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 null|string */
 367         public $contentModel = null;
 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          * @param Article $article
 418          */
 419         public function __construct( Article $article ) {
 420                 $this->mArticle = $article;
 421                 $this->page = $article->getPage(); // model object
 422                 $this->mTitle = $article->getTitle();
 423                 $this->context = $article->getContext();
 424
 425                 $this->contentModel = $this->mTitle->getContentModel();
 426
 427                 $handler = ContentHandler::getForModelID( $this->contentModel );
 428                 $this->contentFormat = $handler->getDefaultFormat();
 429         }
 430
 431         /**
 432          * @return Article
 433          */
 434         public function getArticle() {
 435                 return $this->mArticle;
 436         }
 437
 438         /**
 439          * @since 1.28
 440          * @return IContextSource
 441          */
 442         public function getContext() {
 443                 return $this->context;
 444         }
 445
 446         /**
 447          * @since 1.19
 448          * @return Title
 449          */
 450         public function getTitle() {
 451                 return $this->mTitle;
 452         }
 453
 454         /**
 455          * Set the context Title object
 456          *
 457          * @param Title|null $title Title object or null
 458          */
 459         public function setContextTitle( $title ) {
 460                 $this->mContextTitle = $title;
 461         }
 462
 463         /**
 464          * Get the context title object.
 465          * If not set, $wgTitle will be returned. This behavior might change in
 466          * the future to return $this->mTitle instead.
 467          *
 468          * @return Title
 469          */
 470         public function getContextTitle() {
 471                 if ( is_null( $this->mContextTitle ) ) {
 472                         global $wgTitle;
 473                         return $wgTitle;
 474                 } else {
 475                         return $this->mContextTitle;
 476                 }
 477         }
 478
 479         /**
 480          * Returns if the given content model is editable.
 481          *
 482          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 483          * @return bool
 484          * @throws MWException If $modelId has no known handler
 485          */
 486         public function isSupportedContentModel( $modelId ) {
 487                 return $this->enableApiEditOverride === true ||
 488                         ContentHandler::getForModelID( $modelId )->supportsDirectEditing();
 489         }
 490
 491         /**
 492          * Allow editing of content that supports API direct editing, but not general
 493          * direct editing. Set to false by default.
 494          *
 495          * @param bool $enableOverride
 496          */
 497         public function setApiEditOverride( $enableOverride ) {
 498                 $this->enableApiEditOverride = $enableOverride;
 499         }
 500
 501         /**
 502          * @deprecated since 1.29, call edit directly
 503          */
 504         function submit() {
 505                 $this->edit();
 506         }
 507
 508         /**
 509          * This is the function that gets called for "action=edit". It
 510          * sets up various member variables, then passes execution to
 511          * another function, usually showEditForm()
 512          *
 513          * The edit form is self-submitting, so that when things like
 514          * preview and edit conflicts occur, we get the same form back
 515          * with the extra stuff added.  Only when the final submission
 516          * is made and all is well do we actually save and redirect to
 517          * the newly-edited page.
 518          */
 519         function edit() {
 520                 global $wgOut, $wgRequest, $wgUser;
 521                 // Allow extensions to modify/prevent this form or submission
 522                 if ( !Hooks::run( 'AlternateEdit', [ $this ] ) ) {
 523                         return;
 524                 }
 525
 526                 wfDebug( __METHOD__ . ": enter\n" );
 527
 528                 // If they used redlink=1 and the page exists, redirect to the main article
 529                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 530                         $wgOut->redirect( $this->mTitle->getFullURL() );
 531                         return;
 532                 }
 533
 534                 $this->importFormData( $wgRequest );
 535                 $this->firsttime = false;
 536
 537                 if ( wfReadOnly() && $this->save ) {
 538                         // Force preview
 539                         $this->save = false;
 540                         $this->preview = true;
 541                 }
 542
 543                 if ( $this->save ) {
 544                         $this->formtype = 'save';
 545                 } elseif ( $this->preview ) {
 546                         $this->formtype = 'preview';
 547                 } elseif ( $this->diff ) {
 548                         $this->formtype = 'diff';
 549                 } else { # First time through
 550                         $this->firsttime = true;
 551                         if ( $this->previewOnOpen() ) {
 552                                 $this->formtype = 'preview';
 553                         } else {
 554                                 $this->formtype = 'initial';
 555                         }
 556                 }
 557
 558                 $permErrors = $this->getEditPermissionErrors( $this->save ? 'secure' : 'full' );
 559                 if ( $permErrors ) {
 560                         wfDebug( __METHOD__ . ": User can't edit\n" );
 561                         // Auto-block user's IP if the account was "hard" blocked
 562                         if ( !wfReadOnly() ) {
 563                                 $user = $wgUser;
 564                                 DeferredUpdates::addCallableUpdate( function () use ( $user ) {
 565                                         $user->spreadAnyEditBlock();
 566                                 } );
 567                         }
 568                         $this->displayPermissionsError( $permErrors );
 569
 570                         return;
 571                 }
 572
 573                 $revision = $this->mArticle->getRevisionFetched();
 574                 // Disallow editing revisions with content models different from the current one
 575                 // Undo edits being an exception in order to allow reverting content model changes.
 576                 if ( $revision
 577                         && $revision->getContentModel() !== $this->contentModel
 578                 ) {
 579                         $prevRev = null;
 580                         if ( $this->undidRev ) {
 581                                 $undidRevObj = Revision::newFromId( $this->undidRev );
 582                                 $prevRev = $undidRevObj ? $undidRevObj->getPrevious() : null;
 583                         }
 584                         if ( !$this->undidRev
 585                                 || !$prevRev
 586                                 || $prevRev->getContentModel() !== $this->contentModel
 587                         ) {
 588                                 $this->displayViewSourcePage(
 589                                         $this->getContentObject(),
 590                                         $this->context->msg(
 591                                                 'contentmodelediterror',
 592                                                 $revision->getContentModel(),
 593                                                 $this->contentModel
 594                                         )->plain()
 595                                 );
 596                                 return;
 597                         }
 598                 }
 599
 600                 $this->isConflict = false;
 601                 // css / js subpages of user pages get a special treatment
 602                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 603                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 604                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 605                 // @todo FIXME: Silly assignment.
 606                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 607
 608                 # Show applicable editing introductions
 609                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 610                         $this->showIntro();
 611                 }
 612
 613                 # Attempt submission here.  This will check for edit conflicts,
 614                 # and redundantly check for locked database, blocked IPs, etc.
 615                 # that edit() already checked just in case someone tries to sneak
 616                 # in the back door with a hand-edited submission URL.
 617
 618                 if ( 'save' == $this->formtype ) {
 619                         $resultDetails = null;
 620                         $status = $this->attemptSave( $resultDetails );
 621                         if ( !$this->handleStatus( $status, $resultDetails ) ) {
 622                                 return;
 623                         }
 624                 }
 625
 626                 # First time through: get contents, set time for conflict
 627                 # checking, etc.
 628                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 629                         if ( $this->initialiseForm() === false ) {
 630                                 $this->noSuchSectionPage();
 631                                 return;
 632                         }
 633
 634                         if ( !$this->mTitle->getArticleID() ) {
 635                                 Hooks::run( 'EditFormPreloadText', [ &$this->textbox1, &$this->mTitle ] );
 636                         } else {
 637                                 Hooks::run( 'EditFormInitialText', [ $this ] );
 638                         }
 639
 640                 }
 641
 642                 $this->showEditForm();
 643         }
 644
 645         /**
 646          * @param string $rigor Same format as Title::getUserPermissionErrors()
 647          * @return array
 648          */
 649         protected function getEditPermissionErrors( $rigor = 'secure' ) {
 650                 global $wgUser;
 651
 652                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser, $rigor );
 653                 # Can this title be created?
 654                 if ( !$this->mTitle->exists() ) {
 655                         $permErrors = array_merge(
 656                                 $permErrors,
 657                                 wfArrayDiff2(
 658                                         $this->mTitle->getUserPermissionsErrors( 'create', $wgUser, $rigor ),
 659                                         $permErrors
 660                                 )
 661                         );
 662                 }
 663                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 664                 $remove = [];
 665                 foreach ( $permErrors as $error ) {
 666                         if ( ( $this->preview || $this->diff )
 667                                 && (
 668                                         $error[0] == 'blockedtext' ||
 669                                         $error[0] == 'autoblockedtext' ||
 670                                         $error[0] == 'systemblockedtext'
 671                                 )
 672                         ) {
 673                                 $remove[] = $error;
 674                         }
 675                 }
 676                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 677
 678                 return $permErrors;
 679         }
 680
 681         /**
 682          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 683          * but with the following differences:
 684          * - If redlink=1, the user will be redirected to the page
 685          * - If there is content to display or the error occurs while either saving,
 686          *   previewing or showing the difference, it will be a
 687          *   "View source for ..." page displaying the source code after the error message.
 688          *
 689          * @since 1.19
 690          * @param array $permErrors Array of permissions errors, as returned by
 691          *    Title::getUserPermissionsErrors().
 692          * @throws PermissionsError
 693          */
 694         protected function displayPermissionsError( array $permErrors ) {
 695                 global $wgRequest, $wgOut;
 696
 697                 if ( $wgRequest->getBool( 'redlink' ) ) {
 698                         // The edit page was reached via a red link.
 699                         // Redirect to the article page and let them click the edit tab if
 700                         // they really want a permission error.
 701                         $wgOut->redirect( $this->mTitle->getFullURL() );
 702                         return;
 703                 }
 704
 705                 $content = $this->getContentObject();
 706
 707                 # Use the normal message if there's nothing to display
 708                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 709                         $action = $this->mTitle->exists() ? 'edit' :
 710                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 711                         throw new PermissionsError( $action, $permErrors );
 712                 }
 713
 714                 $this->displayViewSourcePage(
 715                         $content,
 716                         $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' )
 717                 );
 718         }
 719
 720         /**
 721          * Display a read-only View Source page
 722          * @param Content $content content object
 723          * @param string $errorMessage additional wikitext error message to display
 724          */
 725         protected function displayViewSourcePage( Content $content, $errorMessage = '' ) {
 726                 global $wgOut;
 727
 728                 Hooks::run( 'EditPage::showReadOnlyForm:initial', [ $this, &$wgOut ] );
 729
 730                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 731                 $wgOut->setPageTitle( $this->context->msg(
 732                         'viewsource-title',
 733                         $this->getContextTitle()->getPrefixedText()
 734                 ) );
 735                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 736                 $wgOut->addHTML( $this->editFormPageTop );
 737                 $wgOut->addHTML( $this->editFormTextTop );
 738
 739                 if ( $errorMessage !== '' ) {
 740                         $wgOut->addWikiText( $errorMessage );
 741                         $wgOut->addHTML( "<hr />\n" );
 742                 }
 743
 744                 # If the user made changes, preserve them when showing the markup
 745                 # (This happens when a user is blocked during edit, for instance)
 746                 if ( !$this->firsttime ) {
 747                         $text = $this->textbox1;
 748                         $wgOut->addWikiMsg( 'viewyourtext' );
 749                 } else {
 750                         try {
 751                                 $text = $this->toEditText( $content );
 752                         } catch ( MWException $e ) {
 753                                 # Serialize using the default format if the content model is not supported
 754                                 # (e.g. for an old revision with a different model)
 755                                 $text = $content->serialize();
 756                         }
 757                         $wgOut->addWikiMsg( 'viewsourcetext' );
 758                 }
 759
 760                 $wgOut->addHTML( $this->editFormTextBeforeContent );
 761                 $this->showTextbox( $text, 'wpTextbox1', [ 'readonly' ] );
 762                 $wgOut->addHTML( $this->editFormTextAfterContent );
 763
 764                 $wgOut->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
 765
 766                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 767
 768                 $wgOut->addHTML( $this->editFormTextBottom );
 769                 if ( $this->mTitle->exists() ) {
 770                         $wgOut->returnToMain( null, $this->mTitle );
 771                 }
 772         }
 773
 774         /**
 775          * Should we show a preview when the edit form is first shown?
 776          *
 777          * @return bool
 778          */
 779         protected function previewOnOpen() {
 780                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 781                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 782                         // Explicit override from request
 783                         return true;
 784                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 785                         // Explicit override from request
 786                         return false;
 787                 } elseif ( $this->section == 'new' ) {
 788                         // Nothing *to* preview for new sections
 789                         return false;
 790                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 791                         && $wgUser->getOption( 'previewonfirst' )
 792                 ) {
 793                         // Standard preference behavior
 794                         return true;
 795                 } elseif ( !$this->mTitle->exists()
 796                         && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 797                         && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
 798                 ) {
 799                         // Categories are special
 800                         return true;
 801                 } else {
 802                         return false;
 803                 }
 804         }
 805
 806         /**
 807          * Checks whether the user entered a skin name in uppercase,
 808          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 809          *
 810          * @return bool
 811          */
 812         protected function isWrongCaseCssJsPage() {
 813                 if ( $this->mTitle->isCssJsSubpage() ) {
 814                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 815                         $skins = array_merge(
 816                                 array_keys( Skin::getSkinNames() ),
 817                                 [ 'common' ]
 818                         );
 819                         return !in_array( $name, $skins )
 820                                 && in_array( strtolower( $name ), $skins );
 821                 } else {
 822                         return false;
 823                 }
 824         }
 825
 826         /**
 827          * Returns whether section editing is supported for the current page.
 828          * Subclasses may override this to replace the default behavior, which is
 829          * to check ContentHandler::supportsSections.
 830          *
 831          * @return bool True if this edit page supports sections, false otherwise.
 832          */
 833         protected function isSectionEditSupported() {
 834                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 835                 return $contentHandler->supportsSections();
 836         }
 837
 838         /**
 839          * This function collects the form data and uses it to populate various member variables.
 840          * @param WebRequest $request
 841          * @throws ErrorPageError
 842          */
 843         function importFormData( &$request ) {
 844                 global $wgContLang, $wgUser;
 845
 846                 # Section edit can come from either the form or a link
 847                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 848
 849                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 850                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 851                 }
 852
 853                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 854
 855                 if ( $request->wasPosted() ) {
 856                         # These fields need to be checked for encoding.
 857                         # Also remove trailing whitespace, but don't remove _initial_
 858                         # whitespace from the text boxes. This may be significant formatting.
 859                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 860                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 861                                 // Skip this if wpTextbox2 has input, it indicates that we came
 862                                 // from a conflict page with raw page text, not a custom form
 863                                 // modified by subclasses
 864                                 $textbox1 = $this->importContentFormData( $request );
 865                                 if ( $textbox1 !== null ) {
 866                                         $this->textbox1 = $textbox1;
 867                                 }
 868                         }
 869
 870                         # Truncate for whole multibyte characters
 871                         $this->summary = $wgContLang->truncate( $request->getText( 'wpSummary' ), 255 );
 872
 873                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 874                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 875                         # section titles.
 876                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 877
 878                         # Treat sectiontitle the same way as summary.
 879                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 880                         # currently doing double duty as both edit summary and section title. Right now this
 881                         # is just to allow API edits to work around this limitation, but this should be
 882                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 883                         $this->sectiontitle = $wgContLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 884                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 885
 886                         $this->edittime = $request->getVal( 'wpEdittime' );
 887                         $this->editRevId = $request->getIntOrNull( 'editRevId' );
 888                         $this->starttime = $request->getVal( 'wpStarttime' );
 889
 890                         $undidRev = $request->getInt( 'wpUndidRevision' );
 891                         if ( $undidRev ) {
 892                                 $this->undidRev = $undidRev;
 893                         }
 894
 895                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 896
 897                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 898                                 // wpTextbox1 field is missing, possibly due to being "too big"
 899                                 // according to some filter rules such as Suhosin's setting for
 900                                 // suhosin.request.max_value_length (d'oh)
 901                                 $this->incompleteForm = true;
 902                         } else {
 903                                 // If we receive the last parameter of the request, we can fairly
 904                                 // claim the POST request has not been truncated.
 905
 906                                 // TODO: softened the check for cutover.  Once we determine
 907                                 // that it is safe, we should complete the transition by
 908                                 // removing the "edittime" clause.
 909                                 $this->incompleteForm = ( !$request->getVal( 'wpUltimateParam' )
 910                                         && is_null( $this->edittime ) );
 911                         }
 912                         if ( $this->incompleteForm ) {
 913                                 # If the form is incomplete, force to preview.
 914                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 915                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 916                                 $this->preview = true;
 917                         } else {
 918                                 $this->preview = $request->getCheck( 'wpPreview' );
 919                                 $this->diff = $request->getCheck( 'wpDiff' );
 920
 921                                 // Remember whether a save was requested, so we can indicate
 922                                 // if we forced preview due to session failure.
 923                                 $this->mTriedSave = !$this->preview;
 924
 925                                 if ( $this->tokenOk( $request ) ) {
 926                                         # Some browsers will not report any submit button
 927                                         # if the user hits enter in the comment box.
 928                                         # The unmarked state will be assumed to be a save,
 929                                         # if the form seems otherwise complete.
 930                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 931                                 } elseif ( $this->diff ) {
 932                                         # Failed token check, but only requested "Show Changes".
 933                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 934                                 } else {
 935                                         # Page might be a hack attempt posted from
 936                                         # an external site. Preview instead of saving.
 937                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 938                                         $this->preview = true;
 939                                 }
 940                         }
 941                         $this->save = !$this->preview && !$this->diff;
 942                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 943                                 $this->edittime = null;
 944                         }
 945
 946                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 947                                 $this->starttime = null;
 948                         }
 949
 950                         $this->recreate = $request->getCheck( 'wpRecreate' );
 951
 952                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 953                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 954
 955                         # Don't force edit summaries when a user is editing their own user or talk page
 956                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 957                                 && $this->mTitle->getText() == $wgUser->getName()
 958                         ) {
 959                                 $this->allowBlankSummary = true;
 960                         } else {
 961                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
 962                                         || !$wgUser->getOption( 'forceeditsummary' );
 963                         }
 964
 965                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 966
 967                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
 968                         $this->allowSelfRedirect = $request->getBool( 'wpIgnoreSelfRedirect' );
 969
 970                         $changeTags = $request->getVal( 'wpChangeTags' );
 971                         if ( is_null( $changeTags ) || $changeTags === '' ) {
 972                                 $this->changeTags = [];
 973                         } else {
 974                                 $this->changeTags = array_filter( array_map( 'trim', explode( ',',
 975                                         $changeTags ) ) );
 976                         }
 977                 } else {
 978                         # Not a posted form? Start with nothing.
 979                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 980                         $this->textbox1 = '';
 981                         $this->summary = '';
 982                         $this->sectiontitle = '';
 983                         $this->edittime = '';
 984                         $this->editRevId = null;
 985                         $this->starttime = wfTimestampNow();
 986                         $this->edit = false;
 987                         $this->preview = false;
 988                         $this->save = false;
 989                         $this->diff = false;
 990                         $this->minoredit = false;
 991                         // Watch may be overridden by request parameters
 992                         $this->watchthis = $request->getBool( 'watchthis', false );
 993                         $this->recreate = false;
 994
 995                         // When creating a new section, we can preload a section title by passing it as the
 996                         // preloadtitle parameter in the URL (Bug 13100)
 997                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 998                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 999                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
1000                                 $this->summary = $request->getVal( 'preloadtitle' );
1001                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
1002                                 $this->summary = $request->getText( 'summary' );
1003                                 if ( $this->summary !== '' ) {
1004                                         $this->hasPresetSummary = true;
1005                                 }
1006                         }
1007
1008                         if ( $request->getVal( 'minor' ) ) {
1009                                 $this->minoredit = true;
1010                         }
1011                 }
1012
1013                 $this->oldid = $request->getInt( 'oldid' );
1014                 $this->parentRevId = $request->getInt( 'parentRevId' );
1015
1016                 $this->bot = $request->getBool( 'bot', true );
1017                 $this->nosummary = $request->getBool( 'nosummary' );
1018
1019                 // May be overridden by revision.
1020                 $this->contentModel = $request->getText( 'model', $this->contentModel );
1021                 // May be overridden by revision.
1022                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
1023
1024                 try {
1025                         $handler = ContentHandler::getForModelID( $this->contentModel );
1026                 } catch ( MWUnknownContentModelException $e ) {
1027                         throw new ErrorPageError(
1028                                 'editpage-invalidcontentmodel-title',
1029                                 'editpage-invalidcontentmodel-text',
1030                                 [ $this->contentModel ]
1031                         );
1032                 }
1033
1034                 if ( !$handler->isSupportedFormat( $this->contentFormat ) ) {
1035                         throw new ErrorPageError(
1036                                 'editpage-notsupportedcontentformat-title',
1037                                 'editpage-notsupportedcontentformat-text',
1038                                 [ $this->contentFormat, ContentHandler::getLocalizedName( $this->contentModel ) ]
1039                         );
1040                 }
1041
1042                 /**
1043                  * @todo Check if the desired model is allowed in this namespace, and if
1044                  *   a transition from the page's current model to the new model is
1045                  *   allowed.
1046                  */
1047
1048                 $this->editintro = $request->getText( 'editintro',
1049                         // Custom edit intro for new sections
1050                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
1051
1052                 // Allow extensions to modify form data
1053                 Hooks::run( 'EditPage::importFormData', [ $this, $request ] );
1054         }
1055
1056         /**
1057          * Subpage overridable method for extracting the page content data from the
1058          * posted form to be placed in $this->textbox1, if using customized input
1059          * this method should be overridden and return the page text that will be used
1060          * for saving, preview parsing and so on...
1061          *
1062          * @param WebRequest $request
1063          * @return string|null
1064          */
1065         protected function importContentFormData( &$request ) {
1066                 return; // Don't do anything, EditPage already extracted wpTextbox1
1067         }
1068
1069         /**
1070          * Initialise form fields in the object
1071          * Called on the first invocation, e.g. when a user clicks an edit link
1072          * @return bool If the requested section is valid
1073          */
1074         function initialiseForm() {
1075                 global $wgUser;
1076                 $this->edittime = $this->page->getTimestamp();
1077                 $this->editRevId = $this->page->getLatest();
1078
1079                 $content = $this->getContentObject( false ); # TODO: track content object?!
1080                 if ( $content === false ) {
1081                         return false;
1082                 }
1083                 $this->textbox1 = $this->toEditText( $content );
1084
1085                 // activate checkboxes if user wants them to be always active
1086                 # Sort out the "watch" checkbox
1087                 if ( $wgUser->getOption( 'watchdefault' ) ) {
1088                         # Watch all edits
1089                         $this->watchthis = true;
1090                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1091                         # Watch creations
1092                         $this->watchthis = true;
1093                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
1094                         # Already watched
1095                         $this->watchthis = true;
1096                 }
1097                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
1098                         $this->minoredit = true;
1099                 }
1100                 if ( $this->textbox1 === false ) {
1101                         return false;
1102                 }
1103                 return true;
1104         }
1105
1106         /**
1107          * @param Content|null $def_content The default value to return
1108          *
1109          * @return Content|null Content on success, $def_content for invalid sections
1110          *
1111          * @since 1.21
1112          */
1113         protected function getContentObject( $def_content = null ) {
1114                 global $wgOut, $wgRequest, $wgUser, $wgContLang;
1115
1116                 $content = false;
1117
1118                 // For message page not locally set, use the i18n message.
1119                 // For other non-existent articles, use preload text if any.
1120                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
1121                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
1122                                 # If this is a system message, get the default text.
1123                                 $msg = $this->mTitle->getDefaultMessageText();
1124
1125                                 $content = $this->toEditContent( $msg );
1126                         }
1127                         if ( $content === false ) {
1128                                 # If requested, preload some text.
1129                                 $preload = $wgRequest->getVal( 'preload',
1130                                         // Custom preload text for new sections
1131                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1132                                 $params = $wgRequest->getArray( 'preloadparams', [] );
1133
1134                                 $content = $this->getPreloadedContent( $preload, $params );
1135                         }
1136                 // For existing pages, get text based on "undo" or section parameters.
1137                 } else {
1138                         if ( $this->section != '' ) {
1139                                 // Get section edit text (returns $def_text for invalid sections)
1140                                 $orig = $this->getOriginalContent( $wgUser );
1141                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1142
1143                                 if ( !$content ) {
1144                                         $content = $def_content;
1145                                 }
1146                         } else {
1147                                 $undoafter = $wgRequest->getInt( 'undoafter' );
1148                                 $undo = $wgRequest->getInt( 'undo' );
1149
1150                                 if ( $undo > 0 && $undoafter > 0 ) {
1151                                         $undorev = Revision::newFromId( $undo );
1152                                         $oldrev = Revision::newFromId( $undoafter );
1153
1154                                         # Sanity check, make sure it's the right page,
1155                                         # the revisions exist and they were not deleted.
1156                                         # Otherwise, $content will be left as-is.
1157                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1158                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1159                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT )
1160                                         ) {
1161                                                 $content = $this->page->getUndoContent( $undorev, $oldrev );
1162
1163                                                 if ( $content === false ) {
1164                                                         # Warn the user that something went wrong
1165                                                         $undoMsg = 'failure';
1166                                                 } else {
1167                                                         $oldContent = $this->page->getContent( Revision::RAW );
1168                                                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
1169                                                         $newContent = $content->preSaveTransform( $this->mTitle, $wgUser, $popts );
1170                                                         if ( $newContent->getModel() !== $oldContent->getModel() ) {
1171                                                                 // The undo may change content
1172                                                                 // model if its reverting the top
1173                                                                 // edit. This can result in
1174                                                                 // mismatched content model/format.
1175                                                                 $this->contentModel = $newContent->getModel();
1176                                                                 $this->contentFormat = $oldrev->getContentFormat();
1177                                                         }
1178
1179                                                         if ( $newContent->equals( $oldContent ) ) {
1180                                                                 # Tell the user that the undo results in no change,
1181                                                                 # i.e. the revisions were already undone.
1182                                                                 $undoMsg = 'nochange';
1183                                                                 $content = false;
1184                                                         } else {
1185                                                                 # Inform the user of our success and set an automatic edit summary
1186                                                                 $undoMsg = 'success';
1187
1188                                                                 # If we just undid one rev, use an autosummary
1189                                                                 $firstrev = $oldrev->getNext();
1190                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1191                                                                         $userText = $undorev->getUserText();
1192                                                                         if ( $userText === '' ) {
1193                                                                                 $undoSummary = $this->context->msg(
1194                                                                                         'undo-summary-username-hidden',
1195                                                                                         $undo
1196                                                                                 )->inContentLanguage()->text();
1197                                                                         } else {
1198                                                                                 $undoSummary = $this->context->msg(
1199                                                                                         'undo-summary',
1200                                                                                         $undo,
1201                                                                                         $userText
1202                                                                                 )->inContentLanguage()->text();
1203                                                                         }
1204                                                                         if ( $this->summary === '' ) {
1205                                                                                 $this->summary = $undoSummary;
1206                                                                         } else {
1207                                                                                 $this->summary = $undoSummary . $this->context->msg( 'colon-separator' )
1208                                                                                         ->inContentLanguage()->text() . $this->summary;
1209                                                                         }
1210                                                                         $this->undidRev = $undo;
1211                                                                 }
1212                                                                 $this->formtype = 'diff';
1213                                                         }
1214                                                 }
1215                                         } else {
1216                                                 // Failed basic sanity checks.
1217                                                 // Older revisions may have been removed since the link
1218                                                 // was created, or we may simply have got bogus input.
1219                                                 $undoMsg = 'norev';
1220                                         }
1221
1222                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1223                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1224                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
1225                                                 $this->context->msg( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1226                                 }
1227
1228                                 if ( $content === false ) {
1229                                         $content = $this->getOriginalContent( $wgUser );
1230                                 }
1231                         }
1232                 }
1233
1234                 return $content;
1235         }
1236
1237         /**
1238          * Get the content of the wanted revision, without section extraction.
1239          *
1240          * The result of this function can be used to compare user's input with
1241          * section replaced in its context (using WikiPage::replaceSectionAtRev())
1242          * to the original text of the edit.
1243          *
1244          * This differs from Article::getContent() that when a missing revision is
1245          * encountered the result will be null and not the
1246          * 'missing-revision' message.
1247          *
1248          * @since 1.19
1249          * @param User $user The user to get the revision for
1250          * @return Content|null
1251          */
1252         private function getOriginalContent( User $user ) {
1253                 if ( $this->section == 'new' ) {
1254                         return $this->getCurrentContent();
1255                 }
1256                 $revision = $this->mArticle->getRevisionFetched();
1257                 if ( $revision === null ) {
1258                         if ( !$this->contentModel ) {
1259                                 $this->contentModel = $this->getTitle()->getContentModel();
1260                         }
1261                         $handler = ContentHandler::getForModelID( $this->contentModel );
1262
1263                         return $handler->makeEmptyContent();
1264                 }
1265                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1266                 return $content;
1267         }
1268
1269         /**
1270          * Get the edit's parent revision ID
1271          *
1272          * The "parent" revision is the ancestor that should be recorded in this
1273          * page's revision history.  It is either the revision ID of the in-memory
1274          * article content, or in the case of a 3-way merge in order to rebase
1275          * across a recoverable edit conflict, the ID of the newer revision to
1276          * which we have rebased this page.
1277          *
1278          * @since 1.27
1279          * @return int Revision ID
1280          */
1281         public function getParentRevId() {
1282                 if ( $this->parentRevId ) {
1283                         return $this->parentRevId;
1284                 } else {
1285                         return $this->mArticle->getRevIdFetched();
1286                 }
1287         }
1288
1289         /**
1290          * Get the current content of the page. This is basically similar to
1291          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1292          * content object is returned instead of null.
1293          *
1294          * @since 1.21
1295          * @return Content
1296          */
1297         protected function getCurrentContent() {
1298                 $rev = $this->page->getRevision();
1299                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1300
1301                 if ( $content === false || $content === null ) {
1302                         if ( !$this->contentModel ) {
1303                                 $this->contentModel = $this->getTitle()->getContentModel();
1304                         }
1305                         $handler = ContentHandler::getForModelID( $this->contentModel );
1306
1307                         return $handler->makeEmptyContent();
1308                 } elseif ( !$this->undidRev ) {
1309                         // Content models should always be the same since we error
1310                         // out if they are different before this point (in ->edit()).
1311                         // The exception being, during an undo, the current revision might
1312                         // differ from the prior revision.
1313                         $logger = LoggerFactory::getInstance( 'editpage' );
1314                         if ( $this->contentModel !== $rev->getContentModel() ) {
1315                                 $logger->warning( "Overriding content model from current edit {prev} to {new}", [
1316                                         'prev' => $this->contentModel,
1317                                         'new' => $rev->getContentModel(),
1318                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1319                                         'method' => __METHOD__
1320                                 ] );
1321                                 $this->contentModel = $rev->getContentModel();
1322                         }
1323
1324                         // Given that the content models should match, the current selected
1325                         // format should be supported.
1326                         if ( !$content->isSupportedFormat( $this->contentFormat ) ) {
1327                                 $logger->warning( "Current revision content format unsupported. Overriding {prev} to {new}", [
1328
1329                                         'prev' => $this->contentFormat,
1330                                         'new' => $rev->getContentFormat(),
1331                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1332                                         'method' => __METHOD__
1333                                 ] );
1334                                 $this->contentFormat = $rev->getContentFormat();
1335                         }
1336                 }
1337                 return $content;
1338         }
1339
1340         /**
1341          * Use this method before edit() to preload some content into the edit box
1342          *
1343          * @param Content $content
1344          *
1345          * @since 1.21
1346          */
1347         public function setPreloadedContent( Content $content ) {
1348                 $this->mPreloadContent = $content;
1349         }
1350
1351         /**
1352          * Get the contents to be preloaded into the box, either set by
1353          * an earlier setPreloadText() or by loading the given page.
1354          *
1355          * @param string $preload Representing the title to preload from.
1356          * @param array $params Parameters to use (interface-message style) in the preloaded text
1357          *
1358          * @return Content
1359          *
1360          * @since 1.21
1361          */
1362         protected function getPreloadedContent( $preload, $params = [] ) {
1363                 global $wgUser;
1364
1365                 if ( !empty( $this->mPreloadContent ) ) {
1366                         return $this->mPreloadContent;
1367                 }
1368
1369                 $handler = ContentHandler::getForModelID( $this->contentModel );
1370
1371                 if ( $preload === '' ) {
1372                         return $handler->makeEmptyContent();
1373                 }
1374
1375                 $title = Title::newFromText( $preload );
1376                 # Check for existence to avoid getting MediaWiki:Noarticletext
1377                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1378                         // TODO: somehow show a warning to the user!
1379                         return $handler->makeEmptyContent();
1380                 }
1381
1382                 $page = WikiPage::factory( $title );
1383                 if ( $page->isRedirect() ) {
1384                         $title = $page->getRedirectTarget();
1385                         # Same as before
1386                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1387                                 // TODO: somehow show a warning to the user!
1388                                 return $handler->makeEmptyContent();
1389                         }
1390                         $page = WikiPage::factory( $title );
1391                 }
1392
1393                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1394                 $content = $page->getContent( Revision::RAW );
1395
1396                 if ( !$content ) {
1397                         // TODO: somehow show a warning to the user!
1398                         return $handler->makeEmptyContent();
1399                 }
1400
1401                 if ( $content->getModel() !== $handler->getModelID() ) {
1402                         $converted = $content->convert( $handler->getModelID() );
1403
1404                         if ( !$converted ) {
1405                                 // TODO: somehow show a warning to the user!
1406                                 wfDebug( "Attempt to preload incompatible content: " .
1407                                         "can't convert " . $content->getModel() .
1408                                         " to " . $handler->getModelID() );
1409
1410                                 return $handler->makeEmptyContent();
1411                         }
1412
1413                         $content = $converted;
1414                 }
1415
1416                 return $content->preloadTransform( $title, $parserOptions, $params );
1417         }
1418
1419         /**
1420          * Make sure the form isn't faking a user's credentials.
1421          *
1422          * @param WebRequest $request
1423          * @return bool
1424          * @private
1425          */
1426         function tokenOk( &$request ) {
1427                 global $wgUser;
1428                 $token = $request->getVal( 'wpEditToken' );
1429                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1430                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1431                 return $this->mTokenOk;
1432         }
1433
1434         /**
1435          * Sets post-edit cookie indicating the user just saved a particular revision.
1436          *
1437          * This uses a temporary cookie for each revision ID so separate saves will never
1438          * interfere with each other.
1439          *
1440          * The cookie is deleted in the mediawiki.action.view.postEdit JS module after
1441          * the redirect.  It must be clearable by JavaScript code, so it must not be
1442          * marked HttpOnly. The JavaScript code converts the cookie to a wgPostEdit config
1443          * variable.
1444          *
1445          * If the variable were set on the server, it would be cached, which is unwanted
1446          * since the post-edit state should only apply to the load right after the save.
1447          *
1448          * @param int $statusValue The status value (to check for new article status)
1449          */
1450         protected function setPostEditCookie( $statusValue ) {
1451                 $revisionId = $this->page->getLatest();
1452                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1453
1454                 $val = 'saved';
1455                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1456                         $val = 'created';
1457                 } elseif ( $this->oldid ) {
1458                         $val = 'restored';
1459                 }
1460
1461                 $response = RequestContext::getMain()->getRequest()->response();
1462                 $response->setCookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION, [
1463                         'httpOnly' => false,
1464                 ] );
1465         }
1466
1467         /**
1468          * Attempt submission
1469          * @param array|bool $resultDetails See docs for $result in internalAttemptSave
1470          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1471          * @return Status The resulting status object.
1472          */
1473         public function attemptSave( &$resultDetails = false ) {
1474                 global $wgUser;
1475
1476                 # Allow bots to exempt some edits from bot flagging
1477                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1478                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1479
1480                 Hooks::run( 'EditPage::attemptSave:after', [ $this, $status, $resultDetails ] );
1481
1482                 return $status;
1483         }
1484
1485         /**
1486          * Handle status, such as after attempt save
1487          *
1488          * @param Status $status
1489          * @param array|bool $resultDetails
1490          *
1491          * @throws ErrorPageError
1492          * @return bool False, if output is done, true if rest of the form should be displayed
1493          */
1494         private function handleStatus( Status $status, $resultDetails ) {
1495                 global $wgUser, $wgOut;
1496
1497                 /**
1498                  * @todo FIXME: once the interface for internalAttemptSave() is made
1499                  *   nicer, this should use the message in $status
1500                  */
1501                 if ( $status->value == self::AS_SUCCESS_UPDATE
1502                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1503                 ) {
1504                         $this->didSave = true;
1505                         if ( !$resultDetails['nullEdit'] ) {
1506                                 $this->setPostEditCookie( $status->value );
1507                         }
1508                 }
1509
1510                 // "wpExtraQueryRedirect" is a hidden input to modify
1511                 // after save URL and is not used by actual edit form
1512                 $request = RequestContext::getMain()->getRequest();
1513                 $extraQueryRedirect = $request->getVal( 'wpExtraQueryRedirect' );
1514
1515                 switch ( $status->value ) {
1516                         case self::AS_HOOK_ERROR_EXPECTED:
1517                         case self::AS_CONTENT_TOO_BIG:
1518                         case self::AS_ARTICLE_WAS_DELETED:
1519                         case self::AS_CONFLICT_DETECTED:
1520                         case self::AS_SUMMARY_NEEDED:
1521                         case self::AS_TEXTBOX_EMPTY:
1522                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1523                         case self::AS_END:
1524                         case self::AS_BLANK_ARTICLE:
1525                         case self::AS_SELF_REDIRECT:
1526                                 return true;
1527
1528                         case self::AS_HOOK_ERROR:
1529                                 return false;
1530
1531                         case self::AS_CANNOT_USE_CUSTOM_MODEL:
1532                         case self::AS_PARSE_ERROR:
1533                                 $wgOut->addWikiText( '<div class="error">' . "\n" . $status->getWikiText() . '</div>' );
1534                                 return true;
1535
1536                         case self::AS_SUCCESS_NEW_ARTICLE:
1537                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1538                                 if ( $extraQueryRedirect ) {
1539                                         if ( $query === '' ) {
1540                                                 $query = $extraQueryRedirect;
1541                                         } else {
1542                                                 $query = $query . '&' . $extraQueryRedirect;
1543                                         }
1544                                 }
1545                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1546                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1547                                 return false;
1548
1549                         case self::AS_SUCCESS_UPDATE:
1550                                 $extraQuery = '';
1551                                 $sectionanchor = $resultDetails['sectionanchor'];
1552
1553                                 // Give extensions a chance to modify URL query on update
1554                                 Hooks::run(
1555                                         'ArticleUpdateBeforeRedirect',
1556                                         [ $this->mArticle, &$sectionanchor, &$extraQuery ]
1557                                 );
1558
1559                                 if ( $resultDetails['redirect'] ) {
1560                                         if ( $extraQuery == '' ) {
1561                                                 $extraQuery = 'redirect=no';
1562                                         } else {
1563                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1564                                         }
1565                                 }
1566                                 if ( $extraQueryRedirect ) {
1567                                         if ( $extraQuery === '' ) {
1568                                                 $extraQuery = $extraQueryRedirect;
1569                                         } else {
1570                                                 $extraQuery = $extraQuery . '&' . $extraQueryRedirect;
1571                                         }
1572                                 }
1573
1574                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1575                                 return false;
1576
1577                         case self::AS_SPAM_ERROR:
1578                                 $this->spamPageWithContent( $resultDetails['spam'] );
1579                                 return false;
1580
1581                         case self::AS_BLOCKED_PAGE_FOR_USER:
1582                                 throw new UserBlockedError( $wgUser->getBlock() );
1583
1584                         case self::AS_IMAGE_REDIRECT_ANON:
1585                         case self::AS_IMAGE_REDIRECT_LOGGED:
1586                                 throw new PermissionsError( 'upload' );
1587
1588                         case self::AS_READ_ONLY_PAGE_ANON:
1589                         case self::AS_READ_ONLY_PAGE_LOGGED:
1590                                 throw new PermissionsError( 'edit' );
1591
1592                         case self::AS_READ_ONLY_PAGE:
1593                                 throw new ReadOnlyError;
1594
1595                         case self::AS_RATE_LIMITED:
1596                                 throw new ThrottledError();
1597
1598                         case self::AS_NO_CREATE_PERMISSION:
1599                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1600                                 throw new PermissionsError( $permission );
1601
1602                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1603                                 throw new PermissionsError( 'editcontentmodel' );
1604
1605                         default:
1606                                 // We don't recognize $status->value. The only way that can happen
1607                                 // is if an extension hook aborted from inside ArticleSave.
1608                                 // Render the status object into $this->hookError
1609                                 // FIXME this sucks, we should just use the Status object throughout
1610                                 $this->hookError = '<div class="error">' ."\n" . $status->getWikiText() .
1611                                         '</div>';
1612                                 return true;
1613                 }
1614         }
1615
1616         /**
1617          * Run hooks that can filter edits just before they get saved.
1618          *
1619          * @param Content $content The Content to filter.
1620          * @param Status $status For reporting the outcome to the caller
1621          * @param User $user The user performing the edit
1622          *
1623          * @return bool
1624          */
1625         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1626                 // Run old style post-section-merge edit filter
1627                 if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged',
1628                         [ $this, $content, &$this->hookError, $this->summary ],
1629                         '1.21'
1630                 ) ) {
1631                         # Error messages etc. could be handled within the hook...
1632                         $status->fatal( 'hookaborted' );
1633                         $status->value = self::AS_HOOK_ERROR;
1634                         return false;
1635                 } elseif ( $this->hookError != '' ) {
1636                         # ...or the hook could be expecting us to produce an error
1637                         $status->fatal( 'hookaborted' );
1638                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1639                         return false;
1640                 }
1641
1642                 // Run new style post-section-merge edit filter
1643                 if ( !Hooks::run( 'EditFilterMergedContent',
1644                                 [ $this->mArticle->getContext(), $content, $status, $this->summary,
1645                                 $user, $this->minoredit ] )
1646                 ) {
1647                         # Error messages etc. could be handled within the hook...
1648                         if ( $status->isGood() ) {
1649                                 $status->fatal( 'hookaborted' );
1650                                 // Not setting $this->hookError here is a hack to allow the hook
1651                                 // to cause a return to the edit page without $this->hookError
1652                                 // being set. This is used by ConfirmEdit to display a captcha
1653                                 // without any error message cruft.
1654                         } else {
1655                                 $this->hookError = $status->getWikiText();
1656                         }
1657                         // Use the existing $status->value if the hook set it
1658                         if ( !$status->value ) {
1659                                 $status->value = self::AS_HOOK_ERROR;
1660                         }
1661                         return false;
1662                 } elseif ( !$status->isOK() ) {
1663                         # ...or the hook could be expecting us to produce an error
1664                         // FIXME this sucks, we should just use the Status object throughout
1665                         $this->hookError = $status->getWikiText();
1666                         $status->fatal( 'hookaborted' );
1667                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1668                         return false;
1669                 }
1670
1671                 return true;
1672         }
1673
1674         /**
1675          * Return the summary to be used for a new section.
1676          *
1677          * @param string $sectionanchor Set to the section anchor text
1678          * @return string
1679          */
1680         private function newSectionSummary( &$sectionanchor = null ) {
1681                 global $wgParser;
1682
1683                 if ( $this->sectiontitle !== '' ) {
1684                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1685                         // If no edit summary was specified, create one automatically from the section
1686                         // title and have it link to the new section. Otherwise, respect the summary as
1687                         // passed.
1688                         if ( $this->summary === '' ) {
1689                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1690                                 return $this->context->msg( 'newsectionsummary' )
1691                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1692                         }
1693                 } elseif ( $this->summary !== '' ) {
1694                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1695                         # This is a new section, so create a link to the new section
1696                         # in the revision summary.
1697                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1698                         return $this->context->msg( 'newsectionsummary' )
1699                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1700                 }
1701                 return $this->summary;
1702         }
1703
1704         /**
1705          * Attempt submission (no UI)
1706          *
1707          * @param array $result Array to add statuses to, currently with the
1708          *   possible keys:
1709          *   - spam (string): Spam string from content if any spam is detected by
1710          *     matchSpamRegex.
1711          *   - sectionanchor (string): Section anchor for a section save.
1712          *   - nullEdit (boolean): Set if doEditContent is OK.  True if null edit,
1713          *     false otherwise.
1714          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1715          *     revision is a redirect.
1716          * @param bool $bot True if edit is being made under the bot right.
1717          *
1718          * @return Status Status object, possibly with a message, but always with
1719          *   one of the AS_* constants in $status->value,
1720          *
1721          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1722          *   various error display idiosyncrasies. There are also lots of cases
1723          *   where error metadata is set in the object and retrieved later instead
1724          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1725          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1726          * time.
1727          */
1728         function internalAttemptSave( &$result, $bot = false ) {
1729                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1730                 global $wgContentHandlerUseDB;
1731
1732                 $status = Status::newGood();
1733
1734                 if ( !Hooks::run( 'EditPage::attemptSave', [ $this ] ) ) {
1735                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1736                         $status->fatal( 'hookaborted' );
1737                         $status->value = self::AS_HOOK_ERROR;
1738                         return $status;
1739                 }
1740
1741                 $spam = $wgRequest->getText( 'wpAntispam' );
1742                 if ( $spam !== '' ) {
1743                         wfDebugLog(
1744                                 'SimpleAntiSpam',
1745                                 $wgUser->getName() .
1746                                 ' editing "' .
1747                                 $this->mTitle->getPrefixedText() .
1748                                 '" submitted bogus field "' .
1749                                 $spam .
1750                                 '"'
1751                         );
1752                         $status->fatal( 'spamprotectionmatch', false );
1753                         $status->value = self::AS_SPAM_ERROR;
1754                         return $status;
1755                 }
1756
1757                 try {
1758                         # Construct Content object
1759                         $textbox_content = $this->toEditContent( $this->textbox1 );
1760                 } catch ( MWContentSerializationException $ex ) {
1761                         $status->fatal(
1762                                 'content-failed-to-parse',
1763                                 $this->contentModel,
1764                                 $this->contentFormat,
1765                                 $ex->getMessage()
1766                         );
1767                         $status->value = self::AS_PARSE_ERROR;
1768                         return $status;
1769                 }
1770
1771                 # Check image redirect
1772                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1773                         $textbox_content->isRedirect() &&
1774                         !$wgUser->isAllowed( 'upload' )
1775                 ) {
1776                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1777                                 $status->setResult( false, $code );
1778
1779                                 return $status;
1780                 }
1781
1782                 # Check for spam
1783                 $match = self::matchSummarySpamRegex( $this->summary );
1784                 if ( $match === false && $this->section == 'new' ) {
1785                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1786                         # regular summaries, it is added to the actual wikitext.
1787                         if ( $this->sectiontitle !== '' ) {
1788                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1789                                 $match = self::matchSpamRegex( $this->sectiontitle );
1790                         } else {
1791                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1792                                 # is used with the 'summary' parameter.
1793                                 $match = self::matchSpamRegex( $this->summary );
1794                         }
1795                 }
1796                 if ( $match === false ) {
1797                         $match = self::matchSpamRegex( $this->textbox1 );
1798                 }
1799                 if ( $match !== false ) {
1800                         $result['spam'] = $match;
1801                         $ip = $wgRequest->getIP();
1802                         $pdbk = $this->mTitle->getPrefixedDBkey();
1803                         $match = str_replace( "\n", '', $match );
1804                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1805                         $status->fatal( 'spamprotectionmatch', $match );
1806                         $status->value = self::AS_SPAM_ERROR;
1807                         return $status;
1808                 }
1809                 if ( !Hooks::run(
1810                         'EditFilter',
1811                         [ $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ] )
1812                 ) {
1813                         # Error messages etc. could be handled within the hook...
1814                         $status->fatal( 'hookaborted' );
1815                         $status->value = self::AS_HOOK_ERROR;
1816                         return $status;
1817                 } elseif ( $this->hookError != '' ) {
1818                         # ...or the hook could be expecting us to produce an error
1819                         $status->fatal( 'hookaborted' );
1820                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1821                         return $status;
1822                 }
1823
1824                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1825                         // Auto-block user's IP if the account was "hard" blocked
1826                         if ( !wfReadOnly() ) {
1827                                 $wgUser->spreadAnyEditBlock();
1828                         }
1829                         # Check block state against master, thus 'false'.
1830                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1831                         return $status;
1832                 }
1833
1834                 $this->contentLength = strlen( $this->textbox1 );
1835                 if ( $this->contentLength > $wgMaxArticleSize * 1024 ) {
1836                         // Error will be displayed by showEditForm()
1837                         $this->tooBig = true;
1838                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1839                         return $status;
1840                 }
1841
1842                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1843                         if ( $wgUser->isAnon() ) {
1844                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1845                                 return $status;
1846                         } else {
1847                                 $status->fatal( 'readonlytext' );
1848                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1849                                 return $status;
1850                         }
1851                 }
1852
1853                 $changingContentModel = false;
1854                 if ( $this->contentModel !== $this->mTitle->getContentModel() ) {
1855                         if ( !$wgContentHandlerUseDB ) {
1856                                 $status->fatal( 'editpage-cannot-use-custom-model' );
1857                                 $status->value = self::AS_CANNOT_USE_CUSTOM_MODEL;
1858                                 return $status;
1859                         } elseif ( !$wgUser->isAllowed( 'editcontentmodel' ) ) {
1860                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1861                                 return $status;
1862                         }
1863                         // Make sure the user can edit the page under the new content model too
1864                         $titleWithNewContentModel = clone $this->mTitle;
1865                         $titleWithNewContentModel->setContentModel( $this->contentModel );
1866                         if ( !$titleWithNewContentModel->userCan( 'editcontentmodel', $wgUser )
1867                                 || !$titleWithNewContentModel->userCan( 'edit', $wgUser )
1868                         ) {
1869                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1870                                 return $status;
1871                         }
1872
1873                         $changingContentModel = true;
1874                         $oldContentModel = $this->mTitle->getContentModel();
1875                 }
1876
1877                 if ( $this->changeTags ) {
1878                         $changeTagsStatus = ChangeTags::canAddTagsAccompanyingChange(
1879                                 $this->changeTags, $wgUser );
1880                         if ( !$changeTagsStatus->isOK() ) {
1881                                 $changeTagsStatus->value = self::AS_CHANGE_TAG_ERROR;
1882                                 return $changeTagsStatus;
1883                         }
1884                 }
1885
1886                 if ( wfReadOnly() ) {
1887                         $status->fatal( 'readonlytext' );
1888                         $status->value = self::AS_READ_ONLY_PAGE;
1889                         return $status;
1890                 }
1891                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 )
1892                         || ( $changingContentModel && $wgUser->pingLimiter( 'editcontentmodel' ) )
1893                 ) {
1894                         $status->fatal( 'actionthrottledtext' );
1895                         $status->value = self::AS_RATE_LIMITED;
1896                         return $status;
1897                 }
1898
1899                 # If the article has been deleted while editing, don't save it without
1900                 # confirmation
1901                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1902                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1903                         return $status;
1904                 }
1905
1906                 # Load the page data from the master. If anything changes in the meantime,
1907                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1908                 $this->page->loadPageData( 'fromdbmaster' );
1909                 $new = !$this->page->exists();
1910
1911                 if ( $new ) {
1912                         // Late check for create permission, just in case *PARANOIA*
1913                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1914                                 $status->fatal( 'nocreatetext' );
1915                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1916                                 wfDebug( __METHOD__ . ": no create permission\n" );
1917                                 return $status;
1918                         }
1919
1920                         // Don't save a new page if it's blank or if it's a MediaWiki:
1921                         // message with content equivalent to default (allow empty pages
1922                         // in this case to disable messages, see bug 50124)
1923                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1924                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1925                                 $defaultText = $defaultMessageText;
1926                         } else {
1927                                 $defaultText = '';
1928                         }
1929
1930                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
1931                                 $this->blankArticle = true;
1932                                 $status->fatal( 'blankarticle' );
1933                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1934                                 return $status;
1935                         }
1936
1937                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1938                                 return $status;
1939                         }
1940
1941                         $content = $textbox_content;
1942
1943                         $result['sectionanchor'] = '';
1944                         if ( $this->section == 'new' ) {
1945                                 if ( $this->sectiontitle !== '' ) {
1946                                         // Insert the section title above the content.
1947                                         $content = $content->addSectionHeader( $this->sectiontitle );
1948                                 } elseif ( $this->summary !== '' ) {
1949                                         // Insert the section title above the content.
1950                                         $content = $content->addSectionHeader( $this->summary );
1951                                 }
1952                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
1953                         }
1954
1955                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1956
1957                 } else { # not $new
1958
1959                         # Article exists. Check for edit conflict.
1960
1961                         $this->page->clear(); # Force reload of dates, etc.
1962                         $timestamp = $this->page->getTimestamp();
1963                         $latest = $this->page->getLatest();
1964
1965                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1966
1967                         // Check editRevId if set, which handles same-second timestamp collisions
1968                         if ( $timestamp != $this->edittime
1969                                 || ( $this->editRevId !== null && $this->editRevId != $latest )
1970                         ) {
1971                                 $this->isConflict = true;
1972                                 if ( $this->section == 'new' ) {
1973                                         if ( $this->page->getUserText() == $wgUser->getName() &&
1974                                                 $this->page->getComment() == $this->newSectionSummary()
1975                                         ) {
1976                                                 // Probably a duplicate submission of a new comment.
1977                                                 // This can happen when CDN resends a request after
1978                                                 // a timeout but the first one actually went through.
1979                                                 wfDebug( __METHOD__
1980                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
1981                                         } else {
1982                                                 // New comment; suppress conflict.
1983                                                 $this->isConflict = false;
1984                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1985                                         }
1986                                 } elseif ( $this->section == ''
1987                                         && Revision::userWasLastToEdit(
1988                                                 DB_MASTER, $this->mTitle->getArticleID(),
1989                                                 $wgUser->getId(), $this->edittime
1990                                         )
1991                                 ) {
1992                                         # Suppress edit conflict with self, except for section edits where merging is required.
1993                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1994                                         $this->isConflict = false;
1995                                 }
1996                         }
1997
1998                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
1999                         if ( $this->sectiontitle !== '' ) {
2000                                 $sectionTitle = $this->sectiontitle;
2001                         } else {
2002                                 $sectionTitle = $this->summary;
2003                         }
2004
2005                         $content = null;
2006
2007                         if ( $this->isConflict ) {
2008                                 wfDebug( __METHOD__
2009                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
2010                                         . " (id '{$this->editRevId}') (article time '{$timestamp}')\n" );
2011                                 // @TODO: replaceSectionAtRev() with base ID (not prior current) for ?oldid=X case
2012                                 // ...or disable section editing for non-current revisions (not exposed anyway).
2013                                 if ( $this->editRevId !== null ) {
2014                                         $content = $this->page->replaceSectionAtRev(
2015                                                 $this->section,
2016                                                 $textbox_content,
2017                                                 $sectionTitle,
2018                                                 $this->editRevId
2019                                         );
2020                                 } else {
2021                                         $content = $this->page->replaceSectionContent(
2022                                                 $this->section,
2023                                                 $textbox_content,
2024                                                 $sectionTitle,
2025                                                 $this->edittime
2026                                         );
2027                                 }
2028                         } else {
2029                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
2030                                 $content = $this->page->replaceSectionContent(
2031                                         $this->section,
2032                                         $textbox_content,
2033                                         $sectionTitle
2034                                 );
2035                         }
2036
2037                         if ( is_null( $content ) ) {
2038                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
2039                                 $this->isConflict = true;
2040                                 $content = $textbox_content; // do not try to merge here!
2041                         } elseif ( $this->isConflict ) {
2042                                 # Attempt merge
2043                                 if ( $this->mergeChangesIntoContent( $content ) ) {
2044                                         // Successful merge! Maybe we should tell the user the good news?
2045                                         $this->isConflict = false;
2046                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
2047                                 } else {
2048                                         $this->section = '';
2049                                         $this->textbox1 = ContentHandler::getContentText( $content );
2050                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
2051                                 }
2052                         }
2053
2054                         if ( $this->isConflict ) {
2055                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
2056                                 return $status;
2057                         }
2058
2059                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
2060                                 return $status;
2061                         }
2062
2063                         if ( $this->section == 'new' ) {
2064                                 // Handle the user preference to force summaries here
2065                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
2066                                         $this->missingSummary = true;
2067                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
2068                                         $status->value = self::AS_SUMMARY_NEEDED;
2069                                         return $status;
2070                                 }
2071
2072                                 // Do not allow the user to post an empty comment
2073                                 if ( $this->textbox1 == '' ) {
2074                                         $this->missingComment = true;
2075                                         $status->fatal( 'missingcommenttext' );
2076                                         $status->value = self::AS_TEXTBOX_EMPTY;
2077                                         return $status;
2078                                 }
2079                         } elseif ( !$this->allowBlankSummary
2080                                 && !$content->equals( $this->getOriginalContent( $wgUser ) )
2081                                 && !$content->isRedirect()
2082                                 && md5( $this->summary ) == $this->autoSumm
2083                         ) {
2084                                 $this->missingSummary = true;
2085                                 $status->fatal( 'missingsummary' );
2086                                 $status->value = self::AS_SUMMARY_NEEDED;
2087                                 return $status;
2088                         }
2089
2090                         # All's well
2091                         $sectionanchor = '';
2092                         if ( $this->section == 'new' ) {
2093                                 $this->summary = $this->newSectionSummary( $sectionanchor );
2094                         } elseif ( $this->section != '' ) {
2095                                 # Try to get a section anchor from the section source, redirect
2096                                 # to edited section if header found.
2097                                 # XXX: Might be better to integrate this into Article::replaceSectionAtRev
2098                                 # for duplicate heading checking and maybe parsing.
2099                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
2100                                 # We can't deal with anchors, includes, html etc in the header for now,
2101                                 # headline would need to be parsed to improve this.
2102                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
2103                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
2104                                 }
2105                         }
2106                         $result['sectionanchor'] = $sectionanchor;
2107
2108                         // Save errors may fall down to the edit form, but we've now
2109                         // merged the section into full text. Clear the section field
2110                         // so that later submission of conflict forms won't try to
2111                         // replace that into a duplicated mess.
2112                         $this->textbox1 = $this->toEditText( $content );
2113                         $this->section = '';
2114
2115                         $status->value = self::AS_SUCCESS_UPDATE;
2116                 }
2117
2118                 if ( !$this->allowSelfRedirect
2119                         && $content->isRedirect()
2120                         && $content->getRedirectTarget()->equals( $this->getTitle() )
2121                 ) {
2122                         // If the page already redirects to itself, don't warn.
2123                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
2124                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
2125                                 $this->selfRedirect = true;
2126                                 $status->fatal( 'selfredirect' );
2127                                 $status->value = self::AS_SELF_REDIRECT;
2128                                 return $status;
2129                         }
2130                 }
2131
2132                 // Check for length errors again now that the section is merged in
2133                 $this->contentLength = strlen( $this->toEditText( $content ) );
2134                 if ( $this->contentLength > $wgMaxArticleSize * 1024 ) {
2135                         $this->tooBig = true;
2136                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
2137                         return $status;
2138                 }
2139
2140                 $flags = EDIT_AUTOSUMMARY |
2141                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
2142                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
2143                         ( $bot ? EDIT_FORCE_BOT : 0 );
2144
2145                 $doEditStatus = $this->page->doEditContent(
2146                         $content,
2147                         $this->summary,
2148                         $flags,
2149                         false,
2150                         $wgUser,
2151                         $content->getDefaultFormat(),
2152                         $this->changeTags,
2153                         $this->undidRev
2154                 );
2155
2156                 if ( !$doEditStatus->isOK() ) {
2157                         // Failure from doEdit()
2158                         // Show the edit conflict page for certain recognized errors from doEdit(),
2159                         // but don't show it for errors from extension hooks
2160                         $errors = $doEditStatus->getErrorsArray();
2161                         if ( in_array( $errors[0][0],
2162                                         [ 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ] )
2163                         ) {
2164                                 $this->isConflict = true;
2165                                 // Destroys data doEdit() put in $status->value but who cares
2166                                 $doEditStatus->value = self::AS_END;
2167                         }
2168                         return $doEditStatus;
2169                 }
2170
2171                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
2172                 if ( $result['nullEdit'] ) {
2173                         // We don't know if it was a null edit until now, so increment here
2174                         $wgUser->pingLimiter( 'linkpurge' );
2175                 }
2176                 $result['redirect'] = $content->isRedirect();
2177
2178                 $this->updateWatchlist();
2179
2180                 // If the content model changed, add a log entry
2181                 if ( $changingContentModel ) {
2182                         $this->addContentModelChangeLogEntry(
2183                                 $wgUser,
2184                                 $new ? false : $oldContentModel,
2185                                 $this->contentModel,
2186                                 $this->summary
2187                         );
2188                 }
2189
2190                 return $status;
2191         }
2192
2193         /**
2194          * @param User $user
2195          * @param string|false $oldModel false if the page is being newly created
2196          * @param string $newModel
2197          * @param string $reason
2198          */
2199         protected function addContentModelChangeLogEntry( User $user, $oldModel, $newModel, $reason ) {
2200                 $new = $oldModel === false;
2201                 $log = new ManualLogEntry( 'contentmodel', $new ? 'new' : 'change' );
2202                 $log->setPerformer( $user );
2203                 $log->setTarget( $this->mTitle );
2204                 $log->setComment( $reason );
2205                 $log->setParameters( [
2206                         '4::oldmodel' => $oldModel,
2207                         '5::newmodel' => $newModel
2208                 ] );
2209                 $logid = $log->insert();
2210                 $log->publish( $logid );
2211         }
2212
2213         /**
2214          * Register the change of watch status
2215          */
2216         protected function updateWatchlist() {
2217                 global $wgUser;
2218
2219                 if ( !$wgUser->isLoggedIn() ) {
2220                         return;
2221                 }
2222
2223                 $user = $wgUser;
2224                 $title = $this->mTitle;
2225                 $watch = $this->watchthis;
2226                 // Do this in its own transaction to reduce contention...
2227                 DeferredUpdates::addCallableUpdate( function () use ( $user, $title, $watch ) {
2228                         if ( $watch == $user->isWatched( $title, User::IGNORE_USER_RIGHTS ) ) {
2229                                 return; // nothing to change
2230                         }
2231                         WatchAction::doWatchOrUnwatch( $watch, $title, $user );
2232                 } );
2233         }
2234
2235         /**
2236          * Attempts to do 3-way merge of edit content with a base revision
2237          * and current content, in case of edit conflict, in whichever way appropriate
2238          * for the content type.
2239          *
2240          * @since 1.21
2241          *
2242          * @param Content $editContent
2243          *
2244          * @return bool
2245          */
2246         private function mergeChangesIntoContent( &$editContent ) {
2247                 $db = wfGetDB( DB_MASTER );
2248
2249                 // This is the revision the editor started from
2250                 $baseRevision = $this->getBaseRevision();
2251                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
2252
2253                 if ( is_null( $baseContent ) ) {
2254                         return false;
2255                 }
2256
2257                 // The current state, we want to merge updates into it
2258                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2259                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2260
2261                 if ( is_null( $currentContent ) ) {
2262                         return false;
2263                 }
2264
2265                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2266
2267                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2268
2269                 if ( $result ) {
2270                         $editContent = $result;
2271                         // Update parentRevId to what we just merged.
2272                         $this->parentRevId = $currentRevision->getId();
2273                         return true;
2274                 }
2275
2276                 return false;
2277         }
2278
2279         /**
2280          * @note: this method is very poorly named. If the user opened the form with ?oldid=X,
2281          *        one might think of X as the "base revision", which is NOT what this returns.
2282          * @return Revision Current version when the edit was started
2283          */
2284         function getBaseRevision() {
2285                 if ( !$this->mBaseRevision ) {
2286                         $db = wfGetDB( DB_MASTER );
2287                         $this->mBaseRevision = $this->editRevId
2288                                 ? Revision::newFromId( $this->editRevId, Revision::READ_LATEST )
2289                                 : Revision::loadFromTimestamp( $db, $this->mTitle, $this->edittime );
2290                 }
2291                 return $this->mBaseRevision;
2292         }
2293
2294         /**
2295          * Check given input text against $wgSpamRegex, and return the text of the first match.
2296          *
2297          * @param string $text
2298          *
2299          * @return string|bool Matching string or false
2300          */
2301         public static function matchSpamRegex( $text ) {
2302                 global $wgSpamRegex;
2303                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2304                 $regexes = (array)$wgSpamRegex;
2305                 return self::matchSpamRegexInternal( $text, $regexes );
2306         }
2307
2308         /**
2309          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2310          *
2311          * @param string $text
2312          *
2313          * @return string|bool Matching string or false
2314          */
2315         public static function matchSummarySpamRegex( $text ) {
2316                 global $wgSummarySpamRegex;
2317                 $regexes = (array)$wgSummarySpamRegex;
2318                 return self::matchSpamRegexInternal( $text, $regexes );
2319         }
2320
2321         /**
2322          * @param string $text
2323          * @param array $regexes
2324          * @return bool|string
2325          */
2326         protected static function matchSpamRegexInternal( $text, $regexes ) {
2327                 foreach ( $regexes as $regex ) {
2328                         $matches = [];
2329                         if ( preg_match( $regex, $text, $matches ) ) {
2330                                 return $matches[0];
2331                         }
2332                 }
2333                 return false;
2334         }
2335
2336         function setHeaders() {
2337                 global $wgOut, $wgUser, $wgAjaxEditStash, $wgCookieSetOnAutoblock;
2338
2339                 $wgOut->addModules( 'mediawiki.action.edit' );
2340                 if ( $wgCookieSetOnAutoblock === true ) {
2341                         $wgOut->addModules( 'mediawiki.user.blockcookie' );
2342                 }
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                         LogEventsList::showLogExtract( $wgOut, [ 'delete', 'move' ], $this->mTitle,
2495                                 '',
2496                                 [
2497                                         'lim' => 10,
2498                                         'conds' => [ "log_action != 'revision'" ],
2499                                         'showIfEmpty' => false,
2500                                         'msgKey' => [ 'recreate-moveddeleted-warn' ]
2501                                 ]
2502                         );
2503                 }
2504         }
2505
2506         /**
2507          * Attempt to show a custom editing introduction, if supplied
2508          *
2509          * @return bool
2510          */
2511         protected function showCustomIntro() {
2512                 if ( $this->editintro ) {
2513                         $title = Title::newFromText( $this->editintro );
2514                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2515                                 global $wgOut;
2516                                 // Added using template syntax, to take <noinclude>'s into account.
2517                                 $wgOut->addWikiTextTitleTidy(
2518                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2519                                         $this->mTitle
2520                                 );
2521                                 return true;
2522                         }
2523                 }
2524                 return false;
2525         }
2526
2527         /**
2528          * Gets an editable textual representation of $content.
2529          * The textual representation can be turned by into a Content object by the
2530          * toEditContent() method.
2531          *
2532          * If $content is null or false or a string, $content is returned unchanged.
2533          *
2534          * If the given Content object is not of a type that can be edited using
2535          * the text base EditPage, an exception will be raised. Set
2536          * $this->allowNonTextContent to true to allow editing of non-textual
2537          * content.
2538          *
2539          * @param Content|null|bool|string $content
2540          * @return string The editable text form of the content.
2541          *
2542          * @throws MWException If $content is not an instance of TextContent and
2543          *   $this->allowNonTextContent is not true.
2544          */
2545         protected function toEditText( $content ) {
2546                 if ( $content === null || $content === false || is_string( $content ) ) {
2547                         return $content;
2548                 }
2549
2550                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2551                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2552                 }
2553
2554                 return $content->serialize( $this->contentFormat );
2555         }
2556
2557         /**
2558          * Turns the given text into a Content object by unserializing it.
2559          *
2560          * If the resulting Content object is not of a type that can be edited using
2561          * the text base EditPage, an exception will be raised. Set
2562          * $this->allowNonTextContent to true to allow editing of non-textual
2563          * content.
2564          *
2565          * @param string|null|bool $text Text to unserialize
2566          * @return Content|bool|null The content object created from $text. If $text was false
2567          *   or null, false resp. null will be  returned instead.
2568          *
2569          * @throws MWException If unserializing the text results in a Content
2570          *   object that is not an instance of TextContent and
2571          *   $this->allowNonTextContent is not true.
2572          */
2573         protected function toEditContent( $text ) {
2574                 if ( $text === false || $text === null ) {
2575                         return $text;
2576                 }
2577
2578                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2579                         $this->contentModel, $this->contentFormat );
2580
2581                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2582                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2583                 }
2584
2585                 return $content;
2586         }
2587
2588         /**
2589          * Send the edit form and related headers to $wgOut
2590          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2591          *     during form output near the top, for captchas and the like.
2592          *
2593          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2594          * use the EditPage::showEditForm:fields hook instead.
2595          */
2596         function showEditForm( $formCallback = null ) {
2597                 global $wgOut, $wgUser;
2598
2599                 # need to parse the preview early so that we know which templates are used,
2600                 # otherwise users with "show preview after edit box" will get a blank list
2601                 # we parse this near the beginning so that setHeaders can do the title
2602                 # setting work instead of leaving it in getPreviewText
2603                 $previewOutput = '';
2604                 if ( $this->formtype == 'preview' ) {
2605                         $previewOutput = $this->getPreviewText();
2606                 }
2607
2608                 // Avoid PHP 7.1 warning of passing $this by reference
2609                 $editPage = $this;
2610                 Hooks::run( 'EditPage::showEditForm:initial', [ &$editPage, &$wgOut ] );
2611
2612                 $this->setHeaders();
2613
2614                 $this->addTalkPageText();
2615                 $this->addEditNotices();
2616
2617                 if ( !$this->isConflict &&
2618                         $this->section != '' &&
2619                         !$this->isSectionEditSupported() ) {
2620                         // We use $this->section to much before this and getVal('wgSection') directly in other places
2621                         // at this point we can't reset $this->section to '' to fallback to non-section editing.
2622                         // Someone is welcome to try refactoring though
2623                         $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2624                         return;
2625                 }
2626
2627                 $this->showHeader();
2628
2629                 $wgOut->addHTML( $this->editFormPageTop );
2630
2631                 if ( $wgUser->getOption( 'previewontop' ) ) {
2632                         $this->displayPreviewArea( $previewOutput, true );
2633                 }
2634
2635                 $wgOut->addHTML( $this->editFormTextTop );
2636
2637                 $showToolbar = true;
2638                 if ( $this->wasDeletedSinceLastEdit() ) {
2639                         if ( $this->formtype == 'save' ) {
2640                                 // Hide the toolbar and edit area, user can click preview to get it back
2641                                 // Add an confirmation checkbox and explanation.
2642                                 $showToolbar = false;
2643                         } else {
2644                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2645                                         'deletedwhileediting' );
2646                         }
2647                 }
2648
2649                 // @todo add EditForm plugin interface and use it here!
2650                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2651                 $wgOut->addHTML( Html::openElement(
2652                         'form',
2653                         [
2654                                 'id' => self::EDITFORM_ID,
2655                                 'name' => self::EDITFORM_ID,
2656                                 'method' => 'post',
2657                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2658                                 'enctype' => 'multipart/form-data'
2659                         ]
2660                 ) );
2661
2662                 if ( is_callable( $formCallback ) ) {
2663                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2664                         call_user_func_array( $formCallback, [ &$wgOut ] );
2665                 }
2666
2667                 // Add an empty field to trip up spambots
2668                 $wgOut->addHTML(
2669                         Xml::openElement( 'div', [ 'id' => 'antispam-container', 'style' => 'display: none;' ] )
2670                         . Html::rawElement(
2671                                 'label',
2672                                 [ 'for' => 'wpAntispam' ],
2673                                 $this->context->msg( 'simpleantispam-label' )->parse()
2674                         )
2675                         . Xml::element(
2676                                 'input',
2677                                 [
2678                                         'type' => 'text',
2679                                         'name' => 'wpAntispam',
2680                                         'id' => 'wpAntispam',
2681                                         'value' => ''
2682                                 ]
2683                         )
2684                         . Xml::closeElement( 'div' )
2685                 );
2686
2687                 // Avoid PHP 7.1 warning of passing $this by reference
2688                 $editPage = $this;
2689                 Hooks::run( 'EditPage::showEditForm:fields', [ &$editPage, &$wgOut ] );
2690
2691                 // Put these up at the top to ensure they aren't lost on early form submission
2692                 $this->showFormBeforeText();
2693
2694                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2695                         $username = $this->lastDelete->user_name;
2696                         $comment = $this->lastDelete->log_comment;
2697
2698                         // It is better to not parse the comment at all than to have templates expanded in the middle
2699                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2700                         $key = $comment === ''
2701                                 ? 'confirmrecreate-noreason'
2702                                 : 'confirmrecreate';
2703                         $wgOut->addHTML(
2704                                 '<div class="mw-confirm-recreate">' .
2705                                         $this->context->msg( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2706                                 Xml::checkLabel( $this->context->msg( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2707                                         [ 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' ]
2708                                 ) .
2709                                 '</div>'
2710                         );
2711                 }
2712
2713                 # When the summary is hidden, also hide them on preview/show changes
2714                 if ( $this->nosummary ) {
2715                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2716                 }
2717
2718                 # If a blank edit summary was previously provided, and the appropriate
2719                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2720                 # user being bounced back more than once in the event that a summary
2721                 # is not required.
2722                 # ####
2723                 # For a bit more sophisticated detection of blank summaries, hash the
2724                 # automatic one and pass that in the hidden field wpAutoSummary.
2725                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2726                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2727                 }
2728
2729                 if ( $this->undidRev ) {
2730                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2731                 }
2732
2733                 if ( $this->selfRedirect ) {
2734                         $wgOut->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2735                 }
2736
2737                 if ( $this->hasPresetSummary ) {
2738                         // If a summary has been preset using &summary= we don't want to prompt for
2739                         // a different summary. Only prompt for a summary if the summary is blanked.
2740                         // (Bug 17416)
2741                         $this->autoSumm = md5( '' );
2742                 }
2743
2744                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2745                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2746
2747                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2748                 $wgOut->addHTML( Html::hidden( 'parentRevId', $this->getParentRevId() ) );
2749
2750                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2751                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2752
2753                 if ( $this->section == 'new' ) {
2754                         $this->showSummaryInput( true, $this->summary );
2755                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2756                 }
2757
2758                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2759
2760                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2761                         $wgOut->addHTML( EditPage::getEditToolbar( $this->mTitle ) );
2762                 }
2763
2764                 if ( $this->blankArticle ) {
2765                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2766                 }
2767
2768                 if ( $this->isConflict ) {
2769                         // In an edit conflict bypass the overridable content form method
2770                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2771                         // resolved between page source edits and custom ui edits using the
2772                         // custom edit ui.
2773                         $this->textbox2 = $this->textbox1;
2774
2775                         $content = $this->getCurrentContent();
2776                         $this->textbox1 = $this->toEditText( $content );
2777
2778                         $this->showTextbox1();
2779                 } else {
2780                         $this->showContentForm();
2781                 }
2782
2783                 $wgOut->addHTML( $this->editFormTextAfterContent );
2784
2785                 $this->showStandardInputs();
2786
2787                 $this->showFormAfterText();
2788
2789                 $this->showTosSummary();
2790
2791                 $this->showEditTools();
2792
2793                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2794
2795                 $wgOut->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
2796
2797                 $wgOut->addHTML( Html::rawElement( 'div', [ 'class' => 'hiddencats' ],
2798                         Linker::formatHiddenCategories( $this->page->getHiddenCategories() ) ) );
2799
2800                 $wgOut->addHTML( Html::rawElement( 'div', [ 'class' => 'limitreport' ],
2801                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2802
2803                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2804
2805                 if ( $this->isConflict ) {
2806                         try {
2807                                 $this->showConflict();
2808                         } catch ( MWContentSerializationException $ex ) {
2809                                 // this can't really happen, but be nice if it does.
2810                                 $msg = $this->context->msg(
2811                                         'content-failed-to-parse',
2812                                         $this->contentModel,
2813                                         $this->contentFormat,
2814                                         $ex->getMessage()
2815                                 );
2816                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2817                         }
2818                 }
2819
2820                 // Set a hidden field so JS knows what edit form mode we are in
2821                 if ( $this->isConflict ) {
2822                         $mode = 'conflict';
2823                 } elseif ( $this->preview ) {
2824                         $mode = 'preview';
2825                 } elseif ( $this->diff ) {
2826                         $mode = 'diff';
2827                 } else {
2828                         $mode = 'text';
2829                 }
2830                 $wgOut->addHTML( Html::hidden( 'mode', $mode, [ 'id' => 'mw-edit-mode' ] ) );
2831
2832                 // Marker for detecting truncated form data.  This must be the last
2833                 // parameter sent in order to be of use, so do not move me.
2834                 $wgOut->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2835                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2836
2837                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2838                         $this->displayPreviewArea( $previewOutput, false );
2839                 }
2840         }
2841
2842         /**
2843          * Wrapper around TemplatesOnThisPageFormatter to make
2844          * a "templates on this page" list.
2845          *
2846          * @param Title[] $templates
2847          * @return string HTML
2848          */
2849         public function makeTemplatesOnThisPageList( array $templates ) {
2850                 $templateListFormatter = new TemplatesOnThisPageFormatter(
2851                         $this->context, MediaWikiServices::getInstance()->getLinkRenderer()
2852                 );
2853
2854                 // preview if preview, else section if section, else false
2855                 $type = false;
2856                 if ( $this->preview ) {
2857                         $type = 'preview';
2858                 } elseif ( $this->section != '' ) {
2859                         $type = 'section';
2860                 }
2861
2862                 return Html::rawElement( 'div', [ 'class' => 'templatesUsed' ],
2863                         $templateListFormatter->format( $templates, $type )
2864                 );
2865         }
2866
2867         /**
2868          * Extract the section title from current section text, if any.
2869          *
2870          * @param string $text
2871          * @return string|bool String or false
2872          */
2873         public static function extractSectionTitle( $text ) {
2874                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2875                 if ( !empty( $matches[2] ) ) {
2876                         global $wgParser;
2877                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2878                 } else {
2879                         return false;
2880                 }
2881         }
2882
2883         protected function showHeader() {
2884                 global $wgOut, $wgUser;
2885                 global $wgAllowUserCss, $wgAllowUserJs;
2886
2887                 if ( $this->isConflict ) {
2888                         $this->addExplainConflictHeader( $wgOut );
2889                         $this->editRevId = $this->page->getLatest();
2890                 } else {
2891                         if ( $this->section != '' && $this->section != 'new' ) {
2892                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2893                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); // FIXME: use Content object
2894                                         if ( $sectionTitle !== false ) {
2895                                                 $this->summary = "/* $sectionTitle */ ";
2896                                         }
2897                                 }
2898                         }
2899
2900                         if ( $this->missingComment ) {
2901                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2902                         }
2903
2904                         if ( $this->missingSummary && $this->section != 'new' ) {
2905                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2906                         }
2907
2908                         if ( $this->missingSummary && $this->section == 'new' ) {
2909                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2910                         }
2911
2912                         if ( $this->blankArticle ) {
2913                                 $wgOut->wrapWikiMsg( "<div id='mw-blankarticle'>\n$1\n</div>", 'blankarticle' );
2914                         }
2915
2916                         if ( $this->selfRedirect ) {
2917                                 $wgOut->wrapWikiMsg( "<div id='mw-selfredirect'>\n$1\n</div>", 'selfredirect' );
2918                         }
2919
2920                         if ( $this->hookError !== '' ) {
2921                                 $wgOut->addWikiText( $this->hookError );
2922                         }
2923
2924                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2925                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2926                         }
2927
2928                         if ( $this->section != 'new' ) {
2929                                 $revision = $this->mArticle->getRevisionFetched();
2930                                 if ( $revision ) {
2931                                         // Let sysop know that this will make private content public if saved
2932
2933                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2934                                                 $wgOut->wrapWikiMsg(
2935                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2936                                                         'rev-deleted-text-permission'
2937                                                 );
2938                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2939                                                 $wgOut->wrapWikiMsg(
2940                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2941                                                         'rev-deleted-text-view'
2942                                                 );
2943                                         }
2944
2945                                         if ( !$revision->isCurrent() ) {
2946                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2947                                                 $wgOut->addWikiMsg( 'editingold' );
2948                                                 $this->isOldRev = true;
2949                                         }
2950                                 } elseif ( $this->mTitle->exists() ) {
2951                                         // Something went wrong
2952
2953                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2954                                                 [ 'missing-revision', $this->oldid ] );
2955                                 }
2956                         }
2957                 }
2958
2959                 if ( wfReadOnly() ) {
2960                         $wgOut->wrapWikiMsg(
2961                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
2962                                 [ 'readonlywarning', wfReadOnlyReason() ]
2963                         );
2964                 } elseif ( $wgUser->isAnon() ) {
2965                         if ( $this->formtype != 'preview' ) {
2966                                 $wgOut->wrapWikiMsg(
2967                                         "<div id='mw-anon-edit-warning' class='warningbox'>\n$1\n</div>",
2968                                         [ 'anoneditwarning',
2969                                                 // Log-in link
2970                                                 SpecialPage::getTitleFor( 'Userlogin' )->getFullURL( [
2971                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
2972                                                 ] ),
2973                                                 // Sign-up link
2974                                                 SpecialPage::getTitleFor( 'CreateAccount' )->getFullURL( [
2975                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
2976                                                 ] )
2977                                         ]
2978                                 );
2979                         } else {
2980                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\" class=\"warningbox\">\n$1</div>",
2981                                         'anonpreviewwarning'
2982                                 );
2983                         }
2984                 } else {
2985                         if ( $this->isCssJsSubpage ) {
2986                                 # Check the skin exists
2987                                 if ( $this->isWrongCaseCssJsPage ) {
2988                                         $wgOut->wrapWikiMsg(
2989                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
2990                                                 [ 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ]
2991                                         );
2992                                 }
2993                                 if ( $this->getTitle()->isSubpageOf( $wgUser->getUserPage() ) ) {
2994                                         $wgOut->wrapWikiMsg( '<div class="mw-usercssjspublic">$1</div>',
2995                                                 $this->isCssSubpage ? 'usercssispublic' : 'userjsispublic'
2996                                         );
2997                                         if ( $this->formtype !== 'preview' ) {
2998                                                 if ( $this->isCssSubpage && $wgAllowUserCss ) {
2999                                                         $wgOut->wrapWikiMsg(
3000                                                                 "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
3001                                                                 [ 'usercssyoucanpreview' ]
3002                                                         );
3003                                                 }
3004
3005                                                 if ( $this->isJsSubpage && $wgAllowUserJs ) {
3006                                                         $wgOut->wrapWikiMsg(
3007                                                                 "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
3008                                                                 [ 'userjsyoucanpreview' ]
3009                                                         );
3010                                                 }
3011                                         }
3012                                 }
3013                         }
3014                 }
3015
3016                 $this->addPageProtectionWarningHeaders();
3017
3018                 $this->addLongPageWarningHeader();
3019
3020                 # Add header copyright warning
3021                 $this->showHeaderCopyrightWarning();
3022         }
3023
3024         /**
3025          * Standard summary input and label (wgSummary), abstracted so EditPage
3026          * subclasses may reorganize the form.
3027          * Note that you do not need to worry about the label's for=, it will be
3028          * inferred by the id given to the input. You can remove them both by
3029          * passing [ 'id' => false ] to $userInputAttrs.
3030          *
3031          * @param string $summary The value of the summary input
3032          * @param string $labelText The html to place inside the label
3033          * @param array $inputAttrs Array of attrs to use on the input
3034          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
3035          *
3036          * @return array An array in the format [ $label, $input ]
3037          */
3038         function getSummaryInput( $summary = "", $labelText = null,
3039                 $inputAttrs = null, $spanLabelAttrs = null
3040         ) {
3041                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
3042                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : [] ) + [
3043                         'id' => 'wpSummary',
3044                         'maxlength' => '200',
3045                         'tabindex' => '1',
3046                         'size' => 60,
3047                         'spellcheck' => 'true',
3048                 ] + Linker::tooltipAndAccesskeyAttribs( 'summary' );
3049
3050                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : [] ) + [
3051                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
3052                         'id' => "wpSummaryLabel"
3053                 ];
3054
3055                 $label = null;
3056                 if ( $labelText ) {
3057                         $label = Xml::tags(
3058                                 'label',
3059                                 $inputAttrs['id'] ? [ 'for' => $inputAttrs['id'] ] : null,
3060                                 $labelText
3061                         );
3062                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
3063                 }
3064
3065                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
3066
3067                 return [ $label, $input ];
3068         }
3069
3070         /**
3071          * @param bool $isSubjectPreview True if this is the section subject/title
3072          *   up top, or false if this is the comment summary
3073          *   down below the textarea
3074          * @param string $summary The text of the summary to display
3075          */
3076         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
3077                 global $wgOut;
3078                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
3079                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
3080                 if ( $isSubjectPreview ) {
3081                         if ( $this->nosummary ) {
3082                                 return;
3083                         }
3084                 } else {
3085                         if ( !$this->mShowSummaryField ) {
3086                                 return;
3087                         }
3088                 }
3089                 $labelText = $this->context->msg( $isSubjectPreview ? 'subject' : 'summary' )->parse();
3090                 list( $label, $input ) = $this->getSummaryInput(
3091                         $summary,
3092                         $labelText,
3093                         [ 'class' => $summaryClass ],
3094                         []
3095                 );
3096                 $wgOut->addHTML( "{$label} {$input}" );
3097         }
3098
3099         /**
3100          * @param bool $isSubjectPreview True if this is the section subject/title
3101          *   up top, or false if this is the comment summary
3102          *   down below the textarea
3103          * @param string $summary The text of the summary to display
3104          * @return string
3105          */
3106         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
3107                 // avoid spaces in preview, gets always trimmed on save
3108                 $summary = trim( $summary );
3109                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
3110                         return "";
3111                 }
3112
3113                 global $wgParser;
3114
3115                 if ( $isSubjectPreview ) {
3116                         $summary = $this->context->msg( 'newsectionsummary' )
3117                                 ->rawParams( $wgParser->stripSectionName( $summary ) )
3118                                 ->inContentLanguage()->text();
3119                 }
3120
3121                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
3122
3123                 $summary = $this->context->msg( $message )->parse()
3124                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
3125                 return Xml::tags( 'div', [ 'class' => 'mw-summary-preview' ], $summary );
3126         }
3127
3128         protected function showFormBeforeText() {
3129                 global $wgOut;
3130                 $section = htmlspecialchars( $this->section );
3131                 $wgOut->addHTML( <<<HTML
3132 <input type='hidden' value="{$section}" name="wpSection"/>
3133 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
3134 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
3135 <input type='hidden' value="{$this->editRevId}" name="editRevId" />
3136 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
3137
3138 HTML
3139                 );
3140                 if ( !$this->checkUnicodeCompliantBrowser() ) {
3141                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
3142                 }
3143         }
3144
3145         protected function showFormAfterText() {
3146                 global $wgOut, $wgUser;
3147                 /**
3148                  * To make it harder for someone to slip a user a page
3149                  * which submits an edit form to the wiki without their
3150                  * knowledge, a random token is associated with the login
3151                  * session. If it's not passed back with the submission,
3152                  * we won't save the page, or render user JavaScript and
3153                  * CSS previews.
3154                  *
3155                  * For anon editors, who may not have a session, we just
3156                  * include the constant suffix to prevent editing from
3157                  * broken text-mangling proxies.
3158                  */
3159                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
3160         }
3161
3162         /**
3163          * Subpage overridable method for printing the form for page content editing
3164          * By default this simply outputs wpTextbox1
3165          * Subclasses can override this to provide a custom UI for editing;
3166          * be it a form, or simply wpTextbox1 with a modified content that will be
3167          * reverse modified when extracted from the post data.
3168          * Note that this is basically the inverse for importContentFormData
3169          */
3170         protected function showContentForm() {
3171                 $this->showTextbox1();
3172         }
3173
3174         /**
3175          * Method to output wpTextbox1
3176          * The $textoverride method can be used by subclasses overriding showContentForm
3177          * to pass back to this method.
3178          *
3179          * @param array $customAttribs Array of html attributes to use in the textarea
3180          * @param string $textoverride Optional text to override $this->textarea1 with
3181          */
3182         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
3183                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
3184                         $attribs = [ 'style' => 'display:none;' ];
3185                 } else {
3186                         $classes = []; // Textarea CSS
3187                         if ( $this->mTitle->isProtected( 'edit' ) &&
3188                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
3189                         ) {
3190                                 # Is the title semi-protected?
3191                                 if ( $this->mTitle->isSemiProtected() ) {
3192                                         $classes[] = 'mw-textarea-sprotected';
3193                                 } else {
3194                                         # Then it must be protected based on static groups (regular)
3195                                         $classes[] = 'mw-textarea-protected';
3196                                 }
3197                                 # Is the title cascade-protected?
3198                                 if ( $this->mTitle->isCascadeProtected() ) {
3199                                         $classes[] = 'mw-textarea-cprotected';
3200                                 }
3201                         }
3202                         # Is an old revision being edited?
3203                         if ( $this->isOldRev ) {
3204                                 $classes[] = 'mw-textarea-oldrev';
3205                         }
3206
3207                         $attribs = [ 'tabindex' => 1 ];
3208
3209                         if ( is_array( $customAttribs ) ) {
3210                                 $attribs += $customAttribs;
3211                         }
3212
3213                         if ( count( $classes ) ) {
3214                                 if ( isset( $attribs['class'] ) ) {
3215                                         $classes[] = $attribs['class'];
3216                                 }
3217                                 $attribs['class'] = implode( ' ', $classes );
3218                         }
3219                 }
3220
3221                 $this->showTextbox(
3222                         $textoverride !== null ? $textoverride : $this->textbox1,
3223                         'wpTextbox1',
3224                         $attribs
3225                 );
3226         }
3227
3228         protected function showTextbox2() {
3229                 $this->showTextbox( $this->textbox2, 'wpTextbox2', [ 'tabindex' => 6, 'readonly' ] );
3230         }
3231
3232         protected function showTextbox( $text, $name, $customAttribs = [] ) {
3233                 global $wgOut, $wgUser;
3234
3235                 $wikitext = $this->safeUnicodeOutput( $text );
3236                 $wikitext = $this->addNewLineAtEnd( $wikitext );
3237
3238                 $attribs = $this->buildTextboxAttribs( $name, $customAttribs, $wgUser );
3239
3240                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
3241         }
3242
3243         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
3244                 global $wgOut;
3245                 $classes = [];
3246                 if ( $isOnTop ) {
3247                         $classes[] = 'ontop';
3248                 }
3249
3250                 $attribs = [ 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) ];
3251
3252                 if ( $this->formtype != 'preview' ) {
3253                         $attribs['style'] = 'display: none;';
3254                 }
3255
3256                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
3257
3258                 if ( $this->formtype == 'preview' ) {
3259                         $this->showPreview( $previewOutput );
3260                 } else {
3261                         // Empty content container for LivePreview
3262                         $pageViewLang = $this->mTitle->getPageViewLanguage();
3263                         $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3264                                 'class' => 'mw-content-' . $pageViewLang->getDir() ];
3265                         $wgOut->addHTML( Html::rawElement( 'div', $attribs ) );
3266                 }
3267
3268                 $wgOut->addHTML( '</div>' );
3269
3270                 if ( $this->formtype == 'diff' ) {
3271                         try {
3272                                 $this->showDiff();
3273                         } catch ( MWContentSerializationException $ex ) {
3274                                 $msg = $this->context->msg(
3275                                         'content-failed-to-parse',
3276                                         $this->contentModel,
3277                                         $this->contentFormat,
3278                                         $ex->getMessage()
3279                                 );
3280                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3281                         }
3282                 }
3283         }
3284
3285         /**
3286          * Append preview output to $wgOut.
3287          * Includes category rendering if this is a category page.
3288          *
3289          * @param string $text The HTML to be output for the preview.
3290          */
3291         protected function showPreview( $text ) {
3292                 global $wgOut;
3293                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3294                         $this->mArticle->openShowCategory();
3295                 }
3296                 # This hook seems slightly odd here, but makes things more
3297                 # consistent for extensions.
3298                 Hooks::run( 'OutputPageBeforeHTML', [ &$wgOut, &$text ] );
3299                 $wgOut->addHTML( $text );
3300                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3301                         $this->mArticle->closeShowCategory();
3302                 }
3303         }
3304
3305         /**
3306          * Get a diff between the current contents of the edit box and the
3307          * version of the page we're editing from.
3308          *
3309          * If this is a section edit, we'll replace the section as for final
3310          * save and then make a comparison.
3311          */
3312         function showDiff() {
3313                 global $wgUser, $wgContLang, $wgOut;
3314
3315                 $oldtitlemsg = 'currentrev';
3316                 # if message does not exist, show diff against the preloaded default
3317                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3318                         $oldtext = $this->mTitle->getDefaultMessageText();
3319                         if ( $oldtext !== false ) {
3320                                 $oldtitlemsg = 'defaultmessagetext';
3321                                 $oldContent = $this->toEditContent( $oldtext );
3322                         } else {
3323                                 $oldContent = null;
3324                         }
3325                 } else {
3326                         $oldContent = $this->getCurrentContent();
3327                 }
3328
3329                 $textboxContent = $this->toEditContent( $this->textbox1 );
3330                 if ( $this->editRevId !== null ) {
3331                         $newContent = $this->page->replaceSectionAtRev(
3332                                 $this->section, $textboxContent, $this->summary, $this->editRevId
3333                         );
3334                 } else {
3335                         $newContent = $this->page->replaceSectionContent(
3336                                 $this->section, $textboxContent, $this->summary, $this->edittime
3337                         );
3338                 }
3339
3340                 if ( $newContent ) {
3341                         Hooks::run( 'EditPageGetDiffContent', [ $this, &$newContent ] );
3342
3343                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
3344                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
3345                 }
3346
3347                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3348                         $oldtitle = $this->context->msg( $oldtitlemsg )->parse();
3349                         $newtitle = $this->context->msg( 'yourtext' )->parse();
3350
3351                         if ( !$oldContent ) {
3352                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3353                         }
3354
3355                         if ( !$newContent ) {
3356                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3357                         }
3358
3359                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
3360                         $de->setContent( $oldContent, $newContent );
3361
3362                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3363                         $de->showDiffStyle();
3364                 } else {
3365                         $difftext = '';
3366                 }
3367
3368                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3369         }
3370
3371         /**
3372          * Show the header copyright warning.
3373          */
3374         protected function showHeaderCopyrightWarning() {
3375                 $msg = 'editpage-head-copy-warn';
3376                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3377                         global $wgOut;
3378                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3379                                 'editpage-head-copy-warn' );
3380                 }
3381         }
3382
3383         /**
3384          * Give a chance for site and per-namespace customizations of
3385          * terms of service summary link that might exist separately
3386          * from the copyright notice.
3387          *
3388          * This will display between the save button and the edit tools,
3389          * so should remain short!
3390          */
3391         protected function showTosSummary() {
3392                 $msg = 'editpage-tos-summary';
3393                 Hooks::run( 'EditPageTosSummary', [ $this->mTitle, &$msg ] );
3394                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3395                         global $wgOut;
3396                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
3397                         $wgOut->addWikiMsg( $msg );
3398                         $wgOut->addHTML( '</div>' );
3399                 }
3400         }
3401
3402         protected function showEditTools() {
3403                 global $wgOut;
3404                 $wgOut->addHTML( '<div class="mw-editTools">' .
3405                         $this->context->msg( 'edittools' )->inContentLanguage()->parse() .
3406                         '</div>' );
3407         }
3408
3409         /**
3410          * Get the copyright warning
3411          *
3412          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3413          * @return string
3414          */
3415         protected function getCopywarn() {
3416                 return self::getCopyrightWarning( $this->mTitle );
3417         }
3418
3419         /**
3420          * Get the copyright warning, by default returns wikitext
3421          *
3422          * @param Title $title
3423          * @param string $format Output format, valid values are any function of a Message object
3424          * @param Language|string|null $langcode Language code or Language object.
3425          * @return string
3426          */
3427         public static function getCopyrightWarning( $title, $format = 'plain', $langcode = null ) {
3428                 global $wgRightsText;
3429                 if ( $wgRightsText ) {
3430                         $copywarnMsg = [ 'copyrightwarning',
3431                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3432                                 $wgRightsText ];
3433                 } else {
3434                         $copywarnMsg = [ 'copyrightwarning2',
3435                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' ];
3436                 }
3437                 // Allow for site and per-namespace customization of contribution/copyright notice.
3438                 Hooks::run( 'EditPageCopyrightWarning', [ $title, &$copywarnMsg ] );
3439
3440                 $msg = call_user_func_array( 'wfMessage', $copywarnMsg )->title( $title );
3441                 if ( $langcode ) {
3442                         $msg->inLanguage( $langcode );
3443                 }
3444                 return "<div id=\"editpage-copywarn\">\n" .
3445                         $msg->$format() . "\n</div>";
3446         }
3447
3448         /**
3449          * Get the Limit report for page previews
3450          *
3451          * @since 1.22
3452          * @param ParserOutput $output ParserOutput object from the parse
3453          * @return string HTML
3454          */
3455         public static function getPreviewLimitReport( $output ) {
3456                 if ( !$output || !$output->getLimitReportData() ) {
3457                         return '';
3458                 }
3459
3460                 $limitReport = Html::rawElement( 'div', [ 'class' => 'mw-limitReportExplanation' ],
3461                         wfMessage( 'limitreport-title' )->parseAsBlock()
3462                 );
3463
3464                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3465                 $limitReport .= Html::openElement( 'div', [ 'class' => 'preview-limit-report-wrapper' ] );
3466
3467                 $limitReport .= Html::openElement( 'table', [
3468                         'class' => 'preview-limit-report wikitable'
3469                 ] ) .
3470                         Html::openElement( 'tbody' );
3471
3472                 foreach ( $output->getLimitReportData() as $key => $value ) {
3473                         if ( Hooks::run( 'ParserLimitReportFormat',
3474                                 [ $key, &$value, &$limitReport, true, true ]
3475                         ) ) {
3476                                 $keyMsg = wfMessage( $key );
3477                                 $valueMsg = wfMessage( [ "$key-value-html", "$key-value" ] );
3478                                 if ( !$valueMsg->exists() ) {
3479                                         $valueMsg = new RawMessage( '$1' );
3480                                 }
3481                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3482                                         $limitReport .= Html::openElement( 'tr' ) .
3483                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3484                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
3485                                                 Html::closeElement( 'tr' );
3486                                 }
3487                         }
3488                 }
3489
3490                 $limitReport .= Html::closeElement( 'tbody' ) .
3491                         Html::closeElement( 'table' ) .
3492                         Html::closeElement( 'div' );
3493
3494                 return $limitReport;
3495         }
3496
3497         protected function showStandardInputs( &$tabindex = 2 ) {
3498                 global $wgOut;
3499                 $wgOut->addHTML( "<div class='editOptions'>\n" );
3500
3501                 if ( $this->section != 'new' ) {
3502                         $this->showSummaryInput( false, $this->summary );
3503                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3504                 }
3505
3506                 $checkboxes = $this->getCheckboxes( $tabindex,
3507                         [ 'minor' => $this->minoredit, 'watch' => $this->watchthis ] );
3508                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
3509
3510                 // Show copyright warning.
3511                 $wgOut->addWikiText( $this->getCopywarn() );
3512                 $wgOut->addHTML( $this->editFormTextAfterWarn );
3513
3514                 $wgOut->addHTML( "<div class='editButtons'>\n" );
3515                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3516
3517                 $cancel = $this->getCancelLink();
3518                 if ( $cancel !== '' ) {
3519                         $cancel .= Html::element( 'span',
3520                                 [ 'class' => 'mw-editButtons-pipe-separator' ],
3521                                 $this->context->msg( 'pipe-separator' )->text() );
3522                 }
3523
3524                 $message = $this->context->msg( 'edithelppage' )->inContentLanguage()->text();
3525                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3526                 $attrs = [
3527                         'target' => 'helpwindow',
3528                         'href' => $edithelpurl,
3529                 ];
3530                 $edithelp = Html::linkButton( $this->context->msg( 'edithelp' )->text(),
3531                         $attrs, [ 'mw-ui-quiet' ] ) .
3532                         $this->context->msg( 'word-separator' )->escaped() .
3533                         $this->context->msg( 'newwindow' )->parse();
3534
3535                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
3536                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
3537                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
3538
3539                 Hooks::run( 'EditPage::showStandardInputs:options', [ $this, $wgOut, &$tabindex ] );
3540
3541                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
3542         }
3543
3544         /**
3545          * Show an edit conflict. textbox1 is already shown in showEditForm().
3546          * If you want to use another entry point to this function, be careful.
3547          */
3548         protected function showConflict() {
3549                 global $wgOut;
3550
3551                 // Avoid PHP 7.1 warning of passing $this by reference
3552                 $editPage = $this;
3553                 if ( Hooks::run( 'EditPageBeforeConflictDiff', [ &$editPage, &$wgOut ] ) ) {
3554                         $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
3555                         $stats->increment( 'edit.failures.conflict' );
3556                         // Only include 'standard' namespaces to avoid creating unknown numbers of statsd metrics
3557                         if (
3558                                 $this->mTitle->getNamespace() >= NS_MAIN &&
3559                                 $this->mTitle->getNamespace() <= NS_CATEGORY_TALK
3560                         ) {
3561                                 $stats->increment( 'edit.failures.conflict.byNamespaceId.' . $this->mTitle->getNamespace() );
3562                         }
3563
3564                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3565
3566                         $content1 = $this->toEditContent( $this->textbox1 );
3567                         $content2 = $this->toEditContent( $this->textbox2 );
3568
3569                         $handler = ContentHandler::getForModelID( $this->contentModel );
3570                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3571                         $de->setContent( $content2, $content1 );
3572                         $de->showDiff(
3573                                 $this->context->msg( 'yourtext' )->parse(),
3574                                 $this->context->msg( 'storedversion' )->text()
3575                         );
3576
3577                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3578                         $this->showTextbox2();
3579                 }
3580         }
3581
3582         /**
3583          * @return string
3584          */
3585         public function getCancelLink() {
3586                 $cancelParams = [];
3587                 if ( !$this->isConflict && $this->oldid > 0 ) {
3588                         $cancelParams['oldid'] = $this->oldid;
3589                 } elseif ( $this->getContextTitle()->isRedirect() ) {
3590                         $cancelParams['redirect'] = 'no';
3591                 }
3592                 $attrs = [ 'id' => 'mw-editform-cancel' ];
3593
3594                 return Linker::linkKnown(
3595                         $this->getContextTitle(),
3596                         $this->context->msg( 'cancel' )->parse(),
3597                         Html::buttonAttributes( $attrs, [ 'mw-ui-quiet' ] ),
3598                         $cancelParams
3599                 );
3600         }
3601
3602         /**
3603          * Returns the URL to use in the form's action attribute.
3604          * This is used by EditPage subclasses when simply customizing the action
3605          * variable in the constructor is not enough. This can be used when the
3606          * EditPage lives inside of a Special page rather than a custom page action.
3607          *
3608          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3609          * @return string
3610          */
3611         protected function getActionURL( Title $title ) {
3612                 return $title->getLocalURL( [ 'action' => $this->action ] );
3613         }
3614
3615         /**
3616          * Check if a page was deleted while the user was editing it, before submit.
3617          * Note that we rely on the logging table, which hasn't been always there,
3618          * but that doesn't matter, because this only applies to brand new
3619          * deletes.
3620          * @return bool
3621          */
3622         protected function wasDeletedSinceLastEdit() {
3623                 if ( $this->deletedSinceEdit !== null ) {
3624                         return $this->deletedSinceEdit;
3625                 }
3626
3627                 $this->deletedSinceEdit = false;
3628
3629                 if ( !$this->mTitle->exists() && $this->mTitle->isDeletedQuick() ) {
3630                         $this->lastDelete = $this->getLastDelete();
3631                         if ( $this->lastDelete ) {
3632                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3633                                 if ( $deleteTime > $this->starttime ) {
3634                                         $this->deletedSinceEdit = true;
3635                                 }
3636                         }
3637                 }
3638
3639                 return $this->deletedSinceEdit;
3640         }
3641
3642         /**
3643          * @return bool|stdClass
3644          */
3645         protected function getLastDelete() {
3646                 $dbr = wfGetDB( DB_REPLICA );
3647                 $data = $dbr->selectRow(
3648                         [ 'logging', 'user' ],
3649                         [
3650                                 'log_type',
3651                                 'log_action',
3652                                 'log_timestamp',
3653                                 'log_user',
3654                                 'log_namespace',
3655                                 'log_title',
3656                                 'log_comment',
3657                                 'log_params',
3658                                 'log_deleted',
3659                                 'user_name'
3660                         ], [
3661                                 'log_namespace' => $this->mTitle->getNamespace(),
3662                                 'log_title' => $this->mTitle->getDBkey(),
3663                                 'log_type' => 'delete',
3664                                 'log_action' => 'delete',
3665                                 'user_id=log_user'
3666                         ],
3667                         __METHOD__,
3668                         [ 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ]
3669                 );
3670                 // Quick paranoid permission checks...
3671                 if ( is_object( $data ) ) {
3672                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3673                                 $data->user_name = $this->context->msg( 'rev-deleted-user' )->escaped();
3674                         }
3675
3676                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3677                                 $data->log_comment = $this->context->msg( 'rev-deleted-comment' )->escaped();
3678                         }
3679                 }
3680
3681                 return $data;
3682         }
3683
3684         /**
3685          * Get the rendered text for previewing.
3686          * @throws MWException
3687          * @return string
3688          */
3689         function getPreviewText() {
3690                 global $wgOut, $wgRawHtml, $wgLang;
3691                 global $wgAllowUserCss, $wgAllowUserJs;
3692
3693                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
3694
3695                 if ( $wgRawHtml && !$this->mTokenOk ) {
3696                         // Could be an offsite preview attempt. This is very unsafe if
3697                         // HTML is enabled, as it could be an attack.
3698                         $parsedNote = '';
3699                         if ( $this->textbox1 !== '' ) {
3700                                 // Do not put big scary notice, if previewing the empty
3701                                 // string, which happens when you initially edit
3702                                 // a category page, due to automatic preview-on-open.
3703                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3704                                         $this->context->msg( 'session_fail_preview_html' )->text() . "</div>",
3705                                         true, /* interface */true );
3706                         }
3707                         $stats->increment( 'edit.failures.session_loss' );
3708                         return $parsedNote;
3709                 }
3710
3711                 $note = '';
3712
3713                 try {
3714                         $content = $this->toEditContent( $this->textbox1 );
3715
3716                         $previewHTML = '';
3717                         if ( !Hooks::run(
3718                                 'AlternateEditPreview',
3719                                 [ $this, &$content, &$previewHTML, &$this->mParserOutput ] )
3720                         ) {
3721                                 return $previewHTML;
3722                         }
3723
3724                         # provide a anchor link to the editform
3725                         $continueEditing = '<span class="mw-continue-editing">' .
3726                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3727                                 $this->context->msg( 'continue-editing' )->text() . ']]</span>';
3728                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3729                                 if ( $this->mTokenOkExceptSuffix ) {
3730                                         $note = $this->context->msg( 'token_suffix_mismatch' )->plain();
3731                                         $stats->increment( 'edit.failures.bad_token' );
3732                                 } else {
3733                                         $note = $this->context->msg( 'session_fail_preview' )->plain();
3734                                         $stats->increment( 'edit.failures.session_loss' );
3735                                 }
3736                         } elseif ( $this->incompleteForm ) {
3737                                 $note = $this->context->msg( 'edit_form_incomplete' )->plain();
3738                                 if ( $this->mTriedSave ) {
3739                                         $stats->increment( 'edit.failures.incomplete_form' );
3740                                 }
3741                         } else {
3742                                 $note = $this->context->msg( 'previewnote' )->plain() . ' ' . $continueEditing;
3743                         }
3744
3745                         # don't parse non-wikitext pages, show message about preview
3746                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3747                                 if ( $this->mTitle->isCssJsSubpage() ) {
3748                                         $level = 'user';
3749                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3750                                         $level = 'site';
3751                                 } else {
3752                                         $level = false;
3753                                 }
3754
3755                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3756                                         $format = 'css';
3757                                         if ( $level === 'user' && !$wgAllowUserCss ) {
3758                                                 $format = false;
3759                                         }
3760                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3761                                         $format = 'js';
3762                                         if ( $level === 'user' && !$wgAllowUserJs ) {
3763                                                 $format = false;
3764                                         }
3765                                 } else {
3766                                         $format = false;
3767                                 }
3768
3769                                 # Used messages to make sure grep find them:
3770                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3771                                 if ( $level && $format ) {
3772                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3773                                                 $this->context->msg( "{$level}{$format}preview" )->text() .
3774                                                 ' ' . $continueEditing . "</div>";
3775                                 }
3776                         }
3777
3778                         # If we're adding a comment, we need to show the
3779                         # summary as the headline
3780                         if ( $this->section === "new" && $this->summary !== "" ) {
3781                                 $content = $content->addSectionHeader( $this->summary );
3782                         }
3783
3784                         $hook_args = [ $this, &$content ];
3785                         ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args, '1.25' );
3786                         Hooks::run( 'EditPageGetPreviewContent', $hook_args );
3787
3788                         $parserResult = $this->doPreviewParse( $content );
3789                         $parserOutput = $parserResult['parserOutput'];
3790                         $previewHTML = $parserResult['html'];
3791                         $this->mParserOutput = $parserOutput;
3792                         $wgOut->addParserOutputMetadata( $parserOutput );
3793
3794                         if ( count( $parserOutput->getWarnings() ) ) {
3795                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3796                         }
3797
3798                 } catch ( MWContentSerializationException $ex ) {
3799                         $m = $this->context->msg(
3800                                 'content-failed-to-parse',
3801                                 $this->contentModel,
3802                                 $this->contentFormat,
3803                                 $ex->getMessage()
3804                         );
3805                         $note .= "\n\n" . $m->parse();
3806                         $previewHTML = '';
3807                 }
3808
3809                 if ( $this->isConflict ) {
3810                         $conflict = '<h2 id="mw-previewconflict">'
3811                                 . $this->context->msg( 'previewconflict' )->escaped() . "</h2>\n";
3812                 } else {
3813                         $conflict = '<hr />';
3814                 }
3815
3816                 $previewhead = "<div class='previewnote'>\n" .
3817                         '<h2 id="mw-previewheader">' . $this->context->msg( 'preview' )->escaped() . "</h2>" .
3818                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3819
3820                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3821                 $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3822                         'class' => 'mw-content-' . $pageViewLang->getDir() ];
3823                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3824
3825                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3826         }
3827
3828         /**
3829          * Get parser options for a preview
3830          * @return ParserOptions
3831          */
3832         protected function getPreviewParserOptions() {
3833                 $parserOptions = $this->page->makeParserOptions( $this->mArticle->getContext() );
3834                 $parserOptions->setIsPreview( true );
3835                 $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3836                 $parserOptions->enableLimitReport();
3837                 return $parserOptions;
3838         }
3839
3840         /**
3841          * Parse the page for a preview. Subclasses may override this class, in order
3842          * to parse with different options, or to otherwise modify the preview HTML.
3843          *
3844          * @param Content $content The page content
3845          * @return array with keys:
3846          *   - parserOutput: The ParserOutput object
3847          *   - html: The HTML to be displayed
3848          */
3849         protected function doPreviewParse( Content $content ) {
3850                 global $wgUser;
3851                 $parserOptions = $this->getPreviewParserOptions();
3852                 $pstContent = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3853                 $scopedCallback = $parserOptions->setupFakeRevision(
3854                         $this->mTitle, $pstContent, $wgUser );
3855                 $parserOutput = $pstContent->getParserOutput( $this->mTitle, null, $parserOptions );
3856                 ScopedCallback::consume( $scopedCallback );
3857                 $parserOutput->setEditSectionTokens( false ); // no section edit links
3858                 return [
3859                         'parserOutput' => $parserOutput,
3860                         'html' => $parserOutput->getText() ];
3861         }
3862
3863         /**
3864          * @return array
3865          */
3866         function getTemplates() {
3867                 if ( $this->preview || $this->section != '' ) {
3868                         $templates = [];
3869                         if ( !isset( $this->mParserOutput ) ) {
3870                                 return $templates;
3871                         }
3872                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3873                                 foreach ( array_keys( $template ) as $dbk ) {
3874                                         $templates[] = Title::makeTitle( $ns, $dbk );
3875                                 }
3876                         }
3877                         return $templates;
3878                 } else {
3879                         return $this->mTitle->getTemplateLinksFrom();
3880                 }
3881         }
3882
3883         /**
3884          * Shows a bulletin board style toolbar for common editing functions.
3885          * It can be disabled in the user preferences.
3886          *
3887          * @param Title $title Title object for the page being edited (optional)
3888          * @return string
3889          */
3890         static function getEditToolbar( $title = null ) {
3891                 global $wgContLang, $wgOut;
3892                 global $wgEnableUploads, $wgForeignFileRepos;
3893
3894                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3895                 $showSignature = true;
3896                 if ( $title ) {
3897                         $showSignature = MWNamespace::wantSignatures( $title->getNamespace() );
3898                 }
3899
3900                 /**
3901                  * $toolarray is an array of arrays each of which includes the
3902                  * opening tag, the closing tag, optionally a sample text that is
3903                  * inserted between the two when no selection is highlighted
3904                  * and.  The tip text is shown when the user moves the mouse
3905                  * over the button.
3906                  *
3907                  * Images are defined in ResourceLoaderEditToolbarModule.
3908                  */
3909                 $toolarray = [
3910                         [
3911                                 'id'     => 'mw-editbutton-bold',
3912                                 'open'   => '\'\'\'',
3913                                 'close'  => '\'\'\'',
3914                                 'sample' => wfMessage( 'bold_sample' )->text(),
3915                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3916                         ],
3917                         [
3918                                 'id'     => 'mw-editbutton-italic',
3919                                 'open'   => '\'\'',
3920                                 'close'  => '\'\'',
3921                                 'sample' => wfMessage( 'italic_sample' )->text(),
3922                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3923                         ],
3924                         [
3925                                 'id'     => 'mw-editbutton-link',
3926                                 'open'   => '[[',
3927                                 'close'  => ']]',
3928                                 'sample' => wfMessage( 'link_sample' )->text(),
3929                                 'tip'    => wfMessage( 'link_tip' )->text(),
3930                         ],
3931                         [
3932                                 'id'     => 'mw-editbutton-extlink',
3933                                 'open'   => '[',
3934                                 'close'  => ']',
3935                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3936                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3937                         ],
3938                         [
3939                                 'id'     => 'mw-editbutton-headline',
3940                                 'open'   => "\n== ",
3941                                 'close'  => " ==\n",
3942                                 'sample' => wfMessage( 'headline_sample' )->text(),
3943                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3944                         ],
3945                         $imagesAvailable ? [
3946                                 'id'     => 'mw-editbutton-image',
3947                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3948                                 'close'  => ']]',
3949                                 'sample' => wfMessage( 'image_sample' )->text(),
3950                                 'tip'    => wfMessage( 'image_tip' )->text(),
3951                         ] : false,
3952                         $imagesAvailable ? [
3953                                 'id'     => 'mw-editbutton-media',
3954                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3955                                 'close'  => ']]',
3956                                 'sample' => wfMessage( 'media_sample' )->text(),
3957                                 'tip'    => wfMessage( 'media_tip' )->text(),
3958                         ] : false,
3959                         [
3960                                 'id'     => 'mw-editbutton-nowiki',
3961                                 'open'   => "<nowiki>",
3962                                 'close'  => "</nowiki>",
3963                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3964                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3965                         ],
3966                         $showSignature ? [
3967                                 'id'     => 'mw-editbutton-signature',
3968                                 'open'   => wfMessage( 'sig-text', '~~~~' )->inContentLanguage()->text(),
3969                                 'close'  => '',
3970                                 'sample' => '',
3971                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3972                         ] : false,
3973                         [
3974                                 'id'     => 'mw-editbutton-hr',
3975                                 'open'   => "\n----\n",
3976                                 'close'  => '',
3977                                 'sample' => '',
3978                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3979                         ]
3980                 ];
3981
3982                 $script = 'mw.loader.using("mediawiki.toolbar", function () {';
3983                 foreach ( $toolarray as $tool ) {
3984                         if ( !$tool ) {
3985                                 continue;
3986                         }
3987
3988                         $params = [
3989                                 // Images are defined in ResourceLoaderEditToolbarModule
3990                                 false,
3991                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3992                                 // Older browsers show a "speedtip" type message only for ALT.
3993                                 // Ideally these should be different, realistically they
3994                                 // probably don't need to be.
3995                                 $tool['tip'],
3996                                 $tool['open'],
3997                                 $tool['close'],
3998                                 $tool['sample'],
3999                                 $tool['id'],
4000                         ];
4001
4002                         $script .= Xml::encodeJsCall(
4003                                 'mw.toolbar.addButton',
4004                                 $params,
4005                                 ResourceLoader::inDebugMode()
4006                         );
4007                 }
4008
4009                 $script .= '});';
4010                 $wgOut->addScript( ResourceLoader::makeInlineScript( $script ) );
4011
4012                 $toolbar = '<div id="toolbar"></div>';
4013
4014                 Hooks::run( 'EditPageBeforeEditToolbar', [ &$toolbar ] );
4015
4016                 return $toolbar;
4017         }
4018
4019         /**
4020          * Returns an array of html code of the following checkboxes:
4021          * minor and watch
4022          *
4023          * @param int $tabindex Current tabindex
4024          * @param array $checked Array of checkbox => bool, where bool indicates the checked
4025          *                 status of the checkbox
4026          *
4027          * @return array
4028          */
4029         public function getCheckboxes( &$tabindex, $checked ) {
4030                 global $wgUser, $wgUseMediaWikiUIEverywhere;
4031
4032                 $checkboxes = [];
4033
4034                 // don't show the minor edit checkbox if it's a new page or section
4035                 if ( !$this->isNew ) {
4036                         $checkboxes['minor'] = '';
4037                         $minorLabel = $this->context->msg( 'minoredit' )->parse();
4038                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
4039                                 $attribs = [
4040                                         'tabindex' => ++$tabindex,
4041                                         'accesskey' => $this->context->msg( 'accesskey-minoredit' )->text(),
4042                                         'id' => 'wpMinoredit',
4043                                 ];
4044                                 $minorEditHtml =
4045                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
4046                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
4047                                         Xml::expandAttributes( [ 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ] ) .
4048                                         ">{$minorLabel}</label>";
4049
4050                                 if ( $wgUseMediaWikiUIEverywhere ) {
4051                                         $checkboxes['minor'] = Html::openElement( 'div', [ 'class' => 'mw-ui-checkbox' ] ) .
4052                                                 $minorEditHtml .
4053                                         Html::closeElement( 'div' );
4054                                 } else {
4055                                         $checkboxes['minor'] = $minorEditHtml;
4056                                 }
4057                         }
4058                 }
4059
4060                 $watchLabel = $this->context->msg( 'watchthis' )->parse();
4061                 $checkboxes['watch'] = '';
4062                 if ( $wgUser->isLoggedIn() ) {
4063                         $attribs = [
4064                                 'tabindex' => ++$tabindex,
4065                                 'accesskey' => $this->context->msg( 'accesskey-watch' )->text(),
4066                                 'id' => 'wpWatchthis',
4067                         ];
4068                         $watchThisHtml =
4069                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
4070                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
4071                                 Xml::expandAttributes( [ 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ] ) .
4072                                 ">{$watchLabel}</label>";
4073                         if ( $wgUseMediaWikiUIEverywhere ) {
4074                                 $checkboxes['watch'] = Html::openElement( 'div', [ 'class' => 'mw-ui-checkbox' ] ) .
4075                                         $watchThisHtml .
4076                                         Html::closeElement( 'div' );
4077                         } else {
4078                                 $checkboxes['watch'] = $watchThisHtml;
4079                         }
4080                 }
4081
4082                 // Avoid PHP 7.1 warning of passing $this by reference
4083                 $editPage = $this;
4084                 Hooks::run( 'EditPageBeforeEditChecks', [ &$editPage, &$checkboxes, &$tabindex ] );
4085                 return $checkboxes;
4086         }
4087
4088         /**
4089          * Returns an array of html code of the following buttons:
4090          * save, diff and preview
4091          *
4092          * @param int $tabindex Current tabindex
4093          *
4094          * @return array
4095          */
4096         public function getEditButtons( &$tabindex ) {
4097                 $buttons = [];
4098
4099                 $labelAsPublish =
4100                         $this->mArticle->getContext()->getConfig()->get( 'EditSubmitButtonLabelPublish' );
4101
4102                 // Can't use $this->isNew as that's also true if we're adding a new section to an extant page
4103                 if ( $labelAsPublish ) {
4104                         $buttonLabelKey = !$this->mTitle->exists() ? 'publishpage' : 'publishchanges';
4105                 } else {
4106                         $buttonLabelKey = !$this->mTitle->exists() ? 'savearticle' : 'savechanges';
4107                 }
4108                 $buttonLabel = $this->context->msg( $buttonLabelKey )->text();
4109                 $attribs = [
4110                         'id' => 'wpSave',
4111                         'name' => 'wpSave',
4112                         'tabindex' => ++$tabindex,
4113                 ] + Linker::tooltipAndAccesskeyAttribs( 'save' );
4114                 $buttons['save'] = Html::submitButton( $buttonLabel, $attribs, [ 'mw-ui-progressive' ] );
4115
4116                 ++$tabindex; // use the same for preview and live preview
4117                 $attribs = [
4118                         'id' => 'wpPreview',
4119                         'name' => 'wpPreview',
4120                         'tabindex' => $tabindex,
4121                 ] + Linker::tooltipAndAccesskeyAttribs( 'preview' );
4122                 $buttons['preview'] = Html::submitButton( $this->context->msg( 'showpreview' )->text(),
4123                         $attribs );
4124
4125                 $attribs = [
4126                         'id' => 'wpDiff',
4127                         'name' => 'wpDiff',
4128                         'tabindex' => ++$tabindex,
4129                 ] + Linker::tooltipAndAccesskeyAttribs( 'diff' );
4130                 $buttons['diff'] = Html::submitButton( $this->context->msg( 'showdiff' )->text(),
4131                         $attribs );
4132
4133                 // Avoid PHP 7.1 warning of passing $this by reference
4134                 $editPage = $this;
4135                 Hooks::run( 'EditPageBeforeEditButtons', [ &$editPage, &$buttons, &$tabindex ] );
4136                 return $buttons;
4137         }
4138
4139         /**
4140          * Creates a basic error page which informs the user that
4141          * they have attempted to edit a nonexistent section.
4142          */
4143         function noSuchSectionPage() {
4144                 global $wgOut;
4145
4146                 $wgOut->prepareErrorPage( $this->context->msg( 'nosuchsectiontitle' ) );
4147
4148                 $res = $this->context->msg( 'nosuchsectiontext', $this->section )->parseAsBlock();
4149
4150                 // Avoid PHP 7.1 warning of passing $this by reference
4151                 $editPage = $this;
4152                 Hooks::run( 'EditPageNoSuchSection', [ &$editPage, &$res ] );
4153                 $wgOut->addHTML( $res );
4154
4155                 $wgOut->returnToMain( false, $this->mTitle );
4156         }
4157
4158         /**
4159          * Show "your edit contains spam" page with your diff and text
4160          *
4161          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
4162          */
4163         public function spamPageWithContent( $match = false ) {
4164                 global $wgOut, $wgLang;
4165                 $this->textbox2 = $this->textbox1;
4166
4167                 if ( is_array( $match ) ) {
4168                         $match = $wgLang->listToText( $match );
4169                 }
4170                 $wgOut->prepareErrorPage( $this->context->msg( 'spamprotectiontitle' ) );
4171
4172                 $wgOut->addHTML( '<div id="spamprotected">' );
4173                 $wgOut->addWikiMsg( 'spamprotectiontext' );
4174                 if ( $match ) {
4175                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
4176                 }
4177                 $wgOut->addHTML( '</div>' );
4178
4179                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
4180                 $this->showDiff();
4181
4182                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
4183                 $this->showTextbox2();
4184
4185                 $wgOut->addReturnTo( $this->getContextTitle(), [ 'action' => 'edit' ] );
4186         }
4187
4188         /**
4189          * Check if the browser is on a blacklist of user-agents known to
4190          * mangle UTF-8 data on form submission. Returns true if Unicode
4191          * should make it through, false if it's known to be a problem.
4192          * @return bool
4193          */
4194         private function checkUnicodeCompliantBrowser() {
4195                 global $wgBrowserBlackList, $wgRequest;
4196
4197                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
4198                 if ( $currentbrowser === false ) {
4199                         // No User-Agent header sent? Trust it by default...
4200                         return true;
4201                 }
4202
4203                 foreach ( $wgBrowserBlackList as $browser ) {
4204                         if ( preg_match( $browser, $currentbrowser ) ) {
4205                                 return false;
4206                         }
4207                 }
4208                 return true;
4209         }
4210
4211         /**
4212          * Filter an input field through a Unicode de-armoring process if it
4213          * came from an old browser with known broken Unicode editing issues.
4214          *
4215          * @param WebRequest $request
4216          * @param string $field
4217          * @return string
4218          */
4219         protected function safeUnicodeInput( $request, $field ) {
4220                 $text = rtrim( $request->getText( $field ) );
4221                 return $request->getBool( 'safemode' )
4222                         ? $this->unmakeSafe( $text )
4223                         : $text;
4224         }
4225
4226         /**
4227          * Filter an output field through a Unicode armoring process if it is
4228          * going to an old browser with known broken Unicode editing issues.
4229          *
4230          * @param string $text
4231          * @return string
4232          */
4233         protected function safeUnicodeOutput( $text ) {
4234                 return $this->checkUnicodeCompliantBrowser()
4235                         ? $text
4236                         : $this->makeSafe( $text );
4237         }
4238
4239         /**
4240          * A number of web browsers are known to corrupt non-ASCII characters
4241          * in a UTF-8 text editing environment. To protect against this,
4242          * detected browsers will be served an armored version of the text,
4243          * with non-ASCII chars converted to numeric HTML character references.
4244          *
4245          * Preexisting such character references will have a 0 added to them
4246          * to ensure that round-trips do not alter the original data.
4247          *
4248          * @param string $invalue
4249          * @return string
4250          */
4251         private function makeSafe( $invalue ) {
4252                 // Armor existing references for reversibility.
4253                 $invalue = strtr( $invalue, [ "&#x" => "&#x0" ] );
4254
4255                 $bytesleft = 0;
4256                 $result = "";
4257                 $working = 0;
4258                 $valueLength = strlen( $invalue );
4259                 for ( $i = 0; $i < $valueLength; $i++ ) {
4260                         $bytevalue = ord( $invalue[$i] );
4261                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
4262                                 $result .= chr( $bytevalue );
4263                                 $bytesleft = 0;
4264                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
4265                                 $working = $working << 6;
4266                                 $working += ( $bytevalue & 0x3F );
4267                                 $bytesleft--;
4268                                 if ( $bytesleft <= 0 ) {
4269                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
4270                                 }
4271                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
4272                                 $working = $bytevalue & 0x1F;
4273                                 $bytesleft = 1;
4274                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
4275                                 $working = $bytevalue & 0x0F;
4276                                 $bytesleft = 2;
4277                         } else { // 1111 0xxx
4278                                 $working = $bytevalue & 0x07;
4279                                 $bytesleft = 3;
4280                         }
4281                 }
4282                 return $result;
4283         }
4284
4285         /**
4286          * Reverse the previously applied transliteration of non-ASCII characters
4287          * back to UTF-8. Used to protect data from corruption by broken web browsers
4288          * as listed in $wgBrowserBlackList.
4289          *
4290          * @param string $invalue
4291          * @return string
4292          */
4293         private function unmakeSafe( $invalue ) {
4294                 $result = "";
4295                 $valueLength = strlen( $invalue );
4296                 for ( $i = 0; $i < $valueLength; $i++ ) {
4297                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
4298                                 $i += 3;
4299                                 $hexstring = "";
4300                                 do {
4301                                         $hexstring .= $invalue[$i];
4302                                         $i++;
4303                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
4304
4305                                 // Do some sanity checks. These aren't needed for reversibility,
4306                                 // but should help keep the breakage down if the editor
4307                                 // breaks one of the entities whilst editing.
4308                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) && ( strlen( $hexstring ) <= 6 ) ) {
4309                                         $codepoint = hexdec( $hexstring );
4310                                         $result .= UtfNormal\Utils::codepointToUtf8( $codepoint );
4311                                 } else {
4312                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
4313                                 }
4314                         } else {
4315                                 $result .= substr( $invalue, $i, 1 );
4316                         }
4317                 }
4318                 // reverse the transform that we made for reversibility reasons.
4319                 return strtr( $result, [ "&#x0" => "&#x" ] );
4320         }
4321
4322         /**
4323          * @since 1.29
4324          */
4325         protected function addEditNotices() {
4326                 global $wgOut;
4327
4328                 $editNotices = $this->mTitle->getEditNotices( $this->oldid );
4329                 if ( count( $editNotices ) ) {
4330                         $wgOut->addHTML( implode( "\n", $editNotices ) );
4331                 } else {
4332                         $msg = $this->context->msg( 'editnotice-notext' );
4333                         if ( !$msg->isDisabled() ) {
4334                                 $wgOut->addHTML(
4335                                         '<div class="mw-editnotice-notext">'
4336                                         . $msg->parseAsBlock()
4337                                         . '</div>'
4338                                 );
4339                         }
4340                 }
4341         }
4342
4343         /**
4344          * @since 1.29
4345          */
4346         protected function addTalkPageText() {
4347                 global $wgOut;
4348
4349                 if ( $this->mTitle->isTalkPage() ) {
4350                         $wgOut->addWikiMsg( 'talkpagetext' );
4351                 }
4352         }
4353
4354         /**
4355          * @since 1.29
4356          */
4357         protected function addLongPageWarningHeader() {
4358                 global $wgMaxArticleSize, $wgOut, $wgLang;
4359
4360                 if ( $this->contentLength === false ) {
4361                         $this->contentLength = strlen( $this->textbox1 );
4362                 }
4363
4364                 if ( $this->tooBig || $this->contentLength > $wgMaxArticleSize * 1024 ) {
4365                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
4366                                 [
4367                                         'longpageerror',
4368                                         $wgLang->formatNum( round( $this->contentLength / 1024, 3 ) ),
4369                                         $wgLang->formatNum( $wgMaxArticleSize )
4370                                 ]
4371                         );
4372                 } else {
4373                         if ( !$this->context->msg( 'longpage-hint' )->isDisabled() ) {
4374                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
4375                                         [
4376                                                 'longpage-hint',
4377                                                 $wgLang->formatSize( strlen( $this->textbox1 ) ),
4378                                                 strlen( $this->textbox1 )
4379                                         ]
4380                                 );
4381                         }
4382                 }
4383         }
4384
4385         /**
4386          * @since 1.29
4387          */
4388         protected function addPageProtectionWarningHeaders() {
4389                 global $wgOut;
4390
4391                 if ( $this->mTitle->isProtected( 'edit' ) &&
4392                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
4393                 ) {
4394                         # Is the title semi-protected?
4395                         if ( $this->mTitle->isSemiProtected() ) {
4396                                 $noticeMsg = 'semiprotectedpagewarning';
4397                         } else {
4398                                 # Then it must be protected based on static groups (regular)
4399                                 $noticeMsg = 'protectedpagewarning';
4400                         }
4401                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
4402                                 [ 'lim' => 1, 'msgKey' => [ $noticeMsg ] ] );
4403                 }
4404                 if ( $this->mTitle->isCascadeProtected() ) {
4405                         # Is this page under cascading protection from some source pages?
4406                         /** @var Title[] $cascadeSources */
4407                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
4408                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
4409                         $cascadeSourcesCount = count( $cascadeSources );
4410                         if ( $cascadeSourcesCount > 0 ) {
4411                                 # Explain, and list the titles responsible
4412                                 foreach ( $cascadeSources as $page ) {
4413                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
4414                                 }
4415                         }
4416                         $notice .= '</div>';
4417                         $wgOut->wrapWikiMsg( $notice, [ 'cascadeprotectedwarning', $cascadeSourcesCount ] );
4418                 }
4419                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
4420                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
4421                                 [ 'lim' => 1,
4422                                         'showIfEmpty' => false,
4423                                         'msgKey' => [ 'titleprotectedwarning' ],
4424                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ] );
4425                 }
4426         }
4427
4428         /**
4429          * @param OutputPage $out
4430          * @since 1.29
4431          */
4432         protected function addExplainConflictHeader( OutputPage $out ) {
4433                 $out->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
4434         }
4435
4436         /**
4437          * @param string $name
4438          * @param mixed[] $customAttribs
4439          * @param User $user
4440          * @return mixed[]
4441          * @since 1.29
4442          */
4443         protected function buildTextboxAttribs( $name, array $customAttribs, User $user ) {
4444                 $attribs = $customAttribs + [
4445                                 'accesskey' => ',',
4446                                 'id' => $name,
4447                                 'cols' => 80,
4448                                 'rows' => 25,
4449                                 // Avoid PHP notices when appending preferences
4450                                 // (appending allows customAttribs['style'] to still work).
4451                                 'style' => ''
4452                         ];
4453
4454                 // The following classes can be used here:
4455                 // * mw-editfont-default
4456                 // * mw-editfont-monospace
4457                 // * mw-editfont-sans-serif
4458                 // * mw-editfont-serif
4459                 $class = 'mw-editfont-' . $user->getOption( 'editfont' );
4460
4461                 if ( isset( $attribs['class'] ) ) {
4462                         if ( is_string( $attribs['class'] ) ) {
4463                                 $attribs['class'] .= ' ' . $class;
4464                         } elseif ( is_array( $attribs['class'] ) ) {
4465                                 $attribs['class'][] = $class;
4466                         }
4467                 } else {
4468                         $attribs['class'] = $class;
4469                 }
4470
4471                 $pageLang = $this->mTitle->getPageLanguage();
4472                 $attribs['lang'] = $pageLang->getHtmlCode();
4473                 $attribs['dir'] = $pageLang->getDir();
4474
4475                 return $attribs;
4476         }
4477
4478         /**
4479          * @param string $wikitext
4480          * @return string
4481          * @since 1.29
4482          */
4483         protected function addNewLineAtEnd( $wikitext ) {
4484                 if ( strval( $wikitext ) !== '' ) {
4485                         // Ensure there's a newline at the end, otherwise adding lines
4486                         // is awkward.
4487                         // But don't add a newline if the text is empty, or Firefox in XHTML
4488                         // mode will show an extra newline. A bit annoying.
4489                         $wikitext .= "\n";
4490                         return $wikitext;
4491                 }
4492                 return $wikitext;
4493         }
4494 }