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 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          * @param Article $article
 413          */
 414         public function __construct( Article $article ) {
 415                 $this->mArticle = $article;
 416                 $this->page = $article->getPage(); // model object
 417                 $this->mTitle = $article->getTitle();
 418                 $this->context = $article->getContext();
 419
 420                 $this->contentModel = $this->mTitle->getContentModel();
 421
 422                 $handler = ContentHandler::getForModelID( $this->contentModel );
 423                 $this->contentFormat = $handler->getDefaultFormat();
 424         }
 425
 426         /**
 427          * @return Article
 428          */
 429         public function getArticle() {
 430                 return $this->mArticle;
 431         }
 432
 433         /**
 434          * @since 1.28
 435          * @return IContextSource
 436          */
 437         public function getContext() {
 438                 return $this->context;
 439         }
 440
 441         /**
 442          * @since 1.19
 443          * @return Title
 444          */
 445         public function getTitle() {
 446                 return $this->mTitle;
 447         }
 448
 449         /**
 450          * Set the context Title object
 451          *
 452          * @param Title|null $title Title object or null
 453          */
 454         public function setContextTitle( $title ) {
 455                 $this->mContextTitle = $title;
 456         }
 457
 458         /**
 459          * Get the context title object.
 460          * If not set, $wgTitle will be returned. This behavior might change in
 461          * the future to return $this->mTitle instead.
 462          *
 463          * @return Title
 464          */
 465         public function getContextTitle() {
 466                 if ( is_null( $this->mContextTitle ) ) {
 467                         global $wgTitle;
 468                         return $wgTitle;
 469                 } else {
 470                         return $this->mContextTitle;
 471                 }
 472         }
 473
 474         /**
 475          * Returns if the given content model is editable.
 476          *
 477          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 478          * @return bool
 479          * @throws MWException If $modelId has no known handler
 480          */
 481         public function isSupportedContentModel( $modelId ) {
 482                 return $this->enableApiEditOverride === true ||
 483                         ContentHandler::getForModelID( $modelId )->supportsDirectEditing();
 484         }
 485
 486         /**
 487          * Allow editing of content that supports API direct editing, but not general
 488          * direct editing. Set to false by default.
 489          *
 490          * @param bool $enableOverride
 491          */
 492         public function setApiEditOverride( $enableOverride ) {
 493                 $this->enableApiEditOverride = $enableOverride;
 494         }
 495
 496         function submit() {
 497                 $this->edit();
 498         }
 499
 500         /**
 501          * This is the function that gets called for "action=edit". It
 502          * sets up various member variables, then passes execution to
 503          * another function, usually showEditForm()
 504          *
 505          * The edit form is self-submitting, so that when things like
 506          * preview and edit conflicts occur, we get the same form back
 507          * with the extra stuff added.  Only when the final submission
 508          * is made and all is well do we actually save and redirect to
 509          * the newly-edited page.
 510          */
 511         function edit() {
 512                 global $wgOut, $wgRequest, $wgUser;
 513                 // Allow extensions to modify/prevent this form or submission
 514                 if ( !Hooks::run( 'AlternateEdit', [ $this ] ) ) {
 515                         return;
 516                 }
 517
 518                 wfDebug( __METHOD__ . ": enter\n" );
 519
 520                 // If they used redlink=1 and the page exists, redirect to the main article
 521                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 522                         $wgOut->redirect( $this->mTitle->getFullURL() );
 523                         return;
 524                 }
 525
 526                 $this->importFormData( $wgRequest );
 527                 $this->firsttime = false;
 528
 529                 if ( wfReadOnly() && $this->save ) {
 530                         // Force preview
 531                         $this->save = false;
 532                         $this->preview = true;
 533                 }
 534
 535                 if ( $this->save ) {
 536                         $this->formtype = 'save';
 537                 } elseif ( $this->preview ) {
 538                         $this->formtype = 'preview';
 539                 } elseif ( $this->diff ) {
 540                         $this->formtype = 'diff';
 541                 } else { # First time through
 542                         $this->firsttime = true;
 543                         if ( $this->previewOnOpen() ) {
 544                                 $this->formtype = 'preview';
 545                         } else {
 546                                 $this->formtype = 'initial';
 547                         }
 548                 }
 549
 550                 $permErrors = $this->getEditPermissionErrors( $this->save ? 'secure' : 'full' );
 551                 if ( $permErrors ) {
 552                         wfDebug( __METHOD__ . ": User can't edit\n" );
 553                         // Auto-block user's IP if the account was "hard" blocked
 554                         if ( !wfReadOnly() ) {
 555                                 $user = $wgUser;
 556                                 DeferredUpdates::addCallableUpdate( function () use ( $user ) {
 557                                         $user->spreadAnyEditBlock();
 558                                 } );
 559                         }
 560                         $this->displayPermissionsError( $permErrors );
 561
 562                         return;
 563                 }
 564
 565                 $revision = $this->mArticle->getRevisionFetched();
 566                 // Disallow editing revisions with content models different from the current one
 567                 // Undo edits being an exception in order to allow reverting content model changes.
 568                 if ( $revision
 569                         && $revision->getContentModel() !== $this->contentModel
 570                 ) {
 571                         $prevRev = null;
 572                         if ( $this->undidRev ) {
 573                                 $undidRevObj = Revision::newFromId( $this->undidRev );
 574                                 $prevRev = $undidRevObj ? $undidRevObj->getPrevious() : null;
 575                         }
 576                         if ( !$this->undidRev
 577                                 || !$prevRev
 578                                 || $prevRev->getContentModel() !== $this->contentModel
 579                         ) {
 580                                 $this->displayViewSourcePage(
 581                                         $this->getContentObject(),
 582                                         $this->context->msg(
 583                                                 'contentmodelediterror',
 584                                                 $revision->getContentModel(),
 585                                                 $this->contentModel
 586                                         )->plain()
 587                                 );
 588                                 return;
 589                         }
 590                 }
 591
 592                 $this->isConflict = false;
 593                 // css / js subpages of user pages get a special treatment
 594                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 595                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 596                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 597                 // @todo FIXME: Silly assignment.
 598                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 599
 600                 # Show applicable editing introductions
 601                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 602                         $this->showIntro();
 603                 }
 604
 605                 # Attempt submission here.  This will check for edit conflicts,
 606                 # and redundantly check for locked database, blocked IPs, etc.
 607                 # that edit() already checked just in case someone tries to sneak
 608                 # in the back door with a hand-edited submission URL.
 609
 610                 if ( 'save' == $this->formtype ) {
 611                         $resultDetails = null;
 612                         $status = $this->attemptSave( $resultDetails );
 613                         if ( !$this->handleStatus( $status, $resultDetails ) ) {
 614                                 return;
 615                         }
 616                 }
 617
 618                 # First time through: get contents, set time for conflict
 619                 # checking, etc.
 620                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 621                         if ( $this->initialiseForm() === false ) {
 622                                 $this->noSuchSectionPage();
 623                                 return;
 624                         }
 625
 626                         if ( !$this->mTitle->getArticleID() ) {
 627                                 Hooks::run( 'EditFormPreloadText', [ &$this->textbox1, &$this->mTitle ] );
 628                         } else {
 629                                 Hooks::run( 'EditFormInitialText', [ $this ] );
 630                         }
 631
 632                 }
 633
 634                 $this->showEditForm();
 635         }
 636
 637         /**
 638          * @param string $rigor Same format as Title::getUserPermissionErrors()
 639          * @return array
 640          */
 641         protected function getEditPermissionErrors( $rigor = 'secure' ) {
 642                 global $wgUser;
 643
 644                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser, $rigor );
 645                 # Can this title be created?
 646                 if ( !$this->mTitle->exists() ) {
 647                         $permErrors = array_merge(
 648                                 $permErrors,
 649                                 wfArrayDiff2(
 650                                         $this->mTitle->getUserPermissionsErrors( 'create', $wgUser, $rigor ),
 651                                         $permErrors
 652                                 )
 653                         );
 654                 }
 655                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 656                 $remove = [];
 657                 foreach ( $permErrors as $error ) {
 658                         if ( ( $this->preview || $this->diff )
 659                                 && ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' )
 660                         ) {
 661                                 $remove[] = $error;
 662                         }
 663                 }
 664                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 665
 666                 return $permErrors;
 667         }
 668
 669         /**
 670          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 671          * but with the following differences:
 672          * - If redlink=1, the user will be redirected to the page
 673          * - If there is content to display or the error occurs while either saving,
 674          *   previewing or showing the difference, it will be a
 675          *   "View source for ..." page displaying the source code after the error message.
 676          *
 677          * @since 1.19
 678          * @param array $permErrors Array of permissions errors, as returned by
 679          *    Title::getUserPermissionsErrors().
 680          * @throws PermissionsError
 681          */
 682         protected function displayPermissionsError( array $permErrors ) {
 683                 global $wgRequest, $wgOut;
 684
 685                 if ( $wgRequest->getBool( 'redlink' ) ) {
 686                         // The edit page was reached via a red link.
 687                         // Redirect to the article page and let them click the edit tab if
 688                         // they really want a permission error.
 689                         $wgOut->redirect( $this->mTitle->getFullURL() );
 690                         return;
 691                 }
 692
 693                 $content = $this->getContentObject();
 694
 695                 # Use the normal message if there's nothing to display
 696                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 697                         $action = $this->mTitle->exists() ? 'edit' :
 698                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 699                         throw new PermissionsError( $action, $permErrors );
 700                 }
 701
 702                 $this->displayViewSourcePage(
 703                         $content,
 704                         $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' )
 705                 );
 706         }
 707
 708         /**
 709          * Display a read-only View Source page
 710          * @param Content $content content object
 711          * @param string $errorMessage additional wikitext error message to display
 712          */
 713         protected function displayViewSourcePage( Content $content, $errorMessage = '' ) {
 714                 global $wgOut;
 715
 716                 Hooks::run( 'EditPage::showReadOnlyForm:initial', [ $this, &$wgOut ] );
 717
 718                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 719                 $wgOut->setPageTitle( $this->context->msg(
 720                         'viewsource-title',
 721                         $this->getContextTitle()->getPrefixedText()
 722                 ) );
 723                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 724                 $wgOut->addHTML( $this->editFormPageTop );
 725                 $wgOut->addHTML( $this->editFormTextTop );
 726
 727                 if ( $errorMessage !== '' ) {
 728                         $wgOut->addWikiText( $errorMessage );
 729                         $wgOut->addHTML( "<hr />\n" );
 730                 }
 731
 732                 # If the user made changes, preserve them when showing the markup
 733                 # (This happens when a user is blocked during edit, for instance)
 734                 if ( !$this->firsttime ) {
 735                         $text = $this->textbox1;
 736                         $wgOut->addWikiMsg( 'viewyourtext' );
 737                 } else {
 738                         try {
 739                                 $text = $this->toEditText( $content );
 740                         } catch ( MWException $e ) {
 741                                 # Serialize using the default format if the content model is not supported
 742                                 # (e.g. for an old revision with a different model)
 743                                 $text = $content->serialize();
 744                         }
 745                         $wgOut->addWikiMsg( 'viewsourcetext' );
 746                 }
 747
 748                 $wgOut->addHTML( $this->editFormTextBeforeContent );
 749                 $this->showTextbox( $text, 'wpTextbox1', [ 'readonly' ] );
 750                 $wgOut->addHTML( $this->editFormTextAfterContent );
 751
 752                 $wgOut->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
 753
 754                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 755
 756                 $wgOut->addHTML( $this->editFormTextBottom );
 757                 if ( $this->mTitle->exists() ) {
 758                         $wgOut->returnToMain( null, $this->mTitle );
 759                 }
 760         }
 761
 762         /**
 763          * Should we show a preview when the edit form is first shown?
 764          *
 765          * @return bool
 766          */
 767         protected function previewOnOpen() {
 768                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 769                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 770                         // Explicit override from request
 771                         return true;
 772                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 773                         // Explicit override from request
 774                         return false;
 775                 } elseif ( $this->section == 'new' ) {
 776                         // Nothing *to* preview for new sections
 777                         return false;
 778                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 779                         && $wgUser->getOption( 'previewonfirst' )
 780                 ) {
 781                         // Standard preference behavior
 782                         return true;
 783                 } elseif ( !$this->mTitle->exists()
 784                         && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 785                         && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
 786                 ) {
 787                         // Categories are special
 788                         return true;
 789                 } else {
 790                         return false;
 791                 }
 792         }
 793
 794         /**
 795          * Checks whether the user entered a skin name in uppercase,
 796          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 797          *
 798          * @return bool
 799          */
 800         protected function isWrongCaseCssJsPage() {
 801                 if ( $this->mTitle->isCssJsSubpage() ) {
 802                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 803                         $skins = array_merge(
 804                                 array_keys( Skin::getSkinNames() ),
 805                                 [ 'common' ]
 806                         );
 807                         return !in_array( $name, $skins )
 808                                 && in_array( strtolower( $name ), $skins );
 809                 } else {
 810                         return false;
 811                 }
 812         }
 813
 814         /**
 815          * Returns whether section editing is supported for the current page.
 816          * Subclasses may override this to replace the default behavior, which is
 817          * to check ContentHandler::supportsSections.
 818          *
 819          * @return bool True if this edit page supports sections, false otherwise.
 820          */
 821         protected function isSectionEditSupported() {
 822                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 823                 return $contentHandler->supportsSections();
 824         }
 825
 826         /**
 827          * This function collects the form data and uses it to populate various member variables.
 828          * @param WebRequest $request
 829          * @throws ErrorPageError
 830          */
 831         function importFormData( &$request ) {
 832                 global $wgContLang, $wgUser;
 833
 834                 # Section edit can come from either the form or a link
 835                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 836
 837                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 838                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 839                 }
 840
 841                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 842
 843                 if ( $request->wasPosted() ) {
 844                         # These fields need to be checked for encoding.
 845                         # Also remove trailing whitespace, but don't remove _initial_
 846                         # whitespace from the text boxes. This may be significant formatting.
 847                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 848                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 849                                 // Skip this if wpTextbox2 has input, it indicates that we came
 850                                 // from a conflict page with raw page text, not a custom form
 851                                 // modified by subclasses
 852                                 $textbox1 = $this->importContentFormData( $request );
 853                                 if ( $textbox1 !== null ) {
 854                                         $this->textbox1 = $textbox1;
 855                                 }
 856                         }
 857
 858                         # Truncate for whole multibyte characters
 859                         $this->summary = $wgContLang->truncate( $request->getText( 'wpSummary' ), 255 );
 860
 861                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 862                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 863                         # section titles.
 864                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 865
 866                         # Treat sectiontitle the same way as summary.
 867                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 868                         # currently doing double duty as both edit summary and section title. Right now this
 869                         # is just to allow API edits to work around this limitation, but this should be
 870                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 871                         $this->sectiontitle = $wgContLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 872                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 873
 874                         $this->edittime = $request->getVal( 'wpEdittime' );
 875                         $this->editRevId = $request->getIntOrNull( 'editRevId' );
 876                         $this->starttime = $request->getVal( 'wpStarttime' );
 877
 878                         $undidRev = $request->getInt( 'wpUndidRevision' );
 879                         if ( $undidRev ) {
 880                                 $this->undidRev = $undidRev;
 881                         }
 882
 883                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 884
 885                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 886                                 // wpTextbox1 field is missing, possibly due to being "too big"
 887                                 // according to some filter rules such as Suhosin's setting for
 888                                 // suhosin.request.max_value_length (d'oh)
 889                                 $this->incompleteForm = true;
 890                         } else {
 891                                 // If we receive the last parameter of the request, we can fairly
 892                                 // claim the POST request has not been truncated.
 893
 894                                 // TODO: softened the check for cutover.  Once we determine
 895                                 // that it is safe, we should complete the transition by
 896                                 // removing the "edittime" clause.
 897                                 $this->incompleteForm = ( !$request->getVal( 'wpUltimateParam' )
 898                                         && is_null( $this->edittime ) );
 899                         }
 900                         if ( $this->incompleteForm ) {
 901                                 # If the form is incomplete, force to preview.
 902                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 903                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 904                                 $this->preview = true;
 905                         } else {
 906                                 $this->preview = $request->getCheck( 'wpPreview' );
 907                                 $this->diff = $request->getCheck( 'wpDiff' );
 908
 909                                 // Remember whether a save was requested, so we can indicate
 910                                 // if we forced preview due to session failure.
 911                                 $this->mTriedSave = !$this->preview;
 912
 913                                 if ( $this->tokenOk( $request ) ) {
 914                                         # Some browsers will not report any submit button
 915                                         # if the user hits enter in the comment box.
 916                                         # The unmarked state will be assumed to be a save,
 917                                         # if the form seems otherwise complete.
 918                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 919                                 } elseif ( $this->diff ) {
 920                                         # Failed token check, but only requested "Show Changes".
 921                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 922                                 } else {
 923                                         # Page might be a hack attempt posted from
 924                                         # an external site. Preview instead of saving.
 925                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 926                                         $this->preview = true;
 927                                 }
 928                         }
 929                         $this->save = !$this->preview && !$this->diff;
 930                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 931                                 $this->edittime = null;
 932                         }
 933
 934                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 935                                 $this->starttime = null;
 936                         }
 937
 938                         $this->recreate = $request->getCheck( 'wpRecreate' );
 939
 940                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 941                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 942
 943                         # Don't force edit summaries when a user is editing their own user or talk page
 944                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 945                                 && $this->mTitle->getText() == $wgUser->getName()
 946                         ) {
 947                                 $this->allowBlankSummary = true;
 948                         } else {
 949                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
 950                                         || !$wgUser->getOption( 'forceeditsummary' );
 951                         }
 952
 953                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 954
 955                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
 956                         $this->allowSelfRedirect = $request->getBool( 'wpIgnoreSelfRedirect' );
 957
 958                         $changeTags = $request->getVal( 'wpChangeTags' );
 959                         if ( is_null( $changeTags ) || $changeTags === '' ) {
 960                                 $this->changeTags = [];
 961                         } else {
 962                                 $this->changeTags = array_filter( array_map( 'trim', explode( ',',
 963                                         $changeTags ) ) );
 964                         }
 965                 } else {
 966                         # Not a posted form? Start with nothing.
 967                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 968                         $this->textbox1 = '';
 969                         $this->summary = '';
 970                         $this->sectiontitle = '';
 971                         $this->edittime = '';
 972                         $this->editRevId = null;
 973                         $this->starttime = wfTimestampNow();
 974                         $this->edit = false;
 975                         $this->preview = false;
 976                         $this->save = false;
 977                         $this->diff = false;
 978                         $this->minoredit = false;
 979                         // Watch may be overridden by request parameters
 980                         $this->watchthis = $request->getBool( 'watchthis', false );
 981                         $this->recreate = false;
 982
 983                         // When creating a new section, we can preload a section title by passing it as the
 984                         // preloadtitle parameter in the URL (Bug 13100)
 985                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 986                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 987                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 988                                 $this->summary = $request->getVal( 'preloadtitle' );
 989                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 990                                 $this->summary = $request->getText( 'summary' );
 991                                 if ( $this->summary !== '' ) {
 992                                         $this->hasPresetSummary = true;
 993                                 }
 994                         }
 995
 996                         if ( $request->getVal( 'minor' ) ) {
 997                                 $this->minoredit = true;
 998                         }
 999                 }
1000
1001                 $this->oldid = $request->getInt( 'oldid' );
1002                 $this->parentRevId = $request->getInt( 'parentRevId' );
1003
1004                 $this->bot = $request->getBool( 'bot', true );
1005                 $this->nosummary = $request->getBool( 'nosummary' );
1006
1007                 // May be overridden by revision.
1008                 $this->contentModel = $request->getText( 'model', $this->contentModel );
1009                 // May be overridden by revision.
1010                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
1011
1012                 try {
1013                         $handler = ContentHandler::getForModelID( $this->contentModel );
1014                 } catch ( MWUnknownContentModelException $e ) {
1015                         throw new ErrorPageError(
1016                                 'editpage-invalidcontentmodel-title',
1017                                 'editpage-invalidcontentmodel-text',
1018                                 [ $this->contentModel ]
1019                         );
1020                 }
1021
1022                 if ( !$handler->isSupportedFormat( $this->contentFormat ) ) {
1023                         throw new ErrorPageError(
1024                                 'editpage-notsupportedcontentformat-title',
1025                                 'editpage-notsupportedcontentformat-text',
1026                                 [ $this->contentFormat, ContentHandler::getLocalizedName( $this->contentModel ) ]
1027                         );
1028                 }
1029
1030                 /**
1031                  * @todo Check if the desired model is allowed in this namespace, and if
1032                  *   a transition from the page's current model to the new model is
1033                  *   allowed.
1034                  */
1035
1036                 $this->editintro = $request->getText( 'editintro',
1037                         // Custom edit intro for new sections
1038                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
1039
1040                 // Allow extensions to modify form data
1041                 Hooks::run( 'EditPage::importFormData', [ $this, $request ] );
1042
1043         }
1044
1045         /**
1046          * Subpage overridable method for extracting the page content data from the
1047          * posted form to be placed in $this->textbox1, if using customized input
1048          * this method should be overridden and return the page text that will be used
1049          * for saving, preview parsing and so on...
1050          *
1051          * @param WebRequest $request
1052          * @return string|null
1053          */
1054         protected function importContentFormData( &$request ) {
1055                 return; // Don't do anything, EditPage already extracted wpTextbox1
1056         }
1057
1058         /**
1059          * Initialise form fields in the object
1060          * Called on the first invocation, e.g. when a user clicks an edit link
1061          * @return bool If the requested section is valid
1062          */
1063         function initialiseForm() {
1064                 global $wgUser;
1065                 $this->edittime = $this->page->getTimestamp();
1066                 $this->editRevId = $this->page->getLatest();
1067
1068                 $content = $this->getContentObject( false ); # TODO: track content object?!
1069                 if ( $content === false ) {
1070                         return false;
1071                 }
1072                 $this->textbox1 = $this->toEditText( $content );
1073
1074                 // activate checkboxes if user wants them to be always active
1075                 # Sort out the "watch" checkbox
1076                 if ( $wgUser->getOption( 'watchdefault' ) ) {
1077                         # Watch all edits
1078                         $this->watchthis = true;
1079                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1080                         # Watch creations
1081                         $this->watchthis = true;
1082                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
1083                         # Already watched
1084                         $this->watchthis = true;
1085                 }
1086                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
1087                         $this->minoredit = true;
1088                 }
1089                 if ( $this->textbox1 === false ) {
1090                         return false;
1091                 }
1092                 return true;
1093         }
1094
1095         /**
1096          * @param Content|null $def_content The default value to return
1097          *
1098          * @return Content|null Content on success, $def_content for invalid sections
1099          *
1100          * @since 1.21
1101          */
1102         protected function getContentObject( $def_content = null ) {
1103                 global $wgOut, $wgRequest, $wgUser, $wgContLang;
1104
1105                 $content = false;
1106
1107                 // For message page not locally set, use the i18n message.
1108                 // For other non-existent articles, use preload text if any.
1109                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
1110                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
1111                                 # If this is a system message, get the default text.
1112                                 $msg = $this->mTitle->getDefaultMessageText();
1113
1114                                 $content = $this->toEditContent( $msg );
1115                         }
1116                         if ( $content === false ) {
1117                                 # If requested, preload some text.
1118                                 $preload = $wgRequest->getVal( 'preload',
1119                                         // Custom preload text for new sections
1120                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1121                                 $params = $wgRequest->getArray( 'preloadparams', [] );
1122
1123                                 $content = $this->getPreloadedContent( $preload, $params );
1124                         }
1125                 // For existing pages, get text based on "undo" or section parameters.
1126                 } else {
1127                         if ( $this->section != '' ) {
1128                                 // Get section edit text (returns $def_text for invalid sections)
1129                                 $orig = $this->getOriginalContent( $wgUser );
1130                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1131
1132                                 if ( !$content ) {
1133                                         $content = $def_content;
1134                                 }
1135                         } else {
1136                                 $undoafter = $wgRequest->getInt( 'undoafter' );
1137                                 $undo = $wgRequest->getInt( 'undo' );
1138
1139                                 if ( $undo > 0 && $undoafter > 0 ) {
1140                                         $undorev = Revision::newFromId( $undo );
1141                                         $oldrev = Revision::newFromId( $undoafter );
1142
1143                                         # Sanity check, make sure it's the right page,
1144                                         # the revisions exist and they were not deleted.
1145                                         # Otherwise, $content will be left as-is.
1146                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1147                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1148                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT )
1149                                         ) {
1150                                                 $content = $this->page->getUndoContent( $undorev, $oldrev );
1151
1152                                                 if ( $content === false ) {
1153                                                         # Warn the user that something went wrong
1154                                                         $undoMsg = 'failure';
1155                                                 } else {
1156                                                         $oldContent = $this->page->getContent( Revision::RAW );
1157                                                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
1158                                                         $newContent = $content->preSaveTransform( $this->mTitle, $wgUser, $popts );
1159                                                         if ( $newContent->getModel() !== $oldContent->getModel() ) {
1160                                                                 // The undo may change content
1161                                                                 // model if its reverting the top
1162                                                                 // edit. This can result in
1163                                                                 // mismatched content model/format.
1164                                                                 $this->contentModel = $newContent->getModel();
1165                                                                 $this->contentFormat = $oldrev->getContentFormat();
1166                                                         }
1167
1168                                                         if ( $newContent->equals( $oldContent ) ) {
1169                                                                 # Tell the user that the undo results in no change,
1170                                                                 # i.e. the revisions were already undone.
1171                                                                 $undoMsg = 'nochange';
1172                                                                 $content = false;
1173                                                         } else {
1174                                                                 # Inform the user of our success and set an automatic edit summary
1175                                                                 $undoMsg = 'success';
1176
1177                                                                 # If we just undid one rev, use an autosummary
1178                                                                 $firstrev = $oldrev->getNext();
1179                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1180                                                                         $userText = $undorev->getUserText();
1181                                                                         if ( $userText === '' ) {
1182                                                                                 $undoSummary = $this->context->msg(
1183                                                                                         'undo-summary-username-hidden',
1184                                                                                         $undo
1185                                                                                 )->inContentLanguage()->text();
1186                                                                         } else {
1187                                                                                 $undoSummary = $this->context->msg(
1188                                                                                         'undo-summary',
1189                                                                                         $undo,
1190                                                                                         $userText
1191                                                                                 )->inContentLanguage()->text();
1192                                                                         }
1193                                                                         if ( $this->summary === '' ) {
1194                                                                                 $this->summary = $undoSummary;
1195                                                                         } else {
1196                                                                                 $this->summary = $undoSummary . $this->context->msg( 'colon-separator' )
1197                                                                                         ->inContentLanguage()->text() . $this->summary;
1198                                                                         }
1199                                                                         $this->undidRev = $undo;
1200                                                                 }
1201                                                                 $this->formtype = 'diff';
1202                                                         }
1203                                                 }
1204                                         } else {
1205                                                 // Failed basic sanity checks.
1206                                                 // Older revisions may have been removed since the link
1207                                                 // was created, or we may simply have got bogus input.
1208                                                 $undoMsg = 'norev';
1209                                         }
1210
1211                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1212                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1213                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
1214                                                 $this->context->msg( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1215                                 }
1216
1217                                 if ( $content === false ) {
1218                                         $content = $this->getOriginalContent( $wgUser );
1219                                 }
1220                         }
1221                 }
1222
1223                 return $content;
1224         }
1225
1226         /**
1227          * Get the content of the wanted revision, without section extraction.
1228          *
1229          * The result of this function can be used to compare user's input with
1230          * section replaced in its context (using WikiPage::replaceSectionAtRev())
1231          * to the original text of the edit.
1232          *
1233          * This differs from Article::getContent() that when a missing revision is
1234          * encountered the result will be null and not the
1235          * 'missing-revision' message.
1236          *
1237          * @since 1.19
1238          * @param User $user The user to get the revision for
1239          * @return Content|null
1240          */
1241         private function getOriginalContent( User $user ) {
1242                 if ( $this->section == 'new' ) {
1243                         return $this->getCurrentContent();
1244                 }
1245                 $revision = $this->mArticle->getRevisionFetched();
1246                 if ( $revision === null ) {
1247                         if ( !$this->contentModel ) {
1248                                 $this->contentModel = $this->getTitle()->getContentModel();
1249                         }
1250                         $handler = ContentHandler::getForModelID( $this->contentModel );
1251
1252                         return $handler->makeEmptyContent();
1253                 }
1254                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1255                 return $content;
1256         }
1257
1258         /**
1259          * Get the edit's parent revision ID
1260          *
1261          * The "parent" revision is the ancestor that should be recorded in this
1262          * page's revision history.  It is either the revision ID of the in-memory
1263          * article content, or in the case of a 3-way merge in order to rebase
1264          * across a recoverable edit conflict, the ID of the newer revision to
1265          * which we have rebased this page.
1266          *
1267          * @since 1.27
1268          * @return int Revision ID
1269          */
1270         public function getParentRevId() {
1271                 if ( $this->parentRevId ) {
1272                         return $this->parentRevId;
1273                 } else {
1274                         return $this->mArticle->getRevIdFetched();
1275                 }
1276         }
1277
1278         /**
1279          * Get the current content of the page. This is basically similar to
1280          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1281          * content object is returned instead of null.
1282          *
1283          * @since 1.21
1284          * @return Content
1285          */
1286         protected function getCurrentContent() {
1287                 $rev = $this->page->getRevision();
1288                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1289
1290                 if ( $content === false || $content === null ) {
1291                         if ( !$this->contentModel ) {
1292                                 $this->contentModel = $this->getTitle()->getContentModel();
1293                         }
1294                         $handler = ContentHandler::getForModelID( $this->contentModel );
1295
1296                         return $handler->makeEmptyContent();
1297                 } elseif ( !$this->undidRev ) {
1298                         // Content models should always be the same since we error
1299                         // out if they are different before this point (in ->edit()).
1300                         // The exception being, during an undo, the current revision might
1301                         // differ from the prior revision.
1302                         $logger = LoggerFactory::getInstance( 'editpage' );
1303                         if ( $this->contentModel !== $rev->getContentModel() ) {
1304                                 $logger->warning( "Overriding content model from current edit {prev} to {new}", [
1305                                         'prev' => $this->contentModel,
1306                                         'new' => $rev->getContentModel(),
1307                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1308                                         'method' => __METHOD__
1309                                 ] );
1310                                 $this->contentModel = $rev->getContentModel();
1311                         }
1312
1313                         // Given that the content models should match, the current selected
1314                         // format should be supported.
1315                         if ( !$content->isSupportedFormat( $this->contentFormat ) ) {
1316                                 $logger->warning( "Current revision content format unsupported. Overriding {prev} to {new}", [
1317
1318                                         'prev' => $this->contentFormat,
1319                                         'new' => $rev->getContentFormat(),
1320                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1321                                         'method' => __METHOD__
1322                                 ] );
1323                                 $this->contentFormat = $rev->getContentFormat();
1324                         }
1325                 }
1326                 return $content;
1327         }
1328
1329         /**
1330          * Use this method before edit() to preload some content into the edit box
1331          *
1332          * @param Content $content
1333          *
1334          * @since 1.21
1335          */
1336         public function setPreloadedContent( Content $content ) {
1337                 $this->mPreloadContent = $content;
1338         }
1339
1340         /**
1341          * Get the contents to be preloaded into the box, either set by
1342          * an earlier setPreloadText() or by loading the given page.
1343          *
1344          * @param string $preload Representing the title to preload from.
1345          * @param array $params Parameters to use (interface-message style) in the preloaded text
1346          *
1347          * @return Content
1348          *
1349          * @since 1.21
1350          */
1351         protected function getPreloadedContent( $preload, $params = [] ) {
1352                 global $wgUser;
1353
1354                 if ( !empty( $this->mPreloadContent ) ) {
1355                         return $this->mPreloadContent;
1356                 }
1357
1358                 $handler = ContentHandler::getForModelID( $this->contentModel );
1359
1360                 if ( $preload === '' ) {
1361                         return $handler->makeEmptyContent();
1362                 }
1363
1364                 $title = Title::newFromText( $preload );
1365                 # Check for existence to avoid getting MediaWiki:Noarticletext
1366                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1367                         // TODO: somehow show a warning to the user!
1368                         return $handler->makeEmptyContent();
1369                 }
1370
1371                 $page = WikiPage::factory( $title );
1372                 if ( $page->isRedirect() ) {
1373                         $title = $page->getRedirectTarget();
1374                         # Same as before
1375                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1376                                 // TODO: somehow show a warning to the user!
1377                                 return $handler->makeEmptyContent();
1378                         }
1379                         $page = WikiPage::factory( $title );
1380                 }
1381
1382                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1383                 $content = $page->getContent( Revision::RAW );
1384
1385                 if ( !$content ) {
1386                         // TODO: somehow show a warning to the user!
1387                         return $handler->makeEmptyContent();
1388                 }
1389
1390                 if ( $content->getModel() !== $handler->getModelID() ) {
1391                         $converted = $content->convert( $handler->getModelID() );
1392
1393                         if ( !$converted ) {
1394                                 // TODO: somehow show a warning to the user!
1395                                 wfDebug( "Attempt to preload incompatible content: " .
1396                                         "can't convert " . $content->getModel() .
1397                                         " to " . $handler->getModelID() );
1398
1399                                 return $handler->makeEmptyContent();
1400                         }
1401
1402                         $content = $converted;
1403                 }
1404
1405                 return $content->preloadTransform( $title, $parserOptions, $params );
1406         }
1407
1408         /**
1409          * Make sure the form isn't faking a user's credentials.
1410          *
1411          * @param WebRequest $request
1412          * @return bool
1413          * @private
1414          */
1415         function tokenOk( &$request ) {
1416                 global $wgUser;
1417                 $token = $request->getVal( 'wpEditToken' );
1418                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1419                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1420                 return $this->mTokenOk;
1421         }
1422
1423         /**
1424          * Sets post-edit cookie indicating the user just saved a particular revision.
1425          *
1426          * This uses a temporary cookie for each revision ID so separate saves will never
1427          * interfere with each other.
1428          *
1429          * The cookie is deleted in the mediawiki.action.view.postEdit JS module after
1430          * the redirect.  It must be clearable by JavaScript code, so it must not be
1431          * marked HttpOnly. The JavaScript code converts the cookie to a wgPostEdit config
1432          * variable.
1433          *
1434          * If the variable were set on the server, it would be cached, which is unwanted
1435          * since the post-edit state should only apply to the load right after the save.
1436          *
1437          * @param int $statusValue The status value (to check for new article status)
1438          */
1439         protected function setPostEditCookie( $statusValue ) {
1440                 $revisionId = $this->page->getLatest();
1441                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1442
1443                 $val = 'saved';
1444                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1445                         $val = 'created';
1446                 } elseif ( $this->oldid ) {
1447                         $val = 'restored';
1448                 }
1449
1450                 $response = RequestContext::getMain()->getRequest()->response();
1451                 $response->setCookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION, [
1452                         'httpOnly' => false,
1453                 ] );
1454         }
1455
1456         /**
1457          * Attempt submission
1458          * @param array|bool $resultDetails See docs for $result in internalAttemptSave
1459          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1460          * @return Status The resulting status object.
1461          */
1462         public function attemptSave( &$resultDetails = false ) {
1463                 global $wgUser;
1464
1465                 # Allow bots to exempt some edits from bot flagging
1466                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1467                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1468
1469                 Hooks::run( 'EditPage::attemptSave:after', [ $this, $status, $resultDetails ] );
1470
1471                 return $status;
1472         }
1473
1474         /**
1475          * Handle status, such as after attempt save
1476          *
1477          * @param Status $status
1478          * @param array|bool $resultDetails
1479          *
1480          * @throws ErrorPageError
1481          * @return bool False, if output is done, true if rest of the form should be displayed
1482          */
1483         private function handleStatus( Status $status, $resultDetails ) {
1484                 global $wgUser, $wgOut;
1485
1486                 /**
1487                  * @todo FIXME: once the interface for internalAttemptSave() is made
1488                  *   nicer, this should use the message in $status
1489                  */
1490                 if ( $status->value == self::AS_SUCCESS_UPDATE
1491                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1492                 ) {
1493                         $this->didSave = true;
1494                         if ( !$resultDetails['nullEdit'] ) {
1495                                 $this->setPostEditCookie( $status->value );
1496                         }
1497                 }
1498
1499                 // "wpExtraQueryRedirect" is a hidden input to modify
1500                 // after save URL and is not used by actual edit form
1501                 $request = RequestContext::getMain()->getRequest();
1502                 $extraQueryRedirect = $request->getVal( 'wpExtraQueryRedirect' );
1503
1504                 switch ( $status->value ) {
1505                         case self::AS_HOOK_ERROR_EXPECTED:
1506                         case self::AS_CONTENT_TOO_BIG:
1507                         case self::AS_ARTICLE_WAS_DELETED:
1508                         case self::AS_CONFLICT_DETECTED:
1509                         case self::AS_SUMMARY_NEEDED:
1510                         case self::AS_TEXTBOX_EMPTY:
1511                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1512                         case self::AS_END:
1513                         case self::AS_BLANK_ARTICLE:
1514                         case self::AS_SELF_REDIRECT:
1515                                 return true;
1516
1517                         case self::AS_HOOK_ERROR:
1518                                 return false;
1519
1520                         case self::AS_CANNOT_USE_CUSTOM_MODEL:
1521                         case self::AS_PARSE_ERROR:
1522                                 $wgOut->addWikiText( '<div class="error">' . "\n" . $status->getWikiText() . '</div>' );
1523                                 return true;
1524
1525                         case self::AS_SUCCESS_NEW_ARTICLE:
1526                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1527                                 if ( $extraQueryRedirect ) {
1528                                         if ( $query === '' ) {
1529                                                 $query = $extraQueryRedirect;
1530                                         } else {
1531                                                 $query = $query . '&' . $extraQueryRedirect;
1532                                         }
1533                                 }
1534                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1535                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1536                                 return false;
1537
1538                         case self::AS_SUCCESS_UPDATE:
1539                                 $extraQuery = '';
1540                                 $sectionanchor = $resultDetails['sectionanchor'];
1541
1542                                 // Give extensions a chance to modify URL query on update
1543                                 Hooks::run(
1544                                         'ArticleUpdateBeforeRedirect',
1545                                         [ $this->mArticle, &$sectionanchor, &$extraQuery ]
1546                                 );
1547
1548                                 if ( $resultDetails['redirect'] ) {
1549                                         if ( $extraQuery == '' ) {
1550                                                 $extraQuery = 'redirect=no';
1551                                         } else {
1552                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1553                                         }
1554                                 }
1555                                 if ( $extraQueryRedirect ) {
1556                                         if ( $extraQuery === '' ) {
1557                                                 $extraQuery = $extraQueryRedirect;
1558                                         } else {
1559                                                 $extraQuery = $extraQuery . '&' . $extraQueryRedirect;
1560                                         }
1561                                 }
1562
1563                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1564                                 return false;
1565
1566                         case self::AS_SPAM_ERROR:
1567                                 $this->spamPageWithContent( $resultDetails['spam'] );
1568                                 return false;
1569
1570                         case self::AS_BLOCKED_PAGE_FOR_USER:
1571                                 throw new UserBlockedError( $wgUser->getBlock() );
1572
1573                         case self::AS_IMAGE_REDIRECT_ANON:
1574                         case self::AS_IMAGE_REDIRECT_LOGGED:
1575                                 throw new PermissionsError( 'upload' );
1576
1577                         case self::AS_READ_ONLY_PAGE_ANON:
1578                         case self::AS_READ_ONLY_PAGE_LOGGED:
1579                                 throw new PermissionsError( 'edit' );
1580
1581                         case self::AS_READ_ONLY_PAGE:
1582                                 throw new ReadOnlyError;
1583
1584                         case self::AS_RATE_LIMITED:
1585                                 throw new ThrottledError();
1586
1587                         case self::AS_NO_CREATE_PERMISSION:
1588                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1589                                 throw new PermissionsError( $permission );
1590
1591                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1592                                 throw new PermissionsError( 'editcontentmodel' );
1593
1594                         default:
1595                                 // We don't recognize $status->value. The only way that can happen
1596                                 // is if an extension hook aborted from inside ArticleSave.
1597                                 // Render the status object into $this->hookError
1598                                 // FIXME this sucks, we should just use the Status object throughout
1599                                 $this->hookError = '<div class="error">' ."\n" . $status->getWikiText() .
1600                                         '</div>';
1601                                 return true;
1602                 }
1603         }
1604
1605         /**
1606          * Run hooks that can filter edits just before they get saved.
1607          *
1608          * @param Content $content The Content to filter.
1609          * @param Status $status For reporting the outcome to the caller
1610          * @param User $user The user performing the edit
1611          *
1612          * @return bool
1613          */
1614         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1615                 // Run old style post-section-merge edit filter
1616                 if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged',
1617                         [ $this, $content, &$this->hookError, $this->summary ],
1618                         '1.21'
1619                 ) ) {
1620                         # Error messages etc. could be handled within the hook...
1621                         $status->fatal( 'hookaborted' );
1622                         $status->value = self::AS_HOOK_ERROR;
1623                         return false;
1624                 } elseif ( $this->hookError != '' ) {
1625                         # ...or the hook could be expecting us to produce an error
1626                         $status->fatal( 'hookaborted' );
1627                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1628                         return false;
1629                 }
1630
1631                 // Run new style post-section-merge edit filter
1632                 if ( !Hooks::run( 'EditFilterMergedContent',
1633                                 [ $this->mArticle->getContext(), $content, $status, $this->summary,
1634                                 $user, $this->minoredit ] )
1635                 ) {
1636                         # Error messages etc. could be handled within the hook...
1637                         if ( $status->isGood() ) {
1638                                 $status->fatal( 'hookaborted' );
1639                                 // Not setting $this->hookError here is a hack to allow the hook
1640                                 // to cause a return to the edit page without $this->hookError
1641                                 // being set. This is used by ConfirmEdit to display a captcha
1642                                 // without any error message cruft.
1643                         } else {
1644                                 $this->hookError = $this->formatStatusErrors( $status );
1645                         }
1646                         // Use the existing $status->value if the hook set it
1647                         if ( !$status->value ) {
1648                                 $status->value = self::AS_HOOK_ERROR;
1649                         }
1650                         return false;
1651                 } elseif ( !$status->isOK() ) {
1652                         # ...or the hook could be expecting us to produce an error
1653                         // FIXME this sucks, we should just use the Status object throughout
1654                         $this->hookError = $this->formatStatusErrors( $status );
1655                         $status->fatal( 'hookaborted' );
1656                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1657                         return false;
1658                 }
1659
1660                 return true;
1661         }
1662
1663         /**
1664          * Wrap status errors in an errorbox for increased visiblity
1665          *
1666          * @param Status $status
1667          * @return string
1668          */
1669         private function formatStatusErrors( Status $status ) {
1670                 $errmsg = $status->getHTML(
1671                         'edit-error-short',
1672                         'edit-error-long',
1673                         $this->context->getLanguage()
1674                 );
1675                 return <<<ERROR
1676 <div class="errorbox">
1677 {$errmsg}
1678 </div>
1679 <br clear="all" />
1680 ERROR;
1681         }
1682
1683         /**
1684          * Return the summary to be used for a new section.
1685          *
1686          * @param string $sectionanchor Set to the section anchor text
1687          * @return string
1688          */
1689         private function newSectionSummary( &$sectionanchor = null ) {
1690                 global $wgParser;
1691
1692                 if ( $this->sectiontitle !== '' ) {
1693                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1694                         // If no edit summary was specified, create one automatically from the section
1695                         // title and have it link to the new section. Otherwise, respect the summary as
1696                         // passed.
1697                         if ( $this->summary === '' ) {
1698                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1699                                 return $this->context->msg( 'newsectionsummary' )
1700                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1701                         }
1702                 } elseif ( $this->summary !== '' ) {
1703                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1704                         # This is a new section, so create a link to the new section
1705                         # in the revision summary.
1706                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1707                         return $this->context->msg( 'newsectionsummary' )
1708                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1709                 }
1710                 return $this->summary;
1711         }
1712
1713         /**
1714          * Attempt submission (no UI)
1715          *
1716          * @param array $result Array to add statuses to, currently with the
1717          *   possible keys:
1718          *   - spam (string): Spam string from content if any spam is detected by
1719          *     matchSpamRegex.
1720          *   - sectionanchor (string): Section anchor for a section save.
1721          *   - nullEdit (boolean): Set if doEditContent is OK.  True if null edit,
1722          *     false otherwise.
1723          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1724          *     revision is a redirect.
1725          * @param bool $bot True if edit is being made under the bot right.
1726          *
1727          * @return Status Status object, possibly with a message, but always with
1728          *   one of the AS_* constants in $status->value,
1729          *
1730          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1731          *   various error display idiosyncrasies. There are also lots of cases
1732          *   where error metadata is set in the object and retrieved later instead
1733          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1734          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1735          * time.
1736          */
1737         function internalAttemptSave( &$result, $bot = false ) {
1738                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1739                 global $wgContentHandlerUseDB;
1740
1741                 $status = Status::newGood();
1742
1743                 if ( !Hooks::run( 'EditPage::attemptSave', [ $this ] ) ) {
1744                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1745                         $status->fatal( 'hookaborted' );
1746                         $status->value = self::AS_HOOK_ERROR;
1747                         return $status;
1748                 }
1749
1750                 $spam = $wgRequest->getText( 'wpAntispam' );
1751                 if ( $spam !== '' ) {
1752                         wfDebugLog(
1753                                 'SimpleAntiSpam',
1754                                 $wgUser->getName() .
1755                                 ' editing "' .
1756                                 $this->mTitle->getPrefixedText() .
1757                                 '" submitted bogus field "' .
1758                                 $spam .
1759                                 '"'
1760                         );
1761                         $status->fatal( 'spamprotectionmatch', false );
1762                         $status->value = self::AS_SPAM_ERROR;
1763                         return $status;
1764                 }
1765
1766                 try {
1767                         # Construct Content object
1768                         $textbox_content = $this->toEditContent( $this->textbox1 );
1769                 } catch ( MWContentSerializationException $ex ) {
1770                         $status->fatal(
1771                                 'content-failed-to-parse',
1772                                 $this->contentModel,
1773                                 $this->contentFormat,
1774                                 $ex->getMessage()
1775                         );
1776                         $status->value = self::AS_PARSE_ERROR;
1777                         return $status;
1778                 }
1779
1780                 # Check image redirect
1781                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1782                         $textbox_content->isRedirect() &&
1783                         !$wgUser->isAllowed( 'upload' )
1784                 ) {
1785                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1786                                 $status->setResult( false, $code );
1787
1788                                 return $status;
1789                 }
1790
1791                 # Check for spam
1792                 $match = self::matchSummarySpamRegex( $this->summary );
1793                 if ( $match === false && $this->section == 'new' ) {
1794                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1795                         # regular summaries, it is added to the actual wikitext.
1796                         if ( $this->sectiontitle !== '' ) {
1797                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1798                                 $match = self::matchSpamRegex( $this->sectiontitle );
1799                         } else {
1800                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1801                                 # is used with the 'summary' parameter.
1802                                 $match = self::matchSpamRegex( $this->summary );
1803                         }
1804                 }
1805                 if ( $match === false ) {
1806                         $match = self::matchSpamRegex( $this->textbox1 );
1807                 }
1808                 if ( $match !== false ) {
1809                         $result['spam'] = $match;
1810                         $ip = $wgRequest->getIP();
1811                         $pdbk = $this->mTitle->getPrefixedDBkey();
1812                         $match = str_replace( "\n", '', $match );
1813                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1814                         $status->fatal( 'spamprotectionmatch', $match );
1815                         $status->value = self::AS_SPAM_ERROR;
1816                         return $status;
1817                 }
1818                 if ( !Hooks::run(
1819                         'EditFilter',
1820                         [ $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ] )
1821                 ) {
1822                         # Error messages etc. could be handled within the hook...
1823                         $status->fatal( 'hookaborted' );
1824                         $status->value = self::AS_HOOK_ERROR;
1825                         return $status;
1826                 } elseif ( $this->hookError != '' ) {
1827                         # ...or the hook could be expecting us to produce an error
1828                         $status->fatal( 'hookaborted' );
1829                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1830                         return $status;
1831                 }
1832
1833                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1834                         // Auto-block user's IP if the account was "hard" blocked
1835                         if ( !wfReadOnly() ) {
1836                                 $wgUser->spreadAnyEditBlock();
1837                         }
1838                         # Check block state against master, thus 'false'.
1839                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1840                         return $status;
1841                 }
1842
1843                 $this->contentLength = strlen( $this->textbox1 );
1844                 if ( $this->contentLength > $wgMaxArticleSize * 1024 ) {
1845                         // Error will be displayed by showEditForm()
1846                         $this->tooBig = true;
1847                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1848                         return $status;
1849                 }
1850
1851                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1852                         if ( $wgUser->isAnon() ) {
1853                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1854                                 return $status;
1855                         } else {
1856                                 $status->fatal( 'readonlytext' );
1857                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1858                                 return $status;
1859                         }
1860                 }
1861
1862                 $changingContentModel = false;
1863                 if ( $this->contentModel !== $this->mTitle->getContentModel() ) {
1864                         if ( !$wgContentHandlerUseDB ) {
1865                                 $status->fatal( 'editpage-cannot-use-custom-model' );
1866                                 $status->value = self::AS_CANNOT_USE_CUSTOM_MODEL;
1867                                 return $status;
1868                         } elseif ( !$wgUser->isAllowed( 'editcontentmodel' ) ) {
1869                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1870                                 return $status;
1871                         }
1872                         // Make sure the user can edit the page under the new content model too
1873                         $titleWithNewContentModel = clone $this->mTitle;
1874                         $titleWithNewContentModel->setContentModel( $this->contentModel );
1875                         if ( !$titleWithNewContentModel->userCan( 'editcontentmodel', $wgUser )
1876                                 || !$titleWithNewContentModel->userCan( 'edit', $wgUser )
1877                         ) {
1878                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1879                                 return $status;
1880                         }
1881
1882                         $changingContentModel = true;
1883                         $oldContentModel = $this->mTitle->getContentModel();
1884                 }
1885
1886                 if ( $this->changeTags ) {
1887                         $changeTagsStatus = ChangeTags::canAddTagsAccompanyingChange(
1888                                 $this->changeTags, $wgUser );
1889                         if ( !$changeTagsStatus->isOK() ) {
1890                                 $changeTagsStatus->value = self::AS_CHANGE_TAG_ERROR;
1891                                 return $changeTagsStatus;
1892                         }
1893                 }
1894
1895                 if ( wfReadOnly() ) {
1896                         $status->fatal( 'readonlytext' );
1897                         $status->value = self::AS_READ_ONLY_PAGE;
1898                         return $status;
1899                 }
1900                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 )
1901                         || ( $changingContentModel && $wgUser->pingLimiter( 'editcontentmodel' ) )
1902                 ) {
1903                         $status->fatal( 'actionthrottledtext' );
1904                         $status->value = self::AS_RATE_LIMITED;
1905                         return $status;
1906                 }
1907
1908                 # If the article has been deleted while editing, don't save it without
1909                 # confirmation
1910                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1911                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1912                         return $status;
1913                 }
1914
1915                 # Load the page data from the master. If anything changes in the meantime,
1916                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1917                 $this->page->loadPageData( 'fromdbmaster' );
1918                 $new = !$this->page->exists();
1919
1920                 if ( $new ) {
1921                         // Late check for create permission, just in case *PARANOIA*
1922                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1923                                 $status->fatal( 'nocreatetext' );
1924                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1925                                 wfDebug( __METHOD__ . ": no create permission\n" );
1926                                 return $status;
1927                         }
1928
1929                         // Don't save a new page if it's blank or if it's a MediaWiki:
1930                         // message with content equivalent to default (allow empty pages
1931                         // in this case to disable messages, see bug 50124)
1932                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1933                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1934                                 $defaultText = $defaultMessageText;
1935                         } else {
1936                                 $defaultText = '';
1937                         }
1938
1939                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
1940                                 $this->blankArticle = true;
1941                                 $status->fatal( 'blankarticle' );
1942                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1943                                 return $status;
1944                         }
1945
1946                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1947                                 return $status;
1948                         }
1949
1950                         $content = $textbox_content;
1951
1952                         $result['sectionanchor'] = '';
1953                         if ( $this->section == 'new' ) {
1954                                 if ( $this->sectiontitle !== '' ) {
1955                                         // Insert the section title above the content.
1956                                         $content = $content->addSectionHeader( $this->sectiontitle );
1957                                 } elseif ( $this->summary !== '' ) {
1958                                         // Insert the section title above the content.
1959                                         $content = $content->addSectionHeader( $this->summary );
1960                                 }
1961                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
1962                         }
1963
1964                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1965
1966                 } else { # not $new
1967
1968                         # Article exists. Check for edit conflict.
1969
1970                         $this->page->clear(); # Force reload of dates, etc.
1971                         $timestamp = $this->page->getTimestamp();
1972                         $latest = $this->page->getLatest();
1973
1974                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1975
1976                         // Check editRevId if set, which handles same-second timestamp collisions
1977                         if ( $timestamp != $this->edittime
1978                                 || ( $this->editRevId !== null && $this->editRevId != $latest )
1979                         ) {
1980                                 $this->isConflict = true;
1981                                 if ( $this->section == 'new' ) {
1982                                         if ( $this->page->getUserText() == $wgUser->getName() &&
1983                                                 $this->page->getComment() == $this->newSectionSummary()
1984                                         ) {
1985                                                 // Probably a duplicate submission of a new comment.
1986                                                 // This can happen when CDN resends a request after
1987                                                 // a timeout but the first one actually went through.
1988                                                 wfDebug( __METHOD__
1989                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
1990                                         } else {
1991                                                 // New comment; suppress conflict.
1992                                                 $this->isConflict = false;
1993                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1994                                         }
1995                                 } elseif ( $this->section == ''
1996                                         && Revision::userWasLastToEdit(
1997                                                 DB_MASTER, $this->mTitle->getArticleID(),
1998                                                 $wgUser->getId(), $this->edittime
1999                                         )
2000                                 ) {
2001                                         # Suppress edit conflict with self, except for section edits where merging is required.
2002                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
2003                                         $this->isConflict = false;
2004                                 }
2005                         }
2006
2007                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
2008                         if ( $this->sectiontitle !== '' ) {
2009                                 $sectionTitle = $this->sectiontitle;
2010                         } else {
2011                                 $sectionTitle = $this->summary;
2012                         }
2013
2014                         $content = null;
2015
2016                         if ( $this->isConflict ) {
2017                                 wfDebug( __METHOD__
2018                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
2019                                         . " (id '{$this->editRevId}') (article time '{$timestamp}')\n" );
2020                                 // @TODO: replaceSectionAtRev() with base ID (not prior current) for ?oldid=X case
2021                                 // ...or disable section editing for non-current revisions (not exposed anyway).
2022                                 if ( $this->editRevId !== null ) {
2023                                         $content = $this->page->replaceSectionAtRev(
2024                                                 $this->section,
2025                                                 $textbox_content,
2026                                                 $sectionTitle,
2027                                                 $this->editRevId
2028                                         );
2029                                 } else {
2030                                         $content = $this->page->replaceSectionContent(
2031                                                 $this->section,
2032                                                 $textbox_content,
2033                                                 $sectionTitle,
2034                                                 $this->edittime
2035                                         );
2036                                 }
2037                         } else {
2038                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
2039                                 $content = $this->page->replaceSectionContent(
2040                                         $this->section,
2041                                         $textbox_content,
2042                                         $sectionTitle
2043                                 );
2044                         }
2045
2046                         if ( is_null( $content ) ) {
2047                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
2048                                 $this->isConflict = true;
2049                                 $content = $textbox_content; // do not try to merge here!
2050                         } elseif ( $this->isConflict ) {
2051                                 # Attempt merge
2052                                 if ( $this->mergeChangesIntoContent( $content ) ) {
2053                                         // Successful merge! Maybe we should tell the user the good news?
2054                                         $this->isConflict = false;
2055                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
2056                                 } else {
2057                                         $this->section = '';
2058                                         $this->textbox1 = ContentHandler::getContentText( $content );
2059                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
2060                                 }
2061                         }
2062
2063                         if ( $this->isConflict ) {
2064                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
2065                                 return $status;
2066                         }
2067
2068                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
2069                                 return $status;
2070                         }
2071
2072                         if ( $this->section == 'new' ) {
2073                                 // Handle the user preference to force summaries here
2074                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
2075                                         $this->missingSummary = true;
2076                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
2077                                         $status->value = self::AS_SUMMARY_NEEDED;
2078                                         return $status;
2079                                 }
2080
2081                                 // Do not allow the user to post an empty comment
2082                                 if ( $this->textbox1 == '' ) {
2083                                         $this->missingComment = true;
2084                                         $status->fatal( 'missingcommenttext' );
2085                                         $status->value = self::AS_TEXTBOX_EMPTY;
2086                                         return $status;
2087                                 }
2088                         } elseif ( !$this->allowBlankSummary
2089                                 && !$content->equals( $this->getOriginalContent( $wgUser ) )
2090                                 && !$content->isRedirect()
2091                                 && md5( $this->summary ) == $this->autoSumm
2092                         ) {
2093                                 $this->missingSummary = true;
2094                                 $status->fatal( 'missingsummary' );
2095                                 $status->value = self::AS_SUMMARY_NEEDED;
2096                                 return $status;
2097                         }
2098
2099                         # All's well
2100                         $sectionanchor = '';
2101                         if ( $this->section == 'new' ) {
2102                                 $this->summary = $this->newSectionSummary( $sectionanchor );
2103                         } elseif ( $this->section != '' ) {
2104                                 # Try to get a section anchor from the section source, redirect
2105                                 # to edited section if header found.
2106                                 # XXX: Might be better to integrate this into Article::replaceSectionAtRev
2107                                 # for duplicate heading checking and maybe parsing.
2108                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
2109                                 # We can't deal with anchors, includes, html etc in the header for now,
2110                                 # headline would need to be parsed to improve this.
2111                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
2112                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
2113                                 }
2114                         }
2115                         $result['sectionanchor'] = $sectionanchor;
2116
2117                         // Save errors may fall down to the edit form, but we've now
2118                         // merged the section into full text. Clear the section field
2119                         // so that later submission of conflict forms won't try to
2120                         // replace that into a duplicated mess.
2121                         $this->textbox1 = $this->toEditText( $content );
2122                         $this->section = '';
2123
2124                         $status->value = self::AS_SUCCESS_UPDATE;
2125                 }
2126
2127                 if ( !$this->allowSelfRedirect
2128                         && $content->isRedirect()
2129                         && $content->getRedirectTarget()->equals( $this->getTitle() )
2130                 ) {
2131                         // If the page already redirects to itself, don't warn.
2132                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
2133                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
2134                                 $this->selfRedirect = true;
2135                                 $status->fatal( 'selfredirect' );
2136                                 $status->value = self::AS_SELF_REDIRECT;
2137                                 return $status;
2138                         }
2139                 }
2140
2141                 // Check for length errors again now that the section is merged in
2142                 $this->contentLength = strlen( $this->toEditText( $content ) );
2143                 if ( $this->contentLength > $wgMaxArticleSize * 1024 ) {
2144                         $this->tooBig = true;
2145                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
2146                         return $status;
2147                 }
2148
2149                 $flags = EDIT_AUTOSUMMARY |
2150                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
2151                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
2152                         ( $bot ? EDIT_FORCE_BOT : 0 );
2153
2154                 $doEditStatus = $this->page->doEditContent(
2155                         $content,
2156                         $this->summary,
2157                         $flags,
2158                         false,
2159                         $wgUser,
2160                         $content->getDefaultFormat(),
2161                         $this->changeTags
2162                 );
2163
2164                 if ( !$doEditStatus->isOK() ) {
2165                         // Failure from doEdit()
2166                         // Show the edit conflict page for certain recognized errors from doEdit(),
2167                         // but don't show it for errors from extension hooks
2168                         $errors = $doEditStatus->getErrorsArray();
2169                         if ( in_array( $errors[0][0],
2170                                         [ 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ] )
2171                         ) {
2172                                 $this->isConflict = true;
2173                                 // Destroys data doEdit() put in $status->value but who cares
2174                                 $doEditStatus->value = self::AS_END;
2175                         }
2176                         return $doEditStatus;
2177                 }
2178
2179                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
2180                 if ( $result['nullEdit'] ) {
2181                         // We don't know if it was a null edit until now, so increment here
2182                         $wgUser->pingLimiter( 'linkpurge' );
2183                 }
2184                 $result['redirect'] = $content->isRedirect();
2185
2186                 $this->updateWatchlist();
2187
2188                 // If the content model changed, add a log entry
2189                 if ( $changingContentModel ) {
2190                         $this->addContentModelChangeLogEntry(
2191                                 $wgUser,
2192                                 $new ? false : $oldContentModel,
2193                                 $this->contentModel,
2194                                 $this->summary
2195                         );
2196                 }
2197
2198                 return $status;
2199         }
2200
2201         /**
2202          * @param User $user
2203          * @param string|false $oldModel false if the page is being newly created
2204          * @param string $newModel
2205          * @param string $reason
2206          */
2207         protected function addContentModelChangeLogEntry( User $user, $oldModel, $newModel, $reason ) {
2208                 $new = $oldModel === false;
2209                 $log = new ManualLogEntry( 'contentmodel', $new ? 'new' : 'change' );
2210                 $log->setPerformer( $user );
2211                 $log->setTarget( $this->mTitle );
2212                 $log->setComment( $reason );
2213                 $log->setParameters( [
2214                         '4::oldmodel' => $oldModel,
2215                         '5::newmodel' => $newModel
2216                 ] );
2217                 $logid = $log->insert();
2218                 $log->publish( $logid );
2219         }
2220
2221         /**
2222          * Register the change of watch status
2223          */
2224         protected function updateWatchlist() {
2225                 global $wgUser;
2226
2227                 if ( !$wgUser->isLoggedIn() ) {
2228                         return;
2229                 }
2230
2231                 $user = $wgUser;
2232                 $title = $this->mTitle;
2233                 $watch = $this->watchthis;
2234                 // Do this in its own transaction to reduce contention...
2235                 DeferredUpdates::addCallableUpdate( function () use ( $user, $title, $watch ) {
2236                         if ( $watch == $user->isWatched( $title, User::IGNORE_USER_RIGHTS ) ) {
2237                                 return; // nothing to change
2238                         }
2239                         WatchAction::doWatchOrUnwatch( $watch, $title, $user );
2240                 } );
2241         }
2242
2243         /**
2244          * Attempts to do 3-way merge of edit content with a base revision
2245          * and current content, in case of edit conflict, in whichever way appropriate
2246          * for the content type.
2247          *
2248          * @since 1.21
2249          *
2250          * @param Content $editContent
2251          *
2252          * @return bool
2253          */
2254         private function mergeChangesIntoContent( &$editContent ) {
2255
2256                 $db = wfGetDB( DB_MASTER );
2257
2258                 // This is the revision the editor started from
2259                 $baseRevision = $this->getBaseRevision();
2260                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
2261
2262                 if ( is_null( $baseContent ) ) {
2263                         return false;
2264                 }
2265
2266                 // The current state, we want to merge updates into it
2267                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2268                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2269
2270                 if ( is_null( $currentContent ) ) {
2271                         return false;
2272                 }
2273
2274                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2275
2276                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2277
2278                 if ( $result ) {
2279                         $editContent = $result;
2280                         // Update parentRevId to what we just merged.
2281                         $this->parentRevId = $currentRevision->getId();
2282                         return true;
2283                 }
2284
2285                 return false;
2286         }
2287
2288         /**
2289          * @note: this method is very poorly named. If the user opened the form with ?oldid=X,
2290          *        one might think of X as the "base revision", which is NOT what this returns.
2291          * @return Revision Current version when the edit was started
2292          */
2293         function getBaseRevision() {
2294                 if ( !$this->mBaseRevision ) {
2295                         $db = wfGetDB( DB_MASTER );
2296                         $this->mBaseRevision = $this->editRevId
2297                                 ? Revision::newFromId( $this->editRevId, Revision::READ_LATEST )
2298                                 : Revision::loadFromTimestamp( $db, $this->mTitle, $this->edittime );
2299                 }
2300                 return $this->mBaseRevision;
2301         }
2302
2303         /**
2304          * Check given input text against $wgSpamRegex, and return the text of the first match.
2305          *
2306          * @param string $text
2307          *
2308          * @return string|bool Matching string or false
2309          */
2310         public static function matchSpamRegex( $text ) {
2311                 global $wgSpamRegex;
2312                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2313                 $regexes = (array)$wgSpamRegex;
2314                 return self::matchSpamRegexInternal( $text, $regexes );
2315         }
2316
2317         /**
2318          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2319          *
2320          * @param string $text
2321          *
2322          * @return string|bool Matching string or false
2323          */
2324         public static function matchSummarySpamRegex( $text ) {
2325                 global $wgSummarySpamRegex;
2326                 $regexes = (array)$wgSummarySpamRegex;
2327                 return self::matchSpamRegexInternal( $text, $regexes );
2328         }
2329
2330         /**
2331          * @param string $text
2332          * @param array $regexes
2333          * @return bool|string
2334          */
2335         protected static function matchSpamRegexInternal( $text, $regexes ) {
2336                 foreach ( $regexes as $regex ) {
2337                         $matches = [];
2338                         if ( preg_match( $regex, $text, $matches ) ) {
2339                                 return $matches[0];
2340                         }
2341                 }
2342                 return false;
2343         }
2344
2345         function setHeaders() {
2346                 global $wgOut, $wgUser, $wgAjaxEditStash;
2347
2348                 $wgOut->addModules( 'mediawiki.action.edit' );
2349                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
2350
2351                 if ( $wgUser->getOption( 'showtoolbar' ) ) {
2352                         // The addition of default buttons is handled by getEditToolbar() which
2353                         // has its own dependency on this module. The call here ensures the module
2354                         // is loaded in time (it has position "top") for other modules to register
2355                         // buttons (e.g. extensions, gadgets, user scripts).
2356                         $wgOut->addModules( 'mediawiki.toolbar' );
2357                 }
2358
2359                 if ( $wgUser->getOption( 'uselivepreview' ) ) {
2360                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
2361                 }
2362
2363                 if ( $wgUser->getOption( 'useeditwarning' ) ) {
2364                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
2365                 }
2366
2367                 # Enabled article-related sidebar, toplinks, etc.
2368                 $wgOut->setArticleRelated( true );
2369
2370                 $contextTitle = $this->getContextTitle();
2371                 if ( $this->isConflict ) {
2372                         $msg = 'editconflict';
2373                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2374                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2375                 } else {
2376                         $msg = $contextTitle->exists()
2377                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2378                                         && $contextTitle->getDefaultMessageText() !== false
2379                                 )
2380                                 ? 'editing'
2381                                 : 'creating';
2382                 }
2383
2384                 # Use the title defined by DISPLAYTITLE magic word when present
2385                 # NOTE: getDisplayTitle() returns HTML while getPrefixedText() returns plain text.
2386                 #       setPageTitle() treats the input as wikitext, which should be safe in either case.
2387                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2388                 if ( $displayTitle === false ) {
2389                         $displayTitle = $contextTitle->getPrefixedText();
2390                 }
2391                 $wgOut->setPageTitle( $this->context->msg( $msg, $displayTitle ) );
2392                 # Transmit the name of the message to JavaScript for live preview
2393                 # Keep Resources.php/mediawiki.action.edit.preview in sync with the possible keys
2394                 $wgOut->addJsConfigVars( [
2395                         'wgEditMessage' => $msg,
2396                         'wgAjaxEditStash' => $wgAjaxEditStash,
2397                 ] );
2398         }
2399
2400         /**
2401          * Show all applicable editing introductions
2402          */
2403         protected function showIntro() {
2404                 global $wgOut, $wgUser;
2405                 if ( $this->suppressIntro ) {
2406                         return;
2407                 }
2408
2409                 $namespace = $this->mTitle->getNamespace();
2410
2411                 if ( $namespace == NS_MEDIAWIKI ) {
2412                         # Show a warning if editing an interface message
2413                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2414                         # If this is a default message (but not css or js),
2415                         # show a hint that it is translatable on translatewiki.net
2416                         if ( !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2417                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2418                         ) {
2419                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2420                                 if ( $defaultMessageText !== false ) {
2421                                         $wgOut->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2422                                                 'translateinterface' );
2423                                 }
2424                         }
2425                 } elseif ( $namespace == NS_FILE ) {
2426                         # Show a hint to shared repo
2427                         $file = wfFindFile( $this->mTitle );
2428                         if ( $file && !$file->isLocal() ) {
2429                                 $descUrl = $file->getDescriptionUrl();
2430                                 # there must be a description url to show a hint to shared repo
2431                                 if ( $descUrl ) {
2432                                         if ( !$this->mTitle->exists() ) {
2433                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", [
2434                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2435                                                 ] );
2436                                         } else {
2437                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", [
2438                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2439                                                 ] );
2440                                         }
2441                                 }
2442                         }
2443                 }
2444
2445                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2446                 # Show log extract when the user is currently blocked
2447                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2448                         $username = explode( '/', $this->mTitle->getText(), 2 )[0];
2449                         $user = User::newFromName( $username, false /* allow IP users*/ );
2450                         $ip = User::isIP( $username );
2451                         $block = Block::newFromTarget( $user, $user );
2452                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2453                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2454                                         [ 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ] );
2455                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
2456                                 # Show log extract if the user is currently blocked
2457                                 LogEventsList::showLogExtract(
2458                                         $wgOut,
2459                                         'block',
2460                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2461                                         '',
2462                                         [
2463                                                 'lim' => 1,
2464                                                 'showIfEmpty' => false,
2465                                                 'msgKey' => [
2466                                                         'blocked-notice-logextract',
2467                                                         $user->getName() # Support GENDER in notice
2468                                                 ]
2469                                         ]
2470                                 );
2471                         }
2472                 }
2473                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2474                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2475                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2476                                 $this->context->msg( 'helppage' )->inContentLanguage()->text()
2477                         ) );
2478                         if ( $wgUser->isLoggedIn() ) {
2479                                 $wgOut->wrapWikiMsg(
2480                                         // Suppress the external link icon, consider the help url an internal one
2481                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2482                                         [
2483                                                 'newarticletext',
2484                                                 $helpLink
2485                                         ]
2486                                 );
2487                         } else {
2488                                 $wgOut->wrapWikiMsg(
2489                                         // Suppress the external link icon, consider the help url an internal one
2490                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2491                                         [
2492                                                 'newarticletextanon',
2493                                                 $helpLink
2494                                         ]
2495                                 );
2496                         }
2497                 }
2498                 # Give a notice if the user is editing a deleted/moved page...
2499                 if ( !$this->mTitle->exists() ) {
2500                         LogEventsList::showLogExtract( $wgOut, [ 'delete', 'move' ], $this->mTitle,
2501                                 '',
2502                                 [
2503                                         'lim' => 10,
2504                                         'conds' => [ "log_action != 'revision'" ],
2505                                         'showIfEmpty' => false,
2506                                         'msgKey' => [ 'recreate-moveddeleted-warn' ]
2507                                 ]
2508                         );
2509                 }
2510         }
2511
2512         /**
2513          * Attempt to show a custom editing introduction, if supplied
2514          *
2515          * @return bool
2516          */
2517         protected function showCustomIntro() {
2518                 if ( $this->editintro ) {
2519                         $title = Title::newFromText( $this->editintro );
2520                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2521                                 global $wgOut;
2522                                 // Added using template syntax, to take <noinclude>'s into account.
2523                                 $wgOut->addWikiTextTitleTidy(
2524                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2525                                         $this->mTitle
2526                                 );
2527                                 return true;
2528                         }
2529                 }
2530                 return false;
2531         }
2532
2533         /**
2534          * Gets an editable textual representation of $content.
2535          * The textual representation can be turned by into a Content object by the
2536          * toEditContent() method.
2537          *
2538          * If $content is null or false or a string, $content is returned unchanged.
2539          *
2540          * If the given Content object is not of a type that can be edited using
2541          * the text base EditPage, an exception will be raised. Set
2542          * $this->allowNonTextContent to true to allow editing of non-textual
2543          * content.
2544          *
2545          * @param Content|null|bool|string $content
2546          * @return string The editable text form of the content.
2547          *
2548          * @throws MWException If $content is not an instance of TextContent and
2549          *   $this->allowNonTextContent is not true.
2550          */
2551         protected function toEditText( $content ) {
2552                 if ( $content === null || $content === false || is_string( $content ) ) {
2553                         return $content;
2554                 }
2555
2556                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2557                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2558                 }
2559
2560                 return $content->serialize( $this->contentFormat );
2561         }
2562
2563         /**
2564          * Turns the given text into a Content object by unserializing it.
2565          *
2566          * If the resulting Content object is not of a type that can be edited using
2567          * the text base EditPage, an exception will be raised. Set
2568          * $this->allowNonTextContent to true to allow editing of non-textual
2569          * content.
2570          *
2571          * @param string|null|bool $text Text to unserialize
2572          * @return Content|bool|null The content object created from $text. If $text was false
2573          *   or null, false resp. null will be  returned instead.
2574          *
2575          * @throws MWException If unserializing the text results in a Content
2576          *   object that is not an instance of TextContent and
2577          *   $this->allowNonTextContent is not true.
2578          */
2579         protected function toEditContent( $text ) {
2580                 if ( $text === false || $text === null ) {
2581                         return $text;
2582                 }
2583
2584                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2585                         $this->contentModel, $this->contentFormat );
2586
2587                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2588                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2589                 }
2590
2591                 return $content;
2592         }
2593
2594         /**
2595          * Send the edit form and related headers to $wgOut
2596          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2597          *     during form output near the top, for captchas and the like.
2598          *
2599          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2600          * use the EditPage::showEditForm:fields hook instead.
2601          */
2602         function showEditForm( $formCallback = null ) {
2603                 global $wgOut, $wgUser;
2604
2605                 # need to parse the preview early so that we know which templates are used,
2606                 # otherwise users with "show preview after edit box" will get a blank list
2607                 # we parse this near the beginning so that setHeaders can do the title
2608                 # setting work instead of leaving it in getPreviewText
2609                 $previewOutput = '';
2610                 if ( $this->formtype == 'preview' ) {
2611                         $previewOutput = $this->getPreviewText();
2612                 }
2613
2614                 Hooks::run( 'EditPage::showEditForm:initial', [ &$this, &$wgOut ] );
2615
2616                 $this->setHeaders();
2617
2618                 if ( $this->showHeader() === false ) {
2619                         return;
2620                 }
2621
2622                 $wgOut->addHTML( $this->editFormPageTop );
2623
2624                 if ( $wgUser->getOption( 'previewontop' ) ) {
2625                         $this->displayPreviewArea( $previewOutput, true );
2626                 }
2627
2628                 $wgOut->addHTML( $this->editFormTextTop );
2629
2630                 $showToolbar = true;
2631                 if ( $this->wasDeletedSinceLastEdit() ) {
2632                         if ( $this->formtype == 'save' ) {
2633                                 // Hide the toolbar and edit area, user can click preview to get it back
2634                                 // Add an confirmation checkbox and explanation.
2635                                 $showToolbar = false;
2636                         } else {
2637                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2638                                         'deletedwhileediting' );
2639                         }
2640                 }
2641
2642                 // @todo add EditForm plugin interface and use it here!
2643                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2644                 $wgOut->addHTML( Html::openElement(
2645                         'form',
2646                         [
2647                                 'id' => self::EDITFORM_ID,
2648                                 'name' => self::EDITFORM_ID,
2649                                 'method' => 'post',
2650                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2651                                 'enctype' => 'multipart/form-data'
2652                         ]
2653                 ) );
2654
2655                 if ( is_callable( $formCallback ) ) {
2656                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2657                         call_user_func_array( $formCallback, [ &$wgOut ] );
2658                 }
2659
2660                 // Add an empty field to trip up spambots
2661                 $wgOut->addHTML(
2662                         Xml::openElement( 'div', [ 'id' => 'antispam-container', 'style' => 'display: none;' ] )
2663                         . Html::rawElement(
2664                                 'label',
2665                                 [ 'for' => 'wpAntispam' ],
2666                                 $this->context->msg( 'simpleantispam-label' )->parse()
2667                         )
2668                         . Xml::element(
2669                                 'input',
2670                                 [
2671                                         'type' => 'text',
2672                                         'name' => 'wpAntispam',
2673                                         'id' => 'wpAntispam',
2674                                         'value' => ''
2675                                 ]
2676                         )
2677                         . Xml::closeElement( 'div' )
2678                 );
2679
2680                 Hooks::run( 'EditPage::showEditForm:fields', [ &$this, &$wgOut ] );
2681
2682                 // Put these up at the top to ensure they aren't lost on early form submission
2683                 $this->showFormBeforeText();
2684
2685                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2686                         $username = $this->lastDelete->user_name;
2687                         $comment = $this->lastDelete->log_comment;
2688
2689                         // It is better to not parse the comment at all than to have templates expanded in the middle
2690                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2691                         $key = $comment === ''
2692                                 ? 'confirmrecreate-noreason'
2693                                 : 'confirmrecreate';
2694                         $wgOut->addHTML(
2695                                 '<div class="mw-confirm-recreate">' .
2696                                         $this->context->msg( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2697                                 Xml::checkLabel( $this->context->msg( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2698                                         [ 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' ]
2699                                 ) .
2700                                 '</div>'
2701                         );
2702                 }
2703
2704                 # When the summary is hidden, also hide them on preview/show changes
2705                 if ( $this->nosummary ) {
2706                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2707                 }
2708
2709                 # If a blank edit summary was previously provided, and the appropriate
2710                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2711                 # user being bounced back more than once in the event that a summary
2712                 # is not required.
2713                 # ####
2714                 # For a bit more sophisticated detection of blank summaries, hash the
2715                 # automatic one and pass that in the hidden field wpAutoSummary.
2716                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2717                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2718                 }
2719
2720                 if ( $this->undidRev ) {
2721                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2722                 }
2723
2724                 if ( $this->selfRedirect ) {
2725                         $wgOut->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2726                 }
2727
2728                 if ( $this->hasPresetSummary ) {
2729                         // If a summary has been preset using &summary= we don't want to prompt for
2730                         // a different summary. Only prompt for a summary if the summary is blanked.
2731                         // (Bug 17416)
2732                         $this->autoSumm = md5( '' );
2733                 }
2734
2735                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2736                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2737
2738                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2739                 $wgOut->addHTML( Html::hidden( 'parentRevId', $this->getParentRevId() ) );
2740
2741                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2742                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2743
2744                 if ( $this->section == 'new' ) {
2745                         $this->showSummaryInput( true, $this->summary );
2746                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2747                 }
2748
2749                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2750
2751                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2752                         $wgOut->addHTML( EditPage::getEditToolbar( $this->mTitle ) );
2753                 }
2754
2755                 if ( $this->blankArticle ) {
2756                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2757                 }
2758
2759                 if ( $this->isConflict ) {
2760                         // In an edit conflict bypass the overridable content form method
2761                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2762                         // resolved between page source edits and custom ui edits using the
2763                         // custom edit ui.
2764                         $this->textbox2 = $this->textbox1;
2765
2766                         $content = $this->getCurrentContent();
2767                         $this->textbox1 = $this->toEditText( $content );
2768
2769                         $this->showTextbox1();
2770                 } else {
2771                         $this->showContentForm();
2772                 }
2773
2774                 $wgOut->addHTML( $this->editFormTextAfterContent );
2775
2776                 $this->showStandardInputs();
2777
2778                 $this->showFormAfterText();
2779
2780                 $this->showTosSummary();
2781
2782                 $this->showEditTools();
2783
2784                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2785
2786                 $wgOut->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
2787
2788                 $wgOut->addHTML( Html::rawElement( 'div', [ 'class' => 'hiddencats' ],
2789                         Linker::formatHiddenCategories( $this->page->getHiddenCategories() ) ) );
2790
2791                 $wgOut->addHTML( Html::rawElement( 'div', [ 'class' => 'limitreport' ],
2792                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2793
2794                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2795
2796                 if ( $this->isConflict ) {
2797                         try {
2798                                 $this->showConflict();
2799                         } catch ( MWContentSerializationException $ex ) {
2800                                 // this can't really happen, but be nice if it does.
2801                                 $msg = $this->context->msg(
2802                                         'content-failed-to-parse',
2803                                         $this->contentModel,
2804                                         $this->contentFormat,
2805                                         $ex->getMessage()
2806                                 );
2807                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2808                         }
2809                 }
2810
2811                 // Set a hidden field so JS knows what edit form mode we are in
2812                 if ( $this->isConflict ) {
2813                         $mode = 'conflict';
2814                 } elseif ( $this->preview ) {
2815                         $mode = 'preview';
2816                 } elseif ( $this->diff ) {
2817                         $mode = 'diff';
2818                 } else {
2819                         $mode = 'text';
2820                 }
2821                 $wgOut->addHTML( Html::hidden( 'mode', $mode, [ 'id' => 'mw-edit-mode' ] ) );
2822
2823                 // Marker for detecting truncated form data.  This must be the last
2824                 // parameter sent in order to be of use, so do not move me.
2825                 $wgOut->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2826                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2827
2828                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2829                         $this->displayPreviewArea( $previewOutput, false );
2830                 }
2831
2832         }
2833
2834         /**
2835          * Wrapper around TemplatesOnThisPageFormatter to make
2836          * a "templates on this page" list.
2837          *
2838          * @param Title[] $templates
2839          * @return string HTML
2840          */
2841         protected function makeTemplatesOnThisPageList( array $templates ) {
2842                 $templateListFormatter = new TemplatesOnThisPageFormatter(
2843                         $this->context, MediaWikiServices::getInstance()->getLinkRenderer()
2844                 );
2845
2846                 // preview if preview, else section if section, else false
2847                 $type = false;
2848                 if ( $this->preview ) {
2849                         $type = 'preview';
2850                 } elseif ( $this->section != '' ) {
2851                         $type = 'section';
2852                 }
2853
2854                 return Html::rawElement( 'div', [ 'class' => 'templatesUsed' ],
2855                         $templateListFormatter->format( $templates, $type )
2856                 );
2857
2858         }
2859
2860         /**
2861          * Extract the section title from current section text, if any.
2862          *
2863          * @param string $text
2864          * @return string|bool String or false
2865          */
2866         public static function extractSectionTitle( $text ) {
2867                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2868                 if ( !empty( $matches[2] ) ) {
2869                         global $wgParser;
2870                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2871                 } else {
2872                         return false;
2873                 }
2874         }
2875
2876         /**
2877          * @return bool
2878          */
2879         protected function showHeader() {
2880                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2881                 global $wgAllowUserCss, $wgAllowUserJs;
2882
2883                 if ( $this->mTitle->isTalkPage() ) {
2884                         $wgOut->addWikiMsg( 'talkpagetext' );
2885                 }
2886
2887                 // Add edit notices
2888                 $editNotices = $this->mTitle->getEditNotices( $this->oldid );
2889                 if ( count( $editNotices ) ) {
2890                         $wgOut->addHTML( implode( "\n", $editNotices ) );
2891                 } else {
2892                         $msg = $this->context->msg( 'editnotice-notext' );
2893                         if ( !$msg->isDisabled() ) {
2894                                 $wgOut->addHTML(
2895                                         '<div class="mw-editnotice-notext">'
2896                                         . $msg->parseAsBlock()
2897                                         . '</div>'
2898                                 );
2899                         }
2900                 }
2901
2902                 if ( $this->isConflict ) {
2903                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2904                         $this->editRevId = $this->page->getLatest();
2905                 } else {
2906                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2907                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2908                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2909                                 // Someone is welcome to try refactoring though
2910                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2911                                 return false;
2912                         }
2913
2914                         if ( $this->section != '' && $this->section != 'new' ) {
2915                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2916                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); // FIXME: use Content object
2917                                         if ( $sectionTitle !== false ) {
2918                                                 $this->summary = "/* $sectionTitle */ ";
2919                                         }
2920                                 }
2921                         }
2922
2923                         if ( $this->missingComment ) {
2924                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2925                         }
2926
2927                         if ( $this->missingSummary && $this->section != 'new' ) {
2928                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2929                         }
2930
2931                         if ( $this->missingSummary && $this->section == 'new' ) {
2932                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2933                         }
2934
2935                         if ( $this->blankArticle ) {
2936                                 $wgOut->wrapWikiMsg( "<div id='mw-blankarticle'>\n$1\n</div>", 'blankarticle' );
2937                         }
2938
2939                         if ( $this->selfRedirect ) {
2940                                 $wgOut->wrapWikiMsg( "<div id='mw-selfredirect'>\n$1\n</div>", 'selfredirect' );
2941                         }
2942
2943                         if ( $this->hookError !== '' ) {
2944                                 $wgOut->addWikiText( $this->hookError );
2945                         }
2946
2947                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2948                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2949                         }
2950
2951                         if ( $this->section != 'new' ) {
2952                                 $revision = $this->mArticle->getRevisionFetched();
2953                                 if ( $revision ) {
2954                                         // Let sysop know that this will make private content public if saved
2955
2956                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2957                                                 $wgOut->wrapWikiMsg(
2958                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2959                                                         'rev-deleted-text-permission'
2960                                                 );
2961                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2962                                                 $wgOut->wrapWikiMsg(
2963                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2964                                                         'rev-deleted-text-view'
2965                                                 );
2966                                         }
2967
2968                                         if ( !$revision->isCurrent() ) {
2969                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2970                                                 $wgOut->addWikiMsg( 'editingold' );
2971                                         }
2972                                 } elseif ( $this->mTitle->exists() ) {
2973                                         // Something went wrong
2974
2975                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2976                                                 [ 'missing-revision', $this->oldid ] );
2977                                 }
2978                         }
2979                 }
2980
2981                 if ( wfReadOnly() ) {
2982                         $wgOut->wrapWikiMsg(
2983                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
2984                                 [ 'readonlywarning', wfReadOnlyReason() ]
2985                         );
2986                 } elseif ( $wgUser->isAnon() ) {
2987                         if ( $this->formtype != 'preview' ) {
2988                                 $wgOut->wrapWikiMsg(
2989                                         "<div id='mw-anon-edit-warning' class='warningbox'>\n$1\n</div>",
2990                                         [ 'anoneditwarning',
2991                                                 // Log-in link
2992                                                 SpecialPage::getTitleFor( 'Userlogin' )->getFullURL( [
2993                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
2994                                                 ] ),
2995                                                 // Sign-up link
2996                                                 SpecialPage::getTitleFor( 'CreateAccount' )->getFullURL( [
2997                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
2998                                                 ] )
2999                                         ]
3000                                 );
3001                         } else {
3002                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\" class=\"warningbox\">\n$1</div>",
3003                                         'anonpreviewwarning'
3004                                 );
3005                         }
3006                 } else {
3007                         if ( $this->isCssJsSubpage ) {
3008                                 # Check the skin exists
3009                                 if ( $this->isWrongCaseCssJsPage ) {
3010                                         $wgOut->wrapWikiMsg(
3011                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
3012                                                 [ 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ]
3013                                         );
3014                                 }
3015                                 if ( $this->getTitle()->isSubpageOf( $wgUser->getUserPage() ) ) {
3016                                         $wgOut->wrapWikiMsg( '<div class="mw-usercssjspublic">$1</div>',
3017                                                 $this->isCssSubpage ? 'usercssispublic' : 'userjsispublic'
3018                                         );
3019                                         if ( $this->formtype !== 'preview' ) {
3020                                                 if ( $this->isCssSubpage && $wgAllowUserCss ) {
3021                                                         $wgOut->wrapWikiMsg(
3022                                                                 "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
3023                                                                 [ 'usercssyoucanpreview' ]
3024                                                         );
3025                                                 }
3026
3027                                                 if ( $this->isJsSubpage && $wgAllowUserJs ) {
3028                                                         $wgOut->wrapWikiMsg(
3029                                                                 "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
3030                                                                 [ 'userjsyoucanpreview' ]
3031                                                         );
3032                                                 }
3033                                         }
3034                                 }
3035                         }
3036                 }
3037
3038                 if ( $this->mTitle->isProtected( 'edit' ) &&
3039                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
3040                 ) {
3041                         # Is the title semi-protected?
3042                         if ( $this->mTitle->isSemiProtected() ) {
3043                                 $noticeMsg = 'semiprotectedpagewarning';
3044                         } else {
3045                                 # Then it must be protected based on static groups (regular)
3046                                 $noticeMsg = 'protectedpagewarning';
3047                         }
3048                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
3049                                 [ 'lim' => 1, 'msgKey' => [ $noticeMsg ] ] );
3050                 }
3051                 if ( $this->mTitle->isCascadeProtected() ) {
3052                         # Is this page under cascading protection from some source pages?
3053                         /** @var Title[] $cascadeSources */
3054                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
3055                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
3056                         $cascadeSourcesCount = count( $cascadeSources );
3057                         if ( $cascadeSourcesCount > 0 ) {
3058                                 # Explain, and list the titles responsible
3059                                 foreach ( $cascadeSources as $page ) {
3060                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
3061                                 }
3062                         }
3063                         $notice .= '</div>';
3064                         $wgOut->wrapWikiMsg( $notice, [ 'cascadeprotectedwarning', $cascadeSourcesCount ] );
3065                 }
3066                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
3067                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
3068                                 [ 'lim' => 1,
3069                                         'showIfEmpty' => false,
3070                                         'msgKey' => [ 'titleprotectedwarning' ],
3071                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ] );
3072                 }
3073
3074                 if ( $this->contentLength === false ) {
3075                         $this->contentLength = strlen( $this->textbox1 );
3076                 }
3077
3078                 if ( $this->tooBig || $this->contentLength > $wgMaxArticleSize * 1024 ) {
3079                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
3080                                 [
3081                                         'longpageerror',
3082                                         $wgLang->formatNum( round( $this->contentLength / 1024, 3 ) ),
3083                                         $wgLang->formatNum( $wgMaxArticleSize )
3084                                 ]
3085                         );
3086                 } else {
3087                         if ( !$this->context->msg( 'longpage-hint' )->isDisabled() ) {
3088                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
3089                                         [
3090                                                 'longpage-hint',
3091                                                 $wgLang->formatSize( strlen( $this->textbox1 ) ),
3092                                                 strlen( $this->textbox1 )
3093                                         ]
3094                                 );
3095                         }
3096                 }
3097                 # Add header copyright warning
3098                 $this->showHeaderCopyrightWarning();
3099
3100                 return true;
3101         }
3102
3103         /**
3104          * Standard summary input and label (wgSummary), abstracted so EditPage
3105          * subclasses may reorganize the form.
3106          * Note that you do not need to worry about the label's for=, it will be
3107          * inferred by the id given to the input. You can remove them both by
3108          * passing [ 'id' => false ] to $userInputAttrs.
3109          *
3110          * @param string $summary The value of the summary input
3111          * @param string $labelText The html to place inside the label
3112          * @param array $inputAttrs Array of attrs to use on the input
3113          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
3114          *
3115          * @return array An array in the format [ $label, $input ]
3116          */
3117         function getSummaryInput( $summary = "", $labelText = null,
3118                 $inputAttrs = null, $spanLabelAttrs = null
3119         ) {
3120                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
3121                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : [] ) + [
3122                         'id' => 'wpSummary',
3123                         'maxlength' => '200',
3124                         'tabindex' => '1',
3125                         'size' => 60,
3126                         'spellcheck' => 'true',
3127                 ] + Linker::tooltipAndAccesskeyAttribs( 'summary' );
3128
3129                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : [] ) + [
3130                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
3131                         'id' => "wpSummaryLabel"
3132                 ];
3133
3134                 $label = null;
3135                 if ( $labelText ) {
3136                         $label = Xml::tags(
3137                                 'label',
3138                                 $inputAttrs['id'] ? [ 'for' => $inputAttrs['id'] ] : null,
3139                                 $labelText
3140                         );
3141                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
3142                 }
3143
3144                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
3145
3146                 return [ $label, $input ];
3147         }
3148
3149         /**
3150          * @param bool $isSubjectPreview True if this is the section subject/title
3151          *   up top, or false if this is the comment summary
3152          *   down below the textarea
3153          * @param string $summary The text of the summary to display
3154          */
3155         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
3156                 global $wgOut;
3157                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
3158                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
3159                 if ( $isSubjectPreview ) {
3160                         if ( $this->nosummary ) {
3161                                 return;
3162                         }
3163                 } else {
3164                         if ( !$this->mShowSummaryField ) {
3165                                 return;
3166                         }
3167                 }
3168                 $labelText = $this->context->msg( $isSubjectPreview ? 'subject' : 'summary' )->parse();
3169                 list( $label, $input ) = $this->getSummaryInput(
3170                         $summary,
3171                         $labelText,
3172                         [ 'class' => $summaryClass ],
3173                         []
3174                 );
3175                 $wgOut->addHTML( "{$label} {$input}" );
3176         }
3177
3178         /**
3179          * @param bool $isSubjectPreview True if this is the section subject/title
3180          *   up top, or false if this is the comment summary
3181          *   down below the textarea
3182          * @param string $summary The text of the summary to display
3183          * @return string
3184          */
3185         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
3186                 // avoid spaces in preview, gets always trimmed on save
3187                 $summary = trim( $summary );
3188                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
3189                         return "";
3190                 }
3191
3192                 global $wgParser;
3193
3194                 if ( $isSubjectPreview ) {
3195                         $summary = $this->context->msg( 'newsectionsummary' )
3196                                 ->rawParams( $wgParser->stripSectionName( $summary ) )
3197                                 ->inContentLanguage()->text();
3198                 }
3199
3200                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
3201
3202                 $summary = $this->context->msg( $message )->parse()
3203                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
3204                 return Xml::tags( 'div', [ 'class' => 'mw-summary-preview' ], $summary );
3205         }
3206
3207         protected function showFormBeforeText() {
3208                 global $wgOut;
3209                 $section = htmlspecialchars( $this->section );
3210                 $wgOut->addHTML( <<<HTML
3211 <input type='hidden' value="{$section}" name="wpSection"/>
3212 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
3213 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
3214 <input type='hidden' value="{$this->editRevId}" name="editRevId" />
3215 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
3216
3217 HTML
3218                 );
3219                 if ( !$this->checkUnicodeCompliantBrowser() ) {
3220                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
3221                 }
3222         }
3223
3224         protected function showFormAfterText() {
3225                 global $wgOut, $wgUser;
3226                 /**
3227                  * To make it harder for someone to slip a user a page
3228                  * which submits an edit form to the wiki without their
3229                  * knowledge, a random token is associated with the login
3230                  * session. If it's not passed back with the submission,
3231                  * we won't save the page, or render user JavaScript and
3232                  * CSS previews.
3233                  *
3234                  * For anon editors, who may not have a session, we just
3235                  * include the constant suffix to prevent editing from
3236                  * broken text-mangling proxies.
3237                  */
3238                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
3239         }
3240
3241         /**
3242          * Subpage overridable method for printing the form for page content editing
3243          * By default this simply outputs wpTextbox1
3244          * Subclasses can override this to provide a custom UI for editing;
3245          * be it a form, or simply wpTextbox1 with a modified content that will be
3246          * reverse modified when extracted from the post data.
3247          * Note that this is basically the inverse for importContentFormData
3248          */
3249         protected function showContentForm() {
3250                 $this->showTextbox1();
3251         }
3252
3253         /**
3254          * Method to output wpTextbox1
3255          * The $textoverride method can be used by subclasses overriding showContentForm
3256          * to pass back to this method.
3257          *
3258          * @param array $customAttribs Array of html attributes to use in the textarea
3259          * @param string $textoverride Optional text to override $this->textarea1 with
3260          */
3261         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
3262                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
3263                         $attribs = [ 'style' => 'display:none;' ];
3264                 } else {
3265                         $classes = []; // Textarea CSS
3266                         if ( $this->mTitle->isProtected( 'edit' ) &&
3267                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
3268                         ) {
3269                                 # Is the title semi-protected?
3270                                 if ( $this->mTitle->isSemiProtected() ) {
3271                                         $classes[] = 'mw-textarea-sprotected';
3272                                 } else {
3273                                         # Then it must be protected based on static groups (regular)
3274                                         $classes[] = 'mw-textarea-protected';
3275                                 }
3276                                 # Is the title cascade-protected?
3277                                 if ( $this->mTitle->isCascadeProtected() ) {
3278                                         $classes[] = 'mw-textarea-cprotected';
3279                                 }
3280                         }
3281
3282                         $attribs = [ 'tabindex' => 1 ];
3283
3284                         if ( is_array( $customAttribs ) ) {
3285                                 $attribs += $customAttribs;
3286                         }
3287
3288                         if ( count( $classes ) ) {
3289                                 if ( isset( $attribs['class'] ) ) {
3290                                         $classes[] = $attribs['class'];
3291                                 }
3292                                 $attribs['class'] = implode( ' ', $classes );
3293                         }
3294                 }
3295
3296                 $this->showTextbox(
3297                         $textoverride !== null ? $textoverride : $this->textbox1,
3298                         'wpTextbox1',
3299                         $attribs
3300                 );
3301         }
3302
3303         protected function showTextbox2() {
3304                 $this->showTextbox( $this->textbox2, 'wpTextbox2', [ 'tabindex' => 6, 'readonly' ] );
3305         }
3306
3307         protected function showTextbox( $text, $name, $customAttribs = [] ) {
3308                 global $wgOut, $wgUser;
3309
3310                 $wikitext = $this->safeUnicodeOutput( $text );
3311                 if ( strval( $wikitext ) !== '' ) {
3312                         // Ensure there's a newline at the end, otherwise adding lines
3313                         // is awkward.
3314                         // But don't add a newline if the ext is empty, or Firefox in XHTML
3315                         // mode will show an extra newline. A bit annoying.
3316                         $wikitext .= "\n";
3317                 }
3318
3319                 $attribs = $customAttribs + [
3320                         'accesskey' => ',',
3321                         'id' => $name,
3322                         'cols' => $wgUser->getIntOption( 'cols' ),
3323                         'rows' => $wgUser->getIntOption( 'rows' ),
3324                         // Avoid PHP notices when appending preferences
3325                         // (appending allows customAttribs['style'] to still work).
3326                         'style' => ''
3327                 ];
3328
3329                 // The following classes can be used here:
3330                 // * mw-editfont-default
3331                 // * mw-editfont-monospace
3332                 // * mw-editfont-sans-serif
3333                 // * mw-editfont-serif
3334                 $class = 'mw-editfont-' . $wgUser->getOption( 'editfont' );
3335
3336                 if ( isset( $attribs['class'] ) ) {
3337                         if ( is_string( $attribs['class'] ) ) {
3338                                 $attribs['class'] .= ' ' . $class;
3339                         } elseif ( is_array( $attribs['class'] ) ) {
3340                                 $attribs['class'][] = $class;
3341                         }
3342                 } else {
3343                         $attribs['class'] = $class;
3344                 }
3345
3346                 $pageLang = $this->mTitle->getPageLanguage();
3347                 $attribs['lang'] = $pageLang->getHtmlCode();
3348                 $attribs['dir'] = $pageLang->getDir();
3349
3350                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
3351         }
3352
3353         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
3354                 global $wgOut;
3355                 $classes = [];
3356                 if ( $isOnTop ) {
3357                         $classes[] = 'ontop';
3358                 }
3359
3360                 $attribs = [ 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) ];
3361
3362                 if ( $this->formtype != 'preview' ) {
3363                         $attribs['style'] = 'display: none;';
3364                 }
3365
3366                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
3367
3368                 if ( $this->formtype == 'preview' ) {
3369                         $this->showPreview( $previewOutput );
3370                 } else {
3371                         // Empty content container for LivePreview
3372                         $pageViewLang = $this->mTitle->getPageViewLanguage();
3373                         $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3374                                 'class' => 'mw-content-' . $pageViewLang->getDir() ];
3375                         $wgOut->addHTML( Html::rawElement( 'div', $attribs ) );
3376                 }
3377
3378                 $wgOut->addHTML( '</div>' );
3379
3380                 if ( $this->formtype == 'diff' ) {
3381                         try {
3382                                 $this->showDiff();
3383                         } catch ( MWContentSerializationException $ex ) {
3384                                 $msg = $this->context->msg(
3385                                         'content-failed-to-parse',
3386                                         $this->contentModel,
3387                                         $this->contentFormat,
3388                                         $ex->getMessage()
3389                                 );
3390                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3391                         }
3392                 }
3393         }
3394
3395         /**
3396          * Append preview output to $wgOut.
3397          * Includes category rendering if this is a category page.
3398          *
3399          * @param string $text The HTML to be output for the preview.
3400          */
3401         protected function showPreview( $text ) {
3402                 global $wgOut;
3403                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3404                         $this->mArticle->openShowCategory();
3405                 }
3406                 # This hook seems slightly odd here, but makes things more
3407                 # consistent for extensions.
3408                 Hooks::run( 'OutputPageBeforeHTML', [ &$wgOut, &$text ] );
3409                 $wgOut->addHTML( $text );
3410                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3411                         $this->mArticle->closeShowCategory();
3412                 }
3413         }
3414
3415         /**
3416          * Get a diff between the current contents of the edit box and the
3417          * version of the page we're editing from.
3418          *
3419          * If this is a section edit, we'll replace the section as for final
3420          * save and then make a comparison.
3421          */
3422         function showDiff() {
3423                 global $wgUser, $wgContLang, $wgOut;
3424
3425                 $oldtitlemsg = 'currentrev';
3426                 # if message does not exist, show diff against the preloaded default
3427                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3428                         $oldtext = $this->mTitle->getDefaultMessageText();
3429                         if ( $oldtext !== false ) {
3430                                 $oldtitlemsg = 'defaultmessagetext';
3431                                 $oldContent = $this->toEditContent( $oldtext );
3432                         } else {
3433                                 $oldContent = null;
3434                         }
3435                 } else {
3436                         $oldContent = $this->getCurrentContent();
3437                 }
3438
3439                 $textboxContent = $this->toEditContent( $this->textbox1 );
3440                 if ( $this->editRevId !== null ) {
3441                         $newContent = $this->page->replaceSectionAtRev(
3442                                 $this->section, $textboxContent, $this->summary, $this->editRevId
3443                         );
3444                 } else {
3445                         $newContent = $this->page->replaceSectionContent(
3446                                 $this->section, $textboxContent, $this->summary, $this->edittime
3447                         );
3448                 }
3449
3450                 if ( $newContent ) {
3451                         ContentHandler::runLegacyHooks( 'EditPageGetDiffText', [ $this, &$newContent ], '1.21' );
3452                         Hooks::run( 'EditPageGetDiffContent', [ $this, &$newContent ] );
3453
3454                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
3455                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
3456                 }
3457
3458                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3459                         $oldtitle = $this->context->msg( $oldtitlemsg )->parse();
3460                         $newtitle = $this->context->msg( 'yourtext' )->parse();
3461
3462                         if ( !$oldContent ) {
3463                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3464                         }
3465
3466                         if ( !$newContent ) {
3467                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3468                         }
3469
3470                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
3471                         $de->setContent( $oldContent, $newContent );
3472
3473                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3474                         $de->showDiffStyle();
3475                 } else {
3476                         $difftext = '';
3477                 }
3478
3479                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3480         }
3481
3482         /**
3483          * Show the header copyright warning.
3484          */
3485         protected function showHeaderCopyrightWarning() {
3486                 $msg = 'editpage-head-copy-warn';
3487                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3488                         global $wgOut;
3489                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3490                                 'editpage-head-copy-warn' );
3491                 }
3492         }
3493
3494         /**
3495          * Give a chance for site and per-namespace customizations of
3496          * terms of service summary link that might exist separately
3497          * from the copyright notice.
3498          *
3499          * This will display between the save button and the edit tools,
3500          * so should remain short!
3501          */
3502         protected function showTosSummary() {
3503                 $msg = 'editpage-tos-summary';
3504                 Hooks::run( 'EditPageTosSummary', [ $this->mTitle, &$msg ] );
3505                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3506                         global $wgOut;
3507                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
3508                         $wgOut->addWikiMsg( $msg );
3509                         $wgOut->addHTML( '</div>' );
3510                 }
3511         }
3512
3513         protected function showEditTools() {
3514                 global $wgOut;
3515                 $wgOut->addHTML( '<div class="mw-editTools">' .
3516                         $this->context->msg( 'edittools' )->inContentLanguage()->parse() .
3517                         '</div>' );
3518         }
3519
3520         /**
3521          * Get the copyright warning
3522          *
3523          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3524          * @return string
3525          */
3526         protected function getCopywarn() {
3527                 return self::getCopyrightWarning( $this->mTitle );
3528         }
3529
3530         /**
3531          * Get the copyright warning, by default returns wikitext
3532          *
3533          * @param Title $title
3534          * @param string $format Output format, valid values are any function of a Message object
3535          * @return string
3536          */
3537         public static function getCopyrightWarning( $title, $format = 'plain', $langcode = null ) {
3538                 global $wgRightsText;
3539                 if ( $wgRightsText ) {
3540                         $copywarnMsg = [ 'copyrightwarning',
3541                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3542                                 $wgRightsText ];
3543                 } else {
3544                         $copywarnMsg = [ 'copyrightwarning2',
3545                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' ];
3546                 }
3547                 // Allow for site and per-namespace customization of contribution/copyright notice.
3548                 Hooks::run( 'EditPageCopyrightWarning', [ $title, &$copywarnMsg ] );
3549
3550                 $msg = call_user_func_array( 'wfMessage', $copywarnMsg )->title( $title );
3551                 if ( $langcode ) {
3552                         $msg->inLanguage( $langcode );
3553                 }
3554                 return "<div id=\"editpage-copywarn\">\n" .
3555                         $msg->$format() . "\n</div>";
3556         }
3557
3558         /**
3559          * Get the Limit report for page previews
3560          *
3561          * @since 1.22
3562          * @param ParserOutput $output ParserOutput object from the parse
3563          * @return string HTML
3564          */
3565         public static function getPreviewLimitReport( $output ) {
3566                 if ( !$output || !$output->getLimitReportData() ) {
3567                         return '';
3568                 }
3569
3570                 $limitReport = Html::rawElement( 'div', [ 'class' => 'mw-limitReportExplanation' ],
3571                         wfMessage( 'limitreport-title' )->parseAsBlock()
3572                 );
3573
3574                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3575                 $limitReport .= Html::openElement( 'div', [ 'class' => 'preview-limit-report-wrapper' ] );
3576
3577                 $limitReport .= Html::openElement( 'table', [
3578                         'class' => 'preview-limit-report wikitable'
3579                 ] ) .
3580                         Html::openElement( 'tbody' );
3581
3582                 foreach ( $output->getLimitReportData()['limitreport'] as $key => $value ) {
3583                         if ( Hooks::run( 'ParserLimitReportFormat',
3584                                 [ $key, &$value, &$limitReport, true, true ]
3585                         ) ) {
3586                                 $keyMsg = wfMessage( "limitreport-$key" );
3587                                 $valueMsg = wfMessage(
3588                                         [ "limitreport-$key-value-html", "limitreport-$key-value" ]
3589                                 );
3590                                 if ( !$valueMsg->exists() ) {
3591                                         $valueMsg = new RawMessage( '$1' );
3592                                 }
3593                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3594                                         // If it's a value/limit array, convert it for $1/$2
3595                                         if ( is_array( $value ) && isset( $value['value'] ) ) {
3596                                                 $value = [ $value['value'], $value['limit'] ];
3597                                         }
3598                                         $limitReport .= Html::openElement( 'tr' ) .
3599                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3600                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
3601                                                 Html::closeElement( 'tr' );
3602                                 }
3603                         }
3604                 }
3605
3606                 $limitReport .= Html::closeElement( 'tbody' ) .
3607                         Html::closeElement( 'table' ) .
3608                         Html::closeElement( 'div' );
3609
3610                 return $limitReport;
3611         }
3612
3613         protected function showStandardInputs( &$tabindex = 2 ) {
3614                 global $wgOut;
3615                 $wgOut->addHTML( "<div class='editOptions'>\n" );
3616
3617                 if ( $this->section != 'new' ) {
3618                         $this->showSummaryInput( false, $this->summary );
3619                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3620                 }
3621
3622                 $checkboxes = $this->getCheckboxes( $tabindex,
3623                         [ 'minor' => $this->minoredit, 'watch' => $this->watchthis ] );
3624                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
3625
3626                 // Show copyright warning.
3627                 $wgOut->addWikiText( $this->getCopywarn() );
3628                 $wgOut->addHTML( $this->editFormTextAfterWarn );
3629
3630                 $wgOut->addHTML( "<div class='editButtons'>\n" );
3631                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3632
3633                 $cancel = $this->getCancelLink();
3634                 if ( $cancel !== '' ) {
3635                         $cancel .= Html::element( 'span',
3636                                 [ 'class' => 'mw-editButtons-pipe-separator' ],
3637                                 $this->context->msg( 'pipe-separator' )->text() );
3638                 }
3639
3640                 $message = $this->context->msg( 'edithelppage' )->inContentLanguage()->text();
3641                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3642                 $attrs = [
3643                         'target' => 'helpwindow',
3644                         'href' => $edithelpurl,
3645                 ];
3646                 $edithelp = Html::linkButton( $this->context->msg( 'edithelp' )->text(),
3647                         $attrs, [ 'mw-ui-quiet' ] ) .
3648                         $this->context->msg( 'word-separator' )->escaped() .
3649                         $this->context->msg( 'newwindow' )->parse();
3650
3651                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
3652                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
3653                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
3654
3655                 Hooks::run( 'EditPage::showStandardInputs:options', [ $this, $wgOut, &$tabindex ] );
3656
3657                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
3658         }
3659
3660         /**
3661          * Show an edit conflict. textbox1 is already shown in showEditForm().
3662          * If you want to use another entry point to this function, be careful.
3663          */
3664         protected function showConflict() {
3665                 global $wgOut;
3666
3667                 if ( Hooks::run( 'EditPageBeforeConflictDiff', [ &$this, &$wgOut ] ) ) {
3668                         $stats = $wgOut->getContext()->getStats();
3669                         $stats->increment( 'edit.failures.conflict' );
3670                         // Only include 'standard' namespaces to avoid creating unknown numbers of statsd metrics
3671                         if (
3672                                 $this->mTitle->getNamespace() >= NS_MAIN &&
3673                                 $this->mTitle->getNamespace() <= NS_CATEGORY_TALK
3674                         ) {
3675                                 $stats->increment( 'edit.failures.conflict.byNamespaceId.' . $this->mTitle->getNamespace() );
3676                         }
3677
3678                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3679
3680                         $content1 = $this->toEditContent( $this->textbox1 );
3681                         $content2 = $this->toEditContent( $this->textbox2 );
3682
3683                         $handler = ContentHandler::getForModelID( $this->contentModel );
3684                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3685                         $de->setContent( $content2, $content1 );
3686                         $de->showDiff(
3687                                 $this->context->msg( 'yourtext' )->parse(),
3688                                 $this->context->msg( 'storedversion' )->text()
3689                         );
3690
3691                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3692                         $this->showTextbox2();
3693                 }
3694         }
3695
3696         /**
3697          * @return string
3698          */
3699         public function getCancelLink() {
3700                 $cancelParams = [];
3701                 if ( !$this->isConflict && $this->oldid > 0 ) {
3702                         $cancelParams['oldid'] = $this->oldid;
3703                 } elseif ( $this->getContextTitle()->isRedirect() ) {
3704                         $cancelParams['redirect'] = 'no';
3705                 }
3706                 $attrs = [ 'id' => 'mw-editform-cancel' ];
3707
3708                 return Linker::linkKnown(
3709                         $this->getContextTitle(),
3710                         $this->context->msg( 'cancel' )->parse(),
3711                         Html::buttonAttributes( $attrs, [ 'mw-ui-quiet' ] ),
3712                         $cancelParams
3713                 );
3714         }
3715
3716         /**
3717          * Returns the URL to use in the form's action attribute.
3718          * This is used by EditPage subclasses when simply customizing the action
3719          * variable in the constructor is not enough. This can be used when the
3720          * EditPage lives inside of a Special page rather than a custom page action.
3721          *
3722          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3723          * @return string
3724          */
3725         protected function getActionURL( Title $title ) {
3726                 return $title->getLocalURL( [ 'action' => $this->action ] );
3727         }
3728
3729         /**
3730          * Check if a page was deleted while the user was editing it, before submit.
3731          * Note that we rely on the logging table, which hasn't been always there,
3732          * but that doesn't matter, because this only applies to brand new
3733          * deletes.
3734          * @return bool
3735          */
3736         protected function wasDeletedSinceLastEdit() {
3737                 if ( $this->deletedSinceEdit !== null ) {
3738                         return $this->deletedSinceEdit;
3739                 }
3740
3741                 $this->deletedSinceEdit = false;
3742
3743                 if ( !$this->mTitle->exists() && $this->mTitle->isDeletedQuick() ) {
3744                         $this->lastDelete = $this->getLastDelete();
3745                         if ( $this->lastDelete ) {
3746                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3747                                 if ( $deleteTime > $this->starttime ) {
3748                                         $this->deletedSinceEdit = true;
3749                                 }
3750                         }
3751                 }
3752
3753                 return $this->deletedSinceEdit;
3754         }
3755
3756         /**
3757          * @return bool|stdClass
3758          */
3759         protected function getLastDelete() {
3760                 $dbr = wfGetDB( DB_REPLICA );
3761                 $data = $dbr->selectRow(
3762                         [ 'logging', 'user' ],
3763                         [
3764                                 'log_type',
3765                                 'log_action',
3766                                 'log_timestamp',
3767                                 'log_user',
3768                                 'log_namespace',
3769                                 'log_title',
3770                                 'log_comment',
3771                                 'log_params',
3772                                 'log_deleted',
3773                                 'user_name'
3774                         ], [
3775                                 'log_namespace' => $this->mTitle->getNamespace(),
3776                                 'log_title' => $this->mTitle->getDBkey(),
3777                                 'log_type' => 'delete',
3778                                 'log_action' => 'delete',
3779                                 'user_id=log_user'
3780                         ],
3781                         __METHOD__,
3782                         [ 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ]
3783                 );
3784                 // Quick paranoid permission checks...
3785                 if ( is_object( $data ) ) {
3786                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3787                                 $data->user_name = $this->context->msg( 'rev-deleted-user' )->escaped();
3788                         }
3789
3790                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3791                                 $data->log_comment = $this->context->msg( 'rev-deleted-comment' )->escaped();
3792                         }
3793                 }
3794
3795                 return $data;
3796         }
3797
3798         /**
3799          * Get the rendered text for previewing.
3800          * @throws MWException
3801          * @return string
3802          */
3803         function getPreviewText() {
3804                 global $wgOut, $wgRawHtml, $wgLang;
3805                 global $wgAllowUserCss, $wgAllowUserJs;
3806
3807                 $stats = $wgOut->getContext()->getStats();
3808
3809                 if ( $wgRawHtml && !$this->mTokenOk ) {
3810                         // Could be an offsite preview attempt. This is very unsafe if
3811                         // HTML is enabled, as it could be an attack.
3812                         $parsedNote = '';
3813                         if ( $this->textbox1 !== '' ) {
3814                                 // Do not put big scary notice, if previewing the empty
3815                                 // string, which happens when you initially edit
3816                                 // a category page, due to automatic preview-on-open.
3817                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3818                                         $this->context->msg( 'session_fail_preview_html' )->text() . "</div>",
3819                                         true, /* interface */true );
3820                         }
3821                         $stats->increment( 'edit.failures.session_loss' );
3822                         return $parsedNote;
3823                 }
3824
3825                 $note = '';
3826
3827                 try {
3828                         $content = $this->toEditContent( $this->textbox1 );
3829
3830                         $previewHTML = '';
3831                         if ( !Hooks::run(
3832                                 'AlternateEditPreview',
3833                                 [ $this, &$content, &$previewHTML, &$this->mParserOutput ] )
3834                         ) {
3835                                 return $previewHTML;
3836                         }
3837
3838                         # provide a anchor link to the editform
3839                         $continueEditing = '<span class="mw-continue-editing">' .
3840                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3841                                 $this->context->msg( 'continue-editing' )->text() . ']]</span>';
3842                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3843                                 if ( $this->mTokenOkExceptSuffix ) {
3844                                         $note = $this->context->msg( 'token_suffix_mismatch' )->plain();
3845                                         $stats->increment( 'edit.failures.bad_token' );
3846                                 } else {
3847                                         $note = $this->context->msg( 'session_fail_preview' )->plain();
3848                                         $stats->increment( 'edit.failures.session_loss' );
3849                                 }
3850                         } elseif ( $this->incompleteForm ) {
3851                                 $note = $this->context->msg( 'edit_form_incomplete' )->plain();
3852                                 if ( $this->mTriedSave ) {
3853                                         $stats->increment( 'edit.failures.incomplete_form' );
3854                                 }
3855                         } else {
3856                                 $note = $this->context->msg( 'previewnote' )->plain() . ' ' . $continueEditing;
3857                         }
3858
3859                         # don't parse non-wikitext pages, show message about preview
3860                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3861                                 if ( $this->mTitle->isCssJsSubpage() ) {
3862                                         $level = 'user';
3863                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3864                                         $level = 'site';
3865                                 } else {
3866                                         $level = false;
3867                                 }
3868
3869                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3870                                         $format = 'css';
3871                                         if ( $level === 'user' && !$wgAllowUserCss ) {
3872                                                 $format = false;
3873                                         }
3874                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3875                                         $format = 'js';
3876                                         if ( $level === 'user' && !$wgAllowUserJs ) {
3877                                                 $format = false;
3878                                         }
3879                                 } else {
3880                                         $format = false;
3881                                 }
3882
3883                                 # Used messages to make sure grep find them:
3884                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3885                                 if ( $level && $format ) {
3886                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3887                                                 $this->context->msg( "{$level}{$format}preview" )->text() .
3888                                                 ' ' . $continueEditing . "</div>";
3889                                 }
3890                         }
3891
3892                         # If we're adding a comment, we need to show the
3893                         # summary as the headline
3894                         if ( $this->section === "new" && $this->summary !== "" ) {
3895                                 $content = $content->addSectionHeader( $this->summary );
3896                         }
3897
3898                         $hook_args = [ $this, &$content ];
3899                         ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args, '1.25' );
3900                         Hooks::run( 'EditPageGetPreviewContent', $hook_args );
3901
3902                         $parserResult = $this->doPreviewParse( $content );
3903                         $parserOutput = $parserResult['parserOutput'];
3904                         $previewHTML = $parserResult['html'];
3905                         $this->mParserOutput = $parserOutput;
3906                         $wgOut->addParserOutputMetadata( $parserOutput );
3907
3908                         if ( count( $parserOutput->getWarnings() ) ) {
3909                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3910                         }
3911
3912                 } catch ( MWContentSerializationException $ex ) {
3913                         $m = $this->context->msg(
3914                                 'content-failed-to-parse',
3915                                 $this->contentModel,
3916                                 $this->contentFormat,
3917                                 $ex->getMessage()
3918                         );
3919                         $note .= "\n\n" . $m->parse();
3920                         $previewHTML = '';
3921                 }
3922
3923                 if ( $this->isConflict ) {
3924                         $conflict = '<h2 id="mw-previewconflict">'
3925                                 . $this->context->msg( 'previewconflict' )->escaped() . "</h2>\n";
3926                 } else {
3927                         $conflict = '<hr />';
3928                 }
3929
3930                 $previewhead = "<div class='previewnote'>\n" .
3931                         '<h2 id="mw-previewheader">' . $this->context->msg( 'preview' )->escaped() . "</h2>" .
3932                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3933
3934                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3935                 $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3936                         'class' => 'mw-content-' . $pageViewLang->getDir() ];
3937                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3938
3939                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3940         }
3941
3942         /**
3943          * Get parser options for a preview
3944          * @return ParserOptions
3945          */
3946         protected function getPreviewParserOptions() {
3947                 $parserOptions = $this->page->makeParserOptions( $this->mArticle->getContext() );
3948                 $parserOptions->setIsPreview( true );
3949                 $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3950                 $parserOptions->enableLimitReport();
3951                 return $parserOptions;
3952         }
3953
3954         /**
3955          * Parse the page for a preview. Subclasses may override this class, in order
3956          * to parse with different options, or to otherwise modify the preview HTML.
3957          *
3958          * @param Content $content The page content
3959          * @return array with keys:
3960          *   - parserOutput: The ParserOutput object
3961          *   - html: The HTML to be displayed
3962          */
3963         protected function doPreviewParse( Content $content ) {
3964                 global $wgUser;
3965                 $parserOptions = $this->getPreviewParserOptions();
3966                 $pstContent = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3967                 $scopedCallback = $parserOptions->setupFakeRevision(
3968                         $this->mTitle, $pstContent, $wgUser );
3969                 $parserOutput = $pstContent->getParserOutput( $this->mTitle, null, $parserOptions );
3970                 ScopedCallback::consume( $scopedCallback );
3971                 $parserOutput->setEditSectionTokens( false ); // no section edit links
3972                 return [
3973                         'parserOutput' => $parserOutput,
3974                         'html' => $parserOutput->getText() ];
3975         }
3976
3977         /**
3978          * @return array
3979          */
3980         function getTemplates() {
3981                 if ( $this->preview || $this->section != '' ) {
3982                         $templates = [];
3983                         if ( !isset( $this->mParserOutput ) ) {
3984                                 return $templates;
3985                         }
3986                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3987                                 foreach ( array_keys( $template ) as $dbk ) {
3988                                         $templates[] = Title::makeTitle( $ns, $dbk );
3989                                 }
3990                         }
3991                         return $templates;
3992                 } else {
3993                         return $this->mTitle->getTemplateLinksFrom();
3994                 }
3995         }
3996
3997         /**
3998          * Shows a bulletin board style toolbar for common editing functions.
3999          * It can be disabled in the user preferences.
4000          *
4001          * @param Title $title Title object for the page being edited (optional)
4002          * @return string
4003          */
4004         static function getEditToolbar( $title = null ) {
4005                 global $wgContLang, $wgOut;
4006                 global $wgEnableUploads, $wgForeignFileRepos;
4007
4008                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
4009                 $showSignature = true;
4010                 if ( $title ) {
4011                         $showSignature = MWNamespace::wantSignatures( $title->getNamespace() );
4012                 }
4013
4014                 /**
4015                  * $toolarray is an array of arrays each of which includes the
4016                  * opening tag, the closing tag, optionally a sample text that is
4017                  * inserted between the two when no selection is highlighted
4018                  * and.  The tip text is shown when the user moves the mouse
4019                  * over the button.
4020                  *
4021                  * Images are defined in ResourceLoaderEditToolbarModule.
4022                  */
4023                 $toolarray = [
4024                         [
4025                                 'id'     => 'mw-editbutton-bold',
4026                                 'open'   => '\'\'\'',
4027                                 'close'  => '\'\'\'',
4028                                 'sample' => wfMessage( 'bold_sample' )->text(),
4029                                 'tip'    => wfMessage( 'bold_tip' )->text(),
4030                         ],
4031                         [
4032                                 'id'     => 'mw-editbutton-italic',
4033                                 'open'   => '\'\'',
4034                                 'close'  => '\'\'',
4035                                 'sample' => wfMessage( 'italic_sample' )->text(),
4036                                 'tip'    => wfMessage( 'italic_tip' )->text(),
4037                         ],
4038                         [
4039                                 'id'     => 'mw-editbutton-link',
4040                                 'open'   => '[[',
4041                                 'close'  => ']]',
4042                                 'sample' => wfMessage( 'link_sample' )->text(),
4043                                 'tip'    => wfMessage( 'link_tip' )->text(),
4044                         ],
4045                         [
4046                                 'id'     => 'mw-editbutton-extlink',
4047                                 'open'   => '[',
4048                                 'close'  => ']',
4049                                 'sample' => wfMessage( 'extlink_sample' )->text(),
4050                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
4051                         ],
4052                         [
4053                                 'id'     => 'mw-editbutton-headline',
4054                                 'open'   => "\n== ",
4055                                 'close'  => " ==\n",
4056                                 'sample' => wfMessage( 'headline_sample' )->text(),
4057                                 'tip'    => wfMessage( 'headline_tip' )->text(),
4058                         ],
4059                         $imagesAvailable ? [
4060                                 'id'     => 'mw-editbutton-image',
4061                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
4062                                 'close'  => ']]',
4063                                 'sample' => wfMessage( 'image_sample' )->text(),
4064                                 'tip'    => wfMessage( 'image_tip' )->text(),
4065                         ] : false,
4066                         $imagesAvailable ? [
4067                                 'id'     => 'mw-editbutton-media',
4068                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
4069                                 'close'  => ']]',
4070                                 'sample' => wfMessage( 'media_sample' )->text(),
4071                                 'tip'    => wfMessage( 'media_tip' )->text(),
4072                         ] : false,
4073                         [
4074                                 'id'     => 'mw-editbutton-nowiki',
4075                                 'open'   => "<nowiki>",
4076                                 'close'  => "</nowiki>",
4077                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
4078                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
4079                         ],
4080                         $showSignature ? [
4081                                 'id'     => 'mw-editbutton-signature',
4082                                 'open'   => wfMessage( 'sig-text', '~~~~' )->inContentLanguage()->text(),
4083                                 'close'  => '',
4084                                 'sample' => '',
4085                                 'tip'    => wfMessage( 'sig_tip' )->text(),
4086                         ] : false,
4087                         [
4088                                 'id'     => 'mw-editbutton-hr',
4089                                 'open'   => "\n----\n",
4090                                 'close'  => '',
4091                                 'sample' => '',
4092                                 'tip'    => wfMessage( 'hr_tip' )->text(),
4093                         ]
4094                 ];
4095
4096                 $script = 'mw.loader.using("mediawiki.toolbar", function () {';
4097                 foreach ( $toolarray as $tool ) {
4098                         if ( !$tool ) {
4099                                 continue;
4100                         }
4101
4102                         $params = [
4103                                 // Images are defined in ResourceLoaderEditToolbarModule
4104                                 false,
4105                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
4106                                 // Older browsers show a "speedtip" type message only for ALT.
4107                                 // Ideally these should be different, realistically they
4108                                 // probably don't need to be.
4109                                 $tool['tip'],
4110                                 $tool['open'],
4111                                 $tool['close'],
4112                                 $tool['sample'],
4113                                 $tool['id'],
4114                         ];
4115
4116                         $script .= Xml::encodeJsCall(
4117                                 'mw.toolbar.addButton',
4118                                 $params,
4119                                 ResourceLoader::inDebugMode()
4120                         );
4121                 }
4122
4123                 $script .= '});';
4124                 $wgOut->addScript( ResourceLoader::makeInlineScript( $script ) );
4125
4126                 $toolbar = '<div id="toolbar"></div>';
4127
4128                 Hooks::run( 'EditPageBeforeEditToolbar', [ &$toolbar ] );
4129
4130                 return $toolbar;
4131         }
4132
4133         /**
4134          * Returns an array of html code of the following checkboxes:
4135          * minor and watch
4136          *
4137          * @param int $tabindex Current tabindex
4138          * @param array $checked Array of checkbox => bool, where bool indicates the checked
4139          *                 status of the checkbox
4140          *
4141          * @return array
4142          */
4143         public function getCheckboxes( &$tabindex, $checked ) {
4144                 global $wgUser, $wgUseMediaWikiUIEverywhere;
4145
4146                 $checkboxes = [];
4147
4148                 // don't show the minor edit checkbox if it's a new page or section
4149                 if ( !$this->isNew ) {
4150                         $checkboxes['minor'] = '';
4151                         $minorLabel = $this->context->msg( 'minoredit' )->parse();
4152                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
4153                                 $attribs = [
4154                                         'tabindex' => ++$tabindex,
4155                                         'accesskey' => $this->context->msg( 'accesskey-minoredit' )->text(),
4156                                         'id' => 'wpMinoredit',
4157                                 ];
4158                                 $minorEditHtml =
4159                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
4160                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
4161                                         Xml::expandAttributes( [ 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ] ) .
4162                                         ">{$minorLabel}</label>";
4163
4164                                 if ( $wgUseMediaWikiUIEverywhere ) {
4165                                         $checkboxes['minor'] = Html::openElement( 'div', [ 'class' => 'mw-ui-checkbox' ] ) .
4166                                                 $minorEditHtml .
4167                                         Html::closeElement( 'div' );
4168                                 } else {
4169                                         $checkboxes['minor'] = $minorEditHtml;
4170                                 }
4171                         }
4172                 }
4173
4174                 $watchLabel = $this->context->msg( 'watchthis' )->parse();
4175                 $checkboxes['watch'] = '';
4176                 if ( $wgUser->isLoggedIn() ) {
4177                         $attribs = [
4178                                 'tabindex' => ++$tabindex,
4179                                 'accesskey' => $this->context->msg( 'accesskey-watch' )->text(),
4180                                 'id' => 'wpWatchthis',
4181                         ];
4182                         $watchThisHtml =
4183                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
4184                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
4185                                 Xml::expandAttributes( [ 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ] ) .
4186                                 ">{$watchLabel}</label>";
4187                         if ( $wgUseMediaWikiUIEverywhere ) {
4188                                 $checkboxes['watch'] = Html::openElement( 'div', [ 'class' => 'mw-ui-checkbox' ] ) .
4189                                         $watchThisHtml .
4190                                         Html::closeElement( 'div' );
4191                         } else {
4192                                 $checkboxes['watch'] = $watchThisHtml;
4193                         }
4194                 }
4195                 Hooks::run( 'EditPageBeforeEditChecks', [ &$this, &$checkboxes, &$tabindex ] );
4196                 return $checkboxes;
4197         }
4198
4199         /**
4200          * Returns an array of html code of the following buttons:
4201          * save, diff, preview and live
4202          *
4203          * @param int $tabindex Current tabindex
4204          *
4205          * @return array
4206          */
4207         public function getEditButtons( &$tabindex ) {
4208                 $buttons = [];
4209
4210                 $labelAsPublish =
4211                         $this->mArticle->getContext()->getConfig()->get( 'EditSubmitButtonLabelPublish' );
4212
4213                 // Can't use $this->isNew as that's also true if we're adding a new section to an extant page
4214                 if ( $labelAsPublish ) {
4215                         $buttonLabelKey = !$this->mTitle->exists() ? 'publishpage' : 'publishchanges';
4216                 } else {
4217                         $buttonLabelKey = !$this->mTitle->exists() ? 'savearticle' : 'savechanges';
4218                 }
4219                 $buttonLabel = $this->context->msg( $buttonLabelKey )->text();
4220                 $attribs = [
4221                         'id' => 'wpSave',
4222                         'name' => 'wpSave',
4223                         'tabindex' => ++$tabindex,
4224                 ] + Linker::tooltipAndAccesskeyAttribs( 'save' );
4225                 $buttons['save'] = Html::submitButton( $buttonLabel, $attribs, [ 'mw-ui-progressive' ] );
4226
4227                 ++$tabindex; // use the same for preview and live preview
4228                 $attribs = [
4229                         'id' => 'wpPreview',
4230                         'name' => 'wpPreview',
4231                         'tabindex' => $tabindex,
4232                 ] + Linker::tooltipAndAccesskeyAttribs( 'preview' );
4233                 $buttons['preview'] = Html::submitButton( $this->context->msg( 'showpreview' )->text(),
4234                         $attribs );
4235                 $buttons['live'] = '';
4236
4237                 $attribs = [
4238                         'id' => 'wpDiff',
4239                         'name' => 'wpDiff',
4240                         'tabindex' => ++$tabindex,
4241                 ] + Linker::tooltipAndAccesskeyAttribs( 'diff' );
4242                 $buttons['diff'] = Html::submitButton( $this->context->msg( 'showdiff' )->text(),
4243                         $attribs );
4244
4245                 Hooks::run( 'EditPageBeforeEditButtons', [ &$this, &$buttons, &$tabindex ] );
4246                 return $buttons;
4247         }
4248
4249         /**
4250          * Creates a basic error page which informs the user that
4251          * they have attempted to edit a nonexistent section.
4252          */
4253         function noSuchSectionPage() {
4254                 global $wgOut;
4255
4256                 $wgOut->prepareErrorPage( $this->context->msg( 'nosuchsectiontitle' ) );
4257
4258                 $res = $this->context->msg( 'nosuchsectiontext', $this->section )->parseAsBlock();
4259                 Hooks::run( 'EditPageNoSuchSection', [ &$this, &$res ] );
4260                 $wgOut->addHTML( $res );
4261
4262                 $wgOut->returnToMain( false, $this->mTitle );
4263         }
4264
4265         /**
4266          * Show "your edit contains spam" page with your diff and text
4267          *
4268          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
4269          */
4270         public function spamPageWithContent( $match = false ) {
4271                 global $wgOut, $wgLang;
4272                 $this->textbox2 = $this->textbox1;
4273
4274                 if ( is_array( $match ) ) {
4275                         $match = $wgLang->listToText( $match );
4276                 }
4277                 $wgOut->prepareErrorPage( $this->context->msg( 'spamprotectiontitle' ) );
4278
4279                 $wgOut->addHTML( '<div id="spamprotected">' );
4280                 $wgOut->addWikiMsg( 'spamprotectiontext' );
4281                 if ( $match ) {
4282                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
4283                 }
4284                 $wgOut->addHTML( '</div>' );
4285
4286                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
4287                 $this->showDiff();
4288
4289                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
4290                 $this->showTextbox2();
4291
4292                 $wgOut->addReturnTo( $this->getContextTitle(), [ 'action' => 'edit' ] );
4293         }
4294
4295         /**
4296          * Check if the browser is on a blacklist of user-agents known to
4297          * mangle UTF-8 data on form submission. Returns true if Unicode
4298          * should make it through, false if it's known to be a problem.
4299          * @return bool
4300          */
4301         private function checkUnicodeCompliantBrowser() {
4302                 global $wgBrowserBlackList, $wgRequest;
4303
4304                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
4305                 if ( $currentbrowser === false ) {
4306                         // No User-Agent header sent? Trust it by default...
4307                         return true;
4308                 }
4309
4310                 foreach ( $wgBrowserBlackList as $browser ) {
4311                         if ( preg_match( $browser, $currentbrowser ) ) {
4312                                 return false;
4313                         }
4314                 }
4315                 return true;
4316         }
4317
4318         /**
4319          * Filter an input field through a Unicode de-armoring process if it
4320          * came from an old browser with known broken Unicode editing issues.
4321          *
4322          * @param WebRequest $request
4323          * @param string $field
4324          * @return string
4325          */
4326         protected function safeUnicodeInput( $request, $field ) {
4327                 $text = rtrim( $request->getText( $field ) );
4328                 return $request->getBool( 'safemode' )
4329                         ? $this->unmakeSafe( $text )
4330                         : $text;
4331         }
4332
4333         /**
4334          * Filter an output field through a Unicode armoring process if it is
4335          * going to an old browser with known broken Unicode editing issues.
4336          *
4337          * @param string $text
4338          * @return string
4339          */
4340         protected function safeUnicodeOutput( $text ) {
4341                 return $this->checkUnicodeCompliantBrowser()
4342                         ? $text
4343                         : $this->makeSafe( $text );
4344         }
4345
4346         /**
4347          * A number of web browsers are known to corrupt non-ASCII characters
4348          * in a UTF-8 text editing environment. To protect against this,
4349          * detected browsers will be served an armored version of the text,
4350          * with non-ASCII chars converted to numeric HTML character references.
4351          *
4352          * Preexisting such character references will have a 0 added to them
4353          * to ensure that round-trips do not alter the original data.
4354          *
4355          * @param string $invalue
4356          * @return string
4357          */
4358         private function makeSafe( $invalue ) {
4359                 // Armor existing references for reversibility.
4360                 $invalue = strtr( $invalue, [ "&#x" => "&#x0" ] );
4361
4362                 $bytesleft = 0;
4363                 $result = "";
4364                 $working = 0;
4365                 $valueLength = strlen( $invalue );
4366                 for ( $i = 0; $i < $valueLength; $i++ ) {
4367                         $bytevalue = ord( $invalue[$i] );
4368                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
4369                                 $result .= chr( $bytevalue );
4370                                 $bytesleft = 0;
4371                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
4372                                 $working = $working << 6;
4373                                 $working += ( $bytevalue & 0x3F );
4374                                 $bytesleft--;
4375                                 if ( $bytesleft <= 0 ) {
4376                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
4377                                 }
4378                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
4379                                 $working = $bytevalue & 0x1F;
4380                                 $bytesleft = 1;
4381                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
4382                                 $working = $bytevalue & 0x0F;
4383                                 $bytesleft = 2;
4384                         } else { // 1111 0xxx
4385                                 $working = $bytevalue & 0x07;
4386                                 $bytesleft = 3;
4387                         }
4388                 }
4389                 return $result;
4390         }
4391
4392         /**
4393          * Reverse the previously applied transliteration of non-ASCII characters
4394          * back to UTF-8. Used to protect data from corruption by broken web browsers
4395          * as listed in $wgBrowserBlackList.
4396          *
4397          * @param string $invalue
4398          * @return string
4399          */
4400         private function unmakeSafe( $invalue ) {
4401                 $result = "";
4402                 $valueLength = strlen( $invalue );
4403                 for ( $i = 0; $i < $valueLength; $i++ ) {
4404                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
4405                                 $i += 3;
4406                                 $hexstring = "";
4407                                 do {
4408                                         $hexstring .= $invalue[$i];
4409                                         $i++;
4410                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
4411
4412                                 // Do some sanity checks. These aren't needed for reversibility,
4413                                 // but should help keep the breakage down if the editor
4414                                 // breaks one of the entities whilst editing.
4415                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) && ( strlen( $hexstring ) <= 6 ) ) {
4416                                         $codepoint = hexdec( $hexstring );
4417                                         $result .= UtfNormal\Utils::codepointToUtf8( $codepoint );
4418                                 } else {
4419                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
4420                                 }
4421                         } else {
4422                                 $result .= substr( $invalue, $i, 1 );
4423                         }
4424                 }
4425                 // reverse the transform that we made for reversibility reasons.
4426                 return strtr( $result, [ "&#x0" => "&#x" ] );
4427         }
4428 }