
2993                                         [ 'anoneditwarning',
2994                                                 // Log-in link
2995                                                 SpecialPage::getTitleFor( 'Userlogin' )->getFullURL( [
2996                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
2997                                                 ] ),
2998                                                 // Sign-up link
2999                                                 SpecialPage::getTitleFor( 'CreateAccount' )->getFullURL( [
3000                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
3001                                                 ] )
3002                                         ]
3003                                 );
3004                         } else {
3005                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\" class=\"warningbox\">\n$1</div>",
3006                                         'anonpreviewwarning'
3007                                 );
3008                         }
3009                 } else {
3010                         if ( $this->isCssJsSubpage ) {
3011                                 # Check the skin exists
3012                                 if ( $this->isWrongCaseCssJsPage ) {
3013                                         $wgOut->wrapWikiMsg(
3014                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
3015                                                 [ 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ]
3016                                         );
3017                                 }
3018                                 if ( $this->getTitle()->isSubpageOf( $wgUser->getUserPage() ) ) {
3019                                         $wgOut->wrapWikiMsg( '<div class="mw-usercssjspublic">$1</div>',
3020                                                 $this->isCssSubpage ? 'usercssispublic' : 'userjsispublic'
3021                                         );
3022                                         if ( $this->formtype !== 'preview' ) {
3023                                                 if ( $this->isCssSubpage && $wgAllowUserCss ) {
3024                                                         $wgOut->wrapWikiMsg(
3025                                                                 "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
3026                                                                 [ 'usercssyoucanpreview' ]
3027                                                         );
3028                                                 }
3029
3030                                                 if ( $this->isJsSubpage && $wgAllowUserJs ) {
3031                                                         $wgOut->wrapWikiMsg(
3032                                                                 "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
3033                                                                 [ 'userjsyoucanpreview' ]
3034                                                         );
3035                                                 }
3036                                         }
3037                                 }
3038                         }
3039                 }
3040
3041                 $this->addPageProtectionWarningHeaders();
3042
3043                 $this->addLongPageWarningHeader();
3044
3045                 # Add header copyright warning
3046                 $this->showHeaderCopyrightWarning();
3047         }
3048
3049         /**
3050          * Helper function for summary input functions, which returns the neccessary
3051          * attributes for the input.
3052          *
3053          * @param array|null $inputAttrs Array of attrs to use on the input
3054          * @return array
3055          */
3056         private function getSummaryInputAttributes( array $inputAttrs = null ) {
3057                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
3058                 return ( is_array( $inputAttrs ) ? $inputAttrs : [] ) + [
3059                         'id' => 'wpSummary',
3060                         'name' => 'wpSummary',
3061                         'maxlength' => '200',
3062                         'tabindex' => 1,
3063                         'size' => 60,
3064                         'spellcheck' => 'true',
3065                 ] + Linker::tooltipAndAccesskeyAttribs( 'summary' );
3066         }
3067
3068         /**
3069          * Standard summary input and label (wgSummary), abstracted so EditPage
3070          * subclasses may reorganize the form.
3071          * Note that you do not need to worry about the label's for=, it will be
3072          * inferred by the id given to the input. You can remove them both by
3073          * passing [ 'id' => false ] to $userInputAttrs.
3074          *
3075          * @param string $summary The value of the summary input
3076          * @param string $labelText The html to place inside the label
3077          * @param array $inputAttrs Array of attrs to use on the input
3078          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
3079          *
3080          * @return array An array in the format [ $label, $input ]
3081          */
3082         public function getSummaryInput( $summary = "", $labelText = null,
3083                 $inputAttrs = null, $spanLabelAttrs = null
3084         ) {
3085                 $inputAttrs = $this->getSummaryInputAttributes( $inputAttrs );
3086
3087                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : [] ) + [
3088                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
3089                         'id' => "wpSummaryLabel"
3090                 ];
3091
3092                 $label = null;
3093                 if ( $labelText ) {
3094                         $label = Xml::tags(
3095                                 'label',
3096                                 $inputAttrs['id'] ? [ 'for' => $inputAttrs['id'] ] : null,
3097                                 $labelText
3098                         );
3099                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
3100                 }
3101
3102                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
3103
3104                 return [ $label, $input ];
3105         }
3106
3107         /**
3108          * Same as self::getSummaryInput, but uses OOUI, instead of plain HTML.
3109          * Builds a standard summary input with a label.
3110          *
3111          * @param string $summary The value of the summary input
3112          * @param string $labelText The html to place inside the label
3113          * @param array $inputAttrs Array of attrs to use on the input
3114          *
3115          * @return OOUI\FieldLayout OOUI FieldLayout with Label and Input
3116          */
3117         function getSummaryInputOOUI( $summary = "", $labelText = null, $inputAttrs = null ) {
3118                 $inputAttrs = OOUI\Element::configFromHtmlAttributes(
3119                         $this->getSummaryInputAttributes( $inputAttrs )
3120                 );
3121
3122                 // For compatibility with old scripts and extensions, we want the legacy 'id' on the `<input>`
3123                 $inputAttrs['inputId'] = $inputAttrs['id'];
3124                 $inputAttrs['id'] = 'wpSummaryWidget';
3125
3126                 return new OOUI\FieldLayout(
3127                         new OOUI\TextInputWidget( [
3128                                 'value' => $summary,
3129                                 'infusable' => true,
3130                         ] + $inputAttrs ),
3131                         [
3132                                 'label' => new OOUI\HtmlSnippet( $labelText ),
3133                                 'align' => 'top',
3134                                 'id' => 'wpSummaryLabel',
3135                                 'classes' => [ $this->missingSummary ? 'mw-summarymissed' : 'mw-summary' ],
3136                         ]
3137                 );
3138         }
3139
3140         /**
3141          * @param bool $isSubjectPreview True if this is the section subject/title
3142          *   up top, or false if this is the comment summary
3143          *   down below the textarea
3144          * @param string $summary The text of the summary to display
3145          */
3146         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
3147                 global $wgOut;
3148
3149                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
3150                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
3151                 if ( $isSubjectPreview ) {
3152                         if ( $this->nosummary ) {
3153                                 return;
3154                         }
3155                 } else {
3156                         if ( !$this->mShowSummaryField ) {
3157                                 return;
3158                         }
3159                 }
3160
3161                 $labelText = $this->context->msg( $isSubjectPreview ? 'subject' : 'summary' )->parse();
3162                 if ( $this->oouiEnabled ) {
3163                         $wgOut->addHTML( $this->getSummaryInputOOUI(
3164                                 $summary,
3165                                 $labelText,
3166                                 [ 'class' => $summaryClass ]
3167                         ) );
3168                 } else {
3169                         list( $label, $input ) = $this->getSummaryInput(
3170                                 $summary,
3171                                 $labelText,
3172                                 [ 'class' => $summaryClass ]
3173                         );
3174                         $wgOut->addHTML( "{$label} {$input}" );
3175                 }
3176         }
3177
3178         /**
3179          * @param bool $isSubjectPreview True if this is the section subject/title
3180          *   up top, or false if this is the comment summary
3181          *   down below the textarea
3182          * @param string $summary The text of the summary to display
3183          * @return string
3184          */
3185         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
3186                 // avoid spaces in preview, gets always trimmed on save
3187                 $summary = trim( $summary );
3188                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
3189                         return "";
3190                 }
3191
3192                 global $wgParser;
3193
3194                 if ( $isSubjectPreview ) {
3195                         $summary = $this->context->msg( 'newsectionsummary' )
3196                                 ->rawParams( $wgParser->stripSectionName( $summary ) )
3197                                 ->inContentLanguage()->text();
3198                 }
3199
3200                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
3201
3202                 $summary = $this->context->msg( $message )->parse()
3203                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
3204                 return Xml::tags( 'div', [ 'class' => 'mw-summary-preview' ], $summary );
3205         }
3206
3207         protected function showFormBeforeText() {
3208                 global $wgOut;
3209                 $section = htmlspecialchars( $this->section );
3210                 $wgOut->addHTML( <<<HTML
3211 <input type='hidden' value="{$section}" name="wpSection"/>
3212 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
3213 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
3214 <input type='hidden' value="{$this->editRevId}" name="editRevId" />
3215 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
3216
3217 HTML
3218                 );
3219                 if ( !$this->checkUnicodeCompliantBrowser() ) {
3220                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
3221                 }
3222         }
3223
3224         protected function showFormAfterText() {
3225                 global $wgOut, $wgUser;
3226                 /**
3227                  * To make it harder for someone to slip a user a page
3228                  * which submits an edit form to the wiki without their
3229                  * knowledge, a random token is associated with the login
3230                  * session. If it's not passed back with the submission,
3231                  * we won't save the page, or render user JavaScript and
3232                  * CSS previews.
3233                  *
3234                  * For anon editors, who may not have a session, we just
3235                  * include the constant suffix to prevent editing from
3236                  * broken text-mangling proxies.
3237                  */
3238                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
3239         }
3240
3241         /**
3242          * Subpage overridable method for printing the form for page content editing
3243          * By default this simply outputs wpTextbox1
3244          * Subclasses can override this to provide a custom UI for editing;
3245          * be it a form, or simply wpTextbox1 with a modified content that will be
3246          * reverse modified when extracted from the post data.
3247          * Note that this is basically the inverse for importContentFormData
3248          */
3249         protected function showContentForm() {
3250                 $this->showTextbox1();
3251         }
3252
3253         /**
3254          * Method to output wpTextbox1
3255          * The $textoverride method can be used by subclasses overriding showContentForm
3256          * to pass back to this method.
3257          *
3258          * @param array $customAttribs Array of html attributes to use in the textarea
3259          * @param string $textoverride Optional text to override $this->textarea1 with
3260          */
3261         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
3262                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
3263                         $attribs = [ 'style' => 'display:none;' ];
3264                 } else {
3265                         $classes = []; // Textarea CSS
3266                         if ( $this->mTitle->isProtected( 'edit' ) &&
3267                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
3268                         ) {
3269                                 # Is the title semi-protected?
3270                                 if ( $this->mTitle->isSemiProtected() ) {
3271                                         $classes[] = 'mw-textarea-sprotected';
3272                                 } else {
3273                                         # Then it must be protected based on static groups (regular)
3274                                         $classes[] = 'mw-textarea-protected';
3275                                 }
3276                                 # Is the title cascade-protected?
3277                                 if ( $this->mTitle->isCascadeProtected() ) {
3278                                         $classes[] = 'mw-textarea-cprotected';
3279                                 }
3280                         }
3281                         # Is an old revision being edited?
3282                         if ( $this->isOldRev ) {
3283                                 $classes[] = 'mw-textarea-oldrev';
3284                         }
3285
3286                         $attribs = [ 'tabindex' => 1 ];
3287
3288                         if ( is_array( $customAttribs ) ) {
3289                                 $attribs += $customAttribs;
3290                         }
3291
3292                         if ( count( $classes ) ) {
3293                                 if ( isset( $attribs['class'] ) ) {
3294                                         $classes[] = $attribs['class'];
3295                                 }
3296                                 $attribs['class'] = implode( ' ', $classes );
3297                         }
3298                 }
3299
3300                 $this->showTextbox(
3301                         $textoverride !== null ? $textoverride : $this->textbox1,
3302                         'wpTextbox1',
3303                         $attribs
3304                 );
3305         }
3306
3307         protected function showTextbox2() {
3308                 $this->showTextbox( $this->textbox2, 'wpTextbox2', [ 'tabindex' => 6, 'readonly' ] );
3309         }
3310
3311         protected function showTextbox( $text, $name, $customAttribs = [] ) {
3312                 global $wgOut, $wgUser;
3313
3314                 $wikitext = $this->safeUnicodeOutput( $text );
3315                 $wikitext = $this->addNewLineAtEnd( $wikitext );
3316
3317                 $attribs = $this->buildTextboxAttribs( $name, $customAttribs, $wgUser );
3318
3319                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
3320         }
3321
3322         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
3323                 global $wgOut;
3324                 $classes = [];
3325                 if ( $isOnTop ) {
3326                         $classes[] = 'ontop';
3327                 }
3328
3329                 $attribs = [ 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) ];
3330
3331                 if ( $this->formtype != 'preview' ) {
3332                         $attribs['style'] = 'display: none;';
3333                 }
3334
3335                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
3336
3337                 if ( $this->formtype == 'preview' ) {
3338                         $this->showPreview( $previewOutput );
3339                 } else {
3340                         // Empty content container for LivePreview
3341                         $pageViewLang = $this->mTitle->getPageViewLanguage();
3342                         $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3343                                 'class' => 'mw-content-' . $pageViewLang->getDir() ];
3344                         $wgOut->addHTML( Html::rawElement( 'div', $attribs ) );
3345                 }
3346
3347                 $wgOut->addHTML( '</div>' );
3348
3349                 if ( $this->formtype == 'diff' ) {
3350                         try {
3351                                 $this->showDiff();
3352                         } catch ( MWContentSerializationException $ex ) {
3353                                 $msg = $this->context->msg(
3354                                         'content-failed-to-parse',
3355                                         $this->contentModel,
3356                                         $this->contentFormat,
3357                                         $ex->getMessage()
3358                                 );
3359                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3360                         }
3361                 }
3362         }
3363
3364         /**
3365          * Append preview output to $wgOut.
3366          * Includes category rendering if this is a category page.
3367          *
3368          * @param string $text The HTML to be output for the preview.
3369          */
3370         protected function showPreview( $text ) {
3371                 global $wgOut;
3372                 if ( $this->mArticle instanceof CategoryPage ) {
3373                         $this->mArticle->openShowCategory();
3374                 }
3375                 # This hook seems slightly odd here, but makes things more
3376                 # consistent for extensions.
3377                 Hooks::run( 'OutputPageBeforeHTML', [ &$wgOut, &$text ] );
3378                 $wgOut->addHTML( $text );
3379                 if ( $this->mArticle instanceof CategoryPage ) {
3380                         $this->mArticle->closeShowCategory();
3381                 }
3382         }
3383
3384         /**
3385          * Get a diff between the current contents of the edit box and the
3386          * version of the page we're editing from.
3387          *
3388          * If this is a section edit, we'll replace the section as for final
3389          * save and then make a comparison.
3390          */
3391         public function showDiff() {
3392                 global $wgUser, $wgContLang, $wgOut;
3393
3394                 $oldtitlemsg = 'currentrev';
3395                 # if message does not exist, show diff against the preloaded default
3396                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3397                         $oldtext = $this->mTitle->getDefaultMessageText();
3398                         if ( $oldtext !== false ) {
3399                                 $oldtitlemsg = 'defaultmessagetext';
3400                                 $oldContent = $this->toEditContent( $oldtext );
3401                         } else {
3402                                 $oldContent = null;
3403                         }
3404                 } else {
3405                         $oldContent = $this->getCurrentContent();
3406                 }
3407
3408                 $textboxContent = $this->toEditContent( $this->textbox1 );
3409                 if ( $this->editRevId !== null ) {
3410                         $newContent = $this->page->replaceSectionAtRev(
3411                                 $this->section, $textboxContent, $this->summary, $this->editRevId
3412                         );
3413                 } else {
3414                         $newContent = $this->page->replaceSectionContent(
3415                                 $this->section, $textboxContent, $this->summary, $this->edittime
3416                         );
3417                 }
3418
3419                 if ( $newContent ) {
3420                         Hooks::run( 'EditPageGetDiffContent', [ $this, &$newContent ] );
3421
3422                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
3423                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
3424                 }
3425
3426                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3427                         $oldtitle = $this->context->msg( $oldtitlemsg )->parse();
3428                         $newtitle = $this->context->msg( 'yourtext' )->parse();
3429
3430                         if ( !$oldContent ) {
3431                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3432                         }
3433
3434                         if ( !$newContent ) {
3435                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3436                         }
3437
3438                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
3439                         $de->setContent( $oldContent, $newContent );
3440
3441                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3442                         $de->showDiffStyle();
3443                 } else {
3444                         $difftext = '';
3445                 }
3446
3447                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3448         }
3449
3450         /**
3451          * Show the header copyright warning.
3452          */
3453         protected function showHeaderCopyrightWarning() {
3454                 $msg = 'editpage-head-copy-warn';
3455                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3456                         global $wgOut;
3457                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3458                                 'editpage-head-copy-warn' );
3459                 }
3460         }
3461
3462         /**
3463          * Give a chance for site and per-namespace customizations of
3464          * terms of service summary link that might exist separately
3465          * from the copyright notice.
3466          *
3467          * This will display between the save button and the edit tools,
3468          * so should remain short!
3469          */
3470         protected function showTosSummary() {
3471                 $msg = 'editpage-tos-summary';
3472                 Hooks::run( 'EditPageTosSummary', [ $this->mTitle, &$msg ] );
3473                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3474                         global $wgOut;
3475                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
3476                         $wgOut->addWikiMsg( $msg );
3477                         $wgOut->addHTML( '</div>' );
3478                 }
3479         }
3480
3481         protected function showEditTools() {
3482                 global $wgOut;
3483                 $wgOut->addHTML( '<div class="mw-editTools">' .
3484                         $this->context->msg( 'edittools' )->inContentLanguage()->parse() .
3485                         '</div>' );
3486         }
3487
3488         /**
3489          * Get the copyright warning
3490          *
3491          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3492          * @return string
3493          */
3494         protected function getCopywarn() {
3495                 return self::getCopyrightWarning( $this->mTitle );
3496         }
3497
3498         /**
3499          * Get the copyright warning, by default returns wikitext
3500          *
3501          * @param Title $title
3502          * @param string $format Output format, valid values are any function of a Message object
3503          * @param Language|string|null $langcode Language code or Language object.
3504          * @return string
3505          */
3506         public static function getCopyrightWarning( $title, $format = 'plain', $langcode = null ) {
3507                 global $wgRightsText;
3508                 if ( $wgRightsText ) {
3509                         $copywarnMsg = [ 'copyrightwarning',
3510                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3511                                 $wgRightsText ];
3512                 } else {
3513                         $copywarnMsg = [ 'copyrightwarning2',
3514                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' ];
3515                 }
3516                 // Allow for site and per-namespace customization of contribution/copyright notice.
3517                 Hooks::run( 'EditPageCopyrightWarning', [ $title, &$copywarnMsg ] );
3518
3519                 $msg = call_user_func_array( 'wfMessage', $copywarnMsg )->title( $title );
3520                 if ( $langcode ) {
3521                         $msg->inLanguage( $langcode );
3522                 }
3523                 return "<div id=\"editpage-copywarn\">\n" .
3524                         $msg->$format() . "\n</div>";
3525         }
3526
3527         /**
3528          * Get the Limit report for page previews
3529          *
3530          * @since 1.22
3531          * @param ParserOutput $output ParserOutput object from the parse
3532          * @return string HTML
3533          */
3534         public static function getPreviewLimitReport( $output ) {
3535                 if ( !$output || !$output->getLimitReportData() ) {
3536                         return '';
3537                 }
3538
3539                 $limitReport = Html::rawElement( 'div', [ 'class' => 'mw-limitReportExplanation' ],
3540                         wfMessage( 'limitreport-title' )->parseAsBlock()
3541                 );
3542
3543                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3544                 $limitReport .= Html::openElement( 'div', [ 'class' => 'preview-limit-report-wrapper' ] );
3545
3546                 $limitReport .= Html::openElement( 'table', [
3547                         'class' => 'preview-limit-report wikitable'
3548                 ] ) .
3549                         Html::openElement( 'tbody' );
3550
3551                 foreach ( $output->getLimitReportData() as $key => $value ) {
3552                         if ( Hooks::run( 'ParserLimitReportFormat',
3553                                 [ $key, &$value, &$limitReport, true, true ]
3554                         ) ) {
3555                                 $keyMsg = wfMessage( $key );
3556                                 $valueMsg = wfMessage( [ "$key-value-html", "$key-value" ] );
3557                                 if ( !$valueMsg->exists() ) {
3558                                         $valueMsg = new RawMessage( '$1' );
3559                                 }
3560                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3561                                         $limitReport .= Html::openElement( 'tr' ) .
3562                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3563                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
3564                                                 Html::closeElement( 'tr' );
3565                                 }
3566                         }
3567                 }
3568
3569                 $limitReport .= Html::closeElement( 'tbody' ) .
3570                         Html::closeElement( 'table' ) .
3571                         Html::closeElement( 'div' );
3572
3573                 return $limitReport;
3574         }
3575
3576         protected function showStandardInputs( &$tabindex = 2 ) {
3577                 global $wgOut;
3578                 $wgOut->addHTML( "<div class='editOptions'>\n" );
3579
3580                 if ( $this->section != 'new' ) {
3581                         $this->showSummaryInput( false, $this->summary );
3582                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3583                 }
3584
3585                 if ( $this->oouiEnabled ) {
3586                         $checkboxes = $this->getCheckboxesOOUI(
3587                                 $tabindex,
3588                                 [ 'minor' => $this->minoredit, 'watch' => $this->watchthis ]
3589                         );
3590                         $checkboxesHTML = new OOUI\HorizontalLayout( [ 'items' => $checkboxes ] );
3591                 } else {
3592                         $checkboxes = $this->getCheckboxes(
3593                                 $tabindex,
3594                                 [ 'minor' => $this->minoredit, 'watch' => $this->watchthis ]
3595                         );
3596                         $checkboxesHTML = implode( $checkboxes, "\n" );
3597                 }
3598
3599                 $wgOut->addHTML( "<div class='editCheckboxes'>" . $checkboxesHTML . "</div>\n" );
3600
3601                 // Show copyright warning.
3602                 $wgOut->addWikiText( $this->getCopywarn() );
3603                 $wgOut->addHTML( $this->editFormTextAfterWarn );
3604
3605                 $wgOut->addHTML( "<div class='editButtons'>\n" );
3606                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3607
3608                 $cancel = $this->getCancelLink();
3609                 if ( $cancel !== '' ) {
3610                         $cancel .= Html::element( 'span',
3611                                 [ 'class' => 'mw-editButtons-pipe-separator' ],
3612                                 $this->context->msg( 'pipe-separator' )->text() );
3613                 }
3614
3615                 $message = $this->context->msg( 'edithelppage' )->inContentLanguage()->text();
3616                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3617                 $edithelp =
3618                         Html::linkButton(
3619                                 $this->context->msg( 'edithelp' )->text(),
3620                                 [ 'target' => 'helpwindow', 'href' => $edithelpurl ],
3621                                 [ 'mw-ui-quiet' ]
3622                         ) .
3623                         $this->context->msg( 'word-separator' )->escaped() .
3624                         $this->context->msg( 'newwindow' )->parse();
3625
3626                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
3627                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
3628                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
3629
3630                 Hooks::run( 'EditPage::showStandardInputs:options', [ $this, $wgOut, &$tabindex ] );
3631
3632                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
3633         }
3634
3635         /**
3636          * Show an edit conflict. textbox1 is already shown in showEditForm().
3637          * If you want to use another entry point to this function, be careful.
3638          */
3639         protected function showConflict() {
3640                 global $wgOut;
3641
3642                 // Avoid PHP 7.1 warning of passing $this by reference
3643                 $editPage = $this;
3644                 if ( Hooks::run( 'EditPageBeforeConflictDiff', [ &$editPage, &$wgOut ] ) ) {
3645                         $this->incrementConflictStats();
3646
3647                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3648
3649                         $content1 = $this->toEditContent( $this->textbox1 );
3650                         $content2 = $this->toEditContent( $this->textbox2 );
3651
3652                         $handler = ContentHandler::getForModelID( $this->contentModel );
3653                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3654                         $de->setContent( $content2, $content1 );
3655                         $de->showDiff(
3656                                 $this->context->msg( 'yourtext' )->parse(),
3657                                 $this->context->msg( 'storedversion' )->text()
3658                         );
3659
3660                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3661                         $this->showTextbox2();
3662                 }
3663         }
3664
3665         protected function incrementConflictStats() {
3666                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
3667                 $stats->increment( 'edit.failures.conflict' );
3668                 // Only include 'standard' namespaces to avoid creating unknown numbers of statsd metrics
3669                 if (
3670                         $this->mTitle->getNamespace() >= NS_MAIN &&
3671                         $this->mTitle->getNamespace() <= NS_CATEGORY_TALK
3672                 ) {
3673                         $stats->increment( 'edit.failures.conflict.byNamespaceId.' . $this->mTitle->getNamespace() );
3674                 }
3675         }
3676
3677         /**
3678          * @return string
3679          */
3680         public function getCancelLink() {
3681                 $cancelParams = [];
3682                 if ( !$this->isConflict && $this->oldid > 0 ) {
3683                         $cancelParams['oldid'] = $this->oldid;
3684                 } elseif ( $this->getContextTitle()->isRedirect() ) {
3685                         $cancelParams['redirect'] = 'no';
3686                 }
3687                 if ( $this->oouiEnabled ) {
3688                         return new OOUI\ButtonWidget( [
3689                                 'id' => 'mw-editform-cancel',
3690                                 'href' => $this->getContextTitle()->getLinkUrl( $cancelParams ),
3691                                 'label' => new OOUI\HtmlSnippet( $this->context->msg( 'cancel' )->parse() ),
3692                                 'framed' => false,
3693                                 'infusable' => true,
3694                                 'flags' => 'destructive',
3695                         ] );
3696                 } else {
3697                         return MediaWikiServices::getInstance()->getLinkRenderer()->makeKnownLink(
3698                                 $this->getContextTitle(),
3699                                 new HtmlArmor( $this->context->msg( 'cancel' )->parse() ),
3700                                 Html::buttonAttributes( [ 'id' => 'mw-editform-cancel' ], [ 'mw-ui-quiet' ] ),
3701                                 $cancelParams
3702                         );
3703                 }
3704         }
3705
3706         /**
3707          * Returns the URL to use in the form's action attribute.
3708          * This is used by EditPage subclasses when simply customizing the action
3709          * variable in the constructor is not enough. This can be used when the
3710          * EditPage lives inside of a Special page rather than a custom page action.
3711          *
3712          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3713          * @return string
3714          */
3715         protected function getActionURL( Title $title ) {
3716                 return $title->getLocalURL( [ 'action' => $this->action ] );
3717         }
3718
3719         /**
3720          * Check if a page was deleted while the user was editing it, before submit.
3721          * Note that we rely on the logging table, which hasn't been always there,
3722          * but that doesn't matter, because this only applies to brand new
3723          * deletes.
3724          * @return bool
3725          */
3726         protected function wasDeletedSinceLastEdit() {
3727                 if ( $this->deletedSinceEdit !== null ) {
3728                         return $this->deletedSinceEdit;
3729                 }
3730
3731                 $this->deletedSinceEdit = false;
3732
3733                 if ( !$this->mTitle->exists() && $this->mTitle->isDeletedQuick() ) {
3734                         $this->lastDelete = $this->getLastDelete();
3735                         if ( $this->lastDelete ) {
3736                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3737                                 if ( $deleteTime > $this->starttime ) {
3738                                         $this->deletedSinceEdit = true;
3739                                 }
3740                         }
3741                 }
3742
3743                 return $this->deletedSinceEdit;
3744         }
3745
3746         /**
3747          * @return bool|stdClass
3748          */
3749         protected function getLastDelete() {
3750                 $dbr = wfGetDB( DB_REPLICA );
3751                 $data = $dbr->selectRow(
3752                         [ 'logging', 'user' ],
3753                         [
3754                                 'log_type',
3755                                 'log_action',
3756                                 'log_timestamp',
3757                                 'log_user',
3758                                 'log_namespace',
3759                                 'log_title',
3760                                 'log_comment',
3761                                 'log_params',
3762                                 'log_deleted',
3763                                 'user_name'
3764                         ], [
3765                                 'log_namespace' => $this->mTitle->getNamespace(),
3766                                 'log_title' => $this->mTitle->getDBkey(),
3767                                 'log_type' => 'delete',
3768                                 'log_action' => 'delete',
3769                                 'user_id=log_user'
3770                         ],
3771                         __METHOD__,
3772                         [ 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ]
3773                 );
3774                 // Quick paranoid permission checks...
3775                 if ( is_object( $data ) ) {
3776                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3777                                 $data->user_name = $this->context->msg( 'rev-deleted-user' )->escaped();
3778                         }
3779
3780                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3781                                 $data->log_comment = $this->context->msg( 'rev-deleted-comment' )->escaped();
3782                         }
3783                 }
3784
3785                 return $data;
3786         }
3787
3788         /**
3789          * Get the rendered text for previewing.
3790          * @throws MWException
3791          * @return string
3792          */
3793         public function getPreviewText() {
3794                 global $wgOut, $wgRawHtml, $wgLang;
3795                 global $wgAllowUserCss, $wgAllowUserJs;
3796
3797                 if ( $wgRawHtml && !$this->mTokenOk ) {
3798                         // Could be an offsite preview attempt. This is very unsafe if
3799                         // HTML is enabled, as it could be an attack.
3800                         $parsedNote = '';
3801                         if ( $this->textbox1 !== '' ) {
3802                                 // Do not put big scary notice, if previewing the empty
3803                                 // string, which happens when you initially edit
3804                                 // a category page, due to automatic preview-on-open.
3805                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3806                                         $this->context->msg( 'session_fail_preview_html' )->text() . "</div>",
3807                                         true, /* interface */true );
3808                         }
3809                         $this->incrementEditFailureStats( 'session_loss' );
3810                         return $parsedNote;
3811                 }
3812
3813                 $note = '';
3814
3815                 try {
3816                         $content = $this->toEditContent( $this->textbox1 );
3817
3818                         $previewHTML = '';
3819                         if ( !Hooks::run(
3820                                 'AlternateEditPreview',
3821                                 [ $this, &$content, &$previewHTML, &$this->mParserOutput ] )
3822                         ) {
3823                                 return $previewHTML;
3824                         }
3825
3826                         # provide a anchor link to the editform
3827                         $continueEditing = '<span class="mw-continue-editing">' .
3828                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3829                                 $this->context->msg( 'continue-editing' )->text() . ']]</span>';
3830                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3831                                 if ( $this->mTokenOkExceptSuffix ) {
3832                                         $note = $this->context->msg( 'token_suffix_mismatch' )->plain();
3833                                         $this->incrementEditFailureStats( 'bad_token' );
3834                                 } else {
3835                                         $note = $this->context->msg( 'session_fail_preview' )->plain();
3836                                         $this->incrementEditFailureStats( 'session_loss' );
3837                                 }
3838                         } elseif ( $this->incompleteForm ) {
3839                                 $note = $this->context->msg( 'edit_form_incomplete' )->plain();
3840                                 if ( $this->mTriedSave ) {
3841                                         $this->incrementEditFailureStats( 'incomplete_form' );
3842                                 }
3843                         } else {
3844                                 $note = $this->context->msg( 'previewnote' )->plain() . ' ' . $continueEditing;
3845                         }
3846
3847                         # don't parse non-wikitext pages, show message about preview
3848                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3849                                 if ( $this->mTitle->isCssJsSubpage() ) {
3850                                         $level = 'user';
3851                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3852                                         $level = 'site';
3853                                 } else {
3854                                         $level = false;
3855                                 }
3856
3857                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3858                                         $format = 'css';
3859                                         if ( $level === 'user' && !$wgAllowUserCss ) {
3860                                                 $format = false;
3861                                         }
3862                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3863                                         $format = 'js';
3864                                         if ( $level === 'user' && !$wgAllowUserJs ) {
3865                                                 $format = false;
3866                                         }
3867                                 } else {
3868                                         $format = false;
3869                                 }
3870
3871                                 # Used messages to make sure grep find them:
3872                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3873                                 if ( $level && $format ) {
3874                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3875                                                 $this->context->msg( "{$level}{$format}preview" )->text() .
3876                                                 ' ' . $continueEditing . "</div>";
3877                                 }
3878                         }
3879
3880                         # If we're adding a comment, we need to show the
3881                         # summary as the headline
3882                         if ( $this->section === "new" && $this->summary !== "" ) {
3883                                 $content = $content->addSectionHeader( $this->summary );
3884                         }
3885
3886                         $hook_args = [ $this, &$content ];
3887                         Hooks::run( 'EditPageGetPreviewContent', $hook_args );
3888
3889                         $parserResult = $this->doPreviewParse( $content );
3890                         $parserOutput = $parserResult['parserOutput'];
3891                         $previewHTML = $parserResult['html'];
3892                         $this->mParserOutput = $parserOutput;
3893                         $wgOut->addParserOutputMetadata( $parserOutput );
3894
3895                         if ( count( $parserOutput->getWarnings() ) ) {
3896                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3897                         }
3898
3899                 } catch ( MWContentSerializationException $ex ) {
3900                         $m = $this->context->msg(
3901                                 'content-failed-to-parse',
3902                                 $this->contentModel,
3903                                 $this->contentFormat,
3904                                 $ex->getMessage()
3905                         );
3906                         $note .= "\n\n" . $m->parse();
3907                         $previewHTML = '';
3908                 }
3909
3910                 if ( $this->isConflict ) {
3911                         $conflict = '<h2 id="mw-previewconflict">'
3912                                 . $this->context->msg( 'previewconflict' )->escaped() . "</h2>\n";
3913                 } else {
3914                         $conflict = '<hr />';
3915                 }
3916
3917                 $previewhead = "<div class='previewnote'>\n" .
3918                         '<h2 id="mw-previewheader">' . $this->context->msg( 'preview' )->escaped() . "</h2>" .
3919                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3920
3921                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3922                 $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3923                         'class' => 'mw-content-' . $pageViewLang->getDir() ];
3924                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3925
3926                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3927         }
3928
3929         private function incrementEditFailureStats( $failureType ) {
3930                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
3931                 $stats->increment( 'edit.failures.' . $failureType );
3932         }
3933
3934         /**
3935          * Get parser options for a preview
3936          * @return ParserOptions
3937          */
3938         protected function getPreviewParserOptions() {
3939                 $parserOptions = $this->page->makeParserOptions( $this->mArticle->getContext() );
3940                 $parserOptions->setIsPreview( true );
3941                 $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3942                 $parserOptions->enableLimitReport();
3943                 return $parserOptions;
3944         }
3945
3946         /**
3947          * Parse the page for a preview. Subclasses may override this class, in order
3948          * to parse with different options, or to otherwise modify the preview HTML.
3949          *
3950          * @param Content $content The page content
3951          * @return array with keys:
3952          *   - parserOutput: The ParserOutput object
3953          *   - html: The HTML to be displayed
3954          */
3955         protected function doPreviewParse( Content $content ) {
3956                 global $wgUser;
3957                 $parserOptions = $this->getPreviewParserOptions();
3958                 $pstContent = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3959                 $scopedCallback = $parserOptions->setupFakeRevision(
3960                         $this->mTitle, $pstContent, $wgUser );
3961                 $parserOutput = $pstContent->getParserOutput( $this->mTitle, null, $parserOptions );
3962                 ScopedCallback::consume( $scopedCallback );
3963                 $parserOutput->setEditSectionTokens( false ); // no section edit links
3964                 return [
3965                         'parserOutput' => $parserOutput,
3966                         'html' => $parserOutput->getText() ];
3967         }
3968
3969         /**
3970          * @return array
3971          */
3972         public function getTemplates() {
3973                 if ( $this->preview || $this->section != '' ) {
3974                         $templates = [];
3975                         if ( !isset( $this->mParserOutput ) ) {
3976                                 return $templates;
3977                         }
3978                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3979                                 foreach ( array_keys( $template ) as $dbk ) {
3980                                         $templates[] = Title::makeTitle( $ns, $dbk );
3981                                 }
3982                         }
3983                         return $templates;
3984                 } else {
3985                         return $this->mTitle->getTemplateLinksFrom();
3986                 }
3987         }
3988
3989         /**
3990          * Shows a bulletin board style toolbar for common editing functions.
3991          * It can be disabled in the user preferences.
3992          *
3993          * @param Title $title Title object for the page being edited (optional)
3994          * @return string
3995          */
3996         public static function getEditToolbar( $title = null ) {
3997                 global $wgContLang, $wgOut;
3998                 global $wgEnableUploads, $wgForeignFileRepos;
3999
4000                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
4001                 $showSignature = true;
4002                 if ( $title ) {
4003                         $showSignature = MWNamespace::wantSignatures( $title->getNamespace() );
4004                 }
4005
4006                 /**
4007                  * $toolarray is an array of arrays each of which includes the
4008                  * opening tag, the closing tag, optionally a sample text that is
4009                  * inserted between the two when no selection is highlighted
4010                  * and.  The tip text is shown when the user moves the mouse
4011                  * over the button.
4012                  *
4013                  * Images are defined in ResourceLoaderEditToolbarModule.
4014                  */
4015                 $toolarray = [
4016                         [
4017                                 'id'     => 'mw-editbutton-bold',
4018                                 'open'   => '\'\'\'',
4019                                 'close'  => '\'\'\'',
4020                                 'sample' => wfMessage( 'bold_sample' )->text(),
4021                                 'tip'    => wfMessage( 'bold_tip' )->text(),
4022                         ],
4023                         [
4024                                 'id'     => 'mw-editbutton-italic',
4025                                 'open'   => '\'\'',
4026                                 'close'  => '\'\'',
4027                                 'sample' => wfMessage( 'italic_sample' )->text(),
4028                                 'tip'    => wfMessage( 'italic_tip' )->text(),
4029                         ],
4030                         [
4031                                 'id'     => 'mw-editbutton-link',
4032                                 'open'   => '[[',
4033                                 'close'  => ']]',
4034                                 'sample' => wfMessage( 'link_sample' )->text(),
4035                                 'tip'    => wfMessage( 'link_tip' )->text(),
4036                         ],
4037                         [
4038                                 'id'     => 'mw-editbutton-extlink',
4039                                 'open'   => '[',
4040                                 'close'  => ']',
4041                                 'sample' => wfMessage( 'extlink_sample' )->text(),
4042                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
4043                         ],
4044                         [
4045                                 'id'     => 'mw-editbutton-headline',
4046                                 'open'   => "\n== ",
4047                                 'close'  => " ==\n",
4048                                 'sample' => wfMessage( 'headline_sample' )->text(),
4049                                 'tip'    => wfMessage( 'headline_tip' )->text(),
4050                         ],
4051                         $imagesAvailable ? [
4052                                 'id'     => 'mw-editbutton-image',
4053                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
4054                                 'close'  => ']]',
4055                                 'sample' => wfMessage( 'image_sample' )->text(),
4056                                 'tip'    => wfMessage( 'image_tip' )->text(),
4057                         ] : false,
4058                         $imagesAvailable ? [
4059                                 'id'     => 'mw-editbutton-media',
4060                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
4061                                 'close'  => ']]',
4062                                 'sample' => wfMessage( 'media_sample' )->text(),
4063                                 'tip'    => wfMessage( 'media_tip' )->text(),
4064                         ] : false,
4065                         [
4066                                 'id'     => 'mw-editbutton-nowiki',
4067                                 'open'   => "<nowiki>",
4068                                 'close'  => "</nowiki>",
4069                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
4070                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
4071                         ],
4072                         $showSignature ? [
4073                                 'id'     => 'mw-editbutton-signature',
4074                                 'open'   => wfMessage( 'sig-text', '~~~~' )->inContentLanguage()->text(),
4075                                 'close'  => '',
4076                                 'sample' => '',
4077                                 'tip'    => wfMessage( 'sig_tip' )->text(),
4078                         ] : false,
4079                         [
4080                                 'id'     => 'mw-editbutton-hr',
4081                                 'open'   => "\n----\n",
4082                                 'close'  => '',
4083                                 'sample' => '',
4084                                 'tip'    => wfMessage( 'hr_tip' )->text(),
4085                         ]
4086                 ];
4087
4088                 $script = 'mw.loader.using("mediawiki.toolbar", function () {';
4089                 foreach ( $toolarray as $tool ) {
4090                         if ( !$tool ) {
4091                                 continue;
4092                         }
4093
4094                         $params = [
4095                                 // Images are defined in ResourceLoaderEditToolbarModule
4096                                 false,
4097                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
4098                                 // Older browsers show a "speedtip" type message only for ALT.
4099                                 // Ideally these should be different, realistically they
4100                                 // probably don't need to be.
4101                                 $tool['tip'],
4102                                 $tool['open'],
4103                                 $tool['close'],
4104                                 $tool['sample'],
4105                                 $tool['id'],
4106                         ];
4107
4108                         $script .= Xml::encodeJsCall(
4109                                 'mw.toolbar.addButton',
4110                                 $params,
4111                                 ResourceLoader::inDebugMode()
4112                         );
4113                 }
4114
4115                 $script .= '});';
4116
4117                 $toolbar = '<div id="toolbar"></div>';
4118
4119                 if ( Hooks::run( 'EditPageBeforeEditToolbar', [ &$toolbar ] ) ) {
4120                         // Only add the old toolbar cruft to the page payload if the toolbar has not
4121                         // been over-written by a hook caller
4122                         $wgOut->addScript( ResourceLoader::makeInlineScript( $script ) );
4123                 };
4124
4125                 return $toolbar;
4126         }
4127
4128         /**
4129          * Return an array of checkbox definitions.
4130          *
4131          * Array keys correspond to the `<input>` 'name' attribute to use for each checkbox.
4132          *
4133          * Array values are associative arrays with the following keys:
4134          *  - 'label-message' (required): message for label text
4135          *  - 'id' (required): 'id' attribute for the `<input>`
4136          *  - 'default' (required): default checkedness (true or false)
4137          *  - 'title-message' (optional): used to generate 'title' attribute for the `<label>`
4138          *  - 'tooltip' (optional): used to generate 'title' and 'accesskey' attributes
4139          *    from messages like 'tooltip-foo', 'accesskey-foo'
4140          *  - 'label-id' (optional): 'id' attribute for the `<label>`
4141          *  - 'legacy-name' (optional): short name for backwards-compatibility
4142          * @param array $checked Array of checkbox name (matching the 'legacy-name') => bool,
4143          *   where bool indicates the checked status of the checkbox
4144          * @return array
4145          */
4146         protected function getCheckboxesDefinition( $checked ) {
4147                 global $wgUser;
4148                 $checkboxes = [];
4149
4150                 // don't show the minor edit checkbox if it's a new page or section
4151                 if ( !$this->isNew && $wgUser->isAllowed( 'minoredit' ) ) {
4152                         $checkboxes['wpMinoredit'] = [
4153                                 'id' => 'wpMinoredit',
4154                                 'label-message' => 'minoredit',
4155                                 // Uses messages: tooltip-minoredit, accesskey-minoredit
4156                                 'tooltip' => 'minoredit',
4157                                 'label-id' => 'mw-editpage-minoredit',
4158                                 'legacy-name' => 'minor',
4159                                 'default' => $checked['minor'],
4160                         ];
4161                 }
4162
4163                 if ( $wgUser->isLoggedIn() ) {
4164                         $checkboxes['wpWatchthis'] = [
4165                                 'id' => 'wpWatchthis',
4166                                 'label-message' => 'watchthis',
4167                                 // Uses messages: tooltip-watch, accesskey-watch
4168                                 'tooltip' => 'watch',
4169                                 'label-id' => 'mw-editpage-watch',
4170                                 'legacy-name' => 'watch',
4171                                 'default' => $checked['watch'],
4172                         ];
4173                 }
4174
4175                 $editPage = $this;
4176                 Hooks::run( 'EditPageGetCheckboxesDefinition', [ $editPage, &$checkboxes ] );
4177
4178                 return $checkboxes;
4179         }
4180
4181         /**
4182          * Returns an array of html code of the following checkboxes old style:
4183          * minor and watch
4184          *
4185          * @param int $tabindex Current tabindex
4186          * @param array $checked See getCheckboxesDefinition()
4187          * @return array
4188          */
4189         public function getCheckboxes( &$tabindex, $checked ) {
4190                 global $wgUseMediaWikiUIEverywhere;
4191
4192                 $checkboxes = [];
4193                 $checkboxesDef = $this->getCheckboxesDefinition( $checked );
4194
4195                 // Backwards-compatibility for the EditPageBeforeEditChecks hook
4196                 if ( !$this->isNew ) {
4197                         $checkboxes['minor'] = '';
4198                 }
4199                 $checkboxes['watch'] = '';
4200
4201                 foreach ( $checkboxesDef as $name => $options ) {
4202                         $legacyName = isset( $options['legacy-name'] ) ? $options['legacy-name'] : $name;
4203                         $label = $this->context->msg( $options['label-message'] )->parse();
4204                         $attribs = [
4205                                 'tabindex' => ++$tabindex,
4206                                 'id' => $options['id'],
4207                         ];
4208                         $labelAttribs = [
4209                                 'for' => $options['id'],
4210                         ];
4211                         if ( isset( $options['tooltip'] ) ) {
4212                                 $attribs['accesskey'] = $this->context->msg( "accesskey-{$options['tooltip']}" )->text();
4213                                 $labelAttribs['title'] = Linker::titleAttrib( $options['tooltip'], 'withaccess' );
4214                         }
4215                         if ( isset( $options['title-message'] ) ) {
4216                                 $labelAttribs['title'] = $this->context->msg( $options['title-message'] )->text();
4217                         }
4218                         if ( isset( $options['label-id'] ) ) {
4219                                 $labelAttribs['id'] = $options['label-id'];
4220                         }
4221                         $checkboxHtml =
4222                                 Xml::check( $name, $options['default'], $attribs ) .
4223                                 '&#160;' .
4224                                 Xml::tags( 'label', $labelAttribs, $label );
4225
4226                         if ( $wgUseMediaWikiUIEverywhere ) {
4227                                 $checkboxHtml = Html::rawElement( 'div', [ 'class' => 'mw-ui-checkbox' ], $checkboxHtml );
4228                         }
4229
4230                         $checkboxes[ $legacyName ] = $checkboxHtml;
4231                 }
4232
4233                 // Avoid PHP 7.1 warning of passing $this by reference
4234                 $editPage = $this;
4235                 Hooks::run( 'EditPageBeforeEditChecks', [ &$editPage, &$checkboxes, &$tabindex ], '1.29' );
4236                 return $checkboxes;
4237         }
4238
4239         /**
4240          * Returns an array of html code of the following checkboxes:
4241          * minor and watch
4242          *
4243          * @param int $tabindex Current tabindex
4244          * @param array $checked Array of checkbox => bool, where bool indicates the checked
4245          *                 status of the checkbox
4246          *
4247          * @return array
4248          */
4249         public function getCheckboxesOOUI( &$tabindex, $checked ) {
4250                 $checkboxes = [];
4251                 $checkboxesDef = $this->getCheckboxesDefinition( $checked );
4252
4253                 $origTabindex = $tabindex;
4254
4255                 foreach ( $checkboxesDef as $name => $options ) {
4256                         $legacyName = isset( $options['legacy-name'] ) ? $options['legacy-name'] : $name;
4257
4258                         $title = null;
4259                         $accesskey = null;
4260                         if ( isset( $options['tooltip'] ) ) {
4261                                 $accesskey = $this->context->msg( "accesskey-{$options['tooltip']}" )->text();
4262                                 $title = Linker::titleAttrib( $options['tooltip'], 'withaccess' );
4263                         }
4264                         if ( isset( $options['title-message'] ) ) {
4265                                 $title = $this->context->msg( $options['title-message'] )->text();
4266                         }
4267                         if ( isset( $options['label-id'] ) ) {
4268                                 $labelAttribs['id'] = $options['label-id'];
4269                         }
4270
4271                         $checkboxes[ $legacyName ] = new OOUI\FieldLayout(
4272                                 new OOUI\CheckboxInputWidget( [
4273                                         'tabIndex' => ++$tabindex,
4274                                         'accessKey' => $accesskey,
4275                                         'id' => $options['id'] . 'Widget',
4276                                         'inputId' => $options['id'],
4277                                         'name' => $name,
4278                                         'selected' => $options['default'],
4279                                         'infusable' => true,
4280                                 ] ),
4281                                 [
4282                                         'align' => 'inline',
4283                                         'label' => new OOUI\HtmlSnippet( $this->context->msg( $options['label-message'] )->parse() ),
4284                                         'title' => $title,
4285                                         'id' => isset( $options['label-id'] ) ? $options['label-id'] : null,
4286                                 ]
4287                         );
4288                 }
4289
4290                 // Backwards-compatibility hack to run the EditPageBeforeEditChecks hook. It's important,
4291                 // people have used it for the weirdest things completely unrelated to checkboxes...
4292                 // And if we're gonna run it, might as well allow its legacy checkboxes to be shown.
4293                 $legacyCheckboxes = $this->getCheckboxes( $origTabindex, $checked );
4294                 foreach ( $legacyCheckboxes as $name => $html ) {
4295                         if ( $html && !isset( $checkboxes[$name] ) ) {
4296                                 $checkboxes[$name] = new OOUI\Widget( [ 'content' => new OOUI\HtmlSnippet( $html ) ] );
4297                         }
4298                 }
4299
4300                 return $checkboxes;
4301         }
4302
4303         /**
4304          * Get the message key of the label for the button to save the page
4305          *
4306          * @return string
4307          */
4308         private function getSaveButtonLabel() {
4309                 $labelAsPublish =
4310                         $this->mArticle->getContext()->getConfig()->get( 'EditSubmitButtonLabelPublish' );
4311
4312                 // Can't use $this->isNew as that's also true if we're adding a new section to an extant page
4313                 $newPage = !$this->mTitle->exists();
4314
4315                 if ( $labelAsPublish ) {
4316                         $buttonLabelKey =  $newPage ? 'publishpage' : 'publishchanges';
4317                 } else {
4318                         $buttonLabelKey = $newPage ? 'savearticle' : 'savechanges';
4319                 }
4320
4321                 return $buttonLabelKey;
4322         }
4323
4324         /**
4325          * Returns an array of html code of the following buttons:
4326          * save, diff and preview
4327          *
4328          * @param int $tabindex Current tabindex
4329          *
4330          * @return array
4331          */
4332         public function getEditButtons( &$tabindex ) {
4333                 $buttons = [];
4334
4335                 $buttonLabel = $this->context->msg( $this->getSaveButtonLabel() )->text();
4336
4337                 $attribs = [
4338                         'name' => 'wpSave',
4339                         'tabindex' => ++$tabindex,
4340                 ] + Linker::tooltipAndAccesskeyAttribs( 'save' );
4341
4342                 if ( $this->oouiEnabled ) {
4343                         $saveConfig = OOUI\Element::configFromHtmlAttributes( $attribs );
4344                         $buttons['save'] = new OOUI\ButtonInputWidget( [
4345                                 'id' => 'wpSaveWidget',
4346                                 'inputId' => 'wpSave',
4347                                 // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4348                                 'useInputTag' => true,
4349                                 'flags' => [ 'constructive', 'primary' ],
4350                                 'label' => $buttonLabel,
4351                                 'infusable' => true,
4352                                 'type' => 'submit',
4353                         ] + $saveConfig );
4354                 } else {
4355                         $buttons['save'] = Html::submitButton(
4356                                 $buttonLabel,
4357                                 $attribs + [ 'id' => 'wpSave' ],
4358                                 [ 'mw-ui-progressive' ]
4359                         );
4360                 }
4361
4362                 $attribs = [
4363                         'name' => 'wpPreview',
4364                         'tabindex' => ++$tabindex,
4365                 ] + Linker::tooltipAndAccesskeyAttribs( 'preview' );
4366                 if ( $this->oouiEnabled ) {
4367                         $previewConfig = OOUI\Element::configFromHtmlAttributes( $attribs );
4368                         $buttons['preview'] = new OOUI\ButtonInputWidget( [
4369                                 'id' => 'wpPreviewWidget',
4370                                 'inputId' => 'wpPreview',
4371                                 // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4372                                 'useInputTag' => true,
4373                                 'label' => $this->context->msg( 'showpreview' )->text(),
4374                                 'infusable' => true,
4375                                 'type' => 'submit'
4376                         ] + $previewConfig );
4377                 } else {
4378                         $buttons['preview'] = Html::submitButton(
4379                                 $this->context->msg( 'showpreview' )->text(),
4380                                 $attribs + [ 'id' => 'wpPreview' ]
4381                         );
4382                 }
4383                 $attribs = [
4384                         'name' => 'wpDiff',
4385                         'tabindex' => ++$tabindex,
4386                 ] + Linker::tooltipAndAccesskeyAttribs( 'diff' );
4387                 if ( $this->oouiEnabled ) {
4388                         $diffConfig = OOUI\Element::configFromHtmlAttributes( $attribs );
4389                         $buttons['diff'] = new OOUI\ButtonInputWidget( [
4390                                 'id' => 'wpDiffWidget',
4391                                 'inputId' => 'wpDiff',
4392                                 // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4393                                 'useInputTag' => true,
4394                                 'label' => $this->context->msg( 'showdiff' )->text(),
4395                                 'infusable' => true,
4396                                 'type' => 'submit',
4397                         ] + $diffConfig );
4398                 } else {
4399                         $buttons['diff'] = Html::submitButton(
4400                                 $this->context->msg( 'showdiff' )->text(),
4401                                 $attribs + [ 'id' => 'wpDiff' ]
4402                         );
4403                 }
4404
4405                 // Avoid PHP 7.1 warning of passing $this by reference
4406                 $editPage = $this;
4407                 Hooks::run( 'EditPageBeforeEditButtons', [ &$editPage, &$buttons, &$tabindex ] );
4408
4409                 return $buttons;
4410         }
4411
4412         /**
4413          * Creates a basic error page which informs the user that
4414          * they have attempted to edit a nonexistent section.
4415          */
4416         public function noSuchSectionPage() {
4417                 global $wgOut;
4418
4419                 $wgOut->prepareErrorPage( $this->context->msg( 'nosuchsectiontitle' ) );
4420
4421                 $res = $this->context->msg( 'nosuchsectiontext', $this->section )->parseAsBlock();
4422
4423                 // Avoid PHP 7.1 warning of passing $this by reference
4424                 $editPage = $this;
4425                 Hooks::run( 'EditPageNoSuchSection', [ &$editPage, &$res ] );
4426                 $wgOut->addHTML( $res );
4427
4428                 $wgOut->returnToMain( false, $this->mTitle );
4429         }
4430
4431         /**
4432          * Show "your edit contains spam" page with your diff and text
4433          *
4434          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
4435          */
4436         public function spamPageWithContent( $match = false ) {
4437                 global $wgOut, $wgLang;
4438                 $this->textbox2 = $this->textbox1;
4439
4440                 if ( is_array( $match ) ) {
4441                         $match = $wgLang->listToText( $match );
4442                 }
4443                 $wgOut->prepareErrorPage( $this->context->msg( 'spamprotectiontitle' ) );
4444
4445                 $wgOut->addHTML( '<div id="spamprotected">' );
4446                 $wgOut->addWikiMsg( 'spamprotectiontext' );
4447                 if ( $match ) {
4448                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
4449                 }
4450                 $wgOut->addHTML( '</div>' );
4451
4452                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
4453                 $this->showDiff();
4454
4455                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
4456                 $this->showTextbox2();
4457
4458                 $wgOut->addReturnTo( $this->getContextTitle(), [ 'action' => 'edit' ] );
4459         }
4460
4461         /**
4462          * Check if the browser is on a blacklist of user-agents known to
4463          * mangle UTF-8 data on form submission. Returns true if Unicode
4464          * should make it through, false if it's known to be a problem.
4465          * @return bool
4466          */
4467         private function checkUnicodeCompliantBrowser() {
4468                 global $wgBrowserBlackList, $wgRequest;
4469
4470                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
4471                 if ( $currentbrowser === false ) {
4472                         // No User-Agent header sent? Trust it by default...
4473                         return true;
4474                 }
4475
4476                 foreach ( $wgBrowserBlackList as $browser ) {
4477                         if ( preg_match( $browser, $currentbrowser ) ) {
4478                                 return false;
4479                         }
4480                 }
4481                 return true;
4482         }
4483
4484         /**
4485          * Filter an input field through a Unicode de-armoring process if it
4486          * came from an old browser with known broken Unicode editing issues.
4487          *
4488          * @param WebRequest $request
4489          * @param string $field
4490          * @return string
4491          */
4492         protected function safeUnicodeInput( $request, $field ) {
4493                 $text = rtrim( $request->getText( $field ) );
4494                 return $request->getBool( 'safemode' )
4495                         ? $this->unmakeSafe( $text )
4496                         : $text;
4497         }
4498
4499         /**
4500          * Filter an output field through a Unicode armoring process if it is
4501          * going to an old browser with known broken Unicode editing issues.
4502          *
4503          * @param string $text
4504          * @return string
4505          */
4506         protected function safeUnicodeOutput( $text ) {
4507                 return $this->checkUnicodeCompliantBrowser()
4508                         ? $text
4509                         : $this->makeSafe( $text );
4510         }
4511
4512         /**
4513          * A number of web browsers are known to corrupt non-ASCII characters
4514          * in a UTF-8 text editing environment. To protect against this,
4515          * detected browsers will be served an armored version of the text,
4516          * with non-ASCII chars converted to numeric HTML character references.
4517          *
4518          * Preexisting such character references will have a 0 added to them
4519          * to ensure that round-trips do not alter the original data.
4520          *
4521          * @param string $invalue
4522          * @return string
4523          */
4524         private function makeSafe( $invalue ) {
4525                 // Armor existing references for reversibility.
4526                 $invalue = strtr( $invalue, [ "&#x" => "&#x0" ] );
4527
4528                 $bytesleft = 0;
4529                 $result = "";
4530                 $working = 0;
4531                 $valueLength = strlen( $invalue );
4532                 for ( $i = 0; $i < $valueLength; $i++ ) {
4533                         $bytevalue = ord( $invalue[$i] );
4534                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
4535                                 $result .= chr( $bytevalue );
4536                                 $bytesleft = 0;
4537                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
4538                                 $working = $working << 6;
4539                                 $working += ( $bytevalue & 0x3F );
4540                                 $bytesleft--;
4541                                 if ( $bytesleft <= 0 ) {
4542                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
4543                                 }
4544                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
4545                                 $working = $bytevalue & 0x1F;
4546                                 $bytesleft = 1;
4547                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
4548                                 $working = $bytevalue & 0x0F;
4549                                 $bytesleft = 2;
4550                         } else { // 1111 0xxx
4551                                 $working = $bytevalue & 0x07;
4552                                 $bytesleft = 3;
4553                         }
4554                 }
4555                 return $result;
4556         }
4557
4558         /**
4559          * Reverse the previously applied transliteration of non-ASCII characters
4560          * back to UTF-8. Used to protect data from corruption by broken web browsers
4561          * as listed in $wgBrowserBlackList.
4562          *
4563          * @param string $invalue
4564          * @return string
4565          */
4566         private function unmakeSafe( $invalue ) {
4567                 $result = "";
4568                 $valueLength = strlen( $invalue );
4569                 for ( $i = 0; $i < $valueLength; $i++ ) {
4570                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
4571                                 $i += 3;
4572                                 $hexstring = "";
4573                                 do {
4574                                         $hexstring .= $invalue[$i];
4575                                         $i++;
4576                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
4577
4578                                 // Do some sanity checks. These aren't needed for reversibility,
4579                                 // but should help keep the breakage down if the editor
4580                                 // breaks one of the entities whilst editing.
4581                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) && ( strlen( $hexstring ) <= 6 ) ) {
4582                                         $codepoint = hexdec( $hexstring );
4583                                         $result .= UtfNormal\Utils::codepointToUtf8( $codepoint );
4584                                 } else {
4585                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
4586                                 }
4587                         } else {
4588                                 $result .= substr( $invalue, $i, 1 );
4589                         }
4590                 }
4591                 // reverse the transform that we made for reversibility reasons.
4592                 return strtr( $result, [ "&#x0" => "&#x" ] );
4593         }
4594
4595         /**
4596          * @since 1.29
4597          */
4598         protected function addEditNotices() {
4599                 global $wgOut;
4600
4601                 $editNotices = $this->mTitle->getEditNotices( $this->oldid );
4602                 if ( count( $editNotices ) ) {
4603                         $wgOut->addHTML( implode( "\n", $editNotices ) );
4604                 } else {
4605                         $msg = $this->context->msg( 'editnotice-notext' );
4606                         if ( !$msg->isDisabled() ) {
4607                                 $wgOut->addHTML(
4608                                         '<div class="mw-editnotice-notext">'
4609                                         . $msg->parseAsBlock()
4610                                         . '</div>'
4611                                 );
4612                         }
4613                 }
4614         }
4615
4616         /**
4617          * @since 1.29
4618          */
4619         protected function addTalkPageText() {
4620                 global $wgOut;
4621
4622                 if ( $this->mTitle->isTalkPage() ) {
4623                         $wgOut->addWikiMsg( 'talkpagetext' );
4624                 }
4625         }
4626
4627         /**
4628          * @since 1.29
4629          */
4630         protected function addLongPageWarningHeader() {
4631                 global $wgMaxArticleSize, $wgOut, $wgLang;
4632
4633                 if ( $this->contentLength === false ) {
4634                         $this->contentLength = strlen( $this->textbox1 );
4635                 }
4636
4637                 if ( $this->tooBig || $this->contentLength > $wgMaxArticleSize * 1024 ) {
4638                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
4639                                 [
4640                                         'longpageerror',
4641                                         $wgLang->formatNum( round( $this->contentLength / 1024, 3 ) ),
4642                                         $wgLang->formatNum( $wgMaxArticleSize )
4643                                 ]
4644                         );
4645                 } else {
4646                         if ( !$this->context->msg( 'longpage-hint' )->isDisabled() ) {
4647                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
4648                                         [
4649                                                 'longpage-hint',
4650                                                 $wgLang->formatSize( strlen( $this->textbox1 ) ),
4651                                                 strlen( $this->textbox1 )
4652                                         ]
4653                                 );
4654                         }
4655                 }
4656         }
4657
4658         /**
4659          * @since 1.29
4660          */
4661         protected function addPageProtectionWarningHeaders() {
4662                 global $wgOut;
4663
4664                 if ( $this->mTitle->isProtected( 'edit' ) &&
4665                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
4666                 ) {
4667                         # Is the title semi-protected?
4668                         if ( $this->mTitle->isSemiProtected() ) {
4669                                 $noticeMsg = 'semiprotectedpagewarning';
4670                         } else {
4671                                 # Then it must be protected based on static groups (regular)
4672                                 $noticeMsg = 'protectedpagewarning';
4673                         }
4674                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
4675                                 [ 'lim' => 1, 'msgKey' => [ $noticeMsg ] ] );
4676                 }
4677                 if ( $this->mTitle->isCascadeProtected() ) {
4678                         # Is this page under cascading protection from some source pages?
4679                         /** @var Title[] $cascadeSources */
4680                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
4681                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
4682                         $cascadeSourcesCount = count( $cascadeSources );
4683                         if ( $cascadeSourcesCount > 0 ) {
4684                                 # Explain, and list the titles responsible
4685                                 foreach ( $cascadeSources as $page ) {
4686                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
4687                                 }
4688                         }
4689                         $notice .= '</div>';
4690                         $wgOut->wrapWikiMsg( $notice, [ 'cascadeprotectedwarning', $cascadeSourcesCount ] );
4691                 }
4692                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
4693                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
4694                                 [ 'lim' => 1,
4695                                         'showIfEmpty' => false,
4696                                         'msgKey' => [ 'titleprotectedwarning' ],
4697                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ] );
4698                 }
4699         }
4700
4701         /**
4702          * @param OutputPage $out
4703          * @since 1.29
4704          */
4705         protected function addExplainConflictHeader( OutputPage $out ) {
4706                 $out->wrapWikiMsg(
4707                         "<div class='mw-explainconflict'>\n$1\n</div>",
4708                         [ 'explainconflict', $this->context->msg( $this->getSaveButtonLabel() )->text() ]
4709                 );
4710         }
4711
4712         /**
4713          * @param string $name
4714          * @param mixed[] $customAttribs
4715          * @param User $user
4716          * @return mixed[]
4717          * @since 1.29
4718          */
4719         protected function buildTextboxAttribs( $name, array $customAttribs, User $user ) {
4720                 $attribs = $customAttribs + [
4721                                 'accesskey' => ',',
4722                                 'id' => $name,
4723                                 'cols' => 80,
4724                                 'rows' => 25,
4725                                 // Avoid PHP notices when appending preferences
4726                                 // (appending allows customAttribs['style'] to still work).
4727                                 'style' => ''
4728                         ];
4729
4730                 // The following classes can be used here:
4731                 // * mw-editfont-default
4732                 // * mw-editfont-monospace
4733                 // * mw-editfont-sans-serif
4734                 // * mw-editfont-serif
4735                 $class = 'mw-editfont-' . $user->getOption( 'editfont' );
4736
4737                 if ( isset( $attribs['class'] ) ) {
4738                         if ( is_string( $attribs['class'] ) ) {
4739                                 $attribs['class'] .= ' ' . $class;
4740                         } elseif ( is_array( $attribs['class'] ) ) {
4741                                 $attribs['class'][] = $class;
4742                         }
4743                 } else {
4744                         $attribs['class'] = $class;
4745                 }
4746
4747                 $pageLang = $this->mTitle->getPageLanguage();
4748                 $attribs['lang'] = $pageLang->getHtmlCode();
4749                 $attribs['dir'] = $pageLang->getDir();
4750
4751                 return $attribs;
4752         }
4753
4754         /**
4755          * @param string $wikitext
4756          * @return string
4757          * @since 1.29
4758          */
4759         protected function addNewLineAtEnd( $wikitext ) {
4760                 if ( strval( $wikitext ) !== '' ) {
4761                         // Ensure there's a newline at the end, otherwise adding lines
4762                         // is awkward.
4763                         // But don't add a newline if the text is empty, or Firefox in XHTML
4764                         // mode will show an extra newline. A bit annoying.
4765                         $wikitext .= "\n";
4766                         return $wikitext;
4767                 }
4768                 return $wikitext;
4769         }
4770 }